function match_selector($selector, $root)
{
switch ($selector[0]) {
case SELECTOR_TAG:
if ($selector[1] == strtolower($root->tagname())) {
return true;
}
break;
case SELECTOR_ID:
if ($selector[1] == strtolower($root->get_attribute('id'))) {
return true;
}
break;
case SELECTOR_CLASS:
if (node_have_class($root, $selector[1])) {
return true;
}
if ($selector[1] == strtolower($root->get_attribute('class'))) {
return true;
}
break;
case SELECTOR_TAG_CLASS:
if (node_have_class($root, $selector[2]) && $selector[1] == strtolower($root->tagname())) {
return true;
}
break;
case SELECTOR_SEQUENCE:
foreach ($selector[1] as $subselector) {
if (!match_selector($subselector, $root)) {
return false;
}
}
return true;
case SELECTOR_PARENT:
case SELECTOR_PARENT_LOW_PRIORITY:
$node = $root->parent();
while ($node && $node->node_type() == XML_ELEMENT_NODE) {
if (match_selector($selector[1], $node)) {
return true;
}
$node = $node->parent();
}
return false;
case SELECTOR_DIRECT_PARENT:
$node = $root->parent();
if ($node && $node->node_type() == XML_ELEMENT_NODE) {
if (match_selector($selector[1], $node)) {
return true;
}
}
return false;
case SELECTOR_ATTR:
$attr_name = $selector[1];
return $root->has_attribute($attr_name);
case SELECTOR_ATTR_VALUE:
// Note that CSS 2.1 standard does not says strictly if attribute case
// is significiant:
// """
// Attribute values must be identifiers or strings. The case-sensitivity of attribute names and
// values in selectors depends on the document language.
// """
// As we've met several problems with pages having INPUT type attributes in upper (or ewen worse - mixed!)
// case, the following decision have been accepted: attribute values should not be case-sensitive
$attr_name = $selector[1];
$attr_value = $selector[2];
if (!$root->has_attribute($attr_name)) {
return false;
}
return strtolower($root->get_attribute($attr_name)) == strtolower($attr_value);
case SELECTOR_ATTR_VALUE_WORD:
// Note that CSS 2.1 standard does not says strictly if attribute case
// is significiant:
// """
// Attribute values must be identifiers or strings. The case-sensitivity of attribute names and
// values in selectors depends on the document language.
// """
// As we've met several problems with pages having INPUT type attributes in upper (or ewen worse - mixed!)
// case, the following decision have been accepted: attribute values should not be case-sensitive
$attr_name = $selector[1];
$attr_value = $selector[2];
if (!$root->has_attribute($attr_name)) {
return false;
}
$words = preg_split("/\\s+/", $root->get_attribute($attr_name));
foreach ($words as $word) {
if (strtolower($word) == strtolower($attr_value)) {
return true;
}
}
return false;
case SELECTOR_PSEUDOCLASS_LINK:
return $root->tagname() == "a" && $root->has_attribute('href');
case SELECTOR_PSEUDOCLASS_LINK_LOW_PRIORITY:
return $root->tagname() == "a" && $root->has_attribute('href');
// Note that :before and :after always match
// Note that :before and :after always match
case SELECTOR_PSEUDOELEMENT_BEFORE:
return true;
case SELECTOR_PSEUDOELEMENT_AFTER:
return true;
case SELECTOR_LANGUAGE:
// FIXME: determine the document language
return true;
case SELECTOR_ANY:
return true;
}
return false;
}
function match($root)
{
return match_selector($this->selector, $root);
}
