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For the exam 1. correctly adjust the size of bubbles to the text width;
2. use correct enumeration through the environment variable;

    1: # The LearningOnline Network with CAPA
    2: # mutliple choice style responses
    3: #
    4: # $Id: radiobuttonresponse.pm,v 1.56 2002/10/17 14:40:23 sakharuk Exp $
    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: # 2/21 Guy
   29: 
   30: package Apache::radiobuttonresponse;
   31: use strict;
   32: use HTML::Entities();
   33: 
   34: BEGIN {
   35:   &Apache::lonxml::register('Apache::radiobuttonresponse',('radiobuttonresponse'));
   36: }
   37: 
   38: sub start_radiobuttonresponse {
   39:   my ($target,$token,$tagstack,$parstack,$parser,$safeeval,$style)=@_;
   40:   my $result;
   41:   #when in a radiobutton response use these
   42:   &Apache::lonxml::register('Apache::radiobuttonresponse',('foilgroup','foil','conceptgroup'));
   43:   push (@Apache::lonxml::namespace,'radiobuttonresponse');
   44:   my $id = &Apache::response::start_response($parstack,$safeeval);
   45:   if ($target eq 'meta') {
   46:     $result=&Apache::response::meta_package_write('radiobuttonresponse');
   47:   } elsif ($target eq 'edit' ) {
   48:     $result.=&Apache::edit::start_table($token).
   49: 	'<tr><td>'.&Apache::lonxml::description($token)."</td><td>Delete:".
   50: 	&Apache::edit::deletelist($target,$token)
   51: 	."</td><td>&nbsp".&Apache::edit::end_row()
   52:         .&Apache::edit::start_spanning_row();
   53: 
   54:     $result.=
   55: 	&Apache::edit::text_arg('Max Number Of Shown Foils:','max',$token,'4').
   56: 	&Apache::edit::select_arg('Randomize Foil Order','randomize',
   57: 				  ['yes','no'],$token).
   58:         &Apache::edit::end_row().&Apache::edit::start_spanning_row()."\n";
   59:   } elsif ($target eq 'modified') {
   60:     my $constructtag=&Apache::edit::get_new_args($token,$parstack,
   61: 						 $safeeval,'max','randomize');
   62:     if ($constructtag) { $result = &Apache::edit::rebuild_tag($token); }
   63:   } elsif ($target eq 'tex') {
   64:       $result .= '\begin{enumerate}';
   65:   }
   66:   return $result;
   67: }
   68: 
   69: sub end_radiobuttonresponse {
   70:   my ($target,$token,$tagstack,$parstack,$parser,$safeeval,$style)=@_;
   71:   my $result;
   72:   if ($target eq 'edit') { $result=&Apache::edit::end_table(); }
   73:   if ($target eq 'tex') { $result .= '\end{enumerate}'; }
   74:   &Apache::response::end_response;
   75:   pop @Apache::lonxml::namespace;
   76:   &Apache::lonxml::deregister('Apache::radiobuttonresponse',('foilgroup','foil','conceptgroup'));
   77:   return $result;
   78: }
   79: 
   80: %Apache::response::foilgroup=();
   81: sub start_foilgroup {
   82:   my ($target,$token,$tagstack,$parstack,$parser,$safeeval,$style)=@_;
   83:   my $result;
   84:   %Apache::response::foilgroup=();
   85:   $Apache::radiobuttonresponse::conceptgroup=0;
   86:   &Apache::response::setrandomnumber();
   87:   if ($target eq 'tex' && $Apache::lonhomework::type eq 'exam') {
   88:       $result.='\item[\textbf{'.$Apache::lonxml::counter.'}.]';
   89:       $Apache::lonxml::counter++;
   90:       my %moreenv;
   91:       $moreenv{'form.counter'}=$Apache::lonxml::counter;
   92:       &Apache::lonnet::appenv(%moreenv);
   93:   }
   94:   return $result;
   95: }
   96: 
   97: sub storesurvey {
   98:   if ( !defined($ENV{'form.submitted'})) { return ''; }
   99:   my $response = $ENV{'form.HWVAL'.$Apache::inputtags::response['-1']};
