Annotation of loncom/homework/optionresponse.pm, revision 1.173
1.46 sakharuk 1: # LearningOnline Network with CAPA
1.22 albertel 2: # option list style responses
1.27 albertel 3: #
1.173 ! raeburn 4: # $Id: optionresponse.pm,v 1.172 2010/09/05 20:46:58 www Exp $
1.27 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/
27: #
1.154 jms 28:
29:
30:
31:
32:
1.1 albertel 33: package Apache::optionresponse;
34: use strict;
1.103 albertel 35: use Apache::response();
36: use Apache::lonlocal;
1.125 albertel 37: use Apache::lonnet;
1.1 albertel 38:
1.31 harris41 39: BEGIN {
1.1 albertel 40: &Apache::lonxml::register('Apache::optionresponse',('optionresponse'));
41: }
42:
43: sub start_optionresponse {
1.22 albertel 44: my ($target,$token,$tagstack,$parstack,$parser,$safeeval,$style)=@_;
45: my $result='';
1.29 albertel 46: #when in a option response use these
1.112 sakharuk 47: &Apache::lonxml::register('Apache::optionresponse',('foilgroup','foil','conceptgroup','drawoptionlist'));
1.22 albertel 48: push (@Apache::lonxml::namespace,'optionresponse');
49: my $id = &Apache::response::start_response($parstack,$safeeval);
1.57 albertel 50: %Apache::hint::option=();
1.103 albertel 51: undef(%Apache::response::foilnames);
1.22 albertel 52: if ($target eq 'edit') {
1.153 bisitz 53: $result.=&Apache::edit::start_table($token)
54: .'<tr><td><span class="LC_nobreak">'.&mt('Multiple Option Response Question').'</span> '
55: .&Apache::loncommon::help_open_topic('Option_Response_Problems')."</td>"
56: .'<td><span class="LC_nobreak">'.&mt('Delete?').' '
57: .&Apache::edit::deletelist($target,$token)
58: .'</span></td>'
59: ."<td> "
60: .&Apache::edit::end_row()
61: .&Apache::edit::start_spanning_row()
62: ."\n";
1.48 albertel 63: $result.=&Apache::edit::text_arg('Max Number Of Shown Foils:','max',
64: $token,'4').
1.153 bisitz 65: &Apache::edit::select_arg('Randomize Foil Order:','randomize',
1.48 albertel 66: ['yes','no'],$token).
1.108 albertel 67: &Apache::edit::select_arg(&mt('Display of options when printed'),'TeXlayout',
1.157 raeburn 68: [['horizontal','Normal list'],
69: ['vertical','Listed in a vertical column']],$token).
1.48 albertel 70: &Apache::edit::end_row().&Apache::edit::start_spanning_row();
1.34 albertel 71: } elsif ($target eq 'modified') {
1.23 albertel 72: my $constructtag=&Apache::edit::get_new_args($token,$parstack,
1.108 albertel 73: $safeeval,'max','randomize',
74: 'TeXlayout');
1.22 albertel 75: if ($constructtag) { $result = &Apache::edit::rebuild_tag($token); }
1.34 albertel 76: } elsif ($target eq 'meta') {
1.23 albertel 77: $result=&Apache::response::meta_package_write('optionresponse');
1.34 albertel 78: } elsif ($target eq 'analyze') {
1.93 albertel 79: my $part_id="$Apache::inputtags::part.$id";
1.149 raeburn 80: $Apache::lonhomework::analyze{"$part_id.type"} = 'optionresponse';
1.34 albertel 81: push (@{ $Apache::lonhomework::analyze{"parts"} },$part_id);
1.148 raeburn 82: push (@{ $Apache::lonhomework::analyze{"$part_id.bubble_lines"} }, 1);
1.145 foxr 83:
1.22 albertel 84: }
85: return $result;
1.1 albertel 86: }
87:
88: sub end_optionresponse {
1.22 albertel 89: my ($target,$token,$tagstack,$parstack,$parser,$safeeval,$style)=@_;
90: &Apache::response::end_response;
91: pop @Apache::lonxml::namespace;
1.112 sakharuk 92: &Apache::lonxml::deregister('Apache::optionresponse',('foilgroup','foil','conceptgroup','drawoptionlist'));
1.22 albertel 93: my $result;
94: if ($target eq 'edit') { $result=&Apache::edit::end_table(); }
1.103 albertel 95: undef(%Apache::response::foilnames);
1.22 albertel 96: return $result;
1.1 albertel 97: }
98:
1.44 albertel 99: %Apache::response::foilgroup=();
1.1 albertel 100: sub start_foilgroup {
1.22 albertel 101: my ($target,$token,$tagstack,$parstack,$parser,$safeeval,$style)=@_;
102:
103: my $result='';
1.44 albertel 104: %Apache::response::foilgroup=();
1.22 albertel 105: $Apache::optionresponse::conceptgroup=0;
1.173 ! raeburn 106: &Apache::response::pushrandomnumber(undef,$target);
1.22 albertel 107: if ($target eq 'edit') {
108: my $optionlist="<option></option>\n";
109: my $option;
110: my @opt;
111: eval '@opt ='. &Apache::lonxml::get_param('options',$parstack,$safeeval);
112: my $count=1;
113: foreach $option (@opt) {
114: $optionlist.="<option value=\"$count\">$option</option>\n";
115: $count++;
116: }
117: my $insertlist=&Apache::edit::insertlist($target,$token);
118: $result.=&Apache::edit::start_table($token);
119: $result.= (<<ENDTABLE);
120: <tr><td>Select Options</td>
1.13 albertel 121: <td>
122: Add new Option: <input type="text" name="$Apache::lonxml::curdepth.options" />
123: </td>
124: <td>Delete an Option:
125: <select name="$Apache::lonxml::curdepth.deleteopt">$optionlist</select>
1.162 www 126: </td>
1.13 albertel 127: ENDTABLE
1.162 www 128: $result.= '<td>'.&Apache::edit::checked_arg('Print options:','texoptions',
1.132 albertel 129: [ ['nochoice','Don\'t show option list'] ]
1.162 www 130: ,$token).'</td>';
131: $result.= '<td><label>'.&mt('Two-option checkboxes for:').
