Issue #1655: Update MediaQueryList to the current draft spec.

This make MediaQueryList inherit from EventTarget and adds MediaQueryListEvent
as an interface as well as the onchange() method.
This should not affect compatibility with other code; the event object is a
MediaQueryListEvent instance, which is recognized as a MediaListQuery instance.

4 files changed, 30 insertions, 7 deletions

diff --git a/dom/base/nsDocument.cpp b/dom/base/nsDocument.cpp
index 5bf89f26ae..3c427704f3 100644
--- a/dom/base/nsDocument.cpp
+++ b/dom/base/nsDocument.cpp
@@ -1785,7 +1785,7 @@ NS_IMPL_CYCLE_COLLECTION_UNLINK_BEGIN(nsDocument)
        l != &tmp->mDOMMediaQueryLists; ) {
     PRCList *next = PR_NEXT_LINK(l);
     MediaQueryList *mql = static_cast<MediaQueryList*>(l);
-    mql->RemoveAllListeners();
+    mql->Disconnect();
     l = next;
   }
 
diff --git a/dom/webidl/MediaQueryList.webidl b/dom/webidl/MediaQueryList.webidl
index 519ddb0e52..af641a2685 100644
--- a/dom/webidl/MediaQueryList.webidl
+++ b/dom/webidl/MediaQueryList.webidl
@@ -4,17 +4,21 @@
  * file, You can obtain one at http://mozilla.org/MPL/2.0/.
  *
  * The origin of this IDL file is
- * http://dev.w3.org/csswg/cssom-view/#the-mediaquerylist-interface
+ * https://drafts.csswg.org/cssom-view/#mediaquerylist
  *
  * Copyright © 2012 W3C® (MIT, ERCIM, Keio), All Rights Reserved. W3C
  * liability, trademark and document use rules apply.
  */
 
-interface MediaQueryList {
+interface MediaQueryList : EventTarget {
   readonly attribute DOMString media;
   readonly attribute boolean matches;
-  void addListener(MediaQueryListListener listener);
-  void removeListener(MediaQueryListListener listener);
-};
 
-callback MediaQueryListListener = void (MediaQueryList list);
+  [Throws]
+  void addListener(EventListener? listener);
+
+  [Throws]
+  void removeListener(EventListener? listener);
+
+           attribute EventHandler onchange;
+};
diff --git a/dom/webidl/MediaQueryListEvent.webidl b/dom/webidl/MediaQueryListEvent.webidl
new file mode 100644
index 0000000000..f3a66fb57f
--- /dev/null
+++ b/dom/webidl/MediaQueryListEvent.webidl
@@ -0,0 +1,18 @@
+/* -*- 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/.

+ *

+ * https://drafts.csswg.org/cssom-view/#mediaquerylistevent

+ */

+

+[Constructor(DOMString type, optional MediaQueryListEventInit eventInitDict)]

+interface MediaQueryListEvent : Event {

+  readonly attribute DOMString media;

+  readonly attribute boolean matches;

+};

+

+dictionary MediaQueryListEventInit : EventInit {

+  DOMString media = "";

+  boolean matches = false;

+};

diff --git a/dom/webidl/moz.build b/dom/webidl/moz.build
index 7dc30a897f..041969fdd0 100644
--- a/dom/webidl/moz.build
+++ b/dom/webidl/moz.build
@@ -681,6 +681,7 @@ GENERATED_EVENTS_WEBIDL_FILES = [
     'HashChangeEvent.webidl',
     'HiddenPluginEvent.webidl',
     'ImageCaptureErrorEvent.webidl',
+    'MediaQueryListEvent.webidl',
     'MediaStreamEvent.webidl',
     'MediaStreamTrackEvent.webidl',
     'MozSettingsEvent.webidl',