1: # The LearningOnline Network with CAPA
2: # definition of tags that give a structure to a document
3: #
4: # $Id: structuretags.pm,v 1.89 2002/04/10 19:58:19 albertel 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:
37: BEGIN {
38: &Apache::lonxml::register('Apache::structuretags',('block','while','randomlist','problem','library','web','tex','part','preduedate','postanswerdate','solved','notsolved','startouttext','endouttext'));
39: # &Apache::lonxml::register_insert('problem','',('part','postanswerdate','preduedate'))
40: }
41:
42: sub start_web {
43: my ($target,$token,$tagstack,$parstack,$parser,$safeeval)=@_;
44: my $bodytext=&Apache::lonxml::get_all_text("/web",$$parser[$#$parser]);
45: if ($target eq 'web') {
46: return $bodytext;
47: }
48: return '';
49: }
50:
51: sub end_web {
52: return '';
53: }
54:
55: sub start_tex {
56: my ($target,$token,$tagstack,$parstack,$parser,$safeeval)=@_;
57: my $bodytext=&Apache::lonxml::get_all_text("/tex",$$parser[$#$parser]);
58: if ($target eq 'tex') {
59: return $bodytext
60: }
61: return '';
62: }
63:
64: sub end_tex {
65: return '';
66: }
67:
68: sub page_start {
69: my ($target,$token,$tagstack,$parstack,$parser,$safeeval)=@_;
70: my %found;
71: foreach my $taginside ($tagstack) {
72: foreach my $taglookedfor ('html','body','form') {
73: if ($taginside =~ /^$taglookedfor$/i) { $found{$taglookedfor} = 1; }
74: }
75: }
76:
77: my $result;
78: my $head_tag_start;
79: if (!defined($found{'html'})) {
80: $result=&Apache::londefdef::start_html($target,$token,$tagstack,$parstack,
81: $parser,$safeeval);
82: $head_tag_start='<head>'.&Apache::lonxml::registerurl(undef,$target);
83: }
84: my $body_tag_start;
85: if (!defined($found{'body'})) {
86: $body_tag_start='<body onLoad="'.&Apache::lonxml::loadevents().'" '.
87: 'onUnload="'.&Apache::lonxml::unloadevents().'" ';
88: my $background=&Apache::lonxml::get_param('background',$parstack,$safeeval);
89: if ($background) {
90: $Apache::lonxml::extlinks[$#Apache::lonxml::extlinks+1]=
91: $background;
92: $body_tag_start.='background="'.$background.'" ';
93: } else {
94: my $bgcolor=&Apache::lonxml::get_param('bgcolor',$parstack,$safeeval);
95: if ($bgcolor) {
96: $body_tag_start.='bgcolor="'.$bgcolor.'" ';
97: } else {
98: $body_tag_start.='bgcolor="#ffffff"';
99: }
100: }
101: $body_tag_start.='>';
102: }
103: return ($result,$head_tag_start,$body_tag_start);
104: }
105:
106: sub initialize_storage {
107: %Apache::lonhomework::results=();
108: my ($symb,$courseid,$domain,$name) = &Apache::lonxml::whichuser();
109: if ($ENV{'request.state'} eq 'construct') {
110: %Apache::lonhomework::history=
111: &Apache::lonnet::tmprestore($ENV{'request.uri'},'',$domain,$name);
112: my ($temp)=keys %Apache::lonhomework::history ;
113: &Apache::lonxml::debug("Return message of $temp");
114: } else {
115: %Apache::lonhomework::history=
116: &Apache::lonnet::restore($symb,$courseid,$domain,$name);
117: }
118: #ignore error conditions
119: my ($temp)=keys %Apache::lonhomework::history ;
120: if ($temp =~ m/^error:.*/) { %Apache::lonhomework::history=(); }
121: }
122:
123: # -------------------------------------------------------------finalize_storage
124: # Stores away the result has to a student's environment
