1: # The LearningOnline Network with CAPA
2: # definition of tags that give a structure to a document
3: #
4: # $Id: structuretags.pm,v 1.104 2002/08/20 14:42:22 sakharuk Exp $
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: #
28: # 2/19 Guy
29: # 6/26/2001 fixed extra web display at end of <web></web> tags
30: # 8/17,8/18,8/20 Gerd Kortemeyer
31:
32: package Apache::structuretags;
33:
34: use strict;
35: use Apache::lonnet;
36: use Apache::File();
37:
38: BEGIN {
39: &Apache::lonxml::register('Apache::structuretags',('block','while','randomlist','problem','library','web','tex','part','preduedate','postanswerdate','solved','notsolved','startouttext','endouttext'));
40: # &Apache::lonxml::register_insert('problem','',('part','postanswerdate','preduedate'))
41: }
42:
43: sub start_web {
44: my ($target,$token,$tagstack,$parstack,$parser,$safeeval)=@_;
45: my $bodytext=&Apache::lonxml::get_all_text("/web",$$parser[$#$parser]);
46: if ($target eq 'web') {
47: return $bodytext;
48: }
49: return '';
50: }
51:
52: sub end_web {
53: return '';
54: }
55:
56: sub start_tex {
57: my ($target,$token,$tagstack,$parstack,$parser,$safeeval)=@_;
58: my $bodytext=&Apache::lonxml::get_all_text("/tex",$$parser[$#$parser]);
59: if ($target eq 'tex') {
60: return $bodytext.' ';
61: }
62: return '';
63: }
64:
65: sub end_tex {
66: return '';
67: }
68:
69: sub page_start {
70: my ($target,$token,$tagstack,$parstack,$parser,$safeeval)=@_;
71: my %found;
72: foreach my $taginside ($tagstack) {
73: foreach my $taglookedfor ('html','body','form') {
74: if ($taginside =~ /^$taglookedfor$/i) { $found{$taglookedfor} = 1; }
75: }
76: }
77:
78: my $result;
79: my $head_tag_start;
80: if (!defined($found{'html'})) {
81: $result=&Apache::londefdef::start_html($target,$token,$tagstack,$parstack,
82: $parser,$safeeval);
83: $head_tag_start='<head>'.&Apache::lonxml::registerurl(undef,$target);
84: }
85: my $body_tag_start;
86: if (!defined($found{'body'})) {
87: $body_tag_start='<body onLoad="'.&Apache::lonxml::loadevents().'" '.
88: 'onUnload="'.&Apache::lonxml::unloadevents().'" ';
89: my $background=&Apache::lonxml::get_param('background',$parstack,$safeeval);
90: if ($background) {
91: $Apache::lonxml::extlinks[$#Apache::lonxml::extlinks+1]=
92: $background;
93: $body_tag_start.='background="'.$background.'" ';
94: } else {
95: my $bgcolor=&Apache::lonxml::get_param('bgcolor',$parstack,$safeeval);
96: if ($bgcolor) {
97: $body_tag_start.='bgcolor="'.$bgcolor.'" ';
98: } else {
99: $body_tag_start.='bgcolor="#ffffff"';
100: }
101: }
102: $body_tag_start.='>';
103: }
104: return ($result,$head_tag_start,$body_tag_start);
105: }
106:
107: sub initialize_storage {
108: %Apache::lonhomework::results=();
109: my ($symb,$courseid,$domain,$name) = &Apache::lonxml::whichuser();
110: if ($ENV{'request.state'} eq 'construct') {
111: %Apache::lonhomework::history=
112: &Apache::lonnet::tmprestore($ENV{'request.uri'},'',$domain,$name);
113: my ($temp)=keys %Apache::lonhomework::history ;
114: &Apache::lonxml::debug("Return message of $temp");
115: } else {
116: %Apache::lonhomework::history=
117: &Apache::lonnet::restore($symb,$courseid,$domain,$name);
118: }
119: #ignore error conditions
120: my ($temp)=keys %Apache::lonhomework::history ;
121: if ($temp =~ m/^error:.*/) { %Apache::lonhomework::history=(); }
122: }
123:
