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__).'/../../../../').'/');
10require_once(DOKU_INC.'inc/init.php');
11
12// ---------------------- functions ------------------------------
13
14/**
15 * Output all needed Styles
16 *
17 * @author Andreas Gohr <andi@splitbrain.org>
18 */
19function css_ckg_out($path, $tpl = "")
20{
21    global $conf;
22    global $lang;
23    global $config_cascade;
24	global $INPUT;
25	$copy = $INPUT->str('ckg_save_ss',FALSE);
26    chdir($path);
27
28    $mediatypes = array('screen', 'all');
29    $type = '';
30
31    if(!$tpl) {
32        $tpl = $conf['template'];
33
34		if($copy) {
35		    $copy_path = DOKU_PLUGIN . 'ckgedit/ckeditor/css/_style.css';
36			 msg($copy_path,1);
37        }
38	}
39
40    // load styl.ini
41    $styleini = css_ckg_styleini($tpl);
42
43    // if old 'default' userstyle setting exists, make it 'screen' userstyle for backwards compatibility
44    if (isset($config_cascade['userstyle']['default'])) {
45        $config_cascade['userstyle']['screen'] = $config_cascade['userstyle']['default'];
46    }
47
48    // Array of needed files and their web locations, the latter ones
49    // are needed to fix relative paths in the stylesheets
50    $files = array();
51    foreach($mediatypes as $mediatype) {
52        $files[$mediatype] = array();
53        // load core styles
54        $files[$mediatype][DOKU_INC.'lib/styles/'.$mediatype.'.css'] = DOKU_BASE.'lib/styles/';
55
56        // load template styles
57        if (isset($styleini['stylesheets'][$mediatype])) {
58            $files[$mediatype] = array_merge($files[$mediatype], $styleini['stylesheets'][$mediatype]);
59        }
60        // load user styles
61        if(!empty($config_cascade['userstyle'][$mediatype])) {
62            foreach($config_cascade['userstyle'][$mediatype] as $userstyle) {
63                $files[$mediatype][$userstyle] = DOKU_BASE;
64            }
65        }
66    }
67
68    $css="";
69
70    // build the stylesheet
71    foreach ($mediatypes as $mediatype) {
72
73        // print the default classes for interwiki links and file downloads
74        if ($mediatype == 'screen') {
75            $css .= '@media screen {';
76            css_ckg_interwiki($css);
77            css_ckg_filetypes($css);
78            $css .= '}';
79        }
80
81        $xcl =  'plugins|popup|fileuploader|toc|search|recent|diff|edit|form|admin|manager|media|modal';
82
83        // load files
84        $css_ckg_content = '';
85        foreach($files[$mediatype] as $file => $location) {
86           if(preg_match('#' .$xcl . '#',$file)  ) {
87                   continue;
88		    }
89            $display = str_replace(fullpath(DOKU_INC), '', fullpath($file));
90            $css_ckg_content .= "\n/* XXXXXXXXX $display XXXXXXXXX */\n";
91            $css_ckg_content .= css_ckg_loadfile($file, $location);
92        }
93        switch ($mediatype) {
94            case 'screen':
95                $css .=  NL.'@media screen { /* START screen styles */'.NL.$css_ckg_content.NL.'} /* /@media END screen styles */'.NL;
96                break;
97            case 'all':
98            default:
99                $css .= NL.'/* START rest styles */ '.NL.$css_ckg_content.NL.'/* END rest styles */'.NL;
100                break;
101        }
102    }
103
104    // apply style replacements
105    $css = css_ckg_applystyle($css, $styleini['replacements']);
106    // parse less
107    $css = css_ckg_parseless($css);
108
109    // embed small images right into the stylesheet
110    if($conf['cssdatauri']){
111        $base = preg_quote(DOKU_BASE,'#');
