Bug 250506

Summary:	Update whitespace expectations for custom properties to match CSS Syntax Level 3 in some WPTs
Product:	WebKit	Reporter:	Antti Koivisto <koivisto>
Component:	CSS	Assignee:	Antti Koivisto <koivisto>
Status:	RESOLVED FIXED
Severity:	Normal	CC:	webkit-bug-importer
Priority:	P2	Keywords:	InRadar
Version:	WebKit Nightly Build
Hardware:	Unspecified
OS:	Unspecified
See Also:	https://github.com/web-platform-tests/wpt/pull/37923 https://bugs.webkit.org/show_bug.cgi?id=261546

Description Antti Koivisto 2023-01-12 02:58:35 PST

Tokenisation and parsing for whitespaces described in CSS Syntax Module Level 3 matches the current WebKit behavior in custom properties.
Some WPTs still have wrong expectations.

Both leading and trailing whitespaces should be stripped:

https://drafts.csswg.org/css-syntax/#consume-declaration

    2. While the next input token is a <whitespace-token>, consume the next input token.
    ...
    7. While the last token in decl’s value is a <whitespace-token>, remove that token."

Middle whitespaces collapse to a single <whitespace-token>:

https://drafts.csswg.org/css-syntax/#consume-token

    whitespace
    Consume as much whitespace as possible. Return a <whitespace-token>.

Comment 1 Radar WebKit Bug Importer 2023-01-12 02:59:46 PST

<rdar://problem/104162464>

Comment 2 Antti Koivisto 2023-01-12 07:08:22 PST

Pull request: https://github.com/WebKit/WebKit/pull/8573

Comment 3 Antti Koivisto 2023-01-12 22:43:52 PST

Submitted web-platform-tests pull request: https://github.com/web-platform-tests/wpt/pull/37923

Comment 4 EWS 2023-01-12 23:20:08 PST

Committed 258866@main (7a3b462e1d00): <https://commits.webkit.org/258866@main>

Reviewed commits have been landed. Closing PR #8573 and removing active labels.