124: # -------------------------------------------------------------finalize_storage
125: # Stores away the result has to a student's environment
126: # checks form.grade_ for specific values, other wises stores
127: # to the running users environment
128: sub finalize_storage {
129: my $result;
130: my ($temp) = keys %Apache::lonhomework::results;
131: if ( $temp ne '' ) {
132: my ($symb,$courseid,$domain,$name) = &Apache::lonxml::whichuser();
133: if ($ENV{'request.state'} eq 'construct') {
134: $result=&Apache::lonnet::tmpstore(\%Apache::lonhomework::results,
135: $ENV{'request.uri'},'',$domain,$name);
136: &Apache::lonxml::debug('Construct Store return message:'.$result);
137: } else {
138: $result=&Apache::lonnet::cstore(\%Apache::lonhomework::results,
139: $symb,$courseid,$domain,$name);
140: &Apache::lonxml::debug('Store return message:'.$result);
141: }
142: }
143: return $result;
144: }
145:
146: sub checkout_msg {
147: return (<<ENDCHECKOUT);
148: <h2>The resource needs to be checked out</h2>
149: As a resource gets checked out, a unique timestamped ID is given to it, and a
150: permanent record is left in the system.<p />
151: <font color=red>
152: Checking out resources is subject to course policies, and may exclude future
153: credit even if done erroneously.<p />
154: </font>
155: <form name="checkout" method="POST" action="$ENV{'request.uri'}">
156: <input type="hidden" name="doescheckout" value="yes" />
157: <input type="button" name="checkoutbutton" value="Check out Exam for Viewing" onClick="javascript:if (confirm('Check out Exam?')) { document.checkout.submit(); }" />
158: </form>
159: ENDCHECKOUT
160: }
161:
162: sub start_problem {
163: my ($target,$token,$tagstack,$parstack,$parser,$safeeval)=@_;
164:
165: # meta is called from lonpublisher, which doesn't uses the normal
166: # lonhomework method of parsing the file which means that inputtags
167: # won't get reset
168: if ( $Apache::inputtags::part ne '' && $target != 'meta' ) {
169: &Apache::lonxml::error('Only one problem allowed in a .problem file');
170: my $bodytext=&Apache::lonxml::get_all_text("/problem",$$parser[-1]);
171: return '';
172: }
173: #intialize globals
174: $Apache::inputtags::part='0';
175: @Apache::inputtags::responselist = ();
176: @Apache::inputtags::previous=();
177: if ($target ne 'analyze') {
178: &initialize_storage();
179: if ($target eq 'web') {
180: &Apache::lonhomework::showhash(%Apache::lonhomework::history);
181: }
182: $Apache::lonhomework::type=&Apache::lonnet::EXT('resource.0.type');
183: &Apache::lonxml::debug("Found this to be of type :$Apache::lonhomework::type:");
184: }
185: if ($Apache::lonhomework::type eq '') {
186: my $uri=$ENV{'request.uri'};
187: if ($uri=~/\.(\w+)$/) {
188: $Apache::lonhomework::type=$1;
189: &Apache::lonxml::debug("Using type of $1");
190: } else {
191: $Apache::lonhomework::type='problem';
192: &Apache::lonxml::debug("Using default type, problem, :$uri:");
193: }
194: }
195:
196: #added vars to the scripting enviroment
197: my $expression='$external::part='.$Apache::inputtags::part.';';
198: &Apache::run::run($expression,$safeeval);
199: my $status;
200: my $accessmsg;
201:
202: #should get back a <html> or the neccesary stuff to start XML/MathML
203: my ($result,$head_tag_start,$body_tag_start)=
204: &page_start($target,$token,$tagstack,$parstack,$parser,$safeeval);
