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: /home/mjbynoyq/pmlnskorea.org/wp-content/plugins/litespeed-cache/lib/css_js_min/minify/ [ drwxr-xr-x ]
<?php
/**
* css.cls.php - modified PHP implementation of Matthias Mullie's CSS minifier
*
* @author Matthias Mullie <[email protected]>
* @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-ized.
*
* @url(image.jpg) images 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 );
}
}