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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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