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| 1 // Copyright (c) 2012 The Chromium Authors. All rights reserved. | 1 // Copyright (c) 2012 The Chromium Authors. All rights reserved. | 
| 2 // Use of this source code is governed by a BSD-style license that can be | 2 // Use of this source code is governed by a BSD-style license that can be | 
| 3 // found in the LICENSE file. | 3 // found in the LICENSE file. | 
| 4 | 4 | 
| 5 #ifndef CONTENT_BROWSER_GEOLOCATION_LOCATION_ARBITRATOR_H_ | 5 #ifndef CONTENT_BROWSER_GEOLOCATION_LOCATION_ARBITRATOR_H_ | 
| 6 #define CONTENT_BROWSER_GEOLOCATION_LOCATION_ARBITRATOR_H_ | 6 #define CONTENT_BROWSER_GEOLOCATION_LOCATION_ARBITRATOR_H_ | 
| 7 #pragma once | 7 #pragma once | 
| 8 | 8 | 
| 9 #include "base/memory/scoped_vector.h" | 9 #include "base/memory/scoped_vector.h" | 
| 10 #include "base/string16.h" | 10 #include "base/string16.h" | 
| 11 #include "base/time.h" | 11 #include "base/time.h" | 
| 12 #include "content/browser/geolocation/location_provider.h" | 12 #include "content/browser/geolocation/location_provider.h" | 
| 13 #include "content/browser/geolocation/geolocation_observer.h" | 13 #include "content/browser/geolocation/geolocation_observer.h" | 
| 14 #include "content/common/content_export.h" | 14 #include "content/common/content_export.h" | 
| 15 #include "content/common/geoposition.h" |  | 
| 16 #include "content/public/browser/access_token_store.h" | 15 #include "content/public/browser/access_token_store.h" | 
|  | 16 #include "content/public/common/geoposition.h" | 
| 17 #include "net/url_request/url_request_context_getter.h" | 17 #include "net/url_request/url_request_context_getter.h" | 
| 18 | 18 | 
| 19 class GeolocationArbitratorDependencyFactory; | 19 class GeolocationArbitratorDependencyFactory; | 
| 20 class LocationProviderBase; | 20 class LocationProviderBase; | 
| 21 | 21 | 
| 22 namespace content { | 22 namespace content { | 
| 23 class AccessTokenStore; | 23 class AccessTokenStore; | 
| 24 } | 24 } | 
| 25 | 25 | 
| 26 namespace net { | 26 namespace net { | 
| 27 class URLRequestContextGetter; | 27 class URLRequestContextGetter; | 
| 28 } | 28 } | 
| 29 | 29 | 
| 30 struct Geoposition; |  | 
| 31 |  | 
| 32 // This class is responsible for handling updates from multiple underlying | 30 // This class is responsible for handling updates from multiple underlying | 
| 33 // providers and resolving them to a single 'best' location fix at any given | 31 // providers and resolving them to a single 'best' location fix at any given | 
| 34 // moment. | 32 // moment. | 
| 35 class CONTENT_EXPORT GeolocationArbitrator | 33 class CONTENT_EXPORT GeolocationArbitrator | 
| 36     : public LocationProviderBase::ListenerInterface { | 34     : public LocationProviderBase::ListenerInterface { | 
| 37  public: | 35  public: | 
| 38   // Number of milliseconds newer a location provider has to be that it's worth | 36   // Number of milliseconds newer a location provider has to be that it's worth | 
| 39   // switching to this location provider on the basis of it being fresher | 37   // switching to this location provider on the basis of it being fresher | 
| 40   // (regardles of relative accuracy). Public for tests. | 38   // (regardles of relative accuracy). Public for tests. | 
| 41   static const int64 kFixStaleTimeoutMilliseconds; | 39   static const int64 kFixStaleTimeoutMilliseconds; | 
| (...skipping 35 matching lines...) Expand 10 before | Expand all | Expand 10 after  Loading... | 
| 77   // Takes ownership of |provider| on entry; it will either be added to | 75   // Takes ownership of |provider| on entry; it will either be added to | 
| 78   // |providers_| or deleted on error (e.g. it fails to start). | 76   // |providers_| or deleted on error (e.g. it fails to start). | 
| 79   void RegisterProvider(LocationProviderBase* provider); | 77   void RegisterProvider(LocationProviderBase* provider); | 
| 80   void OnAccessTokenStoresLoaded( | 78   void OnAccessTokenStoresLoaded( | 
| 81       content::AccessTokenStore::AccessTokenSet access_token_store, | 79       content::AccessTokenStore::AccessTokenSet access_token_store, | 
| 82       net::URLRequestContextGetter* context_getter); | 80       net::URLRequestContextGetter* context_getter); | 
| 83   void DoStartProviders(); | 81   void DoStartProviders(); | 
| 84   // Returns true if |new_position| is an improvement over |old_position|. | 82   // Returns true if |new_position| is an improvement over |old_position|. | 
| 85   // Set |from_same_provider| to true if both the positions came from the same | 83   // Set |from_same_provider| to true if both the positions came from the same | 
| 86   // provider. | 84   // provider. | 
| 87   bool IsNewPositionBetter(const Geoposition& old_position, | 85   bool IsNewPositionBetter(const content::Geoposition& old_position, | 
| 88                            const Geoposition& new_position, | 86                            const content::Geoposition& new_position, | 
| 89                            bool from_same_provider) const; | 87                            bool from_same_provider) const; | 
| 90 | 88 | 
| 91   scoped_refptr<GeolocationArbitratorDependencyFactory> dependency_factory_; | 89   scoped_refptr<GeolocationArbitratorDependencyFactory> dependency_factory_; | 
| 92   scoped_refptr<content::AccessTokenStore> access_token_store_; | 90   scoped_refptr<content::AccessTokenStore> access_token_store_; | 
| 93   GetTimeNow get_time_now_; | 91   GetTimeNow get_time_now_; | 
| 94   GeolocationObserver* observer_; | 92   GeolocationObserver* observer_; | 
| 95   ScopedVector<LocationProviderBase> providers_; | 93   ScopedVector<LocationProviderBase> providers_; | 
| 96   GeolocationObserverOptions current_provider_options_; | 94   GeolocationObserverOptions current_provider_options_; | 
| 97   // The provider which supplied the current |position_| | 95   // The provider which supplied the current |position_| | 
| 98   const LocationProviderBase* position_provider_; | 96   const LocationProviderBase* position_provider_; | 
| 99   bool is_permission_granted_; | 97   bool is_permission_granted_; | 
| 100   // The current best estimate of our position. | 98   // The current best estimate of our position. | 
| 101   Geoposition position_; | 99   content::Geoposition position_; | 
| 102 | 100 | 
| 103   DISALLOW_COPY_AND_ASSIGN(GeolocationArbitrator); | 101   DISALLOW_COPY_AND_ASSIGN(GeolocationArbitrator); | 
| 104 }; | 102 }; | 
| 105 | 103 | 
| 106 #endif  // CONTENT_BROWSER_GEOLOCATION_LOCATION_ARBITRATOR_H_ | 104 #endif  // CONTENT_BROWSER_GEOLOCATION_LOCATION_ARBITRATOR_H_ | 
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