Annotation of loncom/homework/inputtags.pm, revision 1.307

1.43      albertel    1: # The LearningOnline Network with CAPA
                      2: # input  definitons
1.47      albertel    3: #
1.307   ! raeburn     4: # $Id: inputtags.pm,v 1.306 2012/08/21 18:20:38 raeburn Exp $
1.47      albertel    5: #
                      6: # Copyright Michigan State University Board of Trustees
                      7: #
                      8: # This file is part of the LearningOnline Network with CAPA (LON-CAPA).
                      9: #
                     10: # LON-CAPA is free software; you can redistribute it and/or modify
                     11: # it under the terms of the GNU General Public License as published by
                     12: # the Free Software Foundation; either version 2 of the License, or
                     13: # (at your option) any later version.
                     14: #
                     15: # LON-CAPA is distributed in the hope that it will be useful,
                     16: # but WITHOUT ANY WARRANTY; without even the implied warranty of
                     17: # MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
                     18: # GNU General Public License for more details.
                     19: #
                     20: # You should have received a copy of the GNU General Public License
                     21: # along with LON-CAPA; if not, write to the Free Software
                     22: # Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA  02111-1307  USA
                     23: #
                     24: # /home/httpd/html/adm/gpl.txt
                     25: #
                     26: # http://www.lon-capa.org/
1.1       albertel   27: 
1.249     jms        28: =pod
                     29: 
                     30: =head1 NAME
                     31: 
                     32: Apache::inputtags
                     33: 
                     34: =head1 SYNOPSIS
                     35: 
                     36: 
                     37: 
                     38: This is part of the LearningOnline Network with CAPA project
                     39: described at http://www.lon-capa.org.
                     40: 
                     41: 
                     42: =head1 NOTABLE SUBROUTINES
                     43: 
                     44: =over
                     45: 
                     46: =item 
                     47: 
                     48: =back
                     49: 
                     50: =cut
                     51: 
1.1       albertel   52: package Apache::inputtags;
1.55      albertel   53: use HTML::Entities();
1.1       albertel   54: use strict;
1.82      www        55: use Apache::loncommon;
1.265     raeburn    56: use Apache::lonhtmlcommon;
1.115     www        57: use Apache::lonlocal;
1.165     albertel   58: use Apache::lonnet;
1.192     www        59: use LONCAPA;
                     60:  
1.1       albertel   61: 
1.50      harris41   62: BEGIN {
1.286     www        63:     &Apache::lonxml::register('Apache::inputtags',('hiddensubmission','hiddenline','textfield','textline'));
1.1       albertel   64: }
                     65: 
1.249     jms        66: =pod
                     67: 
                     68: =item initialize_inputtags()
                     69: 
                     70: Initializes a set of global variables used during the parse of the problem.
                     71: 
                     72: @Apache::inputtags::input        - List of current input ids.
                     73: @Apache::inputtags::inputlist    - List of all input ids seen this problem.
                     74: @Apache::inputtags::response     - List of all current resopnse ids.
                     75: @Apache::inputtags::responselist - List of all response ids seen this 
                     76:                                      problem.
                     77: @Apache::inputtags::hint         - List of all hint ids.
                     78: @Apache::inputtags::hintlist     - List of all hint ids seen this problem.
                     79: @Apache::inputtags::previous     - List describing if specific responseds
                     80:                                      have been used
                     81: @Apache::inputtags::previous_version - Submission responses were used in.
                     82: $Apache::inputtags::part         - Current part id (valid only in 
                     83:                                      <problem>)
                     84:                                    0 if not in a part.
                     85: @Apache::inputtags::partlist     - List of part ids seen in the current
                     86:                                      <problem>
                     87: @Apache::inputtags::status       - List of problem  statuses. First 
                     88:                                    element is the status of the <problem>
                     89:                                    the remainder are for individual <part>s.
                     90: %Apache::inputtags::params       - Hash of defined parameters for the
                     91:                                    current response.
                     92: @Apache::inputtags::import       - List of all ids for <import> thes get
                     93:                                    join()ed and prepended.
                     94: @Apache::inputtags::importlist   - List of all import ids seen.
                     95: $Apache::inputtags::response_with_no_part
                     96:                                  - Flag set true if we have seen a response
                     97:                                    that is not inside a <part>
                     98: %Apache::inputtags::answertxt    - <*response> tags store correct
                     99:                                    answer strings for display by <textline/>
                    100:                                    in this hash.
                    101: %Apache::inputtags::submission_display
                    102:                                  - <*response> tags store improved display
                    103:                                    of submission strings for display by part
                    104:                                    end.
                    105: 
                    106: =cut
1.178     albertel  107: 
1.1       albertel  108: sub initialize_inputtags {
1.135     albertel  109:     @Apache::inputtags::input=();
                    110:     @Apache::inputtags::inputlist=();
1.174     albertel  111:     @Apache::inputtags::response=();
1.135     albertel  112:     @Apache::inputtags::responselist=();
1.174     albertel  113:     @Apache::inputtags::hint=();
1.173     albertel  114:     @Apache::inputtags::hintlist=();
1.135     albertel  115:     @Apache::inputtags::previous=();
                    116:     @Apache::inputtags::previous_version=();
                    117:     $Apache::inputtags::part='';
                    118:     @Apache::inputtags::partlist=();
                    119:     @Apache::inputtags::status=();
                    120:     %Apache::inputtags::params=();
                    121:     @Apache::inputtags::import=();
                    122:     @Apache::inputtags::importlist=();
                    123:     $Apache::inputtags::response_with_no_part=0;
1.144     albertel  124:     %Apache::inputtags::answertxt=();
1.217     albertel  125:     %Apache::inputtags::submission_display=();
1.103     albertel  126: }
                    127: 
                    128: sub check_for_duplicate_ids {
                    129:     my %check;
                    130:     foreach my $id (@Apache::inputtags::partlist,
                    131: 		    @Apache::inputtags::responselist,
1.173     albertel  132: 		    @Apache::inputtags::hintlist,
1.103     albertel  133: 		    @Apache::inputtags::importlist) {
                    134: 	$check{$id}++;
                    135:     }
                    136:     my @duplicates;
                    137:     foreach my $id (sort(keys(%check))) {
                    138: 	if ($check{$id} > 1) {
                    139: 	    push(@duplicates,$id);
                    140: 	}
                    141:     }
                    142:     if (@duplicates) {
                    143: 	&Apache::lonxml::error("Duplicated ids found, problem will operate incorrectly. Duplicated ids seen: ",join(', ',@duplicates));
                    144:     }
1.1       albertel  145: }
                    146: 
1.14      albertel  147: sub start_input {
1.135     albertel  148:     my ($parstack,$safeeval)=@_;
1.228     albertel  149:     my $id = &Apache::lonxml::get_id($parstack,$safeeval);
1.135     albertel  150:     push (@Apache::inputtags::input,$id);
                    151:     push (@Apache::inputtags::inputlist,$id);
                    152:     return $id;
1.14      albertel  153: }
                    154: 
                    155: sub end_input {
1.135     albertel  156:     pop @Apache::inputtags::input;
                    157:     return '';
1.14      albertel  158: }
                    159: 
1.124     www       160: sub addchars {
                    161:     my ($fieldid,$addchars)=@_;
                    162:     my $output='';
                    163:     foreach (split(/\,/,$addchars)) {
                    164: 	$output.='<a href="javascript:void(document.forms.lonhomework.'.
                    165: 	    $fieldid.'.value+=\''.$_.'\')">'.$_.'</a> ';
                    166:     }
                    167:     return $output;
                    168: }
                    169: 
1.48      albertel  170: sub start_textfield {
1.185     albertel  171:     my ($target,$token,$tagstack,$parstack,$parser,$safeeval,$style)=@_;
1.135     albertel  172:     my $result = "";
                    173:     my $id = &start_input($parstack,$safeeval);
                    174:     my $resid=$Apache::inputtags::response[-1];
                    175:     if ($target eq 'web') {
                    176: 	$Apache::lonxml::evaluate--;
1.205     albertel  177: 	my $partid=$Apache::inputtags::part;
1.274     raeburn   178:         my ($oldresponse,$newvariation);
                    179:         if ((($Apache::lonhomework::history{"resource.$partid.type"} eq 'randomizetry') ||
                    180:              ($Apache::lonhomework::type eq 'randomizetry')) &&
                    181:              ($Apache::inputtags::status[-1] eq 'CAN_ANSWER')) {
                    182:             if ($env{'form.'.$partid.'.rndseed'} ne
                    183:                 $Apache::lonhomework::history{"resource.$partid.rndseed"}) {
                    184:                 $newvariation = 1;
                    185:             }
                    186:         }
                    187:         unless ($newvariation) {
1.302     raeburn   188: 	    $oldresponse = $Apache::lonhomework::history{"resource.$partid.$resid.submission"};
1.274     raeburn   189:         }
1.135     albertel  190: 	if ($Apache::inputtags::status[-1] eq 'CAN_ANSWER') {
                    191: 	    my $cols = &Apache::lonxml::get_param('cols',$parstack,$safeeval);
                    192: 	    if ( $cols eq '') { $cols = 80; }
                    193: 	    my $rows = &Apache::lonxml::get_param('rows',$parstack,$safeeval);
1.143     www       194: 	    if ( $rows eq '') { $rows = 16; }
1.135     albertel  195: 	    my $addchars=&Apache::lonxml::get_param('addchars',$parstack,$safeeval);
                    196: 	    $result='';
                    197: 	    if ($addchars) {
                    198: 		$result.=&addchars('HWVAL_'.$resid,$addchars);
                    199: 	    }
1.266     raeburn   200:             my $textareaclass = 'class="LC_richDetectHtml"';
1.143     www       201: 	    $result.= '<textarea wrap="hard" name="HWVAL_'.$resid.'" id="HWVAL_'.$resid.'" '.
1.266     raeburn   202: 		      'rows="'.$rows.'" cols="'.$cols.'" '.$textareaclass.'>'.
1.302     raeburn   203:                       &HTML::Entities::encode($oldresponse,'<>&"');
1.135     albertel  204: 	    if ($oldresponse ne '') {
1.143     www       205: 
1.135     albertel  206: 		#get rid of any startup text if the user has already responded
1.185     albertel  207: 		&Apache::lonxml::get_all_text("/textfield",$parser,$style);
1.135     albertel  208: 	    }
                    209: 	} else {
1.205     albertel  210: 	    #show past answer in the essayresponse case
                    211: 	    if ($oldresponse =~ /\S/
                    212: 		&& &Apache::londefdef::is_inside_of($tagstack,
                    213: 						    'essayresponse') ) {
                    214: 		$result='<table class="LC_pastsubmission"><tr><td>'.
