Annotation of loncom/xml/lonxml.pm, revision 1.238

1.2       sakharuk    1: # The LearningOnline Network with CAPA
1.3       sakharuk    2: # XML Parser Module 
1.2       sakharuk    3: #
1.238   ! albertel    4: # $Id: lonxml.pm,v 1.237 2003/02/19 15:20:35 sakharuk Exp $
1.139     www         5: #
                      6: # Copyright Michigan State University Board of Trustees
                      7: #
                      8: # This file is part of the LearningOnline Network with CAPA (LON-CAPA).
                      9: #
                     10: # LON-CAPA is free software; you can redistribute it and/or modify
                     11: # it under the terms of the GNU General Public License as published by
                     12: # the Free Software Foundation; either version 2 of the License, or
                     13: # (at your option) any later version.
                     14: #
                     15: # LON-CAPA is distributed in the hope that it will be useful,
                     16: # but WITHOUT ANY WARRANTY; without even the implied warranty of
                     17: # MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
                     18: # GNU General Public License for more details.
                     19: #
                     20: # You should have received a copy of the GNU General Public License
                     21: # along with LON-CAPA; if not, write to the Free Software
                     22: # Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA  02111-1307  USA
                     23: #
                     24: # /home/httpd/html/adm/gpl.txt
                     25: #
                     26: # http://www.lon-capa.org/
                     27: #
                     28: # Copyright for TtHfunc and TtMfunc by Ian Hutchinson. 
                     29: # TtHfunc and TtMfunc (the "Code") may be compiled and linked into 
                     30: # binary executable programs or libraries distributed by the 
                     31: # Michigan State University (the "Licensee"), but any binaries so 
                     32: # distributed are hereby licensed only for use in the context
                     33: # of a program or computational system for which the Licensee is the 
                     34: # primary author or distributor, and which performs substantial 
                     35: # additional tasks beyond the translation of (La)TeX into HTML.
                     36: # The C source of the Code may not be distributed by the Licensee
                     37: # to any other parties under any circumstances.
                     38: #
1.3       sakharuk   39: # last modified 06/26/00 by Alexander Sakharuk
1.33      www        40: # 11/6 Gerd Kortemeyer
1.45      www        41: # 6/1/1 Gerd Kortemeyer
1.56      albertel   42: # 2/21,3/13 Guy
1.68      www        43: # 3/29,5/4 Gerd Kortemeyer
1.78      www        44: # 5/26 Gerd Kortemeyer
1.80      harris41   45: # 5/27 H. K. Ng
1.89      www        46: # 6/2,6/3,6/8,6/9 Gerd Kortemeyer
1.93      ng         47: # 6/12,6/13 H. K. Ng
1.95      www        48: # 6/16 Gerd Kortemeyer
1.104     ng         49: # 7/27 H. K. Ng
1.127     www        50: # 8/7,8/9,8/10,8/11,8/15,8/16,8/17,8/18,8/20,8/23,8/24 Gerd Kortemeyer
1.130     www        51: # Guy Albertelli
                     52: # 9/26 Gerd Kortemeyer
1.143     www        53: # Dec Guy Albertelli
                     54: # YEAR=2002
                     55: # 1/1 Gerd Kortemeyer
1.145     www        56: # 1/2 Matthew Hall
                     57: # 1/3 Gerd Kortemeyer
1.143     www        58: #
1.2       sakharuk   59: 
1.4       albertel   60: package Apache::lonxml; 
1.33      www        61: use vars 
1.205     www        62: qw(@pwd @outputstack $redirection $import @extlinks $metamode $evaluate %insertlist @namespace $prevent_entity_encode $errorcount $warningcount);
1.1       sakharuk   63: use strict;
1.167     albertel   64: use HTML::LCParser();
1.161     albertel   65: use HTML::TreeBuilder();
                     66: use HTML::Entities();
                     67: use Safe();
                     68: use Safe::Hole();
                     69: use Math::Cephes();
                     70: use Math::Random();
                     71: use Opcode();
1.72      albertel   72: 
                     73: sub register {
1.141     albertel   74:   my ($space,@taglist) = @_;
                     75:   foreach my $temptag (@taglist) {
                     76:     push(@{ $Apache::lonxml::alltags{$temptag} },$space);
1.72      albertel   77:   }
                     78: }
                     79: 
1.141     albertel   80: sub deregister {
                     81:   my ($space,@taglist) = @_;
                     82:   foreach my $temptag (@taglist) {
                     83:     my $tempspace = $Apache::lonxml::alltags{$temptag}[-1];
                     84:     if ($tempspace eq $space) {
                     85:       pop(@{ $Apache::lonxml::alltags{$temptag} });
                     86:     }
                     87:   }
1.142     albertel   88:   #&printalltags();
1.141     albertel   89: }
                     90: 
1.46      www        91: use Apache::Constants qw(:common);
1.161     albertel   92: use Apache::lontexconvert();
                     93: use Apache::style();
                     94: use Apache::run();
                     95: use Apache::londefdef();
                     96: use Apache::scripttag();
                     97: use Apache::edit();
                     98: use Apache::lonnet();
                     99: use Apache::File();
                    100: use Apache::loncommon();
1.198     www       101: use Apache::lonfeedback();
1.200     www       102: use Apache::lonmsg();
1.217     matthew   103: use Apache::loncacc();
1.79      www       104: 
1.72      albertel  105: #==================================================   Main subroutine: xmlparse  
                    106: #debugging control, to turn on debugging modify the correct handler
                    107: $Apache::lonxml::debug=0;
1.206     albertel  108: 
                    109: # keeps count of the number of warnings and errors generated in a parse
                    110: $warningcount=0;
                    111: $errorcount=0;
1.72      albertel  112: 
                    113: #path to the directory containing the file currently being processed
                    114: @pwd=();
                    115: 
                    116: #these two are used for capturing a subset of the output for later processing,
                    117: #don't touch them directly use &startredirection and &endredirection
                    118: @outputstack = ();
                    119: $redirection = 0;
                    120: 
                    121: #controls wheter the <import> tag actually does
                    122: $import = 1;
                    123: @extlinks=();
                    124: 
                    125: # meta mode is a bit weird only some output is to be turned off
                    126: #<output> tag turns metamode off (defined in londefdef.pm)
                    127: $metamode = 0;
                    128: 
                    129: # turns on and of run::evaluate actually derefencing var refs
                    130: $evaluate = 1;
1.7       albertel  131: 
1.74      albertel  132: # data structure for eidt mode, determines what tags can go into what other tags
                    133: %insertlist=();
1.68      www       134: 
1.99      albertel  135: # stores the list of active tag namespaces
1.76      albertel  136: @namespace=();
                    137: 
1.169     albertel  138: # if 0 all high ASCII characters will be encoded into HTML Entities
                    139: $prevent_entity_encode=0;
                    140: 
1.99      albertel  141: # has the dynamic menu been updated to know about this resource
                    142: $Apache::lonxml::registered=0;
                    143: 
1.172     albertel  144: # a pointer the the Apache request object
                    145: $Apache::lonxml::request='';
                    146: 
1.216     sakharuk  147: # a problem number counter, and check on ether it is used
1.237     sakharuk  148: $Apache::lonxml::counter=1;
1.204     albertel  149: $Apache::lonxml::counter_changed=0;
                    150: 
1.212     albertel  151: #internal check on whether to look at style defs
                    152: $Apache::lonxml::usestyle=1;
                    153: 
1.68      www       154: sub xmlbegin {
                    155:   my $output='';
                    156:   if ($ENV{'browser.mathml'}) {
                    157:       $output='<?xml version="1.0"?>'
                    158:             .'<?xml-stylesheet type="text/css" href="/adm/MathML/mathml.css"?>'
                    159:             .'<!DOCTYPE html SYSTEM "/adm/MathML/mathml.dtd" '
                    160:             .'[<!ENTITY mathns "http://www.w3.org/1998/Math/MathML">]>'
                    161:             .'<html xmlns:math="http://www.w3.org/1998/Math/MathML" ' 
                    162: 		.'xmlns="http://www.w3.org/TR/REC-html40">';
                    163:   } else {
                    164:       $output='<html>';
                    165:   }
                    166:   return $output;
                    167: }
                    168: 
                    169: sub xmlend {
1.194     www       170:     my ($discussiononly,$symb)=@_;
1.103     www       171:     my $discussion='';
                    172:     if ($ENV{'request.course.id'}) {
1.109     www       173:        my $crs='/'.$ENV{'request.course.id'};
                    174:        if ($ENV{'request.course.sec'}) {
                    175:           $crs.='_'.$ENV{'request.course.sec'};
                    176:        }                 
                    177:        $crs=~s/\_/\//g;
                    178:        my $seeid=&Apache::lonnet::allowed('rin',$crs);
1.194     www       179:        unless ($symb) {
                    180:            $symb=&Apache::lonnet::symbread();
                    181:        }
1.103     www       182:        if ($symb) {
                    183:           my %contrib=&Apache::lonnet::restore($symb,$ENV{'request.course.id'},
                    184:                      $ENV{'course.'.$ENV{'request.course.id'}.'.domain'},
                    185: 		     $ENV{'course.'.$ENV{'request.course.id'}.'.num'});
                    186:           if ($contrib{'version'}) {
1.194     www       187:               unless ($discussiononly) {
                    188:                  $discussion.=
                    189:                   '<address><hr />';
                    190: 	     }
1.103     www       191:               my $idx;
                    192:               for ($idx=1;$idx<=$contrib{'version'};$idx++) {
1.110     www       193: 		my $hidden=($contrib{'hidden'}=~/\.$idx\./);
1.222     www       194: 		my $deleted=($contrib{'deleted'}=~/\.$idx\./);
                    195: 		unless ((($hidden) && (!$seeid)) || ($deleted)) {
1.110     www       196:                  my $message=$contrib{$idx.':message'};
                    197:                  $message=~s/\n/\<br \/\>/g;
1.186     www       198: 		 $message=&Apache::lontexconvert::msgtexconverted($message);
1.110     www       199:                  if ($message) {
                    200:                   if ($hidden) {
                    201: 		      $message='<font color="#888888">'.$message.'</font>';
                    202:                   }
1.196     www       203:                   my $screenname=&Apache::loncommon::screenname(
                    204:                                $contrib{$idx.':sendername'},
                    205: 			       $contrib{$idx.':senderdomain'});
                    206:                   my $plainname=&Apache::loncommon::nickname(
                    207:                                $contrib{$idx.':sendername'},
                    208: 			       $contrib{$idx.':senderdomain'});
                    209: 
1.109     www       210:                   my $sender='Anonymous';
                    211:                   if ((!$contrib{$idx.':anonymous'}) || ($seeid)) {
1.194     www       212:                       $sender=&Apache::loncommon::aboutmewrapper(
1.196     www       213:                                $plainname,
1.194     www       214:                                $contrib{$idx.':sendername'},
                    215:                                $contrib{$idx.':senderdomain'}).' ('.
