/var/lib/jenkins/workspace/firefox-scan-build/obj-x86_64-pc-linux-gnu/dist/include/nsCOMPtr.h

Bug Summary

File:	var/lib/jenkins/workspace/firefox-scan-build/obj-x86_64-pc-linux-gnu/dist/include/nsCOMPtr.h
Warning:	line 342, column 5 Branch condition evaluates to a garbage value

Annotated Source Code

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clang -cc1 -cc1 -triple x86_64-pc-linux-gnu -analyze -disable-free -clear-ast-before-backend -disable-llvm-verifier -discard-value-names -main-file-name EventStateManager.cpp -analyzer-checker=core -analyzer-checker=apiModeling -analyzer-checker=unix -analyzer-checker=deadcode -analyzer-checker=cplusplus -analyzer-checker=security.insecureAPI.UncheckedReturn -analyzer-checker=security.insecureAPI.getpw -analyzer-checker=security.insecureAPI.gets -analyzer-checker=security.insecureAPI.mktemp -analyzer-checker=security.insecureAPI.mkstemp -analyzer-checker=security.insecureAPI.vfork -analyzer-checker=nullability.NullPassedToNonnull -analyzer-checker=nullability.NullReturnedFromNonnull -analyzer-output plist -w -setup-static-analyzer -analyzer-config-compatibility-mode=true -mrelocation-model pic -pic-level 2 -fhalf-no-semantic-interposition -mframe-pointer=all -relaxed-aliasing -ffp-contract=off -fno-rounding-math -mconstructor-aliases -funwind-tables=2 -target-cpu x86-64 -tune-cpu generic -debugger-tuning=gdb -fdebug-compilation-dir=/var/lib/jenkins/workspace/firefox-scan-build/obj-x86_64-pc-linux-gnu/dom/events -fcoverage-compilation-dir=/var/lib/jenkins/workspace/firefox-scan-build/obj-x86_64-pc-linux-gnu/dom/events -resource-dir /usr/lib/llvm-19/lib/clang/19 -include /var/lib/jenkins/workspace/firefox-scan-build/config/gcc_hidden.h -include /var/lib/jenkins/workspace/firefox-scan-build/obj-x86_64-pc-linux-gnu/mozilla-config.h -I /var/lib/jenkins/workspace/firefox-scan-build/obj-x86_64-pc-linux-gnu/dist/stl_wrappers -I /var/lib/jenkins/workspace/firefox-scan-build/obj-x86_64-pc-linux-gnu/dist/system_wrappers -U _FORTIFY_SOURCE -D _FORTIFY_SOURCE=2 -D DEBUG=1 -D MOZ_HAS_MOZGLUE -D MOZILLA_INTERNAL_API -D IMPL_LIBXUL -D MOZ_SUPPORT_LEAKCHECKING -D STATIC_EXPORTABLE_JS_API -I /var/lib/jenkins/workspace/firefox-scan-build/dom/events -I /var/lib/jenkins/workspace/firefox-scan-build/obj-x86_64-pc-linux-gnu/dom/events -I /var/lib/jenkins/workspace/firefox-scan-build/obj-x86_64-pc-linux-gnu/ipc/ipdl/_ipdlheaders -I /var/lib/jenkins/workspace/firefox-scan-build/ipc/chromium/src -I /var/lib/jenkins/workspace/firefox-scan-build/docshell/base -I /var/lib/jenkins/workspace/firefox-scan-build/dom/base -I /var/lib/jenkins/workspace/firefox-scan-build/dom/html -I /var/lib/jenkins/workspace/firefox-scan-build/dom/storage -I /var/lib/jenkins/workspace/firefox-scan-build/dom/xml -I /var/lib/jenkins/workspace/firefox-scan-build/dom/xul -I /var/lib/jenkins/workspace/firefox-scan-build/js/xpconnect/wrappers -I /var/lib/jenkins/workspace/firefox-scan-build/layout/forms -I /var/lib/jenkins/workspace/firefox-scan-build/layout/generic -I /var/lib/jenkins/workspace/firefox-scan-build/layout/xul -I /var/lib/jenkins/workspace/firefox-scan-build/layout/xul/tree -I /var/lib/jenkins/workspace/firefox-scan-build/obj-x86_64-pc-linux-gnu/dist/include -I /var/lib/jenkins/workspace/firefox-scan-build/obj-x86_64-pc-linux-gnu/dist/include/nspr -I /var/lib/jenkins/workspace/firefox-scan-build/obj-x86_64-pc-linux-gnu/dist/include/nss -D MOZILLA_CLIENT -internal-isystem /usr/lib/gcc/x86_64-linux-gnu/14/../../../../include/c++/14 -internal-isystem /usr/lib/gcc/x86_64-linux-gnu/14/../../../../include/x86_64-linux-gnu/c++/14 -internal-isystem /usr/lib/gcc/x86_64-linux-gnu/14/../../../../include/c++/14/backward -internal-isystem /usr/lib/llvm-19/lib/clang/19/include -internal-isystem /usr/local/include -internal-isystem /usr/lib/gcc/x86_64-linux-gnu/14/../../../../x86_64-linux-gnu/include -internal-externc-isystem /usr/include/x86_64-linux-gnu -internal-externc-isystem /include -internal-externc-isystem /usr/include -O2 -Wno-error=tautological-type-limit-compare -Wno-invalid-offsetof -Wno-range-loop-analysis -Wno-deprecated-anon-enum-enum-conversion -Wno-deprecated-enum-enum-conversion -Wno-deprecated-this-capture -Wno-inline-new-delete -Wno-error=deprecated-declarations -Wno-error=array-bounds -Wno-error=free-nonheap-object -Wno-error=atomic-alignment -Wno-error=deprecated-builtins -Wno-psabi -Wno-error=builtin-macro-redefined -Wno-vla-cxx-extension -Wno-unknown-warning-option -fdeprecated-macro -ferror-limit 19 -fstrict-flex-arrays=1 -stack-protector 2 -fstack-clash-protection -ftrivial-auto-var-init=pattern -fno-rtti -fgnuc-version=4.2.1 -fskip-odr-check-in-gmf -fno-sized-deallocation -fno-aligned-allocation -vectorize-loops -vectorize-slp -analyzer-checker optin.performance.Padding -analyzer-output=html -analyzer-config stable-report-filename=true -faddrsig -D__GCC_HAVE_DWARF2_CFI_ASM=1 -o /tmp/scan-build-2024-09-22-115206-3586786-1 -x c++ /var/lib/jenkins/workspace/firefox-scan-build/dom/events/EventStateManager.cpp

