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File Name : css.cls.php

<?php
// phpcs:ignoreFile
/**
 * css.cls.php - modified PHP implementation of Matthias Mullie's CSS minifier
 *
 * @author Matthias Mullie <minify@mullie.eu>
 * @copyright Copyright (c) 2012, Matthias Mullie. All rights reserved
 * @license MIT License
 */

namespace LiteSpeed\Lib\CSS_JS_MIN\Minify;

use LiteSpeed\Lib\CSS_JS_MIN\Minify\Minify;
use LiteSpeed\Lib\CSS_JS_MIN\Minify\Exception\FileImportException;
use LiteSpeed\Lib\CSS_JS_MIN\PathConverter\Converter;
use LiteSpeed\Lib\CSS_JS_MIN\PathConverter\ConverterInterface;

defined( 'WPINC' ) || exit;

class CSS extends Minify {

/**
	 * @var int maximum import size in kB
	 */
	protected $maxImportSize = 5;

/**
	 * @var string[] valid import extensions
	 */
	protected $importExtensions = array(
		'gif'   => 'data:image/gif',
		'png'   => 'data:image/png',
		'jpe'   => 'data:image/jpeg',
		'jpg'   => 'data:image/jpeg',
		'jpeg'  => 'data:image/jpeg',
		'svg'   => 'data:image/svg+xml',
		'woff'  => 'data:application/x-font-woff',
		'woff2' => 'data:application/x-font-woff2',
		'avif'  => 'data:image/avif',
		'apng'  => 'data:image/apng',
		'webp'  => 'data:image/webp',
		'tif'   => 'image/tiff',
		'tiff'  => 'image/tiff',
		'xbm'   => 'image/x-xbitmap',
	);

/**
	 * Set the maximum size if files to be imported.
	 *
	 * Files larger than this size (in kB) will not be imported into the CSS.
	 * Importing files into the CSS as data-uri will save you some connections,
	 * but we should only import relatively small decorative images so that our
	 * CSS file doesn't get too bulky.
	 *
	 * @param int $size Size in kB
	 */
	public function setMaxImportSize( $size ) {
		$this->maxImportSize = $size;
	}

/**
	 * Set the type of extensions to be imported into the CSS (to save network
	 * connections).
	 * Keys of the array should be the file extensions & respective values
	 * should be the data type.
	 *
	 * @param string[] $extensions Array of file extensions
	 */
	public function setImportExtensions( array $extensions ) {
		$this->importExtensions = $extensions;
	}

/**
	 * Move any import statements to the top.
	 *
	 * @param string $content Nearly finished CSS content
	 *
	 * @return string
	 */
	public function moveImportsToTop( $content ) {
		if ( preg_match_all( '/(;?)(@import (?<url>url$)?(?P<quotes>["\']?).+?(?P=quotes)(?(url)$));?/', $content, $matches ) ) {
			// remove from content
			foreach ( $matches[0] as $import ) {
				$content = str_replace( $import, '', $content );
			}

// add to top
			$content = implode( ';', $matches[2] ) . ';' . trim( $content, ';' );
		}

return $content;
	}

/**
	 * Combine CSS from import statements.
	 *
	 * \@import's will be loaded and their content merged into the original file,
	 * to save HTTP requests.
	 *
	 * @param string   $source  The file to combine imports for
	 * @param string   $content The CSS content to combine imports for
	 * @param string[] $parents Parent paths, for circular reference checks
	 *
	 * @return string
	 *
	 * @throws FileImportException
	 */
	protected function combineImports( $source, $content, $parents ) {
		$importRegexes = array(
			// @import url(xxx)
			'/
            # import statement
            @import

# whitespace
            \s+

# open url()
                url\(

# (optional) open path enclosure
                    (?P<quotes>["\']?)

# fetch path
                        (?P<path>.+?)

# (optional) close path enclosure
                    (?P=quotes)

# close url()
                \)

# (optional) trailing whitespace
                \s*

# (optional) media statement(s)
                (?P<media>[^;]*)

# (optional) trailing whitespace
                \s*

# (optional) closing semi-colon
            ;?

/ix',

// @import 'xxx'
			'/

# import statement
            @import

# whitespace
            \s+

# open path enclosure
                (?P<quotes>["\'])

# fetch path
                    (?P<path>.+?)

# close path enclosure
                (?P=quotes)

# (optional) trailing whitespace
                \s*

# (optional) media statement(s)
                (?P<media>[^;]*)

# (optional) trailing whitespace
                \s*

# (optional) closing semi-colon
            ;?

/ix',
		);

