зеркало из https://github.com/mozilla/pjs.git
241 строка
7.9 KiB
JavaScript
241 строка
7.9 KiB
JavaScript
/* ***** BEGIN LICENSE BLOCK *****
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* Version: MPL 1.1/GPL 2.0/LGPL 2.1
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*
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* The contents of this file are subject to the Mozilla Public License Version
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* 1.1 (the "License"); you may not use this file except in compliance with
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* the License. You may obtain a copy of the License at
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* http://www.mozilla.org/MPL/
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*
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* Software distributed under the License is distributed on an "AS IS" basis,
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* WITHOUT WARRANTY OF ANY KIND, either express or implied. See the License
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* for the specific language governing rights and limitations under the
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* License.
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*
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* The Original Code is Geolocation.
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*
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* The Initial Developer of the Original Code is Mozilla Foundation
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* Portions created by the Initial Developer are Copyright (C) 2008
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* the Initial Developer. All Rights Reserved.
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*
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* Contributor(s):
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* Martin McNickle <mmcnickle@gmail.com>
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*
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* Based on static_geolocation_provider.js by:
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* Doug Turner <dougt@meer.net>
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*
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*
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* Alternatively, the contents of this file may be used under the terms of
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* either the GNU General Public License Version 2 or later (the "GPL"), or
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* the GNU Lesser General Public License Version 2.1 or later (the "LGPL"),
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* in which case the provisions of the GPL or the LGPL are applicable instead
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* of those above. If you wish to allow use of your version of this file only
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* under the terms of either the GPL or the LGPL, and not to allow others to
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* use your version of this file under the terms of the MPL, indicate your
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* decision by deleting the provisions above and replace them with the notice
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* and other provisions required by the GPL or the LGPL. If you do not delete
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* the provisions above, a recipient may use your version of this file under
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* the terms of any one of the MPL, the GPL or the LGPL.
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*
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* ***** END LICENSE BLOCK ***** */
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Components.utils.import("resource://gre/modules/XPCOMUtils.jsm");
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const Ci = Components.interfaces;
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const Cc = Components.classes;
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var gLoggingEnabled = false;
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function LOG(aMsg) {
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if (gLoggingEnabled)
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{
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aMsg = ("*** GPSD GEO: " + aMsg);
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Cc["@mozilla.org/consoleservice;1"].getService(Ci.nsIConsoleService).logStringMessage(aMsg);
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dump(aMsg);
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}
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}
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function GeoPositionCoordsObject(latitude, longitude, altitude, accuracy, altitudeAccuracy, heading, speed) {
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this.latitude = latitude;
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this.longitude = longitude;
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this.altitude = altitude;
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this.accuracy = accuracy;
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this.altitudeAccuracy = altitudeAccuracy;
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this.heading = heading;
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this.speed = speed;
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};
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GeoPositionCoordsObject.prototype = {
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QueryInterface: XPCOMUtils.generateQI([Ci.nsIDOMGeoPositionCoords]),
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// Class Info is required to be able to pass objects back into the DOM.
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classInfo: XPCOMUtils.generateCI({interfaces: [Ci.nsIDOMGeoPositionCoords],
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flags: Ci.nsIClassInfo.DOM_OBJECT,
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classDescription: "Geoposition Coordinate Object"}),
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latitude: null,
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longitude: null,
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altitude: null,
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accuracy: null,
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altitudeAccuracy: null,
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heading: null,
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speed: null,
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};
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function GeoPositionObject(latitude, longitude, altitude, accuracy, altitudeAccuracy, heading, speed, timestamp) {
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this.coords = new GeoPositionCoordsObject(latitude, longitude, altitude, accuracy, altitudeAccuracy, heading, speed);
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this.timestamp = timestamp;
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};
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GeoPositionObject.prototype = {
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QueryInterface: XPCOMUtils.generateQI([Ci.nsIDOMGeoPosition]),
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// Class Info is required to be able to pass objects back into the DOM.
