The Tor Browser: dom/system/gonk/AudioChannelManager.h@b8a032363ba2

Incorporate requested changes from Mozilla in review:
https://bugzilla.mozilla.org/show_bug.cgi?id=1123480#c6

     1 /* This Source Code Form is subject to the terms of the Mozilla Public

     2  * License, v. 2.0. If a copy of the MPL was not distributed with this file,

     3  * You can obtain one at http://mozilla.org/MPL/2.0/. */

     5 #ifndef mozilla_dom_system_AudioChannelManager_h

     6 #define mozilla_dom_system_AudioChannelManager_h

     8 #include "mozilla/DOMEventTargetHelper.h"

     9 #include "mozilla/Hal.h"

    10 #include "mozilla/HalTypes.h"

    11 #include "AudioChannelService.h"

    13 namespace mozilla {

    14 namespace hal {

    15 class SwitchEvent;

    16 typedef Observer<SwitchEvent> SwitchObserver;

    17 } // namespace hal

    19 namespace dom {

    20 namespace system {

    22 class AudioChannelManager MOZ_FINAL

    23   : public DOMEventTargetHelper

    24   , public hal::SwitchObserver

    25   , public nsIDOMEventListener

    26 {

    27 public:

    28   AudioChannelManager();

    29   virtual ~AudioChannelManager();

    31   NS_DECL_ISUPPORTS_INHERITED

    32   NS_DECL_NSIDOMEVENTLISTENER

    34   void Notify(const hal::SwitchEvent& aEvent);

    36   void Init(nsPIDOMWindow* aWindow);

    38   /**

    39    * WebIDL Interface

    40    */

    42   nsPIDOMWindow* GetParentObject() const

    43   {

    44      return GetOwner();

    45   }

    47   virtual JSObject* WrapObject(JSContext* aCx) MOZ_OVERRIDE;

    49   bool Headphones() const

    50   {

    51     // Bug 929139 - Remove the assert check for SWITCH_STATE_UNKNOWN.

    52     // If any devices (ex: emulator) didn't have the corresponding sys node for

    53     // headset switch state then GonkSwitch will report the unknown state.

    54     // So it is possible to get unknown state here.

    55     return mState != hal::SWITCH_STATE_OFF &&

    56            mState != hal::SWITCH_STATE_UNKNOWN;

    57   }

    59   bool SetVolumeControlChannel(const nsAString& aChannel);

    61   bool GetVolumeControlChannel(nsAString& aChannel);

    63   IMPL_EVENT_HANDLER(headphoneschange)

    65 private:

    66   void NotifyVolumeControlChannelChanged();

    68   hal::SwitchState mState;

    69   int32_t mVolumeChannel;

    70 };

    72 } // namespace system

    73 } // namespace dom

    74 } // namespace mozilla

    76 #endif // mozilla_dom_system_AudioChannelManager_h

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