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31 lines
926 B
C
31 lines
926 B
C
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/* -*- Mode: C++; tab-width: 8; indent-tabs-mode: nil; c-basic-offset: 2 -*- */
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/* vim: set ts=8 sts=2 et sw=2 tw=80: */
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/* This Source Code Form is subject to the terms of the Mozilla Public
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* License, v. 2.0. If a copy of the MPL was not distributed with this
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* file, You can obtain one at http://mozilla.org/MPL/2.0/. */
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#ifndef MOZILLA_PRINCIPALCHANGEOBSERVER_H_
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#define MOZILLA_PRINCIPALCHANGEOBSERVER_H_
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namespace mozilla {
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namespace dom {
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/**
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* A PrincipalChangeObserver for any type, but originating from DOMMediaStream,
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* then expanded to MediaStreamTrack.
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*
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* Used to learn about dynamic changes to an object's principal.
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* Operations relating to these observers must be confined to the main thread.
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*/
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template<typename T>
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class PrincipalChangeObserver
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{
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public:
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virtual void PrincipalChanged(T* aArg) = 0;
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};
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} // namespace dom
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} // namespace mozilla
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#endif /* MOZILLA_PRINCIPALCHANGEOBSERVER_H_ */
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