Bug 1942630, part 1 - Navigation API: Move UserNavigationInvolvement into its own header file. r=farre

Additionally, the enum values are now sorted
by 'severity' (0=None, 1=Activation, 2=BrowserUI).

Differential Revision: https://phabricator.services.mozilla.com/D234850

Author: jnjaeschke

dom/navigation/Navigation.h

@@ -20,10 +20,6 @@ struct NavigationUpdateCurrentEntryOptions;
 struct NavigationReloadOptions;
 struct NavigationResult;
 
-// See https://bugzilla.mozilla.org/show_bug.cgi?id=1903552.
-// https://html.spec.whatwg.org/multipage/browsing-the-web.html#user-navigation-involvement
-enum class UserNavigationInvolvement : uint8_t { BrowserUI, Activation, None };
-
 class Navigation final : public DOMEventTargetHelper {
  public:
   NS_DECL_ISUPPORTS_INHERITED

dom/navigation/UserNavigationInvolvement.h

@@ -0,0 +1,21 @@
+/* -*- Mode: C++; tab-width: 2; indent-tabs-mode: nil; c-basic-offset: 2 -*- */
+/* vim: set ts=2 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_UserNavigationInvolvement_h___
+#define mozilla_dom_UserNavigationInvolvement_h___
+#include <cstdint>
+namespace mozilla::dom {
+
+// See https://bugzilla.mozilla.org/show_bug.cgi?id=1903552.
+// https://html.spec.whatwg.org/#user-navigation-involvement
+enum class UserNavigationInvolvement : uint8_t {
+  None = 0,
+  Activation = 1,
+  BrowserUI = 2
+};
+}  // namespace mozilla::dom
+
+#endif

dom/navigation/moz.build

@@ -13,6 +13,7 @@ EXPORTS.mozilla.dom += [
     "NavigationDestination.h",
     "NavigationHistoryEntry.h",
     "NavigationTransition.h",
+    "UserNavigationInvolvement.h",
 ]
 
 UNIFIED_SOURCES += [