Annotation of loncom/xml/lonxml.pm, revision 1.437

1.2       sakharuk    1: # The LearningOnline Network with CAPA
1.3       sakharuk    2: # XML Parser Module 
1.2       sakharuk    3: #
1.437   ! albertel    4: # $Id: lonxml.pm,v 1.436 2007/01/08 18:44:01 albertel 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();
1.431     www        91: use Apache::lonmaxima();
1.280     www        92: use Apache::lonlocal;
1.79      www        93: 
1.72      albertel   94: #==================================================   Main subroutine: xmlparse  
                     95: #debugging control, to turn on debugging modify the correct handler
                     96: $Apache::lonxml::debug=0;
1.206     albertel   97: 
                     98: # keeps count of the number of warnings and errors generated in a parse
                     99: $warningcount=0;
                    100: $errorcount=0;
1.72      albertel  101: 
                    102: #path to the directory containing the file currently being processed
                    103: @pwd=();
                    104: 
                    105: #these two are used for capturing a subset of the output for later processing,
                    106: #don't touch them directly use &startredirection and &endredirection
                    107: @outputstack = ();
                    108: $redirection = 0;
                    109: 
                    110: #controls wheter the <import> tag actually does
                    111: $import = 1;
                    112: @extlinks=();
                    113: 
                    114: # meta mode is a bit weird only some output is to be turned off
                    115: #<output> tag turns metamode off (defined in londefdef.pm)
                    116: $metamode = 0;
                    117: 
                    118: # turns on and of run::evaluate actually derefencing var refs
                    119: $evaluate = 1;
1.7       albertel  120: 
1.74      albertel  121: # data structure for eidt mode, determines what tags can go into what other tags
                    122: %insertlist=();
1.68      www       123: 
1.99      albertel  124: # stores the list of active tag namespaces
1.76      albertel  125: @namespace=();
                    126: 
1.172     albertel  127: # a pointer the the Apache request object
                    128: $Apache::lonxml::request='';
                    129: 
1.216     sakharuk  130: # a problem number counter, and check on ether it is used
1.237     sakharuk  131: $Apache::lonxml::counter=1;
1.204     albertel  132: $Apache::lonxml::counter_changed=0;
                    133: 
1.212     albertel  134: #internal check on whether to look at style defs
                    135: $Apache::lonxml::usestyle=1;
1.260     albertel  136: 
                    137: #locations used to store the parameter string for style substitutions
                    138: $Apache::lonxml::style_values='';
                    139: $Apache::lonxml::style_end_values='';
1.212     albertel  140: 
1.281     albertel  141: #array of ssi calls that need to occur after we are done parsing
                    142: @Apache::lonxml::ssi_info=();
                    143: 
1.282     albertel  144: #should we do the postag variable interpolation
                    145: $Apache::lonxml::post_evaluate=1;
                    146: 
1.295     albertel  147: #a header message to emit in the case of any generated warning or errors
                    148: $Apache::lonxml::warnings_error_header='';
                    149: 
1.396     foxr      150: #  Control whether or not LaTeX symbols should be substituted for their
                    151: #  \ style equivalents...this may be turned off e.g. in an verbatim
                    152: #  environment.
                    153: 
                    154: $Apache::lonxml::substitute_LaTeX_symbols = 1; # Starts out on.
                    155: 
                    156: sub enable_LaTeX_substitutions {
                    157:     $Apache::lonxml::substitute_LaTeX_symbols = 1;
                    158: }
                    159: sub disable_LaTeX_substitutions {
                    160:     $Apache::lonxml::substitute_LaTeX_symbols = 0;
                    161: }
                    162: 
1.68      www       163: sub xmlend {
1.335     sakharuk  164:     my ($target,$parser)=@_;
1.278     www       165:     my $mode='xml';
                    166:     my $status='OPEN';
1.368     albertel  167:     if ($Apache::lonhomework::parsing_a_problem ||
                    168: 	$Apache::lonhomework::parsing_a_task ) {
1.278     www       169: 	$mode='problem';
                    170: 	$status=$Apache::inputtags::status[-1]; 
                    171:     }
1.362     matthew   172:     my $discussion;
1.379     albertel  173:     &Apache::loncommon::get_unprocessed_cgi($ENV{'QUERY_STRING'},
                    174: 					   ['LONCAPA_INTERNAL_no_discussion']);
1.372     albertel  175:     if (! exists($env{'form.LONCAPA_INTERNAL_no_discussion'}) ||
                    176:         $env{'form.LONCAPA_INTERNAL_no_discussion'} ne 'true') {
1.362     matthew   177:         $discussion=&Apache::lonfeedback::list_discussion($mode,$status);
                    178:     }
1.334     sakharuk  179:     if ($target eq 'tex') {
1.335     sakharuk  180: 	$discussion.='<tex>\keephidden{ENDOFPROBLEM}\vskip 0.5mm\noindent\makebox[\textwidth/$number_of_columns][b]{\hrulefill}\end{document}</tex>';
1.334     sakharuk  181: 	&Apache::lonxml::newparser($parser,\$discussion,'');
                    182: 	return '';
                    183:     }
1.405     albertel  184: 
1.407     albertel  185:     return $discussion;
1.119     www       186: }
                    187: 
                    188: sub tokeninputfield {
1.120     www       189:     my $defhost=$Apache::lonnet::perlvar{'lonHostID'};
                    190:     $defhost=~tr/a-z/A-Z/;
1.119     www       191:     return (<<ENDINPUTFIELD)
1.226     albertel  192: <script type="text/javascript">
1.120     www       193:     function updatetoken() {
                    194: 	var comp=new Array;
                    195:         var barcode=unescape(document.tokeninput.barcode.value);
                    196:         comp=barcode.split('*');
                    197:         if (typeof(comp[0])!="undefined") {
                    198: 	    document.tokeninput.codeone.value=comp[0];
                    199: 	}
                    200:         if (typeof(comp[1])!="undefined") {
                    201: 	    document.tokeninput.codetwo.value=comp[1];
                    202: 	}
                    203:         if (typeof(comp[2])!="undefined") {
                    204:             comp[2]=comp[2].toUpperCase();
                    205: 	    document.tokeninput.codethree.value=comp[2];
                    206: 	}
                    207:         document.tokeninput.barcode.value='';
                    208:     }  
                    209: </script>
                    210: <form method="post" name="tokeninput">
1.119     www       211: <table border="2" bgcolor="#FFFFBB">
                    212: <tr><th>DocID Checkin</th></tr>
                    213: <tr><td>
                    214: <table>
                    215: <tr>
                    216: <td>Scan in Barcode</td>
1.120     www       217: <td><input type="text" size="22" name="barcode" 
                    218: onChange="updatetoken()"/></td>
1.119     www       219: </tr>
                    220: <tr><td><i>or</i> Type in DocID</td>
                    221: <td>
                    222: <input type="text" size="5" name="codeone" />
1.120     www       223: <b><font size="+2">*</font></b>
1.119     www       224: <input type="text" size="5" name="codetwo" />
1.120     www       225: <b><font size="+2">*</font></b>
                    226: <input type="text" size="10" name="codethree" value="$defhost" 
                    227: onChange="this.value=this.value.toUpperCase()" />
1.119     www       228: </td></tr>
                    229: </table>
                    230: </td></tr>
                    231: <tr><td><input type="submit" value="Check in DocID" /></td></tr>
                    232: </table>
                    233: </form>
                    234: ENDINPUTFIELD
1.112     www       235: }
                    236: 
1.116     www       237: sub maketoken {
1.118     www       238:     my ($symb,$tuname,$tudom,$tcrsid)=@_;
1.112     www       239:     unless ($symb) {
                    240: 	$symb=&Apache::lonnet::symbread();
                    241:     }
                    242:     unless ($tuname) {
1.372     albertel  243: 	$tuname=$env{'user.name'};
                    244:         $tudom=$env{'user.domain'};
                    245:         $tcrsid=$env{'request.course.id'};
1.112     www       246:     }
1.116     www       247: 
1.118     www       248:     return &Apache::lonnet::checkout($symb,$tuname,$tudom,$tcrsid);
                    249: }
                    250: 
                    251: sub printtokenheader {
1.133     albertel  252:     my ($target,$token,$tsymb,$tcrsid,$tudom,$tuname)=@_;
1.116     www       253:     unless ($token) { return ''; }
1.118     www       254: 
1.423     albertel  255:     my ($symb,$courseid,$domain,$name) = &Apache::lonnet::whichuser();
1.133     albertel  256:     unless ($tsymb) {
                    257: 	$tsymb=$symb;
1.118     www       258:     }
                    259:     unless ($tuname) {
1.133     albertel  260: 	$tuname=$name;
                    261:         $tudom=$domain;
                    262:         $tcrsid=$courseid;
1.118     www       263:     }
1.114     www       264: 
1.390     albertel  265:     my $plainname=&Apache::loncommon::plainname($tuname,$tudom);
1.114     www       266: 
1.112     www       267:     if ($target eq 'web') {
1.145     www       268:         my %idhash=&Apache::lonnet::idrget($tudom,($tuname));
1.115     www       269: 	return 
1.221     albertel  270:  '<img align="right" src="/cgi-bin/barcode.png?encode='.$token.'" />'.
1.284     www       271:                &mt('Checked out for').' '.$plainname.
                    272:                '<br />'.&mt('User').': '.$tuname.' at '.$tudom.
                    273: 	       '<br />'.&mt('ID').': '.$idhash{$tuname}.
                    274: 	       '<br />'.&mt('CourseID').': '.$tcrsid.
1.372     albertel  275: 	       '<br />'.&mt('Course').': '.$env{'course.'.$tcrsid.'.description'}.
1.284     www       276:                '<br />'.&mt('DocID').': '.$token.
                    277:                '<br />'.&mt('Time').': '.&Apache::lonlocal::locallocaltime().'<hr />';
1.112     www       278:     } else {
1.121     albertel  279:         return $token;
1.112     www       280:     }
1.68      www       281: }
                    282: 
1.48      albertel  283: sub printalltags {
                    284:   my $temp;
                    285:   foreach $temp (sort keys %Apache::lonxml::alltags) {
1.141     albertel  286:     &Apache::lonxml::debug("$temp -- ".
                    287: 		  join(',',@{ $Apache::lonxml::alltags{$temp} }));
1.48      albertel  288:   }
                    289: }
1.31      sakharuk  290: 
1.3       sakharuk  291: sub xmlparse {
1.172     albertel  292:  my ($request,$target,$content_file_string,$safeinit,%style_for_target) = @_;
1.96      albertel  293: 
1.172     albertel  294:  &setup_globals($request,$target);
1.232     albertel  295:  &Apache::inputtags::initialize_inputtags();
1.370     albertel  296:  &Apache::bridgetask::initialize_bridgetask();
1.232     albertel  297:  &Apache::outputtags::initialize_outputtags();
                    298:  &Apache::edit::initialize_edit();
1.287     albertel  299:  &Apache::londefdef::initialize_londefdef();
1.244     albertel  300: 
1.178     www       301: #
                    302: # do we have a course style file?
