1/* 2 * (C) 1999 Lars Knoll (knoll@kde.org) 3 * (C) 2000 Dirk Mueller (mueller@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 "RenderIterator.h" 28#include "Text.h" 29 30namespace WebCore { 31 32RenderTextFragment::RenderTextFragment(Text& textNode, const String& text, int startOffset, int length) 33 : RenderText(textNode, text.substring(startOffset, length)) 34 , m_start(startOffset) 35 , m_end(length) 36 , m_firstLetter(nullptr) 37{ 38} 39 40RenderTextFragment::RenderTextFragment(Document& document, const String& text, int startOffset, int length) 41 : RenderText(document, text.substring(startOffset, length)) 42 , m_start(startOffset) 43 , m_end(length) 44 , m_firstLetter(nullptr) 45{ 46} 47 48RenderTextFragment::RenderTextFragment(Document& textNode, const String& text) 49 : RenderText(textNode, text) 50 , m_start(0) 51 , m_end(text.length()) 52 , m_contentString(text) 53 , m_firstLetter(nullptr) 54{ 55} 56 57RenderTextFragment::~RenderTextFragment() 58{ 59} 60 61bool RenderTextFragment::canBeSelectionLeaf() const 62{ 63 return textNode() && textNode()->hasEditableStyle(); 64} 65 66void RenderTextFragment::styleDidChange(StyleDifference diff, const RenderStyle* oldStyle) 67{ 68 RenderText::styleDidChange(diff, oldStyle); 69 70 if (RenderBlock* block = blockForAccompanyingFirstLetter()) { 71 block->style().removeCachedPseudoStyle(FIRST_LETTER); 72 block->updateFirstLetter(); 73 } 74} 75 76void RenderTextFragment::willBeDestroyed() 77{ 78 if (m_firstLetter) 79 m_firstLetter->destroy(); 80 RenderText::willBeDestroyed(); 81} 82 83void RenderTextFragment::setText(const String& text, bool force) 84{ 85 RenderText::setText(text, force); 86 87 m_start = 0; 88 m_end = textLength(); 89 if (!m_firstLetter) 90 return; 91 ASSERT(!m_contentString); 92 m_firstLetter->destroy(); 93 m_firstLetter = 0; 94 if (!textNode()) 95 return; 96 ASSERT(!textNode()->renderer()); 97 textNode()->setRenderer(this); 98} 99 100UChar RenderTextFragment::previousCharacter() const 101{ 102 if (start()) { 103 String original = textNode() ? textNode()->data() : contentString(); 104 if (!original.isNull() && start() <= original.length()) 105 return original[start() - 1]; 106 } 107 108 return RenderText::previousCharacter(); 109} 110 111RenderBlock* RenderTextFragment::blockForAccompanyingFirstLetter() 112{ 113 if (!m_firstLetter) 114 return nullptr; 115 for (auto& block : ancestorsOfType<RenderBlock>(*m_firstLetter)) { 116 if (block.style().hasPseudoStyle(FIRST_LETTER) && block.canHaveChildren()) 117 return █ 118 } 119 return nullptr; 120} 121 122} // namespace WebCore 123