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Diffstat (limited to 'lib/exe/css.php')
| -rw-r--r-- | lib/exe/css.php | 343 |
1 files changed, 343 insertions, 0 deletions
diff --git a/lib/exe/css.php b/lib/exe/css.php new file mode 100644 index 000000000..69b512205 --- /dev/null +++ b/lib/exe/css.php @@ -0,0 +1,343 @@ +<?php +/** + * DokuWiki StyleSheet creator + * + * @license GPL 2 (http://www.gnu.org/licenses/gpl.html) + * @author Andreas Gohr <andi@splitbrain.org> + */ + +if(!defined('DOKU_INC')) define('DOKU_INC',dirname(__FILE__).'/../../'); +if(!defined('NOSESSION')) define('NOSESSION',true); // we do not use a session or authentication here (better caching) +if(!defined('DOKU_DISABLE_GZIP_OUTPUT')) define('DOKU_DISABLE_GZIP_OUTPUT',1); // we gzip ourself here +require_once(DOKU_INC.'inc/init.php'); + +// Main (don't run when UNIT test) +if(!defined('SIMPLE_TEST')){ + header('Content-Type: text/css; charset=utf-8'); + css_out(); +} + + +// ---------------------- functions ------------------------------ + +/** + * Output all needed Styles + * + * @author Andreas Gohr <andi@splitbrain.org> + */ +function css_out(){ + global $conf; + global $lang; + global $config_cascade; + + $mediatype = 'screen'; + if (isset($_REQUEST['s']) && + in_array($_REQUEST['s'], array('all', 'print', 'feed'))) { + $mediatype = $_REQUEST['s']; + } + + $tpl = trim(preg_replace('/[^\w-]+/','',$_REQUEST['t'])); + if($tpl){ + $tplinc = DOKU_INC.'lib/tpl/'.$tpl.'/'; + $tpldir = DOKU_BASE.'lib/tpl/'.$tpl.'/'; + }else{ + $tplinc = tpl_incdir(); + $tpldir = tpl_basedir(); + } + + // The generated script depends on some dynamic options + $cache = new cache('styles'.$_SERVER['HTTP_HOST'].$_SERVER['SERVER_PORT'].DOKU_BASE.$tplinc.$mediatype,'.css'); + + // load template styles + $tplstyles = array(); + if(@file_exists($tplinc.'style.ini')){ + $ini = parse_ini_file($tplinc.'style.ini',true); + foreach($ini['stylesheets'] as $file => $mode){ + $tplstyles[$mode][$tplinc.$file] = $tpldir; + } + } + + // Array of needed files and their web locations, the latter ones + // are needed to fix relative paths in the stylesheets + $files = array(); + // load core styles + $files[DOKU_INC.'lib/styles/'.$mediatype.'.css'] = DOKU_BASE.'lib/styles/'; + // load jQuery-UI theme + $files[DOKU_INC.'lib/scripts/jquery/jquery-ui-theme/smoothness.css'] = DOKU_BASE.'lib/scripts/jquery/jquery-ui-theme/'; + // load plugin styles + $files = array_merge($files, css_pluginstyles($mediatype)); + // load template styles + if (isset($tplstyles[$mediatype])) { + $files = array_merge($files, $tplstyles[$mediatype]); + } + // if old 'default' userstyle setting exists, make it 'screen' userstyle for backwards compatibility + if (isset($config_cascade['userstyle']['default'])) { + $config_cascade['userstyle']['screen'] = $config_cascade['userstyle']['default']; + } + // load user styles + if(isset($config_cascade['userstyle'][$mediatype])){ + $files[$config_cascade['userstyle'][$mediatype]] = DOKU_BASE; + } + // load rtl styles + // @todo: this currently adds the rtl styles only to the 'screen' media type + // but 'print' and 'all' should also be supported + if ($mediatype=='screen') { + if($lang['direction'] == 'rtl'){ + if (isset($tplstyles['rtl'])) $files = array_merge($files, $tplstyles['rtl']); + } + } + + $cache_files = array_merge(array_keys($files), getConfigFiles('main')); + $cache_files[] = $tplinc.'style.ini'; + $cache_files[] = __FILE__; + + // check