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1 // Copyright (c) 2010 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 #include "content/common/geoposition.h" | |
6 | |
7 namespace { | |
8 // Sentinel values to mark invalid data. (WebKit carries companion is_valid | |
9 // bools for this purpose; we may eventually follow that approach, but | |
10 // sentinels worked OK in the Gears code this is based on.) | |
11 const double kBadLatitudeLongitude = 200; | |
12 // Lowest point on land is at approximately -400 meters. | |
13 const int kBadAltitude = -10000; | |
14 const int kBadAccuracy = -1; // Accuracy must be non-negative. | |
15 const int64 kBadTimestamp = kint64min; | |
16 const int kBadHeading = -1; // Heading must be non-negative. | |
17 const int kBadSpeed = -1; | |
18 } | |
19 | |
20 Geoposition::Geoposition() | |
21 : latitude(kBadLatitudeLongitude), | |
22 longitude(kBadLatitudeLongitude), | |
23 altitude(kBadAltitude), | |
24 accuracy(kBadAccuracy), | |
25 altitude_accuracy(kBadAccuracy), | |
26 heading(kBadHeading), | |
27 speed(kBadSpeed), | |
28 error_code(ERROR_CODE_NONE) { | |
29 } | |
30 | |
31 bool Geoposition::is_valid_latlong() const { | |
32 return latitude >= -90.0 && latitude <= 90.0 && | |
33 longitude >= -180.0 && longitude <= 180.0; | |
34 } | |
35 | |
36 bool Geoposition::is_valid_altitude() const { | |
37 return altitude > kBadAltitude; | |
38 } | |
39 | |
40 bool Geoposition::is_valid_accuracy() const { | |
41 return accuracy >= 0.0; | |
42 } | |
43 | |
44 bool Geoposition::is_valid_altitude_accuracy() const { | |
45 return altitude_accuracy >= 0.0; | |
46 } | |
47 | |
48 bool Geoposition::is_valid_heading() const { | |
49 return heading >= 0 && heading <= 360; | |
50 } | |
51 | |
52 bool Geoposition::is_valid_speed() const { | |
53 return speed >= 0; | |
54 } | |
55 | |
56 bool Geoposition::is_valid_timestamp() const { | |
57 return !timestamp.is_null(); | |
58 } | |
59 | |
60 bool Geoposition::IsValidFix() const { | |
61 return is_valid_latlong() && is_valid_accuracy() && is_valid_timestamp(); | |
62 } | |
63 | |
64 bool Geoposition::IsInitialized() const { | |
65 return error_code != ERROR_CODE_NONE || IsValidFix(); | |
66 } | |
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