Web Animations: Update naming to reflect spec changes

Source/core/animation/AnimationPlayer.cpp

-/*
- * Copyright (C) 2013 Google Inc. All rights reserved.
- *
- * Redistribution and use in source and binary forms, with or without
- * modification, are permitted provided that the following conditions are
- * met:
- *
- *     * Redistributions of source code must retain the above copyright
- * notice, this list of conditions and the following disclaimer.
- *     * Redistributions in binary form must reproduce the above
- * copyright notice, this list of conditions and the following disclaimer
- * in the documentation and/or other materials provided with the
- * distribution.
- *     * Neither the name of Google Inc. nor the names of its
- * contributors may be used to endorse or promote products derived from
- * this software without specific prior written permission.
- *
- * THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS
- * "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT
- * LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR
- * A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT
- * OWNER OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL,
- * SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT
- * LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE,
- * DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY
- * THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
- * (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE
- * OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
- */
-
-#include "config.h"
-#include "core/animation/AnimationPlayer.h"
-
-#include "core/animation/Animation.h"
-#include "core/animation/AnimationTimeline.h"
-#include "core/dom/Document.h"
-#include "core/dom/ExceptionCode.h"
-#include "core/events/AnimationPlayerEvent.h"
-#include "core/frame/UseCounter.h"
-#include "core/inspector/InspectorInstrumentation.h"
-#include "core/inspector/InspectorTraceEvents.h"
-#include "platform/RuntimeEnabledFeatures.h"
-#include "platform/TraceEvent.h"
-#include "public/platform/Platform.h"
-#include "public/platform/WebCompositorAnimationPlayer.h"
-#include "public/platform/WebCompositorSupport.h"
-#include "wtf/MathExtras.h"
-
-namespace blink {
-
-namespace {
-
-static unsigned nextSequenceNumber()
-{
-    static unsigned next = 0;
-    return ++next;
-}
-
-}
-
-PassRefPtrWillBeRawPtr<AnimationPlayer> AnimationPlayer::create(AnimationNode* source, AnimationTimeline* timeline)
-{
-    if (!timeline) {
-        // FIXME: Support creating players without a timeline.
-        return nullptr;
-    }
-
-    RefPtrWillBeRawPtr<AnimationPlayer> player = adoptRefWillBeNoop(new AnimationPlayer(timeline->document()->contextDocument().get(), *timeline, source));
-    player->suspendIfNeeded();
-
-    if (timeline) {
-        timeline->playerAttached(*player);
-        player->attachCompositorTimeline();
-    }
-
-    return player.release();
-}
-
-AnimationPlayer::AnimationPlayer(ExecutionContext* executionContext, AnimationTimeline& timeline, AnimationNode* content)
-    : ActiveDOMObject(executionContext)
-    , m_playState(Idle)
-    , m_playbackRate(1)
-    , m_startTime(nullValue())
-    , m_holdTime(0)
-    , m_sequenceNumber(nextSequenceNumber())
-    , m_content(content)
-    , m_timeline(&timeline)
-    , m_paused(false)
-    , m_held(true)
-    , m_isPausedForTesting(false)
-    , m_outdated(false)
-    , m_finished(true)
-    , m_compositorState(nullptr)
-    , m_compositorPending(false)
-    , m_compositorGroup(0)
-    , m_currentTimePending(false)
-    , m_stateIsBeingUpdated(false)
-{
-    if (m_content) {
-        if (m_content->player()) {
-            m_content->player()->cancel();
-            m_content->player()->setSource(0);
-        }
-        m_content->attach(this);
-    }
-}
-
-AnimationPlayer::~AnimationPlayer()
-{
-#if !ENABLE(OILPAN)
-    if (m_content)
-        m_content->detach();
-    if (m_timeline)
-        m_timeline->playerDestroyed(this);
-#endif
-
-    destroyCompositorPlayer();
-}
-
-#if !ENABLE(OILPAN)
-void AnimationPlayer::detachFromTimeline()
-{
-    dispose();
-    m_timeline = nullptr;
-}
-#endif
-
-double AnimationPlayer::sourceEnd() const
-{
-    return m_content ? m_content->endTimeInternal() : 0;
-}
-
-bool AnimationPlayer::limited(double currentTime) const
-{
-    return (m_playbackRate < 0 && currentTime <= 0) || (m_playbackRate > 0 && currentTime >= sourceEnd());
-}
-
-void AnimationPlayer::setCurrentTime(double newCurrentTime)
-{
-    PlayStateUpdateScope updateScope(*this, TimingUpdateOnDemand);
