(function ($) {

Drupal.behaviors.menuFieldsetSummaries = {

  attach: function (context) {

    $('fieldset.menu-link-form', context).drupalSetSummary(function (context) {

      if ($('.form-item-menu-enabled input', context).is(':checked')) {

        return Drupal.checkPlain($('.form-item-menu-link-title input', context).val());

      }

      else {

        return Drupal.t('Not in menu');

      }

    });

  }

};

/**

 * Automatically fill in a menu link title, if possible.

 */

Drupal.behaviors.menuLinkAutomaticTitle = {

  attach: function (context) {

    $('fieldset.menu-link-form', context).each(function () {

      // Try to find menu settings widget elements as well as a 'title' field in

      // the form, but play nicely with user permissions and form alterations.

      var $checkbox = $('.form-item-menu-enabled input', this);

      var $link_title = $('.form-item-menu-link-title input', context);

      var $title = $(this).closest('form').find('.form-item-title input');

      // Bail out if we do not have all required fields.

      if (!($checkbox.length && $link_title.length && $title.length)) {

        return;

      }

      // If there is a link title already, mark it as overridden. The user expects

      // that toggling the checkbox twice will take over the node's title.

      if ($checkbox.is(':checked') && $link_title.val().length) {

        $link_title.data('menuLinkAutomaticTitleOveridden', true);

      }

      // Whenever the value is changed manually, disable this behavior.

      $link_title.keyup(function () {

        $link_title.data('menuLinkAutomaticTitleOveridden', true);

      });

      // Global trigger on checkbox (do not fill-in a value when disabled).

      $checkbox.change(function () {

        if ($checkbox.is(':checked')) {

          if (!$link_title.data('menuLinkAutomaticTitleOveridden')) {

            $link_title.val($title.val());

          }

        }

        else {

          $link_title.val('');

          $link_title.removeData('menuLinkAutomaticTitleOveridden');

        }

        $checkbox.closest('fieldset.vertical-tabs-pane').trigger('summaryUpdated');

        $checkbox.trigger('formUpdated');

      });

      // Take over any title change.

      $title.keyup(function () {

        if (!$link_title.data('menuLinkAutomaticTitleOveridden') && $checkbox.is(':checked')) {

          $link_title.val($title.val());

          $link_title.val($title.val()).trigger('formUpdated');

        }

      });

    });

  }

};

})(jQuery);