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Revision Autor Zeilennr. Zeile
148 lars 1 
<?php
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/*
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 * This file is part of the league/commonmark package.
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 *
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 * (c) Colin O'Dell <colinodell@gmail.com>
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 *
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 * For the full copyright and license information, please view the LICENSE
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 * file that was distributed with this source code.
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 */
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declare(strict_types=1);
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namespace League\CommonMark\Normalizer;
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/***
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 * Normalize text input using the steps given by the CommonMark spec to normalize labels
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 *
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 * @see https://spec.commonmark.org/0.29/#matches
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 *
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 * @psalm-immutable
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 */
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final class TextNormalizer implements TextNormalizerInterface
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{
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    /**
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     * {@inheritDoc}
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     *
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     * @psalm-pure
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     */
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    public function normalize(string $text, array $context = []): string
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    {
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        // Collapse internal whitespace to single space and remove
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        // leading/trailing whitespace
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        $text = \preg_replace('/[ \t\r\n]+/', ' ', \trim($text));
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        \assert(\is_string($text));
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        return \mb_convert_case($text, \MB_CASE_FOLD, 'UTF-8');
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    }
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}