public function PreviewController::preview in Entity Embed 8

Returns a HTML response containing a preview of the text after filtering.

Applies all of the given text format's filters, not just the `entity_embed` filter, because for example `filter_align` and `filter_caption` may apply to it as well.

Parameters

\Symfony\Component\HttpFoundation\Request $request: The request object.

\Drupal\filter\FilterFormatInterface $filter_format: The text format.

Return value

\Symfony\Component\HttpFoundation\Response The filtered text.

Throws

\Symfony\Component\HttpKernel\Exception\NotFoundHttpException Throws an exception if 'text' parameter is not found in the request.

See also

\Drupal\editor\EditorController::getUntransformedText

1 string reference to 'PreviewController::preview'

entity_embed.routing.yml in ./entity_embed.routing.yml

entity_embed.routing.yml

File

src/Controller/PreviewController.php, line 64

Class

PreviewController

Controller which renders a preview of the provided text.

Namespace

Drupal\entity_embed\Controller

Code

public function preview(Request $request, FilterFormatInterface $filter_format) {
  $text = $request
    ->get('text');
  if ($text == '') {
    throw new NotFoundHttpException();
  }
  $build = [
    '#type' => 'processed_text',
    '#text' => $text,
    '#format' => $filter_format
      ->id(),
  ];
  $html = $this->renderer
    ->renderPlain($build);

  // Note that we intentionally do not use:
  // - \Drupal\Core\Cache\CacheableResponse because caching it on the server
  //   side is wasteful, hence there is no need for cacheability metadata.
  // - \Drupal\Core\Render\HtmlResponse because there is no need for
  //   attachments nor cacheability metadata.
  return (new Response($html))
    ->setPrivate()
    ->setMaxAge(300);
}