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 "nsIDOMClassInfo.h"
michael@0: #include "nsIDOMEvent.h"
michael@0: #include "nsIDOMEventListener.h"
michael@0: #include "nsPIDOMWindow.h"
michael@0: #include "nsIDocShell.h"
michael@0: #include "nsIPermissionManager.h"
michael@0: #include "nsIInterfaceRequestorUtils.h"
michael@0: #include "AudioChannelManager.h"
michael@0: #include "mozilla/dom/AudioChannelManagerBinding.h"
michael@0: 
michael@0: using namespace mozilla::hal;
michael@0: 
michael@0: namespace mozilla {
michael@0: namespace dom {
michael@0: namespace system {
michael@0: 
michael@0: NS_IMPL_QUERY_INTERFACE_INHERITED(AudioChannelManager, DOMEventTargetHelper,
michael@0:                                   nsIDOMEventListener)
michael@0: NS_IMPL_ADDREF_INHERITED(AudioChannelManager, DOMEventTargetHelper)
michael@0: NS_IMPL_RELEASE_INHERITED(AudioChannelManager, DOMEventTargetHelper)
michael@0: 
michael@0: AudioChannelManager::AudioChannelManager()
michael@0:   : mState(SWITCH_STATE_UNKNOWN)
michael@0:   , mVolumeChannel(-1)
michael@0: {
michael@0:   RegisterSwitchObserver(SWITCH_HEADPHONES, this);
michael@0:   mState = GetCurrentSwitchState(SWITCH_HEADPHONES);
michael@0:   SetIsDOMBinding();
michael@0: }
michael@0: 
michael@0: AudioChannelManager::~AudioChannelManager()
michael@0: {
michael@0:   UnregisterSwitchObserver(SWITCH_HEADPHONES, 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: void
michael@0: AudioChannelManager::Init(nsPIDOMWindow* aWindow)
michael@0: {
michael@0:   BindToOwner(aWindow->IsOuterWindow() ?
michael@0:               aWindow->GetCurrentInnerWindow() : aWindow);
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: JSObject*
michael@0: AudioChannelManager::WrapObject(JSContext* aCx)
michael@0: {
michael@0:   return AudioChannelManagerBinding::Wrap(aCx, this);
michael@0: }
michael@0: 
michael@0: void
michael@0: AudioChannelManager::Notify(const SwitchEvent& aEvent)
michael@0: {
michael@0:   mState = aEvent.status();
michael@0: 
michael@0:   DispatchTrustedEvent(NS_LITERAL_STRING("headphoneschange"));
michael@0: }
michael@0: 
michael@0: bool
michael@0: AudioChannelManager::SetVolumeControlChannel(const nsAString& aChannel)
michael@0: {
michael@0:   if (aChannel.EqualsASCII("publicnotification")) {
michael@0:     return false;
michael@0:   }
michael@0: 
michael@0:   AudioChannel newChannel = AudioChannelService::GetAudioChannel(aChannel);
michael@0: 
michael@0:   // Only normal channel doesn't need permission.
michael@0:   if (newChannel != AudioChannel::Normal) {
michael@0:     nsCOMPtr<nsIPermissionManager> permissionManager =
michael@0:       do_GetService(NS_PERMISSIONMANAGER_CONTRACTID);
michael@0:     if (!permissionManager) {
michael@0:       return false;
michael@0:     }
michael@0:     uint32_t perm = nsIPermissionManager::UNKNOWN_ACTION;
michael@0:     permissionManager->TestPermissionFromWindow(GetOwner(),
michael@0:       nsCString(NS_LITERAL_CSTRING("audio-channel-") +
michael@0:       NS_ConvertUTF16toUTF8(aChannel)).get(), &perm);
michael@0:     if (perm != nsIPermissionManager::ALLOW_ACTION) {
michael@0:       return false;
michael@0:     }
michael@0:   }
michael@0: 
michael@0:   if (mVolumeChannel == (int32_t)newChannel) {
michael@0:     return true;
michael@0:   }
michael@0: 
michael@0:   mVolumeChannel = (int32_t)newChannel;
michael@0: 
michael@0:   NotifyVolumeControlChannelChanged();
michael@0:   return true;
michael@0: }
michael@0: 
michael@0: bool
michael@0: AudioChannelManager::GetVolumeControlChannel(nsAString & aChannel)
michael@0: {
michael@0:   if (mVolumeChannel >= 0) {
michael@0:     AudioChannelService::GetAudioChannelString(
michael@0:                                       static_cast<AudioChannel>(mVolumeChannel),
michael@0:                                       aChannel);
michael@0:   } else {
michael@0:     aChannel.AssignASCII("");
michael@0:   }
michael@0: 
michael@0:   return true;
michael@0: }
michael@0: 
michael@0: void
michael@0: AudioChannelManager::NotifyVolumeControlChannelChanged()
michael@0: {
michael@0:   nsCOMPtr<nsIDocShell> docshell = do_GetInterface(GetOwner());
michael@0:   NS_ENSURE_TRUE_VOID(docshell);
michael@0: 
michael@0:   bool isActive = false;
michael@0:   docshell->GetIsActive(&isActive);
michael@0: 
michael@0:   AudioChannelService* service = AudioChannelService::GetAudioChannelService();
michael@0:   if (isActive) {
michael@0:     service->SetDefaultVolumeControlChannel(mVolumeChannel, isActive);
michael@0:   } else {
michael@0:     service->SetDefaultVolumeControlChannel(-1, isActive);
michael@0:   }
michael@0: }
michael@0: 
michael@0: NS_IMETHODIMP
michael@0: AudioChannelManager::HandleEvent(nsIDOMEvent* aEvent)
michael@0: {
michael@0:   nsAutoString type;
michael@0:   aEvent->GetType(type);
michael@0: 
michael@0:   if (type.EqualsLiteral("visibilitychange")) {
michael@0:     NotifyVolumeControlChannelChanged();
michael@0:   }
michael@0:   return NS_OK;
michael@0: }
michael@0: 
michael@0: } // namespace system
michael@0: } // namespace dom
michael@0: } // namespace mozilla