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class HorizontalTabs in Field Group 8.3

Same name and namespace in other branches
  1. 8 src/Element/HorizontalTabs.php \Drupal\field_group\Element\HorizontalTabs

Provides a render element for horizontal tabs.

Formats all child details and all non-child details whose #group is assigned this element's name as horizontal tabs.

Plugin annotation

@FormElement("horizontal_tabs");

Hierarchy

Expanded class hierarchy of HorizontalTabs

1 file declares its use of HorizontalTabs
Tabs.php in src/Plugin/field_group/FieldGroupFormatter/Tabs.php

File

src/Element/HorizontalTabs.php, line 17

Namespace

Drupal\field_group\Element
View source 
class HorizontalTabs extends RenderElement {

  /**
   * {@inheritdoc}
   */
  public function getInfo() {
    $class = get_class($this);
    return [
      '#default_tab' => '',
      '#process' => [
        [
          $class,
          'processHorizontalTabs',
        ],
        [
          $class,
          'processGroup',
        ],
      ],
      '#pre_render' => [
        [
          $class,
          'preRenderGroup',
        ],
      ],
      '#theme_wrappers' => [
        'horizontal_tabs',
      ],
    ];
  }

  /**
   * Pre render the group to support #group parameter.
   *
   * @param array $element
   *   An associative array containing the properties and children of the
   *   element.
   *
   * @return array
   *   The modified element with all group members.
   */
  public static function preRenderGroup($element) {

    // The element may be rendered outside of a Form API context.
    if (!isset($element['#parents']) || !isset($element['#groups'])) {
      return $element;
    }
    if (isset($element['#group'])) {

      // Contains form element summary functionalities.
      $element['#attached']['library'][] = 'core/drupal.form';
      $group = $element['#group'];

      // If this element belongs to a group, but the group-holding element does
      // not exist, we need to render it (at its original location).
      if (!isset($element['#groups'][$group]['#group_exists'])) {

        // Intentionally empty to clarify the flow; we simply return $element.
      }
      elseif (!empty($element['#group_details'])) {

        // Intentionally empty to clarify the flow; we simply return $element.
      }
      elseif (Element::children($element['#groups'][$group])) {
        $element['#printed'] = TRUE;
      }
    }

    // Search for the correct default active tab.
    $group_identifier = implode('][', $element['#parents']);
    if (!empty($element['#groups'][$group_identifier])) {
      $children = Element::children($element['#groups'][$group_identifier], TRUE);
      foreach ($children as $key) {
        if (!empty($element['#groups'][$group_identifier][$key]['#open'])) {
          $element['#default_tab'] = $element['#groups'][$group_identifier][$key]['#id'];
          $element[str_replace('][', '__', $group_identifier) . '__active_tab']['#value'] = $element['#default_tab'];
        }
      }
    }
    return $element;
  }

  /**
   * Creates a group formatted as horizontal tabs.
   *
   * @param array $element
   *   An associative array containing the properties and children of the
   *   details element.
   * @param \Drupal\Core\Form\FormStateInterface $form_state
   *   The current state of the form.
   * @param bool $on_form
   *   Are the tabs rendered on a form or not.
   *
   * @return array
   *   The processed element.
   */
  public static function processHorizontalTabs(array &$element, FormStateInterface $form_state, $on_form = TRUE) {

    // Inject a new details as child, so that form_process_details() processes
    // this details element like any other details.
    $element['group'] = [
      '#type' => 'details',
      '#theme_wrappers' => [],
      '#parents' => $element['#parents'],
    ];

    // Add an invisible label for accessibility.
    if (!isset($element['#title'])) {
      $element['#title'] = t('Horizontal Tabs');
      $element['#title_display'] = 'invisible';
    }

    // Add required JavaScript and Stylesheet.
    $element['#attached']['library'][] = 'field_group/element.horizontal_tabs';

    // Only add forms library on forms.
    if ($on_form) {
      $element['#attached']['library'][] = 'core/drupal.form';
    }
    $name = implode('__', $element['#parents']);
    if ($form_state
      ->hasValue($name . '__active_tab')) {
      $element['#default_tab'] = $form_state
        ->getValue($name . '__active_tab');
    }
    $displayed_tab = isset($element['#default_tab']) ? $element['#default_tab'] : '';

