File:  [LON-CAPA] / loncom / homework / caparesponse / caparesponse.pm
Revision 1.206: download - view: text, annotated - select for diffs
Tue Jan 23 22:00:16 2007 UTC (17 years, 3 months ago) by albertel
Branches: MAIN
CVS tags: HEAD
- BUG5160 - if there isn't a specific answer to show pick one and show it

    1: # The LearningOnline Network with CAPA
    2: # caparesponse definition
    3: #
    4: # $Id: caparesponse.pm,v 1.206 2007/01/23 22:00:16 albertel 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: 
   29: package Apache::caparesponse;
   30: use strict;
   31: use capa;
   32: use Safe::Hole;
   33: use Apache::lonmaxima();
   34: use Apache::lonlocal;
   35: use Apache::lonnet;
   36: use Apache::response();
   37: use Storable qw(dclone);
   38: 
   39: BEGIN {
   40:     &Apache::lonxml::register('Apache::caparesponse',('numericalresponse','stringresponse','formularesponse'));
   41: }
   42: 
   43: my %answer;
   44: my @answers;
   45: sub get_answer { return %answer; };
   46: sub push_answer{ push(@answers,dclone(\%answer)); undef(%answer) }
   47: sub pop_answer { %answer = %{pop(@answers)}; };
   48: 
   49: my $cur_name;
   50: my $tag_internal_answer_name = 'INTERNAL';
   51: 
   52: sub start_answer {
   53:     my ($target,$token,$tagstack,$parstack,$parser,$safeeval)=@_;
   54:     my $result;
   55:     $cur_name = &Apache::lonxml::get_param('name',$parstack,$safeeval);
   56:     if ($cur_name =~ /^\s*$/) { $cur_name = $Apache::lonxml::curdepth; }
   57:     my $type = &Apache::lonxml::get_param('type',$parstack,$safeeval);
   58:     if (!defined($type) && $tagstack->[-2] eq 'answergroup') {
   59: 	$type = &Apache::lonxml::get_param('type',$parstack,$safeeval,-2);
   60:     }
   61:     if (!defined($type)) { $type = 'ordered' };
   62:     $answer{$cur_name}= { 'type' => $type,
   63: 			  'answers' => [] };
   64:     return $result;
   65: }
   66: 
   67: sub end_answer {
   68:     my ($target,$token,$tagstack,$parstack,$parser,$safeeval)=@_;
   69:     my $result;
   70:     undef($cur_name);
   71:     return $result;
   72: }
   73: 
   74: sub start_answergroup {
   75:     my ($target,$token,$tagstack,$parstack,$parser,$safeeval)=@_;
   76:     my $result;
   77:     return $result;
   78: }
   79: 
   80: sub end_answergroup {
   81:     my ($target,$token,$tagstack,$parstack,$parser,$safeeval)=@_;
   82:     my $result;
   83:     if ($target eq 'web') {
   84:     	if (  &Apache::response::show_answer() ) {  
   85: 	    my $partid = $Apache::inputtags::part;
   86: 	    my $id = $Apache::inputtags::response[-1];
   87: 	    &set_answertext($Apache::lonhomework::history{"resource.$partid.$id.answername"},
   88: 			    $target,$token,$tagstack,$parstack,$parser,
   89: 			    $safeeval,-2);
   90: 	}
   91:     }
   92:     return $result;
   93: }
   94: 
   95: sub start_value {
   96:     my ($target,$token,$tagstack,$parstack,$parser,$safeeval,$style)=@_;
   97:     my $result;
   98:     if ( $target eq 'web' || $target eq 'tex' ||
   99: 	 $target eq 'grade' || $target eq 'webgrade' ||
  100: 	 $target eq 'answer' || $target eq 'analyze' ) {
  101: 	my $bodytext = &Apache::lonxml::get_all_text("/value",$parser,$style);
  102: 	$bodytext = &Apache::run::evaluate($bodytext,$safeeval,
  103: 					   $$parstack[-1]);
  104: 	
  105: 	push(@{ $answer{$cur_name}{'answers'} },[$bodytext]);
  106: 	
  107:     }
  108:     return $result;
  109: }
  110: 
  111: sub end_value {
  112:     my ($target,$token,$tagstack,$parstack,$parser,$safeeval)=@_;
  113:     my $result;
  114:     return $result;
  115: }
  116: 
  117: sub start_vector {
  118:     my ($target,$token,$tagstack,$parstack,$parser,$safeeval,$style)=@_;
  119:     my $result;
  120:     if ( $target eq 'web' || $target eq 'tex' ||
  121: 	 $target eq 'grade' || $target eq 'webgrade' ||
  122: 	 $target eq 'answer' || $target eq 'analyze' ) {
  123: 	my $bodytext = &Apache::lonxml::get_all_text("/vector",$parser,$style);
  124: 	my @values = &Apache::run::run($bodytext,$safeeval,$$parstack[-1]);
  125: 	if (@values == 1) {
  126: 	    @values = split(',',$values[0]);
  127: 	}
  128: 	push(@{ $answer{$cur_name}{'answers'} },\@values);
  129:     }
  130:     return $result;
  131: }
  132: 
  133: sub end_vector {
  134:     my ($target,$token,$tagstack,$parstack,$parser,$safeeval)=@_;
  135:     my $result;
  136:     return $result;
  137: }
  138: 
  139: sub start_array {
  140:     my ($target,$token,$tagstack,$parstack,$parser,$safeeval,$style)=@_;
  141:     my $result;
  142:     if ( $target eq 'web' || $target eq 'tex' ||
  143: 	 $target eq 'grade' || $target eq 'webgrade' ||
  144: 	 $target eq 'answer' || $target eq 'analyze' ) {
  145: 	my $bodytext = &Apache::lonxml::get_all_text("/array",$parser,$style);
  146: 	my @values = &Apache::run::evaluate($bodytext,$safeeval,
  147: 					    $$parstack[-1]);
  148: 	push(@{ $answer{$cur_name}{'answers'} },@values);
  149:     }
  150:     return $result;
  151: }
  152: 
  153: sub end_array {
  154:     my ($target,$token,$tagstack,$parstack,$parser,$safeeval)=@_;
  155:     my $result;
  156:     return $result;
  157: }
  158: 
  159: sub start_unit {
  160:     my ($target,$token,$tagstack,$parstack,$parser,$safeeval)=@_;
  161:     my $result;
  162:     return $result;
  163: }
  164: 
  165: sub end_unit {
  166:     my ($target,$token,$tagstack,$parstack,$parser,$safeeval)=@_;
  167:     my $result;
  168:     return $result;
  169: }
  170: 
  171: sub start_numericalresponse {
  172:     my ($target,$token,$tagstack,$parstack,$parser,$safeeval)=@_;
  173:     &Apache::lonxml::register('Apache::caparesponse',
  174: 			      ('answer','answergroup','value','array','unit',
  175: 			       'vector'));
  176:     my $id = &Apache::response::start_response($parstack,$safeeval);
  177:     my $result;
  178:     undef(%answer);
  179:     undef(%{$safeeval->varglob('LONCAPA::CAPAresponse_args')});
  180:     if ($target eq 'edit') {
  181: 	$result.=&Apache::edit::tag_start($target,$token);
  182: 	$result.=&Apache::edit::text_arg('Answer:','answer',$token);
  183: 	if ($token->[1] eq 'numericalresponse') {
  184: 	    $result.=&Apache::edit::text_arg('Incorrect Answers:','incorrect',
  185: 					     $token).