// find all relative imports in css
		$matches = array();
		foreach ( $importRegexes as $importRegex ) {
			if ( preg_match_all( $importRegex, $content, $regexMatches, PREG_SET_ORDER ) ) {
				$matches = array_merge( $matches, $regexMatches );
			}
		}

$search  = array();
		$replace = array();

// loop the matches
		foreach ( $matches as $match ) {
			// get the path for the file that will be imported
			$importPath = dirname( $source ) . '/' . $match['path'];

// only replace the import with the content if we can grab the
			// content of the file
			if ( ! $this->canImportByPath( $match['path'] ) || ! $this->canImportFile( $importPath ) ) {
				continue;
			}

// check if current file was not imported previously in the same
			// import chain.
			if ( in_array( $importPath, $parents ) ) {
				throw new FileImportException( 'Failed to import file "' . $importPath . '": circular reference detected.' );
			}

// grab referenced file & minify it (which may include importing
			// yet other @import statements recursively)
			$minifier = new self( $importPath );
			$minifier->setMaxImportSize( $this->maxImportSize );
			$minifier->setImportExtensions( $this->importExtensions );
			$importContent = $minifier->execute( $source, $parents );

// check if this is only valid for certain media
			if ( ! empty( $match['media'] ) ) {
				$importContent = '@media ' . $match['media'] . '{' . $importContent . '}';
			}

// add to replacement array
			$search[]  = $match[0];
			$replace[] = $importContent;
		}

// replace the import statements
		return str_replace( $search, $replace, $content );
	}

/**
	 * Import files into the CSS, base64 encoded.
	 *
	 * Included images @url(image.jpg) will be loaded and their content merged into the
	 * original file, to save HTTP requests.
	 *
	 * @param string $source  The file to import files for
	 * @param string $content The CSS content to import files for
	 *
	 * @return string
	 */
	protected function importFiles( $source, $content ) {
		$regex = '/url$(["\']?)(.+?)\\1$/i';
		if ( $this->importExtensions && preg_match_all( $regex, $content, $matches, PREG_SET_ORDER ) ) {
			$search  = array();
			$replace = array();

// loop the matches
			foreach ( $matches as $match ) {
				$extension = substr( strrchr( $match[2], '.' ), 1 );
				if ( $extension && ! array_key_exists( $extension, $this->importExtensions ) ) {
					continue;
				}

// get the path for the file that will be imported
				$path = $match[2];
				$path = dirname( $source ) . '/' . $path;

// only replace the import with the content if we're able to get
				// the content of the file, and it's relatively small
				if ( $this->canImportFile( $path ) && $this->canImportBySize( $path ) ) {
					// grab content && base64-ize
					$importContent = $this->load( $path );
					$importContent = base64_encode( $importContent );

// build replacement
					$search[]  = $match[0];
					$replace[] = 'url(' . $this->importExtensions[ $extension ] . ';base64,' . $importContent . ')';
				}
			}

// replace the import statements
			$content = str_replace( $search, $replace, $content );
		}

return $content;
	}

/**
	 * Minify the data.
	 * Perform CSS optimizations.
	 *
	 * @param string[optional] $path    Path to write the data to
	 * @param string[]         $parents Parent paths, for circular reference checks
	 *
	 * @return string The minified data
	 */
	public function execute( $path = null, $parents = array() ) {
		$content = '';

// loop CSS data (raw data and files)
		foreach ( $this->data as $source => $css ) {
			/*
			 * Let's first take out strings & comments, since we can't just
			 * remove whitespace anywhere. If whitespace occurs inside a string,
			 * we should leave it alone. E.g.:
			 * p { content: "a   test" }
			 */
			$this->extractStrings();
			$this->stripComments();
			$this->extractMath();
			$this->extractCustomProperties();
			$css = $this->replace( $css );

$css = $this->stripWhitespace( $css );
			$css = $this->convertLegacyColors( $css );
			$css = $this->cleanupModernColors( $css );
			$css = $this->shortenHEXColors( $css );
			$css = $this->shortenZeroes( $css );
			$css = $this->shortenFontWeights( $css );
			$css = $this->stripEmptyTags( $css );

// restore the string we've extracted earlier
			$css = $this->restoreExtractedData( $css );

