[BACK]Return to caparesponse.pm CVS log [TXT] [DIR] Up to [LON-CAPA] / loncom / homework / caparesponse

Diff for /loncom/homework/caparesponse/caparesponse.pm between versions 1.77 and 1.221

version 1.77, 2003/02/23 20:31:51 version 1.221, 2008/02/01 23:00:56
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'));
 }  }
   
 sub start_caparesponse {  my %answer;
   my ($target,$token,$tagstack,$parstack,$parser,$safeeval)=@_;  my @answers;
   my $id = &Apache::response::start_response($parstack,$safeeval);  sub get_answer { return %answer; };
   return '';  sub push_answer{ push(@answers,dclone(\%answer)); undef(%answer) }
 }  sub pop_answer { %answer = %{pop(@answers)}; };
   
 sub end_caparesponse {  my $cur_name;
   my ($target,$token,$tagstack,$parstack,$parser,$safeeval,$style)=@_;  my $tag_internal_answer_name = 'INTERNAL';
   my $result = '';  
   if ( $target eq 'grade' ) {  sub start_answer {
     if ( defined $ENV{'form.submitted'}) {      my ($target,$token,$tagstack,$parstack,$parser,$safeeval)=@_;
       $safeeval->share_from('capa',['&caparesponse_capa_check_answer']);      my $result;
       my $response = $ENV{'form.HWVAL'.$Apache::inputtags::response['-1']};      $cur_name = &Apache::lonxml::get_param('name',$parstack,$safeeval);
       if ( $response =~ /[^\s]/) {      if ($cur_name =~ /^\s*$/) { $cur_name = $Apache::lonxml::curdepth; }
  my $id = $Apache::inputtags::response['-1'];      my $type = &Apache::lonxml::get_param('type',$parstack,$safeeval);
  my $previous= &Apache::response::check_for_previous($response,$id,$response);      if (!defined($type) && $tagstack->[-2] eq 'answergroup') {
  if ( $previous ) {    $type = &Apache::lonxml::get_param('type',$parstack,$safeeval,-2);
   $result = 'PREVIOUSLY_USED';      }
  } else {      if (!defined($type)) { $type = 'ordered' };
   $Apache::lonhomework::results{"resource.$Apache::inputtags::part.$id.submission"}=$response;      $answer{$cur_name}= { 'type' => $type,
   &Apache::lonxml::debug("submitted a $response<br>\n");    'answers' => [] };
   &Apache::lonxml::debug($$parstack[$#$parstack] . "\n<br>");      if ($target eq 'edit') {
   my $expression="&caparesponse_check('".$response."','".    $result.=&Apache::edit::tag_start($target,$token);
     $$parstack[$#$parstack].   $result.=&Apache::edit::text_arg('Name:','name',$token);
       ';my $tol="'.$Apache::inputtags::params{'tol'}.'"'.   $result.=&Apache::edit::select_arg('Type:','type',
  ';my $sig="'.$Apache::inputtags::params{'sig'}.'"'.     [['ordered',  'Ordered'  ],
   "');";      ['unordered','Unordered'],],
   $result = &Apache::run::run($expression,$safeeval);     $token);
   my ($ad) = split /:/ , $result;   $result.=&Apache::edit::end_row().&Apache::edit::start_spanning_row();
   $Apache::lonhomework::results{"resource.$Apache::inputtags::part.$id.awarddetail"}=$ad;      } elsif ($target eq 'modified') {
   &Apache::lonxml::debug("$expression");   my $constructtag = &Apache::edit::get_new_args($token,$parstack,
   &Apache::lonxml::debug("\n<br>result:$result:$Apache::lonxml::curdepth<br>\n");         $safeeval,'name',
  }         'type');
       }   if ($constructtag) {
     }      $result = &Apache::edit::rebuild_tag($token);
   } elsif ($target eq 'web') {      $result.= &Apache::edit::handle_insert();
     #$result .= "The correct answer is ".&Apache::run::run("{$$parstack['-1'];".'return $answer}',$safeeval)."\n";   }
   }      }
   #Apache::lonxml::debug("\n<br>\nreal end caparesponse<br>\n");      return $result;
   &Apache::response::end_response;  
   return '';  
 }  }
   
