script/layout: Ensure a StackingContextTree before IntersectionObserver geometry queries (#38473)

IntersectionObserver needs to be able to query node geometry without
forcing a layout. A previous layout could have run without needing a
`StackingContextTree`. In that case the layout-less query should finish
building the `StackingContextTree` before doing the query.  Add a new
type of layout API which requests that layout finishes building the
StackingContextTree.

This change also slightly simplifies and corrects the naming of
`Element` APIs around client box queries.

Testing: This should fix intermittent failures in WPT tests.
Fixes: #38380.
Fixes: #38390.
Closes: #38400.

Signed-off-by: Martin Robinson <mrobinson@igalia.com>
This commit is contained in:
Martin Robinson 2025-08-06 15:46:43 +02:00 committed by GitHub
parent 757dbc0eda
commit 44a11a7c6c
No known key found for this signature in database
GPG key ID: B5690EEEBB952194
12 changed files with 78 additions and 59 deletions

View file

@ -0,0 +1,3 @@
[fixed-position-iframe-scroll.html]
[scrollTo(0, 1000)]
expected: FAIL