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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 "content/browser/battery_status/battery_status_manager_win.h" | |
| 6 | |
| 7 #include "base/memory/ref_counted.h" | |
| 8 #include "base/metrics/histogram.h" | |
| 9 #include "base/strings/string16.h" | |
| 10 #include "base/win/message_window.h" | |
| 11 #include "base/win/windows_version.h" | |
| 12 #include "content/browser/battery_status/battery_status_manager.h" | |
| 13 #include "content/public/browser/browser_thread.h" | |
| 14 | |
| 15 namespace content { | |
| 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 base::RefCountedThreadSafe<BatteryStatusObserver> { | |
| 56 public: | |
| 57 explicit BatteryStatusObserver(const BatteryCallback& callback) | |
| 58 : power_handle_(NULL), | |
| 59 battery_change_handle_(NULL), | |
| 60 callback_(callback) { | |
| 61 } | |
| 62 | |
| 63 virtual ~BatteryStatusObserver() { DCHECK(!window_); } | |
| 64 | |
| 65 void Start() { | |
| 66 // Need to start on the UI thread to receive battery status notifications. | |
| 67 BrowserThread::PostTask( | |
| 68 BrowserThread::UI, | |
| 69 FROM_HERE, | |
| 70 base::Bind(&BatteryStatusObserver::StartOnUI, this)); | |
| 71 } | |
| 72 | |
| 73 void Stop() { | |
| 74 BrowserThread::PostTask( | |
| 75 BrowserThread::UI, | |
| 76 FROM_HERE, | |
| 77 base::Bind(&BatteryStatusObserver::StopOnUI, this)); | |
| 78 } | |
| 79 | |
| 80 private: | |
| 81 void StartOnUI() { | |
| 82 DCHECK(BrowserThread::CurrentlyOn(BrowserThread::UI)); | |
| 83 if (window_) | |
| 84 return; | |
| 85 | |
| 86 if (CreateMessageWindow()) { | |
| 87 BatteryChanged(); | |
| 88 // RegisterPowerSettingNotification function work from Windows Vista | |
| 89 // onwards. However even without them we will receive notifications, | |
| 90 // e.g. when a power source is connected. | |
| 91 // TODO(timvolodine) : consider polling for battery changes on windows | |
| 92 // versions prior to Vista, see crbug.com/402466. | |
| 93 power_handle_ = | |
| 94 RegisterNotification(&GUID_ACDC_POWER_SOURCE); | |
| 95 battery_change_handle_ = | |
| 96 RegisterNotification(&GUID_BATTERY_PERCENTAGE_REMAINING); | |
| 97 } else { | |
| 98 // Could not create a message window, execute callback with the default | |
| 99 // values. | |
| 100 callback_.Run(blink::WebBatteryStatus()); | |
| 101 } | |
| 102 | |
| 103 UpdateNumberBatteriesHistogram(); | |
| 104 } | |
| 105 | |
| 106 void StopOnUI() { | |
| 107 DCHECK(BrowserThread::CurrentlyOn(BrowserThread::UI)); | |
| 108 if (!window_) | |
| 109 return; | |
| 110 | |
| 111 if (power_handle_) | |
| 112 UnregisterNotification(power_handle_); | |
| 113 if (battery_change_handle_) | |
| 114 UnregisterNotification(battery_change_handle_); | |
| 115 window_.reset(); | |
| 116 } | |
| 117 | |
| 118 void BatteryChanged() { | |
| 119 SYSTEM_POWER_STATUS win_status; | |
| 120 if (GetSystemPowerStatus(&win_status)) | |
| 121 callback_.Run(ComputeWebBatteryStatus(win_status)); | |
| 122 else | |
| 123 callback_.Run(blink::WebBatteryStatus()); | |
| 124 } | |
| 125 | |
| 126 bool HandleMessage(UINT message, | |
| 127 WPARAM wparam, | |
| 128 LPARAM lparam, | |
| 129 LRESULT* result) { | |
| 130 switch(message) { | |
| 131 case WM_POWERBROADCAST: | |
| 132 if (wparam == PBT_APMPOWERSTATUSCHANGE || | |
| 133 wparam == PBT_POWERSETTINGCHANGE) { | |
| 134 BatteryChanged(); | |
| 135 } | |
| 136 *result = NULL; | |
| 137 return true; | |
| 138 default: | |
| 139 return false; | |
| 140 } | |
| 141 } | |
| 142 | |
| 143 HPOWERNOTIFY RegisterNotification(LPCGUID power_setting) { | |
| 144 if (base::win::GetVersion() < base::win::VERSION_VISTA) | |
| 145 return NULL; | |
| 146 | |
| 147 return RegisterPowerSettingNotification(window_->hwnd(), power_setting, | |
| 148 DEVICE_NOTIFY_WINDOW_HANDLE); | |
| 149 } | |
