Annotation of loncom/xml/lonxml.pm, revision 1.415.2.1

1.2       sakharuk    1: # The LearningOnline Network with CAPA
1.3       sakharuk    2: # XML Parser Module 
1.2       sakharuk    3: #
1.415.2.1! albertel    4: # $Id: lonxml.pm,v 1.415 2006/07/11 09:44:04 foxr 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: #
1.316     albertel   39: 
1.2       sakharuk   40: 
1.4       albertel   41: package Apache::lonxml; 
1.33      www        42: use vars 
1.410     albertel   43: qw(@pwd @outputstack $redirection $import @extlinks $metamode $evaluate %insertlist @namespace $errorcount $warningcount);
1.1       sakharuk   44: use strict;
1.167     albertel   45: use HTML::LCParser();
1.161     albertel   46: use HTML::TreeBuilder();
                     47: use HTML::Entities();
                     48: use Safe();
                     49: use Safe::Hole();
                     50: use Math::Cephes();
                     51: use Math::Random();
                     52: use Opcode();
1.271     www        53: use POSIX qw(strftime);
1.339     albertel   54: use Time::HiRes qw( gettimeofday tv_interval );
1.393     albertel   55: use Symbol();
1.266     bowersj2   56: 
1.72      albertel   57: sub register {
1.141     albertel   58:   my ($space,@taglist) = @_;
                     59:   foreach my $temptag (@taglist) {
                     60:     push(@{ $Apache::lonxml::alltags{$temptag} },$space);
1.72      albertel   61:   }
                     62: }
                     63: 
1.141     albertel   64: sub deregister {
                     65:   my ($space,@taglist) = @_;
                     66:   foreach my $temptag (@taglist) {
                     67:     my $tempspace = $Apache::lonxml::alltags{$temptag}[-1];
                     68:     if ($tempspace eq $space) {
                     69:       pop(@{ $Apache::lonxml::alltags{$temptag} });
                     70:     }
                     71:   }
1.142     albertel   72:   #&printalltags();
1.141     albertel   73: }
                     74: 
1.46      www        75: use Apache::Constants qw(:common);
1.161     albertel   76: use Apache::lontexconvert();
                     77: use Apache::style();
                     78: use Apache::run();
                     79: use Apache::londefdef();
                     80: use Apache::scripttag();
1.285     www        81: use Apache::languagetags();
1.161     albertel   82: use Apache::edit();
1.266     bowersj2   83: use Apache::inputtags();
                     84: use Apache::outputtags();
1.372     albertel   85: use Apache::lonnet;
1.161     albertel   86: use Apache::File();
                     87: use Apache::loncommon();
1.198     www        88: use Apache::lonfeedback();
1.200     www        89: use Apache::lonmsg();
1.217     matthew    90: use Apache::loncacc();
1.280     www        91: use Apache::lonlocal;
1.79      www        92: 
1.72      albertel   93: #==================================================   Main subroutine: xmlparse  
                     94: #debugging control, to turn on debugging modify the correct handler
                     95: $Apache::lonxml::debug=0;
1.206     albertel   96: 
                     97: # keeps count of the number of warnings and errors generated in a parse
                     98: $warningcount=0;
                     99: $errorcount=0;
1.72      albertel  100: 
                    101: #path to the directory containing the file currently being processed
                    102: @pwd=();
                    103: 
                    104: #these two are used for capturing a subset of the output for later processing,
                    105: #don't touch them directly use &startredirection and &endredirection
                    106: @outputstack = ();
                    107: $redirection = 0;
                    108: 
                    109: #controls wheter the <import> tag actually does
                    110: $import = 1;
                    111: @extlinks=();
                    112: 
                    113: # meta mode is a bit weird only some output is to be turned off
                    114: #<output> tag turns metamode off (defined in londefdef.pm)
                    115: $metamode = 0;
                    116: 
                    117: # turns on and of run::evaluate actually derefencing var refs
                    118: $evaluate = 1;
1.7       albertel  119: 
1.74      albertel  120: # data structure for eidt mode, determines what tags can go into what other tags
                    121: %insertlist=();
1.68      www       122: 
1.99      albertel  123: # stores the list of active tag namespaces
1.76      albertel  124: @namespace=();
                    125: 
1.172     albertel  126: # a pointer the the Apache request object
                    127: $Apache::lonxml::request='';
                    128: 
1.216     sakharuk  129: # a problem number counter, and check on ether it is used
1.237     sakharuk  130: $Apache::lonxml::counter=1;
1.204     albertel  131: $Apache::lonxml::counter_changed=0;
                    132: 
1.212     albertel  133: #internal check on whether to look at style defs
                    134: $Apache::lonxml::usestyle=1;
1.260     albertel  135: 
                    136: #locations used to store the parameter string for style substitutions
                    137: $Apache::lonxml::style_values='';
                    138: $Apache::lonxml::style_end_values='';
1.212     albertel  139: 
1.281     albertel  140: #array of ssi calls that need to occur after we are done parsing
                    141: @Apache::lonxml::ssi_info=();
                    142: 
1.282     albertel  143: #should we do the postag variable interpolation
                    144: $Apache::lonxml::post_evaluate=1;
                    145: 
1.295     albertel  146: #a header message to emit in the case of any generated warning or errors
                    147: $Apache::lonxml::warnings_error_header='';
                    148: 
1.396     foxr      149: #  Control whether or not LaTeX symbols should be substituted for their
                    150: #  \ style equivalents...this may be turned off e.g. in an verbatim
                    151: #  environment.
                    152: 
                    153: $Apache::lonxml::substitute_LaTeX_symbols = 1; # Starts out on.
                    154: 
                    155: sub enable_LaTeX_substitutions {
                    156:     $Apache::lonxml::substitute_LaTeX_symbols = 1;
                    157: }
                    158: sub disable_LaTeX_substitutions {
                    159:     $Apache::lonxml::substitute_LaTeX_symbols = 0;
                    160: }
                    161: 
1.68      www       162: sub xmlend {
1.335     sakharuk  163:     my ($target,$parser)=@_;
1.278     www       164:     my $mode='xml';
                    165:     my $status='OPEN';
1.368     albertel  166:     if ($Apache::lonhomework::parsing_a_problem ||
                    167: 	$Apache::lonhomework::parsing_a_task ) {
1.278     www       168: 	$mode='problem';
                    169: 	$status=$Apache::inputtags::status[-1]; 
                    170:     }
1.362     matthew   171:     my $discussion;
1.379     albertel  172:     &Apache::loncommon::get_unprocessed_cgi($ENV{'QUERY_STRING'},
                    173: 					   ['LONCAPA_INTERNAL_no_discussion']);
1.372     albertel  174:     if (! exists($env{'form.LONCAPA_INTERNAL_no_discussion'}) ||
                    175:         $env{'form.LONCAPA_INTERNAL_no_discussion'} ne 'true') {
1.362     matthew   176:         $discussion=&Apache::lonfeedback::list_discussion($mode,$status);
                    177:     }
1.334     sakharuk  178:     if ($target eq 'tex') {
1.335     sakharuk  179: 	$discussion.='<tex>\keephidden{ENDOFPROBLEM}\vskip 0.5mm\noindent\makebox[\textwidth/$number_of_columns][b]{\hrulefill}\end{document}</tex>';
1.334     sakharuk  180: 	&Apache::lonxml::newparser($parser,\$discussion,'');
                    181: 	return '';
                    182:     }
1.405     albertel  183: 
1.407     albertel  184:     return $discussion;
1.119     www       185: }
                    186: 
                    187: sub tokeninputfield {
1.120     www       188:     my $defhost=$Apache::lonnet::perlvar{'lonHostID'};
                    189:     $defhost=~tr/a-z/A-Z/;
1.119     www       190:     return (<<ENDINPUTFIELD)
1.226     albertel  191: <script type="text/javascript">
1.120     www       192:     function updatetoken() {
                    193: 	var comp=new Array;
                    194:         var barcode=unescape(document.tokeninput.barcode.value);
                    195:         comp=barcode.split('*');
                    196:         if (typeof(comp[0])!="undefined") {
                    197: 	    document.tokeninput.codeone.value=comp[0];
                    198: 	}
                    199:         if (typeof(comp[1])!="undefined") {
                    200: 	    document.tokeninput.codetwo.value=comp[1];
                    201: 	}
                    202:         if (typeof(comp[2])!="undefined") {
                    203:             comp[2]=comp[2].toUpperCase();
                    204: 	    document.tokeninput.codethree.value=comp[2];
                    205: 	}
                    206:         document.tokeninput.barcode.value='';
                    207:     }  
                    208: </script>
                    209: <form method="post" name="tokeninput">
1.119     www       210: <table border="2" bgcolor="#FFFFBB">
                    211: <tr><th>DocID Checkin</th></tr>
                    212: <tr><td>
                    213: <table>
                    214: <tr>
                    215: <td>Scan in Barcode</td>
1.120     www       216: <td><input type="text" size="22" name="barcode" 
                    217: onChange="updatetoken()"/></td>
1.119     www       218: </tr>
                    219: <tr><td><i>or</i> Type in DocID</td>
                    220: <td>
                    221: <input type="text" size="5" name="codeone" />
1.120     www       222: <b><font size="+2">*</font></b>
1.119     www       223: <input type="text" size="5" name="codetwo" />
1.120     www       224: <b><font size="+2">*</font></b>
                    225: <input type="text" size="10" name="codethree" value="$defhost" 
                    226: onChange="this.value=this.value.toUpperCase()" />
1.119     www       227: </td></tr>
                    228: </table>
                    229: </td></tr>
                    230: <tr><td><input type="submit" value="Check in DocID" /></td></tr>
                    231: </table>
                    232: </form>
                    233: ENDINPUTFIELD
1.112     www       234: }
                    235: 
1.116     www       236: sub maketoken {
1.118     www       237:     my ($symb,$tuname,$tudom,$tcrsid)=@_;
1.112     www       238:     unless ($symb) {
                    239: 	$symb=&Apache::lonnet::symbread();
                    240:     }
                    241:     unless ($tuname) {
1.372     albertel  242: 	$tuname=$env{'user.name'};
                    243:         $tudom=$env{'user.domain'};
                    244:         $tcrsid=$env{'request.course.id'};
1.112     www       245:     }
1.116     www       246: 
1.118     www       247:     return &Apache::lonnet::checkout($symb,$tuname,$tudom,$tcrsid);
                    248: }
                    249: 
                    250: sub printtokenheader {
1.133     albertel  251:     my ($target,$token,$tsymb,$tcrsid,$tudom,$tuname)=@_;
1.116     www       252:     unless ($token) { return ''; }
1.118     www       253: 
1.133     albertel  254:     my ($symb,$courseid,$domain,$name) = &Apache::lonxml::whichuser();
                    255:     unless ($tsymb) {
                    256: 	$tsymb=$symb;
1.118     www       257:     }
                    258:     unless ($tuname) {
1.133     albertel  259: 	$tuname=$name;
                    260:         $tudom=$domain;
                    261:         $tcrsid=$courseid;
1.118     www       262:     }
1.114     www       263: 
1.390     albertel  264:     my $plainname=&Apache::loncommon::plainname($tuname,$tudom);
1.114     www       265: 
1.112     www       266:     if ($target eq 'web') {
1.145     www       267:         my %idhash=&Apache::lonnet::idrget($tudom,($tuname));
1.115     www       268: 	return 
1.221     albertel  269:  '<img align="right" src="/cgi-bin/barcode.png?encode='.$token.'" />'.
1.284     www       270:                &mt('Checked out for').' '.$plainname.
                    271:                '<br />'.&mt('User').': '.$tuname.' at '.$tudom.
                    272: 	       '<br />'.&mt('ID').': '.$idhash{$tuname}.
                    273: 	       '<br />'.&mt('CourseID').': '.$tcrsid.
1.372     albertel  274: 	       '<br />'.&mt('Course').': '.$env{'course.'.$tcrsid.'.description'}.
1.284     www       275:                '<br />'.&mt('DocID').': '.$token.
                    276:                '<br />'.&mt('Time').': '.&Apache::lonlocal::locallocaltime().'<hr />';
1.112     www       277:     } else {
1.121     albertel  278:         return $token;
1.112     www       279:     }
1.68      www       280: }
                    281: 
1.48      albertel  282: sub printalltags {
                    283:   my $temp;
                    284:   foreach $temp (sort keys %Apache::lonxml::alltags) {
1.141     albertel  285:     &Apache::lonxml::debug("$temp -- ".
