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gecko-dev/dom/animation/KeyframeEffect.cpp

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/* -*- Mode: C++; tab-width: 8; indent-tabs-mode: nil; c-basic-offset: 2 -*- */
/* vim: set ts=8 sts=2 et sw=2 tw=80: */
/* This Source Code Form is subject to the terms of the Mozilla Public
* License, v. 2.0. If a copy of the MPL was not distributed with this file,
* You can obtain one at http://mozilla.org/MPL/2.0/. */
#include "mozilla/dom/KeyframeEffect.h"
#include "mozilla/dom/AnimatableBinding.h"
#include "mozilla/dom/KeyframeEffectBinding.h"
#include "mozilla/AnimationUtils.h"
#include "mozilla/FloatingPoint.h"
#include "mozilla/LookAndFeel.h" // For LookAndFeel::GetInt
#include "mozilla/KeyframeUtils.h"
#include "mozilla/StyleAnimationValue.h"
#include "Layers.h" // For Layer
#include "nsComputedDOMStyle.h" // nsComputedDOMStyle::GetStyleContextForElement
#include "nsCSSPropertySet.h"
#include "nsCSSProps.h" // For nsCSSProps::PropHasFlags
#include "nsCSSPseudoElements.h" // For CSSPseudoElementType
#include "nsDOMMutationObserver.h" // For nsAutoAnimationMutationBatch
#include "nsIPresShell.h" // For nsIPresShell
namespace mozilla {
// Helper functions for generating a ComputedTimingProperties dictionary
static void
GetComputedTimingDictionary(const ComputedTiming& aComputedTiming,
const Nullable<TimeDuration>& aLocalTime,
const TimingParams& aTiming,
dom::ComputedTimingProperties& aRetVal)
{
// AnimationEffectTimingProperties
aRetVal.mDelay = aTiming.mDelay.ToMilliseconds();
aRetVal.mEndDelay = aTiming.mEndDelay.ToMilliseconds();
aRetVal.mFill = aComputedTiming.mFill;
aRetVal.mIterations = aComputedTiming.mIterations;
aRetVal.mIterationStart = aComputedTiming.mIterationStart;
aRetVal.mDuration.SetAsUnrestrictedDouble() =
aComputedTiming.mDuration.ToMilliseconds();
aRetVal.mDirection = aTiming.mDirection;
// ComputedTimingProperties
aRetVal.mActiveDuration = aComputedTiming.mActiveDuration.ToMilliseconds();
aRetVal.mEndTime = aComputedTiming.mEndTime.ToMilliseconds();
aRetVal.mLocalTime = AnimationUtils::TimeDurationToDouble(aLocalTime);
aRetVal.mProgress = aComputedTiming.mProgress;
if (!aRetVal.mProgress.IsNull()) {
// Convert the returned currentIteration into Infinity if we set
// (uint64_t) aComputedTiming.mCurrentIteration to UINT64_MAX
double iteration = aComputedTiming.mCurrentIteration == UINT64_MAX
? PositiveInfinity<double>()
: static_cast<double>(aComputedTiming.mCurrentIteration);
aRetVal.mCurrentIteration.SetValue(iteration);
}
}
namespace dom {
NS_IMPL_CYCLE_COLLECTION_INHERITED(KeyframeEffectReadOnly,
AnimationEffectReadOnly,
mTarget,
mAnimation,
mTiming)
NS_IMPL_CYCLE_COLLECTION_TRACE_BEGIN_INHERITED(KeyframeEffectReadOnly,
AnimationEffectReadOnly)
NS_IMPL_CYCLE_COLLECTION_TRACE_END
NS_INTERFACE_MAP_BEGIN_CYCLE_COLLECTION_INHERITED(KeyframeEffectReadOnly)
NS_INTERFACE_MAP_END_INHERITING(AnimationEffectReadOnly)
NS_IMPL_ADDREF_INHERITED(KeyframeEffectReadOnly, AnimationEffectReadOnly)
NS_IMPL_RELEASE_INHERITED(KeyframeEffectReadOnly, AnimationEffectReadOnly)
KeyframeEffectReadOnly::KeyframeEffectReadOnly(
nsIDocument* aDocument,
const Maybe<OwningAnimationTarget>& aTarget,
const TimingParams& aTiming)
: KeyframeEffectReadOnly(aDocument, aTarget,
new AnimationEffectTimingReadOnly(aDocument,
aTiming))
{
}
KeyframeEffectReadOnly::KeyframeEffectReadOnly(
nsIDocument* aDocument,
const Maybe<OwningAnimationTarget>& aTarget,
AnimationEffectTimingReadOnly* aTiming)
: AnimationEffectReadOnly(aDocument)
, mTarget(aTarget)
, mTiming(aTiming)
, mInEffectOnLastAnimationTimingUpdate(false)
, mCumulativeChangeHint(nsChangeHint(0))
{
MOZ_ASSERT(aTiming);
}
JSObject*
KeyframeEffectReadOnly::WrapObject(JSContext* aCx,
JS::Handle<JSObject*> aGivenProto)
{
return KeyframeEffectReadOnlyBinding::Wrap(aCx, this, aGivenProto);
}
IterationCompositeOperation
KeyframeEffectReadOnly::IterationComposite() const
{
return IterationCompositeOperation::Replace;
}
CompositeOperation
KeyframeEffectReadOnly::Composite() const
{
return CompositeOperation::Replace;
}
already_AddRefed<AnimationEffectTimingReadOnly>
KeyframeEffectReadOnly::Timing() const
{
RefPtr<AnimationEffectTimingReadOnly> temp(mTiming);
return temp.forget();
}
void
KeyframeEffectReadOnly::SetSpecifiedTiming(const TimingParams& aTiming)
{
if (mTiming->AsTimingParams() == aTiming) {
return;
}
mTiming->SetTimingParams(aTiming);
if (mAnimation) {
mAnimation->NotifyEffectTimingUpdated();
}
// NotifyEffectTimingUpdated will eventually cause
// NotifyAnimationTimingUpdated to be called on this object which will
// update our registration with the target element.
