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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.h" | |
| 6 | |
| 7 #include "base/memory/ref_counted.h" | |
| 8 #include "chromeos/dbus/dbus_thread_manager.h" | |
| 9 #include "chromeos/dbus/power_manager/power_supply_properties.pb.h" | |
| 10 #include "chromeos/dbus/power_manager_client.h" | |
| 11 #include "content/public/browser/browser_thread.h" | |
| 12 #include "third_party/WebKit/public/platform/WebBatteryStatus.h" | |
| 13 | |
| 14 namespace content { | |
| 15 | |
| 16 namespace { | |
| 17 | |
| 18 class PowerManagerObserver | |
| 19 : public chromeos::PowerManagerClient::Observer, | |
| 20 public base::RefCountedThreadSafe<PowerManagerObserver> { | |
| 21 public: | |
| 22 explicit PowerManagerObserver( | |
| 23 const BatteryStatusService::BatteryUpdateCallback& callback) | |
| 24 : callback_(callback), currently_listening_(false) {} | |
| 25 | |
| 26 // Starts listening for updates. It is safe to call this on any thread. | |
| 27 void Start() { | |
| 28 if (BrowserThread::CurrentlyOn(BrowserThread::UI)) { | |
| 29 StartOnUI(); | |
| 30 } else { | |
| 31 BrowserThread::PostTask( | |
| 32 BrowserThread::UI, | |
| 33 FROM_HERE, | |
| 34 base::Bind(&PowerManagerObserver::StartOnUI, this)); | |
| 35 } | |
| 36 } | |
| 37 | |
| 38 // Stops listening for updates. It is safe to call this on any thread. | |
| 39 void Stop() { | |
| 40 if (BrowserThread::CurrentlyOn(BrowserThread::UI)) { | |
| 41 StopOnUI(); | |
| 42 } else { | |
| 43 BrowserThread::PostTask( | |
| 44 BrowserThread::UI, | |
| 45 FROM_HERE, | |
| 46 base::Bind(&PowerManagerObserver::StopOnUI, this)); | |
| 47 } | |
| 48 } | |
| 49 | |
| 50 private: | |
| 51 friend class base::RefCountedThreadSafe<PowerManagerObserver>; | |
| 52 | |
| 53 virtual ~PowerManagerObserver() {} | |
| 54 | |
| 55 bool IsBatteryPresent( | |
| 56 const power_manager::PowerSupplyProperties& proto) const { | |
| 57 return proto.battery_state() != | |
| 58 power_manager::PowerSupplyProperties_BatteryState_NOT_PRESENT; | |
| 59 } | |
| 60 | |
| 61 bool IsUsbChargerConnected( | |
| 62 const power_manager::PowerSupplyProperties& proto) const { | |
| 63 return proto.external_power() == | |
| 64 power_manager::PowerSupplyProperties_ExternalPower_USB; | |
| 65 } | |
| 66 | |
| 67 bool IsBatteryCharging( | |
| 68 const power_manager::PowerSupplyProperties& proto) const { | |
| 69 return proto.battery_state() != | |
| 70 power_manager::PowerSupplyProperties_BatteryState_DISCHARGING; | |
| 71 } | |
| 72 | |
| 73 bool IsBatteryFull(const power_manager::PowerSupplyProperties& proto) const { | |
| 74 return proto.battery_state() == | |
| 75 power_manager::PowerSupplyProperties_BatteryState_FULL; | |
| 76 } | |
| 77 | |
| 78 double GetBatteryLevel( | |
| 79 const power_manager::PowerSupplyProperties& proto) const { | |
| 80 const double kMaxBatteryLevelProto = 100.f; | |
| 81 return proto.battery_percent() / kMaxBatteryLevelProto; | |
| 82 } | |
| 83 | |
| 84 void StartOnUI() { | |
| 85 DCHECK(BrowserThread::CurrentlyOn(BrowserThread::UI)); | |
| 86 if (currently_listening_) | |
| 87 return; | |
| 88 chromeos::PowerManagerClient* power_client = | |
| 89 chromeos::DBusThreadManager::Get()->GetPowerManagerClient(); | |
| 90 power_client->AddObserver(this); | |
| 91 power_client->RequestStatusUpdate(); | |
| 92 currently_listening_ = true; | |
| 93 } | |
| 94 | |
| 95 void StopOnUI() { | |
| 96 DCHECK(BrowserThread::CurrentlyOn(BrowserThread::UI)); | |
| 97 if (!currently_listening_) | |
| 98 return; | |
| 99 chromeos::DBusThreadManager::Get()->GetPowerManagerClient()->RemoveObserver( | |
| 100 this); | |
