| File: | root/firefox-clang/obj-x86_64-pc-linux-gnu/parser/htmlparser/./../../../parser/htmlparser/nsParser.cpp |
| Warning: | line 327, column 20 Although the value stored to 'result' is used in the enclosing expression, the value is never actually read from 'result' |
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| 1 | /* This Source Code Form is subject to the terms of the Mozilla Public |
| 2 | * License, v. 2.0. If a copy of the MPL was not distributed with this |
| 3 | * file, You can obtain one at http://mozilla.org/MPL/2.0/. */ |
| 4 | |
| 5 | #include "nsAtom.h" |
| 6 | #include "nsParser.h" |
| 7 | #include "nsString.h" |
| 8 | #include "nsCRT.h" |
| 9 | #include "nsScanner.h" |
| 10 | #include "plstr.h" |
| 11 | #include "nsIChannel.h" |
| 12 | #include "nsIInputStream.h" |
| 13 | #include "prenv.h" |
| 14 | #include "prlock.h" |
| 15 | #include "prcvar.h" |
| 16 | #include "nsReadableUtils.h" |
| 17 | #include "nsCOMPtr.h" |
| 18 | #include "nsExpatDriver.h" |
| 19 | #include "nsIFragmentContentSink.h" |
| 20 | #include "nsStreamUtils.h" |
| 21 | #include "nsXPCOMCIDInternal.h" |
| 22 | #include "nsMimeTypes.h" |
| 23 | #include "nsCharsetSource.h" |
| 24 | #include "nsThreadUtils.h" |
| 25 | |
| 26 | #include "mozilla/CondVar.h" |
| 27 | #include "mozilla/dom/ScriptLoader.h" |
| 28 | #include "mozilla/Encoding.h" |
| 29 | #include "mozilla/Mutex.h" |
| 30 | |
| 31 | using namespace mozilla; |
| 32 | |
| 33 | #define NS_PARSER_FLAG_PENDING_CONTINUE_EVENT0x00000001 0x00000001 |
| 34 | #define NS_PARSER_FLAG_CAN_TOKENIZE0x00000002 0x00000002 |
| 35 | |
| 36 | //-------------- Begin ParseContinue Event Definition ------------------------ |
| 37 | /* |
| 38 | The parser can be explicitly interrupted by passing a return value of |
| 39 | NS_ERROR_HTMLPARSER_INTERRUPTED from BuildModel on the DTD. This will cause |
| 40 | the parser to stop processing and allow the application to return to the event |
| 41 | loop. The data which was left at the time of interruption will be processed |
| 42 | the next time OnDataAvailable is called. If the parser has received its final |
| 43 | chunk of data then OnDataAvailable will no longer be called by the networking |
| 44 | module, so the parser will schedule a nsParserContinueEvent which will call |
| 45 | the parser to process the remaining data after returning to the event loop. |
| 46 | If the parser is interrupted while processing the remaining data it will |
| 47 | schedule another ParseContinueEvent. The processing of data followed by |
| 48 | scheduling of the continue events will proceed until either: |
| 49 | |
| 50 | 1) All of the remaining data can be processed without interrupting |
| 51 | 2) The parser has been cancelled. |
| 52 | |
| 53 | The nsContentSink records the time when the chunk has started processing and |
| 54 | will return NS_ERROR_HTMLPARSER_INTERRUPTED if the token processing time has |
| 55 | exceeded a threshold called max tokenizing processing time. This allows the |
| 56 | content sink to limit how much data is processed in a single chunk which in |
| 57 | turn gates how much time is spent away from the event loop. Processing smaller |
| 58 | chunks of data also reduces the time spent in subsequent reflows. |
| 59 | |
| 60 | This capability is most apparent when loading large documents. If the maximum |
| 61 | token processing time is set small enough the application will remain |
| 62 | responsive during document load. |
| 63 | |
| 64 | A side-effect of this capability is that document load is not complete when |
| 65 | the last chunk of data is passed to OnDataAvailable since the parser may have |
| 66 | been interrupted when the last chunk of data arrived. The document is complete |
| 67 | when all of the document has been tokenized and there aren't any pending |
| 68 | nsParserContinueEvents. This can cause problems if the application assumes |
| 69 | that it can monitor the load requests to determine when the document load has |
| 70 | been completed. This is what happens in Mozilla. The document is considered |
| 71 | completely loaded when all of the load requests have been satisfied. |
| 72 | |
| 73 | Currently the parser is ignores requests to be interrupted during the |
| 74 | processing of script. This is because a document.write followed by JavaScript |
| 75 | calls to manipulate the DOM may fail if the parser was interrupted during the |
| 76 | document.write. |
| 77 | |
| 78 | For more details @see bugzilla bug 76722 |
| 79 | */ |
| 80 | |
| 81 | class nsParserContinueEvent : public Runnable { |
| 82 | public: |
| 83 | RefPtr<nsParser> mParser; |
| 84 | |
| 85 | explicit nsParserContinueEvent(nsParser* aParser) |
| 86 | : mozilla::Runnable("nsParserContinueEvent"), mParser(aParser) {} |
| 87 | |
| 88 | NS_IMETHODvirtual nsresult Run() override { |
| 89 | mParser->HandleParserContinueEvent(this); |
| 90 | return NS_OK; |
| 91 | } |
| 92 | }; |
| 93 | |
| 94 | //-------------- End ParseContinue Event Definition ------------------------ |
| 95 | |
| 96 | /** |
| 97 | * default constructor |
| 98 | */ |
| 99 | nsParser::nsParser() : mCharset(WINDOWS_1252_ENCODING) { Initialize(); } |
| 100 | |
| 101 | nsParser::~nsParser() { Cleanup(); } |
| 102 | |
| 103 | void nsParser::Initialize() { |
| 104 | mContinueEvent = nullptr; |
| 105 | mCharsetSource = kCharsetUninitialized; |
| 106 | mCharset = WINDOWS_1252_ENCODING; |
| 107 | mInternalState = NS_OK; |
| 108 | mStreamStatus = NS_OK; |
| 109 | mCommand = eViewNormal; |
| 110 | mBlocked = 0; |
| 111 | mFlags = NS_PARSER_FLAG_CAN_TOKENIZE0x00000002; |
| 112 | |
| 113 | mProcessingNetworkData = false; |
| 114 | mOnStopPending = false; |
| 115 | } |
| 116 | |
| 117 | void nsParser::Cleanup() { |
| 118 | // It should not be possible for this flag to be set when we are getting |
| 119 | // destroyed since this flag implies a pending nsParserContinueEvent, which |
| 120 | // has an owning reference to |this|. |
| 121 | NS_ASSERTION(!(mFlags & NS_PARSER_FLAG_PENDING_CONTINUE_EVENT), "bad")do { if (!(!(mFlags & 0x00000001))) { NS_DebugBreak(NS_DEBUG_ASSERTION , "bad", "!(mFlags & NS_PARSER_FLAG_PENDING_CONTINUE_EVENT)" , "./../../../parser/htmlparser/nsParser.cpp", 121); MOZ_PretendNoReturn (); } } while (0); |
| 122 | } |
| 123 | |
| 124 | NS_IMPL_CYCLE_COLLECTION_CLASS(nsParser)nsParser::cycleCollection nsParser::_cycleCollectorGlobal; |
| 125 | |
| 126 | NS_IMPL_CYCLE_COLLECTION_UNLINK_BEGIN(nsParser)void nsParser::cycleCollection::Unlink(void* p) { nsParser* tmp = DowncastCCParticipant<nsParser>(p); |
| 127 | NS_IMPL_CYCLE_COLLECTION_UNLINK(mExpatDriver)ImplCycleCollectionUnlink(tmp->mExpatDriver); |
| 128 | NS_IMPL_CYCLE_COLLECTION_UNLINK(mSink)ImplCycleCollectionUnlink(tmp->mSink); |
| 129 | NS_IMPL_CYCLE_COLLECTION_UNLINK_WEAK_REFERENCEtmp->ClearWeakReferences(); |
| 130 | NS_IMPL_CYCLE_COLLECTION_UNLINK_END(void)tmp; } |
| 131 | |
| 132 | NS_IMPL_CYCLE_COLLECTION_TRAVERSE_BEGIN(nsParser)nsresult nsParser::cycleCollection::TraverseNative( void* p, nsCycleCollectionTraversalCallback & cb) { nsParser* tmp = DowncastCCParticipant<nsParser >(p); cb.DescribeRefCountedNode(tmp->mRefCnt.get(), "nsParser" ); |
| 133 | NS_IMPL_CYCLE_COLLECTION_TRAVERSE(mExpatDriver)ImplCycleCollectionTraverse(cb, tmp->mExpatDriver, "mExpatDriver" , 0); |
| 134 | NS_IMPL_CYCLE_COLLECTION_TRAVERSE(mSink)ImplCycleCollectionTraverse(cb, tmp->mSink, "mSink", 0); |
| 135 | NS_IMPL_CYCLE_COLLECTION_TRAVERSE_END(void)tmp; return NS_OK; } |
| 136 | |
