| File: | root/firefox-clang/obj-x86_64-pc-linux-gnu/layout/svg/./../../../layout/svg/SVGTextFrame.cpp |
| Warning: | line 5102, column 14 Value stored to 'end' during its initialization is never read |
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| 1 | /* This Source Code Form is subject to the terms of the Mozilla Public |
| 2 | * License, v. 2.0. If a copy of the MPL was not distributed with this |
| 3 | * file, You can obtain one at http://mozilla.org/MPL/2.0/. */ |
| 4 | |
| 5 | // Main header first: |
| 6 | #include "SVGTextFrame.h" |
| 7 | |
| 8 | // Keep others in (case-insensitive) order: |
| 9 | #include <algorithm> |
| 10 | #include <cmath> |
| 11 | #include <limits> |
| 12 | #include <numbers> |
| 13 | #include <numeric> |
| 14 | |
| 15 | #include "DOMSVGPoint.h" |
| 16 | #include "SVGAnimatedNumberList.h" |
| 17 | #include "SVGContentUtils.h" |
| 18 | #include "SVGContextPaint.h" |
| 19 | #include "SVGLengthList.h" |
| 20 | #include "SVGNumberList.h" |
| 21 | #include "SVGPaintServerFrame.h" |
| 22 | #include "TextDrawTarget.h" |
| 23 | #include "gfx2DGlue.h" |
| 24 | #include "gfxContext.h" |
| 25 | #include "gfxFont.h" |
| 26 | #include "gfxSkipChars.h" |
| 27 | #include "gfxTypes.h" |
| 28 | #include "gfxUtils.h" |
| 29 | #include "mozilla/CaretAssociationHint.h" |
| 30 | #include "mozilla/DisplaySVGItem.h" |
| 31 | #include "mozilla/Likely.h" |
| 32 | #include "mozilla/PresShell.h" |
| 33 | #include "mozilla/ReflowInput.h" |
| 34 | #include "mozilla/SVGObserverUtils.h" |
| 35 | #include "mozilla/SVGOuterSVGFrame.h" |
| 36 | #include "mozilla/SVGUtils.h" |
| 37 | #include "mozilla/StaticPrefs_gfx.h" |
| 38 | #include "mozilla/dom/SVGGeometryElement.h" |
| 39 | #include "mozilla/dom/SVGRect.h" |
| 40 | #include "mozilla/dom/SVGTextContentElementBinding.h" |
| 41 | #include "mozilla/dom/SVGTextPathElement.h" |
| 42 | #include "mozilla/dom/SVGTextPathElementBinding.h" |
| 43 | #include "mozilla/dom/Selection.h" |
| 44 | #include "mozilla/dom/Text.h" |
| 45 | #include "mozilla/gfx/2D.h" |
| 46 | #include "mozilla/gfx/PatternHelpers.h" |
| 47 | #include "mozilla/layers/StackingContextHelper.h" |
| 48 | #include "mozilla/webrender/WebRenderAPI.h" |
| 49 | #include "nsBidiPresUtils.h" |
| 50 | #include "nsBlockFrame.h" |
| 51 | #include "nsCaret.h" |
| 52 | #include "nsContentUtils.h" |
| 53 | #include "nsFrameSelection.h" |
| 54 | #include "nsGkAtoms.h" |
| 55 | #include "nsLayoutUtils.h" |
| 56 | #include "nsStyleStructInlines.h" |
| 57 | #include "nsTArray.h" |
| 58 | #include "nsTHashSet.h" |
| 59 | #include "nsTextFrame.h" |
| 60 | |
| 61 | using namespace mozilla::dom; |
| 62 | using namespace mozilla::dom::SVGTextContentElement_Binding; |
| 63 | using namespace mozilla::gfx; |
| 64 | using namespace mozilla::image; |
| 65 | |
| 66 | namespace mozilla { |
| 67 | |
| 68 | // ============================================================================ |
| 69 | // Utility functions |
| 70 | |
| 71 | /** |
| 72 | * Using the specified gfxSkipCharsIterator, converts an offset and length |
| 73 | * in original char indexes to skipped char indexes. |
| 74 | * |
| 75 | * @param aIterator The gfxSkipCharsIterator to use for the conversion. |
| 76 | * @param aOriginalOffset The original offset. |
| 77 | * @param aOriginalLength The original length. |
| 78 | */ |
| 79 | static gfxTextRun::Range ConvertOriginalToSkipped( |
| 80 | gfxSkipCharsIterator& aIterator, uint32_t aOriginalOffset, |
| 81 | uint32_t aOriginalLength) { |
| 82 | uint32_t start = aIterator.ConvertOriginalToSkipped(aOriginalOffset); |
| 83 | aIterator.AdvanceOriginal(aOriginalLength); |
| 84 | return gfxTextRun::Range(start, aIterator.GetSkippedOffset()); |
| 85 | } |
| 86 | |
| 87 | /** |
| 88 | * Converts an nsPoint from app units to user space units using the specified |
| 89 | * nsPresContext and returns it as a gfxPoint. |
| 90 | */ |
| 91 | static gfxPoint AppUnitsToGfxUnits(const nsPoint& aPoint, |
| 92 | const nsPresContext* aContext) { |
| 93 | return gfxPoint(aContext->AppUnitsToGfxUnits(aPoint.x), |
| 94 | aContext->AppUnitsToGfxUnits(aPoint.y)); |
| 95 | } |
| 96 | |
| 97 | /** |
| 98 | * Converts a nsRect that is in app units to CSS pixels and returns it |
| 99 | * as a gfxRect. |
| 100 | */ |
| 101 | static gfxRect AppUnitsToFloatCSSPixels(const nsRect& aRect) { |
| 102 | return gfxRect(nsPresContext::AppUnitsToFloatCSSPixels(aRect.x), |
| 103 | nsPresContext::AppUnitsToFloatCSSPixels(aRect.y), |
| 104 | nsPresContext::AppUnitsToFloatCSSPixels(aRect.width), |
| 105 | nsPresContext::AppUnitsToFloatCSSPixels(aRect.height)); |
| 106 | } |
| 107 | |
| 108 | /** |
| 109 | * Gets the measured ascent and descent of the text in the given nsTextFrame |
| 110 | * in app units. |
| 111 | * |
| 112 | * @param aFrame The text frame. |
| 113 | * @param aAscent The ascent in app units (output). |
| 114 | * @param aDescent The descent in app units (output). |
| 115 | */ |
| 116 | static void GetAscentAndDescentInAppUnits(nsTextFrame* aFrame, |
| 117 | gfxFloat& aAscent, |
| 118 | gfxFloat& aDescent) { |
| 119 | gfxSkipCharsIterator it = aFrame->EnsureTextRun(nsTextFrame::eInflated); |
| 120 | gfxTextRun* textRun = aFrame->GetTextRun(nsTextFrame::eInflated); |
| 121 | |
| 122 | gfxTextRun::Range range = ConvertOriginalToSkipped( |
| 123 | it, aFrame->GetContentOffset(), aFrame->GetContentLength()); |
| 124 | |
| 125 | textRun->GetLineHeightMetrics(range, aAscent, aDescent); |
| 126 | } |
| 127 | |
| 128 | /** |
| 129 | * Updates an interval by intersecting it with another interval. |
| 130 | * The intervals are specified using a start index and a length. |
| 131 | */ |
| 132 | static void IntersectInterval(uint32_t& aStart, uint32_t& aLength, |
| 133 | uint32_t aStartOther, uint32_t aLengthOther) { |
| 134 | uint32_t aEnd = aStart + aLength; |
| 135 | uint32_t aEndOther = aStartOther + aLengthOther; |
| 136 | |
| 137 | if (aStartOther >= aEnd || aStart >= aEndOther) { |
| 138 | aLength = 0; |
| 139 | } else { |
| 140 | if (aStartOther >= aStart) { |
| 141 | aStart = aStartOther; |
| 142 | } |
| 143 | aLength = std::min(aEnd, aEndOther) - aStart; |
| 144 | } |
| 145 | } |
| 146 | |
| 147 | /** |
| 148 | * Intersects an interval as IntersectInterval does but by taking |
| 149 | * the offset and length of the other interval from a |
| 150 | * nsTextFrame::TrimmedOffsets object. |
| 151 | */ |
| 152 | static void TrimOffsets(uint32_t& aStart, uint32_t& aLength, |
| 153 | const nsTextFrame::TrimmedOffsets& aTrimmedOffsets) { |
| 154 | IntersectInterval(aStart, aLength, aTrimmedOffsets.mStart, |
| 155 | aTrimmedOffsets.mLength); |
| 156 | } |
| 157 | |
| 158 | /** |
| 159 | * Returns the closest ancestor-or-self node that is not an SVG <a> |
| 160 | * element. |
| 161 | */ |
| 162 | static nsIContent* GetFirstNonAAncestor(nsIContent* aContent) { |
| 163 | while (aContent && aContent->IsSVGElement(nsGkAtoms::a)) { |
| 164 | aContent = aContent->GetParent(); |
| 165 | } |
| 166 | return aContent; |
| 167 | } |
| 168 | |
| 169 | /** |
| 170 | * Returns whether the given node is a text content element[1], taking into |
| 171 | * account whether it has a valid parent. |
| 172 | * |
| 173 | * For example, in: |
| 174 | * |
| 175 | * <svg xmlns="http://www.w3.org/2000/svg"> |
| 176 | * <text><a/><text/></text> |
| 177 | * <tspan/> |
| 178 | * </svg> |
| 179 | * |
| 180 | * true would be returned for the outer <text> element and the <a> element, |
| 181 | * and false for the inner <text> element (since a <text> is not allowed |
| 182 | * to be a child of another <text>) and the <tspan> element (because it |
| 183 | * must be inside a <text> subtree). |
| 184 | * |
| 185 | * [1] https://svgwg.org/svg2-draft/intro.html#TermTextContentElement |
| 186 | */ |
| 187 | static bool IsTextContentElement(const nsIContent* aContent) { |
| 188 | if (aContent->IsSVGElement(nsGkAtoms::text)) { |
| 189 | const nsIContent* parent = GetFirstNonAAncestor(aContent->GetParent()); |
| 190 | return !parent || !IsTextContentElement(parent); |
| 191 | } |
| 192 | |
| 193 | if (aContent->IsSVGElement(nsGkAtoms::textPath)) { |
| 194 | const nsIContent* parent = GetFirstNonAAncestor(aContent->GetParent()); |
| 195 | return parent && parent->IsSVGElement(nsGkAtoms::text); |
| 196 | } |
| 197 | |
| 198 | return aContent->IsAnyOfSVGElements(nsGkAtoms::a, nsGkAtoms::tspan); |
| 199 | } |
| 200 | |
| 201 | /** |
| 202 | * Returns whether the specified frame is an nsTextFrame that has some text |
| 203 | * content. |
| 204 | */ |
| 205 | static bool IsNonEmptyTextFrame(const nsIFrame* aFrame) { |
| 206 | const nsTextFrame* textFrame = do_QueryFrame(aFrame); |
| 207 | if (!textFrame) { |
| 208 | return false; |
| 209 | } |
| 210 | |
| 211 | return textFrame->GetContentLength() != 0; |
| 212 | } |
| 213 | |
| 214 | /** |
| 215 | * Takes an nsIFrame and if it is a text frame that has some text content, |
| 216 | * returns it as an nsTextFrame and its corresponding Text. |
| 217 | * |
| 218 | * @param aFrame The frame to look at. |
| 219 | * @param aTextFrame aFrame as an nsTextFrame (output). |
| 220 | * @param aTextNode The Text content of aFrame (output). |
| 221 | * @return true if aFrame is a non-empty text frame, false otherwise. |
| 222 | */ |
| 223 | static bool GetNonEmptyTextFrameAndNode(nsIFrame* aFrame, |
| 224 | nsTextFrame*& aTextFrame, |
| 225 | Text*& aTextNode) { |
| 226 | nsTextFrame* text = do_QueryFrame(aFrame); |
| 227 | bool isNonEmptyTextFrame = text && text->GetContentLength() != 0; |
| 228 | |
| 229 | if (isNonEmptyTextFrame) { |
| 230 | nsIContent* content = text->GetContent(); |
| 231 | NS_ASSERTION(content && content->IsText(),do { if (!(content && content->IsText())) { NS_DebugBreak (NS_DEBUG_ASSERTION, "unexpected content type for nsTextFrame" , "content && content->IsText()", "./../../../layout/svg/SVGTextFrame.cpp" , 232); MOZ_PretendNoReturn(); } } while (0) |
| 232 | "unexpected content type for nsTextFrame")do { if (!(content && content->IsText())) { NS_DebugBreak (NS_DEBUG_ASSERTION, "unexpected content type for nsTextFrame" , "content && content->IsText()", "./../../../layout/svg/SVGTextFrame.cpp" , 232); MOZ_PretendNoReturn(); } } while (0); |
| 233 | |
| 234 | Text* node = content->AsText(); |
| 235 | 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" ")", "./../../../layout/svg/SVGTextFrame.cpp" , 237); AnnotateMozCrashReason("MOZ_ASSERT" "(" "node->TextLength() != 0" ") (" "frame's GetContentLength() should be 0 if the text node " "has no content" ")"); do { MOZ_CrashSequence(__null, 237); __attribute__ ((nomerge)) ::abort(); } while (false); } } while (false) |
| 236 | "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" ")", "./../../../layout/svg/SVGTextFrame.cpp" , 237); AnnotateMozCrashReason("MOZ_ASSERT" "(" "node->TextLength() != 0" ") (" "frame's GetContentLength() should be 0 if the text node " "has no content" ")"); do { MOZ_CrashSequence(__null, 237); __attribute__ ((nomerge)) ::abort(); } while (false); } } while (false) |
| 237 | "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" ")", "./../../../layout/svg/SVGTextFrame.cpp" , 237); AnnotateMozCrashReason("MOZ_ASSERT" "(" "node->TextLength() != 0" ") (" "frame's GetContentLength() should be 0 if the text node " "has no content" ")"); do { MOZ_CrashSequence(__null, 237); __attribute__ ((nomerge)) ::abort(); } while (false); } } while (false); |
| 238 | |
| 239 | aTextFrame = text; |
| 240 | aTextNode = node; |
| 241 | } |
| 242 | |
| 243 | 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" ")", "./../../../layout/svg/SVGTextFrame.cpp" , 244); AnnotateMozCrashReason("MOZ_ASSERT" "(" "IsNonEmptyTextFrame(aFrame) == isNonEmptyTextFrame" ") (" "our logic should agree with IsNonEmptyTextFrame" ")") ; do { MOZ_CrashSequence(__null, 244); __attribute__((nomerge )) ::abort(); } while (false); } } while (false) |
| 244 | "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" ")", "./../../../layout/svg/SVGTextFrame.cpp" , 244); AnnotateMozCrashReason("MOZ_ASSERT" "(" "IsNonEmptyTextFrame(aFrame) == isNonEmptyTextFrame" ") (" "our logic should agree with IsNonEmptyTextFrame" ")") ; do { MOZ_CrashSequence(__null, 244); __attribute__((nomerge )) ::abort(); } while (false); } } while (false); |
| 245 | return isNonEmptyTextFrame; |
| 246 | } |
| 247 | |
| 248 | /** |
| 249 | * Returns whether the specified atom is for one of the five |
| 250 | * glyph positioning attributes that can appear on SVG text |
| 251 | * elements -- x, y, dx, dy or rotate. |
| 252 | */ |
| 253 | static bool IsGlyphPositioningAttribute(const nsAtom* aAttribute) { |
| 254 | return aAttribute == nsGkAtoms::x || aAttribute == nsGkAtoms::y || |
| 255 | aAttribute == nsGkAtoms::dx || aAttribute == nsGkAtoms::dy || |
| 256 | aAttribute == nsGkAtoms::rotate; |
| 257 | } |
| 258 | |
| 259 | /** |
| 260 | * Returns the position in app units of a given baseline (using an |
| 261 | * SVG dominant-baseline property value) for a given nsTextFrame. |
| 262 | * |
| 263 | * @param aFrame The text frame to inspect. |
| 264 | * @param aTextRun The text run of aFrame. |
| 265 | * @param aDominantBaseline The dominant-baseline value to use. |
| 266 | */ |
| 267 | static nscoord GetBaselinePosition(nsTextFrame* aFrame, |
| 268 | const gfxTextRun* aTextRun, |
| 269 | StyleDominantBaseline aDominantBaseline, |
| 270 | float aFontSizeScaleFactor) { |
| 271 | WritingMode writingMode = aFrame->GetWritingMode(); |
| 272 | gfxFloat ascent, descent; |
| 273 | aTextRun->GetLineHeightMetrics(ascent, descent); |
| 274 | |
| 275 | auto convertIfVerticalRL = [&](gfxFloat dominantBaseline) { |
| 276 | return writingMode.IsVerticalRL() ? ascent + descent - dominantBaseline |
| 277 | : dominantBaseline; |
| 278 | }; |
| 279 | |
| 280 | switch (aDominantBaseline) { |
| 281 | case StyleDominantBaseline::Hanging: |
| 282 | return convertIfVerticalRL(ascent * 0.2); |
| 283 | case StyleDominantBaseline::TextTop: |
| 284 | return convertIfVerticalRL(0); |
| 285 | |
| 286 | case StyleDominantBaseline::Alphabetic: |
| 287 | return writingMode.IsVerticalRL() |
| 288 | ? ascent * 0.5 |
| 289 | : aFrame->GetLogicalBaseline(writingMode); |
| 290 | |
| 291 | case StyleDominantBaseline::Auto: |
| 292 | return convertIfVerticalRL(aFrame->GetLogicalBaseline(writingMode)); |
| 293 | |
| 294 | case StyleDominantBaseline::Middle: |
| 295 | return convertIfVerticalRL(aFrame->GetLogicalBaseline(writingMode) - |
| 296 | SVGContentUtils::GetFontXHeight(aFrame) / 2.0 * |
| 297 | AppUnitsPerCSSPixel() * |
| 298 | aFontSizeScaleFactor); |
| 299 | |
| 300 | case StyleDominantBaseline::TextBottom: |
| 301 | case StyleDominantBaseline::Ideographic: |
| 302 | return convertIfVerticalRL(ascent + descent); |
| 303 | |
| 304 | case StyleDominantBaseline::Central: |
| 305 | return (ascent + descent) / 2.0; |
| 306 | case StyleDominantBaseline::Mathematical: |
| 307 | return convertIfVerticalRL(ascent / 2.0); |
| 308 | } |
| 309 | |
| 310 | 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" ")", "./../../../layout/svg/SVGTextFrame.cpp" , 310); AnnotateMozCrashReason("MOZ_ASSERT" "(" "false" ") (" "MOZ_ASSERT_UNREACHABLE: " "unexpected dominant-baseline value" ")"); do { MOZ_CrashSequence(__null, 310); __attribute__((nomerge )) ::abort(); } while (false); } } while (false); |
| 311 | return convertIfVerticalRL(aFrame->GetLogicalBaseline(writingMode)); |
| 312 | } |
| 313 | |
| 314 | /** |
| 315 | * Truncates an array to be at most the length of another array. |
| 316 | * |
| 317 | * @param aArrayToTruncate The array to truncate. |
| 318 | * @param aReferenceArray The array whose length will be used to truncate |
| 319 | * aArrayToTruncate to. |
| 320 | */ |
| 321 | template <typename T, typename U> |
| 322 | static void TruncateTo(nsTArray<T>& aArrayToTruncate, |
| 323 | const nsTArray<U>& aReferenceArray) { |
| 324 | uint32_t length = aReferenceArray.Length(); |
| 325 | if (aArrayToTruncate.Length() > length) { |
| 326 | aArrayToTruncate.TruncateLength(length); |
| 327 | } |
| 328 | } |
| 329 | |
| 330 | /** |
| 331 | * Asserts that the anonymous block child of the SVGTextFrame has been |
| 332 | * reflowed (or does not exist). Returns null if the child has not been |
| 333 | * reflowed, and the frame otherwise. |
| 334 | * |
| 335 | * We check whether the kid has been reflowed and not the frame itself |
| 336 | * since we sometimes need to call this function during reflow, after the |
| 337 | * kid has been reflowed but before we have cleared the dirty bits on the |
| 338 | * frame itself. |
| 339 | */ |
| 340 | static SVGTextFrame* FrameIfAnonymousChildReflowed(SVGTextFrame* aFrame) { |
| 341 | 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" ")", "./../../../layout/svg/SVGTextFrame.cpp", 341); AnnotateMozCrashReason ("MOZ_ASSERT" "(" "aFrame" ") (" "aFrame must not be null" ")" ); do { MOZ_CrashSequence(__null, 341); __attribute__((nomerge )) ::abort(); } while (false); } } while (false); |
| 342 | nsIFrame* kid = aFrame->PrincipalChildList().FirstChild(); |
| 343 | if (kid->IsSubtreeDirty()) { |
| 344 | 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" ")", "./../../../layout/svg/SVGTextFrame.cpp", 344); AnnotateMozCrashReason ("MOZ_ASSERT" "(" "false" ") (" "should have already reflowed the anonymous block child" ")"); do { MOZ_CrashSequence(__null, 344); __attribute__((nomerge )) ::abort(); } while (false); } } while (false); |
| 345 | return nullptr; |
| 346 | } |
| 347 | return aFrame; |
| 348 | } |
| 349 | |
| 350 | // FIXME(emilio): SVG is a special-case where transforms affect layout. We don't |
| 351 | // want that to go outside the SVG stuff (and really we should aim to remove |
| 352 | // that). |
| 353 | static float GetContextScale(SVGTextFrame* aFrame) { |
| 354 | if (aFrame->HasAnyStateBits(NS_FRAME_IS_NONDISPLAY)) { |
| 355 | // When we are non-display, we could be painted in different coordinate |
| 356 | // spaces, and we don't want to have to reflow for each of these. We just |
| 357 | // assume that the context scale is 1.0 for them all, so we don't get stuck |
| 358 | // with a font size scale factor based on whichever referencing frame |
| 359 | // happens to reflow first. |
| 360 | return 1.0f; |
| 361 | } |
| 362 | auto matrix = nsLayoutUtils::GetTransformToAncestor( |
| 363 | RelativeTo{aFrame}, RelativeTo{SVGUtils::GetOuterSVGFrame(aFrame)}); |
| 364 | Matrix transform2D; |
| 365 | if (!matrix.CanDraw2D(&transform2D)) { |
| 366 | return 1.0f; |
| 367 | } |
| 368 | auto scales = transform2D.ScaleFactors(); |
| 369 | return std::max(0.0f, std::max(scales.xScale, scales.yScale)); |
| 370 | } |
| 371 | |
| 372 | // ============================================================================ |
| 373 | // Utility classes |
| 374 | |
| 375 | // ---------------------------------------------------------------------------- |
| 376 | // TextRenderedRun |
| 377 | |
| 378 | /** |
| 379 | * A run of text within a single nsTextFrame whose glyphs can all be painted |
| 380 | * with a single call to nsTextFrame::PaintText. A text rendered run can |
| 381 | * be created for a sequence of two or more consecutive glyphs as long as: |
| 382 | * |
| 383 | * - Only the first glyph has (or none of the glyphs have) been positioned |
| 384 | * with SVG text positioning attributes |
| 385 | * - All of the glyphs have zero rotation |
| 386 | * - The glyphs are not on a text path |
| 387 | * - The glyphs correspond to content within the one nsTextFrame |
| 388 | * |
| 389 | * A TextRenderedRunIterator produces TextRenderedRuns required for painting a |
| 390 | * whole SVGTextFrame. |
| 391 | */ |
| 392 | struct TextRenderedRun { |
| 393 | using Range = gfxTextRun::Range; |
| 394 | |
| 395 | /** |
| 396 | * Constructs a TextRenderedRun that is uninitialized except for mFrame |
| 397 | * being null. |
| 398 | */ |
| 399 | TextRenderedRun() : mFrame(nullptr) {} |
| 400 | |
| 401 | /** |
| 402 | * Constructs a TextRenderedRun with all of the information required to |
| 403 | * paint it. See the comments documenting the member variables below |
| 404 | * for descriptions of the arguments. |
| 405 | */ |
| 406 | TextRenderedRun(nsTextFrame* aFrame, SVGTextFrame* aSVGTextFrame, |
| 407 | const gfxPoint& aPosition, double aRotate, |
| 408 | float aFontSizeScaleFactor, nscoord aBaseline, |
| 409 | uint32_t aTextFrameContentOffset, |
| 410 | uint32_t aTextFrameContentLength, |
| 411 | uint32_t aTextElementCharIndex) |
| 412 | : mFrame(aFrame), |
| 413 | mRoot(aSVGTextFrame), |
| 414 | mPosition(aPosition), |
| 415 | mLengthAdjustScaleFactor(mRoot->mLengthAdjustScaleFactor), |
| 416 | mRotate(static_cast<float>(aRotate)), |
| 417 | mFontSizeScaleFactor(aFontSizeScaleFactor), |
| 418 | mBaseline(aBaseline), |
| 419 | mTextFrameContentOffset(aTextFrameContentOffset), |
| 420 | mTextFrameContentLength(aTextFrameContentLength), |
| 421 | mTextElementCharIndex(aTextElementCharIndex) {} |
| 422 | |
| 423 | /** |
| 424 | * Returns the text run for the text frame that this rendered run is part of. |
| 425 | */ |
| 426 | gfxTextRun* GetTextRun() const { |
| 427 | mFrame->EnsureTextRun(nsTextFrame::eInflated); |
| 428 | return mFrame->GetTextRun(nsTextFrame::eInflated); |
| 429 | } |
| 430 | |
| 431 | /** |
| 432 | * Return true if the logical inline direction is reversed compared to |
| 433 | * normal physical coordinates (i.e. if it is leftwards or upwards). |
| 434 | */ |
| 435 | bool IsInlineReversed() const { return GetTextRun()->IsInlineReversed(); } |
| 436 | |
| 437 | /** |
| 438 | * Returns whether this rendered run is vertical. |
| 439 | */ |
| 440 | bool IsVertical() const { return GetTextRun()->IsVertical(); } |
| 441 | |
| 442 | /** |
| 443 | * Returns the transform that converts from a <text> element's user space into |
| 444 | * the coordinate space that rendered runs can be painted directly in. |
| 445 | * |
| 446 | * The difference between this method and |
| 447 | * GetTransformFromRunUserSpaceToUserSpace is that when calling in to |
| 448 | * nsTextFrame::PaintText, it will already take into account any left clip |
| 449 | * edge (that is, it doesn't just apply a visual clip to the rendered text, it |
| 450 | * shifts the glyphs over so that they are painted with their left edge at the |
| 451 | * x coordinate passed in to it). Thus we need to account for this in our |
| 452 | * transform. |
| 453 | * |
| 454 | * |
| 455 | * Assume that we have: |
| 456 | * |
| 457 | * <text x="100" y="100" rotate="0 0 1 0 0 * 1">abcdef</text>. |
| 458 | * |
| 459 | * This would result in four text rendered runs: |
| 460 | * |
| 461 | * - one for "ab" |
| 462 | * - one for "c" |
| 463 | * - one for "de" |
| 464 | * - one for "f" |
| 465 | * |
| 466 | * Assume now that we are painting the third TextRenderedRun. It will have |
| 467 | * a left clip edge that is the sum of the advances of "abc", and it will |
| 468 | * have a right clip edge that is the advance of "f". In |
| 469 | * SVGTextFrame::PaintSVG(), we pass in nsPoint() (i.e., the origin) |
| 470 | * as the point at which to paint the text frame, and we pass in the |
| 471 | * clip edge values. The nsTextFrame will paint the substring of its |
| 472 | * text such that the top-left corner of the "d"'s glyph cell will be at |
| 473 | * (0, 0) in the current coordinate system. |
| 474 | * |
| 475 | * Thus, GetTransformFromUserSpaceForPainting must return a transform from |
| 476 | * whatever user space the <text> element is in to a coordinate space in |
| 477 | * device pixels (as that's what nsTextFrame works in) where the origin is at |
| 478 | * the same position as our user space mPositions[i].mPosition value for |
| 479 | * the "d" glyph, which will be (100 + userSpaceAdvance("abc"), 100). |
| 480 | * The translation required to do this (ignoring the scale to get from |
| 481 | * user space to device pixels, and ignoring the |
| 482 | * (100 + userSpaceAdvance("abc"), 100) translation) is: |
| 483 | * |
| 484 | * (-leftEdge, -baseline) |
| 485 | * |
| 486 | * where baseline is the distance between the baseline of the text and the top |
| 487 | * edge of the nsTextFrame. We translate by -leftEdge horizontally because |
| 488 | * the nsTextFrame will already shift the glyphs over by that amount and start |
| 489 | * painting glyphs at x = 0. We translate by -baseline vertically so that |
| 490 | * painting the top edges of the glyphs at y = 0 will result in their |
| 491 | * baselines being at our desired y position. |
| 492 | * |
| 493 | * |
| 494 | * Now for an example with RTL text. Assume our content is now |
| 495 | * <text x="100" y="100" rotate="0 0 1 0 0 1">WERBEH</text>. We'd have |
| 496 | * the following text rendered runs: |
| 497 | * |
| 498 | * - one for "EH" |
| 499 | * - one for "B" |
| 500 | * - one for "ER" |
| 501 | * - one for "W" |
| 502 | * |
| 503 | * Again, we are painting the third TextRenderedRun. The left clip edge |
| 504 | * is the advance of the "W" and the right clip edge is the sum of the |
| 505 | * advances of "BEH". Our translation to get the rendered "ER" glyphs |
| 506 | * in the right place this time is: |
| 507 | * |
| 508 | * (-frameWidth + rightEdge, -baseline) |
| 509 | * |
| 510 | * which is equivalent to: |
| 511 | * |
| 512 | * (-(leftEdge + advance("ER")), -baseline) |
| 513 | * |
| 514 | * The reason we have to shift left additionally by the width of the run |
| 515 | * of glyphs we are painting is that although the nsTextFrame is RTL, |
| 516 | * we still supply the top-left corner to paint the frame at when calling |
| 517 | * nsTextFrame::PaintText, even though our user space positions for each |
| 518 | * glyph in mPositions specifies the origin of each glyph, which for RTL |
| 519 | * glyphs is at the right edge of the glyph cell. |
| 520 | * |
| 521 | * |
| 522 | * For any other use of an nsTextFrame in the context of a particular run |
| 523 | * (such as hit testing, or getting its rectangle), |
| 524 | * GetTransformFromRunUserSpaceToUserSpace should be used. |
| 525 | * |
| 526 | * @param aContext The context to use for unit conversions. |
| 527 | */ |
| 528 | gfxMatrix GetTransformFromUserSpaceForPainting( |
| 529 | nsPresContext* aContext, const nscoord aVisIStartEdge, |
| 530 | const nscoord aVisIEndEdge) const; |
| 531 | |
| 532 | /** |
| 533 | * Returns the transform that converts from "run user space" to a <text> |
| 534 | * element's user space. Run user space is a coordinate system that has the |
| 535 | * same size as the <text>'s user space but rotated and translated such that |
| 536 | * (0,0) is the top-left of the rectangle that bounds the text. |
| 537 | * |
| 538 | * @param aContext The context to use for unit conversions. |
| 539 | */ |
| 540 | gfxMatrix GetTransformFromRunUserSpaceToUserSpace( |
| 541 | nsPresContext* aContext) const; |
| 542 | |
| 543 | /** |
| 544 | * Returns the transform that converts from "run user space" to float pixels |
| 545 | * relative to the nsTextFrame that this rendered run is a part of. |
| 546 | * |
| 547 | * @param aContext The context to use for unit conversions. |
| 548 | */ |
| 549 | gfxMatrix GetTransformFromRunUserSpaceToFrameUserSpace( |
| 550 | nsPresContext* aContext) const; |
| 551 | |
| 552 | /** |
| 553 | * Flag values used for the aFlags arguments of GetRunUserSpaceRect, |
| 554 | * GetFrameUserSpaceRect and GetUserSpaceRect. |
| 555 | */ |
| 556 | enum class GeometryFlag { |
| 557 | // Includes the fill geometry of the text in the returned rectangle. |
| 558 | IncludeFill, |
| 559 | // Includes the stroke geometry of the text in the returned rectangle. |
| 560 | IncludeStroke, |
| 561 | // Don't include any horizontal glyph overflow in the returned rectangle. |
| 562 | NoHorizontalOverflow |
| 563 | }; |
| 564 | using GeometryFlags = EnumSet<GeometryFlag>; |
| 565 | |
| 566 | /** |
| 567 | * Returns a rectangle that bounds the fill and/or stroke of the rendered run |
| 568 | * in run user space. |
| 569 | * |
| 570 | * @param aFlags Flags indicating what parts of the text to include in |
| 571 | * the rectangle. |
| 572 | */ |
| 573 | SVGBBox GetRunUserSpaceRect(GeometryFlags aFlags) const; |
| 574 | |
| 575 | /** |
| 576 | * Returns a rectangle that covers the fill and/or stroke of the rendered run |
| 577 | * in "frame user space". |
| 578 | * |
| 579 | * Frame user space is a coordinate space of the same scale as the <text> |
| 580 | * element's user space, but with its rotation set to the rotation of |
| 581 | * the glyphs within this rendered run and its origin set to the position |
| 582 | * such that placing the nsTextFrame there would result in the glyphs in |
| 583 | * this rendered run being at their correct positions. |
| 584 | * |
| 585 | * For example, say we have <text x="100 150" y="100">ab</text>. Assume |
| 586 | * the advance of both the "a" and the "b" is 12 user units, and the |
| 587 | * ascent of the text is 8 user units and its descent is 6 user units, |
| 588 | * and that we are not measuing the stroke of the text, so that we stay |
| 589 | * entirely within the glyph cells. |
| 590 | * |
| 591 | * There will be two text rendered runs, one for "a" and one for "b". |
| 592 | * |
| 593 | * The frame user space for the "a" run will have its origin at |
| 594 | * (100, 100 - 8) in the <text> element's user space and will have its |
| 595 | * axes aligned with the user space (since there is no rotate="" or |
| 596 | * text path involve) and with its scale the same as the user space. |
| 597 | * The rect returned by this method will be (0, 0, 12, 14), since the "a" |
| 598 | * glyph is right at the left of the nsTextFrame. |
| 599 | * |
| 600 | * The frame user space for the "b" run will have its origin at |
| 601 | * (150 - 12, 100 - 8), and scale/rotation the same as above. The rect |
| 602 | * returned by this method will be (12, 0, 12, 14), since we are |
| 603 | * advance("a") horizontally in to the text frame. |
| 604 | * |
| 605 | * @param aContext The context to use for unit conversions. |
| 606 | * @param aFlags Flags indicating what parts of the text to include in |
| 607 | * the rectangle. |
| 608 | */ |
| 609 | SVGBBox GetFrameUserSpaceRect(nsPresContext* aContext, |
| 610 | GeometryFlags aFlags) const; |
| 611 | |
| 612 | /** |
| 613 | * Returns a rectangle that covers the fill and/or stroke of the rendered run |
| 614 | * in the <text> element's user space. |
| 615 | * |
| 616 | * @param aContext The context to use for unit conversions. |
| 617 | * @param aFlags A combination of flags indicating what parts of |
| 618 | * the text to include in the rectangle. |
| 619 | * @param aAdditionalTransform An additional transform to apply to the |
| 620 | * frame user space rectangle before its bounds are transformed into |
| 621 | * user space. |
| 622 | */ |
| 623 | SVGBBox GetUserSpaceRect( |
| 624 | nsPresContext* aContext, GeometryFlags aFlags, |
| 625 | const gfxMatrix* aAdditionalTransform = nullptr) const; |
| 626 | |
| 627 | /** |
| 628 | * Gets the app unit amounts to clip from the left and right edges of |
| 629 | * the nsTextFrame in order to paint just this rendered run. |
| 630 | * |
| 631 | * Note that if clip edge amounts land in the middle of a glyph, the |
| 632 | * glyph won't be painted at all. The clip edges are thus more of |
| 633 | * a selection mechanism for which glyphs will be painted, rather |
| 634 | * than a geometric clip. |
| 635 | */ |
| 636 | void GetClipEdges(nscoord& aVisIStartEdge, nscoord& aVisIEndEdge) const; |
| 637 | |
| 638 | /** |
| 639 | * Returns the advance width of the whole rendered run. |
| 640 | */ |
| 641 | nscoord GetAdvanceWidth() const; |
| 642 | |
| 643 | /** |
| 644 | * Returns the index of the character into this rendered run whose |
| 645 | * glyph cell contains the given point, or -1 if there is no such |
| 646 | * character. This does not hit test against any overflow. |
| 647 | * |
| 648 | * @param aContext The context to use for unit conversions. |
| 649 | * @param aPoint The point in the user space of the <text> element. |
| 650 | */ |
| 651 | int32_t GetCharNumAtPosition(nsPresContext* aContext, |
| 652 | const gfxPoint& aPoint) const; |
| 653 | |
| 654 | /** |
| 655 | * The text frame that this rendered run lies within. |
| 656 | */ |
| 657 | nsTextFrame* mFrame; |
| 658 | |
| 659 | /** |
| 660 | * The SVGTextFrame to which our text frame belongs. |
| 661 | */ |
| 662 | SVGTextFrame* mRoot; |
| 663 | |
| 664 | /** |
| 665 | * The point in user space that the text is positioned at. |
| 666 | * |
| 667 | * For a horizontal run: |
| 668 | * The x coordinate is the left edge of a LTR run of text or the right edge of |
| 669 | * an RTL run. The y coordinate is the baseline of the text. |
| 670 | * For a vertical run: |
| 671 | * The x coordinate is the baseline of the text. |
| 672 | * The y coordinate is the top edge of a LTR run, or bottom of RTL. |
| 673 | */ |
| 674 | gfxPoint mPosition; |
| 675 | |
| 676 | /** |
| 677 | * The horizontal scale factor to apply when painting glyphs to take |
| 678 | * into account textLength="". |
| 679 | */ |
| 680 | float mLengthAdjustScaleFactor; |
| 681 | |
| 682 | /** |
| 683 | * The rotation in radians in the user coordinate system that the text has. |
| 684 | */ |
| 685 | float mRotate; |
| 686 | |
| 687 | /** |
| 688 | * The scale factor that was used to transform the text run's original font |
| 689 | * size into a sane range for painting and measurement. |
| 690 | */ |
| 691 | double mFontSizeScaleFactor; |
| 692 | |
| 693 | /** |
| 694 | * The baseline in app units of this text run. The measurement is from the |
| 695 | * top of the text frame. (From the left edge if vertical.) |
| 696 | */ |
| 697 | nscoord mBaseline; |
| 698 | |
| 699 | /** |
| 700 | * The offset and length in mFrame's content Text that corresponds to |
| 701 | * this text rendered run. These are original char indexes. |
| 702 | */ |
| 703 | uint32_t mTextFrameContentOffset; |
| 704 | uint32_t mTextFrameContentLength; |
| 705 | |
| 706 | /** |
| 707 | * The character index in the whole SVG <text> element that this text rendered |
| 708 | * run begins at. |
| 709 | */ |
| 710 | uint32_t mTextElementCharIndex; |
| 711 | }; |
| 712 | |
| 713 | gfxMatrix TextRenderedRun::GetTransformFromUserSpaceForPainting( |
| 714 | nsPresContext* aContext, const nscoord aVisIStartEdge, |
| 715 | const nscoord aVisIEndEdge) const { |
| 716 | // We transform to device pixels positioned such that painting the text frame |
| 717 | // at (0,0) with aItem will result in the text being in the right place. |
| 718 | |
| 719 | gfxMatrix m; |
| 720 | if (!mFrame) { |
| 721 | return m; |
| 722 | } |
| 723 | |
| 724 | float cssPxPerDevPx = |
| 725 | nsPresContext::AppUnitsToFloatCSSPixels(aContext->AppUnitsPerDevPixel()); |
| 726 | |
| 727 | // Glyph position in user space. |
| 728 | m.PreTranslate(mPosition / cssPxPerDevPx); |
| 729 | |
| 730 | // Take into account any font size scaling and scaling due to textLength="". |
| 731 | m.PreScale(1.0 / mFontSizeScaleFactor, 1.0 / mFontSizeScaleFactor); |
| 732 | |
| 733 | // Rotation due to rotate="" or a <textPath>. |
| 734 | m.PreRotate(mRotate); |
| 735 | |
| 736 | // Scale for textLength="" and translate to get the text frame |
| 737 | // to the right place. |
| 738 | nsPoint t; |
| 739 | if (IsVertical()) { |
| 740 | m.PreScale(1.0, mLengthAdjustScaleFactor); |
| 741 | t = nsPoint(-mBaseline, IsInlineReversed() |
| 742 | ? -mFrame->GetRect().height + aVisIEndEdge |
| 743 | : -aVisIStartEdge); |
