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 #include "config.h" 32 #include "core/animation/TimedItem.h" 33 #include "core/animation/TimedItemCalculations.h" 34 35 namespace WebCore { 36 37 TimedItem::TimedItem(const Timing& timing, PassOwnPtr<TimedItemEventDelegate> eventDelegate) 38 : m_parent(0) 39 , m_player(0) 40 , m_startTime(0) 41 , m_specified(timing) 42 , m_calculated() 43 , m_eventDelegate(eventDelegate) 44 { 45 timing.assertValid(); 46 } 47 48 void TimedItem::updateInheritedTime(double inheritedTime) const 49 { 50 const double localTime = inheritedTime - m_startTime; 51 const double iterationDuration = m_specified.hasIterationDuration 52 ? m_specified.iterationDuration 53 : intrinsicIterationDuration(); 54 55 const double repeatedDuration = iterationDuration * m_specified.iterationCount; 56 const double activeDuration = m_specified.playbackRate 57 ? repeatedDuration / abs(m_specified.playbackRate) 58 : std::numeric_limits<double>::infinity(); 59 60 const TimedItem::Phase phase = calculatePhase(activeDuration, localTime, m_specified); 61 // FIXME: parentPhase depends on groups being implemented. 62 const TimedItem::Phase parentPhase = TimedItem::PhaseActive; 63 const double activeTime = calculateActiveTime(activeDuration, localTime, parentPhase, phase, m_specified); 64 65 double currentIteration = nullValue(); 66 double timeFraction = nullValue(); 67 ASSERT(iterationDuration >= 0); 68 if (iterationDuration) { 69 const double startOffset = m_specified.iterationStart * iterationDuration; 70 const double scaledActiveTime = calculateScaledActiveTime(activeDuration, activeTime, startOffset, m_specified); 71 const double iterationTime = calculateIterationTime(iterationDuration, repeatedDuration, scaledActiveTime, startOffset, m_specified); 72 73 currentIteration = calculateCurrentIteration(iterationDuration, iterationTime, scaledActiveTime, m_specified); 74 timeFraction = calculateTransformedTime(currentIteration, iterationDuration, iterationTime, m_specified) / iterationDuration; 75 } else { 76 const double iterationDuration = 1; 77 const double repeatedDuration = iterationDuration * m_specified.iterationCount; 78 const double activeDuration = m_specified.playbackRate ? repeatedDuration / abs(m_specified.playbackRate) : std::numeric_limits<double>::infinity(); 79 const double newLocalTime = localTime < m_specified.startDelay ? m_specified.startDelay - 1 : activeDuration + m_specified.startDelay; 80 const TimedItem::Phase phase = calculatePhase(activeDuration, newLocalTime, m_specified); 81 const double activeTime = calculateActiveTime(activeDuration, newLocalTime, parentPhase, phase, m_specified); 82 const double startOffset = m_specified.iterationStart * iterationDuration; 83 const double scaledActiveTime = calculateScaledActiveTime(activeDuration, activeTime, startOffset, m_specified); 84 const double iterationTime = calculateIterationTime(iterationDuration, repeatedDuration, scaledActiveTime, startOffset, m_specified); 85 86 currentIteration = calculateCurrentIteration(iterationDuration, iterationTime, scaledActiveTime, m_specified); 87 timeFraction = calculateTransformedTime(currentIteration, iterationDuration, iterationTime, m_specified); 88 } 89 90 const double lastIteration = m_calculated.currentIteration; 91 m_calculated.currentIteration = currentIteration; 92 m_calculated.activeDuration = activeDuration; 93 m_calculated.timeFraction = timeFraction; 94 95 const bool wasInEffect = m_calculated.isInEffect; 96 const bool wasInPlay = m_calculated.isInPlay; 97 m_calculated.isInEffect = !isNull(activeTime); 98 m_calculated.isInPlay = phase == PhaseActive && (!m_parent || m_parent->isInPlay()); 99 m_calculated.isCurrent = phase == PhaseBefore || isInPlay() || (m_parent && m_parent->isCurrent()); 100 101 if (m_eventDelegate && (isInPlay() != wasInPlay || (isInPlay() && lastIteration != currentIteration))) 102 m_eventDelegate->onEventCondition(wasInPlay, isInPlay(), lastIteration, currentIteration); 103 104 // FIXME: This probably shouldn't be recursive. 105 updateChildrenAndEffects(wasInEffect); 106 } 107 108 TimedItem::CalculatedTiming::CalculatedTiming() 109 : activeDuration(nullValue()) 110 , currentIteration(nullValue()) 111 , timeFraction(nullValue()) 112 , isCurrent(false) 113 , isInEffect(false) 114 , isInPlay(false) 115 { 116 } 117 118 } // namespace WebCore 119