 sub start_numericalresponse {  sub end_answer {
   my ($target,$token,$tagstack,$parstack,$parser,$safeeval)=@_;      my ($target,$token,$tagstack,$parstack,$parser,$safeeval)=@_;
   my $id = &Apache::response::start_response($parstack,$safeeval);      my $result;
   my $result;      if ($target eq 'edit') {
   if ($target eq 'edit') {   $result .= &Apache::edit::tag_end();
     $result.=&Apache::edit::tag_start($target,$token);      }
     $result.=&Apache::edit::text_arg('Answer:','answer',$token);  
     if ($token->[1] eq 'numericalresponse') {      undef($cur_name);
       $result.=&Apache::edit::text_arg('Unit:','unit',$token,5).      return $result;
                          &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 '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') {  
       $result.=&Apache::edit::text_arg('Sample Points:','samples',$token,40);  
     }  
     $result.=&Apache::edit::end_row().&Apache::edit::start_spanning_row();  
   } elsif ($target eq 'modified') {  
     my $constructtag;  
     if ($token->[1] eq 'numericalresponse') {  
       $constructtag=&Apache::edit::get_new_args($token,$parstack,$safeeval,  
  'answer','unit','format');  
     } elsif ($token->[1] eq 'stringresponse') {  
       $constructtag=&Apache::edit::get_new_args($token,$parstack,$safeeval,  
  'answer','type');  
     } 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();  
   }  
   return $result;  
 }  }
   
