/**
* Parses the css code converting to a Css object with all selectors, properties and values.
*
* @param string $string_code The css code to parse
*
* @return Stylecow\Css The parsed css code
*/
private static function parse($string_code)
{
$Css = new Css();
while ($string_code) {
$pos = strpos($string_code, '{');
$pos2 = strpos($string_code, ';');
if ($pos2 !== false && $pos2 < $pos) {
$Css->addChild(new Css(Selector::createFromString(substr($string_code, 0, $pos2))));
$string_code = trim(substr($string_code, $pos2 + 1));
continue;
}
if ($pos === false) {
break;
}
$selector = substr($string_code, 0, $pos);
$string_code = trim(substr($string_code, $pos + 1));
$length = strlen($string_code);
$in = 1;
for ($n = 0; $n <= $length; $n++) {
$letter = $string_code[$n];
if ($letter === '{') {
$in++;
continue;
}
if ($letter !== '}' || --$in) {
continue;
}
$Child = $Css->addChild(new Css(Selector::createFromString($selector)));
$string_piece = $n === 0 ? '' : trim(substr($string_code, 0, $n - 1));
$string_code = trim(substr($string_code, $n + 1));
$pos = strpos($string_piece, '{');
if ($pos === false) {
$properties_string = $string_piece;
$content_string = '';
} else {
$pos = strrpos(substr($string_piece, 0, $pos), ';');
if ($pos !== false) {
$properties_string = trim(substr($string_piece, 0, $pos + 1));
$content_string = trim(substr($string_piece, $pos + 1));
} else {
$properties_string = '';
$content_string = $string_piece;
}
}
if ($properties_string) {
foreach (self::explodeTrim(';', $properties_string) as $property) {
$Child->addProperty(Property::createFromString($property));
}
}
if ($content_string) {
foreach (self::parse($content_string) as $child) {
$Child->addChild($child);
}
}
break;
}
}
return $Css;
}
