xref: /dokuwiki/lib/exe/css.php (revision 5fb14d63b6a7de75860bd8a94caa8d2f2fe8ee5e) 
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    $print = (bool) $_REQUEST['print'];   //print mode?
34
35    // The generated script depends on some dynamic options
36    $cache = getCacheName('styles'.$print,'.css');
37
38    // load template styles
39    $tplstyles = array();
40    if(@file_exists(DOKU_TPLINC.'style.ini')){
41        $ini = parse_ini_file(DOKU_TPLINC.'style.ini',true);
42        foreach($ini['stylesheets'] as $file => $mode){
43            $tplstyles[$mode][DOKU_TPLINC.$file] = DOKU_TPL;
44        }
45    }
46
47    // Array of needed files and their web locations, the latter ones
48    // are needed to fix relative paths in the stylesheets
49    $files   = array();
50    if($print){
51        $files[DOKU_TPLINC.'print.css'] = DOKU_TPL;
52        $files = array_merge($files, $tplstyles['print']);
53        // load plugin styles
54        $files = array_merge($files, css_pluginstyles('print'));
55        $files[DOKU_CONF.'userprint.css'] = '';
56    }else{
57        $files[DOKU_INC.'lib/styles/style.css'] = DOKU_BASE.'lib/styles/';
58        $files = array_merge($files, $tplstyles['screen']);
59        if($lang['direction'] == 'rtl'){
60            $files = array_merge($files, $tplstyles['rtl']);
61        }
62        // load plugin styles
63        $files = array_merge($files, css_pluginstyles('screen'));
64        $files[DOKU_CONF.'userstyle.css'] = '';
65    }
66
67    // check cache age
68    if(css_cacheok($cache,array_keys($files))){
69        readfile($cache);
70        return;
71    }
72
73    // start output buffering and build the stylesheet
74    ob_start();
75
76    // print the default classes for interwiki links and file downloads
77    css_interwiki();
78    css_filetypes();
79
80    // load files
81    foreach($files as $file => $location){
82        print css_loadfile($file, $location);
83    }
84
85    // end output buffering and get contents
86    $css = ob_get_contents();
87    ob_end_clean();
88
89    // apply style replacements
90    $css = css_applystyle($css);
91
92    // compress whitespace and comments
93    if($conf['compress']){
94        $css = css_compress($css);
95    }
96
97    // save cache file
98    io_saveFile($cache,$css);
99
100    // finally send output
101    print $css;
102}
103
104/**
105 * Checks if a CSS Cache file still is valid
106 *
107 * @author Andreas Gohr <andi@splitbrain.org>
108 */
109function css_cacheok($cache,$files){
110    $ctime = @filemtime($cache);
111    if(!$ctime) return false; //There is no cache
112
113    // some additional files to check
114    $files[] = DOKU_CONF.'dokuwiki.php';
115    $files[] = DOKU_CONF.'local.php';
116    $files[] = DOKU_TPLINC.'style.ini';
117    $files[] = __FILE__;
118
119    // now walk the files
120    foreach($files as $file){
121        if(@filemtime($file) > $ctime){
122            return false;
123        }
124    }
125    return true;
126}
127
128/**
129 * Does placeholder replacements in the style according to
130 * the ones defined in a templates style.ini file
131 *
132 * @author Andreas Gohr <andi@splitbrain.org>
133 */
134function css_applystyle($css){
135    if(@file_exists(DOKU_TPLINC.'style.ini')){
136        $ini = parse_ini_file(DOKU_TPLINC.'style.ini',true);
137        $css = strtr($css,$ini['replacements']);
138    }
139    return $css;
140}
141
142/**
143 * Prints classes for interwikilinks
144 *
145 * Interwiki links have two classes: 'interwiki' and 'iw_$name>' where
146 * $name is the identifier given in the config. All Interwiki links get
147 * an default style with a default icon. If a special icon is available
148 * for an interwiki URL it is set in it's own class. Both classes can be
149 * overwritten in the template or userstyles.
