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version 1.21, 2000/12/19 23:22:22 version 1.134, 2004/02/23 20:57:50
Line 1 Line 1
 # The LearningOnline Network with CAPA  # The LearningOnline Network with CAPA
 # caparesponse definition  # caparesponse definition
   #
   # $Id$
   #
   # Copyright Michigan State University Board of Trustees
   #
   # This file is part of the LearningOnline Network with CAPA (LON-CAPA).
   #
   # LON-CAPA is free software; you can redistribute it and/or modify
   # it under the terms of the GNU General Public License as published by
   # the Free Software Foundation; either version 2 of the License, or
   # (at your option) any later version.
   #
   # LON-CAPA is distributed in the hope that it will be useful,
   # but WITHOUT ANY WARRANTY; without even the implied warranty of
   # MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
   # GNU General Public License for more details.
   #
   # You should have received a copy of the GNU General Public License
   # along with LON-CAPA; if not, write to the Free Software
   # Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA  02111-1307  USA
   #
   # /home/httpd/html/adm/gpl.txt
   #
   # http://www.lon-capa.org/
   #
   
 package Apache::caparesponse;  package Apache::caparesponse;
 use strict;  use strict;
 use capa;  use capa;
   use Apache::lonlocal;
   
 sub BEGIN {  BEGIN {
   &Apache::lonxml::register('Apache::caparesponse',('caparesponse','numericalresponse'));      &Apache::lonxml::register('Apache::caparesponse',('caparesponse','numericalresponse','stringresponse','formularesponse'));
 }  
   
 $Apache::caparesponse::result='';  
 sub start_caparesponse {  
   my ($target,$token,$parstack,$parser,$safeeval)=@_;  
   my $id = &Apache::response::start_response($parstack,$safeeval);  
   return '';  
 }  
   
 sub end_caparesponse {  
   my ($target,$token,$parstack,$parser,$safeeval,$style)=@_;  
   my $result = '';  
   if ( $target eq 'grade' ) {  
     if ( defined $ENV{'form.submit'}) {  
       $Apache::caparesponse::result='';  
       $safeeval->share_from('capa',['&caparesponse_capa_check_answer']);  
       my $response = $ENV{'form.HWVAL'.$Apache::inputtags::response['-1']};  
       if ( $response =~ /[^\s]/) {  
  #check_for_previous($response,$id,$response);  
  $Apache::lonhomework::results{"resource.$Apache::inputtags::part.$Apache::inputtags::response['-1'].submission"}=$response;  
  &Apache::lonxml::debug("submitted a $response<br>\n");  
  &Apache::lonxml::debug($$parstack[$#$parstack] . "\n<br>");  
  my $expression="&caparesponse_check('".$response."','".  
   $$parstack[$#$parstack].  
     ';my $tol="'.$Apache::inputtags::params{'tol'}.'"'.  
       ';my $sig="'.$Apache::inputtags::params{'sig'}.'"'.  
  "');";  
  $result = &Apache::run::run($expression,$safeeval);  
  my ($ad) = split /:/ , $result;  
  $Apache::lonhomework::results{"resource.$Apache::inputtags::part.$Apache::inputtags::response['-1'].awarddetail"}=$ad;  
  &Apache::lonxml::debug("$expression");  
  &Apache::lonxml::debug("\n<br>result:$Apache::caparesponse::result:$result:$Apache::lonxml::curdepth<br>\n");  
       }  
     }  
   } else {  
     #$result .= "The correct answer is ".&Apache::run::run("{$$parstack['-1'];".'return $answer}',$safeeval)."\n";  
   }  
   #Apache::lonxml::debug("\n<br>\nreal end caparesponse<br>\n");  
   &Apache::response::end_response;  
   return $result;  
 }  }
   
