gecko/layout/style/AnimationCommon.cpp
Brian Birtles 6315d9d2bc Bug 1109390 part 18 - Rename AnimationPlayer::IsRunning to IsPlaying and reuse IsInPlay definition; r=jwatt
This patch renames the confusing IsRunning method since IsRunning() is *not*
the same as (PlayState() == AnimationPlayState::Running). It also removes
the old definition to make better re-use of PlayState() and IsInPlay().
2015-03-27 18:01:00 +09:00

875 lines
26 KiB
C++

/* vim: set shiftwidth=2 tabstop=8 autoindent cindent expandtab: */
/* 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 "AnimationCommon.h"
#include "nsTransitionManager.h"
#include "nsAnimationManager.h"
#include "ActiveLayerTracker.h"
#include "gfxPlatform.h"
#include "nsRuleData.h"
#include "nsCSSPropertySet.h"
#include "nsCSSValue.h"
#include "nsCycleCollectionParticipant.h"
#include "nsStyleContext.h"
#include "nsIFrame.h"
#include "nsLayoutUtils.h"
#include "mozilla/LookAndFeel.h"
#include "Layers.h"
#include "FrameLayerBuilder.h"
#include "nsDisplayList.h"
#include "mozilla/MemoryReporting.h"
#include "RestyleManager.h"
#include "nsRuleProcessorData.h"
#include "nsStyleSet.h"
#include "nsStyleChangeList.h"
using mozilla::layers::Layer;
using mozilla::dom::AnimationPlayer;
using mozilla::dom::Animation;
namespace mozilla {
/* static */ bool
IsGeometricProperty(nsCSSProperty aProperty)
{
switch (aProperty) {
case eCSSProperty_bottom:
case eCSSProperty_height:
case eCSSProperty_left:
case eCSSProperty_right:
case eCSSProperty_top:
case eCSSProperty_width:
return true;
default:
return false;
}
}
namespace css {
CommonAnimationManager::CommonAnimationManager(nsPresContext *aPresContext)
: mPresContext(aPresContext)
, mIsObservingRefreshDriver(false)
{
PR_INIT_CLIST(&mElementCollections);
}
CommonAnimationManager::~CommonAnimationManager()
{
MOZ_ASSERT(!mPresContext, "Disconnect should have been called");
}
void
CommonAnimationManager::Disconnect()
{
// Content nodes might outlive the transition or animation manager.
RemoveAllElementCollections();
mPresContext = nullptr;
}
void
CommonAnimationManager::AddElementCollection(AnimationPlayerCollection*
aCollection)
{
if (!mIsObservingRefreshDriver) {
NS_ASSERTION(aCollection->mNeedsRefreshes,
"Added data which doesn't need refreshing?");
// We need to observe the refresh driver.
mPresContext->RefreshDriver()->AddRefreshObserver(this, Flush_Style);
mIsObservingRefreshDriver = true;
}
PR_INSERT_BEFORE(aCollection, &mElementCollections);
}
void
CommonAnimationManager::RemoveAllElementCollections()
{
while (!PR_CLIST_IS_EMPTY(&mElementCollections)) {
AnimationPlayerCollection* head =
static_cast<AnimationPlayerCollection*>(
PR_LIST_HEAD(&mElementCollections));
head->Destroy();
}
}
void
CommonAnimationManager::CheckNeedsRefresh()
{
for (PRCList *l = PR_LIST_HEAD(&mElementCollections);
l != &mElementCollections;
l = PR_NEXT_LINK(l)) {
if (static_cast<AnimationPlayerCollection*>(l)->mNeedsRefreshes) {
if (!mIsObservingRefreshDriver) {
mPresContext->RefreshDriver()->AddRefreshObserver(this, Flush_Style);
mIsObservingRefreshDriver = true;
}
return;
}
}
if (mIsObservingRefreshDriver) {
mIsObservingRefreshDriver = false;
mPresContext->RefreshDriver()->RemoveRefreshObserver(this, Flush_Style);
}
}
AnimationPlayerCollection*
CommonAnimationManager::GetAnimationsForCompositor(nsIContent* aContent,
nsIAtom* aElementProperty,
nsCSSProperty aProperty)
{
if (!aContent->MayHaveAnimations())
return nullptr;
AnimationPlayerCollection* collection =
static_cast<AnimationPlayerCollection*>(
aContent->GetProperty(aElementProperty));
if (!collection ||
!collection->HasAnimationOfProperty(aProperty) ||
!collection->CanPerformOnCompositorThread(
AnimationPlayerCollection::CanAnimate_AllowPartial)) {
return nullptr;
}
// This animation can be done on the compositor.