112        $css = preg_replace_callback('#(url\([ \'"]*)('.$base.')(.*?(?:\.(png|gif)))#i','css_ckg_datauri',$css);
113    }
114
115   $css = preg_replace("/(\#?|\.?|div\.)dokuwiki\.?/", '', $css);
116
117   $css = "@import 'additional.css';\n/* template: $tpl */\n@media screen {\n.$tpl{color:#ccc;}\n}\n" . $css;
118   $css .=  '
119   span.multi_p_open {
120    display: block;
121   }
122   body,html {
123    background-color: #fff;
124    background-image:none;
125  }
126  blockquote {
127   padding-left: .5em;
128   margin-left: 1.5em;
129  }
130' . "\n";
131
132  if( io_saveFile($path . 'Styles/_style.css' ,$css)) {
133	  if(isset($copy_path)) {		 ;
134	     $retv = io_saveFile($copy_path,$css);
135		 if(!$retv) msg("failed: " . $copy_path);
136	  }
137	  return 0;
138  }
139  else {
140	  return 1;
141  }
142}
143
144/**
145 * Uses phpless to parse LESS in our CSS
146 *
147 * most of this function is error handling to show a nice useful error when
148 * LESS compilation fails
149 *
150 * @param $css
151 * @return string
152 */
153function css_ckg_parseless($css) {
154    $less = new lessc();
155    $less->importDir[] = DOKU_INC;
156
157    try {
158        return $less->compile($css);
159    } catch(Exception $e) {
160            // get exception message
161        $msg = str_replace(array("\n", "\r", "'"), array(), $e->getMessage());
162
163        // try to use line number to find affected file
164        if(preg_match('/line: (\d+)$/', $msg, $m)){
165            $msg = substr($msg, 0, -1* strlen($m[0])); //remove useless linenumber
166            $lno = $m[1];
167
168            // walk upwards to last include
169            $lines = explode("\n", $css);
170            for($i=$lno-1; $i>=0; $i--){
171                if(preg_match('/\/(\* XXXXXXXXX )(.*?)( XXXXXXXXX \*)\//', $lines[$i], $m)){
172                    // we found it, add info to message
173                    $msg .= ' in '.$m[2].' at line '.($lno-$i);
174                    break;
175                }
176            }
177        }
178
179        // something went wrong
180        $error = 'A fatal error occured during compilation of the CSS files. '.
181            'If you recently installed a new plugin or template it '.
182            'might be broken and you should try disabling it again. ['.$msg.']';
183
184         msg($error);
185
186        exit;
187    }
188}
189
190/**
191 * Does placeholder replacements in the style according to
192 * the ones defined in a templates style.ini file
193 *
194 * This also adds the ini defined placeholders as less variables
195 * (sans the surrounding __ and with a ini_ prefix)
196 *
197 * @author Andreas Gohr <andi@splitbrain.org>
198 */
199function css_ckg_applystyle($css, $replacements) {
200    // we convert ini replacements to LESS variable names
201    // and build a list of variable: value; pairs
202    $less = '';
203    foreach((array) $replacements as $key => $value) {
204        $lkey = trim($key, '_');
205        $lkey = '@ini_'.$lkey;
206        $less .= "$lkey: $value;\n";
207
208        $replacements[$key] = $lkey;
209    }
210
211    // we now replace all old ini replacements with LESS variables
212    $css = strtr($css, $replacements);
213
214    // now prepend the list of LESS variables as the very first thing
215    $css = $less.$css;
216    return $css;
217}
218
219/**
220 * Load style ini contents
221 *
222 * Loads and merges style.ini files from template and config and prepares
223 * the stylesheet modes
224 *
225 * @author Andreas Gohr <andi@splitbrain.org>
226 * @param string $tpl the used template
227 * @return array with keys 'stylesheets' and 'replacements'
228 */
