eca-1.0.x-dev/modules/form/src/Plugin/Action/FormFieldSetLabel.php

<?php

namespace Drupal\eca_form\Plugin\Action;

use Drupal\Core\Action\Attribute\Action;
use Drupal\Core\Form\FormStateInterface;
use Drupal\Core\StringTranslation\TranslatableMarkup;
use Drupal\eca\Attribute\EcaAction;

/**
 * Set label on a field or form element.
 */
#[Action(
  id: 'eca_form_field_set_label',
  label: new TranslatableMarkup('Form field: set label'),
  type: 'form',
)]
#[EcaAction(
  description: new TranslatableMarkup('Defines label on a form field or element.'),
  version_introduced: '2.1.0',
)]
class FormFieldSetLabel extends FormFieldActionBase {

  /**
   * Whether to use form field value filters or not.
   *
   * @var bool
   */
  protected bool $useFilters = FALSE;

  /**
   * {@inheritdoc}
   */
  protected function doExecute(): void {
    if ($element = &$this->getTargetElement()) {
      $element = &$this->jumpToFirstFieldChild($element);
      if ($element) {
        $label = trim((string) $this->tokenService->replaceClear($this->configuration['label']));
        if ($label !== '') {
          $element['#title'] = $label;
        }
      }
    }
  }

  /**
   * {@inheritdoc}
   */
  public function defaultConfiguration(): array {
    return [
      'label' => '',
    ] + parent::defaultConfiguration();
  }

  /**
   * {@inheritdoc}
   */
  public function buildConfigurationForm(array $form, FormStateInterface $form_state): array {
    $form['label'] = [
      '#type' => 'textfield',
      '#title' => $this->t('Element label'),
      '#description' => $this->t('The label of the form field or element.'),
      '#default_value' => $this->configuration['label'],
      '#weight' => -25,
      '#eca_token_replacement' => TRUE,
    ];
    return parent::buildConfigurationForm($form, $form_state);
  }

  /**
   * {@inheritdoc}
   */
  public function submitConfigurationForm(array &$form, FormStateInterface $form_state): void {
    $this->configuration['label'] = $form_state->getValue('label');
    parent::submitConfigurationForm($form, $form_state);
  }

}