1: # The LearningOnline Network with CAPA
2: # definition of tags that give a structure to a document
3: #
4: # $Id: structuretags.pm,v 1.91 2002/04/25 18:58:04 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 $result;
143: }
144:
145: sub checkout_msg {
146: return (<<ENDCHECKOUT);
147: <h2>The resource needs to be checked out</h2>
148: As a resource gets checked out, a unique timestamped ID is given to it, and a
149: permanent record is left in the system.<p />
150: <font color=red>
151: Checking out resources is subject to course policies, and may exclude future
152: credit even if done erroneously.<p />
153: </font>
154: <form name="checkout" method="POST" action="$ENV{'request.uri'}">
155: <input type="hidden" name="doescheckout" value="yes" />
156: <input type="button" name="checkoutbutton" value="Check out Exam for Viewing" onClick="javascript:if (confirm('Check out Exam?')) { document.checkout.submit(); }" />
157: </form>
158: ENDCHECKOUT
159: }
160:
161: sub start_problem {
162: my ($target,$token,$tagstack,$parstack,$parser,$safeeval)=@_;
163:
164: # meta is called from lonpublisher, which doesn't uses the normal
165: # lonhomework method of parsing the file which means that inputtags
166: # won't get reset
167: if ( $Apache::inputtags::part ne '' && $target != 'meta' ) {
168: &Apache::lonxml::error('Only one problem allowed in a .problem file');
169: my $bodytext=&Apache::lonxml::get_all_text("/problem",$$parser[-1]);
170: return '';
171: }
172: #intialize globals
173: $Apache::inputtags::part='0';
174: @Apache::inputtags::responselist = ();
175: @Apache::inputtags::previous=();
176: if ($target ne 'analyze') {
177: &initialize_storage();
178: if ($target eq 'web') {
179: &Apache::lonhomework::showhash(%Apache::lonhomework::history);
180: }
181: $Apache::lonhomework::type=&Apache::lonnet::EXT('resource.0.type');
182: &Apache::lonxml::debug("Found this to be of type :$Apache::lonhomework::type:");
183: }
184: if ($Apache::lonhomework::type eq '') {
185: my $uri=$ENV{'request.uri'};
186: if ($uri=~/\.(\w+)$/) {
187: $Apache::lonhomework::type=$1;
188: &Apache::lonxml::debug("Using type of $1");
189: } else {
190: $Apache::lonhomework::type='problem';
191: &Apache::lonxml::debug("Using default type, problem, :$uri:");
192: }
193: }
194:
195: #added vars to the scripting enviroment
196: my $expression='$external::part='.$Apache::inputtags::part.';';
197: &Apache::run::run($expression,$safeeval);
198: my $status;
199: my $accessmsg;
200:
201: #should get back a <html> or the neccesary stuff to start XML/MathML
202: my ($result,$head_tag_start,$body_tag_start)=
203: &page_start($target,$token,$tagstack,$parstack,$parser,$safeeval);
204:
205:
206: if ($target eq 'web' || $target eq 'grade' || $target eq 'answer') {
207: #handle exam checkout
208: if ($Apache::lonhomework::type eq 'exam') {
209: my $token=$Apache::lonhomework::history{"resource.0.outtoken"};
210: if (($ENV{'form.doescheckout'}) && (!$token)) {
211: $token=&Apache::lonxml::maketoken();
212: $Apache::lonhomework::history{"resource.0.outtoken"}=$token;
213: }
214: $body_tag_start.=&Apache::lonxml::printtokenheader($target,$token);
215: }
216:
217: #handle rand seed in construction space
218: my $rndseed;
219: if ($ENV{'request.state'} eq "construct") {
220: $rndseed=$ENV{'form.rndseed'};
221: if (!$rndseed) {
222: $rndseed=time;
223: $ENV{'form.rndseed'}=$rndseed;
224: }
225: &Apache::run::run('$external::randomseed='.$rndseed.';',$safeeval);
226: }
227: ($status,$accessmsg) = &Apache::lonhomework::check_access('0');
228: push (@Apache::inputtags::status,$status);
229: my $expression='$external::datestatus="'.$status.'";';
230: $expression.='$external::gradestatus="'.$Apache::lonhomework::history{"resource.0.solved"}.'";';
231: &Apache::run::run($expression,$safeeval);
232: if (( $status eq 'CLOSED' ) ||
233: ( $status eq 'UNCHECKEDOUT') ||
234: ( $status eq 'BANNED')) {
235: my $bodytext=&Apache::lonxml::get_all_text("/problem",$$parser[$#$parser]);
236: if ( $target eq "web" ) {
237: $result.= $head_tag_start.'</head>';
238: my $msg=$body_tag_start.