1.164     www       216:                               $contrib{$idx.':sendername'}.' at '.
                    217: 		      $contrib{$idx.':senderdomain'}.')';
1.109     www       218:                       if ($contrib{$idx.':anonymous'}) {
1.164     www       219: 			  $sender.=' [anonymous] '.
1.196     www       220:                                      $screenname;
1.110     www       221:                       }
                    222:                       if ($seeid) {
                    223: 			  if ($hidden) {
                    224:                              $sender.=' <a href="/adm/feedback?unhide='.
                    225: 				 $symb.':::'.$idx.'">Make Visible</a>';
                    226:                           } else {
                    227:                              $sender.=' <a href="/adm/feedback?hide='.
                    228: 				 $symb.':::'.$idx.'">Hide</a>';
1.222     www       229: 			  }                     
                    230:                           $sender.=' <a href="/adm/feedback?deldisc='.
                    231: 				 $symb.':::'.$idx.'">Delete</a>';
                    232:                       }
1.164     www       233:                   } else {
1.196     www       234:                       if ($screenname) {
                    235: 			  $sender='<i>'.$screenname.'</i>';
1.164     www       236:                       }
1.109     www       237:                   }
                    238: 		  $discussion.='<p><b>'.$sender.'</b> ('.
1.103     www       239:                       localtime($contrib{$idx.':timestamp'}).
                    240:                       '):<blockquote>'.$message.
1.110     www       241:                       '</blockquote></p>';
                    242: 	        }
                    243:                } 
1.103     www       244:               }
1.194     www       245:               unless ($discussiononly) {
                    246:                  $discussion.='</address>';
                    247: 	      }
                    248:           }
                    249:           if ($discussiononly) {
1.195     www       250: 	      $discussion.=(<<ENDDISCUSS);
1.198     www       251: <form action="/adm/feedback" method="post" name="mailform">
1.195     www       252: <input type="submit" name="discuss" value="Post Discussion" />
                    253: <input type="submit" name="anondiscuss" value="Post Anonymous Discussion" />
                    254: <input type="hidden" name="symb" value="$symb" />
                    255: <input type="hidden" name="sendit" value="true" />
                    256: <br />
                    257: <font size="1">Note: in anonymous discussion, your name is visible only to
                    258: course faculty</font><br />
                    259: <textarea name=comment cols=60 rows=10 wrap=hard></textarea>
                    260: </form>
                    261: ENDDISCUSS
1.198     www       262:              $discussion.=&Apache::lonfeedback::generate_preview_button();
1.103     www       263:           }
                    264:        }
                    265:     }
1.194     www       266:     return $discussion.($discussiononly?'':'</html>');
1.119     www       267: }
                    268: 
                    269: sub tokeninputfield {
1.120     www       270:     my $defhost=$Apache::lonnet::perlvar{'lonHostID'};
                    271:     $defhost=~tr/a-z/A-Z/;
1.119     www       272:     return (<<ENDINPUTFIELD)
1.226     albertel  273: <script type="text/javascript">
1.120     www       274:     function updatetoken() {
                    275: 	var comp=new Array;
                    276:         var barcode=unescape(document.tokeninput.barcode.value);
                    277:         comp=barcode.split('*');
                    278:         if (typeof(comp[0])!="undefined") {
                    279: 	    document.tokeninput.codeone.value=comp[0];
                    280: 	}
                    281:         if (typeof(comp[1])!="undefined") {
                    282: 	    document.tokeninput.codetwo.value=comp[1];
                    283: 	}
                    284:         if (typeof(comp[2])!="undefined") {
                    285:             comp[2]=comp[2].toUpperCase();
                    286: 	    document.tokeninput.codethree.value=comp[2];
                    287: 	}
                    288:         document.tokeninput.barcode.value='';
                    289:     }  
                    290: </script>
                    291: <form method="post" name="tokeninput">
1.119     www       292: <table border="2" bgcolor="#FFFFBB">
                    293: <tr><th>DocID Checkin</th></tr>
                    294: <tr><td>
                    295: <table>
                    296: <tr>
                    297: <td>Scan in Barcode</td>
1.120     www       298: <td><input type="text" size="22" name="barcode" 
                    299: onChange="updatetoken()"/></td>
1.119     www       300: </tr>
                    301: <tr><td><i>or</i> Type in DocID</td>
                    302: <td>
                    303: <input type="text" size="5" name="codeone" />
1.120     www       304: <b><font size="+2">*</font></b>
1.119     www       305: <input type="text" size="5" name="codetwo" />
1.120     www       306: <b><font size="+2">*</font></b>
                    307: <input type="text" size="10" name="codethree" value="$defhost" 
                    308: onChange="this.value=this.value.toUpperCase()" />
1.119     www       309: </td></tr>
                    310: </table>
                    311: </td></tr>
                    312: <tr><td><input type="submit" value="Check in DocID" /></td></tr>
                    313: </table>
                    314: </form>
                    315: ENDINPUTFIELD
1.112     www       316: }
                    317: 
1.116     www       318: sub maketoken {
1.118     www       319:     my ($symb,$tuname,$tudom,$tcrsid)=@_;
1.112     www       320:     unless ($symb) {
                    321: 	$symb=&Apache::lonnet::symbread();
                    322:     }
                    323:     unless ($tuname) {
                    324: 	$tuname=$ENV{'user.name'};
                    325:         $tudom=$ENV{'user.domain'};
                    326:         $tcrsid=$ENV{'request.course.id'};
                    327:     }
1.116     www       328: 
1.118     www       329:     return &Apache::lonnet::checkout($symb,$tuname,$tudom,$tcrsid);
                    330: }
                    331: 
                    332: sub printtokenheader {
1.133     albertel  333:     my ($target,$token,$tsymb,$tcrsid,$tudom,$tuname)=@_;
1.116     www       334:     unless ($token) { return ''; }
1.118     www       335: 
1.133     albertel  336:     my ($symb,$courseid,$domain,$name) = &Apache::lonxml::whichuser();
                    337:     unless ($tsymb) {
                    338: 	$tsymb=$symb;
1.118     www       339:     }
                    340:     unless ($tuname) {
1.133     albertel  341: 	$tuname=$name;
                    342:         $tudom=$domain;
                    343:         $tcrsid=$courseid;
1.118     www       344:     }
1.114     www       345: 
                    346:     my %reply=&Apache::lonnet::get('environment',
                    347:               ['firstname','middlename','lastname','generation'],
                    348:               $tudom,$tuname);
                    349:     my $plainname=$reply{'firstname'}.' '. 
                    350:                   $reply{'middlename'}.' '.
                    351:                   $reply{'lastname'}.' '.
                    352: 		  $reply{'generation'};
                    353: 
1.112     www       354:     if ($target eq 'web') {
1.145     www       355:         my %idhash=&Apache::lonnet::idrget($tudom,($tuname));
1.115     www       356: 	return 
1.221     albertel  357:  '<img align="right" src="/cgi-bin/barcode.png?encode='.$token.'" />'.
1.115     www       358:                'Checked out for '.$plainname.
1.114     www       359:                '<br />User: '.$tuname.' at '.$tudom.
1.145     www       360: 	       '<br />ID: '.$idhash{$tuname}.
1.117     www       361: 	       '<br />CourseID: '.$tcrsid.
1.145     www       362: 	       '<br />Course: '.$ENV{'course.'.$tcrsid.'.description'}.
1.114     www       363:                '<br />DocID: '.$token.
1.116     www       364:                '<br />Time: '.localtime().'<hr />';
1.112     www       365:     } else {
1.121     albertel  366:         return $token;
1.112     www       367:     }
1.68      www       368: }
                    369: 
1.70      www       370: sub fontsettings() {
                    371:     my $headerstring='';
                    372:     if (($ENV{'browser.os'} eq 'mac') && (!$ENV{'browser.mathml'})) { 
                    373:          $headerstring.=
                    374:              '<meta Content-Type="text/html; charset=x-mac-roman">';
                    375:     }
                    376:     return $headerstring;
1.68      www       377: }
                    378: 
1.48      albertel  379: sub printalltags {
                    380:   my $temp;
                    381:   foreach $temp (sort keys %Apache::lonxml::alltags) {
1.141     albertel  382:     &Apache::lonxml::debug("$temp -- ".
