| // 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 "device/geolocation/geolocation_provider_impl.h" |
| |
| #include <utility> |
| |
| #include "base/bind.h" |
| #include "base/bind_helpers.h" |
| #include "base/callback.h" |
| #include "base/lazy_instance.h" |
| #include "base/location.h" |
| #include "base/logging.h" |
| #include "base/memory/ptr_util.h" |
| #include "base/memory/singleton.h" |
| #include "base/single_thread_task_runner.h" |
| #include "base/threading/thread_task_runner_handle.h" |
| #include "device/geolocation/location_arbitrator.h" |
| #include "device/geolocation/public/cpp/geoposition.h" |
| |
| namespace device { |
| |
| namespace { |
| base::LazyInstance<CustomLocationProviderCallback>::Leaky |
| g_custom_location_provider_callback = LAZY_INSTANCE_INITIALIZER; |
| base::LazyInstance<GeolocationProvider::RequestContextProducer>::Leaky |
| g_request_context_producer = LAZY_INSTANCE_INITIALIZER; |
| base::LazyInstance<std::string>::Leaky g_api_key = LAZY_INSTANCE_INITIALIZER; |
| } // namespace |
| |
| // static |
| GeolocationProvider* GeolocationProvider::GetInstance() { |
| return GeolocationProviderImpl::GetInstance(); |
| } |
| |
| // static |
| void GeolocationProviderImpl::SetGeolocationGlobals( |
| const GeolocationProvider::RequestContextProducer request_context_producer, |
| const std::string& api_key, |
| const CustomLocationProviderCallback& callback) { |
| g_request_context_producer.Get() = request_context_producer; |
| g_api_key.Get() = api_key; |
| g_custom_location_provider_callback.Get() = callback; |
| } |
| |
| std::unique_ptr<GeolocationProvider::Subscription> |
| GeolocationProviderImpl::AddLocationUpdateCallback( |
| const LocationUpdateCallback& callback, |
| bool enable_high_accuracy) { |
| DCHECK(main_task_runner_->BelongsToCurrentThread()); |
| std::unique_ptr<GeolocationProvider::Subscription> subscription; |
| if (enable_high_accuracy) { |
| subscription = high_accuracy_callbacks_.Add(callback); |
| } else { |
| subscription = low_accuracy_callbacks_.Add(callback); |
| } |
| |
| OnClientsChanged(); |
| if (ValidateGeoposition(position_) || |
| position_.error_code != mojom::Geoposition::ErrorCode::NONE) { |
| callback.Run(position_); |
| } |
| |
| return subscription; |
| } |
| |
| bool GeolocationProviderImpl::HighAccuracyLocationInUse() { |
| return !high_accuracy_callbacks_.empty(); |
| } |
| |
| void GeolocationProviderImpl::OverrideLocationForTesting( |
| const mojom::Geoposition& position) { |
| DCHECK(main_task_runner_->BelongsToCurrentThread()); |
| ignore_location_updates_ = true; |
| NotifyClients(position); |
| } |
| |
| void GeolocationProviderImpl::OnLocationUpdate( |
| const LocationProvider* provider, |
| const mojom::Geoposition& position) { |
| DCHECK(OnGeolocationThread()); |
| // Will be true only in testing. |
| if (ignore_location_updates_) |
| return; |
| main_task_runner_->PostTask( |
| FROM_HERE, base::BindOnce(&GeolocationProviderImpl::NotifyClients, |
| base::Unretained(this), position)); |
| } |
| |
| // static |
| GeolocationProviderImpl* GeolocationProviderImpl::GetInstance() { |
| return base::Singleton<GeolocationProviderImpl>::get(); |
| } |
| |
| void GeolocationProviderImpl::BindGeolocationControlRequest( |
| mojom::GeolocationControlRequest request) { |
| // The |binding_| has been bound already here means that more than one |
| // GeolocationPermissionContext in chrome tried to bind to Device Service. |
| // We only bind the first request. See more info in geolocation_control.mojom. |
| if (!binding_.is_bound()) |
| binding_.Bind(std::move(request)); |
| } |
| |
| void GeolocationProviderImpl::UserDidOptIntoLocationServices() { |
| DCHECK(main_task_runner_->BelongsToCurrentThread()); |
| bool was_permission_granted = user_did_opt_into_location_services_; |
| user_did_opt_into_location_services_ = true; |
| if (IsRunning() && !was_permission_granted) |
