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"); 13if(!defined('DEFAULT_FLAVOUR')) define('DEFAULT_FLAVOUR',"style"); 14require_once(DOKU_INC.'inc/init.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 global $config_cascade; 34 global $INPUT; 35 36 if ($INPUT->str('s') == 'feed') { 37 $mediatypes = array('feed'); 38 $type = 'feed'; 39 } else { 40 $mediatypes = array('screen', 'all', 'print', 'handheld'); 41 $type = ''; 42 } 43 44 // decide from where to get the template 45 $tpl = trim(preg_replace('/[^\w-]+/','',$INPUT->str('t'))); 46 if(!$tpl) $tpl = $conf['template']; 47 48 // decide from where to get the template 49 $flavour = trim(preg_replace('/[^\w-]+/','',$INPUT->str('f'))); 50 if(!$flavour) $flavour = DEFAULT_FLAVOUR; 51 52 // load styl.ini 53 $styleini = css_styleini($tpl, $flavour, $INPUT->bool('preview')); 54 55 // cache influencers 56 $tplinc = tpl_incdir($tpl); 57 $cache_files = getConfigFiles('main'); 58 $cache_files[] = $tplinc.'style.ini'; 59 $cache_files[] = DOKU_CONF."tpl/$tpl/style.ini"; 60 $cache_files[] = DOKU_CONF."tpl/$tpl/ini/".$flavour.".ini"; 61 $cache_files[] = __FILE__; 62 if($INPUT->bool('preview')) $cache_files[] = $conf['cachedir'].'/preview.ini'; 63 64 // Array of needed files and their web locations, the latter ones 65 // are needed to fix relative paths in the stylesheets 66 // We only need to build the list for the requested flavour. 67 $media_files = array(); 68 foreach($mediatypes as $mediatype) { 69 $files = array(); 70 if ( $flavour === DEFAULT_FLAVOUR ) { 71 // load core styles 72 $files[DOKU_INC.'lib/styles/'.$mediatype.'.css'] = DOKU_BASE.'lib/styles/'; 73 74 // load jQuery-UI theme 75 if ($mediatype == 'screen') { 76 $files[DOKU_INC.'lib/scripts/jquery/jquery-ui-theme/smoothness.css'] = DOKU_BASE.'lib/scripts/jquery/jquery-ui-theme/'; 77 } 78 // load plugin styles 79 $files = array_merge($files, css_pluginstyles($mediatype)); 80 // load template styles 81 if (isset($styleini['stylesheets'][$mediatype])) { 82 $files = array_merge($files, $styleini['stylesheets'][$mediatype]); 83 } 84 // load user styles 85 if(!empty($config_cascade['userstyle'][$mediatype])) { 86 foreach($config_cascade['userstyle'][$mediatype] as $userstyle) { 87 $files[$userstyle] = DOKU_BASE; 88 } 89 } 90 } else if (isset($styleini['stylesheets'][$mediatype])) { 91 // only allow the predefined media types 92 $files = $styleini['stylesheets'][$mediatype]; 93 } 94 95 // Let plugins decide to either put more styles here or to remove some 96 $media_files[$mediatype] = css_filewrapper($mediatype, $flavour, $files); 97 $CSSEvt = new Doku_Event('CSS_STYLES_INCLUDED', $media_files[$mediatype]); 98 99 // Make it preventable. 100 if ( $CSSEvt->advise_before() ) { 101 $cache_files = array_merge($cache_files, array_keys($media_files[$mediatype]['files'])); 102 } else { 103 // unset if prevented. Nothing will be printed for this mediatype. 104 unset($media_files[$mediatype]); 105 } 106 107 // finish event. 108 $CSSEvt->advise_after(); 109 } 110 111 // The generated script depends on some dynamic options 112 $cache = new cache('styles'.$_SERVER['HTTP_HOST'].$_SERVER['SERVER_PORT'].DOKU_BASE.$tpl.$flavour.