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/*
* Copyright (C) 2012 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 ScrollingCoordinatorChromium_h
#define ScrollingCoordinatorChromium_h
#include "ScrollingCoordinator.h"
namespace WebKit {
class WebScrollbarLayer;
class WebLayer;
}
namespace WebCore {
class Scrollbar;
class ScrollingCoordinatorPrivate;
class ScrollingCoordinatorChromium : public ScrollingCoordinator {
public:
explicit ScrollingCoordinatorChromium(Page*);
virtual ~ScrollingCoordinatorChromium();
// Should be called whenever the given frame view has been laid out.
virtual void frameViewLayoutUpdated(FrameView*);
// Should be called whenever the root layer for the given frame view changes.
virtual void frameViewRootLayerDidChange(FrameView*);
// Should be called whenever the horizontal scrollbar layer for the given frame view changes.
virtual void frameViewHorizontalScrollbarLayerDidChange(FrameView*, GraphicsLayer*);
// Should be called whenever the vertical scrollbar layer for the given frame view changes.
virtual void frameViewVerticalScrollbarLayerDidChange(FrameView*, GraphicsLayer*);
// 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);
// Should be called whenever the scrollable layer for the given scroll area changes.
virtual void scrollableAreaScrollLayerDidChange(ScrollableArea*, GraphicsLayer*);
private:
virtual void recomputeWheelEventHandlerCountForFrameView(FrameView*);
virtual void setShouldUpdateScrollLayerPositionOnMainThread(MainThreadScrollingReasons);
void setScrollLayer(GraphicsLayer*);
void setNonFastScrollableRegion(const Region&);
void setWheelEventHandlerCount(unsigned);
PassOwnPtr<WebKit::WebScrollbarLayer> createScrollbarLayer(Scrollbar*, WebKit::WebLayer* scrollLayer, GraphicsLayer* scrollbarGraphicsLayer, FrameView*);
ScrollingCoordinatorPrivate* m_private;
};
} // namespace WebCore
#endif // ScrollingCoordinatorChromium_h
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