-
-    m_currentTimePending = false;
-    setCurrentTimeInternal(newCurrentTime / 1000, TimingUpdateOnDemand);
-
-    if (calculatePlayState() == Finished)
-        m_startTime = calculateStartTime(newCurrentTime);
-}
-
-void AnimationPlayer::setCurrentTimeInternal(double newCurrentTime, TimingUpdateReason reason)
-{
-    ASSERT(std::isfinite(newCurrentTime));
-
-    bool oldHeld = m_held;
-    bool outdated = false;
-    bool isLimited = limited(newCurrentTime);
-    m_held = m_paused || !m_playbackRate || isLimited || std::isnan(m_startTime);
-    if (m_held) {
-        if (!oldHeld || m_holdTime != newCurrentTime)
-            outdated = true;
-        m_holdTime = newCurrentTime;
-        if (m_paused || !m_playbackRate) {
-            m_startTime = nullValue();
-        } else if (isLimited && std::isnan(m_startTime) && reason == TimingUpdateForAnimationFrame) {
-            m_startTime = calculateStartTime(newCurrentTime);
-        }
-    } else {
-        m_holdTime = nullValue();
-        m_startTime = calculateStartTime(newCurrentTime);
-        m_finished = false;
-        outdated = true;
-    }
-
-    if (outdated) {
-        setOutdated();
-    }
-}
-
-// Update timing to reflect updated animation clock due to tick
-void AnimationPlayer::updateCurrentTimingState(TimingUpdateReason reason)
-{
-    if (m_held) {
-        double newCurrentTime = m_holdTime;
-        if (playStateInternal() == Finished && !isNull(m_startTime) && m_timeline) {
-            // Add hystersis due to floating point error accumulation
-            if (!limited(calculateCurrentTime() + 0.001 * m_playbackRate)) {
-                // The current time became unlimited, eg. due to a backwards
-                // seek of the timeline.
-                newCurrentTime = calculateCurrentTime();
-            } else if (!limited(m_holdTime)) {
-                // The hold time became unlimited, eg. due to the source content
-                // becoming longer.
-                newCurrentTime = clampTo<double>(calculateCurrentTime(), 0, sourceEnd());
-            }
-        }
-        setCurrentTimeInternal(newCurrentTime, reason);
-    } else if (limited(calculateCurrentTime())) {
-        m_held = true;
-        m_holdTime = m_playbackRate < 0 ? 0 : sourceEnd();
-    }
-}
-
-double AnimationPlayer::startTime(bool& isNull) const
-{
-    double result = startTime();
-    isNull = std::isnan(result);
-    return result;
-}
-
-double AnimationPlayer::startTime() const
-{
-    return m_startTime * 1000;
-}
-
-double AnimationPlayer::currentTime(bool& isNull)
-{
-    double result = currentTime();
-    isNull = std::isnan(result);
-    return result;
-}
-
-double AnimationPlayer::currentTime()
-{
-    PlayStateUpdateScope updateScope(*this, TimingUpdateOnDemand);
-
-    if (m_currentTimePending || playStateInternal() == Idle)
-        return std::numeric_limits<double>::quiet_NaN();
-
-    return currentTimeInternal() * 1000;
-}
-
-double AnimationPlayer::currentTimeInternal() const
-{
-    double result = m_held ? m_holdTime : calculateCurrentTime();
-#if ENABLE(ASSERT)
-    const_cast<AnimationPlayer*>(this)->updateCurrentTimingState(TimingUpdateOnDemand);
-    ASSERT(result == (m_held ? m_holdTime : calculateCurrentTime()));
-#endif
-    return result;
-}
-
-double AnimationPlayer::unlimitedCurrentTimeInternal() const
-{
-#if ENABLE(ASSERT)
-    currentTimeInternal();
-#endif
-    return playStateInternal() == Paused || isNull(m_startTime)
-        ? currentTimeInternal()
-        : calculateCurrentTime();
-}
-
-void AnimationPlayer::preCommit(int compositorGroup, bool startOnCompositor)
-{
-    PlayStateUpdateScope updateScope(*this, TimingUpdateOnDemand, DoNotSetCompositorPending);
-
-    bool softChange = m_compositorState && (paused() || m_compositorState->playbackRate != m_playbackRate);
-    bool hardChange = m_compositorState && (m_compositorState->sourceChanged || m_compositorState->startTime != m_startTime);
-
-    // FIXME: softChange && !hardChange should generate a Pause/ThenStart,
-    // not a Cancel, but we can't communicate these to the compositor yet.
-
-    bool changed = softChange || hardChange;
-    bool shouldCancel = (!playing() && m_compositorState) || changed;
-    bool shouldStart = playing() && (!m_compositorState || changed);
-
-    if (shouldCancel) {
-        cancelAnimationOnCompositor();
-        m_compositorState = nullptr;
-    }
-
-    if (m_compositorState && m_compositorState->pendingAction == Start) {
-        // Still waiting for a start time.
