function ContentTranslationHooks::formAlter

Implements hook_form_alter().

Attributes

File

core/modules/content_translation/src/Hook/ContentTranslationHooks.php, line 353

Class

ContentTranslationHooks

Hook implementations for content_translation.

Namespace

Code

public function formAlter(array &$form, FormStateInterface $form_state) : void {
  $form_object = $form_state->getFormObject();
  if (!$form_object instanceof ContentEntityFormInterface) {
    return;
  }
  $entity = $form_object->getEntity();
  $op = $form_object->getOperation();
  // Let the content translation handler alter the content entity form. This
  // can be the 'add' or 'edit' form. It also tries a 'default' form in case
  // neither of the aforementioned forms are defined.
  if ($entity instanceof ContentEntityInterface && $entity->isTranslatable() && count($entity->getTranslationLanguages()) > 1 && in_array($op, [
    'edit',
    'add',
    'default',
  ], TRUE)) {
    $controller = \Drupal::entityTypeManager()->getHandler($entity->getEntityTypeId(), 'translation');
    $controller->entityFormAlter($form, $form_state, $entity);
    // @todo Move the following lines to the code generating the property form
    //   elements once we have an official #multilingual FAPI key.
    $translations = $entity->getTranslationLanguages();
    $form_langcode = $form_object->getFormLangcode($form_state);
    // Handle fields shared between translations when there is at least one
    // translation available or a new one is being created.
    if (!$entity->isNew() && (!isset($translations[$form_langcode]) || count($translations) > 1)) {
      foreach ($entity->getFieldDefinitions() as $field_name => $definition) {
        // Allow the widget to define if it should be treated as multilingual
        // by respecting an already set #multilingual key.
        if (isset($form[$field_name]) && !isset($form[$field_name]['#multilingual'])) {
          $form[$field_name]['#multilingual'] = $definition->isTranslatable();
        }
      }
    }
    // The footer region, if defined, may contain multilingual widgets so we
    // need to always display it.
    if (isset($form['footer'])) {
      $form['footer']['#multilingual'] = TRUE;
    }
  }
}