$type,'.css'); 113 $cache->_event = 'CSS_CACHE_USE'; 114 115 // check cache age & handle conditional request 116 // This may exit if a cache can be used 117 http_cached($cache->cache, 118 $cache->useCache(array('files' => $cache_files))); 119 120 // start output buffering 121 ob_start(); 122 123 if ( $flavour === DEFAULT_FLAVOUR ) { 124 // Fire CSS_STYLES_INCLUDED for one last time to let the 125 // plugins decide whether to include the DW default styles. 126 // This can be done by preventing the Default. 127 $media_files['DW_DEFAULT'] = css_filewrapper('DW_DEFAULT'); 128 trigger_event('CSS_STYLES_INCLUDED', $media_files['DW_DEFAULT'], 'css_defaultstyles'); 129 } 130 131 // build the stylesheet 132 foreach ($mediatypes as $mediatype) { 133 134 // Check if there is a wrapper set for this type. 135 if ( !isset($media_files[$mediatype]) ) { 136 continue; 137 } 138 139 $cssData = $media_files[$mediatype]; 140 141 // Print the styles. 142 print NL; 143 if ( $cssData['encapsulate'] === true ) print $cssData['encapsulationPrefix'] . ' {'; 144 print '/* START '.$cssData['mediatype'].' styles */'.NL; 145 146 // load files 147 foreach($cssData['files'] as $file => $location){ 148 $display = str_replace(fullpath(DOKU_INC), '', fullpath($file)); 149 print "\n/* XXXXXXXXX $display XXXXXXXXX */\n"; 150 print css_loadfile($file, $location); 151 } 152 153 print NL; 154 if ( $cssData['encapsulate'] === true ) print '} /* /@media '; 155 else print '/*'; 156 print ' END '.$cssData['mediatype'].' styles */'.NL; 157 } 158 159 // end output buffering and get contents 160 $css = ob_get_contents(); 161 ob_end_clean(); 162 163 // strip any source maps 164 stripsourcemaps($css); 165 166 // apply style replacements 167 $css = css_applystyle($css, $styleini['replacements']); 168 169 // parse less 170 $css = css_parseless($css); 171 172 // compress whitespace and comments 173 if($conf['compress']){ 174 $css = css_compress($css); 175 } 176 177 // embed small images right into the stylesheet 178 if($conf['cssdatauri']){ 179 $base = preg_quote(DOKU_BASE,'#'); 180 $css = preg_replace_callback('#(url\([ \'"]*)('.$base.')(.*?(?:\.(png|gif)))#i','css_datauri',$css); 181 } 182 183 http_cached_finish($cache->cache, $css); 184} 185 186/** 187 * Uses phpless to parse LESS in our CSS 188 * 189 * most of this function is error handling to show a nice useful error when 190 * LESS compilation fails 191 * 192 * @param string $css 193 * @return string 194 */ 195function css_parseless($css) { 196 global $conf; 197 198 $less = new lessc(); 199 $less->importDir = array(DOKU_INC); 200 $less->setPreserveComments(!$conf['compress']); 201 202 if (defined('DOKU_UNITTEST')){ 203 $less->importDir[] = TMP_DIR; 204 } 205 206 try { 207 return $less->compile($css); 208 } catch(Exception $e) { 209 // get exception message 210 $msg = str_replace(array("\n", "\r", "'"), array(), $e->getMessage()); 211 212 // try to use line number to find affected file 213 if(preg_match('/line: (\d+)$/', $msg, $m)){ 214 $msg = substr($msg, 0, -1* strlen($m[0])); //remove useless linenumber 215 $lno = $m[1]; 216 217 // walk upwards to last include 218 $lines = explode("\n", $css); 219 for($i=$lno-1; $i>=0; $i--){ 220 if(preg_match('/\/(\* XXXXXXXXX )(.*?)( XXXXXXXXX \*)\//', $lines[$i], $m)){ 221 // we found it, add info to message 222 $msg .= ' in '.$m[2].' at line '.