-        return;
-    }
-
-    ASSERT(!m_compositorState || !std::isnan(m_compositorState->startTime));
-
-    if (!shouldStart) {
-        m_currentTimePending = false;
-    }
-
-    if (shouldStart) {
-        m_compositorGroup = compositorGroup;
-        if (startOnCompositor) {
-            if (isCandidateForAnimationOnCompositor())
-                createCompositorPlayer();
-
-            if (maybeStartAnimationOnCompositor())
-                m_compositorState = adoptPtr(new CompositorState(*this));
-            else
-                cancelIncompatibleAnimationsOnCompositor();
-        }
-    }
-}
-
-void AnimationPlayer::postCommit(double timelineTime)
-{
-    PlayStateUpdateScope updateScope(*this, TimingUpdateOnDemand, DoNotSetCompositorPending);
-
-    m_compositorPending = false;
-
-    if (!m_compositorState || m_compositorState->pendingAction == None)
-        return;
-
-    switch (m_compositorState->pendingAction) {
-    case Start:
-        if (!std::isnan(m_compositorState->startTime)) {
-            ASSERT(m_startTime == m_compositorState->startTime);
-            m_compositorState->pendingAction = None;
-        }
-        break;
-    case Pause:
-    case PauseThenStart:
-        ASSERT(std::isnan(m_startTime));
-        m_compositorState->pendingAction = None;
-        setCurrentTimeInternal((timelineTime - m_compositorState->startTime) * m_playbackRate, TimingUpdateForAnimationFrame);
-        m_currentTimePending = false;
-        break;
-    default:
-        ASSERT_NOT_REACHED();
-    }
-}
-
-void AnimationPlayer::notifyCompositorStartTime(double timelineTime)
-{
-    PlayStateUpdateScope updateScope(*this, TimingUpdateOnDemand, DoNotSetCompositorPending);
-
-    if (m_compositorState) {
-        ASSERT(m_compositorState->pendingAction == Start);
-        ASSERT(std::isnan(m_compositorState->startTime));
-
-        double initialCompositorHoldTime = m_compositorState->holdTime;
-        m_compositorState->pendingAction = None;
-        m_compositorState->startTime = timelineTime + currentTimeInternal() / -m_playbackRate;
-
-        if (m_startTime == timelineTime) {
-            // The start time was set to the incoming compositor start time.
-            // Unlikely, but possible.
-            // FIXME: Depending on what changed above this might still be pending.
-            // Maybe...
-            m_currentTimePending = false;
-            return;
-        }
-
-        if (!std::isnan(m_startTime) || currentTimeInternal() != initialCompositorHoldTime) {
-            // A new start time or current time was set while starting.
-            setCompositorPending(true);
-            return;
-        }
-    }
-
-    notifyStartTime(timelineTime);
-}
-
-void AnimationPlayer::notifyStartTime(double timelineTime)
-{
-    if (playing()) {
-        ASSERT(std::isnan(m_startTime));
-        ASSERT(m_held);
-
-        if (m_playbackRate == 0) {
-            setStartTimeInternal(timelineTime);
-        } else {
-            setStartTimeInternal(timelineTime + currentTimeInternal() / -m_playbackRate);
-        }
-
-        // FIXME: This avoids marking this player as outdated needlessly when a start time
-        // is notified, but we should refactor how outdating works to avoid this.
-        m_outdated = false;
-
-        m_currentTimePending = false;
-    }
-}
-
-bool AnimationPlayer::affects(const Element& element, CSSPropertyID property) const
-{
-    if (!m_content || !m_content->isAnimation())
-        return false;
-
-    const Animation* animation = toAnimation(m_content.get());
-    return (animation->target() == &element) && animation->affects(PropertyHandle(property));
-}
-
-double AnimationPlayer::calculateStartTime(double currentTime) const
-{
-    return m_timeline->effectiveTime() - currentTime / m_playbackRate;
-}
-
-double AnimationPlayer::calculateCurrentTime() const
-{
-    if (isNull(m_startTime) || !m_timeline)
-        return 0;
-    return (m_timeline->effectiveTime() - m_startTime) * m_playbackRate;
-}
-
-void AnimationPlayer::setStartTime(double startTime)
-{
-    PlayStateUpdateScope updateScope(*this, TimingUpdateOnDemand);
-
-    if (m_paused || playStateInternal() == Idle)
-        return;
-    if (startTime == m_startTime)
-        return;
-
-    m_currentTimePending = false;
-    setStartTimeInternal(startTime / 1000);
-}
-
-void AnimationPlayer::setStartTimeInternal(double newStartTime)
-{
-    ASSERT(!m_paused);
-    ASSERT(std::isfinite(newStartTime));
-    ASSERT(newStartTime != m_startTime);
-
-    bool hadStartTime = hasStartTime();
-    double previousCurrentTime = currentTimeInternal();
-    m_startTime = newStartTime;
-    if (m_held && m_playbackRate) {
-        // If held, the start time would still be derrived from the hold time.