| 137 | NS_IMPL_CYCLE_COLLECTING_ADDREF(nsParser)MozExternalRefCountType nsParser::AddRef(void) { static_assert (!std::is_destructible_v<nsParser>, "Reference-counted class " "nsParser" " 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" ")", "./../../../parser/htmlparser/nsParser.cpp" , 137); AnnotateMozCrashReason("MOZ_ASSERT" "(" "int32_t(mRefCnt) >= 0" ") (" "illegal refcnt" ")"); do { MOZ_CrashSequence(__null, 137 ); __attribute__((nomerge)) ::abort(); } while (false); } } while (false); _mOwningThread.AssertOwnership("nsParser" " not thread-safe" ); nsISupports* base = nsParser::cycleCollection::Upcast(this ); nsrefcnt count = mRefCnt.incr(base); NS_LogAddRef((this), ( count), ("nsParser"), (uint32_t)(sizeof(*this))); return count ; } |
| 138 | NS_IMPL_CYCLE_COLLECTING_RELEASE(nsParser)MozExternalRefCountType nsParser::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" ")", "./../../../parser/htmlparser/nsParser.cpp" , 138); AnnotateMozCrashReason("MOZ_ASSERT" "(" "int32_t(mRefCnt) > 0" ") (" "dup release" ")"); do { MOZ_CrashSequence(__null, 138 ); __attribute__((nomerge)) ::abort(); } while (false); } } while (false); _mOwningThread.AssertOwnership("nsParser" " not thread-safe" ); nsISupports* base = nsParser::cycleCollection::Upcast(this ); nsrefcnt count = mRefCnt.decr(base); if (count == 0) { NS_CycleCollectableHasRefCntZero (); } NS_LogRelease((this), (count), ("nsParser")); return count ; } void nsParser::DeleteCycleCollectable(void) { delete (this ); } |
| 139 | NS_INTERFACE_MAP_BEGIN_CYCLE_COLLECTION(nsParser)nsresult nsParser::QueryInterface(const nsIID& aIID, void ** aInstancePtr) { do { if (!(aInstancePtr)) { NS_DebugBreak( NS_DEBUG_ASSERTION, "QueryInterface requires a non-NULL destination!" , "aInstancePtr", "./../../../parser/htmlparser/nsParser.cpp" , 139); MOZ_PretendNoReturn(); } } while (0); nsISupports* foundInterface ; if (TopThreeWordsEquals( aIID, (nsXPCOMCycleCollectionParticipant ::kIID), (nsCycleCollectionISupports::kIID)) && (LowWordEquals (aIID, (nsXPCOMCycleCollectionParticipant::kIID)) || LowWordEquals (aIID, (nsCycleCollectionISupports::kIID)))) { if (LowWordEquals (aIID, (nsXPCOMCycleCollectionParticipant::kIID))) { *aInstancePtr = nsParser::cycleCollection::GetParticipant(); return NS_OK; } if (LowWordEquals(aIID, (nsCycleCollectionISupports::kIID) )) { *aInstancePtr = nsParser::cycleCollection::Upcast(this); return NS_OK; } foundInterface = nullptr; } else |
| 140 | NS_INTERFACE_MAP_ENTRY(nsIStreamListener)if (aIID.Equals(mozilla::detail::kImplementedIID<std::remove_reference_t <decltype(*this)>, nsIStreamListener>)) foundInterface = static_cast<nsIStreamListener*>(this); else |
| 141 | NS_INTERFACE_MAP_ENTRY(nsIParser)if (aIID.Equals(mozilla::detail::kImplementedIID<std::remove_reference_t <decltype(*this)>, nsIParser>)) foundInterface = static_cast <nsIParser*>(this); else |
| 142 | NS_INTERFACE_MAP_ENTRY(nsIRequestObserver)if (aIID.Equals(mozilla::detail::kImplementedIID<std::remove_reference_t <decltype(*this)>, nsIRequestObserver>)) foundInterface = static_cast<nsIRequestObserver*>(this); else |
| 143 | NS_INTERFACE_MAP_ENTRY(nsISupportsWeakReference)if (aIID.Equals(mozilla::detail::kImplementedIID<std::remove_reference_t <decltype(*this)>, nsISupportsWeakReference>)) foundInterface = static_cast<nsISupportsWeakReference*>(this); else |
| 144 | NS_INTERFACE_MAP_ENTRY_AMBIGUOUS(nsISupports, nsIParser)if (aIID.Equals(mozilla::detail::kImplementedIID<std::remove_reference_t <decltype(*this)>, nsISupports>)) foundInterface = static_cast <nsISupports*>(static_cast<nsIParser*>(this)); else |
| 145 | NS_INTERFACE_MAP_ENDfoundInterface = 0; nsresult status; if (!foundInterface) { do { static_assert( mozilla::detail::AssertionConditionType< decltype(!aIID.Equals((nsISupports::kIID)))>::isValid, "invalid assertion condition" ); if ((__builtin_expect(!!(!(!!(!aIID.Equals((nsISupports::kIID ))))), 0))) { do { } while (false); MOZ_ReportAssertionFailure ("!aIID.Equals((nsISupports::kIID))", "./../../../parser/htmlparser/nsParser.cpp" , 145); AnnotateMozCrashReason("MOZ_ASSERT" "(" "!aIID.Equals((nsISupports::kIID))" ")"); do { MOZ_CrashSequence(__null, 145); __attribute__((nomerge )) ::abort(); } while (false); } } while (false); status = NS_NOINTERFACE ; } else { (foundInterface)->AddRef(); status = NS_OK; } * aInstancePtr = foundInterface; return status; } |
| 146 | |
| 147 | // The parser continue event is posted only if |
| 148 | // all of the data to parse has been passed to ::OnDataAvailable |
| 149 | // and the parser has been interrupted by the content sink |
| 150 | // because the processing of tokens took too long. |
| 151 | |
| 152 | nsresult nsParser::PostContinueEvent() { |
| 153 | if (!(mFlags & NS_PARSER_FLAG_PENDING_CONTINUE_EVENT0x00000001)) { |
| 154 | // If this flag isn't set, then there shouldn't be a live continue event! |
| 155 | NS_ASSERTION(!mContinueEvent, "bad")do { if (!(!mContinueEvent)) { NS_DebugBreak(NS_DEBUG_ASSERTION , "bad", "!mContinueEvent", "./../../../parser/htmlparser/nsParser.cpp" , 155); MOZ_PretendNoReturn(); } } while (0); |
| 156 | |
| 157 | // This creates a reference cycle between this and the event that is |
| 158 | // broken when the event fires. |
| 159 | nsCOMPtr<nsIRunnable> event = new nsParserContinueEvent(this); |
| 160 | if (NS_FAILED(NS_DispatchToCurrentThread(event))((bool)(__builtin_expect(!!(NS_FAILED_impl(NS_DispatchToCurrentThread (event))), 0)))) { |
| 161 | NS_WARNING("failed to dispatch parser continuation event")NS_DebugBreak(NS_DEBUG_WARNING, "failed to dispatch parser continuation event" , nullptr, "./../../../parser/htmlparser/nsParser.cpp", 161); |
| 162 | } else { |
| 163 | mFlags |= NS_PARSER_FLAG_PENDING_CONTINUE_EVENT0x00000001; |
| 164 | mContinueEvent = event; |
| 165 | } |
| 166 | } |
| 167 | return NS_OK; |
| 168 | } |
| 169 | |
| 170 | NS_IMETHODIMP_(void)void |
| 171 | nsParser::GetCommand(nsCString& aCommand) { aCommand = mCommandStr; } |
| 172 | |
| 173 | /** |
| 174 | * Call this method once you've created a parser, and want to instruct it |
| 175 | * about the command which caused the parser to be constructed. For example, |
| 176 | * this allows us to select a DTD which can do, say, view-source. |
| 177 | * |
| 178 | * @param aCommand the command string to set |
| 179 | */ |
| 180 | NS_IMETHODIMP_(void)void |
| 181 | nsParser::SetCommand(const char* aCommand) { |
| 182 | mCommandStr.Assign(aCommand); |
| 183 | if (mCommandStr.EqualsLiteral("view-source")) { |
| 184 | mCommand = eViewSource; |
| 185 | } else if (mCommandStr.EqualsLiteral("view-fragment")) { |
| 186 | mCommand = eViewFragment; |
| 187 | } else { |
| 188 | mCommand = eViewNormal; |
| 189 | } |
| 190 | } |
| 191 | |
| 192 | /** |
| 193 | * Call this method once you've created a parser, and want to instruct it |
| 194 | * about the command which caused the parser to be constructed. For example, |
| 195 | * this allows us to select a DTD which can do, say, view-source. |
| 196 | * |
| 197 | * @param aParserCommand the command to set |
| 198 | */ |
| 199 | NS_IMETHODIMP_(void)void |
| 200 | nsParser::SetCommand(eParserCommands aParserCommand) { |
| 201 | mCommand = aParserCommand; |
| 202 | } |
| 203 | |
| 204 | /** |
| 205 | * Call this method once you've created a parser, and want to instruct it |
| 206 | * about what charset to load |
| 207 | * |
| 208 | * @param aCharset- the charset of a document |
| 209 | * @param aCharsetSource- the source of the charset |
| 210 | */ |
| 211 | void nsParser::SetDocumentCharset(NotNull<const Encoding*> aCharset, |
| 212 | int32_t aCharsetSource, |
| 213 | bool aForceAutoDetection) { |
| 214 | mCharset = aCharset; |
| 215 | mCharsetSource = aCharsetSource; |
| 216 | if (mParserContext) { |
| 217 | mParserContext->mScanner.SetDocumentCharset(aCharset, aCharsetSource); |
| 218 | } |
| 219 | } |
| 220 | |
| 221 | void nsParser::SetSinkCharset(NotNull<const Encoding*> aCharset) { |
| 222 | if (mSink) { |
| 223 | mSink->SetDocumentCharset(aCharset); |
