Property invalidation inside :nth-child(... of ...) used to become a
whole-subtree invalidation plan. That is broader than needed for
property changes that only affect the filtered sibling list, such as
:has() becoming true or false for one sibling.
Add an invalidation plan bit that marks the element and structurally
affected siblings instead. Keep whole-subtree invalidation when a
stronger plan already requires it, and cover both :nth-child and
:nth-last-child filters with :has() regression tests.
Compound selectors with a non-rightmost pseudo-class used to register
their descendant and sibling invalidation plans directly under the
pseudo-class property. A selector like `.item:hover * .target` ran
the descendant plan for every hovered element, even when that element
could not match `.item`.
Store those non-rightmost plans behind a guard made from stable class
and id subject features in the same compound selector. Deliberately
leave pseudo-classes out of guards, since one mutation can change
multiple state pseudo-classes at once. Also leave tag and attribute
selectors out, since their matching depends on document and namespace
case-sensitivity that the guard property does not carry.
The new style-invalidation test covers the GitHub-shaped
`:hover * :not(...)` case, co-invalidated `:link` and `:any-link`,
partial or complex `:is()`/`:where()` alternatives, and case-sensitive
SVG tag and attribute selectors.
StyleInvalidator applies CSS invalidation plans and matches selector
features while walking DOM nodes. Move the class from DOM into the
CSS::Invalidation namespace alongside the other invalidation helpers.
Document still owns the invalidator and DOM nodes still expose the state
that gets marked, but the policy for applying invalidation plans now has
a home with the rest of the CSS invalidation code.
2026-04-29 15:47:23 +02:00
Renamed from Libraries/LibWeb/DOM/StyleInvalidator.cpp (Browse further)
