/*

 * 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.

 */

#ifndef DrawingAreaProxyUpdateChunk_h

#define DrawingAreaProxyUpdateChunk_h

#include "DrawingAreaProxy.h"

#include <WebCore/IntSize.h>

#if PLATFORM(MAC)

#include <wtf/RetainPtr.h>

#ifdef __OBJC__

@class WKView;

#else

class WKView;

#endif

#elif PLATFORM(QT)

#include <QImage>

class QGraphicsWKView;

#endif

namespace WebKit {

class UpdateChunk;

class WebPageProxy;

#if PLATFORM(MAC)

typedef WKView PlatformWebView;

#elif PLATFORM(WIN)

class WebView;

typedef WebView PlatformWebView;

#elif PLATFORM(QT)

typedef QGraphicsWKView PlatformWebView;

#endif

class ChunkedUpdateDrawingAreaProxy : public DrawingAreaProxy {

public:

    ChunkedUpdateDrawingAreaProxy(PlatformWebView*);

    virtual ~ChunkedUpdateDrawingAreaProxy();

    // The DrawingAreaProxy should never be decoded itself. Instead, the DrawingArea should be decoded.

    virtual void encode(CoreIPC::ArgumentEncoder& encoder) const

    {

        DrawingAreaProxy::encode(encoder);

    }

private:

    WebPageProxy* page();

    // DrawingAreaProxy

    virtual void didReceiveMessage(CoreIPC::Connection*, CoreIPC::MessageID, CoreIPC::ArgumentDecoder&);

    virtual void didReceiveSyncMessage(CoreIPC::Connection*, CoreIPC::MessageID, CoreIPC::ArgumentDecoder&, CoreIPC::ArgumentEncoder&);

    virtual void paint(const WebCore::IntRect&, PlatformDrawingContext);

    virtual void setSize(const WebCore::IntSize&);

    virtual void setPageIsVisible(bool isVisible);

    void ensureBackingStore();

    void invalidateBackingStore();

    void platformPaint(const WebCore::IntRect&, PlatformDrawingContext);

    void drawUpdateChunkIntoBackingStore(UpdateChunk*);

    void didSetSize(UpdateChunk*);

    void update(UpdateChunk*);

#if USE(ACCELERATED_COMPOSITING)

    virtual void attachCompositingContext(uint32_t) { }

    virtual void detachCompositingContext() { }

#endif

    bool m_isWaitingForDidSetFrameNotification;

    bool m_isVisible;

    bool m_forceRepaintWhenResumingPainting;

    WebCore::IntSize m_viewSize; // Size of the BackingStore as well.

    WebCore::IntSize m_lastSetViewSize;

#if PLATFORM(MAC)

    // BackingStore

    RetainPtr<CGContextRef> m_bitmapContext;

#elif PLATFORM(WIN)

    // BackingStore

    OwnPtr<HDC> m_backingStoreDC;

    OwnPtr<HBITMAP> m_backingStoreBitmap;

#elif PLATFORM(QT)

    QImage m_backingStoreImage;

#endif

    PlatformWebView* m_webView;

};

} // namespace WebKit

#endif // DrawingAreaProxyUpdateChunk_h