                    286: 		  join(',',@{ $Apache::lonxml::alltags{$temp} }));
1.48      albertel  287:   }
                    288: }
1.31      sakharuk  289: 
1.3       sakharuk  290: sub xmlparse {
1.172     albertel  291:  my ($request,$target,$content_file_string,$safeinit,%style_for_target) = @_;
1.96      albertel  292: 
1.172     albertel  293:  &setup_globals($request,$target);
1.232     albertel  294:  &Apache::inputtags::initialize_inputtags();
1.370     albertel  295:  &Apache::bridgetask::initialize_bridgetask();
1.232     albertel  296:  &Apache::outputtags::initialize_outputtags();
                    297:  &Apache::edit::initialize_edit();
1.287     albertel  298:  &Apache::londefdef::initialize_londefdef();
1.244     albertel  299: 
1.178     www       300: #
                    301: # do we have a course style file?
                    302: #
                    303: 
1.372     albertel  304:  if ($env{'request.course.id'} && $env{'request.state'} ne 'construct') {
1.178     www       305:      my $bodytext=
1.372     albertel  306: 	 $env{'course.'.$env{'request.course.id'}.'.default_xml_style'};
1.178     www       307:      if ($bodytext) {
1.337     albertel  308: 	 foreach my $file (split(',',$bodytext)) {
                    309: 	     my $location=&Apache::lonnet::filelocation('',$file);
                    310: 	     my $styletext=&Apache::lonnet::getfile($location);
                    311: 	     if ($styletext ne '-1') {
                    312: 		 %style_for_target = (%style_for_target,
                    313: 				      &Apache::style::styleparser($target,$styletext));
                    314: 	     }
                    315: 	 }
                    316:      }
1.372     albertel  317:  } elsif ($env{'construct.style'} && ($env{'request.state'} eq 'construct')) {
                    318:      my $location=&Apache::lonnet::filelocation('',$env{'construct.style'});
1.291     sakharuk  319:      my $styletext=&Apache::lonnet::getfile($location);
                    320:        if ($styletext ne '-1') {
                    321:           %style_for_target = (%style_for_target,
                    322:                           &Apache::style::styleparser($target,$styletext));
                    323:       }
1.178     www       324:  }
1.255     sakharuk  325: #&printalltags();
1.16      albertel  326:  my @pars = ();
1.372     albertel  327:  my $pwd=$env{'request.filename'};
1.23      albertel  328:  $pwd =~ s:/[^/]*$::;
                    329:  &newparser(\@pars,\$content_file_string,$pwd);
1.24      sakharuk  330: 
1.3       sakharuk  331:  my $safeeval = new Safe;
1.40      albertel  332:  my $safehole = new Safe::Hole;
1.82      ng        333:  &init_safespace($target,$safeeval,$safehole,$safeinit);
1.3       sakharuk  334: #-------------------- Redefinition of the target in the case of compound target
                    335: 
                    336:  ($target, my @tenta) = split('&&',$target);
                    337: 
1.150     albertel  338:  my @stack = ();
1.3       sakharuk  339:  my @parstack = ();
1.358     albertel  340:  &initdepth();
                    341:  &init_alarm();
1.101     albertel  342:  my $finaloutput = &inner_xmlparse($target,\@stack,\@parstack,\@pars,
1.394     albertel  343: 				   $safeeval,\%style_for_target,1);
1.255     sakharuk  344: 
1.372     albertel  345:  if ($env{'request.uri'}) {
                    346:     &writeallows($env{'request.uri'});
1.125     www       347:  }
1.281     albertel  348:  &do_registered_ssi();
1.204     albertel  349:  if ($Apache::lonxml::counter_changed) { &store_counter() }
1.393     albertel  350: 
                    351:  &clean_safespace($safeeval);
                    352: 
1.372     albertel  353:  if ($env{'form.return_only_error_and_warning_counts'}) {
1.361     www       354:      return "$errorcount:$warningcount";
                    355:  }
1.3       sakharuk  356:  return $finaloutput;
1.106     www       357: }
                    358: 
1.191     albertel  359: sub latex_special_symbols {
1.272     albertel  360:     my ($string,$where)=@_;
1.396     foxr      361:     #
                    362:     #  If e.g. in verbatim mode, then don't substitute.
                    363:     #  but return original string.
                    364:     #
                    365:     if (!($Apache::lonxml::substitute_LaTeX_symbols)) {
                    366: 	return $string;
                    367:     }
1.235     sakharuk  368:     if ($where eq 'header') {
1.414     foxr      369: 	$string =~ s/\\/\$\\backslash\$/g; # \  -> $\backslash$ per LaTex line by line pg  10.
1.311     albertel  370: 	$string =~ s/(\$|%|\{|\})/\\$1/g;
                    371: 	$string=&Apache::lonprintout::character_chart($string);
                    372: 	# any & or # leftover should be safe to just escape
                    373:         $string=~s/([^\\])\&/$1\\\&/g;
                    374:         $string=~s/([^\\])\#/$1\\\#/g;
1.415     foxr      375: 	$string =~ s/_/\\_/g;              # _ -> \_
                    376: 	$string =~ s/\^/\\\^{}/g;          # ^ -> \^{} 
1.229     sakharuk  377:     } else {
1.312     albertel  378: 	$string=~s/\\/\\ensuremath{\\backslash}/g;
1.367     albertel  379: 	$string=~s/\\\%|\%/\\\%/g;
                    380: 	$string=~s/\\{|{/\\{/g;
                    381: 	$string=~s/\\}|}/\\}/g;
1.378     albertel  382: 	$string=~s/\\ensuremath\\{\\backslash\\}/\\ensuremath{\\backslash}/g;
1.367     albertel  383: 	$string=~s/\\\$|\$/\\\$/g;
                    384: 	$string=~s/\\\_|\_/\\\_/g;
1.313     albertel  385:         $string=~s/([^\\]|^)(\~|\^)/$1\\$2\\strut /g;
1.310     sakharuk  386: 	$string=~s/(>|<)/\\ensuremath\{$1\}/g; #more or less
1.311     albertel  387: 	$string=&Apache::lonprintout::character_chart($string);
                    388: 	# any & or # leftover should be safe to just escape
1.367     albertel  389: 	$string=~s/\\\&|\&/\\\&/g;
                    390: 	$string=~s/\\\#|\#/\\\#/g;
1.332     sakharuk  391:         $string=~s/\|/\$\\mid\$/g;
1.310     sakharuk  392: #single { or } How to escape?
1.229     sakharuk  393:     }
1.272     albertel  394:     return $string;
1.188     sakharuk  395: }
                    396: 
1.101     albertel  397: sub inner_xmlparse {
1.394     albertel  398:   my ($target,$stack,$parstack,$pars,$safeeval,$style_for_target,$start)=@_;
1.101     albertel  399:   my $finaloutput = '';
                    400:   my $result;
                    401:   my $token;
1.258     albertel  402:   my $dontpop=0;
1.389     albertel  403:   my $startredirection = $Apache::lonxml::redirection;
1.101     albertel  404:   while ( $#$pars > -1 ) {
                    405:     while ($token = $$pars['-1']->get_token) {
1.261     albertel  406:       if (($token->[0] eq 'T') || ($token->[0] eq 'C') ) {
1.101     albertel  407: 	if ($metamode<1) {
1.190     albertel  408: 	    my $text=$token->[1];
1.193     albertel  409: 	    if ($token->[0] eq 'C' && $target eq 'tex') {
1.239     sakharuk  410: 		$text = '';
                    411: #		$text = '%'.$text."\n";
1.182     sakharuk  412: 	    }
1.190     albertel  413: 	    $result.=$text;
1.101     albertel  414: 	}
1.261     albertel  415:       } elsif (($token->[0] eq 'D')) {
                    416: 	if ($metamode<1 && $target eq 'web') {
                    417: 	    my $text=$token->[1];
                    418: 	    $result.=$text;
                    419: 	}
1.101     albertel  420:       } elsif ($token->[0] eq 'PI') {
1.261     albertel  421: 	if ($metamode<1 && $target eq 'web') {
1.101     albertel  422: 	  $result=$token->[2];
                    423: 	}
                    424:       } elsif ($token->[0] eq 'S') {
1.140     albertel  425: 	# add tag to stack
1.101     albertel  426: 	push (@$stack,$token->[1]);
                    427: 	# add parameters list to another stack
                    428: 	push (@$parstack,&parstring($token));
1.140     albertel  429: 	&increasedepth($token);
1.212     albertel  430: 	if ($Apache::lonxml::usestyle &&
                    431: 	    exists($$style_for_target{$token->[1]})) {
                    432: 	    $Apache::lonxml::usestyle=0;
                    433: 	    my $string=$$style_for_target{$token->[1]}.
                    434: 	      '<LONCAPA_INTERNAL_TURN_STYLE_ON />';
                    435: 	    &Apache::lonxml::newparser($pars,\$string);
1.257     albertel  436: 	    $Apache::lonxml::style_values=$$parstack[-1];
1.259     albertel  437: 	    $Apache::lonxml::style_end_values=$$parstack[-1];
1.101     albertel  438: 	} else {
                    439: 	  $result = &callsub("start_$token->[1]", $target, $token, $stack,
                    440: 			     $parstack, $pars, $safeeval, $style_for_target);
1.140     albertel  441: 	}
1.101     albertel  442:       } elsif ($token->[0] eq 'E') {
1.212     albertel  443: 	if ($Apache::lonxml::usestyle &&
                    444: 	    exists($$style_for_target{'/'."$token->[1]"})) {
                    445: 	    $Apache::lonxml::usestyle=0;
                    446: 	    my $string=$$style_for_target{'/'.$token->[1]}.
1.258     albertel  447: 	      '<LONCAPA_INTERNAL_TURN_STYLE_ON end="'.$token->[1].'" />';
1.212     albertel  448: 	    &Apache::lonxml::newparser($pars,\$string);
1.259     albertel  449: 	    $Apache::lonxml::style_values=$Apache::lonxml::style_end_values;
                    450: 	    $Apache::lonxml::style_end_values='';
1.258     albertel  451: 	    $dontpop=1;
1.101     albertel  452: 	} else {
1.258     albertel  453: 	    #clear out any tags that didn't end
                    454: 	    while ($token->[1] ne $$stack['-1'] && ($#$stack > -1)) {
                    455: 		my $lasttag=$$stack[-1];
1.317     albertel  456: 		if ($token->[1] =~ /^\Q$lasttag\E$/i) {
1.258     albertel  457: 		    &Apache::lonxml::warning('Using tag &lt;/'.$token->[1].'&gt; on line '.$token->[3].' as end tag to &lt;'.$$stack[-1].'&gt;');
                    458: 		    last;
                    459: 		} else {
                    460: 		    &Apache::lonxml::warning('Found tag &lt;/'.$token->[1].'&gt; on line '.$token->[3].' when looking for &lt;/'.$$stack[-1].'&gt; in file');
                    461: 		    &end_tag($stack,$parstack,$token);
                    462: 		}
                    463: 	    }
                    464: 	    $result = &callsub("end_$token->[1]", $target, $token, $stack,
                    465: 			       $parstack, $pars,$safeeval, $style_for_target);
1.101     albertel  466: 	}
                    467:       } else {
                    468: 	&Apache::lonxml::error("Unknown token event :$token->[0]:$token->[1]:");
                    469:       }
                    470:       #evaluate variable refs in result
1.282     albertel  471:       if ($Apache::lonxml::post_evaluate &&$result ne "") {
1.257     albertel  472: 	  my $extras;
                    473: 	  if (!$Apache::lonxml::usestyle) {
                    474: 	      $extras=$Apache::lonxml::style_values;
                    475: 	  }
1.101     albertel  476: 	if ( $#$parstack > -1 ) {
1.257     albertel  477: 	  $result=&Apache::run::evaluate($result,$safeeval,$extras.$$parstack[-1]);
1.101     albertel  478: 	} else {
1.257     albertel  479: 	  $result= &Apache::run::evaluate($result,$safeeval,$extras);
1.101     albertel  480: 	}
1.163     albertel  481:       }
1.282     albertel  482:       $Apache::lonxml::post_evaluate=1;
                    483: 
1.190     albertel  484:       if (($token->[0] eq 'T') || ($token->[0] eq 'C') || ($token->[0] eq 'D') ) {
1.249     albertel  485: 	  #Style file definitions should be correct
1.250     albertel  486: 	  if ($target eq 'tex' && ($Apache::lonxml::usestyle)) {
1.311     albertel  487: 	      $result=&latex_special_symbols($result);
1.249     albertel  488: 	  }
1.190     albertel  489:       }
                    490: 
1.169     albertel  491:       if ($Apache::lonxml::redirection) {
                    492: 	$Apache::lonxml::outputstack['-1'] .= $result;
                    493:       } else {
                    494: 	$finaloutput.=$result;
                    495:       }
                    496:       $result = '';
                    497: 
1.258     albertel  498:       if ($token->[0] eq 'E' && !$dontpop) {
1.101     albertel  499: 	&end_tag($stack,$parstack,$token);
                    500:       }
1.258     albertel  501:       $dontpop=0;
1.224     albertel  502:     }	
1.212     albertel  503:     if ($#$pars > -1) {
                    504: 	pop @$pars;
                    505: 	pop @Apache::lonxml::pwd;
                    506:     }
1.101     albertel  507:   }
                    508: 
                    509:   # if ($target eq 'meta') {
                    510:   #   $finaloutput.=&endredirection;
                    511:   # }
                    512: 
1.394     albertel  513:   if ( $start && $target eq 'grade') { &endredirection(); }
1.389     albertel  514:   if ( $Apache::lonxml::redirection > $startredirection) {
                    515:       while ($Apache::lonxml::redirection > $startredirection) {
                    516: 	  $finaloutput .= &endredirection();
1.387     albertel  517:       }
                    518:   }
1.101     albertel  519:   if (($ENV{'QUERY_STRING'}) && ($target eq 'web')) {
                    520:     $finaloutput=&afterburn($finaloutput);
1.216     sakharuk  521:   }	    
1.101     albertel  522:   return $finaloutput;
                    523: }
1.67      www       524: 
1.318     matthew   525: ## 
                    526: ## Looks to see if there is a subroutine defined for this tag.  If so, call it,
                    527: ## otherwise do not call it as we do not know what it is.
