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 12if(!defined('NL')) define('NL',"\n"); 13require_once(DOKU_INC.'inc/init.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 global $config_cascade; 33 global $INPUT; 34 35 if ($INPUT->str('s') == 'feed') { 36 $mediatypes = array('feed'); 37 $type = 'feed'; 38 } else { 39 $mediatypes = array('screen', 'all', 'print', 'speech'); 40 $type = ''; 41 } 42 43 // decide from where to get the template 44 $tpl = trim(preg_replace('/[^\w-]+/','',$INPUT->str('t'))); 45 if(!$tpl) $tpl = $conf['template']; 46 47 // load style.ini 48 $styleini = css_styleini($tpl, $INPUT->bool('preview')); 49 50 // cache influencers 51 $tplinc = tpl_incdir($tpl); 52 $cache_files = getConfigFiles('main'); 53 $cache_files[] = $tplinc.'style.ini'; 54 $cache_files[] = DOKU_CONF."tpl/$tpl/style.ini"; 55 $cache_files[] = __FILE__; 56 if($INPUT->bool('preview')) $cache_files[] = $conf['cachedir'].'/preview.ini'; 57 58 // Array of needed files and their web locations, the latter ones 59 // are needed to fix relative paths in the stylesheets 60 $media_files = array(); 61 foreach($mediatypes as $mediatype) { 62 $files = array(); 63 64 // load core styles 65 $files[DOKU_INC.'lib/styles/'.$mediatype.'.css'] = DOKU_BASE.'lib/styles/'; 66 67 // load jQuery-UI theme 68 if ($mediatype == 'screen') { 69 $files[DOKU_INC.'lib/scripts/jquery/jquery-ui-theme/smoothness.css'] = DOKU_BASE.'lib/scripts/jquery/jquery-ui-theme/'; 70 } 71 // load plugin styles 72 $files = array_merge($files, css_pluginstyles($mediatype)); 73 // load template styles 74 if (isset($styleini['stylesheets'][$mediatype])) { 75 $files = array_merge($files, $styleini['stylesheets'][$mediatype]); 76 } 77 // load user styles 78 if(!empty($config_cascade['userstyle'][$mediatype])) { 79 foreach($config_cascade['userstyle'][$mediatype] as $userstyle) { 80 $files[$userstyle] = DOKU_BASE; 81 } 82 } 83 84 // Let plugins decide to either put more styles here or to remove some 85 $media_files[$mediatype] = css_filewrapper($mediatype, $files); 86 $CSSEvt = new Doku_Event('CSS_STYLES_INCLUDED', $media_files[$mediatype]); 87 88 // Make it preventable. 89 if ( $CSSEvt->advise_before() ) { 90 $cache_files = array_merge($cache_files, array_keys($media_files[$mediatype]['files'])); 91 } else { 92 // unset if prevented. Nothing will be printed for this mediatype. 93 unset($media_files[$mediatype]); 94 } 95 96 // finish event. 97 $CSSEvt->advise_after(); 98 } 99 100 // The generated script depends on some dynamic options 101 $cache = new cache('styles'.$_SERVER['HTTP_HOST'].$_SERVER['SERVER_PORT'].$INPUT->bool('preview').DOKU_BASE.$tpl.$type,'.css'); 102 $cache->_event = 'CSS_CACHE_USE'; 103 104 // check cache age & handle conditional request 105 // This may exit if a cache can be used 106 $cache_ok = $cache->useCache(array('files' => $cache_files)); 107 http_cached($cache->cache, $cache_ok); 108 109 // start output buffering 110 ob_start(); 111 112 // Fire CSS_STYLES_INCLUDED for one last time to let the 113 // plugins decide whether to include the DW default styles. 114 // This can be done by preventing the Default. 115 $media_files['DW_DEFAULT'] = css_filewrapper('DW_DEFAULT'); 116 trigger_event('CSS_STYLES_INCLUDED', $media_files['DW_DEFAULT'], 'css_defaultstyles'); 117 118 // build the stylesheet 119 foreach ($mediatypes as $mediatype) { 120 121 // Check if there is a wrapper set for this type. 122 if ( !isset($media_files[$mediatype]) ) { 123 continue; 124 } 125 126 $cssData = $media_files[$mediatype]; 127 128 // Print the styles. 129 print NL; 130 if ( $cssData['encapsulate'] === true ) print $cssData['encapsulationPrefix'] . ' {'; 131 print '/* START '.