($lno-$i); 223 break; 224 } 225 } 226 } 227 228 // something went wrong 229 $error = 'A fatal error occured during compilation of the CSS files. '. 230 'If you recently installed a new plugin or template it '. 231 'might be broken and you should try disabling it again. ['.$msg.']'; 232 233 echo ".dokuwiki:before { 234 content: '$error'; 235 background-color: red; 236 display: block; 237 background-color: #fcc; 238 border-color: #ebb; 239 color: #000; 240 padding: 0.5em; 241 }"; 242 243 exit; 244 } 245} 246 247/** 248 * Does placeholder replacements in the style according to 249 * the ones defined in a templates style.ini file 250 * 251 * This also adds the ini defined placeholders as less variables 252 * (sans the surrounding __ and with a ini_ prefix) 253 * 254 * @author Andreas Gohr <andi@splitbrain.org> 255 * 256 * @param string $css 257 * @param array $replacements array(placeholder => value) 258 * @return string 259 */ 260function css_applystyle($css, $replacements) { 261 // we convert ini replacements to LESS variable names 262 // and build a list of variable: value; pairs 263 $less = ''; 264 foreach((array) $replacements as $key => $value) { 265 $lkey = trim($key, '_'); 266 $lkey = '@ini_'.$lkey; 267 $less .= "$lkey: $value;\n"; 268 269 $replacements[$key] = $lkey; 270 } 271 272 // we now replace all old ini replacements with LESS variables 273 $css = strtr($css, $replacements); 274 275 // now prepend the list of LESS variables as the very first thing 276 $css = $less.$css; 277 return $css; 278} 279 280/** 281 * Load style ini contents 282 * 283 * Loads and merges style.ini files from template and config and prepares 284 * the stylesheet modes 285 * 286 * @author Andreas Gohr <andi@splitbrain.org> 287 * 288 * @param string $tpl the used template 289 * @param bool $preview load preview replacements 290 * @return array with keys 'stylesheets' and 'replacements' 291 */ 292function css_styleini($tpl, $flavour=DEFAULT_FLAVOUR, $preview=false) { 293 global $conf; 294 295 $stylesheets = array(); // mode, file => base 296 $replacements = array(); // placeholder => value 297 298 // load template style.ini replacements first 299 // they should be the base for the colors - if not the default flavour 300 $incbase = tpl_incdir($tpl); 301 $webbase = tpl_basedir($tpl); 302 $ini = $incbase.DEFAULT_FLAVOUR.'.ini'; 303 if($flavour != DEFAULT_FLAVOUR && file_exists($ini)) { 304 $data = parse_ini_file($ini, true); 305 // replacements 306 if(is_array($data['replacements'])) { 307 $replacements = array_merge($replacements, css_fixreplacementurls($data['replacements'], $webbase)); 308 } 309 } 310 311 // load template's style.ini 312 $ini = $incbase.$flavour.'.ini'; 313 if(file_exists($ini)){ 314 $data = parse_ini_file($ini, true); 315 316 // stylesheets 317 if(is_array($data['stylesheets'])) foreach($data['stylesheets'] as $file => $mode){ 318 $stylesheets[$mode][$incbase.$file] = $webbase; 319 } 320 // replacements 321 if(isset($data['replacements']) && is_array($data['replacements'])){ 322 $replacements = array_merge($replacements, css_fixreplacementurls($data['replacements'],$webbase)); 323 } 324 } 325 326 // load configs's style.ini 327 $webbase = DOKU_BASE; 328 $ini = DOKU_CONF."tpl/$tpl/style.ini"; 329 $incbase = dirname($ini).'