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<?php
namespace Drupal\field_menu\Plugin\Field\FieldWidget;
use Drupal\Core\StringTranslation\StringTranslationTrait;
use Drupal\Core\Field\FieldItemListInterface;
use Drupal\Core\Field\FieldDefinitionInterface;
use Drupal\Core\Field\WidgetBase;
use Drupal\Core\Form\FormStateInterface;
use Drupal\Core\Menu\MenuParentFormSelectorInterface;
use Drupal\Core\Plugin\ContainerFactoryPluginInterface;
use Symfony\Component\DependencyInjection\ContainerInterface;
class TreeWidget extends WidgetBase implements ContainerFactoryPluginInterface {
use StringTranslationTrait;
protected $menuParentSelector;
public function __construct($plugin_id, $plugin_definition, FieldDefinitionInterface $field_definition, array $settings, array $third_party_settings, MenuParentFormSelectorInterface $menu_parent_selector) {
parent::__construct($plugin_id, $plugin_definition, $field_definition, $settings, $third_party_settings);
$this->menuParentSelector = $menu_parent_selector;
}
public static function create(ContainerInterface $container, array $configuration, $plugin_id, $plugin_definition) {
return new static($plugin_id, $plugin_definition, $configuration['field_definition'], $configuration['settings'], $configuration['third_party_settings'], $container
->get('menu.parent_form_selector'));
}
public static function defaultSettings() {
return [
'max_depth' => 0,
'menu_item_key' => '',
'include_root' => FALSE,
'menu_title' => '',
] + parent::defaultSettings();
}
public function formElement(FieldItemListInterface $items, $delta, array $element, array &$form, FormStateInterface $form_state) {
$element['menu_title'] = [
'#type' => 'textfield',
'#title' => $this
->t('Title'),
'#default_value' => isset($items[$delta]->menu_title) ? $items[$delta]->menu_title : $this
->getSetting('menu_title'),
'#description' => $this
->t('Optional title for the menu.'),
];
$menu_key_value = isset($items[$delta]->menu_item_key) ? $items[$delta]->menu_item_key : $this
->getSetting('menu_item_key');
$menu_key_value_arr = explode(':', $menu_key_value);
$menu_name = isset($menu_key_value_arr[0]) && $menu_key_value_arr[0] ? $menu_key_value_arr[0] : NULL;
$parent = isset($menu_key_value_arr[1]) && $menu_key_value_arr[1] ? $menu_key_value_arr[1] : NULL;
$menu_link = isset($menu_key_value_arr[2]) && $menu_key_value_arr[2] ? $menu_key_value_arr[2] : NULL;
$menu_parent = $menu_name . ':' . $parent;
$menus = NULL;
if (!empty($items
->getSetting('menu_type_checkbox'))) {
$menu_selected = array_diff($items
->getSetting('menu_type_checkbox'), [
0,
]);
$menus = empty($menu_selected) ? NULL : $menu_selected;
}
$menu_item_key_field = $this->menuParentSelector
->parentSelectElement($menu_parent, $menu_link, $menus);
$menu_item_key_field['#default_value'] = $menu_key_value;
$menu_item_key_field['#description'] = $this
->t('Select a menu root item from the available menu links');
$menu_item_key_field += [
'#empty_value' => '',
'#title' => $this
->t('Root'),
];
$element['menu_item_key'] = $menu_item_key_field;
$element['max_depth'] = [
'#type' => 'number',
'#title' => $this
->t('Max depth'),
'#default_value' => isset($items[$delta]->max_depth) ? $items[$delta]->max_depth : $this
->getSetting('max_depth'),
'#description' => $this
->t('Maximum depth of the menu tree (0 is no limit).'),
'#min' => 0,
];
$element['include_root'] = [
'#type' => 'checkbox',
'#title' => $this
->t('Include root?'),
'#description' => $this
->t('Include the root item in the tree or just the child elements'),
'#default_value' => isset($items[$delta]->include_root) ? $items[$delta]->include_root : $this
->getSetting('include_root'),
];
$element += [
'#element_validate' => [
[
$this,
'validate',
],
],
];
if ($this->fieldDefinition
->getFieldStorageDefinition()
->getCardinality() == 1) {
$element += [
'#type' => 'fieldset',
'#attributes' => [
'class' => [
'container',
],
],
];
}
return $element;
}
public function validate($element, FormStateInterface $form_state) {
$menu_item_key = isset($element['menu_item_key']['#value']) ? $element['menu_item_key']['#value'] : '';
if (strlen($menu_item_key) == 0) {
$form_state
->setValueForElement($element['menu_item_key'], '');
if ($element['menu_title']['#value']) {
$form_state
->setError($element['menu_item_key'], $this
->t("You must select a menu item if you have set a title"));
}
}
}
}