  100:   &Apache::lonxml::debug("Here I am!:$response:");
  101:   if ( $response !~ /[0-9]+/) { return ''; }
  102:   my $id = $Apache::inputtags::response['-1'];
  103:   my @whichfoils=@{ $Apache::response::foilgroup{'names'} };
  104:   my %responsehash;
  105:   $responsehash{$whichfoils[$response]}=$response;
  106:   $Apache::lonhomework::results{"resource.$Apache::inputtags::part.$id.submission"}=&Apache::lonnet::hash2str(%responsehash);
  107:   $Apache::lonhomework::results{"resource.$Apache::inputtags::part.$id.awarddetail"}='SUBMITTED';
  108:   &Apache::lonxml::debug("submitted a $response<br />\n");
  109:   return '';
  110: }
  111: 
  112: sub grade_response {
  113:   my ($max,$randomize)=@_;
  114:   #keep the random numbers the same must always call this
  115:   my ($answer,@whichfoils)=&whichfoils($max,$randomize);
  116:   if (!defined($ENV{'form.submitted'})) { return; }
  117:   my $response = $ENV{'form.HWVAL'.$Apache::inputtags::response['-1']};
  118:   if ( $response !~ /[0-9]+/) { return; }
  119:   my $part=$Apache::inputtags::part;
  120:   my $id = $Apache::inputtags::response['-1'];
  121:   my %responsehash;
  122:   $responsehash{$whichfoils[$response]}=$response;
  123:   my $responsestr=&Apache::lonnet::hash2str(%responsehash);
  124:   my %previous=&Apache::response::check_for_previous($responsestr,
  125: 						     $part,$id);
  126:   $Apache::lonhomework::results{"resource.$part.$id.submission"}=
  127:     $responsestr;
  128:   &Apache::lonxml::debug("submitted a $response<br />\n");
  129:   my $ad;
  130:   if ($response == $answer) {
  131:     $ad='EXACT_ANS';
  132:   } else {
  133:     $ad='INCORRECT';
  134:   }
  135:   $Apache::lonhomework::results{"resource.$part.$id.awarddetail"}=$ad;
  136:   &Apache::response::handle_previous(\%previous,$ad);
  137: }
  138: 
  139: sub end_foilgroup {
  140:   my ($target,$token,$tagstack,$parstack,$parser,$safeeval,$style)=@_;
  141: 
  142:   my $result;
  143:   if ($target eq 'grade' || $target eq 'web' || $target eq 'answer' || $target eq 'tex') {
  144:     my $style = $Apache::lonhomework::type;
  145:     if ( $style eq 'survey' ) {
  146:       if ($target eq 'web' || $target eq 'answer' || $target eq 'tex') {
  147: 	$result=&displayallfoils();
  148:       } elsif ( $target eq 'grade' ) {
  149: 	$result=&storesurvey();
  150:       }
  151:     } else {
  152:       my $name;
  153:       my $max = &Apache::lonxml::get_param('max',$parstack,$safeeval,'-2');
  154:       my $randomize = &Apache::lonxml::get_param('randomize',$parstack,
  155: 						 $safeeval,'-2');
  156:       if ($target eq 'web' || $target eq 'tex') {
  157: 	$result=&displayfoils($target,$max,$randomize);
  158:       } elsif ($target eq 'answer' ) {
  159: 	$result=&displayanswers($max,$randomize);
  160:       } elsif ( $target eq 'grade') {
  161: 	&grade_response($max,$randomize);
  162:       }
  163:     }
  164:   }
  165:   return $result;
  166: }
  167: 
  168: sub getfoilcounts {
  169:   my @names;
  170:   my $truecnt=0;
  171:   my $falsecnt=0;
  172:   my $name;
  173:   if ( $Apache::response::foilgroup{'names'} ) {
  174:     @names= @{ $Apache::response::foilgroup{'names'} };
  175:   }
  176:   foreach $name (@names) {
  177:     if ($Apache::response::foilgroup{$name.'.value'} eq 'true') {
  178:       $truecnt++;
  179:     } elsif ($Apache::response::foilgroup{$name.'.value'} eq 'false') {
  180:       $falsecnt++;
  181:     }
  182:   }
  183:   return ($truecnt,$falsecnt);