$cssData['mediatype'].' styles */'.NL; 132 133 // load files 134 foreach($cssData['files'] as $file => $location){ 135 $display = str_replace(fullpath(DOKU_INC), '', fullpath($file)); 136 print "\n/* XXXXXXXXX $display XXXXXXXXX */\n"; 137 print css_loadfile($file, $location); 138 } 139 140 print NL; 141 if ( $cssData['encapsulate'] === true ) print '} /* /@media '; 142 else print '/*'; 143 print ' END '.$cssData['mediatype'].' styles */'.NL; 144 } 145 146 // end output buffering and get contents 147 $css = ob_get_contents(); 148 ob_end_clean(); 149 150 // strip any source maps 151 stripsourcemaps($css); 152 153 // apply style replacements 154 $css = css_applystyle($css, $styleini['replacements']); 155 156 // parse less 157 $css = css_parseless($css); 158 159 // compress whitespace and comments 160 if($conf['compress']){ 161 $css = css_compress($css); 162 } 163 164 // embed small images right into the stylesheet 165 if($conf['cssdatauri']){ 166 $base = preg_quote(DOKU_BASE,'#'); 167 $css = preg_replace_callback('#(url\([ \'"]*)('.$base.')(.*?(?:\.(png|gif)))#i','css_datauri',$css); 168 } 169 170 http_cached_finish($cache->cache, $css); 171} 172 173/** 174 * Uses phpless to parse LESS in our CSS 175 * 176 * most of this function is error handling to show a nice useful error when 177 * LESS compilation fails 178 * 179 * @param string $css 180 * @return string 181 */ 182function css_parseless($css) { 183 global $conf; 184 185 $less = new lessc(); 186 $less->importDir = array(DOKU_INC); 187 $less->setPreserveComments(!$conf['compress']); 188 189 if (defined('DOKU_UNITTEST')){ 190 $less->importDir[] = TMP_DIR; 191 } 192 193 try { 194 return $less->compile($css); 195 } catch(Exception $e) { 196 // get exception message 197 $msg = str_replace(array("\n", "\r", "'"), array(), $e->getMessage()); 198 199 // try to use line number to find affected file 200 if(preg_match('/line: (\d+)$/', $msg, $m)){ 201 $msg = substr($msg, 0, -1* strlen($m[0])); //remove useless linenumber 202 $lno = $m[1]; 203 204 // walk upwards to last include 205 $lines = explode("\n", $css); 206 for($i=$lno-1; $i>=0; $i--){ 207 if(preg_match('/\/(\* XXXXXXXXX )(.*?)( XXXXXXXXX \*)\//', $lines[$i], $m)){ 208 // we found it, add info to message 209 $msg .= ' in '.$m[2].' at line '.($lno-$i); 210 break; 211 } 212 } 213 } 214 215 // something went wrong 216 $error = 'A fatal error occured during compilation of the CSS files. '. 217 'If you recently installed a new plugin or template it '. 218 'might be broken and you should try disabling it again. ['.$msg.']'; 219 220 echo ".dokuwiki:before { 221 content: '$error'; 222 background-color: red; 223 display: block; 224 background-color: #fcc; 225 border-color: #ebb; 226 color: #000; 227 padding: 0.5em; 228 }"; 229 230 exit; 231 } 232} 233 234/** 235 * Does placeholder replacements in the style according to 236 * the ones defined in a templates style.ini file 237 * 238 * This also adds the ini defined placeholders as less variables 239 * (sans the surrounding __ and with a ini_ prefix) 240 * 241 * @author Andreas Gohr <andi@splitbrain.org> 242 * 243 * @param string $css 244 * @param array $replacements array(placeholder => value) 245 * @return string 246 */ 247function css_applystyle($css, $replacements) { 248 // we convert ini replacements to LESS variable names 249 // and build a list of variable: value; pairs 250 $less = ''; 251 foreach((array) $replacements as $key => $value) { 252 $lkey = trim($key, '_'); 253 $lkey = '@ini_'.$lkey; 254 $less .