chromeos/dbus/power_manager_client.cc

   1 // Copyright (c) 2012 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 "chromeos/dbus/power_manager_client.h"
   6
   7 #include <algorithm>
   8
   9 #include "base/bind.h"
  10 #include "base/command_line.h"
  11 #include "base/format_macros.h"
  12 #include "base/logging.h"
  13 #include "base/memory/scoped_ptr.h"
  14 #include "base/message_loop/message_loop.h"
  15 #include "base/observer_list.h"
  16 #include "base/power_monitor/power_monitor_device_source.h"
  17 #include "base/strings/string_number_conversions.h"
  18 #include "base/strings/string_split.h"
  19 #include "base/strings/stringprintf.h"
  20 #include "base/threading/platform_thread.h"
  21 #include "base/timer/timer.h"
  22 #include "chromeos/chromeos_switches.h"
  23 #include "chromeos/dbus/power_manager/input_event.pb.h"
  24 #include "chromeos/dbus/power_manager/peripheral_battery_status.pb.h"
  25 #include "chromeos/dbus/power_manager/policy.pb.h"
  26 #include "chromeos/dbus/power_manager/power_supply_properties.pb.h"
  27 #include "chromeos/dbus/power_manager/suspend.pb.h"
  28 #include "components/device_event_log/device_event_log.h"
  29 #include "dbus/bus.h"
  30 #include "dbus/message.h"
  31 #include "dbus/object_path.h"
  32 #include "dbus/object_proxy.h"
  33
  34 namespace chromeos {
  35
  36 // Maximum amount of time that the power manager will wait for Chrome to
  37 // say that it's ready for the system to be suspended, in milliseconds.
  38 const int kSuspendDelayTimeoutMs = 5000;
  39
  40 // Human-readable description of Chrome's suspend delay.
  41 const char kSuspendDelayDescription[] = "chrome";
  42
  43 // The PowerManagerClient implementation used in production.
  44 class PowerManagerClientImpl : public PowerManagerClient {
  45  public:
  46   PowerManagerClientImpl()
  47       : origin_thread_id_(base::PlatformThread::CurrentId()),
  48         power_manager_proxy_(NULL),
  49         suspend_delay_id_(-1),
  50         has_suspend_delay_id_(false),
  51         dark_suspend_delay_id_(-1),
  52         has_dark_suspend_delay_id_(false),
  53         pending_suspend_id_(-1),
  54         suspend_is_pending_(false),
  55         suspending_from_dark_resume_(false),
  56         num_pending_suspend_readiness_callbacks_(0),
  57         last_is_projecting_(false),
  58         weak_ptr_factory_(this) {}
  59
  60   ~PowerManagerClientImpl() override {
  61     // Here we should unregister suspend notifications from powerd,
  62     // however:
  63     // - The lifetime of the PowerManagerClientImpl can extend past that of
  64     //   the objectproxy,
  65     // - power_manager can already detect that the client is gone and
  66     //   unregister our suspend delay.
  67   }
  68
  69   // PowerManagerClient overrides:
  70
  71   void AddObserver(Observer* observer) override {
  72     CHECK(observer);  // http://crbug.com/119976
  73     observers_.AddObserver(observer);
  74   }
  75
  76   void RemoveObserver(Observer* observer) override {
  77     observers_.RemoveObserver(observer);
  78   }
  79
  80   bool HasObserver(const Observer* observer) const override {
  81     return observers_.HasObserver(observer);
  82   }
  83
  84   void SetRenderProcessManagerDelegate(
  85       base::WeakPtr<RenderProcessManagerDelegate> delegate) override {
  86     DCHECK(!render_process_manager_delegate_)
  87         << "There can be only one! ...RenderProcessManagerDelegate";
  88     render_process_manager_delegate_ = delegate;
  89   }
  90
  91   void DecreaseScreenBrightness(bool allow_off) override {
  92     dbus::MethodCall method_call(
  93         power_manager::kPowerManagerInterface,
  94         power_manager::kDecreaseScreenBrightnessMethod);
  95     dbus::MessageWriter writer(&method_call);
  96     writer.AppendBool(allow_off);
  97     power_manager_proxy_->CallMethod(
  98         &method_call,
  99         dbus::ObjectProxy::TIMEOUT_USE_DEFAULT,
 100         dbus::ObjectProxy::EmptyResponseCallback());
 101   }
 102
 103   void IncreaseScreenBrightness() override {
 104     SimpleMethodCallToPowerManager(
 105         power_manager::kIncreaseScreenBrightnessMethod);
 106   }
 107
 108   void DecreaseKeyboardBrightness() override {
 109     SimpleMethodCallToPowerManager(
 110         power_manager::kDecreaseKeyboardBrightnessMethod);
 111   }
 112
 113   void IncreaseKeyboardBrightness() override {
 114     SimpleMethodCallToPowerManager(
 115         power_manager::kIncreaseKeyboardBrightnessMethod);
 116   }
 117
 118   void SetScreenBrightnessPercent(double percent, bool gradual) override {
 119     dbus::MethodCall method_call(
 120         power_manager::kPowerManagerInterface,
 121         power_manager::kSetScreenBrightnessPercentMethod);
 122     dbus::MessageWriter writer(&method_call);
 123     writer.AppendDouble(percent);
 124     writer.AppendInt32(
 125         gradual ?
