function menu_form_node_form_alter in Drupal 7

Implements hook_form_BASE_FORM_ID_alter().

Adds menu item fields to the node form.

See also

menu_node_submit()

File

modules/menu/menu.module, line 683

Allows administrators to customize the site's navigation menus.

Code

function menu_form_node_form_alter(&$form, $form_state) {

  // Generate a list of possible parents (not including this link or descendants).
  // @todo This must be handled in a #process handler.
  $link = $form['#node']->menu;
  $type = $form['#node']->type;

  // menu_parent_options() is goofy and can actually handle either a menu link
  // or a node type both as second argument. Pick based on whether there is
  // a link already (menu_node_prepare() sets mlid default to 0).
  $options = menu_parent_options(menu_get_menus(), $link['mlid'] ? $link : $type, $type);

  // If no possible parent menu items were found, there is nothing to display.
  if (empty($options)) {
    return;
  }
  $form['menu'] = array(
    '#type' => 'fieldset',
    '#title' => t('Menu settings'),
    '#access' => user_access('administer menu'),
    '#collapsible' => TRUE,
    '#collapsed' => !$link['link_title'],
    '#group' => 'additional_settings',
    '#attached' => array(
      'js' => array(
        drupal_get_path('module', 'menu') . '/menu.js',
      ),
    ),
    '#tree' => TRUE,
    '#weight' => -2,
    '#attributes' => array(
      'class' => array(
        'menu-link-form',
      ),
    ),
  );
  $form['menu']['enabled'] = array(
    '#type' => 'checkbox',
    '#title' => t('Provide a menu link'),
    '#default_value' => (int) (bool) $link['mlid'],
  );
  $form['menu']['link'] = array(
    '#type' => 'container',
    '#parents' => array(
      'menu',
    ),
    '#states' => array(
      'invisible' => array(
        'input[name="menu[enabled]"]' => array(
          'checked' => FALSE,
        ),
      ),
    ),
  );

  // Populate the element with the link data.
  foreach (array(
    'mlid',
    'module',
    'hidden',
    'has_children',
    'customized',
    'options',
    'expanded',
    'hidden',
    'parent_depth_limit',
  ) as $key) {
    $form['menu']['link'][$key] = array(
      '#type' => 'value',
      '#value' => $link[$key],
    );
  }
  $form['menu']['link']['link_title'] = array(
    '#type' => 'textfield',
    '#title' => t('Menu link title'),
    '#maxlength' => 255,
    '#default_value' => $link['link_title'],
  );
  $form['menu']['link']['description'] = array(
    '#type' => 'textarea',
    '#title' => t('Description'),
    '#default_value' => isset($link['options']['attributes']['title']) ? $link['options']['attributes']['title'] : '',
    '#rows' => 1,
    '#description' => t('Shown when hovering over the menu link.'),
  );
  $default = $link['mlid'] ? $link['menu_name'] . ':' . $link['plid'] : variable_get('menu_parent_' . $type, 'main-menu:0');

  // If the current parent menu item is not present in options, use the first
  // available option as default value.
  // @todo User should not be allowed to access menu link settings in such a
  // case.
  if (!isset($options[$default])) {
    $array = array_keys($options);
    $default = reset($array);
  }
  $form['menu']['link']['parent'] = array(
    '#type' => 'select',
    '#title' => t('Parent item'),
    '#default_value' => $default,
    '#options' => $options,
    '#attributes' => array(
      'class' => array(
        'menu-parent-select',
      ),
    ),
  );

  // Get number of items in all possible parent menus so the weight selector is
  // sized appropriately.
  $menu_names = array_keys(menu_get_menus());
  $menu_options = array();
  foreach ($menu_names as $menu_name) {
    if (isset($options[$menu_name . ':0'])) {
      $menu_options[] = $menu_name;
    }
  }

  // Make sure that we always have values in menu_options.
  $menu_options = !empty($menu_options) ? $menu_options : $menu_names;
  $form['menu']['link']['weight'] = array(
    '#type' => 'weight',
    '#title' => t('Weight'),
    '#delta' => _menu_get_menu_weight_delta($menu_options),
    '#default_value' => $link['weight'],
    '#description' => t('Menu links with smaller weights are displayed before links with larger weights.'),
  );
}