= "$lkey: $value;\n"; 255 256 $replacements[$key] = $lkey; 257 } 258 259 // we now replace all old ini replacements with LESS variables 260 $css = strtr($css, $replacements); 261 262 // now prepend the list of LESS variables as the very first thing 263 $css = $less.$css; 264 return $css; 265} 266 267/** 268 * Load style ini contents 269 * 270 * Loads and merges style.ini files from template and config and prepares 271 * the stylesheet modes 272 * 273 * @author Andreas Gohr <andi@splitbrain.org> 274 * 275 * @param string $tpl the used template 276 * @param bool $preview load preview replacements 277 * @return array with keys 'stylesheets' and 'replacements' 278 */ 279function css_styleini($tpl, $preview=false) { 280 global $conf; 281 282 $stylesheets = array(); // mode, file => base 283 // guaranteed placeholder => value 284 $replacements = array( 285 '__text__' => "#000", 286 '__background__' => "#fff", 287 '__text_alt__' => "#999", 288 '__background_alt__' => "#eee", 289 '__text_neu__' => "#666", 290 '__background_neu__' => "#ddd", 291 '__border__' => "#ccc", 292 '__highlight__' => "#ff9", 293 '__link__' => "#00f", 294 ); 295 296 // load template's style.ini 297 $incbase = tpl_incdir($tpl); 298 $webbase = tpl_basedir($tpl); 299 $ini = $incbase.'style.ini'; 300 if(file_exists($ini)){ 301 $data = parse_ini_file($ini, true); 302 303 // stylesheets 304 if(is_array($data['stylesheets'])) foreach($data['stylesheets'] as $file => $mode){ 305 $stylesheets[$mode][$incbase.$file] = $webbase; 306 } 307 308 // replacements 309 if(is_array($data['replacements'])){ 310 $replacements = array_merge($replacements, css_fixreplacementurls($data['replacements'],$webbase)); 311 } 312 } 313 314 // load configs's style.ini 315 $webbase = DOKU_BASE; 316 $ini = DOKU_CONF."tpl/$tpl/style.ini"; 317 $incbase = dirname($ini).'/'; 318 if(file_exists($ini)){ 319 $data = parse_ini_file($ini, true); 320 321 // stylesheets 322 if(isset($data['stylesheets']) && is_array($data['stylesheets'])) foreach($data['stylesheets'] as $file => $mode){ 323 $stylesheets[$mode][$incbase.$file] = $webbase; 324 } 325 326 // replacements 327 if(isset($data['replacements']) && is_array($data['replacements'])){ 328 $replacements = array_merge($replacements, css_fixreplacementurls($data['replacements'],$webbase)); 329 } 330 } 331 332 // allow replacement overwrites in preview mode 333 if($preview) { 334 $webbase = DOKU_BASE; 335 $ini = $conf['cachedir'].'/preview.ini'; 336 if(file_exists($ini)) { 337 $data = parse_ini_file($ini, true); 338 // replacements 339 if(is_array($data['replacements'])) { 340 $replacements = array_merge($replacements, css_fixreplacementurls($data['replacements'], $webbase)); 341 } 342 } 343 } 344 345 return array( 346 'stylesheets' => $stylesheets, 347 'replacements' => $replacements 348 ); 349} 350 351/** 352 * Amend paths used in replacement relative urls, refer FS#2879 353 * 354 * @author Chris Smith <chris@jalakai.co.uk> 355 * 356 * @param array $replacements with key-value pairs 357 * @param string $location 358 * @return array 359 */ 360function css_fixreplacementurls($replacements, $location) { 361 foreach($replacements as $key => $value) { 362 $replacements[$key] = preg_replace('#(url\([ \'"]*)(?!/|data:|http://|https://| |\'|")#','\\1'.$location,$value); 363 } 364 return $replacements; 365} 366 367/** 368 * Wrapper for the files, content and mediatype for the event CSS_STYLES_INCLUDED 369 * 370 * @author Gerry Weißbach <gerry.w@gammaproduction.de> 371 * 372 * @param string $mediatype type ofthe current media files/content set 373 * @param array $files set of files that define the current mediatype 374 * @return array 375 */ 376function css_filewrapper($mediatype, $files=array()){ 377 return array( 378 'files' => $files, 379 'mediatype' => $mediatype, 380 'encapsulate' => $mediatype != 'all', 381 'encapsulationPrefix' => '@media '.