// Mark the frame as active, in case we are able to throttle this animation.
nsIFrame* frame = nsLayoutUtils::GetStyleFrame(collection->mElement);
if (frame) {
const auto& info = sLayerAnimationInfo;
for (size_t i = 0; i < ArrayLength(info); i++) {
if (aProperty == info[i].mProperty) {
ActiveLayerTracker::NotifyAnimated(frame, aProperty);
break;
}
}
}
return collection;
}
/*
* nsISupports implementation
*/
NS_IMPL_ISUPPORTS(CommonAnimationManager, nsIStyleRuleProcessor)
nsRestyleHint
CommonAnimationManager::HasStateDependentStyle(StateRuleProcessorData* aData)
{
return nsRestyleHint(0);
}
nsRestyleHint
CommonAnimationManager::HasStateDependentStyle(PseudoElementStateRuleProcessorData* aData)
{
return nsRestyleHint(0);
}
bool
CommonAnimationManager::HasDocumentStateDependentStyle(StateRuleProcessorData* aData)
{
return false;
}
nsRestyleHint
CommonAnimationManager::HasAttributeDependentStyle(AttributeRuleProcessorData* aData)
{
return nsRestyleHint(0);
}
/* virtual */ bool
CommonAnimationManager::MediumFeaturesChanged(nsPresContext* aPresContext)
{
return false;
}
/* virtual */ void
CommonAnimationManager::RulesMatching(ElementRuleProcessorData* aData)
{
MOZ_ASSERT(aData->mPresContext == mPresContext,
"pres context mismatch");
nsIStyleRule *rule =
GetAnimationRule(aData->mElement,
nsCSSPseudoElements::ePseudo_NotPseudoElement);
if (rule) {
aData->mRuleWalker->Forward(rule);
}
}
/* virtual */ void
CommonAnimationManager::RulesMatching(PseudoElementRuleProcessorData* aData)
{
MOZ_ASSERT(aData->mPresContext == mPresContext,
"pres context mismatch");
if (aData->mPseudoType != nsCSSPseudoElements::ePseudo_before &&
aData->mPseudoType != nsCSSPseudoElements::ePseudo_after) {
return;
}
// FIXME: Do we really want to be the only thing keeping a
// pseudo-element alive? I *think* the non-animation restyle should
// handle that, but should add a test.
nsIStyleRule *rule = GetAnimationRule(aData->mElement, aData->mPseudoType);
if (rule) {
aData->mRuleWalker->Forward(rule);
}
}
/* virtual */ void
CommonAnimationManager::RulesMatching(AnonBoxRuleProcessorData* aData)
{
}
#ifdef MOZ_XUL
/* virtual */ void
CommonAnimationManager::RulesMatching(XULTreeRuleProcessorData* aData)
{
}
#endif
/* virtual */ size_t
CommonAnimationManager::SizeOfExcludingThis(mozilla::MallocSizeOf aMallocSizeOf) const
{
// Measurement of the following members may be added later if DMD finds it is
// worthwhile:
// - mElementCollections
//
// The following members are not measured
// - mPresContext, because it's non-owning
return 0;
}
/* virtual */ size_t
CommonAnimationManager::SizeOfIncludingThis(mozilla::MallocSizeOf aMallocSizeOf) const
{
return aMallocSizeOf(this) + SizeOfExcludingThis(aMallocSizeOf);
}
void
CommonAnimationManager::AddStyleUpdatesTo(RestyleTracker& aTracker)
{
TimeStamp now = mPresContext->RefreshDriver()->MostRecentRefresh();
PRCList* next = PR_LIST_HEAD(&mElementCollections);
while (next != &mElementCollections) {
AnimationPlayerCollection* collection =
static_cast<AnimationPlayerCollection*>(next);
next = PR_NEXT_LINK(next);
collection->EnsureStyleRuleFor(now, EnsureStyleRule_IsNotThrottled);
dom::Element* elementToRestyle = collection->GetElementToRestyle();
if (elementToRestyle) {
