This make it easier to print a frame tag name in one debug log line.
--HG--
extra : commitid : 5bl8GhmTLQi
extra : rebase_source : f151c98dc99c33e8050b106ab8695a9053dbb3ad
AnimationCollection::HasAnimationOfProperty uses IsFinishedTransition to filter
out transitions that should otherwise be ignored. This is used in the following
places:
1. nsLayoutUtils::HasAnimations
The is only used by nsIFrame::BuildDisplayListForStackingContext to see if
there are any opacity animations
For this case, simply returning *current* animations would be sufficient
(since finished but filling animations should have already filled in the
display opacity)
2. CommonAnimationManager::GetAnimationsForCompositor
This should really only return *current* animations--that is, animations that
are running or scheduled to run. Finished animations never run on the
compositor. Indeed, only *playing* animations run on the compositor but, as
we will see in some of the cases below, it is sometimes useful to know that
an animation *will* run on the compositor in the near future (e.g. so we can
pre-render content).
The places where GetAnimationsForCompositor is used are:
- When building layers to add animations to layers in nsDisplayList--in this
case we skip any animations that aren't playing so if
GetAnimationsForCompositor only returned current animations that would be
more than sufficient.
- In nsLayoutUtils::HasAnimationsForCompositor. This in turn is used:
- In ChooseScaleAndSetTransform to see if the transform is being animated
on the compositor. If so, it calls
nsLayoutUtils::ComputeSuitableScaleForAnimation (which also calls
GetAnimationsForCompositor) and passes the result to
GetMinAndMaxScaleForAnimationProperty which we have already adjusted in
part 4 of this patch series to only deal with *relevant* animations
Relevant animations include both current animations and in effect
animations but we don't run forwards-filling animations on the compositor
so GetAnimationsForCompositor should NOT return them. Current animations
should be enough. In fact, playing animations should be enough but we
might want to pre-render layers at a suitable size during their delay
phase so returning current animations is probably ok.
- In nsDisplayListBuilder::MarkOutOfFlowFrameForDisplay to add a fuzz
factor to the overflow rect for frames undergoing a transform animation
on the compositor. In this case too current animations should be
sufficient.
- In nsDisplayOpacity::NeedsActiveLayer to say "yes" if we are animating
opacity on the compositor. Presumably in this case it would be good to
say "yes" if the animation is in the delay phase too (as it currently
does). After the animation is finished, we should drop the layer, i.e.
current animations should be sufficient.
- In nsDisplayTransform::ShouldPrerenderTransformedContent. As with
nsDisplayOpacity::NeedsActiveLayer, we only need to pre-render
transformed content for animations that are current.
- In nsDisplayTransform::GetLayerState. As with
nsDisplayOpacity::NeedsActiveLayer, we only need to return active here
for current animations.
- In nsIFrame::IsTransformed. Here we test the display style to see if
there is a transform and also check if transform is being animated on the
compositor. As a result, we really only need HasAnimationsForCompositor
to return true for animations that are playing--otherwise the display
style will tell us if we're transformed or not. Returning true for all
current compositor animations (which is a superset of playing), however,
should not cause problems (we already return true for even more than
that).
- In nsIFrame::HasOpacityInternal which is much the same as
nsIFrame::IsTransformed and hence current should be fine.
3. AnimationCollection::CanThrottleAnimation
Here, HasAnimationOfProperty is used when looking for animations that would
disqualify us from throttling the animation by having an out-of-date layer
generation or being a transform animation that affects scroll and so requires
that we do the occasional main thread sample to update scrollbars.
It would seem like current animations are enough here too. One interesting
case is where we *had* a compositor animation but it has finished or been
cancelled. In that case, the animation won't be current and we should not
throttle the animation since we need to take it off its layer.
It turns out checking for current animations is still ok in this case too.
The reasoning is as follows:
- If the animation is newly-finished, we'll pick that up in
Animation::CanThrottle and return false then.
- If the animation is newly-idle then there are two cases:
If the cancelled animation was the only compositor animation then
AnimationCollection::CanPerformOnCompositorThread will notice that there
are no playing compositor animations and return false and
AnimationCollection::CanThrottleAnimation will never be called.
If there are other compositor animations running, then
AnimationCollection::CanThrottleAnimation will still return false because
whatever cancelled the animation will update the animation generation and
we'll notice the mismatch between the layer animation generation and the
animation generation on the collection.
