/*

 * Copyright (C) 2010 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 INC. AND ITS CONTRIBUTORS ``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 INC. OR ITS 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.

 */

#if USE(ACCELERATED_COMPOSITING)

#include "LayerBackedDrawingArea.h"

#include "DrawingAreaMessageKinds.h"

#include "DrawingAreaProxyMessageKinds.h"

#include "MessageID.h"

#include "WebCoreArgumentCoders.h"

#include "WebPage.h"

#include "WebProcess.h"

#include <WebCore/GraphicsLayer.h>

using namespace WebCore;

namespace WebKit {

LayerBackedDrawingArea::LayerBackedDrawingArea(WebPage* webPage)

    : DrawingArea(LayerBackedDrawingAreaType, webPage)

    , m_syncTimer(WebProcess::shared().runLoop(), this, &LayerBackedDrawingArea::syncCompositingLayers)

#if PLATFORM(MAC) && HAVE(HOSTED_CORE_ANIMATION)

    , m_remoteLayerRef(0)

#endif

    , m_attached(false)

    , m_shouldPaint(true)

{

    m_backingLayer = GraphicsLayer::create(this);

    m_backingLayer->setDrawsContent(true);

#ifndef NDEBUG

    m_backingLayer->setName("DrawingArea backing layer");

#endif

    m_backingLayer->syncCompositingStateForThisLayerOnly();

    m_backingLayer->setContentsOrientation(GraphicsLayer::CompositingCoordinatesBottomUp);

    platformInit();

}

LayerBackedDrawingArea::~LayerBackedDrawingArea()

{

    platformClear();

}

void LayerBackedDrawingArea::invalidateWindow(const IntRect& rect, bool immediate)

{

}

void LayerBackedDrawingArea::invalidateContentsAndWindow(const IntRect& rect, bool immediate)

{

    setNeedsDisplay(rect);

}

void LayerBackedDrawingArea::invalidateContentsForSlowScroll(const IntRect& rect, bool immediate)

{

    setNeedsDisplay(rect);

}

void LayerBackedDrawingArea::scroll(const IntSize& scrollDelta, const IntRect& rectToScroll, const IntRect& clipRect)

{

    // FIXME: Do something much smarter.

    setNeedsDisplay(rectToScroll);

}

void LayerBackedDrawingArea::setNeedsDisplay(const IntRect& rect)

{

    m_backingLayer->setNeedsDisplayInRect(rect);

    m_backingLayer->syncCompositingStateForThisLayerOnly();

#if PLATFORM(MAC)

    scheduleUpdateLayoutRunLoopObserver();

#endif

}

void LayerBackedDrawingArea::display()

{

    // Layout if necessary.

    m_webPage->layoutIfNeeded();

}

void LayerBackedDrawingArea::scheduleDisplay()

{

}

void LayerBackedDrawingArea::setSize(const IntSize& viewSize)

{

    ASSERT(m_shouldPaint);

    ASSERT_ARG(viewSize, !viewSize.isEmpty());

    m_backingLayer->setSize(viewSize);

    m_backingLayer->syncCompositingStateForThisLayerOnly();

    m_webPage->setSize(viewSize);

    // Layout if necessary.

    m_webPage->layoutIfNeeded();

    WebProcess::shared().connection()->send(DrawingAreaProxyMessage::DidSetSize, m_webPage->pageID(), CoreIPC::In());

}

void LayerBackedDrawingArea::suspendPainting()

{

    ASSERT(m_shouldPaint);

    m_shouldPaint = false;

}

void LayerBackedDrawingArea::resumePainting()

{

    ASSERT(!m_shouldPaint);

    m_shouldPaint = true;

    // Display if needed.

    display();

}

void LayerBackedDrawingArea::didUpdate()

{

    // Display if needed.

    display();

}

void LayerBackedDrawingArea::didReceiveMessage(CoreIPC::Connection*, CoreIPC::MessageID messageID, CoreIPC::ArgumentDecoder& arguments)

{

    switch (messageID.get<DrawingAreaMessage::Kind>()) {

        case DrawingAreaMessage::SetSize: {

            IntSize size;

            if (!arguments.decode(CoreIPC::Out(size)))

                return;

            setSize(size);

            break;

        }

        case DrawingAreaMessage::SuspendPainting:

            suspendPainting();

            break;

        case DrawingAreaMessage::ResumePainting:

            resumePainting();

            break;

        case DrawingAreaMessage::DidUpdate:

            didUpdate();

            break;

        default:

            ASSERT_NOT_REACHED();

            break;

    }

}

// GraphicsLayerClient methods

void LayerBackedDrawingArea::paintContents(const GraphicsLayer*, GraphicsContext& graphicsContext, GraphicsLayerPaintingPhase, const IntRect& inClip)

{

    m_webPage->drawRect(graphicsContext, inClip);

}

bool LayerBackedDrawingArea::showDebugBorders() const

{

    // FIXME: get from settings;

    return false;

}

bool LayerBackedDrawingArea::showRepaintCounter() const

{

    // FIXME: get from settings;

    return false;

}

#if !PLATFORM(MAC)

void LayerBackedDrawingArea::attachCompositingContext(GraphicsLayer*)

{

}

void LayerBackedDrawingArea::detachCompositingContext()

{

}

#if !PLATFORM(MAC)

void LayerBackedDrawingArea::setRootCompositingLayer(WebCore::GraphicsLayer*)

{

}

#endif

void LayerBackedDrawingArea::scheduleCompositingLayerSync()

{

}

void LayerBackedDrawingArea::syncCompositingLayers()

{

}

void LayerBackedDrawingArea::platformInit()

{

}

void LayerBackedDrawingArea::platformClear()

{

}

#endif

} // namespace WebKit

#endif // USE(ACCELERATED_COMPOSITING)