  186: 		&Apache::loncommon::help_open_topic('numerical_wrong_answers');
  187: 	    $result.=&Apache::edit::text_arg('Unit:','unit',$token,5).
  188: 		&Apache::loncommon::help_open_topic('Physical_Units');
  189: 	    $result.=&Apache::edit::text_arg('Format:','format',$token,4).
  190: 		&Apache::loncommon::help_open_topic('Numerical_Response_Format');
  191: 	} elsif ($token->[1] eq 'formularesponse') {
  192: 	    $result.=&Apache::edit::text_arg('Sample Points:','samples',
  193: 					     $token,40).
  194: 	      &Apache::loncommon::help_open_topic('Formula_Response_Sampling');
  195: 	}
  196: 	$result.=&Apache::edit::end_row().&Apache::edit::start_spanning_row();
  197:     } elsif ($target eq 'modified') {
  198: 	my $constructtag;
  199: 	if ($token->[1] eq 'numericalresponse') {
  200: 	    $constructtag=&Apache::edit::get_new_args($token,$parstack,
  201: 						      $safeeval,'answer',
  202:  						      'incorrect','unit',
  203: 						      'format');
  204: 	} elsif ($token->[1] eq 'formularesponse') {
  205: 	    $constructtag=&Apache::edit::get_new_args($token,$parstack,
  206: 						      $safeeval,'answer',
  207: 						      'samples');
  208: 	}
  209: 	if ($constructtag) {
  210: 	    $result = &Apache::edit::rebuild_tag($token);
  211: 	    $result.=&Apache::edit::handle_insert();
  212: 	}
  213:     } elsif ($target eq 'meta') {
  214: 	$result=&Apache::response::meta_package_write('numericalresponse');
  215:     } elsif ($target eq 'answer' || $target eq 'grade') {
  216: 	&Apache::response::reset_params();
  217:     } elsif ($target eq 'web') {
  218: 	my $partid = $Apache::inputtags::part;
  219: 	my $hideunit=&Apache::lonnet::EXT('resource.'.$partid.'_'.$id.'.turnoffunit');
  220: 	&Apache::lonxml::debug("Got unit $hideunit for $partid $id");
  221: 	#no way to enter units, with radio buttons
  222: 	if (lc($hideunit) eq "yes") {
  223: 	    my $unit=&Apache::lonxml::get_param_var('unit',$parstack,
  224: 						    $safeeval);
  225: 	    if ($unit =~ /\S/) { $result.=" (in $unit) "; }
  226: 	}
  227: 	if (  &Apache::response::show_answer() ) {
  228: 	    &set_answertext($tag_internal_answer_name,$target,$token,$tagstack,
  229: 			    $parstack,$parser,$safeeval,-1);
  230: 	}
  231:     }
  232:     return $result;
  233: }
  234: 
  235: sub set_answertext {
  236:     my ($name,$target,$token,$tagstack,$parstack,$parser,$safeeval,
  237: 	$response_level) = @_;
  238:     &add_in_tag_answer($parstack,$safeeval,$response_level);
  239: 
  240:     if ($name eq '' || !ref($answer{$name})) {
  241: 	if (ref($answer{$tag_internal_answer_name})) {
  242: 	    $name = $tag_internal_answer_name;
  243: 	} else {
  244: 	    $name = (sort(keys(%answer)))[0];
  245: 	}
  246:     }
  247:     return if ($name eq '' || !ref($answer{$name}));
  248: 
  249:     my (@formats)=&Apache::lonxml::get_param_var('format',$parstack,
  250: 						 $safeeval,$response_level);
  251:     my $unit=&Apache::lonxml::get_param_var('unit',$parstack,$safeeval,
  252: 					    $response_level);
  253: 
  254:     &Apache::lonxml::debug("answer looks to be $name");
  255:     my @answertxt;
  256:     for (my $i=0; $i < scalar(@{$answer{$name}{'answers'}}); $i++) {
  257: 	my $answertxt;
  258: 	my $answer=$answer{$name}{'answers'}[$i];
  259: 	foreach my $element (@$answer) {
  260: 	    if ( scalar(@$tagstack)
  261: 		 && $tagstack->[$response_level] ne 'numericalresponse') {
  262: 		$answertxt.=$element.',';
  263: 	    } else {
  264: 		my $format;
  265: 		if ($#formats > 0) {
  266: 		    $format=$formats[$i];
  267: 		} else {
  268: 		    $format=$formats[0];
  269: 		}
  270: 		if ($unit=~/\$/) { $format="\$".$format; $unit=~s/\$//g; }
  271: 		if ($unit=~/\,/) { $format="\,".$format; $unit=~s/\,//g; }
  272: 		my $formatted=&format_number($element,$format,$target,
  273: 					     $safeeval);
  274: 		$answertxt.=' '.$formatted.',';
  275: 	    }
  276: 	    
  277: 	}
  278: 	chop($answertxt);
  279: 	if ($target eq 'web') {
  280: 	    $answertxt.=" $unit ";
  281: 	}
  282: 
  283: 	push(@answertxt,$answertxt)
  284:     }
  285: 	
  286:     my $id = $Apache::inputtags::response[-1];
  287:     $Apache::inputtags::answertxt{$id}=\@answertxt;
  288: }
  289: 
  290: sub setup_capa_args {
  291:     my ($safeeval,$parstack,$args,$response) = @_;
  292:     my $args_ref= \%{$safeeval->varglob('LONCAPA::CAPAresponse_args')};
  293:     undef(%{ $args_ref });
  294:  
  295:     foreach my $arg (@{$args}) {
  296: 	$$args_ref{$arg}=
  297: 	    &Apache::lonxml::get_param($arg,$parstack,$safeeval);
  298:     }
  299:     foreach my $key (keys(%Apache::inputtags::params)) {
  300: 	$$args_ref{$key}=$Apache::inputtags::params{$key};
  301:     }
  302:     &setup_capa_response($args_ref,$response);
  303:     return $args_ref;
  304: }
  305: 
  306: sub setup_capa_response {
  307:     my ($args_ref,$response) = @_;   
  308: 
  309:     use Data::Dumper;
  310:     &Apache::lonxml::debug("response dump is ".&Dumper($response));
  311:     
  312:     if (ref($response)) {
  313: 	$$args_ref{'response'}=dclone($response);
  314:     } else {
  315: 	$$args_ref{'response'}=dclone([$response]);
  316:     }
  317: }
  318: 
  319: sub check_submission {
  320:     my ($response,$partid,$id,$tag,$parstack,$safeeval,$ignore_sig)=@_;
  321:     my @args = ('type','tol','sig','format','unit','calc','samples');
  322:     my $args_ref = &setup_capa_args($safeeval,$parstack,\@args,$response);
  323: 
  324:     my $hideunit=
  325: 	&Apache::lonnet::EXT('resource.'.$partid.'_'.$id.'.turnoffunit');
  326:         #no way to enter units, with radio buttons
  327:     if ($Apache::lonhomework::type eq 'exam' ||
  328: 	lc($hideunit) eq "yes") {
  329: 	delete($$args_ref{'unit'});
  330:     }
  331:     #sig fig don't make much sense either
  332:     if (($Apache::lonhomework::type eq 'exam' ||
  333: 	 &Apache::response::submitted('scantron') ||
  334: 	 $ignore_sig) &&
  335: 	$tag eq 'numericalresponse') {
  336: 	delete($$args_ref{'sig'});
  337:     }
  338:     
  339:     if ($tag eq 'formularesponse') {
  340: 	if ($$args_ref{'samples'}) {
