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<?php
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declare(strict_types=1);
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/*
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* This file is part of the league/commonmark package.
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*
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* (c) Colin O'Dell <colinodell@gmail.com>
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*
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* Original code based on the CommonMark JS reference parser (https://bitly.com/commonmark-js)
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* - (c) John MacFarlane
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*
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* For the full copyright and license information, please view the LICENSE
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* file that was distributed with this source code.
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*/
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namespace League\CommonMark\Extension\CommonMark\Parser\Inline;
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use League\CommonMark\Extension\CommonMark\Node\Inline\Code;
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use League\CommonMark\Node\Inline\Text;
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use League\CommonMark\Parser\Inline\InlineParserInterface;
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use League\CommonMark\Parser\Inline\InlineParserMatch;
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use League\CommonMark\Parser\InlineParserContext;
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final class BacktickParser implements InlineParserInterface
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{
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public function getMatchDefinition(): InlineParserMatch
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{
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return InlineParserMatch::regex('`+');
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}
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public function parse(InlineParserContext $inlineContext): bool
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{
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$ticks = $inlineContext->getFullMatch();
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$cursor = $inlineContext->getCursor();
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$cursor->advanceBy($inlineContext->getFullMatchLength());
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$currentPosition = $cursor->getPosition();
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$previousState = $cursor->saveState();
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while ($matchingTicks = $cursor->match('/`+/m')) {
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if ($matchingTicks !== $ticks) {
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continue;
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}
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$code = $cursor->getSubstring($currentPosition, $cursor->getPosition() - $currentPosition - \strlen($ticks));
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$c = \preg_replace('/\n/m', ' ', $code) ?? '';
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if (
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$c !== '' &&
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$c[0] === ' ' &&
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\substr($c, -1, 1) === ' ' &&
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\preg_match('/[^ ]/', $c)
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) {
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$c = \substr($c, 1, -1);
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}
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$inlineContext->getContainer()->appendChild(new Code($c));
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return true;
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}
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// If we got here, we didn't match a closing backtick sequence
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$cursor->restoreState($previousState);
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$inlineContext->getContainer()->appendChild(new Text($ticks));
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return true;
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}
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}
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