gecko-dev/dom/animation/EffectCompositor.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 "EffectCompositor.h"
#include <bitset>
#include <initializer_list>
#include "mozilla/dom/Animation.h"
#include "mozilla/dom/Element.h"
#include "mozilla/dom/KeyframeEffectReadOnly.h"
#include "mozilla/AnimationComparator.h"
#include "mozilla/AnimationPerformanceWarning.h"
#include "mozilla/AnimationTarget.h"
#include "mozilla/AnimationUtils.h"
#include "mozilla/AutoRestore.h"
#include "mozilla/EffectSet.h"
#include "mozilla/GeckoStyleContext.h"
#include "mozilla/LayerAnimationInfo.h"
#include "mozilla/RestyleManager.h"
#include "mozilla/RestyleManagerInlines.h"
#include "mozilla/ServoBindings.h" // Servo_GetProperties_Overriding_Animation
#include "mozilla/ServoStyleSet.h"
#include "mozilla/StyleAnimationValue.h"
#include "mozilla/TypeTraits.h" // For Forward<>
#include "nsComputedDOMStyle.h" // nsComputedDOMStyle::GetPresShellForContent
#include "nsContentUtils.h"
#include "nsCSSPseudoElements.h"
#include "nsCSSPropertyIDSet.h"
#include "nsCSSProps.h"
#include "nsAtom.h"
#include "nsIPresShell.h"
#include "nsIPresShellInlines.h"
#include "nsLayoutUtils.h"
#include "nsRuleNode.h" // For nsRuleNode::ComputePropertiesOverridingAnimation
#include "nsRuleProcessorData.h" // For ElementRuleProcessorData etc.
#include "nsStyleContextInlines.h"
#include "nsTArray.h"
#include "PendingAnimationTracker.h"
using mozilla::dom::Animation;
using mozilla::dom::Element;
using mozilla::dom::KeyframeEffectReadOnly;
namespace mozilla {
NS_IMPL_CYCLE_COLLECTION_CLASS(EffectCompositor)
NS_IMPL_CYCLE_COLLECTION_UNLINK_BEGIN(EffectCompositor)
for (auto& elementSet : tmp->mElementsToRestyle) {
elementSet.Clear();
}
NS_IMPL_CYCLE_COLLECTION_UNLINK_END
NS_IMPL_CYCLE_COLLECTION_TRAVERSE_BEGIN(EffectCompositor)
for (auto& elementSet : tmp->mElementsToRestyle) {
for (auto iter = elementSet.Iter(); !iter.Done(); iter.Next()) {
CycleCollectionNoteChild(cb, iter.Key().mElement,
"EffectCompositor::mElementsToRestyle[]",
cb.Flags());
}
}
NS_IMPL_CYCLE_COLLECTION_TRAVERSE_END
NS_IMPL_CYCLE_COLLECTION_ROOT_NATIVE(EffectCompositor, AddRef)
NS_IMPL_CYCLE_COLLECTION_UNROOT_NATIVE(EffectCompositor, Release)
namespace {
enum class MatchForCompositor {
// This animation matches and should run on the compositor if possible.
Yes,
// This (not currently playing) animation matches and can be run on the
// compositor if there are other animations for this property that return
// 'Yes'.
IfNeeded,
// This animation does not match or can't be run on the compositor.
No,
// This animation does not match or can't be run on the compositor and,
// furthermore, its presence means we should not run any animations for this
// property on the compositor.
NoAndBlockThisProperty
};
}
static MatchForCompositor
IsMatchForCompositor(const KeyframeEffectReadOnly& aEffect,
nsCSSPropertyID aProperty,
const nsIFrame* aFrame)
{
const Animation* animation = aEffect.GetAnimation();
MOZ_ASSERT(animation);
if (!animation->IsRelevant()) {
return MatchForCompositor::No;
}
AnimationPerformanceWarning::Type warningType;
if (animation->ShouldBeSynchronizedWithMainThread(aProperty, aFrame,
warningType)) {
EffectCompositor::SetPerformanceWarning(
aFrame, aProperty,
AnimationPerformanceWarning(warningType));
// 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 MatchForCompositor::NoAndBlockThisProperty;
}
if (!aEffect.HasEffectiveAnimationOfProperty(aProperty)) {
return MatchForCompositor::No;
}
return animation->IsPlaying()
? MatchForCompositor::Yes
: MatchForCompositor::IfNeeded;
}
// Helper function to factor out the common logic from
// GetAnimationsForCompositor and HasAnimationsForCompositor.
//
// Takes an optional array to fill with eligible animations.
//
// Returns true if there are eligible animations, false otherwise.
bool
FindAnimationsForCompositor(const nsIFrame* aFrame,
nsCSSPropertyID aProperty,
nsTArray<RefPtr<dom::Animation>>* aMatches /*out*/)
{
MOZ_ASSERT(!aMatches || aMatches->IsEmpty(),
"Matches array, if provided, should be empty");
EffectSet* effects = EffectSet::GetEffectSet(aFrame);
if (!effects || effects->IsEmpty()) {
return false;
}
// First check for newly-started transform animations that should be
// synchronized with geometric animations. We need to do this before any
// other early returns (the one above is ok) since we can only check this
// state when the animation is newly-started.
if (aProperty == eCSSProperty_transform) {
PendingAnimationTracker* tracker =
aFrame->PresContext()->Document()->GetPendingAnimationTracker();
if (tracker) {
tracker->MarkAnimationsThatMightNeedSynchronization();
}
}
// If the property will be added to the animations level of the cascade but
// there is an !important rule for that property in the cascade then the
// animation will not be applied since the !important rule overrides it.
if (effects->PropertiesWithImportantRules().HasProperty(aProperty) &&
effects->PropertiesForAnimationsLevel().HasProperty(aProperty)) {
return false;
}
if (aFrame->RefusedAsyncAnimation()) {
return false;
}
// The animation cascade will almost always be up-to-date by this point
// but there are some cases such as when we are restoring the refresh driver
// from test control after seeking where it might not be the case.
