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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_linux.h" | |
| 6 | |
| 7 #include <stddef.h> | |
| 8 #include <stdint.h> | |
| 9 | |
| 10 #include <limits> | |
| 11 #include <memory> | |
| 12 #include <string> | |
| 13 #include <utility> | |
| 14 #include <vector> | |
| 15 | |
| 16 #include "base/macros.h" | |
| 17 #include "base/metrics/histogram_macros.h" | |
| 18 #include "base/single_thread_task_runner.h" | |
| 19 #include "base/threading/thread.h" | |
| 20 #include "base/values.h" | |
| 21 #include "base/version.h" | |
| 22 #include "dbus/bus.h" | |
| 23 #include "dbus/message.h" | |
| 24 #include "dbus/object_path.h" | |
| 25 #include "dbus/object_proxy.h" | |
| 26 #include "dbus/property.h" | |
| 27 #include "dbus/values_util.h" | |
| 28 #include "device/battery/battery_status_manager_linux-inl.h" | |
| 29 | |
| 30 namespace device { | |
| 31 namespace { | |
| 32 const char kBatteryNotifierThreadName[] = "BatteryStatusNotifier"; | |
| 33 | |
| 34 class UPowerProperties : public dbus::PropertySet { | |
| 35 public: | |
| 36 UPowerProperties(dbus::ObjectProxy* object_proxy, | |
| 37 const PropertyChangedCallback callback); | |
| 38 ~UPowerProperties() override; | |
| 39 | |
| 40 base::Version daemon_version(); | |
| 41 | |
| 42 private: | |
| 43 dbus::Property<std::string> daemon_version_; | |
| 44 | |
| 45 DISALLOW_COPY_AND_ASSIGN(UPowerProperties); | |
| 46 }; | |
| 47 | |
| 48 UPowerProperties::UPowerProperties(dbus::ObjectProxy* object_proxy, | |
| 49 const PropertyChangedCallback callback) | |
| 50 : dbus::PropertySet(object_proxy, kUPowerInterfaceName, callback) { | |
| 51 RegisterProperty(kUPowerPropertyDaemonVersion, &daemon_version_); | |
| 52 } | |
| 53 | |
| 54 UPowerProperties::~UPowerProperties() {} | |
| 55 | |
| 56 base::Version UPowerProperties::daemon_version() { | |
| 57 return (daemon_version_.is_valid() || daemon_version_.GetAndBlock()) | |
| 58 ? base::Version(daemon_version_.value()) | |
| 59 : base::Version(); | |
| 60 } | |
| 61 | |
| 62 class UPowerObject { | |
| 63 public: | |
| 64 using PropertyChangedCallback = dbus::PropertySet::PropertyChangedCallback; | |
| 65 | |
| 66 UPowerObject(dbus::Bus* dbus, | |
| 67 const PropertyChangedCallback property_changed_callback); | |
| 68 ~UPowerObject(); | |
| 69 | |
| 70 std::vector<dbus::ObjectPath> EnumerateDevices(); | |
| 71 dbus::ObjectPath GetDisplayDevice(); | |
| 72 | |
| 73 dbus::ObjectProxy* proxy() { return proxy_; } | |
| 74 UPowerProperties* properties() { return properties_.get(); } | |
| 75 | |
| 76 private: | |
| 77 dbus::Bus* dbus_; // Owned by the BatteryStatusNotificationThread. | |
| 78 dbus::ObjectProxy* proxy_; // Owned by the dbus. | |
| 79 std::unique_ptr<UPowerProperties> properties_; | |
| 80 | |
| 81 DISALLOW_COPY_AND_ASSIGN(UPowerObject); | |
| 82 }; | |
| 83 | |
| 84 UPowerObject::UPowerObject( | |
| 85 dbus::Bus* dbus, | |
| 86 const PropertyChangedCallback property_changed_callback) | |
| 87 : dbus_(dbus), | |
| 88 proxy_(dbus_->GetObjectProxy(kUPowerServiceName, | |
| 89 dbus::ObjectPath(kUPowerPath))), | |