125: # checks form.grade_ for specific values, other wises stores
126: # to the running users environment
127: sub finalize_storage {
128: my $result;
129: my ($temp) = keys %Apache::lonhomework::results;
130: if ( $temp ne '' ) {
131: my ($symb,$courseid,$domain,$name) = &Apache::lonxml::whichuser();
132: if ($ENV{'request.state'} eq 'construct') {
133: $result=&Apache::lonnet::tmpstore(\%Apache::lonhomework::results,
134: $ENV{'request.uri'},'',$domain,$name);
135: &Apache::lonxml::debug('Construct Store return message:'.$result);
136: } else {
137: $result=&Apache::lonnet::cstore(\%Apache::lonhomework::results,
138: $symb,$courseid,$domain,$name);
139: &Apache::lonxml::debug('Store return message:'.$result);
140: }
141: }
142: return $result;
143: }
144:
145: sub checkout_msg {
146: return (<<ENDCHECKOUT);
147: <h2>The resource needs to be checked out</h2>
148: As a resource gets checked out, a unique timestamped ID is given to it, and a
149: permanent record is left in the system.<p />
150: <font color=red>
151: Checking out resources is subject to course policies, and may exclude future
152: credit even if done erroneously.<p />
153: </font>
154: <form method=post>
155: <input type=button name="doescheckout"
156: value="Check out Exam for Viewing"
157: onClick="if (confirm('Check out Exam?')) { this.form.submit(); }" />
158: </form>
159: ENDCHECKOUT
160: }
161:
162: sub start_problem {
163: my ($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:
206:
207: if ($target eq 'web' || $target eq 'grade' || $target eq 'answer') {
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: <hr />';
271: }
272: # if we are viewing someone else preserve that info
273: if (defined $ENV{'form.grade_symb'}) {
274: foreach my $field ('symb','courseid','domain','username') {
275: $result .= '<input type="hidden" name="grade_'.$field.
276: '" value="'.$ENV{"form.grade_$field"}.'" />'."\n";
277: }
278: }
279: } elsif ($status eq 'SHOW_ANSWER' || $status eq 'CANNOT_ANSWER'
280: || $status eq 'CLOSED') {
281: $result.=$head_tag_start.
282: "<title>$name</title></head>\n$body_tag_start\n";
283: }
284: }
285: } elsif ($target eq 'edit') {
286: $result.=$head_tag_start."</head>".$body_tag_start.
287: '<form name="lonhomework" method="POST" action="'.
288: $ENV{'request.uri'}.'">
289: <input type="hidden" name="submitted" value="edit" />
290: <input type="hidden" name="problemmode" value="Edit" />
291: <input type="submit" name="problemmode" value="View" />
292: <input type="submit" name="problemmode" value="EditXML" />
293: <input type="submit" name="Undo" value="undo" /> <hr />
294: <input type="submit" name="submit" value="Submit Changes" /><br />
295: ';
296: my $temp=&Apache::edit::insertlist($target,$token);
297: $result.=$temp;
298: } elsif ($target eq 'modified') {
299: $result=$token->[4];
300: $result.=&Apache::edit::handle_insert();
301: } elsif ($target eq 'tex') {
302: $result .= '\begin{document} ';
303: } else {
304: # page_start returned a starting result, delete it if we don't need it
305: $result = '';
306: }
307: return $result;
308: }
309:
310: sub end_problem {
311: my ($target,$token,$tagstack,$parstack,$parser,$safeeval)=@_;
312: my $result='';
313: my $status=$Apache::inputtags::status['-1'];