132: '<select name="checkboxvalue_'.$Apache::lonxml::curdepth.'">';
133: foreach $option (('',@opt)) {
134: $result.='<option value="'.$option.'"';
135: if ($option eq &Apache::lonxml::get_param('checkboxvalue',$parstack,$safeeval)) {
136: $result.=' selected="selected"';
137: }
138: $result.='>'.$option.'</option>';
139: }
1.172 www 140: $result.='</select></label>';
141: $result.=&Apache::edit::checked_arg('Checkbox options:','checkboxoptions',
142: [ ['nochoice','Don\'t show option list'] ]
143: ,$token).'</td>';
1.30 matthew 144: $result.= &Apache::edit::end_row();
145: $result.= &Apache::edit::start_spanning_row();
146: $result.= $insertlist.'<br />';
1.22 albertel 147: }
148: if ($target eq 'modified') {
149: my @options;
150: my $optchanged=0;
151: eval '@options ='.&Apache::lonxml::get_param('options',$parstack,$safeeval);
1.125 albertel 152: if ($env{"form.$Apache::lonxml::curdepth.deleteopt"}) {
153: my $delopt=$env{"form.$Apache::lonxml::curdepth.deleteopt"};
1.22 albertel 154: &Apache::lonxml::debug("Deleting :$delopt:");
155: splice(@options,$delopt-1,1);
156: $optchanged=1;
157: }
1.125 albertel 158: if ($env{"form.$Apache::lonxml::curdepth.options"}) {
159: my $newopt = $env{"form.$Apache::lonxml::curdepth.options"};
1.22 albertel 160: if ($options[0]) {
161: push(@options,$newopt);
162: } else {
163: $options[0]=$newopt;
164: }
165: $optchanged=1;
166: }
1.132 albertel 167: my $rebuildtag = &Apache::edit::get_new_args($token,$parstack,$safeeval,
1.172 www 168: 'texoptions','checkboxvalue','checkboxoptions');
1.132 albertel 169: if ($optchanged || $rebuildtag ) {
1.22 albertel 170: $result = "<foilgroup options=\"(";
171: foreach my $option (@options) {
1.41 albertel 172: $option=~s/\'/\\\'/g;
1.22 albertel 173: &Apache::lonxml::debug("adding option :$option:");
174: $result .="'".$option."',";
175: }
176: chop $result;
1.132 albertel 177: $result.=')" ';
178: $result .= 'texoptions="'.$token->[2]{'texoptions'}.'" ';
1.172 www 179: $result .= 'checkboxoptions="'.$token->[2]{'checkboxoptions'}.'" ';
1.162 www 180: $result .= 'checkboxvalue="'.$token->[2]{'checkboxvalue'}.'"';
1.132 albertel 181: $result .= '>';
1.22 albertel 182: } # else nothing changed so just use the default mechanism
183: }
1.68 sakharuk 184: if ($target eq 'tex' and $Apache::lonhomework::type ne 'exam') {
1.152 onken 185: if($env{'form.pdfFormFields'} ne 'yes') {
1.167 raeburn 186: $result .= ' \begin{itemize} ';
1.152 onken 187: } else {
188: $result .= "\\\\";
189: }
1.42 sakharuk 190: }
1.22 albertel 191: return $result;
1.1 albertel 192: }
193:
194: sub end_foilgroup {
1.22 albertel 195: my ($target,$token,$tagstack,$parstack,$parser,$safeeval,$style)=@_;
196:
197: my $result;
1.94 albertel 198: if ($target eq 'grade' || $target eq 'web' || $target eq 'answer' ||
199: $target eq 'tex' || $target eq 'analyze') {
1.81 sakharuk 200: my $tex_option_switch=&Apache::lonxml::get_param('texoptions',$parstack,$safeeval);
1.22 albertel 201: my $name;
202: my @opt;
203: eval '@opt ='.&Apache::lonxml::get_param('options',$parstack,$safeeval);
1.126 albertel 204: &Apache::lonxml::debug("options:".join(':',@opt));
205:
1.108 albertel 206: my $TeXlayout=&Apache::lonxml::get_param('TeXlayout',$parstack,$safeeval,
207: -2,0);
1.161 www 208: my $checkboxvalue=&Apache::lonxml::get_param('checkboxvalue',$parstack,$safeeval);
1.172 www 209: my $checkboxchoices=(&Apache::lonxml::get_param('checkboxoptions',$parstack,$safeeval) ne 'nochoice');
1.81 sakharuk 210: if ($target eq 'tex' && $tex_option_switch eq 'nochoice') {@opt=();}
1.22 albertel 211: &Apache::lonxml::debug("Options are $#opt");
1.48 albertel 212: my $max = &Apache::lonxml::get_param('max',$parstack,$safeeval,'-2');
213: my $randomize = &Apache::lonxml::get_param('randomize',$parstack,
214: $safeeval,'-2');
1.32 sakharuk 215: if ($target eq 'web' || $target eq 'tex') {
1.172 www 216: $result.=&displayfoils($target,$max,$randomize,$TeXlayout,$checkboxvalue,$checkboxchoices,@opt);
1.137 albertel 217: $Apache::lonxml::post_evaluate=0;
1.25 albertel 218: } elsif ( $target eq 'answer') {
1.48 albertel 219: $result.=&displayanswers($max,$randomize,@opt);
1.136 foxr 220:
1.34 albertel 221: } elsif ( $target eq 'analyze') {
1.93 albertel 222: my @shown = &whichfoils($max,$randomize);
1.94 albertel 223: &Apache::response::analyze_store_foilgroup(\@shown,
224: ['text','value','location']);
1.93 albertel 225: my $part_id="$Apache::inputtags::part.$Apache::inputtags::response[-1]";
226: push (@{ $Apache::lonhomework::analyze{"$part_id.options"} },@opt);
1.22 albertel 227: } elsif ( $target eq 'grade') {
1.124 albertel 228: if ( &Apache::response::submitted()) {
1.48 albertel 229: my @whichopt = &whichfoils($max,$randomize);
1.22 albertel 230: my $temp=1;my $name;
1.26 albertel 231: my %responsehash;
1.57 albertel 232: my %grade;
1.22 albertel 233: my $right=0;
234: my $wrong=0;
235: my $ignored=0;
236: foreach $name (@whichopt) {
1.74 albertel 237: my $response=&Apache::response::getresponse($temp);
1.125 albertel 238: if ($env{'form.submitted'} eq 'scantron' && $response=~/\S/) {
1.74 albertel 239: $response = $opt[$response];
240: }
1.22 albertel 241: if ( $response =~ /[^\s]/) {
