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/**
* GNU LibreJSXUL - A browser add-on to block nonfree nontrivial JavaScript.
* *
* Copyright (C) 2014, 2015 Nik Nyby
*
* This file is part of GNU LibreJSXUL.
*
* GNU LibreJSXUL is free software: you can redistribute it and/or modify
* it under the terms of the GNU General Public License as published by
* the Free Software Foundation, either version 3 of the License, or
* (at your option) any later version.
*
* GNU LibreJSXUL is distributed in the hope that it will be useful,
* but WITHOUT ANY WARRANTY; without even the implied warranty of
* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
* GNU General Public License for more details.
*
* You should have received a copy of the GNU General Public License
* along with GNU LibreJSXUL. If not, see <http://www.gnu.org/licenses/>.
*/
var {Cc, Ci} = require("chrome");
const httpObserver = require("../http_observer/http_request_observer");
// https://developer.mozilla.org/en-US/Add-ons/Code_snippets/Preferences#Using_preference_observers
var prefObserver = {
register: function() {
// First we'll need the preference services to look for preferences.
var prefService = Cc["@mozilla.org/preferences-service;1"]
.getService(Ci.nsIPrefService);
// For this.branch we ask for the preferences for
// extensions.myextension. and children
this.branch = prefService.getBranch("javascript.");
// Finally add the observer.
this.branch.addObserver("", this, false);
},
unregister: function() {
this.branch.removeObserver("", this);
},
observe: function(aSubject, aTopic, aData) {
// aSubject is the nsIPrefBranch we're observing (after appropriate QI)
// aData is the name of the pref that's been changed (relative to
// aSubject)
switch (aData) {
case "enabled":
var prefs = require('sdk/preferences/service');
var isJavaScriptEnabled = prefs.get('javascript.enabled');
if (!isJavaScriptEnabled) {
console.debug('JS disabled in observer');
// remove all http notifications
httpObserver.removeHttpObserver();
// TODO: the narcissus worker could also be stopped at this
// point, but I'm not doing that right now because I don't
// know how to re-enable it.
// narcissusWorker.stopWorker();
} else {
console.debug('JS enabled in observer');
httpObserver.startHttpObserver();
}
break;
}
}
};
exports.register = function() {
prefObserver.register();
};
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