$source  = is_int( $source ) ? '' : $source;
			$parents = $source ? array_merge( $parents, array( $source ) ) : $parents;
			$css     = $this->combineImports( $source, $css, $parents );
			$css     = $this->importFiles( $source, $css );

/*
			 * If we'll save to a new path, we'll have to fix the relative paths
			 * to be relative no longer to the source file, but to the new path.
			 * If we don't write to a file, fall back to same path so no
			 * conversion happens (because we still want it to go through most
			 * of the move code, which also addresses url() & @import syntax...)
			 */
			$converter = $this->getPathConverter( $source, $path ?: $source );
			$css       = $this->move( $converter, $css );

// combine css
			$content .= $css;
		}

$content = $this->moveImportsToTop( $content );

return $content;
	}

/**
	 * Moving a css file should update all relative urls.
	 * Relative references (e.g. ../images/image.gif) in a certain css file,
	 * will have to be updated when a file is being saved at another location
	 * (e.g. ../../images/image.gif, if the new CSS file is 1 folder deeper).
	 *
	 * @param ConverterInterface $converter Relative path converter
	 * @param string             $content   The CSS content to update relative urls for
	 *
	 * @return string
	 */
	protected function move( ConverterInterface $converter, $content ) {
		/*
		 * Relative path references will usually be enclosed by url(). @import
		 * is an exception, where url() is not necessary around the path (but is
		 * allowed).
		 * This *could* be 1 regular expression, where both regular expressions
		 * in this array are on different sides of a |. But we're using named
		 * patterns in both regexes, the same name on both regexes. This is only
		 * possible with a (?J) modifier, but that only works after a fairly
		 * recent PCRE version. That's why I'm doing 2 separate regular
		 * expressions & combining the matches after executing of both.
		 */
		$relativeRegexes = array(
			// url(xxx)
			'/
            # open url()
            url\(

\s*

# open path enclosure
                (?P<quotes>["\'])?

# fetch path
                    (?P<path>.+?)

# close path enclosure
                (?(quotes)(?P=quotes))

\s*

# close url()
            \)

/ix',

// @import "xxx"
			'/
            # import statement
            @import

# whitespace
            \s+

# we don\'t have to check for @import url(), because the
                # condition above will already catch these

# open path enclosure
                (?P<quotes>["\'])

# fetch path
                    (?P<path>.+?)

# close path enclosure
                (?P=quotes)

/ix',
		);

// find all relative urls in css
		$matches = array();
		foreach ( $relativeRegexes as $relativeRegex ) {
			if ( preg_match_all( $relativeRegex, $content, $regexMatches, PREG_SET_ORDER ) ) {
				$matches = array_merge( $matches, $regexMatches );
			}
		}

$search  = array();
		$replace = array();

// loop all urls
		foreach ( $matches as $match ) {
			// determine if it's a url() or an @import match
			$type = ( strpos( $match[0], '@import' ) === 0 ? 'import' : 'url' );

$url = $match['path'];
			if ( $this->canImportByPath( $url ) ) {
				// attempting to interpret GET-params makes no sense, so let's discard them for awhile
				$params = strrchr( $url, '?' );
				$url    = $params ? substr( $url, 0, -strlen( $params ) ) : $url;

// fix relative url
				$url = $converter->convert( $url );

// now that the path has been converted, re-apply GET-params
				$url .= $params;
			}

/*
			 * Urls with control characters above 0x7e should be quoted.
			 * According to Mozilla's parser, whitespace is only allowed at the
			 * end of unquoted urls.
			 * Urls with `)` (as could happen with data: uris) should also be
			 * quoted to avoid being confused for the url() closing parentheses.
			 * And urls with a # have also been reported to cause issues.
			 * Urls with quotes inside should also remain escaped.
			 *
			 * @see https://developer.mozilla.org/nl/docs/Web/CSS/url#The_url()_functional_notation
			 * @see https://hg.mozilla.org/mozilla-central/rev/14abca4e7378
			 * @see https://github.com/matthiasmullie/minify/issues/193
			 */
			$url = trim( $url );
			if ( preg_match( '/[\s\)\'"#\x{7f}-\x{9f}]/u', $url ) ) {
				$url = $match['quotes'] . $url . $match['quotes'];
			}

// build replacement
			$search[] = $match[0];
			if ( $type === 'url' ) {
				$replace[] = 'url(' . $url . ')';
			} elseif ( $type === 'import' ) {
				$replace[] = '@import "' . $url . '"';
			}
		}

