core/modules/big_pipe/big_pipe.module


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<?php

/**
 * @file
 */

/**
 * Implements hook_theme_suggestions_HOOK().
 */
function big_pipe_theme_suggestions_big_pipe_interface_preview(array $variables): array {
  $common_callbacks_simplified_suggestions = [
    'Drupal_block_BlockViewBuilder__lazyBuilder' => 'block',
  ];

  $suggestions = [];
  $suggestion = 'big_pipe_interface_preview';
  if ($variables['callback']) {
    $callback = preg_replace('/[^a-zA-Z0-9]/', '_', $variables['callback']);
    if (is_array($callback)) {
      $callback = implode('__', $callback);
    }

    // Use simplified template suggestion, if any.
    // For example, this simplifies
    // big-pipe-interface-preview--Drupal-block-BlockViewBuilder--lazyBuilder--<BLOCK ID>.html.twig
    // to
    // big-pipe-interface-preview--block--<BLOCK ID>.html.twig
    if (isset($common_callbacks_simplified_suggestions[$callback])) {
      $callback = $common_callbacks_simplified_suggestions[$callback];
    }

    $suggestions[] = $suggestion .= '__' . $callback;
    if (is_array($variables['arguments'])) {
      $arguments = preg_replace('/[^a-zA-Z0-9]/', '_', $variables['arguments']);
      foreach ($arguments as $argument) {
        if (empty($argument)) {
          continue;
        }
        $suggestions[] = $suggestion . '__' . $argument;
      }
    }
  }
  return $suggestions;
}