                    383: 		  join(',',@{ $Apache::lonxml::alltags{$temp} }));
1.48      albertel  384:   }
                    385: }
1.31      sakharuk  386: 
1.3       sakharuk  387: sub xmlparse {
1.172     albertel  388:  my ($request,$target,$content_file_string,$safeinit,%style_for_target) = @_;
1.96      albertel  389: 
1.172     albertel  390:  &setup_globals($request,$target);
1.232     albertel  391:  &Apache::inputtags::initialize_inputtags();
                    392:  &Apache::outputtags::initialize_outputtags();
                    393:  &Apache::edit::initialize_edit();
1.178     www       394: #
                    395: # do we have a course style file?
                    396: #
                    397: 
1.208     albertel  398:  if ($ENV{'request.course.id'} && $ENV{'request.state'} ne 'construct') {
1.178     www       399:      my $bodytext=
                    400: 	 $ENV{'course.'.$ENV{'request.course.id'}.'.default_xml_style'};
                    401:      if ($bodytext) {
                    402:        my $location=&Apache::lonnet::filelocation('',$bodytext);
                    403:        my $styletext=&Apache::lonnet::getfile($location);
                    404:        if ($styletext ne '-1') {
                    405:           %style_for_target = (%style_for_target,
                    406:                           &Apache::style::styleparser($target,$styletext));
                    407:        }
                    408:     }
                    409:  }
                    410: 
1.48      albertel  411:  #&printalltags();
1.16      albertel  412:  my @pars = ();
1.23      albertel  413:  my $pwd=$ENV{'request.filename'};
                    414:  $pwd =~ s:/[^/]*$::;
                    415:  &newparser(\@pars,\$content_file_string,$pwd);
1.24      sakharuk  416: 
1.3       sakharuk  417:  my $safeeval = new Safe;
1.40      albertel  418:  my $safehole = new Safe::Hole;
1.82      ng        419:  &init_safespace($target,$safeeval,$safehole,$safeinit);
1.3       sakharuk  420: #-------------------- Redefinition of the target in the case of compound target
                    421: 
                    422:  ($target, my @tenta) = split('&&',$target);
                    423: 
1.150     albertel  424:  my @stack = ();
1.3       sakharuk  425:  my @parstack = ();
1.17      albertel  426:  &initdepth;
1.67      www       427: 
1.101     albertel  428:  my $finaloutput = &inner_xmlparse($target,\@stack,\@parstack,\@pars,
                    429: 				   $safeeval,\%style_for_target);
1.125     www       430:  if ($ENV{'request.uri'}) {
                    431:     &writeallows($ENV{'request.uri'});
                    432:  }
1.204     albertel  433:  if ($Apache::lonxml::counter_changed) { &store_counter() }
1.3       sakharuk  434:  return $finaloutput;
1.106     www       435: }
                    436: 
                    437: sub htmlclean {
1.107     www       438:     my ($raw,$full)=@_;
1.106     www       439: 
                    440:     my $tree = HTML::TreeBuilder->new;
                    441:     $tree->ignore_unknown(0);
1.140     albertel  442: 
1.106     www       443:     $tree->parse($raw);
                    444: 
1.107     www       445:     my $output= $tree->as_HTML(undef,' ');
1.140     albertel  446: 
1.161     albertel  447:     $output=~s/\<(br|hr|img|meta|allow)(.*?)\>/\<$1$2 \/\>/gis;
1.111     www       448:     $output=~s/\<\/(br|hr|img|meta|allow)\>//gis;
1.107     www       449:     unless ($full) {
                    450:        $output=~s/\<[\/]*(body|head|html)\>//gis;
                    451:     }
1.106     www       452: 
                    453:     $tree = $tree->delete;
                    454: 
                    455:     return $output;
1.15      albertel  456: }
                    457: 
1.191     albertel  458: sub latex_special_symbols {
1.229     sakharuk  459:     my ($current_token,$stack,$parstack,$where)=@_;
1.235     sakharuk  460:     if ($where eq 'header') {
1.238   ! albertel  461: 	$current_token =~ s/(\\|_|\^)/ /g;
        !           462: 	$current_token =~ s/(\$|%|\#|&|\{|\})/\\$1/g;
1.229     sakharuk  463:     } else {
1.238   ! albertel  464: 	$current_token=~s/\\ /\\char92 /g;
        !           465: 	$current_token=~s/\^/\\char94 /g;
        !           466: 	$current_token=~s/\~/\\char126 /g;
        !           467: 	$current_token=~s/(&[^a-z\#])/\\$1/g;
        !           468: 	$current_token=~s/([^&])\#/$1\\#/g;
        !           469: 	$current_token=~s/(\$|_|{|})/\\$1/g;
        !           470: 	$current_token=~s/\\char92 /\\texttt{\\char92}/g;
        !           471: 	$current_token=~s/(>|<)/\$$1\$/g; #more or less
        !           472: 	if ($current_token=~m/\d%/) {$current_token =~ s/(\d)%/$1\\%/g;} #percent after digit
        !           473: 	if ($current_token=~m/\s%/) {$current_token =~ s/(\s)%/$1\\%/g;} #persent after space
1.229     sakharuk  474:     }
1.188     sakharuk  475:     return $current_token;
                    476: }
                    477: 
1.101     albertel  478: sub inner_xmlparse {
                    479:   my ($target,$stack,$parstack,$pars,$safeeval,$style_for_target)=@_;
                    480:   my $finaloutput = '';
                    481:   my $result;
                    482:   my $token;
                    483:   while ( $#$pars > -1 ) {
                    484:     while ($token = $$pars['-1']->get_token) {
                    485:       if (($token->[0] eq 'T') || ($token->[0] eq 'C') || ($token->[0] eq 'D') ) {
                    486: 	if ($metamode<1) {
1.190     albertel  487: 	    my $text=$token->[1];
1.193     albertel  488: 	    if ($token->[0] eq 'C' && $target eq 'tex') {
1.216     sakharuk  489: 		$text = '%'.$text."\n";
1.182     sakharuk  490: 	    }
1.190     albertel  491: 	    $result.=$text;
1.101     albertel  492: 	}
                    493:       } elsif ($token->[0] eq 'PI') {
                    494: 	if ($metamode<1) {
                    495: 	  $result=$token->[2];
                    496: 	}
                    497:       } elsif ($token->[0] eq 'S') {
1.140     albertel  498: 	# add tag to stack
1.101     albertel  499: 	push (@$stack,$token->[1]);
                    500: 	# add parameters list to another stack
                    501: 	push (@$parstack,&parstring($token));
1.140     albertel  502: 	&increasedepth($token);
1.212     albertel  503: 	if ($Apache::lonxml::usestyle &&
                    504: 	    exists($$style_for_target{$token->[1]})) {
                    505: 	    $Apache::lonxml::usestyle=0;
                    506: 	    my $string=$$style_for_target{$token->[1]}.
                    507: 	      '<LONCAPA_INTERNAL_TURN_STYLE_ON />';
                    508: 	    &Apache::lonxml::newparser($pars,\$string);
1.101     albertel  509: 	} else {
                    510: 	  $result = &callsub("start_$token->[1]", $target, $token, $stack,
                    511: 			     $parstack, $pars, $safeeval, $style_for_target);
1.140     albertel  512: 	}
1.101     albertel  513:       } elsif ($token->[0] eq 'E') {
                    514: 	#clear out any tags that didn't end
                    515: 	while ($token->[1] ne $$stack['-1'] && ($#$stack > -1)) {
1.150     albertel  516: 	  my $lasttag=$$stack[-1];
                    517: 	  if ($token->[1] =~ /^$lasttag$/i) {
                    518: 	    &Apache::lonxml::warning('Using tag &lt;/'.$token->[1].'&gt; as end tag to &lt;'.$$stack[-1].'&gt;');
                    519: 	    last;
                    520: 	  } else {
1.152     albertel  521: 	    &Apache::lonxml::warning('Found tag &lt;/'.$token->[1].'&gt; when looking for &lt;/'.$$stack[-1].'&gt; in file');
1.150     albertel  522: 	    &end_tag($stack,$parstack,$token);
                    523: 	  }
1.101     albertel  524: 	}
1.140     albertel  525: 
1.212     albertel  526: 	if ($Apache::lonxml::usestyle &&
                    527: 	    exists($$style_for_target{'/'."$token->[1]"})) {
                    528: 	    $Apache::lonxml::usestyle=0;
                    529: 	    my $string=$$style_for_target{'/'.$token->[1]}.