                    215: 		    $oldresponse.'</td></tr></table>';
                    216: 	    }
1.135     albertel  217: 	    #get rid of any startup text
1.185     albertel  218: 	    &Apache::lonxml::get_all_text("/textfield",$parser,$style);
1.61      albertel  219: 	}
1.135     albertel  220:     } elsif ($target eq 'grade') {
1.185     albertel  221: 	my $seedtext=&Apache::lonxml::get_all_text("/textfield",$parser,
                    222: 						   $style);
1.165     albertel  223: 	if ($seedtext eq $env{'form.HWVAL_'.$resid}) {
1.135     albertel  224: 	    # if the seed text is still there it wasn't a real submission
1.165     albertel  225: 	    $env{'form.HWVAL_'.$resid}='';
1.135     albertel  226: 	}
                    227:     } elsif ($target eq 'edit') {
                    228: 	$result.=&Apache::edit::tag_start($target,$token);
                    229: 	$result.=&Apache::edit::text_arg('Rows:','rows',$token,4);
                    230: 	$result.=&Apache::edit::text_arg('Columns:','cols',$token,4);
                    231: 	$result.=&Apache::edit::text_arg
                    232: 	    ('Click-On Texts (comma sep):','addchars',$token,10);
1.185     albertel  233: 	my $bodytext=&Apache::lonxml::get_all_text("/textfield",$parser,
                    234: 						   $style);
1.135     albertel  235: 	$result.=&Apache::edit::editfield($token->[1],$bodytext,'Text you want to appear by default:',80,2);
                    236:     } elsif ($target eq 'modified') {
                    237: 	my $constructtag=&Apache::edit::get_new_args($token,$parstack,
                    238: 						     $safeeval,'rows','cols',
                    239: 						     'addchars');
                    240: 	if ($constructtag) {
                    241: 	    $result = &Apache::edit::rebuild_tag($token);
                    242: 	} else {
                    243: 	    $result=$token->[4];
                    244: 	}
                    245: 	$result.=&Apache::edit::modifiedfield("/textfield",$parser);
                    246:     } elsif ($target eq 'tex') {
                    247: 	my $number_of_lines = &Apache::lonxml::get_param('rows',$parstack,$safeeval);
                    248: 	my $width_of_box = &Apache::lonxml::get_param('cols',$parstack,$safeeval);
                    249: 	if ($$tagstack[-2] eq 'essayresponse' and $Apache::lonhomework::type eq 'exam') {
                    250: 	    $result = '\fbox{\fbox{\parbox{\textwidth-5mm}{';
                    251: 	    for (my $i=0;$i<int $number_of_lines*2;$i++) {$result.='\strut \\\\ ';}
                    252: 	    $result.='\strut \\\\\strut \\\\\strut \\\\\strut \\\\}}}';
                    253: 	} else {
                    254: 	    my $TeXwidth=$width_of_box/80;
                    255: 	    $result = '\vskip 1 mm \fbox{\fbox{\parbox{'.$TeXwidth.'\textwidth-5mm}{';
                    256: 	    for (my $i=0;$i<int $number_of_lines*2;$i++) {$result.='\strut \\\\ ';}
                    257: 	    $result.='}}}\vskip 2 mm ';
                    258: 	}
1.60      albertel  259:     }
1.135     albertel  260:     return $result;
1.6       albertel  261: }
                    262: 
1.48      albertel  263: sub end_textfield {
1.135     albertel  264:     my ($target,$token,$tagstack,$parstack,$parser,$safeeval)=@_;
                    265:     my $result;
                    266:     if ($target eq 'web') {
                    267: 	$Apache::lonxml::evaluate++;
                    268: 	if ($Apache::inputtags::status[-1] eq 'CAN_ANSWER') {
                    269: 	    return "</textarea>";
                    270: 	}
                    271:     } elsif ($target eq 'edit') {
                    272: 	$result=&Apache::edit::end_table();
                    273:     }
                    274:     &end_input;
                    275:     return $result;
1.6       albertel  276: }
                    277: 
1.190     albertel  278: sub exam_score_line {
1.188     albertel  279:     my ($target) = @_;
1.190     albertel  280: 
1.188     albertel  281:     my $result;
                    282:     if ($target eq 'tex') {
                    283: 	my $repetition = &Apache::response::repetition();
                    284: 	$result.='\begin{enumerate}';
1.190     albertel  285: 	if ($env{'request.state'} eq "construct" ) {$result.='\item[\strut]';}
1.188     albertel  286: 	foreach my $i (0..$repetition-1) {
                    287: 	    $result.='\item[\textbf{'.
                    288: 		($Apache::lonxml::counter+$i).
                    289: 		'}.]\textit{Leave blank on scoring form}\vskip 0 mm';
                    290: 	}
                    291: 	$result.= '\end{enumerate}';
1.190     albertel  292:     }
                    293: 
                    294:     return $result;
                    295: }
                    296: 
                    297: sub exam_box {
                    298:     my ($target) = @_;
                    299:     my $result;
1.188     albertel  300: 
1.190     albertel  301:     if ($target eq 'tex') {
                    302: 	$result .= '\fbox{\fbox{\parbox{\textwidth-5mm}{\strut\\\\\strut\\\\\strut\\\\\strut\\\\}}}';
                    303: 	$result .= &exam_score_line($target);
1.188     albertel  304:     } elsif ($target eq 'web') {
                    305: 	my $id=$Apache::inputtags::response[-1];
                    306: 	$result.= '<br /><br />
                    307:                    <textarea name="HWVAL_'.$id.'" rows="4" cols="50">
                    308:                    </textarea> <br /><br />';
                    309:     }
                    310:     return $result;
                    311: }
                    312: 
                    313: sub needs_exam_box {
                    314:     my ($tagstack) = @_;
                    315:     my @tags = ('formularesponse',
                    316: 		'stringresponse',
                    317: 		'reactionresponse',
                    318: 		'organicresponse',
                    319: 		);
                    320: 
                    321:     foreach my $tag (@tags) {
                    322: 	if (grep(/\Q$tag\E/,@$tagstack)) {
                    323: 	    return 1;
                    324: 	}
                    325:     }
                    326:     return 0;
                    327: }
                    328: 
1.1       albertel  329: sub start_textline {
1.135     albertel  330:     my ($target,$token,$tagstack,$parstack,$parser,$safeeval)=@_;
                    331:     my $result = "";
1.210     albertel  332:     my $input_id = &start_input($parstack,$safeeval);
1.135     albertel  333:     if ($target eq 'web') {
                    334: 	$Apache::lonxml::evaluate--;
                    335: 	my $partid=$Apache::inputtags::part;
                    336: 	my $id=$Apache::inputtags::response[-1];
1.204     albertel  337: 	if (!&Apache::response::show_answer()) {
1.135     albertel  338: 	    my $size = &Apache::lonxml::get_param('size',$parstack,$safeeval);
                    339: 	    my $maxlength;
                    340: 	    if ($size eq '') { $size=20; } else {
1.214     albertel  341: 		if ($size < 20) {
                    342: 		    $maxlength = ' maxlength="'.$size.'"';
                    343: 		}
1.135     albertel  344: 	    }
1.274     raeburn   345:             my ($oldresponse,$newvariation);
                    346:             if ((($Apache::lonhomework::history{"resource.$partid.type"} eq 'randomizetry') ||
                    347:                  ($Apache::lonhomework::type eq 'randomizetry')) &&
                    348:                  ($Apache::inputtags::status[-1] eq 'CAN_ANSWER')) {
                    349:                 if ($env{'form.'.$partid.'.rndseed'} ne
                    350:                     $Apache::lonhomework::history{"resource.$partid.rndseed"}) {
                    351:                     $newvariation = 1;
                    352:                 }
                    353:             }
                    354:             unless ($newvariation) {
                    355: 	        $oldresponse = $Apache::lonhomework::history{"resource.$partid.$id.submission"};
                    356: 	        &Apache::lonxml::debug("oldresponse $oldresponse is ".ref($oldresponse));
                    357: 	        if (ref($oldresponse) eq 'ARRAY') {
                    358: 		    $oldresponse = $oldresponse->[$#Apache::inputtags::inputlist];
                    359: 	        }
                    360: 	        $oldresponse = &HTML::Entities::encode($oldresponse,'<>&"');
                    361:                 $oldresponse =~ s/^\s+//;
                    362:                 $oldresponse =~ s/\s+$//;
                    363:                 $oldresponse =~ s/\s+/ /g;
                    364:             }
1.135     albertel  365: 	    if ($Apache::lonhomework::type ne 'exam') {
                    366: 		my $addchars=&Apache::lonxml::get_param('addchars',$parstack,$safeeval);
                    367: 		$result='';
                    368: 		if ($addchars) {
                    369: 		    $result.=&addchars('HWVAL_'.$id,$addchars);
                    370: 		}
1.157     albertel  371: 		my $readonly=&Apache::lonxml::get_param('readonly',$parstack,
                    372: 							$safeeval);
1.193     albertel  373: 		if (lc($readonly) eq 'yes' 
                    374: 		    || $Apache::inputtags::status[-1] eq 'CANNOT_ANSWER') {
1.157     albertel  375: 		    $readonly=' readonly="readonly" ';
1.158     albertel  376: 		} else {
                    377: 		    $readonly='';
1.157     albertel  378: 		}
1.193     albertel  379: 		my $name = 'HWVAL_'.$id;
                    380: 		if ($Apache::inputtags::status[-1] eq 'CANNOT_ANSWER') {
                    381: 		    $name = "none";
                    382: 		}
1.214     albertel  383: 		$result.= '<input onkeydown="javascript:setSubmittedPart(\''.$partid.'\');" type="text" '.$readonly.' name="'.$name.'" value="'.
                    384: 		    $oldresponse.'" size="'.$size.'"'.$maxlength.' />';
1.135     albertel  385: 	    }
1.188     albertel  386: 	    if ($Apache::lonhomework::type eq 'exam'
                    387: 		&& &needs_exam_box($tagstack)) {
                    388: 		$result.=&exam_box($target);
                    389: 	    }
1.135     albertel  390: 	} else {
                    391: 	    #right or wrong don't show what was last typed in.
1.208     albertel  392: 	    my $count = scalar(@Apache::inputtags::inputlist)-1;
                    393: 	    $result='<b>'.$Apache::inputtags::answertxt{$id}[$count].'</b>';
1.144     albertel  394: 	    #$result='';
1.135     albertel  395: 	}
                    396:     } elsif ($target eq 'edit') {
                    397: 	$result=&Apache::edit::tag_start($target,$token);
                    398: 	$result.=&Apache::edit::text_arg('Size:','size',$token,'5').
1.157     albertel  399: 	    &Apache::edit::text_arg('Click-On Texts (comma sep):',
                    400: 				    'addchars',$token,10);
                    401:         $result.=&Apache::edit::select_arg('Readonly:','readonly',
                    402: 					   ['no','yes'],$token);
                    403: 	$result.=&Apache::edit::end_row();
                    404: 	$result.=&Apache::edit::end_table();
1.135     albertel  405:     } elsif ($target eq 'modified') {
1.157     albertel  406: 	my $constructtag=&Apache::edit::get_new_args($token,$parstack,
                    407: 						     $safeeval,'size',
                    408: 						     'addchars','readonly');
1.135     albertel  409: 	if ($constructtag) { $result = &Apache::edit::rebuild_tag($token); }
1.188     albertel  410:     } elsif ($target eq 'tex' 
                    411: 	     && $Apache::lonhomework::type ne 'exam') {
1.135     albertel  412: 	my $size = &Apache::lonxml::get_param('size',$parstack,$safeeval);
                    413: 	if ($size != 0) {$size=$size*2; $size.=' mm';} else {$size='40 mm';}
1.257     onken     414: 	if ($env{'form.pdfFormFields'} eq 'yes'
                    415:             && $Apache::inputtags::status[-1] eq 'CAN_ANSWER') {
1.246     onken     416:             my $fieldname = $env{'request.symb'}.
                    417:                                  '&part_'. $Apache::inputtags::part.
                    418:                                  '&textresponse'.
                    419:                                  '&HWVAL_' . $Apache::inputtags::response['-1'];
1.259     onken     420:             $result='\textField{'.$fieldname.'}{'.$size.'}{12 bp}';
1.246     onken     421:         } else {
                    422:             $result='\framebox['.$size.'][s]{\tiny\strut}';
                    423:         }
1.188     albertel  424:     } elsif ($target eq 'tex' 
                    425: 	     && $Apache::lonhomework::type eq 'exam'
                    426: 	     && &needs_exam_box($tagstack)) {
                    427: 	$result.=&exam_box($target);
1.135     albertel  428:     }
                    429:     return $result;
1.1       albertel  430: }
                    431: 
                    432: sub end_textline {
1.135     albertel  433:     my ($target,$token,$tagstack,$parstack,$parser,$safeeval)=@_;
                    434:     if    ($target eq 'web') { $Apache::lonxml::evaluate++; }
                    435:     elsif ($target eq 'edit') { return ('','no'); }
1.208     albertel  436:     &end_input();
1.135     albertel  437:     return "";
1.9       albertel  438: }
                    439: 
1.98      albertel  440: sub start_hiddenline {
                    441:     my ($target,$token,$tagstack,$parstack,$parser,$safeeval)=@_;
                    442:     my $result = "";
1.211     albertel  443:     my $input_id = &start_input($parstack,$safeeval);
1.98      albertel  444:     if ($target eq 'web') {
                    445: 	$Apache::lonxml::evaluate--;
                    446: 	if ($Apache::inputtags::status[-1] eq 'CAN_ANSWER') {
                    447: 	    my $partid=$Apache::inputtags::part;
                    448: 	    my $id=$Apache::inputtags::response[-1];
1.211     albertel  449: 	    my $oldresponse = $Apache::lonhomework::history{"resource.$partid.$id.submission"};
                    450: 	    if (ref($oldresponse) eq 'ARRAY') {
                    451: 		$oldresponse = $oldresponse->[$#Apache::inputtags::inputlist];
                    452: 	    }
                    453: 	    $oldresponse = &HTML::Entities::encode($oldresponse,'<>&"');
                    454: 
1.98      albertel  455: 	    if ($Apache::lonhomework::type ne 'exam') {
                    456: 		$result= '<input type="hidden" name="HWVAL_'.$id.'" value="'.