//
// Those cases are probably not important but just to be safe, let's make
// sure the cascade is up to date since if it *is* up to date, this is
// basically a no-op.
Maybe<NonOwningAnimationTarget> pseudoElement =
EffectCompositor::GetAnimationElementAndPseudoForFrame(aFrame);
if (pseudoElement) {
StyleBackendType backend =
aFrame->StyleContext()->IsServo()
? StyleBackendType::Servo
: StyleBackendType::Gecko;
EffectCompositor::MaybeUpdateCascadeResults(backend,
pseudoElement->mElement,
pseudoElement->mPseudoType,
aFrame->StyleContext());
}
if (!nsLayoutUtils::AreAsyncAnimationsEnabled()) {
if (nsLayoutUtils::IsAnimationLoggingEnabled()) {
nsCString message;
message.AppendLiteral("Performance warning: Async animations are "
"disabled");
AnimationUtils::LogAsyncAnimationFailure(message);
}
return false;
}
// Disable async animations if we have a rendering observer that
// depends on our content (svg masking, -moz-element etc) so that
// it gets updated correctly.
nsIContent* content = aFrame->GetContent();
while (content) {
if (content->HasRenderingObservers()) {
EffectCompositor::SetPerformanceWarning(
aFrame, aProperty,
AnimationPerformanceWarning(
AnimationPerformanceWarning::Type::HasRenderingObserver));
return false;
}
content = content->GetParent();
}
bool foundRunningAnimations = false;
for (KeyframeEffectReadOnly* effect : *effects) {
MatchForCompositor matchResult =
IsMatchForCompositor(*effect, aProperty, aFrame);
if (matchResult == MatchForCompositor::NoAndBlockThisProperty) {
// 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.
if (aMatches) {
aMatches->Clear();
}
return false;
}
if (matchResult == MatchForCompositor::No) {
continue;
}
if (aMatches) {
aMatches->AppendElement(effect->GetAnimation());
}
if (matchResult == MatchForCompositor::Yes) {
foundRunningAnimations = true;
}
}
// If all animations we added were not currently playing animations, don't
// send them to the compositor.
if (aMatches && !foundRunningAnimations) {
aMatches->Clear();
}
MOZ_ASSERT(!foundRunningAnimations || !aMatches || !aMatches->IsEmpty(),
"If return value is true, matches array should be non-empty");
if (aMatches && foundRunningAnimations) {
aMatches->Sort(AnimationPtrComparator<RefPtr<dom::Animation>>());
}
return foundRunningAnimations;
}
void
EffectCompositor::RequestRestyle(dom::Element* aElement,
CSSPseudoElementType aPseudoType,
RestyleType aRestyleType,
CascadeLevel aCascadeLevel)
{
if (!mPresContext) {
// Pres context will be null after the effect compositor is disconnected.
return;
}
// Ignore animations on orphaned elements and elements in documents without
// a pres shell (e.g. XMLHttpRequest responseXML documents).
if (!nsComputedDOMStyle::GetPresShellForContent(aElement)) {
return;
}
auto& elementsToRestyle = mElementsToRestyle[aCascadeLevel];
PseudoElementHashEntry::KeyType key = { aElement, aPseudoType };
if (aRestyleType == RestyleType::Throttled) {
elementsToRestyle.LookupForAdd(key).OrInsert([]() { return false; });
mPresContext->PresShell()->SetNeedThrottledAnimationFlush();
} else {
bool skipRestyle;
// Update hashtable first in case PostRestyleForAnimation mutates it.
// (It shouldn't, but just to be sure.)
if (auto p = elementsToRestyle.LookupForAdd(key)) {
skipRestyle = p.Data();
p.Data() = true;
} else {
skipRestyle = false;
p.OrInsert([]() { return true; });
}
if (!skipRestyle) {
PostRestyleForAnimation(aElement, aPseudoType, aCascadeLevel);
}
}
if (aRestyleType == RestyleType::Layer) {
mPresContext->RestyleManager()->IncrementAnimationGeneration();
EffectSet* effectSet =
EffectSet::GetEffectSet(aElement, aPseudoType);
if (effectSet) {
effectSet->UpdateAnimationGeneration(mPresContext);
}
}
}
void
EffectCompositor::PostRestyleForAnimation(dom::Element* aElement,
CSSPseudoElementType aPseudoType,
CascadeLevel aCascadeLevel)
{
if (!mPresContext) {
return;
}
dom::Element* element = GetElementToRestyle(aElement, aPseudoType);
if (!element) {
return;
}
nsRestyleHint hint = aCascadeLevel == CascadeLevel::Transitions ?
eRestyle_CSSTransitions :
eRestyle_CSSAnimations;
if (mPresContext->StyleSet()->IsServo()) {
MOZ_ASSERT(NS_IsMainThread(),
"Restyle request during restyling should be requested only on "
"the main-thread. e.g. after the parallel traversal");
if (ServoStyleSet::IsInServoTraversal() || mIsInPreTraverse) {
MOZ_ASSERT(hint == eRestyle_CSSAnimations ||
hint == eRestyle_CSSTransitions);
// We can't call Servo_NoteExplicitHints here since AtomicRefCell does not
// allow us mutate ElementData of the |aElement| in SequentialTask.
