Andreas Kling eed76b3619 LibWeb: Track rule scope outside MatchingRule ...

Keep cached MatchingRule entries independent from the shadow root that
owns the rule cache. Thread the effective rule shadow root through style
matching as transient state instead, so a rule cache can later be shared
by multiple scopes without copying every cached rule.

This preserves the existing matching behavior by deriving the effective
rule root from each cache lookup site. Pseudo-class invalidation already
operates on a single style scope, so it no longer needs a per-rule scope
filter.

2026-04-28 13:07:52 +02:00

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