                    528: ##
1.7       albertel  529: sub callsub {
1.84      albertel  530:   my ($sub,$target,$token,$tagstack,$parstack,$parser,$safeeval,$style)=@_;
1.7       albertel  531:   my $currentstring='';
1.72      albertel  532:   my $nodefault;
1.7       albertel  533:   {
1.59      albertel  534:     my $sub1;
1.7       albertel  535:     no strict 'refs';
1.68      www       536:     my $tag=$token->[1];
1.236     www       537: # get utterly rid of extended html tags
                    538:     if ($tag=~/^x\-/i) { return ''; }
1.141     albertel  539:     my $space=$Apache::lonxml::alltags{$tag}[-1];
1.68      www       540:     if (!$space) {
1.141     albertel  541:      	$tag=~tr/A-Z/a-z/;
1.68      www       542: 	$sub=~tr/A-Z/a-z/;
1.141     albertel  543: 	$space=$Apache::lonxml::alltags{$tag}[-1]
1.68      www       544:     }
1.97      albertel  545: 
                    546:     my $deleted=0;
                    547:     $Apache::lonxml::curdepth=join('_',@Apache::lonxml::depthcounter);
                    548:     if (($token->[0] eq 'S') && ($target eq 'modified')) {
                    549:       $deleted=&Apache::edit::handle_delete($space,$target,$token,$tagstack,
                    550: 					     $parstack,$parser,$safeeval,
                    551: 					     $style);
                    552:     }
                    553:     if (!$deleted) {
                    554:       if ($space) {
1.220     albertel  555: 	#&Apache::lonxml::debug("Calling sub $sub in $space $metamode");
1.97      albertel  556: 	$sub1="$space\:\:$sub";
                    557: 	($currentstring,$nodefault) = &$sub1($target,$token,$tagstack,
                    558: 					     $parstack,$parser,$safeeval,
                    559: 					     $style);
                    560:       } else {
1.318     matthew   561:           if ($target eq 'tex') {
                    562:               # throw away tag name
                    563:               return '';
                    564:           }
1.220     albertel  565: 	#&Apache::lonxml::debug("NOT Calling sub $sub in $space $metamode");
1.97      albertel  566: 	if ($metamode <1) {
                    567: 	  if (defined($token->[4]) && ($metamode < 1)) {
                    568: 	    $currentstring = $token->[4];
                    569: 	  } else {
                    570: 	    $currentstring = $token->[2];
                    571: 	  }
1.62      sakharuk  572: 	}
1.7       albertel  573:       }
1.97      albertel  574:       #    &Apache::lonxml::debug("nodefalt:$nodefault:");
                    575:       if ($currentstring eq '' && $nodefault eq '') {
                    576: 	if ($target eq 'edit') {
1.220     albertel  577: 	  #&Apache::lonxml::debug("doing default edit for $token->[1]");
1.97      albertel  578: 	  if ($token->[0] eq 'S') {
                    579: 	    $currentstring = &Apache::edit::tag_start($target,$token);
                    580: 	  } elsif ($token->[0] eq 'E') {
                    581: 	    $currentstring = &Apache::edit::tag_end($target,$token);
                    582: 	  }
                    583: 	} elsif ($target eq 'modified') {
                    584: 	  if ($token->[0] eq 'S') {
                    585: 	    $currentstring = $token->[4];
                    586: 	    $currentstring.=&Apache::edit::handle_insert();
1.210     www       587: 	  } elsif ($token->[0] eq 'E') {
                    588: 	    $currentstring = $token->[2];
                    589:             $currentstring.=&Apache::edit::handle_insertafter($token->[1]);
1.97      albertel  590: 	  } else {
                    591: 	    $currentstring = $token->[2];
                    592: 	  }
1.72      albertel  593: 	}
                    594:       }
1.7       albertel  595:     }
                    596:     use strict 'refs';
                    597:   }
                    598:   return $currentstring;
1.82      ng        599: }
                    600: 
1.96      albertel  601: sub setup_globals {
1.172     albertel  602:   my ($request,$target)=@_;
                    603:   $Apache::lonxml::request=$request;
1.205     www       604:   $errorcount=0;
                    605:   $warningcount=0;
1.207     albertel  606:   $Apache::lonxml::default_homework_loaded=0;
1.212     albertel  607:   $Apache::lonxml::usestyle=1;
1.204     albertel  608:   &init_counter();
1.101     albertel  609:   @Apache::lonxml::pwd=();
1.124     albertel  610:   @Apache::lonxml::extlinks=();
1.281     albertel  611:   @Apache::lonxml::ssi_info=();
1.282     albertel  612:   $Apache::lonxml::post_evaluate=1;
1.295     albertel  613:   $Apache::lonxml::warnings_error_header='';
1.397     albertel  614:   $Apache::lonxml::substitute_LaTeX_symbols = 1;
1.96      albertel  615:   if ($target eq 'meta') {
                    616:     $Apache::lonxml::redirection = 0;
                    617:     $Apache::lonxml::metamode = 1;
                    618:     $Apache::lonxml::evaluate = 1;
                    619:     $Apache::lonxml::import = 0;
1.129     albertel  620:   } elsif ($target eq 'answer') {
                    621:     $Apache::lonxml::redirection = 0;
                    622:     $Apache::lonxml::metamode = 1;
                    623:     $Apache::lonxml::evaluate = 1;
                    624:     $Apache::lonxml::import = 1;
1.96      albertel  625:   } elsif ($target eq 'grade') {
1.387     albertel  626:     &startredirection(); #ended in inner_xmlparse on exit
1.96      albertel  627:     $Apache::lonxml::metamode = 0;
                    628:     $Apache::lonxml::evaluate = 1;
                    629:     $Apache::lonxml::import = 1;
                    630:   } elsif ($target eq 'modified') {
                    631:     $Apache::lonxml::redirection = 0;
                    632:     $Apache::lonxml::metamode = 0;
                    633:     $Apache::lonxml::evaluate = 0;
                    634:     $Apache::lonxml::import = 0;
                    635:   } elsif ($target eq 'edit') {
                    636:     $Apache::lonxml::redirection = 0;
                    637:     $Apache::lonxml::metamode = 0;
                    638:     $Apache::lonxml::evaluate = 0;
                    639:     $Apache::lonxml::import = 0;
1.163     albertel  640:   } elsif ($target eq 'analyze') {
                    641:     $Apache::lonxml::redirection = 0;
                    642:     $Apache::lonxml::metamode = 0;
                    643:     $Apache::lonxml::evaluate = 1;
                    644:     $Apache::lonxml::import = 1;
1.96      albertel  645:   } else {
                    646:     $Apache::lonxml::redirection = 0;
                    647:     $Apache::lonxml::metamode = 0;
                    648:     $Apache::lonxml::evaluate = 1;
                    649:     $Apache::lonxml::import = 1;
                    650:   }
                    651: }
                    652: 
1.82      ng        653: sub init_safespace {
                    654:   my ($target,$safeeval,$safehole,$safeinit) = @_;
1.393     albertel  655:   $safeeval->deny_only(':dangerous');
                    656:   $safeeval->reval('use Math::Complex;');
1.383     albertel  657:   $safeeval->permit_only(":default");
1.82      ng        658:   $safeeval->permit("entereval");
                    659:   $safeeval->permit(":base_math");
                    660:   $safeeval->permit("sort");
1.286     albertel  661:   $safeeval->permit("time");
1.371     albertel  662:   $safeeval->deny("rand");
                    663:   $safeeval->deny("srand");
1.82      ng        664:   $safeeval->deny(":base_io");
1.102     albertel  665:   $safehole->wrap(\&Apache::scripttag::xmlparse,$safeeval,'&xmlparse');
1.251     albertel  666:   $safehole->wrap(\&Apache::outputtags::multipart,$safeeval,'&multipart');
1.82      ng        667:   $safehole->wrap(\&Apache::lonnet::EXT,$safeeval,'&EXT');
1.324     albertel  668:   $safehole->wrap(\&Apache::chemresponse::chem_standard_order,$safeeval,
                    669: 		  '&chem_standard_order');
1.369     albertel  670:   $safehole->wrap(\&Apache::response::check_status,$safeeval,'&check_status');
1.324     albertel  671: 
1.82      ng        672:   $safehole->wrap(\&Math::Cephes::asin,$safeeval,'&asin');
                    673:   $safehole->wrap(\&Math::Cephes::acos,$safeeval,'&acos');
                    674:   $safehole->wrap(\&Math::Cephes::atan,$safeeval,'&atan');
                    675:   $safehole->wrap(\&Math::Cephes::sinh,$safeeval,'&sinh');
                    676:   $safehole->wrap(\&Math::Cephes::cosh,$safeeval,'&cosh');
                    677:   $safehole->wrap(\&Math::Cephes::tanh,$safeeval,'&tanh');
                    678:   $safehole->wrap(\&Math::Cephes::asinh,$safeeval,'&asinh');
                    679:   $safehole->wrap(\&Math::Cephes::acosh,$safeeval,'&acosh');
                    680:   $safehole->wrap(\&Math::Cephes::atanh,$safeeval,'&atanh');
                    681:   $safehole->wrap(\&Math::Cephes::erf,$safeeval,'&erf');
                    682:   $safehole->wrap(\&Math::Cephes::erfc,$safeeval,'&erfc');
                    683:   $safehole->wrap(\&Math::Cephes::j0,$safeeval,'&j0');
                    684:   $safehole->wrap(\&Math::Cephes::j1,$safeeval,'&j1');
                    685:   $safehole->wrap(\&Math::Cephes::jn,$safeeval,'&jn');
                    686:   $safehole->wrap(\&Math::Cephes::jv,$safeeval,'&jv');
                    687:   $safehole->wrap(\&Math::Cephes::y0,$safeeval,'&y0');
                    688:   $safehole->wrap(\&Math::Cephes::y1,$safeeval,'&y1');
                    689:   $safehole->wrap(\&Math::Cephes::yn,$safeeval,'&yn');
                    690:   $safehole->wrap(\&Math::Cephes::yv,$safeeval,'&yv');
1.215     albertel  691:   
                    692:   $safehole->wrap(\&Math::Cephes::bdtr  ,$safeeval,'&bdtr'  );
                    693:   $safehole->wrap(\&Math::Cephes::bdtrc ,$safeeval,'&bdtrc' );
                    694:   $safehole->wrap(\&Math::Cephes::bdtri ,$safeeval,'&bdtri' );
                    695:   $safehole->wrap(\&Math::Cephes::btdtr ,$safeeval,'&btdtr' );
                    696:   $safehole->wrap(\&Math::Cephes::chdtr ,$safeeval,'&chdtr' );
                    697:   $safehole->wrap(\&Math::Cephes::chdtrc,$safeeval,'&chdtrc');
                    698:   $safehole->wrap(\&Math::Cephes::chdtri,$safeeval,'&chdtri');
                    699:   $safehole->wrap(\&Math::Cephes::fdtr  ,$safeeval,'&fdtr'  );
                    700:   $safehole->wrap(\&Math::Cephes::fdtrc ,$safeeval,'&fdtrc' );
                    701:   $safehole->wrap(\&Math::Cephes::fdtri ,$safeeval,'&fdtri' );
                    702:   $safehole->wrap(\&Math::Cephes::gdtr  ,$safeeval,'&gdtr'  );
                    703:   $safehole->wrap(\&Math::Cephes::gdtrc ,$safeeval,'&gdtrc' );
                    704:   $safehole->wrap(\&Math::Cephes::nbdtr ,$safeeval,'&nbdtr' );
                    705:   $safehole->wrap(\&Math::Cephes::nbdtrc,$safeeval,'&nbdtrc');
                    706:   $safehole->wrap(\&Math::Cephes::nbdtri,$safeeval,'&nbdtri');
                    707:   $safehole->wrap(\&Math::Cephes::ndtr  ,$safeeval,'&ndtr'  );
                    708:   $safehole->wrap(\&Math::Cephes::ndtri ,$safeeval,'&ndtri' );
                    709:   $safehole->wrap(\&Math::Cephes::pdtr  ,$safeeval,'&pdtr'  );
                    710:   $safehole->wrap(\&Math::Cephes::pdtrc ,$safeeval,'&pdtrc' );
                    711:   $safehole->wrap(\&Math::Cephes::pdtri ,$safeeval,'&pdtri' );