229function css_ckg_styleini($tpl) {
230    $stylesheets = array(); // mode, file => base
231    $replacements = array(); // placeholder => value
232
233    // load template's style.ini
234    $incbase = tpl_incdir($tpl);
235    $webbase = tpl_basedir($tpl);
236    $ini = $incbase.'style.ini';
237    if(file_exists($ini)){
238        $data = parse_ini_file($ini, true);
239
240        // stylesheets
241        if(is_array($data['stylesheets'])) foreach($data['stylesheets'] as $file => $mode){
242            $stylesheets[$mode][$incbase.$file] = $webbase;
243        }
244
245        // replacements
246        if(is_array($data['replacements'])){
247            $replacements = array_merge($replacements, css_ckg_fixreplacementurls($data['replacements'],$webbase));
248        }
249    }
250
251    // load configs's style.ini
252    $webbase = DOKU_BASE;
253    $ini = DOKU_CONF."tpl/$tpl/style.ini";
254    $incbase = dirname($ini).'/';
255    if(file_exists($ini)){
256        $data = parse_ini_file($ini, true);
257
258        // stylesheets
259        if(isset($data['stylesheets']) && is_array($data['stylesheets'])) foreach($data['stylesheets'] as $file => $mode){
260            $stylesheets[$mode][$incbase.$file] = $webbase;
261        }
262
263        // replacements
264        if(isset($data['replacements']) && is_array($data['replacements'])){
265            $replacements = array_merge($replacements, css_ckg_fixreplacementurls($data['replacements'],$webbase));
266        }
267    }
268
269    return array(
270        'stylesheets' => $stylesheets,
271        'replacements' => $replacements
272    );
273}
274
275/**
276 * Amend paths used in replacement relative urls, refer FS#2879
277 *
278 * @author Chris Smith <chris@jalakai.co.uk>
279 */
280function css_ckg_fixreplacementurls($replacements, $location) {
281    foreach($replacements as $key => $value) {
282        $replacements[$key] = preg_replace('#(url\([ \'"]*)(?!/|data:|http://|https://| |\'|")#','\\1'.$location,$value);
283    }
284    return $replacements;
285}
286
287/**
288 * Prints classes for interwikilinks
289 *
290 * Interwiki links have two classes: 'interwiki' and 'iw_$name>' where
291 * $name is the identifier given in the config. All Interwiki links get
292 * an default style with a default icon. If a special icon is available
293 * for an interwiki URL it is set in it's own class. Both classes can be
294 * overwritten in the template or userstyles.
295 *
296 * @author Andreas Gohr <andi@splitbrain.org>
297 */
298function css_ckg_interwiki(&$css){
299
300    // default style
301    $css .= 'a.interwiki {';
302    $css .= ' background: transparent url('.DOKU_BASE.'lib/images/interwiki.png) 0px 1px no-repeat;';
303    $css .= ' padding: 1px 0px 1px 16px;';
304    $css .= '}';
305
306    // additional styles when icon available
307    $iwlinks = getInterwiki();
308    foreach(array_keys($iwlinks) as $iw){
309        $class = preg_replace('/[^_\-a-z0-9]+/i','_',$iw);
310        if(@file_exists(DOKU_INC.'lib/images/interwiki/'.$iw.'.png')){
311            $css .= "a.iw_$class {";
312            $css .= '  background-image: url('.DOKU_BASE.'lib/images/interwiki/'.$iw.'.png)';
313            $css .= '}';
314        }elseif(@file_exists(DOKU_INC.'lib/images/interwiki/'.$iw.'.gif')){
315            $css .= "a.iw_$class {";
316            $css .= '  background-image: url('.DOKU_BASE.'lib/images/interwiki/'.$iw.'.gif)';
317            $css .= '}';
318        }
319    }
320}
321
322/**
323 * Prints classes for file download links
324 *
325 * @author Andreas Gohr <andi@splitbrain.org>
326 */
327function css_ckg_filetypes(&$css){