                    303: #
                    304: 
1.372     albertel  305:  if ($env{'request.course.id'} && $env{'request.state'} ne 'construct') {
1.178     www       306:      my $bodytext=
1.372     albertel  307: 	 $env{'course.'.$env{'request.course.id'}.'.default_xml_style'};
1.178     www       308:      if ($bodytext) {
1.337     albertel  309: 	 foreach my $file (split(',',$bodytext)) {
                    310: 	     my $location=&Apache::lonnet::filelocation('',$file);
                    311: 	     my $styletext=&Apache::lonnet::getfile($location);
                    312: 	     if ($styletext ne '-1') {
                    313: 		 %style_for_target = (%style_for_target,
                    314: 				      &Apache::style::styleparser($target,$styletext));
                    315: 	     }
                    316: 	 }
                    317:      }
1.372     albertel  318:  } elsif ($env{'construct.style'} && ($env{'request.state'} eq 'construct')) {
                    319:      my $location=&Apache::lonnet::filelocation('',$env{'construct.style'});
1.291     sakharuk  320:      my $styletext=&Apache::lonnet::getfile($location);
                    321:        if ($styletext ne '-1') {
                    322:           %style_for_target = (%style_for_target,
                    323:                           &Apache::style::styleparser($target,$styletext));
                    324:       }
1.178     www       325:  }
1.255     sakharuk  326: #&printalltags();
1.16      albertel  327:  my @pars = ();
1.372     albertel  328:  my $pwd=$env{'request.filename'};
1.23      albertel  329:  $pwd =~ s:/[^/]*$::;
                    330:  &newparser(\@pars,\$content_file_string,$pwd);
1.24      sakharuk  331: 
1.3       sakharuk  332:  my $safeeval = new Safe;
1.40      albertel  333:  my $safehole = new Safe::Hole;
1.82      ng        334:  &init_safespace($target,$safeeval,$safehole,$safeinit);
1.3       sakharuk  335: #-------------------- Redefinition of the target in the case of compound target
                    336: 
                    337:  ($target, my @tenta) = split('&&',$target);
                    338: 
1.150     albertel  339:  my @stack = ();
1.3       sakharuk  340:  my @parstack = ();
1.358     albertel  341:  &initdepth();
                    342:  &init_alarm();
1.101     albertel  343:  my $finaloutput = &inner_xmlparse($target,\@stack,\@parstack,\@pars,
1.394     albertel  344: 				   $safeeval,\%style_for_target,1);
1.255     sakharuk  345: 
1.425     albertel  346:  if (@stack) {
                    347:      &warning("At end of file some tags were still left unclosed, ".
                    348: 	      '<tt>&lt;'.join('&gt;</tt>, <tt>&lt;',reverse(@stack)).
                    349: 	      '&gt;</tt>');
                    350:  }
1.372     albertel  351:  if ($env{'request.uri'}) {
                    352:     &writeallows($env{'request.uri'});
1.125     www       353:  }
1.281     albertel  354:  &do_registered_ssi();
1.204     albertel  355:  if ($Apache::lonxml::counter_changed) { &store_counter() }
1.393     albertel  356: 
                    357:  &clean_safespace($safeeval);
                    358: 
1.372     albertel  359:  if ($env{'form.return_only_error_and_warning_counts'}) {
1.361     www       360:      return "$errorcount:$warningcount";
                    361:  }
1.3       sakharuk  362:  return $finaloutput;
1.106     www       363: }
                    364: 
1.191     albertel  365: sub latex_special_symbols {
1.272     albertel  366:     my ($string,$where)=@_;
1.396     foxr      367:     #
                    368:     #  If e.g. in verbatim mode, then don't substitute.
                    369:     #  but return original string.
                    370:     #
                    371:     if (!($Apache::lonxml::substitute_LaTeX_symbols)) {
                    372: 	return $string;
                    373:     }
1.235     sakharuk  374:     if ($where eq 'header') {
1.414     foxr      375: 	$string =~ s/\\/\$\\backslash\$/g; # \  -> $\backslash$ per LaTex line by line pg  10.
1.311     albertel  376: 	$string =~ s/(\$|%|\{|\})/\\$1/g;
                    377: 	$string=&Apache::lonprintout::character_chart($string);
                    378: 	# any & or # leftover should be safe to just escape
                    379:         $string=~s/([^\\])\&/$1\\\&/g;
                    380:         $string=~s/([^\\])\#/$1\\\#/g;
1.415     foxr      381: 	$string =~ s/_/\\_/g;              # _ -> \_
                    382: 	$string =~ s/\^/\\\^{}/g;          # ^ -> \^{} 
1.229     sakharuk  383:     } else {
1.312     albertel  384: 	$string=~s/\\/\\ensuremath{\\backslash}/g;
1.367     albertel  385: 	$string=~s/\\\%|\%/\\\%/g;
                    386: 	$string=~s/\\{|{/\\{/g;
                    387: 	$string=~s/\\}|}/\\}/g;
1.378     albertel  388: 	$string=~s/\\ensuremath\\{\\backslash\\}/\\ensuremath{\\backslash}/g;
1.367     albertel  389: 	$string=~s/\\\$|\$/\\\$/g;
                    390: 	$string=~s/\\\_|\_/\\\_/g;
1.313     albertel  391:         $string=~s/([^\\]|^)(\~|\^)/$1\\$2\\strut /g;
1.310     sakharuk  392: 	$string=~s/(>|<)/\\ensuremath\{$1\}/g; #more or less
1.311     albertel  393: 	$string=&Apache::lonprintout::character_chart($string);
                    394: 	# any & or # leftover should be safe to just escape
1.367     albertel  395: 	$string=~s/\\\&|\&/\\\&/g;
                    396: 	$string=~s/\\\#|\#/\\\#/g;
1.332     sakharuk  397:         $string=~s/\|/\$\\mid\$/g;
1.310     sakharuk  398: #single { or } How to escape?
1.229     sakharuk  399:     }
1.272     albertel  400:     return $string;
1.188     sakharuk  401: }
                    402: 
1.101     albertel  403: sub inner_xmlparse {
1.394     albertel  404:   my ($target,$stack,$parstack,$pars,$safeeval,$style_for_target,$start)=@_;
1.101     albertel  405:   my $finaloutput = '';
                    406:   my $result;
                    407:   my $token;
1.258     albertel  408:   my $dontpop=0;
1.389     albertel  409:   my $startredirection = $Apache::lonxml::redirection;
1.101     albertel  410:   while ( $#$pars > -1 ) {
                    411:     while ($token = $$pars['-1']->get_token) {
1.261     albertel  412:       if (($token->[0] eq 'T') || ($token->[0] eq 'C') ) {
1.101     albertel  413: 	if ($metamode<1) {
1.190     albertel  414: 	    my $text=$token->[1];
1.193     albertel  415: 	    if ($token->[0] eq 'C' && $target eq 'tex') {
1.239     sakharuk  416: 		$text = '';
                    417: #		$text = '%'.$text."\n";
1.182     sakharuk  418: 	    }
1.190     albertel  419: 	    $result.=$text;
1.101     albertel  420: 	}
1.261     albertel  421:       } elsif (($token->[0] eq 'D')) {
                    422: 	if ($metamode<1 && $target eq 'web') {
                    423: 	    my $text=$token->[1];
                    424: 	    $result.=$text;
                    425: 	}
1.101     albertel  426:       } elsif ($token->[0] eq 'PI') {
1.261     albertel  427: 	if ($metamode<1 && $target eq 'web') {
1.101     albertel  428: 	  $result=$token->[2];
                    429: 	}
                    430:       } elsif ($token->[0] eq 'S') {
1.140     albertel  431: 	# add tag to stack
1.101     albertel  432: 	push (@$stack,$token->[1]);
                    433: 	# add parameters list to another stack
                    434: 	push (@$parstack,&parstring($token));
1.140     albertel  435: 	&increasedepth($token);
1.212     albertel  436: 	if ($Apache::lonxml::usestyle &&
                    437: 	    exists($$style_for_target{$token->[1]})) {
                    438: 	    $Apache::lonxml::usestyle=0;
                    439: 	    my $string=$$style_for_target{$token->[1]}.
                    440: 	      '<LONCAPA_INTERNAL_TURN_STYLE_ON />';
                    441: 	    &Apache::lonxml::newparser($pars,\$string);
1.257     albertel  442: 	    $Apache::lonxml::style_values=$$parstack[-1];
1.259     albertel  443: 	    $Apache::lonxml::style_end_values=$$parstack[-1];
1.101     albertel  444: 	} else {
                    445: 	  $result = &callsub("start_$token->[1]", $target, $token, $stack,
                    446: 			     $parstack, $pars, $safeeval, $style_for_target);
1.140     albertel  447: 	}
1.101     albertel  448:       } elsif ($token->[0] eq 'E') {
1.212     albertel  449: 	if ($Apache::lonxml::usestyle &&
                    450: 	    exists($$style_for_target{'/'."$token->[1]"})) {
                    451: 	    $Apache::lonxml::usestyle=0;
                    452: 	    my $string=$$style_for_target{'/'.$token->[1]}.
1.258     albertel  453: 	      '<LONCAPA_INTERNAL_TURN_STYLE_ON end="'.$token->[1].'" />';
1.212     albertel  454: 	    &Apache::lonxml::newparser($pars,\$string);
1.259     albertel  455: 	    $Apache::lonxml::style_values=$Apache::lonxml::style_end_values;
                    456: 	    $Apache::lonxml::style_end_values='';
1.258     albertel  457: 	    $dontpop=1;
1.101     albertel  458: 	} else {
1.258     albertel  459: 	    #clear out any tags that didn't end
                    460: 	    while ($token->[1] ne $$stack['-1'] && ($#$stack > -1)) {
                    461: 		my $lasttag=$$stack[-1];
1.317     albertel  462: 		if ($token->[1] =~ /^\Q$lasttag\E$/i) {
1.258     albertel  463: 		    &Apache::lonxml::warning('Using tag &lt;/'.$token->[1].'&gt; on line '.$token->[3].' as end tag to &lt;'.$$stack[-1].'&gt;');
                    464: 		    last;
                    465: 		} else {
                    466: 		    &Apache::lonxml::warning('Found tag &lt;/'.$token->[1].'&gt; on line '.$token->[3].' when looking for &lt;/'.$$stack[-1].'&gt; in file');
                    467: 		    &end_tag($stack,$parstack,$token);
                    468: 		}
                    469: 	    }
                    470: 	    $result = &callsub("end_$token->[1]", $target, $token, $stack,
                    471: 			       $parstack, $pars,$safeeval, $style_for_target);
1.101     albertel  472: 	}
                    473:       } else {
                    474: 	&Apache::lonxml::error("Unknown token event :$token->[0]:$token->[1]:");
                    475:       }
                    476:       #evaluate variable refs in result
1.282     albertel  477:       if ($Apache::lonxml::post_evaluate &&$result ne "") {
1.257     albertel  478: 	  my $extras;
                    479: 	  if (!$Apache::lonxml::usestyle) {
                    480: 	      $extras=$Apache::lonxml::style_values;
                    481: 	  }
1.101     albertel  482: 	if ( $#$parstack > -1 ) {
1.257     albertel  483: 	  $result=&Apache::run::evaluate($result,$safeeval,$extras.$$parstack[-1]);
1.101     albertel  484: 	} else {
1.257     albertel  485: 	  $result= &Apache::run::evaluate($result,$safeeval,$extras);
1.101     albertel  486: 	}
1.163     albertel  487:       }
1.282     albertel  488:       $Apache::lonxml::post_evaluate=1;
                    489: 
1.190     albertel  490:       if (($token->[0] eq 'T') || ($token->[0] eq 'C') || ($token->[0] eq 'D') ) {
1.249     albertel  491: 	  #Style file definitions should be correct
1.250     albertel  492: 	  if ($target eq 'tex' && ($Apache::lonxml::usestyle)) {
1.311     albertel  493: 	      $result=&latex_special_symbols($result);
1.249     albertel  494: 	  }
1.190     albertel  495:       }
                    496: 
1.169     albertel  497:       if ($Apache::lonxml::redirection) {
                    498: 	$Apache::lonxml::outputstack['-1'] .= $result;
                    499:       } else {
                    500: 	$finaloutput.=$result;
                    501:       }
                    502:       $result = '';
                    503: 
1.258     albertel  504:       if ($token->[0] eq 'E' && !$dontpop) {
1.101     albertel  505: 	&end_tag($stack,$parstack,$token);
                    506:       }
1.258     albertel  507:       $dontpop=0;
1.224     albertel  508:     }	
1.212     albertel  509:     if ($#$pars > -1) {
                    510: 	pop @$pars;
                    511: 	pop @Apache::lonxml::pwd;
                    512:     }
1.101     albertel  513:   }
                    514: 
                    515:   # if ($target eq 'meta') {
                    516:   #   $finaloutput.=&endredirection;
                    517:   # }
                    518: 
1.394     albertel  519:   if ( $start && $target eq 'grade') { &endredirection(); }
1.389     albertel  520:   if ( $Apache::lonxml::redirection > $startredirection) {
                    521:       while ($Apache::lonxml::redirection > $startredirection) {
                    522: 	  $finaloutput .= &endredirection();
1.387     albertel  523:       }
                    524:   }
1.101     albertel  525:   if (($ENV{'QUERY_STRING'}) && ($target eq 'web')) {
                    526:     $finaloutput=&afterburn($finaloutput);
1.216     sakharuk  527:   }	    
1.101     albertel  528:   return $finaloutput;
                    529: }
1.67      www       530: 
1.318     matthew   531: ## 
                    532: ## Looks to see if there is a subroutine defined for this tag.  If so, call it,
                    533: ## otherwise do not call it as we do not know what it is.
