You are here

abstract class DraggableListBuilder in Drupal 8

Same name and namespace in other branches
  1. 9 core/lib/Drupal/Core/Config/Entity/DraggableListBuilder.php \Drupal\Core\Config\Entity\DraggableListBuilder
  2. 10 core/lib/Drupal/Core/Config/Entity/DraggableListBuilder.php \Drupal\Core\Config\Entity\DraggableListBuilder

Defines a class to build a draggable listing of configuration entities.

Hierarchy

Expanded class hierarchy of DraggableListBuilder

5 files declare their use of DraggableListBuilder
FilterFormatListBuilder.php in core/modules/filter/src/FilterFormatListBuilder.php
LanguageListBuilder.php in core/modules/language/src/LanguageListBuilder.php
RoleListBuilder.php in core/modules/user/src/RoleListBuilder.php
SearchPageListBuilder.php in core/modules/search/src/SearchPageListBuilder.php
VocabularyListBuilder.php in core/modules/taxonomy/src/VocabularyListBuilder.php

File

core/lib/Drupal/Core/Config/Entity/DraggableListBuilder.php, line 14

Namespace

Drupal\Core\Config\Entity
View source
abstract class DraggableListBuilder extends ConfigEntityListBuilder implements FormInterface {

  /**
   * The key to use for the form element containing the entities.
   *
   * @var string
   */
  protected $entitiesKey = 'entities';

  /**
   * The entities being listed.
   *
   * @var \Drupal\Core\Entity\EntityInterface[]
   */
  protected $entities = [];

  /**
   * Name of the entity's weight field or FALSE if no field is provided.
   *
   * @var string|bool
   */
  protected $weightKey = FALSE;

  /**
   * {@inheritdoc}
   */
  protected $limit = FALSE;

  /**
   * The form builder.
   *
   * @var \Drupal\Core\Form\FormBuilderInterface
   */
  protected $formBuilder;

  /**
   * {@inheritdoc}
   */
  public function __construct(EntityTypeInterface $entity_type, EntityStorageInterface $storage) {
    parent::__construct($entity_type, $storage);

    // Check if the entity type supports weighting.
    if ($this->entityType
      ->hasKey('weight')) {
      $this->weightKey = $this->entityType
        ->getKey('weight');
    }
  }

  /**
   * {@inheritdoc}
   */
  public function buildHeader() {
    $header = [];
    if (!empty($this->weightKey)) {
      $header['weight'] = t('Weight');
    }
    return $header + parent::buildHeader();
  }

  /**
   * {@inheritdoc}
   */
  public function buildRow(EntityInterface $entity) {
    $row = [];
    if (!empty($this->weightKey)) {

      // Override default values to markup elements.
      $row['#attributes']['class'][] = 'draggable';
      $row['#weight'] = $entity
        ->get($this->weightKey);

      // Add weight column.
      $row['weight'] = [
        '#type' => 'weight',
        '#title' => t('Weight for @title', [
          '@title' => $entity
            ->label(),
        ]),
        '#title_display' => 'invisible',
        '#default_value' => $entity
          ->get($this->weightKey),
        '#attributes' => [
          'class' => [
            'weight',
          ],
        ],
      ];
    }
    return $row + parent::buildRow($entity);
  }

  /**
   * {@inheritdoc}
   */
  public function render() {
    if (!empty($this->weightKey)) {
      return $this
        ->formBuilder()
        ->getForm($this);
    }
    return parent::render();
  }

  /**
   * {@inheritdoc}
   */
  public function buildForm(array $form, FormStateInterface $form_state) {
    $form[$this->entitiesKey] = [
      '#type' => 'table',
      '#header' => $this
        ->buildHeader(),
      '#empty' => t('There are no @label yet.', [
        '@label' => $this->entityType
          ->getPluralLabel(),
      ]),
      '#tabledrag' => [
        [
          'action' => 'order',
          'relationship' => 'sibling',
          'group' => 'weight',
        ],
      ],
    ];
    $this->entities = $this
      ->load();
    $delta = 10;

    // Change the delta of the weight field if have more than 20 entities.
    if (!empty($this->weightKey)) {
      $count = count($this->entities);
      if ($count > 20) {
        $delta = ceil($count / 2);
      }
    }
    foreach ($this->entities as $entity) {
      $row = $this
        ->buildRow($entity);
      if (isset($row['label'])) {
        $row['label'] = [
          '#markup' => $row['label'],
        ];
      }
      if (isset($row['weight'])) {
        $row['weight']['#delta'] = $delta;
      }
      $form[$this->entitiesKey][$entity
        ->id()] = $row;
    }
    $form['actions']['#type'] = 'actions';
    $form['actions']['submit'] = [
      '#type' => 'submit',
      '#value' => t('Save'),
      '#button_type' => 'primary',
    ];
    return $form;
  }