205: if ($target eq 'tex' and $ENV{'request.symb'} =~ m/\.page_/) { $result = '';}
206:
207: if ($target eq 'web' || $target eq 'grade' || $target eq 'answer' || $target eq 'tex') {
208: #handle exam checkout
209: if ($Apache::lonhomework::type eq 'exam') {
210: my $token=$Apache::lonhomework::history{"resource.0.outtoken"};
211: if (($ENV{'form.doescheckout'}) && (!$token)) {
212: $token=&Apache::lonxml::maketoken();
213: $Apache::lonhomework::history{"resource.0.outtoken"}=$token;
214: }
215: $body_tag_start.=&Apache::lonxml::printtokenheader($target,$token);
216: }
217:
218: #handle rand seed in construction space
219: my $rndseed;
220: if ($ENV{'request.state'} eq "construct") {
221: $rndseed=$ENV{'form.rndseed'};
222: if (!$rndseed) {
223: $rndseed=time;
224: $ENV{'form.rndseed'}=$rndseed;
225: }
226: &Apache::run::run('$external::randomseed='.$rndseed.';',$safeeval);
227: }
228: ($status,$accessmsg) = &Apache::lonhomework::check_access('0');
229: push (@Apache::inputtags::status,$status);
230: my $expression='$external::datestatus="'.$status.'";';
231: $expression.='$external::gradestatus="'.$Apache::lonhomework::history{"resource.0.solved"}.'";';
232: &Apache::run::run($expression,$safeeval);
233: if (( $status eq 'CLOSED' ) ||
234: ( $status eq 'UNCHECKEDOUT') ||
235: ( $status eq 'BANNED')) {
236: my $bodytext=&Apache::lonxml::get_all_text("/problem",$$parser[$#$parser]);
237: if ( $target eq "web" ) {
238: $result.= $head_tag_start.'</head>';
239: my $msg=$body_tag_start.
240: '<h1>Not open to be viewed</h1>';
241: if ($status eq 'CLOSED') {
242: $msg.='The problem '.$accessmsg;
243: } elsif ($status eq 'UNCHECKEDOUT') {
244: $msg.=&checkout_msg;
245: }
246: $result.=$msg.'<br />';
247: }
248: } elsif ($target eq 'web') {
249: my $name= &Apache::lonxml::get_param('name',$parstack,$safeeval);
250: if ($name eq '') {
251: $name=&Apache::lonnet::EXT('resource.title');
252: if ($name eq 'con_lost') { $name = ''; }
253: }
254: $Apache::lonhomework::name=$name;
255: if ($status eq 'CAN_ANSWER') {
256: # create a page header and exit
257: $result.="$head_tag_start<title>$name</title></head>\n
258: $body_tag_start\n
259: <form name=\"lonhomework\" method=\"POST\" action=\"".$ENV{'request.uri'}."\">".
260: '<input type="hidden" name="submitted" value="yes" />';
261: if ($ENV{'request.state'} eq "construct") {
262: $result.=
263: '<input type="hidden" name="problemmode" value="View" />
264: <input type="submit" name="problemmode" value="Edit" />
265: <input type="submit" name="problemmode" value="EditXML" />
266: Random Seed:<input type="text" name="rndseed" width="10" value="'.
267: $rndseed.'" />
268: <input type="submit" name="changerandseed" value="Change" />
269: <input type="submit" name="resetdata" value="Reset Submissions" />
270: <input type="checkbox" name="showallfoils" ';
271: if (defined($ENV{'form.showallfoils'})) { $result.='checked="on"'; }
272: $result.= ' /> Show All Foils
273: <hr />';
274: }
275: # if we are viewing someone else preserve that info
276: if (defined $ENV{'form.grade_symb'}) {
277: foreach my $field ('symb','courseid','domain','username') {
278: $result .= '<input type="hidden" name="grade_'.$field.
279: '" value="'.$ENV{"form.grade_$field"}.'" />'."\n";
280: }
281: }
282: } elsif ($status eq 'SHOW_ANSWER' || $status eq 'CANNOT_ANSWER'
283: || $status eq 'CLOSED') {
284: $result.=$head_tag_start.
