function content_translation_form_alter

Implements hook_form_alter().

File

core/modules/content_translation/content_translation.module, line 386

Allows entities to be translated into different languages.

Code

function content_translation_form_alter(array &$form, FormStateInterface $form_state) {
  $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;
    }
  }
}