                    712:   $safehole->wrap(\&Math::Cephes::stdtr ,$safeeval,'&stdtr' );
                    713:   $safehole->wrap(\&Math::Cephes::stdtri,$safeeval,'&stdtri');
                    714: 
1.383     albertel  715:   $safehole->wrap(\&Math::Cephes::Matrix::mat,$safeeval,'&mat');
                    716:   $safehole->wrap(\&Math::Cephes::Matrix::new,$safeeval,
                    717: 		  '&Math::Cephes::Matrix::new');
                    718:   $safehole->wrap(\&Math::Cephes::Matrix::coef,$safeeval,
                    719: 		  '&Math::Cephes::Matrix::coef');
                    720:   $safehole->wrap(\&Math::Cephes::Matrix::clr,$safeeval,
                    721: 		  '&Math::Cephes::Matrix::clr');
                    722:   $safehole->wrap(\&Math::Cephes::Matrix::add,$safeeval,
                    723: 		  '&Math::Cephes::Matrix::add');
                    724:   $safehole->wrap(\&Math::Cephes::Matrix::sub,$safeeval,
                    725: 		  '&Math::Cephes::Matrix::sub');
                    726:   $safehole->wrap(\&Math::Cephes::Matrix::mul,$safeeval,
                    727: 		  '&Math::Cephes::Matrix::mul');
                    728:   $safehole->wrap(\&Math::Cephes::Matrix::div,$safeeval,
                    729: 		  '&Math::Cephes::Matrix::div');
                    730:   $safehole->wrap(\&Math::Cephes::Matrix::inv,$safeeval,
                    731: 		  '&Math::Cephes::Matrix::inv');
                    732:   $safehole->wrap(\&Math::Cephes::Matrix::transp,$safeeval,
                    733: 		  '&Math::Cephes::Matrix::transp');
                    734:   $safehole->wrap(\&Math::Cephes::Matrix::simq,$safeeval,
                    735: 		  '&Math::Cephes::Matrix::simq');
                    736:   $safehole->wrap(\&Math::Cephes::Matrix::mat_to_vec,$safeeval,
                    737: 		  '&Math::Cephes::Matrix::mat_to_vec');
                    738:   $safehole->wrap(\&Math::Cephes::Matrix::vec_to_mat,$safeeval,
                    739: 		  '&Math::Cephes::Matrix::vec_to_mat');
                    740:   $safehole->wrap(\&Math::Cephes::Matrix::check,$safeeval,
                    741: 		  '&Math::Cephes::Matrix::check');
                    742:   $safehole->wrap(\&Math::Cephes::Matrix::check,$safeeval,
                    743: 		  '&Math::Cephes::Matrix::check');
                    744: 
1.215     albertel  745: #  $safehole->wrap(\&Math::Cephes::new_fract,$safeeval,'&new_fract');
                    746: #  $safehole->wrap(\&Math::Cephes::radd,$safeeval,'&radd');
                    747: #  $safehole->wrap(\&Math::Cephes::rsub,$safeeval,'&rsub');
                    748: #  $safehole->wrap(\&Math::Cephes::rmul,$safeeval,'&rmul');
                    749: #  $safehole->wrap(\&Math::Cephes::rdiv,$safeeval,'&rdiv');
                    750: #  $safehole->wrap(\&Math::Cephes::euclid,$safeeval,'&euclid');
                    751: 
1.91      ng        752:   $safehole->wrap(\&Math::Random::random_beta,$safeeval,'&math_random_beta');
                    753:   $safehole->wrap(\&Math::Random::random_chi_square,$safeeval,'&math_random_chi_square');
                    754:   $safehole->wrap(\&Math::Random::random_exponential,$safeeval,'&math_random_exponential');
                    755:   $safehole->wrap(\&Math::Random::random_f,$safeeval,'&math_random_f');
                    756:   $safehole->wrap(\&Math::Random::random_gamma,$safeeval,'&math_random_gamma');
                    757:   $safehole->wrap(\&Math::Random::random_multivariate_normal,$safeeval,'&math_random_multivariate_normal');
                    758:   $safehole->wrap(\&Math::Random::random_multinomial,$safeeval,'&math_random_multinomial');
                    759:   $safehole->wrap(\&Math::Random::random_noncentral_chi_square,$safeeval,'&math_random_noncentral_chi_square');
                    760:   $safehole->wrap(\&Math::Random::random_noncentral_f,$safeeval,'&math_random_noncentral_f');
                    761:   $safehole->wrap(\&Math::Random::random_normal,$safeeval,'&math_random_normal');
                    762:   $safehole->wrap(\&Math::Random::random_permutation,$safeeval,'&math_random_permutation');
1.93      ng        763:   $safehole->wrap(\&Math::Random::random_permuted_index,$safeeval,'&math_random_permuted_index');
1.91      ng        764:   $safehole->wrap(\&Math::Random::random_uniform,$safeeval,'&math_random_uniform');
                    765:   $safehole->wrap(\&Math::Random::random_poisson,$safeeval,'&math_random_poisson');
                    766:   $safehole->wrap(\&Math::Random::random_uniform_integer,$safeeval,'&math_random_uniform_integer');
                    767:   $safehole->wrap(\&Math::Random::random_negative_binomial,$safeeval,'&math_random_negative_binomial');
                    768:   $safehole->wrap(\&Math::Random::random_binomial,$safeeval,'&math_random_binomial');
                    769:   $safehole->wrap(\&Math::Random::random_seed_from_phrase,$safeeval,'&random_seed_from_phrase');
                    770:   $safehole->wrap(\&Math::Random::random_set_seed_from_phrase,$safeeval,'&random_set_seed_from_phrase');
                    771:   $safehole->wrap(\&Math::Random::random_get_seed,$safeeval,'&random_get_seed');
                    772:   $safehole->wrap(\&Math::Random::random_set_seed,$safeeval,'&random_set_seed');
1.305     albertel  773:   $safehole->wrap(\&Apache::lonxml::error,$safeeval,'&LONCAPA_INTERNAL_ERROR');
1.311     albertel  774:   $safehole->wrap(\&Apache::lonxml::debug,$safeeval,'&LONCAPA_INTERNAL_DEBUG');
1.322     albertel  775:   $safehole->wrap(\&Apache::caparesponse::get_sigrange,$safeeval,'&LONCAPA_INTERNAL_get_sigrange');
1.91      ng        776: 
1.82      ng        777: #need to inspect this class of ops
                    778: # $safeeval->deny(":base_orig");
1.331     albertel  779:   $safeeval->permit("require");
1.91      ng        780:   $safeinit .= ';$external::target="'.$target.'";';
1.82      ng        781:   &Apache::run::run($safeinit,$safeeval);
1.373     albertel  782:   &initialize_rndseed($safeeval);
                    783: }
1.303     albertel  784: 
1.393     albertel  785: sub clean_safespace {
                    786:     my ($safeeval) = @_;
                    787:     delete_package_recurse($safeeval->{Root});
                    788: }
                    789: 
                    790: sub delete_package_recurse {
                    791:      my ($package) = @_;
                    792:      my @subp;
                    793:      {
                    794: 	 no strict 'refs';
                    795: 	 while (my ($key,$val) = each(%{*{"$package\::"}})) {
                    796: 	     if (!defined($val)) { next; }
                    797: 	     local (*ENTRY) = $val;
                    798: 	     if (defined *ENTRY{HASH} && $key =~ /::$/ &&
                    799: 		 $key ne "main::" && $key ne "<none>::")
                    800: 	     {
                    801: 		 my ($p) = $package ne "main" ? "$package\::" : "";
                    802: 		 ($p .= $key) =~ s/::$//;
                    803: 		 push(@subp,$p);
                    804: 	     }
                    805: 	 }
                    806:      }
                    807:      foreach my $p (@subp) {
                    808: 	 delete_package_recurse($p);
                    809:      }
                    810:      Symbol::delete_package($package);
                    811: }
                    812: 
1.373     albertel  813: sub initialize_rndseed {
                    814:     my ($safeeval)=@_;
                    815:     my $rndseed;
                    816:     my ($symb,$courseid,$domain,$name) = &Apache::lonxml::whichuser();
                    817:     $rndseed=&Apache::lonnet::rndseed($symb,$courseid,$domain,$name);
                    818:     my $safeinit = '$external::randomseed="'.$rndseed.'";';
                    819:     &Apache::lonxml::debug("Setting rndseed to $rndseed");
                    820:     &Apache::run::run($safeinit,$safeeval);
1.207     albertel  821: }
                    822: 
                    823: sub default_homework_load {
                    824:     my ($safeeval)=@_;
                    825:     &Apache::lonxml::debug('Loading default_homework');
                    826:     my $default=&Apache::lonnet::getfile('/home/httpd/html/res/adm/includes/default_homework.lcpm');
1.241     albertel  827:     if ($default eq -1) {
1.207     albertel  828: 	&Apache::lonxml::error("<b>Unable to find <i>default_homework.lcpm</i></b>");
                    829:     } else {
                    830: 	&Apache::run::run($default,$safeeval);
                    831: 	$Apache::lonxml::default_homework_loaded=1;
                    832:     }
1.17      albertel  833: }
                    834: 
1.358     albertel  835: {
                    836:     my $alarm_depth;
                    837:     sub init_alarm {
                    838: 	alarm(0);
                    839: 	$alarm_depth=0;
                    840:     }
                    841: 
                    842:     sub start_alarm {
                    843: 	if ($alarm_depth<1) {
                    844: 	    my $old=alarm($Apache::lonnet::perlvar{'lonScriptTimeout'});
                    845: 	    if ($old) {
                    846: 		&Apache::lonxml::error("Cancelled an alarm of $old, this shouldn't occur.");
                    847: 	    }
                    848: 	}
                    849: 	$alarm_depth++;
                    850:     }
                    851: 
                    852:     sub end_alarm {
                    853: 	$alarm_depth--;
                    854: 	if ($alarm_depth<1) { alarm(0); }
                    855:     }
                    856: }
1.328     albertel  857: my $metamode_was;
1.55      albertel  858: sub startredirection {
1.328     albertel  859:     if (!$Apache::lonxml::redirection) {
                    860: 	$metamode_was=$Apache::lonxml::metamode;
                    861:     }
                    862:     $Apache::lonxml::metamode=0;
                    863:     $Apache::lonxml::redirection++;
                    864:     push (@Apache::lonxml::outputstack, '');
1.55      albertel  865: }
                    866: 
                    867: sub endredirection {
1.328     albertel  868:     if (!$Apache::lonxml::redirection) {
1.380     www       869: 	&Apache::lonxml::error("Endredirection was called before a startredirection, perhaps you have unbalanced tags. Some debugging information:".join ":",caller);
1.328     albertel  870: 	return '';
                    871:     }
                    872:     $Apache::lonxml::redirection--;
                    873:     if (!$Apache::lonxml::redirection) {
                    874: 	$Apache::lonxml::metamode=$metamode_was;
                    875:     }
                    876:     pop @Apache::lonxml::outputstack;
1.97      albertel  877: }
                    878: 
                    879: sub end_tag {
                    880:   my ($tagstack,$parstack,$token)=@_;
                    881:   pop(@$tagstack);
                    882:   pop(@$parstack);
                    883:   &decreasedepth($token);
1.55      albertel  884: }
                    885: 
1.17      albertel  886: sub initdepth {
                    887:   @Apache::lonxml::depthcounter=();
                    888:   $Apache::lonxml::depth=-1;
                    889:   $Apache::lonxml::olddepth=-1;
                    890: }
                    891: 
1.339     albertel  892: my @timers;