Based on the above analysis it appears that making
AnimationCollection::HasAnimationOfProperty return only current animations (and
simulatneously renaming it to HasCurrentAnimationOfProperty) is safe. Indeed, in
effect, we already do this for transitions but not for animations. This patch
generalizes this behavior to all animations.
This patch also updates test_animations_omta.html since it was incorrectly
testing that a finished opacity animation was still running on the compositor.
Finished animations should not run on the compositor and the changes in this
patch cause that to happen. The reason we don't just update this test to check
for RunningOn.MainThread is that for opacity animations, unlike transform
animations, we can't detect if an opacity on a layer was set by animation or
not. As a result, for opacity animations we typically test the opacity on
either the main thread or compositor in order to allow for the case where an
animation-set opacity is still lingering on the compositor.
The goal of ComputeCollapsedBStartMargin is to collapse all of the
margins that collapse with a block's top margin. It does this by
scanning forward through the child list until it finds something that
blocks collapsing; it descends into children through recursion. When we
find a non-empty block or line, we stop collapsing and report to the
parent that the child is non-empty so that it stops collapsing as well.
This patch changes our behavior when we have clearance to do the same
thing that we do for non-empty lines or blocks (which makes both
occurrences of |goto done| be preceded by the same code). Without the
patch we would fail to report being non-empty to the parent (and instead
report emptiness based on the IsEmpty() method). This meant that,
without the patch, if a block has a child with clearance but also has
IsEmpty() true, we would stop scanning margins in that block after the
clearance, but start searching again for margins in the block's parent,
starting with the block's bottom margin. This patch sets *aBlockIsEmpty
to true in that case so that we do not pick up again in the block's
parent (or, potentially, grandparent, etc.).
--HG--
extra : commitid : LCMTvXvZT3G
This was introduced in bug 209694 (gecko-dev 13a65028) but became unused
through bug 292295 (gecko-dev 4593df2a57) and bug 300030 (gecko-dev
31f18988).
--HG--
extra : commitid : 1YUuWOKeInm
This adds an additional retry loop in block reflow that we can only
trigger when reflowing a block formatting context (replacedBlock
non-null). It can retry in two different ways, either with a narrower
width but at the same vertical position (when
ReplacedBlockFitsInAvailSpace is still true) or at a new vertical
position (which is treated as a form of clearance).
Fortunately we don't have to worry about margins collapsing *through*
such a boundary since we're dealing with a new block formatting context.
Note that Chromium passes all of the new bfc-displace-* tests, although
it moves the block formating context down unnecessarily in
bfc-shrink-1.html (which we do neither before nor after the patch),
though agrees with the width we have after the patch (but not before the
patch).
--HG--
extra : commitid : FgDc4hjTxHp
This makes it clearer that, unlike how SizeOf*() functions usually work, this
doesn't measure any children hanging off the array.
And do likewise for nsTObserverArray.
--HG--
extra : rebase_source : 6a8c8d8ffb53ad51b5773afea77126cdd767f149
AppendScrollPartsTo finds or creates a scroll id for the current scroll frame if IsMaybeScrollingActive() is true (otherwise it uses the null scrollid). IsMaybeScrollingActive() looks at mShouldBuildScrollableLayer, which we compute after the first call to AppendScrollPartsTo in ScrollFrameHelper::BuildDisplayList.
This means that on the first paint with a displayport set (or even if we create a displayport is ScrollFrameHelper::BuildDisplayList) we wouldn't layerize the scroll thumb in nsSliderFrame::BuildDisplayListForChildren because it looks for the current scroll id set on the display list builder. On subsequent paints this would be corrected so it caused reftest failures.
Without this change, nsBlockFrame::ReflowBlockFrame will fail to have
mayNeedRetry true, which means that it won't set
blockHTMLRS.mDiscoveredClearance, which means that on a descendant
replaced block we will fail to fall into any of the cases that call
ClearFloats. This change will cause us to hit the first ClearFloats
call and discover the need for clearance.
I tested locally that the new reftest fails without the patch and passes
with the patch.
Masayuki Nakano
Mats Palmgren
Ting-Yu Lin
Kartikaya Gupta
Cameron McCormack
Robert O'Callahan
Ryan VanderMeulen
William Chen
Ehsan Akhgari
Xidorn Quan
Jonathan Kew
Matt Woodrow
Brian Birtles
L. David Baron
CJ Ku
Daniel Holbert
Nicholas Nethercote
Timothy Nikkel
Kearwood (Kip) Gilbert
Boris Zbarsky
Ted Clancy