  /**
   * {@inheritdoc}
   */
  public function validateForm(array &$form, FormStateInterface $form_state) {

    // No validation.
  }

  /**
   * {@inheritdoc}
   */
  public function submitForm(array &$form, FormStateInterface $form_state) {
    foreach ($form_state
      ->getValue($this->entitiesKey) as $id => $value) {
      if (isset($this->entities[$id]) && $this->entities[$id]
        ->get($this->weightKey) != $value['weight']) {

        // Save entity only when its weight was changed.
        $this->entities[$id]
          ->set($this->weightKey, $value['weight']);
        $this->entities[$id]
          ->save();
      }
    }
  }

  /**
   * Returns the form builder.
   *
   * @return \Drupal\Core\Form\FormBuilderInterface
   *   The form builder.
   */
  protected function formBuilder() {
    if (!$this->formBuilder) {
      $this->formBuilder = \Drupal::formBuilder();
    }
    return $this->formBuilder;
  }

}

Members

Namesort descending Modifiers Type Description Overrides
ConfigEntityListBuilder::getDefaultOperations public function Gets this list's default operations. Overrides EntityListBuilder::getDefaultOperations 15
ConfigEntityListBuilder::load public function Loads entities of this type from storage for listing. Overrides EntityListBuilder::load 7
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
DraggableListBuilder::$entities protected property The entities being listed. 1
DraggableListBuilder::$entitiesKey protected property The key to use for the form element containing the entities. 3
DraggableListBuilder::$formBuilder protected property The form builder.
DraggableListBuilder::$limit protected property The number of entities to list per page, or FALSE to list all entities. Overrides EntityListBuilder::$limit
DraggableListBuilder::$weightKey protected property Name of the entity's weight field or FALSE if no field is provided.
DraggableListBuilder::buildForm public function Form constructor. Overrides FormInterface::buildForm 4
DraggableListBuilder::buildHeader public function Builds the header row for the entity listing. Overrides EntityListBuilder::buildHeader 5
DraggableListBuilder::buildRow public function Builds a row for an entity in the entity listing. Overrides EntityListBuilder::buildRow 5
DraggableListBuilder::formBuilder protected function Returns the form builder.
DraggableListBuilder::render public function Builds the entity listing as renderable array for table.html.twig. Overrides EntityListBuilder::render 1
DraggableListBuilder::submitForm public function Form submission handler. Overrides FormInterface::submitForm 5
DraggableListBuilder::validateForm public function Form validation handler. Overrides FormInterface::validateForm 2
DraggableListBuilder::__construct public function Constructs a new EntityListBuilder object. Overrides EntityListBuilder::__construct 5
EntityHandlerBase::$moduleHandler protected property The module handler to invoke hooks on. 2
EntityHandlerBase::moduleHandler protected function Gets the module handler. 2
EntityHandlerBase::setModuleHandler public function Sets the module handler for this handler.
EntityListBuilder::$entityType protected property Information about the entity type.
EntityListBuilder::$entityTypeId protected property The entity type ID.
EntityListBuilder::$storage protected property The entity storage class. 1
EntityListBuilder::buildOperations public function Builds a renderable list of operation links for the entity. 2
EntityListBuilder::createInstance public static function Instantiates a new instance of this entity handler. Overrides EntityHandlerInterface::createInstance 20
EntityListBuilder::ensureDestination protected function Ensures that a destination is present on the given URL.
EntityListBuilder::getEntityIds protected function Loads entity IDs using a pager sorted by the entity id. 4
EntityListBuilder::getLabel Deprecated protected function Gets the label of an entity.
EntityListBuilder::getOperations public function Provides an array of information to build a list of operation links. Overrides EntityListBuilderInterface::getOperations 2
EntityListBuilder::getStorage public function Gets the entity storage. Overrides EntityListBuilderInterface::getStorage
EntityListBuilder::getTitle protected function Gets the title of the page. 1
FormInterface::getFormId public function Returns a unique string identifying the form. 236
MessengerTrait::$messenger protected property The messenger. 29
MessengerTrait::messenger public function Gets the messenger. 29
MessengerTrait::setMessenger public function Sets the messenger.
RedirectDestinationTrait::$redirectDestination protected property The redirect destination service. 1
RedirectDestinationTrait::getDestinationArray protected function Prepares a 'destination' URL query parameter for use with \Drupal\Core\Url.
RedirectDestinationTrait::getRedirectDestination protected function Returns the redirect destination service.
RedirectDestinationTrait::setRedirectDestination public function Sets the redirect destination service.
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.