Having a non-null mInstanceOwner corresponds to when registration
normally happens (from nsPluginInstanceOwner::SetFrame), and it's
disconnecting the instance owner that leads to unregistration.
MozReview-Commit-ID: 3X15t9zoXIj
The previous annotations only checked if the re-entrancy happened via DecrementVisibleCount.
The check in RebuildApproximateFrameVisibility is not needed because we add a check in DoUpdateApproximateFrameVisibility.
The check in ClearApproximatelyVisibleFramesList is not needed because we add checks in DoUpdateApproximateFrameVisibility and Destroy. The other caller, ClearApproximateFrameVisibilityVisited, is covered because it is only called from DoUpdateApproximateFrameVisibility.
MozReview-Commit-ID: 5UaOQ4l50wP
While processing restyles and starting transitions, we may trigger
a call to EffectCompositor::UpdateCascadeResults which may, in turn, call
EffectCompositor::RequestRestyle with RestyleType::Layer, which ultimately
results in a call to RestyleManager::IncrementAnimationGeneration().
Typically, nsTransitionManager::StyleContextChanged compares the animation
generation on its collection with that of the restyle manager and uses this
to ignore the restyle that it generates. However, given the sequence of events
above, that check may no longer help since the restyle manager's animation
generation will be out of step. As a result,
nsTransitionManager::StyleContextChanged will fail to ignore a subsequent
and redundant restyle. With certain combinations of content, this can mean that
restyles are posted in such a manner than an infinite cycle of restyles ensues.
This patch causes RestyleManager to ignore calls to IncrementAnimationGeneration
when it is already processing restyles such that the animation generation is
only ever updated once per restyle. This makes the check for a matching
animation generation in nsTransitionManager::StyleContextChanged work as
expected, preventing us from generating needless transitions which can produce
this endless loop.
MozReview-Commit-ID: 9HYDrknKPAI
This is needed because blending for nsDisplayBackgroundImage items will soon
happen outside of nsDisplayBackgroundImage::Paint, it will be done by an
nsDisplayBlendMode item that wraps the nsDisplayBackgroundImage item.
MozReview-Commit-ID: 20cILOGVFEG
This is needed because blending for nsDisplayBackgroundImage items will soon
happen outside of nsDisplayBackgroundImage::Paint, it will be done by an
nsDisplayBlendMode item that wraps the nsDisplayBackgroundImage item.
MozReview-Commit-ID: 20cILOGVFEG
I've decided to fix this in a very explicit way. The only "magic" part that's
left is how we decide that the AGR of the perspective item is outside the
scrolled frame (and I'm not sure myself how that works).
I didn't want to change what scroll clips we set on what items, because the
scroll clip really belongs on the perspective item, because that's the item
that needs to be clipped, and it should also be the item that should be
scrolled if it weren't for the fact that APZ wouldn't know that it should
apply the perspective transform before the APZ transform.
MozReview-Commit-ID: BBw8VPohQI4
