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// Copyright 2017 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.
module device.mojom;
import "mojo/public/mojom/base/time.mojom";
// 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 double kBadAltitude = -10000;
const double kBadAccuracy = -1; // Accuracy must be non-negative.
const double kBadHeading = -1; // Heading must be non-negative.
const double kBadSpeed = -1;
// A Geoposition represents a position fix. It was originally derived from:
struct Geoposition {
// These values follow the W3C geolocation specification and can be returned
// to JavaScript without the need for a conversion.
enum ErrorCode {
NONE = 0, // Chrome addition.
// Whether this geoposition is valid.
bool valid;
// These properties correspond to those of the JavaScript Position object
// although their types may differ.
// Latitude in decimal degrees north (WGS84 coordinate frame).
double latitude = kBadLatitudeLongitude;
// Longitude in decimal degrees west (WGS84 coordinate frame).
double longitude = kBadLatitudeLongitude;
// Altitude in meters (above WGS84 datum).
double altitude = kBadAltitude;
// Accuracy of horizontal position in meters.
double accuracy = kBadAccuracy;
// Accuracy of altitude in meters.
double altitude_accuracy = kBadAccuracy;
// Heading in decimal degrees clockwise from true north.
double heading = kBadHeading;
// Horizontal component of device velocity in meters per second.
double speed = kBadSpeed;
// Time of position measurement in seconds since the Windows FILETIME epoch
// (1601-01-01 00:00:00 UTC). This is taken from the host computer's system
// clock (i.e. from Time::Now(), not the source device's clock).
mojo_base.mojom.Time timestamp;
// Error code, see enum above.
ErrorCode error_code = NONE;
// Human-readable error message.
string error_message;