314: if ($target eq 'grade' || $target eq 'web' || $target eq 'answer' ) {
315: if ( $target eq 'grade' && $Apache::inputtags::part eq '0') {
316: # if part is zero, no <part>s existed, so we need to the grading
317: &Apache::inputtags::grade;
318: } elsif ( $target eq 'web' && $Apache::inputtags::part eq '0') {
319: # if part is zero, no <part>s existed, so we need show the current
320: # grading status
321: $result.= &Apache::inputtags::gradestatus($Apache::inputtags::part);
322: }
323: if (
324: ($target eq 'web' && ($ENV{'request.state'} ne 'construct')) ||
325: ($target eq 'answer')
326: ) {
327: if ($status eq 'CAN_ANSWER') {
328: $result.="</form></body>\n";
329: } elsif ($status eq 'SHOW_ANSWER' || $status eq 'CANNOT_ANSWER') {
330: $result.="</body>\n";
331: }
332: $result.=&Apache::lonxml::xmlend();
333: }
334: if ($target eq 'grade') {
335: &Apache::lonhomework::showhash(%Apache::lonhomework::results);
336: &finalize_storage();
337: }
338: } elsif ($target eq 'meta') {
339: if ($Apache::inputtags::part eq '0') {
340: $result=&Apache::response::mandatory_part_meta;
341: } else {
342: # there were intervening parts need to set the global temporarily
343: # and only need the package reference
344: my $temp=$Apache::inputtags::part;
345: $Apache::inputtags::part=0;
346: $result=&Apache::response::meta_package_write('part');
347: $Apache::inputtags::part=$temp;
348: }
349: } elsif ($target eq 'edit') {
350: &Apache::lonxml::debug("in end_problem with $target, edit");
351: $result='<br /><input type="submit" name="submit" value="Submit Changes" />';
352: } elsif ($target eq 'tex') {
353: $result .= '\vskip 0.5mm\noindent\makebox[9.0cm][b]{\hrulefill}\end{document}';
354: }
355: return $result;
356: }
357:
358: sub start_library {
359: my ($target,$token,$tagstack,$parstack,$parser,$safeeval)=@_;
360: my ($result,$head_tag_start,$body_tag_start)=
361: &page_start($target,$token,$tagstack,$parstack,$parser,$safeeval);
362: if ($target eq 'edit') {
363: $result.=$head_tag_start."</head>".$body_tag_start.
364: '<form name="lonhomework" method="POST" action="'.$ENV{'request.uri'}.'">
365: <input type="hidden" name="submitted" value="edit" />
366: <input type="hidden" name="problemmode" value="Edit" />
367: <input type="submit" name="problemmode" value="View" />
368: <input type="submit" name="Undo" value="undo" /> <hr />
369: ';
370: my $temp=&Apache::edit::insertlist($target,$token);
371: $result.=$temp;
372: return $result;
373: }
374: if ($target eq 'modified') {
375: $result=$token->[4];
376: $result.=&Apache::edit::handle_insert();
377: return $result;
378: }
379: return '';
380: }
381:
382: sub end_library {
383: my ($target,$token,$tagstack,$parstack,$parser,$safeeval)=@_;
384: my $result='';
385: if ($target eq 'edit') {
386: $result='<br /><input type="submit" name="submit" value="Submit Changes" />';
387: }
388: return $result;
389: }
390:
391: sub start_block {
392: my ($target,$token,$tagstack,$parstack,$parser,$safeeval)=@_;
393:
394: if ($target eq 'web' || $target eq 'grade' || $target eq 'answer') {
395: my $code = @$parstack[$#$parstack];
396: $code =~ s/\"//g;
397: $code .=';return $condition;';
398: # print "<br />$code<br />";
399: my $result = &Apache::run::run($code,$safeeval);
