TokenizerEscaping.php in Zircon Profile 8

Namespace

Symfony\Component\CssSelector\Parser\Tokenizer

File

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

<?php

/*
 * This file is part of the Symfony package.
 *
 * (c) Fabien Potencier <[e-mail]>
 *
 * 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 <[e-mail]>
 */
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);
  }

}

Classes

Name	Description
TokenizerEscaping	CSS selector tokenizer escaping applier.