                    534: ##
1.7       albertel  535: sub callsub {
1.84      albertel  536:   my ($sub,$target,$token,$tagstack,$parstack,$parser,$safeeval,$style)=@_;
1.7       albertel  537:   my $currentstring='';
1.72      albertel  538:   my $nodefault;
1.7       albertel  539:   {
1.59      albertel  540:     my $sub1;
1.7       albertel  541:     no strict 'refs';
1.68      www       542:     my $tag=$token->[1];
1.236     www       543: # get utterly rid of extended html tags
                    544:     if ($tag=~/^x\-/i) { return ''; }
1.141     albertel  545:     my $space=$Apache::lonxml::alltags{$tag}[-1];
1.68      www       546:     if (!$space) {
1.141     albertel  547:      	$tag=~tr/A-Z/a-z/;
1.68      www       548: 	$sub=~tr/A-Z/a-z/;
1.141     albertel  549: 	$space=$Apache::lonxml::alltags{$tag}[-1]
1.68      www       550:     }
1.97      albertel  551: 
                    552:     my $deleted=0;
                    553:     $Apache::lonxml::curdepth=join('_',@Apache::lonxml::depthcounter);
                    554:     if (($token->[0] eq 'S') && ($target eq 'modified')) {
                    555:       $deleted=&Apache::edit::handle_delete($space,$target,$token,$tagstack,
                    556: 					     $parstack,$parser,$safeeval,
                    557: 					     $style);
                    558:     }
                    559:     if (!$deleted) {
                    560:       if ($space) {
1.220     albertel  561: 	#&Apache::lonxml::debug("Calling sub $sub in $space $metamode");
1.97      albertel  562: 	$sub1="$space\:\:$sub";
                    563: 	($currentstring,$nodefault) = &$sub1($target,$token,$tagstack,
                    564: 					     $parstack,$parser,$safeeval,
                    565: 					     $style);
                    566:       } else {
1.318     matthew   567:           if ($target eq 'tex') {
                    568:               # throw away tag name
                    569:               return '';
                    570:           }
1.220     albertel  571: 	#&Apache::lonxml::debug("NOT Calling sub $sub in $space $metamode");
1.97      albertel  572: 	if ($metamode <1) {
                    573: 	  if (defined($token->[4]) && ($metamode < 1)) {
                    574: 	    $currentstring = $token->[4];
                    575: 	  } else {
                    576: 	    $currentstring = $token->[2];
                    577: 	  }
1.62      sakharuk  578: 	}
1.7       albertel  579:       }
1.97      albertel  580:       #    &Apache::lonxml::debug("nodefalt:$nodefault:");
                    581:       if ($currentstring eq '' && $nodefault eq '') {
                    582: 	if ($target eq 'edit') {
1.220     albertel  583: 	  #&Apache::lonxml::debug("doing default edit for $token->[1]");
1.97      albertel  584: 	  if ($token->[0] eq 'S') {
                    585: 	    $currentstring = &Apache::edit::tag_start($target,$token);
                    586: 	  } elsif ($token->[0] eq 'E') {
                    587: 	    $currentstring = &Apache::edit::tag_end($target,$token);
                    588: 	  }
                    589: 	} elsif ($target eq 'modified') {
                    590: 	  if ($token->[0] eq 'S') {
                    591: 	    $currentstring = $token->[4];
                    592: 	    $currentstring.=&Apache::edit::handle_insert();
1.210     www       593: 	  } elsif ($token->[0] eq 'E') {
                    594: 	    $currentstring = $token->[2];
                    595:             $currentstring.=&Apache::edit::handle_insertafter($token->[1]);
1.97      albertel  596: 	  } else {
                    597: 	    $currentstring = $token->[2];
                    598: 	  }
1.72      albertel  599: 	}
                    600:       }
1.7       albertel  601:     }
                    602:     use strict 'refs';
                    603:   }
                    604:   return $currentstring;
1.82      ng        605: }
                    606: 
1.96      albertel  607: sub setup_globals {
1.172     albertel  608:   my ($request,$target)=@_;
                    609:   $Apache::lonxml::request=$request;
1.205     www       610:   $errorcount=0;
                    611:   $warningcount=0;
1.207     albertel  612:   $Apache::lonxml::default_homework_loaded=0;
1.212     albertel  613:   $Apache::lonxml::usestyle=1;
1.204     albertel  614:   &init_counter();
1.101     albertel  615:   @Apache::lonxml::pwd=();
1.124     albertel  616:   @Apache::lonxml::extlinks=();
1.281     albertel  617:   @Apache::lonxml::ssi_info=();
1.282     albertel  618:   $Apache::lonxml::post_evaluate=1;
1.295     albertel  619:   $Apache::lonxml::warnings_error_header='';
1.397     albertel  620:   $Apache::lonxml::substitute_LaTeX_symbols = 1;
1.96      albertel  621:   if ($target eq 'meta') {
                    622:     $Apache::lonxml::redirection = 0;
                    623:     $Apache::lonxml::metamode = 1;
                    624:     $Apache::lonxml::evaluate = 1;
                    625:     $Apache::lonxml::import = 0;
1.129     albertel  626:   } elsif ($target eq 'answer') {
                    627:     $Apache::lonxml::redirection = 0;
                    628:     $Apache::lonxml::metamode = 1;
                    629:     $Apache::lonxml::evaluate = 1;
                    630:     $Apache::lonxml::import = 1;
1.96      albertel  631:   } elsif ($target eq 'grade') {
1.387     albertel  632:     &startredirection(); #ended in inner_xmlparse on exit
1.96      albertel  633:     $Apache::lonxml::metamode = 0;
                    634:     $Apache::lonxml::evaluate = 1;
                    635:     $Apache::lonxml::import = 1;
                    636:   } elsif ($target eq 'modified') {
                    637:     $Apache::lonxml::redirection = 0;
                    638:     $Apache::lonxml::metamode = 0;
                    639:     $Apache::lonxml::evaluate = 0;
                    640:     $Apache::lonxml::import = 0;
                    641:   } elsif ($target eq 'edit') {
                    642:     $Apache::lonxml::redirection = 0;
                    643:     $Apache::lonxml::metamode = 0;
                    644:     $Apache::lonxml::evaluate = 0;
                    645:     $Apache::lonxml::import = 0;
1.163     albertel  646:   } elsif ($target eq 'analyze') {
                    647:     $Apache::lonxml::redirection = 0;
                    648:     $Apache::lonxml::metamode = 0;
                    649:     $Apache::lonxml::evaluate = 1;
                    650:     $Apache::lonxml::import = 1;
1.96      albertel  651:   } else {
                    652:     $Apache::lonxml::redirection = 0;
                    653:     $Apache::lonxml::metamode = 0;
                    654:     $Apache::lonxml::evaluate = 1;
                    655:     $Apache::lonxml::import = 1;
                    656:   }
                    657: }
                    658: 
1.82      ng        659: sub init_safespace {
                    660:   my ($target,$safeeval,$safehole,$safeinit) = @_;
1.393     albertel  661:   $safeeval->deny_only(':dangerous');
                    662:   $safeeval->reval('use Math::Complex;');
1.383     albertel  663:   $safeeval->permit_only(":default");
1.82      ng        664:   $safeeval->permit("entereval");
                    665:   $safeeval->permit(":base_math");
                    666:   $safeeval->permit("sort");
1.286     albertel  667:   $safeeval->permit("time");
1.371     albertel  668:   $safeeval->deny("rand");
                    669:   $safeeval->deny("srand");
1.82      ng        670:   $safeeval->deny(":base_io");
1.102     albertel  671:   $safehole->wrap(\&Apache::scripttag::xmlparse,$safeeval,'&xmlparse');
1.251     albertel  672:   $safehole->wrap(\&Apache::outputtags::multipart,$safeeval,'&multipart');
1.82      ng        673:   $safehole->wrap(\&Apache::lonnet::EXT,$safeeval,'&EXT');
1.324     albertel  674:   $safehole->wrap(\&Apache::chemresponse::chem_standard_order,$safeeval,
                    675: 		  '&chem_standard_order');
1.369     albertel  676:   $safehole->wrap(\&Apache::response::check_status,$safeeval,'&check_status');
1.324     albertel  677: 
1.431     www       678:   $safehole->wrap(\&Apache::lonmaxima::maxima_eval,$safeeval,'&maxima_eval');
1.432     www       679:   $safehole->wrap(\&Apache::lonmaxima::maxima_check,$safeeval,'&maxima_check');
1.433     albertel  680:   $safehole->wrap(\&Apache::lonmaxima::maxima_cas_formula_fix,$safeeval,
                    681: 		  '&maxima_cas_formula_fix');
                    682: 
                    683:   $safehole->wrap(\&Apache::caparesponse::capa_formula_fix,$safeeval,
                    684: 		  '&capa_formula_fix');
1.431     www       685: 
1.82      ng        686:   $safehole->wrap(\&Math::Cephes::asin,$safeeval,'&asin');
                    687:   $safehole->wrap(\&Math::Cephes::acos,$safeeval,'&acos');
                    688:   $safehole->wrap(\&Math::Cephes::atan,$safeeval,'&atan');
                    689:   $safehole->wrap(\&Math::Cephes::sinh,$safeeval,'&sinh');
                    690:   $safehole->wrap(\&Math::Cephes::cosh,$safeeval,'&cosh');
                    691:   $safehole->wrap(\&Math::Cephes::tanh,$safeeval,'&tanh');
                    692:   $safehole->wrap(\&Math::Cephes::asinh,$safeeval,'&asinh');
                    693:   $safehole->wrap(\&Math::Cephes::acosh,$safeeval,'&acosh');
                    694:   $safehole->wrap(\&Math::Cephes::atanh,$safeeval,'&atanh');
                    695:   $safehole->wrap(\&Math::Cephes::erf,$safeeval,'&erf');
                    696:   $safehole->wrap(\&Math::Cephes::erfc,$safeeval,'&erfc');
                    697:   $safehole->wrap(\&Math::Cephes::j0,$safeeval,'&j0');
                    698:   $safehole->wrap(\&Math::Cephes::j1,$safeeval,'&j1');
                    699:   $safehole->wrap(\&Math::Cephes::jn,$safeeval,'&jn');
                    700:   $safehole->wrap(\&Math::Cephes::jv,$safeeval,'&jv');
                    701:   $safehole->wrap(\&Math::Cephes::y0,$safeeval,'&y0');
                    702:   $safehole->wrap(\&Math::Cephes::y1,$safeeval,'&y1');
                    703:   $safehole->wrap(\&Math::Cephes::yn,$safeeval,'&yn');
                    704:   $safehole->wrap(\&Math::Cephes::yv,$safeeval,'&yv');
1.215     albertel  705:   
                    706:   $safehole->wrap(\&Math::Cephes::bdtr  ,$safeeval,'&bdtr'  );
                    707:   $safehole->wrap(\&Math::Cephes::bdtrc ,$safeeval,'&bdtrc' );
                    708:   $safehole->wrap(\&Math::Cephes::bdtri ,$safeeval,'&bdtri' );
                    709:   $safehole->wrap(\&Math::Cephes::btdtr ,$safeeval,'&btdtr' );
                    710:   $safehole->wrap(\&Math::Cephes::chdtr ,$safeeval,'&chdtr' );
                    711:   $safehole->wrap(\&Math::Cephes::chdtrc,$safeeval,'&chdtrc');
                    712:   $safehole->wrap(\&Math::Cephes::chdtri,$safeeval,'&chdtri');
                    713:   $safehole->wrap(\&Math::Cephes::fdtr  ,$safeeval,'&fdtr'  );
                    714:   $safehole->wrap(\&Math::Cephes::fdtrc ,$safeeval,'&fdtrc' );
                    715:   $safehole->wrap(\&Math::Cephes::fdtri ,$safeeval,'&fdtri' );
                    716:   $safehole->wrap(\&Math::Cephes::gdtr  ,$safeeval,'&gdtr'  );
                    717:   $safehole->wrap(\&Math::Cephes::gdtrc ,$safeeval,'&gdtrc' );
                    718:   $safehole->wrap(\&Math::Cephes::nbdtr ,$safeeval,'&nbdtr' );
                    719:   $safehole->wrap(\&Math::Cephes::nbdtrc,$safeeval,'&nbdtrc');
                    720:   $safehole->wrap(\&Math::Cephes::nbdtri,$safeeval,'&nbdtri');
                    721:   $safehole->wrap(\&Math::Cephes::ndtr  ,$safeeval,'&ndtr'  );
