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| 1 // Copyright 2014 The Chromium Authors. All rights reserved. | |
| 2 // Use of this source code is governed by a BSD-style license that can be | |
| 3 // found in the LICENSE file. | |
| 4 | |
| 5 #include "device/battery/battery_status_manager_win.h" | |
| 6 | |
| 7 #include "base/bind.h" | |
| 8 #include "base/memory/scoped_ptr.h" | |
| 9 #include "base/metrics/histogram.h" | |
| 10 #include "base/strings/string16.h" | |
| 11 #include "base/win/message_window.h" | |
| 12 #include "base/win/windows_version.h" | |
| 13 #include "device/battery/battery_status_manager.h" | |
| 14 | |
| 15 namespace device { | |
| 16 | |
| 17 namespace { | |
| 18 | |
| 19 typedef BatteryStatusService::BatteryUpdateCallback BatteryCallback; | |
| 20 | |
| 21 const wchar_t kWindowClassName[] = L"BatteryStatusMessageWindow"; | |
| 22 | |
| 23 // This enum is used for histogram. Don't change the order of the existing | |
| 24 // values. | |
| 25 enum NumberBatteriesType { | |
| 26 UNKNOWN_BATTERIES = 0, | |
| 27 NO_BATTERY = 1, | |
| 28 ONE_OR_MORE_BATTERIES = 2, | |
| 29 BATTERY_TYPES_COUNT = 3, | |
| 30 }; | |
| 31 | |
| 32 void UpdateNumberBatteriesHistogram(NumberBatteriesType count) { | |
| 33 UMA_HISTOGRAM_ENUMERATION("BatteryStatus.NumberBatteriesWin", | |
| 34 count, | |
| 35 BATTERY_TYPES_COUNT); | |
| 36 } | |
| 37 | |
| 38 void UpdateNumberBatteriesHistogram() { | |
| 39 SYSTEM_POWER_STATUS win_status; | |
| 40 if (!GetSystemPowerStatus(&win_status)) { | |
| 41 UpdateNumberBatteriesHistogram(UNKNOWN_BATTERIES); | |
| 42 return; | |
| 43 } | |
| 44 | |
| 45 if (win_status.BatteryFlag == 255) | |
| 46 UpdateNumberBatteriesHistogram(UNKNOWN_BATTERIES); | |
| 47 else if (win_status.BatteryFlag == 128) | |
| 48 UpdateNumberBatteriesHistogram(NO_BATTERY); | |
| 49 else | |
| 50 UpdateNumberBatteriesHistogram(ONE_OR_MORE_BATTERIES); | |
| 51 } | |
| 52 | |
| 53 // Message-only window for handling battery changes on Windows. | |
| 54 class BatteryStatusObserver { | |
| 55 public: | |
| 56 explicit BatteryStatusObserver(const BatteryCallback& callback) | |
| 57 : power_handle_(NULL), | |
| 58 battery_change_handle_(NULL), | |
| 59 callback_(callback) { | |
| 60 } | |
| 61 | |
| 62 ~BatteryStatusObserver() { DCHECK(!window_); } | |
| 63 | |
| 64 void Start() { | |
| 65 if (CreateMessageWindow()) { | |
| 66 BatteryChanged(); | |
| 67 // RegisterPowerSettingNotification function work from Windows Vista | |
| 68 // onwards. However even without them we will receive notifications, | |
| 69 // e.g. when a power source is connected. | |
| 70 // TODO(timvolodine) : consider polling for battery changes on windows | |
| 71 // versions prior to Vista, see crbug.com/402466. | |
| 72 power_handle_ = | |
| 73 RegisterNotification(&GUID_ACDC_POWER_SOURCE); | |
| 74 battery_change_handle_ = | |
| 75 RegisterNotification(&GUID_BATTERY_PERCENTAGE_REMAINING); | |
| 76 } else { | |
| 77 // Could not create a message window, execute callback with the default | |
| 78 // values. | |
| 79 callback_.Run(BatteryStatus()); | |
| 80 } | |
| 81 | |
| 82 UpdateNumberBatteriesHistogram(); | |
| 83 } | |
| 84 | |
| 85 void Stop() { | |
| 86 if (power_handle_) | |
| 87 UnregisterNotification(power_handle_); | |
| 88 if (battery_change_handle_) | |
| 89 UnregisterNotification(battery_change_handle_); | |
| 90 window_.reset(); | |
| 91 } | |
| 92 | |
| 93 private: | |
| 94 void BatteryChanged() { | |
| 95 SYSTEM_POWER_STATUS win_status; | |
| 96 if (GetSystemPowerStatus(&win_status)) | |
| 97 callback_.Run(ComputeWebBatteryStatus(win_status)); | |
| 98 else | |
| 99 callback_.Run(BatteryStatus()); | |
| 100 } | |
| 101 | |
| 102 bool HandleMessage(UINT message, | |
| 103 WPARAM wparam, | |
| 104 LPARAM lparam, | |
| 105 LRESULT* result) { | |
| 106 switch(message) { | |
| 107 case WM_POWERBROADCAST: | |
| 108 if (wparam == PBT_APMPOWERSTATUSCHANGE || | |
| 109 wparam == PBT_POWERSETTINGCHANGE) { | |
| 110 BatteryChanged(); | |
| 111 } | |
| 112 *result = NULL; | |
| 113 return true; | |