cache age & handle conditional request + // This may exit if a cache can be used + http_cached($cache->cache, + $cache->useCache(array('files' => $cache_files))); + + // start output buffering and build the stylesheet + ob_start(); + + // print the default classes for interwiki links and file downloads + css_interwiki(); + css_filetypes(); + + // load files + foreach($files as $file => $location){ + print css_loadfile($file, $location); + } + + // end output buffering and get contents + $css = ob_get_contents(); + ob_end_clean(); + + // apply style replacements + $css = css_applystyle($css,$tplinc); + + // place all @import statements at the top of the file + $css = css_moveimports($css); + + // compress whitespace and comments + if($conf['compress']){ + $css = css_compress($css); + } + + // embed small images right into the stylesheet + if($conf['cssdatauri']){ + $base = preg_quote(DOKU_BASE,'#'); + $css = preg_replace_callback('#(url\([ \'"]*)('.$base.')(.*?(?:\.(png|gif)))#i','css_datauri',$css); + } + + http_cached_finish($cache->cache, $css); +} + +/** + * Does placeholder replacements in the style according to + * the ones defined in a templates style.ini file + * + * @author Andreas Gohr <andi@splitbrain.org> + */ +function css_applystyle($css,$tplinc){ + if(@file_exists($tplinc.'style.ini')){ + $ini = parse_ini_file($tplinc.'style.ini',true); + $css = strtr($css,$ini['replacements']); + } + return $css; +} + +/** + * Prints classes for interwikilinks + * + * Interwiki links have two classes: 'interwiki' and 'iw_$name>' where + * $name is the identifier given in the config. All Interwiki links get + * an default style with a default icon. If a special icon is available + * for an interwiki URL it is set in it's own class. Both classes can be + * overwritten in the template or userstyles. + * + * @author Andreas Gohr <andi@splitbrain.org> + */ +function css_interwiki(){ + + // default style + echo 'a.interwiki {'; + echo ' background: transparent url('.DOKU_BASE.'lib/images/interwiki.png) 0px 1px no-repeat;'; + echo ' padding: 1px 0px 1px 16px;'; + echo '}'; + + // additional styles when icon available + $iwlinks = getInterwiki(); + foreach(array_keys($iwlinks) as $iw){ + $class = preg_replace('/[^_\-a-z0-9]+/i','_',$iw); + if(@file_exists(DOKU_INC.'lib/images/interwiki/'.$iw.'.png')){ + echo "a.iw_$class {"; + echo ' background-image: url('.DOKU_BASE.'lib/images/interwiki/'.$iw.'.png)'; + echo '}'; + }elseif(@file_exists(DOKU_INC.'lib/images/interwiki/'.$iw.'.gif')){ + echo "a.iw_$class {"; + echo ' background-image: url('.DOKU_BASE.'lib/images/interwiki/'.$iw.'.gif)'; + echo '}'; + } + } +} + +/** + * Prints classes for file download links + * + * @author Andreas Gohr <andi@splitbrain.org> + */ +function css_filetypes(){ + + // default style + echo '.mediafile {'; + echo ' background: transparent url('.DOKU_BASE.'lib/images/fileicons/file.png) 0px 1px no-repeat;'; + echo ' padding-left: 18px;'; + echo ' padding-bottom: 1px;'; + echo '}'; + + // additional styles when icon available + // scan directory for all icons + $exts = array(); + if($dh = opendir(DOKU_INC.'lib/images/fileicons')){ + while(false !== ($file = readdir($dh))){ + if(preg_match('/([_\-a-z0-9]+(?:\.[_\-a-z0-9]+)*?)\.(png|gif)/i',$file,$match)){ + $ext = strtolower($match[1]); + $type = '.'.strtolower($match[2]); + if($ext!