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/* -*- Mode: C++; tab-width: 8; indent-tabs-mode: nil; c-basic-offset: 2 -*- */
/* vim: set ts=8 sts=2 et sw=2 tw=80: */
/* 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 "PowerManagerService.h"
#include "WakeLock.h"
#include "mozilla/ClearOnShutdown.h"
#include "mozilla/Hal.h"
#include "mozilla/HalWakeLock.h"
#include "mozilla/ModuleUtils.h"
#include "mozilla/Preferences.h"
#include "mozilla/dom/ContentParent.h"
#include "nsIDOMWakeLockListener.h"
// For _exit().
#ifdef XP_WIN
# include <process.h>
#else
# include <unistd.h>
#endif
namespace mozilla::dom::power {
using namespace hal;
NS_IMPL_ISUPPORTS(PowerManagerService, nsIPowerManagerService)
/* static */
StaticRefPtr<PowerManagerService> PowerManagerService::sSingleton;
/* static */
already_AddRefed<PowerManagerService> PowerManagerService::GetInstance() {
if (!sSingleton) {
sSingleton = new PowerManagerService();
sSingleton->Init();
ClearOnShutdown(&sSingleton);
}
RefPtr<PowerManagerService> service = sSingleton.get();
return service.forget();
}
void PowerManagerService::Init() { RegisterWakeLockObserver(this); }
PowerManagerService::~PowerManagerService() {
UnregisterWakeLockObserver(this);
}
void PowerManagerService::ComputeWakeLockState(
const WakeLockInformation& aWakeLockInfo, nsAString& aState) {
WakeLockState state = hal::ComputeWakeLockState(aWakeLockInfo.numLocks(),
aWakeLockInfo.numHidden());
switch (state) {
case WAKE_LOCK_STATE_UNLOCKED:
aState.AssignLiteral("unlocked");
break;
case WAKE_LOCK_STATE_HIDDEN:
aState.AssignLiteral("locked-background");
break;
case WAKE_LOCK_STATE_VISIBLE:
aState.AssignLiteral("locked-foreground");
break;
}
}
void PowerManagerService::Notify(const 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.
*/
const CopyableAutoTArray<nsCOMPtr<nsIDOMMozWakeLockListener>, 2> listeners =
mWakeLockListeners;
for (uint32_t i = 0; i < listeners.Length(); ++i) {
listeners[i]->Callback(aWakeLockInfo.topic(), state);
}
}
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) {
WakeLockInformation info;
GetWakeLockInfo(aTopic, &info);
ComputeWakeLockState(info, aState);
return NS_OK;
}
already_AddRefed<WakeLock> PowerManagerService::NewWakeLock(
const nsAString& aTopic, nsPIDOMWindowInner* aWindow,
mozilla::ErrorResult& aRv) {
RefPtr<WakeLock> wakelock = new WakeLock();
aRv = wakelock->Init(aTopic, aWindow);
if (aRv.Failed()) {
return nullptr;
}
return wakelock.forget();
}
NS_IMETHODIMP
PowerManagerService::NewWakeLock(const nsAString& aTopic,
mozIDOMWindow* aWindow,
nsIWakeLock** aWakeLock) {
mozilla::ErrorResult rv;
RefPtr<WakeLock> wakelock =
NewWakeLock(aTopic, nsPIDOMWindowInner::From(aWindow), rv);
if (rv.Failed()) {
return rv.StealNSResult();
}
wakelock.forget(aWakeLock);
return NS_OK;
}
} // namespace mozilla::dom::power
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