/*

 * Copyright (C) 2004, 2006, 2007 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 "RenderHTMLCanvas.h"

#include "Document.h"

#include "GraphicsContext.h"

#include "HTMLCanvasElement.h"

#include "HTMLNames.h"

#include "RenderView.h"

#include "FrameView.h"

namespace WebCore {

using namespace HTMLNames;

RenderHTMLCanvas::RenderHTMLCanvas(HTMLCanvasElement* element)

    : RenderReplaced(element, element->size())

{

    view()->frameView()->setIsVisuallyNonEmpty();

}

bool RenderHTMLCanvas::requiresLayer() const

{

    if (RenderReplaced::requiresLayer())

        return true;

#if ENABLE(3D_CANVAS)

    HTMLCanvasElement* canvas = static_cast<HTMLCanvasElement*>(node());

    return canvas && canvas->is3D();

#else

    return false;

#endif

}

void RenderHTMLCanvas::paintReplaced(PaintInfo& paintInfo, int tx, int ty)

{

    IntRect rect = contentBoxRect();

    rect.move(tx, ty);

    static_cast<HTMLCanvasElement*>(node())->paint(paintInfo.context, rect);

}

void RenderHTMLCanvas::canvasSizeChanged()

{

    IntSize canvasSize = static_cast<HTMLCanvasElement*>(node())->size();

    IntSize zoomedSize(canvasSize.width() * style()->effectiveZoom(), canvasSize.height() * style()->effectiveZoom());

    if (zoomedSize == intrinsicSize())

        return;

    setIntrinsicSize(zoomedSize);

    if (!parent())

        return;

    if (!prefWidthsDirty())

        setPrefWidthsDirty(true);

    IntSize oldSize = size();

    calcWidth();

    calcHeight();

    if (oldSize == size())

        return;

    if (!selfNeedsLayout())

        setNeedsLayout(true);

}

} // namespace WebCore