michael@0: /* This Source Code Form is subject to the terms of the Mozilla Public
michael@0:  * License, v. 2.0. If a copy of the MPL was not distributed with this file,
michael@0:  * You can obtain one at http://mozilla.org/MPL/2.0/. */
michael@0: 
michael@0: #include "SpeakerManager.h"
michael@0: #include "nsIDOMClassInfo.h"
michael@0: #include "nsIDOMEvent.h"
michael@0: #include "nsIDOMEventListener.h"
michael@0: #include "SpeakerManagerService.h"
michael@0: #include "nsIPermissionManager.h"
michael@0: #include "nsIInterfaceRequestorUtils.h"
michael@0: #include "nsIDocShell.h"
michael@0: #include "AudioChannelService.h"
michael@0: 
michael@0: namespace mozilla {
michael@0: namespace dom {
michael@0: 
michael@0: NS_IMPL_QUERY_INTERFACE_INHERITED(SpeakerManager, DOMEventTargetHelper,
michael@0:                                   nsIDOMEventListener)
michael@0: NS_IMPL_ADDREF_INHERITED(SpeakerManager, DOMEventTargetHelper)
michael@0: NS_IMPL_RELEASE_INHERITED(SpeakerManager, DOMEventTargetHelper)
michael@0: 
michael@0: SpeakerManager::SpeakerManager()
michael@0:   : mForcespeaker(false)
michael@0:   , mVisible(false)
michael@0: {
michael@0:   SetIsDOMBinding();
michael@0:   SpeakerManagerService *service =
michael@0:     SpeakerManagerService::GetSpeakerManagerService();
michael@0:   if (service) {
michael@0:     service->RegisterSpeakerManager(this);
michael@0:   }
michael@0: }
michael@0: 
michael@0: SpeakerManager::~SpeakerManager()
michael@0: {
michael@0:   SpeakerManagerService *service = SpeakerManagerService::GetSpeakerManagerService();
michael@0:   if (service) {
michael@0:     service->UnRegisterSpeakerManager(this);
michael@0:   }
michael@0:   nsCOMPtr<EventTarget> target = do_QueryInterface(GetOwner());
michael@0:   NS_ENSURE_TRUE_VOID(target);
michael@0: 
michael@0:   target->RemoveSystemEventListener(NS_LITERAL_STRING("visibilitychange"),
michael@0:                                     this,
michael@0:                                     /* useCapture = */ true);
michael@0: }
michael@0: 
michael@0: bool
michael@0: SpeakerManager::Speakerforced()
michael@0: {
michael@0:   // If a background app calls forcespeaker=true that doesn't change anything.
michael@0:   // 'speakerforced' remains false everywhere.
michael@0:   if (mForcespeaker && !mVisible) {
michael@0:     return false;
michael@0:   }
michael@0:   SpeakerManagerService *service = SpeakerManagerService::GetSpeakerManagerService();
michael@0:   if (service) {
michael@0:     return service->GetSpeakerStatus();
michael@0:   }
michael@0:   return false;
michael@0: }
michael@0: 
michael@0: bool
michael@0: SpeakerManager::Forcespeaker()
michael@0: {
michael@0:   return mForcespeaker;
michael@0: }
michael@0: 
michael@0: void
michael@0: SpeakerManager::SetForcespeaker(bool aEnable)
michael@0: {
michael@0:   SpeakerManagerService *service = SpeakerManagerService::GetSpeakerManagerService();
michael@0:   if (service) {
michael@0:     service->ForceSpeaker(aEnable, mVisible);
michael@0:   }
michael@0:   mForcespeaker = aEnable;
michael@0: }
michael@0: 
michael@0: void
michael@0: SpeakerManager::DispatchSimpleEvent(const nsAString& aStr)
michael@0: {
michael@0:   NS_ABORT_IF_FALSE(NS_IsMainThread(), "Not running on main thread");
michael@0:   nsresult rv = CheckInnerWindowCorrectness();
michael@0:   if (NS_FAILED(rv)) {
michael@0:     return;
michael@0:   }
michael@0: 
michael@0:   nsCOMPtr<nsIDOMEvent> event;
michael@0:   rv = NS_NewDOMEvent(getter_AddRefs(event), this, nullptr, nullptr);
michael@0:   if (NS_FAILED(rv)) {
michael@0:     NS_WARNING("Failed to create the error event!!!");
michael@0:     return;
michael@0:   }
michael@0:   rv = event->InitEvent(aStr, false, false);
michael@0: 
michael@0:   if (NS_FAILED(rv)) {
michael@0:     NS_WARNING("Failed to init the error event!!!");
michael@0:     return;
michael@0:   }
michael@0: 
michael@0:   event->SetTrusted(true);
michael@0: 
michael@0:   rv = DispatchDOMEvent(nullptr, event, nullptr, nullptr);
michael@0:   if (NS_FAILED(rv)) {
michael@0:     NS_ERROR("Failed to dispatch the event!!!");
michael@0:     return;
michael@0:   }
michael@0: }
michael@0: 
michael@0: void
michael@0: SpeakerManager::Init(nsPIDOMWindow* aWindow)
michael@0: {
michael@0:   BindToOwner(aWindow);
michael@0: 
michael@0:   nsCOMPtr<nsIDocShell> docshell = do_GetInterface(GetOwner());
michael@0:   NS_ENSURE_TRUE_VOID(docshell);
