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94 lines
3.0 KiB
JavaScript
94 lines
3.0 KiB
JavaScript
// -*- Mode: js2; tab-width: 2; indent-tabs-mode: nil; js2-basic-offset: 2; js2-skip-preprocessor-directives: t; -*-
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/* This Source Code Form is subject to the terms of the Mozilla Public
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* License, v. 2.0. If a copy of the MPL was not distributed with this
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* file, You can obtain one at http://mozilla.org/MPL/2.0/. */
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"use strict";
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const { classes: Cc, interfaces: Ci, utils: Cu } = Components;
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Cu.import("resource://gre/modules/Services.jsm"); /*global Services */
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Cu.import("resource://gre/modules/Messaging.jsm");
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Cu.import("resource://gre/modules/SimpleServiceDiscovery.jsm"); /*global SimpleServiceDiscovery */
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const EVENT_SERVICE_FOUND = SimpleServiceDiscovery.EVENT_SERVICE_FOUND;
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const EVENT_SERVICE_LOST = SimpleServiceDiscovery.EVENT_SERVICE_LOST;
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// We want to keep this page fresh while it is open, so we decrease
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// our time between searches when it is opened, and revert to the
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// former time between searches when it is closed.
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const SEARCH_INTERVAL_IN_MILLISECONDS = 5 * 1000;
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function dump(s) {
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Services.console.logStringMessage("aboutDevices :: " + s);
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}
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var Devices = {
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_savedSearchInterval: -1,
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init: function() {
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dump("Initializing.");
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Services.obs.addObserver(this, EVENT_SERVICE_FOUND, false);
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Services.obs.addObserver(this, EVENT_SERVICE_LOST, false);
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let button = document.getElementById("refresh");
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button.addEventListener("click", () => {
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this.updateDeviceList();
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}, false);
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this._savedSearchInterval = SimpleServiceDiscovery.search(SEARCH_INTERVAL_IN_MILLISECONDS);
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this.updateDeviceList();
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},
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uninit: function() {
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dump("Uninitializing.");
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Services.obs.removeObserver(this, EVENT_SERVICE_FOUND);
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Services.obs.removeObserver(this, EVENT_SERVICE_LOST);
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if (this._savedSearchInterval > 0) {
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SimpleServiceDiscovery.search(this._savedSearchInterval);
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}
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},
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_createItemForDevice: function(device) {
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let item = document.createElement("div");
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let friendlyName = document.createElement("div");
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friendlyName.classList.add("name");
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friendlyName.textContent = device.friendlyName;
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item.appendChild(friendlyName);
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let location = document.createElement("div");
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location.classList.add("location");
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location.textContent = device.location;
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item.appendChild(location);
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return item;
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},
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updateDeviceList: function() {
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let services = SimpleServiceDiscovery.services;
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dump("Updating device list with " + services.length + " services.");
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let list = document.getElementById("devices-list");
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while (list.firstChild) {
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list.removeChild(list.firstChild);
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}
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for (let service of services) {
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let item = this._createItemForDevice(service);
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list.appendChild(item);
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}
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},
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observe: function(subject, topic, data) {
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if (topic == EVENT_SERVICE_FOUND || topic == EVENT_SERVICE_LOST) {
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this.updateDeviceList();
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}
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},
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};
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window.addEventListener("load", Devices.init.bind(Devices), false);
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window.addEventListener("unload", Devices.uninit.bind(Devices), false);
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