1 /* 2 * Copyright (C) 1999 Lars Knoll (knoll (at) kde.org) 3 * (C) 1999 Antti Koivisto (koivisto (at) 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 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 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 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 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 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 } 109 110 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 } 138 139 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 } 170 171 String CharacterData::nodeValue() const 172 { 173 return m_data; 174 } 175 176 bool CharacterData::containsOnlyWhitespace() const 177 { 178 return !m_data || m_data->containsOnlyWhitespace(); 179 } 180 181 void CharacterData::setNodeValue(const String& nodeValue, ExceptionCode& ec) 182 { 183 setData(nodeValue, ec); 184 } 185 186 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 } 194 195 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 } 206 207 int CharacterData::maxCharacterOffset() const 208 { 209 return static_cast<int>(length()); 210 } 211 212 bool CharacterData::rendererIsNeeded(RenderStyle *style) 213 { 214 if (!m_data || !length()) 215 return false; 216 return Node::rendererIsNeeded(style); 217 } 218 219 bool CharacterData::offsetInCharacters() const 220 { 221 return true; 222 } 223 224 } // namespace WebCore 225
