Upstream version 7.36.149.0
[platform/framework/web/crosswalk.git] / src / third_party / WebKit / Source / core / animation / CompositorPendingAnimations.cpp
1 /*
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30
31 #include "config.h"
32 #include "core/animation/CompositorPendingAnimations.h"
33
34 #include "core/animation/Animation.h"
35 #include "core/animation/DocumentTimeline.h"
36 #include "core/frame/FrameView.h"
37 #include "core/page/Page.h"
38 #include "core/rendering/RenderLayer.h"
39
40 namespace WebCore {
41
42 void CompositorPendingAnimations::add(AnimationPlayer* player)
43 {
44     Page* page = player->timeline()->document()->page();
45     bool visible = page && page->visibilityState() == PageVisibilityStateVisible;
46     if (!player->hasStartTime() && !visible)
47         player->setStartTimeInternal(player->timeline()->currentTimeInternal(), true);
48
49     m_pending.append(player);
50 }
51
52 bool CompositorPendingAnimations::startPendingAnimations()
53 {
54     bool startedSynchronizedOnCompositor = false;
55     for (size_t i = 0; i < m_pending.size(); ++i) {
56         if (!m_pending[i]->hasActiveAnimationsOnCompositor() && m_pending[i]->maybeStartAnimationOnCompositor() && !m_pending[i]->hasStartTime())
57             startedSynchronizedOnCompositor = true;
58     }
59
60     // If any synchronized animations were started on the compositor, all
61     // remaning synchronized animations need to wait for the synchronized
62     // start time. Otherwise they may start immediately.
63     if (startedSynchronizedOnCompositor) {
64         for (size_t i = 0; i < m_pending.size(); ++i) {
65             if (!m_pending[i]->hasStartTime()) {
66                 m_waitingForCompositorAnimationStart.append(m_pending[i]);
67             }
68         }
69     } else {
70         for (size_t i = 0; i < m_pending.size(); ++i) {
71             if (!m_pending[i]->hasStartTime()) {
72                 m_pending[i]->setStartTimeInternal(m_pending[i]->timeline()->currentTimeInternal(), true);
73             }
74         }
75     }
76     m_pending.clear();
77
78     if (startedSynchronizedOnCompositor || m_waitingForCompositorAnimationStart.isEmpty())
79         return !m_waitingForCompositorAnimationStart.isEmpty();
80
81     // Check if we're still waiting for any compositor animations to start.
82     for (size_t i = 0; i < m_waitingForCompositorAnimationStart.size(); ++i) {
83         if (m_waitingForCompositorAnimationStart[i].get()->hasActiveAnimationsOnCompositor())
84             return true;
85     }
86
87     // If not, go ahead and start any animations that were waiting.
88     notifyCompositorAnimationStarted(monotonicallyIncreasingTime());
89     return false;
90 }
91
92 void CompositorPendingAnimations::notifyCompositorAnimationStarted(double monotonicAnimationStartTime)
93 {
94     for (size_t i = 0; i < m_waitingForCompositorAnimationStart.size(); ++i) {
95         AnimationPlayer* player = m_waitingForCompositorAnimationStart[i].get();
96         player->setStartTimeInternal(monotonicAnimationStartTime - player->timeline()->zeroTime(), true);
97     }
98
99     m_waitingForCompositorAnimationStart.clear();
100 }
101
102 } // namespace