1.1 --- /dev/null Thu Jan 01 00:00:00 1970 +0000
1.2 +++ b/hal/windows/WindowsBattery.cpp Wed Dec 31 06:09:35 2014 +0100
1.3 @@ -0,0 +1,190 @@
1.4 +/* -*- Mode: C++; tab-width: 2; indent-tabs-mode: nil; c-basic-offset: 2 -*- */
1.5 +/* This Source Code Form is subject to the terms of the Mozilla Public
1.6 + * License, v. 2.0. If a copy of the MPL was not distributed with this
1.7 + * file, You can obtain one at http://mozilla.org/MPL/2.0/. */
1.8 +
1.9 +#include "Hal.h"
1.10 +#include "HalImpl.h"
1.11 +#include "nsITimer.h"
1.12 +#include "mozilla/Preferences.h"
1.13 +#include "mozilla/dom/battery/Constants.h"
1.14 +#include "nsComponentManagerUtils.h"
1.15 +
1.16 +#include <windows.h>
1.17 +#include "mozilla/WindowsVersion.h"
1.18 +
1.19 +using namespace mozilla::dom::battery;
1.20 +
1.21 +namespace mozilla {
1.22 +namespace hal_impl {
1.23 +
1.24 +static nsCOMPtr<nsITimer> sUpdateTimer;
1.25 +
1.26 +/* Power Event API is Vista or later */
1.27 +static decltype(RegisterPowerSettingNotification)* sRegisterPowerSettingNotification = nullptr;
1.28 +static decltype(UnregisterPowerSettingNotification)* sUnregisterPowerSettingNotification = nullptr;
1.29 +static HPOWERNOTIFY sPowerHandle = nullptr;
1.30 +static HPOWERNOTIFY sCapacityHandle = nullptr;
1.31 +static HWND sHWnd = nullptr;
1.32 +
1.33 +static void
1.34 +UpdateHandler(nsITimer* aTimer, void* aClosure) {
1.35 + NS_ASSERTION(!IsVistaOrLater(),
1.36 + "We shouldn't call this function for Vista or later version!");
1.37 +
1.38 + static hal::BatteryInformation sLastInfo;
1.39 + hal::BatteryInformation currentInfo;
1.40 +
1.41 + hal_impl::GetCurrentBatteryInformation(¤tInfo);
1.42 + if (sLastInfo.level() != currentInfo.level() ||
1.43 + sLastInfo.charging() != currentInfo.charging() ||
1.44 + sLastInfo.remainingTime() != currentInfo.remainingTime()) {
1.45 + hal::NotifyBatteryChange(currentInfo);
1.46 + sLastInfo = currentInfo;
1.47 + }
1.48 +}
1.49 +
1.50 +static
1.51 +LRESULT CALLBACK
1.52 +BatteryWindowProc(HWND hwnd, UINT msg, WPARAM wParam, LPARAM lParam) {
1.53 + if (msg != WM_POWERBROADCAST || wParam != PBT_POWERSETTINGCHANGE) {
1.54 + return DefWindowProc(hwnd, msg, wParam, lParam);
1.55 + }
1.56 +
1.57 + hal::BatteryInformation currentInfo;
1.58 +
1.59 + // Since we need update remainingTime, we cannot use LPARAM.
1.60 + hal_impl::GetCurrentBatteryInformation(¤tInfo);
1.61 +
1.62 + hal::NotifyBatteryChange(currentInfo);
1.63 + return TRUE;
1.64 +}
1.65 +
1.66 +void
1.67 +EnableBatteryNotifications()
1.68 +{
1.69 + if (IsVistaOrLater()) {
1.70 + // RegisterPowerSettingNotification is from Vista or later.
1.71 + // Use this API if available.
1.72 + HMODULE hUser32 = GetModuleHandleW(L"USER32.DLL");
1.73 + if (!sRegisterPowerSettingNotification)
1.74 + sRegisterPowerSettingNotification = (decltype(RegisterPowerSettingNotification)*)
1.75 + GetProcAddress(hUser32, "RegisterPowerSettingNotification");
1.76 + if (!sUnregisterPowerSettingNotification)
1.77 + sUnregisterPowerSettingNotification = (decltype(UnregisterPowerSettingNotification)*)
1.78 + GetProcAddress(hUser32, "UnregisterPowerSettingNotification");
1.79 +
1.80 + if (!sRegisterPowerSettingNotification ||
1.81 + !sUnregisterPowerSettingNotification) {
1.82 + NS_ASSERTION(false, "Canot find PowerSettingNotification functions.");
1.83 + return;
1.84 + }
1.85 +
1.86 + // Create custom window to watch battery event
1.87 + // If we can get Gecko's window handle, this is unnecessary.
