1: # The LearningOnline Network with CAPA
2: # definition of tags that give a structure to a document
3: #
4: # $Id: structuretags.pm,v 1.103 2002/08/07 17:24:35 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($duedate eq 'Wed 31 Dec 1969 07:00:00 PM EDT') {$duedate = '';}
311: if (not $ENV{'request.symb'} =~ m/\.page_/) {
312: $result .= '\begin{document} \noindent\textit{Due date: '.$duedate.'} \vskip 1 mm';
313: } else {
314: $result .= '\parbox{\minipagewidth}{\vskip 1mm\textit{Due date: '.$duedate.'} \\\\\\\\';
315: }
316: } else {
317: if (not $ENV{'request.symb'} =~ m/\.page_/) {
318: $result .= '\begin{document} \noindent \vskip 1 mm';
319: } else {
320: $result .= '\parbox{\minipagewidth}{\vskip 1mm \\\\\\\\';
321: }
322: }
323: }
324: } elsif ($target eq 'edit') {
325: $result.=$head_tag_start."</head>".$body_tag_start.
326: '<form name="lonhomework" method="POST" action="'.
327: $ENV{'request.uri'}.'">
328: <input type="hidden" name="submitted" value="edit" />
329: <input type="hidden" name="problemmode" value="Edit" />
330: <input type="submit" name="problemmode" value="Discard Edits and View" />
331: <input type="submit" name="problemmode" value="EditXML" />
332: <input type="submit" name="Undo" value="undo" /> <hr />
333: <input type="submit" name="submit" value="Submit Changes" />
334: <input type="submit" name="submit" value="Submit Changes and View" /><br />
335: ';
336: my $temp=&Apache::edit::insertlist($target,$token);
337: $result.=$temp;
338: } elsif ($target eq 'modified') {
339: $result=$token->[4];
340: $result.=&Apache::edit::handle_insert();
341: } else {
342: # page_start returned a starting result, delete it if we don't need it
343: $result = '';
344: }
345: return $result;
346: }
347:
348: sub end_problem {
349: my ($target,$token,$tagstack,$parstack,$parser,$safeeval)=@_;
350: my $result='';
351: my $status=$Apache::inputtags::status['-1'];
352: if ($target eq 'grade' || $target eq 'web' || $target eq 'answer' ) {
353: if ( $target eq 'grade' && $Apache::inputtags::part eq '0') {
354: # if part is zero, no <part>s existed, so we need to the grading
355: &Apache::inputtags::grade;
356: } elsif ( $target eq 'web' && $Apache::inputtags::part eq '0' &&
357: $status ne 'UNCHECKEDOUT') {
358: # if part is zero, no <part>s existed, so we need show the current
359: # grading status
360: $result.= &Apache::inputtags::gradestatus($Apache::inputtags::part);
361: }
362: if (
363: ($target eq 'web' && ($ENV{'request.state'} ne 'construct')) ||
364: ($target eq 'answer')
365: ) {
366: if ($status eq 'CAN_ANSWER') {
367: $result.="</form></body>\n";
368: } elsif ($status eq 'SHOW_ANSWER' || $status eq 'CANNOT_ANSWER' ||
369: $status eq 'UNCHECKEDOUT' ) {
370: $result.="</body>\n";
371: }
372: $result.=&Apache::lonxml::xmlend();
373: }
374: if ($target eq 'grade') {
375: &Apache::lonhomework::showhash(%Apache::lonhomework::results);
376: &finalize_storage();
377: }
378: } elsif ($target eq 'meta') {
379: if ($Apache::inputtags::part eq '0') {
380: $result=&Apache::response::mandatory_part_meta;
381: }
382: } elsif ($target eq 'edit') {
383: &Apache::lonxml::debug("in end_problem with $target, edit");
384: $result ='<br /><input type="submit" name="submit" value="Submit Changes and Edit" />';
385: $result.='<input type="submit" name="submit" value="Submit Changes and View" />';
386: } elsif ($target eq 'tex') {
387: $result .= '\vskip 0.5mm\noindent\makebox[\textwidth/$number_of_columns][b]{\hrulefill}';
388: if (not $ENV{'request.symb'} =~ m/\.page_/) {
389: $result .= '\end{document} ';
390: } else {
391: $result .= '} ';
392: }
393: }
394: return $result;
395: }
396:
397: sub start_library {
398: my ($target,$token,$tagstack,$parstack,$parser,$safeeval)=@_;
399: my ($result,$head_tag_start,$body_tag_start)=
400: &page_start($target,$token,$tagstack,$parstack,$parser,$safeeval);
401: if ($target eq 'edit') {
402: $result.=$head_tag_start."</head>".$body_tag_start.
