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* Copyright (C) 2012 Apple Inc. All rights reserved.
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* Redistribution and use in source and binary forms, with or without
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* modification, are permitted provided that the following conditions
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* 1. Redistributions of source code must retain the above copyright
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* notice, this list of conditions and the following disclaimer.
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* 2. Redistributions in binary form must reproduce the above copyright
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* notice, this list of conditions and the following disclaimer in the
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* documentation and/or other materials provided with the distribution.
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* THIS SOFTWARE IS PROVIDED BY APPLE INC. AND ITS CONTRIBUTORS ``AS IS''
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* AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO,
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* THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR
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* PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL APPLE INC. OR ITS CONTRIBUTORS
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* BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR
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* CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF
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* SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS
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* INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN
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* CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE)
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* ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF
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* THE POSSIBILITY OF SUCH DAMAGE.
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#ifndef ScrollingTreeFixedNode_h
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#define ScrollingTreeFixedNode_h
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#if ENABLE(THREADED_SCROLLING)
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#include "ScrollingConstraints.h"
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#include "ScrollingTreeNode.h"
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#include <wtf/RetainPtr.h>
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class FixedPositionViewportConstraints;
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class ScrollingTreeFixedNode : public ScrollingTreeNode {
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static PassOwnPtr<ScrollingTreeFixedNode> create(ScrollingTree*);
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virtual ~ScrollingTreeFixedNode();
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ScrollingTreeFixedNode(ScrollingTree*);
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virtual void update(ScrollingStateNode*) OVERRIDE;
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virtual void parentScrollPositionDidChange(const IntRect& viewportRect) OVERRIDE;
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FixedPositionViewportConstraints m_constraints;
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RetainPtr<CALayer> m_layer;
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} // namespace WebCore
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#endif // ENABLE(THREADED_SCROLLING)
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#endif // ScrollingTreeFixedNode_h