blob: b08f3af5e59290d91eab8a565fa2d9f48e362d89 [file] [log] [blame]
// 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.
#include <list>
#include <memory>
#include <vector>
#include "base/callback_forward.h"
#include "base/compiler_specific.h"
#include "base/macros.h"
#include "base/threading/thread.h"
#include "device/geolocation/geolocation_export.h"
#include "device/geolocation/geolocation_provider.h"
#include "device/geolocation/geoposition.h"
#include "device/geolocation/location_provider.h"
namespace base {
template <typename Type>
struct DefaultSingletonTraits;
class SingleThreadTaskRunner;
namespace device {
class DEVICE_GEOLOCATION_EXPORT GeolocationProviderImpl
: public NON_EXPORTED_BASE(GeolocationProvider),
public base::Thread {
// GeolocationProvider implementation:
std::unique_ptr<GeolocationProvider::Subscription> AddLocationUpdateCallback(
const LocationUpdateCallback& callback,
bool enable_high_accuracy) override;
void UserDidOptIntoLocationServices() override;
void OverrideLocationForTesting(const Geoposition& position) override;
// Callback from the LocationArbitrator. Public for testing.
void OnLocationUpdate(const LocationProvider* provider,
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_;
// Safe to call while there are no GeolocationProviderImpl clients
// registered.
void SetArbitratorForTesting(std::unique_ptr<LocationProvider> arbitrator);
friend struct base::DefaultSingletonTraits<GeolocationProviderImpl>;
~GeolocationProviderImpl() override;
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 enable_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_;
// Used to PostTask()s from the geolocation thread to caller thread.
const scoped_refptr<base::SingleThreadTaskRunner> main_task_runner_;
// Only to be used on the geolocation thread.
std::unique_ptr<LocationProvider> arbitrator_;
} // namespace device