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
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28 * OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
29 */
30
31 #include "config.h"
32 #include "core/animation/AnimationNode.h"
33
34 #include "core/animation/AnimationNodeTiming.h"
35 #include "core/animation/AnimationPlayer.h"
36 #include "core/animation/TimingCalculations.h"
37
38 namespace blink {
39
40 namespace {
41
resolvedFillMode(Timing::FillMode fillMode,bool isAnimation)42 Timing::FillMode resolvedFillMode(Timing::FillMode fillMode, bool isAnimation)
43 {
44 if (fillMode != Timing::FillModeAuto)
45 return fillMode;
46 if (isAnimation)
47 return Timing::FillModeNone;
48 return Timing::FillModeBoth;
49 }
50
51 } // namespace
52
AnimationNode(const Timing & timing,PassOwnPtrWillBeRawPtr<EventDelegate> eventDelegate)53 AnimationNode::AnimationNode(const Timing& timing, PassOwnPtrWillBeRawPtr<EventDelegate> eventDelegate)
54 : m_parent(nullptr)
55 , m_startTime(0)
56 , m_player(nullptr)
57 , m_timing(timing)
58 , m_eventDelegate(eventDelegate)
59 , m_calculated()
60 , m_needsUpdate(true)
61 , m_lastUpdateTime(nullValue())
62 {
63 m_timing.assertValid();
64 }
65
iterationDuration() const66 double AnimationNode::iterationDuration() const
67 {
68 double result = std::isnan(m_timing.iterationDuration) ? intrinsicIterationDuration() : m_timing.iterationDuration;
69 ASSERT(result >= 0);
70 return result;
71 }
72
repeatedDuration() const73 double AnimationNode::repeatedDuration() const
74 {
75 const double result = multiplyZeroAlwaysGivesZero(iterationDuration(), m_timing.iterationCount);
76 ASSERT(result >= 0);
77 return result;
78 }
79
activeDurationInternal() const80 double AnimationNode::activeDurationInternal() const
81 {
82 const double result = m_timing.playbackRate
83 ? repeatedDuration() / std::abs(m_timing.playbackRate)
84 : std::numeric_limits<double>::infinity();
85 ASSERT(result >= 0);
86 return result;
87 }
88
updateSpecifiedTiming(const Timing & timing)89 void AnimationNode::updateSpecifiedTiming(const Timing& timing)
90 {
91 // FIXME: Test whether the timing is actually different?
92 m_timing = timing;
93 invalidate();
94 if (m_player)
95 m_player->setOutdated();
96 specifiedTimingChanged();
97 }
98
updateInheritedTime(double inheritedTime,TimingUpdateReason reason) const99 void AnimationNode::updateInheritedTime(double inheritedTime, TimingUpdateReason reason) const
100 {
101 bool needsUpdate = m_needsUpdate || (m_lastUpdateTime != inheritedTime && !(isNull(m_lastUpdateTime) && isNull(inheritedTime)));
102 m_needsUpdate = false;
103 m_lastUpdateTime = inheritedTime;
104
105 const double localTime = inheritedTime - m_startTime;
106 double timeToNextIteration = std::numeric_limits<double>::infinity();
107 if (needsUpdate) {
108 const double activeDuration = this->activeDurationInternal();
109
110 const Phase currentPhase = calculatePhase(activeDuration, localTime, m_timing);
111 // FIXME: parentPhase depends on groups being implemented.
