C:/xampp/htdocs/moodle/lib/minify/lib/Minify.php

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<?php
require_once 'Minify/Source.php';
 
class Minify {
    
    const VERSION = '2.1.3';
    const TYPE_CSS = 'text/css';
    const TYPE_HTML = 'text/html';
    // there is some debate over the ideal JS Content-Type, but this is the
    // Apache default and what Yahoo! uses..
    const TYPE_JS = 'application/x-javascript';
    
    public static $uploaderHoursBehind = 0;
    
    public static $importWarning = "/* See http://code.google.com/p/minify/wiki/CommonProblems#@imports_can_appear_in_invalid_locations_in_combined_CSS_files */\n";
    
    public static function setCache($cache = '', $fileLocking = true)
    {
        if (is_string($cache)) {
            require_once 'Minify/Cache/File.php';
            self::$_cache = new Minify_Cache_File($cache, $fileLocking);
        } else {
            self::$_cache = $cache;
        }
    }
    
    public static function serve($controller, $options = array())
    {
        if (is_string($controller)) {
            // make $controller into object
            $class = 'Minify_Controller_' . $controller;
            if (! class_exists($class, false)) {
                require_once "Minify/Controller/" 
                    . str_replace('_', '/', $controller) . ".php";    
            }
            $controller = new $class();
        }
        
        // set up controller sources and mix remaining options with
        // controller defaults
        $options = $controller->setupSources($options);
        $options = $controller->analyzeSources($options);
        self::$_options = $controller->mixInDefaultOptions($options);
        
        // check request validity
        if (! $controller->sources) {
            // invalid request!
            if (! self::$_options['quiet']) {
                header(self::$_options['badRequestHeader']);
                echo self::$_options['badRequestHeader'];
                return;
            } else {
                list(,$statusCode) = explode(' ', self::$_options['badRequestHeader']);
                return array(
                    'success' => false
                    ,'statusCode' => (int)$statusCode
                    ,'content' => ''
                    ,'headers' => array()
                );
            }
        }
        
        self::$_controller = $controller;
        
        if (self::$_options['debug']) {
            self::_setupDebug($controller->sources);
            self::$_options['maxAge'] = 0;
        }
        
        // determine encoding
        if (self::$_options['encodeOutput']) {
            if (self::$_options['encodeMethod'] !== null) {
                // controller specifically requested this
                $contentEncoding = self::$_options['encodeMethod'];
            } else {
                // sniff request header
                require_once 'HTTP/Encoder.php';
                // depending on what the client accepts, $contentEncoding may be 
                // 'x-gzip' while our internal encodeMethod is 'gzip'. Calling
                // getAcceptedEncoding(false, false) leaves out compress and deflate as options.
                list(self::$_options['encodeMethod'], $contentEncoding) = HTTP_Encoder::getAcceptedEncoding(false, false);
            }
        } else {
            self::$_options['encodeMethod'] = ''; // identity (no encoding)
        }
        
        // check client cache
        require_once 'HTTP/ConditionalGet.php';
        $cgOptions = array(
            'lastModifiedTime' => self::$_options['lastModifiedTime']
            ,'isPublic' => self::$_options['isPublic']
            ,'encoding' => self::$_options['encodeMethod']
        );
        if (self::$_options['maxAge'] > 0) {
            $cgOptions['maxAge'] = self::$_options['maxAge'];
        }
        $cg = new HTTP_ConditionalGet($cgOptions);
        if ($cg->cacheIsValid) {
            // client's cache is valid
            if (! self::$_options['quiet']) {
                $cg->sendHeaders();
                return;
            } else {
                return array(
                    'success' => true
                    ,'statusCode' => 304
                    ,'content' => ''
                    ,'headers' => $cg->getHeaders()
                );
            }
        } else {
            // client will need output
            $headers = $cg->getHeaders();
            unset($cg);
        }
        
        if (self::$_options['contentType'] === self::TYPE_CSS
            && self::$_options['rewriteCssUris']) {
            reset($controller->sources);
            while (list($key, $source) = each($controller->sources)) {
                if ($source->filepath 
                    && !isset($source->minifyOptions['currentDir'])
                    && !isset($source->minifyOptions['prependRelativePath'])
                ) {
                    $source->minifyOptions['currentDir'] = dirname($source->filepath);
                }
            }
        }
        