/var/lib/jenkins/workspace/firefox-scan-build/dom/events/EventStateManager.cpp

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1/* -*- Mode: C++; tab-width: 8; indent-tabs-mode: nil; c-basic-offset: 2 -*- */
2/* vim: set ts=8 sts=2 et sw=2 tw=80: */
3/* This Source Code Form is subject to the terms of the Mozilla Public
4 * License, v. 2.0. If a copy of the MPL was not distributed with this
5 * file, You can obtain one at http://mozilla.org/MPL/2.0/. */
6 
7#include "EventStateManager.h"
8 
9#include "mozilla/AsyncEventDispatcher.h"
10#include "mozilla/Attributes.h"
11#include "mozilla/EditorBase.h"
12#include "mozilla/EventDispatcher.h"
13#include "mozilla/EventForwards.h"
14#include "mozilla/Hal.h"
15#include "mozilla/HTMLEditor.h"
16#include "mozilla/IMEStateManager.h"
17#include "mozilla/Likely.h"
18#include "mozilla/FocusModel.h"
19#include "mozilla/MiscEvents.h"
20#include "mozilla/MathAlgorithms.h"
21#include "mozilla/MouseEvents.h"
22#include "mozilla/PointerLockManager.h"
23#include "mozilla/PresShell.h"
24#include "mozilla/ScopeExit.h"
25#include "mozilla/ScrollTypes.h"
26#include "mozilla/TextComposition.h"
27#include "mozilla/TextControlElement.h"
28#include "mozilla/TextEditor.h"
29#include "mozilla/TextEvents.h"
30#include "mozilla/TouchEvents.h"
31#include "mozilla/Telemetry.h"
32#include "mozilla/UniquePtr.h"
33#include "mozilla/dom/BrowserBridgeChild.h"
34#include "mozilla/dom/BrowsingContext.h"
35#include "mozilla/dom/CanonicalBrowsingContext.h"
36#include "mozilla/dom/ContentChild.h"
37#include "mozilla/dom/DOMIntersectionObserver.h"
38#include "mozilla/dom/DragEvent.h"
39#include "mozilla/dom/Event.h"
40#include "mozilla/dom/FrameLoaderBinding.h"
41#include "mozilla/dom/HTMLLabelElement.h"
42#include "mozilla/dom/HTMLInputElement.h"
43#include "mozilla/dom/MouseEventBinding.h"
44#include "mozilla/dom/BrowserChild.h"
45#include "mozilla/dom/PointerEventHandler.h"
46#include "mozilla/dom/UIEvent.h"
47#include "mozilla/dom/UIEventBinding.h"
48#include "mozilla/dom/UserActivation.h"
49#include "mozilla/dom/WheelEventBinding.h"
50#include "mozilla/glean/GleanMetrics.h"
51#include "mozilla/ScrollContainerFrame.h"
52#include "mozilla/StaticPrefs_accessibility.h"
53#include "mozilla/StaticPrefs_browser.h"
54#include "mozilla/StaticPrefs_dom.h"
55#include "mozilla/StaticPrefs_layout.h"
56#include "mozilla/StaticPrefs_mousewheel.h"
57#include "mozilla/StaticPrefs_ui.h"
58#include "mozilla/StaticPrefs_zoom.h"
59 
60#include "ContentEventHandler.h"
61#include "IMEContentObserver.h"
62#include "WheelHandlingHelper.h"
63#include "RemoteDragStartData.h"
64 
65#include "nsCommandParams.h"
66#include "nsCOMPtr.h"
67#include "nsCopySupport.h"
68#include "nsFocusManager.h"
69#include "nsGenericHTMLElement.h"
70#include "nsIClipboard.h"
71#include "nsIContent.h"
72#include "nsIContentInlines.h"
73#include "mozilla/dom/Document.h"
74#include "nsICookieJarSettings.h"
75#include "nsIFrame.h"
76#include "nsFrameLoaderOwner.h"
77#include "nsIWeakReferenceUtils.h"
78#include "nsIWidget.h"
79#include "nsLiteralString.h"
80#include "nsPresContext.h"
81#include "nsTArray.h"
82#include "nsGkAtoms.h"
83#include "nsIFormControl.h"
84#include "nsComboboxControlFrame.h"
85#include "nsIDOMXULControlElement.h"
86#include "nsNameSpaceManager.h"
87#include "nsIBaseWindow.h"
88#include "nsFrameSelection.h"
89#include "nsPIDOMWindow.h"
90#include "nsPIWindowRoot.h"
91#include "nsIWebNavigation.h"
92#include "nsIDocumentViewer.h"
93#include "nsFrameManager.h"
94#include "nsIBrowserChild.h"
95#include "nsMenuPopupFrame.h"
96 
97#include "nsIObserverService.h"
98#include "nsIDocShell.h"
99 
100#include "nsSubDocumentFrame.h"
101#include "nsLayoutUtils.h"
102#include "nsIInterfaceRequestorUtils.h"
103#include "nsUnicharUtils.h"
104#include "nsContentUtils.h"
105 
106#include "imgIContainer.h"
107#include "nsIProperties.h"
108#include "nsISupportsPrimitives.h"
109 
110#include "nsServiceManagerUtils.h"
111#include "nsITimer.h"
112#include "nsFontMetrics.h"
113#include "nsIDragService.h"
114#include "nsIDragSession.h"
115#include "mozilla/dom/DataTransfer.h"
116#include "nsContentAreaDragDrop.h"
117#include "nsTreeBodyFrame.h"
118#include "nsIController.h"
119#include "mozilla/Services.h"
120#include "mozilla/dom/ContentParent.h"
121#include "mozilla/dom/Record.h"
122#include "mozilla/dom/Selection.h"
123 
124#include "mozilla/Preferences.h"
125#include "mozilla/LookAndFeel.h"
126#include "mozilla/ProfilerLabels.h"
127#include "Units.h"
128 
129#ifdef XP_MACOSX
130#  import <ApplicationServices/ApplicationServices.h>
131#endif
132 
133namespace mozilla {
134 
135using namespace dom;
136 
137static const LayoutDeviceIntPoint kInvalidRefPoint =
138    LayoutDeviceIntPoint(-1, -1);
139 
140static uint32_t gMouseOrKeyboardEventCounter = 0;
141static nsITimer* gUserInteractionTimer = nullptr;
142static nsITimerCallback* gUserInteractionTimerCallback = nullptr;
143 
144static const double kCursorLoadingTimeout = 1000;  // ms
145static AutoWeakFrame gLastCursorSourceFrame;
146static TimeStamp gLastCursorUpdateTime;
147static TimeStamp gTypingStartTime;
148static TimeStamp gTypingEndTime;
149static int32_t gTypingInteractionKeyPresses = 0;
150static dom::InteractionData gTypingInteraction = {};
151 
152static inline int32_t RoundDown(double aDouble) {
153  return (aDouble > 0) ? static_cast<int32_t>(floor(aDouble))
154                       : static_cast<int32_t>(ceil(aDouble));
155}
156 
157static bool IsSelectingLink(nsIFrame* aTargetFrame) {
158  if (!aTargetFrame) {
159    return false;
160  }
161  const nsFrameSelection* frameSel = aTargetFrame->GetConstFrameSelection();
162  if (!frameSel || !frameSel->GetDragState()) {
163    return false;
164  }
165 
166  if (!nsContentUtils::GetClosestLinkInFlatTree(aTargetFrame->GetContent())) {
167    return false;
168  }
169  return true;
170}
171 
172static UniquePtr<WidgetMouseEvent> CreateMouseOrPointerWidgetEvent(
173    WidgetMouseEvent* aMouseEvent, EventMessage aMessage,
174    EventTarget* aRelatedTarget);
175 
176/**
177 * Returns the common ancestor for mouseup purpose, given the
178 * current mouseup target and the previous mousedown target.
179 */
180static nsINode* GetCommonAncestorForMouseUp(
181    nsINode* aCurrentMouseUpTarget, nsINode* aLastMouseDownTarget,
182    Maybe<FormControlType>& aLastMouseDownInputControlType) {
183  if (!aCurrentMouseUpTarget || !aLastMouseDownTarget) {
184    return nullptr;
185  }
186 
187  if (aCurrentMouseUpTarget == aLastMouseDownTarget) {
188    return aCurrentMouseUpTarget;
189  }
190 
191  // Build the chain of parents
192  AutoTArray<nsINode*, 30> parents1;
193  do {
194    parents1.AppendElement(aCurrentMouseUpTarget);
195    aCurrentMouseUpTarget = aCurrentMouseUpTarget->GetFlattenedTreeParentNode();
196  } while (aCurrentMouseUpTarget);
197 
198  AutoTArray<nsINode*, 30> parents2;
199  do {
200    parents2.AppendElement(aLastMouseDownTarget);
201    if (aLastMouseDownTarget == parents1.LastElement()) {
202      break;
203    }
204    aLastMouseDownTarget = aLastMouseDownTarget->GetFlattenedTreeParentNode();
205  } while (aLastMouseDownTarget);
206 
207  // Find where the parent chain differs
208  uint32_t pos1 = parents1.Length();
209  uint32_t pos2 = parents2.Length();
210  nsINode* parent = nullptr;
211  for (uint32_t len = std::min(pos1, pos2); len > 0; --len) {
212    nsINode* child1 = parents1.ElementAt(--pos1);
213    nsINode* child2 = parents2.ElementAt(--pos2);
214    if (child1 != child2) {
215      break;
216    }
217 
218    // If the input control type is different between mouseup and mousedown,
219    // this is not a valid click.
220    if (HTMLInputElement* input = HTMLInputElement::FromNodeOrNull(child1)) {
221      if (aLastMouseDownInputControlType.isSome() &&
222          aLastMouseDownInputControlType.ref() != input->ControlType()) {
223        break;
224      }
225    }
226    parent = child1;
227  }
228 
229  return parent;
230}
231 
232LazyLogModule sMouseBoundaryLog("MouseBoundaryEvents");
233LazyLogModule sPointerBoundaryLog("PointerBoundaryEvents");
234 
235/******************************************************************/
236/* mozilla::UITimerCallback                                       */
237/******************************************************************/
238 
239class UITimerCallback final : public nsITimerCallback, public nsINamed {
240 public:
241  UITimerCallback() : mPreviousCount(0) {}
242  NS_DECL_ISUPPORTSpublic: virtual nsresult QueryInterface(const nsIID& aIID
, void** aInstancePtr) override; virtual MozExternalRefCountType
 AddRef(void) override; virtual MozExternalRefCountType Release
(void) override; using HasThreadSafeRefCnt = std::false_type;
 protected: nsAutoRefCnt mRefCnt; nsAutoOwningThread _mOwningThread
; public:
243  NS_DECL_NSITIMERCALLBACKvirtual nsresult Notify(nsITimer *timer) override; inline void
 _ensure_GetName_exists(void) { static_assert(std::is_convertible
<decltype(this), nsINamed*>::value, "nsITimerCallback implementations must also implement nsINamed"
); }
244  NS_DECL_NSINAMEDvirtual nsresult GetName(nsACString& aName) override;
245 private:
246  ~UITimerCallback() = default;
247  uint32_t mPreviousCount;
248};
249 
250NS_IMPL_ISUPPORTS(UITimerCallback, nsITimerCallback, nsINamed)MozExternalRefCountType UITimerCallback::AddRef(void) { static_assert
(!std::is_destructible_v<UITimerCallback>, "Reference-counted class "
 "UITimerCallback" " should not have a public destructor. " "Make this class's destructor non-public"
); do { static_assert( mozilla::detail::AssertionConditionType
<decltype(int32_t(mRefCnt) >= 0)>::isValid, "invalid assertion condition"
); if ((__builtin_expect(!!(!(!!(int32_t(mRefCnt) >= 0))),
 0))) { do { } while (false); MOZ_ReportAssertionFailure("int32_t(mRefCnt) >= 0"
 " (" "illegal refcnt" ")", "/var/lib/jenkins/workspace/firefox-scan-build/dom/events/EventStateManager.cpp"
, 250); AnnotateMozCrashReason("MOZ_ASSERT" "(" "int32_t(mRefCnt) >= 0"
 ") (" "illegal refcnt" ")"); do { *((volatile int*)__null) =
 250; __attribute__((nomerge)) ::abort(); } while (false); } }
 while (false); do { static_assert( mozilla::detail::AssertionConditionType
<decltype("UITimerCallback" != nullptr)>::isValid, "invalid assertion condition"
); if ((__builtin_expect(!!(!(!!("UITimerCallback" != nullptr
))), 0))) { do { } while (false); MOZ_ReportAssertionFailure(
"\"UITimerCallback\" != nullptr" " (" "Must specify a name" ")"
, "/var/lib/jenkins/workspace/firefox-scan-build/dom/events/EventStateManager.cpp"
, 250); AnnotateMozCrashReason("MOZ_ASSERT" "(" "\"UITimerCallback\" != nullptr"
 ") (" "Must specify a name" ")"); do { *((volatile int*)__null
) = 250; __attribute__((nomerge)) ::abort(); } while (false);
 } } while (false); if (!mRefCnt.isThreadSafe) _mOwningThread
.AssertOwnership("UITimerCallback" " not thread-safe"); nsrefcnt
 count = ++mRefCnt; NS_LogAddRef((this), (count), ("UITimerCallback"
), (uint32_t)(sizeof(*this))); return count; } MozExternalRefCountType
 UITimerCallback::Release(void) { do { static_assert( mozilla
::detail::AssertionConditionType<decltype(int32_t(mRefCnt)
 > 0)>::isValid, "invalid assertion condition"); if ((__builtin_expect
(!!(!(!!(int32_t(mRefCnt) > 0))), 0))) { do { } while (false
); MOZ_ReportAssertionFailure("int32_t(mRefCnt) > 0" " (" "dup release"
 ")", "/var/lib/jenkins/workspace/firefox-scan-build/dom/events/EventStateManager.cpp"
, 250); AnnotateMozCrashReason("MOZ_ASSERT" "(" "int32_t(mRefCnt) > 0"
 ") (" "dup release" ")"); do { *((volatile int*)__null) = 250
; __attribute__((nomerge)) ::abort(); } while (false); } } while
 (false); do { static_assert( mozilla::detail::AssertionConditionType
<decltype("UITimerCallback" != nullptr)>::isValid, "invalid assertion condition"
); if ((__builtin_expect(!!(!(!!("UITimerCallback" != nullptr
))), 0))) { do { } while (false); MOZ_ReportAssertionFailure(
"\"UITimerCallback\" != nullptr" " (" "Must specify a name" ")"
, "/var/lib/jenkins/workspace/firefox-scan-build/dom/events/EventStateManager.cpp"
, 250); AnnotateMozCrashReason("MOZ_ASSERT" "(" "\"UITimerCallback\" != nullptr"
 ") (" "Must specify a name" ")"); do { *((volatile int*)__null
) = 250; __attribute__((nomerge)) ::abort(); } while (false);
 } } while (false); if (!mRefCnt.isThreadSafe) _mOwningThread
.AssertOwnership("UITimerCallback" " not thread-safe"); const
 char* const nametmp = "UITimerCallback"; nsrefcnt count = --
mRefCnt; NS_LogRelease((this), (count), (nametmp)); if (count
 == 0) { mRefCnt = 1; delete (this); return 0; } return count
; } nsresult UITimerCallback::QueryInterface(const nsIID&
 aIID, void** aInstancePtr) { do { if (!(aInstancePtr)) { NS_DebugBreak
(NS_DEBUG_ASSERTION, "QueryInterface requires a non-NULL destination!"
, "aInstancePtr", "/var/lib/jenkins/workspace/firefox-scan-build/dom/events/EventStateManager.cpp"
, 250); MOZ_PretendNoReturn(); } } while (0); nsresult rv = NS_ERROR_FAILURE
; static_assert(2 > 0, "Need more arguments to NS_INTERFACE_TABLE"
); static const QITableEntry table[] = { {&mozilla::detail
::kImplementedIID<UITimerCallback, nsITimerCallback>, int32_t
( reinterpret_cast<char*>(static_cast<nsITimerCallback
*>((UITimerCallback*)0x1000)) - reinterpret_cast<char*>
((UITimerCallback*)0x1000))}, {&mozilla::detail::kImplementedIID
<UITimerCallback, nsINamed>, int32_t( reinterpret_cast<
char*>(static_cast<nsINamed*>((UITimerCallback*)0x1000
)) - reinterpret_cast<char*>((UITimerCallback*)0x1000))
}, {&mozilla::detail::kImplementedIID<UITimerCallback,
 nsISupports>, int32_t(reinterpret_cast<char*>(static_cast
<nsISupports*>( static_cast<nsITimerCallback*>((UITimerCallback
*)0x1000))) - reinterpret_cast<char*>((UITimerCallback*
)0x1000))}, { nullptr, 0 } } ; static_assert((sizeof(table) /
 sizeof(table[0])) > 1, "need at least 1 interface"); rv =
 NS_TableDrivenQI(static_cast<void*>(this), aIID, aInstancePtr
, table); return rv; }
251 
252// If aTimer is nullptr, this method always sends "user-interaction-inactive"
253// notification.
254NS_IMETHODIMPnsresult
255UITimerCallback::Notify(nsITimer* aTimer) {
256  nsCOMPtr<nsIObserverService> obs = mozilla::services::GetObserverService();
257  if (!obs) return NS_ERROR_FAILURE;
258  if ((gMouseOrKeyboardEventCounter == mPreviousCount) || !aTimer) {
259    gMouseOrKeyboardEventCounter = 0;
260    obs->NotifyObservers(nullptr, "user-interaction-inactive", nullptr);
261    if (gUserInteractionTimer) {
262      gUserInteractionTimer->Cancel();
263      NS_RELEASE(gUserInteractionTimer)do { (gUserInteractionTimer)->Release(); (gUserInteractionTimer
) = 0; } while (0);
264    }
265  } else {
266    obs->NotifyObservers(nullptr, "user-interaction-active", nullptr);
267    EventStateManager::UpdateUserActivityTimer();
268 
269    if (XRE_IsParentProcess()) {
270      hal::BatteryInformation batteryInfo;
271      hal::GetCurrentBatteryInformation(&batteryInfo);
272      glean::power_battery::percentage_when_user_active.AccumulateSingleSample(
273          uint64_t(batteryInfo.level() * 100));
274    }
275  }
276  mPreviousCount = gMouseOrKeyboardEventCounter;
277  return NS_OK;
278}
279 
280NS_IMETHODIMPnsresult
281UITimerCallback::GetName(nsACString& aName) {
282  aName.AssignLiteral("UITimerCallback_timer");
283  return NS_OK;
284}
285 
286/******************************************************************/
287/* mozilla::OverOutElementsWrapper                                */
288/******************************************************************/
289 
290NS_IMPL_CYCLE_COLLECTION(OverOutElementsWrapper, mDeepestEnterEventTarget,OverOutElementsWrapper::cycleCollection OverOutElementsWrapper
::_cycleCollectorGlobal; void OverOutElementsWrapper::cycleCollection
::Unlink(void* p) { OverOutElementsWrapper* tmp = DowncastCCParticipant
<OverOutElementsWrapper>(p); ImplCycleCollectionUnlink(
tmp->mDeepestEnterEventTarget); ImplCycleCollectionUnlink(
tmp->mDispatchingOverEventTarget); ImplCycleCollectionUnlink
(tmp->mDispatchingOutOrDeepestLeaveEventTarget); (void)tmp
; } nsresult OverOutElementsWrapper::cycleCollection::TraverseNative
( void* p, nsCycleCollectionTraversalCallback& cb) { OverOutElementsWrapper
* tmp = DowncastCCParticipant<OverOutElementsWrapper>(p
); cb.DescribeRefCountedNode(tmp->mRefCnt.get(), "OverOutElementsWrapper"
); ImplCycleCollectionTraverse(cb, tmp->mDeepestEnterEventTarget
, "mDeepestEnterEventTarget", 0); ImplCycleCollectionTraverse
(cb, tmp->mDispatchingOverEventTarget, "mDispatchingOverEventTarget"
, 0); ImplCycleCollectionTraverse(cb, tmp->mDispatchingOutOrDeepestLeaveEventTarget
, "mDispatchingOutOrDeepestLeaveEventTarget", 0); (void)tmp; return
 NS_OK; }
291                         mDispatchingOverEventTarget,OverOutElementsWrapper::cycleCollection OverOutElementsWrapper
::_cycleCollectorGlobal; void OverOutElementsWrapper::cycleCollection
::Unlink(void* p) { OverOutElementsWrapper* tmp = DowncastCCParticipant
<OverOutElementsWrapper>(p); ImplCycleCollectionUnlink(
tmp->mDeepestEnterEventTarget); ImplCycleCollectionUnlink(
tmp->mDispatchingOverEventTarget); ImplCycleCollectionUnlink
(tmp->mDispatchingOutOrDeepestLeaveEventTarget); (void)tmp
; } nsresult OverOutElementsWrapper::cycleCollection::TraverseNative
( void* p, nsCycleCollectionTraversalCallback& cb) { OverOutElementsWrapper
* tmp = DowncastCCParticipant<OverOutElementsWrapper>(p
); cb.DescribeRefCountedNode(tmp->mRefCnt.get(), "OverOutElementsWrapper"
); ImplCycleCollectionTraverse(cb, tmp->mDeepestEnterEventTarget
, "mDeepestEnterEventTarget", 0); ImplCycleCollectionTraverse
(cb, tmp->mDispatchingOverEventTarget, "mDispatchingOverEventTarget"
, 0); ImplCycleCollectionTraverse(cb, tmp->mDispatchingOutOrDeepestLeaveEventTarget
, "mDispatchingOutOrDeepestLeaveEventTarget", 0); (void)tmp; return
 NS_OK; }
292                         mDispatchingOutOrDeepestLeaveEventTarget)OverOutElementsWrapper::cycleCollection OverOutElementsWrapper
::_cycleCollectorGlobal; void OverOutElementsWrapper::cycleCollection
::Unlink(void* p) { OverOutElementsWrapper* tmp = DowncastCCParticipant
<OverOutElementsWrapper>(p); ImplCycleCollectionUnlink(
tmp->mDeepestEnterEventTarget); ImplCycleCollectionUnlink(
tmp->mDispatchingOverEventTarget); ImplCycleCollectionUnlink
(tmp->mDispatchingOutOrDeepestLeaveEventTarget); (void)tmp
; } nsresult OverOutElementsWrapper::cycleCollection::TraverseNative
( void* p, nsCycleCollectionTraversalCallback& cb) { OverOutElementsWrapper
* tmp = DowncastCCParticipant<OverOutElementsWrapper>(p
); cb.DescribeRefCountedNode(tmp->mRefCnt.get(), "OverOutElementsWrapper"
); ImplCycleCollectionTraverse(cb, tmp->mDeepestEnterEventTarget
, "mDeepestEnterEventTarget", 0); ImplCycleCollectionTraverse
(cb, tmp->mDispatchingOverEventTarget, "mDispatchingOverEventTarget"
, 0); ImplCycleCollectionTraverse(cb, tmp->mDispatchingOutOrDeepestLeaveEventTarget
, "mDispatchingOutOrDeepestLeaveEventTarget", 0); (void)tmp; return
 NS_OK; }
293NS_IMPL_CYCLE_COLLECTING_ADDREF(OverOutElementsWrapper)MozExternalRefCountType OverOutElementsWrapper::AddRef(void) {
 static_assert(!std::is_destructible_v<OverOutElementsWrapper
>, "Reference-counted class " "OverOutElementsWrapper" " should not have a public destructor. "
 "Make this class's destructor non-public"); do { static_assert
( mozilla::detail::AssertionConditionType<decltype(int32_t
(mRefCnt) >= 0)>::isValid, "invalid assertion condition"
); if ((__builtin_expect(!!(!(!!(int32_t(mRefCnt) >= 0))),
 0))) { do { } while (false); MOZ_ReportAssertionFailure("int32_t(mRefCnt) >= 0"
 " (" "illegal refcnt" ")", "/var/lib/jenkins/workspace/firefox-scan-build/dom/events/EventStateManager.cpp"
, 293); AnnotateMozCrashReason("MOZ_ASSERT" "(" "int32_t(mRefCnt) >= 0"
 ") (" "illegal refcnt" ")"); do { *((volatile int*)__null) =
 293; __attribute__((nomerge)) ::abort(); } while (false); } }
 while (false); _mOwningThread.AssertOwnership("OverOutElementsWrapper"
 " not thread-safe"); nsISupports* base = OverOutElementsWrapper
::cycleCollection::Upcast(this); nsrefcnt count = mRefCnt.incr
(base); NS_LogAddRef((this), (count), ("OverOutElementsWrapper"
), (uint32_t)(sizeof(*this))); return count; }
294NS_IMPL_CYCLE_COLLECTING_RELEASE(OverOutElementsWrapper)MozExternalRefCountType OverOutElementsWrapper::Release(void)
 { do { static_assert( mozilla::detail::AssertionConditionType
<decltype(int32_t(mRefCnt) > 0)>::isValid, "invalid assertion condition"
); if ((__builtin_expect(!!(!(!!(int32_t(mRefCnt) > 0))), 0
))) { do { } while (false); MOZ_ReportAssertionFailure("int32_t(mRefCnt) > 0"
 " (" "dup release" ")", "/var/lib/jenkins/workspace/firefox-scan-build/dom/events/EventStateManager.cpp"
, 294); AnnotateMozCrashReason("MOZ_ASSERT" "(" "int32_t(mRefCnt) > 0"
 ") (" "dup release" ")"); do { *((volatile int*)__null) = 294
; __attribute__((nomerge)) ::abort(); } while (false); } } while
 (false); _mOwningThread.AssertOwnership("OverOutElementsWrapper"
 " not thread-safe"); nsISupports* base = OverOutElementsWrapper
::cycleCollection::Upcast(this); nsrefcnt count = mRefCnt.decr
(base); NS_LogRelease((this), (count), ("OverOutElementsWrapper"
)); return count; } void OverOutElementsWrapper::DeleteCycleCollectable
(void) { delete (this); }
295 
296NS_INTERFACE_MAP_BEGIN_CYCLE_COLLECTION(OverOutElementsWrapper)nsresult OverOutElementsWrapper::QueryInterface(const nsIID&
 aIID, void** aInstancePtr) { do { if (!(aInstancePtr)) { NS_DebugBreak
(NS_DEBUG_ASSERTION, "QueryInterface requires a non-NULL destination!"
, "aInstancePtr", "/var/lib/jenkins/workspace/firefox-scan-build/dom/events/EventStateManager.cpp"
, 296); MOZ_PretendNoReturn(); } } while (0); nsISupports* foundInterface
; if (TopThreeWordsEquals( aIID, (nsXPCOMCycleCollectionParticipant
::COMTypeInfo<nsXPCOMCycleCollectionParticipant, void>::
kIID), (nsCycleCollectionISupports::COMTypeInfo<nsCycleCollectionISupports
, void>::kIID)) && (LowWordEquals(aIID, (nsXPCOMCycleCollectionParticipant
::COMTypeInfo<nsXPCOMCycleCollectionParticipant, void>::
kIID)) || LowWordEquals(aIID, (nsCycleCollectionISupports::COMTypeInfo
<nsCycleCollectionISupports, void>::kIID)))) { if (LowWordEquals
(aIID, (nsXPCOMCycleCollectionParticipant::COMTypeInfo<nsXPCOMCycleCollectionParticipant
, void>::kIID))) { *aInstancePtr = OverOutElementsWrapper::
cycleCollection::GetParticipant(); return NS_OK; } if (LowWordEquals
(aIID, (nsCycleCollectionISupports::COMTypeInfo<nsCycleCollectionISupports
, void>::kIID))) { *aInstancePtr = OverOutElementsWrapper::
cycleCollection::Upcast(this); return NS_OK; } foundInterface
 = nullptr; } else
297  NS_INTERFACE_MAP_ENTRY(nsISupports)if (aIID.Equals(mozilla::detail::kImplementedIID<std::remove_reference_t
<decltype(*this)>, nsISupports>)) foundInterface = static_cast
<nsISupports*>(this); else
298NS_INTERFACE_MAP_ENDfoundInterface = 0; nsresult status; if (!foundInterface) { do
 { static_assert( mozilla::detail::AssertionConditionType<
decltype(!aIID.Equals((nsISupports::COMTypeInfo<nsISupports
, void>::kIID)))>::isValid, "invalid assertion condition"
); if ((__builtin_expect(!!(!(!!(!aIID.Equals((nsISupports::COMTypeInfo
<nsISupports, void>::kIID))))), 0))) { do { } while (false
); MOZ_ReportAssertionFailure("!aIID.Equals((nsISupports::COMTypeInfo<nsISupports, void>::kIID))"
, "/var/lib/jenkins/workspace/firefox-scan-build/dom/events/EventStateManager.cpp"
, 298); AnnotateMozCrashReason("MOZ_ASSERT" "(" "!aIID.Equals((nsISupports::COMTypeInfo<nsISupports, void>::kIID))"
 ")"); do { *((volatile int*)__null) = 298; __attribute__((nomerge
)) ::abort(); } while (false); } } while (false); status = NS_NOINTERFACE
; } else { (foundInterface)->AddRef(); status = NS_OK; } *
aInstancePtr = foundInterface; return status; }
299 
300already_AddRefed<nsIWidget> OverOutElementsWrapper::GetLastOverWidget() const {
301  nsCOMPtr<nsIWidget> widget = do_QueryReferent(mLastOverWidget);
302  return widget.forget();
303}
304 
305void OverOutElementsWrapper::ContentRemoved(nsIContent& aContent) {
306  if (!mDeepestEnterEventTarget) {
307    return;
308  }
309 
310  if (!nsContentUtils::ContentIsFlattenedTreeDescendantOf(
311          mDeepestEnterEventTarget, &aContent)) {
312    return;
313  }
314 
315  LogModule* const logModule = mType == BoundaryEventType::Mouse
316                                   ? sMouseBoundaryLog
317                                   : sPointerBoundaryLog;
318 
319  if (!StaticPrefs::
320          dom_events_mouse_pointer_boundary_keep_enter_targets_after_over_target_removed()) {
321    MOZ_LOG(logModule, LogLevel::Info,do { const ::mozilla::LogModule* moz_real_module = logModule;
 if ((__builtin_expect(!!(mozilla::detail::log_test(moz_real_module
, LogLevel::Info)), 0))) { mozilla::detail::log_print(moz_real_module
, LogLevel::Info, "The last \"over\" event target (%p) is removed"
, mDeepestEnterEventTarget.get()); } } while (0)
322            ("The last \"over\" event target (%p) is removed",do { const ::mozilla::LogModule* moz_real_module = logModule;
 if ((__builtin_expect(!!(mozilla::detail::log_test(moz_real_module
, LogLevel::Info)), 0))) { mozilla::detail::log_print(moz_real_module
, LogLevel::Info, "The last \"over\" event target (%p) is removed"
, mDeepestEnterEventTarget.get()); } } while (0)
323             mDeepestEnterEventTarget.get()))do { const ::mozilla::LogModule* moz_real_module = logModule;
 if ((__builtin_expect(!!(mozilla::detail::log_test(moz_real_module
, LogLevel::Info)), 0))) { mozilla::detail::log_print(moz_real_module
, LogLevel::Info, "The last \"over\" event target (%p) is removed"
, mDeepestEnterEventTarget.get()); } } while (0);
324    StoreOverEventTargetAndDeepestEnterEventTarget(nullptr);
325    return;
326  }
327 
328  if (mDispatchingOverEventTarget &&
329      (mDeepestEnterEventTarget == mDispatchingOverEventTarget ||
330       nsContentUtils::ContentIsFlattenedTreeDescendantOf(
331           mDispatchingOverEventTarget, &aContent))) {
332    if (mDispatchingOverEventTarget ==
333        mDispatchingOutOrDeepestLeaveEventTarget) {
334      MOZ_LOG(logModule, LogLevel::Info,do { const ::mozilla::LogModule* moz_real_module = logModule;
 if ((__builtin_expect(!!(mozilla::detail::log_test(moz_real_module
, LogLevel::Info)), 0))) { mozilla::detail::log_print(moz_real_module
, LogLevel::Info, "The dispatching \"%s\" event target (%p) is removed"
, LastOverEventTargetIsOutEventTarget() ? "out" : "leave", mDispatchingOutOrDeepestLeaveEventTarget
.get()); } } while (0)
335              ("The dispatching \"%s\" event target (%p) is removed",do { const ::mozilla::LogModule* moz_real_module = logModule;
 if ((__builtin_expect(!!(mozilla::detail::log_test(moz_real_module
, LogLevel::Info)), 0))) { mozilla::detail::log_print(moz_real_module
, LogLevel::Info, "The dispatching \"%s\" event target (%p) is removed"
, LastOverEventTargetIsOutEventTarget() ? "out" : "leave", mDispatchingOutOrDeepestLeaveEventTarget
.get()); } } while (0)
336               LastOverEventTargetIsOutEventTarget() ? "out" : "leave",do { const ::mozilla::LogModule* moz_real_module = logModule;
 if ((__builtin_expect(!!(mozilla::detail::log_test(moz_real_module
, LogLevel::Info)), 0))) { mozilla::detail::log_print(moz_real_module
, LogLevel::Info, "The dispatching \"%s\" event target (%p) is removed"
, LastOverEventTargetIsOutEventTarget() ? "out" : "leave", mDispatchingOutOrDeepestLeaveEventTarget
.get()); } } while (0)
337               mDispatchingOutOrDeepestLeaveEventTarget.get()))do { const ::mozilla::LogModule* moz_real_module = logModule;
 if ((__builtin_expect(!!(mozilla::detail::log_test(moz_real_module
, LogLevel::Info)), 0))) { mozilla::detail::log_print(moz_real_module
, LogLevel::Info, "The dispatching \"%s\" event target (%p) is removed"
, LastOverEventTargetIsOutEventTarget() ? "out" : "leave", mDispatchingOutOrDeepestLeaveEventTarget
.get()); } } while (0);
338      mDispatchingOutOrDeepestLeaveEventTarget = nullptr;
339    }
340    MOZ_LOG(logModule, LogLevel::Info,do { const ::mozilla::LogModule* moz_real_module = logModule;
 if ((__builtin_expect(!!(mozilla::detail::log_test(moz_real_module
, LogLevel::Info)), 0))) { mozilla::detail::log_print(moz_real_module
, LogLevel::Info, "The dispatching \"over\" event target (%p) is removed"
, mDispatchingOverEventTarget.get()); } } while (0)
341            ("The dispatching \"over\" event target (%p) is removed",do { const ::mozilla::LogModule* moz_real_module = logModule;
 if ((__builtin_expect(!!(mozilla::detail::log_test(moz_real_module
, LogLevel::Info)), 0))) { mozilla::detail::log_print(moz_real_module
, LogLevel::Info, "The dispatching \"over\" event target (%p) is removed"
, mDispatchingOverEventTarget.get()); } } while (0)
342             mDispatchingOverEventTarget.get()))do { const ::mozilla::LogModule* moz_real_module = logModule;
 if ((__builtin_expect(!!(mozilla::detail::log_test(moz_real_module
, LogLevel::Info)), 0))) { mozilla::detail::log_print(moz_real_module
, LogLevel::Info, "The dispatching \"over\" event target (%p) is removed"
, mDispatchingOverEventTarget.get()); } } while (0);
343    mDispatchingOverEventTarget = nullptr;
344  }
345  if (mDispatchingOutOrDeepestLeaveEventTarget &&
346      (mDeepestEnterEventTarget == mDispatchingOutOrDeepestLeaveEventTarget ||
347       nsContentUtils::ContentIsFlattenedTreeDescendantOf(
348           mDispatchingOutOrDeepestLeaveEventTarget, &aContent))) {
349    MOZ_LOG(logModule, LogLevel::Info,do { const ::mozilla::LogModule* moz_real_module = logModule;
 if ((__builtin_expect(!!(mozilla::detail::log_test(moz_real_module
, LogLevel::Info)), 0))) { mozilla::detail::log_print(moz_real_module
, LogLevel::Info, "The dispatching \"%s\" event target (%p) is removed"
, LastOverEventTargetIsOutEventTarget() ? "out" : "leave", mDispatchingOutOrDeepestLeaveEventTarget
.get()); } } while (0)
350            ("The dispatching \"%s\" event target (%p) is removed",do { const ::mozilla::LogModule* moz_real_module = logModule;
 if ((__builtin_expect(!!(mozilla::detail::log_test(moz_real_module
, LogLevel::Info)), 0))) { mozilla::detail::log_print(moz_real_module
, LogLevel::Info, "The dispatching \"%s\" event target (%p) is removed"
, LastOverEventTargetIsOutEventTarget() ? "out" : "leave", mDispatchingOutOrDeepestLeaveEventTarget
.get()); } } while (0)
351             LastOverEventTargetIsOutEventTarget() ? "out" : "leave",do { const ::mozilla::LogModule* moz_real_module = logModule;
 if ((__builtin_expect(!!(mozilla::detail::log_test(moz_real_module
, LogLevel::Info)), 0))) { mozilla::detail::log_print(moz_real_module
, LogLevel::Info, "The dispatching \"%s\" event target (%p) is removed"
, LastOverEventTargetIsOutEventTarget() ? "out" : "leave", mDispatchingOutOrDeepestLeaveEventTarget
.get()); } } while (0)
352             mDispatchingOutOrDeepestLeaveEventTarget.get()))do { const ::mozilla::LogModule* moz_real_module = logModule;
 if ((__builtin_expect(!!(mozilla::detail::log_test(moz_real_module
, LogLevel::Info)), 0))) { mozilla::detail::log_print(moz_real_module
, LogLevel::Info, "The dispatching \"%s\" event target (%p) is removed"
, LastOverEventTargetIsOutEventTarget() ? "out" : "leave", mDispatchingOutOrDeepestLeaveEventTarget
.get()); } } while (0);
353    mDispatchingOutOrDeepestLeaveEventTarget = nullptr;
354  }
355  MOZ_LOG(logModule, LogLevel::Info,do { const ::mozilla::LogModule* moz_real_module = logModule;
 if ((__builtin_expect(!!(mozilla::detail::log_test(moz_real_module
, LogLevel::Info)), 0))) { mozilla::detail::log_print(moz_real_module
, LogLevel::Info, "The last \"%s\" event target (%p) is removed and now the last "
 "deepest enter target becomes %s(%p)", LastOverEventTargetIsOutEventTarget
() ? "over" : "enter", mDeepestEnterEventTarget.get(), aContent
.GetFlattenedTreeParent() ? ToString(*aContent.GetFlattenedTreeParent
()).c_str() : "nullptr", aContent.GetFlattenedTreeParent()); }
 } while (0)
356          ("The last \"%s\" event target (%p) is removed and now the last "do { const ::mozilla::LogModule* moz_real_module = logModule;
 if ((__builtin_expect(!!(mozilla::detail::log_test(moz_real_module
, LogLevel::Info)), 0))) { mozilla::detail::log_print(moz_real_module
, LogLevel::Info, "The last \"%s\" event target (%p) is removed and now the last "
 "deepest enter target becomes %s(%p)", LastOverEventTargetIsOutEventTarget
() ? "over" : "enter", mDeepestEnterEventTarget.get(), aContent
.GetFlattenedTreeParent() ? ToString(*aContent.GetFlattenedTreeParent
()).c_str() : "nullptr", aContent.GetFlattenedTreeParent()); }
 } while (0)
357           "deepest enter target becomes %s(%p)",do { const ::mozilla::LogModule* moz_real_module = logModule;
 if ((__builtin_expect(!!(mozilla::detail::log_test(moz_real_module
, LogLevel::Info)), 0))) { mozilla::detail::log_print(moz_real_module
, LogLevel::Info, "The last \"%s\" event target (%p) is removed and now the last "
 "deepest enter target becomes %s(%p)", LastOverEventTargetIsOutEventTarget
() ? "over" : "enter", mDeepestEnterEventTarget.get(), aContent
.GetFlattenedTreeParent() ? ToString(*aContent.GetFlattenedTreeParent
()).c_str() : "nullptr", aContent.GetFlattenedTreeParent()); }
 } while (0)
358           LastOverEventTargetIsOutEventTarget() ? "over" : "enter",do { const ::mozilla::LogModule* moz_real_module = logModule;
 if ((__builtin_expect(!!(mozilla::detail::log_test(moz_real_module
, LogLevel::Info)), 0))) { mozilla::detail::log_print(moz_real_module
, LogLevel::Info, "The last \"%s\" event target (%p) is removed and now the last "
 "deepest enter target becomes %s(%p)", LastOverEventTargetIsOutEventTarget
() ? "over" : "enter", mDeepestEnterEventTarget.get(), aContent
.GetFlattenedTreeParent() ? ToString(*aContent.GetFlattenedTreeParent
()).c_str() : "nullptr", aContent.GetFlattenedTreeParent()); }
 } while (0)
359           mDeepestEnterEventTarget.get(),do { const ::mozilla::LogModule* moz_real_module = logModule;
 if ((__builtin_expect(!!(mozilla::detail::log_test(moz_real_module
, LogLevel::Info)), 0))) { mozilla::detail::log_print(moz_real_module
, LogLevel::Info, "The last \"%s\" event target (%p) is removed and now the last "
 "deepest enter target becomes %s(%p)", LastOverEventTargetIsOutEventTarget
() ? "over" : "enter", mDeepestEnterEventTarget.get(), aContent
.GetFlattenedTreeParent() ? ToString(*aContent.GetFlattenedTreeParent
()).c_str() : "nullptr", aContent.GetFlattenedTreeParent()); }
 } while (0)
360           aContent.GetFlattenedTreeParent()do { const ::mozilla::LogModule* moz_real_module = logModule;
 if ((__builtin_expect(!!(mozilla::detail::log_test(moz_real_module
, LogLevel::Info)), 0))) { mozilla::detail::log_print(moz_real_module
, LogLevel::Info, "The last \"%s\" event target (%p) is removed and now the last "
 "deepest enter target becomes %s(%p)", LastOverEventTargetIsOutEventTarget
() ? "over" : "enter", mDeepestEnterEventTarget.get(), aContent
.GetFlattenedTreeParent() ? ToString(*aContent.GetFlattenedTreeParent
()).c_str() : "nullptr", aContent.GetFlattenedTreeParent()); }
 } while (0)
361               ? ToString(*aContent.GetFlattenedTreeParent()).c_str()do { const ::mozilla::LogModule* moz_real_module = logModule;
 if ((__builtin_expect(!!(mozilla::detail::log_test(moz_real_module
, LogLevel::Info)), 0))) { mozilla::detail::log_print(moz_real_module
, LogLevel::Info, "The last \"%s\" event target (%p) is removed and now the last "
 "deepest enter target becomes %s(%p)", LastOverEventTargetIsOutEventTarget
() ? "over" : "enter", mDeepestEnterEventTarget.get(), aContent
.GetFlattenedTreeParent() ? ToString(*aContent.GetFlattenedTreeParent
()).c_str() : "nullptr", aContent.GetFlattenedTreeParent()); }
 } while (0)
362               : "nullptr",do { const ::mozilla::LogModule* moz_real_module = logModule;
 if ((__builtin_expect(!!(mozilla::detail::log_test(moz_real_module
, LogLevel::Info)), 0))) { mozilla::detail::log_print(moz_real_module
, LogLevel::Info, "The last \"%s\" event target (%p) is removed and now the last "
 "deepest enter target becomes %s(%p)", LastOverEventTargetIsOutEventTarget
() ? "over" : "enter", mDeepestEnterEventTarget.get(), aContent
.GetFlattenedTreeParent() ? ToString(*aContent.GetFlattenedTreeParent
()).c_str() : "nullptr", aContent.GetFlattenedTreeParent()); }
 } while (0)
363           aContent.GetFlattenedTreeParent()))do { const ::mozilla::LogModule* moz_real_module = logModule;
 if ((__builtin_expect(!!(mozilla::detail::log_test(moz_real_module
, LogLevel::Info)), 0))) { mozilla::detail::log_print(moz_real_module
, LogLevel::Info, "The last \"%s\" event target (%p) is removed and now the last "
 "deepest enter target becomes %s(%p)", LastOverEventTargetIsOutEventTarget
() ? "over" : "enter", mDeepestEnterEventTarget.get(), aContent
.GetFlattenedTreeParent() ? ToString(*aContent.GetFlattenedTreeParent
()).c_str() : "nullptr", aContent.GetFlattenedTreeParent()); }
 } while (0);
364  UpdateDeepestEnterEventTarget(aContent.GetFlattenedTreeParent());
365}
366 
367void OverOutElementsWrapper::TryToRestorePendingRemovedOverTarget(
368    const WidgetEvent* aEvent) {
369  if (!MaybeHasPendingRemovingOverEventTarget()) {
370    return;
371  }
372 
373  LogModule* const logModule = mType == BoundaryEventType::Mouse
374                                   ? sMouseBoundaryLog
375                                   : sPointerBoundaryLog;
376 
377  // If we receive a mouse event immediately, let's try to restore the last
378  // "over" event target as the following "out" event target.  We assume that a
379  // synthesized mousemove or another mouse event is being dispatched at latest
380  // the next animation frame from the removal.  However, synthesized mouse move
381  // which is enqueued by ContentRemoved() may not sent to this instance because
382  // the target is considered with the latest layout, so the document of this
383  // instance may be moved somewhere before the next animation frame.
384  // Therefore, we should not restore the last "over" target if we receive an
385  // unexpected event like a keyboard event, a wheel event, etc.
386  if (aEvent->AsMouseEvent()) {
387    // Restore the original "over" event target should be allowed only when it's
388    // reconnected under the last deepest "enter" event target because we need
389    // to dispatch "leave" events later at least on the ancestors which have
390    // never been removed from the tree.
391    // XXX If new ancestor is inserted between mDeepestEnterEventTarget and
392    // mPendingToRemoveLastOverEventTarget, we will dispatch "leave" event even
393    // though we have not dispatched "enter" event on the element.  For fixing
394    // this, we need to store the full path of the last "out" event target when
395    // it's removed from the tree.  I guess we can be relax for this issue
396    // because this hack is required for web apps which reconnect the target
397    // to the same position immediately.
398    // XXX Should be IsInclusiveFlatTreeDescendantOf()?  However, it may
399    // be reconnected into a subtree which is different from where the
400    // last over element was.
401    nsCOMPtr<nsIContent> pendingRemovingOverEventTarget =
402        GetPendingRemovingOverEventTarget();
403    if (pendingRemovingOverEventTarget &&
404        pendingRemovingOverEventTarget->IsInclusiveDescendantOf(
405            mDeepestEnterEventTarget)) {
406      // StoreOverEventTargetAndDeepestEnterEventTarget() always resets
407      // mLastOverWidget.  When we restore the pending removing "over" event
408      // target, we need to keep storing the original "over" widget too.
409      nsCOMPtr<nsIWeakReference> widget = std::move(mLastOverWidget);
410      StoreOverEventTargetAndDeepestEnterEventTarget(
411          pendingRemovingOverEventTarget);
412      mLastOverWidget = std::move(widget);
413      MOZ_LOG(logModule, LogLevel::Info,do { const ::mozilla::LogModule* moz_real_module = logModule;
 if ((__builtin_expect(!!(mozilla::detail::log_test(moz_real_module
, LogLevel::Info)), 0))) { mozilla::detail::log_print(moz_real_module
, LogLevel::Info, "The \"over\" event target (%p) is restored"
, mDeepestEnterEventTarget.get()); } } while (0)
414              ("The \"over\" event target (%p) is restored",do { const ::mozilla::LogModule* moz_real_module = logModule;
 if ((__builtin_expect(!!(mozilla::detail::log_test(moz_real_module
, LogLevel::Info)), 0))) { mozilla::detail::log_print(moz_real_module
, LogLevel::Info, "The \"over\" event target (%p) is restored"
, mDeepestEnterEventTarget.get()); } } while (0)
415               mDeepestEnterEventTarget.get()))do { const ::mozilla::LogModule* moz_real_module = logModule;
 if ((__builtin_expect(!!(mozilla::detail::log_test(moz_real_module
, LogLevel::Info)), 0))) { mozilla::detail::log_print(moz_real_module
, LogLevel::Info, "The \"over\" event target (%p) is restored"
, mDeepestEnterEventTarget.get()); } } while (0);
416      return;
417    }
418    MOZ_LOG(logModule, LogLevel::Debug,do { const ::mozilla::LogModule* moz_real_module = logModule;
 if ((__builtin_expect(!!(mozilla::detail::log_test(moz_real_module
, LogLevel::Debug)), 0))) { mozilla::detail::log_print(moz_real_module
, LogLevel::Debug, "Forgetting the last \"over\" event target (%p) because it is not "
 "reconnected under the deepest enter event target (%p)", mPendingRemovingOverEventTarget
.get(), mDeepestEnterEventTarget.get()); } } while (0)
419            ("Forgetting the last \"over\" event target (%p) because it is not "do { const ::mozilla::LogModule* moz_real_module = logModule;
 if ((__builtin_expect(!!(mozilla::detail::log_test(moz_real_module
, LogLevel::Debug)), 0))) { mozilla::detail::log_print(moz_real_module
, LogLevel::Debug, "Forgetting the last \"over\" event target (%p) because it is not "
 "reconnected under the deepest enter event target (%p)", mPendingRemovingOverEventTarget
.get(), mDeepestEnterEventTarget.get()); } } while (0)
420             "reconnected under the deepest enter event target (%p)",do { const ::mozilla::LogModule* moz_real_module = logModule;
 if ((__builtin_expect(!!(mozilla::detail::log_test(moz_real_module
, LogLevel::Debug)), 0))) { mozilla::detail::log_print(moz_real_module
, LogLevel::Debug, "Forgetting the last \"over\" event target (%p) because it is not "
 "reconnected under the deepest enter event target (%p)", mPendingRemovingOverEventTarget
.get(), mDeepestEnterEventTarget.get()); } } while (0)
421             mPendingRemovingOverEventTarget.get(),do { const ::mozilla::LogModule* moz_real_module = logModule;
 if ((__builtin_expect(!!(mozilla::detail::log_test(moz_real_module
, LogLevel::Debug)), 0))) { mozilla::detail::log_print(moz_real_module
, LogLevel::Debug, "Forgetting the last \"over\" event target (%p) because it is not "
 "reconnected under the deepest enter event target (%p)", mPendingRemovingOverEventTarget
.get(), mDeepestEnterEventTarget.get()); } } while (0)
422             mDeepestEnterEventTarget.get()))do { const ::mozilla::LogModule* moz_real_module = logModule;
 if ((__builtin_expect(!!(mozilla::detail::log_test(moz_real_module
, LogLevel::Debug)), 0))) { mozilla::detail::log_print(moz_real_module
, LogLevel::Debug, "Forgetting the last \"over\" event target (%p) because it is not "
 "reconnected under the deepest enter event target (%p)", mPendingRemovingOverEventTarget
.get(), mDeepestEnterEventTarget.get()); } } while (0);
423  } else {
424    MOZ_LOG(logModule, LogLevel::Debug,do { const ::mozilla::LogModule* moz_real_module = logModule;
 if ((__builtin_expect(!!(mozilla::detail::log_test(moz_real_module
, LogLevel::Debug)), 0))) { mozilla::detail::log_print(moz_real_module
, LogLevel::Debug, "Forgetting the last \"over\" event target (%p) because an "
 "unexpected event (%s) is being dispatched, that means that "
 "EventStateManager didn't receive a synthesized mousemove which "
 "should be dispatched at next animation frame from the removal"
, mPendingRemovingOverEventTarget.get(), ToChar(aEvent->mMessage
)); } } while (0)
425            ("Forgetting the last \"over\" event target (%p) because an "do { const ::mozilla::LogModule* moz_real_module = logModule;
 if ((__builtin_expect(!!(mozilla::detail::log_test(moz_real_module
, LogLevel::Debug)), 0))) { mozilla::detail::log_print(moz_real_module
, LogLevel::Debug, "Forgetting the last \"over\" event target (%p) because an "
 "unexpected event (%s) is being dispatched, that means that "
 "EventStateManager didn't receive a synthesized mousemove which "
 "should be dispatched at next animation frame from the removal"
, mPendingRemovingOverEventTarget.get(), ToChar(aEvent->mMessage
)); } } while (0)
426             "unexpected event (%s) is being dispatched, that means that "do { const ::mozilla::LogModule* moz_real_module = logModule;
 if ((__builtin_expect(!!(mozilla::detail::log_test(moz_real_module
, LogLevel::Debug)), 0))) { mozilla::detail::log_print(moz_real_module
, LogLevel::Debug, "Forgetting the last \"over\" event target (%p) because an "
 "unexpected event (%s) is being dispatched, that means that "
 "EventStateManager didn't receive a synthesized mousemove which "
 "should be dispatched at next animation frame from the removal"
, mPendingRemovingOverEventTarget.get(), ToChar(aEvent->mMessage
)); } } while (0)
427             "EventStateManager didn't receive a synthesized mousemove which "do { const ::mozilla::LogModule* moz_real_module = logModule;
 if ((__builtin_expect(!!(mozilla::detail::log_test(moz_real_module
, LogLevel::Debug)), 0))) { mozilla::detail::log_print(moz_real_module
, LogLevel::Debug, "Forgetting the last \"over\" event target (%p) because an "
 "unexpected event (%s) is being dispatched, that means that "
 "EventStateManager didn't receive a synthesized mousemove which "
 "should be dispatched at next animation frame from the removal"
, mPendingRemovingOverEventTarget.get(), ToChar(aEvent->mMessage
)); } } while (0)
428             "should be dispatched at next animation frame from the removal",do { const ::mozilla::LogModule* moz_real_module = logModule;
 if ((__builtin_expect(!!(mozilla::detail::log_test(moz_real_module
, LogLevel::Debug)), 0))) { mozilla::detail::log_print(moz_real_module
, LogLevel::Debug, "Forgetting the last \"over\" event target (%p) because an "
 "unexpected event (%s) is being dispatched, that means that "
 "EventStateManager didn't receive a synthesized mousemove which "
 "should be dispatched at next animation frame from the removal"
, mPendingRemovingOverEventTarget.get(), ToChar(aEvent->mMessage
)); } } while (0)
429             mPendingRemovingOverEventTarget.get(), ToChar(aEvent->mMessage)))do { const ::mozilla::LogModule* moz_real_module = logModule;
 if ((__builtin_expect(!!(mozilla::detail::log_test(moz_real_module
, LogLevel::Debug)), 0))) { mozilla::detail::log_print(moz_real_module
, LogLevel::Debug, "Forgetting the last \"over\" event target (%p) because an "
 "unexpected event (%s) is being dispatched, that means that "
 "EventStateManager didn't receive a synthesized mousemove which "
 "should be dispatched at next animation frame from the removal"
, mPendingRemovingOverEventTarget.get(), ToChar(aEvent->mMessage
)); } } while (0);
430  }
431 
432  // Now, we should not restore mPendingRemovingOverEventTarget to
433  // mDeepestEnterEventTarget anymore since mPendingRemovingOverEventTarget was
434  // moved outside the subtree of mDeepestEnterEventTarget.
435  mPendingRemovingOverEventTarget = nullptr;
436}
437 
438void OverOutElementsWrapper::WillDispatchOverAndEnterEvent(
439    nsIContent* aOverEventTarget) {
440  StoreOverEventTargetAndDeepestEnterEventTarget(aOverEventTarget);
441  // Store the first "over" event target we fire and don't refire "over" event
442  // to that element while the first "over" event is still ongoing.
443  mDispatchingOverEventTarget = aOverEventTarget;
444}
445 
446void OverOutElementsWrapper::DidDispatchOverAndEnterEvent(
447    nsIContent* aOriginalOverTargetInComposedDoc,
448    nsIWidget* aOverEventTargetWidget) {
449  mDispatchingOverEventTarget = nullptr;
450  mLastOverWidget = do_GetWeakReference(aOverEventTargetWidget);
451 
452  // Pointer Events define that once the `pointerover` event target is removed
453  // from the tree, `pointerout` should not be fired on that and the closest
454  // connected ancestor at the target removal should be kept as the deepest
455  // `pointerleave` target.  Therefore, we don't need the special handling for
456  // `pointerout` event target if the last `pointerover` target is temporarily
457  // removed from the tree.
458  if (mType == OverOutElementsWrapper::BoundaryEventType::Pointer) {
459    return;
460  }
461 
462  // Assume that the caller checks whether aOriginalOverTarget is in the
463  // original document.  If we don't enable the strict mouse/pointer event
464  // boundary event dispatching by the pref (see below),
465  // mDeepestEnterEventTarget is set to nullptr when the last "over" target is
466  // removed.  Therefore, we cannot check whether aOriginalOverTarget is in the
467  // original document here.
468  if (!aOriginalOverTargetInComposedDoc) {
469    return;
470  }
471  MOZ_ASSERT_IF(mDeepestEnterEventTarget,do { if (mDeepestEnterEventTarget) { do { static_assert( mozilla
::detail::AssertionConditionType<decltype(mDeepestEnterEventTarget
->GetComposedDoc() == aOriginalOverTargetInComposedDoc->
GetComposedDoc())>::isValid, "invalid assertion condition"
); if ((__builtin_expect(!!(!(!!(mDeepestEnterEventTarget->
GetComposedDoc() == aOriginalOverTargetInComposedDoc->GetComposedDoc
()))), 0))) { do { } while (false); MOZ_ReportAssertionFailure
("mDeepestEnterEventTarget->GetComposedDoc() == aOriginalOverTargetInComposedDoc->GetComposedDoc()"
, "/var/lib/jenkins/workspace/firefox-scan-build/dom/events/EventStateManager.cpp"
, 473); AnnotateMozCrashReason("MOZ_ASSERT" "(" "mDeepestEnterEventTarget->GetComposedDoc() == aOriginalOverTargetInComposedDoc->GetComposedDoc()"
 ")"); do { *((volatile int*)__null) = 473; __attribute__((nomerge
)) ::abort(); } while (false); } } while (false); } } while (
false)
472                mDeepestEnterEventTarget->GetComposedDoc() ==do { if (mDeepestEnterEventTarget) { do { static_assert( mozilla
::detail::AssertionConditionType<decltype(mDeepestEnterEventTarget
->GetComposedDoc() == aOriginalOverTargetInComposedDoc->
GetComposedDoc())>::isValid, "invalid assertion condition"
); if ((__builtin_expect(!!(!(!!(mDeepestEnterEventTarget->
GetComposedDoc() == aOriginalOverTargetInComposedDoc->GetComposedDoc
()))), 0))) { do { } while (false); MOZ_ReportAssertionFailure
("mDeepestEnterEventTarget->GetComposedDoc() == aOriginalOverTargetInComposedDoc->GetComposedDoc()"
, "/var/lib/jenkins/workspace/firefox-scan-build/dom/events/EventStateManager.cpp"
, 473); AnnotateMozCrashReason("MOZ_ASSERT" "(" "mDeepestEnterEventTarget->GetComposedDoc() == aOriginalOverTargetInComposedDoc->GetComposedDoc()"
 ")"); do { *((volatile int*)__null) = 473; __attribute__((nomerge
)) ::abort(); } while (false); } } while (false); } } while (
false)
473                    aOriginalOverTargetInComposedDoc->GetComposedDoc())do { if (mDeepestEnterEventTarget) { do { static_assert( mozilla
::detail::AssertionConditionType<decltype(mDeepestEnterEventTarget
->GetComposedDoc() == aOriginalOverTargetInComposedDoc->
GetComposedDoc())>::isValid, "invalid assertion condition"
); if ((__builtin_expect(!!(!(!!(mDeepestEnterEventTarget->
GetComposedDoc() == aOriginalOverTargetInComposedDoc->GetComposedDoc
()))), 0))) { do { } while (false); MOZ_ReportAssertionFailure
("mDeepestEnterEventTarget->GetComposedDoc() == aOriginalOverTargetInComposedDoc->GetComposedDoc()"
, "/var/lib/jenkins/workspace/firefox-scan-build/dom/events/EventStateManager.cpp"
, 473); AnnotateMozCrashReason("MOZ_ASSERT" "(" "mDeepestEnterEventTarget->GetComposedDoc() == aOriginalOverTargetInComposedDoc->GetComposedDoc()"
 ")"); do { *((volatile int*)__null) = 473; __attribute__((nomerge
)) ::abort(); } while (false); } } while (false); } } while (
false);
474  // If the "mouseover" event target is removed temporarily while we're
475  // dispatching "mouseover" and "mouseenter" events and the target gets back
476  // under the deepest enter event target, we should restore the "mouseover"
477  // target.
478  if ((!StaticPrefs::
479           dom_events_mouse_pointer_boundary_keep_enter_targets_after_over_target_removed() &&
480       !mDeepestEnterEventTarget) ||
481      (!LastOverEventTargetIsOutEventTarget() && mDeepestEnterEventTarget &&
482       nsContentUtils::ContentIsFlattenedTreeDescendantOf(
483           aOriginalOverTargetInComposedDoc, mDeepestEnterEventTarget))) {
484    StoreOverEventTargetAndDeepestEnterEventTarget(
485        aOriginalOverTargetInComposedDoc);
486    LogModule* const logModule = mType == BoundaryEventType::Mouse
487                                     ? sMouseBoundaryLog
488                                     : sPointerBoundaryLog;
489    MOZ_LOG(logModule, LogLevel::Info,do { const ::mozilla::LogModule* moz_real_module = logModule;
 if ((__builtin_expect(!!(mozilla::detail::log_test(moz_real_module
, LogLevel::Info)), 0))) { mozilla::detail::log_print(moz_real_module
, LogLevel::Info, "The \"over\" event target (%p) is restored"
, mDeepestEnterEventTarget.get()); } } while (0)
490            ("The \"over\" event target (%p) is restored",do { const ::mozilla::LogModule* moz_real_module = logModule;
 if ((__builtin_expect(!!(mozilla::detail::log_test(moz_real_module
, LogLevel::Info)), 0))) { mozilla::detail::log_print(moz_real_module
, LogLevel::Info, "The \"over\" event target (%p) is restored"
, mDeepestEnterEventTarget.get()); } } while (0)
491             mDeepestEnterEventTarget.get()))do { const ::mozilla::LogModule* moz_real_module = logModule;
 if ((__builtin_expect(!!(mozilla::detail::log_test(moz_real_module
, LogLevel::Info)), 0))) { mozilla::detail::log_print(moz_real_module
, LogLevel::Info, "The \"over\" event target (%p) is restored"
, mDeepestEnterEventTarget.get()); } } while (0);
492  }
493}
494 
495void OverOutElementsWrapper::StoreOverEventTargetAndDeepestEnterEventTarget(
496    nsIContent* aOverEventTargetAndDeepestEnterEventTarget) {
497  mDeepestEnterEventTarget = aOverEventTargetAndDeepestEnterEventTarget;
498  mPendingRemovingOverEventTarget = nullptr;
499  mDeepestEnterEventTargetIsOverEventTarget = !!mDeepestEnterEventTarget;
500  mLastOverWidget = nullptr;  // Set it after dispatching the "over" event.
501}
502 
503void OverOutElementsWrapper::UpdateDeepestEnterEventTarget(
504    nsIContent* aDeepestEnterEventTarget) {
505  if (MOZ_UNLIKELY(mDeepestEnterEventTarget == aDeepestEnterEventTarget)(__builtin_expect(!!(mDeepestEnterEventTarget == aDeepestEnterEventTarget
), 0))) {
506    return;
507  }
508 
509  if (!aDeepestEnterEventTarget) {
510    // If the root element is removed, we don't need to dispatch "leave"
511    // events on any elements.  Therefore, we can forget everything.
512    StoreOverEventTargetAndDeepestEnterEventTarget(nullptr);
513    return;
514  }
515 
516  if (LastOverEventTargetIsOutEventTarget()) {
517    MOZ_ASSERT(mDeepestEnterEventTarget)do { static_assert( mozilla::detail::AssertionConditionType<
decltype(mDeepestEnterEventTarget)>::isValid, "invalid assertion condition"
); if ((__builtin_expect(!!(!(!!(mDeepestEnterEventTarget))),
 0))) { do { } while (false); MOZ_ReportAssertionFailure("mDeepestEnterEventTarget"
, "/var/lib/jenkins/workspace/firefox-scan-build/dom/events/EventStateManager.cpp"
, 517); AnnotateMozCrashReason("MOZ_ASSERT" "(" "mDeepestEnterEventTarget"
 ")"); do { *((volatile int*)__null) = 517; __attribute__((nomerge
)) ::abort(); } while (false); } } while (false);
518    if (mType == BoundaryEventType::Pointer) {
519      // The spec of Pointer Events defines that once the `pointerover` event
520      // target is removed from the tree, `pointerout` should not be fired on
521      // that and the closest connected ancestor at the target removal should be
522      // kept as the deepest `pointerleave` target.  All browsers considers the
523      // last `pointerover` event target is removed immediately when it occurs.
524      // Therefore, we don't need the special handling which we do for the
525      // `mouseout` event target below for considering whether we'll dispatch
526      // `pointerout` on the last `pointerover` target.
527      mPendingRemovingOverEventTarget = nullptr;
528    } else {
529      // Now, the `mouseout` event target is removed from the DOM at least
530      // temporarily.  Let's keep storing it for restoring it if it's
531      // reconnected into mDeepestEnterEventTarget in a tick because the other
532      // browsers do not treat temporary removal of the last `mouseover` target
533      // keeps storing it as the next `mouseout` event target.
534      MOZ_ASSERT(!mPendingRemovingOverEventTarget)do { static_assert( mozilla::detail::AssertionConditionType<
decltype(!mPendingRemovingOverEventTarget)>::isValid, "invalid assertion condition"
); if ((__builtin_expect(!!(!(!!(!mPendingRemovingOverEventTarget
))), 0))) { do { } while (false); MOZ_ReportAssertionFailure(
"!mPendingRemovingOverEventTarget", "/var/lib/jenkins/workspace/firefox-scan-build/dom/events/EventStateManager.cpp"
, 534); AnnotateMozCrashReason("MOZ_ASSERT" "(" "!mPendingRemovingOverEventTarget"
 ")"); do { *((volatile int*)__null) = 534; __attribute__((nomerge
)) ::abort(); } while (false); } } while (false);
535      MOZ_ASSERT(mDeepestEnterEventTarget)do { static_assert( mozilla::detail::AssertionConditionType<
decltype(mDeepestEnterEventTarget)>::isValid, "invalid assertion condition"
); if ((__builtin_expect(!!(!(!!(mDeepestEnterEventTarget))),
 0))) { do { } while (false); MOZ_ReportAssertionFailure("mDeepestEnterEventTarget"
, "/var/lib/jenkins/workspace/firefox-scan-build/dom/events/EventStateManager.cpp"
, 535); AnnotateMozCrashReason("MOZ_ASSERT" "(" "mDeepestEnterEventTarget"
 ")"); do { *((volatile int*)__null) = 535; __attribute__((nomerge
)) ::abort(); } while (false); } } while (false);
536      mPendingRemovingOverEventTarget =
537          do_GetWeakReference(mDeepestEnterEventTarget);
538    }
539  } else {
540    MOZ_ASSERT(!mDeepestEnterEventTargetIsOverEventTarget)do { static_assert( mozilla::detail::AssertionConditionType<
decltype(!mDeepestEnterEventTargetIsOverEventTarget)>::isValid
, "invalid assertion condition"); if ((__builtin_expect(!!(!(
!!(!mDeepestEnterEventTargetIsOverEventTarget))), 0))) { do {
 } while (false); MOZ_ReportAssertionFailure("!mDeepestEnterEventTargetIsOverEventTarget"
, "/var/lib/jenkins/workspace/firefox-scan-build/dom/events/EventStateManager.cpp"
, 540); AnnotateMozCrashReason("MOZ_ASSERT" "(" "!mDeepestEnterEventTargetIsOverEventTarget"
 ")"); do { *((volatile int*)__null) = 540; __attribute__((nomerge
)) ::abort(); } while (false); } } while (false);
541    // If mDeepestEnterEventTarget is not the last "over" event target, we've
542    // already done the complicated state managing above.  Therefore, we only
543    // need to update mDeepestEnterEventTarget in this case.
544  }
545  mDeepestEnterEventTarget = aDeepestEnterEventTarget;
546  mDeepestEnterEventTargetIsOverEventTarget = false;
547  // Do not update mLastOverWidget here because it's required to ignore some
548  // following pointer events which are fired on widget under different top
549  // level widget.
550}
551 
552/******************************************************************/
553/* mozilla::EventStateManager                                     */
554/******************************************************************/
555 
556static uint32_t sESMInstanceCount = 0;
557 
558bool EventStateManager::sNormalLMouseEventInProcess = false;
559int16_t EventStateManager::sCurrentMouseBtn = MouseButton::eNotPressed;
560EventStateManager* EventStateManager::sActiveESM = nullptr;
561EventStateManager* EventStateManager::sCursorSettingManager = nullptr;
562AutoWeakFrame EventStateManager::sLastDragOverFrame = nullptr;
563LayoutDeviceIntPoint EventStateManager::sPreLockScreenPoint =
564    LayoutDeviceIntPoint(0, 0);
565LayoutDeviceIntPoint EventStateManager::sLastRefPoint = kInvalidRefPoint;
566CSSIntPoint EventStateManager::sLastScreenPoint = CSSIntPoint(0, 0);
567LayoutDeviceIntPoint EventStateManager::sSynthCenteringPoint = kInvalidRefPoint;
568CSSIntPoint EventStateManager::sLastClientPoint = CSSIntPoint(0, 0);
569nsCOMPtr<nsIContent> EventStateManager::sDragOverContent = nullptr;
570 
571EventStateManager::WheelPrefs* EventStateManager::WheelPrefs::sInstance =
572    nullptr;
573EventStateManager::DeltaAccumulator*
574    EventStateManager::DeltaAccumulator::sInstance = nullptr;
575 
576constexpr const StyleCursorKind kInvalidCursorKind =
577    static_cast<StyleCursorKind>(255);
578 
579EventStateManager::EventStateManager()
580    : mLockCursor(kInvalidCursorKind),
581      mCurrentTarget(nullptr),
582      // init d&d gesture state machine variables
583      mGestureDownPoint(0, 0),
584      mGestureModifiers(0),
585      mGestureDownButtons(0),
586      mGestureDownButton(0),
587      mPresContext(nullptr),
588      mShouldAlwaysUseLineDeltas(false),
589      mShouldAlwaysUseLineDeltasInitialized(false),
590      mGestureDownInTextControl(false),
591      mInTouchDrag(false),
592      m_haveShutdown(false) {
593  if (sESMInstanceCount == 0) {
594    gUserInteractionTimerCallback = new UITimerCallback();
595    if (gUserInteractionTimerCallback) NS_ADDREF(gUserInteractionTimerCallback)(gUserInteractionTimerCallback)->AddRef();
596    UpdateUserActivityTimer();
597  }
598  ++sESMInstanceCount;
599}
600 
601nsresult EventStateManager::UpdateUserActivityTimer() {
602  if (!gUserInteractionTimerCallback) return NS_OK;
603 
604  if (!gUserInteractionTimer) {
605    gUserInteractionTimer = NS_NewTimer().take();
606  }
607 
608  if (gUserInteractionTimer) {
609    gUserInteractionTimer->InitWithCallback(
610        gUserInteractionTimerCallback,
611        StaticPrefs::dom_events_user_interaction_interval(),
612        nsITimer::TYPE_ONE_SHOT);
613  }
614  return NS_OK;
615}
616 
617nsresult EventStateManager::Init() {
618  nsCOMPtr<nsIObserverService> observerService =
619      mozilla::services::GetObserverService();
620  if (!observerService) return NS_ERROR_FAILURE;
621 
622  observerService->AddObserver(this, NS_XPCOM_SHUTDOWN_OBSERVER_ID"xpcom-shutdown", true);
623 
624  return NS_OK;
625}
626 
627bool EventStateManager::ShouldAlwaysUseLineDeltas() {
628  if (MOZ_UNLIKELY(!mShouldAlwaysUseLineDeltasInitialized)(__builtin_expect(!!(!mShouldAlwaysUseLineDeltasInitialized),
 0))) {
629    mShouldAlwaysUseLineDeltasInitialized = true;
630    mShouldAlwaysUseLineDeltas =
631        !StaticPrefs::dom_event_wheel_deltaMode_lines_disabled();
632    if (!mShouldAlwaysUseLineDeltas && mDocument) {
633      if (nsIPrincipal* principal =
634              mDocument->GetPrincipalForPrefBasedHacks()) {
635        mShouldAlwaysUseLineDeltas = principal->IsURIInPrefList(
636            "dom.event.wheel-deltaMode-lines.always-enabled");
637      }
638    }
639  }
640  return mShouldAlwaysUseLineDeltas;
641}
642 
643EventStateManager::~EventStateManager() {
644  ReleaseCurrentIMEContentObserver();
645 
646  if (sActiveESM == this) {
647    sActiveESM = nullptr;
648  }
649 
650  if (StaticPrefs::ui_click_hold_context_menus()) {
651    KillClickHoldTimer();
652  }
653 
654  if (sCursorSettingManager == this) {
655    sCursorSettingManager = nullptr;
656  }
657 
658  --sESMInstanceCount;
659  if (sESMInstanceCount == 0) {
660    WheelTransaction::Shutdown();
661    if (gUserInteractionTimerCallback) {
662      gUserInteractionTimerCallback->Notify(nullptr);
663      NS_RELEASE(gUserInteractionTimerCallback)do { (gUserInteractionTimerCallback)->Release(); (gUserInteractionTimerCallback
) = 0; } while (0);
664    }
665    if (gUserInteractionTimer) {
666      gUserInteractionTimer->Cancel();
667      NS_RELEASE(gUserInteractionTimer)do { (gUserInteractionTimer)->Release(); (gUserInteractionTimer
) = 0; } while (0);
668    }
669    WheelPrefs::Shutdown();
670    DeltaAccumulator::Shutdown();
671  }
672 
673  if (sDragOverContent && sDragOverContent->OwnerDoc() == mDocument) {
674    sDragOverContent = nullptr;
675  }
676 
677  if (!m_haveShutdown) {
678    Shutdown();
679 
680    // Don't remove from Observer service in Shutdown because Shutdown also
681    // gets called from xpcom shutdown observer.  And we don't want to remove
682    // from the service in that case.
683 
684    nsCOMPtr<nsIObserverService> observerService =
685        mozilla::services::GetObserverService();
686    if (observerService) {
687      observerService->RemoveObserver(this, NS_XPCOM_SHUTDOWN_OBSERVER_ID"xpcom-shutdown");
688    }
689  }
690}
691 
692nsresult EventStateManager::Shutdown() {
693  m_haveShutdown = true;
694  return NS_OK;
695}
696 
697NS_IMETHODIMPnsresult
698EventStateManager::Observe(nsISupports* aSubject, const char* aTopic,
699                           const char16_t* someData) {
700  if (!nsCRT::strcmp(aTopic, NS_XPCOM_SHUTDOWN_OBSERVER_ID"xpcom-shutdown")) {
701    Shutdown();
702  }
703 
704  return NS_OK;
705}
706 
707NS_INTERFACE_MAP_BEGIN_CYCLE_COLLECTION(EventStateManager)nsresult EventStateManager::QueryInterface(const nsIID& aIID
, void** aInstancePtr) { do { if (!(aInstancePtr)) { NS_DebugBreak
(NS_DEBUG_ASSERTION, "QueryInterface requires a non-NULL destination!"
, "aInstancePtr", "/var/lib/jenkins/workspace/firefox-scan-build/dom/events/EventStateManager.cpp"
, 707); MOZ_PretendNoReturn(); } } while (0); nsISupports* foundInterface
; if (TopThreeWordsEquals( aIID, (nsXPCOMCycleCollectionParticipant
::COMTypeInfo<nsXPCOMCycleCollectionParticipant, void>::
kIID), (nsCycleCollectionISupports::COMTypeInfo<nsCycleCollectionISupports
, void>::kIID)) && (LowWordEquals(aIID, (nsXPCOMCycleCollectionParticipant
::COMTypeInfo<nsXPCOMCycleCollectionParticipant, void>::
kIID)) || LowWordEquals(aIID, (nsCycleCollectionISupports::COMTypeInfo
<nsCycleCollectionISupports, void>::kIID)))) { if (LowWordEquals
(aIID, (nsXPCOMCycleCollectionParticipant::COMTypeInfo<nsXPCOMCycleCollectionParticipant
, void>::kIID))) { *aInstancePtr = EventStateManager::cycleCollection
::GetParticipant(); return NS_OK; } if (LowWordEquals(aIID, (
nsCycleCollectionISupports::COMTypeInfo<nsCycleCollectionISupports
, void>::kIID))) { *aInstancePtr = EventStateManager::cycleCollection
::Upcast(this); return NS_OK; } foundInterface = nullptr; } else
708  NS_INTERFACE_MAP_ENTRY_AMBIGUOUS(nsISupports, nsIObserver)if (aIID.Equals(mozilla::detail::kImplementedIID<std::remove_reference_t
<decltype(*this)>, nsISupports>)) foundInterface = static_cast
<nsISupports*>(static_cast<nsIObserver*>(this)); else
709  NS_INTERFACE_MAP_ENTRY(nsIObserver)if (aIID.Equals(mozilla::detail::kImplementedIID<std::remove_reference_t
<decltype(*this)>, nsIObserver>)) foundInterface = static_cast
<nsIObserver*>(this); else
710  NS_INTERFACE_MAP_ENTRY(nsISupportsWeakReference)if (aIID.Equals(mozilla::detail::kImplementedIID<std::remove_reference_t
<decltype(*this)>, nsISupportsWeakReference>)) foundInterface
 = static_cast<nsISupportsWeakReference*>(this); else
711NS_INTERFACE_MAP_ENDfoundInterface = 0; nsresult status; if (!foundInterface) { do
 { static_assert( mozilla::detail::AssertionConditionType<
decltype(!aIID.Equals((nsISupports::COMTypeInfo<nsISupports
, void>::kIID)))>::isValid, "invalid assertion condition"
); if ((__builtin_expect(!!(!(!!(!aIID.Equals((nsISupports::COMTypeInfo
<nsISupports, void>::kIID))))), 0))) { do { } while (false
); MOZ_ReportAssertionFailure("!aIID.Equals((nsISupports::COMTypeInfo<nsISupports, void>::kIID))"
, "/var/lib/jenkins/workspace/firefox-scan-build/dom/events/EventStateManager.cpp"
, 711); AnnotateMozCrashReason("MOZ_ASSERT" "(" "!aIID.Equals((nsISupports::COMTypeInfo<nsISupports, void>::kIID))"
 ")"); do { *((volatile int*)__null) = 711; __attribute__((nomerge
)) ::abort(); } while (false); } } while (false); status = NS_NOINTERFACE
; } else { (foundInterface)->AddRef(); status = NS_OK; } *
aInstancePtr = foundInterface; return status; }
712 
713NS_IMPL_CYCLE_COLLECTING_ADDREF(EventStateManager)MozExternalRefCountType EventStateManager::AddRef(void) { static_assert
(!std::is_destructible_v<EventStateManager>, "Reference-counted class "
 "EventStateManager" " should not have a public destructor. "
 "Make this class's destructor non-public"); do { static_assert
( mozilla::detail::AssertionConditionType<decltype(int32_t
(mRefCnt) >= 0)>::isValid, "invalid assertion condition"
); if ((__builtin_expect(!!(!(!!(int32_t(mRefCnt) >= 0))),
 0))) { do { } while (false); MOZ_ReportAssertionFailure("int32_t(mRefCnt) >= 0"
 " (" "illegal refcnt" ")", "/var/lib/jenkins/workspace/firefox-scan-build/dom/events/EventStateManager.cpp"
, 713); AnnotateMozCrashReason("MOZ_ASSERT" "(" "int32_t(mRefCnt) >= 0"
 ") (" "illegal refcnt" ")"); do { *((volatile int*)__null) =
 713; __attribute__((nomerge)) ::abort(); } while (false); } }
 while (false); _mOwningThread.AssertOwnership("EventStateManager"
 " not thread-safe"); nsISupports* base = EventStateManager::
cycleCollection::Upcast(this); nsrefcnt count = mRefCnt.incr(
base); NS_LogAddRef((this), (count), ("EventStateManager"), (
uint32_t)(sizeof(*this))); return count; }
714NS_IMPL_CYCLE_COLLECTING_RELEASE(EventStateManager)MozExternalRefCountType EventStateManager::Release(void) { do
 { static_assert( mozilla::detail::AssertionConditionType<
decltype(int32_t(mRefCnt) > 0)>::isValid, "invalid assertion condition"
); if ((__builtin_expect(!!(!(!!(int32_t(mRefCnt) > 0))), 0
))) { do { } while (false); MOZ_ReportAssertionFailure("int32_t(mRefCnt) > 0"
 " (" "dup release" ")", "/var/lib/jenkins/workspace/firefox-scan-build/dom/events/EventStateManager.cpp"
, 714); AnnotateMozCrashReason("MOZ_ASSERT" "(" "int32_t(mRefCnt) > 0"
 ") (" "dup release" ")"); do { *((volatile int*)__null) = 714
; __attribute__((nomerge)) ::abort(); } while (false); } } while
 (false); _mOwningThread.AssertOwnership("EventStateManager" " not thread-safe"
); nsISupports* base = EventStateManager::cycleCollection::Upcast
(this); nsrefcnt count = mRefCnt.decr(base); NS_LogRelease((this
), (count), ("EventStateManager")); return count; } void EventStateManager
::DeleteCycleCollectable(void) { delete (this); }
715 
716NS_IMPL_CYCLE_COLLECTION_WEAK(EventStateManager, mCurrentTargetContent,EventStateManager::cycleCollection EventStateManager::_cycleCollectorGlobal
; void EventStateManager::cycleCollection::Unlink(void* p) { EventStateManager
* tmp = DowncastCCParticipant<EventStateManager>(p); ImplCycleCollectionUnlink
(tmp->mCurrentTargetContent); ImplCycleCollectionUnlink(tmp
->mGestureDownContent); ImplCycleCollectionUnlink(tmp->
mGestureDownFrameOwner); ImplCycleCollectionUnlink(tmp->mLastLeftMouseDownInfo
.mLastMouseDownContent); ImplCycleCollectionUnlink(tmp->mLastMiddleMouseDownInfo
.mLastMouseDownContent); ImplCycleCollectionUnlink(tmp->mLastRightMouseDownInfo
.mLastMouseDownContent); ImplCycleCollectionUnlink(tmp->mActiveContent
); ImplCycleCollectionUnlink(tmp->mHoverContent); ImplCycleCollectionUnlink
(tmp->mURLTargetContent); ImplCycleCollectionUnlink(tmp->
mPopoverPointerDownTarget); ImplCycleCollectionUnlink(tmp->
mMouseEnterLeaveHelper); ImplCycleCollectionUnlink(tmp->mPointersEnterLeaveHelper
); ImplCycleCollectionUnlink(tmp->mDocument); ImplCycleCollectionUnlink
(tmp->mIMEContentObserver); ImplCycleCollectionUnlink(tmp->
mAccessKeys); tmp->ClearWeakReferences(); (void)tmp; } nsresult
 EventStateManager::cycleCollection::TraverseNative( void* p,
 nsCycleCollectionTraversalCallback& cb) { EventStateManager
* tmp = DowncastCCParticipant<EventStateManager>(p); cb
.DescribeRefCountedNode(tmp->mRefCnt.get(), "EventStateManager"
); ImplCycleCollectionTraverse(cb, tmp->mCurrentTargetContent
, "mCurrentTargetContent", 0); ImplCycleCollectionTraverse(cb
, tmp->mGestureDownContent, "mGestureDownContent", 0); ImplCycleCollectionTraverse
(cb, tmp->mGestureDownFrameOwner, "mGestureDownFrameOwner"
, 0); ImplCycleCollectionTraverse(cb, tmp->mLastLeftMouseDownInfo
.mLastMouseDownContent, "mLastLeftMouseDownInfo.mLastMouseDownContent"
, 0); ImplCycleCollectionTraverse(cb, tmp->mLastMiddleMouseDownInfo
.mLastMouseDownContent, "mLastMiddleMouseDownInfo.mLastMouseDownContent"
, 0); ImplCycleCollectionTraverse(cb, tmp->mLastRightMouseDownInfo
.mLastMouseDownContent, "mLastRightMouseDownInfo.mLastMouseDownContent"
, 0); ImplCycleCollectionTraverse(cb, tmp->mActiveContent,
 "mActiveContent", 0); ImplCycleCollectionTraverse(cb, tmp->
mHoverContent, "mHoverContent", 0); ImplCycleCollectionTraverse
(cb, tmp->mURLTargetContent, "mURLTargetContent", 0); ImplCycleCollectionTraverse
(cb, tmp->mPopoverPointerDownTarget, "mPopoverPointerDownTarget"
, 0); ImplCycleCollectionTraverse(cb, tmp->mMouseEnterLeaveHelper
, "mMouseEnterLeaveHelper", 0); ImplCycleCollectionTraverse(cb
, tmp->mPointersEnterLeaveHelper, "mPointersEnterLeaveHelper"
, 0); ImplCycleCollectionTraverse(cb, tmp->mDocument, "mDocument"
, 0); ImplCycleCollectionTraverse(cb, tmp->mIMEContentObserver
, "mIMEContentObserver", 0); ImplCycleCollectionTraverse(cb, tmp
->mAccessKeys, "mAccessKeys", 0); (void)tmp; return NS_OK;
 }
717                              mGestureDownContent, mGestureDownFrameOwner,EventStateManager::cycleCollection EventStateManager::_cycleCollectorGlobal
; void EventStateManager::cycleCollection::Unlink(void* p) { EventStateManager
* tmp = DowncastCCParticipant<EventStateManager>(p); ImplCycleCollectionUnlink
(tmp->mCurrentTargetContent); ImplCycleCollectionUnlink(tmp
->mGestureDownContent); ImplCycleCollectionUnlink(tmp->
mGestureDownFrameOwner); ImplCycleCollectionUnlink(tmp->mLastLeftMouseDownInfo
.mLastMouseDownContent); ImplCycleCollectionUnlink(tmp->mLastMiddleMouseDownInfo
.mLastMouseDownContent); ImplCycleCollectionUnlink(tmp->mLastRightMouseDownInfo
.mLastMouseDownContent); ImplCycleCollectionUnlink(tmp->mActiveContent
); ImplCycleCollectionUnlink(tmp->mHoverContent); ImplCycleCollectionUnlink
(tmp->mURLTargetContent); ImplCycleCollectionUnlink(tmp->
mPopoverPointerDownTarget); ImplCycleCollectionUnlink(tmp->
mMouseEnterLeaveHelper); ImplCycleCollectionUnlink(tmp->mPointersEnterLeaveHelper
); ImplCycleCollectionUnlink(tmp->mDocument); ImplCycleCollectionUnlink
(tmp->mIMEContentObserver); ImplCycleCollectionUnlink(tmp->
mAccessKeys); tmp->ClearWeakReferences(); (void)tmp; } nsresult
 EventStateManager::cycleCollection::TraverseNative( void* p,
 nsCycleCollectionTraversalCallback& cb) { EventStateManager
* tmp = DowncastCCParticipant<EventStateManager>(p); cb
.DescribeRefCountedNode(tmp->mRefCnt.get(), "EventStateManager"
); ImplCycleCollectionTraverse(cb, tmp->mCurrentTargetContent
, "mCurrentTargetContent", 0); ImplCycleCollectionTraverse(cb
, tmp->mGestureDownContent, "mGestureDownContent", 0); ImplCycleCollectionTraverse
(cb, tmp->mGestureDownFrameOwner, "mGestureDownFrameOwner"
, 0); ImplCycleCollectionTraverse(cb, tmp->mLastLeftMouseDownInfo
.mLastMouseDownContent, "mLastLeftMouseDownInfo.mLastMouseDownContent"
, 0); ImplCycleCollectionTraverse(cb, tmp->mLastMiddleMouseDownInfo
.mLastMouseDownContent, "mLastMiddleMouseDownInfo.mLastMouseDownContent"
, 0); ImplCycleCollectionTraverse(cb, tmp->mLastRightMouseDownInfo
.mLastMouseDownContent, "mLastRightMouseDownInfo.mLastMouseDownContent"
, 0); ImplCycleCollectionTraverse(cb, tmp->mActiveContent,
 "mActiveContent", 0); ImplCycleCollectionTraverse(cb, tmp->
mHoverContent, "mHoverContent", 0); ImplCycleCollectionTraverse
(cb, tmp->mURLTargetContent, "mURLTargetContent", 0); ImplCycleCollectionTraverse
(cb, tmp->mPopoverPointerDownTarget, "mPopoverPointerDownTarget"
, 0); ImplCycleCollectionTraverse(cb, tmp->mMouseEnterLeaveHelper
, "mMouseEnterLeaveHelper", 0); ImplCycleCollectionTraverse(cb
, tmp->mPointersEnterLeaveHelper, "mPointersEnterLeaveHelper"
, 0); ImplCycleCollectionTraverse(cb, tmp->mDocument, "mDocument"
, 0); ImplCycleCollectionTraverse(cb, tmp->mIMEContentObserver
, "mIMEContentObserver", 0); ImplCycleCollectionTraverse(cb, tmp
->mAccessKeys, "mAccessKeys", 0); (void)tmp; return NS_OK;
 }
718                              mLastLeftMouseDownInfo.mLastMouseDownContent,EventStateManager::cycleCollection EventStateManager::_cycleCollectorGlobal
; void EventStateManager::cycleCollection::Unlink(void* p) { EventStateManager
* tmp = DowncastCCParticipant<EventStateManager>(p); ImplCycleCollectionUnlink
(tmp->mCurrentTargetContent); ImplCycleCollectionUnlink(tmp
->mGestureDownContent); ImplCycleCollectionUnlink(tmp->
mGestureDownFrameOwner); ImplCycleCollectionUnlink(tmp->mLastLeftMouseDownInfo
.mLastMouseDownContent); ImplCycleCollectionUnlink(tmp->mLastMiddleMouseDownInfo
.mLastMouseDownContent); ImplCycleCollectionUnlink(tmp->mLastRightMouseDownInfo
.mLastMouseDownContent); ImplCycleCollectionUnlink(tmp->mActiveContent
); ImplCycleCollectionUnlink(tmp->mHoverContent); ImplCycleCollectionUnlink
(tmp->mURLTargetContent); ImplCycleCollectionUnlink(tmp->
mPopoverPointerDownTarget); ImplCycleCollectionUnlink(tmp->
mMouseEnterLeaveHelper); ImplCycleCollectionUnlink(tmp->mPointersEnterLeaveHelper
); ImplCycleCollectionUnlink(tmp->mDocument); ImplCycleCollectionUnlink
(tmp->mIMEContentObserver); ImplCycleCollectionUnlink(tmp->
mAccessKeys); tmp->ClearWeakReferences(); (void)tmp; } nsresult
 EventStateManager::cycleCollection::TraverseNative( void* p,
 nsCycleCollectionTraversalCallback& cb) { EventStateManager
* tmp = DowncastCCParticipant<EventStateManager>(p); cb
.DescribeRefCountedNode(tmp->mRefCnt.get(), "EventStateManager"
); ImplCycleCollectionTraverse(cb, tmp->mCurrentTargetContent
, "mCurrentTargetContent", 0); ImplCycleCollectionTraverse(cb
, tmp->mGestureDownContent, "mGestureDownContent", 0); ImplCycleCollectionTraverse
(cb, tmp->mGestureDownFrameOwner, "mGestureDownFrameOwner"
, 0); ImplCycleCollectionTraverse(cb, tmp->mLastLeftMouseDownInfo
.mLastMouseDownContent, "mLastLeftMouseDownInfo.mLastMouseDownContent"
, 0); ImplCycleCollectionTraverse(cb, tmp->mLastMiddleMouseDownInfo
.mLastMouseDownContent, "mLastMiddleMouseDownInfo.mLastMouseDownContent"
, 0); ImplCycleCollectionTraverse(cb, tmp->mLastRightMouseDownInfo
.mLastMouseDownContent, "mLastRightMouseDownInfo.mLastMouseDownContent"
, 0); ImplCycleCollectionTraverse(cb, tmp->mActiveContent,
 "mActiveContent", 0); ImplCycleCollectionTraverse(cb, tmp->
mHoverContent, "mHoverContent", 0); ImplCycleCollectionTraverse
(cb, tmp->mURLTargetContent, "mURLTargetContent", 0); ImplCycleCollectionTraverse
(cb, tmp->mPopoverPointerDownTarget, "mPopoverPointerDownTarget"
, 0); ImplCycleCollectionTraverse(cb, tmp->mMouseEnterLeaveHelper
, "mMouseEnterLeaveHelper", 0); ImplCycleCollectionTraverse(cb
, tmp->mPointersEnterLeaveHelper, "mPointersEnterLeaveHelper"
, 0); ImplCycleCollectionTraverse(cb, tmp->mDocument, "mDocument"
, 0); ImplCycleCollectionTraverse(cb, tmp->mIMEContentObserver
, "mIMEContentObserver", 0); ImplCycleCollectionTraverse(cb, tmp
->mAccessKeys, "mAccessKeys", 0); (void)tmp; return NS_OK;
 }
719                              mLastMiddleMouseDownInfo.mLastMouseDownContent,EventStateManager::cycleCollection EventStateManager::_cycleCollectorGlobal
; void EventStateManager::cycleCollection::Unlink(void* p) { EventStateManager
* tmp = DowncastCCParticipant<EventStateManager>(p); ImplCycleCollectionUnlink
(tmp->mCurrentTargetContent); ImplCycleCollectionUnlink(tmp
->mGestureDownContent); ImplCycleCollectionUnlink(tmp->
mGestureDownFrameOwner); ImplCycleCollectionUnlink(tmp->mLastLeftMouseDownInfo
.mLastMouseDownContent); ImplCycleCollectionUnlink(tmp->mLastMiddleMouseDownInfo
.mLastMouseDownContent); ImplCycleCollectionUnlink(tmp->mLastRightMouseDownInfo
.mLastMouseDownContent); ImplCycleCollectionUnlink(tmp->mActiveContent
); ImplCycleCollectionUnlink(tmp->mHoverContent); ImplCycleCollectionUnlink
(tmp->mURLTargetContent); ImplCycleCollectionUnlink(tmp->
mPopoverPointerDownTarget); ImplCycleCollectionUnlink(tmp->
mMouseEnterLeaveHelper); ImplCycleCollectionUnlink(tmp->mPointersEnterLeaveHelper
); ImplCycleCollectionUnlink(tmp->mDocument); ImplCycleCollectionUnlink
(tmp->mIMEContentObserver); ImplCycleCollectionUnlink(tmp->
mAccessKeys); tmp->ClearWeakReferences(); (void)tmp; } nsresult
 EventStateManager::cycleCollection::TraverseNative( void* p,
 nsCycleCollectionTraversalCallback& cb) { EventStateManager
* tmp = DowncastCCParticipant<EventStateManager>(p); cb
.DescribeRefCountedNode(tmp->mRefCnt.get(), "EventStateManager"
); ImplCycleCollectionTraverse(cb, tmp->mCurrentTargetContent
, "mCurrentTargetContent", 0); ImplCycleCollectionTraverse(cb
, tmp->mGestureDownContent, "mGestureDownContent", 0); ImplCycleCollectionTraverse
(cb, tmp->mGestureDownFrameOwner, "mGestureDownFrameOwner"
, 0); ImplCycleCollectionTraverse(cb, tmp->mLastLeftMouseDownInfo
.mLastMouseDownContent, "mLastLeftMouseDownInfo.mLastMouseDownContent"
, 0); ImplCycleCollectionTraverse(cb, tmp->mLastMiddleMouseDownInfo
.mLastMouseDownContent, "mLastMiddleMouseDownInfo.mLastMouseDownContent"
, 0); ImplCycleCollectionTraverse(cb, tmp->mLastRightMouseDownInfo
.mLastMouseDownContent, "mLastRightMouseDownInfo.mLastMouseDownContent"
, 0); ImplCycleCollectionTraverse(cb, tmp->mActiveContent,
 "mActiveContent", 0); ImplCycleCollectionTraverse(cb, tmp->
mHoverContent, "mHoverContent", 0); ImplCycleCollectionTraverse
(cb, tmp->mURLTargetContent, "mURLTargetContent", 0); ImplCycleCollectionTraverse
(cb, tmp->mPopoverPointerDownTarget, "mPopoverPointerDownTarget"
, 0); ImplCycleCollectionTraverse(cb, tmp->mMouseEnterLeaveHelper
, "mMouseEnterLeaveHelper", 0); ImplCycleCollectionTraverse(cb
, tmp->mPointersEnterLeaveHelper, "mPointersEnterLeaveHelper"
, 0); ImplCycleCollectionTraverse(cb, tmp->mDocument, "mDocument"
, 0); ImplCycleCollectionTraverse(cb, tmp->mIMEContentObserver
, "mIMEContentObserver", 0); ImplCycleCollectionTraverse(cb, tmp
->mAccessKeys, "mAccessKeys", 0); (void)tmp; return NS_OK;
 }
720                              mLastRightMouseDownInfo.mLastMouseDownContent,EventStateManager::cycleCollection EventStateManager::_cycleCollectorGlobal
; void EventStateManager::cycleCollection::Unlink(void* p) { EventStateManager
* tmp = DowncastCCParticipant<EventStateManager>(p); ImplCycleCollectionUnlink
(tmp->mCurrentTargetContent); ImplCycleCollectionUnlink(tmp
->mGestureDownContent); ImplCycleCollectionUnlink(tmp->
mGestureDownFrameOwner); ImplCycleCollectionUnlink(tmp->mLastLeftMouseDownInfo
.mLastMouseDownContent); ImplCycleCollectionUnlink(tmp->mLastMiddleMouseDownInfo
.mLastMouseDownContent); ImplCycleCollectionUnlink(tmp->mLastRightMouseDownInfo
.mLastMouseDownContent); ImplCycleCollectionUnlink(tmp->mActiveContent
); ImplCycleCollectionUnlink(tmp->mHoverContent); ImplCycleCollectionUnlink
(tmp->mURLTargetContent); ImplCycleCollectionUnlink(tmp->
mPopoverPointerDownTarget); ImplCycleCollectionUnlink(tmp->
mMouseEnterLeaveHelper); ImplCycleCollectionUnlink(tmp->mPointersEnterLeaveHelper
); ImplCycleCollectionUnlink(tmp->mDocument); ImplCycleCollectionUnlink
(tmp->mIMEContentObserver); ImplCycleCollectionUnlink(tmp->
mAccessKeys); tmp->ClearWeakReferences(); (void)tmp; } nsresult
 EventStateManager::cycleCollection::TraverseNative( void* p,
 nsCycleCollectionTraversalCallback& cb) { EventStateManager
* tmp = DowncastCCParticipant<EventStateManager>(p); cb
.DescribeRefCountedNode(tmp->mRefCnt.get(), "EventStateManager"
); ImplCycleCollectionTraverse(cb, tmp->mCurrentTargetContent
, "mCurrentTargetContent", 0); ImplCycleCollectionTraverse(cb
, tmp->mGestureDownContent, "mGestureDownContent", 0); ImplCycleCollectionTraverse
(cb, tmp->mGestureDownFrameOwner, "mGestureDownFrameOwner"
, 0); ImplCycleCollectionTraverse(cb, tmp->mLastLeftMouseDownInfo
.mLastMouseDownContent, "mLastLeftMouseDownInfo.mLastMouseDownContent"
, 0); ImplCycleCollectionTraverse(cb, tmp->mLastMiddleMouseDownInfo
.mLastMouseDownContent, "mLastMiddleMouseDownInfo.mLastMouseDownContent"
, 0); ImplCycleCollectionTraverse(cb, tmp->mLastRightMouseDownInfo
.mLastMouseDownContent, "mLastRightMouseDownInfo.mLastMouseDownContent"
, 0); ImplCycleCollectionTraverse(cb, tmp->mActiveContent,
 "mActiveContent", 0); ImplCycleCollectionTraverse(cb, tmp->
mHoverContent, "mHoverContent", 0); ImplCycleCollectionTraverse
(cb, tmp->mURLTargetContent, "mURLTargetContent", 0); ImplCycleCollectionTraverse
(cb, tmp->mPopoverPointerDownTarget, "mPopoverPointerDownTarget"
, 0); ImplCycleCollectionTraverse(cb, tmp->mMouseEnterLeaveHelper
, "mMouseEnterLeaveHelper", 0); ImplCycleCollectionTraverse(cb
, tmp->mPointersEnterLeaveHelper, "mPointersEnterLeaveHelper"
, 0); ImplCycleCollectionTraverse(cb, tmp->mDocument, "mDocument"
, 0); ImplCycleCollectionTraverse(cb, tmp->mIMEContentObserver
, "mIMEContentObserver", 0); ImplCycleCollectionTraverse(cb, tmp
->mAccessKeys, "mAccessKeys", 0); (void)tmp; return NS_OK;
 }
721                              mActiveContent, mHoverContent, mURLTargetContent,EventStateManager::cycleCollection EventStateManager::_cycleCollectorGlobal
; void EventStateManager::cycleCollection::Unlink(void* p) { EventStateManager
* tmp = DowncastCCParticipant<EventStateManager>(p); ImplCycleCollectionUnlink
(tmp->mCurrentTargetContent); ImplCycleCollectionUnlink(tmp
->mGestureDownContent); ImplCycleCollectionUnlink(tmp->
mGestureDownFrameOwner); ImplCycleCollectionUnlink(tmp->mLastLeftMouseDownInfo
.mLastMouseDownContent); ImplCycleCollectionUnlink(tmp->mLastMiddleMouseDownInfo
.mLastMouseDownContent); ImplCycleCollectionUnlink(tmp->mLastRightMouseDownInfo
.mLastMouseDownContent); ImplCycleCollectionUnlink(tmp->mActiveContent
); ImplCycleCollectionUnlink(tmp->mHoverContent); ImplCycleCollectionUnlink
(tmp->mURLTargetContent); ImplCycleCollectionUnlink(tmp->
mPopoverPointerDownTarget); ImplCycleCollectionUnlink(tmp->
mMouseEnterLeaveHelper); ImplCycleCollectionUnlink(tmp->mPointersEnterLeaveHelper
); ImplCycleCollectionUnlink(tmp->mDocument); ImplCycleCollectionUnlink
(tmp->mIMEContentObserver); ImplCycleCollectionUnlink(tmp->
mAccessKeys); tmp->ClearWeakReferences(); (void)tmp; } nsresult
 EventStateManager::cycleCollection::TraverseNative( void* p,
 nsCycleCollectionTraversalCallback& cb) { EventStateManager
* tmp = DowncastCCParticipant<EventStateManager>(p); cb
.DescribeRefCountedNode(tmp->mRefCnt.get(), "EventStateManager"
); ImplCycleCollectionTraverse(cb, tmp->mCurrentTargetContent
, "mCurrentTargetContent", 0); ImplCycleCollectionTraverse(cb
, tmp->mGestureDownContent, "mGestureDownContent", 0); ImplCycleCollectionTraverse
(cb, tmp->mGestureDownFrameOwner, "mGestureDownFrameOwner"
, 0); ImplCycleCollectionTraverse(cb, tmp->mLastLeftMouseDownInfo
.mLastMouseDownContent, "mLastLeftMouseDownInfo.mLastMouseDownContent"
, 0); ImplCycleCollectionTraverse(cb, tmp->mLastMiddleMouseDownInfo
.mLastMouseDownContent, "mLastMiddleMouseDownInfo.mLastMouseDownContent"
, 0); ImplCycleCollectionTraverse(cb, tmp->mLastRightMouseDownInfo
.mLastMouseDownContent, "mLastRightMouseDownInfo.mLastMouseDownContent"
, 0); ImplCycleCollectionTraverse(cb, tmp->mActiveContent,
 "mActiveContent", 0); ImplCycleCollectionTraverse(cb, tmp->
mHoverContent, "mHoverContent", 0); ImplCycleCollectionTraverse
(cb, tmp->mURLTargetContent, "mURLTargetContent", 0); ImplCycleCollectionTraverse
(cb, tmp->mPopoverPointerDownTarget, "mPopoverPointerDownTarget"
, 0); ImplCycleCollectionTraverse(cb, tmp->mMouseEnterLeaveHelper
, "mMouseEnterLeaveHelper", 0); ImplCycleCollectionTraverse(cb
, tmp->mPointersEnterLeaveHelper, "mPointersEnterLeaveHelper"
, 0); ImplCycleCollectionTraverse(cb, tmp->mDocument, "mDocument"
, 0); ImplCycleCollectionTraverse(cb, tmp->mIMEContentObserver
, "mIMEContentObserver", 0); ImplCycleCollectionTraverse(cb, tmp
->mAccessKeys, "mAccessKeys", 0); (void)tmp; return NS_OK;
 }
722                              mPopoverPointerDownTarget, mMouseEnterLeaveHelper,EventStateManager::cycleCollection EventStateManager::_cycleCollectorGlobal
; void EventStateManager::cycleCollection::Unlink(void* p) { EventStateManager
* tmp = DowncastCCParticipant<EventStateManager>(p); ImplCycleCollectionUnlink
(tmp->mCurrentTargetContent); ImplCycleCollectionUnlink(tmp
->mGestureDownContent); ImplCycleCollectionUnlink(tmp->
mGestureDownFrameOwner); ImplCycleCollectionUnlink(tmp->mLastLeftMouseDownInfo
.mLastMouseDownContent); ImplCycleCollectionUnlink(tmp->mLastMiddleMouseDownInfo
.mLastMouseDownContent); ImplCycleCollectionUnlink(tmp->mLastRightMouseDownInfo
.mLastMouseDownContent); ImplCycleCollectionUnlink(tmp->mActiveContent
); ImplCycleCollectionUnlink(tmp->mHoverContent); ImplCycleCollectionUnlink
(tmp->mURLTargetContent); ImplCycleCollectionUnlink(tmp->
mPopoverPointerDownTarget); ImplCycleCollectionUnlink(tmp->
mMouseEnterLeaveHelper); ImplCycleCollectionUnlink(tmp->mPointersEnterLeaveHelper
); ImplCycleCollectionUnlink(tmp->mDocument); ImplCycleCollectionUnlink
(tmp->mIMEContentObserver); ImplCycleCollectionUnlink(tmp->
mAccessKeys); tmp->ClearWeakReferences(); (void)tmp; } nsresult
 EventStateManager::cycleCollection::TraverseNative( void* p,
 nsCycleCollectionTraversalCallback& cb) { EventStateManager
* tmp = DowncastCCParticipant<EventStateManager>(p); cb
.DescribeRefCountedNode(tmp->mRefCnt.get(), "EventStateManager"
); ImplCycleCollectionTraverse(cb, tmp->mCurrentTargetContent
, "mCurrentTargetContent", 0); ImplCycleCollectionTraverse(cb
, tmp->mGestureDownContent, "mGestureDownContent", 0); ImplCycleCollectionTraverse
(cb, tmp->mGestureDownFrameOwner, "mGestureDownFrameOwner"
, 0); ImplCycleCollectionTraverse(cb, tmp->mLastLeftMouseDownInfo
.mLastMouseDownContent, "mLastLeftMouseDownInfo.mLastMouseDownContent"
, 0); ImplCycleCollectionTraverse(cb, tmp->mLastMiddleMouseDownInfo
.mLastMouseDownContent, "mLastMiddleMouseDownInfo.mLastMouseDownContent"
, 0); ImplCycleCollectionTraverse(cb, tmp->mLastRightMouseDownInfo
.mLastMouseDownContent, "mLastRightMouseDownInfo.mLastMouseDownContent"
, 0); ImplCycleCollectionTraverse(cb, tmp->mActiveContent,
 "mActiveContent", 0); ImplCycleCollectionTraverse(cb, tmp->
mHoverContent, "mHoverContent", 0); ImplCycleCollectionTraverse
(cb, tmp->mURLTargetContent, "mURLTargetContent", 0); ImplCycleCollectionTraverse
(cb, tmp->mPopoverPointerDownTarget, "mPopoverPointerDownTarget"
, 0); ImplCycleCollectionTraverse(cb, tmp->mMouseEnterLeaveHelper
, "mMouseEnterLeaveHelper", 0); ImplCycleCollectionTraverse(cb
, tmp->mPointersEnterLeaveHelper, "mPointersEnterLeaveHelper"
, 0); ImplCycleCollectionTraverse(cb, tmp->mDocument, "mDocument"
, 0); ImplCycleCollectionTraverse(cb, tmp->mIMEContentObserver
, "mIMEContentObserver", 0); ImplCycleCollectionTraverse(cb, tmp
->mAccessKeys, "mAccessKeys", 0); (void)tmp; return NS_OK;
 }
723                              mPointersEnterLeaveHelper, mDocument,EventStateManager::cycleCollection EventStateManager::_cycleCollectorGlobal
; void EventStateManager::cycleCollection::Unlink(void* p) { EventStateManager
* tmp = DowncastCCParticipant<EventStateManager>(p); ImplCycleCollectionUnlink
(tmp->mCurrentTargetContent); ImplCycleCollectionUnlink(tmp
->mGestureDownContent); ImplCycleCollectionUnlink(tmp->
mGestureDownFrameOwner); ImplCycleCollectionUnlink(tmp->mLastLeftMouseDownInfo
.mLastMouseDownContent); ImplCycleCollectionUnlink(tmp->mLastMiddleMouseDownInfo
.mLastMouseDownContent); ImplCycleCollectionUnlink(tmp->mLastRightMouseDownInfo
.mLastMouseDownContent); ImplCycleCollectionUnlink(tmp->mActiveContent
); ImplCycleCollectionUnlink(tmp->mHoverContent); ImplCycleCollectionUnlink
(tmp->mURLTargetContent); ImplCycleCollectionUnlink(tmp->
mPopoverPointerDownTarget); ImplCycleCollectionUnlink(tmp->
mMouseEnterLeaveHelper); ImplCycleCollectionUnlink(tmp->mPointersEnterLeaveHelper
); ImplCycleCollectionUnlink(tmp->mDocument); ImplCycleCollectionUnlink
(tmp->mIMEContentObserver); ImplCycleCollectionUnlink(tmp->
mAccessKeys); tmp->ClearWeakReferences(); (void)tmp; } nsresult
 EventStateManager::cycleCollection::TraverseNative( void* p,
 nsCycleCollectionTraversalCallback& cb) { EventStateManager
* tmp = DowncastCCParticipant<EventStateManager>(p); cb
.DescribeRefCountedNode(tmp->mRefCnt.get(), "EventStateManager"
); ImplCycleCollectionTraverse(cb, tmp->mCurrentTargetContent
, "mCurrentTargetContent", 0); ImplCycleCollectionTraverse(cb
, tmp->mGestureDownContent, "mGestureDownContent", 0); ImplCycleCollectionTraverse
(cb, tmp->mGestureDownFrameOwner, "mGestureDownFrameOwner"
, 0); ImplCycleCollectionTraverse(cb, tmp->mLastLeftMouseDownInfo
.mLastMouseDownContent, "mLastLeftMouseDownInfo.mLastMouseDownContent"
, 0); ImplCycleCollectionTraverse(cb, tmp->mLastMiddleMouseDownInfo
.mLastMouseDownContent, "mLastMiddleMouseDownInfo.mLastMouseDownContent"
, 0); ImplCycleCollectionTraverse(cb, tmp->mLastRightMouseDownInfo
.mLastMouseDownContent, "mLastRightMouseDownInfo.mLastMouseDownContent"
, 0); ImplCycleCollectionTraverse(cb, tmp->mActiveContent,
 "mActiveContent", 0); ImplCycleCollectionTraverse(cb, tmp->
mHoverContent, "mHoverContent", 0); ImplCycleCollectionTraverse
(cb, tmp->mURLTargetContent, "mURLTargetContent", 0); ImplCycleCollectionTraverse
(cb, tmp->mPopoverPointerDownTarget, "mPopoverPointerDownTarget"
, 0); ImplCycleCollectionTraverse(cb, tmp->mMouseEnterLeaveHelper
, "mMouseEnterLeaveHelper", 0); ImplCycleCollectionTraverse(cb
, tmp->mPointersEnterLeaveHelper, "mPointersEnterLeaveHelper"
, 0); ImplCycleCollectionTraverse(cb, tmp->mDocument, "mDocument"
, 0); ImplCycleCollectionTraverse(cb, tmp->mIMEContentObserver
, "mIMEContentObserver", 0); ImplCycleCollectionTraverse(cb, tmp
->mAccessKeys, "mAccessKeys", 0); (void)tmp; return NS_OK;
 }
724                              mIMEContentObserver, mAccessKeys)EventStateManager::cycleCollection EventStateManager::_cycleCollectorGlobal
; void EventStateManager::cycleCollection::Unlink(void* p) { EventStateManager
* tmp = DowncastCCParticipant<EventStateManager>(p); ImplCycleCollectionUnlink
(tmp->mCurrentTargetContent); ImplCycleCollectionUnlink(tmp
->mGestureDownContent); ImplCycleCollectionUnlink(tmp->
mGestureDownFrameOwner); ImplCycleCollectionUnlink(tmp->mLastLeftMouseDownInfo
.mLastMouseDownContent); ImplCycleCollectionUnlink(tmp->mLastMiddleMouseDownInfo
.mLastMouseDownContent); ImplCycleCollectionUnlink(tmp->mLastRightMouseDownInfo
.mLastMouseDownContent); ImplCycleCollectionUnlink(tmp->mActiveContent
); ImplCycleCollectionUnlink(tmp->mHoverContent); ImplCycleCollectionUnlink
(tmp->mURLTargetContent); ImplCycleCollectionUnlink(tmp->
mPopoverPointerDownTarget); ImplCycleCollectionUnlink(tmp->
mMouseEnterLeaveHelper); ImplCycleCollectionUnlink(tmp->mPointersEnterLeaveHelper
); ImplCycleCollectionUnlink(tmp->mDocument); ImplCycleCollectionUnlink
(tmp->mIMEContentObserver); ImplCycleCollectionUnlink(tmp->
mAccessKeys); tmp->ClearWeakReferences(); (void)tmp; } nsresult
 EventStateManager::cycleCollection::TraverseNative( void* p,
 nsCycleCollectionTraversalCallback& cb) { EventStateManager
* tmp = DowncastCCParticipant<EventStateManager>(p); cb
.DescribeRefCountedNode(tmp->mRefCnt.get(), "EventStateManager"
); ImplCycleCollectionTraverse(cb, tmp->mCurrentTargetContent
, "mCurrentTargetContent", 0); ImplCycleCollectionTraverse(cb
, tmp->mGestureDownContent, "mGestureDownContent", 0); ImplCycleCollectionTraverse
(cb, tmp->mGestureDownFrameOwner, "mGestureDownFrameOwner"
, 0); ImplCycleCollectionTraverse(cb, tmp->mLastLeftMouseDownInfo
.mLastMouseDownContent, "mLastLeftMouseDownInfo.mLastMouseDownContent"
, 0); ImplCycleCollectionTraverse(cb, tmp->mLastMiddleMouseDownInfo
.mLastMouseDownContent, "mLastMiddleMouseDownInfo.mLastMouseDownContent"
, 0); ImplCycleCollectionTraverse(cb, tmp->mLastRightMouseDownInfo
.mLastMouseDownContent, "mLastRightMouseDownInfo.mLastMouseDownContent"
, 0); ImplCycleCollectionTraverse(cb, tmp->mActiveContent,
 "mActiveContent", 0); ImplCycleCollectionTraverse(cb, tmp->
mHoverContent, "mHoverContent", 0); ImplCycleCollectionTraverse
(cb, tmp->mURLTargetContent, "mURLTargetContent", 0); ImplCycleCollectionTraverse
(cb, tmp->mPopoverPointerDownTarget, "mPopoverPointerDownTarget"
, 0); ImplCycleCollectionTraverse(cb, tmp->mMouseEnterLeaveHelper
, "mMouseEnterLeaveHelper", 0); ImplCycleCollectionTraverse(cb
, tmp->mPointersEnterLeaveHelper, "mPointersEnterLeaveHelper"
, 0); ImplCycleCollectionTraverse(cb, tmp->mDocument, "mDocument"
, 0); ImplCycleCollectionTraverse(cb, tmp->mIMEContentObserver
, "mIMEContentObserver", 0); ImplCycleCollectionTraverse(cb, tmp
->mAccessKeys, "mAccessKeys", 0); (void)tmp; return NS_OK;
 }
725 
726void EventStateManager::ReleaseCurrentIMEContentObserver() {
727  if (mIMEContentObserver) {
728    mIMEContentObserver->DisconnectFromEventStateManager();
729  }
730  mIMEContentObserver = nullptr;
731}
732 
733void EventStateManager::OnStartToObserveContent(
734    IMEContentObserver* aIMEContentObserver) {
735  if (mIMEContentObserver == aIMEContentObserver) {
736    return;
737  }
738  ReleaseCurrentIMEContentObserver();
739  mIMEContentObserver = aIMEContentObserver;
740}
741 
742void EventStateManager::OnStopObservingContent(
743    IMEContentObserver* aIMEContentObserver) {
744  aIMEContentObserver->DisconnectFromEventStateManager();
745  NS_ENSURE_TRUE_VOID(mIMEContentObserver == aIMEContentObserver)do { if ((__builtin_expect(!!(!(mIMEContentObserver == aIMEContentObserver
)), 0))) { NS_DebugBreak(NS_DEBUG_WARNING, "NS_ENSURE_TRUE(" "mIMEContentObserver == aIMEContentObserver"
 ") failed", nullptr, "/var/lib/jenkins/workspace/firefox-scan-build/dom/events/EventStateManager.cpp"
, 745); return; } } while (false);
746  mIMEContentObserver = nullptr;
747}
748 
749void EventStateManager::TryToFlushPendingNotificationsToIME() {
750  if (mIMEContentObserver) {
751    mIMEContentObserver->TryToFlushPendingNotifications(true);
752  }
753}
754 
755static bool IsMessageMouseUserActivity(EventMessage aMessage) {
756  return aMessage == eMouseMove || aMessage == eMouseUp ||
757         aMessage == eMouseDown || aMessage == ePointerAuxClick ||
758         aMessage == eMouseDoubleClick || aMessage == ePointerClick ||
759         aMessage == eMouseActivate || aMessage == eMouseLongTap;
760}
761 
762static bool IsMessageGamepadUserActivity(EventMessage aMessage) {
763  return aMessage == eGamepadButtonDown || aMessage == eGamepadButtonUp ||
764         aMessage == eGamepadAxisMove;
765}
766 
767// static
768bool EventStateManager::IsKeyboardEventUserActivity(WidgetEvent* aEvent) {
769  // We ignore things that shouldn't cause popups, but also things that look
770  // like shortcut presses. In some obscure cases these may actually be
771  // website input, but any meaningful website will have other input anyway,
772  // and we can't very well tell whether shortcut input was supposed to be
773  // directed at chrome or the document.
774 
775  WidgetKeyboardEvent* keyEvent = aEvent->AsKeyboardEvent();
776  // Access keys should be treated as page interaction.
777  if (keyEvent->ModifiersMatchWithAccessKey(AccessKeyType::eContent)) {
778    return true;
779  }
780  if (!keyEvent->CanTreatAsUserInput() || keyEvent->IsControl() ||
781      keyEvent->IsMeta() || keyEvent->IsAlt()) {
782    return false;
783  }
784  // Deal with function keys:
785  switch (keyEvent->mKeyNameIndex) {
786    case KEY_NAME_INDEX_F1:
787    case KEY_NAME_INDEX_F2:
788    case KEY_NAME_INDEX_F3:
789    case KEY_NAME_INDEX_F4:
790    case KEY_NAME_INDEX_F5:
791    case KEY_NAME_INDEX_F6:
792    case KEY_NAME_INDEX_F7:
793    case KEY_NAME_INDEX_F8:
794    case KEY_NAME_INDEX_F9:
795    case KEY_NAME_INDEX_F10:
796    case KEY_NAME_INDEX_F11:
797    case KEY_NAME_INDEX_F12:
798    case KEY_NAME_INDEX_F13:
799    case KEY_NAME_INDEX_F14:
800    case KEY_NAME_INDEX_F15:
801    case KEY_NAME_INDEX_F16:
802    case KEY_NAME_INDEX_F17:
803    case KEY_NAME_INDEX_F18:
804    case KEY_NAME_INDEX_F19:
805    case KEY_NAME_INDEX_F20:
806    case KEY_NAME_INDEX_F21:
807    case KEY_NAME_INDEX_F22:
808    case KEY_NAME_INDEX_F23:
809    case KEY_NAME_INDEX_F24:
810      return false;
811    default:
812      return true;
813  }
814}
815 
816static void OnTypingInteractionEnded() {
817  // We don't consider a single keystroke to be typing.
818  if (gTypingInteractionKeyPresses > 1) {
819    gTypingInteraction.mInteractionCount += gTypingInteractionKeyPresses;
820    gTypingInteraction.mInteractionTimeInMilliseconds += static_cast<uint32_t>(
821        std::ceil((gTypingEndTime - gTypingStartTime).ToMilliseconds()));
822  }
823 
824  gTypingInteractionKeyPresses = 0;
825  gTypingStartTime = TimeStamp();
826  gTypingEndTime = TimeStamp();
827}
828 
829static void HandleKeyUpInteraction(WidgetKeyboardEvent* aKeyEvent) {
830  if (EventStateManager::IsKeyboardEventUserActivity(aKeyEvent)) {
831    TimeStamp now = TimeStamp::Now();
832    if (gTypingEndTime.IsNull()) {
833      gTypingEndTime = now;
834    }
835    TimeDuration delay = now - gTypingEndTime;
836    // Has it been too long since the last keystroke to be considered typing?
837    if (gTypingInteractionKeyPresses > 0 &&
838        delay >
839            TimeDuration::FromMilliseconds(
840                StaticPrefs::browser_places_interactions_typing_timeout_ms())) {
841      OnTypingInteractionEnded();
842    }
843    gTypingInteractionKeyPresses++;
844    if (gTypingStartTime.IsNull()) {
845      gTypingStartTime = now;
846    }
847    gTypingEndTime = now;
848  }
849}
850 
851nsresult EventStateManager::PreHandleEvent(nsPresContext* aPresContext,
852                                           WidgetEvent* aEvent,
853                                           nsIFrame* aTargetFrame,
854                                           nsIContent* aTargetContent,
855                                           nsEventStatus* aStatus,
856                                           nsIContent* aOverrideClickTarget) {
857  AUTO_PROFILER_LABEL("EventStateManager::PreHandleEvent", DOM)mozilla::AutoProfilerLabel raiiObject857( "EventStateManager::PreHandleEvent"
, nullptr, JS::ProfilingCategoryPair::DOM);
858  NS_ENSURE_ARG_POINTER(aStatus)do { if ((__builtin_expect(!!(!(aStatus)), 0))) { NS_DebugBreak
(NS_DEBUG_WARNING, "NS_ENSURE_TRUE(" "aStatus" ") failed", nullptr
, "/var/lib/jenkins/workspace/firefox-scan-build/dom/events/EventStateManager.cpp"
, 858); return NS_ERROR_INVALID_POINTER; } } while (false);
859  NS_ENSURE_ARG(aPresContext)do { if ((__builtin_expect(!!(!(aPresContext)), 0))) { NS_DebugBreak
(NS_DEBUG_WARNING, "NS_ENSURE_TRUE(" "aPresContext" ") failed"
, nullptr, "/var/lib/jenkins/workspace/firefox-scan-build/dom/events/EventStateManager.cpp"
, 859); return NS_ERROR_INVALID_ARG; } } while (false);
860  if (!aEvent) {
861    NS_ERROR("aEvent is null.  This should never happen.")do { NS_DebugBreak(NS_DEBUG_ASSERTION, "aEvent is null.  This should never happen."
, "Error", "/var/lib/jenkins/workspace/firefox-scan-build/dom/events/EventStateManager.cpp"
, 861); MOZ_PretendNoReturn(); } while (0);
862    return NS_ERROR_NULL_POINTER;
863  }
864 
865  NS_WARNING_ASSERTION(do { if (!(!aTargetFrame || !aTargetFrame->GetContent() ||
 aTargetFrame->GetContent() == aTargetContent || aTargetFrame
->GetContent()->GetFlattenedTreeParent() == aTargetContent
 || aTargetFrame->IsGeneratedContentFrame())) { NS_DebugBreak
(NS_DEBUG_WARNING, "aTargetFrame should be related with aTargetContent"
, "!aTargetFrame || !aTargetFrame->GetContent() || aTargetFrame->GetContent() == aTargetContent || aTargetFrame->GetContent()->GetFlattenedTreeParent() == aTargetContent || aTargetFrame->IsGeneratedContentFrame()"
, "/var/lib/jenkins/workspace/firefox-scan-build/dom/events/EventStateManager.cpp"
, 871); } } while (false)
866      !aTargetFrame || !aTargetFrame->GetContent() ||do { if (!(!aTargetFrame || !aTargetFrame->GetContent() ||
 aTargetFrame->GetContent() == aTargetContent || aTargetFrame
->GetContent()->GetFlattenedTreeParent() == aTargetContent
 || aTargetFrame->IsGeneratedContentFrame())) { NS_DebugBreak
(NS_DEBUG_WARNING, "aTargetFrame should be related with aTargetContent"
, "!aTargetFrame || !aTargetFrame->GetContent() || aTargetFrame->GetContent() == aTargetContent || aTargetFrame->GetContent()->GetFlattenedTreeParent() == aTargetContent || aTargetFrame->IsGeneratedContentFrame()"
, "/var/lib/jenkins/workspace/firefox-scan-build/dom/events/EventStateManager.cpp"
, 871); } } while (false)
867          aTargetFrame->GetContent() == aTargetContent ||do { if (!(!aTargetFrame || !aTargetFrame->GetContent() ||
 aTargetFrame->GetContent() == aTargetContent || aTargetFrame
->GetContent()->GetFlattenedTreeParent() == aTargetContent
 || aTargetFrame->IsGeneratedContentFrame())) { NS_DebugBreak
(NS_DEBUG_WARNING, "aTargetFrame should be related with aTargetContent"
, "!aTargetFrame || !aTargetFrame->GetContent() || aTargetFrame->GetContent() == aTargetContent || aTargetFrame->GetContent()->GetFlattenedTreeParent() == aTargetContent || aTargetFrame->IsGeneratedContentFrame()"
, "/var/lib/jenkins/workspace/firefox-scan-build/dom/events/EventStateManager.cpp"
, 871); } } while (false)
868          aTargetFrame->GetContent()->GetFlattenedTreeParent() ==do { if (!(!aTargetFrame || !aTargetFrame->GetContent() ||
 aTargetFrame->GetContent() == aTargetContent || aTargetFrame
->GetContent()->GetFlattenedTreeParent() == aTargetContent
 || aTargetFrame->IsGeneratedContentFrame())) { NS_DebugBreak
(NS_DEBUG_WARNING, "aTargetFrame should be related with aTargetContent"
, "!aTargetFrame || !aTargetFrame->GetContent() || aTargetFrame->GetContent() == aTargetContent || aTargetFrame->GetContent()->GetFlattenedTreeParent() == aTargetContent || aTargetFrame->IsGeneratedContentFrame()"
, "/var/lib/jenkins/workspace/firefox-scan-build/dom/events/EventStateManager.cpp"
, 871); } } while (false)
869              aTargetContent ||do { if (!(!aTargetFrame || !aTargetFrame->GetContent() ||
 aTargetFrame->GetContent() == aTargetContent || aTargetFrame
->GetContent()->GetFlattenedTreeParent() == aTargetContent
 || aTargetFrame->IsGeneratedContentFrame())) { NS_DebugBreak
(NS_DEBUG_WARNING, "aTargetFrame should be related with aTargetContent"
, "!aTargetFrame || !aTargetFrame->GetContent() || aTargetFrame->GetContent() == aTargetContent || aTargetFrame->GetContent()->GetFlattenedTreeParent() == aTargetContent || aTargetFrame->IsGeneratedContentFrame()"
, "/var/lib/jenkins/workspace/firefox-scan-build/dom/events/EventStateManager.cpp"
, 871); } } while (false)
870          aTargetFrame->IsGeneratedContentFrame(),do { if (!(!aTargetFrame || !aTargetFrame->GetContent() ||
 aTargetFrame->GetContent() == aTargetContent || aTargetFrame
->GetContent()->GetFlattenedTreeParent() == aTargetContent