/'; 330 if(file_exists($ini)){ 331 $data = parse_ini_file($ini, true); 332 333 // stylesheets - but only if we are on the default flavour 334 if($flavour === DEFAULT_FLAVOUR && isset($data['stylesheets']) && is_array($data['stylesheets'])) foreach($data['stylesheets'] as $file => $mode){ 335 $stylesheets[$mode][$incbase.$file] = $webbase; 336 } 337 // replacements 338 if(isset($data['replacements']) && is_array($data['replacements'])){ 339 $replacements = array_merge($replacements, css_fixreplacementurls($data['replacements'],$webbase)); 340 } 341 } 342 343 // allow replacement overwrites in preview mode 344 if($preview) { 345 $webbase = DOKU_BASE; 346 $ini = $conf['cachedir'].'/preview.ini'; 347 if(file_exists($ini)) { 348 $data = parse_ini_file($ini, true); 349 // replacements 350 if(is_array($data['replacements'])) { 351 $replacements = array_merge($replacements, css_fixreplacementurls($data['replacements'], $webbase)); 352 } 353 } 354 } 355 356 return array( 357 'stylesheets' => $stylesheets, 358 'replacements' => $replacements 359 ); 360} 361 362/** 363 * Amend paths used in replacement relative urls, refer FS#2879 364 * 365 * @author Chris Smith <chris@jalakai.co.uk> 366 * 367 * @param array $replacements with key-value pairs 368 * @param string $location 369 * @return array 370 */ 371function css_fixreplacementurls($replacements, $location) { 372 foreach($replacements as $key => $value) { 373 $replacements[$key] = preg_replace('#(url\([ \'"]*)(?!/|data:|http://|https://| |\'|")#','\\1'.$location,$value); 374 } 375 return $replacements; 376} 377 378/** 379 * Wrapper for the files, content and mediatype for the event CSS_STYLES_INCLUDED 380 * 381 * @author Gerry Weißbach <gerry.w@gammaproduction.de> 382 * 383 * @param string $mediatype type ofthe current media files/content set 384 * @param array $files set of files that define the current mediatype 385 * @return array 386 */ 387function css_filewrapper($mediatype, $flavour=DEFAULT_FLAVOUR, $files=array()){ 388 return array( 389 'files' => $files, 390 'mediatype' => $mediatype, 391 'flavour' => $flavour, 392 'encapsulate' => in_array($mediatype, array('screen', 'print', 'handheld')), 393 'encapsulationPrefix' => '@media '.$mediatype 394 ); 395} 396 397/** 398 * Prints the @media encapsulated default styles of DokuWiki 399 * 400 * @author Gerry Weißbach <gerry.w@gammaproduction.de> 401 * 402 * This function is being called by a CSS_STYLES_INCLUDED event 403 * The event can be distinguished by the mediatype which is: 404 * DW_DEFAULT 405 */ 406function css_defaultstyles(){ 407 // print the default classes for interwiki links and file downloads 408 print '@media screen {'; 409 css_interwiki(); 410 css_filetypes(); 411 print '}'; 412} 413 414/** 415 * Prints classes for interwikilinks 416 * 417 * Interwiki links have two classes: 'interwiki' and 'iw_$name>' where 418 * $name is the identifier given in the config. All Interwiki links get 419 * an default style with a default icon. If a special icon is available 420 * for an interwiki URL it is set in it's own class. Both classes can be 421 * overwritten in the template or userstyles. 