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Directory >> /var/www/html/back/vendor/league/commonmark/src/Util/

File / Folder	Size	Action
.	-
ArrayCollection.php	3.395KB	edt ren
Html5EntityDecoder.php	1.772KB	edt ren
HtmlElement.php	4.043KB	edt ren
HtmlFilter.php	1.434KB	edt ren
LinkParserHelper.php	4.826KB	edt ren
PrioritizedList.php	1.603KB	edt ren
RegexHelper.php	10.127KB	edt ren
SpecReader.php	2.185KB	edt ren
UrlEncoder.php	2.558KB	edt ren
Xml.php	0.721KB	edt ren

<?php

declare(strict_types=1);

/*
 * This file is part of the league/commonmark package.
 *
 * (c) Colin O'Dell <colinodell@gmail.com>
 *
 * Original code based on the CommonMark JS reference parser (https://bitly.com/commonmark-js)
 *  - (c) John MacFarlane
 *
 * For the full copyright and license information, please view the LICENSE
 * file that was distributed with this source code.
 */

namespace League\CommonMark\Util;

use League\CommonMark\Parser\Cursor;

/**
 * @psalm-immutable
 */
final class LinkParserHelper
{
    /**
     * Attempt to parse link destination
     *
     * @return string|null The string, or null if no match
     */
    public static function parseLinkDestination(Cursor $cursor): ?string
    {
        if ($cursor->getCurrentCharacter() === '<') {
            return self::parseDestinationBraces($cursor);
        }

$destination = self::manuallyParseLinkDestination($cursor);
        if ($destination === null) {
            return null;
        }

return UrlEncoder::unescapeAndEncode(
            RegexHelper::unescape($destination)
        );
    }

public static function parseLinkLabel(Cursor $cursor): int
    {
        $match = $cursor->match('/^\[(?:[^\\\\\[\]]|\\\\.){0,1000}\]/');
        if ($match === null) {
            return 0;
        }

$length = \mb_strlen($match, 'UTF-8');

if ($length > 1001) {
            return 0;
        }

return $length;
    }

public static function parsePartialLinkLabel(Cursor $cursor): ?string
    {
        return $cursor->match('/^(?:[^\\\\\[\]]++|\\\\.?)*+/');
    }

/**
     * Attempt to parse link title (sans quotes)
     *
     * @return string|null The string, or null if no match
     */
    public static function parseLinkTitle(Cursor $cursor): ?string
    {
        if ($title = $cursor->match('/' . RegexHelper::PARTIAL_LINK_TITLE . '/')) {
            // Chop off quotes from title and unescape
            return RegexHelper::unescape(\substr($title, 1, -1));
        }

return null;
    }

public static function parsePartialLinkTitle(Cursor $cursor, string $endDelimiter): ?string
    {
        $endDelimiter = \preg_quote($endDelimiter, '/');
        $regex        = \sprintf('/(%s|[^%s\x00])*(?:%s)?/', RegexHelper::PARTIAL_ESCAPED_CHAR, $endDelimiter, $endDelimiter);
        if (($partialTitle = $cursor->match($regex)) === null) {
            return null;
        }

return RegexHelper::unescape($partialTitle);
    }

private static function manuallyParseLinkDestination(Cursor $cursor): ?string
    {
        $remainder  = $cursor->getRemainder();
        $openParens = 0;
        $len        = \strlen($remainder);
        for ($i = 0; $i < $len; $i++) {
            $c = $remainder[$i];
            if ($c === '\\' && $i + 1 < $len && RegexHelper::isEscapable($remainder[$i + 1])) {
                $i++;
            } elseif ($c === '(') {
                $openParens++;
                // Limit to 32 nested parens for pathological cases
                if ($openParens > 32) {
                    return null;
                }
            } elseif ($c === ')') {
                if ($openParens < 1) {
                    break;
                }

$openParens--;
            } elseif (\ord($c) <= 32 && RegexHelper::isWhitespace($c)) {
                break;
            }
        }

if ($openParens !== 0) {
            return null;
        }

if ($i === 0 && (! isset($c) || $c !== ')')) {
            return null;
        }

$destination = \substr($remainder, 0, $i);
        $cursor->advanceBy(\mb_strlen($destination, 'UTF-8'));

return $destination;
    }

/** @var \WeakReference<Cursor>|null */
    private static ?\WeakReference $lastCursor       = null;
    private static bool $lastCursorLacksClosingBrace = false;

private static function parseDestinationBraces(Cursor $cursor): ?string
    {
        // Optimization: If we've previously parsed this cursor and returned `null`, we know
        // that no closing brace exists, so we can skip the regex entirely. This helps avoid
        // certain pathological cases where the regex engine can take a very long time to
        // determine that no match exists.
        if (self::$lastCursor !== null && self::$lastCursor->get() === $cursor) {
            if (self::$lastCursorLacksClosingBrace) {
                return null;
            }
        } else {
            self::$lastCursor = \WeakReference::create($cursor);
        }

if ($res = $cursor->match(RegexHelper::REGEX_LINK_DESTINATION_BRACES)) {
            self::$lastCursorLacksClosingBrace = false;

// Chop off surrounding <..>:
            return UrlEncoder::unescapeAndEncode(
                RegexHelper::unescape(\substr($res, 1, -1))
            );
        }

self::$lastCursorLacksClosingBrace = true;

return null;
    }
}

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