| 90 properties_(new UPowerProperties(proxy_, property_changed_callback)) {} | |
| 91 | |
| 92 UPowerObject::~UPowerObject() { | |
| 93 properties_.reset(); // before the proxy is deleted. | |
| 94 dbus_->RemoveObjectProxy(kUPowerServiceName, proxy_->object_path(), | |
| 95 base::Bind(&base::DoNothing)); | |
| 96 } | |
| 97 | |
| 98 std::vector<dbus::ObjectPath> UPowerObject::EnumerateDevices() { | |
| 99 std::vector<dbus::ObjectPath> paths; | |
| 100 dbus::MethodCall method_call(kUPowerServiceName, | |
| 101 kUPowerMethodEnumerateDevices); | |
| 102 std::unique_ptr<dbus::Response> response(proxy_->CallMethodAndBlock( | |
| 103 &method_call, dbus::ObjectProxy::TIMEOUT_USE_DEFAULT)); | |
| 104 | |
| 105 if (response) { | |
| 106 dbus::MessageReader reader(response.get()); | |
| 107 reader.PopArrayOfObjectPaths(&paths); | |
| 108 } | |
| 109 return paths; | |
| 110 } | |
| 111 | |
| 112 dbus::ObjectPath UPowerObject::GetDisplayDevice() { | |
| 113 dbus::ObjectPath display_device_path; | |
| 114 if (!proxy_) | |
| 115 return display_device_path; | |
| 116 | |
| 117 dbus::MethodCall method_call(kUPowerServiceName, | |
| 118 kUPowerMethodGetDisplayDevice); | |
| 119 std::unique_ptr<dbus::Response> response(proxy_->CallMethodAndBlock( | |
| 120 &method_call, dbus::ObjectProxy::TIMEOUT_USE_DEFAULT)); | |
| 121 | |
| 122 if (response) { | |
| 123 dbus::MessageReader reader(response.get()); | |
| 124 reader.PopObjectPath(&display_device_path); | |
| 125 } | |
| 126 return display_device_path; | |
| 127 } | |
| 128 | |
| 129 void UpdateNumberBatteriesHistogram(int count) { | |
| 130 UMA_HISTOGRAM_CUSTOM_COUNTS( | |
| 131 "BatteryStatus.NumberBatteriesLinux", count, 1, 5, 6); | |
| 132 } | |
| 133 | |
| 134 class BatteryProperties : public dbus::PropertySet { | |
| 135 public: | |
| 136 BatteryProperties(dbus::ObjectProxy* object_proxy, | |
| 137 const PropertyChangedCallback callback); | |
| 138 ~BatteryProperties() override; | |
| 139 | |
| 140 void ConnectSignals() override; | |
| 141 | |
| 142 void Invalidate(); | |
| 143 | |
| 144 bool is_present(bool default_value = false); | |
| 145 double percentage(double default_value = 100); | |
| 146 uint32_t state(uint32_t default_value = UPOWER_DEVICE_STATE_UNKNOWN); | |
| 147 int64_t time_to_empty(int64_t default_value = 0); | |
| 148 int64_t time_to_full(int64_t default_value = 0); | |
| 149 uint32_t type(uint32_t default_value = UPOWER_DEVICE_TYPE_UNKNOWN); | |
| 150 | |
| 151 private: | |
| 152 bool connected_ = false; | |
| 153 dbus::Property<bool> is_present_; | |
| 154 dbus::Property<double> percentage_; | |
| 155 dbus::Property<uint32_t> state_; | |
| 156 dbus::Property<int64_t> time_to_empty_; | |
| 157 dbus::Property<int64_t> time_to_full_; | |
| 158 dbus::Property<uint32_t> type_; | |
| 159 | |
| 160 DISALLOW_COPY_AND_ASSIGN(BatteryProperties); | |
| 161 }; | |
| 162 | |
| 163 BatteryProperties::BatteryProperties(dbus::ObjectProxy* object_proxy, | |
| 164 const PropertyChangedCallback callback) | |
| 165 : dbus::PropertySet(object_proxy, kUPowerDeviceInterfaceName, callback) { | |
| 166 RegisterProperty(kUPowerDevicePropertyIsPresent, &is_present_); | |
