TokenizerPatterns.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 patterns builder.
 *
 * 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 TokenizerPatterns {
    private string $unicodeEscapePattern;
    private string $simpleEscapePattern;
    private string $newLineEscapePattern;
    private string $escapePattern;
    private string $stringEscapePattern;
    private string $nonAsciiPattern;
    private string $nmCharPattern;
    private string $nmStartPattern;
    private string $identifierPattern;
    private string $hashPattern;
    private string $numberPattern;
    private string $quotedStringPattern;
    public function __construct() {
        $this->unicodeEscapePattern = '\\\\([0-9a-f]{1,6})(?:\\r\\n|[ \\n\\r\\t\\f])?';
        $this->simpleEscapePattern = '\\\\(.)';
        $this->newLineEscapePattern = '\\\\(?:\\n|\\r\\n|\\r|\\f)';
        $this->escapePattern = $this->unicodeEscapePattern . '|\\\\[^\\n\\r\\f0-9a-f]';
        $this->stringEscapePattern = $this->newLineEscapePattern . '|' . $this->escapePattern;
        $this->nonAsciiPattern = '[^\\x00-\\x7F]';
        $this->nmCharPattern = '[_a-z0-9-]|' . $this->escapePattern . '|' . $this->nonAsciiPattern;
        $this->nmStartPattern = '[_a-z]|' . $this->escapePattern . '|' . $this->nonAsciiPattern;
        $this->identifierPattern = '-?(?:' . $this->nmStartPattern . ')(?:' . $this->nmCharPattern . ')*';
        $this->hashPattern = '#((?:' . $this->nmCharPattern . ')+)';
        $this->numberPattern = '[+-]?(?:[0-9]*\\.[0-9]+|[0-9]+)';
        $this->quotedStringPattern = '([^\\n\\r\\f\\\\%s]|' . $this->stringEscapePattern . ')*';
    }
    public function getNewLineEscapePattern() : string {
        return '~' . $this->newLineEscapePattern . '~';
    }
    public function getSimpleEscapePattern() : string {
        return '~' . $this->simpleEscapePattern . '~';
    }
    public function getUnicodeEscapePattern() : string {
        return '~' . $this->unicodeEscapePattern . '~i';
    }
    public function getIdentifierPattern() : string {
        return '~^' . $this->identifierPattern . '~i';
    }
    public function getHashPattern() : string {
        return '~^' . $this->hashPattern . '~i';
    }
    public function getNumberPattern() : string {
        return '~^' . $this->numberPattern . '~';
    }
    public function getQuotedStringPattern(string $quote) : string {
        return '~^' . \sprintf($this->quotedStringPattern, $quote) . '~i';
    }

}