  184: }
  185: 
  186: sub displayallfoils {
  187:   my $result;
  188:   &Apache::lonxml::debug("survey style display");
  189:   my @names = @{ $Apache::response::foilgroup{'names'} };
  190:   my $temp=0;
  191:   my $id=$Apache::inputtags::response['-1'];
  192:   my $part=$Apache::inputtags::part;
  193:   my $lastresponse=$Apache::lonhomework::history{"resource.$part.$id.submission"};
  194:   my %lastresponse=&Apache::lonnet::str2hash($lastresponse);
  195:   if (($Apache::lonhomework::history{"resource.$part.solved"} =~ /^correct/)  || ($Apache::inputtags::status[-1] eq  'SHOW_ANSWER')) {
  196:     foreach my $name (@names) {
  197:       if ($Apache::response::foilgroup{$name.'.value'} ne 'unused') {
  198: 	$result.="<br />".$Apache::response::foilgroup{$name.'.value'};
  199: 	if ($Apache::response::foilgroup{$name.'.value'} eq 'true') {
  200: 	  $result.='<b>';
  201: 	}
  202: 	$result .= $Apache::response::foilgroup{$name.'.text'};
  203: 	if ($Apache::response::foilgroup{$name.'.value'} eq 'true') {
  204: 	  $result.='</b>';
  205: 	}
  206:       }
  207:     }
  208:   } else {
  209:     foreach my $name (@names) {
  210:       if ($Apache::response::foilgroup{$name.'.value'} ne 'unused') {
  211: 	$result.="<br /><input type=\"radio\" name=\"HWVAL$Apache::inputtags::response['-1']\" value=\"$temp\" ";
  212: 	if (defined($lastresponse{$name})) { $result .= 'checked="on"'; }
  213: 	$result .= '>'.$Apache::response::foilgroup{$name.'.text'}."</input>\n";
  214: 	$temp++;
  215:       }
  216:     }
  217:   }
  218:   return $result;
  219: }
  220: 
  221: sub whichfoils {
  222:   my ($max,$randomize)=@_;
  223: 
  224:   my @truelist;
  225:   my @falselist;
  226:   my @whichfalse =();
  227:   my ($truecnt,$falsecnt) = &getfoilcounts();
  228:   my $count=0;
  229:   # we will add in 1 of the true statements
  230:   if (($falsecnt+1)>$max) { $count=$max } else { $count=$falsecnt+1; }
  231:   my $answer=int(&Math::Random::random_uniform() * ($count));
  232:   &Apache::lonxml::debug("Count is $count, $answer is $answer");
  233:   my @names;
  234:   if ( $Apache::response::foilgroup{'names'} ) {
  235:       @names= @{ $Apache::response::foilgroup{'names'} };
  236:   }
  237:   if (&Apache::response::showallfoils()) {
  238:       @whichfalse=@names;
  239:   } elsif ($randomize eq 'no') {
  240:       &Apache::lonxml::debug("No randomization");
  241:       my $havetrue=0;
  242:       foreach my $name (@names) {
  243: 	  if ($Apache::response::foilgroup{$name.'.value'} eq 'true') {
  244: 	      if (!$havetrue ) {
  245: 		  push(@whichfalse,$name); $havetrue++; $answer=$#whichfalse;
  246: 	      }
  247: 	  } elsif ($Apache::response::foilgroup{$name.'.value'} eq 'false') {
  248: 	      push (@whichfalse,$name);
  249: 	  } elsif ($Apache::response::foilgroup{$name.'.value'} eq 'unused') {
  250: 	  } else {
  251: 	      &Apache::lonxml::error(&HTML::Entities::encode("No valid value assigned ($Apache::response::foilgroup{$name.'.value'}) for foil $name in <foilgroup>"));
  252: 	  }
  253:       }
  254:   } else {
  255:     my $current=0;
  256:     &Apache::lonhomework::showhash(%Apache::response::foilgroup);
  257:     my (%top,%bottom);
  258:     #first find out where everyone wants to be
  259:     foreach my $name (@names) {
  260: 	$current++;
  261: 	if ($Apache::response::foilgroup{$name.'.value'} eq 'true') {
  262: 	    push (@truelist,$name);
  263: 	    if ($Apache::response::foilgroup{$name.'.location'} eq 'top') {
  264: 		$top{$name}=$current;
