entity_print-8.x-2.2/modules/entity_print_views/src/Renderer/ViewRenderer.php

<?php

namespace Drupal\entity_print_views\Renderer;

use Drupal\Core\Entity\EntityInterface;
use Drupal\Core\Entity\EntityTypeInterface;
use Drupal\Core\Security\TrustedCallbackInterface;
use Drupal\entity_print\Renderer\RendererBase;
use Symfony\Component\DependencyInjection\ContainerInterface;

/**
 * Providers a renderer for Views.
 */
class ViewRenderer extends RendererBase implements TrustedCallbackInterface {

  /**
   * {@inheritdoc}
   */
  public static function createInstance(ContainerInterface $container, EntityTypeInterface $entity_type) {
    return new static(
      $container->get('renderer'),
      $container->get('entity_print.asset_renderer'),
      $container->get('entity_print.filename_generator'),
      $container->get('event_dispatcher')
    );
  }

  /**
   * {@inheritdoc}
   */
  public function render(array $views) {
    return array_map([$this, 'renderSingle'], $views);
  }

  /**
   * Render a single entity.
   *
   * @param \Drupal\Core\Entity\EntityInterface $view
   *   The entity we're rendering.
   *
   * @return array
   *   A render array.
   */
  protected function renderSingle(EntityInterface $view) {
    /** @var \Drupal\views\Entity\View $view */
    $executable = $view->getExecutable();
    $render = $executable->render() ?: [];

    // We must remove ourselves from all areas otherwise it will cause an
    // infinite loop when rendering.
    foreach (['header', 'footer', 'empty'] as $area_type) {
      $handlers = &$executable->display_handler->getHandlers($area_type);
      unset($handlers['area_entity_print_views']);
    }

    $render['#pre_render'][] = [static::class, 'preRender'];

    return $render;
  }

  /**
   * {@inheritdoc}
   */
  public function getFilename(array $entities) {
    return $this->filenameGenerator->generateFilename($entities, function ($view) {
      /** @var \Drupal\views\ViewEntityInterface $view */
      return $view->getExecutable()->getTitle();
    });
  }

  /**
   * Pre render callback for the view.
   */
  public static function preRender(array $element) {
    // Remove the exposed filters, we don't every want them on the PDF.
    $element['#exposed'] = [];
    return $element;
  }

  /**
   * {@inheritdoc}
   */
  public static function trustedCallbacks() {
    return ['preRender'];
  }

}