403: '<form name="lonhomework" method="POST" action="'.$ENV{'request.uri'}.'">
404: <input type="hidden" name="submitted" value="edit" />
405: <input type="hidden" name="problemmode" value="Edit" />
406: <input type="submit" name="problemmode" value="View" />
407: <input type="submit" name="Undo" value="undo" /> <hr />
408: ';
409: my $temp=&Apache::edit::insertlist($target,$token);
410: $result.=$temp;
411: return $result;
412: }
413: if ($target eq 'modified') {
414: $result=$token->[4];
415: $result.=&Apache::edit::handle_insert();
416: return $result;
417: }
418: return '';
419: }
420:
421: sub end_library {
422: my ($target,$token,$tagstack,$parstack,$parser,$safeeval)=@_;
423: my $result='';
424: if ($target eq 'edit') {
425: $result='<br /><input type="submit" name="submit" value="Submit Changes" />';
426: }
427: return $result;
428: }
429:
430: sub start_block {
431: my ($target,$token,$tagstack,$parstack,$parser,$safeeval)=@_;
432:
433: if ($target eq 'web' || $target eq 'grade' || $target eq 'answer') {
434: my $code = @$parstack[$#$parstack];
435: $code =~ s/\"//g;
436: $code .=';return $condition;';
437: # print "<br />$code<br />";
438: my $result = &Apache::run::run($code,$safeeval);
439: &Apache::lonxml::debug("block :$code: returned :$result:");
440: if ( ! $result ) {
441: my $skip=&Apache::lonxml::get_all_text("/block",$$parser[$#$parser]);
442: &Apache::lonxml::debug("skipping ahead :$skip: $$parser[$#$parser]");
443: }
444: }
445: return "";
446: }
447:
448: sub end_block {
449: return '';
450: }
451:
452: sub start_while {
453: my ($target,$token,$tagstack,$parstack,$parser,$safeeval)=@_;
454:
455: my $code = @$parstack[$#$parstack];
456: $code =~ s/\"//g;
457: $code .=';return $condition;';
458:
459: push( @Apache::structuretags::whileconds, $code);
460: my $result = &Apache::run::run($code,$safeeval);
461: my $bodytext=$$parser[$#$parser]->get_text("/while");
462: push( @Apache::structuretags::whilebody, $bodytext);
463: if ( $result ) {
464: &Apache::lonxml::newparser($parser,\$bodytext);
465: }
466: return "";
467: }
468:
469: sub end_while {
470: my ($target,$token,$tagstack,$parstack,$parser,$safeeval)=@_;
471: my $code = pop @Apache::structuretags::whileconds;
472: my $bodytext = pop @Apache::structuretags::whilebody;
473: my $result = &Apache::run::run($code,$safeeval);
474: if ( $result ) {
475: &Apache::lonxml::newparser($parser,\$bodytext);
476: }
477: return "";
478: }
479:
480: # <randomlist>
481: # <tag1>..</tag1>
482: # <tag2>..</tag2>
483: # <tag3>..</tag3>
484: # ...
485: # </randomlist>
486: sub start_randomlist {
487: my ($target,$token,$tagstack,$parstack,$parser,$safeeval)=@_;
488: my $result;
489: if ($target eq 'answer' || $target eq 'grade' || $target eq 'web') {
490: my $body= &Apache::lonxml::get_all_text("/randomlist",$$parser[$#$parser]);
491: my $b_parser= HTML::TokeParser->new(\$body);
492: my $b_tok;
493: my @randomlist;
494: my $list_item;
495: while($b_tok = $b_parser->get_token() ) {
496: if($b_tok->[0] eq 'S') { # start tag
497: # get content of the tag until matching end tag
498: # get all text upto the matching tag
499: # and push the content into @randomlist
500: $list_item = &Apache::lonxml::get_all_text('/'.$b_tok->[1],$b_parser);
501: $list_item = "$b_tok->[4]"."$list_item"."</$b_tok->[1]>";
502: push(@randomlist,$list_item);
503: # print "<br /><b>START-TAG $b_tok->[1], $b_tok->[4], $list_item</b>";
504: }
505: if($b_tok->[0] eq 'T') { # text
506: # what to do with text in between tags?