                    722:   $safehole->wrap(\&Math::Cephes::ndtri ,$safeeval,'&ndtri' );
                    723:   $safehole->wrap(\&Math::Cephes::pdtr  ,$safeeval,'&pdtr'  );
                    724:   $safehole->wrap(\&Math::Cephes::pdtrc ,$safeeval,'&pdtrc' );
                    725:   $safehole->wrap(\&Math::Cephes::pdtri ,$safeeval,'&pdtri' );
                    726:   $safehole->wrap(\&Math::Cephes::stdtr ,$safeeval,'&stdtr' );
                    727:   $safehole->wrap(\&Math::Cephes::stdtri,$safeeval,'&stdtri');
                    728: 
1.383     albertel  729:   $safehole->wrap(\&Math::Cephes::Matrix::mat,$safeeval,'&mat');
                    730:   $safehole->wrap(\&Math::Cephes::Matrix::new,$safeeval,
                    731: 		  '&Math::Cephes::Matrix::new');
                    732:   $safehole->wrap(\&Math::Cephes::Matrix::coef,$safeeval,
                    733: 		  '&Math::Cephes::Matrix::coef');
                    734:   $safehole->wrap(\&Math::Cephes::Matrix::clr,$safeeval,
                    735: 		  '&Math::Cephes::Matrix::clr');
                    736:   $safehole->wrap(\&Math::Cephes::Matrix::add,$safeeval,
                    737: 		  '&Math::Cephes::Matrix::add');
                    738:   $safehole->wrap(\&Math::Cephes::Matrix::sub,$safeeval,
                    739: 		  '&Math::Cephes::Matrix::sub');
                    740:   $safehole->wrap(\&Math::Cephes::Matrix::mul,$safeeval,
                    741: 		  '&Math::Cephes::Matrix::mul');
                    742:   $safehole->wrap(\&Math::Cephes::Matrix::div,$safeeval,
                    743: 		  '&Math::Cephes::Matrix::div');
                    744:   $safehole->wrap(\&Math::Cephes::Matrix::inv,$safeeval,
                    745: 		  '&Math::Cephes::Matrix::inv');
                    746:   $safehole->wrap(\&Math::Cephes::Matrix::transp,$safeeval,
                    747: 		  '&Math::Cephes::Matrix::transp');
                    748:   $safehole->wrap(\&Math::Cephes::Matrix::simq,$safeeval,
                    749: 		  '&Math::Cephes::Matrix::simq');
                    750:   $safehole->wrap(\&Math::Cephes::Matrix::mat_to_vec,$safeeval,
                    751: 		  '&Math::Cephes::Matrix::mat_to_vec');
                    752:   $safehole->wrap(\&Math::Cephes::Matrix::vec_to_mat,$safeeval,
                    753: 		  '&Math::Cephes::Matrix::vec_to_mat');
                    754:   $safehole->wrap(\&Math::Cephes::Matrix::check,$safeeval,
                    755: 		  '&Math::Cephes::Matrix::check');
                    756:   $safehole->wrap(\&Math::Cephes::Matrix::check,$safeeval,
                    757: 		  '&Math::Cephes::Matrix::check');
                    758: 
1.215     albertel  759: #  $safehole->wrap(\&Math::Cephes::new_fract,$safeeval,'&new_fract');
                    760: #  $safehole->wrap(\&Math::Cephes::radd,$safeeval,'&radd');
                    761: #  $safehole->wrap(\&Math::Cephes::rsub,$safeeval,'&rsub');
                    762: #  $safehole->wrap(\&Math::Cephes::rmul,$safeeval,'&rmul');
                    763: #  $safehole->wrap(\&Math::Cephes::rdiv,$safeeval,'&rdiv');
                    764: #  $safehole->wrap(\&Math::Cephes::euclid,$safeeval,'&euclid');
                    765: 
1.91      ng        766:   $safehole->wrap(\&Math::Random::random_beta,$safeeval,'&math_random_beta');
                    767:   $safehole->wrap(\&Math::Random::random_chi_square,$safeeval,'&math_random_chi_square');
                    768:   $safehole->wrap(\&Math::Random::random_exponential,$safeeval,'&math_random_exponential');
                    769:   $safehole->wrap(\&Math::Random::random_f,$safeeval,'&math_random_f');
                    770:   $safehole->wrap(\&Math::Random::random_gamma,$safeeval,'&math_random_gamma');
                    771:   $safehole->wrap(\&Math::Random::random_multivariate_normal,$safeeval,'&math_random_multivariate_normal');
                    772:   $safehole->wrap(\&Math::Random::random_multinomial,$safeeval,'&math_random_multinomial');
                    773:   $safehole->wrap(\&Math::Random::random_noncentral_chi_square,$safeeval,'&math_random_noncentral_chi_square');
                    774:   $safehole->wrap(\&Math::Random::random_noncentral_f,$safeeval,'&math_random_noncentral_f');
                    775:   $safehole->wrap(\&Math::Random::random_normal,$safeeval,'&math_random_normal');
                    776:   $safehole->wrap(\&Math::Random::random_permutation,$safeeval,'&math_random_permutation');
1.93      ng        777:   $safehole->wrap(\&Math::Random::random_permuted_index,$safeeval,'&math_random_permuted_index');
1.91      ng        778:   $safehole->wrap(\&Math::Random::random_uniform,$safeeval,'&math_random_uniform');
                    779:   $safehole->wrap(\&Math::Random::random_poisson,$safeeval,'&math_random_poisson');
                    780:   $safehole->wrap(\&Math::Random::random_uniform_integer,$safeeval,'&math_random_uniform_integer');
                    781:   $safehole->wrap(\&Math::Random::random_negative_binomial,$safeeval,'&math_random_negative_binomial');
                    782:   $safehole->wrap(\&Math::Random::random_binomial,$safeeval,'&math_random_binomial');
                    783:   $safehole->wrap(\&Math::Random::random_seed_from_phrase,$safeeval,'&random_seed_from_phrase');
                    784:   $safehole->wrap(\&Math::Random::random_set_seed_from_phrase,$safeeval,'&random_set_seed_from_phrase');
                    785:   $safehole->wrap(\&Math::Random::random_get_seed,$safeeval,'&random_get_seed');
                    786:   $safehole->wrap(\&Math::Random::random_set_seed,$safeeval,'&random_set_seed');
1.305     albertel  787:   $safehole->wrap(\&Apache::lonxml::error,$safeeval,'&LONCAPA_INTERNAL_ERROR');
1.311     albertel  788:   $safehole->wrap(\&Apache::lonxml::debug,$safeeval,'&LONCAPA_INTERNAL_DEBUG');
1.420     albertel  789:   $safehole->wrap(\&Apache::lonnet::logthis,$safeeval,'&LONCAPA_INTERNAL_LOGTHIS');
                    790:   $safehole->wrap(\&Apache::inputtags::finalizeawards,$safeeval,'&LONCAPA_INTERNAL_FINALIZEAWARDS');
1.322     albertel  791:   $safehole->wrap(\&Apache::caparesponse::get_sigrange,$safeeval,'&LONCAPA_INTERNAL_get_sigrange');
1.430     albertel  792: #  use Data::Dumper;
                    793: #  $safehole->wrap(\&Data::Dumper::Dumper,$safeeval,'&LONCAPA_INTERNAL_Dumper');
1.82      ng        794: #need to inspect this class of ops
                    795: # $safeeval->deny(":base_orig");
1.331     albertel  796:   $safeeval->permit("require");
1.91      ng        797:   $safeinit .= ';$external::target="'.$target.'";';
1.82      ng        798:   &Apache::run::run($safeinit,$safeeval);
1.373     albertel  799:   &initialize_rndseed($safeeval);
                    800: }
1.303     albertel  801: 
1.393     albertel  802: sub clean_safespace {
                    803:     my ($safeeval) = @_;
                    804:     delete_package_recurse($safeeval->{Root});
                    805: }
                    806: 
                    807: sub delete_package_recurse {
                    808:      my ($package) = @_;
                    809:      my @subp;
                    810:      {
                    811: 	 no strict 'refs';
                    812: 	 while (my ($key,$val) = each(%{*{"$package\::"}})) {
                    813: 	     if (!defined($val)) { next; }
                    814: 	     local (*ENTRY) = $val;
                    815: 	     if (defined *ENTRY{HASH} && $key =~ /::$/ &&
                    816: 		 $key ne "main::" && $key ne "<none>::")
                    817: 	     {
                    818: 		 my ($p) = $package ne "main" ? "$package\::" : "";
                    819: 		 ($p .= $key) =~ s/::$//;
                    820: 		 push(@subp,$p);
                    821: 	     }
                    822: 	 }
                    823:      }
                    824:      foreach my $p (@subp) {
                    825: 	 delete_package_recurse($p);
                    826:      }
                    827:      Symbol::delete_package($package);
                    828: }
                    829: 
1.373     albertel  830: sub initialize_rndseed {
                    831:     my ($safeeval)=@_;
                    832:     my $rndseed;
1.423     albertel  833:     my ($symb,$courseid,$domain,$name) = &Apache::lonnet::whichuser();
1.373     albertel  834:     $rndseed=&Apache::lonnet::rndseed($symb,$courseid,$domain,$name);
                    835:     my $safeinit = '$external::randomseed="'.$rndseed.'";';
                    836:     &Apache::lonxml::debug("Setting rndseed to $rndseed");
                    837:     &Apache::run::run($safeinit,$safeeval);
1.207     albertel  838: }
                    839: 
                    840: sub default_homework_load {
                    841:     my ($safeeval)=@_;
                    842:     &Apache::lonxml::debug('Loading default_homework');
                    843:     my $default=&Apache::lonnet::getfile('/home/httpd/html/res/adm/includes/default_homework.lcpm');
1.241     albertel  844:     if ($default eq -1) {
1.207     albertel  845: 	&Apache::lonxml::error("<b>Unable to find <i>default_homework.lcpm</i></b>");
                    846:     } else {
                    847: 	&Apache::run::run($default,$safeeval);
                    848: 	$Apache::lonxml::default_homework_loaded=1;
                    849:     }
1.17      albertel  850: }
                    851: 
1.358     albertel  852: {
                    853:     my $alarm_depth;
                    854:     sub init_alarm {
                    855: 	alarm(0);
                    856: 	$alarm_depth=0;
                    857:     }
                    858: 
                    859:     sub start_alarm {
                    860: 	if ($alarm_depth<1) {
                    861: 	    my $old=alarm($Apache::lonnet::perlvar{'lonScriptTimeout'});
                    862: 	    if ($old) {
                    863: 		&Apache::lonxml::error("Cancelled an alarm of $old, this shouldn't occur.");
                    864: 	    }
                    865: 	}
                    866: 	$alarm_depth++;
                    867:     }
                    868: 
                    869:     sub end_alarm {
                    870: 	$alarm_depth--;
                    871: 	if ($alarm_depth<1) { alarm(0); }
                    872:     }
                    873: }
1.328     albertel  874: my $metamode_was;
1.55      albertel  875: sub startredirection {
1.328     albertel  876:     if (!$Apache::lonxml::redirection) {
                    877: 	$metamode_was=$Apache::lonxml::metamode;
                    878:     }
                    879:     $Apache::lonxml::metamode=0;
                    880:     $Apache::lonxml::redirection++;
                    881:     push (@Apache::lonxml::outputstack, '');
1.55      albertel  882: }
                    883: 
                    884: sub endredirection {
1.328     albertel  885:     if (!$Apache::lonxml::redirection) {
1.380     www       886: 	&Apache::lonxml::error("Endredirection was called before a startredirection, perhaps you have unbalanced tags. Some debugging information:".join ":",caller);
1.328     albertel  887: 	return '';
                    888:     }
                    889:     $Apache::lonxml::redirection--;
                    890:     if (!$Apache::lonxml::redirection) {
                    891: 	$Apache::lonxml::metamode=$metamode_was;
                    892:     }
                    893:     pop @Apache::lonxml::outputstack;
1.97      albertel  894: }
                    895: 
                    896: sub end_tag {
                    897:   my ($tagstack,$parstack,$token)=@_;
                    898:   pop(@$tagstack);
                    899:   pop(@$parstack);