                    457: 		    $oldresponse.'" />';
                    458: 	    }
                    459: 	}
                    460:     } elsif ($target eq 'edit') {
                    461: 	$result=&Apache::edit::tag_start($target,$token);
                    462: 	$result.=&Apache::edit::end_table;
                    463:     }
1.189     albertel  464: 
                    465:     if ( ($target eq 'web' || $target eq 'tex')
                    466: 	 && $Apache::lonhomework::type eq 'exam'
                    467: 	 && &needs_exam_box($tagstack)) {
                    468: 	$result.=&exam_box($target);
                    469:     }
1.98      albertel  470:     return $result;
                    471: }
                    472: 
                    473: sub end_hiddenline {
1.135     albertel  474:     my ($target,$token,$tagstack,$parstack,$parser,$safeeval)=@_;
                    475:     if    ($target eq 'web') { $Apache::lonxml::evaluate++; }
                    476:     elsif ($target eq 'edit') { return ('','no'); }
1.211     albertel  477:     &end_input();
1.135     albertel  478:     return "";
1.98      albertel  479: }
                    480: 
1.286     www       481: 
                    482: sub start_hiddensubmission {
                    483:     my ($target,$token,$tagstack,$parstack,$parser,$safeeval)=@_;
                    484:     my $result = "";
                    485:     my $input_id = &start_input($parstack,$safeeval);
                    486:     if ($target eq 'web') {
                    487:         $Apache::lonxml::evaluate--;
                    488:         if ($Apache::inputtags::status[-1] eq 'CAN_ANSWER') {
                    489:             my $partid=$Apache::inputtags::part;
                    490:             my $id=$Apache::inputtags::response[-1];
                    491:             if ($Apache::lonhomework::type ne 'exam') {
                    492:                 my $value = &Apache::lonxml::get_param('value',$parstack,$safeeval);
                    493:                 $value = &HTML::Entities::encode($value,'<>&"');
                    494:                 $result= '<input type="hidden" name="HWVAL_'.$id.'" value="'.$value.'" />';
                    495:             }
                    496:         }
                    497:     } elsif ($target eq 'edit') {
                    498:         $result=&Apache::edit::tag_start($target,$token);
                    499:         $result.=&Apache::edit::text_arg('Value:','value',$token,'15');
                    500:         $result.=&Apache::edit::end_row();
                    501:         $result.=&Apache::edit::end_table();
                    502:     } elsif ($target eq 'modified') {
                    503:         my $constructtag=&Apache::edit::get_new_args($token,$parstack,
                    504:                                                      $safeeval,'value');
                    505:         if ($constructtag) { $result = &Apache::edit::rebuild_tag($token); }
                    506:     }
                    507: 
                    508:     if ( ($target eq 'web' || $target eq 'tex')
                    509:          && $Apache::lonhomework::type eq 'exam'
                    510:          && &needs_exam_box($tagstack)) {
                    511:         $result.=&exam_box($target);
                    512:     }
                    513:     return $result;
                    514: }
                    515: 
                    516: sub end_hiddensubmission {
                    517:     my ($target,$token,$tagstack,$parstack,$parser,$safeeval)=@_;
                    518:     if    ($target eq 'web') { $Apache::lonxml::evaluate++; }
                    519:     elsif ($target eq 'edit') { return ('','no'); }
                    520:     &end_input();
                    521:     return "";
                    522: }
                    523: 
1.249     jms       524: =pod
                    525: 
                    526: =item file_selector()
                    527: 
                    528: $part -> partid
                    529: $id -> responseid
                    530: $uploadefiletypes -> comma seperated list of extensions allowed or * for any
1.252     raeburn   531: $which -> 'uploadonly'  -> only newly uploaded files
1.249     jms       532:           'portfolioonly' -> only allow files from portfolio
                    533:           'both' -> allow files from either location
                    534: $extratext -> additional text to go between the link and the input box
1.252     raeburn   535: $maxfilesize -> maximum cumulative filesize for submitted files (in MB).
1.249     jms       536: returns a table row <tr> 
                    537: 
                    538: =cut
                    539: 
1.160     albertel  540: sub file_selector {
1.252     raeburn   541:     my ($part,$id,$uploadedfiletypes,$which,$extratext,$maxfilesize)=@_;
1.160     albertel  542:     if (!$uploadedfiletypes) { return ''; }
1.167     albertel  543: 
                    544:     my $jspart=$part;
                    545:     $jspart=~s/\./_/g;
                    546: 
1.160     albertel  547:     my $result;
1.265     raeburn   548:     my $current_files_display = &current_file_submissions($part,$id);
                    549:     my $addfiles;
                    550:     if ($current_files_display) {
1.268     raeburn   551:         $result .= &Apache::lonhtmlcommon::row_title(&mt('Currently submitted files')).
1.265     raeburn   552:                    $current_files_display.
                    553:                    &Apache::lonhtmlcommon::row_closure();
                    554:         $addfiles = &mt('Submit other file(s)');
                    555:     } else {
                    556:         $addfiles = &mt('Choose file(s) to submit');
                    557:     }
                    558:     $result .= &Apache::lonhtmlcommon::row_title($addfiles);
                    559:     my $constraints;
                    560:     if ($uploadedfiletypes ne '*') {
                    561: 	$constraints =
                    562: 	    &mt('Allowed filetypes: [_1]','<b>'.$uploadedfiletypes.'</b>').'<br />';
                    563:     }
                    564:     if ($maxfilesize) {
                    565:         $constraints .= &mt('Combined size of all files not to exceed: [_1] MB[_2].',
                    566:                         '<b>'.$maxfilesize.'</b>').'<br />';
                    567:     }
                    568:     if ($constraints) {
                    569:         $result .= $constraints.'<br />';
1.162     albertel  570:     }
1.160     albertel  571:     if ($which eq 'uploadonly' || $which eq 'both') { 
1.265     raeburn   572: 	$result.=&mt('Submit a file: (only one file per submission)').
1.160     albertel  573: 	    ' <br /><input type="file" size="50" name="HWFILE'.
1.293     raeburn   574: 	    $jspart.'_'.$id.'" id="HWFILE'.$jspart.'_'.$id.'" /><br />';
1.160     albertel  575:     }
1.265     raeburn   576:     if ( $which eq 'both') {
1.160     albertel  577: 	$result.='<br />'.'<strong>'.&mt('OR:').'</strong><br />';
                    578:     }
1.303     raeburn   579:     if ($which eq 'portfolioonly' || $which eq 'both') {
                    580:         my $symb = $env{'request.symb'};
                    581:         (undef,undef,my $res)=&Apache::lonnet::decode_symb($symb);
                    582:         my $showsymb;
                    583:         # If resource is a .task and URL is unencrypted, include symb in query string
                    584:         # for url opened in portfolio file selection window. Can be used to override
                    585:         # blocking of portfolio access resulting from an exam event in a different course. 
                    586:         if ($res =~ /\.task$/i) {
                    587:             my $encsymb = &Apache::lonenc::check_encrypt($symb);
                    588:             if ($symb eq $encsymb) {
                    589:                 $showsymb = $symb;
                    590:             }
                    591:         }
1.306     raeburn   592: 	$result.=$extratext.'<a href='."'".'javascript:void(window.open("/adm/portfolio?mode=selectfile&amp;fieldname='.$env{'form.request.prefix'}.'HWPORT'.$jspart.'_'.$id.'&amp;symb='.$showsymb.'","cat","height=600,width=800,scrollbars=1,resizable=1,menubar=2,location=1"))'."'".'>'.
1.265     raeburn   593: 	    &mt('Select Portfolio Files: (one or more files per submission)').'</a><br />'.
1.167     albertel  594: 	    '<input type="text" size="50" name="HWPORT'.$jspart.'_'.$id.'" value="" />'.
1.160     albertel  595: 	    '<br />';
1.265     raeburn   596: 
1.160     albertel  597:     }
1.265     raeburn   598:     $result.=&Apache::lonhtmlcommon::row_closure(1);
1.160     albertel  599:     return $result;
                    600: }
                    601: 
1.265     raeburn   602: sub current_file_submissions {
1.205     albertel  603:     my ($part,$id) = @_;
1.265     raeburn   604:     my $jspart=$part;
                    605:     $jspart=~s/\./_/g;
1.270     raeburn   606:     my $uploadedfile=$Apache::lonhomework::history{"resource.$part.$id.uploadedfile"};
1.265     raeburn   607:     my $portfiles=$Apache::lonhomework::history{"resource.$part.$id.portfiles"};
                    608:     return if (($uploadedfile eq '') && ($portfiles !~/[^\s]/));
                    609:     my $header = &Apache::loncommon::start_data_table().
1.270     raeburn   610:                  &Apache::loncommon::start_data_table_header_row();
                    611:     if ($Apache::inputtags::status[-1] eq 'CAN_ANSWER') {
                    612:         $header .= '<th>'.&mt('Delete?').'</th>';
                    613:     }
1.271     raeburn   614:     $header .=   '<th>'.&mt('File').'</th>'.
1.265     raeburn   615:                  '<th>'.&mt('Size (MB)').'</th>'.
                    616:                  '<th>'.&mt('Last Modified').'</th>'.
                    617:                  &Apache::loncommon::end_data_table_header_row();
                    618:     my (undef,$crsid,$udom,$uname)=&Apache::lonnet::whichuser();
                    619:     my ($cdom,$cnum) = ($crsid =~ /^($LONCAPA::match_domain)_($LONCAPA::match_courseid)$/);
1.271     raeburn   620:     my ($result,$header_shown,%okfiles,%rows,%legacy,@bad_file_list);
1.265     raeburn   621:     if ($uploadedfile) {
                    622:         my $url=$Apache::lonhomework::history{"resource.$part.$id.uploadedurl"};
1.270     raeburn   623:         my $link = &HTML::Entities::encode($url,'<>&"');
                    624:         my ($path,$name) = ($url =~ m{^(/uploaded/\Q$udom\E/\Q$uname\E/essayresponse.*/)([^/]+)$});
1.265     raeburn   625:         my ($status,$hashref,$error) =
1.270     raeburn   626:             &current_file_info($url,$link,$name,$path);
1.265     raeburn   627:         if ($status eq 'ok') {
                    628:             push(@{$okfiles{$name}},$url);
                    629:             $rows{$url} = $hashref;
1.271     raeburn   630:             $legacy{$url} = 1;
1.265     raeburn   631:             &Apache::lonxml::extlink($url);
                    632:             &Apache::lonnet::allowuploaded('/adm/essayresponse',$url);
                    633:         } else {
                    634:             push(@bad_file_list,$error);
                    635:         }
                    636:     }
                    637:     if ($portfiles =~ /[^\s]/) {
                    638:         my $prefix = "/uploaded/$udom/$uname/portfolio";
                    639:         foreach my $file (split(/\s*,\s*/,&unescape($portfiles))) {
                    640:             my ($path,$name) = ($file =~ m{^(.*/)([^/]+)$});
                    641:             my $url = $prefix.$path.$name;
                    642:             my $uploadedfile = &HTML::Entities::encode($url,'<>&"');
                    643:             my ($status,$hashref,$error) =
                    644:                 &current_file_info($url,$uploadedfile,$name,$path);
                    645:             if ($status eq 'ok') {
                    646:                 push(@{$okfiles{$name}},$url);
                    647:                 $rows{$url} = $hashref;
                    648:             } else {
                    649:                 push(@bad_file_list,$error);
                    650:             }
                    651:         }
                    652:     }
1.276     raeburn   653:     my $num = 0;
1.265     raeburn   654:     foreach my $name (sort(keys(%okfiles))) {
                    655:         if (ref($okfiles{$name}) eq 'ARRAY') {
                    656:             foreach my $url (@{$okfiles{$name}}) {
                    657:                 if (ref($rows{$url}) eq 'HASH') {
                    658:                     my $link = $rows{$url}{link};
                    659:                     my $portfile = $rows{$url}{path}.$rows{$url}{name};
                    660:                     $portfile = &HTML::Entities::encode($portfile,'<>&"');
                    661:                     if ($link) {
                    662:                         my $icon=&Apache::loncommon::icon($url);
                    663:                         unless ($header_shown) {
                    664:                             $result .= $header;
                    665:                             $header_shown = 1;
                    666:                         }
                    667:                         $result.=
1.270     raeburn   668:                             &Apache::loncommon::start_data_table_row()."\n";
                    669:                         if ($Apache::inputtags::status[-1] eq 'CAN_ANSWER') {
                    670:                             $result .=
                    671:                                  '<td valign="bottom"><input type="checkbox" name="HWFILE'.$jspart.'_'.$id.'_delete"'.
