1/*
2 * Copyright (C) 2013 Google 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 are
6 * met:
7 *
8 *     * Redistributions of source code must retain the above copyright
9 * notice, this list of conditions and the following disclaimer.
10 *     * Redistributions in binary form must reproduce the above
11 * copyright notice, this list of conditions and the following disclaimer
12 * in the documentation and/or other materials provided with the
13 * distribution.
14 *     * Neither the name of Google Inc. nor the names of its
15 * contributors may be used to endorse or promote products derived from
16 * this software without specific prior written permission.
17 *
18 * THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS
19 * "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT
20 * LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR
21 * A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT
22 * OWNER OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL,
23 * SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT
24 * LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE,
25 * DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY
26 * THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
27 * (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE
28 * OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
29 */
30
31#ifndef CompositorPendingAnimations_h
32#define CompositorPendingAnimations_h
33
34#include "core/animation/AnimationPlayer.h"
35#include "platform/Timer.h"
36#include "platform/heap/Handle.h"
37#include "wtf/Vector.h"
38
39namespace blink {
40
41// Manages the starting of pending animations on the compositor following a
42// compositing update.
43// For CSS Animations, used to synchronize the start of main-thread animations
44// with compositor animations when both classes of CSS Animations are triggered
45// by the same recalc
46class CompositorPendingAnimations FINAL {
47    DISALLOW_ALLOCATION();
48public:
49
50    CompositorPendingAnimations()
51        : m_timer(this, &CompositorPendingAnimations::timerFired)
52    { }
53
54    void add(AnimationPlayer*);
55    // Returns whether we are waiting for an animation to start and should
56    // service again on the next frame.
57    bool update(bool startOnCompositor = true);
58    void notifyCompositorAnimationStarted(double monotonicAnimationStartTime);
59
60    void trace(Visitor*);
61
62private:
63    void timerFired(Timer<CompositorPendingAnimations>*) { update(false); }
64
65    WillBeHeapVector<RefPtrWillBeMember<AnimationPlayer> > m_pending;
66    WillBeHeapVector<RefPtrWillBeMember<AnimationPlayer> > m_waitingForCompositorAnimationStart;
67    Timer<CompositorPendingAnimations> m_timer;
68};
69
70} // namespace blink
71
72#endif
73