(function ($) {

/**

 * Retrieves the summary for the first element.

 */

$.fn.drupalGetSummary = function () {

  var callback = this.data('summaryCallback');

  return (this[0] && callback) ? $.trim(callback(this[0])) : '';

};

/**

 * Sets the summary for all matched elements.

 *

 * @param callback

 *   Either a function that will be called each time the summary is

 *   retrieved or a string (which is returned each time).

 */

$.fn.drupalSetSummary = function (callback) {

  var self = this;

  // To facilitate things, the callback should always be a function. If it's

  // not, we wrap it into an anonymous function which just returns the value.

  if (typeof callback != 'function') {

    var val = callback;

    callback = function () { return val; };

  }

  return this

    .data('summaryCallback', callback)

    // To prevent duplicate events, the handlers are first removed and then

    // (re-)added.

    .unbind('formUpdated.summary')

    .bind('formUpdated.summary', function () {

      self.trigger('summaryUpdated');

    })

    // The actual summaryUpdated handler doesn't fire when the callback is

    // changed, so we have to do this manually.

    .trigger('summaryUpdated');

};

/**

 * Sends a 'formUpdated' event each time a form element is modified.

 */

Drupal.behaviors.formUpdated = {

  attach: function (context) {

    // These events are namespaced so that we can remove them later.

    var events = 'change.formUpdated click.formUpdated blur.formUpdated keyup.formUpdated';

    $(context)

      // Since context could be an input element itself, it's added back to

      // the jQuery object and filtered again.

      .find(':input').andSelf().filter(':input')

      // To prevent duplicate events, the handlers are first removed and then

      // (re-)added.

      .unbind(events).bind(events, function () {

        $(this).trigger('formUpdated');

      });

  }

};

/**

 * Prepopulate form fields with information from the visitor cookie.

 */

Drupal.behaviors.fillUserInfoFromCookie = {

  attach: function (context, settings) {

    $('form.user-info-from-cookie').once('user-info-from-cookie', function () {

      var formContext = this;

      $.each(['name', 'mail', 'homepage'], function () {

        var $element = $('[name=' + this + ']', formContext);

        var cookie = $.cookie('Drupal.visitor.' + this);

        if ($element.length && cookie) {

          $element.val(cookie);

        }

      });

    });

  }

};

})(jQuery);