 sub start_numericalresponse {  sub start_numericalresponse {
       my ($target,$token,$tagstack,$parstack,$parser,$safeeval)=@_;
       my $id = &Apache::response::start_response($parstack,$safeeval);
       my $result;
       if ($target eq 'edit') {
    $result.=&Apache::edit::tag_start($target,$token);
    $result.=&Apache::edit::text_arg('Answer:','answer',$token);
    if ($token->[1] eq 'numericalresponse') {
       $result.=&Apache::edit::text_arg('Incorrect Answers:','incorrect',
        $token);
       $result.=&Apache::edit::text_arg('Unit:','unit',$token,5).
    &Apache::loncommon::help_open_topic('Physical_Units');
       $result.=&Apache::edit::text_arg('Format:','format',$token,4).
    &Apache::loncommon::help_open_topic('Numerical_Response_Format');
    } elsif ($token->[1] eq 'formularesponse') {
       $result.=&Apache::edit::text_arg('Sample Points:','samples',
        $token,40).
         &Apache::loncommon::help_open_topic('Formula_Response_Sampling');
    }
    $result.=&Apache::edit::end_row().&Apache::edit::start_spanning_row();
       } elsif ($target eq 'modified') {
    my $constructtag;
    if ($token->[1] eq 'numericalresponse') {
       $constructtag=&Apache::edit::get_new_args($token,$parstack,
         $safeeval,'answer',
         'incorrect','unit',
         'format');
    } elsif ($token->[1] eq 'formularesponse') {
       $constructtag=&Apache::edit::get_new_args($token,$parstack,
         $safeeval,'answer',
         'samples');
    }
    if ($constructtag) {
       $result = &Apache::edit::rebuild_tag($token);
       $result.=&Apache::edit::handle_insert();
    }
       } elsif ($target eq 'meta') {
    $result=&Apache::response::meta_package_write('numericalresponse');
       } elsif ($target eq 'answer' || $target eq 'grade') {
    &Apache::response::reset_params();
       } elsif ($target eq 'web') {
    my $partid = $Apache::inputtags::part;
    my $hideunit=&Apache::lonnet::EXT('resource.'.$partid.'_'.$id.'.turnoffunit');
    &Apache::lonxml::debug("Got unit $hideunit for $partid $id");
    #no way to enter units, with radio buttons
    if (lc($hideunit) eq "yes") {
       my $unit=&Apache::lonxml::get_param_var('unit',$parstack,
       $safeeval);
       if ($unit =~ /\S/) { $result.=" (in $unit) "; }
    }
       }
       return $result;
 }  }
   
 sub end_numericalresponse {  sub end_numericalresponse {
       my ($target,$token,$tagstack,$parstack,$parser,$safeeval,$style)=@_;
       my $increment=1;
       my $result = '';
       if (!$Apache::lonxml::default_homework_loaded) {
    &Apache::lonxml::default_homework_load($safeeval);
       }
       my $tag;
       if (scalar(@$tagstack)) { $tag=$$tagstack[-1]; }
       if ( $target eq 'grade' && defined($ENV{'form.submitted'})) {
    &Apache::response::setup_params($tag);
    $safeeval->share_from('capa',['&caparesponse_capa_check_answer']);
    my $partid = $Apache::inputtags::part;
    my $id = $Apache::inputtags::response['-1'];
    if ($Apache::lonhomework::type eq 'exam' && 
       $tag eq 'formularesponse') {
       $increment=&Apache::response::scored_response($partid,$id);
    } else {
       my $response = &Apache::response::getresponse();
       if ( $response =~ /[^\s]/) {
    my $ad;
    my %previous = &Apache::response::check_for_previous($response,$partid,$id);
    &Apache::lonxml::debug("submitted a $response<br>\n");
    &Apache::lonxml::debug($$parstack[-1] . "\n<br>");
   
    if ($ENV{'form.submitted'} eq 'scantron') {
       my $number_of_bubbles = &Apache::lonnet::EXT('resource.'.$partid.'_'.$id.'.numbubbles');
       if (!$number_of_bubbles) { $number_of_bubbles=8; }
       my (@formats)=&Apache::lonxml::get_param_var('format',$parstack,$safeeval);
       my (@answers)=&Apache::lonxml::get_param_var('answer',$parstack,$safeeval);
       my (@incorrect)=&Apache::lonxml::get_param_var('incorrect',$parstack,$safeeval);
       my @values=&make_numerical_bubbles($number_of_bubbles,$target,$answers[0],$formats[0],\@incorrect);
       $response=$values[$response];
    } else {
       $response =~ s/\\/\\\\/g;
       $response =~ s/\'/\\\'/g;
    }
    $Apache::lonhomework::results{"resource.$partid.$id.submission"}=$response;
    &Apache::lonxml::debug("current $response");
    my $expression="&caparesponse_check_list('".$response."','".
       $$parstack[-1];
    my $hideunit=&Apache::lonnet::EXT('resource.'.$partid.'_'.$id.'.turnoffunit');
   
    foreach my $key (keys(%Apache::inputtags::params)) {
       $expression.= ';my $'. #'
    $key.'="'.$Apache::inputtags::params{$key}.'"';
    }
   
