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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 DEVICE_GEOLOCATION_LOCATION_ARBITRATOR_IMPL_H_ | 5 #ifndef DEVICE_GEOLOCATION_LOCATION_ARBITRATOR_H_ |
6 #define DEVICE_GEOLOCATION_LOCATION_ARBITRATOR_IMPL_H_ | 6 #define DEVICE_GEOLOCATION_LOCATION_ARBITRATOR_H_ |
7 | 7 |
8 #include <stdint.h> | 8 #include <stdint.h> |
9 #include <memory> | 9 #include <memory> |
10 #include <vector> | 10 #include <vector> |
11 | 11 |
12 #include "base/callback_forward.h" | 12 #include "base/callback_forward.h" |
13 #include "base/cancelable_callback.h" | 13 #include "base/cancelable_callback.h" |
14 #include "base/macros.h" | 14 #include "base/macros.h" |
15 #include "base/memory/scoped_vector.h" | 15 #include "base/memory/scoped_vector.h" |
16 #include "base/strings/string16.h" | 16 #include "base/strings/string16.h" |
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27 } | 27 } |
28 | 28 |
29 namespace device { | 29 namespace device { |
30 class AccessTokenStore; | 30 class AccessTokenStore; |
31 class GeolocationDelegate; | 31 class GeolocationDelegate; |
32 class LocationProvider; | 32 class LocationProvider; |
33 | 33 |
34 // This class is responsible for handling updates from multiple underlying | 34 // This class is responsible for handling updates from multiple underlying |
35 // providers and resolving them to a single 'best' location fix at any given | 35 // providers and resolving them to a single 'best' location fix at any given |
36 // moment. | 36 // moment. |
37 class DEVICE_GEOLOCATION_EXPORT LocationArbitratorImpl | 37 class DEVICE_GEOLOCATION_EXPORT LocationArbitrator : public LocationProvider { |
38 : public LocationProvider { | |
39 public: | 38 public: |
40 // Number of milliseconds newer a location provider has to be that it's worth | 39 // Number of milliseconds newer a location provider has to be that it's worth |
41 // switching to this location provider on the basis of it being fresher | 40 // switching to this location provider on the basis of it being fresher |
42 // (regardles of relative accuracy). Public for tests. | 41 // (regardles of relative accuracy). Public for tests. |
43 static const int64_t kFixStaleTimeoutMilliseconds; | 42 static const int64_t kFixStaleTimeoutMilliseconds; |
44 | 43 |
45 explicit LocationArbitratorImpl(GeolocationDelegate* delegate); | 44 explicit LocationArbitrator(GeolocationDelegate* delegate); |
46 ~LocationArbitratorImpl() override; | 45 ~LocationArbitrator() override; |
47 | 46 |
48 static GURL DefaultNetworkProviderURL(); | 47 static GURL DefaultNetworkProviderURL(); |
49 bool HasPermissionBeenGrantedForTest() const; | 48 bool HasPermissionBeenGrantedForTest() const; |
50 | 49 |
51 // LocationProvider implementation. | 50 // LocationProvider implementation. |
52 void SetUpdateCallback( | 51 void SetUpdateCallback( |
53 const LocationProviderUpdateCallback& callback) override; | 52 const LocationProviderUpdateCallback& callback) override; |
54 bool StartProvider(bool enable_high_accuracy) override; | 53 bool StartProvider(bool enable_high_accuracy) override; |
55 void StopProvider() override; | 54 void StopProvider() override; |
56 const Geoposition& GetPosition() override; | 55 const Geoposition& GetPosition() override; |
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109 bool enable_high_accuracy_; | 108 bool enable_high_accuracy_; |
110 // The provider which supplied the current |position_| | 109 // The provider which supplied the current |position_| |
111 const LocationProvider* position_provider_; | 110 const LocationProvider* position_provider_; |
112 bool is_permission_granted_; | 111 bool is_permission_granted_; |
113 // The current best estimate of our position. | 112 // The current best estimate of our position. |
114 Geoposition position_; | 113 Geoposition position_; |
115 | 114 |
116 // Tracks whether providers should be running. | 115 // Tracks whether providers should be running. |
117 bool is_running_; | 116 bool is_running_; |
118 | 117 |
119 DISALLOW_COPY_AND_ASSIGN(LocationArbitratorImpl); | 118 DISALLOW_COPY_AND_ASSIGN(LocationArbitrator); |
120 }; | 119 }; |
121 | 120 |
122 // Factory functions for the various types of location provider to abstract | 121 // Factory functions for the various types of location provider to abstract |
123 // over the platform-dependent implementations. | 122 // over the platform-dependent implementations. |
124 std::unique_ptr<LocationProvider> NewSystemLocationProvider(); | 123 std::unique_ptr<LocationProvider> NewSystemLocationProvider(); |
125 | 124 |
126 } // namespace device | 125 } // namespace device |
127 | 126 |
128 #endif // DEVICE_GEOLOCATION_LOCATION_ARBITRATOR_IMPL_H_ | 127 #endif // DEVICE_GEOLOCATION_LOCATION_ARBITRATOR_H_ |
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