private function saveBlockData($page_id, $block_id, $section_id, $content)
 {
     // New page, don't save anything.
     if (empty($page_id)) {
         $this->setUndoSession(0, $section_id, $content);
         return;
     }
     PHPWS_Core::initModClass('pagesmith', 'PS_Text.php');
     PHPWS_Core::initModClass('pagesmith', 'PS_Page.php');
     $page = new PS_Page($page_id);
     $block = new PS_Text($block_id);
     $block->setContent($content);
     $block->save($page->key_id);
 }