oe_editorial.module

<?php

/**
 * @file
 * OpenEuropa Editorial module.
 */

declare(strict_types = 1);

use Drupal\Core\Form\FormStateInterface;
use Drupal\Core\Url;

/**
 * Implements hook_element_info_alter().
 *
 * Add a custom process method to the TextFormat form element.
 */
function oe_editorial_element_info_alter(array &$types) {
  if (isset($types['text_format'])) {
    $types['text_format']['#process'][] = "_oe_editorial_alter_text_format_help";
  }
}

/**
 * After build callback to alter the Url of the help link on text areas.
 */
function _oe_editorial_alter_text_format_help(&$element, FormStateInterface $form_state, &$complete_form) {

  // Replace the format help links with custom ones that point to
  // the appropriate help page.
  if (isset($element['format']['format'])) {
    // Apply custom class to text format select field.
    $element['format']['format']['#attributes']['class'][] = 'text-format-filter-list';

    foreach ($element['format']['format']['#options'] as $allowed_format_id => $allowed_format_name) {
      // We add one link for each of the available format types.
      $element['format']['help'][$allowed_format_id] = [
        '#type' => 'link',
        '#title' => t('About the :format_name format', [':format_name' => $allowed_format_name]),
        '#url' => Url::fromRoute('filter.tips', ['filter_format' => $allowed_format_id]),
        '#attributes' => [
          'class' => [
            'filter-help-item',
            'filter-help-' . $allowed_format_id,
          ],
          'target' => '_blank',
        ],
      ];
    }
    // Remove the default static link.
    unset($element['format']['help']['about']);
    $element['format']['help']['#attached']['library'][] = 'oe_editorial/help';
  }

  // Remove the guidelines area.
  if (isset($element['format']['guidelines'])) {
    unset($element['format']['guidelines']);
  }
  return $element;
}