blob: 7d313616a4ed90b9f7b3c83ccc5bc035c48e8bb9 [file] [log] [blame]
/*
* 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.
*/
#pragma once
#if ENABLE(ASYNC_SCROLLING)
#include "ScrollingConstraints.h"
#include "ScrollingTreeNode.h"
#include <wtf/RetainPtr.h>
OBJC_CLASS CALayer;
namespace WebCore {
class ScrollingTreePositionedNode : public ScrollingTreeNode {
public:
WEBCORE_EXPORT static Ref<ScrollingTreePositionedNode> create(ScrollingTree&, ScrollingNodeID);
virtual ~ScrollingTreePositionedNode();
CALayer *layer() const { return m_layer.get(); }
const Vector<ScrollingNodeID>& relatedOverflowScrollingNodes() const { return m_relatedOverflowScrollingNodes; }
FloatSize scrollDeltaSinceLastCommit() const;
private:
ScrollingTreePositionedNode(ScrollingTree&, ScrollingNodeID);
void commitStateBeforeChildren(const ScrollingStateNode&) override;
void applyLayerPositions() override;
WEBCORE_EXPORT void dumpProperties(WTF::TextStream&, ScrollingStateTreeAsTextBehavior) const override;
Vector<ScrollingNodeID> m_relatedOverflowScrollingNodes;
AbsolutePositionConstraints m_constraints;
RetainPtr<CALayer> m_layer;
};
} // namespace WebCore
SPECIALIZE_TYPE_TRAITS_SCROLLING_NODE(ScrollingTreePositionedNode, isPositionedNode())
#endif // ENABLE(ASYNC_SCROLLING)