-        // Force a new, limited, current time.
-        m_held = false;
-        double currentTime = calculateCurrentTime();
-        if (m_playbackRate > 0 && currentTime > sourceEnd()) {
-            currentTime = sourceEnd();
-        } else if (m_playbackRate < 0 && currentTime < 0) {
-            currentTime = 0;
-        }
-        setCurrentTimeInternal(currentTime, TimingUpdateOnDemand);
-    }
-    updateCurrentTimingState(TimingUpdateOnDemand);
-    double newCurrentTime = currentTimeInternal();
-
-    if (previousCurrentTime != newCurrentTime) {
-        setOutdated();
-    } else if (!hadStartTime && m_timeline) {
-        // Even though this player is not outdated, time to effect change is
-        // infinity until start time is set.
-        m_timeline->wake();
-    }
-}
-
-void AnimationPlayer::setSource(AnimationNode* newSource)
-{
-    if (m_content == newSource)
-        return;
-    PlayStateUpdateScope updateScope(*this, TimingUpdateOnDemand, SetCompositorPendingWithSourceChanged);
-
-    double storedCurrentTime = currentTimeInternal();
-    if (m_content)
-        m_content->detach();
-    m_content = newSource;
-    if (newSource) {
-        // FIXME: This logic needs to be updated once groups are implemented
-        if (newSource->player()) {
-            newSource->player()->cancel();
-            newSource->player()->setSource(0);
-        }
-        newSource->attach(this);
-        setOutdated();
-    }
-    setCurrentTimeInternal(storedCurrentTime, TimingUpdateOnDemand);
-}
-
-const char* AnimationPlayer::playStateString(AnimationPlayState playState)
-{
-    switch (playState) {
-    case Idle:
-        return "idle";
-    case Pending:
-        return "pending";
-    case Running:
-        return "running";
-    case Paused:
-        return "paused";
-    case Finished:
-        return "finished";
-    default:
-        ASSERT_NOT_REACHED();
-        return "";
-    }
-}
-
-AnimationPlayer::AnimationPlayState AnimationPlayer::playStateInternal() const
-{
-    return m_playState;
-}
-
-AnimationPlayer::AnimationPlayState AnimationPlayer::calculatePlayState()
-{
-    if (m_playState == Idle)
-        return Idle;
-    if (m_currentTimePending || (isNull(m_startTime) && !m_paused && m_playbackRate != 0))
-        return Pending;
-    if (m_paused)
-        return Paused;
-    if (limited())
-        return Finished;
-    return Running;
-}
-
-void AnimationPlayer::pause()
-{
-    if (m_paused)
-        return;
-
-    PlayStateUpdateScope updateScope(*this, TimingUpdateOnDemand);
-
-    if (playing()) {
-        m_currentTimePending = true;
-    }
-    m_paused = true;
-    setCurrentTimeInternal(currentTimeInternal(), TimingUpdateOnDemand);
-}
-
-void AnimationPlayer::unpause()
-{
-    if (!m_paused)
-        return;
-
-    PlayStateUpdateScope updateScope(*this, TimingUpdateOnDemand);
-
-    m_currentTimePending = true;
-    unpauseInternal();
-}
-
-void AnimationPlayer::unpauseInternal()
-{
-    if (!m_paused)
-        return;
-    m_paused = false;
-    setCurrentTimeInternal(currentTimeInternal(), TimingUpdateOnDemand);
-}
-
-void AnimationPlayer::play()
-{
-    PlayStateUpdateScope updateScope(*this, TimingUpdateOnDemand);
-
-    if (!playing())
-        m_startTime = nullValue();
-
-    if (playStateInternal() == Idle) {
-        // We may not go into the pending state, but setting it to something other
-        // than Idle here will force an update.
