function CompositeFormElementTrait::preRenderCompositeFormElement

Adds form element theming to an element if its title or description is set.

This is used as a pre render function for checkboxes and radios.

File

core/lib/Drupal/Core/Render/Element/CompositeFormElementTrait.php, line 18

Class

CompositeFormElementTrait

Provides a trait for radios, checkboxes, and similar composite form elements.

Namespace

Code

public static function preRenderCompositeFormElement($element) {
  // Set the element's title attribute to show #title as a tooltip, if needed.
  if (isset($element['#title']) && $element['#title_display'] == 'attribute') {
    $element['#attributes']['title'] = $element['#title'];
    if (!empty($element['#required'])) {
      // Append an indication that this field is required.
      $element['#attributes']['title'] .= ' (' . t('Required') . ')';
    }
  }
  if (isset($element['#title']) || isset($element['#description'])) {
    // @see #type 'fieldgroup'
    $element['#attributes']['id'] = $element['#id'] . '--wrapper';
    $element['#theme_wrappers'][] = 'fieldset';
    $element['#attributes']['class'][] = 'fieldgroup';
    $element['#attributes']['class'][] = 'form-composite';
  }
  return $element;
}