 || aTargetFrame->IsGeneratedContentFrame())) { NS_DebugBreak
(NS_DEBUG_WARNING, "aTargetFrame should be related with aTargetContent"
, "!aTargetFrame || !aTargetFrame->GetContent() || aTargetFrame->GetContent() == aTargetContent || aTargetFrame->GetContent()->GetFlattenedTreeParent() == aTargetContent || aTargetFrame->IsGeneratedContentFrame()"
, "/var/lib/jenkins/workspace/firefox-scan-build/dom/events/EventStateManager.cpp"
, 871); } } while (false)
871      "aTargetFrame should be related with aTargetContent")do { if (!(!aTargetFrame || !aTargetFrame->GetContent() ||
 aTargetFrame->GetContent() == aTargetContent || aTargetFrame
->GetContent()->GetFlattenedTreeParent() == aTargetContent
 || aTargetFrame->IsGeneratedContentFrame())) { NS_DebugBreak
(NS_DEBUG_WARNING, "aTargetFrame should be related with aTargetContent"
, "!aTargetFrame || !aTargetFrame->GetContent() || aTargetFrame->GetContent() == aTargetContent || aTargetFrame->GetContent()->GetFlattenedTreeParent() == aTargetContent || aTargetFrame->IsGeneratedContentFrame()"
, "/var/lib/jenkins/workspace/firefox-scan-build/dom/events/EventStateManager.cpp"
, 871); } } while (false);
872#if DEBUG1
873  if (aTargetFrame && aTargetFrame->IsGeneratedContentFrame()) {
874    nsCOMPtr<nsIContent> targetContent;
875    aTargetFrame->GetContentForEvent(aEvent, getter_AddRefs(targetContent));
876    MOZ_ASSERT(aTargetContent == targetContent,do { static_assert( mozilla::detail::AssertionConditionType<
decltype(aTargetContent == targetContent)>::isValid, "invalid assertion condition"
); if ((__builtin_expect(!!(!(!!(aTargetContent == targetContent
))), 0))) { do { } while (false); MOZ_ReportAssertionFailure(
"aTargetContent == targetContent" " (" "Unexpected target for generated content frame!"
 ")", "/var/lib/jenkins/workspace/firefox-scan-build/dom/events/EventStateManager.cpp"
, 877); AnnotateMozCrashReason("MOZ_ASSERT" "(" "aTargetContent == targetContent"
 ") (" "Unexpected target for generated content frame!" ")");
 do { *((volatile int*)__null) = 877; __attribute__((nomerge)
) ::abort(); } while (false); } } while (false)
877               "Unexpected target for generated content frame!")do { static_assert( mozilla::detail::AssertionConditionType<
decltype(aTargetContent == targetContent)>::isValid, "invalid assertion condition"
); if ((__builtin_expect(!!(!(!!(aTargetContent == targetContent
))), 0))) { do { } while (false); MOZ_ReportAssertionFailure(
"aTargetContent == targetContent" " (" "Unexpected target for generated content frame!"
 ")", "/var/lib/jenkins/workspace/firefox-scan-build/dom/events/EventStateManager.cpp"
, 877); AnnotateMozCrashReason("MOZ_ASSERT" "(" "aTargetContent == targetContent"
 ") (" "Unexpected target for generated content frame!" ")");
 do { *((volatile int*)__null) = 877; __attribute__((nomerge)
) ::abort(); } while (false); } } while (false);
878  }
879#endif
880 
881  mCurrentTarget = aTargetFrame;
882  mCurrentTargetContent = nullptr;
883 
884  // Do not take account eMouseEnterIntoWidget/ExitFromWidget so that loading
885  // a page when user is not active doesn't change the state to active.
886  WidgetMouseEvent* mouseEvent = aEvent->AsMouseEvent();
887  if (aEvent->IsTrusted() &&
888      ((mouseEvent && mouseEvent->IsReal() &&
889        IsMessageMouseUserActivity(mouseEvent->mMessage)) ||
890       aEvent->mClass == eWheelEventClass ||
891       aEvent->mClass == ePointerEventClass ||
892       aEvent->mClass == eTouchEventClass ||
893       aEvent->mClass == eKeyboardEventClass ||
894       (aEvent->mClass == eDragEventClass && aEvent->mMessage == eDrop) ||
895       IsMessageGamepadUserActivity(aEvent->mMessage))) {
896    if (gMouseOrKeyboardEventCounter == 0) {
897      nsCOMPtr<nsIObserverService> obs =
898          mozilla::services::GetObserverService();
899      if (obs) {
900        obs->NotifyObservers(nullptr, "user-interaction-active", nullptr);
901        UpdateUserActivityTimer();
902      }
903    }
904    ++gMouseOrKeyboardEventCounter;
905 
906    nsCOMPtr<nsINode> node = aTargetContent;
907    if (node &&
908        ((aEvent->mMessage == eKeyUp && IsKeyboardEventUserActivity(aEvent)) ||
909         aEvent->mMessage == eMouseUp || aEvent->mMessage == eWheel ||
910         aEvent->mMessage == eTouchEnd || aEvent->mMessage == ePointerUp ||
911         aEvent->mMessage == eDrop)) {
912      Document* doc = node->OwnerDoc();
913      while (doc) {
914        doc->SetUserHasInteracted();
915        doc = nsContentUtils::IsChildOfSameType(doc)
916                  ? doc->GetInProcessParentDocument()
917                  : nullptr;
918      }
919    }
920  }
921 
922  WheelTransaction::OnEvent(aEvent);
923 
924  // Focus events don't necessarily need a frame.
925  if (!mCurrentTarget && !aTargetContent) {
926    NS_ERROR("mCurrentTarget and aTargetContent are null")do { NS_DebugBreak(NS_DEBUG_ASSERTION, "mCurrentTarget and aTargetContent are null"
, "Error", "/var/lib/jenkins/workspace/firefox-scan-build/dom/events/EventStateManager.cpp"
, 926); MOZ_PretendNoReturn(); } while (0);
927    return NS_ERROR_NULL_POINTER;
928  }
929#ifdef DEBUG1
930  if (aEvent->HasDragEventMessage() && PointerLockManager::IsLocked()) {
931    NS_ASSERTION(PointerLockManager::IsLocked(),do { if (!(PointerLockManager::IsLocked())) { NS_DebugBreak(NS_DEBUG_ASSERTION
, "Pointer is locked. Drag events should be suppressed when "
 "the pointer is locked.", "PointerLockManager::IsLocked()", "/var/lib/jenkins/workspace/firefox-scan-build/dom/events/EventStateManager.cpp"
, 933); MOZ_PretendNoReturn(); } } while (0)
932                 "Pointer is locked. Drag events should be suppressed when "do { if (!(PointerLockManager::IsLocked())) { NS_DebugBreak(NS_DEBUG_ASSERTION
, "Pointer is locked. Drag events should be suppressed when "
 "the pointer is locked.", "PointerLockManager::IsLocked()", "/var/lib/jenkins/workspace/firefox-scan-build/dom/events/EventStateManager.cpp"
, 933); MOZ_PretendNoReturn(); } } while (0)
933                 "the pointer is locked.")do { if (!(PointerLockManager::IsLocked())) { NS_DebugBreak(NS_DEBUG_ASSERTION
, "Pointer is locked. Drag events should be suppressed when "
 "the pointer is locked.", "PointerLockManager::IsLocked()", "/var/lib/jenkins/workspace/firefox-scan-build/dom/events/EventStateManager.cpp"
, 933); MOZ_PretendNoReturn(); } } while (0);
934  }
935#endif
936  // Store last known screenPoint and clientPoint so pointer lock
937  // can use these values as constants.
938  if (aEvent->IsTrusted() &&
939      ((mouseEvent && mouseEvent->IsReal()) ||
940       aEvent->mClass == eWheelEventClass) &&
941      !PointerLockManager::IsLocked()) {
942    // XXX Probably doesn't matter much, but storing these in CSS pixels instead
943    // of device pixels means behavior can be a bit odd if you zoom while
944    // pointer-locked.
945    sLastScreenPoint =
946        Event::GetScreenCoords(aPresContext, aEvent, aEvent->mRefPoint)
947            .extract();
948    sLastClientPoint = Event::GetClientCoords(
949        aPresContext, aEvent, aEvent->mRefPoint, CSSIntPoint(0, 0));
950  }
951 
952  *aStatus = nsEventStatus_eIgnore;
953 
954  if (aEvent->mClass == eQueryContentEventClass) {
955    HandleQueryContentEvent(aEvent->AsQueryContentEvent());
956    return NS_OK;
957  }
958 
959  WidgetTouchEvent* touchEvent = aEvent->AsTouchEvent();
960  if (touchEvent && mInTouchDrag) {
961    if (touchEvent->mMessage == eTouchMove) {
962      GenerateDragGesture(aPresContext, touchEvent);
963    } else {
964      mInTouchDrag = false;
965      StopTrackingDragGesture(true);
966    }
967  }
968 
969  if (mMouseEnterLeaveHelper && aEvent->IsTrusted()) {
970    // When the last `mouseover` event target is removed from the document,
971    // we makes mMouseEnterLeaveHelper update the last deepest `mouseenter`
972    // event target to the removed node parent and mark it as not the following
973    // `mouseout` event target.  However, the other browsers may dispatch
974    // `mouseout` on it if it's restored "immediately".  Therefore, we use
975    // the next animation frame as the deadline.  ContentRemoved() enqueues a
976    // synthesized `mousemove` to dispatch mouse boundary events under the
977    // mouse cursor soon and the synthesized event (or eMouseExitFromWidget if
978    // our window is moved) will reach here at latest the next animation frame.
979    // Therefore, we can use the event as the deadline.  If the removed last
980    // `mouseover` target is reconnected before a synthesized mouse event or
981    // a real mouse event, let's restore it as the following `mouseout` event
982    // target.  Otherwise, e.g., a keyboard event, let's forget it.
983    mMouseEnterLeaveHelper->TryToRestorePendingRemovedOverTarget(aEvent);
984  }
985 
986  static constexpr auto const allowSynthesisForTests = []() -> bool {
987    nsCOMPtr<nsIDragService> dragService =
988        do_GetService("@mozilla.org/widget/dragservice;1");
989    return dragService &&
990           !dragService->GetNeverAllowSessionIsSynthesizedForTests();
991  };
992 
993  switch (aEvent->mMessage) {
994    case eContextMenu:
995      if (PointerLockManager::IsLocked()) {
996        return NS_ERROR_DOM_INVALID_STATE_ERR;
997      }
998      break;
999    case eMouseTouchDrag:
1000      mInTouchDrag = true;
1001      BeginTrackingDragGesture(aPresContext, mouseEvent, aTargetFrame);
1002      break;
1003    case eMouseDown: {
1004      switch (mouseEvent->mButton) {
1005        case MouseButton::ePrimary:
1006          BeginTrackingDragGesture(aPresContext, mouseEvent, aTargetFrame);
1007          mLastLeftMouseDownInfo.mClickCount = mouseEvent->mClickCount;
1008          SetClickCount(mouseEvent, aStatus);
1009          sNormalLMouseEventInProcess = true;
1010          break;
1011        case MouseButton::eMiddle:
1012          mLastMiddleMouseDownInfo.mClickCount = mouseEvent->mClickCount;
1013          SetClickCount(mouseEvent, aStatus);
1014          break;
1015        case MouseButton::eSecondary:
1016          mLastRightMouseDownInfo.mClickCount = mouseEvent->mClickCount;
1017          SetClickCount(mouseEvent, aStatus);
1018          break;
1019      }
1020      if (!StaticPrefs::dom_popup_experimental()) {
1021        NotifyTargetUserActivation(aEvent, aTargetContent);
1022      }
1023      break;
1024    }
1025    case eMouseUp: {
1026      switch (mouseEvent->mButton) {
1027        case MouseButton::ePrimary:
1028          if (StaticPrefs::ui_click_hold_context_menus()) {
1029            KillClickHoldTimer();
1030          }
1031          mInTouchDrag = false;
1032          StopTrackingDragGesture(true);
1033          sNormalLMouseEventInProcess = false;
1034          // then fall through...
1035          [[fallthrough]];
1036        case MouseButton::eSecondary:
1037        case MouseButton::eMiddle:
1038          RefPtr<EventStateManager> esm =
1039              ESMFromContentOrThis(aOverrideClickTarget);
1040          esm->SetClickCount(mouseEvent, aStatus, aOverrideClickTarget);
1041          break;
1042      }
1043      break;
1044    }
1045    case eMouseEnterIntoWidget:
1046      PointerEventHandler::UpdateActivePointerState(mouseEvent, aTargetContent);
1047      // In some cases on e10s eMouseEnterIntoWidget
1048      // event was sent twice into child process of content.
1049      // (From specific widget code (sending is not permanent) and
1050      // from ESM::DispatchMouseOrPointerBoundaryEvent (sending is permanent)).
1051      // IsCrossProcessForwardingStopped() helps to suppress sending accidental
1052      // event from widget code.
1053      aEvent->StopCrossProcessForwarding();
1054      break;
1055    case eMouseExitFromWidget:
1056      // If this is a remote frame, we receive eMouseExitFromWidget from the
1057      // parent the mouse exits our content. Since the parent may update the
1058      // cursor while the mouse is outside our frame, and since PuppetWidget
1059      // caches the current cursor internally, re-entering our content (say from
1060      // over a window edge) wont update the cursor if the cached value and the
1061      // current cursor match. So when the mouse exits a remote frame, clear the
1062      // cached widget cursor so a proper update will occur when the mouse
1063      // re-enters.
1064      if (XRE_IsContentProcess()) {
1065        ClearCachedWidgetCursor(mCurrentTarget);
1066      }
1067 
1068      // IsCrossProcessForwardingStopped() helps to suppress double event
1069      // sending into process of content. For more information see comment
1070      // above, at eMouseEnterIntoWidget case.
1071      aEvent->StopCrossProcessForwarding();
1072 
1073      // If the event is not a top-level window or puppet widget exit, then it's
1074      // not really an exit --- we may have traversed widget boundaries but
1075      // we're still in our toplevel window or puppet widget.
1076      if (mouseEvent->mExitFrom.value() !=
1077              WidgetMouseEvent::ePlatformTopLevel &&
1078          mouseEvent->mExitFrom.value() != WidgetMouseEvent::ePuppet) {
1079        // Treat it as a synthetic move so we don't generate spurious
1080        // "exit" or "move" events.  Any necessary "out" or "over" events
1081        // will be generated by GenerateMouseEnterExit
1082        mouseEvent->mMessage = eMouseMove;
1083        mouseEvent->mReason = WidgetMouseEvent::eSynthesized;
1084        // then fall through...
1085      } else {
1086        MOZ_ASSERT_IF(XRE_IsParentProcess(),do { if (XRE_IsParentProcess()) { do { static_assert( mozilla
::detail::AssertionConditionType<decltype(mouseEvent->mExitFrom
.value() == WidgetMouseEvent::ePlatformTopLevel)>::isValid
, "invalid assertion condition"); if ((__builtin_expect(!!(!(
!!(mouseEvent->mExitFrom.value() == WidgetMouseEvent::ePlatformTopLevel
))), 0))) { do { } while (false); MOZ_ReportAssertionFailure(
"mouseEvent->mExitFrom.value() == WidgetMouseEvent::ePlatformTopLevel"
, "/var/lib/jenkins/workspace/firefox-scan-build/dom/events/EventStateManager.cpp"
, 1088); AnnotateMozCrashReason("MOZ_ASSERT" "(" "mouseEvent->mExitFrom.value() == WidgetMouseEvent::ePlatformTopLevel"
 ")"); do { *((volatile int*)__null) = 1088; __attribute__((nomerge
)) ::abort(); } while (false); } } while (false); } } while (
false)
1087                      mouseEvent->mExitFrom.value() ==do { if (XRE_IsParentProcess()) { do { static_assert( mozilla
::detail::AssertionConditionType<decltype(mouseEvent->mExitFrom
.value() == WidgetMouseEvent::ePlatformTopLevel)>::isValid
, "invalid assertion condition"); if ((__builtin_expect(!!(!(
!!(mouseEvent->mExitFrom.value() == WidgetMouseEvent::ePlatformTopLevel
))), 0))) { do { } while (false); MOZ_ReportAssertionFailure(
"mouseEvent->mExitFrom.value() == WidgetMouseEvent::ePlatformTopLevel"
, "/var/lib/jenkins/workspace/firefox-scan-build/dom/events/EventStateManager.cpp"
, 1088); AnnotateMozCrashReason("MOZ_ASSERT" "(" "mouseEvent->mExitFrom.value() == WidgetMouseEvent::ePlatformTopLevel"
 ")"); do { *((volatile int*)__null) = 1088; __attribute__((nomerge
)) ::abort(); } while (false); } } while (false); } } while (
false)
1088                          WidgetMouseEvent::ePlatformTopLevel)do { if (XRE_IsParentProcess()) { do { static_assert( mozilla
::detail::AssertionConditionType<decltype(mouseEvent->mExitFrom
.value() == WidgetMouseEvent::ePlatformTopLevel)>::isValid
, "invalid assertion condition"); if ((__builtin_expect(!!(!(
!!(mouseEvent->mExitFrom.value() == WidgetMouseEvent::ePlatformTopLevel
))), 0))) { do { } while (false); MOZ_ReportAssertionFailure(
"mouseEvent->mExitFrom.value() == WidgetMouseEvent::ePlatformTopLevel"
, "/var/lib/jenkins/workspace/firefox-scan-build/dom/events/EventStateManager.cpp"
, 1088); AnnotateMozCrashReason("MOZ_ASSERT" "(" "mouseEvent->mExitFrom.value() == WidgetMouseEvent::ePlatformTopLevel"
 ")"); do { *((volatile int*)__null) = 1088; __attribute__((nomerge
)) ::abort(); } while (false); } } while (false); } } while (
false);
1089        MOZ_ASSERT_IF(XRE_IsContentProcess(), mouseEvent->mExitFrom.value() ==do { if (XRE_IsContentProcess()) { do { static_assert( mozilla
::detail::AssertionConditionType<decltype(mouseEvent->mExitFrom
.value() == WidgetMouseEvent::ePuppet)>::isValid, "invalid assertion condition"
); if ((__builtin_expect(!!(!(!!(mouseEvent->mExitFrom.value
() == WidgetMouseEvent::ePuppet))), 0))) { do { } while (false
); MOZ_ReportAssertionFailure("mouseEvent->mExitFrom.value() == WidgetMouseEvent::ePuppet"
, "/var/lib/jenkins/workspace/firefox-scan-build/dom/events/EventStateManager.cpp"
, 1090); AnnotateMozCrashReason("MOZ_ASSERT" "(" "mouseEvent->mExitFrom.value() == WidgetMouseEvent::ePuppet"
 ")"); do { *((volatile int*)__null) = 1090; __attribute__((nomerge
)) ::abort(); } while (false); } } while (false); } } while (
false)
1090                                                  WidgetMouseEvent::ePuppet)do { if (XRE_IsContentProcess()) { do { static_assert( mozilla
::detail::AssertionConditionType<decltype(mouseEvent->mExitFrom
.value() == WidgetMouseEvent::ePuppet)>::isValid, "invalid assertion condition"
); if ((__builtin_expect(!!(!(!!(mouseEvent->mExitFrom.value
() == WidgetMouseEvent::ePuppet))), 0))) { do { } while (false
); MOZ_ReportAssertionFailure("mouseEvent->mExitFrom.value() == WidgetMouseEvent::ePuppet"
, "/var/lib/jenkins/workspace/firefox-scan-build/dom/events/EventStateManager.cpp"
, 1090); AnnotateMozCrashReason("MOZ_ASSERT" "(" "mouseEvent->mExitFrom.value() == WidgetMouseEvent::ePuppet"
 ")"); do { *((volatile int*)__null) = 1090; __attribute__((nomerge
)) ::abort(); } while (false); } } while (false); } } while (
false);
1091        // We should synthetize corresponding pointer events
1092        GeneratePointerEnterExit(ePointerLeave, mouseEvent);
1093        GenerateMouseEnterExit(mouseEvent);
1094        // This is really an exit and should stop here
1095        aEvent->mMessage = eVoidEvent;
1096        break;
1097      }
1098      [[fallthrough]];
1099    case eMouseMove:
1100    case ePointerDown:
1101      if (aEvent->mMessage == ePointerDown) {
1102        PointerEventHandler::UpdateActivePointerState(mouseEvent,
1103                                                      aTargetContent);
1104        PointerEventHandler::ImplicitlyCapturePointer(aTargetFrame, aEvent);
1105        if (StaticPrefs::dom_popup_experimental()) {
1106          // https://html.spec.whatwg.org/multipage/interaction.html#activation-triggering-input-event
1107          if (mouseEvent->mInputSource ==
1108              MouseEvent_Binding::MOZ_SOURCE_MOUSE) {
1109            NotifyTargetUserActivation(aEvent, aTargetContent);
1110          }
1111        } else if (mouseEvent->mInputSource !=
1112                   MouseEvent_Binding::MOZ_SOURCE_TOUCH) {
1113          NotifyTargetUserActivation(aEvent, aTargetContent);
1114        }
1115 
1116        LightDismissOpenPopovers(aEvent, aTargetContent);
1117      }
1118      [[fallthrough]];
1119    case ePointerMove: {
1120      if (!mInTouchDrag &&
1121          PointerEventHandler::IsDragAndDropEnabled(*mouseEvent)) {
1122        GenerateDragGesture(aPresContext, mouseEvent);
1123      }
1124      // on the Mac, GenerateDragGesture() may not return until the drag
1125      // has completed and so |aTargetFrame| may have been deleted (moving
1126      // a bookmark, for example).  If this is the case, however, we know
1127      // that ClearFrameRefs() has been called and it cleared out
1128      // |mCurrentTarget|. As a result, we should pass |mCurrentTarget|
1129      // into UpdateCursor().
1130      UpdateCursor(aPresContext, mouseEvent, mCurrentTarget, aStatus);
1131 
1132      UpdateLastRefPointOfMouseEvent(mouseEvent);
1133      if (PointerLockManager::IsLocked()) {
1134        ResetPointerToWindowCenterWhilePointerLocked(mouseEvent);
1135      }
1136      UpdateLastPointerPosition(mouseEvent);
1137 
1138      GenerateMouseEnterExit(mouseEvent);
1139      // Flush pending layout changes, so that later mouse move events
1140      // will go to the right nodes.
1141      FlushLayout(aPresContext);
1142      break;
1143    }
1144    case ePointerUp:
1145      LightDismissOpenPopovers(aEvent, aTargetContent);
1146      GenerateMouseEnterExit(mouseEvent);
1147      if (StaticPrefs::dom_popup_experimental() &&
1148          mouseEvent->mInputSource != MouseEvent_Binding::MOZ_SOURCE_MOUSE) {
1149        NotifyTargetUserActivation(aEvent, aTargetContent);
1150      }
1151      break;
1152    case ePointerGotCapture:
1153      GenerateMouseEnterExit(mouseEvent);
1154      break;
1155    case eDragStart:
1156      if (StaticPrefs::ui_click_hold_context_menus()) {
1157        // an external drag gesture event came in, not generated internally
1158        // by Gecko. Make sure we get rid of the click-hold timer.
1159        KillClickHoldTimer();
1160      }
1161      break;
1162    case eDragOver: {
1163      WidgetDragEvent* dragEvent = aEvent->AsDragEvent();
1164      MOZ_ASSERT(dragEvent)do { static_assert( mozilla::detail::AssertionConditionType<
decltype(dragEvent)>::isValid, "invalid assertion condition"
); if ((__builtin_expect(!!(!(!!(dragEvent))), 0))) { do { } while
 (false); MOZ_ReportAssertionFailure("dragEvent", "/var/lib/jenkins/workspace/firefox-scan-build/dom/events/EventStateManager.cpp"
, 1164); AnnotateMozCrashReason("MOZ_ASSERT" "(" "dragEvent" ")"
); do { *((volatile int*)__null) = 1164; __attribute__((nomerge
)) ::abort(); } while (false); } } while (false);
1165      if (dragEvent->mFlags.mIsSynthesizedForTests &&
1166          allowSynthesisForTests()) {
1167        dragEvent->InitDropEffectForTests();
1168      }
1169      // Send the enter/exit events before eDrop.
1170      GenerateDragDropEnterExit(aPresContext, dragEvent);
1171      break;
1172    }
1173    case eDrop: {
1174      if (aEvent->mFlags.mIsSynthesizedForTests && allowSynthesisForTests()) {
1175        MOZ_ASSERT(aEvent->AsDragEvent())do { static_assert( mozilla::detail::AssertionConditionType<
decltype(aEvent->AsDragEvent())>::isValid, "invalid assertion condition"
); if ((__builtin_expect(!!(!(!!(aEvent->AsDragEvent()))),
 0))) { do { } while (false); MOZ_ReportAssertionFailure("aEvent->AsDragEvent()"
, "/var/lib/jenkins/workspace/firefox-scan-build/dom/events/EventStateManager.cpp"
, 1175); AnnotateMozCrashReason("MOZ_ASSERT" "(" "aEvent->AsDragEvent()"
 ")"); do { *((volatile int*)__null) = 1175; __attribute__((nomerge
)) ::abort(); } while (false); } } while (false);
1176        aEvent->AsDragEvent()->InitDropEffectForTests();
1177      }
1178      break;
1179    }
1180    case eKeyPress: {
1181      WidgetKeyboardEvent* keyEvent = aEvent->AsKeyboardEvent();
1182      if (keyEvent->ModifiersMatchWithAccessKey(AccessKeyType::eChrome) ||
1183          keyEvent->ModifiersMatchWithAccessKey(AccessKeyType::eContent)) {
1184        // If the eKeyPress event will be sent to a remote process, this
1185        // process needs to wait reply from the remote process for checking if
1186        // preceding eKeyDown event is consumed.  If preceding eKeyDown event
1187        // is consumed in the remote process, BrowserChild won't send the event
1188        // back to this process.  So, only when this process receives a reply
1189        // eKeyPress event in BrowserParent, we should handle accesskey in this
1190        // process.
1191        if (IsTopLevelRemoteTarget(GetFocusedElement())) {
1192          // However, if there is no accesskey target for the key combination,
1193          // we don't need to wait reply from the remote process.  Otherwise,
1194          // Mark the event as waiting reply from remote process and stop
1195          // propagation in this process.
1196          if (CheckIfEventMatchesAccessKey(keyEvent, aPresContext)) {
1197            keyEvent->StopPropagation();
1198            keyEvent->MarkAsWaitingReplyFromRemoteProcess();
1199          }
1200        }
1201        // If the event target is in this process, we can handle accesskey now
1202        // since if preceding eKeyDown event was consumed, eKeyPress event
1203        // won't be dispatched by widget.  So, coming eKeyPress event means
1204        // that the preceding eKeyDown event wasn't consumed in this case.
1205        else {
1206          AutoTArray<uint32_t, 10> accessCharCodes;
1207          keyEvent->GetAccessKeyCandidates(accessCharCodes);
1208 
1209          if (HandleAccessKey(keyEvent, aPresContext, accessCharCodes)) {
1210            *aStatus = nsEventStatus_eConsumeNoDefault;
1211          }
1212        }
1213      }
1214    }
1215      // then fall through...
1216      [[fallthrough]];
1217    case eKeyDown:
1218      if (aEvent->mMessage == eKeyDown) {
1219        NotifyTargetUserActivation(aEvent, aTargetContent);
1220      }
1221      [[fallthrough]];
1222    case eKeyUp: {
1223      Element* element = GetFocusedElement();
1224      if (element) {
1225        mCurrentTargetContent = element;
1226      }
1227 
1228      // NOTE: Don't refer TextComposition::IsComposing() since UI Events
1229      //       defines that KeyboardEvent.isComposing is true when it's
1230      //       dispatched after compositionstart and compositionend.
1231      //       TextComposition::IsComposing() is false even before
1232      //       compositionend if there is no composing string.
1233      //       And also don't expose other document's composition state.
1234      //       A native IME context is typically shared by multiple documents.
1235      //       So, don't use GetTextCompositionFor(nsIWidget*) here.
1236      RefPtr<TextComposition> composition =
1237          IMEStateManager::GetTextCompositionFor(aPresContext);
1238      aEvent->AsKeyboardEvent()->mIsComposing = !!composition;
1239 
1240      // Widget may need to perform default action for specific keyboard
1241      // event if it's not consumed.  In this case, widget has already marked
1242      // the event as "waiting reply from remote process".  However, we need
1243      // to reset it if the target (focused content) isn't in a remote process
1244      // because PresShell needs to check if it's marked as so before
1245      // dispatching events into the DOM tree.
1246      if (aEvent->IsWaitingReplyFromRemoteProcess() &&
1247          !aEvent->PropagationStopped() && !IsTopLevelRemoteTarget(element)) {
1248        aEvent->ResetWaitingReplyFromRemoteProcessState();
1249      }
1250    } break;
1251    case eWheel:
1252    case eWheelOperationStart:
1253    case eWheelOperationEnd: {
1254      NS_ASSERTION(aEvent->IsTrusted(),do { if (!(aEvent->IsTrusted())) { NS_DebugBreak(NS_DEBUG_ASSERTION
, "Untrusted wheel event shouldn't be here", "aEvent->IsTrusted()"
, "/var/lib/jenkins/workspace/firefox-scan-build/dom/events/EventStateManager.cpp"
, 1255); MOZ_PretendNoReturn(); } } while (0)
1255                   "Untrusted wheel event shouldn't be here")do { if (!(aEvent->IsTrusted())) { NS_DebugBreak(NS_DEBUG_ASSERTION
, "Untrusted wheel event shouldn't be here", "aEvent->IsTrusted()"
, "/var/lib/jenkins/workspace/firefox-scan-build/dom/events/EventStateManager.cpp"
, 1255); MOZ_PretendNoReturn(); } } while (0);
1256      using DeltaModeCheckingState = WidgetWheelEvent::DeltaModeCheckingState;
1257 
1258      if (Element* element = GetFocusedElement()) {
1259        mCurrentTargetContent = element;
1260      }
1261 
1262      if (aEvent->mMessage != eWheel) {
1263        break;
1264      }
1265 
1266      WidgetWheelEvent* wheelEvent = aEvent->AsWheelEvent();
1267      WheelPrefs::GetInstance()->ApplyUserPrefsToDelta(wheelEvent);
1268 
1269      // If we won't dispatch a DOM event for this event, nothing to do anymore.
1270      if (!wheelEvent->IsAllowedToDispatchDOMEvent()) {
1271        break;
1272      }
1273 
1274      if (StaticPrefs::dom_event_wheel_deltaMode_lines_always_disabled()) {
1275        wheelEvent->mDeltaModeCheckingState = DeltaModeCheckingState::Unchecked;
1276      } else if (ShouldAlwaysUseLineDeltas()) {
1277        wheelEvent->mDeltaModeCheckingState = DeltaModeCheckingState::Checked;
1278      } else {
1279        wheelEvent->mDeltaModeCheckingState = DeltaModeCheckingState::Unknown;
1280      }
1281 
1282      // Init lineOrPageDelta values for line scroll events for some devices
1283      // on some platforms which might dispatch wheel events which don't
1284      // have lineOrPageDelta values.  And also, if delta values are
1285      // customized by prefs, this recomputes them.
1286      DeltaAccumulator::GetInstance()->InitLineOrPageDelta(aTargetFrame, this,
1287                                                           wheelEvent);
1288    } break;
1289    case eSetSelection: {
1290      RefPtr<Element> focuedElement = GetFocusedElement();
1291      IMEStateManager::HandleSelectionEvent(aPresContext, focuedElement,
1292                                            aEvent->AsSelectionEvent());
1293      break;
1294    }
1295    case eContentCommandCut:
1296    case eContentCommandCopy:
1297    case eContentCommandPaste:
1298    case eContentCommandDelete:
1299    case eContentCommandUndo:
1300    case eContentCommandRedo:
1301    case eContentCommandPasteTransferable:
1302    case eContentCommandLookUpDictionary:
1303      DoContentCommandEvent(aEvent->AsContentCommandEvent());
1304      break;
1305    case eContentCommandInsertText:
1306      DoContentCommandInsertTextEvent(aEvent->AsContentCommandEvent());
1307      break;
1308    case eContentCommandReplaceText:
1309      DoContentCommandReplaceTextEvent(aEvent->AsContentCommandEvent());
1310      break;
1311    case eContentCommandScroll:
1312      DoContentCommandScrollEvent(aEvent->AsContentCommandEvent());
1313      break;
1314    case eCompositionStart:
1315      if (aEvent->IsTrusted()) {
1316        // If the event is trusted event, set the selected text to data of
1317        // composition event.
1318        WidgetCompositionEvent* compositionEvent = aEvent->AsCompositionEvent();
1319        WidgetQueryContentEvent querySelectedTextEvent(
1320            true, eQuerySelectedText, compositionEvent->mWidget);
1321        HandleQueryContentEvent(&querySelectedTextEvent);
1322        if (querySelectedTextEvent.FoundSelection()) {
1323          compositionEvent->mData = querySelectedTextEvent.mReply->DataRef();
1324        }
1325        NS_ASSERTION(querySelectedTextEvent.Succeeded(),do { if (!(querySelectedTextEvent.Succeeded())) { NS_DebugBreak
(NS_DEBUG_ASSERTION, "Failed to get selected text", "querySelectedTextEvent.Succeeded()"
, "/var/lib/jenkins/workspace/firefox-scan-build/dom/events/EventStateManager.cpp"
, 1326); MOZ_PretendNoReturn(); } } while (0)
1326                     "Failed to get selected text")do { if (!(querySelectedTextEvent.Succeeded())) { NS_DebugBreak
(NS_DEBUG_ASSERTION, "Failed to get selected text", "querySelectedTextEvent.Succeeded()"
, "/var/lib/jenkins/workspace/firefox-scan-build/dom/events/EventStateManager.cpp"
, 1326); MOZ_PretendNoReturn(); } } while (0);
1327      }
1328      break;
1329    case eTouchStart:
1330      SetGestureDownPoint(aEvent->AsTouchEvent());
1331      break;
1332    case eTouchEnd:
1333      if (!StaticPrefs::dom_popup_experimental()) {
1334        NotifyTargetUserActivation(aEvent, aTargetContent);
1335      }
1336      break;
1337    default:
1338      break;
1339  }
1340  return NS_OK;
1341}
1342 
1343// Returns true if this event is likely an user activation for a link or
1344// a link-like button, where modifier keys are likely be used for controlling
1345// where the link is opened.
1346//
1347// The modifiers associated with the user activation is used for controlling
1348// where the `window.open` is opened into.
1349static bool CanReflectModifiersToUserActivation(WidgetInputEvent* aEvent) {
1350  if (StaticPrefs::dom_popup_experimental()) {
1351    MOZ_ASSERT(aEvent->mMessage == eKeyDown ||do { static_assert( mozilla::detail::AssertionConditionType<
decltype(aEvent->mMessage == eKeyDown || aEvent->mMessage
 == ePointerDown || aEvent->mMessage == ePointerUp)>::isValid
, "invalid assertion condition"); if ((__builtin_expect(!!(!(
!!(aEvent->mMessage == eKeyDown || aEvent->mMessage == ePointerDown
 || aEvent->mMessage == ePointerUp))), 0))) { do { } while
 (false); MOZ_ReportAssertionFailure("aEvent->mMessage == eKeyDown || aEvent->mMessage == ePointerDown || aEvent->mMessage == ePointerUp"
, "/var/lib/jenkins/workspace/firefox-scan-build/dom/events/EventStateManager.cpp"
, 1353); AnnotateMozCrashReason("MOZ_ASSERT" "(" "aEvent->mMessage == eKeyDown || aEvent->mMessage == ePointerDown || aEvent->mMessage == ePointerUp"
 ")"); do { *((volatile int*)__null) = 1353; __attribute__((nomerge
)) ::abort(); } while (false); } } while (false)
1352               aEvent->mMessage == ePointerDown ||do { static_assert( mozilla::detail::AssertionConditionType<
decltype(aEvent->mMessage == eKeyDown || aEvent->mMessage
 == ePointerDown || aEvent->mMessage == ePointerUp)>::isValid
, "invalid assertion condition"); if ((__builtin_expect(!!(!(
!!(aEvent->mMessage == eKeyDown || aEvent->mMessage == ePointerDown
 || aEvent->mMessage == ePointerUp))), 0))) { do { } while
 (false); MOZ_ReportAssertionFailure("aEvent->mMessage == eKeyDown || aEvent->mMessage == ePointerDown || aEvent->mMessage == ePointerUp"
, "/var/lib/jenkins/workspace/firefox-scan-build/dom/events/EventStateManager.cpp"
, 1353); AnnotateMozCrashReason("MOZ_ASSERT" "(" "aEvent->mMessage == eKeyDown || aEvent->mMessage == ePointerDown || aEvent->mMessage == ePointerUp"
 ")"); do { *((volatile int*)__null) = 1353; __attribute__((nomerge
)) ::abort(); } while (false); } } while (false)
1353               aEvent->mMessage == ePointerUp)do { static_assert( mozilla::detail::AssertionConditionType<
decltype(aEvent->mMessage == eKeyDown || aEvent->mMessage
 == ePointerDown || aEvent->mMessage == ePointerUp)>::isValid
, "invalid assertion condition"); if ((__builtin_expect(!!(!(
!!(aEvent->mMessage == eKeyDown || aEvent->mMessage == ePointerDown
 || aEvent->mMessage == ePointerUp))), 0))) { do { } while
 (false); MOZ_ReportAssertionFailure("aEvent->mMessage == eKeyDown || aEvent->mMessage == ePointerDown || aEvent->mMessage == ePointerUp"
, "/var/lib/jenkins/workspace/firefox-scan-build/dom/events/EventStateManager.cpp"
, 1353); AnnotateMozCrashReason("MOZ_ASSERT" "(" "aEvent->mMessage == eKeyDown || aEvent->mMessage == ePointerDown || aEvent->mMessage == ePointerUp"
 ")"); do { *((volatile int*)__null) = 1353; __attribute__((nomerge
)) ::abort(); } while (false); } } while (false);
1354  } else {
1355    MOZ_ASSERT(aEvent->mMessage == eKeyDown || aEvent->mMessage == eMouseDown ||do { static_assert( mozilla::detail::AssertionConditionType<
decltype(aEvent->mMessage == eKeyDown || aEvent->mMessage
 == eMouseDown || aEvent->mMessage == ePointerDown || aEvent
->mMessage == eTouchEnd)>::isValid, "invalid assertion condition"
); if ((__builtin_expect(!!(!(!!(aEvent->mMessage == eKeyDown
 || aEvent->mMessage == eMouseDown || aEvent->mMessage ==
 ePointerDown || aEvent->mMessage == eTouchEnd))), 0))) { do
 { } while (false); MOZ_ReportAssertionFailure("aEvent->mMessage == eKeyDown || aEvent->mMessage == eMouseDown || aEvent->mMessage == ePointerDown || aEvent->mMessage == eTouchEnd"
, "/var/lib/jenkins/workspace/firefox-scan-build/dom/events/EventStateManager.cpp"
, 1357); AnnotateMozCrashReason("MOZ_ASSERT" "(" "aEvent->mMessage == eKeyDown || aEvent->mMessage == eMouseDown || aEvent->mMessage == ePointerDown || aEvent->mMessage == eTouchEnd"
 ")"); do { *((volatile int*)__null) = 1357; __attribute__((nomerge
)) ::abort(); } while (false); } } while (false)
1356               aEvent->mMessage == ePointerDown ||do { static_assert( mozilla::detail::AssertionConditionType<
decltype(aEvent->mMessage == eKeyDown || aEvent->mMessage
 == eMouseDown || aEvent->mMessage == ePointerDown || aEvent
->mMessage == eTouchEnd)>::isValid, "invalid assertion condition"
); if ((__builtin_expect(!!(!(!!(aEvent->mMessage == eKeyDown
 || aEvent->mMessage == eMouseDown || aEvent->mMessage ==
 ePointerDown || aEvent->mMessage == eTouchEnd))), 0))) { do
 { } while (false); MOZ_ReportAssertionFailure("aEvent->mMessage == eKeyDown || aEvent->mMessage == eMouseDown || aEvent->mMessage == ePointerDown || aEvent->mMessage == eTouchEnd"
, "/var/lib/jenkins/workspace/firefox-scan-build/dom/events/EventStateManager.cpp"
, 1357); AnnotateMozCrashReason("MOZ_ASSERT" "(" "aEvent->mMessage == eKeyDown || aEvent->mMessage == eMouseDown || aEvent->mMessage == ePointerDown || aEvent->mMessage == eTouchEnd"
 ")"); do { *((volatile int*)__null) = 1357; __attribute__((nomerge
)) ::abort(); } while (false); } } while (false)
1357               aEvent->mMessage == eTouchEnd)do { static_assert( mozilla::detail::AssertionConditionType<
decltype(aEvent->mMessage == eKeyDown || aEvent->mMessage
 == eMouseDown || aEvent->mMessage == ePointerDown || aEvent
->mMessage == eTouchEnd)>::isValid, "invalid assertion condition"
); if ((__builtin_expect(!!(!(!!(aEvent->mMessage == eKeyDown
 || aEvent->mMessage == eMouseDown || aEvent->mMessage ==
 ePointerDown || aEvent->mMessage == eTouchEnd))), 0))) { do
 { } while (false); MOZ_ReportAssertionFailure("aEvent->mMessage == eKeyDown || aEvent->mMessage == eMouseDown || aEvent->mMessage == ePointerDown || aEvent->mMessage == eTouchEnd"
, "/var/lib/jenkins/workspace/firefox-scan-build/dom/events/EventStateManager.cpp"
, 1357); AnnotateMozCrashReason("MOZ_ASSERT" "(" "aEvent->mMessage == eKeyDown || aEvent->mMessage == eMouseDown || aEvent->mMessage == ePointerDown || aEvent->mMessage == eTouchEnd"
 ")"); do { *((volatile int*)__null) = 1357; __attribute__((nomerge
)) ::abort(); } while (false); } } while (false);
1358  }
1359 
1360  WidgetKeyboardEvent* keyEvent = aEvent->AsKeyboardEvent();
1361  if (keyEvent) {
1362    return keyEvent->CanReflectModifiersToUserActivation();
1363  }
1364 
1365  return true;
1366}
1367 
1368void EventStateManager::NotifyTargetUserActivation(WidgetEvent* aEvent,
1369                                                   nsIContent* aTargetContent) {
1370  if (!aEvent->IsTrusted()) {
1371    return;
1372  }
1373 
1374  WidgetMouseEvent* mouseEvent = aEvent->AsMouseEvent();
1375  if (mouseEvent && !mouseEvent->IsReal()) {
1376    return;
1377  }
1378 
1379  nsCOMPtr<nsINode> node = aTargetContent;
1380  if (!node) {
1381    return;
1382  }
1383 
1384  Document* doc = node->OwnerDoc();
1385  if (!doc) {
1386    return;
1387  }
1388 
1389  // Don't gesture activate for key events for keys which are likely
1390  // to be interaction with the browser, OS.
1391  WidgetKeyboardEvent* keyEvent = aEvent->AsKeyboardEvent();
1392  if (keyEvent && !keyEvent->CanUserGestureActivateTarget()) {
1393    return;
1394  }
1395 
1396  // Touch gestures that end outside the drag target were touches that turned
1397  // into scroll/pan/swipe actions. We don't want to gesture activate on such
1398  // actions, we want to only gesture activate on touches that are taps.
1399  // That is, touches that end in roughly the same place that they started.
1400  if ((aEvent->mMessage == eTouchEnd ||
1401       (aEvent->mMessage == ePointerUp &&
1402        aEvent->AsPointerEvent()->mInputSource ==
1403            MouseEvent_Binding::MOZ_SOURCE_TOUCH)) &&
1404      IsEventOutsideDragThreshold(aEvent->AsInputEvent())) {
1405    return;
1406  }
1407 
1408  // Do not treat the click on scrollbar as a user interaction with the web
1409  // content.
1410  if (StaticPrefs::dom_user_activation_ignore_scrollbars() &&
1411      ((StaticPrefs::dom_popup_experimental() &&
1412        (aEvent->mMessage == ePointerDown || aEvent->mMessage == ePointerUp)) ||
1413       (!StaticPrefs::dom_popup_experimental() &&
1414        (aEvent->mMessage == eMouseDown ||
1415         aEvent->mMessage == ePointerDown))) &&
1416      aTargetContent->IsInNativeAnonymousSubtree()) {
1417    nsIContent* current = aTargetContent;
1418    do {
1419      nsIContent* root = current->GetClosestNativeAnonymousSubtreeRoot();
1420      if (!root) {
1421        break;
1422      }
1423      if (root->IsXULElement(nsGkAtoms::scrollbar)) {
1424        return;
1425      }
1426      current = root->GetParent();
1427    } while (current);
1428  }
1429 
1430#ifdef DEBUG1
1431  if (StaticPrefs::dom_popup_experimental()) {
1432    MOZ_ASSERT(aEvent->mMessage == eKeyDown ||do { static_assert( mozilla::detail::AssertionConditionType<
decltype(aEvent->mMessage == eKeyDown || aEvent->mMessage
 == ePointerDown || aEvent->mMessage == ePointerUp)>::isValid
, "invalid assertion condition"); if ((__builtin_expect(!!(!(
!!(aEvent->mMessage == eKeyDown || aEvent->mMessage == ePointerDown
 || aEvent->mMessage == ePointerUp))), 0))) { do { } while
 (false); MOZ_ReportAssertionFailure("aEvent->mMessage == eKeyDown || aEvent->mMessage == ePointerDown || aEvent->mMessage == ePointerUp"
, "/var/lib/jenkins/workspace/firefox-scan-build/dom/events/EventStateManager.cpp"
, 1434); AnnotateMozCrashReason("MOZ_ASSERT" "(" "aEvent->mMessage == eKeyDown || aEvent->mMessage == ePointerDown || aEvent->mMessage == ePointerUp"
 ")"); do { *((volatile int*)__null) = 1434; __attribute__((nomerge
)) ::abort(); } while (false); } } while (false)
1433               aEvent->mMessage == ePointerDown ||do { static_assert( mozilla::detail::AssertionConditionType<
decltype(aEvent->mMessage == eKeyDown || aEvent->mMessage
 == ePointerDown || aEvent->mMessage == ePointerUp)>::isValid
, "invalid assertion condition"); if ((__builtin_expect(!!(!(
!!(aEvent->mMessage == eKeyDown || aEvent->mMessage == ePointerDown
 || aEvent->mMessage == ePointerUp))), 0))) { do { } while
 (false); MOZ_ReportAssertionFailure("aEvent->mMessage == eKeyDown || aEvent->mMessage == ePointerDown || aEvent->mMessage == ePointerUp"
, "/var/lib/jenkins/workspace/firefox-scan-build/dom/events/EventStateManager.cpp"
, 1434); AnnotateMozCrashReason("MOZ_ASSERT" "(" "aEvent->mMessage == eKeyDown || aEvent->mMessage == ePointerDown || aEvent->mMessage == ePointerUp"
 ")"); do { *((volatile int*)__null) = 1434; __attribute__((nomerge
)) ::abort(); } while (false); } } while (false)
1434               aEvent->mMessage == ePointerUp)do { static_assert( mozilla::detail::AssertionConditionType<
decltype(aEvent->mMessage == eKeyDown || aEvent->mMessage
 == ePointerDown || aEvent->mMessage == ePointerUp)>::isValid
, "invalid assertion condition"); if ((__builtin_expect(!!(!(
!!(aEvent->mMessage == eKeyDown || aEvent->mMessage == ePointerDown
 || aEvent->mMessage == ePointerUp))), 0))) { do { } while
 (false); MOZ_ReportAssertionFailure("aEvent->mMessage == eKeyDown || aEvent->mMessage == ePointerDown || aEvent->mMessage == ePointerUp"
, "/var/lib/jenkins/workspace/firefox-scan-build/dom/events/EventStateManager.cpp"
, 1434); AnnotateMozCrashReason("MOZ_ASSERT" "(" "aEvent->mMessage == eKeyDown || aEvent->mMessage == ePointerDown || aEvent->mMessage == ePointerUp"
 ")"); do { *((volatile int*)__null) = 1434; __attribute__((nomerge
)) ::abort(); } while (false); } } while (false);
1435  } else {
1436    MOZ_ASSERT(aEvent->mMessage == eKeyDown || aEvent->mMessage == eMouseDown ||do { static_assert( mozilla::detail::AssertionConditionType<
decltype(aEvent->mMessage == eKeyDown || aEvent->mMessage
 == eMouseDown || aEvent->mMessage == ePointerDown || aEvent
->mMessage == eTouchEnd)>::isValid, "invalid assertion condition"
); if ((__builtin_expect(!!(!(!!(aEvent->mMessage == eKeyDown
 || aEvent->mMessage == eMouseDown || aEvent->mMessage ==
 ePointerDown || aEvent->mMessage == eTouchEnd))), 0))) { do
 { } while (false); MOZ_ReportAssertionFailure("aEvent->mMessage == eKeyDown || aEvent->mMessage == eMouseDown || aEvent->mMessage == ePointerDown || aEvent->mMessage == eTouchEnd"
, "/var/lib/jenkins/workspace/firefox-scan-build/dom/events/EventStateManager.cpp"
, 1438); AnnotateMozCrashReason("MOZ_ASSERT" "(" "aEvent->mMessage == eKeyDown || aEvent->mMessage == eMouseDown || aEvent->mMessage == ePointerDown || aEvent->mMessage == eTouchEnd"
 ")"); do { *((volatile int*)__null) = 1438; __attribute__((nomerge
)) ::abort(); } while (false); } } while (false)
1437               aEvent->mMessage == ePointerDown ||do { static_assert( mozilla::detail::AssertionConditionType<
decltype(aEvent->mMessage == eKeyDown || aEvent->mMessage
 == eMouseDown || aEvent->mMessage == ePointerDown || aEvent
->mMessage == eTouchEnd)>::isValid, "invalid assertion condition"
); if ((__builtin_expect(!!(!(!!(aEvent->mMessage == eKeyDown
 || aEvent->mMessage == eMouseDown || aEvent->mMessage ==
 ePointerDown || aEvent->mMessage == eTouchEnd))), 0))) { do
 { } while (false); MOZ_ReportAssertionFailure("aEvent->mMessage == eKeyDown || aEvent->mMessage == eMouseDown || aEvent->mMessage == ePointerDown || aEvent->mMessage == eTouchEnd"
, "/var/lib/jenkins/workspace/firefox-scan-build/dom/events/EventStateManager.cpp"
, 1438); AnnotateMozCrashReason("MOZ_ASSERT" "(" "aEvent->mMessage == eKeyDown || aEvent->mMessage == eMouseDown || aEvent->mMessage == ePointerDown || aEvent->mMessage == eTouchEnd"
 ")"); do { *((volatile int*)__null) = 1438; __attribute__((nomerge
)) ::abort(); } while (false); } } while (false)
1438               aEvent->mMessage == eTouchEnd)do { static_assert( mozilla::detail::AssertionConditionType<
decltype(aEvent->mMessage == eKeyDown || aEvent->mMessage
 == eMouseDown || aEvent->mMessage == ePointerDown || aEvent
->mMessage == eTouchEnd)>::isValid, "invalid assertion condition"
); if ((__builtin_expect(!!(!(!!(aEvent->mMessage == eKeyDown
 || aEvent->mMessage == eMouseDown || aEvent->mMessage ==
 ePointerDown || aEvent->mMessage == eTouchEnd))), 0))) { do
 { } while (false); MOZ_ReportAssertionFailure("aEvent->mMessage == eKeyDown || aEvent->mMessage == eMouseDown || aEvent->mMessage == ePointerDown || aEvent->mMessage == eTouchEnd"
, "/var/lib/jenkins/workspace/firefox-scan-build/dom/events/EventStateManager.cpp"
, 1438); AnnotateMozCrashReason("MOZ_ASSERT" "(" "aEvent->mMessage == eKeyDown || aEvent->mMessage == eMouseDown || aEvent->mMessage == ePointerDown || aEvent->mMessage == eTouchEnd"
 ")"); do { *((volatile int*)__null) = 1438; __attribute__((nomerge
)) ::abort(); } while (false); } } while (false);
1439  }
1440#endif
1441 
1442  UserActivation::Modifiers modifiers;
1443  if (WidgetInputEvent* inputEvent = aEvent->AsInputEvent()) {
1444    if (CanReflectModifiersToUserActivation(inputEvent)) {
1445      if (inputEvent->IsShift()) {
1446        modifiers.SetShift();
1447      }
1448      if (inputEvent->IsMeta()) {
1449        modifiers.SetMeta();
1450      }
1451      if (inputEvent->IsControl()) {
1452        modifiers.SetControl();
1453      }
1454      if (inputEvent->IsAlt()) {
1455        modifiers.SetAlt();
1456      }
1457 
1458      WidgetMouseEvent* mouseEvent = inputEvent->AsMouseEvent();
1459      if (mouseEvent) {
1460        if (mouseEvent->mButton == MouseButton::eMiddle) {
1461          modifiers.SetMiddleMouse();
1462        }
1463      }
1464    }
1465  }
1466  doc->NotifyUserGestureActivation(modifiers);
1467}
1468 
1469// https://html.spec.whatwg.org/multipage/popover.html#popover-light-dismiss
1470void EventStateManager::LightDismissOpenPopovers(WidgetEvent* aEvent,
1471                                                 nsIContent* aTargetContent) {
1472  MOZ_ASSERT(aEvent->mMessage == ePointerDown || aEvent->mMessage == ePointerUp,do { static_assert( mozilla::detail::AssertionConditionType<
decltype(aEvent->mMessage == ePointerDown || aEvent->mMessage
 == ePointerUp)>::isValid, "invalid assertion condition");
 if ((__builtin_expect(!!(!(!!(aEvent->mMessage == ePointerDown
 || aEvent->mMessage == ePointerUp))), 0))) { do { } while
 (false); MOZ_ReportAssertionFailure("aEvent->mMessage == ePointerDown || aEvent->mMessage == ePointerUp"
 " (" "Light dismiss must be called for pointer up/down only"
 ")", "/var/lib/jenkins/workspace/firefox-scan-build/dom/events/EventStateManager.cpp"
, 1473); AnnotateMozCrashReason("MOZ_ASSERT" "(" "aEvent->mMessage == ePointerDown || aEvent->mMessage == ePointerUp"
 ") (" "Light dismiss must be called for pointer up/down only"
 ")"); do { *((volatile int*)__null) = 1473; __attribute__((nomerge
)) ::abort(); } while (false); } } while (false)
1473             "Light dismiss must be called for pointer up/down only")do { static_assert( mozilla::detail::AssertionConditionType<
decltype(aEvent->mMessage == ePointerDown || aEvent->mMessage
 == ePointerUp)>::isValid, "invalid assertion condition");
 if ((__builtin_expect(!!(!(!!(aEvent->mMessage == ePointerDown
 || aEvent->mMessage == ePointerUp))), 0))) { do { } while
 (false); MOZ_ReportAssertionFailure("aEvent->mMessage == ePointerDown || aEvent->mMessage == ePointerUp"
 " (" "Light dismiss must be called for pointer up/down only"
 ")", "/var/lib/jenkins/workspace/firefox-scan-build/dom/events/EventStateManager.cpp"
, 1473); AnnotateMozCrashReason("MOZ_ASSERT" "(" "aEvent->mMessage == ePointerDown || aEvent->mMessage == ePointerUp"
 ") (" "Light dismiss must be called for pointer up/down only"
 ")"); do { *((volatile int*)__null) = 1473; __attribute__((nomerge
)) ::abort(); } while (false); } } while (false);
1474 
1475  if (!StaticPrefs::dom_element_popover_enabled() || !aEvent->IsTrusted() ||
1476      !aTargetContent) {
1477    return;
1478  }
1479 
1480  Element* topmostPopover = aTargetContent->OwnerDoc()->GetTopmostAutoPopover();
1481  if (!topmostPopover) {
1482    return;
1483  }
1484 
1485  // Pointerdown: set document's popover pointerdown target to the result of
1486  // running topmost clicked popover given target.
1487  if (aEvent->mMessage == ePointerDown) {
1488    mPopoverPointerDownTarget = aTargetContent->GetTopmostClickedPopover();
1489    return;
1490  }
1491 
1492  // Pointerup: hide open popovers.
1493  RefPtr<nsINode> ancestor = aTargetContent->GetTopmostClickedPopover();
1494  bool sameTarget = mPopoverPointerDownTarget == ancestor;
1495  mPopoverPointerDownTarget = nullptr;
1496  if (!sameTarget) {
1497    return;
1498  }
1499 
1500  if (!ancestor) {
1501    ancestor = aTargetContent->OwnerDoc();
1502  }
1503  RefPtr<Document> doc(ancestor->OwnerDoc());
1504  doc->HideAllPopoversUntil(*ancestor, false, true);
1505}
1506 
1507already_AddRefed<EventStateManager> EventStateManager::ESMFromContentOrThis(
1508    nsIContent* aContent) {
1509  if (aContent) {
1510    PresShell* presShell = aContent->OwnerDoc()->GetPresShell();
1511    if (presShell) {
1512      nsPresContext* prescontext = presShell->GetPresContext();
1513      if (prescontext) {
1514        RefPtr<EventStateManager> esm = prescontext->EventStateManager();
1515        if (esm) {
1516          return esm.forget();
1517        }
1518      }
1519    }
1520  }
1521 
1522  RefPtr<EventStateManager> esm = this;
1523  return esm.forget();
1524}
1525 
1526EventStateManager::LastMouseDownInfo& EventStateManager::GetLastMouseDownInfo(
1527    int16_t aButton) {
1528  switch (aButton) {
1529    case MouseButton::ePrimary:
1530      return mLastLeftMouseDownInfo;
1531    case MouseButton::eMiddle:
1532      return mLastMiddleMouseDownInfo;
1533    case MouseButton::eSecondary:
1534      return mLastRightMouseDownInfo;
1535    default:
1536      MOZ_ASSERT_UNREACHABLE("This button shouldn't use this method")do { static_assert( mozilla::detail::AssertionConditionType<
decltype(false)>::isValid, "invalid assertion condition");
 if ((__builtin_expect(!!(!(!!(false))), 0))) { do { } while (
false); MOZ_ReportAssertionFailure("false" " (" "MOZ_ASSERT_UNREACHABLE: "
 "This button shouldn't use this method" ")", "/var/lib/jenkins/workspace/firefox-scan-build/dom/events/EventStateManager.cpp"
, 1536); AnnotateMozCrashReason("MOZ_ASSERT" "(" "false" ") ("
 "MOZ_ASSERT_UNREACHABLE: " "This button shouldn't use this method"
 ")"); do { *((volatile int*)__null) = 1536; __attribute__((nomerge
)) ::abort(); } while (false); } } while (false);
1537      return mLastLeftMouseDownInfo;
1538  }
1539}
1540 
1541void EventStateManager::HandleQueryContentEvent(
1542    WidgetQueryContentEvent* aEvent) {
1543  switch (aEvent->mMessage) {
1544    case eQuerySelectedText:
1545    case eQueryTextContent:
1546    case eQueryCaretRect:
1547    case eQueryTextRect:
1548    case eQueryEditorRect:
1549      if (!IsTargetCrossProcess(aEvent)) {
1550        break;
1551      }
1552      // Will not be handled locally, remote the event
1553      GetCrossProcessTarget()->HandleQueryContentEvent(*aEvent);
1554      return;
1555    // Following events have not been supported in e10s mode yet.
1556    case eQueryContentState:
1557    case eQuerySelectionAsTransferable:
1558    case eQueryCharacterAtPoint:
1559    case eQueryDOMWidgetHittest:
1560    case eQueryTextRectArray:
1561    case eQueryDropTargetHittest:
1562      break;
1563    default:
1564      return;
1565  }
1566 
1567  // If there is an IMEContentObserver, we need to handle QueryContentEvent
1568  // with it.
1569  // eQueryDropTargetHittest is not really an IME event, though
1570  if (mIMEContentObserver && aEvent->mMessage != eQueryDropTargetHittest) {
1571    RefPtr<IMEContentObserver> contentObserver = mIMEContentObserver;
1572    contentObserver->HandleQueryContentEvent(aEvent);
1573    return;
1574  }
1575 
1576  ContentEventHandler handler(mPresContext);
1577  handler.HandleQueryContentEvent(aEvent);
1578}
1579 
1580static AccessKeyType GetAccessKeyTypeFor(nsISupports* aDocShell) {
1581  nsCOMPtr<nsIDocShellTreeItem> treeItem(do_QueryInterface(aDocShell));
1582  if (!treeItem) {
1583    return AccessKeyType::eNone;
1584  }
1585 
1586  switch (treeItem->ItemType()) {
1587    case nsIDocShellTreeItem::typeChrome:
1588      return AccessKeyType::eChrome;
1589    case nsIDocShellTreeItem::typeContent:
1590      return AccessKeyType::eContent;
1591    default:
1592      return AccessKeyType::eNone;
1593  }
1594}
1595 
1596static bool IsAccessKeyTarget(Element* aElement, nsAString& aKey) {
1597  // Use GetAttr because we want Unicode case=insensitive matching
1598  // XXXbz shouldn't this be case-sensitive, per spec?
1599  nsString contentKey;
1600  if (!aElement || !aElement->GetAttr(nsGkAtoms::accesskey, contentKey) ||
1601      !contentKey.Equals(aKey, nsCaseInsensitiveStringComparator)) {
1602    return false;
1603  }
1604 
1605  if (!aElement->IsXULElement()) {
1606    return true;
1607  }
1608 
1609  // For XUL we do visibility checks.
1610  nsIFrame* frame = aElement->GetPrimaryFrame();
1611  if (!frame) {
1612    return false;
1613  }
1614 
1615  if (frame->IsFocusable()) {
1616    return true;
1617  }
1618 
1619  if (!frame->IsVisibleConsideringAncestors()) {
1620    return false;
1621  }
1622 
1623  // XUL controls can be activated.
1624  nsCOMPtr<nsIDOMXULControlElement> control = aElement->AsXULControl();
1625  if (control) {
1626    return true;
1627  }
1628 
1629  // XUL label elements are never focusable, so we need to check for them
1630  // explicitly before giving up.
1631  if (aElement->IsXULElement(nsGkAtoms::label)) {
1632    return true;
1633  }
1634 
1635  return false;
1636}
1637 
1638bool EventStateManager::CheckIfEventMatchesAccessKey(
1639    WidgetKeyboardEvent* aEvent, nsPresContext* aPresContext) {
1640  AutoTArray<uint32_t, 10> accessCharCodes;
1641  aEvent->GetAccessKeyCandidates(accessCharCodes);
1642  return WalkESMTreeToHandleAccessKey(aEvent, aPresContext, accessCharCodes,
1643                                      nullptr, eAccessKeyProcessingNormal,
1644                                      false);
1645}
1646 
1647bool EventStateManager::LookForAccessKeyAndExecute(
1648    nsTArray<uint32_t>& aAccessCharCodes, bool aIsTrustedEvent, bool aIsRepeat,
1649    bool aExecute) {
1650  int32_t count, start = -1;
1651  if (Element* focusedElement = GetFocusedElement()) {
1652    start = mAccessKeys.IndexOf(focusedElement);
1653    if (start == -1 && focusedElement->IsInNativeAnonymousSubtree()) {
1654      start = mAccessKeys.IndexOf(Element::FromNodeOrNull(
1655          focusedElement->GetClosestNativeAnonymousSubtreeRootParentOrHost()));
1656    }
1657  }
1658  RefPtr<Element> element;
1659  int32_t length = mAccessKeys.Count();
1660  for (uint32_t i = 0; i < aAccessCharCodes.Length(); ++i) {
1661    uint32_t ch = aAccessCharCodes[i];
1662    nsAutoString accessKey;
1663    AppendUCS4ToUTF16(ch, accessKey);
1664    for (count = 1; count <= length; ++count) {
1665      // mAccessKeys always stores Element instances.
1666      MOZ_DIAGNOSTIC_ASSERT(length == mAccessKeys.Count())do { static_assert( mozilla::detail::AssertionConditionType<
decltype(length == mAccessKeys.Count())>::isValid, "invalid assertion condition"
); if ((__builtin_expect(!!(!(!!(length == mAccessKeys.Count(
)))), 0))) { do { } while (false); MOZ_ReportAssertionFailure
("length == mAccessKeys.Count()", "/var/lib/jenkins/workspace/firefox-scan-build/dom/events/EventStateManager.cpp"
, 1666); AnnotateMozCrashReason("MOZ_DIAGNOSTIC_ASSERT" "(" "length == mAccessKeys.Count()"
 ")"); do { *((volatile int*)__null) = 1666; __attribute__((nomerge
)) ::abort(); } while (false); } } while (false);
1667      element = mAccessKeys[(start + count) % length];
1668      if (IsAccessKeyTarget(element, accessKey)) {
1669        if (!aExecute) {
1670          return true;
1671        }
1672        Document* doc = element->OwnerDoc();
1673        const bool shouldActivate = [&] {
1674          if (!StaticPrefs::accessibility_accesskeycausesactivation()) {
1675            return false;
1676          }
1677          if (aIsRepeat && nsContentUtils::IsChromeDoc(doc)) {
1678            return false;
1679          }
1680 
1681          // XXXedgar, Bug 1700646, maybe we could use other data structure to
1682          // make searching target with same accesskey easier, and current setup
1683          // could not ensure we cycle the target with tree order.
1684          int32_t j = 0;
1685          while (++j < length) {
1686            Element* el = mAccessKeys[(start + count + j) % length];
1687            if (IsAccessKeyTarget(el, accessKey)) {
1688              return false;
1689            }
1690          }
1691          return true;
1692        }();
1693 
1694        // TODO(bug 1641171): This shouldn't be needed if we considered the
1695        // accesskey combination properly.
1696        if (aIsTrustedEvent) {
1697          doc->NotifyUserGestureActivation();
1698        }
1699 
1700        auto result =
1701            element->PerformAccesskey(shouldActivate, aIsTrustedEvent);
1702        if (result.isOk()) {
1703          if (result.unwrap() && aIsTrustedEvent) {
1704            // If this is a child process, inform the parent that we want the
1705            // focus, but pass false since we don't want to change the window
1706            // order.
1707            nsIDocShell* docShell = mPresContext->GetDocShell();
1708            nsCOMPtr<nsIBrowserChild> child =
1709                docShell ? docShell->GetBrowserChild() : nullptr;
1710            if (child) {
1711              child->SendRequestFocus(false, CallerType::System);
1712            }
1713          }
1714          return true;
1715        }
1716      }
1717    }
1718  }
1719  return false;
1720}
1721 
1722// static
1723void EventStateManager::GetAccessKeyLabelPrefix(Element* aElement,
1724                                                nsAString& aPrefix) {
1725  aPrefix.Truncate();
1726  nsAutoString separator, modifierText;
1727  nsContentUtils::GetModifierSeparatorText(separator);
1728 
1729  AccessKeyType accessKeyType =
1730      GetAccessKeyTypeFor(aElement->OwnerDoc()->GetDocShell());
1731  if (accessKeyType == AccessKeyType::eNone) {
1732    return;
1733  }
1734  Modifiers modifiers = WidgetKeyboardEvent::AccessKeyModifiers(accessKeyType);
1735  if (modifiers == MODIFIER_NONE) {
1736    return;
1737  }
1738 
1739  if (modifiers & MODIFIER_CONTROL) {
1740    nsContentUtils::GetControlText(modifierText);
1741    aPrefix.Append(modifierText + separator);
1742  }
1743  if (modifiers & MODIFIER_META) {
1744    nsContentUtils::GetCommandOrWinText(modifierText);
1745    aPrefix.Append(modifierText + separator);
1746  }
1747  if (modifiers & MODIFIER_ALT) {
1748    nsContentUtils::GetAltText(modifierText);
1749    aPrefix.Append(modifierText + separator);
1750  }
1751  if (modifiers & MODIFIER_SHIFT) {
1752    nsContentUtils::GetShiftText(modifierText);
1753    aPrefix.Append(modifierText + separator);
1754  }
1755}
1756 
1757struct MOZ_STACK_CLASS AccessKeyInfo {
1758  WidgetKeyboardEvent* event;
1759  nsTArray<uint32_t>& charCodes;
1760 
1761  AccessKeyInfo(WidgetKeyboardEvent* aEvent, nsTArray<uint32_t>& aCharCodes)
1762      : event(aEvent), charCodes(aCharCodes) {}
1763};
1764 
1765bool EventStateManager::WalkESMTreeToHandleAccessKey(
1766    WidgetKeyboardEvent* aEvent, nsPresContext* aPresContext,
1767    nsTArray<uint32_t>& aAccessCharCodes, nsIDocShellTreeItem* aBubbledFrom,
1768    ProcessingAccessKeyState aAccessKeyState, bool aExecute) {
1769  EnsureDocument(mPresContext);
1770  nsCOMPtr<nsIDocShell> docShell = aPresContext->GetDocShell();
1771  if (NS_WARN_IF(!docShell)NS_warn_if_impl(!docShell, "!docShell", "/var/lib/jenkins/workspace/firefox-scan-build/dom/events/EventStateManager.cpp"
, 1771) || NS_WARN_IF(!mDocument)NS_warn_if_impl(!mDocument, "!mDocument", "/var/lib/jenkins/workspace/firefox-scan-build/dom/events/EventStateManager.cpp"
, 1771)) {
1772    return false;
1773  }
1774  AccessKeyType accessKeyType = GetAccessKeyTypeFor(docShell);
1775  if (accessKeyType == AccessKeyType::eNone) {
1776    return false;
1777  }
1778  // Alt or other accesskey modifier is down, we may need to do an accesskey.
1779  if (mAccessKeys.Count() > 0 &&
1780      aEvent->ModifiersMatchWithAccessKey(accessKeyType)) {
1781    // Someone registered an accesskey.  Find and activate it.
1782    if (LookForAccessKeyAndExecute(aAccessCharCodes, aEvent->IsTrusted(),
1783                                   aEvent->mIsRepeat, aExecute)) {
1784      return true;
1785    }
1786  }
1787 
1788  int32_t childCount;
1789  docShell->GetInProcessChildCount(&childCount);
1790  for (int32_t counter = 0; counter < childCount; counter++) {
1791    // Not processing the child which bubbles up the handling
1792    nsCOMPtr<nsIDocShellTreeItem> subShellItem;
1793    docShell->GetInProcessChildAt(counter, getter_AddRefs(subShellItem));
1794    if (aAccessKeyState == eAccessKeyProcessingUp &&
1795        subShellItem == aBubbledFrom) {
1796      continue;
1797    }
1798 
1799    nsCOMPtr<nsIDocShell> subDS = do_QueryInterface(subShellItem);
1800    if (subDS && IsShellVisible(subDS)) {
1801      // Guarantee subPresShell lifetime while we're handling access key
1802      // since somebody may assume that it won't be deleted before the
1803      // corresponding nsPresContext and EventStateManager.
1804      RefPtr<PresShell> subPresShell = subDS->GetPresShell();
1805 
1806      // Docshells need not have a presshell (eg. display:none
1807      // iframes, docshells in transition between documents, etc).
1808      if (!subPresShell) {
1809        // Oh, well.  Just move on to the next child
1810        continue;
1811      }
1812 
1813      RefPtr<nsPresContext> subPresContext = subPresShell->GetPresContext();
1814 
1815      RefPtr<EventStateManager> esm =
1816          static_cast<EventStateManager*>(subPresContext->EventStateManager());
1817 
1818      if (esm && esm->WalkESMTreeToHandleAccessKey(
1819                     aEvent, subPresContext, aAccessCharCodes, nullptr,
1820                     eAccessKeyProcessingDown, aExecute)) {
1821        return true;
1822      }
1823    }
1824  }  // if end . checking all sub docshell ends here.
1825 
1826  // bubble up the process to the parent docshell if necessary
1827  if (eAccessKeyProcessingDown != aAccessKeyState) {
1828    nsCOMPtr<nsIDocShellTreeItem> parentShellItem;
1829    docShell->GetInProcessParent(getter_AddRefs(parentShellItem));
1830    nsCOMPtr<nsIDocShell> parentDS = do_QueryInterface(parentShellItem);
1831    if (parentDS) {
1832      // Guarantee parentPresShell lifetime while we're handling access key
1833      // since somebody may assume that it won't be deleted before the
1834      // corresponding nsPresContext and EventStateManager.
1835      RefPtr<PresShell> parentPresShell = parentDS->GetPresShell();
1836      NS_ASSERTION(parentPresShell,do { if (!(parentPresShell)) { NS_DebugBreak(NS_DEBUG_ASSERTION
, "Our PresShell exists but the parent's does not?", "parentPresShell"
, "/var/lib/jenkins/workspace/firefox-scan-build/dom/events/EventStateManager.cpp"
, 1837); MOZ_PretendNoReturn(); } } while (0)
1837                   "Our PresShell exists but the parent's does not?")do { if (!(parentPresShell)) { NS_DebugBreak(NS_DEBUG_ASSERTION
, "Our PresShell exists but the parent's does not?", "parentPresShell"
, "/var/lib/jenkins/workspace/firefox-scan-build/dom/events/EventStateManager.cpp"
, 1837); MOZ_PretendNoReturn(); } } while (0);
1838 
1839      RefPtr<nsPresContext> parentPresContext =
1840          parentPresShell->GetPresContext();
1841      NS_ASSERTION(parentPresContext, "PresShell without PresContext")do { if (!(parentPresContext)) { NS_DebugBreak(NS_DEBUG_ASSERTION
, "PresShell without PresContext", "parentPresContext", "/var/lib/jenkins/workspace/firefox-scan-build/dom/events/EventStateManager.cpp"
, 1841); MOZ_PretendNoReturn(); } } while (0);
1842 
1843      RefPtr<EventStateManager> esm = static_cast<EventStateManager*>(
1844          parentPresContext->EventStateManager());
1845      if (esm && esm->WalkESMTreeToHandleAccessKey(
1846                     aEvent, parentPresContext, aAccessCharCodes, docShell,
1847                     eAccessKeyProcessingDown, aExecute)) {
1848        return true;
1849      }
1850    }
1851  }  // if end. bubble up process
1852 
1853  // If the content access key modifier is pressed, try remote children
1854  if (aExecute &&
1855      aEvent->ModifiersMatchWithAccessKey(AccessKeyType::eContent) &&
1856      mDocument && mDocument->GetWindow()) {
1857    // If the focus is currently on a node with a BrowserParent, the key event
1858    // should've gotten forwarded to the child process and HandleAccessKey
1859    // called from there.
1860    if (BrowserParent::GetFrom(GetFocusedElement())) {
1861      // If access key may be only in remote contents, this method won't handle
1862      // access key synchronously.  In this case, only reply event should reach
1863      // here.
1864      MOZ_ASSERT(aEvent->IsHandledInRemoteProcess() ||do { static_assert( mozilla::detail::AssertionConditionType<
decltype(aEvent->IsHandledInRemoteProcess() || !aEvent->
IsWaitingReplyFromRemoteProcess())>::isValid, "invalid assertion condition"
); if ((__builtin_expect(!!(!(!!(aEvent->IsHandledInRemoteProcess
() || !aEvent->IsWaitingReplyFromRemoteProcess()))), 0))) {
 do { } while (false); MOZ_ReportAssertionFailure("aEvent->IsHandledInRemoteProcess() || !aEvent->IsWaitingReplyFromRemoteProcess()"
, "/var/lib/jenkins/workspace/firefox-scan-build/dom/events/EventStateManager.cpp"
, 1865); AnnotateMozCrashReason("MOZ_ASSERT" "(" "aEvent->IsHandledInRemoteProcess() || !aEvent->IsWaitingReplyFromRemoteProcess()"
 ")"); do { *((volatile int*)__null) = 1865; __attribute__((nomerge
)) ::abort(); } while (false); } } while (false)
1865                 !aEvent->IsWaitingReplyFromRemoteProcess())do { static_assert( mozilla::detail::AssertionConditionType<
decltype(aEvent->IsHandledInRemoteProcess() || !aEvent->
IsWaitingReplyFromRemoteProcess())>::isValid, "invalid assertion condition"
); if ((__builtin_expect(!!(!(!!(aEvent->IsHandledInRemoteProcess
() || !aEvent->IsWaitingReplyFromRemoteProcess()))), 0))) {
 do { } while (false); MOZ_ReportAssertionFailure("aEvent->IsHandledInRemoteProcess() || !aEvent->IsWaitingReplyFromRemoteProcess()"
, "/var/lib/jenkins/workspace/firefox-scan-build/dom/events/EventStateManager.cpp"
, 1865); AnnotateMozCrashReason("MOZ_ASSERT" "(" "aEvent->IsHandledInRemoteProcess() || !aEvent->IsWaitingReplyFromRemoteProcess()"
 ")"); do { *((volatile int*)__null) = 1865; __attribute__((nomerge
)) ::abort(); } while (false); } } while (false);
1866    }
1867    // If focus is somewhere else, then we need to check the remote children.
1868    // However, if the event has already been handled in a remote process,
1869    // then, focus is moved from the remote process after posting the event.
1870    // In such case, we shouldn't retry to handle access keys in remote
1871    // processes.
1872    else if (!aEvent->IsHandledInRemoteProcess()) {
1873      AccessKeyInfo accessKeyInfo(aEvent, aAccessCharCodes);
1874      nsContentUtils::CallOnAllRemoteChildren(
1875          mDocument->GetWindow(),
1876          [&accessKeyInfo](BrowserParent* aBrowserParent) -> CallState {
1877            // Only forward accesskeys for the active tab.
1878            if (aBrowserParent->GetDocShellIsActive()) {
1879              // Even if there is no target for the accesskey in this process,
1880              // the event may match with a content accesskey.  If so, the
1881              // keyboard event should be handled with reply event for
1882              // preventing double action. (e.g., Alt+Shift+F on Windows may
1883              // focus a content in remote and open "File" menu.)
1884              accessKeyInfo.event->StopPropagation();
1885              accessKeyInfo.event->MarkAsWaitingReplyFromRemoteProcess();
1886              aBrowserParent->HandleAccessKey(*accessKeyInfo.event,
1887                                              accessKeyInfo.charCodes);
1888              return CallState::Stop;
1889            }
1890 
1891            return CallState::Continue;
1892          });
1893    }
1894  }
1895 
1896  return false;
1897}  // end of HandleAccessKey
1898 
1899static BrowserParent* GetBrowserParentAncestor(BrowserParent* aBrowserParent) {
1900  MOZ_ASSERT(aBrowserParent)do { static_assert( mozilla::detail::AssertionConditionType<
decltype(aBrowserParent)>::isValid, "invalid assertion condition"
); if ((__builtin_expect(!!(!(!!(aBrowserParent))), 0))) { do
 { } while (false); MOZ_ReportAssertionFailure("aBrowserParent"
, "/var/lib/jenkins/workspace/firefox-scan-build/dom/events/EventStateManager.cpp"
, 1900); AnnotateMozCrashReason("MOZ_ASSERT" "(" "aBrowserParent"
 ")"); do { *((volatile int*)__null) = 1900; __attribute__((nomerge
)) ::abort(); } while (false); } } while (false);
1901 
1902  BrowserBridgeParent* bbp = aBrowserParent->GetBrowserBridgeParent();
1903  if (!bbp) {
1904    return nullptr;
1905  }
1906 
1907  return bbp->Manager();
1908}
1909 
1910static void DispatchCrossProcessMouseExitEvents(WidgetMouseEvent* aMouseEvent,
1911                                                BrowserParent* aRemoteTarget,
1912                                                BrowserParent* aStopAncestor,
1913                                                bool aIsReallyExit) {
1914  MOZ_ASSERT(aMouseEvent)do { static_assert( mozilla::detail::AssertionConditionType<
decltype(aMouseEvent)>::isValid, "invalid assertion condition"
); if ((__builtin_expect(!!(!(!!(aMouseEvent))), 0))) { do { }
 while (false); MOZ_ReportAssertionFailure("aMouseEvent", "/var/lib/jenkins/workspace/firefox-scan-build/dom/events/EventStateManager.cpp"
, 1914); AnnotateMozCrashReason("MOZ_ASSERT" "(" "aMouseEvent"
 ")"); do { *((volatile int*)__null) = 1914; __attribute__((nomerge
)) ::abort(); } while (false); } } while (false);
1915  MOZ_ASSERT(aRemoteTarget)do { static_assert( mozilla::detail::AssertionConditionType<
decltype(aRemoteTarget)>::isValid, "invalid assertion condition"
); if ((__builtin_expect(!!(!(!!(aRemoteTarget))), 0))) { do {
 } while (false); MOZ_ReportAssertionFailure("aRemoteTarget",
 "/var/lib/jenkins/workspace/firefox-scan-build/dom/events/EventStateManager.cpp"
, 1915); AnnotateMozCrashReason("MOZ_ASSERT" "(" "aRemoteTarget"
 ")"); do { *((volatile int*)__null) = 1915; __attribute__((nomerge
)) ::abort(); } while (false); } } while (false);
1916  MOZ_ASSERT(aRemoteTarget != aStopAncestor)do { static_assert( mozilla::detail::AssertionConditionType<
decltype(aRemoteTarget != aStopAncestor)>::isValid, "invalid assertion condition"
); if ((__builtin_expect(!!(!(!!(aRemoteTarget != aStopAncestor
))), 0))) { do { } while (false); MOZ_ReportAssertionFailure(
"aRemoteTarget != aStopAncestor", "/var/lib/jenkins/workspace/firefox-scan-build/dom/events/EventStateManager.cpp"
, 1916); AnnotateMozCrashReason("MOZ_ASSERT" "(" "aRemoteTarget != aStopAncestor"
 ")"); do { *((volatile int*)__null) = 1916; __attribute__((nomerge
)) ::abort(); } while (false); } } while (false);
1917  MOZ_ASSERT_IF(aStopAncestor, nsContentUtils::GetCommonBrowserParentAncestor(do { if (aStopAncestor) { do { static_assert( mozilla::detail
::AssertionConditionType<decltype(nsContentUtils::GetCommonBrowserParentAncestor
( aRemoteTarget, aStopAncestor))>::isValid, "invalid assertion condition"
); if ((__builtin_expect(!!(!(!!(nsContentUtils::GetCommonBrowserParentAncestor
( aRemoteTarget, aStopAncestor)))), 0))) { do { } while (false
); MOZ_ReportAssertionFailure("nsContentUtils::GetCommonBrowserParentAncestor( aRemoteTarget, aStopAncestor)"
, "/var/lib/jenkins/workspace/firefox-scan-build/dom/events/EventStateManager.cpp"
, 1918); AnnotateMozCrashReason("MOZ_ASSERT" "(" "nsContentUtils::GetCommonBrowserParentAncestor( aRemoteTarget, aStopAncestor)"
 ")"); do { *((volatile int*)__null) = 1918; __attribute__((nomerge
)) ::abort(); } while (false); } } while (false); } } while (
false)
1918                                   aRemoteTarget, aStopAncestor))do { if (aStopAncestor) { do { static_assert( mozilla::detail
::AssertionConditionType<decltype(nsContentUtils::GetCommonBrowserParentAncestor
( aRemoteTarget, aStopAncestor))>::isValid, "invalid assertion condition"
); if ((__builtin_expect(!!(!(!!(nsContentUtils::GetCommonBrowserParentAncestor
( aRemoteTarget, aStopAncestor)))), 0))) { do { } while (false
); MOZ_ReportAssertionFailure("nsContentUtils::GetCommonBrowserParentAncestor( aRemoteTarget, aStopAncestor)"
, "/var/lib/jenkins/workspace/firefox-scan-build/dom/events/EventStateManager.cpp"
, 1918); AnnotateMozCrashReason("MOZ_ASSERT" "(" "nsContentUtils::GetCommonBrowserParentAncestor( aRemoteTarget, aStopAncestor)"
 ")"); do { *((volatile int*)__null) = 1918; __attribute__((nomerge
)) ::abort(); } while (false); } } while (false); } } while (
false);
1919 
1920  while (aRemoteTarget != aStopAncestor) {
1921    UniquePtr<WidgetMouseEvent> mouseExitEvent =
1922        CreateMouseOrPointerWidgetEvent(aMouseEvent, eMouseExitFromWidget,
1923                                        aMouseEvent->mRelatedTarget);
1924    mouseExitEvent->mExitFrom =
1925        Some(aIsReallyExit ? WidgetMouseEvent::ePuppet
1926                           : WidgetMouseEvent::ePuppetParentToPuppetChild);
1927    aRemoteTarget->SendRealMouseEvent(*mouseExitEvent);
1928 
1929    aRemoteTarget = GetBrowserParentAncestor(aRemoteTarget);
1930  }
1931}
1932 
1933void EventStateManager::DispatchCrossProcessEvent(WidgetEvent* aEvent,
1934                                                  BrowserParent* aRemoteTarget,
1935                                                  nsEventStatus* aStatus) {
1936  MOZ_ASSERT(aEvent)do { static_assert( mozilla::detail::AssertionConditionType<
decltype(aEvent)>::isValid, "invalid assertion condition")
; if ((__builtin_expect(!!(!(!!(aEvent))), 0))) { do { } while
 (false); MOZ_ReportAssertionFailure("aEvent", "/var/lib/jenkins/workspace/firefox-scan-build/dom/events/EventStateManager.cpp"
, 1936); AnnotateMozCrashReason("MOZ_ASSERT" "(" "aEvent" ")"
); do { *((volatile int*)__null) = 1936; __attribute__((nomerge
)) ::abort(); } while (false); } } while (false);
1937  MOZ_ASSERT(aRemoteTarget)do { static_assert( mozilla::detail::AssertionConditionType<
decltype(aRemoteTarget)>::isValid, "invalid assertion condition"
); if ((__builtin_expect(!!(!(!!(aRemoteTarget))), 0))) { do {
 } while (false); MOZ_ReportAssertionFailure("aRemoteTarget",
 "/var/lib/jenkins/workspace/firefox-scan-build/dom/events/EventStateManager.cpp"
, 1937); AnnotateMozCrashReason("MOZ_ASSERT" "(" "aRemoteTarget"
 ")"); do { *((volatile int*)__null) = 1937; __attribute__((nomerge
)) ::abort(); } while (false); } } while (false);
1938  MOZ_ASSERT(aStatus)do { static_assert( mozilla::detail::AssertionConditionType<
decltype(aStatus)>::isValid, "invalid assertion condition"
); if ((__builtin_expect(!!(!(!!(aStatus))), 0))) { do { } while
 (false); MOZ_ReportAssertionFailure("aStatus", "/var/lib/jenkins/workspace/firefox-scan-build/dom/events/EventStateManager.cpp"
, 1938); AnnotateMozCrashReason("MOZ_ASSERT" "(" "aStatus" ")"
); do { *((volatile int*)__null) = 1938; __attribute__((nomerge
)) ::abort(); } while (false); } } while (false);
1939 
1940  BrowserParent* remote = aRemoteTarget;
1941 
1942  WidgetMouseEvent* mouseEvent = aEvent->AsMouseEvent();
1943  bool isContextMenuKey = mouseEvent && mouseEvent->IsContextMenuKeyEvent();
1944  if (aEvent->mClass == eKeyboardEventClass || isContextMenuKey) {
1945    // APZ attaches a LayersId to hit-testable events, for keyboard events,
1946    // we use focus.
1947    BrowserParent* preciseRemote = BrowserParent::GetFocused();
1948    if (preciseRemote) {
1949      remote = preciseRemote;
1950    }
1951    // else there is a race between layout and focus tracking,
1952    // so fall back to delivering the event to the topmost child process.
1953  } else if (aEvent->mLayersId.IsValid()) {
1954    BrowserParent* preciseRemote =
1955        BrowserParent::GetBrowserParentFromLayersId(aEvent->mLayersId);
1956    if (preciseRemote) {
1957      remote = preciseRemote;
1958    }
1959    // else there is a race between APZ and the LayersId to BrowserParent
1960    // mapping, so fall back to delivering the event to the topmost child
1961    // process.
1962  }
1963 
1964  MOZ_ASSERT(aEvent->mMessage != ePointerClick)do { static_assert( mozilla::detail::AssertionConditionType<
decltype(aEvent->mMessage != ePointerClick)>::isValid, "invalid assertion condition"
); if ((__builtin_expect(!!(!(!!(aEvent->mMessage != ePointerClick
))), 0))) { do { } while (false); MOZ_ReportAssertionFailure(
"aEvent->mMessage != ePointerClick", "/var/lib/jenkins/workspace/firefox-scan-build/dom/events/EventStateManager.cpp"
, 1964); AnnotateMozCrashReason("MOZ_ASSERT" "(" "aEvent->mMessage != ePointerClick"
 ")"); do { *((volatile int*)__null) = 1964; __attribute__((nomerge
)) ::abort(); } while (false); } } while (false);
1965  MOZ_ASSERT(aEvent->mMessage != ePointerAuxClick)do { static_assert( mozilla::detail::AssertionConditionType<
decltype(aEvent->mMessage != ePointerAuxClick)>::isValid
, "invalid assertion condition"); if ((__builtin_expect(!!(!(
!!(aEvent->mMessage != ePointerAuxClick))), 0))) { do { } while
 (false); MOZ_ReportAssertionFailure("aEvent->mMessage != ePointerAuxClick"
, "/var/lib/jenkins/workspace/firefox-scan-build/dom/events/EventStateManager.cpp"
, 1965); AnnotateMozCrashReason("MOZ_ASSERT" "(" "aEvent->mMessage != ePointerAuxClick"
 ")"); do { *((volatile int*)__null) = 1965; __attribute__((nomerge
)) ::abort(); } while (false); } } while (false);
1966 
1967  // SendReal* will transform the coordinate to the child process coordinate
1968  // space. So restore the coordinate after the event has been dispatched to the
1969  // child process to avoid using the transformed coordinate afterward.
1970  AutoRestore<LayoutDeviceIntPoint> restore(aEvent->mRefPoint);
1971  switch (aEvent->mClass) {
1972    case ePointerEventClass:
1973      MOZ_ASSERT(aEvent->mMessage == eContextMenu)do { static_assert( mozilla::detail::AssertionConditionType<
decltype(aEvent->mMessage == eContextMenu)>::isValid, "invalid assertion condition"
); if ((__builtin_expect(!!(!(!!(aEvent->mMessage == eContextMenu
))), 0))) { do { } while (false); MOZ_ReportAssertionFailure(
"aEvent->mMessage == eContextMenu", "/var/lib/jenkins/workspace/firefox-scan-build/dom/events/EventStateManager.cpp"
, 1973); AnnotateMozCrashReason("MOZ_ASSERT" "(" "aEvent->mMessage == eContextMenu"
 ")"); do { *((volatile int*)__null) = 1973; __attribute__((nomerge
)) ::abort(); } while (false); } } while (false);
1974      [[fallthrough]];
1975    case eMouseEventClass: {
1976      BrowserParent* oldRemote = BrowserParent::GetLastMouseRemoteTarget();
1977 
1978      // If this is a eMouseExitFromWidget event, need to redirect the event to
1979      // the last remote and and notify all its ancestors about the exit, if
1980      // any.
1981      if (mouseEvent->mMessage == eMouseExitFromWidget) {
1982        MOZ_ASSERT(mouseEvent->mExitFrom.value() == WidgetMouseEvent::ePuppet)do { static_assert( mozilla::detail::AssertionConditionType<
decltype(mouseEvent->mExitFrom.value() == WidgetMouseEvent
::ePuppet)>::isValid, "invalid assertion condition"); if (
(__builtin_expect(!!(!(!!(mouseEvent->mExitFrom.value() ==
 WidgetMouseEvent::ePuppet))), 0))) { do { } while (false); MOZ_ReportAssertionFailure
("mouseEvent->mExitFrom.value() == WidgetMouseEvent::ePuppet"
, "/var/lib/jenkins/workspace/firefox-scan-build/dom/events/EventStateManager.cpp"
, 1982); AnnotateMozCrashReason("MOZ_ASSERT" "(" "mouseEvent->mExitFrom.value() == WidgetMouseEvent::ePuppet"
 ")"); do { *((volatile int*)__null) = 1982; __attribute__((nomerge
)) ::abort(); } while (false); } } while (false);
1983        MOZ_ASSERT(mouseEvent->mReason == WidgetMouseEvent::eReal)do { static_assert( mozilla::detail::AssertionConditionType<
decltype(mouseEvent->mReason == WidgetMouseEvent::eReal)>
::isValid, "invalid assertion condition"); if ((__builtin_expect
(!!(!(!!(mouseEvent->mReason == WidgetMouseEvent::eReal)))
, 0))) { do { } while (false); MOZ_ReportAssertionFailure("mouseEvent->mReason == WidgetMouseEvent::eReal"
, "/var/lib/jenkins/workspace/firefox-scan-build/dom/events/EventStateManager.cpp"
, 1983); AnnotateMozCrashReason("MOZ_ASSERT" "(" "mouseEvent->mReason == WidgetMouseEvent::eReal"
 ")"); do { *((volatile int*)__null) = 1983; __attribute__((nomerge
)) ::abort(); } while (false); } } while (false);
1984        MOZ_ASSERT(!mouseEvent->mLayersId.IsValid())do { static_assert( mozilla::detail::AssertionConditionType<
decltype(!mouseEvent->mLayersId.IsValid())>::isValid, "invalid assertion condition"
); if ((__builtin_expect(!!(!(!!(!mouseEvent->mLayersId.IsValid
()))), 0))) { do { } while (false); MOZ_ReportAssertionFailure
("!mouseEvent->mLayersId.IsValid()", "/var/lib/jenkins/workspace/firefox-scan-build/dom/events/EventStateManager.cpp"
, 1984); AnnotateMozCrashReason("MOZ_ASSERT" "(" "!mouseEvent->mLayersId.IsValid()"
 ")"); do { *((volatile int*)__null) = 1984; __attribute__((nomerge
)) ::abort(); } while (false); } } while (false);
1985        MOZ_ASSERT(remote->GetBrowserHost())do { static_assert( mozilla::detail::AssertionConditionType<
decltype(remote->GetBrowserHost())>::isValid, "invalid assertion condition"
); if ((__builtin_expect(!!(!(!!(remote->GetBrowserHost())
)), 0))) { do { } while (false); MOZ_ReportAssertionFailure("remote->GetBrowserHost()"
, "/var/lib/jenkins/workspace/firefox-scan-build/dom/events/EventStateManager.cpp"
, 1985); AnnotateMozCrashReason("MOZ_ASSERT" "(" "remote->GetBrowserHost()"
 ")"); do { *((volatile int*)__null) = 1985; __attribute__((nomerge
)) ::abort(); } while (false); } } while (false);
1986 
1987        if (oldRemote && oldRemote != remote) {
1988          Unused << NS_WARN_IF(nsContentUtils::GetCommonBrowserParentAncestor(NS_warn_if_impl(nsContentUtils::GetCommonBrowserParentAncestor
( remote, oldRemote) != remote, "nsContentUtils::GetCommonBrowserParentAncestor( remote, oldRemote) != remote"
, "/var/lib/jenkins/workspace/firefox-scan-build/dom/events/EventStateManager.cpp"
, 1989)
1989                                   remote, oldRemote) != remote)NS_warn_if_impl(nsContentUtils::GetCommonBrowserParentAncestor
( remote, oldRemote) != remote, "nsContentUtils::GetCommonBrowserParentAncestor( remote, oldRemote) != remote"
, "/var/lib/jenkins/workspace/firefox-scan-build/dom/events/EventStateManager.cpp"
, 1989);
1990          remote = oldRemote;
1991        }
1992 
1993        DispatchCrossProcessMouseExitEvents(mouseEvent, remote, nullptr, true);
1994        return;
1995      }
1996 
1997      if (BrowserParent* pointerLockedRemote =
1998              PointerLockManager::GetLockedRemoteTarget()) {
1999        remote = pointerLockedRemote;
2000      } else if (BrowserParent* pointerCapturedRemote =
2001                     PointerEventHandler::GetPointerCapturingRemoteTarget(
2002                         mouseEvent->pointerId)) {
2003        remote = pointerCapturedRemote;
2004      } else if (BrowserParent* capturingRemote =
2005                     PresShell::GetCapturingRemoteTarget()) {
2006        remote = capturingRemote;
2007      }
2008 
2009      // If a mouse is over a remote target A, and then moves to
2010      // remote target B, we'd deliver the event directly to remote target B
2011      // after the moving, A would never get notified that the mouse left.
2012      // So we generate a exit event to notify A after the move.
2013      // XXXedgar, if the synthesized mouse events could deliver to the correct
2014      // process directly (see
2015      // https://bugzilla.mozilla.org/show_bug.cgi?id=1549355), we probably
2016      // don't need to check mReason then.
2017      if (mouseEvent->mReason == WidgetMouseEvent::eReal &&
2018          remote != oldRemote) {
2019        MOZ_ASSERT(mouseEvent->mMessage != eMouseExitFromWidget)do { static_assert( mozilla::detail::AssertionConditionType<
decltype(mouseEvent->mMessage != eMouseExitFromWidget)>
::isValid, "invalid assertion condition"); if ((__builtin_expect
(!!(!(!!(mouseEvent->mMessage != eMouseExitFromWidget))), 0
))) { do { } while (false); MOZ_ReportAssertionFailure("mouseEvent->mMessage != eMouseExitFromWidget"
, "/var/lib/jenkins/workspace/firefox-scan-build/dom/events/EventStateManager.cpp"
, 2019); AnnotateMozCrashReason("MOZ_ASSERT" "(" "mouseEvent->mMessage != eMouseExitFromWidget"
 ")"); do { *((volatile int*)__null) = 2019; __attribute__((nomerge
)) ::abort(); } while (false); } } while (false);
2020        if (oldRemote) {
2021          BrowserParent* commonAncestor =
2022              nsContentUtils::GetCommonBrowserParentAncestor(remote, oldRemote);
2023          if (commonAncestor == oldRemote) {
2024            // Mouse moves to the inner OOP frame, it is not a really exit.
2025            DispatchCrossProcessMouseExitEvents(
2026                mouseEvent, GetBrowserParentAncestor(remote),
2027                GetBrowserParentAncestor(commonAncestor), false);
2028          } else if (commonAncestor == remote) {
2029            // Mouse moves to the outer OOP frame, it is a really exit.
2030            DispatchCrossProcessMouseExitEvents(mouseEvent, oldRemote,
2031                                                commonAncestor, true);
2032          } else {
2033            // Mouse moves to OOP frame in other subtree, it is a really exit,
2034            // need to notify all its ancestors before common ancestor about the
2035            // exit.
2036            DispatchCrossProcessMouseExitEvents(mouseEvent, oldRemote,
2037                                                commonAncestor, true);
2038            if (commonAncestor) {
2039              UniquePtr<WidgetMouseEvent> mouseExitEvent =
2040                  CreateMouseOrPointerWidgetEvent(mouseEvent,
2041                                                  eMouseExitFromWidget,
2042                                                  mouseEvent->mRelatedTarget);
2043              mouseExitEvent->mExitFrom =
2044                  Some(WidgetMouseEvent::ePuppetParentToPuppetChild);
2045              commonAncestor->SendRealMouseEvent(*mouseExitEvent);
2046            }
2047          }
2048        }
2049 
2050        if (mouseEvent->mMessage != eMouseExitFromWidget &&
2051            mouseEvent->mMessage != eMouseEnterIntoWidget) {
2052          // This is to make cursor would be updated correctly.
2053          remote->MouseEnterIntoWidget();
2054        }
2055      }
2056 
2057      remote->SendRealMouseEvent(*mouseEvent);
2058      return;
2059    }
2060    case eKeyboardEventClass: {
2061      auto* keyboardEvent = aEvent->AsKeyboardEvent();
2062      if (aEvent->mMessage == eKeyUp) {
2063        HandleKeyUpInteraction(keyboardEvent);
2064      }
2065      remote->SendRealKeyEvent(*keyboardEvent);
2066      return;
2067    }
2068    case eWheelEventClass: {
2069      if (BrowserParent* pointerLockedRemote =
2070              PointerLockManager::GetLockedRemoteTarget()) {
2071        remote = pointerLockedRemote;
2072      }
2073      remote->SendMouseWheelEvent(*aEvent->AsWheelEvent());
2074      return;
2075    }
2076    case eTouchEventClass: {
2077      // Let the child process synthesize a mouse event if needed, and
2078      // ensure we don't synthesize one in this process.
2079      *aStatus = nsEventStatus_eConsumeNoDefault;
2080      remote->SendRealTouchEvent(*aEvent->AsTouchEvent());
2081      return;
2082    }
2083    case eDragEventClass: {
2084      RefPtr<BrowserParent> browserParent = remote;
2085      browserParent->MaybeInvokeDragSession(aEvent->mMessage);
2086 
2087      RefPtr<nsIWidget> widget = browserParent->GetTopLevelWidget();
2088      nsCOMPtr<nsIDragSession> dragSession =
2089          nsContentUtils::GetDragSession(widget);
2090      uint32_t dropEffect = nsIDragService::DRAGDROP_ACTION_NONE;
2091      uint32_t action = nsIDragService::DRAGDROP_ACTION_NONE;
2092      nsCOMPtr<nsIPrincipal> principal;
2093      nsCOMPtr<nsIContentSecurityPolicy> csp;
2094 
2095      if (dragSession) {
2096        dragSession->DragEventDispatchedToChildProcess();
2097        dragSession->GetDragAction(&action);
2098        dragSession->GetTriggeringPrincipal(getter_AddRefs(principal));
2099        dragSession->GetCsp(getter_AddRefs(csp));
2100        RefPtr<DataTransfer> initialDataTransfer =
2101            dragSession->GetDataTransfer();
2102        if (initialDataTransfer) {
2103          dropEffect = initialDataTransfer->DropEffectInt();
2104        }
2105      }
2106 
2107      browserParent->SendRealDragEvent(*aEvent->AsDragEvent(), action,
2108                                       dropEffect, principal, csp);
2109      return;
2110    }
2111    default: {
2112      MOZ_CRASH("Attempt to send non-whitelisted event?")do { do { } while (false); MOZ_ReportCrash("" "Attempt to send non-whitelisted event?"
, "/var/lib/jenkins/workspace/firefox-scan-build/dom/events/EventStateManager.cpp"
, 2112); AnnotateMozCrashReason("MOZ_CRASH(" "Attempt to send non-whitelisted event?"
 ")"); do { *((volatile int*)__null) = 2112; __attribute__((nomerge
)) ::abort(); } while (false); } while (false);
2113    }
2114  }
2115}
2116 
2117bool EventStateManager::IsRemoteTarget(nsIContent* target) {
2118  return BrowserParent::GetFrom(target) || BrowserBridgeChild::GetFrom(target);
2119}
2120 
2121bool EventStateManager::IsTopLevelRemoteTarget(nsIContent* target) {
2122  return !!BrowserParent::GetFrom(target);
2123}
2124 
2125bool EventStateManager::HandleCrossProcessEvent(WidgetEvent* aEvent,
2126                                                nsEventStatus* aStatus) {
2127  if (!aEvent->CanBeSentToRemoteProcess()) {
2128    return false;
2129  }
2130 
2131  MOZ_ASSERT(!aEvent->HasBeenPostedToRemoteProcess(),do { static_assert( mozilla::detail::AssertionConditionType<
decltype(!aEvent->HasBeenPostedToRemoteProcess())>::isValid
, "invalid assertion condition"); if ((__builtin_expect(!!(!(
!!(!aEvent->HasBeenPostedToRemoteProcess()))), 0))) { do {
 } while (false); MOZ_ReportAssertionFailure("!aEvent->HasBeenPostedToRemoteProcess()"
 " (" "Why do we need to post same event to remote processes again?"
 ")", "/var/lib/jenkins/workspace/firefox-scan-build/dom/events/EventStateManager.cpp"
, 2132); AnnotateMozCrashReason("MOZ_ASSERT" "(" "!aEvent->HasBeenPostedToRemoteProcess()"
 ") (" "Why do we need to post same event to remote processes again?"
 ")"); do { *((volatile int*)__null) = 2132; __attribute__((nomerge
)) ::abort(); } while (false); } } while (false)
2132             "Why do we need to post same event to remote processes again?")do { static_assert( mozilla::detail::AssertionConditionType<
decltype(!aEvent->HasBeenPostedToRemoteProcess())>::isValid
, "invalid assertion condition"); if ((__builtin_expect(!!(!(
!!(!aEvent->HasBeenPostedToRemoteProcess()))), 0))) { do {
 } while (false); MOZ_ReportAssertionFailure("!aEvent->HasBeenPostedToRemoteProcess()"
 " (" "Why do we need to post same event to remote processes again?"
 ")", "/var/lib/jenkins/workspace/firefox-scan-build/dom/events/EventStateManager.cpp"
, 2132); AnnotateMozCrashReason("MOZ_ASSERT" "(" "!aEvent->HasBeenPostedToRemoteProcess()"
 ") (" "Why do we need to post same event to remote processes again?"
 ")"); do { *((volatile int*)__null) = 2132; __attribute__((nomerge
)) ::abort(); } while (false); } } while (false);
2133 
2134  // Collect the remote event targets we're going to forward this
2135  // event to.
2136  //
2137  // NB: the elements of |remoteTargets| must be unique, for correctness.
2138  AutoTArray<RefPtr<BrowserParent>, 1> remoteTargets;
2139  if (aEvent->mClass != eTouchEventClass || aEvent->mMessage == eTouchStart) {
2140    // If this event only has one target, and it's remote, add it to
2141    // the array.
2142    nsIFrame* frame = aEvent->mMessage == eDragExit
2143                          ? sLastDragOverFrame.GetFrame()
2144                          : GetEventTarget();
2145    nsIContent* target = frame ? frame->GetContent() : nullptr;
2146    if (BrowserParent* remoteTarget = BrowserParent::GetFrom(target)) {
2147      remoteTargets.AppendElement(remoteTarget);
2148    }
2149  } else {
2150    // This is a touch event with possibly multiple touch points.
2151    // Each touch point may have its own target.  So iterate through
2152    // all of them and collect the unique set of targets for event
2153    // forwarding.
2154    //
2155    // This loop is similar to the one used in
2156    // PresShell::DispatchTouchEvent().
2157    const WidgetTouchEvent::TouchArray& touches =
2158        aEvent->AsTouchEvent()->mTouches;
2159    for (uint32_t i = 0; i < touches.Length(); ++i) {
2160      Touch* touch = touches[i];
2161      // NB: the |mChanged| check is an optimization, subprocesses can
2162      // compute this for themselves.  If the touch hasn't changed, we
2163      // may be able to avoid forwarding the event entirely (which is
2164      // not free).
2165      if (!touch || !touch->mChanged) {
2166        continue;
2167      }
2168      nsCOMPtr<EventTarget> targetPtr = touch->mTarget;
2169      if (!targetPtr) {
2170        continue;
2171      }
2172      nsCOMPtr<nsIContent> target = do_QueryInterface(targetPtr);
2173      BrowserParent* remoteTarget = BrowserParent::GetFrom(target);
2174      if (remoteTarget && !remoteTargets.Contains(remoteTarget)) {
2175        remoteTargets.AppendElement(remoteTarget);
2176      }
2177    }
2178  }
2179 
2180  if (remoteTargets.Length() == 0) {
2181    return false;
2182  }
2183 
2184  // Dispatch the event to the remote target.
2185  for (uint32_t i = 0; i < remoteTargets.Length(); ++i) {
2186    DispatchCrossProcessEvent(aEvent, remoteTargets[i], aStatus);
2187  }
2188  return aEvent->HasBeenPostedToRemoteProcess();
2189}
2190 
2191//
2192// CreateClickHoldTimer
2193//
2194// Fire off a timer for determining if the user wants click-hold. This timer
2195// is a one-shot that will be cancelled when the user moves enough to fire
2196// a drag.
2197//
2198void EventStateManager::CreateClickHoldTimer(nsPresContext* inPresContext,
2199                                             nsIFrame* inDownFrame,
2200                                             WidgetGUIEvent* inMouseDownEvent) {
2201  if (!inMouseDownEvent->IsTrusted() ||
2202      IsTopLevelRemoteTarget(mGestureDownContent) ||
2203      PointerLockManager::IsLocked()) {
2204    return;
2205  }
2206 
2207  // just to be anal (er, safe)
2208  if (mClickHoldTimer) {
2209    mClickHoldTimer->Cancel();
2210    mClickHoldTimer = nullptr;
2211  }
2212 
2213  // if content clicked on has a popup, don't even start the timer
2214  // since we'll end up conflicting and both will show.
2215  if (mGestureDownContent &&
2216      nsContentUtils::HasNonEmptyAttr(mGestureDownContent, kNameSpaceID_None,
2217                                      nsGkAtoms::popup)) {
2218    return;
2219  }
2220 
2221  int32_t clickHoldDelay = StaticPrefs::ui_click_hold_context_menus_delay();
2222  NS_NewTimerWithFuncCallback(
2223      getter_AddRefs(mClickHoldTimer), sClickHoldCallback, this, clickHoldDelay,
2224      nsITimer::TYPE_ONE_SHOT, "EventStateManager::CreateClickHoldTimer");
2225}  // CreateClickHoldTimer
2226 
2227//
2228// KillClickHoldTimer
2229//
2230// Stop the timer that would show the context menu dead in its tracks
2231//
2232void EventStateManager::KillClickHoldTimer() {
2233  if (mClickHoldTimer) {
2234    mClickHoldTimer->Cancel();
2235    mClickHoldTimer = nullptr;
2236  }
2237}
2238 
2239//
2240// sClickHoldCallback
2241//
2242// This fires after the mouse has been down for a certain length of time.
2243//
2244void EventStateManager::sClickHoldCallback(nsITimer* aTimer, void* aESM) {
2245  RefPtr<EventStateManager> self = static_cast<EventStateManager*>(aESM);
2246  if (self) {
2247    self->FireContextClick();
2248  }
2249 
2250  // NOTE: |aTimer| and |self->mAutoHideTimer| are invalid after calling
2251  // ClosePopup();
2252 
2253}  // sAutoHideCallback
2254 
2255//
2256// FireContextClick
2257//
2258// If we're this far, our timer has fired, which means the mouse has been down
2259// for a certain period of time and has not moved enough to generate a
2260// dragGesture. We can be certain the user wants a context-click at this stage,
2261// so generate a dom event and fire it in.
2262//
2263// After the event fires, check if PreventDefault() has been set on the event
2264// which means that someone either ate the event or put up a context menu. This
2265// is our cue to stop tracking the drag gesture. If we always did this,
2266// draggable items w/out a context menu wouldn't be draggable after a certain
2267// length of time, which is _not_ what we want.
2268//
2269void EventStateManager::FireContextClick() {
2270  if (!mGestureDownContent || !mPresContext || PointerLockManager::IsLocked()) {
2271    return;
2272  }
2273 
2274#ifdef XP_MACOSX
2275  // Hack to ensure that we don't show a context menu when the user
2276  // let go of the mouse after a long cpu-hogging operation prevented
2277  // us from handling any OS events. See bug 117589.
2278  if (!CGEventSourceButtonState(kCGEventSourceStateCombinedSessionState,
2279                                kCGMouseButtonLeft))
2280    return;
2281#endif
2282 
2283  nsEventStatus status = nsEventStatus_eIgnore;
2284 
2285  // Dispatch to the DOM. We have to fake out the ESM and tell it that the
2286  // current target frame is actually where the mouseDown occurred, otherwise it
2287  // will use the frame the mouse is currently over which may or may not be
2288  // the same. (Note: saari and I have decided that we don't have to reset
2289  // |mCurrentTarget| when we're through because no one else is doing anything
2290  // more with this event and it will get reset on the very next event to the
2291  // correct frame).
2292  mCurrentTarget = mPresContext->GetPrimaryFrameFor(mGestureDownContent);
2293  // make sure the widget sticks around
2294  nsCOMPtr<nsIWidget> targetWidget;
2295  if (mCurrentTarget && (targetWidget = mCurrentTarget->GetNearestWidget())) {
2296    NS_ASSERTION(do { if (!(mPresContext == mCurrentTarget->PresContext()))
 { NS_DebugBreak(NS_DEBUG_ASSERTION, "a prescontext returned a primary frame that didn't belong to it?"
, "mPresContext == mCurrentTarget->PresContext()", "/var/lib/jenkins/workspace/firefox-scan-build/dom/events/EventStateManager.cpp"
, 2298); MOZ_PretendNoReturn(); } } while (0)
2297        mPresContext == mCurrentTarget->PresContext(),do { if (!(mPresContext == mCurrentTarget->PresContext()))
 { NS_DebugBreak(NS_DEBUG_ASSERTION, "a prescontext returned a primary frame that didn't belong to it?"
, "mPresContext == mCurrentTarget->PresContext()", "/var/lib/jenkins/workspace/firefox-scan-build/dom/events/EventStateManager.cpp"
, 2298); MOZ_PretendNoReturn(); } } while (0)
2298        "a prescontext returned a primary frame that didn't belong to it?")do { if (!(mPresContext == mCurrentTarget->PresContext()))
 { NS_DebugBreak(NS_DEBUG_ASSERTION, "a prescontext returned a primary frame that didn't belong to it?"
, "mPresContext == mCurrentTarget->PresContext()", "/var/lib/jenkins/workspace/firefox-scan-build/dom/events/EventStateManager.cpp"
, 2298); MOZ_PretendNoReturn(); } } while (0);
2299 
2300    // before dispatching, check that we're not on something that
2301    // doesn't get a context menu
2302    bool allowedToDispatch = true;
2303 
2304    if (mGestureDownContent->IsAnyOfXULElements(nsGkAtoms::scrollbar,
2305                                                nsGkAtoms::scrollbarbutton,
2306                                                nsGkAtoms::button)) {
2307      allowedToDispatch = false;
2308    } else if (mGestureDownContent->IsXULElement(nsGkAtoms::toolbarbutton)) {
2309      // a <toolbarbutton> that has the container attribute set
2310      // will already have its own dropdown.
2311      if (nsContentUtils::HasNonEmptyAttr(
2312              mGestureDownContent, kNameSpaceID_None, nsGkAtoms::container)) {
2313        allowedToDispatch = false;
2314      } else {
2315        // If the toolbar button has an open menu, don't attempt to open
2316        // a second menu
2317        if (mGestureDownContent->IsElement() &&
2318            mGestureDownContent->AsElement()->AttrValueIs(
2319                kNameSpaceID_None, nsGkAtoms::open, nsGkAtoms::_true,
2320                eCaseMatters)) {
2321          allowedToDispatch = false;
2322        }
2323      }
2324    } else if (mGestureDownContent->IsHTMLElement()) {
2325      if (const auto* formCtrl =
2326              nsIFormControl::FromNode(mGestureDownContent)) {
2327        allowedToDispatch =
2328            formCtrl->IsTextControl(/*aExcludePassword*/ false) ||
2329            formCtrl->ControlType() == FormControlType::InputFile;
2330      } else if (mGestureDownContent->IsAnyOfHTMLElements(
2331                     nsGkAtoms::embed, nsGkAtoms::object, nsGkAtoms::label)) {
2332        allowedToDispatch = false;
2333      }
2334    }
2335 
2336    if (allowedToDispatch) {
2337      // init the event while mCurrentTarget is still good
2338      WidgetPointerEvent event(true, eContextMenu, targetWidget);
2339      event.mClickCount = 1;
2340      FillInEventFromGestureDown(&event);
2341 
2342      // we need to forget the clicking content and click count for the
2343      // following eMouseUp event when click-holding context menus
2344      LastMouseDownInfo& mouseDownInfo = GetLastMouseDownInfo(event.mButton);
2345      mouseDownInfo.mLastMouseDownContent = nullptr;
2346      mouseDownInfo.mClickCount = 0;
2347      mouseDownInfo.mLastMouseDownInputControlType = Nothing();
2348 
2349      // stop selection tracking, we're in control now
2350      if (mCurrentTarget) {
2351        RefPtr<nsFrameSelection> frameSel = mCurrentTarget->GetFrameSelection();
2352 
2353        if (frameSel && frameSel->GetDragState()) {
2354          // note that this can cause selection changed events to fire if we're
2355          // in a text field, which will null out mCurrentTarget
2356          frameSel->SetDragState(false);
2357        }
2358      }
2359 
2360      AutoHandlingUserInputStatePusher userInpStatePusher(true, &event);
2361 
2362      // dispatch to DOM
2363      RefPtr<nsPresContext> presContext = mPresContext;
2364 
2365      // The contextmenu event handled by PresShell will apply to elements (not
2366      // all nodes) correctly and will be dispatched to EventStateManager for
2367      // further handling preventing click event and stopping tracking drag
2368      // gesture.
2369      if (RefPtr<PresShell> presShell = presContext->GetPresShell()) {
2370        presShell->HandleEvent(mCurrentTarget, &event, false, &status);
2371      }
2372 
2373      // We don't need to dispatch to frame handling because no frames
2374      // watch eContextMenu except for nsMenuFrame and that's only for
2375      // dismissal. That's just as well since we don't really know
2376      // which frame to send it to.
2377    }
2378  }
2379 
2380  // stop tracking a drag whatever the event has been handled or not.
2381  StopTrackingDragGesture(true);
2382 
2383  KillClickHoldTimer();
2384 
2385}  // FireContextClick
2386 
2387//
2388// BeginTrackingDragGesture
2389//
2390// Record that the mouse has gone down and that we should move to TRACKING state
2391// of d&d gesture tracker.
2392//
2393// We also use this to track click-hold context menus. When the mouse goes down,
2394// fire off a short timer. If the timer goes off and we have yet to fire the
2395// drag gesture (ie, the mouse hasn't moved a certain distance), then we can
2396// assume the user wants a click-hold, so fire a context-click event. We only
2397// want to cancel the drag gesture if the context-click event is handled.
2398//
2399void EventStateManager::BeginTrackingDragGesture(nsPresContext* aPresContext,
2400                                                 WidgetMouseEvent* inDownEvent,
2401                                                 nsIFrame* inDownFrame) {
2402  if (!inDownEvent->mWidget) {
2403    return;
2404  }
2405 
2406  // Note that |inDownEvent| could be either a mouse down event or a
2407  // synthesized mouse move event.
2408  SetGestureDownPoint(inDownEvent);
2409 
2410  if (inDownFrame) {
2411    inDownFrame->GetContentForEvent(inDownEvent,
2412                                    getter_AddRefs(mGestureDownContent));
2413 
2414    mGestureDownFrameOwner = inDownFrame->GetContent();
2415    if (!mGestureDownFrameOwner) {
2416      mGestureDownFrameOwner = mGestureDownContent;
2417    }
2418  }
2419  mGestureModifiers = inDownEvent->mModifiers;
2420  mGestureDownButtons = inDownEvent->mButtons;
2421  mGestureDownButton = inDownEvent->mButton;
2422 
2423  if (inDownEvent->mMessage != eMouseTouchDrag &&
2424      StaticPrefs::ui_click_hold_context_menus()) {