 126         power_manager::kBrightnessTransitionGradual :
 127         power_manager::kBrightnessTransitionInstant);
 128     power_manager_proxy_->CallMethod(
 129         &method_call,
 130         dbus::ObjectProxy::TIMEOUT_USE_DEFAULT,
 131         dbus::ObjectProxy::EmptyResponseCallback());
 132   }
 133
 134   void GetScreenBrightnessPercent(
 135       const GetScreenBrightnessPercentCallback& callback) override {
 136     dbus::MethodCall method_call(
 137         power_manager::kPowerManagerInterface,
 138         power_manager::kGetScreenBrightnessPercentMethod);
 139     power_manager_proxy_->CallMethod(
 140         &method_call,
 141         dbus::ObjectProxy::TIMEOUT_USE_DEFAULT,
 142         base::Bind(&PowerManagerClientImpl::OnGetScreenBrightnessPercent,
 143                    weak_ptr_factory_.GetWeakPtr(), callback));
 144   }
 145
 146   void RequestStatusUpdate() override {
 147     POWER_LOG(USER) << "RequestStatusUpdate";
 148     dbus::MethodCall method_call(
 149         power_manager::kPowerManagerInterface,
 150         power_manager::kGetPowerSupplyPropertiesMethod);
 151     power_manager_proxy_->CallMethod(
 152         &method_call,
 153         dbus::ObjectProxy::TIMEOUT_USE_DEFAULT,
 154         base::Bind(&PowerManagerClientImpl::OnGetPowerSupplyPropertiesMethod,
 155                    weak_ptr_factory_.GetWeakPtr()));
 156   }
 157
 158   void RequestSuspend() override {
 159     POWER_LOG(USER) << "RequestSuspend";
 160     SimpleMethodCallToPowerManager(power_manager::kRequestSuspendMethod);
 161   }
 162
 163   void RequestRestart() override {
 164     POWER_LOG(USER) << "RequestRestart";
 165     SimpleMethodCallToPowerManager(power_manager::kRequestRestartMethod);
 166   }
 167
 168   void RequestShutdown() override {
 169     POWER_LOG(USER) << "RequestShutdown";
 170     SimpleMethodCallToPowerManager(power_manager::kRequestShutdownMethod);
 171   }
 172
 173   void NotifyUserActivity(power_manager::UserActivityType type) override {
 174     dbus::MethodCall method_call(
 175         power_manager::kPowerManagerInterface,
 176         power_manager::kHandleUserActivityMethod);
 177     dbus::MessageWriter writer(&method_call);
 178     writer.AppendInt32(type);
 179
 180     power_manager_proxy_->CallMethod(
 181         &method_call,
 182         dbus::ObjectProxy::TIMEOUT_USE_DEFAULT,
 183         dbus::ObjectProxy::EmptyResponseCallback());
 184   }
 185
 186   void NotifyVideoActivity(bool is_fullscreen) override {
 187     dbus::MethodCall method_call(
 188         power_manager::kPowerManagerInterface,
 189         power_manager::kHandleVideoActivityMethod);
 190     dbus::MessageWriter writer(&method_call);
 191     writer.AppendBool(is_fullscreen);
 192
 193     power_manager_proxy_->CallMethod(
 194         &method_call,
 195         dbus::ObjectProxy::TIMEOUT_USE_DEFAULT,
 196         dbus::ObjectProxy::EmptyResponseCallback());
 197   }
 198
 199   void SetPolicy(const power_manager::PowerManagementPolicy& policy) override {
 200     POWER_LOG(USER) << "SetPolicy";
 201     dbus::MethodCall method_call(
 202         power_manager::kPowerManagerInterface,
 203         power_manager::kSetPolicyMethod);
 204     dbus::MessageWriter writer(&method_call);
 205     if (!writer.AppendProtoAsArrayOfBytes(policy)) {
 206       POWER_LOG(ERROR) << "Error calling " << power_manager::kSetPolicyMethod;
 207       return;
 208     }
 209     power_manager_proxy_->CallMethod(
 210         &method_call,
 211         dbus::ObjectProxy::TIMEOUT_USE_DEFAULT,
 212         dbus::ObjectProxy::EmptyResponseCallback());
 213   }
 214
 215   void SetIsProjecting(bool is_projecting) override {
 216     POWER_LOG(USER) << "SetIsProjecting";
 217     dbus::MethodCall method_call(
 218         power_manager::kPowerManagerInterface,
 219         power_manager::kSetIsProjectingMethod);
 220     dbus::MessageWriter writer(&method_call);
 221     writer.AppendBool(is_projecting);
 222     power_manager_proxy_->CallMethod(
 223         &method_call,
 224         dbus::ObjectProxy::TIMEOUT_USE_DEFAULT,
 225         dbus::ObjectProxy::EmptyResponseCallback());
 226     last_is_projecting_ = is_projecting;
 227   }
 228
 229   base::Closure GetSuspendReadinessCallback() override {
 230     DCHECK(OnOriginThread());
 231     DCHECK(suspend_is_pending_);
 232     num_pending_suspend_readiness_callbacks_++;
 233     return base::Bind(&PowerManagerClientImpl::HandleObserverSuspendReadiness,
 234                       weak_ptr_factory_.GetWeakPtr(), pending_suspend_id_,
 235                       suspending_from_dark_resume_);
 236   }
 237
 238   int GetNumPendingSuspendReadinessCallbacks() override {
 239     return num_pending_suspend_readiness_callbacks_;
 240   }
 241
 242  protected:
 243   void Init(dbus::Bus* bus) override {
 244     power_manager_proxy_ = bus->GetObjectProxy(
 245         power_manager::kPowerManagerServiceName,
 246         dbus::ObjectPath(power_manager::kPowerManagerServicePath));
 247
 248     power_manager_proxy_->SetNameOwnerChangedCallback(
 249         base::Bind(&PowerManagerClientImpl::NameOwnerChangedReceived,
 250                    weak_ptr_factory_.GetWeakPtr()));
 251
 252     // Monitor the D-Bus signal for brightness changes. Only the power
 253     // manager knows the actual brightness level. We don't cache the
 254     // brightness level in Chrome as it'll make things less reliable.
