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version 1.14, 2000/12/11 23:47:36 version 1.303, 2012/06/08 12:25:54
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 # The LearningOnline Network with CAPA  # The LearningOnline Network with CAPA
 # input  definitons  # input  definitons
   #
   # $Id$
   #
   # Copyright Michigan State University Board of Trustees
   #
   # This file is part of the LearningOnline Network with CAPA (LON-CAPA).
   #
   # LON-CAPA is free software; you can redistribute it and/or modify
   # it under the terms of the GNU General Public License as published by
   # the Free Software Foundation; either version 2 of the License, or
   # (at your option) any later version.
   #
   # LON-CAPA is distributed in the hope that it will be useful,
   # but WITHOUT ANY WARRANTY; without even the implied warranty of
   # MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
   # GNU General Public License for more details.
   #
   # You should have received a copy of the GNU General Public License
   # along with LON-CAPA; if not, write to the Free Software
   # Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA  02111-1307  USA
   #
   # /home/httpd/html/adm/gpl.txt
   #
   # http://www.lon-capa.org/
   
   =pod
   
   =head1 NAME
   
   Apache::inputtags
   
   =head1 SYNOPSIS
   
   
   
   This is part of the LearningOnline Network with CAPA project
   described at http://www.lon-capa.org.
   
   
   =head1 NOTABLE SUBROUTINES
   
   =over
   
   =item 
   
   =back
   
   =cut
   
 package Apache::inputtags;  package Apache::inputtags;
   use HTML::Entities();
 use strict;  use strict;
   use Apache::loncommon;
   use Apache::lonhtmlcommon;
   use Apache::lonlocal;
   use Apache::lonnet;
   use LONCAPA;
    
   
 sub BEGIN {  BEGIN {
   &Apache::lonxml::register('Apache::inputtags',('textarea','textline','datasubmission'));      &Apache::lonxml::register('Apache::inputtags',('hiddensubmission','hiddenline','textfield','textline'));
 }  }
   
   =pod
   
   =item initialize_inputtags()
   
   Initializes a set of global variables used during the parse of the problem.
   
   @Apache::inputtags::input        - List of current input ids.
   @Apache::inputtags::inputlist    - List of all input ids seen this problem.
   @Apache::inputtags::response     - List of all current resopnse ids.
   @Apache::inputtags::responselist - List of all response ids seen this 
                                        problem.
   @Apache::inputtags::hint         - List of all hint ids.
   @Apache::inputtags::hintlist     - List of all hint ids seen this problem.
   @Apache::inputtags::previous     - List describing if specific responseds
                                        have been used
   @Apache::inputtags::previous_version - Submission responses were used in.
   $Apache::inputtags::part         - Current part id (valid only in 
                                        <problem>)
                                      0 if not in a part.
   @Apache::inputtags::partlist     - List of part ids seen in the current
                                        <problem>
   @Apache::inputtags::status       - List of problem  statuses. First 
                                      element is the status of the <problem>
                                      the remainder are for individual <part>s.
   %Apache::inputtags::params       - Hash of defined parameters for the
                                      current response.
   @Apache::inputtags::import       - List of all ids for <import> thes get
                                      join()ed and prepended.
   @Apache::inputtags::importlist   - List of all import ids seen.
   $Apache::inputtags::response_with_no_part
                                    - Flag set true if we have seen a response
                                      that is not inside a <part>
   %Apache::inputtags::answertxt    - <*response> tags store correct
                                      answer strings for display by <textline/>
                                      in this hash.
   %Apache::inputtags::submission_display
                                    - <*response> tags store improved display
                                      of submission strings for display by part
                                      end.
   
   =cut
   
 sub initialize_inputtags {  sub initialize_inputtags {
   @Apache::inputtags::input=();      @Apache::inputtags::input=();
   @Apache::inputtags::inputlist=();      @Apache::inputtags::inputlist=();
   @Apache::inputtags::response=();      @Apache::inputtags::response=();
   @Apache::inputtags::responselist=();      @Apache::inputtags::responselist=();
   @Apache::inputtags::answergroup=();      @Apache::inputtags::hint=();
   $Apache::inputtags::part='';      @Apache::inputtags::hintlist=();
   %Apache::inputtags::params=();      @Apache::inputtags::previous=();
       @Apache::inputtags::previous_version=();
       $Apache::inputtags::part='';
       @Apache::inputtags::partlist=();
       @Apache::inputtags::status=();
       %Apache::inputtags::params=();
       @Apache::inputtags::import=();
       @Apache::inputtags::importlist=();
       $Apache::inputtags::response_with_no_part=0;
       %Apache::inputtags::answertxt=();
       %Apache::inputtags::submission_display=();
   }
   
   sub check_for_duplicate_ids {
       my %check;
       foreach my $id (@Apache::inputtags::partlist,
       @Apache::inputtags::responselist,
       @Apache::inputtags::hintlist,
       @Apache::inputtags::importlist) {
    $check{$id}++;
       }
       my @duplicates;
       foreach my $id (sort(keys(%check))) {
    if ($check{$id} > 1) {
       push(@duplicates,$id);
    }
       }
       if (@duplicates) {
    &Apache::lonxml::error("Duplicated ids found, problem will operate incorrectly. Duplicated ids seen: ",join(', ',@duplicates));
       }
 }  }
   
 sub start_input {  sub start_input {
   my ($parstack,$safeeval)=@_;      my ($parstack,$safeeval)=@_;
   my $args ='';      my $id = &Apache::lonxml::get_id($parstack,$safeeval);
   if ( $#$parstack > -1 ) { $args=$$parstack[$#$parstack]; }      push (@Apache::inputtags::input,$id);
   my $id = &Apache::run::run("{$args;".'return $id}',$safeeval);      push (@Apache::inputtags::inputlist,$id);
   push (@Apache::inputtags::input,$id);      return $id;
   push (@Apache::inputtags::inputlist,$id);  
   return $id;  
 }  }
   
 sub end_input {  sub end_input {
   pop @Apache::inputtags::input;      pop @Apache::inputtags::input;
   return '';      return '';
   }
   
   sub addchars {
       my ($fieldid,$addchars)=@_;
       my $output='';
       foreach (split(/\,/,$addchars)) {
    $output.='<a href="javascript:void(document.forms.lonhomework.'.
       $fieldid.'.value+=\''.$_.'\')">'.$_.'</a> ';
       }
       return $output;
   }
   
   sub start_textfield {
       my ($target,$token,$tagstack,$parstack,$parser,$safeeval,$style)=@_;
       my $result = "";
       my $id = &start_input($parstack,$safeeval);
       my $resid=$Apache::inputtags::response[-1];
       if ($target eq 'web') {
    $Apache::lonxml::evaluate--;
    my $partid=$Apache::inputtags::part;
           my ($oldresponse,$newvariation);
           if ((($Apache::lonhomework::history{"resource.$partid.type"} eq 'randomizetry') ||
                ($Apache::lonhomework::type eq 'randomizetry')) &&
                ($Apache::inputtags::status[-1] eq 'CAN_ANSWER')) {
               if ($env{'form.'.$partid.'.rndseed'} ne
                   $Apache::lonhomework::history{"resource.$partid.rndseed"}) {
                   $newvariation = 1;
               }
           }
           unless ($newvariation) {
       $oldresponse = $Apache::lonhomework::history{"resource.$partid.$resid.submission"};
           }
    if ($Apache::inputtags::status[-1] eq 'CAN_ANSWER') {
       my $cols = &Apache::lonxml::get_param('cols',$parstack,$safeeval);
       if ( $cols eq '') { $cols = 80; }
       my $rows = &Apache::lonxml::get_param('rows',$parstack,$safeeval);
       if ( $rows eq '') { $rows = 16; }
       my $addchars=&Apache::lonxml::get_param('addchars',$parstack,$safeeval);
       $result='';
       if ($addchars) {
    $result.=&addchars('HWVAL_'.$resid,$addchars);
       }
               my $textareaclass = 'class="LC_richDetectHtml"';
       $result.= '<textarea wrap="hard" name="HWVAL_'.$resid.'" id="HWVAL_'.$resid.'" '.
         'rows="'.$rows.'" cols="'.$cols.'" '.$textareaclass.'>'.
                         &HTML::Entities::encode($oldresponse,'<>&"');
       if ($oldresponse ne '') {
   
    #get rid of any startup text if the user has already responded
    &Apache::lonxml::get_all_text("/textfield",$parser,$style);
       }
    } else {
       #show past answer in the essayresponse case
       if ($oldresponse =~ /\S/
    && &Apache::londefdef::is_inside_of($tagstack,
       'essayresponse') ) {
    $result='<table class="LC_pastsubmission"><tr><td>'.
       $oldresponse.'</td></tr></table>';
       }
       #get rid of any startup text
       &Apache::lonxml::get_all_text("/textfield",$parser,$style);
    }
       } elsif ($target eq 'grade') {
    my $seedtext=&Apache::lonxml::get_all_text("/textfield",$parser,
      $style);
    if ($seedtext eq $env{'form.HWVAL_'.$resid}) {
       # if the seed text is still there it wasn't a real submission
       $env{'form.HWVAL_'.$resid}='';
    }
       } elsif ($target eq 'edit') {
    $result.=&Apache::edit::tag_start($target,$token);
    $result.=&Apache::edit::text_arg('Rows:','rows',$token,4);
    $result.=&Apache::edit::text_arg('Columns:','cols',$token,4);
    $result.=&Apache::edit::text_arg
       ('Click-On Texts (comma sep):','addchars',$token,10);
    my $bodytext=&Apache::lonxml::get_all_text("/textfield",$parser,
      $style);
    $result.=&Apache::edit::editfield($token->[1],$bodytext,'Text you want to appear by default:',80,2);
       } elsif ($target eq 'modified') {
    my $constructtag=&Apache::edit::get_new_args($token,$parstack,
        $safeeval,'rows','cols',
        'addchars');
    if ($constructtag) {
       $result = &Apache::edit::rebuild_tag($token);
    } else {
       $result=$token->[4];
    }
    $result.=&Apache::edit::modifiedfield("/textfield",$parser);
       } elsif ($target eq 'tex') {
    my $number_of_lines = &Apache::lonxml::get_param('rows',$parstack,$safeeval);
    my $width_of_box = &Apache::lonxml::get_param('cols',$parstack,$safeeval);
    if ($$tagstack[-2] eq 'essayresponse' and $Apache::lonhomework::type eq 'exam') {
       $result = '\fbox{\fbox{\parbox{\textwidth-5mm}{';
       for (my $i=0;$i<int $number_of_lines*2;$i++) {$result.='\strut \\\\ ';}
       $result.='\strut \\\\\strut \\\\\strut \\\\\strut \\\\}}}';
    } else {
       my $TeXwidth=$width_of_box/80;
       $result = '\vskip 1 mm \fbox{\fbox{\parbox{'.$TeXwidth.'\textwidth-5mm}{';
       for (my $i=0;$i<int $number_of_lines*2;$i++) {$result.='\strut \\\\ ';}
       $result.='}}}\vskip 2 mm ';
    }
       }
       return $result;
   }
   