2425    // fire off a timer to track click-hold
2426    CreateClickHoldTimer(aPresContext, inDownFrame, inDownEvent);
2427  }
2428}
2429 
2430void EventStateManager::SetGestureDownPoint(WidgetGUIEvent* aEvent) {
2431  mGestureDownPoint =
2432      GetEventRefPoint(aEvent) + aEvent->mWidget->WidgetToScreenOffset();
2433}
2434 
2435LayoutDeviceIntPoint EventStateManager::GetEventRefPoint(
2436    WidgetEvent* aEvent) const {
2437  auto touchEvent = aEvent->AsTouchEvent();
2438  return (touchEvent && !touchEvent->mTouches.IsEmpty())
2439             ? aEvent->AsTouchEvent()->mTouches[0]->mRefPoint
2440             : aEvent->mRefPoint;
2441}
2442 
2443void EventStateManager::BeginTrackingRemoteDragGesture(
2444    nsIContent* aContent, RemoteDragStartData* aDragStartData) {
2445  mGestureDownContent = aContent;
2446  mGestureDownFrameOwner = aContent;
2447  mGestureDownInTextControl =
2448      aContent && aContent->IsInNativeAnonymousSubtree() &&
2449      TextControlElement::FromNodeOrNull(
2450          aContent->GetClosestNativeAnonymousSubtreeRootParentOrHost());
2451  mGestureDownDragStartData = aDragStartData;
2452}
2453 
2454//
2455// StopTrackingDragGesture
2456//
2457// Record that the mouse has gone back up so that we should leave the TRACKING
2458// state of d&d gesture tracker and return to the START state.
2459//
2460void EventStateManager::StopTrackingDragGesture(bool aClearInChildProcesses) {
2461  mGestureDownContent = nullptr;
2462  mGestureDownFrameOwner = nullptr;
2463  mGestureDownInTextControl = false;
2464  mGestureDownDragStartData = nullptr;
2465 
2466  // If a content process starts a drag but the mouse is released before the
2467  // parent starts the actual drag, the content process will think a drag is
2468  // still happening. Inform any child processes with active drags that the drag
2469  // should be stopped.
2470  if (!aClearInChildProcesses || !XRE_IsParentProcess()) {
2471    return;
2472  }
2473 
2474  // Only notify if there is NOT a drag session active in the parent.
2475  RefPtr<nsIDragSession> dragSession =
2476      nsContentUtils::GetDragSession(mPresContext);
2477  if (dragSession) {
2478    return;
2479  }
2480  nsCOMPtr<nsIDragService> dragService =
2481      do_GetService("@mozilla.org/widget/dragservice;1");
2482  if (!dragService) {
2483    return;
2484  }
2485  dragService->RemoveAllBrowsers();
2486}
2487 
2488void EventStateManager::FillInEventFromGestureDown(WidgetMouseEvent* aEvent) {
2489  NS_ASSERTION(aEvent->mWidget == mCurrentTarget->GetNearestWidget(),do { if (!(aEvent->mWidget == mCurrentTarget->GetNearestWidget
())) { NS_DebugBreak(NS_DEBUG_ASSERTION, "Incorrect widget in event"
, "aEvent->mWidget == mCurrentTarget->GetNearestWidget()"
, "/var/lib/jenkins/workspace/firefox-scan-build/dom/events/EventStateManager.cpp"
, 2490); MOZ_PretendNoReturn(); } } while (0)
2490               "Incorrect widget in event")do { if (!(aEvent->mWidget == mCurrentTarget->GetNearestWidget
())) { NS_DebugBreak(NS_DEBUG_ASSERTION, "Incorrect widget in event"
, "aEvent->mWidget == mCurrentTarget->GetNearestWidget()"
, "/var/lib/jenkins/workspace/firefox-scan-build/dom/events/EventStateManager.cpp"
, 2490); MOZ_PretendNoReturn(); } } while (0);
2491 
2492  // Set the coordinates in the new event to the coordinates of
2493  // the old event, adjusted for the fact that the widget might be
2494  // different
2495  aEvent->mRefPoint =
2496      mGestureDownPoint - aEvent->mWidget->WidgetToScreenOffset();
2497  aEvent->mModifiers = mGestureModifiers;
2498  aEvent->mButtons = mGestureDownButtons;
2499  if (aEvent->mMessage == eContextMenu) {
2500    aEvent->mButton = mGestureDownButton;
2501  }
2502}
2503 
2504void EventStateManager::MaybeFirePointerCancel(WidgetInputEvent* aEvent) {
2505  RefPtr<PresShell> presShell = mPresContext->GetPresShell();
2506  AutoWeakFrame targetFrame = mCurrentTarget;
2507 
2508  if (!presShell || !targetFrame) {
2509    return;
2510  }
2511 
2512  nsCOMPtr<nsIContent> content;
2513  targetFrame->GetContentForEvent(aEvent, getter_AddRefs(content));
2514  if (!content) {
2515    return;
2516  }
2517 
2518  nsEventStatus status = nsEventStatus_eIgnore;
2519 
2520  if (WidgetMouseEvent* aMouseEvent = aEvent->AsMouseEvent()) {
2521    WidgetPointerEvent event(*aMouseEvent);
2522    PointerEventHandler::InitPointerEventFromMouse(&event, aMouseEvent,
2523                                                   ePointerCancel);
2524 
2525    event.convertToPointer = false;
2526    presShell->HandleEventWithTarget(&event, targetFrame, content, &status);
2527  } else if (WidgetTouchEvent* aTouchEvent = aEvent->AsTouchEvent()) {
2528    WidgetPointerEvent event(aTouchEvent->IsTrusted(), ePointerCancel,
2529                             aTouchEvent->mWidget);
2530 
2531    PointerEventHandler::InitPointerEventFromTouch(event, *aTouchEvent,
2532                                                   *aTouchEvent->mTouches[0]);
2533 
2534    event.convertToPointer = false;
2535    presShell->HandleEventWithTarget(&event, targetFrame, content, &status);
2536  } else {
2537    MOZ_ASSERT(false)do { static_assert( mozilla::detail::AssertionConditionType<
decltype(false)>::isValid, "invalid assertion condition");
 if ((__builtin_expect(!!(!(!!(false))), 0))) { do { } while (
false); MOZ_ReportAssertionFailure("false", "/var/lib/jenkins/workspace/firefox-scan-build/dom/events/EventStateManager.cpp"
, 2537); AnnotateMozCrashReason("MOZ_ASSERT" "(" "false" ")")
; do { *((volatile int*)__null) = 2537; __attribute__((nomerge
)) ::abort(); } while (false); } } while (false);
2538  }
2539 
2540  // HandleEventWithTarget clears out mCurrentTarget, which may be used in the
2541  // caller GenerateDragGesture. We have to restore mCurrentTarget.
2542  mCurrentTarget = targetFrame;
2543}
2544 
2545bool EventStateManager::IsEventOutsideDragThreshold(
2546    WidgetInputEvent* aEvent) const {
2547  static int32_t sPixelThresholdX = 0;
2548  static int32_t sPixelThresholdY = 0;
2549 
2550  if (!sPixelThresholdX) {
2551    sPixelThresholdX =
2552        LookAndFeel::GetInt(LookAndFeel::IntID::DragThresholdX, 0);
2553    sPixelThresholdY =
2554        LookAndFeel::GetInt(LookAndFeel::IntID::DragThresholdY, 0);
2555    if (sPixelThresholdX <= 0) {
2556      sPixelThresholdX = 5;
2557    }
2558    if (sPixelThresholdY <= 0) {
2559      sPixelThresholdY = 5;
2560    }
2561  }
2562 
2563  LayoutDeviceIntPoint pt =
2564      aEvent->mWidget->WidgetToScreenOffset() + GetEventRefPoint(aEvent);
2565  LayoutDeviceIntPoint distance = pt - mGestureDownPoint;
2566  return Abs(distance.x) > sPixelThresholdX ||
2567         Abs(distance.y) > sPixelThresholdY;
2568}
2569 
2570//
2571// GenerateDragGesture
2572//
2573// If we're in the TRACKING state of the d&d gesture tracker, check the current
2574// position of the mouse in relation to the old one. If we've moved a sufficient
2575// amount from the mouse down, then fire off a drag gesture event.
2576void EventStateManager::GenerateDragGesture(nsPresContext* aPresContext,
2577                                            WidgetInputEvent* aEvent) {
2578  NS_ASSERTION(aPresContext, "This shouldn't happen.")do { if (!(aPresContext)) { NS_DebugBreak(NS_DEBUG_ASSERTION,
 "This shouldn't happen.", "aPresContext", "/var/lib/jenkins/workspace/firefox-scan-build/dom/events/EventStateManager.cpp"
, 2578); MOZ_PretendNoReturn(); } } while (0);
2579  if (!IsTrackingDragGesture()) {
2580    return;
2581  }
2582 
2583  AutoWeakFrame targetFrameBefore = mCurrentTarget;
2584  auto autoRestore = MakeScopeExit([&] { mCurrentTarget = targetFrameBefore; });
2585  mCurrentTarget = mGestureDownFrameOwner->GetPrimaryFrame();
2586 
2587  if (!mCurrentTarget || !mCurrentTarget->GetNearestWidget()) {
2588    StopTrackingDragGesture(true);
2589    return;
2590  }
2591 
2592  // Check if selection is tracking drag gestures, if so
2593  // don't interfere!
2594  if (mCurrentTarget) {
2595    RefPtr<nsFrameSelection> frameSel = mCurrentTarget->GetFrameSelection();
2596    if (frameSel && frameSel->GetDragState()) {
2597      StopTrackingDragGesture(true);
2598      return;
2599    }
2600  }
2601 
2602  // If non-native code is capturing the mouse don't start a drag.
2603  if (PresShell::IsMouseCapturePreventingDrag()) {
2604    StopTrackingDragGesture(true);
2605    return;
2606  }
2607 
2608  if (!IsEventOutsideDragThreshold(aEvent)) {
2609    // To keep the old behavior, flush layout even if we don't start dnd.
2610    FlushLayout(aPresContext);
2611    return;
2612  }
2613 
2614  if (StaticPrefs::ui_click_hold_context_menus()) {
2615    // stop the click-hold before we fire off the drag gesture, in case
2616    // it takes a long time
2617    KillClickHoldTimer();
2618  }
2619 
2620  nsCOMPtr<nsIDocShell> docshell = aPresContext->GetDocShell();
2621  if (!docshell) {
2622    return;
2623  }
2624 
2625  nsCOMPtr<nsPIDOMWindowOuter> window = docshell->GetWindow();
2626  if (!window) return;
2627 
2628  RefPtr<DataTransfer> dataTransfer =
2629      new DataTransfer(window, eDragStart, /* aIsExternal */ false,
2630                       /* aClipboardType */ Nothing());
2631  auto protectDataTransfer = MakeScopeExit([&] {
2632    if (dataTransfer) {
2633      dataTransfer->Disconnect();
2634    }
2635  });
2636 
2637  RefPtr<Selection> selection;
2638  RefPtr<RemoteDragStartData> remoteDragStartData;
2639  nsCOMPtr<nsIContent> eventContent, targetContent;
2640  nsCOMPtr<nsIPrincipal> principal;
2641  nsCOMPtr<nsIContentSecurityPolicy> csp;
2642  nsCOMPtr<nsICookieJarSettings> cookieJarSettings;
2643  bool allowEmptyDataTransfer = false;
2644  mCurrentTarget->GetContentForEvent(aEvent, getter_AddRefs(eventContent));
2645  if (eventContent) {
2646    // If the content is a text node in a password field, we shouldn't
2647    // allow to drag its raw text.  Note that we've supported drag from
2648    // password fields but dragging data was masked text.  So, it doesn't
2649    // make sense anyway.
2650    if (eventContent->IsText() && eventContent->HasFlag(NS_MAYBE_MASKED)) {
2651      // However, it makes sense to allow to drag selected password text
2652      // when copying selected password is allowed because users may want
2653      // to use drag and drop rather than copy and paste when web apps
2654      // request to input password twice for conforming new password but
2655      // they used password generator.
2656      TextEditor* textEditor =
2657          nsContentUtils::GetTextEditorFromAnonymousNodeWithoutCreation(
2658              eventContent);
2659      if (!textEditor || !textEditor->IsCopyToClipboardAllowed()) {
2660        StopTrackingDragGesture(true);
2661        return;
2662      }
2663    }
2664    DetermineDragTargetAndDefaultData(
2665        window, eventContent, dataTransfer, &allowEmptyDataTransfer,
2666        getter_AddRefs(selection), getter_AddRefs(remoteDragStartData),
2667        getter_AddRefs(targetContent), getter_AddRefs(principal),
2668        getter_AddRefs(csp), getter_AddRefs(cookieJarSettings));
2669  }
2670 
2671  // Stop tracking the drag gesture now. This should stop us from
2672  // reentering GenerateDragGesture inside DOM event processing.
2673  // Pass false to avoid clearing the child process state since a real
2674  // drag should be starting.
2675  StopTrackingDragGesture(false);
2676 
2677  if (!targetContent) return;
2678 
2679  // Use our targetContent, now that we've determined it, as the
2680  // parent object of the DataTransfer.
2681  nsCOMPtr<nsIContent> parentContent =
2682      targetContent->FindFirstNonChromeOnlyAccessContent();
2683  dataTransfer->SetParentObject(parentContent);
2684 
2685  sLastDragOverFrame = nullptr;
2686  nsCOMPtr<nsIWidget> widget = mCurrentTarget->GetNearestWidget();
2687 
2688  // get the widget from the target frame
2689  WidgetDragEvent startEvent(aEvent->IsTrusted(), eDragStart, widget);
2690  startEvent.mFlags.mIsSynthesizedForTests =
2691      aEvent->mFlags.mIsSynthesizedForTests;
2692  FillInEventFromGestureDown(&startEvent);
2693 
2694  startEvent.mDataTransfer = dataTransfer;
2695  if (aEvent->AsMouseEvent()) {
2696    startEvent.mInputSource = aEvent->AsMouseEvent()->mInputSource;
2697  } else if (aEvent->AsTouchEvent()) {
2698    startEvent.mInputSource = MouseEvent_Binding::MOZ_SOURCE_TOUCH;
2699  } else {
2700    MOZ_ASSERT(false)do { static_assert( mozilla::detail::AssertionConditionType<
decltype(false)>::isValid, "invalid assertion condition");
 if ((__builtin_expect(!!(!(!!(false))), 0))) { do { } while (
false); MOZ_ReportAssertionFailure("false", "/var/lib/jenkins/workspace/firefox-scan-build/dom/events/EventStateManager.cpp"
, 2700); AnnotateMozCrashReason("MOZ_ASSERT" "(" "false" ")")
; do { *((volatile int*)__null) = 2700; __attribute__((nomerge
)) ::abort(); } while (false); } } while (false);
2701  }
2702 
2703  // Dispatch to the DOM. By setting mCurrentTarget we are faking
2704  // out the ESM and telling it that the current target frame is
2705  // actually where the mouseDown occurred, otherwise it will use
2706  // the frame the mouse is currently over which may or may not be
2707  // the same.
2708 
2709  // Hold onto old target content through the event and reset after.
2710  nsCOMPtr<nsIContent> targetBeforeEvent = mCurrentTargetContent;
2711 
2712  // Set the current target to the content for the mouse down
2713  mCurrentTargetContent = targetContent;
2714 
2715  // Dispatch the dragstart event to the DOM.
2716  nsEventStatus status = nsEventStatus_eIgnore;
2717  EventDispatcher::Dispatch(targetContent, aPresContext, &startEvent, nullptr,
2718                            &status);
2719 
2720  WidgetDragEvent* event = &startEvent;
2721 
2722  nsCOMPtr<nsIObserverService> observerService =
2723      mozilla::services::GetObserverService();
2724  // Emit observer event to allow addons to modify the DataTransfer
2725  // object.
2726  if (observerService) {
2727    observerService->NotifyObservers(dataTransfer, "on-datatransfer-available",
2728                                     nullptr);
2729  }
2730 
2731  if (status != nsEventStatus_eConsumeNoDefault) {
2732    bool dragStarted = DoDefaultDragStart(aPresContext, event, dataTransfer,
2733                                          allowEmptyDataTransfer, targetContent,
2734                                          selection, remoteDragStartData,
2735                                          principal, csp, cookieJarSettings);
2736    if (dragStarted) {
2737      sActiveESM = nullptr;
2738      MaybeFirePointerCancel(aEvent);
2739      aEvent->StopPropagation();
2740    }
2741  }
2742 
2743  // Reset mCurretTargetContent to what it was
2744  mCurrentTargetContent = targetBeforeEvent;
2745 
2746  // Now flush all pending notifications, for better responsiveness
2747  // while dragging.
2748  FlushLayout(aPresContext);
2749}  // GenerateDragGesture
2750 
2751void EventStateManager::DetermineDragTargetAndDefaultData(
2752    nsPIDOMWindowOuter* aWindow, nsIContent* aSelectionTarget,
2753    DataTransfer* aDataTransfer, bool* aAllowEmptyDataTransfer,
2754    Selection** aSelection, RemoteDragStartData** aRemoteDragStartData,
2755    nsIContent** aTargetNode, nsIPrincipal** aPrincipal,
2756    nsIContentSecurityPolicy** aCsp,
2757    nsICookieJarSettings** aCookieJarSettings) {
2758  *aTargetNode = nullptr;
2759  *aAllowEmptyDataTransfer = false;
2760  nsCOMPtr<nsIContent> dragDataNode;
2761 
2762  nsIContent* editingElement = aSelectionTarget->IsEditable()
2763                                   ? aSelectionTarget->GetEditingHost()
2764                                   : nullptr;
2765 
2766  // In chrome, only allow dragging inside editable areas.
2767  bool isChromeContext = !aWindow->GetBrowsingContext()->IsContent();
2768  if (isChromeContext && !editingElement) {
2769    if (mGestureDownDragStartData) {
2770      // A child process started a drag so use any data it assigned for the dnd
2771      // session.
2772      mGestureDownDragStartData->AddInitialDnDDataTo(aDataTransfer, aPrincipal,
2773                                                     aCsp, aCookieJarSettings);
2774      mGestureDownDragStartData.forget(aRemoteDragStartData);
2775      *aAllowEmptyDataTransfer = true;
2776    }
2777  } else {
2778    mGestureDownDragStartData = nullptr;
2779 
2780    // GetDragData determines if a selection, link or image in the content
2781    // should be dragged, and places the data associated with the drag in the
2782    // data transfer.
2783    // mGestureDownContent is the node where the mousedown event for the drag
2784    // occurred, and aSelectionTarget is the node to use when a selection is
2785    // used
2786    bool canDrag;
2787    bool wasAlt = (mGestureModifiers & MODIFIER_ALT) != 0;
2788    nsresult rv = nsContentAreaDragDrop::GetDragData(
2789        aWindow, mGestureDownContent, aSelectionTarget, wasAlt, aDataTransfer,
2790        &canDrag, aSelection, getter_AddRefs(dragDataNode), aCsp,
2791        aCookieJarSettings);
2792    if (NS_FAILED(rv)((bool)(__builtin_expect(!!(NS_FAILED_impl(rv)), 0))) || !canDrag) {
2793      return;
2794    }
2795  }
2796 
2797  // if GetDragData returned a node, use that as the node being dragged.
2798  // Otherwise, if a selection is being dragged, use the node within the
2799  // selection that was dragged. Otherwise, just use the mousedown target.
2800  nsIContent* dragContent = mGestureDownContent;
2801  if (dragDataNode)
2802    dragContent = dragDataNode;
2803  else if (*aSelection)
2804    dragContent = aSelectionTarget;
2805 
2806  nsIContent* originalDragContent = dragContent;
2807 
2808  // If a selection isn't being dragged, look for an ancestor with the
2809  // draggable property set. If one is found, use that as the target of the
2810  // drag instead of the node that was clicked on. If a draggable node wasn't
2811  // found, just use the clicked node.
2812  if (!*aSelection) {
2813    while (dragContent) {
2814      if (auto htmlElement = nsGenericHTMLElement::FromNode(dragContent)) {
2815        if (htmlElement->Draggable()) {
2816          // We let draggable elements to trigger dnd even if there is no data
2817          // in the DataTransfer.
2818          *aAllowEmptyDataTransfer = true;
2819          break;
2820        }
2821      } else {
2822        if (dragContent->IsXULElement()) {
2823          // All XUL elements are draggable, so if a XUL element is
2824          // encountered, stop looking for draggable nodes and just use the
2825          // original clicked node instead.
2826          // XXXndeakin
2827          // In the future, we will want to improve this so that XUL has a
2828          // better way to specify whether something is draggable than just
2829          // on/off.
2830          dragContent = mGestureDownContent;
2831          break;
2832        }
2833        // otherwise, it's not an HTML or XUL element, so just keep looking
2834      }
2835      dragContent = dragContent->GetFlattenedTreeParent();
2836    }
2837  }
2838 
2839  // if no node in the hierarchy was found to drag, but the GetDragData method
2840  // returned a node, use that returned node. Otherwise, nothing is draggable.
2841  if (!dragContent && dragDataNode) dragContent = dragDataNode;
2842 
2843  if (dragContent) {
2844    // if an ancestor node was used instead, clear the drag data
2845    // XXXndeakin rework this a bit. Find a way to just not call GetDragData if
2846    // we don't need to.
2847    if (dragContent != originalDragContent) aDataTransfer->ClearAll();
2848    *aTargetNode = dragContent;
2849    NS_ADDREF(*aTargetNode)(*aTargetNode)->AddRef();
2850  }
2851}
2852 
2853bool EventStateManager::DoDefaultDragStart(
2854    nsPresContext* aPresContext, WidgetDragEvent* aDragEvent,
2855    DataTransfer* aDataTransfer, bool aAllowEmptyDataTransfer,
2856    nsIContent* aDragTarget, Selection* aSelection,
2857    RemoteDragStartData* aDragStartData, nsIPrincipal* aPrincipal,
2858    nsIContentSecurityPolicy* aCsp, nsICookieJarSettings* aCookieJarSettings) {
2859  nsCOMPtr<nsIDragService> dragService =
2860      do_GetService("@mozilla.org/widget/dragservice;1");
2861  if (!dragService) return false;
2862 
2863  // Default handling for the dragstart event.
2864  //
2865  // First, check if a drag session already exists. This means that the drag
2866  // service was called directly within a draggesture handler. In this case,
2867  // don't do anything more, as it is assumed that the handler is managing
2868  // drag and drop manually. Make sure to return true to indicate that a drag
2869  // began.  However, if we're handling drag session for synthesized events,
2870  // we need to initialize some information of the session.  Therefore, we
2871  // need to keep going for synthesized case.
2872  if (MOZ_UNLIKELY(!mPresContext)(__builtin_expect(!!(!mPresContext), 0))) {
2873    return true;
2874  }
2875  nsCOMPtr<nsIDragSession> dragSession =
2876      dragService->GetCurrentSession(mPresContext->GetRootWidget());
2877  if (dragSession && !dragSession->IsSynthesizedForTests()) {
2878    return true;
2879  }
2880 
2881  // No drag session is currently active, so check if a handler added
2882  // any items to be dragged. If not, there isn't anything to drag.
2883  uint32_t count = 0;
2884  if (aDataTransfer) {
2885    count = aDataTransfer->MozItemCount();
2886  }
2887  if (!aAllowEmptyDataTransfer && !count) {
2888    return false;
2889  }
2890 
2891  // Get the target being dragged, which may not be the same as the
2892  // target of the mouse event. If one wasn't set in the
2893  // aDataTransfer during the event handler, just use the original
2894  // target instead.
2895  nsCOMPtr<nsIContent> dragTarget = aDataTransfer->GetDragTarget();
2896  if (!dragTarget) {
2897    dragTarget = aDragTarget;
2898    if (!dragTarget) {
2899      return false;
2900    }
2901  }
2902 
2903  // check which drag effect should initially be used. If the effect was not
2904  // set, just use all actions, otherwise Windows won't allow a drop.
2905  uint32_t action = aDataTransfer->EffectAllowedInt();
2906  if (action == nsIDragService::DRAGDROP_ACTION_UNINITIALIZED) {
2907    action = nsIDragService::DRAGDROP_ACTION_COPY |
2908             nsIDragService::DRAGDROP_ACTION_MOVE |
2909             nsIDragService::DRAGDROP_ACTION_LINK;
2910  }
2911 
2912  // get any custom drag image that was set
2913  int32_t imageX, imageY;
2914  RefPtr<Element> dragImage = aDataTransfer->GetDragImage(&imageX, &imageY);
2915 
2916  nsCOMPtr<nsIArray> transArray = aDataTransfer->GetTransferables(dragTarget);
2917  if (!transArray) {
2918    return false;
2919  }
2920 
2921  RefPtr<DataTransfer> dataTransfer;
2922  if (!dragSession) {
2923    // After this function returns, the DataTransfer will be cleared so it
2924    // appears empty to content. We need to pass a DataTransfer into the Drag
2925    // Session, so we need to make a copy.
2926    aDataTransfer->Clone(aDragTarget, eDrop, aDataTransfer->MozUserCancelled(),
2927                         false, getter_AddRefs(dataTransfer));
2928 
2929    // Copy over the drop effect, as Clone doesn't copy it for us.
2930    dataTransfer->SetDropEffectInt(aDataTransfer->DropEffectInt());
2931  } else {
2932    MOZ_ASSERT(dragSession->IsSynthesizedForTests())do { static_assert( mozilla::detail::AssertionConditionType<
decltype(dragSession->IsSynthesizedForTests())>::isValid
, "invalid assertion condition"); if ((__builtin_expect(!!(!(
!!(dragSession->IsSynthesizedForTests()))), 0))) { do { } while
 (false); MOZ_ReportAssertionFailure("dragSession->IsSynthesizedForTests()"
, "/var/lib/jenkins/workspace/firefox-scan-build/dom/events/EventStateManager.cpp"
, 2932); AnnotateMozCrashReason("MOZ_ASSERT" "(" "dragSession->IsSynthesizedForTests()"
 ")"); do { *((volatile int*)__null) = 2932; __attribute__((nomerge
)) ::abort(); } while (false); } } while (false);
2933    MOZ_ASSERT(aDragEvent->mFlags.mIsSynthesizedForTests)do { static_assert( mozilla::detail::AssertionConditionType<
decltype(aDragEvent->mFlags.mIsSynthesizedForTests)>::isValid
, "invalid assertion condition"); if ((__builtin_expect(!!(!(
!!(aDragEvent->mFlags.mIsSynthesizedForTests))), 0))) { do
 { } while (false); MOZ_ReportAssertionFailure("aDragEvent->mFlags.mIsSynthesizedForTests"
, "/var/lib/jenkins/workspace/firefox-scan-build/dom/events/EventStateManager.cpp"
, 2933); AnnotateMozCrashReason("MOZ_ASSERT" "(" "aDragEvent->mFlags.mIsSynthesizedForTests"
 ")"); do { *((volatile int*)__null) = 2933; __attribute__((nomerge
)) ::abort(); } while (false); } } while (false);
2934    // If we're initializing synthesized drag session, we should use given
2935    // DataTransfer as is because it'll be used with following drag events
2936    // in any tests, therefore it should be set to nsIDragSession.dataTransfer
2937    // because it and DragEvent.dataTransfer should be same instance.
2938    dataTransfer = aDataTransfer;
2939  }
2940 
2941  // XXXndeakin don't really want to create a new drag DOM event
2942  // here, but we need something to pass to the InvokeDragSession
2943  // methods.
2944  RefPtr<DragEvent> event =
2945      NS_NewDOMDragEvent(dragTarget, aPresContext, aDragEvent);
2946 
2947  // Use InvokeDragSessionWithSelection if a selection is being dragged,
2948  // such that the image can be generated from the selected text. However,
2949  // use InvokeDragSessionWithImage if a custom image was set or something
2950  // other than a selection is being dragged.
2951  if (!dragImage && aSelection) {
2952    dragService->InvokeDragSessionWithSelection(
2953        aSelection, aPrincipal, aCsp, aCookieJarSettings, transArray, action,
2954        event, dataTransfer, dragTarget);
2955  } else if (aDragStartData) {
2956    MOZ_ASSERT(XRE_IsParentProcess())do { static_assert( mozilla::detail::AssertionConditionType<
decltype(XRE_IsParentProcess())>::isValid, "invalid assertion condition"
); if ((__builtin_expect(!!(!(!!(XRE_IsParentProcess()))), 0)
)) { do { } while (false); MOZ_ReportAssertionFailure("XRE_IsParentProcess()"
, "/var/lib/jenkins/workspace/firefox-scan-build/dom/events/EventStateManager.cpp"
, 2956); AnnotateMozCrashReason("MOZ_ASSERT" "(" "XRE_IsParentProcess()"
 ")"); do { *((volatile int*)__null) = 2956; __attribute__((nomerge
)) ::abort(); } while (false); } } while (false);
2957    dragService->InvokeDragSessionWithRemoteImage(
2958        dragTarget, aPrincipal, aCsp, aCookieJarSettings, transArray, action,
2959        aDragStartData, event, dataTransfer);
2960  } else {
2961    dragService->InvokeDragSessionWithImage(
2962        dragTarget, aPrincipal, aCsp, aCookieJarSettings, transArray, action,
2963        dragImage, imageX, imageY, event, dataTransfer);
2964  }
2965 
2966  return true;
2967}
2968 
2969void EventStateManager::ChangeZoom(bool aIncrease) {
2970  // Send the zoom change to the top level browser so it will be handled by the
2971  // front end in the same way as other zoom actions.
2972  nsIDocShell* docShell = mDocument->GetDocShell();
2973  if (!docShell) {
2974    return;
2975  }
2976 
2977  BrowsingContext* bc = docShell->GetBrowsingContext();
2978  if (!bc) {
2979    return;
2980  }
2981 
2982  if (XRE_IsParentProcess()) {
2983    bc->Canonical()->DispatchWheelZoomChange(aIncrease);
2984  } else if (BrowserChild* child = BrowserChild::GetFrom(docShell)) {
2985    child->SendWheelZoomChange(aIncrease);
2986  }
2987}
2988 
2989void EventStateManager::DoScrollHistory(int32_t direction) {
2990  nsCOMPtr<nsISupports> pcContainer(mPresContext->GetContainerWeak());
2991  if (pcContainer) {
2992    nsCOMPtr<nsIWebNavigation> webNav(do_QueryInterface(pcContainer));
2993    if (webNav) {
2994      // positive direction to go back one step, nonpositive to go forward
2995      // This is doing user-initiated history traversal, hence we want
2996      // to require that history entries we navigate to have user interaction.
2997      if (direction > 0)
2998        webNav->GoBack(StaticPrefs::browser_navigation_requireUserInteraction(),
2999                       true);
3000      else
3001        webNav->GoForward(
3002            StaticPrefs::browser_navigation_requireUserInteraction(), true);
3003    }
3004  }
3005}
3006 
3007void EventStateManager::DoScrollZoom(nsIFrame* aTargetFrame,
3008                                     int32_t adjustment) {
3009  // Exclude content in chrome docshells.
3010  nsIContent* content = aTargetFrame->GetContent();
3011  if (content && !nsContentUtils::IsInChromeDocshell(content->OwnerDoc())) {
3012    // Positive adjustment to decrease zoom, negative to increase
3013    const bool increase = adjustment <= 0;
3014    EnsureDocument(mPresContext);
3015    ChangeZoom(increase);
3016  }
3017}
3018 
3019static nsIFrame* GetParentFrameToScroll(nsIFrame* aFrame) {
3020  if (!aFrame) return nullptr;
3021 
3022  if (aFrame->StyleDisplay()->mPosition == StylePositionProperty::Fixed &&
3023      nsLayoutUtils::IsReallyFixedPos(aFrame)) {
3024    return aFrame->PresShell()->GetRootScrollContainerFrame();
3025  }
3026  return aFrame->GetParent();
3027}
3028 
3029void EventStateManager::DispatchLegacyMouseScrollEvents(
3030    nsIFrame* aTargetFrame, WidgetWheelEvent* aEvent, nsEventStatus* aStatus) {
3031  MOZ_ASSERT(aEvent)do { static_assert( mozilla::detail::AssertionConditionType<
decltype(aEvent)>::isValid, "invalid assertion condition")
; if ((__builtin_expect(!!(!(!!(aEvent))), 0))) { do { } while
 (false); MOZ_ReportAssertionFailure("aEvent", "/var/lib/jenkins/workspace/firefox-scan-build/dom/events/EventStateManager.cpp"
, 3031); AnnotateMozCrashReason("MOZ_ASSERT" "(" "aEvent" ")"
); do { *((volatile int*)__null) = 3031; __attribute__((nomerge
)) ::abort(); } while (false); } } while (false);
3032  MOZ_ASSERT(aStatus)do { static_assert( mozilla::detail::AssertionConditionType<
decltype(aStatus)>::isValid, "invalid assertion condition"
); if ((__builtin_expect(!!(!(!!(aStatus))), 0))) { do { } while
 (false); MOZ_ReportAssertionFailure("aStatus", "/var/lib/jenkins/workspace/firefox-scan-build/dom/events/EventStateManager.cpp"
, 3032); AnnotateMozCrashReason("MOZ_ASSERT" "(" "aStatus" ")"
); do { *((volatile int*)__null) = 3032; __attribute__((nomerge
)) ::abort(); } while (false); } } while (false);
3033 
3034  if (!aTargetFrame || *aStatus == nsEventStatus_eConsumeNoDefault) {
3035    return;
3036  }
3037 
3038  // Ignore mouse wheel transaction for computing legacy mouse wheel
3039  // events' delta value.
3040  // DOM event's delta vales are computed from CSS pixels.
3041  auto scrollAmountInCSSPixels =
3042      CSSIntSize::FromAppUnitsRounded(aEvent->mScrollAmount);
3043 
3044  // XXX We don't deal with fractional amount in legacy event, though the
3045  //     default action handler (DoScrollText()) deals with it.
3046  //     If we implemented such strict computation, we would need additional
3047  //     accumulated delta values. It would made the code more complicated.
3048  //     And also it would computes different delta values from older version.
3049  //     It doesn't make sense to implement such code for legacy events and
3050  //     rare cases.
3051  int32_t scrollDeltaX, scrollDeltaY, pixelDeltaX, pixelDeltaY;
3052  switch (aEvent->mDeltaMode) {
3053    case WheelEvent_Binding::DOM_DELTA_PAGE:
3054      scrollDeltaX = !aEvent->mLineOrPageDeltaX
3055                         ? 0
3056                         : (aEvent->mLineOrPageDeltaX > 0
3057                                ? UIEvent_Binding::SCROLL_PAGE_DOWN
3058                                : UIEvent_Binding::SCROLL_PAGE_UP);
3059      scrollDeltaY = !aEvent->mLineOrPageDeltaY
3060                         ? 0
3061                         : (aEvent->mLineOrPageDeltaY > 0
3062                                ? UIEvent_Binding::SCROLL_PAGE_DOWN
3063                                : UIEvent_Binding::SCROLL_PAGE_UP);
3064      pixelDeltaX = RoundDown(aEvent->mDeltaX * scrollAmountInCSSPixels.width);
3065      pixelDeltaY = RoundDown(aEvent->mDeltaY * scrollAmountInCSSPixels.height);
3066      break;
3067 
3068    case WheelEvent_Binding::DOM_DELTA_LINE:
3069      scrollDeltaX = aEvent->mLineOrPageDeltaX;
3070      scrollDeltaY = aEvent->mLineOrPageDeltaY;
3071      pixelDeltaX = RoundDown(aEvent->mDeltaX * scrollAmountInCSSPixels.width);
3072      pixelDeltaY = RoundDown(aEvent->mDeltaY * scrollAmountInCSSPixels.height);
3073      break;
3074 
3075    case WheelEvent_Binding::DOM_DELTA_PIXEL:
3076      scrollDeltaX = aEvent->mLineOrPageDeltaX;
3077      scrollDeltaY = aEvent->mLineOrPageDeltaY;
3078      pixelDeltaX = RoundDown(aEvent->mDeltaX);
3079      pixelDeltaY = RoundDown(aEvent->mDeltaY);
3080      break;
3081 
3082    default:
3083      MOZ_CRASH("Invalid deltaMode value comes")do { do { } while (false); MOZ_ReportCrash("" "Invalid deltaMode value comes"
, "/var/lib/jenkins/workspace/firefox-scan-build/dom/events/EventStateManager.cpp"
, 3083); AnnotateMozCrashReason("MOZ_CRASH(" "Invalid deltaMode value comes"
 ")"); do { *((volatile int*)__null) = 3083; __attribute__((nomerge
)) ::abort(); } while (false); } while (false);
3084  }
3085 
3086  // Send the legacy events in following order:
3087  // 1. Vertical scroll
3088  // 2. Vertical pixel scroll (even if #1 isn't consumed)
3089  // 3. Horizontal scroll (even if #1 and/or #2 are consumed)
3090  // 4. Horizontal pixel scroll (even if #3 isn't consumed)
3091 
3092  AutoWeakFrame targetFrame(aTargetFrame);
3093 
3094  MOZ_ASSERT(*aStatus != nsEventStatus_eConsumeNoDefault &&do { static_assert( mozilla::detail::AssertionConditionType<
decltype(*aStatus != nsEventStatus_eConsumeNoDefault &&
 !aEvent->DefaultPrevented())>::isValid, "invalid assertion condition"
); if ((__builtin_expect(!!(!(!!(*aStatus != nsEventStatus_eConsumeNoDefault
 && !aEvent->DefaultPrevented()))), 0))) { do { } while
 (false); MOZ_ReportAssertionFailure("*aStatus != nsEventStatus_eConsumeNoDefault && !aEvent->DefaultPrevented()"
 " (" "If you make legacy events dispatched for default prevented wheel "
 "event, you need to initialize stateX and stateY" ")", "/var/lib/jenkins/workspace/firefox-scan-build/dom/events/EventStateManager.cpp"
, 3097); AnnotateMozCrashReason("MOZ_ASSERT" "(" "*aStatus != nsEventStatus_eConsumeNoDefault && !aEvent->DefaultPrevented()"
 ") (" "If you make legacy events dispatched for default prevented wheel "
 "event, you need to initialize stateX and stateY" ")"); do {
 *((volatile int*)__null) = 3097; __attribute__((nomerge)) ::
abort(); } while (false); } } while (false)
3095                 !aEvent->DefaultPrevented(),do { static_assert( mozilla::detail::AssertionConditionType<
decltype(*aStatus != nsEventStatus_eConsumeNoDefault &&
 !aEvent->DefaultPrevented())>::isValid, "invalid assertion condition"
); if ((__builtin_expect(!!(!(!!(*aStatus != nsEventStatus_eConsumeNoDefault
 && !aEvent->DefaultPrevented()))), 0))) { do { } while
 (false); MOZ_ReportAssertionFailure("*aStatus != nsEventStatus_eConsumeNoDefault && !aEvent->DefaultPrevented()"
 " (" "If you make legacy events dispatched for default prevented wheel "
 "event, you need to initialize stateX and stateY" ")", "/var/lib/jenkins/workspace/firefox-scan-build/dom/events/EventStateManager.cpp"
, 3097); AnnotateMozCrashReason("MOZ_ASSERT" "(" "*aStatus != nsEventStatus_eConsumeNoDefault && !aEvent->DefaultPrevented()"
 ") (" "If you make legacy events dispatched for default prevented wheel "
 "event, you need to initialize stateX and stateY" ")"); do {
 *((volatile int*)__null) = 3097; __attribute__((nomerge)) ::
abort(); } while (false); } } while (false)
3096             "If you make legacy events dispatched for default prevented wheel "do { static_assert( mozilla::detail::AssertionConditionType<
decltype(*aStatus != nsEventStatus_eConsumeNoDefault &&
 !aEvent->DefaultPrevented())>::isValid, "invalid assertion condition"
); if ((__builtin_expect(!!(!(!!(*aStatus != nsEventStatus_eConsumeNoDefault
 && !aEvent->DefaultPrevented()))), 0))) { do { } while
 (false); MOZ_ReportAssertionFailure("*aStatus != nsEventStatus_eConsumeNoDefault && !aEvent->DefaultPrevented()"
 " (" "If you make legacy events dispatched for default prevented wheel "
 "event, you need to initialize stateX and stateY" ")", "/var/lib/jenkins/workspace/firefox-scan-build/dom/events/EventStateManager.cpp"
, 3097); AnnotateMozCrashReason("MOZ_ASSERT" "(" "*aStatus != nsEventStatus_eConsumeNoDefault && !aEvent->DefaultPrevented()"
 ") (" "If you make legacy events dispatched for default prevented wheel "
 "event, you need to initialize stateX and stateY" ")"); do {
 *((volatile int*)__null) = 3097; __attribute__((nomerge)) ::
abort(); } while (false); } } while (false)
3097             "event, you need to initialize stateX and stateY")do { static_assert( mozilla::detail::AssertionConditionType<
decltype(*aStatus != nsEventStatus_eConsumeNoDefault &&
 !aEvent->DefaultPrevented())>::isValid, "invalid assertion condition"
); if ((__builtin_expect(!!(!(!!(*aStatus != nsEventStatus_eConsumeNoDefault
 && !aEvent->DefaultPrevented()))), 0))) { do { } while
 (false); MOZ_ReportAssertionFailure("*aStatus != nsEventStatus_eConsumeNoDefault && !aEvent->DefaultPrevented()"
 " (" "If you make legacy events dispatched for default prevented wheel "
 "event, you need to initialize stateX and stateY" ")", "/var/lib/jenkins/workspace/firefox-scan-build/dom/events/EventStateManager.cpp"
, 3097); AnnotateMozCrashReason("MOZ_ASSERT" "(" "*aStatus != nsEventStatus_eConsumeNoDefault && !aEvent->DefaultPrevented()"
 ") (" "If you make legacy events dispatched for default prevented wheel "
 "event, you need to initialize stateX and stateY" ")"); do {
 *((volatile int*)__null) = 3097; __attribute__((nomerge)) ::
abort(); } while (false); } } while (false);
3098  EventState stateX, stateY;
3099  if (scrollDeltaY) {
3100    SendLineScrollEvent(aTargetFrame, aEvent, stateY, scrollDeltaY,
3101                        DELTA_DIRECTION_Y);
3102    if (!targetFrame.IsAlive()) {
3103      *aStatus = nsEventStatus_eConsumeNoDefault;
3104      return;
3105    }
3106  }
3107 
3108  if (pixelDeltaY) {
3109    SendPixelScrollEvent(aTargetFrame, aEvent, stateY, pixelDeltaY,
3110                         DELTA_DIRECTION_Y);
3111    if (!targetFrame.IsAlive()) {
3112      *aStatus = nsEventStatus_eConsumeNoDefault;
3113      return;
3114    }
3115  }
3116 
3117  if (scrollDeltaX) {
3118    SendLineScrollEvent(aTargetFrame, aEvent, stateX, scrollDeltaX,
3119                        DELTA_DIRECTION_X);
3120    if (!targetFrame.IsAlive()) {
3121      *aStatus = nsEventStatus_eConsumeNoDefault;
3122      return;
3123    }
3124  }
3125 
3126  if (pixelDeltaX) {
3127    SendPixelScrollEvent(aTargetFrame, aEvent, stateX, pixelDeltaX,
3128                         DELTA_DIRECTION_X);
3129    if (!targetFrame.IsAlive()) {
3130      *aStatus = nsEventStatus_eConsumeNoDefault;
3131      return;
3132    }
3133  }
3134 
3135  if (stateY.mDefaultPrevented) {
3136    *aStatus = nsEventStatus_eConsumeNoDefault;
3137    aEvent->PreventDefault(!stateY.mDefaultPreventedByContent);
3138  }
3139 
3140  if (stateX.mDefaultPrevented) {
3141    *aStatus = nsEventStatus_eConsumeNoDefault;
3142    aEvent->PreventDefault(!stateX.mDefaultPreventedByContent);
3143  }
3144}
3145 
3146void EventStateManager::SendLineScrollEvent(nsIFrame* aTargetFrame,
3147                                            WidgetWheelEvent* aEvent,
3148                                            EventState& aState, int32_t aDelta,
3149                                            DeltaDirection aDeltaDirection) {
3150  nsCOMPtr<nsIContent> targetContent = aTargetFrame->GetContent();
3151  if (!targetContent) {
3152    targetContent = GetFocusedElement();
3153    if (!targetContent) {
3154      return;
3155    }
3156  }
3157 
3158  while (targetContent->IsText()) {
3159    targetContent = targetContent->GetFlattenedTreeParent();
3160  }
3161 
3162  WidgetMouseScrollEvent event(aEvent->IsTrusted(),
3163                               eLegacyMouseLineOrPageScroll, aEvent->mWidget);
3164  event.mFlags.mDefaultPrevented = aState.mDefaultPrevented;
3165  event.mFlags.mDefaultPreventedByContent = aState.mDefaultPreventedByContent;
3166  event.mRefPoint = aEvent->mRefPoint;
3167  event.mTimeStamp = aEvent->mTimeStamp;
3168  event.mModifiers = aEvent->mModifiers;
3169  event.mButtons = aEvent->mButtons;
3170  event.mIsHorizontal = (aDeltaDirection == DELTA_DIRECTION_X);
3171  event.mDelta = aDelta;
3172  event.mInputSource = aEvent->mInputSource;
3173 
3174  RefPtr<nsPresContext> presContext = aTargetFrame->PresContext();
3175  nsEventStatus status = nsEventStatus_eIgnore;
3176  EventDispatcher::Dispatch(targetContent, presContext, &event, nullptr,
3177                            &status);
3178  aState.mDefaultPrevented =
3179      event.DefaultPrevented() || status == nsEventStatus_eConsumeNoDefault;
3180  aState.mDefaultPreventedByContent = event.DefaultPreventedByContent();
3181}
3182 
3183void EventStateManager::SendPixelScrollEvent(nsIFrame* aTargetFrame,
3184                                             WidgetWheelEvent* aEvent,
3185                                             EventState& aState,
3186                                             int32_t aPixelDelta,
3187                                             DeltaDirection aDeltaDirection) {
3188  nsCOMPtr<nsIContent> targetContent = aTargetFrame->GetContent();
3189  if (!targetContent) {
3190    targetContent = GetFocusedElement();
3191    if (!targetContent) {
3192      return;
3193    }
3194  }
3195 
3196  while (targetContent->IsText()) {
3197    targetContent = targetContent->GetFlattenedTreeParent();
3198  }
3199 
3200  WidgetMouseScrollEvent event(aEvent->IsTrusted(), eLegacyMousePixelScroll,
3201                               aEvent->mWidget);
3202  event.mFlags.mDefaultPrevented = aState.mDefaultPrevented;
3203  event.mFlags.mDefaultPreventedByContent = aState.mDefaultPreventedByContent;
3204  event.mRefPoint = aEvent->mRefPoint;
3205  event.mTimeStamp = aEvent->mTimeStamp;
3206  event.mModifiers = aEvent->mModifiers;
3207  event.mButtons = aEvent->mButtons;
3208  event.mIsHorizontal = (aDeltaDirection == DELTA_DIRECTION_X);
3209  event.mDelta = aPixelDelta;
3210  event.mInputSource = aEvent->mInputSource;
3211 
3212  RefPtr<nsPresContext> presContext = aTargetFrame->PresContext();
3213  nsEventStatus status = nsEventStatus_eIgnore;
3214  EventDispatcher::Dispatch(targetContent, presContext, &event, nullptr,
3215                            &status);
3216  aState.mDefaultPrevented =
3217      event.DefaultPrevented() || status == nsEventStatus_eConsumeNoDefault;
3218  aState.mDefaultPreventedByContent = event.DefaultPreventedByContent();
3219}
3220 
3221ScrollContainerFrame*
3222EventStateManager::ComputeScrollTargetAndMayAdjustWheelEvent(
3223    nsIFrame* aTargetFrame, WidgetWheelEvent* aEvent,
3224    ComputeScrollTargetOptions aOptions) {
3225  return ComputeScrollTargetAndMayAdjustWheelEvent(
3226      aTargetFrame, aEvent->mDeltaX, aEvent->mDeltaY, aEvent, aOptions);
3227}
3228 
3229// Overload ComputeScrollTargetAndMayAdjustWheelEvent method to allow passing
3230// "test" dx and dy when looking for which scrollbarmediators to activate when
3231// two finger down on trackpad and before any actual motion
3232ScrollContainerFrame*
3233EventStateManager::ComputeScrollTargetAndMayAdjustWheelEvent(
3234    nsIFrame* aTargetFrame, double aDirectionX, double aDirectionY,
3235    WidgetWheelEvent* aEvent, ComputeScrollTargetOptions aOptions) {
3236  bool isAutoDir = false;
3237  bool honoursRoot = false;
3238  if (MAY_BE_ADJUSTED_BY_AUTO_DIR & aOptions) {
3239    // If the scroll is respected as auto-dir, aDirection* should always be
3240    // equivalent to the event's delta vlaues(Currently, there are only one case
3241    // where aDirection*s have different values from the widget wheel event's
3242    // original delta values and the only case isn't auto-dir, see
3243    // ScrollbarsForWheel::TemporarilyActivateAllPossibleScrollTargets).
3244    MOZ_ASSERT(aDirectionX == aEvent->mDeltaX &&do { static_assert( mozilla::detail::AssertionConditionType<
decltype(aDirectionX == aEvent->mDeltaX && aDirectionY
 == aEvent->mDeltaY)>::isValid, "invalid assertion condition"
); if ((__builtin_expect(!!(!(!!(aDirectionX == aEvent->mDeltaX
 && aDirectionY == aEvent->mDeltaY))), 0))) { do {
 } while (false); MOZ_ReportAssertionFailure("aDirectionX == aEvent->mDeltaX && aDirectionY == aEvent->mDeltaY"
, "/var/lib/jenkins/workspace/firefox-scan-build/dom/events/EventStateManager.cpp"
, 3245); AnnotateMozCrashReason("MOZ_ASSERT" "(" "aDirectionX == aEvent->mDeltaX && aDirectionY == aEvent->mDeltaY"
 ")"); do { *((volatile int*)__null) = 3245; __attribute__((nomerge
)) ::abort(); } while (false); } } while (false)
3245               aDirectionY == aEvent->mDeltaY)do { static_assert( mozilla::detail::AssertionConditionType<
decltype(aDirectionX == aEvent->mDeltaX && aDirectionY
 == aEvent->mDeltaY)>::isValid, "invalid assertion condition"
); if ((__builtin_expect(!!(!(!!(aDirectionX == aEvent->mDeltaX
 && aDirectionY == aEvent->mDeltaY))), 0))) { do {
 } while (false); MOZ_ReportAssertionFailure("aDirectionX == aEvent->mDeltaX && aDirectionY == aEvent->mDeltaY"
, "/var/lib/jenkins/workspace/firefox-scan-build/dom/events/EventStateManager.cpp"
, 3245); AnnotateMozCrashReason("MOZ_ASSERT" "(" "aDirectionX == aEvent->mDeltaX && aDirectionY == aEvent->mDeltaY"
 ")"); do { *((volatile int*)__null) = 3245; __attribute__((nomerge
)) ::abort(); } while (false); } } while (false);
3246 
3247    WheelDeltaAdjustmentStrategy strategy =
3248        GetWheelDeltaAdjustmentStrategy(*aEvent);
3249    switch (strategy) {
3250      case WheelDeltaAdjustmentStrategy::eAutoDir:
3251        isAutoDir = true;
3252        honoursRoot = false;
3253        break;
3254      case WheelDeltaAdjustmentStrategy::eAutoDirWithRootHonour:
3255        isAutoDir = true;
3256        honoursRoot = true;
3257        break;
3258      default:
3259        break;
3260    }
3261  }
3262 
3263  if (aOptions & PREFER_MOUSE_WHEEL_TRANSACTION) {
3264    // If the user recently scrolled with the mousewheel, then they probably
3265    // want to scroll the same view as before instead of the view under the
3266    // cursor.  WheelTransaction tracks the frame currently being
3267    // scrolled with the mousewheel. We consider the transaction ended when the
3268    // mouse moves more than "mousewheel.transaction.ignoremovedelay"
3269    // milliseconds after the last scroll operation, or any time the mouse moves
3270    // out of the frame, or when more than "mousewheel.transaction.timeout"
3271    // milliseconds have passed after the last operation, even if the mouse
3272    // hasn't moved.
3273    nsIFrame* lastScrollFrame = WheelTransaction::GetScrollTargetFrame();
3274    if (lastScrollFrame) {
3275      ScrollContainerFrame* scrollContainerFrame =
3276          lastScrollFrame->GetScrollTargetFrame();
3277      if (scrollContainerFrame) {
3278        if (isAutoDir) {
3279          ESMAutoDirWheelDeltaAdjuster adjuster(*aEvent, *lastScrollFrame,
3280                                                honoursRoot);
3281          // Note that calling this function will not always cause the delta to
3282          // be adjusted, it only adjusts the delta when it should, because
3283          // Adjust() internally calls ShouldBeAdjusted() before making
3284          // adjustment.
3285          adjuster.Adjust();
3286        }
3287        return scrollContainerFrame;
3288      }
3289    }
3290  }
3291 
3292  // If the event doesn't cause scroll actually, we cannot find scroll target
3293  // because we check if the event can cause scroll actually on each found
3294  // scrollable frame.
3295  if (!aDirectionX && !aDirectionY) {
3296    return nullptr;
3297  }
3298 
3299  bool checkIfScrollableX;
3300  bool checkIfScrollableY;
3301  if (isAutoDir) {
3302    // Always check the frame's scrollability in both the two directions for an
3303    // auto-dir scroll. That is, for an auto-dir scroll,
3304    // PREFER_ACTUAL_SCROLLABLE_TARGET_ALONG_X_AXIS and
3305    // PREFER_ACTUAL_SCROLLABLE_TARGET_ALONG_Y_AXIS should be ignored.
3306    checkIfScrollableX = true;
3307    checkIfScrollableY = true;
3308  } else {
3309    checkIfScrollableX =
3310        aDirectionX &&
3311        (aOptions & PREFER_ACTUAL_SCROLLABLE_TARGET_ALONG_X_AXIS);
3312    checkIfScrollableY =
3313        aDirectionY &&
3314        (aOptions & PREFER_ACTUAL_SCROLLABLE_TARGET_ALONG_Y_AXIS);
3315  }
3316 
3317  nsIFrame* scrollFrame = !(aOptions & START_FROM_PARENT)
3318                              ? aTargetFrame
3319                              : GetParentFrameToScroll(aTargetFrame);
3320  for (; scrollFrame; scrollFrame = GetParentFrameToScroll(scrollFrame)) {
3321    // Check whether the frame wants to provide us with a scrollable view.
3322    ScrollContainerFrame* scrollContainerFrame =
3323        scrollFrame->GetScrollTargetFrame();
3324    if (!scrollContainerFrame) {
3325      nsMenuPopupFrame* menuPopupFrame = do_QueryFrame(scrollFrame);
3326      if (menuPopupFrame) {
3327        return nullptr;
3328      }
3329      continue;
3330    }
3331 
3332    if (!checkIfScrollableX && !checkIfScrollableY) {
3333      return scrollContainerFrame;
3334    }
3335 
3336    // If the frame disregards the direction the user is trying to scroll, then
3337    // it should just bubbles the scroll event up to its parental scroll frame
3338 
3339    Maybe<layers::ScrollDirection> disregardedDirection =
3340        WheelHandlingUtils::GetDisregardedWheelScrollDirection(scrollFrame);
3341    if (disregardedDirection) {
3342      switch (disregardedDirection.ref()) {
3343        case layers::ScrollDirection::eHorizontal:
3344          if (checkIfScrollableX) {
3345            continue;
3346          }
3347          break;
3348        case layers::ScrollDirection::eVertical:
3349          if (checkIfScrollableY) {
3350            continue;
3351          }
3352          break;
3353      }
3354    }
3355 
3356    layers::ScrollDirections directions =
3357        scrollContainerFrame
3358            ->GetAvailableScrollingDirectionsForUserInputEvents();
3359    if ((!(directions.contains(layers::ScrollDirection::eVertical)) &&
3360         !(directions.contains(layers::ScrollDirection::eHorizontal))) ||
3361        (checkIfScrollableY && !checkIfScrollableX &&
3362         !(directions.contains(layers::ScrollDirection::eVertical))) ||
3363        (checkIfScrollableX && !checkIfScrollableY &&
3364         !(directions.contains(layers::ScrollDirection::eHorizontal)))) {
3365      continue;
3366    }
3367 
3368    // Computes whether the currently checked frame is scrollable by this wheel
3369    // event.
3370    bool canScroll = false;
3371    if (isAutoDir) {
3372      ESMAutoDirWheelDeltaAdjuster adjuster(*aEvent, *scrollFrame, honoursRoot);
3373      if (adjuster.ShouldBeAdjusted()) {
3374        adjuster.Adjust();
3375        canScroll = true;
3376      } else if (WheelHandlingUtils::CanScrollOn(scrollContainerFrame,
3377                                                 aDirectionX, aDirectionY)) {
3378        canScroll = true;
3379      }
3380    } else if (WheelHandlingUtils::CanScrollOn(scrollContainerFrame,
3381                                               aDirectionX, aDirectionY)) {
3382      canScroll = true;
3383    }
3384 
3385    if (canScroll) {
3386      return scrollContainerFrame;
3387    }
3388 
3389    // Where we are at is the block ending in a for loop.
3390    // The current frame has been checked to be unscrollable by this wheel
3391    // event, continue the loop to check its parent, if any.
3392  }
3393 
3394  nsIFrame* newFrame = nsLayoutUtils::GetCrossDocParentFrameInProcess(
3395      aTargetFrame->PresShell()->GetRootFrame());
3396  aOptions =
3397      static_cast<ComputeScrollTargetOptions>(aOptions & ~START_FROM_PARENT);
3398  if (!newFrame) {
3399    return nullptr;
3400  }
3401  return ComputeScrollTargetAndMayAdjustWheelEvent(newFrame, aEvent, aOptions);
3402}
3403 
3404nsSize EventStateManager::GetScrollAmount(
3405    nsPresContext* aPresContext, WidgetWheelEvent* aEvent,
3406    ScrollContainerFrame* aScrollContainerFrame) {
3407  MOZ_ASSERT(aPresContext)do { static_assert( mozilla::detail::AssertionConditionType<
decltype(aPresContext)>::isValid, "invalid assertion condition"
); if ((__builtin_expect(!!(!(!!(aPresContext))), 0))) { do {
 } while (false); MOZ_ReportAssertionFailure("aPresContext", "/var/lib/jenkins/workspace/firefox-scan-build/dom/events/EventStateManager.cpp"
, 3407); AnnotateMozCrashReason("MOZ_ASSERT" "(" "aPresContext"
 ")"); do { *((volatile int*)__null) = 3407; __attribute__((nomerge
)) ::abort(); } while (false); } } while (false);
3408  MOZ_ASSERT(aEvent)do { static_assert( mozilla::detail::AssertionConditionType<
decltype(aEvent)>::isValid, "invalid assertion condition")
; if ((__builtin_expect(!!(!(!!(aEvent))), 0))) { do { } while
 (false); MOZ_ReportAssertionFailure("aEvent", "/var/lib/jenkins/workspace/firefox-scan-build/dom/events/EventStateManager.cpp"
, 3408); AnnotateMozCrashReason("MOZ_ASSERT" "(" "aEvent" ")"
); do { *((volatile int*)__null) = 3408; __attribute__((nomerge
)) ::abort(); } while (false); } } while (false);
3409 
3410  const bool isPage = aEvent->mDeltaMode == WheelEvent_Binding::DOM_DELTA_PAGE;
3411  if (!aScrollContainerFrame) {
3412    // If there is no scrollable frame, we should use root, see below.
3413    aScrollContainerFrame =
3414        aPresContext->PresShell()->GetRootScrollContainerFrame();
3415  }
3416 
3417  if (aScrollContainerFrame) {
3418    return isPage ? aScrollContainerFrame->GetPageScrollAmount()
3419                  : aScrollContainerFrame->GetLineScrollAmount();
3420  }
3421 
3422  // If there is no scrollable frame and page scrolling, use viewport size.
3423  if (isPage) {
3424    return aPresContext->GetVisibleArea().Size();
3425  }
3426 
3427  // Otherwise use root frame's font metrics.
3428  //
3429  // FIXME(emilio): Should this use the root element's style frame? The root
3430  // frame will always have the initial font. Then again it should never matter
3431  // for content, we should always have a root scrollable frame in html
3432  // documents.
3433  nsIFrame* rootFrame = aPresContext->PresShell()->GetRootFrame();
3434  if (!rootFrame) {
3435    return nsSize(0, 0);
3436  }
3437  RefPtr<nsFontMetrics> fm =
3438      nsLayoutUtils::GetInflatedFontMetricsForFrame(rootFrame);
3439  NS_ENSURE_TRUE(fm, nsSize(0, 0))do { if ((__builtin_expect(!!(!(fm)), 0))) { NS_DebugBreak(NS_DEBUG_WARNING
, "NS_ENSURE_TRUE(" "fm" ") failed", nullptr, "/var/lib/jenkins/workspace/firefox-scan-build/dom/events/EventStateManager.cpp"
, 3439); return nsSize(0, 0); } } while (false);
3440  return nsSize(fm->AveCharWidth(), fm->MaxHeight());
3441}
3442 
3443void EventStateManager::DoScrollText(
3444    ScrollContainerFrame* aScrollContainerFrame, WidgetWheelEvent* aEvent) {
3445  MOZ_ASSERT(aScrollContainerFrame)do { static_assert( mozilla::detail::AssertionConditionType<
decltype(aScrollContainerFrame)>::isValid, "invalid assertion condition"
); if ((__builtin_expect(!!(!(!!(aScrollContainerFrame))), 0)
)) { do { } while (false); MOZ_ReportAssertionFailure("aScrollContainerFrame"
, "/var/lib/jenkins/workspace/firefox-scan-build/dom/events/EventStateManager.cpp"
, 3445); AnnotateMozCrashReason("MOZ_ASSERT" "(" "aScrollContainerFrame"
 ")"); do { *((volatile int*)__null) = 3445; __attribute__((nomerge
)) ::abort(); } while (false); } } while (false);
3446  MOZ_ASSERT(aEvent)do { static_assert( mozilla::detail::AssertionConditionType<
decltype(aEvent)>::isValid, "invalid assertion condition")
; if ((__builtin_expect(!!(!(!!(aEvent))), 0))) { do { } while
 (false); MOZ_ReportAssertionFailure("aEvent", "/var/lib/jenkins/workspace/firefox-scan-build/dom/events/EventStateManager.cpp"
, 3446); AnnotateMozCrashReason("MOZ_ASSERT" "(" "aEvent" ")"
); do { *((volatile int*)__null) = 3446; __attribute__((nomerge
)) ::abort(); } while (false); } } while (false);
3447 
3448  AutoWeakFrame scrollFrameWeak(aScrollContainerFrame);
3449  AutoWeakFrame eventFrameWeak(mCurrentTarget);
3450  if (!WheelTransaction::WillHandleDefaultAction(aEvent, scrollFrameWeak,
3451                                                 eventFrameWeak)) {
3452    return;
3453  }
3454 
3455  // Default action's actual scroll amount should be computed from device
3456  // pixels.
3457  nsPresContext* pc = aScrollContainerFrame->PresContext();
3458  nsSize scrollAmount = GetScrollAmount(pc, aEvent, aScrollContainerFrame);
3459  nsIntSize scrollAmountInDevPixels(
3460      pc->AppUnitsToDevPixels(scrollAmount.width),
3461      pc->AppUnitsToDevPixels(scrollAmount.height));
3462  nsIntPoint actualDevPixelScrollAmount =
3463      DeltaAccumulator::GetInstance()->ComputeScrollAmountForDefaultAction(
3464          aEvent, scrollAmountInDevPixels);
3465 
3466  // Don't scroll around the axis whose overflow style is hidden.
3467  ScrollStyles overflowStyle = aScrollContainerFrame->GetScrollStyles();
3468  if (overflowStyle.mHorizontal == StyleOverflow::Hidden) {
3469    actualDevPixelScrollAmount.x = 0;
3470  }
3471  if (overflowStyle.mVertical == StyleOverflow::Hidden) {
3472    actualDevPixelScrollAmount.y = 0;
3473  }
3474 
3475  ScrollSnapFlags snapFlags = ScrollSnapFlags::Disabled;
3476  mozilla::ScrollOrigin origin = mozilla::ScrollOrigin::NotSpecified;
3477  switch (aEvent->mDeltaMode) {
3478    case WheelEvent_Binding::DOM_DELTA_LINE:
3479      origin = mozilla::ScrollOrigin::MouseWheel;
3480      snapFlags = ScrollSnapFlags::IntendedDirection;
3481      break;
3482    case WheelEvent_Binding::DOM_DELTA_PAGE:
3483      origin = mozilla::ScrollOrigin::Pages;
3484      snapFlags = ScrollSnapFlags::IntendedDirection |
3485                  ScrollSnapFlags::IntendedEndPosition;
3486      break;
3487    case WheelEvent_Binding::DOM_DELTA_PIXEL:
3488      origin = mozilla::ScrollOrigin::Pixels;
3489      break;
3490    default:
3491      MOZ_CRASH("Invalid deltaMode value comes")do { do { } while (false); MOZ_ReportCrash("" "Invalid deltaMode value comes"
, "/var/lib/jenkins/workspace/firefox-scan-build/dom/events/EventStateManager.cpp"
, 3491); AnnotateMozCrashReason("MOZ_CRASH(" "Invalid deltaMode value comes"
 ")"); do { *((volatile int*)__null) = 3491; __attribute__((nomerge
)) ::abort(); } while (false); } while (false);
3492  }
3493 
3494  // We shouldn't scroll more one page at once except when over one page scroll
3495  // is allowed for the event.
3496  nsSize pageSize = aScrollContainerFrame->GetPageScrollAmount();
3497  nsIntSize devPixelPageSize(pc->AppUnitsToDevPixels(pageSize.width),
3498                             pc->AppUnitsToDevPixels(pageSize.height));
3499  if (!WheelPrefs::GetInstance()->IsOverOnePageScrollAllowedX(aEvent) &&
3500      DeprecatedAbs(actualDevPixelScrollAmount.x.value) >
3501          devPixelPageSize.width) {
3502    actualDevPixelScrollAmount.x = (actualDevPixelScrollAmount.x >= 0)
3503                                       ? devPixelPageSize.width
3504                                       : -devPixelPageSize.width;
3505  }
3506 
3507  if (!WheelPrefs::GetInstance()->IsOverOnePageScrollAllowedY(aEvent) &&
3508      DeprecatedAbs(actualDevPixelScrollAmount.y.value) >
3509          devPixelPageSize.height) {
3510    actualDevPixelScrollAmount.y = (actualDevPixelScrollAmount.y >= 0)
3511                                       ? devPixelPageSize.height
3512                                       : -devPixelPageSize.height;
3513  }
3514 
3515  bool isDeltaModePixel =
3516      (aEvent->mDeltaMode == WheelEvent_Binding::DOM_DELTA_PIXEL);
3517 
3518  ScrollMode mode;
3519  switch (aEvent->mScrollType) {
3520    case WidgetWheelEvent::SCROLL_DEFAULT:
3521      if (isDeltaModePixel) {
3522        mode = ScrollMode::Normal;
3523      } else if (aEvent->mFlags.mHandledByAPZ) {
3524        mode = ScrollMode::SmoothMsd;
3525      } else {
3526        mode = ScrollMode::Smooth;
3527      }
3528      break;
3529    case WidgetWheelEvent::SCROLL_SYNCHRONOUSLY:
3530      mode = ScrollMode::Instant;
3531      break;
3532    case WidgetWheelEvent::SCROLL_ASYNCHRONOUSLY:
3533      mode = ScrollMode::Normal;
3534      break;
3535    case WidgetWheelEvent::SCROLL_SMOOTHLY:
3536      mode = ScrollMode::Smooth;
3537      break;
3538    default:
3539      MOZ_CRASH("Invalid mScrollType value comes")do { do { } while (false); MOZ_ReportCrash("" "Invalid mScrollType value comes"
, "/var/lib/jenkins/workspace/firefox-scan-build/dom/events/EventStateManager.cpp"
, 3539); AnnotateMozCrashReason("MOZ_CRASH(" "Invalid mScrollType value comes"
 ")"); do { *((volatile int*)__null) = 3539; __attribute__((nomerge
)) ::abort(); } while (false); } while (false);
3540  }
3541 
3542  ScrollContainerFrame::ScrollMomentum momentum =
3543      aEvent->mIsMomentum ? ScrollContainerFrame::SYNTHESIZED_MOMENTUM_EVENT
3544                          : ScrollContainerFrame::NOT_MOMENTUM;
3545 
3546  nsIntPoint overflow;
3547  aScrollContainerFrame->ScrollBy(actualDevPixelScrollAmount,
3548                                  ScrollUnit::DEVICE_PIXELS, mode, &overflow,
3549                                  origin, momentum, snapFlags);
3550 
3551  if (!scrollFrameWeak.IsAlive()) {
3552    // If the scroll causes changing the layout, we can think that the event
3553    // has been completely consumed by the content.  Then, users probably don't
3554    // want additional action.
3555    aEvent->mOverflowDeltaX = aEvent->mOverflowDeltaY = 0;
3556  } else if (isDeltaModePixel) {
3557    aEvent->mOverflowDeltaX = overflow.x;
3558    aEvent->mOverflowDeltaY = overflow.y;
3559  } else {
3560    aEvent->mOverflowDeltaX =
3561        static_cast<double>(overflow.x) / scrollAmountInDevPixels.width;
3562    aEvent->mOverflowDeltaY =
3563        static_cast<double>(overflow.y) / scrollAmountInDevPixels.height;
3564  }
3565 
3566  // If CSS overflow properties caused not to scroll, the overflowDelta* values
3567  // should be same as delta* values since they may be used as gesture event by
3568  // widget.  However, if there is another scrollable element in the ancestor
3569  // along the axis, probably users don't want the operation to cause
3570  // additional action such as moving history.  In such case, overflowDelta
3571  // values should stay zero.
3572  if (scrollFrameWeak.IsAlive()) {
3573    if (aEvent->mDeltaX && overflowStyle.mHorizontal == StyleOverflow::Hidden &&
3574        !ComputeScrollTargetAndMayAdjustWheelEvent(
3575            aScrollContainerFrame, aEvent,
3576            COMPUTE_SCROLLABLE_ANCESTOR_ALONG_X_AXIS_WITH_AUTO_DIR)) {
3577      aEvent->mOverflowDeltaX = aEvent->mDeltaX;
3578    }
3579    if (aEvent->mDeltaY && overflowStyle.mVertical == StyleOverflow::Hidden &&
3580        !ComputeScrollTargetAndMayAdjustWheelEvent(
3581            aScrollContainerFrame, aEvent,
3582            COMPUTE_SCROLLABLE_ANCESTOR_ALONG_Y_AXIS_WITH_AUTO_DIR)) {
3583      aEvent->mOverflowDeltaY = aEvent->mDeltaY;
3584    }
3585  }
3586 
3587  NS_ASSERTION(do { if (!(aEvent->mOverflowDeltaX == 0 || (aEvent->mOverflowDeltaX
 > 0) == (aEvent->mDeltaX > 0))) { NS_DebugBreak(NS_DEBUG_ASSERTION
, "The sign of mOverflowDeltaX is different from the scroll direction"
, "aEvent->mOverflowDeltaX == 0 || (aEvent->mOverflowDeltaX > 0) == (aEvent->mDeltaX > 0)"
, "/var/lib/jenkins/workspace/firefox-scan-build/dom/events/EventStateManager.cpp"
, 3590); MOZ_PretendNoReturn(); } } while (0)
3588      aEvent->mOverflowDeltaX == 0 ||do { if (!(aEvent->mOverflowDeltaX == 0 || (aEvent->mOverflowDeltaX
 > 0) == (aEvent->mDeltaX > 0))) { NS_DebugBreak(NS_DEBUG_ASSERTION
, "The sign of mOverflowDeltaX is different from the scroll direction"
, "aEvent->mOverflowDeltaX == 0 || (aEvent->mOverflowDeltaX > 0) == (aEvent->mDeltaX > 0)"
, "/var/lib/jenkins/workspace/firefox-scan-build/dom/events/EventStateManager.cpp"
, 3590); MOZ_PretendNoReturn(); } } while (0)
3589          (aEvent->mOverflowDeltaX > 0) == (aEvent->mDeltaX > 0),do { if (!(aEvent->mOverflowDeltaX == 0 || (aEvent->mOverflowDeltaX
 > 0) == (aEvent->mDeltaX > 0))) { NS_DebugBreak(NS_DEBUG_ASSERTION
, "The sign of mOverflowDeltaX is different from the scroll direction"
, "aEvent->mOverflowDeltaX == 0 || (aEvent->mOverflowDeltaX > 0) == (aEvent->mDeltaX > 0)"
, "/var/lib/jenkins/workspace/firefox-scan-build/dom/events/EventStateManager.cpp"
, 3590); MOZ_PretendNoReturn(); } } while (0)
3590      "The sign of mOverflowDeltaX is different from the scroll direction")do { if (!(aEvent->mOverflowDeltaX == 0 || (aEvent->mOverflowDeltaX
 > 0) == (aEvent->mDeltaX > 0))) { NS_DebugBreak(NS_DEBUG_ASSERTION
, "The sign of mOverflowDeltaX is different from the scroll direction"
, "aEvent->mOverflowDeltaX == 0 || (aEvent->mOverflowDeltaX > 0) == (aEvent->mDeltaX > 0)"
, "/var/lib/jenkins/workspace/firefox-scan-build/dom/events/EventStateManager.cpp"
, 3590); MOZ_PretendNoReturn(); } } while (0);
3591  NS_ASSERTION(do { if (!(aEvent->mOverflowDeltaY == 0 || (aEvent->mOverflowDeltaY
 > 0) == (aEvent->mDeltaY > 0))) { NS_DebugBreak(NS_DEBUG_ASSERTION
, "The sign of mOverflowDeltaY is different from the scroll direction"
, "aEvent->mOverflowDeltaY == 0 || (aEvent->mOverflowDeltaY > 0) == (aEvent->mDeltaY > 0)"
, "/var/lib/jenkins/workspace/firefox-scan-build/dom/events/EventStateManager.cpp"
, 3594); MOZ_PretendNoReturn(); } } while (0)
3592      aEvent->mOverflowDeltaY == 0 ||do { if (!(aEvent->mOverflowDeltaY == 0 || (aEvent->mOverflowDeltaY
 > 0) == (aEvent->mDeltaY > 0))) { NS_DebugBreak(NS_DEBUG_ASSERTION
, "The sign of mOverflowDeltaY is different from the scroll direction"
, "aEvent->mOverflowDeltaY == 0 || (aEvent->mOverflowDeltaY > 0) == (aEvent->mDeltaY > 0)"
, "/var/lib/jenkins/workspace/firefox-scan-build/dom/events/EventStateManager.cpp"
, 3594); MOZ_PretendNoReturn(); } } while (0)
3593          (aEvent->mOverflowDeltaY > 0) == (aEvent->mDeltaY > 0),do { if (!(aEvent->mOverflowDeltaY == 0 || (aEvent->mOverflowDeltaY
 > 0) == (aEvent->mDeltaY > 0))) { NS_DebugBreak(NS_DEBUG_ASSERTION
, "The sign of mOverflowDeltaY is different from the scroll direction"
, "aEvent->mOverflowDeltaY == 0 || (aEvent->mOverflowDeltaY > 0) == (aEvent->mDeltaY > 0)"
, "/var/lib/jenkins/workspace/firefox-scan-build/dom/events/EventStateManager.cpp"
, 3594); MOZ_PretendNoReturn(); } } while (0)
3594      "The sign of mOverflowDeltaY is different from the scroll direction")do { if (!(aEvent->mOverflowDeltaY == 0 || (aEvent->mOverflowDeltaY
 > 0) == (aEvent->mDeltaY > 0))) { NS_DebugBreak(NS_DEBUG_ASSERTION
, "The sign of mOverflowDeltaY is different from the scroll direction"
, "aEvent->mOverflowDeltaY == 0 || (aEvent->mOverflowDeltaY > 0) == (aEvent->mDeltaY > 0)"
, "/var/lib/jenkins/workspace/firefox-scan-build/dom/events/EventStateManager.cpp"
, 3594); MOZ_PretendNoReturn(); } } while (0);
3595 
3596  WheelPrefs::GetInstance()->CancelApplyingUserPrefsFromOverflowDelta(aEvent);
3597}
3598 
3599void EventStateManager::DecideGestureEvent(WidgetGestureNotifyEvent* aEvent,
3600                                           nsIFrame* targetFrame) {
3601  NS_ASSERTION(aEvent->mMessage == eGestureNotify,do { if (!(aEvent->mMessage == eGestureNotify)) { NS_DebugBreak
(NS_DEBUG_ASSERTION, "DecideGestureEvent called with a non-gesture event"
, "aEvent->mMessage == eGestureNotify", "/var/lib/jenkins/workspace/firefox-scan-build/dom/events/EventStateManager.cpp"
, 3602); MOZ_PretendNoReturn(); } } while (0)
3602               "DecideGestureEvent called with a non-gesture event")do { if (!(aEvent->mMessage == eGestureNotify)) { NS_DebugBreak
(NS_DEBUG_ASSERTION, "DecideGestureEvent called with a non-gesture event"
, "aEvent->mMessage == eGestureNotify", "/var/lib/jenkins/workspace/firefox-scan-build/dom/events/EventStateManager.cpp"
, 3602); MOZ_PretendNoReturn(); } } while (0);
3603 
3604  /* Check the ancestor tree to decide if any frame is willing* to receive
3605   * a MozPixelScroll event. If that's the case, the current touch gesture
3606   * will be used as a pan gesture; otherwise it will be a regular
3607   * mousedown/mousemove/click event.
3608   *
3609   * *willing: determine if it makes sense to pan the element using scroll
3610   * events:
3611   *  - For web content: if there are any visible scrollbars on the touch point
3612   *  - For XUL: if it's an scrollable element that can currently scroll in some
3613   *    direction.
3614   *
3615   * Note: we'll have to one-off various cases to ensure a good usable behavior
3616   */
3617  WidgetGestureNotifyEvent::PanDirection panDirection =
3618      WidgetGestureNotifyEvent::ePanNone;
3619  bool displayPanFeedback = false;
3620  for (nsIFrame* current = targetFrame; current;
3621       current = nsLayoutUtils::GetCrossDocParentFrame(current)) {
3622    // e10s - mark remote content as pannable. This is a work around since
3623    // we don't have access to remote frame scroll info here. Apz data may
3624    // assist is solving this.
3625    if (current && IsTopLevelRemoteTarget(current->GetContent())) {
3626      panDirection = WidgetGestureNotifyEvent::ePanBoth;
3627      // We don't know when we reach bounds, so just disable feedback for now.
3628      displayPanFeedback = false;
3629      break;
3630    }
3631 
3632    LayoutFrameType currentFrameType = current->Type();
3633 
3634    // Scrollbars should always be draggable
3635    if (currentFrameType == LayoutFrameType::Scrollbar) {
3636      panDirection = WidgetGestureNotifyEvent::ePanNone;
3637      break;
3638    }
3639 
3640    // Special check for trees
3641    if (nsTreeBodyFrame* treeFrame = do_QueryFrame(current)) {
3642      if (treeFrame->GetHorizontalOverflow()) {
3643        panDirection = WidgetGestureNotifyEvent::ePanHorizontal;
3644      }
3645      if (treeFrame->GetVerticalOverflow()) {
3646        panDirection = WidgetGestureNotifyEvent::ePanVertical;
3647      }
3648      break;
3649    }
3650 
3651    if (ScrollContainerFrame* scrollContainerFrame = do_QueryFrame(current)) {
3652      layers::ScrollDirections scrollbarVisibility =
3653          scrollContainerFrame->GetScrollbarVisibility();
3654 
3655      // Check if we have visible scrollbars
3656      if (scrollbarVisibility.contains(layers::ScrollDirection::eVertical)) {
3657        panDirection = WidgetGestureNotifyEvent::ePanVertical;
3658        displayPanFeedback = true;
3659        break;
3660      }
3661 
3662      if (scrollbarVisibility.contains(layers::ScrollDirection::eHorizontal)) {
3663        panDirection = WidgetGestureNotifyEvent::ePanHorizontal;
3664        displayPanFeedback = true;
3665      }
3666    }
3667  }  // ancestor chain
3668  aEvent->mDisplayPanFeedback = displayPanFeedback;
3669  aEvent->mPanDirection = panDirection;
3670}
3671 
3672#ifdef XP_MACOSX
3673static nsINode* GetCrossDocParentNode(nsINode* aChild) {
3674  MOZ_ASSERT(aChild, "The child is null!")do { static_assert( mozilla::detail::AssertionConditionType<
decltype(aChild)>::isValid, "invalid assertion condition")
; if ((__builtin_expect(!!(!(!!(aChild))), 0))) { do { } while
 (false); MOZ_ReportAssertionFailure("aChild" " (" "The child is null!"
 ")", "/var/lib/jenkins/workspace/firefox-scan-build/dom/events/EventStateManager.cpp"
, 3674); AnnotateMozCrashReason("MOZ_ASSERT" "(" "aChild" ") ("
 "The child is null!" ")"); do { *((volatile int*)__null) = 3674
; __attribute__((nomerge)) ::abort(); } while (false); } } while
 (false);
3675  MOZ_ASSERT(XRE_IsParentProcess())do { static_assert( mozilla::detail::AssertionConditionType<
decltype(XRE_IsParentProcess())>::isValid, "invalid assertion condition"
); if ((__builtin_expect(!!(!(!!(XRE_IsParentProcess()))), 0)
)) { do { } while (false); MOZ_ReportAssertionFailure("XRE_IsParentProcess()"
, "/var/lib/jenkins/workspace/firefox-scan-build/dom/events/EventStateManager.cpp"
, 3675); AnnotateMozCrashReason("MOZ_ASSERT" "(" "XRE_IsParentProcess()"
 ")"); do { *((volatile int*)__null) = 3675; __attribute__((nomerge
)) ::abort(); } while (false); } } while (false);
3676 
3677  nsINode* parent = aChild->GetParentNode();
3678  if (parent && parent->IsContent() && aChild->IsContent()) {
3679    parent = aChild->AsContent()->GetFlattenedTreeParent();
3680  }
3681 
3682  if (parent || !aChild->IsDocument()) {
3683    return parent;
3684  }
3685 
3686  return aChild->AsDocument()->GetEmbedderElement();
3687}
3688 
3689static bool NodeAllowsClickThrough(nsINode* aNode) {
3690  while (aNode) {
3691    if (aNode->IsAnyOfXULElements(nsGkAtoms::browser, nsGkAtoms::tree)) {
3692      return false;
3693    }
3694    if (aNode->IsAnyOfXULElements(nsGkAtoms::scrollbar, nsGkAtoms::resizer)) {
3695      return true;
3696    }
3697    aNode = GetCrossDocParentNode(aNode);
3698  }
3699  return true;
3700}
3701#endif
3702 
3703void EventStateManager::PostHandleKeyboardEvent(
3704    WidgetKeyboardEvent* aKeyboardEvent, nsIFrame* aTargetFrame,
3705    nsEventStatus& aStatus) {
3706  if (aStatus == nsEventStatus_eConsumeNoDefault) {
3707    return;
3708  }
3709 
3710  RefPtr<nsPresContext> presContext = mPresContext;
3711 
3712  if (!aKeyboardEvent->HasBeenPostedToRemoteProcess()) {
3713    if (aKeyboardEvent->IsWaitingReplyFromRemoteProcess()) {
3714      RefPtr<BrowserParent> remote =
3715          aTargetFrame ? BrowserParent::GetFrom(aTargetFrame->GetContent())
3716                       : nullptr;
3717      if (remote) {
3718        // remote is null-checked above in order to let pre-existing event
3719        // targeting code's chrome vs. content decision override in case of
3720        // disagreement in order not to disrupt non-Fission e10s mode in case
3721        // there are still bugs in the Fission-mode code. That is, if remote
3722        // is nullptr, the pre-existing event targeting code has deemed this
3723        // event to belong to chrome rather than content.
3724        BrowserParent* preciseRemote = BrowserParent::GetFocused();
3725        if (preciseRemote) {
3726          remote = preciseRemote;
3727        }
3728        // else there was a race between layout and focus tracking
3729      }
3730      if (remote && !remote->IsReadyToHandleInputEvents()) {
3731        // We need to dispatch the event to the browser element again if we were
3732        // waiting for the key reply but the event wasn't sent to the content
3733        // process due to the remote browser wasn't ready.
3734        WidgetKeyboardEvent keyEvent(*aKeyboardEvent);
3735        aKeyboardEvent->MarkAsHandledInRemoteProcess();
3736        RefPtr<Element> ownerElement = remote->GetOwnerElement();
3737        EventDispatcher::Dispatch(ownerElement, presContext, &keyEvent);
3738        if (keyEvent.DefaultPrevented()) {
3739          aKeyboardEvent->PreventDefault(!keyEvent.DefaultPreventedByContent());
3740          aStatus = nsEventStatus_eConsumeNoDefault;
3741          return;
3742        }
3743      }
3744    }
3745    // The widget expects a reply for every keyboard event. If the event wasn't
3746    // dispatched to a content process (non-e10s or no content process
3747    // running), we need to short-circuit here. Otherwise, we need to wait for
3748    // the content process to handle the event.
3749    if (aKeyboardEvent->mWidget) {
3750      aKeyboardEvent->mWidget->PostHandleKeyEvent(aKeyboardEvent);
3751    }
3752    if (aKeyboardEvent->DefaultPrevented()) {
3753      aStatus = nsEventStatus_eConsumeNoDefault;
3754      return;
3755    }
3756  }
3757 
3758  // XXX Currently, our automated tests don't support mKeyNameIndex.
3759  //     Therefore, we still need to handle this with keyCode.
3760  switch (aKeyboardEvent->mKeyCode) {
3761    case NS_VK_TAB:
3762    case NS_VK_F6:
3763      // This is to prevent keyboard scrolling while alt modifier in use.
3764      if (!aKeyboardEvent->IsAlt()) {
3765        aStatus = nsEventStatus_eConsumeNoDefault;
3766 
3767        // Handling the tab event after it was sent to content is bad,
3768        // because to the FocusManager the remote-browser looks like one
3769        // element, so we would just move the focus to the next element
3770        // in chrome, instead of handling it in content.
3771        if (aKeyboardEvent->HasBeenPostedToRemoteProcess()) {
3772          break;
3773        }
3774 
3775        EnsureDocument(presContext);
3776        nsFocusManager* fm = nsFocusManager::GetFocusManager();
3777        if (fm && mDocument) {
3778          // Shift focus forward or back depending on shift key
3779          bool isDocMove = aKeyboardEvent->IsControl() ||
3780                           aKeyboardEvent->mKeyCode == NS_VK_F6;
3781          uint32_t dir =
3782              aKeyboardEvent->IsShift()
3783                  ? (isDocMove ? static_cast<uint32_t>(
3784                                     nsIFocusManager::MOVEFOCUS_BACKWARDDOC)
3785                               : static_cast<uint32_t>(
3786                                     nsIFocusManager::MOVEFOCUS_BACKWARD))
3787                  : (isDocMove ? static_cast<uint32_t>(
3788                                     nsIFocusManager::MOVEFOCUS_FORWARDDOC)
3789                               : static_cast<uint32_t>(
3790                                     nsIFocusManager::MOVEFOCUS_FORWARD));
3791          RefPtr<Element> result;
3792          fm->MoveFocus(mDocument->GetWindow(), nullptr, dir,
3793                        nsIFocusManager::FLAG_BYKEY, getter_AddRefs(result));
3794        }
3795      }
3796      return;
3797    case 0:
3798      // We handle keys with no specific keycode value below.
3799      break;
3800    default:
3801      return;
3802  }
3803 
3804  switch (aKeyboardEvent->mKeyNameIndex) {
3805    case KEY_NAME_INDEX_ZoomIn:
3806    case KEY_NAME_INDEX_ZoomOut:
3807      ChangeZoom(aKeyboardEvent->mKeyNameIndex == KEY_NAME_INDEX_ZoomIn);
3808      aStatus = nsEventStatus_eConsumeNoDefault;
3809      break;
3810    default:
3811      break;
3812  }
3813}
3814 
3815static bool NeedsActiveContentChange(const WidgetMouseEvent* aMouseEvent) {
3816  // If the mouse event is a synthesized mouse event due to a touch, do
3817  // not set/clear the activation state. Element activation is handled by APZ.
3818  return !aMouseEvent ||
3819         aMouseEvent->mInputSource != MouseEvent_Binding::MOZ_SOURCE_TOUCH;
3820}
3821 
3822nsresult EventStateManager::PostHandleEvent(nsPresContext* aPresContext,
3823                                            WidgetEvent* aEvent,
3824                                            nsIFrame* aTargetFrame,
3825                                            nsEventStatus* aStatus,
3826                                            nsIContent* aOverrideClickTarget) {
3827  AUTO_PROFILER_LABEL("EventStateManager::PostHandleEvent", DOM)mozilla::AutoProfilerLabel raiiObject3827( "EventStateManager::PostHandleEvent"
, nullptr, JS::ProfilingCategoryPair::DOM);
3828  NS_ENSURE_ARG(aPresContext)do { if ((__builtin_expect(!!(!(aPresContext)), 0))) { NS_DebugBreak
(NS_DEBUG_WARNING, "NS_ENSURE_TRUE(" "aPresContext" ") failed"
, nullptr, "/var/lib/jenkins/workspace/firefox-scan-build/dom/events/EventStateManager.cpp"
, 3828); return NS_ERROR_INVALID_ARG; } } while (false);
3829  NS_ENSURE_ARG_POINTER(aStatus)do { if ((__builtin_expect(!!(!(aStatus)), 0))) { NS_DebugBreak
(NS_DEBUG_WARNING, "NS_ENSURE_TRUE(" "aStatus" ") failed", nullptr
, "/var/lib/jenkins/workspace/firefox-scan-build/dom/events/EventStateManager.cpp"
, 3829); return NS_ERROR_INVALID_POINTER; } } while (false);
3830 
3831  mCurrentTarget = aTargetFrame;
3832  mCurrentTargetContent = nullptr;
3833 
3834  HandleCrossProcessEvent(aEvent, aStatus);
3835  // NOTE: the above call may have destroyed aTargetFrame, please use
3836  // mCurrentTarget henceforth.  This is to avoid using it accidentally:
3837  aTargetFrame = nullptr;
3838 
3839  // Most of the events we handle below require a frame.
3840  // Add special cases here.
3841  if (!mCurrentTarget && aEvent->mMessage != eMouseUp &&
3842      aEvent->mMessage != eMouseDown && aEvent->mMessage != eDragEnter &&
3843      aEvent->mMessage != eDragOver && aEvent->mMessage != ePointerUp &&
3844      aEvent->mMessage != ePointerCancel) {
3845    return NS_OK;
3846  }
3847 
3848  // Keep the prescontext alive, we might need it after event dispatch
3849  RefPtr<nsPresContext> presContext = aPresContext;
3850  nsresult ret = NS_OK;
3851 
3852  switch (aEvent->mMessage) {
3853    case eMouseDown: {
3854      WidgetMouseEvent* mouseEvent = aEvent->AsMouseEvent();
3855      if (mouseEvent->mButton == MouseButton::ePrimary &&
3856          !sNormalLMouseEventInProcess) {
3857        // We got a mouseup event while a mousedown event was being processed.
3858        // Make sure that the capturing content is cleared.
3859        PresShell::ReleaseCapturingContent();
3860        break;
3861      }
3862 
3863      // For remote content, capture the event in the parent process at the
3864      // <xul:browser remote> element. This will ensure that subsequent
3865      // mousemove/mouseup events will continue to be dispatched to this element
3866      // and therefore forwarded to the child.
3867      if (aEvent->HasBeenPostedToRemoteProcess() &&
3868          !PresShell::GetCapturingContent()) {
3869        if (nsIContent* content =
3870                mCurrentTarget ? mCurrentTarget->GetContent() : nullptr) {
3871          PresShell::SetCapturingContent(content, CaptureFlags::None, aEvent);
3872        } else {
3873          PresShell::ReleaseCapturingContent();
3874        }
3875      }
3876 
3877      // If MouseEvent::PreventClickEvent() was called by chrome script,
3878      // we need to forget the clicking content and click count for the
3879      // following eMouseUp event.
3880      if (mouseEvent->mClickEventPrevented) {
3881        switch (mouseEvent->mButton) {
3882          case MouseButton::ePrimary:
3883          case MouseButton::eSecondary:
3884          case MouseButton::eMiddle: {
3885            LastMouseDownInfo& mouseDownInfo =
3886                GetLastMouseDownInfo(mouseEvent->mButton);
3887            mouseDownInfo.mLastMouseDownContent = nullptr;
3888            mouseDownInfo.mClickCount = 0;
3889            mouseDownInfo.mLastMouseDownInputControlType = Nothing();
3890            break;
3891          }
3892 
3893          default:
3894            break;
3895        }
3896      }
3897 
3898      nsCOMPtr<nsIContent> activeContent;
3899      // When content calls PreventDefault on pointerdown, we also call
3900      // PreventDefault on the subsequent mouse events to suppress default
3901      // behaviors. Normally, aStatus should be nsEventStatus_eConsumeNoDefault
3902      // when the event is DefaultPrevented but it's reset to
3903      // nsEventStatus_eIgnore in EventStateManager::PreHandleEvent. So we also
3904      // check if the event is DefaultPrevented.
3905      if (nsEventStatus_eConsumeNoDefault != *aStatus &&
3906          !aEvent->DefaultPrevented()) {
3907        nsCOMPtr<nsIContent> newFocus;
3908        bool suppressBlur = false;
3909        if (mCurrentTarget) {
3910          mCurrentTarget->GetContentForEvent(aEvent, getter_AddRefs(newFocus));
3911          activeContent = mCurrentTarget->GetContent();
3912 
3913          // In some cases, we do not want to even blur the current focused
3914          // element. Those cases are:
3915          // 1. -moz-user-focus CSS property is set to 'ignore';
3916          // 2. XUL control element has the disabled property set to 'true'.
3917          //
3918          // We can't use nsIFrame::IsFocusable() because we want to blur when
3919          // we click on a visibility: none element.
3920          // We can't use nsIContent::IsFocusable() because we want to blur when
3921          // we click on a non-focusable element like a <div>.
3922          // We have to use |aEvent->mTarget| to not make sure we do not check
3923          // an anonymous node of the targeted element.
3924          suppressBlur =
3925              mCurrentTarget->StyleUI()->UserFocus() == StyleUserFocus::Ignore;
3926 
3927          if (!suppressBlur) {
3928            if (Element* element =
3929                    Element::FromEventTargetOrNull(aEvent->mTarget)) {
3930              if (nsCOMPtr<nsIDOMXULControlElement> xulControl =
3931                      element->AsXULControl()) {
3932                bool disabled = false;
3933                xulControl->GetDisabled(&disabled);
3934                suppressBlur = disabled;
3935              }
3936            }
3937          }
3938        }
3939 
3940        // When a root content which isn't editable but has an editable HTML
3941        // <body> element is clicked, we should redirect the focus to the
3942        // the <body> element.  E.g., when an user click bottom of the editor
3943        // where is outside of the <body> element, the <body> should be focused
3944        // and the user can edit immediately after that.
3945        //
3946        // NOTE: The newFocus isn't editable that also means it's not in
3947        // designMode.  In designMode, all contents are not focusable.
3948        if (newFocus && !newFocus->IsEditable()) {
3949          Document* doc = newFocus->GetComposedDoc();
3950          if (doc && newFocus == doc->GetRootElement()) {
3951            nsIContent* bodyContent =
3952                nsLayoutUtils::GetEditableRootContentByContentEditable(doc);
3953            if (bodyContent && bodyContent->GetPrimaryFrame()) {
3954              newFocus = bodyContent;
3955            }
3956          }
3957        }
3958 
3959        // When the mouse is pressed, the default action is to focus the
3960        // target. Look for the nearest enclosing focusable frame.
3961        //
3962        // TODO: Probably this should be moved to Element::PostHandleEvent.
3963        for (; newFocus; newFocus = newFocus->GetFlattenedTreeParent()) {
3964          if (!newFocus->IsElement()) {
3965            continue;
3966          }
3967 
3968          nsIFrame* frame = newFocus->GetPrimaryFrame();
3969          if (!frame) {
3970            continue;
3971          }
3972 
3973          // If the mousedown happened inside a popup, don't try to set focus on
3974          // one of its containing elements
3975          if (frame->IsMenuPopupFrame()) {
3976            newFocus = nullptr;
3977            break;
3978          }
3979 
3980          auto flags = IsFocusableFlags::WithMouse;
3981          if (frame->IsFocusable(flags)) {
3982            break;
3983          }
3984 
3985          if (ShadowRoot* root = newFocus->GetShadowRoot()) {
3986            if (root->DelegatesFocus()) {
3987              if (Element* firstFocusable = root->GetFocusDelegate(flags)) {
3988                newFocus = firstFocusable;
3989                break;
3990              }
3991            }
3992          }
3993        }
3994 
3995        MOZ_ASSERT_IF(newFocus, newFocus->IsElement())do { if (newFocus) { do { static_assert( mozilla::detail::AssertionConditionType
<decltype(newFocus->IsElement())>::isValid, "invalid assertion condition"
); if ((__builtin_expect(!!(!(!!(newFocus->IsElement()))),
 0))) { do { } while (false); MOZ_ReportAssertionFailure("newFocus->IsElement()"
, "/var/lib/jenkins/workspace/firefox-scan-build/dom/events/EventStateManager.cpp"
, 3995); AnnotateMozCrashReason("MOZ_ASSERT" "(" "newFocus->IsElement()"
 ")"); do { *((volatile int*)__null) = 3995; __attribute__((nomerge
)) ::abort(); } while (false); } } while (false); } } while (
false);
3996 
3997        if (RefPtr<nsFocusManager> fm = nsFocusManager::GetFocusManager()) {
3998          // if something was found to focus, focus it. Otherwise, if the
3999          // element that was clicked doesn't have -moz-user-focus: ignore,
4000          // clear the existing focus. For -moz-user-focus: ignore, the focus
4001          // is just left as is.
4002          // Another effect of mouse clicking, handled in Selection, is that
4003          // it should update the caret position to where the mouse was
4004          // clicked. Because the focus is cleared when clicking on a
4005          // non-focusable node, the next press of the tab key will cause
4006          // focus to be shifted from the caret position instead of the root.
4007          if (newFocus) {
4008            // use the mouse flag and the noscroll flag so that the content
4009            // doesn't unexpectedly scroll when clicking an element that is
4010            // only half visible
4011            uint32_t flags =
4012                nsIFocusManager::FLAG_BYMOUSE | nsIFocusManager::FLAG_NOSCROLL;
4013            // If this was a touch-generated event, pass that information:
4014            if (mouseEvent->mInputSource ==
4015                MouseEvent_Binding::MOZ_SOURCE_TOUCH) {
4016              flags |= nsIFocusManager::FLAG_BYTOUCH;
4017            }
4018            fm->SetFocus(MOZ_KnownLive(newFocus->AsElement())(newFocus->AsElement()), flags);
4019          } else if (!suppressBlur) {
4020            // clear the focus within the frame and then set it as the
4021            // focused frame
4022            EnsureDocument(mPresContext);
4023            if (mDocument) {
4024              nsCOMPtr<nsPIDOMWindowOuter> outerWindow = mDocument->GetWindow();
4025#ifdef XP_MACOSX
4026              if (!activeContent || !activeContent->IsXULElement())
4027#endif
4028                fm->ClearFocus(outerWindow);
4029              // Prevent switch frame if we're already not in the foreground tab
4030              // and we're in a content process.
4031              // TODO: If we were inactive frame in this tab, and now in
4032              //       background tab, we shouldn't make the tab foreground, but
4033              //       we should set focus to clicked document in the background
4034              //       tab.  However, nsFocusManager does not have proper method
4035              //       for doing this.  Therefore, we should skip setting focus
4036              //       to clicked document for now.
4037              if (XRE_IsParentProcess() || IsInActiveTab(mDocument)) {
4038                fm->SetFocusedWindow(outerWindow);
4039              }
4040            }
4041          }
4042        }
4043 
4044        // The rest is left button-specific.
4045        if (mouseEvent->mButton != MouseButton::ePrimary) {
4046          break;
4047        }
4048 
4049        // The nearest enclosing element goes into the :active state.  If we're
4050        // not an element (so we're text or something) we need to obtain
4051        // our parent element and put it into :active instead.
4052        if (activeContent && !activeContent->IsElement()) {
4053          if (nsIContent* par = activeContent->GetFlattenedTreeParent()) {
4054            activeContent = par;
4055          }
4056        }
4057      } else {
4058        // if we're here, the event handler returned false, so stop
4059        // any of our own processing of a drag. Workaround for bug 43258.
4060        StopTrackingDragGesture(true);
4061      }
4062      // XXX Why do we always set this is active?  Active window may be changed
4063      //     by a mousedown event listener.
4064      if (NeedsActiveContentChange(mouseEvent)) {
4065        SetActiveManager(this, activeContent);
4066      }
4067    } break;
4068    case ePointerCancel:
4069    case ePointerUp: {
4070      WidgetPointerEvent* pointerEvent = aEvent->AsPointerEvent();
4071      MOZ_ASSERT(pointerEvent)do { static_assert( mozilla::detail::AssertionConditionType<
decltype(pointerEvent)>::isValid, "invalid assertion condition"
); if ((__builtin_expect(!!(!(!!(pointerEvent))), 0))) { do {
 } while (false); MOZ_ReportAssertionFailure("pointerEvent", "/var/lib/jenkins/workspace/firefox-scan-build/dom/events/EventStateManager.cpp"
, 4071); AnnotateMozCrashReason("MOZ_ASSERT" "(" "pointerEvent"
 ")"); do { *((volatile int*)__null) = 4071; __attribute__((nomerge
)) ::abort(); } while (false); } } while (false);
4072      // Implicitly releasing capture for given pointer. ePointerLostCapture
4073      // should be send after ePointerUp or ePointerCancel.
4074      PointerEventHandler::ImplicitlyReleasePointerCapture(pointerEvent);
4075      PointerEventHandler::UpdateActivePointerState(pointerEvent);
4076 
4077      if (
4078          // After pointercancel, pointer becomes invalid so we can remove
4079          // relevant helper from table.
4080          pointerEvent->mMessage == ePointerCancel ||
4081          // pointerup for non-hoverable pointer needs to dispatch pointerout
4082          // and pointerleave events because the pointer is valid only while the
4083          // pointer is "down".
4084          !pointerEvent->InputSourceSupportsHover()) {
4085        GenerateMouseEnterExit(pointerEvent);
4086        mPointersEnterLeaveHelper.Remove(pointerEvent->pointerId);
4087      }
4088 
4089      break;
4090    }
4091    case eMouseUp: {
4092      // We can unconditionally stop capturing because
4093      // we should never be capturing when the mouse button is up
4094      PresShell::ReleaseCapturingContent();
4095 
4096      WidgetMouseEvent* mouseUpEvent = aEvent->AsMouseEvent();
4097      if (NeedsActiveContentChange(mouseUpEvent)) {
4098        ClearGlobalActiveContent(this);
4099      }
4100      if (mouseUpEvent && EventCausesClickEvents(*mouseUpEvent)) {
4101        // Make sure to dispatch the click even if there is no frame for
4102        // the current target element. This is required for Web compatibility.
4103        RefPtr<EventStateManager> esm =
4104            ESMFromContentOrThis(aOverrideClickTarget);
4105        ret =
4106            esm->PostHandleMouseUp(mouseUpEvent, aStatus, aOverrideClickTarget);
4107      }
4108 
4109      if (PresShell* presShell = presContext->GetPresShell()) {
4110        RefPtr<nsFrameSelection> frameSelection = presShell->FrameSelection();
4111        frameSelection->SetDragState(false);
4112      }
4113    } break;
4114    case eWheelOperationEnd: {
4115      MOZ_ASSERT(aEvent->IsTrusted())do { static_assert( mozilla::detail::AssertionConditionType<
decltype(aEvent->IsTrusted())>::isValid, "invalid assertion condition"
); if ((__builtin_expect(!!(!(!!(aEvent->IsTrusted()))), 0
))) { do { } while (false); MOZ_ReportAssertionFailure("aEvent->IsTrusted()"
, "/var/lib/jenkins/workspace/firefox-scan-build/dom/events/EventStateManager.cpp"
, 4115); AnnotateMozCrashReason("MOZ_ASSERT" "(" "aEvent->IsTrusted()"
 ")"); do { *((volatile int*)__null) = 4115; __attribute__((nomerge
)) ::abort(); } while (false); } } while (false);
4116      ScrollbarsForWheel::MayInactivate();
4117      WidgetWheelEvent* wheelEvent = aEvent->AsWheelEvent();
4118      ScrollContainerFrame* scrollTarget =
4119          ComputeScrollTargetAndMayAdjustWheelEvent(
4120              mCurrentTarget, wheelEvent,
4121              COMPUTE_DEFAULT_ACTION_TARGET_WITH_AUTO_DIR);
4122      // If the wheel event was handled by APZ, APZ will perform the scroll
4123      // snap.
4124      if (scrollTarget && !WheelTransaction::HandledByApz()) {
4125        scrollTarget->ScrollSnap();
4126      }
4127    } break;
4128    case eWheel:
4129    case eWheelOperationStart: {
4130      MOZ_ASSERT(aEvent->IsTrusted())do { static_assert( mozilla::detail::AssertionConditionType<
decltype(aEvent->IsTrusted())>::isValid, "invalid assertion condition"
); if ((__builtin_expect(!!(!(!!(aEvent->IsTrusted()))), 0
))) { do { } while (false); MOZ_ReportAssertionFailure("aEvent->IsTrusted()"
, "/var/lib/jenkins/workspace/firefox-scan-build/dom/events/EventStateManager.cpp"
, 4130); AnnotateMozCrashReason("MOZ_ASSERT" "(" "aEvent->IsTrusted()"
 ")"); do { *((volatile int*)__null) = 4130; __attribute__((nomerge
)) ::abort(); } while (false); } } while (false);
4131 
4132      if (*aStatus == nsEventStatus_eConsumeNoDefault) {
4133        ScrollbarsForWheel::Inactivate();
4134        break;
4135      }
4136 
4137      WidgetWheelEvent* wheelEvent = aEvent->AsWheelEvent();
4138      MOZ_ASSERT(wheelEvent)do { static_assert( mozilla::detail::AssertionConditionType<
decltype(wheelEvent)>::isValid, "invalid assertion condition"
); if ((__builtin_expect(!!(!(!!(wheelEvent))), 0))) { do { }
 while (false); MOZ_ReportAssertionFailure("wheelEvent", "/var/lib/jenkins/workspace/firefox-scan-build/dom/events/EventStateManager.cpp"
, 4138); AnnotateMozCrashReason("MOZ_ASSERT" "(" "wheelEvent"
 ")"); do { *((volatile int*)__null) = 4138; __attribute__((nomerge
)) ::abort(); } while (false); } } while (false);
4139 
4140      // When APZ is enabled, the actual scroll animation might be handled by
4141      // the compositor.
4142      WheelPrefs::Action action =
4143          wheelEvent->mFlags.mHandledByAPZ
4144              ? WheelPrefs::ACTION_NONE
4145              : WheelPrefs::GetInstance()->ComputeActionFor(wheelEvent);
4146 
4147      WheelDeltaAdjustmentStrategy strategy =
4148          GetWheelDeltaAdjustmentStrategy(*wheelEvent);
4149      // Adjust the delta values of the wheel event if the current default
4150      // action is to horizontalize scrolling. I.e., deltaY values are set to
4151      // deltaX and deltaY and deltaZ values are set to 0.
4152      // If horizontalized, the delta values will be restored and its overflow
4153      // deltaX will become 0 when the WheelDeltaHorizontalizer instance is
4154      // being destroyed.
4155      WheelDeltaHorizontalizer horizontalizer(*wheelEvent);
4156      if (WheelDeltaAdjustmentStrategy::eHorizontalize == strategy) {
4157        horizontalizer.Horizontalize();
4158      }
4159 
4160      // Since ComputeScrollTargetAndMayAdjustWheelEvent() may adjust the delta
4161      // if the event is auto-dir. So we use |ESMAutoDirWheelDeltaRestorer|
4162      // here.
4163      // An instance of |ESMAutoDirWheelDeltaRestorer| is used to monitor
4164      // auto-dir adjustment which may happen during its lifetime. If the delta
4165      // values is adjusted during its lifetime, the instance will restore the
4166      // adjusted delta when it's being destrcuted.
4167      ESMAutoDirWheelDeltaRestorer restorer(*wheelEvent);
4168      ScrollContainerFrame* scrollTarget =
4169          ComputeScrollTargetAndMayAdjustWheelEvent(
4170              mCurrentTarget, wheelEvent,
4171              COMPUTE_DEFAULT_ACTION_TARGET_WITH_AUTO_DIR);
4172 
4173      switch (action) {
4174        case WheelPrefs::ACTION_SCROLL:
4175        case WheelPrefs::ACTION_HORIZONTALIZED_SCROLL: {
4176          // For scrolling of default action, we should honor the mouse wheel
4177          // transaction.
4178 
4179          ScrollbarsForWheel::PrepareToScrollText(this, mCurrentTarget,
4180                                                  wheelEvent);
4181 
4182          if (aEvent->mMessage != eWheel ||
4183              (!wheelEvent->mDeltaX && !wheelEvent->mDeltaY)) {
4184            break;
4185          }
4186 
4187          ScrollbarsForWheel::SetActiveScrollTarget(scrollTarget);
4188 
4189          ScrollContainerFrame* rootScrollContainerFrame =
4190              !mCurrentTarget
4191                  ? nullptr
4192                  : mCurrentTarget->PresShell()->GetRootScrollContainerFrame();
4193          if (!scrollTarget || scrollTarget == rootScrollContainerFrame) {
4194            wheelEvent->mViewPortIsOverscrolled = true;
4195          }
4196          wheelEvent->mOverflowDeltaX = wheelEvent->mDeltaX;
4197          wheelEvent->mOverflowDeltaY = wheelEvent->mDeltaY;
4198          WheelPrefs::GetInstance()->CancelApplyingUserPrefsFromOverflowDelta(
4199              wheelEvent);
4200          if (scrollTarget) {
4201            DoScrollText(scrollTarget, wheelEvent);
4202          } else {
4203            WheelTransaction::EndTransaction();
4204            ScrollbarsForWheel::Inactivate();
4205          }
4206          break;
4207        }
4208        case WheelPrefs::ACTION_HISTORY: {
4209          // If this event doesn't cause eLegacyMouseLineOrPageScroll event or
4210          // the direction is oblique, don't perform history back/forward.
4211          int32_t intDelta = wheelEvent->GetPreferredIntDelta();
4212          if (!intDelta) {
4213            break;
4214          }
4215          DoScrollHistory(intDelta);
4216          break;
4217        }
4218        case WheelPrefs::ACTION_ZOOM: {
4219          // If this event doesn't cause eLegacyMouseLineOrPageScroll event or
4220          // the direction is oblique, don't perform zoom in/out.
4221          int32_t intDelta = wheelEvent->GetPreferredIntDelta();
4222          if (!intDelta) {
4223            break;
4224          }
4225          DoScrollZoom(mCurrentTarget, intDelta);
4226          break;
4227        }
4228        case WheelPrefs::ACTION_NONE:
4229        default:
4230          bool allDeltaOverflown = false;
4231          if (StaticPrefs::dom_event_wheel_event_groups_enabled() &&
4232              (wheelEvent->mDeltaX != 0.0 || wheelEvent->mDeltaY != 0.0)) {
4233            if (scrollTarget) {
4234              WheelTransaction::WillHandleDefaultAction(
4235                  wheelEvent, scrollTarget, mCurrentTarget);
4236            } else {
4237              WheelTransaction::EndTransaction();
4238            }
4239          }
4240          if (wheelEvent->mFlags.mHandledByAPZ) {
4241            if (wheelEvent->mCanTriggerSwipe) {
4242              // For events that can trigger swipes, APZ needs to know whether
4243              // scrolling is possible in the requested direction. It does this
4244              // by looking at the scroll overflow values on mCanTriggerSwipe
4245              // events after they have been processed.
4246              allDeltaOverflown = !ComputeScrollTarget(
4247                  mCurrentTarget, wheelEvent, COMPUTE_DEFAULT_ACTION_TARGET);
4248            }
4249          } else {
4250            // The event was processed neither by APZ nor by us, so all of the
4251            // delta values must be overflown delta values.
4252            allDeltaOverflown = true;
4253          }
4254 
4255          if (!allDeltaOverflown) {
4256            break;
4257          }
4258          wheelEvent->mOverflowDeltaX = wheelEvent->mDeltaX;
4259          wheelEvent->mOverflowDeltaY = wheelEvent->mDeltaY;
4260          WheelPrefs::GetInstance()->CancelApplyingUserPrefsFromOverflowDelta(
4261              wheelEvent);
4262          wheelEvent->mViewPortIsOverscrolled = true;
4263          break;
4264      }
4265      *aStatus = nsEventStatus_eConsumeNoDefault;
4266    } break;
4267 
4268    case eGestureNotify: {
4269      if (nsEventStatus_eConsumeNoDefault != *aStatus) {
4270        DecideGestureEvent(aEvent->AsGestureNotifyEvent(), mCurrentTarget);
4271      }
4272    } break;
4273 
4274    case eDragEnter:
4275    case eDragOver: {
4276      NS_ASSERTION(aEvent->mClass == eDragEventClass, "Expected a drag event")do { if (!(aEvent->mClass == eDragEventClass)) { NS_DebugBreak
(NS_DEBUG_ASSERTION, "Expected a drag event", "aEvent->mClass == eDragEventClass"
, "/var/lib/jenkins/workspace/firefox-scan-build/dom/events/EventStateManager.cpp"
, 4276); MOZ_PretendNoReturn(); } } while (0);
4277 
4278      // Check if the drag is occurring inside a scrollable area. If so, scroll
4279      // the area when the mouse is near the edges.
4280      if (mCurrentTarget && aEvent->mMessage == eDragOver) {
4281        nsIFrame* checkFrame = mCurrentTarget;
4282        while (checkFrame) {
4283          ScrollContainerFrame* scrollFrame = do_QueryFrame(checkFrame);
4284          // Break out so only the innermost scrollframe is scrolled.
4285          if (scrollFrame && scrollFrame->DragScroll(aEvent)) {
4286            break;
4287          }
4288          checkFrame = checkFrame->GetParent();
4289        }
4290      }
4291 
4292      nsCOMPtr<nsIDragSession> dragSession =
4293          nsContentUtils::GetDragSession(mPresContext);
4294      if (!dragSession) break;
4295 
4296      // Reset the flag.
4297      dragSession->SetOnlyChromeDrop(false);
4298      if (mPresContext) {
4299        EnsureDocument(mPresContext);
4300      }
4301      bool isChromeDoc = nsContentUtils::IsChromeDoc(mDocument);
4302 
4303      // the initial dataTransfer is the one from the dragstart event that
4304      // was set on the dragSession when the drag began.
4305      RefPtr<DataTransfer> dataTransfer;
4306      RefPtr<DataTransfer> initialDataTransfer = dragSession->GetDataTransfer();
4307 
4308      WidgetDragEvent* dragEvent = aEvent->AsDragEvent();
4309 
4310      // collect any changes to moz cursor settings stored in the event's
4311      // data transfer.
4312      UpdateDragDataTransfer(dragEvent);
4313 
4314      // cancelling a dragenter or dragover event means that a drop should be
4315      // allowed, so update the dropEffect and the canDrop state to indicate
4316      // that a drag is allowed. If the event isn't cancelled, a drop won't be
4317      // allowed. Essentially, to allow a drop somewhere, specify the effects
4318      // using the effectAllowed and dropEffect properties in a dragenter or
4319      // dragover event and cancel the event. To not allow a drop somewhere,
4320      // don't cancel the event or set the effectAllowed or dropEffect to
4321      // "none". This way, if the event is just ignored, no drop will be
4322      // allowed.
4323      uint32_t dropEffect = nsIDragService::DRAGDROP_ACTION_NONE;
4324      uint32_t action = nsIDragService::DRAGDROP_ACTION_NONE;
4325      if (nsEventStatus_eConsumeNoDefault == *aStatus) {
4326        // If the event has initialized its mDataTransfer, use it.
4327        // Or the event has not been initialized its mDataTransfer, but
4328        // it's set before dispatch because of synthesized, but without
4329        // testing session (e.g., emulating drag from another app), use it
4330        // coming from outside.
4331        // XXX Perhaps, for the latter case, we need new API because we don't
4332        //     have a chance to initialize allowed effects of the session.
4333        if (dragEvent->mDataTransfer) {
4334          // get the dataTransfer and the dropEffect that was set on it
4335          dataTransfer = dragEvent->mDataTransfer;
4336          dropEffect = dataTransfer->DropEffectInt();
4337        } else {
4338          // if dragEvent->mDataTransfer is null, it means that no attempt was
4339          // made to access the dataTransfer during the event, yet the event
