1986097 - [wpt-sync] Sync PR 54598 - [anchor] Add support for "scrollable containing-block".

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 54598 into mozilla-central (this bug is closed when the sync is complete).

PR: https://github.com/web-platform-tests/wpt/pull/54598
Details from upstream follow.

Ian Kilpatrick <[e-mail]> wrote:

[anchor] Add support for "scrollable containing-block".

The anchor positioning spec was updated to use a "scrollable
containing-block" when anchorpos was used.

Initially this was only for when "position-area" was specified, but
recently resolve to change behaviour whenever we find a "default anchor"
instead. See: https://github.com/w3c/csswg-drafts/issues/12552

To do this, expose the "InflowBounds" which we use to calculate where
the padding-edge is located for within the scrollable overflow
calculator. We access the inflow-bounds, and add/subtract the padding in
the appropriate direction to get the padding-box edge.

This new behaviour is flagged behind the CSSAnchorUpdate flag.

Bug: 438515315
Change-Id: I11572e6905de017fbb6bece76cc50276fda19162
Reviewed-on: https://chromium-review.googlesource.com/c/chromium/src/+/6886660
Commit-Queue: Ian Kilpatrick \<[e-mail]>
Reviewed-by: Morten Stenshorne \<[e-mail]>
Cr-Commit-Position: refs/heads/main@{#1508587}

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=43839601df665ee866d330f7db73d46b262d67a5

Comment 2

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

Attachment: Notable wpt changes

# CI Results

Ran 14 Firefox configurations based on mozilla-central, and Firefox, Chrome, and Safari on GitHub CI

Total 347 tests

## Status Summary

### Firefox
`OK`  : 3[GitHub] 212[Gecko-android-em-14-x86_64-debug-geckoview, Gecko-android-em-14-x86_64-lite-opt-geckoview, Gecko-android-em-14-x86_64-opt-geckoview, Gecko-android-em-7.0-x86_64-lite-qr-opt-geckoview, Gecko-android-em-7.0-x86_64-qr-debug-geckoview, Gecko-android-em-7.0-x86_64-qr-opt-geckoview, Gecko-linux2404-64-debug, Gecko-linux2404-64-opt, Gecko-windows11-32-24h2-debug, Gecko-windows11-32-24h2-opt, Gecko-windows11-64-24h2-debug, Gecko-windows11-64-24h2-opt]
`PASS`: 3[GitHub] 26[Gecko-linux2204-64-wayland-debug, Gecko-linux2204-64-wayland-opt] 9595[Gecko-windows11-32-24h2-debug, Gecko-windows11-32-24h2-opt] 9632[Gecko-windows11-64-24h2-debug] 9633[Gecko-windows11-64-24h2-opt] 9635[Gecko-android-em-14-x86_64-debug-geckoview, Gecko-android-em-14-x86_64-lite-opt-geckoview, Gecko-android-em-14-x86_64-opt-geckoview, Gecko-linux2404-64-debug, Gecko-linux2404-64-opt] 9636[Gecko-android-em-7.0-x86_64-lite-qr-opt-geckoview, Gecko-android-em-7.0-x86_64-qr-debug-geckoview, Gecko-android-em-7.0-x86_64-qr-opt-geckoview]
`FAIL`: 18[GitHub] 3883[Gecko-windows11-32-24h2-debug, Gecko-windows11-32-24h2-opt] 3950[Gecko-android-em-7.0-x86_64-lite-qr-opt-geckoview, Gecko-android-em-7.0-x86_64-qr-debug-geckoview, Gecko-android-em-7.0-x86_64-qr-opt-geckoview] 3951[Gecko-android-em-14-x86_64-debug-geckoview, Gecko-android-em-14-x86_64-lite-opt-geckoview, Gecko-android-em-14-x86_64-opt-geckoview] 3952[Gecko-linux2404-64-debug, Gecko-linux2404-64-opt] 3954[Gecko-windows11-64-24h2-opt] 3955[Gecko-windows11-64-24h2-debug]

### Chrome
`OK`  : 3
`PASS`: 3
`FAIL`: 18

### Safari
`OK`  : 3
`PASS`: 3
`FAIL`: 18

## Links
[Gecko CI (Treeherder)](https://treeherder.mozilla.org/#/jobs?repo=try&revision=43839601df665ee866d330f7db73d46b262d67a5)
[GitHub PR Head](https://wpt.fyi/results/?sha=95449a5dd8df2378223bc67ea99e14240998952c&label=pr_head)
[GitHub PR Base](https://wpt.fyi/results/?sha=95449a5dd8df2378223bc67ea99e14240998952c&label=pr_base)

## Details

(See attachment for full changes)

Comment 3

[Pulsebot]

Pushed by [e-mail]:
https://github.com/mozilla-firefox/firefox/commit/81ae2032a2fb
https://hg.mozilla.org/integration/autoland/rev/22ee899b3d86
[wpt PR 54598] - [anchor] Add support for "scrollable containing-block"., a=testonly
https://github.com/mozilla-firefox/firefox/commit/384e48112439
https://hg.mozilla.org/integration/autoland/rev/95e2d2b968d2
[wpt PR 54598] - Update wpt metadata, a=testonly

Comment 4

[Cosmin Sabou [:CosminS]]

https://hg.mozilla.org/mozilla-central/rev/22ee899b3d86
https://hg.mozilla.org/mozilla-central/rev/95e2d2b968d2