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<?php |
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class autoptimizeStyles extends autoptimizeBase |
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{ |
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private $css = array(); |
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private $csscode = array(); |
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private $url = array(); |
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private $restofcontent = ''; |
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|
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//Reads the page and collects style tags |
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public function read($options) |
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{ |
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//Remove everything that's not the header |
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if($options['justhead'] == true) |
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{ |
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$content = explode('</head>',$this->content,2); |
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$this->content = $content[0].'</head>'; |
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$this->restofcontent = $content[1]; |
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} |
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|
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//Save IE hacks |
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$this->content = preg_replace('#(<\!--\[if.*\]>.*<\!\[endif\]-->)#Usie', |
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'\'%%IEHACK%%\'.base64_encode("$1").\'%%IEHACK%%\'',$this->content); |
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|
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//Get <style> and <link> |
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if(preg_match_all('#(<style[^>]*>.*</style>)|(<link[^>]*text/css[^>]*>)#Usmi',$this->content,$matches)) |
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{ |
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foreach($matches[0] as $tag) |
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{ |
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if(preg_match('#<link.*href=("|\')(.*)("|\')#Usmi',$tag,$source)) |
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{ |
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//<link> |
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$url = current(explode('?',$source[2],2)); |
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$path = $this->getpath($url); |
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$media = array('all'); |
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|
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if($path !==false && preg_match('#\.css$#',$path)) |
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{ |
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//Good link |
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//Get the media |
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if(strpos($tag,'media=')!==false) |
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{ |
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$medias = preg_replace('#^.*media=(?:"|\')(.*)(?:"|\').*$#U','$1',$tag); |
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$medias = explode(',',$medias); |
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$media = array(); |
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foreach($medias as $elem) |
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{ |
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$media[] = current(explode(' ',trim($elem),2)); |
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} |
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}else{ |
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//No media specified - applies to all |
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$media = array('all'); |
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} |
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|
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$this->css[] = array($media,$path); |
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}else{ |
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//Link is dynamic (.php etc) |
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$tag = ''; |
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} |
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}else{ |
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//<style> |
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preg_match('#<style.*>(.*)</style>#Usmi',$tag,$code); |
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$code = preg_replace('#^.*<!\[CDATA\[(?:\s*\*/)?(.*)(?://|/\*)\s*?\]\]>.*$#sm','$1',$code[1]); |
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$this->css[] = array('all','INLINE;'.$code); |
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} |
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|
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//Remove the original style tag |
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$this->content = str_replace($tag,'',$this->content); |
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} |
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|
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return true; |
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} |
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|
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//No styles :( |
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return false; |
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} |
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|
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//Joins and optimizes CSS |
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public function minify() |
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{ |
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foreach($this->css as $group) |
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{ |
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list($media,$css) = $group; |
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if(preg_match('#^INLINE;#',$css)) |
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{ |
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//<style> |
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$css = preg_replace('#^INLINE;#','',$css); |
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$css = $this->fixurls(ABSPATH.'/index.php',$css); |
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if(!isset($this->csscode['all'])) |
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$this->csscode['all'] = ''; |
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$this->csscode['all'] .= "\n/*FILESTART*/".$css; |
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}else{ |
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//<link> |
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if($css !== false && file_exists($css) && is_readable($css)) |
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{ |
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$css = $this->fixurls($css,file_get_contents($css)); |
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foreach($media as $elem) |
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{ |
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if(!isset($this->csscode[$elem])) |
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$this->csscode[$elem] = ''; |
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$this->csscode[$elem] .= "\n/*FILESTART*/".$css; |
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} |
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}/*else{ |
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//Couldn't read CSS. Maybe getpath isn't working? |
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}*/ |
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} |
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} |
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|
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//Check for duplicate code |
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$md5list = array(); |
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$tmpcss = $this->csscode; |
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foreach($tmpcss as $media => $code) |
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{ |
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$md5sum = md5($code); |
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$medianame = $media; |
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foreach($md5list as $med => $sum) |
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{ |
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//If same code |
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if($sum === $md5sum) |
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{ |
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//Add the merged code |
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$medianame = $med.', '.$media; |
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$this->csscode[$medianame] = $code; |
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$md5list[$medianame] = $md5list[$med]; |
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unset($this->csscode[$med], $this->csscode[$media]); |
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unset($md5list[$med]); |
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} |
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} |
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$md5list[$medianame] = $md5sum; |
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} |
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unset($tmpcss); |
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|