1.273     raeburn   672:                                  ' value="'.$portfile.'" id="HWFILE'.$jspart.'_'.$id.'_'.$num.'_delete" /></td>'."\n";
                    673:                             $num ++;
1.270     raeburn   674:                         }
1.271     raeburn   675:                         my $showname = $rows{$url}{path}.$name;
                    676:                         if ($legacy{$url}) {
                    677:                             $showname = $name.' '.&mt('not in portfolio');
                    678:                         }
1.270     raeburn   679:                         $result .= 
1.265     raeburn   680:                             '<td><a href="'.$link.'"><img src="'.$icon.
1.277     raeburn   681:                             '" border="0" alt="" />'.$showname.'</a></td>'."\n".
1.265     raeburn   682:                             '<td align="right" valign="bottom">'.$rows{$url}{size}.'</td>'."\n".
                    683:                             '<td align="right" valign="bottom">'.$rows{$url}{lastmodified}.'</td>'."\n".
                    684:                             &Apache::loncommon::end_data_table_row();
                    685:                     }
                    686:                 }
                    687:             }
                    688:         }
                    689:     }
                    690:     if ($header_shown) {
1.307   ! raeburn   691:         $result .= &Apache::loncommon::end_data_table();
        !           692:         if ($Apache::inputtags::status[-1] eq 'CAN_ANSWER') {
        !           693:             $result .= '<br /><span class="LC_warning">'.
        !           694:                        &mt('Exclude existing file(s) from grading by checking the "Delete?" checkbox(es) and clicking "Submit Answer"').'</span>';
        !           695:         }
1.205     albertel  696:     }
                    697:     if (@bad_file_list) {
1.265     raeburn   698:         my $bad_files = '<span class="LC_filename">'.
                    699:             join('</span>, <span class="LC_filename">',@bad_file_list).
                    700:             '</span>';
                    701:         $result.='<p class="LC_error">'.
                    702:                  &mt("These file(s) don't exist: [_1]",$bad_files).
                    703:                  '</p>';
1.205     albertel  704:     }
                    705:     return $result;
1.265     raeburn   706: }
1.205     albertel  707: 
1.265     raeburn   708: sub current_file_info {
                    709:     my ($url,$uploadedfile,$name,$path) = @_;
                    710:     my ($status,$error,%info);
                    711:     my @stat = &Apache::lonnet::stat_file($url);
                    712:     if ((@stat) && ($stat[0] ne 'no_such_dir')) {
                    713:         my ($lastmod,$size);
                    714:         if ($stat[9] =~ /^\d+$/) {
                    715:             $lastmod = &Apache::lonlocal::locallocaltime($stat[9]);
                    716:         }
                    717:         $size = $stat[7]/(1024*1024);
                    718:         $size = sprintf("%.3f",$size);
                    719:         %info = (
                    720:                     link         => $uploadedfile,
                    721:                     name         => $name,
                    722:                     path         => $path,
                    723:                     size         => $size,
                    724:                     lastmodified => $lastmod,
                    725:                 );
                    726:         $status = 'ok';
                    727:     } else {
                    728:         &Apache::lonnet::logthis("bad file is $url");
                    729:         my $icon=&Apache::loncommon::icon($url);
                    730:         $error = '<a href="'.$url.'"><img src="'.$icon.
                    731:                  '" border="0" />'.$uploadedfile.'</a>';
                    732:     }
                    733:     return ($status,\%info,$error);
1.205     albertel  734: }
                    735: 
1.179     albertel  736: sub valid_award {
                    737:     my ($award) =@_;
1.182     albertel  738:     foreach my $possibleaward ('EXTRA_ANSWER','MISSING_ANSWER', 'ERROR',
                    739: 			       'NO_RESPONSE',
1.179     albertel  740: 			       'TOO_LONG', 'UNIT_INVALID_INSTRUCTOR',
                    741: 			       'UNIT_INVALID_STUDENT', 'UNIT_IRRECONCIBLE',
                    742: 			       'UNIT_FAIL', 'NO_UNIT',
                    743: 			       'UNIT_NOTNEEDED', 'WANTED_NUMERIC',
1.272     www       744: 			       'BAD_FORMULA', 'NOT_FUNCTION', 'WRONG_FORMAT', 
                    745:                                'INTERNAL_ERROR', 'SIG_FAIL', 'INCORRECT', 
1.179     albertel  746: 			       'MISORDERED_RANK', 'INVALID_FILETYPE',
1.264     raeburn   747:                                'EXCESS_FILESIZE', 'FILENAME_INUSE', 
                    748: 			       'DRAFT', 'SUBMITTED', 'SUBMITTED_CREDIT', 
1.261     raeburn   749:                                'ANONYMOUS', 'ANONYMOUS_CREDIT',
                    750:                                'ASSIGNED_SCORE', 'APPROX_ANS',
                    751: 			       'EXACT_ANS','COMMA_FAIL') {
1.179     albertel  752: 	if ($award eq $possibleaward) { return 1; }
                    753:     }
                    754:     return 0;
                    755: }
                    756: 
1.207     albertel  757: {
                    758:     my @awards = ('EXTRA_ANSWER', 'MISSING_ANSWER', 'ERROR', 'NO_RESPONSE',
                    759: 		  'TOO_LONG',
                    760: 		  'UNIT_INVALID_INSTRUCTOR', 'UNIT_INVALID_STUDENT',
                    761: 		  'UNIT_IRRECONCIBLE', 'UNIT_FAIL', 'NO_UNIT',
1.272     www       762: 		  'UNIT_NOTNEEDED', 'WANTED_NUMERIC', 'BAD_FORMULA',  'NOT_FUNCTION', 
                    763:                   'WRONG_FORMAT', 'INTERNAL_ERROR',
1.207     albertel  764: 		  'COMMA_FAIL', 'SIG_FAIL', 'INCORRECT', 'MISORDERED_RANK',
1.264     raeburn   765: 		  'INVALID_FILETYPE', 'EXCESS_FILESIZE', 'FILENAME_INUSE', 
                    766:                   'DRAFT', 'SUBMITTED',
1.261     raeburn   767:                   'SUBMITTED_CREDIT', 'ANONYMOUS', 'ANONYMOUS_CREDIT',
1.248     raeburn   768:                   'ASSIGNED_SCORE', 'APPROX_ANS', 'EXACT_ANS');
1.207     albertel  769:     my $i=0;
                    770:     my %fwd_awards = map { ($_,$i++) } @awards;
                    771:     my $max=scalar(@awards);
                    772:     @awards=reverse(@awards);
1.208     albertel  773:     $i=0;
1.207     albertel  774:     my %rev_awards = map { ($_,$i++) } @awards;
                    775: 
1.232     albertel  776: sub awarddetail_to_awarded {
                    777:     my ($awarddetail) = @_;
                    778:     if ($awarddetail eq 'EXACT_ANS'
                    779: 	|| $awarddetail eq 'APPROX_ANS') {
                    780: 	return 1;
                    781:     }
                    782:     return 0;
                    783: }
                    784: 
1.233     albertel  785: sub hide_award {
                    786:     my ($award) = @_;
                    787:     if (&Apache::lonhomework::show_no_problem_status()) {
                    788: 	return 1;
                    789:     }
                    790:     if ($award =~
1.261     raeburn   791: 	/^(?:EXACT_ANS|APPROX_ANS|SUBMITTED|SUBMITTED_CREDIT|ANONYMOUS|ANONYMOUS_CREDIT|ASSIGNED_SCORE|INCORRECT)/) {
1.233     albertel  792: 	return 1;
                    793:     }
                    794:     return 0;
                    795: }
                    796: 
1.9       albertel  797: sub finalizeawards {
1.232     albertel  798:     my ($awardref,$msgref,$nameref,$reverse,$final_scantron)=@_;
1.207     albertel  799:     my $result;
1.136     albertel  800:     if ($#$awardref == -1) { $result = "NO_RESPONSE"; }
1.135     albertel  801:     if ($result eq '' ) {
                    802: 	my $blankcount;
1.207     albertel  803: 	foreach my $award (@$awardref) {
1.135     albertel  804: 	    if ($award eq '') {
                    805: 		$result='MISSING_ANSWER';
                    806: 		$blankcount++;
                    807: 	    }
                    808: 	}
1.232     albertel  809: 	if ($blankcount == ($#$awardref + 1)) {
                    810: 	    return ('NO_RESPONSE');
                    811: 	}
1.135     albertel  812:     }
1.251     www       813: 
                    814:     if ($Apache::lonxml::internal_error) { $result='INTERNAL_ERROR'; }
                    815: 
1.232     albertel  816:     if (!$final_scantron && defined($result)) { return ($result); }
1.181     albertel  817: 
1.232     albertel  818:     # if in scantron mode, if the award for any response is 
                    819:     # assigned score, then the part gets an assigned score
                    820:     if ($final_scantron 
                    821: 	&& grep {$_ eq 'ASSIGNED_SCORE'} (@$awardref)) {
                    822: 	return ('ASSIGNED_SCORE');
                    823:     }
                    824: 
                    825:     # if in scantron mode, if the award for any response is 
                    826:     # correct and there are non-correct responses,
                    827:     # then the part gets an assigned score
                    828:     if ($final_scantron 
                    829: 	&& (grep { $_ eq 'EXACT_ANS' ||
                    830: 		   $_ eq 'APPROX_ANS'  } (@$awardref))
                    831: 	&& (grep { $_ ne 'EXACT_ANS' &&
                    832: 		   $_ ne 'APPROX_ANS'  } (@$awardref))) {
                    833: 	return ('ASSIGNED_SCORE');
                    834:     }
1.181     albertel  835:     # these awards are ordered from most important error through best correct
1.207     albertel  836:     my $awards = (!$reverse) ? \%fwd_awards : \%rev_awards ;
                    837: 
                    838:     my $best = $max;
                    839:     my $j=0;
                    840:     my $which;
                    841:     foreach my $award (@$awardref) {
                    842: 	if ($awards->{$award} < $best) {
                    843: 	    $best  = $awards->{$award};
                    844: 	    $which = $j;
                    845: 	}
                    846: 	$j++;
                    847:     }
1.232     albertel  848: 
1.207     albertel  849:     if (defined($which)) {
                    850: 	if (ref($nameref)) {
                    851: 	    return ($$awardref[$which],$$msgref[$which],$$nameref[$which]);
                    852: 	} else {
                    853: 	    return ($$awardref[$which],$$msgref[$which]);
                    854: 	}
1.135     albertel  855:     }
1.136     albertel  856:     return ('ERROR',undef);
1.9       albertel  857: }
1.207     albertel  858: }
1.9       albertel  859: 
1.10      albertel  860: sub decideoutput {
1.282     www       861:     my ($award,$awarded,$awardmsg,$solved,$previous,$target,$nocorrect)=@_;
1.251     www       862: 
1.135     albertel  863:     my $message='';
                    864:     my $button=0;
                    865:     my $previousmsg;
1.221     albertel  866:     my $css_class='orange';
1.148     albertel  867:     my $added_computer_text=0;
1.221     albertel  868:     my %possible_class =
                    869: 	( 'correct'         => 'LC_answer_correct',
                    870: 	  'charged_try'     => 'LC_answer_charged_try',
                    871: 	  'not_charged_try' => 'LC_answer_not_charged_try',
                    872: 	  'no_grade'        => 'LC_answer_no_grade',
                    873: 	  'no_message'      => 'LC_no_message',
1.135     albertel  874: 	  );
1.169     albertel  875: 
1.180     albertel  876:     my $part = $Apache::inputtags::part;
1.236     raeburn   877:     my $tohandgrade = &Apache::lonnet::EXT("resource.$part.handgrade");
                    878:     my $handgrade = ('yes' eq lc($tohandgrade)); 
1.282     www       879: #
                    880: # Should "Computer's Answer" be displayed?