328
329    // default style
330    $css .= '.mediafile {';
331    $css .= ' background: transparent url('.DOKU_BASE.'lib/images/fileicons/file.png) 0px 1px no-repeat;';
332    $css .= ' padding-left: 18px;';
333    $css .= ' padding-bottom: 1px;';
334    $css .= '}';
335
336    // additional styles when icon available
337    // scan directory for all icons
338    $exts = array();
339    if($dh = opendir(DOKU_INC.'lib/images/fileicons')){
340        while(false !== ($file = readdir($dh))){
341            if(preg_match('/([_\-a-z0-9]+(?:\.[_\-a-z0-9]+)*?)\.(png|gif)/i',$file,$match)){
342                $ext = strtolower($match[1]);
343                $type = '.'.strtolower($match[2]);
344                if($ext!='file' && (!isset($exts[$ext]) || $type=='.png')){
345                    $exts[$ext] = $type;
346                }
347            }
348        }
349        closedir($dh);
350    }
351    foreach($exts as $ext=>$type){
352        $class = preg_replace('/[^_\-a-z0-9]+/','_',$ext);
353        $css .= ".mf_$class {";
354        $css .= '  background-image: url('.DOKU_BASE.'lib/images/fileicons/'.$ext.$type.')';
355        $css .= '}';
356    }
357}
358
359/**
360 * Loads a given file and fixes relative URLs with the
361 * given location prefix
362 */
363function css_ckg_loadfile($file,$location=''){
364    $css_ckg_file = new DokuCssFile($file);
365    return $css_ckg_file->load($location);
366}
367
368/**
369 *  Helper class to abstract loading of css/less files
370 *
371 *  @author Chris Smith <chris@jalakai.co.uk>
372 */
373class DokuCssFile {
374
375    protected $filepath;             // file system path to the CSS/Less file
376    protected $location;             // base url location of the CSS/Less file
377    private   $relative_path = null;
378
379    public function __construct($file) {
380        $this->filepath = $file;
381    }
382
383    /**
384     * Load the contents of the css/less file and adjust any relative paths/urls (relative to this file) to be
385     * relative to the dokuwiki root: the web root (DOKU_BASE) for most files; the file system root (DOKU_INC)
386     * for less files.
387     *
388     * @param   string   $location   base url for this file
389     * @return  string               the CSS/Less contents of the file
390     */
391    public function load($location='') {
392        if (!file_exists($this->filepath)) return '';
393
394        $css = io_readFile($this->filepath);
395        if (!$location) return $css;
396
397        $this->location = $location;
398
399        $css = preg_replace_callback('#(url\( *)([\'"]?)(.*?)(\2)( *\))#',array($this,'replacements'),$css);
400        $css = preg_replace_callback('#(@import\s+)([\'"])(.*?)(\2)#',array($this,'replacements'),$css);
401
402        return $css;
403    }
404
405    /**
406     * Get the relative file system path of this file, relative to dokuwiki's root folder, DOKU_INC
407     *
408     * @return string   relative file system path
409     */
410    private function getRelativePath(){
411
412        if (is_null($this->relative_path)) {
413            $basedir = array(DOKU_INC);
414
415            $basedir = array_map('preg_quote_cb', $basedir);
416            $regex = '/^('.join('|',$basedir).')/';
417            $this->relative_path = preg_replace($regex, '', dirname($this->filepath));
418        }
419
420        return $this->relative_path;
421    }
422
423    /**
424     * preg_replace callback to adjust relative urls from relative to this file to relative
425     * to the appropriate dokuwiki root location as described in the code
426     *
