4 * This file is part of the Symfony package.
6 * (c) Fabien Potencier <fabien@symfony.com>
8 * For the full copyright and license information, please view the LICENSE
9 * file that was distributed with this source code.
12 namespace Symfony\Component\CssSelector\Parser\Tokenizer;
15 * CSS selector tokenizer escaping applier.
17 * This component is a port of the Python cssselect library,
18 * which is copyright Ian Bicking, @see https://github.com/SimonSapin/cssselect.
20 * @author Jean-François Simon <jeanfrancois.simon@sensiolabs.com>
24 class TokenizerEscaping
28 public function __construct(TokenizerPatterns $patterns)
30 $this->patterns = $patterns;
34 * @param string $value
38 public function escapeUnicode($value)
40 $value = $this->replaceUnicodeSequences($value);
42 return preg_replace($this->patterns->getSimpleEscapePattern(), '$1', $value);
46 * @param string $value
50 public function escapeUnicodeAndNewLine($value)
52 $value = preg_replace($this->patterns->getNewLineEscapePattern(), '', $value);
54 return $this->escapeUnicode($value);
58 * @param string $value
62 private function replaceUnicodeSequences($value)
64 return preg_replace_callback($this->patterns->getUnicodeEscapePattern(), function ($match) {
65 $c = hexdec($match[1]);
67 if (0x80 > $c %= 0x200000) {
71 return \chr(0xC0 | $c >> 6).\chr(0x80 | $c & 0x3F);
74 return \chr(0xE0 | $c >> 12).\chr(0x80 | $c >> 6 & 0x3F).\chr(0x80 | $c & 0x3F);