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* (C) 1999 Lars Knoll (
* (C) 2000 Dirk Mueller (
* Copyright (C) 2004, 2005, 2006, 2007 Apple Inc. All rights reserved.
* This library is free software; you can redistribute it and/or
* modify it under the terms of the GNU Library General Public
* License as published by the Free Software Foundation; either
* version 2 of the License, or (at your option) any later version.
* This library is distributed in the hope that it will be useful,
* but WITHOUT ANY WARRANTY; without even the implied warranty of
* Library General Public License for more details.
* You should have received a copy of the GNU Library General Public License
* along with this library; see the file COPYING.LIB. If not, write to
* the Free Software Foundation, Inc., 51 Franklin Street, Fifth Floor,
* Boston, MA 02110-1301, USA.
#ifndef RenderTextFragment_h
#define RenderTextFragment_h
#include "core/rendering/RenderText.h"
namespace WebCore {
// Used to represent a text substring of an element, e.g., for text runs that are split because of
// first letter and that must therefore have different styles (and positions in the render tree).
// We cache offsets so that text transformations can be applied in such a way that we can recover
// the original unaltered string from our corresponding DOM node.
class RenderTextFragment FINAL : public RenderText {
RenderTextFragment(Node*, StringImpl*, int startOffset, int length);
RenderTextFragment(Node*, StringImpl*);
virtual ~RenderTextFragment();
virtual bool isTextFragment() const { return true; }
virtual bool canBeSelectionLeaf() const OVERRIDE { return node() && node()->rendererIsEditable(); }
unsigned start() const { return m_start; }
unsigned end() const { return m_end; }
virtual unsigned textStartOffset() const OVERRIDE { return start(); }
RenderObject* firstLetter() const { return m_firstLetter; }
void setFirstLetter(RenderObject* firstLetter) { m_firstLetter = firstLetter; }
RenderText* firstRenderTextInFirstLetter() const;
StringImpl* contentString() const { return m_contentString.get(); }
virtual PassRefPtr<StringImpl> originalText() const;
virtual void setText(PassRefPtr<StringImpl>, bool force = false) OVERRIDE;
virtual void transformText() OVERRIDE;
virtual void styleDidChange(StyleDifference, const RenderStyle* oldStyle);
virtual void willBeDestroyed();
virtual UChar previousCharacter() const;
RenderBlock* blockForAccompanyingFirstLetter() const;
virtual void updateHitTestResult(HitTestResult&, const LayoutPoint&) OVERRIDE;
unsigned m_start;
unsigned m_end;
RefPtr<StringImpl> m_contentString;
RenderObject* m_firstLetter;
inline RenderTextFragment* toRenderTextFragment(RenderObject* object)
ASSERT_WITH_SECURITY_IMPLICATION(!object || toRenderText(object)->isTextFragment());
return static_cast<RenderTextFragment*>(object);
inline const RenderTextFragment* toRenderTextFragment(const RenderObject* object)
ASSERT_WITH_SECURITY_IMPLICATION(!object || toRenderText(object)->isTextFragment());
return static_cast<const RenderTextFragment*>(object);
// This will catch anyone doing an unnecessary cast.
void toRenderTextFragment(const RenderTextFragment*);
} // namespace WebCore
#endif // RenderTextFragment_h