/**
* Rollback document $steps number of revisions.
* This method must be invoked before any changes, applied to the document.
* Otherwise behavior is undefined.
*
* @param integer $steps
*/
public function rollback($steps)
{
for ($count = 0; $count < $steps; $count++) {
if ($this->_trailer->getPrev() !== null && $this->_trailer->getPrev()->Root !== null) {
$this->_trailer = $this->_trailer->getPrev();
} else {
break;
}
}
$this->_objFactory->setObjectCount($this->_trailer->Size->value);
// Mark content as modified to force new trailer generation at render time
$this->_trailer->Root->touch();
$this->pages = array();
$this->_loadPages($this->_trailer->Root->Pages);
}
