abstract class DraggableListBuilder in Drupal 9

Same name and namespace in other branches

8 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

class \Drupal\Core\Entity\EntityHandlerBase uses DependencySerializationTrait, StringTranslationTrait
- class \Drupal\Core\Entity\EntityListBuilder implements EntityHandlerInterface, EntityListBuilderInterface uses MessengerTrait, RedirectDestinationTrait
  - class \Drupal\Core\Config\Entity\ConfigEntityListBuilder
    class \Drupal\Core\Config\Entity\DraggableListBuilder implements FormInterface

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;

  /**
   * 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');
    }
    $this->limit = FALSE;
  }

  /**
   * {@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'] = [
          '#plain_text' => $row['label'],
        ];
      }
      if (isset($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

Name	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::$_entityStorages	protected	property
DependencySerializationTrait::$_serviceIds	protected	property
DependencySerializationTrait::__sleep	public	function		2
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::$formBuilder	protected	property	The form builder.
DraggableListBuilder::$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::$moduleHandler	protected	property	The module handler to invoke hooks on.	5
EntityHandlerBase::moduleHandler	protected	function	Gets the module handler.	5
EntityHandlerBase::setModuleHandler	public	function	Sets the module handler for this handler.
EntityListBuilder::$entityType	protected	property	Information about the entity type.
EntityListBuilder::$entityTypeId	protected	property	The entity type ID.
EntityListBuilder::$limit	protected	property	The number of entities to list per page, or FALSE to list all entities.
EntityListBuilder::$storage	protected	property	The entity storage class.	1
EntityListBuilder::buildOperations	public	function	Builds a renderable list of operation links for the entity.	2
EntityListBuilder::createInstance	public static	function	Instantiates a new instance of this entity handler. Overrides EntityHandlerInterface::createInstance	20
EntityListBuilder::ensureDestination	protected	function	Ensures that a destination is present on the given URL.
EntityListBuilder::getEntityIds	protected	function	Loads entity IDs using a pager sorted by the entity id.	4
EntityListBuilder::getOperations	public	function	Provides an array of information to build a list of operation links. Overrides EntityListBuilderInterface::getOperations	2
EntityListBuilder::getStorage	public	function	Gets the entity storage. Overrides EntityListBuilderInterface::getStorage
EntityListBuilder::getTitle	protected	function	Gets the title of the page.	1
FormInterface::getFormId	public	function	Returns a unique string identifying the form.	264
MessengerTrait::$messenger	protected	property	The messenger.	27
MessengerTrait::messenger	public	function	Gets the messenger.	27
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.	4
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.

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abstract class DraggableListBuilder in Drupal 9

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