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<?php
/*
* This file is part of the league/commonmark package.
*
* (c) Colin O'Dell <colinodell@gmail.com>
*
* Original code based on the CommonMark JS reference parser (https://bitly.com/commonmark-js)
* - (c) John MacFarlane
*
* For the full copyright and license information, please view the LICENSE
* file that was distributed with this source code.
*/
namespace League\CommonMark\Block\Parser;
use League\CommonMark\Block\Element\Heading;
use League\CommonMark\ContextInterface;
use League\CommonMark\Cursor;
use League\CommonMark\Util\RegexHelper;
class ATXHeadingParser implements BlockParserInterface
{
/**
* @param ContextInterface $context
* @param Cursor $cursor
*
* @return bool
*/
public function parse(ContextInterface $context, Cursor $cursor): bool
{
if ($cursor->isIndented()) {
return false;
}
$match = RegexHelper::matchAll('/^#{1,6}(?:[ \t]+|$)/', $cursor->getLine(), $cursor->getNextNonSpacePosition());
if (!$match) {
return false;
}
$cursor->advanceToNextNonSpaceOrTab();
$cursor->advanceBy(\strlen($match[0]));
$level = \strlen(\trim($match[0]));
$str = $cursor->getRemainder();
$str = \preg_replace('/^[ \t]*#+[ \t]*$/', '', $str);
$str = \preg_replace('/[ \t]+#+[ \t]*$/', '', $str);
$context->addBlock(new Heading($level, $str));
$context->setBlocksParsed(true);
return true;
}
}
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