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LibWeb: Implement getting the top-level traversable of a navigable

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This commit is contained in:
Andreas Kling 2022-12-12 12:17:46 +01:00
parent 05dc1da321
commit 54e01824c7
2 changed files with 15 additions and 0 deletions
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14
Userland/Libraries/LibWeb/HTML/Navigable.cpp
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@ -95,4 +95,18 @@ JS::GCPtr<TraversableNavigable> Navigable::traversable_navigable()
return static_cast<TraversableNavigable*>(navigable);
}
// https://html.spec.whatwg.org/multipage/document-sequences.html#nav-top
JS::GCPtr<TraversableNavigable> Navigable::top_level_traversable()
{
// 1. Let navigable be inputNavigable.
auto navigable = this;
// 2. While navigable's parent is not null, set navigable to navigable's parent.
while (navigable->parent())
navigable = navigable->parent();
// 3. Return navigable.
return verify_cast<TraversableNavigable>(navigable);
}
}