protected function ParagraphsWidget::buildNestedParagraphsFoDragDrop

Builds the nested drag and drop structure.

Parameters

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

\Drupal\paragraphs\ParagraphInterface|null $paragraph: The parent paragraph, NULL for the initial call.

string[] $array_parents: The array parents for nested paragraphs.

Return value

array The built form structure.

File

paragraphs/src/Plugin/Field/FieldWidget/ParagraphsWidget.php, line 1558

Class

ParagraphsWidget

Plugin implementation of the 'entity_reference_revisions paragraphs' widget.

Namespace

Code

protected function buildNestedParagraphsFoDragDrop(FormStateInterface $form_state, ParagraphInterface $paragraph = NULL, array $array_parents = []) {

  // Look for nested elements.
  $elements = [];
  $field_definitions = [];
  if ($paragraph) {
    foreach ($paragraph
      ->getFieldDefinitions() as $child_field_name => $field_definition) {

      /** @var \Drupal\Core\Field\FieldDefinitionInterface $field_definition */
      if ($field_definition
        ->getType() == 'entity_reference_revisions' && $field_definition
        ->getSetting('target_type') == 'paragraph') {
        $field_definitions[$child_field_name] = $field_definition;
      }
    }
  }
  else {
    $field_definitions = [
      $this->fieldDefinition
        ->getName() => $this->fieldDefinition,
    ];
  }

  /** @var \Drupal\Core\Field\FieldDefinitionInterface $field_definition */
  foreach ($field_definitions as $child_field_name => $field_definition) {
    $child_path = implode('][', array_merge($array_parents, [
      $child_field_name,
    ]));
    $cardinality = $field_definition
      ->getFieldStorageDefinition()
      ->getCardinality();
    $allowed_types = implode(',', array_keys($this
      ->getAllowedTypes($field_definition)));
    $elements[$child_field_name] = [
      '#type' => 'container',
      '#attributes' => [
        'class' => [
          'paragraphs-dragdrop-wrapper',
        ],
      ],
    ];

    // Only show a field label if there is more than one paragraph field.
    $label = count($field_definitions) > 1 || !$paragraph ? '<label><strong class="paragraphs-dragdrop__label paragraphs-dragdrop__label--field">' . $field_definition
      ->getLabel() . '</strong></label>' : '';
    $elements[$child_field_name]['list'] = [
      '#type' => 'markup',
      '#prefix' => $label . '<ul class="paragraphs-dragdrop__list" data-paragraphs-dragdrop-cardinality="' . $cardinality . '" data-paragraphs-dragdrop-allowed-types="' . $allowed_types . '" data-paragraphs-dragdrop-path="' . $child_path . '">',
      '#suffix' => '</ul>',
    ];

    /** @var \Drupal\paragraphs\Entity\Paragraph $child_paragraph */
    foreach ($this
      ->getChildParagraphs($form_state, $child_field_name, $paragraph, $array_parents) as $child_delta => $child_paragraph) {
      $element = [];
      $element['top'] = [
        '#type' => 'container',
        '#attributes' => [
          'class' => [
            'paragraphs-summary-wrapper',
          ],
        ],
      ];
      $element['top']['paragraph_summary']['type'] = [
        '#markup' => '<strong class="paragraphs-dragdrop__label paragraphs-dragdrop__label--bundle">' . $child_paragraph
          ->getParagraphType()
          ->label() . '</strong>',
      ];

      // We name the element '_weight' to avoid clashing with elements
      // defined by widget.
      $element['_weight'] = array(
        '#type' => 'hidden',
        '#default_value' => $child_delta,
        '#attributes' => [
          'class' => [
            'paragraphs-dragdrop__weight',
          ],
        ],
      );
      $element['_path'] = [
        '#type' => 'hidden',
        '#title' => $this
          ->t('Current path for @number', [
          '@number' => $delta = 1,
        ]),
        '#title_display' => 'invisible',
        '#default_value' => $child_path,
        '#attributes' => [
          'class' => [
            'paragraphs-dragdrop__path',
          ],
        ],
      ];
      $summary_options = [];
      $element['#prefix'] = '<li class="paragraphs-dragdrop__item" data-paragraphs-dragdrop-bundle="' . $child_paragraph
        ->bundle() . '"><a href="#" class="paragraphs-dragdrop__handle"><span class="paragraphs-dragdrop__icon"></span></a>';
      $element['#suffix'] = '</li>';
      $child_array_parents = array_merge($array_parents, [
        $child_field_name,
        $child_delta,
      ]);
      if ($child_elements = $this
        ->buildNestedParagraphsFoDragDrop($form_state, $child_paragraph, $child_array_parents)) {
        $element['dragdrop'] = $child_elements;

        // Set the depth limit to 0 to avoid displaying a summary for the
        // children.
        $summary_options['depth_limit'] = 1;
      }
      $element['top']['summary']['fields_info'] = [
        '#theme' => 'paragraphs_summary',
        '#summary' => $child_paragraph
          ->getSummaryItems($summary_options),
        '#expanded' => FALSE,
        '#access' => $child_paragraph
          ->access('update') || $child_paragraph
          ->access('view'),
      ];
      $info = $child_paragraph
        ->getIcons();
      if (isset($info['count'])) {
        $element['top']['icons']['count'] = $info['count'];
      }
      $elements[$child_field_name]['list'][$child_delta] = $element;
    }
  }
  return $elements;
}