/* virtual */ void
nsAnimationManager::WillRefresh(mozilla::TimeStamp aTime)
{
NS_ABORT_IF_FALSE(mPresContext,
"refresh driver should not notify additional observers "
"after pres context has been destroyed");
if (!mPresContext->GetPresShell()) {
// Someone might be keeping mPresContext alive past the point
// where it has been torn down; don't bother doing anything in
// this case. But do get rid of all our transitions so we stop
// triggering refreshes.
RemoveAllElementData();
return;
}
// FIXME: check that there's at least one style rule that's not
// in its "done" state, and if there isn't, remove ourselves from
// the refresh driver (but leave the animations!).
for (PRCList *l = PR_LIST_HEAD(&mElementData); l != &mElementData;
l = PR_NEXT_LINK(l)) {
ElementAnimations *ea = static_cast<ElementAnimations*>(l);
nsRefPtr<css::AnimValuesStyleRule> oldStyleRule = ea->mStyleRule;
bool shouldInterpolate = !ea->CanPerformOnCompositorThread();
ea->EnsureStyleRuleFor(mPresContext->RefreshDriver()->MostRecentRefresh(),
mPendingEvents, shouldInterpolate);
if (oldStyleRule != ea->mStyleRule && shouldInterpolate) {
ea->PostRestyleForAnimation(mPresContext);
}
}
DispatchEvents(); // may destroy us
}
void
nsAnimationManager::FlushAnimations(FlushFlags aFlags)
{
// FIXME: check that there's at least one style rule that's not
// in its "done" state, and if there isn't, remove ourselves from
// the refresh driver (but leave the animations!).
TimeStamp now = mPresContext->RefreshDriver()->MostRecentRefresh();
bool didThrottle = false;
for (PRCList *l = PR_LIST_HEAD(&mElementData); l != &mElementData;
l = PR_NEXT_LINK(l)) {
ElementAnimations *ea = static_cast<ElementAnimations*>(l);
bool canThrottleTick = aFlags == Can_Throttle &&
ea->CanPerformOnCompositorThread(
CommonElementAnimationData::CanAnimateFlags(0)) &&
ea->CanThrottleAnimation(now);
nsRefPtr<css::AnimValuesStyleRule> oldStyleRule = ea->mStyleRule;
ea->EnsureStyleRuleFor(now, mPendingEvents, canThrottleTick);
if (oldStyleRule != ea->mStyleRule) {
ea->PostRestyleForAnimation(mPresContext);
} else {
didThrottle = true;
}
}
if (didThrottle) {
mPresContext->Document()->SetNeedStyleFlush();
}
DispatchEvents(); // may destroy us
}
nsIStyleRule*
nsAnimationManager::CheckAnimationRule(nsStyleContext* aStyleContext,
mozilla::dom::Element* aElement)
{
if (!mPresContext->IsProcessingAnimationStyleChange()) {
// 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->GetStyleDisplay();
ElementAnimations *ea =
GetElementAnimations(aElement, aStyleContext->GetPseudoType(), false);
if (!ea &&
disp->mAnimations.Length() == 1 &&
disp->mAnimations[0].GetName().IsEmpty()) {
return nsnull;
}
// build the animations list
InfallibleTArray<ElementAnimation> newAnimations;
BuildAnimations(aStyleContext, newAnimations);
if (newAnimations.IsEmpty()) {
if (ea) {
ea->Destroy();
}
return nsnull;
}
TimeStamp refreshTime = mPresContext->RefreshDriver()->MostRecentRefresh();
if (ea) {
if (ea->CanPerformOnCompositorThread()) {
// We must invalidate to ensure that we rebuild the layer,
// since we are not interpolating on the main thread.
nsIFrame* frame = mPresContext->GetRootPresContext()->PresShell()->GetRootFrame();
frame->InvalidateWithFlags(frame->GetRect(), nsIFrame::INVALIDATE_NO_THEBES_LAYERS);
}
// The cached style rule is invalid.
ea->mStyleRule = nsnull;
ea->mStyleRuleRefreshTime = TimeStamp();
// 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 (!ea->mAnimations.IsEmpty()) {
for (PRUint32 newIdx = 0, newEnd = newAnimations.Length();
newIdx != newEnd; ++newIdx) {
ElementAnimation *newAnim = &newAnimations[newIdx];
// Find the matching animation with this name in the old list
// of animations. Because of this code, they must all have
// the same start time, though they might differ in pause
// state. So if a page uses multiple copies of the same
// animation in one element's animation list, and gives them
// different pause states, they, well, get what they deserve.
// We'll use the last one since it's more likely to be the one
// doing something.
const ElementAnimation *oldAnim = nsnull;
for (PRUint32 oldIdx = ea->mAnimations.Length(); oldIdx-- != 0; ) {
const ElementAnimation *a = &ea->mAnimations[oldIdx];
if (a->mName == newAnim->mName) {
oldAnim = a;
break;
}
}
if (!oldAnim) {
continue;
}
newAnim->mStartTime = oldAnim->mStartTime;
newAnim->mLastNotification = oldAnim->mLastNotification;
if (oldAnim->IsPaused()) {
if (newAnim->IsPaused()) {
// Copy pause start just like start time.
newAnim->mPauseStart = oldAnim->mPauseStart;
} else {
// Handle change in pause state by adjusting start
// time to unpause.
newAnim->mStartTime += refreshTime - oldAnim->mPauseStart;
}
}
}
}
ea->mAnimations.SwapElements(newAnimations);
} else {
ea = GetElementAnimations(aElement, aStyleContext->GetPseudoType(),
true);
ea->mAnimations.SwapElements(newAnimations);
AddElementData(ea);
}
ea->mNeedsRefreshes = true;
ea->EnsureStyleRuleFor(refreshTime, mPendingEvents);
// 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());
}
