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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 "FrameLayerBuilder.h"
#include "mozilla/dom/Animation.h"
#include "mozilla/dom/KeyframeAnimationOptionsBinding.h"
// For UnrestrictedDoubleOrKeyframeAnimationOptions;
#include "mozilla/dom/CSSPseudoElement.h"
#include "mozilla/dom/KeyframeEffectBinding.h"
#include "mozilla/dom/MutationObservers.h"
#include "mozilla/AnimationUtils.h"
#include "mozilla/AutoRestore.h"
#include "mozilla/ComputedStyleInlines.h"
#include "mozilla/EffectSet.h"
#include "mozilla/FloatingPoint.h" // For IsFinite
#include "mozilla/LayerAnimationInfo.h"
#include "mozilla/LookAndFeel.h" // For LookAndFeel::GetInt
#include "mozilla/KeyframeUtils.h"
#include "mozilla/PresShell.h"
#include "mozilla/PresShellInlines.h"
#include "mozilla/ServoBindings.h"
#include "mozilla/StaticPrefs_dom.h"
#include "mozilla/StaticPrefs_gfx.h"
#include "mozilla/StaticPrefs_layers.h"
#include "mozilla/TypeTraits.h"
#include "Layers.h" // For Layer
#include "nsComputedDOMStyle.h" // nsComputedDOMStyle::GetComputedStyle
#include "nsContentUtils.h"
#include "nsCSSPropertyIDSet.h"
#include "nsCSSProps.h" // For nsCSSProps::PropHasFlags
#include "nsCSSPseudoElements.h" // For PseudoStyleType
#include "nsDOMMutationObserver.h" // For nsAutoAnimationMutationBatch
#include "nsIFrame.h"
#include "nsPresContextInlines.h"
#include "nsRefreshDriver.h"
namespace mozilla {
void AnimationProperty::SetPerformanceWarning(
const AnimationPerformanceWarning& aWarning, const Element* aElement) {
if (mPerformanceWarning && *mPerformanceWarning == aWarning) {
return;
}
mPerformanceWarning = Some(aWarning);
nsAutoString localizedString;
if (StaticPrefs::layers_offmainthreadcomposition_log_animations() &&
mPerformanceWarning->ToLocalizedString(localizedString)) {
nsAutoCString logMessage = NS_ConvertUTF16toUTF8(localizedString);
AnimationUtils::LogAsyncAnimationFailure(logMessage, aElement);
}
}
bool PropertyValuePair::operator==(const PropertyValuePair& aOther) const {
if (mProperty != aOther.mProperty) {
return false;
}
if (mServoDeclarationBlock == aOther.mServoDeclarationBlock) {
return true;
}
if (!mServoDeclarationBlock || !aOther.mServoDeclarationBlock) {
return false;
}
return Servo_DeclarationBlock_Equals(mServoDeclarationBlock,
aOther.mServoDeclarationBlock);
}
namespace dom {
NS_IMPL_CYCLE_COLLECTION_INHERITED(KeyframeEffect, AnimationEffect, mTarget)
NS_IMPL_CYCLE_COLLECTION_TRACE_BEGIN_INHERITED(KeyframeEffect, AnimationEffect)
NS_IMPL_CYCLE_COLLECTION_TRACE_END
NS_INTERFACE_MAP_BEGIN_CYCLE_COLLECTION(KeyframeEffect)
NS_INTERFACE_MAP_END_INHERITING(AnimationEffect)
NS_IMPL_ADDREF_INHERITED(KeyframeEffect, AnimationEffect)
NS_IMPL_RELEASE_INHERITED(KeyframeEffect, AnimationEffect)
KeyframeEffect::KeyframeEffect(Document* aDocument,
const Maybe<OwningAnimationTarget>& aTarget,
TimingParams&& aTiming,
const KeyframeEffectParams& aOptions)
: AnimationEffect(aDocument, std::move(aTiming)),
mTarget(aTarget),
mEffectOptions(aOptions),
mCumulativeChangeHint(nsChangeHint(0)) {}
JSObject* KeyframeEffect::WrapObject(JSContext* aCx,
JS::Handle<JSObject*> aGivenProto) {
return KeyframeEffect_Binding::Wrap(aCx, this, aGivenProto);
}
IterationCompositeOperation KeyframeEffect::IterationComposite() const {
return mEffectOptions.mIterationComposite;
}
void KeyframeEffect::SetIterationComposite(
const IterationCompositeOperation& aIterationComposite) {
if (mEffectOptions.mIterationComposite == aIterationComposite) {
return;
}
if (mAnimation && mAnimation->IsRelevant()) {
MutationObservers::NotifyAnimationChanged(mAnimation);
}
mEffectOptions.mIterationComposite = aIterationComposite;
RequestRestyle(EffectCompositor::RestyleType::Layer);
}
CompositeOperation KeyframeEffect::Composite() const {
return mEffectOptions.mComposite;
}
void KeyframeEffect::SetComposite(const CompositeOperation& aComposite) {
if (mEffectOptions.mComposite == aComposite) {
return;
}
mEffectOptions.mComposite = aComposite;
if (mAnimation && mAnimation->IsRelevant()) {
MutationObservers::NotifyAnimationChanged(mAnimation);
}
if (mTarget) {
RefPtr<ComputedStyle> computedStyle = GetTargetComputedStyle(Flush::None);
if (computedStyle) {
UpdateProperties(computedStyle);
}
}
}
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()) {
MutationObservers::NotifyAnimationChanged(mAnimation);
}
RequestRestyle(EffectCompositor::RestyleType::Layer);
}
}
void KeyframeEffect::NotifyAnimationTimingUpdated(
PostRestyleMode aPostRestyle) {
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();
}
// Request restyle if necessary.
if (aPostRestyle == PostRestyleMode::IfNeeded && mAnimation &&
!mProperties.IsEmpty() && HasComputedTimingChanged()) {
EffectCompositor::RestyleType restyleType =
CanThrottle() ? EffectCompositor::RestyleType::Throttled
: EffectCompositor::RestyleType::Standard;
RequestRestyle(restyleType);
}
// Detect changes to "in effect" status since we need to recalculate the
// animation cascade for this element whenever that changes.
// Note that updating mInEffectOnLastAnimationTimingUpdate has to be done
// after above CanThrottle() call since the function uses the flag inside it.
bool inEffect = IsInEffect();
if (inEffect != mInEffectOnLastAnimationTimingUpdate) {
MarkCascadeNeedsUpdate();
mInEffectOnLastAnimationTimingUpdate = inEffect;
}
// If we're no longer "in effect", our ComposeStyle method will never be
// called and we will never have a chance to update mProgressOnLastCompose
// and mCurrentIterationOnLastCompose.