    #no way to enter units, with radio buttons
    if ($Apache::lonhomework::type eq 'exam' ||
       lc($hideunit) eq "yes") {
       $expression.=';my $unit=undef;';
    }
    #sig fig don't make much sense either
    if (($Apache::lonhomework::type eq 'exam' ||
        $ENV{'form.submitted'} eq 'scantron') &&
       $tag eq 'numericalresponse') {
       $expression.=';my $sig=undef;';
    }
   
    if ($tag eq 'formularesponse') {
       $expression.=';my $type="fml";';
    } elsif ($tag eq 'numericalresponse') {
       $expression.=';my $type="float";';
    }
    $expression.="');";
    my @answer=&Apache::lonxml::get_param_var('answer',$parstack,$safeeval);
    &Apache::lonxml::debug('answer is'.join(':',@answer));
    @{$safeeval->varglob('CAPARESPONSE_CHECK_LIST_answer')}=@answer;
   
    $result = &Apache::run::run($expression,$safeeval);
    my ($awards) = split /:/ , $result;
    ($ad) = &Apache::inputtags::finalizeawards(split /,/ , $awards);
    &Apache::lonxml::debug("$expression");
    &Apache::lonxml::debug("\n<br>result:$result:$Apache::lonxml::curdepth<br>\n");
    &Apache::response::handle_previous(\%previous,$ad);
    $Apache::lonhomework::results{"resource.$partid.$id.awarddetail"}=$ad;
    $result='';
       }
    }
       } elsif ($target eq 'web' || $target eq 'tex') {
    my (@answers)=&Apache::lonxml::get_param_var('answer',$parstack,
        $safeeval);
    my $award = $Apache::lonhomework::history{"resource.$Apache::inputtags::part.solved"};
    my $status = $Apache::inputtags::status['-1'];
    if (  &Apache::response::show_answer() ) {
       my (@formats)=&Apache::lonxml::get_param_var('format',$parstack,
    $safeeval);
       my $unit=&Apache::lonxml::get_param_var('unit',$parstack,
       $safeeval);
       if ($target eq 'web') {
    $result="<br />".&mt('The correct answer is')." ";
       }
       for (my $i=0; $i <= $#answers; $i++) {
    my $answer=$answers[$i];
    my $format;
    if ($#formats > 0) {
       $format=$formats[$i];
    } else {
       $format=$formats[0];
    }
    my $formatted;
    if ((defined($format)) && ($format ne '')) {
       $format=~s/e/E/g;
       &Apache::lonxml::debug("formatting with :$format: answer :$answer:");
       $formatted=sprintf('%.'.$format,$answer).',';
    } else {
       &Apache::lonxml::debug("no format answer :$answer:");
       $formatted="$answer,";
    }
    if ($target eq 'tex') {
       $formatted='';
       #$formatted=&Apache::lonxml::latex_special_symbols($formatted);
    }
    $result.=$formatted;
       }
       chop $result;
       if ($target eq 'web') {
    $result.=" $unit.<br />";
       }
    }
    if ($Apache::lonhomework::type eq 'exam') {
       my $partid=$Apache::inputtags::part;
       my $id=$Apache::inputtags::response[-1];
       my $number_of_bubbles = &Apache::lonnet::EXT('resource.'.$partid.'_'.$id.'.numbubbles');
       if ($Apache::inputtags::params{'numbubbles'}) {
    $number_of_bubbles = $Apache::inputtags::params{'numbubbles'};
       }
       if (!$number_of_bubbles) { $number_of_bubbles=8; }
       