400: &Apache::lonxml::debug("block :$code: returned :$result:");
401: if ( ! $result ) {
402: my $skip=&Apache::lonxml::get_all_text("/block",$$parser[$#$parser]);
403: &Apache::lonxml::debug("skipping ahead :$skip: $$parser[$#$parser]");
404: }
405: }
406: return "";
407: }
408:
409: sub end_block {
410: return '';
411: }
412:
413: sub start_while {
414: my ($target,$token,$tagstack,$parstack,$parser,$safeeval)=@_;
415:
416: my $code = @$parstack[$#$parstack];
417: $code =~ s/\"//g;
418: $code .=';return $condition;';
419:
420: push( @Apache::structuretags::whileconds, $code);
421: my $result = &Apache::run::run($code,$safeeval);
422: my $bodytext=$$parser[$#$parser]->get_text("/while");
423: push( @Apache::structuretags::whilebody, $bodytext);
424: if ( $result ) {
425: &Apache::lonxml::newparser($parser,\$bodytext);
426: }
427: return "";
428: }
429:
430: sub end_while {
431: my ($target,$token,$tagstack,$parstack,$parser,$safeeval)=@_;
432: my $code = pop @Apache::structuretags::whileconds;
433: my $bodytext = pop @Apache::structuretags::whilebody;
434: my $result = &Apache::run::run($code,$safeeval);
435: if ( $result ) {
436: &Apache::lonxml::newparser($parser,\$bodytext);
437: }
438: return "";
439: }
440:
441: # <randomlist>
442: # <tag1>..</tag1>
443: # <tag2>..</tag2>
444: # <tag3>..</tag3>
445: # ...
446: # </randomlist>
447: sub start_randomlist {
448: my ($target,$token,$tagstack,$parstack,$parser,$safeeval)=@_;
449: my $result;
450: if ($target eq 'answer' || $target eq 'grade' || $target eq 'web') {
451: my $body= &Apache::lonxml::get_all_text("/randomlist",$$parser[$#$parser]);
452: my $b_parser= HTML::TokeParser->new(\$body);
453: my $b_tok;
454: my @randomlist;
455: my $list_item;
456: while($b_tok = $b_parser->get_token() ) {
457: if($b_tok->[0] eq 'S') { # start tag
458: # get content of the tag until matching end tag
459: # get all text upto the matching tag
460: # and push the content into @randomlist
461: $list_item = &Apache::lonxml::get_all_text('/'.$b_tok->[1],$b_parser);
462: $list_item = "$b_tok->[4]"."$list_item"."</$b_tok->[1]>";
463: push(@randomlist,$list_item);
464: # print "<br /><b>START-TAG $b_tok->[1], $b_tok->[4], $list_item</b>";
465: }
466: if($b_tok->[0] eq 'T') { # text
467: # what to do with text in between tags?
468: # print "<b>TEXT $b_tok->[1]</b><br />";
469: }
470: # if($b_tok->[0] eq 'E') { # end tag, should not happen
471: # print "<b>END-TAG $b_tok->[1]</b><br />";
472: # }
473: }
474: my @idx_arr = (0 .. $#randomlist);
475: &Apache::structuretags::shuffle(\@idx_arr);
476: my $bodytext = '';
477: my $show=$#randomlist;
478: my $showarg=&Apache::lonxml::get_param('show',$parstack,$safeeval);
479: $showarg--;
480: if ( ($showarg >= 0) && ($showarg < $show) ) { $show = $showarg; }
481: for(0 .. $show) {
482: $bodytext .= "$randomlist[ $idx_arr[$_] ]";
483: }
484: &Apache::lonxml::newparser($parser,\$bodytext);
485: } elsif ($target eq 'edit' ) {
486: $result .= &Apache::edit::tag_start($target,$token);
487: $result .= &Apache::edit::text_arg('Maximum Tags to Show:','show',$token,5);
488: $result .= &Apache::edit::end_row().&Apache::edit::start_spanning_row();
489: } elsif ($target eq 'modified' ) {
490: my $constructtag=&Apache::edit::get_new_args($token,$parstack,$safeeval,