   sub end_textfield {
       my ($target,$token,$tagstack,$parstack,$parser,$safeeval)=@_;
       my $result;
       if ($target eq 'web') {
    $Apache::lonxml::evaluate++;
    if ($Apache::inputtags::status[-1] eq 'CAN_ANSWER') {
       return "</textarea>";
    }
       } elsif ($target eq 'edit') {
    $result=&Apache::edit::end_table();
       }
       &end_input;
       return $result;
   }
   
   sub exam_score_line {
       my ($target) = @_;
   
       my $result;
       if ($target eq 'tex') {
    my $repetition = &Apache::response::repetition();
    $result.='\begin{enumerate}';
    if ($env{'request.state'} eq "construct" ) {$result.='\item[\strut]';}
    foreach my $i (0..$repetition-1) {
       $result.='\item[\textbf{'.
    ($Apache::lonxml::counter+$i).
    '}.]\textit{Leave blank on scoring form}\vskip 0 mm';
    }
    $result.= '\end{enumerate}';
       }
   
       return $result;
   }
   
   sub exam_box {
       my ($target) = @_;
       my $result;
   
       if ($target eq 'tex') {
    $result .= '\fbox{\fbox{\parbox{\textwidth-5mm}{\strut\\\\\strut\\\\\strut\\\\\strut\\\\}}}';
    $result .= &exam_score_line($target);
       } elsif ($target eq 'web') {
    my $id=$Apache::inputtags::response[-1];
    $result.= '<br /><br />
                      <textarea name="HWVAL_'.$id.'" rows="4" cols="50">
                      </textarea> <br /><br />';
       }
       return $result;
 }  }
   
 sub start_textarea {  sub needs_exam_box {
   my ($target,$token,$parstack,$parser,$safeeval)=@_;      my ($tagstack) = @_;
   my $result = "";      my @tags = ('formularesponse',
   my $id = &start_input($parstack,$safeeval);   'stringresponse',
   if ($target eq 'web') {   'reactionresponse',
     $result= '<textarea name="HWVAL'.$id.'" value="">';   'organicresponse',
   }   );
   return $result;  
 }      foreach my $tag (@tags) {
    if (grep(/\Q$tag\E/,@$tagstack)) {
 sub end_textarea {      return 1;
   my ($target,$token,$parstack,$parser,$safeeval)=@_;   }
   if ($target eq 'web') {      }
     return "</textarea>";      return 0;
   }   
   &end_input;  
   return '';  
 }  }
   
 sub start_textline {  sub start_textline {
   my ($target,$token,$parstack,$parser,$safeeval)=@_;      my ($target,$token,$tagstack,$parstack,$parser,$safeeval)=@_;
   my $result = "";      my $result = "";
   if ($target eq 'web') {      my $input_id = &start_input($parstack,$safeeval);
     my $args ='';      if ($target eq 'web') {
     if ( $#$parstack > -1 ) { $args=$$parstack[$#$parstack]; }   $Apache::lonxml::evaluate--;
     my $size = &Apache::run::run("{$args;".'return $size}',$safeeval);   my $partid=$Apache::inputtags::part;
     if ($size eq '') { $size=20; }   my $id=$Apache::inputtags::response[-1];
     my $oldresponse = $Apache::lonhomework::history{"resource.submission.$Apache::inputtags::part.$Apache::inputtags::response['-1']"};   if (!&Apache::response::show_answer()) {
     $result= '<input type="text" name="HWVAL'.$Apache::inputtags::response['-1'].'" value="'.$oldresponse.'" size="'.$size.'">';      my $size = &Apache::lonxml::get_param('size',$parstack,$safeeval);
   }      my $maxlength;
   return $result;      if ($size eq '') { $size=20; } else {
    if ($size < 20) {
       $maxlength = ' maxlength="'.$size.'"';
    }
       }
               my ($oldresponse,$newvariation);
               if ((($Apache::lonhomework::history{"resource.$partid.type"} eq 'randomizetry') ||
                    ($Apache::lonhomework::type eq 'randomizetry')) &&
                    ($Apache::inputtags::status[-1] eq 'CAN_ANSWER')) {
                   if ($env{'form.'.$partid.'.rndseed'} ne
                       $Apache::lonhomework::history{"resource.$partid.rndseed"}) {
                       $newvariation = 1;
                   }
               }
               unless ($newvariation) {
           $oldresponse = $Apache::lonhomework::history{"resource.$partid.$id.submission"};
           &Apache::lonxml::debug("oldresponse $oldresponse is ".ref($oldresponse));
           if (ref($oldresponse) eq 'ARRAY') {
       $oldresponse = $oldresponse->[$#Apache::inputtags::inputlist];
           }
           $oldresponse = &HTML::Entities::encode($oldresponse,'<>&"');
                   $oldresponse =~ s/^\s+//;
                   $oldresponse =~ s/\s+$//;
                   $oldresponse =~ s/\s+/ /g;
               }
       if ($Apache::lonhomework::type ne 'exam') {
    my $addchars=&Apache::lonxml::get_param('addchars',$parstack,$safeeval);
    $result='';
    if ($addchars) {
       $result.=&addchars('HWVAL_'.$id,$addchars);
    }
    my $readonly=&Apache::lonxml::get_param('readonly',$parstack,
    $safeeval);
    if (lc($readonly) eq 'yes' 
       || $Apache::inputtags::status[-1] eq 'CANNOT_ANSWER') {
       $readonly=' readonly="readonly" ';
    } else {
       $readonly='';
    }
    my $name = 'HWVAL_'.$id;
    if ($Apache::inputtags::status[-1] eq 'CANNOT_ANSWER') {
       $name = "none";
    }
    $result.= '<input onkeydown="javascript:setSubmittedPart(\''.$partid.'\');" type="text" '.$readonly.' name="'.$name.'" value="'.
       $oldresponse.'" size="'.$size.'"'.$maxlength.' />';
       }
       if ($Apache::lonhomework::type eq 'exam'
    && &needs_exam_box($tagstack)) {
    $result.=&exam_box($target);
       }
    } else {
       #right or wrong don't show what was last typed in.
       my $count = scalar(@Apache::inputtags::inputlist)-1;
       $result='<b>'.$Apache::inputtags::answertxt{$id}[$count].'</b>';
       #$result='';
    }
       } elsif ($target eq 'edit') {
    $result=&Apache::edit::tag_start($target,$token);
    $result.=&Apache::edit::text_arg('Size:','size',$token,'5').
       &Apache::edit::text_arg('Click-On Texts (comma sep):',
       'addchars',$token,10);
           $result.=&Apache::edit::select_arg('Readonly:','readonly',
      ['no','yes'],$token);
    $result.=&Apache::edit::end_row();
    $result.=&Apache::edit::end_table();
       } elsif ($target eq 'modified') {
    my $constructtag=&Apache::edit::get_new_args($token,$parstack,
        $safeeval,'size',
        'addchars','readonly');
    if ($constructtag) { $result = &Apache::edit::rebuild_tag($token); }
       } elsif ($target eq 'tex' 
        && $Apache::lonhomework::type ne 'exam') {
    my $size = &Apache::lonxml::get_param('size',$parstack,$safeeval);
    if ($size != 0) {$size=$size*2; $size.=' mm';} else {$size='40 mm';}
    if ($env{'form.pdfFormFields'} eq 'yes'
               && $Apache::inputtags::status[-1] eq 'CAN_ANSWER') {
               my $fieldname = $env{'request.symb'}.
                                    '&part_'. $Apache::inputtags::part.
                                    '&textresponse'.
                                    '&HWVAL_' . $Apache::inputtags::response['-1'];
               $result='\textField{'.$fieldname.'}{'.$size.'}{12 bp}';
           } else {
               $result='\framebox['.$size.'][s]{\tiny\strut}';
           }
       } elsif ($target eq 'tex' 
        && $Apache::lonhomework::type eq 'exam'
        && &needs_exam_box($tagstack)) {
    $result.=&exam_box($target);
       }
       return $result;
 }  }
   
 sub end_textline {  sub end_textline {
   my ($target,$token,$parstack,$parser,$safeeval)=@_;      my ($target,$token,$tagstack,$parstack,$parser,$safeeval)=@_;
   return "";      if    ($target eq 'web') { $Apache::lonxml::evaluate++; }
       elsif ($target eq 'edit') { return ('','no'); }
       &end_input();
       return "";
 }  }
   
