nsDocument::GetAnimationController() will lazily create an animation controller
which, in some call sites, is unnecessary.
This patch first calls HasAnimationController() and only calls
GetAnimationController() if it returns true. This avoids creating an animation
controller in situations where one is not necessarily required.
MozReview-Commit-ID: 4cdpLRvMVJU
This patch splits up the existing "layout/style-sets" measurement into
"layout/gecko-style-sets", or "layout/servo-style-sets/stylist/rule-tree" and
"layout/servo-style-sets/other". (Additional things will be measured under
"layout/servo-style-sets/" later, such as cascade data.)
This requires introducing a new type, ServoStyleSetSizes, for transferring the
multiple measurements from Rust code to C++ code.
MozReview-Commit-ID: FbmzpsjBpgI
I've verified with the profiler that we use the parallel traversal for
loading a foreground tab, but not for a tab opened with ctrl-click.
MozReview-Commit-ID: 2SiVDlLLyah
Bindgen bitfield enums don't work as return values with the Linux 32-bit ABI at
the moment because they wrap the value in a struct.
This causes the Rust side to believe the caller will pass along space for the
struct return value, while C++ believes it's just an integer value.
MozReview-Commit-ID: LY6z7lEKgOp
Now that we do process normal traversal even in the case of throttled animation
flush so that we don't need to do special handling for the case.
Note about the comment in has_current_styles():
the remaining animation hints is not caused by either this patch or the
previous patch in this patch series, it's been there in the first place, but
it should be fixed somehow later. See bug 1389675.
MozReview-Commit-ID: JojHufxNCiS
The buggy animation handling isn't a regression, since currently we pass
UnstyledChildrenOnly in those cases, which blocks the animation traversal
in Servo_TraverseSubtree.
In general I really wanted to handle these two paths together. But there's
enough broken with the NewChildren path that I wanted to scope the buginess
as tightly as possible. And I really need to separate the handling here from
StyleDocument() to make the restyle root stuff work.
MozReview-Commit-ID: 9F0mcQl7AAX
This makes things a bit easier to follow, and sets the stage for eliminating
PrepareAndTraverseSubtree and making StyleDocument restyle-root-aware.
MozReview-Commit-ID: 40ORrqAuXni
the PreTraverse stuff is all about ticking animations, which isn't something we
want to do when we're trying to get styles synchronously in the frame
constructor.
MozReview-Commit-ID: L6lw4ef4Jdk
This doesn't actually implement style context reparenting in the style set yet; that part is next.
There is one behavior difference being introduced here compared to Gecko: we
don't reparent the first block piece of an {ib} (block-inside-inline) split
whose first inline piece is being reparented. This is actually a correctness
fix. In this testcase:
<style>
#target { color: green; }
#target::first-line { color: red; }
</style>
<div id="target">
<span>
<div>This should be green</div>
</span>
</div>
Gecko makes the text red, while every other browser makes it green.
We're preserving Gecko's behavior for out-of-flows in first-line so far, but
arguably it's wrong per spec and doesn't match other browsers either. We can
look into changing it later.
MozReview-Commit-ID: 5eC6G449Mlh
