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/* 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/. */
const { Cc, Ci } = require("chrome");
const observers = require("observer-service");
const { EventEmitter } = require("events");
const unload = require("unload");
const prefService = require("preferences-service");
const { jetpackID } = require("@packaging");
const ADDON_BRANCH = "extensions." + jetpackID + ".";
const BUTTON_PRESSED = jetpackID + "-cmdPressed";
// XXX Currently, only Firefox implements the inline preferences.
if (!require("xul-app").is("Firefox"))
throw Error("This API is only supported in Firefox");
let branch = Cc["@mozilla.org/preferences-service;1"].
getService(Ci.nsIPrefService).
getBranch(ADDON_BRANCH).
QueryInterface(Ci.nsIPrefBranch2);
const events = EventEmitter.compose({
constructor: function Prefs() {
// Log unhandled errors.
this.on("error", console.exception.bind(console));
// Make sure we remove all the listeners
unload.ensure(this);
this._prefObserver = this._prefObserver.bind(this);
this._buttonObserver = this._buttonObserver.bind(this);
// Listen to changes in the preferences
branch.addObserver("", this._prefObserver, false);
// Listen to clicks on buttons
observers.add(BUTTON_PRESSED, this._buttonObserver, this);
},
_prefObserver: function PrefsPrefObserver(subject, topic, prefName) {
if (topic == "nsPref:changed") {
this._emit(prefName, prefName);
}
},
_buttonObserver: function PrefsButtonObserver(subject, data) {
this._emit(data);
},
unload: function manager_unload() {
this._removeAllListeners();
branch.removeObserver("", this._prefObserver);
},
})();
const simple = Proxy.create({
get: function(receiver, pref) {
return prefService.get(ADDON_BRANCH + pref);
},
set: function(receiver, pref, val) {
prefService.set(ADDON_BRANCH + pref, val);
},
delete: function(pref) {
prefService.reset(ADDON_BRANCH + pref);
return true;
},
has: function(pref) {
return prefService.has(ADDON_BRANCH + pref);
}
});
exports.on = events.on;
exports.removeListener = events.removeListener;
exports.prefs = simple;
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