 #answergroup is deprecated  sub start_hiddenline {
 #sub start_answergroup {      my ($target,$token,$tagstack,$parstack,$parser,$safeeval)=@_;
 #  my ($target,$token,$parstack,$parser,$safeeval)=@_;      my $result = "";
 #  my $args ='';      my $input_id = &start_input($parstack,$safeeval);
 #  if ( $#$parstack > -1 ) { $args=$$parstack[$#$parstack]; }      if ($target eq 'web') {
 #  my $id = &Apache::run::run("{$args;".'return $id}',$safeeval);   $Apache::lonxml::evaluate--;
 #  push (@Apache::inputtags::answergroup,$id);   if ($Apache::inputtags::status[-1] eq 'CAN_ANSWER') {
 #  if ($target == 'web') {      my $partid=$Apache::inputtags::part;
 #          my $id=$Apache::inputtags::response[-1];
 #  }      my $oldresponse = $Apache::lonhomework::history{"resource.$partid.$id.submission"};
 #  return '';      if (ref($oldresponse) eq 'ARRAY') {
 #}   $oldresponse = $oldresponse->[$#Apache::inputtags::inputlist];
 #      }
 #sub end_answergroup {      $oldresponse = &HTML::Entities::encode($oldresponse,'<>&"');
 #  my ($target,$token,$parstack,$parser,$safeeval)=@_;  
 #  return ''; # <answergroup> has ben deprecated      if ($Apache::lonhomework::type ne 'exam') {
 #  my $args ='';   $result= '<input type="hidden" name="HWVAL_'.$id.'" value="'.
 #  if ( $#$parstack > -1 ) { $args=$$parstack[$#$parstack]; }      $oldresponse.'" />';
 #  my $id = &Apache::run::run("{$args;".'return $id}',$safeeval);      }
 #  push (@Apache::inputtags::answergroup,$id);   }
 #  my $result='';      } elsif ($target eq 'edit') {
 #  my $button='<input type="submit" name="submit" value="Submit All Answers">';   $result=&Apache::edit::tag_start($target,$token);
 #  my $showbutton='1';   $result.=&Apache::edit::end_table;
 #  my $usedtry='1';      }
 #  my $response='';  
 #  if ( $target == 'web' ) {      if ( ($target eq 'web' || $target eq 'tex')
 #    if ( defined $ENV{'form.submit'}) {   && $Apache::lonhomework::type eq 'exam'
 #    }   && &needs_exam_box($tagstack)) {
 #    if ($showbutton > 0) { $result.=$button }   $result.=&exam_box($target);
 #  }      }
 #  pop @Apache::inputtags::answergroup;      return $result;
 #  return $result;  }
 #}  
   sub end_hiddenline {
       my ($target,$token,$tagstack,$parstack,$parser,$safeeval)=@_;
 sub start_datasubmission {      if    ($target eq 'web') { $Apache::lonxml::evaluate++; }
 }      elsif ($target eq 'edit') { return ('','no'); }
       &end_input();
 sub end_datasubmission {      return "";
   my ($target,$token,$parstack,$parser,$safeeval)=@_;  }
   if ( $target == 'web' ) {  
     return '<input type="submit" name="submit" value="Submit All Data">';  
   }  sub start_hiddensubmission {
   return '';      my ($target,$token,$tagstack,$parstack,$parser,$safeeval)=@_;
       my $result = "";
       my $input_id = &start_input($parstack,$safeeval);
       if ($target eq 'web') {
           $Apache::lonxml::evaluate--;
           if ($Apache::inputtags::status[-1] eq 'CAN_ANSWER') {
               my $partid=$Apache::inputtags::part;
               my $id=$Apache::inputtags::response[-1];
               if ($Apache::lonhomework::type ne 'exam') {
                   my $value = &Apache::lonxml::get_param('value',$parstack,$safeeval);
                   $value = &HTML::Entities::encode($value,'<>&"');
                   $result= '<input type="hidden" name="HWVAL_'.$id.'" value="'.$value.'" />';
               }
           }
       } elsif ($target eq 'edit') {
           $result=&Apache::edit::tag_start($target,$token);
           $result.=&Apache::edit::text_arg('Value:','value',$token,'15');
           $result.=&Apache::edit::end_row();
           $result.=&Apache::edit::end_table();
       } elsif ($target eq 'modified') {
           my $constructtag=&Apache::edit::get_new_args($token,$parstack,
                                                        $safeeval,'value');
           if ($constructtag) { $result = &Apache::edit::rebuild_tag($token); }
       }
   
       if ( ($target eq 'web' || $target eq 'tex')
            && $Apache::lonhomework::type eq 'exam'
            && &needs_exam_box($tagstack)) {
           $result.=&exam_box($target);
       }
       return $result;
   }
   
   sub end_hiddensubmission {
       my ($target,$token,$tagstack,$parstack,$parser,$safeeval)=@_;
       if    ($target eq 'web') { $Apache::lonxml::evaluate++; }
       elsif ($target eq 'edit') { return ('','no'); }
       &end_input();
       return "";
   }
   
   =pod
   
   =item file_selector()
   
   $part -> partid
   $id -> responseid
   $uploadefiletypes -> comma seperated list of extensions allowed or * for any
   $which -> 'uploadonly'  -> only newly uploaded files
             'portfolioonly' -> only allow files from portfolio
             'both' -> allow files from either location
   $extratext -> additional text to go between the link and the input box
   $maxfilesize -> maximum cumulative filesize for submitted files (in MB).
   returns a table row <tr> 
   
   =cut
   
   sub file_selector {
       my ($part,$id,$uploadedfiletypes,$which,$extratext,$maxfilesize)=@_;
       if (!$uploadedfiletypes) { return ''; }
   
       my $jspart=$part;
       $jspart=~s/\./_/g;
   
       my $result;
       my $current_files_display = &current_file_submissions($part,$id);
       my $addfiles;
       if ($current_files_display) {
           $result .= &Apache::lonhtmlcommon::row_title(&mt('Currently submitted files')).
                      $current_files_display.
                      &Apache::lonhtmlcommon::row_closure();
           $addfiles = &mt('Submit other file(s)');
       } else {
           $addfiles = &mt('Choose file(s) to submit');
       }
       $result .= &Apache::lonhtmlcommon::row_title($addfiles);
       my $constraints;
       if ($uploadedfiletypes ne '*') {
    $constraints =
       &mt('Allowed filetypes: [_1]','<b>'.$uploadedfiletypes.'</b>').'<br />';
       }
       if ($maxfilesize) {
           $constraints .= &mt('Combined size of all files not to exceed: [_1] MB[_2].',
                           '<b>'.$maxfilesize.'</b>').'<br />';
       }
       if ($constraints) {
           $result .= $constraints.'<br />';
       }
       if ($which eq 'uploadonly' || $which eq 'both') { 
    $result.=&mt('Submit a file: (only one file per submission)').
       ' <br /><input type="file" size="50" name="HWFILE'.
       $jspart.'_'.$id.'" id="HWFILE'.$jspart.'_'.$id.'" /><br />';
       }
       if ( $which eq 'both') {
    $result.='<br />'.'<strong>'.&mt('OR:').'</strong><br />';
       }
       if ($which eq 'portfolioonly' || $which eq 'both') {
           my $symb = $env{'request.symb'};
           (undef,undef,my $res)=&Apache::lonnet::decode_symb($symb);
           my $showsymb;
           # If resource is a .task and URL is unencrypted, include symb in query string
           # for url opened in portfolio file selection window. Can be used to override
           # blocking of portfolio access resulting from an exam event in a different course. 
           if ($res =~ /\.task$/i) {
               my $encsymb = &Apache::lonenc::check_encrypt($symb);
               if ($symb eq $encsymb) {
                   $showsymb = $symb;
               }
           }
    $result.=$extratext.'<a href='."'".'javascript:void(window.open("/adm/portfolio?mode=selectfile&amp;fieldname='.$env{'form.request.prefix'}.'HWPORT'.$jspart.'_'.$id.'&symb='.$showsymb.'","cat","height=600,width=800,scrollbars=1,resizable=1,menubar=2,location=1"))'."'".'>'.
       &mt('Select Portfolio Files: (one or more files per submission)').'</a><br />'.
       '<input type="text" size="50" name="HWPORT'.$jspart.'_'.$id.'" value="" />'.
       '<br />';
   
       }
       $result.=&Apache::lonhtmlcommon::row_closure(1);
       return $result;
   }
   
