File: | var/lib/jenkins/workspace/firefox-scan-build/layout/svg/SVGTextFrame.cpp |
Warning: | line 4751, column 14 Value stored to 'end' during its initialization is never read |
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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 | // Main header first: |
8 | #include "SVGTextFrame.h" |
9 | |
10 | // Keep others in (case-insensitive) order: |
11 | #include "DOMSVGPoint.h" |
12 | #include "gfx2DGlue.h" |
13 | #include "gfxContext.h" |
14 | #include "gfxFont.h" |
15 | #include "gfxSkipChars.h" |
16 | #include "gfxTypes.h" |
17 | #include "gfxUtils.h" |
18 | #include "LookAndFeel.h" |
19 | #include "nsAlgorithm.h" |
20 | #include "nsBidiPresUtils.h" |
21 | #include "nsBlockFrame.h" |
22 | #include "nsCaret.h" |
23 | #include "nsContentUtils.h" |
24 | #include "nsGkAtoms.h" |
25 | #include "SVGPaintServerFrame.h" |
26 | #include "nsTArray.h" |
27 | #include "nsTextFrame.h" |
28 | #include "SVGAnimatedNumberList.h" |
29 | #include "SVGContentUtils.h" |
30 | #include "SVGContextPaint.h" |
31 | #include "SVGLengthList.h" |
32 | #include "SVGNumberList.h" |
33 | #include "nsLayoutUtils.h" |
34 | #include "nsFrameSelection.h" |
35 | #include "nsStyleStructInlines.h" |
36 | #include "mozilla/CaretAssociationHint.h" |
37 | #include "mozilla/DisplaySVGItem.h" |
38 | #include "mozilla/Likely.h" |
39 | #include "mozilla/PresShell.h" |
40 | #include "mozilla/SVGObserverUtils.h" |
41 | #include "mozilla/SVGOuterSVGFrame.h" |
42 | #include "mozilla/SVGUtils.h" |
43 | #include "mozilla/dom/DOMPointBinding.h" |
44 | #include "mozilla/dom/Selection.h" |
45 | #include "mozilla/dom/SVGGeometryElement.h" |
46 | #include "mozilla/dom/SVGRect.h" |
47 | #include "mozilla/dom/SVGTextContentElementBinding.h" |
48 | #include "mozilla/dom/SVGTextPathElement.h" |
49 | #include "mozilla/dom/Text.h" |
50 | #include "mozilla/gfx/2D.h" |
51 | #include "mozilla/gfx/PatternHelpers.h" |
52 | #include <algorithm> |
53 | #include <cmath> |
54 | #include <limits> |
55 | |
56 | using namespace mozilla::dom; |
57 | using namespace mozilla::dom::SVGTextContentElement_Binding; |
58 | using namespace mozilla::gfx; |
59 | using namespace mozilla::image; |
60 | |
61 | namespace mozilla { |
62 | |
63 | // ============================================================================ |
64 | // Utility functions |
65 | |
66 | /** |
67 | * Using the specified gfxSkipCharsIterator, converts an offset and length |
68 | * in original char indexes to skipped char indexes. |
69 | * |
70 | * @param aIterator The gfxSkipCharsIterator to use for the conversion. |
71 | * @param aOriginalOffset The original offset. |
72 | * @param aOriginalLength The original length. |
73 | */ |
74 | static gfxTextRun::Range ConvertOriginalToSkipped( |
75 | gfxSkipCharsIterator& aIterator, uint32_t aOriginalOffset, |
76 | uint32_t aOriginalLength) { |
77 | uint32_t start = aIterator.ConvertOriginalToSkipped(aOriginalOffset); |
78 | aIterator.AdvanceOriginal(aOriginalLength); |
79 | return gfxTextRun::Range(start, aIterator.GetSkippedOffset()); |
80 | } |
81 | |
82 | /** |
83 | * Converts an nsPoint from app units to user space units using the specified |
84 | * nsPresContext and returns it as a gfxPoint. |
85 | */ |
86 | static gfxPoint AppUnitsToGfxUnits(const nsPoint& aPoint, |
87 | const nsPresContext* aContext) { |
88 | return gfxPoint(aContext->AppUnitsToGfxUnits(aPoint.x), |
89 | aContext->AppUnitsToGfxUnits(aPoint.y)); |
90 | } |
91 | |
92 | /** |
93 | * Converts a gfxRect that is in app units to CSS pixels using the specified |
94 | * nsPresContext and returns it as a gfxRect. |
95 | */ |
96 | static gfxRect AppUnitsToFloatCSSPixels(const gfxRect& aRect, |
97 | const nsPresContext* aContext) { |
98 | return gfxRect(nsPresContext::AppUnitsToFloatCSSPixels(aRect.x), |
99 | nsPresContext::AppUnitsToFloatCSSPixels(aRect.y), |
100 | nsPresContext::AppUnitsToFloatCSSPixels(aRect.width), |
101 | nsPresContext::AppUnitsToFloatCSSPixels(aRect.height)); |
102 | } |
103 | |
104 | /** |
105 | * Returns whether a gfxPoint lies within a gfxRect. |
106 | */ |
107 | static bool Inside(const gfxRect& aRect, const gfxPoint& aPoint) { |
108 | return aPoint.x >= aRect.x && aPoint.x < aRect.XMost() && |
109 | aPoint.y >= aRect.y && aPoint.y < aRect.YMost(); |
110 | } |
111 | |
112 | /** |
113 | * Gets the measured ascent and descent of the text in the given nsTextFrame |
114 | * in app units. |
115 | * |
116 | * @param aFrame The text frame. |
117 | * @param aAscent The ascent in app units (output). |
118 | * @param aDescent The descent in app units (output). |
119 | */ |
120 | static void GetAscentAndDescentInAppUnits(nsTextFrame* aFrame, |
121 | gfxFloat& aAscent, |
122 | gfxFloat& aDescent) { |
123 | gfxSkipCharsIterator it = aFrame->EnsureTextRun(nsTextFrame::eInflated); |
124 | gfxTextRun* textRun = aFrame->GetTextRun(nsTextFrame::eInflated); |
125 | |
126 | gfxTextRun::Range range = ConvertOriginalToSkipped( |
127 | it, aFrame->GetContentOffset(), aFrame->GetContentLength()); |
128 | |
129 | textRun->GetLineHeightMetrics(range, aAscent, aDescent); |
130 | } |
131 | |
132 | /** |
133 | * Updates an interval by intersecting it with another interval. |
134 | * The intervals are specified using a start index and a length. |
135 | */ |
136 | static void IntersectInterval(uint32_t& aStart, uint32_t& aLength, |
137 | uint32_t aStartOther, uint32_t aLengthOther) { |
138 | uint32_t aEnd = aStart + aLength; |
139 | uint32_t aEndOther = aStartOther + aLengthOther; |
140 | |
141 | if (aStartOther >= aEnd || aStart >= aEndOther) { |
142 | aLength = 0; |
143 | } else { |
144 | if (aStartOther >= aStart) aStart = aStartOther; |
145 | aLength = std::min(aEnd, aEndOther) - aStart; |
146 | } |
147 | } |
148 | |
149 | /** |
150 | * Intersects an interval as IntersectInterval does but by taking |
151 | * the offset and length of the other interval from a |
152 | * nsTextFrame::TrimmedOffsets object. |
153 | */ |
154 | static void TrimOffsets(uint32_t& aStart, uint32_t& aLength, |
155 | const nsTextFrame::TrimmedOffsets& aTrimmedOffsets) { |
156 | IntersectInterval(aStart, aLength, aTrimmedOffsets.mStart, |
157 | aTrimmedOffsets.mLength); |
158 | } |
159 | |
160 | /** |
161 | * Returns the closest ancestor-or-self node that is not an SVG <a> |
162 | * element. |
163 | */ |
164 | static nsIContent* GetFirstNonAAncestor(nsIContent* aContent) { |
165 | while (aContent && aContent->IsSVGElement(nsGkAtoms::a)) { |
166 | aContent = aContent->GetParent(); |
167 | } |
168 | return aContent; |
169 | } |
170 | |
171 | /** |
172 | * Returns whether the given node is a text content element[1], taking into |
173 | * account whether it has a valid parent. |
174 | * |
175 | * For example, in: |
176 | * |
177 | * <svg xmlns="http://www.w3.org/2000/svg"> |
178 | * <text><a/><text/></text> |
179 | * <tspan/> |
180 | * </svg> |
181 | * |
182 | * true would be returned for the outer <text> element and the <a> element, |
183 | * and false for the inner <text> element (since a <text> is not allowed |
184 | * to be a child of another <text>) and the <tspan> element (because it |
185 | * must be inside a <text> subtree). |
186 | * |
187 | * Note that we don't support the <tref> element yet and this function |
188 | * returns false for it. |
189 | * |
190 | * [1] https://svgwg.org/svg2-draft/intro.html#TermTextContentElement |
191 | */ |
192 | static bool IsTextContentElement(nsIContent* aContent) { |
193 | if (aContent->IsSVGElement(nsGkAtoms::text)) { |
194 | nsIContent* parent = GetFirstNonAAncestor(aContent->GetParent()); |
195 | return !parent || !IsTextContentElement(parent); |
196 | } |
197 | |
198 | if (aContent->IsSVGElement(nsGkAtoms::textPath)) { |
199 | nsIContent* parent = GetFirstNonAAncestor(aContent->GetParent()); |
200 | return parent && parent->IsSVGElement(nsGkAtoms::text); |
201 | } |
202 | |
203 | return aContent->IsAnyOfSVGElements(nsGkAtoms::a, nsGkAtoms::tspan); |
204 | } |
205 | |
206 | /** |
207 | * Returns whether the specified frame is an nsTextFrame that has some text |
208 | * content. |
209 | */ |
210 | static bool IsNonEmptyTextFrame(nsIFrame* aFrame) { |
211 | nsTextFrame* textFrame = do_QueryFrame(aFrame); |
212 | if (!textFrame) { |
213 | return false; |
214 | } |
215 | |
216 | return textFrame->GetContentLength() != 0; |
217 | } |
218 | |
219 | /** |
220 | * Takes an nsIFrame and if it is a text frame that has some text content, |
221 | * returns it as an nsTextFrame and its corresponding Text. |
222 | * |
223 | * @param aFrame The frame to look at. |
224 | * @param aTextFrame aFrame as an nsTextFrame (output). |
225 | * @param aTextNode The Text content of aFrame (output). |
226 | * @return true if aFrame is a non-empty text frame, false otherwise. |
227 | */ |
228 | static bool GetNonEmptyTextFrameAndNode(nsIFrame* aFrame, |
229 | nsTextFrame*& aTextFrame, |
230 | Text*& aTextNode) { |
231 | nsTextFrame* text = do_QueryFrame(aFrame); |
232 | bool isNonEmptyTextFrame = text && text->GetContentLength() != 0; |
233 | |
234 | if (isNonEmptyTextFrame) { |
235 | nsIContent* content = text->GetContent(); |
236 | NS_ASSERTION(content && content->IsText(),do { if (!(content && content->IsText())) { NS_DebugBreak (NS_DEBUG_ASSERTION, "unexpected content type for nsTextFrame" , "content && content->IsText()", "/var/lib/jenkins/workspace/firefox-scan-build/layout/svg/SVGTextFrame.cpp" , 237); MOZ_PretendNoReturn(); } } while (0) |
237 | "unexpected content type for nsTextFrame")do { if (!(content && content->IsText())) { NS_DebugBreak (NS_DEBUG_ASSERTION, "unexpected content type for nsTextFrame" , "content && content->IsText()", "/var/lib/jenkins/workspace/firefox-scan-build/layout/svg/SVGTextFrame.cpp" , 237); MOZ_PretendNoReturn(); } } while (0); |
238 | |
239 | Text* node = content->AsText(); |
240 | MOZ_ASSERT(node->TextLength() != 0,do { static_assert( mozilla::detail::AssertionConditionType< decltype(node->TextLength() != 0)>::isValid, "invalid assertion condition" ); if ((__builtin_expect(!!(!(!!(node->TextLength() != 0)) ), 0))) { do { } while (false); MOZ_ReportAssertionFailure("node->TextLength() != 0" " (" "frame's GetContentLength() should be 0 if the text node " "has no content" ")", "/var/lib/jenkins/workspace/firefox-scan-build/layout/svg/SVGTextFrame.cpp" , 242); AnnotateMozCrashReason("MOZ_ASSERT" "(" "node->TextLength() != 0" ") (" "frame's GetContentLength() should be 0 if the text node " "has no content" ")"); do { *((volatile int*)__null) = 242; __attribute__ ((nomerge)) ::abort(); } while (false); } } while (false) |
241 | "frame's GetContentLength() should be 0 if the text node "do { static_assert( mozilla::detail::AssertionConditionType< decltype(node->TextLength() != 0)>::isValid, "invalid assertion condition" ); if ((__builtin_expect(!!(!(!!(node->TextLength() != 0)) ), 0))) { do { } while (false); MOZ_ReportAssertionFailure("node->TextLength() != 0" " (" "frame's GetContentLength() should be 0 if the text node " "has no content" ")", "/var/lib/jenkins/workspace/firefox-scan-build/layout/svg/SVGTextFrame.cpp" , 242); AnnotateMozCrashReason("MOZ_ASSERT" "(" "node->TextLength() != 0" ") (" "frame's GetContentLength() should be 0 if the text node " "has no content" ")"); do { *((volatile int*)__null) = 242; __attribute__ ((nomerge)) ::abort(); } while (false); } } while (false) |
242 | "has no content")do { static_assert( mozilla::detail::AssertionConditionType< decltype(node->TextLength() != 0)>::isValid, "invalid assertion condition" ); if ((__builtin_expect(!!(!(!!(node->TextLength() != 0)) ), 0))) { do { } while (false); MOZ_ReportAssertionFailure("node->TextLength() != 0" " (" "frame's GetContentLength() should be 0 if the text node " "has no content" ")", "/var/lib/jenkins/workspace/firefox-scan-build/layout/svg/SVGTextFrame.cpp" , 242); AnnotateMozCrashReason("MOZ_ASSERT" "(" "node->TextLength() != 0" ") (" "frame's GetContentLength() should be 0 if the text node " "has no content" ")"); do { *((volatile int*)__null) = 242; __attribute__ ((nomerge)) ::abort(); } while (false); } } while (false); |
243 | |
244 | aTextFrame = text; |
245 | aTextNode = node; |
246 | } |
247 | |
248 | MOZ_ASSERT(IsNonEmptyTextFrame(aFrame) == isNonEmptyTextFrame,do { static_assert( mozilla::detail::AssertionConditionType< decltype(IsNonEmptyTextFrame(aFrame) == isNonEmptyTextFrame)> ::isValid, "invalid assertion condition"); if ((__builtin_expect (!!(!(!!(IsNonEmptyTextFrame(aFrame) == isNonEmptyTextFrame)) ), 0))) { do { } while (false); MOZ_ReportAssertionFailure("IsNonEmptyTextFrame(aFrame) == isNonEmptyTextFrame" " (" "our logic should agree with IsNonEmptyTextFrame" ")", "/var/lib/jenkins/workspace/firefox-scan-build/layout/svg/SVGTextFrame.cpp" , 249); AnnotateMozCrashReason("MOZ_ASSERT" "(" "IsNonEmptyTextFrame(aFrame) == isNonEmptyTextFrame" ") (" "our logic should agree with IsNonEmptyTextFrame" ")") ; do { *((volatile int*)__null) = 249; __attribute__((nomerge )) ::abort(); } while (false); } } while (false) |
249 | "our logic should agree with IsNonEmptyTextFrame")do { static_assert( mozilla::detail::AssertionConditionType< decltype(IsNonEmptyTextFrame(aFrame) == isNonEmptyTextFrame)> ::isValid, "invalid assertion condition"); if ((__builtin_expect (!!(!(!!(IsNonEmptyTextFrame(aFrame) == isNonEmptyTextFrame)) ), 0))) { do { } while (false); MOZ_ReportAssertionFailure("IsNonEmptyTextFrame(aFrame) == isNonEmptyTextFrame" " (" "our logic should agree with IsNonEmptyTextFrame" ")", "/var/lib/jenkins/workspace/firefox-scan-build/layout/svg/SVGTextFrame.cpp" , 249); AnnotateMozCrashReason("MOZ_ASSERT" "(" "IsNonEmptyTextFrame(aFrame) == isNonEmptyTextFrame" ") (" "our logic should agree with IsNonEmptyTextFrame" ")") ; do { *((volatile int*)__null) = 249; __attribute__((nomerge )) ::abort(); } while (false); } } while (false); |
250 | return isNonEmptyTextFrame; |
251 | } |
252 | |
253 | /** |
254 | * Returns whether the specified atom is for one of the five |
255 | * glyph positioning attributes that can appear on SVG text |
256 | * elements -- x, y, dx, dy or rotate. |
257 | */ |
258 | static bool IsGlyphPositioningAttribute(nsAtom* aAttribute) { |
259 | return aAttribute == nsGkAtoms::x || aAttribute == nsGkAtoms::y || |
260 | aAttribute == nsGkAtoms::dx || aAttribute == nsGkAtoms::dy || |
261 | aAttribute == nsGkAtoms::rotate; |
262 | } |
263 | |
264 | /** |
265 | * Returns the position in app units of a given baseline (using an |
266 | * SVG dominant-baseline property value) for a given nsTextFrame. |
267 | * |
268 | * @param aFrame The text frame to inspect. |
269 | * @param aTextRun The text run of aFrame. |
270 | * @param aDominantBaseline The dominant-baseline value to use. |
271 | */ |
272 | static nscoord GetBaselinePosition(nsTextFrame* aFrame, gfxTextRun* aTextRun, |
273 | StyleDominantBaseline aDominantBaseline, |
274 | float aFontSizeScaleFactor) { |
275 | WritingMode writingMode = aFrame->GetWritingMode(); |
276 | gfxFloat ascent, descent; |
277 | aTextRun->GetLineHeightMetrics(ascent, descent); |
278 | |
279 | auto convertIfVerticalRL = [&](gfxFloat dominantBaseline) { |
280 | return writingMode.IsVerticalRL() ? ascent + descent - dominantBaseline |
281 | : dominantBaseline; |
282 | }; |
283 | |
284 | switch (aDominantBaseline) { |
285 | case StyleDominantBaseline::Hanging: |
286 | return convertIfVerticalRL(ascent * 0.2); |
287 | case StyleDominantBaseline::TextBeforeEdge: |
288 | return convertIfVerticalRL(0); |
289 | |
290 | case StyleDominantBaseline::Alphabetic: |
291 | return writingMode.IsVerticalRL() |
292 | ? ascent * 0.5 |
293 | : aFrame->GetLogicalBaseline(writingMode); |
294 | |
295 | case StyleDominantBaseline::Auto: |
296 | return convertIfVerticalRL(aFrame->GetLogicalBaseline(writingMode)); |
297 | |
298 | case StyleDominantBaseline::Middle: |
299 | return convertIfVerticalRL(aFrame->GetLogicalBaseline(writingMode) - |
300 | SVGContentUtils::GetFontXHeight(aFrame) / 2.0 * |
301 | AppUnitsPerCSSPixel() * |
302 | aFontSizeScaleFactor); |
303 | |
304 | case StyleDominantBaseline::TextAfterEdge: |
305 | case StyleDominantBaseline::Ideographic: |
306 | return writingMode.IsVerticalLR() ? 0 : ascent + descent; |
307 | |
308 | case StyleDominantBaseline::Central: |
309 | return (ascent + descent) / 2.0; |
310 | case StyleDominantBaseline::Mathematical: |
311 | return convertIfVerticalRL(ascent / 2.0); |
312 | } |
313 | |
314 | MOZ_ASSERT_UNREACHABLE("unexpected dominant-baseline value")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: " "unexpected dominant-baseline value" ")", "/var/lib/jenkins/workspace/firefox-scan-build/layout/svg/SVGTextFrame.cpp" , 314); AnnotateMozCrashReason("MOZ_ASSERT" "(" "false" ") (" "MOZ_ASSERT_UNREACHABLE: " "unexpected dominant-baseline value" ")"); do { *((volatile int*)__null) = 314; __attribute__((nomerge )) ::abort(); } while (false); } } while (false); |
315 | return convertIfVerticalRL(aFrame->GetLogicalBaseline(writingMode)); |
316 | } |
317 | |
318 | /** |
319 | * Truncates an array to be at most the length of another array. |
320 | * |
321 | * @param aArrayToTruncate The array to truncate. |
322 | * @param aReferenceArray The array whose length will be used to truncate |
323 | * aArrayToTruncate to. |
324 | */ |
325 | template <typename T, typename U> |
326 | static void TruncateTo(nsTArray<T>& aArrayToTruncate, |
327 | const nsTArray<U>& aReferenceArray) { |
328 | uint32_t length = aReferenceArray.Length(); |
329 | if (aArrayToTruncate.Length() > length) { |
330 | aArrayToTruncate.TruncateLength(length); |
331 | } |
332 | } |
333 | |
334 | /** |
335 | * Asserts that the anonymous block child of the SVGTextFrame has been |
336 | * reflowed (or does not exist). Returns null if the child has not been |
337 | * reflowed, and the frame otherwise. |
338 | * |
339 | * We check whether the kid has been reflowed and not the frame itself |
340 | * since we sometimes need to call this function during reflow, after the |
341 | * kid has been reflowed but before we have cleared the dirty bits on the |
342 | * frame itself. |
343 | */ |
344 | static SVGTextFrame* FrameIfAnonymousChildReflowed(SVGTextFrame* aFrame) { |
345 | MOZ_ASSERT(aFrame, "aFrame must not be null")do { static_assert( mozilla::detail::AssertionConditionType< decltype(aFrame)>::isValid, "invalid assertion condition") ; if ((__builtin_expect(!!(!(!!(aFrame))), 0))) { do { } while (false); MOZ_ReportAssertionFailure("aFrame" " (" "aFrame must not be null" ")", "/var/lib/jenkins/workspace/firefox-scan-build/layout/svg/SVGTextFrame.cpp" , 345); AnnotateMozCrashReason("MOZ_ASSERT" "(" "aFrame" ") (" "aFrame must not be null" ")"); do { *((volatile int*)__null ) = 345; __attribute__((nomerge)) ::abort(); } while (false); } } while (false); |
346 | nsIFrame* kid = aFrame->PrincipalChildList().FirstChild(); |
347 | if (kid->IsSubtreeDirty()) { |
348 | MOZ_ASSERT(false, "should have already reflowed the anonymous block child")do { static_assert( mozilla::detail::AssertionConditionType< decltype(false)>::isValid, "invalid assertion condition"); if ((__builtin_expect(!!(!(!!(false))), 0))) { do { } while ( false); MOZ_ReportAssertionFailure("false" " (" "should have already reflowed the anonymous block child" ")", "/var/lib/jenkins/workspace/firefox-scan-build/layout/svg/SVGTextFrame.cpp" , 348); AnnotateMozCrashReason("MOZ_ASSERT" "(" "false" ") (" "should have already reflowed the anonymous block child" ")" ); do { *((volatile int*)__null) = 348; __attribute__((nomerge )) ::abort(); } while (false); } } while (false); |
349 | return nullptr; |
350 | } |
351 | return aFrame; |
352 | } |
353 | |
354 | // FIXME(emilio): SVG is a special-case where transforms affect layout. We don't |
355 | // want that to go outside the SVG stuff (and really we should aim to remove |
356 | // that). |
357 | static float GetContextScale(SVGTextFrame* aFrame) { |
358 | if (aFrame->HasAnyStateBits(NS_FRAME_IS_NONDISPLAY)) { |
359 | // When we are non-display, we could be painted in different coordinate |
360 | // spaces, and we don't want to have to reflow for each of these. We just |
361 | // assume that the context scale is 1.0 for them all, so we don't get stuck |
362 | // with a font size scale factor based on whichever referencing frame |
363 | // happens to reflow first. |
364 | return 1.0f; |
365 | } |
366 | auto matrix = nsLayoutUtils::GetTransformToAncestor( |
367 | RelativeTo{aFrame}, RelativeTo{SVGUtils::GetOuterSVGFrame(aFrame)}); |
368 | Matrix transform2D; |
369 | if (!matrix.CanDraw2D(&transform2D)) { |
370 | return 1.0f; |
371 | } |
372 | auto scales = transform2D.ScaleFactors(); |
373 | return std::max(0.0f, std::max(scales.xScale, scales.yScale)); |
374 | } |
375 | |
376 | // ============================================================================ |
377 | // Utility classes |
378 | |
379 | // ---------------------------------------------------------------------------- |
380 | // TextRenderedRun |
381 | |
382 | /** |
383 | * A run of text within a single nsTextFrame whose glyphs can all be painted |
384 | * with a single call to nsTextFrame::PaintText. A text rendered run can |
385 | * be created for a sequence of two or more consecutive glyphs as long as: |
386 | * |
387 | * - Only the first glyph has (or none of the glyphs have) been positioned |
388 | * with SVG text positioning attributes |
389 | * - All of the glyphs have zero rotation |
390 | * - The glyphs are not on a text path |
391 | * - The glyphs correspond to content within the one nsTextFrame |
392 | * |
393 | * A TextRenderedRunIterator produces TextRenderedRuns required for painting a |
394 | * whole SVGTextFrame. |
395 | */ |
396 | struct TextRenderedRun { |
397 | using Range = gfxTextRun::Range; |
398 | |
399 | /** |
400 | * Constructs a TextRenderedRun that is uninitialized except for mFrame |
401 | * being null. |
402 | */ |
403 | TextRenderedRun() : mFrame(nullptr) {} |
404 | |
405 | /** |
406 | * Constructs a TextRenderedRun with all of the information required to |
407 | * paint it. See the comments documenting the member variables below |
408 | * for descriptions of the arguments. |
409 | */ |
410 | TextRenderedRun(nsTextFrame* aFrame, const gfxPoint& aPosition, |
411 | float aLengthAdjustScaleFactor, double aRotate, |
412 | float aFontSizeScaleFactor, nscoord aBaseline, |
413 | uint32_t aTextFrameContentOffset, |
414 | uint32_t aTextFrameContentLength, |
415 | uint32_t aTextElementCharIndex) |
416 | : mFrame(aFrame), |
417 | mPosition(aPosition), |
418 | mLengthAdjustScaleFactor(aLengthAdjustScaleFactor), |
419 | mRotate(static_cast<float>(aRotate)), |
420 | mFontSizeScaleFactor(aFontSizeScaleFactor), |
421 | mBaseline(aBaseline), |
422 | mTextFrameContentOffset(aTextFrameContentOffset), |
423 | mTextFrameContentLength(aTextFrameContentLength), |
424 | mTextElementCharIndex(aTextElementCharIndex) {} |
425 | |
426 | /** |
427 | * Returns the text run for the text frame that this rendered run is part of. |
428 | */ |
429 | gfxTextRun* GetTextRun() const { |
430 | mFrame->EnsureTextRun(nsTextFrame::eInflated); |
431 | return mFrame->GetTextRun(nsTextFrame::eInflated); |
432 | } |
433 | |
434 | /** |
435 | * Returns whether this rendered run is RTL. |
436 | */ |
437 | bool IsRightToLeft() const { return GetTextRun()->IsRightToLeft(); } |
438 | |
439 | /** |
440 | * Returns whether this rendered run is vertical. |
441 | */ |
442 | bool IsVertical() const { return GetTextRun()->IsVertical(); } |
443 | |
444 | /** |
445 | * Returns the transform that converts from a <text> element's user space into |
446 | * the coordinate space that rendered runs can be painted directly in. |
447 | * |
448 | * The difference between this method and |
449 | * GetTransformFromRunUserSpaceToUserSpace is that when calling in to |
450 | * nsTextFrame::PaintText, it will already take into account any left clip |
451 | * edge (that is, it doesn't just apply a visual clip to the rendered text, it |
452 | * shifts the glyphs over so that they are painted with their left edge at the |
453 | * x coordinate passed in to it). Thus we need to account for this in our |
454 | * transform. |
455 | * |
456 | * |
457 | * Assume that we have: |
458 | * |
459 | * <text x="100" y="100" rotate="0 0 1 0 0 * 1">abcdef</text>. |
460 | * |
461 | * This would result in four text rendered runs: |
462 | * |
463 | * - one for "ab" |
464 | * - one for "c" |
465 | * - one for "de" |
466 | * - one for "f" |
467 | * |
468 | * Assume now that we are painting the third TextRenderedRun. It will have |
469 | * a left clip edge that is the sum of the advances of "abc", and it will |
470 | * have a right clip edge that is the advance of "f". In |
471 | * SVGTextFrame::PaintSVG(), we pass in nsPoint() (i.e., the origin) |
472 | * as the point at which to paint the text frame, and we pass in the |
473 | * clip edge values. The nsTextFrame will paint the substring of its |
474 | * text such that the top-left corner of the "d"'s glyph cell will be at |
475 | * (0, 0) in the current coordinate system. |
476 | * |
477 | * Thus, GetTransformFromUserSpaceForPainting must return a transform from |
478 | * whatever user space the <text> element is in to a coordinate space in |
479 | * device pixels (as that's what nsTextFrame works in) where the origin is at |
480 | * the same position as our user space mPositions[i].mPosition value for |
481 | * the "d" glyph, which will be (100 + userSpaceAdvance("abc"), 100). |
482 | * The translation required to do this (ignoring the scale to get from |
483 | * user space to device pixels, and ignoring the |
484 | * (100 + userSpaceAdvance("abc"), 100) translation) is: |
485 | * |
486 | * (-leftEdge, -baseline) |
487 | * |
488 | * where baseline is the distance between the baseline of the text and the top |
489 | * edge of the nsTextFrame. We translate by -leftEdge horizontally because |
490 | * the nsTextFrame will already shift the glyphs over by that amount and start |
491 | * painting glyphs at x = 0. We translate by -baseline vertically so that |
492 | * painting the top edges of the glyphs at y = 0 will result in their |
493 | * baselines being at our desired y position. |
494 | * |
495 | * |
496 | * Now for an example with RTL text. Assume our content is now |
497 | * <text x="100" y="100" rotate="0 0 1 0 0 1">WERBEH</text>. We'd have |
498 | * the following text rendered runs: |
499 | * |
500 | * - one for "EH" |
501 | * - one for "B" |
502 | * - one for "ER" |
503 | * - one for "W" |
504 | * |
505 | * Again, we are painting the third TextRenderedRun. The left clip edge |
506 | * is the advance of the "W" and the right clip edge is the sum of the |
507 | * advances of "BEH". Our translation to get the rendered "ER" glyphs |
508 | * in the right place this time is: |
509 | * |
510 | * (-frameWidth + rightEdge, -baseline) |
511 | * |
512 | * which is equivalent to: |
513 | * |
514 | * (-(leftEdge + advance("ER")), -baseline) |
515 | * |
516 | * The reason we have to shift left additionally by the width of the run |
517 | * of glyphs we are painting is that although the nsTextFrame is RTL, |
518 | * we still supply the top-left corner to paint the frame at when calling |
519 | * nsTextFrame::PaintText, even though our user space positions for each |
520 | * glyph in mPositions specifies the origin of each glyph, which for RTL |
521 | * glyphs is at the right edge of the glyph cell. |
522 | * |
523 | * |
524 | * For any other use of an nsTextFrame in the context of a particular run |
525 | * (such as hit testing, or getting its rectangle), |
526 | * GetTransformFromRunUserSpaceToUserSpace should be used. |
527 | * |
528 | * @param aContext The context to use for unit conversions. |
529 | */ |
530 | gfxMatrix GetTransformFromUserSpaceForPainting( |
531 | nsPresContext* aContext, const nscoord aVisIStartEdge, |
532 | const nscoord aVisIEndEdge) const; |
533 | |
534 | /** |
535 | * Returns the transform that converts from "run user space" to a <text> |
536 | * element's user space. Run user space is a coordinate system that has the |
537 | * same size as the <text>'s user space but rotated and translated such that |
538 | * (0,0) is the top-left of the rectangle that bounds the text. |
539 | * |
540 | * @param aContext The context to use for unit conversions. |
541 | */ |
542 | gfxMatrix GetTransformFromRunUserSpaceToUserSpace( |
543 | nsPresContext* aContext) const; |
544 | |
545 | /** |
546 | * Returns the transform that converts from "run user space" to float pixels |
547 | * relative to the nsTextFrame that this rendered run is a part of. |
548 | * |
549 | * @param aContext The context to use for unit conversions. |
550 | */ |
551 | gfxMatrix GetTransformFromRunUserSpaceToFrameUserSpace( |
552 | nsPresContext* aContext) const; |
553 | |
554 | /** |
555 | * Flag values used for the aFlags arguments of GetRunUserSpaceRect, |
556 | * GetFrameUserSpaceRect and GetUserSpaceRect. |
557 | */ |
558 | enum { |
559 | // Includes the fill geometry of the text in the returned rectangle. |
560 | eIncludeFill = 1, |
561 | // Includes the stroke geometry of the text in the returned rectangle. |
562 | eIncludeStroke = 2, |
563 | // Don't include any horizontal glyph overflow in the returned rectangle. |
564 | eNoHorizontalOverflow = 4 |
565 | }; |
566 | |
567 | /** |
568 | * Returns a rectangle that bounds the fill and/or stroke of the rendered run |
569 | * in run user space. |
570 | * |
571 | * @param aContext The context to use for unit conversions. |
572 | * @param aFlags A combination of the flags above (eIncludeFill and |
573 | * eIncludeStroke) indicating what parts of the text to include in |
574 | * the rectangle. |
575 | */ |
576 | SVGBBox GetRunUserSpaceRect(nsPresContext* aContext, uint32_t aFlags) const; |
577 | |
578 | /** |
579 | * Returns a rectangle that covers the fill and/or stroke of the rendered run |
580 | * in "frame user space". |
581 | * |
582 | * Frame user space is a coordinate space of the same scale as the <text> |
583 | * element's user space, but with its rotation set to the rotation of |
584 | * the glyphs within this rendered run and its origin set to the position |
585 | * such that placing the nsTextFrame there would result in the glyphs in |
586 | * this rendered run being at their correct positions. |
587 | * |
588 | * For example, say we have <text x="100 150" y="100">ab</text>. Assume |
589 | * the advance of both the "a" and the "b" is 12 user units, and the |
590 | * ascent of the text is 8 user units and its descent is 6 user units, |
591 | * and that we are not measuing the stroke of the text, so that we stay |
592 | * entirely within the glyph cells. |
593 | * |
594 | * There will be two text rendered runs, one for "a" and one for "b". |
595 | * |
596 | * The frame user space for the "a" run will have its origin at |
597 | * (100, 100 - 8) in the <text> element's user space and will have its |
598 | * axes aligned with the user space (since there is no rotate="" or |
599 | * text path involve) and with its scale the same as the user space. |
600 | * The rect returned by this method will be (0, 0, 12, 14), since the "a" |
601 | * glyph is right at the left of the nsTextFrame. |
602 | * |
603 | * The frame user space for the "b" run will have its origin at |
604 | * (150 - 12, 100 - 8), and scale/rotation the same as above. The rect |
605 | * returned by this method will be (12, 0, 12, 14), since we are |
606 | * advance("a") horizontally in to the text frame. |
607 | * |
608 | * @param aContext The context to use for unit conversions. |
609 | * @param aFlags A combination of the flags above (eIncludeFill and |
610 | * eIncludeStroke) indicating what parts of the text to include in |
611 | * the rectangle. |
612 | */ |
613 | SVGBBox GetFrameUserSpaceRect(nsPresContext* aContext, uint32_t aFlags) const; |
614 | |
615 | /** |
616 | * Returns a rectangle that covers the fill and/or stroke of the rendered run |
617 | * in the <text> element's user space. |
618 | * |
619 | * @param aContext The context to use for unit conversions. |
620 | * @param aFlags A combination of the flags above indicating what parts of |
621 | * the text to include in the rectangle. |
622 | * @param aAdditionalTransform An additional transform to apply to the |
623 | * frame user space rectangle before its bounds are transformed into |
624 | * user space. |
625 | */ |
626 | SVGBBox GetUserSpaceRect( |
627 | nsPresContext* aContext, uint32_t aFlags, |
628 | const gfxMatrix* aAdditionalTransform = nullptr) const; |
629 | |
630 | /** |
631 | * Gets the app unit amounts to clip from the left and right edges of |
632 | * the nsTextFrame in order to paint just this rendered run. |
633 | * |
634 | * Note that if clip edge amounts land in the middle of a glyph, the |
635 | * glyph won't be painted at all. The clip edges are thus more of |
636 | * a selection mechanism for which glyphs will be painted, rather |
637 | * than a geometric clip. |
638 | */ |
639 | void GetClipEdges(nscoord& aVisIStartEdge, nscoord& aVisIEndEdge) const; |
640 | |
641 | /** |
642 | * Returns the advance width of the whole rendered run. |
643 | */ |
644 | nscoord GetAdvanceWidth() const; |
645 | |
646 | /** |
647 | * Returns the index of the character into this rendered run whose |
648 | * glyph cell contains the given point, or -1 if there is no such |
649 | * character. This does not hit test against any overflow. |
650 | * |
651 | * @param aContext The context to use for unit conversions. |
652 | * @param aPoint The point in the user space of the <text> element. |
653 | */ |
654 | int32_t GetCharNumAtPosition(nsPresContext* aContext, |
655 | const gfxPoint& aPoint) const; |
656 | |
657 | /** |
658 | * The text frame that this rendered run lies within. |
659 | */ |
660 | nsTextFrame* mFrame; |
661 | |
662 | /** |
663 | * The point in user space that the text is positioned at. |
664 | * |
665 | * For a horizontal run: |
666 | * The x coordinate is the left edge of a LTR run of text or the right edge of |
667 | * an RTL run. The y coordinate is the baseline of the text. |
668 | * For a vertical run: |
669 | * The x coordinate is the baseline of the text. |
670 | * The y coordinate is the top edge of a LTR run, or bottom of RTL. |
671 | */ |
672 | gfxPoint mPosition; |
673 | |
674 | /** |
675 | * The horizontal scale factor to apply when painting glyphs to take |
676 | * into account textLength="". |
677 | */ |
678 | float mLengthAdjustScaleFactor; |
679 | |
680 | /** |
681 | * The rotation in radians in the user coordinate system that the text has. |
682 | */ |
683 | float mRotate; |
684 | |
685 | /** |
686 | * The scale factor that was used to transform the text run's original font |
687 | * size into a sane range for painting and measurement. |
688 | */ |
689 | double mFontSizeScaleFactor; |
690 | |
691 | /** |
692 | * The baseline in app units of this text run. The measurement is from the |
693 | * top of the text frame. (From the left edge if vertical.) |
694 | */ |
695 | nscoord mBaseline; |
696 | |
697 | /** |
698 | * The offset and length in mFrame's content Text that corresponds to |
699 | * this text rendered run. These are original char indexes. |
700 | */ |
701 | uint32_t mTextFrameContentOffset; |
702 | uint32_t mTextFrameContentLength; |
703 | |
704 | /** |
705 | * The character index in the whole SVG <text> element that this text rendered |
706 | * run begins at. |
707 | */ |
708 | uint32_t mTextElementCharIndex; |
709 | }; |
710 | |
711 | gfxMatrix TextRenderedRun::GetTransformFromUserSpaceForPainting( |
712 | nsPresContext* aContext, const nscoord aVisIStartEdge, |
713 | const nscoord aVisIEndEdge) const { |
714 | // We transform to device pixels positioned such that painting the text frame |
715 | // at (0,0) with aItem will result in the text being in the right place. |
716 | |
717 | gfxMatrix m; |
718 | if (!mFrame) { |
719 | return m; |
720 | } |
721 | |
722 | float cssPxPerDevPx = |
723 | nsPresContext::AppUnitsToFloatCSSPixels(aContext->AppUnitsPerDevPixel()); |
724 | |
725 | // Glyph position in user space. |
726 | m.PreTranslate(mPosition / cssPxPerDevPx); |
727 | |
728 | // Take into account any font size scaling and scaling due to textLength="". |
