Bubbles Twig template argument's cacheability & attachment metadata.

For example: a generated link or generated URL object is passed as a Twig template argument, and its bubbleable metadata must be bubbled.

Parameters

mixed $arg: A Twig template argument that is about to be printed.

See also

\Drupal\Core\GeneratedLink

\Drupal\Core\GeneratedUrl

\Drupal\Core\Theme\ThemeManager::render()

\Drupal\Core\Render\RendererInterface::render()

2 calls to TwigExtension::bubbleArgMetadata()

TwigExtension::escapeFilter in core/lib/Drupal/Core/Template/TwigExtension.php

Overrides twig_escape_filter().

TwigExtension::renderVar in core/lib/Drupal/Core/Template/TwigExtension.php

Wrapper around render() for twig printed output.

File

core/lib/Drupal/Core/Template/TwigExtension.php, line 502

Class

TwigExtension

A class providing Drupal Twig extensions.

Namespace

Drupal\Core\Template

Code

protected function bubbleArgMetadata($arg) {
  // If it's a renderable, then it'll be up to the generated render array it
  // returns to contain the necessary cacheability & attachment metadata. If
  // it doesn't implement CacheableDependencyInterface or AttachmentsInterface
  // then there is nothing to do here.
  if ($arg instanceof RenderableInterface || !($arg instanceof CacheableDependencyInterface || $arg instanceof AttachmentsInterface)) {
    return;
  }
  $arg_bubbleable = [];
  BubbleableMetadata::createFromObject($arg)->applyTo($arg_bubbleable);
  $this->renderer
    ->render($arg_bubbleable);
}

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