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/* -*- Mode: C++; tab-width: 2; indent-tabs-mode: nil; c-basic-offset: 2 -*- */
/* 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/. */
#ifndef DOM_MEDIA_EME_MEDIAKEYSYSTEMACCESSPERMISSIONREQUEST_H_
#define DOM_MEDIA_EME_MEDIAKEYSYSTEMACCESSPERMISSIONREQUEST_H_
#include "mozilla/MozPromise.h"
#include "nsContentPermissionHelper.h"
class nsGlobalWindowInner;
namespace mozilla {
namespace dom {
/**
* This class encapsulates a permission request to allow media key system
* access. The intention is not for this class to be used in all cases of EME,
* but only when we need to seek explicit approval from an application using
* Gecko, such as an application embedding via GeckoView.
*
* media.eme.require-app-approval should be used to gate this functionality in
* gecko code, and is also used as the testing pref for
* ContentPermissionRequestBase. I.e. CheckPromptPrefs() will respond to having
* `media.eme.require-app-approval.prompt.testing` and
* `media.eme.require-app-approval.prompt.testing.allow` being set to true or
* false and will return an appropriate value to allow for test code to short
* circuit showing a prompt. Note that the code using this class needs to call
* CheckPromptPrefs and implement test specific logic, it is *not* handled by
* this class or ContentPermissionRequestBase.
*
* Expects to be used on main thread as ContentPermissionRequestBase uses
* PContentPermissionRequest which is managed by PContent which is main thread
* to main thread communication.
*/
class MediaKeySystemAccessPermissionRequest
: public ContentPermissionRequestBase {
public:
NS_DECL_ISUPPORTS_INHERITED
NS_DECL_CYCLE_COLLECTION_CLASS_INHERITED(
MediaKeySystemAccessPermissionRequest, ContentPermissionRequestBase)
using RequestPromise = MozPromise<bool, bool, true /* IsExclusive*/>;
// Create a MediaKeySystemAccessPermissionRequest.
// @param aWindow The window associated with this request.
static already_AddRefed<MediaKeySystemAccessPermissionRequest> Create(
nsPIDOMWindowInner* aWindow);
// Returns a promise that will be resolved if this request is allowed or
// rejected in the case the request is denied. If allowed the promise
// will resolve with true, otherwise it will resolve with false.
already_AddRefed<RequestPromise> GetPromise();
// Helper function that triggers the request. This function will check
// prefs and cancel or allow the request if the appropriate prefs are set,
// otherwise it will fire the request to the associated window.
nsresult Start();
// nsIContentPermissionRequest methods
NS_IMETHOD Cancel(void) override;
NS_IMETHOD Allow(JS::HandleValue choices) override;
private:
explicit MediaKeySystemAccessPermissionRequest(nsGlobalWindowInner* aWindow);
~MediaKeySystemAccessPermissionRequest();
MozPromiseHolder<RequestPromise> mPromiseHolder;
};
} // namespace dom
} // namespace mozilla
#endif // DOM_MEDIA_EME_MEDIAKEYSYSTEMACCESSPERMISSIONREQUEST_H_