       my (@formats)=&Apache::lonxml::get_param_var('format',$parstack,
    $safeeval);
       my $unit=&Apache::lonxml::get_param_var('unit',$parstack,
       $safeeval);
       my (@incorrect)=&Apache::lonxml::get_param_var('incorrect',$parstack,$safeeval);
       my @bubble_values=&make_numerical_bubbles($number_of_bubbles,
         $target,$answers[0],
         $formats[0],\@incorrect);
       my @alphabet=('A'..'Z');
       if ($target eq 'web') {
    if ($tag eq 'numericalresponse') {
       if ($unit=~/\S/) {$result.=' (in '.$unit.')<br /><br />';}
       $result.= '<table border="1"><tr>';
       my $previous=$Apache::lonhomework::history{"resource.$Apache::inputtags::part.$id.submission"};
       for (my $ind=0;$ind<$number_of_bubbles;$ind++) {
    my $checked='';
    if ($previous eq $bubble_values[$ind]) {
       $checked=" checked='on' ";
    }
    $result.='<td><input type="radio" name="HWVAL_'.$id.
       '" value="'.$bubble_values[$ind].'" '.$checked
       .' /><b>'.$alphabet[$ind].'</b>: '.
       $bubble_values[$ind].'</td>';
       }
       $result.='</tr></table>';
    } elsif ($tag eq 'formularesponse') {
       $result.= '<br /><br /><font color="red">
                              <textarea name="HWVAL_'.$id.'" rows="4" cols="50">
                              </textarea></font> <br /><br />';
    }
       } elsif ($target eq 'tex') {
    if ((defined $unit) and ($unit=~/\S/) and ($Apache::lonhomework::type eq 'exam')) {
       $result.=' \textit{(in} \verb|'.$unit.'|\textit{)} ';
    }
    if ($tag eq 'numericalresponse') {
       my ($celllength,$number_of_tables,@table_range)=
    &get_table_sizes($number_of_bubbles,\@bubble_values);
       my $j=0;
       my $cou=0;
       $result.='\vskip -1 mm \noindent \begin{enumerate}\item[\textbf{'.$Apache::lonxml::counter.'}.]';
       for (my $i=0;$i<$number_of_tables;$i++) {
    $result.='\vskip -1 mm \noindent \begin{tabular}{';
    for (my $ind=0;$ind<$table_range[$j];$ind++) {
       $result.='p{3 mm}p{'.$celllength.' mm}';
    }
    $result.='}';
    for (my $ind=$cou;$ind<$cou+$table_range[$j];$ind++) {
       $result.='\hskip -4 mm {\small \textbf{'.$alphabet[$ind].'}}$\bigcirc$ & \hskip -3 mm {\small '.$bubble_values[$ind].'} ';
       if ($ind != $cou+$table_range[$j]-1) {$result.=' & ';}
    }
    $cou += $table_range[$j];
    $j++;
    $result.='\\\\\end{tabular}\vskip 0 mm ';
       }
       $result.='\end{enumerate}';
    } else {
       $result.='\fbox{\fbox{\parbox{\textwidth-5mm}{\strut\\\\\strut\\\\\strut\\\\\strut\\\\}}}';
       my $repetition = &Apache::response::repetition();
       $result.='\begin{enumerate}';
       for (my $i=0;$i<$repetition;$i++) {
    $result.='\item[\textbf{'.($Apache::lonxml::counter+$i).'}.]\textit{Leave blank on scoring form}\vskip 0 mm';
       }
       $increment=$repetition;
       $result.= '\end{enumerate}';
    }
       }
    }
       } elsif ($target eq 'edit') {
    $result.='</td></tr>'.&Apache::edit::end_table;
       } elsif ($target eq 'answer' || $target eq 'analyze') {
   
    my $part_id="$Apache::inputtags::part.$Apache::inputtags::response[-1]";
    if ($target eq 'analyze') {
       push (@{ $Apache::lonhomework::analyze{"parts"} },$part_id);
       $Apache::lonhomework::analyze{"$part_id.type"} = $tag;
       my (@incorrect)=&Apache::lonxml::get_param_var('incorrect',$parstack,$safeeval);
       push (@{ $Apache::lonhomework::analyze{"$part_id.incorrect"} }, @incorrect);
    }
    if (scalar(@$tagstack)) {
       &Apache::response::setup_params($tag);
    }
    my (@answers)=&Apache::lonxml::get_param_var('answer',$parstack,$safeeval);
    my (@formats)=&Apache::lonxml::get_param_var('format',$parstack,$safeeval);
    my $unit=&Apache::lonxml::get_param_var('unit',$parstack,$safeeval);
    my $type=&Apache::lonxml::get_param('type',$parstack,$safeeval);
   
