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Diff for /loncom/homework/caparesponse/caparesponse.pm between versions 1.112 and 1.223

version 1.112, 2003/09/22 18:47:59 version 1.223, 2008/03/06 16:28:22
Line 29 Line 29
 package Apache::caparesponse;  package Apache::caparesponse;
 use strict;  use strict;
 use capa;  use capa;
   use Safe::Hole;
   use Apache::lonmaxima();
   use Apache::lonlocal;
   use Apache::lonnet;
   use Apache::response();
   use Storable qw(dclone);
   
 BEGIN {  BEGIN {
     &Apache::lonxml::register('Apache::caparesponse',('caparesponse','numericalresponse','stringresponse','formularesponse'));      &Apache::lonxml::register('Apache::caparesponse',('numericalresponse','stringresponse','formularesponse'));
   }
   
   my %answer;
   my @answers;
   sub get_answer { return %answer; };
   sub push_answer{ push(@answers,dclone(\%answer)); undef(%answer) }
   sub pop_answer { %answer = %{pop(@answers)}; };
   
   my $cur_name;
   my $tag_internal_answer_name = 'INTERNAL';
   
   sub start_answer {
       my ($target,$token,$tagstack,$parstack,$parser,$safeeval)=@_;
       my $result;
       $cur_name = &Apache::lonxml::get_param('name',$parstack,$safeeval);
       if ($cur_name =~ /^\s*$/) { $cur_name = $Apache::lonxml::curdepth; }
       my $type = &Apache::lonxml::get_param('type',$parstack,$safeeval);
       if (!defined($type) && $tagstack->[-2] eq 'answergroup') {
    $type = &Apache::lonxml::get_param('type',$parstack,$safeeval,-2);
       }
       if (!defined($type)) { $type = 'ordered' };
       $answer{$cur_name}= { 'type' => $type,
     'answers' => [] };
       if ($target eq 'edit') {
     $result.=&Apache::edit::tag_start($target,$token);
    $result.=&Apache::edit::text_arg('Name:','name',$token);
    $result.=&Apache::edit::select_arg('Type:','type',
      [['ordered',  'Ordered'  ],
       ['unordered','Unordered'],],
      $token);
    $result.=&Apache::edit::end_row().&Apache::edit::start_spanning_row();
       } elsif ($target eq 'modified') {
    my $constructtag = &Apache::edit::get_new_args($token,$parstack,
          $safeeval,'name',
          'type');
    if ($constructtag) {
       $result = &Apache::edit::rebuild_tag($token);
       $result.= &Apache::edit::handle_insert();
    }
       }
       return $result;
   }
   
   sub end_answer {
       my ($target,$token,$tagstack,$parstack,$parser,$safeeval)=@_;
       my $result;
       if ($target eq 'edit') {
    $result .= &Apache::edit::tag_end();
       }
   
       undef($cur_name);
       return $result;
   }
   
   sub insert_answer {
       return '
           <answer>
               <value></value>
           </answer>';
   }
   
   sub start_answergroup {
       my ($target,$token,$tagstack,$parstack,$parser,$safeeval)=@_;
       my $result;
       if ($target eq 'edit') {
     $result.=&Apache::edit::tag_start($target,$token);
    $result.=&Apache::edit::select_arg('Type:','type',
      [['ordered',  'Ordered'  ],
       ['unordered','Unordered'],],
      $token);
    $result.=&Apache::edit::end_row().&Apache::edit::start_spanning_row();
       } elsif ($target eq 'modified') {
    my $constructtag = &Apache::edit::get_new_args($token,$parstack,
          $safeeval,'name',
          'type');
    if ($constructtag) {
       $result = &Apache::edit::rebuild_tag($token);
       $result.= &Apache::edit::handle_insert();
    }
       }
       return $result;
   }
   
   sub end_answergroup {
       my ($target,$token,$tagstack,$parstack,$parser,$safeeval)=@_;
       my $result;
       if ($target eq 'web') {
       if (  &Apache::response::show_answer() ) {  
       my $partid = $Apache::inputtags::part;
       my $id = $Apache::inputtags::response[-1];
       &set_answertext($Apache::lonhomework::history{"resource.$partid.$id.answername"},
       $target,$token,$tagstack,$parstack,$parser,
       $safeeval,-2);
    }
       } elsif ($target eq 'edit') {
    $result .= &Apache::edit::tag_end();
       }
       return $result;
   }
   
   sub insert_answergroup {
       return '
       <answergroup>
           <answer>
               <value></value>
           </answer>
       </answergroup>';
   }
   
   sub start_value {
       my ($target,$token,$tagstack,$parstack,$parser,$safeeval,$style)=@_;
       my $result;
       if ( $target eq 'web' || $target eq 'tex' ||
    $target eq 'grade' || $target eq 'webgrade' ||
    $target eq 'answer' || $target eq 'analyze' ) {
    my $bodytext = &Apache::lonxml::get_all_text("/value",$parser,$style);
    $bodytext = &Apache::run::evaluate($bodytext,$safeeval,
      $$parstack[-1]);
   
    push(@{ $answer{$cur_name}{'answers'} },[$bodytext]);
   
       } elsif ($target eq 'edit') {
     $result.=&Apache::edit::tag_start($target,$token);
    my $bodytext = &Apache::lonxml::get_all_text("/value",$parser,$style);
    $result.=&Apache::edit::editline($token->[1],$bodytext,undef,40).
       &Apache::edit::end_row();
       } elsif ($target eq 'modified') {
    $result=$token->[4].&Apache::edit::modifiedfield('/value',$parser);
       }
       return $result;
   }
   
   sub end_value {
       my ($target,$token,$tagstack,$parstack,$parser,$safeeval)=@_;
       my $result;
       if ($target eq 'edit') {
    $result = &Apache::edit::end_table();
       }
       return $result;
   }
   
   sub insert_value {
       return '
               <value></value>';
   }
   
   sub start_vector {
       my ($target,$token,$tagstack,$parstack,$parser,$safeeval,$style)=@_;
       my $result;
       if ( $target eq 'web' || $target eq 'tex' ||
    $target eq 'grade' || $target eq 'webgrade' ||
    $target eq 'answer' || $target eq 'analyze' ) {
    my $bodytext = &Apache::lonxml::get_all_text("/vector",$parser,$style);
    my @values = &Apache::run::run($bodytext,$safeeval,$$parstack[-1]);
    if (@values == 1) {
       @values = split(',',$values[0]);
    }
    push(@{ $answer{$cur_name}{'answers'} },\@values);
       } elsif ($target eq 'edit') {
     $result.=&Apache::edit::tag_start($target,$token);
    my $bodytext = &Apache::lonxml::get_all_text("/vector",$parser,$style);
    $result.=&Apache::edit::editline($token->[1],$bodytext,undef,40).
       &Apache::edit::end_row();
       } elsif ($target eq 'modified') {
    $result=$token->[4].&Apache::edit::modifiedfield('/vector',$parser);
       }
       return $result;
   }
   
   sub end_vector {
       my ($target,$token,$tagstack,$parstack,$parser,$safeeval)=@_;
       my $result;
       if ($target eq 'edit') {
    $result = &Apache::edit::end_table();
       }
       return $result;
   }
   
   sub insert_vector {
       return '
               <value></value>';
   }
   
   sub start_array {
       my ($target,$token,$tagstack,$parstack,$parser,$safeeval,$style)=@_;
       my $result;
       if ( $target eq 'web' || $target eq 'tex' ||
    $target eq 'grade' || $target eq 'webgrade' ||
    $target eq 'answer' || $target eq 'analyze' ) {
    my $bodytext = &Apache::lonxml::get_all_text("/array",$parser,$style);
    my @values = &Apache::run::evaluate($bodytext,$safeeval,
       $$parstack[-1]);
    push(@{ $answer{$cur_name}{'answers'} },@values);
       }
       return $result;
   }
   
