ScssProcessor.php

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<?php
 
declare(strict_types=1);
 
/*
 * This file is part of the TYPO3 CMS project.
 *
 * It is free software; you can redistribute it and/or modify it under
 * the terms of the GNU General Public License, either version 2
 * of the License, or any later version.
 *
 * For the full copyright and license information, please read the
 * LICENSE.txt file that was distributed with this source code.
 *
 * The TYPO3 project - inspiring people to share!
 */
 
namespace ‪TYPO3\CMS\RteCKEditor\Service;
 
use ScssPhp\ScssPhp\Compiler;
 
class ‪ScssProcessor
{
    public function ‪__construct(
        protected readonly Compiler $scssCompiler
    ) {
    }
 
    public function ‪compileToCss(string $scssSource): string
    {
        return $this->scssCompiler->compileString($scssSource)->getCss();
    }
 
    public function ‪prefixCssForScss(string $cssPrefix, string $cssSource): string
    {
        // replace body and html with the prefix
        foreach (['html', 'body'] as $cssSelector) {
            $cssSource = preg_replace('/(?<![-.#\w])\b' . preg_quote($cssSelector, '/') . '\b(?!-)/i', '&', $cssSource);
        }
 
        // Some CSS minifier remove the semicolon before the curly brace
        // While this is valid CSS, the ScssPHP Parser is unable to identify
        // the end of a declaration block. We are adding them, to avoid
        // parsing errors. Superfluous semicolons will be dropped by the parser.
        $cssSource = str_replace('}', ';}', $cssSource);
 
        // add prefix to all CSS definitions by wrapping it in SCSS group
        $cssSource = sprintf("%s {\n%s\n}", $cssPrefix, $cssSource);
 
        // Moving CSS variables assigned to :root to the new parent.
        $cssSource = str_replace(':root', '&', $cssSource);
 
        return $cssSource;
    }
}