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📄 Tokenizer.php(1.99 KB)
📄 TokenizerEscaping.php(1.69 KB)
📄 TokenizerPatterns.php(2.8 KB)

Editing: 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
{
    public function __construct(
        private TokenizerPatterns $patterns,
    ) {
    }

public function escapeUnicode(string $value): string
    {
        $value = $this->replaceUnicodeSequences($value);

return preg_replace($this->patterns->getSimpleEscapePattern(), '$1', $value);
    }

public function escapeUnicodeAndNewLine(string $value): string
    {
        $value = preg_replace($this->patterns->getNewLineEscapePattern(), '', $value);

return $this->escapeUnicode($value);
    }

private function replaceUnicodeSequences(string $value): string
    {
        return preg_replace_callback($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);
            }

return '';
        }, $value);
    }
}

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