protected function BlockComponentPreviewFormReplace::convertFormsToDiv in Dashboards with Layout Builder 8

Convert form tags to div when displayed in the Layout Builder UI form.

Parameters

array $content: The render array of the block.

1 call to BlockComponentPreviewFormReplace::convertFormsToDiv()

BlockComponentPreviewFormReplace::onBuildRender in src/EventSubscriber/BlockComponentPreviewFormReplace.php

Change forms to divs if in layout builder's preview mode.

File

src/EventSubscriber/BlockComponentPreviewFormReplace.php, line 78

Class

BlockComponentPreviewFormReplace

Replaces form elements with divs in layout builder previews.

Namespace

Drupal\dashboards\EventSubscriber

Code

protected function convertFormsToDiv(array $content) {

  // Render the block content early so we can parse the HTML.
  // We keep an original copy around so we can return that if no forms are
  // found. This allows us to only perform the early rendering when
  // necessary.
  $orginal_content = $content;
  $markup = $this->renderer
    ->render($content);
  $html = Html::load((string) $markup);
  $forms = $html
    ->getElementsByTagName('form');
  if ($forms->length) {

    // Iteratve over each form and swap the form element with a div.
    while ($form = $forms
      ->item($forms->length - 1)) {
      $form_children = [];
      foreach ($form->childNodes as $form_child) {
        $form_children[] = $form_child;
      }
      $replacement_div = $html
        ->createElement('div');
      foreach ($form_children as $form_child) {
        $replacement_div
          ->appendChild($form_child);
      }
      foreach ($form->attributes as $form_attr_name => $form_attr) {
        $replacement_div
          ->setAttribute($form_attr_name, $form_attr->nodeValue);
      }
      $form->parentNode
        ->replaceChild($replacement_div, $form);
    }
    $content['#markup'] = $html
      ->saveHTML($html
      ->getElementsByTagName('body')
      ->item(0));
    return $content;
  }
  else {
    return $orginal_content;
  }
}