/**
* DO NOT EDIT THIS FILE.
* See the following change record for more information,
* https://www.drupal.org/node/2815083
* @preserve
**/
(function ($, _ref) {
  var tabbable = _ref.tabbable,
    isTabbable = _ref.isTabbable;
  $.widget('ui.dialog', $.ui.dialog, {
    options: {
      buttonClass: 'button',
      buttonPrimaryClass: 'button--primary'
    },
    _createButtons: function _createButtons() {
      var opts = this.options;
      var primaryIndex;
      var index;
      var il = opts.buttons.length;
      for (index = 0; index < il; index++) {
        if (opts.buttons[index].primary && opts.buttons[index].primary === true) {
          primaryIndex = index;
          delete opts.buttons[index].primary;
          break;
        }
      }
      this._super();
      var $buttons = this.uiButtonSet.children().addClass(opts.buttonClass);
      if (typeof primaryIndex !== 'undefined') {
        $buttons.eq(index).addClass(opts.buttonPrimaryClass);
      }
    },
    _focusTabbable: function _focusTabbable() {
      var hasFocus = this._focusedElement ? this._focusedElement.get(0) : null;
      if (!hasFocus) {
        hasFocus = this.element.find('[autofocus]').get(0);
      }
      if (!hasFocus) {
        var $elements = [this.element, this.uiDialogButtonPane];
        for (var i = 0; i < $elements.length; i++) {
          var element = $elements[i].get(0);
          if (element) {
            var elementTabbable = tabbable(element);
            hasFocus = elementTabbable.length ? elementTabbable[0] : null;
          }
          if (hasFocus) {
            break;
          }
        }
      }
      if (!hasFocus) {
        var closeBtn = this.uiDialogTitlebarClose.get(0);
        hasFocus = closeBtn && isTabbable(closeBtn) ? closeBtn : null;
      }
      if (!hasFocus) {
        hasFocus = this.uiDialog.get(0);
      }
      $(hasFocus).eq(0).trigger('focus');
    }
  });
})(jQuery, window.tabbable);