729 | m.PreScale(1.0 / mFontSizeScaleFactor, 1.0 / mFontSizeScaleFactor); |
730 | |
731 | // Rotation due to rotate="" or a <textPath>. |
732 | m.PreRotate(mRotate); |
733 | |
734 | // Scale for textLength="" and translate to get the text frame |
735 | // to the right place. |
736 | nsPoint t; |
737 | if (IsVertical()) { |
738 | m.PreScale(1.0, mLengthAdjustScaleFactor); |
739 | t = nsPoint(-mBaseline, IsRightToLeft() |
740 | ? -mFrame->GetRect().height + aVisIEndEdge |
741 | : -aVisIStartEdge); |
742 | } else { |
743 | m.PreScale(mLengthAdjustScaleFactor, 1.0); |
744 | t = nsPoint(IsRightToLeft() ? -mFrame->GetRect().width + aVisIEndEdge |
745 | : -aVisIStartEdge, |
746 | -mBaseline); |
747 | } |
748 | m.PreTranslate(AppUnitsToGfxUnits(t, aContext)); |
749 | |
750 | return m; |
751 | } |
752 | |
753 | gfxMatrix TextRenderedRun::GetTransformFromRunUserSpaceToUserSpace( |
754 | nsPresContext* aContext) const { |
755 | gfxMatrix m; |
756 | if (!mFrame) { |
757 | return m; |
758 | } |
759 | |
760 | float cssPxPerDevPx = |
761 | nsPresContext::AppUnitsToFloatCSSPixels(aContext->AppUnitsPerDevPixel()); |
762 | |
763 | nscoord start, end; |
764 | GetClipEdges(start, end); |
765 | |
766 | // Glyph position in user space. |
767 | m.PreTranslate(mPosition); |
768 | |
769 | // Rotation due to rotate="" or a <textPath>. |
770 | m.PreRotate(mRotate); |
771 | |
772 | // Scale for textLength="" and translate to get the text frame |
773 | // to the right place. |
774 | |
775 | nsPoint t; |
776 | if (IsVertical()) { |
777 | m.PreScale(1.0, mLengthAdjustScaleFactor); |
778 | t = nsPoint(-mBaseline, |
779 | IsRightToLeft() ? -mFrame->GetRect().height + start + end : 0); |
780 | } else { |
781 | m.PreScale(mLengthAdjustScaleFactor, 1.0); |
782 | t = nsPoint(IsRightToLeft() ? -mFrame->GetRect().width + start + end : 0, |
783 | -mBaseline); |
784 | } |
785 | m.PreTranslate(AppUnitsToGfxUnits(t, aContext) * cssPxPerDevPx / |
786 | mFontSizeScaleFactor); |
787 | |
788 | return m; |
789 | } |
790 | |
791 | gfxMatrix TextRenderedRun::GetTransformFromRunUserSpaceToFrameUserSpace( |
792 | nsPresContext* aContext) const { |
793 | gfxMatrix m; |
794 | if (!mFrame) { |
795 | return m; |
796 | } |
797 | |
798 | nscoord start, end; |
799 | GetClipEdges(start, end); |
800 | |
801 | // Translate by the horizontal distance into the text frame this |
802 | // rendered run is. |
803 | gfxFloat appPerCssPx = AppUnitsPerCSSPixel(); |
804 | gfxPoint t = IsVertical() ? gfxPoint(0, start / appPerCssPx) |
805 | : gfxPoint(start / appPerCssPx, 0); |
806 | return m.PreTranslate(t); |
807 | } |
808 | |
809 | SVGBBox TextRenderedRun::GetRunUserSpaceRect(nsPresContext* aContext, |
810 | uint32_t aFlags) const { |
811 | SVGBBox r; |
812 | if (!mFrame) { |
813 | return r; |
814 | } |
815 | |
816 | // Determine the amount of overflow around frame's mRect. |
817 | // |
818 | // We need to call InkOverflowRectRelativeToSelf because this includes |
819 | // overflowing decorations, which the MeasureText call below does not. |
820 | nsRect self = mFrame->InkOverflowRectRelativeToSelf(); |
821 | nsRect rect = mFrame->GetRect(); |
822 | bool vertical = IsVertical(); |
823 | nsMargin inkOverflow( |
824 | vertical ? -self.x : -self.y, |
825 | vertical ? self.YMost() - rect.height : self.XMost() - rect.width, |
826 | vertical ? self.XMost() - rect.width : self.YMost() - rect.height, |
827 | vertical ? -self.y : -self.x); |
828 | |
829 | gfxSkipCharsIterator it = mFrame->EnsureTextRun(nsTextFrame::eInflated); |
830 | gfxSkipCharsIterator start = it; |
831 | gfxTextRun* textRun = mFrame->GetTextRun(nsTextFrame::eInflated); |
832 | |
833 | // Get the content range for this rendered run. |
834 | Range range = ConvertOriginalToSkipped(it, mTextFrameContentOffset, |
835 | mTextFrameContentLength); |
836 | if (range.Length() == 0) { |
837 | return r; |
838 | } |
839 | |
840 | // FIXME(heycam): We could create a single PropertyProvider for all |
841 | // TextRenderedRuns that correspond to the text frame, rather than recreate |
842 | // it each time here. |
843 | nsTextFrame::PropertyProvider provider(mFrame, start); |
844 | |
845 | // Measure that range. |
846 | gfxTextRun::Metrics metrics = textRun->MeasureText( |
847 | range, gfxFont::LOOSE_INK_EXTENTS, nullptr, &provider); |
848 | // Make sure it includes the font-box. |
849 | gfxRect fontBox(0, -metrics.mAscent, metrics.mAdvanceWidth, |
850 | metrics.mAscent + metrics.mDescent); |
851 | metrics.mBoundingBox.UnionRect(metrics.mBoundingBox, fontBox); |
852 | |
853 | // Determine the rectangle that covers the rendered run's fill, |
854 | // taking into account the measured overflow due to decorations. |
855 | nscoord baseline = |
856 | NSToCoordRoundWithClamp(metrics.mBoundingBox.y + metrics.mAscent); |
857 | gfxFloat x, width; |
858 | if (aFlags & eNoHorizontalOverflow) { |
859 | x = 0.0; |
860 | width = textRun->GetAdvanceWidth(range, &provider); |
861 | if (width < 0.0) { |
862 | x = width; |
863 | width = -width; |
864 | } |
865 | } else { |
866 | x = metrics.mBoundingBox.x; |
867 | width = metrics.mBoundingBox.width; |
868 | } |
869 | nsRect fillInAppUnits(NSToCoordRoundWithClamp(x), baseline, |
870 | NSToCoordRoundWithClamp(width), |
871 | NSToCoordRoundWithClamp(metrics.mBoundingBox.height)); |
872 | fillInAppUnits.Inflate(inkOverflow); |
873 | if (textRun->IsVertical()) { |
874 | // Swap line-relative textMetrics dimensions to physical coordinates. |
875 | std::swap(fillInAppUnits.x, fillInAppUnits.y); |
876 | std::swap(fillInAppUnits.width, fillInAppUnits.height); |
877 | } |
878 | |
879 | // Convert the app units rectangle to user units. |
880 | gfxRect fill = AppUnitsToFloatCSSPixels( |
881 | gfxRect(fillInAppUnits.x, fillInAppUnits.y, fillInAppUnits.width, |
882 | fillInAppUnits.height), |
883 | aContext); |
884 | |
885 | // Scale the rectangle up due to any mFontSizeScaleFactor. |
886 | fill.Scale(1.0 / mFontSizeScaleFactor); |
887 | |
888 | // Include the fill if requested. |
889 | if (aFlags & eIncludeFill) { |
890 | r = fill; |
891 | } |
892 | |
893 | // Include the stroke if requested. |
894 | if ((aFlags & eIncludeStroke) && !fill.IsEmpty() && |
895 | SVGUtils::GetStrokeWidth(mFrame) > 0) { |
896 | r.UnionEdges( |
897 | SVGUtils::PathExtentsToMaxStrokeExtents(fill, mFrame, gfxMatrix())); |
898 | } |
899 | |
900 | return r; |
901 | } |
902 | |
903 | SVGBBox TextRenderedRun::GetFrameUserSpaceRect(nsPresContext* aContext, |
904 | uint32_t aFlags) const { |
905 | SVGBBox r = GetRunUserSpaceRect(aContext, aFlags); |
906 | if (r.IsEmpty()) { |
907 | return r; |
908 | } |
909 | gfxMatrix m = GetTransformFromRunUserSpaceToFrameUserSpace(aContext); |
910 | return m.TransformBounds(r.ToThebesRect()); |
911 | } |
912 | |
913 | SVGBBox TextRenderedRun::GetUserSpaceRect( |
914 | nsPresContext* aContext, uint32_t aFlags, |
915 | const gfxMatrix* aAdditionalTransform) const { |
916 | SVGBBox r = GetRunUserSpaceRect(aContext, aFlags); |
917 | if (r.IsEmpty()) { |
918 | return r; |
919 | } |
920 | gfxMatrix m = GetTransformFromRunUserSpaceToUserSpace(aContext); |
921 | if (aAdditionalTransform) { |
922 | m *= *aAdditionalTransform; |
923 | } |
924 | return m.TransformBounds(r.ToThebesRect()); |
925 | } |
926 | |
927 | void TextRenderedRun::GetClipEdges(nscoord& aVisIStartEdge, |
928 | nscoord& aVisIEndEdge) const { |
929 | uint32_t contentLength = mFrame->GetContentLength(); |
930 | if (mTextFrameContentOffset == 0 && |
931 | mTextFrameContentLength == contentLength) { |
932 | // If the rendered run covers the entire content, we know we don't need |
933 | // to clip without having to measure anything. |
934 | aVisIStartEdge = 0; |
935 | aVisIEndEdge = 0; |
936 | return; |
937 | } |
938 | |
939 | gfxSkipCharsIterator it = mFrame->EnsureTextRun(nsTextFrame::eInflated); |
940 | gfxTextRun* textRun = mFrame->GetTextRun(nsTextFrame::eInflated); |
941 | nsTextFrame::PropertyProvider provider(mFrame, it); |
942 | |
943 | // Get the covered content offset/length for this rendered run in skipped |
944 | // characters, since that is what GetAdvanceWidth expects. |
945 | Range runRange = ConvertOriginalToSkipped(it, mTextFrameContentOffset, |
946 | mTextFrameContentLength); |
947 | |
948 | // Get the offset/length of the whole nsTextFrame. |
949 | uint32_t frameOffset = mFrame->GetContentOffset(); |
950 | uint32_t frameLength = mFrame->GetContentLength(); |
951 | |
952 | // Trim the whole-nsTextFrame offset/length to remove any leading/trailing |
953 | // white space, as the nsTextFrame when painting does not include them when |
954 | // interpreting clip edges. |
955 | nsTextFrame::TrimmedOffsets trimmedOffsets = |
956 | mFrame->GetTrimmedOffsets(mFrame->TextFragment()); |
957 | TrimOffsets(frameOffset, frameLength, trimmedOffsets); |
958 | |
959 | // Convert the trimmed whole-nsTextFrame offset/length into skipped |
960 | // characters. |
961 | Range frameRange = ConvertOriginalToSkipped(it, frameOffset, frameLength); |
962 | |
963 | // Measure the advance width in the text run between the start of |
964 | // frame's content and the start of the rendered run's content, |
965 | nscoord startEdge = textRun->GetAdvanceWidth( |
966 | Range(frameRange.start, runRange.start), &provider); |
967 | |
968 | // and between the end of the rendered run's content and the end |
969 | // of the frame's content. |
970 | nscoord endEdge = |
971 | textRun->GetAdvanceWidth(Range(runRange.end, frameRange.end), &provider); |
972 | |
973 | if (textRun->IsRightToLeft()) { |
974 | aVisIStartEdge = endEdge; |
975 | aVisIEndEdge = startEdge; |
976 | } else { |
977 | aVisIStartEdge = startEdge; |
978 | aVisIEndEdge = endEdge; |
979 | } |
980 | } |
981 | |
982 | nscoord TextRenderedRun::GetAdvanceWidth() const { |
983 | gfxSkipCharsIterator it = mFrame->EnsureTextRun(nsTextFrame::eInflated); |
984 | gfxTextRun* textRun = mFrame->GetTextRun(nsTextFrame::eInflated); |
985 | nsTextFrame::PropertyProvider provider(mFrame, it); |
986 | |
987 | Range range = ConvertOriginalToSkipped(it, mTextFrameContentOffset, |
988 | mTextFrameContentLength); |
989 | |
990 | return textRun->GetAdvanceWidth(range, &provider); |
991 | } |
992 | |
993 | int32_t TextRenderedRun::GetCharNumAtPosition(nsPresContext* aContext, |
994 | const gfxPoint& aPoint) const { |
995 | if (mTextFrameContentLength == 0) { |
996 | return -1; |
997 | } |
998 | |
999 | float cssPxPerDevPx = |
1000 | nsPresContext::AppUnitsToFloatCSSPixels(aContext->AppUnitsPerDevPixel()); |
1001 | |
1002 | // Convert the point from user space into run user space, and take |
1003 | // into account any mFontSizeScaleFactor. |
1004 | gfxMatrix m = GetTransformFromRunUserSpaceToUserSpace(aContext); |
1005 | if (!m.Invert()) { |
1006 | return -1; |
1007 | } |
1008 | gfxPoint p = m.TransformPoint(aPoint) / cssPxPerDevPx * mFontSizeScaleFactor; |
1009 | |
1010 | // First check that the point lies vertically between the top and bottom |
1011 | // edges of the text. |
1012 | gfxFloat ascent, descent; |
1013 | GetAscentAndDescentInAppUnits(mFrame, ascent, descent); |
1014 | |
1015 | WritingMode writingMode = mFrame->GetWritingMode(); |
1016 | if (writingMode.IsVertical()) { |
1017 | gfxFloat leftEdge = mFrame->GetLogicalBaseline(writingMode) - |
1018 | (writingMode.IsVerticalRL() ? ascent : descent); |
1019 | gfxFloat rightEdge = leftEdge + ascent + descent; |
1020 | if (p.x < aContext->AppUnitsToGfxUnits(leftEdge) || |
1021 | p.x > aContext->AppUnitsToGfxUnits(rightEdge)) { |
1022 | return -1; |
1023 | } |
1024 | } else { |
1025 | gfxFloat topEdge = mFrame->GetLogicalBaseline(writingMode) - ascent; |
1026 | gfxFloat bottomEdge = topEdge + ascent + descent; |
1027 | if (p.y < aContext->AppUnitsToGfxUnits(topEdge) || |
1028 | p.y > aContext->AppUnitsToGfxUnits(bottomEdge)) { |
1029 | return -1; |
1030 | } |
1031 | } |
1032 | |
1033 | gfxSkipCharsIterator it = mFrame->EnsureTextRun(nsTextFrame::eInflated); |
1034 | gfxTextRun* textRun = mFrame->GetTextRun(nsTextFrame::eInflated); |
1035 | nsTextFrame::PropertyProvider provider(mFrame, it); |
1036 | |
1037 | // Next check that the point lies horizontally within the left and right |
1038 | // edges of the text. |
1039 | Range range = ConvertOriginalToSkipped(it, mTextFrameContentOffset, |
1040 | mTextFrameContentLength); |
1041 | gfxFloat runAdvance = |
1042 | aContext->AppUnitsToGfxUnits(textRun->GetAdvanceWidth(range, &provider)); |
1043 | |
1044 | gfxFloat pos = writingMode.IsVertical() ? p.y : p.x; |
1045 | if (pos < 0 || pos >= runAdvance) { |
1046 | return -1; |
1047 | } |
1048 | |
1049 | // Finally, measure progressively smaller portions of the rendered run to |
1050 | // find which glyph it lies within. This will need to change once we |
1051 | // support letter-spacing and word-spacing. |
1052 | bool rtl = textRun->IsRightToLeft(); |
1053 | for (int32_t i = mTextFrameContentLength - 1; i >= 0; i--) { |
1054 | range = ConvertOriginalToSkipped(it, mTextFrameContentOffset, i); |
1055 | gfxFloat advance = aContext->AppUnitsToGfxUnits( |
1056 | textRun->GetAdvanceWidth(range, &provider)); |
1057 | if ((rtl && pos < runAdvance - advance) || (!rtl && pos >= advance)) { |
1058 | return i; |
1059 | } |
1060 | } |
1061 | return -1; |
1062 | } |
1063 | |
1064 | // ---------------------------------------------------------------------------- |
1065 | // TextNodeIterator |
1066 | |
1067 | enum SubtreePosition { eBeforeSubtree, eWithinSubtree, eAfterSubtree }; |
1068 | |
1069 | /** |
1070 | * An iterator class for Text that are descendants of a given node, the |
1071 | * root. Nodes are iterated in document order. An optional subtree can be |
1072 | * specified, in which case the iterator will track whether the current state of |
1073 | * the traversal over the tree is within that subtree or is past that subtree. |
1074 | */ |
1075 | class TextNodeIterator { |
1076 | public: |
1077 | /** |
1078 | * Constructs a TextNodeIterator with the specified root node and optional |
1079 | * subtree. |
1080 | */ |
1081 | explicit TextNodeIterator(nsIContent* aRoot, nsIContent* aSubtree = nullptr) |
1082 | : mRoot(aRoot), |
1083 | mSubtree(aSubtree == aRoot ? nullptr : aSubtree), |
1084 | mCurrent(aRoot), |
1085 | mSubtreePosition(mSubtree ? eBeforeSubtree : eWithinSubtree) { |
1086 | NS_ASSERTION(aRoot, "expected non-null root")do { if (!(aRoot)) { NS_DebugBreak(NS_DEBUG_ASSERTION, "expected non-null root" , "aRoot", "/var/lib/jenkins/workspace/firefox-scan-build/layout/svg/SVGTextFrame.cpp" , 1086); MOZ_PretendNoReturn(); } } while (0); |
1087 | if (!aRoot->IsText()) { |
1088 | Next(); |
1089 | } |
1090 | } |
1091 | |
1092 | /** |
1093 | * Returns the current Text, or null if the iterator has finished. |
1094 | */ |
1095 | Text* Current() const { return mCurrent ? mCurrent->AsText() : nullptr; } |
1096 | |
1097 | /** |
1098 | * Advances to the next Text and returns it, or null if the end of |
1099 | * iteration has been reached. |
1100 | */ |
1101 | Text* Next(); |
1102 | |
1103 | /** |
1104 | * Returns whether the iterator is currently within the subtree rooted |
1105 | * at mSubtree. Returns true if we are not tracking a subtree (we consider |
1106 | * that we're always within the subtree). |
1107 | */ |
1108 | bool IsWithinSubtree() const { return mSubtreePosition == eWithinSubtree; } |
1109 | |
1110 | /** |
1111 | * Returns whether the iterator is past the subtree rooted at mSubtree. |
1112 | * Returns false if we are not tracking a subtree. |
1113 | */ |
1114 | bool IsAfterSubtree() const { return mSubtreePosition == eAfterSubtree; } |
1115 | |
1116 | private: |
1117 | /** |
1118 | * The root under which all Text will be iterated over. |
1119 | */ |
1120 | nsIContent* const mRoot; |
1121 | |
1122 | /** |
1123 | * The node rooting the subtree to track. |
1124 | */ |
1125 | nsIContent* const mSubtree; |
1126 | |
1127 | /** |
1128 | * The current node during iteration. |
1129 | */ |
1130 | nsIContent* mCurrent; |
1131 | |
1132 | /** |
1133 | * The current iterator position relative to mSubtree. |
1134 | */ |
1135 | SubtreePosition mSubtreePosition; |
1136 | }; |
1137 | |
1138 | Text* TextNodeIterator::Next() { |
1139 | // Starting from mCurrent, we do a non-recursive traversal to the next |
1140 | // Text beneath mRoot, updating mSubtreePosition appropriately if we |
1141 | // encounter mSubtree. |
1142 | if (mCurrent) { |
1143 | do { |
1144 | nsIContent* next = |
1145 | IsTextContentElement(mCurrent) ? mCurrent->GetFirstChild() : nullptr; |
1146 | if (next) { |
1147 | mCurrent = next; |
1148 | if (mCurrent == mSubtree) { |
1149 | mSubtreePosition = eWithinSubtree; |
1150 | } |
1151 | } else { |
1152 | for (;;) { |
1153 | if (mCurrent == mRoot) { |
1154 | mCurrent = nullptr; |
1155 | break; |
1156 | } |
1157 | if (mCurrent == mSubtree) { |
1158 | mSubtreePosition = eAfterSubtree; |
1159 | } |
1160 | next = mCurrent->GetNextSibling(); |
1161 | if (next) { |
1162 | mCurrent = next; |
1163 | if (mCurrent == mSubtree) { |
1164 | mSubtreePosition = eWithinSubtree; |
1165 | } |
1166 | break; |
1167 | } |
1168 | if (mCurrent == mSubtree) { |
1169 | mSubtreePosition = eAfterSubtree; |
1170 | } |
1171 | mCurrent = mCurrent->GetParent(); |
1172 | } |
1173 | } |
1174 | } while (mCurrent && !mCurrent->IsText()); |
1175 | } |
1176 | |
1177 | return mCurrent ? mCurrent->AsText() : nullptr; |
1178 | } |
1179 | |
1180 | // ---------------------------------------------------------------------------- |
1181 | // TextNodeCorrespondenceRecorder |
1182 | |
1183 | /** |
1184 | * TextNodeCorrespondence is used as the value of a frame property that |
1185 | * is stored on all its descendant nsTextFrames. It stores the number of DOM |
1186 | * characters between it and the previous nsTextFrame that did not have an |
1187 | * nsTextFrame created for them, due to either not being in a correctly |
1188 | * parented text content element, or because they were display:none. |
1189 | * These are called "undisplayed characters". |
1190 | * |
1191 | * See also TextNodeCorrespondenceRecorder below, which is what sets the |
1192 | * frame property. |
1193 | */ |
1194 | struct TextNodeCorrespondence { |
1195 | explicit TextNodeCorrespondence(uint32_t aUndisplayedCharacters) |
1196 | : mUndisplayedCharacters(aUndisplayedCharacters) {} |
1197 | |
1198 | uint32_t mUndisplayedCharacters; |
1199 | }; |
1200 | |
1201 | NS_DECLARE_FRAME_PROPERTY_DELETABLE(TextNodeCorrespondenceProperty,static const mozilla::FramePropertyDescriptor<TextNodeCorrespondence >* TextNodeCorrespondenceProperty() { static const auto descriptor = mozilla::FramePropertyDescriptor<TextNodeCorrespondence >::NewWithDestructor<DeleteValue>(); return &descriptor ; } |
1202 | TextNodeCorrespondence)static const mozilla::FramePropertyDescriptor<TextNodeCorrespondence >* TextNodeCorrespondenceProperty() { static const auto descriptor = mozilla::FramePropertyDescriptor<TextNodeCorrespondence >::NewWithDestructor<DeleteValue>(); return &descriptor ; } |
1203 | |
1204 | /** |
1205 | * Returns the number of undisplayed characters before the specified |
1206 | * nsTextFrame. |
1207 | */ |
1208 | static uint32_t GetUndisplayedCharactersBeforeFrame(nsTextFrame* aFrame) { |
1209 | void* value = aFrame->GetProperty(TextNodeCorrespondenceProperty()); |
1210 | TextNodeCorrespondence* correspondence = |
1211 | static_cast<TextNodeCorrespondence*>(value); |
1212 | if (!correspondence) { |
1213 | // FIXME bug 903785 |
1214 | NS_ERROR(do { NS_DebugBreak(NS_DEBUG_ASSERTION, "expected a TextNodeCorrespondenceProperty on nsTextFrame " "used for SVG text", "Error", "/var/lib/jenkins/workspace/firefox-scan-build/layout/svg/SVGTextFrame.cpp" , 1216); MOZ_PretendNoReturn(); } while (0) |
1215 | "expected a TextNodeCorrespondenceProperty on nsTextFrame "do { NS_DebugBreak(NS_DEBUG_ASSERTION, "expected a TextNodeCorrespondenceProperty on nsTextFrame " "used for SVG text", "Error", "/var/lib/jenkins/workspace/firefox-scan-build/layout/svg/SVGTextFrame.cpp" , 1216); MOZ_PretendNoReturn(); } while (0) |
1216 | "used for SVG text")do { NS_DebugBreak(NS_DEBUG_ASSERTION, "expected a TextNodeCorrespondenceProperty on nsTextFrame " "used for SVG text", "Error", "/var/lib/jenkins/workspace/firefox-scan-build/layout/svg/SVGTextFrame.cpp" , 1216); MOZ_PretendNoReturn(); } while (0); |
1217 | return 0; |
1218 | } |
1219 | return correspondence->mUndisplayedCharacters; |
1220 | } |
1221 | |
1222 | /** |
1223 | * Traverses the nsTextFrames for an SVGTextFrame and records a |
1224 | * TextNodeCorrespondenceProperty on each for the number of undisplayed DOM |
1225 | * characters between each frame. This is done by iterating simultaneously |
1226 | * over the Text and nsTextFrames and noting when Text (or |
1227 | * parts of them) are skipped when finding the next nsTextFrame. |
1228 | */ |
1229 | class TextNodeCorrespondenceRecorder { |
1230 | public: |
1231 | /** |
1232 | * Entry point for the TextNodeCorrespondenceProperty recording. |
1233 | */ |
1234 | static void RecordCorrespondence(SVGTextFrame* aRoot); |
1235 | |
1236 | private: |
1237 | explicit TextNodeCorrespondenceRecorder(SVGTextFrame* aRoot) |
1238 | : mNodeIterator(aRoot->GetContent()), |
1239 | mPreviousNode(nullptr), |
1240 | mNodeCharIndex(0) {} |
1241 | |
1242 | void Record(SVGTextFrame* aRoot); |
1243 | void TraverseAndRecord(nsIFrame* aFrame); |
1244 | |
1245 | /** |
1246 | * Returns the next non-empty Text. |
1247 | */ |
1248 | Text* NextNode(); |
1249 | |
1250 | /** |
1251 | * The iterator over the Text that we use as we simultaneously |
1252 | * iterate over the nsTextFrames. |
1253 | */ |
1254 | TextNodeIterator mNodeIterator; |
1255 | |
1256 | /** |
1257 | * The previous Text we iterated over. |
1258 | */ |
1259 | Text* mPreviousNode; |
1260 | |
1261 | /** |
1262 | * The index into the current Text's character content. |
1263 | */ |
1264 | uint32_t mNodeCharIndex; |
1265 | }; |
1266 | |
1267 | /* static */ |
1268 | void TextNodeCorrespondenceRecorder::RecordCorrespondence(SVGTextFrame* aRoot) { |
1269 | if (aRoot->HasAnyStateBits(NS_STATE_SVG_TEXT_CORRESPONDENCE_DIRTY)) { |
1270 | // Resolve bidi so that continuation frames are created if necessary: |
1271 | aRoot->MaybeResolveBidiForAnonymousBlockChild(); |
1272 | TextNodeCorrespondenceRecorder recorder(aRoot); |
1273 | recorder.Record(aRoot); |
1274 | aRoot->RemoveStateBits(NS_STATE_SVG_TEXT_CORRESPONDENCE_DIRTY); |
1275 | } |
1276 | } |
1277 | |
1278 | void TextNodeCorrespondenceRecorder::Record(SVGTextFrame* aRoot) { |
1279 | if (!mNodeIterator.Current()) { |
1280 | // If there are no Text nodes then there is nothing to do. |
1281 | return; |
1282 | } |
1283 | |
1284 | // Traverse over all the nsTextFrames and record the number of undisplayed |
1285 | // characters. |
1286 | TraverseAndRecord(aRoot); |
1287 | |
1288 | // Find how many undisplayed characters there are after the final nsTextFrame. |
1289 | uint32_t undisplayed = 0; |
1290 | if (mNodeIterator.Current()) { |
1291 | if (mPreviousNode && mPreviousNode->TextLength() != mNodeCharIndex) { |
1292 | // The last nsTextFrame ended part way through a Text node. The |
1293 | // remaining characters count as undisplayed. |
1294 | NS_ASSERTION(mNodeCharIndex < mPreviousNode->TextLength(),do { if (!(mNodeCharIndex < mPreviousNode->TextLength() )) { NS_DebugBreak(NS_DEBUG_ASSERTION, "incorrect tracking of undisplayed characters in " "text nodes", "mNodeCharIndex < mPreviousNode->TextLength()" , "/var/lib/jenkins/workspace/firefox-scan-build/layout/svg/SVGTextFrame.cpp" , 1296); MOZ_PretendNoReturn(); } } while (0) |
1295 | "incorrect tracking of undisplayed characters in "do { if (!(mNodeCharIndex < mPreviousNode->TextLength() )) { NS_DebugBreak(NS_DEBUG_ASSERTION, "incorrect tracking of undisplayed characters in " "text nodes", "mNodeCharIndex < mPreviousNode->TextLength()" , "/var/lib/jenkins/workspace/firefox-scan-build/layout/svg/SVGTextFrame.cpp" , 1296); MOZ_PretendNoReturn(); } } while (0) |
1296 | "text nodes")do { if (!(mNodeCharIndex < mPreviousNode->TextLength() )) { NS_DebugBreak(NS_DEBUG_ASSERTION, "incorrect tracking of undisplayed characters in " "text nodes", "mNodeCharIndex < mPreviousNode->TextLength()" , "/var/lib/jenkins/workspace/firefox-scan-build/layout/svg/SVGTextFrame.cpp" , 1296); MOZ_PretendNoReturn(); } } while (0); |
1297 | undisplayed += mPreviousNode->TextLength() - mNodeCharIndex; |
1298 | } |
1299 | // All the remaining Text that we iterate must also be undisplayed. |
1300 | for (Text* textNode = mNodeIterator.Current(); textNode; |
1301 | textNode = NextNode()) { |
1302 | undisplayed += textNode->TextLength(); |
1303 | } |
1304 | } |
1305 | |
1306 | // Record the trailing number of undisplayed characters on the |
1307 | // SVGTextFrame. |
1308 | aRoot->mTrailingUndisplayedCharacters = undisplayed; |
1309 | } |
1310 | |
1311 | Text* TextNodeCorrespondenceRecorder::NextNode() { |
1312 | mPreviousNode = mNodeIterator.Current(); |
1313 | Text* next; |
1314 | do { |
1315 | next = mNodeIterator.Next(); |
1316 | } while (next && next->TextLength() == 0); |
1317 | return next; |
1318 | } |
1319 | |
1320 | void TextNodeCorrespondenceRecorder::TraverseAndRecord(nsIFrame* aFrame) { |
1321 | // Recursively iterate over the frame tree, for frames that correspond |
1322 | // to text content elements. |
1323 | if (IsTextContentElement(aFrame->GetContent())) { |
1324 | for (nsIFrame* f : aFrame->PrincipalChildList()) { |
1325 | TraverseAndRecord(f); |
1326 | } |
1327 | return; |
1328 | } |
1329 | |
1330 | nsTextFrame* frame; // The current text frame. |
1331 | Text* node; // The text node for the current text frame. |
1332 | if (!GetNonEmptyTextFrameAndNode(aFrame, frame, node)) { |
1333 | // If this isn't an nsTextFrame, or is empty, nothing to do. |
1334 | return; |
1335 | } |
1336 | |
1337 | NS_ASSERTION(frame->GetContentOffset() >= 0,do { if (!(frame->GetContentOffset() >= 0)) { NS_DebugBreak (NS_DEBUG_ASSERTION, "don't know how to handle negative content indexes" , "frame->GetContentOffset() >= 0", "/var/lib/jenkins/workspace/firefox-scan-build/layout/svg/SVGTextFrame.cpp" , 1338); MOZ_PretendNoReturn(); } } while (0) |
1338 | "don't know how to handle negative content indexes")do { if (!(frame->GetContentOffset() >= 0)) { NS_DebugBreak (NS_DEBUG_ASSERTION, "don't know how to handle negative content indexes" , "frame->GetContentOffset() >= 0", "/var/lib/jenkins/workspace/firefox-scan-build/layout/svg/SVGTextFrame.cpp" , 1338); MOZ_PretendNoReturn(); } } while (0); |
1339 | |
1340 | uint32_t undisplayed = 0; |
1341 | if (!mPreviousNode) { |
1342 | // Must be the very first text frame. |
1343 | NS_ASSERTION(mNodeCharIndex == 0,do { if (!(mNodeCharIndex == 0)) { NS_DebugBreak(NS_DEBUG_ASSERTION , "incorrect tracking of undisplayed " "characters in text nodes" , "mNodeCharIndex == 0", "/var/lib/jenkins/workspace/firefox-scan-build/layout/svg/SVGTextFrame.cpp" , 1345); MOZ_PretendNoReturn(); } } while (0) |
1344 | "incorrect tracking of undisplayed "do { if (!(mNodeCharIndex == 0)) { NS_DebugBreak(NS_DEBUG_ASSERTION , "incorrect tracking of undisplayed " "characters in text nodes" , "mNodeCharIndex == 0", "/var/lib/jenkins/workspace/firefox-scan-build/layout/svg/SVGTextFrame.cpp" , 1345); MOZ_PretendNoReturn(); } } while (0) |
1345 | "characters in text nodes")do { if (!(mNodeCharIndex == 0)) { NS_DebugBreak(NS_DEBUG_ASSERTION , "incorrect tracking of undisplayed " "characters in text nodes" , "mNodeCharIndex == 0", "/var/lib/jenkins/workspace/firefox-scan-build/layout/svg/SVGTextFrame.cpp" , 1345); MOZ_PretendNoReturn(); } } while (0); |
1346 | if (!mNodeIterator.Current()) { |
1347 | MOZ_ASSERT_UNREACHABLE(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: " "incorrect tracking of correspondence between " "text frames and text nodes" ")", "/var/lib/jenkins/workspace/firefox-scan-build/layout/svg/SVGTextFrame.cpp" , 1349); AnnotateMozCrashReason("MOZ_ASSERT" "(" "false" ") (" "MOZ_ASSERT_UNREACHABLE: " "incorrect tracking of correspondence between " "text frames and text nodes" ")"); do { *((volatile int*)__null ) = 1349; __attribute__((nomerge)) ::abort(); } while (false) ; } } while (false) |
1348 | "incorrect tracking of correspondence between "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: " "incorrect tracking of correspondence between " "text frames and text nodes" ")", "/var/lib/jenkins/workspace/firefox-scan-build/layout/svg/SVGTextFrame.cpp" , 1349); AnnotateMozCrashReason("MOZ_ASSERT" "(" "false" ") (" "MOZ_ASSERT_UNREACHABLE: " "incorrect tracking of correspondence between " "text frames and text nodes" ")"); do { *((volatile int*)__null ) = 1349; __attribute__((nomerge)) ::abort(); } while (false) ; } } while (false) |
1349 | "text frames and text nodes")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: " "incorrect tracking of correspondence between " "text frames and text nodes" ")", "/var/lib/jenkins/workspace/firefox-scan-build/layout/svg/SVGTextFrame.cpp" , 1349); AnnotateMozCrashReason("MOZ_ASSERT" "(" "false" ") (" "MOZ_ASSERT_UNREACHABLE: " "incorrect tracking of correspondence between " "text frames and text nodes" ")"); do { *((volatile int*)__null ) = 1349; __attribute__((nomerge)) ::abort(); } while (false) ; } } while (false); |
1350 | } else { |
1351 | // Each whole Text we find before we get to the text node for the |
1352 | // first text frame must be undisplayed. |
1353 | while (mNodeIterator.Current() != node) { |
1354 | undisplayed += mNodeIterator.Current()->TextLength(); |
1355 | NextNode(); |
1356 | } |
1357 | // If the first text frame starts at a non-zero content offset, then those |
1358 | // earlier characters are also undisplayed. |
1359 | undisplayed += frame->GetContentOffset(); |
1360 | NextNode(); |
1361 | } |
1362 | } else if (mPreviousNode == node) { |
1363 | // Same text node as last time. |
1364 | if (static_cast<uint32_t>(frame->GetContentOffset()) != mNodeCharIndex) { |
1365 | // We have some characters in the middle of the text node |
1366 | // that are undisplayed. |
1367 | NS_ASSERTION(do { if (!(mNodeCharIndex < static_cast<uint32_t>(frame ->GetContentOffset()))) { NS_DebugBreak(NS_DEBUG_ASSERTION , "incorrect tracking of undisplayed characters in " "text nodes" , "mNodeCharIndex < static_cast<uint32_t>(frame->GetContentOffset())" , "/var/lib/jenkins/workspace/firefox-scan-build/layout/svg/SVGTextFrame.cpp" , 1370); MOZ_PretendNoReturn(); } } while (0) |
1368 | mNodeCharIndex < static_cast<uint32_t>(frame->GetContentOffset()),do { if (!(mNodeCharIndex < static_cast<uint32_t>(frame ->GetContentOffset()))) { NS_DebugBreak(NS_DEBUG_ASSERTION , "incorrect tracking of undisplayed characters in " "text nodes" , "mNodeCharIndex < static_cast<uint32_t>(frame->GetContentOffset())" , "/var/lib/jenkins/workspace/firefox-scan-build/layout/svg/SVGTextFrame.cpp" , 1370); MOZ_PretendNoReturn(); } } while (0) |
1369 | "incorrect tracking of undisplayed characters in "do { if (!(mNodeCharIndex < static_cast<uint32_t>(frame ->GetContentOffset()))) { NS_DebugBreak(NS_DEBUG_ASSERTION , "incorrect tracking of undisplayed characters in " "text nodes" , "mNodeCharIndex < static_cast<uint32_t>(frame->GetContentOffset())" , "/var/lib/jenkins/workspace/firefox-scan-build/layout/svg/SVGTextFrame.cpp" , 1370); MOZ_PretendNoReturn(); } } while (0) |
1370 | "text nodes")do { if (!(mNodeCharIndex < static_cast<uint32_t>(frame ->GetContentOffset()))) { NS_DebugBreak(NS_DEBUG_ASSERTION , "incorrect tracking of undisplayed characters in " "text nodes" , "mNodeCharIndex < static_cast<uint32_t>(frame->GetContentOffset())" , "/var/lib/jenkins/workspace/firefox-scan-build/layout/svg/SVGTextFrame.cpp" , 1370); MOZ_PretendNoReturn(); } } while (0); |
1371 | undisplayed = frame->GetContentOffset() - mNodeCharIndex; |
1372 | } |
1373 | } else { |
1374 | // Different text node from last time. |
1375 | if (mPreviousNode->TextLength() != mNodeCharIndex) { |
1376 | NS_ASSERTION(mNodeCharIndex < mPreviousNode->TextLength(),do { if (!(mNodeCharIndex < mPreviousNode->TextLength() )) { NS_DebugBreak(NS_DEBUG_ASSERTION, "incorrect tracking of undisplayed characters in " "text nodes", "mNodeCharIndex < mPreviousNode->TextLength()" , "/var/lib/jenkins/workspace/firefox-scan-build/layout/svg/SVGTextFrame.cpp" , 1378); MOZ_PretendNoReturn(); } } while (0) |
1377 | "incorrect tracking of undisplayed characters in "do { if (!(mNodeCharIndex < mPreviousNode->TextLength() )) { NS_DebugBreak(NS_DEBUG_ASSERTION, "incorrect tracking of undisplayed characters in " "text nodes", "mNodeCharIndex < mPreviousNode->TextLength()" , "/var/lib/jenkins/workspace/firefox-scan-build/layout/svg/SVGTextFrame.cpp" , 1378); MOZ_PretendNoReturn(); } } while (0) |
1378 | "text nodes")do { if (!(mNodeCharIndex < mPreviousNode->TextLength() )) { NS_DebugBreak(NS_DEBUG_ASSERTION, "incorrect tracking of undisplayed characters in " "text nodes", "mNodeCharIndex < mPreviousNode->TextLength()" , "/var/lib/jenkins/workspace/firefox-scan-build/layout/svg/SVGTextFrame.cpp" , 1378); MOZ_PretendNoReturn(); } } while (0); |
1379 | // Any trailing characters at the end of the previous Text are |
1380 | // undisplayed. |
1381 | undisplayed = mPreviousNode->TextLength() - mNodeCharIndex; |
1382 | } |
1383 | // Each whole Text we find before we get to the text node for |
1384 | // the current text frame must be undisplayed. |
1385 | while (mNodeIterator.Current() && mNodeIterator.Current() != node) { |
1386 | undisplayed += mNodeIterator.Current()->TextLength(); |
1387 | NextNode(); |
1388 | } |
1389 | // If the current text frame starts at a non-zero content offset, then those |
1390 | // earlier characters are also undisplayed. |
1391 | undisplayed += frame->GetContentOffset(); |
1392 | NextNode(); |
1393 | } |
1394 | |
1395 | // Set the frame property. |
1396 | frame->SetProperty(TextNodeCorrespondenceProperty(), |
1397 | new TextNodeCorrespondence(undisplayed)); |
1398 | |
1399 | // Remember how far into the current Text we are. |
1400 | mNodeCharIndex = frame->GetContentEnd(); |
1401 | } |
1402 | |
1403 | // ---------------------------------------------------------------------------- |
1404 | // TextFrameIterator |
1405 | |
1406 | /** |
1407 | * An iterator class for nsTextFrames that are descendants of an |
1408 | * SVGTextFrame. The iterator can optionally track whether the |
1409 | * current nsTextFrame is for a descendant of, or past, a given subtree |
1410 | * content node or frame. (This functionality is used for example by the SVG |
1411 | * DOM text methods to get only the nsTextFrames for a particular <tspan>.) |
1412 | * |
1413 | * TextFrameIterator also tracks and exposes other information about the |
1414 | * current nsTextFrame: |
1415 | * |
1416 | * * how many undisplayed characters came just before it |
1417 | * * its position (in app units) relative to the SVGTextFrame's anonymous |
1418 | * block frame |
1419 | * * what nsInlineFrame corresponding to a <textPath> element it is a |
1420 | * descendant of |
1421 | * * what computed dominant-baseline value applies to it |
1422 | * |
1423 | * Note that any text frames that are empty -- whose ContentLength() is 0 -- |
1424 | * will be skipped over. |
1425 | */ |
1426 | class MOZ_STACK_CLASS TextFrameIterator { |
1427 | public: |
1428 | /** |
1429 | * Constructs a TextFrameIterator for the specified SVGTextFrame |
1430 | * with an optional frame subtree to restrict iterated text frames to. |
1431 | */ |
1432 | explicit TextFrameIterator(SVGTextFrame* aRoot, |
1433 | const nsIFrame* aSubtree = nullptr) |
1434 | : mRootFrame(aRoot), |
1435 | mSubtree(aSubtree), |
1436 | mCurrentFrame(aRoot), |
1437 | mSubtreePosition(mSubtree ? eBeforeSubtree : eWithinSubtree) { |
1438 | Init(); |
1439 | } |
1440 | |
1441 | /** |
1442 | * Constructs a TextFrameIterator for the specified SVGTextFrame |
1443 | * with an optional frame content subtree to restrict iterated text frames to. |
1444 | */ |
1445 | TextFrameIterator(SVGTextFrame* aRoot, nsIContent* aSubtree) |
1446 | : mRootFrame(aRoot), |
1447 | mSubtree(aRoot && aSubtree && aSubtree != aRoot->GetContent() |
1448 | ? aSubtree->GetPrimaryFrame() |
1449 | : nullptr), |
1450 | mCurrentFrame(aRoot), |
1451 | mSubtreePosition(mSubtree ? eBeforeSubtree : eWithinSubtree) { |
