loncom/homework/inputtags.pm - diff

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Diff for /loncom/homework/inputtags.pm between versions 1.18 and 1.160

-version 1.18, 2000/12/15 20:31:30
+version 1.160, 2005/03/31 21:24:29
  Line 1
  # The LearningOnline Network with CAPA
  # 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/
  package Apache::inputtags;
+ use HTML::Entities();
  use strict;
+ use Apache::loncommon;
+ use Apache::lonlocal;
- sub BEGIN {
+ BEGIN {
-   &Apache::lonxml::register('Apache::inputtags',('textarea','textline','datasubmission'));
+     &Apache::lonxml::register('Apache::inputtags',('hiddenline','textfield','textline'));
  }
  sub initialize_inputtags {
-   @Apache::inputtags::input=();
+     # list of current input ids
-   @Apache::inputtags::inputlist=();
+     @Apache::inputtags::input=();
-   @Apache::inputtags::response=();
+     # list of all input ids seen in this problem
-   @Apache::inputtags::responselist=();
+     @Apache::inputtags::inputlist=();
-   @Apache::inputtags::answergroup=();
+     # list of all current response ids
-   $Apache::inputtags::part='';
+     @Apache::inputtags::response=();
-   @Apache::inputtags::status=();
+     # list of all response ids seen in this problem
-   %Apache::inputtags::params=();
+     @Apache::inputtags::responselist=();
+     # list of whether or not a specific response was previously used
+     @Apache::inputtags::previous=();
+     # submission it was used in
+     @Apache::inputtags::previous_version=();
+     # id of current part, 0 means that no part is current
+     # (inside <problem> only
+     $Apache::inputtags::part='';
+     # list of all part ids seen
+     @Apache::inputtags::partlist=();
+     # list of problem date statuses, the first element is for <problem>
+     # if there is a second element it is for the current <part>
+     @Apache::inputtags::status=();
+     # hash of defined params for the current response
+     %Apache::inputtags::params=();
+     # list of all ids, for <import>, these get join()ed and prepended
+     @Apache::inputtags::import=();
+     # list of all import ids seen
+     @Apache::inputtags::importlist=();
+     # just used to note whether we have seen a response that isn't in a part
+     $Apache::inputtags::response_with_no_part=0;
+     # storage location so the begin <*response> tag can generate the correct
+     # answer string for display by the <textline />
+     %Apache::inputtags::answertxt=();
+ }
+ sub check_for_duplicate_ids {
+     my %check;
+     foreach my $id (@Apache::inputtags::partlist,
+ 		    @Apache::inputtags::responselist,
+ 		    @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 {
-   my ($parstack,$safeeval)=@_;
+     my ($parstack,$safeeval)=@_;
-   my $args ='';
+     my $id = &Apache::lonxml::get_param('id',$parstack,$safeeval);
-   if ( $#$parstack > -1 ) { $args=$$parstack[$#$parstack]; }
+     if ($id eq '') { $id = $Apache::lonxml::curdepth; }
-   my $id = &Apache::run::run("{$args;".'return $id}',$safeeval);
+     push (@Apache::inputtags::input,$id);
-   push (@Apache::inputtags::input,$id);
+     push (@Apache::inputtags::inputlist,$id);
-   push (@Apache::inputtags::inputlist,$id);
+     return $id;
-   return $id;
  }
  sub end_input {
-   pop @Apache::inputtags::input;
+     pop @Apache::inputtags::input;
-   return '';
+     return '';
  }
- sub start_textarea {
+ sub addchars {
-   my ($target,$token,$parstack,$parser,$safeeval)=@_;
+     my ($fieldid,$addchars)=@_;
-   my $result = "";
+     my $output='';
-   my $id = &start_input($parstack,$safeeval);
+     foreach (split(/\,/,$addchars)) {
-   if ($target eq 'web') {
+ 	$output.='<a href="javascript:void(document.forms.lonhomework.'.
-     $result= '<textarea name="HWVAL'.$id.'" value="">';
+ 	    $fieldid.'.value+=\''.$_.'\')">'.$_.'</a> ';
-   }
+     }
-   return $result;
+     return $output;
  }
- sub end_textarea {
+ sub start_textfield {
-   my ($target,$token,$parstack,$parser,$safeeval)=@_;
+     my ($target,$token,$tagstack,$parstack,$parser,$safeeval)=@_;
-   if ($target eq 'web') {
+     my $result = "";
-     return "</textarea>";
+     my $id = &start_input($parstack,$safeeval);
-   }
+     my $resid=$Apache::inputtags::response[-1];
-   &end_input;
+     if ($target eq 'web') {
-   return '';
+ 	$Apache::lonxml::evaluate--;
+ 	if ($Apache::inputtags::status[-1] eq 'CAN_ANSWER') {
+ 	    my $partid=$Apache::inputtags::part;
+ 	    my $oldresponse = &HTML::Entities::encode($Apache::lonhomework::history{"resource.$partid.$resid.submission"},'<>&"');
+ 	    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);
+ 	    }
+ 	    push @Apache::lonxml::htmlareafields,'HWVAL_'.$resid;
+ 	    $result.= '<textarea wrap="hard" name="HWVAL_'.$resid.'" id="HWVAL_'.$resid.'" '.
