root/content/public/common/geoposition.cc

DEFINITIONS

1. error_code
2. Validate

// Copyright (c) 2012 The Chromium Authors. All rights reserved.
// Use of this source code is governed by a BSD-style license that can be
// found in the LICENSE file.

#include "content/public/common/geoposition.h"

namespace {
// Sentinel values to mark invalid data. (WebKit carries companion is_valid
// bools for this purpose; we may eventually follow that approach, but
// sentinels worked OK in the Gears code this is based on.)
const double kBadLatitudeLongitude = 200;
// Lowest point on land is at approximately -400 meters.
const int kBadAltitude = -10000;
const int kBadAccuracy = -1;  // Accuracy must be non-negative.
const int kBadHeading = -1;  // Heading must be non-negative.
const int kBadSpeed = -1;
}

namespace content {

Geoposition::Geoposition()
    : latitude(kBadLatitudeLongitude),
      longitude(kBadLatitudeLongitude),
      altitude(kBadAltitude),
      accuracy(kBadAccuracy),
      altitude_accuracy(kBadAccuracy),
      heading(kBadHeading),
      speed(kBadSpeed),
      error_code(ERROR_CODE_NONE) {
}

bool Geoposition::Validate() const {
  return latitude >= -90. && latitude <= 90. &&
         longitude >= -180. && longitude <= 180. &&
         accuracy >= 0. &&
         !timestamp.is_null();
}

}  // namespace content