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 &&

[Daniel Erat, 2015/07/07 21:30:56]

i'm still not convinced that it makes sense to do a bunch of validation here.
this is just going to be used by developers to manually exercise the ui code, so
why not let them check that it handles implausible combinations if they want to?
that would make this method much simpler:

  props_.set_battery_percent(battery_percent);
  props_.set_is_calculating_battery_time(is_calculating_battery_time);
  props_.set_battery_state(battery_state);
  props_.set_external_power(external_power);
  // keep existing time_to_full/empty_sec code...
  NotifyObservers();

[mozartalouis, 2015/07/08 23:13:02]

Done.

+      (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