1 /* 2 * (C) 1999 Lars Knoll (knoll (at) kde.org) 3 * (C) 2000 Dirk Mueller (mueller (at) kde.org) 4 * Copyright (C) 2004, 2005, 2006, 2007 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 23 #include "config.h" 24 #include "RenderTextFragment.h" 25 26 #include "RenderBlock.h" 27 #include "Text.h" 28 29 namespace WebCore { 30 31 RenderTextFragment::RenderTextFragment(Node* node, StringImpl* str, int startOffset, int length) 32 : RenderText(node, str ? str->substring(startOffset, length) : 0) 33 , m_start(startOffset) 34 , m_end(length) 35 , m_firstLetter(0) 36 { 37 } 38 39 RenderTextFragment::RenderTextFragment(Node* node, StringImpl* str) 40 : RenderText(node, str) 41 , m_start(0) 42 , m_end(str ? str->length() : 0) 43 , m_contentString(str) 44 , m_firstLetter(0) 45 { 46 } 47 48 RenderTextFragment::~RenderTextFragment() 49 { 50 } 51 52 PassRefPtr<StringImpl> RenderTextFragment::originalText() const 53 { 54 Node* e = node(); 55 RefPtr<StringImpl> result = ((e && e->isTextNode()) ? static_cast<Text*>(e)->dataImpl() : contentString()); 56 if (!result) 57 return 0; 58 return result->substring(start(), end()); 59 } 60 61 void RenderTextFragment::styleDidChange(StyleDifference diff, const RenderStyle* oldStyle) 62 { 63 RenderText::styleDidChange(diff, oldStyle); 64 65 if (RenderBlock* block = blockForAccompanyingFirstLetter()) { 66 block->style()->removeCachedPseudoStyle(FIRST_LETTER); 67 block->updateFirstLetter(); 68 } 69 } 70 71 void RenderTextFragment::destroy() 72 { 73 if (m_firstLetter) 74 m_firstLetter->destroy(); 75 RenderText::destroy(); 76 } 77 78 void RenderTextFragment::setTextInternal(PassRefPtr<StringImpl> text) 79 { 80 RenderText::setTextInternal(text); 81 if (m_firstLetter) { 82 ASSERT(!m_contentString); 83 m_firstLetter->destroy(); 84 m_firstLetter = 0; 85 m_start = 0; 86 m_end = textLength(); 87 if (Node* t = node()) { 88 ASSERT(!t->renderer()); 89 t->setRenderer(this); 90 } 91 } 92 } 93 94 UChar RenderTextFragment::previousCharacter() const 95 { 96 if (start()) { 97 Node* e = node(); 98 StringImpl* original = ((e && e->isTextNode()) ? static_cast<Text*>(e)->dataImpl() : contentString()); 99 if (original && start() <= original->length()) 100 return (*original)[start() - 1]; 101 } 102 103 return RenderText::previousCharacter(); 104 } 105 106 RenderBlock* RenderTextFragment::blockForAccompanyingFirstLetter() const 107 { 108 if (!m_firstLetter) 109 return 0; 110 for (RenderObject* block = m_firstLetter->parent(); block; block = block->parent()) { 111 if (block->style()->hasPseudoStyle(FIRST_LETTER) && block->canHaveChildren() && block->isRenderBlock()) 112 return toRenderBlock(block); 113 } 114 return 0; 115 } 116 117 } // namespace WebCore 118
