Bug 284895 – [css-values-5] Implement ident() arbitrary substitution function

• Status: RESOLVED
• Resolution: FIXED
• Component: CSS

[Bramus]

See resolution at https://github.com/w3c/csswg-drafts/issues/9141#issuecomment-2551910531

(Filing this to have _something_ to track, spec-work still needs to be done)

[Radar WebKit Bug Importer]

<rdar://problem/142034342>

[Bramus]

The spec edits are in: https://drafts.csswg.org/css-values-5/#ident

There still is the open issue of https://github.com/w3c/csswg-drafts/issues/11424 which I would like to resolve on soon (at the upcoming CSSWG F2F, preferably).

[saku]

Pull request: https://github.com/WebKit/WebKit/pull/59674

[saku]

This patch implements the most foundational part of the ident() function, enabling ident() in view-transition-name (which is covered by ident-function-parsing/computed WPT) for now.

Known follow-ups:
- [ ] [`anchor-name` / `anchor-scope` / `position-anchor`](https://wpt.fyi/results/css/css-anchor-position/anchor-ident-function.html)
- [ ] [`animation-timeline` / `scroll-timeline-name` / `view-timeline-name` / `timeline-scope`](https://wpt.fyi/results/scroll-animations/css/timeline-names-ident-function.html)
- [ ] [`container-name` / `container`](https://wpt.fyi/results/css/css-conditional/container-queries/container-ident-function.html)
- [ ] [`position-try-fallbacks` / `position-try`](https://wpt.fyi/results/css/css-anchor-position/position-try-ident-function.html)
- [ ] [registered custom properties (`@property` with `syntax: "<custom-ident>"`)](https://wpt.fyi/results/css/css-properties-values-api/registered-property-ident-function.html)
- [ ] [`var()` integration cases using `ident()`](https://wpt.fyi/results/css/css-variables/var-ident-function.html)

[saku]

Pull request: https://github.com/WebKit/WebKit/pull/67308

[saku]

Pull request: https://github.com/WebKit/WebKit/pull/67336

[EWS]

Committed 315374@main (0f653a073008): <https://commits.webkit.org/315374@main>

Reviewed commits have been landed. Closing PR #67308 and removing active labels.

[EWS]

Committed 316524@main (7f655a4e9f5d): <https://commits.webkit.org/316524@main>

Reviewed commits have been landed. Closing PR #67336 and removing active labels.

Reopened Bugzilla.
No longer correct after new CSSWG resolution, tracking revert in https://bugs.webkit.org/show_bug.cgi?id=321431.

[Antti Koivisto]

Pull request: https://github.com/WebKit/WebKit/pull/71301

[EWS]

Committed 318987@main (004cb05ad8d1): <https://commits.webkit.org/318987@main>

Reviewed commits have been landed. Closing PR #71301 and removing active labels.

[Antti Koivisto]

Submitted web-platform-tests pull request: https://github.com/web-platform-tests/wpt/pull/61877