 sub end_numericalresponse {  sub insert_answer {
   my ($target,$token,$tagstack,$parstack,$parser,$safeeval,$style)=@_;      return '
   my $result = '';          <answer>
   if (!$Apache::lonxml::default_homework_loaded) {              <value></value>
       &Apache::lonxml::default_homework_load($safeeval);          </answer>';
   }  }
   if ( $target eq 'grade' ) {  
     if ( defined $ENV{'form.submitted'}) {  sub start_answergroup {
       &Apache::response::setup_params($$tagstack[-1]);      my ($target,$token,$tagstack,$parstack,$parser,$safeeval)=@_;
       $safeeval->share_from('capa',['&caparesponse_capa_check_answer']);      my $result;
       my $partid = $Apache::inputtags::part;      if ($target eq 'edit') {
       my $id = $Apache::inputtags::response['-1'];    $result.=&Apache::edit::tag_start($target,$token);
       my $response = $ENV{'form.HWVAL'.$id};   $result.=&Apache::edit::select_arg('Type:','type',
       if ( $response =~ /[^\s]/) {     [['ordered',  'Ordered'  ],
  my %previous = &Apache::response::check_for_previous($response,$partid,$id);      ['unordered','Unordered'],],
  $Apache::lonhomework::results{"resource.$partid.$id.submission"}=$response;     $token);
  &Apache::lonxml::debug("submitted a $response<br>\n");   $result.=&Apache::edit::end_row().&Apache::edit::start_spanning_row();
  &Apache::lonxml::debug($$parstack[$#$parstack] . "\n<br>");      } elsif ($target eq 'modified') {
  $response =~ s/\\/\\\\/g;   my $constructtag = &Apache::edit::get_new_args($token,$parstack,
  $response =~ s/\'/\\\'/g;         $safeeval,'name',
  &Apache::lonxml::debug("current $response");         'type');
  my $expression="&caparesponse_check_list('".$response."','".   if ($constructtag) {
   $$parstack[$#$parstack];      $result = &Apache::edit::rebuild_tag($token);
  foreach my $key (keys(%Apache::inputtags::params)) {      $result.= &Apache::edit::handle_insert();
   $expression.= ';my $'. #'   }
     $key.'="'.$Apache::inputtags::params{$key}.'"';      }
  }      return $result;
  if ($$tagstack[-1] eq 'formularesponse') {  }
   $expression.=';my $type="fml";';  
  } elsif ($$tagstack[-1] eq 'numericalresponse') {  sub end_answergroup {
   $expression.=';my $type="float";';      my ($target,$token,$tagstack,$parstack,$parser,$safeeval)=@_;
  }      my $result;
  $expression.="');";      if ($target eq 'web') {
  $result = &Apache::run::run($expression,$safeeval);      if (  &Apache::response::show_answer() ) {  
  my ($awards) = split /:/ , $result;      my $partid = $Apache::inputtags::part;
  my ($ad) = &Apache::inputtags::finalizeawards(split /,/ , $awards);      my $id = $Apache::inputtags::response[-1];
  &Apache::response::handle_previous(\%previous,$ad);      &set_answertext($Apache::lonhomework::history{"resource.$partid.$id.answername"},
  $Apache::lonhomework::results{"resource.$partid.$id.awarddetail"}=$ad;      $target,$token,$tagstack,$parstack,$parser,
  &Apache::lonxml::debug("$expression");      $safeeval,-2);
  &Apache::lonxml::debug("\n<br>result:$result:$Apache::lonxml::curdepth<br>\n");   }
  $result='';      } elsif ($target eq 'edit') {
       }   $result .= &Apache::edit::tag_end();
     }      }
   } elsif ($target eq 'web' || $target eq 'tex') {      return $result;
       my $award = $Apache::lonhomework::history{"resource.$Apache::inputtags::part.solved"};  }
       my $status = $Apache::inputtags::status['-1'];  
       if ($award =~ /^correct/ || $status eq "SHOW_ANSWER" ) {  sub insert_answergroup {
  my (@answers)=&Apache::lonxml::get_param_var('answer',$parstack,      return '
      $safeeval);      <answergroup>
  my (@formats)=&Apache::lonxml::get_param_var('format',$parstack,          <answer>
      $safeeval);              <value></value>
  my $unit=&Apache::lonxml::get_param_var('unit',$parstack,$safeeval);          </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 {
       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 $result;
       undef(%answer);
       undef(%{$safeeval->varglob('LONCAPA::CAPAresponse_args')});
       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).
    &Apache::loncommon::help_open_topic('numerical_wrong_answers');
       $result.=&Apache::edit::text_arg('Unit:','unit',$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 $unit) "; }
    }
    if (  &Apache::response::show_answer() ) {
       &set_answertext($tag_internal_answer_name,$target,$token,$tagstack,
       $parstack,$parser,$safeeval,-1);
    }
       }
       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') {   if ($target eq 'web') {
   $result="<br />The correct answer is ";      $answertxt.=" $unit ";
         } elsif ($target eq 'tex') {   }
   #$result='\vskip 0 mm The correct answer is \\texttt{';  
         }   push(@answertxt,$answertxt)
  for (my $i=0; $i <= $#answers; $i++) {      }
    my $answer=$answers[$i];  
    my $format;      my $id = $Apache::inputtags::response[-1];
    if ($#formats > 0) {      $Apache::inputtags::answertxt{$id}=\@answertxt;
      $format=$formats[$i];  }
    } else {  
      $format=$formats[0];  sub setup_capa_args {
    }      my ($safeeval,$parstack,$args,$response) = @_;
    my $formatted;      my $args_ref= \%{$safeeval->varglob('LONCAPA::CAPAresponse_args')};
    if ((defined($format)) && ($format ne '')) {      undef(%{ $args_ref });
      &Apache::lonxml::debug("formatting with :$format: answer :$answer:");   
      $formatted=sprintf('%.'.$format,$answer).',';      foreach my $arg (@{$args}) {
    } else {   $$args_ref{$arg}=
      &Apache::lonxml::debug("no format answer :$answer:");      &Apache::lonxml::get_param($arg,$parstack,$safeeval);
      $formatted="$answer,";      }
    }      foreach my $key (keys(%Apache::inputtags::params)) {
    $$args_ref{$key}=$Apache::inputtags::params{$key};
    if ($target eq 'tex') {      }
        $formatted='';      &setup_capa_response($args_ref,$response);
        #$formatted=&Apache::lonxml::latex_special_symbols($formatted);      return $args_ref;
    }  }
    $result.=$formatted;  
        }  sub setup_capa_response {
    chop $result;      my ($args_ref,$response) = @_;   
    if ($target eq 'web') {  
      $result.=" $unit.<br />";      if (ref($response)) {
    } elsif ($target eq 'tex') {   $$args_ref{'response'}=dclone($response);
      #$result.=&Apache::lonxml::latex_special_symbols($unit);      } else {
      #$result.="}. \\vskip 0 mm ";   $$args_ref{'response'}=dclone([$response]);
    }      }
        }  }
       if ($Apache::lonhomework::type eq 'exam') {  
       my (@answers)=&Apache::lonxml::get_param_var('answer',$parstack,$safeeval);  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 {
       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 $result = '';
       if (!$Apache::lonxml::default_homework_loaded) {
    &Apache::lonxml::default_homework_load($safeeval);
       }
       my $partid = $Apache::inputtags::part;
       my $id = $Apache::inputtags::response[-1];
       my $tag;
       my $safehole = new Safe::Hole;
       $safeeval->share_from('capa',['&caparesponse_capa_check_answer']);
   
