public function OverlaySubscriber::onResponse

Performs end of request tasks.

When viewing an overlay child page, check if we need to trigger a refresh of the supplemental regions of the overlay on the next page request.

File

drupal/core/modules/overlay/lib/Drupal/overlay/EventSubscriber/OverlaySubscriber.php, line 118

Contains \Drupal\overlay\EventSubscriber\OverlaySubscriber.

Class

OverlaySubscriber

Overlay subscriber for controller requests.

Namespace

Code

public function onResponse(FilterResponseEvent $event) {

  // Check that we are in an overlay child page.
  if (overlay_get_mode() == 'child') {

    // Load any markup that was stored earlier in the page request, via calls
    // to overlay_store_rendered_content(). If none was stored, this is not a
    // page request where we expect any changes to the overlay supplemental
    // regions to have occurred, so we do not need to proceed any further.
    $original_markup = overlay_get_rendered_content();
    if (!empty($original_markup)) {

      // Compare the original markup to the current markup that we get from
      // rendering each overlay supplemental region now. If they don't match,
      // something must have changed, so we request a refresh of that region
      // within the parent window on the next page request.
      foreach (overlay_supplemental_regions() as $region) {
        if (!isset($original_markup[$region]) || $original_markup[$region] != overlay_render_region($region)) {
          overlay_request_refresh($region);
        }
      }
    }
  }
}