-        ASSERT(isNull(m_startTime));
-        m_playState = Pending;
-        m_held = true;
-        m_holdTime = 0;
-    }
-
-    m_finished = false;
-    unpauseInternal();
-    if (!m_content)
-        return;
-    double currentTime = this->currentTimeInternal();
-    if (m_playbackRate > 0 && (currentTime < 0 || currentTime >= sourceEnd())) {
-        m_startTime = nullValue();
-        setCurrentTimeInternal(0, TimingUpdateOnDemand);
-    } else if (m_playbackRate < 0 && (currentTime <= 0 || currentTime > sourceEnd())) {
-        m_startTime = nullValue();
-        setCurrentTimeInternal(sourceEnd(), TimingUpdateOnDemand);
-    }
-}
-
-void AnimationPlayer::reverse()
-{
-    if (!m_playbackRate) {
-        return;
-    }
-
-    setPlaybackRateInternal(-m_playbackRate);
-    play();
-}
-
-void AnimationPlayer::finish(ExceptionState& exceptionState)
-{
-    PlayStateUpdateScope updateScope(*this, TimingUpdateOnDemand);
-
-    if (!m_playbackRate || playStateInternal() == Idle) {
-        return;
-    }
-    if (m_playbackRate > 0 && sourceEnd() == std::numeric_limits<double>::infinity()) {
-        exceptionState.throwDOMException(InvalidStateError, "AnimationPlayer has source content whose end time is infinity.");
-        return;
-    }
-
-    double newCurrentTime = m_playbackRate < 0 ? 0 : sourceEnd();
-    setCurrentTimeInternal(newCurrentTime, TimingUpdateOnDemand);
-    if (!paused()) {
-        m_startTime = calculateStartTime(newCurrentTime);
-    }
-
-    m_currentTimePending = false;
-    ASSERT(playStateInternal() != Idle);
-    ASSERT(limited());
-}
-
-ScriptPromise AnimationPlayer::finished(ScriptState* scriptState)
-{
-    if (!m_finishedPromise) {
-        m_finishedPromise = new AnimationPlayerPromise(scriptState->executionContext(), this, AnimationPlayerPromise::Finished);
-        if (playStateInternal() == Finished)
-            m_finishedPromise->resolve(this);
-    }
-    return m_finishedPromise->promise(scriptState->world());
-}
-
-ScriptPromise AnimationPlayer::ready(ScriptState* scriptState)
-{
-    if (!m_readyPromise) {
-        m_readyPromise = new AnimationPlayerPromise(scriptState->executionContext(), this, AnimationPlayerPromise::Ready);
-        if (playStateInternal() != Pending)
-            m_readyPromise->resolve(this);
-    }
-    return m_readyPromise->promise(scriptState->world());
-}
-
-const AtomicString& AnimationPlayer::interfaceName() const
-{
-    return EventTargetNames::AnimationPlayer;
-}
-
-ExecutionContext* AnimationPlayer::executionContext() const
-{
-    return ActiveDOMObject::executionContext();
-}
-
-bool AnimationPlayer::hasPendingActivity() const
-{
-    return m_pendingFinishedEvent || (!m_finished && hasEventListeners(EventTypeNames::finish));
-}
-
-void AnimationPlayer::stop()
-{
-    PlayStateUpdateScope updateScope(*this, TimingUpdateOnDemand);
-
-    m_finished = true;
-    m_pendingFinishedEvent = nullptr;
-}
-
-bool AnimationPlayer::dispatchEvent(PassRefPtrWillBeRawPtr<Event> event)
-{
-    if (m_pendingFinishedEvent == event)
-        m_pendingFinishedEvent = nullptr;
-    return EventTargetWithInlineData::dispatchEvent(event);
-}
-
-double AnimationPlayer::playbackRate() const
-{
-    return m_playbackRate;
-}
-
-void AnimationPlayer::setPlaybackRate(double playbackRate)
-{
-    if (playbackRate == m_playbackRate)
-        return;
-
-    PlayStateUpdateScope updateScope(*this, TimingUpdateOnDemand);
-
-    setPlaybackRateInternal(playbackRate);
-}
-
-void AnimationPlayer::setPlaybackRateInternal(double playbackRate)
-{
-    ASSERT(std::isfinite(playbackRate));
-    ASSERT(playbackRate != m_playbackRate);
-
-    if (!limited() && !paused() && hasStartTime())
-        m_currentTimePending = true;
-
-    double storedCurrentTime = currentTimeInternal();
