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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 "mozilla/Assertions.h"
#include "mozilla/Telemetry.h"
#include "mozilla/TelemetryHistogramEnums.h"
#include "mozilla/dom/Document.h"
#include "mozilla/dom/Event.h"
#include "mozilla/dom/EventBinding.h"
#include "mozilla/dom/Promise.h"
#include "mozilla/dom/WakeLockSentinelBinding.h"
#include "mozilla/Hal.h"
#include "WakeLockJS.h"
#include "WakeLockSentinel.h"
namespace mozilla::dom {
JSObject* WakeLockSentinel::WrapObject(JSContext* cx,
JS::Handle<JSObject*> aGivenProto) {
return WakeLockSentinel_Binding::Wrap(cx, this, aGivenProto);
}
bool WakeLockSentinel::Released() const { return mReleased; }
void WakeLockSentinel::NotifyLockReleased() {
MOZ_ASSERT(!mReleased);
mReleased = true;
Telemetry::AccumulateTimeDelta(Telemetry::SCREENWAKELOCK_HELD_DURATION_MS,
mCreationTime);
hal::BatteryInformation batteryInfo;
hal::GetCurrentBatteryInformation(&batteryInfo);
if (!batteryInfo.charging()) {
uint32_t level = static_cast<uint32_t>(100 * batteryInfo.level());
Telemetry::Accumulate(
Telemetry::SCREENWAKELOCK_RELEASE_BATTERY_LEVEL_DISCHARGING, level);
}
if (mHoldsActualLock) {
MOZ_ASSERT(mType == WakeLockType::Screen);
NS_DispatchToMainThread(NS_NewRunnableFunction("ReleaseWakeLock", []() {
hal::ModifyWakeLock(u"screen"_ns, hal::WAKE_LOCK_REMOVE_ONE,
hal::WAKE_LOCK_NO_CHANGE);
}));
mHoldsActualLock = false;
}
EventInit init;
init.mBubbles = false;
init.mCancelable = false;
RefPtr<Event> event = Event::Constructor(this, u"release"_ns, init);
DispatchTrustedEvent(event);
}
void WakeLockSentinel::AcquireActualLock() {
MOZ_ASSERT(mType == WakeLockType::Screen);
MOZ_ASSERT(!mHoldsActualLock);
mHoldsActualLock = true;
NS_DispatchToMainThread(NS_NewRunnableFunction("AcquireWakeLock", []() {
hal::ModifyWakeLock(u"screen"_ns, hal::WAKE_LOCK_ADD_ONE,
hal::WAKE_LOCK_NO_CHANGE);
}));
}
// https://w3c.github.io/screen-wake-lock/#the-release-method
already_AddRefed<Promise> WakeLockSentinel::ReleaseLock(ErrorResult& aRv) {
// ReleaseWakeLock will remove this from document.[[ActiveLocks]]
RefPtr<WakeLockSentinel> kungFuDeathGrip(this);
if (!mReleased) {
nsCOMPtr<nsIGlobalObject> global = GetOwnerGlobal();
if (!global) {
aRv.Throw(NS_ERROR_NULL_POINTER);
return nullptr;
}
nsCOMPtr<nsPIDOMWindowInner> window = global->GetAsInnerWindow();
if (!window) {
aRv.Throw(NS_ERROR_NULL_POINTER);
return nullptr;
}
nsCOMPtr<Document> doc = window->GetExtantDoc();
if (!doc) {
aRv.Throw(NS_ERROR_NULL_POINTER);
return nullptr;
}
ReleaseWakeLock(doc, this, mType);
}
if (RefPtr<Promise> p =
Promise::CreateResolvedWithUndefined(GetOwnerGlobal(), aRv)) {
return p.forget();
}
return nullptr;
}
} // namespace mozilla::dom
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