// replace urls
		return str_replace( $search, $replace, $content );
	}

/**
	 * Shorthand HEX color codes.
	 * #FF0000FF -> #f00 -> red
	 * #FF00FF00 -> transparent.
	 *
	 * @param string $content The CSS content to shorten the HEX color codes for
	 *
	 * @return string
	 */
	protected function shortenHexColors( $content ) {
		// shorten repeating patterns within HEX ..
		$content = preg_replace( '/(?<=[: ])#([0-9a-f])\\1([0-9a-f])\\2([0-9a-f])\\3(?:([0-9a-f])\\4)?(?=[; }])/i', '#$1$2$3$4', $content );

// remove alpha channel if it's pointless ..
		$content = preg_replace( '/(?<=[: ])#([0-9a-f]{6})ff(?=[; }])/i', '#$1', $content );
		$content = preg_replace( '/(?<=[: ])#([0-9a-f]{3})f(?=[; }])/i', '#$1', $content );

// replace `transparent` with shortcut ..
		$content = preg_replace( '/(?<=[: ])#[0-9a-f]{6}00(?=[; }])/i', '#fff0', $content );

$colors = array(
			// make these more readable
			'#00f'        => 'blue',
			'#dc143c'     => 'crimson',
			'#0ff'        => 'cyan',
			'#8b0000'     => 'darkred',
			'#696969'     => 'dimgray',
			'#ff69b4'     => 'hotpink',
			'#0f0'        => 'lime',
			'#fdf5e6'     => 'oldlace',
			'#87ceeb'     => 'skyblue',
			'#d8bfd8'     => 'thistle',
			// we can shorten some even more by replacing them with their color name
			'#f0ffff'     => 'azure',
			'#f5f5dc'     => 'beige',
			'#ffe4c4'     => 'bisque',
			'#a52a2a'     => 'brown',
			'#ff7f50'     => 'coral',
			'#ffd700'     => 'gold',
			'#808080'     => 'gray',
			'#008000'     => 'green',
			'#4b0082'     => 'indigo',
			'#fffff0'     => 'ivory',
			'#f0e68c'     => 'khaki',
			'#faf0e6'     => 'linen',
			'#800000'     => 'maroon',
			'#000080'     => 'navy',
			'#808000'     => 'olive',
			'#ffa500'     => 'orange',
			'#da70d6'     => 'orchid',
			'#cd853f'     => 'peru',
			'#ffc0cb'     => 'pink',
			'#dda0dd'     => 'plum',
			'#800080'     => 'purple',
			'#f00'        => 'red',
			'#fa8072'     => 'salmon',
			'#a0522d'     => 'sienna',
			'#c0c0c0'     => 'silver',
			'#fffafa'     => 'snow',
			'#d2b48c'     => 'tan',
			'#008080'     => 'teal',
			'#ff6347'     => 'tomato',
			'#ee82ee'     => 'violet',
			'#f5deb3'     => 'wheat',
			// or the other way around
			'black'       => '#000',
			'fuchsia'     => '#f0f',
			'magenta'     => '#f0f',
			'white'       => '#fff',
			'yellow'      => '#ff0',
			// and also `transparent`
			'transparent' => '#fff0',
		);

return preg_replace_callback(
			'/(?<=[: ])(' . implode( '|', array_keys( $colors ) ) . ')(?=[; }])/i',
			function ( $match ) use ( $colors ) {
				return $colors[ strtolower( $match[0] ) ];
			},
			$content
		);
	}

/**
	 * Convert RGB|HSL color codes.
	 * rgb(255,0,0,.5) -> rgb(255 0 0 / .5).
	 * rgb(255,0,0) -> #f00.
	 *
	 * @param string $content The CSS content to shorten the RGB color codes for
	 *
	 * @return string
	 */
	protected function convertLegacyColors( $content ) {
		/*
			https://drafts.csswg.org/css-color/#color-syntax-legacy
			https://developer.mozilla.org/en-US/docs/Web/CSS/color_value/rgb
			https://developer.mozilla.org/en-US/docs/Web/CSS/color_value/hsl
		*/

