chromium/extensions/browser/event_listener_map.h

// Copyright 2013 The Chromium Authors
// Use of this source code is governed by a BSD-style license that can be
// found in the LICENSE file.

#ifndef EXTENSIONS_BROWSER_EVENT_LISTENER_MAP_H_
#define EXTENSIONS_BROWSER_EVENT_LISTENER_MAP_H_

#include <map>
#include <memory>
#include <optional>
#include <set>
#include <string>
#include <vector>

#include "base/containers/flat_map.h"
#include "base/memory/raw_ptr.h"
#include "base/values.h"
#include "extensions/common/event_filter.h"
#include "extensions/common/extension_id.h"
#include "third_party/blink/public/mojom/service_worker/service_worker_database.mojom-forward.h"
#include "url/gurl.h"

namespace content {
class BrowserContext;
class RenderProcessHost;
}

namespace extensions {
struct Event;

// A listener for an extension event. A listener is essentially an endpoint
// that an event can be dispatched to.
//
// This is a lazy listener if |IsLazy| is returns true, and a filtered listener
// if |filter| is defined.
//
// A lazy listener is added to an event to indicate that a lazy background page
// is listening to the event. It is associated with no process, so to dispatch
// an event to a lazy listener one must start a process running the associated
// extension and dispatch the event to that.
class EventListener { … };

// Holds listeners for extension events and can answer questions about which
// listeners are interested in what events.
class EventListenerMap { … };

}  // namespace extensions

#endif  // EXTENSIONS_BROWSER_EVENT_LISTENER_MAP_H_