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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 ScrollingStateFixedNode_h
#define ScrollingStateFixedNode_h
#if ENABLE(THREADED_SCROLLING) || USE(COORDINATED_GRAPHICS)
#include "ScrollingConstraints.h"
#include "ScrollingStateNode.h"
#include <wtf/Forward.h>
namespace WebCore {
class FixedPositionViewportConstraints;
class ScrollingStateFixedNode : public ScrollingStateNode {
public:
static PassOwnPtr<ScrollingStateFixedNode> create(ScrollingStateTree*, ScrollingNodeID);
virtual PassOwnPtr<ScrollingStateNode> clone();
virtual ~ScrollingStateFixedNode();
enum {
ViewportConstraints = NumStateNodeBits
};
void updateConstraints(const FixedPositionViewportConstraints&);
const FixedPositionViewportConstraints& viewportConstraints() const { return m_constraints; }
private:
ScrollingStateFixedNode(ScrollingStateTree*, ScrollingNodeID);
ScrollingStateFixedNode(const ScrollingStateFixedNode&);
virtual bool isFixedNode() OVERRIDE { return true; }
virtual void syncLayerPositionForViewportRect(const LayoutRect& viewportRect) OVERRIDE;
virtual void dumpProperties(TextStream&, int indent) const OVERRIDE;
FixedPositionViewportConstraints m_constraints;
};
inline ScrollingStateFixedNode* toScrollingStateFixedNode(ScrollingStateNode* node)
{
ASSERT_WITH_SECURITY_IMPLICATION(!node || node->isFixedNode());
return static_cast<ScrollingStateFixedNode*>(node);
}
// This will catch anyone doing an unnecessary cast.
void toScrollingStateFixedNode(const ScrollingStateFixedNode*);
} // namespace WebCore
#endif // ENABLE(THREADED_SCROLLING) || USE(COORDINATED_GRAPHICS)
#endif // ScrollingStateFixedNode_h