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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 DEVICE_GEOLOCATION_GEOLOCATION_PROVIDER_IMPL_H_ | |
6 #define DEVICE_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 "device/geolocation/geolocation_export.h" | |
17 #include "device/geolocation/geolocation_provider.h" | |
18 #include "device/geolocation/geoposition.h" | |
19 | |
20 namespace base { | |
21 template<typename Type> struct DefaultSingletonTraits; | |
22 class SingleThreadTaskRunner; | |
23 } | |
24 | |
25 namespace device { | |
26 class LocationArbitrator; | |
27 | |
28 class DEVICE_GEOLOCATION_EXPORT GeolocationProviderImpl | |
29 : public NON_EXPORTED_BASE(GeolocationProvider), | |
30 public base::Thread { | |
31 public: | |
32 // GeolocationProvider implementation: | |
33 std::unique_ptr<GeolocationProvider::Subscription> AddLocationUpdateCallback( | |
34 const LocationUpdateCallback& callback, | |
35 bool enable_high_accuracy) override; | |
36 void UserDidOptIntoLocationServices() override; | |
37 void OverrideLocationForTesting(const Geoposition& position) override; | |
38 | |
39 // Callback from the LocationArbitrator. Public for testing. | |
40 void OnLocationUpdate(const Geoposition& position); | |
41 | |
42 // Gets a pointer to the singleton instance of the location relayer, which | |
43 // is in turn bound to the browser's global context objects. This must only be | |
44 // called on the UI thread so that the GeolocationProviderImpl is always | |
45 // instantiated on the same thread. Ownership is NOT returned. | |
46 static GeolocationProviderImpl* GetInstance(); | |
47 | |
48 bool user_did_opt_into_location_services_for_testing() { | |
49 return user_did_opt_into_location_services_; | |
50 } | |
51 | |
52 protected: | |
53 friend struct base::DefaultSingletonTraits<GeolocationProviderImpl>; | |
54 GeolocationProviderImpl(); | |
55 ~GeolocationProviderImpl() override; | |
56 | |
57 // Useful for injecting mock geolocation arbitrator in tests. | |
58 // TODO(mvanouwerkerk): Use something like SetArbitratorForTesting instead. | |
59 virtual std::unique_ptr<LocationArbitrator> CreateArbitrator(); | |
60 | |
61 private: | |
62 bool OnGeolocationThread() const; | |
63 | |
64 // Start and stop providers as needed when clients are added or removed. | |
65 void OnClientsChanged(); | |
66 | |
67 // Stops the providers when there are no more registered clients. Note that | |
68 // once the Geolocation thread is started, it will stay alive (but sitting | |
69 // idle without any pending messages). | |
70 void StopProviders(); | |
71 | |
72 // Starts the geolocation providers or updates their options (delegates to | |
73 // arbitrator). | |
74 void StartProviders(bool enable_high_accuracy); | |
75 | |
76 // Updates the providers on the geolocation thread, which must be running. | |
77 void InformProvidersPermissionGranted(); | |
78 | |
79 // Notifies all registered clients that a position update is available. | |
80 void NotifyClients(const Geoposition& position); | |
81 | |
82 // Thread | |
83 void Init() override; | |
84 void CleanUp() override; | |
85 | |
86 base::CallbackList<void(const Geoposition&)> high_accuracy_callbacks_; | |
87 base::CallbackList<void(const Geoposition&)> low_accuracy_callbacks_; | |
88 | |
89 bool user_did_opt_into_location_services_; | |
90 Geoposition position_; | |
91 | |
92 // True only in testing, where we want to use a custom position. | |
93 bool ignore_location_updates_; | |
94 | |
95 // Only to be used on the geolocation thread. | |
96 std::unique_ptr<LocationArbitrator> arbitrator_; | |
97 | |
98 // Used to PostTask()s from the geolocation thread to creation thread. | |
99 const scoped_refptr<base::SingleThreadTaskRunner> main_task_runner_; | |
100 | |
101 DISALLOW_COPY_AND_ASSIGN(GeolocationProviderImpl); | |
102 }; | |
103 | |
104 } // namespace device | |
105 | |
106 #endif // DEVICE_GEOLOCATION_GEOLOCATION_PROVIDER_IMPL_H_ | |
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