In the new composite order arrangement CSSAnimations and CSSTransition have the
following life-cycle:
1. Animation created by markup
=> composite order determined by markup
(e.g. CSS animations use tree order and animation-name order;
CSS transitions use transition trigger order)
2. Animation cancelled by changing markup
=> composite order is undefined
3. Animation is played again using the API
=> composite order is defined by when the animation is first played.
Another way of saying this is that, at the point when the animation is
played, it is appended to the "global animation list".
4. Animation is subsequently cancelled / played => no change
We need a way to know when we are going from 2 to 3. It would seem like we
could do that by setting mAnimationIndex to some sentinel value while it is
in 2. However, even when in 2, although the spec doesn't define the composite
order animations at this point (from an API point of view you can't access these
objects and they don't contribute to style so it doesn't need to be defined), we
sometimes will need to establish an order.
This can happen, for example, when an animation queues events and then is later
cancelled before the events are dispatched. Because we sort events based on
their associated animation at the time of dispatch (for performance reasons) we
need a deterministic order for these idle animations.
We do that (in a subsequent patch in this series) by setting mAnimationIndex
when we transition from 1 to 2. That is, these idle animations are effectively
ordered by when they became idle (which always happens in a deterministic
fashion).
The Web Animations specification has replaced the term "sequence number" with
references to a global animation list. This patch applies similar naming
to our animation structures.
All extensions in version-control-tools should support Bugzilla API Keys
now. MozReview requires them. We'll likely remove support for passwords
and cookie auth in the future. This commit transitions the Mercurial
setup wizard to API Keys exclusively.
DONTBUILD (NPOTB)
This ensures that regions beyond the clip are painted, and async scrolling can reveal them by moving the layer-level clip.
This patch also ensures that we continue creating mask layers for fixed background layers correctly, where appropriate.
In this case the test image is painted using -moz-element which layerizes
differently than not using -moz-element when APZ is enabled. This slight
layerization difference causes a few pixels to be different and the reftest
to fail. Fuzzing it seems reasonable as the fundamental nature of the test
is unchanged.
The new check in ErrorResult::ReportErrorWithMessage() shouldn't be
needed and is just to protect against the possibility of another way
to construct messages being added.
