зеркало из https://github.com/mozilla/gecko-dev.git
128 строки
3.7 KiB
C++
128 строки
3.7 KiB
C++
/* -*- Mode: C++; tab-width: 2; indent-tabs-mode: nil; c-basic-offset: 2 -*- */
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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 "Hal.h"
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#include "HalImpl.h"
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#include "mozilla/Preferences.h"
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#include "mozilla/dom/battery/Constants.h"
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#include <windows.h>
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using namespace mozilla::dom::battery;
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namespace mozilla {
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namespace hal_impl {
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static HPOWERNOTIFY sPowerHandle = nullptr;
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static HPOWERNOTIFY sCapacityHandle = nullptr;
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static HWND sHWnd = nullptr;
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static
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LRESULT CALLBACK
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BatteryWindowProc(HWND hwnd, UINT msg, WPARAM wParam, LPARAM lParam) {
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if (msg != WM_POWERBROADCAST || wParam != PBT_POWERSETTINGCHANGE) {
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return DefWindowProc(hwnd, msg, wParam, lParam);
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}
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hal::BatteryInformation currentInfo;
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// Since we need update remainingTime, we cannot use LPARAM.
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hal_impl::GetCurrentBatteryInformation(¤tInfo);
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hal::NotifyBatteryChange(currentInfo);
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return TRUE;
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}
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void
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EnableBatteryNotifications()
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{
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// Create custom window to watch battery event
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// If we can get Gecko's window handle, this is unnecessary.
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if (sHWnd == nullptr) {
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WNDCLASSW wc;
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HMODULE hSelf = GetModuleHandle(nullptr);
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if (!GetClassInfoW(hSelf, L"MozillaBatteryClass", &wc)) {
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ZeroMemory(&wc, sizeof(WNDCLASSW));
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wc.hInstance = hSelf;
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wc.lpfnWndProc = BatteryWindowProc;
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wc.lpszClassName = L"MozillaBatteryClass";
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RegisterClassW(&wc);
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}
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sHWnd = CreateWindowW(L"MozillaBatteryClass", L"Battery Watcher",
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0, 0, 0, 0, 0,
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nullptr, nullptr, hSelf, nullptr);
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}
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if (sHWnd == nullptr) {
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return;
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}
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sPowerHandle =
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RegisterPowerSettingNotification(sHWnd,
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&GUID_ACDC_POWER_SOURCE,
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DEVICE_NOTIFY_WINDOW_HANDLE);
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sCapacityHandle =
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RegisterPowerSettingNotification(sHWnd,
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&GUID_BATTERY_PERCENTAGE_REMAINING,
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DEVICE_NOTIFY_WINDOW_HANDLE);
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}
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void
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DisableBatteryNotifications()
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{
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if (sPowerHandle) {
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UnregisterPowerSettingNotification(sPowerHandle);
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sPowerHandle = nullptr;
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}
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if (sCapacityHandle) {
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UnregisterPowerSettingNotification(sCapacityHandle);
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sCapacityHandle = nullptr;
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}
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if (sHWnd) {
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DestroyWindow(sHWnd);
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sHWnd = nullptr;
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}
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}
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void
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GetCurrentBatteryInformation(hal::BatteryInformation* aBatteryInfo)
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{
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SYSTEM_POWER_STATUS status;
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if (!GetSystemPowerStatus(&status)) {
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aBatteryInfo->level() = kDefaultLevel;
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aBatteryInfo->charging() = kDefaultCharging;
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aBatteryInfo->remainingTime() = kDefaultRemainingTime;
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return;
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}
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aBatteryInfo->level() =
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status.BatteryLifePercent == 255 ? kDefaultLevel
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: ((double)status.BatteryLifePercent) / 100.0;
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aBatteryInfo->charging() = (status.ACLineStatus != 0);
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if (status.ACLineStatus != 0) {
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if (aBatteryInfo->level() == 1.0) {
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// GetSystemPowerStatus API may returns -1 for BatteryFullLifeTime.
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// So, if battery is 100%, set kDefaultRemainingTime at force.
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aBatteryInfo->remainingTime() = kDefaultRemainingTime;
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} else {
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aBatteryInfo->remainingTime() =
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status.BatteryFullLifeTime == (DWORD)-1 ? kUnknownRemainingTime
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: status.BatteryFullLifeTime;
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}
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} else {
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aBatteryInfo->remainingTime() =
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status.BatteryLifeTime == (DWORD)-1 ? kUnknownRemainingTime
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: status.BatteryLifeTime;
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}
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}
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} // hal_impl
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} // mozilla
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