// Instead we call Servo_NoteExplicitHints for the element in PreTraverse()
// which will be called right before the second traversal that we do for
// updating CSS animations.
// In that case PreTraverse() will return true so that we know to do the
// second traversal so we don't need to post any restyle requests to the
// PresShell.
return;
} else {
MOZ_ASSERT(!mPresContext->RestyleManager()->IsInStyleRefresh());
}
}
mPresContext->PresShell()->RestyleForAnimation(element, hint);
}
void
EffectCompositor::PostRestyleForThrottledAnimations()
{
for (size_t i = 0; i < kCascadeLevelCount; i++) {
CascadeLevel cascadeLevel = CascadeLevel(i);
auto& elementSet = mElementsToRestyle[cascadeLevel];
for (auto iter = elementSet.Iter(); !iter.Done(); iter.Next()) {
bool& postedRestyle = iter.Data();
if (postedRestyle) {
continue;
}
PostRestyleForAnimation(iter.Key().mElement,
iter.Key().mPseudoType,
cascadeLevel);
postedRestyle = true;
}
}
}
template<typename StyleType>
void
EffectCompositor::UpdateEffectProperties(StyleType* aStyleType,
Element* aElement,
CSSPseudoElementType aPseudoType)
{
EffectSet* effectSet = EffectSet::GetEffectSet(aElement, aPseudoType);
if (!effectSet) {
return;
}
// Style context (Gecko) or computed values (Stylo) change might cause CSS
// cascade level, e.g removing !important, so we should update the cascading
// result.
effectSet->MarkCascadeNeedsUpdate();
for (KeyframeEffectReadOnly* effect : *effectSet) {
effect->UpdateProperties(aStyleType);
}
}
void
EffectCompositor::MaybeUpdateAnimationRule(dom::Element* aElement,
CSSPseudoElementType aPseudoType,
CascadeLevel aCascadeLevel,
nsStyleContext* aStyleContext)
{
// First update cascade results since that may cause some elements to
// be marked as needing a restyle.
MaybeUpdateCascadeResults(StyleBackendType::Gecko,
aElement, aPseudoType,
aStyleContext);
auto& elementsToRestyle = mElementsToRestyle[aCascadeLevel];
PseudoElementHashEntry::KeyType key = { aElement, aPseudoType };
if (!elementsToRestyle.Contains(key)) {
return;
}
ComposeAnimationRule(aElement, aPseudoType, aCascadeLevel);
elementsToRestyle.Remove(key);
}
nsIStyleRule*
EffectCompositor::GetAnimationRule(dom::Element* aElement,
CSSPseudoElementType aPseudoType,
CascadeLevel aCascadeLevel,
nsStyleContext* aStyleContext)
{
// NOTE: We need to be careful about early returns in this method where
// we *don't* update mElementsToRestyle. When we get a call to
// RequestRestyle that results in a call to PostRestyleForAnimation, we
// will set a bool flag in mElementsToRestyle indicating that we've
// called PostRestyleForAnimation so we don't need to call it again
// until that restyle happens. During that restyle, if we arrive here
// and *don't* update mElementsToRestyle we'll continue to skip calling
// PostRestyleForAnimation from RequestRestyle.
if (!mPresContext || !mPresContext->IsDynamic()) {
// For print or print preview, ignore animations.
return nullptr;
}
MOZ_ASSERT(mPresContext->RestyleManager()->IsGecko(),
"stylo: Servo-backed style system should not be using "
"EffectCompositor");
if (mPresContext->RestyleManager()->AsGecko()->SkipAnimationRules()) {
// We don't need to worry about updating mElementsToRestyle in this case
// since this is not the animation restyle we requested when we called
// PostRestyleForAnimation (see comment at start of this method).
return nullptr;
}
MaybeUpdateAnimationRule(aElement, aPseudoType, aCascadeLevel, aStyleContext);
#ifdef DEBUG
{
auto& elementsToRestyle = mElementsToRestyle[aCascadeLevel];
PseudoElementHashEntry::KeyType key = { aElement, aPseudoType };
MOZ_ASSERT(!elementsToRestyle.Contains(key),
"Element should no longer require a restyle after its "
"animation rule has been updated");
}
#endif
EffectSet* effectSet = EffectSet::GetEffectSet(aElement, aPseudoType);
if (!effectSet) {
return nullptr;
}
return effectSet->AnimationRule(aCascadeLevel);
}
namespace {
class EffectCompositeOrderComparator {
public:
bool Equals(const KeyframeEffectReadOnly* a,
const KeyframeEffectReadOnly* b) const
{
return a == b;
}
bool LessThan(const KeyframeEffectReadOnly* a,
const KeyframeEffectReadOnly* b) const
{
MOZ_ASSERT(a->GetAnimation() && b->GetAnimation());
MOZ_ASSERT(
Equals(a, b) ||
a->GetAnimation()->HasLowerCompositeOrderThan(*b->GetAnimation()) !=
b->GetAnimation()->HasLowerCompositeOrderThan(*a->GetAnimation()));
return a->GetAnimation()->HasLowerCompositeOrderThan(*b->GetAnimation());
}
};
}
bool
EffectCompositor::GetServoAnimationRule(
const dom::Element* aElement,
CSSPseudoElementType aPseudoType,
CascadeLevel aCascadeLevel,
RawServoAnimationValueMapBorrowedMut aAnimationValues)
{
MOZ_ASSERT(aAnimationValues);
MOZ_ASSERT(mPresContext && mPresContext->IsDynamic(),
"Should not be in print preview");
// Gecko_GetAnimationRule should have already checked this
MOZ_ASSERT(nsComputedDOMStyle::GetPresShellForContent(aElement),
"Should not be trying to run animations on elements in documents"
" without a pres shell (e.g. XMLHttpRequest documents)");
EffectSet* effectSet = EffectSet::GetEffectSet(aElement, aPseudoType);
if (!effectSet) {
return false;
}
// Get a list of effects sorted by composite order.