422 * 423 * @author Andreas Gohr <andi@splitbrain.org> 424 */ 425function css_interwiki(){ 426 427 // default style 428 echo 'a.interwiki {'; 429 echo ' background: transparent url('.DOKU_BASE.'lib/images/interwiki.png) 0px 1px no-repeat;'; 430 echo ' padding: 1px 0px 1px 16px;'; 431 echo '}'; 432 433 // additional styles when icon available 434 $iwlinks = getInterwiki(); 435 foreach(array_keys($iwlinks) as $iw){ 436 $class = preg_replace('/[^_\-a-z0-9]+/i','_',$iw); 437 if(file_exists(DOKU_INC.'lib/images/interwiki/'.$iw.'.png')){ 438 echo "a.iw_$class {"; 439 echo ' background-image: url('.DOKU_BASE.'lib/images/interwiki/'.$iw.'.png)'; 440 echo '}'; 441 }elseif(file_exists(DOKU_INC.'lib/images/interwiki/'.$iw.'.gif')){ 442 echo "a.iw_$class {"; 443 echo ' background-image: url('.DOKU_BASE.'lib/images/interwiki/'.$iw.'.gif)'; 444 echo '}'; 445 } 446 } 447} 448 449/** 450 * Prints classes for file download links 451 * 452 * @author Andreas Gohr <andi@splitbrain.org> 453 */ 454function css_filetypes(){ 455 456 // default style 457 echo '.mediafile {'; 458 echo ' background: transparent url('.DOKU_BASE.'lib/images/fileicons/file.png) 0px 1px no-repeat;'; 459 echo ' padding-left: 18px;'; 460 echo ' padding-bottom: 1px;'; 461 echo '}'; 462 463 // additional styles when icon available 464 // scan directory for all icons 465 $exts = array(); 466 if($dh = opendir(DOKU_INC.'lib/images/fileicons')){ 467 while(false !== ($file = readdir($dh))){ 468 if(preg_match('/([_\-a-z0-9]+(?:\.[_\-a-z0-9]+)*?)\.(png|gif)/i',$file,$match)){ 469 $ext = strtolower($match[1]); 470 $type = '.'.strtolower($match[2]); 471 if($ext!='file' && (!isset($exts[$ext]) || $type=='.png')){ 472 $exts[$ext] = $type; 473 } 474 } 475 } 476 closedir($dh); 477 } 478 foreach($exts as $ext=>$type){ 479 $class = preg_replace('/[^_\-a-z0-9]+/','_',$ext); 480 echo ".mf_$class {"; 481 echo ' background-image: url('.DOKU_BASE.'lib/images/fileicons/'.$ext.$type.')'; 482 echo '}'; 483 } 484} 485 486/** 487 * Loads a given file and fixes relative URLs with the 488 * given location prefix 489 * 490 * @param string $file file system path 491 * @param string $location 492 * @return string 493 */ 494function css_loadfile($file,$location=''){ 495 $css_file = new DokuCssFile($file); 496 return $css_file->load($location); 497} 498 499/** 500 * Helper class to abstract loading of css/less files 501 * 502 * @author Chris Smith <chris@jalakai.co.uk> 503 */ 504class DokuCssFile { 505 506 protected $filepath; // file system path to the CSS/Less file 507 protected $location; // base url location of the CSS/Less file 508 protected $relative_path = null; 509 510 public function __construct($file) { 511 $this->filepath = $file; 512 } 513 514 /** 515 * Load the contents of the css/less file and adjust any relative paths/urls (relative to this file) to be 516 * relative to the dokuwiki root: the web root (DOKU_BASE) for most files; the file system root (DOKU_INC) 517 * for less files. 518 * 519 * @param string $location base url for this file 520 * @return string the CSS/Less contents of the file 521 */ 522 public function load($location='') { 523 if (!file_exists($this->filepath)) return ''; 524 525 $css = io_readFile($this->filepath); 526 if (!$location) return $css; 527 528 $this->location = $location; 529 530 $css = preg_replace_callback('#(url\( *)([\'"]?)(.*?)