Bug 251154

Summary:	[margin-trim] Add margin-trim support for floats in IFC line layout
Product:	WebKit	Reporter:	Sammy Gill <sgill26>
Component:	Layout and Rendering	Assignee:	Sammy Gill <sgill26>
Status:	RESOLVED WORKSFORME
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 2023-01-25 09:26:58 PST

It also affects floats for which the block container is a containing block by:

- Discarding the block-start margin of any float whose block-start outer edge coincides with the block-start inner edge of the container.
- Discarding the inline-start/inline-end margin of an inline-start/inline-end float (or equivalent) whose outer edge on that side coincides with the inner edge of the container.
- Zeroing the inline-axis margins of a float for the purpose of calculating its intrinsic size contributions or its size in the containerÃ¢ÂÂs inline axis.
- Trimming the block-end margins of a float to the extent necessary to prevent such a margin from extending the block size of a block formatting context root.

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

Comment 1 Radar WebKit Bug Importer 2023-01-25 09:27:49 PST

<rdar://problem/104650698>

Comment 2 Sammy Gill 2023-01-25 13:22:50 PST

Pull request: https://github.com/WebKit/WebKit/pull/9145

Comment 3 Sammy Gill 2023-10-17 09:59:05 PDT

This part of the spec was removed by the CSSWG and will potentially be explored later in a future version of the spec. As a result, this issue no longer applies.