| InformProvidersPermissionGranted(); |
| } |
| |
| GeolocationProviderImpl::GeolocationProviderImpl() |
| : base::Thread("Geolocation"), |
| user_did_opt_into_location_services_(false), |
| ignore_location_updates_(false), |
| main_task_runner_(base::ThreadTaskRunnerHandle::Get()), |
| binding_(this) { |
| DCHECK(main_task_runner_->BelongsToCurrentThread()); |
| high_accuracy_callbacks_.set_removal_callback(base::Bind( |
| &GeolocationProviderImpl::OnClientsChanged, base::Unretained(this))); |
| low_accuracy_callbacks_.set_removal_callback(base::Bind( |
| &GeolocationProviderImpl::OnClientsChanged, base::Unretained(this))); |
| } |
| |
| GeolocationProviderImpl::~GeolocationProviderImpl() { |
| Stop(); |
| DCHECK(!arbitrator_); |
| } |
| |
| void GeolocationProviderImpl::SetArbitratorForTesting( |
| std::unique_ptr<LocationProvider> arbitrator) { |
| arbitrator_ = std::move(arbitrator); |
| } |
| |
| bool GeolocationProviderImpl::OnGeolocationThread() const { |
| return task_runner()->BelongsToCurrentThread(); |
| } |
| |
| void GeolocationProviderImpl::OnClientsChanged() { |
| DCHECK(main_task_runner_->BelongsToCurrentThread()); |
| base::Closure task; |
| if (high_accuracy_callbacks_.empty() && low_accuracy_callbacks_.empty()) { |
| DCHECK(IsRunning()); |
| if (!ignore_location_updates_) { |
| // We have no more observers, so we clear the cached geoposition so that |
| // when the next observer is added we will not provide a stale position. |
| position_ = mojom::Geoposition(); |
| } |
| task = base::Bind(&GeolocationProviderImpl::StopProviders, |
| base::Unretained(this)); |
| } else { |
| if (!IsRunning()) { |
| Start(); |
| if (user_did_opt_into_location_services_) |
| InformProvidersPermissionGranted(); |
| } |
| // Determine a set of options that satisfies all clients. |
| bool enable_high_accuracy = !high_accuracy_callbacks_.empty(); |
| |
| // Send the current options to the providers as they may have changed. |
| task = base::Bind(&GeolocationProviderImpl::StartProviders, |
| base::Unretained(this), enable_high_accuracy); |
| } |
| |
| task_runner()->PostTask(FROM_HERE, task); |
| } |
| |
| void GeolocationProviderImpl::StopProviders() { |
| DCHECK(OnGeolocationThread()); |
| DCHECK(arbitrator_); |
| arbitrator_->StopProvider(); |
| } |
| |
| void GeolocationProviderImpl::StartProviders(bool enable_high_accuracy) { |
| DCHECK(OnGeolocationThread()); |
| DCHECK(arbitrator_); |
| arbitrator_->StartProvider(enable_high_accuracy); |
| } |
| |
| void GeolocationProviderImpl::InformProvidersPermissionGranted() { |
| DCHECK(IsRunning()); |
| if (!OnGeolocationThread()) { |
| task_runner()->PostTask( |
| FROM_HERE, |
| base::BindOnce( |
| &GeolocationProviderImpl::InformProvidersPermissionGranted, |
| base::Unretained(this))); |
| return; |
| } |
| DCHECK(OnGeolocationThread()); |
| DCHECK(arbitrator_); |
| arbitrator_->OnPermissionGranted(); |
| } |
| |
| void GeolocationProviderImpl::NotifyClients( |
| const mojom::Geoposition& position) { |
| DCHECK(main_task_runner_->BelongsToCurrentThread()); |
| DCHECK(ValidateGeoposition(position) || |
| position.error_code != mojom::Geoposition::ErrorCode::NONE); |
| position_ = position; |
| high_accuracy_callbacks_.Notify(position_); |
| low_accuracy_callbacks_.Notify(position_); |
| } |
| |
| void GeolocationProviderImpl::Init() { |
| DCHECK(OnGeolocationThread()); |
| |
| if (arbitrator_) |
| return; |
| |
| LocationProvider::LocationProviderUpdateCallback callback = base::Bind( |
| &GeolocationProviderImpl::OnLocationUpdate, base::Unretained(this)); |
| |
| arbitrator_ = std::make_unique<LocationArbitrator>( |
| g_custom_location_provider_callback.Get(), |
| g_request_context_producer.Get(), g_api_key.Get()); |
| arbitrator_->SetUpdateCallback(callback); |
| } |
| |
| void GeolocationProviderImpl::CleanUp() { |
| DCHECK(OnGeolocationThread()); |
| arbitrator_.reset(); |
| } |
| |
| } // namespace device |