-    if ((m_playbackRate < 0 && playbackRate >= 0) || (m_playbackRate > 0 && playbackRate <= 0))
-        m_finished = false;
-
-    m_playbackRate = playbackRate;
-    m_startTime = std::numeric_limits<double>::quiet_NaN();
-    setCurrentTimeInternal(storedCurrentTime, TimingUpdateOnDemand);
-}
-
-void AnimationPlayer::setOutdated()
-{
-    m_outdated = true;
-    if (m_timeline)
-        m_timeline->setOutdatedAnimationPlayer(this);
-}
-
-bool AnimationPlayer::canStartAnimationOnCompositor() const
-{
-    // FIXME: Timeline playback rates should be compositable
-    if (m_playbackRate == 0 || (std::isinf(sourceEnd()) && m_playbackRate < 0) || (timeline() && timeline()->playbackRate() != 1))
-        return false;
-
-    return m_timeline && m_content && m_content->isAnimation() && playing();
-}
-
-bool AnimationPlayer::isCandidateForAnimationOnCompositor() const
-{
-    if (!canStartAnimationOnCompositor())
-        return false;
-
-    return toAnimation(m_content.get())->isCandidateForAnimationOnCompositor(m_playbackRate);
-}
-
-bool AnimationPlayer::maybeStartAnimationOnCompositor()
-{
-    if (!canStartAnimationOnCompositor())
-        return false;
-
-    bool reversed = m_playbackRate < 0;
-
-    double startTime = timeline()->zeroTime() + startTimeInternal();
-    if (reversed) {
-        startTime -= sourceEnd() / fabs(m_playbackRate);
-    }
-
-    double timeOffset = 0;
-    if (std::isnan(startTime)) {
-        timeOffset = reversed ? sourceEnd() - currentTimeInternal() : currentTimeInternal();
-        timeOffset = timeOffset / fabs(m_playbackRate);
-    }
-    ASSERT(m_compositorGroup != 0);
-    return toAnimation(m_content.get())->maybeStartAnimationOnCompositor(m_compositorGroup, startTime, timeOffset, m_playbackRate);
-}
-
-void AnimationPlayer::setCompositorPending(bool sourceChanged)
-{
-    // FIXME: Animation could notify this directly?
-    if (!hasActiveAnimationsOnCompositor()) {
-        destroyCompositorPlayer();
-        m_compositorState.release();
-    }
-    if (sourceChanged && m_compositorState) {
-        m_compositorState->sourceChanged = true;
-    }
-    if (m_compositorPending || m_isPausedForTesting) {
-        return;
-    }
-
-    if (sourceChanged || !m_compositorState
-        || !playing() || m_compositorState->playbackRate != m_playbackRate
-        || m_compositorState->startTime != m_startTime) {
-        m_compositorPending = true;
-        ASSERT(timeline());
-        ASSERT(timeline()->document());
-        timeline()->document()->compositorPendingAnimations().add(this);
-    }
-}
-
-void AnimationPlayer::cancelAnimationOnCompositor()
-{
-    if (hasActiveAnimationsOnCompositor())
-        toAnimation(m_content.get())->cancelAnimationOnCompositor();
-
-    destroyCompositorPlayer();
-}
-
-void AnimationPlayer::restartAnimationOnCompositor()
-{
-    if (hasActiveAnimationsOnCompositor())
-        toAnimation(m_content.get())->restartAnimationOnCompositor();
-}
-
-void AnimationPlayer::cancelIncompatibleAnimationsOnCompositor()
-{
-    if (m_content && m_content->isAnimation())
-        toAnimation(m_content.get())->cancelIncompatibleAnimationsOnCompositor();
-}
-
-bool AnimationPlayer::hasActiveAnimationsOnCompositor()
-{
-    if (!m_content || !m_content->isAnimation())
-        return false;
-
-    return toAnimation(m_content.get())->hasActiveAnimationsOnCompositor();
-}
-
-bool AnimationPlayer::update(TimingUpdateReason reason)
-{
-    if (!m_timeline)
-        return false;
-
-    PlayStateUpdateScope updateScope(*this, reason, DoNotSetCompositorPending);
-
-    m_outdated = false;
-    bool idle = playStateInternal() == Idle;
-
-    if (m_content) {
-        double inheritedTime = idle || isNull(m_timeline->currentTimeInternal()) ? nullValue() : currentTimeInternal();
-        // Special case for end-exclusivity when playing backwards.