| 167 RegisterProperty(kUPowerDevicePropertyPercentage, &percentage_); | |
| 168 RegisterProperty(kUPowerDevicePropertyState, &state_); | |
| 169 RegisterProperty(kUPowerDevicePropertyTimeToEmpty, &time_to_empty_); | |
| 170 RegisterProperty(kUPowerDevicePropertyTimeToFull, &time_to_full_); | |
| 171 RegisterProperty(kUPowerDevicePropertyType, &type_); | |
| 172 } | |
| 173 | |
| 174 BatteryProperties::~BatteryProperties() {} | |
| 175 | |
| 176 void BatteryProperties::ConnectSignals() { | |
| 177 if (!connected_) { | |
| 178 connected_ = true; | |
| 179 dbus::PropertySet::ConnectSignals(); | |
| 180 } | |
| 181 } | |
| 182 | |
| 183 void BatteryProperties::Invalidate() { | |
| 184 is_present_.set_valid(false); | |
| 185 percentage_.set_valid(false); | |
| 186 state_.set_valid(false); | |
| 187 time_to_empty_.set_valid(false); | |
| 188 time_to_full_.set_valid(false); | |
| 189 type_.set_valid(false); | |
| 190 } | |
| 191 | |
| 192 bool BatteryProperties::is_present(bool default_value) { | |
| 193 return (is_present_.is_valid() || is_present_.GetAndBlock()) | |
| 194 ? is_present_.value() | |
| 195 : default_value; | |
| 196 } | |
| 197 | |
| 198 double BatteryProperties::percentage(double default_value) { | |
| 199 return (percentage_.is_valid() || percentage_.GetAndBlock()) | |
| 200 ? percentage_.value() | |
| 201 : default_value; | |
| 202 } | |
| 203 | |
| 204 uint32_t BatteryProperties::state(uint32_t default_value) { | |
| 205 return (state_.is_valid() || state_.GetAndBlock()) ? state_.value() | |
| 206 : default_value; | |
| 207 } | |
| 208 | |
| 209 int64_t BatteryProperties::time_to_empty(int64_t default_value) { | |
| 210 return (time_to_empty_.is_valid() || time_to_empty_.GetAndBlock()) | |
| 211 ? time_to_empty_.value() | |
| 212 : default_value; | |
| 213 } | |
| 214 | |
| 215 int64_t BatteryProperties::time_to_full(int64_t default_value) { | |
| 216 return (time_to_full_.is_valid() || time_to_full_.GetAndBlock()) | |
| 217 ? time_to_full_.value() | |
| 218 : default_value; | |
| 219 } | |
| 220 | |
| 221 uint32_t BatteryProperties::type(uint32_t default_value) { | |
| 222 return (type_.is_valid() || type_.GetAndBlock()) ? type_.value() | |
| 223 : default_value; | |
| 224 } | |
| 225 | |
| 226 class BatteryObject { | |
| 227 public: | |
| 228 using PropertyChangedCallback = dbus::PropertySet::PropertyChangedCallback; | |
| 229 | |
| 230 BatteryObject(dbus::Bus* dbus, | |
| 231 const dbus::ObjectPath& device_path, | |
| 232 const PropertyChangedCallback& property_changed_callback); | |
| 233 ~BatteryObject(); | |
| 234 | |
| 235 bool IsValid(); | |
| 236 | |
| 237 dbus::ObjectProxy* proxy() { return proxy_; } | |
| 238 BatteryProperties* properties() { return properties_.get(); } | |
| 239 | |
| 240 private: | |
| 241 dbus::Bus* dbus_; // Owned by the BatteryStatusNotificationThread, | |
| 242 dbus::ObjectProxy* proxy_; // Owned by the dbus. | |
| 243 std::unique_ptr<BatteryProperties> properties_; | |
| 244 | |
| 245 DISALLOW_COPY_AND_ASSIGN(BatteryObject); | |
| 246 }; | |
| 247 | |
| 248 BatteryObject::BatteryObject( | |
| 249 dbus::Bus* dbus, | |