285: "<title>$name</title></head>\n$body_tag_start\n";
286: }
287: } elsif ($target eq 'tex') {
288: my $name= &Apache::lonxml::get_param('name',$parstack,$safeeval);
289: if ($name eq '') {
290: $name=&Apache::lonnet::EXT('resource.title');
291: if ($name eq 'con_lost') { $name = ''; }
292: }
293: $Apache::lonhomework::name=$name;
294: my $id = $Apache::inputtags::part;
295: my $duedate = &Apache::lonnet::EXT("resource.$id.duedate");
296: $duedate = POSIX::strftime("%c",localtime($duedate));
297: my $temp_file;
298: my $filename = "/home/httpd/prtspool/$ENV{'user.name'}_$ENV{'user.domain'}_printout.due";
299: if (-e $filename) {
300: $temp_file = Apache::File->new($filename);
301: } else {
302: $temp_file = Apache::File->new('>>'.$filename);
303: }
304: my @due_file_content = <$temp_file>;
305: my $due_file_content = $due_file_content[$#due_file_content];
306: chomp $due_file_content;
307: if ($due_file_content ne $duedate) {
308: $temp_file = Apache::File->new('>'.$filename);
309: print $temp_file "$duedate\n";
310: if (not $ENV{'request.symb'} =~ m/\.page_/) {
311: if(not $duedate=~m/1969/) {
312: $result .= '\begin{document} \noindent\textit{Due date: '.$duedate.'} \vskip 1 mm';
313: } else {
314: $result .= '\begin{document} \noindent \vskip 1 mm';
315: }
316: } else {
317: $result .= '\parbox{\minipagewidth}{\vskip 1mm\textit{Due date: '.$duedate.'} \\\\\\\\';
318: }
319: } else {
320: if (not $ENV{'request.symb'} =~ m/\.page_/) {
321: $result .= '\begin{document} \noindent \vskip 1 mm';
322: } else {
323: $result .= '\parbox{\minipagewidth}{\vskip 1mm \\\\\\\\';
324: }
325: }
326: }
327: } elsif ($target eq 'edit') {
328: $result.=$head_tag_start."</head>".$body_tag_start.
329: '<form name="lonhomework" method="POST" action="'.
330: $ENV{'request.uri'}.'">
331: <input type="hidden" name="submitted" value="edit" />
332: <input type="hidden" name="problemmode" value="Edit" />
333: <input type="submit" name="problemmode" value="Discard Edits and View" />
334: <input type="submit" name="problemmode" value="EditXML" />
335: <input type="submit" name="Undo" value="undo" /> <hr />
336: <input type="submit" name="submit" value="Submit Changes" />
337: <input type="submit" name="submit" value="Submit Changes and View" /><br />
338: ';
339: my $temp=&Apache::edit::insertlist($target,$token);
340: $result.=$temp;
341: } elsif ($target eq 'modified') {
342: $result=$token->[4];
343: $result.=&Apache::edit::handle_insert();
344: } else {
345: # page_start returned a starting result, delete it if we don't need it
346: $result = '';
347: }
348: return $result;
349: }
350:
351: sub end_problem {
352: my ($target,$token,$tagstack,$parstack,$parser,$safeeval)=@_;
353: my $result='';
354: my $status=$Apache::inputtags::status['-1'];
355: if ($target eq 'grade' || $target eq 'web' || $target eq 'answer' ) {
356: if ( $target eq 'grade' && $Apache::inputtags::part eq '0') {
357: # if part is zero, no <part>s existed, so we need to the grading
358: &Apache::inputtags::grade;
359: } elsif ( $target eq 'web' && $Apache::inputtags::part eq '0' &&
360: $status ne 'UNCHECKEDOUT') {
361: # if part is zero, no <part>s existed, so we need show the current
362: # grading status
363: $result.= &Apache::inputtags::gradestatus($Apache::inputtags::part);
364: }
365: if (
366: ($target eq 'web' && ($ENV{'request.state'} ne 'construct')) ||
367: ($target eq 'answer')
368: ) {
369: if ($status eq 'CAN_ANSWER') {
370: $result.="</form></body>\n";
371: } elsif ($status eq 'SHOW_ANSWER' || $status eq 'CANNOT_ANSWER' ||
372: $status eq 'UNCHECKEDOUT' ) {
373: $result.="</body>\n";
374: }
375: $result.=&Apache::lonxml::xmlend();
376: }
377: if ($target eq 'grade') {