// We clear them here to ensure that if we later become "in effect" we will
// request a restyle (above).
if (!inEffect) {
mProgressOnLastCompose.SetNull();
mCurrentIterationOnLastCompose = 0;
}
}
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://drafts.csswg.org/web-animations/#dom-keyframeeffect-setkeyframes
void KeyframeEffect::SetKeyframes(JSContext* aContext,
JS::Handle<JSObject*> aKeyframes,
ErrorResult& aRv) {
nsTArray<Keyframe> keyframes = KeyframeUtils::GetKeyframesFromObject(
aContext, mDocument, aKeyframes, aRv);
if (aRv.Failed()) {
return;
}
RefPtr<ComputedStyle> style = GetTargetComputedStyle(Flush::None);
SetKeyframes(std::move(keyframes), style);
}
void KeyframeEffect::SetKeyframes(nsTArray<Keyframe>&& aKeyframes,
const ComputedStyle* aStyle) {
if (KeyframesEqualIgnoringComputedOffsets(aKeyframes, mKeyframes)) {
return;
}
mKeyframes = std::move(aKeyframes);
KeyframeUtils::DistributeKeyframes(mKeyframes);
if (mAnimation && mAnimation->IsRelevant()) {
MutationObservers::NotifyAnimationChanged(mAnimation);
}
// We need to call UpdateProperties() unless the target element doesn't have
// style (e.g. the target element is not associated with any document).
if (aStyle) {
UpdateProperties(aStyle);
}
}
static bool IsEffectiveProperty(const EffectSet& aEffects,
nsCSSPropertyID aProperty) {
return !aEffects.PropertiesWithImportantRules().HasProperty(aProperty) ||
!aEffects.PropertiesForAnimationsLevel().HasProperty(aProperty);
}
const AnimationProperty* KeyframeEffect::GetEffectiveAnimationOfProperty(
nsCSSPropertyID aProperty, const EffectSet& aEffects) const {
MOZ_ASSERT(&aEffects ==
EffectSet::GetEffectSet(mTarget->mElement, mTarget->mPseudoType));
for (const AnimationProperty& property : mProperties) {
if (aProperty != property.mProperty) {
continue;
}
const AnimationProperty* result = nullptr;
// Only include the property if it is not overridden by !important rules in
// the transitions level.
if (IsEffectiveProperty(aEffects, property.mProperty)) {
result = &property;
}
return result;
}
return nullptr;
}
bool KeyframeEffect::HasEffectiveAnimationOfPropertySet(
const nsCSSPropertyIDSet& aPropertySet, const EffectSet& aEffectSet) const {
for (const AnimationProperty& property : mProperties) {
if (aPropertySet.HasProperty(property.mProperty) &&
IsEffectiveProperty(aEffectSet, property.mProperty)) {
return true;
}
}
return false;
}
nsCSSPropertyIDSet KeyframeEffect::GetPropertiesForCompositor(
EffectSet& aEffects, const nsIFrame* aFrame) const {
MOZ_ASSERT(&aEffects ==
EffectSet::GetEffectSet(mTarget->mElement, mTarget->mPseudoType));
nsCSSPropertyIDSet properties;
if (!mAnimation || !mAnimation->IsRelevant()) {
return properties;
}
static constexpr nsCSSPropertyIDSet compositorAnimatables =
nsCSSPropertyIDSet::CompositorAnimatables();
static constexpr nsCSSPropertyIDSet transformLikeProperties =
nsCSSPropertyIDSet::TransformLikeProperties();
nsCSSPropertyIDSet transformSet;
AnimationPerformanceWarning::Type dummyWarning;
for (const AnimationProperty& property : mProperties) {
if (!compositorAnimatables.HasProperty(property.mProperty)) {
continue;
}
// Transform-like properties are combined together on the compositor so we
// need to evaluate them as a group. We build up a separate set here then
// evaluate it as a separate step below.
if (transformLikeProperties.HasProperty(property.mProperty)) {
transformSet.AddProperty(property.mProperty);
continue;
}
KeyframeEffect::MatchForCompositor matchResult = IsMatchForCompositor(
nsCSSPropertyIDSet{property.mProperty}, aFrame, aEffects, dummyWarning);
if (matchResult ==
KeyframeEffect::MatchForCompositor::NoAndBlockThisProperty ||
matchResult == KeyframeEffect::MatchForCompositor::No) {
continue;
}
properties.AddProperty(property.mProperty);
}
if (!transformSet.IsEmpty()) {
KeyframeEffect::MatchForCompositor matchResult =
IsMatchForCompositor(transformSet, aFrame, aEffects, dummyWarning);
if (matchResult == KeyframeEffect::MatchForCompositor::Yes ||
matchResult == KeyframeEffect::MatchForCompositor::IfNeeded) {
properties |= transformSet;
}
}
return properties;
}
nsCSSPropertyIDSet KeyframeEffect::GetPropertySet() const {
nsCSSPropertyIDSet result;
for (const AnimationProperty& property : mProperties) {
result.AddProperty(property.mProperty);
}
return result;
}
#ifdef DEBUG
bool SpecifiedKeyframeArraysAreEqual(const nsTArray<Keyframe>& aA,
const nsTArray<Keyframe>& aB) {
if (aA.Length() != aB.Length()) {
return false;
}
for (size_t i = 0; i < aA.Length(); i++) {
const Keyframe& a = aA[i];
const Keyframe& b = aB[i];
if (a.mOffset != b.mOffset || a.mTimingFunction != b.mTimingFunction ||
a.mPropertyValues != b.mPropertyValues) {
return false;
}
}
return true;
}
#endif
void KeyframeEffect::UpdateProperties(const ComputedStyle* aStyle) {
MOZ_ASSERT(aStyle);
nsTArray<AnimationProperty> properties = BuildProperties(aStyle);
bool propertiesChanged = mProperties != properties;
// We need to update base styles even if any properties are not changed at all
// since base styles might have been changed due to parent style changes, etc.
bool baseStylesChanged = false;
EnsureBaseStyles(aStyle, properties,
!propertiesChanged ? &baseStylesChanged : nullptr);
if (!propertiesChanged) {
if (baseStylesChanged) {
RequestRestyle(EffectCompositor::RestyleType::Layer);
}
// Check if we need to update the cumulative change hint because we now have
// style data.
if (mNeedsStyleData && mTarget && mTarget->mElement->HasServoData()) {
CalculateCumulativeChangeHint(aStyle);
}
return;
}
// Preserve the state of the mIsRunningOnCompositor flag.
nsCSSPropertyIDSet runningOnCompositorProperties;
for (const AnimationProperty& property : mProperties) {
if (property.mIsRunningOnCompositor) {
runningOnCompositorProperties.AddProperty(property.mProperty);
}
}
mProperties = std::move(properties);
UpdateEffectSet();
for (AnimationProperty& property : mProperties) {
property.mIsRunningOnCompositor =
runningOnCompositorProperties.HasProperty(property.mProperty);
}
CalculateCumulativeChangeHint(aStyle);
MarkCascadeNeedsUpdate();
if (mAnimation) {
mAnimation->NotifyEffectPropertiesUpdated();
}
RequestRestyle(EffectCompositor::RestyleType::Layer);
}
void KeyframeEffect::EnsureBaseStyles(
const ComputedStyle* aComputedValues,
const nsTArray<AnimationProperty>& aProperties, bool* aBaseStylesChanged) {
if (aBaseStylesChanged != nullptr) {
*aBaseStylesChanged = false;
}
if (!mTarget) {
return;
}
BaseValuesHashmap previousBaseStyles;
if (aBaseStylesChanged != nullptr) {
previousBaseStyles = std::move(mBaseValues);
}
mBaseValues.Clear();
nsPresContext* presContext =
nsContentUtils::GetContextForContent(mTarget->mElement);
// If |aProperties| is empty we're not going to dereference |presContext| so
// we don't care if it is nullptr.