(\2)( *\))#',array($this,'replacements'),$css); 531 $css = preg_replace_callback('#(@import\s+)([\'"])(.*?)(\2)#',array($this,'replacements'),$css); 532 533 return $css; 534 } 535 536 /** 537 * Get the relative file system path of this file, relative to dokuwiki's root folder, DOKU_INC 538 * 539 * @return string relative file system path 540 */ 541 protected function getRelativePath(){ 542 543 if (is_null($this->relative_path)) { 544 $basedir = array(DOKU_INC); 545 546 // during testing, files may be found relative to a second base dir, TMP_DIR 547 if (defined('DOKU_UNITTEST')) { 548 $basedir[] = realpath(TMP_DIR); 549 } 550 551 $basedir = array_map('preg_quote_cb', $basedir); 552 $regex = '/^('.join('|',$basedir).')/'; 553 $this->relative_path = preg_replace($regex, '', dirname($this->filepath)); 554 } 555 556 return $this->relative_path; 557 } 558 559 /** 560 * preg_replace callback to adjust relative urls from relative to this file to relative 561 * to the appropriate dokuwiki root location as described in the code 562 * 563 * @param array see http://php.net/preg_replace_callback 564 * @return string see http://php.net/preg_replace_callback 565 */ 566 public function replacements($match) { 567 568 // not a relative url? - no adjustment required 569 if (preg_match('#^(/|data:|https?://)#',$match[3])) { 570 return $match[0]; 571 } 572 // a less file import? - requires a file system location 573 else if (substr($match[3],-5) == '.less') { 574 if ($match[3]{0} != '/') { 575 $match[3] = $this->getRelativePath() . '/' . $match[3]; 576 } 577 } 578 // everything else requires a url adjustment 579 else { 580 $match[3] = $this->location . $match[3]; 581 } 582 583 return join('',array_slice($match,1)); 584 } 585} 586 587/** 588 * Convert local image URLs to data URLs if the filesize is small 589 * 590 * Callback for preg_replace_callback 591 * 592 * @param array $match 593 * @return string 594 */ 595function css_datauri($match){ 596 global $conf; 597 598 $pre = unslash($match[1]); 599 $base = unslash($match[2]); 600 $url = unslash($match[3]); 601 $ext = unslash($match[4]); 602 603 $local = DOKU_INC.$url; 604 $size = @filesize($local); 605 if($size && $size < $conf['cssdatauri']){ 606 $data = base64_encode(file_get_contents($local)); 607 } 608 if($data){ 609 $url = 'data:image/'.$ext.';base64,'.$data; 610 }else{ 611 $url = $base.$url; 612 } 613 return $pre.$url; 614} 615 616 617/** 618 * Returns a list of possible Plugin Styles (no existance check here) 619 * 620 * @author Andreas Gohr <andi@splitbrain.org> 621 * 622 * @param string $mediatype 623 * @return array 624 */ 625function css_pluginstyles($mediatype='screen'){ 626 $list = array(); 627 $plugins = plugin_list(); 628 foreach ($plugins as $p){ 629 $list[DOKU_PLUGIN."$p/$mediatype.css"] = DOKU_BASE."lib/plugins/$p/"; 630 $list[DOKU_PLUGIN."$p/$mediatype.less"] = DOKU_BASE."lib/plugins/$p/"; 631 // alternative for screen.css 632 if ($mediatype=='screen') { 633 $list[DOKU_PLUGIN."$p/style.css"] = DOKU_BASE."lib/plugins/$p/"; 634 $list[DOKU_PLUGIN."$p/style.less"] = DOKU_BASE."lib/plugins/$p/"; 635 } 636 } 637 return $list; 638} 639 640/** 641 * Very simple CSS optimizer 642 * 643 * @author Andreas Gohr <andi@splitbrain.org> 644 * 645 * @param string $css 646 * @return string 647 */ 648function css_compress($css){ 649 //strip comments through a callback 650 $css = preg_replace_callback('#(/\*)(.