| 250 const dbus::ObjectPath& device_path, | |
| 251 const PropertyChangedCallback& property_changed_callback) | |
| 252 : dbus_(dbus), | |
| 253 proxy_(dbus_->GetObjectProxy(kUPowerServiceName, device_path)), | |
| 254 properties_(new BatteryProperties(proxy_, property_changed_callback)) {} | |
| 255 | |
| 256 BatteryObject::~BatteryObject() { | |
| 257 properties_.reset(); // before the proxy is deleted. | |
| 258 dbus_->RemoveObjectProxy(kUPowerServiceName, proxy_->object_path(), | |
| 259 base::Bind(&base::DoNothing)); | |
| 260 } | |
| 261 | |
| 262 bool BatteryObject::IsValid() { | |
| 263 return properties_->is_present() && | |
| 264 properties_->type() == UPOWER_DEVICE_TYPE_BATTERY; | |
| 265 } | |
| 266 | |
| 267 mojom::BatteryStatus ComputeWebBatteryStatus(BatteryProperties* properties) { | |
| 268 mojom::BatteryStatus status; | |
| 269 uint32_t state = properties->state(); | |
| 270 status.charging = state != UPOWER_DEVICE_STATE_DISCHARGING && | |
| 271 state != UPOWER_DEVICE_STATE_EMPTY; | |
| 272 // Convert percentage to a value between 0 and 1 with 2 digits of precision. | |
| 273 // This is to bring it in line with other platforms like Mac and Android where | |
| 274 // we report level with 1% granularity. It also serves the purpose of reducing | |
| 275 // the possibility of fingerprinting and triggers less level change events on | |
| 276 // the blink side. | |
| 277 // TODO(timvolodine): consider moving this rounding to the blink side. | |
| 278 status.level = round(properties->percentage()) / 100.f; | |
| 279 | |
| 280 switch (state) { | |
| 281 case UPOWER_DEVICE_STATE_CHARGING: { | |
| 282 int64_t time_to_full = properties->time_to_full(); | |
| 283 status.charging_time = (time_to_full > 0) | |
| 284 ? time_to_full | |
| 285 : std::numeric_limits<double>::infinity(); | |
| 286 break; | |
| 287 } | |
| 288 case UPOWER_DEVICE_STATE_DISCHARGING: { | |
| 289 int64_t time_to_empty = properties->time_to_empty(); | |
| 290 // Set dischargingTime if it's available. Otherwise leave the default | |
| 291 // value which is +infinity. | |
| 292 if (time_to_empty > 0) | |
| 293 status.discharging_time = time_to_empty; | |
| 294 status.charging_time = std::numeric_limits<double>::infinity(); | |
| 295 break; | |
| 296 } | |
| 297 case UPOWER_DEVICE_STATE_FULL: { | |
| 298 break; | |
| 299 } | |
| 300 default: { status.charging_time = std::numeric_limits<double>::infinity(); } | |
| 301 } | |
| 302 return status; | |
| 303 } | |
| 304 | |
| 305 } // namespace | |
| 306 | |
| 307 // Class that represents a dedicated thread which communicates with DBus to | |
| 308 // obtain battery information and receives battery change notifications. | |
| 309 class BatteryStatusManagerLinux::BatteryStatusNotificationThread | |
| 310 : public base::Thread { | |
| 311 public: | |
| 312 BatteryStatusNotificationThread( | |
| 313 const BatteryStatusService::BatteryUpdateCallback& callback) | |
| 314 : base::Thread(kBatteryNotifierThreadName), callback_(callback) {} | |
| 315 | |
| 316 ~BatteryStatusNotificationThread() override { | |
| 317 // Make sure to shutdown the dbus connection if it is still open in the very | |