507: # print "<b>TEXT $b_tok->[1]</b><br />";
508: }
509: # if($b_tok->[0] eq 'E') { # end tag, should not happen
510: # print "<b>END-TAG $b_tok->[1]</b><br />";
511: # }
512: }
513: my @idx_arr = (0 .. $#randomlist);
514: &Apache::structuretags::shuffle(\@idx_arr);
515: my $bodytext = '';
516: my $show=$#randomlist;
517: my $showarg=&Apache::lonxml::get_param('show',$parstack,$safeeval);
518: $showarg--;
519: if ( ($showarg >= 0) && ($showarg < $show) ) { $show = $showarg; }
520: for(0 .. $show) {
521: $bodytext .= "$randomlist[ $idx_arr[$_] ]";
522: }
523: &Apache::lonxml::newparser($parser,\$bodytext);
524: } elsif ($target eq 'edit' ) {
525: $result .= &Apache::edit::tag_start($target,$token);
526: $result .= &Apache::edit::text_arg('Maximum Tags to Show:','show',$token,5);
527: $result .= &Apache::edit::end_row().&Apache::edit::start_spanning_row();
528: } elsif ($target eq 'modified' ) {
529: my $constructtag=&Apache::edit::get_new_args($token,$parstack,$safeeval,
530: 'show');
531: if ($constructtag) { $result = &Apache::edit::rebuild_tag($token); }
532: }
533: return $result;
534: }
535:
536: sub shuffle {
537: my $a=shift;
538: my $i;
539: if (defined(@$a)) {
540: &Apache::response::setrandomnumber();
541: for($i=@$a;--$i;) {
542: my $j=int rand($i+1);
543: next if $i == $j;
544: @$a[$i,$j] = @$a[$j,$i];
545: }
546: }
547: }
548:
549: sub end_randomlist {
550: my ($target,$token,$tagstack,$parstack,$parser,$safeeval)=@_;
551: my $result;
552: if ($target eq 'edit' ) {
553: $result=&Apache::edit::tag_end($target,$token,'End Randomly Parsed Block');
554: }
555: return $result;
556: }
557:
558: sub start_part {
559: my ($target,$token,$tagstack,$parstack,$parser,$safeeval)=@_;
560: my $result='';
561: my $id= &Apache::lonxml::get_param('id',$parstack,$safeeval);
562: if ($id eq '') { $id = $Apache::lonxml::curdepth; }
563: $Apache::inputtags::part=$id;
564: @Apache::inputtags::responselist = ();
565: @Apache::inputtags::previous=();
566: if ($target eq 'meta') {
567: return &Apache::response::mandatory_part_meta;
568: } elsif ($target eq 'web' || $target eq 'grade' || $target eq 'answer' || $target eq 'tex') {
569: my ($status,$accessmsg) = &Apache::lonhomework::check_access($id);
570: push (@Apache::inputtags::status,$status);
571: my $expression='$external::datestatus="'.$status.'";';
572: $expression.='$external::gradestatus="'.$Apache::lonhomework::history{"resource.$id.solved"}.'";';
573: &Apache::run::run($expression,$safeeval);
574: if ( $status eq 'CLOSED' ) {
575: my $bodytext=&Apache::lonxml::get_all_text("/part",$$parser[$#$parser]);
576: if ( $target eq "web" ) {
577: $result="<br />Part is not open to be viewed. It $accessmsg<br />";
578: } elsif ( $target eq 'tex' ) {
579: $result="\\vskip 0 mm Part is not open to be viewed. It $accessmsg \\\\";
580: }
581: } else {
582: if ($target eq 'tex') {
583: $result='\vskip 0 mm';
584: }
585: }
586: }
587: return $result;
588: }
589:
590: sub end_part {
591: my ($target,$token,$tagstack,$parstack,$parser,$safeeval)=@_;
592: &Apache::lonxml::debug("in end_part $target ");
593: my $status=$Apache::inputtags::status['-1'];
594: pop @Apache::inputtags::status;
595: if ( $target eq 'meta' ) { return ''; }
596: if ( $target eq 'grade' && $status eq 'CAN_ANSWER') {
597: return &Apache::inputtags::grade;
598: }
599: if ($target eq 'web') {
600: return &Apache::inputtags::gradestatus($Apache::inputtags::part);
601: }
602: return '';
603: }
604:
605: sub start_preduedate {
606: my ($target,$token,$tagstack,$parstack,$parser,$safeeval)=@_;
607: if ($target eq 'web' || $target eq 'grade' || $target eq 'answer') {
608: if ($Apache::inputtags::status['-1'] ne 'CAN_ANSWER' &&
609: $Apache::inputtags::status['-1'] ne 'CANNOT_ANSWER' ) {
610: &Apache::lonxml::get_all_text("/preduedate",$$parser[$#$parser]);
611: }
612: }
613: return '';