       if (scalar(@$tagstack)) { $tag=$$tagstack[-1]; }
       if ( $target eq 'grade' && &Apache::response::submitted() ) {
    &Apache::response::setup_params($tag,$safeeval);
    if ($Apache::lonhomework::type eq 'exam' && 
       (($tag eq 'formularesponse') || ($tag eq 'mathresponse'))) {
       $increment=&Apache::response::scored_response($partid,$id);
    } else {
       my $response = &Apache::response::getresponse();
       if ( $response =~ /[^\s]/) {
    my %previous = &Apache::response::check_for_previous($response,$partid,$id);
    &Apache::lonxml::debug("submitted a $response<br>\n");
    &Apache::lonxml::debug($$parstack[-1] . "\n<br>");
   
    if ( &Apache::response::submitted('scantron')) {
       &add_in_tag_answer($parstack,$safeeval);
       my ($values,$display)=&make_numerical_bubbles($partid,$id,
     $target,$parstack,$safeeval);
       $response=$values->[$response];
    }
    $Apache::lonhomework::results{"resource.$partid.$id.submission"}=$response;
    my ($ad,$msg,$name)=&check_submission($response,$partid,$id,
         $tag,$parstack,
         $safeeval);
   
    &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 ".
      $Apache::inputtags::params{'sig'});
    }
    &Apache::lonxml::debug("\n<br>result:$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);
    $Apache::lonhomework::results{"resource.$partid.$id.awarddetail"}=$ad;
    $Apache::lonhomework::results{"resource.$partid.$id.awardmsg"}=$msg;
    $Apache::lonhomework::results{"resource.$partid.$id.answername"}=$name;
    $result='';
       }
    }
       } elsif ($target eq 'web' || $target eq 'tex') {
    &check_for_answer_errors($parstack,$safeeval);
    my $award = $Apache::lonhomework::history{"resource.$Apache::inputtags::part.solved"};
    my $status = $Apache::inputtags::status['-1'];
    if ($Apache::lonhomework::type eq 'exam') {
       # FIXME support multi dimensional numerical problems
               #       in exam bubbles
       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,
       $safeeval);
       my @alphabet=('A'..'Z');
       if ($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>: '.
       $bubble_display->[$ind].'</td>';
       }
       $result.='</tr></table>';
    }
       } elsif ($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_display);
       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 \setlength{\tabcolsep}{2 mm}\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 '.$bubble_display->[$ind].'} ';
       if ($ind != $cou+$table_range[$j]-1) {$result.=' & ';}
    }
    $cou += $table_range[$j];
    $j++;
    $result.='\\\\\end{tabular}\vskip 0 mm ';
       }
       $result.='\end{enumerate}';
    } else {
       $increment = &Apache::response::repetition();
    }
       }
    }
    &Apache::response::setup_prior_tries_hash(\&format_prior_response_numerical);
       } elsif ($target eq 'edit') {
    $result.='</td></tr>'.&Apache::edit::end_table;
       } elsif ($target eq 'answer' || $target eq 'analyze') {
    my $part_id="$partid.$id";
    if ($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,$safeeval);
       if ($#incorrect eq 0) { @incorrect=(split(/,/,$incorrect[0])); }
       push (@{ $Apache::lonhomework::analyze{"$part_id.incorrect"} }, @incorrect);
       &Apache::response::check_if_computed($token,$parstack,
    $safeeval,'answer');
    }
    if (scalar(@$tagstack)) {
       &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 $number_of_bubbles = 8; #default values for number of bubbles  
  my @bubbles_values = ();    if ($target eq 'answer') {
  my @factors = (1.13,1.17,1.25,1.33,1.45); #default values of factors      $result.=&Apache::response::answer_header($tag,undef,
  my @powers = (1.0,2.0,3.0,4.0,5.0,6.0,7.0,8.0); #default values for powers        scalar(keys(%answer)));
  my $factors_number = 5; #default values for number of factors      if ($tag eq 'numericalresponse'
