void DocumentTimeline::RemoveAnimation(Animation* aAnimation) {
AnimationTimeline::RemoveAnimation(aAnimation);
if (mIsObservingRefreshDriver && mAnimations.IsEmpty()) {
UnregisterFromRefreshDriver();
}
}
void
DocumentTimeline::WillRefresh(mozilla::TimeStamp aTime)
{
MOZ_ASSERT(mIsObservingRefreshDriver);
MOZ_ASSERT(GetRefreshDriver(),
"Should be able to reach refresh driver from within WillRefresh");
bool needsTicks = false;
nsTArray<Animation*> animationsToRemove(mAnimations.Count());
nsAutoAnimationMutationBatch mb(mDocument);
for (Animation* animation = mAnimationOrder.getFirst(); animation;
animation = animation->getNext()) {
// Skip any animations that are longer need associated with this timeline.
if (animation->GetTimeline() != this) {
// If animation has some other timeline, it better not be also in the
// animation list of this timeline object!
MOZ_ASSERT(!animation->GetTimeline());
animationsToRemove.AppendElement(animation);
continue;
}
needsTicks |= animation->NeedsTicks();
// Even if |animation| doesn't need future ticks, we should still
// Tick it this time around since it might just need a one-off tick in
// order to dispatch events.
animation->Tick();
if (!animation->IsRelevant() && !animation->NeedsTicks()) {
animationsToRemove.AppendElement(animation);
}
}
for (Animation* animation : animationsToRemove) {
RemoveAnimation(animation);
}
if (!needsTicks) {
// We already assert that GetRefreshDriver() is non-null at the beginning
// of this function but we check it again here to be sure that ticking
// animations does not have any side effects that cause us to lose the
// connection with the refresh driver, such as triggering the destruction
// of mDocument's PresShell.
MOZ_ASSERT(GetRefreshDriver(),
"Refresh driver should still be valid at end of WillRefresh");
UnregisterFromRefreshDriver();
}
}
void
ScrollbarActivity::ActivityStarted()
{
mNestedActivityCounter++;
CancelFadeBeginTimer();
if (!SetIsFading(false)) {
return;
}
UnregisterFromRefreshDriver();
StartListeningForScrollbarEvents();
StartListeningForScrollAreaEvents();
SetIsActive(true);
NS_ASSERTION(mIsActive, "need to be active during activity");
NS_ASSERTION(!mIsFading, "must not be fading during activity");
}
void
ScrollbarActivity::EndFade()
{
NS_ASSERTION(mIsActive, "still need to be active at this point");
NS_ASSERTION(!IsActivityOngoing(), "why wasn't the fade end timer cancelled when scrollbar activity started?");
if (!SetIsFading(false)) {
return;
}
SetIsActive(false);
UnregisterFromRefreshDriver();
StopListeningForScrollbarEvents();
if (!mDisplayOnMouseMove) {
StopListeningForScrollAreaEvents();
}
NS_ASSERTION(!mIsActive, "should have gone inactive after fade end");
NS_ASSERTION(!mIsFading, "shouldn't be fading anymore");
}
