Annotation of loncom/homework/rankresponse.pm, revision 1.55

1.1       albertel    1: # The LearningOnline Network with CAPA
                      2: # rank style response
                      3: #
1.55    ! foxr        4: # $Id: rankresponse.pm,v 1.54 2007/10/08 09:22:50 foxr Exp $
1.1       albertel    5: # Copyright Michigan State University Board of Trustees
                      6: #
                      7: # This file is part of the LearningOnline Network with CAPA (LON-CAPA).
                      8: #
                      9: # LON-CAPA is free software; you can redistribute it and/or modify
                     10: # it under the terms of the GNU General Public License as published by
                     11: # the Free Software Foundation; either version 2 of the License, or
                     12: # (at your option) any later version.
                     13: #
                     14: # LON-CAPA is distributed in the hope that it will be useful,
                     15: # but WITHOUT ANY WARRANTY; without even the implied warranty of
                     16: # MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
                     17: # GNU General Public License for more details.
                     18: #
                     19: # You should have received a copy of the GNU General Public License
                     20: # along with LON-CAPA; if not, write to the Free Software
                     21: # Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA  02111-1307  USA
                     22: #
                     23: # /home/httpd/html/adm/gpl.txt
                     24: #
                     25: # http://www.lon-capa.org/
                     26: #
                     27: 
                     28: package Apache::rankresponse;
                     29: use strict;
                     30: use HTML::Entities();
1.30      albertel   31: use Apache::optionresponse();
                     32: use Apache::lonlocal;
1.1       albertel   33: 
                     34: BEGIN {
                     35:     &Apache::lonxml::register('Apache::rankresponse',('rankresponse'));
                     36: }
                     37: 
                     38: sub start_rankresponse {
                     39:     my ($target,$token,$tagstack,$parstack,$parser,$safeeval,$style)=@_;
                     40:     my $result;
                     41:     #when in a rank response use these
                     42:     &Apache::lonxml::register('Apache::rankresponse',
                     43: 			      ('foilgroup','foil','conceptgroup'));
                     44:     push (@Apache::lonxml::namespace,'rankresponse');
                     45:     my $id = &Apache::response::start_response($parstack,$safeeval);
                     46:     %Apache::hint::rank=();
1.30      albertel   47:     undef(%Apache::response::foilnames);
1.1       albertel   48:     if ($target eq 'meta') {
                     49: 	$result=&Apache::response::meta_package_write('rankresponse');
                     50:     } elsif ($target eq 'edit' ) {
                     51: 	$result.=&Apache::edit::start_table($token).
                     52: 	    '<tr><td>'.&Apache::lonxml::description($token)."</td><td>Delete:".
                     53: 	    &Apache::edit::deletelist($target,$token)
                     54: 	    ."</td><td>&nbsp".&Apache::edit::end_row()
                     55: 	    .&Apache::edit::start_spanning_row();
                     56: 	
                     57: 	$result.=
                     58: 	    &Apache::edit::text_arg('Max Number Of Shown Foils:','max',$token,'4').
                     59: 	    &Apache::edit::select_arg('Randomize Foil Order','randomize',
                     60: 				      ['yes','no'],$token).
