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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\Inline\Parser;
use League\CommonMark\Inline\Element\Code;
use League\CommonMark\Inline\Element\Text;
use League\CommonMark\InlineParserContext;
final class BacktickParser implements InlineParserInterface
{
public function getCharacters(): array
{
return ['`'];
}
public function parse(InlineParserContext $inlineContext): bool
{
$cursor = $inlineContext->getCursor();
$ticks = $cursor->match('/^`+/');
$currentPosition = $cursor->getPosition();
$previousState = $cursor->saveState();
while ($matchingTicks = $cursor->match('/`+/m')) {
if ($matchingTicks === $ticks) {
$code = $cursor->getSubstring($currentPosition, $cursor->getPosition() - $currentPosition - \strlen($ticks));
$c = \preg_replace('/\n/m', ' ', $code);
if (
!empty($c) &&
$c[0] === ' ' &&
\substr($c, -1, 1) === ' ' &&
\preg_match('/[^ ]/', $c)
) {
$c = \substr($c, 1, -1);
}
$inlineContext->getContainer()->appendChild(new Code($c));
return true;
}
}
// If we got here, we didn't match a closing backtick sequence
$cursor->restoreState($previousState);
$inlineContext->getContainer()->appendChild(new Text($ticks));
return true;
}
}