                    530: 	      '<LONCAPA_INTERNAL_TURN_STYLE_ON />';
                    531: 	    &Apache::lonxml::newparser($pars,\$string);
1.101     albertel  532: 	} else {
                    533: 	  $result = &callsub("end_$token->[1]", $target, $token, $stack,
                    534: 			     $parstack, $pars,$safeeval, $style_for_target);
                    535: 	}
                    536:       } else {
                    537: 	&Apache::lonxml::error("Unknown token event :$token->[0]:$token->[1]:");
                    538:       }
                    539:       #evaluate variable refs in result
                    540:       if ($result ne "") {
                    541: 	if ( $#$parstack > -1 ) {
1.169     albertel  542: 	  $result=&Apache::run::evaluate($result,$safeeval,$$parstack[-1]);
1.101     albertel  543: 	} else {
1.169     albertel  544: 	  $result= &Apache::run::evaluate($result,$safeeval,'');
1.101     albertel  545: 	}
1.163     albertel  546:       }
1.190     albertel  547:       if (($token->[0] eq 'T') || ($token->[0] eq 'C') || ($token->[0] eq 'D') ) {
                    548: 	if ($target eq 'tex') {
1.191     albertel  549: 	    $result=&latex_special_symbols($result,$stack,$parstack);
1.190     albertel  550: 	}
                    551:       }
                    552: 
1.169     albertel  553:       # Encode any high ASCII characters
                    554:       if (!$Apache::lonxml::prevent_entity_encode) {
                    555: 	$result=&HTML::Entities::encode($result,"\200-\377");
                    556:       }
                    557:       if ($Apache::lonxml::redirection) {
                    558: 	$Apache::lonxml::outputstack['-1'] .= $result;
                    559:       } else {
                    560: 	$finaloutput.=$result;
                    561:       }
                    562:       $result = '';
                    563: 
1.101     albertel  564:       if ($token->[0] eq 'E') { 
                    565: 	&end_tag($stack,$parstack,$token);
                    566:       }
1.224     albertel  567:     }	
1.212     albertel  568:     if ($#$pars > -1) {
                    569: 	pop @$pars;
                    570: 	pop @Apache::lonxml::pwd;
                    571:     }
1.101     albertel  572:   }
                    573: 
                    574:   # if ($target eq 'meta') {
                    575:   #   $finaloutput.=&endredirection;
                    576:   # }
                    577: 
1.169     albertel  578: 
1.101     albertel  579:   if (($ENV{'QUERY_STRING'}) && ($target eq 'web')) {
                    580:     $finaloutput=&afterburn($finaloutput);
1.216     sakharuk  581:   }	    
1.101     albertel  582:   return $finaloutput;
                    583: }
1.67      www       584: 
1.7       albertel  585: sub callsub {
1.84      albertel  586:   my ($sub,$target,$token,$tagstack,$parstack,$parser,$safeeval,$style)=@_;
1.7       albertel  587:   my $currentstring='';
1.72      albertel  588:   my $nodefault;
1.7       albertel  589:   {
1.59      albertel  590:     my $sub1;
1.7       albertel  591:     no strict 'refs';
1.68      www       592:     my $tag=$token->[1];
1.236     www       593: # get utterly rid of extended html tags
                    594:     if ($tag=~/^x\-/i) { return ''; }
1.141     albertel  595:     my $space=$Apache::lonxml::alltags{$tag}[-1];
1.68      www       596:     if (!$space) {
1.141     albertel  597:      	$tag=~tr/A-Z/a-z/;
1.68      www       598: 	$sub=~tr/A-Z/a-z/;
1.141     albertel  599: 	$space=$Apache::lonxml::alltags{$tag}[-1]
1.68      www       600:     }
1.97      albertel  601: 
                    602:     my $deleted=0;
                    603:     $Apache::lonxml::curdepth=join('_',@Apache::lonxml::depthcounter);
                    604:     if (($token->[0] eq 'S') && ($target eq 'modified')) {
                    605:       $deleted=&Apache::edit::handle_delete($space,$target,$token,$tagstack,
                    606: 					     $parstack,$parser,$safeeval,
                    607: 					     $style);
                    608:     }
                    609:     if (!$deleted) {
                    610:       if ($space) {
1.220     albertel  611: 	#&Apache::lonxml::debug("Calling sub $sub in $space $metamode");
1.97      albertel  612: 	$sub1="$space\:\:$sub";
                    613: 	($currentstring,$nodefault) = &$sub1($target,$token,$tagstack,
                    614: 					     $parstack,$parser,$safeeval,
                    615: 					     $style);
                    616:       } else {
1.220     albertel  617: 	#&Apache::lonxml::debug("NOT Calling sub $sub in $space $metamode");
1.97      albertel  618: 	if ($metamode <1) {
                    619: 	  if (defined($token->[4]) && ($metamode < 1)) {
                    620: 	    $currentstring = $token->[4];
                    621: 	  } else {
                    622: 	    $currentstring = $token->[2];
                    623: 	  }
1.62      sakharuk  624: 	}
1.7       albertel  625:       }
1.97      albertel  626:       #    &Apache::lonxml::debug("nodefalt:$nodefault:");
                    627:       if ($currentstring eq '' && $nodefault eq '') {
                    628: 	if ($target eq 'edit') {
1.220     albertel  629: 	  #&Apache::lonxml::debug("doing default edit for $token->[1]");
1.97      albertel  630: 	  if ($token->[0] eq 'S') {
                    631: 	    $currentstring = &Apache::edit::tag_start($target,$token);
                    632: 	  } elsif ($token->[0] eq 'E') {
                    633: 	    $currentstring = &Apache::edit::tag_end($target,$token);
                    634: 	  }
                    635: 	} elsif ($target eq 'modified') {
                    636: 	  if ($token->[0] eq 'S') {
                    637: 	    $currentstring = $token->[4];
                    638: 	    $currentstring.=&Apache::edit::handle_insert();
1.210     www       639: 	  } elsif ($token->[0] eq 'E') {
                    640: 	    $currentstring = $token->[2];
                    641:             $currentstring.=&Apache::edit::handle_insertafter($token->[1]);
1.97      albertel  642: 	  } else {
                    643: 	    $currentstring = $token->[2];
                    644: 	  }
1.72      albertel  645: 	}
                    646:       }
1.7       albertel  647:     }
                    648:     use strict 'refs';
                    649:   }
                    650:   return $currentstring;
1.82      ng        651: }
                    652: 
1.96      albertel  653: sub setup_globals {
1.172     albertel  654:   my ($request,$target)=@_;
                    655:   $Apache::lonxml::request=$request;
1.99      albertel  656:   $Apache::lonxml::registered = 0;
1.205     www       657:   $errorcount=0;
                    658:   $warningcount=0;
1.207     albertel  659:   $Apache::lonxml::default_homework_loaded=0;
1.212     albertel  660:   $Apache::lonxml::usestyle=1;
1.204     albertel  661:   &init_counter();
1.101     albertel  662:   @Apache::lonxml::pwd=();
1.124     albertel  663:   @Apache::lonxml::extlinks=();
1.96      albertel  664:   if ($target eq 'meta') {
                    665:     $Apache::lonxml::redirection = 0;
                    666:     $Apache::lonxml::metamode = 1;
                    667:     $Apache::lonxml::evaluate = 1;
                    668:     $Apache::lonxml::import = 0;
1.129     albertel  669:   } elsif ($target eq 'answer') {
                    670:     $Apache::lonxml::redirection = 0;
                    671:     $Apache::lonxml::metamode = 1;
                    672:     $Apache::lonxml::evaluate = 1;
                    673:     $Apache::lonxml::import = 1;
1.96      albertel  674:   } elsif ($target eq 'grade') {
                    675:     &startredirection;
                    676:     $Apache::lonxml::metamode = 0;
                    677:     $Apache::lonxml::evaluate = 1;
                    678:     $Apache::lonxml::import = 1;
                    679:   } elsif ($target eq 'modified') {
                    680:     $Apache::lonxml::redirection = 0;
                    681:     $Apache::lonxml::metamode = 0;
                    682:     $Apache::lonxml::evaluate = 0;
                    683:     $Apache::lonxml::import = 0;
                    684:   } elsif ($target eq 'edit') {
                    685:     $Apache::lonxml::redirection = 0;
                    686:     $Apache::lonxml::metamode = 0;
                    687:     $Apache::lonxml::evaluate = 0;
                    688:     $Apache::lonxml::import = 0;
1.163     albertel  689:   } elsif ($target eq 'analyze') {
                    690:     $Apache::lonxml::redirection = 0;
                    691:     $Apache::lonxml::metamode = 0;
                    692:     $Apache::lonxml::evaluate = 1;
                    693:     $Apache::lonxml::import = 1;
1.96      albertel  694:   } else {
                    695:     $Apache::lonxml::redirection = 0;
                    696:     $Apache::lonxml::metamode = 0;
                    697:     $Apache::lonxml::evaluate = 1;
                    698:     $Apache::lonxml::import = 1;
                    699:   }
                    700: }
                    701: 
1.82      ng        702: sub init_safespace {
                    703:   my ($target,$safeeval,$safehole,$safeinit) = @_;
                    704:   $safeeval->permit("entereval");
                    705:   $safeeval->permit(":base_math");
                    706:   $safeeval->permit("sort");
                    707:   $safeeval->deny(":base_io");
1.102     albertel  708:   $safehole->wrap(\&Apache::scripttag::xmlparse,$safeeval,'&xmlparse');
1.82      ng        709:   $safehole->wrap(\&Apache::lonnet::EXT,$safeeval,'&EXT');
                    710:   
                    711:   $safehole->wrap(\&Math::Cephes::asin,$safeeval,'&asin');