nsTArray<KeyframeEffectReadOnly*> sortedEffectList(effectSet->Count());
for (KeyframeEffectReadOnly* effect : *effectSet) {
sortedEffectList.AppendElement(effect);
}
sortedEffectList.Sort(EffectCompositeOrderComparator());
// If multiple animations affect the same property, animations with higher
// composite order (priority) override or add or animations with lower
// priority.
const nsCSSPropertyIDSet propertiesToSkip =
aCascadeLevel == CascadeLevel::Animations
? effectSet->PropertiesForAnimationsLevel().Inverse()
: effectSet->PropertiesForAnimationsLevel();
for (KeyframeEffectReadOnly* effect : sortedEffectList) {
effect->GetAnimation()->ComposeStyle(*aAnimationValues, propertiesToSkip);
}
MOZ_ASSERT(effectSet == EffectSet::GetEffectSet(aElement, aPseudoType),
"EffectSet should not change while composing style");
return true;
}
/* static */ dom::Element*
EffectCompositor::GetElementToRestyle(dom::Element* aElement,
CSSPseudoElementType aPseudoType)
{
if (aPseudoType == CSSPseudoElementType::NotPseudo) {
return aElement;
}
if (aPseudoType == CSSPseudoElementType::before) {
return nsLayoutUtils::GetBeforePseudo(aElement);
}
if (aPseudoType == CSSPseudoElementType::after) {
return nsLayoutUtils::GetAfterPseudo(aElement);
}
NS_NOTREACHED("Should not try to get the element to restyle for a pseudo "
"other that :before or :after");
return nullptr;
}
bool
EffectCompositor::HasPendingStyleUpdates() const
{
for (auto& elementSet : mElementsToRestyle) {
if (elementSet.Count()) {
return true;
}
}
return false;
}
bool
EffectCompositor::HasThrottledStyleUpdates() const
{
for (auto& elementSet : mElementsToRestyle) {
for (auto iter = elementSet.ConstIter(); !iter.Done(); iter.Next()) {
if (!iter.Data()) {
return true;
}
}
}
return false;
}
void
EffectCompositor::AddStyleUpdatesTo(RestyleTracker& aTracker)
{
if (!mPresContext) {
return;
}
for (size_t i = 0; i < kCascadeLevelCount; i++) {
CascadeLevel cascadeLevel = CascadeLevel(i);
auto& elementSet = mElementsToRestyle[cascadeLevel];
// Copy the list of elements to restyle to a separate array that we can
// iterate over. This is because we need to call MaybeUpdateCascadeResults
// on each element, but doing that can mutate elementSet. In this case
// it will only mutate the bool value associated with each element in the
// set but even doing that will cause assertions in PLDHashTable to fail
// if we are iterating over the hashtable at the same time.
nsTArray<PseudoElementHashEntry::KeyType> elementsToRestyle(
elementSet.Count());
for (auto iter = elementSet.Iter(); !iter.Done(); iter.Next()) {
// Skip animations on elements that have been orphaned since they
// requested a restyle.
if (iter.Key().mElement->IsInComposedDoc()) {
elementsToRestyle.AppendElement(iter.Key());
}
}
for (auto& pseudoElem : elementsToRestyle) {
MaybeUpdateCascadeResults(StyleBackendType::Gecko,
pseudoElem.mElement,
pseudoElem.mPseudoType,
nullptr);
ComposeAnimationRule(pseudoElem.mElement,
pseudoElem.mPseudoType,
cascadeLevel);
dom::Element* elementToRestyle =
GetElementToRestyle(pseudoElem.mElement, pseudoElem.mPseudoType);
if (elementToRestyle) {
nsRestyleHint rshint = cascadeLevel == CascadeLevel::Transitions ?
eRestyle_CSSTransitions :
eRestyle_CSSAnimations;
aTracker.AddPendingRestyle(elementToRestyle, rshint, nsChangeHint(0));
}
}
elementSet.Clear();
// Note: mElement pointers in elementsToRestyle might now dangle
}
}
/* static */ bool
EffectCompositor::HasAnimationsForCompositor(const nsIFrame* aFrame,
nsCSSPropertyID aProperty)
{
return FindAnimationsForCompositor(aFrame, aProperty, nullptr);
}
/* static */ nsTArray<RefPtr<dom::Animation>>
EffectCompositor::GetAnimationsForCompositor(const nsIFrame* aFrame,
nsCSSPropertyID aProperty)
{
nsTArray<RefPtr<dom::Animation>> result;
#ifdef DEBUG
bool foundSome =
#endif
FindAnimationsForCompositor(aFrame, aProperty, &result);
MOZ_ASSERT(!foundSome || !result.IsEmpty(),
"If return value is true, matches array should be non-empty");
return result;
}
/* static */ void
EffectCompositor::ClearIsRunningOnCompositor(const nsIFrame *aFrame,
nsCSSPropertyID aProperty)
{
EffectSet* effects = EffectSet::GetEffectSet(aFrame);
if (!effects) {
return;
}
for (KeyframeEffectReadOnly* effect : *effects) {
effect->SetIsRunningOnCompositor(aProperty, false);
}
}
/* static */ void
EffectCompositor::MaybeUpdateCascadeResults(StyleBackendType aBackendType,
Element* aElement,
CSSPseudoElementType aPseudoType,
nsStyleContext* aStyleContext)
{
EffectSet* effects = EffectSet::GetEffectSet(aElement, aPseudoType);
if (!effects || !effects->CascadeNeedsUpdate()) {
return;
}
UpdateCascadeResults(aBackendType, *effects, aElement, aPseudoType,
aStyleContext);
MOZ_ASSERT(!effects->CascadeNeedsUpdate(), "Failed to update cascade state");
}
/* static */ Maybe<NonOwningAnimationTarget>
EffectCompositor::GetAnimationElementAndPseudoForFrame(const nsIFrame* aFrame)
{
// Always return the same object to benefit from return-value optimization.
