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File Content: `HeadingStartParser.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\Extension\CommonMark\Parser\Block;

use League\CommonMark\Parser\Block\BlockStart;
use League\CommonMark\Parser\Block\BlockStartParserInterface;
use League\CommonMark\Parser\Cursor;
use League\CommonMark\Parser\MarkdownParserStateInterface;
use League\CommonMark\Util\RegexHelper;

class HeadingStartParser implements BlockStartParserInterface
{
    public function tryStart(Cursor $cursor, MarkdownParserStateInterface $parserState): ?BlockStart
    {
        if ($cursor->isIndented() || ! \in_array($cursor->getNextNonSpaceCharacter(), ['#', '-', '='], true)) {
            return BlockStart::none();
        }

        $cursor->advanceToNextNonSpaceOrTab();

        if ($atxHeading = self::getAtxHeader($cursor)) {
            return BlockStart::of($atxHeading)->at($cursor);
        }

        $setextHeadingLevel = self::getSetextHeadingLevel($cursor);
        if ($setextHeadingLevel > 0) {
            $content = $parserState->getParagraphContent();
            if ($content !== null) {
                $cursor->advanceToEnd();

                return BlockStart::of(new HeadingParser($setextHeadingLevel, $content))
                    ->at($cursor)
                    ->replaceActiveBlockParser();
            }
        }

        return BlockStart::none();
    }

    private static function getAtxHeader(Cursor $cursor): ?HeadingParser
    {
        $match = RegexHelper::matchFirst('/^#{1,6}(?:[ \t]+|$)/', $cursor->getRemainder());
        if (! $match) {
            return null;
        }

        $cursor->advanceToNextNonSpaceOrTab();
        $cursor->advanceBy(\strlen($match[0]));

        $level = \strlen(\trim($match[0]));
        $str   = $cursor->getRemainder();
        $str   = \preg_replace('/^[ \t]*#+[ \t]*$/', '', $str);
        \assert(\is_string($str));
        $str = \preg_replace('/[ \t]+#+[ \t]*$/', '', $str);
        \assert(\is_string($str));

        return new HeadingParser($level, $str);
    }

    private static function getSetextHeadingLevel(Cursor $cursor): int
    {
        $match = RegexHelper::matchFirst('/^(?:=+|-+)[ \t]*$/', $cursor->getRemainder());
        if ($match === null) {
            return 0;
        }

        return $match[0][0] === '=' ? 1 : 2;
    }
}

Name	Size	Permission
BlockQuoteParser.php	1578 bytes	0755
BlockQuoteStartParser.php	1113 bytes	0755
FencedCodeParser.php	2788 bytes	0755
FencedCodeStartParser.php	1250 bytes	0755
HeadingParser.php	1508 bytes	0755
HeadingStartParser.php	2525 bytes	0755
HtmlBlockParser.php	2298 bytes	0755
HtmlBlockStartParser.php	2134 bytes	0755
IndentedCodeParser.php	2149 bytes	0755
IndentedCodeStartParser.php	1211 bytes	0755
ListBlockParser.php	2944 bytes	0755
ListBlockStartParser.php	5584 bytes	0755
ListItemParser.php	2420 bytes	0755
ThematicBreakParser.php	1174 bytes	0755
ThematicBreakStartParser.php	1271 bytes	0755

Command Bosku:

File Content: HeadingStartParser.php

File Content: `HeadingStartParser.php`