CORE_V5 // DisallowedRawHtml

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Editing: DisallowedRawHtmlExtension.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\DisallowedRawHtml;

use League\CommonMark\Environment\EnvironmentBuilderInterface;
use League\CommonMark\Extension\CommonMark\Node\Block\HtmlBlock;
use League\CommonMark\Extension\CommonMark\Node\Inline\HtmlInline;
use League\CommonMark\Extension\CommonMark\Renderer\Block\HtmlBlockRenderer;
use League\CommonMark\Extension\CommonMark\Renderer\Inline\HtmlInlineRenderer;
use League\CommonMark\Extension\ConfigurableExtensionInterface;
use League\Config\ConfigurationBuilderInterface;
use Nette\Schema\Expect;

final class DisallowedRawHtmlExtension implements ConfigurableExtensionInterface
{
    private const DEFAULT_DISALLOWED_TAGS = [
        'title',
        'textarea',
        'style',
        'xmp',
        'iframe',
        'noembed',
        'noframes',
        'script',
        'plaintext',
    ];

public function configureSchema(ConfigurationBuilderInterface $builder): void
    {
        $builder->addSchema('disallowed_raw_html', Expect::structure([
            'disallowed_tags' => Expect::listOf('string')->default(self::DEFAULT_DISALLOWED_TAGS)->mergeDefaults(false),
        ]));
    }

public function register(EnvironmentBuilderInterface $environment): void
    {
        $environment->addRenderer(HtmlBlock::class, new DisallowedRawHtmlRenderer(new HtmlBlockRenderer()), 50);
        $environment->addRenderer(HtmlInline::class, new DisallowedRawHtmlRenderer(new HtmlInlineRenderer()), 50);
    }
}

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