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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 // A location provider provides position information from a particular source | 5 // A location provider provides position information from a particular source |
| 6 // (GPS, network etc). | 6 // (GPS, network etc). |
| 7 // | 7 // |
| 8 // This file declares a base class to be used by all location providers. | 8 // This file declares a base class to be used by all location providers. |
| 9 // Primarily, this class declares interface methods to be implemented by | 9 // Primarily, this class declares interface methods to be implemented by |
| 10 // derived classes. | 10 // derived classes. |
| 11 | 11 |
| 12 #ifndef CONTENT_BROWSER_GEOLOCATION_LOCATION_PROVIDER_H_ | 12 #ifndef CONTENT_BROWSER_GEOLOCATION_LOCATION_PROVIDER_H_ |
| 13 #define CONTENT_BROWSER_GEOLOCATION_LOCATION_PROVIDER_H_ | 13 #define CONTENT_BROWSER_GEOLOCATION_LOCATION_PROVIDER_H_ |
| 14 #pragma once | 14 #pragma once |
| 15 | 15 |
| 16 #include <map> | 16 #include <map> |
| 17 | 17 |
| 18 #include "base/string16.h" | 18 #include "base/string16.h" |
| 19 #include "base/threading/non_thread_safe.h" | 19 #include "base/threading/non_thread_safe.h" |
| 20 #include "content/common/content_export.h" | 20 #include "content/common/content_export.h" |
| 21 | 21 |
| 22 struct Geoposition; | |
| 23 class GURL; | 22 class GURL; |
| 24 | 23 |
| 25 namespace content { | 24 namespace content { |
| 26 class AccessTokenStore; | 25 class AccessTokenStore; |
| 26 struct Geoposition; |
| 27 } | 27 } |
| 28 | 28 |
| 29 namespace net { | 29 namespace net { |
| 30 class URLRequestContextGetter; | 30 class URLRequestContextGetter; |
| 31 } | 31 } |
| 32 | 32 |
| 33 // The base class used by all location providers. | 33 // The base class used by all location providers. |
| 34 class CONTENT_EXPORT LocationProviderBase | 34 class CONTENT_EXPORT LocationProviderBase |
| 35 : NON_EXPORTED_BASE(public base::NonThreadSafe) { | 35 : NON_EXPORTED_BASE(public base::NonThreadSafe) { |
| 36 public: | 36 public: |
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| 62 // It may block if a callback is in progress. | 62 // It may block if a callback is in progress. |
| 63 void UnregisterListener(ListenerInterface* listener); | 63 void UnregisterListener(ListenerInterface* listener); |
| 64 | 64 |
| 65 // Interface methods | 65 // Interface methods |
| 66 // StartProvider maybe called multiple times, e.g. to alter the | 66 // StartProvider maybe called multiple times, e.g. to alter the |
| 67 // |high_accuracy| setting. Returns false if a fatal error was encountered | 67 // |high_accuracy| setting. Returns false if a fatal error was encountered |
| 68 // which prevented the provider from starting. | 68 // which prevented the provider from starting. |
| 69 virtual bool StartProvider(bool high_accuracy) = 0; | 69 virtual bool StartProvider(bool high_accuracy) = 0; |
| 70 virtual void StopProvider() = 0; | 70 virtual void StopProvider() = 0; |
| 71 // Gets the current best position estimate. | 71 // Gets the current best position estimate. |
| 72 virtual void GetPosition(Geoposition* position) = 0; | 72 virtual void GetPosition(content::Geoposition* position) = 0; |
| 73 // Provides a hint to the provider that new location data is needed as soon | 73 // Provides a hint to the provider that new location data is needed as soon |
| 74 // as possible. Default implementation does nothing. | 74 // as possible. Default implementation does nothing. |
| 75 virtual void UpdatePosition() {} | 75 virtual void UpdatePosition() {} |
| 76 // Delegated to the provider by GeolocationArbitrator. See the corresponding | 76 // Delegated to the provider by GeolocationArbitrator. See the corresponding |
| 77 // method on that class for more details. | 77 // method on that class for more details. |
| 78 virtual void OnPermissionGranted() {} | 78 virtual void OnPermissionGranted() {} |
| 79 | 79 |
| 80 bool has_listeners() const; | 80 bool has_listeners() const; |
| 81 | 81 |
| 82 protected: | 82 protected: |
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| 96 // Factory functions for the various types of location provider to abstract | 96 // Factory functions for the various types of location provider to abstract |
| 97 // over the platform-dependent implementations. | 97 // over the platform-dependent implementations. |
| 98 CONTENT_EXPORT LocationProviderBase* NewNetworkLocationProvider( | 98 CONTENT_EXPORT LocationProviderBase* NewNetworkLocationProvider( |
| 99 content::AccessTokenStore* access_token_store, | 99 content::AccessTokenStore* access_token_store, |
| 100 net::URLRequestContextGetter* context, | 100 net::URLRequestContextGetter* context, |
| 101 const GURL& url, | 101 const GURL& url, |
| 102 const string16& access_token); | 102 const string16& access_token); |
| 103 LocationProviderBase* NewSystemLocationProvider(); | 103 LocationProviderBase* NewSystemLocationProvider(); |
| 104 | 104 |
| 105 #endif // CONTENT_BROWSER_GEOLOCATION_LOCATION_PROVIDER_H_ | 105 #endif // CONTENT_BROWSER_GEOLOCATION_LOCATION_PROVIDER_H_ |
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