1/*
2 * Copyright (C) 2012 Apple Inc. All rights reserved.
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 APPLE INC. AND ITS CONTRIBUTORS ``AS IS''
14 * AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO,
15 * THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR
16 * PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL APPLE INC. OR ITS CONTRIBUTORS
17 * BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR
18 * CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF
19 * SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS
20 * INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN
21 * CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE)
22 * ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF
23 * THE POSSIBILITY OF SUCH DAMAGE.
24 */
25
26#ifndef ScrollingCoordinatorMac_h
27#define ScrollingCoordinatorMac_h
28
29#if ENABLE(ASYNC_SCROLLING) && PLATFORM(MAC)
30
31#include "AsyncScrollingCoordinator.h"
32
33namespace WebCore {
34
35class Scrollbar;
36class ScrollingStateNode;
37class ScrollingStateScrollingNode;
38class ScrollingStateTree;
39class ThreadedScrollingTree;
40
41class ScrollingCoordinatorMac : public AsyncScrollingCoordinator {
42public:
43    explicit ScrollingCoordinatorMac(Page*);
44    virtual ~ScrollingCoordinatorMac();
45
46    virtual void pageDestroyed();
47
48    virtual void commitTreeStateIfNeeded() override;
49
50    // Handle the wheel event on the scrolling thread. Returns whether the event was handled or not.
51    virtual bool handleWheelEvent(FrameView*, const PlatformWheelEvent&) override;
52
53private:
54    virtual void scheduleTreeStateCommit() override;
55
56    void scrollingStateTreeCommitterTimerFired(Timer<ScrollingCoordinatorMac>*);
57    void commitTreeState();
58
59    void updateTiledScrollingIndicator();
60
61    Timer<ScrollingCoordinatorMac> m_scrollingStateTreeCommitterTimer;
62};
63
64} // namespace WebCore
65
66#endif // ENABLE(ASYNC_SCROLLING) && PLATFORM(MAC)
67
68#endif // ScrollingCoordinatorMac_h
69