                    900:   &decreasedepth($token);
1.55      albertel  901: }
                    902: 
1.17      albertel  903: sub initdepth {
                    904:   @Apache::lonxml::depthcounter=();
                    905:   $Apache::lonxml::depth=-1;
                    906:   $Apache::lonxml::olddepth=-1;
                    907: }
                    908: 
1.339     albertel  909: my @timers;
                    910: my $lasttime;
1.17      albertel  911: sub increasedepth {
1.19      albertel  912:   my ($token) = @_;
1.17      albertel  913:   $Apache::lonxml::depth++;
                    914:   $Apache::lonxml::depthcounter[$Apache::lonxml::depth]++;
                    915:   if ($Apache::lonxml::depthcounter[$Apache::lonxml::depth]==1) {
                    916:     $Apache::lonxml::olddepth=$Apache::lonxml::depth;
                    917:   }
1.340     albertel  918:   my $time;
                    919:   if ($Apache::lonxml::debug eq "1") {
                    920:       push(@timers,[&gettimeofday()]);
                    921:       $time=&tv_interval($lasttime);
                    922:       $lasttime=[&gettimeofday()];
                    923:   }
1.339     albertel  924:   my $spacing='  'x($Apache::lonxml::depth-1);
1.42      albertel  925:   my $curdepth=join('_',@Apache::lonxml::depthcounter);
1.339     albertel  926:   &Apache::lonxml::debug("s$spacing$Apache::lonxml::depth : $Apache::lonxml::olddepth : $curdepth : $token->[1] : $time : \n");
1.54      albertel  927: #print "<br />s $Apache::lonxml::depth : $Apache::lonxml::olddepth : $curdepth : $token->[1]\n";
1.17      albertel  928: }
                    929: 
                    930: sub decreasedepth {
1.19      albertel  931:   my ($token) = @_;
1.17      albertel  932:   $Apache::lonxml::depth--;
1.36      albertel  933:   if ($Apache::lonxml::depth<$Apache::lonxml::olddepth-1) {
                    934:     $#Apache::lonxml::depthcounter--;
                    935:     $Apache::lonxml::olddepth=$Apache::lonxml::depth+1;
                    936:   }
1.43      albertel  937:   if (  $Apache::lonxml::depth < -1) {
1.280     www       938:     &Apache::lonxml::warning(&mt("Missing tags, unable to properly run file."));
1.43      albertel  939:     $Apache::lonxml::depth='-1';
                    940:   }
1.340     albertel  941:   my ($timer,$time);
                    942:   if ($Apache::lonxml::debug eq "1") {
                    943:       $timer=pop(@timers);
                    944:       $time=&tv_interval($lasttime);
                    945:       $lasttime=[&gettimeofday()];
                    946:   }
1.339     albertel  947:   my $spacing='  'x$Apache::lonxml::depth;
1.42      albertel  948:   my $curdepth=join('_',@Apache::lonxml::depthcounter);
1.339     albertel  949:   &Apache::lonxml::debug("e$spacing$Apache::lonxml::depth : $Apache::lonxml::olddepth : $curdepth : $token->[1] : $time : ".&tv_interval($timer)."\n");
1.54      albertel  950: #print "<br />e $Apache::lonxml::depth : $Apache::lonxml::olddepth : $token->[1] : $curdepth\n";
1.1       sakharuk  951: }
1.19      albertel  952: 
1.399     albertel  953: sub get_id {
                    954:     my ($parstack,$safeeval)=@_;
                    955:     my $id= &Apache::lonxml::get_param('id',$parstack,$safeeval);
                    956:     if ($env{'request.state'} eq 'construct' && $id =~ /(\.|_)/) {
                    957: 	&error(&mt("IDs are not allowed to contain &quot;<tt>_</tt>&quot; or &quot;<tt>.</tt>&quot;"));
                    958:     }
                    959:     if ($id =~ /^\s*$/) { $id = $Apache::lonxml::curdepth; }
                    960:     return $id;
                    961: }
                    962: 
1.180     albertel  963: sub get_all_text_unbalanced {
1.190     albertel  964: #there is a copy of this in lonpublisher.pm
1.326     albertel  965:     my($tag,$pars)= @_;
                    966:     my $token;
                    967:     my $result='';
                    968:     $tag='<'.$tag.'>';
                    969:     while ($token = $$pars[-1]->get_token) {
                    970: 	if (($token->[0] eq 'T')||($token->[0] eq 'C')||($token->[0] eq 'D')) {
1.386     albertel  971: 	    if ($token->[0] eq 'T' && $token->[2]) {
1.382     albertel  972: 		$result.='<![CDATA['.$token->[1].']]>';
                    973: 	    } else {
                    974: 		$result.=$token->[1];
                    975: 	    }
1.326     albertel  976: 	} elsif ($token->[0] eq 'PI') {
                    977: 	    $result.=$token->[2];
                    978: 	} elsif ($token->[0] eq 'S') {
                    979: 	    $result.=$token->[4];
                    980: 	} elsif ($token->[0] eq 'E')  {
                    981: 	    $result.=$token->[2];
                    982: 	}
                    983: 	if ($result =~ /\Q$tag\E/is) {
                    984: 	    ($result,my $redo)=$result =~ /(.*)\Q$tag\E(.*)/is;
                    985: 	    #&Apache::lonxml::debug('Got a winner with leftovers ::'.$2);
                    986: 	    #&Apache::lonxml::debug('Result is :'.$1);
                    987: 	    $redo=$tag.$redo;
                    988: 	    &Apache::lonxml::newparser($pars,\$redo);
                    989: 	    last;
                    990: 	}
                    991:     }
                    992:     return $result
1.204     albertel  993: }
                    994: 
                    995: sub increment_counter {
1.247     albertel  996:     my ($increment) = @_;
1.289     sakharuk  997:     if (defined($increment) && $increment gt 0) {
                    998: 	$Apache::lonxml::counter+=$increment;
                    999:     } else {
                   1000: 	$Apache::lonxml::counter++;
1.247     albertel 1001:     }
1.289     sakharuk 1002:     $Apache::lonxml::counter_changed=1;
1.204     albertel 1003: }
                   1004: 
                   1005: sub init_counter {
1.391     albertel 1006:     if ($env{'request.state'} eq 'construct') {
                   1007: 	$Apache::lonxml::counter=1;
                   1008: 	$Apache::lonxml::counter_changed=1;
                   1009:     } elsif (defined($env{'form.counter'})) {
1.372     albertel 1010: 	$Apache::lonxml::counter=$env{'form.counter'};
1.247     albertel 1011: 	$Apache::lonxml::counter_changed=0;
1.237     sakharuk 1012:     } else {
1.204     albertel 1013: 	$Apache::lonxml::counter=1;
1.247     albertel 1014: 	$Apache::lonxml::counter_changed=1;
1.204     albertel 1015:     }
                   1016: }
                   1017: 
                   1018: sub store_counter {
                   1019:     &Apache::lonnet::appenv(('form.counter' => $Apache::lonxml::counter));
1.401     albertel 1020:     $Apache::lonxml::counter_changed=0;
1.204     albertel 1021:     return '';
1.180     albertel 1022: }
                   1023: 
1.398     albertel 1024: {
                   1025:     my $state;
                   1026:     sub clear_problem_counter {
                   1027: 	undef($state);
                   1028: 	&Apache::lonnet::delenv('form.counter');
                   1029: 	&Apache::lonxml::init_counter();
                   1030: 	&Apache::lonxml::store_counter();
                   1031:     }
                   1032: 
                   1033:     sub remember_problem_counter {
1.422     albertel 1034: 	&Apache::lonnet::transfer_profile_to_env(undef,undef,1);
1.398     albertel 1035: 	$state = $env{'form.counter'};
                   1036:     }
                   1037: 
                   1038:     sub restore_problem_counter {
                   1039: 	if (defined($state)) {
                   1040: 	    &Apache::lonnet::appenv(('form.counter' => $state));
                   1041: 	}
                   1042:     }
1.401     albertel 1043:     sub get_problem_counter {
                   1044: 	if ($Apache::lonxml::counter_changed) { &store_counter() }
1.422     albertel 1045: 	&Apache::lonnet::transfer_profile_to_env(undef,undef,1);
1.401     albertel 1046: 	return $env{'form.counter'};
                   1047:     }
1.398     albertel 1048: }
                   1049: 
1.19      albertel 1050: sub get_all_text {
1.270     albertel 1051:     my($tag,$pars,$style)= @_;
                   1052:     my $gotfullstack=1;
                   1053:     if (ref($pars) ne 'ARRAY') {
                   1054: 	$gotfullstack=0;
                   1055: 	$pars=[$pars];
                   1056:     }
                   1057:     if (ref($style) ne 'HASH') {
                   1058: 	$style={};
                   1059:     }
                   1060:     my $depth=0;
                   1061:     my $token;
                   1062:     my $result='';
                   1063:     if ( $tag =~ m:^/: ) { 
                   1064: 	my $tag=substr($tag,1); 
                   1065: 	#&Apache::lonxml::debug("have:$tag:");
                   1066: 	my $top_empty=0;
                   1067: 	while (($depth >=0) && ($#$pars > -1) && (!$top_empty)) {
                   1068: 	    while (($depth >=0) && ($token = $$pars[-1]->get_token)) {
                   1069: 		#&Apache::lonxml::debug("e token:$token->[0]:$depth:$token->[1]:".$#$pars.":".$#Apache::lonxml::pwd);
                   1070: 		if (($token->[0] eq 'T')||($token->[0] eq 'C')||($token->[0] eq 'D')) {
1.382     albertel 1071: 		    if ($token->[2]) {
                   1072: 			$result.='<![CDATA['.$token->[1].']]>';
                   1073: 		    } else {
                   1074: 			$result.=$token->[1];
                   1075: 		    }
1.270     albertel 1076: 		} elsif ($token->[0] eq 'PI') {
                   1077: 		    $result.=$token->[2];
                   1078: 		} elsif ($token->[0] eq 'S') {
1.316     albertel 1079: 		    if ($token->[1] =~ /^\Q$tag\E$/i) { $depth++; }
                   1080: 		    if ($token->[1] =~ /^LONCAPA_INTERNAL_TURN_STYLE_ON$/) { $Apache::lonxml::usestyle=1; }
                   1081: 		    if ($token->[1] =~ /^LONCAPA_INTERNAL_TURN_STYLE_OFF$/) { $Apache::lonxml::usestyle=0; }
1.270     albertel 1082: 		    $result.=$token->[4];
                   1083: 		} elsif ($token->[0] eq 'E')  {
1.316     albertel 1084: 		    if ( $token->[1] =~ /^\Q$tag\E$/i) { $depth--; }
1.270     albertel 1085: 		    #skip sending back the last end tag
1.283     albertel 1086: 		    if ($depth == 0 && exists($$style{'/'.$token->[1]}) && $Apache::lonxml::usestyle) {
1.270     albertel 1087: 			my $string=
                   1088: 			    '<LONCAPA_INTERNAL_TURN_STYLE_OFF end="yes" />'.
                   1089: 				$$style{'/'.$token->[1]}.
                   1090: 				    $token->[2].
                   1091: 					'<LONCAPA_INTERNAL_TURN_STYLE_ON />';
                   1092: 			&Apache::lonxml::newparser($pars,\$string);
                   1093: 			#&Apache::lonxml::debug("reParsing $string");
                   1094: 			next;
                   1095: 		    }
                   1096: 		    if ($depth > -1) {
                   1097: 			$result.=$token->[2];
                   1098: 		    } else {
                   1099: 			$$pars[-1]->unget_token($token);
                   1100: 		    }
                   1101: 		}
                   1102: 	    }
                   1103: 	    if (($depth >=0) && ($#$pars == 0) ) { $top_empty=1; }
                   1104: 	    if (($depth >=0) && ($#$pars > 0) ) {
                   1105: 		pop(@$pars);
                   1106: 		pop(@Apache::lonxml::pwd);
                   1107: 	    }
                   1108: 	}
                   1109: 	if ($top_empty && $depth >= 0) {
                   1110: 	    #never found the end tag ran out of text, throw error send back blank
                   1111: 	    &error('Never found end tag for &lt;'.$tag.