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classInfo: XPCOMUtils.generateCI({interfaces: [Ci.nsIDOMGeoPosition],
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flags: Ci.nsIClassInfo.DOM_OBJECT,
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classDescription: "Geoposition Object"}),
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coords: null,
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timestamp: null,
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};
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function GPSDProvider() {
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this.prefService = Cc["@mozilla.org/preferences-service;1"].getService(Ci.nsIPrefBranch).QueryInterface(Ci.nsIPrefService);
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try {
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gLoggingEnabled = this.prefService.getBoolPref("geo.gpsd.logging.enabled");
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} catch (e) {}
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};
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GPSDProvider.prototype = {
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QueryInterface: XPCOMUtils.generateQI([Ci.nsIGeolocationProvider]),
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classID: Components.ID("{0A3BE523-0F2A-32CC-CCD8-1E5986D5A79D}"),
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prefService: null,
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transport: null,
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outputStream: null,
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inputStream: null,
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startup: function() {
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LOG("startup called\n");
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var socketTransportService = Cc["@mozilla.org/network/socket-transport-service;1"].getService(Ci.nsISocketTransportService);
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var hostIPAddr = "127.0.0.1";
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var hostPort = "2947";
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try {
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hostIPAddr = this.prefService.getCharPref("geo.gpsd.host.ipaddr");
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} catch (e) {}
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try {
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hostPort = this.prefService.getCharPref("geo.gpsd.host.port");
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} catch (e) {}
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LOG("Host info: " + hostIPAddr + ":" + hostPort + "\n");
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this.transport = socketTransportService.createTransport(null, 0, hostIPAddr, hostPort, null);
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// Alright to open streams here as they are non-blocking by default
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this.outputStream = this.transport.openOutputStream(0,0,0);
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this.inputStream = this.transport.openInputStream(0,0,0);
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},
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shutdown: function() {
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LOG("shutdown called\n");
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this.outputStream.close();
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this.inputStream.close();
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this.transport.close(Components.results.NS_OK);
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},
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watch: function(c) {
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LOG("watch called\n");
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try {
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// Go into "watcher" mode
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var mode = '?WATCH={"enable":true,"json":true}';
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this.outputStream.write(mode, mode.length);
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} catch (e) { return; }
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var dataListener = {
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onStartRequest: function(request, context) {},
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onStopRequest: function(request, context, status) {},
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onDataAvailable: function(request, context, inputStream, offset, count) {
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var sInputStream = Cc["@mozilla.org/scriptableinputstream;1"].createInstance(Ci.nsIScriptableInputStream);
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sInputStream.init(inputStream);
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var responseSentence = sInputStream.read(count);
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var response = null;
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try {
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response = JSON.parse(responseSentence);
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} catch (e) { return; }
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// is the right kind of sentence?
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if (response.class != 'TPV') {
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//don't do anything
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return;
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}
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// is there a fix?
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if (response.mode == '1') {
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// don't do anything
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return;
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}
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LOG("Got info: " + responseSentence);
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// The API requires these values, if one is missing
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// we return without updating the position.
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if (response.time && response.lat && response.lon
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&& response.epx && response.epy) {
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var timestamp = response.time; // UTC
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var latitude = response.lat; // degrees
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var longitude = response.lon; // degrees
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var horizontalError = Math.max(response.epx,response.epy); } // meters
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else { return; }
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// Altitude is optional, but if it's present, so must be vertical precision.
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var altitude = null;
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var verticalError = null;
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if (response.alt && response.epv) {
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altitude = response.alt; // meters
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verticalError = response.epv; // meters
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}
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var speed = null;
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if (response.speed) { var speed = response.speed; } // meters/sec
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var course = null;
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if (response.track) { var course = response.track; } // degrees
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var geoPos = new GeoPositionObject(latitude, longitude, altitude, horizontalError, verticalError, course, speed, timestamp);
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c.update(geoPos);
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LOG("Position updated:" + timestamp + "," + latitude + "," + longitude + ","
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+ horizontalError + "," + altitude + "," + verticalError + "," + course
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+ "," + speed);
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}
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};
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var pump = Cc["@mozilla.org/network/input-stream-pump;1"].createInstance(Ci.nsIInputStreamPump);
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pump.init(this.inputStream, -1, -1, 0, 0, false);
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pump.asyncRead(dataListener, null);
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},
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};
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var NSGetFactory = XPCOMUtils.generateNSGetFactory([GPSDProvider]);
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