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      1 /*
      2  * Copyright (C) 2000 Lars Knoll (knoll (at) kde.org)
      3  *           (C) 2000 Antti Koivisto (koivisto (at) kde.org)
      4  *           (C) 2000 Dirk Mueller (mueller (at) kde.org)
      5  * Copyright (C) 2003, 2005, 2006, 2007, 2008 Apple Inc. All rights reserved.
      6  * Copyright (C) 2006 Graham Dennis (graham.dennis (at) gmail.com)
      7  *
      8  * This library is free software; you can redistribute it and/or
      9  * modify it under the terms of the GNU Library General Public
     10  * License as published by the Free Software Foundation; either
     11  * version 2 of the License, or (at your option) any later version.
     12  *
     13  * This library is distributed in the hope that it will be useful,
     14  * but WITHOUT ANY WARRANTY; without even the implied warranty of
     15  * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the GNU
     16  * Library General Public License for more details.
     17  *
     18  * You should have received a copy of the GNU Library General Public License
     19  * along with this library; see the file COPYING.LIB.  If not, write to
     20  * the Free Software Foundation, Inc., 51 Franklin Street, Fifth Floor,
     21  * Boston, MA 02110-1301, USA.
     22  *
     23  */
     24 
     25 #ifndef ContentData_h
     26 #define ContentData_h
     27 
     28 #include "RenderStyleConstants.h"
     29 #include <wtf/Noncopyable.h>
     30 #include <wtf/PassRefPtr.h>
     31 
     32 namespace WebCore {
     33 
     34 class CounterContent;
     35 class StringImpl;
     36 class StyleImage;
     37 
     38 struct ContentData : Noncopyable {
     39 public:
     40     ContentData()
     41         : m_type(CONTENT_NONE)
     42         , m_next(0)
     43     {
     44     }
     45 
     46     ~ContentData()
     47     {
     48         clear();
     49     }
     50 
     51     void clear();
     52 
     53     bool isCounter() const { return m_type == CONTENT_COUNTER; }
     54     bool isImage() const { return m_type == CONTENT_OBJECT; }
     55     bool isNone() const { return m_type == CONTENT_NONE; }
     56     bool isText() const { return m_type == CONTENT_TEXT; }
     57 
     58     StyleContentType type() const { return m_type; }
     59 
     60     bool dataEquivalent(const ContentData&) const;
     61 
     62     StyleImage* image() const { return m_content.m_image; }
     63     void setImage(PassRefPtr<StyleImage> image)
     64     {
     65         deleteContent();
     66         m_type = CONTENT_OBJECT;
     67         m_content.m_image = image.releaseRef();
     68     }
     69 
     70     StringImpl* text() const { return m_content.m_text; }
     71     void setText(PassRefPtr<StringImpl> text)
     72     {
     73         deleteContent();
     74         m_type = CONTENT_TEXT;
     75         m_content.m_text = text.releaseRef();
     76     }
     77 
     78     CounterContent* counter() const { return m_content.m_counter; }
     79     void setCounter(CounterContent* counter)
     80     {
     81         deleteContent();
     82         m_type = CONTENT_COUNTER;
     83         m_content.m_counter = counter;
     84     }
     85 
     86     ContentData* next() const { return m_next; }
     87     void setNext(ContentData* next)
     88     {
     89         m_next = next;
     90     }
     91 
     92 private:
     93     void deleteContent();
     94 
     95     StyleContentType m_type;
     96     union {
     97         StyleImage* m_image;
     98         StringImpl* m_text;
     99         CounterContent* m_counter;
    100     } m_content;
    101     ContentData* m_next;
    102 };
    103 
    104 } // namespace WebCore
    105 
    106 #endif // ContentData_h
    107