1727545 - [wpt-sync] Sync PR 30175 - [css-text] Test text-align: match-parent on the root element

Status: RESOLVED FIXED

(Core :: Layout: Text and Fonts, task, P4)

Description

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

Sync web-platform-tests PR 30175 into mozilla-central (this bug is closed when the sync is complete).

PR: https://github.com/web-platform-tests/wpt/pull/30175
Details from upstream follow.

b'Simon Pieters <[e-mail]>' wrote:

[css-text] Test text-align: match-parent on the root element

If I understand correctly, a used value of 'direction: rtl' on the root element is propagated to the ICB per https://drafts.csswg.org/css-writing-modes-3/#icb

Then, https://drafts.csswg.org/css-text/#valdef-text-align-match-parent says

match-parent
This value behaves the same as inherit (computes to its parent’s computed value) except that an inherited value of start or end is interpreted against the parent’s (or the initial containing block’s, if there is no parent) direction value and results in a computed value of either left or right. When specified on the text-align shorthand, sets both text-align-all and text-align-last to match-parent.

The initial value of text-align is 'start', so I guess the inherited value for the root element has to be 'start'. Therefore, it looks at the 'direction' of the ICB, which is propagated from the root element, and is thus 'rtl'. Therefore text-align should compute to 'right'.

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=854e87acfbabcd18012167e11f4a09f6bed1c202

Comment 2

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

CI Results

Ran 10 Firefox configurations based on mozilla-central, and Firefox, Chrome, and Safari on GitHub CI

Total 2 tests

Status Summary

Firefox

OK : 1
PASS: 1[Gecko-android-em-7.0-x86_64-qr-debug-isolated-process-geckoview] 2[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-linux1804-64-qr-debug, Gecko-linux1804-64-qr-opt, Gecko-windows10-32-2004-qr-debug, Gecko-windows10-32-2004-qr-opt, Gecko-windows10-64-2004-qr-debug, Gecko-windows10-64-2004-qr-opt, GitHub]

Chrome

OK : 1
PASS: 2

Safari

OK : 1
PASS: 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/fa8ebad0eb69
[wpt PR 30175] - [css-text] Test text-align: match-parent on the root element, a=testonly

Comment 4

[Sandor Molnar[:smolnar]]

https://hg.mozilla.org/mozilla-central/rev/fa8ebad0eb69