Bug 249781

Summary:	[margin-trim] margin trim should discard margins that are collapsed with trimmed margins
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 2022-12-22 09:33:35 PST

Note the final bullet point from the block container portion of the spec: 

For block containers specifically, margin-trim discards:

- The block-start margin of a block-level first child, when trimming at the block-start edge.
- The block-end margin of a block-level last child, when trimming at the block-end edge.
- Any margin collapsed with these margins.

Comment 1 Radar WebKit Bug Importer 2022-12-22 09:33:56 PST

<rdar://problem/103640784>

Comment 2 Sammy Gill 2023-01-24 17:00:10 PST

Pull request: https://github.com/WebKit/WebKit/pull/9085

Comment 3 EWS 2023-02-01 21:55:16 PST

Committed 259734@main (82ef68207e2f): <https://commits.webkit.org/259734@main>

Reviewed commits have been landed. Closing PR #9085 and removing active labels.