This patch (after stepping through the call graph) affects the following
places:
* CommonAnimationManager::GetAnimationsForCompositor, which is used
only by nsDisplayListBuilder::AddAnimationsAndTransitionsToLayer,
which already checks the individual animations (so really no change)
* AnimationPlayerCollection::CanThrottleAnimation
* ActiveLayerTracker::IsStyleAnimated
* nsLayoutUtils::HasAnimationsForCompositor
* nsLayoutUtils::HasAnimations (which is used only to check whether we
can make the 0-opacity optimization)
I believe it makes sense to change all of these locations (although in
the long term we want to throttle (or similar) more animations).
Without this patch, I believe we're forcing the creation of an opacity
layer because we think we have animations to send to it.
This is the main patch for the bug; it makes us use the mechanism added
in bug 1125455 to avoid sending animations that aren't currently
applying to the compositor.
Patch 7 is needed to make this code rerun in all the cases where we need
to rerun it, though.
This patch renames the confusing IsRunning method since IsRunning() is *not*
the same as (PlayState() == AnimationPlayState::Running). It also removes
the old definition to make better re-use of PlayState() and IsInPlay().
This patch adds a method for testing if an animation is "in play" which is
a term defined in the Web Animations spec. This is in preparation for removing
some slightly redundant code in IsRunning and aligning better with the spec.
In preparation for introducing IsInPlay (where "in play" is a term in the Web
Animations spec), this patch aligns the existing IsCurrent with the definition
in the spec that says an animation effect is only current if it is attached
to an animation (player in our current naming) that is not finished. In order
to ensure that we need to pass the animation/player into the method.
This actually changes the behavior of IsCurrent since now we will return false
for animations that are finished. As far as I can tell, all the call sites that
are requesting current animations should only be concerned with animations that
are actually running. If not, they need to be adjusted to look for animations
that are either current or in effect.
This patch simply updates the method that cancels pending plays to also cancel
pending pauses. As it stands, for some of places where this is called it might
not be appropriate to cancel pending pauses but we will adjust each of these
call sites one-by-one in subsequent patches in this series.
IsPaused is used in nsAnimationManager to detect if a newly created animation
should be paused. It is also used inside AnimationPlayer::IsRunning which is
used to determine what animations to send to the compositor (we don't send
paused animations to the compositor). In all these cases we want to treat paused
animations and pause-pending animations alike.
This patch updates IsPaused to include also pause-pending animations. At the
same time it renames IsPaused to IsPausedOrPausing to reflect the change in
behavior.
This patch also adjusts a few nearby one-line functions to put the opening brace
on a new line since apparently this is what the coding style says to do.
This won't actually do anything yet because:
(a) We don't yet add pause-pending players to the PendingPlayerTracker
(b) We never mark pausing players as pending so
AnimationPlayer::TriggerOnNextTick will just ignore them.
These methods will soon be used to start animations that are waiting to start
and also to finish pausing animations that are waiting to pause. As a result
we rename them to TriggerXXX since that's a bit more generic.
There are still references to StartXXX within PendingPlayerTracker. These will
be updated in a subsequent patch once we have the appropriate methods available
on AnimationPlayer to call.
This patch extends the PendingPlayerTracker which is currently used to record
which animations are waiting to play, such that it can also handle animations
which are waiting to complete a pause operation.
It doesn't yet do anything with the pause-pending animations, that will come
in another patch.
A number of animation tests assume that pausing happens instantaneously. This
patch adjust many of those tests so that they will continue to work when
pausing happens asynchronously. In many cases this is possible because we
know the ready promise on AnimationPlayer (soon to be Animation) objects will
be resolved so we can wait on it and it will resolve immediately now, but when
asynchronous pausing is introduced the test the promise won't resolve until
after the pause operation is complete.
There are some tests that can't be so easily adjusted and we will have to fix
these at the same time as we turn on async pausing. However, taking care of
this set of tests now should reduce the size of subsequent patches in this
series.
Now that we have separate tests for checking the initial state of startTime we
can remove these checks from tests for setting the startTime.
Also, while we're at it, we needn't check the playState and animationPlayState
since these should be covered by other tests.
Jonathan Watt
Cameron McCormack
L. David Baron
Tom Tromey
Brian Birtles
Mason Chang
Ehsan Akhgari
Boris Zbarsky
Carsten "Tomcat" Book
Jonathan Griffin