/**
* Returns the maximum depth of the possible parents of the menu link.
*
* @param string $id
* The menu link plugin ID or an empty value for a new link.
*
* @return int
* The depth related to the depth of the given menu link.
*/
protected function getParentDepthLimit($id)
{
if ($id) {
$limit = $this->menuLinkTree->maxDepth() - $this->menuLinkTree->getSubtreeHeight($id);
} else {
$limit = $this->menuLinkTree->maxDepth() - 1;
}
return $limit;
}
/**
* {@inheritdoc}
*/
public function build()
{
$menu_name = $this->getDerivativeId();
$parameters = $this->menuTree->getCurrentRouteMenuTreeParameters($menu_name);
// Adjust the menu tree parameters based on the block's configuration.
$level = $this->configuration['level'];
$depth = $this->configuration['depth'];
$parameters->setMinDepth($level);
// When the depth is configured to zero, there is no depth limit. When depth
// is non-zero, it indicates the number of levels that must be displayed.
// Hence this is a relative depth that we must convert to an actual
// (absolute) depth, that may never exceed the maximum depth.
if ($depth > 0) {
$parameters->setMaxDepth(min($level + $depth - 1, $this->menuTree->maxDepth()));
}
$tree = $this->menuTree->load($menu_name, $parameters);
$manipulators = array(array('callable' => 'menu.default_tree_manipulators:checkAccess'), array('callable' => 'menu.default_tree_manipulators:generateIndexAndSort'));
$tree = $this->menuTree->transform($tree, $manipulators);
return $this->menuTree->build($tree);
}
/**
* {@inheritdoc}
*/
public function settingsForm(array $form, FormStateInterface $form_state)
{
$menu_enabled = $this->moduleHandler->moduleExists('menu_ui');
if ($menu_enabled) {
$menus = array('__new-menu__' => $this->t('Create new menu(s)')) + menu_ui_get_menus();
} else {
$menus = menu_list_system_menus();
}
$form['existing_menus'] = array('#type' => 'checkboxes', '#title' => $this->t('Generate links for these menus'), '#options' => $menus, '#default_value' => array('__new-menu__'), '#required' => TRUE);
if ($menu_enabled) {
$form['num_menus'] = array('#type' => 'number', '#title' => $this->t('Number of new menus to create'), '#default_value' => $this->getSetting('num_menus'), '#min' => 0, '#states' => array('visible' => array(':input[name="existing_menus[__new-menu__]"]' => array('checked' => TRUE))));
}
$form['num_links'] = array('#type' => 'number', '#title' => $this->t('Number of links to generate'), '#default_value' => $this->getSetting('num_links'), '#required' => TRUE, '#min' => 0);
$form['title_length'] = array('#type' => 'number', '#title' => $this->t('Maximum number of characters in menu and menu link names'), '#description' => $this->t('The minimum length is 2.'), '#default_value' => $this->getSetting('title_length'), '#required' => TRUE, '#min' => 2, '#max' => 128);
$form['link_types'] = array('#type' => 'checkboxes', '#title' => $this->t('Types of links to generate'), '#options' => array('node' => $this->t('Nodes'), 'front' => $this->t('Front page'), 'external' => $this->t('External')), '#default_value' => array('node', 'front', 'external'), '#required' => TRUE);
$form['max_depth'] = array('#type' => 'select', '#title' => $this->t('Maximum link depth'), '#options' => range(0, $this->menuLinkTree->maxDepth()), '#default_value' => floor($this->menuLinkTree->maxDepth() / 2), '#required' => TRUE);
unset($form['max_depth']['#options'][0]);
$form['max_width'] = array('#type' => 'number', '#title' => $this->t('Maximum menu width'), '#default_value' => $this->getSetting('max_width'), '#description' => $this->t('Limit the width of the generated menu\'s first level of links to a certain number of items.'), '#required' => TRUE, '#min' => 0);
$form['kill'] = array('#type' => 'checkbox', '#title' => $this->t('Delete existing custom generated menus and menu links before generating new ones.'), '#default_value' => $this->getSetting('kill'));
return $form;
}
