--- /dev/null
+<?php
+
+namespace Drupal\text\Plugin\Field\FieldWidget;
+
+use Drupal\Core\Field\FieldItemListInterface;
+use Drupal\Core\Field\Plugin\Field\FieldWidget\StringTextfieldWidget;
+use Drupal\Core\Form\FormStateInterface;
+use Symfony\Component\Validator\ConstraintViolationInterface;
+
+/**
+ * Plugin implementation of the 'text_textfield' widget.
+ *
+ * @FieldWidget(
+ * id = "text_textfield",
+ * label = @Translation("Text field"),
+ * field_types = {
+ * "text"
+ * },
+ * )
+ */
+class TextfieldWidget extends StringTextfieldWidget {
+
+ /**
+ * {@inheritdoc}
+ */
+ public function formElement(FieldItemListInterface $items, $delta, array $element, array &$form, FormStateInterface $form_state) {
+ $main_widget = parent::formElement($items, $delta, $element, $form, $form_state);
+
+ $element = $main_widget['value'];
+ $element['#type'] = 'text_format';
+ $element['#format'] = isset($items[$delta]->format) ? $items[$delta]->format : NULL;
+ $element['#base_type'] = $main_widget['value']['#type'];
+ return $element;
+ }
+
+ /**
+ * {@inheritdoc}
+ */
+ public function errorElement(array $element, ConstraintViolationInterface $violation, array $form, FormStateInterface $form_state) {
+ if ($violation->arrayPropertyPath == ['format'] && isset($element['format']['#access']) && !$element['format']['#access']) {
+ // Ignore validation errors for formats if formats may not be changed,
+ // i.e. when existing formats become invalid. See filter_process_format().
+ return FALSE;
+ }
+ return $element;
+ }
+
+}