File Content: TokenizerEscaping.php <?php /* * This file is part of the Symfony package. * * (c) Fabien Potencier <fabien@symfony.com> * * 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 cssselect library, * which is copyright Ian Bicking, @see https://github.com/SimonSapin/cssselect. * * @author Jean-François Simon <jeanfrancois.simon@sensiolabs.com> * * @internal */ 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($this->patterns->getUnicodeEscapePattern(), function ($match) { $c = hexdec($match[1]); if (0x80 > $c %= 0x200000) { return chr($c); } if (0x800 > $c) { return chr(0xC0 | $c >> 6).chr(0x80 | $c & 0x3F); } if (0x10000 > $c) { return chr(0xE0 | $c >> 12).chr(0x80 | $c >> 6 & 0x3F).chr(0x80 | $c & 0x3F); } }, $value); } } Submit