1 files changed, 30 insertions, 0 deletions
diff --git a/dom/base/UIDirectionManager.h b/dom/base/UIDirectionManager.h
new file mode 100644
index 0000000000..2427b50116
--- /dev/null
+++ b/dom/base/UIDirectionManager.h
@@ -0,0 +1,30 @@
+/* -*- 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_UIDirectionManager_h
+#define mozilla_dom_UIDirectionManager_h
+
+#include "nsIObserver.h"
+
+namespace mozilla::dom {
+
+class UIDirectionManager final : public nsIObserver {
+ public:
+  NS_DECL_ISUPPORTS
+  NS_DECL_NSIOBSERVER
+
+  static void Initialize();
+  static void Shutdown();
+
+ private:
+  UIDirectionManager() = default;
+  virtual ~UIDirectionManager() = default;
+  static mozilla::StaticRefPtr<UIDirectionManager> gUIDirectionManager;
+};
+
+}  // namespace mozilla::dom
+
+#endif