 255     power_manager_proxy_->ConnectToSignal(
 256         power_manager::kPowerManagerInterface,
 257         power_manager::kBrightnessChangedSignal,
 258         base::Bind(&PowerManagerClientImpl::BrightnessChangedReceived,
 259                    weak_ptr_factory_.GetWeakPtr()),
 260         base::Bind(&PowerManagerClientImpl::SignalConnected,
 261                    weak_ptr_factory_.GetWeakPtr()));
 262
 263     power_manager_proxy_->ConnectToSignal(
 264         power_manager::kPowerManagerInterface,
 265         power_manager::kPeripheralBatteryStatusSignal,
 266         base::Bind(&PowerManagerClientImpl::PeripheralBatteryStatusReceived,
 267                    weak_ptr_factory_.GetWeakPtr()),
 268         base::Bind(&PowerManagerClientImpl::SignalConnected,
 269                    weak_ptr_factory_.GetWeakPtr()));
 270
 271     power_manager_proxy_->ConnectToSignal(
 272         power_manager::kPowerManagerInterface,
 273         power_manager::kPowerSupplyPollSignal,
 274         base::Bind(&PowerManagerClientImpl::PowerSupplyPollReceived,
 275                    weak_ptr_factory_.GetWeakPtr()),
 276         base::Bind(&PowerManagerClientImpl::SignalConnected,
 277                    weak_ptr_factory_.GetWeakPtr()));
 278
 279     power_manager_proxy_->ConnectToSignal(
 280         power_manager::kPowerManagerInterface,
 281         power_manager::kInputEventSignal,
 282         base::Bind(&PowerManagerClientImpl::InputEventReceived,
 283                    weak_ptr_factory_.GetWeakPtr()),
 284         base::Bind(&PowerManagerClientImpl::SignalConnected,
 285                    weak_ptr_factory_.GetWeakPtr()));
 286
 287     power_manager_proxy_->ConnectToSignal(
 288         power_manager::kPowerManagerInterface,
 289         power_manager::kSuspendImminentSignal,
 290         base::Bind(
 291             &PowerManagerClientImpl::HandleSuspendImminent,
 292             weak_ptr_factory_.GetWeakPtr(), false),
 293         base::Bind(&PowerManagerClientImpl::SignalConnected,
 294                    weak_ptr_factory_.GetWeakPtr()));
 295
 296     power_manager_proxy_->ConnectToSignal(
 297         power_manager::kPowerManagerInterface,
 298         power_manager::kSuspendDoneSignal,
 299         base::Bind(&PowerManagerClientImpl::SuspendDoneReceived,
 300                    weak_ptr_factory_.GetWeakPtr()),
 301         base::Bind(&PowerManagerClientImpl::SignalConnected,
 302                    weak_ptr_factory_.GetWeakPtr()));
 303
 304     power_manager_proxy_->ConnectToSignal(
 305         power_manager::kPowerManagerInterface,
 306         power_manager::kDarkSuspendImminentSignal,
 307         base::Bind(
 308             &PowerManagerClientImpl::HandleSuspendImminent,
 309             weak_ptr_factory_.GetWeakPtr(), true),
 310         base::Bind(&PowerManagerClientImpl::SignalConnected,
 311                    weak_ptr_factory_.GetWeakPtr()));
 312
 313     power_manager_proxy_->ConnectToSignal(
 314         power_manager::kPowerManagerInterface,
 315         power_manager::kIdleActionImminentSignal,
 316         base::Bind(
 317             &PowerManagerClientImpl::IdleActionImminentReceived,
 318             weak_ptr_factory_.GetWeakPtr()),
 319         base::Bind(&PowerManagerClientImpl::SignalConnected,
 320                    weak_ptr_factory_.GetWeakPtr()));
 321
 322     power_manager_proxy_->ConnectToSignal(
 323         power_manager::kPowerManagerInterface,
 324         power_manager::kIdleActionDeferredSignal,
 325         base::Bind(
 326             &PowerManagerClientImpl::IdleActionDeferredReceived,
 327             weak_ptr_factory_.GetWeakPtr()),
 328         base::Bind(&PowerManagerClientImpl::SignalConnected,
 329                    weak_ptr_factory_.GetWeakPtr()));
 330
 331     RegisterSuspendDelays();
 332   }
 333
 334  private:
 335   // Returns true if the current thread is the origin thread.
 336   bool OnOriginThread() {
 337     return base::PlatformThread::CurrentId() == origin_thread_id_;
 338   }
 339
 340   // Called when a dbus signal is initially connected.
 341   void SignalConnected(const std::string& interface_name,
 342                        const std::string& signal_name,
 343                        bool success) {
 344     if (!success)
 345       POWER_LOG(ERROR) << "Failed to connect to signal " << signal_name << ".";
 346   }
 347
 348   // Makes a method call to power manager with no arguments and no response.
