Include element defaults in PatternLayout so pattern layouts render properly in panels

modules/ui_patterns_layouts/src/Plugin/Layout/PatternLayout.php

@@ -8,6 +8,7 @@ use Drupal\Core\Layout\LayoutDefinition;
 use Drupal\Core\Plugin\ContainerFactoryPluginInterface;
 use Drupal\Core\Plugin\PluginFormInterface;
 use Drupal\ui_patterns\UiPatternsManager;
+use Drupal\Core\Render\ElementInfoManagerInterface;
 use Symfony\Component\DependencyInjection\ContainerInterface;
 
 /**
@@ -24,6 +25,13 @@ class PatternLayout extends LayoutDefault implements PluginFormInterface, Contai
    */
   protected $patternManager = NULL;
 
+  /**
+   * The element info.
+   *
+   * @var \Drupal\Core\Render\ElementInfoManagerInterface
+   */
+  protected $elementInfo;
+
   /**
    * Constructs a LocalActionDefault object.
    *
@@ -36,8 +44,9 @@ class PatternLayout extends LayoutDefault implements PluginFormInterface, Contai
    * @param \Drupal\ui_patterns\UiPatternsManager $pattern_manager
    *    Pattern manager service.
    */
-  public function __construct(array $configuration, $plugin_id, LayoutDefinition $plugin_definition, UiPatternsManager $pattern_manager) {
+  public function __construct(array $configuration, $plugin_id, LayoutDefinition $plugin_definition, ElementInfoManagerInterface $element_info, UiPatternsManager $pattern_manager) {
     parent::__construct($configuration, $plugin_id, $plugin_definition);
+    $this->elementInfo = $element_info;
     $this->patternManager = $pattern_manager;
   }
 
@@ -49,6 +58,7 @@ class PatternLayout extends LayoutDefault implements PluginFormInterface, Contai
       $configuration,
       $plugin_id,
       $plugin_definition,
+      $container->get('plugin.manager.element_info'),
       $container->get('plugin.manager.ui_patterns')
     );
   }
@@ -74,7 +84,7 @@ class PatternLayout extends LayoutDefault implements PluginFormInterface, Contai
       '#type' => 'pattern',
       '#id' => $this->getPluginDefinition()->get('additional')['pattern'],
       '#fields' => $fields,
-    ];
+    ] + $this->elementInfo->getInfo('pattern');
   }
 
   /**