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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 <CoreFoundation/CoreFoundation.h> |
| 8 #include <IOKit/ps/IOPowerSources.h> |
| 9 #include <IOKit/ps/IOPSKeys.h> |
| 10 |
| 11 #include "base/mac/foundation_util.h" |
| 12 #include "base/mac/scoped_cftyperef.h" |
| 13 #include "base/memory/ref_counted.h" |
| 14 #include "base/time/time.h" |
| 15 #include "content/public/browser/browser_thread.h" |
| 16 #include "third_party/WebKit/public/platform/WebBatteryStatus.h" |
| 17 |
| 18 namespace content { |
| 19 |
| 20 namespace { |
| 21 |
| 22 typedef BatteryStatusService::BatteryUpdateCallback BatteryCallback; |
| 23 |
| 24 // Returns the value corresponding to |key| in the dictionary |description|. |
| 25 // Returns |default_value| if the dictionary does not contain |key|, the |
| 26 // corresponding value is NULL or it could not be converted to SInt64. |
| 27 SInt64 GetValueAsSInt64(CFDictionaryRef description, |
| 28 CFStringRef key, |
| 29 SInt64 default_value) { |
| 30 CFNumberRef number = |
| 31 base::mac::GetValueFromDictionary<CFNumberRef>(description, key); |
| 32 SInt64 value; |
| 33 |
| 34 if (number && CFNumberGetValue(number, kCFNumberSInt64Type, &value)) |
| 35 return value; |
| 36 |
| 37 return default_value; |
| 38 } |
| 39 |
| 40 bool GetValueAsBoolean(CFDictionaryRef description, |
| 41 CFStringRef key, |
| 42 bool default_value) { |
| 43 CFBooleanRef boolean = |
| 44 base::mac::GetValueFromDictionary<CFBooleanRef>(description, key); |
| 45 |
| 46 return boolean ? CFBooleanGetValue(boolean) : default_value; |
| 47 } |
| 48 |
| 49 bool CFStringsAreEqual(CFStringRef string1, CFStringRef string2) { |
| 50 if (!string1 || !string2) |
| 51 return false; |
| 52 return CFStringCompare(string1, string2, 0) == kCFCompareEqualTo; |
| 53 } |
| 54 |
| 55 void FetchBatteryStatus(CFDictionaryRef description, |
| 56 blink::WebBatteryStatus& status) { |
| 57 CFStringRef current_state = |
| 58 base::mac::GetValueFromDictionary<CFStringRef>(description, |
| 59 CFSTR(kIOPSPowerSourceStateKey)); |
| 60 |
| 61 bool on_battery_power = |
| 62 CFStringsAreEqual(current_state, CFSTR(kIOPSBatteryPowerValue)); |
| 63 bool is_charging = |
| 64 GetValueAsBoolean(description, CFSTR(kIOPSIsChargingKey), true); |
| 65 bool is_charged = |
| 66 GetValueAsBoolean(description, CFSTR(kIOPSIsChargedKey), false); |
| 67 |
| 68 status.charging = !on_battery_power || is_charging; |
| 69 |
| 70 SInt64 current_capacity = |
| 71 GetValueAsSInt64(description, CFSTR(kIOPSCurrentCapacityKey), -1); |
| 72 SInt64 max_capacity = |
| 73 GetValueAsSInt64(description, CFSTR(kIOPSMaxCapacityKey), -1); |
| 74 |
| 75 // Set level if it is available and valid. Otherwise leave the default value, |
| 76 // which is 1. |
| 77 if (current_capacity != -1 && max_capacity != -1 && |
| 78 current_capacity <= max_capacity && max_capacity != 0) { |
| 79 status.level = current_capacity / static_cast<double>(max_capacity); |
| 80 } |
| 81 |
| 82 if (is_charging) { |
| 83 SInt64 charging_time = |
| 84 GetValueAsSInt64(description, CFSTR(kIOPSTimeToFullChargeKey), -1); |
| 85 |
| 86 // Battery is charging: set the charging time if it's available, otherwise |
| 87 // set to +infinity. |
