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: #ifndef mozilla_dom_system_AudioChannelManager_h
michael@0: #define mozilla_dom_system_AudioChannelManager_h
michael@0: 
michael@0: #include "mozilla/DOMEventTargetHelper.h"
michael@0: #include "mozilla/Hal.h"
michael@0: #include "mozilla/HalTypes.h"
michael@0: #include "AudioChannelService.h"
michael@0: 
michael@0: namespace mozilla {
michael@0: namespace hal {
michael@0: class SwitchEvent;
michael@0: typedef Observer<SwitchEvent> SwitchObserver;
michael@0: } // namespace hal
michael@0: 
michael@0: namespace dom {
michael@0: namespace system {
michael@0: 
michael@0: class AudioChannelManager MOZ_FINAL
michael@0:   : public DOMEventTargetHelper
michael@0:   , public hal::SwitchObserver
michael@0:   , public nsIDOMEventListener
michael@0: {
michael@0: public:
michael@0:   AudioChannelManager();
michael@0:   virtual ~AudioChannelManager();
michael@0: 
michael@0:   NS_DECL_ISUPPORTS_INHERITED
michael@0:   NS_DECL_NSIDOMEVENTLISTENER
michael@0: 
michael@0:   void Notify(const hal::SwitchEvent& aEvent);
michael@0: 
michael@0:   void Init(nsPIDOMWindow* aWindow);
michael@0: 
michael@0:   /**
michael@0:    * WebIDL Interface
michael@0:    */
michael@0: 
michael@0:   nsPIDOMWindow* GetParentObject() const
michael@0:   {
michael@0:      return GetOwner();
michael@0:   }
michael@0: 
michael@0:   virtual JSObject* WrapObject(JSContext* aCx) MOZ_OVERRIDE;
michael@0: 
michael@0:   bool Headphones() const
michael@0:   {
michael@0:     // Bug 929139 - Remove the assert check for SWITCH_STATE_UNKNOWN.
michael@0:     // If any devices (ex: emulator) didn't have the corresponding sys node for
michael@0:     // headset switch state then GonkSwitch will report the unknown state.
michael@0:     // So it is possible to get unknown state here.
michael@0:     return mState != hal::SWITCH_STATE_OFF &&
michael@0:            mState != hal::SWITCH_STATE_UNKNOWN;
michael@0:   }
michael@0: 
michael@0:   bool SetVolumeControlChannel(const nsAString& aChannel);
michael@0: 
michael@0:   bool GetVolumeControlChannel(nsAString& aChannel);
michael@0: 
michael@0:   IMPL_EVENT_HANDLER(headphoneschange)
michael@0: 
michael@0: private:
michael@0:   void NotifyVolumeControlChannelChanged();
michael@0: 
michael@0:   hal::SwitchState mState;
michael@0:   int32_t mVolumeChannel;
michael@0: };
michael@0: 
michael@0: } // namespace system
michael@0: } // namespace dom
michael@0: } // namespace mozilla
michael@0: 
michael@0: #endif // mozilla_dom_system_AudioChannelManager_h