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/*
* Copyright (C) 2014 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 ScrollingTreeFrameScrollingNode_h
#define ScrollingTreeFrameScrollingNode_h
#if ENABLE(ASYNC_SCROLLING)
#include "ScrollingTreeScrollingNode.h"
namespace WebCore {
class PlatformWheelEvent;
class ScrollingTree;
class ScrollingStateScrollingNode;
class ScrollingTreeFrameScrollingNode : public ScrollingTreeScrollingNode {
public:
virtual ~ScrollingTreeFrameScrollingNode();
virtual void updateBeforeChildren(const ScrollingStateNode&) override;
// FIXME: We should implement this when we support ScrollingTreeScrollingNodes as children.
virtual void updateLayersAfterAncestorChange(const ScrollingTreeNode& /*changedNode*/, const FloatRect& /*fixedPositionRect*/, const FloatSize& /*cumulativeDelta*/) override { }
virtual void handleWheelEvent(const PlatformWheelEvent&) override = 0;
virtual void setScrollPosition(const FloatPoint&) override;
virtual void setScrollPositionWithoutContentEdgeConstraints(const FloatPoint&) override = 0;
virtual void updateLayersAfterViewportChange(const FloatRect& fixedPositionRect, double scale) override = 0;
virtual void updateLayersAfterDelegatedScroll(const FloatPoint&) override { }
SynchronousScrollingReasons synchronousScrollingReasons() const { return m_synchronousScrollingReasons; }
bool shouldUpdateScrollLayerPositionSynchronously() const { return m_synchronousScrollingReasons; }
bool fixedElementsLayoutRelativeToFrame() const { return m_fixedElementsLayoutRelativeToFrame; }
FloatSize viewToContentsOffset(const FloatPoint& scrollPosition) const;
protected:
ScrollingTreeFrameScrollingNode(ScrollingTree&, ScrollingNodeID);
void scrollBy(const FloatSize&);
void scrollByWithoutContentEdgeConstraints(const FloatSize&);
float frameScaleFactor() const { return m_frameScaleFactor; }
int headerHeight() const { return m_headerHeight; }
int footerHeight() const { return m_footerHeight; }
float topContentInset() const { return m_topContentInset; }
ScrollBehaviorForFixedElements scrollBehaviorForFixedElements() const { return m_behaviorForFixed; }
private:
float m_frameScaleFactor { 1 };
float m_topContentInset { 0 };
int m_headerHeight { 0 };
int m_footerHeight { 0 };
SynchronousScrollingReasons m_synchronousScrollingReasons { 0 };
ScrollBehaviorForFixedElements m_behaviorForFixed { StickToDocumentBounds };
bool m_fixedElementsLayoutRelativeToFrame { false };
};
} // namespace WebCore
SPECIALIZE_TYPE_TRAITS_SCROLLING_NODE(ScrollingTreeFrameScrollingNode, isFrameScrollingNode())
#endif // ENABLE(ASYNC_SCROLLING)
#endif // ScrollingTreeScrollingNode_h
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