40 lines
974 B
PHP
40 lines
974 B
PHP
<?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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}
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