prefs.js

const GLib = imports.gi.GLib;
const Gio  = imports.gi.Gio;
const Gtk  = imports.gi.Gtk;
const Me   = imports.misc.extensionUtils.getCurrentExtension();

const SchemaSource = Gio.SettingsSchemaSource.new_from_directory(
  Me.dir.get_path(), Gio.SettingsSchemaSource.get_default(), false);
const settings = new Gio.Settings({
  settings_schema: SchemaSource.lookup(Me.metadata['settings-schema'], true)
});
const bindings = new Gio.Settings({
  settings_schema: SchemaSource.lookup(Me.metadata['settings-schema'] + '.keybindings', true)
});

function prefsWidget(gs) {
  const widget = new Gtk.Box({
    expand: true,
    halign: Gtk.Align.CENTER,
    valign: Gtk.Align.CENTER,
    margin: 6,
    spacing: 6,
    orientation: Gtk.Orientation.VERTICAL
  });
  gs.settings_schema.list_keys().forEach(name => {
    const key = gs.settings_schema.get_key(name);
    const box = new Gtk.Box({hexpand: true});
    widget.add(box);
    box.pack_start(new Gtk.Label({
      label:        key.get_summary(),
      tooltip_text: key.get_description(),
    }), false, false, 6);
    const val = new Gtk.Entry({text: gs.get_value(name).print(false)});
    const typ = key.get_value_type();
    val.connect('changed', () => {
      try {
        gs.set_value(name, GLib.Variant.parse(typ, val.text, null, null));
      } catch (_) {}
    });
    box.pack_end(val, false, false, 6);
    box.pack_end(new Gtk.Label({label: '@' + typ.dup_string()}), false, false, 6);
  });
  return widget;
}

function buildPrefsWidget() {
  const ntbk = new Gtk.Notebook({});
  ntbk.append_page(prefsWidget(settings), Gtk.Label.new('Settings'));
  ntbk.append_page(prefsWidget(bindings), Gtk.Label.new('Keybindings'));
  ntbk.show_all();
  return ntbk;
}

function init() {}