                   1112: 		   '&gt; current string <pre>'.
1.314     albertel 1113: 		   &HTML::Entities::encode($result,'<>&"').
1.270     albertel 1114: 		   '</pre>');
                   1115: 	    if ($gotfullstack) {
                   1116: 		my $newstring='</'.$tag.'>'.$result;
                   1117: 		&Apache::lonxml::newparser($pars,\$newstring);
                   1118: 	    }
                   1119: 	    $result='';
                   1120: 	}
                   1121:     } else {
                   1122: 	while ($#$pars > -1) {
                   1123: 	    while ($token = $$pars[-1]->get_token) {
                   1124: 		#&Apache::lonxml::debug("s token:$token->[0]:$depth:$token->[1]");
                   1125: 		if (($token->[0] eq 'T')||($token->[0] eq 'C')||
                   1126: 		    ($token->[0] eq 'D')) {
1.382     albertel 1127: 		    if ($token->[2]) {
                   1128: 			$result.='<![CDATA['.$token->[1].']]>';
                   1129: 		    } else {
                   1130: 			$result.=$token->[1];
                   1131: 		    }
1.270     albertel 1132: 		} elsif ($token->[0] eq 'PI') {
                   1133: 		    $result.=$token->[2];
                   1134: 		} elsif ($token->[0] eq 'S') {
1.316     albertel 1135: 		    if ( $token->[1] =~ /^\Q$tag\E$/i) {
1.270     albertel 1136: 			$$pars[-1]->unget_token($token); last;
                   1137: 		    } else {
                   1138: 			$result.=$token->[4];
                   1139: 		    }
1.316     albertel 1140: 		    if ($token->[1] =~ /^LONCAPA_INTERNAL_TURN_STYLE_ON$/) { $Apache::lonxml::usestyle=1; }
                   1141: 		    if ($token->[1] =~ /^LONCAPA_INTERNAL_TURN_STYLE_OFF$/) { $Apache::lonxml::usestyle=0; }
1.270     albertel 1142: 		} elsif ($token->[0] eq 'E')  {
                   1143: 		    $result.=$token->[2];
                   1144: 		}
                   1145: 	    }
                   1146: 	    if (($#$pars > 0) ) {
                   1147: 		pop(@$pars);
                   1148: 		pop(@Apache::lonxml::pwd);
                   1149: 	    } else { last; }
                   1150: 	}
                   1151:     }
                   1152:     #&Apache::lonxml::debug("Exit:$result:");
                   1153:     return $result
1.19      albertel 1154: }
                   1155: 
1.23      albertel 1156: sub newparser {
                   1157:   my ($parser,$contentref,$dir) = @_;
1.167     albertel 1158:   push (@$parser,HTML::LCParser->new($contentref));
1.365     albertel 1159:   $$parser[-1]->xml_mode(1);
                   1160:   $$parser[-1]->marked_sections(1);
1.23      albertel 1161:   if ( $dir eq '' ) {
                   1162:     push (@Apache::lonxml::pwd, $Apache::lonxml::pwd[$#Apache::lonxml::pwd]);
                   1163:   } else {
                   1164:     push (@Apache::lonxml::pwd, $dir);
                   1165:   } 
                   1166: }
1.1       sakharuk 1167: 
1.8       albertel 1168: sub parstring {
1.417     albertel 1169:     my ($token) = @_;
                   1170:     my (@vars,@values);
                   1171:     foreach my $attr (@{$token->[3]}) {
                   1172: 	if ($attr!~/\W/) {
                   1173: 	    my $val=$token->[2]->{$attr};
                   1174: 	    $val =~ s/([\%\@\\\"\'])/\\$1/g;
                   1175: 	    $val =~ s/(\$[^\{a-zA-Z_])/\\$1/g;
                   1176: 	    $val =~ s/(\$)$/\\$1/;
                   1177: 	    #if ($val =~ m/^[\%\@]/) { $val="\\".$val; }
                   1178: 	    push(@vars,"\$$attr");
                   1179: 	    push(@values,"\"$val\"");
                   1180: 	}
                   1181:     }
                   1182:     my $var_init = 
                   1183: 	(@vars) ? 'my ('.join(',',@vars).') = ('.join(',',@values).');'
                   1184: 	        : '';
                   1185:     return $var_init;
1.8       albertel 1186: }
1.22      albertel 1187: 
1.384     albertel 1188: sub extlink {
                   1189:     my ($res,$exact)=@_;
                   1190:     if (!$exact) {
                   1191: 	$res=&Apache::lonnet::hreflocation($Apache::lonxml::pwd[-1],$res);
                   1192:     }
                   1193:     push(@Apache::lonxml::extlinks,$res)	 
                   1194: }
                   1195: 
1.34      www      1196: sub writeallows {
1.126     www      1197:     unless ($#extlinks>=0) { return; }
1.377     albertel 1198:     my $thisurl = &Apache::lonnet::clutter(shift);
1.372     albertel 1199:     if ($env{'httpref.'.$thisurl}) {
                   1200: 	$thisurl=$env{'httpref.'.$thisurl};
1.111     www      1201:     }
1.34      www      1202:     my $thisdir=$thisurl;
                   1203:     $thisdir=~s/\/[^\/]+$//;
                   1204:     my %httpref=();
1.142     albertel 1205:     foreach (@extlinks) {
1.34      www      1206:        $httpref{'httpref.'.
1.125     www      1207:  	        &Apache::lonnet::hreflocation($thisdir,$_)}=$thisurl;
1.142     albertel 1208:     }
1.126     www      1209:     @extlinks=();
1.34      www      1210:     &Apache::lonnet::appenv(%httpref);
                   1211: }
                   1212: 
1.281     albertel 1213: sub register_ssi {
                   1214:     my ($url,%form)=@_;
                   1215:     push (@Apache::lonxml::ssi_info,{'url'=>$url,'form'=>\%form});
                   1216:     return '';
                   1217: }
                   1218: 
                   1219: sub do_registered_ssi {
                   1220:     foreach my $info (@Apache::lonxml::ssi_info) {
                   1221: 	my %form=%{ $info->{'form'}};
                   1222: 	my $url=$info->{'url'};
                   1223: 	&Apache::lonnet::ssi($url,%form);
                   1224:     }
                   1225: }
1.66      www      1226: #
                   1227: # Afterburner handles anchors, highlights and links
                   1228: #
                   1229: sub afterburn {
                   1230:     my $result=shift;
1.154     albertel 1231:     &Apache::loncommon::get_unprocessed_cgi($ENV{'QUERY_STRING'},
                   1232: 					    ['highlight','anchor','link']);
1.372     albertel 1233:     if ($env{'form.highlight'}) {
                   1234:        foreach (split(/\,/,$env{'form.highlight'})) {
1.66      www      1235:            my $anchorname=$_;
                   1236: 	   my $matchthis=$anchorname;
                   1237:            $matchthis=~s/\_+/\\s\+/g;
1.317     albertel 1238:            $result=~s/(\Q$matchthis\E)/\<font color=\"red\"\>$1\<\/font\>/gs;
1.142     albertel 1239:        }
1.66      www      1240:     }
1.372     albertel 1241:     if ($env{'form.link'}) {
                   1242:        foreach (split(/\,/,$env{'form.link'})) {
1.66      www      1243:            my ($anchorname,$linkurl)=split(/\>/,$_);
                   1244: 	   my $matchthis=$anchorname;
                   1245:            $matchthis=~s/\_+/\\s\+/g;
1.317     albertel 1246:            $result=~s/(\Q$matchthis\E)/\<a href=\"$linkurl\"\>$1\<\/a\>/gs;
1.142     albertel 1247:        }
1.66      www      1248:     }
1.372     albertel 1249:     if ($env{'form.anchor'}) {
                   1250:         my $anchorname=$env{'form.anchor'};
1.66      www      1251: 	my $matchthis=$anchorname;
                   1252:         $matchthis=~s/\_+/\\s\+/g;
1.317     albertel 1253:         $result=~s/(\Q$matchthis\E)/\<a name=\"$anchorname\"\>$1\<\/a\>/s;
1.66      www      1254:         $result.=(<<"ENDSCRIPT");
1.226     albertel 1255: <script type="text/javascript">
1.66      www      1256:     document.location.hash='$anchorname';
                   1257: </script>
                   1258: ENDSCRIPT
                   1259:     }
                   1260:     return $result;
                   1261: }
                   1262: 
1.79      www      1263: sub storefile {
                   1264:     my ($file,$contents)=@_;
1.290     albertel 1265:     &Apache::lonnet::correct_line_ends(\$contents);
1.79      www      1266:     if (my $fh=Apache::File->new('>'.$file)) {
                   1267: 	print $fh $contents;
                   1268:         $fh->close();
1.271     www      1269:         return 1;
1.147     albertel 1270:     } else {
1.271     www      1271: 	&warning("Unable to save file $file");
                   1272: 	return 0;
1.79      www      1273:     }
                   1274: }
                   1275: 
1.151     albertel 1276: sub createnewhtml {
1.321     www      1277:     my $title=&mt('Title of document goes here');
                   1278:     my $body=&mt('Body of document goes here');
                   1279:     my $filecontents=(<<SIMPLECONTENT);
1.78      www      1280: <html>
                   1281: <head>
1.321     www      1282: <title>$title</title>
1.78      www      1283: </head>
                   1284: <body bgcolor="#FFFFFF">
1.321     www      1285: $body
1.78      www      1286: </body>
                   1287: </html>
                   1288: SIMPLECONTENT
1.321     www      1289:     return $filecontents;
1.151     albertel 1290: }
                   1291: 
1.274     albertel 1292: sub createnewsty {
                   1293:   my $filecontents=(<<SIMPLECONTENT);
                   1294: <definetag name="">
                   1295:     <render>
                   1296:        <web></web>
                   1297:        <tex></tex>
                   1298:     </render>
                   1299: </definetag>
                   1300: SIMPLECONTENT
                   1301:   return $filecontents;
                   1302: }
                   1303: 
1.147     albertel 1304: 
1.151     albertel 1305: sub inserteditinfo {
1.274     albertel 1306:       my ($result,$filecontents,$filetype)=@_;
1.314     albertel 1307:       $filecontents = &HTML::Entities::encode($filecontents,'<>&"');
1.147     albertel 1308: #      my $editheader='<a href="#editsection">Edit below</a><hr />';
1.274     albertel 1309:       my $xml_help = '';
1.321     www      1310:       my $initialize='';
1.274     albertel 1311:       if ($filetype eq 'html') {
1.323     www      1312: 	  my $addbuttons=&Apache::lonhtmlcommon::htmlareaaddbuttons();
1.410     albertel 1313: 	  $initialize=&Apache::lonhtmlcommon::spellheader();
1.347     albertel 1314: 	  if (!&Apache::lonhtmlcommon::htmlareablocked() &&
                   1315: 	      &Apache::lonhtmlcommon::htmlareabrowser()) {
                   1316: 	      $initialize.=(<<FULLPAGE);
1.321     www      1317: <script type="text/javascript">
1.323     www      1318: $addbuttons
                   1319: 
1.321     www      1320:     HTMLArea.loadPlugin("FullPage");
                   1321: 
                   1322:     function initDocument() {
1.323     www      1323: 	var editor=new HTMLArea("filecont",config);
1.321     www      1324: 	editor.registerPlugin(FullPage);
                   1325: 	editor.generate();
                   1326:     }
                   1327: </script>
                   1328: FULLPAGE
1.347     albertel 1329:           } else {
                   1330: 	      $initialize.=(<<FULLPAGE);
                   1331: <script type="text/javascript">
                   1332: $addbuttons
                   1333:     function initDocument() {
                   1334:     }
                   1335: </script>
                   1336: FULLPAGE
                   1337: 	  }
1.321     www      1338:           $result=~s/\<body([^\>]*)\>/\<body onload="initDocument()" $1\>/i;
                   1339: 	  $xml_help=&Apache::loncommon::helpLatexCheatsheet();
1.274     albertel 1340:       }
