LCH-3652 | Remove extra container dialog-off-canvas-main-canvas.

    tags:

      - { name: event_subscriber }

  acquia_contenthub.page.theme_wrapper.view_subscriber:

    class: Drupal\acquia_contenthub\EventSubscriber\View\RemovePageThemeWrapperSubscriber

    arguments: ['@class_resolver', '@current_route_match', '%main_content_renderers%']

    tags:

      - { name: event_subscriber }

  cache.acquia_contenthub:

    class: Drupal\Core\Cache\CacheBackendInterface

    tags:

<?php

namespace Drupal\acquia_contenthub\EventSubscriber\View;

use Drupal\Core\EventSubscriber\MainContentViewSubscriber;

use Symfony\Component\HttpKernel\Event\GetResponseForControllerResultEvent;

use Symfony\Component\HttpKernel\KernelEvents;

class RemovePageThemeWrapperSubscriber extends MainContentViewSubscriber {

  public static function getSubscribedEvents() {

    $events = [];

    $events[KernelEvents::VIEW][] = ['onViewRenderArray', 10];

    return $events;

  }

  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())

      );

    }

  }

  private static function removeSurroundingMarkup(string $class_selector, string $input): string {

    $doc = new \DOMDocument();

    $doc->preserveWhiteSpace = FALSE;

    $doc->loadHTML($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();

  }

}