| 224 | } |
| 225 | } |
| 226 | |
| 227 | /** |
| 228 | * This method gets called in order to set the content |
| 229 | * sink for this parser to dump nodes to. |
| 230 | * |
| 231 | * @param nsIContentSink interface for node receiver |
| 232 | */ |
| 233 | NS_IMETHODIMP_(void)void |
| 234 | nsParser::SetContentSink(nsIContentSink* aSink) { |
| 235 | MOZ_ASSERT(aSink, "sink cannot be null!")do { static_assert( mozilla::detail::AssertionConditionType< decltype(aSink)>::isValid, "invalid assertion condition"); if ((__builtin_expect(!!(!(!!(aSink))), 0))) { do { } while ( false); MOZ_ReportAssertionFailure("aSink" " (" "sink cannot be null!" ")", "./../../../parser/htmlparser/nsParser.cpp", 235); AnnotateMozCrashReason ("MOZ_ASSERT" "(" "aSink" ") (" "sink cannot be null!" ")"); do { MOZ_CrashSequence(__null, 235); __attribute__((nomerge)) :: abort(); } while (false); } } while (false); |
| 236 | mSink = aSink; |
| 237 | |
| 238 | if (mSink) { |
| 239 | mSink->SetParser(this); |
| 240 | } |
| 241 | } |
| 242 | |
| 243 | /** |
| 244 | * retrieve the sink set into the parser |
| 245 | * @return current sink |
| 246 | */ |
| 247 | NS_IMETHODIMP_(nsIContentSink*)nsIContentSink* |
| 248 | nsParser::GetContentSink() { return mSink; } |
| 249 | |
| 250 | //////////////////////////////////////////////////////////////////////// |
| 251 | |
| 252 | /** |
| 253 | * This gets called just prior to the model actually |
| 254 | * being constructed. It's important to make this the |
| 255 | * last thing that happens right before parsing, so we |
| 256 | * can delay until the last moment the resolution of |
| 257 | * which DTD to use (unless of course we're assigned one). |
| 258 | */ |
| 259 | nsresult nsParser::WillBuildModel() { |
| 260 | if (!mParserContext) return NS_ERROR_HTMLPARSER_INVALIDPARSERCONTEXT; |
| 261 | |
| 262 | if (mInternalState == NS_ERROR_OUT_OF_MEMORY) { |
| 263 | // Checking NS_ERROR_OUT_OF_MEMORY instead of NS_FAILED |
| 264 | // to avoid introducing unintentional changes to behavior. |
| 265 | return mInternalState; |
| 266 | } |
| 267 | |
| 268 | if (eUnknownDetect != mParserContext->mAutoDetectStatus) return NS_OK; |
| 269 | |
| 270 | if (eDTDMode_autodetect == mParserContext->mDTDMode) { |
| 271 | mParserContext->mDTDMode = eDTDMode_full_standards; |
| 272 | mParserContext->mDocType = eXML; |
| 273 | } // else XML fragment with nested parser context |
| 274 | |
| 275 | // We always find a DTD. |
| 276 | mParserContext->mAutoDetectStatus = ePrimaryDetect; |
| 277 | |
| 278 | // Quick check for view source. |
| 279 | MOZ_ASSERT(mParserContext->mParserCommand != eViewSource,do { static_assert( mozilla::detail::AssertionConditionType< decltype(mParserContext->mParserCommand != eViewSource)> ::isValid, "invalid assertion condition"); if ((__builtin_expect (!!(!(!!(mParserContext->mParserCommand != eViewSource))), 0))) { do { } while (false); MOZ_ReportAssertionFailure("mParserContext->mParserCommand != eViewSource" " (" "The old parser is not supposed to be used for View Source " "anymore." ")", "./../../../parser/htmlparser/nsParser.cpp", 281); AnnotateMozCrashReason("MOZ_ASSERT" "(" "mParserContext->mParserCommand != eViewSource" ") (" "The old parser is not supposed to be used for View Source " "anymore." ")"); do { MOZ_CrashSequence(__null, 281); __attribute__ ((nomerge)) ::abort(); } while (false); } } while (false) |
| 280 | "The old parser is not supposed to be used for View Source "do { static_assert( mozilla::detail::AssertionConditionType< decltype(mParserContext->mParserCommand != eViewSource)> ::isValid, "invalid assertion condition"); if ((__builtin_expect (!!(!(!!(mParserContext->mParserCommand != eViewSource))), 0))) { do { } while (false); MOZ_ReportAssertionFailure("mParserContext->mParserCommand != eViewSource" " (" "The old parser is not supposed to be used for View Source " "anymore." ")", "./../../../parser/htmlparser/nsParser.cpp", 281); AnnotateMozCrashReason("MOZ_ASSERT" "(" "mParserContext->mParserCommand != eViewSource" ") (" "The old parser is not supposed to be used for View Source " "anymore." ")"); do { MOZ_CrashSequence(__null, 281); __attribute__ ((nomerge)) ::abort(); } while (false); } } while (false) |
| 281 | "anymore.")do { static_assert( mozilla::detail::AssertionConditionType< decltype(mParserContext->mParserCommand != eViewSource)> ::isValid, "invalid assertion condition"); if ((__builtin_expect (!!(!(!!(mParserContext->mParserCommand != eViewSource))), 0))) { do { } while (false); MOZ_ReportAssertionFailure("mParserContext->mParserCommand != eViewSource" " (" "The old parser is not supposed to be used for View Source " "anymore." ")", "./../../../parser/htmlparser/nsParser.cpp", 281); AnnotateMozCrashReason("MOZ_ASSERT" "(" "mParserContext->mParserCommand != eViewSource" ") (" "The old parser is not supposed to be used for View Source " "anymore." ")"); do { MOZ_CrashSequence(__null, 281); __attribute__ ((nomerge)) ::abort(); } while (false); } } while (false); |
| 282 | |
| 283 | RefPtr<nsExpatDriver> expat = new nsExpatDriver(); |
| 284 | nsresult rv = expat->Initialize(mParserContext->mScanner.GetURI(), mSink); |
| 285 | 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, "./../../../parser/htmlparser/nsParser.cpp" , 285); return rv; } } while (false); |
| 286 | |
| 287 | mExpatDriver = expat.forget(); |
| 288 | |
| 289 | return mSink->WillBuildModel(); |
| 290 | } |
| 291 | |
| 292 | /** |
| 293 | * This gets called when the parser is done with its input. |
| 294 | */ |
| 295 | void nsParser::DidBuildModel() { |
| 296 | if (IsComplete() && mParserContext) { |
| 297 | // Let sink know if we're about to end load because we've been terminated. |
| 298 | // In that case we don't want it to run deferred scripts. |
| 299 | bool terminated = mInternalState == NS_ERROR_HTMLPARSER_STOPPARSING; |
| 300 | if (mExpatDriver && mSink) { |
| 301 | mExpatDriver->DidBuildModel(); |
| 302 | mSink->DidBuildModel(terminated); |
| 303 | } |
| 304 | |
| 305 | // Ref. to bug 61462. |
| 306 | mParserContext->mRequest = nullptr; |
| 307 | } |
| 308 | } |
| 309 | |
| 310 | /** |
| 311 | * Call this when you want to *force* the parser to terminate the |
| 312 | * parsing process altogether. This is binary -- so once you terminate |
| 313 | * you can't resume without restarting altogether. |
| 314 | */ |
| 315 | NS_IMETHODIMPnsresult |
| 316 | nsParser::Terminate(void) { |
| 317 | // We should only call DidBuildModel once, so don't do anything if this is |
| 318 | // the second time that Terminate has been called. |
| 319 | if (mInternalState == NS_ERROR_HTMLPARSER_STOPPARSING) { |
| 320 | return NS_OK; |
| 321 | } |
| 322 | |
| 323 | nsresult result = NS_OK; |
| 324 | // XXX - [ until we figure out a way to break parser-sink circularity ] |
| 325 | // Hack - Hold a reference until we are completely done... |
| 326 | nsCOMPtr<nsIParser> kungFuDeathGrip(this); |
| 327 | mInternalState = result = NS_ERROR_HTMLPARSER_STOPPARSING; |
Although the value stored to 'result' is used in the enclosing expression, the value is never actually read from 'result' | |
| 328 | |
| 329 | // @see bug 108049 |
| 330 | // If NS_PARSER_FLAG_PENDING_CONTINUE_EVENT is set then reset it so |
| 331 | // DidBuildModel will call DidBuildModel on the DTD. Note: The IsComplete() |
| 332 | // call inside of DidBuildModel looks at the pendingContinueEvents flag. |
| 333 | if (mFlags & NS_PARSER_FLAG_PENDING_CONTINUE_EVENT0x00000001) { |
| 334 | NS_ASSERTION(mContinueEvent, "mContinueEvent is null")do { if (!(mContinueEvent)) { NS_DebugBreak(NS_DEBUG_ASSERTION , "mContinueEvent is null", "mContinueEvent", "./../../../parser/htmlparser/nsParser.cpp" , 334); MOZ_PretendNoReturn(); } } while (0); |
