function PrepareLayout::onPrepareLayout

Prepares a layout for use in the UI.

Parameters

\Drupal\layout_builder\Event\PrepareLayoutEvent $event: The prepare layout event.

File

core/modules/layout_builder/src/EventSubscriber/PrepareLayout.php, line 67

Class

PrepareLayout

An event subscriber to prepare section storage.

Namespace

Code

public function onPrepareLayout(PrepareLayoutEvent $event) {
  $section_storage = $event->getSectionStorage();
  // If the layout has pending changes, add a warning.
  if ($this->layoutTempstoreRepository
    ->has($section_storage)) {
    $this->messenger
      ->addWarning($this->t('You have unsaved changes.'));
  }
  else {
    // If the layout is an override that has not yet been overridden, copy the
    // sections from the corresponding default.
    if ($section_storage instanceof OverridesSectionStorageInterface && !$section_storage->isOverridden()) {
      $sections = $section_storage->getDefaultSectionStorage()
        ->getSections();
      foreach ($sections as $section) {
        $section_storage->appendSection($section);
      }
    }
    // Add storage to tempstore regardless of what the storage is.
    $this->layoutTempstoreRepository
      ->set($section_storage);
  }
}