tor-browser

The Tor Browser
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EventSourceEventService.h (2390B)

      1 /* -*- Mode: C++; tab-width: 8; indent-tabs-mode: nil; c-basic-offset: 2 -*- */
      2 /* vim: set ts=8 sts=2 et sw=2 tw=80: */
      3 /* This Source Code Form is subject to the terms of the Mozilla Public
      4 * License, v. 2.0. If a copy of the MPL was not distributed with this
      5 * file, You can obtain one at http://mozilla.org/MPL/2.0/. */
      6 
      7 #ifndef mozilla_dom_EventSourceEventService_h
      8 #define mozilla_dom_EventSourceEventService_h
      9 
     10 #include "mozilla/AlreadyAddRefed.h"
     11 #include "mozilla/Atomics.h"
     12 #include "nsCOMPtr.h"
     13 #include "nsClassHashtable.h"
     14 #include "nsHashKeys.h"
     15 #include "nsIEventSourceEventService.h"
     16 #include "nsIObserver.h"
     17 #include "nsISupportsImpl.h"
     18 #include "nsTArray.h"
     19 
     20 namespace mozilla::dom {
     21 
     22 class EventSourceEventService final : public nsIEventSourceEventService,
     23                                      public nsIObserver {
     24  friend class EventSourceBaseRunnable;
     25 
     26 public:
     27  NS_DECL_THREADSAFE_ISUPPORTS
     28  NS_DECL_NSIOBSERVER
     29  NS_DECL_NSIEVENTSOURCEEVENTSERVICE
     30 
     31  static already_AddRefed<EventSourceEventService> GetOrCreate();
     32 
     33  void EventSourceConnectionOpened(uint64_t aHttpChannelId,
     34                                   uint64_t aInnerWindowID);
     35 
     36  void EventSourceConnectionClosed(uint64_t aHttpChannelId,
     37                                   uint64_t aInnerWindowID);
     38 
     39  void EventReceived(uint64_t aHttpChannelId, uint64_t aInnerWindowID,
     40                     const nsAString& aEventName, const nsAString& aLastEventID,
     41                     const nsAString& aData, uint32_t aRetry,
     42                     DOMHighResTimeStamp aTimeStamp);
     43 
     44 private:
     45  EventSourceEventService();
     46  ~EventSourceEventService();
     47 
     48  bool HasListeners() const;
     49  void Shutdown();
     50 
     51  using EventSourceListeners = nsTArray<nsCOMPtr<nsIEventSourceEventListener>>;
     52 
     53  struct WindowListener {
     54    EventSourceListeners mListeners;
     55  };
     56 
     57  void GetListeners(uint64_t aInnerWindowID,
     58                    EventSourceListeners& aListeners) const;
     59 
     60  // Used only on the main-thread.
     61  nsClassHashtable<nsUint64HashKey, WindowListener> mWindows;
     62 
     63  Atomic<uint64_t> mCountListeners;
     64 };
     65 
     66 }  // namespace mozilla::dom
     67 
     68 /**
     69 * Casting EventSourceEventService to nsISupports is ambiguous.
     70 * This method handles that.
     71 */
     72 inline nsISupports* ToSupports(mozilla::dom::EventSourceEventService* p) {
     73  return NS_ISUPPORTS_CAST(nsIEventSourceEventService*, p);
     74 }
     75 
     76 #endif  // mozilla_dom_EventSourceEventService_h