| 335 | // Revoke the pending continue parsing event |
| 336 | mContinueEvent = nullptr; |
| 337 | mFlags &= ~NS_PARSER_FLAG_PENDING_CONTINUE_EVENT0x00000001; |
| 338 | } |
| 339 | |
| 340 | if (mExpatDriver) { |
| 341 | mExpatDriver->Terminate(); |
| 342 | DidBuildModel(); |
| 343 | } else if (mSink) { |
| 344 | // We have no parser context or no DTD yet (so we got terminated before we |
| 345 | // got any data). Manually break the reference cycle with the sink. |
| 346 | result = mSink->DidBuildModel(true); |
| 347 | NS_ENSURE_SUCCESS(result, result)do { nsresult __rv = result; 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", "result", "result", static_cast< uint32_t>(__rv), name ? " (" : "", name ? name : "", name ? ")" : ""); NS_DebugBreak(NS_DEBUG_WARNING, msg.get(), nullptr , "./../../../parser/htmlparser/nsParser.cpp", 347); return result ; } } while (false); |
| 348 | } |
| 349 | |
| 350 | return NS_OK; |
| 351 | } |
| 352 | |
| 353 | NS_IMETHODIMPnsresult |
| 354 | nsParser::ContinueInterruptedParsing() { |
| 355 | if (mInternalState == NS_ERROR_OUT_OF_MEMORY) { |
| 356 | // Checking NS_ERROR_OUT_OF_MEMORY instead of NS_FAILED |
| 357 | // to avoid introducing unintentional changes to behavior. |
| 358 | return mInternalState; |
| 359 | } |
| 360 | |
| 361 | if (mBlocked) { |
| 362 | // Whatever blocked the parser is responsible for ensuring |
| 363 | // that we don't stall. |
| 364 | return NS_OK; |
| 365 | } |
| 366 | |
| 367 | // If there are scripts executing, this is probably due to a synchronous |
| 368 | // XMLHttpRequest, see bug 460706 and 1938290. |
| 369 | if (IsScriptExecuting()) { |
| 370 | ContinueParsingDocumentAfterCurrentScript(); |
| 371 | return NS_OK; |
| 372 | } |
| 373 | |
| 374 | if (mProcessingNetworkData) { |
| 375 | // The call already on stack is responsible for ensuring that we |
| 376 | // don't stall. |
| 377 | return NS_OK; |
| 378 | } |
| 379 | |
| 380 | // If the stream has already finished, there's a good chance |
| 381 | // that we might start closing things down when the parser |
| 382 | // is reenabled. To make sure that we're not deleted across |
| 383 | // the reenabling process, hold a reference to ourselves. |
| 384 | nsresult result = NS_OK; |
| 385 | nsCOMPtr<nsIParser> kungFuDeathGrip(this); |
| 386 | nsCOMPtr<nsIContentSink> sinkDeathGrip(mSink); |
| 387 | |
| 388 | bool isFinalChunk = |
| 389 | mParserContext && mParserContext->mStreamListenerState == eOnStop; |
| 390 | |
| 391 | mProcessingNetworkData = true; |
| 392 | if (sinkDeathGrip) { |
| 393 | sinkDeathGrip->WillParse(); |
| 394 | } |
| 395 | result = ResumeParse(true, isFinalChunk); // Ref. bug 57999 |
| 396 | |
| 397 | // Bug 1899786 added a flag for deferring `eOnStop`, so `isFinalChunk` |
| 398 | // above may be false. Let's run the logic from bug 1899786: |
| 399 | // Check if someone spun the event loop while we were parsing (XML |
| 400 | // script...) If so, and OnStop was called during the spin, process it |
| 401 | // now. |
| 402 | if ((result == NS_OK) && mOnStopPending) { |
| 403 | mOnStopPending = false; |
| 404 | mParserContext->mStreamListenerState = eOnStop; |
| 405 | mParserContext->mScanner.SetIncremental(false); |
| 406 | |
| 407 | if (sinkDeathGrip) { |
| 408 | sinkDeathGrip->WillParse(); |
| 409 | } |
| 410 | result = ResumeParse(true, true); |
| 411 | } |
| 412 | mProcessingNetworkData = false; |
| 413 | |
| 414 | if (result != NS_OK) { |
| 415 | result = mInternalState; |
| 416 | } |
| 417 | |
| 418 | return result; |
| 419 | } |
| 420 | |
| 421 | /** |
| 422 | * Stops parsing temporarily. That is, it will prevent the |
| 423 | * parser from building up content model while scripts |
| 424 | * are being loaded (either an external script from a web |
| 425 | * page, or any number of extension content scripts). |
| 426 | */ |
| 427 | NS_IMETHODIMP_(void)void |
| 428 | nsParser::BlockParser() { mBlocked++; } |
| 429 | |
| 430 | /** |
| 431 | * Open up the parser for tokenization, building up content |
| 432 | * model..etc. However, this method does not resume parsing |
| 433 | * automatically. It's the callers' responsibility to restart |
| 434 | * the parsing engine. |
| 435 | */ |
| 436 | NS_IMETHODIMP_(void)void |
| 437 | nsParser::UnblockParser() { |
| 438 | MOZ_DIAGNOSTIC_ASSERT(mBlocked > 0)do { static_assert( mozilla::detail::AssertionConditionType< decltype(mBlocked > 0)>::isValid, "invalid assertion condition" ); if ((__builtin_expect(!!(!(!!(mBlocked > 0))), 0))) { do { } while (false); MOZ_ReportAssertionFailure("mBlocked > 0" , "./../../../parser/htmlparser/nsParser.cpp", 438); AnnotateMozCrashReason ("MOZ_DIAGNOSTIC_ASSERT" "(" "mBlocked > 0" ")"); do { MOZ_CrashSequence (__null, 438); __attribute__((nomerge)) ::abort(); } while (false ); } } while (false); |
| 439 | if (MOZ_LIKELY(mBlocked > 0)(__builtin_expect(!!(mBlocked > 0), 1))) { |
| 440 | mBlocked--; |
| 441 | } |
| 442 | } |
| 443 | |
| 444 | NS_IMETHODIMP_(void)void |
| 445 | nsParser::ContinueInterruptedParsingAsync() { |
| 446 | MOZ_ASSERT(mSink)do { static_assert( mozilla::detail::AssertionConditionType< decltype(mSink)>::isValid, "invalid assertion condition"); if ((__builtin_expect(!!(!(!!(mSink))), 0))) { do { } while ( false); MOZ_ReportAssertionFailure("mSink", "./../../../parser/htmlparser/nsParser.cpp" , 446); AnnotateMozCrashReason("MOZ_ASSERT" "(" "mSink" ")"); do { MOZ_CrashSequence(__null, 446); __attribute__((nomerge) ) ::abort(); } while (false); } } while (false); |
| 447 | if (MOZ_LIKELY(mSink)(__builtin_expect(!!(mSink), 1))) { |
| 448 | mSink->ContinueInterruptedParsingAsync(); |
| 449 | } |
| 450 | } |
| 451 | |
| 452 | /** |
| 453 | * Call this to query whether the parser is enabled or not. |
| 454 | */ |
| 455 | NS_IMETHODIMP_(bool)bool |
| 456 | nsParser::IsParserEnabled() { return !mBlocked; } |
| 457 | |
| 458 | /** |
| 459 | * Call this to query whether the parser thinks it's done with parsing. |
| 460 | */ |
| 461 | NS_IMETHODIMP_(bool)bool |
| 462 | nsParser::IsComplete() { |
| 463 | return !(mFlags & NS_PARSER_FLAG_PENDING_CONTINUE_EVENT0x00000001); |
| 464 | } |
| 465 | |
| 466 | void nsParser::HandleParserContinueEvent(nsParserContinueEvent* ev) { |
| 467 | // Ignore any revoked continue events... |
| 468 | if (mContinueEvent != ev) return; |
| 469 | |
| 470 | mFlags &= ~NS_PARSER_FLAG_PENDING_CONTINUE_EVENT0x00000001; |
| 471 | mContinueEvent = nullptr; |
| 472 | |
| 473 | ContinueInterruptedParsing(); |
| 474 | } |
| 475 | |
| 476 | bool nsParser::IsInsertionPointDefined() { return false; } |
| 477 | |
| 478 | void nsParser::IncrementScriptNestingLevel() {} |
| 479 | |
| 480 | void nsParser::DecrementScriptNestingLevel() {} |
| 481 | |
| 482 | bool nsParser::HasNonzeroScriptNestingLevel() const { return false; } |
| 483 | |
| 484 | bool nsParser::IsScriptCreated() { return false; } |
| 485 | |
| 486 | bool nsParser::IsAboutBlankMode() { return false; } |
| 487 | |
| 488 | /** |
| 489 | * This is the main controlling routine in the parsing process. |
| 490 | * Note that it may get called multiple times for the same scanner, |
| 491 | * since this is a pushed based system, and all the tokens may |
| 492 | * not have been consumed by the scanner during a given invocation |
| 493 | * of this method. |
| 494 | */ |
| 495 | NS_IMETHODIMPnsresult |
| 496 | nsParser::Parse(nsIURI* aURL) { |
| 497 | MOZ_ASSERT(aURL, "Error: Null URL given")do { static_assert( mozilla::detail::AssertionConditionType< decltype(aURL)>::isValid, "invalid assertion condition"); if ((__builtin_expect(!!(!(!!(aURL))), 0))) { do { } while (false ); MOZ_ReportAssertionFailure("aURL" " (" "Error: Null URL given" ")", "./../../../parser/htmlparser/nsParser.cpp", 497); AnnotateMozCrashReason ("MOZ_ASSERT" "(" "aURL" ") (" "Error: Null URL given" ")"); do { MOZ_CrashSequence(__null, 497); __attribute__((nomerge)) :: abort(); } while (false); } } while (false); |
