1933737 - [wpt-sync] Sync PR 49398 - Match argument of :host[-context]() in correct context

Status: RESOLVED FIXED

(Core :: CSS Parsing and Computation, task, P4)

Description

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

Sync web-platform-tests PR 49398 into mozilla-central (this bug is closed when the sync is complete).

PR: https://github.com/web-platform-tests/wpt/pull/49398
Details from upstream follow.

Anders Hartvoll Ruud <[e-mail]> wrote:

Match argument of :host-context in correct context

We currently make the host non-featureless via the
treat_shadow_host_as_normal_scope flag, and while that part is
correct behavior, we must also ensure that we're matching
in the right tree context, otherwise selectors like :host(:host)
incorrectly match.

If we set the correct tree_scope when matching the host pseudo's
argument, the host automatically becomes non-featureless, and we
don't need the flag anymore.

Firefox has the same bug, but Safari has the correct behavior.

Fixed: 380088825
Change-Id: Ic37f7614120ee9d7f643afb9a44c08eae62dae74
Reviewed-on: https://chromium-review.googlesource.com/c/chromium/src/+/6037620
Reviewed-by: Rune Lillesveen \<[e-mail]>
Commit-Queue: Anders Hartvoll Ruud \<[e-mail]>
Cr-Commit-Position: refs/heads/main@{#1388770}

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=22838699dd7cbf09bf27a0ea520d1af9653fab24

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 2 tests and 1 subtests

Status Summary

Firefox

OK : 2
PASS: 1
FAIL: 1

Chrome

OK : 2
FAIL: 2

Safari

OK : 2
PASS: 2

Links

Gecko CI (Treeherder)
GitHub PR Head
GitHub PR Base

Details

New Tests That Don't Pass

• /css/css-scoping/host-in-host-selector.html [wpt.fyi]
  • CSS Scoping: :host(:host): FAIL (Chrome: FAIL, Safari: PASS)

Comment 3

[Pulsebot]

Pushed by [e-mail]:
https://hg.mozilla.org/integration/autoland/rev/df4e2494f1e6
[wpt PR 49398] - Match argument of :host[-context]() in correct context, a=testonly
https://hg.mozilla.org/integration/autoland/rev/e1d51ec04f46
[wpt PR 49398] - Update wpt metadata, a=testonly

Comment 4

[Atila Butkovits]

https://hg.mozilla.org/mozilla-central/rev/df4e2494f1e6
https://hg.mozilla.org/mozilla-central/rev/e1d51ec04f46