                     61: 	    &Apache::edit::end_row().&Apache::edit::start_spanning_row()."\n";
                     62:     } elsif ($target eq 'modified') {
                     63: 	my $constructtag=&Apache::edit::get_new_args($token,$parstack,
                     64: 						     $safeeval,'max',
                     65: 						     'randomize');
                     66: 	if ($constructtag) { $result = &Apache::edit::rebuild_tag($token); }
1.25      albertel   67:     } elsif ($target eq 'analyze') {
                     68: 	my $part_id="$Apache::inputtags::part.$id";
                     69: 	push (@{ $Apache::lonhomework::analyze{"parts"} },$part_id);
1.53      foxr       70: 	push (@{ $Apache::lonhomework::analyze{"$part_id.bubble_lines"} }, 1);
                     71: 
1.1       albertel   72:     }
                     73:     return $result;
                     74: }
                     75: 
                     76: sub end_rankresponse {
                     77:     my ($target,$token,$tagstack,$parstack,$parser,$safeeval,$style)=@_;
                     78:     my $result;
                     79:     if ($target eq 'edit') { $result=&Apache::edit::end_table(); }
                     80:     &Apache::response::end_response;
                     81:     pop @Apache::lonxml::namespace;
                     82:     &Apache::lonxml::deregister('Apache::rankresponse',
                     83: 				('foilgroup','foil','conceptgroup'));
1.30      albertel   84:     undef(%Apache::response::foilnames);
1.1       albertel   85:     return $result;
                     86: }
                     87: 
                     88: %Apache::response::foilgroup=();
                     89: sub start_foilgroup {
                     90:     my ($target,$token,$tagstack,$parstack,$parser,$safeeval,$style)=@_;
                     91:     my $result;
                     92:     %Apache::response::foilgroup=();
                     93:     $Apache::rankresponse::conceptgroup=0;
1.34      albertel   94:     &Apache::response::pushrandomnumber();
1.1       albertel   95:     return $result;
                     96: }
                     97: 
                     98: sub end_foilgroup {
                     99:     my ($target,$token,$tagstack,$parstack,$parser,$safeeval,$style)=@_;
                    100:     my $result;
1.26      albertel  101:     if ($target eq 'grade' || $target eq 'web' || $target eq 'answer' ||
                    102: 	$target eq 'tex' || $target eq 'analyze') {
1.1       albertel  103: 	my $max = &Apache::lonxml::get_param('max',$parstack,$safeeval,'-2');
                    104: 	my $randomize = &Apache::lonxml::get_param('randomize',$parstack,
                    105: 						   $safeeval,'-2');
                    106: 	my $tol = &Apache::lonxml::get_param('tol',$parstack,$safeeval,'-2');
                    107: 	if (!defined($tol)) { $tol=0; }
1.3       sakharuk  108: 	if ($target eq 'web' || $target eq 'tex') {
1.1       albertel  109: 	    $result=&displayfoils($target,$max,$randomize,$tol);
1.50      albertel  110: 	    $Apache::lonxml::post_evaluate=0;
1.1       albertel  111: 	} elsif ($target eq 'answer' ) {
                    112: 	    $result=&displayanswers($max,$randomize,$tol);
                    113: 	} elsif ( $target eq 'grade') {
                    114: 	    &grade_response($max,$randomize,$tol);
1.25      albertel  115: 	} elsif ( $target eq 'analyze') {
                    116: 	    my @shown = &whichfoils($max,$randomize);
                    117: 	    &Apache::response::analyze_store_foilgroup(\@shown,
1.26      albertel  118: 						  ['text','value','location']);
1.41      albertel  119: 	    my $part_id=
                    120: 		"$Apache::inputtags::part.$Apache::inputtags::response[-1]";
                    121: 	    $Apache::lonhomework::analyze{"$part_id.tol"}=$tol;
1.1       albertel  122: 	}
1.55    ! foxr      123: 	my $part = $Apache::inputtags::part;
        !           124: 	my $id   = $Apache::inputtags::response[-1];
1.54      foxr      125: 	&Apache::lonxml::increment_counter(&getfoilcounts($max),
1.55    ! foxr      126: 					   "$part.$id");
1.54      foxr      127: 	if ($target eq 'analyze') {
                    128: 	    &Apache::lonhomework::set_bubble_lines();
                    129: 	}
1.14      albertel  130:     } elsif ($target eq 'edit') {
                    131: 	$result=&Apache::edit::end_table();
1.1       albertel  132:     }