4340          // was cancelled. Instead, use the initial data transfer available
4341          // from the drag session. The drop effect would not have been
4342          // initialized (which is done in DragEvent::GetDataTransfer),
4343          // so set it from the drag action. We'll still want to filter it
4344          // based on the effectAllowed below.
4345          dataTransfer = initialDataTransfer;
4346 
4347          dragSession->GetDragAction(&action);
4348 
4349          // filter the drop effect based on the action. Use UNINITIALIZED as
4350          // any effect is allowed.
4351          dropEffect = nsContentUtils::FilterDropEffect(
4352              action, nsIDragService::DRAGDROP_ACTION_UNINITIALIZED);
4353        }
4354 
4355        // At this point, if the dataTransfer is null, it means that the
4356        // drag was originally started by directly calling the drag service.
4357        // Just assume that all effects are allowed.
4358        uint32_t effectAllowed = nsIDragService::DRAGDROP_ACTION_UNINITIALIZED;
4359        if (dataTransfer) {
4360          effectAllowed = dataTransfer->EffectAllowedInt();
4361        }
4362 
4363        // set the drag action based on the drop effect and effect allowed.
4364        // The drop effect field on the drag transfer object specifies the
4365        // desired current drop effect. However, it cannot be used if the
4366        // effectAllowed state doesn't include that type of action. If the
4367        // dropEffect is "none", then the action will be 'none' so a drop will
4368        // not be allowed.
4369        if (effectAllowed == nsIDragService::DRAGDROP_ACTION_UNINITIALIZED ||
4370            dropEffect & effectAllowed)
4371          action = dropEffect;
4372 
4373        if (action == nsIDragService::DRAGDROP_ACTION_NONE)
4374          dropEffect = nsIDragService::DRAGDROP_ACTION_NONE;
4375 
4376        // inform the drag session that a drop is allowed on this node.
4377        dragSession->SetDragAction(action);
4378        dragSession->SetCanDrop(action != nsIDragService::DRAGDROP_ACTION_NONE);
4379 
4380        // For now, do this only for dragover.
4381        // XXXsmaug dragenter needs some more work.
4382        if (aEvent->mMessage == eDragOver && !isChromeDoc) {
4383          // Someone has called preventDefault(), check whether is was on
4384          // content or chrome.
4385          dragSession->SetOnlyChromeDrop(
4386              !dragEvent->mDefaultPreventedOnContent);
4387        }
4388      } else if (aEvent->mMessage == eDragOver && !isChromeDoc) {
4389        // No one called preventDefault(), so handle drop only in chrome.
4390        dragSession->SetOnlyChromeDrop(true);
4391      }
4392      if (auto* bc = BrowserChild::GetFrom(presContext->GetDocShell())) {
4393        bc->SendUpdateDropEffect(action, dropEffect);
4394      }
4395      if (aEvent->HasBeenPostedToRemoteProcess()) {
4396        dragSession->SetCanDrop(true);
4397      } else if (initialDataTransfer) {
4398        // Now set the drop effect in the initial dataTransfer. This ensures
4399        // that we can get the desired drop effect in the drop event. For events
4400        // dispatched to content, the content process will take care of setting
4401        // this.
4402        initialDataTransfer->SetDropEffectInt(dropEffect);
4403      }
4404    } break;
4405 
4406    case eDrop: {
4407      if (aEvent->mFlags.mIsSynthesizedForTests) {
4408        nsCOMPtr<nsIDragService> dragService =
4409            do_GetService("@mozilla.org/widget/dragservice;1");
4410        nsCOMPtr<nsIDragSession> dragSession =
4411            nsContentUtils::GetDragSession(mPresContext);
4412        if (dragSession && dragService &&
4413            !dragService->GetNeverAllowSessionIsSynthesizedForTests()) {
4414          MOZ_ASSERT(dragSession->IsSynthesizedForTests())do { static_assert( mozilla::detail::AssertionConditionType<
decltype(dragSession->IsSynthesizedForTests())>::isValid
, "invalid assertion condition"); if ((__builtin_expect(!!(!(
!!(dragSession->IsSynthesizedForTests()))), 0))) { do { } while
 (false); MOZ_ReportAssertionFailure("dragSession->IsSynthesizedForTests()"
, "/var/lib/jenkins/workspace/firefox-scan-build/dom/events/EventStateManager.cpp"
, 4414); AnnotateMozCrashReason("MOZ_ASSERT" "(" "dragSession->IsSynthesizedForTests()"
 ")"); do { *((volatile int*)__null) = 4414; __attribute__((nomerge
)) ::abort(); } while (false); } } while (false);
4415          RefPtr<WindowContext> sourceWC;
4416          DebugOnly<nsresult> rvIgnored =
4417              dragSession->GetSourceWindowContext(getter_AddRefs(sourceWC));
4418          NS_WARNING_ASSERTION(do { if (!(((bool)(__builtin_expect(!!(!NS_FAILED_impl(rvIgnored
)), 1))))) { NS_DebugBreak(NS_DEBUG_WARNING, "nsIDragSession::GetSourceDocument() failed, but ignored"
, "NS_SUCCEEDED(rvIgnored)", "/var/lib/jenkins/workspace/firefox-scan-build/dom/events/EventStateManager.cpp"
, 4420); } } while (false)
4419              NS_SUCCEEDED(rvIgnored),do { if (!(((bool)(__builtin_expect(!!(!NS_FAILED_impl(rvIgnored
)), 1))))) { NS_DebugBreak(NS_DEBUG_WARNING, "nsIDragSession::GetSourceDocument() failed, but ignored"
, "NS_SUCCEEDED(rvIgnored)", "/var/lib/jenkins/workspace/firefox-scan-build/dom/events/EventStateManager.cpp"
, 4420); } } while (false)
4420              "nsIDragSession::GetSourceDocument() failed, but ignored")do { if (!(((bool)(__builtin_expect(!!(!NS_FAILED_impl(rvIgnored
)), 1))))) { NS_DebugBreak(NS_DEBUG_WARNING, "nsIDragSession::GetSourceDocument() failed, but ignored"
, "NS_SUCCEEDED(rvIgnored)", "/var/lib/jenkins/workspace/firefox-scan-build/dom/events/EventStateManager.cpp"
, 4420); } } while (false);
4421          // If the drag source hasn't been initialized, i.e., dragstart was
4422          // consumed by the test, the test needs to dispatch "dragend" event
4423          // instead of the drag session.  Therefore, it does not make sense
4424          // to set drag end point in such case (you hit assersion if you do
4425          // it).
4426          if (sourceWC) {
4427            CSSIntPoint dropPointInScreen =
4428                Event::GetScreenCoords(aPresContext, aEvent, aEvent->mRefPoint)
4429                    .extract();
4430            dragSession->SetDragEndPointForTests(dropPointInScreen.x,
4431                                                 dropPointInScreen.y);
4432          }
4433        }
4434      }
4435      sLastDragOverFrame = nullptr;
4436      ClearGlobalActiveContent(this);
4437      break;
4438    }
4439    case eDragExit: {
4440      // make sure to fire the enter and exit_synth events after the
4441      // eDragExit event, otherwise we'll clean up too early
4442      GenerateDragDropEnterExit(presContext, aEvent->AsDragEvent());
4443      if (auto* bc = BrowserChild::GetFrom(presContext->GetDocShell())) {
4444        // SendUpdateDropEffect to prevent nsIDragService from waiting for
4445        // response of forwarded dragexit event.
4446        bc->SendUpdateDropEffect(nsIDragService::DRAGDROP_ACTION_NONE,
4447                                 nsIDragService::DRAGDROP_ACTION_NONE);
4448      }
4449      break;
4450    }
4451    case eKeyUp:
4452      // If space key is released, we need to inactivate the element which was
4453      // activated by preceding space key down.
4454      // XXX Currently, we don't store the reason of activation.  Therefore,
4455      //     this may cancel what is activated by a mousedown, but it must not
4456      //     cause actual problem in web apps in the wild since it must be
4457      //     rare case that users release space key during a mouse click/drag.
4458      if (aEvent->AsKeyboardEvent()->ShouldWorkAsSpaceKey()) {
4459        ClearGlobalActiveContent(this);
4460      }
4461      break;
4462 
4463    case eKeyPress: {
4464      WidgetKeyboardEvent* keyEvent = aEvent->AsKeyboardEvent();
4465      PostHandleKeyboardEvent(keyEvent, mCurrentTarget, *aStatus);
4466    } break;
4467 
4468    case eMouseEnterIntoWidget:
4469      if (mCurrentTarget) {
4470        nsCOMPtr<nsIContent> targetContent;
4471        mCurrentTarget->GetContentForEvent(aEvent,
4472                                           getter_AddRefs(targetContent));
4473        SetContentState(targetContent, ElementState::HOVER);
4474      }
4475      break;
4476 
4477    case eMouseExitFromWidget:
4478      PointerEventHandler::UpdateActivePointerState(aEvent->AsMouseEvent());
4479      break;
4480 
4481#ifdef XP_MACOSX
4482    case eMouseActivate:
4483      if (mCurrentTarget) {
4484        nsCOMPtr<nsIContent> targetContent;
4485        mCurrentTarget->GetContentForEvent(aEvent,
4486                                           getter_AddRefs(targetContent));
4487        if (!NodeAllowsClickThrough(targetContent)) {
4488          *aStatus = nsEventStatus_eConsumeNoDefault;
4489        }
4490      }
4491      break;
4492#endif
4493 
4494    default:
4495      break;
4496  }
4497 
4498  // Reset target frame to null to avoid mistargeting after reentrant event
4499  mCurrentTarget = nullptr;
4500  mCurrentTargetContent = nullptr;
4501 
4502  return ret;
4503}
4504 
4505BrowserParent* EventStateManager::GetCrossProcessTarget() {
4506  return IMEStateManager::GetActiveBrowserParent();
4507}
4508 
4509bool EventStateManager::IsTargetCrossProcess(WidgetGUIEvent* aEvent) {
4510  // Check to see if there is a focused, editable content in chrome,
4511  // in that case, do not forward IME events to content
4512  Element* focusedElement = GetFocusedElement();
4513  if (focusedElement && focusedElement->IsEditable()) {
4514    return false;
4515  }
4516  return IMEStateManager::GetActiveBrowserParent() != nullptr;
4517}
4518 
4519void EventStateManager::NotifyDestroyPresContext(nsPresContext* aPresContext) {
4520  RefPtr<nsPresContext> presContext = aPresContext;
4521  if (presContext) {
4522    IMEStateManager::OnDestroyPresContext(*presContext);
4523  }
4524 
4525  // Bug 70855: Presentation is going away, possibly for a reframe.
4526  // Reset the hover state so that if we're recreating the presentation,
4527  // we won't have the old hover state still set in the new presentation,
4528  // as if the new presentation is resized, a new element may be hovered.
4529  ResetHoverState();
4530 
4531  mMouseEnterLeaveHelper = nullptr;
4532  mPointersEnterLeaveHelper.Clear();
4533  PointerEventHandler::NotifyDestroyPresContext(presContext);
4534}
4535 
4536void EventStateManager::ResetHoverState() {
4537  if (mHoverContent) {
4538    SetContentState(nullptr, ElementState::HOVER);
4539  }
4540}
4541 
4542void EventStateManager::SetPresContext(nsPresContext* aPresContext) {
4543  mPresContext = aPresContext;
4544}
4545 
4546void EventStateManager::ClearFrameRefs(nsIFrame* aFrame) {
4547  if (aFrame && aFrame == mCurrentTarget) {
4548    mCurrentTargetContent = aFrame->GetContent();
4549  }
4550}
4551 
4552struct CursorImage {
4553  gfx::IntPoint mHotspot;
4554  nsCOMPtr<imgIContainer> mContainer;
4555  ImageResolution mResolution;
4556  bool mEarlierCursorLoading = false;
4557};
4558 
4559// Given the event that we're processing, and the computed cursor and hotspot,
4560// determine whether the custom CSS cursor should be blocked (that is, not
4561// honored).
4562//
4563// We will not honor it all of the following are true:
4564//
4565//  * the size of the custom cursor is bigger than layout.cursor.block.max-size.
4566//  * the bounds of the cursor would end up outside of the viewport of the
4567//    top-level content document.
4568//
4569// This is done in order to prevent hijacking the cursor, see bug 1445844 and
4570// co.
4571static bool ShouldBlockCustomCursor(nsPresContext* aPresContext,
4572                                    WidgetEvent* aEvent,
4573                                    const CursorImage& aCursor) {
4574  int32_t width = 0;
4575  int32_t height = 0;
4576  aCursor.mContainer->GetWidth(&width);
4577  aCursor.mContainer->GetHeight(&height);
4578  aCursor.mResolution.ApplyTo(width, height);
4579 
4580  int32_t maxSize = StaticPrefs::layout_cursor_block_max_size();
4581 
4582  if (width <= maxSize && height <= maxSize) {
4583    return false;
4584  }
4585 
4586  auto input = DOMIntersectionObserver::ComputeInput(*aPresContext->Document(),
4587                                                     nullptr, nullptr);
4588 
4589  if (!input.mRootFrame) {
4590    return false;
4591  }
4592 
4593  nsPoint point = nsLayoutUtils::GetEventCoordinatesRelativeTo(
4594      aEvent, RelativeTo{input.mRootFrame});
4595 
4596  // The cursor size won't be affected by our full zoom in the parent process,
4597  // so undo that before checking the rect.
4598  float zoom = aPresContext->GetFullZoom();
4599 
4600  // Also adjust for accessibility cursor scaling factor.
4601  zoom /= LookAndFeel::GetFloat(LookAndFeel::FloatID::CursorScale, 1.0f);
4602 
4603  nsSize size(CSSPixel::ToAppUnits(width / zoom),
4604              CSSPixel::ToAppUnits(height / zoom));
4605  nsPoint hotspot(
4606      CSSPixel::ToAppUnits(ViewAs<CSSPixel>(aCursor.mHotspot.x / zoom)),
4607      CSSPixel::ToAppUnits(ViewAs<CSSPixel>(aCursor.mHotspot.y / zoom)));
4608 
4609  const nsRect cursorRect(point - hotspot, size);
4610  auto output = DOMIntersectionObserver::Intersect(input, cursorRect);
4611  return !output.mIntersectionRect ||
4612         !(*output.mIntersectionRect == cursorRect);
4613}
4614 
4615static gfx::IntPoint ComputeHotspot(imgIContainer* aContainer,
4616                                    const Maybe<gfx::Point>& aHotspot) {
4617  MOZ_ASSERT(aContainer)do { static_assert( mozilla::detail::AssertionConditionType<
decltype(aContainer)>::isValid, "invalid assertion condition"
); if ((__builtin_expect(!!(!(!!(aContainer))), 0))) { do { }
 while (false); MOZ_ReportAssertionFailure("aContainer", "/var/lib/jenkins/workspace/firefox-scan-build/dom/events/EventStateManager.cpp"
, 4617); AnnotateMozCrashReason("MOZ_ASSERT" "(" "aContainer"
 ")"); do { *((volatile int*)__null) = 4617; __attribute__((nomerge
)) ::abort(); } while (false); } } while (false);
4618 
4619  // css3-ui says to use the CSS-specified hotspot if present,
4620  // otherwise use the intrinsic hotspot, otherwise use the top left
4621  // corner.
4622  if (aHotspot) {
4623    int32_t imgWidth, imgHeight;
4624    aContainer->GetWidth(&imgWidth);
4625    aContainer->GetHeight(&imgHeight);
4626    auto hotspot = gfx::IntPoint::Round(*aHotspot);
4627    return {std::max(std::min(hotspot.x.value, imgWidth - 1), 0),
4628            std::max(std::min(hotspot.y.value, imgHeight - 1), 0)};
4629  }
4630 
4631  gfx::IntPoint hotspot;
4632  aContainer->GetHotspotX(&hotspot.x.value);
4633  aContainer->GetHotspotY(&hotspot.y.value);
4634  return hotspot;
4635}
4636 
4637static CursorImage ComputeCustomCursor(nsPresContext* aPresContext,
4638                                       WidgetEvent* aEvent,
4639                                       const nsIFrame& aFrame,
4640                                       const nsIFrame::Cursor& aCursor) {
4641  if (aCursor.mAllowCustomCursor == nsIFrame::AllowCustomCursorImage::No) {
4642    return {};
4643  }
4644  const ComputedStyle& style =
4645      aCursor.mStyle ? *aCursor.mStyle : *aFrame.Style();
4646 
4647  // If we are falling back because any cursor before us is loading, let the
4648  // consumer know.
4649  bool loading = false;
4650  for (const auto& image : style.StyleUI()->Cursor().images.AsSpan()) {
4651    MOZ_ASSERT(image.image.IsImageRequestType(),do { static_assert( mozilla::detail::AssertionConditionType<
decltype(image.image.IsImageRequestType())>::isValid, "invalid assertion condition"
); if ((__builtin_expect(!!(!(!!(image.image.IsImageRequestType
()))), 0))) { do { } while (false); MOZ_ReportAssertionFailure
("image.image.IsImageRequestType()" " (" "Cursor image should only parse url() types"
 ")", "/var/lib/jenkins/workspace/firefox-scan-build/dom/events/EventStateManager.cpp"
, 4652); AnnotateMozCrashReason("MOZ_ASSERT" "(" "image.image.IsImageRequestType()"
 ") (" "Cursor image should only parse url() types" ")"); do {
 *((volatile int*)__null) = 4652; __attribute__((nomerge)) ::
abort(); } while (false); } } while (false)
4652               "Cursor image should only parse url() types")do { static_assert( mozilla::detail::AssertionConditionType<
decltype(image.image.IsImageRequestType())>::isValid, "invalid assertion condition"
); if ((__builtin_expect(!!(!(!!(image.image.IsImageRequestType
()))), 0))) { do { } while (false); MOZ_ReportAssertionFailure
("image.image.IsImageRequestType()" " (" "Cursor image should only parse url() types"
 ")", "/var/lib/jenkins/workspace/firefox-scan-build/dom/events/EventStateManager.cpp"
, 4652); AnnotateMozCrashReason("MOZ_ASSERT" "(" "image.image.IsImageRequestType()"
 ") (" "Cursor image should only parse url() types" ")"); do {
 *((volatile int*)__null) = 4652; __attribute__((nomerge)) ::
abort(); } while (false); } } while (false);
4653    uint32_t status;
4654    imgRequestProxy* req = image.image.GetImageRequest();
4655    if (!req || NS_FAILED(req->GetImageStatus(&status))((bool)(__builtin_expect(!!(NS_FAILED_impl(req->GetImageStatus
(&status))), 0)))) {
4656      continue;
4657    }
4658    if (!(status & imgIRequest::STATUS_LOAD_COMPLETE)) {
4659      loading = true;
4660      continue;
4661    }
4662    if (status & imgIRequest::STATUS_ERROR) {
4663      continue;
4664    }
4665    nsCOMPtr<imgIContainer> container;
4666    req->GetImage(getter_AddRefs(container));
4667    if (!container) {
4668      continue;
4669    }
4670    StyleImageOrientation orientation =
4671        aFrame.StyleVisibility()->UsedImageOrientation(req);
4672    container = nsLayoutUtils::OrientImage(container, orientation);
4673    Maybe<gfx::Point> specifiedHotspot =
4674        image.has_hotspot ? Some(gfx::Point{image.hotspot_x, image.hotspot_y})
4675                          : Nothing();
4676    gfx::IntPoint hotspot = ComputeHotspot(container, specifiedHotspot);
4677    CursorImage result{hotspot, std::move(container),
4678                       image.image.GetResolution(style), loading};
4679    if (ShouldBlockCustomCursor(aPresContext, aEvent, result)) {
4680      continue;
4681    }
4682    // This is the one we want!
4683    return result;
4684  }
4685  return {{}, nullptr, {}, loading};
4686}
4687 
4688void EventStateManager::UpdateCursor(nsPresContext* aPresContext,
4689                                     WidgetMouseEvent* aEvent,
4690                                     nsIFrame* aTargetFrame,
4691                                     nsEventStatus* aStatus) {
4692  if (aTargetFrame && IsRemoteTarget(aTargetFrame->GetContent())) {
4693    return;
4694  }
4695 
4696  auto cursor = StyleCursorKind::Default;
4697  nsCOMPtr<imgIContainer> container;
4698  ImageResolution resolution;
4699  Maybe<gfx::IntPoint> hotspot;
4700 
4701  if (mHidingCursorWhileTyping && aEvent->IsReal()) {
4702    // Any non-synthetic mouse event makes us show the cursor again.
4703    mHidingCursorWhileTyping = false;
4704  }
4705 
4706  if (mHidingCursorWhileTyping) {
4707    cursor = StyleCursorKind::None;
4708  } else if (mLockCursor != kInvalidCursorKind) {
4709    // If cursor is locked just use the locked one
4710    cursor = mLockCursor;
4711  } else if (aTargetFrame) {
4712    // If not locked, look for correct cursor
4713    nsPoint pt = nsLayoutUtils::GetEventCoordinatesRelativeTo(
4714        aEvent, RelativeTo{aTargetFrame});
4715    const nsIFrame::Cursor framecursor = aTargetFrame->GetCursor(pt);
4716    const CursorImage customCursor =
4717        ComputeCustomCursor(aPresContext, aEvent, *aTargetFrame, framecursor);
4718 
4719    // If the current cursor is from the same frame, and it is now
4720    // loading some new image for the cursor, we should wait for a
4721    // while rather than taking its fallback cursor directly.
4722    if (customCursor.mEarlierCursorLoading &&
4723        gLastCursorSourceFrame == aTargetFrame &&
4724        TimeStamp::NowLoRes() - gLastCursorUpdateTime <
4725            TimeDuration::FromMilliseconds(kCursorLoadingTimeout)) {
4726      return;
4727    }
4728    cursor = framecursor.mCursor;
4729    container = std::move(customCursor.mContainer);
4730    resolution = customCursor.mResolution;
4731    hotspot = Some(customCursor.mHotspot);
4732  }
4733 
4734  if (aTargetFrame) {
4735    if (cursor == StyleCursorKind::Pointer && IsSelectingLink(aTargetFrame)) {
4736      cursor = aTargetFrame->GetWritingMode().IsVertical()
4737                   ? StyleCursorKind::VerticalText
4738                   : StyleCursorKind::Text;
4739    }
4740    SetCursor(cursor, container, resolution, hotspot,
4741              aTargetFrame->GetNearestWidget(), false);
4742    gLastCursorSourceFrame = aTargetFrame;
4743    gLastCursorUpdateTime = TimeStamp::NowLoRes();
4744  }
4745 
4746  if (mLockCursor != kInvalidCursorKind || StyleCursorKind::Auto != cursor) {
4747    *aStatus = nsEventStatus_eConsumeDoDefault;
4748  }
4749}
4750 
4751void EventStateManager::ClearCachedWidgetCursor(nsIFrame* aTargetFrame) {
4752  if (!aTargetFrame) {
4753    return;
4754  }
4755  nsIWidget* aWidget = aTargetFrame->GetNearestWidget();
4756  if (!aWidget) {
4757    return;
4758  }
4759  aWidget->ClearCachedCursor();
4760}
4761 
4762void EventStateManager::StartHidingCursorWhileTyping(nsIWidget* aWidget) {
4763  if (mHidingCursorWhileTyping || sCursorSettingManager != this) {
4764    return;
4765  }
4766  mHidingCursorWhileTyping = true;
4767  SetCursor(StyleCursorKind::None, nullptr, {}, {}, aWidget, false);
4768}
4769 
4770nsresult EventStateManager::SetCursor(StyleCursorKind aCursor,
4771                                      imgIContainer* aContainer,
4772                                      const ImageResolution& aResolution,
4773                                      const Maybe<gfx::IntPoint>& aHotspot,
4774                                      nsIWidget* aWidget, bool aLockCursor) {
4775  EnsureDocument(mPresContext);
4776  NS_ENSURE_TRUE(mDocument, NS_ERROR_FAILURE)do { if ((__builtin_expect(!!(!(mDocument)), 0))) { NS_DebugBreak
(NS_DEBUG_WARNING, "NS_ENSURE_TRUE(" "mDocument" ") failed", nullptr
, "/var/lib/jenkins/workspace/firefox-scan-build/dom/events/EventStateManager.cpp"
, 4776); return NS_ERROR_FAILURE; } } while (false);
4777  sCursorSettingManager = this;
4778 
4779  NS_ENSURE_TRUE(aWidget, NS_ERROR_FAILURE)do { if ((__builtin_expect(!!(!(aWidget)), 0))) { NS_DebugBreak
(NS_DEBUG_WARNING, "NS_ENSURE_TRUE(" "aWidget" ") failed", nullptr
, "/var/lib/jenkins/workspace/firefox-scan-build/dom/events/EventStateManager.cpp"
, 4779); return NS_ERROR_FAILURE; } } while (false);
4780  if (aLockCursor) {
4781    if (StyleCursorKind::Auto != aCursor) {
4782      mLockCursor = aCursor;
4783    } else {
4784      // If cursor style is set to auto we unlock the cursor again.
4785      mLockCursor = kInvalidCursorKind;
4786    }
4787  }
4788  nsCursor c;
4789  switch (aCursor) {
4790    case StyleCursorKind::Auto:
4791    case StyleCursorKind::Default:
4792      c = eCursor_standard;
4793      break;
4794    case StyleCursorKind::Pointer:
4795      c = eCursor_hyperlink;
4796      break;
4797    case StyleCursorKind::Crosshair:
4798      c = eCursor_crosshair;
4799      break;
4800    case StyleCursorKind::Move:
4801      c = eCursor_move;
4802      break;
4803    case StyleCursorKind::Text:
4804      c = eCursor_select;
4805      break;
4806    case StyleCursorKind::Wait:
4807      c = eCursor_wait;
4808      break;
4809    case StyleCursorKind::Help:
4810      c = eCursor_help;
4811      break;
4812    case StyleCursorKind::NResize:
4813      c = eCursor_n_resize;
4814      break;
4815    case StyleCursorKind::SResize:
4816      c = eCursor_s_resize;
4817      break;
4818    case StyleCursorKind::WResize:
4819      c = eCursor_w_resize;
4820      break;
4821    case StyleCursorKind::EResize:
4822      c = eCursor_e_resize;
4823      break;
4824    case StyleCursorKind::NwResize:
4825      c = eCursor_nw_resize;
4826      break;
4827    case StyleCursorKind::SeResize:
4828      c = eCursor_se_resize;
4829      break;
4830    case StyleCursorKind::NeResize:
4831      c = eCursor_ne_resize;
4832      break;
4833    case StyleCursorKind::SwResize:
4834      c = eCursor_sw_resize;
4835      break;
4836    case StyleCursorKind::Copy:  // CSS3
4837      c = eCursor_copy;
4838      break;
4839    case StyleCursorKind::Alias:
4840      c = eCursor_alias;
4841      break;
4842    case StyleCursorKind::ContextMenu:
4843      c = eCursor_context_menu;
4844      break;
4845    case StyleCursorKind::Cell:
4846      c = eCursor_cell;
4847      break;
4848    case StyleCursorKind::Grab:
4849      c = eCursor_grab;
4850      break;
4851    case StyleCursorKind::Grabbing:
4852      c = eCursor_grabbing;
4853      break;
4854    case StyleCursorKind::Progress:
4855      c = eCursor_spinning;
4856      break;
4857    case StyleCursorKind::ZoomIn:
4858      c = eCursor_zoom_in;
4859      break;
4860    case StyleCursorKind::ZoomOut:
4861      c = eCursor_zoom_out;
4862      break;
4863    case StyleCursorKind::NotAllowed:
4864      c = eCursor_not_allowed;
4865      break;
4866    case StyleCursorKind::ColResize:
4867      c = eCursor_col_resize;
4868      break;
4869    case StyleCursorKind::RowResize:
4870      c = eCursor_row_resize;
4871      break;
4872    case StyleCursorKind::NoDrop:
4873      c = eCursor_no_drop;
4874      break;
4875    case StyleCursorKind::VerticalText:
4876      c = eCursor_vertical_text;
4877      break;
4878    case StyleCursorKind::AllScroll:
4879      c = eCursor_all_scroll;
4880      break;
4881    case StyleCursorKind::NeswResize:
4882      c = eCursor_nesw_resize;
4883      break;
4884    case StyleCursorKind::NwseResize:
4885      c = eCursor_nwse_resize;
4886      break;
4887    case StyleCursorKind::NsResize:
4888      c = eCursor_ns_resize;
4889      break;
4890    case StyleCursorKind::EwResize:
4891      c = eCursor_ew_resize;
4892      break;
4893    case StyleCursorKind::None:
4894      c = eCursor_none;
4895      break;
4896    default:
4897      MOZ_ASSERT_UNREACHABLE("Unknown cursor kind")do { static_assert( mozilla::detail::AssertionConditionType<
decltype(false)>::isValid, "invalid assertion condition");
 if ((__builtin_expect(!!(!(!!(false))), 0))) { do { } while (
false); MOZ_ReportAssertionFailure("false" " (" "MOZ_ASSERT_UNREACHABLE: "
 "Unknown cursor kind" ")", "/var/lib/jenkins/workspace/firefox-scan-build/dom/events/EventStateManager.cpp"
, 4897); AnnotateMozCrashReason("MOZ_ASSERT" "(" "false" ") ("
 "MOZ_ASSERT_UNREACHABLE: " "Unknown cursor kind" ")"); do { *
((volatile int*)__null) = 4897; __attribute__((nomerge)) ::abort
(); } while (false); } } while (false);
4898      c = eCursor_standard;
4899      break;
4900  }
4901 
4902  uint32_t x = aHotspot ? aHotspot->x.value : 0;
4903  uint32_t y = aHotspot ? aHotspot->y.value : 0;
4904  aWidget->SetCursor(nsIWidget::Cursor{c, aContainer, x, y, aResolution});
4905  return NS_OK;
4906}
4907 
4908bool EventStateManager::CursorSettingManagerHasLockedCursor() {
4909  return sCursorSettingManager &&
4910         sCursorSettingManager->mLockCursor != kInvalidCursorKind;
4911}
4912 
4913class MOZ_STACK_CLASS ESMEventCB : public EventDispatchingCallback {
4914 public:
4915  explicit ESMEventCB(nsIContent* aTarget) : mTarget(aTarget) {}
4916 
4917  MOZ_CAN_RUN_SCRIPT
4918  void HandleEvent(EventChainPostVisitor& aVisitor) override {
4919    if (aVisitor.mPresContext) {
4920      nsIFrame* frame = aVisitor.mPresContext->GetPrimaryFrameFor(mTarget);
4921      if (frame) {
4922        frame->HandleEvent(aVisitor.mPresContext, aVisitor.mEvent->AsGUIEvent(),
4923                           &aVisitor.mEventStatus);
4924      }
4925    }
4926  }
4927 
4928  nsCOMPtr<nsIContent> mTarget;
4929};
4930 
4931static UniquePtr<WidgetMouseEvent> CreateMouseOrPointerWidgetEvent(
4932    WidgetMouseEvent* aMouseEvent, EventMessage aMessage,
4933    EventTarget* aRelatedTarget) {
4934  // This method does not support creating a mouse/pointer button change event
4935  // because of no data about the changing state.
4936  MOZ_ASSERT(aMessage != eMouseDown)do { static_assert( mozilla::detail::AssertionConditionType<
decltype(aMessage != eMouseDown)>::isValid, "invalid assertion condition"
); if ((__builtin_expect(!!(!(!!(aMessage != eMouseDown))), 0
))) { do { } while (false); MOZ_ReportAssertionFailure("aMessage != eMouseDown"
, "/var/lib/jenkins/workspace/firefox-scan-build/dom/events/EventStateManager.cpp"
, 4936); AnnotateMozCrashReason("MOZ_ASSERT" "(" "aMessage != eMouseDown"
 ")"); do { *((volatile int*)__null) = 4936; __attribute__((nomerge
)) ::abort(); } while (false); } } while (false);
4937  MOZ_ASSERT(aMessage != eMouseUp)do { static_assert( mozilla::detail::AssertionConditionType<
decltype(aMessage != eMouseUp)>::isValid, "invalid assertion condition"
); if ((__builtin_expect(!!(!(!!(aMessage != eMouseUp))), 0))
) { do { } while (false); MOZ_ReportAssertionFailure("aMessage != eMouseUp"
, "/var/lib/jenkins/workspace/firefox-scan-build/dom/events/EventStateManager.cpp"
, 4937); AnnotateMozCrashReason("MOZ_ASSERT" "(" "aMessage != eMouseUp"
 ")"); do { *((volatile int*)__null) = 4937; __attribute__((nomerge
)) ::abort(); } while (false); } } while (false);
4938  MOZ_ASSERT(aMessage != ePointerDown)do { static_assert( mozilla::detail::AssertionConditionType<
decltype(aMessage != ePointerDown)>::isValid, "invalid assertion condition"
); if ((__builtin_expect(!!(!(!!(aMessage != ePointerDown))),
 0))) { do { } while (false); MOZ_ReportAssertionFailure("aMessage != ePointerDown"
, "/var/lib/jenkins/workspace/firefox-scan-build/dom/events/EventStateManager.cpp"
, 4938); AnnotateMozCrashReason("MOZ_ASSERT" "(" "aMessage != ePointerDown"
 ")"); do { *((volatile int*)__null) = 4938; __attribute__((nomerge
)) ::abort(); } while (false); } } while (false);
4939  MOZ_ASSERT(aMessage != ePointerUp)do { static_assert( mozilla::detail::AssertionConditionType<
decltype(aMessage != ePointerUp)>::isValid, "invalid assertion condition"
); if ((__builtin_expect(!!(!(!!(aMessage != ePointerUp))), 0
))) { do { } while (false); MOZ_ReportAssertionFailure("aMessage != ePointerUp"
, "/var/lib/jenkins/workspace/firefox-scan-build/dom/events/EventStateManager.cpp"
, 4939); AnnotateMozCrashReason("MOZ_ASSERT" "(" "aMessage != ePointerUp"
 ")"); do { *((volatile int*)__null) = 4939; __attribute__((nomerge
)) ::abort(); } while (false); } } while (false);
4940  // This method is currently designed to create the following events.
4941  MOZ_ASSERT(aMessage == eMouseOver || aMessage == eMouseEnter ||do { static_assert( mozilla::detail::AssertionConditionType<
decltype(aMessage == eMouseOver || aMessage == eMouseEnter ||
 aMessage == eMouseOut || aMessage == eMouseLeave || aMessage
 == ePointerOver || aMessage == ePointerEnter || aMessage == ePointerOut
 || aMessage == ePointerLeave || aMessage == eMouseEnterIntoWidget
 || aMessage == eMouseExitFromWidget)>::isValid, "invalid assertion condition"
); if ((__builtin_expect(!!(!(!!(aMessage == eMouseOver || aMessage
 == eMouseEnter || aMessage == eMouseOut || aMessage == eMouseLeave
 || aMessage == ePointerOver || aMessage == ePointerEnter || aMessage
 == ePointerOut || aMessage == ePointerLeave || aMessage == eMouseEnterIntoWidget
 || aMessage == eMouseExitFromWidget))), 0))) { do { } while (
false); MOZ_ReportAssertionFailure("aMessage == eMouseOver || aMessage == eMouseEnter || aMessage == eMouseOut || aMessage == eMouseLeave || aMessage == ePointerOver || aMessage == ePointerEnter || aMessage == ePointerOut || aMessage == ePointerLeave || aMessage == eMouseEnterIntoWidget || aMessage == eMouseExitFromWidget"
, "/var/lib/jenkins/workspace/firefox-scan-build/dom/events/EventStateManager.cpp"
, 4946); AnnotateMozCrashReason("MOZ_ASSERT" "(" "aMessage == eMouseOver || aMessage == eMouseEnter || aMessage == eMouseOut || aMessage == eMouseLeave || aMessage == ePointerOver || aMessage == ePointerEnter || aMessage == ePointerOut || aMessage == ePointerLeave || aMessage == eMouseEnterIntoWidget || aMessage == eMouseExitFromWidget"
 ")"); do { *((volatile int*)__null) = 4946; __attribute__((nomerge
)) ::abort(); } while (false); } } while (false)
4942             aMessage == eMouseOut || aMessage == eMouseLeave ||do { static_assert( mozilla::detail::AssertionConditionType<
decltype(aMessage == eMouseOver || aMessage == eMouseEnter ||
 aMessage == eMouseOut || aMessage == eMouseLeave || aMessage
 == ePointerOver || aMessage == ePointerEnter || aMessage == ePointerOut
 || aMessage == ePointerLeave || aMessage == eMouseEnterIntoWidget
 || aMessage == eMouseExitFromWidget)>::isValid, "invalid assertion condition"
); if ((__builtin_expect(!!(!(!!(aMessage == eMouseOver || aMessage
 == eMouseEnter || aMessage == eMouseOut || aMessage == eMouseLeave
 || aMessage == ePointerOver || aMessage == ePointerEnter || aMessage
 == ePointerOut || aMessage == ePointerLeave || aMessage == eMouseEnterIntoWidget
 || aMessage == eMouseExitFromWidget))), 0))) { do { } while (
false); MOZ_ReportAssertionFailure("aMessage == eMouseOver || aMessage == eMouseEnter || aMessage == eMouseOut || aMessage == eMouseLeave || aMessage == ePointerOver || aMessage == ePointerEnter || aMessage == ePointerOut || aMessage == ePointerLeave || aMessage == eMouseEnterIntoWidget || aMessage == eMouseExitFromWidget"
, "/var/lib/jenkins/workspace/firefox-scan-build/dom/events/EventStateManager.cpp"
, 4946); AnnotateMozCrashReason("MOZ_ASSERT" "(" "aMessage == eMouseOver || aMessage == eMouseEnter || aMessage == eMouseOut || aMessage == eMouseLeave || aMessage == ePointerOver || aMessage == ePointerEnter || aMessage == ePointerOut || aMessage == ePointerLeave || aMessage == eMouseEnterIntoWidget || aMessage == eMouseExitFromWidget"
 ")"); do { *((volatile int*)__null) = 4946; __attribute__((nomerge
)) ::abort(); } while (false); } } while (false)
4943             aMessage == ePointerOver || aMessage == ePointerEnter ||do { static_assert( mozilla::detail::AssertionConditionType<
decltype(aMessage == eMouseOver || aMessage == eMouseEnter ||
 aMessage == eMouseOut || aMessage == eMouseLeave || aMessage
 == ePointerOver || aMessage == ePointerEnter || aMessage == ePointerOut
 || aMessage == ePointerLeave || aMessage == eMouseEnterIntoWidget
 || aMessage == eMouseExitFromWidget)>::isValid, "invalid assertion condition"
); if ((__builtin_expect(!!(!(!!(aMessage == eMouseOver || aMessage
 == eMouseEnter || aMessage == eMouseOut || aMessage == eMouseLeave
 || aMessage == ePointerOver || aMessage == ePointerEnter || aMessage
 == ePointerOut || aMessage == ePointerLeave || aMessage == eMouseEnterIntoWidget
 || aMessage == eMouseExitFromWidget))), 0))) { do { } while (
false); MOZ_ReportAssertionFailure("aMessage == eMouseOver || aMessage == eMouseEnter || aMessage == eMouseOut || aMessage == eMouseLeave || aMessage == ePointerOver || aMessage == ePointerEnter || aMessage == ePointerOut || aMessage == ePointerLeave || aMessage == eMouseEnterIntoWidget || aMessage == eMouseExitFromWidget"
, "/var/lib/jenkins/workspace/firefox-scan-build/dom/events/EventStateManager.cpp"
, 4946); AnnotateMozCrashReason("MOZ_ASSERT" "(" "aMessage == eMouseOver || aMessage == eMouseEnter || aMessage == eMouseOut || aMessage == eMouseLeave || aMessage == ePointerOver || aMessage == ePointerEnter || aMessage == ePointerOut || aMessage == ePointerLeave || aMessage == eMouseEnterIntoWidget || aMessage == eMouseExitFromWidget"
 ")"); do { *((volatile int*)__null) = 4946; __attribute__((nomerge
)) ::abort(); } while (false); } } while (false)
4944             aMessage == ePointerOut || aMessage == ePointerLeave ||do { static_assert( mozilla::detail::AssertionConditionType<
decltype(aMessage == eMouseOver || aMessage == eMouseEnter ||
 aMessage == eMouseOut || aMessage == eMouseLeave || aMessage
 == ePointerOver || aMessage == ePointerEnter || aMessage == ePointerOut
 || aMessage == ePointerLeave || aMessage == eMouseEnterIntoWidget
 || aMessage == eMouseExitFromWidget)>::isValid, "invalid assertion condition"
); if ((__builtin_expect(!!(!(!!(aMessage == eMouseOver || aMessage
 == eMouseEnter || aMessage == eMouseOut || aMessage == eMouseLeave
 || aMessage == ePointerOver || aMessage == ePointerEnter || aMessage
 == ePointerOut || aMessage == ePointerLeave || aMessage == eMouseEnterIntoWidget
 || aMessage == eMouseExitFromWidget))), 0))) { do { } while (
false); MOZ_ReportAssertionFailure("aMessage == eMouseOver || aMessage == eMouseEnter || aMessage == eMouseOut || aMessage == eMouseLeave || aMessage == ePointerOver || aMessage == ePointerEnter || aMessage == ePointerOut || aMessage == ePointerLeave || aMessage == eMouseEnterIntoWidget || aMessage == eMouseExitFromWidget"
, "/var/lib/jenkins/workspace/firefox-scan-build/dom/events/EventStateManager.cpp"
, 4946); AnnotateMozCrashReason("MOZ_ASSERT" "(" "aMessage == eMouseOver || aMessage == eMouseEnter || aMessage == eMouseOut || aMessage == eMouseLeave || aMessage == ePointerOver || aMessage == ePointerEnter || aMessage == ePointerOut || aMessage == ePointerLeave || aMessage == eMouseEnterIntoWidget || aMessage == eMouseExitFromWidget"
 ")"); do { *((volatile int*)__null) = 4946; __attribute__((nomerge
)) ::abort(); } while (false); } } while (false)
4945             aMessage == eMouseEnterIntoWidget ||do { static_assert( mozilla::detail::AssertionConditionType<
decltype(aMessage == eMouseOver || aMessage == eMouseEnter ||
 aMessage == eMouseOut || aMessage == eMouseLeave || aMessage
 == ePointerOver || aMessage == ePointerEnter || aMessage == ePointerOut
 || aMessage == ePointerLeave || aMessage == eMouseEnterIntoWidget
 || aMessage == eMouseExitFromWidget)>::isValid, "invalid assertion condition"
); if ((__builtin_expect(!!(!(!!(aMessage == eMouseOver || aMessage
 == eMouseEnter || aMessage == eMouseOut || aMessage == eMouseLeave
 || aMessage == ePointerOver || aMessage == ePointerEnter || aMessage
 == ePointerOut || aMessage == ePointerLeave || aMessage == eMouseEnterIntoWidget
 || aMessage == eMouseExitFromWidget))), 0))) { do { } while (
false); MOZ_ReportAssertionFailure("aMessage == eMouseOver || aMessage == eMouseEnter || aMessage == eMouseOut || aMessage == eMouseLeave || aMessage == ePointerOver || aMessage == ePointerEnter || aMessage == ePointerOut || aMessage == ePointerLeave || aMessage == eMouseEnterIntoWidget || aMessage == eMouseExitFromWidget"
, "/var/lib/jenkins/workspace/firefox-scan-build/dom/events/EventStateManager.cpp"
, 4946); AnnotateMozCrashReason("MOZ_ASSERT" "(" "aMessage == eMouseOver || aMessage == eMouseEnter || aMessage == eMouseOut || aMessage == eMouseLeave || aMessage == ePointerOver || aMessage == ePointerEnter || aMessage == ePointerOut || aMessage == ePointerLeave || aMessage == eMouseEnterIntoWidget || aMessage == eMouseExitFromWidget"
 ")"); do { *((volatile int*)__null) = 4946; __attribute__((nomerge
)) ::abort(); } while (false); } } while (false)
4946             aMessage == eMouseExitFromWidget)do { static_assert( mozilla::detail::AssertionConditionType<
decltype(aMessage == eMouseOver || aMessage == eMouseEnter ||
 aMessage == eMouseOut || aMessage == eMouseLeave || aMessage
 == ePointerOver || aMessage == ePointerEnter || aMessage == ePointerOut
 || aMessage == ePointerLeave || aMessage == eMouseEnterIntoWidget
 || aMessage == eMouseExitFromWidget)>::isValid, "invalid assertion condition"
); if ((__builtin_expect(!!(!(!!(aMessage == eMouseOver || aMessage
 == eMouseEnter || aMessage == eMouseOut || aMessage == eMouseLeave
 || aMessage == ePointerOver || aMessage == ePointerEnter || aMessage
 == ePointerOut || aMessage == ePointerLeave || aMessage == eMouseEnterIntoWidget
 || aMessage == eMouseExitFromWidget))), 0))) { do { } while (
false); MOZ_ReportAssertionFailure("aMessage == eMouseOver || aMessage == eMouseEnter || aMessage == eMouseOut || aMessage == eMouseLeave || aMessage == ePointerOver || aMessage == ePointerEnter || aMessage == ePointerOut || aMessage == ePointerLeave || aMessage == eMouseEnterIntoWidget || aMessage == eMouseExitFromWidget"
, "/var/lib/jenkins/workspace/firefox-scan-build/dom/events/EventStateManager.cpp"
, 4946); AnnotateMozCrashReason("MOZ_ASSERT" "(" "aMessage == eMouseOver || aMessage == eMouseEnter || aMessage == eMouseOut || aMessage == eMouseLeave || aMessage == ePointerOver || aMessage == ePointerEnter || aMessage == ePointerOut || aMessage == ePointerLeave || aMessage == eMouseEnterIntoWidget || aMessage == eMouseExitFromWidget"
 ")"); do { *((volatile int*)__null) = 4946; __attribute__((nomerge
)) ::abort(); } while (false); } } while (false);
4947 
4948  WidgetPointerEvent* sourcePointer = aMouseEvent->AsPointerEvent();
4949  UniquePtr<WidgetMouseEvent> newEvent;
4950  if (sourcePointer) {
4951    AUTO_PROFILER_LABEL("CreateMouseOrPointerWidgetEvent", OTHER)mozilla::AutoProfilerLabel raiiObject4951( "CreateMouseOrPointerWidgetEvent"
, nullptr, JS::ProfilingCategoryPair::OTHER);
4952 
4953    WidgetPointerEvent* newPointerEvent = new WidgetPointerEvent(
4954        aMouseEvent->IsTrusted(), aMessage, aMouseEvent->mWidget);
4955    newPointerEvent->mIsPrimary = sourcePointer->mIsPrimary;
4956    newPointerEvent->mWidth = sourcePointer->mWidth;
4957    newPointerEvent->mHeight = sourcePointer->mHeight;
4958    newPointerEvent->mInputSource = sourcePointer->mInputSource;
4959 
4960    newEvent = WrapUnique(newPointerEvent);
4961  } else {
4962    newEvent = MakeUnique<WidgetMouseEvent>(aMouseEvent->IsTrusted(), aMessage,
4963                                            aMouseEvent->mWidget,
4964                                            WidgetMouseEvent::eReal);
4965  }
4966 
4967  // Inherit whether the event is synthesized by the test API or not.
4968  // Then, when the event is synthesized by a test API and handled in a remote
4969  // process, it won't be ignored.  See PresShell::HandleEvent().
4970  newEvent->mFlags.mIsSynthesizedForTests =
4971      aMouseEvent->mFlags.mIsSynthesizedForTests;
4972 
4973  newEvent->mRelatedTarget = aRelatedTarget;
4974  newEvent->mRefPoint = aMouseEvent->mRefPoint;
4975  newEvent->mModifiers = aMouseEvent->mModifiers;
4976  if (!aMouseEvent->mFlags.mDispatchedAtLeastOnce &&
4977      aMouseEvent->InputSourceSupportsHover()) {
4978    // If we synthesize a pointer event or a mouse event from another event
4979    // which changes a button state whose input soucre supports hover state and
4980    // the source event has not been dispatched yet, we should set to the button
4981    // state of the synthesizing event to previous one.
4982    // Note that we don't need to do this if the input source does not support
4983    // hover state because a WPT check the behavior (see below) and the other
4984    // browsers pass the test even though this is inconsistent behavior.
4985    newEvent->mButton =
4986        sourcePointer ? MouseButton::eNotPressed : MouseButton::ePrimary;
4987    if (aMouseEvent->IsPressingButton()) {
4988      // If the source event has not been dispatched into the DOM yet, we
4989      // need to remove the flag which is being pressed.
4990      newEvent->mButtons = static_cast<decltype(WidgetMouseEvent::mButtons)>(
4991          aMouseEvent->mButtons &
4992          ~MouseButtonsFlagToChange(
4993              static_cast<MouseButton>(aMouseEvent->mButton)));
4994    } else if (aMouseEvent->IsReleasingButton()) {
4995      // If the source event has not been dispatched into the DOM yet, we
4996      // need to add the flag which is being released.
4997      newEvent->mButtons = static_cast<decltype(WidgetMouseEvent::mButtons)>(
4998          aMouseEvent->mButtons |
4999          MouseButtonsFlagToChange(
5000              static_cast<MouseButton>(aMouseEvent->mButton)));
5001    } else {
5002      // The source event does not change the buttons state so that we can
5003      // set mButtons value as-is.
5004      newEvent->mButtons = aMouseEvent->mButtons;
5005    }
5006    // Adjust pressure if it does not matches with mButtons.
5007    // FIXME: We may use wrong pressure value if the source event has not been
5008    // dispatched into the DOM yet.  However, fixing this requires to store the
5009    // last pressure value somewhere.
5010    if (newEvent->mButtons && aMouseEvent->mPressure == 0) {
5011      newEvent->mPressure = 0.5f;
5012    } else if (!newEvent->mButtons && aMouseEvent->mPressure != 0) {
5013      newEvent->mPressure = 0;
5014    } else {
5015      newEvent->mPressure = aMouseEvent->mPressure;
5016    }
5017  } else {
5018    // If the event has already been dispatched into the tree, web apps has
5019    // already handled the button state change, so the button state of the
5020    // source event has already synced.
5021    // If the input source does not have hover state, we don't need to modify
5022    // the state because the other browsers behave so and tested by
5023    // pointerevent_attributes_nohover_pointers.html even though this is
5024    // different expectation from
5025    // pointerevent_attributes_hoverable_pointers.html, but the other browsers
5026    // pass both of them.
5027    newEvent->mButton = aMouseEvent->mButton;
5028    newEvent->mButtons = aMouseEvent->mButtons;
5029    newEvent->mPressure = aMouseEvent->mPressure;
5030  }
5031 
5032  newEvent->mInputSource = aMouseEvent->mInputSource;
5033  newEvent->pointerId = aMouseEvent->pointerId;
5034 
5035  return newEvent;
5036}
5037 
5038already_AddRefed<nsIWidget>
5039EventStateManager::DispatchMouseOrPointerBoundaryEvent(
5040    WidgetMouseEvent* aMouseEvent, EventMessage aMessage,
5041    nsIContent* aTargetContent, nsIContent* aRelatedContent) {
5042  MOZ_ASSERT(aMessage == eMouseEnter || aMessage == ePointerEnter ||do { static_assert( mozilla::detail::AssertionConditionType<
decltype(aMessage == eMouseEnter || aMessage == ePointerEnter
 || aMessage == eMouseLeave || aMessage == ePointerLeave || aMessage
 == eMouseOver || aMessage == ePointerOver || aMessage == eMouseOut
 || aMessage == ePointerOut)>::isValid, "invalid assertion condition"
); if ((__builtin_expect(!!(!(!!(aMessage == eMouseEnter || aMessage
 == ePointerEnter || aMessage == eMouseLeave || aMessage == ePointerLeave
 || aMessage == eMouseOver || aMessage == ePointerOver || aMessage
 == eMouseOut || aMessage == ePointerOut))), 0))) { do { } while
 (false); MOZ_ReportAssertionFailure("aMessage == eMouseEnter || aMessage == ePointerEnter || aMessage == eMouseLeave || aMessage == ePointerLeave || aMessage == eMouseOver || aMessage == ePointerOver || aMessage == eMouseOut || aMessage == ePointerOut"
, "/var/lib/jenkins/workspace/firefox-scan-build/dom/events/EventStateManager.cpp"
, 5045); AnnotateMozCrashReason("MOZ_ASSERT" "(" "aMessage == eMouseEnter || aMessage == ePointerEnter || aMessage == eMouseLeave || aMessage == ePointerLeave || aMessage == eMouseOver || aMessage == ePointerOver || aMessage == eMouseOut || aMessage == ePointerOut"
 ")"); do { *((volatile int*)__null) = 5045; __attribute__((nomerge
)) ::abort(); } while (false); } } while (false)
5043             aMessage == eMouseLeave || aMessage == ePointerLeave ||do { static_assert( mozilla::detail::AssertionConditionType<
decltype(aMessage == eMouseEnter || aMessage == ePointerEnter
 || aMessage == eMouseLeave || aMessage == ePointerLeave || aMessage
 == eMouseOver || aMessage == ePointerOver || aMessage == eMouseOut
 || aMessage == ePointerOut)>::isValid, "invalid assertion condition"
); if ((__builtin_expect(!!(!(!!(aMessage == eMouseEnter || aMessage
 == ePointerEnter || aMessage == eMouseLeave || aMessage == ePointerLeave
 || aMessage == eMouseOver || aMessage == ePointerOver || aMessage
 == eMouseOut || aMessage == ePointerOut))), 0))) { do { } while
 (false); MOZ_ReportAssertionFailure("aMessage == eMouseEnter || aMessage == ePointerEnter || aMessage == eMouseLeave || aMessage == ePointerLeave || aMessage == eMouseOver || aMessage == ePointerOver || aMessage == eMouseOut || aMessage == ePointerOut"
, "/var/lib/jenkins/workspace/firefox-scan-build/dom/events/EventStateManager.cpp"
, 5045); AnnotateMozCrashReason("MOZ_ASSERT" "(" "aMessage == eMouseEnter || aMessage == ePointerEnter || aMessage == eMouseLeave || aMessage == ePointerLeave || aMessage == eMouseOver || aMessage == ePointerOver || aMessage == eMouseOut || aMessage == ePointerOut"
 ")"); do { *((volatile int*)__null) = 5045; __attribute__((nomerge
)) ::abort(); } while (false); } } while (false)
5044             aMessage == eMouseOver || aMessage == ePointerOver ||do { static_assert( mozilla::detail::AssertionConditionType<
decltype(aMessage == eMouseEnter || aMessage == ePointerEnter
 || aMessage == eMouseLeave || aMessage == ePointerLeave || aMessage
 == eMouseOver || aMessage == ePointerOver || aMessage == eMouseOut
 || aMessage == ePointerOut)>::isValid, "invalid assertion condition"
); if ((__builtin_expect(!!(!(!!(aMessage == eMouseEnter || aMessage
 == ePointerEnter || aMessage == eMouseLeave || aMessage == ePointerLeave
 || aMessage == eMouseOver || aMessage == ePointerOver || aMessage
 == eMouseOut || aMessage == ePointerOut))), 0))) { do { } while
 (false); MOZ_ReportAssertionFailure("aMessage == eMouseEnter || aMessage == ePointerEnter || aMessage == eMouseLeave || aMessage == ePointerLeave || aMessage == eMouseOver || aMessage == ePointerOver || aMessage == eMouseOut || aMessage == ePointerOut"
, "/var/lib/jenkins/workspace/firefox-scan-build/dom/events/EventStateManager.cpp"
, 5045); AnnotateMozCrashReason("MOZ_ASSERT" "(" "aMessage == eMouseEnter || aMessage == ePointerEnter || aMessage == eMouseLeave || aMessage == ePointerLeave || aMessage == eMouseOver || aMessage == ePointerOver || aMessage == eMouseOut || aMessage == ePointerOut"
 ")"); do { *((volatile int*)__null) = 5045; __attribute__((nomerge
)) ::abort(); } while (false); } } while (false)
5045             aMessage == eMouseOut || aMessage == ePointerOut)do { static_assert( mozilla::detail::AssertionConditionType<
decltype(aMessage == eMouseEnter || aMessage == ePointerEnter
 || aMessage == eMouseLeave || aMessage == ePointerLeave || aMessage
 == eMouseOver || aMessage == ePointerOver || aMessage == eMouseOut
 || aMessage == ePointerOut)>::isValid, "invalid assertion condition"
); if ((__builtin_expect(!!(!(!!(aMessage == eMouseEnter || aMessage
 == ePointerEnter || aMessage == eMouseLeave || aMessage == ePointerLeave
 || aMessage == eMouseOver || aMessage == ePointerOver || aMessage
 == eMouseOut || aMessage == ePointerOut))), 0))) { do { } while
 (false); MOZ_ReportAssertionFailure("aMessage == eMouseEnter || aMessage == ePointerEnter || aMessage == eMouseLeave || aMessage == ePointerLeave || aMessage == eMouseOver || aMessage == ePointerOver || aMessage == eMouseOut || aMessage == ePointerOut"
, "/var/lib/jenkins/workspace/firefox-scan-build/dom/events/EventStateManager.cpp"
, 5045); AnnotateMozCrashReason("MOZ_ASSERT" "(" "aMessage == eMouseEnter || aMessage == ePointerEnter || aMessage == eMouseLeave || aMessage == ePointerLeave || aMessage == eMouseOver || aMessage == ePointerOver || aMessage == eMouseOut || aMessage == ePointerOut"
 ")"); do { *((volatile int*)__null) = 5045; __attribute__((nomerge
)) ::abort(); } while (false); } } while (false);
5046 
5047  // https://w3c.github.io/pointerlock/#dom-element-requestpointerlock
5048  // "[Once in the locked state...E]vents that require the concept
5049  // of a mouse cursor must not be dispatched (for example: mouseover,
5050  // mouseout...).
5051  // XXXedgar should we also block pointer events?
5052  if (PointerLockManager::IsLocked() &&
5053      (aMessage == eMouseLeave || aMessage == eMouseEnter ||
5054       aMessage == eMouseOver || aMessage == eMouseOut)) {
5055    mCurrentTargetContent = nullptr;
5056    nsCOMPtr<Element> pointerLockedElement =
5057        PointerLockManager::GetLockedElement();
5058    if (!pointerLockedElement) {
5059      NS_WARNING("Should have pointer locked element, but didn't.")NS_DebugBreak(NS_DEBUG_WARNING, "Should have pointer locked element, but didn't."
, nullptr, "/var/lib/jenkins/workspace/firefox-scan-build/dom/events/EventStateManager.cpp"
, 5059);
5060      return nullptr;
5061    }
5062    nsIFrame* const pointerLockedFrame =
5063        mPresContext->GetPrimaryFrameFor(pointerLockedElement);
5064    if (NS_WARN_IF(!pointerLockedFrame)NS_warn_if_impl(!pointerLockedFrame, "!pointerLockedFrame", "/var/lib/jenkins/workspace/firefox-scan-build/dom/events/EventStateManager.cpp"
, 5064)) {
5065      return nullptr;
5066    }
5067    return do_AddRef(pointerLockedFrame->GetNearestWidget());
5068  }
5069 
5070  mCurrentTargetContent = nullptr;
5071 
5072  if (!aTargetContent) {
5073    return nullptr;
5074  }
5075 
5076  // Store the widget before dispatching the event because some event listeners
5077  // of the dispatching event may cause reframe the target or remove the target
5078  // from the tree.
5079  nsCOMPtr<nsIWidget> targetWidget;
5080  if (nsIFrame* const targetFrame =
5081          mPresContext->GetPrimaryFrameFor(aTargetContent)) {
5082    targetWidget = targetFrame->GetNearestWidget();
5083  }
5084 
5085  nsCOMPtr<nsIContent> targetContent = aTargetContent;
5086  nsCOMPtr<nsIContent> relatedContent = aRelatedContent;
5087 
5088  UniquePtr<WidgetMouseEvent> dispatchEvent =
5089      CreateMouseOrPointerWidgetEvent(aMouseEvent, aMessage, relatedContent);
5090 
5091  AutoWeakFrame previousTarget = mCurrentTarget;
5092  mCurrentTargetContent = targetContent;
5093 
5094  nsEventStatus status = nsEventStatus_eIgnore;
5095  ESMEventCB callback(targetContent);
5096  RefPtr<nsPresContext> presContext = mPresContext;
5097  EventDispatcher::Dispatch(targetContent, presContext, dispatchEvent.get(),
5098                            nullptr, &status, &callback);
5099 
5100  if (mPresContext) {
5101    // If we are entering/leaving remote content, dispatch a mouse enter/exit
5102    // event to the remote frame.
5103    if (IsTopLevelRemoteTarget(targetContent)) {
5104      if (aMessage == eMouseOut) {
5105        // For remote content, send a puppet widget mouse exit event.
5106        UniquePtr<WidgetMouseEvent> remoteEvent =
5107            CreateMouseOrPointerWidgetEvent(aMouseEvent, eMouseExitFromWidget,
5108                                            relatedContent);
5109        remoteEvent->mExitFrom = Some(WidgetMouseEvent::ePuppet);
5110 
5111        // mCurrentTarget is set to the new target, so we must reset it to the
5112        // old target and then dispatch a cross-process event. (mCurrentTarget
5113        // will be set back below.) HandleCrossProcessEvent will query for the
5114        // proper target via GetEventTarget which will return mCurrentTarget.
5115        mCurrentTarget = mPresContext->GetPrimaryFrameFor(targetContent);
5116        HandleCrossProcessEvent(remoteEvent.get(), &status);
5117      } else if (aMessage == eMouseOver) {
5118        UniquePtr<WidgetMouseEvent> remoteEvent =
5119            CreateMouseOrPointerWidgetEvent(aMouseEvent, eMouseEnterIntoWidget,
5120                                            relatedContent);
5121        HandleCrossProcessEvent(remoteEvent.get(), &status);
5122      }
5123    }
5124  }
5125 
5126  mCurrentTargetContent = nullptr;
5127  mCurrentTarget = previousTarget;
5128 
5129  return targetWidget.forget();
5130}
5131 
5132static nsIContent* FindCommonAncestor(nsIContent* aNode1, nsIContent* aNode2) {
5133  if (!aNode1 || !aNode2) {
5134    return nullptr;
5135  }
5136  return nsContentUtils::GetCommonFlattenedTreeAncestor(aNode1, aNode2);
5137}
5138 
5139class EnterLeaveDispatcher {
5140 public:
5141  EnterLeaveDispatcher(EventStateManager* aESM, nsIContent* aTarget,
5142                       nsIContent* aRelatedTarget,
5143                       WidgetMouseEvent* aMouseEvent,
5144                       EventMessage aEventMessage)
5145      : mESM(aESM), mMouseEvent(aMouseEvent), mEventMessage(aEventMessage) {
5146    nsPIDOMWindowInner* win =
5147        aTarget ? aTarget->OwnerDoc()->GetInnerWindow() : nullptr;
5148    if (aMouseEvent->AsPointerEvent()
5149            ? win && win->HasPointerEnterLeaveEventListeners()
5150            : win && win->HasMouseEnterLeaveEventListeners()) {
5151      mRelatedTarget =
5152          aRelatedTarget ? aRelatedTarget->FindFirstNonChromeOnlyAccessContent()
5153                         : nullptr;
5154      nsINode* commonParent = FindCommonAncestor(aTarget, aRelatedTarget);
5155      nsIContent* current = aTarget;
5156      // Note, it is ok if commonParent is null!
5157      while (current && current != commonParent) {
5158        if (!current->ChromeOnlyAccess()) {
5159          mTargets.AppendObject(current);
5160        }
5161        // mouseenter/leave is fired only on elements.
5162        current = current->GetFlattenedTreeParent();
5163      }
5164    }
5165  }
5166 
5167  // TODO: Convert this to MOZ_CAN_RUN_SCRIPT (bug 1415230)
5168  MOZ_CAN_RUN_SCRIPT_BOUNDARY void Dispatch() {
5169    if (mEventMessage == eMouseEnter || mEventMessage == ePointerEnter) {
5170      for (int32_t i = mTargets.Count() - 1; i >= 0; --i) {
5171        nsCOMPtr<nsIWidget> widget = mESM->DispatchMouseOrPointerBoundaryEvent(
5172            mMouseEvent, mEventMessage, MOZ_KnownLive(mTargets[i])(mTargets[i]),
5173            mRelatedTarget);
5174      }
5175    } else {
5176      for (int32_t i = 0; i < mTargets.Count(); ++i) {
5177        nsCOMPtr<nsIWidget> widget = mESM->DispatchMouseOrPointerBoundaryEvent(
5178            mMouseEvent, mEventMessage, MOZ_KnownLive(mTargets[i])(mTargets[i]),
5179            mRelatedTarget);
5180      }
5181    }
5182  }
5183 
5184  // Nothing overwrites anything after constructor. Please remove MOZ_KnownLive
5185  // and MOZ_KNOWN_LIVE if anything marked as such becomes mutable.
5186  const RefPtr<EventStateManager> mESM;
5187  nsCOMArray<nsIContent> mTargets;
5188  MOZ_KNOWN_LIVE nsCOMPtr<nsIContent> mRelatedTarget;
5189  WidgetMouseEvent* mMouseEvent;
5190  EventMessage mEventMessage;
5191};
5192 
5193void EventStateManager::NotifyMouseOut(WidgetMouseEvent* aMouseEvent,
5194                                       nsIContent* aMovingInto) {
5195  const bool isPointer = aMouseEvent->mClass == ePointerEventClass;
5196  LogModule* const logModule =
5197      isPointer ? sPointerBoundaryLog : sMouseBoundaryLog;
5198 
5199  RefPtr<OverOutElementsWrapper> wrapper = GetWrapperByEventID(aMouseEvent);
5200 
5201  // If there is no deepest "leave" event target, that means the last "over"
5202  // target has already been removed from the tree.  Therefore, checking only
5203  // the "leave" event target is enough.
5204  if (!wrapper || !wrapper->GetDeepestLeaveEventTarget()) {
5205    return;
5206  }
5207  // Before firing "out" and/or "leave" events, check for recursion
5208  if (wrapper->IsDispatchingOutEventOnLastOverEventTarget()) {
5209    return;
5210  }
5211 
5212  MOZ_LOG(logModule, LogLevel::Info,do { const ::mozilla::LogModule* moz_real_module = logModule;
 if ((__builtin_expect(!!(mozilla::detail::log_test(moz_real_module
, LogLevel::Info)), 0))) { mozilla::detail::log_print(moz_real_module
, LogLevel::Info, "NotifyMouseOut: the source event is %s (IsReal()=%s)"
, ToChar(aMouseEvent->mMessage), aMouseEvent->IsReal() ?
 "true" : "false"); } } while (0)
5213          ("NotifyMouseOut: the source event is %s (IsReal()=%s)",do { const ::mozilla::LogModule* moz_real_module = logModule;
 if ((__builtin_expect(!!(mozilla::detail::log_test(moz_real_module
, LogLevel::Info)), 0))) { mozilla::detail::log_print(moz_real_module
, LogLevel::Info, "NotifyMouseOut: the source event is %s (IsReal()=%s)"
, ToChar(aMouseEvent->mMessage), aMouseEvent->IsReal() ?
 "true" : "false"); } } while (0)
5214           ToChar(aMouseEvent->mMessage),do { const ::mozilla::LogModule* moz_real_module = logModule;
 if ((__builtin_expect(!!(mozilla::detail::log_test(moz_real_module
, LogLevel::Info)), 0))) { mozilla::detail::log_print(moz_real_module
, LogLevel::Info, "NotifyMouseOut: the source event is %s (IsReal()=%s)"
, ToChar(aMouseEvent->mMessage), aMouseEvent->IsReal() ?
 "true" : "false"); } } while (0)
5215           aMouseEvent->IsReal() ? "true" : "false"))do { const ::mozilla::LogModule* moz_real_module = logModule;
 if ((__builtin_expect(!!(mozilla::detail::log_test(moz_real_module
, LogLevel::Info)), 0))) { mozilla::detail::log_print(moz_real_module
, LogLevel::Info, "NotifyMouseOut: the source event is %s (IsReal()=%s)"
, ToChar(aMouseEvent->mMessage), aMouseEvent->IsReal() ?
 "true" : "false"); } } while (0);
5216 
5217  // XXX If a content node is a container of remove content, it should be
5218  // replaced with them and its children should not be visible.  Therefore,
5219  // if the deepest "enter" target is not the last "over" target, i.e., the
5220  // last "over" target has been removed from the DOM tree, it means that the
5221  // child/descendant was not replaced by remote content.  So,
5222  // wrapper->GetOutEventTaget() may be enough here.
5223  if (RefPtr<nsFrameLoaderOwner> flo =
5224          do_QueryObject(wrapper->GetDeepestLeaveEventTarget())) {
5225    if (BrowsingContext* bc = flo->GetExtantBrowsingContext()) {
5226      if (nsIDocShell* docshell = bc->GetDocShell()) {
5227        if (RefPtr<nsPresContext> presContext = docshell->GetPresContext()) {
5228          EventStateManager* kidESM = presContext->EventStateManager();
5229          // Not moving into any element in this subdocument
5230          MOZ_LOG(logModule, LogLevel::Info,do { const ::mozilla::LogModule* moz_real_module = logModule;
 if ((__builtin_expect(!!(mozilla::detail::log_test(moz_real_module
, LogLevel::Info)), 0))) { mozilla::detail::log_print(moz_real_module
, LogLevel::Info, "Notifying child EventStateManager (%p) of \"out\" "
 "event...", kidESM); } } while (0)
5231                  ("Notifying child EventStateManager (%p) of \"out\" "do { const ::mozilla::LogModule* moz_real_module = logModule;
 if ((__builtin_expect(!!(mozilla::detail::log_test(moz_real_module
, LogLevel::Info)), 0))) { mozilla::detail::log_print(moz_real_module
, LogLevel::Info, "Notifying child EventStateManager (%p) of \"out\" "
 "event...", kidESM); } } while (0)
5232                   "event...",do { const ::mozilla::LogModule* moz_real_module = logModule;
 if ((__builtin_expect(!!(mozilla::detail::log_test(moz_real_module
, LogLevel::Info)), 0))) { mozilla::detail::log_print(moz_real_module
, LogLevel::Info, "Notifying child EventStateManager (%p) of \"out\" "
 "event...", kidESM); } } while (0)
5233                   kidESM))do { const ::mozilla::LogModule* moz_real_module = logModule;
 if ((__builtin_expect(!!(mozilla::detail::log_test(moz_real_module
, LogLevel::Info)), 0))) { mozilla::detail::log_print(moz_real_module
, LogLevel::Info, "Notifying child EventStateManager (%p) of \"out\" "
 "event...", kidESM); } } while (0);
5234          kidESM->NotifyMouseOut(aMouseEvent, nullptr);
5235        }
5236      }
5237    }
5238  }
5239  // That could have caused DOM events which could wreak havoc. Reverify
5240  // things and be careful.
5241  if (!wrapper->GetDeepestLeaveEventTarget()) {
5242    return;
5243  }
5244 
5245  wrapper->WillDispatchOutAndOrLeaveEvent();
5246 
5247  // Don't touch hover state if aMovingInto is non-null.  Caller will update
5248  // hover state itself, and we have optimizations for hover switching between
5249  // two nearby elements both deep in the DOM tree that would be defeated by
5250  // switching the hover state to null here.
5251  if (!aMovingInto && !isPointer) {
5252    // Unset :hover
5253    SetContentState(nullptr, ElementState::HOVER);
5254  }
5255 
5256  EnterLeaveDispatcher leaveDispatcher(
5257      this, wrapper->GetDeepestLeaveEventTarget(), aMovingInto, aMouseEvent,
5258      isPointer ? ePointerLeave : eMouseLeave);
5259 
5260  // "out" events hould be fired only when the deepest "leave" event target
5261  // is the last "over" event target.
5262  if (nsCOMPtr<nsIContent> outEventTarget = wrapper->GetOutEventTarget()) {
5263    MOZ_LOG(logModule, LogLevel::Info,do { const ::mozilla::LogModule* moz_real_module = logModule;
 if ((__builtin_expect(!!(mozilla::detail::log_test(moz_real_module
, LogLevel::Info)), 0))) { mozilla::detail::log_print(moz_real_module
, LogLevel::Info, "Dispatching %s event to %s (%p)", isPointer
 ? "ePointerOut" : "eMouseOut", outEventTarget ? ToString(*outEventTarget
).c_str() : "nullptr", outEventTarget.get()); } } while (0)
5264            ("Dispatching %s event to %s (%p)",do { const ::mozilla::LogModule* moz_real_module = logModule;
 if ((__builtin_expect(!!(mozilla::detail::log_test(moz_real_module
, LogLevel::Info)), 0))) { mozilla::detail::log_print(moz_real_module
, LogLevel::Info, "Dispatching %s event to %s (%p)", isPointer
 ? "ePointerOut" : "eMouseOut", outEventTarget ? ToString(*outEventTarget
).c_str() : "nullptr", outEventTarget.get()); } } while (0)
5265             isPointer ? "ePointerOut" : "eMouseOut",do { const ::mozilla::LogModule* moz_real_module = logModule;
 if ((__builtin_expect(!!(mozilla::detail::log_test(moz_real_module
, LogLevel::Info)), 0))) { mozilla::detail::log_print(moz_real_module
, LogLevel::Info, "Dispatching %s event to %s (%p)", isPointer
 ? "ePointerOut" : "eMouseOut", outEventTarget ? ToString(*outEventTarget
).c_str() : "nullptr", outEventTarget.get()); } } while (0)
5266             outEventTarget ? ToString(*outEventTarget).c_str() : "nullptr",do { const ::mozilla::LogModule* moz_real_module = logModule;
 if ((__builtin_expect(!!(mozilla::detail::log_test(moz_real_module
, LogLevel::Info)), 0))) { mozilla::detail::log_print(moz_real_module
, LogLevel::Info, "Dispatching %s event to %s (%p)", isPointer
 ? "ePointerOut" : "eMouseOut", outEventTarget ? ToString(*outEventTarget
).c_str() : "nullptr", outEventTarget.get()); } } while (0)
5267             outEventTarget.get()))do { const ::mozilla::LogModule* moz_real_module = logModule;
 if ((__builtin_expect(!!(mozilla::detail::log_test(moz_real_module
, LogLevel::Info)), 0))) { mozilla::detail::log_print(moz_real_module
, LogLevel::Info, "Dispatching %s event to %s (%p)", isPointer
 ? "ePointerOut" : "eMouseOut", outEventTarget ? ToString(*outEventTarget
).c_str() : "nullptr", outEventTarget.get()); } } while (0);
5268    nsCOMPtr<nsIWidget> widget = DispatchMouseOrPointerBoundaryEvent(
5269        aMouseEvent, isPointer ? ePointerOut : eMouseOut, outEventTarget,
5270        aMovingInto);
5271  }
5272 
5273  MOZ_LOG(logModule, LogLevel::Info,do { const ::mozilla::LogModule* moz_real_module = logModule;
 if ((__builtin_expect(!!(mozilla::detail::log_test(moz_real_module
, LogLevel::Info)), 0))) { mozilla::detail::log_print(moz_real_module
, LogLevel::Info, "Dispatching %s event to %s (%p) and its ancestors"
, isPointer ? "ePointerLeave" : "eMouseLeave", wrapper->GetDeepestLeaveEventTarget
() ? ToString(*wrapper->GetDeepestLeaveEventTarget()).c_str
() : "nullptr", wrapper->GetDeepestLeaveEventTarget()); } }
 while (0)
5274          ("Dispatching %s event to %s (%p) and its ancestors",do { const ::mozilla::LogModule* moz_real_module = logModule;
 if ((__builtin_expect(!!(mozilla::detail::log_test(moz_real_module
, LogLevel::Info)), 0))) { mozilla::detail::log_print(moz_real_module
, LogLevel::Info, "Dispatching %s event to %s (%p) and its ancestors"
, isPointer ? "ePointerLeave" : "eMouseLeave", wrapper->GetDeepestLeaveEventTarget
() ? ToString(*wrapper->GetDeepestLeaveEventTarget()).c_str
() : "nullptr", wrapper->GetDeepestLeaveEventTarget()); } }
 while (0)
5275           isPointer ? "ePointerLeave" : "eMouseLeave",do { const ::mozilla::LogModule* moz_real_module = logModule;
 if ((__builtin_expect(!!(mozilla::detail::log_test(moz_real_module
, LogLevel::Info)), 0))) { mozilla::detail::log_print(moz_real_module
, LogLevel::Info, "Dispatching %s event to %s (%p) and its ancestors"
, isPointer ? "ePointerLeave" : "eMouseLeave", wrapper->GetDeepestLeaveEventTarget
() ? ToString(*wrapper->GetDeepestLeaveEventTarget()).c_str
() : "nullptr", wrapper->GetDeepestLeaveEventTarget()); } }
 while (0)
5276           wrapper->GetDeepestLeaveEventTarget()do { const ::mozilla::LogModule* moz_real_module = logModule;
 if ((__builtin_expect(!!(mozilla::detail::log_test(moz_real_module
, LogLevel::Info)), 0))) { mozilla::detail::log_print(moz_real_module
, LogLevel::Info, "Dispatching %s event to %s (%p) and its ancestors"
, isPointer ? "ePointerLeave" : "eMouseLeave", wrapper->GetDeepestLeaveEventTarget
() ? ToString(*wrapper->GetDeepestLeaveEventTarget()).c_str
() : "nullptr", wrapper->GetDeepestLeaveEventTarget()); } }
 while (0)
5277               ? ToString(*wrapper->GetDeepestLeaveEventTarget()).c_str()do { const ::mozilla::LogModule* moz_real_module = logModule;
 if ((__builtin_expect(!!(mozilla::detail::log_test(moz_real_module
, LogLevel::Info)), 0))) { mozilla::detail::log_print(moz_real_module
, LogLevel::Info, "Dispatching %s event to %s (%p) and its ancestors"
, isPointer ? "ePointerLeave" : "eMouseLeave", wrapper->GetDeepestLeaveEventTarget
() ? ToString(*wrapper->GetDeepestLeaveEventTarget()).c_str
() : "nullptr", wrapper->GetDeepestLeaveEventTarget()); } }
 while (0)
5278               : "nullptr",do { const ::mozilla::LogModule* moz_real_module = logModule;
 if ((__builtin_expect(!!(mozilla::detail::log_test(moz_real_module
, LogLevel::Info)), 0))) { mozilla::detail::log_print(moz_real_module
, LogLevel::Info, "Dispatching %s event to %s (%p) and its ancestors"
, isPointer ? "ePointerLeave" : "eMouseLeave", wrapper->GetDeepestLeaveEventTarget
() ? ToString(*wrapper->GetDeepestLeaveEventTarget()).c_str
() : "nullptr", wrapper->GetDeepestLeaveEventTarget()); } }
 while (0)
5279           wrapper->GetDeepestLeaveEventTarget()))do { const ::mozilla::LogModule* moz_real_module = logModule;
 if ((__builtin_expect(!!(mozilla::detail::log_test(moz_real_module
, LogLevel::Info)), 0))) { mozilla::detail::log_print(moz_real_module
, LogLevel::Info, "Dispatching %s event to %s (%p) and its ancestors"
, isPointer ? "ePointerLeave" : "eMouseLeave", wrapper->GetDeepestLeaveEventTarget
() ? ToString(*wrapper->GetDeepestLeaveEventTarget()).c_str
() : "nullptr", wrapper->GetDeepestLeaveEventTarget()); } }
 while (0);
5280  leaveDispatcher.Dispatch();
5281 
5282  MOZ_LOG(logModule, LogLevel::Info,do { const ::mozilla::LogModule* moz_real_module = logModule;
 if ((__builtin_expect(!!(mozilla::detail::log_test(moz_real_module
, LogLevel::Info)), 0))) { mozilla::detail::log_print(moz_real_module
, LogLevel::Info, "Dispatched \"out\" and/or \"leave\" events"
); } } while (0)
5283          ("Dispatched \"out\" and/or \"leave\" events"))do { const ::mozilla::LogModule* moz_real_module = logModule;
 if ((__builtin_expect(!!(mozilla::detail::log_test(moz_real_module
, LogLevel::Info)), 0))) { mozilla::detail::log_print(moz_real_module
, LogLevel::Info, "Dispatched \"out\" and/or \"leave\" events"
); } } while (0);
5284  wrapper->DidDispatchOutAndOrLeaveEvent();
5285}
5286 
5287void EventStateManager::RecomputeMouseEnterStateForRemoteFrame(
5288    Element& aElement) {
5289  if (!mMouseEnterLeaveHelper ||
5290      mMouseEnterLeaveHelper->GetDeepestLeaveEventTarget() != &aElement) {
5291    return;
5292  }
5293 
5294  if (BrowserParent* remote = BrowserParent::GetFrom(&aElement)) {
5295    remote->MouseEnterIntoWidget();
5296  }
5297}
5298 
5299void EventStateManager::NotifyMouseOver(WidgetMouseEvent* aMouseEvent,
5300                                        nsIContent* aContent) {
5301  NS_ASSERTION(aContent, "Mouse must be over something")do { if (!(aContent)) { NS_DebugBreak(NS_DEBUG_ASSERTION, "Mouse must be over something"
, "aContent", "/var/lib/jenkins/workspace/firefox-scan-build/dom/events/EventStateManager.cpp"
, 5301); MOZ_PretendNoReturn(); } } while (0);
5302 
5303  const bool isPointer = aMouseEvent->mClass == ePointerEventClass;
5304  LogModule* const logModule =
5305      isPointer ? sPointerBoundaryLog : sMouseBoundaryLog;
5306 
5307  RefPtr<OverOutElementsWrapper> wrapper = GetWrapperByEventID(aMouseEvent);
5308 
5309  // If we have next "out" event target and it's the new "over" target, we don't
5310  // need to dispatch "out" nor "enter" event.
5311  if (!wrapper || aContent == wrapper->GetOutEventTarget()) {
5312    return;
5313  }
5314 
5315  // Before firing "over" and "enter" events, check for recursion
5316  if (wrapper->IsDispatchingOverEventOn(aContent)) {
5317    return;
5318  }
5319 
5320  MOZ_LOG(logModule, LogLevel::Info,do { const ::mozilla::LogModule* moz_real_module = logModule;
 if ((__builtin_expect(!!(mozilla::detail::log_test(moz_real_module
, LogLevel::Info)), 0))) { mozilla::detail::log_print(moz_real_module
, LogLevel::Info, "NotifyMouseOver: the source event is %s (IsReal()=%s)"
, ToChar(aMouseEvent->mMessage), aMouseEvent->IsReal() ?
 "true" : "false"); } } while (0)
5321          ("NotifyMouseOver: the source event is %s (IsReal()=%s)",do { const ::mozilla::LogModule* moz_real_module = logModule;
 if ((__builtin_expect(!!(mozilla::detail::log_test(moz_real_module
, LogLevel::Info)), 0))) { mozilla::detail::log_print(moz_real_module
, LogLevel::Info, "NotifyMouseOver: the source event is %s (IsReal()=%s)"
, ToChar(aMouseEvent->mMessage), aMouseEvent->IsReal() ?
 "true" : "false"); } } while (0)
5322           ToChar(aMouseEvent->mMessage),do { const ::mozilla::LogModule* moz_real_module = logModule;
 if ((__builtin_expect(!!(mozilla::detail::log_test(moz_real_module
, LogLevel::Info)), 0))) { mozilla::detail::log_print(moz_real_module
, LogLevel::Info, "NotifyMouseOver: the source event is %s (IsReal()=%s)"
, ToChar(aMouseEvent->mMessage), aMouseEvent->IsReal() ?
 "true" : "false"); } } while (0)
5323           aMouseEvent->IsReal() ? "true" : "false"))do { const ::mozilla::LogModule* moz_real_module = logModule;
 if ((__builtin_expect(!!(mozilla::detail::log_test(moz_real_module
, LogLevel::Info)), 0))) { mozilla::detail::log_print(moz_real_module
, LogLevel::Info, "NotifyMouseOver: the source event is %s (IsReal()=%s)"
, ToChar(aMouseEvent->mMessage), aMouseEvent->IsReal() ?
 "true" : "false"); } } while (0);
5324 
5325  // Check to see if we're a subdocument and if so update the parent
5326  // document's ESM state to indicate that the mouse is over the
5327  // content associated with our subdocument.
5328  EnsureDocument(mPresContext);
5329  if (Document* parentDoc = mDocument->GetInProcessParentDocument()) {
5330    if (nsCOMPtr<nsIContent> docContent = mDocument->GetEmbedderElement()) {
5331      if (PresShell* parentPresShell = parentDoc->GetPresShell()) {
5332        RefPtr<EventStateManager> parentESM =
5333            parentPresShell->GetPresContext()->EventStateManager();
5334        MOZ_LOG(logModule, LogLevel::Info,do { const ::mozilla::LogModule* moz_real_module = logModule;
 if ((__builtin_expect(!!(mozilla::detail::log_test(moz_real_module
, LogLevel::Info)), 0))) { mozilla::detail::log_print(moz_real_module
, LogLevel::Info, "Notifying parent EventStateManager (%p) of \"over\" "
 "event...", parentESM.get()); } } while (0)
5335                ("Notifying parent EventStateManager (%p) of \"over\" "do { const ::mozilla::LogModule* moz_real_module = logModule;
 if ((__builtin_expect(!!(mozilla::detail::log_test(moz_real_module
, LogLevel::Info)), 0))) { mozilla::detail::log_print(moz_real_module
, LogLevel::Info, "Notifying parent EventStateManager (%p) of \"over\" "
 "event...", parentESM.get()); } } while (0)
5336                 "event...",do { const ::mozilla::LogModule* moz_real_module = logModule;
 if ((__builtin_expect(!!(mozilla::detail::log_test(moz_real_module
, LogLevel::Info)), 0))) { mozilla::detail::log_print(moz_real_module
, LogLevel::Info, "Notifying parent EventStateManager (%p) of \"over\" "
 "event...", parentESM.get()); } } while (0)
5337                 parentESM.get()))do { const ::mozilla::LogModule* moz_real_module = logModule;
 if ((__builtin_expect(!!(mozilla::detail::log_test(moz_real_module
, LogLevel::Info)), 0))) { mozilla::detail::log_print(moz_real_module
, LogLevel::Info, "Notifying parent EventStateManager (%p) of \"over\" "
 "event...", parentESM.get()); } } while (0);
5338        parentESM->NotifyMouseOver(aMouseEvent, docContent);
5339      }
5340    }
5341  }
5342  // Firing the DOM event in the parent document could cause all kinds
5343  // of havoc.  Reverify and take care.
5344  if (aContent == wrapper->GetOutEventTarget()) {
5345    return;
5346  }
5347 
5348  // Remember the deepest leave event target as the related content for the
5349  // DispatchMouseOrPointerBoundaryEvent() call below, since NotifyMouseOut()
5350  // resets it, bug 298477.
5351  nsCOMPtr<nsIContent> deepestLeaveEventTarget =
5352      wrapper->GetDeepestLeaveEventTarget();
5353 
5354  EnterLeaveDispatcher enterDispatcher(this, aContent, deepestLeaveEventTarget,
5355                                       aMouseEvent,
5356                                       isPointer ? ePointerEnter : eMouseEnter);
5357 
5358  if (!isPointer) {
5359    SetContentState(aContent, ElementState::HOVER);
5360  }
5361 
5362  NotifyMouseOut(aMouseEvent, aContent);
5363 
5364  wrapper->WillDispatchOverAndEnterEvent(aContent);
5365 
5366  // Fire mouseover
5367  // XXX If aContent has already been removed from the DOM tree, what should we
5368  // do? At least, dispatching `mouseover` on it is odd.
5369  MOZ_LOG(logModule, LogLevel::Info,do { const ::mozilla::LogModule* moz_real_module = logModule;
 if ((__builtin_expect(!!(mozilla::detail::log_test(moz_real_module
, LogLevel::Info)), 0))) { mozilla::detail::log_print(moz_real_module
, LogLevel::Info, "Dispatching %s event to %s (%p)", isPointer
 ? "ePointerOver" : "eMoustOver", aContent ? ToString(*aContent
).c_str() : "nullptr", aContent); } } while (0)
5370          ("Dispatching %s event to %s (%p)",do { const ::mozilla::LogModule* moz_real_module = logModule;
 if ((__builtin_expect(!!(mozilla::detail::log_test(moz_real_module
, LogLevel::Info)), 0))) { mozilla::detail::log_print(moz_real_module
, LogLevel::Info, "Dispatching %s event to %s (%p)", isPointer
 ? "ePointerOver" : "eMoustOver", aContent ? ToString(*aContent
).c_str() : "nullptr", aContent); } } while (0)
5371           isPointer ? "ePointerOver" : "eMoustOver",do { const ::mozilla::LogModule* moz_real_module = logModule;
 if ((__builtin_expect(!!(mozilla::detail::log_test(moz_real_module
, LogLevel::Info)), 0))) { mozilla::detail::log_print(moz_real_module
, LogLevel::Info, "Dispatching %s event to %s (%p)", isPointer
 ? "ePointerOver" : "eMoustOver", aContent ? ToString(*aContent
).c_str() : "nullptr", aContent); } } while (0)
5372           aContent ? ToString(*aContent).c_str() : "nullptr", aContent))do { const ::mozilla::LogModule* moz_real_module = logModule;
 if ((__builtin_expect(!!(mozilla::detail::log_test(moz_real_module
, LogLevel::Info)), 0))) { mozilla::detail::log_print(moz_real_module
, LogLevel::Info, "Dispatching %s event to %s (%p)", isPointer
 ? "ePointerOver" : "eMoustOver", aContent ? ToString(*aContent
).c_str() : "nullptr", aContent); } } while (0);
5373  nsCOMPtr<nsIWidget> targetWidget = DispatchMouseOrPointerBoundaryEvent(
5374      aMouseEvent, isPointer ? ePointerOver : eMouseOver, aContent,
5375      deepestLeaveEventTarget);
5376 
5377  MOZ_LOG(logModule, LogLevel::Info,do { const ::mozilla::LogModule* moz_real_module = logModule;
 if ((__builtin_expect(!!(mozilla::detail::log_test(moz_real_module
, LogLevel::Info)), 0))) { mozilla::detail::log_print(moz_real_module
, LogLevel::Info, "Dispatching %s event to %s (%p) and its ancestors"
, isPointer ? "ePointerEnter" : "eMouseEnter", aContent ? ToString
(*aContent).c_str() : "nullptr", aContent); } } while (0)
5378          ("Dispatching %s event to %s (%p) and its ancestors",do { const ::mozilla::LogModule* moz_real_module = logModule;
 if ((__builtin_expect(!!(mozilla::detail::log_test(moz_real_module
, LogLevel::Info)), 0))) { mozilla::detail::log_print(moz_real_module
, LogLevel::Info, "Dispatching %s event to %s (%p) and its ancestors"
, isPointer ? "ePointerEnter" : "eMouseEnter", aContent ? ToString
(*aContent).c_str() : "nullptr", aContent); } } while (0)
5379           isPointer ? "ePointerEnter" : "eMouseEnter",do { const ::mozilla::LogModule* moz_real_module = logModule;
 if ((__builtin_expect(!!(mozilla::detail::log_test(moz_real_module
, LogLevel::Info)), 0))) { mozilla::detail::log_print(moz_real_module
, LogLevel::Info, "Dispatching %s event to %s (%p) and its ancestors"
, isPointer ? "ePointerEnter" : "eMouseEnter", aContent ? ToString
(*aContent).c_str() : "nullptr", aContent); } } while (0)
5380           aContent ? ToString(*aContent).c_str() : "nullptr", aContent))do { const ::mozilla::LogModule* moz_real_module = logModule;
 if ((__builtin_expect(!!(mozilla::detail::log_test(moz_real_module
, LogLevel::Info)), 0))) { mozilla::detail::log_print(moz_real_module
, LogLevel::Info, "Dispatching %s event to %s (%p) and its ancestors"
, isPointer ? "ePointerEnter" : "eMouseEnter", aContent ? ToString
(*aContent).c_str() : "nullptr", aContent); } } while (0);
5381  enterDispatcher.Dispatch();
5382 
5383  MOZ_LOG(logModule, LogLevel::Info,do { const ::mozilla::LogModule* moz_real_module = logModule;
 if ((__builtin_expect(!!(mozilla::detail::log_test(moz_real_module
, LogLevel::Info)), 0))) { mozilla::detail::log_print(moz_real_module
, LogLevel::Info, "Dispatched \"over\" and \"enter\" events (the original \"over\" "
 "event target was in the document %p, and now in %p)", aContent
->GetComposedDoc(), mDocument.get()); } } while (0)
5384          ("Dispatched \"over\" and \"enter\" events (the original \"over\" "do { const ::mozilla::LogModule* moz_real_module = logModule;
 if ((__builtin_expect(!!(mozilla::detail::log_test(moz_real_module
, LogLevel::Info)), 0))) { mozilla::detail::log_print(moz_real_module
, LogLevel::Info, "Dispatched \"over\" and \"enter\" events (the original \"over\" "
 "event target was in the document %p, and now in %p)", aContent
->GetComposedDoc(), mDocument.get()); } } while (0)
5385           "event target was in the document %p, and now in %p)",do { const ::mozilla::LogModule* moz_real_module = logModule;
 if ((__builtin_expect(!!(mozilla::detail::log_test(moz_real_module
, LogLevel::Info)), 0))) { mozilla::detail::log_print(moz_real_module
, LogLevel::Info, "Dispatched \"over\" and \"enter\" events (the original \"over\" "
 "event target was in the document %p, and now in %p)", aContent
->GetComposedDoc(), mDocument.get()); } } while (0)
5386           aContent->GetComposedDoc(), mDocument.get()))do { const ::mozilla::LogModule* moz_real_module = logModule;
 if ((__builtin_expect(!!(mozilla::detail::log_test(moz_real_module
, LogLevel::Info)), 0))) { mozilla::detail::log_print(moz_real_module
, LogLevel::Info, "Dispatched \"over\" and \"enter\" events (the original \"over\" "
 "event target was in the document %p, and now in %p)", aContent
->GetComposedDoc(), mDocument.get()); } } while (0);
5387  wrapper->DidDispatchOverAndEnterEvent(
5388      aContent->GetComposedDoc() == mDocument ? aContent : nullptr,
5389      targetWidget);
5390}
5391 
5392// Returns the center point of the window's client area. This is
5393// in widget coordinates, i.e. relative to the widget's top-left
5394// corner, not in screen coordinates, the same units that UIEvent::
5395// refpoint is in. It may not be the exact center of the window if
5396// the platform requires rounding the coordinate.
5397static LayoutDeviceIntPoint GetWindowClientRectCenter(nsIWidget* aWidget) {
5398  NS_ENSURE_TRUE(aWidget, LayoutDeviceIntPoint(0, 0))do { if ((__builtin_expect(!!(!(aWidget)), 0))) { NS_DebugBreak
(NS_DEBUG_WARNING, "NS_ENSURE_TRUE(" "aWidget" ") failed", nullptr
, "/var/lib/jenkins/workspace/firefox-scan-build/dom/events/EventStateManager.cpp"
, 5398); return LayoutDeviceIntPoint(0, 0); } } while (false);
5399 
5400  LayoutDeviceIntRect rect = aWidget->GetClientBounds();
5401  LayoutDeviceIntPoint point(rect.width / 2, rect.height / 2);
5402  int32_t round = aWidget->RoundsWidgetCoordinatesTo();
5403  point.x = point.x / round * round;
5404  point.y = point.y / round * round;
5405  return point;
5406}
5407 
5408void EventStateManager::GeneratePointerEnterExit(EventMessage aMessage,
5409                                                 WidgetMouseEvent* aEvent) {
5410  WidgetPointerEvent pointerEvent(*aEvent);
5411  pointerEvent.mMessage = aMessage;
5412  GenerateMouseEnterExit(&pointerEvent);
5413}
5414 
5415/* static */
5416void EventStateManager::UpdateLastRefPointOfMouseEvent(
5417    WidgetMouseEvent* aMouseEvent) {
5418  if (aMouseEvent->mMessage != eMouseMove &&
5419      aMouseEvent->mMessage != ePointerMove) {
5420    return;
5421  }
5422 
5423  // Mouse movement is reported on the MouseEvent.movement{X,Y} fields.
5424  // Movement is calculated in UIEvent::GetMovementPoint() as:
5425  //   previous_mousemove_mRefPoint - current_mousemove_mRefPoint.
5426  if (PointerLockManager::IsLocked() && aMouseEvent->mWidget) {
5427    // The pointer is locked. If the pointer is not located at the center of
5428    // the window, dispatch a synthetic mousemove to return the pointer there.
5429    // Doing this between "real" pointer moves gives the impression that the
5430    // (locked) pointer can continue moving and won't stop at the screen
5431    // boundary. We cancel the synthetic event so that we don't end up
5432    // dispatching the centering move event to content.
5433    aMouseEvent->mLastRefPoint =
5434        GetWindowClientRectCenter(aMouseEvent->mWidget);
5435 
5436  } else if (sLastRefPoint == kInvalidRefPoint) {
5437    // We don't have a valid previous mousemove mRefPoint. This is either
5438    // the first move we've encountered, or the mouse has just re-entered
5439    // the application window. We should report (0,0) movement for this
5440    // case, so make the current and previous mRefPoints the same.
5441    aMouseEvent->mLastRefPoint = aMouseEvent->mRefPoint;
5442  } else {
5443    aMouseEvent->mLastRefPoint = sLastRefPoint;
5444  }
5445}
5446 
5447/* static */
5448void EventStateManager::ResetPointerToWindowCenterWhilePointerLocked(
5449    WidgetMouseEvent* aMouseEvent) {
5450  MOZ_ASSERT(PointerLockManager::IsLocked())do { static_assert( mozilla::detail::AssertionConditionType<
decltype(PointerLockManager::IsLocked())>::isValid, "invalid assertion condition"
); if ((__builtin_expect(!!(!(!!(PointerLockManager::IsLocked
()))), 0))) { do { } while (false); MOZ_ReportAssertionFailure
("PointerLockManager::IsLocked()", "/var/lib/jenkins/workspace/firefox-scan-build/dom/events/EventStateManager.cpp"
, 5450); AnnotateMozCrashReason("MOZ_ASSERT" "(" "PointerLockManager::IsLocked()"
 ")"); do { *((volatile int*)__null) = 5450; __attribute__((nomerge
)) ::abort(); } while (false); } } while (false);
5451  if ((aMouseEvent->mMessage != eMouseMove &&
5452       aMouseEvent->mMessage != ePointerMove) ||
5453      !aMouseEvent->mWidget) {
5454    return;
5455  }
5456 
5457  // We generate pointermove from mousemove event, so only synthesize native
5458  // mouse move and update sSynthCenteringPoint by mousemove event.
5459  bool updateSynthCenteringPoint = aMouseEvent->mMessage == eMouseMove;
5460 
5461  // The pointer is locked. If the pointer is not located at the center of
5462  // the window, dispatch a synthetic mousemove to return the pointer there.
5463  // Doing this between "real" pointer moves gives the impression that the
5464  // (locked) pointer can continue moving and won't stop at the screen
5465  // boundary. We cancel the synthetic event so that we don't end up
5466  // dispatching the centering move event to content.
5467  LayoutDeviceIntPoint center = GetWindowClientRectCenter(aMouseEvent->mWidget);
5468 
5469  if (aMouseEvent->mRefPoint != center && updateSynthCenteringPoint) {
5470    // Mouse move doesn't finish at the center of the window. Dispatch a
5471    // synthetic native mouse event to move the pointer back to the center
5472    // of the window, to faciliate more movement. But first, record that
5473    // we've dispatched a synthetic mouse movement, so we can cancel it
5474    // in the other branch here.
5475    sSynthCenteringPoint = center;
5476    // XXX Once we fix XXX comments in SetPointerLock about this API, we could
5477    //     restrict that this API works only in the automation mode or in the
5478    //     pointer locked situation.
5479    aMouseEvent->mWidget->SynthesizeNativeMouseMove(
5480        center + aMouseEvent->mWidget->WidgetToScreenOffset(), nullptr);
5481  } else if (aMouseEvent->mRefPoint == sSynthCenteringPoint) {
5482    // This is the "synthetic native" event we dispatched to re-center the
5483    // pointer. Cancel it so we don't expose the centering move to content.
5484    aMouseEvent->StopPropagation();
5485    // Clear sSynthCenteringPoint so we don't cancel other events
5486    // targeted at the center.
5487    if (updateSynthCenteringPoint) {
5488      sSynthCenteringPoint = kInvalidRefPoint;
5489    }
5490  }
5491}
5492 
5493/* static */
5494void EventStateManager::UpdateLastPointerPosition(
5495    WidgetMouseEvent* aMouseEvent) {
5496  if (aMouseEvent->mMessage != eMouseMove) {
5497    return;
5498  }
5499  sLastRefPoint = aMouseEvent->mRefPoint;
5500}
5501 
5502void EventStateManager::GenerateMouseEnterExit(WidgetMouseEvent* aMouseEvent) {
5503  EnsureDocument(mPresContext);
5504  if (!mDocument) return;
5505 
5506  // Hold onto old target content through the event and reset after.
5507  nsCOMPtr<nsIContent> targetBeforeEvent = mCurrentTargetContent;
5508 
5509  switch (aMouseEvent->mMessage) {
5510    case eMouseMove:
5511    case ePointerMove:
5512    case ePointerDown:
5513    case ePointerGotCapture: {
5514      // Get the target content target (mousemove target == mouseover target)
5515      nsCOMPtr<nsIContent> targetElement = GetEventTargetContent(aMouseEvent);
5516      if (!targetElement) {
5517        // We're always over the document root, even if we're only
5518        // over dead space in a page (whose frame is not associated with
5519        // any content) or in print preview dead space
5520        targetElement = mDocument->GetRootElement();
5521      }
5522      if (targetElement) {
5523        NotifyMouseOver(aMouseEvent, targetElement);
5524      }
5525      break;
5526    }
5527    case ePointerUp: {
5528      if (!StaticPrefs::
5529              dom_events_mouse_pointer_boundary_keep_enter_targets_after_over_target_removed()) {
5530        // In the legacy mode, we should do nothing if the event has not been
5531        // dispatched yet (i.e., called by PreHandleEvent).
5532        // On the other hand, if the event was dispatched (i.e., called by
5533        // PostEventHandler), we need to dispatch "pointerout" and
5534        // "pointerleave" events because the pointer will be removed
5535        // (invalidated) by the "pointerup" operation.
5536        if (!aMouseEvent->mFlags.mDispatchedAtLeastOnce) {
5537          break;
5538        }
5539        MOZ_ASSERT(!aMouseEvent->InputSourceSupportsHover())do { static_assert( mozilla::detail::AssertionConditionType<
decltype(!aMouseEvent->InputSourceSupportsHover())>::isValid
, "invalid assertion condition"); if ((__builtin_expect(!!(!(
!!(!aMouseEvent->InputSourceSupportsHover()))), 0))) { do {
 } while (false); MOZ_ReportAssertionFailure("!aMouseEvent->InputSourceSupportsHover()"
, "/var/lib/jenkins/workspace/firefox-scan-build/dom/events/EventStateManager.cpp"
, 5539); AnnotateMozCrashReason("MOZ_ASSERT" "(" "!aMouseEvent->InputSourceSupportsHover()"
 ")"); do { *((volatile int*)__null) = 5539; __attribute__((nomerge
)) ::abort(); } while (false); } } while (false);
5540        // Get the target content target (pointermove target == pointerover
5541        // target)
5542        nsCOMPtr<nsIContent> targetElement = GetEventTargetContent(aMouseEvent);
5543        if (!targetElement) {
5544          // We're always over the document root, even if we're only
5545          // over dead space in a page (whose frame is not associated with
5546          // any content) or in print preview dead space
5547          targetElement = mDocument->GetRootElement();
5548        }
5549        if (targetElement) {
5550          // XXX It's odd to override the `pointerout` event target with the
5551          // content under the pointer or something because it may have never
5552          // received `pointerover` event.  I think that this was required for
5553          // digitizer which supports hover state (bug 985511).  However, this
5554          // is now not called at ePointerUp if the device supports hover.
5555          RefPtr<OverOutElementsWrapper> helper =
5556              GetWrapperByEventID(aMouseEvent);
5557          if (helper) {
5558            helper->OverrideOverEventTarget(targetElement);
5559          }
5560          NotifyMouseOut(aMouseEvent, nullptr);
5561        }
5562        break;
5563      }
5564 
5565      if (aMouseEvent->mFlags.mDispatchedAtLeastOnce) {
5566        // If we've already dispatched the pointerup event caused by
5567        // non-hoverable input device like touch, we need to synthesize
5568        // pointerout and pointerleave events because the poiner is valid only
5569        // while it's "down".
5570        if (!aMouseEvent->InputSourceSupportsHover()) {
5571          NotifyMouseOut(aMouseEvent, nullptr);
5572        }
5573        break;
5574      }
5575 
5576      // If we're going to dispatch the pointerup event and the element under
5577      // the pointer is changed from the previous pointer event dispatching, we
5578      // need to dispatch pointer boundary events.  If the pointing device is
5579      // hoverable, we always need to do it.  Otherwise, an element captures the
5580      // pointer by default.  If so, we don't need the boundary events, but if
5581      // the capture has already been released, e.g., by the capturing element
5582      // is removed, we need to dispatch the pointer boundary event the same
5583      // way as with hoverable pointer.
5584      if (aMouseEvent->InputSourceSupportsHover() ||
5585          !PointerEventHandler::GetPointerCapturingElement(
5586              aMouseEvent->pointerId)) {
5587        nsCOMPtr<nsIContent> targetElement = GetEventTargetContent(aMouseEvent);
5588        if (!targetElement) {
5589          targetElement = mDocument->GetRootElement();
5590        }
5591        if (targetElement) {
5592          NotifyMouseOver(aMouseEvent, targetElement);
5593        }
5594        break;
5595      }
5596      break;
5597    }
5598    case ePointerLeave:
5599    case ePointerCancel:
5600    case eMouseExitFromWidget: {
5601      // This is actually the window mouse exit or pointer leave event. We're
5602      // not moving into any new element.
5603 
5604      RefPtr<OverOutElementsWrapper> helper = GetWrapperByEventID(aMouseEvent);
5605      if (helper) {
5606        nsCOMPtr<nsIWidget> lastOverWidget = helper->GetLastOverWidget();
5607        if (lastOverWidget &&
5608            nsContentUtils::GetTopLevelWidget(aMouseEvent->mWidget) !=
5609                nsContentUtils::GetTopLevelWidget(lastOverWidget)) {
5610          // the Mouse/PointerOut event widget doesn't have same top widget with
5611          // the last over event target, it's a spurious event for the frame for
5612          // the target.
5613          break;
5614        }
5615      }
5616 
5617      // Reset sLastRefPoint, so that we'll know not to report any
5618      // movement the next time we re-enter the window.
5619      sLastRefPoint = kInvalidRefPoint;
5620 
5621      NotifyMouseOut(aMouseEvent, nullptr);
5622      break;
5623    }
5624    default:
5625      break;
5626  }
5627 
5628  // reset mCurretTargetContent to what it was
5629  mCurrentTargetContent = targetBeforeEvent;
5630}
5631 
5632OverOutElementsWrapper* EventStateManager::GetWrapperByEventID(
5633    WidgetMouseEvent* aEvent) {
5634  WidgetPointerEvent* pointer = aEvent->AsPointerEvent();
5635  if (!pointer) {
5636    MOZ_ASSERT(aEvent->AsMouseEvent() != nullptr)do { static_assert( mozilla::detail::AssertionConditionType<
decltype(aEvent->AsMouseEvent() != nullptr)>::isValid, "invalid assertion condition"
); if ((__builtin_expect(!!(!(!!(aEvent->AsMouseEvent() !=
 nullptr))), 0))) { do { } while (false); MOZ_ReportAssertionFailure
("aEvent->AsMouseEvent() != nullptr", "/var/lib/jenkins/workspace/firefox-scan-build/dom/events/EventStateManager.cpp"
, 5636); AnnotateMozCrashReason("MOZ_ASSERT" "(" "aEvent->AsMouseEvent() != nullptr"
 ")"); do { *((volatile int*)__null) = 5636; __attribute__((nomerge
)) ::abort(); } while (false); } } while (false);
5637    if (!mMouseEnterLeaveHelper) {
5638      mMouseEnterLeaveHelper = new OverOutElementsWrapper(
5639          OverOutElementsWrapper::BoundaryEventType::Mouse);
5640    }
5641    return mMouseEnterLeaveHelper;
5642  }
5643  return mPointersEnterLeaveHelper.GetOrInsertNew(
5644      pointer->pointerId, OverOutElementsWrapper::BoundaryEventType::Pointer);
5645}
5646 
5647/* static */
5648void EventStateManager::SetPointerLock(nsIWidget* aWidget,
5649                                       nsPresContext* aPresContext) {
5650  // Reset mouse wheel transaction
5651  WheelTransaction::EndTransaction();
5652 
5653  // Deal with DnD events
5654  nsCOMPtr<nsIDragService> dragService =
5655      do_GetService("@mozilla.org/widget/dragservice;1");
5656 
5657  if (PointerLockManager::IsLocked()) {
5658    MOZ_ASSERT(aWidget, "Locking pointer requires a widget")do { static_assert( mozilla::detail::AssertionConditionType<
decltype(aWidget)>::isValid, "invalid assertion condition"
); if ((__builtin_expect(!!(!(!!(aWidget))), 0))) { do { } while
 (false); MOZ_ReportAssertionFailure("aWidget" " (" "Locking pointer requires a widget"
 ")", "/var/lib/jenkins/workspace/firefox-scan-build/dom/events/EventStateManager.cpp"
, 5658); AnnotateMozCrashReason("MOZ_ASSERT" "(" "aWidget" ") ("
 "Locking pointer requires a widget" ")"); do { *((volatile int
*)__null) = 5658; __attribute__((nomerge)) ::abort(); } while
 (false); } } while (false);
5659    MOZ_ASSERT(aPresContext, "Locking pointer requires a presContext")do { static_assert( mozilla::detail::AssertionConditionType<
decltype(aPresContext)>::isValid, "invalid assertion condition"
); if ((__builtin_expect(!!(!(!!(aPresContext))), 0))) { do {
 } while (false); MOZ_ReportAssertionFailure("aPresContext" " ("
 "Locking pointer requires a presContext" ")", "/var/lib/jenkins/workspace/firefox-scan-build/dom/events/EventStateManager.cpp"
, 5659); AnnotateMozCrashReason("MOZ_ASSERT" "(" "aPresContext"
 ") (" "Locking pointer requires a presContext" ")"); do { *(
(volatile int*)__null) = 5659; __attribute__((nomerge)) ::abort
(); } while (false); } } while (false);
5660 
5661    // Release all pointer capture when a pointer lock is successfully applied
5662    // on an element.
5663    PointerEventHandler::ReleaseAllPointerCapture();
5664 
5665    // Store the last known ref point so we can reposition the pointer after
5666    // unlock.
5667    sPreLockScreenPoint = LayoutDeviceIntPoint::Round(
5668        sLastScreenPoint * aPresContext->CSSToDevPixelScale());
5669 
5670    // Fire a synthetic mouse move to ensure event state is updated. We first
5671    // set the mouse to the center of the window, so that the mouse event
5672    // doesn't report any movement.
5673    // XXX Cannot we do synthesize the native mousemove in the parent process
5674    //     with calling LockNativePointer below?  Then, we could make this API
5675    //     work only in the automation mode.
5676    sLastRefPoint = GetWindowClientRectCenter(aWidget);
5677    aWidget->SynthesizeNativeMouseMove(
5678        sLastRefPoint + aWidget->WidgetToScreenOffset(), nullptr);
5679 
5680    // Suppress DnD
5681    if (dragService) {
5682      dragService->Suppress();
5683    }
5684 
5685    // Activate native pointer lock on platforms where it is required (Wayland)
5686    aWidget->LockNativePointer();
5687  } else {
5688    if (aWidget) {
5689      // Deactivate native pointer lock on platforms where it is required
5690      aWidget->UnlockNativePointer();
5691    }
5692 
5693    // Reset SynthCenteringPoint to invalid so that next time we start
5694    // locking pointer, it has its initial value.
5695    sSynthCenteringPoint = kInvalidRefPoint;
5696    if (aWidget) {
5697      // Unlocking, so return pointer to the original position by firing a
5698      // synthetic mouse event. We first reset sLastRefPoint to its
5699      // pre-pointerlock position, so that the synthetic mouse event reports
5700      // no movement.
5701      sLastRefPoint = sPreLockScreenPoint - aWidget->WidgetToScreenOffset();
5702      // XXX Cannot we do synthesize the native mousemove in the parent process
5703      //     with calling `UnlockNativePointer` above?  Then, we could make this
5704      //     API work only in the automation mode.
5705      aWidget->SynthesizeNativeMouseMove(sPreLockScreenPoint, nullptr);
5706    }
5707 
5708    // Unsuppress DnD
5709    if (dragService) {
5710      dragService->Unsuppress();
5711    }
5712  }
5713}
5714 
5715void EventStateManager::GenerateDragDropEnterExit(nsPresContext* aPresContext,
5716                                                  WidgetDragEvent* aDragEvent) {
5717  // Hold onto old target content through the event and reset after.
5718  nsCOMPtr<nsIContent> targetBeforeEvent = mCurrentTargetContent;
5719 
5720  switch (aDragEvent->mMessage) {
5721    case eDragOver: {
5722      // when dragging from one frame to another, events are fired in the
5723      // order: dragexit, dragenter, dragleave
5724      if (sLastDragOverFrame != mCurrentTarget) {
5725        // We'll need the content, too, to check if it changed separately from
5726        // the frames.
5727        nsCOMPtr<nsIContent> lastContent;
5728        nsCOMPtr<nsIContent> targetContent;
5729        mCurrentTarget->GetContentForEvent(aDragEvent,
5730                                           getter_AddRefs(targetContent));
5731        if (targetContent && targetContent->IsText()) {
5732          targetContent = targetContent->GetFlattenedTreeParent();
5733        }
5734 
5735        if (sLastDragOverFrame) {
5736          // The frame has changed but the content may not have. Check before
5737          // dispatching to content
5738          sLastDragOverFrame->GetContentForEvent(aDragEvent,
5739                                                 getter_AddRefs(lastContent));
5740          if (lastContent && lastContent->IsText()) {
5741            lastContent = lastContent->GetFlattenedTreeParent();
5742          }
5743 
5744          RefPtr<nsPresContext> presContext = sLastDragOverFrame->PresContext();
5745          FireDragEnterOrExit(presContext, aDragEvent, eDragExit, targetContent,
5746                              lastContent, sLastDragOverFrame);
5747          nsIContent* target = sLastDragOverFrame
5748                                   ? sLastDragOverFrame.GetFrame()->GetContent()
5749                                   : nullptr;
5750          // XXXedgar, look like we need to consider fission OOP iframe, too.
5751          if (IsTopLevelRemoteTarget(target)) {
5752            // Dragging something and moving from web content to chrome only
5753            // fires dragexit and dragleave to xul:browser. We have to forward
5754            // dragexit to sLastDragOverFrame when its content is a remote
5755            // target. We don't forward dragleave since it's generated from
5756            // dragexit.
5757            WidgetDragEvent remoteEvent(aDragEvent->IsTrusted(), eDragExit,
5758                                        aDragEvent->mWidget);
5759            remoteEvent.AssignDragEventData(*aDragEvent, true);
5760            remoteEvent.mFlags.mIsSynthesizedForTests =
5761                aDragEvent->mFlags.mIsSynthesizedForTests;
5762            nsEventStatus remoteStatus = nsEventStatus_eIgnore;
5763            HandleCrossProcessEvent(&remoteEvent, &remoteStatus);
5764          }
5765        }
5766 
5767        AutoWeakFrame currentTraget = mCurrentTarget;
5768        FireDragEnterOrExit(aPresContext, aDragEvent, eDragEnter, lastContent,
5769                            targetContent, currentTraget);
5770 
5771        if (sLastDragOverFrame) {
5772          RefPtr<nsPresContext> presContext = sLastDragOverFrame->PresContext();
5773          FireDragEnterOrExit(presContext, aDragEvent, eDragLeave,
5774                              targetContent, lastContent, sLastDragOverFrame);
5775        }
5776 
5777        sLastDragOverFrame = mCurrentTarget;
5778      }
5779    } break;
5780 
5781    case eDragExit: {
5782      // This is actually the window mouse exit event.
5783      if (sLastDragOverFrame) {
5784        nsCOMPtr<nsIContent> lastContent;
5785        sLastDragOverFrame->GetContentForEvent(aDragEvent,
5786                                               getter_AddRefs(lastContent));
5787 
5788        RefPtr<nsPresContext> lastDragOverFramePresContext =
5789            sLastDragOverFrame->PresContext();
5790        FireDragEnterOrExit(lastDragOverFramePresContext, aDragEvent, eDragExit,
5791                            nullptr, lastContent, sLastDragOverFrame);
5792        FireDragEnterOrExit(lastDragOverFramePresContext, aDragEvent,
5793                            eDragLeave, nullptr, lastContent,
5794                            sLastDragOverFrame);
5795 
5796        sLastDragOverFrame = nullptr;
5797      }
5798    } break;
5799 
5800    default:
5801      break;
5802  }
5803 
5804  // reset mCurretTargetContent to what it was
5805  mCurrentTargetContent = targetBeforeEvent;
5806 
5807  // Now flush all pending notifications, for better responsiveness.
5808  FlushLayout(aPresContext);
5809}
5810 
5811void EventStateManager::FireDragEnterOrExit(nsPresContext* aPresContext,
5812                                            WidgetDragEvent* aDragEvent,
5813                                            EventMessage aMessage,
5814                                            nsIContent* aRelatedTarget,
5815                                            nsIContent* aTargetContent,
5816                                            AutoWeakFrame& aTargetFrame) {
5817  MOZ_ASSERT(aMessage == eDragLeave || aMessage == eDragExit ||do { static_assert( mozilla::detail::AssertionConditionType<