   sub current_file_submissions {
       my ($part,$id) = @_;
       my $jspart=$part;
       $jspart=~s/\./_/g;
       my $uploadedfile=$Apache::lonhomework::history{"resource.$part.$id.uploadedfile"};
       my $portfiles=$Apache::lonhomework::history{"resource.$part.$id.portfiles"};
       return if (($uploadedfile eq '') && ($portfiles !~/[^\s]/));
       my $header = &Apache::loncommon::start_data_table().
                    &Apache::loncommon::start_data_table_header_row();
       if ($Apache::inputtags::status[-1] eq 'CAN_ANSWER') {
           $header .= '<th>'.&mt('Delete?').'</th>';
       }
       $header .=   '<th>'.&mt('File').'</th>'.
                    '<th>'.&mt('Size (MB)').'</th>'.
                    '<th>'.&mt('Last Modified').'</th>'.
                    &Apache::loncommon::end_data_table_header_row();
       my (undef,$crsid,$udom,$uname)=&Apache::lonnet::whichuser();
       my ($cdom,$cnum) = ($crsid =~ /^($LONCAPA::match_domain)_($LONCAPA::match_courseid)$/);
       my ($result,$header_shown,%okfiles,%rows,%legacy,@bad_file_list);
       if ($uploadedfile) {
           my $url=$Apache::lonhomework::history{"resource.$part.$id.uploadedurl"};
           my $link = &HTML::Entities::encode($url,'<>&"');
           my ($path,$name) = ($url =~ m{^(/uploaded/\Q$udom\E/\Q$uname\E/essayresponse.*/)([^/]+)$});
           my ($status,$hashref,$error) =
               &current_file_info($url,$link,$name,$path);
           if ($status eq 'ok') {
               push(@{$okfiles{$name}},$url);
               $rows{$url} = $hashref;
               $legacy{$url} = 1;
               &Apache::lonxml::extlink($url);
               &Apache::lonnet::allowuploaded('/adm/essayresponse',$url);
           } else {
               push(@bad_file_list,$error);
           }
       }
       if ($portfiles =~ /[^\s]/) {
           my $prefix = "/uploaded/$udom/$uname/portfolio";
           foreach my $file (split(/\s*,\s*/,&unescape($portfiles))) {
               my ($path,$name) = ($file =~ m{^(.*/)([^/]+)$});
               my $url = $prefix.$path.$name;
               my $uploadedfile = &HTML::Entities::encode($url,'<>&"');
               my ($status,$hashref,$error) =
                   &current_file_info($url,$uploadedfile,$name,$path);
               if ($status eq 'ok') {
                   push(@{$okfiles{$name}},$url);
                   $rows{$url} = $hashref;
               } else {
                   push(@bad_file_list,$error);
               }
           }
       }
       my $num = 0;
       foreach my $name (sort(keys(%okfiles))) {
           if (ref($okfiles{$name}) eq 'ARRAY') {
               foreach my $url (@{$okfiles{$name}}) {
                   if (ref($rows{$url}) eq 'HASH') {
                       my $link = $rows{$url}{link};
                       my $portfile = $rows{$url}{path}.$rows{$url}{name};
                       $portfile = &HTML::Entities::encode($portfile,'<>&"');
                       if ($link) {
                           my $icon=&Apache::loncommon::icon($url);
                           unless ($header_shown) {
                               $result .= $header;
                               $header_shown = 1;
                           }
                           $result.=
                               &Apache::loncommon::start_data_table_row()."\n";
                           if ($Apache::inputtags::status[-1] eq 'CAN_ANSWER') {
                               $result .=
                                    '<td valign="bottom"><input type="checkbox" name="HWFILE'.$jspart.'_'.$id.'_delete"'.
                                    ' value="'.$portfile.'" id="HWFILE'.$jspart.'_'.$id.'_'.$num.'_delete" /></td>'."\n";
                               $num ++;
                           }
                           my $showname = $rows{$url}{path}.$name;
                           if ($legacy{$url}) {
                               $showname = $name.' '.&mt('not in portfolio');
                           }
                           $result .= 
                               '<td><a href="'.$link.'"><img src="'.$icon.
                               '" border="0" alt="" />'.$showname.'</a></td>'."\n".
                               '<td align="right" valign="bottom">'.$rows{$url}{size}.'</td>'."\n".
                               '<td align="right" valign="bottom">'.$rows{$url}{lastmodified}.'</td>'."\n".
                               &Apache::loncommon::end_data_table_row();
                       }
                   }
               }
           }
       }
       if ($header_shown) {
           $result .= &Apache::loncommon::end_data_table().
                      '<br /><span class="LC_warning">'.
                      &mt('Exclude existing file(s) from grading by checking the "Delete?" checkbox(es) and clicking "Submit Answer"').'</span>';
       }
       if (@bad_file_list) {
           my $bad_files = '<span class="LC_filename">'.
               join('</span>, <span class="LC_filename">',@bad_file_list).
               '</span>';
           $result.='<p class="LC_error">'.
                    &mt("These file(s) don't exist: [_1]",$bad_files).
                    '</p>';
       }
       return $result;
   }
   
   sub current_file_info {
       my ($url,$uploadedfile,$name,$path) = @_;
       my ($status,$error,%info);
       my @stat = &Apache::lonnet::stat_file($url);
       if ((@stat) && ($stat[0] ne 'no_such_dir')) {
           my ($lastmod,$size);
           if ($stat[9] =~ /^\d+$/) {
               $lastmod = &Apache::lonlocal::locallocaltime($stat[9]);
           }
           $size = $stat[7]/(1024*1024);
           $size = sprintf("%.3f",$size);
           %info = (
                       link         => $uploadedfile,
                       name         => $name,
                       path         => $path,
                       size         => $size,
                       lastmodified => $lastmod,
                   );
           $status = 'ok';
       } else {
           &Apache::lonnet::logthis("bad file is $url");
           my $icon=&Apache::loncommon::icon($url);
           $error = '<a href="'.$url.'"><img src="'.$icon.
                    '" border="0" />'.$uploadedfile.'</a>';
       }
       return ($status,\%info,$error);
   }
   
   sub valid_award {
       my ($award) =@_;
       foreach my $possibleaward ('EXTRA_ANSWER','MISSING_ANSWER', 'ERROR',
          'NO_RESPONSE',
          'TOO_LONG', 'UNIT_INVALID_INSTRUCTOR',
          'UNIT_INVALID_STUDENT', 'UNIT_IRRECONCIBLE',
          'UNIT_FAIL', 'NO_UNIT',
          'UNIT_NOTNEEDED', 'WANTED_NUMERIC',
          'BAD_FORMULA', 'NOT_FUNCTION', 'WRONG_FORMAT', 
                                  'INTERNAL_ERROR', 'SIG_FAIL', 'INCORRECT', 
          'MISORDERED_RANK', 'INVALID_FILETYPE',
                                  'EXCESS_FILESIZE', 'FILENAME_INUSE', 
          'DRAFT', 'SUBMITTED', 'SUBMITTED_CREDIT', 
                                  'ANONYMOUS', 'ANONYMOUS_CREDIT',
                                  'ASSIGNED_SCORE', 'APPROX_ANS',
          'EXACT_ANS','COMMA_FAIL') {
    if ($award eq $possibleaward) { return 1; }
       }
       return 0;
   }
   
   {
       my @awards = ('EXTRA_ANSWER', 'MISSING_ANSWER', 'ERROR', 'NO_RESPONSE',
     'TOO_LONG',
     'UNIT_INVALID_INSTRUCTOR', 'UNIT_INVALID_STUDENT',
     'UNIT_IRRECONCIBLE', 'UNIT_FAIL', 'NO_UNIT',
     'UNIT_NOTNEEDED', 'WANTED_NUMERIC', 'BAD_FORMULA',  'NOT_FUNCTION', 
                     'WRONG_FORMAT', 'INTERNAL_ERROR',
     'COMMA_FAIL', 'SIG_FAIL', 'INCORRECT', 'MISORDERED_RANK',
     'INVALID_FILETYPE', 'EXCESS_FILESIZE', 'FILENAME_INUSE', 
                     'DRAFT', 'SUBMITTED',
                     'SUBMITTED_CREDIT', 'ANONYMOUS', 'ANONYMOUS_CREDIT',
                     'ASSIGNED_SCORE', 'APPROX_ANS', 'EXACT_ANS');
       my $i=0;
       my %fwd_awards = map { ($_,$i++) } @awards;
       my $max=scalar(@awards);
       @awards=reverse(@awards);
       $i=0;
       my %rev_awards = map { ($_,$i++) } @awards;
   
   sub awarddetail_to_awarded {
       my ($awarddetail) = @_;
       if ($awarddetail eq 'EXACT_ANS'
    || $awarddetail eq 'APPROX_ANS') {
    return 1;
       }
       return 0;
   }
   
   sub hide_award {
       my ($award) = @_;
       if (&Apache::lonhomework::show_no_problem_status()) {
    return 1;
       }
       if ($award =~
    /^(?:EXACT_ANS|APPROX_ANS|SUBMITTED|SUBMITTED_CREDIT|ANONYMOUS|ANONYMOUS_CREDIT|ASSIGNED_SCORE|INCORRECT)/) {
    return 1;
       }
       return 0;
 }  }
   
 sub finalizeawards {  sub finalizeawards {
   my $result='';      my ($awardref,$msgref,$nameref,$reverse,$final_scantron)=@_;
   my $award;      my $result;
   if ($#_ == '-1') { $result = "NO_RESPONSE"; }      if ($#$awardref == -1) { $result = "NO_RESPONSE"; }
   foreach $award (@_) { if ($award eq '') {$result='MISSING_ANSWER'; last;}}      if ($result eq '' ) {
   if ($result eq '' ) {   my $blankcount;
     foreach $award (@_) {    foreach my $award (@$awardref) {
       if ($award eq 'UNIT_FAIL' ||      if ($award eq '') {
   $award eq 'NO_UNIT' ||   $result='MISSING_ANSWER';
   $award eq 'UNIT_NOTNEEDED') {   $blankcount++;
  $result=$award; last;      }
       }   }
     }   if ($blankcount == ($#$awardref + 1)) {
   }      return ('NO_RESPONSE');
   if ($result eq '' ) {   }
     foreach $award (@_) {       }
       if ($award eq 'WANTED_NUMERIC' ||   
   $award eq 'BAD_FORMULA') {$result=$award; last;}      if ($Apache::lonxml::internal_error) { $result='INTERNAL_ERROR'; }
     }  
   }      if (!$final_scantron && defined($result)) { return ($result); }
   if ($result eq '' ) {  
     foreach $award (@_) { if ($award eq 'SIG_FAIL') {$result=$award; last;} }      # if in scantron mode, if the award for any response is 
   }      # assigned score, then the part gets an assigned score
   if ($result eq '' ) {      if ($final_scantron 
     foreach $award (@_) { if ($award eq 'INCORRECT') {$result=$award; last;} }   && grep {$_ eq 'ASSIGNED_SCORE'} (@$awardref)) {
   }   return ('ASSIGNED_SCORE');
   if ($result eq '' ) {      }
     foreach $award (@_) { if ($award eq 'APPROX_ANS') {$result=$award; last;} }  
   }      # if in scantron mode, if the award for any response is 
   if ($result eq '' ) { $result='EXACT_ANS'; }      # correct and there are non-correct responses,
   return $result      # then the part gets an assigned score
       if ($final_scantron 
    && (grep { $_ eq 'EXACT_ANS' ||
      $_ eq 'APPROX_ANS'  } (@$awardref))
    && (grep { $_ ne 'EXACT_ANS' &&
      $_ ne 'APPROX_ANS'  } (@$awardref))) {
    return ('ASSIGNED_SCORE');
       }
       # these awards are ordered from most important error through best correct
       my $awards = (!$reverse) ? \%fwd_awards : \%rev_awards ;
   
       my $best = $max;
       my $j=0;
       my $which;
       foreach my $award (@$awardref) {
    if ($awards->{$award} < $best) {
       $best  = $awards->{$award};
       $which = $j;
    }
    $j++;
       }
   