1.34      albertel  133:     &Apache::response::poprandomnumber();
1.1       albertel  134:     return $result;
                    135: }
                    136: 
                    137: sub get_correct_order {
                    138:     my ($tol,@foils) =@_;
                    139:     my @correctorder;
                    140:     my @value_names;
                    141:     foreach my $name (@foils) {
                    142: 	my @pair=($Apache::response::foilgroup{$name.'.value'},$name);
                    143: 	push(@value_names,\@pair);
                    144:     }
                    145:     @value_names =
                    146: 	sort {
1.17      albertel  147: 	    if (abs($a->[0] - $b->[0]) > $tol) {return ($a->[0] <=> $b->[0]);}
1.1       albertel  148: 	    return 0;
                    149: 	} @value_names;
                    150:     my @value_names_tmp=@value_names;
                    151:     my $firstpair=shift(@value_names_tmp);
                    152:     my $order=1;
                    153:     my %order;
                    154:     my $count=1;
                    155:     my $lastvalue=$firstpair->[0];
                    156:     $order{$firstpair->[1]}=$order;
                    157:     foreach my $pair (@value_names_tmp) {
                    158: 	$count++;
                    159: 	if (abs($pair->[0]-$lastvalue) > $tol ) {
                    160: 	    $order=$count;
                    161: 	}
                    162: 	$order{$pair->[1]}=$order;
                    163: 	$lastvalue=$pair->[0];
                    164:     }
                    165:     foreach my $name (@foils) {
                    166: 	push(@correctorder,$order{$name});
                    167:     }
                    168:     &Apache::lonhomework::showhash('b' => \@value_names);
                    169:     &Apache::lonhomework::showhash('b' => \@correctorder);
                    170:     return @correctorder;
                    171: }
                    172: 
                    173: sub displayanswers {
                    174:     my ($max,$randomize,$tol,@opt)=@_;
                    175:     if (!defined(@{ $Apache::response::foilgroup{'names'} })) { return; }
                    176:     my @names = @{ $Apache::response::foilgroup{'names'} };
                    177:     my @whichfoils = &whichfoils($max,$randomize);
                    178:     my @correctorder=&get_correct_order($tol,@whichfoils);
1.49      albertel  179:     my $result;
                    180:     if ($Apache::lonhomework::type eq 'exam') {
                    181: 	my @alphabet = ('A'..'Z');
                    182: 	my $i=0;
                    183: 	foreach my $order (@correctorder) {
                    184: 	    $result.=&Apache::response::answer_header('rankresponse',$i++);
                    185: 	    $result.=&Apache::response::answer_part('rankresponse',
                    186: 						    $alphabet[$order-1]);
                    187: 	    $result.=&Apache::response::answer_part('rankresponse',$order);
                    188: 	    $result.=&Apache::response::answer_footer('rankresponse');
                    189: 	}
                    190:     } else {
                    191: 	$result=&Apache::response::answer_header('rankresponse');
                    192: 	foreach my $order (@correctorder) {
                    193: 	    $result.=&Apache::response::answer_part('rankresponse',$order);
                    194: 	}
                    195: 	$result.=&Apache::response::answer_footer('rankresponse');
1.1       albertel  196:     }
                    197:     return $result;
                    198: }
                    199: 
                    200: sub check_response_order {
                    201:     my (%responsehash)=@_;
1.45      albertel  202:     my @order=sort( {$a <=> $b} values(%responsehash));
1.1       albertel  203:     my $lastvalue=0;
                    204:     my $expected=1;
                    205:     my $malformed=0;
                    206:     foreach my $current (@order) {
                    207: 	&Apache::lonxml::debug("$lastvalue $expected $malformed");
                    208: 	if (!($current == $lastvalue || $current == $expected)) {
                    209: 	    $malformed=1;
                    210: 	}
                    211: 	$expected++;
                    212: 	$lastvalue=$current;
                    213:     }
                    214:     return $malformed;
                    215: }
                    216: 
