text: /*
   * Copyright (c) 2020, Andreas Kling <kling@serenityos.org>
   * All rights reserved.
   *
   * Redistribution and use in source and binary forms, with or without
   * modification, are permitted provided that the following conditions are met:
   *
   * 1. Redistributions of source code must retain the above copyright notice, this
   *    list of conditions and the following disclaimer.
   *
   * 2. Redistributions in binary form must reproduce the above copyright notice,
   *    this list of conditions and the following disclaimer in the documentation
   *    and/or other materials provided with the distribution.
   *
   * THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS "AS IS"
   * AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
   * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE
   * DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT HOLDER OR CONTRIBUTORS BE LIABLE
   * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
   * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR
   * SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER
   * CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY,
   * OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE
   * OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
   */
  
  #pragma once
  
  #include <AK/FlyString.h>
  #include <AK/Noncopyable.h>
  #include <AK/Vector.h>
  #include <LibJS/Forward.h>
  #include <LibWeb/Forward.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(); }
  
      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;
      virtual Bindings::EventTargetWrapper* create_wrapper(JS::GlobalObject&) = 0;
  
      struct EventListenerRegistration {
          FlyString event_name;
          NonnullRefPtr<EventListener> listener;
      };
  
      const Vector<EventListenerRegistration>& listeners() const { return m_listeners; }
  
  protected:
      EventTarget();
  
      virtual void ref_event_target() = 0;
      virtual void unref_event_target() = 0;
  
  private:
      Vector<EventListenerRegistration> m_listeners;
  };
  
  }
  