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 "Document.h" 26#include "EventNames.h" 27#include "ExceptionCode.h" 28#include "FrameSelection.h" 29#include "InspectorInstrumentation.h" 30#include "MutationEvent.h" 31#include "MutationObserverInterestGroup.h" 32#include "MutationRecord.h" 33#include "NodeRenderingContext.h" 34#include "RenderText.h" 35#include "StyleInheritedData.h" 36#include "Text.h" 37#include "TextBreakIterator.h" 38 39using namespace std; 40 41namespace WebCore { 42 43void CharacterData::setData(const String& data, ExceptionCode&) 44{ 45 const String& nonNullData = !data.isNull() ? data : emptyString(); 46 if (m_data == nonNullData) 47 return; 48 49 RefPtr<CharacterData> protect = this; 50 51 unsigned oldLength = length(); 52 53 setDataAndUpdate(nonNullData, 0, oldLength, nonNullData.length()); 54 document()->textRemoved(this, 0, oldLength); 55} 56 57String CharacterData::substringData(unsigned offset, unsigned count, ExceptionCode& ec) 58{ 59 checkCharDataOperation(offset, ec); 60 if (ec) 61 return String(); 62 63 return m_data.substring(offset, count); 64} 65 66unsigned CharacterData::parserAppendData(const String& string, unsigned offset, unsigned lengthLimit) 67{ 68 unsigned oldLength = m_data.length(); 69 70 ASSERT(lengthLimit >= oldLength); 71 72 unsigned characterLength = string.length() - offset; 73 unsigned characterLengthLimit = min(characterLength, lengthLimit - oldLength); 74 75 // Check that we are not on an unbreakable boundary. 76 // Some text break iterator implementations work best if the passed buffer is as small as possible, 77 // see <https://bugs.webkit.org/show_bug.cgi?id=29092>. 78 // We need at least two characters look-ahead to account for UTF-16 surrogates. 79 if (characterLengthLimit < characterLength) { 80 NonSharedCharacterBreakIterator it(string.characters() + offset, (characterLengthLimit + 2 > characterLength) ? characterLength : characterLengthLimit + 2); 81 if (!isTextBreak(it, characterLengthLimit)) 82 characterLengthLimit = textBreakPreceding(it, characterLengthLimit); 83 } 84 85 if (!characterLengthLimit) 86 return 0; 87 88 if (string.is8Bit()) 89 m_data.append(string.characters8() + offset, characterLengthLimit); 90 else 91 m_data.append(string.characters16() + offset, characterLengthLimit); 92 93 ASSERT(!renderer() || isTextNode()); 94 if (isTextNode()) 95 toText(this)->updateTextRenderer(oldLength, 0); 96 97 document()->incDOMTreeVersion(); 98 // We don't call dispatchModifiedEvent here because we don't want the 99 // parser to dispatch DOM mutation events. 100 if (parentNode()) 101 parentNode()->childrenChanged(); 102 103 return characterLengthLimit; 104} 105 106void CharacterData::appendData(const String& data, ExceptionCode&) 107{ 108 String newStr = m_data; 109 newStr.append(data); 110 111 setDataAndUpdate(newStr, m_data.length(), 0, data.length()); 112 113 // FIXME: Should we call textInserted here? 114} 115 116void CharacterData::insertData(unsigned offset, const String& data, ExceptionCode& ec) 117{ 118 checkCharDataOperation(offset, ec); 119 if (ec) 120 return; 121 122 String newStr = m_data; 123 newStr.insert(data, offset); 124 125 setDataAndUpdate(newStr, offset, 0, data.length()); 126 127 document()->textInserted(this, offset, data.length()); 128} 129 130void CharacterData::deleteData(unsigned offset, unsigned count, ExceptionCode& ec) 131{ 132 checkCharDataOperation(offset, ec); 133 if (ec) 134 return; 135 136 unsigned realCount; 137 if (offset + count > length()) 138 realCount = length() - offset; 139 else 140 realCount = count; 141 142 String newStr = m_data; 143 newStr.remove(offset, realCount); 144 145 setDataAndUpdate(newStr, offset, count, 0); 146 147 document()->textRemoved(this, offset, realCount); 148} 149 150void CharacterData::replaceData(unsigned offset, unsigned count, const String& data, ExceptionCode& ec) 151{ 152 checkCharDataOperation(offset, ec); 153 if (ec) 154 return; 155 156 unsigned realCount; 157 if (offset + count > length()) 158 realCount = length() - offset; 159 else 160 realCount = count; 161 162 String newStr = m_data; 163 newStr.remove(offset, realCount); 164 newStr.insert(data, offset); 165 166 setDataAndUpdate(newStr, offset, count, data.length()); 167 168 // update the markers for spell checking and grammar checking 169 document()->textRemoved(this, offset, realCount); 170 document()->textInserted(this, offset, data.length()); 171} 172 173String CharacterData::nodeValue() const 174{ 175 return m_data; 176} 177 178bool CharacterData::containsOnlyWhitespace() const 179{ 180 return m_data.containsOnlyWhitespace(); 181} 182 183void CharacterData::setNodeValue(const String& nodeValue, ExceptionCode& ec) 184{ 185 setData(nodeValue, ec); 186} 187 188void CharacterData::setDataAndUpdate(const String& newData, unsigned offsetOfReplacedData, unsigned oldLength, unsigned newLength) 189{ 190 String oldData = m_data; 191 m_data = newData; 192 193 ASSERT(!renderer() || isTextNode()); 194 if (isTextNode()) 195 toText(this)->updateTextRenderer(offsetOfReplacedData, oldLength); 196 197 if (document()->frame()) 198 document()->frame()->selection()->textWasReplaced(this, offsetOfReplacedData, oldLength, newLength); 199 200 document()->incDOMTreeVersion(); 201 dispatchModifiedEvent(oldData); 202} 203 204void CharacterData::dispatchModifiedEvent(const String& oldData) 205{ 206 if (OwnPtr<MutationObserverInterestGroup> mutationRecipients = MutationObserverInterestGroup::createForCharacterDataMutation(this)) 207 mutationRecipients->enqueueMutationRecord(MutationRecord::createCharacterData(this, oldData)); 208 if (!isInShadowTree()) { 209 if (parentNode()) 210 parentNode()->childrenChanged(); 211 if (document()->hasListenerType(Document::DOMCHARACTERDATAMODIFIED_LISTENER)) 212 dispatchScopedEvent(MutationEvent::create(eventNames().DOMCharacterDataModifiedEvent, true, 0, oldData, m_data)); 213 dispatchSubtreeModifiedEvent(); 214 } 215#if ENABLE(INSPECTOR) 216 InspectorInstrumentation::characterDataModified(document(), this); 217#endif 218} 219 220void CharacterData::checkCharDataOperation(unsigned offset, ExceptionCode& ec) 221{ 222 ec = 0; 223 224 // INDEX_SIZE_ERR: Raised if the specified offset is negative or greater than the number of 16-bit 225 // units in data. 226 if (offset > length()) { 227 ec = INDEX_SIZE_ERR; 228 return; 229 } 230} 231 232int CharacterData::maxCharacterOffset() const 233{ 234 return static_cast<int>(length()); 235} 236 237bool CharacterData::offsetInCharacters() const 238{ 239 return true; 240} 241 242} // namespace WebCore 243