   sub end_array {
       my ($target,$token,$tagstack,$parstack,$parser,$safeeval)=@_;
       my $result;
       return $result;
   }
   
   sub start_unit {
       my ($target,$token,$tagstack,$parstack,$parser,$safeeval)=@_;
       my $result;
       return $result;
   }
   
   sub end_unit {
       my ($target,$token,$tagstack,$parstack,$parser,$safeeval)=@_;
       my $result;
       return $result;
 }  }
   
 sub start_numericalresponse {  sub start_numericalresponse {
     my ($target,$token,$tagstack,$parstack,$parser,$safeeval)=@_;      my ($target,$token,$tagstack,$parstack,$parser,$safeeval)=@_;
       &Apache::lonxml::register('Apache::caparesponse',
         ('answer','answergroup','value','array','unit',
          'vector'));
       push(@Apache::lonxml::namespace,'caparesponse');
     my $id = &Apache::response::start_response($parstack,$safeeval);      my $id = &Apache::response::start_response($parstack,$safeeval);
     my $result;      my $result;
       undef(%answer);
       undef(%{$safeeval->varglob('LONCAPA::CAPAresponse_args')});
     if ($target eq 'edit') {      if ($target eq 'edit') {
  $result.=&Apache::edit::tag_start($target,$token);   $result.=&Apache::edit::tag_start($target,$token);
  $result.=&Apache::edit::text_arg('Answer:','answer',$token);   $result.=&Apache::edit::text_arg('Answer:','answer',$token);
  if ($token->[1] eq 'numericalresponse') {   if ($token->[1] eq 'numericalresponse') {
       $result.=&Apache::edit::text_arg('Incorrect Answers:','incorrect',
        $token).
    &Apache::loncommon::help_open_topic('numerical_wrong_answers');
     $result.=&Apache::edit::text_arg('Unit:','unit',$token,5).      $result.=&Apache::edit::text_arg('Unit:','unit',$token,5).
  &Apache::loncommon::help_open_topic('Physical_Units');   &Apache::loncommon::help_open_topic('Physical_Units');
     $result.=&Apache::edit::text_arg('Format:','format',$token,4).      $result.=&Apache::edit::text_arg('Format:','format',$token,4).
  &Apache::loncommon::help_open_topic('Numerical_Response_Format');   &Apache::loncommon::help_open_topic('Numerical_Response_Format');
  } elsif ($token->[1] eq 'stringresponse') {  
     $result.=&Apache::edit::select_arg('Type:','type',  
  [['cs','Case Sensitive'],['ci','Case Insensitive'],  
   ['mc','Case Insensitive, Any Order']],$token);  
  } elsif ($token->[1] eq 'formularesponse') {   } elsif ($token->[1] eq 'formularesponse') {
     $result.=&Apache::edit::text_arg('Sample Points:','samples',      $result.=&Apache::edit::text_arg('Sample Points:','samples',
      $token,40).       $token,40).
Line 61  sub start_numericalresponse { Line 285  sub start_numericalresponse {
  if ($token->[1] eq 'numericalresponse') {   if ($token->[1] eq 'numericalresponse') {
     $constructtag=&Apache::edit::get_new_args($token,$parstack,      $constructtag=&Apache::edit::get_new_args($token,$parstack,
       $safeeval,'answer',        $safeeval,'answer',
       'unit','format');         'incorrect','unit',
  } elsif ($token->[1] eq 'stringresponse') {        'format');
     $constructtag=&Apache::edit::get_new_args($token,$parstack,  
       $safeeval,'answer',  
       'type');  
  } elsif ($token->[1] eq 'formularesponse') {   } elsif ($token->[1] eq 'formularesponse') {
     $constructtag=&Apache::edit::get_new_args($token,$parstack,      $constructtag=&Apache::edit::get_new_args($token,$parstack,
       $safeeval,'answer',        $safeeval,'answer',
Line 89  sub start_numericalresponse { Line 310  sub start_numericalresponse {
     $safeeval);      $safeeval);
     if ($unit =~ /\S/) { $result.=" (in $unit) "; }      if ($unit =~ /\S/) { $result.=" (in $unit) "; }
  }   }
    if (  &Apache::response::show_answer() ) {
       &set_answertext($tag_internal_answer_name,$target,$token,$tagstack,
       $parstack,$parser,$safeeval,-1);
    }
     }      }
     return $result;      return $result;
 }  }
   
   sub set_answertext {
       my ($name,$target,$token,$tagstack,$parstack,$parser,$safeeval,
    $response_level) = @_;
       &add_in_tag_answer($parstack,$safeeval,$response_level);
   
       if ($name eq '' || !ref($answer{$name})) {
    if (ref($answer{$tag_internal_answer_name})) {
       $name = $tag_internal_answer_name;
    } else {
       $name = (sort(keys(%answer)))[0];
    }
       }
       return if ($name eq '' || !ref($answer{$name}));
   
       my (@formats)=&Apache::lonxml::get_param_var('format',$parstack,
    $safeeval,$response_level);
       my $unit=&Apache::lonxml::get_param_var('unit',$parstack,$safeeval,
       $response_level);
   
       &Apache::lonxml::debug("answer looks to be $name");
       my @answertxt;
       for (my $i=0; $i < scalar(@{$answer{$name}{'answers'}}); $i++) {
    my $answertxt;
    my $answer=$answer{$name}{'answers'}[$i];
    foreach my $element (@$answer) {
       if ( scalar(@$tagstack)
    && $tagstack->[$response_level] ne 'numericalresponse') {
    $answertxt.=$element.',';
       } else {
    my $format;
    if ($#formats > 0) {
       $format=$formats[$i];
    } else {
       $format=$formats[0];
    }
    if ($unit=~/\$/) { $format="\$".$format; $unit=~s/\$//g; }
    if ($unit=~/\,/) { $format="\,".$format; $unit=~s/\,//g; }
    my $formatted=&format_number($element,$format,$target,
        $safeeval);
    $answertxt.=' '.$formatted.',';
       }
       
    }
    chop($answertxt);
    if ($target eq 'web') {
       $answertxt.=" $unit ";
    }
   
    push(@answertxt,$answertxt)
       }
   
       my $id = $Apache::inputtags::response[-1];
       $Apache::inputtags::answertxt{$id}=\@answertxt;
   }
   
   sub setup_capa_args {
       my ($safeeval,$parstack,$args,$response) = @_;
       my $args_ref= \%{$safeeval->varglob('LONCAPA::CAPAresponse_args')};
       undef(%{ $args_ref });
    
       foreach my $arg (@{$args}) {
    $$args_ref{$arg}=
       &Apache::lonxml::get_param($arg,$parstack,$safeeval);
       }
       foreach my $key (keys(%Apache::inputtags::params)) {
    $$args_ref{$key}=$Apache::inputtags::params{$key};
       }
       &setup_capa_response($args_ref,$response);
       return $args_ref;
   }
   
   sub setup_capa_response {
       my ($args_ref,$response) = @_;   
   
       if (ref($response)) {
    $$args_ref{'response'}=dclone($response);
       } else {
    $$args_ref{'response'}=dclone([$response]);
       }
   }
   
   sub check_submission {
       my ($response,$partid,$id,$tag,$parstack,$safeeval,$ignore_sig)=@_;
       my @args = ('type','tol','sig','format','unit','calc','samples');
       my $args_ref = &setup_capa_args($safeeval,$parstack,\@args,$response);
   
       my $hideunit=
    &Apache::lonnet::EXT('resource.'.$partid.'_'.$id.'.turnoffunit');
           #no way to enter units, with radio buttons
       if ($Apache::lonhomework::type eq 'exam' ||
    lc($hideunit) eq "yes") {
    delete($$args_ref{'unit'});
       }
       #sig fig don't make much sense either
       if (($Apache::lonhomework::type eq 'exam' ||
    &Apache::response::submitted('scantron') ||
    $ignore_sig) &&
    $tag eq 'numericalresponse') {
    delete($$args_ref{'sig'});
       }
       
       if ($tag eq 'formularesponse') {
    if ($$args_ref{'samples'}) {
       $$args_ref{'type'}='fml';
    } else {
       $$args_ref{'type'}='math';
    }
       } elsif ($tag eq 'numericalresponse') {
    $$args_ref{'type'}='float';
       }
       