| 744 | } else { |
| 745 | m.PreScale(mLengthAdjustScaleFactor, 1.0); |
| 746 | t = nsPoint(IsInlineReversed() ? -mFrame->GetRect().width + aVisIEndEdge |
| 747 | : -aVisIStartEdge, |
| 748 | -mBaseline); |
| 749 | } |
| 750 | m.PreTranslate(AppUnitsToGfxUnits(t, aContext)); |
| 751 | |
| 752 | return m; |
| 753 | } |
| 754 | |
| 755 | gfxMatrix TextRenderedRun::GetTransformFromRunUserSpaceToUserSpace( |
| 756 | nsPresContext* aContext) const { |
| 757 | gfxMatrix m; |
| 758 | if (!mFrame) { |
| 759 | return m; |
| 760 | } |
| 761 | |
| 762 | float cssPxPerDevPx = |
| 763 | nsPresContext::AppUnitsToFloatCSSPixels(aContext->AppUnitsPerDevPixel()); |
| 764 | |
| 765 | nscoord start, end; |
| 766 | GetClipEdges(start, end); |
| 767 | |
| 768 | // Glyph position in user space. |
| 769 | m.PreTranslate(mPosition); |
| 770 | |
| 771 | // Rotation due to rotate="" or a <textPath>. |
| 772 | m.PreRotate(mRotate); |
| 773 | |
| 774 | // Scale for textLength="" and translate to get the text frame |
| 775 | // to the right place. |
| 776 | |
| 777 | nsPoint t; |
| 778 | if (IsVertical()) { |
| 779 | m.PreScale(1.0, mLengthAdjustScaleFactor); |
| 780 | t = nsPoint(-mBaseline, IsInlineReversed() |
| 781 | ? -mFrame->GetRect().height + start + end |
| 782 | : 0); |
| 783 | } else { |
| 784 | m.PreScale(mLengthAdjustScaleFactor, 1.0); |
| 785 | t = nsPoint(IsInlineReversed() ? -mFrame->GetRect().width + start + end : 0, |
| 786 | -mBaseline); |
| 787 | } |
| 788 | m.PreTranslate(AppUnitsToGfxUnits(t, aContext) * cssPxPerDevPx / |
| 789 | mFontSizeScaleFactor); |
| 790 | |
| 791 | return m; |
| 792 | } |
| 793 | |
| 794 | gfxMatrix TextRenderedRun::GetTransformFromRunUserSpaceToFrameUserSpace( |
| 795 | nsPresContext* aContext) const { |
| 796 | gfxMatrix m; |
| 797 | if (!mFrame) { |
| 798 | return m; |
| 799 | } |
| 800 | |
| 801 | nscoord start, end; |
| 802 | GetClipEdges(start, end); |
| 803 | |
| 804 | // Translate by the horizontal distance into the text frame this |
| 805 | // rendered run is. |
| 806 | gfxFloat appPerCssPx = AppUnitsPerCSSPixel(); |
| 807 | gfxPoint t = IsVertical() ? gfxPoint(0, start / appPerCssPx) |
| 808 | : gfxPoint(start / appPerCssPx, 0); |
| 809 | return m.PreTranslate(t); |
| 810 | } |
| 811 | |
| 812 | SVGBBox TextRenderedRun::GetRunUserSpaceRect(GeometryFlags aFlags) const { |
| 813 | SVGBBox r; |
| 814 | if (!mFrame) { |
| 815 | return r; |
| 816 | } |
| 817 | |
| 818 | // Determine the amount of overflow around frame's mRect. |
| 819 | // |
| 820 | // We need to call InkOverflowRectRelativeToSelf because this includes |
| 821 | // overflowing decorations, which the MeasureText call below does not. |
| 822 | nsRect self = mFrame->InkOverflowRectRelativeToSelf(); |
| 823 | nsRect rect = mFrame->GetRect(); |
| 824 | bool vertical = IsVertical(); |
| 825 | nsMargin inkOverflow( |
| 826 | vertical ? -self.x : -self.y, |
| 827 | vertical ? self.YMost() - rect.height : self.XMost() - rect.width, |
| 828 | vertical ? self.XMost() - rect.width : self.YMost() - rect.height, |
| 829 | vertical ? -self.y : -self.x); |
| 830 | |
| 831 | gfxSkipCharsIterator it = mFrame->EnsureTextRun(nsTextFrame::eInflated); |
| 832 | gfxTextRun* textRun = mFrame->GetTextRun(nsTextFrame::eInflated); |
| 833 | |
| 834 | // Get the content range for this rendered run. |
| 835 | Range range = ConvertOriginalToSkipped(it, mTextFrameContentOffset, |
| 836 | mTextFrameContentLength); |
| 837 | if (range.Length() == 0) { |
| 838 | return r; |
| 839 | } |
| 840 | |
| 841 | auto& provider = mRoot->PropertyProviderFor(mFrame); |
| 842 | |
| 843 | // Measure that range. |
| 844 | gfxTextRun::Metrics metrics = textRun->MeasureText( |
| 845 | range, gfxFont::LOOSE_INK_EXTENTS, nullptr, &provider); |
| 846 | // Make sure it includes the font-box. |
| 847 | gfxRect fontBox(0, -metrics.mAscent, metrics.mAdvanceWidth, |
| 848 | metrics.mAscent + metrics.mDescent); |
| 849 | metrics.mBoundingBox.UnionRect(metrics.mBoundingBox, fontBox); |
| 850 | |
| 851 | // Determine the rectangle that covers the rendered run's fill, |
| 852 | // taking into account the measured overflow due to decorations. |
| 853 | nscoord baseline = |
| 854 | NSToCoordRoundWithClamp(metrics.mBoundingBox.y + metrics.mAscent); |
| 855 | gfxFloat x, width; |
| 856 | if (aFlags.contains(GeometryFlag::NoHorizontalOverflow)) { |
| 857 | x = 0.0; |
| 858 | width = textRun->GetAdvanceWidth(range, &provider); |
| 859 | if (width < 0.0) { |
| 860 | x = width; |
| 861 | width = -width; |
| 862 | } |
| 863 | } else { |
| 864 | x = metrics.mBoundingBox.x; |
| 865 | width = metrics.mBoundingBox.width; |
| 866 | } |
| 867 | nsRect fillInAppUnits(NSToCoordRoundWithClamp(x), baseline, |
| 868 | NSToCoordRoundWithClamp(width), |
| 869 | NSToCoordRoundWithClamp(metrics.mBoundingBox.height)); |
| 870 | fillInAppUnits.Inflate(inkOverflow); |
| 871 | if (textRun->IsVertical()) { |
| 872 | // Swap line-relative textMetrics dimensions to physical coordinates. |
| 873 | std::swap(fillInAppUnits.x, fillInAppUnits.y); |
| 874 | std::swap(fillInAppUnits.width, fillInAppUnits.height); |
| 875 | } |
| 876 | |
| 877 | // Convert the app units rectangle to user units. |
| 878 | gfxRect fill = AppUnitsToFloatCSSPixels(fillInAppUnits); |
| 879 | |
| 880 | // Scale the rectangle up due to any mFontSizeScaleFactor. |
| 881 | fill.Scale(1.0 / mFontSizeScaleFactor); |
| 882 | |
| 883 | // Include the fill if requested. |
| 884 | if (aFlags.contains(GeometryFlag::IncludeFill)) { |
| 885 | r = fill; |
| 886 | } |
| 887 | |
| 888 | // Include the stroke if requested. |
| 889 | if (aFlags.contains(GeometryFlag::IncludeStroke) && !fill.IsEmpty() && |
| 890 | SVGUtils::GetStrokeWidth(mFrame) > 0) { |
| 891 | r.UnionEdges( |
| 892 | SVGUtils::PathExtentsToMaxStrokeExtents(fill, mFrame, gfxMatrix())); |
| 893 | } |
| 894 | |
| 895 | return r; |
| 896 | } |
| 897 | |
| 898 | SVGBBox TextRenderedRun::GetFrameUserSpaceRect(nsPresContext* aContext, |
| 899 | GeometryFlags aFlags) const { |
| 900 | SVGBBox r = GetRunUserSpaceRect(aFlags); |
| 901 | if (r.IsEmpty()) { |
| 902 | return r; |
| 903 | } |
| 904 | gfxMatrix m = GetTransformFromRunUserSpaceToFrameUserSpace(aContext); |
| 905 | return m.TransformBounds(r.ToThebesRect()); |
| 906 | } |
| 907 | |
| 908 | SVGBBox TextRenderedRun::GetUserSpaceRect( |
| 909 | nsPresContext* aContext, GeometryFlags aFlags, |
| 910 | const gfxMatrix* aAdditionalTransform) const { |
| 911 | SVGBBox r = GetRunUserSpaceRect(aFlags); |
| 912 | if (r.IsEmpty()) { |
| 913 | return r; |
| 914 | } |
| 915 | gfxMatrix m = GetTransformFromRunUserSpaceToUserSpace(aContext); |
| 916 | if (aAdditionalTransform) { |
| 917 | m *= *aAdditionalTransform; |
| 918 | } |
| 919 | return m.TransformBounds(r.ToThebesRect()); |
| 920 | } |
| 921 | |
| 922 | void TextRenderedRun::GetClipEdges(nscoord& aVisIStartEdge, |
| 923 | nscoord& aVisIEndEdge) const { |
| 924 | uint32_t contentLength = mFrame->GetContentLength(); |
| 925 | if (mTextFrameContentOffset == 0 && |
| 926 | mTextFrameContentLength == contentLength) { |
| 927 | // If the rendered run covers the entire content, we know we don't need |
| 928 | // to clip without having to measure anything. |
| 929 | aVisIStartEdge = 0; |
| 930 | aVisIEndEdge = 0; |
| 931 | return; |
| 932 | } |
| 933 | |
| 934 | gfxSkipCharsIterator it = mFrame->EnsureTextRun(nsTextFrame::eInflated); |
| 935 | gfxTextRun* textRun = mFrame->GetTextRun(nsTextFrame::eInflated); |
| 936 | auto& provider = mRoot->PropertyProviderFor(mFrame); |
| 937 | |
| 938 | // Get the covered content offset/length for this rendered run in skipped |
| 939 | // characters, since that is what GetAdvanceWidth expects. |
| 940 | Range runRange = ConvertOriginalToSkipped(it, mTextFrameContentOffset, |
| 941 | mTextFrameContentLength); |
| 942 | |
| 943 | // Get the offset/length of the whole nsTextFrame. |
| 944 | uint32_t frameOffset = mFrame->GetContentOffset(); |
| 945 | uint32_t frameLength = mFrame->GetContentLength(); |
| 946 | |
| 947 | // Trim the whole-nsTextFrame offset/length to remove any leading/trailing |
| 948 | // white space, as the nsTextFrame when painting does not include them when |
| 949 | // interpreting clip edges. |
| 950 | nsTextFrame::TrimmedOffsets trimmedOffsets = |
| 951 | mFrame->GetTrimmedOffsets(mFrame->CharacterDataBuffer()); |
| 952 | TrimOffsets(frameOffset, frameLength, trimmedOffsets); |
| 953 | |
| 954 | // Convert the trimmed whole-nsTextFrame offset/length into skipped |
| 955 | // characters. |
| 956 | Range frameRange = ConvertOriginalToSkipped(it, frameOffset, frameLength); |
| 957 | |
| 958 | // Get the advance of aRange, using the aCachedRange if available to |
| 959 | // accelerate textrun measurement. |
| 960 | auto MeasureUsingCache = [&](SVGTextFrame::CachedMeasuredRange& aCachedRange, |
| 961 | const Range& aRange) -> nscoord { |
| 962 | if (aRange.Intersects(aCachedRange.mRange)) { |
| 963 | // Figure out the deltas between the cached range and the new one at the |
| 964 | // start and end edges. |
| 965 | Range startDelta, endDelta; |
| 966 | int startSign = 0, endSign = 0; |
| 967 | if (aRange.start < aCachedRange.mRange.start) { |
| 968 | // This range extends the cached range at the start. |
| 969 | startSign = 1; |
| 970 | startDelta = Range(aRange.start, aCachedRange.mRange.start); |
| 971 | } else if (aRange.start > aCachedRange.mRange.start) { |
| 972 | // This range trims the cached range at the start. |
| 973 | startSign = -1; |
| 974 | startDelta = Range(aCachedRange.mRange.start, aRange.start); |
| 975 | } |
| 976 | if (aRange.end > aCachedRange.mRange.end) { |
| 977 | // This range extends the cached range at the end. |
| 978 | endSign = 1; |
| 979 | endDelta = Range(aCachedRange.mRange.end, aRange.end); |
| 980 | } else if (aRange.end < aCachedRange.mRange.end) { |
| 981 | // This range trims the cached range at the end. |
| 982 | endSign = -1; |
| 983 | endDelta = Range(aRange.end, aCachedRange.mRange.end); |
| 984 | } |
| 985 | // If the total of the deltas is less than the length of aRange, |
| 986 | // it will be cheaper to measure them and adjust the cached advance |
| 987 | // instead of measuring the whole of aRange. |
| 988 | if (startDelta.Length() + endDelta.Length() < aRange.Length()) { |
| 989 | if (startSign) { |
| 990 | aCachedRange.mAdvance += |
| 991 | startSign * textRun->GetAdvanceWidth(startDelta, &provider); |
| 992 | } |
| 993 | if (endSign) { |
| 994 | aCachedRange.mAdvance += |
| 995 | endSign * textRun->GetAdvanceWidth(endDelta, &provider); |
| 996 | } |
| 997 | } else { |
| 998 | aCachedRange.mAdvance = textRun->GetAdvanceWidth(aRange, &provider); |
| 999 | } |
| 1000 | } else { |
| 1001 | // Just measure the range, and cache the result. |
| 1002 | aCachedRange.mAdvance = textRun->GetAdvanceWidth(aRange, &provider); |
| 1003 | } |
| 1004 | aCachedRange.mRange = aRange; |
| 1005 | return aCachedRange.mAdvance; |
| 1006 | }; |
| 1007 | |
| 1008 | mRoot->SetCurrentFrameForCaching(mFrame); |
| 1009 | nscoord startEdge = |
| 1010 | MeasureUsingCache(mRoot->CachedRange(SVGTextFrame::WhichRange::Before), |
| 1011 | Range(frameRange.start, runRange.start)); |
| 1012 | nscoord endEdge = |
| 1013 | MeasureUsingCache(mRoot->CachedRange(SVGTextFrame::WhichRange::After), |
| 1014 | Range(runRange.end, frameRange.end)); |
| 1015 | |
| 1016 | if (textRun->IsInlineReversed()) { |
| 1017 | aVisIStartEdge = endEdge; |
| 1018 | aVisIEndEdge = startEdge; |
| 1019 | } else { |
| 1020 | aVisIStartEdge = startEdge; |
| 1021 | aVisIEndEdge = endEdge; |
| 1022 | } |
| 1023 | } |
| 1024 | |
| 1025 | nscoord TextRenderedRun::GetAdvanceWidth() const { |
| 1026 | gfxSkipCharsIterator it = mFrame->EnsureTextRun(nsTextFrame::eInflated); |
| 1027 | gfxTextRun* textRun = mFrame->GetTextRun(nsTextFrame::eInflated); |
| 1028 | auto& provider = mRoot->PropertyProviderFor(mFrame); |
| 1029 | |
| 1030 | Range range = ConvertOriginalToSkipped(it, mTextFrameContentOffset, |
| 1031 | mTextFrameContentLength); |
| 1032 | |
| 1033 | return textRun->GetAdvanceWidth(range, &provider); |
| 1034 | } |
| 1035 | |
| 1036 | int32_t TextRenderedRun::GetCharNumAtPosition(nsPresContext* aContext, |
| 1037 | const gfxPoint& aPoint) const { |
| 1038 | if (mTextFrameContentLength == 0) { |
| 1039 | return -1; |
| 1040 | } |
| 1041 | |
| 1042 | float cssPxPerDevPx = |
| 1043 | nsPresContext::AppUnitsToFloatCSSPixels(aContext->AppUnitsPerDevPixel()); |
| 1044 | |
| 1045 | // Convert the point from user space into run user space, and take |
| 1046 | // into account any mFontSizeScaleFactor. |
| 1047 | gfxMatrix m = GetTransformFromRunUserSpaceToUserSpace(aContext); |
| 1048 | if (!m.Invert()) { |
| 1049 | return -1; |
| 1050 | } |
| 1051 | gfxPoint p = m.TransformPoint(aPoint) / cssPxPerDevPx * mFontSizeScaleFactor; |
| 1052 | |
| 1053 | // First check that the point lies vertically between the top and bottom |
| 1054 | // edges of the text. |
| 1055 | gfxFloat ascent, descent; |
| 1056 | GetAscentAndDescentInAppUnits(mFrame, ascent, descent); |
| 1057 | |
| 1058 | WritingMode writingMode = mFrame->GetWritingMode(); |
| 1059 | if (writingMode.IsVertical()) { |
| 1060 | gfxFloat leftEdge = mFrame->GetLogicalBaseline(writingMode) - |
| 1061 | (writingMode.IsVerticalRL() ? ascent : descent); |
| 1062 | gfxFloat rightEdge = leftEdge + ascent + descent; |
| 1063 | if (p.x < aContext->AppUnitsToGfxUnits(leftEdge) || |
| 1064 | p.x > aContext->AppUnitsToGfxUnits(rightEdge)) { |
| 1065 | return -1; |
| 1066 | } |
| 1067 | } else { |
| 1068 | gfxFloat topEdge = mFrame->GetLogicalBaseline(writingMode) - ascent; |
| 1069 | gfxFloat bottomEdge = topEdge + ascent + descent; |
| 1070 | if (p.y < aContext->AppUnitsToGfxUnits(topEdge) || |
| 1071 | p.y > aContext->AppUnitsToGfxUnits(bottomEdge)) { |
| 1072 | return -1; |
| 1073 | } |
| 1074 | } |
| 1075 | |
| 1076 | gfxSkipCharsIterator it = mFrame->EnsureTextRun(nsTextFrame::eInflated); |
| 1077 | gfxTextRun* textRun = mFrame->GetTextRun(nsTextFrame::eInflated); |
| 1078 | auto& provider = mRoot->PropertyProviderFor(mFrame); |
| 1079 | |
| 1080 | // Next check that the point lies horizontally within the left and right |
| 1081 | // edges of the text. |
| 1082 | Range range = ConvertOriginalToSkipped(it, mTextFrameContentOffset, |
| 1083 | mTextFrameContentLength); |
| 1084 | gfxFloat runAdvance = |
| 1085 | aContext->AppUnitsToGfxUnits(textRun->GetAdvanceWidth(range, &provider)); |
| 1086 | |
| 1087 | gfxFloat pos = writingMode.IsVertical() ? p.y : p.x; |
| 1088 | if (pos < 0 || pos >= runAdvance) { |
| 1089 | return -1; |
| 1090 | } |
| 1091 | |
| 1092 | // Finally, measure progressively smaller portions of the rendered run to |
| 1093 | // find which glyph it lies within. This will need to change once we |
| 1094 | // support letter-spacing and word-spacing. |
| 1095 | bool ir = textRun->IsInlineReversed(); |
| 1096 | for (int32_t i = mTextFrameContentLength - 1; i >= 0; i--) { |
| 1097 | range = ConvertOriginalToSkipped(it, mTextFrameContentOffset, i); |
| 1098 | gfxFloat advance = aContext->AppUnitsToGfxUnits( |
| 1099 | textRun->GetAdvanceWidth(range, &provider)); |
| 1100 | if ((ir && pos < runAdvance - advance) || (!ir && pos >= advance)) { |
| 1101 | return i; |
| 1102 | } |
| 1103 | } |
| 1104 | return -1; |
| 1105 | } |
| 1106 | |
| 1107 | // ---------------------------------------------------------------------------- |
| 1108 | // TextNodeIterator |
| 1109 | |
| 1110 | enum class SubtreePosition { Before, Within, After }; |
| 1111 | |
| 1112 | /** |
| 1113 | * An iterator class for Text that are descendants of a given node, the |
| 1114 | * root. Nodes are iterated in document order. An optional subtree can be |
| 1115 | * specified, in which case the iterator will track whether the current state of |
| 1116 | * the traversal over the tree is within that subtree or is past that subtree. |
| 1117 | */ |
| 1118 | class TextNodeIterator { |
| 1119 | public: |
| 1120 | /** |
| 1121 | * Constructs a TextNodeIterator with the specified root node and optional |
| 1122 | * subtree. |
| 1123 | */ |
| 1124 | explicit TextNodeIterator(nsIContent* aRoot, nsIContent* aSubtree = nullptr) |
| 1125 | : mRoot(aRoot), |
| 1126 | mSubtree(aSubtree == aRoot ? nullptr : aSubtree), |
| 1127 | mCurrent(aRoot), |
| 1128 | mSubtreePosition(mSubtree ? SubtreePosition::Before |
| 1129 | : SubtreePosition::Within) { |
| 1130 | NS_ASSERTION(aRoot, "expected non-null root")do { if (!(aRoot)) { NS_DebugBreak(NS_DEBUG_ASSERTION, "expected non-null root" , "aRoot", "./../../../layout/svg/SVGTextFrame.cpp", 1130); MOZ_PretendNoReturn (); } } while (0); |
| 1131 | if (!aRoot->IsText()) { |
| 1132 | GetNext(); |
| 1133 | } |
| 1134 | } |
| 1135 | |
| 1136 | /** |
| 1137 | * Returns the current Text, or null if the iterator has finished. |
| 1138 | */ |
| 1139 | Text* GetCurrent() const { return mCurrent ? mCurrent->AsText() : nullptr; } |
| 1140 | |
| 1141 | /** |
| 1142 | * Advances to the next Text and returns it, or null if the end of |
| 1143 | * iteration has been reached. |
| 1144 | */ |
| 1145 | Text* GetNext(); |
| 1146 | |
| 1147 | /** |
| 1148 | * Returns whether the iterator is currently within the subtree rooted |
| 1149 | * at mSubtree. Returns true if we are not tracking a subtree (we consider |
| 1150 | * that we're always within the subtree). |
| 1151 | */ |
| 1152 | bool IsWithinSubtree() const { |
| 1153 | return mSubtreePosition == SubtreePosition::Within; |
| 1154 | } |
| 1155 | |
| 1156 | /** |
| 1157 | * Returns whether the iterator is past the subtree rooted at mSubtree. |
| 1158 | * Returns false if we are not tracking a subtree. |
| 1159 | */ |
| 1160 | bool IsAfterSubtree() const { |
| 1161 | return mSubtreePosition == SubtreePosition::After; |
| 1162 | } |
| 1163 | |
| 1164 | private: |
| 1165 | /** |
| 1166 | * The root under which all Text will be iterated over. |
| 1167 | */ |
| 1168 | nsIContent* const mRoot; |
| 1169 | |
| 1170 | /** |
| 1171 | * The node rooting the subtree to track. |
| 1172 | */ |
| 1173 | nsIContent* const mSubtree; |
| 1174 | |
| 1175 | /** |
| 1176 | * The current node during iteration. |
| 1177 | */ |
| 1178 | nsIContent* mCurrent; |
| 1179 | |
| 1180 | /** |
| 1181 | * The current iterator position relative to mSubtree. |
| 1182 | */ |
| 1183 | SubtreePosition mSubtreePosition; |
| 1184 | }; |
| 1185 | |
| 1186 | Text* TextNodeIterator::GetNext() { |
| 1187 | // Starting from mCurrent, we do a non-recursive traversal to the next |
| 1188 | // Text beneath mRoot, updating mSubtreePosition appropriately if we |
| 1189 | // encounter mSubtree. |
| 1190 | if (mCurrent) { |
| 1191 | do { |
| 1192 | nsIContent* next = |
| 1193 | IsTextContentElement(mCurrent) ? mCurrent->GetFirstChild() : nullptr; |
| 1194 | if (next) { |
| 1195 | mCurrent = next; |
| 1196 | if (mCurrent == mSubtree) { |
| 1197 | mSubtreePosition = SubtreePosition::Within; |
| 1198 | } |
| 1199 | } else { |
| 1200 | for (;;) { |
| 1201 | if (mCurrent == mRoot) { |
| 1202 | mCurrent = nullptr; |
| 1203 | break; |
| 1204 | } |
| 1205 | if (mCurrent == mSubtree) { |
| 1206 | mSubtreePosition = SubtreePosition::After; |
| 1207 | } |
| 1208 | next = mCurrent->GetNextSibling(); |
| 1209 | if (next) { |
| 1210 | mCurrent = next; |
| 1211 | if (mCurrent == mSubtree) { |
| 1212 | mSubtreePosition = SubtreePosition::Within; |
| 1213 | } |
| 1214 | break; |
| 1215 | } |
| 1216 | if (mCurrent == mSubtree) { |
| 1217 | mSubtreePosition = SubtreePosition::After; |
| 1218 | } |
| 1219 | mCurrent = mCurrent->GetParent(); |
| 1220 | } |
| 1221 | } |
| 1222 | } while (mCurrent && !mCurrent->IsText()); |
| 1223 | } |
| 1224 | |
| 1225 | return mCurrent ? mCurrent->AsText() : nullptr; |
| 1226 | } |
| 1227 | |
| 1228 | // ---------------------------------------------------------------------------- |
| 1229 | // TextNodeCorrespondenceRecorder |
| 1230 | |
| 1231 | /** |
| 1232 | * TextNodeCorrespondence is used as the value of a frame property that |
| 1233 | * is stored on all its descendant nsTextFrames. It stores the number of DOM |
| 1234 | * characters between it and the previous nsTextFrame that did not have an |
| 1235 | * nsTextFrame created for them, due to either not being in a correctly |
| 1236 | * parented text content element, or because they were display:none. |
| 1237 | * These are called "undisplayed characters". |
| 1238 | * |
| 1239 | * See also TextNodeCorrespondenceRecorder below, which is what sets the |
| 1240 | * frame property. |
| 1241 | */ |
| 1242 | struct TextNodeCorrespondence { |
| 1243 | explicit TextNodeCorrespondence(uint32_t aUndisplayedCharacters) |
| 1244 | : mUndisplayedCharacters(aUndisplayedCharacters) {} |
| 1245 | |
| 1246 | uint32_t mUndisplayedCharacters; |
| 1247 | }; |
| 1248 | |
| 1249 | NS_DECLARE_FRAME_PROPERTY_DELETABLE(TextNodeCorrespondenceProperty,static const mozilla::FramePropertyDescriptor<TextNodeCorrespondence >* TextNodeCorrespondenceProperty() { static const auto descriptor = mozilla::FramePropertyDescriptor<TextNodeCorrespondence >::NewWithDestructor<DeleteValue>(); return &descriptor ; } |
| 1250 | TextNodeCorrespondence)static const mozilla::FramePropertyDescriptor<TextNodeCorrespondence >* TextNodeCorrespondenceProperty() { static const auto descriptor = mozilla::FramePropertyDescriptor<TextNodeCorrespondence >::NewWithDestructor<DeleteValue>(); return &descriptor ; } |
| 1251 | |
| 1252 | /** |
| 1253 | * Returns the number of undisplayed characters before the specified |
| 1254 | * nsTextFrame. |
| 1255 | */ |
| 1256 | static uint32_t GetUndisplayedCharactersBeforeFrame(nsTextFrame* aFrame) { |
| 1257 | void* value = aFrame->GetProperty(TextNodeCorrespondenceProperty()); |
| 1258 | TextNodeCorrespondence* correspondence = |
| 1259 | static_cast<TextNodeCorrespondence*>(value); |
| 1260 | if (!correspondence) { |
| 1261 | // FIXME bug 903785 |
| 1262 | NS_ERROR(do { NS_DebugBreak(NS_DEBUG_ASSERTION, "expected a TextNodeCorrespondenceProperty on nsTextFrame " "used for SVG text", "Error", "./../../../layout/svg/SVGTextFrame.cpp" , 1264); MOZ_PretendNoReturn(); } while (0) |
| 1263 | "expected a TextNodeCorrespondenceProperty on nsTextFrame "do { NS_DebugBreak(NS_DEBUG_ASSERTION, "expected a TextNodeCorrespondenceProperty on nsTextFrame " "used for SVG text", "Error", "./../../../layout/svg/SVGTextFrame.cpp" , 1264); MOZ_PretendNoReturn(); } while (0) |
| 1264 | "used for SVG text")do { NS_DebugBreak(NS_DEBUG_ASSERTION, "expected a TextNodeCorrespondenceProperty on nsTextFrame " "used for SVG text", "Error", "./../../../layout/svg/SVGTextFrame.cpp" , 1264); MOZ_PretendNoReturn(); } while (0); |
| 1265 | return 0; |
| 1266 | } |
| 1267 | return correspondence->mUndisplayedCharacters; |
| 1268 | } |
| 1269 | |
| 1270 | /** |
| 1271 | * Traverses the nsTextFrames for an SVGTextFrame and records a |
| 1272 | * TextNodeCorrespondenceProperty on each for the number of undisplayed DOM |
| 1273 | * characters between each frame. This is done by iterating simultaneously |
| 1274 | * over the Text and nsTextFrames and noting when Text (or |
| 1275 | * parts of them) are skipped when finding the next nsTextFrame. |
| 1276 | */ |
| 1277 | class TextNodeCorrespondenceRecorder { |
| 1278 | public: |
| 1279 | /** |
| 1280 | * Entry point for the TextNodeCorrespondenceProperty recording. |
| 1281 | */ |
| 1282 | static void RecordCorrespondence(SVGTextFrame* aRoot); |
| 1283 | |
| 1284 | private: |
| 1285 | explicit TextNodeCorrespondenceRecorder(SVGTextFrame* aRoot) |
| 1286 | : mNodeIterator(aRoot->GetContent()), |
| 1287 | mPreviousNode(nullptr), |
| 1288 | mNodeCharIndex(0) {} |
| 1289 | |
| 1290 | void Record(SVGTextFrame* aRoot); |
| 1291 | void TraverseAndRecord(nsIFrame* aFrame); |
| 1292 | |
| 1293 | /** |
| 1294 | * Returns the next non-empty Text. |
| 1295 | */ |
| 1296 | Text* NextNode(); |
| 1297 | |
| 1298 | /** |
| 1299 | * The iterator over the Text that we use as we simultaneously |
| 1300 | * iterate over the nsTextFrames. |
| 1301 | */ |
| 1302 | TextNodeIterator mNodeIterator; |
| 1303 | |
| 1304 | /** |
| 1305 | * The previous Text we iterated over. |
| 1306 | */ |
| 1307 | Text* mPreviousNode; |
| 1308 | |
| 1309 | /** |
| 1310 | * The index into the current Text's character content. |
| 1311 | */ |
| 1312 | uint32_t mNodeCharIndex; |
| 1313 | }; |
| 1314 | |
| 1315 | /* static */ |
| 1316 | void TextNodeCorrespondenceRecorder::RecordCorrespondence(SVGTextFrame* aRoot) { |
| 1317 | if (aRoot->HasAnyStateBits(NS_STATE_SVG_TEXT_CORRESPONDENCE_DIRTY)) { |
| 1318 | // Resolve bidi so that continuation frames are created if necessary: |
| 1319 | aRoot->MaybeResolveBidiForAnonymousBlockChild(); |
| 1320 | TextNodeCorrespondenceRecorder recorder(aRoot); |
| 1321 | recorder.Record(aRoot); |
| 1322 | aRoot->RemoveStateBits(NS_STATE_SVG_TEXT_CORRESPONDENCE_DIRTY); |
| 1323 | } |
| 1324 | } |
| 1325 | |
| 1326 | void TextNodeCorrespondenceRecorder::Record(SVGTextFrame* aRoot) { |
| 1327 | if (!mNodeIterator.GetCurrent()) { |
| 1328 | // If there are no Text nodes then there is nothing to do. |
| 1329 | return; |
| 1330 | } |
| 1331 | |
| 1332 | // Traverse over all the nsTextFrames and record the number of undisplayed |
| 1333 | // characters. |
| 1334 | TraverseAndRecord(aRoot); |
| 1335 | |
| 1336 | // Find how many undisplayed characters there are after the final nsTextFrame. |
| 1337 | uint32_t undisplayed = 0; |
| 1338 | if (mNodeIterator.GetCurrent()) { |
| 1339 | if (mPreviousNode && mPreviousNode->TextLength() != mNodeCharIndex) { |
| 1340 | // The last nsTextFrame ended part way through a Text node. The |
| 1341 | // remaining characters count as undisplayed. |
| 1342 | 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()" , "./../../../layout/svg/SVGTextFrame.cpp", 1344); MOZ_PretendNoReturn (); } } while (0) |
| 1343 | "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()" , "./../../../layout/svg/SVGTextFrame.cpp", 1344); MOZ_PretendNoReturn (); } } while (0) |
| 1344 | "text nodes")do { if (!(mNodeCharIndex < mPreviousNode->TextLength() )) { NS_DebugBreak(NS_DEBUG_ASSERTION, "incorrect tracking of undisplayed characters in " "text nodes", "mNodeCharIndex < mPreviousNode->TextLength()" , "./../../../layout/svg/SVGTextFrame.cpp", 1344); MOZ_PretendNoReturn (); } } while (0); |
| 1345 | undisplayed += mPreviousNode->TextLength() - mNodeCharIndex; |
| 1346 | } |
| 1347 | // All the remaining Text that we iterate must also be undisplayed. |
| 1348 | for (Text* textNode = mNodeIterator.GetCurrent(); textNode; |
| 1349 | textNode = NextNode()) { |
| 1350 | undisplayed += textNode->TextLength(); |
| 1351 | } |
| 1352 | } |
| 1353 | |
| 1354 | // Record the trailing number of undisplayed characters on the |
| 1355 | // SVGTextFrame. |
| 1356 | aRoot->mTrailingUndisplayedCharacters = undisplayed; |
| 1357 | } |
| 1358 | |
| 1359 | Text* TextNodeCorrespondenceRecorder::NextNode() { |
| 1360 | mPreviousNode = mNodeIterator.GetCurrent(); |
| 1361 | Text* next; |
| 1362 | do { |
| 1363 | next = mNodeIterator.GetNext(); |
| 1364 | } while (next && next->TextLength() == 0); |
| 1365 | return next; |
| 1366 | } |
| 1367 | |
| 1368 | void TextNodeCorrespondenceRecorder::TraverseAndRecord(nsIFrame* aFrame) { |
| 1369 | // Recursively iterate over the frame tree, for frames that correspond |
| 1370 | // to text content elements. |
| 1371 | if (IsTextContentElement(aFrame->GetContent())) { |
| 1372 | for (nsIFrame* f : aFrame->PrincipalChildList()) { |
| 1373 | TraverseAndRecord(f); |
| 1374 | } |
| 1375 | return; |
| 1376 | } |
| 1377 | |
| 1378 | nsTextFrame* frame; // The current text frame. |
| 1379 | Text* node; // The text node for the current text frame. |
| 1380 | if (!GetNonEmptyTextFrameAndNode(aFrame, frame, node)) { |
| 1381 | // If this isn't an nsTextFrame, or is empty, nothing to do. |
| 1382 | return; |
| 1383 | } |
| 1384 | |
| 1385 | 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", "./../../../layout/svg/SVGTextFrame.cpp" , 1386); MOZ_PretendNoReturn(); } } while (0) |
| 1386 | "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", "./../../../layout/svg/SVGTextFrame.cpp" , 1386); MOZ_PretendNoReturn(); } } while (0); |
| 1387 | |
| 1388 | uint32_t undisplayed = 0; |
| 1389 | if (!mPreviousNode) { |
| 1390 | // Must be the very first text frame. |
| 1391 | NS_ASSERTION(mNodeCharIndex == 0,do { if (!(mNodeCharIndex == 0)) { NS_DebugBreak(NS_DEBUG_ASSERTION , "incorrect tracking of undisplayed " "characters in text nodes" , "mNodeCharIndex == 0", "./../../../layout/svg/SVGTextFrame.cpp" , 1393); MOZ_PretendNoReturn(); } } while (0) |
| 1392 | "incorrect tracking of undisplayed "do { if (!(mNodeCharIndex == 0)) { NS_DebugBreak(NS_DEBUG_ASSERTION , "incorrect tracking of undisplayed " "characters in text nodes" , "mNodeCharIndex == 0", "./../../../layout/svg/SVGTextFrame.cpp" , 1393); MOZ_PretendNoReturn(); } } while (0) |
| 1393 | "characters in text nodes")do { if (!(mNodeCharIndex == 0)) { NS_DebugBreak(NS_DEBUG_ASSERTION , "incorrect tracking of undisplayed " "characters in text nodes" , "mNodeCharIndex == 0", "./../../../layout/svg/SVGTextFrame.cpp" , 1393); MOZ_PretendNoReturn(); } } while (0); |
| 1394 | if (!mNodeIterator.GetCurrent()) { |
| 1395 | 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" ")", "./../../../layout/svg/SVGTextFrame.cpp", 1397); AnnotateMozCrashReason ("MOZ_ASSERT" "(" "false" ") (" "MOZ_ASSERT_UNREACHABLE: " "incorrect tracking of correspondence between " "text frames and text nodes" ")"); do { MOZ_CrashSequence(__null , 1397); __attribute__((nomerge)) ::abort(); } while (false); } } while (false) |
| 1396 | "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" ")", "./../../../layout/svg/SVGTextFrame.cpp", 1397); AnnotateMozCrashReason ("MOZ_ASSERT" "(" "false" ") (" "MOZ_ASSERT_UNREACHABLE: " "incorrect tracking of correspondence between " "text frames and text nodes" ")"); do { MOZ_CrashSequence(__null , 1397); __attribute__((nomerge)) ::abort(); } while (false); } } while (false) |
| 1397 | "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" ")", "./../../../layout/svg/SVGTextFrame.cpp", 1397); AnnotateMozCrashReason ("MOZ_ASSERT" "(" "false" ") (" "MOZ_ASSERT_UNREACHABLE: " "incorrect tracking of correspondence between " "text frames and text nodes" ")"); do { MOZ_CrashSequence(__null , 1397); __attribute__((nomerge)) ::abort(); } while (false); } } while (false); |
| 1398 | } else { |
| 1399 | // Each whole Text we find before we get to the text node for the |
| 1400 | // first text frame must be undisplayed. |
| 1401 | while (mNodeIterator.GetCurrent() != node) { |
| 1402 | undisplayed += mNodeIterator.GetCurrent()->TextLength(); |
| 1403 | NextNode(); |
| 1404 | } |
| 1405 | // If the first text frame starts at a non-zero content offset, then those |
| 1406 | // earlier characters are also undisplayed. |
| 1407 | undisplayed += frame->GetContentOffset(); |
| 1408 | NextNode(); |
| 1409 | } |
| 1410 | } else if (mPreviousNode == node) { |
| 1411 | // Same text node as last time. |
| 1412 | if (static_cast<uint32_t>(frame->GetContentOffset()) != mNodeCharIndex) { |
| 1413 | // We have some characters in the middle of the text node |
| 1414 | // that are undisplayed. |
| 1415 | 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())" , "./../../../layout/svg/SVGTextFrame.cpp", 1418); MOZ_PretendNoReturn (); } } while (0) |
| 1416 | 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())" , "./../../../layout/svg/SVGTextFrame.cpp", 1418); MOZ_PretendNoReturn (); } } while (0) |
| 1417 | "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())" , "./../../../layout/svg/SVGTextFrame.cpp", 1418); MOZ_PretendNoReturn (); } } while (0) |
| 1418 | "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())" , "./../../../layout/svg/SVGTextFrame.cpp", 1418); MOZ_PretendNoReturn (); } } while (0); |
| 1419 | undisplayed = frame->GetContentOffset() - mNodeCharIndex; |
| 1420 | } |
| 1421 | } else { |
| 1422 | // Different text node from last time. |
| 1423 | if (mPreviousNode->TextLength() != mNodeCharIndex) { |
| 1424 | 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()" , "./../../../layout/svg/SVGTextFrame.cpp", 1426); MOZ_PretendNoReturn (); } } while (0) |
| 1425 | "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()" , "./../../../layout/svg/SVGTextFrame.cpp", 1426); MOZ_PretendNoReturn (); } } while (0) |
| 1426 | "text nodes")do { if (!(mNodeCharIndex < mPreviousNode->TextLength() )) { NS_DebugBreak(NS_DEBUG_ASSERTION, "incorrect tracking of undisplayed characters in " "text nodes", "mNodeCharIndex < mPreviousNode->TextLength()" , "./../../../layout/svg/SVGTextFrame.cpp", 1426); MOZ_PretendNoReturn (); } } while (0); |
| 1427 | // Any trailing characters at the end of the previous Text are |
| 1428 | // undisplayed. |
| 1429 | undisplayed = mPreviousNode->TextLength() - mNodeCharIndex; |
| 1430 | } |
| 1431 | // Each whole Text we find before we get to the text node for |
| 1432 | // the current text frame must be undisplayed. |
| 1433 | while (mNodeIterator.GetCurrent() && mNodeIterator.GetCurrent() != node) { |
| 1434 | undisplayed += mNodeIterator.GetCurrent()->TextLength(); |
| 1435 | NextNode(); |
| 1436 | } |
| 1437 | // If the current text frame starts at a non-zero content offset, then those |
| 1438 | // earlier characters are also undisplayed. |
| 1439 | undisplayed += frame->GetContentOffset(); |
| 1440 | NextNode(); |
| 1441 | } |
| 1442 | |
| 1443 | // Set the frame property. |
| 1444 | frame->SetProperty(TextNodeCorrespondenceProperty(), |
| 1445 | new TextNodeCorrespondence(undisplayed)); |
| 1446 | |
| 1447 | // Remember how far into the current Text we are. |
| 1448 | mNodeCharIndex = frame->GetContentEnd(); |
| 1449 | } |
| 1450 | |
| 1451 | // ---------------------------------------------------------------------------- |
| 1452 | // TextFrameIterator |
| 1453 | |
| 1454 | /** |
| 1455 | * An iterator class for nsTextFrames that are descendants of an |
| 1456 | * SVGTextFrame. The iterator can optionally track whether the |
| 1457 | * current nsTextFrame is for a descendant of, or past, a given subtree |
| 1458 | * content node or frame. (This functionality is used for example by the SVG |
| 1459 | * DOM text methods to get only the nsTextFrames for a particular <tspan>.) |
| 1460 | * |
| 1461 | * TextFrameIterator also tracks and exposes other information about the |
| 1462 | * current nsTextFrame: |
| 1463 | * |
| 1464 | * * how many undisplayed characters came just before it |
| 1465 | * * its position (in app units) relative to the SVGTextFrame's anonymous |
| 1466 | * block frame |
| 1467 | * * what nsInlineFrame corresponding to a <textPath> element it is a |
| 1468 | * descendant of |
| 1469 | * * what computed dominant-baseline value applies to it |
| 1470 | * |
| 1471 | * Note that any text frames that are empty -- whose ContentLength() is 0 -- |
| 1472 | * will be skipped over. |
| 1473 | */ |
| 1474 | class MOZ_STACK_CLASS TextFrameIterator { |
| 1475 | public: |
| 1476 | /** |
| 1477 | * Constructs a TextFrameIterator for the specified SVGTextFrame |
| 1478 | * with an optional frame subtree to restrict iterated text frames to. |
| 1479 | */ |
| 1480 | explicit TextFrameIterator(SVGTextFrame* aRoot, |
| 1481 | const nsIFrame* aSubtree = nullptr) |
| 1482 | : mRootFrame(aRoot), mCurrentFrame(aRoot) { |
| 1483 | Init(aSubtree); |
| 1484 | } |
| 1485 | |
| 1486 | /** |