378: &Apache::lonhomework::showhash(%Apache::lonhomework::results);
379: &finalize_storage();
380: }
381: } elsif ($target eq 'meta') {
382: if ($Apache::inputtags::part eq '0') {
383: $result=&Apache::response::mandatory_part_meta;
384: }
385: } elsif ($target eq 'edit') {
386: &Apache::lonxml::debug("in end_problem with $target, edit");
387: $result ='<br /><input type="submit" name="submit" value="Submit Changes and Edit" />';
388: $result.='<input type="submit" name="submit" value="Submit Changes and View" />';
389: } elsif ($target eq 'tex') {
390: $result .= '\vskip 0.5mm\noindent\makebox[\textwidth/$number_of_columns][b]{\hrulefill}';
391: if (not $ENV{'request.symb'} =~ m/\.page_/) {
392: $result .= '\end{document} ';
393: } else {
394: $result .= '} ';
395: }
396: }
397: return $result;
398: }
399:
400: sub start_library {
401: my ($target,$token,$tagstack,$parstack,$parser,$safeeval)=@_;
402: my ($result,$head_tag_start,$body_tag_start)=
403: &page_start($target,$token,$tagstack,$parstack,$parser,$safeeval);
404: if ($target eq 'edit') {
405: $result.=$head_tag_start."</head>".$body_tag_start.
406: '<form name="lonhomework" method="POST" action="'.$ENV{'request.uri'}.'">
407: <input type="hidden" name="submitted" value="edit" />
408: <input type="hidden" name="problemmode" value="Edit" />
409: <input type="submit" name="problemmode" value="View" />
410: <input type="submit" name="Undo" value="undo" /> <hr />
411: ';
412: my $temp=&Apache::edit::insertlist($target,$token);
413: $result.=$temp;
414: return $result;
415: }
416: if ($target eq 'modified') {
417: $result=$token->[4];
418: $result.=&Apache::edit::handle_insert();
419: return $result;
420: }
421: return '';
422: }
423:
424: sub end_library {
425: my ($target,$token,$tagstack,$parstack,$parser,$safeeval)=@_;
426: my $result='';
427: if ($target eq 'edit') {
428: $result='<br /><input type="submit" name="submit" value="Submit Changes" />';
429: }
430: return $result;
431: }
432:
433: sub start_block {
434: my ($target,$token,$tagstack,$parstack,$parser,$safeeval)=@_;
435:
436: if ($target eq 'web' || $target eq 'grade' || $target eq 'answer') {
437: my $code = @$parstack[$#$parstack];
438: $code =~ s/\"//g;
439: $code .=';return $condition;';
440: # print "<br />$code<br />";
441: my $result = &Apache::run::run($code,$safeeval);
442: &Apache::lonxml::debug("block :$code: returned :$result:");
443: if ( ! $result ) {
444: my $skip=&Apache::lonxml::get_all_text("/block",$$parser[$#$parser]);
445: &Apache::lonxml::debug("skipping ahead :$skip: $$parser[$#$parser]");
446: }
447: }
448: return "";
449: }
450:
451: sub end_block {
452: return '';
453: }
454:
455: sub start_while {
456: my ($target,$token,$tagstack,$parstack,$parser,$safeeval)=@_;
457:
458: my $code = @$parstack[$#$parstack];
459: $code =~ s/\"//g;
460: $code .=';return $condition;';
461:
462: push( @Apache::structuretags::whileconds, $code);
463: my $result = &Apache::run::run($code,$safeeval);
464: my $bodytext=$$parser[$#$parser]->get_text("/while");
465: push( @Apache::structuretags::whilebody, $bodytext);
466: if ( $result ) {
467: &Apache::lonxml::newparser($parser,\$bodytext);
468: }
469: return "";
470: }
471:
472: sub end_while {
473: my ($target,$token,$tagstack,$parstack,$parser,$safeeval)=@_;
474: my $code = pop @Apache::structuretags::whileconds;
475: my $bodytext = pop @Apache::structuretags::whilebody;
476: my $result = &Apache::run::run($code,$safeeval);
477: if ( $result ) {
478: &Apache::lonxml::newparser($parser,\$bodytext);
479: }
480: return "";
481: }
482:
483: # <randomlist>
484: # <tag1>..</tag1>
485: # <tag2>..</tag2>
486: # <tag3>..</tag3>
487: # ...
