pmmi_fields.module

<?php

/**
 * @file
 * Contains pmmi_fields.module.
 */

use Drupal\Core\Entity\EntityTypeInterface;
use Drupal\Core\Field\BaseFieldDefinition;
use Drupal\Core\Render\Element;
use Drupal\Core\Routing\RouteMatchInterface;

/**
 * Implements hook_help().
 */
function pmmi_fields_help($route_name, RouteMatchInterface $route_match) {
  switch ($route_name) {
    // Main module help for the pmmi_fields module.
    case 'help.page.pmmi_fields':
      $output = '';
      $output .= '<h3>' . t('About') . '</h3>';
      $output .= '<p>' . t('PMMI Fields') . '</p>';
      return $output;

    default:
  }
}

/**
 * Implements hook_entity_base_field_info().
 */
function pmmi_fields_entity_base_field_info(EntityTypeInterface $entity_type) {
  $fields = [];
  if ($entity_type->id() === 'menu_link_content') {
    $fields['submenu_background'] = BaseFieldDefinition::create('image')
      ->setLabel(t('Submenu background'))
      ->setDescription(t('Submenu background for megaMenu.'))
      ->setSettings([
        'file_directory' => 'menu_image',
        'alt_field_required' => FALSE,
        'file_extensions' => 'png jpg jpeg',
      ])
      ->setDisplayOptions('form', [
        'type' => 'hidden',
      ])
      ->setDisplayOptions('form', [
        'label' => 'hidden',
        'type' => 'image_image',
        'weight' => 0,
      ])
      ->setDisplayConfigurable('form', TRUE);

    return $fields;
  }
}

/**
 * Implements hook_theme().
 */
function pmmi_fields_theme() {
  return [
    'pmmi_fields_entity_table' => [
      'render element' => 'form',
      'function' => 'theme_pmmi_fields_entity_table',
    ],
    'double_field_mail_link' => [
      'render element' => 'element',
      'variables' => ['item' => NULL],
    ],
  ];
}

/**
 * Themes the table showing existing entity references in the widget.
 *
 * @NOTE This is 100% copy paste from theme_inline_entity_form_entity_table(),
 * except few lines.
 * You can find custom code by comments 'Start custom code' and 'End custom code'.
 * Unfortunately there is no way to reuse existing theme_inline_entity_form_entity_table() function.
 * The only way to do it is mark view_mode as a field type and added it as a field to all entities.
 * This will be a big overhead. For details see this line in this function.
 * @code
 *  elseif ($field['type'] == 'field' && $entity->hasField($field_name)) {
 * @endcode
 * That's why we have only one way to add view mode to this table.
 * Just copy paste and modify.
 *
 * Important: Fill free to update this code with the latest one from theme_inline_entity_form_entity_table(),
 * after that put back custom code after update.
 *
 * @param array $variables
 *   Contains the form element data from $element['entities'].
 *
 * @return array
 *   Render array.
 *
 * @throws \Drupal\Component\Plugin\Exception\InvalidPluginDefinitionException
 */
function theme_pmmi_fields_entity_table($variables) {
  /** @var \Drupal\Core\Render\Renderer $renderer */
  $renderer = \Drupal::service('renderer');
  $form = $variables['form'];
  $entity_type = $form['#entity_type'];

  $fields = $form['#table_fields'];
  $has_tabledrag = \Drupal::entityTypeManager()->getHandler($entity_type, 'inline_form')->isTableDragEnabled($form);

  // Sort the fields by weight.
  uasort($fields, '\Drupal\Component\Utility\SortArray::sortByWeightElement');

  $header = [];
  if ($has_tabledrag) {
    $header[] = ['data' => '', 'class' => ['ief-tabledrag-header']];
    $header[] = ['data' => t('Sort order'), 'class' => ['ief-sort-order-header']];
  }
  // Add header columns for each field.
  $first = TRUE;
  foreach ($fields as $field_name => $field) {
    $column = ['data' => $field['label'], 'class' => ['inline-entity-form-' . $entity_type . '-' . $field_name]];
    // The first column gets a special class.
    if ($first) {
      $column['class'][] = 'ief-first-column-header';
      $first = FALSE;
    }
    $header[] = $column;
  }
  $header[] = t('Operations');

  // Build an array of entity rows for the table.
  $rows = [];
  foreach (Element::children($form) as $key) {
    /** @var \Drupal\Core\Entity\FieldableEntityInterface $entity */
    $entity = $form[$key]['#entity'];
    $row_classes = ['ief-row-entity'];
    $cells = [];
    if ($has_tabledrag) {
      $cells[] = ['data' => '', 'class' => ['ief-tabledrag-handle']];
      $cells[] = $renderer->render($form[$key]['delta']);
      $row_classes[] = 'draggable';
    }
    // Add a special class to rows that have a form underneath, to allow
    // for additional styling.
    if (!empty($form[$key]['form'])) {
      $row_classes[] = 'ief-row-entity-form';
    }

    foreach ($fields as $field_name => $field) {
      if ($field['type'] == 'label') {
        $data = $variables['form'][$key]['#label'];
      }
      elseif ($field['type'] == 'field' && $entity->hasField($field_name)) {
        $display_options = ['label' => 'hidden'];
        if (isset($field['display_options'])) {
          $display_options += $field['display_options'];
        }
        $data = $entity->get($field_name)->view($display_options);
      }
      elseif ($field['type'] == 'callback') {
        $arguments = [
          'entity' => $entity,
          'variables' => $variables,
        ];
        if (isset($field['callback_arguments'])) {
          $arguments = array_merge($arguments, $field['callback_arguments']);
        }

        $data = call_user_func_array($field['callback'], $arguments);
      }
      // Start custom.
      elseif ($field['type'] == 'view_mode') {
        // Add the column belonging to the "View mode" column.
        $data = $renderer->render($form[$key]['view_mode']);
      }
      // End custom code.
      else {
        $data = t('N/A');
      }

      $cells[] = ['data' => $data, 'class' => ['inline-entity-form-' . $entity_type . '-' . $field_name]];
    }

    // Add the buttons belonging to the "Operations" column.
    $cells[] = $renderer->render($form[$key]['actions']);
    // Create the row.
    $rows[] = ['data' => $cells, 'class' => $row_classes];
    // If the current entity array specifies a form, output it in the next row.
    if (!empty($form[$key]['form'])) {
      $row = [
        ['data' => $renderer->render($form[$key]['form']), 'colspan' => count($fields) + 1],
      ];
      $rows[] = ['data' => $row, 'class' => ['ief-row-form'], 'no_striping' => TRUE];
    }
  }

  if (!empty($rows)) {
    $tabledrag = [];
    if ($has_tabledrag) {
      $tabledrag = [
        [
          'action' => 'order',
          'relationship' => 'sibling',
          'group' => 'ief-entity-delta',
        ],
      ];
    }

    $table = [
      '#type' => 'table',
      '#header' => $header,
      '#rows' => $rows,
      '#attributes' => [
        'id' => 'ief-entity-table-' . $form['#id'],
        'class' => ['ief-entity-table'],
      ],
      '#tabledrag' => $tabledrag,
    ];

    return $renderer->render($table);
  }
}