                   1341:       my $cleanbut = '';
1.374     www      1342: 
1.254     albertel 1343:       my $titledisplay=&display_title();
1.426     banghart 1344:       my %lt=&Apache::lonlocal::texthash('st' => 'Save and Edit',
                   1345: 					 'vi' => 'Save and View',
1.427     banghart 1346: 					 'dv' => 'Discard Edits and View',
1.428     banghart 1347: 					 'un' => 'undo',
1.280     www      1348: 					 'ed' => 'Edit');
1.161     albertel 1349:       my $buttons=(<<BUTTONS);
1.274     albertel 1350: $cleanbut
1.428     banghart 1351: <input type="submit" name="discardview" accesskey="d"  value="$lt{'dv'}" />
                   1352: <input type="submit" name="Undo" accesskey="u"  value="$lt{'un'}" /><hr>
1.304     matthew  1353: <input type="submit" name="savethisfile" accesskey="s"  value="$lt{'st'}" />
                   1354: <input type="submit" name="viewmode" accesskey="v" value="$lt{'vi'}" />
1.161     albertel 1355: BUTTONS
1.333     www      1356:       $buttons.=&Apache::lonhtmlcommon::spelllink('xmledit','filecont');
1.78      www      1357:       my $editfooter=(<<ENDFOOTER);
1.321     www      1358: $initialize
1.78      www      1359: <hr />
                   1360: <a name="editsection" />
1.333     www      1361: <form method="post" name="xmledit">
1.240     albertel 1362: $xml_help
1.280     www      1363: <input type="hidden" name="editmode" value="$lt{'ed'}" />
1.170     www      1364: $buttons<br />
1.366     albertel 1365: <textarea style="width:100%" cols="80" rows="44" name="filecont" id="filecont">$filecontents</textarea>
1.170     www      1366: <br />$buttons
1.78      www      1367: <br />
                   1368: </form>
1.254     albertel 1369: $titledisplay
1.321     www      1370: </body>
1.78      www      1371: ENDFOOTER
1.147     albertel 1372: #      $result=~s/(\<body[^\>]*\>)/$1$editheader/is;
1.78      www      1373:       $result=~s/(\<\/body\>)/$editfooter/is;
                   1374:       return $result;
                   1375: }
                   1376: 
1.152     albertel 1377: sub get_target {
1.372     albertel 1378:   my $viewgrades=&Apache::lonnet::allowed('vgr',$env{'request.course.id'});
                   1379:   if ( $env{'request.state'} eq 'published') {
                   1380:     if ( defined($env{'form.grade_target'})
1.152     albertel 1381: 	 && ($viewgrades == 'F' )) {
1.372     albertel 1382:       return ($env{'form.grade_target'});
                   1383:     } elsif (defined($env{'form.grade_target'})) {
                   1384:       if (($env{'form.grade_target'} eq 'web') ||
                   1385: 	  ($env{'form.grade_target'} eq 'tex') ) {
                   1386: 	return $env{'form.grade_target'}
1.153     albertel 1387:       } else {
                   1388: 	return 'web';
                   1389:       }
1.152     albertel 1390:     } else {
                   1391:       return 'web';
                   1392:     }
1.372     albertel 1393:   } elsif ($env{'request.state'} eq 'construct') {
                   1394:     if ( defined($env{'form.grade_target'})) {
                   1395:       return ($env{'form.grade_target'});
1.152     albertel 1396:     } else {
                   1397:       return 'web';
                   1398:     }
                   1399:   } else {
                   1400:     return 'web';
                   1401:   }
                   1402: }
                   1403: 
1.24      sakharuk 1404: sub handler {
1.255     sakharuk 1405:     my $request=shift;
                   1406:     
                   1407:     my $target=&get_target();
                   1408:     
1.372     albertel 1409:     $Apache::lonxml::debug=$env{'user.debug'};
1.255     sakharuk 1410:     
1.364     albertel 1411:     &Apache::loncommon::content_type($request,'text/html');
1.255     sakharuk 1412:     &Apache::loncommon::no_cache($request);
1.372     albertel 1413:     if ($env{'request.state'} eq 'published') {
1.363     albertel 1414: 	$request->set_last_modified(&Apache::lonnet::metadata($request->uri,
                   1415: 							      'lastrevisiondate'));
                   1416:     }
1.255     sakharuk 1417:     $request->send_http_header;
                   1418:     
                   1419:     return OK if $request->header_only;
1.68      www      1420: 
                   1421: 
1.255     sakharuk 1422:     my $file=&Apache::lonnet::filelocation("",$request->uri);
1.274     albertel 1423:     my $filetype;
                   1424:     if ($file =~ /\.sty$/) {
                   1425: 	$filetype='sty';
                   1426:     } else {
                   1427: 	$filetype='html';
                   1428:     }
1.78      www      1429: #
                   1430: # Edit action? Save file.
                   1431: #
1.428     banghart 1432:     if (!($env{'request.state'} eq 'published')) {
                   1433: 	if ($env{'form.savethisfile'} || $env{'form.viewmode'} || $env{'form.Undo'}) {
1.429     albertel 1434: 	    my $html_file=&Apache::lonnet::getfile($file);
                   1435: 	    my $error = &Apache::lonhomework::handle_save_or_undo($request, \$html_file, \$env{'form.filecont'});
1.255     sakharuk 1436: 	}
                   1437:     }
                   1438:     my %mystyle;
                   1439:     my $result = '';
                   1440:     my $filecontents=&Apache::lonnet::getfile($file);
                   1441:     if ($filecontents eq -1) {
1.402     albertel 1442: 	my $start_page=&Apache::loncommon::start_page('File Error');
1.412     albertel 1443: 	my $end_page=&Apache::loncommon::end_page();
1.284     www      1444: 	my $fnf=&mt('File not found');
1.255     sakharuk 1445: 	$result=(<<ENDNOTFOUND);
1.402     albertel 1446: $start_page
1.284     www      1447: <b>$fnf: $file</b>
1.402     albertel 1448: $end_page
1.78      www      1449: ENDNOTFOUND
1.343     albertel 1450:         $filecontents='';
1.372     albertel 1451: 	if ($env{'request.state'} ne 'published') {
1.274     albertel 1452: 	    if ($filetype eq 'sty') {
                   1453: 		$filecontents=&createnewsty();
                   1454: 	    } else {
                   1455: 		$filecontents=&createnewhtml();
                   1456: 	    }
1.372     albertel 1457: 	    $env{'form.editmode'}='Edit'; #force edit mode
1.255     sakharuk 1458: 	}
                   1459:     } else {
1.372     albertel 1460: 	unless ($env{'request.state'} eq 'published') {
1.343     albertel 1461: 	    if ($filecontents=~/BEGIN LON-CAPA Internal/) {
1.381     www      1462: 		&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 1463: 	    }
1.264     www      1464: #
                   1465: # we are in construction space, see if edit mode forced
1.385     albertel 1466:             &Apache::loncommon::get_unprocessed_cgi($ENV{'QUERY_STRING'},
                   1467: 						    ['editmode']);
1.255     sakharuk 1468: 	}
1.427     banghart 1469: 	if (!$env{'form.editmode'} || $env{'form.viewmode'} || $env{'form.discardview'}) {
1.255     sakharuk 1470: 	    $result = &Apache::lonxml::xmlparse($request,$target,$filecontents,
                   1471: 						'',%mystyle);
1.368     albertel 1472: 	    undef($Apache::lonhomework::parsing_a_task);
1.385     albertel 1473: 	    &Apache::loncommon::get_unprocessed_cgi($ENV{'QUERY_STRING'},
                   1474: 						    ['rawmode']);
1.395     albertel 1475: 	    if ($env{'form.rawmode'}) { $result = $filecontents; }
1.255     sakharuk 1476: 	}
1.147     albertel 1477:     }
1.255     sakharuk 1478:     
1.78      www      1479: #
                   1480: # Edit action? Insert editing commands
                   1481: #
1.372     albertel 1482:     unless ($env{'request.state'} eq 'published') {
1.427     banghart 1483: 	if ($env{'form.editmode'} && (!($env{'form.viewmode'})) && (!($env{'form.discardview'})))
                   1484: 	    {
1.255     sakharuk 1485: 	    my $displayfile=$request->uri;
                   1486: 	    $displayfile=~s/^\/[^\/]*//;
1.402     albertel 1487: 	    my %options = ();
                   1488: 	    if ($env{'environment.remote'} ne 'off') {
                   1489: 		$options{'bgcolor'}   = '#FFFFFF';
1.349     albertel 1490: 	    }
1.402     albertel 1491: 	    my $start_page = &Apache::loncommon::start_page(undef,undef,
                   1492: 							    \%options);
                   1493: 	    $result=$start_page.
1.309     albertel 1494: 		&Apache::lonxml::message_location().'<h3>'.
                   1495: 		$displayfile.
1.402     albertel 1496: 		'</h3>'.&Apache::loncommon::end_page();
1.274     albertel 1497: 	    $result=&inserteditinfo($result,$filecontents,$filetype);
1.255     sakharuk 1498: 	}
1.147     albertel 1499:     }
1.402     albertel 1500:     if ($filetype eq 'html') { &writeallows($request->uri); }
1.274     albertel 1501: 	
1.255     sakharuk 1502:     
1.309     albertel 1503:     &Apache::lonxml::add_messages(\$result);
1.255     sakharuk 1504:     $request->print($result);
                   1505:     
                   1506:     return OK;
1.253     albertel 1507: }
                   1508: 
                   1509: sub display_title {
                   1510:     my $result;
1.372     albertel 1511:     if ($env{'request.state'} eq 'construct') {
1.253     albertel 1512: 	my $title=&Apache::lonnet::gettitle();
                   1513: 	if (!defined($title) || $title eq '') {
1.372     albertel 1514: 	    $title = $env{'request.filename'};
1.253     albertel 1515: 	    $title = substr($title, rindex($title, '/') + 1);
                   1516: 	}
                   1517: 	$result = "<script type='text/javascript'>top.document.title = '$title - LON-CAPA Construction Space';</script>";
                   1518:     }
                   1519:     return $result;
1.24      sakharuk 1520: }
1.147     albertel 1521: 
1.22      albertel 1522: sub debug {
1.298     albertel 1523:     if ($Apache::lonxml::debug eq "1") {
                   1524: 	$|=1;
1.300     albertel 1525: 	my $request=$Apache::lonxml::request;
1.388     albertel 1526: 	if (!$request) {
                   1527: 	    eval { $request=Apache->request; };
                   1528: 	}
                   1529: 	if (!$request) {
                   1530: 	    eval { $request=Apache2::RequestUtil->request; };
                   1531: 	}
1.314     albertel 1532: 	$request->print('<font size="-2"><pre>DEBUG:'.&HTML::Entities::encode($_[0],'<>&"')."</pre></font>\n");
1.346     albertel 1533: 	#&Apache::lonnet::logthis($_[0]);
1.298     albertel 1534:     }
1.22      albertel 1535: }
1.49      albertel 1536: 
1.348     albertel 1537: sub show_error_warn_msg {
1.372     albertel 1538:     if ($env{'request.filename'} eq '/home/httpd/html/res/lib/templates/simpleproblem.problem' &&
                   1539: 	&Apache::lonnet::allowed('mdc',$env{'request.course.id'})) {
1.351     albertel 1540: 	return 1;
                   1541:     }
1.348     albertel 1542:     return (($Apache::lonxml::debug eq 1) ||
1.372     albertel 1543: 	    ($env{'request.state'} eq 'construct') ||
1.348     albertel 1544: 	    ($Apache::lonhomework::browse eq 'F'
                   1545: 	     &&
1.372     albertel 1546: 	     $env{'form.show_errors'} eq 'on'));
1.348     albertel 1547: }
                   1548: 
1.22      albertel 1549: sub error {
1.336     albertel 1550:     $errorcount++;
1.348     albertel 1551:     if ( &show_error_warn_msg() ) {
1.336     albertel 1552: 	# If printing in construction space, put the error inside <pre></pre>
                   1553: 	push(@Apache::lonxml::error_messages,
                   1554: 	     $Apache::lonxml::warnings_error_header.