| 498 | |
| 499 | if (mInternalState == NS_ERROR_OUT_OF_MEMORY) { |
| 500 | // Checking NS_ERROR_OUT_OF_MEMORY instead of NS_FAILED |
| 501 | // to avoid introducing unintentional changes to behavior. |
| 502 | return mInternalState; |
| 503 | } |
| 504 | |
| 505 | if (!aURL) { |
| 506 | return NS_ERROR_HTMLPARSER_BADURL; |
| 507 | } |
| 508 | |
| 509 | MOZ_ASSERT(!mParserContext, "We expect mParserContext to be null.")do { static_assert( mozilla::detail::AssertionConditionType< decltype(!mParserContext)>::isValid, "invalid assertion condition" ); if ((__builtin_expect(!!(!(!!(!mParserContext))), 0))) { do { } while (false); MOZ_ReportAssertionFailure("!mParserContext" " (" "We expect mParserContext to be null." ")", "./../../../parser/htmlparser/nsParser.cpp" , 509); AnnotateMozCrashReason("MOZ_ASSERT" "(" "!mParserContext" ") (" "We expect mParserContext to be null." ")"); do { MOZ_CrashSequence (__null, 509); __attribute__((nomerge)) ::abort(); } while (false ); } } while (false); |
| 510 | |
| 511 | mParserContext = MakeUnique<CParserContext>(aURL, mCommand); |
| 512 | |
| 513 | return NS_OK; |
| 514 | } |
| 515 | |
| 516 | /** |
| 517 | * Used by XML fragment parsing below. |
| 518 | * |
| 519 | * @param aSourceBuffer contains a string-full of real content |
| 520 | */ |
| 521 | nsresult nsParser::Parse(const nsAString& aSourceBuffer, bool aLastCall) { |
| 522 | if (mInternalState == NS_ERROR_OUT_OF_MEMORY) { |
| 523 | // Checking NS_ERROR_OUT_OF_MEMORY instead of NS_FAILED |
| 524 | // to avoid introducing unintentional changes to behavior. |
| 525 | return mInternalState; |
| 526 | } |
| 527 | |
| 528 | // Don't bother if we're never going to parse this. |
| 529 | if (mInternalState == NS_ERROR_HTMLPARSER_STOPPARSING) { |
| 530 | return NS_OK; |
| 531 | } |
| 532 | |
| 533 | if (!aLastCall && aSourceBuffer.IsEmpty()) { |
| 534 | // Nothing is being passed to the parser so return |
| 535 | // immediately. mUnusedInput will get processed when |
| 536 | // some data is actually passed in. |
| 537 | // But if this is the last call, make sure to finish up |
| 538 | // stuff correctly. |
| 539 | return NS_OK; |
| 540 | } |
| 541 | |
| 542 | // Maintain a reference to ourselves so we don't go away |
| 543 | // till we're completely done. |
| 544 | nsCOMPtr<nsIParser> kungFuDeathGrip(this); |
| 545 | |
| 546 | if (!mParserContext) { |
| 547 | // Only make a new context if we don't have one. |
| 548 | mParserContext = |
| 549 | MakeUnique<CParserContext>(mUnusedInput, mCommand, aLastCall); |
| 550 | |
| 551 | mUnusedInput.Truncate(); |
| 552 | } else if (aLastCall) { |
| 553 | // Set stream listener state to eOnStop, on the final context - Fix |
| 554 | // 68160, to guarantee DidBuildModel() call - Fix 36148 |
| 555 | mParserContext->mStreamListenerState = eOnStop; |
| 556 | mParserContext->mScanner.SetIncremental(false); |
| 557 | } |
| 558 | |
| 559 | mParserContext->mScanner.Append(aSourceBuffer); |
| 560 | return ResumeParse(false, false, false); |
| 561 | } |
| 562 | |
| 563 | nsresult nsParser::ParseFragment(const nsAString& aSourceBuffer, |
| 564 | nsTArray<nsString>& aTagStack) { |
| 565 | if (mInternalState == NS_ERROR_OUT_OF_MEMORY) { |
| 566 | // Checking NS_ERROR_OUT_OF_MEMORY instead of NS_FAILED |
| 567 | // to avoid introducing unintentional changes to behavior. |
| 568 | return mInternalState; |
| 569 | } |
| 570 | |
| 571 | nsresult result = NS_OK; |
| 572 | nsAutoString theContext; |
| 573 | uint32_t theCount = aTagStack.Length(); |
| 574 | uint32_t theIndex = 0; |
| 575 | |
| 576 | for (theIndex = 0; theIndex < theCount; theIndex++) { |
| 577 | theContext.Append('<'); |
| 578 | theContext.Append(aTagStack[theCount - theIndex - 1]); |
| 579 | theContext.Append('>'); |
| 580 | } |
| 581 | |
| 582 | if (theCount == 0) { |
| 583 | // Ensure that the buffer is not empty. Because none of the DTDs care |
| 584 | // about leading whitespace, this doesn't change the result. |
| 585 | theContext.Assign(' '); |
| 586 | } |
| 587 | |
| 588 | // First, parse the context to build up the DTD's tag stack. Note that we |
| 589 | // pass false for the aLastCall parameter. |
| 590 | result = Parse(theContext, false); |
| 591 | if (NS_FAILED(result)((bool)(__builtin_expect(!!(NS_FAILED_impl(result)), 0)))) { |
| 592 | return result; |
| 593 | } |
| 594 | |
| 595 | if (!mSink) { |
| 596 | // Parse must have failed in the XML case and so the sink was killed. |
| 597 | return NS_ERROR_HTMLPARSER_STOPPARSING; |
| 598 | } |
| 599 | |
| 600 | nsCOMPtr<nsIFragmentContentSink> fragSink = do_QueryInterface(mSink); |
| 601 | NS_ASSERTION(fragSink, "ParseFragment requires a fragment content sink")do { if (!(fragSink)) { NS_DebugBreak(NS_DEBUG_ASSERTION, "ParseFragment requires a fragment content sink" , "fragSink", "./../../../parser/htmlparser/nsParser.cpp", 601 ); MOZ_PretendNoReturn(); } } while (0); |
| 602 | |
| 603 | fragSink->WillBuildContent(); |
| 604 | // Now, parse the actual content. Note that this is the last call |
| 605 | // for HTML content, but for XML, we will want to build and parse |
| 606 | // the end tags. However, if tagStack is empty, it's the last call |
| 607 | // for XML as well. |
| 608 | if (theCount == 0) { |
| 609 | result = Parse(aSourceBuffer, true); |
| 610 | fragSink->DidBuildContent(); |
| 611 | } else { |
| 612 | // Add an end tag chunk, so expat will read the whole source buffer, |
| 613 | // and not worry about ']]' etc. |
| 614 | result = Parse(aSourceBuffer + u"</"_ns, false); |
| 615 | fragSink->DidBuildContent(); |
| 616 | |
| 617 | if (NS_SUCCEEDED(result)((bool)(__builtin_expect(!!(!NS_FAILED_impl(result)), 1)))) { |
| 618 | nsAutoString endContext; |
| 619 | for (theIndex = 0; theIndex < theCount; theIndex++) { |
| 620 | // we already added an end tag chunk above |
| 621 | if (theIndex > 0) { |
| 622 | endContext.AppendLiteral("</"); |
| 623 | } |
| 624 | |
| 625 | nsString& thisTag = aTagStack[theIndex]; |
| 626 | // was there an xmlns=? |
| 627 | int32_t endOfTag = thisTag.FindChar(char16_t(' ')); |
| 628 | if (endOfTag == -1) { |
| 629 | endContext.Append(thisTag); |
| 630 | } else { |
| 631 | endContext.Append(Substring(thisTag, 0, endOfTag)); |
| 632 | } |
| 633 | |
| 634 | endContext.Append('>'); |
| 635 | } |
| 636 | |
| 637 | result = Parse(endContext, true); |
| 638 | } |
| 639 | } |
| 640 | |
| 641 | mParserContext.reset(); |
| 642 | |
| 643 | return result; |
| 644 | } |
| 645 | |
| 646 | /** |
| 647 | * This routine is called to cause the parser to continue parsing its |
| 648 | * underlying stream. This call allows the parse process to happen in |
| 649 | * chunks, such as when the content is push based, and we need to parse in |
| 650 | * pieces. |
| 651 | * |
| 652 | * An interesting change in how the parser gets used has led us to add extra |
| 653 | * processing to this method. The case occurs when the parser is blocked in |
| 654 | * one context, and gets a parse(string) call in another context. In this |
| 655 | * case, the parserContexts are linked. No problem. |
| 656 | * |
| 657 | * The problem is that Parse(string) assumes that it can proceed unabated, |
| 658 | * but if the parser is already blocked that assumption is false. So we |
| 659 | * needed to add a mechanism here to allow the parser to continue to process |
| 660 | * (the pop and free) contexts until 1) it get's blocked again; 2) it runs |
| 661 | * out of contexts. |
| 662 | * |
| 663 | * |
| 664 | * @param allowItertion : set to true if non-script resumption is requested |
