--- /dev/null
+<?php
+
+namespace Drupal\entityqueue\Plugin\Field\FieldWidget;
+
+use Drupal\Component\Utility\Html;
+use Drupal\Component\Utility\NestedArray;
+use Drupal\Core\Entity\Element\EntityAutocomplete;
+use Drupal\Core\Field\FieldItemListInterface;
+use Drupal\Core\Field\FieldStorageDefinitionInterface;
+use Drupal\Core\Field\Plugin\Field\FieldWidget\EntityReferenceAutocompleteWidget;
+use Drupal\Core\Form\FormStateInterface;
+
+/**
+ * Plugin implementation of the 'entityqueue_dragtable' widget.
+ *
+ * @FieldWidget(
+ * id = "entityqueue_dragtable",
+ * label = @Translation("Autocomplete (draggable table) - Experimental"),
+ * description = @Translation("An autocomplete text field with a draggable table."),
+ * field_types = {
+ * "entity_reference"
+ * }
+ * )
+ */
+class EntityqueueDragtableWidget extends EntityReferenceAutocompleteWidget {
+
+ /**
+ * The unique HTML ID of the widget's wrapping element.
+ *
+ * @var string
+ */
+ protected $wrapperId;
+
+ /**
+ * {@inheritdoc}
+ */
+ public function formElement(FieldItemListInterface $items, $delta, array $element, array &$form, FormStateInterface $form_state) {
+ $field_name = $this->fieldDefinition->getName();
+ $parents = $form['#parents'];
+ $referenced_entities = $items->referencedEntities();
+
+ if (isset($referenced_entities[$delta])) {
+ $entity_label = EntityAutocomplete::getEntityLabels([$referenced_entities[$delta]]);
+ $id_prefix = implode('-', array_merge($parents, [$field_name, $delta]));
+
+ $element += [
+ '#type' => 'container',
+ '#attributes' => ['class' => ['form--inline']],
+ 'target_id' => [
+ '#type' => 'item',
+ '#markup' => $entity_label,
+ '#default_value' => !$referenced_entities[$delta]->isNew() ? $referenced_entities[$delta]->id() : NULL,
+ ],
+ 'entity' => [
+ '#type' => 'value',
+ '#default_value' => $referenced_entities[$delta],
+ ],
+ 'remove' => [
+ '#type' => 'submit',
+ '#name' => strtr($id_prefix, '-', '_') . '_remove',
+ '#value' => $this->t('Remove'),
+ '#attributes' => ['class' => ['remove-item-submit', 'align-right']],
+ '#submit' => [[get_class($this), 'removeSubmit']],
+ '#ajax' => [
+ 'callback' => [get_class($this), 'getWidgetElementAjax'],
+ 'wrapper' => $this->getWrapperId(),
+ 'effect' => 'fade',
+ ],
+ ],
+ ];
+ }
+
+ return $element;
+ }
+
+ /**
+ * {@inheritdoc}
+ */
+ protected function formMultipleElements(FieldItemListInterface $items, array &$form, FormStateInterface $form_state) {
+ $field_name = $this->fieldDefinition->getName();
+ $cardinality = $this->fieldDefinition->getFieldStorageDefinition()->getCardinality();
+ $parents = $form['#parents'];
+
+ // Assign a unique identifier to each widget.
+ $id_prefix = implode('-', array_merge($parents, [$field_name]));
+ $wrapper_id = Html::getUniqueId($id_prefix . '-add-more-wrapper');
+ $this->setWrapperId($wrapper_id);
+
+ // Load the items for form rebuilds from the field state as they might not
+ // be in $form_state->getValues() because of validation limitations. Also,
+ // they are only passed in as $items when editing existing entities.
+ $field_state = static::getWidgetState($parents, $field_name, $form_state);
+ if (isset($field_state['items'])) {
+ $items->setValue($field_state['items']);
+ }
+
+ // Lower the 'items_count' field state property in order to prevent the
+ // parent implementation to append an extra empty item.
+ if ($cardinality == FieldStorageDefinitionInterface::CARDINALITY_UNLIMITED) {
+ $field_state['items_count'] = (count($items) > 1) ? count($items) - 1 : 0;
+ static::setWidgetState($parents, $field_name, $form_state, $field_state);
+ }
+
+ $elements = parent::formMultipleElements($items, $form, $form_state);
+
+ if ($elements) {
+ if (isset($elements['add_more'])) {
+ // Update the HTML wrapper ID with the one generated by us.
