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
226
227
228
229
230
231
232
233
234
235
236
237
|
/*
* (C) 1999 Lars Knoll (knoll@kde.org)
* (C) 2000 Dirk Mueller (mueller@kde.org)
* Copyright (C) 2004, 2005, 2006, 2007, 2008, 2009 Apple Inc. All rights reserved.
*
* 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.
*
*/
#ifndef RenderText_h
#define RenderText_h
#include "core/rendering/RenderObject.h"
#include "wtf/Forward.h"
#include "wtf/PassRefPtr.h"
namespace WebCore {
class AbstractInlineTextBox;
class InlineTextBox;
class RenderText : public RenderObject {
public:
// FIXME: If the node argument is not a Text node or the string argument is
// not the content of the Text node, updating text-transform property
// doesn't re-transform the string.
RenderText(Node*, PassRefPtr<StringImpl>);
#ifndef NDEBUG
virtual ~RenderText();
#endif
virtual const char* renderName() const;
virtual bool isTextFragment() const;
virtual bool isWordBreak() const;
virtual PassRefPtr<StringImpl> originalText() const;
void extractTextBox(InlineTextBox*);
void attachTextBox(InlineTextBox*);
void removeTextBox(InlineTextBox*);
const String& text() const { return m_text; }
virtual unsigned textStartOffset() const { return 0; }
String plainText() const;
InlineTextBox* createInlineTextBox();
void dirtyLineBoxes(bool fullLayout);
virtual void absoluteRects(Vector<IntRect>&, const LayoutPoint& accumulatedOffset) const OVERRIDE FINAL;
void absoluteRectsForRange(Vector<IntRect>&, unsigned startOffset = 0, unsigned endOffset = INT_MAX, bool useSelectionHeight = false, bool* wasFixed = 0);
virtual void absoluteQuads(Vector<FloatQuad>&, bool* wasFixed) const OVERRIDE FINAL;
void absoluteQuadsForRange(Vector<FloatQuad>&, unsigned startOffset = 0, unsigned endOffset = INT_MAX, bool useSelectionHeight = false, bool* wasFixed = 0);
enum ClippingOption { NoClipping, ClipToEllipsis };
void absoluteQuads(Vector<FloatQuad>&, bool* wasFixed = 0, ClippingOption = NoClipping) const;
virtual PositionWithAffinity positionForPoint(const LayoutPoint&) OVERRIDE;
bool is8Bit() const { return m_text.is8Bit(); }
const LChar* characters8() const { return m_text.impl()->characters8(); }
const UChar* characters16() const { return m_text.impl()->characters16(); }
bool hasEmptyText() const { return m_text.isEmpty(); }
String substring(unsigned position, unsigned length) const { return m_text.substring(position, length); }
UChar characterAt(unsigned) const;
UChar uncheckedCharacterAt(unsigned) const;
UChar operator[](unsigned i) const { return uncheckedCharacterAt(i); }
unsigned textLength() const { return m_text.length(); } // non virtual implementation of length()
void positionLineBox(InlineBox*);
virtual float width(unsigned from, unsigned len, const Font&, float xPos, HashSet<const SimpleFontData*>* fallbackFonts = 0, GlyphOverflow* = 0) const;
virtual float width(unsigned from, unsigned len, float xPos, bool firstLine = false, HashSet<const SimpleFontData*>* fallbackFonts = 0, GlyphOverflow* = 0) const;
float minLogicalWidth() const;
float maxLogicalWidth() const;
void trimmedPrefWidths(float leadWidth,
float& firstLineMinWidth, bool& hasBreakableStart,
float& lastLineMinWidth, bool& hasBreakableEnd,
bool& hasBreakableChar, bool& hasBreak,
float& firstLineMaxWidth, float& lastLineMaxWidth,
float& minWidth, float& maxWidth, bool& stripFrontSpaces);
virtual IntRect linesBoundingBox() const;
LayoutRect linesVisualOverflowBoundingBox() const;
FloatPoint firstRunOrigin() const;
float firstRunX() const;
float firstRunY() const;
virtual void setText(PassRefPtr<StringImpl>, bool force = false);
void setTextWithOffset(PassRefPtr<StringImpl>, unsigned offset, unsigned len, bool force = false);
virtual void transformText();
virtual bool canBeSelectionLeaf() const { return true; }
virtual void setSelectionState(SelectionState s) OVERRIDE FINAL;
virtual LayoutRect selectionRectForRepaint(const RenderLayerModelObject* repaintContainer, bool clipToVisibleContent = true) OVERRIDE;
virtual LayoutRect localCaretRect(InlineBox*, int caretOffset, LayoutUnit* extraWidthToEndOfLine = 0);
LayoutUnit marginLeft() const { return minimumValueForLength(style()->marginLeft(), 0, view()); }
LayoutUnit marginRight() const { return minimumValueForLength(style()->marginRight(), 0, view()); }