| 88 status.chargingTime = charging_time != -1 |
| 89 ? base::TimeDelta::FromMinutes(charging_time).InSeconds() |
| 90 : std::numeric_limits<double>::infinity(); |
| 91 } else { |
| 92 // Battery is not charging. |
| 93 // Set chargingTime to +infinity if the battery is not charged. Otherwise |
| 94 // leave the default value, which is 0. |
| 95 if (!is_charged) |
| 96 status.chargingTime = std::numeric_limits<double>::infinity(); |
| 97 |
| 98 // Set dischargingTime if it's available and valid, i.e. when on battery |
| 99 // power. Otherwise leave the default value, which is +infinity. |
| 100 if (on_battery_power) { |
| 101 SInt64 discharging_time = |
| 102 GetValueAsSInt64(description, CFSTR(kIOPSTimeToEmptyKey), -1); |
| 103 if (discharging_time != -1) { |
| 104 status.dischargingTime = |
| 105 base::TimeDelta::FromMinutes(discharging_time).InSeconds(); |
| 106 } |
| 107 } |
| 108 } |
| 109 } |
| 110 |
| 111 void OnBatteryStatusChanged(const BatteryCallback& callback) { |
| 112 DCHECK(BrowserThread::CurrentlyOn(BrowserThread::IO)); |
| 113 blink::WebBatteryStatus status; |
| 114 base::ScopedCFTypeRef<CFTypeRef> info(IOPSCopyPowerSourcesInfo()); |
| 115 base::ScopedCFTypeRef<CFArrayRef> power_sources_list( |
| 116 IOPSCopyPowerSourcesList(info)); |
| 117 CFIndex count = CFArrayGetCount(power_sources_list); |
| 118 |
| 119 bool internal_source_found = false; |
| 120 |
| 121 for (CFIndex i = 0; i < count; ++i) { |
| 122 CFDictionaryRef description = IOPSGetPowerSourceDescription(info, |
| 123 CFArrayGetValueAtIndex(power_sources_list, i)); |
| 124 |
| 125 if (!description) |
| 126 continue; |
| 127 |
| 128 CFStringRef transport_type = |
| 129 base::mac::GetValueFromDictionary<CFStringRef>(description, |
| 130 CFSTR(kIOPSTransportTypeKey)); |
| 131 |
| 132 bool internal_source = |
| 133 CFStringsAreEqual(transport_type, CFSTR(kIOPSInternalType)); |
| 134 bool source_present = |
| 135 GetValueAsBoolean(description, CFSTR(kIOPSIsPresentKey), false); |
| 136 |
| 137 if (internal_source && source_present) { |
| 138 // TODO(timvolodine): implement the case when there are multiple internal |
| 139 // sources, e.g. when multiple batteries are present. Currently this will |
| 140 // fail a DCHECK. |
| 141 DCHECK(!internal_source_found); |
| 142 FetchBatteryStatus(description, status); |
| 143 internal_source_found = true; |
| 144 } |
| 145 } |
| 146 |
| 147 callback.Run(status); |
| 148 } |
| 149 |
| 150 class BatteryStatusObserver |
| 151 : public base::RefCountedThreadSafe<BatteryStatusObserver> { |
| 152 public: |
| 153 explicit BatteryStatusObserver(const BatteryCallback& callback) |
| 154 : callback_(callback) {} |
| 155 |
| 156 void Start() { |
| 157 // Need to start on a thread with UI-type message loop for |
| 158 // |notifier_run_loop_| to receive callbacks. |
| 159 if (BrowserThread::CurrentlyOn(BrowserThread::UI)) { |
| 160 StartOnUI(); |
| 161 } else { |
| 162 BrowserThread::PostTask( |
| 163 BrowserThread::UI, |
| 164 FROM_HERE, |
| 165 base::Bind(&BatteryStatusObserver::StartOnUI, this)); |
| 166 } |
| 167 } |
| 168 |
| 169 void Stop() { |
| 170 if (BrowserThread::CurrentlyOn(BrowserThread::UI)) { |
| 171 StopOnUI(); |
| 172 } else { |
| 173 BrowserThread::PostTask( |
| 174 BrowserThread::UI, |