| 1487 | * Constructs a TextFrameIterator for the specified SVGTextFrame |
| 1488 | * with an optional frame content subtree to restrict iterated text frames to. |
| 1489 | */ |
| 1490 | TextFrameIterator(SVGTextFrame* aRoot, const nsIContent* aSubtree) |
| 1491 | : mRootFrame(aRoot), mCurrentFrame(aRoot) { |
| 1492 | Init(aRoot && aSubtree && aSubtree != aRoot->GetContent() |
| 1493 | ? aSubtree->GetPrimaryFrame() |
| 1494 | : nullptr); |
| 1495 | } |
| 1496 | |
| 1497 | /** |
| 1498 | * Returns the root SVGTextFrame this TextFrameIterator is iterating over. |
| 1499 | * (May be nullptr, if nullptr was passed to our constructor.) |
| 1500 | */ |
| 1501 | SVGTextFrame* GetRoot() const { return mRootFrame; } |
| 1502 | |
| 1503 | /** |
| 1504 | * Returns the current nsTextFrame, or null if the iterator has finished. |
| 1505 | */ |
| 1506 | nsTextFrame* GetCurrent() const { return do_QueryFrame(mCurrentFrame); } |
| 1507 | |
| 1508 | /** |
| 1509 | * Returns the number of undisplayed characters in the DOM just before the |
| 1510 | * current frame. |
| 1511 | */ |
| 1512 | uint32_t UndisplayedCharacters() const; |
| 1513 | |
| 1514 | /** |
| 1515 | * Returns the current frame's position, in app units, relative to the |
| 1516 | * root SVGTextFrame's anonymous block frame. |
| 1517 | */ |
| 1518 | nsPoint Position() const { return mCurrentPosition; } |
| 1519 | |
| 1520 | /** |
| 1521 | * Advances to the next nsTextFrame and returns it, or null if the end of |
| 1522 | * iteration has been reached. |
| 1523 | */ |
| 1524 | nsTextFrame* GetNext(); |
| 1525 | |
| 1526 | /** |
| 1527 | * Returns whether the iterator is within the subtree. |
| 1528 | */ |
| 1529 | bool IsWithinSubtree() const { |
| 1530 | return mSubtreePosition == SubtreePosition::Within; |
| 1531 | } |
| 1532 | |
| 1533 | /** |
| 1534 | * Returns whether the iterator is past the subtree. |
| 1535 | */ |
| 1536 | bool IsAfterSubtree() const { |
| 1537 | return mSubtreePosition == SubtreePosition::After; |
| 1538 | } |
| 1539 | |
| 1540 | /** |
| 1541 | * Returns the frame corresponding to the <textPath> element, if we |
| 1542 | * are inside one. |
| 1543 | */ |
| 1544 | nsIFrame* TextPathFrame() const { |
| 1545 | return mTextPathFrames.IsEmpty() ? nullptr : mTextPathFrames.LastElement(); |
| 1546 | } |
| 1547 | |
| 1548 | /** |
| 1549 | * Returns the current frame's computed dominant-baseline value. |
| 1550 | */ |
| 1551 | StyleDominantBaseline DominantBaseline() const { |
| 1552 | return mBaselines.LastElement(); |
| 1553 | } |
| 1554 | |
| 1555 | /** |
| 1556 | * Finishes the iterator. |
| 1557 | */ |
| 1558 | void Close() { mCurrentFrame = nullptr; } |
| 1559 | |
| 1560 | private: |
| 1561 | /** |
| 1562 | * Initializes the iterator and advances to the first item. |
| 1563 | */ |
| 1564 | void Init(const nsIFrame* aSubtree) { |
| 1565 | for (const nsIFrame* f = aSubtree; f; f = f->GetNextContinuation()) { |
| 1566 | mSubtreeRoot.Insert(f); |
| 1567 | } |
| 1568 | mSubtreePosition = |
| 1569 | aSubtree ? SubtreePosition::Before : SubtreePosition::Within; |
| 1570 | if (!mRootFrame) { |
| 1571 | return; |
| 1572 | } |
| 1573 | |
| 1574 | mBaselines.AppendElement(mRootFrame->StyleVisibility()->mDominantBaseline); |
| 1575 | GetNext(); |
| 1576 | } |
| 1577 | |
| 1578 | /** |
| 1579 | * Pushes the specified frame's computed dominant-baseline value. |
| 1580 | * If the value of the property is "auto", then the parent frame's |
| 1581 | * computed value is used. |
| 1582 | */ |
| 1583 | void PushBaseline(nsIFrame* aNextFrame); |
| 1584 | |
| 1585 | /** |
| 1586 | * Pops the current dominant-baseline off the stack. |
| 1587 | */ |
| 1588 | void PopBaseline(); |
| 1589 | |
| 1590 | /** |
| 1591 | * The root frame we are iterating through. |
| 1592 | */ |
| 1593 | SVGTextFrame* const mRootFrame; |
| 1594 | |
| 1595 | /** |
| 1596 | * The root frame of any subtree we are interested in tracking |
| 1597 | * and its following continuations, if any. |
| 1598 | */ |
| 1599 | nsTHashSet<const nsIFrame*> mSubtreeRoot; |
| 1600 | |
| 1601 | /** |
| 1602 | * The current value of the iterator. |
| 1603 | */ |
| 1604 | nsIFrame* mCurrentFrame; |
| 1605 | |
| 1606 | /** |
| 1607 | * The position, in app units, of the current frame relative to mRootFrame. |
| 1608 | */ |
| 1609 | nsPoint mCurrentPosition; |
| 1610 | |
| 1611 | /** |
| 1612 | * Stack of frames corresponding to <textPath> elements that are in scope |
| 1613 | * for the current frame. |
| 1614 | */ |
| 1615 | AutoTArray<nsIFrame*, 1> mTextPathFrames; |
| 1616 | |
| 1617 | /** |
| 1618 | * Stack of dominant-baseline values to record as we traverse through the |
| 1619 | * frame tree. |
| 1620 | */ |
| 1621 | AutoTArray<StyleDominantBaseline, 8> mBaselines; |
| 1622 | |
| 1623 | /** |
| 1624 | * The iterator's current position relative to the subtree. |
| 1625 | */ |
| 1626 | SubtreePosition mSubtreePosition; |
| 1627 | }; |
| 1628 | |
| 1629 | uint32_t TextFrameIterator::UndisplayedCharacters() const { |
| 1630 | 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" ")", "./../../../layout/svg/SVGTextFrame.cpp" , 1632); AnnotateMozCrashReason("MOZ_ASSERT" "(" "!mRootFrame->HasAnyStateBits(NS_STATE_SVG_TEXT_CORRESPONDENCE_DIRTY)" ") (" "Text correspondence must be up to date" ")"); do { MOZ_CrashSequence (__null, 1632); __attribute__((nomerge)) ::abort(); } while ( false); } } while (false) |
| 1631 | !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" ")", "./../../../layout/svg/SVGTextFrame.cpp" , 1632); AnnotateMozCrashReason("MOZ_ASSERT" "(" "!mRootFrame->HasAnyStateBits(NS_STATE_SVG_TEXT_CORRESPONDENCE_DIRTY)" ") (" "Text correspondence must be up to date" ")"); do { MOZ_CrashSequence (__null, 1632); __attribute__((nomerge)) ::abort(); } while ( false); } } while (false) |
| 1632 | "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" ")", "./../../../layout/svg/SVGTextFrame.cpp" , 1632); AnnotateMozCrashReason("MOZ_ASSERT" "(" "!mRootFrame->HasAnyStateBits(NS_STATE_SVG_TEXT_CORRESPONDENCE_DIRTY)" ") (" "Text correspondence must be up to date" ")"); do { MOZ_CrashSequence (__null, 1632); __attribute__((nomerge)) ::abort(); } while ( false); } } while (false); |
| 1633 | |
| 1634 | if (!mCurrentFrame) { |
| 1635 | return mRootFrame->mTrailingUndisplayedCharacters; |
| 1636 | } |
| 1637 | |
| 1638 | nsTextFrame* frame = do_QueryFrame(mCurrentFrame); |
| 1639 | return GetUndisplayedCharactersBeforeFrame(frame); |
| 1640 | } |
| 1641 | |
| 1642 | nsTextFrame* TextFrameIterator::GetNext() { |
| 1643 | // Starting from mCurrentFrame, we do a non-recursive traversal to the next |
| 1644 | // nsTextFrame beneath mRoot, updating mSubtreePosition appropriately if we |
| 1645 | // encounter mSubtreeRoot. |
| 1646 | if (mCurrentFrame) { |
| 1647 | do { |
| 1648 | nsIFrame* next = IsTextContentElement(mCurrentFrame->GetContent()) |
| 1649 | ? mCurrentFrame->PrincipalChildList().FirstChild() |
| 1650 | : nullptr; |
| 1651 | if (next) { |
| 1652 | // Descend into this frame, and accumulate its position. |
| 1653 | mCurrentPosition += next->GetPosition(); |
| 1654 | if (next->GetContent()->IsSVGElement(nsGkAtoms::textPath)) { |
| 1655 | // Record this <textPath> frame. |
| 1656 | mTextPathFrames.AppendElement(next); |
| 1657 | } |
| 1658 | // Record the frame's baseline. |
| 1659 | PushBaseline(next); |
| 1660 | mCurrentFrame = next; |
| 1661 | if (mSubtreeRoot.Contains(mCurrentFrame)) { |
| 1662 | // If the current frame within mSubtreeRoot, we have now moved into |
| 1663 | // it. |
| 1664 | mSubtreePosition = SubtreePosition::Within; |
| 1665 | } |
| 1666 | } else { |
| 1667 | for (;;) { |
| 1668 | // We want to move past the current frame. |
| 1669 | if (mCurrentFrame == mRootFrame) { |
| 1670 | // If we've reached the root frame, we're finished. |
| 1671 | mCurrentFrame = nullptr; |
| 1672 | break; |
| 1673 | } |
| 1674 | // Remove the current frame's position. |
| 1675 | mCurrentPosition -= mCurrentFrame->GetPosition(); |
| 1676 | if (mCurrentFrame->GetContent()->IsSVGElement(nsGkAtoms::textPath)) { |
| 1677 | // Pop off the <textPath> frame if this is a <textPath>. |
| 1678 | mTextPathFrames.RemoveLastElement(); |
| 1679 | } |
| 1680 | // Pop off the current baseline. |
| 1681 | PopBaseline(); |
| 1682 | if (mSubtreeRoot.Contains(mCurrentFrame)) { |
| 1683 | // If this was within mSubtreeRoot, we have now moved past it. |
| 1684 | mSubtreePosition = SubtreePosition::After; |
| 1685 | } |
| 1686 | next = mCurrentFrame->GetNextSibling(); |
| 1687 | if (next) { |
| 1688 | // Moving to the next sibling. |
| 1689 | mCurrentPosition += next->GetPosition(); |
| 1690 | if (next->GetContent()->IsSVGElement(nsGkAtoms::textPath)) { |
| 1691 | // Record this <textPath> frame. |
| 1692 | mTextPathFrames.AppendElement(next); |
| 1693 | } |
| 1694 | // Record the frame's baseline. |
| 1695 | PushBaseline(next); |
| 1696 | mCurrentFrame = next; |
| 1697 | if (mSubtreeRoot.Contains(mCurrentFrame)) { |
| 1698 | // If the current frame is within mSubtreeRoot, we have now moved |
| 1699 | // into it. |
| 1700 | mSubtreePosition = SubtreePosition::Within; |
| 1701 | } |
| 1702 | break; |
| 1703 | } |
| 1704 | if (mSubtreeRoot.Contains(mCurrentFrame)) { |
| 1705 | // If there is no next sibling frame, and the current frame is |
| 1706 | // within mSubtreeRoot, we have now moved past it. |
| 1707 | mSubtreePosition = SubtreePosition::After; |
| 1708 | } |
| 1709 | // Ascend out of this frame. |
| 1710 | mCurrentFrame = mCurrentFrame->GetParent(); |
| 1711 | } |
| 1712 | } |
| 1713 | } while (mCurrentFrame && !IsNonEmptyTextFrame(mCurrentFrame)); |
| 1714 | } |
| 1715 | |
| 1716 | return GetCurrent(); |
| 1717 | } |
| 1718 | |
| 1719 | void TextFrameIterator::PushBaseline(nsIFrame* aNextFrame) { |
| 1720 | StyleDominantBaseline baseline = |
| 1721 | aNextFrame->StyleVisibility()->mDominantBaseline; |
| 1722 | mBaselines.AppendElement(baseline); |
| 1723 | } |
| 1724 | |
| 1725 | void TextFrameIterator::PopBaseline() { |
| 1726 | NS_ASSERTION(!mBaselines.IsEmpty(), "popped too many baselines")do { if (!(!mBaselines.IsEmpty())) { NS_DebugBreak(NS_DEBUG_ASSERTION , "popped too many baselines", "!mBaselines.IsEmpty()", "./../../../layout/svg/SVGTextFrame.cpp" , 1726); MOZ_PretendNoReturn(); } } while (0); |
| 1727 | mBaselines.RemoveLastElement(); |
| 1728 | } |
| 1729 | |
| 1730 | // ----------------------------------------------------------------------------- |
| 1731 | // TextRenderedRunIterator |
| 1732 | |
| 1733 | /** |
| 1734 | * Iterator for TextRenderedRun objects for the SVGTextFrame. |
| 1735 | */ |
| 1736 | class TextRenderedRunIterator { |
| 1737 | public: |
| 1738 | /** |
| 1739 | * Values for the aFilter argument of the constructor, to indicate which |
| 1740 | * frames we should be limited to iterating TextRenderedRun objects for. |
| 1741 | */ |
| 1742 | enum class RenderedRunFilter { |
| 1743 | // Iterate TextRenderedRuns for all nsTextFrames. |
| 1744 | AllFrames, |
| 1745 | // Iterate only TextRenderedRuns for nsTextFrames that are |
| 1746 | // visibility:visible. |
| 1747 | VisibleFrames |
| 1748 | }; |
| 1749 | |
| 1750 | /** |
| 1751 | * Constructs a TextRenderedRunIterator with an optional frame subtree to |
| 1752 | * restrict iterated rendered runs to. |
| 1753 | * |
| 1754 | * @param aSVGTextFrame The SVGTextFrame whose rendered runs to iterate |
| 1755 | * through. |
| 1756 | * @param aFilter Indicates whether to iterate rendered runs for non-visible |
| 1757 | * nsTextFrames. |
| 1758 | * @param aSubtree An optional frame subtree to restrict iterated rendered |
| 1759 | * runs to. |
| 1760 | */ |
| 1761 | explicit TextRenderedRunIterator( |
| 1762 | SVGTextFrame* aSVGTextFrame, |
| 1763 | RenderedRunFilter aFilter = RenderedRunFilter::AllFrames, |
| 1764 | const nsIFrame* aSubtree = nullptr) |
| 1765 | : mFrameIterator(FrameIfAnonymousChildReflowed(aSVGTextFrame), aSubtree), |
| 1766 | mFilter(aFilter), |
| 1767 | mTextElementCharIndex(0), |
| 1768 | mFrameStartTextElementCharIndex(0), |
| 1769 | mFontSizeScaleFactor(aSVGTextFrame->mFontSizeScaleFactor), |
| 1770 | mCurrent(First()) {} |
| 1771 | |
| 1772 | /** |
| 1773 | * Constructs a TextRenderedRunIterator with a content subtree to restrict |
| 1774 | * iterated rendered runs to. |
| 1775 | * |
| 1776 | * @param aSVGTextFrame The SVGTextFrame whose rendered runs to iterate |
| 1777 | * through. |
| 1778 | * @param aFilter Indicates whether to iterate rendered runs for non-visible |
| 1779 | * nsTextFrames. |
| 1780 | * @param aSubtree A content subtree to restrict iterated rendered runs to. |
| 1781 | */ |
| 1782 | TextRenderedRunIterator(SVGTextFrame* aSVGTextFrame, |
| 1783 | RenderedRunFilter aFilter, nsIContent* aSubtree) |
| 1784 | : mFrameIterator(FrameIfAnonymousChildReflowed(aSVGTextFrame), aSubtree), |
| 1785 | mFilter(aFilter), |
| 1786 | mTextElementCharIndex(0), |
| 1787 | mFrameStartTextElementCharIndex(0), |
| 1788 | mFontSizeScaleFactor(aSVGTextFrame->mFontSizeScaleFactor), |
| 1789 | mCurrent(First()) {} |
| 1790 | |
| 1791 | /** |
| 1792 | * Ensure any cached PropertyProvider is cleared at the end of the iteration. |
| 1793 | */ |
| 1794 | ~TextRenderedRunIterator() { |
| 1795 | if (auto* root = mFrameIterator.GetRoot()) { |
| 1796 | root->ForgetCachedProvider(); |
| 1797 | } |
| 1798 | } |
| 1799 | |
| 1800 | /** |
| 1801 | * Returns the current TextRenderedRun. |
| 1802 | */ |
| 1803 | TextRenderedRun Current() const { return mCurrent; } |
| 1804 | |
| 1805 | /** |
| 1806 | * Advances to the next TextRenderedRun and returns it. |
| 1807 | */ |
| 1808 | TextRenderedRun Next(); |
| 1809 | |
| 1810 | private: |
| 1811 | /** |
| 1812 | * Returns the root SVGTextFrame this iterator is for. |
| 1813 | */ |
| 1814 | SVGTextFrame* GetRoot() const { return mFrameIterator.GetRoot(); } |
| 1815 | |
| 1816 | /** |
| 1817 | * Advances to the first TextRenderedRun and returns it. |
| 1818 | */ |
| 1819 | TextRenderedRun First(); |
| 1820 | |
| 1821 | /** |
| 1822 | * The frame iterator to use. |
| 1823 | */ |
| 1824 | TextFrameIterator mFrameIterator; |
| 1825 | |
| 1826 | /** |
| 1827 | * The filter indicating which TextRenderedRuns to return. |
| 1828 | */ |
| 1829 | RenderedRunFilter mFilter; |
| 1830 | |
| 1831 | /** |
| 1832 | * The character index across the entire <text> element we are currently |
| 1833 | * up to. |
| 1834 | */ |
| 1835 | uint32_t mTextElementCharIndex; |
| 1836 | |
| 1837 | /** |
| 1838 | * The character index across the entire <text> for the start of the current |
| 1839 | * frame. |
| 1840 | */ |
| 1841 | uint32_t mFrameStartTextElementCharIndex; |
| 1842 | |
| 1843 | /** |
| 1844 | * The font-size scale factor we used when constructing the nsTextFrames. |
| 1845 | */ |
| 1846 | double mFontSizeScaleFactor; |
| 1847 | |
| 1848 | /** |
| 1849 | * The current TextRenderedRun. |
| 1850 | */ |
| 1851 | TextRenderedRun mCurrent; |
| 1852 | }; |
| 1853 | |
| 1854 | TextRenderedRun TextRenderedRunIterator::Next() { |
| 1855 | if (!mFrameIterator.GetCurrent()) { |
| 1856 | // If there are no more frames, then there are no more rendered runs to |
| 1857 | // return. |
| 1858 | mCurrent = TextRenderedRun(); |
| 1859 | return mCurrent; |
| 1860 | } |
| 1861 | |
| 1862 | // The values we will use to initialize the TextRenderedRun with. |
| 1863 | nsTextFrame* frame; |
| 1864 | gfxPoint pt; |
| 1865 | double rotate; |
| 1866 | nscoord baseline; |
| 1867 | uint32_t offset, length; |
| 1868 | uint32_t charIndex; |
| 1869 | |
| 1870 | // We loop, because we want to skip over rendered runs that either aren't |
| 1871 | // within our subtree of interest, because they don't match the filter, |
| 1872 | // or because they are hidden due to having fallen off the end of a |
| 1873 | // <textPath>. |
| 1874 | for (;;) { |
| 1875 | if (mFrameIterator.IsAfterSubtree()) { |
| 1876 | mCurrent = TextRenderedRun(); |
| 1877 | return mCurrent; |
| 1878 | } |
| 1879 | |
| 1880 | frame = mFrameIterator.GetCurrent(); |
| 1881 | |
| 1882 | charIndex = mTextElementCharIndex; |
| 1883 | |
| 1884 | // Find the end of the rendered run, by looking through the |
| 1885 | // SVGTextFrame's positions array until we find one that is recorded |
| 1886 | // as a run boundary. |
| 1887 | uint32_t runStart, |
| 1888 | runEnd; // XXX Replace runStart with mTextElementCharIndex. |
| 1889 | runStart = mTextElementCharIndex; |
| 1890 | runEnd = runStart + 1; |
| 1891 | while (runEnd < GetRoot()->mPositions.Length() && |
| 1892 | !GetRoot()->mPositions[runEnd].mRunBoundary) { |
| 1893 | runEnd++; |
| 1894 | } |
| 1895 | |
| 1896 | // Convert the global run start/end indexes into an offset/length into the |
| 1897 | // current frame's Text. |
| 1898 | offset = |
| 1899 | frame->GetContentOffset() + runStart - mFrameStartTextElementCharIndex; |
| 1900 | length = runEnd - runStart; |
| 1901 | |
| 1902 | // If the end of the frame's content comes before the run boundary we found |
| 1903 | // in SVGTextFrame's position array, we need to shorten the rendered run. |
| 1904 | uint32_t contentEnd = frame->GetContentEnd(); |
| 1905 | if (offset + length > contentEnd) { |
| 1906 | length = contentEnd - offset; |
| 1907 | } |
| 1908 | |
| 1909 | 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())" , "./../../../layout/svg/SVGTextFrame.cpp", 1910); MOZ_PretendNoReturn (); } } while (0) |
| 1910 | "invalid offset")do { if (!(offset >= uint32_t(frame->GetContentOffset() ))) { NS_DebugBreak(NS_DEBUG_ASSERTION, "invalid offset", "offset >= uint32_t(frame->GetContentOffset())" , "./../../../layout/svg/SVGTextFrame.cpp", 1910); MOZ_PretendNoReturn (); } } while (0); |
| 1911 | 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" , "./../../../layout/svg/SVGTextFrame.cpp", 1911); MOZ_PretendNoReturn (); } } while (0); |
| 1912 | |
| 1913 | // Get the frame's baseline position. |
| 1914 | frame->EnsureTextRun(nsTextFrame::eInflated); |
| 1915 | baseline = GetBaselinePosition( |
| 1916 | frame, frame->GetTextRun(nsTextFrame::eInflated), |
| 1917 | mFrameIterator.DominantBaseline(), mFontSizeScaleFactor); |
| 1918 | |
| 1919 | // Trim the offset/length to remove any leading/trailing white space. |
| 1920 | uint32_t untrimmedOffset = offset; |
| 1921 | uint32_t untrimmedLength = length; |
| 1922 | nsTextFrame::TrimmedOffsets trimmedOffsets = |
| 1923 | frame->GetTrimmedOffsets(frame->CharacterDataBuffer()); |
| 1924 | TrimOffsets(offset, length, trimmedOffsets); |
| 1925 | charIndex += offset - untrimmedOffset; |
| 1926 | |
| 1927 | // Get the position and rotation of the character that begins this |
| 1928 | // rendered run. |
| 1929 | pt = GetRoot()->mPositions[charIndex].mPosition; |
| 1930 | rotate = GetRoot()->mPositions[charIndex].mAngle; |
| 1931 | |
| 1932 | // Determine if we should skip this rendered run. |
| 1933 | bool skip = !mFrameIterator.IsWithinSubtree() || |
| 1934 | GetRoot()->mPositions[mTextElementCharIndex].mHidden; |
| 1935 | if (mFilter == RenderedRunFilter::VisibleFrames) { |
| 1936 | skip = skip || !frame->StyleVisibility()->IsVisible(); |
| 1937 | } |
| 1938 | |
| 1939 | // Update our global character index to move past the characters |
| 1940 | // corresponding to this rendered run. |
| 1941 | mTextElementCharIndex += untrimmedLength; |
| 1942 | |
| 1943 | // If we have moved past the end of the current frame's content, we need to |
| 1944 | // advance to the next frame. |
| 1945 | if (offset + untrimmedLength >= contentEnd) { |
| 1946 | mFrameIterator.GetNext(); |
| 1947 | mTextElementCharIndex += mFrameIterator.UndisplayedCharacters(); |
| 1948 | mFrameStartTextElementCharIndex = mTextElementCharIndex; |
| 1949 | } |
| 1950 | |
| 1951 | if (!mFrameIterator.GetCurrent()) { |
| 1952 | if (skip) { |
| 1953 | // That was the last frame, and we skipped this rendered run. So we |
| 1954 | // have no rendered run to return. |
| 1955 | mCurrent = TextRenderedRun(); |
| 1956 | return mCurrent; |
| 1957 | } |
| 1958 | break; |
| 1959 | } |
| 1960 | |
| 1961 | if (length && !skip) { |
| 1962 | // Only return a rendered run if it didn't get collapsed away entirely |
| 1963 | // (due to it being all white space) and if we don't want to skip it. |
| 1964 | break; |
| 1965 | } |
| 1966 | } |
| 1967 | |
| 1968 | mCurrent = TextRenderedRun(frame, GetRoot(), pt, rotate, mFontSizeScaleFactor, |
| 1969 | baseline, offset, length, charIndex); |
| 1970 | return mCurrent; |
| 1971 | } |
| 1972 | |
| 1973 | TextRenderedRun TextRenderedRunIterator::First() { |
| 1974 | if (!mFrameIterator.GetCurrent()) { |
| 1975 | return TextRenderedRun(); |
| 1976 | } |
| 1977 | |
| 1978 | if (GetRoot()->mPositions.IsEmpty()) { |
| 1979 | mFrameIterator.Close(); |
| 1980 | return TextRenderedRun(); |
| 1981 | } |
| 1982 | |
| 1983 | // Get the character index for the start of this rendered run, by skipping |
| 1984 | // any undisplayed characters. |
| 1985 | mTextElementCharIndex = mFrameIterator.UndisplayedCharacters(); |
| 1986 | mFrameStartTextElementCharIndex = mTextElementCharIndex; |
| 1987 | |
| 1988 | return Next(); |
| 1989 | } |
| 1990 | |
| 1991 | // ----------------------------------------------------------------------------- |
| 1992 | // CharIterator |
| 1993 | |
| 1994 | /** |
| 1995 | * Iterator for characters within an SVGTextFrame. |
| 1996 | */ |
| 1997 | class MOZ_STACK_CLASS CharIterator { |
| 1998 | using Range = gfxTextRun::Range; |
| 1999 | |
| 2000 | public: |
| 2001 | /** |
| 2002 | * Values for the aFilter argument of the constructor, to indicate which |
| 2003 | * characters we should be iterating over. |
| 2004 | */ |
| 2005 | enum class CharacterFilter { |
| 2006 | // Iterate over all original characters from the DOM that are within valid |
| 2007 | // text content elements. |
| 2008 | Original, |
| 2009 | // Iterate only over characters that are not skipped characters. |
| 2010 | Unskipped, |
| 2011 | // Iterate only over characters that are addressable by the positioning |
| 2012 | // attributes x="", y="", etc. This includes all characters after |
| 2013 | // collapsing white space as required by the value of 'white-space'. |
| 2014 | Addressable, |
| 2015 | }; |
| 2016 | |
| 2017 | /** |
| 2018 | * Constructs a CharIterator. |
| 2019 | * |
| 2020 | * @param aSVGTextFrame The SVGTextFrame whose characters to iterate |
| 2021 | * through. |
| 2022 | * @param aFilter Indicates which characters to iterate over. |
| 2023 | * @param aSubtree A content subtree to track whether the current character |
| 2024 | * is within. |
| 2025 | */ |
| 2026 | CharIterator(SVGTextFrame* aSVGTextFrame, CharacterFilter aFilter, |
| 2027 | nsIContent* aSubtree, bool aPostReflow = true); |
| 2028 | |
| 2029 | /** |
| 2030 | * Ensure any cached PropertyProvider is cleared at the end of the iteration. |
| 2031 | */ |
| 2032 | ~CharIterator() { |
| 2033 | if (auto* root = mFrameIterator.GetRoot()) { |
| 2034 | root->ForgetCachedProvider(); |
| 2035 | } |
| 2036 | } |
| 2037 | |
| 2038 | /** |
| 2039 | * Returns whether the iterator is finished. |
| 2040 | */ |
| 2041 | bool AtEnd() const { return !mFrameIterator.GetCurrent(); } |
| 2042 | |
| 2043 | /** |
| 2044 | * Advances to the next matching character. Returns true if there was a |
| 2045 | * character to advance to, and false otherwise. |
| 2046 | */ |
| 2047 | bool Next(); |
| 2048 | |
| 2049 | /** |
| 2050 | * Advances ahead aCount matching characters. Returns true if there were |
| 2051 | * enough characters to advance past, and false otherwise. |
| 2052 | */ |
| 2053 | bool Next(uint32_t aCount); |
| 2054 | |
| 2055 | /** |
| 2056 | * Advances ahead up to aCount matching characters. |
| 2057 | */ |
| 2058 | void NextWithinSubtree(uint32_t aCount); |
| 2059 | |
| 2060 | /** |
| 2061 | * Advances to the character with the specified index. The index is in the |
| 2062 | * space of original characters (i.e., all DOM characters under the <text> |
| 2063 | * that are within valid text content elements). |
| 2064 | */ |
| 2065 | bool AdvanceToCharacter(uint32_t aTextElementCharIndex); |
| 2066 | |
| 2067 | /** |
| 2068 | * Advances to the first matching character after the current nsTextFrame. |
| 2069 | */ |
| 2070 | bool AdvancePastCurrentFrame(); |
| 2071 | |
| 2072 | /** |
| 2073 | * Advances to the first matching character after the frames within |
| 2074 | * the current <textPath>. |
| 2075 | */ |
| 2076 | bool AdvancePastCurrentTextPathFrame(); |
| 2077 | |
| 2078 | /** |
| 2079 | * Advances to the first matching character of the subtree. Returns true |
| 2080 | * if we successfully advance to the subtree, or if we are already within |
| 2081 | * the subtree. Returns false if we are past the subtree. |
| 2082 | */ |
| 2083 | bool AdvanceToSubtree(); |
| 2084 | |
| 2085 | /** |
| 2086 | * Returns the nsTextFrame for the current character, or null if the end of |
| 2087 | * iteration has been reached. |
| 2088 | */ |
| 2089 | nsTextFrame* GetTextFrame() const { return mFrameIterator.GetCurrent(); } |
| 2090 | |
| 2091 | /** |
| 2092 | * Returns whether the iterator is within the subtree. |
| 2093 | */ |
| 2094 | bool IsWithinSubtree() const { return mFrameIterator.IsWithinSubtree(); } |
| 2095 | |
| 2096 | /** |
| 2097 | * Returns whether the iterator is past the subtree. |
| 2098 | */ |
| 2099 | bool IsAfterSubtree() const { return mFrameIterator.IsAfterSubtree(); } |
| 2100 | |
| 2101 | /** |
| 2102 | * Returns the iterator's computed dominant-baseline value. |
| 2103 | */ |
| 2104 | StyleDominantBaseline DominantBaseline() const { |
| 2105 | return mFrameIterator.DominantBaseline(); |
| 2106 | } |
| 2107 | |
| 2108 | /** |
| 2109 | * Returns whether the current character is a skipped character. |
| 2110 | */ |
| 2111 | bool IsOriginalCharSkipped() const { |
| 2112 | return mSkipCharsIterator.IsOriginalCharSkipped(); |
| 2113 | } |
| 2114 | |
| 2115 | /** |
| 2116 | * Returns whether the current character is the start of a cluster and |
| 2117 | * ligature group. |
| 2118 | */ |
| 2119 | bool IsClusterAndLigatureGroupStart() const { |
| 2120 | return mTextRun->IsLigatureGroupStart( |
| 2121 | mSkipCharsIterator.GetSkippedOffset()) && |
| 2122 | mTextRun->IsClusterStart(mSkipCharsIterator.GetSkippedOffset()); |
| 2123 | } |
| 2124 | |
| 2125 | /** |
| 2126 | * Returns the glyph run for the current character. |
| 2127 | */ |
| 2128 | const gfxTextRun::GlyphRun& GlyphRun() const { |
| 2129 | return *mTextRun->FindFirstGlyphRunContaining( |
| 2130 | mSkipCharsIterator.GetSkippedOffset()); |
| 2131 | } |
| 2132 | |
| 2133 | /** |
| 2134 | * Returns whether the current character is trimmed away when painting, |
| 2135 | * due to it being leading/trailing white space. |
| 2136 | */ |
| 2137 | bool IsOriginalCharTrimmed() const; |
| 2138 | |
| 2139 | /** |
| 2140 | * Returns whether the current character is unaddressable from the SVG glyph |
| 2141 | * positioning attributes. |
| 2142 | */ |
| 2143 | bool IsOriginalCharUnaddressable() const { |
| 2144 | return IsOriginalCharSkipped() || IsOriginalCharTrimmed(); |
| 2145 | } |
| 2146 | |
| 2147 | /** |
| 2148 | * Returns the text run for the current character. |
| 2149 | */ |
| 2150 | gfxTextRun* TextRun() const { return mTextRun; } |
| 2151 | |
| 2152 | /** |
| 2153 | * Returns the current character index. |
| 2154 | */ |
| 2155 | uint32_t TextElementCharIndex() const { return mTextElementCharIndex; } |
| 2156 | |
| 2157 | /** |
| 2158 | * Returns the character index for the start of the cluster/ligature group it |
| 2159 | * is part of. |
| 2160 | */ |
| 2161 | uint32_t GlyphStartTextElementCharIndex() const { |
| 2162 | return mGlyphStartTextElementCharIndex; |
| 2163 | } |
| 2164 | |
| 2165 | /** |
| 2166 | * Gets the advance, in user units, of the current character. If the |
| 2167 | * character is a part of ligature, then the advance returned will be |
| 2168 | * a fraction of the ligature glyph's advance. |
| 2169 | * |
| 2170 | * @param aContext The context to use for unit conversions. |
| 2171 | */ |
| 2172 | gfxFloat GetAdvance(nsPresContext* aContext) const; |
| 2173 | |
| 2174 | /** |
| 2175 | * Returns the frame corresponding to the <textPath> that the current |
| 2176 | * character is within. |
| 2177 | */ |
| 2178 | nsIFrame* TextPathFrame() const { return mFrameIterator.TextPathFrame(); } |
| 2179 | |
| 2180 | #ifdef DEBUG1 |
| 2181 | /** |
| 2182 | * Returns the subtree we were constructed with. |
| 2183 | */ |
| 2184 | nsIContent* GetSubtree() const { return mSubtree; } |
| 2185 | |
| 2186 | /** |
| 2187 | * Returns the CharacterFilter mode in use. |
| 2188 | */ |
| 2189 | CharacterFilter Filter() const { return mFilter; } |
| 2190 | #endif |
| 2191 | |
| 2192 | private: |
| 2193 | /** |
| 2194 | * Advances to the next character without checking it against the filter. |
| 2195 | * Returns true if there was a next character to advance to, or false |
| 2196 | * otherwise. |
| 2197 | */ |
| 2198 | bool NextCharacter(); |
| 2199 | |
| 2200 | /** |
| 2201 | * Returns whether the current character matches the filter. |
| 2202 | */ |
| 2203 | bool MatchesFilter() const; |
| 2204 | |
| 2205 | /** |
| 2206 | * If this is the start of a glyph, record it. |
| 2207 | */ |
| 2208 | void UpdateGlyphStartTextElementCharIndex() { |
| 2209 | if (!IsOriginalCharSkipped() && IsClusterAndLigatureGroupStart()) { |
| 2210 | mGlyphStartTextElementCharIndex = mTextElementCharIndex; |
| 2211 | } |
| 2212 | } |
| 2213 | |
| 2214 | /** |
| 2215 | * The filter to use. |
| 2216 | */ |
| 2217 | CharacterFilter mFilter; |
| 2218 | |
| 2219 | /** |
| 2220 | * The iterator for text frames. |
| 2221 | */ |
| 2222 | TextFrameIterator mFrameIterator; |
| 2223 | |
| 2224 | #ifdef DEBUG1 |
| 2225 | /** |
| 2226 | * The subtree we were constructed with. |
| 2227 | */ |
| 2228 | nsIContent* const mSubtree; |
| 2229 | #endif |
| 2230 | |
| 2231 | /** |
| 2232 | * A gfxSkipCharsIterator for the text frame the current character is |
| 2233 | * a part of. |
| 2234 | */ |
| 2235 | gfxSkipCharsIterator mSkipCharsIterator; |
| 2236 | |
| 2237 | // Cache for information computed by IsOriginalCharTrimmed. |
| 2238 | mutable nsTextFrame* mFrameForTrimCheck; |
| 2239 | mutable uint32_t mTrimmedOffset; |
| 2240 | mutable uint32_t mTrimmedLength; |
| 2241 | |
| 2242 | /** |
| 2243 | * The text run the current character is a part of. |
| 2244 | */ |
| 2245 | gfxTextRun* mTextRun; |
| 2246 | |
| 2247 | /** |
| 2248 | * The current character's index. |
| 2249 | */ |
| 2250 | uint32_t mTextElementCharIndex; |
| 2251 | |
| 2252 | /** |
| 2253 | * The index of the character that starts the cluster/ligature group the |
| 2254 | * current character is a part of. |
| 2255 | */ |
| 2256 | uint32_t mGlyphStartTextElementCharIndex; |
| 2257 | |
| 2258 | /** |
| 2259 | * The scale factor to apply to glyph advances returned by |
| 2260 | * GetAdvance etc. to take into account textLength="". |
| 2261 | */ |
| 2262 | float mLengthAdjustScaleFactor; |
| 2263 | |
| 2264 | /** |
| 2265 | * Whether the instance of this class is being used after reflow has occurred |
| 2266 | * or not. |
| 2267 | */ |
| 2268 | bool mPostReflow; |
| 2269 | }; |
| 2270 | |
| 2271 | CharIterator::CharIterator(SVGTextFrame* aSVGTextFrame, |
| 2272 | CharIterator::CharacterFilter aFilter, |
| 2273 | nsIContent* aSubtree, bool aPostReflow) |
| 2274 | : mFilter(aFilter), |
| 2275 | mFrameIterator(aSVGTextFrame, aSubtree), |
| 2276 | #ifdef DEBUG1 |
| 2277 | mSubtree(aSubtree), |
| 2278 | #endif |
| 2279 | mFrameForTrimCheck(nullptr), |
| 2280 | mTrimmedOffset(0), |
| 2281 | mTrimmedLength(0), |
| 2282 | mTextRun(nullptr), |
| 2283 | mTextElementCharIndex(0), |
| 2284 | mGlyphStartTextElementCharIndex(0), |
| 2285 | mLengthAdjustScaleFactor(aSVGTextFrame->mLengthAdjustScaleFactor), |
| 2286 | mPostReflow(aPostReflow) { |
| 2287 | if (!AtEnd()) { |
| 2288 | mSkipCharsIterator = GetTextFrame()->EnsureTextRun(nsTextFrame::eInflated); |
| 2289 | mTextRun = GetTextFrame()->GetTextRun(nsTextFrame::eInflated); |
| 2290 | mTextElementCharIndex = mFrameIterator.UndisplayedCharacters(); |
| 2291 | UpdateGlyphStartTextElementCharIndex(); |
| 2292 | if (!MatchesFilter()) { |
| 2293 | Next(); |
| 2294 | } |
| 2295 | } |
| 2296 | } |
| 2297 | |
| 2298 | bool CharIterator::Next() { |
| 2299 | while (NextCharacter()) { |
| 2300 | if (MatchesFilter()) { |
| 2301 | return true; |
| 2302 | } |
| 2303 | } |
| 2304 | return false; |
| 2305 | } |
| 2306 | |
| 2307 | bool CharIterator::Next(uint32_t aCount) { |
| 2308 | if (aCount == 0 && AtEnd()) { |
| 2309 | return false; |
| 2310 | } |
| 2311 | while (aCount) { |
| 2312 | if (!Next()) { |
| 2313 | return false; |
| 2314 | } |
| 2315 | aCount--; |
| 2316 | } |
| 2317 | return true; |
| 2318 | } |
| 2319 | |
| 2320 | void CharIterator::NextWithinSubtree(uint32_t aCount) { |
| 2321 | while (IsWithinSubtree() && aCount) { |
| 2322 | --aCount; |
| 2323 | if (!Next()) { |
| 2324 | return; |
| 2325 | } |
| 2326 | } |
| 2327 | } |
| 2328 | |
| 2329 | bool CharIterator::AdvanceToCharacter(uint32_t aTextElementCharIndex) { |
| 2330 | while (mTextElementCharIndex < aTextElementCharIndex) { |
| 2331 | if (!Next()) { |
| 2332 | return false; |
| 2333 | } |
| 2334 | } |
| 2335 | return true; |
| 2336 | } |
| 2337 | |
| 2338 | bool CharIterator::AdvancePastCurrentFrame() { |
| 2339 | // XXX Can do this better than one character at a time if it matters. |
| 2340 | nsTextFrame* currentFrame = GetTextFrame(); |
| 2341 | do { |
| 2342 | if (!Next()) { |
| 2343 | return false; |
| 2344 | } |
| 2345 | } while (GetTextFrame() == currentFrame); |
| 2346 | return true; |
| 2347 | } |
| 2348 | |
| 2349 | bool CharIterator::AdvancePastCurrentTextPathFrame() { |
| 2350 | nsIFrame* currentTextPathFrame = TextPathFrame(); |
| 2351 | NS_ASSERTION(currentTextPathFrame,do { if (!(currentTextPathFrame)) { NS_DebugBreak(NS_DEBUG_ASSERTION , "expected AdvancePastCurrentTextPathFrame to be called only " "within a text path frame", "currentTextPathFrame", "./../../../layout/svg/SVGTextFrame.cpp" , 2353); MOZ_PretendNoReturn(); } } while (0) |
| 2352 | "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", "./../../../layout/svg/SVGTextFrame.cpp" , 2353); MOZ_PretendNoReturn(); } } while (0) |
| 2353 | "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", "./../../../layout/svg/SVGTextFrame.cpp" , 2353); MOZ_PretendNoReturn(); } } while (0); |
| 2354 | do { |
| 2355 | if (!AdvancePastCurrentFrame()) { |
| 2356 | return false; |
| 2357 | } |
| 2358 | } while (TextPathFrame() == currentTextPathFrame); |
| 2359 | return true; |
| 2360 | } |
| 2361 | |
| 2362 | bool CharIterator::AdvanceToSubtree() { |
| 2363 | while (!IsWithinSubtree()) { |
| 2364 | if (IsAfterSubtree()) { |
| 2365 | return false; |
| 2366 | } |
| 2367 | if (!AdvancePastCurrentFrame()) { |
| 2368 | return false; |
| 2369 | } |
| 2370 | } |
| 2371 | return true; |
| 2372 | } |
| 2373 | |
| 2374 | bool CharIterator::IsOriginalCharTrimmed() const { |
| 2375 | if (mFrameForTrimCheck != GetTextFrame()) { |
| 2376 | // Since we do a lot of trim checking, we cache the trimmed offsets and |
| 2377 | // lengths while we are in the same frame. |
| 2378 | mFrameForTrimCheck = GetTextFrame(); |
| 2379 | uint32_t offset = mFrameForTrimCheck->GetContentOffset(); |
| 2380 | uint32_t length = mFrameForTrimCheck->GetContentLength(); |
| 2381 | nsTextFrame::TrimmedOffsets trim = mFrameForTrimCheck->GetTrimmedOffsets( |
| 2382 | mFrameForTrimCheck->CharacterDataBuffer(), |
| 2383 | (mPostReflow ? nsTextFrame::TrimmedOffsetFlags::Default |