| 318 // end. It needs to happen on the BatteryStatusNotificationThread. | |
| 319 message_loop()->task_runner()->PostTask( | |
| 320 FROM_HERE, | |
| 321 base::Bind(&BatteryStatusNotificationThread::ShutdownDBusConnection, | |
| 322 base::Unretained(this))); | |
| 323 | |
| 324 // Drain the message queue of the BatteryStatusNotificationThread and stop. | |
| 325 Stop(); | |
| 326 } | |
| 327 | |
| 328 void StartListening() { | |
| 329 DCHECK(OnWatcherThread()); | |
| 330 | |
| 331 if (upower_) | |
| 332 return; | |
| 333 | |
| 334 if (!system_bus_) | |
| 335 InitDBus(); | |
| 336 | |
| 337 upower_ = base::MakeUnique<UPowerObject>( | |
| 338 system_bus_.get(), UPowerObject::PropertyChangedCallback()); | |
| 339 upower_->proxy()->ConnectToSignal( | |
| 340 kUPowerServiceName, kUPowerSignalDeviceAdded, | |
| 341 base::Bind(&BatteryStatusNotificationThread::DeviceAdded, | |
| 342 base::Unretained(this)), | |
| 343 base::Bind(&BatteryStatusNotificationThread::OnSignalConnected, | |
| 344 base::Unretained(this))); | |
| 345 upower_->proxy()->ConnectToSignal( | |
| 346 kUPowerServiceName, kUPowerSignalDeviceRemoved, | |
| 347 base::Bind(&BatteryStatusNotificationThread::DeviceRemoved, | |
| 348 base::Unretained(this)), | |
| 349 base::Bind(&BatteryStatusNotificationThread::OnSignalConnected, | |
| 350 base::Unretained(this))); | |
| 351 | |
| 352 FindBatteryDevice(); | |
| 353 } | |
| 354 | |
| 355 void StopListening() { | |
| 356 DCHECK(OnWatcherThread()); | |
| 357 ShutdownDBusConnection(); | |
| 358 } | |
| 359 | |
| 360 void SetDBusForTesting(dbus::Bus* bus) { system_bus_ = bus; } | |
| 361 | |
| 362 private: | |
| 363 bool OnWatcherThread() { | |
| 364 return task_runner()->BelongsToCurrentThread(); | |
| 365 } | |
| 366 | |
| 367 void InitDBus() { | |
| 368 DCHECK(OnWatcherThread()); | |
| 369 | |
| 370 dbus::Bus::Options options; | |
| 371 options.bus_type = dbus::Bus::SYSTEM; | |
| 372 options.connection_type = dbus::Bus::PRIVATE; | |
| 373 system_bus_ = new dbus::Bus(options); | |
| 374 } | |
| 375 | |
| 376 bool IsDaemonVersionBelow_0_99() { | |
| 377 base::Version daemon_version = upower_->properties()->daemon_version(); | |
| 378 return daemon_version.IsValid() && | |
| 379 daemon_version.CompareTo(base::Version("0.99")) < 0; | |
| 380 } | |
| 381 | |
| 382 void FindBatteryDevice() { | |
| 383 // Move the currently watched battery_ device to a stack-local variable such | |
| 384 // that we can enumerate all devices (once more): | |
| 385 // first testing the display device, then testing all devices from | |
| 386 // EnumerateDevices. We will monitor the first battery device we find. | |
| 387 // - That may be the same device we did monitor on entering this method; | |
| 388 // then we'll use the same BatteryObject instance, that was moved to | |
| 389 // current - see UseCurrentOrCreateBattery(). | |
| 390 // - Or it may be a new device; then the previously monitored BatteryObject | |
| 391 // instance (if any) is released on leaving this function. | |
| 392 // - Or we may not find a battery device; then on leaving this function | |