+ 		"rows=\"$rows\" cols=\"$cols\">".$oldresponse;
+ 	    if ($oldresponse ne '') {
+ 		#get rid of any startup text if the user has already responded
+ 		&Apache::lonxml::get_all_text("/textfield",$parser);
+ 	    }
+ 	} else {
+ 	    #right or wrong don't show it
+ 	    #$result='<table border="1"><tr><td><i>'.$oldresponse.'</i></td></tr></table>';
+ 	    $result='';
+ 	    #get rid of any startup text
+ 	    &Apache::lonxml::get_all_text("/textfield",$parser);
+ 	}
+     } elsif ($target eq 'grade') {
+ 	my $seedtext=&Apache::lonxml::get_all_text("/textfield",$parser);
+ 	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);
+ 	$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 $result;
  }
  sub start_textline {
-   my ($target,$token,$parstack,$parser,$safeeval)=@_;
+     my ($target,$token,$tagstack,$parstack,$parser,$safeeval)=@_;
-   my $result = "";
+     my $result = "";
-   if ($target eq 'web') {
+     if ($target eq 'web') {
-     my $args ='';
+ 	$Apache::lonxml::evaluate--;
-     if ( $#$parstack > -1 ) { $args=$$parstack[$#$parstack]; }
+ 	my $partid=$Apache::inputtags::part;
-     my $size = &Apache::run::run("{$args;".'return $size}',$safeeval);
+ 	my $id=$Apache::inputtags::response[-1];
-     if ($size eq '') { $size=20; }
+ 	if ($Apache::inputtags::status[-1] eq 'CAN_ANSWER') {
-     my $oldresponse = $Apache::lonhomework::history{"resource.$Apache::inputtags::part.$Apache::inputtags::response['-1'].submission"};
+ 	    my $size = &Apache::lonxml::get_param('size',$parstack,$safeeval);
-     $result= '<input type="text" name="HWVAL'.$Apache::inputtags::response['-1'].'" value="'.$oldresponse.'" size="'.$size.'">';
+ 	    my $maxlength;
-   }
+ 	    if ($size eq '') { $size=20; } else {
-   return $result;
+ 		if ($size < 20) { $maxlength=$size; }
+ 	    }
+ 	    my $oldresponse = &HTML::Entities::encode($Apache::lonhomework::history{"resource.$partid.$id.submission"},'<>&"');
+ 	    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') {
+ 		    $readonly=' readonly="readonly" ';
+ 		} else {
+ 		    $readonly='';
+ 		}
+ 		$result.= '<input type="text" '.$readonly.' name="HWVAL_'.$id.'" value="'.
+ 		    $oldresponse.'" size="'.$size.'" maxlength="'.$maxlength.'" />';
+ 	    }
+ 	} else {
+ 	    #right or wrong don't show what was last typed in.
+ 	    $result='<i>'.$Apache::inputtags::answertxt{$id}.'</i>';
+ 	    #$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' and $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';}
+ 	$result='\framebox['.$size.'][s]{\tiny\strut}';
+     }
+     return $result;
  }
  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'); }
+     return "";
+ }
+ sub start_hiddenline {
+     my ($target,$token,$tagstack,$parstack,$parser,$safeeval)=@_;
+     my $result = "";
+     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];
+ 	    my $oldresponse = &HTML::Entities::encode($Apache::lonhomework::history{"resource.$partid.$id.submission"},'<>&"');
+ 	    if ($Apache::lonhomework::type ne 'exam') {
+ 		$result= '<input type="hidden" name="HWVAL_'.$id.'" value="'.
