ContentTranslationHandler::addTranslatabilityClue

protected ContentTranslationHandler::addTranslatabilityClue(&$element)

protected function addTranslatabilityClue(&$element) {
  static $suffix, $fapi_title_elements;

  // Elements which can have a #title attribute according to FAPI Reference.
  if (!isset($suffix)) {
    $suffix = ' <span class="translation-entity-all-languages">(' . t('all languages') . ')</span>';
    $fapi_title_elements = array_flip(array('checkbox', 'checkboxes', 'date', 'details', 'fieldset', 'file', 'item', 'password', 'password_confirm', 'radio', 'radios', 'select', 'text_format', 'textarea', 'textfield', 'weight'));
  }

  // Update #title attribute for all elements that are allowed to have a
  // #title attribute according to the Form API Reference. The reason for this
  // check is because some elements have a #title attribute even though it is
  // not rendered; for instance, field containers.
  if (isset($element['#type']) && isset($fapi_title_elements[$element['#type']]) && isset($element['#title'])) {
    $element['#title'] .= $suffix;
  }
  // If the current element does not have a (valid) title, try child elements.
  elseif ($children = Element::children($element)) {
    foreach ($children as $delta) {
      $this->addTranslatabilityClue($element[$delta], $suffix);
    }
  }
  // If there are no children, fall back to the current #title attribute if it
  // exists.
  elseif (isset($element['#title'])) {
    $element['#title'] .= $suffix;
  }
}