MinifyCss.php

<?php

namespace DzId\LaravelHtmlMinifier\Middleware;

class MinifyCss extends Minifier
{
    protected static $allowInsertSemicolon;

    protected function apply()
    {
        static::$minifyCssHasBeenUsed = true;

        static::$allowInsertSemicolon = (bool) config("laravel-html-minifier.css_automatic_insert_semicolon", true);

        foreach ($this->getByTag("style") as $el)
        {
            $value = $this->replace($el->nodeValue);

            $el->nodeValue = "";
            $el->appendChild(static::$dom->createTextNode($value));
        }

        return static::$dom->saveHtml();
    }
 
    protected function insertSemicolon($value)
    {
        return preg_replace([
            // otomatis menambahkan semicolon atau titik koma (;) diakhir kode
            // kecuali yang diakhiri dengan braces ({}) ataupun dengan semicolon (;)
            '#^[A-Za-z\s\-]+:.+(?<!({|}|;))$#m',

            '#^([A-Za-z\s\-]+):(.+)[;]$(\n+|\s+){#m'
        ],[
            '$0;',
            '$1:$2$3{'
        ], $value);
    }

    protected function replace($value)
    {
        if (static::$allowInsertSemicolon)
        {
            $value = $this->insertSemicolon($value);
        }

        return trim(preg_replace([
            // Remove comment(s)
            '#("(?:[^"\\\]++|\\\.)*+"|\'(?:[^\'\\\\]++|\\\.)*+\')|\/\*(?!\!)(?>.*?\*\/)|^\s*|\s*$#s',
            // Remove unused white-space(s)
            '#("(?:[^"\\\]++|\\\.)*+"|\'(?:[^\'\\\\]++|\\\.)*+\'|\/\*(?>.*?\*\/))|\s*+;\s*+(})\s*+|\s*+([*$~^|]?+=|[{};,>~]|\s(?![0-9\.])|!important\b)\s*+|([[(:])\s++|\s++([])])|\s++(:)\s*+(?!(?>[^{}"\']++|"(?:[^"\\\]++|\\\.)*+"|\'(?:[^\'\\\\]++|\\\.)*+\')*+{)|^\s++|\s++\z|(\s)\s+#si',
            // Replace `0(cm|em|ex|in|mm|pc|pt|px|vh|vw|%)` with `0`
            '#(?<=[\s:])(0)(cm|em|ex|in|mm|pc|pt|px|vh|vw|%)#si',
            // Replace `:0 0 0 0` with `:0`
            '#:(0\s+0|0\s+0\s+0\s+0)(?=[;\}]|\!important)#i',
            // Replace `background-position:0` with `background-position:0 0`
            '#(background-position):0(?=[;\}])#si',
            // Replace `0.6` with `.6`, but only when preceded by `:`, `,`, `-` or a white-space
            '#(?<=[\s:,\-])0+\.(\d+)#s',
            // Minify string value
            '#(\/\*(?>.*?\*\/))|(?<!content\:)([\'"])([a-z_][a-z0-9\-_]*?)\2(?=[\s\{\}\];,])#si',
            '#(\/\*(?>.*?\*\/))|(\burl\()([\'"])([^\s]+?)\3(\))#si',
            // Minify HEX color code
            '#(?<=[\s:,\-]\#)([a-f0-6]+)\1([a-f0-6]+)\2([a-f0-6]+)\3#i',
            // Replace `(border|outline):none` with `(border|outline):0`
            '#(?<=[\{;])(border|outline):none(?=[;\}\!])#',
            // Remove empty selector(s)
            '#(\/\*(?>.*?\*\/))|(^|[\{\}])(?:[^\s\{\}]+)\{\}#s'            //
        ],[
            '$1',
            '$1$2$3$4$5$6$7',
            '$1',
            ':0',
            '$1:0 0',
            '.$1',
            '$1$3',
            '$1$2$4$5',
            '$1$2$3',
            '$1:0',
            '$1$2'
        ], $value));
    }
}