1<?php
2
3/*
4 * This file is part of the league/commonmark package.
5 *
6 * (c) Colin O'Dell <colinodell@gmail.com>
7 *
8 * Original code based on the CommonMark JS reference parser (https://bitly.com/commonmark-js)
9 *  - (c) John MacFarlane
10 *
11 * For the full copyright and license information, please view the LICENSE
12 * file that was distributed with this source code.
13 */
14
15namespace League\CommonMark\Block\Parser;
16
17use League\CommonMark\Block\Element\FencedCode;
18use League\CommonMark\ContextInterface;
19use League\CommonMark\Cursor;
20
21final class FencedCodeParser implements BlockParserInterface
22{
23    public function parse(ContextInterface $context, Cursor $cursor): bool
24    {
25        if ($cursor->isIndented()) {
26            return false;
27        }
28
29        $c = $cursor->getCharacter();
30        if ($c !== ' ' && $c !== "\t" && $c !== '`' && $c !== '~') {
31            return false;
32        }
33
34        $indent = $cursor->getIndent();
35        $fence = $cursor->match('/^[ \t]*(?:`{3,}(?!.*`)|~{3,})/');
36        if ($fence === null) {
37            return false;
38        }
39
40        // fenced code block
41        $fence = \ltrim($fence, " \t");
42        $fenceLength = \strlen($fence);
43        $context->addBlock(new FencedCode($fenceLength, $fence[0], $indent));
44
45        return true;
46    }
47}
48