239: '<h1>Not open to be viewed</h1>';
240: if ($status eq 'CLOSED') {
241: $msg.='The problem '.$accessmsg;
242: } elsif ($status eq 'UNCHECKEDOUT') {
243: $msg.=&checkout_msg;
244: }
245: $result.=$msg.'<br />';
246: }
247: } elsif ($target eq 'web') {
248: my $name= &Apache::lonxml::get_param('name',$parstack,$safeeval);
249: if ($name eq '') {
250: $name=&Apache::lonnet::EXT('resource.title');
251: if ($name eq 'con_lost') { $name = ''; }
252: }
253: $Apache::lonhomework::name=$name;
254: if ($status eq 'CAN_ANSWER') {
255: # create a page header and exit
256: $result.="$head_tag_start<title>$name</title></head>\n
257: $body_tag_start\n
258: <form name=\"lonhomework\" method=\"POST\" action=\"".$ENV{'request.uri'}."\">".
259: '<input type="hidden" name="submitted" value="yes" />';
260: if ($ENV{'request.state'} eq "construct") {
261: $result.=
262: '<input type="hidden" name="problemmode" value="View" />
263: <input type="submit" name="problemmode" value="Edit" />
264: <input type="submit" name="problemmode" value="EditXML" />
265: Random Seed:<input type="text" name="rndseed" width="10" value="'.
266: $rndseed.'" />
267: <input type="submit" name="changerandseed" value="Change" />
268: <input type="submit" name="resetdata" value="Reset Submissions" />
269: <hr />';
270: }
271: # if we are viewing someone else preserve that info
272: if (defined $ENV{'form.grade_symb'}) {
273: foreach my $field ('symb','courseid','domain','username') {
274: $result .= '<input type="hidden" name="grade_'.$field.
275: '" value="'.$ENV{"form.grade_$field"}.'" />'."\n";
276: }
277: }
278: } elsif ($status eq 'SHOW_ANSWER' || $status eq 'CANNOT_ANSWER'
279: || $status eq 'CLOSED') {
280: $result.=$head_tag_start.
281: "<title>$name</title></head>\n$body_tag_start\n";
282: }
283: }
284: } elsif ($target eq 'edit') {
285: $result.=$head_tag_start."</head>".$body_tag_start.
286: '<form name="lonhomework" method="POST" action="'.
287: $ENV{'request.uri'}.'">
288: <input type="hidden" name="submitted" value="edit" />
289: <input type="hidden" name="problemmode" value="Edit" />
290: <input type="submit" name="problemmode" value="View" />
291: <input type="submit" name="problemmode" value="EditXML" />
292: <input type="submit" name="Undo" value="undo" /> <hr />
293: <input type="submit" name="submit" value="Submit Changes" /><br />
294: ';
295: my $temp=&Apache::edit::insertlist($target,$token);
296: $result.=$temp;
297: } elsif ($target eq 'modified') {
298: $result=$token->[4];
299: $result.=&Apache::edit::handle_insert();
300: } elsif ($target eq 'tex') {
301: $result .= '\begin{document} ';
302: } else {
303: # page_start returned a starting result, delete it if we don't need it
304: $result = '';
305: }
306: return $result;
307: }
308:
309: sub end_problem {
310: my ($target,$token,$tagstack,$parstack,$parser,$safeeval)=@_;
311: my $result='';
312: my $status=$Apache::inputtags::status['-1'];
313: if ($target eq 'grade' || $target eq 'web' || $target eq 'answer' ) {
314: if ( $target eq 'grade' && $Apache::inputtags::part eq '0') {
315: # if part is zero, no <part>s existed, so we need to the grading
316: &Apache::inputtags::grade;
317: } elsif ( $target eq 'web' && $Apache::inputtags::part eq '0' &&
318: $status ne 'UNCHECKEDOUT') {
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: $status eq 'UNCHECKEDOUT' ) {
331: $result.="</body>\n";
332: }
333: $result.=&Apache::lonxml::xmlend();
334: }
335: if ($target eq 'grade') {
336: &Apache::lonhomework::showhash(%Apache::lonhomework::results);
337: &finalize_storage();
338: }
339: } elsif ($target eq 'meta') {
340: if ($Apache::inputtags::part eq '0') {
341: $result=&Apache::response::mandatory_part_meta;
342: }
343: } elsif ($target eq 'edit') {
344: &Apache::lonxml::debug("in end_problem with $target, edit");
345: $result='<br /><input type="submit" name="submit" value="Submit Changes" />';
346: } elsif ($target eq 'tex') {
347: $result .= '\vskip 0.5mm\noindent\makebox[9.0cm][b]{\hrulefill}\end{document}';
348: }
349: return $result;
350: }
351:
352: sub start_library {
353: my ($target,$token,$tagstack,$parstack,$parser,$safeeval)=@_;
354: my ($result,$head_tag_start,$body_tag_start)=
355: &page_start($target,$token,$tagstack,$parstack,$parser,$safeeval);
356: if ($target eq 'edit') {
357: $result.=$head_tag_start."</head>".$body_tag_start.