       &add_in_tag_answer($parstack,$safeeval);
   
       if (!%answer) {
    &Apache::lonxml::error("No answers are defined");
       }
   
       my (@final_awards,@final_msgs,@names);
       foreach my $name (keys(%answer)) {
    &Apache::lonxml::debug(" doing $name with ".join(':',@{ $answer{$name}{'answers'} }));
   
    ${$safeeval->varglob('LONCAPA::CAPAresponse_answer')}=dclone($answer{$name});
    &setup_capa_response($args_ref,$response);
    use Time::HiRes;
    my $t0 = [Time::HiRes::gettimeofday()];
    my ($result,@msgs) = 
       &Apache::run::run("&caparesponse_check_list()",$safeeval);
    &Apache::lonxml::debug("checking $name $result with $response took ".&Time::HiRes::tv_interval($t0));
    &Apache::lonxml::debug('msgs are '.join(':',@msgs));
    my ($awards)=split(/:/,$result);
    my @awards= split(/,/,$awards);
    my ($ad, $msg) = &Apache::inputtags::finalizeawards(\@awards,\@msgs);
    push(@final_awards,$ad);
    push(@final_msgs,$msg);
    push(@names,$name);
       }
       my ($ad, $msg, $name) = &Apache::inputtags::finalizeawards(\@final_awards,
          \@final_msgs,
          \@names,1);
       &Apache::lonxml::debug(" name of picked award is $name from ".join(', ',@names));
       return($ad,$msg, $name);
   }
   
   sub add_in_tag_answer {
       my ($parstack,$safeeval,$response_level) = @_;
       my @answer=&Apache::lonxml::get_param_var('answer',$parstack,$safeeval,
         $response_level);
       &Apache::lonxml::debug('answer is'.join(':',@answer));
       if (@answer && $answer[0] =~ /\S/) {
    $answer{$tag_internal_answer_name}= {'type' => 'ordered',
        'answers' => [\@answer] };
       }
   }
   
   sub capa_formula_fix {
      my ($expression)=@_;
      return &Apache::response::implicit_multiplication($expression);
   }
   
 sub end_numericalresponse {  sub end_numericalresponse {
     my ($target,$token,$tagstack,$parstack,$parser,$safeeval,$style)=@_;      my ($target,$token,$tagstack,$parstack,$parser,$safeeval,$style)=@_;
   
       &Apache::lonxml::deregister('Apache::caparesponse',
         ('answer','answergroup','value','array','unit',
          'vector'));
       pop(@Apache::lonxml::namespace);
   
     my $increment=1;      my $increment=1;
     my $result = '';      my $result = '';
     if (!$Apache::lonxml::default_homework_loaded) {      if (!$Apache::lonxml::default_homework_loaded) {
  &Apache::lonxml::default_homework_load($safeeval);   &Apache::lonxml::default_homework_load($safeeval);
     }      }
     if ( $target eq 'grade' && defined($ENV{'form.submitted'})) {      my $partid = $Apache::inputtags::part;
  &Apache::response::setup_params($$tagstack[-1]);      my $id = $Apache::inputtags::response[-1];
  $safeeval->share_from('capa',['&caparesponse_capa_check_answer']);      my $tag;
  my $partid = $Apache::inputtags::part;      my $safehole = new Safe::Hole;
  my $id = $Apache::inputtags::response['-1'];      $safeeval->share_from('capa',['&caparesponse_capa_check_answer']);
   
       if (scalar(@$tagstack)) { $tag=$$tagstack[-1]; }
       if ( $target eq 'grade' && &Apache::response::submitted() ) {
    &Apache::response::setup_params($tag,$safeeval);
  if ($Apache::lonhomework::type eq 'exam' &&    if ($Apache::lonhomework::type eq 'exam' && 
     ($$tagstack[-1] eq 'formularesponse' ||      (($tag eq 'formularesponse') || ($tag eq 'mathresponse'))) {
      $$tagstack[-1] eq 'stringresponse')) {  
     $increment=&Apache::response::scored_response($partid,$id);      $increment=&Apache::response::scored_response($partid,$id);
  } else {   } else {
     my $response = &Apache::response::getresponse();      my $response = &Apache::response::getresponse();
     if ( $response =~ /[^\s]/) {      if ( $response =~ /[^\s]/) {
  my $ad;  
  my %previous = &Apache::response::check_for_previous($response,$partid,$id);   my %previous = &Apache::response::check_for_previous($response,$partid,$id);
  $Apache::lonhomework::results{"resource.$partid.$id.submission"}=$response;  
  &Apache::lonxml::debug("submitted a $response<br>\n");   &Apache::lonxml::debug("submitted a $response<br>\n");
  &Apache::lonxml::debug($$parstack[-1] . "\n<br>");   &Apache::lonxml::debug($$parstack[-1] . "\n<br>");
   