        // check server cache
        if (null !== self::$_cache) {
            // using cache
            // the goal is to use only the cache methods to sniff the length and 
            // output the content, as they do not require ever loading the file into
            // memory.
            $cacheId = 'minify_' . self::_getCacheId();
            $fullCacheId = (self::$_options['encodeMethod'])
                ? $cacheId . '.gz'
                : $cacheId;
            // check cache for valid entry
            $cacheIsReady = self::$_cache->isValid($fullCacheId, self::$_options['lastModifiedTime']); 
            if ($cacheIsReady) {
                $cacheContentLength = self::$_cache->getSize($fullCacheId);    
            } else {
                // generate & cache content
                $content = self::_combineMinify();
                self::$_cache->store($cacheId, $content);
                if (function_exists('gzencode')) {
                    self::$_cache->store($cacheId . '.gz', gzencode($content, self::$_options['encodeLevel']));
                }
            }
        } else {
            // no cache
            $cacheIsReady = false;
            $content = self::_combineMinify();
        }
        if (! $cacheIsReady && self::$_options['encodeMethod']) {
            // still need to encode
            $content = gzencode($content, self::$_options['encodeLevel']);
        }
        
        // add headers
        $headers['Content-Length'] = $cacheIsReady
            ? $cacheContentLength
            : strlen($content);
        $headers['Content-Type'] = self::$_options['contentTypeCharset']
            ? self::$_options['contentType'] . '; charset=' . self::$_options['contentTypeCharset']
            : self::$_options['contentType'];
        if (self::$_options['encodeMethod'] !== '') {
            $headers['Content-Encoding'] = $contentEncoding;
        }
        if (self::$_options['encodeOutput']) {
            $headers['Vary'] = 'Accept-Encoding';
        }

        if (! self::$_options['quiet']) {
            // output headers & content
            foreach ($headers as $name => $val) {
                header($name . ': ' . $val);
            }
            if ($cacheIsReady) {
                self::$_cache->display($fullCacheId);
            } else {
                echo $content;
            }
        } else {
            return array(
                'success' => true
                ,'statusCode' => 200
                ,'content' => $cacheIsReady
                    ? self::$_cache->fetch($fullCacheId)
                    : $content
                ,'headers' => $headers
            );
        }
    }
    
    public static function combine($sources, $options = array())
    {
        $cache = self::$_cache;
        self::$_cache = null;
        $options = array_merge(array(
            'files' => (array)$sources
            ,'quiet' => true
            ,'encodeMethod' => ''
            ,'lastModifiedTime' => 0
        ), $options);
        $out = self::serve('Files', $options);
        self::$_cache = $cache;
        return $out['content'];
    }
    
    public static function setDocRoot($unsetPathInfo = false)
    {
        if (isset($_SERVER['SERVER_SOFTWARE'])
            && 0 === strpos($_SERVER['SERVER_SOFTWARE'], 'Microsoft-IIS/')
        ) {
            $_SERVER['DOCUMENT_ROOT'] = rtrim(substr(
                $_SERVER['PATH_TRANSLATED']
                ,0
                ,strlen($_SERVER['PATH_TRANSLATED']) - strlen($_SERVER['SCRIPT_NAME'])
            ), '\\');
            if ($unsetPathInfo) {
                unset($_SERVER['PATH_INFO']);
            }
            require_once 'Minify/Logger.php';
            Minify_Logger::log("setDocRoot() set DOCUMENT_ROOT to \"{$_SERVER['DOCUMENT_ROOT']}\"");
        }
    }
    
    private static $_cache = null;
    
    protected static $_controller = null;
    
    protected static $_options = null;
    
    protected static function _setupDebug($sources)
    {
        foreach ($sources as $source) {
            $source->minifier = array('Minify_Lines', 'minify');
            $id = $source->getId();
            $source->minifyOptions = array(
                'id' => (is_file($id) ? basename($id) : $id)
            );
        }
    }
    
    protected static function _combineMinify()
    {
        $type = self::$_options['contentType']; // ease readability
        
