WebCore/CSSCanvasValue.h

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