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