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\HtmlBlock;
18use League\CommonMark\Block\Element\Paragraph;
19use League\CommonMark\ContextInterface;
20use League\CommonMark\Cursor;
21use League\CommonMark\Util\RegexHelper;
22
23final class HtmlBlockParser implements BlockParserInterface
24{
25    public function parse(ContextInterface $context, Cursor $cursor): bool
26    {
27        if ($cursor->isIndented()) {
28            return false;
29        }
30
31        if ($cursor->getNextNonSpaceCharacter() !== '<') {
32            return false;
33        }
34
35        $savedState = $cursor->saveState();
36
37        $cursor->advanceToNextNonSpaceOrTab();
38        $line = $cursor->getRemainder();
39
40        for ($blockType = 1; $blockType <= 7; $blockType++) {
41            $match = RegexHelper::matchAt(
42                RegexHelper::getHtmlBlockOpenRegex($blockType),
43                $line
44            );
45
46            if ($match !== null && ($blockType < 7 || !($context->getContainer() instanceof Paragraph))) {
47                $cursor->restoreState($savedState);
48                $context->addBlock(new HtmlBlock($blockType));
49                $context->setBlocksParsed(true);
50
51                return true;
52            }
53        }
54
55        $cursor->restoreState($savedState);
56
57        return false;
58    }
59}
60