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// Copyright (c) 2012 The Chromium Authors. All rights reserved.
// Use of this source code is governed by a BSD-style license that can be
// found in the LICENSE file.
#ifndef CONTENT_BROWSER_GEOLOCATION_GEOLOCATION_PROVIDER_IMPL_H_
#define CONTENT_BROWSER_GEOLOCATION_GEOLOCATION_PROVIDER_IMPL_H_
#include <list>
#include <vector>
#include "base/basictypes.h"
#include "base/callback_forward.h"
#include "base/compiler_specific.h"
#include "base/threading/thread.h"
#include "content/common/content_export.h"
#include "content/public/browser/geolocation_provider.h"
#include "content/public/common/geoposition.h"
template<typename Type> struct DefaultSingletonTraits;
namespace content {
class LocationArbitrator;
class CONTENT_EXPORT GeolocationProviderImpl
: public NON_EXPORTED_BASE(GeolocationProvider),
public base::Thread {
public:
// GeolocationProvider implementation:
scoped_ptr<GeolocationProvider::Subscription> AddLocationUpdateCallback(
const LocationUpdateCallback& callback,
bool use_high_accuracy) override;
void UserDidOptIntoLocationServices() override;
void OverrideLocationForTesting(const Geoposition& position) override;
// Callback from the LocationArbitrator. Public for testing.
void OnLocationUpdate(const Geoposition& position);
// Gets a pointer to the singleton instance of the location relayer, which
// is in turn bound to the browser's global context objects. This must only be
// called on the UI thread so that the GeolocationProviderImpl is always
// instantiated on the same thread. Ownership is NOT returned.
static GeolocationProviderImpl* GetInstance();
bool user_did_opt_into_location_services_for_testing() {
return user_did_opt_into_location_services_;
}
protected:
friend struct DefaultSingletonTraits<GeolocationProviderImpl>;
GeolocationProviderImpl();
~GeolocationProviderImpl() override;
// Useful for injecting mock geolocation arbitrator in tests.
virtual LocationArbitrator* CreateArbitrator();
private:
bool OnGeolocationThread() const;
// Start and stop providers as needed when clients are added or removed.
void OnClientsChanged();
// Stops the providers when there are no more registered clients. Note that
// once the Geolocation thread is started, it will stay alive (but sitting
// idle without any pending messages).
void StopProviders();
// Starts the geolocation providers or updates their options (delegates to
// arbitrator).
void StartProviders(bool use_high_accuracy);
// Updates the providers on the geolocation thread, which must be running.
void InformProvidersPermissionGranted();
// Notifies all registered clients that a position update is available.
void NotifyClients(const Geoposition& position);
// Thread
void Init() override;
void CleanUp() override;
base::CallbackList<void(const Geoposition&)> high_accuracy_callbacks_;
base::CallbackList<void(const Geoposition&)> low_accuracy_callbacks_;
bool user_did_opt_into_location_services_;
Geoposition position_;
// True only in testing, where we want to use a custom position.
bool ignore_location_updates_;
// Only to be used on the geolocation thread.
LocationArbitrator* arbitrator_;
DISALLOW_COPY_AND_ASSIGN(GeolocationProviderImpl);
};
} // namespace content
#endif // CONTENT_BROWSER_GEOLOCATION_GEOLOCATION_PROVIDER_IMPL_H_
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