1 // Copyright (c) 2013 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 // TODO(vadimt): Consider reusing WebKit/Blink types, if this is possible. 5 6 // Use the <code>chrome.location</code> API to retrieve the geographic location 7 // of the host machine. This API is a version of the <a 8 // href="http://dev.w3.org/geo/api/spec-source.html">HTML Geolocation API</a> 9 // that is compatible with event pages. 10 namespace location { 11 // Coordinates part of the Location object. 12 dictionary Coordinates { 13 // The geographic latitude specified in degrees. 14 double latitude; 15 16 // The geographic longitude specified in degrees. 17 double longitude; 18 19 // The height of the position, specified in meters above the [WGS84] 20 // ellipsoid, or null if Chrome cannot provide altitude information. 21 double? altitude; 22 23 // The accuracy of the latitude and longitude coordinates, in meters. This 24 // represents the radius of a circle around the given location. 25 double accuracy; 26 27 // The accuracy in meters of the 'altitude' attribute if it's not null, 28 // otherwise, null. 29 double? altitudeAccuracy; 30 31 // The direction of travel of the hosting device and is specified in 32 // degrees, where 0 <= heading < 360, counting clockwise relative to the 33 // true north. If the Chrome cannot provide heading information, the value 34 // of this attribute is null. If the hosting device is stationary (i.e. the 35 // value of the speed attribute is 0), then the value of the heading 36 // attribute is NaN. 37 double? heading; 38 39 // The magnitude of the horizontal component of the hosting device's current 40 // velocity and is specified in meters per second. If the Chrome cannot 41 // provide speed information, the value of this attribute is null. 42 double? speed; 43 }; 44 45 // Parameter of onLocationUpdate event's listener. 46 dictionary Location { 47 // Location watch request name. 48 DOMString name; 49 50 // Coordinates and their accuracy. 51 Coordinates coords; 52 53 // The time when the Location object was acquired in milliseconds since the 54 // start of the Unix Epoch. 55 double timestamp; 56 }; 57 58 // Parameter of watchLocation call. 59 dictionary WatchLocationRequestInfo { 60 // Minimum distance between location updates, in meters. Defaults to 0 - any 61 // change in location will be reported. 62 double? minDistanceInMeters; 63 64 // Minimum time interval between location updates, in milliseconds. Defaults 65 // to 0 - system-defined frequency of updates will be used. 66 double? minTimeInMilliseconds; 67 68 // Maximum age of a cached location, in milliseconds, that Chrome can pass 69 // to the first onLocationUpdate event for this location watch request. 70 // If this value <= 0, Chrome will always attempt to acquire a new location. 71 // Defaults to 0. 72 long? maximumAge; 73 }; 74 75 // TODO(vadimt): Consider adding getWatch() and getAllWatches(). 76 interface Functions { 77 // Starts a location watching request. 78 // |name| : Optional name to identify this request. Defaults to the empty 79 // string. 80 // |requestInfo| : Optional parameters for this request. 81 static void watchLocation(DOMString name, 82 WatchLocationRequestInfo requestInfo); 83 84 // Ends a location watching request. 85 // |name| : Optional name to identify the request to remove. Defaults to the 86 // empty string. 87 static void clearWatch(DOMString name); 88 }; 89 90 interface Events { 91 // Fired when a location change is detected. 92 // |location| : An object containing matching events and new location. 93 static void onLocationUpdate(Location location); 94 95 // Fired when detecting location in not possible. 96 // |error| : Human-readable error description. 97 static void onLocationError(DOMString error); 98 }; 99 }; 100
