Same name and namespace in other branches
  1. 8.9.x core/modules/menu_ui/menu_ui.module \menu_ui_form_node_form_alter()
  2. 9 core/modules/menu_ui/menu_ui.module \menu_ui_form_node_form_alter()

Implements hook_form_BASE_FORM_ID_alter() for \Drupal\node\NodeForm.

Adds menu item fields to the node form.

See also

menu_ui_form_node_form_submit()

File

core/modules/menu_ui/menu_ui.module, line 214
Allows administrators to customize the site's navigation menus.

Code

function menu_ui_form_node_form_alter(&$form, FormStateInterface $form_state) {

  // Generate a list of possible parents (not including this link or descendants).
  // @todo This must be handled in a #process handler.
  $node = $form_state
    ->getFormObject()
    ->getEntity();
  $defaults = menu_ui_get_menu_link_defaults($node);

  /** @var \Drupal\node\NodeTypeInterface $node_type */
  $node_type = $node->type->entity;

  /** @var \Drupal\Core\Menu\MenuParentFormSelectorInterface $menu_parent_selector */
  $menu_parent_selector = \Drupal::service('menu.parent_form_selector');
  $type_menus_ids = $node_type
    ->getThirdPartySetting('menu_ui', 'available_menus', [
    'main',
  ]);
  if (empty($type_menus_ids)) {
    return;
  }

  /** @var \Drupal\system\MenuInterface[] $type_menus */
  $type_menus = Menu::loadMultiple($type_menus_ids);
  $available_menus = [];
  foreach ($type_menus as $menu) {
    $available_menus[$menu
      ->id()] = $menu
      ->label();
  }
  if ($defaults['id']) {
    $default = $defaults['menu_name'] . ':' . $defaults['parent'];
  }
  else {
    $default = $node_type
      ->getThirdPartySetting('menu_ui', 'parent', 'main:');
  }
  $parent_element = $menu_parent_selector
    ->parentSelectElement($default, $defaults['id'], $available_menus);

  // If no possible parent menu items were found, there is nothing to display.
  if (empty($parent_element)) {
    return;
  }
  $form['menu'] = [
    '#type' => 'details',
    '#title' => t('Menu settings'),
    '#access' => \Drupal::currentUser()
      ->hasPermission('administer menu'),
    '#open' => (bool) $defaults['id'],
    '#group' => 'advanced',
    '#attached' => [
      'library' => [
        'menu_ui/drupal.menu_ui',
      ],
    ],
    '#tree' => TRUE,
    '#weight' => -2,
    '#attributes' => [
      'class' => [
        'menu-link-form',
      ],
    ],
  ];
  $form['menu']['enabled'] = [
    '#type' => 'checkbox',
    '#title' => t('Provide a menu link'),
    '#default_value' => (int) (bool) $defaults['id'],
  ];
  $form['menu']['link'] = [
    '#type' => 'container',
    '#parents' => [
      'menu',
    ],
    '#states' => [
      'invisible' => [
        'input[name="menu[enabled]"]' => [
          'checked' => FALSE,
        ],
      ],
    ],
  ];

  // Populate the element with the link data.
  foreach ([
    'id',
    'entity_id',
  ] as $key) {
    $form['menu']['link'][$key] = [
      '#type' => 'value',
      '#value' => $defaults[$key],
    ];
  }
  $form['menu']['link']['title'] = [
    '#type' => 'textfield',
    '#title' => t('Menu link title'),
    '#default_value' => $defaults['title'],
    '#maxlength' => $defaults['title_max_length'],
  ];
  $form['menu']['link']['description'] = [
    '#type' => 'textfield',
    '#title' => t('Description'),
    '#default_value' => $defaults['description'],
    '#description' => t('Shown when hovering over the menu link.'),
    '#maxlength' => $defaults['description_max_length'],
  ];
  $form['menu']['link']['menu_parent'] = $parent_element;
  $form['menu']['link']['menu_parent']['#title'] = t('Parent link');
  $form['menu']['link']['menu_parent']['#attributes']['class'][] = 'menu-parent-select';
  $form['menu']['link']['weight'] = [
    '#type' => 'number',
    '#title' => t('Weight'),
    '#default_value' => $defaults['weight'],
    '#description' => t('Menu links with lower weights are displayed before links with higher weights.'),
  ];
  foreach (array_keys($form['actions']) as $action) {
    if ($action != 'preview' && isset($form['actions'][$action]['#type']) && $form['actions'][$action]['#type'] === 'submit') {
      $form['actions'][$action]['#submit'][] = 'menu_ui_form_node_form_submit';
    }
  }
  $form['#entity_builders'][] = 'menu_ui_node_builder';
}