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/DocumentTimeline.h" 36 #include "core/animation/TimedItem.h" 37 38 namespace WebCore { 39 40 PassRefPtr<Player> Player::create(DocumentTimeline* timeline, TimedItem* content) 41 { 42 ASSERT(timeline); 43 return adoptRef(new Player(timeline, content)); 44 } 45 46 Player::Player(DocumentTimeline* timeline, TimedItem* content) 47 : m_pauseStartTime(nullValue()) 48 , m_playbackRate(1) 49 , m_timeDrift(0) 50 , m_startTime(effectiveTime(timeline->currentTime())) 51 , m_content(content) 52 , m_timeline(timeline) 53 { 54 ASSERT(m_startTime >= 0); 55 if (m_content) 56 m_content->attach(this); 57 update(); 58 } 59 60 Player::~Player() 61 { 62 if (m_content) 63 m_content->detach(); 64 } 65 66 double Player::currentTimeBeforeDrift() const 67 { 68 return (effectiveTime(m_timeline->currentTime()) - m_startTime) * m_playbackRate; 69 } 70 71 double Player::pausedTimeDrift() const 72 { 73 ASSERT(paused()); 74 return currentTimeBeforeDrift() - m_pauseStartTime; 75 } 76 77 double Player::timeDrift() const 78 { 79 return paused() ? pausedTimeDrift() : m_timeDrift; 80 } 81 82 double Player::currentTime() const 83 { 84 return currentTimeBeforeDrift() - timeDrift(); 85 } 86 87 bool Player::update() 88 { 89 if (!m_content) 90 return false; 91 92 double newTime = isNull(m_timeline->currentTime()) ? nullValue() : currentTime(); 93 m_content->updateInheritedTime(newTime); 94 return m_content->isCurrent() || m_content->isInEffect(); 95 } 96 97 void Player::cancel() 98 { 99 if (!m_content) 100 return; 101 102 m_content->detach(); 103 m_content = 0; 104 } 105 106 void Player::setCurrentTime(double seekTime) 107 { 108 if (paused()) 109 m_pauseStartTime = seekTime; 110 else 111 m_timeDrift = currentTimeBeforeDrift() - seekTime; 112 113 update(); 114 } 115 116 void Player::setPaused(bool newValue) 117 { 118 if (paused() == newValue) 119 return; 120 121 if (newValue) 122 m_pauseStartTime = currentTime(); 123 else { 124 m_timeDrift = pausedTimeDrift(); 125 m_pauseStartTime = nullValue(); 126 } 127 } 128 129 void Player::setPlaybackRate(double newRate) 130 { 131 double previousTime = currentTime(); 132 m_playbackRate = newRate; 133 setCurrentTime(previousTime); 134 } 135 136 } // namespace 137