• Home
  • Line#
  • Scopes#
  • Navigate#
  • Raw
  • Download
1 /*
2  * Copyright (C) 2008 Apple Inc. All rights reserved.
3  *
4  * Redistribution and use in source and binary forms, with or without
5  * modification, are permitted provided that the following conditions
6  * are met:
7  * 1. Redistributions of source code must retain the above copyright
8  *    notice, this list of conditions and the following disclaimer.
9  * 2. Redistributions in binary form must reproduce the above copyright
10  *    notice, this list of conditions and the following disclaimer in the
11  *    documentation and/or other materials provided with the distribution.
12  *
13  * THIS SOFTWARE IS PROVIDED BY APPLE COMPUTER, INC. ``AS IS'' AND ANY
14  * EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
15  * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR
16  * PURPOSE ARE DISCLAIMED.  IN NO EVENT SHALL APPLE COMPUTER, INC. OR
17  * CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL,
18  * EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO,
19  * PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR
20  * PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY
21  * OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
22  * (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE
23  * OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
24  */
25 
26 #ifndef CSSImageGeneratorValue_h
27 #define CSSImageGeneratorValue_h
28 
29 #include "CSSValue.h"
30 #include "IntSizeHash.h"
31 #include <wtf/HashMap.h>
32 #include <wtf/HashCountedSet.h>
33 #include <wtf/RefPtr.h>
34 
35 namespace WebCore {
36 
37 class Image;
38 class StyleGeneratedImage;
39 class RenderObject;
40 
41 class CSSImageGeneratorValue : public CSSValue {
42 public:
43     virtual ~CSSImageGeneratorValue();
44 
45     void addClient(RenderObject*, const IntSize&);
46     void removeClient(RenderObject*);
47     virtual PassRefPtr<Image> image(RenderObject*, const IntSize&) = 0;
48 
49     StyleGeneratedImage* generatedImage();
50 
isFixedSize()51     virtual bool isFixedSize() const { return false; }
fixedSize(const RenderObject *)52     virtual IntSize fixedSize(const RenderObject*) { return IntSize(); }
53 
54 protected:
55     CSSImageGeneratorValue();
56 
57     Image* getImage(RenderObject*, const IntSize&);
58     void putImage(const IntSize&, PassRefPtr<Image>);
59 
60     typedef pair<IntSize, int> SizeCountPair;
61     typedef HashMap<RenderObject*, SizeCountPair> RenderObjectSizeCountMap;
62 
63     HashCountedSet<IntSize> m_sizes; // A count of how many times a given image size is in use.
64     RenderObjectSizeCountMap m_clients; // A map from RenderObjects (with entry count) to image sizes.
65     HashMap<IntSize, RefPtr<Image> > m_images; // A cache of Image objects by image size.
66 
67     RefPtr<StyleGeneratedImage> m_image;
68     bool m_accessedImage;
69 
70 private:
isImageGeneratorValue()71     virtual bool isImageGeneratorValue() const { return true; }
72 };
73 
74 } // namespace WebCore
75 
76 #endif // CSSImageGeneratorValue_h
77