 349   void SimpleMethodCallToPowerManager(const std::string& method_name) {
 350     dbus::MethodCall method_call(power_manager::kPowerManagerInterface,
 351                                  method_name);
 352     power_manager_proxy_->CallMethod(
 353         &method_call,
 354         dbus::ObjectProxy::TIMEOUT_USE_DEFAULT,
 355         dbus::ObjectProxy::EmptyResponseCallback());
 356   }
 357
 358   void NameOwnerChangedReceived(const std::string& old_owner,
 359                                 const std::string& new_owner) {
 360     POWER_LOG(EVENT) << "Power manager restarted. Old owner: "
 361                      << (old_owner.empty() ? "[none]" : old_owner.c_str())
 362                      << " New owner: "
 363                      << (new_owner.empty() ? "[none]" : new_owner.c_str());
 364     suspend_is_pending_ = false;
 365     pending_suspend_id_ = -1;
 366     suspending_from_dark_resume_ = false;
 367     if (!new_owner.empty()) {
 368       POWER_LOG(EVENT) << "Sending initial state to power manager";
 369       RegisterSuspendDelays();
 370       SetIsProjecting(last_is_projecting_);
 371       FOR_EACH_OBSERVER(Observer, observers_, PowerManagerRestarted());
 372     }
 373   }
 374
 375   void BrightnessChangedReceived(dbus::Signal* signal) {
 376     dbus::MessageReader reader(signal);
 377     int32_t brightness_level = 0;
 378     bool user_initiated = 0;
 379     if (!(reader.PopInt32(&brightness_level) &&
 380           reader.PopBool(&user_initiated))) {
 381       POWER_LOG(ERROR) << "Brightness changed signal had incorrect parameters: "
 382                        << signal->ToString();
 383       return;
 384     }
 385     POWER_LOG(DEBUG) << "Brightness changed to " << brightness_level
 386                      << ": user initiated " << user_initiated;
 387     FOR_EACH_OBSERVER(Observer, observers_,
 388                       BrightnessChanged(brightness_level, user_initiated));
 389   }
 390
 391   void PeripheralBatteryStatusReceived(dbus::Signal* signal) {
 392     dbus::MessageReader reader(signal);
 393     power_manager::PeripheralBatteryStatus protobuf_status;
 394     if (!reader.PopArrayOfBytesAsProto(&protobuf_status)) {
 395       POWER_LOG(ERROR) << "Unable to decode protocol buffer from "
 396                        << power_manager::kPeripheralBatteryStatusSignal
 397                        << " signal";
 398       return;
 399     }
 400
 401     std::string path = protobuf_status.path();
 402     std::string name = protobuf_status.name();
 403     int level = protobuf_status.has_level() ? protobuf_status.level() : -1;
 404
 405     POWER_LOG(DEBUG) << "Device battery status received " << level << " for "
 406                      << name << " at " << path;
 407
 408     FOR_EACH_OBSERVER(Observer, observers_,
 409                       PeripheralBatteryStatusReceived(path, name, level));
 410   }
 411
 412   void PowerSupplyPollReceived(dbus::Signal* signal) {
 413     POWER_LOG(DEBUG) << "Received power supply poll signal.";
 414     dbus::MessageReader reader(signal);
 415     power_manager::PowerSupplyProperties protobuf;
 416     if (reader.PopArrayOfBytesAsProto(&protobuf)) {
 417       HandlePowerSupplyProperties(protobuf);
 418     } else {
 419       POWER_LOG(ERROR) << "Unable to decode "
 420                        << power_manager::kPowerSupplyPollSignal << " signal";
 421     }
 422   }
 423
 424   void OnGetPowerSupplyPropertiesMethod(dbus::Response* response) {
 425     if (!response) {
 426       POWER_LOG(ERROR) << "Error calling "
 427                        << power_manager::kGetPowerSupplyPropertiesMethod;
 428       return;
 429     }
 430
 431     dbus::MessageReader reader(response);
 432     power_manager::PowerSupplyProperties protobuf;
 433     if (reader.PopArrayOfBytesAsProto(&protobuf)) {
 434       HandlePowerSupplyProperties(protobuf);
 435     } else {
 436       POWER_LOG(ERROR) << "Unable to decode "
 437                        << power_manager::kGetPowerSupplyPropertiesMethod
 438                        << " response";
 439     }
 440   }
 441
 442   void OnGetScreenBrightnessPercent(
 443       const GetScreenBrightnessPercentCallback& callback,
 444       dbus::Response* response) {
 445     if (!response) {
 446       POWER_LOG(ERROR) << "Error calling "
 447                        << power_manager::kGetScreenBrightnessPercentMethod;
 448       return;
 449     }
 450     dbus::MessageReader reader(response);
 451     double percent = 0.0;
 452     if (!reader.PopDouble(&percent))
 453       POWER_LOG(ERROR) << "Error reading response from powerd: "
 454                        << response->ToString();
 455     callback.Run(percent);
 456   }
 457
 458   void HandlePowerSupplyProperties(
 459       const power_manager::PowerSupplyProperties& proto) {
 460     FOR_EACH_OBSERVER(Observer, observers_, PowerChanged(proto));
 461     const bool on_battery = proto.external_power() ==
 462         power_manager::PowerSupplyProperties_ExternalPower_DISCONNECTED;
 463     base::PowerMonitorDeviceSource::SetPowerSource(on_battery);
 464   }
 465
 466   void HandleRegisterSuspendDelayReply(bool dark_suspend,
 467                                        const std::string& method_name,
 468                                        dbus::Response* response) {
 469     if (!response) {
 470       POWER_LOG(ERROR) << "Error calling " << method_name;
 471       return;
 472     }
 473
 474     dbus::MessageReader reader(response);
 475     power_manager::RegisterSuspendDelayReply protobuf;
 476     if (!reader.PopArrayOfBytesAsProto(&protobuf)) {
 477       POWER_LOG(ERROR) << "Unable to parse reply from " << method_name;
 478       return;
 479     }
 480
 481     if (dark_suspend) {
 482       dark_suspend_delay_id_ = protobuf.delay_id();
 483       has_dark_suspend_delay_id_ = true;
 484       POWER_LOG(EVENT) << "Registered dark suspend delay "
 485                        << dark_suspend_delay_id_;
 486     } else {
 487       suspend_delay_id_ = protobuf.delay_id();
 488       has_suspend_delay_id_ = true;
 489       POWER_LOG(EVENT) << "Registered suspend delay " << suspend_delay_id_;
 490     }
 491   }
 492
 493   void HandleSuspendImminent(bool in_dark_resume, dbus::Signal* signal) {
 494     std::string signal_name = signal->GetMember();
 495     if ((in_dark_resume && !has_dark_suspend_delay_id_) ||
 496         (!in_dark_resume && !has_suspend_delay_id_)) {
 497       POWER_LOG(ERROR) << "Received unrequested " << signal_name << " signal";
 498       return;
 499     }
 500
 501     dbus::MessageReader reader(signal);
 502     power_manager::SuspendImminent proto;
 503     if (!reader.PopArrayOfBytesAsProto(&proto)) {
 504       POWER_LOG(ERROR) << "Unable to decode protocol buffer from "
 505                        << signal_name << " signal";
 506       return;
 507     }
 508
 509     POWER_LOG(EVENT) << "Got " << signal_name
 510                      << " signal announcing suspend attempt "
 511                      << proto.suspend_id();
 512
 513     // If a previous suspend is pending from the same state we are currently in
 514     // (fully powered on or in dark resume), then something's gone a little
 515     // wonky.
