118 lines
6.9 KiB
C++
118 lines
6.9 KiB
C++
/*
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* Copyright (C) 2019 Apple Inc. All rights reserved.
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*
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* Redistribution and use in source and binary forms, with or without
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* modification, are permitted provided that the following conditions
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* are met:
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* 1. Redistributions of source code must retain the above copyright
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* notice, this list of conditions and the following disclaimer.
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* 2. Redistributions in binary form must reproduce the above copyright
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* notice, this list of conditions and the following disclaimer in the
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* documentation and/or other materials provided with the distribution.
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*
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* THIS SOFTWARE IS PROVIDED BY APPLE INC. AND ITS CONTRIBUTORS ``AS IS''
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* AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO,
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* THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR
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* PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL APPLE INC. OR ITS CONTRIBUTORS
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* BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR
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* CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF
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* SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS
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* INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN
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* CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE)
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* ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF
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* THE POSSIBILITY OF SUCH DAMAGE.
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*/
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#pragma once
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#include "LegacyInlineFlowBox.h"
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#include "LineWidth.h"
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#include "RenderLineBoxList.h"
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#include "RenderStyleConstants.h"
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#include "TrailingObjects.h"
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namespace WebCore {
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class BidiContext;
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class FloatingObject;
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class FloatWithRect;
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class FrameViewLayoutContext;
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class LegacyInlineBox;
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class InlineIterator;
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class LineInfo;
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class LineLayoutState;
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class RenderBlockFlow;
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class RenderObject;
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class RenderRubyRun;
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class LegacyRootInlineBox;
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class VerticalPositionCache;
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struct BidiStatus;
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struct WordMeasurement;
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template <class Run> class BidiRunList;
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typedef Vector<WordMeasurement, 64> WordMeasurements;
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class LegacyLineLayout {
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WTF_MAKE_FAST_ALLOCATED;
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public:
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LegacyLineLayout(RenderBlockFlow&);
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~LegacyLineLayout();
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RenderLineBoxList& lineBoxes() { return m_lineBoxes; }
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const RenderLineBoxList& lineBoxes() const { return m_lineBoxes; }
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LegacyRootInlineBox* firstRootBox() const { return downcast<LegacyRootInlineBox>(m_lineBoxes.firstLineBox()); }
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LegacyRootInlineBox* lastRootBox() const { return downcast<LegacyRootInlineBox>(m_lineBoxes.lastLineBox()); }
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void layoutLineBoxes(bool relayoutChildren, LayoutUnit& repaintLogicalTop, LayoutUnit& repaintLogicalBottom);
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LegacyRootInlineBox* constructLine(BidiRunList<BidiRun>&, const LineInfo&);
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bool positionNewFloatOnLine(const FloatingObject& newFloat, FloatingObject* lastFloatFromPreviousLine, LineInfo&, LineWidth&);
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void addOverflowFromInlineChildren();
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size_t lineCount() const;
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size_t lineCountUntil(const LegacyRootInlineBox*) const;