1.88 +
1.89 + if (sHWnd == nullptr) {
1.90 + WNDCLASSW wc;
1.91 + HMODULE hSelf = GetModuleHandle(nullptr);
1.92 +
1.93 + if (!GetClassInfoW(hSelf, L"MozillaBatteryClass", &wc)) {
1.94 + ZeroMemory(&wc, sizeof(WNDCLASSW));
1.95 + wc.hInstance = hSelf;
1.96 + wc.lpfnWndProc = BatteryWindowProc;
1.97 + wc.lpszClassName = L"MozillaBatteryClass";
1.98 + RegisterClassW(&wc);
1.99 + }
1.100 +
1.101 + sHWnd = CreateWindowW(L"MozillaBatteryClass", L"Battery Watcher",
1.102 + 0, 0, 0, 0, 0,
1.103 + nullptr, nullptr, hSelf, nullptr);
1.104 + }
1.105 +
1.106 + if (sHWnd == nullptr) {
1.107 + return;
1.108 + }
1.109 +
1.110 + sPowerHandle =
1.111 + sRegisterPowerSettingNotification(sHWnd,
1.112 + &GUID_ACDC_POWER_SOURCE,
1.113 + DEVICE_NOTIFY_WINDOW_HANDLE);
1.114 + sCapacityHandle =
1.115 + sRegisterPowerSettingNotification(sHWnd,
1.116 + &GUID_BATTERY_PERCENTAGE_REMAINING,
1.117 + DEVICE_NOTIFY_WINDOW_HANDLE);
1.118 + } else
1.119 + {
1.120 + // for Windows XP. If we remove Windows XP support,
1.121 + // we should remove timer-based power notification
1.122 + sUpdateTimer = do_CreateInstance(NS_TIMER_CONTRACTID);
1.123 + if (sUpdateTimer) {
1.124 + sUpdateTimer->InitWithFuncCallback(UpdateHandler,
1.125 + nullptr,
1.126 + Preferences::GetInt("dom.battery.timer",
1.127 + 30000 /* 30s */),
1.128 + nsITimer::TYPE_REPEATING_SLACK);
1.129 + }
1.130 + }
1.131 +}
1.132 +
1.133 +void
1.134 +DisableBatteryNotifications()
1.135 +{
1.136 + if (IsVistaOrLater()) {
1.137 + if (sPowerHandle) {
1.138 + sUnregisterPowerSettingNotification(sPowerHandle);
1.139 + sPowerHandle = nullptr;
1.140 + }
1.141 +
1.142 + if (sCapacityHandle) {
1.143 + sUnregisterPowerSettingNotification(sCapacityHandle);
1.144 + sCapacityHandle = nullptr;
1.145 + }
1.146 +
1.147 + if (sHWnd) {
1.148 + DestroyWindow(sHWnd);
1.149 + sHWnd = nullptr;
1.150 + }
1.151 + } else
1.152 + {
1.153 + if (sUpdateTimer) {
1.154 + sUpdateTimer->Cancel();
1.155 + sUpdateTimer = nullptr;
1.156 + }
1.157 + }
1.158 +}
1.159 +
1.160 +void
1.161 +GetCurrentBatteryInformation(hal::BatteryInformation* aBatteryInfo)
1.162 +{
1.163 + SYSTEM_POWER_STATUS status;
1.164 + if (!GetSystemPowerStatus(&status)) {
1.165 + aBatteryInfo->level() = kDefaultLevel;
1.166 + aBatteryInfo->charging() = kDefaultCharging;
1.167 + aBatteryInfo->remainingTime() = kDefaultRemainingTime;
1.168 + return;
1.169 + }
1.170 +
1.171 + aBatteryInfo->level() =
1.172 + status.BatteryLifePercent == 255 ? kDefaultLevel
1.173 + : ((double)status.BatteryLifePercent) / 100.0;
1.174 + aBatteryInfo->charging() = (status.ACLineStatus != 0);
1.175 + if (status.ACLineStatus != 0) {
1.176 + if (aBatteryInfo->level() == 1.0) {
1.177 + // GetSystemPowerStatus API may returns -1 for BatteryFullLifeTime.
1.178 + // So, if battery is 100%, set kDefaultRemainingTime at force.
1.179 + aBatteryInfo->remainingTime() = kDefaultRemainingTime;
1.180 + } else {
1.181 + aBatteryInfo->remainingTime() =
1.182 + status.BatteryFullLifeTime == (DWORD)-1 ? kUnknownRemainingTime
1.183 + : status.BatteryFullLifeTime;
1.184 + }
1.185 + } else {
1.186 + aBatteryInfo->remainingTime() =
1.187 + status.BatteryLifeTime == (DWORD)-1 ? kUnknownRemainingTime
1.188 + : status.BatteryLifeTime;
1.189 + }
1.190 +}
1.191 +
1.192 +} // hal_impl
1.193 +} // mozilla
