function webp_preprocess_responsive_image in WebP 8

Implements template_preprocess_responsive_image().

File

./webp.module, line 29

Contains webp.module.

Code

function webp_preprocess_responsive_image(&$variables) {
  $webp_sources = [];
  if (isset($variables['sources'])) {
    foreach ($variables['sources'] as $source) {

      /** @var \Drupal\Core\Template\Attribute $source */

      // Blazy module is using another srcset attribute.
      $srcset_attribute_key = FALSE;
      if ($source
        ->offsetExists('data-srcset')) {
        $srcset_attribute_key = 'data-srcset';
      }
      elseif ($source
        ->offsetExists('srcset')) {
        $srcset_attribute_key = 'srcset';
      }
      if ($srcset_attribute_key !== FALSE) {
        $srcset_orig = $source
          ->offsetGet($srcset_attribute_key)
          ->value();

        /* @var \Drupal\webp\Webp $webp */
        $webp = \Drupal::service('webp.webp');
        $webp_srcset = $webp
          ->getWebpSrcset($srcset_orig);

        // Create a new source pointing to the webp URL.
        $webp_source = clone $source;
        $webp_source
          ->offsetSet($srcset_attribute_key, $webp_srcset);
        $webp_source
          ->offsetSet('type', 'image/webp');
        $webp_sources[] = $webp_source;
      }
    }

    // Add the new sources at the top of the list.
    $variables['sources'] = array_merge($webp_sources, $variables['sources']);

    // Never output a single image tag, because
    // we will always have at least two sources.
    $variables['output_image_tag'] = FALSE;
  }
}