nsRestyleHint rshint = collection->IsForTransitions()
? eRestyle_CSSTransitions : eRestyle_CSSAnimations;
aTracker.AddPendingRestyle(elementToRestyle, rshint, nsChangeHint(0));
}
}
}
void
CommonAnimationManager::NotifyCollectionUpdated(AnimationPlayerCollection&
aCollection)
{
CheckNeedsRefresh();
mPresContext->ClearLastStyleUpdateForAllAnimations();
mPresContext->RestyleManager()->IncrementAnimationGeneration();
aCollection.UpdateAnimationGeneration(mPresContext);
aCollection.PostRestyleForAnimation(mPresContext);
}
/* static */ bool
CommonAnimationManager::ExtractComputedValueForTransition(
nsCSSProperty aProperty,
nsStyleContext* aStyleContext,
StyleAnimationValue& aComputedValue)
{
bool result = StyleAnimationValue::ExtractComputedValue(aProperty,
aStyleContext,
aComputedValue);
if (aProperty == eCSSProperty_visibility) {
MOZ_ASSERT(aComputedValue.GetUnit() ==
StyleAnimationValue::eUnit_Enumerated,
"unexpected unit");
aComputedValue.SetIntValue(aComputedValue.GetIntValue(),
StyleAnimationValue::eUnit_Visibility);
}
return result;
}
AnimationPlayerCollection*
CommonAnimationManager::GetAnimationPlayers(dom::Element *aElement,
nsCSSPseudoElements::Type aPseudoType,
bool aCreateIfNeeded)
{
if (!aCreateIfNeeded && PR_CLIST_IS_EMPTY(&mElementCollections)) {
// Early return for the most common case.
return nullptr;
}
nsIAtom *propName;
if (aPseudoType == nsCSSPseudoElements::ePseudo_NotPseudoElement) {
propName = GetAnimationsAtom();
} else if (aPseudoType == nsCSSPseudoElements::ePseudo_before) {
propName = GetAnimationsBeforeAtom();
} else if (aPseudoType == nsCSSPseudoElements::ePseudo_after) {
propName = GetAnimationsAfterAtom();
} else {
NS_ASSERTION(!aCreateIfNeeded,
"should never try to create transitions for pseudo "
"other than :before or :after");
return nullptr;
}
AnimationPlayerCollection* collection =
static_cast<AnimationPlayerCollection*>(aElement->GetProperty(propName));
if (!collection && aCreateIfNeeded) {
// FIXME: Consider arena-allocating?
collection =
new AnimationPlayerCollection(aElement, propName, this);
nsresult rv =
aElement->SetProperty(propName, collection,
&AnimationPlayerCollection::PropertyDtor, false);
if (NS_FAILED(rv)) {
NS_WARNING("SetProperty failed");
delete collection;
return nullptr;
}
if (propName == nsGkAtoms::animationsProperty ||
propName == nsGkAtoms::transitionsProperty) {
aElement->SetMayHaveAnimations();
}
AddElementCollection(collection);
}
return collection;
}
nsIStyleRule*
CommonAnimationManager::GetAnimationRule(mozilla::dom::Element* aElement,
nsCSSPseudoElements::Type aPseudoType)
{
MOZ_ASSERT(
aPseudoType == nsCSSPseudoElements::ePseudo_NotPseudoElement ||
aPseudoType == nsCSSPseudoElements::ePseudo_before ||
aPseudoType == nsCSSPseudoElements::ePseudo_after,
"forbidden pseudo type");
if (!mPresContext->IsDynamic()) {
// For print or print preview, ignore animations.
return nullptr;
}
AnimationPlayerCollection* collection =
GetAnimationPlayers(aElement, aPseudoType, false);
if (!collection) {
return nullptr;
}
RestyleManager* restyleManager = mPresContext->RestyleManager();
if (restyleManager->SkipAnimationRules()) {
return nullptr;
}
// Animations should already be refreshed, but transitions may not be.