                    881: # Should not be displayed if still answerable,
                    882: # if the problem is handgraded,
                    883: # or if the problem does not give a correct answer
                    884: #
1.180     albertel  885:     
1.282     www       886:     my $computer = ($handgrade || $nocorrect)? ''
1.203     www       887: 	                       : " ".&mt("Computer's answer now shown above.");
1.180     albertel  888:     &Apache::lonxml::debug("handgrade has :$handgrade:");
                    889: 
1.135     albertel  890:     if ($previous) { $previousmsg=&mt('You have entered that answer before'); }
                    891:     
1.194     banghart  892:     if ($solved =~ /^correct/) {
1.221     albertel  893:         $css_class=$possible_class{'correct'};
1.170     albertel  894: 	$message=&mt('You are correct.');
                    895: 	if ($awarded < 1 && $awarded > 0) {
                    896: 	    $message=&mt('You are partially correct.');
1.221     albertel  897: 	    $css_class=$possible_class{'not_charged_try'};
1.170     albertel  898: 	} elsif ($awarded < 1) {
                    899: 	    $message=&mt('Incorrect.');
1.221     albertel  900: 	    $css_class=$possible_class{'charged_try'};
1.170     albertel  901: 	}
1.291     www       902: 	if ($handgrade || 
                    903:             ($env{'request.filename'}=~/\/res\/lib\/templates\/(examupload|DropBox).problem$/)) {
1.172     albertel  904: 	    $message = &mt("A score has been assigned.");
                    905: 	    $added_computer_text=1;
1.135     albertel  906: 	} else {
1.172     albertel  907: 	    if ($target eq 'tex') {
                    908: 		$message = '\textbf{'.$message.'}';
                    909: 	    } else {
                    910: 		$message = "<b>".$message."</b>";
1.180     albertel  911: 		$message.= $computer;
1.135     albertel  912: 	    }
1.172     albertel  913: 	    $added_computer_text=1;
1.235     albertel  914: 	    if ($awarded > 0) {
                    915: 		my ($symb) = &Apache::lonnet::whichuser();
                    916: 		if (($symb ne '') 
                    917: 		    &&
                    918: 		    ($env{'course.'.$env{'request.course.id'}.
1.237     www       919: 			      '.disable_receipt_display'} ne 'yes') &&
                    920:                     ($Apache::lonhomework::type ne 'practice')) { 
1.235     albertel  921: 		    $message.=(($target eq 'web')?'<br />':' ').
1.256     biermanm  922: 			&mt('Your receipt no. is [_1]',
1.235     albertel  923: 			    (&Apache::lonnet::receipt($Apache::inputtags::part).
                    924: 			     (($target eq 'web')?&Apache::loncommon::help_open_topic('Receipt'):'')));
                    925: 		}
1.135     albertel  926: 	    }
                    927: 	}
1.299     raeburn   928:         if ($awarded >= 1) {
1.296     raeburn   929:             $button=0;
1.299     raeburn   930:         } elsif (&Apache::lonnet::EXT("resource.$part.retrypartial") !~/^1|on|yes$/i) {
1.296     raeburn   931:             $button=0;
1.299     raeburn   932:         } else {
1.296     raeburn   933:             $button=1;
                    934:         }
1.135     albertel  935: 	$previousmsg='';
                    936:     } elsif ($solved =~ /^excused/) {
                    937: 	if ($target eq 'tex') {
                    938: 	    $message = ' \textbf{'.&mt('You are excused from the problem.').'} ';
                    939: 	} else {
                    940: 	    $message = "<b>".&mt('You are excused from the problem.')."</b>";
                    941: 	}
1.221     albertel  942: 	$css_class=$possible_class{'charged_try'};
1.135     albertel  943: 	$button=0;
                    944: 	$previousmsg='';
                    945:     } elsif ($award eq 'EXACT_ANS' || $award eq 'APPROX_ANS' ) {
                    946: 	if ($solved =~ /^incorrect/ || $solved eq '') {
1.144     albertel  947: 	    $message = &mt("Incorrect").".";
1.221     albertel  948: 	    $css_class=$possible_class{'charged_try'};
1.135     albertel  949: 	    $button=1;
                    950: 	} else {
1.144     albertel  951: 	    if ($target eq 'tex') {
                    952: 		$message = '\textbf{'.&mt('You are correct.').'}';
                    953: 	    } else {
                    954: 		$message = "<b>".&mt('You are correct.')."</b>";
1.180     albertel  955: 		$message.= $computer;
1.144     albertel  956: 	    }
1.148     albertel  957: 	    $added_computer_text=1;
1.235     albertel  958: 	    if  ($awarded > 0 
                    959: 		 && $env{'course.'.
1.165     albertel  960: 			     $env{'request.course.id'}.
1.235     albertel  961: 			     '.disable_receipt_display'} ne 'yes') { 
1.135     albertel  962: 		$message.=(($target eq 'web')?'<br />':' ').
1.235     albertel  963: 		    &mt('Your receipt is [_1]',
                    964: 			(&Apache::lonnet::receipt($Apache::inputtags::part).
                    965: 			 (($target eq 'web')?&Apache::loncommon::help_open_topic('Receipt'):'')));
1.135     albertel  966: 	    }
1.221     albertel  967: 	    $css_class=$possible_class{'correct'};
1.135     albertel  968: 	    $button=0;
                    969: 	    $previousmsg='';
                    970: 	}
                    971:     } elsif ($award eq 'NO_RESPONSE') {
                    972: 	$message = '';
1.221     albertel  973: 	$css_class=$possible_class{'no_feedback'};
1.135     albertel  974: 	$button=1;
1.182     albertel  975:     } elsif ($award eq 'EXTRA_ANSWER') {
                    976: 	$message = &mt('Some extra items were submitted.');
1.221     albertel  977: 	$css_class=$possible_class{'not_charged_try'};
1.182     albertel  978: 	$button = 1;
1.135     albertel  979:     } elsif ($award eq 'MISSING_ANSWER') {
1.245     bisitz    980: 	$message = &mt('Some items were not submitted.');
                    981:         if ($target ne 'tex') {
                    982:            $message .= &Apache::loncommon::help_open_topic('Some_Items_Were_Not_Submitted');
                    983:         }
1.221     albertel  984: 	$css_class=$possible_class{'not_charged_try'};
1.135     albertel  985: 	$button = 1;
                    986:     } elsif ($award eq 'ERROR') {
1.247     bisitz    987: 	$message = &mt('An error occurred while grading your answer.');
1.221     albertel  988: 	$css_class=$possible_class{'not_charged_try'};
1.135     albertel  989: 	$button = 1;
                    990:     } elsif ($award eq 'TOO_LONG') {
                    991: 	$message = &mt("The submitted answer was too long.");
1.221     albertel  992: 	$css_class=$possible_class{'not_charged_try'};
1.135     albertel  993: 	$button=1;
                    994:     } elsif ($award eq 'WANTED_NUMERIC') {
                    995: 	$message = &mt("This question expects a numeric answer.");
1.221     albertel  996: 	$css_class=$possible_class{'not_charged_try'};
1.135     albertel  997: 	$button=1;
                    998:     } elsif ($award eq 'MISORDERED_RANK') {
1.242     bisitz    999:         $message = &mt('You have provided an invalid ranking.');
                   1000:         if ($target ne 'tex') {
                   1001:             $message.=' '.&mt('Please refer to [_1]',&Apache::loncommon::help_open_topic('Ranking_Problems',&mt('help on ranking problems')));
                   1002:         }
1.221     albertel 1003: 	$css_class=$possible_class{'not_charged_try'};
1.135     albertel 1004: 	$button=1;
1.248     raeburn  1005:     } elsif ($award eq 'EXCESS_FILESIZE') {
                   1006:         $message = &mt('Submission won\'t be graded. The combined size of submitted files exceeded the amount allowed.');
                   1007:         $css_class=$possible_class{'not_charged_try'};
                   1008:         $button=1;
1.264     raeburn  1009:     } elsif ($award eq 'FILENAME_INUSE') {
                   1010:         $message = &mt('You have already uploaded a file with that filename.');
                   1011:         if ($target eq 'tex') {
                   1012:             $message.= "\\\\\n";
                   1013:         } else {
                   1014:             $message .= '<br />';
                   1015:         }
                   1016:         $message .= &mt('Please use a different file name.');
                   1017:         $css_class=$possible_class{'not_charged_try'};
                   1018:         $button=1;
1.135     albertel 1019:     } elsif ($award eq 'INVALID_FILETYPE') {
1.255     bisitz   1020: 	$message = &mt("Submission won't be graded. The type of file submitted is not allowed.");
1.221     albertel 1021: 	$css_class=$possible_class{'not_charged_try'};
1.135     albertel 1022: 	$button=1;
                   1023:     } elsif ($award eq 'SIG_FAIL') {
1.145     albertel 1024: 	my ($used,$min,$max)=split(':',$awardmsg);
1.212     albertel 1025: 	my $word = ($used < $min) ? 'more' : 'fewer';
1.250     bisitz   1026: 	$message = &mt("Submission not graded. Use $word digits.",$used);
1.221     albertel 1027: 	$css_class=$possible_class{'not_charged_try'};
1.135     albertel 1028: 	$button=1;
1.137     albertel 1029:     } elsif ($award eq 'UNIT_INVALID_INSTRUCTOR') {
                   1030: 	$message = &mt('Error in instructor specifed unit. This error has been reported to the instructor.', $awardmsg);
                   1031: 	if ($target ne 'tex') {$message.=&Apache::loncommon::help_open_topic('Physical_Units');} 
1.221     albertel 1032: 	$css_class=$possible_class{'not_charged_try'};
1.137     albertel 1033: 	$button=1;
                   1034:     } elsif ($award eq 'UNIT_INVALID_STUDENT') {
1.155     albertel 1035: 	$message = &mt('Unable to interpret units. Computer reads units as "[_1]".',&markup_unit($awardmsg,$target));
1.137     albertel 1036: 	if ($target ne 'tex') {$message.=&Apache::loncommon::help_open_topic('Physical_Units');} 
1.221     albertel 1037: 	$css_class=$possible_class{'not_charged_try'};
1.137     albertel 1038: 	$button=1;
1.140     matthew  1039:     } elsif ($award eq 'UNIT_FAIL' || $award eq 'UNIT_IRRECONCIBLE') {
1.155     albertel 1040: 	$message = &mt('Incompatible units. No conversion found between "[_1]" and the required units.',&markup_unit($awardmsg,$target));
1.136     albertel 1041: 	if ($target ne 'tex') {$message.=&Apache::loncommon::help_open_topic('Physical_Units');} 
1.221     albertel 1042: 	$css_class=$possible_class{'not_charged_try'};
1.135     albertel 1043: 	$button=1;
                   1044:     } elsif ($award eq 'UNIT_NOTNEEDED') {
1.155     albertel 1045: 	$message = &mt('Only a number required. Computer reads units of "[_1]".',&markup_unit($awardmsg,$target));
1.221     albertel 1046: 	$css_class=$possible_class{'not_charged_try'};
1.135     albertel 1047: 	$button=1;
                   1048:     } elsif ($award eq 'NO_UNIT') {
1.144     albertel 1049: 	$message = &mt("Units required").'.';
1.135     albertel 1050: 	if ($target ne 'tex') {$message.=&Apache::loncommon::help_open_topic('Physical_Units')};
1.221     albertel 1051: 	$css_class=$possible_class{'not_charged_try'};
1.135     albertel 1052: 	$button=1;
1.153     albertel 1053:     } elsif ($award eq 'COMMA_FAIL') {
                   1054: 	$message = &mt("Proper comma separation is required").'.';
1.221     albertel 1055: 	$css_class=$possible_class{'not_charged_try'};
1.153     albertel 1056: 	$button=1;
1.135     albertel 1057:     } elsif ($award eq 'BAD_FORMULA') {
1.240     www      1058: 	$message = &mt("Unable to understand formula").'.';
                   1059:         if ($target ne 'tex') {$message.=&Apache::loncommon::help_open_topic('Formula_Answers')};
1.221     albertel 1060: 	$css_class=$possible_class{'not_charged_try'};
1.135     albertel 1061: 	$button=1;
1.272     www      1062:     } elsif ($award eq 'NOT_FUNCTION') {
                   1063:         $message = &mt("Not a function").'.';
                   1064:         $css_class=$possible_class{'not_charged_try'};
                   1065:         $button=1;
                   1066:     } elsif ($award eq 'WRONG_FORMAT') {
                   1067:         $message = &mt("Wrong format").'.';
                   1068:         $css_class=$possible_class{'not_charged_try'};
                   1069:         $button=1;
                   1070:      } elsif ($award eq 'INTERNAL_ERROR') {
1.251     www      1071:         $message = &mt("An internal error occurred while processing your answer. Please try again later.");
                   1072:         $css_class=$possible_class{'not_charged_try'};
                   1073:         $button=1;
1.135     albertel 1074:     } elsif ($award eq 'INCORRECT') {
1.144     albertel 1075: 	$message = &mt("Incorrect").'.';
1.221     albertel 1076: 	$css_class=$possible_class{'charged_try'};