| 2384 | : nsTextFrame::TrimmedOffsetFlags::NotPostReflow)); |
| 2385 | TrimOffsets(offset, length, trim); |
| 2386 | mTrimmedOffset = offset; |
| 2387 | mTrimmedLength = length; |
| 2388 | } |
| 2389 | |
| 2390 | // A character is trimmed if it is outside the mTrimmedOffset/mTrimmedLength |
| 2391 | // range and it is not a significant newline character. |
| 2392 | uint32_t index = mSkipCharsIterator.GetOriginalOffset(); |
| 2393 | return !( |
| 2394 | (index >= mTrimmedOffset && index < mTrimmedOffset + mTrimmedLength) || |
| 2395 | (index >= mTrimmedOffset + mTrimmedLength && |
| 2396 | mFrameForTrimCheck->StyleText()->NewlineIsSignificant( |
| 2397 | mFrameForTrimCheck) && |
| 2398 | mFrameForTrimCheck->CharacterDataBuffer().CharAt(index) == '\n')); |
| 2399 | } |
| 2400 | |
| 2401 | gfxFloat CharIterator::GetAdvance(nsPresContext* aContext) const { |
| 2402 | float cssPxPerDevPx = |
| 2403 | nsPresContext::AppUnitsToFloatCSSPixels(aContext->AppUnitsPerDevPixel()); |
| 2404 | |
| 2405 | auto& provider = |
| 2406 | mFrameIterator.GetRoot()->PropertyProviderFor(GetTextFrame()); |
| 2407 | uint32_t offset = mSkipCharsIterator.GetSkippedOffset(); |
| 2408 | gfxFloat advance = |
| 2409 | mTextRun->GetAdvanceWidth(Range(offset, offset + 1), &provider); |
| 2410 | return aContext->AppUnitsToGfxUnits(advance) * mLengthAdjustScaleFactor * |
| 2411 | cssPxPerDevPx; |
| 2412 | } |
| 2413 | |
| 2414 | bool CharIterator::NextCharacter() { |
| 2415 | if (AtEnd()) { |
| 2416 | return false; |
| 2417 | } |
| 2418 | |
| 2419 | mTextElementCharIndex++; |
| 2420 | |
| 2421 | // Advance within the current text run. |
| 2422 | mSkipCharsIterator.AdvanceOriginal(1); |
| 2423 | if (mSkipCharsIterator.GetOriginalOffset() < |
| 2424 | GetTextFrame()->GetContentEnd()) { |
| 2425 | // We're still within the part of the text run for the current text frame. |
| 2426 | UpdateGlyphStartTextElementCharIndex(); |
| 2427 | return true; |
| 2428 | } |
| 2429 | |
| 2430 | // Advance to the next frame. |
| 2431 | mFrameIterator.GetNext(); |
| 2432 | |
| 2433 | // Skip any undisplayed characters. |
| 2434 | uint32_t undisplayed = mFrameIterator.UndisplayedCharacters(); |
| 2435 | mTextElementCharIndex += undisplayed; |
| 2436 | if (!GetTextFrame()) { |
| 2437 | // We're at the end. |
| 2438 | mSkipCharsIterator = gfxSkipCharsIterator(); |
| 2439 | return false; |
| 2440 | } |
| 2441 | |
| 2442 | mSkipCharsIterator = GetTextFrame()->EnsureTextRun(nsTextFrame::eInflated); |
| 2443 | mTextRun = GetTextFrame()->GetTextRun(nsTextFrame::eInflated); |
| 2444 | UpdateGlyphStartTextElementCharIndex(); |
| 2445 | return true; |
| 2446 | } |
| 2447 | |
| 2448 | bool CharIterator::MatchesFilter() const { |
| 2449 | switch (mFilter) { |
| 2450 | case CharacterFilter::Original: |
| 2451 | return true; |
| 2452 | case CharacterFilter::Unskipped: |
| 2453 | return !IsOriginalCharSkipped(); |
| 2454 | case CharacterFilter::Addressable: |
| 2455 | return !IsOriginalCharSkipped() && !IsOriginalCharUnaddressable(); |
| 2456 | } |
| 2457 | 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" ")", "./../../../layout/svg/SVGTextFrame.cpp" , 2457); AnnotateMozCrashReason("MOZ_ASSERT" "(" "false" ") (" "MOZ_ASSERT_UNREACHABLE: " "Invalid mFilter value" ")"); do { MOZ_CrashSequence(__null, 2457); __attribute__((nomerge)) :: abort(); } while (false); } } while (false); |
| 2458 | return true; |
| 2459 | } |
| 2460 | |
| 2461 | // ----------------------------------------------------------------------------- |
| 2462 | // SVGTextDrawPathCallbacks |
| 2463 | |
| 2464 | /** |
| 2465 | * Text frame draw callback class that paints the text and text decoration parts |
| 2466 | * of an nsTextFrame using SVG painting properties, and selection backgrounds |
| 2467 | * and decorations as they would normally. |
| 2468 | * |
| 2469 | * An instance of this class is passed to nsTextFrame::PaintText if painting |
| 2470 | * cannot be done directly (e.g. if we are using an SVG pattern fill, stroking |
| 2471 | * the text, etc.). |
| 2472 | */ |
| 2473 | class SVGTextDrawPathCallbacks final : public nsTextFrame::DrawPathCallbacks { |
| 2474 | using imgDrawingParams = image::imgDrawingParams; |
| 2475 | |
| 2476 | public: |
| 2477 | /** |
| 2478 | * Constructs an SVGTextDrawPathCallbacks. |
| 2479 | * |
| 2480 | * @param aSVGTextFrame The ancestor text frame. |
| 2481 | * @param aContextPaint Used by context-fill and context-stroke. |
| 2482 | * @param aContext The context to use for painting. |
| 2483 | * @param aFrame The nsTextFrame to paint. |
| 2484 | * @param aCanvasTM The transformation matrix to set when painting; this |
| 2485 | * should be the FOR_OUTERSVG_TM canvas TM of the text, so that |
| 2486 | * paint servers are painted correctly. |
| 2487 | * @param aImgParams Whether we need to synchronously decode images. |
| 2488 | * @param aShouldPaintSVGGlyphs Whether SVG glyphs should be painted. |
| 2489 | */ |
| 2490 | SVGTextDrawPathCallbacks(SVGTextFrame* aSVGTextFrame, |
| 2491 | SVGContextPaint* aContextPaint, gfxContext& aContext, |
| 2492 | nsTextFrame* aFrame, const gfxMatrix& aCanvasTM, |
| 2493 | imgDrawingParams& aImgParams, |
| 2494 | bool aShouldPaintSVGGlyphs) |
| 2495 | : DrawPathCallbacks(aShouldPaintSVGGlyphs), |
| 2496 | mSVGTextFrame(aSVGTextFrame), |
| 2497 | mContextPaint(aContextPaint), |
| 2498 | mContext(aContext), |
| 2499 | mFrame(aFrame), |
| 2500 | mCanvasTM(aCanvasTM), |
| 2501 | mImgParams(aImgParams) {} |
| 2502 | |
| 2503 | void NotifySelectionBackgroundNeedsFill(const Rect& aBackgroundRect, |
| 2504 | nscolor aColor, |
| 2505 | DrawTarget& aDrawTarget) override; |
| 2506 | void PaintDecorationLine(Rect aPath, bool aPaintingShadows, |
| 2507 | nscolor aColor) override; |
| 2508 | void PaintSelectionDecorationLine(Rect aPath, bool aPaintingShadows, |
| 2509 | nscolor aColor) override; |
| 2510 | void NotifyBeforeText(bool aPaintingShadows, nscolor aColor) override; |
| 2511 | void NotifyGlyphPathEmitted() override; |
| 2512 | void NotifyAfterText() override; |
| 2513 | |
| 2514 | private: |
| 2515 | void SetupContext(); |
| 2516 | |
| 2517 | bool IsClipPathChild() const { |
| 2518 | return mSVGTextFrame->HasAnyStateBits(NS_STATE_SVG_CLIPPATH_CHILD); |
| 2519 | } |
| 2520 | |
| 2521 | /** |
| 2522 | * Paints a piece of text geometry. This is called when glyphs |
| 2523 | * or text decorations have been emitted to the gfxContext. |
| 2524 | */ |
| 2525 | void HandleTextGeometry(); |
| 2526 | |
| 2527 | /** |
| 2528 | * Sets the gfxContext paint to the appropriate color or pattern |
| 2529 | * for filling text geometry. |
| 2530 | */ |
| 2531 | void MakeFillPattern(GeneralPattern* aOutPattern); |
| 2532 | |
| 2533 | /** |
| 2534 | * Fills and strokes a piece of text geometry, using group opacity |
| 2535 | * if the selection style requires it. |
| 2536 | */ |
| 2537 | void FillAndStrokeGeometry(); |
| 2538 | |
| 2539 | /** |
| 2540 | * Fills a piece of text geometry. |
| 2541 | */ |
| 2542 | void FillGeometry(); |
| 2543 | |
| 2544 | /** |
| 2545 | * Strokes a piece of text geometry. |
| 2546 | */ |
| 2547 | void StrokeGeometry(); |
| 2548 | |
| 2549 | /* |
| 2550 | * Takes a colour and modifies it to account for opacity properties. |
| 2551 | */ |
| 2552 | void ApplyOpacity(sRGBColor& aColor, const StyleSVGPaint& aPaint, |
| 2553 | const StyleSVGOpacity& aOpacity) const; |
| 2554 | |
| 2555 | SVGTextFrame* const mSVGTextFrame; |
| 2556 | SVGContextPaint* const mContextPaint; |
| 2557 | gfxContext& mContext; |
| 2558 | nsTextFrame* const mFrame; |
| 2559 | const gfxMatrix& mCanvasTM; |
| 2560 | imgDrawingParams& mImgParams; |
| 2561 | |
| 2562 | /** |
| 2563 | * The color that we were last told from one of the path callback functions. |
| 2564 | * This color can be the special NS_SAME_AS_FOREGROUND_COLOR, |
| 2565 | * NS_40PERCENT_FOREGROUND_COLOR and NS_TRANSPARENT colors when we are |
| 2566 | * painting selections or IME decorations. |
| 2567 | */ |
| 2568 | nscolor mColor = NS_RGBA(0, 0, 0, 0)((nscolor)(((0) << 24) | ((0) << 16) | ((0) << 8) | (0))); |
| 2569 | |
| 2570 | /** |
| 2571 | * Whether we're painting text shadows. |
| 2572 | */ |
| 2573 | bool mPaintingShadows = false; |
| 2574 | }; |
| 2575 | |
| 2576 | void SVGTextDrawPathCallbacks::NotifySelectionBackgroundNeedsFill( |
| 2577 | const Rect& aBackgroundRect, nscolor aColor, DrawTarget& aDrawTarget) { |
| 2578 | if (IsClipPathChild()) { |
| 2579 | // Don't paint selection backgrounds when in a clip path. |
| 2580 | return; |
| 2581 | } |
| 2582 | |
| 2583 | mColor = aColor; // currently needed by MakeFillPattern |
| 2584 | mPaintingShadows = false; |
| 2585 | |
| 2586 | GeneralPattern fillPattern; |
| 2587 | MakeFillPattern(&fillPattern); |
| 2588 | if (fillPattern.GetPattern()) { |
| 2589 | DrawOptions drawOptions(aColor == NS_40PERCENT_FOREGROUND_COLOR ? 0.4 |
| 2590 | : 1.0); |
| 2591 | aDrawTarget.FillRect(aBackgroundRect, fillPattern, drawOptions); |
| 2592 | } |
| 2593 | } |
| 2594 | |
| 2595 | void SVGTextDrawPathCallbacks::NotifyBeforeText(bool aPaintingShadows, |
| 2596 | nscolor aColor) { |
| 2597 | mColor = aColor; |
| 2598 | mPaintingShadows = aPaintingShadows; |
| 2599 | SetupContext(); |
| 2600 | mContext.NewPath(); |
| 2601 | } |
| 2602 | |
| 2603 | void SVGTextDrawPathCallbacks::NotifyGlyphPathEmitted() { |
| 2604 | HandleTextGeometry(); |
| 2605 | mContext.NewPath(); |
| 2606 | } |
| 2607 | |
| 2608 | void SVGTextDrawPathCallbacks::NotifyAfterText() { mContext.Restore(); } |
| 2609 | |
| 2610 | void SVGTextDrawPathCallbacks::PaintDecorationLine(Rect aPath, |
| 2611 | bool aPaintingShadows, |
| 2612 | nscolor aColor) { |
| 2613 | mColor = aColor; |
| 2614 | mPaintingShadows = aPaintingShadows; |
| 2615 | AntialiasMode aaMode = |
| 2616 | SVGUtils::ToAntialiasMode(mFrame->StyleText()->mTextRendering); |
| 2617 | |
| 2618 | mContext.Save(); |
| 2619 | mContext.NewPath(); |
| 2620 | mContext.SetAntialiasMode(aaMode); |
| 2621 | mContext.Rectangle(ThebesRect(aPath)); |
| 2622 | HandleTextGeometry(); |
| 2623 | mContext.NewPath(); |
| 2624 | mContext.Restore(); |
| 2625 | } |
| 2626 | |
| 2627 | void SVGTextDrawPathCallbacks::PaintSelectionDecorationLine( |
| 2628 | Rect aPath, bool aPaintingShadows, nscolor aColor) { |
| 2629 | if (IsClipPathChild()) { |
| 2630 | // Don't paint selection decorations when in a clip path. |
| 2631 | return; |
| 2632 | } |
| 2633 | |
| 2634 | mColor = aColor; |
| 2635 | mPaintingShadows = aPaintingShadows; |
| 2636 | |
| 2637 | mContext.Save(); |
| 2638 | mContext.NewPath(); |
| 2639 | mContext.Rectangle(ThebesRect(aPath)); |
| 2640 | FillAndStrokeGeometry(); |
| 2641 | mContext.Restore(); |
| 2642 | } |
| 2643 | |
| 2644 | void SVGTextDrawPathCallbacks::SetupContext() { |
| 2645 | mContext.Save(); |
| 2646 | |
| 2647 | // XXX This is copied from nsSVGGlyphFrame::Render, but cairo doesn't actually |
| 2648 | // seem to do anything with the antialias mode. So we can perhaps remove it, |
| 2649 | // or make SetAntialiasMode set cairo text antialiasing too. |
| 2650 | mContext.SetAntialiasMode( |
| 2651 | SVGUtils::ToAntialiasMode(mFrame->StyleText()->mTextRendering)); |
| 2652 | } |
| 2653 | |
| 2654 | void SVGTextDrawPathCallbacks::HandleTextGeometry() { |
| 2655 | if (IsClipPathChild()) { |
| 2656 | RefPtr<Path> path = mContext.GetPath(); |
| 2657 | ColorPattern white( |
| 2658 | DeviceColor(1.f, 1.f, 1.f, 1.f)); // for masking, so no ToDeviceColor |
| 2659 | mContext.GetDrawTarget()->Fill(path, white); |
| 2660 | } else { |
| 2661 | // Normal painting. |
| 2662 | gfxContextMatrixAutoSaveRestore saveMatrix(&mContext); |
| 2663 | mContext.SetMatrixDouble(mCanvasTM); |
| 2664 | |
| 2665 | FillAndStrokeGeometry(); |
| 2666 | } |
| 2667 | } |
| 2668 | |
| 2669 | void SVGTextDrawPathCallbacks::ApplyOpacity( |
| 2670 | sRGBColor& aColor, const StyleSVGPaint& aPaint, |
| 2671 | const StyleSVGOpacity& aOpacity) const { |
| 2672 | if (aPaint.kind.tag == StyleSVGPaintKind::Tag::Color) { |
| 2673 | aColor.a *= |
| 2674 | sRGBColor::FromABGR(aPaint.kind.AsColor().CalcColor(*mFrame->Style())) |
| 2675 | .a; |
| 2676 | } |
| 2677 | aColor.a *= SVGUtils::GetOpacity(aOpacity, mContextPaint); |
| 2678 | } |
| 2679 | |
| 2680 | void SVGTextDrawPathCallbacks::MakeFillPattern(GeneralPattern* aOutPattern) { |
| 2681 | if (mColor == NS_SAME_AS_FOREGROUND_COLOR || |
| 2682 | mColor == NS_40PERCENT_FOREGROUND_COLOR) { |
| 2683 | SVGUtils::MakeFillPatternFor(mFrame, &mContext, aOutPattern, mImgParams, |
| 2684 | mContextPaint); |
| 2685 | return; |
| 2686 | } |
| 2687 | |
| 2688 | if (mColor == NS_TRANSPARENT) { |
| 2689 | return; |
| 2690 | } |
| 2691 | |
| 2692 | sRGBColor color(sRGBColor::FromABGR(mColor)); |
| 2693 | if (mPaintingShadows) { |
| 2694 | ApplyOpacity(color, mFrame->StyleSVG()->mFill, |
| 2695 | mFrame->StyleSVG()->mFillOpacity); |
| 2696 | } |
| 2697 | aOutPattern->InitColorPattern(ToDeviceColor(color)); |
| 2698 | } |
| 2699 | |
| 2700 | void SVGTextDrawPathCallbacks::FillAndStrokeGeometry() { |
| 2701 | gfxGroupForBlendAutoSaveRestore autoGroupForBlend(&mContext); |
| 2702 | if (mColor == NS_40PERCENT_FOREGROUND_COLOR) { |
| 2703 | autoGroupForBlend.PushGroupForBlendBack(gfxContentType::COLOR_ALPHA, 0.4f); |
| 2704 | } |
| 2705 | |
| 2706 | uint32_t paintOrder = mFrame->StyleSVG()->mPaintOrder; |
| 2707 | if (!paintOrder) { |
| 2708 | FillGeometry(); |
| 2709 | StrokeGeometry(); |
| 2710 | } else { |
| 2711 | while (paintOrder) { |
| 2712 | auto component = StylePaintOrder(paintOrder & kPaintOrderMask); |
| 2713 | switch (component) { |
| 2714 | case StylePaintOrder::Fill: |
| 2715 | FillGeometry(); |
| 2716 | break; |
| 2717 | case StylePaintOrder::Stroke: |
| 2718 | StrokeGeometry(); |
| 2719 | break; |
| 2720 | default: |
| 2721 | MOZ_FALLTHROUGH_ASSERT("Unknown paint-order value")do { do { } while (false); MOZ_ReportCrash("" "MOZ_FALLTHROUGH_ASSERT: " "Unknown paint-order value", "./../../../layout/svg/SVGTextFrame.cpp" , 2721); AnnotateMozCrashReason("MOZ_CRASH(" "MOZ_FALLTHROUGH_ASSERT: " "Unknown paint-order value" ")"); do { MOZ_CrashSequence(__null , 2721); __attribute__((nomerge)) ::abort(); } while (false); } while (false); |
| 2722 | case StylePaintOrder::Markers: |
| 2723 | case StylePaintOrder::Normal: |
| 2724 | break; |
| 2725 | } |
| 2726 | paintOrder >>= kPaintOrderShift; |
| 2727 | } |
| 2728 | } |
| 2729 | } |
| 2730 | |
| 2731 | void SVGTextDrawPathCallbacks::FillGeometry() { |
| 2732 | if (mFrame->StyleSVG()->mFill.kind.IsNone()) { |
| 2733 | return; |
| 2734 | } |
| 2735 | GeneralPattern fillPattern; |
| 2736 | MakeFillPattern(&fillPattern); |
| 2737 | if (fillPattern.GetPattern()) { |
| 2738 | RefPtr<Path> path = mContext.GetPath(); |
| 2739 | FillRule fillRule = SVGUtils::ToFillRule(mFrame->StyleSVG()->mFillRule); |
| 2740 | if (fillRule != path->GetFillRule()) { |
| 2741 | Path::SetFillRule(path, fillRule); |
| 2742 | } |
| 2743 | mContext.GetDrawTarget()->Fill(path, fillPattern); |
| 2744 | } |
| 2745 | } |
| 2746 | |
| 2747 | void SVGTextDrawPathCallbacks::StrokeGeometry() { |
| 2748 | // We don't paint the stroke when we are filling with a selection color. |
| 2749 | if (!(mColor == NS_SAME_AS_FOREGROUND_COLOR || |
| 2750 | mColor == NS_40PERCENT_FOREGROUND_COLOR || mPaintingShadows)) { |
| 2751 | return; |
| 2752 | } |
| 2753 | |
| 2754 | if (!SVGUtils::HasStroke(mFrame, mContextPaint)) { |
| 2755 | return; |
| 2756 | } |
| 2757 | |
| 2758 | GeneralPattern strokePattern; |
| 2759 | if (mPaintingShadows) { |
| 2760 | sRGBColor color(sRGBColor::FromABGR(mColor)); |
| 2761 | ApplyOpacity(color, mFrame->StyleSVG()->mStroke, |
| 2762 | mFrame->StyleSVG()->mStrokeOpacity); |
| 2763 | strokePattern.InitColorPattern(ToDeviceColor(color)); |
| 2764 | } else { |
| 2765 | SVGUtils::MakeStrokePatternFor(mFrame, &mContext, &strokePattern, |
| 2766 | mImgParams, mContextPaint); |
| 2767 | } |
| 2768 | if (strokePattern.GetPattern()) { |
| 2769 | SVGElement* svgOwner = |
| 2770 | SVGElement::FromNode(mFrame->GetParent()->GetContent()); |
| 2771 | |
| 2772 | // Apply any stroke-specific transform |
| 2773 | if (Maybe<gfxMatrix> userToOuterSVG = |
| 2774 | SVGUtils::GetNonScalingStrokeTransform(mFrame)) { |
| 2775 | mContext.Multiply(userToOuterSVG->Inverse()); |
| 2776 | } |
| 2777 | |
| 2778 | RefPtr<Path> path = mContext.GetPath(); |
| 2779 | SVGContentUtils::AutoStrokeOptions strokeOptions; |
| 2780 | SVGContentUtils::GetStrokeOptions(&strokeOptions, svgOwner, mFrame->Style(), |
| 2781 | mContextPaint); |
| 2782 | DrawOptions drawOptions; |
| 2783 | drawOptions.mAntialiasMode = |
| 2784 | SVGUtils::ToAntialiasMode(mFrame->StyleText()->mTextRendering); |
| 2785 | mContext.GetDrawTarget()->Stroke(path, strokePattern, strokeOptions); |
| 2786 | } |
| 2787 | } |
| 2788 | |
| 2789 | // ============================================================================ |
| 2790 | // SVGTextFrame |
| 2791 | |
| 2792 | // ---------------------------------------------------------------------------- |
| 2793 | // Display list item |
| 2794 | |
| 2795 | bool DisplaySVGText::ShouldBeActive( |
| 2796 | mozilla::wr::DisplayListBuilder& aBuilder, |
| 2797 | mozilla::wr::IpcResourceUpdateQueue& aResources, |
| 2798 | const mozilla::layers::StackingContextHelper& aSc, |
| 2799 | mozilla::layers::RenderRootStateManager* aManager, |
| 2800 | nsDisplayListBuilder* aDisplayListBuilder) { |
| 2801 | auto* frame = static_cast<SVGTextFrame*>(mFrame); |
| 2802 | return frame |
| 2803 | ->CreateWebRenderCommands(aBuilder, aResources, aSc, aManager, |
| 2804 | aDisplayListBuilder, this, /*aDryRun=*/true) |
| 2805 | .isOk(); |
| 2806 | } |
| 2807 | |
| 2808 | WebRenderCommandsResult DisplaySVGText::CreateWebRenderCommands( |
| 2809 | mozilla::wr::DisplayListBuilder& aBuilder, |
| 2810 | mozilla::wr::IpcResourceUpdateQueue& aResources, |
| 2811 | const mozilla::layers::StackingContextHelper& aSc, |
| 2812 | mozilla::layers::RenderRootStateManager* aManager, |
| 2813 | nsDisplayListBuilder* aDisplayListBuilder) { |
| 2814 | auto* frame = static_cast<SVGTextFrame*>(mFrame); |
| 2815 | return frame->CreateWebRenderCommands(aBuilder, aResources, aSc, aManager, |
| 2816 | aDisplayListBuilder, this, |
| 2817 | /*aDryRun=*/false); |
| 2818 | } |
| 2819 | |
| 2820 | // --------------------------------------------------------------------- |
| 2821 | // nsQueryFrame methods |
| 2822 | |
| 2823 | NS_QUERYFRAME_HEAD(SVGTextFrame)void* SVGTextFrame ::QueryFrame(FrameIID id) const { switch ( id) { |
| 2824 | 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)); } |
| 2825 | NS_QUERYFRAME_TAIL_INHERITING(SVGDisplayContainerFrame)default: break; } return SVGDisplayContainerFrame ::QueryFrame (id); } |
| 2826 | |
| 2827 | } // namespace mozilla |
| 2828 | |
| 2829 | // --------------------------------------------------------------------- |
| 2830 | // Implementation |
| 2831 | |
| 2832 | nsIFrame* NS_NewSVGTextFrame(mozilla::PresShell* aPresShell, |
| 2833 | mozilla::ComputedStyle* aStyle) { |
| 2834 | return new (aPresShell) |
| 2835 | mozilla::SVGTextFrame(aStyle, aPresShell->GetPresContext()); |
| 2836 | } |
| 2837 | |
| 2838 | namespace mozilla { |
| 2839 | |
| 2840 | NS_IMPL_FRAMEARENA_HELPERS(SVGTextFrame)void* SVGTextFrame ::operator new(size_t sz, mozilla::PresShell * aShell) { return aShell->AllocateFrame(nsQueryFrame::SVGTextFrame_id , sz); } |
| 2841 | |
| 2842 | // --------------------------------------------------------------------- |
| 2843 | // nsIFrame methods |
| 2844 | |
| 2845 | void SVGTextFrame::Init(nsIContent* aContent, nsContainerFrame* aParent, |
| 2846 | nsIFrame* aPrevInFlow) { |
| 2847 | 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)" , "./../../../layout/svg/SVGTextFrame.cpp", 2848); MOZ_PretendNoReturn (); } } while (0) |
| 2848 | "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)" , "./../../../layout/svg/SVGTextFrame.cpp", 2848); MOZ_PretendNoReturn (); } } while (0); |
| 2849 | |
| 2850 | SVGDisplayContainerFrame::Init(aContent, aParent, aPrevInFlow); |
| 2851 | AddStateBits(aParent->GetStateBits() & NS_STATE_SVG_CLIPPATH_CHILD); |
| 2852 | |
| 2853 | mMutationObserver = new MutationObserver(this); |
| 2854 | |
| 2855 | if (HasAnyStateBits(NS_FRAME_IS_NONDISPLAY)) { |
| 2856 | // We're inserting a new <text> element into a non-display context. |
| 2857 | // Ensure that we get reflowed. |
| 2858 | ScheduleReflowSVGNonDisplayText( |
| 2859 | IntrinsicDirty::FrameAncestorsAndDescendants); |
| 2860 | } |
| 2861 | } |
| 2862 | |
| 2863 | void SVGTextFrame::BuildDisplayList(nsDisplayListBuilder* aBuilder, |
| 2864 | const nsDisplayListSet& aLists) { |
| 2865 | if (IsSubtreeDirty()) { |
| 2866 | // We can sometimes be asked to paint before reflow happens and we |
| 2867 | // have updated mPositions, etc. In this case, we just avoid |
| 2868 | // painting. |
| 2869 | return; |
| 2870 | } |
| 2871 | if (!IsVisibleForPainting() && aBuilder->IsForPainting()) { |
| 2872 | return; |
| 2873 | } |
| 2874 | DisplayOutline(aBuilder, aLists); |
| 2875 | aLists.Content()->AppendNewToTop<DisplaySVGText>(aBuilder, this); |
| 2876 | } |
| 2877 | |
| 2878 | void SVGTextFrame::DidSetComputedStyle(ComputedStyle* aOldComputedStyle) { |
| 2879 | SVGDisplayContainerFrame::DidSetComputedStyle(aOldComputedStyle); |
| 2880 | if (StyleSVGReset()->HasNonScalingStroke() && |
| 2881 | (!aOldComputedStyle || |
| 2882 | !aOldComputedStyle->StyleSVGReset()->HasNonScalingStroke())) { |
| 2883 | SVGUtils::UpdateNonScalingStrokeStateBit(this); |
| 2884 | } |
| 2885 | } |
| 2886 | |
| 2887 | nsresult SVGTextFrame::AttributeChanged(int32_t aNameSpaceID, |
| 2888 | nsAtom* aAttribute, AttrModType) { |
| 2889 | if (aNameSpaceID != kNameSpaceID_None) { |
| 2890 | return NS_OK; |
| 2891 | } |
| 2892 | |
| 2893 | if (aAttribute == nsGkAtoms::transform) { |
| 2894 | // We don't invalidate for transform changes (the layers code does that). |
| 2895 | // Also note that SVGTransformableElement::GetAttributeChangeHint will |
| 2896 | // return nsChangeHint_UpdateOverflow for "transform" attribute changes |
| 2897 | // and cause DoApplyRenderingChangeToTree to make the SchedulePaint call. |
| 2898 | |
| 2899 | if (!HasAnyStateBits(NS_FRAME_FIRST_REFLOW) && mCanvasTM && |
| 2900 | mCanvasTM->IsSingular()) { |
| 2901 | // We won't have calculated the glyph positions correctly. |
| 2902 | NotifyGlyphMetricsChange(false); |
| 2903 | } |
| 2904 | mCanvasTM = nullptr; |
| 2905 | } else if (IsGlyphPositioningAttribute(aAttribute) || |
| 2906 | aAttribute == nsGkAtoms::textLength || |
| 2907 | aAttribute == nsGkAtoms::lengthAdjust) { |
| 2908 | NotifyGlyphMetricsChange(false); |
| 2909 | } |
| 2910 | |
| 2911 | return NS_OK; |
| 2912 | } |
| 2913 | |
| 2914 | void SVGTextFrame::ReflowSVGNonDisplayText() { |
| 2915 | 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" ")", "./../../../layout/svg/SVGTextFrame.cpp" , 2917); AnnotateMozCrashReason("MOZ_ASSERT" "(" "SVGUtils::AnyOuterSVGIsCallingReflowSVG(this)" ") (" "only call ReflowSVGNonDisplayText when an outer SVG frame is " "under ReflowSVG" ")"); do { MOZ_CrashSequence(__null, 2917) ; __attribute__((nomerge)) ::abort(); } while (false); } } while (false) |
| 2916 | "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" ")", "./../../../layout/svg/SVGTextFrame.cpp" , 2917); AnnotateMozCrashReason("MOZ_ASSERT" "(" "SVGUtils::AnyOuterSVGIsCallingReflowSVG(this)" ") (" "only call ReflowSVGNonDisplayText when an outer SVG frame is " "under ReflowSVG" ")"); do { MOZ_CrashSequence(__null, 2917) ; __attribute__((nomerge)) ::abort(); } while (false); } } while (false) |
| 2917 | "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" ")", "./../../../layout/svg/SVGTextFrame.cpp" , 2917); AnnotateMozCrashReason("MOZ_ASSERT" "(" "SVGUtils::AnyOuterSVGIsCallingReflowSVG(this)" ") (" "only call ReflowSVGNonDisplayText when an outer SVG frame is " "under ReflowSVG" ")"); do { MOZ_CrashSequence(__null, 2917) ; __attribute__((nomerge)) ::abort(); } while (false); } } while (false); |
| 2918 | 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" ")", "./../../../layout/svg/SVGTextFrame.cpp", 2920); AnnotateMozCrashReason ("MOZ_ASSERT" "(" "HasAnyStateBits(NS_FRAME_IS_NONDISPLAY)" ") (" "only call ReflowSVGNonDisplayText if the frame is " "NS_FRAME_IS_NONDISPLAY" ")"); do { MOZ_CrashSequence(__null, 2920); __attribute__((nomerge )) ::abort(); } while (false); } } while (false) |
| 2919 | "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" ")", "./../../../layout/svg/SVGTextFrame.cpp", 2920); AnnotateMozCrashReason ("MOZ_ASSERT" "(" "HasAnyStateBits(NS_FRAME_IS_NONDISPLAY)" ") (" "only call ReflowSVGNonDisplayText if the frame is " "NS_FRAME_IS_NONDISPLAY" ")"); do { MOZ_CrashSequence(__null, 2920); __attribute__((nomerge )) ::abort(); } while (false); } } while (false) |
| 2920 | "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" ")", "./../../../layout/svg/SVGTextFrame.cpp", 2920); AnnotateMozCrashReason ("MOZ_ASSERT" "(" "HasAnyStateBits(NS_FRAME_IS_NONDISPLAY)" ") (" "only call ReflowSVGNonDisplayText if the frame is " "NS_FRAME_IS_NONDISPLAY" ")"); do { MOZ_CrashSequence(__null, 2920); __attribute__((nomerge )) ::abort(); } while (false); } } while (false); |
| 2921 | |
| 2922 | // We had a style change, so we mark this frame as dirty so that the next |
| 2923 | // time it is painted, we reflow the anonymous block frame. |
| 2924 | MarkSubtreeDirty(); |
| 2925 | |
| 2926 | // Finally, we need to actually reflow the anonymous block frame and update |
| 2927 | // mPositions, in case we are being reflowed immediately after a DOM |
| 2928 | // mutation that needs frame reconstruction. |
| 2929 | MaybeReflowAnonymousBlockChild(); |
| 2930 | UpdateGlyphPositioning(); |
| 2931 | } |
| 2932 | |
| 2933 | void SVGTextFrame::ScheduleReflowSVGNonDisplayText(IntrinsicDirty aReason) { |
| 2934 | 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" ")", "./../../../layout/svg/SVGTextFrame.cpp" , 2936); AnnotateMozCrashReason("MOZ_ASSERT" "(" "!SVGUtils::OuterSVGIsCallingReflowSVG(this)" ") (" "do not call ScheduleReflowSVGNonDisplayText when the outer SVG " "frame is under ReflowSVG" ")"); do { MOZ_CrashSequence(__null , 2936); __attribute__((nomerge)) ::abort(); } while (false); } } while (false) |
| 2935 | "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" ")", "./../../../layout/svg/SVGTextFrame.cpp" , 2936); AnnotateMozCrashReason("MOZ_ASSERT" "(" "!SVGUtils::OuterSVGIsCallingReflowSVG(this)" ") (" "do not call ScheduleReflowSVGNonDisplayText when the outer SVG " "frame is under ReflowSVG" ")"); do { MOZ_CrashSequence(__null , 2936); __attribute__((nomerge)) ::abort(); } while (false); } } while (false) |
| 2936 | "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" ")", "./../../../layout/svg/SVGTextFrame.cpp" , 2936); AnnotateMozCrashReason("MOZ_ASSERT" "(" "!SVGUtils::OuterSVGIsCallingReflowSVG(this)" ") (" "do not call ScheduleReflowSVGNonDisplayText when the outer SVG " "frame is under ReflowSVG" ")"); do { MOZ_CrashSequence(__null , 2936); __attribute__((nomerge)) ::abort(); } while (false); } } while (false); |
| 2937 | 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" ")", "./../../../layout/svg/SVGTextFrame.cpp" , 2939); AnnotateMozCrashReason("MOZ_ASSERT" "(" "!HasAnyStateBits(NS_STATE_SVG_TEXT_IN_REFLOW)" ") (" "do not call ScheduleReflowSVGNonDisplayText while reflowing the " "anonymous block child" ")"); do { MOZ_CrashSequence(__null, 2939); __attribute__((nomerge)) ::abort(); } while (false); } } while (false) |
| 2938 | "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" ")", "./../../../layout/svg/SVGTextFrame.cpp" , 2939); AnnotateMozCrashReason("MOZ_ASSERT" "(" "!HasAnyStateBits(NS_STATE_SVG_TEXT_IN_REFLOW)" ") (" "do not call ScheduleReflowSVGNonDisplayText while reflowing the " "anonymous block child" ")"); do { MOZ_CrashSequence(__null, 2939); __attribute__((nomerge)) ::abort(); } while (false); } } while (false) |
| 2939 | "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" ")", "./../../../layout/svg/SVGTextFrame.cpp" , 2939); AnnotateMozCrashReason("MOZ_ASSERT" "(" "!HasAnyStateBits(NS_STATE_SVG_TEXT_IN_REFLOW)" ") (" "do not call ScheduleReflowSVGNonDisplayText while reflowing the " "anonymous block child" ")"); do { MOZ_CrashSequence(__null, 2939); __attribute__((nomerge)) ::abort(); } while (false); } } while (false); |
| 2940 | |
| 2941 | // We need to find an ancestor frame that we can call FrameNeedsReflow |
| 2942 | // on that will cause the document to be marked as needing relayout, |
| 2943 | // and for that ancestor (or some further ancestor) to be marked as |
| 2944 | // a root to reflow. We choose the closest ancestor frame that is not |
| 2945 | // NS_FRAME_IS_NONDISPLAY and which is either an outer SVG frame or a |
| 2946 | // non-SVG frame. (We don't consider displayed SVG frame ancestors other |
| 2947 | // than SVGOuterSVGFrame, since calling FrameNeedsReflow on those other |
| 2948 | // SVG frames would do a bunch of unnecessary work on the SVG frames up to |
| 2949 | // the SVGOuterSVGFrame.) |
| 2950 | |
| 2951 | nsIFrame* f = this; |
| 2952 | while (f) { |
| 2953 | if (!f->HasAnyStateBits(NS_FRAME_IS_NONDISPLAY)) { |
| 2954 | if (f->IsSubtreeDirty()) { |
| 2955 | // This is a displayed frame, so if it is already dirty, we will be |
| 2956 | // reflowed soon anyway. No need to call FrameNeedsReflow again, then. |
| 2957 | return; |
| 2958 | } |
| 2959 | if (!f->HasAnyStateBits(NS_FRAME_SVG_LAYOUT)) { |
| 2960 | break; |
| 2961 | } |
| 2962 | f->AddStateBits(NS_FRAME_HAS_DIRTY_CHILDREN); |
| 2963 | } |
| 2964 | f = f->GetParent(); |
| 2965 | } |
| 2966 | |
| 2967 | 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" ")" , "./../../../layout/svg/SVGTextFrame.cpp", 2967); AnnotateMozCrashReason ("MOZ_ASSERT" "(" "f" ") (" "should have found an ancestor frame to reflow" ")"); do { MOZ_CrashSequence(__null, 2967); __attribute__((nomerge )) ::abort(); } while (false); } } while (false); |
| 2968 | |
| 2969 | PresShell()->FrameNeedsReflow(f, aReason, NS_FRAME_IS_DIRTY); |
| 2970 | } |
| 2971 | |
| 2972 | 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" ")", "./../../../layout/svg/SVGTextFrame.cpp" , 2972); AnnotateMozCrashReason("MOZ_ASSERT" "(" "int32_t(mRefCnt) >= 0" ") (" "illegal refcnt" ")"); do { MOZ_CrashSequence(__null, 2972 ); __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" ")", "./../../../layout/svg/SVGTextFrame.cpp" , 2972); AnnotateMozCrashReason("MOZ_ASSERT" "(" "\"SVGTextFrame::MutationObserver\" != nullptr" ") (" "Must specify a name" ")"); do { MOZ_CrashSequence(__null , 2972); __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" ")", "./../../../layout/svg/SVGTextFrame.cpp" , 2972); AnnotateMozCrashReason("MOZ_ASSERT" "(" "int32_t(mRefCnt) > 0" ") (" "dup release" ")"); do { MOZ_CrashSequence(__null, 2972 ); __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" ")", "./../../../layout/svg/SVGTextFrame.cpp" , 2972); AnnotateMozCrashReason("MOZ_ASSERT" "(" "\"SVGTextFrame::MutationObserver\" != nullptr" ") (" "Must specify a name" ")"); do { MOZ_CrashSequence(__null , 2972); __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" , "./../../../layout/svg/SVGTextFrame.cpp", 2972); 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(std::size(table) > 1, "need at least 1 interface" ); rv = NS_TableDrivenQI(static_cast<void*>(this), aIID , aInstancePtr, table); return rv; } |
| 2973 | |
| 2974 | void SVGTextFrame::MutationObserver::ContentAppended( |
| 2975 | nsIContent* aFirstNewContent, const ContentAppendInfo&) { |
| 2976 | mFrame->NotifyGlyphMetricsChange(true); |
| 2977 | } |
| 2978 | |
| 2979 | void SVGTextFrame::MutationObserver::ContentInserted(nsIContent* aChild, |
| 2980 | const ContentInsertInfo&) { |
| 2981 | mFrame->NotifyGlyphMetricsChange(true); |
| 2982 | } |
| 2983 | |
| 2984 | void SVGTextFrame::MutationObserver::ContentWillBeRemoved( |
| 2985 | nsIContent* aChild, const ContentRemoveInfo& aInfo) { |
| 2986 | if (aInfo.mBatchRemovalState && !aInfo.mBatchRemovalState->mIsFirst) { |
| 2987 | return; |
| 2988 | } |
| 2989 | mFrame->NotifyGlyphMetricsChange(true); |
| 2990 | } |
| 2991 | |
| 2992 | void SVGTextFrame::MutationObserver::CharacterDataChanged( |
| 2993 | nsIContent* aContent, const CharacterDataChangeInfo&) { |
| 2994 | mFrame->NotifyGlyphMetricsChange(true); |
| 2995 | } |
| 2996 | |
| 2997 | void SVGTextFrame::MutationObserver::AttributeChanged( |
| 2998 | Element* aElement, int32_t aNameSpaceID, nsAtom* aAttribute, AttrModType, |
| 2999 | const nsAttrValue* aOldValue) { |
| 3000 | if (!aElement->IsSVGElement()) { |
| 3001 | return; |
| 3002 | } |
| 3003 | |
| 3004 | // Attribute changes on this element will be handled by |
| 3005 | // SVGTextFrame::AttributeChanged. |
| 3006 | if (aElement == mFrame->GetContent()) { |
| 3007 | return; |
| 3008 | } |
| 3009 | |
| 3010 | mFrame->HandleAttributeChangeInDescendant(aElement, aNameSpaceID, aAttribute); |
| 3011 | } |
| 3012 | |
| 3013 | void SVGTextFrame::HandleAttributeChangeInDescendant(Element* aElement, |
| 3014 | int32_t aNameSpaceID, |
| 3015 | nsAtom* aAttribute) { |
| 3016 | if (aElement->IsSVGElement(nsGkAtoms::textPath)) { |
| 3017 | if (aNameSpaceID == kNameSpaceID_None && |
| 3018 | (aAttribute == nsGkAtoms::startOffset || |
| 3019 | aAttribute == nsGkAtoms::path || aAttribute == nsGkAtoms::side)) { |
| 3020 | NotifyGlyphMetricsChange(false); |
| 3021 | } else if ((aNameSpaceID == kNameSpaceID_XLink4 || |
| 3022 | aNameSpaceID == kNameSpaceID_None) && |
| 3023 | aAttribute == nsGkAtoms::href) { |
| 3024 | // Blow away our reference, if any |
| 3025 | nsIFrame* childElementFrame = aElement->GetPrimaryFrame(); |
| 3026 | if (childElementFrame) { |
| 3027 | SVGObserverUtils::RemoveTextPathObserver(childElementFrame); |
| 3028 | NotifyGlyphMetricsChange(false); |
| 3029 | } |
| 3030 | } |
| 3031 | } else { |
| 3032 | if (aNameSpaceID == kNameSpaceID_None && |
| 3033 | IsGlyphPositioningAttribute(aAttribute)) { |
| 3034 | NotifyGlyphMetricsChange(false); |
| 3035 | } |
| 3036 | } |
| 3037 | } |
| 3038 | |
| 3039 | void SVGTextFrame::FindCloserFrameForSelection( |
| 3040 | const nsPoint& aPoint, FrameWithDistance* aCurrentBestFrame) { |
| 3041 | if (HasAnyStateBits(NS_FRAME_IS_NONDISPLAY)) { |
| 3042 | return; |
| 3043 | } |
| 3044 | |
| 3045 | UpdateGlyphPositioning(); |
| 3046 | |
| 3047 | nsPresContext* presContext = PresContext(); |
| 3048 | |
| 3049 | // Find the frame that has the closest rendered run rect to aPoint. |
| 3050 | TextRenderedRunIterator it(this); |
| 3051 | for (TextRenderedRun run = it.Current(); run.mFrame; run = it.Next()) { |
| 3052 | TextRenderedRun::GeometryFlags flags( |
| 3053 | TextRenderedRun::GeometryFlag::IncludeFill, |
| 3054 | TextRenderedRun::GeometryFlag::IncludeStroke, |
| 3055 | TextRenderedRun::GeometryFlag::NoHorizontalOverflow); |
| 3056 | SVGBBox userRect = run.GetUserSpaceRect(presContext, flags); |
| 3057 | float devPxPerCSSPx = presContext->CSSPixelsToDevPixels(1.f); |
| 3058 | userRect.Scale(devPxPerCSSPx); |
| 3059 | |
| 3060 | if (!userRect.IsEmpty()) { |
| 3061 | gfxMatrix m; |
| 3062 | nsRect rect = |
| 3063 | SVGUtils::ToCanvasBounds(userRect.ToThebesRect(), m, presContext); |
| 3064 | |
| 3065 | if (nsLayoutUtils::PointIsCloserToRect(aPoint, rect, |
| 3066 | aCurrentBestFrame->mXDistance, |
| 3067 | aCurrentBestFrame->mYDistance)) { |
| 3068 | aCurrentBestFrame->mFrame = run.mFrame; |
| 3069 | } |
| 3070 | } |
| 3071 | } |
| 3072 | } |
| 3073 | |
