public function FilterImageLinkToSource::process in Image Resize Filter 8

Performs the filter processing.

Parameters

string $text: The text string to be filtered.

string $langcode: The language code of the text to be filtered.

Return value

\Drupal\filter\FilterProcessResult The filtered text, wrapped in a FilterProcessResult object, and possibly with associated assets, cacheability metadata and placeholders.

Overrides FilterInterface::process

See also

\Drupal\filter\FilterProcessResult

File

src/Plugin/Filter/FilterImageLinkToSource.php, line 25

Class

FilterImageLinkToSource

Provides a filter to link images derivates to source (original) image.

Namespace

Drupal\image_resize_filter\Plugin\Filter

Code

public function process($text, $langcode) {
  $result = new FilterProcessResult($text);
  $dom = Html::load($text);
  $xpath = new \DOMXPath($dom);

  /** @var \DOMNode $node */
  foreach ($xpath
    ->query('//img') as $node) {

    // Read the data-align attribute's value, then delete it.
    $width = $node
      ->getAttribute('width');
    $height = $node
      ->getAttribute('height');
    $src = $node
      ->getAttribute('src');
    if (!UrlHelper::isExternal($src)) {
      if ($width || $height) {

        /** @var \DOMNode $element */
        $element = $dom
          ->createElement('a');
        $element
          ->setAttribute('href', $src);
        $node->parentNode
          ->replaceChild($element, $node);
        $element
          ->appendChild($node);
      }
    }
  }
  $result
    ->setProcessedText(Html::serialize($dom));
  return $result;
}