get('attributes') ?: []; $menu_link = $form_state->getFormObject()->getEntity(); $menu_link_options = $menu_link->link->first()->options ?: []; $menu_link_attributes = isset($menu_link_options['attributes']) ? $menu_link_options['attributes'] : []; $form['options']['attributes'] = [ '#type' => 'details', '#title' => t('Attributes'), '#weight' => -2, '#tree' => TRUE, ]; $config_path = Url::fromRoute('menu_link_attributes.config')->toString(); $referrer_path = parse_url(\Drupal::request()->headers->get('referer'))['path']; $coming_from_config = $config_path == $referrer_path; // Open

element if coming from config page. if ($coming_from_config) { $form['options']['attributes']['#open'] = TRUE; } $destination = \Drupal::destination()->getAsArray(); $config_path = Url::fromRoute('menu_link_attributes.config', [], ['query' => $destination])->toString(); if (count($attributes)) { $form['options']['attributes']['#description'] = '' . t('Manage available attributes here.', ['@config' => $config_path]) . ''; } else { $form['options']['attributes']['help'] = [ '#markup' => t('Manage available attributes here.', ['@config' => $config_path]), ]; } $autofocus = FALSE; // Iterate all defined attributes and create text field for them. foreach ($attributes as $attribute => $info) { // Provide default label / description for attributes. if (empty($info['label'])) { $info['label'] = str_replace('-', ' ', Unicode::ucfirst($attribute)); } if (empty($info['description'])) { $info['description'] = t('Enter value for @attribute attribute.', ['@attribute' => $attribute]); } // Determine type based on options field. $type = !empty($info['options']) ? 'select' : 'textfield'; $form['options']['attributes'][$attribute] = [ '#type' => $type, '#title' => $info['label'], '#description' => $info['description'], '#default_value' => isset($menu_link_attributes[$attribute]) ? $menu_link_attributes[$attribute] : '', ]; // Fill options if select list. if ($type == 'select') { $form['options']['attributes'][$attribute]['#empty_option'] = t('- Select -'); $form['options']['attributes'][$attribute]['#options'] = $info['options']; } // Add "autofocus" attribute for first attribute input field // if coming from config page. if ($coming_from_config && !$autofocus) { $form['options']['attributes'][$attribute]['#attributes'] = ['autofocus' => 'autofocus']; $autofocus = TRUE; } } $form['actions']['submit']['#submit'][] = 'menu_link_attributes_menu_link_content_form_submit'; } /** * Submit function for menu add / edit form. */ function menu_link_attributes_menu_link_content_form_submit($form, FormStateInterface $form_state) { $menu_link = $form_state->getFormObject()->getEntity(); $options = ['attributes' => $form_state->getValue('attributes')]; $menu_link_options = $menu_link->link->first()->options; $menu_link->link->first()->options = array_merge($menu_link_options, $options); $menu_link->save(); } /** * Implements hook_preprocess_menu(). */ function menu_link_attributes_preprocess_menu(&$variables) { menu_link_attibutes_set_attributes($variables['items']); } /** * Set the attributes on the given items. * * @param array $items * List of menu items. */ function menu_link_attibutes_set_attributes($items) { foreach ($items as &$item) { $menu_link_attributes = menu_link_attributes_get_attributes($item['original_link']); if (count($menu_link_attributes)) { $url_attributes = $item['url']->getOption('attributes') ?: []; $attributes = array_merge($url_attributes, $menu_link_attributes); $item['url']->setOption('attributes', $attributes); } if (!empty($item['below'])) { menu_link_attibutes_set_attributes($item['below']); } } } /** * Get menu link attributes. * * @param \Drupal\Core\Menu\MenuLinkInterface $menu_link_content_plugin * A menu link content plugin. * * @return array * An array with the attributes. */ function menu_link_attributes_get_attributes(MenuLinkInterface $menu_link_content_plugin) { $attributes = []; try { $plugin_id = $menu_link_content_plugin->getPluginId(); } catch (PluginNotFoundException $e) { return $attributes; } if (strpos($plugin_id, ':') === FALSE) { return $attributes; } list($entity_type, $uuid) = explode(':', $plugin_id, 2); if ($entity_type == 'menu_link_content') { try { $entity = \Drupal::entityManager()->loadEntityByUuid($entity_type, $uuid); $options = $entity->link->first()->options; $attributes = isset($options['attributes']) ? $options['attributes'] : []; // Class attribute needs special handling because Drupal // may add an "active" class to it. if (isset($attributes['class']) && !is_array($attributes['class'])) { $attributes['class'] = explode(' ', $attributes['class']); } // Remove empty attributes by checking their string length. foreach ($attributes as &$attribute) { if (!is_array($attribute) && Unicode::strlen($attribute) === 0) { unset($attribute); } } } catch (PluginNotfoundException $e) { // Make sure we catch failed entity loadings. } } return $attributes; }