| 3074 | //---------------------------------------------------------------------- |
| 3075 | // ISVGDisplayableFrame methods |
| 3076 | |
| 3077 | void SVGTextFrame::NotifySVGChanged(ChangeFlags aFlags) { |
| 3078 | MOZ_ASSERT(aFlags.contains(ChangeFlag::TransformChanged) ||do { static_assert( mozilla::detail::AssertionConditionType< decltype(aFlags.contains(ChangeFlag::TransformChanged) || aFlags .contains(ChangeFlag::CoordContextChanged))>::isValid, "invalid assertion condition" ); if ((__builtin_expect(!!(!(!!(aFlags.contains(ChangeFlag:: TransformChanged) || aFlags.contains(ChangeFlag::CoordContextChanged )))), 0))) { do { } while (false); MOZ_ReportAssertionFailure ("aFlags.contains(ChangeFlag::TransformChanged) || aFlags.contains(ChangeFlag::CoordContextChanged)" " (" "Invalidation logic may need adjusting" ")", "./../../../layout/svg/SVGTextFrame.cpp" , 3080); AnnotateMozCrashReason("MOZ_ASSERT" "(" "aFlags.contains(ChangeFlag::TransformChanged) || aFlags.contains(ChangeFlag::CoordContextChanged)" ") (" "Invalidation logic may need adjusting" ")"); do { MOZ_CrashSequence (__null, 3080); __attribute__((nomerge)) ::abort(); } while ( false); } } while (false) |
| 3079 | aFlags.contains(ChangeFlag::CoordContextChanged),do { static_assert( mozilla::detail::AssertionConditionType< decltype(aFlags.contains(ChangeFlag::TransformChanged) || aFlags .contains(ChangeFlag::CoordContextChanged))>::isValid, "invalid assertion condition" ); if ((__builtin_expect(!!(!(!!(aFlags.contains(ChangeFlag:: TransformChanged) || aFlags.contains(ChangeFlag::CoordContextChanged )))), 0))) { do { } while (false); MOZ_ReportAssertionFailure ("aFlags.contains(ChangeFlag::TransformChanged) || aFlags.contains(ChangeFlag::CoordContextChanged)" " (" "Invalidation logic may need adjusting" ")", "./../../../layout/svg/SVGTextFrame.cpp" , 3080); AnnotateMozCrashReason("MOZ_ASSERT" "(" "aFlags.contains(ChangeFlag::TransformChanged) || aFlags.contains(ChangeFlag::CoordContextChanged)" ") (" "Invalidation logic may need adjusting" ")"); do { MOZ_CrashSequence (__null, 3080); __attribute__((nomerge)) ::abort(); } while ( false); } } while (false) |
| 3080 | "Invalidation logic may need adjusting")do { static_assert( mozilla::detail::AssertionConditionType< decltype(aFlags.contains(ChangeFlag::TransformChanged) || aFlags .contains(ChangeFlag::CoordContextChanged))>::isValid, "invalid assertion condition" ); if ((__builtin_expect(!!(!(!!(aFlags.contains(ChangeFlag:: TransformChanged) || aFlags.contains(ChangeFlag::CoordContextChanged )))), 0))) { do { } while (false); MOZ_ReportAssertionFailure ("aFlags.contains(ChangeFlag::TransformChanged) || aFlags.contains(ChangeFlag::CoordContextChanged)" " (" "Invalidation logic may need adjusting" ")", "./../../../layout/svg/SVGTextFrame.cpp" , 3080); AnnotateMozCrashReason("MOZ_ASSERT" "(" "aFlags.contains(ChangeFlag::TransformChanged) || aFlags.contains(ChangeFlag::CoordContextChanged)" ") (" "Invalidation logic may need adjusting" ")"); do { MOZ_CrashSequence (__null, 3080); __attribute__((nomerge)) ::abort(); } while ( false); } } while (false); |
| 3081 | |
| 3082 | bool needNewBounds = false; |
| 3083 | bool needGlyphMetricsUpdate = false; |
| 3084 | if (aFlags.contains(ChangeFlag::CoordContextChanged)) { |
| 3085 | if (HasAnyStateBits(NS_STATE_SVG_POSITIONING_MAY_USE_PERCENTAGES)) { |
| 3086 | needGlyphMetricsUpdate = true; |
| 3087 | } |
| 3088 | if (SVGContentUtils::HasPercentageDependentStroke( |
| 3089 | Style(), SVGContextPaint::GetContextPaint(GetContent())) || |
| 3090 | SVGIntegrationUtils::UsingEffectsForFrame(this)) { |
| 3091 | // Stroke and effects may have percentage dependent units. |
| 3092 | needNewBounds = true; |
| 3093 | } |
| 3094 | } |
| 3095 | |
| 3096 | if (aFlags.contains(ChangeFlag::TransformChanged)) { |
| 3097 | if (mCanvasTM && mCanvasTM->IsSingular()) { |
| 3098 | // We won't have calculated the glyph positions correctly. |
| 3099 | needNewBounds = true; |
| 3100 | needGlyphMetricsUpdate = true; |
| 3101 | } |
| 3102 | mCanvasTM = nullptr; |
| 3103 | if (StyleSVGReset()->HasNonScalingStroke()) { |
| 3104 | // Stroke currently contributes to our mRect, and our stroke depends on |
| 3105 | // the transform to our outer-<svg> if |vector-effect:non-scaling-stroke|. |
| 3106 | needNewBounds = true; |
| 3107 | } |
| 3108 | |
| 3109 | // If the scale at which we computed our mFontSizeScaleFactor has changed by |
| 3110 | // at least a factor of two, reflow the text. This avoids reflowing text at |
| 3111 | // every tick of a transform animation, but ensures our glyph metrics |
| 3112 | // do not get too far out of sync with the final font size on the screen. |
| 3113 | const float scale = GetContextScale(this); |
| 3114 | if (scale != mLastContextScale) { |
| 3115 | if (mLastContextScale == 0.0f) { |
| 3116 | needNewBounds = true; |
| 3117 | needGlyphMetricsUpdate = true; |
| 3118 | } else { |
| 3119 | float change = scale / mLastContextScale; |
| 3120 | if (change >= 2.0f || change <= 0.5f) { |
| 3121 | needNewBounds = true; |
| 3122 | needGlyphMetricsUpdate = true; |
| 3123 | } |
| 3124 | } |
| 3125 | } |
| 3126 | } |
| 3127 | |
| 3128 | if (needNewBounds) { |
| 3129 | // Ancestor changes can't affect how we render from the perspective of |
| 3130 | // any rendering observers that we may have, so we don't need to |
| 3131 | // invalidate them. We also don't need to invalidate ourself, since our |
| 3132 | // changed ancestor will have invalidated its entire area, which includes |
| 3133 | // our area. |
| 3134 | ScheduleReflowSVG(); |
| 3135 | } |
| 3136 | |
| 3137 | if (needGlyphMetricsUpdate) { |
| 3138 | // If we are positioned using percentage values we need to update our |
| 3139 | // position whenever our viewport's dimensions change. But only do this if |
| 3140 | // we have been reflowed once, otherwise the glyph positioning will be |
| 3141 | // wrong. (We need to wait until bidi reordering has been done.) |
| 3142 | if (!HasAnyStateBits(NS_FRAME_FIRST_REFLOW)) { |
| 3143 | NotifyGlyphMetricsChange(false); |
| 3144 | } |
| 3145 | } |
| 3146 | } |
| 3147 | |
| 3148 | /** |
| 3149 | * Gets the offset into a DOM node that the specified caret is positioned at. |
| 3150 | */ |
| 3151 | static int32_t GetCaretOffset(nsCaret* aCaret) { |
| 3152 | RefPtr<Selection> selection = aCaret->GetSelection(); |
| 3153 | if (!selection) { |
| 3154 | return -1; |
| 3155 | } |
| 3156 | |
| 3157 | return selection->AnchorOffset(); |
| 3158 | } |
| 3159 | |
| 3160 | /** |
| 3161 | * Returns whether the caret should be painted for a given TextRenderedRun |
| 3162 | * by checking whether the caret is in the range covered by the rendered run. |
| 3163 | * |
| 3164 | * @param aThisRun The TextRenderedRun to be painted. |
| 3165 | * @param aCaret The caret. |
| 3166 | */ |
| 3167 | static bool ShouldPaintCaret(const TextRenderedRun& aThisRun, nsCaret* aCaret) { |
| 3168 | int32_t caretOffset = GetCaretOffset(aCaret); |
| 3169 | |
| 3170 | if (caretOffset < 0) { |
| 3171 | return false; |
| 3172 | } |
| 3173 | |
| 3174 | return uint32_t(caretOffset) >= aThisRun.mTextFrameContentOffset && |
| 3175 | uint32_t(caretOffset) < aThisRun.mTextFrameContentOffset + |
| 3176 | aThisRun.mTextFrameContentLength; |
| 3177 | } |
| 3178 | |
| 3179 | void SVGTextFrame::PaintSVG(gfxContext& aContext, const gfxMatrix& aTransform, |
| 3180 | imgDrawingParams& aImgParams) { |
| 3181 | DrawTarget& aDrawTarget = *aContext.GetDrawTarget(); |
| 3182 | nsIFrame* kid = PrincipalChildList().FirstChild(); |
| 3183 | if (!kid) { |
| 3184 | return; |
| 3185 | } |
| 3186 | |
| 3187 | if (IsSubtreeDirty()) { |
| 3188 | return; |
| 3189 | } |
| 3190 | |
| 3191 | if (HasAnyStateBits(NS_FRAME_IS_NONDISPLAY)) { |
| 3192 | // Text frames inside <clipPath>, <mask>, etc. will never have had |
| 3193 | // ReflowSVG called on them, so call UpdateGlyphPositioning to do this now. |
| 3194 | UpdateGlyphPositioning(); |
| 3195 | } |
| 3196 | |
| 3197 | const float epsilon = 0.0001; |
| 3198 | if (std::abs(mLengthAdjustScaleFactor) < epsilon) { |
| 3199 | // A zero scale factor can be caused by having forced the text length to |
| 3200 | // zero. In this situation there is nothing to show. |
| 3201 | return; |
| 3202 | } |
| 3203 | |
| 3204 | if (aTransform.IsSingular()) { |
| 3205 | NS_WARNING("Can't render text element!")NS_DebugBreak(NS_DEBUG_WARNING, "Can't render text element!", nullptr, "./../../../layout/svg/SVGTextFrame.cpp", 3205); |
| 3206 | return; |
| 3207 | } |
| 3208 | |
| 3209 | gfxMatrix initialMatrix = aContext.CurrentMatrixDouble(); |
| 3210 | |
| 3211 | gfxMatrix matrixForPaintServers = aTransform * initialMatrix; |
| 3212 | |
| 3213 | // SVG frames' PaintSVG methods paint in CSS px, but normally frames paint in |
| 3214 | // dev pixels. Here we multiply a CSS-px-to-dev-pixel factor onto aTransform |
| 3215 | // so our non-SVG nsTextFrame children paint correctly. |
| 3216 | nsPresContext* presContext = PresContext(); |
| 3217 | auto auPerDevPx = presContext->AppUnitsPerDevPixel(); |
| 3218 | float cssPxPerDevPx = nsPresContext::AppUnitsToFloatCSSPixels(auPerDevPx); |
| 3219 | gfxMatrix canvasTMForChildren = aTransform; |
| 3220 | canvasTMForChildren.PreScale(cssPxPerDevPx, cssPxPerDevPx); |
| 3221 | initialMatrix.PreScale(1 / cssPxPerDevPx, 1 / cssPxPerDevPx); |
| 3222 | |
| 3223 | gfxContextMatrixAutoSaveRestore matSR(&aContext); |
| 3224 | aContext.NewPath(); |
| 3225 | aContext.Multiply(canvasTMForChildren); |
| 3226 | gfxMatrix currentMatrix = aContext.CurrentMatrixDouble(); |
| 3227 | |
| 3228 | RefPtr<nsCaret> caret = presContext->PresShell()->GetActiveCaret(); |
| 3229 | nsIFrame* caretFrame = caret->GetPaintGeometry(); |
| 3230 | |
| 3231 | gfxContextAutoSaveRestore ctxSR; |
| 3232 | TextRenderedRunIterator it( |
| 3233 | this, TextRenderedRunIterator::RenderedRunFilter::VisibleFrames); |
| 3234 | TextRenderedRun run = it.Current(); |
| 3235 | |
| 3236 | SVGContextPaint* outerContextPaint = |
| 3237 | SVGContextPaint::GetContextPaint(GetContent()); |
| 3238 | |
| 3239 | while (run.mFrame) { |
| 3240 | nsTextFrame* frame = run.mFrame; |
| 3241 | |
| 3242 | auto contextPaint = MakeRefPtr<SVGContextPaint>( |
| 3243 | &aDrawTarget, initialMatrix, frame, outerContextPaint, aImgParams); |
| 3244 | DrawMode drawMode = contextPaint->GetDrawMode(); |
| 3245 | if (drawMode & DrawMode::GLYPH_STROKE) { |
| 3246 | ctxSR.EnsureSaved(&aContext); |
| 3247 | // This may change the gfxContext's transform (for non-scaling stroke), |
| 3248 | // in which case this needs to happen before we call SetMatrix() below. |
| 3249 | SVGUtils::SetupStrokeGeometry(frame->GetParent(), &aContext, |
| 3250 | outerContextPaint); |
| 3251 | } |
| 3252 | |
| 3253 | nscoord startEdge, endEdge; |
| 3254 | run.GetClipEdges(startEdge, endEdge); |
| 3255 | |
| 3256 | // Set up the transform for painting the text frame for the substring |
| 3257 | // indicated by the run. |
| 3258 | gfxMatrix runTransform = run.GetTransformFromUserSpaceForPainting( |
| 3259 | presContext, startEdge, endEdge) * |
| 3260 | currentMatrix; |
| 3261 | aContext.SetMatrixDouble(runTransform); |
| 3262 | |
| 3263 | if (drawMode != DrawMode(0)) { |
| 3264 | bool paintSVGGlyphs; |
| 3265 | nsTextFrame::PaintTextParams params(&aContext); |
| 3266 | params.framePt = Point(); |
| 3267 | params.dirtyRect = |
| 3268 | LayoutDevicePixel::FromAppUnits(frame->InkOverflowRect(), auPerDevPx); |
| 3269 | params.contextPaint = contextPaint; |
| 3270 | bool isSelected; |
| 3271 | if (HasAnyStateBits(NS_STATE_SVG_CLIPPATH_CHILD)) { |
| 3272 | params.state = nsTextFrame::PaintTextParams::GenerateTextMask; |
| 3273 | isSelected = false; |
| 3274 | } else { |
| 3275 | isSelected = frame->IsSelected(); |
| 3276 | } |
| 3277 | gfxGroupForBlendAutoSaveRestore autoGroupForBlend(&aContext); |
| 3278 | float opacity = 1.0f; |
| 3279 | nsIFrame* ancestor = frame->GetParent(); |
| 3280 | while (ancestor != this) { |
| 3281 | opacity *= ancestor->StyleEffects()->mOpacity; |
| 3282 | ancestor = ancestor->GetParent(); |
| 3283 | } |
| 3284 | if (opacity < 1.0f) { |
| 3285 | autoGroupForBlend.PushGroupForBlendBack(gfxContentType::COLOR_ALPHA, |
| 3286 | opacity); |
| 3287 | } |
| 3288 | |
| 3289 | if (ShouldRenderAsPath(frame, outerContextPaint, paintSVGGlyphs)) { |
| 3290 | SVGTextDrawPathCallbacks callbacks(this, outerContextPaint, aContext, |
| 3291 | frame, matrixForPaintServers, |
| 3292 | aImgParams, paintSVGGlyphs); |
| 3293 | params.callbacks = &callbacks; |
| 3294 | frame->PaintText(params, startEdge, endEdge, nsPoint(), isSelected, |
| 3295 | aImgParams); |
| 3296 | } else { |
| 3297 | frame->PaintText(params, startEdge, endEdge, nsPoint(), isSelected, |
| 3298 | aImgParams); |
| 3299 | } |
| 3300 | } |
| 3301 | |
| 3302 | if (frame == caretFrame && ShouldPaintCaret(run, caret)) { |
| 3303 | // XXX Should we be looking at the fill/stroke colours to paint the |
| 3304 | // caret with, rather than using the color property? |
| 3305 | caret->PaintCaret(aDrawTarget, frame, nsPoint()); |
| 3306 | aContext.NewPath(); |
| 3307 | } |
| 3308 | |
| 3309 | run = it.Next(); |
| 3310 | } |
| 3311 | } |
| 3312 | |
| 3313 | WebRenderCommandsResult SVGTextFrame::CreateWebRenderCommands( |
| 3314 | wr::DisplayListBuilder& aBuilder, wr::IpcResourceUpdateQueue& aResources, |
| 3315 | const layers::StackingContextHelper& aSc, |
| 3316 | layers::RenderRootStateManager* aManager, |
| 3317 | nsDisplayListBuilder* aDisplayListBuilder, DisplaySVGText* aItem, |
| 3318 | bool aDryRun) { |
| 3319 | if (!StaticPrefs::gfx_webrender_svg_text()) { |
| 3320 | return Err("WebRender SVG text is disabled"); |
| 3321 | } |
| 3322 | if (!PrincipalChildList().FirstChild() || IsSubtreeDirty()) { |
| 3323 | return Err("text is not laid out"); |
| 3324 | } |
| 3325 | if (HasAnyStateBits(NS_FRAME_IS_NONDISPLAY | NS_STATE_SVG_CLIPPATH_CHILD)) { |
| 3326 | return Err("non-display text"); |
| 3327 | } |
| 3328 | const float epsilon = 0.0001; |
| 3329 | if (std::abs(mLengthAdjustScaleFactor) < epsilon) { |
| 3330 | return Err("zero length adjust scale"); |
| 3331 | } |
| 3332 | if (GetWritingMode().IsVertical() && |
| 3333 | std::abs(mLengthAdjustScaleFactor - 1.0f) > epsilon) { |
| 3334 | // lengthAdjust: spacingAndGlyphs scales only the inline axis, so the run |
| 3335 | // transform is a non-uniform scale. Sideways vertical glyphs reach |
| 3336 | // WebRender pre-transposed through the glyph flags, and WebRender applies |
| 3337 | // the run transform after that transpose, which puts the scale on the |
| 3338 | // glyph's cross axis. |
| 3339 | return Err("length adjust scale on vertical text"); |
| 3340 | } |
| 3341 | |
| 3342 | nsPresContext* presContext = PresContext(); |
| 3343 | const int32_t auPerDevPx = presContext->AppUnitsPerDevPixel(); |
| 3344 | |
| 3345 | // Same setup as PaintSVG: the text frames paint in device pixels, offset by |
| 3346 | // the item's position relative to the reference frame. |
| 3347 | nsPoint offset = aItem->ToReferenceFrame() - GetPosition(); |
| 3348 | gfxMatrix currentMatrix = gfxMatrix::Translation( |
| 3349 | nsLayoutUtils::PointToGfxPoint(offset, auPerDevPx)); |
| 3350 | |
| 3351 | RefPtr<nsCaret> caret = presContext->PresShell()->GetActiveCaret(); |
| 3352 | nsIFrame* caretFrame = caret->GetPaintGeometry(); |
| 3353 | |
| 3354 | SVGContextPaint* outerContextPaint = |
| 3355 | SVGContextPaint::GetContextPaint(GetContent()); |
| 3356 | |
| 3357 | // The font size WebRender rasterizes at is the CSS font size scaled by the |
| 3358 | // run transform and by the stacking context's scale. |
| 3359 | constexpr float kWebRenderFontSizeLimit = 320.0f; |
| 3360 | const gfx::MatrixScales inheritedScale = aSc.GetInheritedScale(); |
| 3361 | const float scScale = std::max(inheritedScale.xScale, inheritedScale.yScale); |
| 3362 | |
| 3363 | // First pass: static checks that do not depend on the fonts, so that the |
| 3364 | // common failure cases do not pay for a text painting pass. |
| 3365 | TextRenderedRunIterator checkIt( |
| 3366 | this, TextRenderedRunIterator::RenderedRunFilter::VisibleFrames); |
| 3367 | for (TextRenderedRun run = checkIt.Current(); run.mFrame; |
| 3368 | run = checkIt.Next()) { |
| 3369 | nsTextFrame* frame = run.mFrame; |
| 3370 | const nsStyleSVG* style = frame->StyleSVG(); |
| 3371 | |
| 3372 | if (!style->mFill.kind.IsNone() && !style->mFill.kind.IsColor()) { |
| 3373 | return Err("text fill is not a plain color"); |
| 3374 | } |
| 3375 | bool paintSVGGlyphs; |
| 3376 | if (ShouldRenderAsPath(frame, outerContextPaint, paintSVGGlyphs)) { |
| 3377 | // ShouldRenderAsPath rejects translucent fills because Skia would |
| 3378 | // double blend overlapping glyphs. WebRender text has the same behavior |
| 3379 | // as HTML text with a translucent color, which is accepted here. |
| 3380 | // Decorations are excluded: nsTextFrame paints them with the fill color |
| 3381 | // but without fill-opacity. |
| 3382 | bool onlyTranslucentFill = |
| 3383 | StaticPrefs::gfx_webrender_svg_text_fill_opacity() && |
| 3384 | style->mFill.kind.IsColor() && !style->HasStroke() && |
| 3385 | !frame->StyleText()->HasTextShadow() && |
| 3386 | !frame->Style()->HasTextDecorationLines(); |
| 3387 | if (!onlyTranslucentFill) { |
| 3388 | return Err("text is rendered as a path"); |
| 3389 | } |
| 3390 | } |
| 3391 | if (frame->StyleText()->HasTextShadow()) { |
| 3392 | return Err("text-shadow is not supported"); |
| 3393 | } |
| 3394 | if (frame->StyleText()->mTextRendering == |
| 3395 | StyleTextRendering::Geometricprecision) { |
| 3396 | return Err("text-rendering: geometricPrecision is not supported"); |
| 3397 | } |
| 3398 | if (frame == caretFrame) { |
| 3399 | return Err("caret painting is not supported"); |
| 3400 | } |
| 3401 | if (frame->IsSelected()) { |
| 3402 | return Err("selected text is not supported"); |
| 3403 | } |
| 3404 | // Opacity on <tspan> and other intermediate ancestors is applied by |
| 3405 | // grouping in the blob path, which has no WebRender equivalent here. |
| 3406 | for (nsIFrame* ancestor = frame->GetParent(); ancestor != this; |
| 3407 | ancestor = ancestor->GetParent()) { |
| 3408 | if (ancestor->StyleEffects()->mOpacity < 1.0f) { |
| 3409 | return Err("opacity on an intermediate ancestor is not supported"); |
| 3410 | } |
| 3411 | } |
| 3412 | |
| 3413 | float fontSize = frame->StyleFont()->mFont.size.ToCSSPixels(); |
| 3414 | float devPxPerCSSPx = presContext->CSSToDevPixelScale().scale; |
| 3415 | float runScale = std::max(1.0f, std::abs(run.mLengthAdjustScaleFactor)); |
| 3416 | if (fontSize * devPxPerCSSPx * runScale * scScale > |
| 3417 | kWebRenderFontSizeLimit) { |
| 3418 | return Err("font size exceeds the WebRender glyph rasterization limit"); |
| 3419 | } |
| 3420 | } |
| 3421 | |
| 3422 | // Everything from here on emits WebRender commands. They are recorded under |
| 3423 | // a save point so that a failure reported by the text drawer, or a dry run, |
| 3424 | // can discard them. |
| 3425 | aBuilder.Save(); |
| 3426 | bool ok = true; |
| 3427 | |
| 3428 | { |
| 3429 | bool snap; |
| 3430 | nsRect itemBounds = aItem->GetBounds(aDisplayListBuilder, &snap); |
| 3431 | RefPtr<layout::TextDrawTarget> textDrawer = new layout::TextDrawTarget( |
| 3432 | aBuilder, aResources, aSc, aManager, aItem, itemBounds, |
| 3433 | /* aCallerDoesSaveRestore = */ true); |
| 3434 | if (!textDrawer->IsValid()) { |
| 3435 | aBuilder.Restore(); |
| 3436 | return Err("text draw target is invalid"); |
| 3437 | } |
| 3438 | gfxContext context(textDrawer); |
| 3439 | imgDrawingParams imgParams(aDisplayListBuilder->GetImageDecodeFlags()); |
| 3440 | const float inheritedOpacity = aBuilder.GetInheritedOpacity(); |
| 3441 | |
| 3442 | // initialMatrix maps device pixels back to CSS pixels for paint servers; |
| 3443 | // only solid colors are accepted here so it only needs to be invertible. |
| 3444 | gfxMatrix initialMatrix; |
| 3445 | |
| 3446 | TextRenderedRunIterator it( |
| 3447 | this, TextRenderedRunIterator::RenderedRunFilter::VisibleFrames); |
| 3448 | for (TextRenderedRun run = it.Current(); run.mFrame && ok; |
| 3449 | run = it.Next()) { |
| 3450 | nsTextFrame* frame = run.mFrame; |
| 3451 | |
| 3452 | auto contextPaint = MakeRefPtr<SVGContextPaint>( |
| 3453 | textDrawer, initialMatrix, frame, outerContextPaint, imgParams); |
| 3454 | DrawMode drawMode = contextPaint->GetDrawMode(); |
| 3455 | if (drawMode == DrawMode(0)) { |
| 3456 | continue; |
| 3457 | } |
| 3458 | // GLYPH_STROKE can still be set here: it covers any stroke paint other |
| 3459 | // than "none", including a stroke that paints nothing because its width |
| 3460 | // or its opacity is zero. Those are the only strokes that get this far, |
| 3461 | // since ShouldRenderAsPath sends the rest down the path rendering route |
| 3462 | // which the checks above reject. nsTextFrame strokes glyphs only for |
| 3463 | // -webkit-text-stroke, so an SVG stroke is ignored below, exactly as it |
| 3464 | // is when the blob image path paints a zero width stroke. |
| 3465 | |
| 3466 | nscoord startEdge, endEdge; |
| 3467 | run.GetClipEdges(startEdge, endEdge); |
| 3468 | |
| 3469 | gfxMatrix runTransform = run.GetTransformFromUserSpaceForPainting( |
| 3470 | presContext, startEdge, endEdge) * |
| 3471 | currentMatrix; |
| 3472 | if (runTransform.IsSingular()) { |
| 3473 | continue; |
| 3474 | } |
| 3475 | |
| 3476 | // The text frame is painted at the origin of a reference frame that |
| 3477 | // carries the run transform, so glyph positions reach WebRender |
| 3478 | // untransformed and WebRender applies the scale and rotation. |
| 3479 | wr::WrTransformInfo transformInfo; |
| 3480 | transformInfo.transform = |
| 3481 | wr::ToLayoutTransform(gfx::Matrix4x4::From2D(ToMatrix(runTransform))); |
| 3482 | wr::StackingContextParams params; |
| 3483 | params.mTransformPtr = &transformInfo; |
| 3484 | params.reference_frame_kind = wr::WrReferenceFrameKind::Transform; |
| 3485 | params.clip = |
| 3486 | wr::WrStackingContextClip::ClipChain(aBuilder.CurrentClipChainId()); |
| 3487 | params.prim_flags = aItem->BackfaceIsHidden() |
| 3488 | ? wr::PrimitiveFlags{0} |
| 3489 | : wr::PrimitiveFlags::IS_BACKFACE_VISIBLE; |
| 3490 | |
| 3491 | LayoutDeviceRect runBounds = |
| 3492 | LayoutDeviceRect::FromAppUnits(frame->InkOverflowRect(), auPerDevPx); |
| 3493 | runBounds.Inflate(1); |
| 3494 | |
| 3495 | Maybe<wr::WrSpatialId> spatialId = aBuilder.PushStackingContext( |
| 3496 | params, wr::ToLayoutRect(LayoutDeviceRect()), |
| 3497 | wr::RasterSpace::Screen()); |
| 3498 | { |
| 3499 | Maybe<wr::SpaceAndClipChainHelper> spaceHelper; |
| 3500 | if (spatialId) { |
| 3501 | spaceHelper.emplace(aBuilder, *spatialId); |
| 3502 | } |
| 3503 | textDrawer->SetBounds(runBounds); |
| 3504 | context.SetMatrix(gfx::Matrix()); |
| 3505 | |
| 3506 | nsTextFrame::PaintTextParams textParams(&context); |
| 3507 | textParams.framePt = Point(); |
| 3508 | textParams.dirtyRect = runBounds; |
| 3509 | textParams.contextPaint = contextPaint; |
| 3510 | textParams.state = nsTextFrame::PaintTextParams::PaintText; |
| 3511 | frame->PaintText(textParams, startEdge, endEdge, nsPoint(), |
| 3512 | /* aIsSelected = */ false, imgParams, |
| 3513 | inheritedOpacity); |
| 3514 | textDrawer->TerminateShadows(); |
| 3515 | } |
| 3516 | aBuilder.PopStackingContext(spatialId.isSome()); |
| 3517 | } |
| 3518 | |
| 3519 | ok = !textDrawer->CheckHasUnsupportedFeatures(); |
| 3520 | } |
| 3521 | |
| 3522 | if (!ok) { |
| 3523 | aBuilder.Restore(); |
| 3524 | return Err("text drawer could not emit all glyph commands"); |
| 3525 | } |
| 3526 | if (aDryRun) { |
| 3527 | aBuilder.Restore(); |
| 3528 | return Ok(); |
| 3529 | } |
| 3530 | |
| 3531 | aBuilder.ClearSave(); |
| 3532 | return Ok(); |
| 3533 | } |
| 3534 | |
| 3535 | nsIFrame* SVGTextFrame::GetFrameForPoint(const gfxPoint& aPoint) { |
| 3536 | 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()" , "./../../../layout/svg/SVGTextFrame.cpp", 3536); MOZ_PretendNoReturn (); } } while (0); |
| 3537 | |
| 3538 | if (HasAnyStateBits(NS_FRAME_IS_NONDISPLAY)) { |
| 3539 | // Text frames inside <clipPath> will never have had ReflowSVG called on |
| 3540 | // them, so call UpdateGlyphPositioning to do this now. (Text frames |
| 3541 | // inside <mask> and other non-display containers will never need to |
| 3542 | // be hit tested.) |
| 3543 | UpdateGlyphPositioning(); |
| 3544 | } else { |
| 3545 | NS_ASSERTION(!IsSubtreeDirty(), "reflow should have happened")do { if (!(!IsSubtreeDirty())) { NS_DebugBreak(NS_DEBUG_ASSERTION , "reflow should have happened", "!IsSubtreeDirty()", "./../../../layout/svg/SVGTextFrame.cpp" , 3545); MOZ_PretendNoReturn(); } } while (0); |
| 3546 | } |
| 3547 | |
| 3548 | // Hit-testing any clip-path will typically be a lot quicker than the |
| 3549 | // hit-testing of our text frames in the loop below, so we do the former up |
| 3550 | // front to avoid unnecessarily wasting cycles on the latter. |
| 3551 | if (!SVGUtils::HitTestClip(this, aPoint)) { |
| 3552 | return nullptr; |
| 3553 | } |
| 3554 | |
| 3555 | nsPresContext* presContext = PresContext(); |
| 3556 | |
| 3557 | // Ideally we'd iterate backwards so that we can just return the first frame |
| 3558 | // that is under aPoint. In practice this will rarely matter though since it |
| 3559 | // is rare for text in/under an SVG <text> element to overlap (i.e. the first |
| 3560 | // text frame that is hit will likely be the only text frame that is hit). |
| 3561 | |
| 3562 | TextRenderedRunIterator it(this); |
| 3563 | nsIFrame* hit = nullptr; |
| 3564 | for (TextRenderedRun run = it.Current(); run.mFrame; run = it.Next()) { |
| 3565 | if (SVGUtils::GetGeometryHitTestFlags(run.mFrame).isEmpty()) { |
| 3566 | continue; |
| 3567 | } |
| 3568 | |
| 3569 | gfxMatrix m = run.GetTransformFromRunUserSpaceToUserSpace(presContext); |
| 3570 | if (!m.Invert()) { |
| 3571 | return nullptr; |
| 3572 | } |
| 3573 | |
| 3574 | gfxPoint pointInRunUserSpace = m.TransformPoint(aPoint); |
| 3575 | gfxRect frameRect = |
| 3576 | run.GetRunUserSpaceRect({TextRenderedRun::GeometryFlag::IncludeFill, |
| 3577 | TextRenderedRun::GeometryFlag::IncludeStroke}) |
| 3578 | .ToThebesRect(); |
| 3579 | |
| 3580 | if (frameRect.Contains(pointInRunUserSpace)) { |
| 3581 | hit = run.mFrame; |
| 3582 | } |
| 3583 | } |
| 3584 | return hit; |
| 3585 | } |
| 3586 | |
| 3587 | void SVGTextFrame::ReflowSVG() { |
| 3588 | 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" ")", "./../../../layout/svg/SVGTextFrame.cpp" , 3589); AnnotateMozCrashReason("MOZ_ASSERT" "(" "SVGUtils::AnyOuterSVGIsCallingReflowSVG(this)" ") (" "This call is probaby a wasteful mistake" ")"); do { MOZ_CrashSequence (__null, 3589); __attribute__((nomerge)) ::abort(); } while ( false); } } while (false) |
| 3589 | "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" ")", "./../../../layout/svg/SVGTextFrame.cpp" , 3589); AnnotateMozCrashReason("MOZ_ASSERT" "(" "SVGUtils::AnyOuterSVGIsCallingReflowSVG(this)" ") (" "This call is probaby a wasteful mistake" ")"); do { MOZ_CrashSequence (__null, 3589); __attribute__((nomerge)) ::abort(); } while ( false); } } while (false); |
| 3590 | |
| 3591 | 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" ")", "./../../../layout/svg/SVGTextFrame.cpp" , 3592); AnnotateMozCrashReason("MOZ_ASSERT" "(" "!HasAnyStateBits(NS_FRAME_IS_NONDISPLAY)" ") (" "ReflowSVG mechanism not designed for this" ")"); do { MOZ_CrashSequence(__null, 3592); __attribute__((nomerge)) :: abort(); } while (false); } } while (false) |
| 3592 | "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" ")", "./../../../layout/svg/SVGTextFrame.cpp" , 3592); AnnotateMozCrashReason("MOZ_ASSERT" "(" "!HasAnyStateBits(NS_FRAME_IS_NONDISPLAY)" ") (" "ReflowSVG mechanism not designed for this" ")"); do { MOZ_CrashSequence(__null, 3592); __attribute__((nomerge)) :: abort(); } while (false); } } while (false); |
| 3593 | |
| 3594 | if (!SVGUtils::NeedsReflowSVG(this)) { |
| 3595 | 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?" ")", "./../../../layout/svg/SVGTextFrame.cpp" , 3597); AnnotateMozCrashReason("MOZ_ASSERT" "(" "!HasAnyStateBits(NS_STATE_SVG_TEXT_CORRESPONDENCE_DIRTY | NS_STATE_SVG_POSITIONING_DIRTY)" ") (" "How did this happen?" ")"); do { MOZ_CrashSequence(__null , 3597); __attribute__((nomerge)) ::abort(); } while (false); } } while (false) |
| 3596 | 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?" ")", "./../../../layout/svg/SVGTextFrame.cpp" , 3597); AnnotateMozCrashReason("MOZ_ASSERT" "(" "!HasAnyStateBits(NS_STATE_SVG_TEXT_CORRESPONDENCE_DIRTY | NS_STATE_SVG_POSITIONING_DIRTY)" ") (" "How did this happen?" ")"); do { MOZ_CrashSequence(__null , 3597); __attribute__((nomerge)) ::abort(); } while (false); } } while (false) |
| 3597 | "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?" ")", "./../../../layout/svg/SVGTextFrame.cpp" , 3597); AnnotateMozCrashReason("MOZ_ASSERT" "(" "!HasAnyStateBits(NS_STATE_SVG_TEXT_CORRESPONDENCE_DIRTY | NS_STATE_SVG_POSITIONING_DIRTY)" ") (" "How did this happen?" ")"); do { MOZ_CrashSequence(__null , 3597); __attribute__((nomerge)) ::abort(); } while (false); } } while (false); |
| 3598 | return; |
| 3599 | } |
| 3600 | |
| 3601 | MaybeReflowAnonymousBlockChild(); |
| 3602 | UpdateGlyphPositioning(); |
| 3603 | |
| 3604 | nsPresContext* presContext = PresContext(); |
| 3605 | |
| 3606 | SVGBBox r; |
| 3607 | TextRenderedRunIterator it( |
| 3608 | this, TextRenderedRunIterator::RenderedRunFilter::AllFrames); |
| 3609 | for (TextRenderedRun run = it.Current(); run.mFrame; run = it.Next()) { |
| 3610 | TextRenderedRun::GeometryFlags runFlags{ |
| 3611 | TextRenderedRun::GeometryFlag::IncludeFill}; |
| 3612 | if (!run.mFrame->StyleSVG()->mStroke.kind.IsNone()) { |
| 3613 | runFlags += TextRenderedRun::GeometryFlag::IncludeStroke; |
| 3614 | } |
| 3615 | r.UnionEdges(run.GetUserSpaceRect(presContext, runFlags)); |
| 3616 | } |
| 3617 | |
| 3618 | if (r.IsEmpty()) { |
| 3619 | mRect.SetEmpty(); |
| 3620 | } else { |
| 3621 | mRect = nsLayoutUtils::RoundGfxRectToAppRect((const Rect&)r, |
| 3622 | AppUnitsPerCSSPixel()); |
| 3623 | |
| 3624 | // Due to rounding issues when we have a transform applied, we sometimes |
| 3625 | // don't include an additional row of pixels. For now, just inflate our |
| 3626 | // covered region. |
| 3627 | if (mLastContextScale != 0.0f) { |
| 3628 | mRect.Inflate( |
| 3629 | ceil(presContext->AppUnitsPerDevPixel() / mLastContextScale)); |
| 3630 | } |
| 3631 | } |
| 3632 | |
| 3633 | if (HasAnyStateBits(NS_FRAME_FIRST_REFLOW)) { |
| 3634 | // Make sure we have our filter property (if any) before calling |
| 3635 | // FinishAndStoreOverflow (subsequent filter changes are handled off |
| 3636 | // nsChangeHint_UpdateEffects): |
| 3637 | SVGObserverUtils::UpdateEffects(this); |
| 3638 | } |
| 3639 | |
| 3640 | // Now unset the various reflow bits. Do this before calling |
| 3641 | // FinishAndStoreOverflow since FinishAndStoreOverflow can require glyph |
| 3642 | // positions (to resolve transform-origin). |
| 3643 | RemoveStateBits(NS_FRAME_FIRST_REFLOW | NS_FRAME_IS_DIRTY | |
| 3644 | NS_FRAME_HAS_DIRTY_CHILDREN); |
| 3645 | |
| 3646 | nsRect overflow = nsRect(nsPoint(0, 0), mRect.Size()); |
| 3647 | OverflowAreas overflowAreas(overflow, overflow); |
| 3648 | FinishAndStoreOverflow(overflowAreas, mRect.Size()); |
| 3649 | } |
| 3650 | |
| 3651 | /** |
| 3652 | * Converts SVGUtils::eBBox* flags into TextRenderedRun flags appropriate |
| 3653 | * for the specified rendered run. |
| 3654 | */ |
| 3655 | static TextRenderedRun::GeometryFlags TextRenderedRunFlagsForBBoxContribution( |
| 3656 | const TextRenderedRun& aRun, SVGBBoxFlags aBBoxFlags) { |
| 3657 | TextRenderedRun::GeometryFlags flags; |
| 3658 | if (aBBoxFlags.contains(SVGBBoxFlag::IncludeFillGeometry)) { |
| 3659 | flags += TextRenderedRun::GeometryFlag::IncludeFill; |
| 3660 | } |
| 3661 | if (aBBoxFlags.contains(SVGBBoxFlag::IncludeStrokeGeometry) || |
| 3662 | (aBBoxFlags.contains(SVGBBoxFlag::IncludeStroke) && |
| 3663 | SVGUtils::HasStroke(aRun.mFrame))) { |
| 3664 | flags += TextRenderedRun::GeometryFlag::IncludeStroke; |
| 3665 | } |
| 3666 | return flags; |
| 3667 | } |
| 3668 | |
| 3669 | SVGBBox SVGTextFrame::GetBBoxContribution(const Matrix& aToBBoxUserspace, |
| 3670 | SVGBBoxFlags aFlags) { |
| 3671 | 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()" , "./../../../layout/svg/SVGTextFrame.cpp", 3671); MOZ_PretendNoReturn (); } } while (0); |
| 3672 | SVGBBox bbox; |
| 3673 | |
| 3674 | if (aFlags.contains(SVGBBoxFlag::ForGetClientRects)) { |
| 3675 | if (!mRect.IsEmpty()) { |
| 3676 | Rect rect = NSRectToRect(mRect, AppUnitsPerCSSPixel()); |
| 3677 | bbox = aToBBoxUserspace.TransformBounds(rect); |
| 3678 | } |
| 3679 | return bbox; |
| 3680 | } |
| 3681 | |
| 3682 | nsIFrame* kid = PrincipalChildList().FirstChild(); |
| 3683 | if (kid && kid->IsSubtreeDirty()) { |
| 3684 | // Return an empty bbox if our kid's subtree is dirty. This may be called |
| 3685 | // in that situation, e.g. when we're building a display list after an |
| 3686 | // interrupted reflow. This can also be called during reflow before we've |
| 3687 | // been reflowed, e.g. if an earlier sibling is calling |
| 3688 | // FinishAndStoreOverflow and needs our parent's perspective matrix, which |
| 3689 | // depends on the SVG bbox contribution of this frame. In the latter |
| 3690 | // situation, when all siblings have been reflowed, the parent will compute |
| 3691 | // its perspective and rerun FinishAndStoreOverflow for all its children. |
| 3692 | return bbox; |
| 3693 | } |
| 3694 | |
| 3695 | return GetSubtreeBBox(nullptr, aToBBoxUserspace, aFlags); |
| 3696 | } |
| 3697 | |
| 3698 | SVGBBox SVGTextFrame::GetSubtreeBBox(const nsIFrame* aSubtree, |
| 3699 | const Matrix& aToBBoxUserspace, |
| 3700 | SVGBBoxFlags aFlags) { |
| 3701 | UpdateGlyphPositioning(); |
| 3702 | |
| 3703 | nsPresContext* presContext = PresContext(); |
| 3704 | |
| 3705 | SVGBBox bbox; |
| 3706 | TextRenderedRunIterator it( |
| 3707 | this, TextRenderedRunIterator::RenderedRunFilter::AllFrames, aSubtree); |
| 3708 | for (TextRenderedRun run = it.Current(); run.mFrame; run = it.Next()) { |
| 3709 | TextRenderedRun::GeometryFlags flags = |
| 3710 | TextRenderedRunFlagsForBBoxContribution(run, aFlags); |
| 3711 | gfxMatrix m = ThebesMatrix(aToBBoxUserspace); |
| 3712 | SVGBBox bboxForRun = run.GetUserSpaceRect(presContext, flags, &m); |
| 3713 | if (aFlags.contains(SVGBBoxFlag::DisregardCSSZoom)) { |
| 3714 | bboxForRun.Scale(1 / run.mFrame->Style()->EffectiveZoom().ToFloat()); |
| 3715 | } |
| 3716 | |
| 3717 | bbox.UnionEdges(bboxForRun); |
| 3718 | } |
| 3719 | |
| 3720 | return bbox; |
| 3721 | } |
| 3722 | |
| 3723 | //---------------------------------------------------------------------- |
| 3724 | // SVGTextFrame SVG DOM methods |
| 3725 | |
| 3726 | /** |
| 3727 | * Returns whether the specified node has any non-empty Text |
| 3728 | * beneath it. |
| 3729 | */ |
| 3730 | static bool HasTextContent(nsIContent* aContent) { |
| 3731 | NS_ASSERTION(aContent, "expected non-null aContent")do { if (!(aContent)) { NS_DebugBreak(NS_DEBUG_ASSERTION, "expected non-null aContent" , "aContent", "./../../../layout/svg/SVGTextFrame.cpp", 3731) ; MOZ_PretendNoReturn(); } } while (0); |
| 3732 | |
| 3733 | TextNodeIterator it(aContent); |
| 3734 | for (Text* text = it.GetCurrent(); text; text = it.GetNext()) { |