}
void
KeyframeEffectReadOnly::NotifyAnimationTimingUpdated()
{
UpdateTargetRegistration();
// If the effect is not relevant it will be removed from the target
// element's effect set. However, effects not in the effect set
// will not be included in the set of candidate effects for running on
// the compositor and hence they won't have their compositor status
// updated. As a result, we need to make sure we clear their compositor
// status here.
bool isRelevant = mAnimation && mAnimation->IsRelevant();
if (!isRelevant) {
ResetIsRunningOnCompositor();
}
// Detect changes to "in effect" status since we need to recalculate the
// animation cascade for this element whenever that changes.
bool inEffect = IsInEffect();
if (inEffect != mInEffectOnLastAnimationTimingUpdate) {
if (mTarget) {
EffectSet* effectSet = EffectSet::GetEffectSet(mTarget->mElement,
mTarget->mPseudoType);
if (effectSet) {
effectSet->MarkCascadeNeedsUpdate();
}
}
mInEffectOnLastAnimationTimingUpdate = inEffect;
}
// Request restyle if necessary.
//
// Bug 1216843: When we implement iteration composite modes, we need to
// also detect if the current iteration has changed.
if (mAnimation &&
!mProperties.IsEmpty() &&
GetComputedTiming().mProgress != mProgressOnLastCompose) {
EffectCompositor::RestyleType restyleType =
CanThrottle() ?
EffectCompositor::RestyleType::Throttled :
EffectCompositor::RestyleType::Standard;
RequestRestyle(restyleType);
}
// If we're no longer "in effect", our ComposeStyle method will never be
// called and we will never have a chance to update mProgressOnLastCompose.
// We clear mProgressOnLastCompose here to ensure that if we later become
// "in effect" we will request a restyle (above).
if (!inEffect) {
mProgressOnLastCompose.SetNull();
}
}
Nullable<TimeDuration>
KeyframeEffectReadOnly::GetLocalTime() const
{
// Since the *animation* start time is currently always zero, the local
// time is equal to the parent time.
Nullable<TimeDuration> result;
if (mAnimation) {
result = mAnimation->GetCurrentTime();
}
return result;
}
void
KeyframeEffectReadOnly::GetComputedTimingAsDict(
ComputedTimingProperties& aRetVal) const
{
const Nullable<TimeDuration> currentTime = GetLocalTime();
GetComputedTimingDictionary(GetComputedTimingAt(currentTime,
SpecifiedTiming()),
currentTime,
SpecifiedTiming(),
aRetVal);
}
ComputedTiming
KeyframeEffectReadOnly::GetComputedTimingAt(
const Nullable<TimeDuration>& aLocalTime,
const TimingParams& aTiming)
{
const StickyTimeDuration zeroDuration;
// Always return the same object to benefit from return-value optimization.
ComputedTiming result;
if (aTiming.mDuration) {
MOZ_ASSERT(aTiming.mDuration.ref() >= zeroDuration,
"Iteration duration should be positive");
result.mDuration = aTiming.mDuration.ref();
}
MOZ_ASSERT(aTiming.mIterations >= 0.0 && !IsNaN(aTiming.mIterations),
"mIterations should be nonnegative & finite, as ensured by "
"ValidateIterations or CSSParser");
result.mIterations = aTiming.mIterations;
MOZ_ASSERT(aTiming.mIterationStart >= 0.0,
"mIterationStart should be nonnegative, as ensured by "
"ValidateIterationStart");
result.mIterationStart = aTiming.mIterationStart;
result.mActiveDuration = aTiming.ActiveDuration();
result.mEndTime = aTiming.EndTime();
result.mFill = aTiming.mFill == dom::FillMode::Auto ?
dom::FillMode::None :
aTiming.mFill;
// The default constructor for ComputedTiming sets all other members to
// values consistent with an animation that has not been sampled.
if (aLocalTime.IsNull()) {
return result;
}
const TimeDuration& localTime = aLocalTime.Value();
// Calculate the time within the active interval.
// https://w3c.github.io/web-animations/#active-time
StickyTimeDuration activeTime;
if (localTime >=
std::min(StickyTimeDuration(aTiming.mDelay + result.mActiveDuration),
result.mEndTime)) {
result.mPhase = ComputedTiming::AnimationPhase::After;
if (!result.FillsForwards()) {
// The animation isn't active or filling at this time.
return result;
}
activeTime = result.mActiveDuration;
} else if (localTime <
std::min(StickyTimeDuration(aTiming.mDelay), result.mEndTime)) {
result.mPhase = ComputedTiming::AnimationPhase::Before;
if (!result.FillsBackwards()) {
// The animation isn't active or filling at this time.
return result;
}
// activeTime is zero
} else {
MOZ_ASSERT(result.mActiveDuration != zeroDuration,
"How can we be in the middle of a zero-duration interval?");
result.mPhase = ComputedTiming::AnimationPhase::Active;
activeTime = localTime - aTiming.mDelay;
}
// Convert active time to a multiple of iterations.
// https://w3c.github.io/web-animations/#overall-progress
double overallProgress;
if (result.mDuration == zeroDuration) {
overallProgress = result.mPhase == ComputedTiming::AnimationPhase::Before
? 0.0
: result.mIterations;
} else {
overallProgress = activeTime / result.mDuration;
}
// Factor in iteration start offset.
if (IsFinite(overallProgress)) {
overallProgress += result.mIterationStart;
}
// Determine the 0-based index of the current iteration.
// https://w3c.github.io/web-animations/#current-iteration
result.mCurrentIteration =
IsInfinite(result.mIterations) &&
result.mPhase == ComputedTiming::AnimationPhase::After
? UINT64_MAX // In GetComputedTimingDictionary(),
// we will convert this into Infinity
: static_cast<uint64_t>(overallProgress);
// Convert the overall progress to a fraction of a single iteration--the
// simply iteration progress.