//
// We could just return early when |aProperties| is empty and save looking up
// the pres context, but that won't save any effort normally since we don't
// call this function if we have no keyframes to begin with. Furthermore, the
// case where |presContext| is nullptr is so rare (we've only ever seen in
// fuzzing, and even then we've never been able to reproduce it reliably)
// it's not worth the runtime cost of an extra branch.
MOZ_ASSERT(presContext || aProperties.IsEmpty(),
"Typically presContext should not be nullptr but if it is"
" we should have also failed to calculate the computed values"
" passed-in as aProperties");
RefPtr<ComputedStyle> baseComputedStyle;
for (const AnimationProperty& property : aProperties) {
EnsureBaseStyle(property, presContext, aComputedValues, baseComputedStyle);
}
if (aBaseStylesChanged != nullptr) {
for (auto iter = mBaseValues.Iter(); !iter.Done(); iter.Next()) {
if (AnimationValue(iter.Data()) !=
AnimationValue(previousBaseStyles.Get(iter.Key()))) {
*aBaseStylesChanged = true;
break;
}
}
}
}
void KeyframeEffect::EnsureBaseStyle(
const AnimationProperty& aProperty, nsPresContext* aPresContext,
const ComputedStyle* aComputedStyle,
RefPtr<ComputedStyle>& aBaseComputedStyle) {
bool hasAdditiveValues = false;
for (const AnimationPropertySegment& segment : aProperty.mSegments) {
if (!segment.HasReplaceableValues()) {
hasAdditiveValues = true;
break;
}
}
if (!hasAdditiveValues) {
return;
}
if (!aBaseComputedStyle) {
Element* animatingElement = EffectCompositor::GetElementToRestyle(
mTarget->mElement, mTarget->mPseudoType);
if (!animatingElement) {
return;
}
aBaseComputedStyle = aPresContext->StyleSet()->GetBaseContextForElement(
animatingElement, aComputedStyle);
}
RefPtr<RawServoAnimationValue> baseValue =
Servo_ComputedValues_ExtractAnimationValue(aBaseComputedStyle,
aProperty.mProperty)
.Consume();
mBaseValues.Put(aProperty.mProperty, baseValue);
}
void KeyframeEffect::WillComposeStyle() {
ComputedTiming computedTiming = GetComputedTiming();
mProgressOnLastCompose = computedTiming.mProgress;
mCurrentIterationOnLastCompose = computedTiming.mCurrentIteration;
}
void KeyframeEffect::ComposeStyleRule(
RawServoAnimationValueMap& aAnimationValues,
const AnimationProperty& aProperty,
const AnimationPropertySegment& aSegment,
const ComputedTiming& aComputedTiming) {
auto* opaqueTable =
reinterpret_cast<RawServoAnimationValueTable*>(&mBaseValues);
Servo_AnimationCompose(&aAnimationValues, opaqueTable, aProperty.mProperty,
&aSegment, &aProperty.mSegments.LastElement(),
&aComputedTiming, mEffectOptions.mIterationComposite);
}
void KeyframeEffect::ComposeStyle(RawServoAnimationValueMap& aComposeResult,
const nsCSSPropertyIDSet& aPropertiesToSkip) {
ComputedTiming computedTiming = GetComputedTiming();
// 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 (aPropertiesToSkip.HasProperty(prop.mProperty)) {
continue;
}
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");
ComposeStyleRule(aComposeResult, prop, *segment, computedTiming);
}
// If the animation produces a change hint that affects the overflow region,
// we need to record the current time to unthrottle the animation
// periodically when the animation is being throttled because it's scrolled
// out of view.
if (HasPropertiesThatMightAffectOverflow()) {
nsPresContext* presContext =
nsContentUtils::GetContextForContent(mTarget->mElement);
EffectSet* effectSet =
EffectSet::GetEffectSet(mTarget->mElement, mTarget->mPseudoType);
if (presContext && effectSet) {
TimeStamp now = presContext->RefreshDriver()->MostRecentRefresh();
effectSet->UpdateLastOverflowAnimationSyncTime(now);
}
}
}
bool KeyframeEffect::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 KeyframeEffect::SetIsRunningOnCompositor(nsCSSPropertyID aProperty,
bool aIsRunning) {
MOZ_ASSERT(
nsCSSProps::PropHasFlags(aProperty, CSSPropFlags::CanAnimateOnCompositor),
"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 KeyframeEffect::SetIsRunningOnCompositor(
const nsCSSPropertyIDSet& aPropertySet, bool aIsRunning) {
for (AnimationProperty& property : mProperties) {
if (aPropertySet.HasProperty(property.mProperty)) {
MOZ_ASSERT(nsCSSProps::PropHasFlags(property.mProperty,
CSSPropFlags::CanAnimateOnCompositor),
"Property being animated on compositor is a recognized "
"compositor-animatable property");
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();
}
}
}
}
void KeyframeEffect::ResetIsRunningOnCompositor() {
for (AnimationProperty& property : mProperties) {
property.mIsRunningOnCompositor = false;
}
}
static const KeyframeEffectOptions& KeyframeEffectOptionsFromUnion(
const UnrestrictedDoubleOrKeyframeEffectOptions& aOptions) {
MOZ_ASSERT(aOptions.IsKeyframeEffectOptions());
return aOptions.GetAsKeyframeEffectOptions();
}
static const KeyframeEffectOptions& KeyframeEffectOptionsFromUnion(
const UnrestrictedDoubleOrKeyframeAnimationOptions& aOptions) {
MOZ_ASSERT(aOptions.IsKeyframeAnimationOptions());
return aOptions.GetAsKeyframeAnimationOptions();
}
template <class OptionsType>
static KeyframeEffectParams KeyframeEffectParamsFromUnion(
const OptionsType& aOptions, CallerType aCallerType) {
KeyframeEffectParams result;
if (aOptions.IsUnrestrictedDouble() ||
// Ignore iterationComposite and composite if the corresponding pref is
// not set. The default value 'Replace' will be used instead.
!StaticPrefs::dom_animations_api_compositing_enabled()) {
return result;
}
const KeyframeEffectOptions& options =
KeyframeEffectOptionsFromUnion(aOptions);
result.mIterationComposite = options.mIterationComposite;
result.mComposite = options.mComposite;
return result;
}
/* static */
Maybe<OwningAnimationTarget> KeyframeEffect::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().Element();
result.emplace(elem, target.GetAsCSSPseudoElement().GetType());
}
return result;
}
template <class OptionsType>
/* static */
already_AddRefed<KeyframeEffect> KeyframeEffect::ConstructKeyframeEffect(
const GlobalObject& aGlobal,
const Nullable<ElementOrCSSPseudoElement>& aTarget,
JS::Handle<JSObject*> aKeyframes, const OptionsType& aOptions,
ErrorResult& aRv) {
// We should get the document from `aGlobal` instead of the current Realm
// to make this works in Xray case.
//
// In all non-Xray cases, `aGlobal` matches the current Realm, so this
// matches the spec behavior.
//
// In Xray case, the new objects should be created using the document of
// the target global, but the KeyframeEffect constructors are called in the
// caller's compartment to access `aKeyframes` object.
