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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) || USE(COORDINATED_GRAPHICS)
#include "ScrollingConstraints.h"
#include "ScrollingStateNode.h"
#include <wtf/Forward.h>
namespace WebCore {
class FixedPositionViewportConstraints;
class ScrollingStateFixedNode final : public ScrollingStateNode {
public:
static Ref<ScrollingStateFixedNode> create(ScrollingStateTree&, ScrollingNodeID);
Ref<ScrollingStateNode> clone(ScrollingStateTree&) override;
virtual ~ScrollingStateFixedNode();
enum {
ViewportConstraints = NumStateNodeBits
};
WEBCORE_EXPORT void updateConstraints(const FixedPositionViewportConstraints&);
const FixedPositionViewportConstraints& viewportConstraints() const { return m_constraints; }
private:
ScrollingStateFixedNode(ScrollingStateTree&, ScrollingNodeID);
ScrollingStateFixedNode(const ScrollingStateFixedNode&, ScrollingStateTree&);
void reconcileLayerPositionForViewportRect(const LayoutRect& viewportRect, ScrollingLayerPositionAction) override;
void dumpProperties(WTF::TextStream&, ScrollingStateTreeAsTextBehavior) const override;
FixedPositionViewportConstraints m_constraints;
};
} // namespace WebCore
SPECIALIZE_TYPE_TRAITS_SCROLLING_STATE_NODE(ScrollingStateFixedNode, isFixedNode())
#endif // ENABLE(ASYNC_SCROLLING) || USE(COORDINATED_GRAPHICS)