Subversion-Projekte lars-tiefland.laravel_shop

<?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\Extension\CommonMark\Parser\Inline;

use League\CommonMark\Environment\EnvironmentAwareInterface;

use League\CommonMark\Environment\EnvironmentInterface;

use League\CommonMark\Extension\CommonMark\Node\Inline\AbstractWebResource;

use League\CommonMark\Extension\CommonMark\Node\Inline\Image;

use League\CommonMark\Extension\CommonMark\Node\Inline\Link;

use League\CommonMark\Extension\Mention\Mention;

use League\CommonMark\Node\Inline\AdjacentTextMerger;

use League\CommonMark\Node\Inline\Text;

use League\CommonMark\Parser\Cursor;

use League\CommonMark\Parser\Inline\InlineParserInterface;

use League\CommonMark\Parser\Inline\InlineParserMatch;

use League\CommonMark\Parser\InlineParserContext;

use League\CommonMark\Reference\ReferenceInterface;

use League\CommonMark\Reference\ReferenceMapInterface;

use League\CommonMark\Util\LinkParserHelper;

use League\CommonMark\Util\RegexHelper;

final class CloseBracketParser implements InlineParserInterface, EnvironmentAwareInterface

{

    /** @psalm-readonly-allow-private-mutation */

    private EnvironmentInterface $environment;

    public function getMatchDefinition(): InlineParserMatch

    {

        return InlineParserMatch::string(']');

    }

    public function parse(InlineParserContext $inlineContext): bool

    {

        // Look through stack of delimiters for a [ or !

        $opener = $inlineContext->getDelimiterStack()->searchByCharacter(['[', '!']);

        if ($opener === null) {

            return false;

        }

        if (! $opener->isActive()) {

            // no matched opener; remove from emphasis stack

            $inlineContext->getDelimiterStack()->removeDelimiter($opener);

            return false;

        }

        $cursor = $inlineContext->getCursor();

        $startPos      = $cursor->getPosition();

        $previousState = $cursor->saveState();

        $cursor->advanceBy(1);

        // Check to see if we have a link/image

        // Inline link?

        if ($result = $this->tryParseInlineLinkAndTitle($cursor)) {

            $link = $result;

        } elseif ($link = $this->tryParseReference($cursor, $inlineContext->getReferenceMap(), $opener->getIndex(), $startPos)) {

            $reference = $link;

            $link      = ['url' => $link->getDestination(), 'title' => $link->getTitle()];

        } else {

            // No match

            $inlineContext->getDelimiterStack()->removeDelimiter($opener); // Remove this opener from stack

            $cursor->restoreState($previousState);

            return false;

        }

        $isImage = $opener->getChar() === '!';

        $inline = $this->createInline($link['url'], $link['title'], $isImage, $reference ?? null);

        $opener->getInlineNode()->replaceWith($inline);

        while (($label = $inline->next()) !== null) {

            // Is there a Mention or Link contained within this link?

            // CommonMark does not allow nested links, so we'll restore the original text.

            if ($label instanceof Mention) {

                $label->replaceWith($replacement = new Text($label->getPrefix() . $label->getIdentifier()));

                $inline->appendChild($replacement);

            } elseif ($label instanceof Link) {

                foreach ($label->children() as $child) {

                    $label->insertBefore($child);

                }

                $label->detach();

            } else {

                $inline->appendChild($label);

            }

        }

        // Process delimiters such as emphasis inside link/image

        $delimiterStack = $inlineContext->getDelimiterStack();

        $stackBottom    = $opener->getPrevious();

        $delimiterStack->processDelimiters($stackBottom, $this->environment->getDelimiterProcessors());

        $delimiterStack->removeAll($stackBottom);

        // Merge any adjacent Text nodes together

        AdjacentTextMerger::mergeChildNodes($inline);

        // processEmphasis will remove this and later delimiters.

        // Now, for a link, we also remove earlier link openers (no links in links)

        if (! $isImage) {

            $inlineContext->getDelimiterStack()->removeEarlierMatches('[');

        }

        return true;

    }

    public function setEnvironment(EnvironmentInterface $environment): void

    {

        $this->environment = $environment;

    }

    /**

     * @return array<string, string>|null

     */

    private function tryParseInlineLinkAndTitle(Cursor $cursor): ?array

    {

        if ($cursor->getCurrentCharacter() !== '(') {

            return null;

        }

        $previousState = $cursor->saveState();

        $cursor->advanceBy(1);

        $cursor->advanceToNextNonSpaceOrNewline();

        if (($dest = LinkParserHelper::parseLinkDestination($cursor)) === null) {

            $cursor->restoreState($previousState);

            return null;

        }

        $cursor->advanceToNextNonSpaceOrNewline();

        $previousCharacter = $cursor->peek(-1);

        // We know from previous lines that we've advanced at least one space so far, so this next call should never be null

        \assert(\is_string($previousCharacter));

        $title = '';

        // make sure there's a space before the title:

        if (\preg_match(RegexHelper::REGEX_WHITESPACE_CHAR, $previousCharacter)) {

            $title = LinkParserHelper::parseLinkTitle($cursor) ?? '';

        }

        $cursor->advanceToNextNonSpaceOrNewline();

        if ($cursor->getCurrentCharacter() !== ')') {

            $cursor->restoreState($previousState);

            return null;

        }

        $cursor->advanceBy(1);

        return ['url' => $dest, 'title' => $title];

    }

    private function tryParseReference(Cursor $cursor, ReferenceMapInterface $referenceMap, ?int $openerIndex, int $startPos): ?ReferenceInterface

    {

        if ($openerIndex === null) {

            return null;

        }

        $savePos     = $cursor->saveState();

        $beforeLabel = $cursor->getPosition();

        $n           = LinkParserHelper::parseLinkLabel($cursor);

        if ($n === 0 || $n === 2) {

            $start  = $openerIndex;

            $length = $startPos - $openerIndex;

        } else {

            $start  = $beforeLabel + 1;

            $length = $n - 2;

        }

        $referenceLabel = $cursor->getSubstring($start, $length);

        if ($n === 0) {

            // If shortcut reference link, rewind before spaces we skipped

            $cursor->restoreState($savePos);

        }

        return $referenceMap->get($referenceLabel);

    }

    private function createInline(string $url, string $title, bool $isImage, ?ReferenceInterface $reference = null): AbstractWebResource

    {

        if ($isImage) {

            $inline = new Image($url, null, $title);

        } else {

            $inline = new Link($url, null, $title);

        }

        if ($reference) {

            $inline->data->set('reference', $reference);

        }

        return $inline;

    }

}