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

TokenizerEscaping.php in LearnPress – WordPress LMS Plugin for Create and Sell Online Courses 4.3.8, at 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 TokenizerPatterns $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	}
66