Maybe<NonOwningAnimationTarget> result;
CSSPseudoElementType pseudoType =
aFrame->StyleContext()->GetPseudoType();
if (pseudoType != CSSPseudoElementType::NotPseudo &&
pseudoType != CSSPseudoElementType::before &&
pseudoType != CSSPseudoElementType::after) {
return result;
}
nsIContent* content = aFrame->GetContent();
if (!content) {
return result;
}
if (pseudoType == CSSPseudoElementType::before ||
pseudoType == CSSPseudoElementType::after) {
content = content->GetParent();
if (!content) {
return result;
}
}
if (!content->IsElement()) {
return result;
}
result.emplace(content->AsElement(), pseudoType);
return result;
}
/* static */ void
EffectCompositor::ComposeAnimationRule(dom::Element* aElement,
CSSPseudoElementType aPseudoType,
CascadeLevel aCascadeLevel)
{
EffectSet* effects = EffectSet::GetEffectSet(aElement, aPseudoType);
if (!effects) {
return;
}
// The caller is responsible for calling MaybeUpdateCascadeResults first.
MOZ_ASSERT(!effects->CascadeNeedsUpdate(),
"Animation cascade out of date when composing animation rule");
// Get a list of effects sorted by composite order.
nsTArray<KeyframeEffectReadOnly*> sortedEffectList(effects->Count());
for (KeyframeEffectReadOnly* effect : *effects) {
sortedEffectList.AppendElement(effect);
}
sortedEffectList.Sort(EffectCompositeOrderComparator());
RefPtr<AnimValuesStyleRule>& animRule = effects->AnimationRule(aCascadeLevel);
animRule = nullptr;
// If multiple animations affect the same property, animations with higher
// composite order (priority) override or add or animations with lower
// priority except properties in propertiesToSkip.
const nsCSSPropertyIDSet& propertiesToSkip =
aCascadeLevel == CascadeLevel::Animations
? effects->PropertiesForAnimationsLevel().Inverse()
: effects->PropertiesForAnimationsLevel();
for (KeyframeEffectReadOnly* effect : sortedEffectList) {
effect->GetAnimation()->WillComposeStyle();
effect->GetAnimation()->ComposeStyle(animRule, propertiesToSkip);
}
MOZ_ASSERT(effects == EffectSet::GetEffectSet(aElement, aPseudoType),
"EffectSet should not change while composing style");
}
/* static */ nsCSSPropertyIDSet
EffectCompositor::GetOverriddenProperties(StyleBackendType aBackendType,
EffectSet& aEffectSet,
Element* aElement,
CSSPseudoElementType aPseudoType,
nsStyleContext* aStyleContext)
{
MOZ_ASSERT(aBackendType != StyleBackendType::Servo || aElement,
"Should have an element to get style data from if we are using"
" the Servo backend");
nsCSSPropertyIDSet result;
Element* elementToRestyle = GetElementToRestyle(aElement, aPseudoType);
if (aBackendType == StyleBackendType::Gecko && !aStyleContext) {
if (elementToRestyle) {
nsIFrame* frame = elementToRestyle->GetPrimaryFrame();
if (frame) {
aStyleContext = frame->StyleContext();
}
}
if (!aStyleContext) {
return result;
}
} else if (aBackendType == StyleBackendType::Servo && !elementToRestyle) {
return result;
}
AutoTArray<nsCSSPropertyID, LayerAnimationInfo::kRecords> propertiesToTrack;
{
nsCSSPropertyIDSet propertiesToTrackAsSet;
for (KeyframeEffectReadOnly* effect : aEffectSet) {
for (const AnimationProperty& property : effect->Properties()) {
if (nsCSSProps::PropHasFlags(property.mProperty,
CSS_PROPERTY_CAN_ANIMATE_ON_COMPOSITOR) &&
!propertiesToTrackAsSet.HasProperty(property.mProperty)) {
propertiesToTrackAsSet.AddProperty(property.mProperty);
propertiesToTrack.AppendElement(property.mProperty);
}
}
// Skip iterating over the rest of the effects if we've already
// found all the compositor-animatable properties.
if (propertiesToTrack.Length() == LayerAnimationInfo::kRecords) {
break;
}
}
}
if (propertiesToTrack.IsEmpty()) {
return result;
}
switch (aBackendType) {
case StyleBackendType::Servo:
Servo_GetProperties_Overriding_Animation(elementToRestyle,
&propertiesToTrack,
&result);
break;
case StyleBackendType::Gecko:
nsRuleNode::ComputePropertiesOverridingAnimation(propertiesToTrack,
aStyleContext->AsGecko(),
result);
break;
default:
MOZ_ASSERT_UNREACHABLE("Unsupported style backend");
}
return result;
}
/* static */ void
EffectCompositor::UpdateCascadeResults(StyleBackendType aBackendType,
EffectSet& aEffectSet,
Element* aElement,
CSSPseudoElementType aPseudoType,
nsStyleContext* aStyleContext)
{
MOZ_ASSERT(EffectSet::GetEffectSet(aElement, aPseudoType) == &aEffectSet,
"Effect set should correspond to the specified (pseudo-)element");
if (aEffectSet.IsEmpty()) {
aEffectSet.MarkCascadeUpdated();
return;
}
// Get a list of effects sorted by composite order.
