stanford_news.module

<?php

/**
 * @file
 * File description.
 *
 * Long description.
 */

use Drupal\panels\Plugin\DisplayVariant\PanelsDisplayVariant;

/**
 * Implements hook_panels_build_alter().
 */
function stanford_news_panels_build_alter(array &$build, PanelsDisplayVariant $panels_display) {
  $config = $panels_display->getConfiguration();
  switch ($config['storage_id']) {
    case 'node:stanford_news:full:default':
      $dom = new DOMDocument();
      // Disable error reports since <picture> tag throws errors.
      // @see https://stackoverflow.com/questions/6090667/php-domdocument-errors-warnings-on-html5-tags
      libxml_use_internal_errors(TRUE);
      $dom->loadHTML(render($build['hero']));

      // If the hero region has a _populated_ h1 tag, we dont want to render
      // the h1 in the layout.
      $h1_tags = $dom->getElementsByTagName('h1');
      if ($h1_tags->length && $h1_tags->item(0)->nodeValue && !empty($build['first'])) {
        // Find the node title block and unset it.
        foreach ($build['first'] as $uuid => $block) {
          if (is_array($block) && isset($block['#plugin_id']) && $block['#plugin_id'] == 'stanford_layouts_node_title') {
            unset($build['first'][$uuid]);
          }
        }
      }
      break;
  }
}