ChromeOs Power Emulation Impl

chromeos/dbus/fake_power_manager_client.cc

 // Copyright (c) 2013 The Chromium Authors. All rights reserved.
 // Use of this source code is governed by a BSD-style license that can be
 // found in the LICENSE file.
 
 #include "chromeos/dbus/fake_power_manager_client.h"
 
 #include "base/bind.h"
 #include "base/bind_helpers.h"
 #include "base/time/time.h"
 
 namespace chromeos {
+namespace {
+
+const int kDefaultBatteryLifeSpanSec = 6 * 3600;  // 6 hours
+
+}  // namespace
 
 FakePowerManagerClient::FakePowerManagerClient()
     : num_request_restart_calls_(0),
       num_request_shutdown_calls_(0),
       num_set_policy_calls_(0),
       num_set_is_projecting_calls_(0),
       num_pending_suspend_readiness_callbacks_(0),
       is_projecting_(false) {
 }
 
 FakePowerManagerClient::~FakePowerManagerClient() {
 }
 
 void FakePowerManagerClient::Init(dbus::Bus* bus) {
+  UpdatePowerProperties(
+      50, false, power_manager::PowerSupplyProperties_BatteryState_DISCHARGING,
+      power_manager::PowerSupplyProperties_ExternalPower_DISCONNECTED);
 }
 
 void FakePowerManagerClient::AddObserver(Observer* observer) {
   observers_.AddObserver(observer);
 }
 
 void FakePowerManagerClient::RemoveObserver(Observer* observer) {
   observers_.RemoveObserver(observer);
 }
 
 bool FakePowerManagerClient::HasObserver(const Observer* observer) const {
-  return false;
+  return observers_.HasObserver(observer);
 }
 
 void FakePowerManagerClient::SetRenderProcessManagerDelegate(
     base::WeakPtr<RenderProcessManagerDelegate> delegate) {
   render_process_manager_delegate_ = delegate;
 }
 
 void FakePowerManagerClient::DecreaseScreenBrightness(bool allow_off) {
 }
 
 void FakePowerManagerClient::IncreaseScreenBrightness() {
 }
 
 void FakePowerManagerClient::SetScreenBrightnessPercent(double percent,
                                                         bool gradual) {
 }
 
 void FakePowerManagerClient::GetScreenBrightnessPercent(
     const GetScreenBrightnessPercentCallback& callback) {
 }
 
 void FakePowerManagerClient::DecreaseKeyboardBrightness() {
 }
 
 void FakePowerManagerClient::IncreaseKeyboardBrightness() {
 }
 
 void FakePowerManagerClient::RequestStatusUpdate() {
+  NotifyObservers();
 }
 
 void FakePowerManagerClient::RequestSuspend() {
 }
 
 void FakePowerManagerClient::RequestRestart() {
   ++num_request_restart_calls_;
 }
 
 void FakePowerManagerClient::RequestShutdown() {
@@ skipping 46 matching lines @@
   FOR_EACH_OBSERVER(Observer, observers_, DarkSuspendImminent());
 }
 
 void FakePowerManagerClient::SendPowerButtonEvent(
     bool down,
     const base::TimeTicks& timestamp) {
   FOR_EACH_OBSERVER(Observer, observers_,
                     PowerButtonEventReceived(down, timestamp));
 }
 
+void FakePowerManagerClient::UpdatePowerProperties(
+    int battery_percent,
+    bool is_calculating_battery_time,
+    power_manager::PowerSupplyProperties::BatteryState battery_state,
+    power_manager::PowerSupplyProperties::ExternalPower external_power) {
+  int remaining_battery_sec =
+      battery_percent * kDefaultBatteryLifeSpanSec / 100;
+
+  // Sets the charging state based on the battery percentage to mimic real
+  // implementation.
+  if (battery_percent == 100 &&
+      (battery_state ==
+           power_manager::PowerSupplyProperties_BatteryState_CHARGING ||
+       battery_state ==
+           power_manager::PowerSupplyProperties_BatteryState_FULL)) {
+    props_.set_battery_state(
+        power_manager::PowerSupplyProperties_BatteryState_FULL);
+    props_.set_battery_time_to_full_sec(0);
+    props_.set_battery_time_to_empty_sec(0);
+  } else if (battery_state ==
+             power_manager::PowerSupplyProperties_BatteryState_CHARGING) {
+    props_.set_battery_state(
+        power_manager::PowerSupplyProperties_BatteryState_CHARGING);
+    props_.set_battery_time_to_full_sec(kDefaultBatteryLifeSpanSec -
+                                        remaining_battery_sec);
+    props_.set_battery_time_to_empty_sec(0);
+  } else {
+    props_.set_battery_state(
+        power_manager::PowerSupplyProperties_BatteryState_DISCHARGING);
+    props_.set_battery_time_to_full_sec(0);
+    props_.set_battery_time_to_empty_sec(remaining_battery_sec);
+  }
+
+  // Checks if the battery is in a discharging state first before setting a
+  // charger. It wouldn't make sense for the battery to be discharging on AC,
+  // but it is possible for it to be discharging on low power USB.
+  if (props_.battery_state() ==
+      power_manager::PowerSupplyProperties_BatteryState_DISCHARGING) {
+    props_.set_external_power(
+        external_power == power_manager::PowerSupplyProperties_ExternalPower_USB
+            ? power_manager::PowerSupplyProperties_ExternalPower_USB
+            : power_manager::PowerSupplyProperties_ExternalPower_DISCONNECTED);
+  } else {
+    props_.set_external_power(
+        external_power == power_manager::PowerSupplyProperties_ExternalPower_USB
+            ? power_manager::PowerSupplyProperties_ExternalPower_USB
+            : power_manager::PowerSupplyProperties_ExternalPower_AC);
+  }
+
+  props_.set_battery_percent(battery_percent);
+  props_.set_is_calculating_battery_time(is_calculating_battery_time);
+
+  NotifyObservers();
+}
+
+void FakePowerManagerClient::NotifyObservers() {
+  FOR_EACH_OBSERVER(Observer, observers_, PowerChanged(props_));
+}
+
 void FakePowerManagerClient::HandleSuspendReadiness() {
   CHECK(num_pending_suspend_readiness_callbacks_ > 0);
 
   --num_pending_suspend_readiness_callbacks_;
 }
 
 } // namespace chromeos