// convert legacy color syntax
		$content = preg_replace( '/(rgb)a?$\s*([0-9]{1,3}%?)\s*,\s*([0-9]{1,3}%?)\s*,\s*([0-9]{1,3}%?)\s*,\s*([0,1]?(?:\.[0-9]*)?)\s*$/i', '$1($2 $3 $4 / $5)', $content );
		$content = preg_replace( '/(rgb)a?$\s*([0-9]{1,3}%?)\s*,\s*([0-9]{1,3}%?)\s*,\s*([0-9]{1,3}%?)\s*$/i', '$1($2 $3 $4)', $content );
		$content = preg_replace( '/(hsl)a?$\s*([0-9]+(?:deg|grad|rad|turn)?)\s*,\s*([0-9]{1,3}%)\s*,\s*([0-9]{1,3}%)\s*,\s*([0,1]?(?:\.[0-9]*)?)\s*$/i', '$1($2 $3 $4 / $5)', $content );
		$content = preg_replace( '/(hsl)a?$\s*([0-9]+(?:deg|grad|rad|turn)?)\s*,\s*([0-9]{1,3}%)\s*,\s*([0-9]{1,3}%)\s*$/i', '$1($2 $3 $4)', $content );

// convert `rgb` to `hex`
		$dec = '([01]?[0-9]?[0-9]|2[0-4][0-9]|25[0-5])';
		return preg_replace_callback(
			"/rgb$$dec $dec $dec$/i",
			function ( $match ) {
				return sprintf( '#%02x%02x%02x', $match[1], $match[2], $match[3] );
			},
			$content
		);
	}

/**
	 * Cleanup RGB|HSL|HWB|LCH|LAB
	 * rgb(255 0 0 / 1) -> rgb(255 0 0).
	 * rgb(255 0 0 / 0) -> transparent.
	 *
	 * @param string $content The CSS content to cleanup HSL|HWB|LCH|LAB
	 *
	 * @return string
	 */
	protected function cleanupModernColors( $content ) {
		/*
			https://drafts.csswg.org/css-color/#color-syntax-modern
			https://developer.mozilla.org/en-US/docs/Web/CSS/color_value/hwb
			https://developer.mozilla.org/en-US/docs/Web/CSS/color_value/lch
			https://developer.mozilla.org/en-US/docs/Web/CSS/color_value/lab
			https://developer.mozilla.org/en-US/docs/Web/CSS/color_value/oklch
			https://developer.mozilla.org/en-US/docs/Web/CSS/color_value/oklab
		*/
		$tag = '(rgb|hsl|hwb|(?:(?:ok)?(?:lch|lab)))';

// remove alpha channel if it's pointless ..
		$content = preg_replace( '/' . $tag . '$\s*([^\s]+)\s+([^\s]+)\s+([^\s]+)\s+\/\s+1(?:(?:\.\d?)*|00%)?\s*$/i', '$1($2 $3 $4)', $content );

// replace `transparent` with shortcut ..
		$content = preg_replace( '/' . $tag . '$\s*[^\s]+\s+[^\s]+\s+[^\s]+\s+\/\s+0(?:[\.0%]*)?\s*$/i', '#fff0', $content );

return $content;
	}

/**
	 * Shorten CSS font weights.
	 *
	 * @param string $content The CSS content to shorten the font weights for
	 *
	 * @return string
	 */
	protected function shortenFontWeights( $content ) {
		$weights = array(
			'normal' => 400,
			'bold'   => 700,
		);

$callback = function ( $match ) use ( $weights ) {
			return $match[1] . $weights[ $match[2] ];
		};

return preg_replace_callback( '/(font-weight\s*:\s*)(' . implode( '|', array_keys( $weights ) ) . ')(?=[;}])/', $callback, $content );
	}

/**
	 * Shorthand 0 values to plain 0, instead of e.g. -0em.
	 *
	 * @param string $content The CSS content to shorten the zero values for
	 *
	 * @return string
	 */
	protected function shortenZeroes( $content ) {
		// we don't want to strip units in `calc()` expressions:
		// `5px - 0px` is valid, but `5px - 0` is not
		// `10px * 0` is valid (equates to 0), and so is `10 * 0px`, but
		// `10 * 0` is invalid
		// we've extracted calcs earlier, so we don't need to worry about this

// reusable bits of code throughout these regexes:
		// before & after are used to make sure we don't match lose unintended
		// 0-like values (e.g. in #000, or in http://url/1.0)
		// units can be stripped from 0 values, or used to recognize non 0
		// values (where wa may be able to strip a .0 suffix)
		$before = '(?<=[:(, ])';
		$after  = '(?=[ ,);}])';
		$units  = '(em|ex|%|px|cm|mm|in|pt|pc|ch|rem|vh|vw|vmin|vmax|vm)';

