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 CSSCanvasValue_h
27 #define CSSCanvasValue_h
28 
29 #include "CSSImageGeneratorValue.h"
30 #include "HTMLCanvasElement.h"
31 
32 namespace WebCore {
33 
34 class Document;
35 
36 class CSSCanvasValue : public CSSImageGeneratorValue, private CanvasObserver {
37 public:
create()38     static PassRefPtr<CSSCanvasValue> create() { return adoptRef(new CSSCanvasValue); }
39     virtual ~CSSCanvasValue();
40 
41     virtual String cssText() const;
42 
43     virtual PassRefPtr<Image> image(RenderObject*, const IntSize&);
isFixedSize()44     virtual bool isFixedSize() const { return true; }
45     virtual IntSize fixedSize(const RenderObject*);
46 
setName(const String & name)47     void setName(const String& name) { m_name = name; }
48 
49 private:
CSSCanvasValue()50     CSSCanvasValue()
51         : m_element(0)
52     {
53     }
54 
55     virtual void canvasChanged(HTMLCanvasElement*, const FloatRect& changedRect);
56     virtual void canvasResized(HTMLCanvasElement*);
57     virtual void canvasDestroyed(HTMLCanvasElement*);
58 
59     HTMLCanvasElement* element(Document*);
60 
61     // The name of the canvas.
62     String m_name;
63     // The document supplies the element and owns it.
64     HTMLCanvasElement* m_element;
65 };
66 
67 } // namespace WebCore
68 
69 #endif // CSSCanvasValue_h
70