1: # The LearningOnline Network with CAPA
2: # definition of tags that give a structure to a document
3: # 2/19 Guy
4: # 6/26/2001 fixed extra web display at end of <web></web> tags
5: # 8/17,8/18,8/20 Gerd Kortemeyer
6:
7: package Apache::structuretags;
8:
9: use strict;
10: use Apache::lonnet;
11:
12: sub BEGIN {
13: &Apache::lonxml::register('Apache::structuretags',('block','while','randomlist','problem','library','web','tex','part','preduedate','postanswerdate','solved','notsolved','startouttext','endouttext'));
14: # &Apache::lonxml::register_insert('problem','',('part','postanswerdate','preduedate'))
15: }
16:
17: sub start_web {
18: my ($target,$token,$tagstack,$parstack,$parser,$safeeval)=@_;
19: my $bodytext=&Apache::lonxml::get_all_text("/web",$$parser[$#$parser]);
20: if ($target eq 'web') {
21: return $bodytext;
22: }
23: return '';
24: }
25:
26: sub end_web {
27: return '';
28: }
29:
30: sub start_tex {
31: my ($target,$token,$tagstack,$parstack,$parser,$safeeval)=@_;
32: my $bodytext=&Apache::lonxml::get_all_text("/tex",$$parser[$#$parser]);
33: if ($target eq 'tex') {
34: return $bodytext
35: }
36: return '';
37: }
38:
39: sub end_tex {
40: return '';
41: }
42:
43: sub page_start {
44: my ($target,$token,$tagstack,$parstack,$parser,$safeeval)=@_;
45: my $result=&Apache::londefdef::start_html($target,$token,$tagstack,$parstack,$parser,$safeeval);
46: my $head_tag_start='<head>'.&Apache::lonxml::registerurl();
47: my $body_tag_start='<body onLoad="'.&Apache::lonxml::loadevents().'" '.
48: 'onUnload="'.&Apache::lonxml::unloadevents().'" ';
49: my $background=&Apache::lonxml::get_param('background',$parstack,$safeeval);
50: if ($background) {
51: $Apache::lonxml::extlinks[$#Apache::lonxml::extlinks+1]=
52: $background;
53: $body_tag_start.='background="'.$background.'" ';
54: } else {
55: my $bgcolor=&Apache::lonxml::get_param('bgcolor',$parstack,$safeeval);
56: if ($bgcolor) {
57: $body_tag_start.='bgcolor="'.$bgcolor.'" ';
58: } else {
59: $body_tag_start.='bgcolor="#ffffff"';
60: }
61: }
62: $body_tag_start.='>';
63: return ($result,$head_tag_start,$body_tag_start);
64: }
65:
66: sub initialize_storage {
67: %Apache::lonhomework::results=();
68: my ($symb,$courseid,$domain,$name) = &Apache::lonxml::whichuser();
69: if ($ENV{'request.state'} eq 'construct') {
70: %Apache::lonhomework::history=
71: &Apache::lonnet::tmprestore($ENV{'request.uri'},'',$domain,$name);
72: my ($temp)=keys %Apache::lonhomework::history ;
73: &Apache::lonxml::debug("Return message of $temp");
74: } else {
75: %Apache::lonhomework::history=
76: &Apache::lonnet::restore($symb,$courseid,$domain,$name);
77: }
78: #ignore error conditions
79: my ($temp)=keys %Apache::lonhomework::history ;
80: if ($temp =~ m/^error:.*/) { %Apache::lonhomework::history=(); }
81: }
82:
83: # -------------------------------------------------------------finalize_storage
84: # Stores away the result has to a student's environment
85: # checks form.grade_ for specific values, other wises stores
86: # to the running users environment
87: sub finalize_storage {
88: my $result;
89: my ($temp) = keys %Apache::lonhomework::results;
90: if ( $temp ne '' ) {
91: my ($symb,$courseid,$domain,$name) = &Apache::lonxml::whichuser();
92: if ($ENV{'request.state'} eq 'construct') {
93: $result=&Apache::lonnet::tmpstore(\%Apache::lonhomework::results,
94: $ENV{'request.uri'},'',$domain,$name);
95: &Apache::lonxml::debug('Construct Store return message:'.$result);
96: } else {
97: $result=&Apache::lonnet::cstore(\%Apache::lonhomework::results,
98: $symb,$courseid,$domain,$name);
99: &Apache::lonxml::debug('Store return message:'.$result);
100: }
101: }
102: return $result;
103: }
104:
105: sub checkout_msg {
106: return (<<ENDCHECKOUT);
107: <h2>The resource needs to be checked out</h2>
108: As a resource gets checked out, a unique timestamped ID is given to it, and a