                    712:   $safehole->wrap(\&Math::Cephes::acos,$safeeval,'&acos');
                    713:   $safehole->wrap(\&Math::Cephes::atan,$safeeval,'&atan');
                    714:   $safehole->wrap(\&Math::Cephes::sinh,$safeeval,'&sinh');
                    715:   $safehole->wrap(\&Math::Cephes::cosh,$safeeval,'&cosh');
                    716:   $safehole->wrap(\&Math::Cephes::tanh,$safeeval,'&tanh');
                    717:   $safehole->wrap(\&Math::Cephes::asinh,$safeeval,'&asinh');
                    718:   $safehole->wrap(\&Math::Cephes::acosh,$safeeval,'&acosh');
                    719:   $safehole->wrap(\&Math::Cephes::atanh,$safeeval,'&atanh');
                    720:   $safehole->wrap(\&Math::Cephes::erf,$safeeval,'&erf');
                    721:   $safehole->wrap(\&Math::Cephes::erfc,$safeeval,'&erfc');
                    722:   $safehole->wrap(\&Math::Cephes::j0,$safeeval,'&j0');
                    723:   $safehole->wrap(\&Math::Cephes::j1,$safeeval,'&j1');
                    724:   $safehole->wrap(\&Math::Cephes::jn,$safeeval,'&jn');
                    725:   $safehole->wrap(\&Math::Cephes::jv,$safeeval,'&jv');
                    726:   $safehole->wrap(\&Math::Cephes::y0,$safeeval,'&y0');
                    727:   $safehole->wrap(\&Math::Cephes::y1,$safeeval,'&y1');
                    728:   $safehole->wrap(\&Math::Cephes::yn,$safeeval,'&yn');
                    729:   $safehole->wrap(\&Math::Cephes::yv,$safeeval,'&yv');
1.215     albertel  730:   
                    731:   $safehole->wrap(\&Math::Cephes::bdtr  ,$safeeval,'&bdtr'  );
                    732:   $safehole->wrap(\&Math::Cephes::bdtrc ,$safeeval,'&bdtrc' );
                    733:   $safehole->wrap(\&Math::Cephes::bdtri ,$safeeval,'&bdtri' );
                    734:   $safehole->wrap(\&Math::Cephes::btdtr ,$safeeval,'&btdtr' );
                    735:   $safehole->wrap(\&Math::Cephes::chdtr ,$safeeval,'&chdtr' );
                    736:   $safehole->wrap(\&Math::Cephes::chdtrc,$safeeval,'&chdtrc');
                    737:   $safehole->wrap(\&Math::Cephes::chdtri,$safeeval,'&chdtri');
                    738:   $safehole->wrap(\&Math::Cephes::fdtr  ,$safeeval,'&fdtr'  );
                    739:   $safehole->wrap(\&Math::Cephes::fdtrc ,$safeeval,'&fdtrc' );
                    740:   $safehole->wrap(\&Math::Cephes::fdtri ,$safeeval,'&fdtri' );
                    741:   $safehole->wrap(\&Math::Cephes::gdtr  ,$safeeval,'&gdtr'  );
                    742:   $safehole->wrap(\&Math::Cephes::gdtrc ,$safeeval,'&gdtrc' );
                    743:   $safehole->wrap(\&Math::Cephes::nbdtr ,$safeeval,'&nbdtr' );
                    744:   $safehole->wrap(\&Math::Cephes::nbdtrc,$safeeval,'&nbdtrc');
                    745:   $safehole->wrap(\&Math::Cephes::nbdtri,$safeeval,'&nbdtri');
                    746:   $safehole->wrap(\&Math::Cephes::ndtr  ,$safeeval,'&ndtr'  );
                    747:   $safehole->wrap(\&Math::Cephes::ndtri ,$safeeval,'&ndtri' );
                    748:   $safehole->wrap(\&Math::Cephes::pdtr  ,$safeeval,'&pdtr'  );
                    749:   $safehole->wrap(\&Math::Cephes::pdtrc ,$safeeval,'&pdtrc' );
                    750:   $safehole->wrap(\&Math::Cephes::pdtri ,$safeeval,'&pdtri' );
                    751:   $safehole->wrap(\&Math::Cephes::stdtr ,$safeeval,'&stdtr' );
                    752:   $safehole->wrap(\&Math::Cephes::stdtri,$safeeval,'&stdtri');
                    753: 
                    754: #  $safehole->wrap(\&Math::Cephes::new_fract,$safeeval,'&new_fract');
                    755: #  $safehole->wrap(\&Math::Cephes::radd,$safeeval,'&radd');
                    756: #  $safehole->wrap(\&Math::Cephes::rsub,$safeeval,'&rsub');
                    757: #  $safehole->wrap(\&Math::Cephes::rmul,$safeeval,'&rmul');
                    758: #  $safehole->wrap(\&Math::Cephes::rdiv,$safeeval,'&rdiv');
                    759: #  $safehole->wrap(\&Math::Cephes::euclid,$safeeval,'&euclid');
                    760: 
1.91      ng        761:   $safehole->wrap(\&Math::Random::random_beta,$safeeval,'&math_random_beta');
                    762:   $safehole->wrap(\&Math::Random::random_chi_square,$safeeval,'&math_random_chi_square');
                    763:   $safehole->wrap(\&Math::Random::random_exponential,$safeeval,'&math_random_exponential');
                    764:   $safehole->wrap(\&Math::Random::random_f,$safeeval,'&math_random_f');
                    765:   $safehole->wrap(\&Math::Random::random_gamma,$safeeval,'&math_random_gamma');
                    766:   $safehole->wrap(\&Math::Random::random_multivariate_normal,$safeeval,'&math_random_multivariate_normal');
                    767:   $safehole->wrap(\&Math::Random::random_multinomial,$safeeval,'&math_random_multinomial');
                    768:   $safehole->wrap(\&Math::Random::random_noncentral_chi_square,$safeeval,'&math_random_noncentral_chi_square');
                    769:   $safehole->wrap(\&Math::Random::random_noncentral_f,$safeeval,'&math_random_noncentral_f');
                    770:   $safehole->wrap(\&Math::Random::random_normal,$safeeval,'&math_random_normal');
                    771:   $safehole->wrap(\&Math::Random::random_permutation,$safeeval,'&math_random_permutation');
1.93      ng        772:   $safehole->wrap(\&Math::Random::random_permuted_index,$safeeval,'&math_random_permuted_index');
1.91      ng        773:   $safehole->wrap(\&Math::Random::random_uniform,$safeeval,'&math_random_uniform');
                    774:   $safehole->wrap(\&Math::Random::random_poisson,$safeeval,'&math_random_poisson');
                    775:   $safehole->wrap(\&Math::Random::random_uniform_integer,$safeeval,'&math_random_uniform_integer');
                    776:   $safehole->wrap(\&Math::Random::random_negative_binomial,$safeeval,'&math_random_negative_binomial');
                    777:   $safehole->wrap(\&Math::Random::random_binomial,$safeeval,'&math_random_binomial');
                    778:   $safehole->wrap(\&Math::Random::random_seed_from_phrase,$safeeval,'&random_seed_from_phrase');
                    779:   $safehole->wrap(\&Math::Random::random_set_seed_from_phrase,$safeeval,'&random_set_seed_from_phrase');
                    780:   $safehole->wrap(\&Math::Random::random_get_seed,$safeeval,'&random_get_seed');
                    781:   $safehole->wrap(\&Math::Random::random_set_seed,$safeeval,'&random_set_seed');
                    782: 
1.82      ng        783: #need to inspect this class of ops
                    784: # $safeeval->deny(":base_orig");
1.91      ng        785:   $safeinit .= ';$external::target="'.$target.'";';
1.121     albertel  786:   my $rndseed;
1.123     albertel  787:   my ($symb,$courseid,$domain,$name) = &Apache::lonxml::whichuser();
                    788:   $rndseed=&Apache::lonnet::rndseed($symb,$courseid,$domain,$name);
1.121     albertel  789:   $safeinit .= ';$external::randomseed='.$rndseed.';';
1.82      ng        790:   &Apache::run::run($safeinit,$safeeval);
1.207     albertel  791: }
                    792: 
                    793: sub default_homework_load {
                    794:     my ($safeeval)=@_;
                    795:     &Apache::lonxml::debug('Loading default_homework');
                    796:     my $default=&Apache::lonnet::getfile('/home/httpd/html/res/adm/includes/default_homework.lcpm');
                    797:     if ($default == -1) {
                    798: 	&Apache::lonxml::error("<b>Unable to find <i>default_homework.lcpm</i></b>");
                    799:     } else {
                    800: 	&Apache::run::run($default,$safeeval);
                    801: 	$Apache::lonxml::default_homework_loaded=1;
                    802:     }
1.17      albertel  803: }
                    804: 
1.55      albertel  805: sub startredirection {
                    806:   $Apache::lonxml::redirection++;
                    807:   push (@Apache::lonxml::outputstack, '');
                    808: }
                    809: 
                    810: sub endredirection {
                    811:   if (!$Apache::lonxml::redirection) {
1.72      albertel  812:     &Apache::lonxml::error("Endredirection was called, before a startredirection, perhaps you have unbalanced tags. Some debuging information:".join ":",caller);
1.55      albertel  813:     return '';
                    814:   }
                    815:   $Apache::lonxml::redirection--;
                    816:   pop @Apache::lonxml::outputstack;
1.97      albertel  817: }
                    818: 
                    819: sub end_tag {
                    820:   my ($tagstack,$parstack,$token)=@_;
                    821:   pop(@$tagstack);
                    822:   pop(@$parstack);
                    823:   &decreasedepth($token);
1.55      albertel  824: }
                    825: 
1.17      albertel  826: sub initdepth {
                    827:   @Apache::lonxml::depthcounter=();
                    828:   $Apache::lonxml::depth=-1;
                    829:   $Apache::lonxml::olddepth=-1;
                    830: }
                    831: 
                    832: sub increasedepth {
1.19      albertel  833:   my ($token) = @_;
1.17      albertel  834:   $Apache::lonxml::depth++;
                    835:   $Apache::lonxml::depthcounter[$Apache::lonxml::depth]++;
                    836:   if ($Apache::lonxml::depthcounter[$Apache::lonxml::depth]==1) {
                    837:     $Apache::lonxml::olddepth=$Apache::lonxml::depth;
                    838:   }
1.42      albertel  839:   my $curdepth=join('_',@Apache::lonxml::depthcounter);
1.64      albertel  840:   &Apache::lonxml::debug("s $Apache::lonxml::depth : $Apache::lonxml::olddepth : $curdepth : $token->[1]\n");
1.54      albertel  841: #print "<br />s $Apache::lonxml::depth : $Apache::lonxml::olddepth : $curdepth : $token->[1]\n";
