void event_handler (AnimationEvent event, Animation& animation)
{
switch (event)
{
case AnimationEvent_OnPlay: printf ("play animation '%s'\n", animation.Name ()); break;
case AnimationEvent_OnStop: printf ("stop animation '%s'\n", animation.Name ()); break;
case AnimationEvent_OnPause: printf ("pause animation '%s'\n", animation.Name ()); break;
case AnimationEvent_OnFinish: printf ("finish animation '%s'\n", animation.Name ()); break;
case AnimationEvent_OnUpdate: printf ("update animation '%s' (offset=%.2f)\n", animation.Name (), animation.Tell ()); break;
case AnimationEvent_OnDestroy: printf ("destroy animation '%s'\n", animation.Name ()); break;
default: break;
}
}
nsIStyleRule*
nsAnimationManager::CheckAnimationRule(nsStyleContext* aStyleContext,
mozilla::dom::Element* aElement)
{
if (!mPresContext->IsDynamic()) {
// For print or print preview, ignore animations.
return nullptr;
}
// Everything that causes our animation data to change triggers a
// style change, which in turn triggers a non-animation restyle.
// Likewise, when we initially construct frames, we're not in a
// style change, but also not in an animation restyle.
const nsStyleDisplay* disp = aStyleContext->StyleDisplay();
AnimationCollection* collection =
GetAnimations(aElement, aStyleContext->GetPseudoType(), false);
if (!collection &&
disp->mAnimationNameCount == 1 &&
disp->mAnimations[0].GetName().IsEmpty()) {
return nullptr;
}
nsAutoAnimationMutationBatch mb(aElement);
// build the animations list
dom::DocumentTimeline* timeline = aElement->OwnerDoc()->Timeline();
AnimationPtrArray newAnimations;
if (!aStyleContext->IsInDisplayNoneSubtree()) {
BuildAnimations(aStyleContext, aElement, timeline, newAnimations);
}
if (newAnimations.IsEmpty()) {
if (collection) {
// There might be transitions that run now that animations don't
// override them.
mPresContext->TransitionManager()->
UpdateCascadeResultsWithAnimationsToBeDestroyed(collection);
collection->Destroy();
}
return nullptr;
}
if (collection) {
collection->mStyleRule = nullptr;
collection->mStyleRuleRefreshTime = TimeStamp();
collection->UpdateAnimationGeneration(mPresContext);
// Copy over the start times and (if still paused) pause starts
// for each animation (matching on name only) that was also in the
// old list of animations.
// This means that we honor dynamic changes, which isn't what the
// spec says to do, but WebKit seems to honor at least some of
// them. See
// http://lists.w3.org/Archives/Public/www-style/2011Apr/0079.html
// In order to honor what the spec said, we'd copy more data over
// (or potentially optimize BuildAnimations to avoid rebuilding it
// in the first place).
if (!collection->mAnimations.IsEmpty()) {
for (size_t newIdx = newAnimations.Length(); newIdx-- != 0;) {
Animation* newAnim = newAnimations[newIdx];
// Find the matching animation with this name in the old list
// of animations. We iterate through both lists in a backwards
// direction which means that if there are more animations in
// the new list of animations with a given name than in the old
// list, it will be the animations towards the of the beginning of
// the list that do not match and are treated as new animations.
nsRefPtr<CSSAnimation> oldAnim;
size_t oldIdx = collection->mAnimations.Length();
while (oldIdx-- != 0) {
CSSAnimation* a = collection->mAnimations[oldIdx]->AsCSSAnimation();
MOZ_ASSERT(a, "All animations in the CSS Animation collection should"
" be CSSAnimation objects");
if (a->Name() == newAnim->Name()) {
oldAnim = a;
break;
}
}
if (!oldAnim) {
continue;
}
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 (oldAnim->GetEffect() && newAnim->GetEffect()) {
KeyframeEffectReadOnly* oldEffect = oldAnim->GetEffect();
KeyframeEffectReadOnly* newEffect = newAnim->GetEffect();
animationChanged =
oldEffect->Timing() != newEffect->Timing() ||
oldEffect->Properties() != newEffect->Properties();
oldEffect->Timing() = newEffect->Timing();
oldEffect->Properties() = newEffect->Properties();
}
// Reset compositor state so animation will be re-synchronized.
oldAnim->ClearIsRunningOnCompositor();
// Handle changes in play state. If the animation is idle, however,
// changes to animation-play-state should *not* restart it.
if (oldAnim->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 newAnim->IsStylePaused() but that requires
// downcasting to CSSAnimation and we happen to know that
// newAnim will only ever be paused by calling PauseFromStyle
// making IsPausedOrPausing synonymous in this case.)
if (!oldAnim->IsStylePaused() && newAnim->IsPausedOrPausing()) {
oldAnim->PauseFromStyle();
animationChanged = true;
} else if (oldAnim->IsStylePaused() &&
!newAnim->IsPausedOrPausing()) {
oldAnim->PlayFromStyle();
animationChanged = true;
}
}
if (animationChanged) {
nsNodeUtils::AnimationChanged(oldAnim);
}
// Replace new animation with the (updated) old one and remove the
// old one from the array so we don't try to match it any more.
//
// Although we're doing this while iterating this is safe because
// we're not changing the length of newAnimations and we've finished
// iterating over the list of old iterations.
newAnim->CancelFromStyle();
newAnim = nullptr;
newAnimations.ReplaceElementAt(newIdx, oldAnim);
collection->mAnimations.RemoveElementAt(oldIdx);
// We've touched the old animation's timing properties, so this
// could update the old animation's relevance.
oldAnim->UpdateRelevance();
}
}
} else {
collection =
GetAnimations(aElement, aStyleContext->GetPseudoType(), true);
}
collection->mAnimations.SwapElements(newAnimations);
collection->mNeedsRefreshes = true;
collection->Tick();
// Cancel removed animations
for (size_t newAnimIdx = newAnimations.Length(); newAnimIdx-- != 0; ) {
newAnimations[newAnimIdx]->CancelFromStyle();
}
UpdateCascadeResults(aStyleContext, collection);
TimeStamp refreshTime = mPresContext->RefreshDriver()->MostRecentRefresh();
UpdateStyleAndEvents(collection, refreshTime,
EnsureStyleRule_IsNotThrottled);
// We don't actually dispatch the mPendingEvents now. We'll either
// dispatch them the next time we get a refresh driver notification
// or the next time somebody calls
// nsPresShell::FlushPendingNotifications.
if (!mPendingEvents.IsEmpty()) {
mPresContext->Document()->SetNeedStyleFlush();
}
return GetAnimationRule(aElement, aStyleContext->GetPseudoType());
}