+ 		    $oldresponse.'" />';
+ 	    }
+ 	}
+     } elsif ($target eq 'edit') {
+ 	$result=&Apache::edit::tag_start($target,$token);
+ 	$result.=&Apache::edit::end_table;
+     }
+     return $result;
  }
- #answergroup is deprecated
+ sub end_hiddenline {
- #sub start_answergroup {
+     my ($target,$token,$tagstack,$parstack,$parser,$safeeval)=@_;
- #  my ($target,$token,$parstack,$parser,$safeeval)=@_;
+     if    ($target eq 'web') { $Apache::lonxml::evaluate++; }
- #  my $args ='';
+     elsif ($target eq 'edit') { return ('','no'); }
- #  if ( $#$parstack > -1 ) { $args=$$parstack[$#$parstack]; }
+     return "";
- #  my $id = &Apache::run::run("{$args;".'return $id}',$safeeval);
+ }
- #  push (@Apache::inputtags::answergroup,$id);
- #  if ($target == 'web') {
+ # $part -> partid
- #
+ # $id -> responseid
- #  }
+ # $uploadefiletypes -> comma seperated list of extensions allowed or * for any
- #  return '';
+ # $which -> 'uploadedonly'  -> only newly uploaded files
- #}
+ #           'portfolioonly' -> only allow files from portfolio
- #
+ #           'both' -> allow files from either location
- #sub end_answergroup {
+ # returns a table row <tr>
- #  my ($target,$token,$parstack,$parser,$safeeval)=@_;
+ sub file_selector {
- #  return ''; # <answergroup> has ben deprecated
+     my ($part,$id,$uploadedfiletypes,$which)=@_;
- #  my $args ='';
+     if (!$uploadedfiletypes) { return ''; }
- #  if ( $#$parstack > -1 ) { $args=$$parstack[$#$parstack]; }
+     my $result;
- #  my $id = &Apache::run::run("{$args;".'return $id}',$safeeval);
- #  push (@Apache::inputtags::answergroup,$id);
+     $result.='<tr><td>'.
- #  my $result='';
+ 	&mt('Allowed filetypes: <b>[_1]</b>',$uploadedfiletypes).'<br />';
- #  my $button='<input type="submit" name="submit" value="Submit All Answers">';
+     if ($which eq 'uploadonly' || $which eq 'both') {
- #  my $showbutton='1';
+ 	$result.=&mt('Submit a file: (only one file can be uploaded)').
- #  my $usedtry='1';
+ 	    ' <br /><input type="file" size="50" name="HWFILE'.
- #  my $response='';
+ 	    $part.'_'.$id.'" /><br />';
- #  if ( $target == 'web' ) {
+ 	my $uploadedfile= &HTML::Entities::encode($Apache::lonhomework::history{"resource.$part.$id.uploadedfile"},'<>&"');
- #    if ( defined $ENV{'form.submit'}) {
- #    }
+ 	if ($uploadedfile) {
- #    if ($showbutton > 0) { $result.=$button }
+ 	    my $url=$Apache::lonhomework::history{"resource.$part.$id.uploadedurl"};
- #  }
+ 	    push (@Apache::lonxml::extlinks,$url);
- #  pop @Apache::inputtags::answergroup;
+ 	    &Apache::lonnet::allowuploaded('/adm/essayresponse',$url);
- #  return $result;
+ 	    my $icon=&Apache::loncommon::icon($url);
- #}
+ 	    my $curfile='<a href="'.$url.'"><img src="'.$icon.
+ 		'" border="0" />'.$uploadedfile.'</a>';
+ 	    $result.=&mt('Currently submitted: <tt>[_1]</tt>',$curfile);
- sub start_datasubmission {
+ 	} else {
- }
+ 	    #$result.=&mt('(Hand in a file you have prepared on your computer)');
+ 	}
- sub end_datasubmission {
+     }
-   my ($target,$token,$parstack,$parser,$safeeval)=@_;
+     if ( $which eq 'both') {
-   if ( $target == 'web' ) {
+ 	$result.='<br />'.'<strong>'.&mt('OR:').'</strong><br />';
-     return '<input type="submit" name="submit" value="Submit All Data">';
+     }
-   }
+     if ($which eq 'portfolioonly' || $which eq 'both') {
-   return '';
+ 	$result.='<a href='."'".'javascript:void(window.open("/adm/portfolio?mode=selectfile&amp;fieldname=HWPORT'.$part.'_'.$id.'","cat","height=600,width=800,scrollbars=1,resizable=1,menubar=2,location=1"))'."'".'>'.
+ 	    &mt('Select Portfolio Files').'</a><br />'.
+ 	    '<input type="text" size="50" name="HWPORT'.$part.'_'.$id.'" value="" />'.
+ 	    '<br />';
+ 	if ($Apache::lonhomework::history{"resource.$part.$id.portfiles"}=~/[^\s]/){
+ 	    my $filelist;
+ 	    foreach my $file (split(',',&Apache::lonnet::unescape($Apache::lonhomework::history{"resource.$part.$id.portfiles"}))) {
+ 		my (undef,undef,$domain,$user)=&Apache::lonxml::whichuser();
+ 		my $url="/uploaded/$domain/$user/portfolio$file";
+ 		my $icon=&Apache::loncommon::icon($url);
+ 		$filelist.='<a href="'.$url.'"><img src="'.$icon.