$mediatype 382 ); 383} 384 385/** 386 * Prints the @media encapsulated default styles of DokuWiki 387 * 388 * @author Gerry Weißbach <gerry.w@gammaproduction.de> 389 * 390 * This function is being called by a CSS_STYLES_INCLUDED event 391 * The event can be distinguished by the mediatype which is: 392 * DW_DEFAULT 393 */ 394function css_defaultstyles(){ 395 // print the default classes for interwiki links and file downloads 396 print '@media screen {'; 397 css_interwiki(); 398 css_filetypes(); 399 print '}'; 400} 401 402/** 403 * Prints classes for interwikilinks 404 * 405 * Interwiki links have two classes: 'interwiki' and 'iw_$name>' where 406 * $name is the identifier given in the config. All Interwiki links get 407 * an default style with a default icon. If a special icon is available 408 * for an interwiki URL it is set in it's own class. Both classes can be 409 * overwritten in the template or userstyles. 410 * 411 * @author Andreas Gohr <andi@splitbrain.org> 412 */ 413function css_interwiki(){ 414 415 // default style 416 echo 'a.interwiki {'; 417 echo ' background: transparent url('.DOKU_BASE.'lib/images/interwiki.png) 0px 1px no-repeat;'; 418 echo ' padding: 1px 0px 1px 16px;'; 419 echo '}'; 420 421 // additional styles when icon available 422 $iwlinks = getInterwiki(); 423 foreach(array_keys($iwlinks) as $iw){ 424 $class = preg_replace('/[^_\-a-z0-9]+/i','_',$iw); 425 if(file_exists(DOKU_INC.'lib/images/interwiki/'.$iw.'.png')){ 426 echo "a.iw_$class {"; 427 echo ' background-image: url('.DOKU_BASE.'lib/images/interwiki/'.$iw.'.png)'; 428 echo '}'; 429 }elseif(file_exists(DOKU_INC.'lib/images/interwiki/'.$iw.'.gif')){ 430 echo "a.iw_$class {"; 431 echo ' background-image: url('.DOKU_BASE.'lib/images/interwiki/'.$iw.'.gif)'; 432 echo '}'; 433 } 434 } 435} 436 437/** 438 * Prints classes for file download links 439 * 440 * @author Andreas Gohr <andi@splitbrain.org> 441 */ 442function css_filetypes(){ 443 444 // default style 445 echo '.mediafile {'; 446 echo ' background: transparent url('.DOKU_BASE.'lib/images/fileicons/file.png) 0px 1px no-repeat;'; 447 echo ' padding-left: 18px;'; 448 echo ' padding-bottom: 1px;'; 449 echo '}'; 450 451 // additional styles when icon available 452 // scan directory for all icons 453 $exts = array(); 454 if($dh = opendir(DOKU_INC.'lib/images/fileicons')){ 455 while(false !== ($file = readdir($dh))){ 456 if(preg_match('/([_\-a-z0-9]+(?:\.[_\-a-z0-9]+)*?)\.(png|gif)/i',$file,$match)){ 457 $ext = strtolower($match[1]); 458 $type = '.'.strtolower($match[2]); 459 if($ext!='file' && (!isset($exts[$ext]) || $type=='.png')){ 460 $exts[$ext] = $type; 461 } 462 } 463 } 464 closedir($dh); 465 } 466 foreach($exts as $ext=>$type){ 467 $class = preg_replace('/[^_\-a-z0-9]+/','_',$ext); 468 echo ".mf_$class {"; 469 echo ' background-image: url('.DOKU_BASE.'lib/images/fileicons/'.$ext.$type.')'; 470 echo '}'; 471 } 472} 473 474/** 475 * Loads a given file and fixes relative URLs with the 476 * given location prefix 477 * 478 * @param string $file file system path 479 * @param string $location 480 * @return string 481 */ 482function css_loadfile($file,$location=''){ 483 $css_file = new DokuCssFile($file); 484 return $css_file->load($location); 485} 486 487/** 488 * Helper class to abstract loading of css/less files 489 * 490 * @author Chris Smith <chris@jalakai.co.uk> 491 */ 492class DokuCssFile { 493 494 protected $filepath; // file system path to the CSS/Less file 495 protected $location; // base url location of the CSS/Less file 496 protected $relative_path = null; 497 498 public function __construct($file) { 499 $this->filepath = $file; 500 } 501 502 /** 503 * Load the contents of the css/less file and adjust any relative paths/urls (relative to this file) to be 504 * relative to the dokuwiki root: the web root (DOKU_BASE) for most files; the file system root (DOKU_INC) 505 * for less files. 