491: 'show');
492: if ($constructtag) { $result = &Apache::edit::rebuild_tag($token); }
493: }
494: return $result;
495: }
496:
497: sub shuffle {
498: my $a=shift;
499: my $i;
500: if (defined(@$a)) {
501: &Apache::response::setrandomnumber();
502: for($i=@$a;--$i;) {
503: my $j=int rand($i+1);
504: next if $i == $j;
505: @$a[$i,$j] = @$a[$j,$i];
506: }
507: }
508: }
509:
510: sub end_randomlist {
511: my ($target,$token,$tagstack,$parstack,$parser,$safeeval)=@_;
512: my $result;
513: if ($target eq 'edit' ) {
514: $result=&Apache::edit::tag_end($target,$token,'End Randomly Parsed Block');
515: }
516: return $result;
517: }
518:
519: sub start_part {
520: my ($target,$token,$tagstack,$parstack,$parser,$safeeval)=@_;
521: my $id= &Apache::lonxml::get_param('id',$parstack,$safeeval);
522: if ($id eq '') { $id = $Apache::lonxml::curdepth; }
523: $Apache::inputtags::part=$id;
524: @Apache::inputtags::responselist = ();
525: @Apache::inputtags::previous=();
526: if ($target eq 'meta') {
527: return &Apache::response::mandatory_part_meta;
528: } elsif ($target eq 'web' || $target eq 'grade' || $target eq 'answer') {
529: my ($status,$accessmsg) = &Apache::lonhomework::check_access($id);
530: push (@Apache::inputtags::status,$status);
531: my $expression='$external::datestatus="'.$status.'";';
532: $expression.='$external::gradestatus="'.$Apache::lonhomework::history{"resource.$id.solved"}.'";';
533: &Apache::run::run($expression,$safeeval);
534: if ( $status eq 'CLOSED' ) {
535: my $bodytext=&Apache::lonxml::get_all_text("/part",$$parser[$#$parser]);
536: if ( $target eq "web" ) {
537: return "<br />Part is not open to be viewed. It $accessmsg<br />";
538: }
539: }
540: }
541: return '';
542: }
543:
544: sub end_part {
545: my ($target,$token,$tagstack,$parstack,$parser,$safeeval)=@_;
546: &Apache::lonxml::debug("in end_part $target ");
547: my $status=$Apache::inputtags::status['-1'];
548: pop @Apache::inputtags::status;
549: if ( $target eq 'meta' ) { return ''; }
550: if ( $target eq 'grade' && $status eq 'CAN_ANSWER') {
551: return &Apache::inputtags::grade;
552: }
553: if ($target eq 'web') {
554: return &Apache::inputtags::gradestatus($Apache::inputtags::part);
555: }
556: return '';
557: }
558:
559: sub start_preduedate {
560: my ($target,$token,$tagstack,$parstack,$parser,$safeeval)=@_;
561: if ($target eq 'web' || $target eq 'grade' || $target eq 'answer') {
562: if ($Apache::inputtags::status['-1'] ne 'CAN_ANSWER' &&
563: $Apache::inputtags::status['-1'] ne 'CANNOT_ANSWER' ) {
564: &Apache::lonxml::get_all_text("/preduedate",$$parser[$#$parser]);
565: }
566: }
567: return '';
568: }
569:
570: sub end_preduedate {
571: return '';
572: }
573:
574: sub start_postanswerdate {
575: my ($target,$token,$tagstack,$parstack,$parser,$safeeval)=@_;
576: if ($target eq 'web' || $target eq 'grade') {
577: if ($Apache::inputtags::status['-1'] ne 'SHOW_ANSWER') {
578: &Apache::lonxml::get_all_text("/postanswerdate",$$parser[$#$parser]);
579: }
580: }
581: return '';
582: }
583:
584: sub end_postanswerdate {
585: return '';
586: }
587:
588: sub start_notsolved {
589: my ($target,$token,$tagstack,$parstack,$parser,$safeeval)=@_;
590: if ($target eq 'web' || $target eq 'grade' || $target eq 'answer') {
