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LibWeb: Weakly store NamedNodeMap's & Attribute's associated Element

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This is similar to how Gecko avoids a reference cycle, where both the
NamedNodeMap and Attribute would otherwise store a strong reference to
their associated Element. Gecko manually clears stored raw references
when an Element is destroyed, whereas we use weak references to do so
automatically.

Attribute's ownerElement getter and setter are moved out of line to
avoid an #include cycle between Element and Attribute.
This commit is contained in:
Timothy Flynn 2021-10-17 15:09:47 -04:00 • committed by Andreas Kling
parent 356d5821e7
commit b67f6daf05
4 changed files with 35 additions and 8 deletions
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3
Userland/Libraries/LibWeb/DOM/NamedNodeMap.h
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@ -10,6 +10,7 @@
#include <AK/RefCounted.h>
#include <AK/String.h>
#include <AK/StringView.h>
#include <AK/WeakPtr.h>
#include <LibWeb/Bindings/Wrappable.h>
#include <LibWeb/DOM/ExceptionOr.h>
#include <LibWeb/Forward.h>
@ -50,7 +51,7 @@ public:
private:
explicit NamedNodeMap(Element const& associated_element);
Element const& m_associated_element;
WeakPtr<Element> m_associated_element;
NonnullRefPtrVector<Attribute> m_attributes;
};