Source/WebCore/page/scrolling/blackberry/ScrollingCoordinatorBlackBerry.h

/*
 * Copyright (C) 2013 Research In Motion Limited. 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 ScrollingCoordinatorBlackBerry_h
#define ScrollingCoordinatorBlackBerry_h

#include "ScrollingCoordinator.h"

namespace WebCore {

class ScrollingCoordinatorBlackBerry : public ScrollingCoordinator {
public:
    explicit ScrollingCoordinatorBlackBerry(Page*);

    // Return whether this scrolling coordinator can keep fixed position layers fixed to their
    // containers while scrolling.
    virtual bool supportsFixedPositionLayers() const { return true; }

    // Mark/unmark a layer as a container for fixed position layers.
    virtual void setLayerIsContainerForFixedPositionLayers(GraphicsLayer*, bool);

    // Attach/detach layer position to ancestor fixed position container.
    virtual void setLayerIsFixedToContainerLayer(GraphicsLayer*, bool);

    // Whether the layer is fixed the top or bottom edge, left or right edge.
    void setLayerFixedToContainerLayerEdge(GraphicsLayer*, bool fixedToTop, bool fixedToLeft);

    virtual void frameViewFrameRectDidChange(FrameView*);
    virtual void frameViewContentsSizeDidChange(FrameView*);
};

} // namespace WebCore

#endif // ScrollingCoordinatorBlackBerry_h