xref: /dokuwiki/lib/exe/css.php (revision bf1ec6525db0b131d051d4e0023afb87e36f584b) 
1<?php
2/**
3 * DokuWiki StyleSheet creator
4 *
5 * @license    GPL 2 (http://www.gnu.org/licenses/gpl.html)
6 * @author     Andreas Gohr <andi@splitbrain.org>
7 */
8
9if(!defined('DOKU_INC')) define('DOKU_INC',dirname(__FILE__).'/../../');
10if(!defined('NOSESSION')) define('NOSESSION',true); // we do not use a session or authentication here (better caching)
11if(!defined('DOKU_DISABLE_GZIP_OUTPUT')) define('DOKU_DISABLE_GZIP_OUTPUT',1); // we gzip ourself here
12require_once(DOKU_INC.'inc/init.php');
13
14// Main (don't run when UNIT test)
15if(!defined('SIMPLE_TEST')){
16    header('Content-Type: text/css; charset=utf-8');
17    css_out();
18}
19
20
21// ---------------------- functions ------------------------------
22
23/**
24 * Output all needed Styles
25 *
26 * @author Andreas Gohr <andi@splitbrain.org>
27 */
28function css_out(){
29    global $conf;
30    global $lang;
31    global $config_cascade;
32
33    $mediatype = 'screen';
34    if (isset($_REQUEST['s']) &&
35        in_array($_REQUEST['s'], array('all', 'print', 'feed'))) {
36        $mediatype = $_REQUEST['s'];
37    }
38
39    $tpl = trim(preg_replace('/[^\w-]+/','',$_REQUEST['t']));
40    if($tpl){
41        $tplinc = DOKU_INC.'lib/tpl/'.$tpl.'/';
42        $tpldir = DOKU_BASE.'lib/tpl/'.$tpl.'/';
43    }else{
44        $tplinc = DOKU_TPLINC;
45        $tpldir = DOKU_TPL;
46    }
47
48    // The generated script depends on some dynamic options
49    $cache = new cache('styles'.$_SERVER['HTTP_HOST'].$_SERVER['SERVER_PORT'].DOKU_BASE.$tplinc.$mediatype,'.css');
50
51    // load template styles
52    $tplstyles = array();
53    if(@file_exists($tplinc.'style.ini')){
54        $ini = parse_ini_file($tplinc.'style.ini',true);
55        foreach($ini['stylesheets'] as $file => $mode){
56            $tplstyles[$mode][$tplinc.$file] = $tpldir;
57        }
58    }
59
60    // Array of needed files and their web locations, the latter ones
61    // are needed to fix relative paths in the stylesheets
62    $files   = array();
63    // load core styles
64    $files[DOKU_INC.'lib/styles/'.$mediatype.'.css'] = DOKU_BASE.'lib/styles/';
65    // load jQuery-UI theme
66    $files[DOKU_INC.'lib/scripts/jquery/jquery-ui-theme/smoothness.css'] = DOKU_BASE.'lib/scripts/jquery/jquery-ui-theme/';
67    // load plugin styles
68    $files = array_merge($files, css_pluginstyles($mediatype));
69    // load template styles
70    if (isset($tplstyles[$mediatype])) {
71        $files = array_merge($files, $tplstyles[$mediatype]);
72    }
73    // if old 'default' userstyle setting exists, make it 'screen' userstyle for backwards compatibility
74    if (isset($config_cascade['userstyle']['default'])) {
75        $config_cascade['userstyle']['screen'] = $config_cascade['userstyle']['default'];
76    }
77    // load user styles
78    if(isset($config_cascade['userstyle'][$mediatype])){
79        $files[$config_cascade['userstyle'][$mediatype]] = DOKU_BASE;
80    }
81    // load rtl styles
82    // @todo: this currently adds the rtl styles only to the 'screen' media type
83    //        but 'print' and 'all' should also be supported
84    if ($mediatype=='screen') {
85        if($lang['direction'] == 'rtl'){
86            if (isset($tplstyles['rtl'])) $files = array_merge($files, $tplstyles['rtl']);
87        }
88    }
89
90    $cache_files = array_merge(array_keys($files), getConfigFiles('main'));
91    $cache_files[] = $tplinc.'style.ini';
92    $cache_files[] = __FILE__;
