blob: 058933ca9724e7bcc5cae6696317c05983683677 [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 "services/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 "base/time/default_tick_clock.h"
#include "net/base/network_change_notifier.h"
#include "services/device/geolocation/location_arbitrator.h"
#include "services/device/geolocation/position_cache_impl.h"
#include "services/device/public/cpp/geolocation/geoposition.h"
#include "services/network/public/cpp/shared_url_loader_factory.h"
#if defined(OS_ANDROID)
#include "base/android/jni_android.h"
#include "jni/LocationProviderFactory_jni.h"
#endif
namespace device {
namespace {
base::LazyInstance<CustomLocationProviderCallback>::Leaky
g_custom_location_provider_callback = LAZY_INSTANCE_INITIALIZER;
base::LazyInstance<std::unique_ptr<network::SharedURLLoaderFactoryInfo>>::Leaky
g_url_loader_factory_info = 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::SetGeolocationConfiguration(
scoped_refptr<network::SharedURLLoaderFactory> url_loader_factory,
const std::string& api_key,
const CustomLocationProviderCallback& custom_location_provider_getter,
bool use_gms_core_location_provider) {
if (url_loader_factory)
g_url_loader_factory_info.Get() = url_loader_factory->Clone();
g_api_key.Get() = api_key;
g_custom_location_provider_callback.Get() = custom_location_provider_getter;
if (use_gms_core_location_provider) {
#if defined(OS_ANDROID)
JNIEnv* env = base::android::AttachCurrentThread();
Java_LocationProviderFactory_useGmsCoreLocationProvider(env);
#else
NOTREACHED() << "GMS core location provider is only available for Android";
#endif
}
}
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));
scoped_refptr<network::SharedURLLoaderFactory> url_loader_factory;
if (g_url_loader_factory_info.Get()) {
url_loader_factory = network::SharedURLLoaderFactory::Create(
std::move(g_url_loader_factory_info.Get()));
}
DCHECK(net::NetworkChangeNotifier::HasNetworkChangeNotifier())
<< "PositionCacheImpl needs a global NetworkChangeNotifier";
arbitrator_ = std::make_unique<LocationArbitrator>(
g_custom_location_provider_callback.Get(), std::move(url_loader_factory),
g_api_key.Get(),
std::make_unique<PositionCacheImpl>(
base::DefaultTickClock::GetInstance()));
arbitrator_->SetUpdateCallback(callback);
}
void GeolocationProviderImpl::CleanUp() {
DCHECK(OnGeolocationThread());
arbitrator_.reset();
}
} // namespace device