1.135     albertel 1077: 	$button=1;
                   1078:     } elsif ($award eq 'SUBMITTED') {
                   1079: 	$message = &mt("Your submission has been recorded.");
1.221     albertel 1080: 	$css_class=$possible_class{'no_grade'};
1.135     albertel 1081: 	$button=1;
1.261     raeburn  1082:     } elsif ($award eq 'SUBMITTED_CREDIT') {
                   1083:         $message = &mt("Your submission has been recorded, and credit awarded.");
                   1084:         $css_class=$possible_class{'correct'};
                   1085:         $button=1;
                   1086:     } elsif ($award eq 'ANONYMOUS') {
                   1087:         $message = &mt("Your anonymous submission has been recorded.");
                   1088:         $css_class=$possible_class{'no_grade'};
                   1089:         $button=1;
                   1090:     } elsif ($award eq 'ANONYMOUS_CREDIT') {
                   1091:         $message = &mt("Your anonymous submission has been recorded, and credit awarded.");
                   1092:         $css_class=$possible_class{'correct'};
1.301     raeburn  1093:         $button=1;
1.135     albertel 1094:     } elsif ($award eq 'DRAFT') {
1.258     riegler  1095: 	$message = &mt("Copy saved but not submitted.");
1.221     albertel 1096: 	$css_class=$possible_class{'not_charged_try'};
1.135     albertel 1097: 	$button=1;
                   1098:     } elsif ($award eq 'ASSIGNED_SCORE') {
1.144     albertel 1099: 	$message = &mt("A score has been assigned.");
1.221     albertel 1100: 	$css_class=$possible_class{'correct'};
1.135     albertel 1101: 	$button=0;
1.144     albertel 1102:     } elsif ($award eq '') {
1.186     albertel 1103: 	if ($handgrade && $Apache::inputtags::status[-1] eq 'SHOW_ANSWER') {
                   1104: 	    $message = &mt("Nothing submitted.");
1.221     albertel 1105: 	    $css_class=$possible_class{'charged_try'};
1.186     albertel 1106: 	} else {
1.221     albertel 1107: 	    $css_class=$possible_class{'not_charged_try'};
1.186     albertel 1108: 	}
1.144     albertel 1109: 	$button=1;
1.135     albertel 1110:     } else {
                   1111: 	$message = &mt("Unknown message").": $award";
                   1112: 	$button=1;
                   1113:     }
1.209     albertel 1114:     my (undef,undef,$domain,$user)=&Apache::lonnet::whichuser();
1.194     banghart 1115:     foreach my $resid(@Apache::inputtags::response){
                   1116:         if ($Apache::lonhomework::history{"resource.$part.$resid.handback"}) {
1.254     raeburn  1117:             if ($target eq 'tex') {
                   1118:                 $message.= "\\\\\n";
                   1119:             } else {
                   1120:                 $message.='<br />';
                   1121:             }
1.198     albertel 1122: 	    my @files = split(/\s*,\s*/,
                   1123: 			      $Apache::lonhomework::history{"resource.$part.$resid.handback"});
                   1124: 	    my $file_msg;
                   1125: 	    foreach my $file (@files) {
1.254     raeburn  1126:                 if ($target eq 'tex') {
                   1127:                     $file_msg.= "\\\\\n".$file;
                   1128:                 } else {
                   1129:                     $file_msg.= '<br /><a href="/uploaded/'."$domain/$user".'/'.$file.'">'.$file.'</a>';
                   1130:                 }
1.198     albertel 1131: 	    }
                   1132: 	    $message .= &mt('Returned file(s): [_1]',$file_msg);
1.254     raeburn  1133:             if ($target eq 'tex') {
                   1134:                 $message.= "\\\\\n";
                   1135:             } else {
                   1136:                 $message.='<br />';
                   1137:             }
1.198     albertel 1138: 	}
1.194     banghart 1139:     }
                   1140: 
1.233     albertel 1141:     if (&Apache::lonhomework::hide_problem_status()
                   1142: 	&& $Apache::inputtags::status[-1] ne 'SHOW_ANSWER'
                   1143: 	&& &hide_award($award)) {
1.304     raeburn  1144:         $message = &mt("Answer Submitted: Your final submission will be graded after the due date.");
                   1145:         my @interval= &Apache::lonnet::EXT("resource.$part.interval");
                   1146:         if ($interval[0] =~ /\d+/) {
                   1147:             my $first_access=&Apache::lonnet::get_first_access($interval[1]);
                   1148:             if (defined($first_access)) {
                   1149:                 my $due_date= &Apache::lonnet::EXT("resource.$part.duedate");
                   1150:                 unless (($due_date) && ($due_date < $first_access + $interval[0])) { 
                   1151:                     $message = &mt("Answer Submitted: Your final submission will be graded when the time limit is reached.");
                   1152:                 }
                   1153:             }
                   1154:         }
1.221     albertel 1155: 	$css_class=$possible_class{'no_grade'};
1.135     albertel 1156: 	$button=1;
                   1157:     }
1.148     albertel 1158:     if ($Apache::inputtags::status[-1] eq 'SHOW_ANSWER' && 
1.150     albertel 1159: 	!$added_computer_text && $target ne 'tex') {
1.180     albertel 1160: 	$message.= $computer;
1.148     albertel 1161: 	$added_computer_text=1;
1.144     albertel 1162:     }
1.237     www      1163:     if ($Apache::lonhomework::type eq 'practice') {
1.244     raeburn  1164:        if ($target eq 'web') {
                   1165:            $message .= '<br />';
                   1166:        } else {
                   1167:            $message .= ' ';      
                   1168:        }
                   1169:        $message.=&mt('Submissions to practice problems are not permanently recorded.');
1.237     www      1170:     }
1.221     albertel 1171:     return ($button,$css_class,$message,$previousmsg);
1.12      albertel 1172: }
                   1173: 
1.155     albertel 1174: sub markup_unit {
                   1175:     my ($unit,$target)=@_;
                   1176:     if ($target eq 'tex') {
                   1177: 	return '\texttt{'.&Apache::lonxml::latex_special_symbols($unit).'}'; 
                   1178:     } else {
                   1179: 	return "<tt>".$unit."</tt>";
                   1180:     }
                   1181: }
                   1182: 
1.88      albertel 1183: sub removealldata {
1.87      albertel 1184:     my ($id)=@_;
                   1185:     foreach my $key (keys(%Apache::lonhomework::results)) {
                   1186: 	if (($key =~ /^resource\.\Q$id\E\./) && ($key !~ /\.collaborators$/)) {
                   1187: 	    &Apache::lonxml::debug("Removing $key");
                   1188: 	    delete($Apache::lonhomework::results{$key});
                   1189: 	}
                   1190:     }
                   1191: }
                   1192: 
1.142     albertel 1193: sub hidealldata {
                   1194:     my ($id)=@_;
                   1195:     foreach my $key (keys(%Apache::lonhomework::results)) {
                   1196: 	if (($key =~ /^resource\.\Q$id\E\./) && ($key !~ /\.collaborators$/)) {
                   1197: 	    &Apache::lonxml::debug("Hidding $key");
                   1198: 	    my $newkey=$key;
                   1199: 	    $newkey=~s/^(resource\.\Q$id\E\.[^\.]+\.)(.*)$/${1}hidden${2}/;
                   1200: 	    $Apache::lonhomework::results{$newkey}=
                   1201: 		$Apache::lonhomework::results{$key};
                   1202: 	    delete($Apache::lonhomework::results{$key});
                   1203: 	}
                   1204:     }
                   1205: }
                   1206: 
1.12      albertel 1207: sub setgradedata {
1.136     albertel 1208:     my ($award,$msg,$id,$previously_used) = @_;
1.154     albertel 1209:     if ($Apache::lonhomework::scantronmode && 
1.165     albertel 1210: 	&Apache::lonnet::validCODE($env{'form.CODE'})) {
                   1211: 	$Apache::lonhomework::results{"resource.CODE"}=$env{'form.CODE'};
1.154     albertel 1212:     } elsif ($Apache::lonhomework::scantronmode && 
1.165     albertel 1213: 	     $env{'form.CODE'} eq '' &&
1.154     albertel 1214: 	     $Apache::lonhomework::history{"resource.CODE"} ne '') {
                   1215: 	$Apache::lonhomework::results{"resource.CODE"}='';
1.141     albertel 1216:     }
1.154     albertel 1217: 
1.135     albertel 1218:     if (!$Apache::lonhomework::scantronmode &&
                   1219: 	$Apache::inputtags::status['-1'] ne 'CAN_ANSWER' &&
                   1220: 	$Apache::inputtags::status['-1'] ne 'CANNOT_ANSWER') {
                   1221: 	$Apache::lonhomework::results{"resource.$id.afterduedate"}=$award;
1.87      albertel 1222: 	return '';
1.284     www      1223:     } elsif ( $Apache::lonhomework::history{"resource.$id.awarded"} < 1
1.233     albertel 1224: 	      || $Apache::lonhomework::scantronmode 
                   1225: 	      || &Apache::lonhomework::hide_problem_status()  ) {
1.154     albertel 1226:         # the student doesn't already have it correct,
                   1227: 	# or we are in a mode (scantron orno problem status) where a correct 
                   1228:         # can become incorrect
                   1229: 	# handle assignment of tries and solved status
1.135     albertel 1230: 	my $solvemsg;
                   1231: 	if ($Apache::lonhomework::scantronmode) {
                   1232: 	    $solvemsg='correct_by_scantron';
                   1233: 	} else {
                   1234: 	    $solvemsg='correct_by_student';
                   1235: 	}
                   1236: 	if ($Apache::lonhomework::history{"resource.$id.afterduedate"}) {
                   1237: 	    $Apache::lonhomework::results{"resource.$id.afterduedate"}='';
                   1238: 	}
                   1239: 	if ( $award eq 'ASSIGNED_SCORE') {
                   1240: 	    $Apache::lonhomework::results{"resource.$id.tries"} =
                   1241: 		$Apache::lonhomework::history{"resource.$id.tries"} + 1;
                   1242: 	    $Apache::lonhomework::results{"resource.$id.solved"} =
                   1243: 		$solvemsg;
                   1244: 	    my $numawards=scalar(@Apache::inputtags::response);
                   1245: 	    $Apache::lonhomework::results{"resource.$id.awarded"} = 0;
                   1246: 	    foreach my $res (@Apache::inputtags::response) {
1.232     albertel 1247: 		if (defined($Apache::lonhomework::results{"resource.$id.$res.awarded"})) {
                   1248: 		    $Apache::lonhomework::results{"resource.$id.awarded"}+=
                   1249: 			$Apache::lonhomework::results{"resource.$id.$res.awarded"};
                   1250: 		} else {
                   1251: 		    $Apache::lonhomework::results{"resource.$id.awarded"}+=
                   1252: 			&awarddetail_to_awarded($Apache::lonhomework::results{"resource.$id.$res.awarddetail"});
                   1253: 		}
1.135     albertel 1254: 	    }
                   1255: 	    if ($numawards > 0) {
                   1256: 		$Apache::lonhomework::results{"resource.$id.awarded"}/=
                   1257: 		    $numawards;
                   1258: 	    }
                   1259: 	} elsif ( $award eq 'APPROX_ANS' || $award eq 'EXACT_ANS' ) {
                   1260: 	    $Apache::lonhomework::results{"resource.$id.tries"} =
                   1261: 		$Apache::lonhomework::history{"resource.$id.tries"} + 1;
                   1262: 	    $Apache::lonhomework::results{"resource.$id.solved"} =
                   1263: 		$solvemsg;
                   1264: 	    $Apache::lonhomework::results{"resource.$id.awarded"} = '1';
1.261     raeburn  1265:         } elsif ( $award eq 'SUBMITTED_CREDIT' ) {
                   1266:             $Apache::lonhomework::results{"resource.$id.tries"} =
                   1267:                 $Apache::lonhomework::history{"resource.$id.tries"} + 1;
                   1268:             $Apache::lonhomework::results{"resource.$id.solved"} =
                   1269:                 'credit_attempted';
                   1270:             $Apache::lonhomework::results{"resource.$id.awarded"} = '1';
                   1271:         }  elsif ( $award eq 'ANONYMOUS_CREDIT' ) {
                   1272:             $Apache::lonhomework::results{"resource.$id.tries"} =
                   1273:                 $Apache::lonhomework::history{"resource.$id.tries"} + 1;
                   1274:             $Apache::lonhomework::results{"resource.$id.solved"} =
                   1275:                 'credit_attempted';
                   1276:             $Apache::lonhomework::results{"resource.$id.awarded"} = '1';
