xref: /dokuwiki/lib/exe/css.php (revision 78a6aeb15ad85c8be4a7e39307b7d9aa0512742c) 
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__).'/../../').'/');
10define('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');
14
15// Main (don't run when UNIT test)
16if(!defined('SIMPLE_TEST')){
17    header('Content-Type: text/css; charset=utf-8');
18    css_out();
19}
20
21
22// ---------------------- functions ------------------------------
23
24/**
25 * Output all needed Styles
26 *
27 * @author Andreas Gohr <andi@splitbrain.org>
28 */
29function css_out(){
30    global $conf;
31    global $lang;
32    $print = (bool) $_REQUEST['print'];   //print mode?
33
34    // The generated script depends on some dynamic options
35    $cache = getCacheName('styles'.$print,'.css');
36
37    // Array of needed files and their web locations, the latter ones
38    // are needed to fix relative paths in the stylesheets
39    $files   = array();
40    if($print){
41        $files[DOKU_TPLINC.'print.css'] = DOKU_TPL;
42        // load plugin styles
43        $files = array_merge($files, css_pluginstyles('print'));
44        $files[DOKU_CONF.'userprint.css'] = '';
45    }else{
46        $files[DOKU_INC.'lib/styles/style.css'] = DOKU_BASE.'lib/styles/';
47        //fixme spellchecker style
48        $files[DOKU_TPLINC.'layout.css'] = DOKU_TPL;
49        $files[DOKU_TPLINC.'design.css'] = DOKU_TPL;
50        if($lang['direction'] == 'rtl'){
51            $files[DOKU_TPLINC.'rtl.css'] = DOKU_TPL;
52        }
53        // load plugin styles
54        $files = array_merge($files, css_pluginstyles('screen'));
55        $files[DOKU_CONF.'userstyle.css'] = '';
56    }
57
58    // check cache age
59    if(css_cacheok($cache,array_keys($files))){
60        readfile($cache);
61        return;
62    }
63
64    // start output buffering and build the stylesheet
65    ob_start();
66
67    // load files
68    foreach($files as $file => $location){
69        print css_loadfile($file, $location);
70    }
71
72    // end output buffering and get contents
73    $css = ob_get_contents();
74    ob_end_clean();
75
76    // compress whitespace and comments
77    if($conf['compress']){
78        $css = css_compress($css);
79    }
80
81    // save cache file
82    io_saveFile($cache,$css);
83
84    // finally send output
85    print $css;
86}
87
88/**
89 * Checks if a CSS Cache file still is valid
90 *
91 * @author Andreas Gohr <andi@splitbrain.org>
92 */
93function css_cacheok($cache,$files){
94    $ctime = @filemtime($cache);
95    if(!$ctime) return false; //There is no cache
96
97    // some additional files to check
98    $files[] = DOKU_CONF.'dokuwiki.conf';
99    $files[] = DOKU_CONF.'local.conf';
100    $files[] = __FILE__;
101
102    // now walk the files
103    foreach($files as $file){
104        if(@filemtime($file) > $ctime){
105            return false;
106        }
107    }
108    return true;
109}
110
111/**
112 * Loads a given file and fixes relative URLs with the
113 * given location prefix
114 */
115function css_loadfile($file,$location=''){
116    if(!@file_exists($file)) return '';
117    $css = io_readFile($file);
118    if(!$location) return $css;
119
120    $css = preg_replace('!(url\( *)([^/])!','\\1'.$location.'\\2',$css);
121    return $css;
122}
123
124/**
125 * Returns a list of possible Plugin Styles (no existance check here)
126 *
127 * @author Andreas Gohr <andi@splitbrain.org>
128 */
129function css_pluginstyles($mode='screen'){
130    $list = array();
131    $plugins = plugin_list();
132    foreach ($plugins as $p){
133        if($mode == 'print'){
134            $list[DOKU_PLUGIN."$p/print.css"]  = DOKU_BASE."lib/plugins/$p/";
135        }else{
136            $list[DOKU_PLUGIN."$p/style.css"]  = DOKU_BASE."lib/plugins/$p/";
137            $list[DOKU_PLUGIN."$p/screen.css"] = DOKU_BASE."lib/plugins/$p/";
138        }
139    }
140    return $list;
141}
142
143/**
144 * Very simple CSS optimizer
145 *
146 * @author Andreas Gohr <andi@splitbrain.org>
147 */
148function css_compress($css){
149    // strip whitespaces
150    $css = preg_replace('![\r\n\t ]+!',' ',$css);
151    $css = preg_replace('/ ?([:;,{}]) ?/','\\1',$css);
152
153    // strip comments (ungreedy)
154    // We keep very small comments to maintain typical browser hacks
155    $css = preg_replace('!(/\*)(.{4,})(\*/)!U','',$css);
156
157    // shorten colors
158    $css = preg_replace("/#([0-9a-fA-F]{1})\\1([0-9a-fA-F]{1})\\2([0-9a-fA-F]{1})\\3/", "#\\1\\2\\3",$css);
159
160    return $css;
161}
162
163
164//Setup VIM: ex: et ts=4 enc=utf-8 :
165?>
166