Document* doc = AnimationUtils::GetDocumentFromGlobal(aGlobal.Get());
if (!doc) {
aRv.Throw(NS_ERROR_FAILURE);
return nullptr;
}
TimingParams timingParams =
TimingParams::FromOptionsUnion(aOptions, doc, aRv);
if (aRv.Failed()) {
return nullptr;
}
KeyframeEffectParams effectOptions =
KeyframeEffectParamsFromUnion(aOptions, aGlobal.CallerType());
Maybe<OwningAnimationTarget> target = ConvertTarget(aTarget);
RefPtr<KeyframeEffect> effect =
new KeyframeEffect(doc, target, std::move(timingParams), effectOptions);
effect->SetKeyframes(aGlobal.Context(), aKeyframes, aRv);
if (aRv.Failed()) {
return nullptr;
}
return effect.forget();
}
nsTArray<AnimationProperty> KeyframeEffect::BuildProperties(
const ComputedStyle* aStyle) {
MOZ_ASSERT(aStyle);
nsTArray<AnimationProperty> result;
// If mTarget is null, return an empty property array.
if (!mTarget) {
return result;
}
// When GetComputedKeyframeValues or GetAnimationPropertiesFromKeyframes
// calculate computed values from |mKeyframes|, they could possibly
// trigger a subsequent restyle in which we rebuild animations. If that
// happens we could find that |mKeyframes| is overwritten while it is
// being iterated over. Normally that shouldn't happen but just in case we
// make a copy of |mKeyframes| first and iterate over that instead.
auto keyframesCopy(mKeyframes);
result = KeyframeUtils::GetAnimationPropertiesFromKeyframes(
keyframesCopy, mTarget->mElement, aStyle, mEffectOptions.mComposite);
#ifdef DEBUG
MOZ_ASSERT(SpecifiedKeyframeArraysAreEqual(mKeyframes, keyframesCopy),
"Apart from the computed offset members, the keyframes array"
" should not be modified");
#endif
mKeyframes.SwapElements(keyframesCopy);
return result;
}
template <typename FrameEnumFunc>
static void EnumerateContinuationsOrIBSplitSiblings(nsIFrame* aFrame,
FrameEnumFunc&& aFunc) {
while (aFrame) {
aFunc(aFrame);
aFrame = nsLayoutUtils::GetNextContinuationOrIBSplitSibling(aFrame);
}
}
void KeyframeEffect::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()) && mAnimation &&
mAnimation->ReplaceState() != AnimationReplaceState::Removed),
"Out of date Animation::IsRelevant value");
if (isRelevant && !mInEffectSet) {
EffectSet* effectSet = EffectSet::GetOrCreateEffectSet(
mTarget->mElement, mTarget->mPseudoType);
effectSet->AddEffect(*this);
mInEffectSet = true;
UpdateEffectSet(effectSet);
nsIFrame* frame = GetPrimaryFrame();
EnumerateContinuationsOrIBSplitSiblings(
frame, [](nsIFrame* aFrame) { aFrame->MarkNeedsDisplayItemRebuild(); });
} else if (!isRelevant && mInEffectSet) {
UnregisterTarget();
}
}
void KeyframeEffect::UnregisterTarget() {
if (!mInEffectSet) {
return;
}
EffectSet* effectSet =
EffectSet::GetEffectSet(mTarget->mElement, mTarget->mPseudoType);
MOZ_ASSERT(effectSet,
"If mInEffectSet is true, there must be an EffectSet"
" on the target element");
mInEffectSet = false;
if (effectSet) {
effectSet->RemoveEffect(*this);
if (effectSet->IsEmpty()) {
EffectSet::DestroyEffectSet(mTarget->mElement, mTarget->mPseudoType);
}
}
nsIFrame* frame = GetPrimaryFrame();
EnumerateContinuationsOrIBSplitSiblings(
frame, [](nsIFrame* aFrame) { aFrame->MarkNeedsDisplayItemRebuild(); });
}
void KeyframeEffect::RequestRestyle(
EffectCompositor::RestyleType aRestyleType) {
if (!mTarget) {
return;
}
nsPresContext* presContext =
nsContentUtils::GetContextForContent(mTarget->mElement);
if (presContext && mAnimation) {
presContext->EffectCompositor()->RequestRestyle(
mTarget->mElement, mTarget->mPseudoType, aRestyleType,
mAnimation->CascadeLevel());
}
}
already_AddRefed<ComputedStyle> KeyframeEffect::GetTargetComputedStyle(
Flush aFlushType) const {
if (!GetRenderedDocument()) {
return nullptr;
}
MOZ_ASSERT(mTarget,
"Should only have a document when we have a target element");
nsAtom* pseudo =
PseudoStyle::IsPseudoElement(mTarget->mPseudoType)
? nsCSSPseudoElements::GetPseudoAtom(mTarget->mPseudoType)
: nullptr;
OwningAnimationTarget kungfuDeathGrip(mTarget->mElement,
mTarget->mPseudoType);
return aFlushType == Flush::Style
? nsComputedDOMStyle::GetComputedStyle(mTarget->mElement, pseudo)
: nsComputedDOMStyle::GetComputedStyleNoFlush(mTarget->mElement,
pseudo);
}
#ifdef DEBUG
void DumpAnimationProperties(
nsTArray<AnimationProperty>& aAnimationProperties) {
for (auto& p : aAnimationProperties) {
printf("%s\n", nsCString(nsCSSProps::GetStringValue(p.mProperty)).get());
for (auto& s : p.mSegments) {
nsString fromValue, toValue;
s.mFromValue.SerializeSpecifiedValue(p.mProperty, fromValue);
s.mToValue.SerializeSpecifiedValue(p.mProperty, toValue);
printf(" %f..%f: %s..%s\n", s.mFromKey, s.mToKey,
NS_ConvertUTF16toUTF8(fromValue).get(),
NS_ConvertUTF16toUTF8(toValue).get());
}
}
}
#endif
/* static */
already_AddRefed<KeyframeEffect> KeyframeEffect::Constructor(
const GlobalObject& aGlobal,
const Nullable<ElementOrCSSPseudoElement>& aTarget,
JS::Handle<JSObject*> aKeyframes,
const UnrestrictedDoubleOrKeyframeEffectOptions& aOptions,
ErrorResult& aRv) {
return ConstructKeyframeEffect(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(aGlobal, aTarget, aKeyframes, aOptions, aRv);
}
/* static */
already_AddRefed<KeyframeEffect> KeyframeEffect::Constructor(
const GlobalObject& aGlobal, KeyframeEffect& aSource, ErrorResult& aRv) {
Document* doc = AnimationUtils::GetCurrentRealmDocument(aGlobal.Context());
if (!doc) {
aRv.Throw(NS_ERROR_FAILURE);
return nullptr;
}
// Create a new KeyframeEffect object with aSource's target,
// iteration composite operation, composite operation, and spacing mode.
// The constructor creates a new AnimationEffect object by
// aSource's TimingParams.
// Note: we don't need to re-throw exceptions since the value specified on
// aSource's timing object can be assumed valid.
RefPtr<KeyframeEffect> effect = new KeyframeEffect(
doc, aSource.mTarget, TimingParams(aSource.SpecifiedTiming()),
aSource.mEffectOptions);
// Copy cumulative change hint. mCumulativeChangeHint should be the same as
// the source one because both of targets are the same.
effect->mCumulativeChangeHint = aSource.mCumulativeChangeHint;
// Copy aSource's keyframes and animation properties.
