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- <?php
- namespace Drupal\Core\Render\MainContent;
- use Drupal\Core\Ajax\AjaxResponse;
- use Drupal\Core\Ajax\AlertCommand;
- use Drupal\Core\Ajax\InsertCommand;
- use Drupal\Core\Ajax\PrependCommand;
- use Drupal\Core\Render\ElementInfoManagerInterface;
- use Drupal\Core\Render\RendererInterface;
- use Drupal\Core\Routing\RouteMatchInterface;
- use Symfony\Component\HttpFoundation\Request;
- /**
- * Default main content renderer for Ajax requests.
- */
- class AjaxRenderer implements MainContentRendererInterface {
- /**
- * The element info manager.
- *
- * @var \Drupal\Core\Render\ElementInfoManagerInterface
- */
- protected $elementInfoManager;
- /**
- * The renderer.
- *
- * @var \Drupal\Core\Render\RendererInterface
- */
- protected $renderer;
- /**
- * Constructs a new AjaxRenderer instance.
- *
- * @param \Drupal\Core\Render\ElementInfoManagerInterface $element_info_manager
- * The element info manager.
- * @param \Drupal\Core\Render\RendererInterface $renderer
- * The renderer.
- */
- public function __construct(ElementInfoManagerInterface $element_info_manager, RendererInterface $renderer = NULL) {
- $this->elementInfoManager = $element_info_manager;
- if ($renderer === NULL) {
- @trigger_error('The renderer service must be passed to ' . __METHOD__ . ' and will be required before Drupal 9.0.0. See https://www.drupal.org/node/3009400', E_USER_DEPRECATED);
- $renderer = \Drupal::service('renderer');
- }
- $this->renderer = $renderer;
- }
- /**
- * {@inheritdoc}
- */
- public function renderResponse(array $main_content, Request $request, RouteMatchInterface $route_match) {
- $response = new AjaxResponse();
- if (isset($main_content['#type']) && ($main_content['#type'] == 'ajax')) {
- // Complex Ajax callbacks can return a result that contains an error
- // message or a specific set of commands to send to the browser.
- $main_content += $this->elementInfoManager->getInfo('ajax');
- $error = $main_content['#error'];
- if (!empty($error)) {
- // Fall back to some default message otherwise use the specific one.
- if (!is_string($error)) {
- $error = 'An error occurred while handling the request: The server received invalid input.';
- }
- $response->addCommand(new AlertCommand($error));
- }
- }
- $html = $this->renderer->renderRoot($main_content);
- $response->setAttachments($main_content['#attached']);
- // The selector for the insert command is NULL as the new content will
- // replace the element making the Ajax call. The default 'replaceWith'
- // behavior can be changed with #ajax['method'].
- $response->addCommand(new InsertCommand(NULL, $html));
- $status_messages = ['#type' => 'status_messages'];
- $output = $this->renderer->renderRoot($status_messages);
- if (!empty($output)) {
- $response->addCommand(new PrependCommand(NULL, $output));
- }
- return $response;
- }
- /**
- * Wraps \Drupal\Core\Render\RendererInterface::renderRoot().
- *
- * @deprecated in drupal:8.7.0 and is removed from drupal:9.0.0. Use
- * $this->renderer->renderRoot() instead.
- *
- * @see https://www.drupal.org/node/2912696
- */
- protected function drupalRenderRoot(&$elements) {
- @trigger_error('\Drupal\Core\Render\MainContent\AjaxRenderer::drupalRenderRoot() is deprecated in Drupal 8.7.x and will be removed before Drupal 9.0.0. Use $this->renderer->renderRoot() instead. See https://www.drupal.org/node/2912696', E_USER_DEPRECATED);
- return $this->renderer->renderRoot($elements);
- }
- }
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