gecko/dom/system/gonk/Volume.cpp

/* This Source Code Form is subject to the terms of the Mozilla Public
 * License, v. 2.0. If a copy of the MPL was not distributed with this file,
 * You can obtain one at http://mozilla.org/MPL/2.0/. */

#include "Volume.h"
#include "VolumeCommand.h"
#include "VolumeManager.h"
#include "VolumeManagerLog.h"
#include "nsXULAppAPI.h"

namespace mozilla {
namespace system {

Volume::Volume(const nsCSubstring &aName)
  : mState(STATE_INIT),
    mName(aName)
{
  DBG("Volume %s: created", NameStr());
}

void
Volume::SetState(Volume::STATE aNewState)
{
  if (aNewState == mState) {
    return;
  }
  LOG("Volume %s: changing state from %s to %s (%d observers)",
      NameStr(), StateStr(mState),
      StateStr(aNewState), mEventObserverList.Length());

  mState = aNewState;
  mEventObserverList.Broadcast(this);
}

void
Volume::SetMountPoint(const nsCSubstring &aMountPoint)
{
  if (mMountPoint.Equals(aMountPoint)) {
    return;
  }
  mMountPoint = aMountPoint;
  DBG("Volume %s: Setting mountpoint to '%s'", NameStr(), mMountPoint.get());
}

void
Volume::StartMount(VolumeResponseCallback *aCallback)
{
  StartCommand(new VolumeActionCommand(this, "mount", "", aCallback));
}

void
Volume::StartUnmount(VolumeResponseCallback *aCallback)
{
  StartCommand(new VolumeActionCommand(this, "unmount", "force", aCallback));
}

void
Volume::StartShare(VolumeResponseCallback *aCallback)
{
  StartCommand(new VolumeActionCommand(this, "share", "ums", aCallback));
}

void
Volume::StartUnshare(VolumeResponseCallback *aCallback)
{
  StartCommand(new VolumeActionCommand(this, "unshare", "ums", aCallback));
}

void
Volume::StartCommand(VolumeCommand *aCommand)
{
  VolumeManager::PostCommand(aCommand);
}

void
Volume::RegisterObserver(Volume::EventObserver *aObserver)
{
  MOZ_ASSERT(MessageLoop::current() == XRE_GetIOMessageLoop());

  mEventObserverList.AddObserver(aObserver);
  // Send an initial event to the observer
  aObserver->Notify(this);
}

void
Volume::UnregisterObserver(Volume::EventObserver *aObserver)
{
  MOZ_ASSERT(MessageLoop::current() == XRE_GetIOMessageLoop());

  mEventObserverList.RemoveObserver(aObserver);
}

} // namespace system
} // namespace mozilla