| 3735 | if (text->TextLength() != 0) { |
| 3736 | return true; |
| 3737 | } |
| 3738 | } |
| 3739 | return false; |
| 3740 | } |
| 3741 | |
| 3742 | /** |
| 3743 | * Returns the number of DOM characters beneath the specified node. |
| 3744 | */ |
| 3745 | static uint32_t GetTextContentLength(nsIContent* aContent) { |
| 3746 | NS_ASSERTION(aContent, "expected non-null aContent")do { if (!(aContent)) { NS_DebugBreak(NS_DEBUG_ASSERTION, "expected non-null aContent" , "aContent", "./../../../layout/svg/SVGTextFrame.cpp", 3746) ; MOZ_PretendNoReturn(); } } while (0); |
| 3747 | |
| 3748 | uint32_t length = 0; |
| 3749 | TextNodeIterator it(aContent); |
| 3750 | for (Text* text = it.GetCurrent(); text; text = it.GetNext()) { |
| 3751 | length += text->TextLength(); |
| 3752 | } |
| 3753 | return length; |
| 3754 | } |
| 3755 | |
| 3756 | int32_t SVGTextFrame::ConvertTextElementCharIndexToAddressableIndex( |
| 3757 | int32_t aIndex, dom::SVGTextContentElement* aElement) { |
| 3758 | CharIterator it(this, CharIterator::CharacterFilter::Original, aElement); |
| 3759 | if (!it.AdvanceToSubtree()) { |
| 3760 | return -1; |
| 3761 | } |
| 3762 | int32_t result = 0; |
| 3763 | int32_t textElementCharIndex; |
| 3764 | while (!it.AtEnd() && it.IsWithinSubtree()) { |
| 3765 | bool addressable = !it.IsOriginalCharUnaddressable(); |
| 3766 | textElementCharIndex = it.TextElementCharIndex(); |
| 3767 | it.Next(); |
| 3768 | uint32_t delta = it.TextElementCharIndex() - textElementCharIndex; |
| 3769 | aIndex -= delta; |
| 3770 | if (addressable) { |
| 3771 | if (aIndex < 0) { |
| 3772 | return result; |
| 3773 | } |
| 3774 | result += delta; |
| 3775 | } |
| 3776 | } |
| 3777 | return -1; |
| 3778 | } |
| 3779 | |
| 3780 | /** |
| 3781 | * Implements the SVG DOM GetNumberOfChars method for the specified |
| 3782 | * text content element. |
| 3783 | */ |
| 3784 | uint32_t SVGTextFrame::GetNumberOfChars(dom::SVGTextContentElement* aElement) { |
| 3785 | nsIFrame* kid = PrincipalChildList().FirstChild(); |
| 3786 | if (kid->IsSubtreeDirty()) { |
| 3787 | // We're never reflowed if we're under a non-SVG element that is |
| 3788 | // never reflowed (such as the HTML 'caption' element). |
| 3789 | return 0; |
| 3790 | } |
| 3791 | |
| 3792 | UpdateGlyphPositioning(); |
| 3793 | |
| 3794 | uint32_t n = 0; |
| 3795 | CharIterator it(this, CharIterator::CharacterFilter::Addressable, aElement); |
| 3796 | if (it.AdvanceToSubtree()) { |
| 3797 | while (!it.AtEnd() && it.IsWithinSubtree()) { |
| 3798 | n++; |
| 3799 | it.Next(); |
| 3800 | } |
| 3801 | } |
| 3802 | return n; |
| 3803 | } |
| 3804 | |
| 3805 | /** |
| 3806 | * Implements the SVG DOM GetComputedTextLength method for the specified |
| 3807 | * text child element. |
| 3808 | */ |
| 3809 | float SVGTextFrame::GetComputedTextLength( |
| 3810 | dom::SVGTextContentElement* aElement) { |
| 3811 | nsIFrame* kid = PrincipalChildList().FirstChild(); |
| 3812 | if (kid->IsSubtreeDirty()) { |
| 3813 | // We're never reflowed if we're under a non-SVG element that is |
| 3814 | // never reflowed (such as the HTML 'caption' element). |
| 3815 | // |
| 3816 | // If we ever decide that we need to return accurate values here, |
| 3817 | // we could do similar work to GetSubStringLength. |
| 3818 | return 0; |
| 3819 | } |
| 3820 | |
| 3821 | UpdateGlyphPositioning(); |
| 3822 | |
| 3823 | float cssPxPerDevPx = nsPresContext::AppUnitsToFloatCSSPixels( |
| 3824 | PresContext()->AppUnitsPerDevPixel()); |
| 3825 | |
| 3826 | nscoord length = 0; |
| 3827 | TextRenderedRunIterator it( |
| 3828 | this, TextRenderedRunIterator::RenderedRunFilter::AllFrames, aElement); |
| 3829 | for (TextRenderedRun run = it.Current(); run.mFrame; run = it.Next()) { |
| 3830 | length += |
| 3831 | run.GetAdvanceWidth() / run.mFrame->Style()->EffectiveZoom().ToFloat(); |
| 3832 | } |
| 3833 | |
| 3834 | return PresContext()->AppUnitsToGfxUnits(length) * cssPxPerDevPx * |
| 3835 | mLengthAdjustScaleFactor / mFontSizeScaleFactor; |
| 3836 | } |
| 3837 | |
| 3838 | /** |
| 3839 | * Implements the SVG DOM SelectSubString method for the specified |
| 3840 | * text content element. |
| 3841 | */ |
| 3842 | void SVGTextFrame::SelectSubString(dom::SVGTextContentElement* aElement, |
| 3843 | uint32_t charnum, uint32_t nchars, |
| 3844 | ErrorResult& aRv) { |
| 3845 | nsIFrame* kid = PrincipalChildList().FirstChild(); |
| 3846 | if (kid->IsSubtreeDirty()) { |
| 3847 | // We're never reflowed if we're under a non-SVG element that is |
| 3848 | // never reflowed (such as the HTML 'caption' element). |
| 3849 | // XXXbz Should this just return without throwing like the no-frame case? |
| 3850 | aRv.ThrowInvalidStateError("No layout information available for SVG text"); |
| 3851 | return; |
| 3852 | } |
| 3853 | |
| 3854 | UpdateGlyphPositioning(); |
| 3855 | |
| 3856 | RefPtr<nsIContent> content; |
| 3857 | |
| 3858 | // Ensure the destructor of CharIterator runs before calling HandleClick. |
| 3859 | { |
| 3860 | // Convert charnum/nchars from addressable characters relative to |
| 3861 | // aElement to global character indices. |
| 3862 | CharIterator chit(this, CharIterator::CharacterFilter::Addressable, |
| 3863 | aElement); |
| 3864 | if (!chit.AdvanceToSubtree() || !chit.Next(charnum) || |
| 3865 | chit.IsAfterSubtree()) { |
| 3866 | aRv.ThrowIndexSizeError("Character index out of range"); |
| 3867 | return; |
| 3868 | } |
| 3869 | charnum = chit.TextElementCharIndex(); |
| 3870 | content = chit.GetTextFrame()->GetContent(); |
| 3871 | chit.NextWithinSubtree(nchars); |
| 3872 | nchars = chit.TextElementCharIndex() - charnum; |
| 3873 | } |
| 3874 | |
| 3875 | RefPtr<nsFrameSelection> frameSelection = GetFrameSelection(); |
| 3876 | |
| 3877 | frameSelection->HandleClick(content, charnum, charnum + nchars, |
| 3878 | nsFrameSelection::FocusMode::kCollapseToNewPoint, |
| 3879 | CaretAssociationHint::Before); |
| 3880 | } |
| 3881 | |
| 3882 | /** |
| 3883 | * For some content we cannot (or currently cannot) compute the length |
| 3884 | * without reflowing. In those cases we need to fall back to using |
| 3885 | * GetSubStringLengthSlowFallback. |
| 3886 | * |
| 3887 | * We fall back for textPath since we need glyph positioning in order to |
| 3888 | * tell if any characters should be ignored due to having fallen off the |
| 3889 | * end of the textPath. |
| 3890 | * |
| 3891 | * We fall back for bidi because GetTrimmedOffsets does not produce the |
| 3892 | * correct results for bidi continuations when passed aPostReflow = false. |
| 3893 | * XXX It may be possible to determine which continuations to trim from (and |
| 3894 | * which sides), but currently we don't do that. It would require us to |
| 3895 | * identify the visual (rather than logical) start and end of the line, to |
| 3896 | * avoid trimming at line-internal frame boundaries. Maybe nsBidiPresUtils |
| 3897 | * methods like GetFrameToRightOf and GetFrameToLeftOf would help? |
| 3898 | * |
| 3899 | */ |
| 3900 | bool SVGTextFrame::RequiresSlowFallbackForSubStringLength() { |
| 3901 | TextFrameIterator frameIter(this); |
| 3902 | for (nsTextFrame* frame = frameIter.GetCurrent(); frame; |
| 3903 | frame = frameIter.GetNext()) { |
| 3904 | if (frameIter.TextPathFrame() || frame->GetNextContinuation()) { |
| 3905 | return true; |
| 3906 | } |
| 3907 | } |
| 3908 | return false; |
| 3909 | } |
| 3910 | |
| 3911 | /** |
| 3912 | * Implements the SVG DOM GetSubStringLength method for the specified |
| 3913 | * text content element. |
| 3914 | */ |
| 3915 | float SVGTextFrame::GetSubStringLengthFastPath( |
| 3916 | dom::SVGTextContentElement* aElement, uint32_t charnum, uint32_t nchars, |
| 3917 | ErrorResult& aRv) { |
| 3918 | 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()" , "./../../../layout/svg/SVGTextFrame.cpp", 3918); AnnotateMozCrashReason ("MOZ_ASSERT" "(" "!RequiresSlowFallbackForSubStringLength()" ")"); do { MOZ_CrashSequence(__null, 3918); __attribute__((nomerge )) ::abort(); } while (false); } } while (false); |
| 3919 | |
| 3920 | // We only need our text correspondence to be up to date (no need to call |
| 3921 | // UpdateGlyphPositioning). |
| 3922 | TextNodeCorrespondenceRecorder::RecordCorrespondence(this); |
| 3923 | |
| 3924 | // Convert charnum/nchars from addressable characters relative to |
| 3925 | // aElement to global character indices. |
| 3926 | CharIterator chit(this, CharIterator::CharacterFilter::Addressable, aElement, |
| 3927 | /* aPostReflow */ false); |
| 3928 | if (!chit.AdvanceToSubtree() || !chit.Next(charnum) || |
| 3929 | chit.IsAfterSubtree()) { |
| 3930 | aRv.ThrowIndexSizeError("Character index out of range"); |
| 3931 | return 0; |
| 3932 | } |
| 3933 | |
| 3934 | // We do this after the ThrowIndexSizeError() bit so JS calls correctly throw |
| 3935 | // when necessary. |
| 3936 | if (nchars == 0) { |
| 3937 | return 0.0f; |
| 3938 | } |
| 3939 | |
| 3940 | charnum = chit.TextElementCharIndex(); |
| 3941 | chit.NextWithinSubtree(nchars); |
| 3942 | nchars = chit.TextElementCharIndex() - charnum; |
| 3943 | |
| 3944 | // Sum of the substring advances. |
| 3945 | nscoord textLength = 0; |
| 3946 | |
| 3947 | TextFrameIterator frit(this); // aSubtree = nullptr |
| 3948 | |
| 3949 | // Index of the first non-skipped char in the frame, and of a subsequent char |
| 3950 | // that we're interested in. Both are relative to the index of the first |
| 3951 | // non-skipped char in the ancestor <text> element. |
| 3952 | uint32_t frameStartTextElementCharIndex = 0; |
| 3953 | uint32_t textElementCharIndex; |
| 3954 | |
| 3955 | for (nsTextFrame* frame = frit.GetCurrent(); frame; frame = frit.GetNext()) { |
| 3956 | frameStartTextElementCharIndex += frit.UndisplayedCharacters(); |
| 3957 | textElementCharIndex = frameStartTextElementCharIndex; |
| 3958 | |
| 3959 | // Offset into frame's Text: |
| 3960 | const uint32_t untrimmedOffset = frame->GetContentOffset(); |
| 3961 | const uint32_t untrimmedLength = frame->GetContentEnd() - untrimmedOffset; |
| 3962 | |
| 3963 | // Trim the offset/length to remove any leading/trailing white space. |
| 3964 | uint32_t trimmedOffset = untrimmedOffset; |
| 3965 | uint32_t trimmedLength = untrimmedLength; |
| 3966 | nsTextFrame::TrimmedOffsets trimmedOffsets = frame->GetTrimmedOffsets( |
| 3967 | frame->CharacterDataBuffer(), |
| 3968 | nsTextFrame::TrimmedOffsetFlags::NotPostReflow); |
| 3969 | TrimOffsets(trimmedOffset, trimmedLength, trimmedOffsets); |
| 3970 | |
| 3971 | textElementCharIndex += trimmedOffset - untrimmedOffset; |
| 3972 | |
| 3973 | if (textElementCharIndex >= charnum + nchars) { |
| 3974 | break; // we're past the end of the substring |
| 3975 | } |
| 3976 | |
| 3977 | uint32_t offset = textElementCharIndex; |
| 3978 | |
| 3979 | // Intersect the substring we are interested in with the range covered by |
| 3980 | // the nsTextFrame. |
| 3981 | IntersectInterval(offset, trimmedLength, charnum, nchars); |
| 3982 | |
| 3983 | if (trimmedLength != 0) { |
| 3984 | // Convert offset into an index into the frame. |
| 3985 | offset += trimmedOffset - textElementCharIndex; |
| 3986 | |
| 3987 | gfxSkipCharsIterator it = frame->EnsureTextRun(nsTextFrame::eInflated); |
| 3988 | gfxTextRun* textRun = frame->GetTextRun(nsTextFrame::eInflated); |
| 3989 | auto& provider = PropertyProviderFor(frame); |
| 3990 | |
| 3991 | Range range = ConvertOriginalToSkipped(it, offset, trimmedLength); |
| 3992 | |
| 3993 | // Accumulate the advance. |
| 3994 | textLength += textRun->GetAdvanceWidth(range, &provider) / |
| 3995 | frame->Style()->EffectiveZoom().ToFloat(); |
| 3996 | } |
| 3997 | |
| 3998 | // Advance, ready for next call: |
| 3999 | frameStartTextElementCharIndex += untrimmedLength; |
| 4000 | } |
| 4001 | |
| 4002 | nsPresContext* presContext = PresContext(); |
| 4003 | float cssPxPerDevPx = nsPresContext::AppUnitsToFloatCSSPixels( |
| 4004 | presContext->AppUnitsPerDevPixel()); |
| 4005 | |
| 4006 | return presContext->AppUnitsToGfxUnits(textLength) * cssPxPerDevPx / |
| 4007 | mFontSizeScaleFactor; |
| 4008 | } |
| 4009 | |
| 4010 | float SVGTextFrame::GetSubStringLengthSlowFallback( |
| 4011 | dom::SVGTextContentElement* aElement, uint32_t charnum, uint32_t nchars, |
| 4012 | ErrorResult& aRv) { |
| 4013 | UpdateGlyphPositioning(); |
| 4014 | |
| 4015 | // Convert charnum/nchars from addressable characters relative to |
| 4016 | // aElement to global character indices. |
| 4017 | CharIterator chit(this, CharIterator::CharacterFilter::Addressable, aElement); |
| 4018 | if (!chit.AdvanceToSubtree() || !chit.Next(charnum) || |
| 4019 | chit.IsAfterSubtree()) { |
| 4020 | aRv.ThrowIndexSizeError("Character index out of range"); |
| 4021 | return 0; |
| 4022 | } |
| 4023 | |
| 4024 | if (nchars == 0) { |
| 4025 | return 0.0f; |
| 4026 | } |
| 4027 | |
| 4028 | charnum = chit.TextElementCharIndex(); |
| 4029 | chit.NextWithinSubtree(nchars); |
| 4030 | nchars = chit.TextElementCharIndex() - charnum; |
| 4031 | |
| 4032 | // Find each rendered run that intersects with the range defined |
| 4033 | // by charnum/nchars. |
| 4034 | nscoord textLength = 0; |
| 4035 | TextRenderedRunIterator runIter( |
| 4036 | this, TextRenderedRunIterator::RenderedRunFilter::AllFrames); |
| 4037 | TextRenderedRun run = runIter.Current(); |
| 4038 | while (run.mFrame) { |
| 4039 | // If this rendered run is past the substring we are interested in, we |
| 4040 | // are done. |
| 4041 | uint32_t offset = run.mTextElementCharIndex; |
| 4042 | if (offset >= charnum + nchars) { |
| 4043 | break; |
| 4044 | } |
| 4045 | |
| 4046 | // Intersect the substring we are interested in with the range covered by |
| 4047 | // the rendered run. |
| 4048 | uint32_t length = run.mTextFrameContentLength; |
| 4049 | IntersectInterval(offset, length, charnum, nchars); |
| 4050 | |
| 4051 | if (length != 0) { |
| 4052 | // Convert offset into an index into the frame. |
| 4053 | offset += run.mTextFrameContentOffset - run.mTextElementCharIndex; |
| 4054 | |
| 4055 | gfxSkipCharsIterator it = |
| 4056 | run.mFrame->EnsureTextRun(nsTextFrame::eInflated); |
| 4057 | gfxTextRun* textRun = run.mFrame->GetTextRun(nsTextFrame::eInflated); |
| 4058 | auto& provider = PropertyProviderFor(run.mFrame); |
| 4059 | |
| 4060 | Range range = ConvertOriginalToSkipped(it, offset, length); |
| 4061 | |
| 4062 | // Accumulate the advance. |
| 4063 | textLength += textRun->GetAdvanceWidth(range, &provider) / |
| 4064 | run.mFrame->Style()->EffectiveZoom().ToFloat(); |
| 4065 | } |
| 4066 | |
| 4067 | run = runIter.Next(); |
| 4068 | } |
| 4069 | |
| 4070 | nsPresContext* presContext = PresContext(); |
| 4071 | float cssPxPerDevPx = nsPresContext::AppUnitsToFloatCSSPixels( |
| 4072 | presContext->AppUnitsPerDevPixel()); |
| 4073 | |
| 4074 | return presContext->AppUnitsToGfxUnits(textLength) * cssPxPerDevPx / |
| 4075 | mFontSizeScaleFactor; |
| 4076 | } |
| 4077 | |
| 4078 | /** |
| 4079 | * Implements the SVG DOM GetCharNumAtPosition method for the specified |
| 4080 | * text content element. |
| 4081 | */ |
| 4082 | int32_t SVGTextFrame::GetCharNumAtPosition(dom::SVGTextContentElement* aElement, |
| 4083 | const gfx::Point& aPoint) { |
| 4084 | nsIFrame* kid = PrincipalChildList().FirstChild(); |
| 4085 | if (kid->IsSubtreeDirty()) { |
| 4086 | // We're never reflowed if we're under a non-SVG element that is |
| 4087 | // never reflowed (such as the HTML 'caption' element). |
| 4088 | return -1; |
| 4089 | } |
| 4090 | |
| 4091 | UpdateGlyphPositioning(); |
| 4092 | |
| 4093 | nsPresContext* context = PresContext(); |
| 4094 | |
| 4095 | gfxPoint p = ThebesPoint(aPoint) * dom::UserSpaceMetrics::GetZoom(aElement); |
| 4096 | |
| 4097 | int32_t result = -1; |
| 4098 | |
| 4099 | TextRenderedRunIterator it( |
| 4100 | this, TextRenderedRunIterator::RenderedRunFilter::AllFrames, aElement); |
| 4101 | for (TextRenderedRun run = it.Current(); run.mFrame; run = it.Next()) { |
| 4102 | // Hit test this rendered run. Later runs will override earlier ones. |
| 4103 | int32_t index = run.GetCharNumAtPosition(context, p); |
| 4104 | if (index != -1) { |
| 4105 | result = index + run.mTextElementCharIndex; |
| 4106 | } |
| 4107 | } |
| 4108 | |
| 4109 | if (result == -1) { |
| 4110 | return result; |
| 4111 | } |
| 4112 | |
| 4113 | return ConvertTextElementCharIndexToAddressableIndex(result, aElement); |
| 4114 | } |
| 4115 | |
| 4116 | /** |
| 4117 | * Implements the SVG DOM GetStartPositionOfChar method for the specified |
| 4118 | * text content element. |
| 4119 | */ |
| 4120 | already_AddRefed<DOMSVGPoint> SVGTextFrame::GetStartPositionOfChar( |
| 4121 | dom::SVGTextContentElement* aElement, uint32_t aCharNum, ErrorResult& aRv) { |
| 4122 | nsIFrame* kid = PrincipalChildList().FirstChild(); |
| 4123 | if (kid->IsSubtreeDirty()) { |
| 4124 | // We're never reflowed if we're under a non-SVG element that is |
| 4125 | // never reflowed (such as the HTML 'caption' element). |
| 4126 | aRv.ThrowInvalidStateError("No layout information available for SVG text"); |
| 4127 | return nullptr; |
| 4128 | } |
| 4129 | |
| 4130 | UpdateGlyphPositioning(); |
| 4131 | |
| 4132 | CharIterator it(this, CharIterator::CharacterFilter::Addressable, aElement); |
| 4133 | if (!it.AdvanceToSubtree() || !it.Next(aCharNum) || it.IsAfterSubtree()) { |
| 4134 | aRv.ThrowIndexSizeError("Character index out of range"); |
| 4135 | return nullptr; |
| 4136 | } |
| 4137 | |
| 4138 | // We need to return the start position of the whole glyph. |
| 4139 | uint32_t startIndex = it.GlyphStartTextElementCharIndex(); |
| 4140 | |
| 4141 | return MakeAndAddRef<DOMSVGPoint>( |
| 4142 | ToPoint(mPositions[startIndex].mPosition) / |
| 4143 | it.GetTextFrame()->Style()->EffectiveZoom().ToFloat()); |
| 4144 | } |
| 4145 | |
| 4146 | /** |
| 4147 | * Returns the advance of the entire glyph whose starting character is at |
| 4148 | * aTextElementCharIndex. |
| 4149 | * |
| 4150 | * aIterator, if provided, must be a CharIterator that already points to |
| 4151 | * aTextElementCharIndex that is restricted to aContent and is using |
| 4152 | * filter mode CharacterFilter::Addressable. |
| 4153 | */ |
| 4154 | static gfxFloat GetGlyphAdvance(SVGTextFrame* aFrame, |
| 4155 | dom::SVGTextContentElement* aElement, |
| 4156 | uint32_t aTextElementCharIndex, |
| 4157 | CharIterator* aIterator) { |
| 4158 | MOZ_ASSERT(!aIterator || (aIterator->Filter() ==do { static_assert( mozilla::detail::AssertionConditionType< decltype(!aIterator || (aIterator->Filter() == CharIterator ::CharacterFilter::Addressable && aIterator->GetSubtree () == aElement && aIterator->GlyphStartTextElementCharIndex () == aTextElementCharIndex))>::isValid, "invalid assertion condition" ); if ((__builtin_expect(!!(!(!!(!aIterator || (aIterator-> Filter() == CharIterator::CharacterFilter::Addressable && aIterator->GetSubtree() == aElement && aIterator-> GlyphStartTextElementCharIndex() == aTextElementCharIndex)))) , 0))) { do { } while (false); MOZ_ReportAssertionFailure("!aIterator || (aIterator->Filter() == CharIterator::CharacterFilter::Addressable && aIterator->GetSubtree() == aElement && aIterator->GlyphStartTextElementCharIndex() == aTextElementCharIndex)" " (" "Invalid aIterator" ")", "./../../../layout/svg/SVGTextFrame.cpp" , 4163); AnnotateMozCrashReason("MOZ_ASSERT" "(" "!aIterator || (aIterator->Filter() == CharIterator::CharacterFilter::Addressable && aIterator->GetSubtree() == aElement && aIterator->GlyphStartTextElementCharIndex() == aTextElementCharIndex)" ") (" "Invalid aIterator" ")"); do { MOZ_CrashSequence(__null , 4163); __attribute__((nomerge)) ::abort(); } while (false); } } while (false) |
| 4159 | CharIterator::CharacterFilter::Addressable &&do { static_assert( mozilla::detail::AssertionConditionType< decltype(!aIterator || (aIterator->Filter() == CharIterator ::CharacterFilter::Addressable && aIterator->GetSubtree () == aElement && aIterator->GlyphStartTextElementCharIndex () == aTextElementCharIndex))>::isValid, "invalid assertion condition" ); if ((__builtin_expect(!!(!(!!(!aIterator || (aIterator-> Filter() == CharIterator::CharacterFilter::Addressable && aIterator->GetSubtree() == aElement && aIterator-> GlyphStartTextElementCharIndex() == aTextElementCharIndex)))) , 0))) { do { } while (false); MOZ_ReportAssertionFailure("!aIterator || (aIterator->Filter() == CharIterator::CharacterFilter::Addressable && aIterator->GetSubtree() == aElement && aIterator->GlyphStartTextElementCharIndex() == aTextElementCharIndex)" " (" "Invalid aIterator" ")", "./../../../layout/svg/SVGTextFrame.cpp" , 4163); AnnotateMozCrashReason("MOZ_ASSERT" "(" "!aIterator || (aIterator->Filter() == CharIterator::CharacterFilter::Addressable && aIterator->GetSubtree() == aElement && aIterator->GlyphStartTextElementCharIndex() == aTextElementCharIndex)" ") (" "Invalid aIterator" ")"); do { MOZ_CrashSequence(__null , 4163); __attribute__((nomerge)) ::abort(); } while (false); } } while (false) |
| 4160 | aIterator->GetSubtree() == aElement &&do { static_assert( mozilla::detail::AssertionConditionType< decltype(!aIterator || (aIterator->Filter() == CharIterator ::CharacterFilter::Addressable && aIterator->GetSubtree () == aElement && aIterator->GlyphStartTextElementCharIndex () == aTextElementCharIndex))>::isValid, "invalid assertion condition" ); if ((__builtin_expect(!!(!(!!(!aIterator || (aIterator-> Filter() == CharIterator::CharacterFilter::Addressable && aIterator->GetSubtree() == aElement && aIterator-> GlyphStartTextElementCharIndex() == aTextElementCharIndex)))) , 0))) { do { } while (false); MOZ_ReportAssertionFailure("!aIterator || (aIterator->Filter() == CharIterator::CharacterFilter::Addressable && aIterator->GetSubtree() == aElement && aIterator->GlyphStartTextElementCharIndex() == aTextElementCharIndex)" " (" "Invalid aIterator" ")", "./../../../layout/svg/SVGTextFrame.cpp" , 4163); AnnotateMozCrashReason("MOZ_ASSERT" "(" "!aIterator || (aIterator->Filter() == CharIterator::CharacterFilter::Addressable && aIterator->GetSubtree() == aElement && aIterator->GlyphStartTextElementCharIndex() == aTextElementCharIndex)" ") (" "Invalid aIterator" ")"); do { MOZ_CrashSequence(__null , 4163); __attribute__((nomerge)) ::abort(); } while (false); } } while (false) |
| 4161 | aIterator->GlyphStartTextElementCharIndex() ==do { static_assert( mozilla::detail::AssertionConditionType< decltype(!aIterator || (aIterator->Filter() == CharIterator ::CharacterFilter::Addressable && aIterator->GetSubtree () == aElement && aIterator->GlyphStartTextElementCharIndex () == aTextElementCharIndex))>::isValid, "invalid assertion condition" ); if ((__builtin_expect(!!(!(!!(!aIterator || (aIterator-> Filter() == CharIterator::CharacterFilter::Addressable && aIterator->GetSubtree() == aElement && aIterator-> GlyphStartTextElementCharIndex() == aTextElementCharIndex)))) , 0))) { do { } while (false); MOZ_ReportAssertionFailure("!aIterator || (aIterator->Filter() == CharIterator::CharacterFilter::Addressable && aIterator->GetSubtree() == aElement && aIterator->GlyphStartTextElementCharIndex() == aTextElementCharIndex)" " (" "Invalid aIterator" ")", "./../../../layout/svg/SVGTextFrame.cpp" , 4163); AnnotateMozCrashReason("MOZ_ASSERT" "(" "!aIterator || (aIterator->Filter() == CharIterator::CharacterFilter::Addressable && aIterator->GetSubtree() == aElement && aIterator->GlyphStartTextElementCharIndex() == aTextElementCharIndex)" ") (" "Invalid aIterator" ")"); do { MOZ_CrashSequence(__null , 4163); __attribute__((nomerge)) ::abort(); } while (false); } } while (false) |
| 4162 | aTextElementCharIndex),do { static_assert( mozilla::detail::AssertionConditionType< decltype(!aIterator || (aIterator->Filter() == CharIterator ::CharacterFilter::Addressable && aIterator->GetSubtree () == aElement && aIterator->GlyphStartTextElementCharIndex () == aTextElementCharIndex))>::isValid, "invalid assertion condition" ); if ((__builtin_expect(!!(!(!!(!aIterator || (aIterator-> Filter() == CharIterator::CharacterFilter::Addressable && aIterator->GetSubtree() == aElement && aIterator-> GlyphStartTextElementCharIndex() == aTextElementCharIndex)))) , 0))) { do { } while (false); MOZ_ReportAssertionFailure("!aIterator || (aIterator->Filter() == CharIterator::CharacterFilter::Addressable && aIterator->GetSubtree() == aElement && aIterator->GlyphStartTextElementCharIndex() == aTextElementCharIndex)" " (" "Invalid aIterator" ")", "./../../../layout/svg/SVGTextFrame.cpp" , 4163); AnnotateMozCrashReason("MOZ_ASSERT" "(" "!aIterator || (aIterator->Filter() == CharIterator::CharacterFilter::Addressable && aIterator->GetSubtree() == aElement && aIterator->GlyphStartTextElementCharIndex() == aTextElementCharIndex)" ") (" "Invalid aIterator" ")"); do { MOZ_CrashSequence(__null , 4163); __attribute__((nomerge)) ::abort(); } while (false); } } while (false) |
| 4163 | "Invalid aIterator")do { static_assert( mozilla::detail::AssertionConditionType< decltype(!aIterator || (aIterator->Filter() == CharIterator ::CharacterFilter::Addressable && aIterator->GetSubtree () == aElement && aIterator->GlyphStartTextElementCharIndex () == aTextElementCharIndex))>::isValid, "invalid assertion condition" ); if ((__builtin_expect(!!(!(!!(!aIterator || (aIterator-> Filter() == CharIterator::CharacterFilter::Addressable && aIterator->GetSubtree() == aElement && aIterator-> GlyphStartTextElementCharIndex() == aTextElementCharIndex)))) , 0))) { do { } while (false); MOZ_ReportAssertionFailure("!aIterator || (aIterator->Filter() == CharIterator::CharacterFilter::Addressable && aIterator->GetSubtree() == aElement && aIterator->GlyphStartTextElementCharIndex() == aTextElementCharIndex)" " (" "Invalid aIterator" ")", "./../../../layout/svg/SVGTextFrame.cpp" , 4163); AnnotateMozCrashReason("MOZ_ASSERT" "(" "!aIterator || (aIterator->Filter() == CharIterator::CharacterFilter::Addressable && aIterator->GetSubtree() == aElement && aIterator->GlyphStartTextElementCharIndex() == aTextElementCharIndex)" ") (" "Invalid aIterator" ")"); do { MOZ_CrashSequence(__null , 4163); __attribute__((nomerge)) ::abort(); } while (false); } } while (false); |
| 4164 | |
| 4165 | Maybe<CharIterator> newIterator; |
| 4166 | CharIterator* it = aIterator; |
| 4167 | if (!it) { |
| 4168 | newIterator.emplace(aFrame, CharIterator::CharacterFilter::Addressable, |
| 4169 | aElement); |
| 4170 | if (!newIterator->AdvanceToSubtree()) { |
| 4171 | MOZ_ASSERT_UNREACHABLE("Invalid aElement")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 aElement" ")", "./../../../layout/svg/SVGTextFrame.cpp" , 4171); AnnotateMozCrashReason("MOZ_ASSERT" "(" "false" ") (" "MOZ_ASSERT_UNREACHABLE: " "Invalid aElement" ")"); do { MOZ_CrashSequence (__null, 4171); __attribute__((nomerge)) ::abort(); } while ( false); } } while (false); |
| 4172 | return 0.0; |
| 4173 | } |
| 4174 | it = newIterator.ptr(); |
| 4175 | } |
| 4176 | |
| 4177 | while (it->GlyphStartTextElementCharIndex() != aTextElementCharIndex) { |
| 4178 | if (!it->Next()) { |
| 4179 | 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" ")", "./../../../layout/svg/SVGTextFrame.cpp" , 4179); AnnotateMozCrashReason("MOZ_ASSERT" "(" "false" ") (" "MOZ_ASSERT_UNREACHABLE: " "Invalid aTextElementCharIndex" ")" ); do { MOZ_CrashSequence(__null, 4179); __attribute__((nomerge )) ::abort(); } while (false); } } while (false); |
| 4180 | return 0.0; |
| 4181 | } |
| 4182 | } |
| 4183 | |
| 4184 | if (it->AtEnd()) { |
| 4185 | 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" ")", "./../../../layout/svg/SVGTextFrame.cpp" , 4185); AnnotateMozCrashReason("MOZ_ASSERT" "(" "false" ") (" "MOZ_ASSERT_UNREACHABLE: " "Invalid aTextElementCharIndex" ")" ); do { MOZ_CrashSequence(__null, 4185); __attribute__((nomerge )) ::abort(); } while (false); } } while (false); |
| 4186 | return 0.0; |
| 4187 | } |
| 4188 | |
| 4189 | nsPresContext* presContext = aFrame->PresContext(); |
| 4190 | gfxFloat advance = 0.0; |
| 4191 | |
| 4192 | for (;;) { |
| 4193 | advance += it->GetAdvance(presContext); |
| 4194 | if (!it->Next() || |
| 4195 | it->GlyphStartTextElementCharIndex() != aTextElementCharIndex) { |
| 4196 | break; |
| 4197 | } |
| 4198 | } |
| 4199 | |
| 4200 | return advance; |
| 4201 | } |
| 4202 | |
| 4203 | /** |
| 4204 | * Implements the SVG DOM GetEndPositionOfChar method for the specified |
| 4205 | * text content element. |
| 4206 | */ |
| 4207 | already_AddRefed<DOMSVGPoint> SVGTextFrame::GetEndPositionOfChar( |
| 4208 | dom::SVGTextContentElement* aElement, uint32_t aCharNum, ErrorResult& aRv) { |
| 4209 | nsIFrame* kid = PrincipalChildList().FirstChild(); |
| 4210 | if (kid->IsSubtreeDirty()) { |
| 4211 | // We're never reflowed if we're under a non-SVG element that is |
| 4212 | // never reflowed (such as the HTML 'caption' element). |
| 4213 | aRv.ThrowInvalidStateError("No layout information available for SVG text"); |
| 4214 | return nullptr; |
| 4215 | } |
| 4216 | |
| 4217 | UpdateGlyphPositioning(); |
| 4218 | |
| 4219 | CharIterator it(this, CharIterator::CharacterFilter::Addressable, aElement); |
| 4220 | if (!it.AdvanceToSubtree() || !it.Next(aCharNum) || it.IsAfterSubtree()) { |
| 4221 | aRv.ThrowIndexSizeError("Character index out of range"); |
| 4222 | return nullptr; |
| 4223 | } |
| 4224 | |
| 4225 | RefPtr<const gfxTextRun> textRun = it.TextRun(); |
| 4226 | |
| 4227 | // We need to return the end position of the whole glyph. |
| 4228 | uint32_t startIndex = it.GlyphStartTextElementCharIndex(); |
| 4229 | float zoom = it.GetTextFrame()->Style()->EffectiveZoom().ToFloat(); |
| 4230 | |
| 4231 | // Get the advance of the glyph. |
| 4232 | gfxFloat advance = |
| 4233 | GetGlyphAdvance(this, aElement, startIndex, |
| 4234 | it.IsClusterAndLigatureGroupStart() ? &it : nullptr) / |
| 4235 | mFontSizeScaleFactor; |
| 4236 | if (textRun->IsInlineReversed()) { |
| 4237 | advance = -advance; |
| 4238 | } |
| 4239 | Point p = textRun->IsVertical() ? Point(0, advance) : Point(advance, 0); |
| 4240 | |
| 4241 | // The end position is the start position plus the advance in the direction |
| 4242 | // of the glyph's rotation. |
| 4243 | Matrix m = Matrix::Rotation(mPositions[startIndex].mAngle) * |
| 4244 | Matrix::Translation(ToPoint(mPositions[startIndex].mPosition)); |
| 4245 | |
| 4246 | return MakeAndAddRef<DOMSVGPoint>(m.TransformPoint(p) / zoom); |
| 4247 | } |
| 4248 | |
| 4249 | /** |
| 4250 | * Implements the SVG DOM GetExtentOfChar method for the specified |
| 4251 | * text content element. |
| 4252 | */ |
| 4253 | already_AddRefed<SVGRect> SVGTextFrame::GetExtentOfChar( |
| 4254 | dom::SVGTextContentElement* aElement, uint32_t aCharNum, ErrorResult& aRv) { |
| 4255 | nsIFrame* kid = PrincipalChildList().FirstChild(); |
| 4256 | if (kid->IsSubtreeDirty()) { |
| 4257 | // We're never reflowed if we're under a non-SVG element that is |
| 4258 | // never reflowed (such as the HTML 'caption' element). |
| 4259 | aRv.ThrowInvalidStateError("No layout information available for SVG text"); |
| 4260 | return nullptr; |
| 4261 | } |
| 4262 | |
| 4263 | UpdateGlyphPositioning(); |
| 4264 | |
| 4265 | // Search for the character whose addressable index is aCharNum. |
| 4266 | CharIterator it(this, CharIterator::CharacterFilter::Addressable, aElement); |
| 4267 | if (!it.AdvanceToSubtree() || !it.Next(aCharNum) || it.IsAfterSubtree()) { |
| 4268 | aRv.ThrowIndexSizeError("Character index out of range"); |
| 4269 | return nullptr; |
| 4270 | } |
| 4271 | |
| 4272 | nsPresContext* presContext = PresContext(); |
| 4273 | float cssPxPerDevPx = nsPresContext::AppUnitsToFloatCSSPixels( |
| 4274 | presContext->AppUnitsPerDevPixel()); |
| 4275 | |
| 4276 | nsTextFrame* textFrame = it.GetTextFrame(); |
| 4277 | uint32_t startIndex = it.GlyphStartTextElementCharIndex(); |
| 4278 | RefPtr<const gfxTextRun> textRun = it.TextRun(); |
| 4279 | |
| 4280 | // Get the glyph advance. |
| 4281 | gfxFloat advance = |
| 4282 | GetGlyphAdvance(this, aElement, startIndex, |
| 4283 | it.IsClusterAndLigatureGroupStart() ? &it : nullptr); |
| 4284 | gfxFloat x = textRun->IsInlineReversed() ? -advance : 0.0; |
| 4285 | |
| 4286 | // The ascent and descent gives the height of the glyph. |
| 4287 | gfxFloat ascent, descent; |
| 4288 | GetAscentAndDescentInAppUnits(textFrame, ascent, descent); |
| 4289 | |
| 4290 | // The horizontal extent is the origin of the glyph plus the advance |
| 4291 | // in the direction of the glyph's rotation. |
| 4292 | gfxMatrix m; |
| 4293 | m.PreTranslate(mPositions[startIndex].mPosition); |
| 4294 | m.PreRotate(mPositions[startIndex].mAngle); |
| 4295 | m.PreScale(1 / mFontSizeScaleFactor, 1 / mFontSizeScaleFactor); |
| 4296 | |
| 4297 | nscoord baseline = GetBaselinePosition( |
| 4298 | textFrame, textRun, it.DominantBaseline(), mFontSizeScaleFactor); |
| 4299 | |
| 4300 | gfxRect glyphRect; |
| 4301 | if (textRun->IsVertical()) { |
| 4302 | glyphRect = gfxRect( |
| 4303 | -presContext->AppUnitsToGfxUnits(baseline) * cssPxPerDevPx, x, |
| 4304 | presContext->AppUnitsToGfxUnits(ascent + descent) * cssPxPerDevPx, |
| 4305 | advance); |
| 4306 | } else { |
| 4307 | glyphRect = gfxRect( |
| 4308 | x, -presContext->AppUnitsToGfxUnits(baseline) * cssPxPerDevPx, advance, |
| 4309 | presContext->AppUnitsToGfxUnits(ascent + descent) * cssPxPerDevPx); |
| 4310 | } |
| 4311 | |
| 4312 | // Transform the glyph's rect into user space. |
| 4313 | gfxRect r = m.TransformBounds(glyphRect); |
| 4314 | r.Scale(1 / textFrame->Style()->EffectiveZoom().ToFloat()); |
| 4315 | |
| 4316 | return MakeAndAddRef<SVGRect>(aElement, ToRect(r)); |
| 4317 | } |
| 4318 | |
| 4319 | /** |
| 4320 | * Implements the SVG DOM GetRotationOfChar method for the specified |
| 4321 | * text content element. |
| 4322 | */ |
| 4323 | float SVGTextFrame::GetRotationOfChar(dom::SVGTextContentElement* aElement, |
| 4324 | uint32_t aCharNum, ErrorResult& aRv) { |
| 4325 | nsIFrame* kid = PrincipalChildList().FirstChild(); |
| 4326 | if (kid->IsSubtreeDirty()) { |
| 4327 | // We're never reflowed if we're under a non-SVG element that is |
| 4328 | // never reflowed (such as the HTML 'caption' element). |
| 4329 | aRv.ThrowInvalidStateError("No layout information available for SVG text"); |
| 4330 | return 0; |
| 4331 | } |
| 4332 | |
| 4333 | UpdateGlyphPositioning(); |
| 4334 | |
| 4335 | CharIterator it(this, CharIterator::CharacterFilter::Addressable, aElement); |
| 4336 | if (!it.AdvanceToSubtree() || !it.Next(aCharNum) || it.IsAfterSubtree()) { |
| 4337 | aRv.ThrowIndexSizeError("Character index out of range"); |
| 4338 | return 0; |
| 4339 | } |
| 4340 | |
| 4341 | // We need to account for the glyph's underlying orientation. |
| 4342 | const gfxTextRun::GlyphRun& glyphRun = it.GlyphRun(); |
| 4343 | int32_t glyphOrientation = |
| 4344 | 90 * (glyphRun.IsSidewaysRight() - glyphRun.IsSidewaysLeft()); |
| 4345 | |
| 4346 | return mPositions[it.TextElementCharIndex()].mAngle * 180.0 / |
| 4347 | std::numbers::pi + |
| 4348 | glyphOrientation; |
| 4349 | } |
| 4350 | |
| 4351 | //---------------------------------------------------------------------- |
| 4352 | // SVGTextFrame text layout methods |
| 4353 | |
| 4354 | /** |
| 4355 | * Given the character position array before values have been filled in |
| 4356 | * to any unspecified positions, and an array of dx/dy values, returns whether |
| 4357 | * a character at a given index should start a new rendered run. |
| 4358 | * |
| 4359 | * @param aPositions The array of character positions before unspecified |
