convenience.js

/*
 * IP Finder gnome extension
 * https://github.com/LinxGem33/IP-Finder
 * 
 * Copyright (C) 2017 LinxGem33 (Andy C)
 *
 * This file is part of IP Finder gnome extension.
 * IP Finder gnome extension is free software: you can redistribute it and/or modify
 * it under the terms of the GNU General Public License as published by
 * the Free Software Foundation, either version 3 of the License, or
 * (at your option) any later version.
 *
 * IP Finder gnome extension is distributed in the hope that it will be useful,
 * but WITHOUT ANY WARRANTY; without even the implied warranty of
 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
 * GNU General Public License for more details.
 *
 * You should have received a copy of the GNU General Public License
 * along with IP Finder gnome extension.  If not, see <http://www.gnu.org/licenses/>.
 * 
 */

/* -*- mode: js; js-basic-offset: 4; indent-tabs-mode: nil -*- */


const Gettext = imports.gettext;
const Gio = imports.gi.Gio;
const GLib = imports.gi.GLib;

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

/**
 * 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);
}

/**
 * getSettings:
 * @schema: (optional): the GSettings schema id
 *
 * Builds and return a GSettings schema for @schema, using schema files
 * in extensionsdir/schemas. If @schema is not provided, it is taken from
 * metadata['settings-schema'].
 */
function getSettings(schema) {
    let extension = ExtensionUtils.getCurrentExtension();

    schema = schema || extension.metadata['settings-schema'];

    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 });
}

function getVersion() {
  try {
    let params = GLib.Variant.new('(ss)',
      ['org.gnome.DisplayManager.Manager', 'Version']);
    let result = Gio.DBus.system.call_sync('org.gnome.DisplayManager',
                                           '/org/gnome/DisplayManager/Manager',
                                           'org.freedesktop.DBus.Properties',
                                           'Get', params, null,
                                           Gio.DBusCallFlags.NONE,
                                           -1, null);

    let version = result.deep_unpack()[0].deep_unpack();
    return version;
  } catch (e) {
    return false;
  }
}