// https://w3c.github.io/web-animations/#simple-iteration-progress
double progress = IsFinite(overallProgress)
? fmod(overallProgress, 1.0)
: fmod(result.mIterationStart, 1.0);
// When we finish exactly at the end of an iteration we need to report
// the end of the final iteration and not the start of the next iteration.
if (result.mPhase == ComputedTiming::AnimationPhase::After &&
progress == 0.0 &&
result.mIterations != 0.0) {
progress = 1.0;
if (result.mCurrentIteration != UINT64_MAX) {
result.mCurrentIteration--;
}
}
// Factor in the direction.
bool thisIterationReverse = false;
switch (aTiming.mDirection) {
case PlaybackDirection::Normal:
thisIterationReverse = false;
break;
case PlaybackDirection::Reverse:
thisIterationReverse = true;
break;
case PlaybackDirection::Alternate:
thisIterationReverse = (result.mCurrentIteration & 1) == 1;
break;
case PlaybackDirection::Alternate_reverse:
thisIterationReverse = (result.mCurrentIteration & 1) == 0;
break;
default:
MOZ_ASSERT(true, "Unknown PlaybackDirection type");
}
if (thisIterationReverse) {
progress = 1.0 - progress;
}
// Calculate the 'before flag' which we use when applying step timing
// functions.
if ((result.mPhase == ComputedTiming::AnimationPhase::After &&
thisIterationReverse) ||
(result.mPhase == ComputedTiming::AnimationPhase::Before &&
!thisIterationReverse)) {
result.mBeforeFlag = ComputedTimingFunction::BeforeFlag::Set;
}
// Apply the easing.
if (aTiming.mFunction) {
progress = aTiming.mFunction->GetValue(progress, result.mBeforeFlag);
}
MOZ_ASSERT(IsFinite(progress), "Progress value should be finite");
result.mProgress.SetValue(progress);
return result;
}
// https://w3c.github.io/web-animations/#in-play
bool
KeyframeEffectReadOnly::IsInPlay() const
{
if (!mAnimation || mAnimation->PlayState() == AnimationPlayState::Finished) {
return false;
}
return GetComputedTiming().mPhase == ComputedTiming::AnimationPhase::Active;
}
// https://w3c.github.io/web-animations/#current
bool
KeyframeEffectReadOnly::IsCurrent() const
{
if (!mAnimation || mAnimation->PlayState() == AnimationPlayState::Finished) {
return false;
}
ComputedTiming computedTiming = GetComputedTiming();
return computedTiming.mPhase == ComputedTiming::AnimationPhase::Before ||
computedTiming.mPhase == ComputedTiming::AnimationPhase::Active;
}
// https://w3c.github.io/web-animations/#in-effect
bool
KeyframeEffectReadOnly::IsInEffect() const
{
ComputedTiming computedTiming = GetComputedTiming();
return !computedTiming.mProgress.IsNull();
}
void
KeyframeEffectReadOnly::SetAnimation(Animation* aAnimation)
{
mAnimation = aAnimation;
NotifyAnimationTimingUpdated();
}
static bool
KeyframesEqualIgnoringComputedOffsets(const nsTArray<Keyframe>& aLhs,
const nsTArray<Keyframe>& aRhs)
{
if (aLhs.Length() != aRhs.Length()) {
return false;
}
for (size_t i = 0, len = aLhs.Length(); i < len; ++i) {
const Keyframe& a = aLhs[i];
const Keyframe& b = aRhs[i];
if (a.mOffset != b.mOffset ||
a.mTimingFunction != b.mTimingFunction ||
a.mPropertyValues != b.mPropertyValues) {
return false;
}
}
return true;
}
// https://w3c.github.io/web-animations/#dom-keyframeeffect-setkeyframes
void
KeyframeEffectReadOnly::SetKeyframes(JSContext* aContext,
JS::Handle<JSObject*> aKeyframes,
ErrorResult& aRv)
{
nsIDocument* doc = AnimationUtils::GetCurrentRealmDocument(aContext);
if (!doc) {
aRv.Throw(NS_ERROR_FAILURE);
return;
}
nsTArray<Keyframe> keyframes =
KeyframeUtils::GetKeyframesFromObject(aContext, aKeyframes, aRv);
if (aRv.Failed()) {
return;
}
RefPtr<nsStyleContext> styleContext;
nsIPresShell* shell = doc->GetShell();
if (shell && mTarget) {
nsIAtom* pseudo =
mTarget->mPseudoType < CSSPseudoElementType::Count ?
nsCSSPseudoElements::GetPseudoAtom(mTarget->mPseudoType) : nullptr;
styleContext =
nsComputedDOMStyle::GetStyleContextForElement(mTarget->mElement,
pseudo, shell);
}
SetKeyframes(Move(keyframes), styleContext);
}
void
KeyframeEffectReadOnly::SetKeyframes(nsTArray<Keyframe>&& aKeyframes,
nsStyleContext* aStyleContext)
{
if (KeyframesEqualIgnoringComputedOffsets(aKeyframes, mKeyframes)) {
return;
}
mKeyframes = Move(aKeyframes);
KeyframeUtils::ApplyDistributeSpacing(mKeyframes);
if (mAnimation && mAnimation->IsRelevant()) {
nsNodeUtils::AnimationChanged(mAnimation);
}
if (aStyleContext) {
UpdateProperties(aStyleContext);
}
}
const AnimationProperty*
KeyframeEffectReadOnly::GetAnimationOfProperty(nsCSSProperty aProperty) const
{
for (size_t propIdx = 0, propEnd = mProperties.Length();
propIdx != propEnd; ++propIdx) {
if (aProperty == mProperties[propIdx].mProperty) {
const AnimationProperty* result = &mProperties[propIdx];
if (!result->mWinsInCascade) {
result = nullptr;
}
return result;
}
}
return nullptr;
}
bool
KeyframeEffectReadOnly::HasAnimationOfProperties(
const nsCSSProperty* aProperties,
size_t aPropertyCount) const
{
for (size_t i = 0; i < aPropertyCount; i++) {
if (HasAnimationOfProperty(aProperties[i])) {
return true;
}
}
return false;
}
void
KeyframeEffectReadOnly::UpdateProperties(nsStyleContext* aStyleContext)
{
MOZ_ASSERT(aStyleContext);
nsTArray<AnimationProperty> properties;
if (mTarget) {
properties =
KeyframeUtils::GetAnimationPropertiesFromKeyframes(aStyleContext,
mTarget->mElement,
mTarget->mPseudoType,
mKeyframes);
}
if (mProperties == properties) {
return;
}
// Preserve the state of mWinsInCascade and mIsRunningOnCompositor flags.