| 175 FROM_HERE, |
| 176 base::Bind(&BatteryStatusObserver::StopOnUI, this)); |
| 177 } |
| 178 } |
| 179 |
| 180 private: |
| 181 friend class base::RefCountedThreadSafe<BatteryStatusObserver>; |
| 182 virtual ~BatteryStatusObserver() { DCHECK(!notifier_run_loop_source_); } |
| 183 |
| 184 void StartOnUI() { |
| 185 DCHECK(BrowserThread::CurrentlyOn(BrowserThread::UI)); |
| 186 |
| 187 if (notifier_run_loop_source_) |
| 188 return; |
| 189 |
| 190 notifier_run_loop_source_.reset( |
| 191 IOPSNotificationCreateRunLoopSource(OnBatteryStatusChangedUI, |
| 192 static_cast<void*>(&callback_))); |
| 193 if (!notifier_run_loop_source_) { |
| 194 LOG(ERROR) << "Failed to create battery status notification run loop"; |
| 195 // Make sure to execute to callback with the default values. |
| 196 callback_.Run(blink::WebBatteryStatus()); |
| 197 return; |
| 198 } |
| 199 |
| 200 OnBatteryStatusChangedUI(static_cast<void*>(&callback_)); |
| 201 CFRunLoopAddSource(CFRunLoopGetCurrent(), notifier_run_loop_source_, |
| 202 kCFRunLoopDefaultMode); |
| 203 } |
| 204 |
| 205 void StopOnUI() { |
| 206 DCHECK(BrowserThread::CurrentlyOn(BrowserThread::UI)); |
| 207 |
| 208 if (!notifier_run_loop_source_) |
| 209 return; |
| 210 |
| 211 CFRunLoopRemoveSource(CFRunLoopGetCurrent(), notifier_run_loop_source_, |
| 212 kCFRunLoopDefaultMode); |
| 213 notifier_run_loop_source_.reset(); |
| 214 } |
| 215 |
| 216 static void OnBatteryStatusChangedUI(void* callback) { |
| 217 DCHECK(BrowserThread::CurrentlyOn(BrowserThread::UI)); |
| 218 // Offload fetching of values and callback execution to the IO thread. |
| 219 BrowserThread::PostTask( |
| 220 BrowserThread::IO, |
| 221 FROM_HERE, |
| 222 base::Bind(&OnBatteryStatusChanged, |
| 223 *static_cast<BatteryCallback*>(callback))); |
| 224 } |
| 225 |
| 226 BatteryCallback callback_; |
| 227 base::ScopedCFTypeRef<CFRunLoopSourceRef> notifier_run_loop_source_; |
| 228 |
| 229 DISALLOW_COPY_AND_ASSIGN(BatteryStatusObserver); |
| 230 }; |
| 231 |
| 232 class BatteryStatusManagerMac : public BatteryStatusManager { |
| 233 public: |
| 234 explicit BatteryStatusManagerMac(const BatteryCallback& callback) |
| 235 : notifier_(new BatteryStatusObserver(callback)) {} |
| 236 |
| 237 virtual ~BatteryStatusManagerMac() { |
| 238 notifier_->Stop(); |
| 239 } |
| 240 |
| 241 // BatteryStatusManager: |
| 242 virtual bool StartListeningBatteryChange() OVERRIDE { |
| 243 DCHECK(BrowserThread::CurrentlyOn(BrowserThread::IO)); |
| 244 notifier_->Start(); |
| 245 return true; |
| 246 } |
| 247 |
| 248 virtual void StopListeningBatteryChange() OVERRIDE { |
| 249 DCHECK(BrowserThread::CurrentlyOn(BrowserThread::IO)); |
| 250 notifier_->Stop(); |
| 251 } |
| 252 |
| 253 private: |
| 254 scoped_refptr<BatteryStatusObserver> notifier_; |
| 255 |
| 256 DISALLOW_COPY_AND_ASSIGN(BatteryStatusManagerMac); |
| 257 }; |
| 258 |
| 259 } // end namespace |
| 260 |
| 261 // static |
| 262 scoped_ptr<BatteryStatusManager> BatteryStatusManager::Create( |
| 263 const BatteryStatusService::BatteryUpdateCallback& callback) { |
| 264 return scoped_ptr<BatteryStatusManager>( |
| 265 new BatteryStatusManagerMac(callback)); |
| 266 } |
| 267 |
| 268 } // namespace content |
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