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LibWeb: Use a WeakPtr for DocumentFragment's "host" field

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We had a reference cycle between fragments and their hosts.
This commit is contained in:
Andreas Kling 2022-03-14 12:46:14 +01:00
parent 7a82a6dfe8
commit fdb647c097
2 changed files with 12 additions and 4 deletions
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7
Userland/Libraries/LibWeb/DOM/DocumentFragment.h
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@ -26,13 +26,14 @@ public:
virtual FlyString node_name() const override { return "#document-fragment"; }
RefPtr<Element> host() { return m_host; }
const RefPtr<Element> host() const { return m_host; }
Element* host() { return m_host; }
Element const* host() const { return m_host; }
void set_host(Element& host) { m_host = host; }
private:
RefPtr<Element> m_host;
// https://dom.spec.whatwg.org/#concept-documentfragment-host
WeakPtr<Element> m_host;
};
}

9
Userland/Libraries/LibWeb/DOM/Node.cpp
View file

@ -701,7 +701,14 @@ u16 Node::compare_document_position(RefPtr<Node> other)
// https://dom.spec.whatwg.org/#concept-tree-host-including-inclusive-ancestor
bool Node::is_host_including_inclusive_ancestor_of(const Node& other) const
{
return is_inclusive_ancestor_of(other) || (is<DocumentFragment>(other.root()) && verify_cast<DocumentFragment>(other.root()).host() && is_inclusive_ancestor_of(*verify_cast<DocumentFragment>(other.root()).host().ptr()));
if (is_inclusive_ancestor_of(other))
return true;
if (is<DocumentFragment>(other.root())
&& static_cast<DocumentFragment const&>(other.root()).host()
&& is_inclusive_ancestor_of(*static_cast<DocumentFragment const&>(other.root()).host())) {
return true;
}
return false;
}
// https://dom.spec.whatwg.org/#dom-node-ownerdocument