                    217: sub grade_response {
                    218:     my ($max,$randomize,$tol)=@_;
                    219:     my (@whichfoils)=&whichfoils($max,$randomize);
1.44      albertel  220:     if (!&Apache::response::submitted()) { return; }
1.1       albertel  221:     my %responsehash;
                    222:     my %grade;
1.28      albertel  223:     my ($temp,$right,$wrong,$ignored)=(1,0,0,0);
1.1       albertel  224:     my @correctorder=&get_correct_order($tol,@whichfoils);
                    225:     foreach my $name (@whichfoils) {
1.38      albertel  226: 	my $response = &Apache::response::getresponse($temp,'A is 1');
1.1       albertel  227: 	my $value=shift(@correctorder);
                    228: 	if ( $response =~ /[^\s]/) {
1.27      albertel  229: 	    $responsehash{$name}=$response;
1.1       albertel  230: 	    &Apache::lonxml::debug("submitted a $response for $value<br />\n");
                    231: 	    if ($value eq $response) {
                    232: 		$grade{$name}='1'; $right++;
                    233: 	    } else {
                    234: 		$grade{$name}='0'; $wrong++;
                    235: 	    }
                    236: 	} else {
                    237: 	    $ignored++;
                    238: 	}
                    239: 	$temp++;
                    240:     }
                    241:     my $malformed=&check_response_order(%responsehash);
                    242:     my $part=$Apache::inputtags::part;
                    243:     my $id = $Apache::inputtags::response['-1'];
                    244:     my $responsestr=&Apache::lonnet::hash2str(%responsehash);
                    245:     my $gradestr   =&Apache::lonnet::hash2str(%grade);
                    246:     my %previous=&Apache::response::check_for_previous($responsestr,
                    247: 						       $part,$id);
                    248:     &Apache::lonxml::debug("Got $right right and $wrong wrong, and $ignored were ignored and was $malformed malformed");
                    249:     my $ad;
                    250:     if ($malformed) {
                    251: 	$ad='MISORDERED_RANK';
                    252:     } elsif ($wrong==0 && $ignored==0) {
                    253: 	$ad='EXACT_ANS';
                    254:     } elsif ($wrong==0 && $right==0) {
                    255: 	#nothing submitted
                    256:     } else {
                    257: 	if ($ignored==0) {
                    258: 	    $ad='INCORRECT';
                    259: 	} else {
                    260: 	    $ad='MISSING_ANSWER';
                    261: 	}
                    262:     }
1.40      albertel  263:     if ($Apache::lonhomework::type eq 'survey' &&
                    264: 	($ad eq 'INCORRECT' || $ad eq 'EXACT_ANS') ) {
                    265: 	$ad='SUBMITTED';
                    266:     } else {
                    267: 	$Apache::lonhomework::results{"resource.$part.$id.submissiongrading"}=$gradestr;
                    268:     }
1.1       albertel  269:     $Apache::lonhomework::results{"resource.$part.$id.submission"}=
                    270: 	$responsestr;
                    271:     $Apache::lonhomework::results{"resource.$part.$id.awarddetail"}=$ad;
                    272:     &Apache::response::handle_previous(\%previous,$ad);
                    273: }
                    274: 
1.52      albertel  275: sub format_prior_answer {
                    276:     my ($mode,$answer,$other_data) = @_;
                    277:     my %lastresponse=&Apache::lonnet::str2hash($answer);
                    278:     my $foil_order  =$other_data->[0];
                    279:     my %grading     =&Apache::lonnet::str2hash($other_data->[1]);
                    280:     my $output;
                    281:     foreach my $name (@{ $foil_order }) {
                    282: 	next if (!defined($lastresponse{$name}));
                    283: 	$output .= '<tr><td>'.$lastresponse{$name}.'</td></tr>';
                    284:     }
                    285:     return if (!defined($output));
                    286:     $output =
                    287: 	'<table class="LC_prior_rank">'.$output.'</table>';
                    288:     return $output;
                    289: }
                    290: 
1.1       albertel  291: sub displayfoils {
                    292:     my ($target,$max,$randomize,$tol)=@_;
                    293:     my $result;
1.4       sakharuk  294:     my @alphabet=('A'..'Z');