| 114 default: | |
| 115 return false; | |
| 116 } | |
| 117 } | |
| 118 | |
| 119 HPOWERNOTIFY RegisterNotification(LPCGUID power_setting) { | |
| 120 if (base::win::GetVersion() < base::win::VERSION_VISTA) | |
| 121 return NULL; | |
| 122 | |
| 123 return RegisterPowerSettingNotification(window_->hwnd(), power_setting, | |
| 124 DEVICE_NOTIFY_WINDOW_HANDLE); | |
| 125 } | |
| 126 | |
| 127 BOOL UnregisterNotification(HPOWERNOTIFY handle) { | |
| 128 if (base::win::GetVersion() < base::win::VERSION_VISTA) | |
| 129 return FALSE; | |
| 130 | |
| 131 return UnregisterPowerSettingNotification(handle); | |
| 132 } | |
| 133 | |
| 134 bool CreateMessageWindow() { | |
| 135 // TODO(timvolodine): consider reusing the message window of PowerMonitor. | |
| 136 window_.reset(new base::win::MessageWindow()); | |
| 137 if (!window_->CreateNamed(base::Bind(&BatteryStatusObserver::HandleMessage, | |
| 138 base::Unretained(this)), | |
| 139 base::string16(kWindowClassName))) { | |
| 140 LOG(ERROR) << "Failed to create message window: " << kWindowClassName; | |
| 141 window_.reset(); | |
| 142 return false; | |
| 143 } | |
| 144 return true; | |
| 145 } | |
| 146 | |
| 147 HPOWERNOTIFY power_handle_; | |
| 148 HPOWERNOTIFY battery_change_handle_; | |
| 149 BatteryCallback callback_; | |
| 150 scoped_ptr<base::win::MessageWindow> window_; | |
| 151 | |
| 152 DISALLOW_COPY_AND_ASSIGN(BatteryStatusObserver); | |
| 153 }; | |
| 154 | |
| 155 class BatteryStatusManagerWin : public BatteryStatusManager { | |
| 156 public: | |
| 157 explicit BatteryStatusManagerWin(const BatteryCallback& callback) | |
| 158 : battery_observer_(new BatteryStatusObserver(callback)) {} | |
| 159 virtual ~BatteryStatusManagerWin() { battery_observer_->Stop(); } | |
| 160 | |
| 161 public: | |
| 162 // BatteryStatusManager: | |
| 163 virtual bool StartListeningBatteryChange() override { | |
| 164 battery_observer_->Start(); | |
| 165 return true; | |
| 166 } | |
| 167 | |
| 168 virtual void StopListeningBatteryChange() override { | |
| 169 battery_observer_->Stop(); | |
| 170 } | |
| 171 | |
| 172 private: | |
| 173 scoped_ptr<BatteryStatusObserver> battery_observer_; | |
| 174 | |
| 175 DISALLOW_COPY_AND_ASSIGN(BatteryStatusManagerWin); | |
| 176 }; | |
| 177 | |
| 178 } // namespace | |
| 179 | |
| 180 BatteryStatus ComputeWebBatteryStatus(const SYSTEM_POWER_STATUS& win_status) { | |
| 181 BatteryStatus status; | |
| 182 status.charging = win_status.ACLineStatus != WIN_AC_LINE_STATUS_OFFLINE; | |
| 183 | |
| 184 // Set level if available. Otherwise keep the default value which is 1. | |
| 185 if (win_status.BatteryLifePercent != 255) { | |
| 186 // Convert percentage to a value between 0 and 1 with 2 significant digits. | |
| 187 status.level = static_cast<double>(win_status.BatteryLifePercent) / 100.; | |
| 188 } | |
| 189 | |
| 190 if (!status.charging) { | |
| 191 // Set discharging_time if available otherwise keep the default value, | |
| 192 // which is +Infinity. | |
| 193 if (win_status.BatteryLifeTime != (DWORD)-1) | |
| 194 status.discharging_time = win_status.BatteryLifeTime; | |
| 195 status.charging_time = std::numeric_limits<double>::infinity(); | |
| 196 } else { | |
| 197 // Set charging_time to +Infinity if not fully charged, otherwise leave the | |
| 198 // default value, which is 0. | |
| 199 if (status.level < 1) | |
| 200 status.charging_time = std::numeric_limits<double>::infinity(); | |
| 201 } | |
| 202 return status; | |
| 203 } | |
| 204 | |
| 205 // static | |
| 206 scoped_ptr<BatteryStatusManager> BatteryStatusManager::Create( | |
| 207 const BatteryStatusService::BatteryUpdateCallback& callback) { | |
| 208 return scoped_ptr<BatteryStatusManager>( | |
| 209 new BatteryStatusManagerWin(callback)); | |
| 210 } | |
| 211 | |
| 212 } // namespace device | |
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Chromium Code Reviews
Issue 676953005:
Revert of Replace Chrome IPC with Mojo IPC for querying BatteryStatus service (Closed)
Base URL: https://chromium.googlesource.com/chromium/src.git@master