// Note: We don't call SetKeyframes directly, which might revise the
// computed offsets and rebuild the animation properties.
effect->mKeyframes = aSource.mKeyframes;
effect->mProperties = aSource.mProperties;
for (auto iter = aSource.mBaseValues.ConstIter(); !iter.Done(); iter.Next()) {
effect->mBaseValues.Put(iter.Key(), iter.Data());
}
return effect.forget();
}
void KeyframeEffect::GetTarget(
Nullable<OwningElementOrCSSPseudoElement>& aRv) const {
if (!mTarget) {
aRv.SetNull();
return;
}
switch (mTarget->mPseudoType) {
case PseudoStyleType::before:
case PseudoStyleType::after:
case PseudoStyleType::marker:
aRv.SetValue().SetAsCSSPseudoElement() =
CSSPseudoElement::GetCSSPseudoElement(mTarget->mElement,
mTarget->mPseudoType);
break;
case PseudoStyleType::NotPseudo:
aRv.SetValue().SetAsElement() = mTarget->mElement;
break;
default:
MOZ_ASSERT_UNREACHABLE("Animation of unsupported pseudo-type");
aRv.SetNull();
}
}
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();
RequestRestyle(EffectCompositor::RestyleType::Layer);
nsAutoAnimationMutationBatch mb(mTarget->mElement->OwnerDoc());
if (mAnimation) {
MutationObservers::NotifyAnimationRemoved(mAnimation);
}
}
mTarget = newTarget;
if (mTarget) {
UpdateTargetRegistration();
RefPtr<ComputedStyle> computedStyle = GetTargetComputedStyle(Flush::None);
if (computedStyle) {
UpdateProperties(computedStyle);
}
RequestRestyle(EffectCompositor::RestyleType::Layer);
nsAutoAnimationMutationBatch mb(mTarget->mElement->OwnerDoc());
if (mAnimation) {
MutationObservers::NotifyAnimationAdded(mAnimation);
mAnimation->ReschedulePendingTasks();
}
}
if (mAnimation) {
mAnimation->NotifyEffectTargetUpdated();
}
}
static void CreatePropertyValue(
nsCSSPropertyID aProperty, float aOffset,
const Maybe<ComputedTimingFunction>& aTimingFunction,
const AnimationValue& aValue, dom::CompositeOperation aComposite,
AnimationPropertyValueDetails& aResult) {
aResult.mOffset = aOffset;
if (!aValue.IsNull()) {
nsString stringValue;
aValue.SerializeSpecifiedValue(aProperty, stringValue);
aResult.mValue.Construct(stringValue);
}
if (aTimingFunction) {
aResult.mEasing.Construct();
aTimingFunction->AppendToString(aResult.mEasing.Value());
} else {
aResult.mEasing.Construct(NS_LITERAL_STRING("linear"));
}
aResult.mComposite = aComposite;
}
void KeyframeEffect::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;
nsAutoString 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,
segment.mFromComposite, 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, segment.mToComposite, 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 KeyframeEffect::GetKeyframes(JSContext*& aCx, nsTArray<JSObject*>& aResult,
ErrorResult& aRv) const {
MOZ_ASSERT(aResult.IsEmpty());
MOZ_ASSERT(!aRv.Failed());
if (!aResult.SetCapacity(mKeyframes.Length(), mozilla::fallible)) {
aRv.Throw(NS_ERROR_OUT_OF_MEMORY);
return;
}
bool isCSSAnimation = mAnimation && mAnimation->AsCSSAnimation();
// For Servo, when we have CSS Animation @keyframes with variables, we convert
// shorthands to longhands if needed, and store a reference to the unparsed
// value. When it comes time to serialize, however, what do you serialize for
// a longhand that comes from a variable reference in a shorthand? Servo says,
// "an empty string" which is not particularly helpful.
//
// We should just store shorthands as-is (bug 1391537) and then return the
// variable references, but for now, since we don't do that, and in order to
// be consistent with Gecko, we just expand the variables (assuming we have
// enough context to do so). For that we need to grab the ComputedStyle so we
// know what custom property values to provide.
RefPtr<ComputedStyle> computedStyle;
if (isCSSAnimation) {
// The following will flush style but that's ok since if you update
// a variable's computed value, you expect to see that updated value in the
// result of getKeyframes().
//
// If we don't have a target, the following will return null. In that case
// we might end up returning variables as-is or empty string. That should be
// acceptable however, since such a case is rare and this is only
// short-term (and unshipped) behavior until bug 1391537 is fixed.
computedStyle = GetTargetComputedStyle(Flush::Style);
}
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());
}
MOZ_ASSERT(keyframe.mComputedOffset != Keyframe::kComputedOffsetNotSet,
"Invalid computed offset");
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".
keyframeDict.mComposite = keyframe.mComposite;
JS::Rooted<JS::Value> keyframeJSValue(aCx);
if (!ToJSValue(aCx, keyframeDict, &keyframeJSValue)) {
aRv.Throw(NS_ERROR_FAILURE);
return;
}
RefPtr<RawServoDeclarationBlock> customProperties;
// A workaround for CSS Animations in servo backend, custom properties in
// keyframe are stored in a servo's declaration block. Find the declaration
// block to resolve CSS variables in the keyframe.
// This workaround will be solved by bug 1391537.
if (isCSSAnimation) {
for (const PropertyValuePair& propertyValue : keyframe.mPropertyValues) {
if (propertyValue.mProperty ==
nsCSSPropertyID::eCSSPropertyExtra_variable) {
customProperties = propertyValue.mServoDeclarationBlock;
break;
}
}
}
JS::Rooted<JSObject*> keyframeObject(aCx, &keyframeJSValue.toObject());
for (const PropertyValuePair& propertyValue : keyframe.mPropertyValues) {
nsAutoString stringValue;
// Don't serialize the custom properties for this keyframe.
if (propertyValue.mProperty ==
nsCSSPropertyID::eCSSPropertyExtra_variable) {
continue;
}
if (propertyValue.mServoDeclarationBlock) {
Servo_DeclarationBlock_SerializeOneValue(
propertyValue.mServoDeclarationBlock, propertyValue.mProperty,
&stringValue, computedStyle, customProperties);
} else {
RawServoAnimationValue* value =
mBaseValues.GetWeak(propertyValue.mProperty);
if (value) {
Servo_AnimationValue_Serialize(value, propertyValue.mProperty,
&stringValue);
}
}
// Basically, we need to do the mapping:
// * eCSSProperty_offset => "cssOffset"
// * eCSSProperty_float => "cssFloat"
// This means if property refers to the CSS "offset"/"float" property,
// return the string "cssOffset"/"cssFloat". (So avoid overlapping
// "offset" property in BaseKeyframe.)
