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/* vim:set ts=2 sw=2 sts=2 et cindent: */
/* 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/. */
#if !defined(BackgroundVideoDecodingPermissionObserver_h_)
# define BackgroundVideoDecodingPermissionObserver_h_
# include "nsIObserver.h"
# include "nsISupportsImpl.h"
class nsISupports;
class nsPIDOMWindowOuter;
namespace mozilla {
namespace dom {
class Document;
class BrowsingContext;
} // namespace dom
class MediaDecoder;
class BackgroundVideoDecodingPermissionObserver final : public nsIObserver {
public:
NS_DECL_ISUPPORTS
explicit BackgroundVideoDecodingPermissionObserver(MediaDecoder* aDecoder);
NS_IMETHOD Observe(nsISupports* aSubject, const char* aTopic,
const char16_t* aData) override;
void RegisterEvent();
void UnregisterEvent();
private:
~BackgroundVideoDecodingPermissionObserver();
void EnableEvent() const;
void DisableEvent() const;
dom::BrowsingContext* GetOwnerBC() const;
dom::Document* GetOwnerDoc() const;
bool IsValidEventSender(nsISupports* aSubject) const;
// The life cycle of observer would always be shorter than decoder, so we
// use raw pointer here.
MediaDecoder* mDecoder;
bool mIsRegisteredForEvent;
};
} // namespace mozilla
#endif // BackgroundVideoDecodingPermissionObserver_h_