Issue #3423480 by a.dmitriiev: Option not to change url when facets, filters, pager is changed

Closes #3423480

modules/ui/src/Entity/SearchApiEndpoint.php

@@ -36,6 +36,13 @@ class SearchApiEndpoint extends BaseSearchApiEndpoint implements SearchApiEndpoi
    */
   protected $elementsCollection;
 
+  /**
+   * The state manager.
+   *
+   * @var string
+   */
+  protected $state_manager = 'url';
+
   /**
    * Returns the ui elements plugin manager.
    *
@@ -117,6 +124,20 @@ class SearchApiEndpoint extends BaseSearchApiEndpoint implements SearchApiEndpoi
     return $this->layout;
   }
 
+  /**
+   * {@inheritdoc}
+   */
+  public function getStateManager() {
+    return $this->state_manager;
+  }
+
+  /**
+   * {@inheritdoc}
+   */
+  public function setStateManager($state_manager) {
+    $this->state_manager = $state_manager;
+  }
+
   /**
    * {@inheritdoc}
    */
@@ -172,6 +193,7 @@ class SearchApiEndpoint extends BaseSearchApiEndpoint implements SearchApiEndpoi
         'id' => $this->getLayout(),
         'regions' => $regions,
       ],
+      'state_manager' => $this->getStateManager(),
     ];
     if ($autocomplete = $this->getAutocomplete()) {
       $autocomplete_url = Url::fromRoute('search_api_autocomplete.autocomplete', ['search_api_autocomplete_search' => $autocomplete->id()])->setAbsolute($absolute_urls)->toString(TRUE);