  341: 	    $$args_ref{'type'}='fml';
  342: 	} else {
  343: 	    $$args_ref{'type'}='math';
  344: 	}
  345:     } elsif ($tag eq 'numericalresponse') {
  346: 	$$args_ref{'type'}='float';
  347:     }
  348:     
  349:     &add_in_tag_answer($parstack,$safeeval);
  350: 
  351:     my (@final_awards,@final_msgs,@names);
  352:     foreach my $name (keys(%answer)) {
  353: 	&Apache::lonxml::debug(" doing $name with ".join(':',@{ $answer{$name}{'answers'} }));
  354: 	
  355: 	${$safeeval->varglob('LONCAPA::CAPAresponse_answer')}=dclone($answer{$name});
  356: 	&setup_capa_response($args_ref,$response);
  357: 	use Time::HiRes;
  358: 	my $t0 = [Time::HiRes::gettimeofday()];
  359: 	my ($result,@msgs) = 
  360: 	    &Apache::run::run("&caparesponse_check_list()",$safeeval);
  361: 	&Apache::lonxml::debug("checking $name $result with $response took ".&Time::HiRes::tv_interval($t0));
  362: 	&Apache::lonxml::debug('msgs are '.join(':',@msgs));
  363: 	my ($awards)=split(/:/,$result);
  364: 	my @awards= split(/,/,$awards);
  365: 	my ($ad, $msg) = &Apache::inputtags::finalizeawards(\@awards,\@msgs);
  366: 	push(@final_awards,$ad);
  367: 	push(@final_msgs,$msg);
  368: 	push(@names,$name);
  369:     }
  370:     my ($ad, $msg, $name) = &Apache::inputtags::finalizeawards(\@final_awards,
  371: 							       \@final_msgs,
  372: 							       \@names,1);
  373:     &Apache::lonxml::debug(" name of picked award is $name from ".join(', ',@names));
  374:     return($ad,$msg, $name);
  375: }
  376: 
  377: sub add_in_tag_answer {
  378:     my ($parstack,$safeeval,$response_level) = @_;
  379:     my @answer=&Apache::lonxml::get_param_var('answer',$parstack,$safeeval,
  380: 					      $response_level);
  381:     &Apache::lonxml::debug('answer is'.join(':',@answer));
  382:     if (@answer && defined($answer[0])) {
  383: 	$answer{$tag_internal_answer_name}= {'type' => 'ordered',
  384: 					     'answers' => [\@answer] };
  385:     }
  386: }
  387: 
  388: sub capa_formula_fix {
  389:    my ($expression)=@_;
  390:    return &Apache::response::implicit_multiplication($expression);
  391: }
  392: 
  393: sub end_numericalresponse {
  394:     my ($target,$token,$tagstack,$parstack,$parser,$safeeval,$style)=@_;
  395:     my $increment=1;
  396:     my $result = '';
  397:     if (!$Apache::lonxml::default_homework_loaded) {
  398: 	&Apache::lonxml::default_homework_load($safeeval);
  399:     }
  400:     my $partid = $Apache::inputtags::part;
  401:     my $id = $Apache::inputtags::response[-1];
  402:     my $tag;
  403:     my $safehole = new Safe::Hole;
  404:     $safeeval->share_from('capa',['&caparesponse_capa_check_answer']);
  405: 
  406:     if (scalar(@$tagstack)) { $tag=$$tagstack[-1]; }
  407:     if ( $target eq 'grade' && &Apache::response::submitted() ) {
  408: 	&Apache::response::setup_params($tag,$safeeval);
  409: 	if ($Apache::lonhomework::type eq 'exam' && 
  410: 	    (($tag eq 'formularesponse') || ($tag eq 'mathresponse'))) {
  411: 	    $increment=&Apache::response::scored_response($partid,$id);
  412: 	} else {
  413: 	    my $response = &Apache::response::getresponse();
  414: 	    if ( $response =~ /[^\s]/) {
  415: 		my %previous = &Apache::response::check_for_previous($response,$partid,$id);
  416: 		&Apache::lonxml::debug("submitted a $response<br>\n");
  417: 		&Apache::lonxml::debug($$parstack[-1] . "\n<br>");
  418: 		
  419: 		if ( &Apache::response::submitted('scantron')) {
  420: 		    my ($values,$display)=&make_numerical_bubbles($partid,$id,
  421: 						  $target,$parstack,$safeeval);
  422: 		    $response=$values->[$response];
  423: 		}
  424: 		$Apache::lonhomework::results{"resource.$partid.$id.submission"}=$response;
  425: 		my ($ad,$msg,$name)=&check_submission($response,$partid,$id,
  426: 						      $tag,$parstack,
  427: 						      $safeeval);
  428: 
  429: 		&Apache::lonxml::debug('ad is'.$ad);
  430: 		if ($ad eq 'SIG_FAIL') {
  431: 		    my ($sig_u,$sig_l)=
  432: 			&get_sigrange($Apache::inputtags::params{'sig'});
  433: 		    $msg=join(':',$msg,$sig_l,$sig_u);
  434: 		    &Apache::lonxml::debug("sigs bad $sig_u $sig_l ".
  435: 					   $Apache::inputtags::params{'sig'});
  436: 		}
  437: 		&Apache::lonxml::debug("\n<br>result:$result:$Apache::lonxml::curdepth<br>\n");
  438: 		if ($Apache::lonhomework::type eq 'survey' &&
  439: 		    ($ad eq 'INCORRECT' || $ad eq 'APPROX_ANS' ||
  440: 		     $ad eq 'EXACT_ANS')) {
  441: 		    $ad='SUBMITTED';
  442: 		}
  443: 		&Apache::response::handle_previous(\%previous,$ad);
  444: 		$Apache::lonhomework::results{"resource.$partid.$id.awarddetail"}=$ad;
  445: 		$Apache::lonhomework::results{"resource.$partid.$id.awardmsg"}=$msg;
  446: 		$Apache::lonhomework::results{"resource.$partid.$id.answername"}=$name;
  447: 		$result='';
  448: 	    }
  449: 	}
  450:     } elsif ($target eq 'web' || $target eq 'tex') {
  451: 	&check_for_answer_errors($parstack,$safeeval);
  452: 	my $award = $Apache::lonhomework::history{"resource.$Apache::inputtags::part.solved"};
  453: 	my $status = $Apache::inputtags::status['-1'];
  454: 	if ($Apache::lonhomework::type eq 'exam') {
  455: 	    # FIXME support multi dimensional numerical problems
  456:             #       in exam bubbles
  457: 	    my ($bubble_values,$bubble_display)=
  458: 		&make_numerical_bubbles($partid,$id,$target,$parstack,
  459: 					$safeeval);
  460: 	    my $number_of_bubbles = scalar(@{ $bubble_values });
  461: 	    my $unit=&Apache::lonxml::get_param_var('unit',$parstack,
  462: 						    $safeeval);
  463: 	    my @alphabet=('A'..'Z');
  464: 	    if ($target eq 'web') {
  465: 		if ($tag eq 'numericalresponse') {
  466: 		    if ($unit=~/\S/) {$result.=' (in '.$unit.')<br /><br />';}
  467: 		    $result.= '<table border="1"><tr>';
  468: 		    my $previous=$Apache::lonhomework::history{"resource.$Apache::inputtags::part.$id.submission"};
  469: 		    for (my $ind=0;$ind<$number_of_bubbles;$ind++) {
  470: 			my $checked='';
  471: 			if ($previous eq $bubble_values->[$ind]) {
  472: 			    $checked=" checked='on' ";
  473: 			}
  474: 			$result.='<td><input type="radio" name="HWVAL_'.$id.
