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
196
197
198
199
200
201
202
203
204
205
206
207
208
209
210
211
212
213
214
215
216
217
218
219
220
221
222
223
224
225
|
/**
* Copyright (C) 2006, 2007, 2014 Apple Inc. All rights reserved.
* (C) 2008 Torch Mobile Inc. All rights reserved. (http://www.torchmobile.com/)
*
* 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 "RenderTextControl.h"
#include "HTMLTextFormControlElement.h"
#include "HitTestResult.h"
#include "RenderText.h"
#include "RenderTextControlSingleLine.h"
#include "RenderTheme.h"
#include "ScrollbarTheme.h"
#include "StyleInheritedData.h"
#include "StyleProperties.h"
#include "TextControlInnerElements.h"
#include "VisiblePosition.h"
#include <wtf/unicode/CharacterNames.h>
namespace WebCore {
RenderTextControl::RenderTextControl(HTMLTextFormControlElement& element, RenderStyle&& style)
: RenderBlockFlow(element, WTFMove(style))
{
}
RenderTextControl::~RenderTextControl()
{
}
HTMLTextFormControlElement& RenderTextControl::textFormControlElement() const
{
return downcast<HTMLTextFormControlElement>(nodeForNonAnonymous());
}
TextControlInnerTextElement* RenderTextControl::innerTextElement() const
{
return textFormControlElement().innerTextElement();
}
void RenderTextControl::styleDidChange(StyleDifference diff, const RenderStyle* oldStyle)
{
RenderBlockFlow::styleDidChange(diff, oldStyle);
TextControlInnerTextElement* innerText = innerTextElement();
if (!innerText)
return;
RenderTextControlInnerBlock* innerTextRenderer = innerText->renderer();
if (innerTextRenderer) {
// We may have set the width and the height in the old style in layout().
// Reset them now to avoid getting a spurious layout hint.
innerTextRenderer->mutableStyle().setHeight(Length());
innerTextRenderer->mutableStyle().setWidth(Length());
innerTextRenderer->setStyle(textFormControlElement().createInnerTextStyle(style()));
}
textFormControlElement().updatePlaceholderVisibility();
}
int RenderTextControl::textBlockLogicalHeight() const
{
return logicalHeight() - borderAndPaddingLogicalHeight();
}
int RenderTextControl::textBlockLogicalWidth() const
{
TextControlInnerTextElement* innerText = innerTextElement();
ASSERT(innerText);
LayoutUnit unitWidth = logicalWidth() - borderAndPaddingLogicalWidth();
if (innerText->renderer())
unitWidth -= innerText->renderBox()->paddingStart() + innerText->renderBox()->paddingEnd();
return unitWidth;
}
int RenderTextControl::scrollbarThickness() const
{
// FIXME: We should get the size of the scrollbar from the RenderTheme instead.
return ScrollbarTheme::theme().scrollbarThickness();
}
RenderBox::LogicalExtentComputedValues RenderTextControl::computeLogicalHeight(LayoutUnit logicalHeight, LayoutUnit logicalTop) const
{
TextControlInnerTextElement* innerText = innerTextElement();
ASSERT(innerText);
if (RenderBox* innerTextBox = innerText->renderBox()) {
LayoutUnit nonContentHeight = innerTextBox->verticalBorderAndPaddingExtent() + innerTextBox->verticalMarginExtent();
logicalHeight = computeControlLogicalHeight(innerTextBox->lineHeight(true, HorizontalLine, PositionOfInteriorLineBoxes), nonContentHeight) + verticalBorderAndPaddingExtent();
// We are able to have a horizontal scrollbar if the overflow style is scroll, or if its auto and there's no word wrap.
if ((isHorizontalWritingMode() && (style().overflowX() == OSCROLL || (style().overflowX() == OAUTO && innerText->renderer()->style().overflowWrap() == NormalOverflowWrap)))
|| (!isHorizontalWritingMode() && (style().overflowY() == OSCROLL || (style().overflowY() == OAUTO && innerText->renderer()->style().overflowWrap() == NormalOverflowWrap))))
logicalHeight += scrollbarThickness();
}
return RenderBox::computeLogicalHeight(logicalHeight, logicalTop);
}
void RenderTextControl::hitInnerTextElement(HitTestResult& result, const LayoutPoint& pointInContainer, const LayoutPoint& accumulatedOffset)
{
TextControlInnerTextElement* innerText = innerTextElement();
if (!innerText->renderer())
return;
LayoutPoint adjustedLocation = accumulatedOffset + location();
LayoutPoint localPoint = pointInContainer - toLayoutSize(adjustedLocation + innerText->renderBox()->location()) + toLayoutSize(scrollPosition());
result.setInnerNode(innerText);
result.setInnerNonSharedNode(innerText);
result.setLocalPoint(localPoint);
}
float RenderTextControl::getAverageCharWidth()
{
float width;
if (style().fontCascade().fastAverageCharWidthIfAvailable(width))
return width;
const UChar ch = '0';
const String str = String(&ch, 1);
const FontCascade& font = style().fontCascade();
TextRun textRun = constructTextRun(str, style(), AllowTrailingExpansion);
return font.width(textRun);
}
float RenderTextControl::scaleEmToUnits(int x) const
{
// This matches the unitsPerEm value for MS Shell Dlg and Courier New from the "head" font table.
