/*

 * 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 DrawingAreaProxy_h

#define DrawingAreaProxy_h

#include "ArgumentEncoder.h"

#if PLATFORM(QT)

class QPainter;

#endif

namespace CoreIPC {

    class ArgumentDecoder;

    class Connection;

    class MessageID;

}

namespace WebCore {

    class IntSize;

    class IntRect;

}

namespace WebKit {

#if PLATFORM(MAC)

typedef CGContextRef PlatformDrawingContext;

#elif PLATFORM(WIN)

typedef HDC PlatformDrawingContext;

#elif PLATFORM(QT)

typedef QPainter* PlatformDrawingContext;

#endif

class DrawingAreaProxy {

public:

    // This has to match DrawingArea::Type.

    enum Type {

        None,

        ChunkedUpdateDrawingAreaType,

#if USE(ACCELERATED_COMPOSITING)

        LayerBackedDrawingAreaType,

#endif

    };

    virtual ~DrawingAreaProxy();

    Type type() const { return m_type; }

    virtual void didReceiveMessage(CoreIPC::Connection*, CoreIPC::MessageID, CoreIPC::ArgumentDecoder&) = 0;

    virtual void didReceiveSyncMessage(CoreIPC::Connection*, CoreIPC::MessageID, CoreIPC::ArgumentDecoder&, CoreIPC::ArgumentEncoder&) = 0;

    virtual void paint(const WebCore::IntRect&, PlatformDrawingContext) = 0;

    virtual void setSize(const WebCore::IntSize&) = 0;

    virtual void setPageIsVisible(bool isVisible) = 0;

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

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

    {

        encoder.encode(static_cast<uint32_t>(m_type));

    }

#if USE(ACCELERATED_COMPOSITING)

    virtual void attachCompositingContext(uint32_t contextID) = 0;

    virtual void detachCompositingContext() = 0;

#endif

protected:

    DrawingAreaProxy(Type);

    Type m_type;

};

} // namespace WebKit

#endif // DrawingAreaProxy_h