1452 | Init(); |
1453 | } |
1454 | |
1455 | /** |
1456 | * Returns the root SVGTextFrame this TextFrameIterator is iterating over. |
1457 | */ |
1458 | SVGTextFrame* Root() const { return mRootFrame; } |
1459 | |
1460 | /** |
1461 | * Returns the current nsTextFrame. |
1462 | */ |
1463 | nsTextFrame* Current() const { return do_QueryFrame(mCurrentFrame); } |
1464 | |
1465 | /** |
1466 | * Returns the number of undisplayed characters in the DOM just before the |
1467 | * current frame. |
1468 | */ |
1469 | uint32_t UndisplayedCharacters() const; |
1470 | |
1471 | /** |
1472 | * Returns the current frame's position, in app units, relative to the |
1473 | * root SVGTextFrame's anonymous block frame. |
1474 | */ |
1475 | nsPoint Position() const { return mCurrentPosition; } |
1476 | |
1477 | /** |
1478 | * Advances to the next nsTextFrame and returns it. |
1479 | */ |
1480 | nsTextFrame* Next(); |
1481 | |
1482 | /** |
1483 | * Returns whether the iterator is within the subtree. |
1484 | */ |
1485 | bool IsWithinSubtree() const { return mSubtreePosition == eWithinSubtree; } |
1486 | |
1487 | /** |
1488 | * Returns whether the iterator is past the subtree. |
1489 | */ |
1490 | bool IsAfterSubtree() const { return mSubtreePosition == eAfterSubtree; } |
1491 | |
1492 | /** |
1493 | * Returns the frame corresponding to the <textPath> element, if we |
1494 | * are inside one. |
1495 | */ |
1496 | nsIFrame* TextPathFrame() const { |
1497 | return mTextPathFrames.IsEmpty() ? nullptr : mTextPathFrames.LastElement(); |
1498 | } |
1499 | |
1500 | /** |
1501 | * Returns the current frame's computed dominant-baseline value. |
1502 | */ |
1503 | StyleDominantBaseline DominantBaseline() const { |
1504 | return mBaselines.LastElement(); |
1505 | } |
1506 | |
1507 | /** |
1508 | * Finishes the iterator. |
1509 | */ |
1510 | void Close() { mCurrentFrame = nullptr; } |
1511 | |
1512 | private: |
1513 | /** |
1514 | * Initializes the iterator and advances to the first item. |
1515 | */ |
1516 | void Init() { |
1517 | if (!mRootFrame) { |
1518 | return; |
1519 | } |
1520 | |
1521 | mBaselines.AppendElement(mRootFrame->StyleSVG()->mDominantBaseline); |
1522 | Next(); |
1523 | } |
1524 | |
1525 | /** |
1526 | * Pushes the specified frame's computed dominant-baseline value. |
1527 | * If the value of the property is "auto", then the parent frame's |
1528 | * computed value is used. |
1529 | */ |
1530 | void PushBaseline(nsIFrame* aNextFrame); |
1531 | |
1532 | /** |
1533 | * Pops the current dominant-baseline off the stack. |
1534 | */ |
1535 | void PopBaseline(); |
1536 | |
1537 | /** |
1538 | * The root frame we are iterating through. |
1539 | */ |
1540 | SVGTextFrame* const mRootFrame; |
1541 | |
1542 | /** |
1543 | * The frame for the subtree we are also interested in tracking. |
1544 | */ |
1545 | const nsIFrame* const mSubtree; |
1546 | |
1547 | /** |
1548 | * The current value of the iterator. |
1549 | */ |
1550 | nsIFrame* mCurrentFrame; |
1551 | |
1552 | /** |
1553 | * The position, in app units, of the current frame relative to mRootFrame. |
1554 | */ |
1555 | nsPoint mCurrentPosition; |
1556 | |
1557 | /** |
1558 | * Stack of frames corresponding to <textPath> elements that are in scope |
1559 | * for the current frame. |
1560 | */ |
1561 | AutoTArray<nsIFrame*, 1> mTextPathFrames; |
1562 | |
1563 | /** |
1564 | * Stack of dominant-baseline values to record as we traverse through the |
1565 | * frame tree. |
1566 | */ |
1567 | AutoTArray<StyleDominantBaseline, 8> mBaselines; |
1568 | |
1569 | /** |
1570 | * The iterator's current position relative to mSubtree. |
1571 | */ |
1572 | SubtreePosition mSubtreePosition; |
1573 | }; |
1574 | |
1575 | uint32_t TextFrameIterator::UndisplayedCharacters() const { |
1576 | MOZ_ASSERT(do { static_assert( mozilla::detail::AssertionConditionType< decltype(!mRootFrame->HasAnyStateBits(NS_STATE_SVG_TEXT_CORRESPONDENCE_DIRTY ))>::isValid, "invalid assertion condition"); if ((__builtin_expect (!!(!(!!(!mRootFrame->HasAnyStateBits(NS_STATE_SVG_TEXT_CORRESPONDENCE_DIRTY )))), 0))) { do { } while (false); MOZ_ReportAssertionFailure ("!mRootFrame->HasAnyStateBits(NS_STATE_SVG_TEXT_CORRESPONDENCE_DIRTY)" " (" "Text correspondence must be up to date" ")", "/var/lib/jenkins/workspace/firefox-scan-build/layout/svg/SVGTextFrame.cpp" , 1578); AnnotateMozCrashReason("MOZ_ASSERT" "(" "!mRootFrame->HasAnyStateBits(NS_STATE_SVG_TEXT_CORRESPONDENCE_DIRTY)" ") (" "Text correspondence must be up to date" ")"); do { *( (volatile int*)__null) = 1578; __attribute__((nomerge)) ::abort (); } while (false); } } while (false) |
1577 | !mRootFrame->HasAnyStateBits(NS_STATE_SVG_TEXT_CORRESPONDENCE_DIRTY),do { static_assert( mozilla::detail::AssertionConditionType< decltype(!mRootFrame->HasAnyStateBits(NS_STATE_SVG_TEXT_CORRESPONDENCE_DIRTY ))>::isValid, "invalid assertion condition"); if ((__builtin_expect (!!(!(!!(!mRootFrame->HasAnyStateBits(NS_STATE_SVG_TEXT_CORRESPONDENCE_DIRTY )))), 0))) { do { } while (false); MOZ_ReportAssertionFailure ("!mRootFrame->HasAnyStateBits(NS_STATE_SVG_TEXT_CORRESPONDENCE_DIRTY)" " (" "Text correspondence must be up to date" ")", "/var/lib/jenkins/workspace/firefox-scan-build/layout/svg/SVGTextFrame.cpp" , 1578); AnnotateMozCrashReason("MOZ_ASSERT" "(" "!mRootFrame->HasAnyStateBits(NS_STATE_SVG_TEXT_CORRESPONDENCE_DIRTY)" ") (" "Text correspondence must be up to date" ")"); do { *( (volatile int*)__null) = 1578; __attribute__((nomerge)) ::abort (); } while (false); } } while (false) |
1578 | "Text correspondence must be up to date")do { static_assert( mozilla::detail::AssertionConditionType< decltype(!mRootFrame->HasAnyStateBits(NS_STATE_SVG_TEXT_CORRESPONDENCE_DIRTY ))>::isValid, "invalid assertion condition"); if ((__builtin_expect (!!(!(!!(!mRootFrame->HasAnyStateBits(NS_STATE_SVG_TEXT_CORRESPONDENCE_DIRTY )))), 0))) { do { } while (false); MOZ_ReportAssertionFailure ("!mRootFrame->HasAnyStateBits(NS_STATE_SVG_TEXT_CORRESPONDENCE_DIRTY)" " (" "Text correspondence must be up to date" ")", "/var/lib/jenkins/workspace/firefox-scan-build/layout/svg/SVGTextFrame.cpp" , 1578); AnnotateMozCrashReason("MOZ_ASSERT" "(" "!mRootFrame->HasAnyStateBits(NS_STATE_SVG_TEXT_CORRESPONDENCE_DIRTY)" ") (" "Text correspondence must be up to date" ")"); do { *( (volatile int*)__null) = 1578; __attribute__((nomerge)) ::abort (); } while (false); } } while (false); |
1579 | |
1580 | if (!mCurrentFrame) { |
1581 | return mRootFrame->mTrailingUndisplayedCharacters; |
1582 | } |
1583 | |
1584 | nsTextFrame* frame = do_QueryFrame(mCurrentFrame); |
1585 | return GetUndisplayedCharactersBeforeFrame(frame); |
1586 | } |
1587 | |
1588 | nsTextFrame* TextFrameIterator::Next() { |
1589 | // Starting from mCurrentFrame, we do a non-recursive traversal to the next |
1590 | // nsTextFrame beneath mRoot, updating mSubtreePosition appropriately if we |
1591 | // encounter mSubtree. |
1592 | if (mCurrentFrame) { |
1593 | do { |
1594 | nsIFrame* next = IsTextContentElement(mCurrentFrame->GetContent()) |
1595 | ? mCurrentFrame->PrincipalChildList().FirstChild() |
1596 | : nullptr; |
1597 | if (next) { |
1598 | // Descend into this frame, and accumulate its position. |
1599 | mCurrentPosition += next->GetPosition(); |
1600 | if (next->GetContent()->IsSVGElement(nsGkAtoms::textPath)) { |
1601 | // Record this <textPath> frame. |
1602 | mTextPathFrames.AppendElement(next); |
1603 | } |
1604 | // Record the frame's baseline. |
1605 | PushBaseline(next); |
1606 | mCurrentFrame = next; |
1607 | if (mCurrentFrame == mSubtree) { |
1608 | // If the current frame is mSubtree, we have now moved into it. |
1609 | mSubtreePosition = eWithinSubtree; |
1610 | } |
1611 | } else { |
1612 | for (;;) { |
1613 | // We want to move past the current frame. |
1614 | if (mCurrentFrame == mRootFrame) { |
1615 | // If we've reached the root frame, we're finished. |
1616 | mCurrentFrame = nullptr; |
1617 | break; |
1618 | } |
1619 | // Remove the current frame's position. |
1620 | mCurrentPosition -= mCurrentFrame->GetPosition(); |
1621 | if (mCurrentFrame->GetContent()->IsSVGElement(nsGkAtoms::textPath)) { |
1622 | // Pop off the <textPath> frame if this is a <textPath>. |
1623 | mTextPathFrames.RemoveLastElement(); |
1624 | } |
1625 | // Pop off the current baseline. |
1626 | PopBaseline(); |
1627 | if (mCurrentFrame == mSubtree) { |
1628 | // If this was mSubtree, we have now moved past it. |
1629 | mSubtreePosition = eAfterSubtree; |
1630 | } |
1631 | next = mCurrentFrame->GetNextSibling(); |
1632 | if (next) { |
1633 | // Moving to the next sibling. |
1634 | mCurrentPosition += next->GetPosition(); |
1635 | if (next->GetContent()->IsSVGElement(nsGkAtoms::textPath)) { |
1636 | // Record this <textPath> frame. |
1637 | mTextPathFrames.AppendElement(next); |
1638 | } |
1639 | // Record the frame's baseline. |
1640 | PushBaseline(next); |
1641 | mCurrentFrame = next; |
1642 | if (mCurrentFrame == mSubtree) { |
1643 | // If the current frame is mSubtree, we have now moved into it. |
1644 | mSubtreePosition = eWithinSubtree; |
1645 | } |
1646 | break; |
1647 | } |
1648 | if (mCurrentFrame == mSubtree) { |
1649 | // If there is no next sibling frame, and the current frame is |
1650 | // mSubtree, we have now moved past it. |
1651 | mSubtreePosition = eAfterSubtree; |
1652 | } |
1653 | // Ascend out of this frame. |
1654 | mCurrentFrame = mCurrentFrame->GetParent(); |
1655 | } |
1656 | } |
1657 | } while (mCurrentFrame && !IsNonEmptyTextFrame(mCurrentFrame)); |
1658 | } |
1659 | |
1660 | return Current(); |
1661 | } |
1662 | |
1663 | void TextFrameIterator::PushBaseline(nsIFrame* aNextFrame) { |
1664 | StyleDominantBaseline baseline = aNextFrame->StyleSVG()->mDominantBaseline; |
1665 | mBaselines.AppendElement(baseline); |
1666 | } |
1667 | |
1668 | void TextFrameIterator::PopBaseline() { |
1669 | NS_ASSERTION(!mBaselines.IsEmpty(), "popped too many baselines")do { if (!(!mBaselines.IsEmpty())) { NS_DebugBreak(NS_DEBUG_ASSERTION , "popped too many baselines", "!mBaselines.IsEmpty()", "/var/lib/jenkins/workspace/firefox-scan-build/layout/svg/SVGTextFrame.cpp" , 1669); MOZ_PretendNoReturn(); } } while (0); |
1670 | mBaselines.RemoveLastElement(); |
1671 | } |
1672 | |
1673 | // ----------------------------------------------------------------------------- |
1674 | // TextRenderedRunIterator |
1675 | |
1676 | /** |
1677 | * Iterator for TextRenderedRun objects for the SVGTextFrame. |
1678 | */ |
1679 | class TextRenderedRunIterator { |
1680 | public: |
1681 | /** |
1682 | * Values for the aFilter argument of the constructor, to indicate which |
1683 | * frames we should be limited to iterating TextRenderedRun objects for. |
1684 | */ |
1685 | enum RenderedRunFilter { |
1686 | // Iterate TextRenderedRuns for all nsTextFrames. |
1687 | eAllFrames, |
1688 | // Iterate only TextRenderedRuns for nsTextFrames that are |
1689 | // visibility:visible. |
1690 | eVisibleFrames |
1691 | }; |
1692 | |
1693 | /** |
1694 | * Constructs a TextRenderedRunIterator with an optional frame subtree to |
1695 | * restrict iterated rendered runs to. |
1696 | * |
1697 | * @param aSVGTextFrame The SVGTextFrame whose rendered runs to iterate |
1698 | * through. |
1699 | * @param aFilter Indicates whether to iterate rendered runs for non-visible |
1700 | * nsTextFrames. |
1701 | * @param aSubtree An optional frame subtree to restrict iterated rendered |
1702 | * runs to. |
1703 | */ |
1704 | explicit TextRenderedRunIterator(SVGTextFrame* aSVGTextFrame, |
1705 | RenderedRunFilter aFilter = eAllFrames, |
1706 | const nsIFrame* aSubtree = nullptr) |
1707 | : mFrameIterator(FrameIfAnonymousChildReflowed(aSVGTextFrame), aSubtree), |
1708 | mFilter(aFilter), |
1709 | mTextElementCharIndex(0), |
1710 | mFrameStartTextElementCharIndex(0), |
1711 | mFontSizeScaleFactor(aSVGTextFrame->mFontSizeScaleFactor), |
1712 | mCurrent(First()) {} |
1713 | |
1714 | /** |
1715 | * Constructs a TextRenderedRunIterator with a content subtree to restrict |
1716 | * iterated rendered runs to. |
1717 | * |
1718 | * @param aSVGTextFrame The SVGTextFrame whose rendered runs to iterate |
1719 | * through. |
1720 | * @param aFilter Indicates whether to iterate rendered runs for non-visible |
1721 | * nsTextFrames. |
1722 | * @param aSubtree A content subtree to restrict iterated rendered runs to. |
1723 | */ |
1724 | TextRenderedRunIterator(SVGTextFrame* aSVGTextFrame, |
1725 | RenderedRunFilter aFilter, nsIContent* aSubtree) |
1726 | : mFrameIterator(FrameIfAnonymousChildReflowed(aSVGTextFrame), aSubtree), |
1727 | mFilter(aFilter), |
1728 | mTextElementCharIndex(0), |
1729 | mFrameStartTextElementCharIndex(0), |
1730 | mFontSizeScaleFactor(aSVGTextFrame->mFontSizeScaleFactor), |
1731 | mCurrent(First()) {} |
1732 | |
1733 | /** |
1734 | * Returns the current TextRenderedRun. |
1735 | */ |
1736 | TextRenderedRun Current() const { return mCurrent; } |
1737 | |
1738 | /** |
1739 | * Advances to the next TextRenderedRun and returns it. |
1740 | */ |
1741 | TextRenderedRun Next(); |
1742 | |
1743 | private: |
1744 | /** |
1745 | * Returns the root SVGTextFrame this iterator is for. |
1746 | */ |
1747 | SVGTextFrame* Root() const { return mFrameIterator.Root(); } |
1748 | |
1749 | /** |
1750 | * Advances to the first TextRenderedRun and returns it. |
1751 | */ |
1752 | TextRenderedRun First(); |
1753 | |
1754 | /** |
1755 | * The frame iterator to use. |
1756 | */ |
1757 | TextFrameIterator mFrameIterator; |
1758 | |
1759 | /** |
1760 | * The filter indicating which TextRenderedRuns to return. |
1761 | */ |
1762 | RenderedRunFilter mFilter; |
1763 | |
1764 | /** |
1765 | * The character index across the entire <text> element we are currently |
1766 | * up to. |
1767 | */ |
1768 | uint32_t mTextElementCharIndex; |
1769 | |
1770 | /** |
1771 | * The character index across the entire <text> for the start of the current |
1772 | * frame. |
1773 | */ |
1774 | uint32_t mFrameStartTextElementCharIndex; |
1775 | |
1776 | /** |
1777 | * The font-size scale factor we used when constructing the nsTextFrames. |
1778 | */ |
1779 | double mFontSizeScaleFactor; |
1780 | |
1781 | /** |
1782 | * The current TextRenderedRun. |
1783 | */ |
1784 | TextRenderedRun mCurrent; |
1785 | }; |
1786 | |
1787 | TextRenderedRun TextRenderedRunIterator::Next() { |
1788 | if (!mFrameIterator.Current()) { |
1789 | // If there are no more frames, then there are no more rendered runs to |
1790 | // return. |
1791 | mCurrent = TextRenderedRun(); |
1792 | return mCurrent; |
1793 | } |
1794 | |
1795 | // The values we will use to initialize the TextRenderedRun with. |
1796 | nsTextFrame* frame; |
1797 | gfxPoint pt; |
1798 | double rotate; |
1799 | nscoord baseline; |
1800 | uint32_t offset, length; |
1801 | uint32_t charIndex; |
1802 | |
1803 | // We loop, because we want to skip over rendered runs that either aren't |
1804 | // within our subtree of interest, because they don't match the filter, |
1805 | // or because they are hidden due to having fallen off the end of a |
1806 | // <textPath>. |
1807 | for (;;) { |
1808 | if (mFrameIterator.IsAfterSubtree()) { |
1809 | mCurrent = TextRenderedRun(); |
1810 | return mCurrent; |
1811 | } |
1812 | |
1813 | frame = mFrameIterator.Current(); |
1814 | |
1815 | charIndex = mTextElementCharIndex; |
1816 | |
1817 | // Find the end of the rendered run, by looking through the |
1818 | // SVGTextFrame's positions array until we find one that is recorded |
1819 | // as a run boundary. |
1820 | uint32_t runStart, |
1821 | runEnd; // XXX Replace runStart with mTextElementCharIndex. |
1822 | runStart = mTextElementCharIndex; |
1823 | runEnd = runStart + 1; |
1824 | while (runEnd < Root()->mPositions.Length() && |
1825 | !Root()->mPositions[runEnd].mRunBoundary) { |
1826 | runEnd++; |
1827 | } |
1828 | |
1829 | // Convert the global run start/end indexes into an offset/length into the |
1830 | // current frame's Text. |
1831 | offset = |
1832 | frame->GetContentOffset() + runStart - mFrameStartTextElementCharIndex; |
1833 | length = runEnd - runStart; |
1834 | |
1835 | // If the end of the frame's content comes before the run boundary we found |
1836 | // in SVGTextFrame's position array, we need to shorten the rendered run. |
1837 | uint32_t contentEnd = frame->GetContentEnd(); |
1838 | if (offset + length > contentEnd) { |
1839 | length = contentEnd - offset; |
1840 | } |
1841 | |
1842 | NS_ASSERTION(offset >= uint32_t(frame->GetContentOffset()),do { if (!(offset >= uint32_t(frame->GetContentOffset() ))) { NS_DebugBreak(NS_DEBUG_ASSERTION, "invalid offset", "offset >= uint32_t(frame->GetContentOffset())" , "/var/lib/jenkins/workspace/firefox-scan-build/layout/svg/SVGTextFrame.cpp" , 1843); MOZ_PretendNoReturn(); } } while (0) |
1843 | "invalid offset")do { if (!(offset >= uint32_t(frame->GetContentOffset() ))) { NS_DebugBreak(NS_DEBUG_ASSERTION, "invalid offset", "offset >= uint32_t(frame->GetContentOffset())" , "/var/lib/jenkins/workspace/firefox-scan-build/layout/svg/SVGTextFrame.cpp" , 1843); MOZ_PretendNoReturn(); } } while (0); |
1844 | NS_ASSERTION(offset + length <= contentEnd, "invalid offset or length")do { if (!(offset + length <= contentEnd)) { NS_DebugBreak (NS_DEBUG_ASSERTION, "invalid offset or length", "offset + length <= contentEnd" , "/var/lib/jenkins/workspace/firefox-scan-build/layout/svg/SVGTextFrame.cpp" , 1844); MOZ_PretendNoReturn(); } } while (0); |
1845 | |
1846 | // Get the frame's baseline position. |
1847 | frame->EnsureTextRun(nsTextFrame::eInflated); |
1848 | baseline = GetBaselinePosition( |
1849 | frame, frame->GetTextRun(nsTextFrame::eInflated), |
1850 | mFrameIterator.DominantBaseline(), mFontSizeScaleFactor); |
1851 | |
1852 | // Trim the offset/length to remove any leading/trailing white space. |
1853 | uint32_t untrimmedOffset = offset; |
1854 | uint32_t untrimmedLength = length; |
1855 | nsTextFrame::TrimmedOffsets trimmedOffsets = |
1856 | frame->GetTrimmedOffsets(frame->TextFragment()); |
1857 | TrimOffsets(offset, length, trimmedOffsets); |
1858 | charIndex += offset - untrimmedOffset; |
1859 | |
1860 | // Get the position and rotation of the character that begins this |
1861 | // rendered run. |
1862 | pt = Root()->mPositions[charIndex].mPosition; |
1863 | rotate = Root()->mPositions[charIndex].mAngle; |
1864 | |
1865 | // Determine if we should skip this rendered run. |
1866 | bool skip = !mFrameIterator.IsWithinSubtree() || |
1867 | Root()->mPositions[mTextElementCharIndex].mHidden; |
1868 | if (mFilter == eVisibleFrames) { |
1869 | skip = skip || !frame->StyleVisibility()->IsVisible(); |
1870 | } |
1871 | |
1872 | // Update our global character index to move past the characters |
1873 | // corresponding to this rendered run. |
1874 | mTextElementCharIndex += untrimmedLength; |
1875 | |
1876 | // If we have moved past the end of the current frame's content, we need to |
1877 | // advance to the next frame. |
1878 | if (offset + untrimmedLength >= contentEnd) { |
1879 | mFrameIterator.Next(); |
1880 | mTextElementCharIndex += mFrameIterator.UndisplayedCharacters(); |
1881 | mFrameStartTextElementCharIndex = mTextElementCharIndex; |
1882 | } |
1883 | |
1884 | if (!mFrameIterator.Current()) { |
1885 | if (skip) { |
1886 | // That was the last frame, and we skipped this rendered run. So we |
1887 | // have no rendered run to return. |
1888 | mCurrent = TextRenderedRun(); |
1889 | return mCurrent; |
1890 | } |
1891 | break; |
1892 | } |
1893 | |
1894 | if (length && !skip) { |
1895 | // Only return a rendered run if it didn't get collapsed away entirely |
1896 | // (due to it being all white space) and if we don't want to skip it. |
1897 | break; |
1898 | } |
1899 | } |
1900 | |
1901 | mCurrent = TextRenderedRun(frame, pt, Root()->mLengthAdjustScaleFactor, |
1902 | rotate, mFontSizeScaleFactor, baseline, offset, |
1903 | length, charIndex); |
1904 | return mCurrent; |
1905 | } |
1906 | |
1907 | TextRenderedRun TextRenderedRunIterator::First() { |
1908 | if (!mFrameIterator.Current()) { |
1909 | return TextRenderedRun(); |
1910 | } |
1911 | |
1912 | if (Root()->mPositions.IsEmpty()) { |
1913 | mFrameIterator.Close(); |
1914 | return TextRenderedRun(); |
1915 | } |
1916 | |
1917 | // Get the character index for the start of this rendered run, by skipping |
1918 | // any undisplayed characters. |
1919 | mTextElementCharIndex = mFrameIterator.UndisplayedCharacters(); |
1920 | mFrameStartTextElementCharIndex = mTextElementCharIndex; |
1921 | |
1922 | return Next(); |
1923 | } |
1924 | |
1925 | // ----------------------------------------------------------------------------- |
1926 | // CharIterator |
1927 | |
1928 | /** |
1929 | * Iterator for characters within an SVGTextFrame. |
1930 | */ |
1931 | class MOZ_STACK_CLASS CharIterator { |
1932 | using Range = gfxTextRun::Range; |
1933 | |
1934 | public: |
1935 | /** |
1936 | * Values for the aFilter argument of the constructor, to indicate which |
1937 | * characters we should be iterating over. |
1938 | */ |
1939 | enum CharacterFilter { |
1940 | // Iterate over all original characters from the DOM that are within valid |
1941 | // text content elements. |
1942 | eOriginal, |
1943 | // Iterate only over characters that are not skipped characters. |
1944 | eUnskipped, |
1945 | // Iterate only over characters that are addressable by the positioning |
1946 | // attributes x="", y="", etc. This includes all characters after |
1947 | // collapsing white space as required by the value of 'white-space'. |
1948 | eAddressable, |
1949 | }; |
1950 | |
1951 | /** |
1952 | * Constructs a CharIterator. |
1953 | * |
1954 | * @param aSVGTextFrame The SVGTextFrame whose characters to iterate |
1955 | * through. |
1956 | * @param aFilter Indicates which characters to iterate over. |
1957 | * @param aSubtree A content subtree to track whether the current character |
1958 | * is within. |
1959 | */ |
1960 | CharIterator(SVGTextFrame* aSVGTextFrame, CharacterFilter aFilter, |
1961 | nsIContent* aSubtree, bool aPostReflow = true); |
1962 | |
1963 | /** |
1964 | * Returns whether the iterator is finished. |
1965 | */ |
1966 | bool AtEnd() const { return !mFrameIterator.Current(); } |
1967 | |
1968 | /** |
1969 | * Advances to the next matching character. Returns true if there was a |
1970 | * character to advance to, and false otherwise. |
1971 | */ |
1972 | bool Next(); |
1973 | |
1974 | /** |
1975 | * Advances ahead aCount matching characters. Returns true if there were |
1976 | * enough characters to advance past, and false otherwise. |
1977 | */ |
1978 | bool Next(uint32_t aCount); |
1979 | |
1980 | /** |
1981 | * Advances ahead up to aCount matching characters. |
1982 | */ |
1983 | void NextWithinSubtree(uint32_t aCount); |
1984 | |
1985 | /** |
1986 | * Advances to the character with the specified index. The index is in the |
1987 | * space of original characters (i.e., all DOM characters under the <text> |
1988 | * that are within valid text content elements). |
1989 | */ |
1990 | bool AdvanceToCharacter(uint32_t aTextElementCharIndex); |
1991 | |
1992 | /** |
1993 | * Advances to the first matching character after the current nsTextFrame. |
1994 | */ |
1995 | bool AdvancePastCurrentFrame(); |
1996 | |
1997 | /** |
1998 | * Advances to the first matching character after the frames within |
1999 | * the current <textPath>. |
2000 | */ |
2001 | bool AdvancePastCurrentTextPathFrame(); |
2002 | |
2003 | /** |
2004 | * Advances to the first matching character of the subtree. Returns true |
2005 | * if we successfully advance to the subtree, or if we are already within |
2006 | * the subtree. Returns false if we are past the subtree. |
2007 | */ |
2008 | bool AdvanceToSubtree(); |
2009 | |
2010 | /** |
2011 | * Returns the nsTextFrame for the current character. |
2012 | */ |
2013 | nsTextFrame* TextFrame() const { return mFrameIterator.Current(); } |
2014 | |
2015 | /** |
2016 | * Returns whether the iterator is within the subtree. |
2017 | */ |
2018 | bool IsWithinSubtree() const { return mFrameIterator.IsWithinSubtree(); } |
2019 | |
2020 | /** |
2021 | * Returns whether the iterator is past the subtree. |
2022 | */ |
2023 | bool IsAfterSubtree() const { return mFrameIterator.IsAfterSubtree(); } |
2024 | |
2025 | /** |
2026 | * Returns whether the current character is a skipped character. |
2027 | */ |
2028 | bool IsOriginalCharSkipped() const { |
2029 | return mSkipCharsIterator.IsOriginalCharSkipped(); |
2030 | } |
2031 | |
2032 | /** |
2033 | * Returns whether the current character is the start of a cluster and |
2034 | * ligature group. |
2035 | */ |
2036 | bool IsClusterAndLigatureGroupStart() const { |
2037 | return mTextRun->IsLigatureGroupStart( |
2038 | mSkipCharsIterator.GetSkippedOffset()) && |
2039 | mTextRun->IsClusterStart(mSkipCharsIterator.GetSkippedOffset()); |
2040 | } |
2041 | |
2042 | /** |
2043 | * Returns the glyph run for the current character. |
2044 | */ |
2045 | const gfxTextRun::GlyphRun& GlyphRun() const { |
2046 | return *mTextRun->FindFirstGlyphRunContaining( |
2047 | mSkipCharsIterator.GetSkippedOffset()); |
2048 | } |
2049 | |
2050 | /** |
2051 | * Returns whether the current character is trimmed away when painting, |
2052 | * due to it being leading/trailing white space. |
2053 | */ |
2054 | bool IsOriginalCharTrimmed() const; |
2055 | |
2056 | /** |
2057 | * Returns whether the current character is unaddressable from the SVG glyph |
2058 | * positioning attributes. |
2059 | */ |
2060 | bool IsOriginalCharUnaddressable() const { |
2061 | return IsOriginalCharSkipped() || IsOriginalCharTrimmed(); |
2062 | } |
2063 | |
2064 | /** |
2065 | * Returns the text run for the current character. |
2066 | */ |
2067 | gfxTextRun* TextRun() const { return mTextRun; } |
2068 | |
2069 | /** |
2070 | * Returns the current character index. |
2071 | */ |
2072 | uint32_t TextElementCharIndex() const { return mTextElementCharIndex; } |
2073 | |
2074 | /** |
2075 | * Returns the character index for the start of the cluster/ligature group it |
2076 | * is part of. |
2077 | */ |
2078 | uint32_t GlyphStartTextElementCharIndex() const { |
2079 | return mGlyphStartTextElementCharIndex; |
2080 | } |
2081 | |
2082 | /** |
2083 | * Gets the advance, in user units, of the current character. If the |
2084 | * character is a part of ligature, then the advance returned will be |
2085 | * a fraction of the ligature glyph's advance. |
2086 | * |
2087 | * @param aContext The context to use for unit conversions. |
2088 | */ |
2089 | gfxFloat GetAdvance(nsPresContext* aContext) const; |
2090 | |
2091 | /** |
2092 | * Returns the frame corresponding to the <textPath> that the current |
2093 | * character is within. |
2094 | */ |
2095 | nsIFrame* TextPathFrame() const { return mFrameIterator.TextPathFrame(); } |
2096 | |
2097 | #ifdef DEBUG1 |
2098 | /** |
2099 | * Returns the subtree we were constructed with. |
2100 | */ |
2101 | nsIContent* GetSubtree() const { return mSubtree; } |
2102 | |
2103 | /** |
2104 | * Returns the CharacterFilter mode in use. |
2105 | */ |
2106 | CharacterFilter Filter() const { return mFilter; } |
2107 | #endif |
2108 | |
2109 | private: |
2110 | /** |
2111 | * Advances to the next character without checking it against the filter. |
2112 | * Returns true if there was a next character to advance to, or false |
2113 | * otherwise. |
2114 | */ |
2115 | bool NextCharacter(); |
2116 | |
2117 | /** |
2118 | * Returns whether the current character matches the filter. |
2119 | */ |
2120 | bool MatchesFilter() const; |
2121 | |
2122 | /** |
2123 | * If this is the start of a glyph, record it. |
2124 | */ |
2125 | void UpdateGlyphStartTextElementCharIndex() { |
2126 | if (!IsOriginalCharSkipped() && IsClusterAndLigatureGroupStart()) { |
2127 | mGlyphStartTextElementCharIndex = mTextElementCharIndex; |
2128 | } |
2129 | } |
2130 | |
2131 | /** |
2132 | * The filter to use. |
2133 | */ |
2134 | CharacterFilter mFilter; |
2135 | |
2136 | /** |
2137 | * The iterator for text frames. |
2138 | */ |
2139 | TextFrameIterator mFrameIterator; |
2140 | |
2141 | #ifdef DEBUG1 |
2142 | /** |
2143 | * The subtree we were constructed with. |
2144 | */ |
2145 | nsIContent* const mSubtree; |
2146 | #endif |
2147 | |
2148 | /** |
2149 | * A gfxSkipCharsIterator for the text frame the current character is |
2150 | * a part of. |
2151 | */ |
2152 | gfxSkipCharsIterator mSkipCharsIterator; |
2153 | |
2154 | // Cache for information computed by IsOriginalCharTrimmed. |
2155 | mutable nsTextFrame* mFrameForTrimCheck; |
2156 | mutable uint32_t mTrimmedOffset; |
2157 | mutable uint32_t mTrimmedLength; |
2158 | |
2159 | /** |
2160 | * The text run the current character is a part of. |
2161 | */ |
2162 | gfxTextRun* mTextRun; |
2163 | |
2164 | /** |
2165 | * The current character's index. |
2166 | */ |
2167 | uint32_t mTextElementCharIndex; |
2168 | |
2169 | /** |
2170 | * The index of the character that starts the cluster/ligature group the |
2171 | * current character is a part of. |
2172 | */ |
2173 | uint32_t mGlyphStartTextElementCharIndex; |
2174 | |
2175 | /** |
2176 | * The scale factor to apply to glyph advances returned by |
2177 | * GetAdvance etc. to take into account textLength="". |
2178 | */ |
2179 | float mLengthAdjustScaleFactor; |
2180 | |
2181 | /** |
2182 | * Whether the instance of this class is being used after reflow has occurred |
2183 | * or not. |
2184 | */ |
2185 | bool mPostReflow; |
2186 | }; |
2187 | |
2188 | CharIterator::CharIterator(SVGTextFrame* aSVGTextFrame, |
2189 | CharIterator::CharacterFilter aFilter, |
2190 | nsIContent* aSubtree, bool aPostReflow) |
2191 | : mFilter(aFilter), |
2192 | mFrameIterator(aSVGTextFrame, aSubtree), |
2193 | #ifdef DEBUG1 |
2194 | mSubtree(aSubtree), |
2195 | #endif |
2196 | mFrameForTrimCheck(nullptr), |
2197 | mTrimmedOffset(0), |
2198 | mTrimmedLength(0), |
2199 | mTextRun(nullptr), |
2200 | mTextElementCharIndex(0), |
2201 | mGlyphStartTextElementCharIndex(0), |
2202 | mLengthAdjustScaleFactor(aSVGTextFrame->mLengthAdjustScaleFactor), |
2203 | mPostReflow(aPostReflow) { |
2204 | if (!AtEnd()) { |
2205 | mSkipCharsIterator = TextFrame()->EnsureTextRun(nsTextFrame::eInflated); |
2206 | mTextRun = TextFrame()->GetTextRun(nsTextFrame::eInflated); |
2207 | mTextElementCharIndex = mFrameIterator.UndisplayedCharacters(); |
2208 | UpdateGlyphStartTextElementCharIndex(); |
2209 | if (!MatchesFilter()) { |
2210 | Next(); |
2211 | } |
2212 | } |
2213 | } |
2214 | |
2215 | bool CharIterator::Next() { |
2216 | while (NextCharacter()) { |
2217 | if (MatchesFilter()) { |
2218 | return true; |
2219 | } |
2220 | } |
2221 | return false; |
2222 | } |
2223 | |
2224 | bool CharIterator::Next(uint32_t aCount) { |
2225 | if (aCount == 0 && AtEnd()) { |
2226 | return false; |
2227 | } |
2228 | while (aCount) { |
2229 | if (!Next()) { |
2230 | return false; |
2231 | } |
2232 | aCount--; |
2233 | } |
2234 | return true; |
2235 | } |
2236 | |
2237 | void CharIterator::NextWithinSubtree(uint32_t aCount) { |
2238 | while (IsWithinSubtree() && aCount) { |
2239 | --aCount; |
2240 | if (!Next()) { |
2241 | return; |
2242 | } |
2243 | } |
2244 | } |
2245 | |
2246 | bool CharIterator::AdvanceToCharacter(uint32_t aTextElementCharIndex) { |
2247 | while (mTextElementCharIndex < aTextElementCharIndex) { |
2248 | if (!Next()) { |
2249 | return false; |
2250 | } |
2251 | } |
2252 | return true; |
2253 | } |
2254 | |
2255 | bool CharIterator::AdvancePastCurrentFrame() { |
2256 | // XXX Can do this better than one character at a time if it matters. |
2257 | nsTextFrame* currentFrame = TextFrame(); |
2258 | do { |
2259 | if (!Next()) { |
2260 | return false; |
2261 | } |
2262 | } while (TextFrame() == currentFrame); |
2263 | return true; |
2264 | } |
2265 | |
2266 | bool CharIterator::AdvancePastCurrentTextPathFrame() { |
2267 | nsIFrame* currentTextPathFrame = TextPathFrame(); |
2268 | NS_ASSERTION(currentTextPathFrame,do { if (!(currentTextPathFrame)) { NS_DebugBreak(NS_DEBUG_ASSERTION , "expected AdvancePastCurrentTextPathFrame to be called only " "within a text path frame", "currentTextPathFrame", "/var/lib/jenkins/workspace/firefox-scan-build/layout/svg/SVGTextFrame.cpp" , 2270); MOZ_PretendNoReturn(); } } while (0) |
2269 | "expected AdvancePastCurrentTextPathFrame to be called only "do { if (!(currentTextPathFrame)) { NS_DebugBreak(NS_DEBUG_ASSERTION , "expected AdvancePastCurrentTextPathFrame to be called only " "within a text path frame", "currentTextPathFrame", "/var/lib/jenkins/workspace/firefox-scan-build/layout/svg/SVGTextFrame.cpp" , 2270); MOZ_PretendNoReturn(); } } while (0) |
2270 | "within a text path frame")do { if (!(currentTextPathFrame)) { NS_DebugBreak(NS_DEBUG_ASSERTION , "expected AdvancePastCurrentTextPathFrame to be called only " "within a text path frame", "currentTextPathFrame", "/var/lib/jenkins/workspace/firefox-scan-build/layout/svg/SVGTextFrame.cpp" , 2270); MOZ_PretendNoReturn(); } } while (0); |
2271 | do { |
2272 | if (!AdvancePastCurrentFrame()) { |
2273 | return false; |
2274 | } |
2275 | } while (TextPathFrame() == currentTextPathFrame); |
2276 | return true; |
2277 | } |
2278 | |
2279 | bool CharIterator::AdvanceToSubtree() { |
2280 | while (!IsWithinSubtree()) { |
2281 | if (IsAfterSubtree()) { |
2282 | return false; |
2283 | } |
2284 | if (!AdvancePastCurrentFrame()) { |
2285 | return false; |
2286 | } |
2287 | } |
2288 | return true; |
2289 | } |
2290 | |
2291 | bool CharIterator::IsOriginalCharTrimmed() const { |
2292 | if (mFrameForTrimCheck != TextFrame()) { |
2293 | // Since we do a lot of trim checking, we cache the trimmed offsets and |
2294 | // lengths while we are in the same frame. |
2295 | mFrameForTrimCheck = TextFrame(); |
2296 | uint32_t offset = mFrameForTrimCheck->GetContentOffset(); |
2297 | uint32_t length = mFrameForTrimCheck->GetContentLength(); |
2298 | nsTextFrame::TrimmedOffsets trim = mFrameForTrimCheck->GetTrimmedOffsets( |
2299 | mFrameForTrimCheck->TextFragment(), |
2300 | (mPostReflow ? nsTextFrame::TrimmedOffsetFlags::Default |
2301 | : nsTextFrame::TrimmedOffsetFlags::NotPostReflow)); |
2302 | TrimOffsets(offset, length, trim); |
2303 | mTrimmedOffset = offset; |
2304 | mTrimmedLength = length; |
2305 | } |
2306 | |
2307 | // A character is trimmed if it is outside the mTrimmedOffset/mTrimmedLength |
2308 | // range and it is not a significant newline character. |
2309 | uint32_t index = mSkipCharsIterator.GetOriginalOffset(); |
2310 | return !( |
2311 | (index >= mTrimmedOffset && index < mTrimmedOffset + mTrimmedLength) || |
2312 | (index >= mTrimmedOffset + mTrimmedLength && |
2313 | mFrameForTrimCheck->StyleText()->NewlineIsSignificant( |
2314 | mFrameForTrimCheck) && |
2315 | mFrameForTrimCheck->TextFragment()->CharAt(index) == '\n')); |
2316 | } |
2317 | |
2318 | gfxFloat CharIterator::GetAdvance(nsPresContext* aContext) const { |
2319 | float cssPxPerDevPx = |
2320 | nsPresContext::AppUnitsToFloatCSSPixels(aContext->AppUnitsPerDevPixel()); |
2321 | |
2322 | gfxSkipCharsIterator start = |
2323 | TextFrame()->EnsureTextRun(nsTextFrame::eInflated); |
2324 | nsTextFrame::PropertyProvider provider(TextFrame(), start); |
2325 | |
2326 | uint32_t offset = mSkipCharsIterator.GetSkippedOffset(); |
2327 | gfxFloat advance = |
2328 | mTextRun->GetAdvanceWidth(Range(offset, offset + 1), &provider); |
2329 | return aContext->AppUnitsToGfxUnits(advance) * mLengthAdjustScaleFactor * |
2330 | cssPxPerDevPx; |
2331 | } |
2332 | |
2333 | bool CharIterator::NextCharacter() { |
2334 | if (AtEnd()) { |
2335 | return false; |
2336 | } |
2337 | |
2338 | mTextElementCharIndex++; |
2339 | |
2340 | // Advance within the current text run. |
2341 | mSkipCharsIterator.AdvanceOriginal(1); |
2342 | if (mSkipCharsIterator.GetOriginalOffset() < TextFrame()->GetContentEnd()) { |
2343 | // We're still within the part of the text run for the current text frame. |
2344 | UpdateGlyphStartTextElementCharIndex(); |
2345 | return true; |
2346 | } |
2347 | |
2348 | // Advance to the next frame. |
2349 | mFrameIterator.Next(); |
2350 | |
2351 | // Skip any undisplayed characters. |
2352 | uint32_t undisplayed = mFrameIterator.UndisplayedCharacters(); |
2353 | mTextElementCharIndex += undisplayed; |
2354 | if (!TextFrame()) { |
2355 | // We're at the end. |
