ViewsReferenceSelectWidget.php in Views Reference Field 8

Namespace

Drupal\viewsreference\Plugin\Field\FieldWidget

File

src/Plugin/Field/FieldWidget/ViewsReferenceSelectWidget.php

<?php

namespace Drupal\viewsreference\Plugin\Field\FieldWidget;

use Drupal\Core\Field\FieldItemListInterface;
use Drupal\Core\Field\Plugin\Field\FieldWidget\OptionsSelectWidget;
use Drupal\Core\Form\FormStateInterface;

/**
 * Plugin implementation of the 'options_select' widget.
 *
 * @FieldWidget(
 *   id = "viewsreference_select",
 *   label = @Translation("Views Reference Select list"),
 *   description = @Translation("An autocomplete views select list field."),
 *   field_types = {
 *     "viewsreference"
 *   }
 * )
 */
class ViewsReferenceSelectWidget extends OptionsSelectWidget {
  use ViewsReferenceTrait;

  /**
   * {@inheritdoc}
   */
  protected function getEmptyLabel() {
  }

  /**
   * {@inheritdoc}
   */
  public function formElement(FieldItemListInterface $items, $delta, array $element, array &$form, FormStateInterface $form_state) {
    $select_element['target_id'] = parent::formElement($items, $delta, $element, $form, $form_state);
    $select_element = $this
      ->fieldElement($select_element, $items, $delta);
    $select_element['target_id']['#multiple'] = FALSE;
    if (!$this
      ->isDefaultValueWidget($form_state)) {
      $selected_views = $items
        ->getSetting('preselect_views');
      $selected_views = array_diff($selected_views, [
        "0",
      ]);
      $selected_views = $this
        ->getViewNames($selected_views);
      if (count($selected_views) >= 1) {
        $first_option = [
          $this
            ->t("- None -"),
        ];
        $select_element['target_id']['#options'] = array_merge($first_option, $selected_views);
      }
      else {
        $select_element['target_id']['#empty_option'] = $this
          ->t('- None -');
      }
    }
    return $select_element;
  }

  /**
   * {@inheritdoc}
   */
  public function massageFormValues(array $values, array $form, FormStateInterface $form_state) {

    // Options creates an array which we need to flatten.
    $values = $this
      ->massageValues($values, $form, $form_state);
    return $values;
  }

}

Classes

Name	Description
ViewsReferenceSelectWidget	Plugin implementation of the 'options_select' widget.