-        if (inheritedTime == 0 && m_playbackRate < 0)
-            inheritedTime = -1;
-        m_content->updateInheritedTime(inheritedTime, reason);
-    }
-
-    if ((idle || limited()) && !m_finished) {
-        if (reason == TimingUpdateForAnimationFrame && (idle || hasStartTime())) {
-            const AtomicString& eventType = EventTypeNames::finish;
-            if (executionContext() && hasEventListeners(eventType)) {
-                double eventCurrentTime = currentTimeInternal() * 1000;
-                m_pendingFinishedEvent = AnimationPlayerEvent::create(eventType, eventCurrentTime, timeline()->currentTime());
-                m_pendingFinishedEvent->setTarget(this);
-                m_pendingFinishedEvent->setCurrentTarget(this);
-                m_timeline->document()->enqueueAnimationFrameEvent(m_pendingFinishedEvent);
-            }
-            m_finished = true;
-        }
-    }
-    ASSERT(!m_outdated);
-    return !m_finished;
-}
-
-double AnimationPlayer::timeToEffectChange()
-{
-    ASSERT(!m_outdated);
-    if (m_held || !hasStartTime())
-        return std::numeric_limits<double>::infinity();
-    if (!m_content)
-        return -currentTimeInternal() / m_playbackRate;
-    double result = m_playbackRate > 0
-        ? m_content->timeToForwardsEffectChange() / m_playbackRate
-        : m_content->timeToReverseEffectChange() / -m_playbackRate;
-    return !hasActiveAnimationsOnCompositor() && m_content->phase() == AnimationNode::PhaseActive
-        ? 0
-        : result;
-}
-
-void AnimationPlayer::cancel()
-{
-    PlayStateUpdateScope updateScope(*this, TimingUpdateOnDemand);
-
-    if (playStateInternal() == Idle)
-        return;
-
-    m_holdTime = currentTimeInternal();
-    m_held = true;
-    // TODO
-    m_playState = Idle;
-    m_startTime = nullValue();
-    m_currentTimePending = false;
-
-    InspectorInstrumentation::didCancelAnimationPlayer(timeline()->document(), this);
-}
-
-void AnimationPlayer::beginUpdatingState()
-{
-    // Nested calls are not allowed!
-    ASSERT(!m_stateIsBeingUpdated);
-    m_stateIsBeingUpdated = true;
-}
-
-void AnimationPlayer::endUpdatingState()
-{
-    ASSERT(m_stateIsBeingUpdated);
-    m_stateIsBeingUpdated = false;
-}
-
-void AnimationPlayer::createCompositorPlayer()
-{
-    if (RuntimeEnabledFeatures::compositorAnimationTimelinesEnabled() && !m_compositorPlayer && Platform::current()->compositorSupport()) {
-        m_compositorPlayer = adoptPtr(Platform::current()->compositorSupport()->createAnimationPlayer());
-        ASSERT(m_compositorPlayer);
-        m_compositorPlayer->setAnimationDelegate(this);
-        attachCompositorTimeline();
-    }
-
-    attachCompositedLayers();
-}
-
-void AnimationPlayer::destroyCompositorPlayer()
-{
-    detachCompositedLayers();
-
-    if (m_compositorPlayer) {
-        detachCompositorTimeline();
-        m_compositorPlayer->setAnimationDelegate(nullptr);
-    }
-    m_compositorPlayer.clear();
-}
-
-void AnimationPlayer::attachCompositorTimeline()
-{
-    if (m_compositorPlayer) {
-        WebCompositorAnimationTimeline* timeline = m_timeline ? m_timeline->compositorTimeline() : nullptr;
-        if (timeline)
-            timeline->playerAttached(*this);
-    }
-}
-
-void AnimationPlayer::detachCompositorTimeline()
-{
-    if (m_compositorPlayer) {
-        WebCompositorAnimationTimeline* timeline = m_timeline ? m_timeline->compositorTimeline() : nullptr;
-        if (timeline)
-            timeline->playerDestroyed(*this);
-    }
-}
-
-void AnimationPlayer::attachCompositedLayers()
-{
-    if (!RuntimeEnabledFeatures::compositorAnimationTimelinesEnabled() || !m_compositorPlayer)
-        return;
-
-    ASSERT(m_content);
-    ASSERT(m_content->isAnimation());
-
-    if (toAnimation(m_content.get())->canAttachCompositedLayers())
-        toAnimation(m_content.get())->attachCompositedLayers();
-}
-
-void AnimationPlayer::detachCompositedLayers()
-{
-    if (m_compositorPlayer && m_compositorPlayer->isLayerAttached())
-        m_compositorPlayer->detachLayer();
-}
-
-void AnimationPlayer::notifyAnimationStarted(double monotonicTime, int group)
-{
-    ASSERT(RuntimeEnabledFeatures::compositorAnimationTimelinesEnabled());
-    timeline()->document()->compositorPendingAnimations().notifyCompositorAnimationStarted(monotonicTime, group);
-}
-
-AnimationPlayer::PlayStateUpdateScope::PlayStateUpdateScope(AnimationPlayer& player, TimingUpdateReason reason, CompositorPendingChange compositorPendingChange)
-    : m_player(player)
-    , m_initialPlayState(m_player->playStateInternal())
-    , m_compositorPendingChange(compositorPendingChange)
-{
-    m_player->beginUpdatingState();
-    m_player->updateCurrentTimingState(reason);
-}
-
-AnimationPlayer::PlayStateUpdateScope::~PlayStateUpdateScope()
-{
-    AnimationPlayState oldPlayState = m_initialPlayState;
-    AnimationPlayState newPlayState = m_player->calculatePlayState();
-
-    m_player->m_playState = newPlayState;
-    if (oldPlayState != newPlayState) {
-        bool wasActive = oldPlayState == Pending || oldPlayState == Running;
-        bool isActive = newPlayState == Pending || newPlayState == Running;
-        if (!wasActive && isActive)
-            TRACE_EVENT_NESTABLE_ASYNC_BEGIN1("blink.animations," TRACE_DISABLED_BY_DEFAULT("devtools.timeline"), "Animation", m_player, "data", InspectorAnimationEvent::data(*m_player));
-        else if (wasActive && !isActive)
-            TRACE_EVENT_NESTABLE_ASYNC_END1("blink.animations," TRACE_DISABLED_BY_DEFAULT("devtools.timeline"), "Animation", m_player, "endData", InspectorAnimationStateEvent::data(*m_player));
-        else
-            TRACE_EVENT_NESTABLE_ASYNC_INSTANT1("blink.animations," TRACE_DISABLED_BY_DEFAULT("devtools.timeline"), "Animation", m_player, "data", InspectorAnimationStateEvent::data(*m_player));
-    }
-
-    // Ordering is important, the ready promise should resolve/reject before
-    // the finished promise.
