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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.
// This file declares the Position structure, which is used to represent a
// position fix. Originally derived from
// http://gears.googlecode.com/svn/trunk/gears/geolocation/geolocation.h
#ifndef CHROME_COMMON_GEOPOSITION_H_
#define CHROME_COMMON_GEOPOSITION_H_
#pragma once
#include <string>
#include "base/time.h"
// The internal representation of a geo position. Some properties use different
// types when passed to JavaScript.
struct Geoposition {
public:
// Error codes for returning to JavaScript. These values are defined by the
// W3C spec. Note that Gears does not use all of these codes, but we need
// values for all of them to allow us to provide the constants on the error
// object.
enum ErrorCode {
ERROR_CODE_NONE = 0, // Chrome addition
ERROR_CODE_PERMISSION_DENIED = 1,
ERROR_CODE_POSITION_UNAVAILABLE = 2,
ERROR_CODE_TIMEOUT = 3,
};
Geoposition();
bool is_valid_latlong() const;
bool is_valid_altitude() const;
bool is_valid_accuracy() const;
bool is_valid_altitude_accuracy() const;
bool is_valid_heading() const;
bool is_valid_speed() const;
bool is_valid_timestamp() const;
// A valid fix has a valid latitude, longitude, accuracy and timestamp.
bool IsValidFix() const;
// A position is considered initialized if it has either a valid fix or
// an error code other than NONE.
bool IsInitialized() const;
// These properties correspond to the JavaScript Position object.
double latitude; // In degrees
double longitude; // In degrees
double altitude; // In metres
double accuracy; // In metres
double altitude_accuracy; // In metres
double heading; // In degrees clockwise relative to the true north
double speed; // In meters per second
// Timestamp for this position fix object taken from the host computer's
// system clock (i.e. from Time::Now(), not the source device's clock).
base::Time timestamp;
// These properties are returned to JavaScript as a PositionError object.
ErrorCode error_code;
std::string error_message; // Human-readable error message
};
#endif // CHROME_COMMON_GEOPOSITION_H_
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