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/*
* Copyright (c) 2020, Andreas Kling <kling@serenityos.org>
*
* SPDX-License-Identifier: BSD-2-Clause
*/
#pragma once
#include <AK/FlyString.h>
#include <AK/Function.h>
#include <AK/Noncopyable.h>
#include <AK/Vector.h>
#include <LibJS/Forward.h>
#include <LibWeb/DOM/ExceptionOr.h>
#include <LibWeb/Forward.h>
#include <LibWeb/HTML/EventHandler.h>
namespace Web::DOM {
class EventTarget {
AK_MAKE_NONCOPYABLE(EventTarget);
AK_MAKE_NONMOVABLE(EventTarget);
public:
virtual ~EventTarget();
void ref() { ref_event_target(); }
void unref() { unref_event_target(); }
virtual bool is_focusable() const { return false; }
void add_event_listener(const FlyString& event_name, RefPtr<EventListener>);
void remove_event_listener(const FlyString& event_name, RefPtr<EventListener>);
void remove_from_event_listener_list(NonnullRefPtr<EventListener>);
virtual bool dispatch_event(NonnullRefPtr<Event>);
ExceptionOr<bool> dispatch_event_binding(NonnullRefPtr<Event>);
virtual JS::Object* create_wrapper(JS::GlobalObject&) = 0;
virtual EventTarget* get_parent(const Event&) { return nullptr; }
struct EventListenerRegistration {
FlyString event_name;
NonnullRefPtr<EventListener> listener;
};
Vector<EventListenerRegistration>& listeners() { return m_listeners; }
const Vector<EventListenerRegistration>& listeners() const { return m_listeners; }
Function<void(const Event&)> activation_behavior;
// NOTE: These only exist for checkbox and radio input elements.
Function<void()> legacy_pre_activation_behavior;
Function<void()> legacy_cancelled_activation_behavior;
Bindings::CallbackType* event_handler_attribute(FlyString const& name);
void set_event_handler_attribute(FlyString const& name, Optional<Bindings::CallbackType>);
protected:
EventTarget();
virtual void ref_event_target() = 0;
virtual void unref_event_target() = 0;
void element_event_handler_attribute_changed(FlyString const& local_name, String const& value);
private:
Vector<EventListenerRegistration> m_listeners;
// 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, HTML::EventHandler> m_event_handler_map;
enum class IsAttribute {
No,
Yes,
};
Bindings::CallbackType* get_current_value_of_event_handler(FlyString const& name);
void activate_event_handler(FlyString const& name, HTML::EventHandler& event_handler, IsAttribute is_attribute);
void deactivate_event_handler(FlyString const& name);
JS::ThrowCompletionOr<void> process_event_handler_for_event(FlyString const& name, Event& event);
};
}
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