nsTArray<KeyframeEffectReadOnly*> sortedEffectList(aEffectSet.Count());
for (KeyframeEffectReadOnly* effect : aEffectSet) {
sortedEffectList.AppendElement(effect);
}
sortedEffectList.Sort(EffectCompositeOrderComparator());
// Get properties that override the *animations* level of the cascade.
//
// We only do this for properties that we can animate on the compositor
// since we will apply other properties on the main thread where the usual
// cascade applies.
nsCSSPropertyIDSet overriddenProperties =
GetOverriddenProperties(aBackendType,
aEffectSet,
aElement, aPseudoType,
aStyleContext);
// Returns a bitset the represents which properties from
// LayerAnimationInfo::sRecords are present in |aPropertySet|.
auto compositorPropertiesInSet =
[](nsCSSPropertyIDSet& aPropertySet) ->
std::bitset<LayerAnimationInfo::kRecords> {
std::bitset<LayerAnimationInfo::kRecords> result;
for (size_t i = 0; i < LayerAnimationInfo::kRecords; i++) {
if (aPropertySet.HasProperty(
LayerAnimationInfo::sRecords[i].mProperty)) {
result.set(i);
}
}
return result;
};
nsCSSPropertyIDSet& propertiesWithImportantRules =
aEffectSet.PropertiesWithImportantRules();
nsCSSPropertyIDSet& propertiesForAnimationsLevel =
aEffectSet.PropertiesForAnimationsLevel();
// Record which compositor-animatable properties were originally set so we can
// compare for changes later.
std::bitset<LayerAnimationInfo::kRecords>
prevCompositorPropertiesWithImportantRules =
compositorPropertiesInSet(propertiesWithImportantRules);
nsCSSPropertyIDSet prevPropertiesForAnimationsLevel =
propertiesForAnimationsLevel;
propertiesWithImportantRules.Empty();
propertiesForAnimationsLevel.Empty();
nsCSSPropertyIDSet propertiesForTransitionsLevel;
for (const KeyframeEffectReadOnly* effect : sortedEffectList) {
MOZ_ASSERT(effect->GetAnimation(),
"Effects on a target element should have an Animation");
CascadeLevel cascadeLevel = effect->GetAnimation()->CascadeLevel();
for (const AnimationProperty& prop : effect->Properties()) {
if (overriddenProperties.HasProperty(prop.mProperty)) {
propertiesWithImportantRules.AddProperty(prop.mProperty);
}
switch (cascadeLevel) {
case EffectCompositor::CascadeLevel::Animations:
propertiesForAnimationsLevel.AddProperty(prop.mProperty);
break;
case EffectCompositor::CascadeLevel::Transitions:
propertiesForTransitionsLevel.AddProperty(prop.mProperty);
break;
}
}
}
aEffectSet.MarkCascadeUpdated();
nsPresContext* presContext = nsContentUtils::GetContextForContent(aElement);
if (!presContext) {
return;
}
// If properties for compositor are newly overridden by !important rules, or
// released from being overridden by !important rules, we need to update
// layers for animations level because it's a trigger to send animations to
// the compositor or pull animations back from the compositor.
if (prevCompositorPropertiesWithImportantRules !=
compositorPropertiesInSet(propertiesWithImportantRules)) {
presContext->EffectCompositor()->
RequestRestyle(aElement, aPseudoType,
EffectCompositor::RestyleType::Layer,
EffectCompositor::CascadeLevel::Animations);
}
// If we have transition properties and if the same propery for animations
// level is newly added or removed, we need to update the transition level
// rule since the it will be added/removed from the rule tree.
nsCSSPropertyIDSet changedPropertiesForAnimationLevel =
prevPropertiesForAnimationsLevel.Xor(propertiesForAnimationsLevel);
nsCSSPropertyIDSet commonProperties =
propertiesForTransitionsLevel.Intersect(
changedPropertiesForAnimationLevel);
if (!commonProperties.IsEmpty()) {
EffectCompositor::RestyleType restyleType =
compositorPropertiesInSet(changedPropertiesForAnimationLevel).none()
? EffectCompositor::RestyleType::Standard
: EffectCompositor::RestyleType::Layer;
presContext->EffectCompositor()->
RequestRestyle(aElement, aPseudoType,
restyleType,
EffectCompositor::CascadeLevel::Transitions);
}
}
/* static */ void
EffectCompositor::SetPerformanceWarning(
const nsIFrame *aFrame,
nsCSSPropertyID aProperty,
const AnimationPerformanceWarning& aWarning)
{
EffectSet* effects = EffectSet::GetEffectSet(aFrame);
if (!effects) {
return;
}
for (KeyframeEffectReadOnly* effect : *effects) {
effect->SetPerformanceWarning(aProperty, aWarning);
}
}
bool
EffectCompositor::PreTraverse(ServoTraversalFlags aFlags)
{
return PreTraverseInSubtree(aFlags, nullptr);
}
bool
EffectCompositor::PreTraverseInSubtree(ServoTraversalFlags aFlags,
Element* aRoot)
{
MOZ_ASSERT(NS_IsMainThread());
MOZ_ASSERT(mPresContext->RestyleManager()->IsServo());
MOZ_ASSERT(!aRoot || nsComputedDOMStyle::GetPresShellForContent(aRoot),
"Traversal root, if provided, should be bound to a display "
"document");
// Convert the root element to the parent element if the root element is
// pseudo since we check each element in mElementsToRestyle is in the subtree
// of the root element later in this function, but for pseudo elements the
// element in mElementsToRestyle is the parent of the pseudo.
