<?php

	class cCSSCompiler

	{

		var $output		= "";



		var $debug		= false;



		function cCSSCompiler() {



		}



		function readFromString($sString) {

			$this->output	= $sString;

		}



		function readFromFile($sFileName) {

			$this->output	= $this->output . join("", file($sFileName));

		}



		function getOutput() {

			return $this->output;

		}



		function stripComments() {

			$sData	= $this->output;



			// Strip '/* comment */' comments

			$sData	= preg_replace('/\/\*.+\*\//Us', "", $sData);



			$this->output	= $sData;

		}



		function stripSpaces() {

			$sData	= $this->output;



			// replace tabs with spaces

			$sData	= str_replace("	",			" ",		$sData);



			// Strip ' : ' spaces around

			$sData	= preg_replace('/ *([=\+\:\|\^<>\{\};,]) */', '$1', $sData);



			// strip all more than one spaces

			$sData	= preg_replace("/\s\s+/",	"",			$sData);



			$sData	= preg_replace("/;;+/",		";",		$sData);

//			$sData	= str_replace(";}",			"}",		$sData);	// If enabled, causes vendor prefixes regexp issues, todo later



			$this->output	= $sData;

		}



		function obfuscate() {

			$sCSS	= $this->output;



			// Rewrite display:inline-block to display:inline (IE8-)

			// display:inline-block

			//	-> display:inline-block;

			//	-> *display:inline;

			$sCSS	= preg_replace("/display\s*:\s*inline-block/",	"display:inline-block;zoom:1;*display:inline",		$sCSS);



			// Rewrite opacity

			// opacity : .5

			//	-> opacity: .5;

			//	-> -ms-filter:Alpha(opacity=' + nOpacity * 100 + ');

			//	-> filter:Alpha(opacity=' + nOpacity * 100 + ');

			$sCSS	= preg_replace_callback("/(?:[^-])opacity\s*:\s*(\d?\.?\d+)/",	"cCSSCompiler_replaceOpacity",			$sCSS);



			// add vendor prefixed styles

			$sBefore	= "$1$2$3$4-";

			$sAfter		= "-$2$3$4";

			// IE

			$sCSS	= preg_replace("/([\s;{])(transition\-?\w*\s*:\s*)([^\n;}]+)([\n;}])/", $sBefore . "ms" . $sAfter, $sCSS);

			$sCSS	= preg_replace("/([\s;{])(transform\-?\w*\s*:\s*)([^\n;}]+)([\n;}])/", $sBefore . "ms" . $sAfter, $sCSS);

			// Opera

			$sCSS	= preg_replace("/([\s;{])(text-overflow\s*:\s*)([^\n;}]+)([\n;}])/", $sBefore . "o" . $sAfter, $sCSS);

			$sCSS	= preg_replace("/([\s;{])(transition\-?\w*\s*:\s*)([^\n;}]+)([\n;}])/", $sBefore . "o" . $sAfter, $sCSS);

			$sCSS	= preg_replace("/([\s;{])(transform\-?\w*\s*:\s*)([^\n;}]+)([\n;}])/", $sBefore . "o" . $sAfter, $sCSS);

			// WebKit

			$sCSS	= preg_replace("/([\s;{])(text-overflow\s*:\s*)([^\n;}]+)([\n;}])/", $sBefore . "webkit" . $sAfter, $sCSS);

			$sCSS	= preg_replace("/([\s;{])(box-shadow\s*:\s*)([^\n;}]+)([\n;}])/", $sBefore . "webkit" . $sAfter, $sCSS);

			$sCSS	= preg_replace("/([\s;{])(outline-radius\s*:\s*)([^\n;}]+)([\n;}])/", $sBefore . "webkit" . $sAfter, $sCSS);

			$sCSS	= preg_replace("/([\s;{])(border-radius\s*:\s*)([^\n;}]+)([\n;}])/", $sBefore . "webkit" . $sAfter, $sCSS);

			$sCSS	= preg_replace("/([\s;{])(transition\-?\w*\s*:\s*)([^\n;}]+)([\n;}])/", $sBefore . "webkit" . $sAfter, $sCSS);

			$sCSS	= preg_replace("/([\s;{])(transform\-?\w*\s*:\s*)([^\n;}]+)([\n;}])/", $sBefore . "webkit" . $sAfter, $sCSS);