1.17      albertel  842: }
                    843: 
                    844: sub decreasedepth {
1.19      albertel  845:   my ($token) = @_;
1.17      albertel  846:   $Apache::lonxml::depth--;
1.36      albertel  847:   if ($Apache::lonxml::depth<$Apache::lonxml::olddepth-1) {
                    848:     $#Apache::lonxml::depthcounter--;
                    849:     $Apache::lonxml::olddepth=$Apache::lonxml::depth+1;
                    850:   }
1.43      albertel  851:   if (  $Apache::lonxml::depth < -1) {
1.140     albertel  852:     &Apache::lonxml::warning("Missing tags, unable to properly run file.");
1.43      albertel  853:     $Apache::lonxml::depth='-1';
                    854:   }
1.42      albertel  855:   my $curdepth=join('_',@Apache::lonxml::depthcounter);
1.64      albertel  856:   &Apache::lonxml::debug("e $Apache::lonxml::depth : $Apache::lonxml::olddepth : $token->[1] : $curdepth\n");
1.54      albertel  857: #print "<br />e $Apache::lonxml::depth : $Apache::lonxml::olddepth : $token->[1] : $curdepth\n";
1.1       sakharuk  858: }
1.19      albertel  859: 
1.180     albertel  860: sub get_all_text_unbalanced {
1.190     albertel  861: #there is a copy of this in lonpublisher.pm
1.180     albertel  862:  my($tag,$pars)= @_;
                    863:  my $token;
                    864:  my $result='';
                    865:  $tag='<'.$tag.'>';
                    866:  while ($token = $$pars[-1]->get_token) {
                    867:    if (($token->[0] eq 'T')||($token->[0] eq 'C')||($token->[0] eq 'D')) {
                    868:      $result.=$token->[1];
                    869:    } elsif ($token->[0] eq 'PI') {
                    870:      $result.=$token->[2];
                    871:    } elsif ($token->[0] eq 'S') {
                    872:      $result.=$token->[4];
                    873:    } elsif ($token->[0] eq 'E')  {
                    874:      $result.=$token->[2];
                    875:    }
1.211     albertel  876:    if ($result =~ /(.*)\Q$tag\E(.*)/s) {
1.180     albertel  877:      &Apache::lonxml::debug('Got a winner with leftovers ::'.$2);
                    878:      &Apache::lonxml::debug('Result is :'.$1);
                    879:      $result=$1;
                    880:      my $redo=$tag.$2;
                    881:      &Apache::lonxml::newparser($pars,\$redo);
                    882:      last;
                    883:    }
                    884:  }
                    885:  return $result
1.204     albertel  886: }
                    887: 
                    888: sub increment_counter {
                    889:     $Apache::lonxml::counter++;
                    890:     $Apache::lonxml::counter_changed=1;
                    891: }
                    892: 
                    893: sub init_counter {
                    894:     if (defined($ENV{'form.counter'})) {
                    895: 	$Apache::lonxml::counter=$ENV{'form.counter'};
1.237     sakharuk  896:     } else {
1.204     albertel  897: 	$Apache::lonxml::counter=1;
                    898: 	&store_counter();
                    899:     }
                    900:     $Apache::lonxml::counter_changed=0;
                    901: }
                    902: 
                    903: sub store_counter {
                    904:     &Apache::lonnet::appenv(('form.counter' => $Apache::lonxml::counter));
                    905:     return '';
1.180     albertel  906: }
                    907: 
1.19      albertel  908: sub get_all_text {
                    909:  my($tag,$pars)= @_;
1.212     albertel  910:  &Apache::lonxml::debug("Got a ".ref($pars));
1.224     albertel  911:  my $gotfullstack=1;
1.212     albertel  912:  if (ref($pars) ne 'ARRAY') {
1.224     albertel  913:      $gotfullstack=0;
1.212     albertel  914:      $pars=[$pars];
                    915:  }
1.19      albertel  916:  my $depth=0;
                    917:  my $token;
                    918:  my $result='';
1.57      albertel  919:  if ( $tag =~ m:^/: ) { 
                    920:    my $tag=substr($tag,1); 
1.212     albertel  921:    #&Apache::lonxml::debug("have:$tag:");
1.223     albertel  922:    my $top_empty=0;
                    923:    while (($depth >=0) && ($#$pars > -1) && (!$top_empty)) {
1.212     albertel  924:      while (($depth >=0) && ($token = $$pars[-1]->get_token)) {
                    925:        #&Apache::lonxml::debug("e token:$token->[0]:$depth:$token->[1]:".$#$pars.":".$#Apache::lonxml::pwd);
                    926:        if (($token->[0] eq 'T')||($token->[0] eq 'C')||($token->[0] eq 'D')) {
                    927: 	 $result.=$token->[1];
                    928:        } elsif ($token->[0] eq 'PI') {
                    929: 	 $result.=$token->[2];
                    930:        } elsif ($token->[0] eq 'S') {
                    931: 	 if ($token->[1] =~ /^$tag$/i) { $depth++; }
                    932: 	 $result.=$token->[4];
                    933:        } elsif ($token->[0] eq 'E')  {
                    934: 	 if ( $token->[1] =~ /^$tag$/i) { $depth--; }
                    935: 	 #skip sending back the last end tag
                    936: 	 if ($depth > -1) { $result.=$token->[2]; } else {
                    937: 	   $$pars[-1]->unget_token($token);
                    938: 	 }
1.57      albertel  939:        }
                    940:      }
1.228     albertel  941:      if (($depth >=0) && ($#$pars == 0) ) { $top_empty=1; }
1.212     albertel  942:      if (($depth >=0) && ($#$pars > 0) ) {
                    943:        pop(@$pars);
                    944:        pop(@Apache::lonxml::pwd);
                    945:      }
1.224     albertel  946:    }
                    947:    if ($top_empty && $depth >= 0) {
                    948:        #never found the end tag ran out of text, throw error send back blank
                    949:        &error('Never found end tag for &lt;'.$tag.'&gt;');
                    950:        if ($gotfullstack) {
                    951: 	   my $newstring='</'.$tag.'>'.$result;
                    952: 	   &Apache::lonxml::newparser($pars,\$newstring);
                    953:        }
                    954:        $result='';
1.57      albertel  955:    }
                    956:  } else {
1.212     albertel  957:      while ($#$pars > -1) {
                    958: 	 while ($token = $$pars[-1]->get_token) {
                    959: 	     #&Apache::lonxml::debug("s token:$token->[0]:$depth:$token->[1]");
                    960: 	     if (($token->[0] eq 'T')||($token->[0] eq 'C')||
                    961: 		 ($token->[0] eq 'D')) {
                    962: 		 $result.=$token->[1];
                    963: 	     } elsif ($token->[0] eq 'PI') {
                    964: 		 $result.=$token->[2];
                    965: 	     } elsif ($token->[0] eq 'S') {
                    966: 		 if ( $token->[1] =~ /^$tag$/i) {
                    967: 		     $$pars[-1]->unget_token($token); last;
                    968: 		 } else {
                    969: 		     $result.=$token->[4];
                    970: 		 }
                    971: 	     } elsif ($token->[0] eq 'E')  {
                    972: 		 $result.=$token->[2];
                    973: 	     }
                    974: 	 }
                    975: 	 if (($#$pars > 0) ) {
                    976: 	     pop(@$pars);
                    977: 	     pop(@Apache::lonxml::pwd);
                    978: 	 } else { last; }
1.36      albertel  979:      }
1.19      albertel  980:  }
1.212     albertel  981:  if ($result =~ m|<LONCAPA_INTERNAL_TURN_STYLE_ON />|) {
                    982:      $Apache::lonxml::usestyle=1;
                    983:  }
                    984:  #&Apache::lonxml::debug("Exit:$result:");
1.19      albertel  985:  return $result
                    986: }
                    987: 
1.23      albertel  988: sub newparser {
                    989:   my ($parser,$contentref,$dir) = @_;
1.167     albertel  990:   push (@$parser,HTML::LCParser->new($contentref));
1.56      albertel  991:   $$parser['-1']->xml_mode('1');
1.23      albertel  992:   if ( $dir eq '' ) {
                    993:     push (@Apache::lonxml::pwd, $Apache::lonxml::pwd[$#Apache::lonxml::pwd]);
                    994:   } else {
                    995:     push (@Apache::lonxml::pwd, $dir);
                    996:   } 
                    997: #  &Apache::lonxml::debug("pwd:$#Apache::lonxml::pwd");
                    998: #  &Apache::lonxml::debug("pwd:$Apache::lonxml::pwd[$#Apache::lonxml::pwd]");
                    999: }
1.1       sakharuk 1000: 
1.8       albertel 1001: sub parstring {
                   1002:   my ($token) = @_;
                   1003:   my $temp='';
1.142     albertel 1004:   foreach (@{$token->[3]}) {
1.35      www      1005:     unless ($_=~/\W/) {
1.42      albertel 1006:       my $val=$token->[2]->{$_};
1.231     albertel 1007:       $val =~ s/([\%\@\\\"\'])/\\$1/g;
1.51      albertel 1008:       #if ($val =~ m/^[\%\@]/) { $val="\\".$val; }
1.42      albertel 1009:       $temp .= "my \$$_=\"$val\";"
1.20      albertel 1010:     }
1.142     albertel 1011:   }
1.8       albertel 1012:   return $temp;
                   1013: }
1.22      albertel 1014: 
1.34      www      1015: sub writeallows {
1.126     www      1016:     unless ($#extlinks>=0) { return; }
1.34      www      1017:     my $thisurl='/res/'.&Apache::lonnet::declutter(shift);
1.111     www      1018:     if ($ENV{'httpref.'.$thisurl}) {
                   1019: 	$thisurl=$ENV{'httpref.'.$thisurl};
                   1020:     }
1.34      www      1021:     my $thisdir=$thisurl;
                   1022:     $thisdir=~s/\/[^\/]+$//;
                   1023:     my %httpref=();
1.142     albertel 1024:     foreach (@extlinks) {
1.34      www      1025:        $httpref{'httpref.'.
