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<?php |
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|
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/* |
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* This file is part of the Symfony package. |
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* |
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* (c) Fabien Potencier <fabien@symfony.com> |
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* |
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* For the full copyright and license information, please view the LICENSE |
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* file that was distributed with this source code. |
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*/ |
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|
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namespace Symfony\Component\CssSelector\Parser\Tokenizer; |
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|
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/** |
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* CSS selector tokenizer escaping applier. |
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* |
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* This component is a port of the Python cssselect library, |
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* which is copyright Ian Bicking, @see https://github.com/SimonSapin/cssselect. |
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* |
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* @author Jean-François Simon <jeanfrancois.simon@sensiolabs.com> |
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* |
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* @internal |
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*/ |
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class TokenizerEscaping |
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{ |
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public function __construct( |
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private TokenizerPatterns $patterns, |
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) { |
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} |
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|
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public function escapeUnicode(string $value): string |
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{ |
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$value = $this->replaceUnicodeSequences($value); |
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|
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return preg_replace($this->patterns->getSimpleEscapePattern(), '$1', $value); |
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} |
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|
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public function escapeUnicodeAndNewLine(string $value): string |
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{ |
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$value = preg_replace($this->patterns->getNewLineEscapePattern(), '', $value); |
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|
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return $this->escapeUnicode($value); |
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} |
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|
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private function replaceUnicodeSequences(string $value): string |
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{ |
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return preg_replace_callback($this->patterns->getUnicodeEscapePattern(), static function ($match) { |
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$c = hexdec($match[1]); |
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|
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if (0x80 > $c %= 0x200000) { |
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return \chr($c); |
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} |
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if (0x800 > $c) { |
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return \chr(0xC0 | $c >> 6).\chr(0x80 | $c & 0x3F); |
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} |
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if (0x10000 > $c) { |
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return \chr(0xE0 | $c >> 12).\chr(0x80 | $c >> 6 & 0x3F).\chr(0x80 | $c & 0x3F); |
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} |
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|
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return ''; |
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}, $value); |
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} |
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} |
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|