1.96 albertel 242: $responsehash{$name}=$response;
1.22 albertel 243: my $value=$Apache::response::foilgroup{$name.'.value'};
1.34 albertel 244: &Apache::lonxml::debug("submitted a $response for $value<br />\n");
1.57 albertel 245: if ($value eq $response) {
246: $grade{$name}='1'; $right++;
247: } else {
248: $grade{$name}='0'; $wrong++;
249: }
1.22 albertel 250: } else {
251: $ignored++;
252: }
253: $temp++;
254: }
1.28 albertel 255: my $part=$Apache::inputtags::part;
1.22 albertel 256: my $id = $Apache::inputtags::response['-1'];
1.28 albertel 257: my $responsestr=&Apache::lonnet::hash2str(%responsehash);
1.57 albertel 258: my $gradestr =&Apache::lonnet::hash2str(%grade);
1.28 albertel 259: my %previous=&Apache::response::check_for_previous($responsestr,
260: $part,$id);
1.22 albertel 261: &Apache::lonxml::debug("Got $right right and $wrong wrong, and $ignored were ignored");
1.75 albertel 262: $Apache::lonhomework::results{"resource.$part.$id.submission"}=
263: $responsestr;
264: $Apache::lonhomework::results{"resource.$part.$id.submissiongrading"}=$gradestr;
1.173 ! raeburn 265: if ($Apache::lonhomework::type eq 'randomizetry') {
! 266: $Apache::lonhomework::results{"resource.$part.$id.foilorder"} = &Apache::lonnet::array2str(@whichopt);
! 267: }
1.163 raeburn 268: if (($Apache::lonhomework::type eq 'survey') ||
269: ($Apache::lonhomework::type eq 'surveycred') ||
270: ($Apache::lonhomework::type eq 'anonsurvey') ||
271: ($Apache::lonhomework::type eq 'anonsurveycred')) {
1.121 albertel 272: if ($ignored == 0) {
1.163 raeburn 273: my $ad;
274: if ($Apache::lonhomework::type eq 'anonsurveycred') {
275: $ad=$Apache::lonhomework::results{"resource.$part.$id.awarddetail"}='ANONYMOUS_CREDIT';
276: } elsif ($Apache::lonhomework::type eq 'anonsurvey') {
277: $ad=$Apache::lonhomework::results{"resource.$part.$id.awarddetail"}='ANONYMOUS';
278: } elsif ($Apache::lonhomework::type eq 'surveycred') {
279: $ad=$Apache::lonhomework::results{"resource.$part.$id.awarddetail"}='SUBMITTED_CREDIT';
280: } else {
281: $ad=$Apache::lonhomework::results{"resource.$part.$id.awarddetail"}='SUBMITTED';
282: }
1.121 albertel 283: &Apache::response::handle_previous(\%previous,$ad);
284: } elsif ($wrong==0 && $right==0) {
285: } else {
286: my $ad=$Apache::lonhomework::results{"resource.$part.$id.awarddetail"}='MISSING_ANSWER';
287: &Apache::response::handle_previous(\%previous,$ad);
288: }
289: } elsif (!$Apache::lonhomework::scantronmode) {
1.75 albertel 290: my $ad;
291: if ($wrong==0 && $ignored==0) {
292: $ad='EXACT_ANS';
293: } elsif ($wrong==0 && $right==0) {
294: #nothing submitted
295: } else {
296: if ($ignored==0) {
297: $ad='INCORRECT';
298: } else {
299: $ad='MISSING_ANSWER';
300: }
301: }
302: $Apache::lonhomework::results{"resource.$part.$id.awarddetail"}=$ad;
303: &Apache::response::handle_previous(\%previous,$ad);
1.22 albertel 304: } else {
1.75 albertel 305: my $ad;
306: if ($wrong==0 && $right==0) {
1.120 albertel 307: #nothing submitted only assign a score if we
308: #need to override a previous grade
309: if (defined($Apache::lonhomework::history{"resource.$part.$id.awarddetail"})) {
310: $ad='ASSIGNED_SCORE';
311: }
1.75 albertel 312: } else {
313: $ad='ASSIGNED_SCORE';
314: }
315: $Apache::lonhomework::results{"resource.$part.$id.awarddetail"}=$ad;
316: $Apache::lonhomework::results{"resource.$part.$id.awarded"}=
317: $right/(scalar(@whichopt));
1.76 albertel 318: $Apache::lonhomework::results{"resource.$part.$id.numfoils"}=
319: scalar(@whichopt);
1.1 albertel 320: }
1.22 albertel 321: }
1.1 albertel 322: }
1.147 foxr 323: my $part_id = $Apache::inputtags::part;
324: my $response_id = $Apache::inputtags::response[-1];
1.146 foxr 325: &Apache::lonxml::increment_counter(&getfoilcounts($max),
1.147 foxr 326: "$part_id.$response_id");
1.146 foxr 327: if ($target eq 'analyze') {
328: &Apache::lonhomework::set_bubble_lines();
329: }
330:
1.25 albertel 331: } elsif ($target eq 'edit') {
1.22 albertel 332: $result.=&Apache::edit::end_table();
1.74 albertel 333: }
334: if ($target eq 'tex' and $Apache::lonhomework::type ne 'exam') {
1.152 onken 335: if($env{'form.pdfFormFields'} ne 'yes') {
1.167 raeburn 336: $result .= '\end{itemize}';
1.152 onken 337: } else {
338: $result .= "\\\\";
339: }
1.74 albertel 340: }
1.110 albertel 341: &Apache::response::poprandomnumber();
1.22 albertel 342: return $result;
1.1 albertel 343: }
344:
345: sub getfoilcounts {
1.48 albertel 346: my ($max)=@_;
1.22 albertel 347: # +1 since instructors will count from 1
348: my $count = $#{ $Apache::response::foilgroup{'names'} }+1;
1.39 albertel 349: if (&Apache::response::showallfoils()) { $max=$count; }
1.48 albertel 350: if ($count>$max) { $count=$max }
351: &Apache::lonxml::debug("Count is $count from $max");
352: return $count;
1.1 albertel 353: }
354:
355: sub whichfoils {
1.77 albertel 356: my ($max,$randomize)=@_;
357: return &Apache::response::whichorder($max,$randomize,
358: &Apache::response::showallfoils(),
359: \%Apache::response::foilgroup);
1.1 albertel 360: }
361:
1.25 albertel 362: sub displayanswers {
1.130 albertel 363: my ($max,$randomize,@opt)=@_;
364: if (!defined(@{ $Apache::response::foilgroup{'names'} })) {return;}
