* * For the full copyright and license information, please view the LICENSE * file that was distributed with this source code. */ namespace Symfony\Component\CssSelector\Parser\Tokenizer; /** * CSS selector tokenizer escaping applier. * * This component is a port of the Python cssselector library, * which is copyright Ian Bicking, @see https://github.com/SimonSapin/cssselect. * * @author Jean-François Simon */ class TokenizerEscaping { /** * @var TokenizerPatterns */ private $patterns; /** * @param TokenizerPatterns $patterns */ public function __construct(TokenizerPatterns $patterns) { $this->patterns = $patterns; } /** * @param string $value * * @return string */ public function escapeUnicode($value) { $value = $this->replaceUnicodeSequences($value); return preg_replace($this->patterns->getSimpleEscapePattern(), '$1', $value); } /** * @param string $value * * @return string */ public function escapeUnicodeAndNewLine($value) { $value = preg_replace($this->patterns->getNewLineEscapePattern(), '', $value); return $this->escapeUnicode($value); } /** * @param string $value * * @return string */ private function replaceUnicodeSequences($value) { return preg_replace_callback($this->patterns->getUnicodeEscapePattern(), function (array $match) { $code = $match[1]; if (bin2hex($code) > 0xFFFD) { $code = '\\FFFD'; } return mb_convert_encoding(pack('H*', $code), 'UTF-8', 'UCS-2BE'); }, $value); } }