1.125     www      1026:  	        &Apache::lonnet::hreflocation($thisdir,$_)}=$thisurl;
1.142     albertel 1027:     }
1.126     www      1028:     @extlinks=();
1.34      www      1029:     &Apache::lonnet::appenv(%httpref);
                   1030: }
                   1031: 
1.66      www      1032: #
                   1033: # Afterburner handles anchors, highlights and links
                   1034: #
                   1035: sub afterburn {
                   1036:     my $result=shift;
1.154     albertel 1037:     &Apache::loncommon::get_unprocessed_cgi($ENV{'QUERY_STRING'},
                   1038: 					    ['highlight','anchor','link']);
1.66      www      1039:     if ($ENV{'form.highlight'}) {
1.142     albertel 1040:        foreach (split(/\,/,$ENV{'form.highlight'})) {
1.66      www      1041:            my $anchorname=$_;
                   1042: 	   my $matchthis=$anchorname;
                   1043:            $matchthis=~s/\_+/\\s\+/g;
                   1044:            $result=~s/($matchthis)/\<font color=\"red\"\>$1\<\/font\>/gs;
1.142     albertel 1045:        }
1.66      www      1046:     }
                   1047:     if ($ENV{'form.link'}) {
1.142     albertel 1048:        foreach (split(/\,/,$ENV{'form.link'})) {
1.66      www      1049:            my ($anchorname,$linkurl)=split(/\>/,$_);
                   1050: 	   my $matchthis=$anchorname;
                   1051:            $matchthis=~s/\_+/\\s\+/g;
                   1052:            $result=~s/($matchthis)/\<a href=\"$linkurl\"\>$1\<\/a\>/gs;
1.142     albertel 1053:        }
1.66      www      1054:     }
                   1055:     if ($ENV{'form.anchor'}) {
                   1056:         my $anchorname=$ENV{'form.anchor'};
                   1057: 	my $matchthis=$anchorname;
                   1058:         $matchthis=~s/\_+/\\s\+/g;
                   1059:         $result=~s/($matchthis)/\<a name=\"$anchorname\"\>$1\<\/a\>/s;
                   1060:         $result.=(<<"ENDSCRIPT");
1.226     albertel 1061: <script type="text/javascript">
1.66      www      1062:     document.location.hash='$anchorname';
                   1063: </script>
                   1064: ENDSCRIPT
                   1065:     }
                   1066:     return $result;
                   1067: }
                   1068: 
1.79      www      1069: sub storefile {
                   1070:     my ($file,$contents)=@_;
                   1071:     if (my $fh=Apache::File->new('>'.$file)) {
                   1072: 	print $fh $contents;
                   1073:         $fh->close();
1.147     albertel 1074:     } else {
                   1075:       &warning("Unable to save file $file");
1.79      www      1076:     }
                   1077: }
                   1078: 
1.151     albertel 1079: sub createnewhtml {
                   1080:   my $filecontents=(<<SIMPLECONTENT);
1.78      www      1081: <html>
                   1082: <head>
                   1083: <title>
                   1084:                            Title of Document Goes Here
                   1085: </title>
                   1086: </head>
                   1087: <body bgcolor="#FFFFFF">
                   1088: 
                   1089:                            Body of Document Goes Here
                   1090: 
                   1091: </body>
                   1092: </html>
                   1093: SIMPLECONTENT
1.151     albertel 1094:   return $filecontents;
                   1095: }
                   1096: 
1.147     albertel 1097: 
1.151     albertel 1098: sub inserteditinfo {
                   1099:       my ($result,$filecontents)=@_;
1.157     albertel 1100:       $filecontents = &HTML::Entities::encode($filecontents);
1.147     albertel 1101: #      my $editheader='<a href="#editsection">Edit below</a><hr />';
1.161     albertel 1102:       my $buttons=(<<BUTTONS);
                   1103: <input type="submit" name="attemptclean" 
                   1104:        value="Save and then attempt to clean HTML" />
                   1105: <input type="submit" name="savethisfile" value="Save this" />
                   1106: <input type="submit" name="viewmode" value="View" />
                   1107: BUTTONS
1.78      www      1108:       my $editfooter=(<<ENDFOOTER);
                   1109: <hr />
                   1110: <a name="editsection" />
                   1111: <form method="post">
1.161     albertel 1112: <input type="hidden" name="editmode" value="Edit" />
1.170     www      1113: $buttons<br />
1.78      www      1114: <textarea cols="80" rows="40" name="filecont">$filecontents</textarea>
1.170     www      1115: <br />$buttons
1.78      www      1116: <br />
                   1117: </form>
                   1118: ENDFOOTER
1.147     albertel 1119: #      $result=~s/(\<body[^\>]*\>)/$1$editheader/is;
1.78      www      1120:       $result=~s/(\<\/body\>)/$editfooter/is;
                   1121:       return $result;
                   1122: }
                   1123: 
1.152     albertel 1124: sub get_target {
                   1125:   my $viewgrades=&Apache::lonnet::allowed('vgr',$ENV{'request.course.id'});
                   1126:   if ( $ENV{'request.state'} eq 'published') {
                   1127:     if ( defined($ENV{'form.grade_target'})
                   1128: 	 && ($viewgrades == 'F' )) {
                   1129:       return ($ENV{'form.grade_target'});
1.153     albertel 1130:     } elsif (defined($ENV{'form.grade_target'})) {
                   1131:       if (($ENV{'form.grade_target'} eq 'web') ||
                   1132: 	  ($ENV{'form.grade_target'} eq 'tex') ) {
                   1133: 	return $ENV{'form.grade_target'}
                   1134:       } else {
                   1135: 	return 'web';
                   1136:       }
1.152     albertel 1137:     } else {
                   1138:       return 'web';
                   1139:     }
                   1140:   } elsif ($ENV{'request.state'} eq 'construct') {
                   1141:     if ( defined($ENV{'form.grade_target'})) {
                   1142:       return ($ENV{'form.grade_target'});
                   1143:     } else {
                   1144:       return 'web';
                   1145:     }
                   1146:   } else {
                   1147:     return 'web';
                   1148:   }
                   1149: }
                   1150: 
1.24      sakharuk 1151: sub handler {
                   1152:   my $request=shift;
1.68      www      1153: 
1.152     albertel 1154:   my $target=&get_target();
1.68      www      1155: 
1.65      albertel 1156:   $Apache::lonxml::debug=0;
1.68      www      1157: 
1.25      sakharuk 1158:   if ($ENV{'browser.mathml'}) {
1.27      albertel 1159:     $request->content_type('text/xml');
                   1160:   } else {
                   1161:     $request->content_type('text/html');
1.25      sakharuk 1162:   }
1.141     albertel 1163:   &Apache::loncommon::no_cache($request);
1.27      albertel 1164:   $request->send_http_header;
1.141     albertel 1165: 
1.45      www      1166:   return OK if $request->header_only;
1.27      albertel 1167: 
1.79      www      1168: 
                   1169:   my $file=&Apache::lonnet::filelocation("",$request->uri);
1.78      www      1170: #
                   1171: # Edit action? Save file.
                   1172: #
                   1173:   unless ($ENV{'request.state'} eq 'published') {
1.107     www      1174:       if (($ENV{'form.savethisfile'}) || ($ENV{'form.attemptclean'})) {
1.79      www      1175: 	  &storefile($file,$ENV{'form.filecont'});
1.78      www      1176:       }
                   1177:   }
1.24      sakharuk 1178:   my %mystyle;
1.147     albertel 1179:   my $result = '';
1.50      albertel 1180:   my $filecontents=&Apache::lonnet::getfile($file);
                   1181:   if ($filecontents == -1) {
1.78      www      1182:     $result=(<<ENDNOTFOUND);
                   1183: <html>
                   1184: <head>
                   1185: <title>File not found</title>
                   1186: </head>
                   1187: <body bgcolor="#FFFFFF">
                   1188: <b>File not found: $file</b>
                   1189: </body>
                   1190: </html>
                   1191: ENDNOTFOUND
1.50      albertel 1192:     $filecontents='';
1.151     albertel 1193:     if ($ENV{'request.state'} ne 'published') {
                   1194:       $filecontents=&createnewhtml();
1.161     albertel 1195:       $ENV{'form.editmode'}='Edit'; #force edit mode
1.151     albertel 1196:     }
1.50      albertel 1197:   } else {
1.147     albertel 1198:     unless ($ENV{'request.state'} eq 'published') {
                   1199:       if ($ENV{'form.attemptclean'}) {
                   1200: 	$filecontents=&htmlclean($filecontents,1);
1.107     www      1201:       }
1.147     albertel 1202:     }
1.161     albertel 1203:     if (!$ENV{'form.editmode'} || $ENV{'form.viewmode'}) {
1.172     albertel 1204:       $result = &Apache::lonxml::xmlparse($request,$target,$filecontents,
                   1205: 					  '',%mystyle);
1.147     albertel 1206:     }
1.78      www      1207:   }
                   1208: 
                   1209: #
                   1210: # Edit action? Insert editing commands
                   1211: #
                   1212:   unless ($ENV{'request.state'} eq 'published') {
1.161     albertel 1213:     if ($ENV{'form.editmode'} && (!($ENV{'form.viewmode'}))) {
1.177     www      1214: 	my $displayfile=$request->uri;
                   1215:         $displayfile=~s/^\/[^\/]*//;
                   1216:       $result='<html><body bgcolor="#FFFFFF"><h3>'.$displayfile.