  475: 			    '" value="'.$bubble_values->[$ind].'" '.$checked
  476: 			    .' /><b>'.$alphabet[$ind].'</b>: '.
  477: 			    $bubble_display->[$ind].'</td>';
  478: 		    }
  479: 		    $result.='</tr></table>';
  480: 		}
  481: 	    } elsif ($target eq 'tex') {
  482: 		if ((defined $unit) and ($unit=~/\S/) and ($Apache::lonhomework::type eq 'exam')) {
  483: 		    $result.=' \textit{(in} \verb|'.$unit.'|\textit{)} ';
  484: 		}
  485: 		if ($tag eq 'numericalresponse') {
  486: 		    my ($celllength,$number_of_tables,@table_range)=
  487: 			&get_table_sizes($number_of_bubbles,$bubble_display);
  488: 		    my $j=0;
  489: 		    my $cou=0;
  490: 		    $result.='\vskip -1 mm \noindent \begin{enumerate}\item[\textbf{'.$Apache::lonxml::counter.'}.]';
  491: 		    for (my $i=0;$i<$number_of_tables;$i++) {
  492: 			$result.='\vskip -1 mm \noindent \setlength{\tabcolsep}{2 mm}\begin{tabular}{';
  493: 			for (my $ind=0;$ind<$table_range[$j];$ind++) {
  494: 			    $result.='p{3 mm}p{'.$celllength.' mm}';
  495: 			}
  496: 			$result.='}';
  497: 			for (my $ind=$cou;$ind<$cou+$table_range[$j];$ind++) {
  498: 			    $result.='\hskip -4 mm {\small \textbf{'.$alphabet[$ind].'}}$\bigcirc$ & \hskip -3 mm {\small '.$bubble_display->[$ind].'} ';
  499: 			    if ($ind != $cou+$table_range[$j]-1) {$result.=' & ';}
  500: 			}
  501: 			$cou += $table_range[$j];
  502: 			$j++;
  503: 			$result.='\\\\\end{tabular}\vskip 0 mm ';
  504: 		    }
  505: 		    $result.='\end{enumerate}';
  506: 		} else {
  507: 		    $increment = &Apache::response::repetition();
  508: 		}
  509: 	    }
  510: 	}
  511:     } elsif ($target eq 'edit') {
  512: 	$result.='</td></tr>'.&Apache::edit::end_table;
  513:     } elsif ($target eq 'answer' || $target eq 'analyze') {
  514: 	my $part_id="$partid.$id";
  515: 	if ($target eq 'analyze') {
  516: 	    push (@{ $Apache::lonhomework::analyze{"parts"} },$part_id);
  517: 	    $Apache::lonhomework::analyze{"$part_id.type"} = $tag;
  518: 	    my (@incorrect)=&Apache::lonxml::get_param_var('incorrect',$parstack,$safeeval);
  519: 	    if ($#incorrect eq 0) { @incorrect=(split(/,/,$incorrect[0])); }
  520: 	    push (@{ $Apache::lonhomework::analyze{"$part_id.incorrect"} }, @incorrect);
  521: 	    &Apache::response::check_if_computed($token,$parstack,
  522: 						 $safeeval,'answer');
  523: 	}
  524: 	if (scalar(@$tagstack)) {
  525: 	    &Apache::response::setup_params($tag,$safeeval);
  526: 	}
  527: 	&add_in_tag_answer($parstack,$safeeval);
  528: 	my (@formats)=&Apache::lonxml::get_param_var('format',$parstack,$safeeval);
  529: 
  530: 	my $unit=&Apache::lonxml::get_param_var('unit',$parstack,$safeeval);
  531: 	
  532: 	if ($target eq 'answer') {
  533: 	    $result.=&Apache::response::answer_header($tag,undef,
  534: 						      scalar(keys(%answer)));
  535: 	    if ($tag eq 'numericalresponse'
  536: 		&& $Apache::lonhomework::type eq 'exam') {
  537: 		my ($bubble_values,undef,$correct) = &make_numerical_bubbles($partid,
  538: 					     $id,$target,$parstack,$safeeval);
  539: 		$result.=&Apache::response::answer_part($tag,$correct);
  540: 	    }
  541: 	}
  542: 	foreach my $name (sort(keys(%answer))) {
  543: 	    my @answers = @{ $answer{$name}{'answers'} };
  544: 	    if ($target eq 'analyze') {
  545: 		foreach my $info ('answer','ans_high','ans_low','format') {
  546: 		    $Apache::lonhomework::analyze{"$part_id.$info"}{$name}=[];
  547: 		}
  548: 	    }
  549: 	    my ($sigline,$tolline);
  550: 	    if ($name ne $tag_internal_answer_name 
  551: 		|| scalar(keys(%answer)) > 1) {
  552: 		$result.=&Apache::response::answer_part($tag,$name);
  553: 	    }
  554: 	    for(my $i=0;$i<=$#answers;$i++) {
  555: 		my $ans=$answers[$i];
  556: 		my $fmt=$formats[0];
  557: 		if (@formats && $#formats) {$fmt=$formats[$i];}
  558: 		my ($sighigh,$siglow);
  559: 		if ($Apache::inputtags::params{'sig'}) {
  560: 		    ($sighigh,$siglow)=&get_sigrange($Apache::inputtags::params{'sig'});
  561: 		}
  562: 		my @vector;
  563: 		if (ref($ans)) {
  564: 		    @vector = @{ $ans };
  565: 		} else {
  566: 		    @vector = ($ans);
  567: 		}
  568: 		my @all_answer_info;
  569: 		foreach my $element (@vector) {
  570: 		    my ($high,$low);
  571: 		    if ($Apache::inputtags::params{'tol'}) {
  572: 			($high,$low)=&get_tolrange($element,$Apache::inputtags::params{'tol'});
  573: 		    }
  574: 		    if ($target eq 'answer') {
  575: 			if ($fmt && $tag eq 'numericalresponse') {
  576: 			    $fmt=~s/e/E/g;
  577: 			    if ($unit=~/\$/) { $fmt="\$".$fmt; $unit=~s/\$//g; }
  578: 			    if ($unit=~/\,/) { $fmt="\,".$fmt; $unit=~s/\,//g; }
  579: 			    $element = &format_number($element,$fmt,$target,$safeeval);
  580: 			    #if ($high) {
  581: 			    #    $high=&format_number($high,$fmt,$target,$safeeval);
  582: 			    #    $low =&format_number($low,$fmt,$target,$safeeval);
  583: 			    #}
  584: 			}
  585: 			if ($high && $tag eq 'numericalresponse') {
  586: 			    $element.=' ['.$low.','.$high.']';
  587: 			    $tolline .= "[$low, $high]";
  588: 			}
  589: 			if (defined($sighigh) && $tag eq 'numericalresponse') {
  590: 			    if ($env{'form.answer_output_mode'} eq 'tex') {
  591: 				$element.= " Sig $siglow - $sighigh";
  592: 			    } else {
  593: 				$element.= " Sig <i>$siglow - $sighigh</i>";
  594: 				$sigline .= "[$siglow, $sighigh]";
  595: 			    }
  596: 			}
  597: 			push(@all_answer_info,$element);
  598: 			
  599: 		    } elsif ($target eq 'analyze') {
  600: 			push (@{ $Apache::lonhomework::analyze{"$part_id.answer"}{$name}[$i] }, $element);
