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
|
/*
* (C) 1999 Lars Knoll (knoll@kde.org)
* (C) 2000 Dirk Mueller (mueller@kde.org)
* Copyright (C) 2004, 2005, 2006, 2007 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.
*
*/
#include "config.h"
#include "core/rendering/RenderTextFragment.h"
#include "core/dom/FirstLetterPseudoElement.h"
#include "core/dom/PseudoElement.h"
#include "core/dom/StyleChangeReason.h"
#include "core/dom/Text.h"
#include "core/rendering/HitTestResult.h"
#include "core/rendering/RenderBlock.h"
namespace blink {
RenderTextFragment::RenderTextFragment(Node* node, StringImpl* str, int startOffset, int length)
: RenderText(node, str ? str->substring(startOffset, length) : PassRefPtr<StringImpl>(nullptr))
, m_start(startOffset)
, m_end(length)
, m_isRemainingTextRenderer(false)
, m_contentString(str)
, m_firstLetterPseudoElement(nullptr)
{
}
RenderTextFragment::RenderTextFragment(Node* node, StringImpl* str)
: RenderText(node, str)
, m_start(0)
, m_end(str ? str->length() : 0)
, m_isRemainingTextRenderer(false)
, m_contentString(str)
, m_firstLetterPseudoElement(nullptr)
{
}
RenderTextFragment::~RenderTextFragment()
{
ASSERT(!m_firstLetterPseudoElement);
}
void RenderTextFragment::destroy()
{
if (m_isRemainingTextRenderer && m_firstLetterPseudoElement)
m_firstLetterPseudoElement->setRemainingTextRenderer(nullptr);
m_firstLetterPseudoElement = nullptr;
RenderText::destroy();
}
void RenderTextFragment::trace(Visitor* visitor)
{
visitor->trace(m_firstLetterPseudoElement);
RenderText::trace(visitor);
}
PassRefPtr<StringImpl> RenderTextFragment::completeText() const
{
Text* text = associatedTextNode();
return text ? text->dataImpl() : contentString();
}
void RenderTextFragment::setContentString(StringImpl* str)
{
m_contentString = str;
setText(str);
}
PassRefPtr<StringImpl> RenderTextFragment::originalText() const
{
RefPtr<StringImpl> result = completeText();
if (!result)
return nullptr;
return result->substring(start(), end());
}
void RenderTextFragment::setText(PassRefPtr<StringImpl> text, bool force)
{
RenderText::setText(text, force);
m_start = 0;
m_end = textLength();
// If we're the remaining text from a first letter then we have to tell the
// first letter pseudo element to reattach itself so it can re-calculate the
// correct first-letter settings.
if (RenderObject* previous = previousSibling()) {
if (!previous->isPseudoElement() || !previous->node()->isFirstLetterPseudoElement())
return;
// Tell the first letter container node, and the first-letter node
// that their text content changed.
toFirstLetterPseudoElement(previous->node())->updateTextFragments();
}
}
void RenderTextFragment::setTextFragment(PassRefPtr<StringImpl> text, unsigned start, unsigned length)
{
RenderText::setText(text, false);
m_start = start;
m_end = length;
}
void RenderTextFragment::transformText()
{
// Note, we have to call RenderText::setText here because, if we use our
// version we will, potentially, screw up the first-letter settings where
// we only use portions of the string.
if (RefPtr<StringImpl> textToTransform = originalText())
RenderText::setText(textToTransform.release(), true);
}
UChar RenderTextFragment::previousCharacter() const
{
if (start()) {
StringImpl* original = completeText().get();
if (original && start() <= original->length())
return (*original)[start() - 1];
}
return RenderText::previousCharacter();
}
// If this is the renderer for a first-letter pseudoNode then we have to look
// at the node for the remaining text to find our content.
Text* RenderTextFragment::associatedTextNode() const
{
Node* node = m_isRemainingTextRenderer ? this->node() : this->firstLetterPseudoElement();
if (!node)
return nullptr;
if (node->isFirstLetterPseudoElement()) {
FirstLetterPseudoElement* pseudo = toFirstLetterPseudoElement(node);
RenderObject* nextRenderer = FirstLetterPseudoElement::firstLetterTextRenderer(*pseudo);
if (!nextRenderer)
return nullptr;
node = nextRenderer->node();
}
return (node && node->isTextNode()) ? toText(node) : nullptr;
}
} // namespace blink
|
