1 files changed, 64 insertions, 0 deletions
diff --git a/dom/debugger/DebuggerNotificationManager.h b/dom/debugger/DebuggerNotificationManager.h
new file mode 100644
index 0000000000..6f46f777ae
--- /dev/null
+++ b/dom/debugger/DebuggerNotificationManager.h
@@ -0,0 +1,64 @@
+/* -*- 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_DebuggerNotificationManager_h
+#define mozilla_dom_DebuggerNotificationManager_h
+
+#include "DebuggerNotificationObserver.h"
+#include "nsCycleCollectionParticipant.h"
+#include "nsIGlobalObject.h"
+#include "nsISupports.h"
+#include "nsTObserverArray.h"
+
+namespace mozilla::dom {
+
+class DebuggerNotification;
+class DebuggerNotificationObserver;
+
+class DebuggerNotificationManager final : public nsISupports {
+ public:
+  NS_DECL_CYCLE_COLLECTING_ISUPPORTS
+  NS_DECL_CYCLE_COLLECTION_SCRIPT_HOLDER_CLASS(DebuggerNotificationManager)
+
+  static RefPtr<DebuggerNotificationManager> ForDispatch(
+      nsIGlobalObject* aDebuggeeGlobal) {
+    if (MOZ_UNLIKELY(!aDebuggeeGlobal)) {
+      return nullptr;
+    }
+    auto managerPtr = aDebuggeeGlobal->GetExistingDebuggerNotificationManager();
+    if (MOZ_LIKELY(!managerPtr) || !managerPtr->HasListeners()) {
+      return nullptr;
+    }
+
+    return managerPtr;
+  }
+
+  explicit DebuggerNotificationManager(nsIGlobalObject* aDebuggeeGlobal)
+      : mDebuggeeGlobal(aDebuggeeGlobal) {}
+
+  bool Attach(DebuggerNotificationObserver* aObserver);
+  bool Detach(DebuggerNotificationObserver* aObserver);
+
+  bool HasListeners();
+
+  template <typename T, typename... Args>
+  MOZ_CAN_RUN_SCRIPT void Dispatch(Args... aArgs) {
+    RefPtr<DebuggerNotification> notification(new T(mDebuggeeGlobal, aArgs...));
+    NotifyListeners(notification);
+  }
+
+ private:
+  ~DebuggerNotificationManager() = default;
+
+  MOZ_CAN_RUN_SCRIPT void NotifyListeners(DebuggerNotification* aNotification);
+
+  nsCOMPtr<nsIGlobalObject> mDebuggeeGlobal;
+  nsTObserverArray<RefPtr<DebuggerNotificationObserver>> mNotificationObservers;
+};
+
+}  // namespace mozilla::dom
+
+#endif  // mozilla_dom_DebuggerNotificationManager_h