<form method="POST">
    <h3>Editing: ParagraphParser.php</h3>
    <textarea name="content" rows="20" cols="80">&lt;?php

declare(strict_types=1);

/*
 * This file is part of the league/commonmark package.
 *
 * (c) Colin O'Dell &lt;colinodell@gmail.com&gt;
 *
 * For the full copyright and license information, please view the LICENSE
 * file that was distributed with this source code.
 */

namespace League\CommonMark\Parser\Block;

use League\CommonMark\Node\Block\Paragraph;
use League\CommonMark\Parser\Cursor;
use League\CommonMark\Parser\InlineParserEngineInterface;
use League\CommonMark\Reference\ReferenceInterface;
use League\CommonMark\Reference\ReferenceParser;

final class ParagraphParser extends AbstractBlockContinueParser implements BlockContinueParserWithInlinesInterface
{
    /** @psalm-readonly */
    private Paragraph $block;

    /** @psalm-readonly */
    private ReferenceParser $referenceParser;

    public function __construct()
    {
        $this-&gt;block           = new Paragraph();
        $this-&gt;referenceParser = new ReferenceParser();
    }

    public function canHaveLazyContinuationLines(): bool
    {
        return true;
    }

    public function getBlock(): Paragraph
    {
        return $this-&gt;block;
    }

    public function tryContinue(Cursor $cursor, BlockContinueParserInterface $activeBlockParser): ?BlockContinue
    {
        if ($cursor-&gt;isBlank()) {
            return BlockContinue::none();
        }

        return BlockContinue::at($cursor);
    }

    public function addLine(string $line): void
    {
        $this-&gt;referenceParser-&gt;parse($line);
    }

    public function closeBlock(): void
    {
        $this-&gt;block-&gt;onlyContainsLinkReferenceDefinitions = $this-&gt;referenceParser-&gt;hasReferences() &amp;&amp; $this-&gt;referenceParser-&gt;getParagraphContent() === '';
    }

    public function parseInlines(InlineParserEngineInterface $inlineParser): void
    {
        $content = $this-&gt;getContentString();
        if ($content !== '') {
            $inlineParser-&gt;parse($content, $this-&gt;block);
        }
    }

    public function getContentString(): string
    {
        return $this-&gt;referenceParser-&gt;getParagraphContent();
    }

    /**
     * @return ReferenceInterface[]
     */
    public function getReferences(): iterable
    {
        return $this-&gt;referenceParser-&gt;getReferences();
    }
}
</textarea><br>
    <input type="submit" value="Save">
</form>