dom/media/eme/MediaKeySystemAccessPermissionRequest.cpp

   1 /* -*- Mode: C++; tab-width: 2; indent-tabs-mode: nil; c-basic-offset: 2 -*- */
   2 /* vim:set ts=2 sw=2 sts=2 et cindent: */
   3 /* This Source Code Form is subject to the terms of the Mozilla Public
   4  * License, v. 2.0. If a copy of the MPL was not distributed with this
   5  * file, You can obtain one at http://mozilla.org/MPL/2.0/. */
   6
   7 #include "MediaKeySystemAccessPermissionRequest.h"
   8
   9 #include "nsGlobalWindowInner.h"
  10
  11 namespace mozilla::dom {
  12
  13 NS_IMPL_CYCLE_COLLECTION_INHERITED(MediaKeySystemAccessPermissionRequest,
  14                                    ContentPermissionRequestBase)
  15
  16 NS_IMPL_ISUPPORTS_CYCLE_COLLECTION_INHERITED_0(
  17     MediaKeySystemAccessPermissionRequest, ContentPermissionRequestBase)
  18
  19 /* static */
  20 already_AddRefed<MediaKeySystemAccessPermissionRequest>
  21 MediaKeySystemAccessPermissionRequest::Create(nsPIDOMWindowInner* aWindow) {
  22   // Could conceivably be created off main thread then used on main thread
  23   // later. If we really need to do that at some point we could relax this
  24   // assert.
  25   AssertIsOnMainThread();
  26   if (!aWindow) {
  27     return nullptr;
  28   }
  29
  30   nsGlobalWindowInner* innerWindow = nsGlobalWindowInner::Cast(aWindow);
  31   if (!innerWindow->GetPrincipal()) {
  32     return nullptr;
  33   }
  34
  35   RefPtr<MediaKeySystemAccessPermissionRequest> request =
  36       new MediaKeySystemAccessPermissionRequest(innerWindow);
  37   return request.forget();
  38 }
  39
  40 MediaKeySystemAccessPermissionRequest::MediaKeySystemAccessPermissionRequest(
  41     nsGlobalWindowInner* aWindow)
  42     : ContentPermissionRequestBase(aWindow->GetPrincipal(), aWindow,
  43                                    "media.eme.require-app-approval"_ns,
  44                                    "media-key-system-access"_ns) {}
  45
  46 MediaKeySystemAccessPermissionRequest::
  47     ~MediaKeySystemAccessPermissionRequest() {
  48   AssertIsOnMainThread();
  49   // If a request has not been serviced by the time it is destroyed, treat it
  50   // as if the request was denied.
  51   Cancel();
  52 }
  53
  54 already_AddRefed<MediaKeySystemAccessPermissionRequest::RequestPromise>
  55 MediaKeySystemAccessPermissionRequest::GetPromise() {
  56   return mPromiseHolder.Ensure(__func__);
  57 }
  58
  59 nsresult MediaKeySystemAccessPermissionRequest::Start() {
  60   // Check test prefs to see if we should short circuit. We want to do this
  61   // before checking the cached value so we can have pref changes take effect
  62   // without refreshing the page.
  63   MediaKeySystemAccessPermissionRequest::PromptResult promptResult =
  64       CheckPromptPrefs();
  65   if (promptResult ==
  66       MediaKeySystemAccessPermissionRequest::PromptResult::Granted) {
  67     return Allow(JS::UndefinedHandleValue);
  68   }
  69   if (promptResult ==
  70       MediaKeySystemAccessPermissionRequest::PromptResult::Denied) {
  71     return Cancel();
  72   }
  73
  74   return nsContentPermissionUtils::AskPermission(this, mWindow);
  75 }
  76
  77 NS_IMETHODIMP
  78 MediaKeySystemAccessPermissionRequest::Allow(JS::Handle<JS::Value> aChoices) {
  79   AssertIsOnMainThread();
  80   mPromiseHolder.ResolveIfExists(true, __func__);
  81   return NS_OK;
  82 }
  83
  84 NS_IMETHODIMP
  85 MediaKeySystemAccessPermissionRequest::Cancel() {
  86   AssertIsOnMainThread();
  87   mPromiseHolder.RejectIfExists(false, __func__);
  88   return NS_OK;
  89 }
  90
  91 }  // namespace mozilla::dom