/**
* Gets nodes from a list by a given factor.
*
* @param array $nodes List of DOMNode objects
* @param CssParserModelFactor $factor Factor object
*
* @return array of DOMElement objects
*/
private function _getNodesByFactor($nodes, $factor)
{
$ret = array();
foreach ($nodes as $node) {
$items = $factor->filter($node);
$ret = Dom::mergeNodes($ret, $items);
}
return $ret;
}
/**
* Is the next thing a selectorList?
*
* A selectorList is one or more css selectors separated by commas.
*
* For example:
* ```
* div > div.class div#id, div > p, pre
* ```
*
* In the above example, the following strings are terms:
* ```
* div > div.class div
* div > p
* pre
* ```
*
* @return ArrayObject of DOMElement objects
*/
protected function selectorList()
{
$nodes = array();
do {
if (!($selector = $this->is("selector"))) {
// throw new TextParserException("Invalid expression", $this);
break;
}
$nodes = Dom::mergeNodes($nodes, $selector->filter($this->_node));
} while ($this->eq(","));
return new ArrayObject(Dom::sortNodes($nodes));
}
/**
* Finds nodes.
*
* This function is identical to 'query' except it uses XPath expressions, instead of
* CSS selectors.
*
* @param string $expression XPath expression
*
* @return DomNode
*/
public function xpath($expression)
{
$elements = array();
foreach ($this->elements as $element) {
$xpath = new DOMXPath($element->ownerDocument);
$items = $xpath->query($expression, $element);
// converts DOMNodeList to array
$nodes = array();
foreach ($items as $item) {
array_push($nodes, $item);
}
$elements = Dom::mergeNodes($elements, $nodes);
}
$node = new DomNode();
$node->document = $this->document;
$node->elements = $elements;
return $node;
}