*?)(\*/)#s','css_comment_cb',$css); 651 652 //strip (incorrect but common) one line comments 653 $css = preg_replace_callback('/^.*\/\/.*$/m','css_onelinecomment_cb',$css); 654 655 // strip whitespaces 656 $css = preg_replace('![\r\n\t ]+!',' ',$css); 657 $css = preg_replace('/ ?([;,{}\/]) ?/','\\1',$css); 658 $css = preg_replace('/ ?: /',':',$css); 659 660 // number compression 661 $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" 662 $css = preg_replace('/([: ])\.(0)+((?:pt|pc|in|mm|cm|em|ex|px)\b|%)(?=[^\{]*[;\}])/', '$1$2', $css); // ".0em" to "0" 663 $css = preg_replace('/([: ]0)0*(\.0*)?((?:pt|pc|in|mm|cm|em|ex|px)(?=[^\{]*[;\}])\b|%)/', '$1', $css); // "0.0em" to "0" 664 $css = preg_replace('/([: ]\d+)(\.0*)((?:pt|pc|in|mm|cm|em|ex|px)(?=[^\{]*[;\}])\b|%)/', '$1$3', $css); // "1.0em" to "1em" 665 $css = preg_replace('/([: ])0+(\d+|\d*\.\d+)((?:pt|pc|in|mm|cm|em|ex|px)(?=[^\{]*[;\}])\b|%)/', '$1$2$3', $css); // "001em" to "1em" 666 667 // shorten attributes (1em 1em 1em 1em -> 1em) 668 $css = preg_replace('/(?<![\w\-])((?:margin|padding|border|border-(?:width|radius)):)([\w\.]+)( \2)+(?=[;\}]| !)/', '$1$2', $css); // "1em 1em 1em 1em" to "1em" 669 $css = preg_replace('/(?<![\w\-])((?:margin|padding|border|border-(?:width)):)([\w\.]+) ([\w\.]+) \2 \3(?=[;\}]| !)/', '$1$2 $3', $css); // "1em 2em 1em 2em" to "1em 2em" 670 671 // shorten colors 672 $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); 673 674 return $css; 675} 676 677/** 678 * Callback for css_compress() 679 * 680 * Keeps short comments (< 5 chars) to maintain typical browser hacks 681 * 682 * @author Andreas Gohr <andi@splitbrain.org> 683 * 684 * @param array $matches 685 * @return string 686 */ 687function css_comment_cb($matches){ 688 if(strlen($matches[2]) > 4) return ''; 689 return $matches[0]; 690} 691 692/** 693 * Callback for css_compress() 694 * 695 * Strips one line comments but makes sure it will not destroy url() constructs with slashes 696 * 697 * @param array $matches 698 * @return string 699 */ 700function css_onelinecomment_cb($matches) { 701 $line = $matches[0]; 702 703 $i = 0; 704 $len = strlen($line); 705 706 while ($i< $len){ 707 $nextcom = strpos($line, '//', $i); 708 $nexturl = stripos($line, 'url(', $i); 709 710 if($nextcom === false) { 711 // no more comments, we're done 712 $i = $len; 713 break; 714 } 715 716 // keep any quoted string that starts before a comment 717 $nextsqt = strpos($line, "'", $i); 718 $nextdqt = strpos($line, '"', $i); 719 if(min($nextsqt, $nextdqt) < $nextcom) { 720 $skipto = false; 721 if($nextsqt !== false && ($nextdqt === false || $nextsqt < $nextdqt)) { 722 $skipto = strpos($line, "'", $nextsqt+1) +1; 723 } else if ($nextdqt !== false) { 724 $skipto = strpos($line, '"', $nextdqt+1) +1; 725 } 726 727 if($skipto !== false) { 728 $i = $skipto; 729 continue; 730 } 731 } 732 733 if($nexturl === false || $nextcom < $nexturl) { 734 // no url anymore, strip comment and be done 735 $i = $nextcom; 736 break; 737 } 738 739 // we have an upcoming url 740 $i = strpos($line, ')', $nexturl); 741 } 742 743 return substr($line, 0, $i); 744} 745 746//Setup VIM: ex: et ts=4 : 747