 516     if (suspend_is_pending_ && suspending_from_dark_resume_ == in_dark_resume) {
 517       POWER_LOG(ERROR) << "Got " << signal_name
 518                        << " signal about pending suspend attempt "
 519                        << proto.suspend_id()
 520                        << " while still waiting on attempt "
 521                        << pending_suspend_id_;
 522     }
 523
 524     pending_suspend_id_ = proto.suspend_id();
 525     suspend_is_pending_ = true;
 526     suspending_from_dark_resume_ = in_dark_resume;
 527     num_pending_suspend_readiness_callbacks_ = 0;
 528     if (suspending_from_dark_resume_)
 529       FOR_EACH_OBSERVER(Observer, observers_, DarkSuspendImminent());
 530     else
 531       FOR_EACH_OBSERVER(Observer, observers_, SuspendImminent());
 532     base::PowerMonitorDeviceSource::HandleSystemSuspending();
 533     MaybeReportSuspendReadiness();
 534   }
 535
 536   void SuspendDoneReceived(dbus::Signal* signal) {
 537     dbus::MessageReader reader(signal);
 538     power_manager::SuspendDone proto;
 539     if (!reader.PopArrayOfBytesAsProto(&proto)) {
 540       POWER_LOG(ERROR) << "Unable to decode protocol buffer from "
 541                        << power_manager::kSuspendDoneSignal << " signal";
 542       return;
 543     }
 544
 545     const base::TimeDelta duration =
 546         base::TimeDelta::FromInternalValue(proto.suspend_duration());
 547     POWER_LOG(EVENT) << "Got " << power_manager::kSuspendDoneSignal
 548                      << " signal:"
 549                      << " suspend_id=" << proto.suspend_id()
 550                      << " duration=" << duration.InSeconds() << " sec";
 551
 552     if (render_process_manager_delegate_)
 553       render_process_manager_delegate_->SuspendDone();
 554
 555     FOR_EACH_OBSERVER(
 556         PowerManagerClient::Observer, observers_, SuspendDone(duration));
 557     base::PowerMonitorDeviceSource::HandleSystemResumed();
 558   }
 559
 560   void IdleActionImminentReceived(dbus::Signal* signal) {
 561     dbus::MessageReader reader(signal);
 562     power_manager::IdleActionImminent proto;
 563     if (!reader.PopArrayOfBytesAsProto(&proto)) {
 564       POWER_LOG(ERROR) << "Unable to decode protocol buffer from "
 565                        << power_manager::kIdleActionImminentSignal << " signal";
 566       return;
 567     }
 568     FOR_EACH_OBSERVER(Observer, observers_,
 569         IdleActionImminent(base::TimeDelta::FromInternalValue(
 570             proto.time_until_idle_action())));
 571   }
 572
 573   void IdleActionDeferredReceived(dbus::Signal* signal) {
 574     FOR_EACH_OBSERVER(Observer, observers_, IdleActionDeferred());
 575   }
 576
 577   void InputEventReceived(dbus::Signal* signal) {
 578     dbus::MessageReader reader(signal);
 579     power_manager::InputEvent proto;
 580     if (!reader.PopArrayOfBytesAsProto(&proto)) {
 581       POWER_LOG(ERROR) << "Unable to decode protocol buffer from "
 582                        << power_manager::kInputEventSignal << " signal";
 583       return;
 584     }
 585
 586     base::TimeTicks timestamp =
 587         base::TimeTicks::FromInternalValue(proto.timestamp());
 588     POWER_LOG(USER) << "Got " << power_manager::kInputEventSignal << " signal:"
 589                     << " type=" << proto.type()
 590                     << " timestamp=" << proto.timestamp();
 591     switch (proto.type()) {
 592       case power_manager::InputEvent_Type_POWER_BUTTON_DOWN:
 593       case power_manager::InputEvent_Type_POWER_BUTTON_UP: {
 594         const bool down =
 595             (proto.type() == power_manager::InputEvent_Type_POWER_BUTTON_DOWN);
 596         FOR_EACH_OBSERVER(PowerManagerClient::Observer, observers_,
 597                           PowerButtonEventReceived(down, timestamp));
 598
 599         // Tell powerd that Chrome has handled power button presses.