decltype(aMessage == eDragLeave || aMessage == eDragExit || aMessage
 == eDragEnter)>::isValid, "invalid assertion condition");
 if ((__builtin_expect(!!(!(!!(aMessage == eDragLeave || aMessage
 == eDragExit || aMessage == eDragEnter))), 0))) { do { } while
 (false); MOZ_ReportAssertionFailure("aMessage == eDragLeave || aMessage == eDragExit || aMessage == eDragEnter"
, "/var/lib/jenkins/workspace/firefox-scan-build/dom/events/EventStateManager.cpp"
, 5818); AnnotateMozCrashReason("MOZ_ASSERT" "(" "aMessage == eDragLeave || aMessage == eDragExit || aMessage == eDragEnter"
 ")"); do { *((volatile int*)__null) = 5818; __attribute__((nomerge
)) ::abort(); } while (false); } } while (false)
5818             aMessage == eDragEnter)do { static_assert( mozilla::detail::AssertionConditionType<
decltype(aMessage == eDragLeave || aMessage == eDragExit || aMessage
 == eDragEnter)>::isValid, "invalid assertion condition");
 if ((__builtin_expect(!!(!(!!(aMessage == eDragLeave || aMessage
 == eDragExit || aMessage == eDragEnter))), 0))) { do { } while
 (false); MOZ_ReportAssertionFailure("aMessage == eDragLeave || aMessage == eDragExit || aMessage == eDragEnter"
, "/var/lib/jenkins/workspace/firefox-scan-build/dom/events/EventStateManager.cpp"
, 5818); AnnotateMozCrashReason("MOZ_ASSERT" "(" "aMessage == eDragLeave || aMessage == eDragExit || aMessage == eDragEnter"
 ")"); do { *((volatile int*)__null) = 5818; __attribute__((nomerge
)) ::abort(); } while (false); } } while (false);
5819  nsEventStatus status = nsEventStatus_eIgnore;
5820  WidgetDragEvent event(aDragEvent->IsTrusted(), aMessage, aDragEvent->mWidget);
5821  event.AssignDragEventData(*aDragEvent, false);
5822  event.mFlags.mIsSynthesizedForTests =
5823      aDragEvent->mFlags.mIsSynthesizedForTests;
5824  event.mRelatedTarget = aRelatedTarget;
5825  if (aMessage == eDragExit && !StaticPrefs::dom_event_dragexit_enabled()) {
5826    event.mFlags.mOnlyChromeDispatch = true;
5827  }
5828 
5829  mCurrentTargetContent = aTargetContent;
5830 
5831  if (aTargetContent != aRelatedTarget) {
5832    // XXX This event should still go somewhere!!
5833    if (aTargetContent) {
5834      EventDispatcher::Dispatch(aTargetContent, aPresContext, &event, nullptr,
5835                                &status);
5836    }
5837 
5838    // adjust the drag hover if the dragenter event was cancelled or this is a
5839    // drag exit
5840    if (status == nsEventStatus_eConsumeNoDefault || aMessage == eDragExit) {
5841      SetContentState((aMessage == eDragEnter) ? aTargetContent : nullptr,
5842                      ElementState::DRAGOVER);
5843    }
5844 
5845    // collect any changes to moz cursor settings stored in the event's
5846    // data transfer.
5847    UpdateDragDataTransfer(&event);
5848  }
5849 
5850  // Finally dispatch the event to the frame
5851  if (aTargetFrame) {
5852    aTargetFrame->HandleEvent(aPresContext, &event, &status);
5853  }
5854}
5855 
5856void EventStateManager::UpdateDragDataTransfer(WidgetDragEvent* dragEvent) {
5857  NS_ASSERTION(dragEvent, "drag event is null in UpdateDragDataTransfer!")do { if (!(dragEvent)) { NS_DebugBreak(NS_DEBUG_ASSERTION, "drag event is null in UpdateDragDataTransfer!"
, "dragEvent", "/var/lib/jenkins/workspace/firefox-scan-build/dom/events/EventStateManager.cpp"
, 5857); MOZ_PretendNoReturn(); } } while (0);
5858  if (!dragEvent->mDataTransfer) {
5859    return;
5860  }
5861 
5862  nsCOMPtr<nsIDragSession> dragSession =
5863      nsContentUtils::GetDragSession(mPresContext);
5864 
5865  if (dragSession) {
5866    // the initial dataTransfer is the one from the dragstart event that
5867    // was set on the dragSession when the drag began.
5868    RefPtr<DataTransfer> initialDataTransfer = dragSession->GetDataTransfer();
5869    if (initialDataTransfer) {
5870      // retrieve the current moz cursor setting and save it.
5871      nsAutoString mozCursor;
5872      dragEvent->mDataTransfer->GetMozCursor(mozCursor);
5873      initialDataTransfer->SetMozCursor(mozCursor);
5874    }
5875  }
5876}
5877 
5878nsresult EventStateManager::SetClickCount(WidgetMouseEvent* aEvent,
5879                                          nsEventStatus* aStatus,
5880                                          nsIContent* aOverrideClickTarget) {
5881  nsCOMPtr<nsIContent> mouseContent = aOverrideClickTarget;
5882  if (!mouseContent && mCurrentTarget) {
5883    mCurrentTarget->GetContentForEvent(aEvent, getter_AddRefs(mouseContent));
5884  }
5885  if (mouseContent && mouseContent->IsText()) {
5886    nsINode* parent = mouseContent->GetFlattenedTreeParentNode();
5887    if (parent && parent->IsContent()) {
5888      mouseContent = parent->AsContent();
5889    }
5890  }
5891 
5892  LastMouseDownInfo& mouseDownInfo = GetLastMouseDownInfo(aEvent->mButton);
5893  if (aEvent->mMessage == eMouseDown) {
5894    mouseDownInfo.mLastMouseDownContent =
5895        !aEvent->mClickEventPrevented ? mouseContent : nullptr;
5896 
5897    if (mouseDownInfo.mLastMouseDownContent) {
5898      if (HTMLInputElement* input = HTMLInputElement::FromNodeOrNull(
5899              mouseDownInfo.mLastMouseDownContent)) {
5900        mouseDownInfo.mLastMouseDownInputControlType =
5901            Some(input->ControlType());
5902      } else if (mouseDownInfo.mLastMouseDownContent
5903                     ->IsInNativeAnonymousSubtree()) {
5904        if (HTMLInputElement* input = HTMLInputElement::FromNodeOrNull(
5905                mouseDownInfo.mLastMouseDownContent
5906                    ->GetFlattenedTreeParent())) {
5907          mouseDownInfo.mLastMouseDownInputControlType =
5908              Some(input->ControlType());
5909        }
5910      }
5911    }
5912  } else {
5913    aEvent->mClickTarget =
5914        !aEvent->mClickEventPrevented
5915            ? GetCommonAncestorForMouseUp(
5916                  mouseContent, mouseDownInfo.mLastMouseDownContent,
5917                  mouseDownInfo.mLastMouseDownInputControlType)
5918            : nullptr;
5919    if (aEvent->mClickTarget) {
5920      aEvent->mClickCount = mouseDownInfo.mClickCount;
5921      mouseDownInfo.mClickCount = 0;
5922    } else {
5923      aEvent->mClickCount = 0;
5924    }
5925    mouseDownInfo.mLastMouseDownContent = nullptr;
5926    mouseDownInfo.mLastMouseDownInputControlType = Nothing();
5927  }
5928 
5929  return NS_OK;
5930}
5931 
5932// static
5933bool EventStateManager::EventCausesClickEvents(
5934    const WidgetMouseEvent& aMouseEvent) {
5935  if (NS_WARN_IF(aMouseEvent.mMessage != eMouseUp)NS_warn_if_impl(aMouseEvent.mMessage != eMouseUp, "aMouseEvent.mMessage != eMouseUp"
, "/var/lib/jenkins/workspace/firefox-scan-build/dom/events/EventStateManager.cpp"
, 5935)) {
5936    return false;
5937  }
5938  // If the mouseup event is synthesized event, we don't need to dispatch
5939  // click events.
5940  if (!aMouseEvent.IsReal()) {
5941    return false;
5942  }
5943  // If mouse is still over same element, clickcount will be > 1.
5944  // If it has moved it will be zero, so no click.
5945  if (!aMouseEvent.mClickCount || !aMouseEvent.mClickTarget) {
5946    return false;
5947  }
5948  // If click event was explicitly prevented, we shouldn't dispatch it.
5949  if (aMouseEvent.mClickEventPrevented) {
5950    return false;
5951  }
5952  // Check that the window isn't disabled before firing a click
5953  // (see bug 366544).
5954  return !(aMouseEvent.mWidget && !aMouseEvent.mWidget->IsEnabled());
5955}
5956 
5957nsresult EventStateManager::InitAndDispatchClickEvent(
5958    WidgetMouseEvent* aMouseUpEvent, nsEventStatus* aStatus,
5959    EventMessage aMessage, PresShell* aPresShell, nsIContent* aMouseUpContent,
5960    AutoWeakFrame aCurrentTarget, bool aNoContentDispatch,
5961    nsIContent* aOverrideClickTarget) {
5962  MOZ_ASSERT(aMouseUpEvent)do { static_assert( mozilla::detail::AssertionConditionType<
decltype(aMouseUpEvent)>::isValid, "invalid assertion condition"
); if ((__builtin_expect(!!(!(!!(aMouseUpEvent))), 0))) { do {
 } while (false); MOZ_ReportAssertionFailure("aMouseUpEvent",
 "/var/lib/jenkins/workspace/firefox-scan-build/dom/events/EventStateManager.cpp"
, 5962); AnnotateMozCrashReason("MOZ_ASSERT" "(" "aMouseUpEvent"
 ")"); do { *((volatile int*)__null) = 5962; __attribute__((nomerge
)) ::abort(); } while (false); } } while (false);
16
←
Taking false branch→
17
←
Loop condition is false.  Exiting loop→
5963  MOZ_ASSERT(EventCausesClickEvents(*aMouseUpEvent))do { static_assert( mozilla::detail::AssertionConditionType<
decltype(EventCausesClickEvents(*aMouseUpEvent))>::isValid
, "invalid assertion condition"); if ((__builtin_expect(!!(!(
!!(EventCausesClickEvents(*aMouseUpEvent)))), 0))) { do { } while
 (false); MOZ_ReportAssertionFailure("EventCausesClickEvents(*aMouseUpEvent)"
, "/var/lib/jenkins/workspace/firefox-scan-build/dom/events/EventStateManager.cpp"
, 5963); AnnotateMozCrashReason("MOZ_ASSERT" "(" "EventCausesClickEvents(*aMouseUpEvent)"
 ")"); do { *((volatile int*)__null) = 5963; __attribute__((nomerge
)) ::abort(); } while (false); } } while (false);
18
←
Taking false branch→
19
←
Loop condition is false.  Exiting loop→
5964  MOZ_ASSERT(aMouseUpContent || aCurrentTarget || aOverrideClickTarget)do { static_assert( mozilla::detail::AssertionConditionType<
decltype(aMouseUpContent || aCurrentTarget || aOverrideClickTarget
)>::isValid, "invalid assertion condition"); if ((__builtin_expect
(!!(!(!!(aMouseUpContent || aCurrentTarget || aOverrideClickTarget
))), 0))) { do { } while (false); MOZ_ReportAssertionFailure(
"aMouseUpContent || aCurrentTarget || aOverrideClickTarget", "/var/lib/jenkins/workspace/firefox-scan-build/dom/events/EventStateManager.cpp"
, 5964); AnnotateMozCrashReason("MOZ_ASSERT" "(" "aMouseUpContent || aCurrentTarget || aOverrideClickTarget"
 ")"); do { *((volatile int*)__null) = 5964; __attribute__((nomerge
)) ::abort(); } while (false); } } while (false);
20
←
Taking false branch→
21
←
Loop condition is false.  Exiting loop→
5965 
5966  Maybe<WidgetPointerEvent> pointerEvent;
5967  Maybe<WidgetMouseEvent> mouseEvent;
22
←
Calling defaulted default constructor for 'Maybe<mozilla::WidgetMouseEvent>'→
33
←
Returning from default constructor for 'Maybe<mozilla::WidgetMouseEvent>'→
5968  if (IsPointerEventMessage(aMessage)) {
34
←
Assuming the condition is true→
35
←
Taking true branch→
5969    pointerEvent.emplace(aMouseUpEvent->IsTrusted(), aMessage,
5970                         aMouseUpEvent->mWidget);
5971  } else {
5972    mouseEvent.emplace(aMouseUpEvent->IsTrusted(), aMessage,
5973                       aMouseUpEvent->mWidget, WidgetMouseEvent::eReal);
5974  }
5975 
5976  WidgetMouseEvent& mouseOrPointerEvent =
5977      pointerEvent.isSome() ? pointerEvent.ref() : mouseEvent.ref();
36
←
'?' condition is true→
5978 
5979  mouseOrPointerEvent.mRefPoint = aMouseUpEvent->mRefPoint;
5980  mouseOrPointerEvent.mClickCount = aMouseUpEvent->mClickCount;
5981  mouseOrPointerEvent.mModifiers = aMouseUpEvent->mModifiers;
5982  mouseOrPointerEvent.mButtons = aMouseUpEvent->mButtons;
5983  mouseOrPointerEvent.mTimeStamp = aMouseUpEvent->mTimeStamp;
5984  mouseOrPointerEvent.mFlags.mOnlyChromeDispatch = aNoContentDispatch;
5985  mouseOrPointerEvent.mFlags.mNoContentDispatch = aNoContentDispatch;
5986  mouseOrPointerEvent.mButton = aMouseUpEvent->mButton;
5987  mouseOrPointerEvent.pointerId = aMouseUpEvent->pointerId;
5988  mouseOrPointerEvent.mInputSource = aMouseUpEvent->mInputSource;
5989  nsIContent* target = aMouseUpContent;
5990  nsIFrame* targetFrame = aCurrentTarget;
5991  if (aOverrideClickTarget) {
37
←
Assuming 'aOverrideClickTarget' is null→
38
←
Taking false branch→
5992    target = aOverrideClickTarget;
5993    targetFrame = aOverrideClickTarget->GetPrimaryFrame();
5994  }
5995 
5996  if (!target->IsInComposedDoc()) {
39
←
Assuming the condition is true→
40
←
Taking true branch→
5997    return NS_OK;
41
←
Calling implicit destructor for 'Maybe<mozilla::WidgetMouseEvent>'→
42
←
Calling '~MaybeStorage'→
5998  }
5999 
6000  // Use local event status for each click event dispatching since it'll be
6001  // cleared by EventStateManager::PreHandleEvent().  Therefore, dispatching
6002  // an event means that previous event status will be ignored.
6003  nsEventStatus status = nsEventStatus_eIgnore;
6004  nsresult rv = aPresShell->HandleEventWithTarget(
6005      &mouseOrPointerEvent, targetFrame, MOZ_KnownLive(target)(target), &status);
6006 
6007  // Copy mMultipleActionsPrevented flag from a click event to the mouseup
6008  // event only when it's set to true.  It may be set to true if an editor has
6009  // already handled it.  This is important to avoid two or more default
6010  // actions handled here.
6011  aMouseUpEvent->mFlags.mMultipleActionsPrevented |=
6012      mouseOrPointerEvent.mFlags.mMultipleActionsPrevented;
6013  // If current status is nsEventStatus_eConsumeNoDefault, we don't need to
6014  // overwrite it.
6015  if (*aStatus == nsEventStatus_eConsumeNoDefault) {
6016    return rv;
6017  }
6018  // If new status is nsEventStatus_eConsumeNoDefault or
6019  // nsEventStatus_eConsumeDoDefault, use it.
6020  if (status == nsEventStatus_eConsumeNoDefault ||
6021      status == nsEventStatus_eConsumeDoDefault) {
6022    *aStatus = status;
6023    return rv;
6024  }
6025  // Otherwise, keep the original status.
6026  return rv;
6027}
6028 
6029nsresult EventStateManager::PostHandleMouseUp(
6030    WidgetMouseEvent* aMouseUpEvent, nsEventStatus* aStatus,
6031    nsIContent* aOverrideClickTarget) {
6032  MOZ_ASSERT(aMouseUpEvent)do { static_assert( mozilla::detail::AssertionConditionType<
decltype(aMouseUpEvent)>::isValid, "invalid assertion condition"
); if ((__builtin_expect(!!(!(!!(aMouseUpEvent))), 0))) { do {
 } while (false); MOZ_ReportAssertionFailure("aMouseUpEvent",
 "/var/lib/jenkins/workspace/firefox-scan-build/dom/events/EventStateManager.cpp"
, 6032); AnnotateMozCrashReason("MOZ_ASSERT" "(" "aMouseUpEvent"
 ")"); do { *((volatile int*)__null) = 6032; __attribute__((nomerge
)) ::abort(); } while (false); } } while (false);
6033  MOZ_ASSERT(EventCausesClickEvents(*aMouseUpEvent))do { static_assert( mozilla::detail::AssertionConditionType<
decltype(EventCausesClickEvents(*aMouseUpEvent))>::isValid
, "invalid assertion condition"); if ((__builtin_expect(!!(!(
!!(EventCausesClickEvents(*aMouseUpEvent)))), 0))) { do { } while
 (false); MOZ_ReportAssertionFailure("EventCausesClickEvents(*aMouseUpEvent)"
, "/var/lib/jenkins/workspace/firefox-scan-build/dom/events/EventStateManager.cpp"
, 6033); AnnotateMozCrashReason("MOZ_ASSERT" "(" "EventCausesClickEvents(*aMouseUpEvent)"
 ")"); do { *((volatile int*)__null) = 6033; __attribute__((nomerge
)) ::abort(); } while (false); } } while (false);
6034  MOZ_ASSERT(aStatus)do { static_assert( mozilla::detail::AssertionConditionType<
decltype(aStatus)>::isValid, "invalid assertion condition"
); if ((__builtin_expect(!!(!(!!(aStatus))), 0))) { do { } while
 (false); MOZ_ReportAssertionFailure("aStatus", "/var/lib/jenkins/workspace/firefox-scan-build/dom/events/EventStateManager.cpp"
, 6034); AnnotateMozCrashReason("MOZ_ASSERT" "(" "aStatus" ")"
); do { *((volatile int*)__null) = 6034; __attribute__((nomerge
)) ::abort(); } while (false); } } while (false);
6035 
6036  RefPtr<PresShell> presShell = mPresContext->GetPresShell();
6037  if (!presShell) {
6038    return NS_OK;
6039  }
6040 
6041  nsCOMPtr<nsIContent> clickTarget =
6042      nsIContent::FromEventTargetOrNull(aMouseUpEvent->mClickTarget);
6043  NS_ENSURE_STATE(clickTarget)do { if ((__builtin_expect(!!(!(clickTarget)), 0))) { NS_DebugBreak
(NS_DEBUG_WARNING, "NS_ENSURE_TRUE(" "clickTarget" ") failed"
, nullptr, "/var/lib/jenkins/workspace/firefox-scan-build/dom/events/EventStateManager.cpp"
, 6043); return NS_ERROR_UNEXPECTED; } } while (false);
6044 
6045  // Fire click events if the event target is still available.
6046  // Note that do not include the eMouseUp event's status since we ignore it
6047  // for compatibility with the other browsers.
6048  nsEventStatus status = nsEventStatus_eIgnore;
6049  nsresult rv = DispatchClickEvents(presShell, aMouseUpEvent, &status,
6050                                    clickTarget, aOverrideClickTarget);
6051  if (NS_WARN_IF(NS_FAILED(rv))NS_warn_if_impl(((bool)(__builtin_expect(!!(NS_FAILED_impl(rv
)), 0))), "NS_FAILED(rv)", "/var/lib/jenkins/workspace/firefox-scan-build/dom/events/EventStateManager.cpp"
, 6051)) {
6052    return rv;
6053  }
6054 
6055  // Do not do anything if preceding click events are consumed.
6056  // Note that Chromium dispatches "paste" event and actually pates clipboard
6057  // text into focused editor even if the preceding click events are consumed.
6058  // However, this is different from our traditional behavior and does not
6059  // conform to DOM events.  If we need to keep compatibility with Chromium,
6060  // we should change it later.
6061  if (status == nsEventStatus_eConsumeNoDefault) {
6062    *aStatus = nsEventStatus_eConsumeNoDefault;
6063    return NS_OK;
6064  }
6065 
6066  // Handle middle click paste if it's enabled and the mouse button is middle.
6067  if (aMouseUpEvent->mButton != MouseButton::eMiddle ||
6068      !WidgetMouseEvent::IsMiddleClickPasteEnabled()) {
6069    return NS_OK;
6070  }
6071  DebugOnly<nsresult> rvIgnored =
6072      HandleMiddleClickPaste(presShell, aMouseUpEvent, &status, nullptr);
6073  NS_WARNING_ASSERTION(NS_SUCCEEDED(rvIgnored),do { if (!(((bool)(__builtin_expect(!!(!NS_FAILED_impl(rvIgnored
)), 1))))) { NS_DebugBreak(NS_DEBUG_WARNING, "Failed to paste for a middle click"
, "NS_SUCCEEDED(rvIgnored)", "/var/lib/jenkins/workspace/firefox-scan-build/dom/events/EventStateManager.cpp"
, 6074); } } while (false)
6074                       "Failed to paste for a middle click")do { if (!(((bool)(__builtin_expect(!!(!NS_FAILED_impl(rvIgnored
)), 1))))) { NS_DebugBreak(NS_DEBUG_WARNING, "Failed to paste for a middle click"
, "NS_SUCCEEDED(rvIgnored)", "/var/lib/jenkins/workspace/firefox-scan-build/dom/events/EventStateManager.cpp"
, 6074); } } while (false);
6075 
6076  // If new status is nsEventStatus_eConsumeNoDefault or
6077  // nsEventStatus_eConsumeDoDefault, use it.
6078  if (*aStatus != nsEventStatus_eConsumeNoDefault &&
6079      (status == nsEventStatus_eConsumeNoDefault ||
6080       status == nsEventStatus_eConsumeDoDefault)) {
6081    *aStatus = status;
6082  }
6083 
6084  // Don't return error even if middle mouse paste fails since we haven't
6085  // handled it here.
6086  return NS_OK;
6087}
6088 
6089nsresult EventStateManager::DispatchClickEvents(
6090    PresShell* aPresShell, WidgetMouseEvent* aMouseUpEvent,
6091    nsEventStatus* aStatus, nsIContent* aClickTarget,
6092    nsIContent* aOverrideClickTarget) {
6093  MOZ_ASSERT(aPresShell)do { static_assert( mozilla::detail::AssertionConditionType<
decltype(aPresShell)>::isValid, "invalid assertion condition"
); if ((__builtin_expect(!!(!(!!(aPresShell))), 0))) { do { }
 while (false); MOZ_ReportAssertionFailure("aPresShell", "/var/lib/jenkins/workspace/firefox-scan-build/dom/events/EventStateManager.cpp"
, 6093); AnnotateMozCrashReason("MOZ_ASSERT" "(" "aPresShell"
 ")"); do { *((volatile int*)__null) = 6093; __attribute__((nomerge
)) ::abort(); } while (false); } } while (false);
1
Assuming 'aPresShell' is non-null→
2
←
Taking false branch→
3
←
Loop condition is false.  Exiting loop→
6094  MOZ_ASSERT(aMouseUpEvent)do { static_assert( mozilla::detail::AssertionConditionType<
decltype(aMouseUpEvent)>::isValid, "invalid assertion condition"
); if ((__builtin_expect(!!(!(!!(aMouseUpEvent))), 0))) { do {
 } while (false); MOZ_ReportAssertionFailure("aMouseUpEvent",
 "/var/lib/jenkins/workspace/firefox-scan-build/dom/events/EventStateManager.cpp"
, 6094); AnnotateMozCrashReason("MOZ_ASSERT" "(" "aMouseUpEvent"
 ")"); do { *((volatile int*)__null) = 6094; __attribute__((nomerge
)) ::abort(); } while (false); } } while (false);
4
←
Assuming 'aMouseUpEvent' is non-null→
5
←
Taking false branch→
6
←
Loop condition is false.  Exiting loop→
6095  MOZ_ASSERT(EventCausesClickEvents(*aMouseUpEvent))do { static_assert( mozilla::detail::AssertionConditionType<
decltype(EventCausesClickEvents(*aMouseUpEvent))>::isValid
, "invalid assertion condition"); if ((__builtin_expect(!!(!(
!!(EventCausesClickEvents(*aMouseUpEvent)))), 0))) { do { } while
 (false); MOZ_ReportAssertionFailure("EventCausesClickEvents(*aMouseUpEvent)"
, "/var/lib/jenkins/workspace/firefox-scan-build/dom/events/EventStateManager.cpp"
, 6095); AnnotateMozCrashReason("MOZ_ASSERT" "(" "EventCausesClickEvents(*aMouseUpEvent)"
 ")"); do { *((volatile int*)__null) = 6095; __attribute__((nomerge
)) ::abort(); } while (false); } } while (false);
7
←
Taking false branch→
8
←
Loop condition is false.  Exiting loop→
6096  MOZ_ASSERT(aStatus)do { static_assert( mozilla::detail::AssertionConditionType<
decltype(aStatus)>::isValid, "invalid assertion condition"
); if ((__builtin_expect(!!(!(!!(aStatus))), 0))) { do { } while
 (false); MOZ_ReportAssertionFailure("aStatus", "/var/lib/jenkins/workspace/firefox-scan-build/dom/events/EventStateManager.cpp"
, 6096); AnnotateMozCrashReason("MOZ_ASSERT" "(" "aStatus" ")"
); do { *((volatile int*)__null) = 6096; __attribute__((nomerge
)) ::abort(); } while (false); } } while (false);
9
←
Assuming 'aStatus' is non-null→
10
←
Taking false branch→
11
←
Loop condition is false.  Exiting loop→
6097  MOZ_ASSERT(aClickTarget || aOverrideClickTarget)do { static_assert( mozilla::detail::AssertionConditionType<
decltype(aClickTarget || aOverrideClickTarget)>::isValid, "invalid assertion condition"
); if ((__builtin_expect(!!(!(!!(aClickTarget || aOverrideClickTarget
))), 0))) { do { } while (false); MOZ_ReportAssertionFailure(
"aClickTarget || aOverrideClickTarget", "/var/lib/jenkins/workspace/firefox-scan-build/dom/events/EventStateManager.cpp"
, 6097); AnnotateMozCrashReason("MOZ_ASSERT" "(" "aClickTarget || aOverrideClickTarget"
 ")"); do { *((volatile int*)__null) = 6097; __attribute__((nomerge
)) ::abort(); } while (false); } } while (false);
12
←
Assuming 'aClickTarget' is non-null→
13
←
Taking false branch→
6098 
6099  bool notDispatchToContents =
6100      (aMouseUpEvent->mButton == MouseButton::eMiddle ||
14
←
Assuming field 'mButton' is equal to eMiddle→
6101       aMouseUpEvent->mButton == MouseButton::eSecondary);
6102 
6103  bool fireAuxClick = notDispatchToContents;
6104 
6105  AutoWeakFrame currentTarget = aClickTarget->GetPrimaryFrame();
6106  nsresult rv = InitAndDispatchClickEvent(
15
←
Calling 'EventStateManager::InitAndDispatchClickEvent'→
6107      aMouseUpEvent, aStatus, ePointerClick, aPresShell, aClickTarget,
6108      currentTarget, notDispatchToContents, aOverrideClickTarget);
6109  if (NS_WARN_IF(NS_FAILED(rv))NS_warn_if_impl(((bool)(__builtin_expect(!!(NS_FAILED_impl(rv
)), 0))), "NS_FAILED(rv)", "/var/lib/jenkins/workspace/firefox-scan-build/dom/events/EventStateManager.cpp"
, 6109)) {
6110    return rv;
6111  }
6112 
6113  // Fire auxclick event if necessary.
6114  if (fireAuxClick && *aStatus != nsEventStatus_eConsumeNoDefault &&
6115      aClickTarget && aClickTarget->IsInComposedDoc()) {
6116    rv = InitAndDispatchClickEvent(aMouseUpEvent, aStatus, ePointerAuxClick,
6117                                   aPresShell, aClickTarget, currentTarget,
6118                                   false, aOverrideClickTarget);
6119    NS_WARNING_ASSERTION(NS_SUCCEEDED(rv),do { if (!(((bool)(__builtin_expect(!!(!NS_FAILED_impl(rv)), 1
))))) { NS_DebugBreak(NS_DEBUG_WARNING, "Failed to dispatch ePointerAuxClick"
, "NS_SUCCEEDED(rv)", "/var/lib/jenkins/workspace/firefox-scan-build/dom/events/EventStateManager.cpp"
, 6120); } } while (false)
6120                         "Failed to dispatch ePointerAuxClick")do { if (!(((bool)(__builtin_expect(!!(!NS_FAILED_impl(rv)), 1
))))) { NS_DebugBreak(NS_DEBUG_WARNING, "Failed to dispatch ePointerAuxClick"
, "NS_SUCCEEDED(rv)", "/var/lib/jenkins/workspace/firefox-scan-build/dom/events/EventStateManager.cpp"
, 6120); } } while (false);
6121  }
6122 
6123  // Fire double click event if click count is 2.
6124  if (aMouseUpEvent->mClickCount == 2 && !fireAuxClick && aClickTarget &&
6125      aClickTarget->IsInComposedDoc()) {
6126    rv = InitAndDispatchClickEvent(aMouseUpEvent, aStatus, eMouseDoubleClick,
6127                                   aPresShell, aClickTarget, currentTarget,
6128                                   notDispatchToContents, aOverrideClickTarget);
6129    if (NS_WARN_IF(NS_FAILED(rv))NS_warn_if_impl(((bool)(__builtin_expect(!!(NS_FAILED_impl(rv
)), 0))), "NS_FAILED(rv)", "/var/lib/jenkins/workspace/firefox-scan-build/dom/events/EventStateManager.cpp"
, 6129)) {
6130      return rv;
6131    }
6132  }
6133 
6134  return rv;
6135}
6136 
6137nsresult EventStateManager::HandleMiddleClickPaste(
6138    PresShell* aPresShell, WidgetMouseEvent* aMouseEvent,
6139    nsEventStatus* aStatus, EditorBase* aEditorBase) {
6140  MOZ_ASSERT(aPresShell)do { static_assert( mozilla::detail::AssertionConditionType<
decltype(aPresShell)>::isValid, "invalid assertion condition"
); if ((__builtin_expect(!!(!(!!(aPresShell))), 0))) { do { }
 while (false); MOZ_ReportAssertionFailure("aPresShell", "/var/lib/jenkins/workspace/firefox-scan-build/dom/events/EventStateManager.cpp"
, 6140); AnnotateMozCrashReason("MOZ_ASSERT" "(" "aPresShell"
 ")"); do { *((volatile int*)__null) = 6140; __attribute__((nomerge
)) ::abort(); } while (false); } } while (false);
6141  MOZ_ASSERT(aMouseEvent)do { static_assert( mozilla::detail::AssertionConditionType<
decltype(aMouseEvent)>::isValid, "invalid assertion condition"
); if ((__builtin_expect(!!(!(!!(aMouseEvent))), 0))) { do { }
 while (false); MOZ_ReportAssertionFailure("aMouseEvent", "/var/lib/jenkins/workspace/firefox-scan-build/dom/events/EventStateManager.cpp"
, 6141); AnnotateMozCrashReason("MOZ_ASSERT" "(" "aMouseEvent"
 ")"); do { *((volatile int*)__null) = 6141; __attribute__((nomerge
)) ::abort(); } while (false); } } while (false);
6142  MOZ_ASSERT((aMouseEvent->mMessage == ePointerAuxClick &&do { static_assert( mozilla::detail::AssertionConditionType<
decltype((aMouseEvent->mMessage == ePointerAuxClick &&
 aMouseEvent->mButton == MouseButton::eMiddle) || EventCausesClickEvents
(*aMouseEvent))>::isValid, "invalid assertion condition");
 if ((__builtin_expect(!!(!(!!((aMouseEvent->mMessage == ePointerAuxClick
 && aMouseEvent->mButton == MouseButton::eMiddle) ||
 EventCausesClickEvents(*aMouseEvent)))), 0))) { do { } while
 (false); MOZ_ReportAssertionFailure("(aMouseEvent->mMessage == ePointerAuxClick && aMouseEvent->mButton == MouseButton::eMiddle) || EventCausesClickEvents(*aMouseEvent)"
, "/var/lib/jenkins/workspace/firefox-scan-build/dom/events/EventStateManager.cpp"
, 6144); AnnotateMozCrashReason("MOZ_ASSERT" "(" "(aMouseEvent->mMessage == ePointerAuxClick && aMouseEvent->mButton == MouseButton::eMiddle) || EventCausesClickEvents(*aMouseEvent)"
 ")"); do { *((volatile int*)__null) = 6144; __attribute__((nomerge
)) ::abort(); } while (false); } } while (false)
6143              aMouseEvent->mButton == MouseButton::eMiddle) ||do { static_assert( mozilla::detail::AssertionConditionType<
decltype((aMouseEvent->mMessage == ePointerAuxClick &&
 aMouseEvent->mButton == MouseButton::eMiddle) || EventCausesClickEvents
(*aMouseEvent))>::isValid, "invalid assertion condition");
 if ((__builtin_expect(!!(!(!!((aMouseEvent->mMessage == ePointerAuxClick
 && aMouseEvent->mButton == MouseButton::eMiddle) ||
 EventCausesClickEvents(*aMouseEvent)))), 0))) { do { } while
 (false); MOZ_ReportAssertionFailure("(aMouseEvent->mMessage == ePointerAuxClick && aMouseEvent->mButton == MouseButton::eMiddle) || EventCausesClickEvents(*aMouseEvent)"
, "/var/lib/jenkins/workspace/firefox-scan-build/dom/events/EventStateManager.cpp"
, 6144); AnnotateMozCrashReason("MOZ_ASSERT" "(" "(aMouseEvent->mMessage == ePointerAuxClick && aMouseEvent->mButton == MouseButton::eMiddle) || EventCausesClickEvents(*aMouseEvent)"
 ")"); do { *((volatile int*)__null) = 6144; __attribute__((nomerge
)) ::abort(); } while (false); } } while (false)
6144             EventCausesClickEvents(*aMouseEvent))do { static_assert( mozilla::detail::AssertionConditionType<
decltype((aMouseEvent->mMessage == ePointerAuxClick &&
 aMouseEvent->mButton == MouseButton::eMiddle) || EventCausesClickEvents
(*aMouseEvent))>::isValid, "invalid assertion condition");
 if ((__builtin_expect(!!(!(!!((aMouseEvent->mMessage == ePointerAuxClick
 && aMouseEvent->mButton == MouseButton::eMiddle) ||
 EventCausesClickEvents(*aMouseEvent)))), 0))) { do { } while
 (false); MOZ_ReportAssertionFailure("(aMouseEvent->mMessage == ePointerAuxClick && aMouseEvent->mButton == MouseButton::eMiddle) || EventCausesClickEvents(*aMouseEvent)"
, "/var/lib/jenkins/workspace/firefox-scan-build/dom/events/EventStateManager.cpp"
, 6144); AnnotateMozCrashReason("MOZ_ASSERT" "(" "(aMouseEvent->mMessage == ePointerAuxClick && aMouseEvent->mButton == MouseButton::eMiddle) || EventCausesClickEvents(*aMouseEvent)"
 ")"); do { *((volatile int*)__null) = 6144; __attribute__((nomerge
)) ::abort(); } while (false); } } while (false);
6145  MOZ_ASSERT(aStatus)do { static_assert( mozilla::detail::AssertionConditionType<
decltype(aStatus)>::isValid, "invalid assertion condition"
); if ((__builtin_expect(!!(!(!!(aStatus))), 0))) { do { } while
 (false); MOZ_ReportAssertionFailure("aStatus", "/var/lib/jenkins/workspace/firefox-scan-build/dom/events/EventStateManager.cpp"
, 6145); AnnotateMozCrashReason("MOZ_ASSERT" "(" "aStatus" ")"
); do { *((volatile int*)__null) = 6145; __attribute__((nomerge
)) ::abort(); } while (false); } } while (false);
6146  MOZ_ASSERT(*aStatus != nsEventStatus_eConsumeNoDefault)do { static_assert( mozilla::detail::AssertionConditionType<
decltype(*aStatus != nsEventStatus_eConsumeNoDefault)>::isValid
, "invalid assertion condition"); if ((__builtin_expect(!!(!(
!!(*aStatus != nsEventStatus_eConsumeNoDefault))), 0))) { do {
 } while (false); MOZ_ReportAssertionFailure("*aStatus != nsEventStatus_eConsumeNoDefault"
, "/var/lib/jenkins/workspace/firefox-scan-build/dom/events/EventStateManager.cpp"
, 6146); AnnotateMozCrashReason("MOZ_ASSERT" "(" "*aStatus != nsEventStatus_eConsumeNoDefault"
 ")"); do { *((volatile int*)__null) = 6146; __attribute__((nomerge
)) ::abort(); } while (false); } } while (false);
6147 
6148  // Even if we're called twice or more for a mouse operation, we should
6149  // handle only once.  Although mMultipleActionsPrevented may be set to
6150  // true by different event handler in the future, we can use it for now.
6151  if (aMouseEvent->mFlags.mMultipleActionsPrevented) {
6152    return NS_OK;
6153  }
6154  aMouseEvent->mFlags.mMultipleActionsPrevented = true;
6155 
6156  RefPtr<Selection> selection;
6157  if (aEditorBase) {
6158    selection = aEditorBase->GetSelection();
6159    if (NS_WARN_IF(!selection)NS_warn_if_impl(!selection, "!selection", "/var/lib/jenkins/workspace/firefox-scan-build/dom/events/EventStateManager.cpp"
, 6159)) {
6160      return NS_ERROR_FAILURE;
6161    }
6162  } else {
6163    Document* document = aPresShell->GetDocument();
6164    if (NS_WARN_IF(!document)NS_warn_if_impl(!document, "!document", "/var/lib/jenkins/workspace/firefox-scan-build/dom/events/EventStateManager.cpp"
, 6164)) {
6165      return NS_ERROR_FAILURE;
6166    }
6167    selection = nsCopySupport::GetSelectionForCopy(document);
6168    if (NS_WARN_IF(!selection)NS_warn_if_impl(!selection, "!selection", "/var/lib/jenkins/workspace/firefox-scan-build/dom/events/EventStateManager.cpp"
, 6168)) {
6169      return NS_ERROR_FAILURE;
6170    }
6171 
6172    const nsRange* range = selection->GetRangeAt(0);
6173    if (range) {
6174      nsINode* target = range->GetStartContainer();
6175      if (target && target->OwnerDoc()->IsInChromeDocShell()) {
6176        // In Chrome document, limit middle-click pasting to only the editor
6177        // because it looks odd if pasting works in the focused editor when you
6178        // middle-click toolbar or something which are far from the editor.
6179        // However, as DevTools especially Web Console module assumes that paste
6180        // event will be fired when middle-click even on not editor, don't limit
6181        // it.
6182        return NS_OK;
6183      }
6184    }
6185  }
6186 
6187  // Don't modify selection here because we've already set caret to the point
6188  // at "mousedown" event.
6189 
6190  nsIClipboard::ClipboardType clipboardType = nsIClipboard::kGlobalClipboard;
6191  nsCOMPtr<nsIClipboard> clipboardService =
6192      do_GetService("@mozilla.org/widget/clipboard;1");
6193  if (clipboardService && clipboardService->IsClipboardTypeSupported(
6194                              nsIClipboard::kSelectionClipboard)) {
6195    clipboardType = nsIClipboard::kSelectionClipboard;
6196  }
6197 
6198  // Fire ePaste event by ourselves since we need to dispatch "paste" event
6199  // even if the middle click event was consumed for compatibility with
6200  // Chromium.
6201  if (!nsCopySupport::FireClipboardEvent(ePaste, Some(clipboardType),
6202                                         aPresShell, selection)) {
6203    *aStatus = nsEventStatus_eConsumeNoDefault;
6204    return NS_OK;
6205  }
6206 
6207  // Although we've fired "paste" event, there is no editor to accept the
6208  // clipboard content.
6209  if (!aEditorBase) {
6210    return NS_OK;
6211  }
6212 
6213  // Check if the editor is still the good target to paste.
6214  if (aEditorBase->Destroyed() || aEditorBase->IsReadonly()) {
6215    // XXX Should we consume the event when the editor is readonly and/or
6216    //     disabled?
6217    return NS_OK;
6218  }
6219 
6220  // The selection may have been modified during reflow.  Therefore, we
6221  // should adjust event target to pass IsAcceptableInputEvent().
6222  const nsRange* range = selection->GetRangeAt(0);
6223  if (!range) {
6224    return NS_OK;
6225  }
6226  WidgetMouseEvent mouseEvent(*aMouseEvent);
6227  mouseEvent.mOriginalTarget = range->GetStartContainer();
6228  if (NS_WARN_IF(!mouseEvent.mOriginalTarget)NS_warn_if_impl(!mouseEvent.mOriginalTarget, "!mouseEvent.mOriginalTarget"
, "/var/lib/jenkins/workspace/firefox-scan-build/dom/events/EventStateManager.cpp"
, 6228) ||
6229      !aEditorBase->IsAcceptableInputEvent(&mouseEvent)) {
6230    return NS_OK;
6231  }
6232 
6233  // If Control key is pressed, we should paste clipboard content as
6234  // quotation.  Otherwise, paste it as is.
6235  if (aMouseEvent->IsControl()) {
6236    DebugOnly<nsresult> rv = aEditorBase->PasteAsQuotationAsAction(
6237        clipboardType, EditorBase::DispatchPasteEvent::No);
6238    NS_WARNING_ASSERTION(NS_SUCCEEDED(rv), "Failed to paste as quotation")do { if (!(((bool)(__builtin_expect(!!(!NS_FAILED_impl(rv)), 1
))))) { NS_DebugBreak(NS_DEBUG_WARNING, "Failed to paste as quotation"
, "NS_SUCCEEDED(rv)", "/var/lib/jenkins/workspace/firefox-scan-build/dom/events/EventStateManager.cpp"
, 6238); } } while (false);
6239  } else {
6240    DebugOnly<nsresult> rv = aEditorBase->PasteAsAction(
6241        clipboardType, EditorBase::DispatchPasteEvent::No);
6242    NS_WARNING_ASSERTION(NS_SUCCEEDED(rv), "Failed to paste")do { if (!(((bool)(__builtin_expect(!!(!NS_FAILED_impl(rv)), 1
))))) { NS_DebugBreak(NS_DEBUG_WARNING, "Failed to paste", "NS_SUCCEEDED(rv)"
, "/var/lib/jenkins/workspace/firefox-scan-build/dom/events/EventStateManager.cpp"
, 6242); } } while (false);
6243  }
6244  *aStatus = nsEventStatus_eConsumeNoDefault;
6245 
6246  return NS_OK;
6247}
6248 
6249void EventStateManager::ConsumeInteractionData(
6250    Record<nsString, dom::InteractionData>& aInteractions) {
6251  OnTypingInteractionEnded();
6252 
6253  aInteractions.Entries().Clear();
6254  auto newEntry = aInteractions.Entries().AppendElement();
6255  newEntry->mKey = u"Typing"_ns;
6256  newEntry->mValue = gTypingInteraction;
6257  gTypingInteraction = {};
6258}
6259 
6260nsIFrame* EventStateManager::GetEventTarget() {
6261  PresShell* presShell;
6262  if (mCurrentTarget || !mPresContext ||
6263      !(presShell = mPresContext->GetPresShell())) {
6264    return mCurrentTarget;
6265  }
6266 
6267  if (mCurrentTargetContent) {
6268    mCurrentTarget = mPresContext->GetPrimaryFrameFor(mCurrentTargetContent);
6269    if (mCurrentTarget) {
6270      return mCurrentTarget;
6271    }
6272  }
6273 
6274  nsIFrame* frame = presShell->GetCurrentEventFrame();
6275  return (mCurrentTarget = frame);
6276}
6277 
6278already_AddRefed<nsIContent> EventStateManager::GetEventTargetContent(
6279    WidgetEvent* aEvent) {
6280  if (aEvent && (aEvent->mMessage == eFocus || aEvent->mMessage == eBlur)) {
6281    nsCOMPtr<nsIContent> content = GetFocusedElement();
6282    return content.forget();
6283  }
6284 
6285  if (mCurrentTargetContent) {
6286    nsCOMPtr<nsIContent> content = mCurrentTargetContent;
6287    return content.forget();
6288  }
6289 
6290  nsCOMPtr<nsIContent> content;
6291  if (PresShell* presShell = mPresContext->GetPresShell()) {
6292    content = presShell->GetEventTargetContent(aEvent);
6293  }
6294 
6295  // Some events here may set mCurrentTarget but not set the corresponding
6296  // event target in the PresShell.
6297  if (!content && mCurrentTarget) {
6298    mCurrentTarget->GetContentForEvent(aEvent, getter_AddRefs(content));
6299  }
6300 
6301  return content.forget();
6302}
6303 
6304static Element* GetLabelTarget(nsIContent* aPossibleLabel) {
6305  mozilla::dom::HTMLLabelElement* label =
6306      mozilla::dom::HTMLLabelElement::FromNode(aPossibleLabel);
6307  if (!label) return nullptr;
6308 
6309  return label->GetLabeledElement();
6310}
6311 
6312/* static */
6313inline void EventStateManager::DoStateChange(Element* aElement,
6314                                             ElementState aState,
6315                                             bool aAddState) {
6316  if (aAddState) {
6317    aElement->AddStates(aState);
6318  } else {
6319    aElement->RemoveStates(aState);
6320  }
6321}
6322 
6323/* static */
6324inline void EventStateManager::DoStateChange(nsIContent* aContent,
6325                                             ElementState aState,
6326                                             bool aStateAdded) {
6327  if (aContent->IsElement()) {
6328    DoStateChange(aContent->AsElement(), aState, aStateAdded);
6329  }
6330}
6331 
6332/* static */
6333void EventStateManager::UpdateAncestorState(nsIContent* aStartNode,
6334                                            nsIContent* aStopBefore,
6335                                            ElementState aState,
6336                                            bool aAddState) {
6337  for (; aStartNode && aStartNode != aStopBefore;
6338       aStartNode = aStartNode->GetFlattenedTreeParent()) {
6339    // We might be starting with a non-element (e.g. a text node) and
6340    // if someone is doing something weird might be ending with a
6341    // non-element too (e.g. a document fragment)
6342    if (!aStartNode->IsElement()) {
6343      continue;
6344    }
6345    Element* element = aStartNode->AsElement();
6346    DoStateChange(element, aState, aAddState);
6347    Element* labelTarget = GetLabelTarget(element);
6348    if (labelTarget) {
6349      DoStateChange(labelTarget, aState, aAddState);
6350    }
6351  }
6352 
6353  if (aAddState) {
6354    // We might be in a situation where a node was in hover both
6355    // because it was hovered and because the label for it was
6356    // hovered, and while we stopped hovering the node the label is
6357    // still hovered.  Or we might have had two nested labels for the
6358    // same node, and while one is no longer hovered the other still
6359    // is.  In that situation, the label that's still hovered will be
6360    // aStopBefore or some ancestor of it, and the call we just made
6361    // to UpdateAncestorState with aAddState = false would have
6362    // removed the hover state from the node.  But the node should
6363    // still be in hover state.  To handle this situation we need to
6364    // keep walking up the tree and any time we find a label mark its
6365    // corresponding node as still in our state.
6366    for (; aStartNode; aStartNode = aStartNode->GetFlattenedTreeParent()) {
6367      if (!aStartNode->IsElement()) {
6368        continue;
6369      }
6370 
6371      Element* labelTarget = GetLabelTarget(aStartNode->AsElement());
6372      if (labelTarget && !labelTarget->State().HasState(aState)) {
6373        DoStateChange(labelTarget, aState, true);
6374      }
6375    }
6376  }
6377}
6378 
6379// static
6380bool CanContentHaveActiveState(nsIContent& aContent) {
6381  // Editable content can never become active since their default actions
6382  // are disabled.  Watch out for editable content in native anonymous
6383  // subtrees though, as they belong to text controls.
6384  return !aContent.IsEditable() || aContent.IsInNativeAnonymousSubtree();
6385}
6386 
6387bool EventStateManager::SetContentState(nsIContent* aContent,
6388                                        ElementState aState) {
6389  MOZ_ASSERT(ManagesState(aState), "Unexpected state")do { static_assert( mozilla::detail::AssertionConditionType<
decltype(ManagesState(aState))>::isValid, "invalid assertion condition"
); if ((__builtin_expect(!!(!(!!(ManagesState(aState)))), 0))
) { do { } while (false); MOZ_ReportAssertionFailure("ManagesState(aState)"
 " (" "Unexpected state" ")", "/var/lib/jenkins/workspace/firefox-scan-build/dom/events/EventStateManager.cpp"
, 6389); AnnotateMozCrashReason("MOZ_ASSERT" "(" "ManagesState(aState)"
 ") (" "Unexpected state" ")"); do { *((volatile int*)__null)
 = 6389; __attribute__((nomerge)) ::abort(); } while (false);
 } } while (false);
6390 
6391  nsCOMPtr<nsIContent> notifyContent1;
6392  nsCOMPtr<nsIContent> notifyContent2;
6393  bool updateAncestors;
6394 
6395  if (aState == ElementState::HOVER || aState == ElementState::ACTIVE) {
6396    // Hover and active are hierarchical
6397    updateAncestors = true;
6398 
6399    // check to see that this state is allowed by style. Check dragover too?
6400    // XXX Is this even what we want?
6401    if (mCurrentTarget &&
6402        mCurrentTarget->StyleUI()->UserInput() == StyleUserInput::None) {
6403      return false;
6404    }
6405 
6406    if (aState == ElementState::ACTIVE) {
6407      if (aContent && !CanContentHaveActiveState(*aContent)) {
6408        aContent = nullptr;
6409      }
6410      if (aContent != mActiveContent) {
6411        notifyContent1 = aContent;
6412        notifyContent2 = mActiveContent;
6413        mActiveContent = aContent;
6414      }
6415    } else {
6416      NS_ASSERTION(aState == ElementState::HOVER, "How did that happen?")do { if (!(aState == ElementState::HOVER)) { NS_DebugBreak(NS_DEBUG_ASSERTION
, "How did that happen?", "aState == ElementState::HOVER", "/var/lib/jenkins/workspace/firefox-scan-build/dom/events/EventStateManager.cpp"
, 6416); MOZ_PretendNoReturn(); } } while (0);
6417      nsIContent* newHover;
6418 
6419      if (mPresContext->IsDynamic()) {
6420        newHover = aContent;
6421      } else {
6422        NS_ASSERTION(!aContent || aContent->GetComposedDoc() ==do { if (!(!aContent || aContent->GetComposedDoc() == mPresContext
->PresShell()->GetDocument())) { NS_DebugBreak(NS_DEBUG_ASSERTION
, "Unexpected document", "!aContent || aContent->GetComposedDoc() == mPresContext->PresShell()->GetDocument()"
, "/var/lib/jenkins/workspace/firefox-scan-build/dom/events/EventStateManager.cpp"
, 6424); MOZ_PretendNoReturn(); } } while (0)
6423                                      mPresContext->PresShell()->GetDocument(),do { if (!(!aContent || aContent->GetComposedDoc() == mPresContext
->PresShell()->GetDocument())) { NS_DebugBreak(NS_DEBUG_ASSERTION
, "Unexpected document", "!aContent || aContent->GetComposedDoc() == mPresContext->PresShell()->GetDocument()"
, "/var/lib/jenkins/workspace/firefox-scan-build/dom/events/EventStateManager.cpp"
, 6424); MOZ_PretendNoReturn(); } } while (0)
6424                     "Unexpected document")do { if (!(!aContent || aContent->GetComposedDoc() == mPresContext
->PresShell()->GetDocument())) { NS_DebugBreak(NS_DEBUG_ASSERTION
, "Unexpected document", "!aContent || aContent->GetComposedDoc() == mPresContext->PresShell()->GetDocument()"
, "/var/lib/jenkins/workspace/firefox-scan-build/dom/events/EventStateManager.cpp"
, 6424); MOZ_PretendNoReturn(); } } while (0);
6425        nsIFrame* frame = aContent ? aContent->GetPrimaryFrame() : nullptr;
6426        if (frame && nsLayoutUtils::IsViewportScrollbarFrame(frame)) {
6427          // The scrollbars of viewport should not ignore the hover state.
6428          // Because they are *not* the content of the web page.
6429          newHover = aContent;
6430        } else {
6431          // All contents of the web page should ignore the hover state.
6432          newHover = nullptr;
6433        }
6434      }
6435 
6436      if (newHover != mHoverContent) {
6437        notifyContent1 = newHover;
6438        notifyContent2 = mHoverContent;
6439        mHoverContent = newHover;
6440      }
6441    }
6442  } else {
6443    updateAncestors = false;
6444    if (aState == ElementState::DRAGOVER) {
6445      if (aContent != sDragOverContent) {
6446        notifyContent1 = aContent;
6447        notifyContent2 = sDragOverContent;
6448        sDragOverContent = aContent;
6449      }
6450    } else if (aState == ElementState::URLTARGET) {
6451      if (aContent != mURLTargetContent) {
6452        notifyContent1 = aContent;
6453        notifyContent2 = mURLTargetContent;
6454        mURLTargetContent = aContent;
6455      }
6456    }
6457  }
6458 
6459  // We need to keep track of which of notifyContent1 and notifyContent2 is
6460  // getting the state set and which is getting it unset.  If both are
6461  // non-null, then notifyContent1 is having the state set and notifyContent2
6462  // is having it unset.  But if one of them is null, we need to keep track of
6463  // the right thing for notifyContent1 explicitly.
6464  bool content1StateSet = true;
6465  if (!notifyContent1) {
6466    // This is ok because FindCommonAncestor wouldn't find anything
6467    // anyway if notifyContent1 is null.
6468    notifyContent1 = notifyContent2;
6469    notifyContent2 = nullptr;
6470    content1StateSet = false;
6471  }
6472 
6473  if (notifyContent1 && mPresContext) {
6474    EnsureDocument(mPresContext);
6475    if (mDocument) {
6476      nsAutoScriptBlocker scriptBlocker;
6477 
6478      if (updateAncestors) {
6479        nsCOMPtr<nsIContent> commonAncestor =
6480            FindCommonAncestor(notifyContent1, notifyContent2);
6481        if (notifyContent2) {
6482          // It's very important to first notify the state removal and
6483          // then the state addition, because due to labels it's
6484          // possible that we're removing state from some element but
6485          // then adding it again (say because mHoverContent changed
6486          // from a control to its label).
6487          UpdateAncestorState(notifyContent2, commonAncestor, aState, false);
6488        }
6489        UpdateAncestorState(notifyContent1, commonAncestor, aState,
6490                            content1StateSet);
6491      } else {
6492        if (notifyContent2) {
6493          DoStateChange(notifyContent2, aState, false);
6494        }
6495        DoStateChange(notifyContent1, aState, content1StateSet);
6496      }
6497    }
6498  }
6499 
6500  return true;
6501}
6502 
6503void EventStateManager::RemoveNodeFromChainIfNeeded(ElementState aState,
6504                                                    nsIContent* aContentRemoved,
6505                                                    bool aNotify) {
6506  MOZ_ASSERT(aState == ElementState::HOVER || aState == ElementState::ACTIVE)do { static_assert( mozilla::detail::AssertionConditionType<
decltype(aState == ElementState::HOVER || aState == ElementState
::ACTIVE)>::isValid, "invalid assertion condition"); if ((
__builtin_expect(!!(!(!!(aState == ElementState::HOVER || aState
 == ElementState::ACTIVE))), 0))) { do { } while (false); MOZ_ReportAssertionFailure
("aState == ElementState::HOVER || aState == ElementState::ACTIVE"
, "/var/lib/jenkins/workspace/firefox-scan-build/dom/events/EventStateManager.cpp"
, 6506); AnnotateMozCrashReason("MOZ_ASSERT" "(" "aState == ElementState::HOVER || aState == ElementState::ACTIVE"
 ")"); do { *((volatile int*)__null) = 6506; __attribute__((nomerge
)) ::abort(); } while (false); } } while (false);
6507  if (!aContentRemoved->IsElement() ||
6508      !aContentRemoved->AsElement()->State().HasState(aState)) {
6509    return;
6510  }
6511 
6512  nsCOMPtr<nsIContent>& leaf =
6513      aState == ElementState::HOVER ? mHoverContent : mActiveContent;
6514 
6515  MOZ_ASSERT(leaf)do { static_assert( mozilla::detail::AssertionConditionType<
decltype(leaf)>::isValid, "invalid assertion condition"); if
 ((__builtin_expect(!!(!(!!(leaf))), 0))) { do { } while (false
); MOZ_ReportAssertionFailure("leaf", "/var/lib/jenkins/workspace/firefox-scan-build/dom/events/EventStateManager.cpp"
, 6515); AnnotateMozCrashReason("MOZ_ASSERT" "(" "leaf" ")");
 do { *((volatile int*)__null) = 6515; __attribute__((nomerge
)) ::abort(); } while (false); } } while (false);
6516  // These two NS_ASSERTIONS below can fail for Shadow DOM sometimes, and it's
6517  // not clear how to best handle it, see
6518  // https://github.com/whatwg/html/issues/4795 and bug 1551621.
6519  NS_ASSERTION(do { if (!(nsContentUtils::ContentIsFlattenedTreeDescendantOf
(leaf, aContentRemoved))) { NS_DebugBreak(NS_DEBUG_ASSERTION,
 "Flat tree and active / hover chain got out of sync", "nsContentUtils::ContentIsFlattenedTreeDescendantOf(leaf, aContentRemoved)"
, "/var/lib/jenkins/workspace/firefox-scan-build/dom/events/EventStateManager.cpp"
, 6521); MOZ_PretendNoReturn(); } } while (0)
6520      nsContentUtils::ContentIsFlattenedTreeDescendantOf(leaf, aContentRemoved),do { if (!(nsContentUtils::ContentIsFlattenedTreeDescendantOf
(leaf, aContentRemoved))) { NS_DebugBreak(NS_DEBUG_ASSERTION,
 "Flat tree and active / hover chain got out of sync", "nsContentUtils::ContentIsFlattenedTreeDescendantOf(leaf, aContentRemoved)"
, "/var/lib/jenkins/workspace/firefox-scan-build/dom/events/EventStateManager.cpp"
, 6521); MOZ_PretendNoReturn(); } } while (0)
6521      "Flat tree and active / hover chain got out of sync")do { if (!(nsContentUtils::ContentIsFlattenedTreeDescendantOf
(leaf, aContentRemoved))) { NS_DebugBreak(NS_DEBUG_ASSERTION,
 "Flat tree and active / hover chain got out of sync", "nsContentUtils::ContentIsFlattenedTreeDescendantOf(leaf, aContentRemoved)"
, "/var/lib/jenkins/workspace/firefox-scan-build/dom/events/EventStateManager.cpp"
, 6521); MOZ_PretendNoReturn(); } } while (0);
6522 
6523  nsIContent* newLeaf = aContentRemoved->GetFlattenedTreeParent();
6524  MOZ_ASSERT(!newLeaf || newLeaf->IsElement())do { static_assert( mozilla::detail::AssertionConditionType<
decltype(!newLeaf || newLeaf->IsElement())>::isValid, "invalid assertion condition"
); if ((__builtin_expect(!!(!(!!(!newLeaf || newLeaf->IsElement
()))), 0))) { do { } while (false); MOZ_ReportAssertionFailure
("!newLeaf || newLeaf->IsElement()", "/var/lib/jenkins/workspace/firefox-scan-build/dom/events/EventStateManager.cpp"
, 6524); AnnotateMozCrashReason("MOZ_ASSERT" "(" "!newLeaf || newLeaf->IsElement()"
 ")"); do { *((volatile int*)__null) = 6524; __attribute__((nomerge
)) ::abort(); } while (false); } } while (false);
6525  NS_ASSERTION(!newLeaf || newLeaf->AsElement()->State().HasState(aState),do { if (!(!newLeaf || newLeaf->AsElement()->State().HasState
(aState))) { NS_DebugBreak(NS_DEBUG_ASSERTION, "State got out of sync because of shadow DOM"
, "!newLeaf || newLeaf->AsElement()->State().HasState(aState)"
, "/var/lib/jenkins/workspace/firefox-scan-build/dom/events/EventStateManager.cpp"
, 6526); MOZ_PretendNoReturn(); } } while (0)
6526               "State got out of sync because of shadow DOM")do { if (!(!newLeaf || newLeaf->AsElement()->State().HasState
(aState))) { NS_DebugBreak(NS_DEBUG_ASSERTION, "State got out of sync because of shadow DOM"
, "!newLeaf || newLeaf->AsElement()->State().HasState(aState)"
, "/var/lib/jenkins/workspace/firefox-scan-build/dom/events/EventStateManager.cpp"
, 6526); MOZ_PretendNoReturn(); } } while (0);
6527  if (aNotify) {
6528    SetContentState(newLeaf, aState);
6529  } else {
6530    // We don't update the removed content's state here, since removing NAC
6531    // happens from layout and we don't really want to notify at that point or
6532    // what not.
6533    //
6534    // Also, NAC is not observable and NAC being removed will go away soon.
6535    leaf = newLeaf;
6536  }
6537  MOZ_ASSERT(leaf == newLeaf || (aState == ElementState::ACTIVE && !leaf &&do { static_assert( mozilla::detail::AssertionConditionType<
decltype(leaf == newLeaf || (aState == ElementState::ACTIVE &&
 !leaf && !CanContentHaveActiveState(*newLeaf)))>::
isValid, "invalid assertion condition"); if ((__builtin_expect
(!!(!(!!(leaf == newLeaf || (aState == ElementState::ACTIVE &&
 !leaf && !CanContentHaveActiveState(*newLeaf))))), 0
))) { do { } while (false); MOZ_ReportAssertionFailure("leaf == newLeaf || (aState == ElementState::ACTIVE && !leaf && !CanContentHaveActiveState(*newLeaf))"
, "/var/lib/jenkins/workspace/firefox-scan-build/dom/events/EventStateManager.cpp"
, 6538); AnnotateMozCrashReason("MOZ_ASSERT" "(" "leaf == newLeaf || (aState == ElementState::ACTIVE && !leaf && !CanContentHaveActiveState(*newLeaf))"
 ")"); do { *((volatile int*)__null) = 6538; __attribute__((nomerge
)) ::abort(); } while (false); } } while (false)
6538                                 !CanContentHaveActiveState(*newLeaf)))do { static_assert( mozilla::detail::AssertionConditionType<
decltype(leaf == newLeaf || (aState == ElementState::ACTIVE &&
 !leaf && !CanContentHaveActiveState(*newLeaf)))>::
isValid, "invalid assertion condition"); if ((__builtin_expect
(!!(!(!!(leaf == newLeaf || (aState == ElementState::ACTIVE &&
 !leaf && !CanContentHaveActiveState(*newLeaf))))), 0
))) { do { } while (false); MOZ_ReportAssertionFailure("leaf == newLeaf || (aState == ElementState::ACTIVE && !leaf && !CanContentHaveActiveState(*newLeaf))"
, "/var/lib/jenkins/workspace/firefox-scan-build/dom/events/EventStateManager.cpp"
, 6538); AnnotateMozCrashReason("MOZ_ASSERT" "(" "leaf == newLeaf || (aState == ElementState::ACTIVE && !leaf && !CanContentHaveActiveState(*newLeaf))"
 ")"); do { *((volatile int*)__null) = 6538; __attribute__((nomerge
)) ::abort(); } while (false); } } while (false);
6539}
6540 
6541void EventStateManager::NativeAnonymousContentRemoved(nsIContent* aContent) {
6542  MOZ_ASSERT(aContent->IsRootOfNativeAnonymousSubtree())do { static_assert( mozilla::detail::AssertionConditionType<
decltype(aContent->IsRootOfNativeAnonymousSubtree())>::
isValid, "invalid assertion condition"); if ((__builtin_expect
(!!(!(!!(aContent->IsRootOfNativeAnonymousSubtree()))), 0)
)) { do { } while (false); MOZ_ReportAssertionFailure("aContent->IsRootOfNativeAnonymousSubtree()"
, "/var/lib/jenkins/workspace/firefox-scan-build/dom/events/EventStateManager.cpp"
, 6542); AnnotateMozCrashReason("MOZ_ASSERT" "(" "aContent->IsRootOfNativeAnonymousSubtree()"
 ")"); do { *((volatile int*)__null) = 6542; __attribute__((nomerge
)) ::abort(); } while (false); } } while (false);
6543  RemoveNodeFromChainIfNeeded(ElementState::HOVER, aContent, false);
6544  RemoveNodeFromChainIfNeeded(ElementState::ACTIVE, aContent, false);
6545 
6546  nsCOMPtr<nsIContent>& lastLeftMouseDownContent =
6547      mLastLeftMouseDownInfo.mLastMouseDownContent;
6548  if (lastLeftMouseDownContent &&
6549      nsContentUtils::ContentIsFlattenedTreeDescendantOf(
6550          lastLeftMouseDownContent, aContent)) {
6551    lastLeftMouseDownContent = aContent->GetFlattenedTreeParent();
6552  }
6553 
6554  nsCOMPtr<nsIContent>& lastMiddleMouseDownContent =
6555      mLastMiddleMouseDownInfo.mLastMouseDownContent;
6556  if (lastMiddleMouseDownContent &&
6557      nsContentUtils::ContentIsFlattenedTreeDescendantOf(
6558          lastMiddleMouseDownContent, aContent)) {
6559    lastMiddleMouseDownContent = aContent->GetFlattenedTreeParent();
6560  }
6561 
6562  nsCOMPtr<nsIContent>& lastRightMouseDownContent =
6563      mLastRightMouseDownInfo.mLastMouseDownContent;
6564  if (lastRightMouseDownContent &&
6565      nsContentUtils::ContentIsFlattenedTreeDescendantOf(
6566          lastRightMouseDownContent, aContent)) {
6567    lastRightMouseDownContent = aContent->GetFlattenedTreeParent();
6568  }
6569}
6570 
6571void EventStateManager::ContentRemoved(Document* aDocument,
6572                                       nsIContent* aContent) {
6573  /*
6574   * Anchor and area elements when focused or hovered might make the UI to show
6575   * the current link. We want to make sure that the UI gets informed when they
6576   * are actually removed from the DOM.
6577   */
6578  if (aContent->IsAnyOfHTMLElements(nsGkAtoms::a, nsGkAtoms::area) &&
6579      (aContent->AsElement()->State().HasAtLeastOneOfStates(
6580          ElementState::FOCUS | ElementState::HOVER))) {
6581    Element* element = aContent->AsElement();
6582    element->LeaveLink(element->GetPresContext(Element::eForComposedDoc));
6583  }
6584 
6585  if (aContent->IsElement()) {
6586    if (RefPtr<nsPresContext> presContext = mPresContext) {
6587      IMEStateManager::OnRemoveContent(*presContext,
6588                                       MOZ_KnownLive(*aContent->AsElement())(*aContent->AsElement()));
6589    }
6590    WheelTransaction::OnRemoveElement(aContent);
6591  }
6592 
6593  // inform the focus manager that the content is being removed. If this
6594  // content is focused, the focus will be removed without firing events.
6595  if (RefPtr<nsFocusManager> fm = nsFocusManager::GetFocusManager()) {
6596    fm->ContentRemoved(aDocument, aContent);
6597  }
6598 
6599  RemoveNodeFromChainIfNeeded(ElementState::HOVER, aContent, true);
6600  RemoveNodeFromChainIfNeeded(ElementState::ACTIVE, aContent, true);
6601 
6602  if (sDragOverContent &&
6603      sDragOverContent->OwnerDoc() == aContent->OwnerDoc() &&
6604      nsContentUtils::ContentIsFlattenedTreeDescendantOf(sDragOverContent,
6605                                                         aContent)) {
6606    sDragOverContent = nullptr;
6607  }
6608 
6609  PointerEventHandler::ReleaseIfCaptureByDescendant(aContent);
6610 
6611  if (mMouseEnterLeaveHelper) {
6612    const bool hadMouseOutTarget =
6613        mMouseEnterLeaveHelper->GetOutEventTarget() != nullptr;
6614    mMouseEnterLeaveHelper->ContentRemoved(*aContent);
6615    // If we lose the mouseout target, we need to dispatch mouseover on an
6616    // ancestor.  For ensuring the chance to do it before next user input, we
6617    // need a synthetic mouse move.
6618    if (hadMouseOutTarget && !mMouseEnterLeaveHelper->GetOutEventTarget()) {
6619      if (PresShell* presShell =
6620              mPresContext ? mPresContext->GetPresShell() : nullptr) {
6621        presShell->SynthesizeMouseMove(false);
6622      }
6623    }
6624  }
6625  for (const auto& entry : mPointersEnterLeaveHelper) {
6626    if (entry.GetData()) {
6627      entry.GetData()->ContentRemoved(*aContent);
6628    }
6629  }
6630}
6631 
6632void EventStateManager::TextControlRootWillBeRemoved(
6633    TextControlElement& aTextControlElement) {
6634  if (!mGestureDownInTextControl || !mGestureDownFrameOwner ||
6635      !mGestureDownFrameOwner->IsInNativeAnonymousSubtree()) {
6636    return;
6637  }
6638  // If we track gesture to start drag in aTextControlElement, we should keep
6639  // tracking it with aTextContrlElement itself for now because this may be
6640  // caused by reframing aTextControlElement which may not be intended by the
6641  // user.
6642  if (&aTextControlElement ==
6643      mGestureDownFrameOwner
6644          ->GetClosestNativeAnonymousSubtreeRootParentOrHost()) {
6645    mGestureDownFrameOwner = &aTextControlElement;
6646  }
6647}
6648 
6649void EventStateManager::TextControlRootAdded(
6650    Element& aAnonymousDivElement, TextControlElement& aTextControlElement) {
6651  if (!mGestureDownInTextControl ||
6652      mGestureDownFrameOwner != &aTextControlElement) {
6653    return;
6654  }
6655  // If we track gesture to start drag in aTextControlElement, but the frame
6656  // owner is the text control element itself, the anonymous nodes in it are
6657  // recreated by a reframe.  If so, we should keep tracking it with the
6658  // recreated native anonymous node.
6659  mGestureDownFrameOwner =
6660      aAnonymousDivElement.GetFirstChild()
6661          ? aAnonymousDivElement.GetFirstChild()
6662          : static_cast<nsIContent*>(&aAnonymousDivElement);
6663}
6664 
6665bool EventStateManager::EventStatusOK(WidgetGUIEvent* aEvent) {
6666  return !(aEvent->mMessage == eMouseDown &&
6667           aEvent->AsMouseEvent()->mButton == MouseButton::ePrimary &&
6668           !sNormalLMouseEventInProcess);
6669}
6670 
6671//-------------------------------------------
6672// Access Key Registration
6673//-------------------------------------------
6674void EventStateManager::RegisterAccessKey(Element* aElement, uint32_t aKey) {
6675  if (aElement && !mAccessKeys.Contains(aElement)) {
6676    mAccessKeys.AppendObject(aElement);
6677  }
6678}
6679 
6680void EventStateManager::UnregisterAccessKey(Element* aElement, uint32_t aKey) {
6681  if (aElement) {
6682    mAccessKeys.RemoveObject(aElement);
6683  }
6684}
6685 
6686uint32_t EventStateManager::GetRegisteredAccessKey(Element* aElement) {
6687  MOZ_ASSERT(aElement)do { static_assert( mozilla::detail::AssertionConditionType<
decltype(aElement)>::isValid, "invalid assertion condition"
); if ((__builtin_expect(!!(!(!!(aElement))), 0))) { do { } while
 (false); MOZ_ReportAssertionFailure("aElement", "/var/lib/jenkins/workspace/firefox-scan-build/dom/events/EventStateManager.cpp"
, 6687); AnnotateMozCrashReason("MOZ_ASSERT" "(" "aElement" ")"
); do { *((volatile int*)__null) = 6687; __attribute__((nomerge
)) ::abort(); } while (false); } } while (false);
6688 
6689  if (!mAccessKeys.Contains(aElement)) {
6690    return 0;
6691  }
6692 
6693  nsAutoString accessKey;
6694  aElement->GetAttr(nsGkAtoms::accesskey, accessKey);
6695  return accessKey.First();
6696}
6697 
6698void EventStateManager::EnsureDocument(nsPresContext* aPresContext) {
6699  if (!mDocument) mDocument = aPresContext->Document();
6700}
6701 
6702void EventStateManager::FlushLayout(nsPresContext* aPresContext) {
6703  MOZ_ASSERT(aPresContext, "nullptr ptr")do { static_assert( mozilla::detail::AssertionConditionType<
decltype(aPresContext)>::isValid, "invalid assertion condition"
); if ((__builtin_expect(!!(!(!!(aPresContext))), 0))) { do {
 } while (false); MOZ_ReportAssertionFailure("aPresContext" " ("
 "nullptr ptr" ")", "/var/lib/jenkins/workspace/firefox-scan-build/dom/events/EventStateManager.cpp"
, 6703); AnnotateMozCrashReason("MOZ_ASSERT" "(" "aPresContext"
 ") (" "nullptr ptr" ")"); do { *((volatile int*)__null) = 6703
; __attribute__((nomerge)) ::abort(); } while (false); } } while
 (false);
6704  if (RefPtr<PresShell> presShell = aPresContext->GetPresShell()) {
6705    presShell->FlushPendingNotifications(FlushType::InterruptibleLayout);
6706  }
6707}
6708 
6709Element* EventStateManager::GetFocusedElement() {
6710  nsFocusManager* fm = nsFocusManager::GetFocusManager();
6711  EnsureDocument(mPresContext);
6712  if (!fm || !mDocument) {
6713    return nullptr;
6714  }
6715 
6716  nsCOMPtr<nsPIDOMWindowOuter> focusedWindow;
6717  return nsFocusManager::GetFocusedDescendant(
6718      mDocument->GetWindow(), nsFocusManager::eOnlyCurrentWindow,
6719      getter_AddRefs(focusedWindow));
6720}
6721 
6722//-------------------------------------------------------
6723// Return true if the docshell is visible
6724 
6725bool EventStateManager::IsShellVisible(nsIDocShell* aShell) {
6726  NS_ASSERTION(aShell, "docshell is null")do { if (!(aShell)) { NS_DebugBreak(NS_DEBUG_ASSERTION, "docshell is null"
, "aShell", "/var/lib/jenkins/workspace/firefox-scan-build/dom/events/EventStateManager.cpp"
, 6726); MOZ_PretendNoReturn(); } } while (0);
6727 
6728  nsCOMPtr<nsIBaseWindow> basewin = do_QueryInterface(aShell);
6729  if (!basewin) return true;
6730 
6731  bool isVisible = true;
6732  basewin->GetVisibility(&isVisible);
6733 
6734  // We should be doing some additional checks here so that
6735  // we don't tab into hidden tabs of tabbrowser.  -bryner
6736 
6737  return isVisible;
6738}
6739 
6740nsresult EventStateManager::DoContentCommandEvent(
6741    WidgetContentCommandEvent* aEvent) {
6742  EnsureDocument(mPresContext);
6743  NS_ENSURE_TRUE(mDocument, NS_ERROR_FAILURE)do { if ((__builtin_expect(!!(!(mDocument)), 0))) { NS_DebugBreak
(NS_DEBUG_WARNING, "NS_ENSURE_TRUE(" "mDocument" ") failed", nullptr
, "/var/lib/jenkins/workspace/firefox-scan-build/dom/events/EventStateManager.cpp"
, 6743); return NS_ERROR_FAILURE; } } while (false);
6744  nsCOMPtr<nsPIDOMWindowOuter> window(mDocument->GetWindow());
6745  NS_ENSURE_TRUE(window, NS_ERROR_FAILURE)do { if ((__builtin_expect(!!(!(window)), 0))) { NS_DebugBreak
(NS_DEBUG_WARNING, "NS_ENSURE_TRUE(" "window" ") failed", nullptr
, "/var/lib/jenkins/workspace/firefox-scan-build/dom/events/EventStateManager.cpp"
, 6745); return NS_ERROR_FAILURE; } } while (false);
6746 
6747  nsCOMPtr<nsPIWindowRoot> root = window->GetTopWindowRoot();
6748  NS_ENSURE_TRUE(root, NS_ERROR_FAILURE)do { if ((__builtin_expect(!!(!(root)), 0))) { NS_DebugBreak(
NS_DEBUG_WARNING, "NS_ENSURE_TRUE(" "root" ") failed", nullptr
, "/var/lib/jenkins/workspace/firefox-scan-build/dom/events/EventStateManager.cpp"
, 6748); return NS_ERROR_FAILURE; } } while (false);
6749  const char* cmd;
6750  bool maybeNeedToHandleInRemote = false;
6751  switch (aEvent->mMessage) {
6752    case eContentCommandCut:
6753      cmd = "cmd_cut";
6754      maybeNeedToHandleInRemote = true;
6755      break;
6756    case eContentCommandCopy:
6757      cmd = "cmd_copy";
6758      maybeNeedToHandleInRemote = true;
6759      break;
6760    case eContentCommandPaste:
6761      cmd = "cmd_paste";
6762      maybeNeedToHandleInRemote = true;
6763      break;
6764    case eContentCommandDelete:
6765      cmd = "cmd_delete";
6766      maybeNeedToHandleInRemote = true;
6767      break;
6768    case eContentCommandUndo:
6769      cmd = "cmd_undo";
6770      maybeNeedToHandleInRemote = true;
6771      break;
6772    case eContentCommandRedo:
6773      cmd = "cmd_redo";
6774      maybeNeedToHandleInRemote = true;
6775      break;
6776    case eContentCommandPasteTransferable:
6777      cmd = "cmd_pasteTransferable";
6778      break;
6779    case eContentCommandLookUpDictionary:
6780      cmd = "cmd_lookUpDictionary";
6781      break;
6782    default:
6783      return NS_ERROR_NOT_IMPLEMENTED;
6784  }
6785  if (XRE_IsParentProcess() && maybeNeedToHandleInRemote) {
6786    if (BrowserParent* remote = BrowserParent::GetFocused()) {
6787      if (!aEvent->mOnlyEnabledCheck) {
6788        remote->SendSimpleContentCommandEvent(*aEvent);
6789      }
6790      // XXX The command may be disabled in the parent process.  Perhaps, we
6791      // should set actual enabled state in the parent process here and there
6792      // should be another bool flag which indicates whether the content is sent
6793      // to a remote process.
6794      aEvent->mIsEnabled = true;
6795      aEvent->mSucceeded = true;
6796      return NS_OK;
6797    }
6798  }
6799  // If user tries to do something, user must try to do it in visible window.
6800  // So, let's retrieve controller of visible window.
6801  nsCOMPtr<nsIController> controller;
6802  nsresult rv =
6803      root->GetControllerForCommand(cmd, true, getter_AddRefs(controller));
6804  NS_ENSURE_SUCCESS(rv, rv)do { nsresult __rv = rv; if (((bool)(__builtin_expect(!!(NS_FAILED_impl
(__rv)), 0)))) { const char* name = mozilla::GetStaticErrorName
(__rv); mozilla::SmprintfPointer msg = mozilla::Smprintf( "NS_ENSURE_SUCCESS(%s, %s) failed with "
 "result 0x%" "X" "%s%s%s", "rv", "rv", static_cast<uint32_t
>(__rv), name ? " (" : "", name ? name : "", name ? ")" : ""
); NS_DebugBreak(NS_DEBUG_WARNING, msg.get(), nullptr, "/var/lib/jenkins/workspace/firefox-scan-build/dom/events/EventStateManager.cpp"
, 6804); return rv; } } while (false);
6805  if (!controller) {
6806    // When GetControllerForCommand succeeded but there is no controller, the
6807    // command isn't supported.
6808    aEvent->mIsEnabled = false;
6809  } else {
6810    bool canDoIt;
6811    rv = controller->IsCommandEnabled(cmd, &canDoIt);
6812    NS_ENSURE_SUCCESS(rv, rv)do { nsresult __rv = rv; if (((bool)(__builtin_expect(!!(NS_FAILED_impl
(__rv)), 0)))) { const char* name = mozilla::GetStaticErrorName
(__rv); mozilla::SmprintfPointer msg = mozilla::Smprintf( "NS_ENSURE_SUCCESS(%s, %s) failed with "
 "result 0x%" "X" "%s%s%s", "rv", "rv", static_cast<uint32_t
>(__rv), name ? " (" : "", name ? name : "", name ? ")" : ""
); NS_DebugBreak(NS_DEBUG_WARNING, msg.get(), nullptr, "/var/lib/jenkins/workspace/firefox-scan-build/dom/events/EventStateManager.cpp"
, 6812); return rv; } } while (false);
6813    aEvent->mIsEnabled = canDoIt;
6814    if (canDoIt && !aEvent->mOnlyEnabledCheck) {
6815      switch (aEvent->mMessage) {
6816        case eContentCommandPasteTransferable: {
6817          BrowserParent* remote = BrowserParent::GetFocused();
6818          if (remote) {
6819            IPCTransferable ipcTransferable;
6820            nsContentUtils::TransferableToIPCTransferable(
6821                aEvent->mTransferable, &ipcTransferable, false,
6822                remote->Manager());
6823            remote->SendPasteTransferable(std::move(ipcTransferable));
6824            rv = NS_OK;
6825          } else {
6826            nsCOMPtr<nsICommandController> commandController =
6827                do_QueryInterface(controller);
6828            NS_ENSURE_STATE(commandController)do { if ((__builtin_expect(!!(!(commandController)), 0))) { NS_DebugBreak
(NS_DEBUG_WARNING, "NS_ENSURE_TRUE(" "commandController" ") failed"
, nullptr, "/var/lib/jenkins/workspace/firefox-scan-build/dom/events/EventStateManager.cpp"
, 6828); return NS_ERROR_UNEXPECTED; } } while (false);
6829 
6830            RefPtr<nsCommandParams> params = new nsCommandParams();
6831            rv = params->SetISupports("transferable", aEvent->mTransferable);
6832            if (NS_WARN_IF(NS_FAILED(rv))NS_warn_if_impl(((bool)(__builtin_expect(!!(NS_FAILED_impl(rv
)), 0))), "NS_FAILED(rv)", "/var/lib/jenkins/workspace/firefox-scan-build/dom/events/EventStateManager.cpp"
, 6832)) {
6833              return rv;
6834            }
6835            rv = commandController->DoCommandWithParams(cmd, params);
6836          }
6837          break;
6838        }
6839 
6840        case eContentCommandLookUpDictionary: {
6841          nsCOMPtr<nsICommandController> commandController =
6842              do_QueryInterface(controller);
6843          if (NS_WARN_IF(!commandController)NS_warn_if_impl(!commandController, "!commandController", "/var/lib/jenkins/workspace/firefox-scan-build/dom/events/EventStateManager.cpp"
, 6843)) {
6844            return NS_ERROR_FAILURE;
6845          }
6846 
6847          RefPtr<nsCommandParams> params = new nsCommandParams();
6848          rv = params->SetInt("x", aEvent->mRefPoint.x);
6849          if (NS_WARN_IF(NS_FAILED(rv))NS_warn_if_impl(((bool)(__builtin_expect(!!(NS_FAILED_impl(rv
)), 0))), "NS_FAILED(rv)", "/var/lib/jenkins/workspace/firefox-scan-build/dom/events/EventStateManager.cpp"
, 6849)) {
6850            return rv;
6851          }
6852 
6853          rv = params->SetInt("y", aEvent->mRefPoint.y);
6854          if (NS_WARN_IF(NS_FAILED(rv))NS_warn_if_impl(((bool)(__builtin_expect(!!(NS_FAILED_impl(rv
)), 0))), "NS_FAILED(rv)", "/var/lib/jenkins/workspace/firefox-scan-build/dom/events/EventStateManager.cpp"
, 6854)) {
6855            return rv;
6856          }
6857 
6858          rv = commandController->DoCommandWithParams(cmd, params);
6859          break;
6860        }
6861 
6862        default:
6863          rv = controller->DoCommand(cmd);
6864          break;
6865      }
6866      NS_ENSURE_SUCCESS(rv, rv)do { nsresult __rv = rv; if (((bool)(__builtin_expect(!!(NS_FAILED_impl
(__rv)), 0)))) { const char* name = mozilla::GetStaticErrorName
(__rv); mozilla::SmprintfPointer msg = mozilla::Smprintf( "NS_ENSURE_SUCCESS(%s, %s) failed with "
 "result 0x%" "X" "%s%s%s", "rv", "rv", static_cast<uint32_t
>(__rv), name ? " (" : "", name ? name : "", name ? ")" : ""
); NS_DebugBreak(NS_DEBUG_WARNING, msg.get(), nullptr, "/var/lib/jenkins/workspace/firefox-scan-build/dom/events/EventStateManager.cpp"
, 6866); return rv; } } while (false);
6867    }
6868  }
6869  aEvent->mSucceeded = true;
6870  return NS_OK;
6871}
6872 
6873nsresult EventStateManager::DoContentCommandInsertTextEvent(
6874    WidgetContentCommandEvent* aEvent) {
6875  MOZ_ASSERT(aEvent)do { static_assert( mozilla::detail::AssertionConditionType<
decltype(aEvent)>::isValid, "invalid assertion condition")
; if ((__builtin_expect(!!(!(!!(aEvent))), 0))) { do { } while
 (false); MOZ_ReportAssertionFailure("aEvent", "/var/lib/jenkins/workspace/firefox-scan-build/dom/events/EventStateManager.cpp"
, 6875); AnnotateMozCrashReason("MOZ_ASSERT" "(" "aEvent" ")"
); do { *((volatile int*)__null) = 6875; __attribute__((nomerge
)) ::abort(); } while (false); } } while (false);
6876  MOZ_ASSERT(aEvent->mMessage == eContentCommandInsertText)do { static_assert( mozilla::detail::AssertionConditionType<
decltype(aEvent->mMessage == eContentCommandInsertText)>
::isValid, "invalid assertion condition"); if ((__builtin_expect
(!!(!(!!(aEvent->mMessage == eContentCommandInsertText))),
 0))) { do { } while (false); MOZ_ReportAssertionFailure("aEvent->mMessage == eContentCommandInsertText"
, "/var/lib/jenkins/workspace/firefox-scan-build/dom/events/EventStateManager.cpp"
, 6876); AnnotateMozCrashReason("MOZ_ASSERT" "(" "aEvent->mMessage == eContentCommandInsertText"
 ")"); do { *((volatile int*)__null) = 6876; __attribute__((nomerge
)) ::abort(); } while (false); } } while (false);
6877  MOZ_DIAGNOSTIC_ASSERT(aEvent->mString.isSome())do { static_assert( mozilla::detail::AssertionConditionType<
decltype(aEvent->mString.isSome())>::isValid, "invalid assertion condition"
); if ((__builtin_expect(!!(!(!!(aEvent->mString.isSome())
)), 0))) { do { } while (false); MOZ_ReportAssertionFailure("aEvent->mString.isSome()"
, "/var/lib/jenkins/workspace/firefox-scan-build/dom/events/EventStateManager.cpp"
, 6877); AnnotateMozCrashReason("MOZ_DIAGNOSTIC_ASSERT" "(" "aEvent->mString.isSome()"
 ")"); do { *((volatile int*)__null) = 6877; __attribute__((nomerge
)) ::abort(); } while (false); } } while (false);
6878  MOZ_DIAGNOSTIC_ASSERT(!aEvent->mString.ref().IsEmpty())do { static_assert( mozilla::detail::AssertionConditionType<
decltype(!aEvent->mString.ref().IsEmpty())>::isValid, "invalid assertion condition"
); if ((__builtin_expect(!!(!(!!(!aEvent->mString.ref().IsEmpty
()))), 0))) { do { } while (false); MOZ_ReportAssertionFailure
("!aEvent->mString.ref().IsEmpty()", "/var/lib/jenkins/workspace/firefox-scan-build/dom/events/EventStateManager.cpp"
, 6878); AnnotateMozCrashReason("MOZ_DIAGNOSTIC_ASSERT" "(" "!aEvent->mString.ref().IsEmpty()"
 ")"); do { *((volatile int*)__null) = 6878; __attribute__((nomerge
)) ::abort(); } while (false); } } while (false);
6879 
6880  aEvent->mIsEnabled = false;
6881  aEvent->mSucceeded = false;
6882 
6883  NS_ENSURE_TRUE(mPresContext, NS_ERROR_NOT_AVAILABLE)do { if ((__builtin_expect(!!(!(mPresContext)), 0))) { NS_DebugBreak
(NS_DEBUG_WARNING, "NS_ENSURE_TRUE(" "mPresContext" ") failed"
, nullptr, "/var/lib/jenkins/workspace/firefox-scan-build/dom/events/EventStateManager.cpp"
, 6883); return NS_ERROR_NOT_AVAILABLE; } } while (false);
6884 
6885  if (XRE_IsParentProcess()) {
6886    // Handle it in focused content process if there is.
6887    if (BrowserParent* remote = BrowserParent::GetFocused()) {
6888      if (!aEvent->mOnlyEnabledCheck) {
6889        remote->SendInsertText(*aEvent);
6890      }
6891      // XXX The remote process may be not editable right now.  Therefore, this
6892      // may be different from actual state in the remote process.
6893      aEvent->mIsEnabled = true;
6894      aEvent->mSucceeded = true;
6895      return NS_OK;
6896    }
6897  }
6898 
6899  // If there is no active editor in this process, we should treat the command
6900  // is disabled.
6901  RefPtr<EditorBase> activeEditor =
6902      nsContentUtils::GetActiveEditor(mPresContext);
6903  if (!activeEditor) {
6904    aEvent->mSucceeded = true;
6905    return NS_OK;
6906  }
6907 
6908  nsresult rv = activeEditor->InsertTextAsAction(aEvent->mString.ref());
6909  aEvent->mIsEnabled = rv != NS_SUCCESS_DOM_NO_OPERATION;
6910  aEvent->mSucceeded = NS_SUCCEEDED(rv)((bool)(__builtin_expect(!!(!NS_FAILED_impl(rv)), 1)));
6911  return NS_OK;
6912}
6913 
6914nsresult EventStateManager::DoContentCommandReplaceTextEvent(
6915    WidgetContentCommandEvent* aEvent) {
6916  MOZ_ASSERT(aEvent)do { static_assert( mozilla::detail::AssertionConditionType<
decltype(aEvent)>::isValid, "invalid assertion condition")
; if ((__builtin_expect(!!(!(!!(aEvent))), 0))) { do { } while
 (false); MOZ_ReportAssertionFailure("aEvent", "/var/lib/jenkins/workspace/firefox-scan-build/dom/events/EventStateManager.cpp"
, 6916); AnnotateMozCrashReason("MOZ_ASSERT" "(" "aEvent" ")"
); do { *((volatile int*)__null) = 6916; __attribute__((nomerge
)) ::abort(); } while (false); } } while (false);
6917  MOZ_ASSERT(aEvent->mMessage == eContentCommandReplaceText)do { static_assert( mozilla::detail::AssertionConditionType<
decltype(aEvent->mMessage == eContentCommandReplaceText)>
::isValid, "invalid assertion condition"); if ((__builtin_expect
(!!(!(!!(aEvent->mMessage == eContentCommandReplaceText)))
, 0))) { do { } while (false); MOZ_ReportAssertionFailure("aEvent->mMessage == eContentCommandReplaceText"
, "/var/lib/jenkins/workspace/firefox-scan-build/dom/events/EventStateManager.cpp"
, 6917); AnnotateMozCrashReason("MOZ_ASSERT" "(" "aEvent->mMessage == eContentCommandReplaceText"
 ")"); do { *((volatile int*)__null) = 6917; __attribute__((nomerge
)) ::abort(); } while (false); } } while (false);
6918  MOZ_DIAGNOSTIC_ASSERT(aEvent->mString.isSome())do { static_assert( mozilla::detail::AssertionConditionType<
decltype(aEvent->mString.isSome())>::isValid, "invalid assertion condition"
); if ((__builtin_expect(!!(!(!!(aEvent->mString.isSome())
)), 0))) { do { } while (false); MOZ_ReportAssertionFailure("aEvent->mString.isSome()"
, "/var/lib/jenkins/workspace/firefox-scan-build/dom/events/EventStateManager.cpp"
, 6918); AnnotateMozCrashReason("MOZ_DIAGNOSTIC_ASSERT" "(" "aEvent->mString.isSome()"
 ")"); do { *((volatile int*)__null) = 6918; __attribute__((nomerge
)) ::abort(); } while (false); } } while (false);
6919  MOZ_DIAGNOSTIC_ASSERT(!aEvent->mString.ref().IsEmpty())do { static_assert( mozilla::detail::AssertionConditionType<
decltype(!aEvent->mString.ref().IsEmpty())>::isValid, "invalid assertion condition"
); if ((__builtin_expect(!!(!(!!(!aEvent->mString.ref().IsEmpty
()))), 0))) { do { } while (false); MOZ_ReportAssertionFailure
("!aEvent->mString.ref().IsEmpty()", "/var/lib/jenkins/workspace/firefox-scan-build/dom/events/EventStateManager.cpp"
, 6919); AnnotateMozCrashReason("MOZ_DIAGNOSTIC_ASSERT" "(" "!aEvent->mString.ref().IsEmpty()"
 ")"); do { *((volatile int*)__null) = 6919; __attribute__((nomerge
)) ::abort(); } while (false); } } while (false);
6920 
6921  aEvent->mIsEnabled = false;
6922  aEvent->mSucceeded = false;
6923 
6924  NS_ENSURE_TRUE(mPresContext, NS_ERROR_NOT_AVAILABLE)do { if ((__builtin_expect(!!(!(mPresContext)), 0))) { NS_DebugBreak
(NS_DEBUG_WARNING, "NS_ENSURE_TRUE(" "mPresContext" ") failed"
, nullptr, "/var/lib/jenkins/workspace/firefox-scan-build/dom/events/EventStateManager.cpp"
, 6924); return NS_ERROR_NOT_AVAILABLE; } } while (false);
6925 
6926  if (XRE_IsParentProcess()) {
6927    // Handle it in focused content process if there is.
6928    if (BrowserParent* remote = BrowserParent::GetFocused()) {
6929      if (!aEvent->mOnlyEnabledCheck) {
6930        Unused << remote->SendReplaceText(*aEvent);
6931      }
6932      // XXX The remote process may be not editable right now.  Therefore, this
6933      // may be different from actual state in the remote process.
6934      aEvent->mIsEnabled = true;
6935      aEvent->mSucceeded = true;
6936      return NS_OK;
6937    }
6938  }
6939 
6940  // If there is no active editor in this process, we should treat the command
6941  // is disabled.
6942  RefPtr<EditorBase> activeEditor =
6943      nsContentUtils::GetActiveEditor(mPresContext);
6944  if (NS_WARN_IF(!activeEditor)NS_warn_if_impl(!activeEditor, "!activeEditor", "/var/lib/jenkins/workspace/firefox-scan-build/dom/events/EventStateManager.cpp"
, 6944)) {
6945    aEvent->mSucceeded = true;
6946    return NS_OK;
6947  }
6948 
6949  RefPtr<TextComposition> composition =
6950      IMEStateManager::GetTextCompositionFor(mPresContext);
6951  if (NS_WARN_IF(composition)NS_warn_if_impl(composition, "composition", "/var/lib/jenkins/workspace/firefox-scan-build/dom/events/EventStateManager.cpp"
, 6951)) {
6952    // We don't support replace text action during composition.
6953    aEvent->mSucceeded = true;
6954    return NS_OK;
6955  }
6956 
6957  ContentEventHandler handler(mPresContext);
6958  RefPtr<nsRange> range = handler.GetRangeFromFlatTextOffset(
6959      aEvent, aEvent->mSelection.mOffset,
6960      aEvent->mSelection.mReplaceSrcString.Length());
6961  if (NS_WARN_IF(!range)NS_warn_if_impl(!range, "!range", "/var/lib/jenkins/workspace/firefox-scan-build/dom/events/EventStateManager.cpp"
, 6961)) {
6962    aEvent->mSucceeded = false;
6963    return NS_OK;
6964  }
6965 
6966  // If original replacement text isn't matched with selection text, throws
6967  // error.
6968  nsAutoString targetStr;
6969  nsresult rv = handler.GenerateFlatTextContent(range, targetStr);
6970  if (NS_WARN_IF(NS_FAILED(rv))NS_warn_if_impl(((bool)(__builtin_expect(!!(NS_FAILED_impl(rv
)), 0))), "NS_FAILED(rv)", "/var/lib/jenkins/workspace/firefox-scan-build/dom/events/EventStateManager.cpp"
, 6970)) {
6971    aEvent->mSucceeded = false;
6972    return NS_OK;
6973  }
6974  if (!aEvent->mSelection.mReplaceSrcString.Equals(targetStr)) {
6975    aEvent->mSucceeded = false;
6976    return NS_OK;
6977  }
6978 
6979  rv = activeEditor->ReplaceTextAsAction(
6980      aEvent->mString.ref(), range,
6981      TextEditor::AllowBeforeInputEventCancelable::Yes,
6982      aEvent->mSelection.mPreventSetSelection
6983          ? EditorBase::PreventSetSelection::Yes
6984          : EditorBase::PreventSetSelection::No);
6985  if (NS_WARN_IF(NS_FAILED(rv))NS_warn_if_impl(((bool)(__builtin_expect(!!(NS_FAILED_impl(rv
)), 0))), "NS_FAILED(rv)", "/var/lib/jenkins/workspace/firefox-scan-build/dom/events/EventStateManager.cpp"
, 6985)) {
6986    aEvent->mSucceeded = false;
6987    return NS_OK;
6988  }
6989 
6990  aEvent->mIsEnabled = rv != NS_SUCCESS_DOM_NO_OPERATION;
6991  aEvent->mSucceeded = true;
6992  return NS_OK;
6993}
6994 
6995nsresult EventStateManager::DoContentCommandScrollEvent(
6996    WidgetContentCommandEvent* aEvent) {
6997  NS_ENSURE_TRUE(mPresContext, NS_ERROR_NOT_AVAILABLE)do { if ((__builtin_expect(!!(!(mPresContext)), 0))) { NS_DebugBreak
(NS_DEBUG_WARNING, "NS_ENSURE_TRUE(" "mPresContext" ") failed"
, nullptr, "/var/lib/jenkins/workspace/firefox-scan-build/dom/events/EventStateManager.cpp"
, 6997); return NS_ERROR_NOT_AVAILABLE; } } while (false);
6998  PresShell* presShell = mPresContext->GetPresShell();
6999  NS_ENSURE_TRUE(presShell, NS_ERROR_NOT_AVAILABLE)do { if ((__builtin_expect(!!(!(presShell)), 0))) { NS_DebugBreak
(NS_DEBUG_WARNING, "NS_ENSURE_TRUE(" "presShell" ") failed", nullptr
, "/var/lib/jenkins/workspace/firefox-scan-build/dom/events/EventStateManager.cpp"
, 6999); return NS_ERROR_NOT_AVAILABLE; } } while (false);
7000  NS_ENSURE_TRUE(aEvent->mScroll.mAmount != 0, NS_ERROR_INVALID_ARG)do { if ((__builtin_expect(!!(!(aEvent->mScroll.mAmount !=
 0)), 0))) { NS_DebugBreak(NS_DEBUG_WARNING, "NS_ENSURE_TRUE("
 "aEvent->mScroll.mAmount != 0" ") failed", nullptr, "/var/lib/jenkins/workspace/firefox-scan-build/dom/events/EventStateManager.cpp"
, 7000); return NS_ERROR_INVALID_ARG; } } while (false);
7001 
7002  ScrollUnit scrollUnit;
7003  switch (aEvent->mScroll.mUnit) {
7004    case WidgetContentCommandEvent::eCmdScrollUnit_Line:
7005      scrollUnit = ScrollUnit::LINES;
7006      break;
7007    case WidgetContentCommandEvent::eCmdScrollUnit_Page:
7008      scrollUnit = ScrollUnit::PAGES;
7009      break;
7010    case WidgetContentCommandEvent::eCmdScrollUnit_Whole:
7011      scrollUnit = ScrollUnit::WHOLE;
7012      break;
7013    default:
7014      return NS_ERROR_INVALID_ARG;
7015  }
7016 
7017  aEvent->mSucceeded = true;
7018 
7019  ScrollContainerFrame* sf =
7020      presShell->GetScrollContainerFrameToScroll(layers::EitherScrollDirection);
7021  aEvent->mIsEnabled =
7022      sf ? (aEvent->mScroll.mIsHorizontal ? WheelHandlingUtils::CanScrollOn(
7023                                                sf, aEvent->mScroll.mAmount, 0)
7024                                          : WheelHandlingUtils::CanScrollOn(
7025                                                sf, 0, aEvent->mScroll.mAmount))
7026         : false;
7027 
7028  if (!aEvent->mIsEnabled || aEvent->mOnlyEnabledCheck) {
7029    return NS_OK;
7030  }
7031 
7032  nsIntPoint pt(0, 0);
7033  if (aEvent->mScroll.mIsHorizontal) {
7034    pt.x = aEvent->mScroll.mAmount;
7035  } else {
7036    pt.y = aEvent->mScroll.mAmount;
7037  }
7038 
7039  // The caller may want synchronous scrolling.
7040  sf->ScrollBy(pt, scrollUnit, ScrollMode::Instant);
7041  return NS_OK;
7042}
7043 
7044void EventStateManager::SetActiveManager(EventStateManager* aNewESM,
7045                                         nsIContent* aContent) {
7046  if (sActiveESM && aNewESM != sActiveESM) {
7047    sActiveESM->SetContentState(nullptr, ElementState::ACTIVE);
7048  }
7049  sActiveESM = aNewESM;
7050  if (sActiveESM && aContent) {
7051    sActiveESM->SetContentState(aContent, ElementState::ACTIVE);
7052  }
7053}
7054 
7055void EventStateManager::ClearGlobalActiveContent(EventStateManager* aClearer) {
7056  if (aClearer) {
7057    aClearer->SetContentState(nullptr, ElementState::ACTIVE);
7058    if (sDragOverContent) {
7059      aClearer->SetContentState(nullptr, ElementState::DRAGOVER);
7060    }
7061  }
7062  if (sActiveESM && aClearer != sActiveESM) {
7063    sActiveESM->SetContentState(nullptr, ElementState::ACTIVE);
7064  }
7065  sActiveESM = nullptr;
7066}
7067 
7068/******************************************************************/
7069/* mozilla::EventStateManager::DeltaAccumulator                   */
7070/******************************************************************/
7071 
7072void EventStateManager::DeltaAccumulator::InitLineOrPageDelta(
7073    nsIFrame* aTargetFrame, EventStateManager* aESM, WidgetWheelEvent* aEvent) {
7074  MOZ_ASSERT(aESM)do { static_assert( mozilla::detail::AssertionConditionType<
decltype(aESM)>::isValid, "invalid assertion condition"); if
 ((__builtin_expect(!!(!(!!(aESM))), 0))) { do { } while (false
); MOZ_ReportAssertionFailure("aESM", "/var/lib/jenkins/workspace/firefox-scan-build/dom/events/EventStateManager.cpp"
, 7074); AnnotateMozCrashReason("MOZ_ASSERT" "(" "aESM" ")");
 do { *((volatile int*)__null) = 7074; __attribute__((nomerge
)) ::abort(); } while (false); } } while (false);
7075  MOZ_ASSERT(aEvent)do { static_assert( mozilla::detail::AssertionConditionType<
decltype(aEvent)>::isValid, "invalid assertion condition")
; if ((__builtin_expect(!!(!(!!(aEvent))), 0))) { do { } while
 (false); MOZ_ReportAssertionFailure("aEvent", "/var/lib/jenkins/workspace/firefox-scan-build/dom/events/EventStateManager.cpp"
, 7075); AnnotateMozCrashReason("MOZ_ASSERT" "(" "aEvent" ")"
); do { *((volatile int*)__null) = 7075; __attribute__((nomerge
)) ::abort(); } while (false); } } while (false);
7076 
7077  // Reset if the previous wheel event is too old.
7078  if (!mLastTime.IsNull()) {
7079    TimeDuration duration = TimeStamp::Now() - mLastTime;
7080    if (duration.ToMilliseconds() >
7081        StaticPrefs::mousewheel_transaction_timeout()) {
7082      Reset();
7083    }
7084  }
7085  // If we have accumulated delta,  we may need to reset it.
7086  if (IsInTransaction()) {
7087    // If wheel event type is changed, reset the values.
7088    if (mHandlingDeltaMode != aEvent->mDeltaMode ||
7089        mIsNoLineOrPageDeltaDevice != aEvent->mIsNoLineOrPageDelta) {
7090      Reset();
7091    } else {
7092      // If the delta direction is changed, we should reset only the
7093      // accumulated values.
7094      if (mX && aEvent->mDeltaX && ((aEvent->mDeltaX > 0.0) != (mX > 0.0))) {
7095        mX = mPendingScrollAmountX = 0.0;
7096      }
7097      if (mY && aEvent->mDeltaY && ((aEvent->mDeltaY > 0.0) != (mY > 0.0))) {
7098        mY = mPendingScrollAmountY = 0.0;
7099      }
7100    }
7101  }
7102 
7103  mHandlingDeltaMode = aEvent->mDeltaMode;
7104  mIsNoLineOrPageDeltaDevice = aEvent->mIsNoLineOrPageDelta;
7105 
7106  {
7107    ScrollContainerFrame* scrollTarget = aESM->ComputeScrollTarget(
7108        aTargetFrame, aEvent, COMPUTE_DEFAULT_ACTION_TARGET);
7109    nsPresContext* pc = scrollTarget ? scrollTarget->PresContext()
7110                                     : aTargetFrame->PresContext();
7111    aEvent->mScrollAmount = aESM->GetScrollAmount(pc, aEvent, scrollTarget);
7112  }
7113 
7114  // If it's handling neither a device that does not provide line or page deltas
7115  // nor delta values multiplied by prefs, we must not modify lineOrPageDelta
7116  // values.
7117  // TODO(emilio): Does this care about overridden scroll speed?
7118  if (!mIsNoLineOrPageDeltaDevice &&
7119      !EventStateManager::WheelPrefs::GetInstance()
7120           ->NeedToComputeLineOrPageDelta(aEvent)) {
7121    // Set the delta values to mX and mY.  They would be used when above block
7122    // resets mX/mY/mPendingScrollAmountX/mPendingScrollAmountY if the direction
7123    // is changed.
7124    // NOTE: We shouldn't accumulate the delta values, it might could cause
7125    //       overflow even though it's not a realistic situation.
7126    if (aEvent->mDeltaX) {
7127      mX = aEvent->mDeltaX;
7128    }
7129    if (aEvent->mDeltaY) {
7130      mY = aEvent->mDeltaY;
7131    }
7132    mLastTime = TimeStamp::Now();
7133    return;
7134  }
7135 
7136  mX += aEvent->mDeltaX;
7137  mY += aEvent->mDeltaY;
7138 
7139  if (mHandlingDeltaMode == WheelEvent_Binding::DOM_DELTA_PIXEL) {
7140    // Records pixel delta values and init mLineOrPageDeltaX and
7141    // mLineOrPageDeltaY for wheel events which are caused by pixel only
7142    // devices.  Ignore mouse wheel transaction for computing this.  The
7143    // lineOrPageDelta values will be used by dispatching legacy
7144    // eMouseScrollEventClass (DOMMouseScroll) but not be used for scrolling
7145    // of default action.  The transaction should be used only for the default
7146    // action.
7147    auto scrollAmountInCSSPixels =
7148        CSSIntSize::FromAppUnitsRounded(aEvent->mScrollAmount);
7149 
7150    aEvent->mLineOrPageDeltaX = RoundDown(mX) / scrollAmountInCSSPixels.width;
7151    aEvent->mLineOrPageDeltaY = RoundDown(mY) / scrollAmountInCSSPixels.height;
7152 
7153    mX -= aEvent->mLineOrPageDeltaX * scrollAmountInCSSPixels.width;
7154    mY -= aEvent->mLineOrPageDeltaY * scrollAmountInCSSPixels.height;
7155  } else {
7156    aEvent->mLineOrPageDeltaX = RoundDown(mX);
7157    aEvent->mLineOrPageDeltaY = RoundDown(mY);
7158    mX -= aEvent->mLineOrPageDeltaX;
7159    mY -= aEvent->mLineOrPageDeltaY;
7160  }
7161 
7162  mLastTime = TimeStamp::Now();
7163}
7164 
7165void EventStateManager::DeltaAccumulator::Reset() {
7166  mX = mY = 0.0;
7167  mPendingScrollAmountX = mPendingScrollAmountY = 0.0;
7168  mHandlingDeltaMode = UINT32_MAX(4294967295U);
7169  mIsNoLineOrPageDeltaDevice = false;
7170}
7171 
7172nsIntPoint
7173EventStateManager::DeltaAccumulator::ComputeScrollAmountForDefaultAction(
7174    WidgetWheelEvent* aEvent, const nsIntSize& aScrollAmountInDevPixels) {
7175  MOZ_ASSERT(aEvent)do { static_assert( mozilla::detail::AssertionConditionType<
decltype(aEvent)>::isValid, "invalid assertion condition")
; if ((__builtin_expect(!!(!(!!(aEvent))), 0))) { do { } while
 (false); MOZ_ReportAssertionFailure("aEvent", "/var/lib/jenkins/workspace/firefox-scan-build/dom/events/EventStateManager.cpp"
, 7175); AnnotateMozCrashReason("MOZ_ASSERT" "(" "aEvent" ")"
); do { *((volatile int*)__null) = 7175; __attribute__((nomerge
)) ::abort(); } while (false); } } while (false);
7176 
7177  DeltaValues acceleratedDelta = WheelTransaction::AccelerateWheelDelta(aEvent);
7178 
7179  nsIntPoint result(0, 0);
7180  if (aEvent->mDeltaMode == WheelEvent_Binding::DOM_DELTA_PIXEL) {
7181    mPendingScrollAmountX += acceleratedDelta.deltaX;
7182    mPendingScrollAmountY += acceleratedDelta.deltaY;
7183  } else {
7184    mPendingScrollAmountX +=
7185        aScrollAmountInDevPixels.width * acceleratedDelta.deltaX;
7186    mPendingScrollAmountY +=
7187        aScrollAmountInDevPixels.height * acceleratedDelta.deltaY;
7188  }
7189  result.x = RoundDown(mPendingScrollAmountX);
7190  result.y = RoundDown(mPendingScrollAmountY);
7191  mPendingScrollAmountX -= result.x;
7192  mPendingScrollAmountY -= result.y;
7193 
7194  return result;
7195}
7196 
7197/******************************************************************/
7198/* mozilla::EventStateManager::WheelPrefs                         */
7199/******************************************************************/
7200 
7201// static
7202EventStateManager::WheelPrefs* EventStateManager::WheelPrefs::GetInstance() {
7203  if (!sInstance) {
7204    sInstance = new WheelPrefs();
7205  }
7206  return sInstance;
7207}
7208 
7209// static
7210void EventStateManager::WheelPrefs::Shutdown() {
7211  delete sInstance;
7212  sInstance = nullptr;
7213}
7214 
7215// static
7216void EventStateManager::WheelPrefs::OnPrefChanged(const char* aPrefName,
7217                                                  void* aClosure) {
7218  // forget all prefs, it's not problem for performance.
7219  sInstance->Reset();
7220  DeltaAccumulator::GetInstance()->Reset();
7221}
7222 
7223EventStateManager::WheelPrefs::WheelPrefs() {
7224  Reset();
7225  Preferences::RegisterPrefixCallback(OnPrefChanged, "mousewheel.");
7226}
7227 
7228EventStateManager::WheelPrefs::~WheelPrefs() {
7229  Preferences::UnregisterPrefixCallback(OnPrefChanged, "mousewheel.");
7230}
7231 
7232void EventStateManager::WheelPrefs::Reset() { memset(mInit, 0, sizeof(mInit)); }
7233 
7234EventStateManager::WheelPrefs::Index EventStateManager::WheelPrefs::GetIndexFor(
7235    const WidgetWheelEvent* aEvent) {
7236  if (!aEvent) {
7237    return INDEX_DEFAULT;
7238  }
7239 
7240  Modifiers modifiers = (aEvent->mModifiers & (MODIFIER_ALT | MODIFIER_CONTROL |
7241                                               MODIFIER_META | MODIFIER_SHIFT));
7242 
7243  switch (modifiers) {
7244    case MODIFIER_ALT:
7245      return INDEX_ALT;
7246    case MODIFIER_CONTROL:
7247      return INDEX_CONTROL;
7248    case MODIFIER_META:
7249      return INDEX_META;
7250    case MODIFIER_SHIFT:
7251      return INDEX_SHIFT;
7252    default:
7253      // If two or more modifier keys are pressed, we should use default
7254      // settings.
7255      return INDEX_DEFAULT;
7256  }
7257}
7258 
7259void EventStateManager::WheelPrefs::GetBasePrefName(
7260    EventStateManager::WheelPrefs::Index aIndex, nsACString& aBasePrefName) {
7261  aBasePrefName.AssignLiteral("mousewheel.");
7262  switch (aIndex) {
7263    case INDEX_ALT:
7264      aBasePrefName.AppendLiteral("with_alt.");
7265      break;
7266    case INDEX_CONTROL:
7267      aBasePrefName.AppendLiteral("with_control.");
7268      break;
7269    case INDEX_META:
7270      aBasePrefName.AppendLiteral("with_meta.");
7271      break;
7272    case INDEX_SHIFT:
7273      aBasePrefName.AppendLiteral("with_shift.");
7274      break;
7275    case INDEX_DEFAULT:
7276    default:
7277      aBasePrefName.AppendLiteral("default.");
7278      break;
7279  }
7280}
7281 
7282void EventStateManager::WheelPrefs::Init(
7283    EventStateManager::WheelPrefs::Index aIndex) {
7284  if (mInit[aIndex]) {
7285    return;
7286  }
7287  mInit[aIndex] = true;
7288 
7289  nsAutoCString basePrefName;
7290  GetBasePrefName(aIndex, basePrefName);
7291 
7292  nsAutoCString prefNameX(basePrefName);
7293  prefNameX.AppendLiteral("delta_multiplier_x");
7294  mMultiplierX[aIndex] =
7295      static_cast<double>(Preferences::GetInt(prefNameX.get(), 100)) / 100;
7296 
7297  nsAutoCString prefNameY(basePrefName);
7298  prefNameY.AppendLiteral("delta_multiplier_y");
7299  mMultiplierY[aIndex] =
7300      static_cast<double>(Preferences::GetInt(prefNameY.get(), 100)) / 100;
7301 
7302  nsAutoCString prefNameZ(basePrefName);
7303  prefNameZ.AppendLiteral("delta_multiplier_z");
7304  mMultiplierZ[aIndex] =
7305      static_cast<double>(Preferences::GetInt(prefNameZ.get(), 100)) / 100;
7306 
7307  nsAutoCString prefNameAction(basePrefName);
7308  prefNameAction.AppendLiteral("action");
7309  int32_t action = Preferences::GetInt(prefNameAction.get(), ACTION_SCROLL);
7310  if (action < int32_t(ACTION_NONE) || action > int32_t(ACTION_LAST)) {
7311    NS_WARNING("Unsupported action pref value, replaced with 'Scroll'.")NS_DebugBreak(NS_DEBUG_WARNING, "Unsupported action pref value, replaced with 'Scroll'."
, nullptr, "/var/lib/jenkins/workspace/firefox-scan-build/dom/events/EventStateManager.cpp"
, 7311);
7312    action = ACTION_SCROLL;
7313  }
7314  mActions[aIndex] = static_cast<Action>(action);
7315 
7316  // Compute action values overridden by .override_x pref.
7317  // At present, override is possible only for the x-direction
7318  // because this pref is introduced mainly for tilt wheels.
7319  // Note that ACTION_HORIZONTALIZED_SCROLL isn't a valid value for this pref
7320  // because it affects only to deltaY.
7321  prefNameAction.AppendLiteral(".override_x");
7322  int32_t actionOverrideX = Preferences::GetInt(prefNameAction.get(), -1);
7323  if (actionOverrideX < -1 || actionOverrideX > int32_t(ACTION_LAST) ||
7324      actionOverrideX == ACTION_HORIZONTALIZED_SCROLL) {
7325    NS_WARNING("Unsupported action override pref value, didn't override.")NS_DebugBreak(NS_DEBUG_WARNING, "Unsupported action override pref value, didn't override."
, nullptr, "/var/lib/jenkins/workspace/firefox-scan-build/dom/events/EventStateManager.cpp"
, 7325);
7326    actionOverrideX = -1;
7327  }
7328  mOverriddenActionsX[aIndex] = (actionOverrideX == -1)
7329                                    ? static_cast<Action>(action)
7330                                    : static_cast<Action>(actionOverrideX);
7331}
7332 
7333void EventStateManager::WheelPrefs::GetMultiplierForDeltaXAndY(
7334    const WidgetWheelEvent* aEvent, Index aIndex, double* aMultiplierForDeltaX,
7335    double* aMultiplierForDeltaY) {
7336  *aMultiplierForDeltaX = mMultiplierX[aIndex];
7337  *aMultiplierForDeltaY = mMultiplierY[aIndex];
7338  // If the event has been horizontalized(I.e. treated as a horizontal wheel
7339  // scroll for a vertical wheel scroll), then we should swap mMultiplierX and
7340  // mMultiplierY. By doing this, multipliers will still apply to the delta
7341  // values they origianlly corresponded to.
7342  if (aEvent->mDeltaValuesHorizontalizedForDefaultHandler &&
7343      ComputeActionFor(aEvent) == ACTION_HORIZONTALIZED_SCROLL) {
7344    std::swap(*aMultiplierForDeltaX, *aMultiplierForDeltaY);
7345  }
7346}
7347 
7348void EventStateManager::WheelPrefs::ApplyUserPrefsToDelta(
7349    WidgetWheelEvent* aEvent) {
7350  if (aEvent->mCustomizedByUserPrefs) {
7351    return;
7352  }
7353 
7354  Index index = GetIndexFor(aEvent);
7355  Init(index);
7356 
7357  double multiplierForDeltaX = 1.0, multiplierForDeltaY = 1.0;
7358  GetMultiplierForDeltaXAndY(aEvent, index, &multiplierForDeltaX,
7359                             &multiplierForDeltaY);
7360  aEvent->mDeltaX *= multiplierForDeltaX;
7361  aEvent->mDeltaY *= multiplierForDeltaY;
7362  aEvent->mDeltaZ *= mMultiplierZ[index];
7363 
7364  // If the multiplier is 1.0 or -1.0, i.e., it doesn't change the absolute
7365  // value, we should use lineOrPageDelta values which were set by widget.
7366  // Otherwise, we need to compute them from accumulated delta values.
7367  if (!NeedToComputeLineOrPageDelta(aEvent)) {
7368    aEvent->mLineOrPageDeltaX *= static_cast<int32_t>(multiplierForDeltaX);
7369    aEvent->mLineOrPageDeltaY *= static_cast<int32_t>(multiplierForDeltaY);
7370  } else {
7371    aEvent->mLineOrPageDeltaX = 0;
7372    aEvent->mLineOrPageDeltaY = 0;
7373  }
7374 
7375  aEvent->mCustomizedByUserPrefs =
7376      ((mMultiplierX[index] != 1.0) || (mMultiplierY[index] != 1.0) ||
7377       (mMultiplierZ[index] != 1.0));
7378}
7379 
7380void EventStateManager::WheelPrefs::CancelApplyingUserPrefsFromOverflowDelta(
7381    WidgetWheelEvent* aEvent) {
7382  Index index = GetIndexFor(aEvent);
7383  Init(index);
7384 
7385  // XXX If the multiplier pref value is negative, the scroll direction was
7386  //     changed and caused to scroll different direction.  In such case,
7387  //     this method reverts the sign of overflowDelta.  Does it make widget
7388  //     happy?  Although, widget can know the pref applied delta values by
7389  //     referrencing the deltaX and deltaY of the event.
7390 
7391  double multiplierForDeltaX = 1.0, multiplierForDeltaY = 1.0;
7392  GetMultiplierForDeltaXAndY(aEvent, index, &multiplierForDeltaX,
7393                             &multiplierForDeltaY);
7394  if (multiplierForDeltaX) {
7395    aEvent->mOverflowDeltaX /= multiplierForDeltaX;
7396  }
7397  if (multiplierForDeltaY) {
7398    aEvent->mOverflowDeltaY /= multiplierForDeltaY;
7399  }
7400}
7401 
7402EventStateManager::WheelPrefs::Action
7403EventStateManager::WheelPrefs::ComputeActionFor(
7404    const WidgetWheelEvent* aEvent) {
7405  Index index = GetIndexFor(aEvent);
7406  Init(index);
7407 
7408  bool deltaXPreferred = (Abs(aEvent->mDeltaX) > Abs(aEvent->mDeltaY) &&
7409                          Abs(aEvent->mDeltaX) > Abs(aEvent->mDeltaZ));
7410  Action* actions = deltaXPreferred ? mOverriddenActionsX : mActions;
7411  if (actions[index] == ACTION_NONE || actions[index] == ACTION_SCROLL ||
7412      actions[index] == ACTION_HORIZONTALIZED_SCROLL) {
7413    return actions[index];
7414  }
7415 
7416  // Momentum events shouldn't run special actions.
7417  if (aEvent->mIsMomentum) {
7418    // Use the default action.  Note that user might kill the wheel scrolling.
7419    Init(INDEX_DEFAULT);
7420    if (actions[INDEX_DEFAULT] == ACTION_SCROLL ||
7421        actions[INDEX_DEFAULT] == ACTION_HORIZONTALIZED_SCROLL) {
7422      return actions[INDEX_DEFAULT];
7423    }
7424    return ACTION_NONE;
7425  }
7426 
7427  return actions[index];
7428}
7429 
7430bool EventStateManager::WheelPrefs::NeedToComputeLineOrPageDelta(
7431    const WidgetWheelEvent* aEvent) {
7432  Index index = GetIndexFor(aEvent);
7433  Init(index);
7434 
7435  return (mMultiplierX[index] != 1.0 && mMultiplierX[index] != -1.0) ||
7436         (mMultiplierY[index] != 1.0 && mMultiplierY[index] != -1.0);
7437}
7438 
7439void EventStateManager::WheelPrefs::GetUserPrefsForEvent(
7440    const WidgetWheelEvent* aEvent, double* aOutMultiplierX,
7441    double* aOutMultiplierY) {
7442  Index index = GetIndexFor(aEvent);
7443  Init(index);
7444 
7445  double multiplierForDeltaX = 1.0, multiplierForDeltaY = 1.0;
7446  GetMultiplierForDeltaXAndY(aEvent, index, &multiplierForDeltaX,
7447                             &multiplierForDeltaY);
7448  *aOutMultiplierX = multiplierForDeltaX;
7449  *aOutMultiplierY = multiplierForDeltaY;
7450}
7451 
7452// static
7453Maybe<layers::APZWheelAction> EventStateManager::APZWheelActionFor(
7454    const WidgetWheelEvent* aEvent) {
7455  if (aEvent->mMessage != eWheel) {
7456    return Nothing();
7457  }
7458  WheelPrefs::Action action =
7459      WheelPrefs::GetInstance()->ComputeActionFor(aEvent);
7460  switch (action) {
7461    case WheelPrefs::ACTION_SCROLL:
7462    case WheelPrefs::ACTION_HORIZONTALIZED_SCROLL:
7463      return Some(layers::APZWheelAction::Scroll);
7464    case WheelPrefs::ACTION_PINCH_ZOOM:
7465      return Some(layers::APZWheelAction::PinchZoom);
7466    default:
7467      return Nothing();
7468  }
7469}
7470 
7471// static
7472WheelDeltaAdjustmentStrategy EventStateManager::GetWheelDeltaAdjustmentStrategy(
7473    const WidgetWheelEvent& aEvent) {
7474  if (aEvent.mMessage != eWheel) {
7475    return WheelDeltaAdjustmentStrategy::eNone;
7476  }
7477  switch (WheelPrefs::GetInstance()->ComputeActionFor(&aEvent)) {
7478    case WheelPrefs::ACTION_SCROLL:
7479      if (StaticPrefs::mousewheel_autodir_enabled() && 0 == aEvent.mDeltaZ) {
7480        if (StaticPrefs::mousewheel_autodir_honourroot()) {
7481          return WheelDeltaAdjustmentStrategy::eAutoDirWithRootHonour;
7482        }
7483        return WheelDeltaAdjustmentStrategy::eAutoDir;
7484      }
7485      return WheelDeltaAdjustmentStrategy::eNone;
7486    case WheelPrefs::ACTION_HORIZONTALIZED_SCROLL:
7487      return WheelDeltaAdjustmentStrategy::eHorizontalize;
7488    default:
7489      break;
7490  }
7491  return WheelDeltaAdjustmentStrategy::eNone;
7492}
7493 
7494void EventStateManager::GetUserPrefsForWheelEvent(
7495    const WidgetWheelEvent* aEvent, double* aOutMultiplierX,
7496    double* aOutMultiplierY) {
7497  WheelPrefs::GetInstance()->GetUserPrefsForEvent(aEvent, aOutMultiplierX,
7498                                                  aOutMultiplierY);
7499}
7500 
7501bool EventStateManager::WheelPrefs::IsOverOnePageScrollAllowedX(
7502    const WidgetWheelEvent* aEvent) {
7503  Index index = GetIndexFor(aEvent);
7504  Init(index);
7505  return Abs(mMultiplierX[index]) >=
7506         MIN_MULTIPLIER_VALUE_ALLOWING_OVER_ONE_PAGE_SCROLL;
7507}
7508 
7509bool EventStateManager::WheelPrefs::IsOverOnePageScrollAllowedY(
7510    const WidgetWheelEvent* aEvent) {
7511  Index index = GetIndexFor(aEvent);
7512  Init(index);
7513  return Abs(mMultiplierY[index]) >=
7514         MIN_MULTIPLIER_VALUE_ALLOWING_OVER_ONE_PAGE_SCROLL;
7515}
7516 
7517}  // namespace mozilla