93
94    // check cache age & handle conditional request
95    // This may exit if a cache can be used
96    http_cached($cache->cache,
97                $cache->useCache(array('files' => $cache_files)));
98
99    // start output buffering and build the stylesheet
100    ob_start();
101
102    // print the default classes for interwiki links and file downloads
103    css_interwiki();
104    css_filetypes();
105
106    // load files
107    foreach($files as $file => $location){
108        print css_loadfile($file, $location);
109    }
110
111    // end output buffering and get contents
112    $css = ob_get_contents();
113    ob_end_clean();
114
115    // apply style replacements
116    $css = css_applystyle($css,$tplinc);
117
118    // place all @import statements at the top of the file
119    $css = css_moveimports($css);
120
121    // compress whitespace and comments
122    if($conf['compress']){
123        $css = css_compress($css);
124    }
125
126    http_cached_finish($cache->cache, $css);
127}
128
129/**
130 * Does placeholder replacements in the style according to
131 * the ones defined in a templates style.ini file
132 *
133 * @author Andreas Gohr <andi@splitbrain.org>
134 */
135function css_applystyle($css,$tplinc){
136    if(@file_exists($tplinc.'style.ini')){
137        $ini = parse_ini_file($tplinc.'style.ini',true);
138        $css = strtr($css,$ini['replacements']);
139    }
140    return $css;
141}
142
143/**
144 * Prints classes for interwikilinks
145 *
146 * Interwiki links have two classes: 'interwiki' and 'iw_$name>' where
147 * $name is the identifier given in the config. All Interwiki links get
148 * an default style with a default icon. If a special icon is available
149 * for an interwiki URL it is set in it's own class. Both classes can be
150 * overwritten in the template or userstyles.
151 *
152 * @author Andreas Gohr <andi@splitbrain.org>
153 */
154function css_interwiki(){
155
156    // default style
157    echo 'a.interwiki {';
158    echo ' background: transparent url('.DOKU_BASE.'lib/images/interwiki.png) 0px 1px no-repeat;';
159    echo ' padding: 1px 0px 1px 16px;';
160    echo '}';
161
162    // additional styles when icon available
163    $iwlinks = getInterwiki();
164    foreach(array_keys($iwlinks) as $iw){
165        $class = preg_replace('/[^_\-a-z0-9]+/i','_',$iw);
166        if(@file_exists(DOKU_INC.'lib/images/interwiki/'.$iw.'.png')){
167            echo "a.iw_$class {";
168            echo '  background-image: url('.DOKU_BASE.'lib/images/interwiki/'.$iw.'.png)';
169            echo '}';
170        }elseif(@file_exists(DOKU_INC.'lib/images/interwiki/'.$iw.'.gif')){
171            echo "a.iw_$class {";
172            echo '  background-image: url('.DOKU_BASE.'lib/images/interwiki/'.$iw.'.gif)';
173            echo '}';
174        }
175    }
176}
177
178/**
179 * Prints classes for file download links
180 *
181 * @author Andreas Gohr <andi@splitbrain.org>
182 */
183function css_filetypes(){
184
185    // default style
186    echo 'a.mediafile {';
187    echo ' background: transparent url('.DOKU_BASE.'lib/images/fileicons/file.png) 0px 1px no-repeat;';
188    echo ' padding-left: 18px;';
189    echo ' padding-bottom: 1px;';
190    echo '}';
191
192    // additional styles when icon available
193    // scan directory for all icons
194    $exts = array();
195    if($dh = opendir(DOKU_INC.'lib/images/fileicons')){
196        while(false !== ($file = readdir($dh))){
197            if(preg_match('/([_\-a-z0-9]+(?:\.[_\-a-z0-9]+)*?)\.(png|gif)/i',$file,$match)){