+ 		    '" border="0" />'.$file.'</a>';
+ 	    }
+ 	    $result.=&mt("Portfolio files previously selected: <strong>[_1]</strong>",$filelist);
+ 	}
+     }
+     $result.='</td></tr>';
+     return $result;
+ }
+ sub checkstatus {
+     my ($value,$awardref,$msgref)=@_;
+     for (my $i=0;$i<=$#$awardref;$i++) {
+ 	if ($$awardref[$i] eq $value) {
+ 	    return ($$awardref[$i],$$msgref[$i]);
+ 	}
+     }
+     return(undef,undef);
  }
  sub finalizeawards {
-   my $result='';
+     my ($awardref,$msgref)=@_;
-   my $award;
+     my $result=undef;
-   if ($#_ == '-1') { $result = "NO_RESPONSE"; }
+     my $award;
-   if ($result eq '' ) {
+     my $msg;
-     foreach $award (@_) { if ($award eq '') {$result='MISSING_ANSWER'; last;}}
+     if ($#$awardref == -1) { $result = "NO_RESPONSE"; }
-   }
+     if ($result eq '' ) {
-   if ($result eq '' ) {
+ 	my $blankcount;
-     foreach $award (@_) { if ($award eq 'ERROR') {$result='ERROR'; last;}}
+ 	foreach $award (@$awardref) {
-   }
+ 	    if ($award eq '') {
+ 		$result='MISSING_ANSWER';
-   if ($result eq '' ) {
+ 		$blankcount++;
-     foreach $award (@_) {
+ 	    }
-       if ($award eq 'UNIT_FAIL' ||
+ 	}
- 	  $award eq 'NO_UNIT' ||
+ 	if ($blankcount == ($#$awardref + 1)) { $result = 'NO_RESPONSE'; }
- 	  $award eq 'UNIT_NOTNEEDED') {
+     }
- 	$result=$award; last;
+     if (defined($result)) { return ($result,$msg); }
-       }
+     foreach my $possibleaward ('MISSING_ANSWER', 'ERROR', 'NO_RESPONSE',
-     }
+ 			       'TOO_LONG', 'UNIT_INVALID_INSTRUCTOR',
-   }
+ 			       'UNIT_INVALID_STUDENT', 'UNIT_IRRECONCIBLE',
-   if ($result eq '' ) {
+ 			       'UNIT_FAIL', 'NO_UNIT',
-     foreach $award (@_) {
+ 			       'UNIT_NOTNEEDED', 'WANTED_NUMERIC',
-       if ($award eq 'WANTED_NUMERIC' ||
+ 			       'BAD_FORMULA', 'SIG_FAIL', 'INCORRECT',
- 	  $award eq 'BAD_FORMULA') {$result=$award; last;}
+ 			       'MISORDERED_RANK', 'INVALID_FILETYPE',
-     }
+ 			       'DRAFT', 'SUBMITTED', 'ASSIGNED_SCORE',
-   }
+ 			       'APPROX_ANS', 'EXACT_ANS','COMMA_FAIL') {
-   if ($result eq '' ) {
+ 	($result,$msg)=&checkstatus($possibleaward,$awardref,$msgref);
-     foreach $award (@_) { if ($award eq 'SIG_FAIL') {$result=$award; last;} }
+ 	if (defined($result)) { return ($result,$msg); }
-   }
+     }
-   if ($result eq '' ) {
+     return ('ERROR',undef);
-     foreach $award (@_) { if ($award eq 'INCORRECT') {$result=$award; last;} }
-   }
-   if ($result eq '' ) {
-     foreach $award (@_) { if ($award eq 'APPROX_ANS') {$result=$award; last;} }
-   }
-   if ($result eq '' ) { $result='EXACT_ANS'; }
-   return $result
  }
  sub decideoutput {
-   my ($award)=@_;
+     my ($award,$awardmsg,$solved,$previous,$target)=@_;
-   my $message='';
+     my $message='';
-   my $button=0;
+     my $button=0;
-   if      ($award eq 'EXACT_ANS' || $award eq 'APPROX_ANS' ) {
+     my $previousmsg;
-     $message = "Correct computer gets %s";
+     my $bgcolor='orange';
-     $button=0;
+     my $added_computer_text=0;
-   } elsif ($award eq 'NO_RESPONSE') {
+     my %possiblecolors =
-     $message = '';
