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
|
/*
* Copyright (C) 1999 Lars Knoll (knoll@kde.org)
* (C) 1999 Antti Koivisto (koivisto@kde.org)
* (C) 2000 Dirk Mueller (mueller@kde.org)
* Copyright (C) 2004, 2005, 2006 Apple Computer, Inc.
*
* This library is free software; you can redistribute it and/or
* modify it under the terms of the GNU Library General Public
* License as published by the Free Software Foundation; either
* version 2 of the License, or (at your option) any later version.
*
* This library is distributed in the hope that it will be useful,
* but WITHOUT ANY WARRANTY; without even the implied warranty of
* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
* Library General Public License for more details.
*
* You should have received a copy of the GNU Library General Public License
* along with this library; see the file COPYING.LIB. If not, write to
* the Free Software Foundation, Inc., 51 Franklin Street, Fifth Floor,
* Boston, MA 02110-1301, USA.
*
*/
#include "config.h"
#include "core/rendering/RenderFieldset.h"
#include "core/CSSPropertyNames.h"
#include "core/HTMLNames.h"
#include "core/html/HTMLLegendElement.h"
#include "core/paint/FieldsetPainter.h"
#include "core/rendering/PaintInfo.h"
#include "platform/graphics/GraphicsContextStateSaver.h"
using std::min;
using std::max;
namespace blink {
using namespace HTMLNames;
RenderFieldset::RenderFieldset(Element* element)
: RenderBlockFlow(element)
{
}
void RenderFieldset::computePreferredLogicalWidths()
{
RenderBlockFlow::computePreferredLogicalWidths();
if (RenderBox* legend = findLegend()) {
int legendMinWidth = legend->minPreferredLogicalWidth();
Length legendMarginLeft = legend->style()->marginLeft();
Length legendMarginRight = legend->style()->marginLeft();
if (legendMarginLeft.isFixed())
legendMinWidth += legendMarginLeft.value();
if (legendMarginRight.isFixed())
legendMinWidth += legendMarginRight.value();
m_minPreferredLogicalWidth = max(m_minPreferredLogicalWidth, legendMinWidth + borderAndPaddingWidth());
}
}
RenderObject* RenderFieldset::layoutSpecialExcludedChild(bool relayoutChildren, SubtreeLayoutScope&)
{
RenderBox* legend = findLegend();
if (legend) {
if (relayoutChildren)
legend->setNeedsLayoutAndFullPaintInvalidation();
legend->layoutIfNeeded();
LayoutUnit logicalLeft;
if (style()->isLeftToRightDirection()) {
switch (legend->style()->textAlign()) {
case CENTER:
logicalLeft = (logicalWidth() - logicalWidthForChild(*legend)) / 2;
break;
case RIGHT:
logicalLeft = logicalWidth() - borderEnd() - paddingEnd() - logicalWidthForChild(*legend);
break;
default:
logicalLeft = borderStart() + paddingStart() + marginStartForChild(*legend);
break;
}
} else {
switch (legend->style()->textAlign()) {
case LEFT:
logicalLeft = borderStart() + paddingStart();
break;
case CENTER: {
// Make sure that the extra pixel goes to the end side in RTL (since it went to the end side
// in LTR).
LayoutUnit centeredWidth = logicalWidth() - logicalWidthForChild(*legend);
logicalLeft = centeredWidth - centeredWidth / 2;
break;
}
default:
logicalLeft = logicalWidth() - borderStart() - paddingStart() - marginStartForChild(*legend) - logicalWidthForChild(*legend);
break;
}
}
setLogicalLeftForChild(*legend, logicalLeft);
LayoutUnit fieldsetBorderBefore = borderBefore();
LayoutUnit legendLogicalHeight = logicalHeightForChild(*legend);
LayoutUnit legendLogicalTop;
LayoutUnit collapsedLegendExtent;
// FIXME: We need to account for the legend's margin before too.
if (fieldsetBorderBefore > legendLogicalHeight) {
// The <legend> is smaller than the associated fieldset before border
// so the latter determines positioning of the <legend>. The sizing depends
// on the legend's margins as we want to still follow the author's cues.
// Firefox completely ignores the margins in this case which seems wrong.
legendLogicalTop = (fieldsetBorderBefore - legendLogicalHeight) / 2;
collapsedLegendExtent = max<LayoutUnit>(fieldsetBorderBefore, legendLogicalTop + legendLogicalHeight + marginAfterForChild(*legend));
} else {
collapsedLegendExtent = legendLogicalHeight + marginAfterForChild(*legend);
}
setLogicalTopForChild(*legend, legendLogicalTop);
setLogicalHeight(paddingBefore() + collapsedLegendExtent);
}
return legend;
}
RenderBox* RenderFieldset::findLegend(FindLegendOption option) const
{
for (RenderObject* legend = firstChild(); legend; legend = legend->nextSibling()) {
if (option == IgnoreFloatingOrOutOfFlow && legend->isFloatingOrOutOfFlowPositioned())
continue;
if (isHTMLLegendElement(legend->node()))
return toRenderBox(legend);
}
return 0;
}
void RenderFieldset::paintBoxDecorationBackground(const PaintInfo& paintInfo, const LayoutPoint& paintOffset)
{
FieldsetPainter(*this).paintBoxDecorationBackground(paintInfo, paintOffset);
}
void RenderFieldset::paintMask(const PaintInfo& paintInfo, const LayoutPoint& paintOffset)
{
FieldsetPainter(*this).paintMask(paintInfo, paintOffset);
}
} // namespace blink
|