       if (defined($which)) {
    if (ref($nameref)) {
       return ($$awardref[$which],$$msgref[$which],$$nameref[$which]);
    } else {
       return ($$awardref[$which],$$msgref[$which]);
    }
       }
       return ('ERROR',undef);
   }
 }  }
   
 sub decideoutput {  sub decideoutput {
   my ($award)=@_;      my ($award,$awarded,$awardmsg,$solved,$previous,$target,$nocorrect)=@_;
   my $message='';  
   my $button=0;      my $message='';
   if      ($award eq 'EXACT_ANS' || $award eq 'APPROX_ANS' ) {      my $button=0;
     $message = "Correct computer gets %s";      my $previousmsg;
     $button=0;      my $css_class='orange';
   } elsif ($award eq 'NO_RESPONSE') {      my $added_computer_text=0;
     $message = '';      my %possible_class =
     $button=1;   ( 'correct'         => 'LC_answer_correct',
   } elsif ($award eq 'MISSING_ANSWER') {    'charged_try'     => 'LC_answer_charged_try',
     $message = 'Some parts were not submitted';    'not_charged_try' => 'LC_answer_not_charged_try',
     $button = 1;    'no_grade'        => 'LC_answer_no_grade',
   } elsif ($award eq 'WANTED_NUMERIC') {    'no_message'      => 'LC_no_message',
     $message = "This question expects a numeric answer";    );
     $button=1;  
   } elsif ($award eq 'SIG_FAIL') {      my $part = $Apache::inputtags::part;
     $message = "Please adjust significant figures, you provided %s significant figures";      my $tohandgrade = &Apache::lonnet::EXT("resource.$part.handgrade");
     $button=1;      my $handgrade = ('yes' eq lc($tohandgrade)); 
   } elsif ($award eq 'UNIT_FAIL') {  #
     $message = "Units incorrect, Computer reads units as %s";  # Should "Computer's Answer" be displayed?
     $button=1;  # Should not be displayed if still answerable,
   } elsif ($award eq 'UNIT_NOTNEEDED') {  # if the problem is handgraded,
     $message = "Only a number required, Computer reads units of %s";  # or if the problem does not give a correct answer
     $button=1;  #
   } elsif ($award eq 'NO_UNIT') {      
     $message = "Units required";      my $computer = ($handgrade || $nocorrect)? ''
     $button=1;                         : " ".&mt("Computer's answer now shown above.");
   } elsif ($award eq 'BAD_FORMULA') {      &Apache::lonxml::debug("handgrade has :$handgrade:");
     $message = "Unable to understand formula";  
     $button=1;      if ($previous) { $previousmsg=&mt('You have entered that answer before'); }
   } elsif ($award eq 'INCORRECT') {      
     $message = "Incorrect";      if ($solved =~ /^correct/) {
     $button=1;          $css_class=$possible_class{'correct'};
   } else {   $message=&mt('You are correct.');
     $message = "Unknown message: $award";   if ($awarded < 1 && $awarded > 0) {
     $button=1;      $message=&mt('You are partially correct.');
   }      $css_class=$possible_class{'not_charged_try'};
   return ($button,$message);   } elsif ($awarded < 1) {
       $message=&mt('Incorrect.');
       $css_class=$possible_class{'charged_try'};
    }
    if ($handgrade || 
               ($env{'request.filename'}=~/\/res\/lib\/templates\/(examupload|DropBox).problem$/)) {
       $message = &mt("A score has been assigned.");
       $added_computer_text=1;
    } else {
       if ($target eq 'tex') {
    $message = '\textbf{'.$message.'}';
       } else {
    $message = "<b>".$message."</b>";
    $message.= $computer;
       }
       $added_computer_text=1;
       if ($awarded > 0) {
    my ($symb) = &Apache::lonnet::whichuser();
    if (($symb ne '') 
       &&
       ($env{'course.'.$env{'request.course.id'}.
         '.disable_receipt_display'} ne 'yes') &&
                       ($Apache::lonhomework::type ne 'practice')) { 
       $message.=(($target eq 'web')?'<br />':' ').
    &mt('Your receipt no. is [_1]',
       (&Apache::lonnet::receipt($Apache::inputtags::part).
        (($target eq 'web')?&Apache::loncommon::help_open_topic('Receipt'):'')));
    }
       }
    }
           if ($awarded >= 1) {
               $button=0;
           } elsif (&Apache::lonnet::EXT("resource.$part.retrypartial") !~/^1|on|yes$/i) {
               $button=0;
           } else {
               $button=1;
           }
    $previousmsg='';
       } elsif ($solved =~ /^excused/) {
    if ($target eq 'tex') {
       $message = ' \textbf{'.&mt('You are excused from the problem.').'} ';
    } else {
       $message = "<b>".&mt('You are excused from the problem.')."</b>";
    }
    $css_class=$possible_class{'charged_try'};
    $button=0;
    $previousmsg='';
       } elsif ($award eq 'EXACT_ANS' || $award eq 'APPROX_ANS' ) {
    if ($solved =~ /^incorrect/ || $solved eq '') {
       $message = &mt("Incorrect").".";
       $css_class=$possible_class{'charged_try'};
       $button=1;
    } else {
       if ($target eq 'tex') {
    $message = '\textbf{'.&mt('You are correct.').'}';
       } else {
    $message = "<b>".&mt('You are correct.')."</b>";
    $message.= $computer;
       }
       $added_computer_text=1;
       if  ($awarded > 0 
    && $env{'course.'.
        $env{'request.course.id'}.
        '.disable_receipt_display'} ne 'yes') { 
    $message.=(($target eq 'web')?'<br />':' ').
       &mt('Your receipt is [_1]',
    (&Apache::lonnet::receipt($Apache::inputtags::part).
    (($target eq 'web')?&Apache::loncommon::help_open_topic('Receipt'):'')));
       }
       $css_class=$possible_class{'correct'};
       $button=0;
       $previousmsg='';
    }
       } elsif ($award eq 'NO_RESPONSE') {
    $message = '';
    $css_class=$possible_class{'no_feedback'};
    $button=1;
       } elsif ($award eq 'EXTRA_ANSWER') {
    $message = &mt('Some extra items were submitted.');
    $css_class=$possible_class{'not_charged_try'};
    $button = 1;
       } elsif ($award eq 'MISSING_ANSWER') {
    $message = &mt('Some items were not submitted.');
           if ($target ne 'tex') {
              $message .= &Apache::loncommon::help_open_topic('Some_Items_Were_Not_Submitted');
           }
    $css_class=$possible_class{'not_charged_try'};
    $button = 1;
       } elsif ($award eq 'ERROR') {
    $message = &mt('An error occurred while grading your answer.');
    $css_class=$possible_class{'not_charged_try'};
    $button = 1;
       } elsif ($award eq 'TOO_LONG') {
    $message = &mt("The submitted answer was too long.");
    $css_class=$possible_class{'not_charged_try'};
    $button=1;
       } elsif ($award eq 'WANTED_NUMERIC') {
    $message = &mt("This question expects a numeric answer.");
    $css_class=$possible_class{'not_charged_try'};
    $button=1;
       } elsif ($award eq 'MISORDERED_RANK') {
           $message = &mt('You have provided an invalid ranking.');
           if ($target ne 'tex') {
               $message.=' '.&mt('Please refer to [_1]',&Apache::loncommon::help_open_topic('Ranking_Problems',&mt('help on ranking problems')));
           }
    $css_class=$possible_class{'not_charged_try'};
    $button=1;
       } elsif ($award eq 'EXCESS_FILESIZE') {
           $message = &mt('Submission won\'t be graded. The combined size of submitted files exceeded the amount allowed.');
           $css_class=$possible_class{'not_charged_try'};
           $button=1;
       } elsif ($award eq 'FILENAME_INUSE') {
           $message = &mt('You have already uploaded a file with that filename.');
           if ($target eq 'tex') {
               $message.= "\\\\\n";
           } else {
               $message .= '<br />';
           }
           $message .= &mt('Please use a different file name.');
           $css_class=$possible_class{'not_charged_try'};
           $button=1;
       } elsif ($award eq 'INVALID_FILETYPE') {
    $message = &mt("Submission won't be graded. The type of file submitted is not allowed.");
    $css_class=$possible_class{'not_charged_try'};
    $button=1;
       } elsif ($award eq 'SIG_FAIL') {
    my ($used,$min,$max)=split(':',$awardmsg);
    my $word = ($used < $min) ? 'more' : 'fewer';
    $message = &mt("Submission not graded. Use $word digits.",$used);
    $css_class=$possible_class{'not_charged_try'};
    $button=1;
       } elsif ($award eq 'UNIT_INVALID_INSTRUCTOR') {
    $message = &mt('Error in instructor specifed unit. This error has been reported to the instructor.', $awardmsg);
    if ($target ne 'tex') {$message.=&Apache::loncommon::help_open_topic('Physical_Units');} 
    $css_class=$possible_class{'not_charged_try'};
    $button=1;
       } elsif ($award eq 'UNIT_INVALID_STUDENT') {
    $message = &mt('Unable to interpret units. Computer reads units as "[_1]".',&markup_unit($awardmsg,$target));
    if ($target ne 'tex') {$message.=&Apache::loncommon::help_open_topic('Physical_Units');} 
    $css_class=$possible_class{'not_charged_try'};
    $button=1;
       } elsif ($award eq 'UNIT_FAIL' || $award eq 'UNIT_IRRECONCIBLE') {
    $message = &mt('Incompatible units. No conversion found between "[_1]" and the required units.',&markup_unit($awardmsg,$target));
    if ($target ne 'tex') {$message.=&Apache::loncommon::help_open_topic('Physical_Units');} 
    $css_class=$possible_class{'not_charged_try'};
    $button=1;
       } elsif ($award eq 'UNIT_NOTNEEDED') {
    $message = &mt('Only a number required. Computer reads units of "[_1]".',&markup_unit($awardmsg,$target));
    $css_class=$possible_class{'not_charged_try'};
    $button=1;
       } elsif ($award eq 'NO_UNIT') {
    $message = &mt("Units required").'.';
    if ($target ne 'tex') {$message.=&Apache::loncommon::help_open_topic('Physical_Units')};
    $css_class=$possible_class{'not_charged_try'};
    $button=1;
       } elsif ($award eq 'COMMA_FAIL') {
    $message = &mt("Proper comma separation is required").'.';
    $css_class=$possible_class{'not_charged_try'};
    $button=1;
       } elsif ($award eq 'BAD_FORMULA') {
    $message = &mt("Unable to understand formula").'.';
           if ($target ne 'tex') {$message.=&Apache::loncommon::help_open_topic('Formula_Answers')};
    $css_class=$possible_class{'not_charged_try'};
    $button=1;
       } elsif ($award eq 'NOT_FUNCTION') {
           $message = &mt("Not a function").'.';
           $css_class=$possible_class{'not_charged_try'};
           $button=1;
       } elsif ($award eq 'WRONG_FORMAT') {
           $message = &mt("Wrong format").'.';
           $css_class=$possible_class{'not_charged_try'};
           $button=1;
        } elsif ($award eq 'INTERNAL_ERROR') {
           $message = &mt("An internal error occurred while processing your answer. Please try again later.");
           $css_class=$possible_class{'not_charged_try'};
           $button=1;
       } elsif ($award eq 'INCORRECT') {
    $message = &mt("Incorrect").'.';
    $css_class=$possible_class{'charged_try'};
    $button=1;
       } elsif ($award eq 'SUBMITTED') {
    $message = &mt("Your submission has been recorded.");
    $css_class=$possible_class{'no_grade'};
    $button=1;
       } elsif ($award eq 'SUBMITTED_CREDIT') {
           $message = &mt("Your submission has been recorded, and credit awarded.");
           $css_class=$possible_class{'correct'};
           $button=1;
       } elsif ($award eq 'ANONYMOUS') {
           $message = &mt("Your anonymous submission has been recorded.");
           $css_class=$possible_class{'no_grade'};
           $button=1;
       } elsif ($award eq 'ANONYMOUS_CREDIT') {
           $message = &mt("Your anonymous submission has been recorded, and credit awarded.");
           $css_class=$possible_class{'correct'};
           $button=1;
       } elsif ($award eq 'DRAFT') {
    $message = &mt("Copy saved but not submitted.");
    $css_class=$possible_class{'not_charged_try'};
    $button=1;
       } elsif ($award eq 'ASSIGNED_SCORE') {
    $message = &mt("A score has been assigned.");
    $css_class=$possible_class{'correct'};
    $button=0;
       } elsif ($award eq '') {
    if ($handgrade && $Apache::inputtags::status[-1] eq 'SHOW_ANSWER') {
       $message = &mt("Nothing submitted.");
       $css_class=$possible_class{'charged_try'};
    } else {
       $css_class=$possible_class{'not_charged_try'};
    }
    $button=1;
       } else {
    $message = &mt("Unknown message").": $award";
    $button=1;
       }
       my (undef,undef,$domain,$user)=&Apache::lonnet::whichuser();
       foreach my $resid(@Apache::inputtags::response){
           if ($Apache::lonhomework::history{"resource.$part.$resid.handback"}) {
               if ($target eq 'tex') {
                   $message.= "\\\\\n";
               } else {
                   $message.='<br />';
               }
       my @files = split(/\s*,\s*/,
         $Apache::lonhomework::history{"resource.$part.$resid.handback"});
       my $file_msg;
       foreach my $file (@files) {
                   if ($target eq 'tex') {
                       $file_msg.= "\\\\\n".$file;
                   } else {
                       $file_msg.= '<br /><a href="/uploaded/'."$domain/$user".'/'.$file.'">'.$file.'</a>';
                   }
       }
       $message .= &mt('Returned file(s): [_1]',$file_msg);
               if ($target eq 'tex') {
                   $message.= "\\\\\n";
               } else {
                   $message.='<br />';
               }
    }
       }
   