  my $powers_number = 8; #default values for number of powers   && $Apache::lonhomework::type eq 'exam') {
  my $symb;   my ($bubble_values,undef,$correct) = &make_numerical_bubbles($partid,
  if ($ENV{'form.symb'}=~/___\d+___/) {$symb=$ENV{'form.symb'};} else {$symb=$ENV{'request.symb'};}       $id,$target,$parstack,$safeeval);
  my $randomseed = srand(&Apache::lonnet::rndseed($symb,$ENV{'request.course.id'},   $result.=&Apache::response::answer_part($tag,$correct);
                                                               $ENV{'user.domain'},$ENV{'user.name'}));      }
  my $ind=1+int(rand()*($factors_number-1));   }
  my $factor = $factors[$ind];   foreach my $name (sort(keys(%answer))) {
  $ind=1+int(rand()*($powers_number-1));      my @answers = @{ $answer{$name}{'answers'} };
  my $power = $powers[$ind];      if ($target eq 'analyze') {
  for ($ind=0;$ind<$number_of_bubbles;$ind++) {   foreach my $info ('answer','ans_high','ans_low','format') {
     $bubbles_values[$ind] = $answers[0]*$factor**($power-$powers[$powers_number-$ind-1]);      $Apache::lonhomework::analyze{"$part_id.$info"}{$name}=[];
  }       }
  my @alphabet = ('A','B','C','D','E','F','G','H','I','J','K','L','M','N','O','P',      }
  'Q','R','S','T','U','V','W','X','Y','Z');      my ($sigline,$tolline);
         if ($target eq 'web') {      if ($name ne $tag_internal_answer_name 
   if ($$tagstack[-1] eq 'numericalresponse') {   || scalar(keys(%answer)) > 1) {
     my $id=$Apache::inputtags::response[-1];   $result.=&Apache::response::answer_part($tag,$name);
     $result.= '<table border="1"><tr>';      }
     for ($ind=0;$ind<$number_of_bubbles;$ind++) {      for(my $i=0;$i<=$#answers;$i++) {
  my $ans;   my $ans=$answers[$i];
  if ($formats[0] ne '') {   my $fmt=$formats[0];
     $ans = sprintf('%.'.$formats[0],$bubbles_values[$ind]);   if (@formats && $#formats) {$fmt=$formats[$i];}
    my ($sighigh,$siglow);
    if ($Apache::inputtags::params{'sig'}) {
       ($sighigh,$siglow)=&get_sigrange($Apache::inputtags::params{'sig'});
    }
    my @vector;
    if (ref($ans)) {
       @vector = @{ $ans };
  } else {   } else {
     my $badans = $bubbles_values[$ind];      @vector = ($ans);
     my $format = '';    }
                     #What is the number? (integer,decimal,floating point)   my @all_answer_info;
                     if ($badans=~/^(\d*\.?\d*)(E|e)(\d*)$/) {   foreach my $element (@vector) {
  $format = 'e'.$2;      my ($high,$low);
     } elsif ($badans=~/^(\d*)\.(\d*)$/) {      if ($Apache::inputtags::params{'tol'}) {
  $format = '4f';   ($high,$low)=&get_tolrange($element,$Apache::inputtags::params{'tol'});
     } elsif ($badans=~/^(\d*)$/) {      }
  $format = 'd';      if ($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] }, $fmt);
    }
       }
    }
    if ($target eq 'answer') {
       $result.= &Apache::response::answer_part($tag,join(', ',@all_answer_info));
    }
       }
   
       my @fmt_ans;
       for(my $i=0;$i<=$#answers;$i++) {
    my $ans=$answers[$i];
    my $fmt=$formats[0];
    if (@formats && $#formats) {$fmt=$formats[$i];}
    foreach my $element (@$ans) {    
       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,
     $safeeval);
    if ($fmt=~/\$/ && $unit!~/\$/) { $element=~s/\$//; }
       }
    }
    push(@fmt_ans,join(',',@$ans));
       }
       my $response=\@fmt_ans;
   
       my $hideunit=&Apache::lonnet::EXT('resource.'.$partid.'_'.
         $id.'.turnoffunit');
       if ($unit ne ''  && 
    ! ($Apache::lonhomework::type eq 'exam' ||
      lc($hideunit) eq "yes") )  {
    my $cleanunit=$unit;
    $cleanunit=~s/\$\,//g;
    foreach my $ans (@fmt_ans) {
       $ans.=" $cleanunit";
    }
       }
       my ($ad,$msg)=&check_submission($response,$partid,$id,$tag,
       $parstack,$safeeval);
       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 {
       # answer failed check if it is sig figs that is failing
       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);
    }
       }
   