			// Gecko

			$sCSS	= preg_replace("/([\s;{])(text-overflow\s*:\s*)([^\n;}]+)([\n;}])/", $sBefore . "moz" . $sAfter, $sCSS);

			$sCSS	= preg_replace("/([\s;{])(box-shadow\s*:\s*)([^\n;}]+)([\n;}])/", $sBefore . "moz" . $sAfter, $sCSS);

			$sCSS	= preg_replace("/([\s;{])(outline-radius\s*:\s*)([^\n;}]+)([\n;}])/", $sBefore . "moz" . $sAfter, $sCSS);

			$sCSS	= preg_replace("/([\s;{])(border-radius\s*:\s*)([^\n;}]+)([\n;}])/", $sBefore . "moz" . $sAfter, $sCSS);

			$sCSS	= preg_replace("/([\s;{])(box-sizing\s*:\s*)([^\n;}]+)([\n;}])/", $sBefore . "moz" . $sAfter, $sCSS);

			$sCSS	= preg_replace("/([\s;{])(transition\-?\w*\s*:\s*)([^\n;}]+)([\n;}])/", $sBefore . "moz" . $sAfter, $sCSS);

			$sCSS	= preg_replace("/([\s;{])(transform\-?\w*\s*:\s*)([^\n;}]+)([\n;}])/", $sBefore . "moz" . $sAfter, $sCSS);

			//

			$sBefore	= $sBefore . 'moz-border-radius-';

			$sAfter		= ':$3$4';

			$sCSS	= preg_replace("/([\s;{])(border-top-left-radius\s*:\s*)([^\n;}]+)([\n;}])/", $sBefore . "topleft" . $sAfter, $sCSS);

			$sCSS	= preg_replace("/([\s;{])(border-top-right-radius\s*:\s*)([^\n;}]+)([\n;}])/", $sBefore . "topright" . $sAfter, $sCSS);

			$sCSS	= preg_replace("/([\s;{])(border-bottom-left-radius\s*:\s*)([^\n;}]+)([\n;}])/", $sBefore . "bottomleft" . $sAfter, $sCSS);

			$sCSS	= preg_replace("/([\s;{])(border-bottom-right-radius\s*:\s*)([^\n;}]+)([\n;}])/", $sBefore . "bottomright" . $sAfter, $sCSS);



			// Remove prefix declaration

			$sCSS	= preg_replace("/@namespace\s+([\w-]+\s+)?(url\()?(['\"])?[^'\";\s]+(['\"])?\)?;?/", "", $sCSS);



			//

			$aCSS	= array();

			if (preg_match_all("/([^{]+)({[^}]*})/", $sCSS, $aRules)) {

				for ($nIndex = 0, $nLength = count($aRules[0]); $nIndex < $nLength; $nIndex++) {



					$sCSSSelector	= $aRules[1][$nIndex];

					$sCSSSelector	= preg_replace("/\|/", '-', $sCSSSelector);								// Namespace

					$sCSSSelector	= preg_replace("/(^|[\s>+~,}]|not\()([\w-])/", '$1.$2', $sCSSSelector);	// Element

					$sCSSSelector	= preg_replace("/\[([\w-]+)=?([\w-]+)?\]/", '-$1-$2', $sCSSSelector);	// Attribute

					$sCSSSelector	= preg_replace("/::/", '--', $sCSSSelector);							// Pseudo-element

					$sCSSSelector	= preg_replace("/:nth-child\((\d+)\)/", '_nth-child-$1', $sCSSSelector);// Pseudo-class nth-child

					$sCSSSelector	= preg_replace("/:(?!last-child|first-child|not)/", '_', $sCSSSelector);// Pseudo-class

//					$sCSSSelector	= preg_replace("/>/g, '--' + "gateway" + '>', $sCSSSelector);

//					$sCSSSelector	= preg_replace("/(--gateway){2,}/g, '--' + "gateway", $sCSSSelector);	// > selector



					$aCSS[]	= $sCSSSelector;

					$aCSS[]	= $aRules[2][$nIndex];

				}



				$sCSS	= join('', $aCSS);

			}

			$this->output	= $sCSS;

		}

	}



	function cCSSCompiler_replaceOpacity($matches) {

		return $matches[0] . ";" .

				"-ms-filter:\"progid:DXImageTransform.Microsoft.Alpha(opacity=" . ($matches[1] * 100) . ")\";".

				"*filter:progid:DXImageTransform.Microsoft.Alpha(opacity=" . ($matches[1] * 100) . ")";

	}



?>