+ 	( 'correct' => '#aaffaa',
-     $button=1;
+ 	  'charged_try' => '#ffaaaa',
-   } elsif ($award eq 'MISSING_ANSWER') {
+ 	  'not_charged_try' => '#ffffaa',
-     $message = 'Some parts were not submitted';
+ 	  'no_message' => '#fffff',
-     $button = 1;
+ 	  );
-   } elsif ($award eq 'WANTED_NUMERIC') {
+     if ($previous) { $previousmsg=&mt('You have entered that answer before'); }
-     $message = "This question expects a numeric answer";
-     $button=1;
+     if      ($solved =~ /^correct/) {
-   } elsif ($award eq 'SIG_FAIL') {
+ 	if ($award eq 'ASSIGNED_SCORE') {
-     $message = "Please adjust significant figures, you provided %s significant figures";
+ 	    $message = &mt("A score has been assigned.");
-     $button=1;
+ 	} else {
-   } elsif ($award eq 'UNIT_FAIL') {
+ 	    if ($target eq 'tex') {
-     $message = "Units incorrect, Computer reads units as %s";
+ 		$message = '\textbf{'.&mt('You are correct.').'}';
-     $button=1;
+ 	    } else {
-   } elsif ($award eq 'UNIT_NOTNEEDED') {
+ 		$message = "<b>".&mt('You are correct.')."</b>";
-     $message = "Only a number required, Computer reads units of %s";
+ 		$message.=" ".&mt("Computer's answer now shown above.");
-     $button=1;
+ 	    }
-   } elsif ($award eq 'NO_UNIT') {
+ 	    $added_computer_text=1;
-     $message = "Units required";
+ 	    unless ($ENV{'course.'.
-     $button=1;
+ 			     $ENV{'request.course.id'}.
-   } elsif ($award eq 'BAD_FORMULA') {
+ 			     '.disable_receipt_display'} eq 'yes') {
-     $message = "Unable to understand formula";
+ 		$message.=(($target eq 'web')?'<br />':' ').
-     $button=1;
+ 		    &mt('Your receipt is').' '.&Apache::lonnet::receipt($Apache::inputtags::part).
-   } elsif ($award eq 'INCORRECT') {
+ 		    (($target eq 'web')?&Apache::loncommon::help_open_topic('Receipt'):'');
-     $message = "Incorrect";
+ 	    }
-     $button=1;
+ 	}
-   } else {
+ 	$bgcolor=$possiblecolors{'correct'};
-     $message = "Unknown message: $award";
+ 	$button=0;
-     $button=1;
+ 	$previousmsg='';
-   }
+     } elsif ($solved =~ /^excused/) {
-   return ($button,$message);
+ 	if ($target eq 'tex') {
+ 	    $message = ' \textbf{'.&mt('You are excused from the problem.').'} ';
+ 	} else {
+ 	    $message = "<b>".&mt('You are excused from the problem.')."</b>";
+ 	}
+ 	$bgcolor=$possiblecolors{'charged_try'};
+ 	$button=0;
+ 	$previousmsg='';
+     } elsif ($award eq 'EXACT_ANS' || $award eq 'APPROX_ANS' ) {
+ 	if ($solved =~ /^incorrect/ || $solved eq '') {
+ 	    $message = &mt("Incorrect").".";
+ 	    $bgcolor=$possiblecolors{'charged_try'};
+ 	    $button=1;
+ 	} else {
+ 	    if ($target eq 'tex') {
+ 		$message = '\textbf{'.&mt('You are correct.').'}';
+ 	    } else {
+ 		$message = "<b>".&mt('You are correct.')."</b>";
+ 		$message.=" ".&mt("Computer's answer now shown above.");
+ 	    }
+ 	    $added_computer_text=1;
+ 	    unless ($ENV{'course.'.
+ 			     $ENV{'request.course.id'}.
+ 			     '.disable_receipt_display'} eq 'yes') {
+ 		$message.=(($target eq 'web')?'<br />':' ').
+ 		    'Your receipt is '.&Apache::lonnet::receipt($Apache::inputtags::part).
