class TokenizerEscaping in Zircon Profile 8

CSS selector tokenizer escaping applier.

This component is a port of the Python cssselect library, which is copyright Ian Bicking, @author Jean-François Simon <[e-mail]>

Hierarchy

• class \Symfony\Component\CssSelector\Parser\Tokenizer\TokenizerEscaping

See also

https://github.com/SimonSapin/cssselect.

6 files declare their use of TokenizerEscaping

HashHandler.php in vendor/symfony/css-selector/Parser/Handler/HashHandler.php

HashHandlerTest.php in vendor/symfony/css-selector/Tests/Parser/Handler/HashHandlerTest.php

IdentifierHandler.php in vendor/symfony/css-selector/Parser/Handler/IdentifierHandler.php

IdentifierHandlerTest.php in vendor/symfony/css-selector/Tests/Parser/Handler/IdentifierHandlerTest.php

StringHandler.php in vendor/symfony/css-selector/Parser/Handler/StringHandler.php

... See full list

File

vendor/symfony/css-selector/Parser/Tokenizer/TokenizerEscaping.php, line 22

Namespace

Symfony\Component\CssSelector\Parser\Tokenizer

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);
  }

}

Members

Name	Modifiers	Type	Description	Overrides
TokenizerEscaping::$patterns	private	property
TokenizerEscaping::escapeUnicode	public	function
TokenizerEscaping::escapeUnicodeAndNewLine	public	function
TokenizerEscaping::replaceUnicodeSequences	private	function
TokenizerEscaping::__construct	public	function