365: my @names = @{ $Apache::response::foilgroup{'names'} };
366: my @whichopt = &whichfoils($max,$randomize);
367: my $result;
368: if ($Apache::lonhomework::type eq 'exam') {
369: my $i = 0;
370: my %opt = map { ($_,$i++) } @opt;
371:
372: $i = 0;
373: my @alphabet = ('A'..'Z');
374: foreach my $name (@whichopt) {
375: $result.=&Apache::response::answer_header('optionresponse',$i++);
376: $result.=&Apache::response::answer_part('optionresponse',
377: $alphabet[$opt{$Apache::response::foilgroup{$name.'.value'}}]);
378: $result.=&Apache::response::answer_part('optionresponse',
379: $Apache::response::foilgroup{$name.'.value'});
380: $result.=&Apache::response::answer_footer('optionresponse');
381: }
382: } else {
383: $result=&Apache::response::answer_header('optionresponse');
384: foreach my $name (@whichopt) {
385: $result.=&Apache::response::answer_part('optionresponse',
386: $Apache::response::foilgroup{$name.'.value'});
387: }
388: $result.=&Apache::response::answer_footer('optionresponse');
389: }
390: return $result;
1.25 albertel 391: }
392:
1.160 www 393: sub check_box_opt {
1.161 www 394: my ($target,$checkboxvalue,@opt)=@_;
395: # Check if we are in checkbox mode: checkboxvalue specified, on web, only two options.
396: # If so, return "checked" value
397: if ($#opt!=1) { return ''; }
398: if ($target ne 'web') { return ''; }
399: return $checkboxvalue;
1.160 www 400: }
401:
1.106 albertel 402: sub check_for_invalid {
403: my ($names,$options) = @_;
404: my %bad_names;
405: foreach my $name (@{ $names }) {
406: my $value=$Apache::response::foilgroup{$name.'.value'};
407: my $found=0;
408: foreach my $option (@{ $options }) {
409: if ($value eq $option) { $found=1; }
410: }
411: if (!$found) { $bad_names{$name}=$value; }
412: }
413: if (%bad_names) {
414: my $error=&mt('The question can not be gotten correct, '.
415: 'the following foils in the <optionresponse> '.
416: 'have invalid correct options').' <br /><tt>'.
417: join('<br />',(map { $_=&mt("[_1] with value [_2]",$_,$bad_names{$_}) } (keys(%bad_names)))).
418: "</tt>";
419: &Apache::lonxml::error($error);
420: }
421: }
422:
1.1 albertel 423: sub displayfoils {
1.172 www 424: my ($target,$max,$randomize,$TeXlayout,$checkboxvalue,$checkboxchoices,@opt)=@_;
1.67 albertel 425: if (!defined(@{ $Apache::response::foilgroup{'names'} })) {return;}
1.22 albertel 426: my @names = @{ $Apache::response::foilgroup{'names'} };
427: my @truelist;
428: my @falselist;
1.79 sakharuk 429: my $result;
1.22 albertel 430: my $name;
1.101 albertel 431: my $displayoptionintex=1;
1.72 sakharuk 432: my @alphabet = ('A'..'Z');
1.48 albertel 433: my @whichopt = &whichfoils($max,$randomize);
1.106 albertel 434: &check_for_invalid(\@whichopt,\@opt);
1.28 albertel 435: my $part=$Apache::inputtags::part;
436: my $id=$Apache::inputtags::response[-1];
1.62 albertel 437: my $break;
1.65 albertel 438: my $solved=$Apache::lonhomework::history{"resource.$part.solved"};
1.86 albertel 439: if ( ($target ne 'tex') &&
440: &Apache::response::show_answer() ) {
1.90 albertel 441: my $temp=1;
1.22 albertel 442: foreach $name (@whichopt) {
1.62 albertel 443: my $text=$Apache::response::foilgroup{$name.'.text'};
1.163 raeburn 444: my $lastresp;
445: unless ((($Apache::lonhomework::history{"resource.$part.type"} eq 'anonsurvey') || ($Apache::lonhomework::history{"resource.$part.type"} eq 'anonsurveycred')) && (defined($env{'form.grade_symb'}))) {
446: $lastresp = $Apache::lonhomework::history{"resource.$part.$id.submission"};
447: }
448: my %lastresponse=&Apache::lonnet::str2hash($lastresp);
1.90 albertel 449: my $lastopt=$lastresponse{$name};
1.101 albertel 450: if ($text!~/^\s*$/) { $break='<br />'; }
1.62 albertel 451: $result.=$break;
1.113 sakharuk 452: if ($target eq 'web') {
1.62 albertel 453: my $value=$Apache::response::foilgroup{$name.'.value'};
454: if (!($text=~s|<drawoptionlist\s*/>|$value|)) {
455: if ($text=~/^\s*$/) {
456: $text=$value.$text;
457: } else {
1.127 albertel 458: $text='<b>'.$value.':</b> '.$text;
1.62 albertel 459: }
1.95 albertel 460: } else {
1.170 raeburn 461: if (@whichopt > 1) {
462: $text='•'.$text;
463: }
1.62 albertel 464: }
465: $result.=$text."\n";
1.112 sakharuk 466: }
1.58 sakharuk 467: if ($Apache::lonhomework::type eq 'exam') {
1.90 albertel 468: $result.=&webbubbles(\@opt,\@alphabet,$temp,$lastopt);
1.58 sakharuk 469: }
1.90 albertel 470: $temp++;
1.22 albertel 471: }
472: } else {
473: my $temp=1;
1.173 ! raeburn 474: my %lastresponse;
! 475: my $newvariation;
! 476: if ((($Apache::lonhomework::history{"resource.$part.type"} eq 'randomizetry') ||
! 477: ($Apache::lonhomework::type eq 'randomizetry')) &&
! 478: ($Apache::inputtags::status[-1] eq 'CAN_ANSWER')) {
! 479: if ($env{'form.'.$part.'.rndseed'} ne
! 480: $Apache::lonhomework::history{"resource.$part.rndseed"}) {
! 481: $newvariation = 1;
! 482: }
! 483: }
! 484: unless ($newvariation) {
! 485: %lastresponse=&Apache::lonnet::str2hash($Apache::lonhomework::history{"resource.$part.$id.submission"});
! 486: }
1.79 sakharuk 487: my $internal_counter=$Apache::lonxml::counter;
1.161 www 488: my $checkboxopt=&check_box_opt($target,$checkboxvalue,@opt);
1.160 www 489: if ($checkboxopt) {
1.172 www 490: $result.='<br />'.
