Tableselect::processTableselect

public static Tableselect::processTableselect(&$element, FormStateInterface $form_state, &$complete_form)

public static function processTableselect(&$element, FormStateInterface $form_state, &$complete_form) {
  if ($element['#multiple']) {
    $value = is_array($element['#value']) ? $element['#value'] : array();
  }
  else {
    // Advanced selection behavior makes no sense for radios.
    $element['#js_select'] = FALSE;
  }

  $element['#tree'] = TRUE;

  if (count($element['#options']) > 0) {
    if (!isset($element['#default_value']) || $element['#default_value'] === 0) {
      $element['#default_value'] = array();
    }

    // Create a checkbox or radio for each item in #options in such a way that
    // the value of the tableselect element behaves as if it had been of type
    // checkboxes or radios.
    foreach ($element['#options'] as $key => $choice) {
      // Do not overwrite manually created children.
      if (!isset($element[$key])) {
        if ($element['#multiple']) {
          $title = '';
          if (isset($element['#options'][$key]['title']) && is_array($element['#options'][$key]['title'])) {
            if (!empty($element['#options'][$key]['title']['data']['#title'])) {
              $title = new TranslatableMarkup('Update @title', array(
                '@title' => $element['#options'][$key]['title']['data']['#title'],
              ));
            }
          }
          $element[$key] = array(
            '#type' => 'checkbox',
            '#title' => $title,
            '#title_display' => 'invisible',
            '#return_value' => $key,
            '#default_value' => isset($value[$key]) ? $key : NULL,
            '#attributes' => $element['#attributes'],
            '#ajax' => isset($element['#ajax']) ? $element['#ajax'] : NULL,
          );
        }
        else {
          // Generate the parents as the autogenerator does, so we will have a
          // unique id for each radio button.
          $parents_for_id = array_merge($element['#parents'], array($key));
          $element[$key] = array(
            '#type' => 'radio',
            '#title' => '',
            '#return_value' => $key,
            '#default_value' => ($element['#default_value'] == $key) ? $key : NULL,
            '#attributes' => $element['#attributes'],
            '#parents' => $element['#parents'],
            '#id' => HtmlUtility::getUniqueId('edit-' . implode('-', $parents_for_id)),
            '#ajax' => isset($element['#ajax']) ? $element['#ajax'] : NULL,
          );
        }
        if (isset($element['#options'][$key]['#weight'])) {
          $element[$key]['#weight'] = $element['#options'][$key]['#weight'];
        }
      }
    }
  }
  else {
    $element['#value'] = array();
  }
  return $element;
}