nsCSSPropertySet winningInCascadeProperties;
nsCSSPropertySet runningOnCompositorProperties;
for (const AnimationProperty& property : mProperties) {
if (property.mWinsInCascade) {
winningInCascadeProperties.AddProperty(property.mProperty);
}
if (property.mIsRunningOnCompositor) {
runningOnCompositorProperties.AddProperty(property.mProperty);
}
}
mProperties = Move(properties);
for (AnimationProperty& property : mProperties) {
property.mWinsInCascade =
winningInCascadeProperties.HasProperty(property.mProperty);
property.mIsRunningOnCompositor =
runningOnCompositorProperties.HasProperty(property.mProperty);
}
CalculateCumulativeChangeHint();
if (mTarget) {
EffectSet* effectSet = EffectSet::GetEffectSet(mTarget->mElement,
mTarget->mPseudoType);
if (effectSet) {
effectSet->MarkCascadeNeedsUpdate();
}
RequestRestyle(EffectCompositor::RestyleType::Layer);
}
}
void
KeyframeEffectReadOnly::ComposeStyle(RefPtr<AnimValuesStyleRule>& aStyleRule,
nsCSSPropertySet& aSetProperties)
{
ComputedTiming computedTiming = GetComputedTiming();
mProgressOnLastCompose = computedTiming.mProgress;
// If the progress is null, we don't have fill data for the current
// time so we shouldn't animate.
if (computedTiming.mProgress.IsNull()) {
return;
}
for (size_t propIdx = 0, propEnd = mProperties.Length();
propIdx != propEnd; ++propIdx)
{
const AnimationProperty& prop = mProperties[propIdx];
MOZ_ASSERT(prop.mSegments[0].mFromKey == 0.0, "incorrect first from key");
MOZ_ASSERT(prop.mSegments[prop.mSegments.Length() - 1].mToKey == 1.0,
"incorrect last to key");
if (aSetProperties.HasProperty(prop.mProperty)) {
// Animations are composed by EffectCompositor by iterating
// from the last animation to first. For animations targetting the
// same property, the later one wins. So if this property is already set,
// we should not override it.
continue;
}
if (!prop.mWinsInCascade) {
// This isn't the winning declaration, so don't add it to style.
// For transitions, this is important, because it's how we
// implement the rule that CSS transitions don't run when a CSS
// animation is running on the same property and element. For
// animations, this is only skipping things that will otherwise be
// overridden.
continue;
}
aSetProperties.AddProperty(prop.mProperty);
MOZ_ASSERT(prop.mSegments.Length() > 0,
"property should not be in animations if it has no segments");
// FIXME: Maybe cache the current segment?
const AnimationPropertySegment *segment = prop.mSegments.Elements(),
*segmentEnd = segment + prop.mSegments.Length();
while (segment->mToKey <= computedTiming.mProgress.Value()) {
MOZ_ASSERT(segment->mFromKey <= segment->mToKey, "incorrect keys");
if ((segment+1) == segmentEnd) {
break;
}
++segment;
MOZ_ASSERT(segment->mFromKey == (segment-1)->mToKey, "incorrect keys");
}
MOZ_ASSERT(segment->mFromKey <= segment->mToKey, "incorrect keys");
MOZ_ASSERT(segment >= prop.mSegments.Elements() &&
size_t(segment - prop.mSegments.Elements()) <
prop.mSegments.Length(),
"out of array bounds");
if (!aStyleRule) {
// Allocate the style rule now that we know we have animation data.
aStyleRule = new AnimValuesStyleRule();
}
// Special handling for zero-length segments
if (segment->mToKey == segment->mFromKey) {
if (computedTiming.mProgress.Value() < 0) {
aStyleRule->AddValue(prop.mProperty, segment->mFromValue);
} else {
aStyleRule->AddValue(prop.mProperty, segment->mToValue);
}
continue;
}
double positionInSegment =
(computedTiming.mProgress.Value() - segment->mFromKey) /
(segment->mToKey - segment->mFromKey);
double valuePosition =
ComputedTimingFunction::GetPortion(segment->mTimingFunction,
positionInSegment,
computedTiming.mBeforeFlag);
StyleAnimationValue val;
if (StyleAnimationValue::Interpolate(prop.mProperty,
segment->mFromValue,
segment->mToValue,
valuePosition, val)) {
aStyleRule->AddValue(prop.mProperty, Move(val));
} else if (valuePosition < 0.5) {
aStyleRule->AddValue(prop.mProperty, segment->mFromValue);
} else {
aStyleRule->AddValue(prop.mProperty, segment->mToValue);
}
}
}
bool
KeyframeEffectReadOnly::IsRunningOnCompositor() const
{
// We consider animation is running on compositor if there is at least
// one property running on compositor.
// Animation.IsRunningOnCompotitor will return more fine grained
// information in bug 1196114.
for (const AnimationProperty& property : mProperties) {
if (property.mIsRunningOnCompositor) {
return true;
}
}
return false;
}
void
KeyframeEffectReadOnly::SetIsRunningOnCompositor(nsCSSProperty aProperty,
bool aIsRunning)
{
MOZ_ASSERT(nsCSSProps::PropHasFlags(aProperty,
CSS_PROPERTY_CAN_ANIMATE_ON_COMPOSITOR),
"Property being animated on compositor is a recognized "
"compositor-animatable property");
for (AnimationProperty& property : mProperties) {
if (property.mProperty == aProperty) {
property.mIsRunningOnCompositor = aIsRunning;
// We currently only set a performance warning message when animations
// cannot be run on the compositor, so if this animation is running
// on the compositor we don't need a message.
if (aIsRunning) {
property.mPerformanceWarning.reset();
}
return;
}
}
}
void
KeyframeEffectReadOnly::ResetIsRunningOnCompositor()
{
for (AnimationProperty& property : mProperties) {
property.mIsRunningOnCompositor = false;
}
}
KeyframeEffectReadOnly::~KeyframeEffectReadOnly()
{
}
static Maybe<OwningAnimationTarget>
ConvertTarget(const Nullable<ElementOrCSSPseudoElement>& aTarget)
{
// Return value optimization.