  601: 			if ($high) {
  602: 			    push (@{ $Apache::lonhomework::analyze{"$part_id.ans_high"}{$name}[$i] }, $high);
  603: 			    push (@{ $Apache::lonhomework::analyze{"$part_id.ans_low"}{$name}[$i] }, $low);
  604: 			}
  605: 			if ($fmt) {
  606: 			    push (@{ $Apache::lonhomework::analyze{"$part_id.format"}{$name}[$i] }, $fmt);
  607: 			}
  608: 		    }
  609: 		}
  610: 		if ($target eq 'answer') {
  611: 		    $result.= &Apache::response::answer_part($tag,join(', ',@all_answer_info));
  612: 		}
  613: 	    }
  614: 
  615: 	    my @fmt_ans;
  616: 	    for(my $i=0;$i<=$#answers;$i++) {
  617: 		my $ans=$answers[$i];
  618: 		my $fmt=$formats[0];
  619: 		if (@formats && $#formats) {$fmt=$formats[$i];}
  620: 		foreach my $element (@$ans) {		    
  621: 		    if ($fmt && $tag eq 'numericalresponse') {
  622: 			$fmt=~s/e/E/g;
  623: 			if ($unit=~/\$/) { $fmt="\$".$fmt; $unit=~s/\$//g; }
  624: 			if ($unit=~/\,/) { $fmt="\,".$fmt; $unit=~s/\,//g; }
  625: 			$element = &format_number($element,$fmt,$target,
  626: 						  $safeeval);
  627: 			if ($fmt=~/\$/ && $unit!~/\$/) { $element=~s/\$//; }
  628: 		    }
  629: 		}
  630: 		push(@fmt_ans,join(',',@$ans));
  631: 	    }
  632: 	    my $response=\@fmt_ans;
  633: 
  634: 	    my $hideunit=&Apache::lonnet::EXT('resource.'.$partid.'_'.
  635: 					      $id.'.turnoffunit');
  636: 	    if ($unit ne ''  && 
  637: 		! ($Apache::lonhomework::type eq 'exam' ||
  638: 		   lc($hideunit) eq "yes") )  {
  639: 		my $cleanunit=$unit;
  640: 		$cleanunit=~s/\$\,//g;
  641: 		foreach my $ans (@fmt_ans) {
  642: 		    $ans.=" $cleanunit";
  643: 		}
  644: 	    }
  645: 	    my ($ad,$msg)=&check_submission($response,$partid,$id,$tag,
  646: 					    $parstack,$safeeval);
  647: 	    if ($ad ne 'EXACT_ANS' && $ad ne 'APPROX_ANS') {
  648: 		my $error;
  649: 		if ($tag eq 'formularesponse') {
  650: 		    $error=&mt('Computer\'s answer is incorrect ("[_1]").',join(', ',@$response));
  651: 		} else {
  652: 		    # answer failed check if it is sig figs that is failing
  653: 		    my ($ad,$msg)=&check_submission($response,$partid,$id,
  654: 						    $tag,$parstack,
  655: 						    $safeeval,1);
  656: 		    if ($sigline ne '') {
  657: 			$error=&mt('Computer\'s answer is incorrect ("[_1]"). It is likely that the tolerance range [_2] or significant figures [_3] need to be adjusted.',join(', ',@$response),$tolline,$sigline);
  658: 		    } else {
  659: 			$error=&mt('Computer\'s answer is incorrect ("[_1]"). It is likely that the tolerance range [_2] needs to be adjusted.',join(', ',@$response),$tolline);
  660: 		    }
  661: 		}
  662: 		if ($ad ne 'EXACT_ANS' && $ad ne 'APPROX_ANS') {
  663: 		    &Apache::lonxml::error($error);
  664: 		} else {
  665: 		    &Apache::lonxml::warning($error);
  666: 		}
  667: 	    }
  668: 
  669: 	    if (defined($unit) and ($unit ne '') and
  670: 		$tag eq 'numericalresponse') {
  671: 		if ($target eq 'answer') {
  672: 		    if ($env{'form.answer_output_mode'} eq 'tex') {
  673: 			$result.=&Apache::response::answer_part($tag,
  674: 								" Unit: $unit ");
  675: 		    } else {
  676: 			$result.=&Apache::response::answer_part($tag,
  677: 								"Unit: <b>$unit</b>");
  678: 		    }
  679: 		} elsif ($target eq 'analyze') {
  680: 		    push (@{ $Apache::lonhomework::analyze{"$part_id.unit"} }, $unit);
  681: 		}
  682: 	    }
  683: 	    if ($tag eq 'formularesponse' && $target eq 'answer') {
  684: 		my $samples=&Apache::lonxml::get_param('samples',$parstack,$safeeval);
  685: 		$result.=&Apache::response::answer_part($tag,$samples);
  686: 	    }
  687: 	    $result.=&Apache::response::next_answer($tag,$name);
  688: 	}
  689: 	if ($target eq 'answer') {
  690: 	    $result.=&Apache::response::answer_footer($tag);
  691: 	}
  692:     }
  693:     if ($target eq 'grade' || $target eq 'web' || $target eq 'answer' || 
  694: 	$target eq 'tex' || $target eq 'analyze') {
  695: 	&Apache::lonxml::increment_counter($increment);
  696:     }
  697:     &Apache::response::end_response();
  698:     return $result;
  699: }
  700: 
  701: sub check_for_answer_errors {
  702:     my ($parstack,$safeeval) = @_;
  703:     &add_in_tag_answer($parstack,$safeeval);
  704:     my %counts;
  705:     foreach my $name (keys(%answer)) {
  706: 	push(@{$counts{scalar(@{$answer{$name}{'answers'}})}},$name);
  707:     }
  708:     if (scalar(keys(%counts)) > 1) {
  709: 	my $counts = join(' ',map {
  710: 	    my $count = $_;
  711: 	    &mt("Answers [_1] had [_2] components.",
  712: 		'<tt>'.join(', ',@{$counts{$count}}).'</tt>',
  713: 		$count);
  714: 	} (sort(keys(%counts))));
  715: 	&Apache::lonxml::error(&mt("All answers must have the same number of components. Varying numbers of answers were seen. ").$counts);
  716:     }
  717:     use Data::Dumper;
  718:     &Apache::lonxml::debug("count dump is ".&Dumper(\%counts));
  719:     my $expected_number_of_inputs = (keys(%counts))[0];
  720:     if ( $expected_number_of_inputs != scalar(@Apache::inputtags::inputlist)) {
  721: 	&Apache::lonxml::error(&mt("Expected [_1] input fields, but there were only [_2] seen.", 
  722: 				   $expected_number_of_inputs,
  723: 				   scalar(@Apache::inputtags::inputlist)));
  724:     }
  725: }
  726: 
  727: sub get_table_sizes {
  728:     my ($number_of_bubbles,$rbubble_values)=@_;
  729:     my $scale=2; #mm for one digit
  730:     my $cell_width=0;
  731:     foreach my $member (@$rbubble_values) {
  732: 	my $cell_width_real=0;
  733: 	if ($member=~/(\+|-)?(\d*)\.?(\d*)\s*\$?\\times\s*10\^{(\+|-)?(\d+)}\$?/) {