                    893: my $lasttime;
1.17      albertel  894: sub increasedepth {
1.19      albertel  895:   my ($token) = @_;
1.17      albertel  896:   $Apache::lonxml::depth++;
                    897:   $Apache::lonxml::depthcounter[$Apache::lonxml::depth]++;
                    898:   if ($Apache::lonxml::depthcounter[$Apache::lonxml::depth]==1) {
                    899:     $Apache::lonxml::olddepth=$Apache::lonxml::depth;
                    900:   }
1.340     albertel  901:   my $time;
                    902:   if ($Apache::lonxml::debug eq "1") {
                    903:       push(@timers,[&gettimeofday()]);
                    904:       $time=&tv_interval($lasttime);
                    905:       $lasttime=[&gettimeofday()];
                    906:   }
1.339     albertel  907:   my $spacing='  'x($Apache::lonxml::depth-1);
1.42      albertel  908:   my $curdepth=join('_',@Apache::lonxml::depthcounter);
1.339     albertel  909:   &Apache::lonxml::debug("s$spacing$Apache::lonxml::depth : $Apache::lonxml::olddepth : $curdepth : $token->[1] : $time : \n");
1.54      albertel  910: #print "<br />s $Apache::lonxml::depth : $Apache::lonxml::olddepth : $curdepth : $token->[1]\n";
1.17      albertel  911: }
                    912: 
                    913: sub decreasedepth {
1.19      albertel  914:   my ($token) = @_;
1.17      albertel  915:   $Apache::lonxml::depth--;
1.36      albertel  916:   if ($Apache::lonxml::depth<$Apache::lonxml::olddepth-1) {
                    917:     $#Apache::lonxml::depthcounter--;
                    918:     $Apache::lonxml::olddepth=$Apache::lonxml::depth+1;
                    919:   }
1.43      albertel  920:   if (  $Apache::lonxml::depth < -1) {
1.280     www       921:     &Apache::lonxml::warning(&mt("Missing tags, unable to properly run file."));
1.43      albertel  922:     $Apache::lonxml::depth='-1';
                    923:   }
1.340     albertel  924:   my ($timer,$time);
                    925:   if ($Apache::lonxml::debug eq "1") {
                    926:       $timer=pop(@timers);
                    927:       $time=&tv_interval($lasttime);
                    928:       $lasttime=[&gettimeofday()];
                    929:   }
1.339     albertel  930:   my $spacing='  'x$Apache::lonxml::depth;
1.42      albertel  931:   my $curdepth=join('_',@Apache::lonxml::depthcounter);
1.339     albertel  932:   &Apache::lonxml::debug("e$spacing$Apache::lonxml::depth : $Apache::lonxml::olddepth : $curdepth : $token->[1] : $time : ".&tv_interval($timer)."\n");
1.54      albertel  933: #print "<br />e $Apache::lonxml::depth : $Apache::lonxml::olddepth : $token->[1] : $curdepth\n";
1.1       sakharuk  934: }
1.19      albertel  935: 
1.399     albertel  936: sub get_id {
                    937:     my ($parstack,$safeeval)=@_;
                    938:     my $id= &Apache::lonxml::get_param('id',$parstack,$safeeval);
                    939:     if ($env{'request.state'} eq 'construct' && $id =~ /(\.|_)/) {
                    940: 	&error(&mt("IDs are not allowed to contain &quot;<tt>_</tt>&quot; or &quot;<tt>.</tt>&quot;"));
                    941:     }
                    942:     if ($id =~ /^\s*$/) { $id = $Apache::lonxml::curdepth; }
                    943:     return $id;
                    944: }
                    945: 
1.180     albertel  946: sub get_all_text_unbalanced {
1.190     albertel  947: #there is a copy of this in lonpublisher.pm
1.326     albertel  948:     my($tag,$pars)= @_;
                    949:     my $token;
                    950:     my $result='';
                    951:     $tag='<'.$tag.'>';
                    952:     while ($token = $$pars[-1]->get_token) {
                    953: 	if (($token->[0] eq 'T')||($token->[0] eq 'C')||($token->[0] eq 'D')) {
1.386     albertel  954: 	    if ($token->[0] eq 'T' && $token->[2]) {
1.382     albertel  955: 		$result.='<![CDATA['.$token->[1].']]>';
                    956: 	    } else {
                    957: 		$result.=$token->[1];
                    958: 	    }
1.326     albertel  959: 	} elsif ($token->[0] eq 'PI') {
                    960: 	    $result.=$token->[2];
                    961: 	} elsif ($token->[0] eq 'S') {
                    962: 	    $result.=$token->[4];
                    963: 	} elsif ($token->[0] eq 'E')  {
                    964: 	    $result.=$token->[2];
                    965: 	}
                    966: 	if ($result =~ /\Q$tag\E/is) {
                    967: 	    ($result,my $redo)=$result =~ /(.*)\Q$tag\E(.*)/is;
                    968: 	    #&Apache::lonxml::debug('Got a winner with leftovers ::'.$2);
                    969: 	    #&Apache::lonxml::debug('Result is :'.$1);
                    970: 	    $redo=$tag.$redo;
                    971: 	    &Apache::lonxml::newparser($pars,\$redo);
                    972: 	    last;
                    973: 	}
                    974:     }
                    975:     return $result
1.204     albertel  976: }
                    977: 
                    978: sub increment_counter {
1.247     albertel  979:     my ($increment) = @_;
1.289     sakharuk  980:     if (defined($increment) && $increment gt 0) {
                    981: 	$Apache::lonxml::counter+=$increment;
                    982:     } else {
                    983: 	$Apache::lonxml::counter++;
1.247     albertel  984:     }
1.289     sakharuk  985:     $Apache::lonxml::counter_changed=1;
1.204     albertel  986: }
                    987: 
                    988: sub init_counter {
1.391     albertel  989:     if ($env{'request.state'} eq 'construct') {
                    990: 	$Apache::lonxml::counter=1;
                    991: 	$Apache::lonxml::counter_changed=1;
                    992:     } elsif (defined($env{'form.counter'})) {
1.372     albertel  993: 	$Apache::lonxml::counter=$env{'form.counter'};
1.247     albertel  994: 	$Apache::lonxml::counter_changed=0;
1.237     sakharuk  995:     } else {
1.204     albertel  996: 	$Apache::lonxml::counter=1;
1.247     albertel  997: 	$Apache::lonxml::counter_changed=1;
1.204     albertel  998:     }
                    999: }
                   1000: 
                   1001: sub store_counter {
                   1002:     &Apache::lonnet::appenv(('form.counter' => $Apache::lonxml::counter));
1.401     albertel 1003:     $Apache::lonxml::counter_changed=0;
1.204     albertel 1004:     return '';
1.180     albertel 1005: }
                   1006: 
1.398     albertel 1007: {
                   1008:     my $state;
                   1009:     sub clear_problem_counter {
                   1010: 	undef($state);
                   1011: 	&Apache::lonnet::delenv('form.counter');
                   1012: 	&Apache::lonxml::init_counter();
                   1013: 	&Apache::lonxml::store_counter();
                   1014:     }
                   1015: 
                   1016:     sub remember_problem_counter {
1.415.2.1! albertel 1017: 	&Apache::lonnet::transfer_profile_to_env(undef,undef,1);
1.398     albertel 1018: 	$state = $env{'form.counter'};
                   1019:     }
                   1020: 
                   1021:     sub restore_problem_counter {
                   1022: 	if (defined($state)) {
                   1023: 	    &Apache::lonnet::appenv(('form.counter' => $state));
                   1024: 	}
                   1025:     }
1.401     albertel 1026:     sub get_problem_counter {
                   1027: 	if ($Apache::lonxml::counter_changed) { &store_counter() }
1.415.2.1! albertel 1028: 	&Apache::lonnet::transfer_profile_to_env(undef,undef,1);
1.401     albertel 1029: 	return $env{'form.counter'};
                   1030:     }
1.398     albertel 1031: }
                   1032: 
1.19      albertel 1033: sub get_all_text {
1.270     albertel 1034:     my($tag,$pars,$style)= @_;
                   1035:     my $gotfullstack=1;
                   1036:     if (ref($pars) ne 'ARRAY') {
                   1037: 	$gotfullstack=0;
                   1038: 	$pars=[$pars];
                   1039:     }
                   1040:     if (ref($style) ne 'HASH') {
                   1041: 	$style={};
                   1042:     }
                   1043:     my $depth=0;
                   1044:     my $token;
                   1045:     my $result='';
                   1046:     if ( $tag =~ m:^/: ) { 
                   1047: 	my $tag=substr($tag,1); 
                   1048: 	#&Apache::lonxml::debug("have:$tag:");
                   1049: 	my $top_empty=0;
                   1050: 	while (($depth >=0) && ($#$pars > -1) && (!$top_empty)) {
                   1051: 	    while (($depth >=0) && ($token = $$pars[-1]->get_token)) {
                   1052: 		#&Apache::lonxml::debug("e token:$token->[0]:$depth:$token->[1]:".$#$pars.":".$#Apache::lonxml::pwd);
                   1053: 		if (($token->[0] eq 'T')||($token->[0] eq 'C')||($token->[0] eq 'D')) {
1.382     albertel 1054: 		    if ($token->[2]) {
                   1055: 			$result.='<![CDATA['.$token->[1].']]>';
                   1056: 		    } else {
                   1057: 			$result.=$token->[1];
                   1058: 		    }
1.270     albertel 1059: 		} elsif ($token->[0] eq 'PI') {
                   1060: 		    $result.=$token->[2];
                   1061: 		} elsif ($token->[0] eq 'S') {
1.316     albertel 1062: 		    if ($token->[1] =~ /^\Q$tag\E$/i) { $depth++; }
                   1063: 		    if ($token->[1] =~ /^LONCAPA_INTERNAL_TURN_STYLE_ON$/) { $Apache::lonxml::usestyle=1; }
                   1064: 		    if ($token->[1] =~ /^LONCAPA_INTERNAL_TURN_STYLE_OFF$/) { $Apache::lonxml::usestyle=0; }
1.270     albertel 1065: 		    $result.=$token->[4];
                   1066: 		} elsif ($token->[0] eq 'E')  {
1.316     albertel 1067: 		    if ( $token->[1] =~ /^\Q$tag\E$/i) { $depth--; }
1.270     albertel 1068: 		    #skip sending back the last end tag
1.283     albertel 1069: 		    if ($depth == 0 && exists($$style{'/'.$token->[1]}) && $Apache::lonxml::usestyle) {
1.270     albertel 1070: 			my $string=
                   1071: 			    '<LONCAPA_INTERNAL_TURN_STYLE_OFF end="yes" />'.
                   1072: 				$$style{'/'.$token->[1]}.
                   1073: 				    $token->[2].
                   1074: 					'<LONCAPA_INTERNAL_TURN_STYLE_ON />';
                   1075: 			&Apache::lonxml::newparser($pars,\$string);
                   1076: 			#&Apache::lonxml::debug("reParsing $string");
                   1077: 			next;
                   1078: 		    }
                   1079: 		    if ($depth > -1) {
                   1080: 			$result.=$token->[2];
                   1081: 		    } else {
                   1082: 			$$pars[-1]->unget_token($token);
                   1083: 		    }
                   1084: 		}
                   1085: 	    }
                   1086: 	    if (($depth >=0) && ($#$pars == 0) ) { $top_empty=1; }
                   1087: 	    if (($depth >=0) && ($#$pars > 0) ) {
                   1088: 		pop(@$pars);
                   1089: 		pop(@Apache::lonxml::pwd);
                   1090: 	    }
                   1091: 	}
                   1092: 	if ($top_empty && $depth >= 0) {
                   1093: 	    #never found the end tag ran out of text, throw error send back blank
                   1094: 	    &error('Never found end tag for &lt;'.$tag.
                   1095: 		   '&gt; current string <pre>'.
1.314     albertel 1096: 		   &HTML::Entities::encode($result,'<>&"').