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static void appendRunsForObject(BidiRunList<BidiRun>*, int start, int end, RenderObject&, InlineBidiResolver&);
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static void updateLogicalWidthForAlignment(RenderBlockFlow&, const TextAlignMode&, const LegacyRootInlineBox*, BidiRun* trailingSpaceRun, float& logicalLeft, float& totalLogicalWidth, float& availableLogicalWidth, int expansionOpportunityCount);
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private:
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std::unique_ptr<LegacyRootInlineBox> createRootInlineBox();
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LegacyRootInlineBox* createAndAppendRootInlineBox();
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LegacyInlineBox* createInlineBoxForRenderer(RenderObject*, bool isOnlyRun = false);
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LegacyInlineFlowBox* createLineBoxes(RenderObject*, const LineInfo&, LegacyInlineBox*);
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TextAlignMode textAlignmentForLine(bool endsWithSoftBreak) const;
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void setMarginsForRubyRun(BidiRun*, RenderRubyRun&, RenderObject* previousObject, const LineInfo&);
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void updateRubyForJustifiedText(RenderRubyRun&, BidiRun&, const Vector<unsigned, 16>& expansionOpportunities, unsigned& expansionOpportunityCount, float& totalLogicalWidth, float availableLogicalWidth, size_t&);
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void computeExpansionForJustifiedText(BidiRun* firstRun, BidiRun* trailingSpaceRun, const Vector<unsigned, 16>& expansionOpportunities, unsigned expansionOpportunityCount, float totalLogicalWidth, float availableLogicalWidth);
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void computeInlineDirectionPositionsForLine(LegacyRootInlineBox*, const LineInfo&, BidiRun* firstRun, BidiRun* trailingSpaceRun, bool reachedEnd, GlyphOverflowAndFallbackFontsMap&, VerticalPositionCache&, WordMeasurements&);
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BidiRun* computeInlineDirectionPositionsForSegment(LegacyRootInlineBox*, const LineInfo&, TextAlignMode, float& logicalLeft, float& availableLogicalWidth, BidiRun* firstRun, BidiRun* trailingSpaceRun, GlyphOverflowAndFallbackFontsMap&, VerticalPositionCache&, WordMeasurements&);
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void removeInlineBox(BidiRun&, const LegacyRootInlineBox&) const;
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void computeBlockDirectionPositionsForLine(LegacyRootInlineBox*, BidiRun* firstRun, GlyphOverflowAndFallbackFontsMap& textBoxDataMap, VerticalPositionCache&);
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inline BidiRun* handleTrailingSpaces(BidiRunList<BidiRun>& bidiRuns, BidiContext* currentContext);
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void appendFloatingObjectToLastLine(FloatingObject&);
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LegacyRootInlineBox* createLineBoxesFromBidiRuns(unsigned bidiLevel, BidiRunList<BidiRun>& bidiRuns, const InlineIterator& end, LineInfo&, VerticalPositionCache&, BidiRun* trailingSpaceRun, WordMeasurements&);
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void layoutRunsAndFloats(LineLayoutState&, bool hasInlineChild);
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inline const InlineIterator& restartLayoutRunsAndFloatsInRange(LayoutUnit oldLogicalHeight, LayoutUnit newLogicalHeight, FloatingObject* lastFloatFromPreviousLine, InlineBidiResolver&, const InlineIterator& oldEnd);
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void layoutRunsAndFloatsInRange(LineLayoutState&, InlineBidiResolver&, const InlineIterator& cleanLineStart, const BidiStatus& cleanLineBidiStatus, unsigned consecutiveHyphenatedLines);
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void reattachCleanLineFloats(LegacyRootInlineBox& cleanLine, LayoutUnit delta, bool isFirstCleanLine);
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void linkToEndLineIfNeeded(LineLayoutState&);
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void checkFloatInCleanLine(LegacyRootInlineBox& cleanLine, RenderBox& floatBoxOnCleanLine, FloatWithRect& matchingFloatWithRect, bool& encounteredNewFloat, bool& dirtiedByFloat);
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LegacyRootInlineBox* determineStartPosition(LineLayoutState&, InlineBidiResolver&);
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void determineEndPosition(LineLayoutState&, LegacyRootInlineBox* startLine, InlineIterator& cleanLineStart, BidiStatus& cleanLineBidiStatus);
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bool checkPaginationAndFloatsAtEndLine(LineLayoutState&);
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bool lineWidthForPaginatedLineChanged(LegacyRootInlineBox* rootBox, LayoutUnit lineDelta, RenderFragmentedFlow*) const;
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bool matchedEndLine(LineLayoutState&, const InlineBidiResolver&, const InlineIterator& endLineStart, const BidiStatus& endLineStatus);
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void deleteEllipsisLineBoxes();
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void checkLinesForTextOverflow();
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void updateFragmentForLine(LegacyRootInlineBox*) const;
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const RenderStyle& style() const;
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const FrameViewLayoutContext& layoutContext() const;
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RenderBlockFlow& m_flow;
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RenderLineBoxList m_lineBoxes;
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};
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};
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