 600         if (down) {
 601           dbus::MethodCall method_call(
 602               power_manager::kPowerManagerInterface,
 603               power_manager::kHandlePowerButtonAcknowledgmentMethod);
 604           dbus::MessageWriter writer(&method_call);
 605           writer.AppendInt64(proto.timestamp());
 606           power_manager_proxy_->CallMethod(
 607               &method_call,
 608               dbus::ObjectProxy::TIMEOUT_USE_DEFAULT,
 609               dbus::ObjectProxy::EmptyResponseCallback());
 610         }
 611         break;
 612       }
 613       case power_manager::InputEvent_Type_LID_OPEN:
 614       case power_manager::InputEvent_Type_LID_CLOSED: {
 615         bool open =
 616             (proto.type() == power_manager::InputEvent_Type_LID_OPEN);
 617         FOR_EACH_OBSERVER(PowerManagerClient::Observer, observers_,
 618                           LidEventReceived(open, timestamp));
 619         break;
 620       }
 621     }
 622   }
 623
 624   void RegisterSuspendDelayImpl(
 625       const std::string& method_name,
 626       const power_manager::RegisterSuspendDelayRequest& protobuf_request,
 627       dbus::ObjectProxy::ResponseCallback callback) {
 628     dbus::MethodCall method_call(
 629         power_manager::kPowerManagerInterface, method_name);
 630     dbus::MessageWriter writer(&method_call);
 631
 632     if (!writer.AppendProtoAsArrayOfBytes(protobuf_request)) {
 633       POWER_LOG(ERROR) << "Error constructing message for " << method_name;
 634       return;
 635     }
 636
 637     power_manager_proxy_->CallMethod(
 638         &method_call, dbus::ObjectProxy::TIMEOUT_USE_DEFAULT, callback);
 639   }
 640
 641   // Registers suspend delays with the power manager.  This is usually only
 642   // called at startup, but if the power manager restarts, we need to create new
 643   // delays.
 644   void RegisterSuspendDelays() {
 645     // Throw out any old delay that was registered.
 646     suspend_delay_id_ = -1;
 647     has_suspend_delay_id_ = false;
 648     dark_suspend_delay_id_ = -1;
 649     has_dark_suspend_delay_id_ = false;
 650
 651     power_manager::RegisterSuspendDelayRequest protobuf_request;
 652     base::TimeDelta timeout =
 653         base::TimeDelta::FromMilliseconds(kSuspendDelayTimeoutMs);
 654     protobuf_request.set_timeout(timeout.ToInternalValue());
 655     protobuf_request.set_description(kSuspendDelayDescription);
 656
 657     RegisterSuspendDelayImpl(
 658         power_manager::kRegisterSuspendDelayMethod,
 659         protobuf_request,
 660         base::Bind(&PowerManagerClientImpl::HandleRegisterSuspendDelayReply,
 661                    weak_ptr_factory_.GetWeakPtr(), false,
 662                    power_manager::kRegisterSuspendDelayMethod));
 663     RegisterSuspendDelayImpl(
 664         power_manager::kRegisterDarkSuspendDelayMethod,
 665         protobuf_request,
 666         base::Bind(&PowerManagerClientImpl::HandleRegisterSuspendDelayReply,
 667                    weak_ptr_factory_.GetWeakPtr(), true,
 668                    power_manager::kRegisterDarkSuspendDelayMethod));
 669   }
 670
 671   // Records the fact that an observer has finished doing asynchronous work
 672   // that was blocking a pending suspend attempt and possibly reports
 673   // suspend readiness to powerd.  Called by callbacks returned via
 674   // GetSuspendReadinessCallback().
 675   void HandleObserverSuspendReadiness(int32_t suspend_id, bool in_dark_resume) {
 676     DCHECK(OnOriginThread());
 677     if (!suspend_is_pending_ || suspend_id != pending_suspend_id_ ||
 678         in_dark_resume != suspending_from_dark_resume_)
 679       return;
 680
 681     num_pending_suspend_readiness_callbacks_--;
 682     MaybeReportSuspendReadiness();
 683   }
 684
 685   // Reports suspend readiness to powerd if no observers are still holding
 686   // suspend readiness callbacks.
 687   void MaybeReportSuspendReadiness() {
 688     if (!suspend_is_pending_ || num_pending_suspend_readiness_callbacks_ > 0)
 689       return;
 690
 691     std::string method_name;
 692     int32_t delay_id = -1;
 693     if (suspending_from_dark_resume_) {
 694       method_name = power_manager::kHandleDarkSuspendReadinessMethod;
 695       delay_id = dark_suspend_delay_id_;
 696     } else {
 697       method_name = power_manager::kHandleSuspendReadinessMethod;
 698       delay_id = suspend_delay_id_;
 699     }
 700
 701     if (render_process_manager_delegate_ && !suspending_from_dark_resume_)
 702       render_process_manager_delegate_->SuspendImminent();
 703
 704     dbus::MethodCall method_call(
 705         power_manager::kPowerManagerInterface, method_name);
 706     dbus::MessageWriter writer(&method_call);
 707
 708     POWER_LOG(EVENT) << "Announcing readiness of suspend delay " << delay_id
 709                      << " for suspend attempt " << pending_suspend_id_;
 710     power_manager::SuspendReadinessInfo protobuf_request;
 711     protobuf_request.set_delay_id(delay_id);
 712     protobuf_request.set_suspend_id(pending_suspend_id_);
 713
 714     pending_suspend_id_ = -1;
 715     suspend_is_pending_ = false;
 716
 717     if (!writer.AppendProtoAsArrayOfBytes(protobuf_request)) {
 718       POWER_LOG(ERROR) << "Error constructing message for " << method_name;
 719       return;
 720     }
 721     power_manager_proxy_->CallMethod(
 722         &method_call,
 723         dbus::ObjectProxy::TIMEOUT_USE_DEFAULT,
 724         dbus::ObjectProxy::EmptyResponseCallback());
 725   }
 726
 727   // Origin thread (i.e. the UI thread in production).
 728   base::PlatformThreadId origin_thread_id_;
 729
 730   dbus::ObjectProxy* power_manager_proxy_;
 731   base::ObserverList<Observer> observers_;
 732
 733   // The delay_id_ obtained from the RegisterSuspendDelay request.
 734   int32_t suspend_delay_id_;
 735   bool has_suspend_delay_id_;
 736
 737   // The delay_id_ obtained from the RegisterDarkSuspendDelay request.
 738   int32_t dark_suspend_delay_id_;
 739   bool has_dark_suspend_delay_id_;
 740
 741   // powerd-supplied ID corresponding to an imminent suspend attempt that is
 742   // currently being delayed.
