EventSourceEventService.h

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/* -*- Mode: C++; tab-width: 8; indent-tabs-mode: nil; c-basic-offset: 2 -*- */

/* vim: set ts=8 sts=2 et sw=2 tw=80: */

/* This Source Code Form is subject to the terms of the Mozilla Public

 * License, v. 2.0. If a copy of the MPL was not distributed with this

 * file, You can obtain one at http://mozilla.org/MPL/2.0/. */

#ifndef mozilla_dom_EventSourceEventService_h

#define mozilla_dom_EventSourceEventService_h

#include "mozilla/AlreadyAddRefed.h"

#include "mozilla/Atomics.h"

#include "nsIEventSourceEventService.h"

#include "nsCOMPtr.h"

#include "nsClassHashtable.h"

#include "nsHashKeys.h"

#include "nsIObserver.h"

#include "nsISupportsImpl.h"

#include "nsTArray.h"

namespace mozilla::dom {

class EventSourceEventService final : public nsIEventSourceEventService,

                                      public nsIObserver {

  friend class EventSourceBaseRunnable;

 public:

  NS_DECL_THREADSAFE_ISUPPORTS

  NS_DECL_NSIOBSERVER

  NS_DECL_NSIEVENTSOURCEEVENTSERVICE

  static already_AddRefed<EventSourceEventService> GetOrCreate();

  void EventSourceConnectionOpened(uint64_t aHttpChannelId,

                                   uint64_t aInnerWindowID);

  void EventSourceConnectionClosed(uint64_t aHttpChannelId,

                                   uint64_t aInnerWindowID);

  void EventReceived(uint64_t aHttpChannelId, uint64_t aInnerWindowID,

                     const nsAString& aEventName, const nsAString& aLastEventID,

                     const nsAString& aData, uint32_t aRetry,

                     DOMHighResTimeStamp aTimeStamp);

 private:

  EventSourceEventService();

  ~EventSourceEventService();

  bool HasListeners() const;

  void Shutdown();

  using EventSourceListeners = nsTArray<nsCOMPtr<nsIEventSourceEventListener>>;

  struct WindowListener {

    EventSourceListeners mListeners;

};

  void GetListeners(uint64_t aInnerWindowID,

                    EventSourceListeners& aListeners) const;

  // Used only on the main-thread.

  nsClassHashtable<nsUint64HashKey, WindowListener> mWindows;

  Atomic<uint64_t> mCountListeners;

};

}  // namespace mozilla::dom

/**

 * Casting EventSourceEventService to nsISupports is ambiguous.

 * This method handles that.

*/

inline nsISupports* ToSupports(mozilla::dom::EventSourceEventService* p) {

  return NS_ISUPPORTS_CAST(nsIEventSourceEventService*, p);

#endif  // mozilla_dom_EventSourceEventService_h