Maybe<OwningAnimationTarget> result;
if (aTarget.IsNull()) {
return result;
}
const ElementOrCSSPseudoElement& target = aTarget.Value();
MOZ_ASSERT(target.IsElement() || target.IsCSSPseudoElement(),
"Uninitialized target");
if (target.IsElement()) {
result.emplace(&target.GetAsElement());
} else {
RefPtr<Element> elem = target.GetAsCSSPseudoElement().ParentElement();
result.emplace(elem, target.GetAsCSSPseudoElement().GetType());
}
return result;
}
template <class KeyframeEffectType, class OptionsType>
/* static */ already_AddRefed<KeyframeEffectType>
KeyframeEffectReadOnly::ConstructKeyframeEffect(
const GlobalObject& aGlobal,
const Nullable<ElementOrCSSPseudoElement>& aTarget,
JS::Handle<JSObject*> aKeyframes,
const OptionsType& aOptions,
ErrorResult& aRv)
{
nsIDocument* doc = AnimationUtils::GetCurrentRealmDocument(aGlobal.Context());
if (!doc) {
aRv.Throw(NS_ERROR_FAILURE);
return nullptr;
}
TimingParams timingParams =
TimingParams::FromOptionsUnion(aOptions, doc, aRv);
if (aRv.Failed()) {
return nullptr;
}
Maybe<OwningAnimationTarget> target = ConvertTarget(aTarget);
RefPtr<KeyframeEffectType> effect =
new KeyframeEffectType(doc, target, timingParams);
effect->SetKeyframes(aGlobal.Context(), aKeyframes, aRv);
if (aRv.Failed()) {
return nullptr;
}
return effect.forget();
}
void
KeyframeEffectReadOnly::ResetWinsInCascade()
{
for (AnimationProperty& property : mProperties) {
property.mWinsInCascade = false;
}
}
void
KeyframeEffectReadOnly::UpdateTargetRegistration()
{
if (!mTarget) {
return;
}
bool isRelevant = mAnimation && mAnimation->IsRelevant();
// Animation::IsRelevant() returns a cached value. It only updates when
// something calls Animation::UpdateRelevance. Whenever our timing changes,
// we should be notifying our Animation before calling this, so
// Animation::IsRelevant() should be up-to-date by the time we get here.
MOZ_ASSERT(isRelevant == IsCurrent() || IsInEffect(),
"Out of date Animation::IsRelevant value");
if (isRelevant) {
EffectSet* effectSet =
EffectSet::GetOrCreateEffectSet(mTarget->mElement, mTarget->mPseudoType);
effectSet->AddEffect(*this);
} else {
UnregisterTarget();
}
}
void
KeyframeEffectReadOnly::UnregisterTarget()
{
EffectSet* effectSet =
EffectSet::GetEffectSet(mTarget->mElement, mTarget->mPseudoType);
if (effectSet) {
effectSet->RemoveEffect(*this);
if (effectSet->IsEmpty()) {
EffectSet::DestroyEffectSet(mTarget->mElement, mTarget->mPseudoType);
}
}
}
void
KeyframeEffectReadOnly::RequestRestyle(
EffectCompositor::RestyleType aRestyleType)
{
nsPresContext* presContext = GetPresContext();
if (presContext && mTarget && mAnimation) {
presContext->EffectCompositor()->
RequestRestyle(mTarget->mElement, mTarget->mPseudoType,
aRestyleType, mAnimation->CascadeLevel());
}
}
#ifdef DEBUG
void
DumpAnimationProperties(nsTArray<AnimationProperty>& aAnimationProperties)
{
for (auto& p : aAnimationProperties) {
printf("%s\n", nsCSSProps::GetStringValue(p.mProperty).get());
for (auto& s : p.mSegments) {
nsString fromValue, toValue;
StyleAnimationValue::UncomputeValue(p.mProperty,
s.mFromValue,
fromValue);
StyleAnimationValue::UncomputeValue(p.mProperty,
s.mToValue,
toValue);
printf(" %f..%f: %s..%s\n", s.mFromKey, s.mToKey,
NS_ConvertUTF16toUTF8(fromValue).get(),
NS_ConvertUTF16toUTF8(toValue).get());
}
}
}
#endif
/* static */ already_AddRefed<KeyframeEffectReadOnly>
KeyframeEffectReadOnly::Constructor(
const GlobalObject& aGlobal,
const Nullable<ElementOrCSSPseudoElement>& aTarget,
JS::Handle<JSObject*> aKeyframes,
const UnrestrictedDoubleOrKeyframeEffectOptions& aOptions,
ErrorResult& aRv)
{
return ConstructKeyframeEffect<KeyframeEffectReadOnly>(aGlobal, aTarget,
aKeyframes, aOptions,
aRv);
}
void
KeyframeEffectReadOnly::GetTarget(
Nullable<OwningElementOrCSSPseudoElement>& aRv) const
{
if (!mTarget) {
aRv.SetNull();
return;
}
switch (mTarget->mPseudoType) {
case CSSPseudoElementType::before:
case CSSPseudoElementType::after:
aRv.SetValue().SetAsCSSPseudoElement() =
CSSPseudoElement::GetCSSPseudoElement(mTarget->mElement,
mTarget->mPseudoType);
break;
case CSSPseudoElementType::NotPseudo:
aRv.SetValue().SetAsElement() = mTarget->mElement;
break;
default:
NS_NOTREACHED("Animation of unsupported pseudo-type");
aRv.SetNull();
}
}
static void
CreatePropertyValue(nsCSSProperty aProperty,
float aOffset,
const Maybe<ComputedTimingFunction>& aTimingFunction,
const StyleAnimationValue& aValue,
AnimationPropertyValueDetails& aResult)
{
aResult.mOffset = aOffset;
nsString stringValue;
StyleAnimationValue::UncomputeValue(aProperty, aValue, stringValue);
aResult.mValue = stringValue;
if (aTimingFunction) {
aResult.mEasing.Construct();
aTimingFunction->AppendToString(aResult.mEasing.Value());
} else {
aResult.mEasing.Construct(NS_LITERAL_STRING("linear"));
}
aResult.mComposite = CompositeOperation::Replace;
}
void
KeyframeEffectReadOnly::GetProperties(
nsTArray<AnimationPropertyDetails>& aProperties,
ErrorResult& aRv) const
{
for (const AnimationProperty& property : mProperties) {
AnimationPropertyDetails propertyDetails;
propertyDetails.mProperty =
NS_ConvertASCIItoUTF16(nsCSSProps::GetStringValue(property.mProperty));
propertyDetails.mRunningOnCompositor = property.mIsRunningOnCompositor;
nsXPIDLString localizedString;
if (property.mPerformanceWarning &&
property.mPerformanceWarning->ToLocalizedString(localizedString)) {
propertyDetails.mWarning.Construct(localizedString);
}
if (!propertyDetails.mValues.SetCapacity(property.mSegments.Length(),
mozilla::fallible)) {
aRv.Throw(NS_ERROR_OUT_OF_MEMORY);
return;
}
for (size_t segmentIdx = 0, segmentLen = property.mSegments.Length();
segmentIdx < segmentLen;
segmentIdx++)
{
const AnimationPropertySegment& segment = property.mSegments[segmentIdx];
binding_detail::FastAnimationPropertyValueDetails fromValue;
CreatePropertyValue(property.mProperty, segment.mFromKey,
segment.mTimingFunction, segment.mFromValue,
fromValue);
// We don't apply timing functions for zero-length segments, so
// don't return one here.