  if ($ENV{'form.submitted'} eq 'scantron') {   if ( &Apache::response::submitted('scantron')) {
     my $number_of_bubbles = 8;#default values for number of bubbles      &add_in_tag_answer($parstack,$safeeval);
     my (@formats)=&Apache::lonxml::get_param_var('format',      my ($values,$display)=&make_numerical_bubbles($partid,$id,
  $parstack,$safeeval);    $target,$parstack,$safeeval);
     my (@answers)=&Apache::lonxml::get_param_var('answer',      $response=$values->[$response];
  $parstack,$safeeval);   }
     my @values=&make_numerical_bubbles($number_of_bubbles,$target,   $Apache::lonhomework::results{"resource.$partid.$id.submission"}=$response;
        $answers[0],$formats[0]);   my ($ad,$msg,$name)=&check_submission($response,$partid,$id,
     $response=$values[$response];        $tag,$parstack,
  } else {        $safeeval);
     $response =~ s/\\/\\\\/g;  
     $response =~ s/\'/\\\'/g;   &Apache::lonxml::debug('ad is'.$ad);
    if ($ad eq 'SIG_FAIL') {
       my ($sig_u,$sig_l)=
    &get_sigrange($Apache::inputtags::params{'sig'});
       $msg=join(':',$msg,$sig_l,$sig_u);
       &Apache::lonxml::debug("sigs bad $sig_u $sig_l ".
      $Apache::inputtags::params{'sig'});
  }   }
  &Apache::lonxml::debug("current $response");  
  my $expression="&caparesponse_check_list('".$response."','".  
     $$parstack[-1];  
  my $hideunit=&Apache::lonnet::EXT('resource.'.$partid.'_'.$id.'.turnoffunit');  
  #no way to enter units, with radio buttons  
  if ($Apache::lonhomework::type eq 'exam' ||  
     lc($hideunit) eq "yes") {  
     $expression.=';my $unit=undef;';  
  }  
  foreach my $key (keys(%Apache::inputtags::params)) {  
     $expression.= ';my $'. #'  
  $key.'="'.$Apache::inputtags::params{$key}.'"';  
  }  
  if ($$tagstack[-1] eq 'formularesponse') {  
     $expression.=';my $type="fml";';  
  } elsif ($$tagstack[-1] 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::lonxml::debug("\n<br>result:$result:$Apache::lonxml::curdepth<br>\n");
    if ($Apache::lonhomework::type eq 'survey' &&
       ($ad eq 'INCORRECT' || $ad eq 'APPROX_ANS' ||
        $ad eq 'EXACT_ANS')) {
       $ad='SUBMITTED';
    }
  &Apache::response::handle_previous(\%previous,$ad);   &Apache::response::handle_previous(\%previous,$ad);
  $Apache::lonhomework::results{"resource.$partid.$id.awarddetail"}=$ad;   $Apache::lonhomework::results{"resource.$partid.$id.awarddetail"}=$ad;
    $Apache::lonhomework::results{"resource.$partid.$id.awardmsg"}=$msg;
    $Apache::lonhomework::results{"resource.$partid.$id.answername"}=$name;
  $result='';   $result='';
     }      }
  }   }
     } elsif ($target eq 'web' || $target eq 'tex') {      } elsif ($target eq 'web' || $target eq 'tex') {
  my (@answers)=&Apache::lonxml::get_param_var('answer',$parstack,   &check_for_answer_errors($parstack,$safeeval);
      $safeeval);  
  my $award = $Apache::lonhomework::history{"resource.$Apache::inputtags::part.solved"};   my $award = $Apache::lonhomework::history{"resource.$Apache::inputtags::part.solved"};
  my $status = $Apache::inputtags::status['-1'];   my $status = $Apache::inputtags::status['-1'];
  if (   ($award =~ /^correct/  
                 && lc($Apache::lonhomework::problemstatus) ne 'no')  
        || $status eq "SHOW_ANSWER") {  
     my (@formats)=&Apache::lonxml::get_param_var('format',$parstack,  
  $safeeval);  
     my $unit=&Apache::lonxml::get_param_var('unit',$parstack,  
     $safeeval);  
     if ($target eq 'web') {  
  $result="<br />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') {   if ($Apache::lonhomework::type eq 'exam') {
     my $number_of_bubbles = 8; #default values for number of bubbles      # FIXME support multi dimensional numerical problems
     my (@formats)=&Apache::lonxml::get_param_var('format',$parstack,              #       in exam bubbles
  $safeeval);      my ($bubble_values,$bubble_display)=
    &make_numerical_bubbles($partid,$id,$target,$parstack,
    $safeeval);
       my $number_of_bubbles = scalar(@{ $bubble_values });
     my $unit=&Apache::lonxml::get_param_var('unit',$parstack,      my $unit=&Apache::lonxml::get_param_var('unit',$parstack,
     $safeeval);      $safeeval);
     my @bubble_values=&make_numerical_bubbles($number_of_bubbles,  
       $target,$answers[0],  
       $formats[0]);  
     my @alphabet=('A'..'Z');      my @alphabet=('A'..'Z');
     my $id=$Apache::inputtags::response[-1];  
     if ($target eq 'web') {      if ($target eq 'web') {
  if ($$tagstack[-1] eq 'numericalresponse') {   if ($tag eq 'numericalresponse') {
     if ($unit=~/\S/) {$result.=' (in '.$unit.')<br /><br />';}      if ($unit=~/\S/) {$result.=' (in '.$unit.')<br /><br />';}
     $result.= '<table border="1"><tr>';      $result.= '<table border="1"><tr>';
       my $previous=$Apache::lonhomework::history{"resource.$Apache::inputtags::part.$id.submission"};
     for (my $ind=0;$ind<$number_of_bubbles;$ind++) {      for (my $ind=0;$ind<$number_of_bubbles;$ind++) {
    my $checked='';
    if ($previous eq $bubble_values->[$ind]) {
       $checked=" checked='on' ";
    }
  $result.='<td><input type="radio" name="HWVAL_'.$id.   $result.='<td><input type="radio" name="HWVAL_'.$id.
     '" value="'.$bubble_values[$ind].'"><b>'.      '" value="'.$bubble_values->[$ind].'" '.$checked
  $alphabet[$ind].'</b>: '.      .' /><b>'.$alphabet[$ind].'</b>: '.
     $bubble_values[$ind].'</td>';      $bubble_display->[$ind].'</td>';
     }      }
     $result.='</tr></table>';      $result.='</tr></table>';
  } elsif ($$tagstack[-1] eq 'formularesponse') {  
     $result.= '<br /><br /><font color="red">  
                            <textarea name="HWVAL_'.$id.'" rows="4" cols="50">  
                            </textarea></font> <br /><br />';  
  }   }
     } elsif ($target eq 'tex') {      } elsif ($target eq 'tex') {
  if ((defined $unit) and ($unit=~/\S/) and ($Apache::lonhomework::type eq 'exam')) {   if ((defined $unit) and ($unit=~/\S/) and ($Apache::lonhomework::type eq 'exam')) {
     $result.=' \textit{(in} \verb|'.$unit.'|\textit{)} ';      $result.=' \textit{(in} \verb|'.$unit.'|\textit{)} ';
  }   }
  if ($$tagstack[-1] eq 'numericalresponse') {   if ($tag eq 'numericalresponse') {
     my ($celllength,$number_of_tables,@table_range)=      my ($celllength,$number_of_tables,@table_range)=
  &get_table_sizes($formats[0],$number_of_bubbles);   &get_table_sizes($number_of_bubbles,$bubble_display);
     my $j=0;      my $j=0;
     my $cou=0;      my $cou=0;
     $result.='\vskip -1 mm \noindent \begin{enumerate}\item[\textbf{'.$Apache::lonxml::counter.'}.]';      $result.='\vskip -1 mm \noindent \begin{enumerate}\item[\textbf{'.$Apache::lonxml::counter.'}.]';
     for (my $i=0;$i<$number_of_tables;$i++) {      for (my $i=0;$i<$number_of_tables;$i++) {
  $result.='\vskip -1 mm \noindent \begin{tabular}{';   $result.='\vskip -1 mm \noindent \setlength{\tabcolsep}{2 mm}\begin{tabular}{';
  for (my $ind=0;$ind<$table_range[$j];$ind++) {   for (my $ind=0;$ind<$table_range[$j];$ind++) {
     $result.='lp{'.$celllength.' mm}';      $result.='p{3 mm}p{'.$celllength.' mm}';
  }   }
  $result.='}';   $result.='}';
  for (my $ind=$cou;$ind<$cou+$table_range[$j];$ind++) {   for (my $ind=$cou;$ind<$cou+$table_range[$j];$ind++) {
     $result.='\hskip -3 mm {\small \textbf{'.$alphabet[$ind].'}}$\bigcirc$\hskip -2 mm & {\small '.$bubble_values[$ind].'} ';      $result.='\hskip -4 mm {\small \textbf{'.$alphabet[$ind].'}}$\bigcirc$ & \hskip -3 mm {\small '.$bubble_display->[$ind].'} ';
     if ($ind != $cou+$table_range[$j]-1) {$result.=' & ';}      if ($ind != $cou+$table_range[$j]-1) {$result.=' & ';}
  }   }
  $cou += $table_range[$j];   $cou += $table_range[$j];
Line 260  sub end_numericalresponse { Line 598  sub end_numericalresponse {
     }      }
     $result.='\end{enumerate}';      $result.='\end{enumerate}';
  } else {   } else {
     $result.='\fbox{\fbox{\parbox{\textwidth-5mm}{\strut\\\\\strut\\\\\strut\\\\\strut\\\\}}}';      $increment = &Apache::response::repetition();
     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}';  
  }   }
     }      }
  }   }
    &Apache::response::setup_prior_tries_hash(\&format_prior_response_numerical);
     } elsif ($target eq 'edit') {      } elsif ($target eq 'edit') {
  $result.='</td></tr>'.&Apache::edit::end_table;   $result.='</td></tr>'.&Apache::edit::end_table;
     } elsif ($target eq 'answer' || $target eq 'analyze') {      } elsif ($target eq 'answer' || $target eq 'analyze') {
    my $part_id="$partid.$id";
  my $part_id="$Apache::inputtags::part.$Apache::inputtags::response[-1]";  
  if ($target eq 'analyze') {   if ($target eq 'analyze') {
     push (@{ $Apache::lonhomework::analyze{"parts"} },$part_id);      push (@{ $Apache::lonhomework::analyze{"parts"} },$part_id);
     $Apache::lonhomework::analyze{"$part_id.type"} = $$tagstack[-1];      $Apache::lonhomework::analyze{"$part_id.type"} = $tag;
       my (@incorrect)=&Apache::lonxml::get_param_var('incorrect',$parstack,$safeeval);
       if ($#incorrect eq 0) { @incorrect=(split(/,/,$incorrect[0])); }
       push (@{ $Apache::lonhomework::analyze{"$part_id.incorrect"} }, @incorrect);
       &Apache::response::check_if_computed($token,$parstack,
    $safeeval,'answer');
  }   }
  &Apache::response::setup_params($$tagstack[-1]);   if (scalar(@$tagstack)) {
  my (@answers)=&Apache::lonxml::get_param_var('answer',$parstack,$safeeval);      &Apache::response::setup_params($tag,$safeeval);
    }
    &add_in_tag_answer($parstack,$safeeval);
  my (@formats)=&Apache::lonxml::get_param_var('format',$parstack,$safeeval);   my (@formats)=&Apache::lonxml::get_param_var('format',$parstack,$safeeval);
   
