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LibWeb: Implement getting the traversable navigable of a navigable

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This commit is contained in:
Andreas Kling 2022-12-12 12:07:41 +01:00
parent 16ef5e2631
commit 05dc1da321
2 changed files with 17 additions and 0 deletions
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15
Userland/Libraries/LibWeb/HTML/Navigable.cpp
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@ -9,6 +9,7 @@
#include <LibWeb/HTML/DocumentState.h>
#include <LibWeb/HTML/Navigable.h>
#include <LibWeb/HTML/SessionHistoryEntry.h>
#include <LibWeb/HTML/TraversableNavigable.h>
namespace Web::HTML {
@ -80,4 +81,18 @@ void Navigable::set_container(JS::GCPtr<NavigableContainer> container)
m_container = container;
}
// https://html.spec.whatwg.org/multipage/document-sequences.html#nav-traversable
JS::GCPtr<TraversableNavigable> Navigable::traversable_navigable()
{
// 1. Let navigable be inputNavigable.
auto navigable = this;
// 2. While navigable is not a traversable navigable, set navigable to navigable's parent.
while (navigable && !is<TraversableNavigable>(*navigable))
navigable = navigable->parent();
// 3. Return navigable.
return static_cast<TraversableNavigable*>(navigable);
}
}