491: ($checkboxchoices?&mt('Choices: ').'<b>'.$opt[0].','.$opt[1].'</b>. ':'').
1.168 www 492: &mt('Select all that are <b>[_1]</b>.',$checkboxopt);
1.160 www 493: }
1.22 albertel 494: foreach $name (@whichopt) {
1.62 albertel 495: my $text=$Apache::response::foilgroup{$name.'.text'};
496: if ($text!~/^\s*$/) {
497: if ($target eq 'tex') {
498: $break='\vskip 0 mm ';
499: } elsif ($target eq 'web') {
500: $break='<br />';
501: }
502: }
1.28 albertel 503: my $lastopt=$lastresponse{$name};
504: my $optionlist="<option></option>\n";
1.152 onken 505:
1.158 onken 506: if($target eq 'tex' and $env{'form.pdfFormFields'} eq 'yes'
507: && $Apache::inputtags::status[-1] eq 'CAN_ANSWER') {
1.152 onken 508: my $fieldname = $env{'request.symb'}.'&part_'.$Apache::inputtags::part.'&optionresponse'.'&HWVAL_'.$Apache::inputtags::response['-1'].':'.$temp;
509: $optionlist = &Apache::lonxml::print_pdf_start_combobox($fieldname);
510: }
511:
1.126 albertel 512: foreach my $option (@opt) {
513: my $escopt=&HTML::Entities::encode($option,'\'"&<>');
1.152 onken 514: if ($option eq $lastopt) {
1.158 onken 515: if ($target eq 'tex' && $env{'form.pdfFormFields'} eq 'yes'
1.164 onken 516: && $Apache::inputtags::status[-1] eq 'CAN_ANSWER'
517: && $Apache::lonhomework::type ne 'exam') {
1.152 onken 518: $optionlist .= &Apache::lonxml::print_pdf_add_combobox_option($option);
519: } else {
520: $optionlist.="<option value='".$escopt."' selected=\"selected\">$option</option>\n";
521: }
522: } else {
1.158 onken 523: if ($target eq 'tex' && $env{'form.pdfFormFields'} eq 'yes'
1.164 onken 524: && $Apache::inputtags::status[-1] eq 'CAN_ANSWER'
525: && $Apache::lonhomework::type ne 'exam') {
1.152 onken 526: $optionlist .= &Apache::lonxml::print_pdf_add_combobox_option($option);
527: } else {
528: $optionlist.="<option value='".$escopt."'>$option</option>\n";
529: }
530: }
1.28 albertel 531: }
1.32 sakharuk 532: if ($target ne 'tex') {
1.72 sakharuk 533: if ($Apache::lonhomework::type ne 'exam') {
1.159 www 534: # we are on the web, this is not an exam, and the problem can be answered
535: if ($checkboxopt) {
536: # generate checkboxes
537: my $fieldname=$Apache::inputtags::response['-1'].':'.$temp;
538: my $altopt=$opt[0];
539: if ($opt[0] eq $checkboxopt) {
540: $altopt=$opt[1];
541: }
542: my $defopt=$lastopt;
543: unless ($defopt) { $defopt=$altopt; }
544: my $escdefopt=&HTML::Entities::encode($defopt,'\'"&<>');
545: my $esccheckboxopt=&HTML::Entities::encode($checkboxopt,'\'"&<>');
546: my $escaltopt=&HTML::Entities::encode($altopt,'\'"&<>');
547: # checkboxopt is how the box is labelled
548: # altopt is the alternative option
549: # lastopt is what the user submitted before
550: # defopt is what the field is going to start out with: either previous choice or altopt
551: # fieldname is this input field's name after HWVAL_
552: $optionlist='<input type="hidden" name="HWVAL_'.$fieldname.'" value="'.$escdefopt.'" />'.
1.160 www 553: '<input type="checkbox" name="HWCHK_'.$fieldname.'" onclick="javascript:if (this.form.elements[\'HWCHK_'.
554: $fieldname.'\'].checked) { this.form.elements[\'HWVAL_'.$fieldname.'\'].value=\''.$esccheckboxopt.'\'; } else { this.form.elements[\'HWVAL_'.$fieldname.'\'].value=\''.$escaltopt.'\'; };setSubmittedPart(\''.$part.'\');"'.($defopt eq $checkboxopt?' checked="checked"':'')." />\n";
1.159 www 555: } else {
556: # classic selection list
557: $optionlist='<select onchange="javascript:setSubmittedPart(\''.
1.139 albertel 558: $part.'\');" name="HWVAL_'.
1.101 albertel 559: $Apache::inputtags::response['-1'].':'.$temp.'">'.