1.1       albertel  295:     my (@whichfoils)=&whichfoils($max,$randomize);
                    296:     my $part=$Apache::inputtags::part;
                    297:     my $solved=$Apache::lonhomework::history{"resource.$part.solved"};
                    298:     my @whichopt=(1..($#whichfoils+1));
                    299:     my @correctorder=&get_correct_order($tol,@whichfoils);
1.20      sakharuk  300:     if ( &Apache::response::show_answer() && ($target ne 'tex')) {
1.1       albertel  301: 	foreach my $name (@whichfoils) {
                    302: 	    my $text=$Apache::response::foilgroup{$name.'.text'};
                    303: 	    my $value=shift(@correctorder);
1.46      albertel  304: 	    if ($target eq 'web') {
                    305: 		$result.='<br /><b>'.$value.':</b> '.$text;
                    306: 	    } else {
                    307: 		$result.=' \strut\\\\\strut '.$value.':'.$text;
                    308: 	    }
1.1       albertel  309: 	}
                    310:     } else {
                    311: 	my $i = 0;
1.29      albertel  312: 	my $temp=1;
1.1       albertel  313: 	my $id=$Apache::inputtags::response[-1];
                    314: 	my $part=$Apache::inputtags::part;
                    315: 	my $lastresponse=$Apache::lonhomework::history{"resource.$part.$id.submission"};
1.5       sakharuk  316: 	my %lastresponse=&Apache::lonnet::str2hash($lastresponse); 
                    317: 	my @alp = splice @alphabet, 0, $#whichopt + 1;
1.15      sakharuk  318: 	my $internal_counter=$Apache::lonxml::counter;
1.1       albertel  319: 	foreach my $name (@whichfoils) {
                    320: 	    my $lastopt=$lastresponse{$name};
1.3       sakharuk  321: 	    my $optionlist='';
                    322: 	    if ($target ne 'tex') {$optionlist="<option></option>\n";}
1.1       albertel  323: 	    my $option;
                    324: 	    foreach $option (@whichopt) {
                    325: 		if ($option eq $lastopt) {
1.3       sakharuk  326: 		    if ($target ne 'tex') {$optionlist.="<option selected=\"on\">$option</option>\n";}
1.1       albertel  327: 		} else {
1.3       sakharuk  328: 		    if ($target ne 'tex') {$optionlist.="<option>$option</option>\n";}
1.1       albertel  329: 		}
                    330: 	    }
1.12      sakharuk  331: 	    if ($target ne 'tex' && $Apache::lonhomework::type ne 'exam') {
1.51      albertel  332: 		$optionlist='<select onchange="javascript:setSubmittedPart(\''.
                    333: 		  $part.'\');" name="HWVAL_'.
1.3       sakharuk  334: 		    $Apache::inputtags::response[-1].':'.$temp.'">'.
                    335: 		        $optionlist."</select>\n";
                    336: 	    } else {
                    337: 		$optionlist=' '.$temp.' '.$optionlist.' ';
                    338: 	    }
1.1       albertel  339: 	    my $text=$Apache::response::foilgroup{$name.'.text'};
1.3       sakharuk  340: 	    if ($target ne 'tex') {
1.12      sakharuk  341: 		if ($Apache::lonhomework::type ne 'exam') {
                    342: 		    $result.='<br />'.$optionlist.$text."\n";
                    343: 		} else {
                    344: 		    $result.='<br />'.$text."\n";
                    345: 		}
1.4       sakharuk  346: 		if ($Apache::lonhomework::type eq 'exam') {
1.22      albertel  347: 		    my @values=(1..scalar(@whichopt));
                    348: 		    $result.=&Apache::optionresponse::webbubbles(\@values,\@whichopt,$temp,$lastopt);
1.4       sakharuk  349: 		}
                    350: 	    } else {
                    351: 		if ($Apache::lonhomework::type eq 'exam') {
1.33      sakharuk  352: 		    $result.='\vskip 0 mm   '.$text.' \vskip 0 mm '."\n";
1.36      albertel  353: 		    $result.='\vskip -1 mm\noindent\begin{enumerate}\item[\textbf{'.$internal_counter.'}.]'.&Apache::optionresponse::bubbles(\@alp,\@whichopt,'rankresponse').'\end{enumerate} \vskip -8 mm \strut ';
1.15      sakharuk  354: 		    $internal_counter++;
1.4       sakharuk  355: 		} else {
1.16      sakharuk  356: 		    $result.=' \vskip 0mm \framebox[5 mm][s]{\tiny\strut} '.$text."\n";
1.4       sakharuk  357: 		}
                    358: 	    }
1.1       albertel  359: 	    $temp++;
                    360: 	}
                    361:     }
1.52      albertel  362:     if ($target eq 'web') {
                    363: 	&Apache::response::setup_prior_tries_hash(\&format_prior_answer,
                    364: 						  [\@whichfoils,
                    365: 						   'submissiongrading']);
                    366:     }