| 150 | |
| 151 BOOL UnregisterNotification(HPOWERNOTIFY handle) { | |
| 152 if (base::win::GetVersion() < base::win::VERSION_VISTA) | |
| 153 return FALSE; | |
| 154 | |
| 155 return UnregisterPowerSettingNotification(handle); | |
| 156 } | |
| 157 | |
| 158 bool CreateMessageWindow() { | |
| 159 // TODO(timvolodine): consider reusing the message window of PowerMonitor. | |
| 160 window_.reset(new base::win::MessageWindow()); | |
| 161 if (!window_->CreateNamed(base::Bind(&BatteryStatusObserver::HandleMessage, | |
| 162 base::Unretained(this)), | |
| 163 base::string16(kWindowClassName))) { | |
| 164 LOG(ERROR) << "Failed to create message window: " << kWindowClassName; | |
| 165 window_.reset(); | |
| 166 return false; | |
| 167 } | |
| 168 return true; | |
| 169 } | |
| 170 | |
| 171 HPOWERNOTIFY power_handle_; | |
| 172 HPOWERNOTIFY battery_change_handle_; | |
| 173 BatteryCallback callback_; | |
| 174 scoped_ptr<base::win::MessageWindow> window_; | |
| 175 | |
| 176 DISALLOW_COPY_AND_ASSIGN(BatteryStatusObserver); | |
| 177 }; | |
| 178 | |
| 179 class BatteryStatusManagerWin : public BatteryStatusManager { | |
| 180 public: | |
| 181 explicit BatteryStatusManagerWin(const BatteryCallback& callback) | |
| 182 : battery_observer_(new BatteryStatusObserver(callback)) {} | |
| 183 virtual ~BatteryStatusManagerWin() { battery_observer_->Stop(); } | |
| 184 | |
| 185 public: | |
| 186 // BatteryStatusManager: | |
| 187 virtual bool StartListeningBatteryChange() override { | |
| 188 DCHECK(BrowserThread::CurrentlyOn(BrowserThread::IO)); | |
| 189 battery_observer_->Start(); | |
| 190 return true; | |
| 191 } | |
| 192 | |
| 193 virtual void StopListeningBatteryChange() override { | |
| 194 DCHECK(BrowserThread::CurrentlyOn(BrowserThread::IO)); | |
| 195 battery_observer_->Stop(); | |
| 196 } | |
| 197 | |
| 198 private: | |
| 199 scoped_refptr<BatteryStatusObserver> battery_observer_; | |
| 200 | |
| 201 DISALLOW_COPY_AND_ASSIGN(BatteryStatusManagerWin); | |
| 202 }; | |
| 203 | |
| 204 } // namespace | |
| 205 | |
| 206 blink::WebBatteryStatus ComputeWebBatteryStatus( | |
| 207 const SYSTEM_POWER_STATUS& win_status) { | |
| 208 blink::WebBatteryStatus status; | |
| 209 status.charging = win_status.ACLineStatus != WIN_AC_LINE_STATUS_OFFLINE; | |
| 210 | |
| 211 // Set level if available. Otherwise keep the default value which is 1. | |
| 212 if (win_status.BatteryLifePercent != 255) { | |
| 213 // Convert percentage to a value between 0 and 1 with 2 significant digits. | |
| 214 status.level = static_cast<double>(win_status.BatteryLifePercent) / 100.; | |
| 215 } | |
| 216 | |
| 217 if (!status.charging) { | |
| 218 // Set dischargingTime if available otherwise keep the default value, | |
| 219 // which is +Infinity. | |
| 220 if (win_status.BatteryLifeTime != (DWORD)-1) | |
| 221 status.dischargingTime = win_status.BatteryLifeTime; | |
| 222 status.chargingTime = std::numeric_limits<double>::infinity(); | |
| 223 } else { | |
| 224 // Set chargingTime to +Infinity if not fully charged, otherwise leave the | |
| 225 // default value, which is 0. | |
| 226 if (status.level < 1) | |
| 227 status.chargingTime = std::numeric_limits<double>::infinity(); | |
| 228 } | |
| 229 return status; | |
| 230 } | |
| 231 | |
| 232 // static | |
| 233 scoped_ptr<BatteryStatusManager> BatteryStatusManager::Create( | |
| 234 const BatteryStatusService::BatteryUpdateCallback& callback) { | |
| 235 return scoped_ptr<BatteryStatusManager>( | |
| 236 new BatteryStatusManagerWin(callback)); | |
| 237 } | |
| 238 | |
| 239 } // namespace content | |
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Chromium Code Reviews
Issue 685703002:
Reland "Replace Chrome IPC with Mojo IPC for querying BatteryStatus service" (Closed)
Base URL: https://chromium.googlesource.com/chromium/src.git@master