--- /dev/null
+<?php
+
+namespace Drupal\{{ machine_name }}\Plugin\Field\FieldWidget;
+
+use Drupal\Core\Field\FieldItemListInterface;
+use Drupal\Core\Field\WidgetBase;
+use Drupal\Core\Form\FormStateInterface;
+
+/**
+ * Defines the '{{ plugin_id }}' field widget.
+ *
+ * @FieldWidget(
+ * id = "{{ plugin_id }}",
+ * label = @Translation("{{ plugin_label }}"),
+ * field_types = {"string"},
+ * )
+ */
+class {{ class }} extends WidgetBase {
+
+ /**
+ * {@inheritdoc}
+ */
+ public static function defaultSettings() {
+ return [
+ 'size' => 60,
+ 'placeholder' => '',
+ 'prefix' => '',
+ 'suffix' => '',
+ ] + parent::defaultSettings();
+ }
+
+ /**
+ * {@inheritdoc}
+ */
+ public function settingsForm(array $form, FormStateInterface $form_state) {
+ $settings = $this->getSettings();
+
+ $element['size'] = [
+ '#type' => 'number',
+ '#title' => $this->t('Size of textfield'),
+ '#default_value' => $settings['size'],
+ '#required' => TRUE,
+ '#min' => 1,
+ ];
+ $element['placeholder'] = [
+ '#type' => 'textfield',
+ '#title' => $this->t('Placeholder'),
+ '#default_value' => $settings['placeholder'],
+ '#description' => $this->t('Text that will be shown inside the field until a value is entered. This hint is usually a sample value or a brief description of the expected format.'),
+ ];
+ $element['prefix'] = [
+ '#type' => 'textfield',
+ '#title' => $this->t('Prefix'),
+ '#default_value' => $settings['prefix'],
+ ];
+ $element['suffix'] = [
+ '#type' => 'textfield',
+ '#title' => $this->t('Suffix'),
+ '#default_value' => $settings['suffix'],
+ ];
+
+ return $element;
+ }
+
+ /**
+ * {@inheritdoc}
+ */
+ public function settingsSummary() {
+ $settings = $this->getSettings();
+ $summary[] = $this->t('Textfield size: @size', ['@size' => $settings['size']]);
+
+ if ($settings['placeholder']) {
+ $summary[] = $this->t('Placeholder: @placeholder', ['@placeholder' => $settings['placeholder']]);
+ }
+ if ($settings['prefix']) {
+ $summary[] = $this->t('Prefix: @prefix', ['@prefix' => $settings['prefix']]);
+ }
+ if ($settings['suffix']) {
+ $summary[] = $this->t('Suffix: @suffix', ['@suffix' => $settings['suffix']]);
+ }
+
+ return $summary;
+ }
+
+ /**
+ * {@inheritdoc}
+ */
+ public function formElement(FieldItemListInterface $items, $delta, array $element, array &$form, FormStateInterface $form_state) {
+
+ $settings = $this->getSettings();
+ $element['value'] = $element + [
+ '#type' => 'textfield',
+ '#default_value' => isset($items[$delta]->value) ? $items[$delta]->value : NULL,
+ '#size' => $settings['size'],
+ '#placeholder' => $settings['placeholder'],
+ '#maxlength' => $this->getFieldSetting('max_length'),
+ '#field_prefix' => $settings['prefix'],
+ '#field_suffix' => $settings['suffix'],
+ ];
+
+ return $element;
+ }
+
+}