  265: 	    } elsif ($Apache::response::foilgroup{$name.'.location'} eq 'bottom') {
  266: 		$bottom{$name}=$current;
  267: 	    }
  268: 	} elsif ($Apache::response::foilgroup{$name.'.value'} eq 'false') {
  269: 	    push (@falselist,$name);
  270: 	    if ($Apache::response::foilgroup{$name.'.location'} eq 'top') {
  271: 		$top{$name}=$current;
  272: 	    } elsif ($Apache::response::foilgroup{$name.'.location'} eq 'bottom') {
  273: 		$bottom{$name}=$current;
  274: 	    }
  275: 	} elsif ($Apache::response::foilgroup{$name.'.value'} eq 'unused') {
  276: 	} else {
  277: 	    &Apache::lonxml::error(&HTML::Entities::encode("No valid value assigned ($Apache::response::foilgroup{$name.'.value'}) for foil $name in <foilgroup>"));
  278: 	}
  279:     }
  280:     #pick a true statement
  281:     my $whichtrue = int(&Math::Random::random_uniform() * ($#truelist+1));
  282:     &Apache::lonxml::debug("Max is $max, From $#truelist elms, picking $whichtrue");
  283:     my $numinserted;
  284:     my (@toplist, @bottomlist);
  285:     my $topcount=0;
  286:     # assign everyone to either toplist/bottomlist or whichfalse
  287:     # which false is randomized, toplist bottomlist are in order
  288:     while ((($numinserted) < $max-1) && ($#falselist > -1)) {
  289: 	&Apache::lonxml::debug("Have $#whichfalse max is $max");
  290: 	my $afalse=int(&Math::Random::random_uniform() * ($#falselist+1));
  291: 	&Apache::lonxml::debug("From $#falselist elms, picking $afalse");
  292: 	$afalse=splice(@falselist,$afalse,1);
  293: 	&Apache::lonxml::debug("Picked $afalse");
  294: 	&Apache::lonhomework::showhash(('names'=>\@names));
  295: 	&Apache::lonhomework::showhash(%top);
  296: 	if ($top{$afalse}) {
  297: 	    $toplist[$top{$afalse}]=$afalse;
  298: 	    $topcount++;
  299: 	} elsif ($bottom{$afalse}) {
  300: 	    $bottomlist[$bottom{$afalse}]=$afalse;
  301: 	} else {
  302: 	    push (@whichfalse,$afalse);
  303: 	}
  304:     }
  305:     my $truename=$truelist[$whichtrue];
  306:     my $dosplice=1;
  307:     #insert the true statement, keeping track of where it wants to be
  308:     if ($Apache::response::foilgroup{$truename.'.location'} eq 'top' ) {
  309: 	$toplist[$top{$truename}]=$truename;
  310: 	$answer=-1;
  311: 	foreach my $top (reverse(@toplist)) {
  312: 	    if ($top) { $answer++;}
  313: 	    if ($top eq $truename) { last; }
  314: 	}
  315: 	$dosplice=0;
  316:     } elsif ($Apache::response::foilgroup{$truename.'.location'} eq 'bottom') {
  317: 	$bottomlist[$bottom{$truename}]=$truename;
  318: 	$answer=-1;
  319: 	foreach my $bot (@bottomlist) {
  320: 	    if ($bot) { $answer++;}
  321: 	    if ($bot eq $truename) { last; }
  322: 	}
  323: 	$answer+=$topcount+$#whichfalse+1;
  324: 	$dosplice=0;
  325:     } else {
  326: 	if ($topcount>0) { 
  327: 	  $answer = int(&Math::Random::random_uniform() * ($#whichfalse+1))
  328: 	    + $topcount;
  329: 	}
  330:     }
  331:     #add the top items to the top, bottom items to the bottom
  332:     for (my $i=0;$i<=$#toplist;$i++) {
  333: 	if ($toplist[$i]) { unshift(@whichfalse,$toplist[$i]) }
  334:     }
  335:     for (my $i=0;$i<=$#bottomlist;$i++) {
  336: 	if ($bottomlist[$i]) { push(@whichfalse,$bottomlist[$i]) }
  337:     }
  338:     #if the true statement is randomized insert it into the list
  339:     if ($dosplice) { splice(@whichfalse,$answer,0,$truelist[$whichtrue]); }
  340:   }
  341:   &Apache::lonxml::debug("Answer is $answer");
  342:   return ($answer,@whichfalse);
  343: }
  344: 