if (aRoot &&
(aRoot->IsGeneratedContentContainerForBefore() ||
aRoot->IsGeneratedContentContainerForAfter())) {
aRoot = aRoot->GetParentElement();
}
AutoRestore<bool> guard(mIsInPreTraverse);
mIsInPreTraverse = true;
// We need to force flush all throttled animations if we also have
// non-animation restyles (since we'll want the up-to-date animation style
// when we go to process them so we can trigger transitions correctly), and
// if we are currently flushing all throttled animation restyles.
bool flushThrottledRestyles =
(aRoot && aRoot->HasDirtyDescendantsForServo()) ||
(aFlags & ServoTraversalFlags::FlushThrottledAnimations);
using ElementsToRestyleIterType =
nsDataHashtable<PseudoElementHashEntry, bool>::Iterator;
auto getNeededRestyleTarget = [&](const ElementsToRestyleIterType& aIter)
-> NonOwningAnimationTarget {
NonOwningAnimationTarget returnTarget;
// If aIter.Data() is false, the element only requested a throttled
// (skippable) restyle, so we can skip it if flushThrottledRestyles is not
// true.
if (!flushThrottledRestyles && !aIter.Data()) {
return returnTarget;
}
const NonOwningAnimationTarget& target = aIter.Key();
// Skip elements in documents without a pres shell. Normally we filter out
// such elements in RequestRestyle but it can happen that, after adding
// them to mElementsToRestyle, they are transferred to a different document.
//
// We will drop them from mElementsToRestyle at the end of the next full
// document restyle (at the end of this function) but for consistency with
// how we treat such elements in RequestRestyle, we just ignore them here.
if (!nsComputedDOMStyle::GetPresShellForContent(target.mElement)) {
return returnTarget;
}
// Ignore restyles that aren't in the flattened tree subtree rooted at
// aRoot.
if (aRoot && !nsContentUtils::ContentIsFlattenedTreeDescendantOfForStyle(
target.mElement, aRoot)) {
return returnTarget;
}
returnTarget = target;
return returnTarget;
};
bool foundElementsNeedingRestyle = false;
nsTArray<NonOwningAnimationTarget> elementsWithCascadeUpdates;
for (size_t i = 0; i < kCascadeLevelCount; ++i) {
CascadeLevel cascadeLevel = CascadeLevel(i);
auto& elementSet = mElementsToRestyle[cascadeLevel];
for (auto iter = elementSet.Iter(); !iter.Done(); iter.Next()) {
const NonOwningAnimationTarget& target = getNeededRestyleTarget(iter);
if (!target.mElement) {
continue;
}
EffectSet* effects = EffectSet::GetEffectSet(target.mElement,
target.mPseudoType);
if (!effects || !effects->CascadeNeedsUpdate()) {
continue;
}
elementsWithCascadeUpdates.AppendElement(target);
}
}
for (const NonOwningAnimationTarget& target: elementsWithCascadeUpdates) {
MaybeUpdateCascadeResults(StyleBackendType::Servo,
target.mElement,
target.mPseudoType,
nullptr);
}
elementsWithCascadeUpdates.Clear();
for (size_t i = 0; i < kCascadeLevelCount; ++i) {
CascadeLevel cascadeLevel = CascadeLevel(i);
auto& elementSet = mElementsToRestyle[cascadeLevel];
for (auto iter = elementSet.Iter(); !iter.Done(); iter.Next()) {
const NonOwningAnimationTarget& target = getNeededRestyleTarget(iter);
if (!target.mElement) {
continue;
}
// We need to post restyle hints even if the target is not in EffectSet to
// ensure the final restyling for removed animations.
// We can't call PostRestyleEvent directly here since we are still in the
// middle of the servo traversal.
mPresContext->RestyleManager()->AsServo()->
PostRestyleEventForAnimations(target.mElement,
target.mPseudoType,
cascadeLevel == CascadeLevel::Transitions
? eRestyle_CSSTransitions
: eRestyle_CSSAnimations);
foundElementsNeedingRestyle = true;
EffectSet* effects = EffectSet::GetEffectSet(target.mElement,
target.mPseudoType);
if (!effects) {
// Drop EffectSets that have been destroyed.
iter.Remove();
continue;
}
for (KeyframeEffectReadOnly* effect : *effects) {
effect->GetAnimation()->WillComposeStyle();
}
// Remove the element from the list of elements to restyle since we are
// about to restyle it.
iter.Remove();
}
// If this is a full document restyle, then unconditionally clear
// elementSet in case there are any elements that didn't match above
// because they were moved to a document without a pres shell after
// posting an animation restyle.
if (!aRoot && flushThrottledRestyles) {
elementSet.Clear();
}
}
return foundElementsNeedingRestyle;
}
bool
EffectCompositor::PreTraverse(dom::Element* aElement,
CSSPseudoElementType aPseudoType)
{
MOZ_ASSERT(NS_IsMainThread());
MOZ_ASSERT(mPresContext->RestyleManager()->IsServo());
// If |aElement|'s document does not have a pres shell, e.g. it is document
// without a browsing context such as we might get from an XMLHttpRequest, we
// should not run animations on it.
if (!nsComputedDOMStyle::GetPresShellForContent(aElement)) {
return false;
}
bool found = false;
if (aPseudoType != CSSPseudoElementType::NotPseudo &&
aPseudoType != CSSPseudoElementType::before &&
aPseudoType != CSSPseudoElementType::after) {
return found;
}
AutoRestore<bool> guard(mIsInPreTraverse);
mIsInPreTraverse = true;
PseudoElementHashEntry::KeyType key = { aElement, aPseudoType };
// We need to flush all throttled animation restyles too if we also have
// non-animation restyles (since we'll want the up-to-date animation style
// when we go to process them so we can trigger transitions correctly).
