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/* -*- 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 "Hal.h"
#include "HalImpl.h"
#include "mozilla/Preferences.h"
#include "mozilla/dom/battery/Constants.h"
#include <windows.h>
using namespace mozilla::dom::battery;
namespace mozilla {
namespace hal_impl {
static HPOWERNOTIFY sPowerHandle = nullptr;
static HPOWERNOTIFY sCapacityHandle = nullptr;
static HWND sHWnd = nullptr;
static LRESULT CALLBACK BatteryWindowProc(HWND hwnd, UINT msg, WPARAM wParam,
LPARAM lParam) {
if (msg != WM_POWERBROADCAST || wParam != PBT_POWERSETTINGCHANGE) {
return DefWindowProc(hwnd, msg, wParam, lParam);
}
hal::BatteryInformation currentInfo;
// Since we need update remainingTime, we cannot use LPARAM.
hal_impl::GetCurrentBatteryInformation(¤tInfo);
hal::NotifyBatteryChange(currentInfo);
return TRUE;
}
void EnableBatteryNotifications() {
// Create custom window to watch battery event
// If we can get Gecko's window handle, this is unnecessary.
if (sHWnd == nullptr) {
WNDCLASSW wc;
HMODULE hSelf = GetModuleHandle(nullptr);
if (!GetClassInfoW(hSelf, L"MozillaBatteryClass", &wc)) {
ZeroMemory(&wc, sizeof(WNDCLASSW));
wc.hInstance = hSelf;
wc.lpfnWndProc = BatteryWindowProc;
wc.lpszClassName = L"MozillaBatteryClass";
RegisterClassW(&wc);
}
sHWnd = CreateWindowW(L"MozillaBatteryClass", L"Battery Watcher", 0, 0, 0,
0, 0, nullptr, nullptr, hSelf, nullptr);
}
if (sHWnd == nullptr) {
return;
}
sPowerHandle = RegisterPowerSettingNotification(
sHWnd, &GUID_ACDC_POWER_SOURCE, DEVICE_NOTIFY_WINDOW_HANDLE);
sCapacityHandle = RegisterPowerSettingNotification(
sHWnd, &GUID_BATTERY_PERCENTAGE_REMAINING, DEVICE_NOTIFY_WINDOW_HANDLE);
}
void DisableBatteryNotifications() {
if (sPowerHandle) {
UnregisterPowerSettingNotification(sPowerHandle);
sPowerHandle = nullptr;
}
if (sCapacityHandle) {
UnregisterPowerSettingNotification(sCapacityHandle);
sCapacityHandle = nullptr;
}
if (sHWnd) {
DestroyWindow(sHWnd);
sHWnd = nullptr;
}
}
void GetCurrentBatteryInformation(hal::BatteryInformation* aBatteryInfo) {
SYSTEM_POWER_STATUS status;
if (!GetSystemPowerStatus(&status)) {
aBatteryInfo->level() = kDefaultLevel;
aBatteryInfo->charging() = kDefaultCharging;
aBatteryInfo->remainingTime() = kDefaultRemainingTime;
return;
}
aBatteryInfo->level() = status.BatteryLifePercent == 255
? kDefaultLevel
: ((double)status.BatteryLifePercent) / 100.0;
aBatteryInfo->charging() = (status.ACLineStatus != 0);
if (status.ACLineStatus != 0) {
if (aBatteryInfo->level() == 1.0) {
// GetSystemPowerStatus API may returns -1 for BatteryFullLifeTime.
// So, if battery is 100%, set kDefaultRemainingTime at force.
aBatteryInfo->remainingTime() = kDefaultRemainingTime;
} else {
aBatteryInfo->remainingTime() = status.BatteryFullLifeTime == (DWORD)-1
? kUnknownRemainingTime
: status.BatteryFullLifeTime;
}
} else {
aBatteryInfo->remainingTime() = status.BatteryLifeTime == (DWORD)-1
? kUnknownRemainingTime
: status.BatteryLifeTime;
}
}
} // namespace hal_impl
} // namespace mozilla
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