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
118
119
120
121
122
123
124
125
126
127
128
129
130
131
132
133
134
135
136
137
138
139
140
141
142
143
144
145
146
147
148
149
150
151
152
153
154
155
|
/*
* Copyright (C) 2011 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. ``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 COMPUTER, INC. OR
* 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.
*/
#ifndef RenderGrid_h
#define RenderGrid_h
#include "RenderBlock.h"
namespace WebCore {
class GridTrack;
class RenderGrid : public RenderBlock {
public:
RenderGrid(Element*);
virtual ~RenderGrid();
virtual const char* renderName() const OVERRIDE;
virtual void layoutBlock(bool relayoutChildren, LayoutUnit pageLogicalHeight = 0) OVERRIDE;
virtual bool avoidsFloats() const OVERRIDE { return true; }
virtual bool canCollapseAnonymousBlockChild() const OVERRIDE { return false; }
private:
virtual bool isRenderGrid() const OVERRIDE { return true; }
virtual void computeIntrinsicLogicalWidths(LayoutUnit& minLogicalWidth, LayoutUnit& maxLogicalWidth) const OVERRIDE;
virtual void computePreferredLogicalWidths() OVERRIDE;
LayoutUnit computePreferredTrackWidth(const Length&, size_t) const;
struct GridSpan {
GridSpan(size_t initialPosition, size_t finalPosition)
: initialPositionIndex(initialPosition)
, finalPositionIndex(finalPosition)
{
ASSERT(initialPositionIndex <= finalPositionIndex);
}
size_t initialPositionIndex;
size_t finalPositionIndex;
};
struct GridCoordinate {
// HashMap requires a default constuctor.
GridCoordinate()
: columns(0, 0)
, rows(0, 0)
{
}
GridCoordinate(const GridSpan& r, const GridSpan& c)
: columns(c)
, rows(r)
{
}
GridSpan columns;
GridSpan rows;
};
class GridIterator;
enum TrackSizingDirection { ForColumns, ForRows };
void computedUsedBreadthOfGridTracks(TrackSizingDirection, Vector<GridTrack>& columnTracks, Vector<GridTrack>& rowTracks);
LayoutUnit computeUsedBreadthOfMinLength(TrackSizingDirection, const Length&) const;
LayoutUnit computeUsedBreadthOfMaxLength(TrackSizingDirection, const Length&) const;
LayoutUnit computeUsedBreadthOfSpecifiedLength(TrackSizingDirection, const Length&) const;
void resolveContentBasedTrackSizingFunctions(TrackSizingDirection, Vector<GridTrack>& columnTracks, Vector<GridTrack>& rowTracks, LayoutUnit& availableLogicalSpace);
void growGrid(TrackSizingDirection);
void insertItemIntoGrid(RenderBox*, size_t rowTrack, size_t columnTrack);
void insertItemIntoGrid(RenderBox*, const GridCoordinate&);
void placeItemsOnGrid();
void placeSpecifiedMajorAxisItemsOnGrid(Vector<RenderBox*>);
void placeAutoMajorAxisItemsOnGrid(Vector<RenderBox*>);
void placeAutoMajorAxisItemOnGrid(RenderBox*);
TrackSizingDirection autoPlacementMajorAxisDirection() const;
TrackSizingDirection autoPlacementMinorAxisDirection() const;
void layoutGridItems();
void clearGrid();
typedef LayoutUnit (RenderGrid::* SizingFunction)(RenderBox*, TrackSizingDirection, Vector<GridTrack>&);
typedef LayoutUnit (GridTrack::* AccumulatorGetter)() const;
typedef void (GridTrack::* AccumulatorGrowFunction)(LayoutUnit);
typedef bool (GridTrackSize::* FilterFunction)() const;
void resolveContentBasedTrackSizingFunctionsForItems(TrackSizingDirection, Vector<GridTrack>& columnTracks, Vector<GridTrack>& rowTracks, RenderBox*, FilterFunction, SizingFunction, AccumulatorGetter, AccumulatorGrowFunction);
void distributeSpaceToTracks(Vector<GridTrack*>&, Vector<GridTrack*>* tracksForGrowthAboveMaxBreadth, AccumulatorGetter, AccumulatorGrowFunction, LayoutUnit& availableLogicalSpace);
const GridTrackSize& gridTrackSize(TrackSizingDirection, size_t) const;
size_t maximumIndexInDirection(TrackSizingDirection) const;
LayoutUnit logicalContentHeightForChild(RenderBox*, Vector<GridTrack>&);
LayoutUnit minContentForChild(RenderBox*, TrackSizingDirection, Vector<GridTrack>& columnTracks);
LayoutUnit maxContentForChild(RenderBox*, TrackSizingDirection, Vector<GridTrack>& columnTracks);
LayoutPoint findChildLogicalPosition(RenderBox*, const Vector<GridTrack>& columnTracks, const Vector<GridTrack>& rowTracks);
GridCoordinate cachedGridCoordinate(const RenderBox*) const;
GridSpan resolveGridPositionsFromAutoPlacementPosition(const RenderBox*, TrackSizingDirection, size_t) const;
PassOwnPtr<GridSpan> resolveGridPositionsFromStyle(const RenderBox*, TrackSizingDirection) const;
enum GridPositionSide {
StartSide,
EndSide,
BeforeSide,
AfterSide
};
size_t resolveGridPositionFromStyle(const GridPosition&, GridPositionSide) const;
LayoutUnit gridAreaBreadthForChild(const RenderBox* child, TrackSizingDirection, const Vector<GridTrack>&) const;
#ifndef NDEBUG
bool tracksAreWiderThanMinTrackBreadth(TrackSizingDirection, const Vector<GridTrack>&);
bool gridWasPopulated() const { return !m_grid.isEmpty() && !m_grid[0].isEmpty(); }
#endif
size_t gridColumnCount() const
{
ASSERT(gridWasPopulated());
return m_grid[0].size();
}
size_t gridRowCount() const
{
ASSERT(gridWasPopulated());
return m_grid.size();
}
Vector<Vector<Vector<RenderBox*, 1> > > m_grid;
HashMap<const RenderBox*, GridCoordinate> m_gridItemCoordinate;
};
} // namespace WebCore
#endif // RenderGrid_h
|
