gecko/dom/power/PowerManagerService.cpp
Justin Lebar a863832283 Bug 772987 - Part 2: Use Static{Auto,Ref}Ptr where appropriate. r=mounir
--HG--
extra : rebase_source : 4e3e72ba53cd0177160f80231eebeb4972119eec
2012-07-26 15:33:45 -04:00

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3.5 KiB
C++

/* -*- Mode: C++; tab-width: 2; indent-tabs-mode: nil; c-basic-offset: 2 -*- */
/* 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 "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 */ StaticRefPtr<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