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| 1 // Copyright (c) 2010 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 // This file contains the class definitions for the CoreLocation data provider | |
| 6 // class and the accompanying Objective C wrapper class. This data provider | |
| 7 // is used to allow the CoreLocation wrapper to run on the UI thread, since | |
| 8 // CLLocationManager's start and stop updating methods must be called from a | |
| 9 // thread with an active NSRunLoop. Currently only the UI thread appears to | |
| 10 // fill that requirement. | |
| 11 | |
| 12 #include "chrome/browser/geolocation/core_location_data_provider_mac.h" | |
| 13 #include "chrome/browser/geolocation/core_location_provider_mac.h" | |
| 14 #include "chrome/browser/geolocation/geolocation_provider.h" | |
| 15 #include "base/logging.h" | |
| 16 #include "base/time.h" | |
| 17 | |
| 18 // A few required declarations since the CoreLocation headers are not available | |
| 19 // with the Mac OS X 10.5 SDK. | |
| 20 // TODO(jorgevillatoro): Remove these declarations when we build against 10.6 | |
| 21 | |
| 22 // This idea was borrowed from wifi_data_provider_corewlan_mac.mm | |
| 23 typedef double CLLocationDegrees; | |
| 24 typedef double CLLocationAccuracy; | |
| 25 typedef double CLLocationSpeed; | |
| 26 typedef double CLLocationDirection; | |
| 27 typedef double CLLocationDistance; | |
| 28 typedef struct { | |
| 29 CLLocationDegrees latitude; | |
| 30 CLLocationDegrees longitude; | |
| 31 } CLLocationCoordinate2D; | |
| 32 | |
| 33 enum { | |
| 34 kCLErrorLocationUnknown = 0, | |
| 35 kCLErrorDenied | |
| 36 }; | |
| 37 | |
| 38 @interface CLLocationManager : NSObject | |
| 39 + (BOOL)locationServicesEnabled; | |
| 40 @property(assign) id delegate; | |
| 41 - (void)startUpdatingLocation; | |
| 42 - (void)stopUpdatingLocation; | |
| 43 @end | |
| 44 | |
| 45 @interface CLLocation : NSObject<NSCopying, NSCoding> | |
| 46 @property(readonly) CLLocationCoordinate2D coordinate; | |
| 47 @property(readonly) CLLocationDistance altitude; | |
| 48 @property(readonly) CLLocationAccuracy horizontalAccuracy; | |
| 49 @property(readonly) CLLocationAccuracy verticalAccuracy; | |
| 50 @property(readonly) CLLocationDirection course; | |
| 51 @property(readonly) CLLocationSpeed speed; | |
| 52 @end | |
| 53 | |
| 54 @protocol CLLocationManagerDelegate | |
| 55 - (void)locationManager:(CLLocationManager*)manager | |
| 56 didUpdateToLocation:(CLLocation*)newLocation | |
| 57 fromLocation:(CLLocation*)oldLocation; | |
| 58 - (void)locationManager:(CLLocationManager*)manager | |
| 59 didFailWithError:(NSError*)error; | |
| 60 @end | |
| 61 | |
| 62 // This wrapper class receives CLLocation objects from CoreLocation, converts | |
| 63 // them to Geoposition objects, and passes them on to the data provider class | |
| 64 // Note: This class has some specific threading requirements, inherited from | |
| 65 // CLLocationManager. The location manaager's start and stop updating | |
| 66 // methods must be called from a thread that has an active run loop (which | |
| 67 // seems to only be the UI thread) | |
| 68 @interface CoreLocationWrapperMac : NSObject<CLLocationManagerDelegate> | |
| 69 { | |
| 70 @private | |
| 71 NSBundle* bundle_; | |
| 72 Class locationManagerClass_; | |
| 73 id locationManager_; | |
| 74 CoreLocationDataProviderMac* dataProvider_; | |
| 75 } | |
| 76 | |
