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<?php
/*
* This file is part of the league/commonmark package.
*
* (c) Colin O'Dell <colinodell@gmail.com>
* (c) Rezo Zero / Ambroise Maupate
*
* For the full copyright and license information, please view the LICENSE
* file that was distributed with this source code.
*/
declare(strict_types=1);
namespace League\CommonMark\Extension\Footnote\Parser;
use League\CommonMark\Extension\Footnote\Node\FootnoteRef;
use League\CommonMark\Inline\Parser\InlineParserInterface;
use League\CommonMark\InlineParserContext;
use League\CommonMark\Normalizer\SlugNormalizer;
use League\CommonMark\Normalizer\TextNormalizerInterface;
use League\CommonMark\Reference\Reference;
final class AnonymousFootnoteRefParser implements InlineParserInterface
{
/** @var TextNormalizerInterface */
private $slugNormalizer;
public function __construct()
{
$this->slugNormalizer = new SlugNormalizer();
}
public function getCharacters(): array
{
return ['^'];
}
public function parse(InlineParserContext $inlineContext): bool
{
$container = $inlineContext->getContainer();
$cursor = $inlineContext->getCursor();
$nextChar = $cursor->peek();
if ($nextChar !== '[') {
return false;
}
$state = $cursor->saveState();
$m = $cursor->match('/\^\[[^\n^\]]+\]/');
if ($m !== null) {
if (\preg_match('#\^\[([^\]]+)\]#', $m, $matches) > 0) {
$reference = $this->createReference($matches[1]);
$container->appendChild(new FootnoteRef($reference, $matches[1]));
return true;
}
}
$cursor->restoreState($state);
return false;
}
private function createReference(string $label): Reference
{
$refLabel = $this->slugNormalizer->normalize($label);
$refLabel = \mb_substr($refLabel, 0, 20);
return new Reference($refLabel, '#fn:' . $refLabel, $label);
}
}
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