       if (&Apache::lonhomework::hide_problem_status()
    && $Apache::inputtags::status[-1] ne 'SHOW_ANSWER'
    && &hide_award($award)) {
    $message = &mt("Answer Submitted: Your final submission will be graded after the due date.");
    $css_class=$possible_class{'no_grade'};
    $button=1;
       }
       if ($Apache::inputtags::status[-1] eq 'SHOW_ANSWER' && 
    !$added_computer_text && $target ne 'tex') {
    $message.= $computer;
    $added_computer_text=1;
       }
       if ($Apache::lonhomework::type eq 'practice') {
          if ($target eq 'web') {
              $message .= '<br />';
          } else {
              $message .= ' ';      
          }
          $message.=&mt('Submissions to practice problems are not permanently recorded.');
       }
       return ($button,$css_class,$message,$previousmsg);
   }
   
   sub markup_unit {
       my ($unit,$target)=@_;
       if ($target eq 'tex') {
    return '\texttt{'.&Apache::lonxml::latex_special_symbols($unit).'}'; 
       } else {
    return "<tt>".$unit."</tt>";
       }
   }
   
   sub removealldata {
       my ($id)=@_;
       foreach my $key (keys(%Apache::lonhomework::results)) {
    if (($key =~ /^resource\.\Q$id\E\./) && ($key !~ /\.collaborators$/)) {
       &Apache::lonxml::debug("Removing $key");
       delete($Apache::lonhomework::results{$key});
    }
       }
   }
   
   sub hidealldata {
       my ($id)=@_;
       foreach my $key (keys(%Apache::lonhomework::results)) {
    if (($key =~ /^resource\.\Q$id\E\./) && ($key !~ /\.collaborators$/)) {
       &Apache::lonxml::debug("Hidding $key");
       my $newkey=$key;
       $newkey=~s/^(resource\.\Q$id\E\.[^\.]+\.)(.*)$/${1}hidden${2}/;
       $Apache::lonhomework::results{$newkey}=
    $Apache::lonhomework::results{$key};
       delete($Apache::lonhomework::results{$key});
    }
       }
 }  }
   
 sub setgradedata {  sub setgradedata {
   my ($award,$id) = @_;      my ($award,$msg,$id,$previously_used) = @_;
   if ( $award eq 'APPROX_ANS' || $award eq 'EXACT_ANS' ) {      if ($Apache::lonhomework::scantronmode && 
     $Apache::lonhomework::results{"resource.tries.$id"} =   &Apache::lonnet::validCODE($env{'form.CODE'})) {
       $Apache::lonhomework::history{"resource.tries.$id"} + 1;   $Apache::lonhomework::results{"resource.CODE"}=$env{'form.CODE'};
     $Apache::lonhomework::results{"resource.solved.$id"} =      } elsif ($Apache::lonhomework::scantronmode && 
       'correct_by_student';       $env{'form.CODE'} eq '' &&
     $Apache::lonhomework::results{"resource.awarded.$id"} = '1';       $Apache::lonhomework::history{"resource.CODE"} ne '') {
   } elsif ( $award eq 'INCORRECT' ) {   $Apache::lonhomework::results{"resource.CODE"}='';
     $Apache::lonhomework::results{"resource.tries.$id"} =      }
       $Apache::lonhomework::history{"resource.tries.$id"} + 1;  
     $Apache::lonhomework::results{"resource.solved.$id"} =      if (!$Apache::lonhomework::scantronmode &&
       'incorrect_attempted';   $Apache::inputtags::status['-1'] ne 'CAN_ANSWER' &&
   } else {   $Apache::inputtags::status['-1'] ne 'CANNOT_ANSWER') {
     $Apache::lonhomework::results{"resource.solved.$id"} =   $Apache::lonhomework::results{"resource.$id.afterduedate"}=$award;
       'incorrect_attempted';   return '';
   }      } elsif ( $Apache::lonhomework::history{"resource.$id.awarded"} < 1
   $Apache::lonhomework::results{"resource.award.$id"} = $award;        || $Apache::lonhomework::scantronmode 
         || &Apache::lonhomework::hide_problem_status()  ) {
           # the student doesn't already have it correct,
    # or we are in a mode (scantron orno problem status) where a correct 
           # can become incorrect
    # handle assignment of tries and solved status
    my $solvemsg;
    if ($Apache::lonhomework::scantronmode) {
       $solvemsg='correct_by_scantron';
    } else {
       $solvemsg='correct_by_student';
    }
    if ($Apache::lonhomework::history{"resource.$id.afterduedate"}) {
       $Apache::lonhomework::results{"resource.$id.afterduedate"}='';
    }
    if ( $award eq 'ASSIGNED_SCORE') {
       $Apache::lonhomework::results{"resource.$id.tries"} =
    $Apache::lonhomework::history{"resource.$id.tries"} + 1;
       $Apache::lonhomework::results{"resource.$id.solved"} =
    $solvemsg;
       my $numawards=scalar(@Apache::inputtags::response);
       $Apache::lonhomework::results{"resource.$id.awarded"} = 0;
       foreach my $res (@Apache::inputtags::response) {
    if (defined($Apache::lonhomework::results{"resource.$id.$res.awarded"})) {
       $Apache::lonhomework::results{"resource.$id.awarded"}+=
    $Apache::lonhomework::results{"resource.$id.$res.awarded"};
    } else {
       $Apache::lonhomework::results{"resource.$id.awarded"}+=
    &awarddetail_to_awarded($Apache::lonhomework::results{"resource.$id.$res.awarddetail"});
    }
       }
       if ($numawards > 0) {
    $Apache::lonhomework::results{"resource.$id.awarded"}/=
       $numawards;
       }
    } elsif ( $award eq 'APPROX_ANS' || $award eq 'EXACT_ANS' ) {
       $Apache::lonhomework::results{"resource.$id.tries"} =
    $Apache::lonhomework::history{"resource.$id.tries"} + 1;
       $Apache::lonhomework::results{"resource.$id.solved"} =
    $solvemsg;
       $Apache::lonhomework::results{"resource.$id.awarded"} = '1';
           } elsif ( $award eq 'SUBMITTED_CREDIT' ) {
               $Apache::lonhomework::results{"resource.$id.tries"} =
                   $Apache::lonhomework::history{"resource.$id.tries"} + 1;
               $Apache::lonhomework::results{"resource.$id.solved"} =
                   'credit_attempted';
               $Apache::lonhomework::results{"resource.$id.awarded"} = '1';
           }  elsif ( $award eq 'ANONYMOUS_CREDIT' ) {
               $Apache::lonhomework::results{"resource.$id.tries"} =
                   $Apache::lonhomework::history{"resource.$id.tries"} + 1;
               $Apache::lonhomework::results{"resource.$id.solved"} =
                   'credit_attempted';
               $Apache::lonhomework::results{"resource.$id.awarded"} = '1';
    } elsif ( $award eq 'INCORRECT' ) {
       $Apache::lonhomework::results{"resource.$id.tries"} =
    $Apache::lonhomework::history{"resource.$id.tries"} + 1;
       if (&Apache::lonhomework::hide_problem_status()
    || $Apache::lonhomework::scantronmode) {
    $Apache::lonhomework::results{"resource.$id.awarded"} = 0;
       }
       $Apache::lonhomework::results{"resource.$id.solved"} =
    'incorrect_attempted';
    } elsif ( $award eq 'SUBMITTED' ) {
       $Apache::lonhomework::results{"resource.$id.tries"} =
    $Apache::lonhomework::history{"resource.$id.tries"} + 1;
       $Apache::lonhomework::results{"resource.$id.solved"} =
    'ungraded_attempted';
           }  elsif ( $award eq 'ANONYMOUS' ) {
               $Apache::lonhomework::results{"resource.$id.tries"} =
                   $Apache::lonhomework::history{"resource.$id.tries"} + 1;
               $Apache::lonhomework::results{"resource.$id.solved"} =
                   'ungraded_attempted';
    } elsif ( $award eq 'DRAFT' ) {
       $Apache::lonhomework::results{"resource.$id.solved"} = '';
    } elsif ( $award eq 'NO_RESPONSE' ) {
       #no real response so delete any data that got stored
       &removealldata($id);
       return '';
    } else {
       $Apache::lonhomework::results{"resource.$id.solved"} =
    'incorrect_attempted';
       if (&Apache::lonhomework::show_no_problem_status()
    || $Apache::lonhomework::scantronmode) {
    $Apache::lonhomework::results{"resource.$id.tries"} =
       $Apache::lonhomework::history{"resource.$id.tries"} + 1;
    $Apache::lonhomework::results{"resource.$id.awarded"} = 0;
       }
   