1.135     albertel 1277: 	} elsif ( $award eq 'INCORRECT' ) {
                   1278: 	    $Apache::lonhomework::results{"resource.$id.tries"} =
                   1279: 		$Apache::lonhomework::history{"resource.$id.tries"} + 1;
1.233     albertel 1280: 	    if (&Apache::lonhomework::hide_problem_status()
                   1281: 		|| $Apache::lonhomework::scantronmode) {
1.135     albertel 1282: 		$Apache::lonhomework::results{"resource.$id.awarded"} = 0;
                   1283: 	    }
                   1284: 	    $Apache::lonhomework::results{"resource.$id.solved"} =
                   1285: 		'incorrect_attempted';
                   1286: 	} elsif ( $award eq 'SUBMITTED' ) {
                   1287: 	    $Apache::lonhomework::results{"resource.$id.tries"} =
                   1288: 		$Apache::lonhomework::history{"resource.$id.tries"} + 1;
                   1289: 	    $Apache::lonhomework::results{"resource.$id.solved"} =
                   1290: 		'ungraded_attempted';
1.261     raeburn  1291:         }  elsif ( $award eq 'ANONYMOUS' ) {
                   1292:             $Apache::lonhomework::results{"resource.$id.tries"} =
                   1293:                 $Apache::lonhomework::history{"resource.$id.tries"} + 1;
                   1294:             $Apache::lonhomework::results{"resource.$id.solved"} =
                   1295:                 'ungraded_attempted';
1.135     albertel 1296: 	} elsif ( $award eq 'DRAFT' ) {
                   1297: 	    $Apache::lonhomework::results{"resource.$id.solved"} = '';
                   1298: 	} elsif ( $award eq 'NO_RESPONSE' ) {
                   1299: 	    #no real response so delete any data that got stored
1.129     albertel 1300: 	    &removealldata($id);
                   1301: 	    return '';
                   1302: 	} else {
1.135     albertel 1303: 	    $Apache::lonhomework::results{"resource.$id.solved"} =
                   1304: 		'incorrect_attempted';
1.233     albertel 1305: 	    if (&Apache::lonhomework::show_no_problem_status()
                   1306: 		|| $Apache::lonhomework::scantronmode) {
1.135     albertel 1307: 		$Apache::lonhomework::results{"resource.$id.tries"} =
                   1308: 		    $Apache::lonhomework::history{"resource.$id.tries"} + 1;
                   1309: 		$Apache::lonhomework::results{"resource.$id.awarded"} = 0;
                   1310: 	    }
1.233     albertel 1311: 
                   1312: 	    if (&Apache::lonhomework::show_some_problem_status()) {
                   1313: 		# clear out the awarded if they had gotten it wrong/right
                   1314: 		# and are now in an error mode	
                   1315: 		$Apache::lonhomework::results{"resource.$id.awarded"} = '';
                   1316: 	    }
1.135     albertel 1317: 	}
1.136     albertel 1318: 	if (defined($msg)) {
                   1319: 	    $Apache::lonhomework::results{"resource.$id.awardmsg"} = $msg;
                   1320: 	}
1.135     albertel 1321: 	# did either of the overall awards chage? If so ignore the 
                   1322: 	# previous check
                   1323: 	if (($Apache::lonhomework::results{"resource.$id.awarded"} eq
                   1324: 	     $Apache::lonhomework::history{"resource.$id.awarded"}) &&
                   1325: 	    ($Apache::lonhomework::results{"resource.$id.solved"} eq
                   1326: 	     $Apache::lonhomework::history{"resource.$id.solved"})) {
                   1327: 	    # check if this was a previous submission if it was delete the
                   1328: 	    # unneeded data and update the previously_used attribute
                   1329: 	    if ( $previously_used eq 'PREVIOUSLY_USED') {
1.233     albertel 1330: 		if (&Apache::lonhomework::show_problem_status()) {
1.135     albertel 1331: 		    delete($Apache::lonhomework::results{"resource.$id.tries"});
                   1332: 		    $Apache::lonhomework::results{"resource.$id.previous"} = '1';
                   1333: 		}
                   1334: 	    } elsif ( $previously_used eq 'PREVIOUSLY_LAST') {
                   1335: 		#delete all data as they student didn't do anything, but save
                   1336: 		#the list of collaborators.
                   1337: 		&removealldata($id);
                   1338: 		#and since they didn't do anything we were never here
                   1339: 		return '';
                   1340: 	    } else {
                   1341: 		$Apache::lonhomework::results{"resource.$id.previous"} = '0';
                   1342: 	    }
1.101     albertel 1343: 	}
1.283     www      1344:     } elsif ( $Apache::lonhomework::history{"resource.$id.awarded"} == 1 ) {
1.135     albertel 1345: 	#delete all data as they student already has it correct
                   1346: 	&removealldata($id);
                   1347: 	#and since they didn't do anything we were never here
                   1348: 	return '';
1.40      albertel 1349:     }
1.135     albertel 1350:     $Apache::lonhomework::results{"resource.$id.award"} = $award;
1.184     albertel 1351:     if ($award eq 'SUBMITTED') {
                   1352: 	&Apache::response::add_to_gradingqueue();
                   1353:     }
1.288     www      1354:     $Apache::lonhomework::results{"resource.$id.type"} = $Apache::lonhomework::type;
1.289     www      1355:     $Apache::lonhomework::results{"resource.$id.duedate"} = &Apache::lonnet::EXT("resource.$id.duedate");
                   1356:     $Apache::lonhomework::results{"resource.$id.hinttries"} = &Apache::lonnet::EXT("resource.$id.hinttries");
1.290     www      1357:     $Apache::lonhomework::results{"resourse.$id.version"} = &Apache::lonnet::usedversion(); 
1.10      albertel 1358: }
                   1359: 
1.219     albertel 1360: sub find_which_previous {
                   1361:     my ($version) = @_;
                   1362:     my $part = $Apache::inputtags::part;
                   1363:     my (@previous_version);
                   1364:     foreach my $resp (@Apache::inputtags::response) {
                   1365: 	my $key = "$version:resource.$part.$resp.submission";
                   1366: 	my $submission = $Apache::lonhomework::history{$key};
                   1367: 	my %previous = &Apache::response::check_for_previous($submission,
                   1368: 							     $part,$resp,
                   1369: 							     $version);
                   1370: 	push(@previous_version,$previous{'version'});
                   1371:     }
                   1372:     return &previous_match(\@previous_version,
                   1373: 			   scalar(@Apache::inputtags::response));
                   1374: }
                   1375: 
                   1376: sub previous_match {
                   1377:     my ($previous_array,$count) = @_;
                   1378:     my $match = 0;
                   1379:     my @matches;
                   1380:     foreach my $versionar (@$previous_array) {
                   1381: 	foreach my $version (@$versionar) {
                   1382: 	    $matches[$version]++;
                   1383: 	}
                   1384:     }
                   1385:     my $which=0;
                   1386:     foreach my $elem (@matches) {
                   1387: 	if ($elem eq $count) {
                   1388: 	    $match=1;
                   1389: 	    last;
                   1390: 	}
                   1391: 	$which++;
                   1392:     }
                   1393:     return ($match,$which);
                   1394: }
                   1395: 
1.9       albertel 1396: sub grade {
1.135     albertel 1397:     my ($target) = @_;
                   1398:     my $id = $Apache::inputtags::part;
                   1399:     my $response='';
1.165     albertel 1400:     if ( defined $env{'form.submitted'}) {
1.136     albertel 1401: 	my (@awards,@msgs);
1.135     albertel 1402: 	foreach $response (@Apache::inputtags::response) {
                   1403: 	    &Apache::lonxml::debug("looking for response.$id.$response.awarddetail");
                   1404: 	    my $value=$Apache::lonhomework::results{"resource.$id.$response.awarddetail"};
                   1405: 	    &Apache::lonxml::debug("keeping $value from $response for $id");
                   1406: 	    push (@awards,$value);
1.136     albertel 1407: 	    $value=$Apache::lonhomework::results{"resource.$id.$response.awardmsg"};
                   1408: 	    &Apache::lonxml::debug("got message $value from $response for $id");
                   1409: 	    push (@msgs,$value);
1.135     albertel 1410: 	}
1.232     albertel 1411: 	my ($finalaward,$msg) = 
                   1412: 	    &finalizeawards(\@awards,\@msgs,undef,undef,
                   1413: 			    $Apache::lonhomework::scantronmode);
1.135     albertel 1414: 	my $previously_used;
                   1415: 	if ( $#Apache::inputtags::previous eq $#awards ) {
1.219     albertel 1416: 	    my ($match) =
                   1417: 		&previous_match(\@Apache::inputtags::previous_version,
                   1418: 				scalar(@Apache::inputtags::response));
1.244     raeburn  1419: 
1.135     albertel 1420: 	    if ($match) {
                   1421: 		$previously_used = 'PREVIOUSLY_LAST';
                   1422: 		foreach my $value (@Apache::inputtags::previous) {
                   1423: 		    if ($value eq 'PREVIOUSLY_USED' ) {
                   1424: 			$previously_used = $value;
                   1425: 			last;
                   1426: 		    }
1.75      albertel 1427: 		}
                   1428: 	    }
1.43      albertel 1429: 	}
1.136     albertel 1430: 	&Apache::lonxml::debug("final award $finalaward, $previously_used, message $msg");
                   1431: 	&setgradedata($finalaward,$msg,$id,$previously_used);
1.43      albertel 1432:     }
1.135     albertel 1433:     return '';
1.1       albertel 1434: }
                   1435: 
1.217     albertel 1436: sub get_grade_messages {
1.282     www      1437:     my ($id,$prefix,$target,$status,$nocorrect) = @_;
                   1438: # nocorrect suppresses "Computer's answer now shown above"
1.217     albertel 1439:     my ($message,$latemessage,$trystr,$previousmsg);
                   1440:     my $showbutton = 1;
                   1441: 
                   1442:     my $award = $Apache::lonhomework::history{"$prefix.award"};
                   1443:     my $awarded = $Apache::lonhomework::history{"$prefix.awarded"};
                   1444:     my $solved = $Apache::lonhomework::history{"$prefix.solved"};
                   1445:     my $previous = $Apache::lonhomework::history{"$prefix.previous"};
                   1446:     my $awardmsg = $Apache::lonhomework::history{"$prefix.awardmsg"};
                   1447:     &Apache::lonxml::debug("Found Award |$award|$solved|$awardmsg");
                   1448:     if ( $award ne '' || $solved ne '' || $status eq 'SHOW_ANSWER') {
                   1449: 	&Apache::lonxml::debug('Getting message');
1.221     albertel 1450: 	($showbutton,my $css_class,$message,$previousmsg) =
1.217     albertel 1451: 	    &decideoutput($award,$awarded,$awardmsg,$solved,$previous,
1.282     www      1452: 			  $target,(($status eq 'CAN_ANSWER') || $nocorrect));
1.217     albertel 1453: 	if ($target eq 'tex') {
                   1454: 	    $message='\vskip 2 mm '.$message.' ';
                   1455: 	} else {
1.221     albertel 1456: 	    $message="<td class=\"$css_class\">$message</td>";
1.217     albertel 1457: 	    if ($previousmsg) {
1.221     albertel 1458: 		$previousmsg="<td class=\"LC_answer_previous\">$previousmsg</td>";
1.217     albertel 1459: 	    }
                   1460: 	}
                   1461:     }
                   1462:     my $tries = $Apache::lonhomework::history{"$prefix.tries"};
                   1463:     my $maxtries = &Apache::lonnet::EXT("resource.$id.maxtries");
                   1464:     &Apache::lonxml::debug("got maxtries of :$maxtries:");
                   1465:     #if tries are set to negative turn off the Tries/Button and messages
                   1466:     if (defined($maxtries) && $maxtries < 0) { return ''; }
                   1467:     if ( $tries eq '' ) { $tries = '0'; }
                   1468:     if ( $maxtries eq '' ) { $maxtries = '2'; } 
                   1469:     if ( $maxtries eq 'con_lost' ) { $maxtries = '0'; } 
1.292     christia 1470:     my $tries_text= &get_tries_text();
1.217     albertel 1471:     if ($showbutton) {
                   1472: 	if ($target eq 'tex') {
                   1473: 	    if ($env{'request.state'} ne "construct"
                   1474: 		&& $Apache::lonhomework::type ne 'exam'
                   1475: 		&& $env{'form.suppress_tries'} ne 'yes') {
1.292     christia 1476: 		$trystr ='{\vskip 1 mm \small '
                   1477:                         .&mt('[_1]'.$tries_text.'[_2] [_3]'