2356 | mSkipCharsIterator = gfxSkipCharsIterator(); |
2357 | return false; |
2358 | } |
2359 | |
2360 | mSkipCharsIterator = TextFrame()->EnsureTextRun(nsTextFrame::eInflated); |
2361 | mTextRun = TextFrame()->GetTextRun(nsTextFrame::eInflated); |
2362 | UpdateGlyphStartTextElementCharIndex(); |
2363 | return true; |
2364 | } |
2365 | |
2366 | bool CharIterator::MatchesFilter() const { |
2367 | switch (mFilter) { |
2368 | case eOriginal: |
2369 | return true; |
2370 | case eUnskipped: |
2371 | return !IsOriginalCharSkipped(); |
2372 | case eAddressable: |
2373 | return !IsOriginalCharSkipped() && !IsOriginalCharUnaddressable(); |
2374 | } |
2375 | MOZ_ASSERT_UNREACHABLE("Invalid mFilter value")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: " "Invalid mFilter value" ")", "/var/lib/jenkins/workspace/firefox-scan-build/layout/svg/SVGTextFrame.cpp" , 2375); AnnotateMozCrashReason("MOZ_ASSERT" "(" "false" ") (" "MOZ_ASSERT_UNREACHABLE: " "Invalid mFilter value" ")"); do { *((volatile int*)__null) = 2375; __attribute__((nomerge)) :: abort(); } while (false); } } while (false); |
2376 | return true; |
2377 | } |
2378 | |
2379 | // ----------------------------------------------------------------------------- |
2380 | // SVGTextDrawPathCallbacks |
2381 | |
2382 | /** |
2383 | * Text frame draw callback class that paints the text and text decoration parts |
2384 | * of an nsTextFrame using SVG painting properties, and selection backgrounds |
2385 | * and decorations as they would normally. |
2386 | * |
2387 | * An instance of this class is passed to nsTextFrame::PaintText if painting |
2388 | * cannot be done directly (e.g. if we are using an SVG pattern fill, stroking |
2389 | * the text, etc.). |
2390 | */ |
2391 | class SVGTextDrawPathCallbacks final : public nsTextFrame::DrawPathCallbacks { |
2392 | using imgDrawingParams = image::imgDrawingParams; |
2393 | |
2394 | public: |
2395 | /** |
2396 | * Constructs an SVGTextDrawPathCallbacks. |
2397 | * |
2398 | * @param aSVGTextFrame The ancestor text frame. |
2399 | * @param aContext The context to use for painting. |
2400 | * @param aFrame The nsTextFrame to paint. |
2401 | * @param aCanvasTM The transformation matrix to set when painting; this |
2402 | * should be the FOR_OUTERSVG_TM canvas TM of the text, so that |
2403 | * paint servers are painted correctly. |
2404 | * @param aImgParams Whether we need to synchronously decode images. |
2405 | * @param aShouldPaintSVGGlyphs Whether SVG glyphs should be painted. |
2406 | */ |
2407 | SVGTextDrawPathCallbacks(SVGTextFrame* aSVGTextFrame, gfxContext& aContext, |
2408 | nsTextFrame* aFrame, const gfxMatrix& aCanvasTM, |
2409 | imgDrawingParams& aImgParams, |
2410 | bool aShouldPaintSVGGlyphs) |
2411 | : DrawPathCallbacks(aShouldPaintSVGGlyphs), |
2412 | mSVGTextFrame(aSVGTextFrame), |
2413 | mContext(aContext), |
2414 | mFrame(aFrame), |
2415 | mCanvasTM(aCanvasTM), |
2416 | mImgParams(aImgParams) {} |
2417 | |
2418 | void NotifySelectionBackgroundNeedsFill(const Rect& aBackgroundRect, |
2419 | nscolor aColor, |
2420 | DrawTarget& aDrawTarget) override; |
2421 | void PaintDecorationLine(Rect aPath, bool aPaintingShadows, |
2422 | nscolor aColor) override; |
2423 | void PaintSelectionDecorationLine(Rect aPath, bool aPaintingShadows, |
2424 | nscolor aColor) override; |
2425 | void NotifyBeforeText(bool aPaintingShadows, nscolor aColor) override; |
2426 | void NotifyGlyphPathEmitted() override; |
2427 | void NotifyAfterText() override; |
2428 | |
2429 | private: |
2430 | void SetupContext(); |
2431 | |
2432 | bool IsClipPathChild() const { |
2433 | return mSVGTextFrame->HasAnyStateBits(NS_STATE_SVG_CLIPPATH_CHILD); |
2434 | } |
2435 | |
2436 | /** |
2437 | * Paints a piece of text geometry. This is called when glyphs |
2438 | * or text decorations have been emitted to the gfxContext. |
2439 | */ |
2440 | void HandleTextGeometry(); |
2441 | |
2442 | /** |
2443 | * Sets the gfxContext paint to the appropriate color or pattern |
2444 | * for filling text geometry. |
2445 | */ |
2446 | void MakeFillPattern(GeneralPattern* aOutPattern); |
2447 | |
2448 | /** |
2449 | * Fills and strokes a piece of text geometry, using group opacity |
2450 | * if the selection style requires it. |
2451 | */ |
2452 | void FillAndStrokeGeometry(); |
2453 | |
2454 | /** |
2455 | * Fills a piece of text geometry. |
2456 | */ |
2457 | void FillGeometry(); |
2458 | |
2459 | /** |
2460 | * Strokes a piece of text geometry. |
2461 | */ |
2462 | void StrokeGeometry(); |
2463 | |
2464 | /* |
2465 | * Takes a colour and modifies it to account for opacity properties. |
2466 | */ |
2467 | void ApplyOpacity(sRGBColor& aColor, const StyleSVGPaint& aPaint, |
2468 | const StyleSVGOpacity& aOpacity) const; |
2469 | |
2470 | SVGTextFrame* const mSVGTextFrame; |
2471 | gfxContext& mContext; |
2472 | nsTextFrame* const mFrame; |
2473 | const gfxMatrix& mCanvasTM; |
2474 | imgDrawingParams& mImgParams; |
2475 | |
2476 | /** |
2477 | * The color that we were last told from one of the path callback functions. |
2478 | * This color can be the special NS_SAME_AS_FOREGROUND_COLOR, |
2479 | * NS_40PERCENT_FOREGROUND_COLOR and NS_TRANSPARENT colors when we are |
2480 | * painting selections or IME decorations. |
2481 | */ |
2482 | nscolor mColor = NS_RGBA(0, 0, 0, 0)((nscolor)(((0) << 24) | ((0) << 16) | ((0) << 8) | (0))); |
2483 | |
2484 | /** |
2485 | * Whether we're painting text shadows. |
2486 | */ |
2487 | bool mPaintingShadows = false; |
2488 | }; |
2489 | |
2490 | void SVGTextDrawPathCallbacks::NotifySelectionBackgroundNeedsFill( |
2491 | const Rect& aBackgroundRect, nscolor aColor, DrawTarget& aDrawTarget) { |
2492 | if (IsClipPathChild()) { |
2493 | // Don't paint selection backgrounds when in a clip path. |
2494 | return; |
2495 | } |
2496 | |
2497 | mColor = aColor; // currently needed by MakeFillPattern |
2498 | mPaintingShadows = false; |
2499 | |
2500 | GeneralPattern fillPattern; |
2501 | MakeFillPattern(&fillPattern); |
2502 | if (fillPattern.GetPattern()) { |
2503 | DrawOptions drawOptions(aColor == NS_40PERCENT_FOREGROUND_COLOR ? 0.4 |
2504 | : 1.0); |
2505 | aDrawTarget.FillRect(aBackgroundRect, fillPattern, drawOptions); |
2506 | } |
2507 | } |
2508 | |
2509 | void SVGTextDrawPathCallbacks::NotifyBeforeText(bool aPaintingShadows, |
2510 | nscolor aColor) { |
2511 | mColor = aColor; |
2512 | mPaintingShadows = aPaintingShadows; |
2513 | SetupContext(); |
2514 | mContext.NewPath(); |
2515 | } |
2516 | |
2517 | void SVGTextDrawPathCallbacks::NotifyGlyphPathEmitted() { |
2518 | HandleTextGeometry(); |
2519 | mContext.NewPath(); |
2520 | } |
2521 | |
2522 | void SVGTextDrawPathCallbacks::NotifyAfterText() { mContext.Restore(); } |
2523 | |
2524 | void SVGTextDrawPathCallbacks::PaintDecorationLine(Rect aPath, |
2525 | bool aPaintingShadows, |
2526 | nscolor aColor) { |
2527 | mColor = aColor; |
2528 | mPaintingShadows = aPaintingShadows; |
2529 | AntialiasMode aaMode = |
2530 | SVGUtils::ToAntialiasMode(mFrame->StyleText()->mTextRendering); |
2531 | |
2532 | mContext.Save(); |
2533 | mContext.NewPath(); |
2534 | mContext.SetAntialiasMode(aaMode); |
2535 | mContext.Rectangle(ThebesRect(aPath)); |
2536 | HandleTextGeometry(); |
2537 | mContext.NewPath(); |
2538 | mContext.Restore(); |
2539 | } |
2540 | |
2541 | void SVGTextDrawPathCallbacks::PaintSelectionDecorationLine( |
2542 | Rect aPath, bool aPaintingShadows, nscolor aColor) { |
2543 | if (IsClipPathChild()) { |
2544 | // Don't paint selection decorations when in a clip path. |
2545 | return; |
2546 | } |
2547 | |
2548 | mColor = aColor; |
2549 | mPaintingShadows = aPaintingShadows; |
2550 | |
2551 | mContext.Save(); |
2552 | mContext.NewPath(); |
2553 | mContext.Rectangle(ThebesRect(aPath)); |
2554 | FillAndStrokeGeometry(); |
2555 | mContext.Restore(); |
2556 | } |
2557 | |
2558 | void SVGTextDrawPathCallbacks::SetupContext() { |
2559 | mContext.Save(); |
2560 | |
2561 | // XXX This is copied from nsSVGGlyphFrame::Render, but cairo doesn't actually |
2562 | // seem to do anything with the antialias mode. So we can perhaps remove it, |
2563 | // or make SetAntialiasMode set cairo text antialiasing too. |
2564 | mContext.SetAntialiasMode( |
2565 | SVGUtils::ToAntialiasMode(mFrame->StyleText()->mTextRendering)); |
2566 | } |
2567 | |
2568 | void SVGTextDrawPathCallbacks::HandleTextGeometry() { |
2569 | if (IsClipPathChild()) { |
2570 | RefPtr<Path> path = mContext.GetPath(); |
2571 | ColorPattern white( |
2572 | DeviceColor(1.f, 1.f, 1.f, 1.f)); // for masking, so no ToDeviceColor |
2573 | mContext.GetDrawTarget()->Fill(path, white); |
2574 | } else { |
2575 | // Normal painting. |
2576 | gfxContextMatrixAutoSaveRestore saveMatrix(&mContext); |
2577 | mContext.SetMatrixDouble(mCanvasTM); |
2578 | |
2579 | FillAndStrokeGeometry(); |
2580 | } |
2581 | } |
2582 | |
2583 | void SVGTextDrawPathCallbacks::ApplyOpacity( |
2584 | sRGBColor& aColor, const StyleSVGPaint& aPaint, |
2585 | const StyleSVGOpacity& aOpacity) const { |
2586 | if (aPaint.kind.tag == StyleSVGPaintKind::Tag::Color) { |
2587 | aColor.a *= |
2588 | sRGBColor::FromABGR(aPaint.kind.AsColor().CalcColor(*mFrame->Style())) |
2589 | .a; |
2590 | } |
2591 | aColor.a *= SVGUtils::GetOpacity(aOpacity, /*aContextPaint*/ nullptr); |
2592 | } |
2593 | |
2594 | void SVGTextDrawPathCallbacks::MakeFillPattern(GeneralPattern* aOutPattern) { |
2595 | if (mColor == NS_SAME_AS_FOREGROUND_COLOR || |
2596 | mColor == NS_40PERCENT_FOREGROUND_COLOR) { |
2597 | SVGUtils::MakeFillPatternFor(mFrame, &mContext, aOutPattern, mImgParams); |
2598 | return; |
2599 | } |
2600 | |
2601 | if (mColor == NS_TRANSPARENT) { |
2602 | return; |
2603 | } |
2604 | |
2605 | sRGBColor color(sRGBColor::FromABGR(mColor)); |
2606 | if (mPaintingShadows) { |
2607 | ApplyOpacity(color, mFrame->StyleSVG()->mFill, |
2608 | mFrame->StyleSVG()->mFillOpacity); |
2609 | } |
2610 | aOutPattern->InitColorPattern(ToDeviceColor(color)); |
2611 | } |
2612 | |
2613 | void SVGTextDrawPathCallbacks::FillAndStrokeGeometry() { |
2614 | gfxGroupForBlendAutoSaveRestore autoGroupForBlend(&mContext); |
2615 | if (mColor == NS_40PERCENT_FOREGROUND_COLOR) { |
2616 | autoGroupForBlend.PushGroupForBlendBack(gfxContentType::COLOR_ALPHA, 0.4f); |
2617 | } |
2618 | |
2619 | uint32_t paintOrder = mFrame->StyleSVG()->mPaintOrder; |
2620 | if (!paintOrder) { |
2621 | FillGeometry(); |
2622 | StrokeGeometry(); |
2623 | } else { |
2624 | while (paintOrder) { |
2625 | auto component = StylePaintOrder(paintOrder & kPaintOrderMask); |
2626 | switch (component) { |
2627 | case StylePaintOrder::Fill: |
2628 | FillGeometry(); |
2629 | break; |
2630 | case StylePaintOrder::Stroke: |
2631 | StrokeGeometry(); |
2632 | break; |
2633 | default: |
2634 | MOZ_FALLTHROUGH_ASSERT("Unknown paint-order value")do { do { } while (false); MOZ_ReportCrash("" "MOZ_FALLTHROUGH_ASSERT: " "Unknown paint-order value", "/var/lib/jenkins/workspace/firefox-scan-build/layout/svg/SVGTextFrame.cpp" , 2634); AnnotateMozCrashReason("MOZ_CRASH(" "MOZ_FALLTHROUGH_ASSERT: " "Unknown paint-order value" ")"); do { *((volatile int*)__null ) = 2634; __attribute__((nomerge)) ::abort(); } while (false) ; } while (false); |
2635 | case StylePaintOrder::Markers: |
2636 | case StylePaintOrder::Normal: |
2637 | break; |
2638 | } |
2639 | paintOrder >>= kPaintOrderShift; |
2640 | } |
2641 | } |
2642 | } |
2643 | |
2644 | void SVGTextDrawPathCallbacks::FillGeometry() { |
2645 | if (mFrame->StyleSVG()->mFill.kind.IsNone()) { |
2646 | return; |
2647 | } |
2648 | GeneralPattern fillPattern; |
2649 | MakeFillPattern(&fillPattern); |
2650 | if (fillPattern.GetPattern()) { |
2651 | RefPtr<Path> path = mContext.GetPath(); |
2652 | FillRule fillRule = SVGUtils::ToFillRule(mFrame->StyleSVG()->mFillRule); |
2653 | if (fillRule != path->GetFillRule()) { |
2654 | RefPtr<PathBuilder> builder = path->CopyToBuilder(fillRule); |
2655 | path = builder->Finish(); |
2656 | } |
2657 | mContext.GetDrawTarget()->Fill(path, fillPattern); |
2658 | } |
2659 | } |
2660 | |
2661 | void SVGTextDrawPathCallbacks::StrokeGeometry() { |
2662 | // We don't paint the stroke when we are filling with a selection color. |
2663 | if (!(mColor == NS_SAME_AS_FOREGROUND_COLOR || |
2664 | mColor == NS_40PERCENT_FOREGROUND_COLOR || mPaintingShadows)) { |
2665 | return; |
2666 | } |
2667 | |
2668 | if (!SVGUtils::HasStroke(mFrame, /*aContextPaint*/ nullptr)) { |
2669 | return; |
2670 | } |
2671 | |
2672 | GeneralPattern strokePattern; |
2673 | if (mPaintingShadows) { |
2674 | sRGBColor color(sRGBColor::FromABGR(mColor)); |
2675 | ApplyOpacity(color, mFrame->StyleSVG()->mStroke, |
2676 | mFrame->StyleSVG()->mStrokeOpacity); |
2677 | strokePattern.InitColorPattern(ToDeviceColor(color)); |
2678 | } else { |
2679 | SVGUtils::MakeStrokePatternFor(mFrame, &mContext, &strokePattern, |
2680 | mImgParams, /*aContextPaint*/ nullptr); |
2681 | } |
2682 | if (strokePattern.GetPattern()) { |
2683 | SVGElement* svgOwner = |
2684 | SVGElement::FromNode(mFrame->GetParent()->GetContent()); |
2685 | |
2686 | // Apply any stroke-specific transform |
2687 | gfxMatrix outerSVGToUser; |
2688 | if (SVGUtils::GetNonScalingStrokeTransform(mFrame, &outerSVGToUser) && |
2689 | outerSVGToUser.Invert()) { |
2690 | mContext.Multiply(outerSVGToUser); |
2691 | } |
2692 | |
2693 | RefPtr<Path> path = mContext.GetPath(); |
2694 | SVGContentUtils::AutoStrokeOptions strokeOptions; |
2695 | SVGContentUtils::GetStrokeOptions(&strokeOptions, svgOwner, mFrame->Style(), |
2696 | /*aContextPaint*/ nullptr); |
2697 | DrawOptions drawOptions; |
2698 | drawOptions.mAntialiasMode = |
2699 | SVGUtils::ToAntialiasMode(mFrame->StyleText()->mTextRendering); |
2700 | mContext.GetDrawTarget()->Stroke(path, strokePattern, strokeOptions); |
2701 | } |
2702 | } |
2703 | |
2704 | // ============================================================================ |
2705 | // SVGTextFrame |
2706 | |
2707 | // ---------------------------------------------------------------------------- |
2708 | // Display list item |
2709 | |
2710 | class DisplaySVGText final : public DisplaySVGItem { |
2711 | public: |
2712 | DisplaySVGText(nsDisplayListBuilder* aBuilder, SVGTextFrame* aFrame) |
2713 | : DisplaySVGItem(aBuilder, aFrame) { |
2714 | MOZ_COUNT_CTOR(DisplaySVGText)do { static_assert(std::is_class_v<DisplaySVGText>, "Token '" "DisplaySVGText" "' is not a class type."); static_assert(!std ::is_base_of<nsISupports, DisplaySVGText>::value, "nsISupports classes don't need to call MOZ_COUNT_CTOR or " "MOZ_COUNT_DTOR");; NS_LogCtor((void*)this, "DisplaySVGText" , sizeof(*this)); } while (0); |
2715 | } |
2716 | |
2717 | MOZ_COUNTED_DTOR_OVERRIDE(DisplaySVGText)~DisplaySVGText() override { do { static_assert(std::is_class_v <DisplaySVGText>, "Token '" "DisplaySVGText" "' is not a class type." ); static_assert(!std::is_base_of<nsISupports, DisplaySVGText >::value, "nsISupports classes don't need to call MOZ_COUNT_CTOR or " "MOZ_COUNT_DTOR");; NS_LogDtor((void*)this, "DisplaySVGText" , sizeof(*this)); } while (0); } |
2718 | |
2719 | NS_DISPLAY_DECL_NAME("DisplaySVGText", TYPE_SVG_TEXT)const char* Name() const override { return "DisplaySVGText"; } constexpr static DisplayItemType ItemType() { return DisplayItemType ::TYPE_SVG_TEXT; } private: void* operator new(size_t aSize, nsDisplayListBuilder * aBuilder) { return aBuilder->Allocate(aSize, DisplayItemType ::TYPE_SVG_TEXT); } template <typename T, typename F, typename ... Args> friend T* mozilla::MakeDisplayItemWithIndex( nsDisplayListBuilder * aBuilder, F* aFrame, const uint16_t aIndex, Args&&... aArgs); public: |
2720 | |
2721 | nsDisplayItemGeometry* AllocateGeometry( |
2722 | nsDisplayListBuilder* aBuilder) override { |
2723 | return new nsDisplayItemGenericGeometry(this, aBuilder); |
2724 | } |
2725 | |
2726 | nsRect GetComponentAlphaBounds( |
2727 | nsDisplayListBuilder* aBuilder) const override { |
2728 | bool snap; |
2729 | return GetBounds(aBuilder, &snap); |
2730 | } |
2731 | }; |
2732 | |
2733 | // --------------------------------------------------------------------- |
2734 | // nsQueryFrame methods |
2735 | |
2736 | NS_QUERYFRAME_HEAD(SVGTextFrame)void* SVGTextFrame ::QueryFrame(FrameIID id) const { switch ( id) { |
2737 | NS_QUERYFRAME_ENTRY(SVGTextFrame)case SVGTextFrame ::kFrameIID: { static_assert( std::is_same_v <SVGTextFrame, SVGTextFrame ::Has_NS_DECL_QUERYFRAME_TARGET >, "SVGTextFrame" " must declare itself as a queryframe target" ); return const_cast<SVGTextFrame*>(static_cast<const SVGTextFrame*>(this)); } |
2738 | NS_QUERYFRAME_TAIL_INHERITING(SVGDisplayContainerFrame)default: break; } return SVGDisplayContainerFrame ::QueryFrame (id); } |
2739 | |
2740 | } // namespace mozilla |
2741 | |
2742 | // --------------------------------------------------------------------- |
2743 | // Implementation |
2744 | |
2745 | nsIFrame* NS_NewSVGTextFrame(mozilla::PresShell* aPresShell, |
2746 | mozilla::ComputedStyle* aStyle) { |
2747 | return new (aPresShell) |
2748 | mozilla::SVGTextFrame(aStyle, aPresShell->GetPresContext()); |
2749 | } |
2750 | |
2751 | namespace mozilla { |
2752 | |
2753 | NS_IMPL_FRAMEARENA_HELPERS(SVGTextFrame)void* SVGTextFrame ::operator new(size_t sz, mozilla::PresShell * aShell) { return aShell->AllocateFrame(nsQueryFrame::SVGTextFrame_id , sz); } |
2754 | |
2755 | // --------------------------------------------------------------------- |
2756 | // nsIFrame methods |
2757 | |
2758 | void SVGTextFrame::Init(nsIContent* aContent, nsContainerFrame* aParent, |
2759 | nsIFrame* aPrevInFlow) { |
2760 | NS_ASSERTION(aContent->IsSVGElement(nsGkAtoms::text),do { if (!(aContent->IsSVGElement(nsGkAtoms::text))) { NS_DebugBreak (NS_DEBUG_ASSERTION, "Content is not an SVG text", "aContent->IsSVGElement(nsGkAtoms::text)" , "/var/lib/jenkins/workspace/firefox-scan-build/layout/svg/SVGTextFrame.cpp" , 2761); MOZ_PretendNoReturn(); } } while (0) |
2761 | "Content is not an SVG text")do { if (!(aContent->IsSVGElement(nsGkAtoms::text))) { NS_DebugBreak (NS_DEBUG_ASSERTION, "Content is not an SVG text", "aContent->IsSVGElement(nsGkAtoms::text)" , "/var/lib/jenkins/workspace/firefox-scan-build/layout/svg/SVGTextFrame.cpp" , 2761); MOZ_PretendNoReturn(); } } while (0); |
2762 | |
2763 | SVGDisplayContainerFrame::Init(aContent, aParent, aPrevInFlow); |
2764 | AddStateBits(aParent->GetStateBits() & NS_STATE_SVG_CLIPPATH_CHILD); |
2765 | |
2766 | mMutationObserver = new MutationObserver(this); |
2767 | |
2768 | if (HasAnyStateBits(NS_FRAME_IS_NONDISPLAY)) { |
2769 | // We're inserting a new <text> element into a non-display context. |
2770 | // Ensure that we get reflowed. |
2771 | ScheduleReflowSVGNonDisplayText( |
2772 | IntrinsicDirty::FrameAncestorsAndDescendants); |
2773 | } |
2774 | } |
2775 | |
2776 | void SVGTextFrame::BuildDisplayList(nsDisplayListBuilder* aBuilder, |
2777 | const nsDisplayListSet& aLists) { |
2778 | if (IsSubtreeDirty()) { |
2779 | // We can sometimes be asked to paint before reflow happens and we |
2780 | // have updated mPositions, etc. In this case, we just avoid |
2781 | // painting. |
2782 | return; |
2783 | } |
2784 | if (!IsVisibleForPainting() && aBuilder->IsForPainting()) { |
2785 | return; |
2786 | } |
2787 | DisplayOutline(aBuilder, aLists); |
2788 | aLists.Content()->AppendNewToTop<DisplaySVGText>(aBuilder, this); |
2789 | } |
2790 | |
2791 | nsresult SVGTextFrame::AttributeChanged(int32_t aNameSpaceID, |
2792 | nsAtom* aAttribute, int32_t aModType) { |
2793 | if (aNameSpaceID != kNameSpaceID_None) { |
2794 | return NS_OK; |
2795 | } |
2796 | |
2797 | if (aAttribute == nsGkAtoms::transform) { |
2798 | // We don't invalidate for transform changes (the layers code does that). |
2799 | // Also note that SVGTransformableElement::GetAttributeChangeHint will |
2800 | // return nsChangeHint_UpdateOverflow for "transform" attribute changes |
2801 | // and cause DoApplyRenderingChangeToTree to make the SchedulePaint call. |
2802 | |
2803 | if (!HasAnyStateBits(NS_FRAME_FIRST_REFLOW) && mCanvasTM && |
2804 | mCanvasTM->IsSingular()) { |
2805 | // We won't have calculated the glyph positions correctly. |
2806 | NotifyGlyphMetricsChange(false); |
2807 | } |
2808 | mCanvasTM = nullptr; |
2809 | } else if (IsGlyphPositioningAttribute(aAttribute) || |
2810 | aAttribute == nsGkAtoms::textLength || |
2811 | aAttribute == nsGkAtoms::lengthAdjust) { |
2812 | NotifyGlyphMetricsChange(false); |
2813 | } |
2814 | |
2815 | return NS_OK; |
2816 | } |
2817 | |
2818 | void SVGTextFrame::ReflowSVGNonDisplayText() { |
2819 | MOZ_ASSERT(SVGUtils::AnyOuterSVGIsCallingReflowSVG(this),do { static_assert( mozilla::detail::AssertionConditionType< decltype(SVGUtils::AnyOuterSVGIsCallingReflowSVG(this))>:: isValid, "invalid assertion condition"); if ((__builtin_expect (!!(!(!!(SVGUtils::AnyOuterSVGIsCallingReflowSVG(this)))), 0) )) { do { } while (false); MOZ_ReportAssertionFailure("SVGUtils::AnyOuterSVGIsCallingReflowSVG(this)" " (" "only call ReflowSVGNonDisplayText when an outer SVG frame is " "under ReflowSVG" ")", "/var/lib/jenkins/workspace/firefox-scan-build/layout/svg/SVGTextFrame.cpp" , 2821); AnnotateMozCrashReason("MOZ_ASSERT" "(" "SVGUtils::AnyOuterSVGIsCallingReflowSVG(this)" ") (" "only call ReflowSVGNonDisplayText when an outer SVG frame is " "under ReflowSVG" ")"); do { *((volatile int*)__null) = 2821 ; __attribute__((nomerge)) ::abort(); } while (false); } } while (false) |
2820 | "only call ReflowSVGNonDisplayText when an outer SVG frame is "do { static_assert( mozilla::detail::AssertionConditionType< decltype(SVGUtils::AnyOuterSVGIsCallingReflowSVG(this))>:: isValid, "invalid assertion condition"); if ((__builtin_expect (!!(!(!!(SVGUtils::AnyOuterSVGIsCallingReflowSVG(this)))), 0) )) { do { } while (false); MOZ_ReportAssertionFailure("SVGUtils::AnyOuterSVGIsCallingReflowSVG(this)" " (" "only call ReflowSVGNonDisplayText when an outer SVG frame is " "under ReflowSVG" ")", "/var/lib/jenkins/workspace/firefox-scan-build/layout/svg/SVGTextFrame.cpp" , 2821); AnnotateMozCrashReason("MOZ_ASSERT" "(" "SVGUtils::AnyOuterSVGIsCallingReflowSVG(this)" ") (" "only call ReflowSVGNonDisplayText when an outer SVG frame is " "under ReflowSVG" ")"); do { *((volatile int*)__null) = 2821 ; __attribute__((nomerge)) ::abort(); } while (false); } } while (false) |
2821 | "under ReflowSVG")do { static_assert( mozilla::detail::AssertionConditionType< decltype(SVGUtils::AnyOuterSVGIsCallingReflowSVG(this))>:: isValid, "invalid assertion condition"); if ((__builtin_expect (!!(!(!!(SVGUtils::AnyOuterSVGIsCallingReflowSVG(this)))), 0) )) { do { } while (false); MOZ_ReportAssertionFailure("SVGUtils::AnyOuterSVGIsCallingReflowSVG(this)" " (" "only call ReflowSVGNonDisplayText when an outer SVG frame is " "under ReflowSVG" ")", "/var/lib/jenkins/workspace/firefox-scan-build/layout/svg/SVGTextFrame.cpp" , 2821); AnnotateMozCrashReason("MOZ_ASSERT" "(" "SVGUtils::AnyOuterSVGIsCallingReflowSVG(this)" ") (" "only call ReflowSVGNonDisplayText when an outer SVG frame is " "under ReflowSVG" ")"); do { *((volatile int*)__null) = 2821 ; __attribute__((nomerge)) ::abort(); } while (false); } } while (false); |
2822 | MOZ_ASSERT(HasAnyStateBits(NS_FRAME_IS_NONDISPLAY),do { static_assert( mozilla::detail::AssertionConditionType< decltype(HasAnyStateBits(NS_FRAME_IS_NONDISPLAY))>::isValid , "invalid assertion condition"); if ((__builtin_expect(!!(!( !!(HasAnyStateBits(NS_FRAME_IS_NONDISPLAY)))), 0))) { do { } while (false); MOZ_ReportAssertionFailure("HasAnyStateBits(NS_FRAME_IS_NONDISPLAY)" " (" "only call ReflowSVGNonDisplayText if the frame is " "NS_FRAME_IS_NONDISPLAY" ")", "/var/lib/jenkins/workspace/firefox-scan-build/layout/svg/SVGTextFrame.cpp" , 2824); AnnotateMozCrashReason("MOZ_ASSERT" "(" "HasAnyStateBits(NS_FRAME_IS_NONDISPLAY)" ") (" "only call ReflowSVGNonDisplayText if the frame is " "NS_FRAME_IS_NONDISPLAY" ")"); do { *((volatile int*)__null) = 2824; __attribute__((nomerge )) ::abort(); } while (false); } } while (false) |
2823 | "only call ReflowSVGNonDisplayText if the frame is "do { static_assert( mozilla::detail::AssertionConditionType< decltype(HasAnyStateBits(NS_FRAME_IS_NONDISPLAY))>::isValid , "invalid assertion condition"); if ((__builtin_expect(!!(!( !!(HasAnyStateBits(NS_FRAME_IS_NONDISPLAY)))), 0))) { do { } while (false); MOZ_ReportAssertionFailure("HasAnyStateBits(NS_FRAME_IS_NONDISPLAY)" " (" "only call ReflowSVGNonDisplayText if the frame is " "NS_FRAME_IS_NONDISPLAY" ")", "/var/lib/jenkins/workspace/firefox-scan-build/layout/svg/SVGTextFrame.cpp" , 2824); AnnotateMozCrashReason("MOZ_ASSERT" "(" "HasAnyStateBits(NS_FRAME_IS_NONDISPLAY)" ") (" "only call ReflowSVGNonDisplayText if the frame is " "NS_FRAME_IS_NONDISPLAY" ")"); do { *((volatile int*)__null) = 2824; __attribute__((nomerge )) ::abort(); } while (false); } } while (false) |
2824 | "NS_FRAME_IS_NONDISPLAY")do { static_assert( mozilla::detail::AssertionConditionType< decltype(HasAnyStateBits(NS_FRAME_IS_NONDISPLAY))>::isValid , "invalid assertion condition"); if ((__builtin_expect(!!(!( !!(HasAnyStateBits(NS_FRAME_IS_NONDISPLAY)))), 0))) { do { } while (false); MOZ_ReportAssertionFailure("HasAnyStateBits(NS_FRAME_IS_NONDISPLAY)" " (" "only call ReflowSVGNonDisplayText if the frame is " "NS_FRAME_IS_NONDISPLAY" ")", "/var/lib/jenkins/workspace/firefox-scan-build/layout/svg/SVGTextFrame.cpp" , 2824); AnnotateMozCrashReason("MOZ_ASSERT" "(" "HasAnyStateBits(NS_FRAME_IS_NONDISPLAY)" ") (" "only call ReflowSVGNonDisplayText if the frame is " "NS_FRAME_IS_NONDISPLAY" ")"); do { *((volatile int*)__null) = 2824; __attribute__((nomerge )) ::abort(); } while (false); } } while (false); |
2825 | |
2826 | // We had a style change, so we mark this frame as dirty so that the next |
2827 | // time it is painted, we reflow the anonymous block frame. |
2828 | this->MarkSubtreeDirty(); |
2829 | |
2830 | // Finally, we need to actually reflow the anonymous block frame and update |
2831 | // mPositions, in case we are being reflowed immediately after a DOM |
2832 | // mutation that needs frame reconstruction. |
2833 | MaybeReflowAnonymousBlockChild(); |
2834 | UpdateGlyphPositioning(); |
2835 | } |
2836 | |
2837 | void SVGTextFrame::ScheduleReflowSVGNonDisplayText(IntrinsicDirty aReason) { |
2838 | MOZ_ASSERT(!SVGUtils::OuterSVGIsCallingReflowSVG(this),do { static_assert( mozilla::detail::AssertionConditionType< decltype(!SVGUtils::OuterSVGIsCallingReflowSVG(this))>::isValid , "invalid assertion condition"); if ((__builtin_expect(!!(!( !!(!SVGUtils::OuterSVGIsCallingReflowSVG(this)))), 0))) { do { } while (false); MOZ_ReportAssertionFailure("!SVGUtils::OuterSVGIsCallingReflowSVG(this)" " (" "do not call ScheduleReflowSVGNonDisplayText when the outer SVG " "frame is under ReflowSVG" ")", "/var/lib/jenkins/workspace/firefox-scan-build/layout/svg/SVGTextFrame.cpp" , 2840); AnnotateMozCrashReason("MOZ_ASSERT" "(" "!SVGUtils::OuterSVGIsCallingReflowSVG(this)" ") (" "do not call ScheduleReflowSVGNonDisplayText when the outer SVG " "frame is under ReflowSVG" ")"); do { *((volatile int*)__null ) = 2840; __attribute__((nomerge)) ::abort(); } while (false) ; } } while (false) |
2839 | "do not call ScheduleReflowSVGNonDisplayText when the outer SVG "do { static_assert( mozilla::detail::AssertionConditionType< decltype(!SVGUtils::OuterSVGIsCallingReflowSVG(this))>::isValid , "invalid assertion condition"); if ((__builtin_expect(!!(!( !!(!SVGUtils::OuterSVGIsCallingReflowSVG(this)))), 0))) { do { } while (false); MOZ_ReportAssertionFailure("!SVGUtils::OuterSVGIsCallingReflowSVG(this)" " (" "do not call ScheduleReflowSVGNonDisplayText when the outer SVG " "frame is under ReflowSVG" ")", "/var/lib/jenkins/workspace/firefox-scan-build/layout/svg/SVGTextFrame.cpp" , 2840); AnnotateMozCrashReason("MOZ_ASSERT" "(" "!SVGUtils::OuterSVGIsCallingReflowSVG(this)" ") (" "do not call ScheduleReflowSVGNonDisplayText when the outer SVG " "frame is under ReflowSVG" ")"); do { *((volatile int*)__null ) = 2840; __attribute__((nomerge)) ::abort(); } while (false) ; } } while (false) |
2840 | "frame is under ReflowSVG")do { static_assert( mozilla::detail::AssertionConditionType< decltype(!SVGUtils::OuterSVGIsCallingReflowSVG(this))>::isValid , "invalid assertion condition"); if ((__builtin_expect(!!(!( !!(!SVGUtils::OuterSVGIsCallingReflowSVG(this)))), 0))) { do { } while (false); MOZ_ReportAssertionFailure("!SVGUtils::OuterSVGIsCallingReflowSVG(this)" " (" "do not call ScheduleReflowSVGNonDisplayText when the outer SVG " "frame is under ReflowSVG" ")", "/var/lib/jenkins/workspace/firefox-scan-build/layout/svg/SVGTextFrame.cpp" , 2840); AnnotateMozCrashReason("MOZ_ASSERT" "(" "!SVGUtils::OuterSVGIsCallingReflowSVG(this)" ") (" "do not call ScheduleReflowSVGNonDisplayText when the outer SVG " "frame is under ReflowSVG" ")"); do { *((volatile int*)__null ) = 2840; __attribute__((nomerge)) ::abort(); } while (false) ; } } while (false); |
2841 | MOZ_ASSERT(!HasAnyStateBits(NS_STATE_SVG_TEXT_IN_REFLOW),do { static_assert( mozilla::detail::AssertionConditionType< decltype(!HasAnyStateBits(NS_STATE_SVG_TEXT_IN_REFLOW))>:: isValid, "invalid assertion condition"); if ((__builtin_expect (!!(!(!!(!HasAnyStateBits(NS_STATE_SVG_TEXT_IN_REFLOW)))), 0) )) { do { } while (false); MOZ_ReportAssertionFailure("!HasAnyStateBits(NS_STATE_SVG_TEXT_IN_REFLOW)" " (" "do not call ScheduleReflowSVGNonDisplayText while reflowing the " "anonymous block child" ")", "/var/lib/jenkins/workspace/firefox-scan-build/layout/svg/SVGTextFrame.cpp" , 2843); AnnotateMozCrashReason("MOZ_ASSERT" "(" "!HasAnyStateBits(NS_STATE_SVG_TEXT_IN_REFLOW)" ") (" "do not call ScheduleReflowSVGNonDisplayText while reflowing the " "anonymous block child" ")"); do { *((volatile int*)__null) = 2843; __attribute__((nomerge)) ::abort(); } while (false); } } while (false) |
2842 | "do not call ScheduleReflowSVGNonDisplayText while reflowing the "do { static_assert( mozilla::detail::AssertionConditionType< decltype(!HasAnyStateBits(NS_STATE_SVG_TEXT_IN_REFLOW))>:: isValid, "invalid assertion condition"); if ((__builtin_expect (!!(!(!!(!HasAnyStateBits(NS_STATE_SVG_TEXT_IN_REFLOW)))), 0) )) { do { } while (false); MOZ_ReportAssertionFailure("!HasAnyStateBits(NS_STATE_SVG_TEXT_IN_REFLOW)" " (" "do not call ScheduleReflowSVGNonDisplayText while reflowing the " "anonymous block child" ")", "/var/lib/jenkins/workspace/firefox-scan-build/layout/svg/SVGTextFrame.cpp" , 2843); AnnotateMozCrashReason("MOZ_ASSERT" "(" "!HasAnyStateBits(NS_STATE_SVG_TEXT_IN_REFLOW)" ") (" "do not call ScheduleReflowSVGNonDisplayText while reflowing the " "anonymous block child" ")"); do { *((volatile int*)__null) = 2843; __attribute__((nomerge)) ::abort(); } while (false); } } while (false) |
2843 | "anonymous block child")do { static_assert( mozilla::detail::AssertionConditionType< decltype(!HasAnyStateBits(NS_STATE_SVG_TEXT_IN_REFLOW))>:: isValid, "invalid assertion condition"); if ((__builtin_expect (!!(!(!!(!HasAnyStateBits(NS_STATE_SVG_TEXT_IN_REFLOW)))), 0) )) { do { } while (false); MOZ_ReportAssertionFailure("!HasAnyStateBits(NS_STATE_SVG_TEXT_IN_REFLOW)" " (" "do not call ScheduleReflowSVGNonDisplayText while reflowing the " "anonymous block child" ")", "/var/lib/jenkins/workspace/firefox-scan-build/layout/svg/SVGTextFrame.cpp" , 2843); AnnotateMozCrashReason("MOZ_ASSERT" "(" "!HasAnyStateBits(NS_STATE_SVG_TEXT_IN_REFLOW)" ") (" "do not call ScheduleReflowSVGNonDisplayText while reflowing the " "anonymous block child" ")"); do { *((volatile int*)__null) = 2843; __attribute__((nomerge)) ::abort(); } while (false); } } while (false); |
2844 | |
2845 | // We need to find an ancestor frame that we can call FrameNeedsReflow |
2846 | // on that will cause the document to be marked as needing relayout, |
2847 | // and for that ancestor (or some further ancestor) to be marked as |
2848 | // a root to reflow. We choose the closest ancestor frame that is not |
2849 | // NS_FRAME_IS_NONDISPLAY and which is either an outer SVG frame or a |
2850 | // non-SVG frame. (We don't consider displayed SVG frame ancestors other |
2851 | // than SVGOuterSVGFrame, since calling FrameNeedsReflow on those other |
2852 | // SVG frames would do a bunch of unnecessary work on the SVG frames up to |
2853 | // the SVGOuterSVGFrame.) |
2854 | |
2855 | nsIFrame* f = this; |
2856 | while (f) { |
2857 | if (!f->HasAnyStateBits(NS_FRAME_IS_NONDISPLAY)) { |
2858 | if (f->IsSubtreeDirty()) { |
2859 | // This is a displayed frame, so if it is already dirty, we will be |
2860 | // reflowed soon anyway. No need to call FrameNeedsReflow again, then. |
2861 | return; |
2862 | } |
2863 | if (!f->HasAnyStateBits(NS_FRAME_SVG_LAYOUT)) { |
2864 | break; |
2865 | } |
2866 | f->AddStateBits(NS_FRAME_HAS_DIRTY_CHILDREN); |
2867 | } |
2868 | f = f->GetParent(); |
2869 | } |
2870 | |
2871 | MOZ_ASSERT(f, "should have found an ancestor frame to reflow")do { static_assert( mozilla::detail::AssertionConditionType< decltype(f)>::isValid, "invalid assertion condition"); if ( (__builtin_expect(!!(!(!!(f))), 0))) { do { } while (false); MOZ_ReportAssertionFailure ("f" " (" "should have found an ancestor frame to reflow" ")" , "/var/lib/jenkins/workspace/firefox-scan-build/layout/svg/SVGTextFrame.cpp" , 2871); AnnotateMozCrashReason("MOZ_ASSERT" "(" "f" ") (" "should have found an ancestor frame to reflow" ")"); do { *((volatile int*)__null) = 2871; __attribute__((nomerge )) ::abort(); } while (false); } } while (false); |
2872 | |
2873 | PresShell()->FrameNeedsReflow(f, aReason, NS_FRAME_IS_DIRTY); |
2874 | } |
2875 | |
2876 | NS_IMPL_ISUPPORTS(SVGTextFrame::MutationObserver, nsIMutationObserver)MozExternalRefCountType SVGTextFrame::MutationObserver::AddRef (void) { static_assert(!std::is_destructible_v<SVGTextFrame ::MutationObserver>, "Reference-counted class " "SVGTextFrame::MutationObserver" " 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/layout/svg/SVGTextFrame.cpp" , 2876); AnnotateMozCrashReason("MOZ_ASSERT" "(" "int32_t(mRefCnt) >= 0" ") (" "illegal refcnt" ")"); do { *((volatile int*)__null) = 2876; __attribute__((nomerge)) ::abort(); } while (false); } } while (false); do { static_assert( mozilla::detail::AssertionConditionType <decltype("SVGTextFrame::MutationObserver" != nullptr)> ::isValid, "invalid assertion condition"); if ((__builtin_expect (!!(!(!!("SVGTextFrame::MutationObserver" != nullptr))), 0))) { do { } while (false); MOZ_ReportAssertionFailure("\"SVGTextFrame::MutationObserver\" != nullptr" " (" "Must specify a name" ")", "/var/lib/jenkins/workspace/firefox-scan-build/layout/svg/SVGTextFrame.cpp" , 2876); AnnotateMozCrashReason("MOZ_ASSERT" "(" "\"SVGTextFrame::MutationObserver\" != nullptr" ") (" "Must specify a name" ")"); do { *((volatile int*)__null ) = 2876; __attribute__((nomerge)) ::abort(); } while (false) ; } } while (false); if (!mRefCnt.isThreadSafe) _mOwningThread .AssertOwnership("SVGTextFrame::MutationObserver" " not thread-safe" ); nsrefcnt count = ++mRefCnt; NS_LogAddRef((this), (count), ( "SVGTextFrame::MutationObserver"), (uint32_t)(sizeof(*this))) ; return count; } MozExternalRefCountType SVGTextFrame::MutationObserver ::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/layout/svg/SVGTextFrame.cpp" , 2876); AnnotateMozCrashReason("MOZ_ASSERT" "(" "int32_t(mRefCnt) > 0" ") (" "dup release" ")"); do { *((volatile int*)__null) = 2876 ; __attribute__((nomerge)) ::abort(); } while (false); } } while (false); do { static_assert( mozilla::detail::AssertionConditionType <decltype("SVGTextFrame::MutationObserver" != nullptr)> ::isValid, "invalid assertion condition"); if ((__builtin_expect (!!(!(!!("SVGTextFrame::MutationObserver" != nullptr))), 0))) { do { } while (false); MOZ_ReportAssertionFailure("\"SVGTextFrame::MutationObserver\" != nullptr" " (" "Must specify a name" ")", "/var/lib/jenkins/workspace/firefox-scan-build/layout/svg/SVGTextFrame.cpp" , 2876); AnnotateMozCrashReason("MOZ_ASSERT" "(" "\"SVGTextFrame::MutationObserver\" != nullptr" ") (" "Must specify a name" ")"); do { *((volatile int*)__null ) = 2876; __attribute__((nomerge)) ::abort(); } while (false) ; } } while (false); if (!mRefCnt.isThreadSafe) _mOwningThread .AssertOwnership("SVGTextFrame::MutationObserver" " not thread-safe" ); const char* const nametmp = "SVGTextFrame::MutationObserver" ; nsrefcnt count = --mRefCnt; NS_LogRelease((this), (count), ( nametmp)); if (count == 0) { mRefCnt = 1; delete (this); return 0; } return count; } nsresult SVGTextFrame::MutationObserver ::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/layout/svg/SVGTextFrame.cpp" , 2876); MOZ_PretendNoReturn(); } } while (0); nsresult rv = NS_ERROR_FAILURE ; static_assert(1 > 0, "Need more arguments to NS_INTERFACE_TABLE" ); static const QITableEntry table[] = { {&mozilla::detail ::kImplementedIID<SVGTextFrame::MutationObserver, nsIMutationObserver >, int32_t( reinterpret_cast<char*>(static_cast<nsIMutationObserver *>((SVGTextFrame::MutationObserver*)0x1000)) - reinterpret_cast <char*>((SVGTextFrame::MutationObserver*)0x1000))}, {& mozilla::detail::kImplementedIID<SVGTextFrame::MutationObserver , nsISupports>, int32_t(reinterpret_cast<char*>(static_cast <nsISupports*>( static_cast<nsIMutationObserver*> ((SVGTextFrame::MutationObserver*)0x1000))) - reinterpret_cast <char*>((SVGTextFrame::MutationObserver*)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; } |
