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.
5 #ifndef CONTENT_BROWSER_GEOLOCATION_GEOLOCATION_PROVIDER_IMPL_H_
6 #define CONTENT_BROWSER_GEOLOCATION_GEOLOCATION_PROVIDER_IMPL_H_
11 #include "base/basictypes.h"
12 #include "base/callback_forward.h"
13 #include "base/compiler_specific.h"
14 #include "base/threading/thread.h"
15 #include "content/common/content_export.h"
16 #include "content/public/browser/geolocation_provider.h"
17 #include "content/public/common/geoposition.h"
19 template<typename Type
> struct DefaultSingletonTraits
;
22 class LocationArbitrator
;
24 class CONTENT_EXPORT GeolocationProviderImpl
25 : public NON_EXPORTED_BASE(GeolocationProvider
),
28 // GeolocationProvider implementation:
29 virtual scoped_ptr
<GeolocationProvider::Subscription
>
30 AddLocationUpdateCallback(const LocationUpdateCallback
& callback
,
31 bool use_high_accuracy
) OVERRIDE
;
32 virtual void UserDidOptIntoLocationServices() OVERRIDE
;
33 virtual void OverrideLocationForTesting(const Geoposition
& position
) OVERRIDE
;
35 // Callback from the LocationArbitrator. Public for testing.
36 void OnLocationUpdate(const Geoposition
& position
);
38 // Gets a pointer to the singleton instance of the location relayer, which
39 // is in turn bound to the browser's global context objects. This must only be
40 // called on the UI thread so that the GeolocationProviderImpl is always
41 // instantiated on the same thread. Ownership is NOT returned.
42 static GeolocationProviderImpl
* GetInstance();
44 bool user_did_opt_into_location_services_for_testing() {
45 return user_did_opt_into_location_services_
;
49 friend struct DefaultSingletonTraits
<GeolocationProviderImpl
>;
50 GeolocationProviderImpl();
51 virtual ~GeolocationProviderImpl();
53 // Useful for injecting mock geolocation arbitrator in tests.
54 virtual LocationArbitrator
* CreateArbitrator();
57 bool OnGeolocationThread() const;
59 // Start and stop providers as needed when clients are added or removed.
60 void OnClientsChanged();
62 // Stops the providers when there are no more registered clients. Note that
63 // once the Geolocation thread is started, it will stay alive (but sitting
64 // idle without any pending messages).
67 // Starts the geolocation providers or updates their options (delegates to
69 void StartProviders(bool use_high_accuracy
);
71 // Updates the providers on the geolocation thread, which must be running.
72 void InformProvidersPermissionGranted();
74 // Notifies all registered clients that a position update is available.
75 void NotifyClients(const Geoposition
& position
);
78 virtual void Init() OVERRIDE
;
79 virtual void CleanUp() OVERRIDE
;
81 base::CallbackList
<void(const Geoposition
&)> high_accuracy_callbacks_
;
82 base::CallbackList
<void(const Geoposition
&)> low_accuracy_callbacks_
;
84 bool user_did_opt_into_location_services_
;
85 Geoposition position_
;
87 // True only in testing, where we want to use a custom position.
88 bool ignore_location_updates_
;
90 // Only to be used on the geolocation thread.
91 LocationArbitrator
* arbitrator_
;
93 DISALLOW_COPY_AND_ASSIGN(GeolocationProviderImpl
);
96 } // namespace content
98 #endif // CONTENT_BROWSER_GEOLOCATION_GEOLOCATION_PROVIDER_IMPL_H_