| 393 // battery_ will be nullptr and the previously monitored BatteryObject | |
| 394 // instance (if any) is no longer a battery and will be released. | |
| 395 std::unique_ptr<BatteryObject> current = std::move(battery_); | |
| 396 auto UseCurrentOrCreateBattery = | |
| 397 [¤t, this](const dbus::ObjectPath& device_path) { | |
| 398 if (current && current->proxy()->object_path() == device_path) | |
| 399 return std::move(current); | |
| 400 return CreateBattery(device_path); | |
| 401 }; | |
| 402 | |
| 403 dbus::ObjectPath display_device_path; | |
| 404 if (!IsDaemonVersionBelow_0_99()) | |
| 405 display_device_path = upower_->GetDisplayDevice(); | |
| 406 if (display_device_path.IsValid()) { | |
| 407 auto battery = UseCurrentOrCreateBattery(display_device_path); | |
| 408 if (battery->IsValid()) | |
| 409 battery_ = std::move(battery); | |
| 410 } | |
| 411 | |
| 412 if (!battery_) { | |
| 413 int num_batteries = 0; | |
| 414 for (const auto& device_path : upower_->EnumerateDevices()) { | |
| 415 auto battery = UseCurrentOrCreateBattery(device_path); | |
| 416 if (!battery->IsValid()) | |
| 417 continue; | |
| 418 | |
| 419 if (battery_) { | |
| 420 // TODO(timvolodine): add support for multiple batteries. Currently we | |
| 421 // only collect information from the first battery we encounter | |
| 422 // (crbug.com/400780). | |
| 423 LOG(WARNING) << "multiple batteries found, " | |
| 424 << "using status data of the first battery only."; | |
| 425 } else { | |
| 426 battery_ = std::move(battery); | |
| 427 } | |
| 428 num_batteries++; | |
| 429 } | |
| 430 | |
| 431 UpdateNumberBatteriesHistogram(num_batteries); | |
| 432 } | |
| 433 | |
| 434 if (!battery_) { | |
| 435 callback_.Run(mojom::BatteryStatus()); | |
| 436 return; | |
| 437 } | |
| 438 | |
| 439 battery_->properties()->ConnectSignals(); | |
| 440 NotifyBatteryStatus(); | |
| 441 | |
| 442 if (IsDaemonVersionBelow_0_99()) { | |
| 443 // UPower Version 0.99 replaced the Changed signal with the | |
| 444 // PropertyChanged signal. For older versions we need to listen | |
| 445 // to the Changed signal. | |
| 446 battery_->proxy()->ConnectToSignal( | |
| 447 kUPowerDeviceInterfaceName, kUPowerDeviceSignalChanged, | |
| 448 base::Bind(&BatteryStatusNotificationThread::BatteryChanged, | |
| 449 base::Unretained(this)), | |
| 450 base::Bind(&BatteryStatusNotificationThread::OnSignalConnected, | |
| 451 base::Unretained(this))); | |
| 452 } | |
| 453 } | |
| 454 | |
| 455 void ShutdownDBusConnection() { | |
| 456 DCHECK(OnWatcherThread()); | |
| 457 | |
| 458 if (!system_bus_.get()) | |
| 459 return; | |
| 460 | |
| 461 battery_.reset(); // before the system_bus_ is shut down. | |
| 462 upower_.reset(); | |
| 463 | |
| 464 // Shutdown DBus connection later because there may be pending tasks on | |
| 465 // this thread. | |
| 466 message_loop()->task_runner()->PostTask( | |
| 467 FROM_HERE, base::Bind(&dbus::Bus::ShutdownAndBlock, system_bus_)); | |
| 468 system_bus_ = NULL; | |
| 469 } | |
| 470 | |
| 471 void OnSignalConnected(const std::string& interface_name, | |
| 472 const std::string& signal_name, | |