    if ($target eq 'answer') {
       $result.=&Apache::response::answer_header($tag);
    }
    for(my $i=0;$i<=$#answers;$i++) {
       my $ans=$answers[$i];
       my $fmt=$formats[0];
       if (@formats && $#formats) {$fmt=$formats[$i];}
       my ($high,$low);
       if ($Apache::inputtags::params{'tol'}) {
    ($high,$low)=&get_tolrange($ans,$Apache::inputtags::params{'tol'});
       }
       my ($sighigh,$siglow);
       if ($Apache::inputtags::params{'sig'}) {
    ($sighigh,$siglow)=&get_sigrange($Apache::inputtags::params{'sig'});
       }
       if ($fmt && $tag eq 'numericalresponse') {
    $fmt=~s/e/E/g;
    $ans = sprintf('%.'.$fmt,$ans);
    if ($high) {
       $high=sprintf('%.'.$fmt,$high);
       $low =sprintf('%.'.$fmt,$low);
    }
       }
       if ($target eq 'answer') {
    if ($high && $tag eq 'numericalresponse') { $ans.=' ['.$low.','.$high.']'; }
    if ($sighigh && $tag eq 'numericalresponse') {
       if ($ENV{'form.answer_output_mode'} eq 'tex') {
    $ans.= " Sig $siglow - $sighigh";
       } else {
    $ans.= " Sig <i>$siglow - $sighigh</i>";
       }
    }
    $result.=&Apache::response::answer_part($tag,$ans);
       } elsif ($target eq 'analyze') {
    push (@{ $Apache::lonhomework::analyze{"$part_id.answer"} }, $ans);
    if ($high) {
       push (@{ $Apache::lonhomework::analyze{"$part_id.ans_high"} }, $high);
       push (@{ $Apache::lonhomework::analyze{"$part_id.ans_low"} }, $low);
    }
       }
    }
    if (defined($unit) and ($unit ne '') and
       $tag eq 'numericalresponse') {
       if ($target eq 'answer') {
    if ($ENV{'form.answer_output_mode'} eq 'tex') {
       $result.=&Apache::response::answer_part($tag,
       " Unit: $unit ");
    } else {
       $result.=&Apache::response::answer_part($tag,
       "Unit: <b>$unit</b>");
    }
       } elsif ($target eq 'analyze') {
    push (@{ $Apache::lonhomework::analyze{"$part_id.unit"} }, $unit);
       }
    }
    if ($tag eq 'formularesponse' && $target eq 'answer') {
       my $samples=&Apache::lonxml::get_param('samples',$parstack,$safeeval);
       $result.=&Apache::response::answer_part($tag,$samples);
    }
    if ($target eq 'answer') {
       $result.=&Apache::response::answer_footer($tag);
    }
       }
       if ($target eq 'grade' || $target eq 'web' || $target eq 'answer' || 
    $target eq 'tex' || $target eq 'analyze') {
    &Apache::lonxml::increment_counter($increment);
       }
       &Apache::response::end_response;
       return $result;
   }
   
   sub get_table_sizes {
       my ($number_of_bubbles,$rbubble_values)=@_;
       my $scale=2; #mm for one digit
       my $cell_width=0;
       foreach my $member (@$rbubble_values) {
    my $cell_width_real=0;
    if ($member=~/(\d*)\.?(\d*)(E|e)(\+|-)?(\d*)/) {
       $cell_width_real=(length($1)+length($2)+length($5)+9)*$scale;
    } elsif ($member=~/(\d*)\.?(\d*)/) {
       $cell_width_real=(length($1)+length($2)+3)*$scale;
    } else {
       $cell_width_real=(length($member)+1)*$scale;
    }
    if ($cell_width_real>$cell_width) {$cell_width=$cell_width_real;}
       }
       $cell_width+=8; 
       my $textwidth;
       if ($ENV{'form.textwidth'} ne '') {
    $ENV{'form.textwidth'}=~/(\d*)\.?(\d*)/;
    $textwidth=$1.'.'.$2;
       } else {
    $ENV{'textwidth'}=~/(\d+)\.?(\d*)/;
    $textwidth=$1.'.'.$2;
       }
       my $bubbles_per_line=int($textwidth/$cell_width);
       if (($bubbles_per_line > $number_of_bubbles/2) && ($number_of_bubbles % 2==2)) {$bubbles_per_line=$number_of_bubbles/2;}
       my $number_of_tables = int($number_of_bubbles/$bubbles_per_line);
       my @table_range = ();
       for (my $i=0;$i<$number_of_tables;$i++) {push @table_range,$bubbles_per_line;}
       if ($number_of_bubbles % $bubbles_per_line) {
    $number_of_tables++;
    push @table_range,($number_of_bubbles % $bubbles_per_line);
       }
       $cell_width-=8;
       return ($cell_width,$number_of_tables,@table_range);
   }
   
