/*

 * Copyright (C) 2008 Apple Inc. All rights reserved.

 *

 * Redistribution and use in source and binary forms, with or without

 * modification, are permitted provided that the following conditions

 * are met:

 * 1. Redistributions of source code must retain the above copyright

 *    notice, this list of conditions and the following disclaimer.

 * 2. Redistributions in binary form must reproduce the above copyright

 *    notice, this list of conditions and the following disclaimer in the

 *    documentation and/or other materials provided with the distribution.

 *

 * THIS SOFTWARE IS PROVIDED BY APPLE COMPUTER, INC. ``AS IS'' AND ANY

 * EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE

 * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR

 * PURPOSE ARE DISCLAIMED.  IN NO EVENT SHALL APPLE COMPUTER, INC. OR

 * CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL,

 * EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO,

 * PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR

 * PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY

 * OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT

 * (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE

 * OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE. 

 */

#ifndef CSSCanvasValue_h

#define CSSCanvasValue_h

#include "CSSImageGeneratorValue.h"

#include "HTMLCanvasElement.h"

namespace WebCore {

class Document;

class CSSCanvasValue : public CSSImageGeneratorValue, private CanvasObserver {

public:

    static PassRefPtr<CSSCanvasValue> create() { return adoptRef(new CSSCanvasValue); }

    virtual ~CSSCanvasValue();

    virtual String cssText() const;

    virtual Image* image(RenderObject*, const IntSize&);

    virtual bool isFixedSize() const { return true; }

    virtual IntSize fixedSize(const RenderObject*);

    void setName(const String& name) { m_name = name; }

private:

    CSSCanvasValue()

        : m_element(0)

    {

    }

    virtual void canvasChanged(HTMLCanvasElement*, const FloatRect& changedRect);

    virtual void canvasResized(HTMLCanvasElement*);

    virtual void canvasDestroyed(HTMLCanvasElement*);

    HTMLCanvasElement* element(Document*);

    // The name of the canvas.

    String m_name;

    // The document supplies the element and owns it.

    HTMLCanvasElement* m_element;

};

} // namespace WebCore

#endif // CSSCanvasValue_h