1.59 albertel 560: $optionlist."</select>\n";
1.159 www 561: }
1.101 albertel 562: } else {
563: $optionlist='<u>'.(' 'x10).'</u>';
1.72 sakharuk 564: }
1.101 albertel 565: if ($text=~s|<drawoptionlist\s*/>|$optionlist|) {
566: if ($Apache::lonhomework::type ne 'exam') {
1.170 raeburn 567: if (@whichopt > 1) {
568: $text='•'.$text;
569: }
1.101 albertel 570: }
1.95 albertel 571: } else {
1.101 albertel 572: if ($Apache::lonhomework::type ne 'exam') {
573: $text=$optionlist.$text;
574: }
1.59 albertel 575: }
1.62 albertel 576: $result.=$break.$text."\n";
1.49 sakharuk 577: if ($Apache::lonhomework::type eq 'exam') {
1.101 albertel 578: $result.=&webbubbles(\@opt,\@alphabet,$temp,$lastopt);
1.49 sakharuk 579: }
1.32 sakharuk 580: $temp++;
581: } else {
1.101 albertel 582: my $texoptionlist='';
583: if ($displayoptionintex &&
584: $Apache::lonhomework::type ne 'exam') {
1.107 sakharuk 585: $texoptionlist = &optionlist_correction($TeXlayout,@opt);
1.101 albertel 586: }
587: if ($text=~/<drawoptionlist\s*\/>/) {
1.136 foxr 588: $text=~s|<drawoptionlist\s*\/>| \\makebox\[0\.3in\]\[b\]\{\\hrulefill\} |g;
1.101 albertel 589: }
590:
591: if ($text=~m/\\item /) {
1.50 sakharuk 592: if ($Apache::lonhomework::type eq 'exam') {
1.101 albertel 593: $text=~s/\\item/\\vskip 2 mm/;
1.152 onken 594: } elsif ($env{'form.pdfFormFields'} ne 'yes') {
595: $result.= $texoptionlist.$text;
596: }
597: } else {
1.101 albertel 598: if ($Apache::lonhomework::type eq 'exam') {
599: $result.= $texoptionlist.' '.$text;
1.152 onken 600: } elsif ($env{'form.pdfFormFields'} ne 'yes') {
601: if ($text=~/\S/) {
602: $result.= $texoptionlist.'\vspace*{-2 mm}\item '.$text;
603: } else {
604: $result.= $texoptionlist;
605: }
1.50 sakharuk 606: }
1.32 sakharuk 607: }
1.101 albertel 608: if ($Apache::lonhomework::type eq 'exam') {
1.165 foxr 609: $result.='\vskip -1 mm\noindent';
610: $result.= '\textbf{'. $internal_counter.'}. \vskip -3mm'.&bubbles(\@alphabet,\@opt).
611: ' \strut ';
1.101 albertel 612: $internal_counter++;
613: }
1.158 onken 614: if ($target eq 'tex' && $env{'form.pdfFormFields'} eq 'yes'
1.164 onken 615: && $Apache::inputtags::status[-1] eq 'CAN_ANSWER'
616: && $Apache::lonhomework::type ne 'exam') {
1.158 onken 617: $text =~ s/\\item//m;
1.152 onken 618: $result .= " $optionlist ". &Apache::lonxml::print_pdf_end_combobox($text).'\strut \\\\';
619: $temp++;
620: }
1.101 albertel 621: $displayoptionintex=0;
1.62 albertel 622: }
1.1 albertel 623: }
1.62 albertel 624: }
1.138 albertel 625:
626: if ($target eq 'web') {
1.173 ! raeburn 627: my $data = [\@whichopt,'submissiongrading'];
! 628: my $questiontype;
! 629: if ($Apache::lonhomework::type eq 'randomizetry') {
! 630: $questiontype = $Apache::lonhomework::type,
! 631: }
! 632: &Apache::response::setup_prior_tries_hash(\&Apache::rankresponse::format_prior_answer,$data,$questiontype);
1.138 albertel 633: }
634:
1.32 sakharuk 635: if ($target ne 'tex') {
1.62 albertel 636: return $result.$break;
637: } else {
1.32 sakharuk 638: return $result;
1.22 albertel 639: }
1.50 sakharuk 640: }
641:
642:
643: sub optionlist_correction {
1.107 sakharuk 644: my ($TeXlayout,@options) = @_;
1.150 bisitz 645: my $texoptionlist='\\item [] '.&mt('Choices:').' ';
1.107 sakharuk 646: if ($TeXlayout eq 'vertical') {$texoptionlist='\\item []';}
1.101 albertel 647: if (scalar(@options) > 0) {
648: foreach my $option (@options) {
649: $texoptionlist.='{\bf '.
1.135 albertel 650: &Apache::lonxml::latex_special_symbols($option).
1.107 sakharuk 651: '}';
652: if ($TeXlayout eq 'vertical') {
653: $texoptionlist.=' \vskip 0 mm ',
654: } else {
1.115 sakharuk 655: $texoptionlist.=', ';
1.107 sakharuk 656: }
1.101 albertel 657: }
1.116 albertel 658: $texoptionlist=~s/, $//;
1.107 sakharuk 659: if ($TeXlayout ne 'vertical') {$texoptionlist.='.';}
1.80 sakharuk 660: } else {
1.107 sakharuk 661: if ($TeXlayout ne 'vertical') {$texoptionlist='\\item [] \\vskip -5 mm';}
1.80 sakharuk 662: }
1.50 sakharuk 663: return $texoptionlist;
1.58 sakharuk 664: }
665:
666:
667: sub webbubbles {
1.90 albertel 668: my ($ropt,$ralphabet,$temp,$lastopt)=@_;
1.58 sakharuk 669: my @opt=@$ropt;
670: my @alphabet=@$ralphabet;
671: my $result='';
1.90 albertel 672: my $number_of_bubbles = $#opt + 1;
673: $result.= '<table border="1"><tr>';
674: for (my $ind=0;$ind<$number_of_bubbles;$ind++) {
675: my $checked='';
676: if ($lastopt eq $opt[$ind]) {
677: $checked=' checked="on" ';
1.58 sakharuk 678: }
1.90 albertel 679: $result.='<td><input type="radio" name="HWVAL_'.
680: $Apache::inputtags::response['-1'].':'.$temp.
