FencedCodeStartParser.php
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<?php
declare(strict_types=1);
/*
* This file is part of the league/commonmark package.
*
* (c) Colin O'Dell <colinodell@gmail.com>
*
* For the full copyright and license information, please view the LICENSE
* file that was distributed with this source code.
*/
namespace League\CommonMark\Extension\CommonMark\Parser\Block;
use League\CommonMark\Parser\Block\BlockStart;
use League\CommonMark\Parser\Block\BlockStartParserInterface;
use League\CommonMark\Parser\Cursor;
use League\CommonMark\Parser\MarkdownParserStateInterface;
final class FencedCodeStartParser implements BlockStartParserInterface
{
public function tryStart(Cursor $cursor, MarkdownParserStateInterface $parserState): ?BlockStart
{
if ($cursor->isIndented() || ! \in_array($cursor->getNextNonSpaceCharacter(), ['`', '~'], true)) {
return BlockStart::none();
}
$indent = $cursor->getIndent();
$fence = $cursor->match('/^[ \t]*(?:`{3,}(?!.*`)|~{3,})/');
if ($fence === null) {
return BlockStart::none();
}
// fenced code block
$fence = \ltrim($fence, " \t");
return BlockStart::of(new FencedCodeParser(\strlen($fence), $fence[0], $indent))->at($cursor);
}
}