function detect_applicable_tag($selector)
{
switch (selector_get_type($selector)) {
case SELECTOR_TAG:
return $selector[1];
case SELECTOR_SEQUENCE:
foreach ($selector[1] as $subselector) {
$tag = $this->detect_applicable_tag($subselector);
if ($tag) {
return $tag;
}
}
return null;
default:
return null;
}
}
function css_find_pseudoelement($selector)
{
$selector_type = selector_get_type($selector);
switch ($selector_type) {
case SELECTOR_PSEUDOELEMENT_BEFORE:
case SELECTOR_PSEUDOELEMENT_AFTER:
return $selector_type;
case SELECTOR_SEQUENCE:
foreach ($selector[1] as $subselector) {
$pe = css_find_pseudoelement($subselector);
if (!is_null($pe)) {
return $pe;
}
}
return null;
default:
return null;
}
}