-    if (m_player->m_readyPromise && newPlayState != oldPlayState) {
-        if (newPlayState == Idle) {
-            if (m_player->m_readyPromise->state() == AnimationPlayerPromise::Pending) {
-                m_player->m_readyPromise->reject(DOMException::create(AbortError));
-            }
-            m_player->m_readyPromise->reset();
-            m_player->m_readyPromise->resolve(m_player);
-        } else if (oldPlayState == Pending) {
-            m_player->m_readyPromise->resolve(m_player);
-        } else if (newPlayState == Pending) {
-            ASSERT(m_player->m_readyPromise->state() != AnimationPlayerPromise::Pending);
-            m_player->m_readyPromise->reset();
-        }
-    }
-
-    if (m_player->m_finishedPromise && newPlayState != oldPlayState) {
-        if (newPlayState == Idle) {
-            if (m_player->m_finishedPromise->state() == AnimationPlayerPromise::Pending) {
-                m_player->m_finishedPromise->reject(DOMException::create(AbortError));
-            }
-            m_player->m_finishedPromise->reset();
-        } else if (newPlayState == Finished) {
-            m_player->m_finishedPromise->resolve(m_player);
-        } else if (oldPlayState == Finished) {
-            m_player->m_finishedPromise->reset();
-        }
-    }
-
-    if (oldPlayState != newPlayState && (oldPlayState == Idle || newPlayState == Idle)) {
-        m_player->setOutdated();
-    }
-
-#if ENABLE(ASSERT)
-    // Verify that current time is up to date.
-    m_player->currentTimeInternal();
-#endif
-
-    switch (m_compositorPendingChange) {
-    case SetCompositorPending:
-        m_player->setCompositorPending();
-        break;
-    case SetCompositorPendingWithSourceChanged:
-        m_player->setCompositorPending(true);
-        break;
-    case DoNotSetCompositorPending:
-        break;
-    default:
-        ASSERT_NOT_REACHED();
-        break;
-    }
-    m_player->endUpdatingState();
-
-    if (oldPlayState != newPlayState && newPlayState == Running)
-        InspectorInstrumentation::didCreateAnimationPlayer(m_player->timeline()->document(), m_player);
-}
-
-bool AnimationPlayer::addEventListener(const AtomicString& eventType, PassRefPtr<EventListener> listener, bool useCapture)
-{
-    if (eventType == EventTypeNames::finish)
-        UseCounter::count(executionContext(), UseCounter::AnimationPlayerFinishEvent);
-    return EventTargetWithInlineData::addEventListener(eventType, listener, useCapture);
-}
-
-void AnimationPlayer::pauseForTesting(double pauseTime)
-{
-    RELEASE_ASSERT(!paused());
-    setCurrentTimeInternal(pauseTime, TimingUpdateOnDemand);
-    if (hasActiveAnimationsOnCompositor())
-        toAnimation(m_content.get())->pauseAnimationForTestingOnCompositor(currentTimeInternal());
-    m_isPausedForTesting = true;
-    pause();
-}
-
-DEFINE_TRACE(AnimationPlayer)
-{
-    visitor->trace(m_content);
-    visitor->trace(m_timeline);
-    visitor->trace(m_pendingFinishedEvent);
-    visitor->trace(m_finishedPromise);
-    visitor->trace(m_readyPromise);
-    EventTargetWithInlineData::trace(visitor);
-    ActiveDOMObject::trace(visitor);
-}
-
-} // namespace