Maybe<NonOwningAnimationTarget>
nsNodeUtils::GetTargetForAnimation(const Animation* aAnimation)
{
AnimationEffectReadOnly* effect = aAnimation->GetEffect();
if (!effect || !effect->AsKeyframeEffect()) {
return Nothing();
}
return effect->AsKeyframeEffect()->GetTarget();
}
static void
UpdateOldAnimationPropertiesWithNew(
CSSAnimation& aOld,
TimingParams& aNewTiming,
nsTArray<Keyframe>& aNewKeyframes,
bool aNewIsStylePaused,
nsStyleContext* aStyleContext)
{
bool animationChanged = false;
// Update the old from the new so we can keep the original object
// identity (and any expando properties attached to it).
if (aOld.GetEffect()) {
AnimationEffectReadOnly* oldEffect = aOld.GetEffect();
animationChanged = oldEffect->SpecifiedTiming() != aNewTiming;
oldEffect->SetSpecifiedTiming(aNewTiming);
KeyframeEffectReadOnly* oldKeyframeEffect = oldEffect->AsKeyframeEffect();
if (oldKeyframeEffect) {
oldKeyframeEffect->SetKeyframes(Move(aNewKeyframes), aStyleContext);
}
}
// Handle changes in play state. If the animation is idle, however,
// changes to animation-play-state should *not* restart it.
if (aOld.PlayState() != AnimationPlayState::Idle) {
// CSSAnimation takes care of override behavior so that,
// for example, if the author has called pause(), that will
// override the animation-play-state.
// (We should check aNew->IsStylePaused() but that requires
// downcasting to CSSAnimation and we happen to know that
// aNew will only ever be paused by calling PauseFromStyle
// making IsPausedOrPausing synonymous in this case.)
if (!aOld.IsStylePaused() && aNewIsStylePaused) {
aOld.PauseFromStyle();
animationChanged = true;
} else if (aOld.IsStylePaused() && !aNewIsStylePaused) {
aOld.PlayFromStyle();
animationChanged = true;
}
}
// Updating the effect timing above might already have caused the
// animation to become irrelevant so only add a changed record if
// the animation is still relevant.
if (animationChanged && aOld.IsRelevant()) {
nsNodeUtils::AnimationChanged(&aOld);
}
}