1 /*
2 * Copyright (C) 1999 Lars Knoll (knoll@kde.org)
3 * (C) 1999 Antti Koivisto (koivisto@kde.org)
4 * Copyright (C) 2003, 2004, 2005, 2006, 2007, 2008, 2009 Apple Inc. All rights reserved.
5 *
6 * This library is free software; you can redistribute it and/or
7 * modify it under the terms of the GNU Library General Public
8 * License as published by the Free Software Foundation; either
9 * version 2 of the License, or (at your option) any later version.
10 *
11 * This library is distributed in the hope that it will be useful,
12 * but WITHOUT ANY WARRANTY; without even the implied warranty of
13 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
14 * Library General Public License for more details.
15 *
16 * You should have received a copy of the GNU Library General Public License
17 * along with this library; see the file COPYING.LIB. If not, write to
18 * the Free Software Foundation, Inc., 51 Franklin Street, Fifth Floor,
19 * Boston, MA 02110-1301, USA.
20 */
21
22 #include "config.h"
23 #include "CharacterData.h"
24
25 #include "CString.h"
26 #include "EventNames.h"
27 #include "ExceptionCode.h"
28 #include "MutationEvent.h"
29 #include "RenderText.h"
30
31 namespace WebCore {
32
CharacterData(Document * document,const String & text,ConstructionType type)33 CharacterData::CharacterData(Document* document, const String& text, ConstructionType type)
34 : Node(document, type)
35 , m_data(text.impl() ? text.impl() : StringImpl::empty())
36 {
37 ASSERT(type == CreateOther || type == CreateText);
38 }
39
setData(const String & data,ExceptionCode &)40 void CharacterData::setData(const String& data, ExceptionCode&)
41 {
42 StringImpl* dataImpl = data.impl() ? data.impl() : StringImpl::empty();
43 if (equal(m_data.get(), dataImpl))
44 return;
45
46 int oldLength = length();
47 RefPtr<StringImpl> oldStr = m_data;
48 m_data = dataImpl;
49
50 if ((!renderer() || !rendererIsNeeded(renderer()->style())) && attached()) {
51 detach();
52 attach();
53 } else if (renderer())
54 toRenderText(renderer())->setTextWithOffset(m_data, 0, oldLength);
55
56 dispatchModifiedEvent(oldStr.get());
57
58 document()->textRemoved(this, 0, oldLength);
59 }
60
substringData(unsigned offset,unsigned count,ExceptionCode & ec)61 String CharacterData::substringData(unsigned offset, unsigned count, ExceptionCode& ec)
62 {
63 checkCharDataOperation(offset, ec);
64 if (ec)
65 return String();
66
67 return m_data->substring(offset, count);
68 }
69
appendData(const String & arg,ExceptionCode &)70 void CharacterData::appendData(const String& arg, ExceptionCode&)
71 {
72 String newStr = m_data;
73 newStr.append(arg);
74
75 RefPtr<StringImpl> oldStr = m_data;
76 m_data = newStr.impl();
77
78 if ((!renderer() || !rendererIsNeeded(renderer()->style())) && attached()) {
79 detach();
80 attach();
81 } else if (renderer())
82 toRenderText(renderer())->setTextWithOffset(m_data, oldStr->length(), 0);
83
84 dispatchModifiedEvent(oldStr.get());
85 }
86
insertData(unsigned offset,const String & arg,ExceptionCode & ec)87 void CharacterData::insertData(unsigned offset, const String& arg, ExceptionCode& ec)
88 {
89 checkCharDataOperation(offset, ec);
90 if (ec)
91 return;
92
93 String newStr = m_data;
94 newStr.insert(arg, offset);
95
96 RefPtr<StringImpl> oldStr = m_data;
97 m_data = newStr.impl();
98
99 if ((!renderer() || !rendererIsNeeded(renderer()->style())) && attached()) {
100 detach();
101 attach();
102 } else if (renderer())
103 toRenderText(renderer())->setTextWithOffset(m_data, offset, 0);
104
105 dispatchModifiedEvent(oldStr.get());
106
