/*

 * (C) 1999 Lars Knoll (knoll@kde.org)

 * (C) 2000 Dirk Mueller (mueller@kde.org)

 * 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

 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the GNU

 * 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 "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 : public RenderText {

public:

    RenderTextFragment(Node*, StringImpl*, int startOffset, int length);

    RenderTextFragment(Node*, StringImpl*);

    virtual bool isTextFragment() const { return true; }

    virtual void destroy();

    unsigned start() const { return m_start; }

    unsigned end() const { return m_end; }

    RenderObject* firstLetter() const { return m_firstLetter; }

    void setFirstLetter(RenderObject* firstLetter) { m_firstLetter = firstLetter; }

    StringImpl* contentString() const { return m_contentString.get(); }

    virtual PassRefPtr<StringImpl> originalText() const;

private:

    virtual void setTextInternal(PassRefPtr<StringImpl>);

    virtual UChar previousCharacter();

    unsigned m_start;

    unsigned m_end;

    RefPtr<StringImpl> m_contentString;

    RenderObject* m_firstLetter;

};

} // namespace WebCore

#endif // RenderTextFragment_h