109: permanent record is left in the system.<p />
110: <font color=red>
111: Checking out resources is subject to course policies, and may exclude future
112: credit even if done erroneously.<p />
113: </font>
114: <form method=post>
115: <input type=button name="doescheckout"
116: value="Check out Exam for Viewing"
117: onClick="if (confirm('Check out Exam?')) { this.form.submit(); }" />
118: </form>
119: ENDCHECKOUT
120: }
121:
122: sub start_problem {
123: my ($target,$token,$tagstack,$parstack,$parser,$safeeval)=@_;
124:
125: #intialize globals
126: $Apache::inputtags::part='0';
127: @Apache::inputtags::responselist = ();
128: @Apache::inputtags::previous=();
129: &initialize_storage();
130: if ($target eq 'web') {
131: &Apache::lonhomework::showhash(%Apache::lonhomework::history);
132: }
133: $Apache::lonhomework::type=&Apache::lonnet::EXT('resource.0.type');
134: &Apache::lonxml::debug("Found this to be of type :$Apache::lonhomework::type:");
135: if ($Apache::lonhomework::type eq '') {
136: my $uri=$ENV{'request.uri'};
137: if ($uri=~/\.(\w+)$/) {
138: $Apache::lonhomework::type=$1;
139: &Apache::lonxml::debug("Using type of $1");
140: } else {
141: $Apache::lonhomework::type='problem';
142: &Apache::lonxml::debug("Using default type, problem, :$uri:");
143: }
144: }
145:
146: #added vars to the scripting enviroment
147: my $expression='$external::part='.$Apache::inputtags::part.';';
148: &Apache::run::run($expression,$safeeval);
149: my $status;
150: my $accessmsg;
151:
152: #should get back a <html> or the neccesary stuff to start XML/MathML
153: my ($result,$head_tag_start,$body_tag_start)=
154: &page_start($target,$token,$tagstack,$parstack,$parser,$safeeval);
155:
156:
157: if ($target eq 'web' || $target eq 'grade' || $target eq 'answer') {
158: #handle exam checkout
159: if ($Apache::lonhomework::type eq 'exam') {
160: my $token=$Apache::lonhomework::history{"resource.0.outtoken"};
161: if (($ENV{'form.doescheckout'}) && (!$token)) {
162: $token=&Apache::lonxml::maketoken();
163: $Apache::lonhomework::history{"resource.0.outtoken"}=$token;
164: }
165: $body_tag_start.=&Apache::lonxml::printtokenheader($target,$token);
166: }
167:
168: #handle rand seed in construction space
169: my $rndseed;
170: if ($ENV{'request.state'} eq "construct") {
171: $rndseed=$ENV{'form.rndseed'};
172: if (!$rndseed) {
173: $rndseed=time;
174: $ENV{'form.rndseed'}=$rndseed;
175: }
176: &Apache::run::run('$external::randomseed='.$rndseed.';',$safeeval);
177: }
178: ($status,$accessmsg) = &Apache::lonhomework::check_access('0');
179: push (@Apache::inputtags::status,$status);
180: my $expression='$external::datestatus="'.$status.'";';
181: $expression.='$external::gradestatus="'.$Apache::lonhomework::history{"resource.0.solved"}.'";';
182: &Apache::run::run($expression,$safeeval);
183: if (( $status eq 'CLOSED' ) ||
184: ( $status eq 'UNCHECKEDOUT') ||
185: ( $status eq 'BANNED')) {
186: my $bodytext=&Apache::lonxml::get_all_text("/problem",$$parser[$#$parser]);
187: if ( $target eq "web" ) {
188: $result.= $head_tag_start.'</head>';
189: my $msg=$body_tag_start.
190: '<h1>Not open to be viewed</h1>';
191: if ($status eq 'CLOSED') {
192: $msg.='The problem '.$accessmsg;
193: } elsif ($status eq 'UNCHECKEDOUT') {
194: $msg.=&checkout_msg;
195: }
196: $result.=$msg.'<br />';
197: }
198: } elsif ($target eq 'web') {
199: my $name= &Apache::lonxml::get_param('name',$parstack,$safeeval);
200: if ($name eq '') {
201: $name=&Apache::lonnet::EXT('resource.title');
202: if ($name eq 'con_lost') { $name = ''; }
203: }
204: $Apache::lonhomework::name=$name;
205: if ($status eq 'CAN_ANSWER') {
206: # create a page header and exit
207: $result.="$head_tag_start<title>$name</title></head>\n
208: $body_tag_start\n
209: <form name=\"lonhomework\" method=\"POST\" action=\"".$ENV{'request.uri'}."\">".
