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1 /*
2  * Copyright (C) 2000 Lars Knoll (knoll@kde.org)
3  *           (C) 2000 Antti Koivisto (koivisto@kde.org)
4  *           (C) 2000 Dirk Mueller (mueller@kde.org)
5  * Copyright (C) 2003, 2005, 2006, 2007, 2008, 2010 Apple Inc. All rights reserved.
6  * Copyright (C) 2006 Graham Dennis (graham.dennis@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 "CounterContent.h"
29 #include <wtf/OwnPtr.h>
30 #include <wtf/PassOwnPtr.h>
31 
32 namespace WebCore {
33 
34 class StyleImage;
35 
36 struct ContentData {
37     WTF_MAKE_NONCOPYABLE(ContentData); WTF_MAKE_FAST_ALLOCATED;
38 public:
ContentDataContentData39     ContentData()
40         : m_type(CONTENT_NONE)
41     {
42     }
43 
~ContentDataContentData44     ~ContentData()
45     {
46         clear();
47     }
48 
49     void clear();
50 
isCounterContentData51     bool isCounter() const { return m_type == CONTENT_COUNTER; }
isImageContentData52     bool isImage() const { return m_type == CONTENT_OBJECT; }
isNoneContentData53     bool isNone() const { return m_type == CONTENT_NONE; }
isQuoteContentData54     bool isQuote() const { return m_type == CONTENT_QUOTE; }
isTextContentData55     bool isText() const { return m_type == CONTENT_TEXT; }
56 
typeContentData57     StyleContentType type() const { return m_type; }
58 
59     bool dataEquivalent(const ContentData&) const;
60 
imageContentData61     StyleImage* image() const
62     {
63         ASSERT(isImage());
64         return m_content.m_image;
65     }
setImageContentData66     void setImage(PassRefPtr<StyleImage> image)
67     {
68         deleteContent();
69         m_type = CONTENT_OBJECT;
70         m_content.m_image = image.leakRef();
71     }
72 
textContentData73     StringImpl* text() const
74     {
75         ASSERT(isText());
76         return m_content.m_text;
77     }
setTextContentData78     void setText(PassRefPtr<StringImpl> text)
79     {
80         deleteContent();
81         m_type = CONTENT_TEXT;
82         m_content.m_text = text.leakRef();
83     }
84 
counterContentData85     CounterContent* counter() const
86     {
87         ASSERT(isCounter());
88         return m_content.m_counter;
89     }
setCounterContentData90     void setCounter(PassOwnPtr<CounterContent> counter)
91     {
92         deleteContent();
93         m_type = CONTENT_COUNTER;
94         m_content.m_counter = counter.leakPtr();
95     }
96 
quoteContentData97     QuoteType quote() const
98     {
99         ASSERT(isQuote());
100         return m_content.m_quote;
101     }
setQuoteContentData102     void setQuote(QuoteType type)
103     {
104         deleteContent();
105         m_type = CONTENT_QUOTE;
106         m_content.m_quote = type;
107     }
108 
nextContentData109     ContentData* next() const { return m_next.get(); }
setNextContentData110     void setNext(PassOwnPtr<ContentData> next) { m_next = next; }
111 
112 private:
113     void deleteContent();
114 
115     StyleContentType m_type;
116     union {
117         StyleImage* m_image;
118         StringImpl* m_text;
119         CounterContent* m_counter;
120         QuoteType m_quote;
121     } m_content;
122     OwnPtr<ContentData> m_next;
123 };
124 
125 } // namespace WebCore
126 
127 #endif // ContentData_h
128