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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.
*/
#pragma once
#if ENABLE(ASYNC_SCROLLING)
#include "ScrollingConstraints.h"
#include "ScrollingStateNode.h"
#include <wtf/Forward.h>
namespace WebCore {
class StickyPositionViewportConstraints;
class ScrollingStateStickyNode final : public ScrollingStateNode {
public:
static Ref<ScrollingStateStickyNode> create(ScrollingStateTree&, ScrollingNodeID);
Ref<ScrollingStateNode> clone(ScrollingStateTree&) override;
virtual ~ScrollingStateStickyNode();
WEBCORE_EXPORT void updateConstraints(const StickyPositionViewportConstraints&);
const StickyPositionViewportConstraints& viewportConstraints() const { return m_constraints; }
private:
ScrollingStateStickyNode(ScrollingStateTree&, ScrollingNodeID);
ScrollingStateStickyNode(const ScrollingStateStickyNode&, ScrollingStateTree&);
FloatPoint computeLayerPosition(const LayoutRect& viewportRect) const;
void reconcileLayerPositionForViewportRect(const LayoutRect& viewportRect, ScrollingLayerPositionAction) final;
FloatSize scrollDeltaSinceLastCommit(const LayoutRect& viewportRect) const;
void dumpProperties(WTF::TextStream&, OptionSet<ScrollingStateTreeAsTextBehavior>) const final;
OptionSet<ScrollingStateNode::Property> applicableProperties() const final;
StickyPositionViewportConstraints m_constraints;
};
} // namespace WebCore
SPECIALIZE_TYPE_TRAITS_SCROLLING_STATE_NODE(ScrollingStateStickyNode, isStickyNode())
#endif // ENABLE(ASYNC_SCROLLING)