chromium/extensions/renderer/bindings/listener_tracker.h

// Copyright 2018 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_RENDERER_BINDINGS_LISTENER_TRACKER_H_
#define EXTENSIONS_RENDERER_BINDINGS_LISTENER_TRACKER_H_

#include <map>
#include <memory>
#include <string>
#include <utility>

#include "base/values.h"
#include "extensions/common/event_filter.h"
#include "extensions/common/mojom/event_dispatcher.mojom-forward.h"

namespace extensions {
class EventFilter;
class ValueCounter;

// A class to track all event listeners across multiple v8::Contexts. Each
// context has a "context owner", which may be the same across multiple
// contexts. For instance, an extension may listen to the same event in
// multiple pages. Since these contexts may have the same context owner,
// tracking when a new listener is added requires looking at more than a
// single context.
//
// TODO(devlin): We should incorporate the notifications for newly added/
// removed listeners into this class, rather than having callers worry about
// it based on return values.
class ListenerTracker { … };

}  // namespace extensions

#endif  // EXTENSIONS_RENDERER_BINDINGS_LISTENER_TRACKER_H_