Fixed widget

Author: pookmish

src/Plugin/Field/FieldWidget/LayoutLibraryIconsWidget.php

@@ -22,6 +22,7 @@
   id: 'layout_library_icons',
   label: new TranslatableMarkup('Layout Library Icons'),
   field_types: ['entity_reference'],
+  multiple_values: TRUE,
 )]
 class LayoutLibraryIconsWidget extends OptionsWidgetBase {
 
@@ -57,11 +58,19 @@ public static function create(ContainerInterface $container, array $configuratio
     );
   }
 
+  /**
+   * {@inheritdoc}
+   */
+  public static function isApplicable(FieldDefinitionInterface $field_definition) {
+    return $field_definition->getName() == 'layout_selection';
+  }
+
   /**
    * {@inheritdoc}
    */
   public function formElement(FieldItemListInterface $items, $delta, array $element, array &$form, FormStateInterface $form_state) {
     $element = parent::formElement($items, $delta, $element, $form, $form_state);
+
     $options = $this->getOptions($items->getEntity());
     /** @var \Drupal\layout_library\Entity\Layout[] $layouts */
     $layouts = $this->entityTypeManager->getStorage('layout')
@@ -93,10 +102,11 @@ public function formElement(FieldItemListInterface $items, $delta, array $elemen
       $options['_none'] .= $this->renderer->render($image);
     }
 
+    $selectedOption = $this->getSelectedOptions($items);
     $element += [
       '#type' => 'radios',
       '#options' => $options,
-      '#default_value' => $this->getSelectedOptions($items) ?: '_none',
+      '#default_value' => $selectedOption[0] ?? '_none',
       '#attached' => ['library' => ['stanford_profile_helper/layout_library_icon_widget']],
       '#attributes' => ['class' => ['layout-library-icons']],
     ];

tests/src/Unit/Plugin/Field/FieldWidget/LayoutLibraryIconsWidgetTest.php

@@ -158,7 +158,7 @@ public function getOptions($entity = NULL) {
         ];
       }
       public function getSelectedOptions(FieldItemListInterface $items, $delta = 0) {
-        return 'layout_1';
+        return ['layout_1'];
       }
     };
     $widget->setStringTranslation($this->translation);
@@ -189,7 +189,7 @@ public function testGetEmptyLabel() {
     $reflection = new \ReflectionClass($this->widget);
     $method = $reflection->getMethod('getEmptyLabel');
     $method->setAccessible(TRUE);
-    
+
     $label = $method->invoke($this->widget);
     $this->assertInstanceOf(TranslatableMarkup::class, $label);
     // Check the untranslated string.