2877 | |
2878 | void SVGTextFrame::MutationObserver::ContentAppended( |
2879 | nsIContent* aFirstNewContent) { |
2880 | mFrame->NotifyGlyphMetricsChange(true); |
2881 | } |
2882 | |
2883 | void SVGTextFrame::MutationObserver::ContentInserted(nsIContent* aChild) { |
2884 | mFrame->NotifyGlyphMetricsChange(true); |
2885 | } |
2886 | |
2887 | void SVGTextFrame::MutationObserver::ContentRemoved( |
2888 | nsIContent* aChild, nsIContent* aPreviousSibling) { |
2889 | mFrame->NotifyGlyphMetricsChange(true); |
2890 | } |
2891 | |
2892 | void SVGTextFrame::MutationObserver::CharacterDataChanged( |
2893 | nsIContent* aContent, const CharacterDataChangeInfo&) { |
2894 | mFrame->NotifyGlyphMetricsChange(true); |
2895 | } |
2896 | |
2897 | void SVGTextFrame::MutationObserver::AttributeChanged( |
2898 | Element* aElement, int32_t aNameSpaceID, nsAtom* aAttribute, |
2899 | int32_t aModType, const nsAttrValue* aOldValue) { |
2900 | if (!aElement->IsSVGElement()) { |
2901 | return; |
2902 | } |
2903 | |
2904 | // Attribute changes on this element will be handled by |
2905 | // SVGTextFrame::AttributeChanged. |
2906 | if (aElement == mFrame->GetContent()) { |
2907 | return; |
2908 | } |
2909 | |
2910 | mFrame->HandleAttributeChangeInDescendant(aElement, aNameSpaceID, aAttribute); |
2911 | } |
2912 | |
2913 | void SVGTextFrame::HandleAttributeChangeInDescendant(Element* aElement, |
2914 | int32_t aNameSpaceID, |
2915 | nsAtom* aAttribute) { |
2916 | if (aElement->IsSVGElement(nsGkAtoms::textPath)) { |
2917 | if (aNameSpaceID == kNameSpaceID_None && |
2918 | (aAttribute == nsGkAtoms::startOffset || |
2919 | aAttribute == nsGkAtoms::path || aAttribute == nsGkAtoms::side_)) { |
2920 | NotifyGlyphMetricsChange(false); |
2921 | } else if ((aNameSpaceID == kNameSpaceID_XLink4 || |
2922 | aNameSpaceID == kNameSpaceID_None) && |
2923 | aAttribute == nsGkAtoms::href) { |
2924 | // Blow away our reference, if any |
2925 | nsIFrame* childElementFrame = aElement->GetPrimaryFrame(); |
2926 | if (childElementFrame) { |
2927 | SVGObserverUtils::RemoveTextPathObserver(childElementFrame); |
2928 | NotifyGlyphMetricsChange(false); |
2929 | } |
2930 | } |
2931 | } else { |
2932 | if (aNameSpaceID == kNameSpaceID_None && |
2933 | IsGlyphPositioningAttribute(aAttribute)) { |
2934 | NotifyGlyphMetricsChange(false); |
2935 | } |
2936 | } |
2937 | } |
2938 | |
2939 | void SVGTextFrame::FindCloserFrameForSelection( |
2940 | const nsPoint& aPoint, FrameWithDistance* aCurrentBestFrame) { |
2941 | if (HasAnyStateBits(NS_FRAME_IS_NONDISPLAY)) { |
2942 | return; |
2943 | } |
2944 | |
2945 | UpdateGlyphPositioning(); |
2946 | |
2947 | nsPresContext* presContext = PresContext(); |
2948 | |
2949 | // Find the frame that has the closest rendered run rect to aPoint. |
2950 | TextRenderedRunIterator it(this); |
2951 | for (TextRenderedRun run = it.Current(); run.mFrame; run = it.Next()) { |
2952 | uint32_t flags = TextRenderedRun::eIncludeFill | |
2953 | TextRenderedRun::eIncludeStroke | |
2954 | TextRenderedRun::eNoHorizontalOverflow; |
2955 | SVGBBox userRect = run.GetUserSpaceRect(presContext, flags); |
2956 | float devPxPerCSSPx = presContext->CSSPixelsToDevPixels(1.f); |
2957 | userRect.Scale(devPxPerCSSPx); |
2958 | |
2959 | if (!userRect.IsEmpty()) { |
2960 | gfxMatrix m; |
2961 | nsRect rect = |
2962 | SVGUtils::ToCanvasBounds(userRect.ToThebesRect(), m, presContext); |
2963 | |
2964 | if (nsLayoutUtils::PointIsCloserToRect(aPoint, rect, |
2965 | aCurrentBestFrame->mXDistance, |
2966 | aCurrentBestFrame->mYDistance)) { |
2967 | aCurrentBestFrame->mFrame = run.mFrame; |
2968 | } |
2969 | } |
2970 | } |
2971 | } |
2972 | |
2973 | //---------------------------------------------------------------------- |
2974 | // ISVGDisplayableFrame methods |
2975 | |
2976 | void SVGTextFrame::NotifySVGChanged(uint32_t aFlags) { |
2977 | MOZ_ASSERT(aFlags & (TRANSFORM_CHANGED | COORD_CONTEXT_CHANGED),do { static_assert( mozilla::detail::AssertionConditionType< decltype(aFlags & (TRANSFORM_CHANGED | COORD_CONTEXT_CHANGED ))>::isValid, "invalid assertion condition"); if ((__builtin_expect (!!(!(!!(aFlags & (TRANSFORM_CHANGED | COORD_CONTEXT_CHANGED )))), 0))) { do { } while (false); MOZ_ReportAssertionFailure ("aFlags & (TRANSFORM_CHANGED | COORD_CONTEXT_CHANGED)" " (" "Invalidation logic may need adjusting" ")", "/var/lib/jenkins/workspace/firefox-scan-build/layout/svg/SVGTextFrame.cpp" , 2978); AnnotateMozCrashReason("MOZ_ASSERT" "(" "aFlags & (TRANSFORM_CHANGED | COORD_CONTEXT_CHANGED)" ") (" "Invalidation logic may need adjusting" ")"); do { *(( volatile int*)__null) = 2978; __attribute__((nomerge)) ::abort (); } while (false); } } while (false) |
2978 | "Invalidation logic may need adjusting")do { static_assert( mozilla::detail::AssertionConditionType< decltype(aFlags & (TRANSFORM_CHANGED | COORD_CONTEXT_CHANGED ))>::isValid, "invalid assertion condition"); if ((__builtin_expect (!!(!(!!(aFlags & (TRANSFORM_CHANGED | COORD_CONTEXT_CHANGED )))), 0))) { do { } while (false); MOZ_ReportAssertionFailure ("aFlags & (TRANSFORM_CHANGED | COORD_CONTEXT_CHANGED)" " (" "Invalidation logic may need adjusting" ")", "/var/lib/jenkins/workspace/firefox-scan-build/layout/svg/SVGTextFrame.cpp" , 2978); AnnotateMozCrashReason("MOZ_ASSERT" "(" "aFlags & (TRANSFORM_CHANGED | COORD_CONTEXT_CHANGED)" ") (" "Invalidation logic may need adjusting" ")"); do { *(( volatile int*)__null) = 2978; __attribute__((nomerge)) ::abort (); } while (false); } } while (false); |
2979 | |
2980 | bool needNewBounds = false; |
2981 | bool needGlyphMetricsUpdate = false; |
2982 | if ((aFlags & COORD_CONTEXT_CHANGED) && |
2983 | HasAnyStateBits(NS_STATE_SVG_POSITIONING_MAY_USE_PERCENTAGES)) { |
2984 | needGlyphMetricsUpdate = true; |
2985 | } |
2986 | |
2987 | if (aFlags & TRANSFORM_CHANGED) { |
2988 | if (mCanvasTM && mCanvasTM->IsSingular()) { |
2989 | // We won't have calculated the glyph positions correctly. |
2990 | needNewBounds = true; |
2991 | needGlyphMetricsUpdate = true; |
2992 | } |
2993 | mCanvasTM = nullptr; |
2994 | if (StyleSVGReset()->HasNonScalingStroke()) { |
2995 | // Stroke currently contributes to our mRect, and our stroke depends on |
2996 | // the transform to our outer-<svg> if |vector-effect:non-scaling-stroke|. |
2997 | needNewBounds = true; |
2998 | } |
2999 | |
3000 | // If the scale at which we computed our mFontSizeScaleFactor has changed by |
3001 | // at least a factor of two, reflow the text. This avoids reflowing text at |
3002 | // every tick of a transform animation, but ensures our glyph metrics |
3003 | // do not get too far out of sync with the final font size on the screen. |
3004 | const float scale = GetContextScale(this); |
3005 | if (scale != mLastContextScale) { |
3006 | if (mLastContextScale == 0.0f) { |
3007 | needNewBounds = true; |
3008 | needGlyphMetricsUpdate = true; |
3009 | } else { |
3010 | float change = scale / mLastContextScale; |
3011 | if (change >= 2.0f || change <= 0.5f) { |
3012 | needNewBounds = true; |
3013 | needGlyphMetricsUpdate = true; |
3014 | } |
3015 | } |
3016 | } |
3017 | } |
3018 | |
3019 | if (needNewBounds) { |
3020 | // Ancestor changes can't affect how we render from the perspective of |
3021 | // any rendering observers that we may have, so we don't need to |
3022 | // invalidate them. We also don't need to invalidate ourself, since our |
3023 | // changed ancestor will have invalidated its entire area, which includes |
3024 | // our area. |
3025 | ScheduleReflowSVG(); |
3026 | } |
3027 | |
3028 | if (needGlyphMetricsUpdate) { |
3029 | // If we are positioned using percentage values we need to update our |
3030 | // position whenever our viewport's dimensions change. But only do this if |
3031 | // we have been reflowed once, otherwise the glyph positioning will be |
3032 | // wrong. (We need to wait until bidi reordering has been done.) |
3033 | if (!HasAnyStateBits(NS_FRAME_FIRST_REFLOW)) { |
3034 | NotifyGlyphMetricsChange(false); |
3035 | } |
3036 | } |
3037 | } |
3038 | |
3039 | /** |
3040 | * Gets the offset into a DOM node that the specified caret is positioned at. |
3041 | */ |
3042 | static int32_t GetCaretOffset(nsCaret* aCaret) { |
3043 | RefPtr<Selection> selection = aCaret->GetSelection(); |
3044 | if (!selection) { |
3045 | return -1; |
3046 | } |
3047 | |
3048 | return selection->AnchorOffset(); |
3049 | } |
3050 | |
3051 | /** |
3052 | * Returns whether the caret should be painted for a given TextRenderedRun |
3053 | * by checking whether the caret is in the range covered by the rendered run. |
3054 | * |
3055 | * @param aThisRun The TextRenderedRun to be painted. |
3056 | * @param aCaret The caret. |
3057 | */ |
3058 | static bool ShouldPaintCaret(const TextRenderedRun& aThisRun, nsCaret* aCaret) { |
3059 | int32_t caretOffset = GetCaretOffset(aCaret); |
3060 | |
3061 | if (caretOffset < 0) { |
3062 | return false; |
3063 | } |
3064 | |
3065 | return uint32_t(caretOffset) >= aThisRun.mTextFrameContentOffset && |
3066 | uint32_t(caretOffset) < aThisRun.mTextFrameContentOffset + |
3067 | aThisRun.mTextFrameContentLength; |
3068 | } |
3069 | |
3070 | void SVGTextFrame::PaintSVG(gfxContext& aContext, const gfxMatrix& aTransform, |
3071 | imgDrawingParams& aImgParams) { |
3072 | DrawTarget& aDrawTarget = *aContext.GetDrawTarget(); |
3073 | nsIFrame* kid = PrincipalChildList().FirstChild(); |
3074 | if (!kid) { |
3075 | return; |
3076 | } |
3077 | |
3078 | nsPresContext* presContext = PresContext(); |
3079 | |
3080 | gfxMatrix initialMatrix = aContext.CurrentMatrixDouble(); |
3081 | |
3082 | if (HasAnyStateBits(NS_FRAME_IS_NONDISPLAY)) { |
3083 | // If we are in a canvas DrawWindow call that used the |
3084 | // DRAWWINDOW_DO_NOT_FLUSH flag, then we may still have out |
3085 | // of date frames. Just don't paint anything if they are |
3086 | // dirty. |
3087 | if (presContext->PresShell()->InDrawWindowNotFlushing() && |
3088 | IsSubtreeDirty()) { |
3089 | return; |
3090 | } |
3091 | // Text frames inside <clipPath>, <mask>, etc. will never have had |
3092 | // ReflowSVG called on them, so call UpdateGlyphPositioning to do this now. |
3093 | UpdateGlyphPositioning(); |
3094 | } else if (IsSubtreeDirty()) { |
3095 | // If we are asked to paint before reflow has recomputed mPositions etc. |
3096 | // directly via PaintSVG, rather than via a display list, then we need |
3097 | // to bail out here too. |
3098 | return; |
3099 | } |
3100 | |
3101 | const float epsilon = 0.0001; |
3102 | if (abs(mLengthAdjustScaleFactor) < epsilon) { |
3103 | // A zero scale factor can be caused by having forced the text length to |
3104 | // zero. In this situation there is nothing to show. |
3105 | return; |
3106 | } |
3107 | |
3108 | if (aTransform.IsSingular()) { |
3109 | NS_WARNING("Can't render text element!")NS_DebugBreak(NS_DEBUG_WARNING, "Can't render text element!", nullptr, "/var/lib/jenkins/workspace/firefox-scan-build/layout/svg/SVGTextFrame.cpp" , 3109); |
3110 | return; |
3111 | } |
3112 | |
3113 | gfxMatrix matrixForPaintServers = aTransform * initialMatrix; |
3114 | |
3115 | // SVG frames' PaintSVG methods paint in CSS px, but normally frames paint in |
3116 | // dev pixels. Here we multiply a CSS-px-to-dev-pixel factor onto aTransform |
3117 | // so our non-SVG nsTextFrame children paint correctly. |
3118 | auto auPerDevPx = presContext->AppUnitsPerDevPixel(); |
3119 | float cssPxPerDevPx = nsPresContext::AppUnitsToFloatCSSPixels(auPerDevPx); |
3120 | gfxMatrix canvasTMForChildren = aTransform; |
3121 | canvasTMForChildren.PreScale(cssPxPerDevPx, cssPxPerDevPx); |
3122 | initialMatrix.PreScale(1 / cssPxPerDevPx, 1 / cssPxPerDevPx); |
3123 | |
3124 | gfxContextMatrixAutoSaveRestore matSR(&aContext); |
3125 | aContext.NewPath(); |
3126 | aContext.Multiply(canvasTMForChildren); |
3127 | gfxMatrix currentMatrix = aContext.CurrentMatrixDouble(); |
3128 | |
3129 | RefPtr<nsCaret> caret = presContext->PresShell()->GetCaret(); |
3130 | nsRect caretRect; |
3131 | nsIFrame* caretFrame = caret->GetPaintGeometry(&caretRect); |
3132 | |
3133 | gfxContextAutoSaveRestore ctxSR; |
3134 | TextRenderedRunIterator it(this, TextRenderedRunIterator::eVisibleFrames); |
3135 | TextRenderedRun run = it.Current(); |
3136 | |
3137 | SVGContextPaint* outerContextPaint = |
3138 | SVGContextPaint::GetContextPaint(GetContent()); |
3139 | |
3140 | while (run.mFrame) { |
3141 | nsTextFrame* frame = run.mFrame; |
3142 | |
3143 | auto contextPaint = MakeRefPtr<SVGContextPaintImpl>(); |
3144 | DrawMode drawMode = contextPaint->Init(&aDrawTarget, initialMatrix, frame, |
3145 | outerContextPaint, aImgParams); |
3146 | if (drawMode & DrawMode::GLYPH_STROKE) { |
3147 | ctxSR.EnsureSaved(&aContext); |
3148 | // This may change the gfxContext's transform (for non-scaling stroke), |
3149 | // in which case this needs to happen before we call SetMatrix() below. |
3150 | SVGUtils::SetupStrokeGeometry(frame->GetParent(), &aContext, |
3151 | outerContextPaint); |
3152 | } |
3153 | |
3154 | nscoord startEdge, endEdge; |
3155 | run.GetClipEdges(startEdge, endEdge); |
3156 | |
3157 | // Set up the transform for painting the text frame for the substring |
3158 | // indicated by the run. |
3159 | gfxMatrix runTransform = run.GetTransformFromUserSpaceForPainting( |
3160 | presContext, startEdge, endEdge) * |
3161 | currentMatrix; |
3162 | aContext.SetMatrixDouble(runTransform); |
3163 | |
3164 | if (drawMode != DrawMode(0)) { |
3165 | bool paintSVGGlyphs; |
3166 | nsTextFrame::PaintTextParams params(&aContext); |
3167 | params.framePt = Point(); |
3168 | params.dirtyRect = |
3169 | LayoutDevicePixel::FromAppUnits(frame->InkOverflowRect(), auPerDevPx); |
3170 | params.contextPaint = contextPaint; |
3171 | bool isSelected; |
3172 | if (HasAnyStateBits(NS_STATE_SVG_CLIPPATH_CHILD)) { |
3173 | params.state = nsTextFrame::PaintTextParams::GenerateTextMask; |
3174 | isSelected = false; |
3175 | } else { |
3176 | isSelected = frame->IsSelected(); |
3177 | } |
3178 | gfxGroupForBlendAutoSaveRestore autoGroupForBlend(&aContext); |
3179 | float opacity = 1.0f; |
3180 | nsIFrame* ancestor = frame->GetParent(); |
3181 | while (ancestor != this) { |
3182 | opacity *= ancestor->StyleEffects()->mOpacity; |
3183 | ancestor = ancestor->GetParent(); |
3184 | } |
3185 | if (opacity < 1.0f) { |
3186 | autoGroupForBlend.PushGroupForBlendBack(gfxContentType::COLOR_ALPHA, |
3187 | opacity); |
3188 | } |
3189 | |
3190 | if (ShouldRenderAsPath(frame, paintSVGGlyphs)) { |
3191 | SVGTextDrawPathCallbacks callbacks(this, aContext, frame, |
3192 | matrixForPaintServers, aImgParams, |
3193 | paintSVGGlyphs); |
3194 | params.callbacks = &callbacks; |
3195 | frame->PaintText(params, startEdge, endEdge, nsPoint(), isSelected); |
3196 | } else { |
3197 | frame->PaintText(params, startEdge, endEdge, nsPoint(), isSelected); |
3198 | } |
3199 | } |
3200 | |
3201 | if (frame == caretFrame && ShouldPaintCaret(run, caret)) { |
3202 | // XXX Should we be looking at the fill/stroke colours to paint the |
3203 | // caret with, rather than using the color property? |
3204 | caret->PaintCaret(aDrawTarget, frame, nsPoint()); |
3205 | aContext.NewPath(); |
3206 | } |
3207 | |
3208 | run = it.Next(); |
3209 | } |
3210 | } |
3211 | |
3212 | nsIFrame* SVGTextFrame::GetFrameForPoint(const gfxPoint& aPoint) { |
3213 | NS_ASSERTION(PrincipalChildList().FirstChild(), "must have a child frame")do { if (!(PrincipalChildList().FirstChild())) { NS_DebugBreak (NS_DEBUG_ASSERTION, "must have a child frame", "PrincipalChildList().FirstChild()" , "/var/lib/jenkins/workspace/firefox-scan-build/layout/svg/SVGTextFrame.cpp" , 3213); MOZ_PretendNoReturn(); } } while (0); |
3214 | |
3215 | if (HasAnyStateBits(NS_FRAME_IS_NONDISPLAY)) { |
3216 | // Text frames inside <clipPath> will never have had ReflowSVG called on |
3217 | // them, so call UpdateGlyphPositioning to do this now. (Text frames |
3218 | // inside <mask> and other non-display containers will never need to |
3219 | // be hit tested.) |
3220 | UpdateGlyphPositioning(); |
3221 | } else { |
3222 | NS_ASSERTION(!IsSubtreeDirty(), "reflow should have happened")do { if (!(!IsSubtreeDirty())) { NS_DebugBreak(NS_DEBUG_ASSERTION , "reflow should have happened", "!IsSubtreeDirty()", "/var/lib/jenkins/workspace/firefox-scan-build/layout/svg/SVGTextFrame.cpp" , 3222); MOZ_PretendNoReturn(); } } while (0); |
3223 | } |
3224 | |
3225 | // Hit-testing any clip-path will typically be a lot quicker than the |
3226 | // hit-testing of our text frames in the loop below, so we do the former up |
3227 | // front to avoid unnecessarily wasting cycles on the latter. |
3228 | if (!SVGUtils::HitTestClip(this, aPoint)) { |
3229 | return nullptr; |
3230 | } |
3231 | |
3232 | nsPresContext* presContext = PresContext(); |
3233 | |
3234 | // Ideally we'd iterate backwards so that we can just return the first frame |
3235 | // that is under aPoint. In practice this will rarely matter though since it |
3236 | // is rare for text in/under an SVG <text> element to overlap (i.e. the first |
3237 | // text frame that is hit will likely be the only text frame that is hit). |
3238 | |
3239 | TextRenderedRunIterator it(this); |
3240 | nsIFrame* hit = nullptr; |
3241 | for (TextRenderedRun run = it.Current(); run.mFrame; run = it.Next()) { |
3242 | uint16_t hitTestFlags = SVGUtils::GetGeometryHitTestFlags(run.mFrame); |
3243 | if (!hitTestFlags) { |
3244 | continue; |
3245 | } |
3246 | |
3247 | gfxMatrix m = run.GetTransformFromRunUserSpaceToUserSpace(presContext); |
3248 | if (!m.Invert()) { |
3249 | return nullptr; |
3250 | } |
3251 | |
3252 | gfxPoint pointInRunUserSpace = m.TransformPoint(aPoint); |
3253 | gfxRect frameRect = run.GetRunUserSpaceRect( |
3254 | presContext, TextRenderedRun::eIncludeFill | |
3255 | TextRenderedRun::eIncludeStroke) |
3256 | .ToThebesRect(); |
3257 | |
3258 | if (Inside(frameRect, pointInRunUserSpace)) { |
3259 | hit = run.mFrame; |
3260 | } |
3261 | } |
3262 | return hit; |
3263 | } |
3264 | |
3265 | void SVGTextFrame::ReflowSVG() { |
3266 | MOZ_ASSERT(SVGUtils::AnyOuterSVGIsCallingReflowSVG(this),do { static_assert( mozilla::detail::AssertionConditionType< decltype(SVGUtils::AnyOuterSVGIsCallingReflowSVG(this))>:: isValid, "invalid assertion condition"); if ((__builtin_expect (!!(!(!!(SVGUtils::AnyOuterSVGIsCallingReflowSVG(this)))), 0) )) { do { } while (false); MOZ_ReportAssertionFailure("SVGUtils::AnyOuterSVGIsCallingReflowSVG(this)" " (" "This call is probaby a wasteful mistake" ")", "/var/lib/jenkins/workspace/firefox-scan-build/layout/svg/SVGTextFrame.cpp" , 3267); AnnotateMozCrashReason("MOZ_ASSERT" "(" "SVGUtils::AnyOuterSVGIsCallingReflowSVG(this)" ") (" "This call is probaby a wasteful mistake" ")"); do { * ((volatile int*)__null) = 3267; __attribute__((nomerge)) ::abort (); } while (false); } } while (false) |
3267 | "This call is probaby a wasteful mistake")do { static_assert( mozilla::detail::AssertionConditionType< decltype(SVGUtils::AnyOuterSVGIsCallingReflowSVG(this))>:: isValid, "invalid assertion condition"); if ((__builtin_expect (!!(!(!!(SVGUtils::AnyOuterSVGIsCallingReflowSVG(this)))), 0) )) { do { } while (false); MOZ_ReportAssertionFailure("SVGUtils::AnyOuterSVGIsCallingReflowSVG(this)" " (" "This call is probaby a wasteful mistake" ")", "/var/lib/jenkins/workspace/firefox-scan-build/layout/svg/SVGTextFrame.cpp" , 3267); AnnotateMozCrashReason("MOZ_ASSERT" "(" "SVGUtils::AnyOuterSVGIsCallingReflowSVG(this)" ") (" "This call is probaby a wasteful mistake" ")"); do { * ((volatile int*)__null) = 3267; __attribute__((nomerge)) ::abort (); } while (false); } } while (false); |
3268 | |
3269 | MOZ_ASSERT(!HasAnyStateBits(NS_FRAME_IS_NONDISPLAY),do { static_assert( mozilla::detail::AssertionConditionType< decltype(!HasAnyStateBits(NS_FRAME_IS_NONDISPLAY))>::isValid , "invalid assertion condition"); if ((__builtin_expect(!!(!( !!(!HasAnyStateBits(NS_FRAME_IS_NONDISPLAY)))), 0))) { do { } while (false); MOZ_ReportAssertionFailure("!HasAnyStateBits(NS_FRAME_IS_NONDISPLAY)" " (" "ReflowSVG mechanism not designed for this" ")", "/var/lib/jenkins/workspace/firefox-scan-build/layout/svg/SVGTextFrame.cpp" , 3270); AnnotateMozCrashReason("MOZ_ASSERT" "(" "!HasAnyStateBits(NS_FRAME_IS_NONDISPLAY)" ") (" "ReflowSVG mechanism not designed for this" ")"); do { *((volatile int*)__null) = 3270; __attribute__((nomerge)) :: abort(); } while (false); } } while (false) |
3270 | "ReflowSVG mechanism not designed for this")do { static_assert( mozilla::detail::AssertionConditionType< decltype(!HasAnyStateBits(NS_FRAME_IS_NONDISPLAY))>::isValid , "invalid assertion condition"); if ((__builtin_expect(!!(!( !!(!HasAnyStateBits(NS_FRAME_IS_NONDISPLAY)))), 0))) { do { } while (false); MOZ_ReportAssertionFailure("!HasAnyStateBits(NS_FRAME_IS_NONDISPLAY)" " (" "ReflowSVG mechanism not designed for this" ")", "/var/lib/jenkins/workspace/firefox-scan-build/layout/svg/SVGTextFrame.cpp" , 3270); AnnotateMozCrashReason("MOZ_ASSERT" "(" "!HasAnyStateBits(NS_FRAME_IS_NONDISPLAY)" ") (" "ReflowSVG mechanism not designed for this" ")"); do { *((volatile int*)__null) = 3270; __attribute__((nomerge)) :: abort(); } while (false); } } while (false); |
3271 | |
3272 | if (!SVGUtils::NeedsReflowSVG(this)) { |
3273 | MOZ_ASSERT(!HasAnyStateBits(NS_STATE_SVG_TEXT_CORRESPONDENCE_DIRTY |do { static_assert( mozilla::detail::AssertionConditionType< decltype(!HasAnyStateBits(NS_STATE_SVG_TEXT_CORRESPONDENCE_DIRTY | NS_STATE_SVG_POSITIONING_DIRTY))>::isValid, "invalid assertion condition" ); if ((__builtin_expect(!!(!(!!(!HasAnyStateBits(NS_STATE_SVG_TEXT_CORRESPONDENCE_DIRTY | NS_STATE_SVG_POSITIONING_DIRTY)))), 0))) { do { } while (false ); MOZ_ReportAssertionFailure("!HasAnyStateBits(NS_STATE_SVG_TEXT_CORRESPONDENCE_DIRTY | NS_STATE_SVG_POSITIONING_DIRTY)" " (" "How did this happen?" ")", "/var/lib/jenkins/workspace/firefox-scan-build/layout/svg/SVGTextFrame.cpp" , 3275); AnnotateMozCrashReason("MOZ_ASSERT" "(" "!HasAnyStateBits(NS_STATE_SVG_TEXT_CORRESPONDENCE_DIRTY | NS_STATE_SVG_POSITIONING_DIRTY)" ") (" "How did this happen?" ")"); do { *((volatile int*)__null ) = 3275; __attribute__((nomerge)) ::abort(); } while (false) ; } } while (false) |
3274 | NS_STATE_SVG_POSITIONING_DIRTY),do { static_assert( mozilla::detail::AssertionConditionType< decltype(!HasAnyStateBits(NS_STATE_SVG_TEXT_CORRESPONDENCE_DIRTY | NS_STATE_SVG_POSITIONING_DIRTY))>::isValid, "invalid assertion condition" ); if ((__builtin_expect(!!(!(!!(!HasAnyStateBits(NS_STATE_SVG_TEXT_CORRESPONDENCE_DIRTY | NS_STATE_SVG_POSITIONING_DIRTY)))), 0))) { do { } while (false ); MOZ_ReportAssertionFailure("!HasAnyStateBits(NS_STATE_SVG_TEXT_CORRESPONDENCE_DIRTY | NS_STATE_SVG_POSITIONING_DIRTY)" " (" "How did this happen?" ")", "/var/lib/jenkins/workspace/firefox-scan-build/layout/svg/SVGTextFrame.cpp" , 3275); AnnotateMozCrashReason("MOZ_ASSERT" "(" "!HasAnyStateBits(NS_STATE_SVG_TEXT_CORRESPONDENCE_DIRTY | NS_STATE_SVG_POSITIONING_DIRTY)" ") (" "How did this happen?" ")"); do { *((volatile int*)__null ) = 3275; __attribute__((nomerge)) ::abort(); } while (false) ; } } while (false) |
3275 | "How did this happen?")do { static_assert( mozilla::detail::AssertionConditionType< decltype(!HasAnyStateBits(NS_STATE_SVG_TEXT_CORRESPONDENCE_DIRTY | NS_STATE_SVG_POSITIONING_DIRTY))>::isValid, "invalid assertion condition" ); if ((__builtin_expect(!!(!(!!(!HasAnyStateBits(NS_STATE_SVG_TEXT_CORRESPONDENCE_DIRTY | NS_STATE_SVG_POSITIONING_DIRTY)))), 0))) { do { } while (false ); MOZ_ReportAssertionFailure("!HasAnyStateBits(NS_STATE_SVG_TEXT_CORRESPONDENCE_DIRTY | NS_STATE_SVG_POSITIONING_DIRTY)" " (" "How did this happen?" ")", "/var/lib/jenkins/workspace/firefox-scan-build/layout/svg/SVGTextFrame.cpp" , 3275); AnnotateMozCrashReason("MOZ_ASSERT" "(" "!HasAnyStateBits(NS_STATE_SVG_TEXT_CORRESPONDENCE_DIRTY | NS_STATE_SVG_POSITIONING_DIRTY)" ") (" "How did this happen?" ")"); do { *((volatile int*)__null ) = 3275; __attribute__((nomerge)) ::abort(); } while (false) ; } } while (false); |
3276 | return; |
3277 | } |
3278 | |
3279 | MaybeReflowAnonymousBlockChild(); |
3280 | UpdateGlyphPositioning(); |
3281 | |
3282 | nsPresContext* presContext = PresContext(); |
3283 | |
3284 | SVGBBox r; |
3285 | TextRenderedRunIterator it(this, TextRenderedRunIterator::eAllFrames); |
3286 | for (TextRenderedRun run = it.Current(); run.mFrame; run = it.Next()) { |
3287 | uint32_t runFlags = 0; |
3288 | if (!run.mFrame->StyleSVG()->mFill.kind.IsNone()) { |
3289 | runFlags |= TextRenderedRun::eIncludeFill; |
3290 | } |
3291 | if (SVGUtils::HasStroke(run.mFrame)) { |
3292 | runFlags |= TextRenderedRun::eIncludeStroke; |
3293 | } |
3294 | // Our "visual" overflow rect needs to be valid for building display lists |
3295 | // for hit testing, which means that for certain values of 'pointer-events' |
3296 | // it needs to include the geometry of the fill or stroke even when the |
3297 | // fill/ stroke don't actually render (e.g. when stroke="none" or |
3298 | // stroke-opacity="0"). GetGeometryHitTestFlags accounts for |
3299 | // 'pointer-events'. The text-shadow is not part of the hit-test area. |
3300 | uint16_t hitTestFlags = SVGUtils::GetGeometryHitTestFlags(run.mFrame); |
3301 | if (hitTestFlags & SVG_HIT_TEST_FILL0x01) { |
3302 | runFlags |= TextRenderedRun::eIncludeFill; |
3303 | } |
3304 | if (hitTestFlags & SVG_HIT_TEST_STROKE0x02) { |
3305 | runFlags |= TextRenderedRun::eIncludeStroke; |
3306 | } |
3307 | |
3308 | if (runFlags) { |
3309 | r.UnionEdges(run.GetUserSpaceRect(presContext, runFlags)); |
3310 | } |
3311 | } |
3312 | |
3313 | if (r.IsEmpty()) { |
3314 | mRect.SetEmpty(); |
3315 | } else { |
3316 | mRect = nsLayoutUtils::RoundGfxRectToAppRect(r.ToThebesRect(), |
3317 | AppUnitsPerCSSPixel()); |
3318 | |
3319 | // Due to rounding issues when we have a transform applied, we sometimes |
3320 | // don't include an additional row of pixels. For now, just inflate our |
3321 | // covered region. |
3322 | if (mLastContextScale != 0.0f) { |
3323 | mRect.Inflate( |
3324 | ceil(presContext->AppUnitsPerDevPixel() / mLastContextScale)); |
3325 | } |
3326 | } |
3327 | |
3328 | if (HasAnyStateBits(NS_FRAME_FIRST_REFLOW)) { |
3329 | // Make sure we have our filter property (if any) before calling |
3330 | // FinishAndStoreOverflow (subsequent filter changes are handled off |
3331 | // nsChangeHint_UpdateEffects): |
3332 | SVGObserverUtils::UpdateEffects(this); |
3333 | } |
3334 | |
3335 | // Now unset the various reflow bits. Do this before calling |
3336 | // FinishAndStoreOverflow since FinishAndStoreOverflow can require glyph |
3337 | // positions (to resolve transform-origin). |
3338 | RemoveStateBits(NS_FRAME_FIRST_REFLOW | NS_FRAME_IS_DIRTY | |
3339 | NS_FRAME_HAS_DIRTY_CHILDREN); |
3340 | |
3341 | nsRect overflow = nsRect(nsPoint(0, 0), mRect.Size()); |
3342 | OverflowAreas overflowAreas(overflow, overflow); |
3343 | FinishAndStoreOverflow(overflowAreas, mRect.Size()); |
3344 | } |
3345 | |
3346 | /** |
3347 | * Converts SVGUtils::eBBox* flags into TextRenderedRun flags appropriate |
3348 | * for the specified rendered run. |
3349 | */ |
3350 | static uint32_t TextRenderedRunFlagsForBBoxContribution( |
3351 | const TextRenderedRun& aRun, uint32_t aBBoxFlags) { |
3352 | uint32_t flags = 0; |
3353 | if ((aBBoxFlags & SVGUtils::eBBoxIncludeFillGeometry) || |
3354 | ((aBBoxFlags & SVGUtils::eBBoxIncludeFill) && |
3355 | !aRun.mFrame->StyleSVG()->mFill.kind.IsNone())) { |
3356 | flags |= TextRenderedRun::eIncludeFill; |
3357 | } |
3358 | if ((aBBoxFlags & SVGUtils::eBBoxIncludeStrokeGeometry) || |
3359 | ((aBBoxFlags & SVGUtils::eBBoxIncludeStroke) && |
3360 | SVGUtils::HasStroke(aRun.mFrame))) { |
3361 | flags |= TextRenderedRun::eIncludeStroke; |
3362 | } |
3363 | return flags; |
3364 | } |
3365 | |
3366 | SVGBBox SVGTextFrame::GetBBoxContribution(const Matrix& aToBBoxUserspace, |
3367 | uint32_t aFlags) { |
3368 | NS_ASSERTION(PrincipalChildList().FirstChild(), "must have a child frame")do { if (!(PrincipalChildList().FirstChild())) { NS_DebugBreak (NS_DEBUG_ASSERTION, "must have a child frame", "PrincipalChildList().FirstChild()" , "/var/lib/jenkins/workspace/firefox-scan-build/layout/svg/SVGTextFrame.cpp" , 3368); MOZ_PretendNoReturn(); } } while (0); |
3369 | SVGBBox bbox; |
3370 | |
3371 | if (aFlags & SVGUtils::eForGetClientRects) { |
3372 | Rect rect = NSRectToRect(mRect, AppUnitsPerCSSPixel()); |
3373 | if (!rect.IsEmpty()) { |
3374 | bbox = aToBBoxUserspace.TransformBounds(rect); |
3375 | } |
3376 | return bbox; |
3377 | } |
3378 | |
3379 | nsIFrame* kid = PrincipalChildList().FirstChild(); |
3380 | if (kid && kid->IsSubtreeDirty()) { |
3381 | // Return an empty bbox if our kid's subtree is dirty. This may be called |
3382 | // in that situation, e.g. when we're building a display list after an |
3383 | // interrupted reflow. This can also be called during reflow before we've |
3384 | // been reflowed, e.g. if an earlier sibling is calling |
3385 | // FinishAndStoreOverflow and needs our parent's perspective matrix, which |
3386 | // depends on the SVG bbox contribution of this frame. In the latter |
3387 | // situation, when all siblings have been reflowed, the parent will compute |
3388 | // its perspective and rerun FinishAndStoreOverflow for all its children. |
3389 | return bbox; |
3390 | } |
3391 | |
3392 | UpdateGlyphPositioning(); |
3393 | |
3394 | nsPresContext* presContext = PresContext(); |
3395 | |
3396 | TextRenderedRunIterator it(this); |
3397 | for (TextRenderedRun run = it.Current(); run.mFrame; run = it.Next()) { |
3398 | uint32_t flags = TextRenderedRunFlagsForBBoxContribution(run, aFlags); |
3399 | gfxMatrix m = ThebesMatrix(aToBBoxUserspace); |
3400 | SVGBBox bboxForRun = run.GetUserSpaceRect(presContext, flags, &m); |
3401 | bbox.UnionEdges(bboxForRun); |
3402 | } |
3403 | |
3404 | return bbox; |
3405 | } |
3406 | |
3407 | //---------------------------------------------------------------------- |
3408 | // SVGTextFrame SVG DOM methods |
3409 | |
3410 | /** |
3411 | * Returns whether the specified node has any non-empty Text |
3412 | * beneath it. |
3413 | */ |
3414 | static bool HasTextContent(nsIContent* aContent) { |
3415 | NS_ASSERTION(aContent, "expected non-null aContent")do { if (!(aContent)) { NS_DebugBreak(NS_DEBUG_ASSERTION, "expected non-null aContent" , "aContent", "/var/lib/jenkins/workspace/firefox-scan-build/layout/svg/SVGTextFrame.cpp" , 3415); MOZ_PretendNoReturn(); } } while (0); |
3416 | |
3417 | TextNodeIterator it(aContent); |
3418 | for (Text* text = it.Current(); text; text = it.Next()) { |
3419 | if (text->TextLength() != 0) { |
3420 | return true; |
3421 | } |
3422 | } |
3423 | return false; |
3424 | } |
3425 | |
3426 | /** |
3427 | * Returns the number of DOM characters beneath the specified node. |
3428 | */ |
3429 | static uint32_t GetTextContentLength(nsIContent* aContent) { |
3430 | NS_ASSERTION(aContent, "expected non-null aContent")do { if (!(aContent)) { NS_DebugBreak(NS_DEBUG_ASSERTION, "expected non-null aContent" , "aContent", "/var/lib/jenkins/workspace/firefox-scan-build/layout/svg/SVGTextFrame.cpp" , 3430); MOZ_PretendNoReturn(); } } while (0); |
3431 | |
3432 | uint32_t length = 0; |
3433 | TextNodeIterator it(aContent); |
3434 | for (Text* text = it.Current(); text; text = it.Next()) { |
3435 | length += text->TextLength(); |
3436 | } |
3437 | return length; |
3438 | } |
3439 | |
3440 | int32_t SVGTextFrame::ConvertTextElementCharIndexToAddressableIndex( |
3441 | int32_t aIndex, nsIContent* aContent) { |
3442 | CharIterator it(this, CharIterator::eOriginal, aContent); |
3443 | if (!it.AdvanceToSubtree()) { |
3444 | return -1; |
3445 | } |
3446 | int32_t result = 0; |
3447 | int32_t textElementCharIndex; |
3448 | while (!it.AtEnd() && it.IsWithinSubtree()) { |
3449 | bool addressable = !it.IsOriginalCharUnaddressable(); |
3450 | textElementCharIndex = it.TextElementCharIndex(); |
3451 | it.Next(); |
3452 | uint32_t delta = it.TextElementCharIndex() - textElementCharIndex; |
3453 | aIndex -= delta; |
3454 | if (addressable) { |
3455 | if (aIndex < 0) { |
3456 | return result; |
3457 | } |
3458 | result += delta; |
3459 | } |
3460 | } |
3461 | return -1; |
3462 | } |
3463 | |
3464 | /** |
3465 | * Implements the SVG DOM GetNumberOfChars method for the specified |
3466 | * text content element. |
3467 | */ |
3468 | uint32_t SVGTextFrame::GetNumberOfChars(nsIContent* aContent) { |
3469 | nsIFrame* kid = PrincipalChildList().FirstChild(); |
3470 | if (kid->IsSubtreeDirty()) { |
3471 | // We're never reflowed if we're under a non-SVG element that is |
3472 | // never reflowed (such as the HTML 'caption' element). |
3473 | return 0; |
3474 | } |
3475 | |
3476 | UpdateGlyphPositioning(); |
3477 | |
3478 | uint32_t n = 0; |
3479 | CharIterator it(this, CharIterator::eAddressable, aContent); |
3480 | if (it.AdvanceToSubtree()) { |
3481 | while (!it.AtEnd() && it.IsWithinSubtree()) { |
3482 | n++; |
3483 | it.Next(); |
3484 | } |
3485 | } |
3486 | return n; |
3487 | } |
3488 | |
3489 | /** |
3490 | * Implements the SVG DOM GetComputedTextLength method for the specified |
3491 | * text child element. |
3492 | */ |
3493 | float SVGTextFrame::GetComputedTextLength(nsIContent* aContent) { |
3494 | nsIFrame* kid = PrincipalChildList().FirstChild(); |
3495 | if (kid->IsSubtreeDirty()) { |
3496 | // We're never reflowed if we're under a non-SVG element that is |
3497 | // never reflowed (such as the HTML 'caption' element). |
3498 | // |
3499 | // If we ever decide that we need to return accurate values here, |
3500 | // we could do similar work to GetSubStringLength. |
3501 | return 0; |
3502 | } |
3503 | |
3504 | UpdateGlyphPositioning(); |
3505 | |
3506 | float cssPxPerDevPx = nsPresContext::AppUnitsToFloatCSSPixels( |
3507 | PresContext()->AppUnitsPerDevPixel()); |
3508 | |
3509 | nscoord length = 0; |
3510 | TextRenderedRunIterator it(this, TextRenderedRunIterator::eAllFrames, |
3511 | aContent); |
3512 | for (TextRenderedRun run = it.Current(); run.mFrame; run = it.Next()) { |
3513 | length += run.GetAdvanceWidth(); |
3514 | } |
3515 | |
3516 | return PresContext()->AppUnitsToGfxUnits(length) * cssPxPerDevPx * |
3517 | mLengthAdjustScaleFactor / mFontSizeScaleFactor; |
3518 | } |
3519 | |
3520 | /** |
3521 | * Implements the SVG DOM SelectSubString method for the specified |
3522 | * text content element. |
3523 | */ |
3524 | void SVGTextFrame::SelectSubString(nsIContent* aContent, uint32_t charnum, |
3525 | uint32_t nchars, ErrorResult& aRv) { |
3526 | nsIFrame* kid = PrincipalChildList().FirstChild(); |
3527 | if (kid->IsSubtreeDirty()) { |
3528 | // We're never reflowed if we're under a non-SVG element that is |
3529 | // never reflowed (such as the HTML 'caption' element). |
3530 | // XXXbz Should this just return without throwing like the no-frame case? |
3531 | aRv.ThrowInvalidStateError("No layout information available for SVG text"); |
3532 | return; |
3533 | } |
3534 | |
3535 | UpdateGlyphPositioning(); |
3536 | |
3537 | // Convert charnum/nchars from addressable characters relative to |
3538 | // aContent to global character indices. |
3539 | CharIterator chit(this, CharIterator::eAddressable, aContent); |
