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 "RenderText.h"

    27 

    28 namespace WebCore {

    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 : public RenderText {

    35 public:

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

    37     RenderTextFragment(Node*, StringImpl*);

    38 

    39     virtual bool isTextFragment() const { return true; }

    40 

    41     virtual void destroy();

    42 

    43     unsigned start() const { return m_start; }

    44     unsigned end() const { return m_end; }

    45 

    46     RenderObject* firstLetter() const { return m_firstLetter; }

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

    48 

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

    50     virtual PassRefPtr<StringImpl> originalText() const;

    51 

    52 private:

    53     virtual void setTextInternal(PassRefPtr<StringImpl>);

    54     virtual UChar previousCharacter();

    55 

    56     unsigned m_start;

    57     unsigned m_end;

    58     RefPtr<StringImpl> m_contentString;

    59     RenderObject* m_firstLetter;

    60 };

    61 

    62 } // namespace WebCore

    63 

    64 #endif // RenderTextFragment_h