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Support ::part selector (#37307)

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This is pretty much just wiring up the necessary stylo methods. Note
that the `exportparts` attribute is not yet supported, I'll do that in a
followup change

Testing: Covered by existing web platform tests.
This is the first half of https://github.com/servo/servo/issues/35349

Fixes https://github.com/servo/servo/issues/37325

---------

Signed-off-by: Simon Wülker <simon.wuelker@arcor.de>
This commit is contained in:
Simon Wülker 2025-06-09 12:17:28 +02:00 • committed by GitHub
parent 73ee36be00
commit 0fa3de3937
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36 changed files with 119 additions and 348 deletions
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7
components/script/dom/raredata.rs
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@ -11,6 +11,7 @@ use crate::dom::bindings::root::{Dom, MutNullableDom};
use crate::dom::customelementregistry::{
CustomElementDefinition, CustomElementReaction, CustomElementState,
};
use crate::dom::domtokenlist::DOMTokenList;
use crate::dom::elementinternals::ElementInternals;
use crate::dom::htmlslotelement::SlottableData;
use crate::dom::intersectionobserver::IntersectionObserverRegistration;
@ -76,4 +77,10 @@ pub(crate) struct ElementRareData {
/// > which is initialized to an empty list. This list holds IntersectionObserverRegistration records, which have:
pub(crate) registered_intersection_observers: Vec<IntersectionObserverRegistration>,
pub(crate) cryptographic_nonce: String,
/// <https://drafts.csswg.org/css-shadow-parts/#element-forwarded-part-name-list>
pub(crate) forwarded_part_names: Vec<(String, String)>,
/// <https://drafts.csswg.org/css-shadow-parts/#dom-element-part>
pub(crate) part: MutNullableDom<DOMTokenList>,
}