function ContentTranslationHandler::entityFormSharedElements

Process callback: determines which elements get clue in the form.

See also

\Drupal\content_translation\ContentTranslationHandler::entityFormAlter()

File

core/modules/content_translation/src/ContentTranslationHandler.php, line 594

Class

ContentTranslationHandler

Base class for content translation handlers.

Namespace

Code

public function entityFormSharedElements($element, FormStateInterface $form_state, $form) {
    static $ignored_types;
    // @todo Find a more reliable way to determine if a form element concerns a
    //   multilingual value.
    if (!isset($ignored_types)) {
        $ignored_types = array_flip([
            'actions',
            'value',
            'hidden',
            'vertical_tabs',
            'token',
            'details',
            'link',
        ]);
    }
    
    /** @var \Drupal\Core\Entity\ContentEntityForm $form_object */
    $form_object = $form_state->getFormObject();
    
    /** @var \Drupal\Core\Entity\ContentEntityInterface $entity */
    $entity = $form_object->getEntity();
    $display_translatability_clue = !$entity->isDefaultTranslationAffectedOnly();
    $hide_untranslatable_fields = $entity->isDefaultTranslationAffectedOnly() && !$entity->isDefaultTranslation();
    $translation_form = $form_state->get([
        'content_translation',
        'translation_form',
    ]);
    $display_warning = FALSE;
    // We use field definitions to identify untranslatable field widgets to be
    // hidden. Fields that are not involved in translation changes checks should
    // not be affected by this logic (the "revision_log" field, for instance).
    $field_definitions = array_diff_key($entity->getFieldDefinitions(), array_flip($this->getFieldsToSkipFromTranslationChangesCheck($entity)));
    foreach (Element::children($element) as $key) {
        if (!isset($element[$key]['#type'])) {
            $this->entityFormSharedElements($element[$key], $form_state, $form);
        }
        else {
            // Ignore non-widget form elements.
            if (isset($ignored_types[$element[$key]['#type']])) {
                continue;
            }
            // Elements are considered to be non multilingual by default.
            if (empty($element[$key]['#multilingual'])) {
                // If we are displaying a multilingual entity form we need to provide
                // translatability clues, otherwise the non-multilingual form elements
                // should be hidden.
                if (!$translation_form) {
                    if ($display_translatability_clue) {
                        $this->addTranslatabilityClue($element[$key]);
                    }
                    // Hide widgets for untranslatable fields.
                    if ($hide_untranslatable_fields && isset($field_definitions[$key])) {
                        $element[$key]['#access'] = FALSE;
                        $display_warning = TRUE;
                    }
                }
                else {
                    $element[$key]['#access'] = FALSE;
                }
            }
        }
    }
    if ($display_warning) {
        $url = $entity->getUntranslated()
            ->toUrl('edit-form')
            ->toString();
        $message['warning'][] = $this->t('Fields that apply to all languages are hidden to avoid conflicting changes. <a href=":url">Edit them on the original language form</a>.', [
            ':url' => $url,
        ]);
        // Explicitly renders this warning message. This prevents repetition on
        // AJAX operations or form submission. Other messages will be rendered in
        // the default location.
        // @see \Drupal\Core\Render\Element\StatusMessages.
        $element['hidden_fields_warning_message'] = [
            '#theme' => 'status_messages',
            '#message_list' => $message,
            '#weight' => -100,
            '#status_headings' => [
                'warning' => $this->t('Warning message'),
            ],
        ];
    }
    return $element;
}