1.5       sakharuk  367:     if ($target ne 'tex') {$result.="<br />";} else {$result.=' \vskip 0 mm ';}
1.1       albertel  368:     return $result;
                    369: }
                    370: 
                    371: sub getfoilcounts {
                    372:     my ($max)=@_;
                    373:     # +1 since instructors will count from 1
                    374:     my $count = $#{ $Apache::response::foilgroup{'names'} }+1;
                    375:     if (&Apache::response::showallfoils()) { $max=$count; }
                    376:     if ($count>$max) { $count=$max } 
                    377:     &Apache::lonxml::debug("Count is $count from $max");
                    378:     return $count;
                    379: }
                    380: 
                    381: sub whichfoils {
                    382:     my ($max,$randomize)=@_;
1.13      albertel  383:     return &Apache::response::whichorder($max,$randomize,
                    384: 					 &Apache::response::showallfoils(),
                    385: 					 \%Apache::response::foilgroup);
1.1       albertel  386: }
                    387: 
                    388: sub start_conceptgroup {
                    389:     my ($target,$token,$tagstack,$parstack,$parser,$safeeval,$style)=@_;
                    390:     $Apache::rankresponse::conceptgroup=1;
                    391:     %Apache::response::conceptgroup=();
                    392:     my $result;
                    393:     if ($target eq 'edit') {
                    394: 	$result.=&Apache::edit::tag_start($target,$token,
                    395: 					  "Concept Grouped Foils");
                    396: 	$result.=&Apache::edit::text_arg('Concept:','concept',$token,'50').
                    397: 	    &Apache::edit::end_row().&Apache::edit::start_spanning_row();
                    398:     }
                    399:     if ($target eq 'modified') {
                    400: 	my $constructtag=&Apache::edit::get_new_args($token,$parstack,
                    401: 						     $safeeval,'concept');
                    402: 	if ($constructtag) { $result = &Apache::edit::rebuild_tag($token); }
                    403:     }
                    404:     return $result;
                    405: }
                    406: 
                    407: sub end_conceptgroup {
                    408:     my ($target,$token,$tagstack,$parstack,$parser,$safeeval,$style)=@_;
                    409:     $Apache::rankresponse::conceptgroup=0;
                    410:     my $result='';
1.25      albertel  411:     if ($target eq 'web' || $target eq 'grade' || $target eq 'answer' ||
                    412: 	$target eq 'tex' || $target eq 'analyze') {
1.1       albertel  413: 	#if not there aren't any foils to display and thus no question
1.25      albertel  414: 	&Apache::response::pick_foil_for_concept($target,
                    415: 						 ['value','text','location'],
                    416: 						 \%Apache::hint::rank,
                    417: 						 $parstack,$safeeval);
1.1       albertel  418:     } elsif ($target eq 'edit') {
                    419: 	$result=&Apache::edit::end_table();
                    420:     }
                    421:     return $result;
                    422: }
                    423: 
                    424: sub insert_conceptgroup {
                    425:     my $result="\n\t\t<conceptgroup concept=\"\">".&insert_foil()."\n\t\t</conceptgroup>\n";
                    426:     return $result;
                    427: }
                    428: 
                    429: sub start_foil {
                    430:     my ($target,$token,$tagstack,$parstack,$parser,$safeeval,$style)=@_;
                    431:     my $result='';
1.25      albertel  432:     if ($target eq 'web' || $target eq 'tex' || $target eq 'analyze') {
1.1       albertel  433: 	&Apache::lonxml::startredirection;
1.39      albertel  434: 	if ($target eq 'analyze') {
                    435: 	    &Apache::response::check_if_computed($token,$parstack,$safeeval,'value');
                    436: 	}
1.1       albertel  437:     } elsif ($target eq 'edit') {
                    438: 	$result=&Apache::edit::tag_start($target,$token,"Foil");
                    439: 	my $level='-2';
                    440: 	if ($$tagstack[-2] eq 'conceptgroup') { $level = '-3'; }
                    441: 	$result.=&Apache::edit::text_arg('Name:','name',$token);
                    442: 	$result.= &Apache::edit::text_arg('Rank Value:','value',$token,'15');
