/**
* Highlights a text node
*
* @param DOMNode $node The text node to highlight
*/
protected function doHighlightTextNode(DOMNode $node)
{
foreach ($this->tokenize($node->textContent) as $token) {
$node->splitText($token->getEnd());
$matched = $node->splitText($token->getStart());
$highlighted = $this->document->createDocumentFragment();
$highlighted->appendXML($token->getKeyword()->getHighlighter()->highlight($token->getText()));
$node->parentNode->replaceChild($highlighted, $matched);
}
}