       if (&Apache::lonhomework::show_some_problem_status()) {
    # clear out the awarded if they had gotten it wrong/right
    # and are now in an error mode
    $Apache::lonhomework::results{"resource.$id.awarded"} = '';
       }
    }
    if (defined($msg)) {
       $Apache::lonhomework::results{"resource.$id.awardmsg"} = $msg;
    }
    # did either of the overall awards chage? If so ignore the 
    # previous check
    if (($Apache::lonhomework::results{"resource.$id.awarded"} eq
        $Apache::lonhomework::history{"resource.$id.awarded"}) &&
       ($Apache::lonhomework::results{"resource.$id.solved"} eq
        $Apache::lonhomework::history{"resource.$id.solved"})) {
       # check if this was a previous submission if it was delete the
       # unneeded data and update the previously_used attribute
       if ( $previously_used eq 'PREVIOUSLY_USED') {
    if (&Apache::lonhomework::show_problem_status()) {
       delete($Apache::lonhomework::results{"resource.$id.tries"});
       $Apache::lonhomework::results{"resource.$id.previous"} = '1';
    }
       } elsif ( $previously_used eq 'PREVIOUSLY_LAST') {
    #delete all data as they student didn't do anything, but save
    #the list of collaborators.
    &removealldata($id);
    #and since they didn't do anything we were never here
    return '';
       } else {
    $Apache::lonhomework::results{"resource.$id.previous"} = '0';
       }
    }
       } elsif ( $Apache::lonhomework::history{"resource.$id.awarded"} == 1 ) {
    #delete all data as they student already has it correct
    &removealldata($id);
    #and since they didn't do anything we were never here
    return '';
       }
       $Apache::lonhomework::results{"resource.$id.award"} = $award;
       if ($award eq 'SUBMITTED') {
    &Apache::response::add_to_gradingqueue();
       }
       $Apache::lonhomework::results{"resource.$id.type"} = $Apache::lonhomework::type;
       $Apache::lonhomework::results{"resource.$id.duedate"} = &Apache::lonnet::EXT("resource.$id.duedate");
       $Apache::lonhomework::results{"resource.$id.hinttries"} = &Apache::lonnet::EXT("resource.$id.hinttries");
       $Apache::lonhomework::results{"resourse.$id.version"} = &Apache::lonnet::usedversion(); 
   }
   
   sub find_which_previous {
       my ($version) = @_;
       my $part = $Apache::inputtags::part;
       my (@previous_version);
       foreach my $resp (@Apache::inputtags::response) {
    my $key = "$version:resource.$part.$resp.submission";
    my $submission = $Apache::lonhomework::history{$key};
    my %previous = &Apache::response::check_for_previous($submission,
        $part,$resp,
        $version);
    push(@previous_version,$previous{'version'});
       }
       return &previous_match(\@previous_version,
      scalar(@Apache::inputtags::response));
   }
   
   sub previous_match {
       my ($previous_array,$count) = @_;
       my $match = 0;
       my @matches;
       foreach my $versionar (@$previous_array) {
    foreach my $version (@$versionar) {
       $matches[$version]++;
    }
       }
       my $which=0;
       foreach my $elem (@matches) {
    if ($elem eq $count) {
       $match=1;
       last;
    }
    $which++;
       }
       return ($match,$which);
 }  }
   
 sub grade {  sub grade {
   my ($target) = @_;      my ($target) = @_;
   my $id = $Apache::inputtags::part;      my $id = $Apache::inputtags::part;
   my $result='';      my $response='';
   my $response='';      if ( defined $env{'form.submitted'}) {
   if ( $target == 'web' ) {   my (@awards,@msgs);
     if ( defined $ENV{'form.submit'}) {   foreach $response (@Apache::inputtags::response) {
       my @awards = ();      &Apache::lonxml::debug("looking for response.$id.$response.awarddetail");
       &Apache::lonxml::debug("$#Apache::inputtags::responselist");      my $value=$Apache::lonhomework::results{"resource.$id.$response.awarddetail"};
       foreach $response (@Apache::inputtags::responselist) {      &Apache::lonxml::debug("keeping $value from $response for $id");
  &Apache::lonxml::debug("looking for response.awarddetail.$id.$response");      push (@awards,$value);
  my $value=$Apache::lonhomework::results{"resource.awarddetail.$id.$response"};      $value=$Apache::lonhomework::results{"resource.$id.$response.awardmsg"};
  if ( $value ne '' ) {      &Apache::lonxml::debug("got message $value from $response for $id");
   &Apache::lonxml::debug("keep ing $value from $response for $id");      push (@msgs,$value);
   push (@awards,$value);   }
  } else {   my ($finalaward,$msg) = 
   &Apache::lonxml::debug("skipping $value from $response for $id");      &finalizeawards(\@awards,\@msgs,undef,undef,
  }      $Apache::lonhomework::scantronmode);
       }   my $previously_used;
       my $finalaward = &finalizeawards(@awards);   if ( $#Apache::inputtags::previous eq $#awards ) {
       &Apache::lonxml::debug("final award $finalaward");      my ($match) =
       &setgradedata($finalaward,$id);   &previous_match(\@Apache::inputtags::previous_version,
    scalar(@Apache::inputtags::response));
   
       if ($match) {
    $previously_used = 'PREVIOUSLY_LAST';
    foreach my $value (@Apache::inputtags::previous) {
       if ($value eq 'PREVIOUSLY_USED' ) {
    $previously_used = $value;
    last;
       }
    }
       }
    }
    &Apache::lonxml::debug("final award $finalaward, $previously_used, message $msg");
    &setgradedata($finalaward,$msg,$id,$previously_used);
       }
       return '';
   }
   
   sub get_grade_messages {
       my ($id,$prefix,$target,$status,$nocorrect) = @_;
   # nocorrect suppresses "Computer's answer now shown above"
       my ($message,$latemessage,$trystr,$previousmsg);
       my $showbutton = 1;
   
       my $award = $Apache::lonhomework::history{"$prefix.award"};
       my $awarded = $Apache::lonhomework::history{"$prefix.awarded"};
       my $solved = $Apache::lonhomework::history{"$prefix.solved"};
       my $previous = $Apache::lonhomework::history{"$prefix.previous"};
       my $awardmsg = $Apache::lonhomework::history{"$prefix.awardmsg"};
       &Apache::lonxml::debug("Found Award |$award|$solved|$awardmsg");
       if ( $award ne '' || $solved ne '' || $status eq 'SHOW_ANSWER') {
    &Apache::lonxml::debug('Getting message');
    ($showbutton,my $css_class,$message,$previousmsg) =
       &decideoutput($award,$awarded,$awardmsg,$solved,$previous,
     $target,(($status eq 'CAN_ANSWER') || $nocorrect));
    if ($target eq 'tex') {
       $message='\vskip 2 mm '.$message.' ';
    } else {
       $message="<td class=\"$css_class\">$message</td>";
       if ($previousmsg) {
    $previousmsg="<td class=\"LC_answer_previous\">$previousmsg</td>";
       }
    }
     }      }
   }      my $tries = $Apache::lonhomework::history{"$prefix.tries"};
   return $result;      my $maxtries = &Apache::lonnet::EXT("resource.$id.maxtries");
       &Apache::lonxml::debug("got maxtries of :$maxtries:");
       #if tries are set to negative turn off the Tries/Button and messages
       if (defined($maxtries) && $maxtries < 0) { return ''; }
       if ( $tries eq '' ) { $tries = '0'; }
       if ( $maxtries eq '' ) { $maxtries = '2'; } 
       if ( $maxtries eq 'con_lost' ) { $maxtries = '0'; } 
       my $tries_text= &get_tries_text();
       if ($showbutton) {
    if ($target eq 'tex') {
       if ($env{'request.state'} ne "construct"
    && $Apache::lonhomework::type ne 'exam'
    && $env{'form.suppress_tries'} ne 'yes') {
    $trystr ='{\vskip 1 mm \small '
                           .&mt('[_1]'.$tries_text.'[_2] [_3]'
    ,'\textit{','}',$tries.'/'.$maxtries ) 
                           .'} \vskip 2 mm';
       } else {
    $trystr = '\vskip 0 mm ';
       }
    } else {
       my $trial =$tries;
       if ($Apache::lonhomework::parsing_a_task) {
       } elsif($env{'request.state'} ne 'construct') {
    $trial.="/".&Apache::lonhtmlcommon::direct_parm_link($maxtries,$env{'request.symb'},'maxtries',$id,$target);
       } else {
    if (defined($Apache::inputtags::params{'maxtries'})) {
       $trial.="/".$Apache::inputtags::params{'maxtries'};
    }
       }
       $trystr = '<td><span class="LC_nobreak">'.&mt($tries_text.' [_1]',$trial).'</span></td>';
    }
       }
   