| 4360 | * positions have been filled in and dx/dy values have been added to them. |
| 4361 | * @param aDeltas The array of dx/dy values. |
| 4362 | * @param aIndex The character index in question. |
| 4363 | */ |
| 4364 | static bool ShouldStartRunAtIndex(const nsTArray<CharPosition>& aPositions, |
| 4365 | const nsTArray<gfxPoint>& aDeltas, |
| 4366 | uint32_t aIndex) { |
| 4367 | if (aIndex == 0) { |
| 4368 | return true; |
| 4369 | } |
| 4370 | |
| 4371 | if (aIndex < aPositions.Length()) { |
| 4372 | // If an explicit x or y value was given, start a new run. |
| 4373 | if (aPositions[aIndex].IsXSpecified() || |
| 4374 | aPositions[aIndex].IsYSpecified()) { |
| 4375 | return true; |
| 4376 | } |
| 4377 | |
| 4378 | // If a non-zero rotation was given, or the previous character had a non- |
| 4379 | // zero rotation, start a new run. |
| 4380 | if ((aPositions[aIndex].IsAngleSpecified() && |
| 4381 | aPositions[aIndex].mAngle != 0.0f) || |
| 4382 | (aPositions[aIndex - 1].IsAngleSpecified() && |
| 4383 | (aPositions[aIndex - 1].mAngle != 0.0f))) { |
| 4384 | return true; |
| 4385 | } |
| 4386 | } |
| 4387 | |
| 4388 | if (aIndex < aDeltas.Length()) { |
| 4389 | // If a non-zero dx or dy value was given, start a new run. |
| 4390 | if (aDeltas[aIndex].x != 0.0 || aDeltas[aIndex].y != 0.0) { |
| 4391 | return true; |
| 4392 | } |
| 4393 | } |
| 4394 | |
| 4395 | return false; |
| 4396 | } |
| 4397 | |
| 4398 | bool SVGTextFrame::ResolvePositionsForNode(nsIContent* aContent, |
| 4399 | uint32_t& aIndex, bool aInTextPath, |
| 4400 | bool& aForceStartOfChunk, |
| 4401 | nsTArray<gfxPoint>& aDeltas) { |
| 4402 | if (aContent->IsText()) { |
| 4403 | // We found a text node. |
| 4404 | uint32_t length = aContent->AsText()->TextLength(); |
| 4405 | if (length) { |
| 4406 | uint32_t end = aIndex + length; |
| 4407 | if (MOZ_UNLIKELY(end > mPositions.Length())(__builtin_expect(!!(end > mPositions.Length()), 0))) { |
| 4408 | 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" ")", "./../../../layout/svg/SVGTextFrame.cpp", 4410); AnnotateMozCrashReason ("MOZ_ASSERT" "(" "false" ") (" "MOZ_ASSERT_UNREACHABLE: " "length of mPositions does not match characters " "found by iterating content" ")"); do { MOZ_CrashSequence(__null , 4410); __attribute__((nomerge)) ::abort(); } while (false); } } while (false) |
| 4409 | "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" ")", "./../../../layout/svg/SVGTextFrame.cpp", 4410); AnnotateMozCrashReason ("MOZ_ASSERT" "(" "false" ") (" "MOZ_ASSERT_UNREACHABLE: " "length of mPositions does not match characters " "found by iterating content" ")"); do { MOZ_CrashSequence(__null , 4410); __attribute__((nomerge)) ::abort(); } while (false); } } while (false) |
| 4410 | "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" ")", "./../../../layout/svg/SVGTextFrame.cpp", 4410); AnnotateMozCrashReason ("MOZ_ASSERT" "(" "false" ") (" "MOZ_ASSERT_UNREACHABLE: " "length of mPositions does not match characters " "found by iterating content" ")"); do { MOZ_CrashSequence(__null , 4410); __attribute__((nomerge)) ::abort(); } while (false); } } while (false); |
| 4411 | return false; |
| 4412 | } |
| 4413 | if (aForceStartOfChunk) { |
| 4414 | // Note this character as starting a new anchored chunk. |
| 4415 | mPositions[aIndex].mStartOfChunk = true; |
| 4416 | aForceStartOfChunk = false; |
| 4417 | } |
| 4418 | while (aIndex < end) { |
| 4419 | // Record whether each of these characters should start a new rendered |
| 4420 | // run. That is always the case for characters on a text path. |
| 4421 | // |
| 4422 | // Run boundaries due to rotate="" values are handled in |
| 4423 | // DoGlyphPositioning. |
| 4424 | if (aInTextPath || ShouldStartRunAtIndex(mPositions, aDeltas, aIndex)) { |
| 4425 | mPositions[aIndex].mRunBoundary = true; |
| 4426 | } |
| 4427 | aIndex++; |
| 4428 | } |
| 4429 | } |
| 4430 | return true; |
| 4431 | } |
| 4432 | |
| 4433 | // Skip past elements that aren't text content elements. |
| 4434 | if (!IsTextContentElement(aContent)) { |
| 4435 | return true; |
| 4436 | } |
| 4437 | |
| 4438 | if (aContent->IsSVGElement(nsGkAtoms::textPath)) { |
| 4439 | // Any ‘y’ attributes on horizontal <textPath> elements are ignored. |
| 4440 | // Similarly, for vertical <texPath>s x attributes are ignored. |
| 4441 | // <textPath> elements behave as if they have x="0" y="0" on them, but only |
| 4442 | // if there is not a value for the non-ignored coordinate that got inherited |
| 4443 | // from a parent. We skip this if there is no text content, so that empty |
| 4444 | // <textPath>s don't interrupt the layout of text in the parent element. |
| 4445 | if (HasTextContent(aContent)) { |
| 4446 | if (MOZ_UNLIKELY(aIndex >= mPositions.Length())(__builtin_expect(!!(aIndex >= mPositions.Length()), 0))) { |
| 4447 | 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" ")", "./../../../layout/svg/SVGTextFrame.cpp", 4449); AnnotateMozCrashReason ("MOZ_ASSERT" "(" "false" ") (" "MOZ_ASSERT_UNREACHABLE: " "length of mPositions does not match characters " "found by iterating content" ")"); do { MOZ_CrashSequence(__null , 4449); __attribute__((nomerge)) ::abort(); } while (false); } } while (false) |
| 4448 | "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" ")", "./../../../layout/svg/SVGTextFrame.cpp", 4449); AnnotateMozCrashReason ("MOZ_ASSERT" "(" "false" ") (" "MOZ_ASSERT_UNREACHABLE: " "length of mPositions does not match characters " "found by iterating content" ")"); do { MOZ_CrashSequence(__null , 4449); __attribute__((nomerge)) ::abort(); } while (false); } } while (false) |
| 4449 | "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" ")", "./../../../layout/svg/SVGTextFrame.cpp", 4449); AnnotateMozCrashReason ("MOZ_ASSERT" "(" "false" ") (" "MOZ_ASSERT_UNREACHABLE: " "length of mPositions does not match characters " "found by iterating content" ")"); do { MOZ_CrashSequence(__null , 4449); __attribute__((nomerge)) ::abort(); } while (false); } } while (false); |
| 4450 | return false; |
| 4451 | } |
| 4452 | bool vertical = GetWritingMode().IsVertical(); |
| 4453 | if (vertical || !mPositions[aIndex].IsXSpecified()) { |
| 4454 | mPositions[aIndex].mPosition.x = 0.0; |
| 4455 | } |
| 4456 | if (!vertical || !mPositions[aIndex].IsYSpecified()) { |
| 4457 | mPositions[aIndex].mPosition.y = 0.0; |
| 4458 | } |
| 4459 | mPositions[aIndex].mStartOfChunk = true; |
| 4460 | } |
| 4461 | } else if (!aContent->IsSVGElement(nsGkAtoms::a)) { |
| 4462 | 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()" , "./../../../layout/svg/SVGTextFrame.cpp", 4462); AnnotateMozCrashReason ("MOZ_ASSERT" "(" "aContent->IsSVGElement()" ")"); do { MOZ_CrashSequence (__null, 4462); __attribute__((nomerge)) ::abort(); } while ( false); } } while (false); |
| 4463 | |
| 4464 | // We have a text content element that can have x/y/dx/dy/rotate attributes. |
| 4465 | SVGElement* element = static_cast<SVGElement*>(aContent); |
| 4466 | |
| 4467 | // Get x, y, dx, dy. |
| 4468 | SVGUserUnitList x, y, dx, dy; |
| 4469 | element->GetAnimatedLengthListValues(&x, &y, &dx, &dy, nullptr); |
| 4470 | |
| 4471 | // Get rotate. |
| 4472 | const SVGNumberList* rotate = nullptr; |
| 4473 | SVGAnimatedNumberList* animatedRotate = |
| 4474 | element->GetAnimatedNumberList(nsGkAtoms::rotate); |
| 4475 | if (animatedRotate) { |
| 4476 | rotate = &animatedRotate->GetAnimValue(); |
| 4477 | } |
| 4478 | |
| 4479 | bool percentages = false; |
| 4480 | uint32_t count = GetTextContentLength(aContent); |
| 4481 | |
| 4482 | if (MOZ_UNLIKELY(aIndex + count > mPositions.Length())(__builtin_expect(!!(aIndex + count > mPositions.Length()) , 0))) { |
| 4483 | 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" ")", "./../../../layout/svg/SVGTextFrame.cpp", 4485); AnnotateMozCrashReason ("MOZ_ASSERT" "(" "false" ") (" "MOZ_ASSERT_UNREACHABLE: " "length of mPositions does not match characters " "found by iterating content" ")"); do { MOZ_CrashSequence(__null , 4485); __attribute__((nomerge)) ::abort(); } while (false); } } while (false) |
| 4484 | "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" ")", "./../../../layout/svg/SVGTextFrame.cpp", 4485); AnnotateMozCrashReason ("MOZ_ASSERT" "(" "false" ") (" "MOZ_ASSERT_UNREACHABLE: " "length of mPositions does not match characters " "found by iterating content" ")"); do { MOZ_CrashSequence(__null , 4485); __attribute__((nomerge)) ::abort(); } while (false); } } while (false) |
| 4485 | "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" ")", "./../../../layout/svg/SVGTextFrame.cpp", 4485); AnnotateMozCrashReason ("MOZ_ASSERT" "(" "false" ") (" "MOZ_ASSERT_UNREACHABLE: " "length of mPositions does not match characters " "found by iterating content" ")"); do { MOZ_CrashSequence(__null , 4485); __attribute__((nomerge)) ::abort(); } while (false); } } while (false); |
| 4486 | return false; |
| 4487 | } |
| 4488 | |
| 4489 | // New text anchoring chunks start at each character assigned a position |
| 4490 | // with x="" or y="", or if we forced one with aForceStartOfChunk due to |
| 4491 | // being just after a <textPath>. |
| 4492 | uint32_t newChunkCount = std::max(x.Length(), y.Length()); |
| 4493 | if (!newChunkCount && aForceStartOfChunk) { |
| 4494 | newChunkCount = 1; |
| 4495 | } |
| 4496 | for (uint32_t i = 0, j = 0; i < newChunkCount && j < count; j++) { |
| 4497 | if (!mPositions[aIndex + j].mUnaddressable) { |
| 4498 | mPositions[aIndex + j].mStartOfChunk = true; |
| 4499 | i++; |
| 4500 | } |
| 4501 | } |
| 4502 | |
| 4503 | // Copy dx="" and dy="" values into aDeltas. |
| 4504 | if (!dx.IsEmpty() || !dy.IsEmpty()) { |
| 4505 | // Any unspecified deltas when we grow the array just get left as 0s. |
| 4506 | aDeltas.EnsureLengthAtLeast(aIndex + count); |
| 4507 | for (uint32_t i = 0, j = 0; i < dx.Length() && j < count; j++) { |
| 4508 | if (!mPositions[aIndex + j].mUnaddressable) { |
| 4509 | aDeltas[aIndex + j].x = dx[i]; |
| 4510 | percentages = percentages || dx.HasPercentageValueAt(i); |
| 4511 | i++; |
| 4512 | } |
| 4513 | } |
| 4514 | for (uint32_t i = 0, j = 0; i < dy.Length() && j < count; j++) { |
| 4515 | if (!mPositions[aIndex + j].mUnaddressable) { |
| 4516 | aDeltas[aIndex + j].y = dy[i]; |
| 4517 | percentages = percentages || dy.HasPercentageValueAt(i); |
| 4518 | i++; |
| 4519 | } |
| 4520 | } |
| 4521 | } |
| 4522 | |
| 4523 | // Copy x="" and y="" values. |
| 4524 | for (uint32_t i = 0, j = 0; i < x.Length() && j < count; j++) { |
| 4525 | if (!mPositions[aIndex + j].mUnaddressable) { |
| 4526 | mPositions[aIndex + j].mPosition.x = x[i]; |
| 4527 | percentages = percentages || x.HasPercentageValueAt(i); |
| 4528 | i++; |
| 4529 | } |
| 4530 | } |
| 4531 | for (uint32_t i = 0, j = 0; i < y.Length() && j < count; j++) { |
| 4532 | if (!mPositions[aIndex + j].mUnaddressable) { |
| 4533 | mPositions[aIndex + j].mPosition.y = y[i]; |
| 4534 | percentages = percentages || y.HasPercentageValueAt(i); |
| 4535 | i++; |
| 4536 | } |
| 4537 | } |
| 4538 | |
| 4539 | // Copy rotate="" values. |
| 4540 | if (rotate && !rotate->IsEmpty()) { |
| 4541 | uint32_t i = 0, j = 0; |
| 4542 | while (i < rotate->Length() && j < count) { |
| 4543 | if (!mPositions[aIndex + j].mUnaddressable) { |
| 4544 | mPositions[aIndex + j].mAngle = |
| 4545 | std::numbers::pi * (*rotate)[i] / 180.0; |
| 4546 | i++; |
| 4547 | } |
| 4548 | j++; |
| 4549 | } |
| 4550 | // Propagate final rotate="" value to the end of this element. |
| 4551 | while (j < count) { |
| 4552 | mPositions[aIndex + j].mAngle = mPositions[aIndex + j - 1].mAngle; |
| 4553 | j++; |
| 4554 | } |
| 4555 | } |
| 4556 | |
| 4557 | if (percentages) { |
| 4558 | AddStateBits(NS_STATE_SVG_POSITIONING_MAY_USE_PERCENTAGES); |
| 4559 | } |
| 4560 | } |
| 4561 | |
| 4562 | // Recurse to children. |
| 4563 | bool inTextPath = aInTextPath || aContent->IsSVGElement(nsGkAtoms::textPath); |
| 4564 | for (nsIContent* child = aContent->GetFirstChild(); child; |
| 4565 | child = child->GetNextSibling()) { |
| 4566 | bool ok = ResolvePositionsForNode(child, aIndex, inTextPath, |
| 4567 | aForceStartOfChunk, aDeltas); |
| 4568 | if (!ok) { |
| 4569 | return false; |
| 4570 | } |
| 4571 | } |
| 4572 | |
| 4573 | if (aContent->IsSVGElement(nsGkAtoms::textPath)) { |
| 4574 | // Force a new anchored chunk just after a <textPath>. |
| 4575 | aForceStartOfChunk = true; |
| 4576 | } |
| 4577 | |
| 4578 | return true; |
| 4579 | } |
| 4580 | |
| 4581 | bool SVGTextFrame::ResolvePositions(nsTArray<gfxPoint>& aDeltas, |
| 4582 | bool aRunPerGlyph) { |
| 4583 | 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()", "./../../../layout/svg/SVGTextFrame.cpp" , 4583); MOZ_PretendNoReturn(); } } while (0); |
| 4584 | RemoveStateBits(NS_STATE_SVG_POSITIONING_MAY_USE_PERCENTAGES); |
| 4585 | |
| 4586 | CharIterator it(this, CharIterator::CharacterFilter::Original, |
| 4587 | /* aSubtree */ nullptr); |
| 4588 | if (it.AtEnd()) { |
| 4589 | return false; |
| 4590 | } |
| 4591 | |
| 4592 | // We assume the first character position is (0,0) unless we later see |
| 4593 | // otherwise, and note it as unaddressable if it is. |
| 4594 | bool firstCharUnaddressable = it.IsOriginalCharUnaddressable(); |
| 4595 | mPositions.AppendElement(CharPosition::Unspecified(firstCharUnaddressable)); |
| 4596 | |
| 4597 | // Fill in unspecified positions for all remaining characters, noting |
| 4598 | // them as unaddressable if they are. |
| 4599 | uint32_t index = 0; |
| 4600 | while (it.Next()) { |
| 4601 | while (++index < it.TextElementCharIndex()) { |
| 4602 | mPositions.AppendElement(CharPosition::Unspecified(false)); |
| 4603 | } |
| 4604 | mPositions.AppendElement( |
| 4605 | CharPosition::Unspecified(it.IsOriginalCharUnaddressable())); |
| 4606 | } |
| 4607 | while (++index < it.TextElementCharIndex()) { |
| 4608 | mPositions.AppendElement(CharPosition::Unspecified(false)); |
| 4609 | } |
| 4610 | |
| 4611 | // Recurse over the content and fill in character positions as we go. |
| 4612 | bool forceStartOfChunk = false; |
| 4613 | index = 0; |
| 4614 | bool ok = ResolvePositionsForNode(mContent, index, aRunPerGlyph, |
| 4615 | forceStartOfChunk, aDeltas); |
| 4616 | return ok && index > 0; |
| 4617 | } |
| 4618 | |
| 4619 | void SVGTextFrame::DetermineCharPositions(nsTArray<nsPoint>& aPositions) { |
| 4620 | 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()", "./../../../layout/svg/SVGTextFrame.cpp" , 4620); MOZ_PretendNoReturn(); } } while (0); |
| 4621 | |
| 4622 | nsPoint position; |
| 4623 | |
| 4624 | TextFrameIterator frit(this); |
| 4625 | for (nsTextFrame* frame = frit.GetCurrent(); frame; frame = frit.GetNext()) { |
| 4626 | gfxSkipCharsIterator it = frame->EnsureTextRun(nsTextFrame::eInflated); |
| 4627 | gfxTextRun* textRun = frame->GetTextRun(nsTextFrame::eInflated); |
| 4628 | auto& provider = PropertyProviderFor(frame); |
| 4629 | |
| 4630 | // Reset the position to the new frame's position. |
| 4631 | position = frit.Position(); |
| 4632 | if (textRun->IsVertical()) { |
| 4633 | if (textRun->IsInlineReversed()) { |
| 4634 | position.y += frame->GetRect().height; |
| 4635 | } |
| 4636 | position.x += GetBaselinePosition(frame, textRun, frit.DominantBaseline(), |
| 4637 | mFontSizeScaleFactor); |
| 4638 | } else { |
| 4639 | if (textRun->IsInlineReversed()) { |
| 4640 | position.x += frame->GetRect().width; |
| 4641 | } |
| 4642 | position.y += GetBaselinePosition(frame, textRun, frit.DominantBaseline(), |
| 4643 | mFontSizeScaleFactor); |
| 4644 | } |
| 4645 | |
| 4646 | // Any characters not in a frame, e.g. when display:none. |
| 4647 | for (uint32_t i = 0; i < frit.UndisplayedCharacters(); i++) { |
| 4648 | aPositions.AppendElement(position); |
| 4649 | } |
| 4650 | |
| 4651 | // Any white space characters trimmed at the start of the line of text. |
| 4652 | nsTextFrame::TrimmedOffsets trimmedOffsets = |
| 4653 | frame->GetTrimmedOffsets(frame->CharacterDataBuffer()); |
| 4654 | while (it.GetOriginalOffset() < trimmedOffsets.mStart) { |
| 4655 | aPositions.AppendElement(position); |
| 4656 | it.AdvanceOriginal(1); |
| 4657 | } |
| 4658 | |
| 4659 | // Visible characters in the text frame. |
| 4660 | while (it.GetOriginalOffset() < frame->GetContentEnd()) { |
| 4661 | aPositions.AppendElement(position); |
| 4662 | if (!it.IsOriginalCharSkipped()) { |
| 4663 | // Accumulate partial ligature advance into position. (We must get |
| 4664 | // partial advances rather than get the advance of the whole ligature |
| 4665 | // group / cluster at once, since the group may span text frames, and |
| 4666 | // the PropertyProvider only has spacing information for the current |
| 4667 | // text frame.) |
| 4668 | uint32_t offset = it.GetSkippedOffset(); |
| 4669 | nscoord advance = |
| 4670 | textRun->GetAdvanceWidth(Range(offset, offset + 1), &provider); |
| 4671 | (textRun->IsVertical() ? position.y : position.x) += |
| 4672 | textRun->IsInlineReversed() ? -advance : advance; |
| 4673 | } |
| 4674 | it.AdvanceOriginal(1); |
| 4675 | } |
| 4676 | } |
| 4677 | |
| 4678 | // Finally any characters at the end that are not in a frame. |
| 4679 | for (uint32_t i = 0; i < frit.UndisplayedCharacters(); i++) { |
| 4680 | aPositions.AppendElement(position); |
| 4681 | } |
| 4682 | |
| 4683 | // Clear any cached PropertyProvider, to avoid risk of re-using it after |
| 4684 | // style changes or other mutations may have invalidated it. |
| 4685 | ForgetCachedProvider(); |
| 4686 | } |
| 4687 | |
| 4688 | /** |
| 4689 | * Physical text-anchor values. |
| 4690 | */ |
| 4691 | enum class TextAnchorSide { Left, Middle, Right }; |
| 4692 | |
| 4693 | /** |
| 4694 | * Converts a logical text-anchor value to its physical value, based on whether |
| 4695 | * it is for an RTL frame. |
| 4696 | */ |
| 4697 | static TextAnchorSide ConvertLogicalTextAnchorToPhysical( |
| 4698 | StyleTextAnchor aTextAnchor, bool aIsRightToLeft) { |
| 4699 | 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" , "./../../../layout/svg/SVGTextFrame.cpp", 4699); MOZ_PretendNoReturn (); } } while (0); |
| 4700 | if (!aIsRightToLeft) { |
| 4701 | return TextAnchorSide(uint8_t(aTextAnchor)); |
| 4702 | } |
| 4703 | return TextAnchorSide(2 - uint8_t(aTextAnchor)); |
| 4704 | } |
| 4705 | |
| 4706 | /** |
| 4707 | * Shifts the recorded character positions for an anchored chunk. |
| 4708 | * |
| 4709 | * @param aCharPositions The recorded character positions. |
| 4710 | * @param aChunkStart The character index the starts the anchored chunk. This |
| 4711 | * character's initial position is the anchor point. |
| 4712 | * @param aChunkEnd The character index just after the end of the anchored |
| 4713 | * chunk. |
| 4714 | * @param aVisIStartEdge The left/top-most edge of any of the glyphs within the |
| 4715 | * anchored chunk. |
| 4716 | * @param aVisIEndEdge The right/bottom-most edge of any of the glyphs within |
| 4717 | * the anchored chunk. |
| 4718 | * @param aAnchorSide The direction to anchor. |
| 4719 | */ |
| 4720 | static void ShiftAnchoredChunk(nsTArray<CharPosition>& aCharPositions, |
| 4721 | uint32_t aChunkStart, uint32_t aChunkEnd, |
| 4722 | gfxFloat aVisIStartEdge, gfxFloat aVisIEndEdge, |
| 4723 | TextAnchorSide aAnchorSide, bool aVertical) { |
| 4724 | NS_ASSERTION(aVisIStartEdge <= aVisIEndEdge,do { if (!(aVisIStartEdge <= aVisIEndEdge)) { NS_DebugBreak (NS_DEBUG_ASSERTION, "unexpected anchored chunk edges", "aVisIStartEdge <= aVisIEndEdge" , "./../../../layout/svg/SVGTextFrame.cpp", 4725); MOZ_PretendNoReturn (); } } while (0) |
| 4725 | "unexpected anchored chunk edges")do { if (!(aVisIStartEdge <= aVisIEndEdge)) { NS_DebugBreak (NS_DEBUG_ASSERTION, "unexpected anchored chunk edges", "aVisIStartEdge <= aVisIEndEdge" , "./../../../layout/svg/SVGTextFrame.cpp", 4725); MOZ_PretendNoReturn (); } } while (0); |
| 4726 | NS_ASSERTION(aChunkStart < aChunkEnd,do { if (!(aChunkStart < aChunkEnd)) { NS_DebugBreak(NS_DEBUG_ASSERTION , "unexpected values for aChunkStart and aChunkEnd", "aChunkStart < aChunkEnd" , "./../../../layout/svg/SVGTextFrame.cpp", 4727); MOZ_PretendNoReturn (); } } while (0) |
| 4727 | "unexpected values for aChunkStart and aChunkEnd")do { if (!(aChunkStart < aChunkEnd)) { NS_DebugBreak(NS_DEBUG_ASSERTION , "unexpected values for aChunkStart and aChunkEnd", "aChunkStart < aChunkEnd" , "./../../../layout/svg/SVGTextFrame.cpp", 4727); MOZ_PretendNoReturn (); } } while (0); |
| 4728 | |
| 4729 | gfxFloat shift = aVertical ? aCharPositions[aChunkStart].mPosition.y |
| 4730 | : aCharPositions[aChunkStart].mPosition.x; |
| 4731 | switch (aAnchorSide) { |
| 4732 | case TextAnchorSide::Left: |
| 4733 | shift -= aVisIStartEdge; |
| 4734 | break; |
| 4735 | case TextAnchorSide::Middle: |
| 4736 | shift -= std::midpoint(aVisIStartEdge, aVisIEndEdge); |
| 4737 | break; |
| 4738 | case TextAnchorSide::Right: |
| 4739 | shift -= aVisIEndEdge; |
| 4740 | break; |
| 4741 | } |
| 4742 | |
| 4743 | if (shift != 0.0) { |
| 4744 | if (aVertical) { |
| 4745 | for (uint32_t i = aChunkStart; i < aChunkEnd; i++) { |
| 4746 | aCharPositions[i].mPosition.y += shift; |
| 4747 | } |
| 4748 | } else { |
| 4749 | for (uint32_t i = aChunkStart; i < aChunkEnd; i++) { |
| 4750 | aCharPositions[i].mPosition.x += shift; |
| 4751 | } |
| 4752 | } |
| 4753 | } |
| 4754 | } |
| 4755 | |
| 4756 | void SVGTextFrame::AdjustChunksForLineBreaks() { |
| 4757 | nsBlockFrame* block = do_QueryFrame(PrincipalChildList().FirstChild()); |
| 4758 | NS_ASSERTION(block, "expected block frame")do { if (!(block)) { NS_DebugBreak(NS_DEBUG_ASSERTION, "expected block frame" , "block", "./../../../layout/svg/SVGTextFrame.cpp", 4758); MOZ_PretendNoReturn (); } } while (0); |
| 4759 | |
| 4760 | nsBlockFrame::LineIterator line = block->LinesBegin(); |
| 4761 | |
| 4762 | CharIterator it(this, CharIterator::CharacterFilter::Original, |
| 4763 | /* aSubtree */ nullptr); |
| 4764 | while (!it.AtEnd() && line != block->LinesEnd()) { |
| 4765 | if (it.GetTextFrame() == line->mFirstChild) { |
| 4766 | mPositions[it.TextElementCharIndex()].mStartOfChunk = true; |
| 4767 | line++; |
| 4768 | } |
| 4769 | it.AdvancePastCurrentFrame(); |
| 4770 | } |
| 4771 | } |
| 4772 | |
| 4773 | void SVGTextFrame::AdjustPositionsForClusters() { |
| 4774 | nsPresContext* presContext = PresContext(); |
| 4775 | |
| 4776 | // Find all of the characters that are in the middle of a cluster or |
| 4777 | // ligature group, and adjust their positions and rotations to match |
| 4778 | // the first character of the cluster/group. |
| 4779 | // |
| 4780 | // Also move the boundaries of text rendered runs and anchored chunks to |
| 4781 | // not lie in the middle of cluster/group. |
| 4782 | |
| 4783 | // The partial advance of the current cluster or ligature group that we |
| 4784 | // have accumulated. |
| 4785 | gfxFloat partialAdvance = 0.0; |
| 4786 | |
| 4787 | CharIterator it(this, CharIterator::CharacterFilter::Unskipped, |
| 4788 | /* aSubtree */ nullptr); |
| 4789 | bool isFirst = true; |
| 4790 | while (!it.AtEnd()) { |
| 4791 | if (it.IsClusterAndLigatureGroupStart() || isFirst) { |
| 4792 | // If we're at the start of a new cluster or ligature group, reset our |
| 4793 | // accumulated partial advance. Also treat the beginning of the text as |
| 4794 | // an anchor, even if it is a combining character and therefore was |
| 4795 | // marked as being a Unicode cluster continuation. |
| 4796 | partialAdvance = 0.0; |
| 4797 | isFirst = false; |
| 4798 | } else { |
| 4799 | // Otherwise, we're in the middle of a cluster or ligature group, and |
| 4800 | // we need to use the currently accumulated partial advance to adjust |
| 4801 | // the character's position and rotation. |
| 4802 | |
| 4803 | // Find the start of the cluster/ligature group. |
| 4804 | uint32_t charIndex = it.TextElementCharIndex(); |
| 4805 | uint32_t startIndex = it.GlyphStartTextElementCharIndex(); |
| 4806 | 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" ")", "./../../../layout/svg/SVGTextFrame.cpp", 4809); 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 { MOZ_CrashSequence(__null, 4809); __attribute__((nomerge )) ::abort(); } while (false); } } while (false) |
| 4807 | "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" ")", "./../../../layout/svg/SVGTextFrame.cpp", 4809); 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 { MOZ_CrashSequence(__null, 4809); __attribute__((nomerge )) ::abort(); } while (false); } } while (false) |
| 4808 | "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" ")", "./../../../layout/svg/SVGTextFrame.cpp", 4809); 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 { MOZ_CrashSequence(__null, 4809); __attribute__((nomerge )) ::abort(); } while (false); } } while (false) |
| 4809 | "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" ")", "./../../../layout/svg/SVGTextFrame.cpp", 4809); 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 { MOZ_CrashSequence(__null, 4809); __attribute__((nomerge )) ::abort(); } while (false); } } while (false); |
| 4810 | |
| 4811 | mPositions[charIndex].mClusterOrLigatureGroupMiddle = true; |
| 4812 | |
| 4813 | // Don't allow different rotations on ligature parts. |
| 4814 | bool rotationAdjusted = false; |
| 4815 | double angle = mPositions[startIndex].mAngle; |
| 4816 | if (mPositions[charIndex].mAngle != angle) { |
| 4817 | mPositions[charIndex].mAngle = angle; |
| 4818 | rotationAdjusted = true; |
| 4819 | } |
| 4820 | |
| 4821 | // Update the character position. |
| 4822 | gfxFloat advance = partialAdvance / mFontSizeScaleFactor; |
| 4823 | const gfxTextRun* textRun = it.TextRun(); |
| 4824 | gfxPoint direction = gfxPoint(cos(angle), sin(angle)) * |
| 4825 | (textRun->IsInlineReversed() ? -1.0 : 1.0); |
| 4826 | if (textRun->IsVertical()) { |
| 4827 | std::swap(direction.x, direction.y); |
| 4828 | } |
| 4829 | mPositions[charIndex].mPosition = |
| 4830 | mPositions[startIndex].mPosition + direction * advance; |
| 4831 | |
| 4832 | // Ensure any runs that would end in the middle of a ligature now end just |
| 4833 | // after the ligature. |
| 4834 | if (mPositions[charIndex].mRunBoundary) { |
| 4835 | mPositions[charIndex].mRunBoundary = false; |
| 4836 | if (charIndex + 1 < mPositions.Length()) { |
| 4837 | mPositions[charIndex + 1].mRunBoundary = true; |
| 4838 | } |
| 4839 | } else if (rotationAdjusted) { |
| 4840 | if (charIndex + 1 < mPositions.Length()) { |
| 4841 | mPositions[charIndex + 1].mRunBoundary = true; |
| 4842 | } |
| 4843 | } |
| 4844 | |
| 4845 | // Ensure any anchored chunks that would begin in the middle of a ligature |
| 4846 | // now begin just after the ligature. |
| 4847 | if (mPositions[charIndex].mStartOfChunk) { |
| 4848 | mPositions[charIndex].mStartOfChunk = false; |
| 4849 | if (charIndex + 1 < mPositions.Length()) { |
| 4850 | mPositions[charIndex + 1].mStartOfChunk = true; |
| 4851 | } |
| 4852 | } |
| 4853 | } |
| 4854 | |
| 4855 | // Accumulate the current character's partial advance. |
| 4856 | partialAdvance += it.GetAdvance(presContext); |
| 4857 | |
| 4858 | it.Next(); |
| 4859 | } |
| 4860 | } |
| 4861 | |
| 4862 | already_AddRefed<Path> SVGTextFrame::GetTextPath(nsIFrame* aTextPathFrame) { |
| 4863 | nsIContent* content = aTextPathFrame->GetContent(); |
| 4864 | SVGTextPathElement* tp = static_cast<SVGTextPathElement*>(content); |
| 4865 | if (tp->mPath.IsRendered()) { |
| 4866 | // This is just an attribute so there's no transform that can apply |
| 4867 | // so we can just return the path directly. |
| 4868 | return tp->mPath.GetAnimValue().BuildPathForMeasuring( |
| 4869 | aTextPathFrame->Style()->EffectiveZoom().ToFloat()); |
| 4870 | } |
| 4871 | |
| 4872 | SVGGeometryElement* geomElement = |
| 4873 | SVGObserverUtils::GetAndObserveTextPathsPath(aTextPathFrame); |
| 4874 | if (!geomElement) { |
| 4875 | return nullptr; |
| 4876 | } |
| 4877 | |
| 4878 | RefPtr<Path> path = geomElement->GetOrBuildPathForMeasuring(); |
| 4879 | if (!path) { |
| 4880 | return nullptr; |
| 4881 | } |
| 4882 | |
| 4883 | // Apply the geometry element's transform if appropriate. |
| 4884 | auto matrix = geomElement->LocalTransform(); |
| 4885 | if (!matrix.IsIdentity()) { |
| 4886 | Path::Transform(path, matrix); |
| 4887 | } |
| 4888 | |
| 4889 | return path.forget(); |
| 4890 | } |
| 4891 | |
| 4892 | gfxFloat SVGTextFrame::GetOffsetScale(nsIFrame* aTextPathFrame) { |
| 4893 | nsIContent* content = aTextPathFrame->GetContent(); |
| 4894 | SVGTextPathElement* tp = static_cast<SVGTextPathElement*>(content); |
| 4895 | if (tp->mPath.IsRendered()) { |
| 4896 | // A path attribute has no pathLength or transform |
| 4897 | // so we return a unit scale. |
| 4898 | return 1.0; |
| 4899 | } |
| 4900 | |
| 4901 | SVGGeometryElement* geomElement = |
| 4902 | SVGObserverUtils::GetAndObserveTextPathsPath(aTextPathFrame); |
| 4903 | if (!geomElement) { |
| 4904 | return 1.0; |
| 4905 | } |
| 4906 | return geomElement->GetPathLengthScale( |
| 4907 | SVGGeometryElement::PathLengthScaleUsageType::TextPath); |
| 4908 | } |
| 4909 | |
| 4910 | gfxFloat SVGTextFrame::GetStartOffset(nsIFrame* aTextPathFrame) { |
| 4911 | SVGTextPathElement* tp = |
| 4912 | static_cast<SVGTextPathElement*>(aTextPathFrame->GetContent()); |
| 4913 | SVGAnimatedLength* length = |
| 4914 | &tp->mLengthAttributes[SVGTextPathElement::STARTOFFSET]; |
| 4915 | |
| 4916 | if (length->IsPercentage()) { |
| 4917 | if (!std::isfinite(GetOffsetScale(aTextPathFrame))) { |
| 4918 | // Either pathLength="0" for this path or the path has 0 length. |
| 4919 | return 0.0; |
| 4920 | } |
| 4921 | RefPtr<Path> data = GetTextPath(aTextPathFrame); |
| 4922 | return data ? length->GetAnimValInSpecifiedUnits() * data->ComputeLength() / |
| 4923 | 100.0 |
| 4924 | : 0.0; |
| 4925 | } |
| 4926 | float lengthValue = length->GetAnimValueWithZoom(tp); |
| 4927 | // If offsetScale is infinity we want to return 0 not NaN |
| 4928 | return lengthValue == 0 ? 0.0 : lengthValue * GetOffsetScale(aTextPathFrame); |
| 4929 | } |
| 4930 | |
| 4931 | void SVGTextFrame::DoTextPathLayout() { |
| 4932 | nsPresContext* context = PresContext(); |
| 4933 | |
| 4934 | CharIterator it(this, CharIterator::CharacterFilter::Original, |
| 4935 | /* aSubtree */ nullptr); |
| 4936 | while (!it.AtEnd()) { |
| 4937 | nsIFrame* textPathFrame = it.TextPathFrame(); |
| 4938 | if (!textPathFrame) { |
| 4939 | // Skip past this frame if we're not in a text path. |
| 4940 | it.AdvancePastCurrentFrame(); |
| 4941 | continue; |
| 4942 | } |
| 4943 | |
| 4944 | // Get the path itself. |
| 4945 | RefPtr<Path> path = GetTextPath(textPathFrame); |
| 4946 | if (!path) { |
| 4947 | uint32_t start = it.TextElementCharIndex(); |
| 4948 | it.AdvancePastCurrentTextPathFrame(); |
| 4949 | uint32_t end = it.TextElementCharIndex(); |
| 4950 | for (uint32_t i = start; i < end; i++) { |
| 4951 | mPositions[i].mHidden = true; |
| 4952 | } |
| 4953 | continue; |
| 4954 | } |
| 4955 | |
| 4956 | SVGTextPathElement* textPath = |
| 4957 | static_cast<SVGTextPathElement*>(textPathFrame->GetContent()); |
| 4958 | uint16_t side = |
| 4959 | textPath->EnumAttributes()[SVGTextPathElement::SIDE].GetAnimValue(); |
| 4960 | |
| 4961 | gfxFloat offset = GetStartOffset(textPathFrame); |
| 4962 | Float pathLength = path->ComputeLength(); |
| 4963 | |
| 4964 | // If the first character within the text path is in the middle of a |
| 4965 | // cluster or ligature group, just skip it and don't apply text path |
| 4966 | // positioning. |
| 4967 | while (!it.AtEnd()) { |
| 4968 | if (it.IsOriginalCharSkipped()) { |
| 4969 | it.Next(); |
| 4970 | continue; |
| 4971 | } |
| 4972 | if (it.IsClusterAndLigatureGroupStart()) { |
| 4973 | break; |
| 4974 | } |
| 4975 | it.Next(); |
| 4976 | } |
| 4977 | |
| 4978 | bool skippedEndOfTextPath = false; |
| 4979 | |
| 4980 | // Loop for each character in the text path. |
| 4981 | while (!it.AtEnd() && it.TextPathFrame() && |
| 4982 | it.TextPathFrame()->GetContent() == textPath) { |
| 4983 | // The index of the cluster or ligature group's first character. |
| 4984 | uint32_t i = it.TextElementCharIndex(); |
| 4985 | |
| 4986 | // The index of the next character of the cluster or ligature. |
| 4987 | // We track this as we loop over the characters below so that we |
| 4988 | // can detect undisplayed characters and append entries into |
| 4989 | // partialAdvances for them. |
| 4990 | uint32_t j = i + 1; |
| 4991 | |
| 4992 | 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" , "./../../../layout/svg/SVGTextFrame.cpp", 4992); AnnotateMozCrashReason ("MOZ_ASSERT" "(" "!mPositions[i].mClusterOrLigatureGroupMiddle" ")"); do { MOZ_CrashSequence(__null, 4992); __attribute__((nomerge )) ::abort(); } while (false); } } while (false); |
| 4993 | |
| 4994 | RefPtr<const gfxTextRun> textRun = it.TextRun(); |
| 4995 | bool vertical = textRun->IsVertical(); |
| 4996 | |
| 4997 | // Compute cumulative advances for each character of the cluster or |
| 4998 | // ligature group. |
| 4999 | AutoTArray<gfxFloat, 4> partialAdvances; |
| 5000 | gfxFloat partialAdvance = it.GetAdvance(context); |
| 5001 | partialAdvances.AppendElement(partialAdvance); |
| 5002 | while (it.Next()) { |
| 5003 | // Append entries for any undisplayed characters the CharIterator |
| 5004 | // skipped over. |
| 5005 | 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()", "./../../../layout/svg/SVGTextFrame.cpp" , 5005); AnnotateMozCrashReason("MOZ_ASSERT" "(" "j <= it.TextElementCharIndex()" ")"); do { MOZ_CrashSequence(__null, 5005); __attribute__((nomerge )) ::abort(); } while (false); } } while (false); |
| 5006 | while (j < it.TextElementCharIndex()) { |
| 5007 | partialAdvances.AppendElement(partialAdvance); |
| 5008 | ++j; |
| 5009 | } |
| 5010 | // This loop may end up outside of the current text path, but |
| 5011 | // that's OK; we'll consider any complete cluster or ligature |
| 5012 | // group that begins inside the text path as being affected |
| 5013 | // by it. |
| 5014 | if (it.IsOriginalCharSkipped()) { |
| 5015 | if (!it.TextPathFrame()) { |
| 5016 | skippedEndOfTextPath = true; |
| 5017 | break; |
| 5018 | } |
| 5019 | // Leave partialAdvance unchanged. |
| 5020 | } else if (it.IsClusterAndLigatureGroupStart()) { |
| 5021 | break; |
| 5022 | } else { |
| 5023 | partialAdvance += it.GetAdvance(context); |
| 5024 | } |
| 5025 | partialAdvances.AppendElement(partialAdvance); |
| 5026 | } |
| 5027 | |
| 5028 | if (!skippedEndOfTextPath) { |
| 5029 | // Any final undisplayed characters the CharIterator skipped over. |
| 5030 | 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()", "./../../../layout/svg/SVGTextFrame.cpp" , 5030); AnnotateMozCrashReason("MOZ_ASSERT" "(" "j <= it.TextElementCharIndex()" ")"); do { MOZ_CrashSequence(__null, 5030); __attribute__((nomerge )) ::abort(); } while (false); } } while (false); |
| 5031 | while (j < it.TextElementCharIndex()) { |
| 5032 | partialAdvances.AppendElement(partialAdvance); |
| 5033 | ++j; |
| 5034 | } |
| 5035 | } |
| 5036 | |
| 5037 | gfxFloat halfAdvance = |
| 5038 | partialAdvances.LastElement() / mFontSizeScaleFactor / 2.0; |
| 5039 | if (textRun->IsInlineReversed()) { |
| 5040 | halfAdvance = -halfAdvance; |
| 5041 | } |
| 5042 | gfxFloat midx = |
| 5043 | (vertical ? mPositions[i].mPosition.y : mPositions[i].mPosition.x) + |
| 5044 | halfAdvance + offset; |
| 5045 | |
| 5046 | // Hide the character if it falls off the end of the path. |
| 5047 | mPositions[i].mHidden = midx < 0 || midx > pathLength; |
| 5048 | |