| 665 | * @param aIsFinalChunk : tells us when the last chunk of data is provided. |
| 666 | * @return error code -- 0 if ok, non-zero if error. |
| 667 | */ |
| 668 | nsresult nsParser::ResumeParse(bool allowIteration, bool aIsFinalChunk, |
| 669 | bool aCanInterrupt) { |
| 670 | if (mInternalState == NS_ERROR_OUT_OF_MEMORY) { |
| 671 | // Checking NS_ERROR_OUT_OF_MEMORY instead of NS_FAILED |
| 672 | // to avoid introducing unintentional changes to behavior. |
| 673 | return mInternalState; |
| 674 | } |
| 675 | |
| 676 | nsresult result = NS_OK; |
| 677 | |
| 678 | if (!mBlocked && mInternalState != NS_ERROR_HTMLPARSER_STOPPARSING) { |
| 679 | result = WillBuildModel(); |
| 680 | if (NS_FAILED(result)((bool)(__builtin_expect(!!(NS_FAILED_impl(result)), 0)))) { |
| 681 | mFlags &= ~NS_PARSER_FLAG_CAN_TOKENIZE0x00000002; |
| 682 | return result; |
| 683 | } |
| 684 | |
| 685 | if (mExpatDriver) { |
| 686 | mSink->WillResume(); |
| 687 | bool theIterationIsOk = true; |
| 688 | |
| 689 | while (result == NS_OK && theIterationIsOk) { |
| 690 | if (!mUnusedInput.IsEmpty()) { |
| 691 | // -- Ref: Bug# 22485 -- |
| 692 | // Insert the unused input into the source buffer |
| 693 | // as if it was read from the input stream. |
| 694 | // Adding UngetReadable() per vidur!! |
| 695 | mParserContext->mScanner.UngetReadable(mUnusedInput); |
| 696 | mUnusedInput.Truncate(0); |
| 697 | } |
| 698 | |
| 699 | // Only allow parsing to be interrupted in the subsequent call to |
| 700 | // build model. |
| 701 | nsresult theTokenizerResult; |
| 702 | if (mFlags & NS_PARSER_FLAG_CAN_TOKENIZE0x00000002) { |
| 703 | mParserContext->mScanner.Mark(); |
| 704 | if (mParserContext->mDocType == eXML && |
| 705 | mParserContext->mParserCommand != eViewSource) { |
| 706 | theTokenizerResult = mExpatDriver->ResumeParse( |
| 707 | mParserContext->mScanner, aIsFinalChunk); |
| 708 | if (NS_FAILED(theTokenizerResult)((bool)(__builtin_expect(!!(NS_FAILED_impl(theTokenizerResult )), 0)))) { |
| 709 | mParserContext->mScanner.RewindToMark(); |
| 710 | if (NS_ERROR_HTMLPARSER_STOPPARSING == theTokenizerResult) { |
| 711 | theTokenizerResult = Terminate(); |
| 712 | mSink = nullptr; |
| 713 | } |
| 714 | } |
| 715 | } else { |
| 716 | // Nothing to do for non-XML. Note that this should only be |
| 717 | // about:blank at this point, we're also checking for view-source |
| 718 | // above, but that shouldn't end up here anymore. |
| 719 | theTokenizerResult = NS_ERROR_HTMLPARSER_EOF; |
| 720 | } |
| 721 | } else { |
| 722 | theTokenizerResult = NS_OK; |
| 723 | } |
| 724 | |
| 725 | result = mExpatDriver->BuildModel(); |
| 726 | if (result == NS_ERROR_HTMLPARSER_INTERRUPTED && aIsFinalChunk) { |
| 727 | PostContinueEvent(); |
| 728 | } |
| 729 | |
| 730 | theIterationIsOk = theTokenizerResult != NS_ERROR_HTMLPARSER_EOF && |
| 731 | result != NS_ERROR_HTMLPARSER_INTERRUPTED; |
| 732 | |
| 733 | // Make sure not to stop parsing too early. Therefore, before shutting |
| 734 | // down the parser, it's important to check whether the input buffer |
| 735 | // has been scanned to completion (theTokenizerResult should be kEOF). |
| 736 | // kEOF -> End of buffer. |
| 737 | |
| 738 | // If we're told the parser has been blocked, we disable all further |
| 739 | // parsing (and cache any data coming in) until the parser is |
| 740 | // re-enabled. |
| 741 | if (NS_ERROR_HTMLPARSER_BLOCK == result) { |
| 742 | mSink->WillInterrupt(); |
| 743 | return NS_OK; |
| 744 | } |
| 745 | if (NS_ERROR_HTMLPARSER_STOPPARSING == result) { |
| 746 | // Note: Parser Terminate() calls DidBuildModel. |
| 747 | if (mInternalState != NS_ERROR_HTMLPARSER_STOPPARSING) { |
| 748 | DidBuildModel(); |
| 749 | mInternalState = result; |
| 750 | } |
| 751 | |
| 752 | return NS_OK; |
| 753 | } |
| 754 | if (((NS_OK == result && |
| 755 | theTokenizerResult == NS_ERROR_HTMLPARSER_EOF) || |
| 756 | result == NS_ERROR_HTMLPARSER_INTERRUPTED) && |
| 757 | mParserContext->mStreamListenerState == eOnStop) { |
| 758 | DidBuildModel(); |
| 759 | return NS_OK; |
| 760 | } |
| 761 | |
| 762 | if (theTokenizerResult == NS_ERROR_HTMLPARSER_EOF || |
| 763 | result == NS_ERROR_HTMLPARSER_INTERRUPTED) { |
| 764 | result = (result == NS_ERROR_HTMLPARSER_INTERRUPTED) ? NS_OK : result; |
| 765 | mSink->WillInterrupt(); |
| 766 | } |
| 767 | } |
| 768 | } else { |
| 769 | mInternalState = result = NS_ERROR_HTMLPARSER_UNRESOLVEDDTD; |
| 770 | } |
| 771 | } |
| 772 | |
| 773 | return (result == NS_ERROR_HTMLPARSER_INTERRUPTED) ? NS_OK : result; |
| 774 | } |
| 775 | |
| 776 | /******************************************************************* |
| 777 | These methods are used to talk to the netlib system... |
| 778 | *******************************************************************/ |
| 779 | |
| 780 | nsresult nsParser::OnStartRequest(nsIRequest* request) { |
| 781 | if (mInternalState == NS_ERROR_OUT_OF_MEMORY) { |
| 782 | // Checking NS_ERROR_OUT_OF_MEMORY instead of NS_FAILED |
| 783 | // to avoid introducing unintentional changes to behavior. |
| 784 | return mInternalState; |
| 785 | } |
| 786 | |
| 787 | MOZ_ASSERT(eNone == mParserContext->mStreamListenerState,do { static_assert( mozilla::detail::AssertionConditionType< decltype(eNone == mParserContext->mStreamListenerState)> ::isValid, "invalid assertion condition"); if ((__builtin_expect (!!(!(!!(eNone == mParserContext->mStreamListenerState))), 0))) { do { } while (false); MOZ_ReportAssertionFailure("eNone == mParserContext->mStreamListenerState" " (" "Parser's nsIStreamListener API was not setup " "correctly in constructor." ")", "./../../../parser/htmlparser/nsParser.cpp", 789); AnnotateMozCrashReason ("MOZ_ASSERT" "(" "eNone == mParserContext->mStreamListenerState" ") (" "Parser's nsIStreamListener API was not setup " "correctly in constructor." ")"); do { MOZ_CrashSequence(__null, 789); __attribute__((nomerge )) ::abort(); } while (false); } } while (false) |
| 788 | "Parser's nsIStreamListener API was not setup "do { static_assert( mozilla::detail::AssertionConditionType< decltype(eNone == mParserContext->mStreamListenerState)> ::isValid, "invalid assertion condition"); if ((__builtin_expect (!!(!(!!(eNone == mParserContext->mStreamListenerState))), 0))) { do { } while (false); MOZ_ReportAssertionFailure("eNone == mParserContext->mStreamListenerState" " (" "Parser's nsIStreamListener API was not setup " "correctly in constructor." ")", "./../../../parser/htmlparser/nsParser.cpp", 789); AnnotateMozCrashReason ("MOZ_ASSERT" "(" "eNone == mParserContext->mStreamListenerState" ") (" "Parser's nsIStreamListener API was not setup " "correctly in constructor." ")"); do { MOZ_CrashSequence(__null, 789); __attribute__((nomerge )) ::abort(); } while (false); } } while (false) |
| 789 | "correctly in constructor.")do { static_assert( mozilla::detail::AssertionConditionType< decltype(eNone == mParserContext->mStreamListenerState)> ::isValid, "invalid assertion condition"); if ((__builtin_expect (!!(!(!!(eNone == mParserContext->mStreamListenerState))), 0))) { do { } while (false); MOZ_ReportAssertionFailure("eNone == mParserContext->mStreamListenerState" " (" "Parser's nsIStreamListener API was not setup " "correctly in constructor." ")", "./../../../parser/htmlparser/nsParser.cpp", 789); AnnotateMozCrashReason ("MOZ_ASSERT" "(" "eNone == mParserContext->mStreamListenerState" ") (" "Parser's nsIStreamListener API was not setup " "correctly in constructor." ")"); do { MOZ_CrashSequence(__null, 789); __attribute__((nomerge )) ::abort(); } while (false); } } while (false); |
| 790 | |
| 791 | mParserContext->mStreamListenerState = eOnStart; |
| 792 | mParserContext->mAutoDetectStatus = eUnknownDetect; |
| 793 | mParserContext->mRequest = request; |
| 794 | |
| 795 | mExpatDriver = nullptr; |
