public function LayoutParagraphsWidget::buildLayouts in Layout Paragraphs 1.0.x

Restructures $elements array into layout.

Parameters

array $elements: The widget elements.

\Drupal\Core\Form\FormStateInterface $form_state: The form state object.

Return value

array The restructured with layouts.

File

src/Plugin/Field/FieldWidget/LayoutParagraphsWidget.php, line 820

Class

LayoutParagraphsWidget

Entity Reference with Layout field widget.

Namespace

Drupal\layout_paragraphs\Plugin\Field\FieldWidget

Code

public function buildLayouts(array $elements, FormStateInterface $form_state) {
  $tree = [
    '#parents' => [],
  ];
  $paragraph_elements = [];
  $elements['#items'] = [];
  foreach (Element::children($elements) as $index) {
    $element = $elements[$index];
    if (!empty($element['#widget_item'])) {
      $paragraph_elements[$element['#entity']
        ->uuid()] = $element;

      // Maintain a hidden flat list of elements to easily locate items.
      $elements['#items'][$element['#entity']
        ->uuid()] = $element;
      unset($elements[$index]);
    }
  }

  // Move any orphaned items to the disabled bin.
  foreach ($paragraph_elements as $index => $element) {
    $paragraph = $element['#entity'];
    $layout_settings = $this
      ->getLayoutSettings($paragraph);
    $parent_uuid = $layout_settings['parent_uuid'];
    if ($parent_uuid && !isset($paragraph_elements[$parent_uuid])) {
      $paragraph_elements[$index]['#region'] = '_disabled';
    }
  }

  // Sort items by weight to make sure we're processing the correct order.
  uasort($paragraph_elements, function ($a, $b) {
    if ($a['#weight'] == $b['#weight']) {
      return 0;
    }
    return $a['#weight'] < $b['#weight'] ? -1 : 1;
  });
  while ($element = array_shift($paragraph_elements)) {

    /* @var \Drupal\Core\Entity\EntityInterface $entity */
    $entity = $element['#entity'];
    if ($element['#layout']) {
      $tree[$entity
        ->uuid()] = $this
        ->buildLayout($element, $paragraph_elements, $elements['disabled']['items']);
    }
    else {
      $tree[$entity
        ->uuid()] = $element;
    }

    // Move disabled items to disabled region.
    if ($element['#region'] == '_disabled') {
      $elements['disabled']['items'][$entity
        ->uuid()] = $tree[$entity
        ->uuid()];
      unset($tree[$entity
        ->uuid()]);
    }
  }
  $elements['active_items'] = [
    '#type' => 'container',
    '#attributes' => [
      'class' => [
        'active-items',
      ],
      'id' => $this->wrapperId . "--active-items",
    ],
    'items' => $tree,
    '#parents' => [],
  ];
  return $elements;
}