1.111 albertel 681: '" value="'.$opt[$ind].'" '.$checked.' />';
682: if ($alphabet[$ind]) {
683: $result.=$alphabet[$ind].': ';
684: }
685: $result.=$opt[$ind].'</td>';
1.90 albertel 686: }
687: $result.='</tr></table>';
688: return $result;
1.50 sakharuk 689: }
690:
691:
692: sub bubbles {
1.140 foxr 693: my ($ralphabet,$ropt,$response, $max_width) = @_;
1.119 albertel 694: my @alphabet = @$ralphabet;
1.50 sakharuk 695: my @opt = @$ropt;
1.51 sakharuk 696: my ($result,$head,$line) =('','','');
1.50 sakharuk 697: my $number_of_bubbles = $#opt + 1;
1.51 sakharuk 698: my $current_length = 0;
1.100 sakharuk 699: my $textwidth;
1.141 albertel 700: if (defined($max_width)) {
1.140 foxr 701: $textwidth=$max_width;
1.141 albertel 702: &Apache::lonxml::debug("Max width passed in: $max_width");
703: } elsif ($env{'form.textwidth'} ne '') {
1.125 albertel 704: $env{'form.textwidth'}=~/(\d+)/;
1.100 sakharuk 705: $textwidth=$1;
1.141 albertel 706: &Apache::lonxml::debug("Max width from form: $textwidth");
1.100 sakharuk 707: } else {
1.125 albertel 708: $env{'form.textwidth'}=~/(\d*)\.?(\d*)/;
1.102 sakharuk 709: $textwidth=$1.'.'.$2;
1.141 albertel 710: &Apache::lonxml::debug("Max width defaults? $textwidth");
1.100 sakharuk 711: }
1.141 albertel 712: &Apache::lonxml::debug("Final maxwidth: $textwidth");
1.51 sakharuk 713: for (my $ind=0;$ind<=$number_of_bubbles;$ind++) {
1.99 sakharuk 714: my $leftmargin;
1.101 albertel 715: $opt[$ind]=&Apache::lonxml::latex_special_symbols($opt[$ind]);
1.119 albertel 716: if ($response eq 'rankresponse') {$opt[$ind]='Rank '.$opt[$ind];}
1.99 sakharuk 717: if ($ind==0) {$leftmargin=6;} else {$leftmargin=10;}
1.140 foxr 718:
1.102 sakharuk 719: $current_length += (length($opt[$ind])+length($alphabet[$ind])+4)*2;
1.99 sakharuk 720: if ($current_length<($textwidth-$leftmargin) and $ind!=$number_of_bubbles) {
1.171 raeburn 721: $line.='\hskip 4 mm {\small \textbf{'.$alphabet[$ind].'}}$\bigcirc$\hskip -1 mm & \hskip -3 mm {\small '.$opt[$ind].'} & ';
1.51 sakharuk 722: $head.='lr';
723: } else {
724: $line=~s/\&\s*$//;
1.171 raeburn 725: $result.='\vskip -1 mm\noindent\setlength{\tabcolsep}{2 mm}\renewcommand{\arraystretch}{1.25}\begin{tabular}{'.$head.'}'.$line.'\\\\\end{tabular}\vskip 0 mm';
726: $line = '\hskip 4 mm {\small \textbf{'.$alphabet[$ind].'}}$\bigcirc$\hskip -1 mm & \hskip -3 mm {\small '.$opt[$ind].'} & ';;
1.51 sakharuk 727: $head ='lr';
728: $current_length = (length($opt[$ind])+length($alphabet[$ind]))*2;
729: }
730:
1.50 sakharuk 731: }
732: return $result;
1.1 albertel 733: }
734:
1.22 albertel 735:
1.2 albertel 736: sub start_conceptgroup {
1.22 albertel 737: my ($target,$token,$tagstack,$parstack,$parser,$safeeval,$style)=@_;
738: $Apache::optionresponse::conceptgroup=1;
1.44 albertel 739: %Apache::response::conceptgroup=();
1.22 albertel 740: my $result;
741: if ($target eq 'edit') {
742: $result.=&Apache::edit::tag_start($target,$token,"Concept Grouped Foils");
1.30 matthew 743: $result.=&Apache::edit::text_arg('Concept:','concept',$token,'50').
744: &Apache::edit::end_row().&Apache::edit::start_spanning_row();
1.22 albertel 745: }
746: if ($target eq 'modified') {
747: my $constructtag=&Apache::edit::get_new_args($token,$parstack,$safeeval,'concept');
748: if ($constructtag) { $result = &Apache::edit::rebuild_tag($token); }
749: }
750: return $result;
1.2 albertel 751: }
752:
753: sub end_conceptgroup {
1.22 albertel 754: my ($target,$token,$tagstack,$parstack,$parser,$safeeval,$style)=@_;
755: $Apache::optionresponse::conceptgroup=0;
756: my $result='';
1.93 albertel 757: if ($target eq 'web' || $target eq 'grade' || $target eq 'answer' ||
758: $target eq 'tex' || $target eq 'analyze') {
1.22 albertel 759: #if not there aren't any foils to display and thus no question
1.93 albertel 760: &Apache::response::pick_foil_for_concept($target,
761: ['value','text','location'],
762: \%Apache::hint::option,
763: $parstack,$safeeval);
1.34 albertel 764: } elsif ($target eq 'edit') {
1.22 albertel 765: $result=&Apache::edit::end_table();
766: }
767: return $result;
1.2 albertel 768: }
769:
1.16 albertel 770: sub insert_conceptgroup {
1.22 albertel 771: my $result="\n\t\t<conceptgroup concept=\"\">".&insert_foil()."\n\t\t</conceptgroup>\n";
772: return $result;
1.16 albertel 773: }
774:
1.1 albertel 775: sub start_foil {
1.22 albertel 776: my ($target,$token,$tagstack,$parstack,$parser,$safeeval,$style)=@_;
777: my $result='';
1.34 albertel 778: if ($target eq 'web' || $target eq 'tex' || $target eq 'analyze' ) {
1.105 albertel 779: &Apache::lonxml::startredirection;
780: if ($target eq 'analyze') {
781: &Apache::response::check_if_computed($token,$parstack,$safeeval,'value');
782: }
1.25 albertel 783: } elsif ($target eq 'edit') {
1.22 albertel 784: $result=&Apache::edit::tag_start($target,$token,"Foil");
785: my $level='-2';
786: if ($$tagstack['-2'] eq 'conceptgroup') { $level = '-3'; }
787: my @opt;
788: eval '@opt ='.&Apache::lonxml::get_param('options',$parstack,$safeeval,$level);
789: $result.=&Apache::edit::text_arg('Name:','name',$token);
1.48 albertel 790: $result.= &Apache::edit::select_or_text_arg('Correct Option:','value',
791: ['unused',(@opt)],$token,'15');
792: my $randomize=&Apache::lonxml::get_param('randomize',$parstack,
