Source/web/PinchViewports.h

/*
 * Copyright (C) 2013 Google 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:
 *
 *     * Redistributions of source code must retain the above copyright
 * notice, this list of conditions and the following disclaimer.
 *     * 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.
 *     * Neither the name of Google Inc. nor the names of its
 * contributors may be used to endorse or promote products derived from
 * this software without specific prior written permission.
 *
 * THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND 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 THE COPYRIGHT
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 * LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE,
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 */

#ifndef PinchViewports_h
#define PinchViewports_h

#include "core/platform/graphics/GraphicsLayerClient.h"
#include "core/platform/graphics/IntSize.h"
#include "public/platform/WebScrollbar.h"
#include "public/platform/WebSize.h"
#include "wtf/OwnPtr.h"
#include "wtf/PassOwnPtr.h"

namespace WebCore {
class GraphicsContext;
class GraphicsLayer;
class IntRect;
class IntSize;
}

namespace WebKit {

class WebLayerTreeView;
class WebScrollbarLayer;
class WebViewImpl;

class PinchViewports : WebCore::GraphicsLayerClient {
public:
    static PassOwnPtr<PinchViewports> create(WebViewImpl* owner);
    ~PinchViewports();

    void setOverflowControlsHostLayer(WebCore::GraphicsLayer*);
    WebCore::GraphicsLayer* rootGraphicsLayer()
    {
        return m_innerViewportContainerLayer.get();
    }
    void setViewportSize(const WebCore::IntSize&);

    void registerViewportLayersWithTreeView(WebLayerTreeView*) const;
    void clearViewportLayersForTreeView(WebLayerTreeView*) const;

    // GraphicsLayerClient implementation.
    virtual void notifyAnimationStarted(const WebCore::GraphicsLayer*, double time) OVERRIDE;
    virtual void paintContents(const WebCore::GraphicsLayer*, WebCore::GraphicsContext&, WebCore::GraphicsLayerPaintingPhase, const WebCore::IntRect& inClip) OVERRIDE;

    virtual String debugName(const WebCore::GraphicsLayer*) OVERRIDE;

private:
    explicit PinchViewports(WebViewImpl* owner);

    void setupScrollbar(WebKit::WebScrollbar::Orientation);

    WebViewImpl* m_owner;
    OwnPtr<WebCore::GraphicsLayer> m_innerViewportContainerLayer;
    OwnPtr<WebCore::GraphicsLayer> m_pageScaleLayer;
    OwnPtr<WebCore::GraphicsLayer> m_innerViewportScrollLayer;
    OwnPtr<WebCore::GraphicsLayer> m_overlayScrollbarHorizontal;
    OwnPtr<WebCore::GraphicsLayer> m_overlayScrollbarVertical;
    OwnPtr<WebScrollbarLayer> m_webOverlayScrollbarHorizontal;
    OwnPtr<WebScrollbarLayer> m_webOverlayScrollbarVertical;
};

} // namespace WebKit

#endif // PinchViewports_h