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 #ifndef RenderTextFragment_h 24 #define RenderTextFragment_h 25 26 #include "core/rendering/RenderText.h" 27 28 namespace blink { 29 30 // Used to represent a text substring of an element, e.g., for text runs that are split because of 31 // first letter and that must therefore have different styles (and positions in the render tree). 32 // We cache offsets so that text transformations can be applied in such a way that we can recover 33 // the original unaltered string from our corresponding DOM node. 34 class RenderTextFragment FINAL : public RenderText { 35 public: 36 RenderTextFragment(Node*, StringImpl*, int startOffset, int length); 37 RenderTextFragment(Node*, StringImpl*); 38 virtual ~RenderTextFragment(); 39 virtual void trace(Visitor*) OVERRIDE; 40 isTextFragment()41 virtual bool isTextFragment() const OVERRIDE { return true; } 42 canBeSelectionLeaf()43 virtual bool canBeSelectionLeaf() const OVERRIDE { return node() && node()->hasEditableStyle(); } 44 start()45 unsigned start() const { return m_start; } end()46 unsigned end() const { return m_end; } textStartOffset()47 virtual unsigned textStartOffset() const OVERRIDE { return start(); } 48 firstLetter()49 RenderBoxModelObject* firstLetter() const { return m_firstLetter; } setFirstLetter(RenderBoxModelObject * firstLetter)50 void setFirstLetter(RenderBoxModelObject* firstLetter) { m_firstLetter = firstLetter; } 51 RenderText* firstRenderTextInFirstLetter() const; 52 contentString()53 StringImpl* contentString() const { return m_contentString.get(); } 54 virtual PassRefPtr<StringImpl> originalText() const OVERRIDE; 55 56 virtual void setText(PassRefPtr<StringImpl>, bool force = false) OVERRIDE; 57 58 virtual void transformText() OVERRIDE; 59 renderName()60 virtual const char* renderName() const OVERRIDE FINAL { return "RenderTextFragment"; } 61 62 protected: 63 virtual void styleDidChange(StyleDifference, const RenderStyle* oldStyle) OVERRIDE; 64 65 private: 66 virtual void willBeDestroyed() OVERRIDE; 67 68 virtual UChar previousCharacter() const OVERRIDE; 69 RenderBlock* blockForAccompanyingFirstLetter() const; 70 virtual void updateHitTestResult(HitTestResult&, const LayoutPoint&) OVERRIDE; 71 72 unsigned m_start; 73 unsigned m_end; 74 RefPtr<StringImpl> m_contentString; 75 RawPtrWillBeMember<RenderBoxModelObject> m_firstLetter; 76 }; 77 78 DEFINE_TYPE_CASTS(RenderTextFragment, RenderObject, object, toRenderText(object)->isTextFragment(), toRenderText(object).isTextFragment()); 79 80 } // namespace blink 81 82 #endif // RenderTextFragment_h 83