| 101 currently_listening_ = false; | |
| 102 } | |
| 103 | |
| 104 // chromeos::PowerManagerClient::Observer: | |
| 105 virtual void PowerChanged( | |
| 106 const power_manager::PowerSupplyProperties& proto) OVERRIDE { | |
| 107 DCHECK(BrowserThread::CurrentlyOn(BrowserThread::UI)); | |
| 108 blink::WebBatteryStatus status; | |
| 109 // Use the default values if there is no battery in the system. | |
| 110 if (IsBatteryPresent(proto)) { | |
| 111 // The charging status is unreliable if a low power charger is connected | |
| 112 // (i.e. usb). | |
| 113 bool status_unreliable = IsUsbChargerConnected(proto); | |
| 114 // Battery time is unreliable if it is still being computed. | |
| 115 bool time_unreliable = | |
| 116 status_unreliable || proto.is_calculating_battery_time(); | |
| 117 | |
| 118 // Set |charging| only if the status is reliable. Otherwise, keep the | |
| 119 // default (which is |true|). | |
| 120 if (!status_unreliable) | |
| 121 status.charging = IsBatteryCharging(proto); | |
| 122 | |
| 123 // Set |chargingTime| to +infinity if the battery is discharging, or if | |
| 124 // the time is unreliable. Keep the default value (which is 0) if the | |
| 125 // battery is full. | |
| 126 if (time_unreliable || !status.charging) | |
| 127 status.chargingTime = std::numeric_limits<double>::infinity(); | |
| 128 else if (!IsBatteryFull(proto)) | |
| 129 status.chargingTime = proto.battery_time_to_full_sec(); | |
| 130 | |
| 131 // Keep the default value for |dischargingTime| (which is +infinity) if | |
| 132 // the time is unreliable, or if the battery is charging. | |
| 133 if (!time_unreliable && !status.charging) | |
| 134 status.dischargingTime = proto.battery_time_to_empty_sec(); | |
| 135 | |
| 136 status.level = GetBatteryLevel(proto); | |
| 137 } | |
| 138 callback_.Run(status); | |
| 139 } | |
| 140 | |
| 141 BatteryStatusService::BatteryUpdateCallback callback_; | |
| 142 bool currently_listening_; | |
| 143 | |
| 144 DISALLOW_COPY_AND_ASSIGN(PowerManagerObserver); | |
| 145 }; | |
| 146 | |
| 147 class BatteryStatusManagerChromeOS | |
| 148 : public BatteryStatusManager, | |
| 149 public chromeos::PowerManagerClient::Observer { | |
| 150 public: | |
| 151 explicit BatteryStatusManagerChromeOS( | |
| 152 const BatteryStatusService::BatteryUpdateCallback& callback) | |
| 153 : observer_(new PowerManagerObserver(callback)) {} | |
| 154 | |
| 155 virtual ~BatteryStatusManagerChromeOS() { observer_->Stop(); } | |
| 156 | |
| 157 private: | |
| 158 // BatteryStatusManager: | |
| 159 virtual bool StartListeningBatteryChange() OVERRIDE { | |
| 160 DCHECK(BrowserThread::CurrentlyOn(BrowserThread::IO)); | |
| 161 observer_->Start(); | |
| 162 return true; | |
| 163 } | |
| 164 | |
| 165 virtual void StopListeningBatteryChange() OVERRIDE { | |
| 166 DCHECK(BrowserThread::CurrentlyOn(BrowserThread::IO)); | |
| 167 observer_->Stop(); | |
| 168 } | |
| 169 | |
| 170 scoped_refptr<PowerManagerObserver> observer_; | |
| 171 | |
| 172 DISALLOW_COPY_AND_ASSIGN(BatteryStatusManagerChromeOS); | |
| 173 }; | |
| 174 | |
| 175 } // namespace | |
| 176 | |
| 177 // static | |
| 178 scoped_ptr<BatteryStatusManager> BatteryStatusManager::Create( | |
| 179 const BatteryStatusService::BatteryUpdateCallback& callback) { | |
| 180 return scoped_ptr<BatteryStatusManager>( | |
| 181 new BatteryStatusManagerChromeOS(callback)); | |
| 182 } | |
| 183 | |
| 184 } // namespace content | |
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Chromium Code Reviews
Issue 457933002:
Replace Chrome IPC with Mojo IPC for querying BatteryStatus service
Base URL: svn://svn.chromium.org/chrome/trunk/src