| 796 | |
| 797 | nsresult rv; |
| 798 | nsAutoCString contentType; |
| 799 | nsCOMPtr<nsIChannel> channel = do_QueryInterface(request); |
| 800 | if (channel) { |
| 801 | rv = channel->GetContentType(contentType); |
| 802 | if (NS_SUCCEEDED(rv)((bool)(__builtin_expect(!!(!NS_FAILED_impl(rv)), 1)))) { |
| 803 | mParserContext->SetMimeType(contentType); |
| 804 | } |
| 805 | } |
| 806 | |
| 807 | rv = NS_OK; |
| 808 | |
| 809 | return rv; |
| 810 | } |
| 811 | |
| 812 | static bool ExtractCharsetFromXmlDeclaration(const unsigned char* aBytes, |
| 813 | int32_t aLen, |
| 814 | nsCString& oCharset) { |
| 815 | // This code is rather pointless to have. Might as well reuse expat as |
| 816 | // seen in nsHtml5StreamParser. -- hsivonen |
| 817 | oCharset.Truncate(); |
| 818 | if ((aLen >= 5) && ('<' == aBytes[0]) && ('?' == aBytes[1]) && |
| 819 | ('x' == aBytes[2]) && ('m' == aBytes[3]) && ('l' == aBytes[4])) { |
| 820 | int32_t i; |
| 821 | bool versionFound = false, encodingFound = false; |
| 822 | for (i = 6; i < aLen && !encodingFound; ++i) { |
| 823 | // end of XML declaration? |
| 824 | if ((((char*)aBytes)[i] == '?') && ((i + 1) < aLen) && |
| 825 | (((char*)aBytes)[i + 1] == '>')) { |
| 826 | break; |
| 827 | } |
| 828 | // Version is required. |
| 829 | if (!versionFound) { |
| 830 | // Want to avoid string comparisons, hence looking for 'n' |
| 831 | // and only if found check the string leading to it. Not |
| 832 | // foolproof, but fast. |
| 833 | // The shortest string allowed before this is (strlen==13): |
| 834 | // <?xml version |
| 835 | if ((((char*)aBytes)[i] == 'n') && (i >= 12) && |
| 836 | (0 == strncmp("versio", (char*)(aBytes + i - 6), 6))) { |
| 837 | // Fast forward through version |
| 838 | char q = 0; |
| 839 | for (++i; i < aLen; ++i) { |
| 840 | char qi = ((char*)aBytes)[i]; |
| 841 | if (qi == '\'' || qi == '"') { |
| 842 | if (q && q == qi) { |
| 843 | // ending quote |
| 844 | versionFound = true; |
| 845 | break; |
| 846 | } else { |
| 847 | // Starting quote |
| 848 | q = qi; |
| 849 | } |
| 850 | } |
| 851 | } |
| 852 | } |
| 853 | } else { |
| 854 | // encoding must follow version |
| 855 | // Want to avoid string comparisons, hence looking for 'g' |
| 856 | // and only if found check the string leading to it. Not |
| 857 | // foolproof, but fast. |
| 858 | // The shortest allowed string before this (strlen==26): |
| 859 | // <?xml version="1" encoding |
| 860 | if ((((char*)aBytes)[i] == 'g') && (i >= 25) && |
| 861 | (0 == strncmp("encodin", (char*)(aBytes + i - 7), 7))) { |
| 862 | int32_t encStart = 0; |
| 863 | char q = 0; |
| 864 | for (++i; i < aLen; ++i) { |
| 865 | char qi = ((char*)aBytes)[i]; |
| 866 | if (qi == '\'' || qi == '"') { |
| 867 | if (q && q == qi) { |
| 868 | int32_t count = i - encStart; |
| 869 | // encoding value is invalid if it is UTF-16 |
| 870 | if (count > 0 && |
| 871 | PL_strncasecmp("UTF-16", (char*)(aBytes + encStart), |
| 872 | count)) { |
| 873 | oCharset.Assign((char*)(aBytes + encStart), count); |
| 874 | } |
| 875 | encodingFound = true; |
| 876 | break; |
| 877 | } else { |
| 878 | encStart = i + 1; |
| 879 | q = qi; |
| 880 | } |
| 881 | } |
| 882 | } |
| 883 | } |
| 884 | } // if (!versionFound) |
| 885 | } // for |
| 886 | } |
| 887 | return !oCharset.IsEmpty(); |
| 888 | } |
| 889 | |
| 890 | inline char GetNextChar(nsACString::const_iterator& aStart, |
| 891 | nsACString::const_iterator& aEnd) { |
| 892 | NS_ASSERTION(aStart != aEnd, "end of buffer")do { if (!(aStart != aEnd)) { NS_DebugBreak(NS_DEBUG_ASSERTION , "end of buffer", "aStart != aEnd", "./../../../parser/htmlparser/nsParser.cpp" , 892); MOZ_PretendNoReturn(); } } while (0); |
| 893 | return (++aStart != aEnd) ? *aStart : '\0'; |
| 894 | } |
| 895 | |
| 896 | typedef struct { |
| 897 | bool mNeedCharsetCheck; |
| 898 | nsParser* mParser; |
| 899 | nsScanner* mScanner; |
| 900 | nsIRequest* mRequest; |
| 901 | } ParserWriteStruct; |
| 902 | |
| 903 | /* |
| 904 | * This function is invoked as a result of a call to a stream's |
| 905 | * ReadSegments() method. It is called for each contiguous buffer |
| 906 | * of data in the underlying stream or pipe. Using ReadSegments |
| 907 | * allows us to avoid copying data to read out of the stream. |
| 908 | */ |
| 909 | static nsresult ParserWriteFunc(nsIInputStream* in, void* closure, |
| 910 | const char* fromRawSegment, uint32_t toOffset, |
| 911 | uint32_t count, uint32_t* writeCount) { |
| 912 | nsresult result; |
| 913 | ParserWriteStruct* pws = static_cast<ParserWriteStruct*>(closure); |
| 914 | const unsigned char* buf = |
| 915 | reinterpret_cast<const unsigned char*>(fromRawSegment); |
| 916 | uint32_t theNumRead = count; |
| 917 | |
| 918 | if (!pws) { |
| 919 | return NS_ERROR_FAILURE; |
| 920 | } |
| 921 | |
| 922 | if (pws->mNeedCharsetCheck) { |
| 923 | pws->mNeedCharsetCheck = false; |
| 924 | int32_t source; |
| 925 | auto preferred = pws->mParser->GetDocumentCharset(source); |
| 926 | |
| 927 | // This code was bogus when I found it. It expects the BOM or the XML |
| 928 | // declaration to be entirely in the first network buffer. -- hsivonen |
| 929 | const Encoding* encoding; |
| 930 | std::tie(encoding, std::ignore) = Encoding::ForBOM(Span(buf, count)); |
| 931 | if (encoding) { |
| 932 | // The decoder will swallow the BOM. The UTF-16 will re-sniff for |
| 933 | // endianness. The value of preferred is now "UTF-8", "UTF-16LE" |
| 934 | // or "UTF-16BE". |
| 935 | preferred = WrapNotNull(encoding); |
| 936 | source = kCharsetFromByteOrderMark; |
| 937 | } else if (source < kCharsetFromChannel) { |
| 938 | nsAutoCString declCharset; |
| 939 | |
| 940 | if (ExtractCharsetFromXmlDeclaration(buf, count, declCharset)) { |
| 941 | encoding = Encoding::ForLabel(declCharset); |
| 942 | if (encoding) { |
| 943 | preferred = WrapNotNull(encoding); |
| 944 | source = kCharsetFromMetaTag; |
| 945 | } |
| 946 | } |
| 947 | } |
| 948 | |
| 949 | pws->mParser->SetDocumentCharset(preferred, source, false); |
| 950 | pws->mParser->SetSinkCharset(preferred); |
| 951 | } |
| 952 | |
| 953 | result = pws->mScanner->Append(fromRawSegment, theNumRead); |
| 954 | if (NS_SUCCEEDED(result)((bool)(__builtin_expect(!!(!NS_FAILED_impl(result)), 1)))) { |
| 955 | *writeCount = count; |
| 956 | } |
| 957 | |
| 958 | return result; |
| 959 | } |
| 960 | |
| 961 | nsresult nsParser::OnDataAvailable(nsIRequest* request, |
| 962 | nsIInputStream* pIStream, |
| 963 | uint64_t sourceOffset, uint32_t aLength) { |
| 964 | if (mInternalState == NS_ERROR_OUT_OF_MEMORY) { |
| 965 | // Checking NS_ERROR_OUT_OF_MEMORY instead of NS_FAILED |
| 966 | // to avoid introducing unintentional changes to behavior. |
| 967 | return mInternalState; |
| 968 | } |
| 969 | |
| 970 | MOZ_ASSERT((eOnStart == mParserContext->mStreamListenerState ||do { static_assert( mozilla::detail::AssertionConditionType< decltype((eOnStart == mParserContext->mStreamListenerState || eOnDataAvail == mParserContext->mStreamListenerState)) >::isValid, "invalid assertion condition"); if ((__builtin_expect (!!(!(!!((eOnStart == mParserContext->mStreamListenerState || eOnDataAvail == mParserContext->mStreamListenerState)) )), 0))) { do { } while (false); MOZ_ReportAssertionFailure("(eOnStart == mParserContext->mStreamListenerState || eOnDataAvail == mParserContext->mStreamListenerState)" " (" "Error: OnStartRequest() must be called before OnDataAvailable()" ")", "./../../../parser/htmlparser/nsParser.cpp", 972); AnnotateMozCrashReason ("MOZ_ASSERT" "(" "(eOnStart == mParserContext->mStreamListenerState || eOnDataAvail == mParserContext->mStreamListenerState)" ") (" "Error: OnStartRequest() must be called before OnDataAvailable()" ")"); do { MOZ_CrashSequence(__null, 972); __attribute__((nomerge )) ::abort(); } while (false); } } while (false) |
