convenience.js

const Gettext = imports.gettext;
const Lang = imports.lang;

const Gio = imports.gi.Gio;

const Config = imports.misc.config;
const ExtensionUtils = imports.misc.extensionUtils;

function getSettings() {
    let extension = ExtensionUtils.getCurrentExtension();
    let schema = 'org.gnome.shell.extensions.no-title-bar';

    const GioSSS = Gio.SettingsSchemaSource;

    // check if this extension was built with "make zip-file", and thus
    // has the schema files in a subfolder
    // otherwise assume that extension has been installed in the
    // same prefix as gnome-shell (and therefore schemas are available
    // in the standard folders)
    let schemaDir = extension.dir.get_child('schemas');
    let schemaSource;
    if (schemaDir.query_exists(null)) {
        schemaSource = GioSSS.new_from_directory(schemaDir.get_path(),
                GioSSS.get_default(),
                false);
    } else {
        schemaSource = GioSSS.get_default();
    }

    let schemaObj = schemaSource.lookup(schema, true);
    if (!schemaObj) {
        throw new Error('Schema ' + schema + ' could not be found for extension ' +
                extension.metadata.uuid + '. Please check your installation.');
    }

    return new Gio.Settings({settings_schema: schemaObj});
}

/**
 * initTranslations:
 * @domain: (optional): the gettext domain to use
 *
 * Initialize Gettext to load translations from extensionsdir/locale.
 * If @domain is not provided, it will be taken from metadata['gettext-domain']
 */
function initTranslations(domain) {
    let extension = ExtensionUtils.getCurrentExtension();

    domain = domain || extension.metadata['gettext-domain'];

    // check if this extension was built with "make zip-file", and thus
    // has the locale files in a subfolder
    // otherwise assume that extension has been installed in the
    // same prefix as gnome-shell
    let localeDir = extension.dir.get_child('locale');
    if (localeDir.query_exists(null))
        Gettext.bindtextdomain(domain, localeDir.get_path());
    else
        Gettext.bindtextdomain(domain, Config.LOCALEDIR);
}