488: # </randomlist>
489: sub start_randomlist {
490: my ($target,$token,$tagstack,$parstack,$parser,$safeeval)=@_;
491: my $result;
492: if ($target eq 'answer' || $target eq 'grade' || $target eq 'web') {
493: my $body= &Apache::lonxml::get_all_text("/randomlist",$$parser[$#$parser]);
494: my $b_parser= HTML::TokeParser->new(\$body);
495: my $b_tok;
496: my @randomlist;
497: my $list_item;
498: while($b_tok = $b_parser->get_token() ) {
499: if($b_tok->[0] eq 'S') { # start tag
500: # get content of the tag until matching end tag
501: # get all text upto the matching tag
502: # and push the content into @randomlist
503: $list_item = &Apache::lonxml::get_all_text('/'.$b_tok->[1],$b_parser);
504: $list_item = "$b_tok->[4]"."$list_item"."</$b_tok->[1]>";
505: push(@randomlist,$list_item);
506: # print "<br /><b>START-TAG $b_tok->[1], $b_tok->[4], $list_item</b>";
507: }
508: if($b_tok->[0] eq 'T') { # text
509: # what to do with text in between tags?
510: # print "<b>TEXT $b_tok->[1]</b><br />";
511: }
512: # if($b_tok->[0] eq 'E') { # end tag, should not happen
513: # print "<b>END-TAG $b_tok->[1]</b><br />";
514: # }
515: }
516: my @idx_arr = (0 .. $#randomlist);
517: &Apache::structuretags::shuffle(\@idx_arr);
518: my $bodytext = '';
519: my $show=$#randomlist;
520: my $showarg=&Apache::lonxml::get_param('show',$parstack,$safeeval);
521: $showarg--;
522: if ( ($showarg >= 0) && ($showarg < $show) ) { $show = $showarg; }
523: for(0 .. $show) {
524: $bodytext .= "$randomlist[ $idx_arr[$_] ]";
525: }
526: &Apache::lonxml::newparser($parser,\$bodytext);
527: } elsif ($target eq 'edit' ) {
528: $result .= &Apache::edit::tag_start($target,$token);
529: $result .= &Apache::edit::text_arg('Maximum Tags to Show:','show',$token,5);
530: $result .= &Apache::edit::end_row().&Apache::edit::start_spanning_row();
531: } elsif ($target eq 'modified' ) {
532: my $constructtag=&Apache::edit::get_new_args($token,$parstack,$safeeval,
533: 'show');
534: if ($constructtag) { $result = &Apache::edit::rebuild_tag($token); }
535: }
536: return $result;
537: }
538:
539: sub shuffle {
540: my $a=shift;
541: my $i;
542: if (defined(@$a)) {
543: &Apache::response::setrandomnumber();
544: for($i=@$a;--$i;) {
545: my $j=int rand($i+1);
546: next if $i == $j;
547: @$a[$i,$j] = @$a[$j,$i];
548: }
549: }
550: }
551:
552: sub end_randomlist {
553: my ($target,$token,$tagstack,$parstack,$parser,$safeeval)=@_;
554: my $result;
555: if ($target eq 'edit' ) {
556: $result=&Apache::edit::tag_end($target,$token,'End Randomly Parsed Block');
557: }
558: return $result;
559: }
560:
561: sub start_part {
562: my ($target,$token,$tagstack,$parstack,$parser,$safeeval)=@_;
563: my $result='';
564: my $id= &Apache::lonxml::get_param('id',$parstack,$safeeval);
565: if ($id eq '') { $id = $Apache::lonxml::curdepth; }
566: $Apache::inputtags::part=$id;
567: @Apache::inputtags::responselist = ();