 743   int32_t pending_suspend_id_;
 744   bool suspend_is_pending_;
 745
 746   // Set to true when the suspend currently being delayed was triggered during a
 747   // dark resume.  Since |pending_suspend_id_| and |suspend_is_pending_| are
 748   // both shared by normal and dark suspends, |suspending_from_dark_resume_|
 749   // helps distinguish the context within which these variables are being used.
 750   bool suspending_from_dark_resume_;
 751
 752   // Number of callbacks that have been returned by
 753   // GetSuspendReadinessCallback() during the currently-pending suspend
 754   // attempt but have not yet been called.
 755   int num_pending_suspend_readiness_callbacks_;
 756
 757   // Last state passed to SetIsProjecting().
 758   bool last_is_projecting_;
 759
 760   // The delegate used to manage the power consumption of Chrome's renderer
 761   // processes.
 762   base::WeakPtr<RenderProcessManagerDelegate> render_process_manager_delegate_;
 763
 764   // Note: This should remain the last member so it'll be destroyed and
 765   // invalidate its weak pointers before any other members are destroyed.
 766   base::WeakPtrFactory<PowerManagerClientImpl> weak_ptr_factory_;
 767
 768   DISALLOW_COPY_AND_ASSIGN(PowerManagerClientImpl);
 769 };
 770
 771 // The PowerManagerClient implementation used on Linux desktop,
 772 // which does nothing.
 773 class PowerManagerClientStubImpl : public PowerManagerClient {
 774  public:
 775   PowerManagerClientStubImpl()
 776       : discharging_(true),
 777         battery_percentage_(40),
 778         brightness_(50.0),
 779         pause_count_(2),
 780         cycle_count_(0),
 781         num_pending_suspend_readiness_callbacks_(0),
 782         weak_ptr_factory_(this) {}
 783
 784   ~PowerManagerClientStubImpl() override {}
 785
 786   int num_pending_suspend_readiness_callbacks() const {
 787     return num_pending_suspend_readiness_callbacks_;
 788   }
 789
 790   // PowerManagerClient overrides:
 791   void Init(dbus::Bus* bus) override {
 792     ParseCommandLineSwitch();
 793     if (power_cycle_delay_ != base::TimeDelta()) {
 794       update_timer_.Start(FROM_HERE,
 795                           power_cycle_delay_,
 796                           this,
 797                           &PowerManagerClientStubImpl::UpdateStatus);
 798     }
 799   }
 800
 801   void AddObserver(Observer* observer) override {
 802     observers_.AddObserver(observer);
 803   }
 804
 805   void RemoveObserver(Observer* observer) override {
 806     observers_.RemoveObserver(observer);
 807   }
 808
 809   bool HasObserver(const Observer* observer) const override {
 810     return observers_.HasObserver(observer);
 811   }
 812
 813   void SetRenderProcessManagerDelegate(
 814       base::WeakPtr<RenderProcessManagerDelegate> delegate) override {}
 815
 816   void DecreaseScreenBrightness(bool allow_off) override {
 817     POWER_LOG(USER) << "Requested to descrease screen brightness";
 818     SetBrightness(brightness_ - 5.0, true);
 819   }
 820
 821   void IncreaseScreenBrightness() override {
 822     POWER_LOG(USER) << "Requested to increase screen brightness";
 823     SetBrightness(brightness_ + 5.0, true);
 824   }
 825
 826   void SetScreenBrightnessPercent(double percent, bool gradual) override {
 827     POWER_LOG(USER) << "Requested to set screen brightness to " << percent
 828                     << "% " << (gradual ? "gradually" : "instantaneously");
 829     SetBrightness(percent, false);
 830   }
 831
 832   void GetScreenBrightnessPercent(
 833       const GetScreenBrightnessPercentCallback& callback) override {
 834     POWER_LOG(USER) << "Requested to get screen brightness";
 835     callback.Run(brightness_);
 836   }
 837
 838   void DecreaseKeyboardBrightness() override {
 839     POWER_LOG(USER) << "Requested to descrease keyboard brightness";
 840   }
 841
 842   void IncreaseKeyboardBrightness() override {
 843     POWER_LOG(USER) << "Requested to increase keyboard brightness";
 844   }
 845
 846   void RequestStatusUpdate() override {
 847     POWER_LOG(USER) << "Requested status update";
 848     base::MessageLoop::current()->PostTask(
 849         FROM_HERE, base::Bind(&PowerManagerClientStubImpl::UpdateStatus,
 850                               weak_ptr_factory_.GetWeakPtr()));
 851   }
 852
 853   void RequestSuspend() override {}
 854   void RequestRestart() override {}
 855   void RequestShutdown() override {}
 856
 857   void NotifyUserActivity(power_manager::UserActivityType type) override {}
 858   void NotifyVideoActivity(bool is_fullscreen) override {}
 859   void SetPolicy(const power_manager::PowerManagementPolicy& policy) override {}
 860   void SetIsProjecting(bool is_projecting) override {}
 861   base::Closure GetSuspendReadinessCallback() override {
 862     num_pending_suspend_readiness_callbacks_++;
 863     return base::Bind(&PowerManagerClientStubImpl::HandleSuspendReadiness,
 864                       weak_ptr_factory_.GetWeakPtr());
 865   }
 866   int GetNumPendingSuspendReadinessCallbacks() override {
 867     return num_pending_suspend_readiness_callbacks_;
 868   }
 869
 870  private:
 871   void HandleSuspendReadiness() {
 872     num_pending_suspend_readiness_callbacks_--;
 873   }
 874
 875   void UpdateStatus() {
 876     if (pause_count_ > 0) {
 877       pause_count_--;
 878       if (pause_count_ == 2)
 879         discharging_ = !discharging_;
 880     } else {
 881       if (discharging_)
 882         battery_percentage_ -= (battery_percentage_ <= 10 ? 1 : 10);
 883       else
 884         battery_percentage_ += (battery_percentage_ >= 10 ? 10 : 1);
 885       battery_percentage_ = std::min(std::max(battery_percentage_, 0), 100);
 886       // We pause at 0 and 100% so that it's easier to check those conditions.