   sub format_number {
       my ($number,$format,$target)=@_;
       my $ans;
       if ($format ne '') {
    $format=~s/e/E/g;
    $ans = sprintf('%.'.$format,$number);
       } else {
    my $format = '';
    #What is the number? (integer,decimal,floating point)
    if ($number=~/^(\d*\.?\d*)(E|e)(\d*)$/) {
       $format = '3e';
    } elsif ($number=~/^(\d*)\.(\d*)$/) {
       $format = '4f';
    } elsif ($number=~/^(\d*)$/) {
       $format = 'd';
    }
    $ans = sprintf('%.'.$format,$number);
       }
       if ($target eq 'tex') {
    if ($ans =~ m/([0-9\.\-\+]+)E([0-9\-\+]+)/ ) {
       my $number = $1;
       my $power = $2;
       $power=~s/^\+//;
       $power=~s/^(-?)0+(\d+)/$1$2/;
       $ans=$number.'$\times 10^{'.$power.'}$'; #'stupidemacs
    }
       }
       return $ans;
   }
   
   sub make_numerical_bubbles {
       my ($number_of_bubbles,$target,$answer,$format,$incorrect) =@_;
       my @bubble_values = ();
       &Apache::lonxml::debug("answer is $answer incorrect is $incorrect");
       my @oldseed=&Math::Random::random_get_seed();
       if (defined($incorrect) && ref($incorrect)) {
    &Apache::lonxml::debug("inside ".(scalar(@$incorrect)+1 gt $number_of_bubbles));
    if (defined($$incorrect[0]) &&
       scalar(@$incorrect)+1 >= $number_of_bubbles) {
       &Apache::lonxml::debug("inside ".(scalar(@$incorrect)+1).":$number_of_bubbles");
       &Apache::response::setrandomnumber();
       my @rand_inc=&Math::Random::random_permutation(@$incorrect);
       @bubble_values=@rand_inc[0..($number_of_bubbles-2)];
       @bubble_values=sort {$a <=> $b} (@bubble_values,$answer);
       &Apache::lonxml::debug("Answer was :$answer: returning :".$#bubble_values.": whih are :".join(':',@bubble_values));
       &Math::Random::random_set_seed(@oldseed);
       if (defined($format) && $format ne '') {
    foreach my $value (@bubble_values) {
       $value=&format_number($value,$format,$target);
    }
       }
       return @bubble_values;
    }
    if (defined($$incorrect[0]) &&
       scalar(@$incorrect)+1 < $number_of_bubbles) {
       &Apache::lonxml::warning("Not enough incorrect answers were specified in the incorrect array, ignoring the specified incorrect answers and instead generating them.");
    }
       }
       my @factors = (1.13,1.17,1.25,1.33,1.45); #default values of factors
       my @powers = (1..$number_of_bubbles);
       &Apache::response::setrandomnumber();
       my $ind=&Math::Random::random_uniform_integer(1,0,$#powers);
       my $power = $powers[$ind];
       $ind=&Math::Random::random_uniform_integer(1,0,$#factors);
       my $factor = $factors[$ind];
       for ($ind=0;$ind<$number_of_bubbles;$ind++) {
    $bubble_values[$ind] = $answer*($factor**($power-$powers[$#powers-$ind]));
    $bubble_values[$ind] = &format_number($bubble_values[$ind],
          $format,$target);
   
       }
       &Math::Random::random_set_seed(@oldseed);
       return @bubble_values;
   }
   
   sub get_tolrange {
       my ($ans,$tol)=@_;
       my ($high,$low);
       if ($tol =~ /%$/) {
    chop($tol);
    my $change=$ans*($tol/100.0);
    $high=$ans+$change;
    $low=$ans-$change;
       } else {
    $high=$ans+$tol;
    $low=$ans-$tol;
       }
       return ($high,$low);
   }
   
   sub get_sigrange {
       my ($sig)=@_;
       &Apache::lonxml::debug("Got a sig of :$sig:");
       my $sig_lbound;
       my $sig_ubound;
       if ($sig eq '') {
    $sig_lbound = 0; #SIG_LB_DEFAULT
    $sig_ubound =15; #SIG_UB_DEFAULT
       } else {
    ($sig_lbound,$sig_ubound) = split(/,/,$sig);
    if (!$sig_lbound) {
       $sig_lbound = 0; #SIG_LB_DEFAULT
       $sig_ubound =15; #SIG_UB_DEFAULT
    }
    if (!$sig_ubound) { $sig_ubound=$sig_lbound; }
       }
       if (($sig_ubound<$sig_lbound) ||
    ($sig_lbound > 15) ||
    ($sig =~/(\+|-)/ ) ) {
    my $errormsg=&mt("Invalid Significant figures detected")." ($sig)";
    if ($ENV{'request.state'} eq 'construct') {
       $errormsg.=
    &Apache::loncommon::help_open_topic('Significant_Figures');
    }
    &Apache::lonxml::error($errormsg);
       }
       return ($sig_ubound,$sig_lbound);
   }
   
