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LibWeb: Only allocate EventTarget listener/handler storage on demand

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This shaves 40 bytes off of all EventTargets that don't actually get
listeners or handlers attached (which is most of them).
This commit is contained in:
Andreas Kling 2023-11-18 11:15:08 +01:00
parent a71eaefdf6
commit c1fd55ce94
2 changed files with 54 additions and 27 deletions
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13
Userland/Libraries/LibWeb/DOM/EventTarget.h
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@ -68,11 +68,16 @@ protected:
virtual void visit_edges(Cell::Visitor&) override;
private:
Vector<JS::NonnullGCPtr<DOMEventListener>> m_event_listener_list;
struct Data {
Vector<JS::NonnullGCPtr<DOMEventListener>> event_listener_list;
// https://html.spec.whatwg.org/multipage/webappapis.html#event-handler-map
// Spec Note: The order of the entries of event handler map could be arbitrary. It is not observable through any algorithms that operate on the map.
HashMap<FlyString, JS::GCPtr<HTML::EventHandler>> m_event_handler_map;
// https://html.spec.whatwg.org/multipage/webappapis.html#event-handler-map
// Spec Note: The order of the entries of event handler map could be arbitrary. It is not observable through any algorithms that operate on the map.
HashMap<FlyString, JS::GCPtr<HTML::EventHandler>> event_handler_map;
};
Data& ensure_data();
OwnPtr<Data> m_data;
WebIDL::CallbackType* get_current_value_of_event_handler(FlyString const& name);
void activate_event_handler(FlyString const& name, HTML::EventHandler& event_handler);