1730763 - CSS containment should block propagation from body to viewport

Status: RESOLVED FIXED

(Core :: Layout, defect)

Description

[rune.lillesveen]

User Agent: Mozilla/5.0 (Macintosh; Intel Mac OS X 10_15_7) AppleWebKit/537.36 (KHTML, like Gecko) Chrome/93.0.4577.63 Safari/537.36

Steps to reproduce:

Tests like [1] fail in Gecko. The css-contain spec[2] has been changed after the CSSWG resolution in [3] stopping propagation from body to viewport for non-none used containment on root and body.

[1] https://wpt.fyi/css/css-contain/contain-body-bg-001.html fail in Gecko.
[2] https://drafts.csswg.org/css-contain-1/#c3
[3] https://github.com/w3c/csswg-drafts/issues/5913

Actual results:

WPT tests failed

Expected results:

WPT tests passed

Comment 1

[BugBot [:suhaib / :marco/ :calixte]]

The Bugbug bot thinks this bug should belong to the 'Core::Layout' component, and is moving the bug to that component. Please revert this change in case you think the bot is wrong.

Comment 2

[Mike Taylor [:miketaylr]]

Hey Daniel! Does this seem like something Gecko would want to ship? Rune has sent an Intent to Ship for Chromium @ https://groups.google.com/a/chromium.org/g/blink-dev/c/LYuQvgjLhe0.

Comment 3

[Daniel Holbert [:dholbert]]

Sure, makes sense to ship this change. Hopefully I or somebody can get to it ~soon.

Comment 4

[Emilio Cobos Álvarez (:emilio)]

Attachment: Bug 1730763 - Fix containment and body-to-root propagation. r=dholbert

Comment 5

[Pulsebot]

Pushed by [e-mail]:
https://hg.mozilla.org/integration/autoland/rev/392445118046
Fix containment and body-to-root propagation. r=dholbert

Comment 6

[Pulsebot]

Pushed by [e-mail]:
https://hg.mozilla.org/integration/autoland/rev/350982d1a44d
Fix typo that causes some reftests to fail.

Comment 7

[Iulian Moraru]

Backed out for causing multiple reftest failures.

First push with failures
Push with the fix for the first batch of failures

Failure log for when it fails on layout/reftests/writing-mode/1102175-1a.html
Failure log for when it fails on layout/reftests/bidi/817406-4.html
Failure log for when it fails on layout/reftests/bugs/379461-3-container-xhtml.html
Failure log for wr job with fail on /css/css-backgrounds/background-color-body-propagation-009.html
Failure log for wr job on the push with the fix

Backout link

Comment 8

[Pulsebot]

Pushed by [e-mail]:
https://hg.mozilla.org/integration/autoland/rev/d70914c7f1f3
Fix containment and body-to-root propagation. r=dholbert

Comment 9

[Marian-Vasile Laza]

Backed out changeset d70914c7f1f3 (Bug 1730763) for causing web-platform reftest failures on direction-propagation-body-contain-root.html.
Backout link
Push with failures <--> Wr2
Failure Log

Comment 10

[Daniel Holbert [:dholbert]]

Looks like some more unexpected passes (hooray!), so there are just some more .ini files to remove, probably.

Comment 11

[Pulsebot]

Pushed by [e-mail]:
https://hg.mozilla.org/integration/autoland/rev/a5403b470ac6
Fix containment and body-to-root propagation. r=dholbert

Comment 12

[Natalia Csoregi [:nataliaCs]]

https://hg.mozilla.org/mozilla-central/rev/a5403b470ac6