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LibWeb: Make event dispatching spec-compliant

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Specification: https://dom.spec.whatwg.org/#concept-event-dispatch

This also introduces shadow roots due to it being a requirement of
the event dispatcher.

However, it does not introduce the full shadow DOM, that can be
left for future work.

This changes some event dispatches which require certain attributes
to be initialised to a value.
This commit is contained in:
Luke 2020-11-21 18:32:39 +00:00 • committed by Andreas Kling
parent 819f099a8e
commit e8b3a65581
32 changed files with 858 additions and 54 deletions
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16
Libraries/LibWeb/DOM/EventTarget.h
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@ -27,6 +27,7 @@
#pragma once
#include <AK/FlyString.h>
#include <AK/Function.h>
#include <AK/Noncopyable.h>
#include <AK/Vector.h>
#include <LibJS/Forward.h>
@ -47,10 +48,14 @@ public:
void add_event_listener(const FlyString& event_name, NonnullRefPtr<EventListener>);
void remove_event_listener(const FlyString& event_name, NonnullRefPtr<EventListener>);
virtual void dispatch_event(NonnullRefPtr<Event>) = 0;
void remove_from_event_listener_list(NonnullRefPtr<EventListener>);
virtual bool dispatch_event(NonnullRefPtr<Event>) = 0;
virtual Bindings::EventTargetWrapper* create_wrapper(JS::GlobalObject&) = 0;
Bindings::ScriptExecutionContext* script_execution_context() { return m_script_execution_context; }
virtual EventTarget* get_parent(const Event&) { return nullptr; }
struct EventListenerRegistration {
FlyString event_name;
NonnullRefPtr<EventListener> listener;
@ -58,6 +63,15 @@ public:
const Vector<EventListenerRegistration>& listeners() const { return m_listeners; }
virtual bool is_node() const { return false; }
virtual bool is_window() const { return false; }
Function<void(const Event&)> activation_behaviour;
// NOTE: These only exist for checkbox and radio input elements.
Function<void()> legacy_pre_activation_behaviour;
Function<void()> legacy_cancelled_activation_behaviour;
protected:
explicit EventTarget(Bindings::ScriptExecutionContext&);