614: }
615:
616: sub end_preduedate {
617: return '';
618: }
619:
620: sub start_postanswerdate {
621: my ($target,$token,$tagstack,$parstack,$parser,$safeeval)=@_;
622: if ($target eq 'web' || $target eq 'grade') {
623: if ($Apache::inputtags::status['-1'] ne 'SHOW_ANSWER') {
624: &Apache::lonxml::get_all_text("/postanswerdate",$$parser[$#$parser]);
625: }
626: }
627: return '';
628: }
629:
630: sub end_postanswerdate {
631: return '';
632: }
633:
634: sub start_notsolved {
635: my ($target,$token,$tagstack,$parstack,$parser,$safeeval)=@_;
636: if ($target eq 'web' || $target eq 'grade' || $target eq 'answer') {
637: my $gradestatus=$Apache::lonhomework::history{"resource.$Apache::inputtags::part.solved"};
638: &Apache::lonxml::debug("not solved has :$gradestatus:");
639: if ($gradestatus =~ /^correct/) {
640: &Apache::lonxml::debug("skipping");
641: &Apache::lonxml::get_all_text("/notsolved",$$parser[$#$parser]);
642: }
643: }
644: return '';
645: }
646:
647: sub end_notsolved {
648: return '';
649: }
650:
651: sub start_solved {
652: my ($target,$token,$tagstack,$parstack,$parser,$safeeval)=@_;
653: if ($target eq 'web' || $target eq 'grade' || $target eq 'answer') {
654: my $gradestatus=$Apache::lonhomework::history{"resource.$Apache::inputtags::part.solved"};
655: if ($gradestatus !~ /^correct/) {
656: &Apache::lonxml::get_all_text("/solved",$$parser[$#$parser]);
657: }
658: }
659: return '';
660: }
661:
662: sub end_solved {
663: return '';
664: }
665:
666: sub start_startouttext {
667: my ($target,$token,$tagstack,$parstack,$parser,$safeeval)=@_;
668: my @result=(''.'');
669: if ($target eq 'edit' || $target eq 'modified' ) { @result=('','no'); }
670: return (@result);
671: }
672: sub end_startouttext {
673: my ($target,$token,$tagstack,$parstack,$parser,$safeeval)=@_;
674: my $result='';
675: my $text='';
676:
677: if ($target eq 'edit') {
678: $text=&Apache::lonxml::get_all_text("endouttext",$$parser[-1]);
679: $result.=&Apache::edit::start_table($token)."<tr><td>Text Block</td>
680: <td>Delete:".
681: &Apache::edit::deletelist($target,$token)
682: ."</td>
683: <td>".
684: &Apache::edit::insertlist($target,$token).
685: &Apache::edit::end_row().&Apache::edit::start_spanning_row()."\n".
686: &Apache::edit::editfield($token->[1],$text,"",50,4);
687: }
688: if ($target eq 'modified') {
689: $text=&Apache::lonxml::get_all_text("endouttext",$$parser['-1']);
690: $result='<startouttext />'.&Apache::edit::modifiedfield();
691: }
692: if ($target eq 'tex') {
693: $result .= '\noindent ';
694: }
695: return $result;
696: }
697: sub start_endouttext {
698: my ($target,$token,$tagstack,$parstack,$parser,$safeeval)=@_;
699: my $result='';
700: if ($target eq "edit" ) { $result="</td></tr>".&Apache::edit::end_table()."\n"; }
701: if ($target eq "modified") { $result='<endouttext />'; }
702: return $result;
703: }
704: sub end_endouttext {
705: my ($target,$token,$tagstack,$parstack,$parser,$safeeval)=@_;
706: my @result=('','');
707: if ($target eq "edit" || $target eq 'modified') { @result=('','no'); }
708: return (@result);
709: }
710: sub delete_startouttext {
711: my ($target,$token,$tagstack,$parstack,$parser,$safeeval)=@_;
712: # my $text=&Apache::lonxml::get_all_text("endouttext",$$parser['-1']);
713: my $text=$$parser['-1']->get_text("/endouttext");
714: my $ntoken=$$parser['-1']->get_token();
715: &Apache::lonxml::debug("Deleting :$text: and :$ntoken->[0]:$ntoken->[1]:$ntoken->[2]: for startouttext");
716: &Apache::lonxml::end_tag($tagstack,$parstack,$ntoken);
717: # Deleting 2 parallel tag pairs, but we need the numbers later to look like
718: # they did the last time round
719: &Apache::lonxml::increasedepth($ntoken);
720: &Apache::lonxml::decreasedepth($ntoken);
721: return 1;
722: }
723:
724: 1;
725: __END__
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