  my $unit=&Apache::lonxml::get_param_var('unit',$parstack,$safeeval);   my $unit=&Apache::lonxml::get_param_var('unit',$parstack,$safeeval);
  my $type=&Apache::lonxml::get_param('type',$parstack,$safeeval);  
   
  if ($target eq 'answer') {   if ($target eq 'answer') {
     $result.=&Apache::response::answer_header($$tagstack[-1]);      $result.=&Apache::response::answer_header($tag,undef,
         scalar(keys(%answer)));
       if ($tag eq 'numericalresponse'
    && $Apache::lonhomework::type eq 'exam') {
    my ($bubble_values,undef,$correct) = &make_numerical_bubbles($partid,
        $id,$target,$parstack,$safeeval);
    $result.=&Apache::response::answer_part($tag,$correct);
       }
  }   }
  for(my $i=0;$i<=$#answers;$i++) {   foreach my $name (sort(keys(%answer))) {
     my $ans=$answers[$i];      my @answers = @{ $answer{$name}{'answers'} };
     my $fmt=$formats[0];      if ($target eq 'analyze') {
     if (@formats && $#formats) {$fmt=$formats[$i];}   foreach my $info ('answer','ans_high','ans_low','format') {
     my ($high,$low);      $Apache::lonhomework::analyze{"$part_id.$info"}{$name}=[];
     if ($Apache::inputtags::params{'tol'}) {   }
  ($high,$low)=&get_tolrange($ans,$Apache::inputtags::params{'tol'});      }
     }      my ($sigline,$tolline);
     my ($sighigh,$siglow);      if ($name ne $tag_internal_answer_name 
     if ($Apache::inputtags::params{'sig'}) {   || scalar(keys(%answer)) > 1) {
  ($sighigh,$siglow)=&get_sigrange($Apache::inputtags::params{'sig'});   $result.=&Apache::response::answer_part($tag,$name);
     }      }
     if ($fmt && $$tagstack[-1] eq 'numericalresponse') {      for(my $i=0;$i<=$#answers;$i++) {
  $fmt=~s/e/E/g;   my $ans=$answers[$i];
  $ans = sprintf('%.'.$fmt,$ans);   my $fmt=$formats[0];
  if ($high) {   if (@formats && $#formats) {$fmt=$formats[$i];}
     $high=sprintf('%.'.$fmt,$high);   my ($sighigh,$siglow);
     $low =sprintf('%.'.$fmt,$low);   if ($Apache::inputtags::params{'sig'}) {
  }      ($sighigh,$siglow)=&get_sigrange($Apache::inputtags::params{'sig'});
     }   }
     if ($target eq 'answer') {   my @vector;
  if ($high && $$tagstack[-1] eq 'numericalresponse') { $ans.=' ['.$low.','.$high.']'; }   if (ref($ans)) {
  if ($sighigh && $$tagstack[-1] eq 'numericalresponse') {      @vector = @{ $ans };
     if ($ENV{'form.answer_output_mode'} eq 'tex') {   } else {
  $ans.= " Sig $siglow - $sighigh";      @vector = ($ans);
     } else {   }
  $ans.= " Sig <i>$siglow - $sighigh</i>";   my @all_answer_info;
    foreach my $element (@vector) {
       my ($high,$low);
       if ($Apache::inputtags::params{'tol'}) {
    ($high,$low)=&get_tolrange($element,$Apache::inputtags::params{'tol'});
       }
       if ($target eq 'answer') {
    if ($fmt && $tag eq 'numericalresponse') {
       $fmt=~s/e/E/g;
       if ($unit=~/\$/) { $fmt="\$".$fmt; $unit=~s/\$//g; }
       if ($unit=~/\,/) { $fmt="\,".$fmt; $unit=~s/\,//g; }
       $element = &format_number($element,$fmt,$target,$safeeval);
       #if ($high) {
       #    $high=&format_number($high,$fmt,$target,$safeeval);
       #    $low =&format_number($low,$fmt,$target,$safeeval);
       #}
    }
    if ($high && $tag eq 'numericalresponse') {
       $element.=': ['.$low.','.$high.']';
       $tolline .= "[$low, $high]";
    }
    if (defined($sighigh) && $tag eq 'numericalresponse') {
       if ($env{'form.answer_output_mode'} eq 'tex') {
    $element.= ": Sig $siglow - $sighigh";
       } else {
    $element.= " Sig <i>$siglow - $sighigh</i>";
    $sigline .= "[$siglow, $sighigh]";
       }
    }
    push(@all_answer_info,$element);
   