Element* elementToRestyle = GetElementToRestyle(aElement, aPseudoType);
bool flushThrottledRestyles = elementToRestyle &&
elementToRestyle->HasDirtyDescendantsForServo();
for (size_t i = 0; i < kCascadeLevelCount; ++i) {
CascadeLevel cascadeLevel = CascadeLevel(i);
auto& elementSet = mElementsToRestyle[cascadeLevel];
// Skip if we don't have a restyle, or if we only have a throttled
// (skippable) restyle and we're not required to flush throttled restyles.
bool hasUnthrottledRestyle = false;
if (!elementSet.Get(key, &hasUnthrottledRestyle) ||
(!flushThrottledRestyles && !hasUnthrottledRestyle)) {
continue;
}
mPresContext->RestyleManager()->AsServo()->
PostRestyleEventForAnimations(aElement,
aPseudoType,
cascadeLevel == CascadeLevel::Transitions
? eRestyle_CSSTransitions
: eRestyle_CSSAnimations);
EffectSet* effects = EffectSet::GetEffectSet(aElement, aPseudoType);
if (effects) {
MaybeUpdateCascadeResults(StyleBackendType::Servo,
aElement, aPseudoType,
nullptr);
for (KeyframeEffectReadOnly* effect : *effects) {
effect->GetAnimation()->WillComposeStyle();
}
}
elementSet.Remove(key);
found = true;
}
return found;
}
// ---------------------------------------------------------
//
// Nested class: AnimationStyleRuleProcessor
//
// ---------------------------------------------------------
NS_IMPL_ISUPPORTS(EffectCompositor::AnimationStyleRuleProcessor,
nsIStyleRuleProcessor)
nsRestyleHint
EffectCompositor::AnimationStyleRuleProcessor::HasStateDependentStyle(
StateRuleProcessorData* aData)
{
return nsRestyleHint(0);
}
nsRestyleHint
EffectCompositor::AnimationStyleRuleProcessor::HasStateDependentStyle(
PseudoElementStateRuleProcessorData* aData)
{
return nsRestyleHint(0);
}
bool
EffectCompositor::AnimationStyleRuleProcessor::HasDocumentStateDependentStyle(
StateRuleProcessorData* aData)
{
return false;
}
nsRestyleHint
EffectCompositor::AnimationStyleRuleProcessor::HasAttributeDependentStyle(
AttributeRuleProcessorData* aData,
RestyleHintData& aRestyleHintDataResult)
{
return nsRestyleHint(0);
}
bool
EffectCompositor::AnimationStyleRuleProcessor::MediumFeaturesChanged(
nsPresContext* aPresContext)
{
return false;
}
void
EffectCompositor::AnimationStyleRuleProcessor::RulesMatching(
ElementRuleProcessorData* aData)
{
nsIStyleRule *rule =
mCompositor->GetAnimationRule(aData->mElement,
CSSPseudoElementType::NotPseudo,
mCascadeLevel,
nullptr);
if (rule) {
aData->mRuleWalker->Forward(rule);
aData->mRuleWalker->CurrentNode()->SetIsAnimationRule();
}
}
void
EffectCompositor::AnimationStyleRuleProcessor::RulesMatching(
PseudoElementRuleProcessorData* aData)
{
if (aData->mPseudoType != CSSPseudoElementType::before &&
aData->mPseudoType != CSSPseudoElementType::after) {
return;
}
nsIStyleRule *rule =
mCompositor->GetAnimationRule(aData->mElement,
aData->mPseudoType,
mCascadeLevel,
nullptr);
if (rule) {
aData->mRuleWalker->Forward(rule);
aData->mRuleWalker->CurrentNode()->SetIsAnimationRule();
}
}
void
EffectCompositor::AnimationStyleRuleProcessor::RulesMatching(
AnonBoxRuleProcessorData* aData)
{
}
#ifdef MOZ_XUL
void
EffectCompositor::AnimationStyleRuleProcessor::RulesMatching(
XULTreeRuleProcessorData* aData)
{
}
#endif
size_t
EffectCompositor::AnimationStyleRuleProcessor::SizeOfExcludingThis(
MallocSizeOf aMallocSizeOf) const
{
return 0;
}
size_t
EffectCompositor::AnimationStyleRuleProcessor::SizeOfIncludingThis(
MallocSizeOf aMallocSizeOf) const
{
return aMallocSizeOf(this) + SizeOfExcludingThis(aMallocSizeOf);
}
template
void
EffectCompositor::UpdateEffectProperties(
GeckoStyleContext* aStyleContext,
Element* aElement,
CSSPseudoElementType aPseudoType);
template
void
EffectCompositor::UpdateEffectProperties(
const ServoStyleContext* aStyleContext,
Element* aElement,
CSSPseudoElementType aPseudoType);
} // namespace mozilla