210: '<input type="hidden" name="submitted" value="yes" />';
211: if ($ENV{'request.state'} eq "construct") {
212: $result.=
213: '<input type="hidden" name="problemmode" value="View" />
214: <input type="submit" name="problemmode" value="Edit" />
215: <input type="submit" name="problemmode" value="EditXML" />
216: Random Seed:<input type="text" name="rndseed" width="10" value="'.
217: $rndseed.'" />
218: <input type="submit" name="changerandseed" value="Change" />
219: <input type="submit" name="resetdata" value="Reset Submissions" />
220: <hr />';
221: }
222: # if we are viewing someone else preserve that info
223: if (defined $ENV{'form.grade_symb'}) {
224: foreach my $field ('symb','courseid','domain','username') {
225: $result .= '<input type="hidden" name="grade_'.$field.
226: '" value="'.$ENV{"form.grade_$field"}.'" />'."\n";
227: }
228: }
229: } elsif ($status eq 'SHOW_ANSWER' || $status eq 'CANNOT_ANSWER'
230: || $status eq 'CLOSED') {
231: $result.=$head_tag_start.
232: "<title>$name</title></head>\n$body_tag_start\n";
233: }
234: }
235: } elsif ($target eq 'edit') {
236: $result.=$head_tag_start."</head>".$body_tag_start.
237: '<form name="lonhomework" method="POST" action="'.
238: $ENV{'request.uri'}.'">
239: <input type="hidden" name="submitted" value="edit" />
240: <input type="hidden" name="problemmode" value="Edit" />
241: <input type="submit" name="problemmode" value="View" />
242: <input type="submit" name="problemmode" value="EditXML" />
243: <input type="submit" name="Undo" value="undo" /> <hr />
244: <input type="submit" name="submit" value="Submit Changes" /><br />
245: ';
246: my $temp=&Apache::edit::insertlist($target,$token);
247: $result.=$temp;
248: } elsif ($target eq 'modified') {
249: $result=$token->[4];
250: $result.=&Apache::edit::handle_insert();
251: } else {
252: # page_start returned a starting result, delete it if we don't need it
253: $result = '';
254: }
255: return $result;
256: }
257:
258: sub end_problem {
259: my ($target,$token,$tagstack,$parstack,$parser,$safeeval)=@_;
260: my $result='';
261: my $status=$Apache::inputtags::status['-1'];
262: if ($target eq 'grade' || $target eq 'web' || $target eq 'answer' ) {
263: if ( $target eq 'grade' && $Apache::inputtags::part eq '0' &&
264: $status eq 'CAN_ANSWER') {
265: # if part is zero, no <part>s existed, so we need to the grading
266: &Apache::inputtags::grade;
267: } elsif ( $target eq 'web' && $Apache::inputtags::part eq '0') {
268: # if part is zero, no <part>s existed, so we need show the current
269: # grading status
270: $result.= &Apache::inputtags::gradestatus($Apache::inputtags::part);
271: }
272: if (
273: ($target eq 'web' && ($ENV{'request.state'} ne 'construct')) ||
274: ($target eq 'answer')
275: ) {
276: if ($status eq 'CAN_ANSWER') {
277: $result.="</form></body>\n";
278: } elsif ($status eq 'SHOW_ANSWER' || $status eq 'CANNOT_ANSWER') {
279: $result.="</body>\n";
280: }
281: $result.=&Apache::lonxml::xmlend();
282: }
283: if ($target eq 'grade') {
284: &Apache::lonhomework::showhash(%Apache::lonhomework::results);
285: &finalize_storage();
286: }
287: } elsif ($target eq 'meta') {
288: if ($Apache::inputtags::part eq '0') {
289: $result=&Apache::response::mandatory_part_meta;
290: }
291: } elsif ($target eq 'edit') {
292: &Apache::lonxml::debug("in end_problem with $target, edit");
293: $result='<br /><input type="submit" name="submit" value="Submit Changes" />';
294: }
295: return $result;
296: }
297:
298: sub start_library {
299: my ($target,$token,$tagstack,$parstack,$parser,$safeeval)=@_;
300: my ($result,$head_tag_start,$body_tag_start)=
301: &page_start($target,$token,$tagstack,$parstack,$parser,$safeeval);
302: if ($target eq 'edit') {
303: $result.=$head_tag_start."</head>".$body_tag_start.
