RemovePageThemeWrapperSubscriber.php in Acquia Content Hub 8

Namespace

Drupal\acquia_contenthub\EventSubscriber\View

File

src/EventSubscriber/View/RemovePageThemeWrapperSubscriber.php

<?php

namespace Drupal\acquia_contenthub\EventSubscriber\View;

use Drupal\Core\EventSubscriber\MainContentViewSubscriber;
use Symfony\Component\HttpKernel\Event\GetResponseForControllerResultEvent;
use Symfony\Component\HttpKernel\KernelEvents;

/**
 * Subscriber to Remove Page Theme Wrapper.
 *
 * @package Drupal\acquia_contenthub\EventSubscriber\View
 */
class RemovePageThemeWrapperSubscriber extends MainContentViewSubscriber {

  /**
   * Interact with onViewRenderArray event.
   *
   * @return array
   *   Subscribed events.
   */
  public static function getSubscribedEvents() {
    $events = [];
    $events[KernelEvents::VIEW][] = [
      'onViewRenderArray',
      10,
    ];
    return $events;
  }

  /**
   * Modifies render array for D8.
   *
   * @param \Symfony\Component\HttpKernel\Event\GetResponseForControllerResultEvent $event
   *   Controller result event.
   */
  public function onViewRenderArray(GetResponseForControllerResultEvent $event) {
    $request = $event
      ->getRequest();
    if ($request->attributes
      ->all()['_route'] === 'acquia_contenthub.content_entity_display.entity') {
      parent::onViewRenderArray($event);
      $event
        ->getResponse()
        ->setContent(self::removeSurroundingMarkup('dialog-off-canvas-main-canvas', $event
        ->getResponse()
        ->getContent()));
    }
  }

  /**
   * Removes surrounding markup for html string.
   *
   * @param \Drupal\acquia_contenthub\EventSubscriber\View\string $class_selector
   *   Selector for DOM modification.
   * @param \Drupal\acquia_contenthub\EventSubscriber\View\string $input
   *   HTML to modify.
   *
   * @return string
   *   Modified HTML.
   */
  private static function removeSurroundingMarkup(string $class_selector, string $input) : string {
    $doc = new \DOMDocument();
    $doc->preserveWhiteSpace = FALSE;
    $encoded_input = mb_convert_encoding($input, 'HTML-ENTITIES', "UTF-8");
    @$doc
      ->loadHTML($encoded_input);
    $entries = (new \DOMXPath($doc))
      ->query("//div[contains(concat(' ', normalize-space(@class), ' '), ' {$class_selector} ')]");
    foreach ($entries as $node) {
      if (!$node->parentNode) {
        continue;
      }
      $child_nodes = [];
      foreach ($node->childNodes as $ch_node) {
        $child_nodes[] = $ch_node;
      }
      foreach ($child_nodes as $ch_node) {
        $node->parentNode
          ->insertBefore($ch_node, $node);
      }
      $node->parentNode
        ->removeChild($node);
    }
    return $doc
      ->saveHTML();
  }

}

Classes

Name	Description
RemovePageThemeWrapperSubscriber	Subscriber to Remove Page Theme Wrapper.