1/*
2 * Copyright (C) 2013 Nokia Corporation and/or its subsidiary(-ies).
3 *
4 * Redistribution and use in source and binary forms, with or without
5 * modification, are permitted provided that the following conditions
6 * are met:
7 * 1. Redistributions of source code must retain the above copyright
8 *    notice, this list of conditions and the following disclaimer.
9 * 2. Redistributions in binary form must reproduce the above copyright
10 *    notice, this list of conditions and the following disclaimer in the
11 *    documentation and/or other materials provided with the distribution.
12 *
13 * THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS ``AS IS'' AND ANY
14 * EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
15 * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR
16 * PURPOSE ARE DISCLAIMED.  IN NO EVENT SHALL THE COPYRIGHT HOLDERS OR
17 * CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL,
18 * EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO,
19 * PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR
20 * PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY
21 * OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
22 * (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE
23 * OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
24 */
25
26#ifndef ScrollingCoordinatorCoordinatedGraphics_h
27#define ScrollingCoordinatorCoordinatedGraphics_h
28
29#if USE(COORDINATED_GRAPHICS)
30
31#include "ScrollingCoordinator.h"
32
33namespace WebCore {
34
35class ScrollingStateTree;
36
37class ScrollingCoordinatorCoordinatedGraphics : public ScrollingCoordinator {
38public:
39    explicit ScrollingCoordinatorCoordinatedGraphics(Page*);
40    virtual ~ScrollingCoordinatorCoordinatedGraphics();
41
42    virtual bool supportsFixedPositionLayers() const OVERRIDE { return true; }
43
44    virtual ScrollingNodeID attachToStateTree(ScrollingNodeType, ScrollingNodeID newNodeID, ScrollingNodeID parentID) OVERRIDE;
45    virtual void detachFromStateTree(ScrollingNodeID) OVERRIDE;
46    virtual void clearStateTree() OVERRIDE;
47
48    virtual void updateViewportConstrainedNode(ScrollingNodeID, const ViewportConstraints&, GraphicsLayer*) OVERRIDE;
49
50    virtual void scrollableAreaScrollLayerDidChange(ScrollableArea*) OVERRIDE;
51    virtual void willDestroyScrollableArea(ScrollableArea*) OVERRIDE;
52
53private:
54    OwnPtr<ScrollingStateTree> m_scrollingStateTree;
55};
56
57} // namespace WebCore
58
59#endif // USE(COORDINATED_GRAPHICS)
60
61#endif // ScrollingCoordinatorCoordinatedGraphics_h
62