virtual LayoutRect clippedOverflowRectForRepaint(const RenderLayerModelObject* repaintContainer) const OVERRIDE FINAL;
InlineTextBox* firstTextBox() const { return m_firstTextBox; }
InlineTextBox* lastTextBox() const { return m_lastTextBox; }
virtual int caretMinOffset() const;
virtual int caretMaxOffset() const;
unsigned renderedTextLength() const;
virtual int previousOffset(int current) const OVERRIDE FINAL;
virtual int previousOffsetForBackwardDeletion(int current) const OVERRIDE FINAL;
virtual int nextOffset(int current) const OVERRIDE FINAL;
bool containsReversedText() const { return m_containsReversedText; }
bool isSecure() const { return style()->textSecurity() != TSNONE; }
void momentarilyRevealLastTypedCharacter(unsigned lastTypedCharacterOffset);
InlineTextBox* findNextInlineTextBox(int offset, int& pos) const;
void checkConsistency() const;
bool isAllCollapsibleWhitespace() const;
bool canUseSimpleFontCodePath() const { return m_canUseSimpleFontCodePath; }
bool knownToHaveNoOverflowAndNoFallbackFonts() const { return m_knownToHaveNoOverflowAndNoFallbackFonts; }
void removeAndDestroyTextBoxes();
PassRefPtr<AbstractInlineTextBox> firstAbstractInlineTextBox();
protected:
virtual void computePreferredLogicalWidths(float leadWidth);
virtual void willBeDestroyed();
virtual void styleWillChange(StyleDifference, const RenderStyle*) OVERRIDE FINAL { }
virtual void styleDidChange(StyleDifference, const RenderStyle* oldStyle);
virtual void setTextInternal(PassRefPtr<StringImpl>);
virtual UChar previousCharacter() const;
virtual void addLayerHitTestRects(LayerHitTestRects&, const RenderLayer* currentLayer, const LayoutPoint& layerOffset, const LayoutRect& containerRect) const OVERRIDE;
virtual InlineTextBox* createTextBox(); // Subclassed by SVG.
private:
void computePreferredLogicalWidths(float leadWidth, HashSet<const SimpleFontData*>& fallbackFonts, GlyphOverflow&);
bool computeCanUseSimpleFontCodePath() const;
// Make length() private so that callers that have a RenderText*
// will use the more efficient textLength() instead, while
// callers with a RenderObject* can continue to use length().
virtual unsigned length() const OVERRIDE FINAL { return textLength(); }
virtual void paint(PaintInfo&, const LayoutPoint&) OVERRIDE FINAL { ASSERT_NOT_REACHED(); }
virtual void layout() OVERRIDE FINAL { ASSERT_NOT_REACHED(); }
virtual bool nodeAtPoint(const HitTestRequest&, HitTestResult&, const HitTestLocation&, const LayoutPoint&, HitTestAction) OVERRIDE FINAL { ASSERT_NOT_REACHED(); return false; }
void deleteTextBoxes();
bool containsOnlyWhitespace(unsigned from, unsigned len) const;
float widthFromCache(const Font&, int start, int len, float xPos, HashSet<const SimpleFontData*>* fallbackFonts, GlyphOverflow*) const;
bool isAllASCII() const { return m_isAllASCII; }
void secureText(UChar mask);
// We put the bitfield first to minimize padding on 64-bit.
bool m_hasBreakableChar : 1; // Whether or not we can be broken into multiple lines.
bool m_hasBreak : 1; // Whether or not we have a hard break (e.g., <pre> with '\n').
bool m_hasTab : 1; // Whether or not we have a variable width tab character (e.g., <pre> with '\t').
bool m_hasBreakableStart : 1;
bool m_hasBreakableEnd : 1;
bool m_hasEndWhiteSpace : 1;
bool m_linesDirty : 1; // This bit indicates that the text run has already dirtied specific
// line boxes, and this hint will enable layoutInlineChildren to avoid
// just dirtying everything when character data is modified (e.g., appended/inserted
// or removed).
bool m_containsReversedText : 1;
bool m_isAllASCII : 1;
bool m_canUseSimpleFontCodePath : 1;
mutable bool m_knownToHaveNoOverflowAndNoFallbackFonts : 1;
float m_minWidth;
float m_maxWidth;
float m_firstLineMinWidth;
float m_lastLineLineMinWidth;
String m_text;
InlineTextBox* m_firstTextBox;
InlineTextBox* m_lastTextBox;
};
inline UChar RenderText::uncheckedCharacterAt(unsigned i) const
{
ASSERT_WITH_SECURITY_IMPLICATION(i < textLength());
return is8Bit() ? characters8()[i] : characters16()[i];
}
inline UChar RenderText::characterAt(unsigned i) const
{
if (i >= textLength())
return 0;
return uncheckedCharacterAt(i);
}
DEFINE_RENDER_OBJECT_TYPE_CASTS(RenderText, isText());
#ifdef NDEBUG
inline void RenderText::checkConsistency() const
{
}
#endif
void applyTextTransform(const RenderStyle*, String&, UChar);
} // namespace WebCore
#endif // RenderText_h
|