3540 | if (!chit.AdvanceToSubtree() || !chit.Next(charnum) || |
3541 | chit.IsAfterSubtree()) { |
3542 | aRv.ThrowIndexSizeError("Character index out of range"); |
3543 | return; |
3544 | } |
3545 | charnum = chit.TextElementCharIndex(); |
3546 | const RefPtr<nsIContent> content = chit.TextFrame()->GetContent(); |
3547 | chit.NextWithinSubtree(nchars); |
3548 | nchars = chit.TextElementCharIndex() - charnum; |
3549 | |
3550 | RefPtr<nsFrameSelection> frameSelection = GetFrameSelection(); |
3551 | |
3552 | frameSelection->HandleClick(content, charnum, charnum + nchars, |
3553 | nsFrameSelection::FocusMode::kCollapseToNewPoint, |
3554 | CaretAssociationHint::Before); |
3555 | } |
3556 | |
3557 | /** |
3558 | * For some content we cannot (or currently cannot) compute the length |
3559 | * without reflowing. In those cases we need to fall back to using |
3560 | * GetSubStringLengthSlowFallback. |
3561 | * |
3562 | * We fall back for textPath since we need glyph positioning in order to |
3563 | * tell if any characters should be ignored due to having fallen off the |
3564 | * end of the textPath. |
3565 | * |
3566 | * We fall back for bidi because GetTrimmedOffsets does not produce the |
3567 | * correct results for bidi continuations when passed aPostReflow = false. |
3568 | * XXX It may be possible to determine which continuations to trim from (and |
3569 | * which sides), but currently we don't do that. It would require us to |
3570 | * identify the visual (rather than logical) start and end of the line, to |
3571 | * avoid trimming at line-internal frame boundaries. Maybe nsBidiPresUtils |
3572 | * methods like GetFrameToRightOf and GetFrameToLeftOf would help? |
3573 | * |
3574 | */ |
3575 | bool SVGTextFrame::RequiresSlowFallbackForSubStringLength() { |
3576 | TextFrameIterator frameIter(this); |
3577 | for (nsTextFrame* frame = frameIter.Current(); frame; |
3578 | frame = frameIter.Next()) { |
3579 | if (frameIter.TextPathFrame() || frame->GetNextContinuation()) { |
3580 | return true; |
3581 | } |
3582 | } |
3583 | return false; |
3584 | } |
3585 | |
3586 | /** |
3587 | * Implements the SVG DOM GetSubStringLength method for the specified |
3588 | * text content element. |
3589 | */ |
3590 | float SVGTextFrame::GetSubStringLengthFastPath(nsIContent* aContent, |
3591 | uint32_t charnum, |
3592 | uint32_t nchars, |
3593 | ErrorResult& aRv) { |
3594 | MOZ_ASSERT(!RequiresSlowFallbackForSubStringLength())do { static_assert( mozilla::detail::AssertionConditionType< decltype(!RequiresSlowFallbackForSubStringLength())>::isValid , "invalid assertion condition"); if ((__builtin_expect(!!(!( !!(!RequiresSlowFallbackForSubStringLength()))), 0))) { do { } while (false); MOZ_ReportAssertionFailure("!RequiresSlowFallbackForSubStringLength()" , "/var/lib/jenkins/workspace/firefox-scan-build/layout/svg/SVGTextFrame.cpp" , 3594); AnnotateMozCrashReason("MOZ_ASSERT" "(" "!RequiresSlowFallbackForSubStringLength()" ")"); do { *((volatile int*)__null) = 3594; __attribute__((nomerge )) ::abort(); } while (false); } } while (false); |
3595 | |
3596 | // We only need our text correspondence to be up to date (no need to call |
3597 | // UpdateGlyphPositioning). |
3598 | TextNodeCorrespondenceRecorder::RecordCorrespondence(this); |
3599 | |
3600 | // Convert charnum/nchars from addressable characters relative to |
3601 | // aContent to global character indices. |
3602 | CharIterator chit(this, CharIterator::eAddressable, aContent, |
3603 | /* aPostReflow */ false); |
3604 | if (!chit.AdvanceToSubtree() || !chit.Next(charnum) || |
3605 | chit.IsAfterSubtree()) { |
3606 | aRv.ThrowIndexSizeError("Character index out of range"); |
3607 | return 0; |
3608 | } |
3609 | |
3610 | // We do this after the ThrowIndexSizeError() bit so JS calls correctly throw |
3611 | // when necessary. |
3612 | if (nchars == 0) { |
3613 | return 0.0f; |
3614 | } |
3615 | |
3616 | charnum = chit.TextElementCharIndex(); |
3617 | chit.NextWithinSubtree(nchars); |
3618 | nchars = chit.TextElementCharIndex() - charnum; |
3619 | |
3620 | // Sum of the substring advances. |
3621 | nscoord textLength = 0; |
3622 | |
3623 | TextFrameIterator frit(this); // aSubtree = nullptr |
3624 | |
3625 | // Index of the first non-skipped char in the frame, and of a subsequent char |
3626 | // that we're interested in. Both are relative to the index of the first |
3627 | // non-skipped char in the ancestor <text> element. |
3628 | uint32_t frameStartTextElementCharIndex = 0; |
3629 | uint32_t textElementCharIndex; |
3630 | |
3631 | for (nsTextFrame* frame = frit.Current(); frame; frame = frit.Next()) { |
3632 | frameStartTextElementCharIndex += frit.UndisplayedCharacters(); |
3633 | textElementCharIndex = frameStartTextElementCharIndex; |
3634 | |
3635 | // Offset into frame's Text: |
3636 | const uint32_t untrimmedOffset = frame->GetContentOffset(); |
3637 | const uint32_t untrimmedLength = frame->GetContentEnd() - untrimmedOffset; |
3638 | |
3639 | // Trim the offset/length to remove any leading/trailing white space. |
3640 | uint32_t trimmedOffset = untrimmedOffset; |
3641 | uint32_t trimmedLength = untrimmedLength; |
3642 | nsTextFrame::TrimmedOffsets trimmedOffsets = frame->GetTrimmedOffsets( |
3643 | frame->TextFragment(), nsTextFrame::TrimmedOffsetFlags::NotPostReflow); |
3644 | TrimOffsets(trimmedOffset, trimmedLength, trimmedOffsets); |
3645 | |
3646 | textElementCharIndex += trimmedOffset - untrimmedOffset; |
3647 | |
3648 | if (textElementCharIndex >= charnum + nchars) { |
3649 | break; // we're past the end of the substring |
3650 | } |
3651 | |
3652 | uint32_t offset = textElementCharIndex; |
3653 | |
3654 | // Intersect the substring we are interested in with the range covered by |
3655 | // the nsTextFrame. |
3656 | IntersectInterval(offset, trimmedLength, charnum, nchars); |
3657 | |
3658 | if (trimmedLength != 0) { |
3659 | // Convert offset into an index into the frame. |
3660 | offset += trimmedOffset - textElementCharIndex; |
3661 | |
3662 | gfxSkipCharsIterator it = frame->EnsureTextRun(nsTextFrame::eInflated); |
3663 | gfxTextRun* textRun = frame->GetTextRun(nsTextFrame::eInflated); |
3664 | nsTextFrame::PropertyProvider provider(frame, it); |
3665 | |
3666 | Range range = ConvertOriginalToSkipped(it, offset, trimmedLength); |
3667 | |
3668 | // Accumulate the advance. |
3669 | textLength += textRun->GetAdvanceWidth(range, &provider); |
3670 | } |
3671 | |
3672 | // Advance, ready for next call: |
3673 | frameStartTextElementCharIndex += untrimmedLength; |
3674 | } |
3675 | |
3676 | nsPresContext* presContext = PresContext(); |
3677 | float cssPxPerDevPx = nsPresContext::AppUnitsToFloatCSSPixels( |
3678 | presContext->AppUnitsPerDevPixel()); |
3679 | |
3680 | return presContext->AppUnitsToGfxUnits(textLength) * cssPxPerDevPx / |
3681 | mFontSizeScaleFactor; |
3682 | } |
3683 | |
3684 | float SVGTextFrame::GetSubStringLengthSlowFallback(nsIContent* aContent, |
3685 | uint32_t charnum, |
3686 | uint32_t nchars, |
3687 | ErrorResult& aRv) { |
3688 | UpdateGlyphPositioning(); |
3689 | |
3690 | // Convert charnum/nchars from addressable characters relative to |
3691 | // aContent to global character indices. |
3692 | CharIterator chit(this, CharIterator::eAddressable, aContent); |
3693 | if (!chit.AdvanceToSubtree() || !chit.Next(charnum) || |
3694 | chit.IsAfterSubtree()) { |
3695 | aRv.ThrowIndexSizeError("Character index out of range"); |
3696 | return 0; |
3697 | } |
3698 | |
3699 | if (nchars == 0) { |
3700 | return 0.0f; |
3701 | } |
3702 | |
3703 | charnum = chit.TextElementCharIndex(); |
3704 | chit.NextWithinSubtree(nchars); |
3705 | nchars = chit.TextElementCharIndex() - charnum; |
3706 | |
3707 | // Find each rendered run that intersects with the range defined |
3708 | // by charnum/nchars. |
3709 | nscoord textLength = 0; |
3710 | TextRenderedRunIterator runIter(this, TextRenderedRunIterator::eAllFrames); |
3711 | TextRenderedRun run = runIter.Current(); |
3712 | while (run.mFrame) { |
3713 | // If this rendered run is past the substring we are interested in, we |
3714 | // are done. |
3715 | uint32_t offset = run.mTextElementCharIndex; |
3716 | if (offset >= charnum + nchars) { |
3717 | break; |
3718 | } |
3719 | |
3720 | // Intersect the substring we are interested in with the range covered by |
3721 | // the rendered run. |
3722 | uint32_t length = run.mTextFrameContentLength; |
3723 | IntersectInterval(offset, length, charnum, nchars); |
3724 | |
3725 | if (length != 0) { |
3726 | // Convert offset into an index into the frame. |
3727 | offset += run.mTextFrameContentOffset - run.mTextElementCharIndex; |
3728 | |
3729 | gfxSkipCharsIterator it = |
3730 | run.mFrame->EnsureTextRun(nsTextFrame::eInflated); |
3731 | gfxTextRun* textRun = run.mFrame->GetTextRun(nsTextFrame::eInflated); |
3732 | nsTextFrame::PropertyProvider provider(run.mFrame, it); |
3733 | |
3734 | Range range = ConvertOriginalToSkipped(it, offset, length); |
3735 | |
3736 | // Accumulate the advance. |
3737 | textLength += textRun->GetAdvanceWidth(range, &provider); |
3738 | } |
3739 | |
3740 | run = runIter.Next(); |
3741 | } |
3742 | |
3743 | nsPresContext* presContext = PresContext(); |
3744 | float cssPxPerDevPx = nsPresContext::AppUnitsToFloatCSSPixels( |
3745 | presContext->AppUnitsPerDevPixel()); |
3746 | |
3747 | return presContext->AppUnitsToGfxUnits(textLength) * cssPxPerDevPx / |
3748 | mFontSizeScaleFactor; |
3749 | } |
3750 | |
3751 | /** |
3752 | * Implements the SVG DOM GetCharNumAtPosition method for the specified |
3753 | * text content element. |
3754 | */ |
3755 | int32_t SVGTextFrame::GetCharNumAtPosition(nsIContent* aContent, |
3756 | const DOMPointInit& aPoint) { |
3757 | nsIFrame* kid = PrincipalChildList().FirstChild(); |
3758 | if (kid->IsSubtreeDirty()) { |
3759 | // We're never reflowed if we're under a non-SVG element that is |
3760 | // never reflowed (such as the HTML 'caption' element). |
3761 | return -1; |
3762 | } |
3763 | |
3764 | UpdateGlyphPositioning(); |
3765 | |
3766 | nsPresContext* context = PresContext(); |
3767 | |
3768 | gfxPoint p(aPoint.mX, aPoint.mY); |
3769 | |
3770 | int32_t result = -1; |
3771 | |
3772 | TextRenderedRunIterator it(this, TextRenderedRunIterator::eAllFrames, |
3773 | aContent); |
3774 | for (TextRenderedRun run = it.Current(); run.mFrame; run = it.Next()) { |
3775 | // Hit test this rendered run. Later runs will override earlier ones. |
3776 | int32_t index = run.GetCharNumAtPosition(context, p); |
3777 | if (index != -1) { |
3778 | result = index + run.mTextElementCharIndex; |
3779 | } |
3780 | } |
3781 | |
3782 | if (result == -1) { |
3783 | return result; |
3784 | } |
3785 | |
3786 | return ConvertTextElementCharIndexToAddressableIndex(result, aContent); |
3787 | } |
3788 | |
3789 | /** |
3790 | * Implements the SVG DOM GetStartPositionOfChar method for the specified |
3791 | * text content element. |
3792 | */ |
3793 | already_AddRefed<DOMSVGPoint> SVGTextFrame::GetStartPositionOfChar( |
3794 | nsIContent* aContent, uint32_t aCharNum, ErrorResult& aRv) { |
3795 | nsIFrame* kid = PrincipalChildList().FirstChild(); |
3796 | if (kid->IsSubtreeDirty()) { |
3797 | // We're never reflowed if we're under a non-SVG element that is |
3798 | // never reflowed (such as the HTML 'caption' element). |
3799 | aRv.ThrowInvalidStateError("No layout information available for SVG text"); |
3800 | return nullptr; |
3801 | } |
3802 | |
3803 | UpdateGlyphPositioning(); |
3804 | |
3805 | CharIterator it(this, CharIterator::eAddressable, aContent); |
3806 | if (!it.AdvanceToSubtree() || !it.Next(aCharNum)) { |
3807 | aRv.ThrowIndexSizeError("Character index out of range"); |
3808 | return nullptr; |
3809 | } |
3810 | |
3811 | // We need to return the start position of the whole glyph. |
3812 | uint32_t startIndex = it.GlyphStartTextElementCharIndex(); |
3813 | |
3814 | return do_AddRef(new DOMSVGPoint(ToPoint(mPositions[startIndex].mPosition))); |
3815 | } |
3816 | |
3817 | /** |
3818 | * Returns the advance of the entire glyph whose starting character is at |
3819 | * aTextElementCharIndex. |
3820 | * |
3821 | * aIterator, if provided, must be a CharIterator that already points to |
3822 | * aTextElementCharIndex that is restricted to aContent and is using |
3823 | * filter mode eAddressable. |
3824 | */ |
3825 | static gfxFloat GetGlyphAdvance(SVGTextFrame* aFrame, nsIContent* aContent, |
3826 | uint32_t aTextElementCharIndex, |
3827 | CharIterator* aIterator) { |
3828 | MOZ_ASSERT(!aIterator || (aIterator->Filter() == CharIterator::eAddressable &&do { static_assert( mozilla::detail::AssertionConditionType< decltype(!aIterator || (aIterator->Filter() == CharIterator ::eAddressable && aIterator->GetSubtree() == aContent && aIterator->GlyphStartTextElementCharIndex() == aTextElementCharIndex))>::isValid, "invalid assertion condition" ); if ((__builtin_expect(!!(!(!!(!aIterator || (aIterator-> Filter() == CharIterator::eAddressable && aIterator-> GetSubtree() == aContent && aIterator->GlyphStartTextElementCharIndex () == aTextElementCharIndex)))), 0))) { do { } while (false); MOZ_ReportAssertionFailure("!aIterator || (aIterator->Filter() == CharIterator::eAddressable && aIterator->GetSubtree() == aContent && aIterator->GlyphStartTextElementCharIndex() == aTextElementCharIndex)" " (" "Invalid aIterator" ")", "/var/lib/jenkins/workspace/firefox-scan-build/layout/svg/SVGTextFrame.cpp" , 3832); AnnotateMozCrashReason("MOZ_ASSERT" "(" "!aIterator || (aIterator->Filter() == CharIterator::eAddressable && aIterator->GetSubtree() == aContent && aIterator->GlyphStartTextElementCharIndex() == aTextElementCharIndex)" ") (" "Invalid aIterator" ")"); do { *((volatile int*)__null ) = 3832; __attribute__((nomerge)) ::abort(); } while (false) ; } } while (false) |
3829 | aIterator->GetSubtree() == aContent &&do { static_assert( mozilla::detail::AssertionConditionType< decltype(!aIterator || (aIterator->Filter() == CharIterator ::eAddressable && aIterator->GetSubtree() == aContent && aIterator->GlyphStartTextElementCharIndex() == aTextElementCharIndex))>::isValid, "invalid assertion condition" ); if ((__builtin_expect(!!(!(!!(!aIterator || (aIterator-> Filter() == CharIterator::eAddressable && aIterator-> GetSubtree() == aContent && aIterator->GlyphStartTextElementCharIndex () == aTextElementCharIndex)))), 0))) { do { } while (false); MOZ_ReportAssertionFailure("!aIterator || (aIterator->Filter() == CharIterator::eAddressable && aIterator->GetSubtree() == aContent && aIterator->GlyphStartTextElementCharIndex() == aTextElementCharIndex)" " (" "Invalid aIterator" ")", "/var/lib/jenkins/workspace/firefox-scan-build/layout/svg/SVGTextFrame.cpp" , 3832); AnnotateMozCrashReason("MOZ_ASSERT" "(" "!aIterator || (aIterator->Filter() == CharIterator::eAddressable && aIterator->GetSubtree() == aContent && aIterator->GlyphStartTextElementCharIndex() == aTextElementCharIndex)" ") (" "Invalid aIterator" ")"); do { *((volatile int*)__null ) = 3832; __attribute__((nomerge)) ::abort(); } while (false) ; } } while (false) |
3830 | aIterator->GlyphStartTextElementCharIndex() ==do { static_assert( mozilla::detail::AssertionConditionType< decltype(!aIterator || (aIterator->Filter() == CharIterator ::eAddressable && aIterator->GetSubtree() == aContent && aIterator->GlyphStartTextElementCharIndex() == aTextElementCharIndex))>::isValid, "invalid assertion condition" ); if ((__builtin_expect(!!(!(!!(!aIterator || (aIterator-> Filter() == CharIterator::eAddressable && aIterator-> GetSubtree() == aContent && aIterator->GlyphStartTextElementCharIndex () == aTextElementCharIndex)))), 0))) { do { } while (false); MOZ_ReportAssertionFailure("!aIterator || (aIterator->Filter() == CharIterator::eAddressable && aIterator->GetSubtree() == aContent && aIterator->GlyphStartTextElementCharIndex() == aTextElementCharIndex)" " (" "Invalid aIterator" ")", "/var/lib/jenkins/workspace/firefox-scan-build/layout/svg/SVGTextFrame.cpp" , 3832); AnnotateMozCrashReason("MOZ_ASSERT" "(" "!aIterator || (aIterator->Filter() == CharIterator::eAddressable && aIterator->GetSubtree() == aContent && aIterator->GlyphStartTextElementCharIndex() == aTextElementCharIndex)" ") (" "Invalid aIterator" ")"); do { *((volatile int*)__null ) = 3832; __attribute__((nomerge)) ::abort(); } while (false) ; } } while (false) |
3831 | aTextElementCharIndex),do { static_assert( mozilla::detail::AssertionConditionType< decltype(!aIterator || (aIterator->Filter() == CharIterator ::eAddressable && aIterator->GetSubtree() == aContent && aIterator->GlyphStartTextElementCharIndex() == aTextElementCharIndex))>::isValid, "invalid assertion condition" ); if ((__builtin_expect(!!(!(!!(!aIterator || (aIterator-> Filter() == CharIterator::eAddressable && aIterator-> GetSubtree() == aContent && aIterator->GlyphStartTextElementCharIndex () == aTextElementCharIndex)))), 0))) { do { } while (false); MOZ_ReportAssertionFailure("!aIterator || (aIterator->Filter() == CharIterator::eAddressable && aIterator->GetSubtree() == aContent && aIterator->GlyphStartTextElementCharIndex() == aTextElementCharIndex)" " (" "Invalid aIterator" ")", "/var/lib/jenkins/workspace/firefox-scan-build/layout/svg/SVGTextFrame.cpp" , 3832); AnnotateMozCrashReason("MOZ_ASSERT" "(" "!aIterator || (aIterator->Filter() == CharIterator::eAddressable && aIterator->GetSubtree() == aContent && aIterator->GlyphStartTextElementCharIndex() == aTextElementCharIndex)" ") (" "Invalid aIterator" ")"); do { *((volatile int*)__null ) = 3832; __attribute__((nomerge)) ::abort(); } while (false) ; } } while (false) |
3832 | "Invalid aIterator")do { static_assert( mozilla::detail::AssertionConditionType< decltype(!aIterator || (aIterator->Filter() == CharIterator ::eAddressable && aIterator->GetSubtree() == aContent && aIterator->GlyphStartTextElementCharIndex() == aTextElementCharIndex))>::isValid, "invalid assertion condition" ); if ((__builtin_expect(!!(!(!!(!aIterator || (aIterator-> Filter() == CharIterator::eAddressable && aIterator-> GetSubtree() == aContent && aIterator->GlyphStartTextElementCharIndex () == aTextElementCharIndex)))), 0))) { do { } while (false); MOZ_ReportAssertionFailure("!aIterator || (aIterator->Filter() == CharIterator::eAddressable && aIterator->GetSubtree() == aContent && aIterator->GlyphStartTextElementCharIndex() == aTextElementCharIndex)" " (" "Invalid aIterator" ")", "/var/lib/jenkins/workspace/firefox-scan-build/layout/svg/SVGTextFrame.cpp" , 3832); AnnotateMozCrashReason("MOZ_ASSERT" "(" "!aIterator || (aIterator->Filter() == CharIterator::eAddressable && aIterator->GetSubtree() == aContent && aIterator->GlyphStartTextElementCharIndex() == aTextElementCharIndex)" ") (" "Invalid aIterator" ")"); do { *((volatile int*)__null ) = 3832; __attribute__((nomerge)) ::abort(); } while (false) ; } } while (false); |
3833 | |
3834 | Maybe<CharIterator> newIterator; |
3835 | CharIterator* it = aIterator; |
3836 | if (!it) { |
3837 | newIterator.emplace(aFrame, CharIterator::eAddressable, aContent); |
3838 | if (!newIterator->AdvanceToSubtree()) { |
3839 | MOZ_ASSERT_UNREACHABLE("Invalid aContent")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: " "Invalid aContent" ")", "/var/lib/jenkins/workspace/firefox-scan-build/layout/svg/SVGTextFrame.cpp" , 3839); AnnotateMozCrashReason("MOZ_ASSERT" "(" "false" ") (" "MOZ_ASSERT_UNREACHABLE: " "Invalid aContent" ")"); do { *(( volatile int*)__null) = 3839; __attribute__((nomerge)) ::abort (); } while (false); } } while (false); |
3840 | return 0.0; |
3841 | } |
3842 | it = newIterator.ptr(); |
3843 | } |
3844 | |
3845 | while (it->GlyphStartTextElementCharIndex() != aTextElementCharIndex) { |
3846 | if (!it->Next()) { |
3847 | MOZ_ASSERT_UNREACHABLE("Invalid aTextElementCharIndex")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: " "Invalid aTextElementCharIndex" ")", "/var/lib/jenkins/workspace/firefox-scan-build/layout/svg/SVGTextFrame.cpp" , 3847); AnnotateMozCrashReason("MOZ_ASSERT" "(" "false" ") (" "MOZ_ASSERT_UNREACHABLE: " "Invalid aTextElementCharIndex" ")" ); do { *((volatile int*)__null) = 3847; __attribute__((nomerge )) ::abort(); } while (false); } } while (false); |
3848 | return 0.0; |
3849 | } |
3850 | } |
3851 | |
3852 | if (it->AtEnd()) { |
3853 | MOZ_ASSERT_UNREACHABLE("Invalid aTextElementCharIndex")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: " "Invalid aTextElementCharIndex" ")", "/var/lib/jenkins/workspace/firefox-scan-build/layout/svg/SVGTextFrame.cpp" , 3853); AnnotateMozCrashReason("MOZ_ASSERT" "(" "false" ") (" "MOZ_ASSERT_UNREACHABLE: " "Invalid aTextElementCharIndex" ")" ); do { *((volatile int*)__null) = 3853; __attribute__((nomerge )) ::abort(); } while (false); } } while (false); |
3854 | return 0.0; |
3855 | } |
3856 | |
3857 | nsPresContext* presContext = aFrame->PresContext(); |
3858 | gfxFloat advance = 0.0; |
3859 | |
3860 | for (;;) { |
3861 | advance += it->GetAdvance(presContext); |
3862 | if (!it->Next() || |
3863 | it->GlyphStartTextElementCharIndex() != aTextElementCharIndex) { |
3864 | break; |
3865 | } |
3866 | } |
3867 | |
3868 | return advance; |
3869 | } |
3870 | |
3871 | /** |
3872 | * Implements the SVG DOM GetEndPositionOfChar method for the specified |
3873 | * text content element. |
3874 | */ |
3875 | already_AddRefed<DOMSVGPoint> SVGTextFrame::GetEndPositionOfChar( |
3876 | nsIContent* aContent, uint32_t aCharNum, ErrorResult& aRv) { |
3877 | nsIFrame* kid = PrincipalChildList().FirstChild(); |
3878 | if (kid->IsSubtreeDirty()) { |
3879 | // We're never reflowed if we're under a non-SVG element that is |
3880 | // never reflowed (such as the HTML 'caption' element). |
3881 | aRv.ThrowInvalidStateError("No layout information available for SVG text"); |
3882 | return nullptr; |
3883 | } |
3884 | |
3885 | UpdateGlyphPositioning(); |
3886 | |
3887 | CharIterator it(this, CharIterator::eAddressable, aContent); |
3888 | if (!it.AdvanceToSubtree() || !it.Next(aCharNum)) { |
3889 | aRv.ThrowIndexSizeError("Character index out of range"); |
3890 | return nullptr; |
3891 | } |
3892 | |
3893 | // We need to return the end position of the whole glyph. |
3894 | uint32_t startIndex = it.GlyphStartTextElementCharIndex(); |
3895 | |
3896 | // Get the advance of the glyph. |
3897 | gfxFloat advance = |
3898 | GetGlyphAdvance(this, aContent, startIndex, |
3899 | it.IsClusterAndLigatureGroupStart() ? &it : nullptr); |
3900 | if (it.TextRun()->IsRightToLeft()) { |
3901 | advance = -advance; |
3902 | } |
3903 | |
3904 | // The end position is the start position plus the advance in the direction |
3905 | // of the glyph's rotation. |
3906 | Matrix m = Matrix::Rotation(mPositions[startIndex].mAngle) * |
3907 | Matrix::Translation(ToPoint(mPositions[startIndex].mPosition)); |
3908 | Point p = m.TransformPoint(Point(advance / mFontSizeScaleFactor, 0)); |
3909 | |
3910 | return do_AddRef(new DOMSVGPoint(p)); |
3911 | } |
3912 | |
3913 | /** |
3914 | * Implements the SVG DOM GetExtentOfChar method for the specified |
3915 | * text content element. |
3916 | */ |
3917 | already_AddRefed<SVGRect> SVGTextFrame::GetExtentOfChar(nsIContent* aContent, |
3918 | uint32_t aCharNum, |
3919 | ErrorResult& aRv) { |
3920 | nsIFrame* kid = PrincipalChildList().FirstChild(); |
3921 | if (kid->IsSubtreeDirty()) { |
3922 | // We're never reflowed if we're under a non-SVG element that is |
3923 | // never reflowed (such as the HTML 'caption' element). |
3924 | aRv.ThrowInvalidStateError("No layout information available for SVG text"); |
3925 | return nullptr; |
3926 | } |
3927 | |
3928 | UpdateGlyphPositioning(); |
3929 | |
3930 | // Search for the character whose addressable index is aCharNum. |
3931 | CharIterator it(this, CharIterator::eAddressable, aContent); |
3932 | if (!it.AdvanceToSubtree() || !it.Next(aCharNum)) { |
3933 | aRv.ThrowIndexSizeError("Character index out of range"); |
3934 | return nullptr; |
3935 | } |
3936 | |
3937 | nsPresContext* presContext = PresContext(); |
3938 | float cssPxPerDevPx = nsPresContext::AppUnitsToFloatCSSPixels( |
3939 | presContext->AppUnitsPerDevPixel()); |
3940 | |
3941 | nsTextFrame* textFrame = it.TextFrame(); |
3942 | uint32_t startIndex = it.GlyphStartTextElementCharIndex(); |
3943 | bool isRTL = it.TextRun()->IsRightToLeft(); |
3944 | bool isVertical = it.TextRun()->IsVertical(); |
3945 | |
3946 | // Get the glyph advance. |
3947 | gfxFloat advance = |
3948 | GetGlyphAdvance(this, aContent, startIndex, |
3949 | it.IsClusterAndLigatureGroupStart() ? &it : nullptr); |
3950 | gfxFloat x = isRTL ? -advance : 0.0; |
3951 | |
3952 | // The ascent and descent gives the height of the glyph. |
3953 | gfxFloat ascent, descent; |
3954 | GetAscentAndDescentInAppUnits(textFrame, ascent, descent); |
3955 | |
3956 | // The horizontal extent is the origin of the glyph plus the advance |
3957 | // in the direction of the glyph's rotation. |
3958 | gfxMatrix m; |
3959 | m.PreTranslate(mPositions[startIndex].mPosition); |
3960 | m.PreRotate(mPositions[startIndex].mAngle); |
3961 | m.PreScale(1 / mFontSizeScaleFactor, 1 / mFontSizeScaleFactor); |
3962 | |
3963 | gfxRect glyphRect; |
3964 | if (isVertical) { |
3965 | glyphRect = gfxRect( |
3966 | -presContext->AppUnitsToGfxUnits(descent) * cssPxPerDevPx, x, |
3967 | presContext->AppUnitsToGfxUnits(ascent + descent) * cssPxPerDevPx, |
3968 | advance); |
3969 | } else { |
3970 | glyphRect = gfxRect( |
3971 | x, -presContext->AppUnitsToGfxUnits(ascent) * cssPxPerDevPx, advance, |
3972 | presContext->AppUnitsToGfxUnits(ascent + descent) * cssPxPerDevPx); |
3973 | } |
3974 | |
3975 | // Transform the glyph's rect into user space. |
3976 | gfxRect r = m.TransformBounds(glyphRect); |
3977 | |
3978 | return do_AddRef(new SVGRect(aContent, ToRect(r))); |
3979 | } |
3980 | |
3981 | /** |
3982 | * Implements the SVG DOM GetRotationOfChar method for the specified |
3983 | * text content element. |
3984 | */ |
3985 | float SVGTextFrame::GetRotationOfChar(nsIContent* aContent, uint32_t aCharNum, |
3986 | ErrorResult& aRv) { |
3987 | nsIFrame* kid = PrincipalChildList().FirstChild(); |
3988 | if (kid->IsSubtreeDirty()) { |
3989 | // We're never reflowed if we're under a non-SVG element that is |
3990 | // never reflowed (such as the HTML 'caption' element). |
3991 | aRv.ThrowInvalidStateError("No layout information available for SVG text"); |
3992 | return 0; |
3993 | } |
3994 | |
3995 | UpdateGlyphPositioning(); |
3996 | |
3997 | CharIterator it(this, CharIterator::eAddressable, aContent); |
3998 | if (!it.AdvanceToSubtree() || !it.Next(aCharNum)) { |
3999 | aRv.ThrowIndexSizeError("Character index out of range"); |
4000 | return 0; |
4001 | } |
4002 | |
4003 | // we need to account for the glyph's underlying orientation |
4004 | const gfxTextRun::GlyphRun& glyphRun = it.GlyphRun(); |
4005 | int32_t glyphOrientation = |
4006 | 90 * (glyphRun.IsSidewaysRight() - glyphRun.IsSidewaysLeft()); |
4007 | |
4008 | return mPositions[it.TextElementCharIndex()].mAngle * 180.0 / M_PI3.14159265358979323846 + |
4009 | glyphOrientation; |
4010 | } |
4011 | |
4012 | //---------------------------------------------------------------------- |
4013 | // SVGTextFrame text layout methods |
4014 | |
4015 | /** |
4016 | * Given the character position array before values have been filled in |
4017 | * to any unspecified positions, and an array of dx/dy values, returns whether |
4018 | * a character at a given index should start a new rendered run. |
4019 | * |
4020 | * @param aPositions The array of character positions before unspecified |
4021 | * positions have been filled in and dx/dy values have been added to them. |
4022 | * @param aDeltas The array of dx/dy values. |
4023 | * @param aIndex The character index in question. |
4024 | */ |
4025 | static bool ShouldStartRunAtIndex(const nsTArray<CharPosition>& aPositions, |
4026 | const nsTArray<gfxPoint>& aDeltas, |
4027 | uint32_t aIndex) { |
4028 | if (aIndex == 0) { |
4029 | return true; |
4030 | } |
4031 | |
4032 | if (aIndex < aPositions.Length()) { |
4033 | // If an explicit x or y value was given, start a new run. |
4034 | if (aPositions[aIndex].IsXSpecified() || |
4035 | aPositions[aIndex].IsYSpecified()) { |
4036 | return true; |
4037 | } |
4038 | |
4039 | // If a non-zero rotation was given, or the previous character had a non- |
4040 | // zero rotation, start a new run. |
4041 | if ((aPositions[aIndex].IsAngleSpecified() && |
4042 | aPositions[aIndex].mAngle != 0.0f) || |
4043 | (aPositions[aIndex - 1].IsAngleSpecified() && |
4044 | (aPositions[aIndex - 1].mAngle != 0.0f))) { |
4045 | return true; |
4046 | } |
4047 | } |
4048 | |
4049 | if (aIndex < aDeltas.Length()) { |
4050 | // If a non-zero dx or dy value was given, start a new run. |
4051 | if (aDeltas[aIndex].x != 0.0 || aDeltas[aIndex].y != 0.0) { |
4052 | return true; |
4053 | } |
4054 | } |
4055 | |
4056 | return false; |
4057 | } |
4058 | |
4059 | bool SVGTextFrame::ResolvePositionsForNode(nsIContent* aContent, |
4060 | uint32_t& aIndex, bool aInTextPath, |
4061 | bool& aForceStartOfChunk, |
4062 | nsTArray<gfxPoint>& aDeltas) { |
4063 | if (aContent->IsText()) { |
4064 | // We found a text node. |
4065 | uint32_t length = aContent->AsText()->TextLength(); |
4066 | if (length) { |
4067 | uint32_t end = aIndex + length; |
4068 | if (MOZ_UNLIKELY(end > mPositions.Length())(__builtin_expect(!!(end > mPositions.Length()), 0))) { |
4069 | MOZ_ASSERT_UNREACHABLE(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: " "length of mPositions does not match characters " "found by iterating content" ")", "/var/lib/jenkins/workspace/firefox-scan-build/layout/svg/SVGTextFrame.cpp" , 4071); AnnotateMozCrashReason("MOZ_ASSERT" "(" "false" ") (" "MOZ_ASSERT_UNREACHABLE: " "length of mPositions does not match characters " "found by iterating content" ")"); do { *((volatile int*)__null ) = 4071; __attribute__((nomerge)) ::abort(); } while (false) ; } } while (false) |
4070 | "length of mPositions does not match characters "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: " "length of mPositions does not match characters " "found by iterating content" ")", "/var/lib/jenkins/workspace/firefox-scan-build/layout/svg/SVGTextFrame.cpp" , 4071); AnnotateMozCrashReason("MOZ_ASSERT" "(" "false" ") (" "MOZ_ASSERT_UNREACHABLE: " "length of mPositions does not match characters " "found by iterating content" ")"); do { *((volatile int*)__null ) = 4071; __attribute__((nomerge)) ::abort(); } while (false) ; } } while (false) |
4071 | "found by iterating content")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: " "length of mPositions does not match characters " "found by iterating content" ")", "/var/lib/jenkins/workspace/firefox-scan-build/layout/svg/SVGTextFrame.cpp" , 4071); AnnotateMozCrashReason("MOZ_ASSERT" "(" "false" ") (" "MOZ_ASSERT_UNREACHABLE: " "length of mPositions does not match characters " "found by iterating content" ")"); do { *((volatile int*)__null ) = 4071; __attribute__((nomerge)) ::abort(); } while (false) ; } } while (false); |
4072 | return false; |
4073 | } |
4074 | if (aForceStartOfChunk) { |
4075 | // Note this character as starting a new anchored chunk. |
4076 | mPositions[aIndex].mStartOfChunk = true; |
4077 | aForceStartOfChunk = false; |
4078 | } |
4079 | while (aIndex < end) { |
4080 | // Record whether each of these characters should start a new rendered |
4081 | // run. That is always the case for characters on a text path. |
4082 | // |
4083 | // Run boundaries due to rotate="" values are handled in |
4084 | // DoGlyphPositioning. |
4085 | if (aInTextPath || ShouldStartRunAtIndex(mPositions, aDeltas, aIndex)) { |
4086 | mPositions[aIndex].mRunBoundary = true; |
4087 | } |
4088 | aIndex++; |
4089 | } |
4090 | } |
4091 | return true; |
4092 | } |
4093 | |
4094 | // Skip past elements that aren't text content elements. |
4095 | if (!IsTextContentElement(aContent)) { |
4096 | return true; |
4097 | } |
4098 | |
4099 | if (aContent->IsSVGElement(nsGkAtoms::textPath)) { |
4100 | // Any ‘y’ attributes on horizontal <textPath> elements are ignored. |
4101 | // Similarly, for vertical <texPath>s x attributes are ignored. |
4102 | // <textPath> elements behave as if they have x="0" y="0" on them, but only |
4103 | // if there is not a value for the non-ignored coordinate that got inherited |
4104 | // from a parent. We skip this if there is no text content, so that empty |
4105 | // <textPath>s don't interrupt the layout of text in the parent element. |
4106 | if (HasTextContent(aContent)) { |
4107 | if (MOZ_UNLIKELY(aIndex >= mPositions.Length())(__builtin_expect(!!(aIndex >= mPositions.Length()), 0))) { |
4108 | MOZ_ASSERT_UNREACHABLE(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: " "length of mPositions does not match characters " "found by iterating content" ")", "/var/lib/jenkins/workspace/firefox-scan-build/layout/svg/SVGTextFrame.cpp" , 4110); AnnotateMozCrashReason("MOZ_ASSERT" "(" "false" ") (" "MOZ_ASSERT_UNREACHABLE: " "length of mPositions does not match characters " "found by iterating content" ")"); do { *((volatile int*)__null ) = 4110; __attribute__((nomerge)) ::abort(); } while (false) ; } } while (false) |
4109 | "length of mPositions does not match characters "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: " "length of mPositions does not match characters " "found by iterating content" ")", "/var/lib/jenkins/workspace/firefox-scan-build/layout/svg/SVGTextFrame.cpp" , 4110); AnnotateMozCrashReason("MOZ_ASSERT" "(" "false" ") (" "MOZ_ASSERT_UNREACHABLE: " "length of mPositions does not match characters " "found by iterating content" ")"); do { *((volatile int*)__null ) = 4110; __attribute__((nomerge)) ::abort(); } while (false) ; } } while (false) |
4110 | "found by iterating content")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: " "length of mPositions does not match characters " "found by iterating content" ")", "/var/lib/jenkins/workspace/firefox-scan-build/layout/svg/SVGTextFrame.cpp" , 4110); AnnotateMozCrashReason("MOZ_ASSERT" "(" "false" ") (" "MOZ_ASSERT_UNREACHABLE: " "length of mPositions does not match characters " "found by iterating content" ")"); do { *((volatile int*)__null ) = 4110; __attribute__((nomerge)) ::abort(); } while (false) ; } } while (false); |
4111 | return false; |
4112 | } |
4113 | bool vertical = GetWritingMode().IsVertical(); |
4114 | if (vertical || !mPositions[aIndex].IsXSpecified()) { |
4115 | mPositions[aIndex].mPosition.x = 0.0; |
4116 | } |
4117 | if (!vertical || !mPositions[aIndex].IsYSpecified()) { |
4118 | mPositions[aIndex].mPosition.y = 0.0; |
4119 | } |
4120 | mPositions[aIndex].mStartOfChunk = true; |
4121 | } |
4122 | } else if (!aContent->IsSVGElement(nsGkAtoms::a)) { |
4123 | MOZ_ASSERT(aContent->IsSVGElement())do { static_assert( mozilla::detail::AssertionConditionType< decltype(aContent->IsSVGElement())>::isValid, "invalid assertion condition" ); if ((__builtin_expect(!!(!(!!(aContent->IsSVGElement()) )), 0))) { do { } while (false); MOZ_ReportAssertionFailure("aContent->IsSVGElement()" , "/var/lib/jenkins/workspace/firefox-scan-build/layout/svg/SVGTextFrame.cpp" , 4123); AnnotateMozCrashReason("MOZ_ASSERT" "(" "aContent->IsSVGElement()" ")"); do { *((volatile int*)__null) = 4123; __attribute__((nomerge )) ::abort(); } while (false); } } while (false); |
4124 | |
4125 | // We have a text content element that can have x/y/dx/dy/rotate attributes. |
4126 | SVGElement* element = static_cast<SVGElement*>(aContent); |
4127 | |
4128 | // Get x, y, dx, dy. |
4129 | SVGUserUnitList x, y, dx, dy; |
4130 | element->GetAnimatedLengthListValues(&x, &y, &dx, &dy, nullptr); |
4131 | |
4132 | // Get rotate. |
4133 | const SVGNumberList* rotate = nullptr; |
4134 | SVGAnimatedNumberList* animatedRotate = |
4135 | element->GetAnimatedNumberList(nsGkAtoms::rotate); |
4136 | if (animatedRotate) { |
4137 | rotate = &animatedRotate->GetAnimValue(); |
4138 | } |
4139 | |
4140 | bool percentages = false; |
4141 | uint32_t count = GetTextContentLength(aContent); |
4142 | |
4143 | if (MOZ_UNLIKELY(aIndex + count > mPositions.Length())(__builtin_expect(!!(aIndex + count > mPositions.Length()) , 0))) { |