358: '<form name="lonhomework" method="POST" action="'.$ENV{'request.uri'}.'">
359: <input type="hidden" name="submitted" value="edit" />
360: <input type="hidden" name="problemmode" value="Edit" />
361: <input type="submit" name="problemmode" value="View" />
362: <input type="submit" name="Undo" value="undo" /> <hr />
363: ';
364: my $temp=&Apache::edit::insertlist($target,$token);
365: $result.=$temp;
366: return $result;
367: }
368: if ($target eq 'modified') {
369: $result=$token->[4];
370: $result.=&Apache::edit::handle_insert();
371: return $result;
372: }
373: return '';
374: }
375:
376: sub end_library {
377: my ($target,$token,$tagstack,$parstack,$parser,$safeeval)=@_;
378: my $result='';
379: if ($target eq 'edit') {
380: $result='<br /><input type="submit" name="submit" value="Submit Changes" />';
381: }
382: return $result;
383: }
384:
385: sub start_block {
386: my ($target,$token,$tagstack,$parstack,$parser,$safeeval)=@_;
387:
388: if ($target eq 'web' || $target eq 'grade' || $target eq 'answer') {
389: my $code = @$parstack[$#$parstack];
390: $code =~ s/\"//g;
391: $code .=';return $condition;';
392: # print "<br />$code<br />";
393: my $result = &Apache::run::run($code,$safeeval);
394: &Apache::lonxml::debug("block :$code: returned :$result:");
395: if ( ! $result ) {
396: my $skip=&Apache::lonxml::get_all_text("/block",$$parser[$#$parser]);
397: &Apache::lonxml::debug("skipping ahead :$skip: $$parser[$#$parser]");
398: }
399: }
400: return "";
401: }
402:
403: sub end_block {
404: return '';
405: }
406:
407: sub start_while {
408: my ($target,$token,$tagstack,$parstack,$parser,$safeeval)=@_;
409:
410: my $code = @$parstack[$#$parstack];
411: $code =~ s/\"//g;
412: $code .=';return $condition;';
413:
414: push( @Apache::structuretags::whileconds, $code);
415: my $result = &Apache::run::run($code,$safeeval);
416: my $bodytext=$$parser[$#$parser]->get_text("/while");
417: push( @Apache::structuretags::whilebody, $bodytext);
418: if ( $result ) {
419: &Apache::lonxml::newparser($parser,\$bodytext);
420: }
421: return "";
422: }
423:
424: sub end_while {
425: my ($target,$token,$tagstack,$parstack,$parser,$safeeval)=@_;
426: my $code = pop @Apache::structuretags::whileconds;
427: my $bodytext = pop @Apache::structuretags::whilebody;
428: my $result = &Apache::run::run($code,$safeeval);
429: if ( $result ) {
430: &Apache::lonxml::newparser($parser,\$bodytext);
431: }
432: return "";
433: }
434:
435: # <randomlist>
436: # <tag1>..</tag1>
437: # <tag2>..</tag2>
438: # <tag3>..</tag3>
439: # ...
440: # </randomlist>
441: sub start_randomlist {
442: my ($target,$token,$tagstack,$parstack,$parser,$safeeval)=@_;
443: my $result;
444: if ($target eq 'answer' || $target eq 'grade' || $target eq 'web') {
445: my $body= &Apache::lonxml::get_all_text("/randomlist",$$parser[$#$parser]);
446: my $b_parser= HTML::TokeParser->new(\$body);
447: my $b_tok;
448: my @randomlist;
449: my $list_item;
450: while($b_tok = $b_parser->get_token() ) {
451: if($b_tok->[0] eq 'S') { # start tag
452: # get content of the tag until matching end tag
453: # get all text upto the matching tag
454: # and push the content into @randomlist
455: $list_item = &Apache::lonxml::get_all_text('/'.$b_tok->[1],$b_parser);
456: $list_item = "$b_tok->[4]"."$list_item"."</$b_tok->[1]>";
457: push(@randomlist,$list_item);
458: # print "<br /><b>START-TAG $b_tok->[1], $b_tok->[4], $list_item</b>";
459: }
460: if($b_tok->[0] eq 'T') { # text
461: # what to do with text in between tags?
