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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 #include "content/public/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 int kBadHeading = -1;  // Heading must be non-negative.
     16 const int kBadSpeed = -1;
     17 }
     18 
     19 namespace content {
     20 
     21 Geoposition::Geoposition()
     22     : latitude(kBadLatitudeLongitude),
     23       longitude(kBadLatitudeLongitude),
     24       altitude(kBadAltitude),
     25       accuracy(kBadAccuracy),
     26       altitude_accuracy(kBadAccuracy),
     27       heading(kBadHeading),
     28       speed(kBadSpeed),
     29       error_code(ERROR_CODE_NONE) {
     30 }
     31 
     32 bool Geoposition::Validate() const {
     33   return latitude >= -90. && latitude <= 90. &&
     34          longitude >= -180. && longitude <= 180. &&
     35          accuracy >= 0. &&
     36          !timestamp.is_null();
     37 }
     38 
     39 }  // namespace content
     40