// https://drafts.csswg.org/web-animations/#property-name-conversion
const char* name = nullptr;
switch (propertyValue.mProperty) {
case nsCSSPropertyID::eCSSProperty_offset:
name = "cssOffset";
break;
case nsCSSPropertyID::eCSSProperty_float:
// FIXME: Bug 1582314: Should handle cssFloat manually if we remove it
// from nsCSSProps::PropertyIDLName().
default:
name = nsCSSProps::PropertyIDLName(propertyValue.mProperty);
}
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
KeyframeEffect::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 KeyframeEffect::CanThrottleIfNotVisible(nsIFrame& aFrame) const {
// Unless we are newly in-effect, 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 (!mInEffectOnLastAnimationTimingUpdate || !CanIgnoreIfNotVisible()) {
return false;
}
PresShell* presShell = GetPresShell();
if (presShell && !presShell->IsActive()) {
return true;
}
const bool isVisibilityHidden =
!aFrame.IsVisibleOrMayHaveVisibleDescendants();
if ((!isVisibilityHidden || HasVisibilityChange()) &&
!aFrame.IsScrolledOutOfView()) {
return false;
}
// If there are no overflow change hints, we don't need to worry about
// unthrottling the animation periodically to update scrollbar positions for
// the overflow region.
if (!HasPropertiesThatMightAffectOverflow()) {
return true;
}
// Don't throttle finite animations since the animation might suddenly
// come into view and if it was throttled it will be out-of-sync.
if (HasFiniteActiveDuration()) {
return false;
}
return isVisibilityHidden ? CanThrottleOverflowChangesInScrollable(aFrame)
: CanThrottleOverflowChanges(aFrame);
}
bool KeyframeEffect::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 = GetStyleFrame();
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;
}
if (CanThrottleIfNotVisible(*frame)) {
return true;
}
EffectSet* effectSet = nullptr;
for (const AnimationProperty& property : mProperties) {
if (!property.mIsRunningOnCompositor) {
return false;
}
MOZ_ASSERT(nsCSSPropertyIDSet::CompositorAnimatables().HasProperty(
property.mProperty),
"The property should be able to run on the compositor");
if (!effectSet) {
effectSet =
EffectSet::GetEffectSet(mTarget->mElement, mTarget->mPseudoType);
MOZ_ASSERT(effectSet,
"CanThrottle should be called on an effect "
"associated with a target element");
}
MOZ_ASSERT(HasEffectiveAnimationOfProperty(property.mProperty, *effectSet),
"There should be an effective animation of the property while "
"it is marked as being run on the compositor");
DisplayItemType displayItemType =
LayerAnimationInfo::GetDisplayItemTypeForProperty(property.mProperty);
// Note that AnimationInfo::GetGenarationFromFrame() is supposed to work
// with the primary frame instead of the style frame.
Maybe<uint64_t> generation = layers::AnimationInfo::GetGenerationFromFrame(
GetPrimaryFrame(), displayItemType);
// Unthrottle if the animation needs to be brought up to date
if (!generation || effectSet->GetAnimationGeneration() != *generation) {
return false;
}
// If this is a transform animation that affects the overflow region,
// we should unthrottle the animation periodically.
if (HasPropertiesThatMightAffectOverflow() &&
!CanThrottleOverflowChangesInScrollable(*frame)) {
return false;
}
}
return true;
}
bool KeyframeEffect::CanThrottleOverflowChanges(const nsIFrame& aFrame) const {
TimeStamp now = aFrame.PresContext()->RefreshDriver()->MostRecentRefresh();
EffectSet* effectSet =
EffectSet::GetEffectSet(mTarget->mElement, mTarget->mPseudoType);
MOZ_ASSERT(effectSet,
"CanOverflowTransformChanges is expected to be called"
" on an effect in an effect set");
MOZ_ASSERT(mAnimation,
"CanOverflowTransformChanges is expected to be called"
" on an effect with a parent animation");
TimeStamp lastSyncTime = effectSet->LastOverflowAnimationSyncTime();
// If this animation can cause overflow, we can throttle some of the ticks.
return (!lastSyncTime.IsNull() &&
(now - lastSyncTime) < OverflowRegionRefreshInterval());
}
bool KeyframeEffect::CanThrottleOverflowChangesInScrollable(
nsIFrame& aFrame) const {
// If the target element is not associated with any documents, we don't care
// it.
Document* doc = GetRenderedDocument();
if (!doc) {
return true;
}
bool hasIntersectionObservers = doc->HasIntersectionObservers();
// If we know that the animation cannot cause overflow,
// we can just disable flushes for this animation.
// If we don't show scrollbars and have no intersection observers, we don't
// care about overflow.
if (LookAndFeel::GetInt(LookAndFeel::eIntID_ShowHideScrollbars) == 0 &&
!hasIntersectionObservers) {
return true;
}
if (CanThrottleOverflowChanges(aFrame)) {
return true;
}
// If we have any intersection observers, we unthrottle this transform
// animation periodically.
if (hasIntersectionObservers) {
return false;
}
// If the nearest scrollable ancestor has overflow:hidden,
// we don't care about overflow.
nsIScrollableFrame* scrollable =
nsLayoutUtils::GetNearestScrollableFrame(&aFrame);
if (!scrollable) {
return true;
}
ScrollStyles ss = scrollable->GetScrollStyles();
if (ss.mVertical == StyleOverflow::Hidden &&
ss.mHorizontal == StyleOverflow::Hidden &&
scrollable->GetLogicalScrollPosition() == nsPoint(0, 0)) {
return true;
}
return false;
}
nsIFrame* KeyframeEffect::GetStyleFrame() const {
nsIFrame* frame = GetPrimaryFrame();
if (!frame) {
return nullptr;
}
return nsLayoutUtils::GetStyleFrame(frame);
}
nsIFrame* KeyframeEffect::GetPrimaryFrame() const {
nsIFrame* frame = nullptr;
if (!mTarget) {
return frame;
}
if (mTarget->mPseudoType == PseudoStyleType::before) {
frame = nsLayoutUtils::GetBeforeFrame(mTarget->mElement);
} else if (mTarget->mPseudoType == PseudoStyleType::after) {
frame = nsLayoutUtils::GetAfterFrame(mTarget->mElement);
} else if (mTarget->mPseudoType == PseudoStyleType::marker) {
frame = nsLayoutUtils::GetMarkerFrame(mTarget->mElement);
} else {
frame = mTarget->mElement->GetPrimaryFrame();
MOZ_ASSERT(mTarget->mPseudoType == PseudoStyleType::NotPseudo,
"unknown mTarget->mPseudoType");
}
return frame;
}
Document* KeyframeEffect::GetRenderedDocument() const {
if (!mTarget) {
return nullptr;
}
return mTarget->mElement->GetComposedDoc();
}
PresShell* KeyframeEffect::GetPresShell() const {
Document* doc = GetRenderedDocument();
if (!doc) {
return nullptr;
}
return doc->GetPresShell();
}
/* static */
bool KeyframeEffect::IsGeometricProperty(const nsCSSPropertyID aProperty) {
MOZ_ASSERT(!nsCSSProps::IsShorthand(aProperty),
"Property should be a longhand property");
switch (aProperty) {
case eCSSProperty_bottom:
case eCSSProperty_height:
case eCSSProperty_left:
case eCSSProperty_margin_bottom:
case eCSSProperty_margin_left:
case eCSSProperty_margin_right:
case eCSSProperty_margin_top:
case eCSSProperty_padding_bottom:
case eCSSProperty_padding_left:
case eCSSProperty_padding_right:
case eCSSProperty_padding_top:
case eCSSProperty_right:
case eCSSProperty_top:
case eCSSProperty_width:
return true;
default:
return false;
}
}
/* static */
bool KeyframeEffect::CanAnimateTransformOnCompositor(
const nsIFrame* aFrame,
AnimationPerformanceWarning::Type& aPerformanceWarning /* out */) {
// In some cases, such as when we are simply collecting all the compositor
// animations regardless of the frame on which they run in order to calculate
// change hints, |aFrame| will be the style frame. However, even in that case
// we should look at the primary frame since that is where the transform will
// be applied.
