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
128
129
130
131
132
133
134
135
136
137
138
139
140
141
142
143
144
145
146
147
148
149
150
151
152
153
154
155
156
157
158
159
160
161
162
163
164
165
166
167
168
169
170
171
172
173
174
175
176
177
178
179
180
181
182
183
184
185
186
187
188
189
190
|
/* -*- 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 "nsITimer.h"
#include "mozilla/Preferences.h"
#include "mozilla/dom/battery/Constants.h"
#include "nsComponentManagerUtils.h"
#include <windows.h>
#include "mozilla/WindowsVersion.h"
using namespace mozilla::dom::battery;
namespace mozilla {
namespace hal_impl {
static nsCOMPtr<nsITimer> sUpdateTimer;
/* Power Event API is Vista or later */
static decltype(RegisterPowerSettingNotification)* sRegisterPowerSettingNotification = nullptr;
static decltype(UnregisterPowerSettingNotification)* sUnregisterPowerSettingNotification = nullptr;
static HPOWERNOTIFY sPowerHandle = nullptr;
static HPOWERNOTIFY sCapacityHandle = nullptr;
static HWND sHWnd = nullptr;
static void
UpdateHandler(nsITimer* aTimer, void* aClosure) {
NS_ASSERTION(!IsVistaOrLater(),
"We shouldn't call this function for Vista or later version!");
static hal::BatteryInformation sLastInfo;
hal::BatteryInformation currentInfo;
hal_impl::GetCurrentBatteryInformation(¤tInfo);
if (sLastInfo.level() != currentInfo.level() ||
sLastInfo.charging() != currentInfo.charging() ||
sLastInfo.remainingTime() != currentInfo.remainingTime()) {
hal::NotifyBatteryChange(currentInfo);
sLastInfo = currentInfo;
}
}
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()
{
if (IsVistaOrLater()) {
// RegisterPowerSettingNotification is from Vista or later.
// Use this API if available.
HMODULE hUser32 = GetModuleHandleW(L"USER32.DLL");
if (!sRegisterPowerSettingNotification)
sRegisterPowerSettingNotification = (decltype(RegisterPowerSettingNotification)*)
GetProcAddress(hUser32, "RegisterPowerSettingNotification");
if (!sUnregisterPowerSettingNotification)
sUnregisterPowerSettingNotification = (decltype(UnregisterPowerSettingNotification)*)
GetProcAddress(hUser32, "UnregisterPowerSettingNotification");
if (!sRegisterPowerSettingNotification ||
!sUnregisterPowerSettingNotification) {
NS_ASSERTION(false, "Canot find PowerSettingNotification functions.");
return;
}
// 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 =
sRegisterPowerSettingNotification(sHWnd,
&GUID_ACDC_POWER_SOURCE,
DEVICE_NOTIFY_WINDOW_HANDLE);
sCapacityHandle =
sRegisterPowerSettingNotification(sHWnd,
&GUID_BATTERY_PERCENTAGE_REMAINING,
DEVICE_NOTIFY_WINDOW_HANDLE);
} else
{
// for Windows XP. If we remove Windows XP support,
// we should remove timer-based power notification
sUpdateTimer = do_CreateInstance(NS_TIMER_CONTRACTID);
if (sUpdateTimer) {
sUpdateTimer->InitWithFuncCallback(UpdateHandler,
nullptr,
Preferences::GetInt("dom.battery.timer",
30000 /* 30s */),
nsITimer::TYPE_REPEATING_SLACK);
}
}
}
void
DisableBatteryNotifications()
{
if (IsVistaOrLater()) {
if (sPowerHandle) {
sUnregisterPowerSettingNotification(sPowerHandle);
sPowerHandle = nullptr;
}
if (sCapacityHandle) {
sUnregisterPowerSettingNotification(sCapacityHandle);
sCapacityHandle = nullptr;
}
if (sHWnd) {
DestroyWindow(sHWnd);
sHWnd = nullptr;
}
} else
{
if (sUpdateTimer) {
sUpdateTimer->Cancel();
sUpdateTimer = 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
|