                   1478: 				,'\textit{','}',$tries.'/'.$maxtries ) 
                   1479:                         .'} \vskip 2 mm';
1.217     albertel 1480: 	    } else {
                   1481: 		$trystr = '\vskip 0 mm ';
                   1482: 	    }
                   1483: 	} else {
1.292     christia 1484: 	    my $trial =$tries;
1.217     albertel 1485: 	    if ($Apache::lonhomework::parsing_a_task) {
                   1486: 	    } elsif($env{'request.state'} ne 'construct') {
1.292     christia 1487: 		$trial.="/".&Apache::lonhtmlcommon::direct_parm_link($maxtries,$env{'request.symb'},'maxtries',$id,$target);
1.217     albertel 1488: 	    } else {
                   1489: 		if (defined($Apache::inputtags::params{'maxtries'})) {
1.292     christia 1490: 		    $trial.="/".$Apache::inputtags::params{'maxtries'};
1.217     albertel 1491: 		}
                   1492: 	    }
1.295     raeburn  1493: 	    $trystr = '<td><span class="LC_nobreak">'.&mt($tries_text.' [_1]',$trial).'</span></td>';
1.217     albertel 1494: 	}
                   1495:     }
1.221     albertel 1496: 
1.217     albertel 1497:     if ($Apache::lonhomework::history{"$prefix.afterduedate"}) {
                   1498: 	#last submissions was after due date
                   1499: 	$latemessage=&mt(' The last submission was after the Due Date ');;
                   1500: 	if ($target eq 'web') {
1.221     albertel 1501: 	    $latemessage='<td class="LC_answer_late">'.$latemessage.'</td>';
1.217     albertel 1502: 	}
                   1503:     }
                   1504:     return ($previousmsg,$latemessage,$message,$trystr,$showbutton);
                   1505: }
                   1506: 
1.11      albertel 1507: sub gradestatus {
1.223     albertel 1508:     my ($id,$target,$no_previous) = @_;
1.135     albertel 1509:     my $showbutton = 1;
                   1510:     my $message = '';
                   1511:     my $latemessage = '';
                   1512:     my $trystr='';
                   1513:     my $button='';
                   1514:     my $previousmsg='';
                   1515: 
                   1516:     my $status = $Apache::inputtags::status['-1'];
                   1517:     &Apache::lonxml::debug("gradestatus has :$status:");
1.183     albertel 1518:     if ( $status ne 'CLOSED' 
                   1519: 	 && $status ne 'UNAVAILABLE' 
                   1520: 	 && $status ne 'INVALID_ACCESS' 
                   1521: 	 && $status ne 'NEEDS_CHECKIN' 
1.300     raeburn  1522: 	 && $status ne 'NOT_IN_A_SLOT'
                   1523:          && $status ne 'RESERVABLE'
                   1524:          && $status ne 'RESERVABLE_LATER'
                   1525:          && $status ne 'NOTRESERVABLE') {
1.217     albertel 1526: 
1.305     raeburn  1527: 	if ($status eq 'SHOW_ANSWER') {
                   1528:             $showbutton = 0;
                   1529:         }
                   1530: 
1.217     albertel 1531: 	($previousmsg,$latemessage,$message,$trystr) =
                   1532: 	    &get_grade_messages($id,"resource.$id",$target,$status,
                   1533: 				$showbutton);
1.305     raeburn  1534: 	if ($status eq 'CANNOT_ANSWER') {
1.217     albertel 1535: 	    $showbutton = 0;
1.164     albertel 1536: 	}
1.218     albertel 1537: 	if ( $status eq 'SHOW_ANSWER') {
                   1538: 	    undef($previousmsg);
                   1539: 	}
1.135     albertel 1540: 	if ( $showbutton ) { 
                   1541: 	    if ($target ne 'tex') {
1.230     albertel 1542: 		$button = 
1.262     www      1543:             '<input onmouseup="javascript:setSubmittedPart(\''.$id.'\');this.form.action+=\'#'.&escape($id).'\';"
1.260     droeschl 1544:                     type="submit" name="submit_'.$id.'"
                   1545:                     value="'.&mt('Submit Answer').'" />';
1.135     albertel 1546: 	    }
                   1547: 	}
1.217     albertel 1548: 
1.135     albertel 1549:     }
                   1550:     my $output= $previousmsg.$latemessage.$message.$trystr;
                   1551:     if ($output =~ /^\s*$/) {
                   1552: 	return $button;
1.63      sakharuk 1553:     } else {
1.135     albertel 1554: 	if ($target eq 'tex') {
                   1555: 	    return $button.' \vskip 0 mm '.$output.' ';
                   1556: 	} else {
1.223     albertel 1557: 	    $output =
                   1558: 		'<table><tr><td>'.$button.'</td>'.$output;
                   1559: 	    if (!$no_previous) {
                   1560: 		$output.='<td>'.&previous_tries($id,$target).'</td>';
                   1561: 	    }
                   1562: 	    $output.= '</tr></table>';
                   1563: 	    return $output;
1.135     albertel 1564: 	}
1.63      sakharuk 1565:     }
1.11      albertel 1566: }
1.217     albertel 1567: 
                   1568: sub previous_tries {
                   1569:     my ($id,$target) = @_;
                   1570:     my $output;
                   1571:     my $status = $Apache::inputtags::status['-1'];
1.219     albertel 1572: 
                   1573:     my $count;
                   1574:     my %count_lookup;
1.274     raeburn  1575:     my $lastrndseed;
1.219     albertel 1576: 
1.217     albertel 1577:     foreach my $i (1..$Apache::lonhomework::history{'version'}) {
                   1578: 	my $prefix = $i.":resource.$id";
1.263     raeburn  1579:         my $is_anon; 
                   1580:         if (defined($env{'form.grade_symb'})) {
                   1581:             if (($Apache::lonhomework::history{"$prefix.type"} eq 'anonsurvey') || 
                   1582:                 ($Apache::lonhomework::history{"$prefix.type"} eq 'anonsurveycred')) {
                   1583:                 $is_anon = 1;
                   1584:             }
                   1585:         }
1.217     albertel 1586: 	next if (!exists($Apache::lonhomework::history{"$prefix.award"}));
1.219     albertel 1587: 	$count++;
                   1588: 	$count_lookup{$i} = $count;
1.274     raeburn  1589:         my $curr_rndseed = $Apache::lonhomework::history{"$prefix.rndseed"};
1.217     albertel 1590: 	my ($previousmsg,$latemessage,$message,$trystr);
                   1591: 
                   1592: 	($previousmsg,$latemessage,$message,$trystr) =
                   1593: 	    &get_grade_messages($id,"$prefix",$target,$status);
                   1594: 
1.219     albertel 1595: 	if ($previousmsg ne '') {
                   1596: 	    my ($match,$which) = &find_which_previous($i);
                   1597: 	    $message=$previousmsg;
                   1598: 	    my $previous = $count_lookup{$which};
1.226     albertel 1599: 	    $message =~ s{(</td>)}{ as submission \# $previous $1};
1.221     albertel 1600: 	} elsif ($Apache::lonhomework::history{"$prefix.tries"}) {
1.233     albertel 1601: 	    if (!(&Apache::lonhomework::hide_problem_status()
1.225     albertel 1602: 		  && $Apache::inputtags::status[-1] ne 'SHOW_ANSWER')
                   1603: 		&& $Apache::lonhomework::history{"$prefix.solved"} =~/^correct/
                   1604: 		) {
                   1605: 		
1.238     bisitz   1606:                 my $txt_correct = &mt('Correct');
1.279     raeburn  1607:                 my $awarded = $Apache::lonhomework::history{"$prefix.awarded"};
                   1608:                 if ($awarded < 1 && $awarded > 0) {
1.280     raeburn  1609:                     $txt_correct=&mt('Partially Correct');
1.279     raeburn  1610:                 } elsif ($awarded < 1) {
                   1611:                     if ($awarded eq '') {
                   1612:                         $txt_correct='';
                   1613:                     } else {
                   1614:                         $txt_correct=&mt('Incorrect');
                   1615:                     }
                   1616:                 }
1.221     albertel 1617: 		$message =~ s{(<td.*?>)(.*?)(</td>)}
1.238     bisitz   1618:                              {$1 <strong>$txt_correct</strong>. $3}s;
1.221     albertel 1619: 	    }
1.238     bisitz   1620:             my $trystr = "(".&mt('Try [_1]',$Apache::lonhomework::history{"$prefix.tries"}).")";
1.294     raeburn  1621:             if (($curr_rndseed || $lastrndseed) && ($i > 1)) {
1.274     raeburn  1622:                 if ($curr_rndseed ne $lastrndseed) {
                   1623:                     $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>';
                   1624:                 }
                   1625:             } 
1.221     albertel 1626: 	    $message =~ s{(</td>)}{ $trystr $1};
1.219     albertel 1627: 	}
1.221     albertel 1628: 	my ($class) = ($message =~ m{<td.*class="([^"]*)"}); #"
                   1629: 	$message =~ s{(<td.*?>)}{<td>};
                   1630: 	
1.219     albertel 1631: 
1.221     albertel 1632: 	$output.='<tr class="'.$class.'">';
1.223     albertel 1633: 	$output.='<td align="center">'.$count.'</td>';
1.219     albertel 1634: 	$output.=$message;
1.217     albertel 1635: 
                   1636: 	foreach my $resid (@Apache::inputtags::response) {
                   1637: 	    my $prefix = $prefix.".$resid";
                   1638: 	    if (exists($Apache::lonhomework::history{"$prefix.submission"})) {
                   1639: 		my $submission =
                   1640: 		    $Apache::inputtags::submission_display{"$prefix.submission"};
                   1641: 		if (!defined($submission)) {
                   1642: 		    $submission = 
                   1643: 			$Apache::lonhomework::history{"$prefix.submission"};
                   1644: 		}
1.263     raeburn  1645:                 if ($is_anon) {
                   1646:                     $output.='<td>'.&mt('(only shown to submitter)').'</td>';
                   1647:                 } else {
                   1648: 		    $output.='<td>'.$submission.'</td>';
                   1649:                 }
1.217     albertel 1650: 	    } else {
                   1651: 		$output.='<td></td>';
                   1652: 	    }
                   1653: 	}
1.221     albertel 1654: 	$output.=&Apache::loncommon::end_data_table_row()."\n";
1.274     raeburn  1655:         $lastrndseed = $curr_rndseed;
1.217     albertel 1656:     }
                   1657:     return if ($output eq '');
1.219     albertel 1658:     my $headers = 
1.222     albertel 1659: 	'<tr>'.'<th>'.&mt('Submission #').'</th><th>'.&mt('Try').
1.219     albertel 1660: 	'</th><th colspan="'.scalar(@Apache::inputtags::response).'">'.
                   1661: 	&mt('Submitted Answer').'</th>';
1.298     www      1662:     $output ='<table class="LC_prior_tries">'.$headers.$output.'</table>';
1.226     albertel 1663: 
1.263     raeburn  1664:     my $tries_text = &get_tries_text('link');
1.231     albertel 1665:     my $prefix = $env{'form.request.prefix'};
                   1666:     $prefix =~ tr{.}{_};
                   1667:     my $function_name = "LONCAPA_previous_tries_".$prefix.
1.234     albertel 1668: 	$Apache::lonxml::curdepth.'_'.$env{'form.counter'};
1.298     www      1669:     my $result = &Apache::loncommon::modal_adhoc_window($function_name,420,410,$output,&mt($tries_text))."<br />";
1.217     albertel 1670:     return $result;
                   1671: }
                   1672: 
1.263     raeburn  1673: sub get_tries_text {
                   1674:     my ($context) = @_;
                   1675:     my $tries_text;
                   1676:     if ($context eq 'link') {
                   1677:         $tries_text = 'Previous Tries';
                   1678:     } else {
                   1679:         $tries_text = 'Tries';
                   1680:     }
                   1681:     if ( $Apache::lonhomework::type eq 'survey' ||
                   1682:          $Apache::lonhomework::type eq 'surveycred' ||
                   1683:          $Apache::lonhomework::type eq 'anonsurvey' ||
                   1684:          $Apache::lonhomework::type eq 'anonsurveycred' ||
                   1685:          $Apache::lonhomework::parsing_a_task) {
                   1686:         if ($context eq 'link') {
                   1687:             $tries_text = 'Previous Submissions';
                   1688:         } else {
                   1689:             $tries_text = 'Submissions';
                   1690:         }
                   1691:     }
                   1692:     return $tries_text;
                   1693: }
                   1694: 
1.1       albertel 1695: 1;
                   1696: __END__
1.249     jms      1697: 
                   1698: =pod
                   1699: 
                   1700: =back
                   1701: 
                   1702: =cut
1.43      albertel 1703:  

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