/**
* An utility method that simplifies inserting the text to the XML
* tree. Depending on the last child type, it can create a new text
* node or add the text to the existing one.
*
* @internal
* @param Opt_Xml_Node $current The currently built XML node.
* @param String|Opt_Xml_Node $text The text or the expression node.
* @return Opt_Xml_Node The current XML node.
*/
protected function _treeTextAppend($current, $text)
{
$last = $current->getLastChild();
if (!is_object($last) || !$last instanceof Opt_Xml_Text) {
if (!is_object($text)) {
$node = new Opt_Xml_Text($text);
} else {
$node = new Opt_Xml_Text();
$node->appendChild($text);
}
$current->appendChild($node);
} else {
if (!is_object($text)) {
$last->appendData($text);
} else {
$last->appendChild($text);
}
}
return $current;
}