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-rw-r--r--hal/windows/WindowsBattery.cpp115
1 files changed, 115 insertions, 0 deletions
diff --git a/hal/windows/WindowsBattery.cpp b/hal/windows/WindowsBattery.cpp
new file mode 100644
index 0000000000..fba786c8a2
--- /dev/null
+++ b/hal/windows/WindowsBattery.cpp
@@ -0,0 +1,115 @@
+/* -*- 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(&currentInfo);
+
+ 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