       } elsif ($target eq 'analyze') {
    push (@{ $Apache::lonhomework::analyze{"$part_id.answer"}{$name}[$i] }, $element);
    if ($high) {
       push (@{ $Apache::lonhomework::analyze{"$part_id.ans_high"}{$name}[$i] }, $high);
       push (@{ $Apache::lonhomework::analyze{"$part_id.ans_low"}{$name}[$i] }, $low);
    }
    if ($fmt) {
       push (@{ $Apache::lonhomework::analyze{"$part_id.format"}{$name}[$i] }, $fmt);
    }
     }      }
  }   }
  $result.=&Apache::response::answer_part($$tagstack[-1],$ans);   if ($target eq 'answer') {
     } elsif ($target eq 'analyze') {      $result.= &Apache::response::answer_part($tag,join('; ',@all_answer_info));
  push (@{ $Apache::lonhomework::analyze{"$part_id.answer"} }, $ans);  
  if ($high) {  
     push (@{ $Apache::lonhomework::analyze{"$part_id.ans_high"} }, $high);  
     push (@{ $Apache::lonhomework::analyze{"$part_id.ans_low"} }, $low);  
  }   }
     }      }
  }  
  if (defined($unit) and ($unit ne '') and      my @fmt_ans;
     $$tagstack[-1] eq 'numericalresponse') {      for(my $i=0;$i<=$#answers;$i++) {
     if ($target eq 'answer') {   my $ans=$answers[$i];
  if ($ENV{'form.answer_output_mode'} eq 'tex') {   my $fmt=$formats[0];
     $result.=&Apache::response::answer_part($$tagstack[-1],   if (@formats && $#formats) {$fmt=$formats[$i];}
     " Unit: $unit ");   foreach my $element (@$ans) {    
  } else {      if ($fmt && $tag eq 'numericalresponse') {
     $result.=&Apache::response::answer_part($$tagstack[-1],   $fmt=~s/e/E/g;
     "Unit: <b>$unit</b>");   if ($unit=~/\$/) { $fmt="\$".$fmt; $unit=~s/\$//g; }
    if ($unit=~/\,/) { $fmt="\,".$fmt; $unit=~s/\,//g; }
    $element = &format_number($element,$fmt,$target,
     $safeeval);
    if ($fmt=~/\$/ && $unit!~/\$/) { $element=~s/\$//; }
       }
  }   }
     } elsif ($target eq 'analyze') {   push(@fmt_ans,join(',',@$ans));
  push (@{ $Apache::lonhomework::analyze{"$part_id.unit"} }, $unit);  
     }      }
  }      my $response=\@fmt_ans;
  if ($type || $$tagstack[-1] eq 'stringresponse') {  
     my $string='Case Insensitive';      my $hideunit=&Apache::lonnet::EXT('resource.'.$partid.'_'.
     if ($type eq 'mc') {        $id.'.turnoffunit');
  $string='Multiple Choice';      if ($unit ne ''  && 
     } elsif ($type eq 'cs') {   ! ($Apache::lonhomework::type eq 'exam' ||
  $string='Case Sensitive';     lc($hideunit) eq "yes") )  {
     } elsif ($type eq 'ci') {   my $cleanunit=$unit;
  $string='Case Insensitive';   $cleanunit=~s/\$\,//g;
     } elsif ($type eq 'fml') {   foreach my $ans (@fmt_ans) {
  $string='Formula';      $ans.=" $cleanunit";
     }   }
     if ($target eq 'answer') {      }
  if ($ENV{'form.answer_output_mode'} eq 'tex') {      my ($ad,$msg)=&check_submission($response,$partid,$id,$tag,
     $result.=&Apache::response::answer_part($$tagstack[-1],      $parstack,$safeeval);
   "$string");      if ($ad ne 'EXACT_ANS' && $ad ne 'APPROX_ANS') {
    my $error;
    if ($tag eq 'formularesponse') {
       $error=&mt('Computer\'s answer is incorrect ("[_1]").',join(', ',@$response));
  } else {   } else {
     $result.=&Apache::response::answer_part($$tagstack[-1],      # answer failed check if it is sig figs that is failing
     "<b>$string</b>");      my ($ad,$msg)=&check_submission($response,$partid,$id,
       $tag,$parstack,
       $safeeval,1);
       if ($sigline ne '') {
    $error=&mt('Computer\'s answer is incorrect ("[_1]"). It is likely that the tolerance range [_2] or significant figures [_3] need to be adjusted.',join(', ',@$response),$tolline,$sigline);
       } else {
    $error=&mt('Computer\'s answer is incorrect ("[_1]"). It is likely that the tolerance range [_2] needs to be adjusted.',join(', ',@$response),$tolline);
       }
    }
    if ($ad ne 'EXACT_ANS' && $ad ne 'APPROX_ANS') {
       &Apache::lonxml::error($error);
    } else {
       &Apache::lonxml::warning($error);
  }   }
     } elsif ($target eq 'analyze') {  
  push (@{ $Apache::lonhomework::analyze{"$part_id.str_type"} },  
       $type);  
     }      }
  }  
  if ($$tagstack[-1] eq 'formularesponse' && $target eq 'answer') {      if (defined($unit) and ($unit ne '') and
     my $samples=&Apache::lonxml::get_param('samples',$parstack,$safeeval);   $tag eq 'numericalresponse') {
     $result.=&Apache::response::answer_part($$tagstack[-1],$samples);   if ($target eq 'answer') {
       if ($env{'form.answer_output_mode'} eq 'tex') {
    $result.=&Apache::response::answer_part($tag,
    " Unit: $unit ");
       } else {
    $result.=&Apache::response::answer_part($tag,
    "Unit: <b>$unit</b>");
       }
    } elsif ($target eq 'analyze') {
       push (@{ $Apache::lonhomework::analyze{"$part_id.unit"} }, $unit);
    }
       }
       if ($tag eq 'formularesponse' && $target eq 'answer') {
    my $samples=&Apache::lonxml::get_param('samples',$parstack,$safeeval);
    $result.=&Apache::response::answer_part($tag,$samples);
       }
       $result.=&Apache::response::next_answer($tag,$name);
  }   }
  if ($target eq 'answer') {   if ($target eq 'answer') {
     $result.=&Apache::response::answer_footer($$tagstack[-1]);      $result.=&Apache::response::answer_footer($tag);
  }   }
     }      }
     if ($target eq 'grade' || $target eq 'web' || $target eq 'answer' ||      if ($target eq 'grade' || $target eq 'web' || $target eq 'answer' || 
  $target eq 'tex' || $target eq 'analyze') {   $target eq 'tex' || $target eq 'analyze') {
  &Apache::lonxml::increment_counter($increment);          if (($tag eq 'formularesponse') && ($target eq 'analyze')) {
               my $type = &Apache::lonnet::EXT('resource.'.$partid.'_'.$id.'.type');
               if ($type eq 'exam') {
                   $increment = &Apache::response::repetition();
               }
           }
    &Apache::lonxml::increment_counter($increment,"$partid.$id");
    if ($target eq 'analyze') {
       &Apache::lonhomework::set_bubble_lines();
    }
     }      }
     &Apache::response::end_response;      &Apache::response::end_response();
     return $result;      return $result;
 }  }
   
   sub format_prior_response_numerical {
       my ($mode,$answer) = @_;
       if (ref($answer)) {
    my $result = '<table class="LC_prior_numerical"><tr>';
    foreach my $element (@{ $answer }) {
       $result.= '<td><span class="LC_prior_numerical">'.
    &HTML::Entities::encode($element,'"<>&').'</span></td>';
    }
    $result.='</tr></table>';
    return $result;
       }
       return '<span class="LC_prior_numerical">'.
       &HTML::Entities::encode($answer,'"<>&').'</span>';
   
   }
   
   sub check_for_answer_errors {
       my ($parstack,$safeeval) = @_;
       &add_in_tag_answer($parstack,$safeeval);
       my %counts;
       foreach my $name (keys(%answer)) {
    push(@{$counts{scalar(@{$answer{$name}{'answers'}})}},$name);
       }
       if (scalar(keys(%counts)) > 1) {
    my $counts = join(' ',map {
       my $count = $_;
       &mt("Answers [_1] had [_2] components.",
    '<tt>'.join(', ',@{$counts{$count}}).'</tt>',
    $count);
    } (sort(keys(%counts))));
    &Apache::lonxml::error(&mt("All answers must have the same number of components. Varying numbers of answers were seen. ").$counts);
       }
       my $expected_number_of_inputs = (keys(%counts))[0];
       if ( $expected_number_of_inputs > 0 
    && $expected_number_of_inputs != scalar(@Apache::inputtags::inputlist)) {
    &Apache::lonxml::error(&mt("Expected [_1] input fields, but there were only [_2] seen.", 
      $expected_number_of_inputs,
      scalar(@Apache::inputtags::inputlist)));
       }
   }
   
 sub get_table_sizes {  sub get_table_sizes {
     my ($format,$number_of_bubbles)=@_;      my ($number_of_bubbles,$rbubble_values)=@_;
     my $max_val = 0;      my $scale=2; #mm for one digit
     if ($format=~m/^(\d+)E([^\d]*)(\d*)$/) {      my $cell_width=0;
  $max_val=$1+$2+4;      foreach my $member (@$rbubble_values) {
    my $cell_width_real=0;
    if ($member=~/(\+|-)?(\d*)\.?(\d*)\s*\$?\\times\s*10\^{(\+|-)?(\d+)}\$?/) {
       $cell_width_real=(length($2)+length($3)+length($5)+7)*$scale;
    } elsif ($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)*$scale*0.9;
    }
    if ($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 {      } else {
  $max_val=4;   $env{'form.textwidth'}=~/(\d+)\.?(\d*)/;
    $textwidth=$1.'.'.$2;
       }
       my $bubbles_per_line=int($textwidth/$cell_width);
       if ($bubbles_per_line > $number_of_bubbles) {
    $bubbles_per_line=$number_of_bubbles;
       } elsif (($bubbles_per_line > $number_of_bubbles/2) 
        && ($number_of_bubbles % 2==0)) {
    $bubbles_per_line=$number_of_bubbles/2;
       }
       if ($bubbles_per_line < 1) {
    $bubbles_per_line=1;
     }      }
     $max_val = int(0.9*$ENV{'form.textwidth'}/(($max_val+6)*2));      my $number_of_tables = int($number_of_bubbles/$bubbles_per_line);
     my $celllength = 0.9*$ENV{'form.textwidth'}/$max_val-10;  
     my @table_range = ();      my @table_range = ();
     my $number_of_tables = int($number_of_bubbles/$max_val);      for (my $i=0;$i<$number_of_tables;$i++) {push @table_range,$bubbles_per_line;}
     for (my $i=0;$i<$number_of_tables;$i++) {push @table_range,$max_val;}      if ($number_of_bubbles % $bubbles_per_line) {
     if ($number_of_bubbles % $max_val != 0) {  
  $number_of_tables++;   $number_of_tables++;
  push @table_range,($number_of_bubbles % $max_val);   push @table_range,($number_of_bubbles % $bubbles_per_line);
     }      }
     return ($celllength,$number_of_tables,@table_range);      $cell_width-=8;
       $cell_width=$cell_width*3/4;
       return ($cell_width,$number_of_tables,@table_range);
 }  }
   