// strip units after zeroes (0px -> 0)
		// NOTE: it should be safe to remove all units for a 0 value, but in
		// practice, Webkit (especially Safari) seems to stumble over at least
		// 0%, potentially other units as well. Only stripping 'px' for now.
		// @see https://github.com/matthiasmullie/minify/issues/60
		$content = preg_replace( '/' . $before . '(-?0*(\.0+)?)(?<=0)px' . $after . '/', '\\1', $content );

// strip 0-digits (.0 -> 0)
		$content = preg_replace( '/' . $before . '\.0+' . $units . '?' . $after . '/', '0\\1', $content );
		// strip trailing 0: 50.10 -> 50.1, 50.10px -> 50.1px
		$content = preg_replace( '/' . $before . '(-?[0-9]+\.[0-9]+)0+' . $units . '?' . $after . '/', '\\1\\2', $content );
		// strip trailing 0: 50.00 -> 50, 50.00px -> 50px
		$content = preg_replace( '/' . $before . '(-?[0-9]+)\.0+' . $units . '?' . $after . '/', '\\1\\2', $content );
		// strip leading 0: 0.1 -> .1, 01.1 -> 1.1
		$content = preg_replace( '/' . $before . '(-?)0+([0-9]*\.[0-9]+)' . $units . '?' . $after . '/', '\\1\\2\\3', $content );

// strip negative zeroes (-0 -> 0) & truncate zeroes (00 -> 0)
		$content = preg_replace( '/' . $before . '-?0+' . $units . '?' . $after . '/', '0\\1', $content );

// IE doesn't seem to understand a unitless flex-basis value (correct -
		// it goes against the spec), so let's add it in again (make it `%`,
		// which is only 1 char: 0%, 0px, 0 anything, it's all just the same)
		// @see https://developer.mozilla.org/nl/docs/Web/CSS/flex
		$content = preg_replace( '/flex:([0-9]+\s[0-9]+\s)0([;\}])/', 'flex:${1}0%${2}', $content );
		$content = preg_replace( '/flex-basis:0([;\}])/', 'flex-basis:0%${1}', $content );

return $content;
	}

/**
	 * Strip empty tags from source code.
	 *
	 * @param string $content
	 *
	 * @return string
	 */
	protected function stripEmptyTags( $content ) {
		$content = preg_replace( '/(?<=^)[^\{\};]+\{\s*\}/', '', $content );
		$content = preg_replace( '/(?<=(\}|;))[^\{\};]+\{\s*\}/', '', $content );

return $content;
	}

/**
	 * Strip comments from source code.
	 */
	protected function stripComments() {
		$this->stripMultilineComments();
	}

/**
	 * Strip whitespace.
	 *
	 * @param string $content The CSS content to strip the whitespace for
	 *
	 * @return string
	 */
	protected function stripWhitespace( $content ) {
		// remove leading & trailing whitespace
		$content = preg_replace( '/^\s*/m', '', $content );
		$content = preg_replace( '/\s*$/m', '', $content );

// replace newlines with a single space
		$content = preg_replace( '/\s+/', ' ', $content );

// remove whitespace around meta characters
		// inspired by stackoverflow.com/questions/15195750/minify-compress-css-with-regex
		$content = preg_replace( '/\s*([\*$~^|]?+=|[{};,>~]|!important\b)\s*/', '$1', $content );
		$content = preg_replace( '/([\[(:>\+])\s+/', '$1', $content );
		$content = preg_replace( '/\s+([\]\)>\+])/', '$1', $content );
		$content = preg_replace( '/\s+(:)(?![^\}]*\{)/', '$1', $content );

// whitespace around + and - can only be stripped inside some pseudo-
		// classes, like `:nth-child(3+2n)`
		// not in things like `calc(3px + 2px)`, shorthands like `3px -2px`, or
		// selectors like `div.weird- p`
		$pseudos = array( 'nth-child', 'nth-last-child', 'nth-last-of-type', 'nth-of-type' );
		$content = preg_replace( '/:(' . implode( '|', $pseudos ) . ')$\s*([+-]?)\s*(.+?)\s*([+-]?)\s*(.*?)\s*$/', ':$1($2$3$4$5)', $content );