// Note that this is temporary, we would like both animations and transitions
// to both be refreshed by this point.
if (IsAnimationManager()) {
NS_WARN_IF_FALSE(!collection->mNeedsRefreshes ||
collection->mStyleRuleRefreshTime ==
mPresContext->RefreshDriver()->MostRecentRefresh(),
"should already have refreshed style rule");
} else {
// FIXME: Remove this assignment. See bug 1061364.
collection->mNeedsRefreshes = true;
collection->EnsureStyleRuleFor(
mPresContext->RefreshDriver()->MostRecentRefresh(),
EnsureStyleRule_IsNotThrottled);
}
return collection->mStyleRule;
}
/* static */ const CommonAnimationManager::LayerAnimationRecord
CommonAnimationManager::sLayerAnimationInfo[] =
{ { eCSSProperty_transform,
nsDisplayItem::TYPE_TRANSFORM,
nsChangeHint_UpdateTransformLayer },
{ eCSSProperty_opacity,
nsDisplayItem::TYPE_OPACITY,
nsChangeHint_UpdateOpacityLayer } };
NS_IMPL_ISUPPORTS(AnimValuesStyleRule, nsIStyleRule)
/* virtual */ void
AnimValuesStyleRule::MapRuleInfoInto(nsRuleData* aRuleData)
{
nsStyleContext *contextParent = aRuleData->mStyleContext->GetParent();
if (contextParent && contextParent->HasPseudoElementData()) {
// Don't apply transitions or animations to things inside of
// pseudo-elements.
// FIXME (Bug 522599): Add tests for this.
return;
}
for (uint32_t i = 0, i_end = mPropertyValuePairs.Length(); i < i_end; ++i) {
PropertyValuePair &cv = mPropertyValuePairs[i];
if (aRuleData->mSIDs & nsCachedStyleData::GetBitForSID(
nsCSSProps::kSIDTable[cv.mProperty]))
{
nsCSSValue *prop = aRuleData->ValueFor(cv.mProperty);
if (prop->GetUnit() == eCSSUnit_Null) {
#ifdef DEBUG
bool ok =
#endif
StyleAnimationValue::UncomputeValue(cv.mProperty, cv.mValue, *prop);
MOZ_ASSERT(ok, "could not store computed value");
}
}
}
}
#ifdef DEBUG
/* virtual */ void
AnimValuesStyleRule::List(FILE* out, int32_t aIndent) const
{
nsAutoCString str;
for (int32_t index = aIndent; --index >= 0; ) {
str.AppendLiteral(" ");
}
str.AppendLiteral("[anim values] { ");
for (uint32_t i = 0, i_end = mPropertyValuePairs.Length(); i < i_end; ++i) {
const PropertyValuePair &pair = mPropertyValuePairs[i];
str.Append(nsCSSProps::GetStringValue(pair.mProperty));
str.AppendLiteral(": ");
nsAutoString value;
StyleAnimationValue::UncomputeValue(pair.mProperty, pair.mValue, value);
AppendUTF16toUTF8(value, str);
str.AppendLiteral("; ");
}
str.AppendLiteral("}\n");
fprintf_stderr(out, "%s", str.get());
}
#endif
} /* end sub-namespace css */
bool
AnimationPlayerCollection::CanAnimatePropertyOnCompositor(
const dom::Element *aElement,
nsCSSProperty aProperty,
CanAnimateFlags aFlags)
{
bool shouldLog = nsLayoutUtils::IsAnimationLoggingEnabled();
if (!gfxPlatform::OffMainThreadCompositingEnabled()) {
if (shouldLog) {
nsCString message;
message.AppendLiteral("Performance warning: Compositor disabled");
LogAsyncAnimationFailure(message);
}
return false;
}
nsIFrame* frame = nsLayoutUtils::GetStyleFrame(aElement);
if (IsGeometricProperty(aProperty)) {
if (shouldLog) {
nsCString message;
message.AppendLiteral("Performance warning: Async animation of geometric property '");
message.Append(nsCSSProps::GetStringValue(aProperty));
message.AppendLiteral("' is disabled");
LogAsyncAnimationFailure(message, aElement);
}
return false;
}
if (aProperty == eCSSProperty_transform) {
if (frame->Preserves3D() &&
frame->Preserves3DChildren()) {
if (shouldLog) {
