/* This Source Code Form is subject to the terms of the Mozilla Public * License, v. 2.0. If a copy of the MPL was not distributed with this * file, You can obtain one at http://mozilla.org/MPL/2.0/. */ Components.utils.import("resource://gre/modules/XPCOMUtils.jsm"); const Ci = Components.interfaces; const Cc = Components.classes; var gLoggingEnabled = false; function LOG(aMsg) { if (gLoggingEnabled) { aMsg = ("*** GPSD GEO: " + aMsg); Cc["@mozilla.org/consoleservice;1"].getService(Ci.nsIConsoleService).logStringMessage(aMsg); dump(aMsg); } } function GeoPositionCoordsObject(latitude, longitude, altitude, accuracy, altitudeAccuracy, heading, speed) { this.latitude = latitude; this.longitude = longitude; this.altitude = altitude; this.accuracy = accuracy; this.altitudeAccuracy = altitudeAccuracy; this.heading = heading; this.speed = speed; }; GeoPositionCoordsObject.prototype = { QueryInterface: XPCOMUtils.generateQI([Ci.nsIDOMGeoPositionCoords]), // Class Info is required to be able to pass objects back into the DOM. classInfo: XPCOMUtils.generateCI({interfaces: [Ci.nsIDOMGeoPositionCoords], flags: Ci.nsIClassInfo.DOM_OBJECT, classDescription: "Geoposition Coordinate Object"}), latitude: null, longitude: null, altitude: null, accuracy: null, altitudeAccuracy: null, heading: null, speed: null, }; function GeoPositionObject(latitude, longitude, altitude, accuracy, altitudeAccuracy, heading, speed, timestamp) { this.coords = new GeoPositionCoordsObject(latitude, longitude, altitude, accuracy, altitudeAccuracy, heading, speed); this.timestamp = timestamp; }; GeoPositionObject.prototype = { QueryInterface: XPCOMUtils.generateQI([Ci.nsIDOMGeoPosition]), // Class Info is required to be able to pass objects back into the DOM. classInfo: XPCOMUtils.generateCI({interfaces: [Ci.nsIDOMGeoPosition], flags: Ci.nsIClassInfo.DOM_OBJECT, classDescription: "Geoposition Object"}), coords: null, timestamp: null, }; function GPSDProvider() { this.prefService = Cc["@mozilla.org/preferences-service;1"].getService(Ci.nsIPrefBranch).QueryInterface(Ci.nsIPrefService); try { gLoggingEnabled = this.prefService.getBoolPref("geo.gpsd.logging.enabled"); } catch (e) {} }; GPSDProvider.prototype = { QueryInterface: XPCOMUtils.generateQI([Ci.nsIGeolocationProvider]), classID: Components.ID("{0A3BE523-0F2A-32CC-CCD8-1E5986D5A79D}"), prefService: null, transport: null, outputStream: null, inputStream: null, startup: function() { LOG("startup called\n"); var socketTransportService = Cc["@mozilla.org/network/socket-transport-service;1"].getService(Ci.nsISocketTransportService); var hostIPAddr = "127.0.0.1"; var hostPort = "2947"; try { hostIPAddr = this.prefService.getCharPref("geo.gpsd.host.ipaddr"); } catch (e) {} try { hostPort = this.prefService.getCharPref("geo.gpsd.host.port"); } catch (e) {} LOG("Host info: " + hostIPAddr + ":" + hostPort + "\n"); this.transport = socketTransportService.createTransport(null, 0, hostIPAddr, hostPort, null); // Alright to open streams here as they are non-blocking by default this.outputStream = this.transport.openOutputStream(0,0,0); this.inputStream = this.transport.openInputStream(0,0,0); }, shutdown: function() { LOG("shutdown called\n"); this.outputStream.close(); this.inputStream.close(); this.transport.close(Components.results.NS_OK); }, watch: function(c) { LOG("watch called\n"); try { // Go into "watcher" mode var mode = '?WATCH={"enable":true,"json":true}'; this.outputStream.write(mode, mode.length); } catch (e) { return; } var dataListener = { onStartRequest: function(request, context) {}, onStopRequest: function(request, context, status) {}, onDataAvailable: function(request, context, inputStream, offset, count) { var sInputStream = Cc["@mozilla.org/scriptableinputstream;1"].createInstance(Ci.nsIScriptableInputStream); sInputStream.init(inputStream); var responseSentence = sInputStream.read(count); var response = null; try { response = JSON.parse(responseSentence); } catch (e) { return; } // is the right kind of sentence? if (response.class != 'TPV') { //don't do anything return; } // is there a fix? if (response.mode == '1') { // don't do anything return; } LOG("Got info: " + responseSentence); // The API requires these values, if one is missing // we return without updating the position. if (response.time && response.lat && response.lon && response.epx && response.epy) { var timestamp = response.time; // UTC var latitude = response.lat; // degrees var longitude = response.lon; // degrees var horizontalError = Math.max(response.epx,response.epy); } // meters else { return; } // Altitude is optional, but if it's present, so must be vertical precision. var altitude = null; var verticalError = null; if (response.alt && response.epv) { altitude = response.alt; // meters verticalError = response.epv; // meters } var speed = null; if (response.speed) { var speed = response.speed; } // meters/sec var course = null; if (response.track) { var course = response.track; } // degrees var geoPos = new GeoPositionObject(latitude, longitude, altitude, horizontalError, verticalError, course, speed, timestamp); c.update(geoPos); LOG("Position updated:" + timestamp + "," + latitude + "," + longitude + "," + horizontalError + "," + altitude + "," + verticalError + "," + course + "," + speed); } }; var pump = Cc["@mozilla.org/network/input-stream-pump;1"].createInstance(Ci.nsIInputStreamPump); pump.init(this.inputStream, -1, -1, 0, 0, false); pump.asyncRead(dataListener, null); }, }; var NSGetFactory = XPCOMUtils.generateNSGetFactory([GPSDProvider]);