// remove semicolon/whitespace followed by closing bracket
		$content = str_replace( ';}', '}', $content );

return trim( $content );
	}

/**
	 * Replace all occurrences of functions that may contain math, where
	 * whitespace around operators needs to be preserved (e.g. calc, clamp).
	 */
	protected function extractMath() {
		$functions = array( 'calc', 'clamp', 'min', 'max' );
		$pattern   = '/\b(' . implode( '|', $functions ) . ')(\(.+?)(?=$|;|})/m';

// PHP only supports $this inside anonymous functions since 5.4
		$minifier = $this;
		$callback = function ( $match ) use ( $minifier, $pattern, &$callback ) {
			$function = $match[1];
			$length   = strlen( $match[2] );
			$expr     = '';
			$opened   = 0;

// the regular expression for extracting math has 1 significant problem:
			// it can't determine the correct closing parenthesis...
			// instead, it'll match a larger portion of code to where it's certain that
			// the calc() musts have ended, and we'll figure out which is the correct
			// closing parenthesis here, by counting how many have opened
			for ( $i = 0; $i < $length; ++$i ) {
				$char  = $match[2][ $i ];
				$expr .= $char;
				if ( $char === '(' ) {
					++$opened;
				} elseif ( $char === ')' && --$opened === 0 ) {
					break;
				}
			}

// now that we've figured out where the calc() starts and ends, extract it
			$count                               = count( $minifier->extracted );
			$placeholder                         = 'math(' . $count . ')';
			$minifier->extracted[ $placeholder ] = $function . '(' . trim( substr( $expr, 1, -1 ) ) . ')';

// and since we've captured more code than required, we may have some leftover
			// calc() in here too - go recursive on the remaining but of code to go figure
			// that out and extract what is needed
			$rest = $minifier->str_replace_first( $function . $expr, '', $match[0] );
			$rest = preg_replace_callback( $pattern, $callback, $rest );

return $placeholder . $rest;
		};

$this->registerPattern( $pattern, $callback );
	}

/**
	 * Replace custom properties, whose values may be used in scenarios where
	 * we wouldn't want them to be minified (e.g. inside calc).
	 */
	protected function extractCustomProperties() {
		// PHP only supports $this inside anonymous functions since 5.4
		$minifier = $this;
		$this->registerPattern(
			'/(?<=^|[;}{])\s*(--[^:;{}"\'\s]+)\s*:([^;{}]+)/m',
			function ( $match ) use ( $minifier ) {
				$placeholder                         = '--custom-' . count( $minifier->extracted ) . ':0';
				$minifier->extracted[ $placeholder ] = $match[1] . ':' . trim( $match[2] );

return $placeholder;
			}
		);
	}

/**
	 * Check if file is small enough to be imported.
	 *
	 * @param string $path The path to the file
	 *
	 * @return bool
	 */
	protected function canImportBySize( $path ) {
		return ( $size = @filesize( $path ) ) && $size <= $this->maxImportSize * 1024;
	}

/**
	 * Check if file a file can be imported, going by the path.
	 *
	 * @param string $path
	 *
	 * @return bool
	 */
	protected function canImportByPath( $path ) {
		return preg_match( '/^(data:|https?:|\\/)/', $path ) === 0;
	}

/**
	 * Return a converter to update relative paths to be relative to the new
	 * destination.
	 *
	 * @param string $source
	 * @param string $target
	 *
	 * @return ConverterInterface
	 */
	protected function getPathConverter( $source, $target ) {
		return new Converter( $source, $target );
	}
}

Name	Type	Size	Owner/Group	Permission	Last Modified	Actions
.	dir	-	mojaomjh/mojaomjh	0755	2025-12-17 09:12:25
..	dir	-	mojaomjh/mojaomjh	0755	2025-12-17 09:12:25
data	dir	-	mojaomjh/mojaomjh	0755	2025-12-17 09:12:25
LICENSE	text/plain	1.03 KB	mojaomjh/mojaomjh	0644	2025-12-17 12:04:56
css.cls.php	text/x-php	26.6 KB	mojaomjh/mojaomjh	0644	2025-12-17 12:04:56
exception.cls.php	text/x-php	464 B	mojaomjh/mojaomjh	0644	2025-12-17 12:04:56
js.cls.php	text/x-php	36.71 KB	mojaomjh/mojaomjh	0644	2025-12-17 12:04:56
minify.cls.php	text/x-php	14.9 KB	mojaomjh/mojaomjh	0644	2025-12-17 12:04:56

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