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>

 *

 * For the full copyright and license information, please view the LICENSE

 * file that was distributed with this source code.

 */

namespace League\CommonMark\Extension\HeadingPermalink;

use League\CommonMark\Environment\EnvironmentAwareInterface;

use League\CommonMark\Environment\EnvironmentInterface;

use League\CommonMark\Event\DocumentParsedEvent;

use League\CommonMark\Extension\CommonMark\Node\Block\Heading;

use League\CommonMark\Node\NodeIterator;

use League\CommonMark\Node\RawMarkupContainerInterface;

use League\CommonMark\Node\StringContainerHelper;

use League\CommonMark\Normalizer\TextNormalizerInterface;

use League\Config\ConfigurationInterface;

/**

 * Searches the Document for Heading elements and adds HeadingPermalinks to each one

 */

final class HeadingPermalinkProcessor implements EnvironmentAwareInterface

{

    public const INSERT_BEFORE = 'before';

    public const INSERT_AFTER  = 'after';

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

    private TextNormalizerInterface $slugNormalizer;

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

    private ConfigurationInterface $config;

    public function setEnvironment(EnvironmentInterface $environment): void

    {

        $this->config         = $environment->getConfiguration();

        $this->slugNormalizer = $environment->getSlugNormalizer();

    }

    public function __invoke(DocumentParsedEvent $e): void

    {

        $min = (int) $this->config->get('heading_permalink/min_heading_level');

        $max = (int) $this->config->get('heading_permalink/max_heading_level');

        $slugLength = (int) $this->config->get('slug_normalizer/max_length');

        foreach ($e->getDocument()->iterator(NodeIterator::FLAG_BLOCKS_ONLY) as $node) {

            if ($node instanceof Heading && $node->getLevel() >= $min && $node->getLevel() <= $max) {

                $this->addHeadingLink($node, $slugLength);

            }

        }

    }

    private function addHeadingLink(Heading $heading, int $slugLength): void

    {

        $text = StringContainerHelper::getChildText($heading, [RawMarkupContainerInterface::class]);

        $slug = $this->slugNormalizer->normalize($text, [

            'node' => $heading,

            'length' => $slugLength,

        ]);

        $headingLinkAnchor = new HeadingPermalink($slug);

        switch ($this->config->get('heading_permalink/insert')) {

            case self::INSERT_BEFORE:

                $heading->prependChild($headingLinkAnchor);

                return;

            case self::INSERT_AFTER:

                $heading->appendChild($headingLinkAnchor);

                return;

            default:

                throw new \RuntimeException("Invalid configuration value for heading_permalink/insert; expected 'before' or 'after'");

        }

    }

}