Bug 1822323 - Add ToggleEvent interface for Popover. r=emilio

An implementation for https://html.spec.whatwg.org/multipage/popover.html#the-toggleevent-interface

Differential Revision: https://phabricator.services.mozilla.com/D172584

dom/webidl/ToggleEvent.webidl

@@ -0,0 +1,21 @@
+/* -*- Mode: IDL; tab-width: 2; indent-tabs-mode: nil; c-basic-offset: 2 -*- */
+/* 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/.
+ *
+ * The origin of this IDL file is
+ * https://html.spec.whatwg.org/multipage/popover.html#the-toggleevent-interface
+ */
+
+[Pref="dom.element.popover.enabled",
+ Exposed=Window]
+interface ToggleEvent : Event {
+    constructor(DOMString type, optional ToggleEventInit eventInitDict = {});
+    readonly attribute DOMString oldState;
+    readonly attribute DOMString newState;
+};
+
+dictionary ToggleEventInit : EventInit {
+    DOMString oldState = "";
+    DOMString newState = "";
+};

dom/webidl/moz.build

@@ -961,6 +961,7 @@ WEBIDL_FILES = [
     "TextTrackList.webidl",
     "TimeEvent.webidl",
     "TimeRanges.webidl",
+    "ToggleEvent.webidl",
     "Touch.webidl",
     "TouchEvent.webidl",
     "TouchList.webidl",
@@ -1186,6 +1187,7 @@ GENERATED_EVENTS_WEBIDL_FILES = [
     "TCPServerSocketEvent.webidl",
     "TCPSocketErrorEvent.webidl",
     "TCPSocketEvent.webidl",
+    "ToggleEvent.webidl",
     "TrackEvent.webidl",
     "UDPMessageEvent.webidl",
     "UserProximityEvent.webidl",

testing/web-platform/meta/html/semantics/popovers/toggleevent-interface.html.ini

@@ -1,111 +0,0 @@
-[toggleevent-interface.html]
-  [the event is an instance of ToggleEvent]
-    expected: FAIL
-
-  [the event inherts from Event]
-    expected: FAIL
-
-  [Missing type argument]
-    expected: FAIL
-
-  [type argument is string]
-    expected: FAIL
-
-  [type argument is null]
-    expected: FAIL
-
-  [event type set to undefined]
-    expected: FAIL
-
-  [oldState has default value of empty string]
-    expected: FAIL
-
-  [oldState is readonly]
-    expected: FAIL
-
-  [newState has default value of empty string]
-    expected: FAIL
-
-  [newState is readonly]
-    expected: FAIL
-
-  [ToggleEventInit argument is null]
-    expected: FAIL
-
-  [ToggleEventInit argument is undefined]
-    expected: FAIL
-
-  [ToggleEventInit argument is empty dictionary]
-    expected: FAIL
-
-  [oldState set to 'sample']
-    expected: FAIL
-
-  [oldState set to undefined]
-    expected: FAIL
-
-  [oldState set to null]
-    expected: FAIL
-
-  [oldState set to false]
-    expected: FAIL
-
-  [oldState set to true]
-    expected: FAIL
-
-  [oldState set to a number]
-    expected: FAIL
-
-  [oldState set to [\]]
-    expected: FAIL
-
-  [oldState set to [1, 2, 3\]]
-    expected: FAIL
-
-  [oldState set to an object]
-    expected: FAIL
-
-  [oldState set to an object with a valueOf function]
-    expected: FAIL
-
-  [ToggleEventInit properties set value]
-    expected: FAIL
-
-  [ToggleEventInit properties set value 2]
-    expected: FAIL
-
-  [ToggleEventInit properties set value 3]
-    expected: FAIL
-
-  [ToggleEventInit properties set value 4]
-    expected: FAIL
-
-  [newState set to 'sample']
-    expected: FAIL
-
-  [newState set to undefined]
-    expected: FAIL
-
-  [newState set to null]
-    expected: FAIL
-
-  [newState set to false]
-    expected: FAIL
-
-  [newState set to true]
-    expected: FAIL
-
-  [newState set to a number]
-    expected: FAIL
-
-  [newState set to [\]]
-    expected: FAIL
-
-  [newState set to [1, 2, 3\]]
-    expected: FAIL
-
-  [newState set to an object]
-    expected: FAIL
-
-  [newState set to an object with a valueOf function]
-    expected: FAIL