gecko-dev/toolkit/components/contentprefs/ContentPrefUtils.jsm

53 lines
1.3 KiB
JavaScript

/* vim: set ts=2 sw=2 sts=2 et tw=80: */
/* 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/. */
"use strict";
this.EXPORTED_SYMBOLS = [
"ContentPref",
"cbHandleResult",
"cbHandleError",
"cbHandleCompletion",
"safeCallback",
];
const { interfaces: Ci, classes: Cc, results: Cr, utils: Cu } = Components;
Cu.import("resource://gre/modules/XPCOMUtils.jsm");
Cu.import("resource://gre/modules/Services.jsm");
function ContentPref(domain, name, value) {
this.domain = domain;
this.name = name;
this.value = value;
}
ContentPref.prototype = {
QueryInterface: XPCOMUtils.generateQI([Ci.nsIContentPref]),
};
function cbHandleResult(callback, pref) {
safeCallback(callback, "handleResult", [pref]);
}
function cbHandleCompletion(callback, reason) {
safeCallback(callback, "handleCompletion", [reason]);
}
function cbHandleError(callback, nsresult) {
safeCallback(callback, "handleError", [nsresult]);
}
function safeCallback(callbackObj, methodName, args) {
if (!callbackObj || typeof(callbackObj[methodName]) != "function")
return;
try {
callbackObj[methodName].apply(callbackObj, args);
}
catch (err) {
Cu.reportError(err);
}
}