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
156
157
158
159
160
161
162
163
164
165
166
167
168
169
170
171
172
173
174
175
176
177
178
179
180
181
182
183
184
185
186
187
188
189
190
191
192
193
194
195
|
/*
* 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.
*/
#include "config.h"
#include "RenderGrid.h"
#include "LayoutRepainter.h"
#include "NotImplemented.h"
#include "RenderLayer.h"
#include "RenderView.h"
namespace WebCore {
class RenderGrid::GridTrack {
public:
GridTrack()
: m_usedBreadth(0)
{
}
LayoutUnit m_usedBreadth;
};
RenderGrid::RenderGrid(Node* node)
: RenderBlock(node)
{
// All of our children must be block level.
setChildrenInline(false);
}
RenderGrid::~RenderGrid()
{
}
void RenderGrid::layoutBlock(bool relayoutChildren, LayoutUnit)
{
ASSERT(needsLayout());
if (!relayoutChildren && simplifiedLayout())
return;
// FIXME: Much of this method is boiler plate that matches RenderBox::layoutBlock and Render*FlexibleBox::layoutBlock.
// It would be nice to refactor some of the duplicate code.
LayoutRepainter repainter(*this, checkForRepaintDuringLayout());
LayoutStateMaintainer statePusher(view(), this, locationOffset(), hasTransform() || hasReflection() || style()->isFlippedBlocksWritingMode());
if (inRenderFlowThread()) {
// Regions changing widths can force us to relayout our children.
if (logicalWidthChangedInRegions())
relayoutChildren = true;
}
computeInitialRegionRangeForBlock();
LayoutSize previousSize = size();
setLogicalHeight(0);
computeLogicalWidth();
m_overflow.clear();
if (scrollsOverflow()) {
if (style()->overflowX() == OSCROLL)
layer()->setHasHorizontalScrollbar(true);
if (style()->overflowY() == OSCROLL)
layer()->setHasVerticalScrollbar(true);
}
layoutGridItems();
LayoutUnit oldClientAfterEdge = clientLogicalBottom();
computeLogicalHeight();
if (size() != previousSize)
relayoutChildren = true;
layoutPositionedObjects(relayoutChildren || isRoot());
computeRegionRangeForBlock();
computeOverflow(oldClientAfterEdge);
statePusher.pop();
updateLayerTransform();
// Update our scroll information if we're overflow:auto/scroll/hidden now that we know if
// we overflow or not.
if (hasOverflowClip())
layer()->updateScrollInfoAfterLayout();
repainter.repaintAfterLayout();
setNeedsLayout(false);
}
void RenderGrid::computedUsedBreadthOfGridTracks(TrackSizingDirection direction, Vector<GridTrack>& tracks)
{
const Vector<Length>& trackStyles = (direction == ForColumns) ? style()->gridColumns() : style()->gridRows();
for (size_t i = 0; i < trackStyles.size(); ++i) {
GridTrack track;
if (trackStyles[i].isFixed())
track.m_usedBreadth = trackStyles[i].getFloatValue();
else
notImplemented();
tracks.append(track);
}
}
void RenderGrid::layoutGridItems()
{
Vector<GridTrack> columnTracks, rowTracks;
computedUsedBreadthOfGridTracks(ForColumns, columnTracks);
// FIXME: The logical width of Grid Columns from the prior step is used in
// the formatting of Grid items in content-sized Grid Rows to determine
// their required height. We will probably need to pass columns through.
computedUsedBreadthOfGridTracks(ForRows, rowTracks);
for (RenderBox* child = firstChildBox(); child; child = child->nextSiblingBox()) {
LayoutPoint childPosition = findChildLogicalPosition(child, columnTracks, rowTracks);
// FIXME: Grid items should stretch to fill their cells. Once we
// implement grid-{column,row}-align, we can also shrink to fit. For
// now, just size as if we were a regular child.
child->layoutIfNeeded();
// FIXME: Handle border & padding on the grid element.
child->setLogicalLocation(childPosition);
}
// FIXME: Handle border & padding on the grid element.
for (size_t i = 0; i < rowTracks.size(); ++i)
setLogicalHeight(logicalHeight() + rowTracks[i].m_usedBreadth);
}
LayoutPoint RenderGrid::findChildLogicalPosition(RenderBox* child, const Vector<GridTrack>& columnTracks, const Vector<GridTrack>& rowTracks)
{
Length column = child->style()->gridItemColumn();
Length row = child->style()->gridItemRow();
// FIXME: What does a non-positive integer mean for a column/row?
if (!column.isPositive() || !row.isPositive())
return LayoutPoint();
// FIXME: Handle other values for grid-{row,column} like ranges or line names.
if (!column.isFixed() || !row.isFixed())
return LayoutPoint();
size_t columnTrack = static_cast<size_t>(column.intValue()) - 1;
size_t rowTrack = static_cast<size_t>(row.intValue()) - 1;
LayoutPoint offset;
for (size_t i = 0; i < columnTrack && i < columnTracks.size(); ++i)
offset.setX(offset.x() + columnTracks[i].m_usedBreadth);
for (size_t i = 0; i < rowTrack && i < rowTracks.size(); ++i)
offset.setY(offset.y() + rowTracks[i].m_usedBreadth);
// FIXME: Handle margins on the grid item.
return offset;
}
const char* RenderGrid::renderName() const
{
if (isFloating())
return "RenderGrid (floating)";
if (isOutOfFlowPositioned())
return "RenderGrid (positioned)";
if (isAnonymous())
return "RenderGrid (generated)";
if (isRelPositioned())
return "RenderGrid (relative positioned)";
return "RenderGrid";
}
} // namespace WebCore
|