const nsIFrame* primaryFrame =
nsLayoutUtils::GetPrimaryFrameFromStyleFrame(aFrame);
// 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 (primaryFrame->Combines3DTransformWithAncestors() ||
primaryFrame->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 (primaryFrame->BackfaceIsHidden()) {
aPerformanceWarning =
AnimationPerformanceWarning::Type::TransformBackfaceVisibilityHidden;
return false;
}
// Async 'transform' animations of aFrames with SVG transforms is not
// supported. See bug 779599.
if (primaryFrame->IsSVGTransformed()) {
aPerformanceWarning = AnimationPerformanceWarning::Type::TransformSVG;
return false;
}
return true;
}
bool KeyframeEffect::ShouldBlockAsyncTransformAnimations(
const nsIFrame* aFrame, const nsCSSPropertyIDSet& aPropertySet,
AnimationPerformanceWarning::Type& aPerformanceWarning /* out */) const {
EffectSet* effectSet =
EffectSet::GetEffectSet(mTarget->mElement, mTarget->mPseudoType);
// The various transform properties ('transform', 'scale' etc.) get combined
// on the compositor.
//
// As a result, if we have an animation of 'scale' and 'translate', but the
// 'translate' property is covered by an !important rule, we will not be
// able to combine the result on the compositor since we won't have the
// !important rule to incorporate. In that case we should run all the
// transform-related animations on the main thread (where we have the
// !important rule).
nsCSSPropertyIDSet blockedProperties =
effectSet->PropertiesWithImportantRules().Intersect(
effectSet->PropertiesForAnimationsLevel());
if (blockedProperties.Intersects(aPropertySet)) {
aPerformanceWarning =
AnimationPerformanceWarning::Type::TransformIsBlockedByImportantRules;
return true;
}
for (const AnimationProperty& property : mProperties) {
// If there is a property for animations level that is overridden by
// !important rules, it should not block other animations from running
// on the compositor.
// NOTE: We don't currently check for !important rules for properties that
// don't run on the compositor. As result such properties (e.g. margin-left)
// can still block async animations even if they are overridden by
// !important rules.
if (effectSet &&
effectSet->PropertiesWithImportantRules().HasProperty(
property.mProperty) &&
effectSet->PropertiesForAnimationsLevel().HasProperty(
property.mProperty)) {
continue;
}
// Check for geometric properties
if (IsGeometricProperty(property.mProperty)) {
aPerformanceWarning =
AnimationPerformanceWarning::Type::TransformWithGeometricProperties;
return true;
}
// Check for unsupported transform animations
if (LayerAnimationInfo::GetCSSPropertiesFor(DisplayItemType::TYPE_TRANSFORM)
.HasProperty(property.mProperty)) {
if (!CanAnimateTransformOnCompositor(aFrame, aPerformanceWarning)) {
return true;
}
}
}
return false;
}
bool KeyframeEffect::HasGeometricProperties() const {
for (const AnimationProperty& property : mProperties) {
if (IsGeometricProperty(property.mProperty)) {
return true;
}
}
return false;
}
void KeyframeEffect::SetPerformanceWarning(
const nsCSSPropertyIDSet& aPropertySet,
const AnimationPerformanceWarning& aWarning) {
nsCSSPropertyIDSet curr = aPropertySet;
for (AnimationProperty& property : mProperties) {
if (!curr.HasProperty(property.mProperty)) {
continue;
}
property.SetPerformanceWarning(aWarning, mTarget->mElement);
curr.RemoveProperty(property.mProperty);
if (curr.IsEmpty()) {
return;
}
}
}
already_AddRefed<ComputedStyle>
KeyframeEffect::CreateComputedStyleForAnimationValue(
nsCSSPropertyID aProperty, const AnimationValue& aValue,
nsPresContext* aPresContext, const ComputedStyle* aBaseComputedStyle) {
MOZ_ASSERT(aBaseComputedStyle,
"CreateComputedStyleForAnimationValue needs to be called "
"with a valid ComputedStyle");
Element* elementForResolve = EffectCompositor::GetElementToRestyle(
mTarget->mElement, mTarget->mPseudoType);
// The element may be null if, for example, we target a pseudo-element that no
// longer exists.
if (!elementForResolve) {
return nullptr;
}
ServoStyleSet* styleSet = aPresContext->StyleSet();
return styleSet->ResolveServoStyleByAddingAnimation(
elementForResolve, aBaseComputedStyle, aValue.mServo);
}
void KeyframeEffect::CalculateCumulativeChangeHint(
const ComputedStyle* aComputedStyle) {
mCumulativeChangeHint = nsChangeHint(0);
mNeedsStyleData = false;
nsPresContext* presContext =
mTarget ? nsContentUtils::GetContextForContent(mTarget->mElement)
: nullptr;
if (!presContext) {
// Change hints make no sense if we're not rendered.
//
// Actually, we cannot even post them anywhere.
mNeedsStyleData = true;
return;
}
for (const AnimationProperty& property : mProperties) {
// For opacity property we don't produce any change hints that are not
// included in nsChangeHint_Hints_CanIgnoreIfNotVisible so we can throttle
// opacity animations regardless of the change they produce. This
// optimization is particularly important since it allows us to throttle
// opacity animations with missing 0%/100% keyframes.
if (property.mProperty == eCSSProperty_opacity) {
continue;
}
for (const AnimationPropertySegment& segment : property.mSegments) {
// In case composite operation is not 'replace' or value is null,
// we can't throttle animations which will not cause any layout changes
// on invisible elements because we can't calculate the change hint for
// such properties until we compose it.
if (!segment.HasReplaceableValues()) {
if (!nsCSSPropertyIDSet::TransformLikeProperties().HasProperty(
property.mProperty)) {
mCumulativeChangeHint = ~nsChangeHint_Hints_CanIgnoreIfNotVisible;
return;
}
// We try a little harder to optimize transform animations simply
// because they are so common (the second-most commonly animated
// property at the time of writing). So if we encounter a transform
// segment that needs composing with the underlying value, we just add
// all the change hints a transform animation is known to be able to
// generate.
mCumulativeChangeHint |=
nsChangeHint_ComprehensiveAddOrRemoveTransform |
nsChangeHint_UpdatePostTransformOverflow |
nsChangeHint_UpdateTransformLayer;
continue;
}
RefPtr<ComputedStyle> fromContext = CreateComputedStyleForAnimationValue(
property.mProperty, segment.mFromValue, presContext, aComputedStyle);
if (!fromContext) {
mCumulativeChangeHint = ~nsChangeHint_Hints_CanIgnoreIfNotVisible;
mNeedsStyleData = true;
return;
}
RefPtr<ComputedStyle> toContext = CreateComputedStyleForAnimationValue(
property.mProperty, segment.mToValue, presContext, aComputedStyle);
if (!toContext) {
mCumulativeChangeHint = ~nsChangeHint_Hints_CanIgnoreIfNotVisible;
mNeedsStyleData = true;
return;
}
uint32_t equalStructs = 0;
nsChangeHint changeHint =
fromContext->CalcStyleDifference(*toContext, &equalStructs);
mCumulativeChangeHint |= changeHint;
}
}
}
void KeyframeEffect::SetAnimation(Animation* aAnimation) {
if (mAnimation == aAnimation) {
return;
}
// Restyle for the old animation.
