(function($) {
  Drupal.behaviors.chosen = {
    attach: function(context, settings) {
      settings.chosen = settings.chosen || Drupal.settings.chosen;

      // Prepare selector and add unwantend selectors.
      var selector = settings.chosen.selector;

      // Function to prepare all the options together for the chosen() call.
      var getElementOptions = function (element) {
        var options = $.extend({}, settings.chosen.options);

        // The width default option is considered the minimum width, so this
        // must be evaluated for every option.
        if ($(element).width() < settings.chosen.minimum_width) {
          options.width = settings.chosen.minimum_width + 'px';
        }
        else {
          options.width = $(element).width() + 'px';
        }

        // Some field widgets have cardinality, so we must respect that.
        // @see chosen_pre_render_select()
        if ($(element).attr('multiple') && $(element).data('cardinality')) {
          options.max_selected_options = $(element).data('cardinality');
        }

        return options;
      };

      // Process elements that have opted-in for Chosen.
      // @todo Remove support for the deprecated chosen-widget class.
      $('select.chosen-enable, select.chosen-widget', context).once('chosen', function() {
        options = getElementOptions(this);
        $(this).chosen(options);
      });

      $(selector, context)
        // Disabled on:
        // - Field UI
        // - WYSIWYG elements
        // - Tabledrag weights
        // - Elements that have opted-out of Chosen
        // - Elements already processed by Chosen
        .not('#field-ui-field-overview-form select, #field-ui-display-overview-form select, .wysiwyg, .draggable select[name$="[weight]"], .draggable select[name$="[position]"], .chosen-disable, .chosen-processed')
        .filter(function() {
          // Filter out select widgets that do not meet the minimum number of
          // options.
          var minOptions = $(this).attr('multiple') ? settings.chosen.minimum_multiple : settings.chosen.minimum_single;
          if (!minOptions) {
            // Zero value means no minimum.
            return true;
          }
          else {
            return $(this).find('option').length >= minOptions;
          }
        })
        .once('chosen', function() {
          options = getElementOptions(this);
          $(this).chosen(options);
        });
    }
  };
})(jQuery);