michael@0: /* This Source Code Form is subject to the terms of the Mozilla Public
michael@0:  * License, v. 2.0. If a copy of the MPL was not distributed with this
michael@0:  * file, You can obtain one at http://mozilla.org/MPL/2.0/. */
michael@0: 
michael@0: const Cc = Components.classes;
michael@0: const Ci = Components.interfaces;
michael@0: var gProtocols = [];
michael@0: var gContainer;
michael@0: window.onload = function () {
michael@0:   gContainer = document.getElementById("abouts");
michael@0:   findAbouts();
michael@0: }
michael@0: 
michael@0: function findAbouts() {
michael@0:   var ios = Cc["@mozilla.org/network/io-service;1"].getService(Ci.nsIIOService);
michael@0:   for (var cid in Cc) {
michael@0:     var result = cid.match(/@mozilla.org\/network\/protocol\/about;1\?what\=(.*)$/);
michael@0:     if (result) {
michael@0:       var aboutType = result[1];
michael@0:       var contract = "@mozilla.org/network/protocol/about;1?what=" + aboutType;
michael@0:       try {
michael@0:         var am = Cc[contract].getService(Ci.nsIAboutModule);
michael@0:         var uri = ios.newURI("about:"+aboutType, null, null);
michael@0:         var flags = am.getURIFlags(uri);
michael@0:         if (!(flags & Ci.nsIAboutModule.HIDE_FROM_ABOUTABOUT)) {
michael@0:           gProtocols.push(aboutType);
michael@0:         }
michael@0:       } catch (e) {
michael@0:         // getService might have thrown if the component doesn't actually
michael@0:         // implement nsIAboutModule
michael@0:       }
michael@0:     }
michael@0:   }
michael@0:   gProtocols.sort().forEach(createProtocolListing);
michael@0: }
michael@0: 
michael@0: function createProtocolListing(aProtocol) {
michael@0:   var uri = "about:" + aProtocol;
michael@0:   var li = document.createElement("li");
michael@0:   var link = document.createElement("a");
michael@0:   var text = document.createTextNode(uri);
michael@0: 
michael@0:   link.href = uri;
michael@0:   link.appendChild(text);
michael@0:   li.appendChild(link);
michael@0:   gContainer.appendChild(li);
michael@0: }