462: # print "<b>TEXT $b_tok->[1]</b><br />";
463: }
464: # if($b_tok->[0] eq 'E') { # end tag, should not happen
465: # print "<b>END-TAG $b_tok->[1]</b><br />";
466: # }
467: }
468: my @idx_arr = (0 .. $#randomlist);
469: &Apache::structuretags::shuffle(\@idx_arr);
470: my $bodytext = '';
471: my $show=$#randomlist;
472: my $showarg=&Apache::lonxml::get_param('show',$parstack,$safeeval);
473: $showarg--;
474: if ( ($showarg >= 0) && ($showarg < $show) ) { $show = $showarg; }
475: for(0 .. $show) {
476: $bodytext .= "$randomlist[ $idx_arr[$_] ]";
477: }
478: &Apache::lonxml::newparser($parser,\$bodytext);
479: } elsif ($target eq 'edit' ) {
480: $result .= &Apache::edit::tag_start($target,$token);
481: $result .= &Apache::edit::text_arg('Maximum Tags to Show:','show',$token,5);
482: $result .= &Apache::edit::end_row().&Apache::edit::start_spanning_row();
483: } elsif ($target eq 'modified' ) {
484: my $constructtag=&Apache::edit::get_new_args($token,$parstack,$safeeval,
485: 'show');
486: if ($constructtag) { $result = &Apache::edit::rebuild_tag($token); }
487: }
488: return $result;
489: }
490:
491: sub shuffle {
492: my $a=shift;
493: my $i;
494: if (defined(@$a)) {
495: &Apache::response::setrandomnumber();
496: for($i=@$a;--$i;) {
497: my $j=int rand($i+1);
498: next if $i == $j;
499: @$a[$i,$j] = @$a[$j,$i];
500: }
501: }
502: }
503:
504: sub end_randomlist {
505: my ($target,$token,$tagstack,$parstack,$parser,$safeeval)=@_;
506: my $result;
507: if ($target eq 'edit' ) {
508: $result=&Apache::edit::tag_end($target,$token,'End Randomly Parsed Block');
509: }
510: return $result;
511: }
512:
513: sub start_part {
514: my ($target,$token,$tagstack,$parstack,$parser,$safeeval)=@_;
515: my $id= &Apache::lonxml::get_param('id',$parstack,$safeeval);
516: if ($id eq '') { $id = $Apache::lonxml::curdepth; }
517: $Apache::inputtags::part=$id;
518: @Apache::inputtags::responselist = ();
519: @Apache::inputtags::previous=();
520: if ($target eq 'meta') {
521: return &Apache::response::mandatory_part_meta;
522: } elsif ($target eq 'web' || $target eq 'grade' || $target eq 'answer') {
523: my ($status,$accessmsg) = &Apache::lonhomework::check_access($id);
524: push (@Apache::inputtags::status,$status);
525: my $expression='$external::datestatus="'.$status.'";';
526: $expression.='$external::gradestatus="'.$Apache::lonhomework::history{"resource.$id.solved"}.'";';
527: &Apache::run::run($expression,$safeeval);
528: if ( $status eq 'CLOSED' ) {
529: my $bodytext=&Apache::lonxml::get_all_text("/part",$$parser[$#$parser]);
530: if ( $target eq "web" ) {
531: return "<br />Part is not open to be viewed. It $accessmsg<br />";
532: }
533: }
534: }
535: return '';
536: }
537:
538: sub end_part {
539: my ($target,$token,$tagstack,$parstack,$parser,$safeeval)=@_;
540: &Apache::lonxml::debug("in end_part $target ");
541: my $status=$Apache::inputtags::status['-1'];
542: pop @Apache::inputtags::status;
543: if ( $target eq 'meta' ) { return ''; }
544: if ( $target eq 'grade' && $status eq 'CAN_ANSWER') {
545: return &Apache::inputtags::grade;
546: }
547: if ($target eq 'web') {
548: return &Apache::inputtags::gradestatus($Apache::inputtags::part);
549: }
550: return '';
551: }
552:
553: sub start_preduedate {
554: my ($target,$token,$tagstack,$parstack,$parser,$safeeval)=@_;
555: if ($target eq 'web' || $target eq 'grade' || $target eq 'answer') {
556: if ($Apache::inputtags::status['-1'] ne 'CAN_ANSWER' &&
557: $Apache::inputtags::status['-1'] ne 'CANNOT_ANSWER' ) {
558: &Apache::lonxml::get_all_text("/preduedate",$$parser[$#$parser]);
559: }
560: }
561: return '';
562: }
563:
564: sub end_preduedate {
565: return '';
566: }
567:
568: sub start_postanswerdate {