nsCString message;
message.AppendLiteral("Gecko bug: Async animation of 'preserve-3d' transforms is not supported. See bug 779598");
LogAsyncAnimationFailure(message, aElement);
}
return false;
}
if (frame->IsSVGTransformed()) {
if (shouldLog) {
nsCString message;
message.AppendLiteral("Gecko bug: Async 'transform' animations of frames with SVG transforms is not supported. See bug 779599");
LogAsyncAnimationFailure(message, aElement);
}
return false;
}
if (aFlags & CanAnimate_HasGeometricProperty) {
if (shouldLog) {
nsCString message;
message.AppendLiteral("Performance warning: Async animation of 'transform' not possible due to presence of geometric properties");
LogAsyncAnimationFailure(message, aElement);
}
return false;
}
}
bool enabled = nsLayoutUtils::AreAsyncAnimationsEnabled();
if (!enabled && shouldLog) {
nsCString message;
message.AppendLiteral("Performance warning: Async animations are disabled");
LogAsyncAnimationFailure(message);
}
bool propertyAllowed = (aProperty == eCSSProperty_transform) ||
(aProperty == eCSSProperty_opacity) ||
(aFlags & CanAnimate_AllowPartial);
return enabled && propertyAllowed;
}
/* static */ bool
AnimationPlayerCollection::IsCompositorAnimationDisabledForFrame(
nsIFrame* aFrame)
{
void* prop = aFrame->Properties().Get(nsIFrame::RefusedAsyncAnimation());
return bool(reinterpret_cast<intptr_t>(prop));
}
bool
AnimationPlayerCollection::CanPerformOnCompositorThread(
CanAnimateFlags aFlags) const
{
nsIFrame* frame = nsLayoutUtils::GetStyleFrame(mElement);
if (!frame) {
return false;
}
if (mElementProperty != nsGkAtoms::transitionsProperty &&
mElementProperty != nsGkAtoms::animationsProperty) {
if (nsLayoutUtils::IsAnimationLoggingEnabled()) {
nsCString message;
message.AppendLiteral("Gecko bug: Async animation of pseudoelements"
" not supported. See bug 771367 (");
message.Append(nsAtomCString(mElementProperty));
message.Append(")");
LogAsyncAnimationFailure(message, mElement);
}
return false;
}
for (size_t playerIdx = mPlayers.Length(); playerIdx-- != 0; ) {
const AnimationPlayer* player = mPlayers[playerIdx];
if (!player->IsPlaying()) {
continue;
}
const Animation* anim = player->GetSource();
MOZ_ASSERT(anim, "A playing player should have a source animation");
for (size_t propIdx = 0, propEnd = anim->Properties().Length();
propIdx != propEnd; ++propIdx) {
if (IsGeometricProperty(anim->Properties()[propIdx].mProperty)) {
aFlags = CanAnimateFlags(aFlags | CanAnimate_HasGeometricProperty);
break;
}
}
}
bool existsProperty = false;
for (size_t playerIdx = mPlayers.Length(); playerIdx-- != 0; ) {
const AnimationPlayer* player = mPlayers[playerIdx];
if (!player->IsPlaying()) {
continue;
}
const Animation* anim = player->GetSource();
MOZ_ASSERT(anim, "A playing player should have a source animation");
existsProperty = existsProperty || anim->Properties().Length() > 0;
for (size_t propIdx = 0, propEnd = anim->Properties().Length();
propIdx != propEnd; ++propIdx) {
const AnimationProperty& prop = anim->Properties()[propIdx];
if (!CanAnimatePropertyOnCompositor(mElement,
prop.mProperty,
aFlags) ||
IsCompositorAnimationDisabledForFrame(frame)) {
return false;
}
}
}
// No properties to animate
if (!existsProperty) {
return false;
}
return true;
}
bool
AnimationPlayerCollection::HasAnimationOfProperty(
nsCSSProperty aProperty) const
{