  734: 	    $cell_width_real=(length($2)+length($3)+length($5)+7)*$scale;
  735: 	} elsif ($member=~/(\d*)\.?(\d*)(E|e)(\+|-)?(\d*)/) {
  736: 	    $cell_width_real=(length($1)+length($2)+length($5)+9)*$scale;
  737:         } elsif ($member=~/(\d*)\.(\d*)/) {
  738: 	    $cell_width_real=(length($1)+length($2)+3)*$scale;
  739: 	} else {
  740: 	    $cell_width_real=(length($member)+1)*$scale*0.9;
  741: 	}
  742: 	if ($cell_width_real>$cell_width) {$cell_width=$cell_width_real;}
  743:     }
  744:     $cell_width+=8; 
  745:     my $textwidth;
  746:     if ($env{'form.textwidth'} ne '') {
  747: 	$env{'form.textwidth'}=~/(\d*)\.?(\d*)/;
  748: 	$textwidth=$1.'.'.$2;
  749:     } else {
  750: 	$env{'form.textwidth'}=~/(\d+)\.?(\d*)/;
  751: 	$textwidth=$1.'.'.$2;
  752:     }
  753:     my $bubbles_per_line=int($textwidth/$cell_width);
  754:     if ($bubbles_per_line > $number_of_bubbles) {
  755: 	$bubbles_per_line=$number_of_bubbles;
  756:     }elsif (($bubbles_per_line > $number_of_bubbles/2) && ($number_of_bubbles % 2==0)) {$bubbles_per_line=$number_of_bubbles/2;}
  757:     my $number_of_tables = int($number_of_bubbles/$bubbles_per_line);
  758:     my @table_range = ();
  759:     for (my $i=0;$i<$number_of_tables;$i++) {push @table_range,$bubbles_per_line;}
  760:     if ($number_of_bubbles % $bubbles_per_line) {
  761: 	$number_of_tables++;
  762: 	push @table_range,($number_of_bubbles % $bubbles_per_line);
  763:     }
  764:     $cell_width-=8;
  765:     $cell_width=$cell_width*3/4;
  766:     return ($cell_width,$number_of_tables,@table_range);
  767: }
  768: 
  769: sub format_number {
  770:     my ($number,$format,$target,$safeeval)=@_;
  771:     my $ans;
  772:     if ($format eq '') {
  773: 	#What is the number? (integer,decimal,floating point)
  774: 	if ($number=~/^(\d*\.?\d*)(E|e)[+\-]?(\d*)$/) {
  775: 	    $format = '3e';
  776: 	} elsif ($number=~/^(\d*)\.(\d*)$/) {
  777: 	    $format = '4f';
  778: 	} elsif ($number=~/^(\d*)$/) {
  779: 	    $format = 'd';
  780: 	}
  781:     }
  782:     if (!$Apache::lonxml::default_homework_loaded) {
  783: 	&Apache::lonxml::default_homework_load($safeeval);
  784:     }
  785:     $ans=&Apache::run::run("&prettyprint(q\0$number\0,q\0$format\0,q\0$target\0)",$safeeval);
  786:     return $ans;
  787: }
  788: 
  789: sub make_numerical_bubbles {
  790:     my ($part,$id,$target,$parstack,$safeeval) =@_;
  791:     
  792:     my $number_of_bubbles = 
  793: 	&Apache::response::get_response_param($part.'_'.$id,'numbubbles',8);
  794: 
  795:     my ($format)=&Apache::lonxml::get_param_var('format',$parstack,$safeeval);
  796:     my $name = (exists($answer{$tag_internal_answer_name}) 
  797: 		? $tag_internal_answer_name
  798: 		: (sort(keys(%answer)))[0]);
  799: 
  800:     if ( scalar(@{$answer{$name}{'answers'}}) > 1) {
  801: 	&Apache::lonxml::error("Only answers with 1 component are supported in exam mode");
  802:     }
  803:     if (scalar(@{$answer{$name}{'answers'}[0]}) > 1) {
  804: 	&Apache::lonxml::error("Vector answers are unsupported in exam mode.");
  805:     }
  806: 
  807:     my $answer = $answer{$name}{'answers'}[0][0];
  808:     my (@incorrect)=&Apache::lonxml::get_param_var('incorrect',$parstack,
  809: 						   $safeeval);
  810:     if ($#incorrect eq 0) { @incorrect=(split(/,/,$incorrect[0])); }
  811:     
  812:     my @bubble_values=();
  813:     my @alphabet=('A'..'Z');
  814: 
  815:     &Apache::lonxml::debug("answer is $answer incorrect is @incorrect");
  816:     my @oldseed=&Math::Random::random_get_seed();
  817:     if (@incorrect) {
  818: 	&Apache::lonxml::debug("inside ".(scalar(@incorrect)+1 gt $number_of_bubbles));
  819: 	if (defined($incorrect[0]) &&
  820: 	    scalar(@incorrect)+1 >= $number_of_bubbles) {
  821: 	    &Apache::lonxml::debug("inside ".(scalar(@incorrect)+1).":$number_of_bubbles");
  822: 	    &Apache::response::setrandomnumber();
  823: 	    my @rand_inc=&Math::Random::random_permutation(@incorrect);
  824: 	    @bubble_values=@rand_inc[0..($number_of_bubbles-2)];
  825: 	    @bubble_values=sort {$a <=> $b} (@bubble_values,$answer);
  826: 	    &Apache::lonxml::debug("Answer was :$answer: returning :".$#bubble_values.": which are :".join(':',@bubble_values));
  827: 	    &Math::Random::random_set_seed(@oldseed);
  828: 
  829: 	    my $correct;
  830: 	    for(my $i=0; $i<=$#bubble_values;$i++) {
  831: 		if ($bubble_values[$i] eq $answer) {
  832: 		    $correct = $alphabet[$i];
  833: 		    last;
  834: 		}
  835: 	    }
  836: 
  837: 	    if (defined($format) && $format ne '') {
  838: 		my @bubble_display;
  839: 		foreach my $value (@bubble_values) {
  840: 		    push(@bubble_display,
  841: 			 &format_number($value,$format,$target,$safeeval));
  842: 		}
  843: 		return (\@bubble_values,\@bubble_display,$correct);
  844: 	    } else {
  845: 		return (\@bubble_values,\@bubble_values,$correct);
  846: 	    }
  847: 	}
  848: 	if (defined($incorrect[0]) &&
  849: 	    scalar(@incorrect)+1 < $number_of_bubbles) {
  850: 	    &Apache::lonxml::warning("Not enough incorrect answers were specified in the incorrect array, ignoring the specified incorrect answers and instead generating them (".join(',',@incorrect).").");
  851: 	}
  852:     }
  853:     my @factors = (1.13,1.17,1.25,1.33,1.45); #default values of factors
  854:     my @powers = (1..$number_of_bubbles);
  855:     &Apache::response::setrandomnumber();
  856:     my $ind=&Math::Random::random_uniform_integer(1,0,$#powers);
  857:     my $power = $powers[$ind];