if (segment.mFromKey == segment.mToKey) {
fromValue.mEasing.Reset();
}
// The following won't fail since we have already allocated the capacity
// above.
propertyDetails.mValues.AppendElement(fromValue, mozilla::fallible);
// Normally we can ignore the to-value for this segment since it is
// identical to the from-value from the next segment. However, we need
// to add it if either:
// a) this is the last segment, or
// b) the next segment's from-value differs.
if (segmentIdx == segmentLen - 1 ||
property.mSegments[segmentIdx + 1].mFromValue != segment.mToValue) {
binding_detail::FastAnimationPropertyValueDetails toValue;
CreatePropertyValue(property.mProperty, segment.mToKey,
Nothing(), segment.mToValue, toValue);
// It doesn't really make sense to have a timing function on the
// last property value or before a sudden jump so we just drop the
// easing property altogether.
toValue.mEasing.Reset();
propertyDetails.mValues.AppendElement(toValue, mozilla::fallible);
}
}
aProperties.AppendElement(propertyDetails);
}
}
void
KeyframeEffectReadOnly::GetKeyframes(JSContext*& aCx,
nsTArray<JSObject*>& aResult,
ErrorResult& aRv)
{
MOZ_ASSERT(aResult.IsEmpty());
MOZ_ASSERT(!aRv.Failed());
if (!aResult.SetCapacity(mKeyframes.Length(), mozilla::fallible)) {
aRv.Throw(NS_ERROR_OUT_OF_MEMORY);
return;
}
for (const Keyframe& keyframe : mKeyframes) {
// Set up a dictionary object for the explicit members
BaseComputedKeyframe keyframeDict;
if (keyframe.mOffset) {
keyframeDict.mOffset.SetValue(keyframe.mOffset.value());
}
keyframeDict.mComputedOffset.Construct(keyframe.mComputedOffset);
if (keyframe.mTimingFunction) {
keyframeDict.mEasing.Truncate();
keyframe.mTimingFunction.ref().AppendToString(keyframeDict.mEasing);
} // else if null, leave easing as its default "linear".
JS::Rooted<JS::Value> keyframeJSValue(aCx);
if (!ToJSValue(aCx, keyframeDict, &keyframeJSValue)) {
aRv.Throw(NS_ERROR_FAILURE);
return;
}
JS::Rooted<JSObject*> keyframeObject(aCx, &keyframeJSValue.toObject());
for (const PropertyValuePair& propertyValue : keyframe.mPropertyValues) {
const char* name = nsCSSProps::PropertyIDLName(propertyValue.mProperty);
// nsCSSValue::AppendToString does not accept shorthands properties but
// works with token stream values if we pass eCSSProperty_UNKNOWN as
// the property.
nsCSSProperty propertyForSerializing =
nsCSSProps::IsShorthand(propertyValue.mProperty)
? eCSSProperty_UNKNOWN
: propertyValue.mProperty;
nsAutoString stringValue;
propertyValue.mValue.AppendToString(
propertyForSerializing, stringValue, nsCSSValue::eNormalized);
JS::Rooted<JS::Value> value(aCx);
if (!ToJSValue(aCx, stringValue, &value) ||
!JS_DefineProperty(aCx, keyframeObject, name, value,
JSPROP_ENUMERATE)) {
aRv.Throw(NS_ERROR_FAILURE);
return;
}
}
aResult.AppendElement(keyframeObject);
}
}
/* static */ const TimeDuration
KeyframeEffectReadOnly::OverflowRegionRefreshInterval()
{
// The amount of time we can wait between updating throttled animations
// on the main thread that influence the overflow region.
static const TimeDuration kOverflowRegionRefreshInterval =
TimeDuration::FromMilliseconds(200);
return kOverflowRegionRefreshInterval;
}
bool
KeyframeEffectReadOnly::CanThrottle() const
{
// Unthrottle if we are not in effect or current. This will be the case when
// our owning animation has finished, is idle, or when we are in the delay
// phase (but without a backwards fill). In each case the computed progress
// value produced on each tick will be the same so we will skip requesting
// unnecessary restyles in NotifyAnimationTimingUpdated. Any calls we *do* get
// here will be because of a change in state (e.g. we are newly finished or
// newly no longer in effect) in which case we shouldn't throttle the sample.
if (!IsInEffect() || !IsCurrent()) {
return false;
}
nsIFrame* frame = GetAnimationFrame();
if (!frame) {
// There are two possible cases here.
// a) No target element
// b) The target element has no frame, e.g. because it is in a display:none
// subtree.
// In either case we can throttle the animation because there is no
// need to update on the main thread.
return true;
}
// We can throttle the animation if the animation is paint only and
// the target frame is out of view or the document is in background tabs.
if (CanIgnoreIfNotVisible()) {
nsIPresShell* presShell = GetPresShell();
if ((presShell && !presShell->IsActive()) ||
frame->IsScrolledOutOfView()) {
return true;
}
}
// First we need to check layer generation and transform overflow
// prior to the property.mIsRunningOnCompositor check because we should
// occasionally unthrottle these animations even if the animations are
// already running on compositor.
for (const LayerAnimationInfo::Record& record :
LayerAnimationInfo::sRecords) {
// Skip properties that are overridden in the cascade.
