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Make traverse_preorder follow children of shadow hosts (#35276)

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* Make traverse_preorder follow children of shadow hosts

Children of shadow hosts are not displayed, but they
still exist in the DOM and must be traversed.

Signed-off-by: Simon Wülker <simon.wuelker@arcor.de>

* Fix traverse_preorder over shadow roots

Signed-off-by: Simon Wülker <simon.wuelker@arcor.de>

* Update WPT expectations

Signed-off-by: Simon Wülker <simon.wuelker@arcor.de>

---------

Signed-off-by: Simon Wülker <simon.wuelker@arcor.de>
This commit is contained in:
Simon Wülker 2025-02-04 21:47:33 +01:00 • committed by GitHub
parent 3a75e1205b
commit aa09e2b88f
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17 changed files with 25 additions and 185 deletions
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10
components/script/dom/node.rs
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@ -1778,6 +1778,14 @@ impl TreeIterator {
self.current = Some(next_sibling);
return Some(current);
}
if let Some(shadow_root) = ancestor.downcast::<ShadowRoot>() {
// Shadow roots don't have sibling, so after we're done traversing
// one we jump to the first child of the host
if let Some(child) = shadow_root.Host().upcast::<Node>().GetFirstChild() {
self.current = Some(child);
return Some(current);
}
}
self.depth -= 1;
}
debug_assert_eq!(self.depth, 0);
@ -1801,8 +1809,6 @@ impl Iterator for TreeIterator {
self.current = Some(DomRoot::from_ref(shadow_root.upcast::<Node>()));
self.depth += 1;
return Some(current);
} else {
return self.next_skipping_children_impl(current);
}
}
}