+ 		    (($target eq 'web')?&Apache::loncommon::help_open_topic('Receipt'):'');
+ 	    }
+ 	    $bgcolor=$possiblecolors{'correct'};
+ 	    $button=0;
+ 	    $previousmsg='';
+ 	}
+     } elsif ($award eq 'NO_RESPONSE') {
+ 	$message = '';
+ 	$bgcolor=$possiblecolors{'no_feedback'};
+ 	$button=1;
+     } elsif ($award eq 'MISSING_ANSWER') {
+ 	$message = &mt('Some items were not submitted.');
+ 	$bgcolor=$possiblecolors{'not_charged_try'};
+ 	$button = 1;
+     } elsif ($award eq 'ERROR') {
+ 	$message = &mt('An error occured while grading your answer.');
+ 	$bgcolor=$possiblecolors{'not_charged_try'};
+ 	$button = 1;
+     } elsif ($award eq 'TOO_LONG') {
+ 	$message = &mt("The submitted answer was too long.");
+ 	$bgcolor=$possiblecolors{'not_charged_try'};
+ 	$button=1;
+     } elsif ($award eq 'WANTED_NUMERIC') {
+ 	$message = &mt("This question expects a numeric answer.");
+ 	$bgcolor=$possiblecolors{'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').' '.&Apache::loncommon::help_open_topic('Ranking_Problems','help on ranking problems');
+ 	}
+ 	$bgcolor=$possiblecolors{'not_charged_try'};
+ 	$button=1;
+     } elsif ($award eq 'INVALID_FILETYPE') {
+ 	$message = &mt('The filetype extension of the file you uploaded is not allowed.');
+ 	$bgcolor=$possiblecolors{'not_charged_try'};
+ 	$button=1;
+     } elsif ($award eq 'SIG_FAIL') {
+ 	my ($used,$min,$max)=split(':',$awardmsg);
+ 	my $word;
+ 	if ($used < $min) { $word=&mt('more'); }
+ 	if ($used > $max) { $word=&mt('fewer'); }
+ 	$message = &mt("Submission not graded.  Use [_2] digits.",$used,$word);
+ 	$bgcolor=$possiblecolors{'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');}
+ 	$bgcolor=$possiblecolors{'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');}
+ 	$bgcolor=$possiblecolors{'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');}
+ 	$bgcolor=$possiblecolors{'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));
+ 	$bgcolor=$possiblecolors{'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')};
+ 	$bgcolor=$possiblecolors{'not_charged_try'};
+ 	$button=1;
+     } elsif ($award eq 'COMMA_FAIL') {
+ 	$message = &mt("Proper comma separation is required").'.';
+ 	$bgcolor=$possiblecolors{'not_charged_try'};
+ 	$button=1;
+     } elsif ($award eq 'BAD_FORMULA') {
+ 	$message = &mt("Unable to understand formula");
+ 	$bgcolor=$possiblecolors{'not_charged_try'};
+ 	$button=1;
+     } elsif ($award eq 'INCORRECT') {
+ 	$message = &mt("Incorrect").'.';
+ 	$bgcolor=$possiblecolors{'charged_try'};
+ 	$button=1;
+     } elsif ($award eq 'SUBMITTED') {
+ 	$message = &mt("Your submission has been recorded.");
+ 	$bgcolor=$possiblecolors{'correct'};
+ 	$button=1;
+     } elsif ($award eq 'DRAFT') {
+ 	$message = &mt("A draft copy has been saved.");
+ 	$bgcolor=$possiblecolors{'not_charged_try'};
+ 	$button=1;
+     } elsif ($award eq 'ASSIGNED_SCORE') {
+ 	$message = &mt("A score has been assigned.");
+ 	$bgcolor=$possiblecolors{'correct'};
+ 	$button=0;
+     } elsif ($award eq '') {
+ 	$bgcolor=$possiblecolors{'not_charged_try'};
+ 	$button=1;
+     } else {
+ 	$message = &mt("Unknown message").": $award";
+ 	$button=1;
+     }
+     if (lc($Apache::lonhomework::problemstatus) eq 'no'  &&
+ 	$Apache::inputtags::status[-1] ne 'SHOW_ANSWER') {
+ 	$message = &mt("Answer Submitted: Your final submission will be graded after the due date.");
+ 	$bgcolor=$possiblecolors{'correct'};
+ 	$button=1;
+     }
+     if ($Apache::inputtags::status[-1] eq 'SHOW_ANSWER' &&
+ 	!$added_computer_text && $target ne 'tex') {
+ 	$message.=" ".&mt("Computer's answer now shown above.");
+ 	$added_computer_text=1;
+     }
+     return ($button,$bgcolor,$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 {
-   my ($award,$id) = @_;
+     my ($award,$msg,$id,$previously_used) = @_;
-   if ( $award eq 'APPROX_ANS' || $award eq 'EXACT_ANS' ) {
+     if ($Apache::lonhomework::scantronmode &&
-     $Apache::lonhomework::results{"resource.$id.tries"} =
+ 	&Apache::lonnet::validCODE($ENV{'form.CODE'})) {
