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<?php
/**
* Thin wrapper around css minifiers to avoid rewriting a bunch of existing code.
*/
if ( ! defined( 'ABSPATH' ) ) {
exit;
}
class autoptimizeCSSmin
{
/**
* Minifier instance.
*
* @var Autoptimize\tubalmartin\CssMin\Minifier|null
*/
protected $minifier = null;
/**
* Construtor.
*
* @param bool $raise_limits Whether to raise memory limits or not. Default true.
*/
public function __construct( $raise_limits = true )
{
$this->minifier = new Autoptimize\tubalmartin\CssMin\Minifier( $raise_limits );
}
/**
* Runs the minifier on given string of $css.
* Returns the minified css.
*
* @param string $css CSS to minify.
*
* @return string
*/
public function run( $css )
{
// hide calc() if filter says yes (as YUI CSS compressor PHP port has problems retaining spaces around + and - operators).
// regex see tests at https://regex101.com/r/ofGQG9/1
if ( apply_filters( 'autoptimize_filter_css_hide_calc', true ) ) {
$css = autoptimizeBase::replace_contents_with_marker_if_exists( 'CALC', 'calc(', '#(calc|min|max|clamp)\([^;}]*\)#m', $css );
}
// minify.
$result = $this->minifier->run( $css );
// restore calc() if filter says yes.
if ( apply_filters( 'autoptimize_filter_css_hide_calc', true ) ) {
$result = autoptimizeBase::restore_marked_content( 'CALC', $result );
}
return $result;
}
/**
* Static helper.
*
* @param string $css CSS to minify.
*
* @return string
*/
public static function minify( $css )
{
$minifier = new self();
return $minifier->run( $css );
}
}