  858:     $ind=&Math::Random::random_uniform_integer(1,0,$#factors);
  859:     my $factor = $factors[$ind];
  860:     my @bubble_display;
  861:     for ($ind=0;$ind<$number_of_bubbles;$ind++) {
  862: 	$bubble_values[$ind] = $answer*($factor**($power-$powers[$#powers-$ind]));
  863: 	$bubble_display[$ind] = &format_number($bubble_values[$ind],
  864: 					       $format,$target,$safeeval);
  865: 
  866:     }
  867:     my $correct = $alphabet[$number_of_bubbles-$power];
  868:     &Math::Random::random_set_seed(@oldseed);
  869:     return (\@bubble_values,\@bubble_display,$correct);
  870: }
  871: 
  872: sub get_tolrange {
  873:     my ($ans,$tol)=@_;
  874:     my ($high,$low);
  875:     if ($tol =~ /%$/) {
  876: 	chop($tol);
  877: 	my $change=$ans*($tol/100.0);
  878: 	$high=$ans+$change;
  879: 	$low=$ans-$change;
  880:     } else {
  881: 	$high=$ans+$tol;
  882: 	$low=$ans-$tol;
  883:     }
  884:     return ($high,$low);
  885: }
  886: 
  887: sub get_sigrange {
  888:     my ($sig)=@_;
  889:     #&Apache::lonxml::debug("Got a sig of :$sig:");
  890:     my $courseid=$env{'request.course.id'};
  891:     if (lc($env{"course.$courseid.disablesigfigs"}) eq 'yes') {
  892: 	return (15,0);
  893:     }
  894:     my $sig_lbound;
  895:     my $sig_ubound;
  896:     if ($sig eq '') {
  897: 	$sig_lbound = 0; #SIG_LB_DEFAULT
  898: 	$sig_ubound =15; #SIG_UB_DEFAULT
  899:     } else {
  900: 	($sig_lbound,$sig_ubound) = split(/,/,$sig);
  901: 	if (!defined($sig_lbound)) {
  902: 	    $sig_lbound = 0; #SIG_LB_DEFAULT
  903: 	    $sig_ubound =15; #SIG_UB_DEFAULT
  904: 	}
  905: 	if (!defined($sig_ubound)) { $sig_ubound=$sig_lbound; }
  906:     }
  907:     if (($sig_ubound<$sig_lbound) ||
  908: 	($sig_lbound > 15) ||
  909: 	($sig =~/(\+|-)/ ) ) {
  910: 	my $errormsg=&mt("Invalid Significant figures detected")." ($sig)";
  911: 	if ($env{'request.state'} eq 'construct') {
  912: 	    $errormsg.=
  913: 		&Apache::loncommon::help_open_topic('Significant_Figures');
  914: 	}
  915: 	&Apache::lonxml::error($errormsg);
  916:     }
  917:     return ($sig_ubound,$sig_lbound);
  918: }
  919: 
  920: sub start_stringresponse {
  921:     my ($target,$token,$tagstack,$parstack,$parser,$safeeval,$style)=@_;
  922:     my $result;
  923:     my $id = &Apache::response::start_response($parstack,$safeeval);
  924:     if ($target eq 'meta') {
  925: 	$result=&Apache::response::meta_package_write('stringresponse');
  926:     } elsif ($target eq 'edit') {
  927: 	$result.=&Apache::edit::tag_start($target,$token);
  928: 	$result.=&Apache::edit::text_arg('Answer:','answer',$token);
  929: 	$result.=&Apache::edit::select_arg('Type:','type',
  930: 			 [['cs','Case Sensitive'],['ci','Case Insensitive'],
  931: 			  ['mc','Case Insensitive, Any Order'],
  932: 			  ['re','Regular Expression']],$token);
  933: 	$result.=&Apache::edit::text_arg('String to display for answer:',
  934: 					 'answerdisplay',$token);
  935: 	$result.=&Apache::edit::end_row().&Apache::edit::start_spanning_row();
  936:     } elsif ($target eq 'modified') {
  937: 	my $constructtag;
  938: 	$constructtag=&Apache::edit::get_new_args($token,$parstack,
  939: 						  $safeeval,'answer',
  940: 						  'type','answerdisplay');
  941: 	if ($constructtag) {
  942: 	    $result = &Apache::edit::rebuild_tag($token);
  943: 	    $result.=&Apache::edit::handle_insert();
  944: 	}
  945:     } elsif ($target eq 'web') {
  946: 	if (  &Apache::response::show_answer() ) {
  947: 	    my $answer=
  948: 	       &Apache::lonxml::get_param('answerdisplay',$parstack,$safeeval);
  949: 	    if (!defined $answer || $answer eq '') {
  950: 		$answer=
  951: 		    &Apache::lonxml::get_param('answer',$parstack,$safeeval);
  952: 	    }
  953: 	    $Apache::inputtags::answertxt{$id}=[$answer];
  954: 	} 
  955:     } elsif ($target eq 'answer' || $target eq 'grade') {
  956: 	&Apache::response::reset_params();
  957:     }
  958:     return $result;
  959: }
  960: 
  961: sub end_stringresponse {
  962:     my ($target,$token,$tagstack,$parstack,$parser,$safeeval,$style)=@_;
  963: 
  964:     my $result = '';
  965:     my $part=$Apache::inputtags::part;
  966:     my $id=$Apache::inputtags::response[-1];
  967:     my $answer=&Apache::lonxml::get_param('answer',$parstack,$safeeval);
  968:     my $type=&Apache::lonxml::get_param('type',$parstack,$safeeval);
  969:     my $answerdisplay=&Apache::lonxml::get_param('answerdisplay',$parstack,$safeeval);
  970:     &Apache::lonxml::debug("current $answer ".$token->[2]);
  971:     if (!$Apache::lonxml::default_homework_loaded) {
  972: 	&Apache::lonxml::default_homework_load($safeeval);
  973:     }
  974:     if ( $target eq 'grade' && &Apache::response::submitted() ) {
  975: 	&Apache::response::setup_params('stringresponse',$safeeval);
  976: 	$safeeval->share_from('capa',['&caparesponse_capa_check_answer']);
  977: 	if ($Apache::lonhomework::type eq 'exam' ||
  978: 	    &Apache::response::submitted('scantron')) {
  979: 	    &Apache::response::scored_response($part,$id);
  980: 
  981: 	} else {
  982: 	    my $response = &Apache::response::getresponse();
  983: 	    if ( $response =~ /[^\s]/) {
  984: 		my %previous = &Apache::response::check_for_previous($response,
  985: 								    $part,$id);
  986: 		&Apache::lonxml::debug("submitted a $response<br>\n");
  987: 		&Apache::lonxml::debug($$parstack[-1] . "\n<br>");
  988: 		$Apache::lonhomework::results{"resource.$part.$id.submission"}=
  989: 		    $response;
  990: 		my ($ad,$msg);
  991: 		if ($type eq 're' ) { 
  992: 		    # if the RE wasn't in a var it likely got munged,
