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Turn CSSStyleRule into a CSSGroupingRule subclass (#36254)

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Note that `StyleRule` may not have the `CssRules` readily available,
they may need to be created. So the previous approach of providing
`CSSGroupingRule` with the `CssRules` is no good: it would require
writing them in advance, just in case they end up being used.

Therefore, this removes the `CSSGroupingRule::rules` field. Instead,
they are lazily obtained in `CSSGroupingRule::rulelist()` by downcasting
and calling the appropriate method for the subclass.

Testing: covered by WPT
Fixes: #36245

Signed-off-by: Oriol Brufau <obrufau@igalia.com>
This commit is contained in:
Oriol Brufau 2025-04-01 12:18:07 -07:00 • committed by GitHub
parent dba8a0c22c
commit 0cdc1dcf72
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8 changed files with 83 additions and 76 deletions
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2
components/script_bindings/webidls/CSSStyleRule.webidl
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@ -4,7 +4,7 @@
// https://drafts.csswg.org/cssom/#the-cssstylerule-interface
[Exposed=Window]
interface CSSStyleRule : CSSRule {
interface CSSStyleRule : CSSGroupingRule {
attribute DOMString selectorText;
[SameObject, PutForwards=cssText] readonly attribute CSSStyleDeclaration style;
};