='file' && (!isset($exts[$ext]) || $type=='.png')){ + $exts[$ext] = $type; + } + } + } + closedir($dh); + } + foreach($exts as $ext=>$type){ + $class = preg_replace('/[^_\-a-z0-9]+/','_',$ext); + echo ".mf_$class {"; + echo ' background-image: url('.DOKU_BASE.'lib/images/fileicons/'.$ext.$type.')'; + echo '}'; + } +} + +/** + * Loads a given file and fixes relative URLs with the + * given location prefix + */ +function css_loadfile($file,$location=''){ + if(!@file_exists($file)) return ''; + $css = io_readFile($file); + if(!$location) return $css; + + $css = preg_replace('#(url\([ \'"]*)(?!/|data:|http://|https://| |\'|")#','\\1'.$location,$css); + $css = preg_replace('#(@import\s+[\'"])(?!/|data:|http://|https://)#', '\\1'.$location, $css); + + return $css; +} + +/** + * Converte local image URLs to data URLs if the filesize is small + * + * Callback for preg_replace_callback + */ +function css_datauri($match){ + global $conf; + + $pre = unslash($match[1]); + $base = unslash($match[2]); + $url = unslash($match[3]); + $ext = unslash($match[4]); + + $local = DOKU_INC.$url; + $size = @filesize($local); + if($size && $size < $conf['cssdatauri']){ + $data = base64_encode(file_get_contents($local)); + } + if($data){ + $url = 'data:image/'.$ext.';base64,'.$data; + }else{ + $url = $base.$url; + } + return $pre.$url; +} + + +/** + * Returns a list of possible Plugin Styles (no existance check here) + * + * @author Andreas Gohr <andi@splitbrain.org> + */ +function css_pluginstyles($mediatype='screen'){ + global $lang; + $list = array(); + $plugins = plugin_list(); + foreach ($plugins as $p){ + $list[DOKU_PLUGIN."$p/$mediatype.css"] = DOKU_BASE."lib/plugins/$p/"; + // alternative for screen.css + if ($mediatype=='screen') { + $list[DOKU_PLUGIN."$p/style.css"] = DOKU_BASE."lib/plugins/$p/"; + } + if($lang['direction'] == 'rtl'){ + $list[DOKU_PLUGIN."$p/rtl.css"] = DOKU_BASE."lib/plugins/$p/"; + } + } + return $list; +} + +/** + * Move all @import statements in a combined stylesheet to the top so they + * aren't ignored by the browser. + * + * @author Gabriel Birke <birke@d-scribe.de> + */ +function css_moveimports($css) +{ + if(!preg_match_all('/@import\s+(?:url\([^)]+\)|"[^"]+")\s*[^;]*;\s*/', $css, $matches, PREG_OFFSET_CAPTURE)) { + return $css; + } + $newCss = ""; + $imports = ""; + $offset = 0; + foreach($matches[0] as $match) { + $newCss .= substr($css, $offset, $match[1] - $offset); + $imports .= $match[0]; + $offset = $match[1] + strlen($match[0]); + } + $newCss .= substr($css, $offset); + return $imports.$newCss; +} + +/** + * Very simple CSS optimizer + * + * @author Andreas Gohr <andi@splitbrain.org> + */ +function css_compress($css){ + //strip comments through a callback + $css = preg_replace_callback('#(/\*)(.*?)(\*/)#s','css_comment_cb',$css); + + //strip (incorrect but common) one line comments + $css = preg_replace('/(?<!:)\/\/.*$/m','',$css); + + // strip whitespaces + $css = preg_replace('![\r\n\t ]+!',' ',$css); + $css = preg_replace('/ ?([;,{}\/]) ?/','\\1',$css); + $css = preg_replace('/ ?: /',':',$css); + + // shorten colors + $css = preg_replace("/#([0-9a-fA-F]{1})\\1([0-9a-fA-F]{1})\\2([0-9a-fA-F]{1})\\3/", "#\\1\\2\\3",$css); + + return $css; +} + +/** + * Callback for css_compress() + * + * Keeps short comments (< 5 chars) to maintain typical browser hacks + * + * @author Andreas Gohr <andi@splitbrain.org> + */ +function css_comment_cb($matches){ + if(strlen($matches[2]) > 4) return ''; + return $matches[0]; +} + +//Setup VIM: ex: et ts=4 : |