| 971 | eOnDataAvail == mParserContext->mStreamListenerState),do { static_assert( mozilla::detail::AssertionConditionType< decltype((eOnStart == mParserContext->mStreamListenerState || eOnDataAvail == mParserContext->mStreamListenerState)) >::isValid, "invalid assertion condition"); if ((__builtin_expect (!!(!(!!((eOnStart == mParserContext->mStreamListenerState || eOnDataAvail == mParserContext->mStreamListenerState)) )), 0))) { do { } while (false); MOZ_ReportAssertionFailure("(eOnStart == mParserContext->mStreamListenerState || eOnDataAvail == mParserContext->mStreamListenerState)" " (" "Error: OnStartRequest() must be called before OnDataAvailable()" ")", "./../../../parser/htmlparser/nsParser.cpp", 972); AnnotateMozCrashReason ("MOZ_ASSERT" "(" "(eOnStart == mParserContext->mStreamListenerState || eOnDataAvail == mParserContext->mStreamListenerState)" ") (" "Error: OnStartRequest() must be called before OnDataAvailable()" ")"); do { MOZ_CrashSequence(__null, 972); __attribute__((nomerge )) ::abort(); } while (false); } } while (false) |
| 972 | "Error: OnStartRequest() must be called before OnDataAvailable()")do { static_assert( mozilla::detail::AssertionConditionType< decltype((eOnStart == mParserContext->mStreamListenerState || eOnDataAvail == mParserContext->mStreamListenerState)) >::isValid, "invalid assertion condition"); if ((__builtin_expect (!!(!(!!((eOnStart == mParserContext->mStreamListenerState || eOnDataAvail == mParserContext->mStreamListenerState)) )), 0))) { do { } while (false); MOZ_ReportAssertionFailure("(eOnStart == mParserContext->mStreamListenerState || eOnDataAvail == mParserContext->mStreamListenerState)" " (" "Error: OnStartRequest() must be called before OnDataAvailable()" ")", "./../../../parser/htmlparser/nsParser.cpp", 972); AnnotateMozCrashReason ("MOZ_ASSERT" "(" "(eOnStart == mParserContext->mStreamListenerState || eOnDataAvail == mParserContext->mStreamListenerState)" ") (" "Error: OnStartRequest() must be called before OnDataAvailable()" ")"); do { MOZ_CrashSequence(__null, 972); __attribute__((nomerge )) ::abort(); } while (false); } } while (false); |
| 973 | MOZ_ASSERT(NS_InputStreamIsBuffered(pIStream),do { static_assert( mozilla::detail::AssertionConditionType< decltype(NS_InputStreamIsBuffered(pIStream))>::isValid, "invalid assertion condition" ); if ((__builtin_expect(!!(!(!!(NS_InputStreamIsBuffered(pIStream )))), 0))) { do { } while (false); MOZ_ReportAssertionFailure ("NS_InputStreamIsBuffered(pIStream)" " (" "Must have a buffered input stream" ")", "./../../../parser/htmlparser/nsParser.cpp", 974); AnnotateMozCrashReason ("MOZ_ASSERT" "(" "NS_InputStreamIsBuffered(pIStream)" ") (" "Must have a buffered input stream" ")"); do { MOZ_CrashSequence(__null, 974); __attribute__((nomerge )) ::abort(); } while (false); } } while (false) |
| 974 | "Must have a buffered input stream")do { static_assert( mozilla::detail::AssertionConditionType< decltype(NS_InputStreamIsBuffered(pIStream))>::isValid, "invalid assertion condition" ); if ((__builtin_expect(!!(!(!!(NS_InputStreamIsBuffered(pIStream )))), 0))) { do { } while (false); MOZ_ReportAssertionFailure ("NS_InputStreamIsBuffered(pIStream)" " (" "Must have a buffered input stream" ")", "./../../../parser/htmlparser/nsParser.cpp", 974); AnnotateMozCrashReason ("MOZ_ASSERT" "(" "NS_InputStreamIsBuffered(pIStream)" ") (" "Must have a buffered input stream" ")"); do { MOZ_CrashSequence(__null, 974); __attribute__((nomerge )) ::abort(); } while (false); } } while (false); |
| 975 | |
| 976 | nsresult rv = NS_OK; |
| 977 | |
| 978 | if (mParserContext->mRequest == request) { |
| 979 | mParserContext->mStreamListenerState = eOnDataAvail; |
| 980 | |
| 981 | uint32_t totalRead; |
| 982 | ParserWriteStruct pws; |
| 983 | pws.mNeedCharsetCheck = true; |
| 984 | pws.mParser = this; |
| 985 | pws.mScanner = &mParserContext->mScanner; |
| 986 | pws.mRequest = request; |
| 987 | |
| 988 | rv = pIStream->ReadSegments(ParserWriteFunc, &pws, aLength, &totalRead); |
| 989 | if (NS_FAILED(rv)((bool)(__builtin_expect(!!(NS_FAILED_impl(rv)), 0)))) { |
| 990 | return rv; |
| 991 | } |
| 992 | |
| 993 | // If there are scripts executing, this is probably due to a synchronous |
| 994 | // XMLHttpRequest, see bug 460706 and 1938290. |
| 995 | if (IsScriptExecuting()) { |
| 996 | ContinueParsingDocumentAfterCurrentScript(); |
| 997 | return rv; |
| 998 | } |
| 999 | |
| 1000 | if (!mProcessingNetworkData) { |
| 1001 | nsCOMPtr<nsIParser> kungFuDeathGrip(this); |
| 1002 | nsCOMPtr<nsIContentSink> sinkDeathGrip(mSink); |
| 1003 | mProcessingNetworkData = true; |
| 1004 | if (sinkDeathGrip) { |
| 1005 | sinkDeathGrip->WillParse(); |
| 1006 | } |
| 1007 | rv = ResumeParse(); |
| 1008 | // Check if someone spun the event loop while we were parsing (XML |
| 1009 | // script...) If so, and OnStop was called during the spin, process it |
| 1010 | // now. |
| 1011 | if ((mParserContext->mRequest == request) && mOnStopPending) { |
| 1012 | mOnStopPending = false; |
| 1013 | mParserContext->mStreamListenerState = eOnStop; |
| 1014 | mParserContext->mScanner.SetIncremental(false); |
| 1015 | |
| 1016 | if (sinkDeathGrip) { |
| 1017 | sinkDeathGrip->WillParse(); |
| 1018 | } |
| 1019 | rv = ResumeParse(true, true); |
| 1020 | } |
| 1021 | mProcessingNetworkData = false; |
| 1022 | } |
| 1023 | } else { |
| 1024 | rv = NS_ERROR_UNEXPECTED; |
| 1025 | } |
| 1026 | |
| 1027 | return rv; |
| 1028 | } |
| 1029 | |
| 1030 | /** |
| 1031 | * This is called by the networking library once the last block of data |
| 1032 | * has been collected from the net. |
| 1033 | */ |
| 1034 | nsresult nsParser::OnStopRequest(nsIRequest* request, nsresult status) { |
| 1035 | if (mInternalState == NS_ERROR_OUT_OF_MEMORY) { |
| 1036 | // Checking NS_ERROR_OUT_OF_MEMORY instead of NS_FAILED |
| 1037 | // to avoid introducing unintentional changes to behavior. |
| 1038 | return mInternalState; |
| 1039 | } |
| 1040 | |
| 1041 | nsresult rv = NS_OK; |
| 1042 | |
| 1043 | mStreamStatus = status; |
| 1044 | |
| 1045 | // If the load was aborted (because we were removed from the DOM tree for |
| 1046 | // instance) we should abort the parser and terminate early. Resuming the |
| 1047 | // parse may trigger synchronous script execution here. |
| 1048 | if (status == NS_BINDING_ABORTED) { |
| 1049 | return Terminate(); |
| 1050 | } |
| 1051 | |
| 1052 | // If there are scripts executing, this is probably due to a synchronous |
| 1053 | // XMLHttpRequest, see bug 460706 and 1938290. |
| 1054 | if (IsScriptExecuting()) { |
| 1055 | // We'll have to handle this later |
| 1056 | mOnStopPending = true; |
| 1057 | ContinueParsingDocumentAfterCurrentScript(); |
| 1058 | return rv; |
| 1059 | } |
| 1060 | |
| 1061 | if (!mProcessingNetworkData && NS_SUCCEEDED(rv)((bool)(__builtin_expect(!!(!NS_FAILED_impl(rv)), 1)))) { |
| 1062 | if (mParserContext->mRequest == request) { |
| 1063 | mParserContext->mStreamListenerState = eOnStop; |
| 1064 | mParserContext->mScanner.SetIncremental(false); |
| 1065 | } |
| 1066 | mProcessingNetworkData = true; |
| 1067 | if (mSink) { |
| 1068 | mSink->WillParse(); |
| 1069 | } |
| 1070 | rv = ResumeParse(true, true); |
| 1071 | mProcessingNetworkData = false; |
| 1072 | } else { |
| 1073 | // We'll have to handle this later |
| 1074 | mOnStopPending = true; |
| 1075 | } |
| 1076 | |
| 1077 | // If the parser isn't enabled, we don't finish parsing till |
| 1078 | // it is reenabled. |
| 1079 | |
| 1080 | return rv; |
| 1081 | } |
| 1082 | |
| 1083 | /** |
| 1084 | * Get this as nsIStreamListener |
| 1085 | */ |
| 1086 | nsIStreamListener* nsParser::GetStreamListener() { return this; } |