                   1217:               '</h3></body></html>';
1.78      www      1218:       $result=&inserteditinfo($result,$filecontents);
1.147     albertel 1219:     }
1.66      www      1220:   }
1.147     albertel 1221: 
1.126     www      1222:   writeallows($request->uri);
1.50      albertel 1223: 
1.67      www      1224:   $request->print($result);
1.64      albertel 1225: 
1.45      www      1226:   return OK;
1.24      sakharuk 1227: }
1.147     albertel 1228: 
1.22      albertel 1229: sub debug {
                   1230:   if ($Apache::lonxml::debug eq 1) {
1.146     albertel 1231:     $|=1;
1.202     albertel 1232:     print('<font size="-2"<pre>DEBUG:'.&HTML::Entities::encode($_[0])."</pre></font>\n");
1.22      albertel 1233:   }
                   1234: }
1.49      albertel 1235: 
1.22      albertel 1236: sub error {
1.205     www      1237:   $errorcount++;
1.74      albertel 1238:   if (($Apache::lonxml::debug eq 1) || ($ENV{'request.state'} eq 'construct') ) {
1.166     matthew  1239:     # If printing in construction space, put the error inside <pre></pre>
1.167     albertel 1240:     print "<b>ERROR:</b>".join("\n",@_)."\n";
1.52      albertel 1241:   } else {
                   1242:     print "<b>An Error occured while processing this resource. The instructor has been notified.</b> <br />";
                   1243:     #notify author
1.146     albertel 1244:     &Apache::lonmsg::author_res_msg($ENV{'request.filename'},join('<br />',@_));
1.52      albertel 1245:     #notify course
                   1246:     if ( $ENV{'request.course.id'} ) {
1.209     www      1247:       my (undef,%users)=&Apache::lonfeedback::decide_receiver(undef,0,1,1,1);
1.143     www      1248:       my $declutter=&Apache::lonnet::declutter($ENV{'request.filename'});
1.209     www      1249:       foreach (keys %users) {
                   1250: 	my ($user,$domain) = split(/:/, $_);
1.143     www      1251: 	&Apache::lonmsg::user_normal_msg($user,$domain,
1.146     albertel 1252:         "Error [$declutter]",join('<br />',@_));
1.52      albertel 1253:       }
                   1254:     }
1.74      albertel 1255: 
1.52      albertel 1256:     #FIXME probably shouldn't have me get everything forever.
1.146     albertel 1257:     &Apache::lonmsg::user_normal_msg('albertel','msu',"Error in $ENV{'request.filename'}",join('<br />',@_));
1.74      albertel 1258:     #&Apache::lonmsg::user_normal_msg('albertel','103',"Error in $ENV{'request.filename'}",$_[0]);
1.52      albertel 1259:   }
1.22      albertel 1260: }
1.49      albertel 1261: 
1.22      albertel 1262: sub warning {
1.205     www      1263:   $warningcount++;
1.73      harris41 1264:   if ($ENV{'request.state'} eq 'construct') {
1.146     albertel 1265:     print "<b>W</b>ARNING<b>:</b>".join('<br />',@_)."<br />\n";
1.73      harris41 1266:   }
1.83      albertel 1267: }
                   1268: 
                   1269: sub get_param {
1.213     albertel 1270:     my ($param,$parstack,$safeeval,$context,$case_insensitive) = @_;
                   1271:     if ( ! $context ) { $context = -1; }
                   1272:     my $args ='';
                   1273:     if ( $#$parstack > (-2-$context) ) { $args=$$parstack[$context]; }
                   1274:     if ( ! $args ) { return undef; }
                   1275:     if ( $case_insensitive ) {
                   1276: 	if ($args =~ s/(my \$)(\Q$param\E)(=\")/$1.lc($2).$3/ei) {
                   1277: 	    return &Apache::run::run("{$args;".'return $'.$param.'}',
                   1278:                                      $safeeval); #'
                   1279: 	} else {
                   1280: 	    return undef;
                   1281: 	}
                   1282:     } else {
                   1283: 	if ( $args =~ /my \$\Q$param\E=\"/ ) {
                   1284: 	    return &Apache::run::run("{$args;".'return $'.$param.'}',
                   1285:                                      $safeeval); #'
                   1286: 	} else {
                   1287: 	    return undef;
                   1288: 	}
                   1289:     }
1.22      albertel 1290: }
                   1291: 
1.132     albertel 1292: sub get_param_var {
1.213     albertel 1293:   my ($param,$parstack,$safeeval,$context,$case_insensitive) = @_;
1.132     albertel 1294:   if ( ! $context ) { $context = -1; }
                   1295:   my $args ='';
                   1296:   if ( $#$parstack > (-2-$context) ) { $args=$$parstack[$context]; }
1.230     albertel 1297:   &Apache::lonxml::debug("Args are $args param is $param");
1.213     albertel 1298:   if ($case_insensitive) {
                   1299:       if (! ($args=~s/(my \$)(\Q$param\E)(=\")/$1.lc($2).$3/ei)) {
                   1300: 	  return undef;
                   1301:       }
                   1302:   } elsif ( $args !~ /my \$\Q$param\E=\"/ ) { return undef; }
1.132     albertel 1303:   my $value=&Apache::run::run("{$args;".'return $'.$param.'}',$safeeval); #'
1.230     albertel 1304:   &Apache::lonxml::debug("first run is $value");
                   1305:   if ($value =~ /^[\$\@\%]\w+$/) {
                   1306:       &Apache::lonxml::debug("doing second");
                   1307:       my @result=&Apache::run::run("return $value",$safeeval,1);
                   1308:       if (!defined($result[0])) {
                   1309: 	  return $value
                   1310:       } else {
                   1311: 	  if (wantarray) { return @result; } else { return $result[0]; }
                   1312:       }
1.132     albertel 1313:   } else {
                   1314:     return $value;
                   1315:   }
                   1316: }
                   1317: 
1.74      albertel 1318: sub register_insert {
1.75      albertel 1319:   my @data = split /\n/, &Apache::lonnet::getfile('/home/httpd/lonTabs/insertlist.tab');
1.74      albertel 1320:   my $i;
1.76      albertel 1321:   my $tagnum=0;
1.74      albertel 1322:   my @order;
                   1323:   for ($i=0;$i < $#data; $i++) {
                   1324:     my $line = $data[$i];
                   1325:     if ( $line =~ /^\#/ || $line =~ /^\s*\n/) { next; }
                   1326:     if ( $line =~ /TABLE/ ) { last; }
1.92      albertel 1327:     my ($tag,$descrip,$color,$function,$show) = split(/,/, $line);
1.135     albertel 1328:     if ($tag) {
                   1329:       $insertlist{"$tagnum.tag"} = $tag;
                   1330:       $insertlist{"$tagnum.description"} = $descrip;
                   1331:       $insertlist{"$tagnum.color"} = $color;
                   1332:       $insertlist{"$tagnum.function"} = $function;
                   1333:       if (!defined($show)) { $show='yes'; }
                   1334:       $insertlist{"$tagnum.show"}= $show;
                   1335:       $insertlist{"$tag.num"}=$tagnum;
                   1336:       $tagnum++;
                   1337:     }
1.74      albertel 1338:   }
1.76      albertel 1339:   $i++; #skipping TABLE line
                   1340:   $tagnum = 0;
1.74      albertel 1341:   for (;$i < $#data;$i++) {
                   1342:     my $line = $data[$i];
1.76      albertel 1343:     my ($mnemonic,@which) = split(/ +/,$line);
                   1344:     my $tag = $insertlist{"$tagnum.tag"};
1.144     matthew  1345:     for (my $j=0;$j <=$#which;$j++) {
1.74      albertel 1346:       if ( $which[$j] eq 'Y' ) {
1.76      albertel 1347: 	if ($insertlist{"$j.show"} ne 'no') {
                   1348: 	  push(@{ $insertlist{"$tag.which"} },$j);
                   1349: 	}
1.74      albertel 1350:       }
                   1351:     }
1.76      albertel 1352:     $tagnum++;
1.74      albertel 1353:   }
                   1354: }
1.98      albertel 1355: 
                   1356: sub description {
                   1357:   my ($token)=@_;
1.138     albertel 1358:   my $tagnum;
                   1359:   my $tag=$token->[1];
                   1360:   foreach my $namespace (reverse @Apache::lonxml::namespace) {
                   1361:     my $testtag=$namespace.'::'.$tag;
                   1362:     $tagnum=$insertlist{"$testtag.num"};
                   1363:     if (defined($tagnum)) { last; }
                   1364:   }
                   1365:   if (!defined ($tagnum)) { $tagnum=$Apache::lonxml::insertlist{"$tag.num"}; }
                   1366:   return $insertlist{$tagnum.'.description'};
1.98      albertel 1367: }
1.123     albertel 1368: 
                   1369: # ----------------------------------------------------------------- whichuser
                   1370: # returns a list of $symb, $courseid, $domain, $name that is correct for
                   1371: # calls to lonnet functions for this setup.
                   1372: # - looks for form.grade_ parameters
                   1373: sub whichuser {
1.134     albertel 1374:   my ($symb,$courseid,$domain,$name);
1.123     albertel 1375:   if (defined($ENV{'form.grade_symb'})) {
                   1376:     my $tmp_courseid=$ENV{'form.grade_courseid'};
                   1377:     my $allowed=&Apache::lonnet::allowed('mgr',$tmp_courseid);
                   1378:     if ($allowed) {
                   1379:       $symb=$ENV{'form.grade_symb'};
                   1380:       $courseid=$ENV{'form.grade_courseid'};
                   1381:       $domain=$ENV{'form.grade_domain'};
                   1382:       $name=$ENV{'form.grade_username'};
                   1383:     }
1.134     albertel 1384:   } else {
                   1385:     $symb=&Apache::lonnet::symbread();
                   1386:     $courseid=$ENV{'request.course.id'};
                   1387:     $domain=$ENV{'user.domain'};
                   1388:     $name=$ENV{'user.name'};
1.123     albertel 1389:   }
                   1390:   return ($symb,$courseid,$domain,$name);
                   1391: }
                   1392: 
1.1       sakharuk 1393: 1;
                   1394: __END__
1.68      www      1395: 
                   1396: 

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