568: @Apache::inputtags::previous=();
569: if ($target eq 'meta') {
570: return &Apache::response::mandatory_part_meta;
571: } elsif ($target eq 'web' || $target eq 'grade' || $target eq 'answer' || $target eq 'tex') {
572: my ($status,$accessmsg) = &Apache::lonhomework::check_access($id);
573: push (@Apache::inputtags::status,$status);
574: my $expression='$external::datestatus="'.$status.'";';
575: $expression.='$external::gradestatus="'.$Apache::lonhomework::history{"resource.$id.solved"}.'";';
576: &Apache::run::run($expression,$safeeval);
577: if ( $status eq 'CLOSED' ) {
578: my $bodytext=&Apache::lonxml::get_all_text("/part",$$parser[$#$parser]);
579: if ( $target eq "web" ) {
580: $result="<br />Part is not open to be viewed. It $accessmsg<br />";
581: } elsif ( $target eq 'tex' ) {
582: $result="\\vskip 0 mm Part is not open to be viewed. It $accessmsg \\\\";
583: }
584: } else {
585: if ($target eq 'tex') {
586: $result='\vskip 0 mm';
587: }
588: }
589: }
590: return $result;
591: }
592:
593: sub end_part {
594: my ($target,$token,$tagstack,$parstack,$parser,$safeeval)=@_;
595: &Apache::lonxml::debug("in end_part $target ");
596: my $status=$Apache::inputtags::status['-1'];
597: pop @Apache::inputtags::status;
598: if ( $target eq 'meta' ) { return ''; }
599: if ( $target eq 'grade' && $status eq 'CAN_ANSWER') {
600: return &Apache::inputtags::grade;
601: }
602: if ($target eq 'web') {
603: return &Apache::inputtags::gradestatus($Apache::inputtags::part);
604: }
605: return '';
606: }
607:
608: sub start_preduedate {
609: my ($target,$token,$tagstack,$parstack,$parser,$safeeval)=@_;
610: if ($target eq 'web' || $target eq 'grade' || $target eq 'answer') {
611: if ($Apache::inputtags::status['-1'] ne 'CAN_ANSWER' &&
612: $Apache::inputtags::status['-1'] ne 'CANNOT_ANSWER' ) {
613: &Apache::lonxml::get_all_text("/preduedate",$$parser[$#$parser]);
614: }
615: }
616: return '';
617: }
618:
619: sub end_preduedate {
620: return '';
621: }
622:
623: sub start_postanswerdate {
624: my ($target,$token,$tagstack,$parstack,$parser,$safeeval)=@_;
625: if ($target eq 'web' || $target eq 'grade') {
626: if ($Apache::inputtags::status['-1'] ne 'SHOW_ANSWER') {
627: &Apache::lonxml::get_all_text("/postanswerdate",$$parser[$#$parser]);
628: }
629: } elsif ($target eq 'tex') {
630: return '\vskip 0 mm \noindent';
631: }
632: return '';
633: }
634:
635: sub end_postanswerdate {
636: return '';
637: }
638:
639: sub start_notsolved {
640: my ($target,$token,$tagstack,$parstack,$parser,$safeeval)=@_;
641: if ($target eq 'web' || $target eq 'grade' || $target eq 'answer') {
642: my $gradestatus=$Apache::lonhomework::history{"resource.$Apache::inputtags::part.solved"};
643: &Apache::lonxml::debug("not solved has :$gradestatus:");
644: if ($gradestatus =~ /^correct/) {
645: &Apache::lonxml::debug("skipping");
646: &Apache::lonxml::get_all_text("/notsolved",$$parser[$#$parser]);
