/**
* Returns the root container of the given page
*
* When rendering a container, the render method still store the given
* container as the root container, and unset it when done rendering. This
* makes sure finder methods will not traverse above the container given
* to the render method.
*
* @param Zend_Navigaiton_Page $page page to find root for
* @return \Zend\Navigation\Container the root container of the given page
*/
protected function _findRoot(AbstractPage $page)
{
if ($this->_root) {
return $this->_root;
}
$root = $page;
while ($parent = $page->getParent()) {
$root = $parent;
if ($parent instanceof AbstractPage) {
$page = $parent;
} else {
break;
}
}
return $root;
}
