gecko/dom/power/PowerManagerService.cpp

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/* -*- Mode: C++; tab-width: 2; indent-tabs-mode: nil; c-basic-offset: 2 -*- */
/* ***** BEGIN LICENSE BLOCK *****
* Version: MPL 1.1/GPL 2.0/LGPL 2.1
*
* The contents of this file are subject to the Mozilla Public License Version
* 1.1 (the "License"); you may not use this file except in compliance with
* the License. You may obtain a copy of the License at
* http://www.mozilla.org/MPL/
*
* Software distributed under the License is distributed on an "AS IS" basis,
* WITHOUT WARRANTY OF ANY KIND, either express or implied. See the License
* for the specific language governing rights and limitations under the
* License.
*
* The Original Code is mozilla.org code.
*
* The Initial Developer of the Original Code is Mozilla Foundation
* Portions created by the Initial Developer are Copyright (C) 2011
* the Initial Developer. All Rights Reserved.
*
* Contributor(s):
* Kan-Ru Chen <kchen@mozilla.com> (Original Author)
*
* Alternatively, the contents of this file may be used under the terms of
* either of the GNU General Public License Version 2 or later (the "GPL"),
* or the GNU Lesser General Public License Version 2.1 or later (the "LGPL"),
* in which case the provisions of the GPL or the LGPL are applicable instead
* of those above. If you wish to allow use of your version of this file only
* under the terms of either the GPL or the LGPL, and not to allow others to
* use your version of this file under the terms of the MPL, indicate your
* decision by deleting the provisions above and replace them with the notice
* and other provisions required by the GPL or the LGPL. If you do not delete
* the provisions above, a recipient may use your version of this file under
* the terms of any one of the MPL, the GPL or the LGPL.
*
* ***** END LICENSE BLOCK ***** */
#include "mozilla/Hal.h"
#include "mozilla/HalWakeLock.h"
#include "mozilla/ClearOnShutdown.h"
#include "nsIDOMWakeLockListener.h"
#include "nsIDOMWindow.h"
#include "PowerManagerService.h"
#include "WakeLock.h"
namespace mozilla {
namespace dom {
namespace power {
NS_IMPL_ISUPPORTS1(PowerManagerService, nsIPowerManagerService)
/* static */ nsRefPtr<PowerManagerService> PowerManagerService::sSingleton;
/* static */ already_AddRefed<nsIPowerManagerService>
PowerManagerService::GetInstance()
{
if (!sSingleton) {
sSingleton = new PowerManagerService();
sSingleton->Init();
ClearOnShutdown(&sSingleton);
}
nsCOMPtr<nsIPowerManagerService> service(do_QueryInterface(sSingleton));
return service.forget();
}
void
PowerManagerService::Init()
{
hal::RegisterWakeLockObserver(this);
}
PowerManagerService::~PowerManagerService()
{
hal::UnregisterWakeLockObserver(this);
}
void
PowerManagerService::ComputeWakeLockState(const hal::WakeLockInformation& aWakeLockInfo,
nsAString &aState)
{
hal::WakeLockState state = hal::ComputeWakeLockState(aWakeLockInfo.numLocks(),
aWakeLockInfo.numHidden());
switch (state) {
case hal::WAKE_LOCK_STATE_UNLOCKED:
aState.AssignLiteral("unlocked");
break;
case hal::WAKE_LOCK_STATE_HIDDEN:
aState.AssignLiteral("locked-background");
break;
case hal::WAKE_LOCK_STATE_VISIBLE:
aState.AssignLiteral("locked-foreground");
break;
}
}
void
PowerManagerService::Notify(const hal::WakeLockInformation& aWakeLockInfo)
{
nsAutoString state;
ComputeWakeLockState(aWakeLockInfo, state);
/**
* Copy the listeners list before we walk through the callbacks
* because the callbacks may install new listeners. We expect no
* more than one listener per window, so it shouldn't be too long.
*/
nsAutoTArray<nsCOMPtr<nsIDOMMozWakeLockListener>, 2> listeners(mWakeLockListeners);
for (PRUint32 i = 0; i < listeners.Length(); ++i) {
listeners[i]->Callback(aWakeLockInfo.topic(), state);
}
}
NS_IMETHODIMP
PowerManagerService::Reboot()
{
hal::Reboot();
return NS_OK;
}
NS_IMETHODIMP
PowerManagerService::PowerOff()
{
hal::PowerOff();
return NS_OK;
}
NS_IMETHODIMP
PowerManagerService::AddWakeLockListener(nsIDOMMozWakeLockListener *aListener)
{
if (mWakeLockListeners.Contains(aListener))
return NS_OK;
mWakeLockListeners.AppendElement(aListener);
return NS_OK;
}
NS_IMETHODIMP
PowerManagerService::RemoveWakeLockListener(nsIDOMMozWakeLockListener *aListener)
{
mWakeLockListeners.RemoveElement(aListener);
return NS_OK;
}
NS_IMETHODIMP
PowerManagerService::GetWakeLockState(const nsAString &aTopic, nsAString &aState)
{
hal::WakeLockInformation info;
hal::GetWakeLockInfo(aTopic, &info);
ComputeWakeLockState(info, aState);
return NS_OK;
}
NS_IMETHODIMP
PowerManagerService::NewWakeLock(const nsAString &aTopic,
nsIDOMWindow *aWindow,
nsIDOMMozWakeLock **aWakeLock)
{
nsRefPtr<WakeLock> wakelock = new WakeLock();
nsresult rv = wakelock->Init(aTopic, aWindow);
NS_ENSURE_SUCCESS(rv, rv);
nsCOMPtr<nsIDOMMozWakeLock> wl(wakelock);
wl.forget(aWakeLock);
return NS_OK;
}
} // power
} // dom
} // mozilla