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// Copyright (c) 2010 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 "chrome/browser/geolocation/location_arbitrator.h"
#include <map>
#include "base/logging.h"
#include "base/non_thread_safe.h"
#include "base/ref_counted.h"
#include "base/scoped_ptr.h"
#include "base/string_util.h"
#include "chrome/browser/net/url_request_context_getter.h"
#include "chrome/browser/geolocation/access_token_store.h"
#include "chrome/browser/geolocation/geoposition.h"
#include "chrome/browser/geolocation/location_provider.h"
#include "googleurl/src/gurl.h"
namespace {
const char* kDefaultNetworkProviderUrl = "https://www.google.com/loc/json";
class GeolocationArbitratorImpl
: public GeolocationArbitrator,
public LocationProviderBase::ListenerInterface,
public NonThreadSafe {
public:
GeolocationArbitratorImpl(AccessTokenStore* access_token_store,
URLRequestContextGetter* context_getter);
~GeolocationArbitratorImpl();
// GeolocationArbitrator
virtual void AddObserver(Delegate* delegate,
const UpdateOptions& update_options);
virtual void RemoveObserver(Delegate* delegate);
virtual void SetUseMockProvider(bool use_mock);
// ListenerInterface
virtual void LocationUpdateAvailable(LocationProviderBase* provider);
virtual void MovementDetected(LocationProviderBase* provider);
private:
void CreateProviders();
bool HasHighAccuracyObserver();
scoped_refptr<AccessTokenStore> access_token_store_;
scoped_refptr<URLRequestContextGetter> context_getter_;
const GURL default_url_;
scoped_ptr<LocationProviderBase> provider_;
typedef std::map<Delegate*, UpdateOptions> DelegateMap;
DelegateMap observers_;
bool use_mock_;
};
} // namespace
GeolocationArbitrator* GeolocationArbitrator::New(
AccessTokenStore* access_token_store,
URLRequestContextGetter* context_getter) {
return new GeolocationArbitratorImpl(access_token_store, context_getter);
}
GeolocationArbitrator::~GeolocationArbitrator() {
}
GeolocationArbitratorImpl::GeolocationArbitratorImpl(
AccessTokenStore* access_token_store,
URLRequestContextGetter* context_getter)
: access_token_store_(access_token_store), context_getter_(context_getter),
default_url_(kDefaultNetworkProviderUrl), use_mock_(false) {
DCHECK(default_url_.is_valid());
}
GeolocationArbitratorImpl::~GeolocationArbitratorImpl() {
DCHECK(CalledOnValidThread());
}
void GeolocationArbitratorImpl::AddObserver(
Delegate* delegate, const UpdateOptions& update_options) {
DCHECK(CalledOnValidThread());
observers_[delegate] = update_options;
CreateProviders();
}
void GeolocationArbitratorImpl::RemoveObserver(Delegate* delegate) {
DCHECK(CalledOnValidThread());
observers_.erase(delegate);
if (observers_.empty()) {
// TODO(joth): Delayed callback to linger before destroying the provider.
provider_.reset();
}
}
void GeolocationArbitratorImpl::SetUseMockProvider(bool use_mock) {
DCHECK(CalledOnValidThread());
DCHECK(provider_ == NULL);
use_mock_ = use_mock;
}
void GeolocationArbitratorImpl::LocationUpdateAvailable(
LocationProviderBase* provider) {
DCHECK(CalledOnValidThread());
DCHECK(provider);
Position position;
provider->GetPosition(&position);
// TODO(joth): Arbitrate.
for (DelegateMap::const_iterator it = observers_.begin();
it != observers_.end(); ++it) {
it->first->OnLocationUpdate(position);
}
}
void GeolocationArbitratorImpl::MovementDetected(
LocationProviderBase* provider) {
DCHECK(CalledOnValidThread());
}
void GeolocationArbitratorImpl::CreateProviders() {
DCHECK(CalledOnValidThread());
DCHECK(!observers_.empty());
if (provider_ == NULL) {
// TODO(joth): Check with GLS folks what hostname they'd like sent.
provider_.reset(NewNetworkLocationProvider(access_token_store_.get(),
context_getter_.get(), default_url_, ASCIIToUTF16("chromium.org")));
}
// TODO(joth): Use high-accuracy to create conditionally create GPS provider.
}
bool GeolocationArbitratorImpl::HasHighAccuracyObserver() {
DCHECK(CalledOnValidThread());
for (DelegateMap::const_iterator it = observers_.begin();
it != observers_.end(); ++it) {
if (it->second.use_high_accuracy)
return true;
}
return false;
}
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