dom/debugger/DebuggerNotificationManager.h

   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_DebuggerNotificationManager_h
   8 #define mozilla_dom_DebuggerNotificationManager_h
   9
  10 #include "DebuggerNotificationObserver.h"
  11 #include "nsCycleCollectionParticipant.h"
  12 #include "nsIGlobalObject.h"
  13 #include "nsISupports.h"
  14 #include "nsTObserverArray.h"
  15
  16 namespace mozilla::dom {
  17
  18 class DebuggerNotification;
  19 class DebuggerNotificationObserver;
  20
  21 class DebuggerNotificationManager final : public nsISupports {
  22  public:
  23   NS_DECL_CYCLE_COLLECTING_ISUPPORTS
  24   NS_DECL_CYCLE_COLLECTION_SCRIPT_HOLDER_CLASS(DebuggerNotificationManager)
  25
  26   static RefPtr<DebuggerNotificationManager> ForDispatch(
  27       nsIGlobalObject* aDebuggeeGlobal) {
  28     if (MOZ_UNLIKELY(!aDebuggeeGlobal)) {
  29       return nullptr;
  30     }
  31     auto managerPtr = aDebuggeeGlobal->GetExistingDebuggerNotificationManager();
  32     if (MOZ_LIKELY(!managerPtr) || !managerPtr->HasListeners()) {
  33       return nullptr;
  34     }
  35
  36     return managerPtr;
  37   }
  38
  39   explicit DebuggerNotificationManager(nsIGlobalObject* aDebuggeeGlobal)
  40       : mDebuggeeGlobal(aDebuggeeGlobal) {}
  41
  42   bool Attach(DebuggerNotificationObserver* aObserver);
  43   bool Detach(DebuggerNotificationObserver* aObserver);
  44
  45   bool HasListeners();
  46
  47   template <typename T, typename... Args>
  48   MOZ_CAN_RUN_SCRIPT void Dispatch(Args... aArgs) {
  49     RefPtr<DebuggerNotification> notification(new T(mDebuggeeGlobal, aArgs...));
  50     NotifyListeners(notification);
  51   }
  52
  53  private:
  54   ~DebuggerNotificationManager() = default;
  55
  56   MOZ_CAN_RUN_SCRIPT void NotifyListeners(DebuggerNotification* aNotification);
  57
  58   nsCOMPtr<nsIGlobalObject> mDebuggeeGlobal;
  59   nsTObserverArray<RefPtr<DebuggerNotificationObserver>> mNotificationObservers;
  60 };
  61
  62 }  // namespace mozilla::dom
  63
  64 #endif  // mozilla_dom_DebuggerNotificationManager_h