198                $ext = strtolower($match[1]);
199                $type = '.'.strtolower($match[2]);
200                if($ext!='file' && (!isset($exts[$ext]) || $type=='.png')){
201                    $exts[$ext] = $type;
202                }
203            }
204        }
205        closedir($dh);
206    }
207    foreach($exts as $ext=>$type){
208        $class = preg_replace('/[^_\-a-z0-9]+/','_',$ext);
209        echo "a.mf_$class {";
210        echo '  background-image: url('.DOKU_BASE.'lib/images/fileicons/'.$ext.$type.')';
211        echo '}';
212    }
213}
214
215/**
216 * Loads a given file and fixes relative URLs with the
217 * given location prefix
218 */
219function css_loadfile($file,$location=''){
220    if(!@file_exists($file)) return '';
221    $css = io_readFile($file);
222    if(!$location) return $css;
223
224    $css = preg_replace('#(url\([ \'"]*)(?!/|http://|https://| |\'|")#','\\1'.$location,$css);
225    $css = preg_replace('#(@import\s+[\'"])(?!/|http://|https://)#', '\\1'.$location, $css);
226    return $css;
227}
228
229
230/**
231 * Returns a list of possible Plugin Styles (no existance check here)
232 *
233 * @author Andreas Gohr <andi@splitbrain.org>
234 */
235function css_pluginstyles($mediatype='screen'){
236    global $lang;
237    $list = array();
238    $plugins = plugin_list();
239    foreach ($plugins as $p){
240        $list[DOKU_PLUGIN."$p/$mediatype.css"]  = DOKU_BASE."lib/plugins/$p/";
241        // alternative for screen.css
242        if ($mediatype=='screen') {
243            $list[DOKU_PLUGIN."$p/style.css"]  = DOKU_BASE."lib/plugins/$p/";
244        }
245        if($lang['direction'] == 'rtl'){
246            $list[DOKU_PLUGIN."$p/rtl.css"] = DOKU_BASE."lib/plugins/$p/";
247        }
248    }
249    return $list;
250}
251
252/**
253 * Move all @import statements in a combined stylesheet to the top so they
254 * aren't ignored by the browser.
255 *
256 * @author Gabriel Birke <birke@d-scribe.de>
257 */
258function css_moveimports($css)
259{
260    if(!preg_match_all('/@import\s+(?:url\([^)]+\)|"[^"]+")\s*[^;]*;\s*/', $css, $matches, PREG_OFFSET_CAPTURE)) {
261        return $css;
262    }
263    $newCss  = "";
264    $imports = "";
265    $offset  = 0;
266    foreach($matches[0] as $match) {
267        $newCss  .= substr($css, $offset, $match[1] - $offset);
268        $imports .= $match[0];
269        $offset   = $match[1] + strlen($match[0]);
270    }
271    $newCss .= substr($css, $offset);
272    return $imports.$newCss;
273}
274
275/**
276 * Very simple CSS optimizer
277 *
278 * @author Andreas Gohr <andi@splitbrain.org>
279 */
280function css_compress($css){
281    //strip comments through a callback
282    $css = preg_replace_callback('#(/\*)(.*?)(\*/)#s','css_comment_cb',$css);
283
284    //strip (incorrect but common) one line comments
285    $css = preg_replace('/(?<!:)\/\/.*$/m','',$css);
286
287    // strip whitespaces
288    $css = preg_replace('![\r\n\t ]+!',' ',$css);
289    $css = preg_replace('/ ?([:;,{}\/]) ?/','\\1',$css);
290
291    // shorten colors
292    $css = preg_replace("/#([0-9a-fA-F]{1})\\1([0-9a-fA-F]{1})\\2([0-9a-fA-F]{1})\\3/", "#\\1\\2\\3",$css);
293
294    return $css;
295}
296
297/**
298 * Callback for css_compress()
299 *
300 * Keeps short comments (< 5 chars) to maintain typical browser hacks
301 *
302 * @author Andreas Gohr <andi@splitbrain.org>
303 */
304function css_comment_cb($matches){
305    if(strlen($matches[2]) > 4) return '';
306    return $matches[0];
307}
308
309//Setup VIM: ex: et ts=4 :
310