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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 DEVICE_GEOLOCATION_GEOPOSITION_H_ | |
10 #define DEVICE_GEOLOCATION_GEOPOSITION_H_ | |
11 | |
12 #include <string> | |
13 | |
14 #include "base/time/time.h" | |
15 #include "device/geolocation/geolocation_export.h" | |
16 | |
17 namespace device { | |
18 | |
19 struct DEVICE_GEOLOCATION_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 ERROR_CODE_LAST = ERROR_CODE_TIMEOUT | |
29 }; | |
30 | |
31 // All fields are initialized to sentinel values marking them as invalid. The | |
32 // error code is set to ERROR_CODE_NONE. | |
33 Geoposition(); | |
34 | |
35 Geoposition(const Geoposition& other); | |
36 | |
37 // A valid fix has a valid latitude, longitude, accuracy and timestamp. | |
38 bool Validate() const; | |
39 | |
40 // These properties correspond to those of the JavaScript Position object | |
41 // although their types may differ. | |
42 // Latitude in decimal degrees north (WGS84 coordinate frame). | |
43 double latitude; | |
44 // Longitude in decimal degrees west (WGS84 coordinate frame). | |
45 double longitude; | |
46 // Altitude in meters (above WGS84 datum). | |
47 double altitude; | |
48 // Accuracy of horizontal position in meters. | |
49 double accuracy; | |
50 // Accuracy of altitude in meters. | |
51 double altitude_accuracy; | |
52 // Heading in decimal degrees clockwise from true north. | |
53 double heading; | |
54 // Horizontal component of device velocity in meters per second. | |
55 double speed; | |
56 // Time of position measurement in milisecons since Epoch in UTC time. This is | |
57 // taken from the host computer's system clock (i.e. from Time::Now(), not the | |
58 // source device's clock). | |
59 base::Time timestamp; | |
60 | |
61 // Error code, see enum above. | |
62 ErrorCode error_code; | |
63 // Human-readable error message. | |
64 std::string error_message; | |
65 }; | |
66 | |
67 } // namespace device | |
68 | |
69 #endif // DEVICE_GEOLOCATION_GEOPOSITION_H_ | |
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