utils.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.update-extensions';

	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);
}