1.270     albertel 1097: 		   '</pre>');
                   1098: 	    if ($gotfullstack) {
                   1099: 		my $newstring='</'.$tag.'>'.$result;
                   1100: 		&Apache::lonxml::newparser($pars,\$newstring);
                   1101: 	    }
                   1102: 	    $result='';
                   1103: 	}
                   1104:     } else {
                   1105: 	while ($#$pars > -1) {
                   1106: 	    while ($token = $$pars[-1]->get_token) {
                   1107: 		#&Apache::lonxml::debug("s token:$token->[0]:$depth:$token->[1]");
                   1108: 		if (($token->[0] eq 'T')||($token->[0] eq 'C')||
                   1109: 		    ($token->[0] eq 'D')) {
1.382     albertel 1110: 		    if ($token->[2]) {
                   1111: 			$result.='<![CDATA['.$token->[1].']]>';
                   1112: 		    } else {
                   1113: 			$result.=$token->[1];
                   1114: 		    }
1.270     albertel 1115: 		} elsif ($token->[0] eq 'PI') {
                   1116: 		    $result.=$token->[2];
                   1117: 		} elsif ($token->[0] eq 'S') {
1.316     albertel 1118: 		    if ( $token->[1] =~ /^\Q$tag\E$/i) {
1.270     albertel 1119: 			$$pars[-1]->unget_token($token); last;
                   1120: 		    } else {
                   1121: 			$result.=$token->[4];
                   1122: 		    }
1.316     albertel 1123: 		    if ($token->[1] =~ /^LONCAPA_INTERNAL_TURN_STYLE_ON$/) { $Apache::lonxml::usestyle=1; }
                   1124: 		    if ($token->[1] =~ /^LONCAPA_INTERNAL_TURN_STYLE_OFF$/) { $Apache::lonxml::usestyle=0; }
1.270     albertel 1125: 		} elsif ($token->[0] eq 'E')  {
                   1126: 		    $result.=$token->[2];
                   1127: 		}
                   1128: 	    }
                   1129: 	    if (($#$pars > 0) ) {
                   1130: 		pop(@$pars);
                   1131: 		pop(@Apache::lonxml::pwd);
                   1132: 	    } else { last; }
                   1133: 	}
                   1134:     }
                   1135:     #&Apache::lonxml::debug("Exit:$result:");
                   1136:     return $result
1.19      albertel 1137: }
                   1138: 
1.23      albertel 1139: sub newparser {
                   1140:   my ($parser,$contentref,$dir) = @_;
1.167     albertel 1141:   push (@$parser,HTML::LCParser->new($contentref));
1.365     albertel 1142:   $$parser[-1]->xml_mode(1);
                   1143:   $$parser[-1]->marked_sections(1);
1.23      albertel 1144:   if ( $dir eq '' ) {
                   1145:     push (@Apache::lonxml::pwd, $Apache::lonxml::pwd[$#Apache::lonxml::pwd]);
                   1146:   } else {
                   1147:     push (@Apache::lonxml::pwd, $dir);
                   1148:   } 
                   1149: }
1.1       sakharuk 1150: 
1.8       albertel 1151: sub parstring {
                   1152:   my ($token) = @_;
                   1153:   my $temp='';
1.142     albertel 1154:   foreach (@{$token->[3]}) {
1.35      www      1155:     unless ($_=~/\W/) {
1.42      albertel 1156:       my $val=$token->[2]->{$_};
1.231     albertel 1157:       $val =~ s/([\%\@\\\"\'])/\\$1/g;
1.342     albertel 1158:       $val =~ s/(\$[^{a-zA-Z_])/\\$1/g;
1.346     albertel 1159:       $val =~ s/(\$)$/\\$1/;
1.51      albertel 1160:       #if ($val =~ m/^[\%\@]/) { $val="\\".$val; }
1.267     sakharuk 1161:       $temp .= "my \$$_=\"$val\";";
1.20      albertel 1162:     }
1.142     albertel 1163:   }
1.8       albertel 1164:   return $temp;
                   1165: }
1.22      albertel 1166: 
1.384     albertel 1167: sub extlink {
                   1168:     my ($res,$exact)=@_;
                   1169:     if (!$exact) {
                   1170: 	$res=&Apache::lonnet::hreflocation($Apache::lonxml::pwd[-1],$res);
                   1171:     }
                   1172:     push(@Apache::lonxml::extlinks,$res)	 
                   1173: }
                   1174: 
1.34      www      1175: sub writeallows {
1.126     www      1176:     unless ($#extlinks>=0) { return; }
1.377     albertel 1177:     my $thisurl = &Apache::lonnet::clutter(shift);
1.372     albertel 1178:     if ($env{'httpref.'.$thisurl}) {
                   1179: 	$thisurl=$env{'httpref.'.$thisurl};
1.111     www      1180:     }
1.34      www      1181:     my $thisdir=$thisurl;
                   1182:     $thisdir=~s/\/[^\/]+$//;
                   1183:     my %httpref=();
1.142     albertel 1184:     foreach (@extlinks) {
1.34      www      1185:        $httpref{'httpref.'.
1.125     www      1186:  	        &Apache::lonnet::hreflocation($thisdir,$_)}=$thisurl;
1.142     albertel 1187:     }
1.126     www      1188:     @extlinks=();
1.34      www      1189:     &Apache::lonnet::appenv(%httpref);
                   1190: }
                   1191: 
1.281     albertel 1192: sub register_ssi {
                   1193:     my ($url,%form)=@_;
                   1194:     push (@Apache::lonxml::ssi_info,{'url'=>$url,'form'=>\%form});
                   1195:     return '';
                   1196: }
                   1197: 
                   1198: sub do_registered_ssi {
                   1199:     foreach my $info (@Apache::lonxml::ssi_info) {
                   1200: 	my %form=%{ $info->{'form'}};
                   1201: 	my $url=$info->{'url'};
                   1202: 	&Apache::lonnet::ssi($url,%form);
                   1203:     }
                   1204: }
1.66      www      1205: #
                   1206: # Afterburner handles anchors, highlights and links
                   1207: #
                   1208: sub afterburn {
                   1209:     my $result=shift;
1.154     albertel 1210:     &Apache::loncommon::get_unprocessed_cgi($ENV{'QUERY_STRING'},
                   1211: 					    ['highlight','anchor','link']);
1.372     albertel 1212:     if ($env{'form.highlight'}) {
                   1213:        foreach (split(/\,/,$env{'form.highlight'})) {
1.66      www      1214:            my $anchorname=$_;
                   1215: 	   my $matchthis=$anchorname;
                   1216:            $matchthis=~s/\_+/\\s\+/g;
1.317     albertel 1217:            $result=~s/(\Q$matchthis\E)/\<font color=\"red\"\>$1\<\/font\>/gs;
1.142     albertel 1218:        }
1.66      www      1219:     }
1.372     albertel 1220:     if ($env{'form.link'}) {
                   1221:        foreach (split(/\,/,$env{'form.link'})) {
1.66      www      1222:            my ($anchorname,$linkurl)=split(/\>/,$_);
                   1223: 	   my $matchthis=$anchorname;
                   1224:            $matchthis=~s/\_+/\\s\+/g;
1.317     albertel 1225:            $result=~s/(\Q$matchthis\E)/\<a href=\"$linkurl\"\>$1\<\/a\>/gs;
1.142     albertel 1226:        }
1.66      www      1227:     }
1.372     albertel 1228:     if ($env{'form.anchor'}) {
                   1229:         my $anchorname=$env{'form.anchor'};
1.66      www      1230: 	my $matchthis=$anchorname;
                   1231:         $matchthis=~s/\_+/\\s\+/g;
1.317     albertel 1232:         $result=~s/(\Q$matchthis\E)/\<a name=\"$anchorname\"\>$1\<\/a\>/s;
1.66      www      1233:         $result.=(<<"ENDSCRIPT");
1.226     albertel 1234: <script type="text/javascript">
1.66      www      1235:     document.location.hash='$anchorname';
                   1236: </script>
                   1237: ENDSCRIPT
                   1238:     }
                   1239:     return $result;
                   1240: }
                   1241: 
1.79      www      1242: sub storefile {
                   1243:     my ($file,$contents)=@_;
1.290     albertel 1244:     &Apache::lonnet::correct_line_ends(\$contents);
1.79      www      1245:     if (my $fh=Apache::File->new('>'.$file)) {
                   1246: 	print $fh $contents;
                   1247:         $fh->close();
1.271     www      1248:         return 1;
1.147     albertel 1249:     } else {
1.271     www      1250: 	&warning("Unable to save file $file");
                   1251: 	return 0;
1.79      www      1252:     }
                   1253: }
                   1254: 
1.151     albertel 1255: sub createnewhtml {
1.321     www      1256:     my $title=&mt('Title of document goes here');
                   1257:     my $body=&mt('Body of document goes here');
                   1258:     my $filecontents=(<<SIMPLECONTENT);
1.78      www      1259: <html>
                   1260: <head>
1.321     www      1261: <title>$title</title>
1.78      www      1262: </head>
                   1263: <body bgcolor="#FFFFFF">
1.321     www      1264: $body
1.78      www      1265: </body>
                   1266: </html>
                   1267: SIMPLECONTENT
1.321     www      1268:     return $filecontents;
1.151     albertel 1269: }
                   1270: 
1.274     albertel 1271: sub createnewsty {
                   1272:   my $filecontents=(<<SIMPLECONTENT);
                   1273: <definetag name="">
                   1274:     <render>
                   1275:        <web></web>
                   1276:        <tex></tex>
                   1277:     </render>
                   1278: </definetag>
                   1279: SIMPLECONTENT
                   1280:   return $filecontents;
                   1281: }
                   1282: 
1.147     albertel 1283: 
1.151     albertel 1284: sub inserteditinfo {
1.274     albertel 1285:       my ($result,$filecontents,$filetype)=@_;
1.314     albertel 1286:       $filecontents = &HTML::Entities::encode($filecontents,'<>&"');
1.147     albertel 1287: #      my $editheader='<a href="#editsection">Edit below</a><hr />';
1.274     albertel 1288:       my $xml_help = '';
1.321     www      1289:       my $initialize='';
1.274     albertel 1290:       if ($filetype eq 'html') {
1.323     www      1291: 	  my $addbuttons=&Apache::lonhtmlcommon::htmlareaaddbuttons();
1.410     albertel 1292: 	  $initialize=&Apache::lonhtmlcommon::spellheader();
1.347     albertel 1293: 	  if (!&Apache::lonhtmlcommon::htmlareablocked() &&
                   1294: 	      &Apache::lonhtmlcommon::htmlareabrowser()) {
                   1295: 	      $initialize.=(<<FULLPAGE);
1.321     www      1296: <script type="text/javascript">
1.323     www      1297: $addbuttons
                   1298: 
1.321     www      1299:     HTMLArea.loadPlugin("FullPage");
                   1300: 
                   1301:     function initDocument() {
1.323     www      1302: 	var editor=new HTMLArea("filecont",config);
1.321     www      1303: 	editor.registerPlugin(FullPage);
                   1304: 	editor.generate();
                   1305:     }
                   1306: </script>
                   1307: FULLPAGE
1.347     albertel 1308:           } else {
                   1309: 	      $initialize.=(<<FULLPAGE);
                   1310: <script type="text/javascript">
                   1311: $addbuttons
                   1312:     function initDocument() {
                   1313:     }
                   1314: </script>
                   1315: FULLPAGE
                   1316: 	  }
1.321     www      1317:           $result=~s/\<body([^\>]*)\>/\<body onload="initDocument()" $1\>/i;
                   1318: 	  $xml_help=&Apache::loncommon::helpLatexCheatsheet();
1.274     albertel 1319:       }
                   1320:       my $cleanbut = '';
1.374     www      1321: 
1.254     albertel 1322:       my $titledisplay=&display_title();
1.280     www      1323:       my %lt=&Apache::lonlocal::texthash('st' => 'Save this',
                   1324: 					 'vi' => 'View',
                   1325: 					 'ed' => 'Edit');
1.161     albertel 1326:       my $buttons=(<<BUTTONS);
1.274     albertel 1327: $cleanbut
1.304     matthew  1328: <input type="submit" name="savethisfile" accesskey="s"  value="$lt{'st'}" />
                   1329: <input type="submit" name="viewmode" accesskey="v" value="$lt{'vi'}" />
1.161     albertel 1330: BUTTONS
1.333     www      1331:       $buttons.=&Apache::lonhtmlcommon::spelllink('xmledit','filecont');
1.78      www      1332:       my $editfooter=(<<ENDFOOTER);
1.321     www      1333: $initialize
1.78      www      1334: <hr />
                   1335: <a name="editsection" />
1.333     www      1336: <form method="post" name="xmledit">
1.240     albertel 1337: $xml_help
1.280     www      1338: <input type="hidden" name="editmode" value="$lt{'ed'}" />
1.170     www      1339: $buttons<br />
1.366     albertel 1340: <textarea style="width:100%" cols="80" rows="44" name="filecont" id="filecont">$filecontents</textarea>
1.170     www      1341: <br />$buttons
1.78      www      1342: <br />
                   1343: </form>
1.254     albertel 1344: $titledisplay
1.321     www      1345: </body>
1.78      www      1346: ENDFOOTER
1.147     albertel 1347: #      $result=~s/(\<body[^\>]*\>)/$1$editheader/is;
1.78      www      1348:       $result=~s/(\<\/body\>)/$editfooter/is;
                   1349:       return $result;
                   1350: }
                   1351: 
1.152     albertel 1352: sub get_target {
1.372     albertel 1353:   my $viewgrades=&Apache::lonnet::allowed('vgr',$env{'request.course.id'});
                   1354:   if ( $env{'request.state'} eq 'published') {
                   1355:     if ( defined($env{'form.grade_target'})
1.152     albertel 1356: 	 && ($viewgrades == 'F' )) {
1.372     albertel 1357:       return ($env{'form.grade_target'});
                   1358:     } elsif (defined($env{'form.grade_target'})) {
                   1359:       if (($env{'form.grade_target'} eq 'web') ||
                   1360: 	  ($env{'form.grade_target'} eq 'tex') ) {
                   1361: 	return $env{'form.grade_target'}
1.153     albertel 1362:       } else {
                   1363: 	return 'web';
                   1364:       }
1.152     albertel 1365:     } else {
                   1366:       return 'web';
                   1367:     }
1.372     albertel 1368:   } elsif ($env{'request.state'} eq 'construct') {
                   1369:     if ( defined($env{'form.grade_target'})) {
                   1370:       return ($env{'form.grade_target'});
1.152     albertel 1371:     } else {
                   1372:       return 'web';
                   1373:     }
                   1374:   } else {
                   1375:     return 'web';
                   1376:   }
                   1377: }
                   1378: 
1.24      sakharuk 1379: sub handler {
1.255     sakharuk 1380:     my $request=shift;
                   1381:     
                   1382:     my $target=&get_target();
                   1383:     
1.372     albertel 1384:     $Apache::lonxml::debug=$env{'user.debug'};
1.255     sakharuk 1385:     
1.364     albertel 1386:     &Apache::loncommon::content_type($request,'text/html');
1.255     sakharuk 1387:     &Apache::loncommon::no_cache($request);
1.372     albertel 1388:     if ($env{'request.state'} eq 'published') {
1.363     albertel 1389: 	$request->set_last_modified(&Apache::lonnet::metadata($request->uri,
                   1390: 							      'lastrevisiondate'));
                   1391:     }
1.255     sakharuk 1392:     $request->send_http_header;
                   1393:     
                   1394:     return OK if $request->header_only;
1.68      www      1395: 
                   1396: 
1.255     sakharuk 1397:     my $file=&Apache::lonnet::filelocation("",$request->uri);
1.274     albertel 1398:     my $filetype;
                   1399:     if ($file =~ /\.sty$/) {
                   1400: 	$filetype='sty';
                   1401:     } else {
                   1402: 	$filetype='html';
                   1403:     }
1.78      www      1404: #
                   1405: # Edit action? Save file.