  993:                     # thus grab it from the var directly
  994: #		    my $testans=$token->[2]->{'answer'};
  995: #		    if ($testans !~ m/^\s*\$/) {
  996: #			$answer=$token->[2]->{'answer'};
  997: #		    }
  998: 		    ${$safeeval->varglob('LONCAPA::response')}=$response;
  999: 		    $result = &Apache::run::run('if ($LONCAPA::response=~m'.$answer.') { return 1; } else { return 0; }',$safeeval);
 1000: 		    &Apache::lonxml::debug("current $response");
 1001: 		    &Apache::lonxml::debug("current $answer");
 1002: 		    $ad = ($result) ? 'APPROX_ANS' : 'INCORRECT';
 1003: 		} else {
 1004: 		    my @args = ('type');
 1005: 		    my $args_ref = &setup_capa_args($safeeval,$parstack,
 1006: 						    \@args,$response);
 1007: 
 1008: 		    &add_in_tag_answer($parstack,$safeeval);
 1009: 		    my (@final_awards,@final_msgs,@names);
 1010: 		    foreach my $name (keys(%answer)) {
 1011: 			&Apache::lonxml::debug(" doing $name with ".join(':',@{ $answer{$name}{'answers'} }));
 1012: 			${$safeeval->varglob('LONCAPA::CAPAresponse_answer')}=dclone($answer{$name});
 1013: 			my ($result, @msgs)=&Apache::run::run("&caparesponse_check_list()",$safeeval);
 1014: 			&Apache::lonxml::debug('msgs are'.join(':',@msgs));
 1015: 			my ($awards)=split(/:/,$result);
 1016: 			my (@awards) = split(/,/,$awards);
 1017: 			($ad,$msg) = 
 1018: 			    &Apache::inputtags::finalizeawards(\@awards,\@msgs);
 1019: 			push(@final_awards,$ad);
 1020: 			push(@final_msgs,$msg);
 1021: 			push(@names,$name);
 1022: 			&Apache::lonxml::debug("\n<br>result:$result:$Apache::lonxml::curdepth<br>\n");
 1023: 		    }
 1024: 		    my ($ad, $msg, $name) = 
 1025: 			&Apache::inputtags::finalizeawards(\@final_awards,
 1026: 							   \@final_msgs,
 1027: 							   \@names,1);
 1028: 		}
 1029: 		if ($Apache::lonhomework::type eq 'survey' &&
 1030: 		    ($ad eq 'INCORRECT' || $ad eq 'APPROX_ANS' ||
 1031: 		     $ad eq 'EXACT_ANS')) {
 1032: 		    $ad='SUBMITTED';
 1033: 		}
 1034: 		&Apache::response::handle_previous(\%previous,$ad);
 1035: 		$Apache::lonhomework::results{"resource.$part.$id.awarddetail"}=$ad;
 1036: 		$Apache::lonhomework::results{"resource.$part.$id.awardmsg"}=$msg;
 1037: 	    }
 1038: 	}
 1039:     } elsif ($target eq 'answer' || $target eq 'analyze') {
 1040: 	&add_in_tag_answer($parstack,$safeeval);
 1041: 	if ($target eq 'analyze') {
 1042: 	    push (@{ $Apache::lonhomework::analyze{"parts"} },"$part.$id");
 1043: 	    $Apache::lonhomework::analyze{"$part.$id.type"} = 'stringresponse';
 1044: 	    &Apache::response::check_if_computed($token,$parstack,$safeeval,
 1045: 						 'answer');
 1046: 	}
 1047: 	&Apache::response::setup_params('stringresponse',$safeeval);
 1048: 	if ($target eq 'answer') {
 1049: 	    $result.=&Apache::response::answer_header('stringresponse');
 1050: 	}
 1051: 	foreach my $name (keys(%answer)) {
 1052: 	    my @answers = @{ $answer{$name}{'answers'} };
 1053: 	    for (my $i=0;$i<=$#answers;$i++) {
 1054: 		my $answer_part = $answers[$i];
 1055: 		foreach my $element (@{$answer_part}) {
 1056: 		    if ($target eq 'answer') {
 1057: 			$result.=&Apache::response::answer_part('stringresponse',
 1058: 								$element);
 1059: 		    } elsif ($target eq 'analyze') {
 1060: 			push (@{ $Apache::lonhomework::analyze{"$part.$id.answer"}{$name}[$i] },
 1061: 			      $element);
 1062: 		    }
 1063: 		}
 1064: 		if ($target eq 'answer' && $type eq 're') {
 1065: 		    $result.=&Apache::response::answer_part('stringresponse',
 1066: 							    $answerdisplay);
 1067: 		}
 1068: 	    }
 1069: 	}
 1070: 	my $string='Case Insensitive';
 1071: 	if ($type eq 'mc') {
 1072: 	    $string='Multiple Choice';
 1073: 	} elsif ($type eq 'cs') {
 1074: 	    $string='Case Sensitive';
 1075: 	} elsif ($type eq 'ci') {
 1076: 	    $string='Case Insensitive';
 1077: 	} elsif ($type eq 're') {
 1078: 	    $string='Regular Expression';
 1079: 	}
 1080: 	if ($target eq 'answer') {
 1081: 	    if ($env{'form.answer_output_mode'} eq 'tex') {
 1082: 		$result.=&Apache::response::answer_part('stringresponse',
 1083: 							"$string");
 1084: 	    } else {
 1085: 		$result.=&Apache::response::answer_part('stringresponse',
 1086: 							"<b>$string</b>");
 1087: 	    }
 1088: 	} elsif ($target eq 'analyze') {
 1089: 	    push (@{$Apache::lonhomework::analyze{"$part.$id.str_type"}},
 1090: 		  $type);
 1091: 	}
 1092: 	if ($target eq 'answer') {
 1093: 	    $result.=&Apache::response::answer_footer('stringresponse');
 1094: 	}
 1095:     } elsif ($target eq 'edit') {
 1096: 	$result.='</td></tr>'.&Apache::edit::end_table;
 1097:     }
 1098:     if ($target eq 'grade' || $target eq 'web' || $target eq 'answer' || 
 1099: 	$target eq 'tex' || $target eq 'analyze') {
 1100: 	&Apache::lonxml::increment_counter(&Apache::response::repetition());
 1101:     }
 1102:     &Apache::response::end_response;
 1103:     return $result;
 1104: }
 1105: 
 1106: sub start_formularesponse {
 1107:     my ($target,$token,$tagstack,$parstack,$parser,$safeeval,$style)=@_;
 1108:     my $result;
 1109:     if ($target eq 'meta') {
 1110: 	&Apache::response::start_response($parstack,$safeeval);
 1111: 	$result=&Apache::response::meta_package_write('formularesponse');
 1112: 	&Apache::response::end_response();
 1113:     } else {
 1114: 	$result.=&start_numericalresponse(@_);
 1115:     }
 1116:     return $result;
 1117: }
 1118: 
 1119: sub end_formularesponse {
 1120:     return end_numericalresponse(@_);
 1121: }
 1122: 
 1123: 1;
 1124: __END__
 1125: 

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