// (GetAnimationOfProperty, as called by HasAnimationOfProperty,
// only returns an animation if it currently wins in the cascade.)
if (!HasAnimationOfProperty(record.mProperty)) {
continue;
}
EffectSet* effectSet = EffectSet::GetEffectSet(mTarget->mElement,
mTarget->mPseudoType);
MOZ_ASSERT(effectSet, "CanThrottle should be called on an effect "
"associated with a target element");
layers::Layer* layer =
FrameLayerBuilder::GetDedicatedLayer(frame, record.mLayerType);
// Unthrottle if the layer needs to be brought up to date
if (!layer ||
effectSet->GetAnimationGeneration() !=
layer->GetAnimationGeneration()) {
return false;
}
// If this is a transform animation that affects the overflow region,
// we should unthrottle the animation periodically.
if (record.mProperty == eCSSProperty_transform &&
!CanThrottleTransformChanges(*frame)) {
return false;
}
}
for (const AnimationProperty& property : mProperties) {
if (!property.mIsRunningOnCompositor) {
return false;
}
}
return true;
}
bool
KeyframeEffectReadOnly::CanThrottleTransformChanges(nsIFrame& aFrame) const
{
// If we know that the animation cannot cause overflow,
// we can just disable flushes for this animation.
// If we don't show scrollbars, we don't care about overflow.
if (LookAndFeel::GetInt(LookAndFeel::eIntID_ShowHideScrollbars) == 0) {
return true;
}
nsPresContext* presContext = GetPresContext();
// CanThrottleTransformChanges is only called as part of a refresh driver tick
// in which case we expect to has a pres context.
MOZ_ASSERT(presContext);
TimeStamp now =
presContext->RefreshDriver()->MostRecentRefresh();
EffectSet* effectSet = EffectSet::GetEffectSet(mTarget->mElement,
mTarget->mPseudoType);
MOZ_ASSERT(effectSet, "CanThrottleTransformChanges is expected to be called"
" on an effect in an effect set");
MOZ_ASSERT(mAnimation, "CanThrottleTransformChanges is expected to be called"
" on an effect with a parent animation");
TimeStamp animationRuleRefreshTime =
effectSet->AnimationRuleRefreshTime(mAnimation->CascadeLevel());
// If this animation can cause overflow, we can throttle some of the ticks.
if (!animationRuleRefreshTime.IsNull() &&
(now - animationRuleRefreshTime) < OverflowRegionRefreshInterval()) {
return true;
}
// If the nearest scrollable ancestor has overflow:hidden,
// we don't care about overflow.
nsIScrollableFrame* scrollable =
nsLayoutUtils::GetNearestScrollableFrame(&aFrame);
if (!scrollable) {
return true;
}
ScrollbarStyles ss = scrollable->GetScrollbarStyles();
if (ss.mVertical == NS_STYLE_OVERFLOW_HIDDEN &&
ss.mHorizontal == NS_STYLE_OVERFLOW_HIDDEN &&
scrollable->GetLogicalScrollPosition() == nsPoint(0, 0)) {
return true;
}
return false;
}
nsIFrame*
KeyframeEffectReadOnly::GetAnimationFrame() const
{
if (!mTarget) {
return nullptr;
}
nsIFrame* frame = mTarget->mElement->GetPrimaryFrame();
if (!frame) {
return nullptr;
}
if (mTarget->mPseudoType == CSSPseudoElementType::before) {
frame = nsLayoutUtils::GetBeforeFrame(frame);
} else if (mTarget->mPseudoType == CSSPseudoElementType::after) {
frame = nsLayoutUtils::GetAfterFrame(frame);
} else {
MOZ_ASSERT(mTarget->mPseudoType == CSSPseudoElementType::NotPseudo,
"unknown mTarget->mPseudoType");
}
if (!frame) {
return nullptr;
}
return nsLayoutUtils::GetStyleFrame(frame);
}
nsIDocument*
KeyframeEffectReadOnly::GetRenderedDocument() const
{
if (!mTarget) {
return nullptr;
}
return mTarget->mElement->GetComposedDoc();
}
nsIPresShell*
KeyframeEffectReadOnly::GetPresShell() const
{
nsIDocument* doc = GetRenderedDocument();
if (!doc) {
return nullptr;
}
return doc->GetShell();
}
nsPresContext*
KeyframeEffectReadOnly::GetPresContext() const
{
nsIPresShell* shell = GetPresShell();
if (!shell) {
return nullptr;
}
return shell->GetPresContext();
}
/* static */ bool
KeyframeEffectReadOnly::IsGeometricProperty(
const nsCSSProperty aProperty)
{
switch (aProperty) {
case eCSSProperty_bottom:
case eCSSProperty_height:
case eCSSProperty_left:
case eCSSProperty_right:
case eCSSProperty_top:
case eCSSProperty_width:
return true;
default:
return false;
}
}
/* static */ bool
KeyframeEffectReadOnly::CanAnimateTransformOnCompositor(
const nsIFrame* aFrame,
AnimationPerformanceWarning::Type& aPerformanceWarning)
{
// Disallow OMTA for preserve-3d transform. Note that we check the style property
// rather than Extend3DContext() since that can recurse back into this function
// via HasOpacity(). See bug 779598.
if (aFrame->Combines3DTransformWithAncestors() ||
aFrame->StyleDisplay()->mTransformStyle == NS_STYLE_TRANSFORM_STYLE_PRESERVE_3D) {
aPerformanceWarning = AnimationPerformanceWarning::Type::TransformPreserve3D;
return false;
}
// Note that testing BackfaceIsHidden() is not a sufficient test for
// what we need for animating backface-visibility correctly if we
// remove the above test for Extend3DContext(); that would require
// looking at backface-visibility on descendants as well. See bug 1186204.
if (aFrame->StyleDisplay()->BackfaceIsHidden()) {
aPerformanceWarning =
AnimationPerformanceWarning::Type::TransformBackfaceVisibilityHidden;
return false;
}
// Async 'transform' animations of aFrames with SVG transforms is not
// supported. See bug 779599.
if (aFrame->IsSVGTransformed()) {
aPerformanceWarning = AnimationPerformanceWarning::Type::TransformSVG;
return false;
}
return true;
}
bool
KeyframeEffectReadOnly::ShouldBlockAsyncTransformAnimations(
const nsIFrame* aFrame,
AnimationPerformanceWarning::Type& aPerformanceWarning) const
{
// We currently only expect this method to be called when this effect
// is attached to a playing Animation. If that ever changes we'll need
// to update this to only return true when that is the case since paused,
// filling, cancelled Animations etc. shouldn't stop other Animations from
// running on the compositor.