   sub start_stringresponse {
       my ($target,$token,$tagstack,$parstack,$parser,$safeeval,$style)=@_;
       my $result;
       my $id = &Apache::response::start_response($parstack,$safeeval);
       if ($target eq 'meta') {
    &Apache::response::start_response($parstack,$safeeval);
    $result=&Apache::response::meta_package_write('stringresponse');
    &Apache::response::end_response();
       } elsif ($target eq 'edit') {
    $result.=&Apache::edit::tag_start($target,$token);
    $result.=&Apache::edit::text_arg('Answer:','answer',$token);
    $result.=&Apache::edit::select_arg('Type:','type',
    [['cs','Case Sensitive'],['ci','Case Insensitive'],
     ['mc','Case Insensitive, Any Order'],
     ['re','Regular Expression']],$token);
    $result.=&Apache::edit::checked_arg('Answer Display:','answerdisplay',
       [['inline','Inline']],$token);
    $result.=&Apache::edit::end_row().&Apache::edit::start_spanning_row();
       } elsif ($target eq 'modified') {
          my $constructtag;
          $constructtag=&Apache::edit::get_new_args($token,$parstack,
                                                    $safeeval,'answer',
                                                    'type','answerdisplay');
          if ($constructtag) {
              $result = &Apache::edit::rebuild_tag($token);
              $result.=&Apache::edit::handle_insert();
          }
       } elsif ($target eq 'answer' || $target eq 'grade') {
    &Apache::response::reset_params();
       }
       return $result;
   }
   
   sub end_stringresponse {
       my ($target,$token,$tagstack,$parstack,$parser,$safeeval,$style)=@_;
       my $increment=1;
       my $result = '';
       my $part=$Apache::inputtags::part;
       my $id=$Apache::inputtags::response[-1];
       my $answer=&Apache::lonxml::get_param('answer',$parstack,$safeeval);
       my $type=&Apache::lonxml::get_param('type',$parstack,$safeeval);
       my $answerdisplay=&Apache::lonxml::get_param('answerdisplay',$parstack,$safeeval);
       &Apache::lonxml::debug("current $answer ".$token->[2]);
       if (!$Apache::lonxml::default_homework_loaded) {
    &Apache::lonxml::default_homework_load($safeeval);
       }
       if ( $target eq 'grade' && defined($ENV{'form.submitted'})) {
    &Apache::response::setup_params('stringresponse');
    $safeeval->share_from('capa',['&caparesponse_capa_check_answer']);
    if ($Apache::lonhomework::type eq 'exam' ||
       $ENV{'form.submitted'} eq 'scantron') {
       $increment=&Apache::response::scored_response($part,$id);
    } else {
       my $response = &Apache::response::getresponse();
       if ( $response =~ /[^\s]/) {
    my %previous = &Apache::response::check_for_previous($response,
       $part,$id);
    &Apache::lonxml::debug("submitted a $response<br>\n");
    &Apache::lonxml::debug($$parstack[-1] . "\n<br>");
   