 sub format_number {  sub format_number {
     my ($number,$format,$target)=@_;      my ($number,$format,$target,$safeeval)=@_;
     my $ans;      my $ans;
     if ($format ne '') {      if ($format eq '') {
  $format=~s/e/E/g;  
  $ans = sprintf('%.'.$format,$number);  
     } else {  
  my $format = '';  
  #What is the number? (integer,decimal,floating point)   #What is the number? (integer,decimal,floating point)
  if ($number=~/^(\d*\.?\d*)(E|e)(\d*)$/) {   if ($number=~/^(\d*\.?\d*)(E|e)[+\-]?(\d*)$/) {
     if (abs($3)>=100) {$format = 'e3';} else {$format = 'e2';}      $format = '3e';
  } elsif ($number=~/^(\d*)\.(\d*)$/) {   } elsif ($number=~/^(\d*)\.(\d*)$/) {
     $format = '4f';      $format = '4f';
  } elsif ($number=~/^(\d*)$/) {   } elsif ($number=~/^(\d*)$/) {
     $format = 'd';      $format = 'd';
  }   }
  $ans = sprintf('%.'.$format,$number);  
     }      }
     if ($target eq 'tex') {      if (!$Apache::lonxml::default_homework_loaded) {
  if ($ans =~ m/([0-9\.\-\+]+)E([0-9\-\+]+)/ ) {   &Apache::lonxml::default_homework_load($safeeval);
     my $number = $1;  
     my $power = $2;  
     $power=~s/^\+//;  
     $power=~s/^(-?)0+(\d+)//;  
     $ans=$number.'$\times 10^{'.$1.$2.'}$'; #'stupidemacs  
  }  
     }      }
       $ans=&Apache::run::run("&prettyprint(q\0$number\0,q\0$format\0,q\0$target\0)",$safeeval);
     return $ans;      return $ans;
 }  }
   
 sub make_numerical_bubbles {  sub make_numerical_bubbles {
     my ($number_of_bubbles,$target,$answer,$format) =@_;      my ($part,$id,$target,$parstack,$safeeval) =@_;
     my @bubble_values = ();  
       if (!%answer) {
    &Apache::lonxml::error(&mt("No answers defined for response [_1] in part [_2] to make bubbles for.",$id,$part));
    return ([],[],undef);
       }
       
       my $number_of_bubbles = 
    &Apache::response::get_response_param($part.'_'.$id,'numbubbles',8);
   
       my ($format)=&Apache::lonxml::get_param_var('format',$parstack,$safeeval);
       my $name = (exists($answer{$tag_internal_answer_name}) 
    ? $tag_internal_answer_name
    : (sort(keys(%answer)))[0]);
   
       if ( scalar(@{$answer{$name}{'answers'}}) > 1) {
    &Apache::lonxml::error("Only answers with 1 component are supported in exam mode");
       }
       if (scalar(@{$answer{$name}{'answers'}[0]}) > 1) {
    &Apache::lonxml::error("Vector answers are unsupported in exam mode.");
       }
   
       my $answer = $answer{$name}{'answers'}[0][0];
       my (@incorrect)=&Apache::lonxml::get_param_var('incorrect',$parstack,
      $safeeval);
       if ($#incorrect eq 0) { @incorrect=(split(/,/,$incorrect[0])); }
       
       my @bubble_values=();
       my @alphabet=('A'..'Z');
   
       &Apache::lonxml::debug("answer is $answer incorrect is @incorrect");
       my @oldseed=&Math::Random::random_get_seed();
       if (@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.": which are :".join(':',@bubble_values));
       &Math::Random::random_set_seed(@oldseed);
   
       my $correct;
       for(my $i=0; $i<=$#bubble_values;$i++) {
    if ($bubble_values[$i] eq $answer) {
       $correct = $alphabet[$i];
       last;
    }
       }
   
       if (defined($format) && $format ne '') {
    my @bubble_display;
    foreach my $value (@bubble_values) {
       push(@bubble_display,
    &format_number($value,$format,$target,$safeeval));
    }
    return (\@bubble_values,\@bubble_display,$correct);
       } else {
    return (\@bubble_values,\@bubble_values,$correct);
       }
    }
    if (defined($incorrect[0]) &&
       scalar(@incorrect)+1 < $number_of_bubbles) {
       &Apache::lonxml::warning("Not enough incorrect answers were specified in the incorrect array, ignoring the specified incorrect answers and instead generating them (".join(',',@incorrect).").");
    }
       }
     my @factors = (1.13,1.17,1.25,1.33,1.45); #default values of factors      my @factors = (1.13,1.17,1.25,1.33,1.45); #default values of factors
     my @powers = (1.0,2.0,3.0,4.0,5.0,6.0,7.0,8.0); #default values for powers      my @powers = (1..$number_of_bubbles);
     &Apache::response::setrandomnumber();      &Apache::response::setrandomnumber();
     my $ind=&Math::Random::random_uniform_integer(1,0,$#powers);      my $ind=&Math::Random::random_uniform_integer(1,0,$#powers);
     my $power = $powers[$ind];      my $power = $powers[$ind];
     $ind=&Math::Random::random_uniform_integer(1,0,$#factors);      $ind=&Math::Random::random_uniform_integer(1,0,$#factors);
     my $factor = $factors[$ind];      my $factor = $factors[$ind];
       my @bubble_display;
       my $answerfactor=$answer;
       if ($answer==0) { 
          $answerfactor=&Math::Random::random_uniform_integer(1,1,100)/
                        &Math::Random::random_uniform_integer(1,1,10);
       }
     for ($ind=0;$ind<$number_of_bubbles;$ind++) {      for ($ind=0;$ind<$number_of_bubbles;$ind++) {
  $bubble_values[$ind] = $answer*($factor**($power-$powers[$#powers-$ind]));   $bubble_values[$ind] = $answerfactor*($factor**($power-$powers[$#powers-$ind]));
  $bubble_values[$ind] = &format_number($bubble_values[$ind],   $bubble_display[$ind] = &format_number($bubble_values[$ind],
        $format,$target);         $format,$target,$safeeval);
       }
       my $correct = $alphabet[$number_of_bubbles-$power];
       if ($answer==0) {
          $correct='A';
          $bubble_values[0]=0;
          $bubble_display[0] = &format_number($bubble_values[0],
                                              $format,$target,$safeeval);
     }      }
     return @bubble_values;      &Math::Random::random_set_seed(@oldseed);
       return (\@bubble_values,\@bubble_display,$correct);
 }  }
   
 sub get_tolrange {  sub get_tolrange {
Line 467  sub get_tolrange { Line 1026  sub get_tolrange {
   
