page_layouts-1.0.1/src/Plugin/views/style/PageLayoutStyle.php

<?php

namespace Drupal\page_layouts\Plugin\views\style;

use Drupal\core\form\FormStateInterface;
use Drupal\Core\StringTranslation\StringTranslationTrait;
use Drupal\views\Plugin\views\style\StylePluginBase;

/**
 * Style plugin to render a list layouts.
 *
 * @ingroup views_style_plugins
 *
 * @ViewsStyle(
 *   id = "page_layouts_style",
 *   title = @Translation("Page Layout"),
 *   help = @Translation("Render a list of page layout plugins."),
 *   theme = "views_view_page_layouts",
 *   display_types = { "normal" }
 * )
 */
class PageLayoutStyle extends StylePluginBase {
  use StringTranslationTrait;

  /**
   * Set default options.
   */
  protected function defineOptions() {
    $options = parent::defineOptions();
    return $options;
  }

  /**
   * {@inheritdoc}
   */
  public function buildOptionsForm(&$form, FormStateInterface $form_state) {
    parent::buildOptionsForm($form, $form_state);

    // Extra CSS classes.
    $form['classes'] = [
      '#type' => 'textfield',
      '#title' => $this->t('CSS classes'),
      '#default_value' => (isset($this->options['classes'])) ? $this->options['classes'] : 'view-page-layouts',
      '#description' => $this->t('CSS classes for further customization of this page.'),
    ];
  }

}