| 473 bool success) {} | |
| 474 | |
| 475 std::unique_ptr<BatteryObject> CreateBattery( | |
| 476 const dbus::ObjectPath& device_path) { | |
| 477 return base::MakeUnique<BatteryObject>( | |
| 478 system_bus_.get(), device_path, | |
| 479 base::Bind(&BatteryStatusNotificationThread::BatteryPropertyChanged, | |
| 480 base::Unretained(this))); | |
| 481 } | |
| 482 | |
| 483 void DeviceAdded(dbus::Signal* signal /* unused */) { | |
| 484 // Re-iterate all devices to see if we need to monitor the added battery | |
| 485 // instead of the currently monitored battery. | |
| 486 FindBatteryDevice(); | |
| 487 } | |
| 488 | |
| 489 void DeviceRemoved(dbus::Signal* signal) { | |
| 490 if (!battery_) | |
| 491 return; | |
| 492 | |
| 493 // UPower specifies that the DeviceRemoved signal has an object-path as | |
| 494 // argument, however IRL that signal was observed with a string argument, | |
| 495 // so cover both cases (argument as string, as object-path and neither of | |
| 496 // these) and call FindBatteryDevice() if either we couldn't get the | |
| 497 // argument or the removed device-path is the battery_. | |
| 498 dbus::MessageReader reader(signal); | |
| 499 dbus::ObjectPath removed_device_path; | |
| 500 switch (reader.GetDataType()) { | |
| 501 case dbus::Message::DataType::STRING: { | |
| 502 std::string removed_device_path_string; | |
| 503 if (reader.PopString(&removed_device_path_string)) | |
| 504 removed_device_path = dbus::ObjectPath(removed_device_path_string); | |
| 505 break; | |
| 506 } | |
| 507 | |
| 508 case dbus::Message::DataType::OBJECT_PATH: | |
| 509 reader.PopObjectPath(&removed_device_path); | |
| 510 break; | |
| 511 | |
| 512 default: | |
| 513 break; | |
| 514 } | |
| 515 | |
| 516 if (!removed_device_path.IsValid() || | |
| 517 battery_->proxy()->object_path() == removed_device_path) | |
| 518 FindBatteryDevice(); | |
| 519 } | |
| 520 | |
| 521 void BatteryPropertyChanged(const std::string& property_name) { | |
| 522 NotifyBatteryStatus(); | |
| 523 } | |
| 524 | |
| 525 void BatteryChanged(dbus::Signal* signal /* unsused */) { | |
| 526 DCHECK(battery_); | |
| 527 battery_->properties()->Invalidate(); | |
| 528 NotifyBatteryStatus(); | |
| 529 } | |
| 530 | |
| 531 void NotifyBatteryStatus() { | |
| 532 DCHECK(OnWatcherThread()); | |
| 533 | |
| 534 if (!system_bus_.get() || !battery_ || notifying_battery_status_) | |
| 535 return; | |
| 536 | |
| 537 // If the system uses a UPower daemon older than version 0.99 | |
| 538 // (see IsDaemonVersionBelow_0_99), then we are notified about changed | |
| 539 // battery_ properties through the 'Changed' signal of the battery_ | |
| 540 // device (see BatteryChanged()). That is implemented to invalidate all | |
| 541 // battery_ properties (so they are re-fetched from the dbus). Getting | |
| 542 // the new property-value triggers a callback to BatteryPropertyChanged(). | |
| 543 // notifying_battery_status_ is set to avoid recursion and computing the | |
| 544 // status too often. | |
| 545 notifying_battery_status_ = true; | |
| 546 callback_.Run(ComputeWebBatteryStatus(battery_->properties())); | |