304: '<form name="lonhomework" method="POST" action="'.$ENV{'request.uri'}.'">
305: <input type="hidden" name="submitted" value="edit" />
306: <input type="hidden" name="problemmode" value="Edit" />
307: <input type="submit" name="problemmode" value="View" />
308: <input type="submit" name="Undo" value="undo" /> <hr />
309: ';
310: my $temp=&Apache::edit::insertlist($target,$token);
311: $result.=$temp;
312: return $result;
313: }
314: if ($target eq 'modified') {
315: $result=$token->[4];
316: $result.=&Apache::edit::handle_insert();
317: return $result;
318: }
319: return '';
320: }
321:
322: sub end_library {
323: my ($target,$token,$tagstack,$parstack,$parser,$safeeval)=@_;
324: my $result='';
325: if ($target eq 'edit') {
326: $result='<br /><input type="submit" name="submit" value="Submit Changes" />';
327: }
328: return $result;
329: }
330:
331: sub start_block {
332: my ($target,$token,$tagstack,$parstack,$parser,$safeeval)=@_;
333:
334: if ($target eq 'web' || $target eq 'grade' || $target eq 'answer') {
335: my $code = @$parstack[$#$parstack];
336: $code =~ s/\"//g;
337: $code .=';return $condition;';
338: # print "<br />$code<br />";
339: my $result = &Apache::run::run($code,$safeeval);
340: &Apache::lonxml::debug("block :$code: returned :$result:");
341: if ( ! $result ) {
342: my $skip=&Apache::lonxml::get_all_text("/block",$$parser[$#$parser]);
343: &Apache::lonxml::debug("skipping ahead :$skip: $$parser[$#$parser]");
344: }
345: }
346: return "";
347: }
348:
349: sub end_block {
350: return '';
351: }
352:
353: sub start_while {
354: my ($target,$token,$tagstack,$parstack,$parser,$safeeval)=@_;
355:
356: my $code = @$parstack[$#$parstack];
357: $code =~ s/\"//g;
358: $code .=';return $condition;';
359:
360: push( @Apache::structuretags::whileconds, $code);
361: my $result = &Apache::run::run($code,$safeeval);
362: my $bodytext=$$parser[$#$parser]->get_text("/while");
363: push( @Apache::structuretags::whilebody, $bodytext);
364: if ( $result ) {
365: &Apache::lonxml::newparser($parser,\$bodytext);
366: }
367: return "";
368: }
369:
370: sub end_while {
371: my ($target,$token,$tagstack,$parstack,$parser,$safeeval)=@_;
372: my $code = pop @Apache::structuretags::whileconds;
373: my $bodytext = pop @Apache::structuretags::whilebody;
374: my $result = &Apache::run::run($code,$safeeval);
375: if ( $result ) {
376: &Apache::lonxml::newparser($parser,\$bodytext);
377: }
378: return "";
379: }
380:
381: # <randomlist>
382: # <tag1>..</tag1>
383: # <tag2>..</tag2>
384: # <tag3>..</tag3>
385: # ...
386: # </randomlist>
387: sub start_randomlist {
388: my ($target,$token,$tagstack,$parstack,$parser,$safeeval)=@_;
389: if ($target eq 'answer' || $target eq 'grade' || $target eq 'web') {
390: my $body= &Apache::lonxml::get_all_text("/randomlist",$$parser[$#$parser]);
391: my $b_parser= HTML::TokeParser->new(\$body);
392: my $b_tok;
393: my @randomlist;
394: my $list_item;
395: while($b_tok = $b_parser->get_token() ) {
396: if($b_tok->[0] eq 'S') { # start tag
397: # get content of the tag until matching end tag
398: # get all text upto the matching tag
399: # and push the content into @randomlist
400: $list_item = &Apache::lonxml::get_all_text('/'.$b_tok->[1],$b_parser);
401: $list_item = "$b_tok->[4]"."$list_item"."</$b_tok->[1]>";
402: push(@randomlist,$list_item);
403: # print "<br /><b>START-TAG $b_tok->[1], $b_tok->[4], $list_item</b>";
404: }
405: if($b_tok->[0] eq 'T') { # text
406: # what to do with text in between tags?