for (size_t playerIdx = mPlayers.Length(); playerIdx-- != 0; ) {
const Animation* anim = mPlayers[playerIdx]->GetSource();
if (anim && anim->HasAnimationOfProperty(aProperty) &&
!anim->IsFinishedTransition()) {
return true;
}
}
return false;
}
mozilla::dom::Element*
AnimationPlayerCollection::GetElementToRestyle() const
{
if (IsForElement()) {
return mElement;
}
nsIFrame* primaryFrame = mElement->GetPrimaryFrame();
if (!primaryFrame) {
return nullptr;
}
nsIFrame* pseudoFrame;
if (IsForBeforePseudo()) {
pseudoFrame = nsLayoutUtils::GetBeforeFrame(primaryFrame);
} else if (IsForAfterPseudo()) {
pseudoFrame = nsLayoutUtils::GetAfterFrame(primaryFrame);
} else {
MOZ_ASSERT(false, "unknown mElementProperty");
return nullptr;
}
if (!pseudoFrame) {
return nullptr;
}
return pseudoFrame->GetContent()->AsElement();
}
void
AnimationPlayerCollection::NotifyPlayerUpdated()
{
// On the next flush, force us to update the style rule
mNeedsRefreshes = true;
mStyleRuleRefreshTime = TimeStamp();
mManager->NotifyCollectionUpdated(*this);
}
/* static */ void
AnimationPlayerCollection::LogAsyncAnimationFailure(nsCString& aMessage,
const nsIContent* aContent)
{
if (aContent) {
aMessage.AppendLiteral(" [");
aMessage.Append(nsAtomCString(aContent->NodeInfo()->NameAtom()));
nsIAtom* id = aContent->GetID();
if (id) {
aMessage.AppendLiteral(" with id '");
aMessage.Append(nsAtomCString(aContent->GetID()));
aMessage.Append('\'');
}
aMessage.Append(']');
}
aMessage.Append('\n');
printf_stderr("%s", aMessage.get());
}
/*static*/ void
AnimationPlayerCollection::PropertyDtor(void *aObject, nsIAtom *aPropertyName,
void *aPropertyValue, void *aData)
{
AnimationPlayerCollection* collection =
static_cast<AnimationPlayerCollection*>(aPropertyValue);
#ifdef DEBUG
MOZ_ASSERT(!collection->mCalledPropertyDtor, "can't call dtor twice");
collection->mCalledPropertyDtor = true;
#endif
delete collection;
}
void
AnimationPlayerCollection::Tick()
{
for (size_t playerIdx = 0, playerEnd = mPlayers.Length();
playerIdx != playerEnd; playerIdx++) {
mPlayers[playerIdx]->Tick();
}
}
void
AnimationPlayerCollection::EnsureStyleRuleFor(TimeStamp aRefreshTime,
EnsureStyleRuleFlags aFlags)
{
if (!mNeedsRefreshes) {
mStyleRuleRefreshTime = aRefreshTime;
return;
}
// If we're performing animations on the compositor thread, then we can skip
// most of the work in this method. But even if we are throttled, then we
// have to do the work if an animation is ending in order to get correct end
// of animation behavior (the styles of the animation disappear, or the fill
// mode behavior). CanThrottle returns false for any finishing animations
// so we can force style recalculation in that case.
if (aFlags == EnsureStyleRule_IsThrottled) {
for (size_t playerIdx = mPlayers.Length(); playerIdx-- != 0; ) {
if (!mPlayers[playerIdx]->CanThrottle()) {
aFlags = EnsureStyleRule_IsNotThrottled;
break;
}
}
}
if (aFlags == EnsureStyleRule_IsThrottled) {
return;
}
// mStyleRule may be null and valid, if we have no style to apply.
if (mStyleRuleRefreshTime.IsNull() ||
mStyleRuleRefreshTime != aRefreshTime) {
mStyleRuleRefreshTime = aRefreshTime;
mStyleRule = nullptr;
// We'll set mNeedsRefreshes to true below in all cases where we need them.
mNeedsRefreshes = false;
// If multiple animations specify behavior for the same property the
// animation which occurs last in the value of animation-name wins.
