(function ($) {

/**

 * Auto-hide summary textarea if empty and show hide and unhide links.

 */

Drupal.behaviors.textSummary = {

  attach: function (context, settings) {

    $('.text-summary', context).once('text-summary', function () {

      var $widget = $(this).closest('div.field-type-text-with-summary');

      var $summaries = $widget.find('div.text-summary-wrapper');

      $summaries.once('text-summary-wrapper').each(function(index) {

        var $summary = $(this);

        var $summaryLabel = $summary.find('label').first();

        var $full = $widget.find('.text-full').eq(index).closest('.form-item');

        var $fullLabel = $full.find('label').first();

        // Create a placeholder label when the field cardinality is

        // unlimited or greater than 1.

        if ($fullLabel.length == 0) {

          $fullLabel = $('<label></label>').prependTo($full);

        }

        // Setup the edit/hide summary link.

        var $link = $('<span class="field-edit-link">(<a class="link-edit-summary" href="#">' + Drupal.t('Hide summary') + '</a>)</span>');

        var $a = $link.find('a');

        var toggleClick = true;

        $link.bind('click', function (e) {

          if (toggleClick) {

            $summary.hide();

            $a.html(Drupal.t('Edit summary'));

            $link.appendTo($fullLabel);

          }

          else {

            $summary.show();

            $a.html(Drupal.t('Hide summary'));

            $link.appendTo($summaryLabel);

          }

          toggleClick = !toggleClick;

          return false;

        }).appendTo($summaryLabel);

        // If no summary is set, hide the summary field.

        if ($(this).find('.text-summary').val() == '') {

          $link.click();

        }

      });

    });

  }

};

})(jQuery);