    // The JavaScript stores the currently selected tab in this hidden
    // field so that the active tab can be restored the next time the
    // form is rendered, e.g. on preview pages or when form validation
    // fails.
    $element['#default_tab'] = $displayed_tab;
    $element[$name . '__active_tab'] = [
      '#type' => 'hidden',
      '#default_value' => $element['#default_tab'],
      '#attributes' => [
        'class' => [
          'horizontal-tabs-active-tab',
        ],
      ],
    ];
    return $element;
  }

  /**
   * Arranges elements into groups.
   *
   * This method is useful for non-input elements that can be used in and
   * outside the context of a form.
   *
   * @param array $element
   *   An associative array containing the properties and children of the
   *   element. Note that $element must be taken by reference here, so processed
   *   child elements are taken over into $form_state.
   * @param \Drupal\Core\Form\FormStateInterface $form_state
   *   The current state of the form.
   * @param array $complete_form
   *   The complete form structure.
   *
   * @return array
   *   The processed element.
   */
  public static function processGroup(&$element, FormStateInterface $form_state, &$complete_form) {
    $groups =& $form_state
      ->getGroups();
    $element['#groups'] =& $groups;
    if (isset($element['#group'])) {

      // Add this element to the defined group (by reference).
      $group = $element['#group'];
      $groups[$group][] =& $element;
    }
    return $element;
  }

}

Members

Namesort descending Modifiers Type Description Overrides
DependencySerializationTrait::$_entityStorages protected property An array of entity type IDs keyed by the property name of their storages.
DependencySerializationTrait::$_serviceIds protected property An array of service IDs keyed by property name used for serialization.
DependencySerializationTrait::__sleep public function 1
DependencySerializationTrait::__wakeup public function 2
HorizontalTabs::getInfo public function Returns the element properties for this element. Overrides ElementInterface::getInfo
HorizontalTabs::preRenderGroup public static function Pre render the group to support #group parameter. Overrides RenderElement::preRenderGroup
HorizontalTabs::processGroup public static function Arranges elements into groups. Overrides RenderElement::processGroup
HorizontalTabs::processHorizontalTabs public static function Creates a group formatted as horizontal tabs.
MessengerTrait::$messenger protected property The messenger. 29
MessengerTrait::messenger public function Gets the messenger. 29
MessengerTrait::setMessenger public function Sets the messenger.
PluginBase::$configuration protected property Configuration information passed into the plugin. 1
PluginBase::$pluginDefinition protected property The plugin implementation definition. 1
PluginBase::$pluginId protected property The plugin_id.
PluginBase::DERIVATIVE_SEPARATOR constant A string which is used to separate base plugin IDs from the derivative ID.
PluginBase::getBaseId public function Gets the base_plugin_id of the plugin instance. Overrides DerivativeInspectionInterface::getBaseId
PluginBase::getDerivativeId public function Gets the derivative_id of the plugin instance. Overrides DerivativeInspectionInterface::getDerivativeId
PluginBase::getPluginDefinition public function Gets the definition of the plugin implementation. Overrides PluginInspectionInterface::getPluginDefinition 3
PluginBase::getPluginId public function Gets the plugin_id of the plugin instance. Overrides PluginInspectionInterface::getPluginId
PluginBase::isConfigurable public function Determines if the plugin is configurable.
PluginBase::__construct public function Constructs a \Drupal\Component\Plugin\PluginBase object. 92
RenderElement::preRenderAjaxForm public static function Adds Ajax information about an element to communicate with JavaScript.
RenderElement::processAjaxForm public static function Form element processing handler for the #ajax form property. 1
RenderElement::setAttributes public static function Sets a form element's class attribute. Overrides ElementInterface::setAttributes
StringTranslationTrait::$stringTranslation protected property The string translation service. 1
StringTranslationTrait::formatPlural protected function Formats a string containing a count of items.
StringTranslationTrait::getNumberOfPlurals protected function Returns the number of plurals supported by a given language.
StringTranslationTrait::getStringTranslation protected function Gets the string translation service.
StringTranslationTrait::setStringTranslation public function Sets the string translation service to use. 2
StringTranslationTrait::t protected function Translates a string to the current language or to a given language.