 sub get_sigrange {  sub get_sigrange {
     my ($sig)=@_;      my ($sig)=@_;
     &Apache::lonxml::debug("Got a sig of :$sig:");      #&Apache::lonxml::debug("Got a sig of :$sig:");
       my $courseid=$env{'request.course.id'};
       if ($env{'request.state'} ne 'construct'
    && lc($env{"course.$courseid.disablesigfigs"}) eq 'yes') {
    return (15,0);
       }
     my $sig_lbound;      my $sig_lbound;
     my $sig_ubound;      my $sig_ubound;
     if ($sig eq '') {      if ($sig eq '') {
Line 475  sub get_sigrange { Line 1039  sub get_sigrange {
  $sig_ubound =15; #SIG_UB_DEFAULT   $sig_ubound =15; #SIG_UB_DEFAULT
     } else {      } else {
  ($sig_lbound,$sig_ubound) = split(/,/,$sig);   ($sig_lbound,$sig_ubound) = split(/,/,$sig);
  if (!$sig_lbound) {   if (!defined($sig_lbound)) {
     $sig_lbound = 0; #SIG_LB_DEFAULT      $sig_lbound = 0; #SIG_LB_DEFAULT
     $sig_ubound =15; #SIG_UB_DEFAULT      $sig_ubound =15; #SIG_UB_DEFAULT
  }   }
  if (!$sig_ubound) { $sig_ubound=$sig_lbound; }   if (!defined($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);      return ($sig_ubound,$sig_lbound);
 }  }
   
   sub format_prior_response_string {
       my ($mode,$answer) =@_;
       return '<span class="LC_prior_string">'.
       &HTML::Entities::encode($answer,'"<>&').'</span>';
   }
   
 sub start_stringresponse {  sub start_stringresponse {
     my ($target,$token,$tagstack,$parstack,$parser,$safeeval,$style)=@_;      my ($target,$token,$tagstack,$parstack,$parser,$safeeval,$style)=@_;
     my $result;      my $result;
       my $id = &Apache::response::start_response($parstack,$safeeval);
     if ($target eq 'meta') {      if ($target eq 'meta') {
  &Apache::response::start_response($parstack,$safeeval);  
  $result=&Apache::response::meta_package_write('stringresponse');   $result=&Apache::response::meta_package_write('stringresponse');
  &Apache::response::end_response();      } elsif ($target eq 'edit') {
     } else {   $result.=&Apache::edit::tag_start($target,$token);
  $result.=&start_numericalresponse(@_);   $result.=&Apache::edit::text_arg('Answer:','answer',$token);
    $result.=&Apache::edit::select_arg('Type:','type',
    [['cs','Case Sensitive'],['ci','Case Insensitive'],
     ['mc','Case Insensitive, Any Order'],
     ['re','Regular Expression']],$token);
    $result.=&Apache::edit::text_arg('String to display for answer:',
    'answerdisplay',$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 'web') {
    if (  &Apache::response::show_answer() ) {
       my $answer=
          &Apache::lonxml::get_param('answerdisplay',$parstack,$safeeval);
       if (!defined $answer || $answer eq '') {
    $answer=
       &Apache::lonxml::get_param('answer',$parstack,$safeeval);
       }
       $Apache::inputtags::answertxt{$id}=[$answer];
    } 
       } elsif ($target eq 'answer' || $target eq 'grade') {
    &Apache::response::reset_params();
     }      }
     return $result;      return $result;
 }  }
   
 sub end_stringresponse {  sub end_stringresponse {
     return end_numericalresponse(@_);      my ($target,$token,$tagstack,$parstack,$parser,$safeeval,$style)=@_;
   
       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 ( $target eq 'grade' && &Apache::response::submitted() ) {
    &Apache::response::setup_params('stringresponse',$safeeval);
    $safeeval->share_from('capa',['&caparesponse_capa_check_answer']);
    if ($Apache::lonhomework::type eq 'exam' ||
       &Apache::response::submitted('scantron')) {
       &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,$msg);
    if ($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::response')}=$response;
       $result = &Apache::run::run('if ($LONCAPA::response=~m'.$answer.') { return 1; } else { return 0; }',$safeeval);
       &Apache::lonxml::debug("current $response");
       &Apache::lonxml::debug("current $answer");
       $ad = ($result) ? 'APPROX_ANS' : 'INCORRECT';
    } else {
       my @args = ('type');
       my $args_ref = &setup_capa_args($safeeval,$parstack,
       \@args,$response);
   
       &add_in_tag_answer($parstack,$safeeval);
       my (@final_awards,@final_msgs,@names);
       foreach my $name (keys(%answer)) {
    &Apache::lonxml::debug(" doing $name with ".join(':',@{ $answer{$name}{'answers'} }));
    ${$safeeval->varglob('LONCAPA::CAPAresponse_answer')}=dclone($answer{$name});
    my ($result, @msgs)=&Apache::run::run("&caparesponse_check_list()",$safeeval);
    &Apache::lonxml::debug('msgs are'.join(':',@msgs));
    my ($awards)=split(/:/,$result);
    my (@awards) = split(/,/,$awards);
    ($ad,$msg) = 
       &Apache::inputtags::finalizeawards(\@awards,\@msgs);
    push(@final_awards,$ad);
    push(@final_msgs,$msg);
    push(@names,$name);
    &Apache::lonxml::debug("\n<br>result:$result:$Apache::lonxml::curdepth<br>\n");
       }
       my ($ad, $msg, $name) = 
    &Apache::inputtags::finalizeawards(\@final_awards,
      \@final_msgs,
      \@names,1);
    }
    if ($Apache::lonhomework::type eq 'survey' &&
       ($ad eq 'INCORRECT' || $ad eq 'APPROX_ANS' ||
        $ad eq 'EXACT_ANS')) {
       $ad='SUBMITTED';
    }
    &Apache::response::handle_previous(\%previous,$ad);
    $Apache::lonhomework::results{"resource.$part.$id.awarddetail"}=$ad;
    $Apache::lonhomework::results{"resource.$part.$id.awardmsg"}=$msg;
       }
    }
       } elsif ($target eq 'answer' || $target eq 'analyze') {
    &add_in_tag_answer($parstack,$safeeval);
    if ($target eq 'analyze') {
       push (@{ $Apache::lonhomework::analyze{"parts"} },"$part.$id");
       $Apache::lonhomework::analyze{"$part.$id.type"} = 'stringresponse';
       &Apache::response::check_if_computed($token,$parstack,$safeeval,
    'answer');
    }
    &Apache::response::setup_params('stringresponse',$safeeval);
    if ($target eq 'answer') {
       $result.=&Apache::response::answer_header('stringresponse');
    }
    foreach my $name (keys(%answer)) {
       my @answers = @{ $answer{$name}{'answers'} };
       for (my $i=0;$i<=$#answers;$i++) {
    my $answer_part = $answers[$i];
    foreach my $element (@{$answer_part}) {
       if ($target eq 'answer') {
    $result.=&Apache::response::answer_part('stringresponse',
    $element);
       } elsif ($target eq 'analyze') {
    push (@{ $Apache::lonhomework::analyze{"$part.$id.answer"}{$name}[$i] },
         $element);
       }
    }
    if ($target eq 'answer' && $type eq 're') {
       $result.=&Apache::response::answer_part('stringresponse',
       $answerdisplay);
    }
       }
    }
    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') {
    $result.='</td></tr>'.&Apache::edit::end_table;
       } elsif ($target eq 'web' || $target eq 'tex') {
    &Apache::response::setup_prior_tries_hash(\&format_prior_response_string);
       }
       if ($target eq 'grade' || $target eq 'web' || $target eq 'answer' || 
    $target eq 'tex' || $target eq 'analyze') {
    &Apache::lonxml::increment_counter(&Apache::response::repetition(),
      "$part.$id");
    if ($target eq 'analyze') {
       &Apache::lonhomework::set_bubble_lines();
    }
       }
       &Apache::response::end_response;
       return $result;
 }  }
   
 sub start_formularesponse {  sub start_formularesponse {
Removed from v.1.112  
changed lines
  Added in v.1.223

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