mirror of
https://gitlab.winehq.org/wine/wine-gecko.git
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139 lines
4.1 KiB
C++
139 lines
4.1 KiB
C++
/* -*- Mode: C++; tab-width: 8; indent-tabs-mode: nil; c-basic-offset: 2 -*- */
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/* vim: set ts=8 sts=2 et sw=2 tw=80: */
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/* This Source Code Form is subject to the terms of the Mozilla Public
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* License, v. 2.0. If a copy of the MPL was not distributed with this
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* file, You can obtain one at http://mozilla.org/MPL/2.0/. */
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#include <limits>
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#include "BatteryManager.h"
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#include "Constants.h"
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#include "mozilla/DOMEventTargetHelper.h"
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#include "mozilla/Hal.h"
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#include "mozilla/dom/BatteryManagerBinding.h"
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#include "nsIDOMClassInfo.h"
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/**
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* We have to use macros here because our leak analysis tool things we are
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* leaking strings when we have |static const nsString|. Sad :(
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*/
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#define LEVELCHANGE_EVENT_NAME NS_LITERAL_STRING("levelchange")
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#define CHARGINGCHANGE_EVENT_NAME NS_LITERAL_STRING("chargingchange")
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#define DISCHARGINGTIMECHANGE_EVENT_NAME NS_LITERAL_STRING("dischargingtimechange")
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#define CHARGINGTIMECHANGE_EVENT_NAME NS_LITERAL_STRING("chargingtimechange")
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namespace mozilla {
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namespace dom {
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namespace battery {
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BatteryManager::BatteryManager(nsPIDOMWindow* aWindow)
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: DOMEventTargetHelper(aWindow)
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, mLevel(kDefaultLevel)
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, mCharging(kDefaultCharging)
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, mRemainingTime(kDefaultRemainingTime)
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{
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}
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void
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BatteryManager::Init()
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{
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hal::RegisterBatteryObserver(this);
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hal::BatteryInformation batteryInfo;
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hal::GetCurrentBatteryInformation(&batteryInfo);
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UpdateFromBatteryInfo(batteryInfo);
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}
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void
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BatteryManager::Shutdown()
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{
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hal::UnregisterBatteryObserver(this);
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}
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JSObject*
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BatteryManager::WrapObject(JSContext* aCx, JS::Handle<JSObject*> aGivenProto)
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{
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return BatteryManagerBinding::Wrap(aCx, this, aGivenProto);
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}
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double
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BatteryManager::DischargingTime() const
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{
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if (mCharging || mRemainingTime == kUnknownRemainingTime) {
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return std::numeric_limits<double>::infinity();
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}
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return mRemainingTime;
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}
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double
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BatteryManager::ChargingTime() const
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{
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if (!mCharging || mRemainingTime == kUnknownRemainingTime) {
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return std::numeric_limits<double>::infinity();
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}
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return mRemainingTime;
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}
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void
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BatteryManager::UpdateFromBatteryInfo(const hal::BatteryInformation& aBatteryInfo)
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{
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mLevel = aBatteryInfo.level();
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mCharging = aBatteryInfo.charging();
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mRemainingTime = aBatteryInfo.remainingTime();
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// Add some guards to make sure the values are coherent.
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if (mLevel == 1.0 && mCharging == true &&
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mRemainingTime != kDefaultRemainingTime) {
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mRemainingTime = kDefaultRemainingTime;
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NS_ERROR("Battery API: When charging and level at 1.0, remaining time "
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"should be 0. Please fix your backend!");
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}
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}
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void
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BatteryManager::Notify(const hal::BatteryInformation& aBatteryInfo)
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{
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double previousLevel = mLevel;
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bool previousCharging = mCharging;
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double previousRemainingTime = mRemainingTime;
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UpdateFromBatteryInfo(aBatteryInfo);
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if (previousCharging != mCharging) {
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DispatchTrustedEvent(CHARGINGCHANGE_EVENT_NAME);
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}
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if (previousLevel != mLevel) {
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DispatchTrustedEvent(LEVELCHANGE_EVENT_NAME);
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}
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/*
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* There are a few situations that could happen here:
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* 1. Charging state changed:
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* a. Previous remaining time wasn't unkwonw, we have to fire an event for
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* the change.
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* b. New remaining time isn't unkwonw, we have to fire an event for it.
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* 2. Charging state didn't change but remainingTime did, we have to fire
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* the event that correspond to the current charging state.
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*/
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if (mCharging != previousCharging) {
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if (previousRemainingTime != kUnknownRemainingTime) {
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DispatchTrustedEvent(previousCharging ? CHARGINGTIMECHANGE_EVENT_NAME
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: DISCHARGINGTIMECHANGE_EVENT_NAME);
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}
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if (mRemainingTime != kUnknownRemainingTime) {
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DispatchTrustedEvent(mCharging ? CHARGINGTIMECHANGE_EVENT_NAME
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: DISCHARGINGTIMECHANGE_EVENT_NAME);
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}
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} else if (previousRemainingTime != mRemainingTime) {
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DispatchTrustedEvent(mCharging ? CHARGINGTIMECHANGE_EVENT_NAME
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: DISCHARGINGTIMECHANGE_EVENT_NAME);
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}
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}
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} // namespace battery
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} // namespace dom
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} // namespace mozilla
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