                   1406: #
1.372     albertel 1407:     unless ($env{'request.state'} eq 'published') {
1.374     www      1408: 	if ($env{'form.savethisfile'}) {
1.372     albertel 1409: 	    if (&storefile($file,$env{'form.filecont'})) {
1.309     albertel 1410: 		&Apache::lonxml::info("<font COLOR=\"#0000FF\">".
                   1411: 				      &mt('Updated').": ".
                   1412: 				      &Apache::lonlocal::locallocaltime(time).
                   1413: 				      " </font>");
1.271     www      1414: 	    } 
1.255     sakharuk 1415: 	}
                   1416:     }
                   1417:     my %mystyle;
                   1418:     my $result = '';
                   1419:     my $filecontents=&Apache::lonnet::getfile($file);
                   1420:     if ($filecontents eq -1) {
1.402     albertel 1421: 	my $start_page=&Apache::loncommon::start_page('File Error');
1.412     albertel 1422: 	my $end_page=&Apache::loncommon::end_page();
1.284     www      1423: 	my $fnf=&mt('File not found');
1.255     sakharuk 1424: 	$result=(<<ENDNOTFOUND);
1.402     albertel 1425: $start_page
1.284     www      1426: <b>$fnf: $file</b>
1.402     albertel 1427: $end_page
1.78      www      1428: ENDNOTFOUND
1.343     albertel 1429:         $filecontents='';
1.372     albertel 1430: 	if ($env{'request.state'} ne 'published') {
1.274     albertel 1431: 	    if ($filetype eq 'sty') {
                   1432: 		$filecontents=&createnewsty();
                   1433: 	    } else {
                   1434: 		$filecontents=&createnewhtml();
                   1435: 	    }
1.372     albertel 1436: 	    $env{'form.editmode'}='Edit'; #force edit mode
1.255     sakharuk 1437: 	}
                   1438:     } else {
1.372     albertel 1439: 	unless ($env{'request.state'} eq 'published') {
1.343     albertel 1440: 	    if ($filecontents=~/BEGIN LON-CAPA Internal/) {
1.381     www      1441: 		&Apache::lonxml::error(&mt('This file appears to be a rendering of a LON-CAPA resource. If this is correct, this resource will act very oddly and incorrectly.'));
1.343     albertel 1442: 	    }
1.264     www      1443: #
                   1444: # we are in construction space, see if edit mode forced
1.385     albertel 1445:             &Apache::loncommon::get_unprocessed_cgi($ENV{'QUERY_STRING'},
                   1446: 						    ['editmode']);
1.255     sakharuk 1447: 	}
1.372     albertel 1448: 	if (!$env{'form.editmode'} || $env{'form.viewmode'}) {
1.255     sakharuk 1449: 	    $result = &Apache::lonxml::xmlparse($request,$target,$filecontents,
                   1450: 						'',%mystyle);
1.368     albertel 1451: 	    undef($Apache::lonhomework::parsing_a_task);
1.385     albertel 1452: 	    &Apache::loncommon::get_unprocessed_cgi($ENV{'QUERY_STRING'},
                   1453: 						    ['rawmode']);
1.395     albertel 1454: 	    if ($env{'form.rawmode'}) { $result = $filecontents; }
1.255     sakharuk 1455: 	}
1.147     albertel 1456:     }
1.255     sakharuk 1457:     
1.78      www      1458: #
                   1459: # Edit action? Insert editing commands
                   1460: #
1.372     albertel 1461:     unless ($env{'request.state'} eq 'published') {
                   1462: 	if ($env{'form.editmode'} && (!($env{'form.viewmode'}))) {
1.255     sakharuk 1463: 	    my $displayfile=$request->uri;
                   1464: 	    $displayfile=~s/^\/[^\/]*//;
1.402     albertel 1465: 	    my %options = ();
                   1466: 	    if ($env{'environment.remote'} ne 'off') {
                   1467: 		$options{'bgcolor'}   = '#FFFFFF';
1.349     albertel 1468: 	    }
1.402     albertel 1469: 	    my $start_page = &Apache::loncommon::start_page(undef,undef,
                   1470: 							    \%options);
                   1471: 	    $result=$start_page.
1.309     albertel 1472: 		&Apache::lonxml::message_location().'<h3>'.
                   1473: 		$displayfile.
1.402     albertel 1474: 		'</h3>'.&Apache::loncommon::end_page();
1.274     albertel 1475: 	    $result=&inserteditinfo($result,$filecontents,$filetype);
1.255     sakharuk 1476: 	}
1.147     albertel 1477:     }
1.402     albertel 1478:     if ($filetype eq 'html') { &writeallows($request->uri); }
1.274     albertel 1479: 	
1.255     sakharuk 1480:     
1.309     albertel 1481:     &Apache::lonxml::add_messages(\$result);
1.255     sakharuk 1482:     $request->print($result);
                   1483:     
                   1484:     return OK;
1.253     albertel 1485: }
                   1486: 
                   1487: sub display_title {
                   1488:     my $result;
1.372     albertel 1489:     if ($env{'request.state'} eq 'construct') {
1.253     albertel 1490: 	my $title=&Apache::lonnet::gettitle();
                   1491: 	if (!defined($title) || $title eq '') {
1.372     albertel 1492: 	    $title = $env{'request.filename'};
1.253     albertel 1493: 	    $title = substr($title, rindex($title, '/') + 1);
                   1494: 	}
                   1495: 	$result = "<script type='text/javascript'>top.document.title = '$title - LON-CAPA Construction Space';</script>";
                   1496:     }
                   1497:     return $result;
1.24      sakharuk 1498: }
1.147     albertel 1499: 
1.22      albertel 1500: sub debug {
1.298     albertel 1501:     if ($Apache::lonxml::debug eq "1") {
                   1502: 	$|=1;
1.300     albertel 1503: 	my $request=$Apache::lonxml::request;
1.388     albertel 1504: 	if (!$request) {
                   1505: 	    eval { $request=Apache->request; };
                   1506: 	}
                   1507: 	if (!$request) {
                   1508: 	    eval { $request=Apache2::RequestUtil->request; };
                   1509: 	}
1.314     albertel 1510: 	$request->print('<font size="-2"><pre>DEBUG:'.&HTML::Entities::encode($_[0],'<>&"')."</pre></font>\n");
1.346     albertel 1511: 	#&Apache::lonnet::logthis($_[0]);
1.298     albertel 1512:     }
1.22      albertel 1513: }
1.49      albertel 1514: 
1.348     albertel 1515: sub show_error_warn_msg {
1.372     albertel 1516:     if ($env{'request.filename'} eq '/home/httpd/html/res/lib/templates/simpleproblem.problem' &&
                   1517: 	&Apache::lonnet::allowed('mdc',$env{'request.course.id'})) {
1.351     albertel 1518: 	return 1;
                   1519:     }
1.348     albertel 1520:     return (($Apache::lonxml::debug eq 1) ||
1.372     albertel 1521: 	    ($env{'request.state'} eq 'construct') ||
1.348     albertel 1522: 	    ($Apache::lonhomework::browse eq 'F'
                   1523: 	     &&
1.372     albertel 1524: 	     $env{'form.show_errors'} eq 'on'));
1.348     albertel 1525: }
                   1526: 
1.22      albertel 1527: sub error {
1.336     albertel 1528:     $errorcount++;
1.348     albertel 1529:     if ( &show_error_warn_msg() ) {
1.336     albertel 1530: 	# If printing in construction space, put the error inside <pre></pre>
                   1531: 	push(@Apache::lonxml::error_messages,
                   1532: 	     $Apache::lonxml::warnings_error_header.
                   1533: 	     "<b>ERROR:</b>".join("<br />\n",@_)."<br />\n");
                   1534: 	$Apache::lonxml::warnings_error_header='';
                   1535:     } else {
                   1536: 	my $errormsg;
                   1537: 	my ($symb)=&Apache::lonnet::symbread();
                   1538: 	if ( !$symb ) {
                   1539: 	    #public or browsers
                   1540: 	    $errormsg=&mt("An error occured while processing this resource. The author has been notified.");
1.403     albertel 1541: 	}
1.413     albertel 1542: 	my $host=$Apache::lonnet::perlvar{'lonHostID'};
                   1543: 	my $msg = join('<br />',(@_,"The occured on host <tt>$host</tt>"));
1.336     albertel 1544: 	#notify author
1.403     albertel 1545: 	&Apache::lonmsg::author_res_msg($env{'request.filename'},$msg);
1.336     albertel 1546: 	#notify course
1.372     albertel 1547: 	if ( $symb && $env{'request.course.id'} ) {
1.380     www      1548: 	    my $cnum=$env{'course.'.$env{'request.course.id'}.'.num'};
                   1549: 	    my $cdom=$env{'course.'.$env{'request.course.id'}.'.domain'};
1.336     albertel 1550: 	    my (undef,%users)=&Apache::lonfeedback::decide_receiver(undef,0,1,1,1);
1.372     albertel 1551: 	    my $declutter=&Apache::lonnet::declutter($env{'request.filename'});
1.336     albertel 1552: 	    my @userlist;
                   1553: 	    foreach (keys %users) {
                   1554: 		my ($user,$domain) = split(/:/, $_);
                   1555: 		push(@userlist,"$user\@$domain");
1.380     www      1556: 		my $key=$declutter.'_'.$user.'_'.$domain;
                   1557: 		my %lastnotified=&Apache::lonnet::get('nohist_xmlerrornotifications',
                   1558: 						      [$key],
                   1559: 						      $cdom,$cnum);
                   1560: 		my $now=time;
                   1561: 		if ($now-$lastnotified{$key}>86400) {
                   1562: 		    &Apache::lonmsg::user_normal_msg($user,$domain,
1.403     albertel 1563: 						 "Error [$declutter]",$msg);
1.380     www      1564: 		    &Apache::lonnet::put('nohist_xmlerrornotifications',
                   1565: 					 {$key => $now},
                   1566: 					 $cdom,$cnum);		
                   1567: 		}
1.336     albertel 1568: 	    }
1.372     albertel 1569: 	    if ($env{'request.role.adv'}) {
1.336     albertel 1570: 		$errormsg=&mt("An error occured while processing this resource. The course personnel ([_1]) and the author have been notified.",join(', ',@userlist));
                   1571: 	    } else {
                   1572: 		$errormsg=&mt("An error occured while processing this resource. The instructor has been notified.");
                   1573: 	    }
                   1574: 	}
                   1575: 	push(@Apache::lonxml::error_messages,"<b>$errormsg</b> <br />");
1.52      albertel 1576:     }
1.22      albertel 1577: }
1.49      albertel 1578: 
1.22      albertel 1579: sub warning {
1.295     albertel 1580:     $warningcount++;
1.261     albertel 1581:   
1.372     albertel 1582:     if ($env{'form.grade_target'} ne 'tex') {
1.348     albertel 1583: 	if ( &show_error_warn_msg() ) {
1.309     albertel 1584: 	    push(@Apache::lonxml::warning_messages,
                   1585: 		 $Apache::lonxml::warnings_error_header.