                    443: 	my $randomize=&Apache::lonxml::get_param('randomize',$parstack,
                    444: 						 $safeeval,'-3');
                    445: 	if ($randomize ne 'no') {
                    446: 	    $result.=&Apache::edit::select_arg('Location:','location',
                    447: 					     ['random','top','bottom'],$token);
                    448: 	}
                    449: 	$result .=&Apache::edit::end_row().&Apache::edit::start_spanning_row();
                    450:     } elsif ($target eq 'modified') {
                    451: 	my $constructtag=&Apache::edit::get_new_args($token,$parstack,
                    452: 						     $safeeval,'value',
                    453: 						     'name','location');
                    454: 	if ($constructtag) { $result = &Apache::edit::rebuild_tag($token); }
                    455:     }
                    456:     return $result;
                    457: }
                    458: 
                    459: sub end_foil {
                    460:     my ($target,$token,$tagstack,$parstack,$parser,$safeeval,$style)=@_;
                    461:     my $text ='';
                    462:     my $result = '';
1.25      albertel  463:     if ($target eq 'web' || $target eq 'tex' || $target eq 'analyze') {
1.1       albertel  464: 	$text=&Apache::lonxml::endredirection;
                    465:     }
1.25      albertel  466:     if ($target eq 'web' || $target eq 'grade' || $target eq 'answer' ||
                    467: 	$target eq 'tex' || $target eq 'analyze') {
1.1       albertel  468: 	my $value = &Apache::lonxml::get_param('value',$parstack,$safeeval);
1.42      albertel  469: 	if ($target eq 'tex' && $Apache::lonhomework::type eq 'exam') {
                    470: 	    $text='\vskip 5mm $\triangleright$ '.$text;
                    471: 	}
1.1       albertel  472: 	if ($value ne 'unused') {
                    473: 	    my $name = &Apache::lonxml::get_param('name',$parstack,$safeeval);
                    474: 	    &Apache::lonxml::debug("Got a name of :$name:");
1.48      albertel  475: 	    if ($name eq "") {
1.47      albertel  476: 		&Apache::lonxml::warning("Foils without names exist. This can cause problems to malfunction.");
1.43      albertel  477: 		$name=$Apache::lonxml::curdepth;
                    478: 	    }
1.1       albertel  479: 	    &Apache::lonxml::debug("Using a name of :$name:");
1.30      albertel  480: 	    if (defined($Apache::response::foilnames{$name})) {
                    481: 		&Apache::lonxml::error(&mt("Foil name <b><tt>[_1]</tt></b> appears more than once. Foil names need to be unique.",$name));
                    482: 	    }
1.31      albertel  483: 	    $Apache::response::foilnames{$name}++;
1.30      albertel  484: 	    my $location =&Apache::lonxml::get_param('location',$parstack,
                    485: 						     $safeeval);
1.1       albertel  486: 	    if ( $Apache::rankresponse::conceptgroup
                    487: 		 && !&Apache::response::showallfoils() ) {
                    488: 		push @{ $Apache::response::conceptgroup{'names'} }, $name;
                    489: 		$Apache::response::conceptgroup{"$name.value"} = $value;
1.42      albertel  490: 		$Apache::response::conceptgroup{"$name.text"} = $text;
1.1       albertel  491: 		$Apache::response::conceptgroup{"$name.location"} = $location;
                    492: 	    } else {
                    493: 		push @{ $Apache::response::foilgroup{'names'} }, $name;
                    494: 		$Apache::response::foilgroup{"$name.value"} = $value;
1.42      albertel  495: 		$Apache::response::foilgroup{"$name.text"} = $text;
1.1       albertel  496: 		$Apache::response::foilgroup{"$name.location"} = $location;
                    497: 	    }
                    498: 	}
                    499:     }
                    500:     if ($target eq 'edit') {
                    501: 	$result.= &Apache::edit::tag_end($target,$token,'');
                    502:     }
                    503:     return $result;
                    504: }
                    505: 
                    506: sub insert_foil {
                    507:     return '
                    508: <foil name="" value="unused">
                    509: <startouttext />
                    510: <endouttext />
                    511: </foil>';
                    512: }
                    513: 1;
                    514: __END__

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