-       $Apache::lonhomework::history{"resource.$id.tries"} + 1;
+ 	$Apache::lonhomework::results{"resource.CODE"}=$ENV{'form.CODE'};
-     $Apache::lonhomework::results{"resource.$id.solved"} =
+     } elsif ($Apache::lonhomework::scantronmode &&
-       'correct_by_student';
+ 	     $ENV{'form.CODE'} eq '' &&
-     $Apache::lonhomework::results{"resource.$id.awarded"} = '1';
+ 	     $Apache::lonhomework::history{"resource.CODE"} ne '') {
-   } elsif ( $award eq 'INCORRECT' ) {
+ 	$Apache::lonhomework::results{"resource.CODE"}='';
-     $Apache::lonhomework::results{"resource.$id.tries"} =
+     }
-       $Apache::lonhomework::history{"resource.$id.tries"} + 1;
-     $Apache::lonhomework::results{"resource.$id.solved"} =
+     if (!$Apache::lonhomework::scantronmode &&
-       'incorrect_attempted';
+ 	$Apache::inputtags::status['-1'] ne 'CAN_ANSWER' &&
-   } else {
+ 	$Apache::inputtags::status['-1'] ne 'CANNOT_ANSWER') {
-     $Apache::lonhomework::results{"resource.$id.solved"} =
+ 	$Apache::lonhomework::results{"resource.$id.afterduedate"}=$award;
-       'incorrect_attempted';
+ 	return '';
-   }
+     } elsif ( $Apache::lonhomework::history{"resource.$id.solved"} !~
-   $Apache::lonhomework::results{"resource.$id.award"} = $award;
+ 	      /^correct/ || $Apache::lonhomework::scantronmode ||
+ 	      lc($Apache::lonhomework::problemstatus) eq 'no') {
+         # 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) {
+ 		$Apache::lonhomework::results{"resource.$id.awarded"}+=
+ 		    $Apache::lonhomework::results{"resource.$id.$res.awarded"};
+ 	    }
+ 	    if ($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 'INCORRECT' ) {
+ 	    $Apache::lonhomework::results{"resource.$id.tries"} =
+ 		$Apache::lonhomework::history{"resource.$id.tries"} + 1;
+ 	    if (lc($Apache::lonhomework::problemstatus) eq 'no' ||
+ 		$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 '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 (lc($Apache::lonhomework::problemstatus) eq 'no' ||
+ 		$Apache::lonhomework::scantronmode) {
+ 		$Apache::lonhomework::results{"resource.$id.tries"} =
+ 		    $Apache::lonhomework::history{"resource.$id.tries"} + 1;
+ 		$Apache::lonhomework::results{"resource.$id.awarded"} = 0;
+ 	    }
+ 	}
+ 	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 ( $previously_used eq 'PREVIOUSLY_USED') {
+ 		if (lc($Apache::lonhomework::problemstatus) ne 'no') {
+ 		    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.solved"} =~
+ 	      /^correct/ ) {
+ 	#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"} = $award;
  }
  sub grade {
-   my ($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 $id");
- 	&Apache::lonxml::debug("looking for response.$id.$response.awarddetail");
+ 	    push (@awards,$value);
- 	my $value=$Apache::lonhomework::results{"resource.$id.$response.awarddetail"};
+ 	    $value=$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) = &finalizeawards(\@awards,\@msgs);
- 	  &Apache::lonxml::debug("skipping $value from $response for $id");
+ 	my $previously_used;
- 	}
+ 	if ( $#Apache::inputtags::previous eq $#awards ) {
-       }
+ 	    my $match=0;
-       my $finalaward = &finalizeawards(@awards);
+ 	    my @matches;
-       &Apache::lonxml::debug("final award $finalaward");
+ 	    foreach my $versionar (@Apache::inputtags::previous_version) {
-       &setgradedata($finalaward,$id);
+ 		foreach my $version (@$versionar) {
+ 		    $matches[$version]++;
+ 		}
+ 	    }
+ 	    foreach my $elem (@matches) {if ($elem eq ($#awards+1)) {$match=1;}}
+ 	    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 '';
-   return $result;
  }
  sub gradestatus {
-   my ($id) = @_;
+     my ($id,$target) = @_;
-   my $showbutton = 1;
+     my $showbutton = 1;
-   my $message = '';
+     my $bgcolor = '';
-   my $trystr='';
+     my $message = '';
-   my $button='';
+     my $latemessage = '';
+     my $trystr='';
-   my $status = $Apache::lonhomework::part['-1'];
+     my $button='';