←

/var/lib/jenkins/workspace/firefox-scan-build/obj-x86_64-pc-linux-gnu/dist/include/mozilla/Maybe.h

→

1/* -*- Mode: C++; tab-width: 2; indent-tabs-mode: nil; c-basic-offset: 2 -*- */
2/* vim: set ts=8 sts=2 et sw=2 tw=80: */
3/* This Source Code Form is subject to the terms of the Mozilla Public
* License, v. 2.0. If a copy of the MPL was not distributed with this
* file, You can obtain one at http://mozilla.org/MPL/2.0/. */

7/* A class for optional values and in-place lazy construction. */

9#ifndef mozilla_Maybe_h
10#define mozilla_Maybe_h

12#include <functional>
13#include <new>  // for placement new
14#include <ostream>
15#include <type_traits>
16#include <utility>

18#include "mozilla/Alignment.h"
19#include "mozilla/Assertions.h"
20#include "mozilla/Attributes.h"
21#include "mozilla/MaybeStorageBase.h"
22#include "mozilla/MemoryChecking.h"
23#include "mozilla/OperatorNewExtensions.h"
24#include "mozilla/Poison.h"
25#include "mozilla/ThreadSafety.h"

27class nsCycleCollectionTraversalCallback;

29template <typename T>
30inline void CycleCollectionNoteChild(
  nsCycleCollectionTraversalCallback& aCallback, T* aChild, const char* aName,
  uint32_t aFlags);

34namespace mozilla {

36struct Nothing {};

38inline constexpr bool operator==(const Nothing&, const Nothing&) {
return true;
40}

42template <class T>
43class Maybe;

45namespace detail {

47// You would think that poisoning Maybe instances could just be a call
48// to mozWritePoison.  Unfortunately, using a simple call to
49// mozWritePoison generates poor code on MSVC for small structures.  The
50// generated code contains (always not-taken) branches and does a bunch
51// of setup for `rep stos{l,q}`, even though we know at compile time
52// exactly how many words we're poisoning.  Instead, we're going to
53// force MSVC to generate the code we want via recursive templates.

55// Write the given poisonValue into p at offset*sizeof(uintptr_t).
56template <size_t offset>
57inline void WritePoisonAtOffset(void* p, const uintptr_t poisonValue) {
memcpy(static_cast<char*>(p) + offset * sizeof(poisonValue), &poisonValue,
       sizeof(poisonValue));
60}

62template <size_t Offset, size_t NOffsets>
63struct InlinePoisoner {
static void poison(void* p, const uintptr_t poisonValue) {
  WritePoisonAtOffset<Offset>(p, poisonValue);
  InlinePoisoner<Offset + 1, NOffsets>::poison(p, poisonValue);
}
68};

70template <size_t N>
71struct InlinePoisoner<N, N> {
static void poison(void*, const uintptr_t) {
  // All done!
}
75};

77// We can't generate inline code for large structures, though, because we'll
78// blow out recursive template instantiation limits, and the code would be
79// bloated to boot.  So provide a fallback to the out-of-line poisoner.
80template <size_t ObjectSize>
81struct OutOfLinePoisoner {
static MOZ_NEVER_INLINE__attribute__((noinline)) void poison(void* p, const uintptr_t) {
  mozWritePoison(p, ObjectSize);
}
85};

87template <typename T>
88inline void PoisonObject(T* p) {
const uintptr_t POISON = mozPoisonValue();
std::conditional_t<(sizeof(T) <= 8 * sizeof(POISON)),
                   InlinePoisoner<0, sizeof(T) / sizeof(POISON)>,
                   OutOfLinePoisoner<sizeof(T)>>::poison(p, POISON);
93}

95template <typename T>
96struct MaybePoisoner {
static const size_t N = sizeof(T);

static void poison(void* aPtr) {
100#ifdef MOZ_DIAGNOSTIC_ASSERT_ENABLED1
  if (N >= sizeof(uintptr_t)) {
    PoisonObject(static_cast<std::remove_cv_t<T>*>(aPtr));
  }
104#endif
  MOZ_MAKE_MEM_UNDEFINED(aPtr, N)do { } while (0);
}
107};

109template <typename T,
        bool TriviallyDestructibleAndCopyable =
            IsTriviallyDestructibleAndCopyable<T>,
        bool Copyable = std::is_copy_constructible_v<T>,
        bool Movable = std::is_move_constructible_v<T>>
114class Maybe_CopyMove_Enabler;

116#define MOZ_MAYBE_COPY_OPS()                                                \
Maybe_CopyMove_Enabler(const Maybe_CopyMove_Enabler& aOther) {            \
  if (downcast(aOther).isSome()) {                                        \
    downcast(*this).emplace(*downcast(aOther));                           \
  }                                                                       \
}                                                                         \
                                                                          \
Maybe_CopyMove_Enabler& operator=(const Maybe_CopyMove_Enabler& aOther) { \
  return downcast(*this).template operator= <T>(downcast(aOther));        \
}

127#define MOZ_MAYBE_MOVE_OPS()                                             \
constexpr Maybe_CopyMove_Enabler(Maybe_CopyMove_Enabler&& aOther) {    \
  if (downcast(aOther).isSome()) {                                     \
    downcast(*this).emplace(std::move(*downcast(aOther)));             \
    downcast(aOther).reset();                                          \
  }                                                                    \
}                                                                      \
                                                                       \
constexpr Maybe_CopyMove_Enabler& operator=(                           \
    Maybe_CopyMove_Enabler&& aOther) {                                 \
  downcast(*this).template operator= <T>(std::move(downcast(aOther))); \
                                                                       \
  return *this;                                                        \
}

142#define MOZ_MAYBE_DOWNCAST()                                          \
static constexpr Maybe<T>& downcast(Maybe_CopyMove_Enabler& aObj) { \
  return static_cast<Maybe<T>&>(aObj);                              \
}                                                                   \
static constexpr const Maybe<T>& downcast(                          \
    const Maybe_CopyMove_Enabler& aObj) {                           \
  return static_cast<const Maybe<T>&>(aObj);                        \
}

151template <typename T>
152class Maybe_CopyMove_Enabler<T, true, true, true> {
public:
Maybe_CopyMove_Enabler() = default;

Maybe_CopyMove_Enabler(const Maybe_CopyMove_Enabler&) = default;
Maybe_CopyMove_Enabler& operator=(const Maybe_CopyMove_Enabler&) = default;
constexpr Maybe_CopyMove_Enabler(Maybe_CopyMove_Enabler&& aOther) {
  downcast(aOther).reset();
}
constexpr Maybe_CopyMove_Enabler& operator=(Maybe_CopyMove_Enabler&& aOther) {
  downcast(aOther).reset();
  return *this;
}

private:
MOZ_MAYBE_DOWNCAST()
168};

170template <typename T>
171class Maybe_CopyMove_Enabler<T, true, false, true> {
public:
Maybe_CopyMove_Enabler() = default;

Maybe_CopyMove_Enabler(const Maybe_CopyMove_Enabler&) = delete;
Maybe_CopyMove_Enabler& operator=(const Maybe_CopyMove_Enabler&) = delete;
constexpr Maybe_CopyMove_Enabler(Maybe_CopyMove_Enabler&& aOther) {
  downcast(aOther).reset();
}
constexpr Maybe_CopyMove_Enabler& operator=(Maybe_CopyMove_Enabler&& aOther) {
  downcast(aOther).reset();
  return *this;
}

private:
MOZ_MAYBE_DOWNCAST()
187};

189template <typename T>
190class Maybe_CopyMove_Enabler<T, false, true, true> {
public:
Maybe_CopyMove_Enabler() = default;

MOZ_MAYBE_COPY_OPS()
MOZ_MAYBE_MOVE_OPS()

private:
MOZ_MAYBE_DOWNCAST()
199};

201template <typename T>
202class Maybe_CopyMove_Enabler<T, false, false, true> {
public:
Maybe_CopyMove_Enabler() = default;

Maybe_CopyMove_Enabler(const Maybe_CopyMove_Enabler&) = delete;
Maybe_CopyMove_Enabler& operator=(const Maybe_CopyMove_Enabler&) = delete;
MOZ_MAYBE_MOVE_OPS()

private:
MOZ_MAYBE_DOWNCAST()
212};

214template <typename T>
215class Maybe_CopyMove_Enabler<T, false, true, false> {
public:
Maybe_CopyMove_Enabler() = default;

MOZ_MAYBE_COPY_OPS()
Maybe_CopyMove_Enabler(Maybe_CopyMove_Enabler&&) = delete;
Maybe_CopyMove_Enabler& operator=(Maybe_CopyMove_Enabler&&) = delete;

private:
MOZ_MAYBE_DOWNCAST()
225};

227template <typename T, bool TriviallyDestructibleAndCopyable>
228class Maybe_CopyMove_Enabler<T, TriviallyDestructibleAndCopyable, false,
                           false> {
public:
Maybe_CopyMove_Enabler() = default;

Maybe_CopyMove_Enabler(const Maybe_CopyMove_Enabler&) = delete;
Maybe_CopyMove_Enabler& operator=(const Maybe_CopyMove_Enabler&) = delete;
Maybe_CopyMove_Enabler(Maybe_CopyMove_Enabler&&) = delete;
Maybe_CopyMove_Enabler& operator=(Maybe_CopyMove_Enabler&&) = delete;
237};

239#undef MOZ_MAYBE_COPY_OPS
240#undef MOZ_MAYBE_MOVE_OPS
241#undef MOZ_MAYBE_DOWNCAST

243template <typename T, bool TriviallyDestructibleAndCopyable =
                        IsTriviallyDestructibleAndCopyable<T>>
245struct MaybeStorage;

247template <typename T>
248struct MaybeStorage<T, false> : MaybeStorageBase<T> {
protected:
char mIsSome = false;  // not bool -- guarantees minimal space consumption

MaybeStorage() = default;
24
←
Calling defaulted default constructor for 'MaybeStorageBase<mozilla::WidgetMouseEvent, false>'→
29
←
Returning from default constructor for 'MaybeStorageBase<mozilla::WidgetMouseEvent, false>'→
30
←
Returning without writing to 'this->mStorage.val.mClickTarget.mRawPtr'→
explicit MaybeStorage(const T& aVal)
    : MaybeStorageBase<T>{aVal}, mIsSome{true} {}
explicit MaybeStorage(T&& aVal)
    : MaybeStorageBase<T>{std::move(aVal)}, mIsSome{true} {}

template <typename... Args>
explicit MaybeStorage(std::in_place_t, Args&&... aArgs)
    : MaybeStorageBase<T>{std::in_place, std::forward<Args>(aArgs)...},
      mIsSome{true} {}

public:
// Copy and move operations are no-ops, since copying is moving is implemented
// by Maybe_CopyMove_Enabler.

MaybeStorage(const MaybeStorage&) : MaybeStorageBase<T>{} {}
MaybeStorage& operator=(const MaybeStorage&) { return *this; }
MaybeStorage(MaybeStorage&&) : MaybeStorageBase<T>{} {}
MaybeStorage& operator=(MaybeStorage&&) { return *this; }

~MaybeStorage() {
  if (mIsSome42.1
Field 'mIsSome' is 0
1
Field 'mIsSome' is 0
1
Field 'mIsSome' is 0
1
Field 'mIsSome' is 0
1
Field 'mIsSome' is 0
1
Field 'mIsSome' is 0
) {
43
←
Taking false branch→
    this->addr()->T::~T();
  }
}
44
←
Calling implicit destructor for 'MaybeStorageBase<mozilla::WidgetMouseEvent, false>'→
45
←
Calling '~Union'→
277};

279template <typename T>
280struct MaybeStorage<T, true> : MaybeStorageBase<T> {
protected:
char mIsSome = false;  // not bool -- guarantees minimal space consumption

constexpr MaybeStorage() = default;
constexpr explicit MaybeStorage(const T& aVal)
    : MaybeStorageBase<T>{aVal}, mIsSome{true} {}
constexpr explicit MaybeStorage(T&& aVal)
    : MaybeStorageBase<T>{std::move(aVal)}, mIsSome{true} {}

template <typename... Args>
constexpr explicit MaybeStorage(std::in_place_t, Args&&... aArgs)
    : MaybeStorageBase<T>{std::in_place, std::forward<Args>(aArgs)...},
      mIsSome{true} {}
294};

296template <typename T>
297struct IsMaybeImpl : std::false_type {};

299template <typename T>
300struct IsMaybeImpl<Maybe<T>> : std::true_type {};

302template <typename T>
303using IsMaybe = IsMaybeImpl<std::decay_t<T>>;

305}  // namespace detail

307template <typename T, typename U = typename std::remove_cv<
                        typename std::remove_reference<T>::type>::type>
309constexpr Maybe<U> Some(T&& aValue);

311/*
* Maybe is a container class which contains either zero or one elements. It
* serves two roles. It can represent values which are *semantically* optional,
* augmenting a type with an explicit 'Nothing' value. In this role, it provides
* methods that make it easy to work with values that may be missing, along with
* equality and comparison operators so that Maybe values can be stored in
* containers. Maybe values can be constructed conveniently in expressions using
* type inference, as follows:
*
*   void doSomething(Maybe<Foo> aFoo) {
*     if (aFoo)                  // Make sure that aFoo contains a value...
*       aFoo->takeAction();      // and then use |aFoo->| to access it.
*   }                            // |*aFoo| also works!
*
*   doSomething(Nothing());      // Passes a Maybe<Foo> containing no value.
*   doSomething(Some(Foo(100))); // Passes a Maybe<Foo> containing |Foo(100)|.
*
* You'll note that it's important to check whether a Maybe contains a value
* before using it, using conversion to bool, |isSome()|, or |isNothing()|. You
* can avoid these checks, and sometimes write more readable code, using
* |valueOr()|, |ptrOr()|, and |refOr()|, which allow you to retrieve the value
* in the Maybe and provide a default for the 'Nothing' case.  You can also use
* |apply()| to call a function only if the Maybe holds a value, and |map()| to
* transform the value in the Maybe, returning another Maybe with a possibly
* different type.
*
* Maybe's other role is to support lazily constructing objects without using
* dynamic storage. A Maybe directly contains storage for a value, but it's
* empty by default. |emplace()|, as mentioned above, can be used to construct a
* value in Maybe's storage.  The value a Maybe contains can be destroyed by
* calling |reset()|; this will happen automatically if a Maybe is destroyed
* while holding a value.
*
* It's a common idiom in C++ to use a pointer as a 'Maybe' type, with a null
* value meaning 'Nothing' and any other value meaning 'Some'. You can convert
* from such a pointer to a Maybe value using 'ToMaybe()'.
*
* Maybe is inspired by similar types in the standard library of many other
* languages (e.g. Haskell's Maybe and Rust's Option). In the C++ world it's
* very similar to std::optional, which was proposed for C++14 and originated in
* Boost. The most important differences between Maybe and std::optional are:
*
*   - std::optional<T> may be compared with T. We deliberately forbid that.
*   - std::optional has |valueOr()|, equivalent to Maybe's |valueOr()|, but
*     lacks corresponding methods for |refOr()| and |ptrOr()|.
*   - std::optional lacks |map()| and |apply()|, making it less suitable for
*     functional-style code.
*   - std::optional lacks many convenience functions that Maybe has. Most
*     unfortunately, it lacks equivalents of the type-inferred constructor
*     functions |Some()| and |Nothing()|.
*/
362template <class T>
363class MOZ_INHERIT_TYPE_ANNOTATIONS_FROM_TEMPLATE_ARGS Maybe
  : private detail::MaybeStorage<T>,
    public detail::Maybe_CopyMove_Enabler<T> {
template <typename, bool, bool, bool>
friend class detail::Maybe_CopyMove_Enabler;

template <typename U, typename V>
friend constexpr Maybe<V> Some(U&& aValue);

struct SomeGuard {};

template <typename U>
constexpr Maybe(U&& aValue, SomeGuard)
    : detail::MaybeStorage<T>{std::forward<U>(aValue)} {}

using detail::MaybeStorage<T>::mIsSome;
using detail::MaybeStorage<T>::mStorage;

void poisonData() { detail::MaybePoisoner<T>::poison(&mStorage.val); }

public:
using ValueType = T;

MOZ_ALLOW_TEMPORARY constexpr Maybe() = default;
23
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Calling defaulted default constructor for 'MaybeStorage<mozilla::WidgetMouseEvent, false>'→
31
←
Returning from default constructor for 'MaybeStorage<mozilla::WidgetMouseEvent, false>'→
32
←
Returning without writing to 'this->mStorage.val.mClickTarget.mRawPtr'→

MOZ_ALLOW_TEMPORARY MOZ_IMPLICIT constexpr Maybe(Nothing) : Maybe{} {}

template <typename... Args>
constexpr explicit Maybe(std::in_place_t, Args&&... aArgs)
    : detail::MaybeStorage<T>{std::in_place, std::forward<Args>(aArgs)...} {}

/**
 * Maybe<T> can be copy-constructed from a Maybe<U> if T is constructible from
 * a const U&.
 */
template <typename U,
          std::enable_if_t<std::is_constructible_v<T, const U&>, bool> = true>
MOZ_IMPLICIT Maybe(const Maybe<U>& aOther) {
  if (aOther.isSome()) {
    emplace(*aOther);
  }
}

template <typename U, std::enable_if_t<!std::is_constructible_v<T, const U&>,
                                       bool> = true>
explicit Maybe(const Maybe<U>& aOther) = delete;

/**
 * Maybe<T> can be move-constructed from a Maybe<U> if T is constructible from
 * a U&&.
 */
template <typename U,
          std::enable_if_t<std::is_constructible_v<T, U&&>, bool> = true>
MOZ_IMPLICIT Maybe(Maybe<U>&& aOther) {
  if (aOther.isSome()) {
    emplace(std::move(*aOther));
    aOther.reset();
  }
}
template <typename U,
          std::enable_if_t<!std::is_constructible_v<T, U&&>, bool> = true>
explicit Maybe(Maybe<U>&& aOther) = delete;

template <typename U,
          std::enable_if_t<std::is_constructible_v<T, const U&>, bool> = true>
Maybe& operator=(const Maybe<U>& aOther) {
  if (aOther.isSome()) {
    if (mIsSome) {
      ref() = aOther.ref();
    } else {
      emplace(*aOther);
    }
  } else {
    reset();
  }
  return *this;
}

template <typename U, std::enable_if_t<!std::is_constructible_v<T, const U&>,
                                       bool> = true>
Maybe& operator=(const Maybe<U>& aOther) = delete;

template <typename U,
          std::enable_if_t<std::is_constructible_v<T, U&&>, bool> = true>
Maybe& operator=(Maybe<U>&& aOther) {
  if (aOther.isSome()) {
    if (mIsSome) {
      ref() = std::move(aOther.ref());
    } else {
      emplace(std::move(*aOther));
    }
    aOther.reset();
  } else {
    reset();
  }

  return *this;
}

template <typename U,
          std::enable_if_t<!std::is_constructible_v<T, U&&>, bool> = true>
Maybe& operator=(Maybe<U>&& aOther) = delete;

constexpr Maybe& operator=(Nothing) {
  reset();
  return *this;
}

/* Methods that check whether this Maybe contains a value */
constexpr explicit operator bool() const { return isSome(); }
constexpr bool isSome() const { return mIsSome; }
constexpr bool isNothing() const { return !mIsSome; }

/* Returns the contents of this Maybe<T> by value. Unsafe unless |isSome()|.
 */
constexpr T value() const&;
constexpr T value() &&;
constexpr T value() const&&;

/**
 * Move the contents of this Maybe<T> out of internal storage and return it
 * without calling the destructor. The internal storage is also reset to
 * avoid multiple calls. Unsafe unless |isSome()|.
 */
constexpr T extract() {
  MOZ_RELEASE_ASSERT(isSome())do { static_assert( mozilla::detail::AssertionConditionType<
decltype(isSome())>::isValid, "invalid assertion condition"
); if ((__builtin_expect(!!(!(!!(isSome()))), 0))) { do { } while
 (false); MOZ_ReportAssertionFailure("isSome()", "/var/lib/jenkins/workspace/firefox-scan-build/obj-x86_64-pc-linux-gnu/dist/include/mozilla/Maybe.h"
, 488); AnnotateMozCrashReason("MOZ_RELEASE_ASSERT" "(" "isSome()"
 ")"); do { *((volatile int*)__null) = 488; __attribute__((nomerge
)) ::abort(); } while (false); } } while (false);
  T v = std::move(mStorage.val);
  reset();
  return v;
}

/**
 * Returns the value (possibly |Nothing()|) by moving it out of this Maybe<T>
 * and leaving |Nothing()| in its place.
 */
Maybe<T> take() { return std::exchange(*this, Nothing()); }

/*
 * Returns the contents of this Maybe<T> by value. If |isNothing()|, returns
 * the default value provided.
 *
 * Note: If the value passed to aDefault is not the result of a trivial
 * expression, but expensive to evaluate, e.g. |valueOr(ExpensiveFunction())|,
 * use |valueOrFrom| instead, e.g.
 * |valueOrFrom([arg] { return ExpensiveFunction(arg); })|. This ensures
 * that the expensive expression is only evaluated when its result will
 * actually be used.
 */
template <typename V>
constexpr T valueOr(V&& aDefault) const {
  if (isSome()) {
    return ref();
  }
  return std::forward<V>(aDefault);
}

/*
 * Returns the contents of this Maybe<T> by value. If |isNothing()|, returns
 * the value returned from the function or functor provided.
 */
template <typename F>
constexpr T valueOrFrom(F&& aFunc) const {
  if (isSome()) {
    return ref();
  }
  return aFunc();
}

/* Returns the contents of this Maybe<T> by pointer. Unsafe unless |isSome()|.
 */
T* ptr();
constexpr const T* ptr() const;

/*
 * Returns the contents of this Maybe<T> by pointer. If |isNothing()|,
 * returns the default value provided.
 */
T* ptrOr(T* aDefault) {
  if (isSome()) {
    return ptr();
  }
  return aDefault;
}

constexpr const T* ptrOr(const T* aDefault) const {
  if (isSome()) {
    return ptr();
  }
  return aDefault;
}

/*
 * Returns the contents of this Maybe<T> by pointer. If |isNothing()|,
 * returns the value returned from the function or functor provided.
 */
template <typename F>
T* ptrOrFrom(F&& aFunc) {
  if (isSome()) {
    return ptr();
  }
  return aFunc();
}

template <typename F>
const T* ptrOrFrom(F&& aFunc) const {
  if (isSome()) {
    return ptr();
  }
  return aFunc();
}

constexpr T* operator->();
constexpr const T* operator->() const;

/* Returns the contents of this Maybe<T> by ref. Unsafe unless |isSome()|. */
constexpr T& ref() &;
constexpr const T& ref() const&;
constexpr T&& ref() &&;
constexpr const T&& ref() const&&;

/*
 * Returns the contents of this Maybe<T> by ref. If |isNothing()|, returns
 * the default value provided.
 */
constexpr T& refOr(T& aDefault) {
  if (isSome()) {
    return ref();
  }
  return aDefault;
}

constexpr const T& refOr(const T& aDefault) const {
  if (isSome()) {
    return ref();
  }
  return aDefault;
}

/*
 * Returns the contents of this Maybe<T> by ref. If |isNothing()|, returns the
 * value returned from the function or functor provided.
 */
template <typename F>
constexpr T& refOrFrom(F&& aFunc) {
  if (isSome()) {
    return ref();
  }
  return aFunc();
}

template <typename F>
constexpr const T& refOrFrom(F&& aFunc) const {
  if (isSome()) {
    return ref();
  }
  return aFunc();
}

constexpr T& operator*() &;
constexpr const T& operator*() const&;
constexpr T&& operator*() &&;
constexpr const T&& operator*() const&&;

/* If |isSome()|, runs the provided function or functor on the contents of
 * this Maybe. */
template <typename Func>
constexpr Maybe& apply(Func&& aFunc) & {
  if (isSome()) {
    std::forward<Func>(aFunc)(ref());
  }
  return *this;
}

template <typename Func>
constexpr const Maybe& apply(Func&& aFunc) const& {
  if (isSome()) {
    std::forward<Func>(aFunc)(ref());
  }
  return *this;
}

template <typename Func>
constexpr Maybe& apply(Func&& aFunc) && {
  if (isSome()) {
    std::forward<Func>(aFunc)(extract());
  }
  return *this;
}

template <typename Func>
constexpr Maybe& apply(Func&& aFunc) const&& {
  if (isSome()) {
    std::forward<Func>(aFunc)(extract());
  }
  return *this;
}

/*
 * If |isSome()|, runs the provided function and returns the result wrapped
 * in a Maybe. If |isNothing()|, returns an empty Maybe value with the same
 * value type as what the provided function would have returned.
 */
template <typename Func>
constexpr auto map(Func&& aFunc) & {
  if (isSome()) {
    return Some(std::forward<Func>(aFunc)(ref()));
  }
  return Maybe<decltype(std::forward<Func>(aFunc)(ref()))>{};
}

template <typename Func>
constexpr auto map(Func&& aFunc) const& {
  if (isSome()) {
    return Some(std::forward<Func>(aFunc)(ref()));
  }
  return Maybe<decltype(std::forward<Func>(aFunc)(ref()))>{};
}

template <typename Func>
constexpr auto map(Func&& aFunc) && {
  if (isSome()) {
    return Some(std::forward<Func>(aFunc)(extract()));
  }
  return Maybe<decltype(std::forward<Func>(aFunc)(extract()))>{};
}

template <typename Func>
constexpr auto map(Func&& aFunc) const&& {
  if (isSome()) {
    return Some(std::forward<Func>(aFunc)(extract()));
  }
  return Maybe<decltype(std::forward<Func>(aFunc)(extract()))>{};
}

/*
 * If |isSome()|, runs the provided function or functor on the contents of
 * this Maybe and returns the result. Note that the provided function or
 * functor must return a Maybe<U> of any type U.
 * If |isNothing()|, returns an empty Maybe value with the same type as what
 * the provided function would have returned.
 */
template <typename Func>
constexpr auto andThen(Func&& aFunc) & {
  static_assert(std::is_invocable_v<Func, T&>);
  using U = std::invoke_result_t<Func, T&>;
  static_assert(detail::IsMaybe<U>::value);
  if (isSome()) {
    return std::invoke(std::forward<Func>(aFunc), ref());
  }
  return std::remove_cv_t<std::remove_reference_t<U>>{};
}

template <typename Func>
constexpr auto andThen(Func&& aFunc) const& {
  static_assert(std::is_invocable_v<Func, const T&>);
  using U = std::invoke_result_t<Func, const T&>;
  static_assert(detail::IsMaybe<U>::value);
  if (isSome()) {
    return std::invoke(std::forward<Func>(aFunc), ref());
  }
  return std::remove_cv_t<std::remove_reference_t<U>>{};
}

template <typename Func>
constexpr auto andThen(Func&& aFunc) && {
  static_assert(std::is_invocable_v<Func, T&&>);
  using U = std::invoke_result_t<Func, T&&>;
  static_assert(detail::IsMaybe<U>::value);
  if (isSome()) {
    return std::invoke(std::forward<Func>(aFunc), extract());
  }
  return std::remove_cv_t<std::remove_reference_t<U>>{};
}

template <typename Func>
constexpr auto andThen(Func&& aFunc) const&& {
  static_assert(std::is_invocable_v<Func, const T&&>);
  using U = std::invoke_result_t<Func, const T&&>;
  static_assert(detail::IsMaybe<U>::value);
  if (isSome()) {
    return std::invoke(std::forward<Func>(aFunc), extract());
  }
  return std::remove_cv_t<std::remove_reference_t<U>>{};
}

/*
 * If |isNothing()|, runs the provided function or functor and returns its
 * result. If |isSome()|, returns the contained value wrapped in a Maybe.
 */
template <typename Func>
constexpr Maybe orElse(Func&& aFunc) & {
  static_assert(std::is_invocable_v<Func>);
  using U = std::invoke_result_t<Func>;
  static_assert(
      std::is_same_v<Maybe, std::remove_cv_t<std::remove_reference_t<U>>>);
  if (isSome()) {
    return *this;
  }
  return std::invoke(std::forward<Func>(aFunc));
}

template <typename Func>
constexpr Maybe orElse(Func&& aFunc) const& {
  static_assert(std::is_invocable_v<Func>);
  using U = std::invoke_result_t<Func>;
  static_assert(
      std::is_same_v<Maybe, std::remove_cv_t<std::remove_reference_t<U>>>);
  if (isSome()) {
    return *this;
  }
  return std::invoke(std::forward<Func>(aFunc));
}

template <typename Func>
constexpr Maybe orElse(Func&& aFunc) && {
  static_assert(std::is_invocable_v<Func>);
  using U = std::invoke_result_t<Func>;
  static_assert(
      std::is_same_v<Maybe, std::remove_cv_t<std::remove_reference_t<U>>>);
  if (isSome()) {
    return std::move(*this);
  }
  return std::invoke(std::forward<Func>(aFunc));
}

template <typename Func>
constexpr Maybe orElse(Func&& aFunc) const&& {
  static_assert(std::is_invocable_v<Func>);
  using U = std::invoke_result_t<Func>;
  static_assert(
      std::is_same_v<Maybe, std::remove_cv_t<std::remove_reference_t<U>>>);
  if (isSome()) {
    return std::move(*this);
  }
  return std::invoke(std::forward<Func>(aFunc));
}

/* If |isSome()|, empties this Maybe and destroys its contents. */
constexpr void reset() {
  if (isSome()) {
    if constexpr (!std::is_trivially_destructible_v<T>) {
      /*
       * Static analyzer gets confused if we have Maybe<MutexAutoLock>,
       * so we suppress thread-safety warnings here
       */
      MOZ_PUSH_IGNORE_THREAD_SAFETYGCC diagnostic push
 GCC diagnostic ignored "-Wthread-safety"

      ref().T::~T();
      MOZ_POP_THREAD_SAFETYGCC diagnostic pop
      poisonData();
    }
    mIsSome = false;
  }
}

/*
 * Constructs a T value in-place in this empty Maybe<T>'s storage. The
 * arguments to |emplace()| are the parameters to T's constructor.
 */
template <typename... Args>
constexpr void emplace(Args&&... aArgs);

template <typename U>
constexpr std::enable_if_t<std::is_same_v<T, U> &&
                           std::is_copy_constructible_v<U> &&
                           !std::is_move_constructible_v<U>>
emplace(U&& aArgs) {
  emplace(aArgs);
}

friend std::ostream& operator<<(std::ostream& aStream,
                                const Maybe<T>& aMaybe) {
  if (aMaybe) {
    aStream << aMaybe.ref();
  } else {
    aStream << "<Nothing>";
  }
  return aStream;
}
841};

843template <typename T>
844class Maybe<T&> {
public:
constexpr Maybe() = default;
constexpr MOZ_IMPLICIT Maybe(Nothing) {}

void emplace(T& aRef) { mValue = &aRef; }

/* Methods that check whether this Maybe contains a value */
constexpr explicit operator bool() const { return isSome(); }
constexpr bool isSome() const { return mValue; }
constexpr bool isNothing() const { return !mValue; }

T& ref() const {
  MOZ_RELEASE_ASSERT(isSome())do { static_assert( mozilla::detail::AssertionConditionType<
decltype(isSome())>::isValid, "invalid assertion condition"
); if ((__builtin_expect(!!(!(!!(isSome()))), 0))) { do { } while
 (false); MOZ_ReportAssertionFailure("isSome()", "/var/lib/jenkins/workspace/firefox-scan-build/obj-x86_64-pc-linux-gnu/dist/include/mozilla/Maybe.h"
, 857); AnnotateMozCrashReason("MOZ_RELEASE_ASSERT" "(" "isSome()"
 ")"); do { *((volatile int*)__null) = 857; __attribute__((nomerge
)) ::abort(); } while (false); } } while (false);
  return *mValue;
}

T* operator->() const { return &ref(); }
T& operator*() const { return ref(); }

// Deliberately not defining value and ptr accessors, as these may be
// confusing on a reference-typed Maybe.

// XXX Should we define refOr?

void reset() { mValue = nullptr; }

template <typename Func>
const Maybe& apply(Func&& aFunc) const {
  if (isSome()) {
    std::forward<Func>(aFunc)(ref());
  }
  return *this;
}

template <typename Func>
auto map(Func&& aFunc) const {
  Maybe<decltype(std::forward<Func>(aFunc)(ref()))> val;
  if (isSome()) {
    val.emplace(std::forward<Func>(aFunc)(ref()));
  }
  return val;
}

template <typename Func>
constexpr auto andThen(Func&& aFunc) const {
  static_assert(std::is_invocable_v<Func, T&>);
  using U = std::invoke_result_t<Func, T&>;
  static_assert(detail::IsMaybe<U>::value);
  if (isSome()) {
    return std::invoke(std::forward<Func>(aFunc), ref());
  }
  return std::remove_cv_t<std::remove_reference_t<U>>{};
}

template <typename Func>
constexpr Maybe orElse(Func&& aFunc) const {
  static_assert(std::is_invocable_v<Func>);
  using U = std::invoke_result_t<Func>;
  static_assert(
      std::is_same_v<Maybe, std::remove_cv_t<std::remove_reference_t<U>>>);
  if (isSome()) {
    return *this;
  }
  return std::invoke(std::forward<Func>(aFunc));
}

bool refEquals(const Maybe<T&>& aOther) const {
  return mValue == aOther.mValue;
}

bool refEquals(const T& aOther) const { return mValue == &aOther; }

private:
T* mValue = nullptr;
919};

921template <typename T>
922constexpr T Maybe<T>::value() const& {
MOZ_RELEASE_ASSERT(isSome())do { static_assert( mozilla::detail::AssertionConditionType<
decltype(isSome())>::isValid, "invalid assertion condition"
); if ((__builtin_expect(!!(!(!!(isSome()))), 0))) { do { } while
 (false); MOZ_ReportAssertionFailure("isSome()", "/var/lib/jenkins/workspace/firefox-scan-build/obj-x86_64-pc-linux-gnu/dist/include/mozilla/Maybe.h"
, 923); AnnotateMozCrashReason("MOZ_RELEASE_ASSERT" "(" "isSome()"
 ")"); do { *((volatile int*)__null) = 923; __attribute__((nomerge
)) ::abort(); } while (false); } } while (false);
return ref();
925}

927template <typename T>
928constexpr T Maybe<T>::value() && {
MOZ_RELEASE_ASSERT(isSome())do { static_assert( mozilla::detail::AssertionConditionType<
decltype(isSome())>::isValid, "invalid assertion condition"
); if ((__builtin_expect(!!(!(!!(isSome()))), 0))) { do { } while
 (false); MOZ_ReportAssertionFailure("isSome()", "/var/lib/jenkins/workspace/firefox-scan-build/obj-x86_64-pc-linux-gnu/dist/include/mozilla/Maybe.h"
, 929); AnnotateMozCrashReason("MOZ_RELEASE_ASSERT" "(" "isSome()"
 ")"); do { *((volatile int*)__null) = 929; __attribute__((nomerge
)) ::abort(); } while (false); } } while (false);
return std::move(ref());
931}

933template <typename T>
934constexpr T Maybe<T>::value() const&& {
MOZ_RELEASE_ASSERT(isSome())do { static_assert( mozilla::detail::AssertionConditionType<
decltype(isSome())>::isValid, "invalid assertion condition"
); if ((__builtin_expect(!!(!(!!(isSome()))), 0))) { do { } while
 (false); MOZ_ReportAssertionFailure("isSome()", "/var/lib/jenkins/workspace/firefox-scan-build/obj-x86_64-pc-linux-gnu/dist/include/mozilla/Maybe.h"
, 935); AnnotateMozCrashReason("MOZ_RELEASE_ASSERT" "(" "isSome()"
 ")"); do { *((volatile int*)__null) = 935; __attribute__((nomerge
)) ::abort(); } while (false); } } while (false);
return std::move(ref());
937}

939template <typename T>
940T* Maybe<T>::ptr() {
MOZ_RELEASE_ASSERT(isSome())do { static_assert( mozilla::detail::AssertionConditionType<
decltype(isSome())>::isValid, "invalid assertion condition"
); if ((__builtin_expect(!!(!(!!(isSome()))), 0))) { do { } while
 (false); MOZ_ReportAssertionFailure("isSome()", "/var/lib/jenkins/workspace/firefox-scan-build/obj-x86_64-pc-linux-gnu/dist/include/mozilla/Maybe.h"
, 941); AnnotateMozCrashReason("MOZ_RELEASE_ASSERT" "(" "isSome()"
 ")"); do { *((volatile int*)__null) = 941; __attribute__((nomerge
)) ::abort(); } while (false); } } while (false);
return &ref();
943}

945template <typename T>
946constexpr const T* Maybe<T>::ptr() const {
MOZ_RELEASE_ASSERT(isSome())do { static_assert( mozilla::detail::AssertionConditionType<
decltype(isSome())>::isValid, "invalid assertion condition"
); if ((__builtin_expect(!!(!(!!(isSome()))), 0))) { do { } while
 (false); MOZ_ReportAssertionFailure("isSome()", "/var/lib/jenkins/workspace/firefox-scan-build/obj-x86_64-pc-linux-gnu/dist/include/mozilla/Maybe.h"
, 947); AnnotateMozCrashReason("MOZ_RELEASE_ASSERT" "(" "isSome()"
 ")"); do { *((volatile int*)__null) = 947; __attribute__((nomerge
)) ::abort(); } while (false); } } while (false);
return &ref();
949}

951template <typename T>
952constexpr T* Maybe<T>::operator->() {
MOZ_RELEASE_ASSERT(isSome())do { static_assert( mozilla::detail::AssertionConditionType<
decltype(isSome())>::isValid, "invalid assertion condition"
); if ((__builtin_expect(!!(!(!!(isSome()))), 0))) { do { } while
 (false); MOZ_ReportAssertionFailure("isSome()", "/var/lib/jenkins/workspace/firefox-scan-build/obj-x86_64-pc-linux-gnu/dist/include/mozilla/Maybe.h"
, 953); AnnotateMozCrashReason("MOZ_RELEASE_ASSERT" "(" "isSome()"
 ")"); do { *((volatile int*)__null) = 953; __attribute__((nomerge
)) ::abort(); } while (false); } } while (false);
return ptr();
955}

957template <typename T>
958constexpr const T* Maybe<T>::operator->() const {
MOZ_RELEASE_ASSERT(isSome())do { static_assert( mozilla::detail::AssertionConditionType<
decltype(isSome())>::isValid, "invalid assertion condition"
); if ((__builtin_expect(!!(!(!!(isSome()))), 0))) { do { } while
 (false); MOZ_ReportAssertionFailure("isSome()", "/var/lib/jenkins/workspace/firefox-scan-build/obj-x86_64-pc-linux-gnu/dist/include/mozilla/Maybe.h"
, 959); AnnotateMozCrashReason("MOZ_RELEASE_ASSERT" "(" "isSome()"
 ")"); do { *((volatile int*)__null) = 959; __attribute__((nomerge
)) ::abort(); } while (false); } } while (false);
return ptr();
961}

963template <typename T>
964constexpr T& Maybe<T>::ref() & {
MOZ_RELEASE_ASSERT(isSome())do { static_assert( mozilla::detail::AssertionConditionType<
decltype(isSome())>::isValid, "invalid assertion condition"
); if ((__builtin_expect(!!(!(!!(isSome()))), 0))) { do { } while
 (false); MOZ_ReportAssertionFailure("isSome()", "/var/lib/jenkins/workspace/firefox-scan-build/obj-x86_64-pc-linux-gnu/dist/include/mozilla/Maybe.h"
, 965); AnnotateMozCrashReason("MOZ_RELEASE_ASSERT" "(" "isSome()"
 ")"); do { *((volatile int*)__null) = 965; __attribute__((nomerge
)) ::abort(); } while (false); } } while (false);
return mStorage.val;
967}

969template <typename T>
970constexpr const T& Maybe<T>::ref() const& {
MOZ_RELEASE_ASSERT(isSome())do { static_assert( mozilla::detail::AssertionConditionType<
decltype(isSome())>::isValid, "invalid assertion condition"
); if ((__builtin_expect(!!(!(!!(isSome()))), 0))) { do { } while
 (false); MOZ_ReportAssertionFailure("isSome()", "/var/lib/jenkins/workspace/firefox-scan-build/obj-x86_64-pc-linux-gnu/dist/include/mozilla/Maybe.h"
, 971); AnnotateMozCrashReason("MOZ_RELEASE_ASSERT" "(" "isSome()"
 ")"); do { *((volatile int*)__null) = 971; __attribute__((nomerge
)) ::abort(); } while (false); } } while (false);
return mStorage.val;
973}

975template <typename T>
976constexpr T&& Maybe<T>::ref() && {
MOZ_RELEASE_ASSERT(isSome())do { static_assert( mozilla::detail::AssertionConditionType<
decltype(isSome())>::isValid, "invalid assertion condition"
); if ((__builtin_expect(!!(!(!!(isSome()))), 0))) { do { } while
 (false); MOZ_ReportAssertionFailure("isSome()", "/var/lib/jenkins/workspace/firefox-scan-build/obj-x86_64-pc-linux-gnu/dist/include/mozilla/Maybe.h"
, 977); AnnotateMozCrashReason("MOZ_RELEASE_ASSERT" "(" "isSome()"
 ")"); do { *((volatile int*)__null) = 977; __attribute__((nomerge
)) ::abort(); } while (false); } } while (false);
return std::move(mStorage.val);
979}

981template <typename T>
982constexpr const T&& Maybe<T>::ref() const&& {
MOZ_RELEASE_ASSERT(isSome())do { static_assert( mozilla::detail::AssertionConditionType<
decltype(isSome())>::isValid, "invalid assertion condition"
); if ((__builtin_expect(!!(!(!!(isSome()))), 0))) { do { } while
 (false); MOZ_ReportAssertionFailure("isSome()", "/var/lib/jenkins/workspace/firefox-scan-build/obj-x86_64-pc-linux-gnu/dist/include/mozilla/Maybe.h"
, 983); AnnotateMozCrashReason("MOZ_RELEASE_ASSERT" "(" "isSome()"
 ")"); do { *((volatile int*)__null) = 983; __attribute__((nomerge
)) ::abort(); } while (false); } } while (false);
return std::move(mStorage.val);
985}

987template <typename T>
988constexpr T& Maybe<T>::operator*() & {
MOZ_RELEASE_ASSERT(isSome())do { static_assert( mozilla::detail::AssertionConditionType<
decltype(isSome())>::isValid, "invalid assertion condition"
); if ((__builtin_expect(!!(!(!!(isSome()))), 0))) { do { } while
 (false); MOZ_ReportAssertionFailure("isSome()", "/var/lib/jenkins/workspace/firefox-scan-build/obj-x86_64-pc-linux-gnu/dist/include/mozilla/Maybe.h"
, 989); AnnotateMozCrashReason("MOZ_RELEASE_ASSERT" "(" "isSome()"
 ")"); do { *((volatile int*)__null) = 989; __attribute__((nomerge
)) ::abort(); } while (false); } } while (false);
return ref();
991}

993template <typename T>
994constexpr const T& Maybe<T>::operator*() const& {
MOZ_RELEASE_ASSERT(isSome())do { static_assert( mozilla::detail::AssertionConditionType<
decltype(isSome())>::isValid, "invalid assertion condition"
); if ((__builtin_expect(!!(!(!!(isSome()))), 0))) { do { } while
 (false); MOZ_ReportAssertionFailure("isSome()", "/var/lib/jenkins/workspace/firefox-scan-build/obj-x86_64-pc-linux-gnu/dist/include/mozilla/Maybe.h"
, 995); AnnotateMozCrashReason("MOZ_RELEASE_ASSERT" "(" "isSome()"
 ")"); do { *((volatile int*)__null) = 995; __attribute__((nomerge
)) ::abort(); } while (false); } } while (false);
return ref();
997}

999template <typename T>
1000constexpr T&& Maybe<T>::operator*() && {
MOZ_RELEASE_ASSERT(isSome())do { static_assert( mozilla::detail::AssertionConditionType<
decltype(isSome())>::isValid, "invalid assertion condition"
); if ((__builtin_expect(!!(!(!!(isSome()))), 0))) { do { } while
 (false); MOZ_ReportAssertionFailure("isSome()", "/var/lib/jenkins/workspace/firefox-scan-build/obj-x86_64-pc-linux-gnu/dist/include/mozilla/Maybe.h"
, 1001); AnnotateMozCrashReason("MOZ_RELEASE_ASSERT" "(" "isSome()"
 ")"); do { *((volatile int*)__null) = 1001; __attribute__((nomerge
)) ::abort(); } while (false); } } while (false);
return std::move(ref());
1003}

1005template <typename T>
1006constexpr const T&& Maybe<T>::operator*() const&& {
MOZ_RELEASE_ASSERT(isSome())do { static_assert( mozilla::detail::AssertionConditionType<
decltype(isSome())>::isValid, "invalid assertion condition"
); if ((__builtin_expect(!!(!(!!(isSome()))), 0))) { do { } while
 (false); MOZ_ReportAssertionFailure("isSome()", "/var/lib/jenkins/workspace/firefox-scan-build/obj-x86_64-pc-linux-gnu/dist/include/mozilla/Maybe.h"
, 1007); AnnotateMozCrashReason("MOZ_RELEASE_ASSERT" "(" "isSome()"
 ")"); do { *((volatile int*)__null) = 1007; __attribute__((nomerge
)) ::abort(); } while (false); } } while (false);
return std::move(ref());
1009}

1011template <typename T>
1012template <typename... Args>
1013constexpr void Maybe<T>::emplace(Args&&... aArgs) {
MOZ_RELEASE_ASSERT(!isSome())do { static_assert( mozilla::detail::AssertionConditionType<
decltype(!isSome())>::isValid, "invalid assertion condition"
); if ((__builtin_expect(!!(!(!!(!isSome()))), 0))) { do { } while
 (false); MOZ_ReportAssertionFailure("!isSome()", "/var/lib/jenkins/workspace/firefox-scan-build/obj-x86_64-pc-linux-gnu/dist/include/mozilla/Maybe.h"
, 1014); AnnotateMozCrashReason("MOZ_RELEASE_ASSERT" "(" "!isSome()"
 ")"); do { *((volatile int*)__null) = 1014; __attribute__((nomerge
)) ::abort(); } while (false); } } while (false);
::new (KnownNotNull, &mStorage.val) T(std::forward<Args>(aArgs)...);
mIsSome = true;
1017}

1019/*
* Some() creates a Maybe<T> value containing the provided T value. If T has a
* move constructor, it's used to make this as efficient as possible.
*
* Some() selects the type of Maybe it returns by removing any const, volatile,
* or reference qualifiers from the type of the value you pass to it. This gives
* it more intuitive behavior when used in expressions, but it also means that
* if you need to construct a Maybe value that holds a const, volatile, or
* reference value, you need to use emplace() instead.
*/
1029template <typename T, typename U>
1030constexpr Maybe<U> Some(T&& aValue) {
return {std::forward<T>(aValue), typename Maybe<U>::SomeGuard{}};
1032}

1034template <typename T>
1035constexpr Maybe<T&> SomeRef(T& aValue) {
Maybe<T&> value;
value.emplace(aValue);
return value;
1039}

1041template <typename T>
1042constexpr Maybe<T&> ToMaybeRef(T* const aPtr) {
return aPtr ? SomeRef(*aPtr) : Nothing{};
1044}

1046template <typename T>
1047Maybe<std::remove_cv_t<std::remove_reference_t<T>>> ToMaybe(T* aPtr) {
if (aPtr) {
  return Some(*aPtr);
}
return Nothing();
1052}

1054/*
* Two Maybe<T> values are equal if
* - both are Nothing, or
* - both are Some, and the values they contain are equal.
*/
1059template <typename T>
1060constexpr bool operator==(const Maybe<T>& aLHS, const Maybe<T>& aRHS) {
static_assert(!std::is_reference_v<T>,
              "operator== is not defined for Maybe<T&>, compare values or "
              "addresses explicitly instead");
if (aLHS.isNothing() != aRHS.isNothing()) {
  return false;
}
return aLHS.isNothing() || *aLHS == *aRHS;
1068}

1070template <typename T>
1071constexpr bool operator!=(const Maybe<T>& aLHS, const Maybe<T>& aRHS) {
return !(aLHS == aRHS);
1073}

1075/*
* We support comparison to Nothing to allow reasonable expressions like:
*   if (maybeValue == Nothing()) { ... }
*/
1079template <typename T>
1080constexpr bool operator==(const Maybe<T>& aLHS, const Nothing& aRHS) {
return aLHS.isNothing();
1082}

1084template <typename T>
1085constexpr bool operator!=(const Maybe<T>& aLHS, const Nothing& aRHS) {
return !(aLHS == aRHS);
1087}

1089template <typename T>
1090constexpr bool operator==(const Nothing& aLHS, const Maybe<T>& aRHS) {
return aRHS.isNothing();
1092}

1094template <typename T>
1095constexpr bool operator!=(const Nothing& aLHS, const Maybe<T>& aRHS) {
return !(aLHS == aRHS);
1097}

1099/*
* Maybe<T> values are ordered in the same way T values are ordered, except that
* Nothing comes before anything else.
*/
1103template <typename T>
1104constexpr bool operator<(const Maybe<T>& aLHS, const Maybe<T>& aRHS) {
if (aLHS.isNothing()) {
  return aRHS.isSome();
}
if (aRHS.isNothing()) {
  return false;
}
return *aLHS < *aRHS;
1112}

1114template <typename T>
1115constexpr bool operator>(const Maybe<T>& aLHS, const Maybe<T>& aRHS) {
return !(aLHS < aRHS || aLHS == aRHS);
1117}

1119template <typename T>
1120constexpr bool operator<=(const Maybe<T>& aLHS, const Maybe<T>& aRHS) {
return aLHS < aRHS || aLHS == aRHS;
1122}

1124template <typename T>
1125constexpr bool operator>=(const Maybe<T>& aLHS, const Maybe<T>& aRHS) {
return !(aLHS < aRHS);
1127}

1129template <typename T>
1130inline void ImplCycleCollectionTraverse(
  nsCycleCollectionTraversalCallback& aCallback, mozilla::Maybe<T>& aField,
  const char* aName, uint32_t aFlags = 0) {
if (aField) {
  ImplCycleCollectionTraverse(aCallback, aField.ref(), aName, aFlags);
}
1136}

1138template <typename T>
1139inline void ImplCycleCollectionUnlink(mozilla::Maybe<T>& aField) {
if (aField) {
  ImplCycleCollectionUnlink(aField.ref());
}
1143}

1145}  // namespace mozilla

1147#endif /* mozilla_Maybe_h */

←

/var/lib/jenkins/workspace/firefox-scan-build/obj-x86_64-pc-linux-gnu/dist/include/mozilla/MaybeStorageBase.h

→

1/* -*- Mode: C++; tab-width: 2; indent-tabs-mode: nil; c-basic-offset: 2 -*- */
2/* vim: set ts=8 sts=2 et sw=2 tw=80: */
3/* This Source Code Form is subject to the terms of the Mozilla Public
4 * License, v. 2.0. If a copy of the MPL was not distributed with this
5 * file, You can obtain one at http://mozilla.org/MPL/2.0/. */
6 
7/* Internal storage class used e.g. by Maybe and Result. This file doesn't
8 * contain any public declarations. */
9 
10#ifndef mfbt_MaybeStorageBase_h
11#define mfbt_MaybeStorageBase_h
12 
13#include <type_traits>
14#include <utility>
15 
16namespace mozilla::detail {
17 
18template <typename T>
19constexpr bool IsTriviallyDestructibleAndCopyable =
20    std::is_trivially_destructible_v<T> &&
21    (std::is_trivially_copy_constructible_v<T> ||
22     !std::is_copy_constructible_v<T>);
23 
24template <typename T, bool TriviallyDestructibleAndCopyable =
25                          IsTriviallyDestructibleAndCopyable<T>>
26struct MaybeStorageBase;
27 
28template <typename T>
29struct MaybeStorageBase<T, false> {
30 protected:
31  using NonConstT = std::remove_const_t<T>;
32 
33  union Union {
34    Union() {}
26
←
Returning without writing to 'this->val.mClickTarget.mRawPtr'→
35    explicit Union(const T& aVal) : val{aVal} {}
36    template <typename U,
37              typename = std::enable_if_t<std::is_move_constructible_v<U>>>
38    explicit Union(U&& aVal) : val{std::forward<U>(aVal)} {}
39    template <typename... Args>
40    explicit Union(std::in_place_t, Args&&... aArgs)
41        : val{std::forward<Args>(aArgs)...} {}
42 
43    ~Union() {}
46
←
Calling '~WidgetMouseEvent'→
44 
45    NonConstT val;
46  } mStorage;
47 
48 public:
49  MaybeStorageBase() = default;
25
←
Calling default constructor for 'Union'→
27
←
Returning from default constructor for 'Union'→
28
←
Returning without writing to 'this->mStorage.val.mClickTarget.mRawPtr'→
50  explicit MaybeStorageBase(const T& aVal) : mStorage{aVal} {}
51  explicit MaybeStorageBase(T&& aVal) : mStorage{std::move(aVal)} {}
52  template <typename... Args>
53  explicit MaybeStorageBase(std::in_place_t, Args&&... aArgs)
54      : mStorage{std::in_place, std::forward<Args>(aArgs)...} {}
55 
56  const T* addr() const { return &mStorage.val; }
57  T* addr() { return &mStorage.val; }
58};
59 
60template <typename T>
61struct MaybeStorageBase<T, true> {
62 protected:
63  using NonConstT = std::remove_const_t<T>;
64 
65  union Union {
66    constexpr Union() : dummy() {}
67    constexpr explicit Union(const T& aVal) : val{aVal} {}
68    constexpr explicit Union(T&& aVal) : val{std::move(aVal)} {}
69    template <typename... Args>
70    constexpr explicit Union(std::in_place_t, Args&&... aArgs)
71        : val{std::forward<Args>(aArgs)...} {}
72 
73    NonConstT val;
74    char dummy;
75  } mStorage;
76 
77 public:
78  constexpr MaybeStorageBase() = default;
79  constexpr explicit MaybeStorageBase(const T& aVal) : mStorage{aVal} {}
80  constexpr explicit MaybeStorageBase(T&& aVal) : mStorage{std::move(aVal)} {}
81 
82  template <typename... Args>
83  constexpr explicit MaybeStorageBase(std::in_place_t, Args&&... aArgs)
84      : mStorage{std::in_place, std::forward<Args>(aArgs)...} {}
85 
86  constexpr const T* addr() const { return &mStorage.val; }
87  constexpr T* addr() { return &mStorage.val; }
88};
89 
90}  // namespace mozilla::detail
91 
92#endif

←

/var/lib/jenkins/workspace/firefox-scan-build/obj-x86_64-pc-linux-gnu/dist/include/mozilla/MemoryReportingProcess.h

→

1	/* -- Mode: C++; tab-width: 8; indent-tabs-mode: nil; c-basic-offset: 2 -- */
2	/* vim: set ts=8 sts=2 et sw=2 tw=80: */
3	/* This Source Code Form is subject to the terms of the Mozilla Public
4	* License, v. 2.0. If a copy of the MPL was not distributed with this
5	* file, You can obtain one at http://mozilla.org/MPL/2.0/. */
6
7	#ifndef xpcom_base_MemoryReportingProcess_h
8	#define xpcom_base_MemoryReportingProcess_h
9
10	#include <stdint.h>
11	#include "nscore.h"
12
13	namespace mozilla {
14	namespace ipc {
15	class FileDescriptor;
16	} // namespace ipc
17
18	template <class T>
19	class Maybe;
20
21	// Top-level process actors should implement this to integrate with
22	// nsMemoryReportManager.
23	class MemoryReportingProcess {
24	public:
25	NS_IMETHOD_(MozExternalRefCountType)virtual MozExternalRefCountType AddRef() = 0;
26	NS_IMETHOD_(MozExternalRefCountType)virtual MozExternalRefCountType Release() = 0;
27
28	virtual ~MemoryReportingProcess() = default;
29
30	// Return true if the process is still alive, false otherwise.
31	virtual bool IsAlive() const = 0;
32
33	// Initiate a memory report request, returning true if a report was
34	// successfully initiated and false otherwise.
35	virtual bool SendRequestMemoryReport(
36	const uint32_t& aGeneration, const bool& aAnonymize,
37	const bool& aMinimizeMemoryUsage,
38	const Maybe<mozilla::ipc::FileDescriptor>& aDMDFile) = 0;
39
40	virtual int32_t Pid() const = 0;
41	};
42
43	} // namespace mozilla
44
45	#endif // xpcom_base_MemoryReportingProcess_h

←

/var/lib/jenkins/workspace/firefox-scan-build/obj-x86_64-pc-linux-gnu/dist/include/mozilla/MouseEvents.h

→

1/* -*- Mode: C++; tab-width: 2; indent-tabs-mode: nil; c-basic-offset: 2 -*- */
2/* This Source Code Form is subject to the terms of the Mozilla Public
* License, v. 2.0. If a copy of the MPL was not distributed with this
* file, You can obtain one at http://mozilla.org/MPL/2.0/. */

6#ifndef mozilla_MouseEvents_h__
7#define mozilla_MouseEvents_h__

9#include <stdint.h>
10#include <math.h>

12#include "mozilla/BasicEvents.h"
13#include "mozilla/EventForwards.h"
14#include "mozilla/MathAlgorithms.h"
15#include "mozilla/dom/DataTransfer.h"
16#include "mozilla/ipc/IPCForwards.h"
17#include "nsCOMPtr.h"

19namespace mozilla {

21namespace dom {
22class PBrowserParent;
23class PBrowserChild;
24class PBrowserBridgeParent;
25}  // namespace dom

27class WidgetPointerEvent;
28}  // namespace mozilla

30namespace mozilla {
31class WidgetPointerEventHolder final {
public:
nsTArray<WidgetPointerEvent> mEvents;
NS_INLINE_DECL_REFCOUNTING(WidgetPointerEventHolder)public: MozExternalRefCountType AddRef(void) { static_assert(
!std::is_destructible_v<WidgetPointerEventHolder>, "Reference-counted class "
 "WidgetPointerEventHolder" " should not have a public destructor. "
 "Make this class's destructor non-public"); do { static_assert
( mozilla::detail::AssertionConditionType<decltype(int32_t
(mRefCnt) >= 0)>::isValid, "invalid assertion condition"
); if ((__builtin_expect(!!(!(!!(int32_t(mRefCnt) >= 0))),
 0))) { do { } while (false); MOZ_ReportAssertionFailure("int32_t(mRefCnt) >= 0"
 " (" "illegal refcnt" ")", "/var/lib/jenkins/workspace/firefox-scan-build/obj-x86_64-pc-linux-gnu/dist/include/mozilla/MouseEvents.h"
, 34); AnnotateMozCrashReason("MOZ_ASSERT" "(" "int32_t(mRefCnt) >= 0"
 ") (" "illegal refcnt" ")"); do { *((volatile int*)__null) =
 34; __attribute__((nomerge)) ::abort(); } while (false); } }
 while (false); _mOwningThread.AssertOwnership("WidgetPointerEventHolder"
 " not thread-safe"); ++mRefCnt; NS_LogAddRef((this), (mRefCnt
), ("WidgetPointerEventHolder"), (uint32_t)(sizeof(*this))); return
 mRefCnt; } MozExternalRefCountType Release(void) { do { static_assert
( mozilla::detail::AssertionConditionType<decltype(int32_t
(mRefCnt) > 0)>::isValid, "invalid assertion condition"
); if ((__builtin_expect(!!(!(!!(int32_t(mRefCnt) > 0))), 0
))) { do { } while (false); MOZ_ReportAssertionFailure("int32_t(mRefCnt) > 0"
 " (" "dup release" ")", "/var/lib/jenkins/workspace/firefox-scan-build/obj-x86_64-pc-linux-gnu/dist/include/mozilla/MouseEvents.h"
, 34); AnnotateMozCrashReason("MOZ_ASSERT" "(" "int32_t(mRefCnt) > 0"
 ") (" "dup release" ")"); do { *((volatile int*)__null) = 34
; __attribute__((nomerge)) ::abort(); } while (false); } } while
 (false); _mOwningThread.AssertOwnership("WidgetPointerEventHolder"
 " not thread-safe"); --mRefCnt; NS_LogRelease((this), (mRefCnt
), ("WidgetPointerEventHolder")); if (mRefCnt == 0) { mRefCnt
 = 1; delete (this); return 0; } return mRefCnt; } using HasThreadSafeRefCnt
 = std::false_type; protected: nsAutoRefCnt mRefCnt; nsAutoOwningThread
 _mOwningThread; public:

private:
virtual ~WidgetPointerEventHolder() = default;
38};

40/******************************************************************************
* mozilla::WidgetPointerHelper
******************************************************************************/

44class WidgetPointerHelper {
public:
uint32_t pointerId;
int32_t tiltX;
int32_t tiltY;
int32_t twist;
float tangentialPressure;
bool convertToPointer;
RefPtr<WidgetPointerEventHolder> mCoalescedWidgetEvents;

WidgetPointerHelper()
    : pointerId(0),
      tiltX(0),
      tiltY(0),
      twist(0),
      tangentialPressure(0),
      convertToPointer(true) {}

WidgetPointerHelper(uint32_t aPointerId, uint32_t aTiltX, uint32_t aTiltY,
                    uint32_t aTwist = 0, float aTangentialPressure = 0)
    : pointerId(aPointerId),
      tiltX(aTiltX),
      tiltY(aTiltY),
      twist(aTwist),
      tangentialPressure(aTangentialPressure),
      convertToPointer(true) {}

explicit WidgetPointerHelper(const WidgetPointerHelper& aHelper) = default;

constexpr static double kPi =
74#ifdef M_PI3.14159265358979323846
    M_PI3.14159265358979323846;
76#else
    3.14159265358979323846;
78#endif
constexpr static double kHalfPi =
80#ifdef M_PI_21.57079632679489661923
    M_PI_21.57079632679489661923;
82#else
    1.57079632679489661923;
84#endif
constexpr static double kDoublePi = kPi * 2;

constexpr static double GetDefaultAltitudeAngle() { return kHalfPi; }
constexpr static double GetDefaultAzimuthAngle() { return 0.0; }

double ComputeAltitudeAngle() const {
  return ComputeAltitudeAngle(tiltX, tiltY);
}
double ComputeAzimuthAngle() const {
  return ComputeAzimuthAngle(tiltX, tiltY);
}

static double ComputeAltitudeAngle(int32_t aTiltX, int32_t aTiltY);
static double ComputeAzimuthAngle(int32_t aTiltX, int32_t aTiltY);

static double ComputeTiltX(double aAltitudeAngle, double aAzimuthAngle);
static double ComputeTiltY(double aAltitudeAngle, double aAzimuthAngle);

void AssignPointerHelperData(const WidgetPointerHelper& aEvent,
                             bool aCopyCoalescedEvents = false) {
  pointerId = aEvent.pointerId;
  tiltX = aEvent.tiltX;
  tiltY = aEvent.tiltY;
  twist = aEvent.twist;
  tangentialPressure = aEvent.tangentialPressure;
  convertToPointer = aEvent.convertToPointer;
  if (aCopyCoalescedEvents) {
    mCoalescedWidgetEvents = aEvent.mCoalescedWidgetEvents;
  }
}

private:
static int32_t GetValidTiltValue(int32_t aTilt);
static double GetValidAltitudeAngle(double aAltitudeAngle);
static double GetValidAzimuthAngle(double aAzimuthAngle);
120};

122/******************************************************************************
* mozilla::WidgetMouseEventBase
******************************************************************************/

126class WidgetMouseEventBase : public WidgetInputEvent {
private:
friend class dom::PBrowserParent;
friend class dom::PBrowserChild;
friend class dom::PBrowserBridgeParent;
ALLOW_DEPRECATED_READPARAMpublic: enum { kHasDeprecatedReadParamPrivateConstructor = true
 }; template <typename, bool> friend class IPC::ReadResult
; private:

protected:
WidgetMouseEventBase()
    : mPressure(0),
      mButton(0),
      mButtons(0),
      mInputSource(/* MouseEvent_Binding::MOZ_SOURCE_MOUSE = */ 1) {}
// Including MouseEventBinding.h here leads to an include loop, so
// we have to hardcode MouseEvent_Binding::MOZ_SOURCE_MOUSE.