427     * @param  array    see http://php.net/preg_replace_callback
428     * @return string   see http://php.net/preg_replace_callback
429     */
430    public function replacements($match) {
431
432        // not a relative url? - no adjustment required
433        if (preg_match('#^(/|data:|https?://)#',$match[3])) {
434            return $match[0];
435        }
436        // a less file import? - requires a file system location
437        else if (substr($match[3],-5) == '.less') {
438            if ($match[3][0] != '/') {
439                $match[3] = $this->getRelativePath() . '/' . $match[3];
440            }
441        }
442        // everything else requires a url adjustment
443        else {
444            $match[3] = $this->location . $match[3];
445        }
446
447        return join('',array_slice($match,1));
448    }
449}
450
451/**
452 * Convert local image URLs to data URLs if the filesize is small
453 *
454 * Callback for preg_replace_callback
455 */
456function css_ckg_datauri($match){
457    global $conf;
458
459    $pre   = unslash($match[1]);
460    $base  = unslash($match[2]);
461    $url   = unslash($match[3]);
462    $ext   = unslash($match[4]);
463
464    $local = DOKU_INC.$url;
465    $size  = @filesize($local);
466    if($size && $size < $conf['cssdatauri']){
467        $data = base64_encode(file_get_contents($local));
468    }
469    if($data){
470        $url = 'data:image/'.$ext.';base64,'.$data;
471    }else{
472        $url = $base.$url;
473    }
474    return $pre.$url;
475}
476
477
478
479/**
480 * Very simple CSS optimizer
481 *
482 * @author Andreas Gohr <andi@splitbrain.org>
483 */
484function css_ckg_compress($css){
485    //strip comments through a callback
486    $css = preg_replace_callback('#(/\*)(.*?)(\*/)#s','css_ckg_comment_cb',$css);
487
488    //strip (incorrect but common) one line comments
489    $css = preg_replace('/(?<!:)\/\/.*$/m','',$css);
490
491    // strip whitespaces
492    $css = preg_replace('![\r\n\t ]+!',' ',$css);
493    $css = preg_replace('/ ?([;,{}\/]) ?/','\\1',$css);
494    $css = preg_replace('/ ?: /',':',$css);
495
496    // number compression
497    $css = preg_replace('/([: ])0+(\.\d+?)0*((?:pt|pc|in|mm|cm|em|ex|px)\b|%)(?=[^\{]*[;\}])/', '$1$2$3', $css); // "0.1em" to ".1em", "1.10em" to "1.1em"
498    $css = preg_replace('/([: ])\.(0)+((?:pt|pc|in|mm|cm|em|ex|px)\b|%)(?=[^\{]*[;\}])/', '$1$2', $css); // ".0em" to "0"
499    $css = preg_replace('/([: ]0)0*(\.0*)?((?:pt|pc|in|mm|cm|em|ex|px)(?=[^\{]*[;\}])\b|%)/', '$1', $css); // "0.0em" to "0"
500    $css = preg_replace('/([: ]\d+)(\.0*)((?:pt|pc|in|mm|cm|em|ex|px)(?=[^\{]*[;\}])\b|%)/', '$1$3', $css); // "1.0em" to "1em"
501    $css = preg_replace('/([: ])0+(\d+|\d*\.\d+)((?:pt|pc|in|mm|cm|em|ex|px)(?=[^\{]*[;\}])\b|%)/', '$1$2$3', $css); // "001em" to "1em"
502
503    // shorten attributes (1em 1em 1em 1em -> 1em)
504    $css = preg_replace('/(?<![\w\-])((?:margin|padding|border|border-(?:width|radius)):)([\w\.]+)( \2)+(?=[;\}]| !)/', '$1$2', $css); // "1em 1em 1em 1em" to "1em"
505    $css = preg_replace('/(?<![\w\-])((?:margin|padding|border|border-(?:width)):)([\w\.]+) ([\w\.]+) \2 \3(?=[;\}]| !)/', '$1$2 $3', $css); // "1em 2em 1em 2em" to "1em 2em"
506
507    // shorten colors
508    $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);
509
510    return $css;
511}
512
513/**
514 * Callback for css_ckg_compress()
515 *
516 * Keeps short comments (< 5 chars) to maintain typical browser hacks
517 *
518 * @author Andreas Gohr <andi@splitbrain.org>
519 */
520function css_ckg_comment_cb($matches){
521    if(strlen($matches[2]) > 4) return '';
522    return $matches[0];
523}
524
525