1941546 - [wpt-sync] Sync PR 50069 - Compute after-change style if necessary

Status: RESOLVED FIXED

(Core :: CSS Transitions and Animations, task, P4)

Description

[Web Platform Test Sync Bot [:wpt-sync] (Matrix: #interop:mozilla.org)]

Sync web-platform-tests PR 50069 into mozilla-central (this bug is closed when the sync is complete).

PR: https://github.com/web-platform-tests/wpt/pull/50069
Details from upstream follow.

Rune Lillesveen <[e-mail]> wrote:

Compute after-change style if necessary

The base style from StyleBaseData was used as the after-change style for
starting CSS transitions. That works as long as the base style does not
inherit animation effects from ancestors.

Detect that we need to cascade after-change style separately by walking
the ancestors of the element we are handling transitions for, checking
if any ancestors are animating the property we consider a transition
for. If necessary, compute the after-change style as far up as
necessary.

The after-change style is only cached for the element that's currently
being resolved.

Bug: 40337057

Change-Id: I6bfcb02f8935605d4f286a16fe1dafe717499509
Reviewed-on: https://chromium-review.googlesource.com/6110431
WPT-Export-Revision: c021e03897d469d0334f2c6178f06aea279cd39d

Comment 1

[Web Platform Test Sync Bot [:wpt-sync] (Matrix: #interop:mozilla.org)]

Pushed to try (stability) https://treeherder.mozilla.org/#/jobs?repo=try&revision=f90640a38f48bcc53003232f67e20787f9fa6fcd

Comment 2

[Web Platform Test Sync Bot [:wpt-sync] (Matrix: #interop:mozilla.org)]

CI Results

Ran 9 Firefox configurations based on mozilla-central, and Firefox, Chrome, and Safari on GitHub CI

Total 1 tests and 2 subtests

Status Summary

Firefox

OK : 1
PASS: 2

Chrome

OK : 1
FAIL: 2

Safari

OK : 1
FAIL: 2

Links

Gecko CI (Treeherder)
GitHub PR Head
GitHub PR Base

Comment 3

[Pulsebot]

Pushed by [e-mail]:
https://hg.mozilla.org/integration/autoland/rev/e404f2e42ac1
[wpt PR 50069] - Compute after-change style if necessary, a=testonly

Comment 4

[Serban Stanca [:SerbanS]]

https://hg.mozilla.org/mozilla-central/rev/e404f2e42ac1