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//Manage @imports, while is for recursive import management |
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foreach($this->csscode as &$thiscss) |
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{ |
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//Flag to trigger import reconstitution |
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$fiximports = false; |
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while(preg_match_all('#@import.*(?:;|$)#Um',$thiscss,$matches)) |
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{ |
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foreach($matches[0] as $import) |
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{ |
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$url = trim(preg_replace('#.+((?:https?|ftp)://.*\.css)(?:\s|"|\').+#','$1',$import)," \t\n\r\0\x0B\"'"); |
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$path = $this->getpath($url); |
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if(file_exists($path) && is_readable($path)) |
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{ |
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$code = $this->fixurls($path,file_get_contents($path)); |
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/*$media = preg_replace('#^.*(?:\)|"|\')(.*)(?:\s|;).*$#','$1',$import); |
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$media = array_map('trim',explode(' ',$media)); |
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if(empty($media)) |
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{ |
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$thiscss = [...] (Line under) |
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}else{ |
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//media in @import - how should I handle these? |
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//TODO: Infinite recursion! |
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}*/ |
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$thiscss = preg_replace('#(/\*FILESTART\*/.*)'.preg_quote($import,'#').'#Us',$code.'$1',$thiscss); |
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}else{ |
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//getpath is not working? |
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//Encode so preg_match doesn't see it |
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$thiscss = str_replace($import,'/*IMPORT*/'.base64_encode($import).'/*IMPORT*/',$thiscss); |
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$fiximports = true; |
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} |
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} |
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} |
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|
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//Recover imports |
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if($fiximports) |
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{ |
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$thiscss = preg_replace('#/\*IMPORT\*/(.*)/\*IMPORT\*/#Use','base64_decode("$1")',$thiscss); |
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} |
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} |
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unset($thiscss); |
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|
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//$this->csscode has all the uncompressed code now. |
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if(class_exists('Minify_CSS_Compressor')) |
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{ |
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foreach($this->csscode as &$code) |
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{ |
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$code = trim(Minify_CSS_Compressor::process($code)); |
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} |
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unset($code); |
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return true; |
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} |
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|
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return false; |
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} |
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|
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//Caches the CSS in uncompressed, deflated and gzipped form. |
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public function cache() |
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{ |
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foreach($this->csscode as $media => $code) |
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{ |
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$md5 = md5($code); |
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$cache = new autoptimizeCache($md5); |
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if(!$cache->check()) |
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{ |
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//Cache our code |
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$cache->cache($code,'text/css'); |
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} |
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$this->url[$media] = AUTOPTIMIZE_CACHE_URL.$cache->getname(); |
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} |
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} |
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|
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//Returns the content |
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public function getcontent() |
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{ |
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//Restore IE hacks |
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$this->content = preg_replace('#%%IEHACK%%(.*)%%IEHACK%%#Usie','base64_decode("$1")',$this->content); |
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|
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//Restore the full content |
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if(!empty($this->restofcontent)) |
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{ |
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$this->content .= $this->restofcontent; |
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$this->restofcontent = ''; |
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} |
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|
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//Add the new stylesheets |
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foreach($this->url as $media => $url) |
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{ |
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$this->content = str_replace('</head>','<link type="text/css" media="'.$media.'" href="'.$url.'" rel="stylesheet" /></head>',$this->content); |
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} |
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|
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//Return the modified stylesheet |
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return $this->content; |
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} |
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|
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private function fixurls($file,$code) |
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{ |
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$file = str_replace(ABSPATH,'/',$file); //Sth like /wp-content/file.css |
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$dir = dirname($file); //Like /wp-content |
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|
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if(preg_match_all('#url\((.*)\)#Usi',$code,$matches)) |
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{ |
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$replace = array(); |
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foreach($matches[1] as $k => $url) |
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{ |
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//Remove quotes |
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$url = trim($url," \t\n\r\0\x0B\"'"); |
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if(substr($url,0,1)=='/' || preg_match('#^(https?|ftp)://#i',$url)) |
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{ |
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//URL is absolute |
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continue; |
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}else{ |
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//relative URL. Let's fix it! |
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$newurl = get_settings('home').str_replace('//','/',$dir.'/'.$url); //http://yourblog.com/wp-content/../image.png |
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$hash = md5($url); |
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$code = str_replace($matches[0][$k],$hash,$code); |
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$replace[$hash] = 'url('.$newurl.')'; |
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} |
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} |
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|
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//Do the replacing here to avoid breaking URLs |
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$code = str_replace(array_keys($replace),array_values($replace),$code); |
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} |
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|
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return $code; |
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} |
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} |
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|