+     my $previousmsg='';
-   if ( $status eq 'CAN_ANSWER' || $status eq 'SHOW_ANSWER' ) {
-     my $award = $Apache::lonhomework::history{"resource.$id.award"};
+     my $status = $Apache::inputtags::status['-1'];
-     &Apache::lonxml::debug("Found Award |$award|");
+     &Apache::lonxml::debug("gradestatus has :$status:");
-     if ( $award ne '' ) {
+     if ( $status ne 'CLOSED' && $status ne 'UNAVAILABLE' &&
-       &Apache::lonxml::debug('Getting message');
+ 	 $status ne 'INVALID_ACCESS') {
-       ($showbutton,$message) = &decideoutput($award);
+ 	my $award = $Apache::lonhomework::history{"resource.$id.award"};
-     }
+ 	my $solved = $Apache::lonhomework::history{"resource.$id.solved"};
-     my $tries = $Apache::lonhomework::history{"resource.$id.tries"};
+ 	my $previous = $Apache::lonhomework::history{"resource.$id.previous"};
-     my $maxtries = &Apache::lonnet::EXT("resource.$id.maxtries");
+ 	my $awardmsg = $Apache::lonhomework::history{"resource.$id.awardmsg"};
-     &Apache::lonxml::debug("got maxtries of :$maxtries:");
+ 	&Apache::lonxml::debug("Found Award |$award|$solved|$awardmsg");
-     if ( $tries eq '' ) { $tries = '0'; }
+ 	if ( $award ne '' || $solved ne '' || $status eq 'SHOW_ANSWER') {
-     if ( $maxtries eq '' ) { $maxtries = '2'; }
+ 	    &Apache::lonxml::debug('Getting message');
-     if ( $showbutton ) {
+ 	    ($showbutton,$bgcolor,$message,$previousmsg) =
-       $trystr = "<br></br>Tries $tries/$maxtries";
+ 		&decideoutput($award,$awardmsg,$solved,$previous,$target);
-     }
+ 	    if ($target eq 'tex') {
-     if ( $tries >= $maxtries ) { $showbutton = 0; }
+ 		$message='\vskip 2 mm '.$message.' ';
-     if ( $status eq 'SHOW_ANSWER' ) { $showbutton = 0; }
+ 	    } else {
-     if ( $showbutton ) {
+ 		$message="<td bgcolor=\"$bgcolor\">$message</td>";
-       $button = '<input type="submit" name="submit" value="Submit All Answers"><br></br>';
+ 		if ($previousmsg) {
+ 		    $previousmsg="<td bgcolor=\"#aaaaff\">$previousmsg</td>";
+ 		}
+ 	    }
+ 	}
+ 	my $tries = $Apache::lonhomework::history{"resource.$id.tries"};
+ 	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=&mt('Tries');
+ 	if ( $Apache::lonhomework::type eq 'survey') { $tries_text=&mt('Submissions'); }
+ 	if ( $showbutton ) {
+ 	    if ($target eq 'tex') {
+ 		if ($ENV{'request.state'} ne "construct" && $Apache::lonhomework::type ne 'exam' && $ENV{'form.suppress_tries'} ne 'yes') {
+ 		    $trystr = ' {\vskip 1 mm \small \textit{'.$tries_text.'} '.$tries.'/'.$maxtries.'} \vskip 2 mm ';
+ 		} else {
+ 		    $trystr = '\vskip 0 mm ';
+ 		}
+ 	    } else {
+ 		$trystr = "<td><nobr>".$tries_text." $tries";
+ 		if($ENV{'request.state'} ne 'construct') {
+ 		    $trystr.="/$maxtries";
+ 		} else {
+ 		    if (defined($Apache::inputtags::params{'maxtries'})) {
+ 			$trystr.="/".$Apache::inputtags::params{'maxtries'};
+ 		    }
+ 		}
+ 		$trystr.="</nobr></td>";
+ 	    }
+ 	}
+ 	if ( $status eq 'SHOW_ANSWER' || $status eq 'CANNOT_ANSWER') {$showbutton = 0;}
+ 	if ( $showbutton ) {
+ 	    if ($target ne 'tex') {
+ 		$button = '<input type="submit" name="submit_'.$id.'" value="'.&mt('Submit Answer').'" />';
+ 	    }
+ 	}
+ 	if ($Apache::lonhomework::history{"resource.$id.afterduedate"}) {
+ 	    #last submissions was after due date
+ 	    if ($target eq 'tex') {
+ 		$latemessage=' The last submission was after the Due Date ';
+ 	    } else {
+ 		$latemessage="<td bgcolor=\"#ffaaaa\">The last submission was after the Due Date</td>";
+ 	    }
+ 	}
+     }
+     my $output= $previousmsg.$latemessage.$message.$trystr;
+     if ($output =~ /^\s*$/) {
+ 	return $button;
+     } else {
+ 	if ($target eq 'tex') {
+ 	    return $button.' \vskip 0 mm '.$output.' ';
+ 	} else {
+ 	    return '<table><tr><td>'.$button.'</td>'.$output.'</tr></table>';
+ 	}
      }
-   }
-   return $button.$message.$trystr;
  }
 ;
  __END__

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Removed from v.1.18
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	Added in v.1.160