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();
// We don't need to reset the mWinsInCascade member since it will be updated
// when we later associate with a different target (and until that time this
// flag is not used).
RequestRestyle(EffectCompositor::RestyleType::Layer);
nsAutoAnimationMutationBatch mb(mTarget->mElement->OwnerDoc());
if (mAnimation) {
nsNodeUtils::AnimationRemoved(mAnimation);
}
}
mTarget = newTarget;
if (mTarget) {
UpdateTargetRegistration();
RefPtr<nsStyleContext> styleContext = GetTargetStyleContext();
if (styleContext) {
UpdateProperties(styleContext);
} else if (mEffectOptions.mSpacingMode == SpacingMode::paced) {
KeyframeUtils::ApplyDistributeSpacing(mKeyframes);
}
MaybeUpdateFrameForCompositor();
RequestRestyle(EffectCompositor::RestyleType::Layer);
nsAutoAnimationMutationBatch mb(mTarget->mElement->OwnerDoc());
if (mAnimation) {
nsNodeUtils::AnimationAdded(mAnimation);
}
} else if (mEffectOptions.mSpacingMode == SpacingMode::paced) {
// New target is null, so fall back to distribute spacing.
KeyframeUtils::ApplyDistributeSpacing(mKeyframes);
}
}
void
KeyframeEffect::NotifySpecifiedTimingUpdated()
{
// Use the same document for a pseudo element and its parent element.
// Use nullptr if we don't have mTarget, so disable the mutation batch.
nsAutoAnimationMutationBatch mb(mTarget ? mTarget->mElement->OwnerDoc()
: nullptr);
if (mAnimation) {
mAnimation->NotifyEffectTimingUpdated();
if (mAnimation->IsRelevant()) {
nsNodeUtils::AnimationChanged(mAnimation);
}
RequestRestyle(EffectCompositor::RestyleType::Layer);
}
}
void
KeyframeEffectReadOnly::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();
if (mAnimation) {
MarkCascadeNeedsUpdate();
}
}
void
KeyframeEffectReadOnly::UpdateProperties(nsStyleContext* aStyleContext)
{
MOZ_ASSERT(aStyleContext);
nsTArray<AnimationProperty> properties = BuildProperties(aStyleContext);
if (mProperties == properties) {
return;
}
// Preserve the state of the mIsRunningOnCompositor flag.
nsCSSPropertyIDSet runningOnCompositorProperties;
for (const AnimationProperty& property : mProperties) {
if (property.mIsRunningOnCompositor) {
runningOnCompositorProperties.AddProperty(property.mProperty);
}
}
mProperties = Move(properties);
for (AnimationProperty& property : mProperties) {
property.mIsRunningOnCompositor =
runningOnCompositorProperties.HasProperty(property.mProperty);
}
// FIXME (bug 1303235): Do this for Servo too
if (aStyleContext->PresContext()->StyleSet()->IsGecko()) {
CalculateCumulativeChangeHint(aStyleContext);
}
MarkCascadeNeedsUpdate();
RequestRestyle(EffectCompositor::RestyleType::Layer);
}
void
KeyframeEffectReadOnly::UpdateProperties(nsStyleContext* aStyleContext)
{
MOZ_ASSERT(aStyleContext);
nsTArray<AnimationProperty> properties;
if (mTarget) {
// 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);
nsTArray<ComputedKeyframeValues> computedValues =
KeyframeUtils::GetComputedKeyframeValues(keyframesCopy,
mTarget->mElement,
aStyleContext);
if (mEffectOptions.mSpacingMode == SpacingMode::paced) {
KeyframeUtils::ApplySpacing(keyframesCopy, SpacingMode::paced,
mEffectOptions.mPacedProperty,
computedValues);
}
properties =
KeyframeUtils::GetAnimationPropertiesFromKeyframes(keyframesCopy,
computedValues,
aStyleContext);
#ifdef DEBUG
MOZ_ASSERT(SpecifiedKeyframeArraysAreEqual(mKeyframes, keyframesCopy),
"Apart from the computed offset members, the keyframes array"
" should not be modified");
#endif
mKeyframes.SwapElements(keyframesCopy);
}
if (mProperties == properties) {
return;
}
// Preserve the state of mWinsInCascade and mIsRunningOnCompositor flags.
nsCSSPropertyIDSet winningInCascadeProperties;
nsCSSPropertyIDSet runningOnCompositorProperties;
for (const AnimationProperty& property : mProperties) {
if (property.mWinsInCascade) {
winningInCascadeProperties.AddProperty(property.mProperty);
}
if (property.mIsRunningOnCompositor) {
runningOnCompositorProperties.AddProperty(property.mProperty);
}
}
mProperties = Move(properties);
for (AnimationProperty& property : mProperties) {
property.mWinsInCascade =
winningInCascadeProperties.HasProperty(property.mProperty);
property.mIsRunningOnCompositor =
runningOnCompositorProperties.HasProperty(property.mProperty);
}
CalculateCumulativeChangeHint(aStyleContext);
MarkCascadeNeedsUpdate();
RequestRestyle(EffectCompositor::RestyleType::Layer);
}
