57 lines
2.4 KiB
PHP
57 lines
2.4 KiB
PHP
<?php
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declare(strict_types=1);
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/*
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* This file is part of the TYPO3 CMS project.
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*
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* It is free software; you can redistribute it and/or modify it under
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* the terms of the GNU General Public License, either version 2
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* of the License, or any later version.
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*
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* For the full copyright and license information, please read the
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* LICENSE.txt file that was distributed with this source code.
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*
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* The TYPO3 project - inspiring people to share!
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*/
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namespace TYPO3\CMS\Core\Text;
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readonly class TextCropper
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{
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/**
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* Implements "cropHTML" which is a modified "substr" function allowing to limit a string length to a certain number
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* of chars (from either start or end of string) and having a pre/postfix applied if the string really was cropped.
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*
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* Note: Crop is done without properly respecting html tags and entities.
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*
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* @param string $content The string to perform the operation on
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* @param int $numberOfChars Max number of chars of the string. Negative value means cropping from end of string.
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* @param string $replacementForEllipsis The pre/postfix string to apply if cropping occurs.
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* @param bool $cropToSpace If true then crop will be applied at nearest space.
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* @return string The processed input value.
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*/
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public function crop(string $content, int $numberOfChars, string $replacementForEllipsis, bool $cropToSpace): string
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{
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if (!$numberOfChars || !(mb_strlen($content, 'utf-8') > abs($numberOfChars))) {
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return $content;
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}
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if ($numberOfChars < 0) {
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// cropping from the right side of the content, prepanding replacementForEllipsis
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$content = mb_substr($content, $numberOfChars, null, 'utf-8');
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$truncatePosition = $cropToSpace ? mb_strpos($content, ' ', 0, 'utf-8') : false;
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return $truncatePosition > 0
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? $replacementForEllipsis . mb_substr($content, $truncatePosition, null, 'utf-8')
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: $replacementForEllipsis . $content;
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}
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// cropping from the left side of content, appending replacementForEllipsis
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$content = mb_substr($content, 0, $numberOfChars, 'utf-8');
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$truncatePosition = $cropToSpace ? mb_strrpos($content, ' ', 0, 'utf-8') : false;
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return $truncatePosition > 0
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? mb_substr($content, 0, $truncatePosition, 'utf-8') . $replacementForEllipsis
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: $content . $replacementForEllipsis;
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}
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}
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