1 files changed, 45 insertions, 0 deletions
diff --git a/dom/permission/PermissionObserver.h b/dom/permission/PermissionObserver.h
new file mode 100644
index 0000000000..cc085cc51b
--- /dev/null
+++ b/dom/permission/PermissionObserver.h
@@ -0,0 +1,45 @@
+/* -*- 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_PermissionObserver_h_
+#define mozilla_dom_PermissionObserver_h_
+
+#include "mozilla/dom/PermissionsBinding.h"
+
+#include "nsIObserver.h"
+#include "nsIPrincipal.h"
+#include "nsTArray.h"
+#include "nsWeakReference.h"
+
+namespace mozilla::dom {
+
+class PermissionStatus;
+
+// Singleton that watches for perm-changed notifications in order to notify
+// PermissionStatus objects.
+class PermissionObserver final : public nsIObserver,
+                                 public nsSupportsWeakReference {
+ public:
+  NS_DECL_ISUPPORTS
+  NS_DECL_NSIOBSERVER
+
+  static already_AddRefed<PermissionObserver> GetInstance();
+
+  void AddSink(PermissionStatus* aObs);
+  void RemoveSink(PermissionStatus* aObs);
+
+ private:
+  PermissionObserver();
+  virtual ~PermissionObserver();
+
+  void Notify(PermissionName aName, nsIPrincipal& aPrincipal);
+
+  nsTArray<PermissionStatus*> mSinks;
+};
+
+}  // namespace mozilla::dom
+
+#endif