// As a result, we iterate from last animation to first and, if a
// property has already been set, we don't leave it.
nsCSSPropertySet properties;
for (size_t playerIdx = mPlayers.Length(); playerIdx-- != 0; ) {
mPlayers[playerIdx]->ComposeStyle(mStyleRule, properties,
mNeedsRefreshes);
}
}
mManager->CheckNeedsRefresh();
// If one of our animations just started or stopped filling, we need
// to notify the transition manager. This does the notification a bit
// more than necessary, but it's easier than doing it exactly.
if (mManager->IsAnimationManager()) {
mManager->mPresContext->TransitionManager()->
UpdateCascadeResultsWithAnimations(this);
}
}
bool
AnimationPlayerCollection::CanThrottleTransformChanges(TimeStamp aTime)
{
if (!nsLayoutUtils::AreAsyncAnimationsEnabled()) {
return false;
}
// If we know that the animation cannot cause overflow,
// we can just disable flushes for this animation.
// If we don't show scrollbars, we don't care about overflow.
if (LookAndFeel::GetInt(LookAndFeel::eIntID_ShowHideScrollbars) == 0) {
return true;
}
// If this animation can cause overflow, we can throttle some of the ticks.
if (!mStyleRuleRefreshTime.IsNull() &&
(aTime - mStyleRuleRefreshTime) < TimeDuration::FromMilliseconds(200)) {
return true;
}
// If the nearest scrollable ancestor has overflow:hidden,
// we don't care about overflow.
nsIScrollableFrame* scrollable = nsLayoutUtils::GetNearestScrollableFrame(
nsLayoutUtils::GetStyleFrame(mElement));
if (!scrollable) {
return true;
}
ScrollbarStyles ss = scrollable->GetScrollbarStyles();
if (ss.mVertical == NS_STYLE_OVERFLOW_HIDDEN &&
ss.mHorizontal == NS_STYLE_OVERFLOW_HIDDEN &&
scrollable->GetLogicalScrollPosition() == nsPoint(0, 0)) {
return true;
}
return false;
}
bool
AnimationPlayerCollection::CanThrottleAnimation(TimeStamp aTime)
{
nsIFrame* frame = nsLayoutUtils::GetStyleFrame(mElement);
if (!frame) {
return false;
}
const auto& info = css::CommonAnimationManager::sLayerAnimationInfo;
for (size_t i = 0; i < ArrayLength(info); i++) {
auto record = info[i];
if (!HasAnimationOfProperty(record.mProperty)) {
continue;
}
Layer* layer = FrameLayerBuilder::GetDedicatedLayer(
frame, record.mLayerType);
if (!layer || mAnimationGeneration > layer->GetAnimationGeneration()) {
return false;
}
if (record.mProperty == eCSSProperty_transform &&
!CanThrottleTransformChanges(aTime)) {
return false;
}
}
return true;
}
void
AnimationPlayerCollection::UpdateAnimationGeneration(
nsPresContext* aPresContext)
{
mAnimationGeneration =
aPresContext->RestyleManager()->GetAnimationGeneration();
}
void
AnimationPlayerCollection::UpdateCheckGeneration(
nsPresContext* aPresContext)
{
mCheckGeneration =
aPresContext->RestyleManager()->GetAnimationGeneration();
}
bool
AnimationPlayerCollection::HasCurrentAnimations() const
{
for (size_t playerIdx = mPlayers.Length(); playerIdx-- != 0; ) {
if (mPlayers[playerIdx]->HasCurrentSource()) {
return true;
}
}
return false;
}
bool
AnimationPlayerCollection::HasCurrentAnimationsForProperty(nsCSSProperty
aProperty) const
{
for (size_t playerIdx = mPlayers.Length(); playerIdx-- != 0; ) {
const AnimationPlayer& player = *mPlayers[playerIdx];
const Animation* anim = player.GetSource();
if (anim &&
anim->IsCurrent(player) &&
anim->HasAnimationOfProperty(aProperty)) {
return true;
}
}
return false;
}
}