1 // Copyright (c) 2012 The Chromium Authors. All rights reserved. 2 // Use of this source code is governed by a BSD-style license that can be 3 // found in the LICENSE file. 4 5 // This file declares the Geoposition structure, used to represent a position 6 // fix. It was originally derived from: 7 // http://gears.googlecode.com/svn/trunk/gears/geolocation/geolocation.h 8 9 #ifndef CONTENT_PUBLIC_COMMON_GEOPOSITION_H_ 10 #define CONTENT_PUBLIC_COMMON_GEOPOSITION_H_ 11 12 #include <string> 13 14 #include "base/time/time.h" 15 #include "content/common/content_export.h" 16 17 namespace content { 18 19 struct CONTENT_EXPORT Geoposition { 20 public: 21 // These values follow the W3C geolocation specification and can be returned 22 // to JavaScript without the need for a conversion. 23 enum ErrorCode { 24 ERROR_CODE_NONE = 0, // Chrome addition. 25 ERROR_CODE_PERMISSION_DENIED = 1, 26 ERROR_CODE_POSITION_UNAVAILABLE = 2, 27 ERROR_CODE_TIMEOUT = 3, 28 }; 29 30 // All fields are initialized to sentinel values marking them as invalid. The 31 // error code is set to ERROR_CODE_NONE. 32 Geoposition(); 33 34 // A valid fix has a valid latitude, longitude, accuracy and timestamp. 35 bool Validate() const; 36 37 // These properties correspond to those of the JavaScript Position object 38 // although their types may differ. 39 // Latitude in decimal degrees north (WGS84 coordinate frame). 40 double latitude; 41 // Longitude in decimal degrees west (WGS84 coordinate frame). 42 double longitude; 43 // Altitude in meters (above WGS84 datum). 44 double altitude; 45 // Accuracy of horizontal position in meters. 46 double accuracy; 47 // Accuracy of altitude in meters. 48 double altitude_accuracy; 49 // Heading in decimal degrees clockwise from true north. 50 double heading; 51 // Horizontal component of device velocity in meters per second. 52 double speed; 53 // Time of position measurement in milisecons since Epoch in UTC time. This is 54 // taken from the host computer's system clock (i.e. from Time::Now(), not the 55 // source device's clock). 56 base::Time timestamp; 57 58 // Error code, see enum above. 59 ErrorCode error_code; 60 // Human-readable error message. 61 std::string error_message; 62 }; 63 64 } // namespace content 65 66 #endif // CONTENT_COMMON_GEOPOSITION_H_ 67
