public function BlockComponentRenderArraySubscriber::onBuildRender in Layout Builder Styles 8

Add each component's block styles to the render array.

Parameters

\Drupal\layout_builder\Event\SectionComponentBuildRenderArrayEvent $event: The section component render event.

File

src/EventSubscriber/BlockComponentRenderArraySubscriber.php, line 59

Class

BlockComponentRenderArraySubscriber

Class BlockComponentRenderArraySubscriber.

Namespace

Drupal\layout_builder_styles\EventSubscriber

Code

public function onBuildRender(SectionComponentBuildRenderArrayEvent $event) {
  $build = $event
    ->getBuild();

  // This shouldn't happen - Layout Builder should have already created the
  // initial build data.
  if (empty($build)) {
    return;
  }
  $selectedStyles = $event
    ->getComponent()
    ->get('layout_builder_styles_style');
  if ($selectedStyles) {

    // Convert single selection to an array for consistent processing.
    if (!is_array($selectedStyles)) {
      $selectedStyles = [
        $selectedStyles,
      ];
    }

    // Pass the selected style(s) to the render array so we can use the data
    // when adding block theme suggestions.
    // See layout_builder_styles_theme_suggestions_block_alter().
    $build['#layout_builder_style'] = $selectedStyles;

    // Retrieve all styles from selection(s).
    $grouped_classes = [];
    if (!isset($build['#attributes']['class']) || !is_array($build['#attributes']['class'])) {
      $build['#attributes']['class'] = [];
    }
    foreach ($selectedStyles as $styleId) {

      // Account for incorrectly configured component configuration which may
      // have a NULL style ID. We cannot pass NULL to the storage handler or
      // it will throw an exception.
      if (empty($styleId)) {
        continue;
      }

      /** @var \Drupal\layout_builder_styles\LayoutBuilderStyleInterface $style */
      $style = $this->entityTypeManager
        ->getStorage('layout_builder_style')
        ->load($styleId);
      if ($style) {
        $classes = \preg_split('(\\r\\n|\\r|\\n)', $style
          ->getClasses());
        $grouped_classes = array_merge($grouped_classes, $classes);
        $build['#attributes']['class'] = array_merge($build['#attributes']['class'], $grouped_classes);
        $build['#cache']['tags'][] = 'config:layout_builder_styles.style.' . $style
          ->id();
      }
    }
    $event
      ->setBuild($build);
  }
}