michael@0:   docshell->GetIsActive(&mVisible);
michael@0: 
michael@0:   nsCOMPtr<nsIDOMEventTarget> target = do_QueryInterface(GetOwner());
michael@0:   NS_ENSURE_TRUE_VOID(target);
michael@0: 
michael@0:   target->AddSystemEventListener(NS_LITERAL_STRING("visibilitychange"),
michael@0:                                  this,
michael@0:                                  /* useCapture = */ true,
michael@0:                                  /* wantsUntrusted = */ false);
michael@0: }
michael@0: 
michael@0: nsPIDOMWindow*
michael@0: SpeakerManager::GetParentObject() const
michael@0: {
michael@0:   return GetOwner();
michael@0: }
michael@0: 
michael@0: /* static */ already_AddRefed<SpeakerManager>
michael@0: SpeakerManager::Constructor(const GlobalObject& aGlobal, ErrorResult& aRv)
michael@0: {
michael@0:   nsCOMPtr<nsIScriptGlobalObject> sgo = do_QueryInterface(aGlobal.GetAsSupports());
michael@0:   if (!sgo) {
michael@0:     aRv.Throw(NS_ERROR_FAILURE);
michael@0:     return nullptr;
michael@0:   }
michael@0: 
michael@0:   nsCOMPtr<nsPIDOMWindow> ownerWindow = do_QueryInterface(aGlobal.GetAsSupports());
michael@0:   if (!ownerWindow) {
michael@0:     aRv.Throw(NS_ERROR_FAILURE);
michael@0:     return nullptr;
michael@0:   }
michael@0: 
michael@0:   nsCOMPtr<nsIPermissionManager> permMgr =
michael@0:     do_GetService(NS_PERMISSIONMANAGER_CONTRACTID);
michael@0:   NS_ENSURE_TRUE(permMgr, nullptr);
michael@0: 
michael@0:   uint32_t permission = nsIPermissionManager::DENY_ACTION;
michael@0:   nsresult rv =
michael@0:     permMgr->TestPermissionFromWindow(ownerWindow, "speaker-control",
michael@0:                                       &permission);
michael@0:   NS_ENSURE_SUCCESS(rv, nullptr);
michael@0: 
michael@0:   if (permission != nsIPermissionManager::ALLOW_ACTION) {
michael@0:     aRv.Throw(NS_ERROR_DOM_SECURITY_ERR);
michael@0:     return nullptr;
michael@0:   }
michael@0: 
michael@0:   nsRefPtr<SpeakerManager> object = new SpeakerManager();
michael@0:   object->Init(ownerWindow);
michael@0:   return object.forget();
michael@0: }
michael@0: 
michael@0: JSObject*
michael@0: SpeakerManager::WrapObject(JSContext* aCx)
michael@0: {
michael@0:   return MozSpeakerManagerBinding::Wrap(aCx, this);
michael@0: }
michael@0: 
michael@0: NS_IMETHODIMP
michael@0: SpeakerManager::HandleEvent(nsIDOMEvent* aEvent)
michael@0: {
michael@0:   nsAutoString type;
michael@0:   aEvent->GetType(type);
michael@0: 
michael@0:   if (!type.EqualsLiteral("visibilitychange")) {
michael@0:     return NS_ERROR_FAILURE;
michael@0:   }
michael@0: 
michael@0:   nsCOMPtr<nsIDocShell> docshell = do_GetInterface(GetOwner());
michael@0:   NS_ENSURE_TRUE(docshell, NS_ERROR_FAILURE);
michael@0:   docshell->GetIsActive(&mVisible);
michael@0: 
michael@0:   // If an app that has called forcespeaker=true is switched
michael@0:   // from the background to the foreground 'speakerforced'
michael@0:   // switches to true in all apps. I.e. the app doesn't have to
michael@0:   // call forcespeaker=true again when it comes into foreground.
michael@0:   SpeakerManagerService *service =
michael@0:     SpeakerManagerService::GetSpeakerManagerService();
michael@0:   if (service && mVisible && mForcespeaker) {
michael@0:     service->ForceSpeaker(mForcespeaker, mVisible);
michael@0:   }
michael@0:   // If an application that has called forcespeaker=true, but no audio is
michael@0:   // currently playing in the app itself, if application switch to
michael@0:   // the background, we switch 'speakerforced' to false.
michael@0:   if (!mVisible && mForcespeaker) {
michael@0:     AudioChannelService* audioChannelService =
michael@0:       AudioChannelService::GetAudioChannelService();
michael@0:     if (audioChannelService && !audioChannelService->AnyAudioChannelIsActive()) {
michael@0:       service->ForceSpeaker(false, mVisible);
michael@0:     }
michael@0:   }
michael@0:   return NS_OK;
michael@0: }
michael@0: 
michael@0: void
michael@0: SpeakerManager::SetAudioChannelActive(bool isActive)
michael@0: {
michael@0:   if (!isActive && !mVisible) {
michael@0:     SpeakerManagerService *service =
michael@0:       SpeakerManagerService::GetSpeakerManagerService();
michael@0:     if (service) {
michael@0:       service->ForceSpeaker(false, mVisible);
michael@0:     }
michael@0:   }
michael@0: }
michael@0: 
michael@0: } // namespace dom
michael@0: } // namespace mozilla