506 * 507 * @param string $location base url for this file 508 * @return string the CSS/Less contents of the file 509 */ 510 public function load($location='') { 511 if (!file_exists($this->filepath)) return ''; 512 513 $css = io_readFile($this->filepath); 514 if (!$location) return $css; 515 516 $this->location = $location; 517 518 $css = preg_replace_callback('#(url\( *)([\'"]?)(.*?)(\2)( *\))#',array($this,'replacements'),$css); 519 $css = preg_replace_callback('#(@import\s+)([\'"])(.*?)(\2)#',array($this,'replacements'),$css); 520 521 return $css; 522 } 523 524 /** 525 * Get the relative file system path of this file, relative to dokuwiki's root folder, DOKU_INC 526 * 527 * @return string relative file system path 528 */ 529 protected function getRelativePath(){ 530 531 if (is_null($this->relative_path)) { 532 $basedir = array(DOKU_INC); 533 534 // during testing, files may be found relative to a second base dir, TMP_DIR 535 if (defined('DOKU_UNITTEST')) { 536 $basedir[] = realpath(TMP_DIR); 537 } 538 539 $basedir = array_map('preg_quote_cb', $basedir); 540 $regex = '/^('.join('|',$basedir).')/'; 541 $this->relative_path = preg_replace($regex, '', dirname($this->filepath)); 542 } 543 544 return $this->relative_path; 545 } 546 547 /** 548 * preg_replace callback to adjust relative urls from relative to this file to relative 549 * to the appropriate dokuwiki root location as described in the code 550 * 551 * @param array see http://php.net/preg_replace_callback 552 * @return string see http://php.net/preg_replace_callback 553 */ 554 public function replacements($match) { 555 556 // not a relative url? - no adjustment required 557 if (preg_match('#^(/|data:|https?://)#',$match[3])) { 558 return $match[0]; 559 } 560 // a less file import? - requires a file system location 561 else if (substr($match[3],-5) == '.less') { 562 if ($match[3]{0} != '/') { 563 $match[3] = $this->getRelativePath() . '/' . $match[3]; 564 } 565 } 566 // everything else requires a url adjustment 567 else { 568 $match[3] = $this->location . $match[3]; 569 } 570 571 return join('',array_slice($match,1)); 572 } 573} 574 575/** 576 * Convert local image URLs to data URLs if the filesize is small 577 * 578 * Callback for preg_replace_callback 579 * 580 * @param array $match 581 * @return string 582 */ 583function css_datauri($match){ 584 global $conf; 585 586 $pre = unslash($match[1]); 587 $base = unslash($match[2]); 588 $url = unslash($match[3]); 589 $ext = unslash($match[4]); 590 591 $local = DOKU_INC.$url; 592 $size = @filesize($local); 593 if($size && $size < $conf['cssdatauri']){ 594 $data = base64_encode(file_get_contents($local)); 595 } 596 if (!empty($data)){ 597 $url = 'data:image/'.$ext.';base64,'.$data; 598 }else{ 599 $url = $base.$url; 600 } 601 return $pre.$url; 602} 603 604 605/** 606 * Returns a list of possible Plugin Styles (no existance check here) 607 * 608 * @author Andreas Gohr <andi@splitbrain.org> 609 * 610 * @param string $mediatype 611 * @return array 612 */ 613function css_pluginstyles($mediatype='screen'){ 614 $list = array(); 615 $plugins = plugin_list(); 616 foreach ($plugins as $p){ 617 $list[DOKU_PLUGIN."$p/$mediatype.css"] = DOKU_BASE."lib/plugins/$p/"; 618 $list[DOKU_PLUGIN."