ds-site/Classes/UserFunction/CodeHighlighting.php

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<?php
declare(strict_types=1);
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/*
* Copyright (C) 2019 Daniel Siepmann <coding@daniel-siepmann.de>
*
* This program is free software; you can redistribute it and/or
* modify it under the terms of the GNU General Public License
* as published by the Free Software Foundation; either version 2
* of the License, or (at your option) any later version.
*
* This program is distributed in the hope that it will be useful,
* but WITHOUT ANY WARRANTY; without even the implied warranty of
* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
* GNU General Public License for more details.
*
* You should have received a copy of the GNU General Public License
* along with this program; if not, write to the Free Software
* Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA
* 02110-1301, USA.
*/
namespace DanielSiepmann\DsSite\UserFunction;
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use DomainException;
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use Highlight\Highlighter;
use TYPO3\CMS\Frontend\ContentObject\ContentObjectRenderer;
/**
* Highlights the current value via library.
* Returns HTML Markup with css classes for proper highlighting.
*/
class CodeHighlighting
{
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private ContentObjectRenderer $contentObjectRenderer;
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public function setContentObjectRenderer(ContentObjectRenderer $contentObjectRenderer): void
{
$this->contentObjectRenderer = $contentObjectRenderer;
}
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public function preTag(string $content, array $config): string
{
$highlighter = new Highlighter();
$highlighter->setClassPrefix('');
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$code = $this->contentObjectRenderer->data[$this->contentObjectRenderer->currentValKey];
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$code = htmlspecialchars_decode(trim($code));
try {
// Highlight some code.
$highlighted = $highlighter->highlightAuto($code);
$content = '<pre><code>' . $highlighted->value . '</code></pre>';
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} catch (DomainException $e) {
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$content = '<pre><code>' . $code . '</code></pre>';
}
return $content;
}
}