       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>");
     }      }
     $ans = sprintf('%.'.$format,$bubbles_values[$ind]);   } 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') {
       $result.=&Apache::response::answer_footer($tag);
    }
       }
       if ($target eq 'grade' || $target eq 'web' || $target eq 'answer' || 
    $target eq 'tex' || $target eq 'analyze') {
           if (($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();
       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 {
       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*)\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 {
    $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;
       }
       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;
       $cell_width=$cell_width*3/4;
       return ($cell_width,$number_of_tables,@table_range);
   }
   
   sub format_number {
       my ($number,$format,$target,$safeeval)=@_;
       my $ans;
       if ($format eq '') {
    #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*)$/) {
       $format = 'd';
    }
       }
       if (!$Apache::lonxml::default_homework_loaded) {
    &Apache::lonxml::default_homework_load($safeeval);
       }
       $ans=&Apache::run::run("&prettyprint(q\0$number\0,q\0$format\0,q\0$target\0)",$safeeval);
       return $ans;
   }
   
   sub make_numerical_bubbles {
       my ($part,$id,$target,$parstack,$safeeval) =@_;
   
       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;
  }   }
     $result.='<td><input type="radio" name="HWVAL'.$id.'" value="'.$ans.'"><b>'.$alphabet[$ind].'</b>: '.$ans.'</td>';  
     }      }
     $result.='</tr></table>';  
   } elsif ($$tagstack[-1] eq 'formularesponse') {      if (defined($format) && $format ne '') {
     $result.= '<br /><br /><font color="red"> Formula have to be entered here! </font><br /><br />';   my @bubble_display;
   }   foreach my $value (@bubble_values) {
  } elsif ($target eq 'tex') {      push(@bubble_display,
  if ($$tagstack[-1] eq 'numericalresponse') {   &format_number($value,$format,$target,$safeeval));
      my $max_val = 0;   }
      if ($formats[0]=~m/^(\d+)E([^\d]*)(\d*)$/) {   return (\@bubble_values,\@bubble_display,$correct);
  $max_val=$1+$2+4;      } else {
      } else {   return (\@bubble_values,\@bubble_values,$correct);
  $max_val=4;      }
      }   }
      $max_val = int(0.9*$ENV{'form.textwidth'}/(($max_val+6)*2));   if (defined($incorrect[0]) &&
  my $celllength = 0.9*$ENV{'form.textwidth'}/$max_val-10;      scalar(@incorrect)+1 < $number_of_bubbles) {
      my @table_range = ();      &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 $number_of_tables = int($number_of_bubbles/$max_val);   }
  for (my $i=0;$i<$number_of_tables;$i++) {push @table_range,$max_val;}      }
      if ($number_of_bubbles % $max_val != 0) {      my @factors = (1.13,1.17,1.25,1.33,1.45); #default values of factors
     $number_of_tables++;      my @powers = (1..$number_of_bubbles);
     push @table_range,($number_of_bubbles % $max_val);      &Apache::response::setrandomnumber();
  }      my $ind=&Math::Random::random_uniform_integer(1,0,$#powers);
      my $j=0;      my $power = $powers[$ind];
      my $cou=0;      $ind=&Math::Random::random_uniform_integer(1,0,$#factors);
      $result.='\vskip -1 mm \noindent \begin{enumerate}\item[\textbf{'.$Apache::lonxml::counter.'}.]';      my $factor = $factors[$ind];
      for (my $i=0;$i<$number_of_tables;$i++) {      my @bubble_display;
  $result.='\vskip -1 mm \noindent \begin{tabular}{';      for ($ind=0;$ind<$number_of_bubbles;$ind++) {
  for ($ind=0;$ind<$table_range[$j];$ind++) {   $bubble_values[$ind] = $answer*($factor**($power-$powers[$#powers-$ind]));
      $result.='lp{'.$celllength.' mm}';   $bubble_display[$ind] = &format_number($bubble_values[$ind],
  }         $format,$target,$safeeval);
  $result.='}';  
  for ($ind=$cou;$ind<$cou+$table_range[$j];$ind++) {      }
      my $ans;      my $correct = $alphabet[$number_of_bubbles-$power];
      if ($formats[0] ne '') {      &Math::Random::random_set_seed(@oldseed);
  $ans = sprintf('%.'.$formats[0],$bubbles_values[$ind]);      return (\@bubble_values,\@bubble_display,$correct);
