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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 ScrollingTreeScrollingNodeMac_h
#define ScrollingTreeScrollingNodeMac_h
#if ENABLE(THREADED_SCROLLING)
#include "ScrollElasticityController.h"
#include "ScrollingTreeScrollingNode.h"
#include <wtf/RetainPtr.h>
OBJC_CLASS CALayer;
namespace WebCore {
class ScrollingTreeScrollingNodeMac : public ScrollingTreeScrollingNode, private ScrollElasticityControllerClient {
public:
explicit ScrollingTreeScrollingNodeMac(ScrollingTree*, ScrollingNodeID);
virtual ~ScrollingTreeScrollingNodeMac();
private:
// ScrollingTreeNode member functions.
virtual void updateBeforeChildren(ScrollingStateNode*) OVERRIDE;
virtual void updateAfterChildren(ScrollingStateNode*) OVERRIDE;
virtual void handleWheelEvent(const PlatformWheelEvent&) OVERRIDE;
// ScrollElasticityController member functions.
virtual bool allowsHorizontalStretching() OVERRIDE;
virtual bool allowsVerticalStretching() OVERRIDE;
virtual IntSize stretchAmount() OVERRIDE;
virtual bool pinnedInDirection(const FloatSize&) OVERRIDE;
virtual bool canScrollHorizontally() OVERRIDE;
virtual bool canScrollVertically() OVERRIDE;
virtual bool shouldRubberBandInDirection(ScrollDirection) OVERRIDE;
virtual IntPoint absoluteScrollPosition() OVERRIDE;
virtual void immediateScrollBy(const FloatSize&) OVERRIDE;
virtual void immediateScrollByWithoutContentEdgeConstraints(const FloatSize&) OVERRIDE;
virtual void startSnapRubberbandTimer() OVERRIDE;
virtual void stopSnapRubberbandTimer() OVERRIDE;
IntPoint scrollPosition() const;
void setScrollPosition(const IntPoint&);
void setScrollPositionWithoutContentEdgeConstraints(const IntPoint&);
void setScrollLayerPosition(const IntPoint&);
IntPoint minimumScrollPosition() const;
IntPoint maximumScrollPosition() const;
void scrollBy(const IntSize&);
void scrollByWithoutContentEdgeConstraints(const IntSize&);
void updateMainFramePinState(const IntPoint& scrollPosition);
void logExposedUnfilledArea();
ScrollElasticityController m_scrollElasticityController;
RetainPtr<CFRunLoopTimerRef> m_snapRubberbandTimer;
RetainPtr<CALayer> m_scrollLayer;
RetainPtr<CALayer> m_counterScrollingLayer;
RetainPtr<CALayer> m_headerLayer;
RetainPtr<CALayer> m_footerLayer;
IntPoint m_probableMainThreadScrollPosition;
bool m_lastScrollHadUnfilledPixels;
};
} // namespace WebCore
#endif // ENABLE(THREADED_SCROLLING)
#endif // ScrollingTreeScrollingNodeMac_h
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