Bug 1208371 - Add a generic PrincipalChangeObserver interface. r?mt draft
authorAndreas Pehrson <pehrsons@gmail.com>
Fri, 22 Jan 2016 11:57:23 +0800
changeset 342100 476f3891ead7c5cc065427d3ce0eefdb24eb3e12
parent 342099 2c66000b3727a25f0405abf8f339cfbe19c3f782
child 342101 1606934d08c354e2b51a69f9cfbf913ba5a5c829
push id13352
push userpehrsons@gmail.com
push dateFri, 18 Mar 2016 13:49:47 +0000
reviewersmt
bugs1208371
milestone47.0a1
Bug 1208371 - Add a generic PrincipalChangeObserver interface. r?mt MozReview-Commit-ID: EWCnH7jrKGN
dom/media/PrincipalChangeObserver.h
dom/media/moz.build
new file mode 100644
--- /dev/null
+++ b/dom/media/PrincipalChangeObserver.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_PRINCIPALCHANGEOBSERVER_H_
+#define MOZILLA_PRINCIPALCHANGEOBSERVER_H_
+
+namespace mozilla {
+namespace dom {
+
+/**
+ * A PrincipalChangeObserver for any type, but originating from DOMMediaStream,
+ * then expanded to MediaStreamTrack.
+ *
+ * Used to learn about dynamic changes to an object's principal.
+ * Operations relating to these observers must be confined to the main thread.
+ */
+template<typename T>
+class PrincipalChangeObserver
+{
+public:
+  virtual void PrincipalChanged(T* aArg) = 0;
+};
+
+} // namespace dom
+} // namespace mozilla
+
+#endif /* MOZILLA_PRINCIPALCHANGEOBSERVER_H_ */
--- a/dom/media/moz.build
+++ b/dom/media/moz.build
@@ -127,16 +127,17 @@ EXPORTS += [
     'MediaStreamGraph.h',
     'MediaTimer.h',
     'MediaTrack.h',
     'MediaTrackList.h',
     'MP3Decoder.h',
     'MP3Demuxer.h',
     'MP3FrameParser.h',
     'nsIDocumentActivity.h',
+    'PrincipalChangeObserver.h',
     'RtspMediaResource.h',
     'SeekTarget.h',
     'SelfRef.h',
     'SharedBuffer.h',
     'StreamBuffer.h',
     'ThreadPoolCOMListener.h',
     'TimeUnits.h',
     'TrackUnionStream.h',