  if ($ans =~ m/([0-9\.\-\+]+)E([0-9\-\+]+)/ ) {  
      my $number = $1;  
      my $power = $2;  
      $power=~s/^\+//;  
      $power=~s/^(-?)0+(\d+)//;  
      $ans=$number.'$\times 10^{'.$1.$2.'}$'; #'stupidemacs  
  }   
      } else {  
  my $badans = $bubbles_values[$ind];  
  my $format = '';   
  #What is the number? (integer,decimal,floating point)  
  if ($badans=~/^(\d*\.?\d*)(E|e)(\d*)$/) {  
      $format = 'e'.$2;  
  } elsif ($badans=~/^(\d*)\.(\d*)$/) {  
      $format = '4f';  
  } elsif ($badans=~/^(\d*)$/) {  
      $format = 'd';  
  }  
  $ans = sprintf('%.'.$format,$bubbles_values[$ind]);  
  if ($ans =~ m/([0-9\.\-\+]+)E([0-9\-\+]+)/ ) {  
      my $number = $1;  
      my $power = $2;  
      $power=~s/^\+//;  
      $power=~s/^(-?)0+(\d+)//;  
      $ans=$number.'$\times 10^{'.$1.$2.'}$'; #'stupidemacs  
  }   
      }  
      $result.='\hskip -3 mm {\small \textbf{'.$alphabet[$ind].'}}$\bigcirc$\hskip -2 mm & {\small '.$ans.'} ';  
      if ($ind != $cou+$table_range[$j]-1) {$result.=' & ';}  
  }  
  $cou += $table_range[$j];  
  $j++;  
  $result.='\\\\\end{tabular}\vskip 0 mm ';      
      }  
      $result.='\end{enumerate}';  
      &Apache::lonxml::increment_counter();  
          } else {  
      $result.='\fbox{\fbox{\parbox{\textwidth-5mm}{\strut\\\\\strut\\\\\strut\\\\\strut\\\\\strut\\\\\strut\\\\}}}';  
      $result.= '\begin{enumerate}\item[\textbf{'.$Apache::lonxml::counter.'}.]\textit{Live blank on scoring form}\vskip 0 mm \end{enumerate}';  
      &Apache::lonxml::increment_counter();  
  }  
  }  
     }  
   } 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"} = $$tagstack[-1];  
       }  
       &Apache::response::setup_params($$tagstack[-1]);  
       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($$tagstack[-1]);  
       }  
       for(my $i=0;$i<=$#answers;$i++) {  
   my $ans=$answers[$i];  
   my $fmt;  
   if (@formats) {  
       if ($#formats) {  
   $fmt=$formats[$i];  
       } else {  
   $fmt=$formats[0];  
       }  
   }  
   my ($high,$low);  
   if ($Apache::inputtags::params{'tol'}) {  
       ($high,$low)=&get_tolrange($ans,$Apache::inputtags::params{'tol'});  
   }  
   my ($sighigh,$siglow);  
   if ($Apache::inputtags::params{'sig'}) {  
       ($sighigh,$siglow)=&get_sigrange($Apache::inputtags::params{'sig'});  
   }  
   if ($fmt) {  
       $ans = sprintf('%.'.$fmt,$ans);  
       if ($high) {  
   $high = sprintf('%.'.$fmt,$high); $low = sprintf('%.'.$fmt,$low);  
       }  
   }  
   if ($target eq 'answer') {  
       if ($high) { $ans.=' ['.$low.','.$high.']'; }  
       if ($sighigh) { $ans.= " Sig <i>$siglow - $sighigh</i>"; }  
       $result.=&Apache::response::answer_part($$tagstack[-1],$ans);  
   } elsif ($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"} }, $low);  
       }  
   }  
       }  
       if ($unit) {  
   if ($target eq 'answer') {  
       $result.=&Apache::response::answer_part($$tagstack[-1],  
       "Unit: <b>$unit</b>");  
   } elsif ($target eq 'analyze') {  
       push (@{ $Apache::lonhomework::analyze{"$part_id.unit"} },  
     $unit);  
   }  
       }  
       if ($type || $token->[1] eq 'stringresponse') {  
   my $string='Case Insensitive';  
   if ($type eq 'mc') {  
       $string='Multiple Choice';  
   } elsif ($type eq 'cs') {  
       $string='Case Sensitive';  
   } elsif ($type eq 'ci') {  
       $string='Case Insensitive';  
   } elsif ($type eq 'fml') {  
       $string='Formula';  
   }  
   if ($target eq 'answer') {  
       $result.=&Apache::response::answer_part($$tagstack[-1],  
       '<b>'.$string.'</b>');  
   } elsif ($target eq 'analyze') {  
       push (@{ $Apache::lonhomework::analyze{"$part_id.type"} },  
     $type);  
   }  
       }  
       if ($$tagstack[-1] eq 'formularesponse' && $target eq 'answer') {  
   my $samples=&Apache::lonxml::get_param('samples',$parstack,$safeeval);  
   $result.=&Apache::response::answer_part($$tagstack[-1],$samples);  
       }  
       if ($target eq 'answer') {  
   $result.=&Apache::response::answer_footer($$tagstack[-1]);  
       }  
   }  
   &Apache::response::end_response;  
   return $result;  
 }  }
   
