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✏️ Editing: DocumentBlockParser.php

<?php

declare(strict_types=1);

/*
 * This file is part of the league/commonmark package.
 *
 * (c) Colin O'Dell <colinodell@gmail.com>
 *
 * 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\AbstractBlock;
use League\CommonMark\Node\Block\Document;
use League\CommonMark\Node\Block\Paragraph;
use League\CommonMark\Parser\Cursor;
use League\CommonMark\Reference\ReferenceMapInterface;

/**
 * Parser implementation which ensures everything is added to the root-level Document
 */
final class DocumentBlockParser extends AbstractBlockContinueParser
{
    /** @psalm-readonly */
    private Document $document;

public function __construct(ReferenceMapInterface $referenceMap)
    {
        $this->document = new Document($referenceMap);
    }

public function getBlock(): Document
    {
        return $this->document;
    }

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

public function canContain(AbstractBlock $childBlock): bool
    {
        return true;
    }

public function tryContinue(Cursor $cursor, BlockContinueParserInterface $activeBlockParser): ?BlockContinue
    {
        return BlockContinue::at($cursor);
    }

public function closeBlock(): void
    {
        $this->removeLinkReferenceDefinitions();
    }

private function removeLinkReferenceDefinitions(): void
    {
        $emptyNodes = [];

$walker = $this->document->walker();
        while ($event = $walker->next()) {
            $node = $event->getNode();
            // TODO for v3: It would be great if we could find an alternate way to identify such paragraphs.
            // Unfortunately, we can't simply check for empty paragraphs here because inlines haven't been processed yet,
            // meaning all paragraphs will appear blank here, and we don't have a way to check the status of the reference parser
            // which is attached to the (already-closed) paragraph parser.
            if ($event->isEntering() && $node instanceof Paragraph && $node->onlyContainsLinkReferenceDefinitions) {
                $emptyNodes[] = $node;
            }
        }

foreach ($emptyNodes as $node) {
            $node->detach();
        }
    }
}

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