public function SystemMenuBlock::blockForm in Drupal 8

Same name and namespace in other branches

1. 9 core/modules/system/src/Plugin/Block/SystemMenuBlock.php \Drupal\system\Plugin\Block\SystemMenuBlock::blockForm()

Overrides BlockPluginTrait::blockForm

File

core/modules/system/src/Plugin/Block/SystemMenuBlock.php, line 83

Class

SystemMenuBlock

Provides a generic Menu block.

Namespace

Drupal\system\Plugin\Block

Code

public function blockForm($form, FormStateInterface $form_state) {
  $config = $this->configuration;
  $defaults = $this
    ->defaultConfiguration();
  $form['menu_levels'] = [
    '#type' => 'details',
    '#title' => $this
      ->t('Menu levels'),
    // Open if not set to defaults.
    '#open' => $defaults['level'] !== $config['level'] || $defaults['depth'] !== $config['depth'],
    '#process' => [
      [
        get_class(),
        'processMenuLevelParents',
      ],
    ],
  ];
  $options = range(0, $this->menuTree
    ->maxDepth());
  unset($options[0]);
  $form['menu_levels']['level'] = [
    '#type' => 'select',
    '#title' => $this
      ->t('Initial visibility level'),
    '#default_value' => $config['level'],
    '#options' => $options,
    '#description' => $this
      ->t('The menu is only visible if the menu item for the current page is at this level or below it. Use level 1 to always display this menu.'),
    '#required' => TRUE,
  ];
  $options[0] = $this
    ->t('Unlimited');
  $form['menu_levels']['depth'] = [
    '#type' => 'select',
    '#title' => $this
      ->t('Number of levels to display'),
    '#default_value' => $config['depth'],
    '#options' => $options,
    '#description' => $this
      ->t('This maximum number includes the initial level.'),
    '#required' => TRUE,
  ];
  $form['menu_levels']['expand_all_items'] = [
    '#type' => 'checkbox',
    '#title' => $this
      ->t('Expand all menu items'),
    '#default_value' => !empty($config['expand_all_items']),
    '#description' => $this
      ->t('Override the option found on each menu link used for expanding children and instead display the whole menu tree as expanded.'),
  ];
  return $form;
}