569: my ($target,$token,$tagstack,$parstack,$parser,$safeeval)=@_;
570: if ($target eq 'web' || $target eq 'grade') {
571: if ($Apache::inputtags::status['-1'] ne 'SHOW_ANSWER') {
572: &Apache::lonxml::get_all_text("/postanswerdate",$$parser[$#$parser]);
573: }
574: }
575: return '';
576: }
577:
578: sub end_postanswerdate {
579: return '';
580: }
581:
582: sub start_notsolved {
583: my ($target,$token,$tagstack,$parstack,$parser,$safeeval)=@_;
584: if ($target eq 'web' || $target eq 'grade' || $target eq 'answer') {
585: my $gradestatus=$Apache::lonhomework::history{"resource.$Apache::inputtags::part.solved"};
586: &Apache::lonxml::debug("not solved has :$gradestatus:");
587: if ($gradestatus =~ /^correct/) {
588: &Apache::lonxml::debug("skipping");
589: &Apache::lonxml::get_all_text("/notsolved",$$parser[$#$parser]);
590: }
591: }
592: return '';
593: }
594:
595: sub end_notsolved {
596: return '';
597: }
598:
599: sub start_solved {
600: my ($target,$token,$tagstack,$parstack,$parser,$safeeval)=@_;
601: if ($target eq 'web' || $target eq 'grade' || $target eq 'answer') {
602: my $gradestatus=$Apache::lonhomework::history{"resource.$Apache::inputtags::part.solved"};
603: if ($gradestatus !~ /^correct/) {
604: &Apache::lonxml::get_all_text("/solved",$$parser[$#$parser]);
605: }
606: }
607: return '';
608: }
609:
610: sub end_solved {
611: return '';
612: }
613:
614: sub start_startouttext {
615: my ($target,$token,$tagstack,$parstack,$parser,$safeeval)=@_;
616: my @result=(''.'');
617: if ($target eq 'edit' || $target eq 'modified' ) { @result=('','no'); }
618: return (@result);
619: }
620: sub end_startouttext {
621: my ($target,$token,$tagstack,$parstack,$parser,$safeeval)=@_;
622: my $result='';
623: my $text='';
624:
625: if ($target eq 'edit') {
626: $text=&Apache::lonxml::get_all_text("endouttext",$$parser[-1]);
627: $result.=&Apache::edit::start_table($token)."<tr><td>Text Block</td>
628: <td>Delete:".
629: &Apache::edit::deletelist($target,$token)
630: ."</td>
631: <td>".
632: &Apache::edit::insertlist($target,$token).
633: &Apache::edit::end_row().&Apache::edit::start_spanning_row()."\n".
634: &Apache::edit::editfield($token->[1],$text,"",50,4);
635: }
636: if ($target eq 'modified') {
637: $text=&Apache::lonxml::get_all_text("endouttext",$$parser['-1']);
638: $result='<startouttext />'.&Apache::edit::modifiedfield();
639: }
640: if ($target eq 'tex') {
641: $result .= '\noindent ';
642: }
643: return $result;
644: }
645: sub start_endouttext {
646: my ($target,$token,$tagstack,$parstack,$parser,$safeeval)=@_;
647: my $result='';
648: if ($target eq "edit" ) { $result="</td></tr>".&Apache::edit::end_table()."\n"; }
649: if ($target eq "modified") { $result='<endouttext />'; }
650: return $result;
651: }
652: sub end_endouttext {
653: my ($target,$token,$tagstack,$parstack,$parser,$safeeval)=@_;
654: my @result=('','');
655: if ($target eq "edit" || $target eq 'modified') { @result=('','no'); }
656: return (@result);
657: }
658: sub delete_startouttext {
659: my ($target,$token,$tagstack,$parstack,$parser,$safeeval)=@_;
660: # my $text=&Apache::lonxml::get_all_text("endouttext",$$parser['-1']);
661: my $text=$$parser['-1']->get_text("/endouttext");
662: my $ntoken=$$parser['-1']->get_token();
663: &Apache::lonxml::debug("Deleting :$text: and :$ntoken->[0]:$ntoken->[1]:$ntoken->[2]: for startouttext");
664: &Apache::lonxml::end_tag($tagstack,$parstack,$ntoken);
665: # Deleting 2 parallel tag pairs, but we need the numbers later to look like
666: # they did the last time round
667: &Apache::lonxml::increasedepth($ntoken);
668: &Apache::lonxml::decreasedepth($ntoken);
669: return 1;
670: }
671:
672: 1;
673: __END__
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