pluginreference-2.0.0/src/Plugin/Field/FieldWidget/PluginReferenceAutocompleteWidget.php

<?php

namespace Drupal\pluginreference\Plugin\Field\FieldWidget;

use Drupal\Core\Field\Attribute\FieldWidget;
use Drupal\Core\Field\FieldItemListInterface;
use Drupal\Core\Field\WidgetBase;
use Drupal\Core\Form\FormStateInterface;
use Drupal\Core\StringTranslation\TranslatableMarkup;
use Symfony\Component\Validator\ConstraintViolationInterface;

/**
 * Plugin implementation of the 'plugin_reference_autocomplete' widget.
 */
#[FieldWidget(
  id: 'plugin_reference_autocomplete',
  label: new TranslatableMarkup('Autocomplete'),
  field_types: [
    'plugin_reference',
  ],
)]
class PluginReferenceAutocompleteWidget extends WidgetBase {

  use PluginReferenceConfigurationFormTrait;

  /**
   * {@inheritdoc}
   */
  public static function defaultSettings() {
    return [
      'match_operator' => 'CONTAINS',
      'match_limit' => 10,
    ] + self::configurationDefaultSettings() + parent::defaultSettings();
  }

  /**
   * {@inheritdoc}
   */
  public function settingsForm(array $form, FormStateInterface $form_state) {
    $elements = parent::settingsForm($form, $form_state);

    $elements['match_operator'] = [
      '#type' => 'radios',
      '#title' => t('Autocomplete matching'),
      '#default_value' => $this->getSetting('match_operator'),
      '#options' => $this->getMatchOperatorOptions(),
      '#description' => t('Select the method used to collect autocomplete suggestions. Note that <em>Contains</em> can cause performance issues on sites with thousands of items.'),
    ];
    $elements['match_limit'] = [
      '#type' => 'number',
      '#title' => $this->t('Number of results'),
      '#default_value' => $this->getSetting('match_limit'),
      '#min' => 0,
      '#description' => $this->t('The number of suggestions that will be listed. Use <em>0</em> to remove the limit.'),
    ];

    return $elements + $this->configurationSettingsForm($form, $form_state);
  }

  /**
   * {@inheritdoc}
   */
  public function settingsSummary() {
    $summary = parent::settingsSummary();
    $operators = $this->getMatchOperatorOptions();
    $summary[] = t('Autocomplete matching: @match_operator', ['@match_operator' => $operators[$this->getSetting('match_operator')]]);
    $size = $this->getSetting('match_limit') ?: $this->t('unlimited');
    $summary[] = $this->t('Autocomplete suggestion list size: @size', ['@size' => $size]);

    return $summary + $this->configurationSettingsSummary();
  }

  /**
   * {@inheritdoc}
   */
  public function formElement(FieldItemListInterface $items, $delta, array $element, array &$form, FormStateInterface $form_state) {
    // Append the match operation to the selection settings.
    $selection_settings = $this->getFieldSetting('handler_settings') + [
      'match_operator' => $this->getSetting('match_operator'),
      'match_limit' => $this->getSetting('match_limit'),
    ];

    $element['plugin_id'] = [
      '#type' => 'plugin_autocomplete',
      '#target_type' => $this->getFieldSetting('target_type'),
      '#selection_handler' => $this->getFieldSetting('handler'),
      '#selection_settings' => $selection_settings,
      '#validate_reference' => FALSE,
      '#default_value' => $items[$delta]->plugin_id,
    ] + $element;

    return $this->singleConfigurationFormElement($items, $delta, $element, $form, $form_state);
  }

  /**
   * {@inheritdoc}
   */
  public function errorElement(array $element, ConstraintViolationInterface $error, array $form, FormStateInterface $form_state) {
    return $element['plugin_id'];
  }

  /**
   * Returns the value of a setting for the plugin reference selection handler.
   *
   * @param string $setting_name
   *   The setting name.
   *
   * @return mixed
   *   The setting value.
   */
  protected function getSelectionHandlerSetting($setting_name) {
    $settings = $this->getFieldSetting('handler_settings');
    return $settings[$setting_name] ?? NULL;
  }

  /**
   * Returns the options for the match operator.
   *
   * @return array
   *   List of options.
   */
  protected function getMatchOperatorOptions() {
    return [
      'STARTS_WITH' => t('Starts with'),
      'CONTAINS' => t('Contains'),
    ];
  }

}