Issue #3456083 by just_like_good_vibes: Add text format trusted callback to WysiwygWidget source

src/Plugin/UiPatterns/Source/WysiwygWidget.php

@@ -5,6 +5,7 @@ declare(strict_types=1);
 namespace Drupal\ui_patterns\Plugin\UiPatterns\Source;
 
 use Drupal\Core\Form\FormStateInterface;
+use Drupal\Core\Security\TrustedCallbackInterface;
 use Drupal\ui_patterns\SourcePluginBase;
 
 /**
@@ -20,7 +21,36 @@ use Drupal\ui_patterns\SourcePluginBase;
  *   tags = { "widget" }
  * )
  */
-class WysiwygWidget extends SourcePluginBase {
+class WysiwygWidget extends SourcePluginBase implements TrustedCallbackInterface {
+
+  /**
+   * {@inheritdoc}
+   */
+  public static function trustedCallbacks() {
+    return ['textFormat'];
+  }
+
+  /**
+   * Customize the text_format element.
+   */
+  public static function textFormat($element) {
+    if (!isset($element['format']['format']['#access']) ||
+      $element['format']['format']['#access']) {
+      return $element;
+    }
+    // See code at Drupal\filter\Element\TextFormat::processTextFormat()
+    // when the format is not accessible, we need to make it accessible.
+    $element['format']['format']['#access'] = TRUE;
+    $config = \Drupal::configFactory()->get('filter.settings');
+    $fallback_format = $config->get('fallback_format');
+    $formats = filter_formats();
+    // We add the fallback format to the list of options if removed.
+    if (array_key_exists($fallback_format, $formats)
+      && !array_key_exists($fallback_format, $element['format']['format']['#options'])) {
+      $element['format']['format']['#options'][$fallback_format] = $formats[$fallback_format]->label();
+    }
+    return $element;
+  }
 
   /**
    * {@inheritdoc}
@@ -49,13 +79,18 @@ class WysiwygWidget extends SourcePluginBase {
    * {@inheritdoc}
    */
   public function settingsForm(array $form, FormStateInterface $form_state): array {
-    return [
-      'value' => [
-        '#type' => 'text_format',
-        '#default_value' => $this->getSetting('value')['value'],
-        '#format' => $this->getSetting('value')['format'],
-      ],
+    $value = $this->getSetting('value');
+    $element = [
+      '#type' => 'text_format',
     ];
+    if (is_array($value) && array_key_exists("value", $value)) {
+      $element['#default_value'] = $value['value'];
+    }
+    if (is_array($value) && array_key_exists("format", $value)) {
+      $element['#format'] = $value['format'];
+    }
+    $element['#pre_render'] = [[static::class, 'textFormat']];
+    return ['value' => $element];
   }
 
 }