1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
31
32
33
34
35
36
37
38
39
40
41
42
43
44
45
46
47
48
49
50
51
52
53
54
55
56
57
58
59
60
61
62
63
64
65
66
67
68
69
70
71
72
73
74
75
76
77
78
79
80
81
82
83
84
85
86
87
88
89
90
91
92
93
94
95
96
97
98
99
100
101
102
103
104
105
106
107
108
109
110
111
112
113
114
115
116
117
|
/*
* 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 "LegacyInlineFlowBox.h"
#include "LineWidth.h"
#include "RenderLineBoxList.h"
#include "RenderStyleConstants.h"
#include "TrailingObjects.h"
namespace WebCore {
class BidiContext;
class FloatingObject;
class FloatWithRect;
class LegacyInlineBox;
class LegacyInlineIterator;
class LineInfo;
class LineLayoutState;
class LocalFrameViewLayoutContext;
class RenderBlockFlow;
class RenderObject;
class RenderRubyRun;
class LegacyRootInlineBox;
class VerticalPositionCache;
struct BidiStatus;
struct WordMeasurement;
template <class Run> class BidiRunList;
typedef Vector<WordMeasurement, 64> WordMeasurements;
class LegacyLineLayout {
WTF_MAKE_FAST_ALLOCATED;
public:
LegacyLineLayout(RenderBlockFlow&);
~LegacyLineLayout();
RenderLineBoxList& lineBoxes() { return m_lineBoxes; }
const RenderLineBoxList& lineBoxes() const { return m_lineBoxes; }
LegacyRootInlineBox* firstRootBox() const { return downcast<LegacyRootInlineBox>(m_lineBoxes.firstLineBox()); }
LegacyRootInlineBox* lastRootBox() const { return downcast<LegacyRootInlineBox>(m_lineBoxes.lastLineBox()); }
void layoutLineBoxes(bool relayoutChildren, LayoutUnit& repaintLogicalTop, LayoutUnit& repaintLogicalBottom);
LegacyRootInlineBox* constructLine(BidiRunList<BidiRun>&, const LineInfo&);
bool positionNewFloatOnLine(const FloatingObject& newFloat, FloatingObject* lastFloatFromPreviousLine, LineInfo&, LineWidth&);
void addOverflowFromInlineChildren();
size_t lineCount() const;
size_t lineCountUntil(const LegacyRootInlineBox*) const;
static void appendRunsForObject(BidiRunList<BidiRun>*, int start, int end, RenderObject&, InlineBidiResolver&);
static void updateLogicalWidthForAlignment(RenderBlockFlow&, const TextAlignMode&, const LegacyRootInlineBox*, BidiRun* trailingSpaceRun, float& logicalLeft, float& totalLogicalWidth, float& availableLogicalWidth, int expansionOpportunityCount);
private:
std::unique_ptr<LegacyRootInlineBox> createRootInlineBox();
LegacyRootInlineBox* createAndAppendRootInlineBox();
LegacyInlineBox* createInlineBoxForRenderer(RenderObject*, bool isOnlyRun = false);
LegacyInlineFlowBox* createLineBoxes(RenderObject*, const LineInfo&, LegacyInlineBox*);
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(LegacyRootInlineBox*, const LineInfo&, BidiRun* firstRun, BidiRun* trailingSpaceRun, bool reachedEnd, GlyphOverflowAndFallbackFontsMap&, VerticalPositionCache&, WordMeasurements&);
BidiRun* computeInlineDirectionPositionsForSegment(LegacyRootInlineBox*, const LineInfo&, TextAlignMode, float& logicalLeft, float& availableLogicalWidth, BidiRun* firstRun, BidiRun* trailingSpaceRun, GlyphOverflowAndFallbackFontsMap&, VerticalPositionCache&, WordMeasurements&);
void removeInlineBox(BidiRun&, const LegacyRootInlineBox&) const;
void computeBlockDirectionPositionsForLine(LegacyRootInlineBox*, BidiRun* firstRun, GlyphOverflowAndFallbackFontsMap& textBoxDataMap, VerticalPositionCache&);
inline BidiRun* handleTrailingSpaces(BidiRunList<BidiRun>& bidiRuns, BidiContext* currentContext);
void appendFloatingObjectToLastLine(FloatingObject&);
LegacyRootInlineBox* createLineBoxesFromBidiRuns(unsigned bidiLevel, BidiRunList<BidiRun>& bidiRuns, const LegacyInlineIterator& end, LineInfo&, VerticalPositionCache&, BidiRun* trailingSpaceRun, WordMeasurements&);
void layoutRunsAndFloats(LineLayoutState&, bool hasInlineChild);
inline const LegacyInlineIterator& restartLayoutRunsAndFloatsInRange(LayoutUnit oldLogicalHeight, LayoutUnit newLogicalHeight, FloatingObject* lastFloatFromPreviousLine, InlineBidiResolver&, const LegacyInlineIterator& oldEnd);
void layoutRunsAndFloatsInRange(LineLayoutState&, InlineBidiResolver&, const LegacyInlineIterator& cleanLineStart, const BidiStatus& cleanLineBidiStatus, unsigned consecutiveHyphenatedLines);
void reattachCleanLineFloats(LegacyRootInlineBox& cleanLine, LayoutUnit delta, bool isFirstCleanLine);
void linkToEndLineIfNeeded(LineLayoutState&);
void checkFloatInCleanLine(LegacyRootInlineBox& cleanLine, RenderBox& floatBoxOnCleanLine, FloatWithRect& matchingFloatWithRect, bool& encounteredNewFloat, bool& dirtiedByFloat);
LegacyRootInlineBox* determineStartPosition(LineLayoutState&, InlineBidiResolver&);
void determineEndPosition(LineLayoutState&, LegacyRootInlineBox* startLine, LegacyInlineIterator& cleanLineStart, BidiStatus& cleanLineBidiStatus);
bool checkPaginationAndFloatsAtEndLine(LineLayoutState&);
bool lineWidthForPaginatedLineChanged(LegacyRootInlineBox* rootBox, LayoutUnit lineDelta, RenderFragmentedFlow*) const;
bool matchedEndLine(LineLayoutState&, const InlineBidiResolver&, const LegacyInlineIterator& endLineStart, const BidiStatus& endLineStatus);
void deleteEllipsisLineBoxes();
void checkLinesForTextOverflow();
void updateFragmentForLine(LegacyRootInlineBox*) const;
const RenderStyle& style() const;
const LocalFrameViewLayoutContext& layoutContext() const;
RenderBlockFlow& m_flow;
RenderLineBoxList m_lineBoxes;
};
};
|