 887       if (battery_percentage_ == 0 || battery_percentage_ == 100) {
 888         pause_count_ = 4;
 889         if (battery_percentage_ == 100)
 890           cycle_count_ = (cycle_count_ + 1) % 3;
 891       }
 892     }
 893
 894     const int kSecondsToEmptyFullBattery = 3 * 60 * 60;  // 3 hours.
 895     int64 remaining_battery_time =
 896         std::max(1, battery_percentage_ * kSecondsToEmptyFullBattery / 100);
 897
 898     props_.Clear();
 899
 900     switch (cycle_count_) {
 901       case 0:
 902         // Say that the system is charging with AC connected and
 903         // discharging without any charger connected.
 904         props_.set_external_power(discharging_ ?
 905             power_manager::PowerSupplyProperties_ExternalPower_DISCONNECTED :
 906             power_manager::PowerSupplyProperties_ExternalPower_AC);
 907         break;
 908       case 1:
 909         // Say that the system is both charging and discharging on USB
 910         // (i.e. a low-power charger).
 911         props_.set_external_power(
 912             power_manager::PowerSupplyProperties_ExternalPower_USB);
 913         break;
 914       case 2:
 915         // Say that the system is both charging and discharging on AC.
 916         props_.set_external_power(
 917             power_manager::PowerSupplyProperties_ExternalPower_AC);
 918         break;
 919       default:
 920         NOTREACHED() << "Unhandled cycle " << cycle_count_;
 921     }
 922
 923     if (battery_percentage_ == 100 && !discharging_) {
 924       props_.set_battery_state(
 925           power_manager::PowerSupplyProperties_BatteryState_FULL);
 926     } else if (!discharging_) {
 927       props_.set_battery_state(
 928           power_manager::PowerSupplyProperties_BatteryState_CHARGING);
 929       props_.set_battery_time_to_full_sec(std::max(static_cast<int64>(1),
 930           kSecondsToEmptyFullBattery - remaining_battery_time));
 931     } else {
 932       props_.set_battery_state(
 933           power_manager::PowerSupplyProperties_BatteryState_DISCHARGING);
 934       props_.set_battery_time_to_empty_sec(remaining_battery_time);
 935     }
 936
 937     props_.set_battery_percent(battery_percentage_);
 938     props_.set_is_calculating_battery_time(pause_count_ > 1);
 939
 940     FOR_EACH_OBSERVER(Observer, observers_, PowerChanged(props_));
 941   }
 942
 943   void SetBrightness(double percent, bool user_initiated) {
 944     brightness_ = std::min(std::max(0.0, percent), 100.0);
 945     int brightness_level = static_cast<int>(brightness_);
 946     FOR_EACH_OBSERVER(Observer, observers_,
 947                       BrightnessChanged(brightness_level, user_initiated));
 948   }
 949
 950   void ParseCommandLineSwitch() {
 951     base::CommandLine* command_line = base::CommandLine::ForCurrentProcess();
 952     if (!command_line || !command_line->HasSwitch(switches::kPowerStub))
 953       return;
 954     std::string option_str =
 955         command_line->GetSwitchValueASCII(switches::kPowerStub);
 956     base::StringPairs string_pairs;
 957     base::SplitStringIntoKeyValuePairs(option_str, '=', ',', &string_pairs);
 958     for (base::StringPairs::iterator iter = string_pairs.begin();
 959          iter != string_pairs.end(); ++iter) {
 960       ParseOption((*iter).first, (*iter).second);
 961     }
 962   }
 963
 964   void ParseOption(const std::string& arg0, const std::string& arg1) {
 965     if (arg0 == "cycle" || arg0 == "interactive") {
 966       int seconds = 1;
 967       if (!arg1.empty())
 968         base::StringToInt(arg1, &seconds);
 969       power_cycle_delay_ = base::TimeDelta::FromSeconds(seconds);
 970     }
 971   }
 972
 973   base::TimeDelta power_cycle_delay_;  // Time over which to cycle power state
 974   bool discharging_;
 975   int battery_percentage_;
 976   double brightness_;
 977   int pause_count_;
 978   int cycle_count_;
 979   base::ObserverList<Observer> observers_;
 980   base::RepeatingTimer<PowerManagerClientStubImpl> update_timer_;
 981   power_manager::PowerSupplyProperties props_;
 982
 983   // Number of callbacks returned by GetSuspendReadinessCallback() but not yet
 984   // invoked.
 985   int num_pending_suspend_readiness_callbacks_;
 986
 987   // Note: This should remain the last member so it'll be destroyed and
 988   // invalidate its weak pointers before any other members are destroyed.
 989   base::WeakPtrFactory<PowerManagerClientStubImpl> weak_ptr_factory_;
 990 };
 991
 992 PowerManagerClient::PowerManagerClient() {
 993 }
 994
 995 PowerManagerClient::~PowerManagerClient() {
 996 }
 997
 998 // static
 999 PowerManagerClient* PowerManagerClient::Create(
1000     DBusClientImplementationType type) {
1001   if (type == REAL_DBUS_CLIENT_IMPLEMENTATION)
1002     return new PowerManagerClientImpl();
1003   DCHECK_EQ(STUB_DBUS_CLIENT_IMPLEMENTATION, type);
1004   return new PowerManagerClientStubImpl();
1005 }
1006
1007 }  // namespace chromeos