/**
  * Safely sanitise html content, if enabled
  *
  * @param string $content Raw html
  * @return string Safely sanitised html
  */
 protected function sanitiseContent($content)
 {
     // Check if sanitisation is enabled
     if (!HtmlEditorField::config()->sanitise_server_side) {
         return $content;
     }
     // Perform sanitisation
     $htmlValue = Injector::inst()->create('HTMLValue', $content);
     $santiser = Injector::inst()->create('HtmlEditorSanitiser', $this->getEditorConfig());
     $santiser->sanitise($htmlValue);
     return $htmlValue->getContent();
 }