793: $safeeval,'-3');
794: if ($randomize ne 'no') {
795: $result.=&Apache::edit::select_arg('Location:','location',
796: ['random','top','bottom'],$token);
797: }
1.30 matthew 798: $result .=&Apache::edit::end_row().&Apache::edit::start_spanning_row();
1.25 albertel 799: } elsif ($target eq 'modified') {
1.48 albertel 800: my $constructtag=&Apache::edit::get_new_args($token,$parstack,$safeeval,
801: 'value','name','location');
1.22 albertel 802: if ($constructtag) { $result = &Apache::edit::rebuild_tag($token); }
1.32 sakharuk 803: }
1.22 albertel 804: return $result;
1.1 albertel 805: }
806:
807: sub end_foil {
1.22 albertel 808: my ($target,$token,$tagstack,$parstack,$parser,$safeeval,$style)=@_;
809: my $text ='';
810: my $result = '';
1.88 albertel 811: if ($target eq 'web' || $target eq 'tex' || $target eq 'analyze') {
1.48 albertel 812: $text=&Apache::lonxml::endredirection;
1.114 sakharuk 813: if ($target eq 'tex') {$text=~s/\\strut\s*\\\\\s*\\strut/\\vskip 0 mm/;}
1.107 sakharuk 814: if (($target eq 'tex') and ($Apache::lonhomework::type ne 'exam') and ($text=~/\S/)) {$text = '\vspace*{-2 mm}\item '.$text;}
1.32 sakharuk 815: }
816: if ($target eq 'web' || $target eq 'grade' || $target eq 'answer'
1.34 albertel 817: || $target eq 'tex' || $target eq 'analyze') {
1.22 albertel 818: my $value = &Apache::lonxml::get_param('value',$parstack,$safeeval);
1.122 albertel 819: if ($target eq 'tex' && $Apache::lonhomework::type eq 'exam') {
820: $text='\vskip 5mm $\triangleright$ '.$text;
821: }
1.22 albertel 822: if ($value ne 'unused') {
823: my $name = &Apache::lonxml::get_param('name',$parstack,$safeeval);
824: &Apache::lonxml::debug("Got a name of :$name:");
1.129 albertel 825: if ($name eq "") {
1.151 bisitz 826: &Apache::lonxml::warning(&mt('Foils without names exist. This can cause problems to malfunction.'));
1.123 albertel 827: $name=$Apache::lonxml::curdepth;
828: }
1.22 albertel 829: &Apache::lonxml::debug("Using a name of :$name:");
1.103 albertel 830: if (defined($Apache::response::foilnames{$name})) {
1.151 bisitz 831: &Apache::lonxml::error(&mt("Foil name [_1] appears more than once. Foil names need to be unique.",'<b><tt>'.$name.'</tt></b>'));
1.103 albertel 832: }
1.104 albertel 833: $Apache::response::foilnames{$name}++;
1.103 albertel 834: my $location =&Apache::lonxml::get_param('location',$parstack,$safeeval);
1.39 albertel 835: if ( $Apache::optionresponse::conceptgroup
836: && !&Apache::response::showallfoils() ) {
1.22 albertel 837: push @{ $Apache::response::conceptgroup{'names'} }, $name;
838: $Apache::response::conceptgroup{"$name.value"} = $value;
1.122 albertel 839: $Apache::response::conceptgroup{"$name.text"} = $text;
1.48 albertel 840: $Apache::response::conceptgroup{"$name.location"} = $location;
1.22 albertel 841: } else {
842: push @{ $Apache::response::foilgroup{'names'} }, $name;
1.48 albertel 843: $Apache::response::foilgroup{"$name.value"} = $value;
1.122 albertel 844: $Apache::response::foilgroup{"$name.text"} = $text;
1.48 albertel 845: $Apache::response::foilgroup{"$name.location"} = $location;
1.22 albertel 846: }
847: }
848: }
849: if ($target eq 'edit') {
850: $result.= &Apache::edit::tag_end($target,$token,'');
851: }
852: return $result;
1.1 albertel 853: }
854:
1.112 sakharuk 855: sub start_drawoptionlist {
856: my ($target,$token,$tagstack,$parstack,$parser,$safeeval,$style)=@_;
1.144 albertel 857: if ($target !~ /^(?:meta|answer|modified|edit)$/) {
1.117 albertel 858: return $token->[4];
859: }
1.112 sakharuk 860: }
861:
862: sub end_drawoptionlist {
863: my ($target,$token,$tagstack,$parstack,$parser,$safeeval,$style)=@_;
1.144 albertel 864: if ($target !~ /^(?:meta|answer|modified|edit)$/) {
1.117 albertel 865: return $token->[2];
866: }
1.112 sakharuk 867: }
868:
1.7 albertel 869: sub insert_foil {
1.144 albertel 870: return '
1.15 albertel 871: <foil name="" value="unused">
1.14 albertel 872: <startouttext />
873: <endouttext />
1.7 albertel 874: </foil>';
875: }
1.144 albertel 876:
877: sub insert_drawoptionlist {
878: return '<drawoptionlist />';
879: }
1.1 albertel 880: 1;
881: __END__
882:
1.156 jms 883: =head1 NAME
884:
885: Apache::optionresponse.pm;
886:
887: =head1 SYNOPSIS
888:
889: Handles tags associated with showing a list of
890: options.
891:
892: This is part of the LearningOnline Network with CAPA project
893: described at http://www.lon-capa.org.
894:
895: =head1 HANDLER SUBROUTINE
896:
897: start_optionresponse()
898:
899: =head1 OTHER SUBROUTINES
900:
901: =over
902:
903: =item end_optionresponse()
904:
905: =item start_foilgroup()
906:
907: =item end_foilgroup()
908:
909: =item getfoilcounts()
910:
911: =item displayanswers()
912:
913: =item check_for_invalid()
914:
915: =item displayfoils()
916:
917: =item optionlist_correction()
918:
919: =item webbubbles()
920:
921: =item bubbles()
922:
923: =item start_conceptgroup()
924:
925: =item end_conceptgroup()
926:
927: =item insert_conceptgroup()
928:
929: =item start_foil()
930:
931: =item end_foil()
932:
933: =item start_drawoptionlist()
934:
935: =item end_drawoptionlist()
936:
937: =item insert_foil()
938:
939: =item insert_drawoptionlist()
940:
941: =back
942:
1.157 raeburn 943: =cut
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