зеркало из https://github.com/mozilla/gecko-dev.git
49 строки
1.4 KiB
C++
49 строки
1.4 KiB
C++
/* vim:set ts=2 sw=2 sts=2 et cindent: */
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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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#if !defined(BackgroundVideoDecodingPermissionObserver_h_)
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#define BackgroundVideoDecodingPermissionObserver_h_
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#include "nsIObserver.h"
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#include "nsISupportsImpl.h"
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class nsIDocument;
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class nsISupports;
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class nsPIDOMWindowOuter;
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namespace mozilla {
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class MediaDecoder;
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class BackgroundVideoDecodingPermissionObserver final
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: public nsIObserver
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{
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public:
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NS_DECL_ISUPPORTS
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explicit BackgroundVideoDecodingPermissionObserver(MediaDecoder* aDecoder);
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NS_IMETHOD Observe(nsISupports* aSubject, const char* aTopic,
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const char16_t* aData) override;
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void RegisterEvent();
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void UnregisterEvent();
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private:
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~BackgroundVideoDecodingPermissionObserver();
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void EnableEvent() const;
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void DisableEvent() const;
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already_AddRefed<nsPIDOMWindowOuter> GetOwnerWindow() const;
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nsIDocument* GetOwnerDoc() const;
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bool IsValidEventSender(nsISupports* aSubject) const;
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// The life cycle of observer would always be shorter than decoder, so we
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// use raw pointer here.
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MediaDecoder* mDecoder;
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bool mIsRegisteredForEvent;
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};
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} // namespace mozilla
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#endif // BackgroundVideoDecodingPermissionObserver_h_
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