This patch removes the check that skipped queueing events for animations
without keyframes since the spec indicates such animations should dispatch
events.
There is a further correctness fix here for the case where a keyframes rule
is modified using the CSSOM so that it becomes empty. Previously when we
came to create the new animation rules we would end up setting
ElementAnimations::mNeedRefreshes to false since we check if the keyframes
rule is empty and if it is we would skip all further processing (including
setting mNeedsRefreshes).
That means that:
(a) We may end up unregistering from the refresh observer so we would never
dispatch the end event for such an animation.
(b) If the animation was running on the compositor we may never remove it from
the compositor or may not do it in a timely fashion.
To fix both these problems, this patch removes the check for an empty keyframes
rule so that mNeedsRefreshes is set in this case.
This patch adjusts the tests for transform transitions that run on the
compositor to handle transitions that begin with a non-invertible transform.
In this case the first sample at the start of the animation won't create
a layer because in nsDisplayTransform::BuildLayer
/ FrameLayerBuilder::BuildContainerLayerFor we'll skip creating the layer once
we notice the equivalent matrix is singular.
In this patch we detect that case and force an extra sample betwee 0 and 200s at
100s. This means the layer will be created at t=100s and be available for
querying at the next sample.
Similar issues could occur, for example, if the transforms at both t=0s
and t=100s are not invertible but currently that doesn't occur. We can add
handling for that if and when it becomes necessary.
This patch moves some test utility methods from test_animations_omta.html to
animation_utils.js. It also renames addAsyncTest to addAsyncAnimTest and
likewise for a few other methods.
Since off-main thread animation (OMTA) is not available on all platforms we
define a common wrapper function that runs OMTA tests only when available. This
patch further performs an internal check of basic OMTA operation so that
only a single error is produced if OMTA is unexpectedly unavailable.
Typical usage is:
SimpleTest.waitForExplicitFinish();
runOMTATest(function() {
... test code ...
SimpleTest.finish();
},
SimpleTest.finish);
This can be easily wrapped with promises if needed but does not require using
promises.
The calls to waitForExplicitFinish and finish are not performed automatically
since this function may be integrated with test suites that do other work
outside the call to runOMTATest.
