geolocation-8.x-3.x-dev/modules/geolocation_geometry/src/Plugin/geolocation/Location/GeometryViewsProximityFilter.php

<?php

namespace Drupal\geolocation_geometry\Plugin\geolocation\Location;

use Drupal\geolocation\Attribute\Location;
use Drupal\geolocation\Plugin\geolocation\Location\ViewsProximityFilter;

/**
 * Derive center from proximity filter.
 */
#[Location(
  id: 'geometry_views_proximity_filter',
  name: new \Drupal\Core\StringTranslation\TranslatableMarkup('Geometry Proximity filter'),
  description: new \Drupal\Core\StringTranslation\TranslatableMarkup('Set map center from geometry proximity filter.')
)]
class GeometryViewsProximityFilter extends ViewsProximityFilter {

  /**
   * {@inheritdoc}
   */
  public function getAvailableLocationOptions(array $context = []): array {
    $options = [];

    if ($context['views_filter'] ?? FALSE) {
      return $options;
    }

    if ($displayHandler = self::getViewsDisplayHandler($context)) {
      /** @var \Drupal\views\Plugin\views\filter\FilterPluginBase $filter */
      foreach ($displayHandler->getHandlers('filter') as $delta => $filter) {
        if (
          $filter->getPluginId() === 'geolocation_geometry_filter_proximity'
          && $filter !== $context['views_filter']
        ) {
          $options[$delta] = $this->t('Geo Proximity filter') . ' - ' . $filter->adminLabel();
        }
      }
    }

    return $options;
  }

}