+ $elements['#prefix'] = '<div id="' . $this->getWrapperId() . '">';
+
+ $add_more_button = $elements['add_more'];
+ $add_more_button['#value'] = $this->t('Add item');
+ $add_more_button['#ajax']['callback'] = [get_class($this), 'getWidgetElementAjax'];
+ $add_more_button['#ajax']['wrapper'] = $this->getWrapperId();
+
+ $elements['add_more'] = [
+ '#type' => 'container',
+ '#tree' => TRUE,
+ '#attributes' => ['class' => ['form--inline']],
+ 'new_item' => parent::formElement($items, -1, [], $form, $form_state),
+ 'submit' => $add_more_button,
+ ];
+ }
+ }
+
+ return $elements;
+ }
+
+ /**
+ * {@inheritdoc}
+ */
+ public static function getWidgetElementAjax(array $form, FormStateInterface $form_state) {
+ $button = $form_state->getTriggeringElement();
+
+ // Go two levels up in the form, to the widgets container.
+ $element = NestedArray::getValue($form, array_slice($button['#array_parents'], 0, -2));
+
+ // Ensure the widget allows adding additional items.
+ if ($element['#cardinality'] != FieldStorageDefinitionInterface::CARDINALITY_UNLIMITED) {
+ return;
+ }
+
+ // Add a DIV around the delta receiving the Ajax effect.
+ $delta = $element['#max_delta'];
+ $element[$delta]['#prefix'] = '<div class="ajax-new-content">' . (isset($element[$delta]['#prefix']) ? $element[$delta]['#prefix'] : '');
+ $element[$delta]['#suffix'] = (isset($element[$delta]['#suffix']) ? $element[$delta]['#suffix'] : '') . '</div>';
+
+ return $element;
+ }
+
+ /**
+ * {@inheritdoc}
+ */
+ public static function addMoreSubmit(array $form, FormStateInterface $form_state) {
+ // During the form rebuild, formElement() will create field item widget
+ // elements using re-indexed deltas, so clear out FormState::$input to
+ // avoid a mismatch between old and new deltas. The rebuilt elements will
+ // have #default_value set appropriately for the current state of the field,
+ // so nothing is lost in doing this.
+ $button = $form_state->getTriggeringElement();
+ $parents = array_slice($button['#parents'], 0, -2);
+ NestedArray::setValue($form_state->getUserInput(), $parents, NULL);
+
+ // Go two levels up in the form, to the widgets container.
+ $element = NestedArray::getValue($form, array_slice($button['#array_parents'], 0, -2));
+ $field_name = $element['#field_name'];
+ $parents = $element['#field_parents'];
+
+ $submitted_values = NestedArray::getValue($form_state->getValues(), array_slice($button['#parents'], 0, -2));
+
+ // Check submitted values for empty items.
+ $new_values = array();
+ foreach ($submitted_values as $delta => $submitted_value) {
+ if ($delta !== 'add_more' && (isset($submitted_value['target_id']) || isset($submitted_value['entity']))) {
+ $new_values[] = $submitted_value;
+ }
+
+ if ($delta === 'add_more' && (isset($submitted_value['new_item']['target_id']) || isset($submitted_value['new_item']['entity']))) {
+ $new_values[] = $submitted_value['new_item'];
+ }
+ }
+
+ // Re-index deltas after removing empty items.
+ $submitted_values = array_values($new_values);
+
+ // Update form_state values.
+ NestedArray::setValue($form_state->getValues(), array_slice($button['#parents'], 0, -2), $submitted_values);
+
+ // Update items.
+ $field_state = static::getWidgetState($parents, $field_name, $form_state);
+ $field_state['items'] = $submitted_values;
+ static::setWidgetState($parents, $field_name, $form_state, $field_state);
+
+ $form_state->setRebuild();
+ }
+
+ /**
+ * Submission handler for the "Remove" button.
+ */
+ public static function removeSubmit(array $form, FormStateInterface $form_state) {
+ $button = $form_state->getTriggeringElement();
+
+ // Go one level up in the form, to the single field item element container.
+ $element = NestedArray::getValue($form, array_slice($button['#array_parents'], 0, -1));
+
+ $form_state->setValueForElement($element, ['target_id' => NULL, 'entity' => NULL]);
+
+ // Call the generic submit handler which takes care of removing the item.
+ static::addMoreSubmit($form, $form_state);
+ }
+
+ /**
+ * Sets the unique HTML ID of the widget's wrapping element.
+ *
+ * @param string $wrapperId
+ * The unique HTML ID.
+ */
+ public function setWrapperId($wrapperId) {
+ if (!$this->wrapperId) {
+ $this->wrapperId = $wrapperId;
+ }
+ }
+
+ /**
+ * Gets the unique HTML ID of the widget's wrapping element.
+ *
+ * @return string
+ * The unique HTML ID.
+ */
+ public function getWrapperId() {
+ return $this->wrapperId;
+ }
+
+}
projects / yaffs-website / blobdiff