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// Copyright 2008, Google Inc.
//
// Redistribution and use in source and binary forms, with or without
// modification, are permitted provided that the following conditions are met:
//
// 1. Redistributions of source code must retain the above copyright notice,
// this list of conditions and the following disclaimer.
// 2. Redistributions in binary form must reproduce the above copyright notice,
// this list of conditions and the following disclaimer in the documentation
// and/or other materials provided with the distribution.
// 3. Neither the name of Google Inc. nor the names of its contributors may be
// used to endorse or promote products derived from this software without
// specific prior written permission.
//
// THIS SOFTWARE IS PROVIDED BY THE AUTHOR ``AS IS'' AND ANY EXPRESS OR IMPLIED
// WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES OF
// MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO
// EVENT SHALL THE AUTHOR BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL,
// SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO,
// PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS;
// OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY,
// WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR
// OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF
// ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
#ifndef GEARS_GEOLOCATION_NETWORK_LOCATION_PROVIDER_H__
#define GEARS_GEOLOCATION_NETWORK_LOCATION_PROVIDER_H__
// TODO(joth): port to chromium
#if 0
#include "gears/base/common/common.h"
#include "gears/base/common/mutex.h"
#include "gears/base/common/string16.h"
#include "gears/base/common/thread.h"
#include "gears/geolocation/device_data_provider.h"
#include "gears/geolocation/location_provider.h"
#include "gears/geolocation/network_location_request.h"
// PositionCache is an implementation detail of NetworkLocationProvider.
class PositionCache;
class NetworkLocationProvider
: public LocationProviderBase,
public RadioDataProvider::ListenerInterface,
public WifiDataProvider::ListenerInterface,
public NetworkLocationRequest::ListenerInterface,
public Thread {
public:
NetworkLocationProvider(BrowsingContext *browsing_context,
const std::string16 &url,
const std::string16 &host_name,
const std::string16 &language);
virtual ~NetworkLocationProvider();
// Override LocationProviderBase implementation.
virtual void RegisterListener(
LocationProviderBase::ListenerInterface *listener,
bool request_address);
virtual void UnregisterListener(
LocationProviderBase::ListenerInterface *listener);
// LocationProviderBase implementation
virtual void GetPosition(Position *position);
private:
// DeviceDataProvider::ListenerInterface implementation.
virtual void DeviceDataUpdateAvailable(RadioDataProvider *provider);
virtual void DeviceDataUpdateAvailable(WifiDataProvider *provider);
// NetworkLocationRequest::ListenerInterface implementation.
virtual void LocationResponseAvailable(const Position &position,
bool server_error,
const std::string16 &access_token);
// Thread implementation
virtual void Run();
// Internal helper used by worker thread to make a network request
bool MakeRequest();
// Internal helper used by DeviceDataUpdateAvailable
void DeviceDataUpdateAvailableImpl();
// The network location request object and the url and host name it will use.
NetworkLocationRequest *request_;
std::string16 url_;
std::string16 host_name_;
// The device data providers
RadioDataProvider *radio_data_provider_;
WifiDataProvider *wifi_data_provider_;
// The radio and wifi data, flags to indicate if each data set is complete,
// and their guarding mutex.
RadioData radio_data_;
WifiData wifi_data_;
bool is_radio_data_complete_;
bool is_wifi_data_complete_;
Mutex data_mutex_;
// The timestamp for the latest device data update.
int64 timestamp_;
// Parameters for the network request
bool request_address_;
bool request_address_from_last_request_;
std::string16 address_language_;
// The current best position estimate and its guarding mutex
Position position_;
Mutex position_mutex_;
// The event used to notify this object's (ie the network location provider)
// worker thread about changes in available data, the network request status
// and whether we're shutting down. The booleans are used to indicate what the
// event signals.
Event thread_notification_event_;
bool is_shutting_down_;
bool is_new_data_available_;
bool is_last_request_complete_;
bool is_new_listener_waiting_;
// When the last request did not request an address, this stores any new
// listeners which have been added and require an address to be requested.
typedef std::set<LocationProviderBase::ListenerInterface*> ListenerSet;
ListenerSet new_listeners_requiring_address_;
Mutex new_listeners_requiring_address_mutex_;
// The earliest timestamp at which the next request can be made, in
// milliseconds.
int64 earliest_next_request_time_;
BrowsingContext *browsing_context_;
// The cache of positions.
scoped_ptr<PositionCache> position_cache_;
DISALLOW_EVIL_CONSTRUCTORS(NetworkLocationProvider);
};
#endif // if 0
#endif // GEARS_GEOLOCATION_NETWORK_LOCATION_PROVIDER_H__
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