       if ($Apache::lonhomework::history{"$prefix.afterduedate"}) {
    #last submissions was after due date
    $latemessage=&mt(' The last submission was after the Due Date ');;
    if ($target eq 'web') {
       $latemessage='<td class="LC_answer_late">'.$latemessage.'</td>';
    }
       }
       return ($previousmsg,$latemessage,$message,$trystr,$showbutton);
 }  }
   
 sub gradestatus {  sub gradestatus {
   my ($id) = @_;      my ($id,$target,$no_previous) = @_;
   my $showbutton = 1;      my $showbutton = 1;
   my $message = '';      my $message = '';
   my $award = $Apache::lonhomework::history{"resource.award.$id"};      my $latemessage = '';
   &Apache::lonxml::debug("Found Award |$award|");      my $trystr='';
   if ( $award ne '' ) {      my $button='';
     &Apache::lonxml::debug('Getting message');      my $previousmsg='';
     ($showbutton,$message) = &decideoutput($award);  
   }      my $status = $Apache::inputtags::status['-1'];
   my $button='';      &Apache::lonxml::debug("gradestatus has :$status:");
   my $tries = $Apache::lonhomework::history{"resource.tries.$id"};      if ( $status ne 'CLOSED' 
   my $maxtries = $Apache::lonhomework::history{"resource.maxtries.$id"};   && $status ne 'UNAVAILABLE' 
   if ( $tries eq '' ) { $tries = '0'; }   && $status ne 'INVALID_ACCESS' 
   if ( $maxtries eq '' ) { $maxtries = '2'; }    && $status ne 'NEEDS_CHECKIN' 
   my $trystr='';   && $status ne 'NOT_IN_A_SLOT'
   if ( $showbutton ) {           && $status ne 'RESERVABLE'
     $trystr = "<br></br>Tries $tries/$maxtries";           && $status ne 'RESERVABLE_LATER'
   }           && $status ne 'NOTRESERVABLE') {
   if ( $tries >= $maxtries ) { $showbutton = 0; }  
   if ( $showbutton ) {    ($previousmsg,$latemessage,$message,$trystr) =
     $button = '<input type="submit" name="submit" value="Submit All Answers"><br></br>';      &get_grade_messages($id,"resource.$id",$target,$status,
   }   $showbutton);
   return $button.$message.$trystr;   if ( $status eq 'SHOW_ANSWER' || $status eq 'CANNOT_ANSWER') {
       $showbutton = 0;
    }
    if ( $status eq 'SHOW_ANSWER') {
       undef($previousmsg);
    }
    if ( $showbutton ) { 
       if ($target ne 'tex') {
    $button = 
               '<input onmouseup="javascript:setSubmittedPart(\''.$id.'\');this.form.action+=\'#'.&escape($id).'\';"
                       type="submit" name="submit_'.$id.'"
                       value="'.&mt('Submit Answer').'" />';
       }
    }
   
       }
       my $output= $previousmsg.$latemessage.$message.$trystr;
       if ($output =~ /^\s*$/) {
    return $button;
       } else {
    if ($target eq 'tex') {
       return $button.' \vskip 0 mm '.$output.' ';
    } else {
       $output =
    '<table><tr><td>'.$button.'</td>'.$output;
       if (!$no_previous) {
    $output.='<td>'.&previous_tries($id,$target).'</td>';
       }
       $output.= '</tr></table>';
       return $output;
    }
       }
 }  }
   
   sub previous_tries {
       my ($id,$target) = @_;
       my $output;
       my $status = $Apache::inputtags::status['-1'];
   
       my $count;
       my %count_lookup;
       my $lastrndseed;
   
       foreach my $i (1..$Apache::lonhomework::history{'version'}) {
    my $prefix = $i.":resource.$id";
           my $is_anon; 
           if (defined($env{'form.grade_symb'})) {
               if (($Apache::lonhomework::history{"$prefix.type"} eq 'anonsurvey') || 
                   ($Apache::lonhomework::history{"$prefix.type"} eq 'anonsurveycred')) {
                   $is_anon = 1;
               }
           }
    next if (!exists($Apache::lonhomework::history{"$prefix.award"}));
    $count++;
    $count_lookup{$i} = $count;
           my $curr_rndseed = $Apache::lonhomework::history{"$prefix.rndseed"};
    my ($previousmsg,$latemessage,$message,$trystr);
   
    ($previousmsg,$latemessage,$message,$trystr) =
       &get_grade_messages($id,"$prefix",$target,$status);
   
    if ($previousmsg ne '') {
       my ($match,$which) = &find_which_previous($i);
       $message=$previousmsg;
       my $previous = $count_lookup{$which};
       $message =~ s{(</td>)}{ as submission \# $previous $1};
    } elsif ($Apache::lonhomework::history{"$prefix.tries"}) {
       if (!(&Apache::lonhomework::hide_problem_status()
     && $Apache::inputtags::status[-1] ne 'SHOW_ANSWER')
    && $Apache::lonhomework::history{"$prefix.solved"} =~/^correct/
    ) {
   
                   my $txt_correct = &mt('Correct');
                   my $awarded = $Apache::lonhomework::history{"$prefix.awarded"};
                   if ($awarded < 1 && $awarded > 0) {
                       $txt_correct=&mt('Partially Correct');
                   } elsif ($awarded < 1) {
                       if ($awarded eq '') {
                           $txt_correct='';
                       } else {
                           $txt_correct=&mt('Incorrect');
                       }
                   }
    $message =~ s{(<td.*?>)(.*?)(</td>)}
                                {$1 <strong>$txt_correct</strong>. $3}s;
       }
               my $trystr = "(".&mt('Try [_1]',$Apache::lonhomework::history{"$prefix.tries"}).")";
               if (($curr_rndseed || $lastrndseed) && ($i > 1)) {
                   if ($curr_rndseed ne $lastrndseed) {
                       $trystr .= '<br /><span style="color: green; white-space: nowrap; font-style: italic; font-weight: bold; font-size: 80%;">'.&mt('New problem variation this try.').'</span>';
                   }
               } 
       $message =~ s{(</td>)}{ $trystr $1};
    }
    my ($class) = ($message =~ m{<td.*class="([^"]*)"}); #"
    $message =~ s{(<td.*?>)}{<td>};
   
   
    $output.='<tr class="'.$class.'">';
    $output.='<td align="center">'.$count.'</td>';
    $output.=$message;
   
    foreach my $resid (@Apache::inputtags::response) {
       my $prefix = $prefix.".$resid";
       if (exists($Apache::lonhomework::history{"$prefix.submission"})) {
    my $submission =
       $Apache::inputtags::submission_display{"$prefix.submission"};
    if (!defined($submission)) {
       $submission = 
    $Apache::lonhomework::history{"$prefix.submission"};
    }
                   if ($is_anon) {
                       $output.='<td>'.&mt('(only shown to submitter)').'</td>';
                   } else {
       $output.='<td>'.$submission.'</td>';
                   }
       } else {
    $output.='<td></td>';
       }
    }
    $output.=&Apache::loncommon::end_data_table_row()."\n";
           $lastrndseed = $curr_rndseed;
       }
       return if ($output eq '');
       my $headers = 
    '<tr>'.'<th>'.&mt('Submission #').'</th><th>'.&mt('Try').
    '</th><th colspan="'.scalar(@Apache::inputtags::response).'">'.
    &mt('Submitted Answer').'</th>';
       $output ='<table class="LC_prior_tries">'.$headers.$output.'</table>';
   
       my $tries_text = &get_tries_text('link');
       my $prefix = $env{'form.request.prefix'};
       $prefix =~ tr{.}{_};
       my $function_name = "LONCAPA_previous_tries_".$prefix.
    $Apache::lonxml::curdepth.'_'.$env{'form.counter'};
       my $result = &Apache::loncommon::modal_adhoc_window($function_name,420,410,$output,&mt($tries_text))."<br />";
       return $result;
   }
   
   sub get_tries_text {
       my ($context) = @_;
       my $tries_text;
       if ($context eq 'link') {
           $tries_text = 'Previous Tries';
       } else {
           $tries_text = 'Tries';
       }
       if ( $Apache::lonhomework::type eq 'survey' ||
            $Apache::lonhomework::type eq 'surveycred' ||
            $Apache::lonhomework::type eq 'anonsurvey' ||
            $Apache::lonhomework::type eq 'anonsurveycred' ||
            $Apache::lonhomework::parsing_a_task) {
           if ($context eq 'link') {
               $tries_text = 'Previous Submissions';
           } else {
               $tries_text = 'Submissions';
           }
       }
       return $tries_text;
   }
   
 1;  1;
 __END__  __END__
   
   =pod
   
   =back
   
   =cut
     
Removed from v.1.14  
changed lines
  Added in v.1.303

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