112 const AnimationNode::Phase parentPhase = AnimationNode::PhaseActive;
113 const double activeTime = calculateActiveTime(activeDuration, resolvedFillMode(m_timing.fillMode, isAnimation()), localTime, parentPhase, currentPhase, m_timing);
114
115 double currentIteration;
116 double timeFraction;
117 if (const double iterationDuration = this->iterationDuration()) {
118 const double startOffset = multiplyZeroAlwaysGivesZero(m_timing.iterationStart, iterationDuration);
119 ASSERT(startOffset >= 0);
120 const double scaledActiveTime = calculateScaledActiveTime(activeDuration, activeTime, startOffset, m_timing);
121 const double iterationTime = calculateIterationTime(iterationDuration, repeatedDuration(), scaledActiveTime, startOffset, m_timing);
122
123 currentIteration = calculateCurrentIteration(iterationDuration, iterationTime, scaledActiveTime, m_timing);
124 timeFraction = calculateTransformedTime(currentIteration, iterationDuration, iterationTime, m_timing) / iterationDuration;
125
126 if (!isNull(iterationTime)) {
127 timeToNextIteration = (iterationDuration - iterationTime) / std::abs(m_timing.playbackRate);
128 if (activeDuration - activeTime < timeToNextIteration)
129 timeToNextIteration = std::numeric_limits<double>::infinity();
130 }
131 } else {
132 const double localIterationDuration = 1;
133 const double localRepeatedDuration = localIterationDuration * m_timing.iterationCount;
134 ASSERT(localRepeatedDuration >= 0);
135 const double localActiveDuration = m_timing.playbackRate ? localRepeatedDuration / std::abs(m_timing.playbackRate) : std::numeric_limits<double>::infinity();
136 ASSERT(localActiveDuration >= 0);
137 const double localLocalTime = localTime < m_timing.startDelay ? localTime : localActiveDuration + m_timing.startDelay;
138 const AnimationNode::Phase localCurrentPhase = calculatePhase(localActiveDuration, localLocalTime, m_timing);
139 const double localActiveTime = calculateActiveTime(localActiveDuration, resolvedFillMode(m_timing.fillMode, isAnimation()), localLocalTime, parentPhase, localCurrentPhase, m_timing);
140 const double startOffset = m_timing.iterationStart * localIterationDuration;
141 ASSERT(startOffset >= 0);
142 const double scaledActiveTime = calculateScaledActiveTime(localActiveDuration, localActiveTime, startOffset, m_timing);
143 const double iterationTime = calculateIterationTime(localIterationDuration, localRepeatedDuration, scaledActiveTime, startOffset, m_timing);
144
145 currentIteration = calculateCurrentIteration(localIterationDuration, iterationTime, scaledActiveTime, m_timing);
146 timeFraction = calculateTransformedTime(currentIteration, localIterationDuration, iterationTime, m_timing);
147 }
148
149 m_calculated.currentIteration = currentIteration;
150 m_calculated.timeFraction = timeFraction;
151
152 m_calculated.phase = currentPhase;
153 m_calculated.isInEffect = !isNull(activeTime);
154 m_calculated.isInPlay = phase() == PhaseActive && (!m_parent || m_parent->isInPlay());
155 m_calculated.isCurrent = phase() == PhaseBefore || isInPlay() || (m_parent && m_parent->isCurrent());
156 m_calculated.localTime = m_lastUpdateTime - m_startTime;
157 }
158
159 // Test for events even if timing didn't need an update as the player may have gained a start time.
160 // FIXME: Refactor so that we can ASSERT(m_player) here, this is currently required to be nullable for testing.
161 if (reason == TimingUpdateForAnimationFrame && (!m_player || m_player->hasStartTime() || m_player->paused())) {
162 if (m_eventDelegate)
163 m_eventDelegate->onEventCondition(this);
164 }
165
166 if (needsUpdate) {
167 // FIXME: This probably shouldn't be recursive.
168 updateChildrenAndEffects();
169 m_calculated.timeToForwardsEffectChange = calculateTimeToEffectChange(true, localTime, timeToNextIteration);
170 m_calculated.timeToReverseEffectChange = calculateTimeToEffectChange(false, localTime, timeToNextIteration);
171 }
172 }
173
ensureCalculated() const174 const AnimationNode::CalculatedTiming& AnimationNode::ensureCalculated() const
175 {
176 if (!m_player)
177 return m_calculated;
178 if (m_player->outdated())
179 m_player->update(TimingUpdateOnDemand);
180 ASSERT(!m_player->outdated());
181 return m_calculated;
182 }
183
timing()184 PassRefPtrWillBeRawPtr<AnimationNodeTiming> AnimationNode::timing()
185 {
186 return AnimationNodeTiming::create(this);
187 }
188
trace(Visitor * visitor)189 void AnimationNode::trace(Visitor* visitor)
190 {
191 visitor->trace(m_parent);
192 visitor->trace(m_player);
193 visitor->trace(m_eventDelegate);
194 }
195
196 } // namespace blink
197