| 77 - (id)initWithDataProvider:(CoreLocationDataProviderMac*)dataProvider; | |
| 78 - (void)dealloc; | |
| 79 | |
| 80 // Can be called from any thread since it does not require an NSRunLoop. However | |
| 81 // it is not threadsafe to receive concurrent calls until after it's first | |
| 82 // successful call (to avoid |bundle_| being double initialized) | |
| 83 - (BOOL)locationDataAvailable; | |
| 84 | |
| 85 // These should always be called from BrowserThread::UI | |
| 86 - (void)startLocation; | |
| 87 - (void)stopLocation; | |
| 88 | |
| 89 // These should only be called by CLLocationManager | |
| 90 - (void)locationManager:(CLLocationManager*)manager | |
| 91 didUpdateToLocation:(CLLocation*)newLocation | |
| 92 fromLocation:(CLLocation*)oldLocation; | |
| 93 - (void)locationManager:(CLLocationManager*)manager | |
| 94 didFailWithError:(NSError*)error; | |
| 95 - (BOOL)loadCoreLocationBundle; | |
| 96 | |
| 97 @end | |
| 98 | |
| 99 @implementation CoreLocationWrapperMac | |
| 100 | |
| 101 - (id)initWithDataProvider:(CoreLocationDataProviderMac*)dataProvider { | |
| 102 DCHECK(dataProvider); | |
| 103 dataProvider_ = dataProvider; | |
| 104 self = [super init]; | |
| 105 return self; | |
| 106 } | |
| 107 | |
| 108 - (void)dealloc { | |
| 109 [locationManager_ release]; | |
| 110 [locationManagerClass_ release]; | |
| 111 [bundle_ release]; | |
| 112 [super dealloc]; | |
| 113 } | |
| 114 | |
| 115 // Load the bundle and check to see if location services are enabled | |
| 116 // but don't do anything else | |
| 117 - (BOOL)locationDataAvailable { | |
| 118 return ([self loadCoreLocationBundle] && | |
| 119 [locationManagerClass_ locationServicesEnabled]); | |
| 120 } | |
| 121 | |
| 122 - (void)startLocation { | |
| 123 if ([self locationDataAvailable]) { | |
| 124 if (!locationManager_) { | |
| 125 locationManager_ = [[locationManagerClass_ alloc] init]; | |
| 126 [locationManager_ setDelegate:self]; | |
| 127 } | |
| 128 [locationManager_ startUpdatingLocation]; | |
| 129 } | |
| 130 } | |
| 131 | |
| 132 - (void)stopLocation { | |
| 133 [locationManager_ stopUpdatingLocation]; | |
| 134 } | |
| 135 | |
| 136 - (void)locationManager:(CLLocationManager*)manager | |
| 137 didUpdateToLocation:(CLLocation*)newLocation | |
| 138 fromLocation:(CLLocation*)oldLocation { | |
| 139 Geoposition position; | |
| 140 position.latitude = [newLocation coordinate].latitude; | |
| 141 position.longitude = [newLocation coordinate].longitude; | |
| 142 position.altitude = [newLocation altitude]; | |
| 143 position.accuracy = [newLocation horizontalAccuracy]; | |
| 144 position.altitude_accuracy = [newLocation verticalAccuracy]; | |
| 145 position.speed = [newLocation speed]; | |
| 146 position.heading = [newLocation course]; | |
| 147 position.timestamp = base::Time::Now(); | |
| 148 position.error_code = Geoposition::ERROR_CODE_NONE; | |
| 149 dataProvider_->UpdatePosition(&position); | |
| 150 } | |
| 151 | |
| 152 - (void)locationManager:(CLLocationManager*)manager | |
| 153 didFailWithError:(NSError*)error { | |
| 154 Geoposition position; | |
| 155 switch ([error code]) { | |
| 156 case kCLErrorLocationUnknown: | |
| 157 position.error_code = Geoposition::ERROR_CODE_POSITION_UNAVAILABLE; | |
| 158 break; | |
| 159 case kCLErrorDenied: | |
| 160 position.error_code = Geoposition::ERROR_CODE_PERMISSION_DENIED; | |
| 161 break; | |
| 162 default: | |
| 163 NOTREACHED() << "Unknown CoreLocation error: " << [error code]; | |