                   1555: 	     "<b>ERROR:</b>".join("<br />\n",@_)."<br />\n");
                   1556: 	$Apache::lonxml::warnings_error_header='';
                   1557:     } else {
                   1558: 	my $errormsg;
                   1559: 	my ($symb)=&Apache::lonnet::symbread();
                   1560: 	if ( !$symb ) {
                   1561: 	    #public or browsers
                   1562: 	    $errormsg=&mt("An error occured while processing this resource. The author has been notified.");
1.403     albertel 1563: 	}
1.413     albertel 1564: 	my $host=$Apache::lonnet::perlvar{'lonHostID'};
1.416     albertel 1565: 	my $msg = join('<br />',(@_,"The error occurred on host <tt>$host</tt>"));
1.336     albertel 1566: 	#notify author
1.403     albertel 1567: 	&Apache::lonmsg::author_res_msg($env{'request.filename'},$msg);
1.336     albertel 1568: 	#notify course
1.372     albertel 1569: 	if ( $symb && $env{'request.course.id'} ) {
1.380     www      1570: 	    my $cnum=$env{'course.'.$env{'request.course.id'}.'.num'};
                   1571: 	    my $cdom=$env{'course.'.$env{'request.course.id'}.'.domain'};
1.336     albertel 1572: 	    my (undef,%users)=&Apache::lonfeedback::decide_receiver(undef,0,1,1,1);
1.372     albertel 1573: 	    my $declutter=&Apache::lonnet::declutter($env{'request.filename'});
1.435     raeburn  1574:             my $baseurl = &Apache::lonnet::clutter($declutter);
1.336     albertel 1575: 	    my @userlist;
                   1576: 	    foreach (keys %users) {
                   1577: 		my ($user,$domain) = split(/:/, $_);
                   1578: 		push(@userlist,"$user\@$domain");
1.380     www      1579: 		my $key=$declutter.'_'.$user.'_'.$domain;
                   1580: 		my %lastnotified=&Apache::lonnet::get('nohist_xmlerrornotifications',
                   1581: 						      [$key],
                   1582: 						      $cdom,$cnum);
                   1583: 		my $now=time;
                   1584: 		if ($now-$lastnotified{$key}>86400) {
1.434     raeburn  1585:                     my $title = &Apache::lonnet::gettitle($symb);
                   1586:                     my $sentmessage;
1.380     www      1587: 		    &Apache::lonmsg::user_normal_msg($user,$domain,
1.435     raeburn  1588: 		        "Error [$title]",$msg,'',$baseurl,'','',
1.434     raeburn  1589:                         \$sentmessage,$symb,$title,1);
1.380     www      1590: 		    &Apache::lonnet::put('nohist_xmlerrornotifications',
                   1591: 					 {$key => $now},
                   1592: 					 $cdom,$cnum);		
                   1593: 		}
1.336     albertel 1594: 	    }
1.372     albertel 1595: 	    if ($env{'request.role.adv'}) {
1.336     albertel 1596: 		$errormsg=&mt("An error occured while processing this resource. The course personnel ([_1]) and the author have been notified.",join(', ',@userlist));
                   1597: 	    } else {
                   1598: 		$errormsg=&mt("An error occured while processing this resource. The instructor has been notified.");
                   1599: 	    }
                   1600: 	}
                   1601: 	push(@Apache::lonxml::error_messages,"<b>$errormsg</b> <br />");
1.52      albertel 1602:     }
1.22      albertel 1603: }
1.49      albertel 1604: 
1.22      albertel 1605: sub warning {
1.295     albertel 1606:     $warningcount++;
1.261     albertel 1607:   
1.372     albertel 1608:     if ($env{'form.grade_target'} ne 'tex') {
1.348     albertel 1609: 	if ( &show_error_warn_msg() ) {
1.309     albertel 1610: 	    push(@Apache::lonxml::warning_messages,
                   1611: 		 $Apache::lonxml::warnings_error_header.
                   1612: 		 "<b>W</b>ARNING<b>:</b>".join('<br />',@_)."<br />\n");
1.295     albertel 1613: 	    $Apache::lonxml::warnings_error_header='';
                   1614: 	}
                   1615:     }
1.309     albertel 1616: }
                   1617: 
                   1618: sub info {
1.372     albertel 1619:     if ($env{'form.grade_target'} ne 'tex' 
                   1620: 	&& $env{'request.state'} eq 'construct') {
1.309     albertel 1621: 	push(@Apache::lonxml::info_messages,join('<br />',@_)."<br />\n");
                   1622:     }
                   1623: }
                   1624: 
                   1625: sub message_location {
                   1626:     return '__LONCAPA_INTERNAL_MESSAGE_LOCATION__';
                   1627: }
                   1628: 
                   1629: sub add_messages {
                   1630:     my ($msg)=@_;
                   1631:     my $result=join(' ',
                   1632: 		    @Apache::lonxml::info_messages,
                   1633: 		    @Apache::lonxml::error_messages,
                   1634: 		    @Apache::lonxml::warning_messages);
                   1635:     undef(@Apache::lonxml::info_messages);
                   1636:     undef(@Apache::lonxml::error_messages);
                   1637:     undef(@Apache::lonxml::warning_messages);
                   1638:     $$msg=~s/__LONCAPA_INTERNAL_MESSAGE_LOCATION__/$result/;
                   1639:     $$msg=~s/__LONCAPA_INTERNAL_MESSAGE_LOCATION__//g;
1.83      albertel 1640: }
                   1641: 
                   1642: sub get_param {
1.213     albertel 1643:     my ($param,$parstack,$safeeval,$context,$case_insensitive) = @_;
                   1644:     if ( ! $context ) { $context = -1; }
                   1645:     my $args ='';
                   1646:     if ( $#$parstack > (-2-$context) ) { $args=$$parstack[$context]; }
1.297     sakharuk 1647:     if ( ! $Apache::lonxml::usestyle ) {
                   1648: 	$args=$Apache::lonxml::style_values.$args;
                   1649:     }
1.213     albertel 1650:     if ( ! $args ) { return undef; }
                   1651:     if ( $case_insensitive ) {
1.417     albertel 1652: 	if ($args =~ s/(my (?:.*))(\$\Q$param\E[,\)])/$1.lc($2)/ei) {
1.213     albertel 1653: 	    return &Apache::run::run("{$args;".'return $'.$param.'}',
                   1654:                                      $safeeval); #'
                   1655: 	} else {
                   1656: 	    return undef;
                   1657: 	}
                   1658:     } else {
1.417     albertel 1659: 	if ( $args =~ /my .*\$\Q$param\E[,\)]/ ) {
1.213     albertel 1660: 	    return &Apache::run::run("{$args;".'return $'.$param.'}',
                   1661:                                      $safeeval); #'
                   1662: 	} else {
                   1663: 	    return undef;
                   1664: 	}
                   1665:     }
1.22      albertel 1666: }
                   1667: 
1.132     albertel 1668: sub get_param_var {
1.213     albertel 1669:   my ($param,$parstack,$safeeval,$context,$case_insensitive) = @_;
1.132     albertel 1670:   if ( ! $context ) { $context = -1; }
                   1671:   my $args ='';
                   1672:   if ( $#$parstack > (-2-$context) ) { $args=$$parstack[$context]; }
1.297     sakharuk 1673:   if ( ! $Apache::lonxml::usestyle ) {
                   1674:       $args=$Apache::lonxml::style_values.$args;
                   1675:   }
1.230     albertel 1676:   &Apache::lonxml::debug("Args are $args param is $param");
1.213     albertel 1677:   if ($case_insensitive) {
1.419     albertel 1678:       if (! ($args=~s/(my (?:.*))(\$\Q$param\E[,\)])/$1.lc($2)/ei)) {
1.213     albertel 1679: 	  return undef;
                   1680:       }
1.419     albertel 1681:   } elsif ( $args !~ /my .*\$\Q$param\E[,\)]/ ) { return undef; }
1.132     albertel 1682:   my $value=&Apache::run::run("{$args;".'return $'.$param.'}',$safeeval); #'
1.230     albertel 1683:   &Apache::lonxml::debug("first run is $value");
1.341     albertel 1684:   if ($value =~ /^[\$\@\%][a-zA-Z_]\w*$/) {
1.230     albertel 1685:       &Apache::lonxml::debug("doing second");
                   1686:       my @result=&Apache::run::run("return $value",$safeeval,1);
                   1687:       if (!defined($result[0])) {
                   1688: 	  return $value
                   1689:       } else {
                   1690: 	  if (wantarray) { return @result; } else { return $result[0]; }
                   1691:       }
1.132     albertel 1692:   } else {
                   1693:     return $value;
                   1694:   }
                   1695: }
                   1696: 
1.74      albertel 1697: sub register_insert {
1.75      albertel 1698:   my @data = split /\n/, &Apache::lonnet::getfile('/home/httpd/lonTabs/insertlist.tab');
1.74      albertel 1699:   my $i;
1.76      albertel 1700:   my $tagnum=0;
1.74      albertel 1701:   my @order;
                   1702:   for ($i=0;$i < $#data; $i++) {
                   1703:     my $line = $data[$i];
                   1704:     if ( $line =~ /^\#/ || $line =~ /^\s*\n/) { next; }
                   1705:     if ( $line =~ /TABLE/ ) { last; }
1.268     bowersj2 1706:     my ($tag,$descrip,$color,$function,$show,$helpfile,$helpdesc) = split(/,/, $line);
1.135     albertel 1707:     if ($tag) {
                   1708:       $insertlist{"$tagnum.tag"} = $tag;
1.437   ! albertel 1709:       $insertlist{"$tag.description"} = $descrip;
        !          1710:       $insertlist{"$tag.color"} = $color;
        !          1711:       $insertlist{"$tag.function"} = $function;
1.135     albertel 1712:       if (!defined($show)) { $show='yes'; }
1.437   ! albertel 1713:       $insertlist{"$tag.show"}= $show;
        !          1714:       $insertlist{"$tag.helpfile"} = $helpfile;
        !          1715:       $insertlist{"$tag.helpdesc"} = $helpdesc;
1.135     albertel 1716:       $insertlist{"$tag.num"}=$tagnum;
                   1717:       $tagnum++;
                   1718:     }
1.74      albertel 1719:   }
1.76      albertel 1720:   $i++; #skipping TABLE line
                   1721:   $tagnum = 0;
1.74      albertel 1722:   for (;$i < $#data;$i++) {
                   1723:     my $line = $data[$i];
1.76      albertel 1724:     my ($mnemonic,@which) = split(/ +/,$line);
                   1725:     my $tag = $insertlist{"$tagnum.tag"};
1.144     matthew  1726:     for (my $j=0;$j <=$#which;$j++) {
1.74      albertel 1727:       if ( $which[$j] eq 'Y' ) {
1.76      albertel 1728: 	if ($insertlist{"$j.show"} ne 'no') {
1.437   ! albertel 1729: 	  push(@{ $insertlist{"$tag.which"} },$insertlist{"$j.tag"});
1.76      albertel 1730: 	}
1.74      albertel 1731:       }
                   1732:     }
1.76      albertel 1733:     $tagnum++;
1.74      albertel 1734:   }
                   1735: }
1.98      albertel 1736: 
                   1737: sub description {
1.437   ! albertel 1738:     my ($token)=@_;
        !          1739:     my $tag = &get_tag($token);
        !          1740:     return $insertlist{$tag.'.description'};
1.268     bowersj2 1741: }
                   1742: 
                   1743: # Returns a list containing the help file, and the description
                   1744: sub helpinfo {
1.437   ! albertel 1745:     my ($token)=@_;
        !          1746:     my $tag = &get_tag($token);
        !          1747:     return ($insertlist{$tag.'.helpfile'}, $insertlist{$tag.'.helpdesc'});
        !          1748: }
        !          1749: 
        !          1750: sub get_tag {
        !          1751:     my ($token)=@_;
        !          1752:     my $tagnum;
        !          1753:     my $tag=$token->[1];
        !          1754:     foreach my $namespace (reverse(@Apache::lonxml::namespace)) {
        !          1755: 	my $testtag = $namespace.'::'.$tag;
        !          1756: 	$tagnum = $insertlist{"$testtag.num"};
        !          1757: 	last if (defined($tagnum));
        !          1758:     }
        !          1759:     if (!defined($tagnum)) {
        !          1760: 	$tagnum = $Apache::lonxml::insertlist{"$tag.num"};
        !          1761:     }
        !          1762:     return $insertlist{"$tagnum.tag"};
1.98      albertel 1763: }
1.123     albertel 1764: 
1.1       sakharuk 1765: 1;
                   1766: __END__
1.68      www      1767: 
                   1768: 

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