4144 | MOZ_ASSERT_UNREACHABLE(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: " "length of mPositions does not match characters " "found by iterating content" ")", "/var/lib/jenkins/workspace/firefox-scan-build/layout/svg/SVGTextFrame.cpp" , 4146); AnnotateMozCrashReason("MOZ_ASSERT" "(" "false" ") (" "MOZ_ASSERT_UNREACHABLE: " "length of mPositions does not match characters " "found by iterating content" ")"); do { *((volatile int*)__null ) = 4146; __attribute__((nomerge)) ::abort(); } while (false) ; } } while (false) |
4145 | "length of mPositions does not match characters "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: " "length of mPositions does not match characters " "found by iterating content" ")", "/var/lib/jenkins/workspace/firefox-scan-build/layout/svg/SVGTextFrame.cpp" , 4146); AnnotateMozCrashReason("MOZ_ASSERT" "(" "false" ") (" "MOZ_ASSERT_UNREACHABLE: " "length of mPositions does not match characters " "found by iterating content" ")"); do { *((volatile int*)__null ) = 4146; __attribute__((nomerge)) ::abort(); } while (false) ; } } while (false) |
4146 | "found by iterating content")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: " "length of mPositions does not match characters " "found by iterating content" ")", "/var/lib/jenkins/workspace/firefox-scan-build/layout/svg/SVGTextFrame.cpp" , 4146); AnnotateMozCrashReason("MOZ_ASSERT" "(" "false" ") (" "MOZ_ASSERT_UNREACHABLE: " "length of mPositions does not match characters " "found by iterating content" ")"); do { *((volatile int*)__null ) = 4146; __attribute__((nomerge)) ::abort(); } while (false) ; } } while (false); |
4147 | return false; |
4148 | } |
4149 | |
4150 | // New text anchoring chunks start at each character assigned a position |
4151 | // with x="" or y="", or if we forced one with aForceStartOfChunk due to |
4152 | // being just after a <textPath>. |
4153 | uint32_t newChunkCount = std::max(x.Length(), y.Length()); |
4154 | if (!newChunkCount && aForceStartOfChunk) { |
4155 | newChunkCount = 1; |
4156 | } |
4157 | for (uint32_t i = 0, j = 0; i < newChunkCount && j < count; j++) { |
4158 | if (!mPositions[aIndex + j].mUnaddressable) { |
4159 | mPositions[aIndex + j].mStartOfChunk = true; |
4160 | i++; |
4161 | } |
4162 | } |
4163 | |
4164 | // Copy dx="" and dy="" values into aDeltas. |
4165 | if (!dx.IsEmpty() || !dy.IsEmpty()) { |
4166 | // Any unspecified deltas when we grow the array just get left as 0s. |
4167 | aDeltas.EnsureLengthAtLeast(aIndex + count); |
4168 | for (uint32_t i = 0, j = 0; i < dx.Length() && j < count; j++) { |
4169 | if (!mPositions[aIndex + j].mUnaddressable) { |
4170 | aDeltas[aIndex + j].x = dx[i]; |
4171 | percentages = percentages || dx.HasPercentageValueAt(i); |
4172 | i++; |
4173 | } |
4174 | } |
4175 | for (uint32_t i = 0, j = 0; i < dy.Length() && j < count; j++) { |
4176 | if (!mPositions[aIndex + j].mUnaddressable) { |
4177 | aDeltas[aIndex + j].y = dy[i]; |
4178 | percentages = percentages || dy.HasPercentageValueAt(i); |
4179 | i++; |
4180 | } |
4181 | } |
4182 | } |
4183 | |
4184 | // Copy x="" and y="" values. |
4185 | for (uint32_t i = 0, j = 0; i < x.Length() && j < count; j++) { |
4186 | if (!mPositions[aIndex + j].mUnaddressable) { |
4187 | mPositions[aIndex + j].mPosition.x = x[i]; |
4188 | percentages = percentages || x.HasPercentageValueAt(i); |
4189 | i++; |
4190 | } |
4191 | } |
4192 | for (uint32_t i = 0, j = 0; i < y.Length() && j < count; j++) { |
4193 | if (!mPositions[aIndex + j].mUnaddressable) { |
4194 | mPositions[aIndex + j].mPosition.y = y[i]; |
4195 | percentages = percentages || y.HasPercentageValueAt(i); |
4196 | i++; |
4197 | } |
4198 | } |
4199 | |
4200 | // Copy rotate="" values. |
4201 | if (rotate && !rotate->IsEmpty()) { |
4202 | uint32_t i = 0, j = 0; |
4203 | while (i < rotate->Length() && j < count) { |
4204 | if (!mPositions[aIndex + j].mUnaddressable) { |
4205 | mPositions[aIndex + j].mAngle = M_PI3.14159265358979323846 * (*rotate)[i] / 180.0; |
4206 | i++; |
4207 | } |
4208 | j++; |
4209 | } |
4210 | // Propagate final rotate="" value to the end of this element. |
4211 | while (j < count) { |
4212 | mPositions[aIndex + j].mAngle = mPositions[aIndex + j - 1].mAngle; |
4213 | j++; |
4214 | } |
4215 | } |
4216 | |
4217 | if (percentages) { |
4218 | AddStateBits(NS_STATE_SVG_POSITIONING_MAY_USE_PERCENTAGES); |
4219 | } |
4220 | } |
4221 | |
4222 | // Recurse to children. |
4223 | bool inTextPath = aInTextPath || aContent->IsSVGElement(nsGkAtoms::textPath); |
4224 | for (nsIContent* child = aContent->GetFirstChild(); child; |
4225 | child = child->GetNextSibling()) { |
4226 | bool ok = ResolvePositionsForNode(child, aIndex, inTextPath, |
4227 | aForceStartOfChunk, aDeltas); |
4228 | if (!ok) { |
4229 | return false; |
4230 | } |
4231 | } |
4232 | |
4233 | if (aContent->IsSVGElement(nsGkAtoms::textPath)) { |
4234 | // Force a new anchored chunk just after a <textPath>. |
4235 | aForceStartOfChunk = true; |
4236 | } |
4237 | |
4238 | return true; |
4239 | } |
4240 | |
4241 | bool SVGTextFrame::ResolvePositions(nsTArray<gfxPoint>& aDeltas, |
4242 | bool aRunPerGlyph) { |
4243 | NS_ASSERTION(mPositions.IsEmpty(), "expected mPositions to be empty")do { if (!(mPositions.IsEmpty())) { NS_DebugBreak(NS_DEBUG_ASSERTION , "expected mPositions to be empty", "mPositions.IsEmpty()", "/var/lib/jenkins/workspace/firefox-scan-build/layout/svg/SVGTextFrame.cpp" , 4243); MOZ_PretendNoReturn(); } } while (0); |
4244 | RemoveStateBits(NS_STATE_SVG_POSITIONING_MAY_USE_PERCENTAGES); |
4245 | |
4246 | CharIterator it(this, CharIterator::eOriginal, /* aSubtree */ nullptr); |
4247 | if (it.AtEnd()) { |
4248 | return false; |
4249 | } |
4250 | |
4251 | // We assume the first character position is (0,0) unless we later see |
4252 | // otherwise, and note it as unaddressable if it is. |
4253 | bool firstCharUnaddressable = it.IsOriginalCharUnaddressable(); |
4254 | mPositions.AppendElement(CharPosition::Unspecified(firstCharUnaddressable)); |
4255 | |
4256 | // Fill in unspecified positions for all remaining characters, noting |
4257 | // them as unaddressable if they are. |
4258 | uint32_t index = 0; |
4259 | while (it.Next()) { |
4260 | while (++index < it.TextElementCharIndex()) { |
4261 | mPositions.AppendElement(CharPosition::Unspecified(false)); |
4262 | } |
4263 | mPositions.AppendElement( |
4264 | CharPosition::Unspecified(it.IsOriginalCharUnaddressable())); |
4265 | } |
4266 | while (++index < it.TextElementCharIndex()) { |
4267 | mPositions.AppendElement(CharPosition::Unspecified(false)); |
4268 | } |
4269 | |
4270 | // Recurse over the content and fill in character positions as we go. |
4271 | bool forceStartOfChunk = false; |
4272 | index = 0; |
4273 | bool ok = ResolvePositionsForNode(mContent, index, aRunPerGlyph, |
4274 | forceStartOfChunk, aDeltas); |
4275 | return ok && index > 0; |
4276 | } |
4277 | |
4278 | void SVGTextFrame::DetermineCharPositions(nsTArray<nsPoint>& aPositions) { |
4279 | NS_ASSERTION(aPositions.IsEmpty(), "expected aPositions to be empty")do { if (!(aPositions.IsEmpty())) { NS_DebugBreak(NS_DEBUG_ASSERTION , "expected aPositions to be empty", "aPositions.IsEmpty()", "/var/lib/jenkins/workspace/firefox-scan-build/layout/svg/SVGTextFrame.cpp" , 4279); MOZ_PretendNoReturn(); } } while (0); |
4280 | |
4281 | nsPoint position; |
4282 | |
4283 | TextFrameIterator frit(this); |
4284 | for (nsTextFrame* frame = frit.Current(); frame; frame = frit.Next()) { |
4285 | gfxSkipCharsIterator it = frame->EnsureTextRun(nsTextFrame::eInflated); |
4286 | gfxTextRun* textRun = frame->GetTextRun(nsTextFrame::eInflated); |
4287 | nsTextFrame::PropertyProvider provider(frame, it); |
4288 | |
4289 | // Reset the position to the new frame's position. |
4290 | position = frit.Position(); |
4291 | if (textRun->IsVertical()) { |
4292 | if (textRun->IsRightToLeft()) { |
4293 | position.y += frame->GetRect().height; |
4294 | } |
4295 | position.x += GetBaselinePosition(frame, textRun, frit.DominantBaseline(), |
4296 | mFontSizeScaleFactor); |
4297 | } else { |
4298 | if (textRun->IsRightToLeft()) { |
4299 | position.x += frame->GetRect().width; |
4300 | } |
4301 | position.y += GetBaselinePosition(frame, textRun, frit.DominantBaseline(), |
4302 | mFontSizeScaleFactor); |
4303 | } |
4304 | |
4305 | // Any characters not in a frame, e.g. when display:none. |
4306 | for (uint32_t i = 0; i < frit.UndisplayedCharacters(); i++) { |
4307 | aPositions.AppendElement(position); |
4308 | } |
4309 | |
4310 | // Any white space characters trimmed at the start of the line of text. |
4311 | nsTextFrame::TrimmedOffsets trimmedOffsets = |
4312 | frame->GetTrimmedOffsets(frame->TextFragment()); |
4313 | while (it.GetOriginalOffset() < trimmedOffsets.mStart) { |
4314 | aPositions.AppendElement(position); |
4315 | it.AdvanceOriginal(1); |
4316 | } |
4317 | |
4318 | // Visible characters in the text frame. |
4319 | while (it.GetOriginalOffset() < frame->GetContentEnd()) { |
4320 | aPositions.AppendElement(position); |
4321 | if (!it.IsOriginalCharSkipped()) { |
4322 | // Accumulate partial ligature advance into position. (We must get |
4323 | // partial advances rather than get the advance of the whole ligature |
4324 | // group / cluster at once, since the group may span text frames, and |
4325 | // the PropertyProvider only has spacing information for the current |
4326 | // text frame.) |
4327 | uint32_t offset = it.GetSkippedOffset(); |
4328 | nscoord advance = |
4329 | textRun->GetAdvanceWidth(Range(offset, offset + 1), &provider); |
4330 | (textRun->IsVertical() ? position.y : position.x) += |
4331 | textRun->IsRightToLeft() ? -advance : advance; |
4332 | } |
4333 | it.AdvanceOriginal(1); |
4334 | } |
4335 | } |
4336 | |
4337 | // Finally any characters at the end that are not in a frame. |
4338 | for (uint32_t i = 0; i < frit.UndisplayedCharacters(); i++) { |
4339 | aPositions.AppendElement(position); |
4340 | } |
4341 | } |
4342 | |
4343 | /** |
4344 | * Physical text-anchor values. |
4345 | */ |
4346 | enum TextAnchorSide { eAnchorLeft, eAnchorMiddle, eAnchorRight }; |
4347 | |
4348 | /** |
4349 | * Converts a logical text-anchor value to its physical value, based on whether |
4350 | * it is for an RTL frame. |
4351 | */ |
4352 | static TextAnchorSide ConvertLogicalTextAnchorToPhysical( |
4353 | StyleTextAnchor aTextAnchor, bool aIsRightToLeft) { |
4354 | NS_ASSERTION(uint8_t(aTextAnchor) <= 3, "unexpected value for aTextAnchor")do { if (!(uint8_t(aTextAnchor) <= 3)) { NS_DebugBreak(NS_DEBUG_ASSERTION , "unexpected value for aTextAnchor", "uint8_t(aTextAnchor) <= 3" , "/var/lib/jenkins/workspace/firefox-scan-build/layout/svg/SVGTextFrame.cpp" , 4354); MOZ_PretendNoReturn(); } } while (0); |
4355 | if (!aIsRightToLeft) { |
4356 | return TextAnchorSide(uint8_t(aTextAnchor)); |
4357 | } |
4358 | return TextAnchorSide(2 - uint8_t(aTextAnchor)); |
4359 | } |
4360 | |
4361 | /** |
4362 | * Shifts the recorded character positions for an anchored chunk. |
4363 | * |
4364 | * @param aCharPositions The recorded character positions. |
4365 | * @param aChunkStart The character index the starts the anchored chunk. This |
4366 | * character's initial position is the anchor point. |
4367 | * @param aChunkEnd The character index just after the end of the anchored |
4368 | * chunk. |
4369 | * @param aVisIStartEdge The left/top-most edge of any of the glyphs within the |
4370 | * anchored chunk. |
4371 | * @param aVisIEndEdge The right/bottom-most edge of any of the glyphs within |
4372 | * the anchored chunk. |
4373 | * @param aAnchorSide The direction to anchor. |
4374 | */ |
4375 | static void ShiftAnchoredChunk(nsTArray<CharPosition>& aCharPositions, |
4376 | uint32_t aChunkStart, uint32_t aChunkEnd, |
4377 | gfxFloat aVisIStartEdge, gfxFloat aVisIEndEdge, |
4378 | TextAnchorSide aAnchorSide, bool aVertical) { |
4379 | NS_ASSERTION(aVisIStartEdge <= aVisIEndEdge,do { if (!(aVisIStartEdge <= aVisIEndEdge)) { NS_DebugBreak (NS_DEBUG_ASSERTION, "unexpected anchored chunk edges", "aVisIStartEdge <= aVisIEndEdge" , "/var/lib/jenkins/workspace/firefox-scan-build/layout/svg/SVGTextFrame.cpp" , 4380); MOZ_PretendNoReturn(); } } while (0) |
4380 | "unexpected anchored chunk edges")do { if (!(aVisIStartEdge <= aVisIEndEdge)) { NS_DebugBreak (NS_DEBUG_ASSERTION, "unexpected anchored chunk edges", "aVisIStartEdge <= aVisIEndEdge" , "/var/lib/jenkins/workspace/firefox-scan-build/layout/svg/SVGTextFrame.cpp" , 4380); MOZ_PretendNoReturn(); } } while (0); |
4381 | NS_ASSERTION(aChunkStart < aChunkEnd,do { if (!(aChunkStart < aChunkEnd)) { NS_DebugBreak(NS_DEBUG_ASSERTION , "unexpected values for aChunkStart and aChunkEnd", "aChunkStart < aChunkEnd" , "/var/lib/jenkins/workspace/firefox-scan-build/layout/svg/SVGTextFrame.cpp" , 4382); MOZ_PretendNoReturn(); } } while (0) |
4382 | "unexpected values for aChunkStart and aChunkEnd")do { if (!(aChunkStart < aChunkEnd)) { NS_DebugBreak(NS_DEBUG_ASSERTION , "unexpected values for aChunkStart and aChunkEnd", "aChunkStart < aChunkEnd" , "/var/lib/jenkins/workspace/firefox-scan-build/layout/svg/SVGTextFrame.cpp" , 4382); MOZ_PretendNoReturn(); } } while (0); |
4383 | |
4384 | gfxFloat shift = aVertical ? aCharPositions[aChunkStart].mPosition.y |
4385 | : aCharPositions[aChunkStart].mPosition.x; |
4386 | switch (aAnchorSide) { |
4387 | case eAnchorLeft: |
4388 | shift -= aVisIStartEdge; |
4389 | break; |
4390 | case eAnchorMiddle: |
4391 | shift -= (aVisIStartEdge + aVisIEndEdge) / 2; |
4392 | break; |
4393 | case eAnchorRight: |
4394 | shift -= aVisIEndEdge; |
4395 | break; |
4396 | default: |
4397 | MOZ_ASSERT_UNREACHABLE("unexpected value for aAnchorSide")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: " "unexpected value for aAnchorSide" ")", "/var/lib/jenkins/workspace/firefox-scan-build/layout/svg/SVGTextFrame.cpp" , 4397); AnnotateMozCrashReason("MOZ_ASSERT" "(" "false" ") (" "MOZ_ASSERT_UNREACHABLE: " "unexpected value for aAnchorSide" ")"); do { *((volatile int*)__null) = 4397; __attribute__((nomerge )) ::abort(); } while (false); } } while (false); |
4398 | } |
4399 | |
4400 | if (shift != 0.0) { |
4401 | if (aVertical) { |
4402 | for (uint32_t i = aChunkStart; i < aChunkEnd; i++) { |
4403 | aCharPositions[i].mPosition.y += shift; |
4404 | } |
4405 | } else { |
4406 | for (uint32_t i = aChunkStart; i < aChunkEnd; i++) { |
4407 | aCharPositions[i].mPosition.x += shift; |
4408 | } |
4409 | } |
4410 | } |
4411 | } |
4412 | |
4413 | void SVGTextFrame::AdjustChunksForLineBreaks() { |
4414 | nsBlockFrame* block = do_QueryFrame(PrincipalChildList().FirstChild()); |
4415 | NS_ASSERTION(block, "expected block frame")do { if (!(block)) { NS_DebugBreak(NS_DEBUG_ASSERTION, "expected block frame" , "block", "/var/lib/jenkins/workspace/firefox-scan-build/layout/svg/SVGTextFrame.cpp" , 4415); MOZ_PretendNoReturn(); } } while (0); |
4416 | |
4417 | nsBlockFrame::LineIterator line = block->LinesBegin(); |
4418 | |
4419 | CharIterator it(this, CharIterator::eOriginal, /* aSubtree */ nullptr); |
4420 | while (!it.AtEnd() && line != block->LinesEnd()) { |
4421 | if (it.TextFrame() == line->mFirstChild) { |
4422 | mPositions[it.TextElementCharIndex()].mStartOfChunk = true; |
4423 | line++; |
4424 | } |
4425 | it.AdvancePastCurrentFrame(); |
4426 | } |
4427 | } |
4428 | |
4429 | void SVGTextFrame::AdjustPositionsForClusters() { |
4430 | nsPresContext* presContext = PresContext(); |
4431 | |
4432 | // Find all of the characters that are in the middle of a cluster or |
4433 | // ligature group, and adjust their positions and rotations to match |
4434 | // the first character of the cluster/group. |
4435 | // |
4436 | // Also move the boundaries of text rendered runs and anchored chunks to |
4437 | // not lie in the middle of cluster/group. |
4438 | |
4439 | // The partial advance of the current cluster or ligature group that we |
4440 | // have accumulated. |
4441 | gfxFloat partialAdvance = 0.0; |
4442 | |
4443 | CharIterator it(this, CharIterator::eUnskipped, /* aSubtree */ nullptr); |
4444 | bool isFirst = true; |
4445 | while (!it.AtEnd()) { |
4446 | if (it.IsClusterAndLigatureGroupStart() || isFirst) { |
4447 | // If we're at the start of a new cluster or ligature group, reset our |
4448 | // accumulated partial advance. Also treat the beginning of the text as |
4449 | // an anchor, even if it is a combining character and therefore was |
4450 | // marked as being a Unicode cluster continuation. |
4451 | partialAdvance = 0.0; |
4452 | isFirst = false; |
4453 | } else { |
4454 | // Otherwise, we're in the middle of a cluster or ligature group, and |
4455 | // we need to use the currently accumulated partial advance to adjust |
4456 | // the character's position and rotation. |
4457 | |
4458 | // Find the start of the cluster/ligature group. |
4459 | uint32_t charIndex = it.TextElementCharIndex(); |
4460 | uint32_t startIndex = it.GlyphStartTextElementCharIndex(); |
4461 | MOZ_ASSERT(charIndex != startIndex,do { static_assert( mozilla::detail::AssertionConditionType< decltype(charIndex != startIndex)>::isValid, "invalid assertion condition" ); if ((__builtin_expect(!!(!(!!(charIndex != startIndex))), 0 ))) { do { } while (false); MOZ_ReportAssertionFailure("charIndex != startIndex" " (" "If the current character is in the middle of a cluster or " "ligature group, then charIndex must be different from " "startIndex" ")", "/var/lib/jenkins/workspace/firefox-scan-build/layout/svg/SVGTextFrame.cpp" , 4464); AnnotateMozCrashReason("MOZ_ASSERT" "(" "charIndex != startIndex" ") (" "If the current character is in the middle of a cluster or " "ligature group, then charIndex must be different from " "startIndex" ")"); do { *((volatile int*)__null) = 4464; __attribute__((nomerge )) ::abort(); } while (false); } } while (false) |
4462 | "If the current character is in the middle of a cluster or "do { static_assert( mozilla::detail::AssertionConditionType< decltype(charIndex != startIndex)>::isValid, "invalid assertion condition" ); if ((__builtin_expect(!!(!(!!(charIndex != startIndex))), 0 ))) { do { } while (false); MOZ_ReportAssertionFailure("charIndex != startIndex" " (" "If the current character is in the middle of a cluster or " "ligature group, then charIndex must be different from " "startIndex" ")", "/var/lib/jenkins/workspace/firefox-scan-build/layout/svg/SVGTextFrame.cpp" , 4464); AnnotateMozCrashReason("MOZ_ASSERT" "(" "charIndex != startIndex" ") (" "If the current character is in the middle of a cluster or " "ligature group, then charIndex must be different from " "startIndex" ")"); do { *((volatile int*)__null) = 4464; __attribute__((nomerge )) ::abort(); } while (false); } } while (false) |
4463 | "ligature group, then charIndex must be different from "do { static_assert( mozilla::detail::AssertionConditionType< decltype(charIndex != startIndex)>::isValid, "invalid assertion condition" ); if ((__builtin_expect(!!(!(!!(charIndex != startIndex))), 0 ))) { do { } while (false); MOZ_ReportAssertionFailure("charIndex != startIndex" " (" "If the current character is in the middle of a cluster or " "ligature group, then charIndex must be different from " "startIndex" ")", "/var/lib/jenkins/workspace/firefox-scan-build/layout/svg/SVGTextFrame.cpp" , 4464); AnnotateMozCrashReason("MOZ_ASSERT" "(" "charIndex != startIndex" ") (" "If the current character is in the middle of a cluster or " "ligature group, then charIndex must be different from " "startIndex" ")"); do { *((volatile int*)__null) = 4464; __attribute__((nomerge )) ::abort(); } while (false); } } while (false) |
4464 | "startIndex")do { static_assert( mozilla::detail::AssertionConditionType< decltype(charIndex != startIndex)>::isValid, "invalid assertion condition" ); if ((__builtin_expect(!!(!(!!(charIndex != startIndex))), 0 ))) { do { } while (false); MOZ_ReportAssertionFailure("charIndex != startIndex" " (" "If the current character is in the middle of a cluster or " "ligature group, then charIndex must be different from " "startIndex" ")", "/var/lib/jenkins/workspace/firefox-scan-build/layout/svg/SVGTextFrame.cpp" , 4464); AnnotateMozCrashReason("MOZ_ASSERT" "(" "charIndex != startIndex" ") (" "If the current character is in the middle of a cluster or " "ligature group, then charIndex must be different from " "startIndex" ")"); do { *((volatile int*)__null) = 4464; __attribute__((nomerge )) ::abort(); } while (false); } } while (false); |
4465 | |
4466 | mPositions[charIndex].mClusterOrLigatureGroupMiddle = true; |
4467 | |
4468 | // Don't allow different rotations on ligature parts. |
4469 | bool rotationAdjusted = false; |
4470 | double angle = mPositions[startIndex].mAngle; |
4471 | if (mPositions[charIndex].mAngle != angle) { |
4472 | mPositions[charIndex].mAngle = angle; |
4473 | rotationAdjusted = true; |
4474 | } |
4475 | |
4476 | // Update the character position. |
4477 | gfxFloat advance = partialAdvance / mFontSizeScaleFactor; |
4478 | gfxPoint direction = gfxPoint(cos(angle), sin(angle)) * |
4479 | (it.TextRun()->IsRightToLeft() ? -1.0 : 1.0); |
4480 | if (it.TextRun()->IsVertical()) { |
4481 | std::swap(direction.x, direction.y); |
4482 | } |
4483 | mPositions[charIndex].mPosition = |
4484 | mPositions[startIndex].mPosition + direction * advance; |
4485 | |
4486 | // Ensure any runs that would end in the middle of a ligature now end just |
4487 | // after the ligature. |
4488 | if (mPositions[charIndex].mRunBoundary) { |
4489 | mPositions[charIndex].mRunBoundary = false; |
4490 | if (charIndex + 1 < mPositions.Length()) { |
4491 | mPositions[charIndex + 1].mRunBoundary = true; |
4492 | } |
4493 | } else if (rotationAdjusted) { |
4494 | if (charIndex + 1 < mPositions.Length()) { |
4495 | mPositions[charIndex + 1].mRunBoundary = true; |
4496 | } |
4497 | } |
4498 | |
4499 | // Ensure any anchored chunks that would begin in the middle of a ligature |
4500 | // now begin just after the ligature. |
4501 | if (mPositions[charIndex].mStartOfChunk) { |
4502 | mPositions[charIndex].mStartOfChunk = false; |
4503 | if (charIndex + 1 < mPositions.Length()) { |
4504 | mPositions[charIndex + 1].mStartOfChunk = true; |
4505 | } |
4506 | } |
4507 | } |
4508 | |
4509 | // Accumulate the current character's partial advance. |
4510 | partialAdvance += it.GetAdvance(presContext); |
4511 | |
4512 | it.Next(); |
4513 | } |
4514 | } |
4515 | |
4516 | already_AddRefed<Path> SVGTextFrame::GetTextPath(nsIFrame* aTextPathFrame) { |
4517 | nsIContent* content = aTextPathFrame->GetContent(); |
4518 | SVGTextPathElement* tp = static_cast<SVGTextPathElement*>(content); |
4519 | if (tp->mPath.IsRendered()) { |
4520 | // This is just an attribute so there's no transform that can apply |
4521 | // so we can just return the path directly. |
4522 | return tp->mPath.GetAnimValue().BuildPathForMeasuring( |
4523 | aTextPathFrame->Style()->EffectiveZoom().ToFloat()); |
4524 | } |
4525 | |
4526 | SVGGeometryElement* geomElement = |
4527 | SVGObserverUtils::GetAndObserveTextPathsPath(aTextPathFrame); |
4528 | if (!geomElement) { |
4529 | return nullptr; |
4530 | } |
4531 | |
4532 | RefPtr<Path> path = geomElement->GetOrBuildPathForMeasuring(); |
4533 | if (!path) { |
4534 | return nullptr; |
4535 | } |
4536 | |
4537 | // Apply the geometry element's transform if appropriate. |
4538 | auto matrix = geomElement->LocalTransform(); |
4539 | if (!matrix.IsIdentity()) { |
4540 | RefPtr<PathBuilder> builder = path->TransformedCopyToBuilder(matrix); |
4541 | path = builder->Finish(); |
4542 | } |
4543 | |
4544 | return path.forget(); |
4545 | } |
4546 | |
4547 | gfxFloat SVGTextFrame::GetOffsetScale(nsIFrame* aTextPathFrame) { |
4548 | nsIContent* content = aTextPathFrame->GetContent(); |
4549 | SVGTextPathElement* tp = static_cast<SVGTextPathElement*>(content); |
4550 | if (tp->mPath.IsRendered()) { |
4551 | // A path attribute has no pathLength or transform |
4552 | // so we return a unit scale. |
4553 | return 1.0; |
4554 | } |
4555 | |
4556 | SVGGeometryElement* geomElement = |
4557 | SVGObserverUtils::GetAndObserveTextPathsPath(aTextPathFrame); |
4558 | if (!geomElement) { |
4559 | return 1.0; |
4560 | } |
4561 | return geomElement->GetPathLengthScale(SVGGeometryElement::eForTextPath); |
4562 | } |
4563 | |
4564 | gfxFloat SVGTextFrame::GetStartOffset(nsIFrame* aTextPathFrame) { |
4565 | SVGTextPathElement* tp = |
4566 | static_cast<SVGTextPathElement*>(aTextPathFrame->GetContent()); |
4567 | SVGAnimatedLength* length = |
4568 | &tp->mLengthAttributes[SVGTextPathElement::STARTOFFSET]; |
4569 | |
4570 | if (length->IsPercentage()) { |
4571 | if (!std::isfinite(GetOffsetScale(aTextPathFrame))) { |
4572 | // Either pathLength="0" for this path or the path has 0 length. |
4573 | return 0.0; |
4574 | } |
4575 | RefPtr<Path> data = GetTextPath(aTextPathFrame); |
4576 | return data ? length->GetAnimValInSpecifiedUnits() * data->ComputeLength() / |
4577 | 100.0 |
4578 | : 0.0; |
4579 | } |
4580 | float lengthValue = length->GetAnimValueWithZoom(tp); |
4581 | // If offsetScale is infinity we want to return 0 not NaN |
4582 | return lengthValue == 0 ? 0.0 : lengthValue * GetOffsetScale(aTextPathFrame); |
4583 | } |
4584 | |
4585 | void SVGTextFrame::DoTextPathLayout() { |
4586 | nsPresContext* context = PresContext(); |
4587 | |
4588 | CharIterator it(this, CharIterator::eOriginal, /* aSubtree */ nullptr); |
4589 | while (!it.AtEnd()) { |
4590 | nsIFrame* textPathFrame = it.TextPathFrame(); |
4591 | if (!textPathFrame) { |
4592 | // Skip past this frame if we're not in a text path. |
4593 | it.AdvancePastCurrentFrame(); |
4594 | continue; |
4595 | } |
4596 | |
4597 | // Get the path itself. |
4598 | RefPtr<Path> path = GetTextPath(textPathFrame); |
4599 | if (!path) { |
4600 | uint32_t start = it.TextElementCharIndex(); |
4601 | it.AdvancePastCurrentTextPathFrame(); |
4602 | uint32_t end = it.TextElementCharIndex(); |
4603 | for (uint32_t i = start; i < end; i++) { |
4604 | mPositions[i].mHidden = true; |
4605 | } |
4606 | continue; |
4607 | } |
4608 | |
4609 | SVGTextPathElement* textPath = |
4610 | static_cast<SVGTextPathElement*>(textPathFrame->GetContent()); |
4611 | uint16_t side = |
4612 | textPath->EnumAttributes()[SVGTextPathElement::SIDE].GetAnimValue(); |
4613 | |
4614 | gfxFloat offset = GetStartOffset(textPathFrame); |
4615 | Float pathLength = path->ComputeLength(); |
4616 | |
4617 | // If the first character within the text path is in the middle of a |
4618 | // cluster or ligature group, just skip it and don't apply text path |
4619 | // positioning. |
4620 | while (!it.AtEnd()) { |
4621 | if (it.IsOriginalCharSkipped()) { |
4622 | it.Next(); |
4623 | continue; |
4624 | } |
4625 | if (it.IsClusterAndLigatureGroupStart()) { |
4626 | break; |
4627 | } |
4628 | it.Next(); |
4629 | } |
4630 | |
4631 | bool skippedEndOfTextPath = false; |
4632 | |
4633 | // Loop for each character in the text path. |
4634 | while (!it.AtEnd() && it.TextPathFrame() && |
4635 | it.TextPathFrame()->GetContent() == textPath) { |
4636 | // The index of the cluster or ligature group's first character. |
4637 | uint32_t i = it.TextElementCharIndex(); |
4638 | |
4639 | // The index of the next character of the cluster or ligature. |
4640 | // We track this as we loop over the characters below so that we |
4641 | // can detect undisplayed characters and append entries into |
4642 | // partialAdvances for them. |
4643 | uint32_t j = i + 1; |
4644 | |
4645 | MOZ_ASSERT(!mPositions[i].mClusterOrLigatureGroupMiddle)do { static_assert( mozilla::detail::AssertionConditionType< decltype(!mPositions[i].mClusterOrLigatureGroupMiddle)>::isValid , "invalid assertion condition"); if ((__builtin_expect(!!(!( !!(!mPositions[i].mClusterOrLigatureGroupMiddle))), 0))) { do { } while (false); MOZ_ReportAssertionFailure("!mPositions[i].mClusterOrLigatureGroupMiddle" , "/var/lib/jenkins/workspace/firefox-scan-build/layout/svg/SVGTextFrame.cpp" , 4645); AnnotateMozCrashReason("MOZ_ASSERT" "(" "!mPositions[i].mClusterOrLigatureGroupMiddle" ")"); do { *((volatile int*)__null) = 4645; __attribute__((nomerge )) ::abort(); } while (false); } } while (false); |
4646 | |
4647 | gfxFloat sign = it.TextRun()->IsRightToLeft() ? -1.0 : 1.0; |
4648 | bool vertical = it.TextRun()->IsVertical(); |
4649 | |
4650 | // Compute cumulative advances for each character of the cluster or |
4651 | // ligature group. |
4652 | AutoTArray<gfxFloat, 4> partialAdvances; |
4653 | gfxFloat partialAdvance = it.GetAdvance(context); |
4654 | partialAdvances.AppendElement(partialAdvance); |
4655 | while (it.Next()) { |
4656 | // Append entries for any undisplayed characters the CharIterator |
4657 | // skipped over. |
4658 | MOZ_ASSERT(j <= it.TextElementCharIndex())do { static_assert( mozilla::detail::AssertionConditionType< decltype(j <= it.TextElementCharIndex())>::isValid, "invalid assertion condition" ); if ((__builtin_expect(!!(!(!!(j <= it.TextElementCharIndex ()))), 0))) { do { } while (false); MOZ_ReportAssertionFailure ("j <= it.TextElementCharIndex()", "/var/lib/jenkins/workspace/firefox-scan-build/layout/svg/SVGTextFrame.cpp" , 4658); AnnotateMozCrashReason("MOZ_ASSERT" "(" "j <= it.TextElementCharIndex()" ")"); do { *((volatile int*)__null) = 4658; __attribute__((nomerge )) ::abort(); } while (false); } } while (false); |
4659 | while (j < it.TextElementCharIndex()) { |
4660 | partialAdvances.AppendElement(partialAdvance); |
4661 | ++j; |
4662 | } |
4663 | // This loop may end up outside of the current text path, but |
4664 | // that's OK; we'll consider any complete cluster or ligature |
4665 | // group that begins inside the text path as being affected |
4666 | // by it. |
4667 | if (it.IsOriginalCharSkipped()) { |
4668 | if (!it.TextPathFrame()) { |
4669 | skippedEndOfTextPath = true; |
4670 | break; |
4671 | } |
4672 | // Leave partialAdvance unchanged. |
4673 | } else if (it.IsClusterAndLigatureGroupStart()) { |
4674 | break; |
4675 | } else { |
4676 | partialAdvance += it.GetAdvance(context); |
4677 | } |
4678 | partialAdvances.AppendElement(partialAdvance); |
4679 | } |
4680 | |
4681 | if (!skippedEndOfTextPath) { |
4682 | // Any final undisplayed characters the CharIterator skipped over. |
4683 | MOZ_ASSERT(j <= it.TextElementCharIndex())do { static_assert( mozilla::detail::AssertionConditionType< decltype(j <= it.TextElementCharIndex())>::isValid, "invalid assertion condition" ); if ((__builtin_expect(!!(!(!!(j <= it.TextElementCharIndex ()))), 0))) { do { } while (false); MOZ_ReportAssertionFailure ("j <= it.TextElementCharIndex()", "/var/lib/jenkins/workspace/firefox-scan-build/layout/svg/SVGTextFrame.cpp" , 4683); AnnotateMozCrashReason("MOZ_ASSERT" "(" "j <= it.TextElementCharIndex()" ")"); do { *((volatile int*)__null) = 4683; __attribute__((nomerge )) ::abort(); } while (false); } } while (false); |
4684 | while (j < it.TextElementCharIndex()) { |
4685 | partialAdvances.AppendElement(partialAdvance); |
4686 | ++j; |
4687 | } |
4688 | } |
4689 | |
4690 | gfxFloat halfAdvance = |
4691 | partialAdvances.LastElement() / mFontSizeScaleFactor / 2.0; |
4692 | gfxFloat midx = |
4693 | (vertical ? mPositions[i].mPosition.y : mPositions[i].mPosition.x) + |
4694 | sign * halfAdvance + offset; |
4695 | |
4696 | // Hide the character if it falls off the end of the path. |
4697 | mPositions[i].mHidden = midx < 0 || midx > pathLength; |
4698 | |
4699 | // Position the character on the path at the right angle. |
4700 | Point tangent; // Unit vector tangent to the point we find. |
4701 | Point pt; |
4702 | if (side == TEXTPATH_SIDETYPE_RIGHT) { |
4703 | pt = path->ComputePointAtLength(Float(pathLength - midx), &tangent); |
4704 | tangent = -tangent; |
4705 | } else { |
4706 | pt = path->ComputePointAtLength(Float(midx), &tangent); |
4707 | } |
4708 | Float rotation = vertical ? atan2f(-tangent.x, tangent.y) |
4709 | : atan2f(tangent.y, tangent.x); |
4710 | Point normal(-tangent.y, tangent.x); // Unit vector normal to the point. |
4711 | Point offsetFromPath = normal * (vertical ? -mPositions[i].mPosition.x |
4712 | : mPositions[i].mPosition.y); |
4713 | pt += offsetFromPath; |
4714 | Point direction = tangent * sign; |
4715 | mPositions[i].mPosition = |
4716 | ThebesPoint(pt) - ThebesPoint(direction) * halfAdvance; |
4717 | mPositions[i].mAngle += rotation; |
4718 | |
4719 | // Position any characters for a partial ligature. |
4720 | for (uint32_t k = i + 1; k < j; k++) { |
4721 | gfxPoint partialAdvance = ThebesPoint(direction) * |
4722 | partialAdvances[k - i] / mFontSizeScaleFactor; |
4723 | mPositions[k].mPosition = mPositions[i].mPosition + partialAdvance; |
4724 | mPositions[k].mAngle = mPositions[i].mAngle; |
4725 | mPositions[k].mHidden = mPositions[i].mHidden; |
4726 | } |
4727 | } |
4728 | } |
4729 | } |
4730 | |
4731 | void SVGTextFrame::DoAnchoring() { |
4732 | nsPresContext* presContext = PresContext(); |
4733 | |
4734 | CharIterator it(this, CharIterator::eOriginal, /* aSubtree */ nullptr); |
4735 | |
4736 | // Don't need to worry about skipped or trimmed characters. |
4737 | while (!it.AtEnd() && |
4738 | (it.IsOriginalCharSkipped() || it.IsOriginalCharTrimmed())) { |
4739 | it.Next(); |
4740 | } |
4741 | |
4742 | bool vertical = GetWritingMode().IsVertical(); |
4743 | for (uint32_t start = it.TextElementCharIndex(); start < mPositions.Length(); |
4744 | start = it.TextElementCharIndex()) { |
4745 | it.AdvanceToCharacter(start); |
4746 | nsTextFrame* chunkFrame = it.TextFrame(); |
4747 | |
4748 | // Measure characters in this chunk to find the left-most and right-most |
4749 | // edges of all glyphs within the chunk. |
4750 | uint32_t index = it.TextElementCharIndex(); |
4751 | uint32_t end = start; |
Value stored to 'end' during its initialization is never read | |
4752 | gfxFloat left = std::numeric_limits<gfxFloat>::infinity(); |
4753 | gfxFloat right = -std::numeric_limits<gfxFloat>::infinity(); |
4754 | do { |
4755 | if (!it.IsOriginalCharSkipped() && !it.IsOriginalCharTrimmed()) { |
4756 | gfxFloat advance = it.GetAdvance(presContext) / mFontSizeScaleFactor; |
4757 | gfxFloat pos = it.TextRun()->IsVertical() |
4758 | ? mPositions[index].mPosition.y |
4759 | : mPositions[index].mPosition.x; |
4760 | if (it.TextRun()->IsRightToLeft()) { |
4761 | left = std::min(left, pos - advance); |
4762 | right = std::max(right, pos); |
4763 | } else { |
4764 | left = std::min(left, pos); |
4765 | right = std::max(right, pos + advance); |
4766 | } |
4767 | } |
4768 | it.Next(); |
4769 | index = end = it.TextElementCharIndex(); |
4770 | } while (!it.AtEnd() && !mPositions[end].mStartOfChunk); |
4771 | |
4772 | if (left != std::numeric_limits<gfxFloat>::infinity()) { |
4773 | bool isRTL = |
4774 | chunkFrame->StyleVisibility()->mDirection == StyleDirection::Rtl; |
4775 | TextAnchorSide anchor = ConvertLogicalTextAnchorToPhysical( |
4776 | chunkFrame->StyleSVG()->mTextAnchor, isRTL); |
4777 | |
4778 | ShiftAnchoredChunk(mPositions, start, end, left, right, anchor, vertical); |
4779 | } |
4780 | } |
4781 | } |
4782 | |
4783 | void SVGTextFrame::DoGlyphPositioning() { |
4784 | mPositions.Clear(); |
4785 | RemoveStateBits(NS_STATE_SVG_POSITIONING_DIRTY); |
4786 | |
4787 | nsIFrame* kid = PrincipalChildList().FirstChild(); |
4788 | if (kid && kid->IsSubtreeDirty()) { |
4789 | MOZ_ASSERT(false, "should have already reflowed the kid")do { static_assert( mozilla::detail::AssertionConditionType< decltype(false)>::isValid, "invalid assertion condition"); if ((__builtin_expect(!!(!(!!(false))), 0))) { do { } while ( false); MOZ_ReportAssertionFailure("false" " (" "should have already reflowed the kid" ")", "/var/lib/jenkins/workspace/firefox-scan-build/layout/svg/SVGTextFrame.cpp" , 4789); AnnotateMozCrashReason("MOZ_ASSERT" "(" "false" ") (" "should have already reflowed the kid" ")"); do { *((volatile int*)__null) = 4789; __attribute__((nomerge)) ::abort(); } while (false); } } while (false); |
4790 | return; |
4791 | } |
4792 | |
4793 | // Since we can be called directly via GetBBoxContribution, our correspondence |
4794 | // may not be up to date. |
4795 | TextNodeCorrespondenceRecorder::RecordCorrespondence(this); |
4796 | |
4797 | // Determine the positions of each character in app units. |
4798 | AutoTArray<nsPoint, 64> charPositions; |
4799 | DetermineCharPositions(charPositions); |
4800 | |
4801 | if (charPositions.IsEmpty()) { |