                   1586: 		 "<b>W</b>ARNING<b>:</b>".join('<br />',@_)."<br />\n");
1.295     albertel 1587: 	    $Apache::lonxml::warnings_error_header='';
                   1588: 	}
                   1589:     }
1.309     albertel 1590: }
                   1591: 
                   1592: sub info {
1.372     albertel 1593:     if ($env{'form.grade_target'} ne 'tex' 
                   1594: 	&& $env{'request.state'} eq 'construct') {
1.309     albertel 1595: 	push(@Apache::lonxml::info_messages,join('<br />',@_)."<br />\n");
                   1596:     }
                   1597: }
                   1598: 
                   1599: sub message_location {
                   1600:     return '__LONCAPA_INTERNAL_MESSAGE_LOCATION__';
                   1601: }
                   1602: 
                   1603: sub add_messages {
                   1604:     my ($msg)=@_;
                   1605:     my $result=join(' ',
                   1606: 		    @Apache::lonxml::info_messages,
                   1607: 		    @Apache::lonxml::error_messages,
                   1608: 		    @Apache::lonxml::warning_messages);
                   1609:     undef(@Apache::lonxml::info_messages);
                   1610:     undef(@Apache::lonxml::error_messages);
                   1611:     undef(@Apache::lonxml::warning_messages);
                   1612:     $$msg=~s/__LONCAPA_INTERNAL_MESSAGE_LOCATION__/$result/;
                   1613:     $$msg=~s/__LONCAPA_INTERNAL_MESSAGE_LOCATION__//g;
1.83      albertel 1614: }
                   1615: 
                   1616: sub get_param {
1.213     albertel 1617:     my ($param,$parstack,$safeeval,$context,$case_insensitive) = @_;
                   1618:     if ( ! $context ) { $context = -1; }
                   1619:     my $args ='';
                   1620:     if ( $#$parstack > (-2-$context) ) { $args=$$parstack[$context]; }
1.297     sakharuk 1621:     if ( ! $Apache::lonxml::usestyle ) {
                   1622: 	$args=$Apache::lonxml::style_values.$args;
                   1623:     }
1.213     albertel 1624:     if ( ! $args ) { return undef; }
                   1625:     if ( $case_insensitive ) {
                   1626: 	if ($args =~ s/(my \$)(\Q$param\E)(=\")/$1.lc($2).$3/ei) {
                   1627: 	    return &Apache::run::run("{$args;".'return $'.$param.'}',
                   1628:                                      $safeeval); #'
                   1629: 	} else {
                   1630: 	    return undef;
                   1631: 	}
                   1632:     } else {
                   1633: 	if ( $args =~ /my \$\Q$param\E=\"/ ) {
                   1634: 	    return &Apache::run::run("{$args;".'return $'.$param.'}',
                   1635:                                      $safeeval); #'
                   1636: 	} else {
                   1637: 	    return undef;
                   1638: 	}
                   1639:     }
1.22      albertel 1640: }
                   1641: 
1.132     albertel 1642: sub get_param_var {
1.213     albertel 1643:   my ($param,$parstack,$safeeval,$context,$case_insensitive) = @_;
1.132     albertel 1644:   if ( ! $context ) { $context = -1; }
                   1645:   my $args ='';
                   1646:   if ( $#$parstack > (-2-$context) ) { $args=$$parstack[$context]; }
1.297     sakharuk 1647:   if ( ! $Apache::lonxml::usestyle ) {
                   1648:       $args=$Apache::lonxml::style_values.$args;
                   1649:   }
1.230     albertel 1650:   &Apache::lonxml::debug("Args are $args param is $param");
1.213     albertel 1651:   if ($case_insensitive) {
                   1652:       if (! ($args=~s/(my \$)(\Q$param\E)(=\")/$1.lc($2).$3/ei)) {
                   1653: 	  return undef;
                   1654:       }
                   1655:   } elsif ( $args !~ /my \$\Q$param\E=\"/ ) { return undef; }
1.132     albertel 1656:   my $value=&Apache::run::run("{$args;".'return $'.$param.'}',$safeeval); #'
1.230     albertel 1657:   &Apache::lonxml::debug("first run is $value");
1.341     albertel 1658:   if ($value =~ /^[\$\@\%][a-zA-Z_]\w*$/) {
1.230     albertel 1659:       &Apache::lonxml::debug("doing second");
                   1660:       my @result=&Apache::run::run("return $value",$safeeval,1);
                   1661:       if (!defined($result[0])) {
                   1662: 	  return $value
                   1663:       } else {
                   1664: 	  if (wantarray) { return @result; } else { return $result[0]; }
                   1665:       }
1.132     albertel 1666:   } else {
                   1667:     return $value;
                   1668:   }
                   1669: }
                   1670: 
1.74      albertel 1671: sub register_insert {
1.75      albertel 1672:   my @data = split /\n/, &Apache::lonnet::getfile('/home/httpd/lonTabs/insertlist.tab');
1.74      albertel 1673:   my $i;
1.76      albertel 1674:   my $tagnum=0;
1.74      albertel 1675:   my @order;
                   1676:   for ($i=0;$i < $#data; $i++) {
                   1677:     my $line = $data[$i];
                   1678:     if ( $line =~ /^\#/ || $line =~ /^\s*\n/) { next; }
                   1679:     if ( $line =~ /TABLE/ ) { last; }
1.268     bowersj2 1680:     my ($tag,$descrip,$color,$function,$show,$helpfile,$helpdesc) = split(/,/, $line);
1.135     albertel 1681:     if ($tag) {
                   1682:       $insertlist{"$tagnum.tag"} = $tag;
                   1683:       $insertlist{"$tagnum.description"} = $descrip;
                   1684:       $insertlist{"$tagnum.color"} = $color;
                   1685:       $insertlist{"$tagnum.function"} = $function;
                   1686:       if (!defined($show)) { $show='yes'; }
                   1687:       $insertlist{"$tagnum.show"}= $show;
1.268     bowersj2 1688:       $insertlist{"$tagnum.helpfile"} = $helpfile;
                   1689:       $insertlist{"$tagnum.helpdesc"} = $helpdesc;
1.135     albertel 1690:       $insertlist{"$tag.num"}=$tagnum;
                   1691:       $tagnum++;
                   1692:     }
1.74      albertel 1693:   }
1.76      albertel 1694:   $i++; #skipping TABLE line
                   1695:   $tagnum = 0;
1.74      albertel 1696:   for (;$i < $#data;$i++) {
                   1697:     my $line = $data[$i];
1.76      albertel 1698:     my ($mnemonic,@which) = split(/ +/,$line);
                   1699:     my $tag = $insertlist{"$tagnum.tag"};
1.144     matthew  1700:     for (my $j=0;$j <=$#which;$j++) {
1.74      albertel 1701:       if ( $which[$j] eq 'Y' ) {
1.76      albertel 1702: 	if ($insertlist{"$j.show"} ne 'no') {
                   1703: 	  push(@{ $insertlist{"$tag.which"} },$j);
                   1704: 	}
1.74      albertel 1705:       }
                   1706:     }
1.76      albertel 1707:     $tagnum++;
1.74      albertel 1708:   }
                   1709: }
1.98      albertel 1710: 
                   1711: sub description {
                   1712:   my ($token)=@_;
1.138     albertel 1713:   my $tagnum;
                   1714:   my $tag=$token->[1];
                   1715:   foreach my $namespace (reverse @Apache::lonxml::namespace) {
                   1716:     my $testtag=$namespace.'::'.$tag;
                   1717:     $tagnum=$insertlist{"$testtag.num"};
                   1718:     if (defined($tagnum)) { last; }
                   1719:   }
                   1720:   if (!defined ($tagnum)) { $tagnum=$Apache::lonxml::insertlist{"$tag.num"}; }
                   1721:   return $insertlist{$tagnum.'.description'};
1.268     bowersj2 1722: }
                   1723: 
                   1724: # Returns a list containing the help file, and the description
                   1725: sub helpinfo {
                   1726:   my ($token)=@_;
                   1727:   my $tagnum;
                   1728:   my $tag=$token->[1];
                   1729:   foreach my $namespace (reverse @Apache::lonxml::namespace) {
                   1730:     my $testtag=$namespace.'::'.$tag;
                   1731:     $tagnum=$insertlist{"$testtag.num"};
                   1732:     if (defined($tagnum)) { last; }
                   1733:   }
                   1734:   if (!defined ($tagnum)) { $tagnum=$Apache::lonxml::insertlist{"$tag.num"}; }
                   1735:   return ($insertlist{$tagnum.'.helpfile'}, $insertlist{$tagnum.'.helpdesc'});
1.98      albertel 1736: }
1.123     albertel 1737: 
                   1738: # ----------------------------------------------------------------- whichuser
                   1739: # returns a list of $symb, $courseid, $domain, $name that is correct for
                   1740: # calls to lonnet functions for this setup.
                   1741: # - looks for form.grade_ parameters
                   1742: sub whichuser {
1.262     matthew  1743:   my ($passedsymb)=@_;
1.245     albertel 1744:   my ($symb,$courseid,$domain,$name,$publicuser);
1.372     albertel 1745:   if (defined($env{'form.grade_symb'})) {
1.350     albertel 1746:       my ($tmp_courseid)=
                   1747: 	  &Apache::loncommon::get_env_multiple('form.grade_courseid');
                   1748:       my $allowed=&Apache::lonnet::allowed('vgr',$tmp_courseid);
                   1749:       if (!$allowed && 
1.372     albertel 1750: 	  exists($env{'request.course.sec'}) && 
                   1751: 	  $env{'request.course.sec'} !~ /^\s*$/) {
1.350     albertel 1752: 	  $allowed=&Apache::lonnet::allowed('vgr',$tmp_courseid.
1.372     albertel 1753: 					    '/'.$env{'request.course.sec'});
1.350     albertel 1754:       }
                   1755:       if ($allowed) {
                   1756: 	  ($symb)=&Apache::loncommon::get_env_multiple('form.grade_symb');
                   1757: 	  $courseid=$tmp_courseid;
                   1758: 	  ($domain)=&Apache::loncommon::get_env_multiple('form.grade_domain');
                   1759: 	  ($name)=&Apache::loncommon::get_env_multiple('form.grade_username');
                   1760: 	  return ($symb,$courseid,$domain,$name,$publicuser);
                   1761:       }
                   1762:   }
                   1763:   if (!$passedsymb) {
                   1764:       $symb=&Apache::lonnet::symbread();
1.134     albertel 1765:   } else {
1.350     albertel 1766:       $symb=$passedsymb;
                   1767:   }
1.372     albertel 1768:   $courseid=$env{'request.course.id'};
                   1769:   $domain=$env{'user.domain'};
                   1770:   $name=$env{'user.name'};
1.350     albertel 1771:   if ($name eq 'public' && $domain eq 'public') {
1.372     albertel 1772:       if (!defined($env{'form.username'})) {
                   1773: 	  $env{'form.username'}.=time.rand(10000000);
1.244     albertel 1774:       }
1.372     albertel 1775:       $name.=$env{'form.username'};
1.123     albertel 1776:   }
1.245     albertel 1777:   return ($symb,$courseid,$domain,$name,$publicuser);
1.123     albertel 1778: }
                   1779: 
1.1       sakharuk 1780: 1;
                   1781: __END__
1.68      www      1782: 
                   1783: 

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