float unitsPerEm = 2048.0f;
return roundf(style().fontCascade().size() * x / unitsPerEm);
}
void RenderTextControl::computeIntrinsicLogicalWidths(LayoutUnit& minLogicalWidth, LayoutUnit& maxLogicalWidth) const
{
// Use average character width. Matches IE.
maxLogicalWidth = preferredContentLogicalWidth(const_cast<RenderTextControl*>(this)->getAverageCharWidth());
if (RenderBox* innerTextRenderBox = innerTextElement()->renderBox())
maxLogicalWidth += innerTextRenderBox->paddingStart() + innerTextRenderBox->paddingEnd();
if (!style().logicalWidth().isPercentOrCalculated())
minLogicalWidth = maxLogicalWidth;
}
void RenderTextControl::computePreferredLogicalWidths()
{
ASSERT(preferredLogicalWidthsDirty());
m_minPreferredLogicalWidth = 0;
m_maxPreferredLogicalWidth = 0;
if (style().logicalWidth().isFixed() && style().logicalWidth().value() >= 0)
m_minPreferredLogicalWidth = m_maxPreferredLogicalWidth = adjustContentBoxLogicalWidthForBoxSizing(style().logicalWidth().value());
else
computeIntrinsicLogicalWidths(m_minPreferredLogicalWidth, m_maxPreferredLogicalWidth);
if (style().logicalMinWidth().isFixed() && style().logicalMinWidth().value() > 0) {
m_maxPreferredLogicalWidth = std::max(m_maxPreferredLogicalWidth, adjustContentBoxLogicalWidthForBoxSizing(style().logicalMinWidth().value()));
m_minPreferredLogicalWidth = std::max(m_minPreferredLogicalWidth, adjustContentBoxLogicalWidthForBoxSizing(style().logicalMinWidth().value()));
}
if (style().logicalMaxWidth().isFixed()) {
m_maxPreferredLogicalWidth = std::min(m_maxPreferredLogicalWidth, adjustContentBoxLogicalWidthForBoxSizing(style().logicalMaxWidth().value()));
m_minPreferredLogicalWidth = std::min(m_minPreferredLogicalWidth, adjustContentBoxLogicalWidthForBoxSizing(style().logicalMaxWidth().value()));
}
LayoutUnit toAdd = borderAndPaddingLogicalWidth();
m_minPreferredLogicalWidth += toAdd;
m_maxPreferredLogicalWidth += toAdd;
setPreferredLogicalWidthsDirty(false);
}
void RenderTextControl::addFocusRingRects(Vector<LayoutRect>& rects, const LayoutPoint& additionalOffset, const RenderLayerModelObject*)
{
if (!size().isEmpty())
rects.append(LayoutRect(additionalOffset, size()));
}
RenderObject* RenderTextControl::layoutSpecialExcludedChild(bool relayoutChildren)
{
HTMLElement* placeholder = textFormControlElement().placeholderElement();
RenderElement* placeholderRenderer = placeholder ? placeholder->renderer() : 0;
if (!placeholderRenderer)
return 0;
if (relayoutChildren) {
// The markParents arguments should be false because this function is
// called from layout() of the parent and the placeholder layout doesn't
// affect the parent layout.
placeholderRenderer->setChildNeedsLayout(MarkOnlyThis);
}
return placeholderRenderer;
}
#if PLATFORM(IOS)
bool RenderTextControl::canScroll() const
{
Element* innerText = innerTextElement();
return innerText && innerText->renderer() && innerText->renderer()->hasOverflowClip();
}
int RenderTextControl::innerLineHeight() const
{
Element* innerText = innerTextElement();
if (innerText && innerText->renderer())
return innerText->renderer()->style().computedLineHeight();
return style().computedLineHeight();
}
#endif
} // namespace WebCore
|