4802 | // No characters, so nothing to do. |
4803 | return; |
4804 | } |
4805 | |
4806 | // If the textLength="" attribute was specified, then we need ResolvePositions |
4807 | // to record that a new run starts with each glyph. |
4808 | SVGTextContentElement* element = |
4809 | static_cast<SVGTextContentElement*>(GetContent()); |
4810 | SVGAnimatedLength* textLengthAttr = |
4811 | element->GetAnimatedLength(nsGkAtoms::textLength); |
4812 | uint16_t lengthAdjust = |
4813 | element->EnumAttributes()[SVGTextContentElement::LENGTHADJUST] |
4814 | .GetAnimValue(); |
4815 | bool adjustingTextLength = textLengthAttr->IsExplicitlySet(); |
4816 | float expectedTextLength = textLengthAttr->GetAnimValueWithZoom(element); |
4817 | |
4818 | if (adjustingTextLength && |
4819 | (expectedTextLength < 0.0f || lengthAdjust == LENGTHADJUST_UNKNOWN)) { |
4820 | // If textLength="" is less than zero or lengthAdjust is unknown, ignore it. |
4821 | adjustingTextLength = false; |
4822 | } |
4823 | |
4824 | // Get the x, y, dx, dy, rotate values for the subtree. |
4825 | AutoTArray<gfxPoint, 16> deltas; |
4826 | if (!ResolvePositions(deltas, adjustingTextLength)) { |
4827 | // If ResolvePositions returned false, it means either there were some |
4828 | // characters in the DOM but none of them are displayed, or there was |
4829 | // an error in processing mPositions. Clear out mPositions so that we don't |
4830 | // attempt to do any painting later. |
4831 | mPositions.Clear(); |
4832 | return; |
4833 | } |
4834 | |
4835 | // XXX We might be able to do less work when there is at most a single |
4836 | // x/y/dx/dy position. |
4837 | |
4838 | // Truncate the positioning arrays to the actual number of characters present. |
4839 | TruncateTo(deltas, charPositions); |
4840 | TruncateTo(mPositions, charPositions); |
4841 | |
4842 | // Fill in an unspecified position for the first addressable character. |
4843 | uint32_t first = 0; |
4844 | while (first + 1 < mPositions.Length() && mPositions[first].mUnaddressable) { |
4845 | ++first; |
4846 | } |
4847 | if (!mPositions[first].IsXSpecified()) { |
4848 | mPositions[first].mPosition.x = 0.0; |
4849 | } |
4850 | if (!mPositions[first].IsYSpecified()) { |
4851 | mPositions[first].mPosition.y = 0.0; |
4852 | } |
4853 | if (!mPositions[first].IsAngleSpecified()) { |
4854 | mPositions[first].mAngle = 0.0; |
4855 | } |
4856 | |
4857 | nsPresContext* presContext = PresContext(); |
4858 | bool vertical = GetWritingMode().IsVertical(); |
4859 | |
4860 | float cssPxPerDevPx = nsPresContext::AppUnitsToFloatCSSPixels( |
4861 | presContext->AppUnitsPerDevPixel()); |
4862 | double factor = cssPxPerDevPx / mFontSizeScaleFactor; |
4863 | |
4864 | // Determine how much to compress or expand glyph positions due to |
4865 | // textLength="" and lengthAdjust="". |
4866 | double adjustment = 0.0; |
4867 | mLengthAdjustScaleFactor = 1.0f; |
4868 | if (adjustingTextLength) { |
4869 | nscoord frameLength = |
4870 | vertical ? PrincipalChildList().FirstChild()->GetRect().height |
4871 | : PrincipalChildList().FirstChild()->GetRect().width; |
4872 | float actualTextLength = static_cast<float>( |
4873 | presContext->AppUnitsToGfxUnits(frameLength) * factor); |
4874 | |
4875 | switch (lengthAdjust) { |
4876 | case LENGTHADJUST_SPACINGANDGLYPHS: |
4877 | // Scale the glyphs and their positions. |
4878 | if (actualTextLength > 0) { |
4879 | mLengthAdjustScaleFactor = expectedTextLength / actualTextLength; |
4880 | } |
4881 | break; |
4882 | |
4883 | default: |
4884 | MOZ_ASSERT(lengthAdjust == LENGTHADJUST_SPACING)do { static_assert( mozilla::detail::AssertionConditionType< decltype(lengthAdjust == LENGTHADJUST_SPACING)>::isValid, "invalid assertion condition" ); if ((__builtin_expect(!!(!(!!(lengthAdjust == LENGTHADJUST_SPACING ))), 0))) { do { } while (false); MOZ_ReportAssertionFailure( "lengthAdjust == LENGTHADJUST_SPACING", "/var/lib/jenkins/workspace/firefox-scan-build/layout/svg/SVGTextFrame.cpp" , 4884); AnnotateMozCrashReason("MOZ_ASSERT" "(" "lengthAdjust == LENGTHADJUST_SPACING" ")"); do { *((volatile int*)__null) = 4884; __attribute__((nomerge )) ::abort(); } while (false); } } while (false); |
4885 | // Just add space between each glyph. |
4886 | int32_t adjustableSpaces = 0; |
4887 | for (uint32_t i = 1; i < mPositions.Length(); i++) { |
4888 | if (!mPositions[i].mUnaddressable) { |
4889 | adjustableSpaces++; |
4890 | } |
4891 | } |
4892 | if (adjustableSpaces) { |
4893 | adjustment = |
4894 | (expectedTextLength - actualTextLength) / adjustableSpaces; |
4895 | } |
4896 | break; |
4897 | } |
4898 | } |
4899 | |
4900 | // Fill in any unspecified character positions based on the positions recorded |
4901 | // in charPositions, and also add in the dx/dy values. |
4902 | if (!deltas.IsEmpty()) { |
4903 | mPositions[0].mPosition += deltas[0]; |
4904 | } |
4905 | |
4906 | gfxFloat xLengthAdjustFactor = vertical ? 1.0 : mLengthAdjustScaleFactor; |
4907 | gfxFloat yLengthAdjustFactor = vertical ? mLengthAdjustScaleFactor : 1.0; |
4908 | for (uint32_t i = 1; i < mPositions.Length(); i++) { |
4909 | // Fill in unspecified x position. |
4910 | if (!mPositions[i].IsXSpecified()) { |
4911 | nscoord d = charPositions[i].x - charPositions[i - 1].x; |
4912 | mPositions[i].mPosition.x = |
4913 | mPositions[i - 1].mPosition.x + |
4914 | presContext->AppUnitsToGfxUnits(d) * factor * xLengthAdjustFactor; |
4915 | if (!vertical && !mPositions[i].mUnaddressable) { |
4916 | mPositions[i].mPosition.x += adjustment; |
4917 | } |
4918 | } |
4919 | // Fill in unspecified y position. |
4920 | if (!mPositions[i].IsYSpecified()) { |
4921 | nscoord d = charPositions[i].y - charPositions[i - 1].y; |
4922 | mPositions[i].mPosition.y = |
4923 | mPositions[i - 1].mPosition.y + |
4924 | presContext->AppUnitsToGfxUnits(d) * factor * yLengthAdjustFactor; |
4925 | if (vertical && !mPositions[i].mUnaddressable) { |
4926 | mPositions[i].mPosition.y += adjustment; |
4927 | } |
4928 | } |
4929 | // Add in dx/dy. |
4930 | if (i < deltas.Length()) { |
4931 | mPositions[i].mPosition += deltas[i]; |
4932 | } |
4933 | // Fill in unspecified rotation values. |
4934 | if (!mPositions[i].IsAngleSpecified()) { |
4935 | mPositions[i].mAngle = 0.0f; |
4936 | } |
4937 | } |
4938 | |
4939 | MOZ_ASSERT(mPositions.Length() == charPositions.Length())do { static_assert( mozilla::detail::AssertionConditionType< decltype(mPositions.Length() == charPositions.Length())>:: isValid, "invalid assertion condition"); if ((__builtin_expect (!!(!(!!(mPositions.Length() == charPositions.Length()))), 0) )) { do { } while (false); MOZ_ReportAssertionFailure("mPositions.Length() == charPositions.Length()" , "/var/lib/jenkins/workspace/firefox-scan-build/layout/svg/SVGTextFrame.cpp" , 4939); AnnotateMozCrashReason("MOZ_ASSERT" "(" "mPositions.Length() == charPositions.Length()" ")"); do { *((volatile int*)__null) = 4939; __attribute__((nomerge )) ::abort(); } while (false); } } while (false); |
4940 | |
4941 | AdjustChunksForLineBreaks(); |
4942 | AdjustPositionsForClusters(); |
4943 | DoAnchoring(); |
4944 | DoTextPathLayout(); |
4945 | } |
4946 | |
4947 | bool SVGTextFrame::ShouldRenderAsPath(nsTextFrame* aFrame, |
4948 | bool& aShouldPaintSVGGlyphs) { |
4949 | // Rendering to a clip path. |
4950 | if (HasAnyStateBits(NS_STATE_SVG_CLIPPATH_CHILD)) { |
4951 | aShouldPaintSVGGlyphs = false; |
4952 | return true; |
4953 | } |
4954 | |
4955 | aShouldPaintSVGGlyphs = true; |
4956 | |
4957 | const nsStyleSVG* style = aFrame->StyleSVG(); |
4958 | |
4959 | // Fill is a non-solid paint or is not opaque. |
4960 | if (!(style->mFill.kind.IsNone() || |
4961 | (style->mFill.kind.IsColor() && |
4962 | SVGUtils::GetOpacity(style->mFillOpacity, /*aContextPaint*/ nullptr) == |
4963 | 1.0f))) { |
4964 | return true; |
4965 | } |
4966 | |
4967 | // If we're going to need to draw a non-opaque shadow. |
4968 | // It's possible nsTextFrame will support non-opaque shadows in the future, |
4969 | // in which case this test can be removed. |
4970 | if (style->mFill.kind.IsColor() && aFrame->StyleText()->HasTextShadow() && |
4971 | NS_GET_A(style->mFill.kind.AsColor().CalcColor(*aFrame->Style()))((uint8_t)(((style->mFill.kind.AsColor().CalcColor(*aFrame ->Style())) >> 24) & 0xff)) != |
4972 | 0xFF) { |
4973 | return true; |
4974 | } |
4975 | |
4976 | // Text has a stroke. |
4977 | if (style->HasStroke()) { |
4978 | if (style->mStrokeWidth.IsContextValue()) { |
4979 | return true; |
4980 | } |
4981 | if (SVGContentUtils::CoordToFloat( |
4982 | static_cast<SVGElement*>(GetContent()), |
4983 | style->mStrokeWidth.AsLengthPercentage()) > 0) { |
4984 | return true; |
4985 | } |
4986 | } |
4987 | |
4988 | return false; |
4989 | } |
4990 | |
4991 | void SVGTextFrame::ScheduleReflowSVG() { |
4992 | if (HasAnyStateBits(NS_FRAME_IS_NONDISPLAY)) { |
4993 | ScheduleReflowSVGNonDisplayText( |
4994 | IntrinsicDirty::FrameAncestorsAndDescendants); |
4995 | } else { |
4996 | SVGUtils::ScheduleReflowSVG(this); |
4997 | } |
4998 | } |
4999 | |
5000 | void SVGTextFrame::NotifyGlyphMetricsChange(bool aUpdateTextCorrespondence) { |
5001 | if (aUpdateTextCorrespondence) { |
5002 | AddStateBits(NS_STATE_SVG_TEXT_CORRESPONDENCE_DIRTY); |
5003 | } |
5004 | AddStateBits(NS_STATE_SVG_POSITIONING_DIRTY); |
5005 | nsLayoutUtils::PostRestyleEvent(mContent->AsElement(), RestyleHint{0}, |
5006 | nsChangeHint_InvalidateRenderingObservers); |
5007 | ScheduleReflowSVG(); |
5008 | } |
5009 | |
5010 | void SVGTextFrame::UpdateGlyphPositioning() { |
5011 | nsIFrame* kid = PrincipalChildList().FirstChild(); |
5012 | if (!kid) { |
5013 | return; |
5014 | } |
5015 | |
5016 | if (HasAnyStateBits(NS_STATE_SVG_POSITIONING_DIRTY)) { |
5017 | DoGlyphPositioning(); |
5018 | } |
5019 | } |
5020 | |
5021 | void SVGTextFrame::MaybeResolveBidiForAnonymousBlockChild() { |
5022 | nsIFrame* kid = PrincipalChildList().FirstChild(); |
5023 | |
5024 | if (kid && kid->HasAnyStateBits(NS_BLOCK_NEEDS_BIDI_RESOLUTION) && |
5025 | PresContext()->BidiEnabled()) { |
5026 | MOZ_ASSERT(static_cast<nsBlockFrame*>(do_QueryFrame(kid)),do { static_assert( mozilla::detail::AssertionConditionType< decltype(static_cast<nsBlockFrame*>(do_QueryFrame(kid)) )>::isValid, "invalid assertion condition"); if ((__builtin_expect (!!(!(!!(static_cast<nsBlockFrame*>(do_QueryFrame(kid)) ))), 0))) { do { } while (false); MOZ_ReportAssertionFailure( "static_cast<nsBlockFrame*>(do_QueryFrame(kid))" " (" "Expect anonymous child to be an nsBlockFrame" ")", "/var/lib/jenkins/workspace/firefox-scan-build/layout/svg/SVGTextFrame.cpp" , 5027); AnnotateMozCrashReason("MOZ_ASSERT" "(" "static_cast<nsBlockFrame*>(do_QueryFrame(kid))" ") (" "Expect anonymous child to be an nsBlockFrame" ")"); do { *((volatile int*)__null) = 5027; __attribute__((nomerge)) :: abort(); } while (false); } } while (false) |
5027 | "Expect anonymous child to be an nsBlockFrame")do { static_assert( mozilla::detail::AssertionConditionType< decltype(static_cast<nsBlockFrame*>(do_QueryFrame(kid)) )>::isValid, "invalid assertion condition"); if ((__builtin_expect (!!(!(!!(static_cast<nsBlockFrame*>(do_QueryFrame(kid)) ))), 0))) { do { } while (false); MOZ_ReportAssertionFailure( "static_cast<nsBlockFrame*>(do_QueryFrame(kid))" " (" "Expect anonymous child to be an nsBlockFrame" ")", "/var/lib/jenkins/workspace/firefox-scan-build/layout/svg/SVGTextFrame.cpp" , 5027); AnnotateMozCrashReason("MOZ_ASSERT" "(" "static_cast<nsBlockFrame*>(do_QueryFrame(kid))" ") (" "Expect anonymous child to be an nsBlockFrame" ")"); do { *((volatile int*)__null) = 5027; __attribute__((nomerge)) :: abort(); } while (false); } } while (false); |
5028 | nsBidiPresUtils::Resolve(static_cast<nsBlockFrame*>(kid)); |
5029 | } |
5030 | } |
5031 | |
5032 | void SVGTextFrame::MaybeReflowAnonymousBlockChild() { |
5033 | nsIFrame* kid = PrincipalChildList().FirstChild(); |
5034 | if (!kid) { |
5035 | return; |
5036 | } |
5037 | |
5038 | NS_ASSERTION(!kid->HasAnyStateBits(NS_FRAME_IN_REFLOW),do { if (!(!kid->HasAnyStateBits(NS_FRAME_IN_REFLOW))) { NS_DebugBreak (NS_DEBUG_ASSERTION, "should not be in reflow when about to reflow again" , "!kid->HasAnyStateBits(NS_FRAME_IN_REFLOW)", "/var/lib/jenkins/workspace/firefox-scan-build/layout/svg/SVGTextFrame.cpp" , 5039); MOZ_PretendNoReturn(); } } while (0) |
5039 | "should not be in reflow when about to reflow again")do { if (!(!kid->HasAnyStateBits(NS_FRAME_IN_REFLOW))) { NS_DebugBreak (NS_DEBUG_ASSERTION, "should not be in reflow when about to reflow again" , "!kid->HasAnyStateBits(NS_FRAME_IN_REFLOW)", "/var/lib/jenkins/workspace/firefox-scan-build/layout/svg/SVGTextFrame.cpp" , 5039); MOZ_PretendNoReturn(); } } while (0); |
5040 | |
5041 | if (IsSubtreeDirty()) { |
5042 | if (HasAnyStateBits(NS_FRAME_IS_DIRTY)) { |
5043 | // If we require a full reflow, ensure our kid is marked fully dirty. |
5044 | // (Note that our anonymous nsBlockFrame is not an ISVGDisplayableFrame, |
5045 | // so even when we are called via our ReflowSVG this will not be done for |
5046 | // us by SVGDisplayContainerFrame::ReflowSVG.) |
5047 | kid->MarkSubtreeDirty(); |
5048 | } |
5049 | |
5050 | // The RecordCorrespondence and DoReflow calls can result in new text frames |
5051 | // being created (due to bidi resolution or reflow). We set this bit to |
5052 | // guard against unnecessarily calling back in to |
5053 | // ScheduleReflowSVGNonDisplayText from nsIFrame::DidSetComputedStyle on |
5054 | // those new text frames. |
5055 | AddStateBits(NS_STATE_SVG_TEXT_IN_REFLOW); |
5056 | |
5057 | TextNodeCorrespondenceRecorder::RecordCorrespondence(this); |
5058 | |
5059 | MOZ_ASSERT(SVGUtils::AnyOuterSVGIsCallingReflowSVG(this),do { static_assert( mozilla::detail::AssertionConditionType< decltype(SVGUtils::AnyOuterSVGIsCallingReflowSVG(this))>:: isValid, "invalid assertion condition"); if ((__builtin_expect (!!(!(!!(SVGUtils::AnyOuterSVGIsCallingReflowSVG(this)))), 0) )) { do { } while (false); MOZ_ReportAssertionFailure("SVGUtils::AnyOuterSVGIsCallingReflowSVG(this)" " (" "should be under ReflowSVG" ")", "/var/lib/jenkins/workspace/firefox-scan-build/layout/svg/SVGTextFrame.cpp" , 5060); AnnotateMozCrashReason("MOZ_ASSERT" "(" "SVGUtils::AnyOuterSVGIsCallingReflowSVG(this)" ") (" "should be under ReflowSVG" ")"); do { *((volatile int *)__null) = 5060; __attribute__((nomerge)) ::abort(); } while (false); } } while (false) |
5060 | "should be under ReflowSVG")do { static_assert( mozilla::detail::AssertionConditionType< decltype(SVGUtils::AnyOuterSVGIsCallingReflowSVG(this))>:: isValid, "invalid assertion condition"); if ((__builtin_expect (!!(!(!!(SVGUtils::AnyOuterSVGIsCallingReflowSVG(this)))), 0) )) { do { } while (false); MOZ_ReportAssertionFailure("SVGUtils::AnyOuterSVGIsCallingReflowSVG(this)" " (" "should be under ReflowSVG" ")", "/var/lib/jenkins/workspace/firefox-scan-build/layout/svg/SVGTextFrame.cpp" , 5060); AnnotateMozCrashReason("MOZ_ASSERT" "(" "SVGUtils::AnyOuterSVGIsCallingReflowSVG(this)" ") (" "should be under ReflowSVG" ")"); do { *((volatile int *)__null) = 5060; __attribute__((nomerge)) ::abort(); } while (false); } } while (false); |
5061 | nsPresContext::InterruptPreventer noInterrupts(PresContext()); |
5062 | DoReflow(); |
5063 | |
5064 | RemoveStateBits(NS_STATE_SVG_TEXT_IN_REFLOW); |
5065 | } |
5066 | } |
5067 | |
5068 | void SVGTextFrame::DoReflow() { |
5069 | MOZ_ASSERT(HasAnyStateBits(NS_STATE_SVG_TEXT_IN_REFLOW))do { static_assert( mozilla::detail::AssertionConditionType< decltype(HasAnyStateBits(NS_STATE_SVG_TEXT_IN_REFLOW))>::isValid , "invalid assertion condition"); if ((__builtin_expect(!!(!( !!(HasAnyStateBits(NS_STATE_SVG_TEXT_IN_REFLOW)))), 0))) { do { } while (false); MOZ_ReportAssertionFailure("HasAnyStateBits(NS_STATE_SVG_TEXT_IN_REFLOW)" , "/var/lib/jenkins/workspace/firefox-scan-build/layout/svg/SVGTextFrame.cpp" , 5069); AnnotateMozCrashReason("MOZ_ASSERT" "(" "HasAnyStateBits(NS_STATE_SVG_TEXT_IN_REFLOW)" ")"); do { *((volatile int*)__null) = 5069; __attribute__((nomerge )) ::abort(); } while (false); } } while (false); |
5070 | |
5071 | // Since we are going to reflow the anonymous block frame, we will |
5072 | // need to update mPositions. |
5073 | // We also mark our text correspondence as dirty since we can end up needing |
5074 | // reflow in ways that do not set NS_STATE_SVG_TEXT_CORRESPONDENCE_DIRTY. |
5075 | // (We'd then fail the "expected a TextNodeCorrespondenceProperty" assertion |
5076 | // when UpdateGlyphPositioning() is called after we return.) |
5077 | AddStateBits(NS_STATE_SVG_TEXT_CORRESPONDENCE_DIRTY | |
5078 | NS_STATE_SVG_POSITIONING_DIRTY); |
5079 | |
5080 | if (HasAnyStateBits(NS_FRAME_IS_NONDISPLAY)) { |
5081 | // Normally, these dirty flags would be cleared in ReflowSVG(), but that |
5082 | // doesn't get called for non-display frames. We don't want to reflow our |
5083 | // descendants every time SVGTextFrame::PaintSVG makes sure that we have |
5084 | // valid positions by calling UpdateGlyphPositioning(), so we need to clear |
5085 | // these dirty bits. Note that this also breaks an invalidation loop where |
5086 | // our descendants invalidate as they reflow, which invalidates rendering |
5087 | // observers, which reschedules the frame that is currently painting by |
5088 | // referencing us to paint again. See bug 839958 comment 7. Hopefully we |
5089 | // will break that loop more convincingly at some point. |
5090 | RemoveStateBits(NS_FRAME_IS_DIRTY | NS_FRAME_HAS_DIRTY_CHILDREN); |
5091 | } |
5092 | |
5093 | nsPresContext* presContext = PresContext(); |
5094 | nsIFrame* kid = PrincipalChildList().FirstChild(); |
5095 | if (!kid) { |
5096 | return; |
5097 | } |
5098 | |
5099 | UniquePtr<gfxContext> renderingContext = |
5100 | presContext->PresShell()->CreateReferenceRenderingContext(); |
5101 | |
5102 | if (UpdateFontSizeScaleFactor()) { |
5103 | // If the font size scale factor changed, we need the block to report |
5104 | // an updated preferred width. |
5105 | kid->MarkIntrinsicISizesDirty(); |
5106 | } |
5107 | |
5108 | const IntrinsicSizeInput input(renderingContext.get(), Nothing(), Nothing()); |
5109 | nscoord inlineSize = kid->GetPrefISize(input); |
5110 | WritingMode wm = kid->GetWritingMode(); |
5111 | ReflowInput reflowInput(presContext, kid, renderingContext.get(), |
5112 | LogicalSize(wm, inlineSize, NS_UNCONSTRAINEDSIZE)); |
5113 | ReflowOutput desiredSize(reflowInput); |
5114 | nsReflowStatus status; |
5115 | |
5116 | NS_ASSERTION(do { if (!(reflowInput.ComputedPhysicalBorderPadding() == nsMargin (0, 0, 0, 0) && reflowInput.ComputedPhysicalMargin() == nsMargin(0, 0, 0, 0))) { NS_DebugBreak(NS_DEBUG_ASSERTION, "style system should ensure that :-moz-svg-text " "does not get styled", "reflowInput.ComputedPhysicalBorderPadding() == nsMargin(0, 0, 0, 0) && reflowInput.ComputedPhysicalMargin() == nsMargin(0, 0, 0, 0)" , "/var/lib/jenkins/workspace/firefox-scan-build/layout/svg/SVGTextFrame.cpp" , 5120); MOZ_PretendNoReturn(); } } while (0) |
5117 | reflowInput.ComputedPhysicalBorderPadding() == nsMargin(0, 0, 0, 0) &&do { if (!(reflowInput.ComputedPhysicalBorderPadding() == nsMargin (0, 0, 0, 0) && reflowInput.ComputedPhysicalMargin() == nsMargin(0, 0, 0, 0))) { NS_DebugBreak(NS_DEBUG_ASSERTION, "style system should ensure that :-moz-svg-text " "does not get styled", "reflowInput.ComputedPhysicalBorderPadding() == nsMargin(0, 0, 0, 0) && reflowInput.ComputedPhysicalMargin() == nsMargin(0, 0, 0, 0)" , "/var/lib/jenkins/workspace/firefox-scan-build/layout/svg/SVGTextFrame.cpp" , 5120); MOZ_PretendNoReturn(); } } while (0) |
5118 | reflowInput.ComputedPhysicalMargin() == nsMargin(0, 0, 0, 0),do { if (!(reflowInput.ComputedPhysicalBorderPadding() == nsMargin (0, 0, 0, 0) && reflowInput.ComputedPhysicalMargin() == nsMargin(0, 0, 0, 0))) { NS_DebugBreak(NS_DEBUG_ASSERTION, "style system should ensure that :-moz-svg-text " "does not get styled", "reflowInput.ComputedPhysicalBorderPadding() == nsMargin(0, 0, 0, 0) && reflowInput.ComputedPhysicalMargin() == nsMargin(0, 0, 0, 0)" , "/var/lib/jenkins/workspace/firefox-scan-build/layout/svg/SVGTextFrame.cpp" , 5120); MOZ_PretendNoReturn(); } } while (0) |
5119 | "style system should ensure that :-moz-svg-text "do { if (!(reflowInput.ComputedPhysicalBorderPadding() == nsMargin (0, 0, 0, 0) && reflowInput.ComputedPhysicalMargin() == nsMargin(0, 0, 0, 0))) { NS_DebugBreak(NS_DEBUG_ASSERTION, "style system should ensure that :-moz-svg-text " "does not get styled", "reflowInput.ComputedPhysicalBorderPadding() == nsMargin(0, 0, 0, 0) && reflowInput.ComputedPhysicalMargin() == nsMargin(0, 0, 0, 0)" , "/var/lib/jenkins/workspace/firefox-scan-build/layout/svg/SVGTextFrame.cpp" , 5120); MOZ_PretendNoReturn(); } } while (0) |
5120 | "does not get styled")do { if (!(reflowInput.ComputedPhysicalBorderPadding() == nsMargin (0, 0, 0, 0) && reflowInput.ComputedPhysicalMargin() == nsMargin(0, 0, 0, 0))) { NS_DebugBreak(NS_DEBUG_ASSERTION, "style system should ensure that :-moz-svg-text " "does not get styled", "reflowInput.ComputedPhysicalBorderPadding() == nsMargin(0, 0, 0, 0) && reflowInput.ComputedPhysicalMargin() == nsMargin(0, 0, 0, 0)" , "/var/lib/jenkins/workspace/firefox-scan-build/layout/svg/SVGTextFrame.cpp" , 5120); MOZ_PretendNoReturn(); } } while (0); |
5121 | |
5122 | kid->Reflow(presContext, desiredSize, reflowInput, status); |
5123 | kid->DidReflow(presContext, &reflowInput); |
5124 | kid->SetSize(wm, desiredSize.Size(wm)); |
5125 | } |
5126 | |
5127 | // Usable font size range in devpixels / user-units |
5128 | #define CLAMP_MIN_SIZE8.0 8.0 |
5129 | #define CLAMP_MAX_SIZE200.0 200.0 |
5130 | #define PRECISE_SIZE200.0 200.0 |
5131 | |
5132 | bool SVGTextFrame::UpdateFontSizeScaleFactor() { |
5133 | float contextScale = GetContextScale(this); |
5134 | mLastContextScale = contextScale; |
5135 | |
5136 | double oldFontSizeScaleFactor = mFontSizeScaleFactor; |
5137 | |
5138 | bool geometricPrecision = false; |
5139 | CSSCoord min = std::numeric_limits<float>::max(); |
5140 | CSSCoord max = std::numeric_limits<float>::min(); |
5141 | bool anyText = false; |
5142 | |
5143 | // Find the minimum and maximum font sizes used over all the |
5144 | // nsTextFrames. |
5145 | TextFrameIterator it(this); |
5146 | nsTextFrame* f = it.Current(); |
5147 | while (f) { |
5148 | if (!geometricPrecision) { |
5149 | // Unfortunately we can't treat text-rendering:geometricPrecision |
5150 | // separately for each text frame. |
5151 | geometricPrecision = f->StyleText()->mTextRendering == |
5152 | StyleTextRendering::Geometricprecision; |
5153 | } |
5154 | const auto& fontSize = f->StyleFont()->mFont.size; |
5155 | if (!fontSize.IsZero()) { |
5156 | min = std::min(min, fontSize.ToCSSPixels()); |
5157 | max = std::max(max, fontSize.ToCSSPixels()); |
5158 | anyText = true; |
5159 | } |
5160 | f = it.Next(); |
5161 | } |
5162 | |
5163 | if (!anyText) { |
5164 | // No text, so no need for scaling. |
5165 | mFontSizeScaleFactor = 1.0; |
5166 | return mFontSizeScaleFactor != oldFontSizeScaleFactor; |
5167 | } |
5168 | |
5169 | if (geometricPrecision) { |
5170 | // We want to ensure minSize is scaled to PRECISE_SIZE. |
5171 | mFontSizeScaleFactor = PRECISE_SIZE200.0 / min; |
5172 | return mFontSizeScaleFactor != oldFontSizeScaleFactor; |
5173 | } |
5174 | |
5175 | double minTextRunSize = min * contextScale; |
5176 | double maxTextRunSize = max * contextScale; |
5177 | |
5178 | if (minTextRunSize >= CLAMP_MIN_SIZE8.0 && maxTextRunSize <= CLAMP_MAX_SIZE200.0) { |
5179 | // We are already in the ideal font size range for all text frames, |
5180 | // so we only have to take into account the contextScale. |
5181 | mFontSizeScaleFactor = contextScale; |
5182 | } else if (max / min > CLAMP_MAX_SIZE200.0 / CLAMP_MIN_SIZE8.0) { |
5183 | // We can't scale the font sizes so that all of the text frames lie |
5184 | // within our ideal font size range. |
5185 | // Heuristically, if the maxTextRunSize is within the CLAMP_MAX_SIZE |
5186 | // as a reasonable value, it's likely to be the user's intent to |
5187 | // get a valid font for the maxTextRunSize one, we should honor it. |
5188 | // The same for minTextRunSize. |
5189 | if (maxTextRunSize <= CLAMP_MAX_SIZE200.0) { |
5190 | mFontSizeScaleFactor = CLAMP_MAX_SIZE200.0 / max; |
5191 | } else if (minTextRunSize >= CLAMP_MIN_SIZE8.0) { |
5192 | mFontSizeScaleFactor = CLAMP_MIN_SIZE8.0 / min; |
5193 | } else { |
5194 | // So maxTextRunSize is too big, minTextRunSize is too small, |
5195 | // we can't really do anything for this case, just leave it as is. |
5196 | mFontSizeScaleFactor = contextScale; |
5197 | } |
5198 | } else if (minTextRunSize < CLAMP_MIN_SIZE8.0) { |
5199 | mFontSizeScaleFactor = CLAMP_MIN_SIZE8.0 / min; |
5200 | } else { |
5201 | mFontSizeScaleFactor = CLAMP_MAX_SIZE200.0 / max; |
5202 | } |
5203 | |
5204 | return mFontSizeScaleFactor != oldFontSizeScaleFactor; |
5205 | } |
5206 | |
5207 | double SVGTextFrame::GetFontSizeScaleFactor() const { |
5208 | return mFontSizeScaleFactor; |
5209 | } |
5210 | |
5211 | /** |
5212 | * Take aPoint, which is in the <text> element's user space, and convert |
5213 | * it to the appropriate frame user space of aChildFrame according to |
5214 | * which rendered run the point hits. |
5215 | */ |
5216 | Point SVGTextFrame::TransformFramePointToTextChild( |
5217 | const Point& aPoint, const nsIFrame* aChildFrame) { |
5218 | NS_ASSERTION(aChildFrame && nsLayoutUtils::GetClosestFrameOfType(do { if (!(aChildFrame && nsLayoutUtils::GetClosestFrameOfType ( aChildFrame->GetParent(), LayoutFrameType::SVGText) == this )) { NS_DebugBreak(NS_DEBUG_ASSERTION, "aChildFrame must be a descendant of this frame" , "aChildFrame && nsLayoutUtils::GetClosestFrameOfType( aChildFrame->GetParent(), LayoutFrameType::SVGText) == this" , "/var/lib/jenkins/workspace/firefox-scan-build/layout/svg/SVGTextFrame.cpp" , 5221); MOZ_PretendNoReturn(); } } while (0) |
5219 | aChildFrame->GetParent(),do { if (!(aChildFrame && nsLayoutUtils::GetClosestFrameOfType ( aChildFrame->GetParent(), LayoutFrameType::SVGText) == this )) { NS_DebugBreak(NS_DEBUG_ASSERTION, "aChildFrame must be a descendant of this frame" , "aChildFrame && nsLayoutUtils::GetClosestFrameOfType( aChildFrame->GetParent(), LayoutFrameType::SVGText) == this" , "/var/lib/jenkins/workspace/firefox-scan-build/layout/svg/SVGTextFrame.cpp" , 5221); MOZ_PretendNoReturn(); } } while (0) |
5220 | LayoutFrameType::SVGText) == this,do { if (!(aChildFrame && nsLayoutUtils::GetClosestFrameOfType ( aChildFrame->GetParent(), LayoutFrameType::SVGText) == this )) { NS_DebugBreak(NS_DEBUG_ASSERTION, "aChildFrame must be a descendant of this frame" , "aChildFrame && nsLayoutUtils::GetClosestFrameOfType( aChildFrame->GetParent(), LayoutFrameType::SVGText) == this" , "/var/lib/jenkins/workspace/firefox-scan-build/layout/svg/SVGTextFrame.cpp" , 5221); MOZ_PretendNoReturn(); } } while (0) |
5221 | "aChildFrame must be a descendant of this frame")do { if (!(aChildFrame && nsLayoutUtils::GetClosestFrameOfType ( aChildFrame->GetParent(), LayoutFrameType::SVGText) == this )) { NS_DebugBreak(NS_DEBUG_ASSERTION, "aChildFrame must be a descendant of this frame" , "aChildFrame && nsLayoutUtils::GetClosestFrameOfType( aChildFrame->GetParent(), LayoutFrameType::SVGText) == this" , "/var/lib/jenkins/workspace/firefox-scan-build/layout/svg/SVGTextFrame.cpp" , 5221); MOZ_PretendNoReturn(); } } while (0); |
5222 | |
5223 | UpdateGlyphPositioning(); |
5224 | |
5225 | nsPresContext* presContext = PresContext(); |
5226 | |
5227 | // Add in the mRect offset to aPoint, as that will have been taken into |
5228 | // account when transforming the point from the ancestor frame down |
5229 | // to this one. |
5230 | float cssPxPerDevPx = nsPresContext::AppUnitsToFloatCSSPixels( |
5231 | presContext->AppUnitsPerDevPixel()); |
5232 | float factor = AppUnitsPerCSSPixel(); |
5233 | Point framePosition(NSAppUnitsToFloatPixels(mRect.x, factor), |
5234 | NSAppUnitsToFloatPixels(mRect.y, factor)); |
5235 | Point pointInUserSpace = aPoint * cssPxPerDevPx + framePosition; |
5236 | |
5237 | // Find the closest rendered run for the text frames beneath aChildFrame. |
5238 | TextRenderedRunIterator it(this, TextRenderedRunIterator::eAllFrames, |
5239 | aChildFrame); |
5240 | TextRenderedRun hit; |
5241 | gfxPoint pointInRun; |
5242 | nscoord dx = nscoord_MAX; |
5243 | nscoord dy = nscoord_MAX; |
5244 | for (TextRenderedRun run = it.Current(); run.mFrame; run = it.Next()) { |
5245 | uint32_t flags = TextRenderedRun::eIncludeFill | |
5246 | TextRenderedRun::eIncludeStroke | |
5247 | TextRenderedRun::eNoHorizontalOverflow; |
5248 | gfxRect runRect = |
5249 | run.GetRunUserSpaceRect(presContext, flags).ToThebesRect(); |
5250 | |
5251 | gfxMatrix m = run.GetTransformFromRunUserSpaceToUserSpace(presContext); |
5252 | if (!m.Invert()) { |
5253 | return aPoint; |
5254 | } |
5255 | gfxPoint pointInRunUserSpace = |
5256 | m.TransformPoint(ThebesPoint(pointInUserSpace)); |
5257 | |
5258 | if (Inside(runRect, pointInRunUserSpace)) { |
5259 | // The point was inside the rendered run's rect, so we choose it. |
5260 | dx = 0; |
5261 | dy = 0; |
5262 | pointInRun = pointInRunUserSpace; |
5263 | hit = run; |
5264 | } else if (nsLayoutUtils::PointIsCloserToRect(pointInRunUserSpace, runRect, |
5265 | dx, dy)) { |
5266 | // The point was closer to this rendered run's rect than any others |
5267 | // we've seen so far. |
5268 | pointInRun.x = |
5269 | clamped(pointInRunUserSpace.x.value, runRect.X(), runRect.XMost()); |
5270 | pointInRun.y = |
5271 | clamped(pointInRunUserSpace.y.value, runRect.Y(), runRect.YMost()); |
5272 | hit = run; |
5273 | } |
5274 | } |
5275 | |
5276 | if (!hit.mFrame) { |
5277 | // We didn't find any rendered runs for the frame. |
5278 | return aPoint; |
5279 | } |
5280 | |
5281 | // Return the point in user units relative to the nsTextFrame, |
5282 | // but taking into account mFontSizeScaleFactor. |
5283 | gfxMatrix m = hit.GetTransformFromRunUserSpaceToFrameUserSpace(presContext); |
5284 | m.PreScale(mFontSizeScaleFactor, mFontSizeScaleFactor); |
5285 | return ToPoint(m.TransformPoint(pointInRun) / cssPxPerDevPx); |
5286 | } |
5287 | |
5288 | /** |
5289 | * For each rendered run beneath aChildFrame, translate aRect from |
5290 | * aChildFrame to the run's text frame, transform it then into |
5291 | * the run's frame user space, intersect it with the run's |
5292 | * frame user space rect, then transform it up to user space. |
5293 | * The result is the union of all of these. |
5294 | */ |
5295 | gfxRect SVGTextFrame::TransformFrameRectFromTextChild( |
5296 | const nsRect& aRect, const nsIFrame* aChildFrame) { |
5297 | NS_ASSERTION(aChildFrame && nsLayoutUtils::GetClosestFrameOfType(do { if (!(aChildFrame && nsLayoutUtils::GetClosestFrameOfType ( aChildFrame->GetParent(), LayoutFrameType::SVGText) == this )) { NS_DebugBreak(NS_DEBUG_ASSERTION, "aChildFrame must be a descendant of this frame" , "aChildFrame && nsLayoutUtils::GetClosestFrameOfType( aChildFrame->GetParent(), LayoutFrameType::SVGText) == this" , "/var/lib/jenkins/workspace/firefox-scan-build/layout/svg/SVGTextFrame.cpp" , 5300); MOZ_PretendNoReturn(); } } while (0) |
5298 | aChildFrame->GetParent(),do { if (!(aChildFrame && nsLayoutUtils::GetClosestFrameOfType ( aChildFrame->GetParent(), LayoutFrameType::SVGText) == this )) { NS_DebugBreak(NS_DEBUG_ASSERTION, "aChildFrame must be a descendant of this frame" , "aChildFrame && nsLayoutUtils::GetClosestFrameOfType( aChildFrame->GetParent(), LayoutFrameType::SVGText) == this" , "/var/lib/jenkins/workspace/firefox-scan-build/layout/svg/SVGTextFrame.cpp" , 5300); MOZ_PretendNoReturn(); } } while (0) |
5299 | LayoutFrameType::SVGText) == this,do { if (!(aChildFrame && nsLayoutUtils::GetClosestFrameOfType ( aChildFrame->GetParent(), LayoutFrameType::SVGText) == this )) { NS_DebugBreak(NS_DEBUG_ASSERTION, "aChildFrame must be a descendant of this frame" , "aChildFrame && nsLayoutUtils::GetClosestFrameOfType( aChildFrame->GetParent(), LayoutFrameType::SVGText) == this" , "/var/lib/jenkins/workspace/firefox-scan-build/layout/svg/SVGTextFrame.cpp" , 5300); MOZ_PretendNoReturn(); } } while (0) |
5300 | "aChildFrame must be a descendant of this frame")do { if (!(aChildFrame && nsLayoutUtils::GetClosestFrameOfType ( aChildFrame->GetParent(), LayoutFrameType::SVGText) == this )) { NS_DebugBreak(NS_DEBUG_ASSERTION, "aChildFrame must be a descendant of this frame" , "aChildFrame && nsLayoutUtils::GetClosestFrameOfType( aChildFrame->GetParent(), LayoutFrameType::SVGText) == this" , "/var/lib/jenkins/workspace/firefox-scan-build/layout/svg/SVGTextFrame.cpp" , 5300); MOZ_PretendNoReturn(); } } while (0); |
5301 | |
5302 | UpdateGlyphPositioning(); |
5303 | |
5304 | nsPresContext* presContext = PresContext(); |
5305 | |
5306 | gfxRect result; |
5307 | TextRenderedRunIterator it(this, TextRenderedRunIterator::eAllFrames, |
5308 | aChildFrame); |
5309 | for (TextRenderedRun run = it.Current(); run.mFrame; run = it.Next()) { |
5310 | // First, translate aRect from aChildFrame to this run's frame. |
5311 | nsRect rectInTextFrame = aRect + aChildFrame->GetOffsetTo(run.mFrame); |
5312 | |
5313 | // Scale it into frame user space. |
5314 | gfxRect rectInFrameUserSpace = AppUnitsToFloatCSSPixels( |
5315 | gfxRect(rectInTextFrame.x, rectInTextFrame.y, rectInTextFrame.width, |
5316 | rectInTextFrame.height), |
5317 | presContext); |
5318 | |
5319 | // Intersect it with the run. |
5320 | uint32_t flags = |
5321 | TextRenderedRun::eIncludeFill | TextRenderedRun::eIncludeStroke; |
5322 | |
5323 | if (rectInFrameUserSpace.IntersectRect( |
5324 | rectInFrameUserSpace, |
5325 | run.GetFrameUserSpaceRect(presContext, flags).ToThebesRect())) { |
5326 | // Transform it up to user space of the <text> |
5327 | gfxMatrix m = run.GetTransformFromRunUserSpaceToUserSpace(presContext); |
5328 | gfxRect rectInUserSpace = m.TransformRect(rectInFrameUserSpace); |
5329 | |
5330 | // Union it into the result. |
5331 | result.UnionRect(result, rectInUserSpace); |
5332 | } |
5333 | } |
5334 | |
5335 | // Subtract the mRect offset from the result, as our user space for |
5336 | // this frame is relative to the top-left of mRect. |
5337 | float factor = AppUnitsPerCSSPixel(); |
5338 | gfxPoint framePosition(NSAppUnitsToFloatPixels(mRect.x, factor), |
5339 | NSAppUnitsToFloatPixels(mRect.y, factor)); |
5340 | |
5341 | return result - framePosition; |
5342 | } |
5343 | |
5344 | Rect SVGTextFrame::TransformFrameRectFromTextChild( |
5345 | const Rect& aRect, const nsIFrame* aChildFrame) { |
5346 | nscoord appUnitsPerDevPixel = PresContext()->AppUnitsPerDevPixel(); |
5347 | nsRect r = LayoutDevicePixel::ToAppUnits( |
5348 | LayoutDeviceRect::FromUnknownRect(aRect), appUnitsPerDevPixel); |
5349 | gfxRect resultCssUnits = TransformFrameRectFromTextChild(r, aChildFrame); |
5350 | float devPixelPerCSSPixel = |
5351 | float(AppUnitsPerCSSPixel()) / appUnitsPerDevPixel; |
5352 | resultCssUnits.Scale(devPixelPerCSSPixel); |
5353 | return ToRect(resultCssUnits); |
5354 | } |
5355 | |
5356 | Point SVGTextFrame::TransformFramePointFromTextChild( |
5357 | const Point& aPoint, const nsIFrame* aChildFrame) { |
5358 | return TransformFrameRectFromTextChild(Rect(aPoint, Size(1, 1)), aChildFrame) |
5359 | .TopLeft(); |
5360 | } |
5361 | |
5362 | void SVGTextFrame::AppendDirectlyOwnedAnonBoxes( |
5363 | nsTArray<OwnedAnonBox>& aResult) { |
5364 | MOZ_ASSERT(PrincipalChildList().FirstChild(), "Must have our anon box")do { static_assert( mozilla::detail::AssertionConditionType< decltype(PrincipalChildList().FirstChild())>::isValid, "invalid assertion condition" ); if ((__builtin_expect(!!(!(!!(PrincipalChildList().FirstChild ()))), 0))) { do { } while (false); MOZ_ReportAssertionFailure ("PrincipalChildList().FirstChild()" " (" "Must have our anon box" ")", "/var/lib/jenkins/workspace/firefox-scan-build/layout/svg/SVGTextFrame.cpp" , 5364); AnnotateMozCrashReason("MOZ_ASSERT" "(" "PrincipalChildList().FirstChild()" ") (" "Must have our anon box" ")"); do { *((volatile int*)__null ) = 5364; __attribute__((nomerge)) ::abort(); } while (false) ; } } while (false); |
5365 | aResult.AppendElement(OwnedAnonBox(PrincipalChildList().FirstChild())); |
5366 | } |
5367 | |
5368 | } // namespace mozilla |