/*

 * 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. 

 */

#include "config.h"

#include "CSSCanvasValue.h"

#include "ImageBuffer.h"

#include "RenderObject.h"

namespace WebCore {

CSSCanvasValue::~CSSCanvasValue()

{

    if (m_element)

        m_element->setObserver(0);

}

String CSSCanvasValue::cssText() const

{

    String result = "-webkit-canvas(";

    result += m_name  + ")";

    return result;

}

void CSSCanvasValue::canvasChanged(HTMLCanvasElement*, const FloatRect& changedRect)

{

    IntRect imageChangeRect = enclosingIntRect(changedRect);

    RenderObjectSizeCountMap::const_iterator end = m_clients.end();

    for (RenderObjectSizeCountMap::const_iterator curr = m_clients.begin(); curr != end; ++curr)

        curr->first->imageChanged(static_cast<WrappedImagePtr>(this), &imageChangeRect);

}

void CSSCanvasValue::canvasResized(HTMLCanvasElement*)

{

    RenderObjectSizeCountMap::const_iterator end = m_clients.end();

    for (RenderObjectSizeCountMap::const_iterator curr = m_clients.begin(); curr != end; ++curr)

        curr->first->imageChanged(static_cast<WrappedImagePtr>(this));

}

void CSSCanvasValue::canvasDestroyed(HTMLCanvasElement* element)

{

    ASSERT(element == m_element);

    if (element == m_element)

        m_element = 0;

}

IntSize CSSCanvasValue::fixedSize(const RenderObject* renderer)

{

    if (HTMLCanvasElement* elt = element(renderer->document()))

        return IntSize(elt->width(), elt->height());

    return IntSize();

}

HTMLCanvasElement* CSSCanvasValue::element(Document* document)

{

     if (!m_element) {

        m_element = document->getCSSCanvasElement(m_name);

        if (!m_element)

            return 0;

        m_element->setObserver(this);

    }

    return m_element;

}

Image* CSSCanvasValue::image(RenderObject* renderer, const IntSize& /*size*/)

{

    ASSERT(m_clients.contains(renderer));

    HTMLCanvasElement* elt = element(renderer->document());

    if (!elt || !elt->buffer())

        return 0;

    return elt->buffer()->image();

}

} // namespace WebCore