        // when combining scripts, make sure all statements separated and
        // trailing single line comment is terminated
        $implodeSeparator = ($type === self::TYPE_JS)
            ? "\n;"
            : '';
        // allow the user to pass a particular array of options to each
        // minifier (designated by type). source objects may still override
        // these
        $defaultOptions = isset(self::$_options['minifierOptions'][$type])
            ? self::$_options['minifierOptions'][$type]
            : array();
        // if minifier not set, default is no minification. source objects
        // may still override this
        $defaultMinifier = isset(self::$_options['minifiers'][$type])
            ? self::$_options['minifiers'][$type]
            : false;
       
        if (Minify_Source::haveNoMinifyPrefs(self::$_controller->sources)) {
            // all source have same options/minifier, better performance
            // to combine, then minify once
            foreach (self::$_controller->sources as $source) {
                $pieces[] = $source->getContent();
            }
            $content = implode($implodeSeparator, $pieces);
            if ($defaultMinifier) {
                self::$_controller->loadMinifier($defaultMinifier);
                $content = call_user_func($defaultMinifier, $content, $defaultOptions);    
            }
        } else {
            // minify each source with its own options and minifier, then combine
            foreach (self::$_controller->sources as $source) {
                // allow the source to override our minifier and options
                $minifier = (null !== $source->minifier)
                    ? $source->minifier
                    : $defaultMinifier;
                $options = (null !== $source->minifyOptions)
                    ? array_merge($defaultOptions, $source->minifyOptions)
                    : $defaultOptions;
                if ($minifier) {
                    self::$_controller->loadMinifier($minifier);
                    // get source content and minify it
                    $pieces[] = call_user_func($minifier, $source->getContent(), $options);     
                } else {
                    $pieces[] = $source->getContent();     
                }
            }
            $content = implode($implodeSeparator, $pieces);
        }
        
        if ($type === self::TYPE_CSS && false !== strpos($content, '@import')) {
            $content = self::_handleCssImports($content);
        }
        
        // do any post-processing (esp. for editing build URIs)
        if (self::$_options['postprocessorRequire']) {
            require_once self::$_options['postprocessorRequire'];
        }
        if (self::$_options['postprocessor']) {
            $content = call_user_func(self::$_options['postprocessor'], $content, $type);
        }
        return $content;
    }
    
    protected static function _getCacheId()
    {
        return md5(serialize(array(
            Minify_Source::getDigest(self::$_controller->sources)
            ,self::$_options['minifiers'] 
            ,self::$_options['minifierOptions']
            ,self::$_options['postprocessor']
            ,self::$_options['bubbleCssImports']
        )));
    }
    
    protected static function _handleCssImports($css)
    {
        if (self::$_options['bubbleCssImports']) {
            // bubble CSS imports
            preg_match_all('/@import.*?;/', $css, $imports);
            $css = implode('', $imports[0]) . preg_replace('/@import.*?;/', '', $css);
        } else if ('' !== self::$importWarning) {
            // remove comments so we don't mistake { in a comment as a block
            $noCommentCss = preg_replace('@/\\*[\\s\\S]*?\\*/@', '', $css);
            $lastImportPos = strrpos($noCommentCss, '@import');
            $firstBlockPos = strpos($noCommentCss, '{');
            if (false !== $lastImportPos
                && false !== $firstBlockPos
                && $firstBlockPos < $lastImportPos
            ) {
                // { appears before @import : prepend warning
                $css = self::$importWarning . $css;
            }
        }
        return $css;
    }
}