1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
31
32
33
34
35
36
37
38
39
40
41
42
43
44
45
46
47
48
49
50
51
52
53
54
55
56
57
58
59
60
61
62
63
64
65
66
67
68
69
70
71
72
73
74
75
76
77
78
79
80
81
82
83
84
85
86
87
88
89
90
91
92
93
94
95
96
97
98
99
100
101
102
103
104
105
106
107
108
109
110
111
112
113
114
115
116
117
118
119
120
121
122
123
124
125
126
127
|
/* -*- 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;
}
}
} // hal_impl
} // mozilla
|
