Bug 249208

Summary:	[margin-trim] Implement margin-trim for flex containers
Product:	WebKit	Reporter:	Sammy Gill <sgill26>
Component:	Layout and Rendering	Assignee:	Sammy Gill <sgill26>
Status:	RESOLVED FIXED
Severity:	Normal	CC:	bfulgham, simon.fraser, webkit-bug-importer, zalan
Priority:	P2	Keywords:	InRadar
Version:	WebKit Nightly Build
Hardware:	Unspecified
OS:	Unspecified

Description Sammy Gill 2022-12-12 22:30:56 PST

For flex containers specifically, margin-trim discards

- the corresponding margin of each flex item on the closest flex line when trimming an edge parallel to the main axis
- the corresponding margin of the first/last flex item on each flex line when trimming an edge parallel to the cross axis
- This process ignores any collapsed flex items.

https://w3c.github.io/csswg-drafts/css-box-4/#margin-trim-flex

Comment 1 Radar WebKit Bug Importer 2022-12-12 22:31:19 PST

<rdar://problem/103285847>

Comment 2 Sammy Gill 2023-01-03 15:15:52 PST

Pull request: https://github.com/WebKit/WebKit/pull/8166

Comment 3 EWS 2023-01-06 14:43:10 PST

Committed 258563@main (0efe67f528eb): <https://commits.webkit.org/258563@main>

Reviewed commits have been landed. Closing PR #8166 and removing active labels.