150 *
151 * @author Andreas Gohr <andi@splitbrain.org>
152 */
153function css_interwiki(){
154
155    // default style
156    echo 'a.interwiki {';
157    echo ' background: transparent url('.DOKU_BASE.'lib/images/interwiki.png) 0px 1px no-repeat;';
158    echo ' padding-left: 16px;';
159    echo '}';
160
161    // additional styles when icon available
162    $iwlinks = getInterwiki();
163    foreach(array_keys($iwlinks) as $iw){
164        $class = preg_replace('/[^_\-a-z0-9]+/i','_',$iw);
165        if(@file_exists(DOKU_INC.'lib/images/interwiki/'.$iw.'.png')){
166            echo "a.iw_$class {";
167            echo '  background-image: url('.DOKU_BASE.'lib/images/interwiki/'.$iw.'.png)';
168            echo '}';
169        }elseif(@file_exists(DOKU_INC.'lib/images/interwiki/'.$iw.'.gif')){
170            echo "a.iw_$class {";
171            echo '  background-image: url('.DOKU_BASE.'lib/images/interwiki/'.$iw.'.gif)';
172            echo '}';
173        }
174    }
175}
176
177/**
178 * Prints classes for file download links
179 *
180 * @author Andreas Gohr <andi@splitbrain.org>
181 */
182function css_filetypes(){
183
184    // default style
185    echo 'a.mediafile {';
186    echo ' background: transparent url('.DOKU_BASE.'lib/images/fileicons/file.png) 0px 1px no-repeat;';
187    echo ' padding-left: 16px;';
188    echo '}';
189
190    // additional styles when icon available
191    $mimes = getMimeTypes();
192    foreach(array_keys($mimes) as $mime){
193        $class = preg_replace('/[^_\-a-z0-9]+/i','_',$mime);
194        if(@file_exists(DOKU_INC.'lib/images/fileicons/'.$mime.'.png')){
195            echo "a.mf_$class {";
196            echo '  background-image: url('.DOKU_BASE.'lib/images/fileicons/'.$mime.'.png)';
197            echo '}';
198        }elseif(@file_exists(DOKU_INC.'lib/images/fileicons/'.$mime.'.gif')){
199            echo "a.mf_$class {";
200            echo '  background-image: url('.DOKU_BASE.'lib/images/fileicons/'.$mime.'.gif)';
201            echo '}';
202        }
203    }
204}
205
206/**
207 * Loads a given file and fixes relative URLs with the
208 * given location prefix
209 */
210function css_loadfile($file,$location=''){
211    if(!@file_exists($file)) return '';
212    $css = io_readFile($file);
213    if(!$location) return $css;
214
215    $css = preg_replace('!(url\( *)([^/])!','\\1'.$location.'\\2',$css);
216    return $css;
217}
218
219/**
220 * Returns a list of possible Plugin Styles (no existance check here)
221 *
222 * @author Andreas Gohr <andi@splitbrain.org>
223 */
224function css_pluginstyles($mode='screen'){
225    $list = array();
226    $plugins = plugin_list();
227    foreach ($plugins as $p){
228        if($mode == 'print'){
229            $list[DOKU_PLUGIN."$p/print.css"]  = DOKU_BASE."lib/plugins/$p/";
230        }else{
231            $list[DOKU_PLUGIN."$p/style.css"]  = DOKU_BASE."lib/plugins/$p/";
232            $list[DOKU_PLUGIN."$p/screen.css"] = DOKU_BASE."lib/plugins/$p/";
233        }
234    }
235    return $list;
236}
237
238/**
239 * Very simple CSS optimizer
240 *
241 * @author Andreas Gohr <andi@splitbrain.org>
242 */
243function css_compress($css){
244    // strip whitespaces
245    $css = preg_replace('![\r\n\t ]+!',' ',$css);
246    $css = preg_replace('/ ?([:;,{}\/]) ?/','\\1',$css);
247
248    //strip comments through a callback
249    $css = preg_replace_callback('#(/\*)(.*?)(\*/)#s','css_comment_cb',$css);
250
251    // shorten colors
252    $css = preg_replace("/#([0-9a-fA-F]{1})\\1([0-9a-fA-F]{1})\\2([0-9a-fA-F]{1})\\3/", "#\\1\\2\\3",$css);
253
254    return $css;
255}
256
257/**
258 * Callback for css_compress()
259 *
260 * Keeps short comments (< 5 chars) to maintain typical browser hacks
261 *
262 * @author Andreas Gohr <andi@splitbrain.org>
263 */
264function css_comment_cb($matches){
265    if(strlen($matches[2]) > 4) return '';
266    return $matches[0];
267}
268
269//Setup VIM: ex: et ts=4 enc=utf-8 :
270?>
271