gecko-dev/browser/modules/TransientPrefs.jsm

25 строки
731 B
JavaScript

/* 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 = ["TransientPrefs"];
Components.utils.import("resource://gre/modules/Preferences.jsm");
var prefVisibility = new Map;
/* Use for preferences that should only be visible when they've been modified.
When reset to their default state, they remain visible until restarting the
application. */
this.TransientPrefs = {
prefShouldBeVisible(prefName) {
if (Preferences.isSet(prefName))
prefVisibility.set(prefName, true);
return !!prefVisibility.get(prefName);
}
};