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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 "chrome/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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