  345: sub displayfoils {
  346:   my ($target,$max,$randomize)=@_;
  347:   my $result;
  348: 
  349:   my ($answer,@whichfoils)=&whichfoils($max,$randomize);
  350:   if ($Apache::lonhomework::history{"resource.$Apache::inputtags::part.solved"} =~ /^correct/ || ($Apache::inputtags::status[-1] eq  'SHOW_ANSWER')) {
  351:     foreach my $name (@whichfoils) {
  352:       if ($target ne 'tex') {
  353: 	  $result.="<br />";
  354:       } else {
  355: 	  $result.='\vskip 0 mm \item ';
  356:       }
  357:       if ($Apache::response::foilgroup{$name.'.value'} eq 'true') { 
  358: 	  if ($target ne 'tex') { $result.='Correct:<b>'; } else { $result.='Correct: ';}
  359:       } else {
  360: 	$result.='Incorrect:';
  361:       }
  362:       if ($target ne 'tex') {
  363: 	  $result.=$Apache::response::foilgroup{$name.'.text'}."</input>\n";
  364:       } else {
  365: 	  $result.=$Apache::response::foilgroup{$name.'.text'};
  366:       }
  367:       if ($Apache::response::foilgroup{$name.'.value'} eq 'true') {
  368: 	  if ($target ne 'tex') { $result.='</b>';}
  369:       }
  370:     }
  371:   } else {
  372:     my @alphabet = ('A','B','C','D','E','F','G','H','I','J','K','L','M','N','O','P','Q','R','S','T','U','V','W','X','Y','Z');
  373:     my $i = 0;
  374:     my $temp=0;  
  375:     my $id=$Apache::inputtags::response['-1'];
  376:     my $part=$Apache::inputtags::part;
  377:     my $lastresponse=$Apache::lonhomework::history{"resource.$part.$id.submission"};
  378:     my %lastresponse=&Apache::lonnet::str2hash($lastresponse);
  379:     foreach my $name (@whichfoils) {
  380:       if ($target ne 'tex') {
  381: 	  $result.="<br /><input type=\"radio\" name=\"HWVAL$Apache::inputtags::response['-1']\" value=\"$temp\" ";
  382: 	  if (defined($lastresponse{$name})) { $result .= 'checked="on"'; }
  383: 	  $result .= '>'.$Apache::response::foilgroup{$name.'.text'}."</input>\n";
  384: 	  if ($Apache::lonhomework::type eq 'exam') {
  385: 	      $result .= '<table border="1"><tr><td>A: &nbsp;&nbsp;Correct</td><td>B: &nbsp;&nbsp;Incorrect</td></tr></table>';
  386: 	  }
  387:       } else {
  388: 	  if ($Apache::lonhomework::type eq 'exam') {
  389: 	      $result .= '{\small \textbf{'.$alphabet[$i].'}}$\bigcirc$'.$Apache::response::foilgroup{$name.'.text'}.'\\\\';
  390: 	      $i++;
  391: 	  } else {
  392: 	      $result .= '\item '.$Apache::response::foilgroup{$name.'.text'};
  393: 	  }
  394:       }
  395:       $temp++;
  396:     }
  397:   }
  398:   if ($target ne 'tex') { $result.="<br />"; } else { $result.='\vskip 0 mm '; }
  399:   return $result;
  400: }
  401: 
  402: sub displayanswers {
  403:   my ($max,$randomize)=@_;
  404:   my ($answer,@whichopt) = &whichfoils($max,$randomize);
  405:   my $result=&Apache::response::answer_header('radiobuttonresponse');
  406:   foreach my $name (@whichopt) {
  407:     $result.=&Apache::response::answer_part('radiobuttonresponse',
  408: 		     $Apache::response::foilgroup{$name.'.value'})
  409:   }
  410:   $result.=&Apache::response::answer_footer('radiobuttonresponse');
  411:   return $result;
  412: }
  413: 
  414: sub start_conceptgroup {
  415:   my ($target,$token,$tagstack,$parstack,$parser,$safeeval,$style)=@_;
  416:   $Apache::radiobuttonresponse::conceptgroup=1;
  417:   %Apache::response::conceptgroup=();
  418:   my $result;
  419:   if ($target eq 'edit') {
  420:     $result.=&Apache::edit::tag_start($target,$token);
  421:     $result.=&Apache::edit::text_arg('Concept:','concept',$token,'50').
