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
32 #include "config.h"
33 #include "core/animation/Player.h"
34
35 #include "core/animation/Animation.h"
36 #include "core/animation/DocumentTimeline.h"
37
38 namespace WebCore {
39
40 namespace {
41
effectiveTime(double time)42 double effectiveTime(double time) { return isNull(time) ? 0 : time; }
43
44 } // namespace
45
create(DocumentTimeline & timeline,TimedItem * content)46 PassRefPtr<Player> Player::create(DocumentTimeline& timeline, TimedItem* content)
47 {
48 return adoptRef(new Player(timeline, content));
49 }
50
Player(DocumentTimeline & timeline,TimedItem * content)51 Player::Player(DocumentTimeline& timeline, TimedItem* content)
52 : m_pauseStartTime(nullValue())
53 , m_playbackRate(1)
54 , m_timeDrift(0)
55 , m_startTime(nullValue())
56 , m_content(content)
57 , m_timeline(timeline)
58 , m_isPausedForTesting(false)
59 {
60 if (m_content)
61 m_content->attach(this);
62 }
63
~Player()64 Player::~Player()
65 {
66 if (m_content)
67 m_content->detach();
68 }
69
setStartTime(double startTime)70 void Player::setStartTime(double startTime)
71 {
72 ASSERT(!isNull(startTime));
73 ASSERT(!hasStartTime());
74 m_startTime = startTime;
75 update();
76 }
77
currentTimeBeforeDrift() const78 double Player::currentTimeBeforeDrift() const
79 {
80 if (isNull(m_startTime))
81 return 0;
82 return (effectiveTime(m_timeline.currentTime()) - startTime()) * m_playbackRate;
83 }
84
maybeStartAnimationOnCompositor()85 bool Player::maybeStartAnimationOnCompositor()
86 {
87 // FIXME: Support starting compositor animations that have a fixed
88 // start time.
89 ASSERT(!hasStartTime());
90 if (!m_content || !m_content->isAnimation())
91 return false;
92
93 return toAnimation(m_content.get())->maybeStartAnimationOnCompositor();
94 }
95
hasActiveAnimationsOnCompositor()96 bool Player::hasActiveAnimationsOnCompositor()
97 {
98 if (!m_content || !m_content->isAnimation())
99 return false;
100 return toAnimation(m_content.get())->hasActiveAnimationsOnCompositor();
101 }
102
cancelAnimationOnCompositor()103 void Player::cancelAnimationOnCompositor()
104 {
105 if (hasActiveAnimationsOnCompositor())
106 toAnimation(m_content.get())->cancelAnimationOnCompositor();
107 }
108
pausedTimeDrift() const109 double Player::pausedTimeDrift() const
110 {
111 ASSERT(pausedInternal());
112 return currentTimeBeforeDrift() - m_pauseStartTime;
113 }
114
timeDrift() const115 double Player::timeDrift() const
116 {
117 return pausedInternal() ? pausedTimeDrift() : m_timeDrift;
118 }
119
currentTime() const120 double Player::currentTime() const
121 {
122 return currentTimeBeforeDrift() - timeDrift();
123 }
124
update(double * timeToEffectChange,bool * didTriggerStyleRecalc)125 bool Player::update(double* timeToEffectChange, bool* didTriggerStyleRecalc)
126 {
127 if (!m_content) {
128 if (timeToEffectChange)
129 *timeToEffectChange = std::numeric_limits<double>::infinity();
130 if (didTriggerStyleRecalc)
131 *didTriggerStyleRecalc = false;
132 return false;
133 }
134
135 double inheritedTime = isNull(m_timeline.currentTime()) ? nullValue() : currentTime();
136 bool didTriggerStyleRecalcLocal = m_content->updateInheritedTime(inheritedTime);
137
138 if (timeToEffectChange)
139 *timeToEffectChange = m_content->timeToEffectChange();
140 if (didTriggerStyleRecalc)
141 *didTriggerStyleRecalc = didTriggerStyleRecalcLocal;
142 return m_content->isCurrent() || m_content->isInEffect();
143 }
144
cancel()145 void Player::cancel()
146 {
147 if (!m_content)
148 return;
149
150 ASSERT(m_content->player() == this);
151 m_content->detach();
152 m_content = 0;
153 }
154
setCurrentTime(double seekTime)155 void Player::setCurrentTime(double seekTime)
156 {
157 if (pausedInternal())
158 m_pauseStartTime = seekTime;
159 else
160 m_timeDrift = currentTimeBeforeDrift() - seekTime;
161
162 if (m_isPausedForTesting && hasActiveAnimationsOnCompositor())
163 toAnimation(m_content.get())->pauseAnimationForTestingOnCompositor(currentTime());
164 update();
165 }
166
pauseForTesting()167 void Player::pauseForTesting()
168 {
169 RELEASE_ASSERT(!paused());
170 if (!m_isPausedForTesting && hasActiveAnimationsOnCompositor())
171 toAnimation(m_content.get())->pauseAnimationForTestingOnCompositor(currentTime());
172 m_isPausedForTesting = true;
173 setPausedImpl(true);
174 }
175
setPaused(bool newValue)176 void Player::setPaused(bool newValue)
177 {
178 ASSERT(!m_isPausedForTesting);
179 setPausedImpl(newValue);
180 }
181
setPausedImpl(bool newValue)182 void Player::setPausedImpl(bool newValue)
183 {
184 if (pausedInternal() == newValue)
185 return;
186
187 if (newValue) {
188 // FIXME: resume compositor animation rather than pull back to main-thread
189 cancelAnimationOnCompositor();
190 m_pauseStartTime = currentTime();
191 } else {
192 m_timeDrift = pausedTimeDrift();
193 m_pauseStartTime = nullValue();
194 }
195 }
196
setPlaybackRate(double newRate)197 void Player::setPlaybackRate(double newRate)
198 {
199 double previousTime = currentTime();
200 m_playbackRate = newRate;
201 setCurrentTime(previousTime);
202 }
203
204 } // namespace
205