Bug 1258600 - Part1: Add PresentationConnectionClosedEvent, r=smaug

dom/webidl/PresentationConnectionClosedEvent.webidl

@@ -0,0 +1,39 @@
+/* -*- 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/.
+ */
+
+enum PresentationConnectionClosedReason
+{
+  // The communication encountered an unrecoverable error.
+  "error",
+
+  // |PresentationConnection.close()| is called by controlling browsing context
+  // or the receiving browsing context.
+  "closed",
+
+  // The connection is closed because the destination browsing context
+  // that owned the connection navigated or was discarded.
+  "wentaway"
+};
+
+[Constructor(DOMString type,
+             PresentationConnectionClosedEventInit eventInitDict),
+ Pref="dom.presentation.enabled",
+ Func="Navigator::HasPresentationSupport"]
+interface PresentationConnectionClosedEvent : Event
+{
+  readonly attribute PresentationConnectionClosedReason reason;
+
+  // The message is a human readable description of
+  // how the communication channel encountered an error.
+  // It is empty when the closed reason is closed or wentaway.
+  readonly attribute DOMString message;
+};
+
+dictionary PresentationConnectionClosedEventInit : EventInit
+{
+  required PresentationConnectionClosedReason reason;
+  DOMString message = "";
+};

dom/webidl/moz.build

@@ -803,6 +803,7 @@ GENERATED_EVENTS_WEBIDL_FILES = [
     'PopStateEvent.webidl',
     'PopupBlockedEvent.webidl',
     'PresentationConnectionAvailableEvent.webidl',
+    'PresentationConnectionClosedEvent.webidl',
     'ProgressEvent.webidl',
     'RecordErrorEvent.webidl',
     'ScrollViewChangeEvent.webidl',