#3244002 Add multilingual fields to term edit form

src/Form/TaxonomyManagerForm.php

@@ -359,23 +359,59 @@ class TaxonomyManagerForm extends FormBase {
    * AJAX callback handler for the term data form.
    */
   public function termDataCallback($form, FormStateInterface $form_state) {
-    $taxonomy_term = $this->taxonomyTypeManager->load($form_state->getValue('load-term-data'));
+    $translatable = \Drupal::config('taxonomy_manager.settings')
+      ->get('taxonomy_manager_translations');
 
+    $taxonomy_term = $this->taxonomyTypeManager->load($form_state->getValue('load-term-data'));
     $term_form = $this->entityFormBuilder->getForm($taxonomy_term, 'default');
 
+    $fields = \Drupal::service('entity_field.manager')->getFieldDefinitions($taxonomy_term->getEntityTypeId(), $taxonomy_term->bundle());
+
     // Move the term data form into a fieldset.
     $term_form['fieldset']['#type'] = 'fieldset';
     $term_form['fieldset']['#title'] = Html::escape($taxonomy_term->getName()) . ' (' . $taxonomy_term->id() . ')';
     $term_form['fieldset']['#attributes'] = [];
+
     foreach (Element::children($term_form) as $key) {
       if ($key != 'fieldset') {
         $term_form['fieldset'][$key] = $term_form[$key];
+
+        if ($translatable && $key !== 'langcode' && isset($fields[$key])) {
+          if ($fields[$key]->isTranslatable()) {
+            $widget = array_shift($term_form['fieldset'][$key]['widget']);
+
+            foreach (\Drupal::service('language_manager')->getLanguages() as $langcode => $language) {
+              if (!$language->isDefault()) {
+                if ($taxonomy_term->hasTranslation($langcode)) {
+                  $data = $taxonomy_term->getTranslation($langcode)
+                    ->get($key)
+                    ->getValue();
+                  foreach ($data as $delta => $values) {
+                    if ($widget['#delta'] == $delta) {
+                      foreach ($values as $value_key => $value) {
+                        $widget['value']['#' . $value_key] = $value;
+                      }
+                    }
+                  }
+                }
+                else {
+                  $widget['value']['#value'] = '';
+                }
+                $widget['value']['#name'] = "taxonomy_manager_translations[" . $key . "][" . $langcode . "]";
+              }
+              $widget['value']['#title'] = $fields[$key]->getLabel() . " (" . $language->getName() . ")";
+              $term_form['fieldset'][$key]['widget'][$langcode] = $widget;
+            }
+          }
+        }
+
         unset($term_form[$key]);
       }
     }
 
     $term_form['#prefix'] = '<div id="taxonomy-term-data-form">';
     $term_form['#suffix'] = '</div>';
+
     $current_path = $this->currentPath->getPath();
     // Change the form action url form the current site to the add form.
     $term_form['#action'] = $this->urlGenerator