RequestRestyle(EffectCompositor::RestyleType::Layer);
mAnimation = aAnimation;
// The order of these function calls is important:
// NotifyAnimationTimingUpdated() need the updated mIsRelevant flag to check
// if it should create the effectSet or not, and MarkCascadeNeedsUpdate()
// needs a valid effectSet, so we should call them in this order.
if (mAnimation) {
mAnimation->UpdateRelevance();
}
NotifyAnimationTimingUpdated(PostRestyleMode::IfNeeded);
if (mAnimation) {
MarkCascadeNeedsUpdate();
}
}
bool KeyframeEffect::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);
}
void KeyframeEffect::MarkCascadeNeedsUpdate() {
if (!mTarget) {
return;
}
EffectSet* effectSet =
EffectSet::GetEffectSet(mTarget->mElement, mTarget->mPseudoType);
if (!effectSet) {
return;
}
effectSet->MarkCascadeNeedsUpdate();
}
/* static */
bool KeyframeEffect::HasComputedTimingChanged(
const ComputedTiming& aComputedTiming,
IterationCompositeOperation aIterationComposite,
const Nullable<double>& aProgressOnLastCompose,
uint64_t aCurrentIterationOnLastCompose) {
// Typically we don't need to request a restyle if the progress hasn't
// changed since the last call to ComposeStyle. The one exception is if the
// iteration composite mode is 'accumulate' and the current iteration has
// changed, since that will often produce a different result.
return aComputedTiming.mProgress != aProgressOnLastCompose ||
(aIterationComposite == IterationCompositeOperation::Accumulate &&
aComputedTiming.mCurrentIteration != aCurrentIterationOnLastCompose);
}
bool KeyframeEffect::HasComputedTimingChanged() const {
ComputedTiming computedTiming = GetComputedTiming();
return HasComputedTimingChanged(
computedTiming, mEffectOptions.mIterationComposite,
mProgressOnLastCompose, mCurrentIterationOnLastCompose);
}
bool KeyframeEffect::ContainsAnimatedScale(const nsIFrame* aFrame) const {
// For display:table content, transform animations run on the table wrapper
// frame. If we are being passed a frame that doesn't support transforms
// (i.e. the inner table frame) we could just return false, but it possibly
// means we looked up the wrong EffectSet so for now we just assert instead.
MOZ_ASSERT(aFrame && aFrame->IsFrameOfType(nsIFrame::eSupportsCSSTransforms),
"We should be passed a frame that supports transforms");
if (!IsCurrent()) {
return false;
}
if (!mAnimation ||
mAnimation->ReplaceState() == AnimationReplaceState::Removed) {
return false;
}
for (const AnimationProperty& prop : mProperties) {
if (prop.mProperty != eCSSProperty_transform &&
prop.mProperty != eCSSProperty_scale &&
prop.mProperty != eCSSProperty_rotate) {
continue;
}
AnimationValue baseStyle = BaseStyle(prop.mProperty);
if (baseStyle.IsNull()) {
// If we failed to get the base style, we consider it has scale value
// here just to be safe.
return true;
}
gfx::Size size = baseStyle.GetScaleValue(aFrame);
if (size != gfx::Size(1.0f, 1.0f)) {
return true;
}
// This is actually overestimate because there are some cases that combining
// the base value and from/to value produces 1:1 scale. But it doesn't
// really matter.
for (const AnimationPropertySegment& segment : prop.mSegments) {
if (!segment.mFromValue.IsNull()) {
gfx::Size from = segment.mFromValue.GetScaleValue(aFrame);
if (from != gfx::Size(1.0f, 1.0f)) {
return true;
}
}
if (!segment.mToValue.IsNull()) {
gfx::Size to = segment.mToValue.GetScaleValue(aFrame);
if (to != gfx::Size(1.0f, 1.0f)) {
return true;
}
}
}
}
return false;
}
void KeyframeEffect::UpdateEffectSet(EffectSet* aEffectSet) const {
if (!mInEffectSet) {
return;
}
EffectSet* effectSet =
aEffectSet
? aEffectSet
: EffectSet::GetEffectSet(mTarget->mElement, mTarget->mPseudoType);
if (!effectSet) {
return;
}
nsIFrame* styleFrame = GetStyleFrame();
if (HasAnimationOfPropertySet(nsCSSPropertyIDSet::OpacityProperties())) {
effectSet->SetMayHaveOpacityAnimation();
EnumerateContinuationsOrIBSplitSiblings(styleFrame, [](nsIFrame* aFrame) {
aFrame->SetMayHaveOpacityAnimation();
});
}
nsIFrame* primaryFrame = GetPrimaryFrame();
if (HasAnimationOfPropertySet(
nsCSSPropertyIDSet::TransformLikeProperties())) {
effectSet->SetMayHaveTransformAnimation();
// For table frames, it's not clear if we should iterate over the
// continuations of the table wrapper or the inner table frame.
//
// Fortunately, this is not currently an issue because we only split tables
// when printing (page breaks) where we don't run animations.
EnumerateContinuationsOrIBSplitSiblings(primaryFrame, [](nsIFrame* aFrame) {
aFrame->SetMayHaveTransformAnimation();
});
}
}
KeyframeEffect::MatchForCompositor KeyframeEffect::IsMatchForCompositor(
const nsCSSPropertyIDSet& aPropertySet, const nsIFrame* aFrame,
const EffectSet& aEffects,
AnimationPerformanceWarning::Type& aPerformanceWarning /* out */) const {
MOZ_ASSERT(mAnimation);
if (!mAnimation->IsRelevant()) {
return KeyframeEffect::MatchForCompositor::No;
}
if (mAnimation->ShouldBeSynchronizedWithMainThread(aPropertySet, aFrame,
aPerformanceWarning)) {
// For a given |aFrame|, we don't want some animations of |aProperty| to
// run on the compositor and others to run on the main thread, so if any
// need to be synchronized with the main thread, run them all there.
return KeyframeEffect::MatchForCompositor::NoAndBlockThisProperty;
}
if (!HasEffectiveAnimationOfPropertySet(aPropertySet, aEffects)) {
return KeyframeEffect::MatchForCompositor::No;
}
// If we know that the animation is not visible, we don't need to send the
// animation to the compositor.
if (!aFrame->IsVisibleOrMayHaveVisibleDescendants() ||
aFrame->IsScrolledOutOfView()) {
return KeyframeEffect::MatchForCompositor::NoAndBlockThisProperty;
}
if (aPropertySet.HasProperty(eCSSProperty_background_color)) {
if (!StaticPrefs::gfx_omta_background_color()) {
return KeyframeEffect::MatchForCompositor::No;
}
if (nsIContent* content = aFrame->GetContent()) {
RefPtr<layers::LayerManager> layerManager =
nsContentUtils::LayerManagerForContent(content);
if (layerManager &&
layerManager->GetBackendType() == layers::LayersBackend::LAYERS_WR) {
// Bug 1510030: We don't yet support background-color animations on the
// compositor for WebRender.
return KeyframeEffect::MatchForCompositor::No;
}
}
}
return mAnimation->IsPlaying() ? KeyframeEffect::MatchForCompositor::Yes
: KeyframeEffect::MatchForCompositor::IfNeeded;
}
} // namespace dom
} // namespace mozilla
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