WidgetMouseEventBase(bool aIsTrusted, EventMessage aMessage,
                     nsIWidget* aWidget, EventClassID aEventClassID,
                     const WidgetEventTime* aTime = nullptr)
    : WidgetInputEvent(aIsTrusted, aMessage, aWidget, aEventClassID, aTime),
      mPressure(0),
      mButton(0),
      mButtons(0),
      mInputSource(/* MouseEvent_Binding::MOZ_SOURCE_MOUSE = */ 1) {}
// Including MouseEventBinding.h here leads to an include loop, so
// we have to hardcode MouseEvent_Binding::MOZ_SOURCE_MOUSE.

public:
virtual WidgetMouseEventBase* AsMouseEventBase() override { return this; }

virtual WidgetEvent* Duplicate() const override {
  MOZ_CRASH("WidgetMouseEventBase must not be most-subclass")do { do { } while (false); MOZ_ReportCrash("" "WidgetMouseEventBase must not be most-subclass"
, "/var/lib/jenkins/workspace/firefox-scan-build/obj-x86_64-pc-linux-gnu/dist/include/mozilla/MouseEvents.h"
, 157); AnnotateMozCrashReason("MOZ_CRASH(" "WidgetMouseEventBase must not be most-subclass"
 ")"); do { *((volatile int*)__null) = 157; __attribute__((nomerge
)) ::abort(); } while (false); } while (false);
}

// Finger or touch pressure of event. It ranges between 0.0 and 1.0.
float mPressure;

// Pressed button ID of mousedown or mouseup event.
// This is set only when pressing a button causes the event.
int16_t mButton;

// Flags of all pressed buttons at the event fired.
// This is set at any mouse event, don't be confused with |mButton|.
int16_t mButtons;

// Possible values a in MouseEvent
uint16_t mInputSource;

bool IsLeftButtonPressed() const {
  return !!(mButtons & MouseButtonsFlag::ePrimaryFlag);
}
bool IsRightButtonPressed() const {
  return !!(mButtons & MouseButtonsFlag::eSecondaryFlag);
}
bool IsMiddleButtonPressed() const {
  return !!(mButtons & MouseButtonsFlag::eMiddleFlag);
}
bool Is4thButtonPressed() const {
  return !!(mButtons & MouseButtonsFlag::e4thFlag);
}
bool Is5thButtonPressed() const {
  return !!(mButtons & MouseButtonsFlag::e5thFlag);
}

void AssignMouseEventBaseData(const WidgetMouseEventBase& aEvent,
                              bool aCopyTargets) {
  AssignInputEventData(aEvent, aCopyTargets);

  mButton = aEvent.mButton;
  mButtons = aEvent.mButtons;
  mPressure = aEvent.mPressure;
  mInputSource = aEvent.mInputSource;
}

/**
 * Returns true if left click event.
 */
bool IsLeftClickEvent() const {
  return mMessage == ePointerClick && mButton == MouseButton::ePrimary;
}

/**
 * Returns true if this event changes a button state to "pressed".
 */
[[nodiscard]] bool IsPressingButton() const {
  MOZ_ASSERT(IsTrusted())do { static_assert( mozilla::detail::AssertionConditionType<
decltype(IsTrusted())>::isValid, "invalid assertion condition"
); if ((__builtin_expect(!!(!(!!(IsTrusted()))), 0))) { do { }
 while (false); MOZ_ReportAssertionFailure("IsTrusted()", "/var/lib/jenkins/workspace/firefox-scan-build/obj-x86_64-pc-linux-gnu/dist/include/mozilla/MouseEvents.h"
, 211); AnnotateMozCrashReason("MOZ_ASSERT" "(" "IsTrusted()"
 ")"); do { *((volatile int*)__null) = 211; __attribute__((nomerge
)) ::abort(); } while (false); } } while (false);
  if (mClass == eMouseEventClass) {
    return mMessage == eMouseDown;
  }
  if (mButton == MouseButton::eNotPressed) {
    return false;
  }
  // If this is an ePointerDown event whose mButton is not "not pressed", this
  // is a button pressing event.
  if (mMessage == ePointerDown) {
    return true;
  }
  // If 2 or more buttons are pressed at same time, they are sent with
  // pointermove rather than pointerdown.  Therefore, let's check whether
  // mButtons contains the proper flag for the pressing button.
  const bool buttonsContainButton = !!(
      mButtons & MouseButtonsFlagToChange(static_cast<MouseButton>(mButton)));
  return mMessage == ePointerMove && buttonsContainButton;
}

/**
 * Returns true if this event changes a button state to "released".
 */
[[nodiscard]] bool IsReleasingButton() const {
  MOZ_ASSERT(IsTrusted())do { static_assert( mozilla::detail::AssertionConditionType<
decltype(IsTrusted())>::isValid, "invalid assertion condition"
); if ((__builtin_expect(!!(!(!!(IsTrusted()))), 0))) { do { }
 while (false); MOZ_ReportAssertionFailure("IsTrusted()", "/var/lib/jenkins/workspace/firefox-scan-build/obj-x86_64-pc-linux-gnu/dist/include/mozilla/MouseEvents.h"
, 235); AnnotateMozCrashReason("MOZ_ASSERT" "(" "IsTrusted()"
 ")"); do { *((volatile int*)__null) = 235; __attribute__((nomerge
)) ::abort(); } while (false); } } while (false);
  if (mClass == eMouseEventClass) {
    return mMessage == eMouseUp;
  }
  if (mButton == MouseButton::eNotPressed) {
    return false;
  }
  // If this is an ePointerUp event whose mButton is not "not pressed", this
  // is a button release event.
  if (mMessage == ePointerUp) {
    return true;
  }
  // If the releasing button is not the last button of pressing buttons, web
  // apps notified by pointermove rather than pointerup.  Therefore, let's
  // check whether mButtons loses the proper flag for the releasing button.
  const bool buttonsLoseTheButton = !(
      mButtons & MouseButtonsFlagToChange(static_cast<MouseButton>(mButton)));
  return mMessage == ePointerMove && buttonsLoseTheButton;
}

/**
 * Returns true if the input source supports hover state like a mouse.
 */
[[nodiscard]] bool InputSourceSupportsHover() const;
259};

261/******************************************************************************
* mozilla::WidgetMouseEvent
******************************************************************************/

265class WidgetMouseEvent : public WidgetMouseEventBase,
                       public WidgetPointerHelper {
private:
friend class dom::PBrowserParent;
friend class dom::PBrowserChild;
friend class dom::PBrowserBridgeParent;
ALLOW_DEPRECATED_READPARAMpublic: enum { kHasDeprecatedReadParamPrivateConstructor = true
 }; template <typename, bool> friend class IPC::ReadResult
; private:

public:
typedef bool ReasonType;
enum Reason : ReasonType { eReal, eSynthesized };

typedef uint8_t ContextMenuTriggerType;
enum ContextMenuTrigger : ContextMenuTriggerType {
  eNormal,
  eContextMenuKey,
  eControlClick
};

typedef uint8_t ExitFromType;
enum ExitFrom : ExitFromType {
  ePlatformChild,
  ePlatformTopLevel,
  ePuppet,
  ePuppetParentToPuppetChild
};

protected:
WidgetMouseEvent() = default;

WidgetMouseEvent(bool aIsTrusted, EventMessage aMessage, nsIWidget* aWidget,
                 EventClassID aEventClassID, Reason aReason,
                 ContextMenuTrigger aContextMenuTrigger,
                 const WidgetEventTime* aTime = nullptr)
    : WidgetMouseEventBase(aIsTrusted, aMessage, aWidget, aEventClassID,
                           aTime),
      mReason(aReason),
      mContextMenuTrigger(aContextMenuTrigger) {}

304#ifdef DEBUG1
void AssertContextMenuEventButtonConsistency() const;
306#endif

public:
virtual WidgetMouseEvent* AsMouseEvent() override { return this; }

WidgetMouseEvent(bool aIsTrusted, EventMessage aMessage, nsIWidget* aWidget,
                 Reason aReason = eReal,
                 ContextMenuTrigger aContextMenuTrigger = eNormal,
                 const WidgetEventTime* aTime = nullptr)
    : WidgetMouseEventBase(aIsTrusted, aMessage, aWidget, eMouseEventClass,
                           aTime),
      mReason(aReason),
      mContextMenuTrigger(aContextMenuTrigger) {
  MOZ_ASSERT_IF(aIsTrusted, !IsPointerEventMessage(mMessage))do { if (aIsTrusted) { do { static_assert( mozilla::detail::AssertionConditionType
<decltype(!IsPointerEventMessage(mMessage))>::isValid, "invalid assertion condition"
); if ((__builtin_expect(!!(!(!!(!IsPointerEventMessage(mMessage
)))), 0))) { do { } while (false); MOZ_ReportAssertionFailure
("!IsPointerEventMessage(mMessage)", "/var/lib/jenkins/workspace/firefox-scan-build/obj-x86_64-pc-linux-gnu/dist/include/mozilla/MouseEvents.h"
, 319); AnnotateMozCrashReason("MOZ_ASSERT" "(" "!IsPointerEventMessage(mMessage)"
 ")"); do { *((volatile int*)__null) = 319; __attribute__((nomerge
)) ::abort(); } while (false); } } while (false); } } while (
false);
  if (aMessage == eContextMenu) {
    mButton = (mContextMenuTrigger == eNormal) ? MouseButton::eSecondary
                                               : MouseButton::ePrimary;
  }
}

326#ifdef DEBUG1
virtual ~WidgetMouseEvent() { AssertContextMenuEventButtonConsistency(); }
47
←
Calling '~nsCOMPtr'→
328#endif

virtual WidgetEvent* Duplicate() const override {
  MOZ_ASSERT(mClass == eMouseEventClass,do { static_assert( mozilla::detail::AssertionConditionType<
decltype(mClass == eMouseEventClass)>::isValid, "invalid assertion condition"
); if ((__builtin_expect(!!(!(!!(mClass == eMouseEventClass))
), 0))) { do { } while (false); MOZ_ReportAssertionFailure("mClass == eMouseEventClass"
 " (" "Duplicate() must be overridden by sub class" ")", "/var/lib/jenkins/workspace/firefox-scan-build/obj-x86_64-pc-linux-gnu/dist/include/mozilla/MouseEvents.h"
, 332); AnnotateMozCrashReason("MOZ_ASSERT" "(" "mClass == eMouseEventClass"
 ") (" "Duplicate() must be overridden by sub class" ")"); do
 { *((volatile int*)__null) = 332; __attribute__((nomerge)) ::
abort(); } while (false); } } while (false)
             "Duplicate() must be overridden by sub class")do { static_assert( mozilla::detail::AssertionConditionType<
decltype(mClass == eMouseEventClass)>::isValid, "invalid assertion condition"
); if ((__builtin_expect(!!(!(!!(mClass == eMouseEventClass))
), 0))) { do { } while (false); MOZ_ReportAssertionFailure("mClass == eMouseEventClass"
 " (" "Duplicate() must be overridden by sub class" ")", "/var/lib/jenkins/workspace/firefox-scan-build/obj-x86_64-pc-linux-gnu/dist/include/mozilla/MouseEvents.h"
, 332); AnnotateMozCrashReason("MOZ_ASSERT" "(" "mClass == eMouseEventClass"
 ") (" "Duplicate() must be overridden by sub class" ")"); do
 { *((volatile int*)__null) = 332; __attribute__((nomerge)) ::
abort(); } while (false); } } while (false);
  // Not copying widget, it is a weak reference.
  WidgetMouseEvent* result = new WidgetMouseEvent(
      false, mMessage, nullptr, mReason, mContextMenuTrigger, this);
  result->AssignMouseEventData(*this, true);
  result->mFlags = mFlags;
  return result;
}

// If during mouseup handling we detect that click event might need to be
// dispatched, this is setup to be the target of the click event.
nsCOMPtr<dom::EventTarget> mClickTarget;

// mReason indicates the reason why the event is fired:
// - Representing mouse operation.
// - Synthesized for emulating mousemove event when the content under the
//   mouse cursor is scrolled.
Reason mReason = eReal;

// mContextMenuTrigger is valid only when mMessage is eContextMenu.
// This indicates if the context menu event is caused by context menu key or
// other reasons (typically, a click of right mouse button).
ContextMenuTrigger mContextMenuTrigger = eNormal;

// mExitFrom contains a value only when mMessage is eMouseExitFromWidget.
// This indicates if the mouse cursor exits from a top level platform widget,
// a child widget or a puppet widget.
Maybe<ExitFrom> mExitFrom;

// mClickCount may be non-zero value when mMessage is eMouseDown, eMouseUp,
// ePointerClick or eMouseDoubleClick. The number is count of mouse clicks.
// Otherwise, this must be 0.
uint32_t mClickCount = 0;

// Whether the event should ignore scroll frame bounds during dispatch.
bool mIgnoreRootScrollFrame = false;

// Whether the event should be dispatched on a target limited in capturing
// content.
bool mIgnoreCapturingContent = false;

// Whether the event shouldn't cause click event.
bool mClickEventPrevented = false;

// If this is set to true while the event is being dispatched,
// PresShell::EventHandler::FinalizeHandlingEvent will dispatch a synthesized
// eMouseMove or ePointerMove.
bool mSynthesizeMoveAfterDispatch = false;

void AssignMouseEventData(const WidgetMouseEvent& aEvent, bool aCopyTargets) {
  AssignMouseEventBaseData(aEvent, aCopyTargets);
  AssignPointerHelperData(aEvent, /* aCopyCoalescedEvents */ true);

  mReason = aEvent.mReason;
  mContextMenuTrigger = aEvent.mContextMenuTrigger;
  mExitFrom = aEvent.mExitFrom;
  mClickCount = aEvent.mClickCount;
  mIgnoreRootScrollFrame = aEvent.mIgnoreRootScrollFrame;
  mIgnoreCapturingContent = aEvent.mIgnoreCapturingContent;
  mClickEventPrevented = aEvent.mClickEventPrevented;
}

/**
 * Returns true if the event is a context menu event caused by key.
 */
bool IsContextMenuKeyEvent() const {
  return mMessage == eContextMenu && mContextMenuTrigger == eContextMenuKey;
}

/**
 * Returns true if the event is a real mouse event.  Otherwise, i.e., it's
 * a synthesized event by scroll or something, returns false.
 */
bool IsReal() const { return mReason == eReal; }

/**
 * Returns true if middle click paste is enabled.
 */
static bool IsMiddleClickPasteEnabled();
411};

413/******************************************************************************
* mozilla::WidgetDragEvent
******************************************************************************/

417class WidgetDragEvent : public WidgetMouseEvent {
private:
friend class mozilla::dom::PBrowserParent;
friend class mozilla::dom::PBrowserChild;
ALLOW_DEPRECATED_READPARAMpublic: enum { kHasDeprecatedReadParamPrivateConstructor = true
 }; template <typename, bool> friend class IPC::ReadResult
; private:

protected:
WidgetDragEvent()
    : mUserCancelled(false),
      mDefaultPreventedOnContent(false),
      mInHTMLEditorEventListener(false) {}

public:
virtual WidgetDragEvent* AsDragEvent() override { return this; }

WidgetDragEvent(bool aIsTrusted, EventMessage aMessage, nsIWidget* aWidget,
                const WidgetEventTime* aTime = nullptr)
    : WidgetMouseEvent(aIsTrusted, aMessage, aWidget, eDragEventClass, eReal,
                       eNormal, aTime),
      mUserCancelled(false),
      mDefaultPreventedOnContent(false),
      mInHTMLEditorEventListener(false) {}

virtual WidgetEvent* Duplicate() const override {
  MOZ_ASSERT(mClass == eDragEventClass,do { static_assert( mozilla::detail::AssertionConditionType<
decltype(mClass == eDragEventClass)>::isValid, "invalid assertion condition"
); if ((__builtin_expect(!!(!(!!(mClass == eDragEventClass)))
, 0))) { do { } while (false); MOZ_ReportAssertionFailure("mClass == eDragEventClass"
 " (" "Duplicate() must be overridden by sub class" ")", "/var/lib/jenkins/workspace/firefox-scan-build/obj-x86_64-pc-linux-gnu/dist/include/mozilla/MouseEvents.h"
, 442); AnnotateMozCrashReason("MOZ_ASSERT" "(" "mClass == eDragEventClass"
 ") (" "Duplicate() must be overridden by sub class" ")"); do
 { *((volatile int*)__null) = 442; __attribute__((nomerge)) ::
abort(); } while (false); } } while (false)
             "Duplicate() must be overridden by sub class")do { static_assert( mozilla::detail::AssertionConditionType<
decltype(mClass == eDragEventClass)>::isValid, "invalid assertion condition"
); if ((__builtin_expect(!!(!(!!(mClass == eDragEventClass)))
, 0))) { do { } while (false); MOZ_ReportAssertionFailure("mClass == eDragEventClass"
 " (" "Duplicate() must be overridden by sub class" ")", "/var/lib/jenkins/workspace/firefox-scan-build/obj-x86_64-pc-linux-gnu/dist/include/mozilla/MouseEvents.h"
, 442); AnnotateMozCrashReason("MOZ_ASSERT" "(" "mClass == eDragEventClass"
 ") (" "Duplicate() must be overridden by sub class" ")"); do
 { *((volatile int*)__null) = 442; __attribute__((nomerge)) ::
abort(); } while (false); } } while (false);
  // Not copying widget, it is a weak reference.
  WidgetDragEvent* result =
      new WidgetDragEvent(false, mMessage, nullptr, this);
  result->AssignDragEventData(*this, true);
  result->mFlags = mFlags;
  return result;
}

// The dragging data.
nsCOMPtr<dom::DataTransfer> mDataTransfer;

// If this is true, user has cancelled the drag operation.
bool mUserCancelled;
// If this is true, the drag event's preventDefault() is called on content.
bool mDefaultPreventedOnContent;
// If this event is currently being handled by HTMLEditorEventListener.
bool mInHTMLEditorEventListener;

// XXX Not tested by test_assign_event_data.html
void AssignDragEventData(const WidgetDragEvent& aEvent, bool aCopyTargets) {
  AssignMouseEventData(aEvent, aCopyTargets);

  mDataTransfer = aEvent.mDataTransfer;
  // XXX mUserCancelled isn't copied, is this intentionally?
  mUserCancelled = false;
  mDefaultPreventedOnContent = aEvent.mDefaultPreventedOnContent;
  // XXX mInHTMLEditorEventListener isn't copied, is this intentionally?
  mInHTMLEditorEventListener = false;
}

bool CanConvertToInputData() const {
  return mMessage == eDragStart || mMessage == eDragEnd;
}

/**
 * Should be called before dispatching the DOM tree if this event is
 * synthesized for tests because drop effect is initialized before
 * dispatching from widget if it's not synthesized event, but synthesized
 * events are not initialized in the path.
 */
void InitDropEffectForTests();
484};

486/******************************************************************************
* mozilla::WidgetMouseScrollEvent
*
* This is used for legacy DOM mouse scroll events, i.e.,
* DOMMouseScroll and MozMousePixelScroll event.  These events are NOT hanbled
* by ESM even if widget dispatches them.  Use new WidgetWheelEvent instead.
******************************************************************************/

494class WidgetMouseScrollEvent : public WidgetMouseEventBase {
private:
WidgetMouseScrollEvent() : mDelta(0), mIsHorizontal(false) {}

public:
virtual WidgetMouseScrollEvent* AsMouseScrollEvent() override { return this; }

WidgetMouseScrollEvent(bool aIsTrusted, EventMessage aMessage,
                       nsIWidget* aWidget,
                       const WidgetEventTime* aTime = nullptr)
    : WidgetMouseEventBase(aIsTrusted, aMessage, aWidget,
                           eMouseScrollEventClass, aTime),
      mDelta(0),
      mIsHorizontal(false) {}

virtual WidgetEvent* Duplicate() const override {
  MOZ_ASSERT(mClass == eMouseScrollEventClass,do { static_assert( mozilla::detail::AssertionConditionType<
decltype(mClass == eMouseScrollEventClass)>::isValid, "invalid assertion condition"
); if ((__builtin_expect(!!(!(!!(mClass == eMouseScrollEventClass
))), 0))) { do { } while (false); MOZ_ReportAssertionFailure(
"mClass == eMouseScrollEventClass" " (" "Duplicate() must be overridden by sub class"
 ")", "/var/lib/jenkins/workspace/firefox-scan-build/obj-x86_64-pc-linux-gnu/dist/include/mozilla/MouseEvents.h"
, 511); AnnotateMozCrashReason("MOZ_ASSERT" "(" "mClass == eMouseScrollEventClass"
 ") (" "Duplicate() must be overridden by sub class" ")"); do
 { *((volatile int*)__null) = 511; __attribute__((nomerge)) ::
abort(); } while (false); } } while (false)
             "Duplicate() must be overridden by sub class")do { static_assert( mozilla::detail::AssertionConditionType<
decltype(mClass == eMouseScrollEventClass)>::isValid, "invalid assertion condition"
); if ((__builtin_expect(!!(!(!!(mClass == eMouseScrollEventClass
))), 0))) { do { } while (false); MOZ_ReportAssertionFailure(
"mClass == eMouseScrollEventClass" " (" "Duplicate() must be overridden by sub class"
 ")", "/var/lib/jenkins/workspace/firefox-scan-build/obj-x86_64-pc-linux-gnu/dist/include/mozilla/MouseEvents.h"
, 511); AnnotateMozCrashReason("MOZ_ASSERT" "(" "mClass == eMouseScrollEventClass"
 ") (" "Duplicate() must be overridden by sub class" ")"); do
 { *((volatile int*)__null) = 511; __attribute__((nomerge)) ::
abort(); } while (false); } } while (false);
  // Not copying widget, it is a weak reference.
  WidgetMouseScrollEvent* result =
      new WidgetMouseScrollEvent(false, mMessage, nullptr, this);
  result->AssignMouseScrollEventData(*this, true);
  result->mFlags = mFlags;
  return result;
}

// The delta value of mouse scroll event.
// If the event message is eLegacyMouseLineOrPageScroll, the value indicates
// scroll amount in lines.  However, if the value is
// UIEvent::SCROLL_PAGE_UP or UIEvent::SCROLL_PAGE_DOWN, the
// value inducates one page scroll.  If the event message is
// eLegacyMousePixelScroll, the value indicates scroll amount in pixels.
int32_t mDelta;

// If this is true, it may cause to scroll horizontally.
// Otherwise, vertically.
bool mIsHorizontal;

void AssignMouseScrollEventData(const WidgetMouseScrollEvent& aEvent,
                                bool aCopyTargets) {
  AssignMouseEventBaseData(aEvent, aCopyTargets);

  mDelta = aEvent.mDelta;
  mIsHorizontal = aEvent.mIsHorizontal;
}
539};

541/******************************************************************************
* mozilla::WidgetWheelEvent
******************************************************************************/

545class WidgetWheelEvent : public WidgetMouseEventBase {
private:
friend class mozilla::dom::PBrowserParent;
friend class mozilla::dom::PBrowserChild;
ALLOW_DEPRECATED_READPARAMpublic: enum { kHasDeprecatedReadParamPrivateConstructor = true
 }; template <typename, bool> friend class IPC::ReadResult
; private:

WidgetWheelEvent()
    : mDeltaX(0.0),
      mDeltaY(0.0),
      mDeltaZ(0.0),
      mOverflowDeltaX(0.0),
      mOverflowDeltaY(0.0)
      // Including WheelEventBinding.h here leads to an include loop, so
      // we have to hardcode WheelEvent_Binding::DOM_DELTA_PIXEL.
      ,
      mDeltaMode(/* WheelEvent_Binding::DOM_DELTA_PIXEL = */ 0),
      mLineOrPageDeltaX(0),
      mLineOrPageDeltaY(0),
      mScrollType(SCROLL_DEFAULT),
      mCustomizedByUserPrefs(false),
      mMayHaveMomentum(false),
      mIsMomentum(false),
      mIsNoLineOrPageDelta(false),
      mViewPortIsOverscrolled(false),
      mCanTriggerSwipe(false),
      mAllowToOverrideSystemScrollSpeed(false),
      mDeltaValuesHorizontalizedForDefaultHandler(false) {}

public:
virtual WidgetWheelEvent* AsWheelEvent() override { return this; }

WidgetWheelEvent(bool aIsTrusted, EventMessage aMessage, nsIWidget* aWidget,
                 const WidgetEventTime* aTime = nullptr)
    : WidgetMouseEventBase(aIsTrusted, aMessage, aWidget, eWheelEventClass,
                           aTime),
      mDeltaX(0.0),
      mDeltaY(0.0),
      mDeltaZ(0.0),
      mOverflowDeltaX(0.0),
      mOverflowDeltaY(0.0)
      // Including WheelEventBinding.h here leads to an include loop, so
      // we have to hardcode WheelEvent_Binding::DOM_DELTA_PIXEL.
      ,
      mDeltaMode(/* WheelEvent_Binding::DOM_DELTA_PIXEL = */ 0),
      mLineOrPageDeltaX(0),
      mLineOrPageDeltaY(0),
      mScrollType(SCROLL_DEFAULT),
      mCustomizedByUserPrefs(false),
      mMayHaveMomentum(false),
      mIsMomentum(false),
      mIsNoLineOrPageDelta(false),
      mViewPortIsOverscrolled(false),
      mCanTriggerSwipe(false),
      mAllowToOverrideSystemScrollSpeed(true),
      mDeltaValuesHorizontalizedForDefaultHandler(false) {}

virtual WidgetEvent* Duplicate() const override {
  MOZ_ASSERT(mClass == eWheelEventClass,do { static_assert( mozilla::detail::AssertionConditionType<
decltype(mClass == eWheelEventClass)>::isValid, "invalid assertion condition"
); if ((__builtin_expect(!!(!(!!(mClass == eWheelEventClass))
), 0))) { do { } while (false); MOZ_ReportAssertionFailure("mClass == eWheelEventClass"
 " (" "Duplicate() must be overridden by sub class" ")", "/var/lib/jenkins/workspace/firefox-scan-build/obj-x86_64-pc-linux-gnu/dist/include/mozilla/MouseEvents.h"
, 603); AnnotateMozCrashReason("MOZ_ASSERT" "(" "mClass == eWheelEventClass"
 ") (" "Duplicate() must be overridden by sub class" ")"); do
 { *((volatile int*)__null) = 603; __attribute__((nomerge)) ::
abort(); } while (false); } } while (false)
             "Duplicate() must be overridden by sub class")do { static_assert( mozilla::detail::AssertionConditionType<
decltype(mClass == eWheelEventClass)>::isValid, "invalid assertion condition"
); if ((__builtin_expect(!!(!(!!(mClass == eWheelEventClass))
), 0))) { do { } while (false); MOZ_ReportAssertionFailure("mClass == eWheelEventClass"
 " (" "Duplicate() must be overridden by sub class" ")", "/var/lib/jenkins/workspace/firefox-scan-build/obj-x86_64-pc-linux-gnu/dist/include/mozilla/MouseEvents.h"
, 603); AnnotateMozCrashReason("MOZ_ASSERT" "(" "mClass == eWheelEventClass"
 ") (" "Duplicate() must be overridden by sub class" ")"); do
 { *((volatile int*)__null) = 603; __attribute__((nomerge)) ::
abort(); } while (false); } } while (false);
  // Not copying widget, it is a weak reference.
  WidgetWheelEvent* result =
      new WidgetWheelEvent(false, mMessage, nullptr, this);
  result->AssignWheelEventData(*this, true);
  result->mFlags = mFlags;
  return result;
}

// Scroll gestures that start at the edge of the scrollable range can result
// in a swipe gesture. For the first wheel event of such a gesture, call
// TriggersSwipe() after the event has been processed in order to find out
// whether a swipe should be started.
bool TriggersSwipe() const {
  return mCanTriggerSwipe && mViewPortIsOverscrolled &&
         this->mOverflowDeltaX != 0.0;
}

// NOTE: mDeltaX, mDeltaY and mDeltaZ may be customized by
//       mousewheel.*.delta_multiplier_* prefs which are applied by
//       EventStateManager.  So, after widget dispatches this event,
//       these delta values may have different values than before.
double mDeltaX;
double mDeltaY;
double mDeltaZ;

// The mousewheel tick counts.
double mWheelTicksX = 0.0;
double mWheelTicksY = 0.0;

enum class DeltaModeCheckingState : uint8_t {
  // Neither deltaMode nor the delta values have been accessed.
  Unknown,
  // The delta values have been accessed, without checking deltaMode first.
  Unchecked,
  // The deltaMode has been checked.
  Checked,
};

// For compat reasons, we might expose a DOM_DELTA_LINE event as
// DOM_DELTA_PIXEL instead. Whether we do that depends on whether the event
// has been asked for the deltaMode before the deltas. If it has, we assume
// that the page will correctly handle DOM_DELTA_LINE. This variable tracks
// that state. See bug 1392460.
DeltaModeCheckingState mDeltaModeCheckingState =
    DeltaModeCheckingState::Unknown;

// The amount of scrolling per line or page, without accounting for mouse
// wheel transactions etc.
//
// Computed by EventStateManager::DeltaAccumulator::InitLineOrPageDelta.
nsSize mScrollAmount;

// overflowed delta values for scroll, these values are set by
// EventStateManger.  If the default action of the wheel event isn't scroll,
// these values are always zero.  Otherwise, remaining delta values which are
// not used by scroll are set.
// NOTE: mDeltaX, mDeltaY and mDeltaZ may be modified by EventStateManager.
//       However, mOverflowDeltaX and mOverflowDeltaY indicate unused original
//       delta values which are not applied the delta_multiplier prefs.
//       So, if widget wanted to know the actual direction to be scrolled,
//       it would need to check the mDeltaX and mDeltaY.
double mOverflowDeltaX;
double mOverflowDeltaY;

// Should be one of WheelEvent_Binding::DOM_DELTA_*
uint32_t mDeltaMode;

// If widget sets mLineOrPageDelta, EventStateManager will dispatch
// eLegacyMouseLineOrPageScroll event for compatibility.  Note that the delta
// value means pages if the mDeltaMode is DOM_DELTA_PAGE, otherwise, lines.
int32_t mLineOrPageDeltaX;
int32_t mLineOrPageDeltaY;

// When the default action for an wheel event is moving history or zooming,
// need to chose a delta value for doing it.
int32_t GetPreferredIntDelta() {
  if (!mLineOrPageDeltaX && !mLineOrPageDeltaY) {
    return 0;
  }
  if (mLineOrPageDeltaY && !mLineOrPageDeltaX) {
    return mLineOrPageDeltaY;
  }
  if (mLineOrPageDeltaX && !mLineOrPageDeltaY) {
    return mLineOrPageDeltaX;
  }
  if ((mLineOrPageDeltaX < 0 && mLineOrPageDeltaY > 0) ||
      (mLineOrPageDeltaX > 0 && mLineOrPageDeltaY < 0)) {
    return 0;  // We cannot guess the answer in this case.
  }
  return (Abs(mLineOrPageDeltaX) > Abs(mLineOrPageDeltaY))
             ? mLineOrPageDeltaX
             : mLineOrPageDeltaY;
}

// Scroll type
// The default value is SCROLL_DEFAULT, which means EventStateManager will
// select preferred scroll type automatically.
enum ScrollType : uint8_t {
  SCROLL_DEFAULT,
  SCROLL_SYNCHRONOUSLY,
  SCROLL_ASYNCHRONOUSLY,
  SCROLL_SMOOTHLY
};
ScrollType mScrollType;

// If the delta values are computed from prefs, this value is true.
// Otherwise, i.e., they are computed from native events, false.
bool mCustomizedByUserPrefs;

// true if the momentum events directly tied to this event may follow it.
bool mMayHaveMomentum;
// true if the event is caused by momentum.
bool mIsMomentum;

// If device event handlers don't know when they should set mLineOrPageDeltaX
// and mLineOrPageDeltaY, this is true.  Otherwise, false.
// If mIsNoLineOrPageDelta is true, ESM will generate
// eLegacyMouseLineOrPageScroll events when accumulated delta values reach
// a line height.
bool mIsNoLineOrPageDelta;

// Whether or not the parent of the currently overscrolled frame is the
// ViewPort. This is false in situations when an element on the page is being
// overscrolled (such as a text field), but true when the 'page' is being
// overscrolled.
bool mViewPortIsOverscrolled;

// The wheel event can trigger a swipe to start if it's overscrolling the
// viewport.
bool mCanTriggerSwipe;

// If mAllowToOverrideSystemScrollSpeed is true, the scroll speed may be
// overridden.  Otherwise, the scroll speed won't be overridden even if
// it's enabled by the pref.
bool mAllowToOverrideSystemScrollSpeed;

// After the event's default action handler has adjusted its delta's values
// for horizontalizing a vertical wheel scroll, this variable will be set to
// true.
bool mDeltaValuesHorizontalizedForDefaultHandler;

void AssignWheelEventData(const WidgetWheelEvent& aEvent, bool aCopyTargets) {
  AssignMouseEventBaseData(aEvent, aCopyTargets);

  mDeltaX = aEvent.mDeltaX;
  mDeltaY = aEvent.mDeltaY;
  mDeltaZ = aEvent.mDeltaZ;
  mDeltaMode = aEvent.mDeltaMode;
  mScrollAmount = aEvent.mScrollAmount;
  mCustomizedByUserPrefs = aEvent.mCustomizedByUserPrefs;
  mMayHaveMomentum = aEvent.mMayHaveMomentum;
  mIsMomentum = aEvent.mIsMomentum;
  mIsNoLineOrPageDelta = aEvent.mIsNoLineOrPageDelta;
  mLineOrPageDeltaX = aEvent.mLineOrPageDeltaX;
  mLineOrPageDeltaY = aEvent.mLineOrPageDeltaY;
  mScrollType = aEvent.mScrollType;
  mOverflowDeltaX = aEvent.mOverflowDeltaX;
  mOverflowDeltaY = aEvent.mOverflowDeltaY;
  mViewPortIsOverscrolled = aEvent.mViewPortIsOverscrolled;
  mCanTriggerSwipe = aEvent.mCanTriggerSwipe;
  mAllowToOverrideSystemScrollSpeed =
      aEvent.mAllowToOverrideSystemScrollSpeed;
  mDeltaValuesHorizontalizedForDefaultHandler =
      aEvent.mDeltaValuesHorizontalizedForDefaultHandler;
}

// System scroll speed settings may be too slow at using Gecko.  In such
// case, we should override the scroll speed computed with system settings.
// Following methods return preferred delta values which are multiplied by
// factors specified by prefs.  If system scroll speed shouldn't be
// overridden (e.g., this feature is disabled by pref), they return raw
// delta values.
double OverriddenDeltaX() const;
double OverriddenDeltaY() const;

// Compute the overridden delta value.  This may be useful for suppressing
// too fast scroll by system scroll speed overriding when widget sets
// mAllowToOverrideSystemScrollSpeed.
static double ComputeOverriddenDelta(double aDelta, bool aIsForVertical);

private:
static bool sInitialized;
static bool sIsSystemScrollSpeedOverrideEnabled;
static int32_t sOverrideFactorX;
static int32_t sOverrideFactorY;
static void Initialize();
790};

792/******************************************************************************
* mozilla::WidgetPointerEvent
******************************************************************************/

796class WidgetPointerEvent : public WidgetMouseEvent {
friend class mozilla::dom::PBrowserParent;
friend class mozilla::dom::PBrowserChild;
ALLOW_DEPRECATED_READPARAMpublic: enum { kHasDeprecatedReadParamPrivateConstructor = true
 }; template <typename, bool> friend class IPC::ReadResult
; private:

WidgetPointerEvent() = default;

public:
virtual WidgetPointerEvent* AsPointerEvent() override { return this; }

WidgetPointerEvent(bool aIsTrusted, EventMessage aMsg, nsIWidget* w,
                   const WidgetEventTime* aTime)
    : WidgetMouseEvent(aIsTrusted, aMsg, w, ePointerEventClass, eReal,
                       eNormal, aTime) {
  if (aMsg == eContextMenu) {
    mButton = (mContextMenuTrigger == eNormal) ? MouseButton::eSecondary
                                               : MouseButton::ePrimary;
  }
}

WidgetPointerEvent(bool aIsTrusted, EventMessage aMsg, nsIWidget* w,
                   ContextMenuTrigger aContextMenuTrigger = eNormal,
                   const WidgetEventTime* aTime = nullptr)
    : WidgetMouseEvent(aIsTrusted, aMsg, w, ePointerEventClass, eReal,
                       aContextMenuTrigger, aTime) {
  if (aMsg == eContextMenu) {
    mButton = (mContextMenuTrigger == eNormal) ? MouseButton::eSecondary
                                               : MouseButton::ePrimary;
  }
}

explicit WidgetPointerEvent(const WidgetMouseEvent& aEvent)
    : WidgetMouseEvent(aEvent) {
  mClass = ePointerEventClass;
}

virtual WidgetEvent* Duplicate() const override {
  MOZ_ASSERT(mClass == ePointerEventClass,do { static_assert( mozilla::detail::AssertionConditionType<
decltype(mClass == ePointerEventClass)>::isValid, "invalid assertion condition"
); if ((__builtin_expect(!!(!(!!(mClass == ePointerEventClass
))), 0))) { do { } while (false); MOZ_ReportAssertionFailure(
"mClass == ePointerEventClass" " (" "Duplicate() must be overridden by sub class"
 ")", "/var/lib/jenkins/workspace/firefox-scan-build/obj-x86_64-pc-linux-gnu/dist/include/mozilla/MouseEvents.h"
, 834); AnnotateMozCrashReason("MOZ_ASSERT" "(" "mClass == ePointerEventClass"
 ") (" "Duplicate() must be overridden by sub class" ")"); do
 { *((volatile int*)__null) = 834; __attribute__((nomerge)) ::
abort(); } while (false); } } while (false)
             "Duplicate() must be overridden by sub class")do { static_assert( mozilla::detail::AssertionConditionType<
decltype(mClass == ePointerEventClass)>::isValid, "invalid assertion condition"
); if ((__builtin_expect(!!(!(!!(mClass == ePointerEventClass
))), 0))) { do { } while (false); MOZ_ReportAssertionFailure(
"mClass == ePointerEventClass" " (" "Duplicate() must be overridden by sub class"
 ")", "/var/lib/jenkins/workspace/firefox-scan-build/obj-x86_64-pc-linux-gnu/dist/include/mozilla/MouseEvents.h"
, 834); AnnotateMozCrashReason("MOZ_ASSERT" "(" "mClass == ePointerEventClass"
 ") (" "Duplicate() must be overridden by sub class" ")"); do
 { *((volatile int*)__null) = 834; __attribute__((nomerge)) ::
abort(); } while (false); } } while (false);
  // Not copying widget, it is a weak reference.
  WidgetPointerEvent* result = new WidgetPointerEvent(
      false, mMessage, nullptr, mContextMenuTrigger, this);
  result->AssignPointerEventData(*this, true);
  result->mFlags = mFlags;
  return result;
}

int32_t mWidth = 1;
int32_t mHeight = 1;
bool mIsPrimary = true;
bool mFromTouchEvent = false;

// XXX Not tested by test_assign_event_data.html
void AssignPointerEventData(const WidgetPointerEvent& aEvent,
                            bool aCopyTargets) {
  AssignMouseEventData(aEvent, aCopyTargets);

  mWidth = aEvent.mWidth;
  mHeight = aEvent.mHeight;
  mIsPrimary = aEvent.mIsPrimary;
  mFromTouchEvent = aEvent.mFromTouchEvent;
}
858};

860}  // namespace mozilla

862#endif  // mozilla_MouseEvents_h__

←

/var/lib/jenkins/workspace/firefox-scan-build/obj-x86_64-pc-linux-gnu/dist/include/nsCOMPtr.h

1/* -*- Mode: C++; tab-width: 8; indent-tabs-mode: nil; c-basic-offset: 2 -*- */
2/* vim: set ts=8 sts=2 et sw=2 tw=80: */
3/* This Source Code Form is subject to the terms of the Mozilla Public
4 * License, v. 2.0. If a copy of the MPL was not distributed with this
5 * file, You can obtain one at http://mozilla.org/MPL/2.0/. */
6 
7#ifndef nsCOMPtr_h___
8#define nsCOMPtr_h___
9 
10/*
11 * Having problems?
12 *
13 * See the documentation at:
14 *   https://firefox-source-docs.mozilla.org/xpcom/refptr.html
15 *
16 *
17 * nsCOMPtr
18 *   better than a raw pointer
19 * for owning objects
20 *                      -- scc
21 */
22 
23#include <type_traits>
24 
25#include "mozilla/AlreadyAddRefed.h"
26#include "mozilla/Assertions.h"
27#include "mozilla/Attributes.h"
28#include "mozilla/RefPtr.h"
29#include "nsCycleCollectionNoteChild.h"
30#include "nsDebug.h"  // for |NS_ASSERTION|
31#include "nsISupportsUtils.h"  // for |nsresult|, |NS_ADDREF|, |NS_GET_TEMPLATE_IID| et al
32 
33/*
34 * WARNING: This file defines several macros for internal use only. These
35 * macros begin with the prefix |NSCAP_|. Do not use these macros in your own
36 * code. They are for internal use only for cross-platform compatibility, and
37 * are subject to change without notice.
38 */
39 
40#ifdef _MSC_VER
41// Under VC++, we win by inlining StartAssignment.
42#  define NSCAP_FEATURE_INLINE_STARTASSIGNMENT
43 
44// Also under VC++, at the highest warning level, we are overwhelmed with
45// warnings about (unused) inline functions being removed. This is to be
46// expected with templates, so we disable the warning.
47#  pragma warning(disable : 4514)
48#endif
49 
50#ifdef DEBUG1
51#  define NSCAP_FEATURE_TEST_DONTQUERY_CASES
52#endif
53 
54#ifdef __GNUC__4
55// Our use of nsCOMPtr_base::mRawPtr violates the C++ standard's aliasing
56// rules. Mark it with the may_alias attribute so that gcc 3.3 and higher
57// don't reorder instructions based on aliasing assumptions for
58// this variable.  Fortunately, gcc versions < 3.3 do not do any
59// optimizations that break nsCOMPtr.
60 
61#  define NS_MAY_ALIAS_PTR(t)t* __attribute__((__may_alias__)) t* __attribute__((__may_alias__))
62#else
63#  define NS_MAY_ALIAS_PTR(t)t* __attribute__((__may_alias__)) t*
64#endif
65 
66/*
67 * The following three macros (NSCAP_ADDREF, NSCAP_RELEASE, and
68 * NSCAP_LOG_ASSIGNMENT) allow external clients the ability to add logging or
69 * other interesting debug facilities. In fact, if you want |nsCOMPtr| to
70 * participate in the standard logging facility, you provide
71 * (e.g., in "nsISupportsImpl.h") suitable definitions
72 *
73 *   #define NSCAP_ADDREF(this, ptr)         NS_ADDREF(ptr)
74 *   #define NSCAP_RELEASE(this, ptr)        NS_RELEASE(ptr)
75 */
76 
77#ifndef NSCAP_ADDREF
78#  define NSCAP_ADDREF(this, ptr)mozilla::RefPtrTraits< typename std::remove_reference<decltype
(*ptr)>::type>::AddRef(ptr) \
79    mozilla::RefPtrTraits<        \
80        typename std::remove_reference<decltype(*ptr)>::type>::AddRef(ptr)
81#endif
82 
83#ifndef NSCAP_RELEASE
84#  define NSCAP_RELEASE(this, ptr)mozilla::RefPtrTraits< typename std::remove_reference<decltype
(*ptr)>::type>::Release(ptr) \
85    mozilla::RefPtrTraits<         \
86        typename std::remove_reference<decltype(*ptr)>::type>::Release(ptr)
87#endif
88 
89// Clients can define |NSCAP_LOG_ASSIGNMENT| to perform logging.
90#ifdef NSCAP_LOG_ASSIGNMENT
91// Remember that |NSCAP_LOG_ASSIGNMENT| was defined by some client so that we
92// know to instantiate |~nsGetterAddRefs| in turn to note the external
93// assignment into the |nsCOMPtr|.
94#  define NSCAP_LOG_EXTERNAL_ASSIGNMENT
95#else
96// ...otherwise, just strip it out of the code
97#  define NSCAP_LOG_ASSIGNMENT(this, ptr)if (ptr != nullptr) NS_LogCOMPtrAddRef((this), ToSupports(ptr
))
98#endif
99 
100#ifndef NSCAP_LOG_RELEASE
101#  define NSCAP_LOG_RELEASE(this, ptr)if (ptr) NS_LogCOMPtrRelease((this), ToSupports(ptr))
102#endif
103 
104namespace mozilla {
105template <class T>
106class OwningNonNull;
107}  // namespace mozilla
108 
109template <class T>
110inline already_AddRefed<T> dont_AddRef(T* aRawPtr) {
111  return already_AddRefed<T>(aRawPtr);
112}
113 
114template <class T>
115inline already_AddRefed<T>&& dont_AddRef(
116    already_AddRefed<T>&& aAlreadyAddRefedPtr) {
117  return std::move(aAlreadyAddRefedPtr);
118}
119 
120/*
121 * An nsCOMPtr_helper transforms commonly called getters into typesafe forms
122 * that are more convenient to call, and more efficient to use with |nsCOMPtr|s.
123 * Good candidates for helpers are |QueryInterface()|, |CreateInstance()|, etc.
124 *
125 * Here are the rules for a helper:
126 *   - it implements |operator()| to produce an interface pointer
127 *   - (except for its name) |operator()| is a valid [XP]COM `getter'
128 *   - the interface pointer that it returns is already |AddRef()|ed (as from
129 *     any good getter)
130 *   - it matches the type requested with the supplied |nsIID| argument
131 *   - its constructor provides an optional |nsresult*| that |operator()| can
132 *     fill in with an error when it is executed
133 *
134 * See |class nsGetInterface| for an example.
135 */
136class MOZ_STACK_CLASS nsCOMPtr_helper {
137 public:
138  virtual nsresult NS_FASTCALL operator()(const nsIID&, void**) const = 0;
139};
140 
141/*
142 * nsQueryInterface could have been implemented as an nsCOMPtr_helper to avoid
143 * adding specialized machinery in nsCOMPtr, but do_QueryInterface is called
144 * often enough that the codesize savings are big enough to warrant the
145 * specialcasing.
146 */
147class MOZ_STACK_CLASS nsQueryInterfaceISupports {
148 public:
149  explicit nsQueryInterfaceISupports(nsISupports* aRawPtr) : mRawPtr(aRawPtr) {}
150 
151  nsresult NS_FASTCALL operator()(const nsIID& aIID, void**) const;
152 
153 private:
154  nsISupports* MOZ_OWNING_REF mRawPtr;
155};
156 
157template <typename T>
158class MOZ_STACK_CLASS nsQueryInterface final
159    : public nsQueryInterfaceISupports {
160 public:
161  explicit nsQueryInterface(T* aRawPtr)
162      : nsQueryInterfaceISupports(ToSupports(aRawPtr)) {}
163 
164  nsresult NS_FASTCALL operator()(const nsIID& aIID, void** aAnswer) const {
165    return nsQueryInterfaceISupports::operator()(aIID, aAnswer);
166  }
167};
168 
169class MOZ_STACK_CLASS nsQueryInterfaceISupportsWithError {
170 public:
171  nsQueryInterfaceISupportsWithError(nsISupports* aRawPtr, nsresult* aError)
172      : mRawPtr(aRawPtr), mErrorPtr(aError) {}
173 
174  nsresult NS_FASTCALL operator()(const nsIID& aIID, void**) const;
175 
176 private:
177  nsISupports* MOZ_OWNING_REF mRawPtr;
178  nsresult* mErrorPtr;
179};
180 
181template <typename T>
182class MOZ_STACK_CLASS nsQueryInterfaceWithError final
183    : public nsQueryInterfaceISupportsWithError {
184 public:
185  explicit nsQueryInterfaceWithError(T* aRawPtr, nsresult* aError)
186      : nsQueryInterfaceISupportsWithError(ToSupports(aRawPtr), aError) {}
187 
188  nsresult NS_FASTCALL operator()(const nsIID& aIID, void** aAnswer) const {
189    return nsQueryInterfaceISupportsWithError::operator()(aIID, aAnswer);
190  }
191};
192 
193namespace mozilla {
194// PointedToType<> is needed so that do_QueryInterface() will work with a
195// variety of smart pointer types in addition to raw pointers. These types
196// include RefPtr<>, nsCOMPtr<>, and OwningNonNull<>.
197template <class T>
198using PointedToType = std::remove_pointer_t<decltype(&*std::declval<T>())>;
199}  // namespace mozilla
200 
201template <class T>
202inline nsQueryInterface<mozilla::PointedToType<T>> do_QueryInterface(T aPtr) {
203  return nsQueryInterface<mozilla::PointedToType<T>>(aPtr);
204}
205 
206template <class T>
207inline nsQueryInterfaceWithError<mozilla::PointedToType<T>> do_QueryInterface(
208    T aRawPtr, nsresult* aError) {
209  return nsQueryInterfaceWithError<mozilla::PointedToType<T>>(aRawPtr, aError);
210}
211 
212template <class T>
213inline void do_QueryInterface(already_AddRefed<T>&) {
214  // This signature exists solely to _stop_ you from doing the bad thing.
215  // Saying |do_QueryInterface()| on a pointer that is not otherwise owned by
216  // someone else is an automatic leak. See bug 8221.
217}
218 
219template <class T>
220inline void do_QueryInterface(already_AddRefed<T>&, nsresult*) {
221  // This signature exists solely to _stop_ you from doing the bad thing.
222  // Saying |do_QueryInterface()| on a pointer that is not otherwise owned by
223  // someone else is an automatic leak. See bug 8221.
224}
225 
226////////////////////////////////////////////////////////////////////////////
227// Using servicemanager with COMPtrs
228class nsGetServiceByCID final {
229 public:
230  explicit nsGetServiceByCID(const nsCID& aCID) : mCID(aCID) {}
231 
232  nsresult NS_FASTCALL operator()(const nsIID&, void**) const;
233 
234 private:
235  const nsCID& mCID;
236};
237 
238class nsGetServiceByCIDWithError final {
239 public:
240  nsGetServiceByCIDWithError(const nsCID& aCID, nsresult* aErrorPtr)
241      : mCID(aCID), mErrorPtr(aErrorPtr) {}
242 
243  nsresult NS_FASTCALL operator()(const nsIID&, void**) const;
244 
245 private:
246  const nsCID& mCID;
247  nsresult* mErrorPtr;
248};
249 
250class nsGetServiceByContractID final {
251 public:
252  explicit nsGetServiceByContractID(const char* aContractID)
253      : mContractID(aContractID) {}
254 
255  nsresult NS_FASTCALL operator()(const nsIID&, void**) const;
256 
257 private:
258  const char* mContractID;
259};
260 
261class nsGetServiceByContractIDWithError final {
262 public:
263  nsGetServiceByContractIDWithError(const char* aContractID,
264                                    nsresult* aErrorPtr)
265      : mContractID(aContractID), mErrorPtr(aErrorPtr) {}
266 
267  nsresult NS_FASTCALL operator()(const nsIID&, void**) const;
268 
269 private:
270  const char* mContractID;
271  nsresult* mErrorPtr;
272};
273 
274class nsIWeakReference;
275 
276// Weak references
277class MOZ_STACK_CLASS nsQueryReferent final {
278 public:
279  nsQueryReferent(nsIWeakReference* aWeakPtr, nsresult* aError)
280      : mWeakPtr(aWeakPtr), mErrorPtr(aError) {}
281 
282  nsresult NS_FASTCALL operator()(const nsIID& aIID, void**) const;
283 
284 private:
285  nsIWeakReference* MOZ_NON_OWNING_REF mWeakPtr;
286  nsresult* mErrorPtr;
287};
288 
289// template<class T> class nsGetterAddRefs;
290 
291// Helper for assert_validity method
292template <class T>
293char (&TestForIID(decltype(&NS_GET_TEMPLATE_IID(T)(T::template COMTypeInfo<T, void>::kIID))))[2];
294template <class T>
295char TestForIID(...);
296 
297template <class T>
298class MOZ_IS_REFPTR nsCOMPtr final {
299 private:
300  void assign_with_AddRef(T*);
301  template <typename U>
302  void assign_from_qi(const nsQueryInterface<U>, const nsIID&);
303  template <typename U>
304  void assign_from_qi_with_error(const nsQueryInterfaceWithError<U>&,
305                                 const nsIID&);
306  void assign_from_gs_cid(const nsGetServiceByCID, const nsIID&);
307  void assign_from_gs_cid_with_error(const nsGetServiceByCIDWithError&,
308                                     const nsIID&);
309  void assign_from_gs_contractid(const nsGetServiceByContractID, const nsIID&);
310  void assign_from_gs_contractid_with_error(
311      const nsGetServiceByContractIDWithError&, const nsIID&);
312  void assign_from_query_referent(const nsQueryReferent&, const nsIID&);
313  void assign_from_helper(const nsCOMPtr_helper&, const nsIID&);
314  void** begin_assignment();
315 
316  void assign_assuming_AddRef(T* aNewPtr) {
317    T* oldPtr = mRawPtr;
318    mRawPtr = aNewPtr;
319    NSCAP_LOG_ASSIGNMENT(this, aNewPtr)if (aNewPtr != nullptr) NS_LogCOMPtrAddRef((this), ToSupports
(aNewPtr));
320    NSCAP_LOG_RELEASE(this, oldPtr)if (oldPtr) NS_LogCOMPtrRelease((this), ToSupports(oldPtr));
321    if (oldPtr) {
322      NSCAP_RELEASE(this, oldPtr)mozilla::RefPtrTraits< typename std::remove_reference<decltype
(*oldPtr)>::type>::Release(oldPtr);
323    }
324  }
325 
326 private:
327  T* MOZ_OWNING_REF mRawPtr;
328 
329  void assert_validity() {
330    static_assert(1 < sizeof(TestForIID<T>(nullptr)),
331                  "nsCOMPtr only works "
332                  "for types with IIDs.  Either use RefPtr; add an IID to "
333                  "your type with NS_DECLARE_STATIC_IID_ACCESSOR/"
334                  "NS_DEFINE_STATIC_IID_ACCESSOR; or make the nsCOMPtr point "
335                  "to a base class with an IID.");
336  }
337 
338 public:
339  typedef T element_type;
340 
341  ~nsCOMPtr() {
342    NSCAP_LOG_RELEASE(this, mRawPtr)if (mRawPtr) NS_LogCOMPtrRelease((this), ToSupports(mRawPtr));
48
←
Branch condition evaluates to a garbage value
343    if (mRawPtr) {
344      NSCAP_RELEASE(this, mRawPtr)mozilla::RefPtrTraits< typename std::remove_reference<decltype
(*mRawPtr)>::type>::Release(mRawPtr);
345    }
346  }
347 
348#ifdef NSCAP_FEATURE_TEST_DONTQUERY_CASES
349  void Assert_NoQueryNeeded() {
350    if (!mRawPtr) {
351      return;
352    }
353    if constexpr (std::is_same_v<T, nsISupports>) {
354      // FIXME: nsCOMPtr<nsISupports> never asserted this, and it currently
355      // fails...
356      return;
357    }
358    // This can't be defined in terms of do_QueryInterface because
359    // that bans casts from a class to itself.
360    void* out = nullptr;
361    mRawPtr->QueryInterface(NS_GET_TEMPLATE_IID(T)(T::template COMTypeInfo<T, void>::kIID), &out);
362    T* query_result = static_cast<T*>(out);
363    MOZ_ASSERT(query_result == mRawPtr, "QueryInterface needed")do { static_assert( mozilla::detail::AssertionConditionType<
decltype(query_result == mRawPtr)>::isValid, "invalid assertion condition"
); if ((__builtin_expect(!!(!(!!(query_result == mRawPtr))), 0
))) { do { } while (false); MOZ_ReportAssertionFailure("query_result == mRawPtr"
 " (" "QueryInterface needed" ")", "/var/lib/jenkins/workspace/firefox-scan-build/obj-x86_64-pc-linux-gnu/dist/include/nsCOMPtr.h"
, 363); AnnotateMozCrashReason("MOZ_ASSERT" "(" "query_result == mRawPtr"
 ") (" "QueryInterface needed" ")"); do { *((volatile int*)__null
) = 363; __attribute__((nomerge)) ::abort(); } while (false);
 } } while (false);
364    NS_RELEASE(query_result)do { (query_result)->Release(); (query_result) = 0; } while
 (0);
365  }
366 
367#  define NSCAP_ASSERT_NO_QUERY_NEEDED()Assert_NoQueryNeeded(); Assert_NoQueryNeeded();
368#else
369#  define NSCAP_ASSERT_NO_QUERY_NEEDED()Assert_NoQueryNeeded();
370#endif
371 
372  // Constructors
373 
374  nsCOMPtr() : mRawPtr(nullptr) {
375    assert_validity();
376    NSCAP_LOG_ASSIGNMENT(this, nullptr)if (nullptr != nullptr) NS_LogCOMPtrAddRef((this), ToSupports
(nullptr));
377  }
378 
379  MOZ_IMPLICIT nsCOMPtr(decltype(nullptr)) : mRawPtr(nullptr) {
380    assert_validity();
381    NSCAP_LOG_ASSIGNMENT(this, nullptr)if (nullptr != nullptr) NS_LogCOMPtrAddRef((this), ToSupports
(nullptr));
382  }
383 
384  nsCOMPtr(const nsCOMPtr<T>& aSmartPtr) : mRawPtr(aSmartPtr.mRawPtr) {
385    assert_validity();
386    if (mRawPtr) {
387      NSCAP_ADDREF(this, mRawPtr)mozilla::RefPtrTraits< typename std::remove_reference<decltype
(*mRawPtr)>::type>::AddRef(mRawPtr);
388    }
389    NSCAP_LOG_ASSIGNMENT(this, aSmartPtr.mRawPtr)if (aSmartPtr.mRawPtr != nullptr) NS_LogCOMPtrAddRef((this), ToSupports
(aSmartPtr.mRawPtr));
390  }
391 
392  template <class U>
393  MOZ_IMPLICIT nsCOMPtr(const nsCOMPtr<U>& aSmartPtr)
394      : mRawPtr(aSmartPtr.get()) {
395    // Make sure that U actually inherits from T
396    static_assert(std::is_base_of<T, U>::value, "U should be a subclass of T");
397    assert_validity();
398    if (mRawPtr) {
399      NSCAP_ADDREF(this, mRawPtr)mozilla::RefPtrTraits< typename std::remove_reference<decltype
(*mRawPtr)>::type>::AddRef(mRawPtr);
400    }
401    NSCAP_LOG_ASSIGNMENT(this, aSmartPtr.get())if (aSmartPtr.get() != nullptr) NS_LogCOMPtrAddRef((this), ToSupports
(aSmartPtr.get()));
402  }
403 
404  nsCOMPtr(nsCOMPtr<T>&& aSmartPtr) : mRawPtr(aSmartPtr.mRawPtr) {
405    assert_validity();
406    aSmartPtr.mRawPtr = nullptr;
407    NSCAP_LOG_ASSIGNMENT(this, mRawPtr)if (mRawPtr != nullptr) NS_LogCOMPtrAddRef((this), ToSupports
(mRawPtr));
408  }
409 
410  template <class U>
411  MOZ_IMPLICIT nsCOMPtr(nsCOMPtr<U>&& aSmartPtr)
412      : mRawPtr(aSmartPtr.forget().template downcast<T>().take()) {
413    // Make sure that U actually inherits from T
414    static_assert(std::is_base_of<T, U>::value, "U should be a subclass of T");
415    assert_validity();
416    NSCAP_LOG_ASSIGNMENT(this, mRawPtr)if (mRawPtr != nullptr) NS_LogCOMPtrAddRef((this), ToSupports
(mRawPtr));
417    NSCAP_ASSERT_NO_QUERY_NEEDED()Assert_NoQueryNeeded();;
418  }
419 
420  MOZ_IMPLICIT nsCOMPtr(T* aRawPtr) : mRawPtr(aRawPtr) {
421    assert_validity();
422    if (mRawPtr) {
423      NSCAP_ADDREF(this, mRawPtr)mozilla::RefPtrTraits< typename std::remove_reference<decltype
(*mRawPtr)>::type>::AddRef(mRawPtr);
424    }
425    NSCAP_LOG_ASSIGNMENT(this, aRawPtr)if (aRawPtr != nullptr) NS_LogCOMPtrAddRef((this), ToSupports
(aRawPtr));
426    NSCAP_ASSERT_NO_QUERY_NEEDED()Assert_NoQueryNeeded();;
427  }
428 
429  MOZ_IMPLICIT nsCOMPtr(already_AddRefed<T>& aSmartPtr)
430      : mRawPtr(aSmartPtr.take()) {
431    assert_validity();
432    NSCAP_LOG_ASSIGNMENT(this, mRawPtr)if (mRawPtr != nullptr) NS_LogCOMPtrAddRef((this), ToSupports
(mRawPtr));
433    NSCAP_ASSERT_NO_QUERY_NEEDED()Assert_NoQueryNeeded();;
434  }
435 
436  // Construct from |otherComPtr.forget()|.
437  MOZ_IMPLICIT nsCOMPtr(already_AddRefed<T>&& aSmartPtr)
438      : mRawPtr(aSmartPtr.take()) {
439    assert_validity();
440    NSCAP_LOG_ASSIGNMENT(this, mRawPtr)if (mRawPtr != nullptr) NS_LogCOMPtrAddRef((this), ToSupports
(mRawPtr));
441    NSCAP_ASSERT_NO_QUERY_NEEDED()Assert_NoQueryNeeded();;
442  }
443 
444  // Construct from |std::move(otherRefPtr)|.
445  template <typename U>
446  MOZ_IMPLICIT nsCOMPtr(RefPtr<U>&& aSmartPtr)
447      : mRawPtr(static_cast<already_AddRefed<T>>(aSmartPtr.forget()).take()) {
448    assert_validity();
449    // Make sure that U actually inherits from T
450    static_assert(std::is_base_of<T, U>::value, "U is not a subclass of T");
451    NSCAP_LOG_ASSIGNMENT(this, mRawPtr)if (mRawPtr != nullptr) NS_LogCOMPtrAddRef((this), ToSupports
(mRawPtr));
452    NSCAP_ASSERT_NO_QUERY_NEEDED()Assert_NoQueryNeeded();;
453  }
454 
455  // Construct from |already_AddRefed|.
456  template <typename U>
457  MOZ_IMPLICIT nsCOMPtr(already_AddRefed<U>& aSmartPtr)
458      : mRawPtr(static_cast<T*>(aSmartPtr.take())) {
459    assert_validity();
460    // But make sure that U actually inherits from T.
461    static_assert(std::is_base_of<T, U>::value, "U is not a subclass of T");
462    NSCAP_LOG_ASSIGNMENT(this, static_cast<T*>(mRawPtr))if (static_cast<T*>(mRawPtr) != nullptr) NS_LogCOMPtrAddRef
((this), ToSupports(static_cast<T*>(mRawPtr)));
463    NSCAP_ASSERT_NO_QUERY_NEEDED()Assert_NoQueryNeeded();;
464  }
465 
466  // Construct from |otherComPtr.forget()|.
467  template <typename U>
468  MOZ_IMPLICIT nsCOMPtr(already_AddRefed<U>&& aSmartPtr)
469      : mRawPtr(static_cast<T*>(aSmartPtr.take())) {
470    assert_validity();
471    // But make sure that U actually inherits from T.
472    static_assert(std::is_base_of<T, U>::value, "U is not a subclass of T");
473    NSCAP_LOG_ASSIGNMENT(this, static_cast<T*>(mRawPtr))if (static_cast<T*>(mRawPtr) != nullptr) NS_LogCOMPtrAddRef
((this), ToSupports(static_cast<T*>(mRawPtr)));
474    NSCAP_ASSERT_NO_QUERY_NEEDED()Assert_NoQueryNeeded();;
475  }
476 
477  // Construct from |do_QueryInterface(expr)|.
478  template <typename U>
479  MOZ_IMPLICIT nsCOMPtr(const nsQueryInterface<U> aQI) : mRawPtr(nullptr) {
480    assert_validity();
481    NSCAP_LOG_ASSIGNMENT(this, nullptr)if (nullptr != nullptr) NS_LogCOMPtrAddRef((this), ToSupports
(nullptr));
482    assign_from_qi(aQI, NS_GET_TEMPLATE_IID(T)(T::template COMTypeInfo<T, void>::kIID));
483  }
484 
485  // Construct from |do_QueryInterface(expr, &rv)|.
486  template <typename U>
487  MOZ_IMPLICIT nsCOMPtr(const nsQueryInterfaceWithError<U>& aQI)
488      : mRawPtr(nullptr) {
489    assert_validity();
490    NSCAP_LOG_ASSIGNMENT(this, nullptr)if (nullptr != nullptr) NS_LogCOMPtrAddRef((this), ToSupports
(nullptr));
491    assign_from_qi_with_error(aQI, NS_GET_TEMPLATE_IID(T)(T::template COMTypeInfo<T, void>::kIID));
492  }
493 
494  // Construct from |do_GetService(cid_expr)|.
495  MOZ_IMPLICIT nsCOMPtr(const nsGetServiceByCID aGS) : mRawPtr(nullptr) {
496    assert_validity();
497    NSCAP_LOG_ASSIGNMENT(this, nullptr)if (nullptr != nullptr) NS_LogCOMPtrAddRef((this), ToSupports
(nullptr));
498    assign_from_gs_cid(aGS, NS_GET_TEMPLATE_IID(T)(T::template COMTypeInfo<T, void>::kIID));
499  }
500 
501  // Construct from |do_GetService(cid_expr, &rv)|.
502  MOZ_IMPLICIT nsCOMPtr(const nsGetServiceByCIDWithError& aGS)
503      : mRawPtr(nullptr) {
504    assert_validity();
505    NSCAP_LOG_ASSIGNMENT(this, nullptr)if (nullptr != nullptr) NS_LogCOMPtrAddRef((this), ToSupports
(nullptr));
506    assign_from_gs_cid_with_error(aGS, NS_GET_TEMPLATE_IID(T)(T::template COMTypeInfo<T, void>::kIID));
507  }
508 
509  // Construct from |do_GetService(contractid_expr)|.
510  MOZ_IMPLICIT nsCOMPtr(const nsGetServiceByContractID aGS) : mRawPtr(nullptr) {
511    assert_validity();
512    NSCAP_LOG_ASSIGNMENT(this, nullptr)if (nullptr != nullptr) NS_LogCOMPtrAddRef((this), ToSupports
(nullptr));
513    assign_from_gs_contractid(aGS, NS_GET_TEMPLATE_IID(T)(T::template COMTypeInfo<T, void>::kIID));
514  }
515 
516  // Construct from |do_GetService(contractid_expr, &rv)|.
517  MOZ_IMPLICIT nsCOMPtr(const nsGetServiceByContractIDWithError& aGS)
518      : mRawPtr(nullptr) {
519    assert_validity();
520    NSCAP_LOG_ASSIGNMENT(this, nullptr)if (nullptr != nullptr) NS_LogCOMPtrAddRef((this), ToSupports
(nullptr));
521    assign_from_gs_contractid_with_error(aGS, NS_GET_TEMPLATE_IID(T)(T::template COMTypeInfo<T, void>::kIID));
522  }
523 
524  // Construct from |do_QueryReferent(ptr)|
525  MOZ_IMPLICIT nsCOMPtr(const nsQueryReferent& aQueryReferent)
526      : mRawPtr(nullptr) {
527    assert_validity();
528    NSCAP_LOG_ASSIGNMENT(this, nullptr)if (nullptr != nullptr) NS_LogCOMPtrAddRef((this), ToSupports
(nullptr));
529    assign_from_query_referent(aQueryReferent, NS_GET_TEMPLATE_IID(T)(T::template COMTypeInfo<T, void>::kIID));
530  }
531 
532  // And finally, anything else we might need to construct from can exploit the
533  // nsCOMPtr_helper facility.
534  MOZ_IMPLICIT nsCOMPtr(const nsCOMPtr_helper& aHelper) : mRawPtr(nullptr) {
535    assert_validity();
536    NSCAP_LOG_ASSIGNMENT(this, nullptr)if (nullptr != nullptr) NS_LogCOMPtrAddRef((this), ToSupports
(nullptr));
537    assign_from_helper(aHelper, NS_GET_TEMPLATE_IID(T)(T::template COMTypeInfo<T, void>::kIID));
538    NSCAP_ASSERT_NO_QUERY_NEEDED()Assert_NoQueryNeeded();;
539  }
540 
541  // construct from |mozilla::NotNull|.
542  template <typename I,
543            typename = std::enable_if_t<!std::is_same_v<I, nsCOMPtr<T>> &&
544                                        std::is_convertible_v<I, nsCOMPtr<T>>>>
545  MOZ_IMPLICIT nsCOMPtr(const mozilla::NotNull<I>& aSmartPtr)
546      : mRawPtr(nsCOMPtr<T>(aSmartPtr.get()).forget().take()) {}
547 
548  // construct from |mozilla::MovingNotNull|.
549  template <typename I,
550            typename = std::enable_if_t<!std::is_same_v<I, nsCOMPtr<T>> &&
551                                        std::is_convertible_v<I, nsCOMPtr<T>>>>
552  MOZ_IMPLICIT nsCOMPtr(mozilla::MovingNotNull<I>&& aSmartPtr)
553      : mRawPtr(
554            nsCOMPtr<T>(std::move(aSmartPtr).unwrapBasePtr()).forget().take()) {
555  }
556 
557  // Defined in OwningNonNull.h
558  template <class U>
559  MOZ_IMPLICIT nsCOMPtr(const mozilla::OwningNonNull<U>& aOther);
560 
561  // Assignment operators
562 
563  nsCOMPtr<T>& operator=(const nsCOMPtr<T>& aRhs) {
564    assign_with_AddRef(aRhs.mRawPtr);
565    return *this;
566  }
567 
568  template <class U>
569  nsCOMPtr<T>& operator=(const nsCOMPtr<U>& aRhs) {
570    // Make sure that U actually inherits from T
571    static_assert(std::is_base_of<T, U>::value, "U should be a subclass of T");
572    assign_with_AddRef(aRhs.get());
573    return *this;
574  }
575 
576  nsCOMPtr<T>& operator=(nsCOMPtr<T>&& aRhs) {
577    assign_assuming_AddRef(aRhs.forget().take());
578    return *this;
579  }
580 
581  template <class U>
582  nsCOMPtr<T>& operator=(nsCOMPtr<U>&& aRhs) {
583    // Make sure that U actually inherits from T
584    static_assert(std::is_base_of<T, U>::value, "U should be a subclass of T");
585    assign_assuming_AddRef(aRhs.forget().template downcast<T>().take());
586    NSCAP_ASSERT_NO_QUERY_NEEDED()Assert_NoQueryNeeded();;
587    return *this;
588  }
589 
590  nsCOMPtr<T>& operator=(T* aRhs) {
591    assign_with_AddRef(aRhs);
592    NSCAP_ASSERT_NO_QUERY_NEEDED()Assert_NoQueryNeeded();;
593    return *this;
594  }
595 
596  nsCOMPtr<T>& operator=(decltype(nullptr)) {
597    assign_assuming_AddRef(nullptr);
598    return *this;
599  }
600 
601  // Assign from |already_AddRefed|.
602  template <typename U>
603  nsCOMPtr<T>& operator=(already_AddRefed<U>& aRhs) {
604    // Make sure that U actually inherits from T
605    static_assert(std::is_base_of<T, U>::value, "U is not a subclass of T");
606    assign_assuming_AddRef(static_cast<T*>(aRhs.take()));
607    NSCAP_ASSERT_NO_QUERY_NEEDED()Assert_NoQueryNeeded();;
608    return *this;
609  }
610 
611  // Assign from |otherComPtr.forget()|.
612  template <typename U>
613  nsCOMPtr<T>& operator=(already_AddRefed<U>&& aRhs) {
614    // Make sure that U actually inherits from T
615    static_assert(std::is_base_of<T, U>::value, "U is not a subclass of T");
616    assign_assuming_AddRef(static_cast<T*>(aRhs.take()));
617    NSCAP_ASSERT_NO_QUERY_NEEDED()Assert_NoQueryNeeded();;
618    return *this;
619  }
620 
621  // Assign from |std::move(otherRefPtr)|.
622  template <typename U>
623  nsCOMPtr<T>& operator=(RefPtr<U>&& aRhs) {
624    // Make sure that U actually inherits from T
625    static_assert(std::is_base_of<T, U>::value, "U is not a subclass of T");
626    assign_assuming_AddRef(static_cast<T*>(aRhs.forget().take()));
627    NSCAP_ASSERT_NO_QUERY_NEEDED()Assert_NoQueryNeeded();;
628    return *this;
629  }
630 
631  // Assign from |do_QueryInterface(expr)|.
632  template <typename U>
633  nsCOMPtr<T>& operator=(const nsQueryInterface<U> aRhs) {
634    assign_from_qi(aRhs, NS_GET_TEMPLATE_IID(T)(T::template COMTypeInfo<T, void>::kIID));
635    return *this;
636  }
637 
638  // Assign from |do_QueryInterface(expr, &rv)|.
639  template <typename U>
640  nsCOMPtr<T>& operator=(const nsQueryInterfaceWithError<U>& aRhs) {
641    assign_from_qi_with_error(aRhs, NS_GET_TEMPLATE_IID(T)(T::template COMTypeInfo<T, void>::kIID));
642    return *this;
643  }
644 
645  // Assign from |do_GetService(cid_expr)|.
646  nsCOMPtr<T>& operator=(const nsGetServiceByCID aRhs) {
647    assign_from_gs_cid(aRhs, NS_GET_TEMPLATE_IID(T)(T::template COMTypeInfo<T, void>::kIID));
648    return *this;
649  }
650 
651  // Assign from |do_GetService(cid_expr, &rv)|.
652  nsCOMPtr<T>& operator=(const nsGetServiceByCIDWithError& aRhs) {
653    assign_from_gs_cid_with_error(aRhs, NS_GET_TEMPLATE_IID(T)(T::template COMTypeInfo<T, void>::kIID));
654    return *this;
655  }
656 
657  // Assign from |do_GetService(contractid_expr)|.
658  nsCOMPtr<T>& operator=(const nsGetServiceByContractID aRhs) {
659    assign_from_gs_contractid(aRhs, NS_GET_TEMPLATE_IID(T)(T::template COMTypeInfo<T, void>::kIID));
660    return *this;
661  }
662 
663  // Assign from |do_GetService(contractid_expr, &rv)|.
664  nsCOMPtr<T>& operator=(const nsGetServiceByContractIDWithError& aRhs) {
665    assign_from_gs_contractid_with_error(aRhs, NS_GET_TEMPLATE_IID(T)(T::template COMTypeInfo<T, void>::kIID));
666    return *this;
667  }
668 
669  // Assign from |do_QueryReferent(ptr)|.
670  nsCOMPtr<T>& operator=(const nsQueryReferent& aRhs) {
671    assign_from_query_referent(aRhs, NS_GET_TEMPLATE_IID(T)(T::template COMTypeInfo<T, void>::kIID));
672    return *this;
673  }
674 
675  // And finally, anything else we might need to assign from can exploit the
676  // nsCOMPtr_helper facility.
677  nsCOMPtr<T>& operator=(const nsCOMPtr_helper& aRhs) {
678    assign_from_helper(aRhs, NS_GET_TEMPLATE_IID(T)(T::template COMTypeInfo<T, void>::kIID));
679    NSCAP_ASSERT_NO_QUERY_NEEDED()Assert_NoQueryNeeded();;
680    return *this;
681  }
682 
683  // Assign from |mozilla::NotNull|.
684  template <typename I,
685            typename = std::enable_if_t<std::is_convertible_v<I, nsCOMPtr<T>>>>
686  nsCOMPtr<T>& operator=(const mozilla::NotNull<I>& aSmartPtr) {
687    assign_assuming_AddRef(nsCOMPtr<T>(aSmartPtr.get()).forget().take());
688    return *this;
689  }
690 
691  // Assign from |mozilla::MovingNotNull|.
692  template <typename I,
693            typename = std::enable_if_t<std::is_convertible_v<I, nsCOMPtr<T>>>>
694  nsCOMPtr<T>& operator=(mozilla::MovingNotNull<I>&& aSmartPtr) {
695    assign_assuming_AddRef(
696        nsCOMPtr<T>(std::move(aSmartPtr).unwrapBasePtr()).forget().take());
697    return *this;
698  }
699 
700  // Defined in OwningNonNull.h
701  template <class U>
702  nsCOMPtr<T>& operator=(const mozilla::OwningNonNull<U>& aOther);
703 
704  // Exchange ownership with |aRhs|; can save a pair of refcount operations.
705  void swap(nsCOMPtr<T>& aRhs) {
706    T* temp = aRhs.mRawPtr;
707    NSCAP_LOG_ASSIGNMENT(&aRhs, mRawPtr)if (mRawPtr != nullptr) NS_LogCOMPtrAddRef((&aRhs), ToSupports
(mRawPtr));
708    NSCAP_LOG_ASSIGNMENT(this, temp)if (temp != nullptr) NS_LogCOMPtrAddRef((this), ToSupports(temp
));
709    NSCAP_LOG_RELEASE(this, mRawPtr)if (mRawPtr) NS_LogCOMPtrRelease((this), ToSupports(mRawPtr));
710    NSCAP_LOG_RELEASE(&aRhs, temp)if (temp) NS_LogCOMPtrRelease((&aRhs), ToSupports(temp));
711    aRhs.mRawPtr = mRawPtr;
712    mRawPtr = temp;
713    // |aRhs| maintains the same invariants, so we don't need to
714    // |NSCAP_ASSERT_NO_QUERY_NEEDED|
715  }
716 
717  // Exchange ownership with |aRhs|; can save a pair of refcount operations.
718  void swap(T*& aRhs) {
719    T* temp = aRhs;
720    NSCAP_LOG_ASSIGNMENT(this, temp)if (temp != nullptr) NS_LogCOMPtrAddRef((this), ToSupports(temp
));
721    NSCAP_LOG_RELEASE(this, mRawPtr)if (mRawPtr) NS_LogCOMPtrRelease((this), ToSupports(mRawPtr));
722    aRhs = reinterpret_cast<T*>(mRawPtr);
723    mRawPtr = temp;
724    NSCAP_ASSERT_NO_QUERY_NEEDED()Assert_NoQueryNeeded();;
725  }
726 
727  // Other pointer operators
728 
729  // Return the value of mRawPtr and null out mRawPtr. Useful for
730  // already_AddRefed return values.
731  already_AddRefed<T> MOZ_MAY_CALL_AFTER_MUST_RETURN forget() {
732    T* temp = nullptr;
733    swap(temp);
734    return already_AddRefed<T>(temp);
735  }
736 
737  // Set the target of aRhs to the value of mRawPtr and null out mRawPtr.
738  // Useful to avoid unnecessary AddRef/Release pairs with "out" parameters
739  // where aRhs bay be a T** or an I** where I is a base class of T.
740  template <typename I>
741  void forget(I** aRhs) {
742    NS_ASSERTION(aRhs, "Null pointer passed to forget!")do { if (!(aRhs)) { NS_DebugBreak(NS_DEBUG_ASSERTION, "Null pointer passed to forget!"
, "aRhs", "/var/lib/jenkins/workspace/firefox-scan-build/obj-x86_64-pc-linux-gnu/dist/include/nsCOMPtr.h"
, 742); MOZ_PretendNoReturn(); } } while (0);
743    NSCAP_LOG_RELEASE(this, mRawPtr)if (mRawPtr) NS_LogCOMPtrRelease((this), ToSupports(mRawPtr));
744    *aRhs = get();
745    mRawPtr = nullptr;
746  }
747 
748  // Prefer the implicit conversion provided automatically by
749  // |operator T*() const|. Use |get()| to resolve ambiguity or to get a
750  // castable pointer.
751  T* get() const { return reinterpret_cast<T*>(mRawPtr); }
752 
753  // Makes an nsCOMPtr act like its underlying raw pointer type whenever it is
754  // used in a context where a raw pointer is expected. It is this operator
755  // that makes an nsCOMPtr substitutable for a raw pointer.
756  //
757  // Prefer the implicit use of this operator to calling |get()|, except where
758  // necessary to resolve ambiguity.
759  operator T*() const& { return get(); }
760 
761  // Don't allow implicit conversion of temporary nsCOMPtr to raw pointer,
762  // because the refcount might be one and the pointer will immediately become
763  // invalid.
764  operator T*() const&& = delete;
765 
766  // Needed to avoid the deleted operator above
767  explicit operator bool() const { return !!mRawPtr; }
768 
769  T* operator->() const MOZ_NO_ADDREF_RELEASE_ON_RETURN {
770    MOZ_ASSERT(mRawPtr != nullptr,do { static_assert( mozilla::detail::AssertionConditionType<
decltype(mRawPtr != nullptr)>::isValid, "invalid assertion condition"
); if ((__builtin_expect(!!(!(!!(mRawPtr != nullptr))), 0))) {
 do { } while (false); MOZ_ReportAssertionFailure("mRawPtr != nullptr"
 " (" "You can't dereference a NULL nsCOMPtr with operator->()."
 ")", "/var/lib/jenkins/workspace/firefox-scan-build/obj-x86_64-pc-linux-gnu/dist/include/nsCOMPtr.h"
, 771); AnnotateMozCrashReason("MOZ_ASSERT" "(" "mRawPtr != nullptr"
 ") (" "You can't dereference a NULL nsCOMPtr with operator->()."
 ")"); do { *((volatile int*)__null) = 771; __attribute__((nomerge
)) ::abort(); } while (false); } } while (false)
771               "You can't dereference a NULL nsCOMPtr with operator->().")do { static_assert( mozilla::detail::AssertionConditionType<
decltype(mRawPtr != nullptr)>::isValid, "invalid assertion condition"
); if ((__builtin_expect(!!(!(!!(mRawPtr != nullptr))), 0))) {
 do { } while (false); MOZ_ReportAssertionFailure("mRawPtr != nullptr"
 " (" "You can't dereference a NULL nsCOMPtr with operator->()."
 ")", "/var/lib/jenkins/workspace/firefox-scan-build/obj-x86_64-pc-linux-gnu/dist/include/nsCOMPtr.h"
, 771); AnnotateMozCrashReason("MOZ_ASSERT" "(" "mRawPtr != nullptr"
 ") (" "You can't dereference a NULL nsCOMPtr with operator->()."
 ")"); do { *((volatile int*)__null) = 771; __attribute__((nomerge
)) ::abort(); } while (false); } } while (false);
772    return get();
773  }
774 
775  // These are not intended to be used by clients. See |address_of| below.
776  nsCOMPtr<T>* get_address() { return this; }
777  const nsCOMPtr<T>* get_address() const { return this; }
778 
779 public:
780  T& operator*() const {
781    MOZ_ASSERT(mRawPtr != nullptr,do { static_assert( mozilla::detail::AssertionConditionType<
decltype(mRawPtr != nullptr)>::isValid, "invalid assertion condition"
); if ((__builtin_expect(!!(!(!!(mRawPtr != nullptr))), 0))) {
 do { } while (false); MOZ_ReportAssertionFailure("mRawPtr != nullptr"
 " (" "You can't dereference a NULL nsCOMPtr with operator*()."
 ")", "/var/lib/jenkins/workspace/firefox-scan-build/obj-x86_64-pc-linux-gnu/dist/include/nsCOMPtr.h"
, 782); AnnotateMozCrashReason("MOZ_ASSERT" "(" "mRawPtr != nullptr"
 ") (" "You can't dereference a NULL nsCOMPtr with operator*()."
 ")"); do { *((volatile int*)__null) = 782; __attribute__((nomerge
)) ::abort(); } while (false); } } while (false)
782               "You can't dereference a NULL nsCOMPtr with operator*().")do { static_assert( mozilla::detail::AssertionConditionType<
decltype(mRawPtr != nullptr)>::isValid, "invalid assertion condition"
); if ((__builtin_expect(!!(!(!!(mRawPtr != nullptr))), 0))) {
 do { } while (false); MOZ_ReportAssertionFailure("mRawPtr != nullptr"
 " (" "You can't dereference a NULL nsCOMPtr with operator*()."
 ")", "/var/lib/jenkins/workspace/firefox-scan-build/obj-x86_64-pc-linux-gnu/dist/include/nsCOMPtr.h"
, 782); AnnotateMozCrashReason("MOZ_ASSERT" "(" "mRawPtr != nullptr"
 ") (" "You can't dereference a NULL nsCOMPtr with operator*()."
 ")"); do { *((volatile int*)__null) = 782; __attribute__((nomerge
)) ::abort(); } while (false); } } while (false);
783    return *get();
784  }
785 
786  T** StartAssignment() {
787#ifndef NSCAP_FEATURE_INLINE_STARTASSIGNMENT
788    return reinterpret_cast<T**>(begin_assignment());
789#else
790    assign_assuming_AddRef(nullptr);
791    return reinterpret_cast<T**>(&mRawPtr);
792#endif
793  }
794};
795 
796template <typename T>
797inline void ImplCycleCollectionUnlink(nsCOMPtr<T>& aField) {
798  aField = nullptr;
799}
800 
801template <typename T>
802inline void ImplCycleCollectionTraverse(
803    nsCycleCollectionTraversalCallback& aCallback, nsCOMPtr<T>& aField,
804    const char* aName, uint32_t aFlags = 0) {
805  CycleCollectionNoteChild(aCallback, aField.get(), aName, aFlags);
806}
807 
808template <class T>
809void nsCOMPtr<T>::assign_with_AddRef(T* aRawPtr) {
810  if (aRawPtr) {
811    NSCAP_ADDREF(this, aRawPtr)mozilla::RefPtrTraits< typename std::remove_reference<decltype
(*aRawPtr)>::type>::AddRef(aRawPtr);
812  }
813  assign_assuming_AddRef(aRawPtr);
814}
815 
816template <class T>
817template <typename U>
818void nsCOMPtr<T>::assign_from_qi(const nsQueryInterface<U> aQI,
819                                 const nsIID& aIID) {
820  // Allow QIing to nsISupports from nsISupports as a special-case, since
821  // SameCOMIdentity uses it.
822  static_assert(
823      std::is_same_v<T, nsISupports> ||
824          !(std::is_same_v<T, U> || std::is_base_of<T, U>::value),
825      "don't use do_QueryInterface for compile-time-determinable casts");
826  void* newRawPtr;
827  if (NS_FAILED(aQI(aIID, &newRawPtr))((bool)(__builtin_expect(!!(NS_FAILED_impl(aQI(aIID, &newRawPtr
))), 0)))) {
828    newRawPtr = nullptr;
829  }
830  assign_assuming_AddRef(static_cast<T*>(newRawPtr));
831}
832 
833template <class T>
834template <typename U>
835void nsCOMPtr<T>::assign_from_qi_with_error(
836    const nsQueryInterfaceWithError<U>& aQI, const nsIID& aIID) {
837  static_assert(
838      !(std::is_same_v<T, U> || std::is_base_of<T, U>::value),
839      "don't use do_QueryInterface for compile-time-determinable casts");
840  void* newRawPtr;
841  if (NS_FAILED(aQI(aIID, &newRawPtr))((bool)(__builtin_expect(!!(NS_FAILED_impl(aQI(aIID, &newRawPtr
))), 0)))) {
842    newRawPtr = nullptr;
843  }
844  assign_assuming_AddRef(static_cast<T*>(newRawPtr));
845}
846 
847template <class T>
848void nsCOMPtr<T>::assign_from_gs_cid(const nsGetServiceByCID aGS,
849                                     const nsIID& aIID) {
850  void* newRawPtr;
851  if (NS_FAILED(aGS(aIID, &newRawPtr))((bool)(__builtin_expect(!!(NS_FAILED_impl(aGS(aIID, &newRawPtr
))), 0)))) {
852    newRawPtr = nullptr;
853  }
854  assign_assuming_AddRef(static_cast<T*>(newRawPtr));
855}
856 
857template <class T>
858void nsCOMPtr<T>::assign_from_gs_cid_with_error(
859    const nsGetServiceByCIDWithError& aGS, const nsIID& aIID) {
860  void* newRawPtr;
861  if (NS_FAILED(aGS(aIID, &newRawPtr))((bool)(__builtin_expect(!!(NS_FAILED_impl(aGS(aIID, &newRawPtr
))), 0)))) {
862    newRawPtr = nullptr;
863  }
864  assign_assuming_AddRef(static_cast<T*>(newRawPtr));
865}
866 
867template <class T>
868void nsCOMPtr<T>::assign_from_gs_contractid(const nsGetServiceByContractID aGS,
869                                            const nsIID& aIID) {
870  void* newRawPtr;
871  if (NS_FAILED(aGS(aIID, &newRawPtr))((bool)(__builtin_expect(!!(NS_FAILED_impl(aGS(aIID, &newRawPtr
))), 0)))) {
872    newRawPtr = nullptr;
873  }
874  assign_assuming_AddRef(static_cast<T*>(newRawPtr));
875}
876 
877template <class T>
878void nsCOMPtr<T>::assign_from_gs_contractid_with_error(
879    const nsGetServiceByContractIDWithError& aGS, const nsIID& aIID) {
880  void* newRawPtr;
881  if (NS_FAILED(aGS(aIID, &newRawPtr))((bool)(__builtin_expect(!!(NS_FAILED_impl(aGS(aIID, &newRawPtr
))), 0)))) {
882    newRawPtr = nullptr;
883  }
884  assign_assuming_AddRef(static_cast<T*>(newRawPtr));
885}
886 
887template <class T>
888void nsCOMPtr<T>::assign_from_query_referent(
889    const nsQueryReferent& aQueryReferent, const nsIID& aIID) {
890  void* newRawPtr;
891  if (NS_FAILED(aQueryReferent(aIID, &newRawPtr))((bool)(__builtin_expect(!!(NS_FAILED_impl(aQueryReferent(aIID
, &newRawPtr))), 0)))) {
892    newRawPtr = nullptr;
893  }
894  assign_assuming_AddRef(static_cast<T*>(newRawPtr));
895}
896 
897template <class T>
898void nsCOMPtr<T>::assign_from_helper(const nsCOMPtr_helper& helper,
899                                     const nsIID& aIID) {
900  void* newRawPtr;
901  if (NS_FAILED(helper(aIID, &newRawPtr))((bool)(__builtin_expect(!!(NS_FAILED_impl(helper(aIID, &
newRawPtr))), 0)))) {
902    newRawPtr = nullptr;
903  }
904  assign_assuming_AddRef(static_cast<T*>(newRawPtr));
905}
906 
907template <class T>
908void** nsCOMPtr<T>::begin_assignment() {
909  assign_assuming_AddRef(nullptr);
910  union {
911    T** mT;
912    void** mVoid;
913  } result;
914  result.mT = &mRawPtr;
915  return result.mVoid;
916}
917 
918template <class T>
919inline nsCOMPtr<T>* address_of(nsCOMPtr<T>& aPtr) {
920  return aPtr.get_address();
921}
922 
923template <class T>
924inline const nsCOMPtr<T>* address_of(const nsCOMPtr<T>& aPtr) {
925  return aPtr.get_address();
926}
927 
928/**
929 * This class is designed to be used for anonymous temporary objects in the
930 * argument list of calls that return COM interface pointers, e.g.,
931 *
932 *   nsCOMPtr<IFoo> fooP;
933 *   ...->QueryInterface(iid, getter_AddRefs(fooP))
934 *
935 * DO NOT USE THIS TYPE DIRECTLY IN YOUR CODE. Use |getter_AddRefs()| instead.
936 *
937 * When initialized with a |nsCOMPtr|, as in the example above, it returns
938 * a |void**|, a |T**|, or an |nsISupports**| as needed, that the outer call
939 * (|QueryInterface| in this case) can fill in.
940 *
941 * This type should be a nested class inside |nsCOMPtr<T>|.
942 */
943template <class T>
944class nsGetterAddRefs {
945 public:
946  explicit nsGetterAddRefs(nsCOMPtr<T>& aSmartPtr)
947      : mTargetSmartPtr(aSmartPtr) {}
948 
949#if defined(NSCAP_FEATURE_TEST_DONTQUERY_CASES) || \
950    defined(NSCAP_LOG_EXTERNAL_ASSIGNMENT)
951  ~nsGetterAddRefs() {
952#  ifdef NSCAP_LOG_EXTERNAL_ASSIGNMENT
953    NSCAP_LOG_ASSIGNMENT(reinterpret_cast<void*>(address_of(mTargetSmartPtr)),if (mTargetSmartPtr.get() != nullptr) NS_LogCOMPtrAddRef((reinterpret_cast
<void*>(address_of(mTargetSmartPtr))), ToSupports(mTargetSmartPtr
.get()))
954                         mTargetSmartPtr.get())if (mTargetSmartPtr.get() != nullptr) NS_LogCOMPtrAddRef((reinterpret_cast
<void*>(address_of(mTargetSmartPtr))), ToSupports(mTargetSmartPtr
.get()));
955#  endif
956 
957#  ifdef NSCAP_FEATURE_TEST_DONTQUERY_CASES
958    mTargetSmartPtr.Assert_NoQueryNeeded();
959#  endif
960  }
961#endif
962 
963  operator void**() {
964    return reinterpret_cast<void**>(mTargetSmartPtr.StartAssignment());
965  }
966 
967  operator T**() { return mTargetSmartPtr.StartAssignment(); }
968  T*& operator*() { return *(mTargetSmartPtr.StartAssignment()); }
969 
970 private:
971  nsCOMPtr<T>& mTargetSmartPtr;
972};
973 
974template <>
975class nsGetterAddRefs<nsISupports> {
976 public:
977  explicit nsGetterAddRefs(nsCOMPtr<nsISupports>& aSmartPtr)
978      : mTargetSmartPtr(aSmartPtr) {}
979 
980#ifdef NSCAP_LOG_EXTERNAL_ASSIGNMENT
981  ~nsGetterAddRefs() {
982    NSCAP_LOG_ASSIGNMENT(reinterpret_cast<void*>(address_of(mTargetSmartPtr)),if (mTargetSmartPtr.get() != nullptr) NS_LogCOMPtrAddRef((reinterpret_cast
<void*>(address_of(mTargetSmartPtr))), ToSupports(mTargetSmartPtr
.get()))
983                         mTargetSmartPtr.get())if (mTargetSmartPtr.get() != nullptr) NS_LogCOMPtrAddRef((reinterpret_cast
<void*>(address_of(mTargetSmartPtr))), ToSupports(mTargetSmartPtr
.get()));
984  }
985#endif
986 
987  operator void**() {
988    return reinterpret_cast<void**>(mTargetSmartPtr.StartAssignment());
989  }
990 
991  operator nsISupports**() { return mTargetSmartPtr.StartAssignment(); }
992  nsISupports*& operator*() { return *(mTargetSmartPtr.StartAssignment()); }
993 
994 private:
995  nsCOMPtr<nsISupports>& mTargetSmartPtr;
996};
997 
998template <class T>
999inline nsGetterAddRefs<T> getter_AddRefs(nsCOMPtr<T>& aSmartPtr) {
1000  return nsGetterAddRefs<T>(aSmartPtr);
1001}
1002 
1003template <class T, class DestinationType>
1004inline nsresult CallQueryInterface(
1005    T* aSource, nsGetterAddRefs<DestinationType> aDestination) {
1006  return CallQueryInterface(aSource,
1007                            static_cast<DestinationType**>(aDestination));
1008}
1009 
1010// Comparing two |nsCOMPtr|s
1011 
1012template <class T, class U>
1013inline bool operator==(const nsCOMPtr<T>& aLhs, const nsCOMPtr<U>& aRhs) {
1014  return static_cast<const T*>(aLhs.get()) == static_cast<const U*>(aRhs.get());
1015}
1016 
1017template <class T, class U>
1018inline bool operator!=(const nsCOMPtr<T>& aLhs, const nsCOMPtr<U>& aRhs) {
1019  return static_cast<const T*>(aLhs.get()) != static_cast<const U*>(aRhs.get());
1020}
1021 
1022// Comparing an |nsCOMPtr| to a raw pointer
1023 
1024template <class T, class U>
1025inline bool operator==(const nsCOMPtr<T>& aLhs, const U* aRhs) {
1026  return static_cast<const T*>(aLhs.get()) == aRhs;
1027}
1028 
1029template <class T, class U>
1030inline bool operator==(const U* aLhs, const nsCOMPtr<T>& aRhs) {
1031  return aLhs == static_cast<const T*>(aRhs.get());
1032}
1033 
1034template <class T, class U>
1035inline bool operator!=(const nsCOMPtr<T>& aLhs, const U* aRhs) {
1036  return static_cast<const T*>(aLhs.get()) != aRhs;
1037}
1038 
1039template <class T, class U>
1040inline bool operator!=(const U* aLhs, const nsCOMPtr<T>& aRhs) {
1041  return aLhs != static_cast<const T*>(aRhs.get());
1042}
1043 
1044template <class T, class U>
1045inline bool operator==(const nsCOMPtr<T>& aLhs, U* aRhs) {
1046  return static_cast<const T*>(aLhs.get()) == const_cast<const U*>(aRhs);
1047}
1048 
1049template <class T, class U>
1050inline bool operator==(U* aLhs, const nsCOMPtr<T>& aRhs) {
1051  return const_cast<const U*>(aLhs) == static_cast<const T*>(aRhs.get());
1052}
1053 
1054template <class T, class U>
1055inline bool operator!=(const nsCOMPtr<T>& aLhs, U* aRhs) {
1056  return static_cast<const T*>(aLhs.get()) != const_cast<const U*>(aRhs);
1057}
1058 
1059template <class T, class U>
1060inline bool operator!=(U* aLhs, const nsCOMPtr<T>& aRhs) {
1061  return const_cast<const U*>(aLhs) != static_cast<const T*>(aRhs.get());
1062}
1063 
1064// Comparing an |nsCOMPtr| to |nullptr|
1065 
1066template <class T>
1067inline bool operator==(const nsCOMPtr<T>& aLhs, decltype(nullptr)) {
1068  return aLhs.get() == nullptr;
1069}
1070 
1071template <class T>
1072inline bool operator==(decltype(nullptr), const nsCOMPtr<T>& aRhs) {
1073  return nullptr == aRhs.get();
1074}
1075 
1076template <class T>
1077inline bool operator!=(const nsCOMPtr<T>& aLhs, decltype(nullptr)) {
1078  return aLhs.get() != nullptr;
1079}
1080 
1081template <class T>
1082inline bool operator!=(decltype(nullptr), const nsCOMPtr<T>& aRhs) {
1083  return nullptr != aRhs.get();
1084}
1085 
1086// Comparing any two [XP]COM objects for identity
1087 
1088inline bool SameCOMIdentity(nsISupports* aLhs, nsISupports* aRhs) {
1089  return nsCOMPtr<nsISupports>(do_QueryInterface(aLhs)) ==
1090         nsCOMPtr<nsISupports>(do_QueryInterface(aRhs));
1091}
1092 
1093template <class SourceType, class DestinationType>
1094inline nsresult CallQueryInterface(nsCOMPtr<SourceType>& aSourcePtr,
1095                                   DestinationType** aDestPtr) {
1096  return CallQueryInterface(aSourcePtr.get(), aDestPtr);
1097}
1098 
1099template <class T>
1100RefPtr<T>::RefPtr(const nsQueryReferent& aQueryReferent) {
1101  void* newRawPtr;
1102  if (NS_FAILED(aQueryReferent(NS_GET_TEMPLATE_IID(T), &newRawPtr))((bool)(__builtin_expect(!!(NS_FAILED_impl(aQueryReferent((T::
template COMTypeInfo<T, void>::kIID), &newRawPtr)))
, 0)))) {
1103    newRawPtr = nullptr;
1104  }
1105  mRawPtr = static_cast<T*>(newRawPtr);
1106}
1107 
1108template <class T>
1109RefPtr<T>::RefPtr(const nsCOMPtr_helper& aHelper) {
1110  void* newRawPtr;
1111  if (NS_FAILED(aHelper(NS_GET_TEMPLATE_IID(T), &newRawPtr))((bool)(__builtin_expect(!!(NS_FAILED_impl(aHelper((T::template
 COMTypeInfo<T, void>::kIID), &newRawPtr))), 0)))) {
1112    newRawPtr = nullptr;
1113  }
1114  mRawPtr = static_cast<T*>(newRawPtr);
1115}
1116 
1117template <class T>
1118RefPtr<T>& RefPtr<T>::operator=(const nsQueryReferent& aQueryReferent) {
1119  void* newRawPtr;
1120  if (NS_FAILED(aQueryReferent(NS_GET_TEMPLATE_IID(T), &newRawPtr))((bool)(__builtin_expect(!!(NS_FAILED_impl(aQueryReferent((T::
template COMTypeInfo<T, void>::kIID), &newRawPtr)))
, 0)))) {
1121    newRawPtr = nullptr;
1122  }
1123  assign_assuming_AddRef(static_cast<T*>(newRawPtr));
1124  return *this;
1125}
1126 
1127template <class T>
1128RefPtr<T>& RefPtr<T>::operator=(const nsCOMPtr_helper& aHelper) {
1129  void* newRawPtr;
1130  if (NS_FAILED(aHelper(NS_GET_TEMPLATE_IID(T), &newRawPtr))((bool)(__builtin_expect(!!(NS_FAILED_impl(aHelper((T::template
 COMTypeInfo<T, void>::kIID), &newRawPtr))), 0)))) {
1131    newRawPtr = nullptr;
1132  }
1133  assign_assuming_AddRef(static_cast<T*>(newRawPtr));
1134  return *this;
1135}
1136 
1137template <class T>
1138inline already_AddRefed<T> do_AddRef(const nsCOMPtr<T>& aObj) {
1139  nsCOMPtr<T> ref(aObj);
1140  return ref.forget();
1141}
1142 
1143// MOZ_DBG support
1144 
1145template <class T>
1146std::ostream& operator<<(std::ostream& aOut, const nsCOMPtr<T>& aObj) {
1147  return mozilla::DebugValue(aOut, aObj.get());
1148}
1149 
1150// ToRefPtr allows to move an nsCOMPtr<T> into a RefPtr<T>. Be mindful when
1151// using this, because usually RefPtr<T> should only be used with concrete T and
1152// nsCOMPtr<T> should only be used with XPCOM interface T.
1153template <class T>
1154RefPtr<T> ToRefPtr(nsCOMPtr<T>&& aObj) {
1155  return aObj.forget();
1156}
1157 
1158// Integration with ResultExtensions.h
1159template <typename R>
1160auto ResultRefAsParam(nsCOMPtr<R>& aResult) {
1161  return getter_AddRefs(aResult);
1162}
1163 
1164namespace mozilla::detail {
1165template <typename T>
1166struct outparam_as_pointer;
1167 
1168template <typename T>
1169struct outparam_as_pointer<nsGetterAddRefs<T>> {
1170  using type = T**;
1171};
1172}  // namespace mozilla::detail
1173 
1174#endif  // !defined(nsCOMPtr_h___)