| 5049 | // Position the character on the path at the right angle. |
| 5050 | Point tangent; // Unit vector tangent to the point we find. |
| 5051 | Point pt; |
| 5052 | if (side == dom::SVGTextPathElement_Binding::TEXTPATH_SIDETYPE_RIGHT) { |
| 5053 | pt = path->ComputePointAtLength(Float(pathLength - midx), &tangent); |
| 5054 | tangent = -tangent; |
| 5055 | } else { |
| 5056 | pt = path->ComputePointAtLength(Float(midx), &tangent); |
| 5057 | } |
| 5058 | Float rotation = vertical ? atan2f(-tangent.x, tangent.y) |
| 5059 | : atan2f(tangent.y, tangent.x); |
| 5060 | Point normal(-tangent.y, tangent.x); // Unit vector normal to the point. |
| 5061 | Point offsetFromPath = normal * (vertical ? -mPositions[i].mPosition.x |
| 5062 | : mPositions[i].mPosition.y); |
| 5063 | pt += offsetFromPath; |
| 5064 | mPositions[i].mPosition = |
| 5065 | ThebesPoint(pt) - ThebesPoint(tangent) * halfAdvance; |
| 5066 | mPositions[i].mAngle += rotation; |
| 5067 | Point direction = textRun->IsInlineReversed() ? -tangent : tangent; |
| 5068 | |
| 5069 | // Position any characters for a partial ligature. |
| 5070 | for (uint32_t k = i + 1; k < j; k++) { |
| 5071 | gfxPoint partialAdvance = ThebesPoint(direction) * |
| 5072 | partialAdvances[k - i] / mFontSizeScaleFactor; |
| 5073 | mPositions[k].mPosition = mPositions[i].mPosition + partialAdvance; |
| 5074 | mPositions[k].mAngle = mPositions[i].mAngle; |
| 5075 | mPositions[k].mHidden = mPositions[i].mHidden; |
| 5076 | } |
| 5077 | } |
| 5078 | } |
| 5079 | } |
| 5080 | |
| 5081 | void SVGTextFrame::DoAnchoring() { |
| 5082 | nsPresContext* presContext = PresContext(); |
| 5083 | |
| 5084 | CharIterator it(this, CharIterator::CharacterFilter::Original, |
| 5085 | /* aSubtree */ nullptr); |
| 5086 | |
| 5087 | // Don't need to worry about skipped or trimmed characters. |
| 5088 | while (!it.AtEnd() && |
| 5089 | (it.IsOriginalCharSkipped() || it.IsOriginalCharTrimmed())) { |
| 5090 | it.Next(); |
| 5091 | } |
| 5092 | |
| 5093 | bool vertical = GetWritingMode().IsVertical(); |
| 5094 | for (uint32_t start = it.TextElementCharIndex(); start < mPositions.Length(); |
| 5095 | start = it.TextElementCharIndex()) { |
| 5096 | it.AdvanceToCharacter(start); |
| 5097 | nsTextFrame* chunkFrame = it.GetTextFrame(); |
| 5098 | |
| 5099 | // Measure characters in this chunk to find the left-most and right-most |
| 5100 | // edges of all glyphs within the chunk. |
| 5101 | uint32_t index = it.TextElementCharIndex(); |
| 5102 | uint32_t end = start; |
Value stored to 'end' during its initialization is never read | |
| 5103 | gfxFloat left = std::numeric_limits<gfxFloat>::infinity(); |
| 5104 | gfxFloat right = -std::numeric_limits<gfxFloat>::infinity(); |
| 5105 | do { |
| 5106 | if (!it.IsOriginalCharSkipped() && !it.IsOriginalCharTrimmed()) { |
| 5107 | gfxFloat advance = it.GetAdvance(presContext) / mFontSizeScaleFactor; |
| 5108 | const gfxTextRun* textRun = it.TextRun(); |
| 5109 | gfxFloat pos = textRun->IsVertical() ? mPositions[index].mPosition.y |
| 5110 | : mPositions[index].mPosition.x; |
| 5111 | if (textRun->IsInlineReversed()) { |
| 5112 | left = std::min(left, pos - advance); |
| 5113 | right = std::max(right, pos); |
| 5114 | } else { |
| 5115 | left = std::min(left, pos); |
| 5116 | right = std::max(right, pos + advance); |
| 5117 | } |
| 5118 | } |
| 5119 | it.Next(); |
| 5120 | index = end = it.TextElementCharIndex(); |
| 5121 | } while (!it.AtEnd() && !mPositions[end].mStartOfChunk); |
| 5122 | |
| 5123 | if (left != std::numeric_limits<gfxFloat>::infinity()) { |
| 5124 | bool isRTL = |
| 5125 | chunkFrame->StyleVisibility()->mDirection == StyleDirection::Rtl; |
| 5126 | TextAnchorSide anchor = ConvertLogicalTextAnchorToPhysical( |
| 5127 | chunkFrame->StyleSVG()->mTextAnchor, isRTL); |
| 5128 | |
| 5129 | ShiftAnchoredChunk(mPositions, start, end, left, right, anchor, vertical); |
| 5130 | } |
| 5131 | } |
| 5132 | } |
| 5133 | |
| 5134 | void SVGTextFrame::DoGlyphPositioning() { |
| 5135 | mPositions.Clear(); |
| 5136 | RemoveStateBits(NS_STATE_SVG_POSITIONING_DIRTY); |
| 5137 | |
| 5138 | nsIFrame* kid = PrincipalChildList().FirstChild(); |
| 5139 | if (kid && kid->IsSubtreeDirty()) { |
| 5140 | 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" ")", "./../../../layout/svg/SVGTextFrame.cpp", 5140); AnnotateMozCrashReason ("MOZ_ASSERT" "(" "false" ") (" "should have already reflowed the kid" ")"); do { MOZ_CrashSequence(__null, 5140); __attribute__((nomerge )) ::abort(); } while (false); } } while (false); |
| 5141 | return; |
| 5142 | } |
| 5143 | |
| 5144 | // Since we can be called directly via GetBBoxContribution, our correspondence |
| 5145 | // may not be up to date. |
| 5146 | TextNodeCorrespondenceRecorder::RecordCorrespondence(this); |
| 5147 | |
| 5148 | // Determine the positions of each character in app units. |
| 5149 | AutoTArray<nsPoint, 64> charPositions; |
| 5150 | DetermineCharPositions(charPositions); |
| 5151 | |
| 5152 | if (charPositions.IsEmpty()) { |
| 5153 | // No characters, so nothing to do. |
| 5154 | return; |
| 5155 | } |
| 5156 | |
| 5157 | // If the textLength="" attribute was specified, then we need ResolvePositions |
| 5158 | // to record that a new run starts with each glyph. |
| 5159 | SVGTextContentElement* element = |
| 5160 | static_cast<SVGTextContentElement*>(GetContent()); |
| 5161 | SVGAnimatedLength* textLengthAttr = |
| 5162 | element->GetAnimatedLength(nsGkAtoms::textLength); |
| 5163 | uint16_t lengthAdjust = |
| 5164 | element->EnumAttributes()[SVGTextContentElement::LENGTHADJUST] |
| 5165 | .GetAnimValue(); |
| 5166 | bool adjustingTextLength = textLengthAttr->IsExplicitlySet(); |
| 5167 | float expectedTextLength = textLengthAttr->GetAnimValueWithZoom(element); |
| 5168 | |
| 5169 | if (adjustingTextLength && |
| 5170 | (expectedTextLength < 0.0f || lengthAdjust == LENGTHADJUST_UNKNOWN)) { |
| 5171 | // If textLength="" is less than zero or lengthAdjust is unknown, ignore it. |
| 5172 | adjustingTextLength = false; |
| 5173 | } |
| 5174 | |
| 5175 | // Get the x, y, dx, dy, rotate values for the subtree. |
| 5176 | AutoTArray<gfxPoint, 16> deltas; |
| 5177 | if (!ResolvePositions(deltas, adjustingTextLength)) { |
| 5178 | // If ResolvePositions returned false, it means either there were some |
| 5179 | // characters in the DOM but none of them are displayed, or there was |
| 5180 | // an error in processing mPositions. Clear out mPositions so that we don't |
| 5181 | // attempt to do any painting later. |
| 5182 | mPositions.Clear(); |
| 5183 | return; |
| 5184 | } |
| 5185 | |
| 5186 | // XXX We might be able to do less work when there is at most a single |
| 5187 | // x/y/dx/dy position. |
| 5188 | |
| 5189 | // Truncate the positioning arrays to the actual number of characters present. |
| 5190 | TruncateTo(deltas, charPositions); |
| 5191 | TruncateTo(mPositions, charPositions); |
| 5192 | |
| 5193 | // Fill in an unspecified position for the first addressable character. |
| 5194 | uint32_t first = 0; |
| 5195 | while (first + 1 < mPositions.Length() && mPositions[first].mUnaddressable) { |
| 5196 | ++first; |
| 5197 | } |
| 5198 | if (!mPositions[first].IsXSpecified()) { |
| 5199 | mPositions[first].mPosition.x = 0.0; |
| 5200 | } |
| 5201 | if (!mPositions[first].IsYSpecified()) { |
| 5202 | mPositions[first].mPosition.y = 0.0; |
| 5203 | } |
| 5204 | if (!mPositions[first].IsAngleSpecified()) { |
| 5205 | mPositions[first].mAngle = 0.0; |
| 5206 | } |
| 5207 | |
| 5208 | nsPresContext* presContext = PresContext(); |
| 5209 | bool vertical = GetWritingMode().IsVertical(); |
| 5210 | |
| 5211 | float cssPxPerDevPx = nsPresContext::AppUnitsToFloatCSSPixels( |
| 5212 | presContext->AppUnitsPerDevPixel()); |
| 5213 | double factor = cssPxPerDevPx / mFontSizeScaleFactor; |
| 5214 | |
| 5215 | // Determine how much to compress or expand glyph positions due to |
| 5216 | // textLength="" and lengthAdjust="". |
| 5217 | double adjustment = 0.0; |
| 5218 | mLengthAdjustScaleFactor = 1.0f; |
| 5219 | if (adjustingTextLength) { |
| 5220 | nscoord frameLength = |
| 5221 | vertical ? PrincipalChildList().FirstChild()->GetRect().height |
| 5222 | : PrincipalChildList().FirstChild()->GetRect().width; |
| 5223 | float actualTextLength = static_cast<float>( |
| 5224 | presContext->AppUnitsToGfxUnits(frameLength) * factor); |
| 5225 | |
| 5226 | switch (lengthAdjust) { |
| 5227 | case LENGTHADJUST_SPACINGANDGLYPHS: |
| 5228 | // Scale the glyphs and their positions. |
| 5229 | if (actualTextLength > 0) { |
| 5230 | mLengthAdjustScaleFactor = expectedTextLength / actualTextLength; |
| 5231 | } |
| 5232 | break; |
| 5233 | |
| 5234 | default: |
| 5235 | 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", "./../../../layout/svg/SVGTextFrame.cpp" , 5235); AnnotateMozCrashReason("MOZ_ASSERT" "(" "lengthAdjust == LENGTHADJUST_SPACING" ")"); do { MOZ_CrashSequence(__null, 5235); __attribute__((nomerge )) ::abort(); } while (false); } } while (false); |
| 5236 | // Just add space between each glyph. |
| 5237 | int32_t adjustableSpaces = 0; |
| 5238 | for (uint32_t i = 1; i < mPositions.Length(); i++) { |
| 5239 | if (!mPositions[i].mUnaddressable) { |
| 5240 | adjustableSpaces++; |
| 5241 | } |
| 5242 | } |
| 5243 | if (adjustableSpaces) { |
| 5244 | adjustment = |
| 5245 | (expectedTextLength - actualTextLength) / adjustableSpaces; |
| 5246 | } |
| 5247 | break; |
| 5248 | } |
| 5249 | } |
| 5250 | |
| 5251 | // Fill in any unspecified character positions based on the positions recorded |
| 5252 | // in charPositions, and also add in the dx/dy values. |
| 5253 | if (!deltas.IsEmpty()) { |
| 5254 | mPositions[0].mPosition += deltas[0]; |
| 5255 | } |
| 5256 | |
| 5257 | gfxFloat xLengthAdjustFactor = vertical ? 1.0 : mLengthAdjustScaleFactor; |
| 5258 | gfxFloat yLengthAdjustFactor = vertical ? mLengthAdjustScaleFactor : 1.0; |
| 5259 | for (uint32_t i = 1; i < mPositions.Length(); i++) { |
| 5260 | // Fill in unspecified x position. |
| 5261 | if (!mPositions[i].IsXSpecified()) { |
| 5262 | nscoord d = charPositions[i].x - charPositions[i - 1].x; |
| 5263 | mPositions[i].mPosition.x = |
| 5264 | mPositions[i - 1].mPosition.x + |
| 5265 | presContext->AppUnitsToGfxUnits(d) * factor * xLengthAdjustFactor; |
| 5266 | if (!vertical && !mPositions[i].mUnaddressable) { |
| 5267 | mPositions[i].mPosition.x += adjustment; |
| 5268 | } |
| 5269 | } |
| 5270 | // Fill in unspecified y position. |
| 5271 | if (!mPositions[i].IsYSpecified()) { |
| 5272 | nscoord d = charPositions[i].y - charPositions[i - 1].y; |
| 5273 | mPositions[i].mPosition.y = |
| 5274 | mPositions[i - 1].mPosition.y + |
| 5275 | presContext->AppUnitsToGfxUnits(d) * factor * yLengthAdjustFactor; |
| 5276 | if (vertical && !mPositions[i].mUnaddressable) { |
| 5277 | mPositions[i].mPosition.y += adjustment; |
| 5278 | } |
| 5279 | } |
| 5280 | // Add in dx/dy. |
| 5281 | if (i < deltas.Length()) { |
| 5282 | mPositions[i].mPosition += deltas[i]; |
| 5283 | } |
| 5284 | // Fill in unspecified rotation values. |
| 5285 | if (!mPositions[i].IsAngleSpecified()) { |
| 5286 | mPositions[i].mAngle = 0.0f; |
| 5287 | } |
| 5288 | } |
| 5289 | |
| 5290 | 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()" , "./../../../layout/svg/SVGTextFrame.cpp", 5290); AnnotateMozCrashReason ("MOZ_ASSERT" "(" "mPositions.Length() == charPositions.Length()" ")"); do { MOZ_CrashSequence(__null, 5290); __attribute__((nomerge )) ::abort(); } while (false); } } while (false); |
| 5291 | |
| 5292 | AdjustChunksForLineBreaks(); |
| 5293 | AdjustPositionsForClusters(); |
| 5294 | DoAnchoring(); |
| 5295 | DoTextPathLayout(); |
| 5296 | } |
| 5297 | |
| 5298 | bool SVGTextFrame::ShouldRenderAsPath(nsTextFrame* aFrame, |
| 5299 | SVGContextPaint* aContextPaint, |
| 5300 | bool& aShouldPaintSVGGlyphs) { |
| 5301 | // Rendering to a clip path. |
| 5302 | if (HasAnyStateBits(NS_STATE_SVG_CLIPPATH_CHILD)) { |
| 5303 | aShouldPaintSVGGlyphs = false; |
| 5304 | return true; |
| 5305 | } |
| 5306 | |
| 5307 | aShouldPaintSVGGlyphs = true; |
| 5308 | |
| 5309 | const nsStyleSVG* style = aFrame->StyleSVG(); |
| 5310 | |
| 5311 | // Fill is a non-solid paint or is not opaque. |
| 5312 | if (!(style->mFill.kind.IsNone() || |
| 5313 | (style->mFill.kind.IsColor() && |
| 5314 | SVGUtils::GetOpacity(style->mFillOpacity, aContextPaint) == 1.0f))) { |
| 5315 | return true; |
| 5316 | } |
| 5317 | |
| 5318 | // If we're going to need to draw a non-opaque shadow. |
| 5319 | // It's possible nsTextFrame will support non-opaque shadows in the future, |
| 5320 | // in which case this test can be removed. |
| 5321 | if (style->mFill.kind.IsColor() && aFrame->StyleText()->HasTextShadow() && |
| 5322 | NS_GET_A(style->mFill.kind.AsColor().CalcColor(*aFrame->Style()))((uint8_t)(((style->mFill.kind.AsColor().CalcColor(*aFrame ->Style())) >> 24) & 0xff)) != |
| 5323 | 0xFF) { |
| 5324 | return true; |
| 5325 | } |
| 5326 | |
| 5327 | // Text has a stroke. |
| 5328 | if (style->HasStroke()) { |
| 5329 | if (style->mStrokeWidth.IsContextValue()) { |
| 5330 | return true; |
| 5331 | } |
| 5332 | if (SVGContentUtils::CoordToFloat( |
| 5333 | static_cast<SVGElement*>(GetContent()), |
| 5334 | style->mStrokeWidth.AsLengthPercentage()) > 0) { |
| 5335 | return true; |
| 5336 | } |
| 5337 | } |
| 5338 | |
| 5339 | return false; |
| 5340 | } |
| 5341 | |
| 5342 | void SVGTextFrame::ScheduleReflowSVG() { |
| 5343 | if (HasAnyStateBits(NS_FRAME_IS_NONDISPLAY)) { |
| 5344 | ScheduleReflowSVGNonDisplayText( |
| 5345 | IntrinsicDirty::FrameAncestorsAndDescendants); |
| 5346 | } else { |
| 5347 | SVGUtils::ScheduleReflowSVG(this); |
| 5348 | } |
| 5349 | } |
| 5350 | |
| 5351 | void SVGTextFrame::NotifyGlyphMetricsChange(bool aUpdateTextCorrespondence) { |
| 5352 | if (aUpdateTextCorrespondence) { |
| 5353 | AddStateBits(NS_STATE_SVG_TEXT_CORRESPONDENCE_DIRTY); |
| 5354 | } |
| 5355 | AddStateBits(NS_STATE_SVG_POSITIONING_DIRTY); |
| 5356 | nsLayoutUtils::PostRestyleEvent(mContent->AsElement(), RestyleHint{0}, |
| 5357 | nsChangeHint_InvalidateRenderingObservers); |
| 5358 | ScheduleReflowSVG(); |
| 5359 | } |
| 5360 | |
| 5361 | void SVGTextFrame::UpdateGlyphPositioning() { |
| 5362 | nsIFrame* kid = PrincipalChildList().FirstChild(); |
| 5363 | if (!kid) { |
| 5364 | return; |
| 5365 | } |
| 5366 | |
| 5367 | if (HasAnyStateBits(NS_STATE_SVG_POSITIONING_DIRTY)) { |
| 5368 | DoGlyphPositioning(); |
| 5369 | } |
| 5370 | } |
| 5371 | |
| 5372 | void SVGTextFrame::MaybeResolveBidiForAnonymousBlockChild() { |
| 5373 | nsIFrame* kid = PrincipalChildList().FirstChild(); |
| 5374 | |
| 5375 | if (kid && kid->HasAnyStateBits(NS_BLOCK_NEEDS_BIDI_RESOLUTION) && |
| 5376 | PresContext()->BidiEnabled()) { |
| 5377 | 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" ")", "./../../../layout/svg/SVGTextFrame.cpp", 5378); AnnotateMozCrashReason ("MOZ_ASSERT" "(" "static_cast<nsBlockFrame*>(do_QueryFrame(kid))" ") (" "Expect anonymous child to be an nsBlockFrame" ")"); do { MOZ_CrashSequence(__null, 5378); __attribute__((nomerge)) :: abort(); } while (false); } } while (false) |
| 5378 | "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" ")", "./../../../layout/svg/SVGTextFrame.cpp", 5378); AnnotateMozCrashReason ("MOZ_ASSERT" "(" "static_cast<nsBlockFrame*>(do_QueryFrame(kid))" ") (" "Expect anonymous child to be an nsBlockFrame" ")"); do { MOZ_CrashSequence(__null, 5378); __attribute__((nomerge)) :: abort(); } while (false); } } while (false); |
| 5379 | nsBidiPresUtils::Resolve(static_cast<nsBlockFrame*>(kid)); |
| 5380 | } |
| 5381 | } |
| 5382 | |
| 5383 | void SVGTextFrame::MaybeReflowAnonymousBlockChild() { |
| 5384 | nsIFrame* kid = PrincipalChildList().FirstChild(); |
| 5385 | if (!kid) { |
| 5386 | return; |
| 5387 | } |
| 5388 | |
| 5389 | MOZ_ASSERT(!kid->HasAnyStateBits(NS_FRAME_IN_REFLOW),do { static_assert( mozilla::detail::AssertionConditionType< decltype(!kid->HasAnyStateBits(NS_FRAME_IN_REFLOW))>::isValid , "invalid assertion condition"); if ((__builtin_expect(!!(!( !!(!kid->HasAnyStateBits(NS_FRAME_IN_REFLOW)))), 0))) { do { } while (false); MOZ_ReportAssertionFailure("!kid->HasAnyStateBits(NS_FRAME_IN_REFLOW)" " (" "should not be in reflow when about to reflow again" ")" , "./../../../layout/svg/SVGTextFrame.cpp", 5390); AnnotateMozCrashReason ("MOZ_ASSERT" "(" "!kid->HasAnyStateBits(NS_FRAME_IN_REFLOW)" ") (" "should not be in reflow when about to reflow again" ")" ); do { MOZ_CrashSequence(__null, 5390); __attribute__((nomerge )) ::abort(); } while (false); } } while (false) |
| 5390 | "should not be in reflow when about to reflow again")do { static_assert( mozilla::detail::AssertionConditionType< decltype(!kid->HasAnyStateBits(NS_FRAME_IN_REFLOW))>::isValid , "invalid assertion condition"); if ((__builtin_expect(!!(!( !!(!kid->HasAnyStateBits(NS_FRAME_IN_REFLOW)))), 0))) { do { } while (false); MOZ_ReportAssertionFailure("!kid->HasAnyStateBits(NS_FRAME_IN_REFLOW)" " (" "should not be in reflow when about to reflow again" ")" , "./../../../layout/svg/SVGTextFrame.cpp", 5390); AnnotateMozCrashReason ("MOZ_ASSERT" "(" "!kid->HasAnyStateBits(NS_FRAME_IN_REFLOW)" ") (" "should not be in reflow when about to reflow again" ")" ); do { MOZ_CrashSequence(__null, 5390); __attribute__((nomerge )) ::abort(); } while (false); } } while (false); |
| 5391 | |
| 5392 | if (IsSubtreeDirty()) { |
| 5393 | if (HasAnyStateBits(NS_FRAME_IS_DIRTY)) { |
| 5394 | // If we require a full reflow, ensure our kid is marked fully dirty. |
| 5395 | // (Note that our anonymous nsBlockFrame is not an ISVGDisplayableFrame, |
| 5396 | // so even when we are called via our ReflowSVG this will not be done for |
| 5397 | // us by SVGDisplayContainerFrame::ReflowSVG.) |
| 5398 | kid->MarkSubtreeDirty(); |
| 5399 | } |
| 5400 | |
| 5401 | // The RecordCorrespondence and DoReflow calls can result in new text frames |
| 5402 | // being created (due to bidi resolution or reflow). We set this bit to |
| 5403 | // guard against unnecessarily calling back in to |
| 5404 | // ScheduleReflowSVGNonDisplayText from nsIFrame::DidSetComputedStyle on |
| 5405 | // those new text frames. |
| 5406 | AddStateBits(NS_STATE_SVG_TEXT_IN_REFLOW); |
| 5407 | |
| 5408 | TextNodeCorrespondenceRecorder::RecordCorrespondence(this); |
| 5409 | |
| 5410 | 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" ")", "./../../../layout/svg/SVGTextFrame.cpp" , 5411); AnnotateMozCrashReason("MOZ_ASSERT" "(" "SVGUtils::AnyOuterSVGIsCallingReflowSVG(this)" ") (" "should be under ReflowSVG" ")"); do { MOZ_CrashSequence (__null, 5411); __attribute__((nomerge)) ::abort(); } while ( false); } } while (false) |
| 5411 | "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" ")", "./../../../layout/svg/SVGTextFrame.cpp" , 5411); AnnotateMozCrashReason("MOZ_ASSERT" "(" "SVGUtils::AnyOuterSVGIsCallingReflowSVG(this)" ") (" "should be under ReflowSVG" ")"); do { MOZ_CrashSequence (__null, 5411); __attribute__((nomerge)) ::abort(); } while ( false); } } while (false); |
| 5412 | nsPresContext::InterruptPreventer noInterrupts(PresContext()); |
| 5413 | DoReflow(); |
| 5414 | |
| 5415 | RemoveStateBits(NS_STATE_SVG_TEXT_IN_REFLOW); |
| 5416 | } |
| 5417 | } |
| 5418 | |
| 5419 | void SVGTextFrame::DoReflow() { |
| 5420 | 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)" , "./../../../layout/svg/SVGTextFrame.cpp", 5420); AnnotateMozCrashReason ("MOZ_ASSERT" "(" "HasAnyStateBits(NS_STATE_SVG_TEXT_IN_REFLOW)" ")"); do { MOZ_CrashSequence(__null, 5420); __attribute__((nomerge )) ::abort(); } while (false); } } while (false); |
| 5421 | |
| 5422 | // Since we are going to reflow the anonymous block frame, we will |
| 5423 | // need to update mPositions. |
| 5424 | // We also mark our text correspondence as dirty since we can end up needing |
| 5425 | // reflow in ways that do not set NS_STATE_SVG_TEXT_CORRESPONDENCE_DIRTY. |
| 5426 | // (We'd then fail the "expected a TextNodeCorrespondenceProperty" assertion |
| 5427 | // when UpdateGlyphPositioning() is called after we return.) |
| 5428 | AddStateBits(NS_STATE_SVG_TEXT_CORRESPONDENCE_DIRTY | |
| 5429 | NS_STATE_SVG_POSITIONING_DIRTY); |
| 5430 | |
| 5431 | if (HasAnyStateBits(NS_FRAME_IS_NONDISPLAY)) { |
| 5432 | // Normally, these dirty flags would be cleared in ReflowSVG(), but that |
| 5433 | // doesn't get called for non-display frames. We don't want to reflow our |
| 5434 | // descendants every time SVGTextFrame::PaintSVG makes sure that we have |
| 5435 | // valid positions by calling UpdateGlyphPositioning(), so we need to clear |
| 5436 | // these dirty bits. Note that this also breaks an invalidation loop where |
| 5437 | // our descendants invalidate as they reflow, which invalidates rendering |
| 5438 | // observers, which reschedules the frame that is currently painting by |
| 5439 | // referencing us to paint again. See bug 839958 comment 7. Hopefully we |
| 5440 | // will break that loop more convincingly at some point. |
| 5441 | RemoveStateBits(NS_FRAME_IS_DIRTY | NS_FRAME_HAS_DIRTY_CHILDREN); |
| 5442 | } |
| 5443 | |
| 5444 | // Forget any cached measurements of one of our children. |
| 5445 | mFrameForCachedRanges = nullptr; |
| 5446 | |
| 5447 | nsPresContext* presContext = PresContext(); |
| 5448 | nsIFrame* kid = PrincipalChildList().FirstChild(); |
| 5449 | if (!kid) { |
| 5450 | return; |
| 5451 | } |
| 5452 | |
| 5453 | std::unique_ptr<gfxContext> renderingContext = |
| 5454 | presContext->PresShell()->CreateReferenceRenderingContext(); |
| 5455 | |
| 5456 | if (UpdateFontSizeScaleFactor()) { |
| 5457 | // If the font size scale factor changed, we need the block to report |
| 5458 | // an updated preferred width. |
| 5459 | kid->MarkIntrinsicISizesDirty(); |
| 5460 | } |
| 5461 | |
| 5462 | const IntrinsicSizeInput input(renderingContext.get(), Nothing(), Nothing()); |
| 5463 | nscoord inlineSize = kid->GetPrefISize(input); |
| 5464 | WritingMode wm = kid->GetWritingMode(); |
| 5465 | ReflowInput reflowInput(presContext, kid, renderingContext.get(), |
| 5466 | LogicalSize(wm, inlineSize, NS_UNCONSTRAINEDSIZE)); |
| 5467 | ReflowOutput desiredSize(reflowInput); |
| 5468 | nsReflowStatus status; |
| 5469 | |
| 5470 | 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)" , "./../../../layout/svg/SVGTextFrame.cpp", 5474); MOZ_PretendNoReturn (); } } while (0) |
| 5471 | 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)" , "./../../../layout/svg/SVGTextFrame.cpp", 5474); MOZ_PretendNoReturn (); } } while (0) |
| 5472 | 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)" , "./../../../layout/svg/SVGTextFrame.cpp", 5474); MOZ_PretendNoReturn (); } } while (0) |
| 5473 | "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)" , "./../../../layout/svg/SVGTextFrame.cpp", 5474); MOZ_PretendNoReturn (); } } while (0) |
| 5474 | "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)" , "./../../../layout/svg/SVGTextFrame.cpp", 5474); MOZ_PretendNoReturn (); } } while (0); |
| 5475 | |
| 5476 | kid->Reflow(presContext, desiredSize, reflowInput, status); |
| 5477 | kid->DidReflow(presContext, &reflowInput); |
| 5478 | kid->SetSize(wm, desiredSize.Size(wm)); |
| 5479 | } |
| 5480 | |
| 5481 | // Usable font size range in devpixels / user-units |
| 5482 | #define CLAMP_MIN_SIZE8.0 8.0 |
| 5483 | #define CLAMP_MAX_SIZE200.0 200.0 |
| 5484 | #define PRECISE_SIZE200.0 200.0 |
| 5485 | |
| 5486 | bool SVGTextFrame::UpdateFontSizeScaleFactor() { |
| 5487 | float contextScale = GetContextScale(this); |
| 5488 | mLastContextScale = contextScale; |
| 5489 | |
| 5490 | double oldFontSizeScaleFactor = mFontSizeScaleFactor; |
| 5491 | |
| 5492 | bool geometricPrecision = false; |
| 5493 | // We may need to invert a matrix with these values later. |
| 5494 | CSSCoord min = std::sqrt(std::numeric_limits<float>::max()); |
| 5495 | CSSCoord max = std::sqrt(std::numeric_limits<float>::min()); |
| 5496 | bool anyText = false; |
| 5497 | |
| 5498 | // Find the minimum and maximum font sizes used over all the |
| 5499 | // nsTextFrames. |
| 5500 | TextFrameIterator it(this); |
| 5501 | nsTextFrame* f = it.GetCurrent(); |
| 5502 | while (f) { |
| 5503 | if (!geometricPrecision) { |
| 5504 | // Unfortunately we can't treat text-rendering:geometricPrecision |
| 5505 | // separately for each text frame. |
| 5506 | geometricPrecision = f->StyleText()->mTextRendering == |
| 5507 | StyleTextRendering::Geometricprecision; |
| 5508 | } |
| 5509 | const auto& fontSize = f->StyleFont()->mFont.size; |
| 5510 | if (!fontSize.IsZero()) { |
| 5511 | min = std::min(min, fontSize.ToCSSPixels()); |
| 5512 | max = std::max(max, fontSize.ToCSSPixels()); |
| 5513 | anyText = true; |
| 5514 | } |
| 5515 | f = it.GetNext(); |
| 5516 | } |
| 5517 | |
| 5518 | if (!anyText) { |
| 5519 | // No text, so no need for scaling. |
| 5520 | mFontSizeScaleFactor = 1.0; |
| 5521 | return mFontSizeScaleFactor != oldFontSizeScaleFactor; |
| 5522 | } |
| 5523 | |
| 5524 | if (geometricPrecision) { |
| 5525 | // We want to ensure minSize is scaled to PRECISE_SIZE. |
| 5526 | mFontSizeScaleFactor = PRECISE_SIZE200.0 / min; |
| 5527 | return mFontSizeScaleFactor != oldFontSizeScaleFactor; |
| 5528 | } |
| 5529 | |
| 5530 | double minTextRunSize = min * contextScale; |
| 5531 | double maxTextRunSize = max * contextScale; |
| 5532 | |
| 5533 | if (minTextRunSize >= CLAMP_MIN_SIZE8.0 && maxTextRunSize <= CLAMP_MAX_SIZE200.0) { |
| 5534 | // We are already in the ideal font size range for all text frames, |
| 5535 | // so we only have to take into account the contextScale. |
| 5536 | mFontSizeScaleFactor = contextScale; |
| 5537 | } else if (max / min > CLAMP_MAX_SIZE200.0 / CLAMP_MIN_SIZE8.0) { |
| 5538 | // We can't scale the font sizes so that all of the text frames lie |
| 5539 | // within our ideal font size range. |
| 5540 | // Heuristically, if the maxTextRunSize is within the CLAMP_MAX_SIZE |
| 5541 | // as a reasonable value, it's likely to be the user's intent to |
| 5542 | // get a valid font for the maxTextRunSize one, we should honor it. |
| 5543 | // The same for minTextRunSize. |
| 5544 | if (maxTextRunSize <= CLAMP_MAX_SIZE200.0) { |
| 5545 | mFontSizeScaleFactor = CLAMP_MAX_SIZE200.0 / max; |
| 5546 | } else if (minTextRunSize >= CLAMP_MIN_SIZE8.0) { |
| 5547 | mFontSizeScaleFactor = CLAMP_MIN_SIZE8.0 / min; |
| 5548 | } else { |
| 5549 | // So maxTextRunSize is too big, minTextRunSize is too small, |
| 5550 | // we can't really do anything for this case, just leave it as is. |
| 5551 | mFontSizeScaleFactor = contextScale; |
| 5552 | } |
| 5553 | } else if (minTextRunSize < CLAMP_MIN_SIZE8.0) { |
| 5554 | mFontSizeScaleFactor = CLAMP_MIN_SIZE8.0 / min; |
| 5555 | } else { |
| 5556 | mFontSizeScaleFactor = CLAMP_MAX_SIZE200.0 / max; |
| 5557 | } |
| 5558 | |
| 5559 | return mFontSizeScaleFactor != oldFontSizeScaleFactor; |
| 5560 | } |
| 5561 | |
| 5562 | double SVGTextFrame::GetFontSizeScaleFactor() const { |
| 5563 | return mFontSizeScaleFactor; |
| 5564 | } |
| 5565 | |
| 5566 | /** |
| 5567 | * Take aPoint, which is in the <text> element's user space, and convert |
| 5568 | * it to the appropriate frame user space of aChildFrame according to |
| 5569 | * which rendered run the point hits. |
| 5570 | */ |
| 5571 | Point SVGTextFrame::TransformFramePointToTextChild( |
| 5572 | const Point& aPoint, const nsIFrame* aChildFrame) { |
| 5573 | 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" , "./../../../layout/svg/SVGTextFrame.cpp", 5576); MOZ_PretendNoReturn (); } } while (0) |
| 5574 | 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" , "./../../../layout/svg/SVGTextFrame.cpp", 5576); MOZ_PretendNoReturn (); } } while (0) |
| 5575 | 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" , "./../../../layout/svg/SVGTextFrame.cpp", 5576); MOZ_PretendNoReturn (); } } while (0) |
| 5576 | "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" , "./../../../layout/svg/SVGTextFrame.cpp", 5576); MOZ_PretendNoReturn (); } } while (0); |
| 5577 | |
| 5578 | UpdateGlyphPositioning(); |
| 5579 | |
| 5580 | nsPresContext* presContext = PresContext(); |
| 5581 | |
| 5582 | // Add in the mRect offset to aPoint, as that will have been taken into |
| 5583 | // account when transforming the point from the ancestor frame down |
| 5584 | // to this one. |
| 5585 | float cssPxPerDevPx = nsPresContext::AppUnitsToFloatCSSPixels( |
| 5586 | presContext->AppUnitsPerDevPixel()); |
| 5587 | float factor = AppUnitsPerCSSPixel(); |
| 5588 | Point framePosition(NSAppUnitsToFloatPixels(mRect.x, factor), |
| 5589 | NSAppUnitsToFloatPixels(mRect.y, factor)); |
| 5590 | Point pointInUserSpace = aPoint * cssPxPerDevPx + framePosition; |
| 5591 | |
| 5592 | // Find the closest rendered run for the text frames beneath aChildFrame. |
| 5593 | TextRenderedRunIterator it( |
| 5594 | this, TextRenderedRunIterator::RenderedRunFilter::AllFrames, aChildFrame); |
| 5595 | TextRenderedRun hit; |
| 5596 | gfxPoint pointInRun; |
| 5597 | nscoord dx = nscoord_MAX; |
| 5598 | nscoord dy = nscoord_MAX; |
| 5599 | for (TextRenderedRun run = it.Current(); run.mFrame; run = it.Next()) { |
| 5600 | TextRenderedRun::GeometryFlags flags( |
| 5601 | TextRenderedRun::GeometryFlag::IncludeFill, |
| 5602 | TextRenderedRun::GeometryFlag::IncludeStroke, |
| 5603 | TextRenderedRun::GeometryFlag::NoHorizontalOverflow); |
| 5604 | gfxRect runRect = run.GetRunUserSpaceRect(flags).ToThebesRect(); |
| 5605 | |
| 5606 | gfxMatrix m = run.GetTransformFromRunUserSpaceToUserSpace(presContext); |
| 5607 | if (!m.Invert()) { |
| 5608 | return aPoint; |
| 5609 | } |
| 5610 | gfxPoint pointInRunUserSpace = |
| 5611 | m.TransformPoint(ThebesPoint(pointInUserSpace)); |
| 5612 | |
| 5613 | if (runRect.Contains(pointInRunUserSpace)) { |
| 5614 | // The point was inside the rendered run's rect, so we choose it. |
| 5615 | dx = 0; |
| 5616 | dy = 0; |
| 5617 | pointInRun = pointInRunUserSpace; |
| 5618 | hit = run; |
| 5619 | } else if (nsLayoutUtils::PointIsCloserToRect(pointInRunUserSpace, runRect, |
| 5620 | dx, dy)) { |
| 5621 | // The point was closer to this rendered run's rect than any others |
| 5622 | // we've seen so far. |
| 5623 | pointInRun.x = |
| 5624 | std::clamp(pointInRunUserSpace.x.value, runRect.X(), runRect.XMost()); |
| 5625 | pointInRun.y = |
| 5626 | std::clamp(pointInRunUserSpace.y.value, runRect.Y(), runRect.YMost()); |
| 5627 | hit = run; |
| 5628 | } |
| 5629 | } |
| 5630 | |
| 5631 | if (!hit.mFrame) { |
| 5632 | // We didn't find any rendered runs for the frame. |
| 5633 | return aPoint; |
| 5634 | } |
| 5635 | |
| 5636 | // Return the point in user units relative to the nsTextFrame, |
| 5637 | // but taking into account mFontSizeScaleFactor. |
| 5638 | gfxMatrix m = hit.GetTransformFromRunUserSpaceToFrameUserSpace(presContext); |
| 5639 | m.PreScale(mFontSizeScaleFactor, mFontSizeScaleFactor); |
| 5640 | return ToPoint(m.TransformPoint(pointInRun) / cssPxPerDevPx); |
| 5641 | } |
| 5642 | |
| 5643 | /** |
| 5644 | * For each rendered run beneath aChildFrame, translate aRect from |
| 5645 | * aChildFrame to the run's text frame, transform it then into |
| 5646 | * the run's frame user space, intersect it with the run's |
| 5647 | * frame user space rect, then transform it up to user space. |
| 5648 | * The result is the union of all of these. |
| 5649 | */ |
| 5650 | gfxRect SVGTextFrame::TransformFrameRectFromTextChild( |
| 5651 | const nsRect& aRect, const nsIFrame* aChildFrame) { |
| 5652 | 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" , "./../../../layout/svg/SVGTextFrame.cpp", 5655); MOZ_PretendNoReturn (); } } while (0) |
| 5653 | 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" , "./../../../layout/svg/SVGTextFrame.cpp", 5655); MOZ_PretendNoReturn (); } } while (0) |
| 5654 | 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" , "./../../../layout/svg/SVGTextFrame.cpp", 5655); MOZ_PretendNoReturn (); } } while (0) |
| 5655 | "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" , "./../../../layout/svg/SVGTextFrame.cpp", 5655); MOZ_PretendNoReturn (); } } while (0); |
| 5656 | |
| 5657 | UpdateGlyphPositioning(); |
| 5658 | |
| 5659 | nsPresContext* presContext = PresContext(); |
| 5660 | |
| 5661 | gfxRect result; |
| 5662 | TextRenderedRunIterator it( |
| 5663 | this, TextRenderedRunIterator::RenderedRunFilter::AllFrames, aChildFrame); |
| 5664 | for (TextRenderedRun run = it.Current(); run.mFrame; run = it.Next()) { |
| 5665 | // First, translate aRect from aChildFrame to this run's frame. |
| 5666 | nsRect rectInTextFrame = aRect + aChildFrame->GetOffsetTo(run.mFrame); |
| 5667 | |
| 5668 | // Scale it into frame user space. |
| 5669 | gfxRect rectInFrameUserSpace = AppUnitsToFloatCSSPixels(rectInTextFrame); |
| 5670 | |
| 5671 | // Take into account any font size scaling |
| 5672 | rectInFrameUserSpace.Scale(1.0 / mFontSizeScaleFactor); |
| 5673 | |
| 5674 | // Intersect it with the run. |
| 5675 | TextRenderedRun::GeometryFlags flags( |
| 5676 | TextRenderedRun::GeometryFlag::IncludeFill, |
| 5677 | TextRenderedRun::GeometryFlag::IncludeStroke); |
| 5678 | |
| 5679 | if (rectInFrameUserSpace.IntersectRect( |
| 5680 | rectInFrameUserSpace, |
| 5681 | run.GetFrameUserSpaceRect(presContext, flags).ToThebesRect())) { |
| 5682 | // Transform it up to user space of the <text> |
| 5683 | gfxMatrix m = run.GetTransformFromRunUserSpaceToUserSpace(presContext); |
| 5684 | gfxRect rectInUserSpace = m.TransformRect(rectInFrameUserSpace); |
| 5685 | |
| 5686 | // Union it into the result. |
| 5687 | result.UnionRect(result, rectInUserSpace); |
| 5688 | } |
| 5689 | } |
| 5690 | |
| 5691 | // Subtract the mRect offset from the result, as our user space for |
| 5692 | // this frame is relative to the top-left of mRect. |
| 5693 | float factor = AppUnitsPerCSSPixel(); |
| 5694 | gfxPoint framePosition(NSAppUnitsToFloatPixels(mRect.x, factor), |
| 5695 | NSAppUnitsToFloatPixels(mRect.y, factor)); |
| 5696 | |
| 5697 | return result - framePosition; |
| 5698 | } |
| 5699 | |
| 5700 | Rect SVGTextFrame::TransformFrameRectFromTextChild( |
| 5701 | const Rect& aRect, const nsIFrame* aChildFrame) { |
| 5702 | nscoord appUnitsPerDevPixel = PresContext()->AppUnitsPerDevPixel(); |
| 5703 | nsRect r = LayoutDevicePixel::ToAppUnits( |
| 5704 | LayoutDeviceRect::FromUnknownRect(aRect), appUnitsPerDevPixel); |
| 5705 | gfxRect resultCssUnits = TransformFrameRectFromTextChild(r, aChildFrame); |
| 5706 | float devPixelPerCSSPixel = |
| 5707 | float(AppUnitsPerCSSPixel()) / appUnitsPerDevPixel; |
| 5708 | resultCssUnits.Scale(devPixelPerCSSPixel); |
| 5709 | return ToRect(resultCssUnits); |
| 5710 | } |
| 5711 | |
| 5712 | Point SVGTextFrame::TransformFramePointFromTextChild( |
| 5713 | const Point& aPoint, const nsIFrame* aChildFrame) { |
| 5714 | return TransformFrameRectFromTextChild(Rect(aPoint, Size(1, 1)), aChildFrame) |
| 5715 | .TopLeft(); |
| 5716 | } |
| 5717 | |
| 5718 | void SVGTextFrame::AppendDirectlyOwnedAnonBoxes( |
| 5719 | nsTArray<OwnedAnonBox>& aResult) { |
| 5720 | 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" ")", "./../../../layout/svg/SVGTextFrame.cpp", 5720); AnnotateMozCrashReason ("MOZ_ASSERT" "(" "PrincipalChildList().FirstChild()" ") (" "Must have our anon box" ")"); do { MOZ_CrashSequence(__null, 5720); __attribute__((nomerge )) ::abort(); } while (false); } } while (false); |
| 5721 | aResult.AppendElement(OwnedAnonBox(PrincipalChildList().FirstChild())); |
| 5722 | } |
| 5723 | |
| 5724 | } // namespace mozilla |