    $Apache::lonhomework::results{"resource.$part.$id.submission"}=
       $response;
    my $ad;
    if ($type eq 're' ) { 
       # if the RE wasn't in a var it likely got munged,
                       # thus grab it from the var directly
   #    my $testans=$token->[2]->{'answer'};
   #    if ($testans !~ m/^\s*\$/) {
   # $answer=$token->[2]->{'answer'};
   #    }
       ${$safeeval->varglob('LONCAPA_INTERNAL_response')}=
    $response;
       $result = &Apache::run::run('return $LONCAPA_INTERNAL_response=~m'.$answer,$safeeval);
       &Apache::lonxml::debug("current $response");
       &Apache::lonxml::debug("current $answer");
       $ad = ($result) ? 'APPROX_ANS' : 'INCORRECT';
    } else {
       $response =~ s/\\/\\\\/g;
       $response =~ s/\'/\\\'/g;
       &Apache::lonxml::debug("current $response");
       my $expression="&caparesponse_check_list('".$response."','".
    $$parstack[-1];
       foreach my $key (keys(%Apache::inputtags::params)) {
    $expression.= ';my $'. #'
       $key.'="'.$Apache::inputtags::params{$key}.'"';
       }
       $expression.="');";
       &Apache::lonxml::debug('answer is'.join(':',$answer));
       @{$safeeval->varglob('CAPARESPONSE_CHECK_LIST_answer')}=($answer);
       $result = &Apache::run::run($expression,$safeeval);
       my ($awards) = split /:/ , $result;
       ($ad) = &Apache::inputtags::finalizeawards(split /,/ , $awards);
       &Apache::lonxml::debug("$expression");
       &Apache::lonxml::debug("\n<br>result:$result:$Apache::lonxml::curdepth<br>\n");
    }
    &Apache::response::handle_previous(\%previous,$ad);
    $Apache::lonhomework::results{"resource.$part.$id.awarddetail"}=$ad;
       }
    }
       } elsif ($target eq 'web' || $target eq 'tex') {
    my $award = $Apache::lonhomework::history{"resource.$Apache::inputtags::part.solved"};
    my $status = $Apache::inputtags::status['-1'];
    if (  &Apache::response::show_answer() ) {
       if ($target eq 'web') {
    $result=($answerdisplay eq 'inline'?'':"<br />".&mt('The correct answer is')." ")
       .$answer;
   #    join(', ',@answers).".<br />";
       }
    }
    if ($Apache::lonhomework::type eq 'exam' && $target eq 'tex') {
       $result.='\fbox{\fbox{\parbox{\textwidth-5mm}{\strut\\\\\strut\\\\\strut\\\\\strut\\\\}}}';
       $increment = &Apache::response::repetition();
       $result.='\begin{enumerate}';
       for (my $i=0;$i<$increment;$i++) {
    $result.='\item[\textbf{'.($Apache::lonxml::counter+$i).
       '}.]\textit{Leave blank on scoring form}\vskip 0 mm';
       }
       $result.= '\end{enumerate}';
    }
       } elsif ($target eq 'answer' || $target eq 'analyze') {
    if ($target eq 'analyze') {
       push (@{ $Apache::lonhomework::analyze{"parts"} },"$part.$id");
       $Apache::lonhomework::analyze{"$part.$id.type"} = 'stringresponse';
    }
    &Apache::response::setup_params('stringresponse');
    if ($target eq 'answer') {
       $result.=&Apache::response::answer_header('stringresponse');
    }
   # foreach my $ans (@answers) {
       if ($target eq 'answer') {
    $result.=&Apache::response::answer_part('stringresponse',$answer);
       } elsif ($target eq 'analyze') {
    push (@{ $Apache::lonhomework::analyze{"$part.$id.answer"} },
         $answer);
       }
   # }
    my $string='Case Insensitive';
    if ($type eq 'mc') {
       $string='Multiple Choice';
    } elsif ($type eq 'cs') {
       $string='Case Sensitive';
    } elsif ($type eq 'ci') {
       $string='Case Insensitive';
    } elsif ($type eq 're') {
       $string='Regular Expression';
    }
    if ($target eq 'answer') {
       if ($ENV{'form.answer_output_mode'} eq 'tex') {
    $result.=&Apache::response::answer_part('stringresponse',
    "$string");
       } else {
    $result.=&Apache::response::answer_part('stringresponse',
    "<b>$string</b>");
       }
    } elsif ($target eq 'analyze') {
       push (@{$Apache::lonhomework::analyze{"$part.$id.str_type"}},
     $type);
    }
    if ($target eq 'answer') {
       $result.=&Apache::response::answer_footer('stringresponse');
    }
       } elsif ($target eq 'edit') {
    $result.='</td></tr>'.&Apache::edit::end_table;
       }
       if ($target eq 'grade' || $target eq 'web' || $target eq 'answer' || 
    $target eq 'tex' || $target eq 'analyze') {
    &Apache::lonxml::increment_counter($increment);
       }
       &Apache::response::end_response;
       return $result;
   }
   
   sub start_formularesponse {
       my ($target,$token,$tagstack,$parstack,$parser,$safeeval,$style)=@_;
       my $result;
       if ($target eq 'meta') {
    &Apache::response::start_response($parstack,$safeeval);
    $result=&Apache::response::meta_package_write('formularesponse');
    &Apache::response::end_response();
       } else {
    $result.=&start_numericalresponse(@_);
       }
       return $result;
   }
   
   sub end_formularesponse {
       return end_numericalresponse(@_);
 }  }
   
 1;  1;
 __END__  __END__
    
Removed from v.1.21  
changed lines
  Added in v.1.134

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