Просмотр файла vendor/symfony/css-selector/Parser/Tokenizer/TokenizerEscaping.php

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  1. <?php
  2.  
  3. /*
  4. * This file is part of the Symfony package.
  5. *
  6. * (c) Fabien Potencier <fabien@symfony.com>
  7. *
  8. * For the full copyright and license information, please view the LICENSE
  9. * file that was distributed with this source code.
  10. */
  11.  
  12. namespace Symfony\Component\CssSelector\Parser\Tokenizer;
  13.  
  14. /**
  15. * CSS selector tokenizer escaping applier.
  16. *
  17. * This component is a port of the Python cssselect library,
  18. * which is copyright Ian Bicking, @see https://github.com/SimonSapin/cssselect.
  19. *
  20. * @author Jean-François Simon <jeanfrancois.simon@sensiolabs.com>
  21. *
  22. * @internal
  23. */
  24. class TokenizerEscaping
  25. {
  26. private $patterns;
  27.  
  28. public function __construct(TokenizerPatterns $patterns)
  29. {
  30. $this->patterns = $patterns;
  31. }
  32.  
  33. public function escapeUnicode(string $value): string
  34. {
  35. $value = $this->replaceUnicodeSequences($value);
  36.  
  37. return preg_replace($this->patterns->getSimpleEscapePattern(), '$1', $value);
  38. }
  39.  
  40. public function escapeUnicodeAndNewLine(string $value): string
  41. {
  42. $value = preg_replace($this->patterns->getNewLineEscapePattern(), '', $value);
  43.  
  44. return $this->escapeUnicode($value);
  45. }
  46.  
  47. private function replaceUnicodeSequences(string $value): string
  48. {
  49. return preg_replace_callback($this->patterns->getUnicodeEscapePattern(), function ($match) {
  50. $c = hexdec($match[1]);
  51.  
  52. if (0x80 > $c %= 0x200000) {
  53. return \chr($c);
  54. }
  55. if (0x800 > $c) {
  56. return \chr(0xC0 | $c >> 6).\chr(0x80 | $c & 0x3F);
  57. }
  58. if (0x10000 > $c) {
  59. return \chr(0xE0 | $c >> 12).\chr(0x80 | $c >> 6 & 0x3F).\chr(0x80 | $c & 0x3F);
  60. }
  61.  
  62. return '';
  63. }, $value);
  64. }
  65. }