 sub get_tolrange {  sub get_tolrange {
   my ($ans,$tol)=@_;      my ($ans,$tol)=@_;
   my ($high,$low);      my ($high,$low);
   if ($tol =~ /%$/) {      if ($tol =~ /%$/) {
     chop($tol);   chop($tol);
     my $change=$ans*($tol/100.0);   my $change=$ans*($tol/100.0);
     $high=$ans+$change;   $high=$ans+$change;
     $low=$ans-$change;   $low=$ans-$change;
   } else {      } else {
     $high=$ans+$tol;   $high=$ans+$tol;
     $low=$ans-$tol;   $low=$ans-$tol;
   }      }
   return ($high,$low);      return ($high,$low);
 }  }
   
 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 $sig_lbound;      my $courseid=$env{'request.course.id'};
   my $sig_ubound;      if ($env{'request.state'} ne 'construct'
   if ($sig eq '') {   && lc($env{"course.$courseid.disablesigfigs"}) eq 'yes') {
     $sig_lbound = 0; #SIG_LB_DEFAULT   return (15,0);
     $sig_ubound =15; #SIG_UB_DEFAULT      }
   } else {      my $sig_lbound;
     ($sig_lbound,$sig_ubound) = split(/,/,$sig);      my $sig_ubound;
     if (!$sig_lbound) {      if ($sig eq '') {
       $sig_lbound = 0; #SIG_LB_DEFAULT   $sig_lbound = 0; #SIG_LB_DEFAULT
       $sig_ubound =15; #SIG_UB_DEFAULT   $sig_ubound =15; #SIG_UB_DEFAULT
     }      } else {
     if (!$sig_ubound) { $sig_ubound=$sig_lbound; }   ($sig_lbound,$sig_ubound) = split(/,/,$sig);
   }   if (!defined($sig_lbound)) {
   return ($sig_ubound,$sig_lbound);      $sig_lbound = 0; #SIG_LB_DEFAULT
       $sig_ubound =15; #SIG_UB_DEFAULT
    }
    if (!defined($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);
   }
   
   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 $result;
   if ($target eq 'meta') {      my $id = &Apache::response::start_response($parstack,$safeeval);
     $result=&Apache::response::meta_package_write('stringresponse');      if ($target eq 'meta') {
   } else {   $result=&Apache::response::meta_package_write('stringresponse');
     $result.=&start_numericalresponse(@_);      } elsif ($target eq 'edit') {
   }   $result.=&Apache::edit::tag_start($target,$token);
   return $result;   $result.=&Apache::edit::text_arg('Answer:','answer',$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;
 }  }
   
 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 {
   my ($target,$token,$tagstack,$parstack,$parser,$safeeval,$style)=@_;      my ($target,$token,$tagstack,$parstack,$parser,$safeeval,$style)=@_;
   my $result;      my $result;
   if ($target eq 'meta') {      if ($target eq 'meta') {
     $result=&Apache::response::meta_package_write('formularesponse');   &Apache::response::start_response($parstack,$safeeval);
   } else {   $result=&Apache::response::meta_package_write('formularesponse');
     $result.=&start_numericalresponse(@_);   &Apache::response::end_response();
   }      } else {
   return $result;   $result.=&start_numericalresponse(@_);
       }
       return $result;
 }  }
   
 sub end_formularesponse {  sub end_formularesponse {
   return end_numericalresponse(@_);      return end_numericalresponse(@_);
 }  }
   
 1;  1;
 __END__  __END__
    
Removed from v.1.77  
changed lines
  Added in v.1.221

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