647: }
648: }
649: return '';
650: }
651:
652: sub end_notsolved {
653: return '';
654: }
655:
656: sub start_solved {
657: my ($target,$token,$tagstack,$parstack,$parser,$safeeval)=@_;
658: if ($target eq 'web' || $target eq 'grade' || $target eq 'answer') {
659: my $gradestatus=$Apache::lonhomework::history{"resource.$Apache::inputtags::part.solved"};
660: if ($gradestatus !~ /^correct/) {
661: &Apache::lonxml::get_all_text("/solved",$$parser[$#$parser]);
662: }
663: }
664: return '';
665: }
666:
667: sub end_solved {
668: return '';
669: }
670:
671: sub start_startouttext {
672: my ($target,$token,$tagstack,$parstack,$parser,$safeeval)=@_;
673: my @result=(''.'');
674: if ($target eq 'edit' || $target eq 'modified' ) { @result=('','no'); }
675: return (@result);
676: }
677: sub end_startouttext {
678: my ($target,$token,$tagstack,$parstack,$parser,$safeeval)=@_;
679: my $result='';
680: my $text='';
681:
682: if ($target eq 'edit') {
683: $text=&Apache::lonxml::get_all_text("endouttext",$$parser[-1]);
684: $result.=&Apache::edit::start_table($token)."<tr><td>Text Block</td>
685: <td>Delete:".
686: &Apache::edit::deletelist($target,$token)
687: ."</td>
688: <td>".
689: &Apache::edit::insertlist($target,$token).
690: &Apache::edit::end_row().&Apache::edit::start_spanning_row()."\n".
691: &Apache::edit::editfield($token->[1],$text,"",50,4);
692: }
693: if ($target eq 'modified') {
694: $text=&Apache::lonxml::get_all_text("endouttext",$$parser['-1']);
695: $result='<startouttext />'.&Apache::edit::modifiedfield();
696: }
697: if ($target eq 'tex') {
698: $result .= '\noindent ';
699: }
700: return $result;
701: }
702: sub start_endouttext {
703: my ($target,$token,$tagstack,$parstack,$parser,$safeeval)=@_;
704: my $result='';
705: if ($target eq "edit" ) { $result="</td></tr>".&Apache::edit::end_table()."\n"; }
706: if ($target eq "modified") { $result='<endouttext />'; }
707: return $result;
708: }
709: sub end_endouttext {
710: my ($target,$token,$tagstack,$parstack,$parser,$safeeval)=@_;
711: my @result=('','');
712: if ($target eq "edit" || $target eq 'modified') { @result=('','no'); }
713: return (@result);
714: }
715: sub delete_startouttext {
716: my ($target,$token,$tagstack,$parstack,$parser,$safeeval)=@_;
717: # my $text=&Apache::lonxml::get_all_text("endouttext",$$parser['-1']);
718: my $text=$$parser['-1']->get_text("/endouttext");
719: my $ntoken=$$parser['-1']->get_token();
720: &Apache::lonxml::debug("Deleting :$text: and :$ntoken->[0]:$ntoken->[1]:$ntoken->[2]: for startouttext");
721: &Apache::lonxml::end_tag($tagstack,$parstack,$ntoken);
722: # Deleting 2 parallel tag pairs, but we need the numbers later to look like
723: # they did the last time round
724: &Apache::lonxml::increasedepth($ntoken);
725: &Apache::lonxml::decreasedepth($ntoken);
726: return 1;
727: }
728:
729: 1;
730: __END__
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