| 164 return; | |
| 165 } | |
| 166 dataProvider_->UpdatePosition(&position); | |
| 167 } | |
| 168 | |
| 169 - (BOOL)loadCoreLocationBundle { | |
| 170 if (!bundle_) { | |
| 171 bundle_ = [[NSBundle alloc] | |
| 172 initWithPath:@"/System/Library/Frameworks/CoreLocation.framework"]; | |
| 173 if (!bundle_) { | |
| 174 DLOG(WARNING) << "Couldn't load CoreLocation Framework"; | |
| 175 return NO; | |
| 176 } | |
| 177 | |
| 178 locationManagerClass_ = [bundle_ classNamed:@"CLLocationManager"]; | |
| 179 } | |
| 180 | |
| 181 return YES; | |
| 182 } | |
| 183 | |
| 184 @end | |
| 185 | |
| 186 CoreLocationDataProviderMac::CoreLocationDataProviderMac() { | |
| 187 if (MessageLoop::current() != | |
| 188 GeolocationProvider::GetInstance()->message_loop()) { | |
| 189 NOTREACHED() << "CoreLocation data provider must be created on " | |
| 190 "the Geolocation thread."; | |
| 191 } | |
| 192 provider_ = NULL; | |
| 193 wrapper_.reset([[CoreLocationWrapperMac alloc] initWithDataProvider:this]); | |
| 194 } | |
| 195 | |
| 196 CoreLocationDataProviderMac::~CoreLocationDataProviderMac() { | |
| 197 } | |
| 198 | |
| 199 // Returns true if the CoreLocation wrapper can load the framework and | |
| 200 // location services are enabled. The pointer argument will only be accessed | |
| 201 // in the origin thread. | |
| 202 bool CoreLocationDataProviderMac:: | |
| 203 StartUpdating(CoreLocationProviderMac* provider) { | |
| 204 DCHECK(provider); | |
| 205 DCHECK(!provider_) << "StartUpdating called twice"; | |
| 206 if (![wrapper_ locationDataAvailable]) return false; | |
| 207 provider_ = provider; | |
| 208 BrowserThread::PostTask(BrowserThread::UI, FROM_HERE, | |
| 209 NewRunnableMethod(this, &CoreLocationDataProviderMac::StartUpdatingTask)); | |
| 210 return true; | |
| 211 } | |
| 212 | |
| 213 // Clears provider_ so that any leftover messages from CoreLocation get ignored | |
| 214 void CoreLocationDataProviderMac::StopUpdating() { | |
| 215 provider_ = NULL; | |
| 216 BrowserThread::PostTask(BrowserThread::UI, FROM_HERE, | |
| 217 NewRunnableMethod(this, | |
| 218 &CoreLocationDataProviderMac::StopUpdatingTask)); | |
| 219 } | |
| 220 | |
| 221 void CoreLocationDataProviderMac::UpdatePosition(Geoposition *position) { | |
| 222 GeolocationProvider::GetInstance()->message_loop()->PostTask(FROM_HERE, | |
| 223 NewRunnableMethod(this, | |
| 224 &CoreLocationDataProviderMac::PositionUpdated, | |
| 225 *position)); | |
| 226 } | |
| 227 | |
| 228 // Runs in BrowserThread::UI | |
| 229 void CoreLocationDataProviderMac::StartUpdatingTask() { | |
| 230 DCHECK(BrowserThread::CurrentlyOn(BrowserThread::UI)); | |
| 231 [wrapper_ startLocation]; | |
| 232 } | |
| 233 | |
| 234 // Runs in BrowserThread::UI | |
| 235 void CoreLocationDataProviderMac::StopUpdatingTask() { | |
| 236 DCHECK(BrowserThread::CurrentlyOn(BrowserThread::UI)); | |
| 237 [wrapper_ stopLocation]; | |
| 238 } | |
| 239 | |
| 240 void CoreLocationDataProviderMac::PositionUpdated(Geoposition position) { | |
| 241 DCHECK(MessageLoop::current() == | |
| 242 GeolocationProvider::GetInstance()->message_loop()); | |
| 243 if (provider_) | |
| 244 provider_->SetPosition(&position); | |
| 245 } | |
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Chromium Code Reviews
Issue 6591034:
Move core pieces of geolocation from chrome to content.... (Closed)
Base URL: svn://chrome-svn/chrome/trunk/src/