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| 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 |
| 3 // found in the LICENSE file. |
| 4 |
| 5 #ifndef CONTENT_BROWSER_GEOLOCATION_GEOLOCATION_PROVIDER_IMPL_H_ |
| 6 #define CONTENT_BROWSER_GEOLOCATION_GEOLOCATION_PROVIDER_IMPL_H_ |
| 7 |
| 8 #include <list> |
| 9 #include <memory> |
| 10 #include <vector> |
| 11 |
| 12 #include "base/callback_forward.h" |
| 13 #include "base/compiler_specific.h" |
| 14 #include "base/macros.h" |
| 15 #include "base/threading/thread.h" |
| 16 #include "content/common/content_export.h" |
| 17 #include "content/public/browser/geolocation_provider.h" |
| 18 #include "content/public/common/geoposition.h" |
| 19 |
| 20 namespace base { |
| 21 template<typename Type> struct DefaultSingletonTraits; |
| 22 } |
| 23 |
| 24 namespace content { |
| 25 class LocationArbitrator; |
| 26 |
| 27 class CONTENT_EXPORT GeolocationProviderImpl |
| 28 : public NON_EXPORTED_BASE(GeolocationProvider), |
| 29 public base::Thread { |
| 30 public: |
| 31 // GeolocationProvider implementation: |
| 32 std::unique_ptr<GeolocationProvider::Subscription> AddLocationUpdateCallback( |
| 33 const LocationUpdateCallback& callback, |
| 34 bool enable_high_accuracy) override; |
| 35 void UserDidOptIntoLocationServices() override; |
| 36 void OverrideLocationForTesting(const Geoposition& position) override; |
| 37 |
| 38 // Callback from the LocationArbitrator. Public for testing. |
| 39 void OnLocationUpdate(const Geoposition& position); |
| 40 |
| 41 // Gets a pointer to the singleton instance of the location relayer, which |
| 42 // is in turn bound to the browser's global context objects. This must only be |
| 43 // called on the UI thread so that the GeolocationProviderImpl is always |
| 44 // instantiated on the same thread. Ownership is NOT returned. |
| 45 static GeolocationProviderImpl* GetInstance(); |
| 46 |
| 47 bool user_did_opt_into_location_services_for_testing() { |
| 48 return user_did_opt_into_location_services_; |
| 49 } |
| 50 |
| 51 protected: |
| 52 friend struct base::DefaultSingletonTraits<GeolocationProviderImpl>; |
| 53 GeolocationProviderImpl(); |
| 54 ~GeolocationProviderImpl() override; |
| 55 |
| 56 // Useful for injecting mock geolocation arbitrator in tests. |
| 57 // TODO(mvanouwerkerk): Use something like SetArbitratorForTesting instead. |
| 58 virtual std::unique_ptr<LocationArbitrator> CreateArbitrator(); |
| 59 |
| 60 private: |
| 61 bool OnGeolocationThread() const; |
| 62 |
| 63 // Start and stop providers as needed when clients are added or removed. |
| 64 void OnClientsChanged(); |
| 65 |
| 66 // Stops the providers when there are no more registered clients. Note that |
| 67 // once the Geolocation thread is started, it will stay alive (but sitting |
| 68 // idle without any pending messages). |
| 69 void StopProviders(); |
| 70 |
| 71 // Starts the geolocation providers or updates their options (delegates to |
| 72 // arbitrator). |
| 73 void StartProviders(bool enable_high_accuracy); |
| 74 |
| 75 // Updates the providers on the geolocation thread, which must be running. |
| 76 void InformProvidersPermissionGranted(); |
| 77 |
| 78 // Notifies all registered clients that a position update is available. |
| 79 void NotifyClients(const Geoposition& position); |
| 80 |
| 81 // Thread |
| 82 void Init() override; |
| 83 void CleanUp() override; |
| 84 |
| 85 base::CallbackList<void(const Geoposition&)> high_accuracy_callbacks_; |
| 86 base::CallbackList<void(const Geoposition&)> low_accuracy_callbacks_; |
| 87 |
| 88 bool user_did_opt_into_location_services_; |
| 89 Geoposition position_; |
| 90 |
| 91 // True only in testing, where we want to use a custom position. |
| 92 bool ignore_location_updates_; |
| 93 |
| 94 // Only to be used on the geolocation thread. |
| 95 std::unique_ptr<LocationArbitrator> arbitrator_; |
| 96 |
| 97 DISALLOW_COPY_AND_ASSIGN(GeolocationProviderImpl); |
| 98 }; |
| 99 |
| 100 } // namespace content |
| 101 |
| 102 #endif // CONTENT_BROWSER_GEOLOCATION_GEOLOCATION_PROVIDER_IMPL_H_ |
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