107 document()->textInserted(this, offset, arg.length());
108 }
109
deleteData(unsigned offset,unsigned count,ExceptionCode & ec)110 void CharacterData::deleteData(unsigned offset, unsigned count, ExceptionCode& ec)
111 {
112 checkCharDataOperation(offset, ec);
113 if (ec)
114 return;
115
116 unsigned realCount;
117 if (offset + count > length())
118 realCount = length() - offset;
119 else
120 realCount = count;
121
122 String newStr = m_data;
123 newStr.remove(offset, realCount);
124
125 RefPtr<StringImpl> oldStr = m_data;
126 m_data = newStr.impl();
127
128 if ((!renderer() || !rendererIsNeeded(renderer()->style())) && attached()) {
129 detach();
130 attach();
131 } else if (renderer())
132 toRenderText(renderer())->setTextWithOffset(m_data, offset, count);
133
134 dispatchModifiedEvent(oldStr.get());
135
136 document()->textRemoved(this, offset, realCount);
137 }
138
replaceData(unsigned offset,unsigned count,const String & arg,ExceptionCode & ec)139 void CharacterData::replaceData(unsigned offset, unsigned count, const String& arg, ExceptionCode& ec)
140 {
141 checkCharDataOperation(offset, ec);
142 if (ec)
143 return;
144
145 unsigned realCount;
146 if (offset + count > length())
147 realCount = length() - offset;
148 else
149 realCount = count;
150
151 String newStr = m_data;
152 newStr.remove(offset, realCount);
153 newStr.insert(arg, offset);
154
155 RefPtr<StringImpl> oldStr = m_data;
156 m_data = newStr.impl();
157
158 if ((!renderer() || !rendererIsNeeded(renderer()->style())) && attached()) {
159 detach();
160 attach();
161 } else if (renderer())
162 toRenderText(renderer())->setTextWithOffset(m_data, offset, count);
163
164 dispatchModifiedEvent(oldStr.get());
165
166 // update the markers for spell checking and grammar checking
167 document()->textRemoved(this, offset, realCount);
168 document()->textInserted(this, offset, arg.length());
169 }
170
nodeValue() const171 String CharacterData::nodeValue() const
172 {
173 return m_data;
174 }
175
containsOnlyWhitespace() const176 bool CharacterData::containsOnlyWhitespace() const
177 {
178 return !m_data || m_data->containsOnlyWhitespace();
179 }
180
setNodeValue(const String & nodeValue,ExceptionCode & ec)181 void CharacterData::setNodeValue(const String& nodeValue, ExceptionCode& ec)
182 {
183 setData(nodeValue, ec);
184 }
185
dispatchModifiedEvent(StringImpl * prevValue)186 void CharacterData::dispatchModifiedEvent(StringImpl* prevValue)
187 {
188 if (parentNode())
189 parentNode()->childrenChanged();
190 if (document()->hasListenerType(Document::DOMCHARACTERDATAMODIFIED_LISTENER))
191 dispatchEvent(MutationEvent::create(eventNames().DOMCharacterDataModifiedEvent, true, 0, prevValue, m_data));
192 dispatchSubtreeModifiedEvent();
193 }
194
checkCharDataOperation(unsigned offset,ExceptionCode & ec)195 void CharacterData::checkCharDataOperation(unsigned offset, ExceptionCode& ec)
196 {
197 ec = 0;
198
199 // INDEX_SIZE_ERR: Raised if the specified offset is negative or greater than the number of 16-bit
200 // units in data.
201 if (offset > length()) {
202 ec = INDEX_SIZE_ERR;
203 return;
204 }
205 }
206
maxCharacterOffset() const207 int CharacterData::maxCharacterOffset() const
208 {
209 return static_cast<int>(length());
210 }
211
rendererIsNeeded(RenderStyle * style)212 bool CharacterData::rendererIsNeeded(RenderStyle *style)
213 {
214 if (!m_data || !length())
215 return false;
216 return Node::rendererIsNeeded(style);
217 }
218
offsetInCharacters() const219 bool CharacterData::offsetInCharacters() const
220 {
221 return true;
222 }
223
224 } // namespace WebCore
225