591: my $gradestatus=$Apache::lonhomework::history{"resource.$Apache::inputtags::part.solved"};
592: &Apache::lonxml::debug("not solved has :$gradestatus:");
593: if ($gradestatus =~ /^correct/) {
594: &Apache::lonxml::debug("skipping");
595: &Apache::lonxml::get_all_text("/notsolved",$$parser[$#$parser]);
596: }
597: }
598: return '';
599: }
600:
601: sub end_notsolved {
602: return '';
603: }
604:
605: sub start_solved {
606: my ($target,$token,$tagstack,$parstack,$parser,$safeeval)=@_;
607: if ($target eq 'web' || $target eq 'grade' || $target eq 'answer') {
608: my $gradestatus=$Apache::lonhomework::history{"resource.$Apache::inputtags::part.solved"};
609: if ($gradestatus !~ /^correct/) {
610: &Apache::lonxml::get_all_text("/solved",$$parser[$#$parser]);
611: }
612: }
613: return '';
614: }
615:
616: sub end_solved {
617: return '';
618: }
619:
620: sub start_startouttext {
621: my ($target,$token,$tagstack,$parstack,$parser,$safeeval)=@_;
622: my @result=(''.'');
623: if ($target eq 'edit' || $target eq 'modified' ) { @result=('','no'); }
624: return (@result);
625: }
626: sub end_startouttext {
627: my ($target,$token,$tagstack,$parstack,$parser,$safeeval)=@_;
628: my $result='';
629: my $text='';
630:
631: if ($target eq 'edit') {
632: $text=&Apache::lonxml::get_all_text("endouttext",$$parser[-1]);
633: $result.=&Apache::edit::start_table($token)."<tr><td>Text Block</td>
634: <td>Delete:".
635: &Apache::edit::deletelist($target,$token)
636: ."</td>
637: <td>".
638: &Apache::edit::insertlist($target,$token).
639: &Apache::edit::end_row().&Apache::edit::start_spanning_row()."\n".
640: &Apache::edit::editfield($token->[1],$text,"",50,4);
641: }
642: if ($target eq 'modified') {
643: $text=&Apache::lonxml::get_all_text("endouttext",$$parser['-1']);
644: $result='<startouttext />'.&Apache::edit::modifiedfield();
645: }
646: if ($target eq 'tex') {
647: $result .= '\noindent ';
648: }
649: return $result;
650: }
651: sub start_endouttext {
652: my ($target,$token,$tagstack,$parstack,$parser,$safeeval)=@_;
653: my $result='';
654: if ($target eq "edit" ) { $result="</td></tr>".&Apache::edit::end_table()."\n"; }
655: if ($target eq "modified") { $result='<endouttext />'; }
656: return $result;
657: }
658: sub end_endouttext {
659: my ($target,$token,$tagstack,$parstack,$parser,$safeeval)=@_;
660: my @result=('','');
661: if ($target eq "edit" || $target eq 'modified') { @result=('','no'); }
662: return (@result);
663: }
664: sub delete_startouttext {
665: my ($target,$token,$tagstack,$parstack,$parser,$safeeval)=@_;
666: # my $text=&Apache::lonxml::get_all_text("endouttext",$$parser['-1']);
667: my $text=$$parser['-1']->get_text("/endouttext");
668: my $ntoken=$$parser['-1']->get_token();
669: &Apache::lonxml::debug("Deleting :$text: and :$ntoken->[0]:$ntoken->[1]:$ntoken->[2]: for startouttext");
670: &Apache::lonxml::end_tag($tagstack,$parstack,$ntoken);
671: # Deleting 2 parallel tag pairs, but we need the numbers later to look like
672: # they did the last time round
673: &Apache::lonxml::increasedepth($ntoken);
674: &Apache::lonxml::decreasedepth($ntoken);
675: return 1;
676: }
677:
678: 1;
679: __END__
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