| 547 notifying_battery_status_ = false; | |
| 548 } | |
| 549 | |
| 550 BatteryStatusService::BatteryUpdateCallback callback_; | |
| 551 scoped_refptr<dbus::Bus> system_bus_; | |
| 552 std::unique_ptr<UPowerObject> upower_; | |
| 553 std::unique_ptr<BatteryObject> battery_; | |
| 554 bool notifying_battery_status_ = false; | |
| 555 | |
| 556 DISALLOW_COPY_AND_ASSIGN(BatteryStatusNotificationThread); | |
| 557 }; | |
| 558 | |
| 559 BatteryStatusManagerLinux::BatteryStatusManagerLinux( | |
| 560 const BatteryStatusService::BatteryUpdateCallback& callback) | |
| 561 : callback_(callback) {} | |
| 562 | |
| 563 BatteryStatusManagerLinux::~BatteryStatusManagerLinux() {} | |
| 564 | |
| 565 bool BatteryStatusManagerLinux::StartListeningBatteryChange() { | |
| 566 if (!StartNotifierThreadIfNecessary()) | |
| 567 return false; | |
| 568 | |
| 569 notifier_thread_->task_runner()->PostTask( | |
| 570 FROM_HERE, base::Bind(&BatteryStatusNotificationThread::StartListening, | |
| 571 base::Unretained(notifier_thread_.get()))); | |
| 572 return true; | |
| 573 } | |
| 574 | |
| 575 void BatteryStatusManagerLinux::StopListeningBatteryChange() { | |
| 576 if (!notifier_thread_) | |
| 577 return; | |
| 578 | |
| 579 notifier_thread_->task_runner()->PostTask( | |
| 580 FROM_HERE, base::Bind(&BatteryStatusNotificationThread::StopListening, | |
| 581 base::Unretained(notifier_thread_.get()))); | |
| 582 } | |
| 583 | |
| 584 bool BatteryStatusManagerLinux::StartNotifierThreadIfNecessary() { | |
| 585 if (notifier_thread_) | |
| 586 return true; | |
| 587 | |
| 588 base::Thread::Options thread_options(base::MessageLoop::TYPE_IO, 0); | |
| 589 auto notifier_thread = | |
| 590 base::MakeUnique<BatteryStatusNotificationThread>(callback_); | |
| 591 if (!notifier_thread->StartWithOptions(thread_options)) { | |
| 592 LOG(ERROR) << "Could not start the " << kBatteryNotifierThreadName | |
| 593 << " thread"; | |
| 594 return false; | |
| 595 } | |
| 596 notifier_thread_ = std::move(notifier_thread); | |
| 597 return true; | |
| 598 } | |
| 599 | |
| 600 base::Thread* BatteryStatusManagerLinux::GetNotifierThreadForTesting() { | |
| 601 return notifier_thread_.get(); | |
| 602 } | |
| 603 | |
| 604 // static | |
| 605 std::unique_ptr<BatteryStatusManagerLinux> | |
| 606 BatteryStatusManagerLinux::CreateForTesting( | |
| 607 const BatteryStatusService::BatteryUpdateCallback& callback, | |
| 608 dbus::Bus* bus) { | |
| 609 auto manager = base::MakeUnique<BatteryStatusManagerLinux>(callback); | |
| 610 if (!manager->StartNotifierThreadIfNecessary()) | |
| 611 return nullptr; | |
| 612 manager->notifier_thread_->SetDBusForTesting(bus); | |
| 613 return manager; | |
| 614 } | |
| 615 | |
| 616 // static | |
| 617 std::unique_ptr<BatteryStatusManager> BatteryStatusManager::Create( | |
| 618 const BatteryStatusService::BatteryUpdateCallback& callback) { | |
| 619 return base::MakeUnique<BatteryStatusManagerLinux>(callback); | |
| 620 } | |
| 621 | |
| 622 } // namespace device | |
| OLD | NEW |
|---|
Chromium Code Reviews
Issue 2818673003:
[DeviceService] Expose battery monitoring solely via the Device Service (Closed)
