script: Create CSSStyleOwner::Null for getComputedStyle (#36272)

This new `CSSStyleOwner` variant is used when the pseudo-element
argument fails to parse properly or is for some unknown or unsupported
pseudo-element.

Testing: There are tests for this change. Various tests start to pass
and some start to
fail. New failures are due to partial or fully missing support for
pseudo-elements such
as:
 - `::selection`
 - `::first-letter` and `::first-line`
 - `::marker`

Co-authored-by: Oriol Brufau <obrufau@igalia.com>
Signed-off-by: Martin Robinson <mrobinson@igalia.com>

Signed-off-by: Martin Robinson <mrobinson@igalia.com>
Co-authored-by: Oriol Brufau <obrufau@igalia.com>
This commit is contained in:
Martin Robinson 2025-04-02 15:54:42 +02:00 committed by GitHub
parent 1f13e8b596
commit 2ce306f450
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20 changed files with 171 additions and 219 deletions

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@ -13,54 +13,3 @@
[This pseudo-element should parse: ::highlight( n\\61me )]
expected: FAIL
[This pseudo-element should not parse: ::before(test)]
expected: FAIL
[This pseudo-element should not parse: ::highlight]
expected: FAIL
[This pseudo-element should not parse: ::highlight(]
expected: FAIL
[This pseudo-element should not parse: ::highlight()]
expected: FAIL
[This pseudo-element should not parse: ::highlight(1)]
expected: FAIL
[This pseudo-element should not parse: ::highlight($)]
expected: FAIL
[This pseudo-element should not parse: ::highlight (name)]
expected: FAIL
[This pseudo-element should not parse: ::highlight(name)a]
expected: FAIL
[This pseudo-element should not parse: ::view-transition-group(*)]
expected: FAIL
[This pseudo-element should not parse: :highlight(name)]
expected: FAIL
[This pseudo-element should not parse: ::view-transition-image-pair(*)]
expected: FAIL
[This pseudo-element should not parse: ::view-transition-old(*)]
expected: FAIL
[This pseudo-element should not parse: ::view-transition-new(*)]
expected: FAIL
[This pseudo-element should not parse: :view-transition-group(name)]
expected: FAIL
[This pseudo-element should not parse: :view-transition-image-pair(name)]
expected: FAIL
[This pseudo-element should not parse: :view-transition-old(name)]
expected: FAIL
[This pseudo-element should not parse: :view-transition-new(name)]
expected: FAIL