$p/$mediatype.less"] = DOKU_BASE."lib/plugins/$p/"; 619 // alternative for screen.css 620 if ($mediatype=='screen') { 621 $list[DOKU_PLUGIN."$p/style.css"] = DOKU_BASE."lib/plugins/$p/"; 622 $list[DOKU_PLUGIN."$p/style.less"] = DOKU_BASE."lib/plugins/$p/"; 623 } 624 } 625 return $list; 626} 627 628/** 629 * Very simple CSS optimizer 630 * 631 * @author Andreas Gohr <andi@splitbrain.org> 632 * 633 * @param string $css 634 * @return string 635 */ 636function css_compress($css){ 637 //strip comments through a callback 638 $css = preg_replace_callback('#(/\*)(.*?)(\*/)#s','css_comment_cb',$css); 639 640 //strip (incorrect but common) one line comments 641 $css = preg_replace_callback('/^.*\/\/.*$/m','css_onelinecomment_cb',$css); 642 643 // strip whitespaces 644 $css = preg_replace('![\r\n\t ]+!',' ',$css); 645 $css = preg_replace('/ ?([;,{}\/]) ?/','\\1',$css); 646 $css = preg_replace('/ ?: /',':',$css); 647 648 // number compression 649 $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" 650 $css = preg_replace('/([: ])\.(0)+((?:pt|pc|in|mm|cm|em|ex|px)\b|%)(?=[^\{]*[;\}])/', '$1$2', $css); // ".0em" to "0" 651 $css = preg_replace('/([: ]0)0*(\.0*)?((?:pt|pc|in|mm|cm|em|ex|px)(?=[^\{]*[;\}])\b|%)/', '$1', $css); // "0.0em" to "0" 652 $css = preg_replace('/([: ]\d+)(\.0*)((?:pt|pc|in|mm|cm|em|ex|px)(?=[^\{]*[;\}])\b|%)/', '$1$3', $css); // "1.0em" to "1em" 653 $css = preg_replace('/([: ])0+(\d+|\d*\.\d+)((?:pt|pc|in|mm|cm|em|ex|px)(?=[^\{]*[;\}])\b|%)/', '$1$2$3', $css); // "001em" to "1em" 654 655 // shorten attributes (1em 1em 1em 1em -> 1em) 656 $css = preg_replace('/(?<![\w\-])((?:margin|padding|border|border-(?:width|radius)):)([\w\.]+)( \2)+(?=[;\}]| !)/', '$1$2', $css); // "1em 1em 1em 1em" to "1em" 657 $css = preg_replace('/(?<![\w\-])((?:margin|padding|border|border-(?:width)):)([\w\.]+) ([\w\.]+) \2 \3(?=[;\}]| !)/', '$1$2 $3', $css); // "1em 2em 1em 2em" to "1em 2em" 658 659 // shorten colors 660 $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); 661 662 return $css; 663} 664 665/** 666 * Callback for css_compress() 667 * 668 * Keeps short comments (< 5 chars) to maintain typical browser hacks 669 * 670 * @author Andreas Gohr <andi@splitbrain.org> 671 * 672 * @param array $matches 673 * @return string 674 */ 675function css_comment_cb($matches){ 676 if(strlen($matches[2]) > 4) return ''; 677 return $matches[0]; 678} 679 680/** 681 * Callback for css_compress() 682 * 683 * Strips one line comments but makes sure it will not destroy url() constructs with slashes 684 * 685 * @param array $matches 686 * @return string 687 */ 688function css_onelinecomment_cb($matches) { 689 $line = $matches[0]; 690 691 $i = 0; 692 $len = strlen($line); 693 694 while ($i< $len){ 695 $nextcom = strpos($line, '//', $i); 696 $nexturl = stripos($line, 'url(', $i); 697 698 if($nextcom === false) { 699 // no more comments, we're done 700 $i = $len; 701 break; 702 } 703 704 // keep any quoted string that starts before a comment 705 $nextsqt = strpos($line, "'", $i); 706 $nextdqt = strpos($line, '"', $i); 707 if(min($nextsqt, $nextdqt) < $nextcom) { 708 $skipto = false; 709 if($nextsqt !== false && ($nextdqt === false || $nextsqt < $nextdqt)) { 710 $skipto = strpos($line, "'", $nextsqt+1) +1; 711 } else if ($nextdqt !== false) { 712 $skipto = strpos($line, '"', $nextdqt+1) +1; 713 } 714 715 if($skipto !== false) { 716 $i = $skipto; 717 continue; 718 } 719 } 720 721 if($nexturl === false || $nextcom < $nexturl) { 722 // no url anymore, strip comment and be done 723 $i = $nextcom; 724 break; 725 } 726 727 // we have an upcoming url 728 $i = strpos($line, ')', $nexturl); 729 } 730 731 return substr($line, 0, $i); 732} 733 734//Setup VIM: ex: et ts=4 : 735