  422: 	&Apache::edit::end_row().&Apache::edit::start_spanning_row();
  423:   } elsif ($target eq 'modified') {
  424:     my $constructtag=&Apache::edit::get_new_args($token,$parstack,
  425: 						 $safeeval,'concept');
  426:     if ($constructtag) { $result = &Apache::edit::rebuild_tag($token); }
  427:   }
  428:   return $result;
  429: }
  430: 
  431: sub end_conceptgroup {
  432:   my ($target,$token,$tagstack,$parstack,$parser,$safeeval,$style)=@_;
  433:   $Apache::radiobuttonresponse::conceptgroup=0;
  434:   my $result;
  435:   if ($target eq 'web' || $target eq 'grade' || $target eq 'answer'  || $target eq 'tex') {
  436:     if (defined(@{ $Apache::response::conceptgroup{'names'} })) {
  437:       my @names = @{ $Apache::response::conceptgroup{'names'} };
  438:       my $pick=int(&Math::Random::random_uniform() * ($#names+1));
  439:       my $name=$names[$pick];
  440:       push @{ $Apache::response::foilgroup{'names'} }, $name;
  441:       $Apache::response::foilgroup{"$name.text"} =  $Apache::response::conceptgroup{"$name.text"};
  442:       $Apache::response::foilgroup{"$name.value"} = $Apache::response::conceptgroup{"$name.value"};
  443:       $Apache::response::foilgroup{"$name.location"} = $Apache::response::conceptgroup{"$name.location"};
  444:       my $concept = &Apache::lonxml::get_param('concept',$parstack,$safeeval);
  445:       $Apache::response::foilgroup{"$name.concept"} = $concept;
  446:       &Apache::lonxml::debug("Selecting $name in $concept");
  447:     }
  448:   } elsif ($target eq 'edit') {
  449:     $result=&Apache::edit::end_table();
  450:   }
  451:   return $result;
  452: }
  453: 
  454: sub insert_conceptgroup {
  455:   my $result="\n\t\t<conceptgroup concept=\"\">".&insert_foil()."\n\t\t</conceptgroup>\n";
  456:   return $result;
  457: }
  458: 
  459: sub start_foil {
  460:   my ($target,$token,$tagstack,$parstack,$parser,$safeeval,$style)=@_;
  461:   my $result='';
  462:   if ($target eq 'web' || $target eq 'tex') {
  463:     &Apache::lonxml::startredirection;
  464:   } elsif ($target eq 'edit') {
  465:     $result=&Apache::edit::tag_start($target,$token);
  466:     $result.=&Apache::edit::text_arg('Name:','name',$token);
  467:     $result.=&Apache::edit::select_or_text_arg('Correct Option:','value',
  468: 				       ['unused','true','false'],$token);
  469:     my $randomize=&Apache::lonxml::get_param('randomize',$parstack,
  470: 					     $safeeval,'-3');
  471:     if ($randomize ne 'no') {
  472:       $result.=&Apache::edit::select_arg('Location:','location',
  473: 					 ['random','top','bottom'],$token);
  474:     }
  475:     $result.=&Apache::edit::end_row().&Apache::edit::start_spanning_row();
  476:   } elsif ($target eq 'modified') {
  477:      my $constructtag=&Apache::edit::get_new_args($token,$parstack,$safeeval,
  478: 						  'value','name','location');
  479:     if ($constructtag) { $result = &Apache::edit::rebuild_tag($token); }
  480:   } 
  481:   return $result;
  482: }
  483: 
  484: sub end_foil {
  485:   my ($target,$token,$tagstack,$parstack,$parser,$safeeval,$style)=@_;
  486:   my $text='';
  487:   if ($target eq 'web' || $target eq 'tex') { $text=&Apache::lonxml::endredirection; }
  488:   if ($target eq 'web' || $target eq 'grade' || $target eq 'answer'  || $target eq 'tex') {
  489:     my $value = &Apache::lonxml::get_param('value',$parstack,$safeeval);
  490:     if ($value ne 'unused') {
  491:       my $name = &Apache::lonxml::get_param('name',$parstack,$safeeval);
  492:       my $location =&Apache::lonxml::get_param('location',$parstack,$safeeval);
  493:       if (!$name) { $name=$Apache::lonxml::curdepth; }
  494:       if ( $Apache::radiobuttonresponse::conceptgroup
  495: 	   && !&Apache::response::showallfoils() ) {
  496: 	push @{ $Apache::response::conceptgroup{'names'} }, $name;
  497: 	$Apache::response::conceptgroup{"$name.value"} = $value;
  498: 	$Apache::response::conceptgroup{"$name.text"} = $text;	
  499: 	$Apache::response::conceptgroup{"$name.location"} = $location;	
  500:       } else {
  501: 	push @{ $Apache::response::foilgroup{'names'} }, $name;
  502: 	$Apache::response::foilgroup{"$name.value"} = $value;
  503: 	$Apache::response::foilgroup{"$name.text"} = $text;
  504: 	$Apache::response::foilgroup{"$name.location"} = $location;
  505:       }
  506:     }
  507:   }
  508:   return '';
  509: }
  510: 
  511: sub insert_foil {
  512:   return '
  513: <foil name="" value="unused">
  514: <startouttext />
  515: <endouttext />
  516: </foil>';
  517: }
  518: 1;
  519: __END__
  520: