xref: /dokuwiki/lib/exe/css.php (revision f8cc712e2ad522d0bd56b9ba3983cd42abf664ad) 
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',realpath(dirname(__FILE__).'/../../').'/');
10if(!defined('NOSESSION')) define('NOSESSION',true); // we do not use a session or authentication here (better caching)
11require_once(DOKU_INC.'inc/init.php');
12require_once(DOKU_INC.'inc/pageutils.php');
13require_once(DOKU_INC.'inc/io.php');
14require_once(DOKU_INC.'inc/confutils.php');
15
16// Main (don't run when UNIT test)
17if(!defined('SIMPLE_TEST')){
18    header('Content-Type: text/css; charset=utf-8');
19    css_out();
20}
21
22
23// ---------------------- functions ------------------------------
24
25/**
26 * Output all needed Styles
27 *
28 * @author Andreas Gohr <andi@splitbrain.org>
29 */
30function css_out(){
31    global $conf;
32    global $lang;
33    switch ($_REQUEST['s']) {
34        case 'print':
35        case 'feed':
36            $style = $_REQUEST['s'];
37        break;
38        default:
39            $style = '';
40        break;
41    }
42
43    // The generated script depends on some dynamic options
44    $cache = getCacheName('styles'.$conf['template'].$print,'.css');
45
46    // load template styles
47    $tplstyles = array();
48    if(@file_exists(DOKU_TPLINC.'style.ini')){
49        $ini = parse_ini_file(DOKU_TPLINC.'style.ini',true);
50        foreach($ini['stylesheets'] as $file => $mode){
51            $tplstyles[$mode][DOKU_TPLINC.$file] = DOKU_TPL;
52        }
53    }
54
55    // Array of needed files and their web locations, the latter ones
56    // are needed to fix relative paths in the stylesheets
57    $files   = array();
58    if (isset($tplstyles['all'])) $files = array_merge($files, $tplstyles['all']);
59    if(!empty($style)){
60        $files[DOKU_INC.'lib/styles/'.$style.'.css'] = DOKU_BASE.'lib/styles/';
61        // load plugin, template, user styles
62        $files = array_merge($files, css_pluginstyles($style));
63        if (isset($tplstyles[$style])) $files = array_merge($files, $tplstyles[$style]);
64        $files[DOKU_CONF.'user'.$style.'.css'] = '';
65    }else{
66        $files[DOKU_INC.'lib/styles/style.css'] = DOKU_BASE.'lib/styles/';
67        if($conf['spellchecker']){
68            $files[DOKU_INC.'lib/styles/spellcheck.css'] = DOKU_BASE.'lib/styles/';
69        }
70        // load plugin, template, user styles
71        $files = array_merge($files, css_pluginstyles('screen'));
72        if (isset($tplstyles['screen'])) $files = array_merge($files, $tplstyles['screen']);
73        if($lang['direction'] == 'rtl'){
74            if (isset($tplstyles['rtl'])) $files = array_merge($files, $tplstyles['rtl']);
75        }
76        $files[DOKU_CONF.'userstyle.css'] = '';
77    }
78
79    // check cache age & handle conditional request
80    header('Cache-Control: public, max-age=3600');
81    header('Pragma: public');
82    if(css_cacheok($cache,array_keys($files))){
83        http_conditionalRequest(filemtime($cache));
84        if($conf['allowdebug']) header("X-CacheUsed: $cache");
85        readfile($cache);
86        return;
87    } else {
88        http_conditionalRequest(time());
89    }
90
91    // start output buffering and build the stylesheet
92    ob_start();
93
94    // print the default classes for interwiki links and file downloads
95    css_interwiki();
96    css_filetypes();
97
98    // load files
99    foreach($files as $file => $location){
100        print css_loadfile($file, $location);
101    }
102
103    // end output buffering and get contents
104    $css = ob_get_contents();
105    ob_end_clean();
106
107    // apply style replacements
108    $css = css_applystyle($css);
109
110    // compress whitespace and comments
111    if($conf['compress']){
112        $css = css_compress($css);
113    }
114
115    // save cache file
116    io_saveFile($cache,$css);
117
118    // finally send output
119    print $css;
120}
121
122/**
123 * Checks if a CSS Cache file still is valid
124 *
125 * @author Andreas Gohr <andi@splitbrain.org>
126 */
127function css_cacheok($cache,$files){
128    if($_REQUEST['purge']) return false; //support purge request
129
130    $ctime = @filemtime($cache);
131    if(!$ctime) return false; //There is no cache
132
133    // some additional files to check
134    $files[] = DOKU_CONF.'dokuwiki.php';
135    $files[] = DOKU_CONF.'local.php';
136    $files[] = DOKU_TPLINC.'style.ini';
137    $files[] = __FILE__;
138
139    // now walk the files
140    foreach($files as $file){
141        if(@filemtime($file) > $ctime){
142            return false;
143        }
144    }
145    return true;
146}
147
148/**
149 * Does placeholder replacements in the style according to
150 * the ones defined in a templates style.ini file
151 *
152 * @author Andreas Gohr <andi@splitbrain.org>
153 */
154function css_applystyle($css){
155    if(@file_exists(DOKU_TPLINC.'style.ini')){
156        $ini = parse_ini_file(DOKU_TPLINC.'style.ini',true);
157        $css = strtr($css,$ini['replacements']);
158    }
159    return $css;
160}
161
162/**
163 * Prints classes for interwikilinks
164 *
165 * Interwiki links have two classes: 'interwiki' and 'iw_$name>' where
166 * $name is the identifier given in the config. All Interwiki links get
167 * an default style with a default icon. If a special icon is available
168 * for an interwiki URL it is set in it's own class. Both classes can be
169 * overwritten in the template or userstyles.
170 *
171 * @author Andreas Gohr <andi@splitbrain.org>
172 */
173function css_interwiki(){
174
175    // default style
176    echo 'a.interwiki {';
177    echo ' background: transparent url('.DOKU_BASE.'lib/images/interwiki.png) 0px 1px no-repeat;';
178    echo ' padding-left: 16px;';
179    echo '}';
180
181    // additional styles when icon available
182    $iwlinks = getInterwiki();
183    foreach(array_keys($iwlinks) as $iw){
184        $class = preg_replace('/[^_\-a-z0-9]+/i','_',$iw);
185        if(@file_exists(DOKU_INC.'lib/images/interwiki/'.$iw.'.png')){
186            echo "a.iw_$class {";
187            echo '  background-image: url('.DOKU_BASE.'lib/images/interwiki/'.$iw.'.png)';
188            echo '}';
189        }elseif(@file_exists(DOKU_INC.'lib/images/interwiki/'.$iw.'.gif')){
190            echo "a.iw_$class {";
191            echo '  background-image: url('.DOKU_BASE.'lib/images/interwiki/'.$iw.'.gif)';
192            echo '}';
193        }
194    }
195}
196
197/**
198 * Prints classes for file download links
199 *
200 * @author Andreas Gohr <andi@splitbrain.org>
201 */
202function css_filetypes(){
203
204    // default style
205    echo 'a.mediafile {';
206    echo ' background: transparent url('.DOKU_BASE.'lib/images/fileicons/file.png) 0px 1px no-repeat;';
207    echo ' padding-left: 18px;';
208    echo ' padding-bottom: 1px;';
209    echo '}';
210
211    // additional styles when icon available
212    $mimes = getMimeTypes();
213    foreach(array_keys($mimes) as $mime){
214        $class = preg_replace('/[^_\-a-z0-9]+/i','_',$mime);
215        if(@file_exists(DOKU_INC.'lib/images/fileicons/'.$mime.'.png')){
216            echo "a.mf_$class {";
217            echo '  background-image: url('.DOKU_BASE.'lib/images/fileicons/'.$mime.'.png)';
218            echo '}';
219        }elseif(@file_exists(DOKU_INC.'lib/images/fileicons/'.$mime.'.gif')){
220            echo "a.mf_$class {";
221            echo '  background-image: url('.DOKU_BASE.'lib/images/fileicons/'.$mime.'.gif)';
222            echo '}';
223        }
224    }
225}
226
227/**
228 * Loads a given file and fixes relative URLs with the
229 * given location prefix
230 */
231function css_loadfile($file,$location=''){
232    if(!@file_exists($file)) return '';
233    $css = io_readFile($file);
234    if(!$location) return $css;
235
236    $css = preg_replace('#(url\([ \'"]*)((?!/|http://|https://| |\'|"))#','\\1'.$location.'\\3',$css);
237    return $css;
238}
239
240
241/**
242 * Returns a list of possible Plugin Styles (no existance check here)
243 *
244 * @author Andreas Gohr <andi@splitbrain.org>
245 */
246function css_pluginstyles($mode='screen'){
247    $list = array();
248    $plugins = plugin_list();
249    foreach ($plugins as $p){
250        if($mode == 'print'){
251            $list[DOKU_PLUGIN."$p/print.css"]  = DOKU_BASE."lib/plugins/$p/";
252            $list[DOKU_PLUGIN."$p/all.css"]  = DOKU_BASE."lib/plugins/$p/";
253        }elseif($mode == 'feed'){
254            $list[DOKU_PLUGIN."$p/feed.css"]  = DOKU_BASE."lib/plugins/$p/";
255            $list[DOKU_PLUGIN."$p/all.css"]  = DOKU_BASE."lib/plugins/$p/";
256        }else{
257            $list[DOKU_PLUGIN."$p/style.css"]  = DOKU_BASE."lib/plugins/$p/";
258            $list[DOKU_PLUGIN."$p/screen.css"] = DOKU_BASE."lib/plugins/$p/";
259            $list[DOKU_PLUGIN."$p/all.css"]  = DOKU_BASE."lib/plugins/$p/";
260        }
261    }
262    return $list;
263}
264
265/**
266 * Very simple CSS optimizer
267 *
268 * @author Andreas Gohr <andi@splitbrain.org>
269 */
270function css_compress($css){
271    //strip comments through a callback
272    $css = preg_replace_callback('#(/\*)(.*?)(\*/)#s','css_comment_cb',$css);
273
274    //strip (incorrect but common) one line comments
275    $css = preg_replace('/(?<!:)\/\/.*$/m','',$css);
276
277    // strip whitespaces
278    $css = preg_replace('![\r\n\t ]+!',' ',$css);
279    $css = preg_replace('/ ?([:;,{}\/]) ?/','\\1',$css);
280
281    // shorten colors
282    $css = preg_replace("/#([0-9a-fA-F]{1})\\1([0-9a-fA-F]{1})\\2([0-9a-fA-F]{1})\\3/", "#\\1\\2\\3",$css);
283
284    return $css;
285}
286
287/**
288 * Callback for css_compress()
289 *
290 * Keeps short comments (< 5 chars) to maintain typical browser hacks
291 *
292 * @author Andreas Gohr <andi@splitbrain.org>
293 */
294function css_comment_cb($matches){
295    if(strlen($matches[2]) > 4) return '';
296    return $matches[0];
297}
298
299//Setup VIM: ex: et ts=4 enc=utf-8 :
300?>
301