After explicitly define default value for RestyleResult, we have a value
starting from 0 now. So, we can drop the explicity numbering.
MozReview-Commit-ID: 1UlpkUT6mAL
To create a stacking context for animations on transform:none segment,
we need to set NS_FRAME_MAY_BE_TRANSFORMED. The fix is comming in part 2.
Note that in case of animations which has properties preventing running on
the compositor, e.g., width or height, corresponding layer is not created
at all, but even in such cases, we normally set valid change hint for such
animations in each tick, i.e. restyles in each tick. For example:
div.animate([{ opacity: 1, width: '100px' }, { opacity: 0, width: '200px' }], 1000);
This animation causes restyles in every ticks without this patch, this patch
does not affect such animations at all. The only animations which will be
affected by this patch are animations which has opacity/transform but
did not have those properies. e.g, setting transform by setKeyframes or
changing target element from other target which prevents running on the
compositor, etc.
MozReview-Commit-ID: 78fYqyX8uDX
Use ReconstructFrame to replace NS_STYLE_HINT_FRAMECHANGE in many places, such
as HTML*Element::GetAttributeChangeHint and HTMLFrameSetElement::SetAttr.
MozReview-Commit-ID: EHbc4RMeuu0
Use ReconstructFrame to replace NS_STYLE_HINT_FRAMECHANGE in many places, such
as HTML*Element::GetAttributeChangeHint and HTMLFrameSetElement::SetAttr.
MozReview-Commit-ID: EHbc4RMeuu0
This is useful for writing tests that test particular optimizations,
such as that a particular operation doesn't cause restyles. It sits
next to similar counters for frames constructed and frames reflowed.
I also snuck in a preference for the less-expensive mPresContext over
the more expensive mFrame->PresContext() (which dereferences multiple
pointers).
(Originally written for work I planned to be part of bug 1189598.)
MozReview-Commit-ID: 8PN7nwLJG9r
Theoretically we should do the same for nsTreeBodyFrame, but that frame type is
harder to detect and I'm not sure it's worth adding code to support updating
background-position on XUL trees.
MozReview-Commit-ID: 8HPT53MX6bO
Theoretically we should do the same for nsTreeBodyFrame, but that frame type is
harder to detect and I'm not sure it's worth adding code to support updating
background-position on XUL trees.
MozReview-Commit-ID: 8HPT53MX6bO
Theoretically we should do the same for nsTreeBodyFrame, but that frame type is
harder to detect and I'm not sure it's worth adding code to support updating
background-position on XUL trees.
MozReview-Commit-ID: 8HPT53MX6bO
We also want to cancel transitions with destroyed frames, so the simplest way
is to extend the ability of AnimationsWithDestroyFrame to cancel transitions as
well.
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
