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/lib/exe/ -> css.php (source)

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