MOZ_ASSERT(mAnimation && mAnimation->IsPlaying());
for (const AnimationProperty& property : mProperties) {
// If a property is overridden in the CSS cascade, it should not block other
// animations from running on the compositor.
if (!property.mWinsInCascade) {
continue;
}
// Check for geometric properties
if (IsGeometricProperty(property.mProperty)) {
aPerformanceWarning =
AnimationPerformanceWarning::Type::TransformWithGeometricProperties;
return true;
}
// Check for unsupported transform animations
if (property.mProperty == eCSSProperty_transform) {
if (!CanAnimateTransformOnCompositor(aFrame,
aPerformanceWarning)) {
return true;
}
}
}
return false;
}
void
KeyframeEffectReadOnly::SetPerformanceWarning(
nsCSSProperty aProperty,
const AnimationPerformanceWarning& aWarning)
{
for (AnimationProperty& property : mProperties) {
if (property.mProperty == aProperty &&
(!property.mPerformanceWarning ||
*property.mPerformanceWarning != aWarning)) {
property.mPerformanceWarning = Some(aWarning);
nsXPIDLString localizedString;
if (nsLayoutUtils::IsAnimationLoggingEnabled() &&
property.mPerformanceWarning->ToLocalizedString(localizedString)) {
nsAutoCString logMessage = NS_ConvertUTF16toUTF8(localizedString);
AnimationUtils::LogAsyncAnimationFailure(logMessage, mTarget->mElement);
}
return;
}
}
}
void
KeyframeEffectReadOnly::CalculateCumulativeChangeHint()
{
mCumulativeChangeHint = nsChangeHint(0);
for (const AnimationProperty& property : mProperties) {
for (const AnimationPropertySegment& segment : property.mSegments) {
mCumulativeChangeHint |= segment.mChangeHint;
}
}
}
bool
KeyframeEffectReadOnly::CanIgnoreIfNotVisible() const
{
if (!AnimationUtils::IsOffscreenThrottlingEnabled()) {
return false;
}
// FIXME: For further sophisticated optimization we need to check
// change hint on the segment corresponding to computedTiming.progress.
return NS_IsHintSubset(
mCumulativeChangeHint, nsChangeHint_Hints_CanIgnoreIfNotVisible);
}
//---------------------------------------------------------------------
//
// KeyframeEffect
//
//---------------------------------------------------------------------
KeyframeEffect::KeyframeEffect(nsIDocument* aDocument,
const Maybe<OwningAnimationTarget>& aTarget,
const TimingParams& aTiming)
: KeyframeEffectReadOnly(aDocument, aTarget,
new AnimationEffectTiming(aDocument, aTiming, this))
{
}
JSObject*
KeyframeEffect::WrapObject(JSContext* aCx,
JS::Handle<JSObject*> aGivenProto)
{
return KeyframeEffectBinding::Wrap(aCx, this, aGivenProto);
}
/* static */ already_AddRefed<KeyframeEffect>
KeyframeEffect::Constructor(
const GlobalObject& aGlobal,
const Nullable<ElementOrCSSPseudoElement>& aTarget,
JS::Handle<JSObject*> aKeyframes,
const UnrestrictedDoubleOrKeyframeEffectOptions& aOptions,
ErrorResult& aRv)
{
return ConstructKeyframeEffect<KeyframeEffect>(aGlobal, aTarget, aKeyframes,
aOptions, aRv);
}
/* static */ already_AddRefed<KeyframeEffect>
KeyframeEffect::Constructor(
const GlobalObject& aGlobal,
const Nullable<ElementOrCSSPseudoElement>& aTarget,
JS::Handle<JSObject*> aKeyframes,
const UnrestrictedDoubleOrKeyframeAnimationOptions& aOptions,
ErrorResult& aRv)
{
return ConstructKeyframeEffect<KeyframeEffect>(aGlobal, aTarget, aKeyframes,
aOptions, aRv);
}
void
KeyframeEffect::NotifySpecifiedTimingUpdated()
{
// Use the same document for a pseudo element and its parent element.
// Use nullptr if we don't have mTarget, so disable the mutation batch.
nsAutoAnimationMutationBatch mb(mTarget ? mTarget->mElement->OwnerDoc()
: nullptr);
if (mAnimation) {
mAnimation->NotifyEffectTimingUpdated();
if (mAnimation->IsRelevant()) {
nsNodeUtils::AnimationChanged(mAnimation);
}
RequestRestyle(EffectCompositor::RestyleType::Layer);
}
}
void
KeyframeEffect::SetTarget(const Nullable<ElementOrCSSPseudoElement>& aTarget)
{
Maybe<OwningAnimationTarget> newTarget = ConvertTarget(aTarget);
if (mTarget == newTarget) {
// Assign the same target, skip it.
return;
}
if (mTarget) {
UnregisterTarget();
ResetIsRunningOnCompositor();
ResetWinsInCascade();
RequestRestyle(EffectCompositor::RestyleType::Layer);
nsAutoAnimationMutationBatch mb(mTarget->mElement->OwnerDoc());
if (mAnimation) {
nsNodeUtils::AnimationRemoved(mAnimation);
}
}
mTarget = newTarget;
if (mTarget) {
UpdateTargetRegistration();
MaybeUpdateProperties();
RequestRestyle(EffectCompositor::RestyleType::Layer);
nsAutoAnimationMutationBatch mb(mTarget->mElement->OwnerDoc());
if (mAnimation) {
nsNodeUtils::AnimationAdded(mAnimation);
}
}
}
KeyframeEffect::~KeyframeEffect()
{
// mTiming is cycle collected, so we have to do null check first even though
// mTiming shouldn't be null during the lifetime of KeyframeEffect.
if (mTiming) {
mTiming->Unlink();
}
}
void
KeyframeEffect::MaybeUpdateProperties()
{
if (!mTarget) {
return;
}
nsIDocument* doc = mTarget->mElement->OwnerDoc();
if (!doc) {
return;
}
nsIAtom* pseudo = mTarget->mPseudoType < CSSPseudoElementType::Count ?
nsCSSPseudoElements::GetPseudoAtom(mTarget->mPseudoType) :
nullptr;
RefPtr<nsStyleContext> styleContext =
nsComputedDOMStyle::GetStyleContextForElement(mTarget->mElement, pseudo,
doc->GetShell());
if (!styleContext) {
return;
}
UpdateProperties(styleContext);
}
} // namespace dom
} // namespace mozilla
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