407: # print "<b>TEXT $b_tok->[1]</b><br />";
408: }
409: # if($b_tok->[0] eq 'E') { # end tag, should not happen
410: # print "<b>END-TAG $b_tok->[1]</b><br />";
411: # }
412: }
413:
414: my @idx_arr = (0 .. $#randomlist);
415: &Apache::structuretags::shuffle(\@idx_arr);
416: my $bodytext = '';
417: for(0 .. $#randomlist) {
418: $bodytext .= "$randomlist[ $idx_arr[$_] ]";
419: }
420: &Apache::lonxml::newparser($parser,\$bodytext);
421: }
422: return "";
423: }
424:
425: sub shuffle {
426: my $a=shift;
427: my $i;
428: if (defined(@$a)) {
429: &Apache::response::setrandomnumber();
430: for($i=@$a;--$i;) {
431: my $j=int rand($i+1);
432: next if $i == $j;
433: @$a[$i,$j] = @$a[$j,$i];
434: }
435: }
436: }
437:
438: sub end_randomlist {
439: return '';
440: }
441:
442: sub start_part {
443: my ($target,$token,$tagstack,$parstack,$parser,$safeeval)=@_;
444: my $id= &Apache::lonxml::get_param('id',$parstack,$safeeval);
445: if ($id eq '') { $id = $Apache::lonxml::curdepth; }
446: $Apache::inputtags::part=$id;
447: @Apache::inputtags::responselist = ();
448: @Apache::inputtags::previous=();
449: if ($target eq 'meta') {
450: return &Apache::response::mandatory_part_meta;
451: } elsif ($target eq 'web' || $target eq 'grade' || $target eq 'answer') {
452: my ($status,$accessmsg) = &Apache::lonhomework::check_access($id);
453: push (@Apache::inputtags::status,$status);
454: my $expression='$external::datestatus="'.$status.'";';
455: $expression.='$external::gradestatus="'.$Apache::lonhomework::history{"resource.$id.solved"}.'";';
456: &Apache::run::run($expression,$safeeval);
457: if ( $status eq 'CLOSED' ) {
458: my $bodytext=&Apache::lonxml::get_all_text("/part",$$parser[$#$parser]);
459: if ( $target eq "web" ) {
460: return "<br />Part is not open to be viewed. It $accessmsg<br />";
461: }
462: }
463: }
464: return '';
465: }
466:
467: sub end_part {
468: my ($target,$token,$tagstack,$parstack,$parser,$safeeval)=@_;
469: &Apache::lonxml::debug("in end_part $target ");
470: my $status=$Apache::inputtags::status['-1'];
471: pop @Apache::inputtags::status;
472: if ( $target eq 'meta' ) { return ''; }
473: if ( $target eq 'grade' && $status eq 'CAN_ANSWER') {
474: return &Apache::inputtags::grade;
475: }
476: if ($target eq 'web') {
477: return &Apache::inputtags::gradestatus($Apache::inputtags::part);
478: }
479: return '';
480: }
481:
482: sub start_preduedate {
483: my ($target,$token,$tagstack,$parstack,$parser,$safeeval)=@_;
484: if ($target eq 'web' || $target eq 'grade' || $target eq 'answer') {
485: if ($Apache::inputtags::status['-1'] ne 'CAN_ANSWER' &&
486: $Apache::inputtags::status['-1'] ne 'CANNOT_ANSWER' ) {
487: &Apache::lonxml::get_all_text("/preduedate",$$parser[$#$parser]);
488: }
489: }
490: return '';
491: }
492:
493: sub end_preduedate {
494: return '';
495: }
496:
497: sub start_postanswerdate {
498: my ($target,$token,$tagstack,$parstack,$parser,$safeeval)=@_;
499: if ($target eq 'web' || $target eq 'grade') {
500: if ($Apache::inputtags::status['-1'] ne 'SHOW_ANSWER') {
501: &Apache::lonxml::get_all_text("/postanswerdate",$$parser[$#$parser]);
502: }
503: }
504: return '';
505: }
506:
507: sub end_postanswerdate {
508: return '';
509: }
510:
511: sub start_notsolved {
512: my ($target,$token,$tagstack,$parstack,$parser,$safeeval)=@_;
513: if ($target eq 'web' || $target eq 'grade' || $target eq 'answer') {
514: my $gradestatus=$Apache::lonhomework::history{"resource.$Apache::inputtags::part.solved"};
515: &Apache::lonxml::debug("not solved has :$gradestatus:");
516: if ($gradestatus =~ /^correct/) {
517: &Apache::lonxml::debug("skipping");
518: &Apache::lonxml::get_all_text("/notsolved",$$parser[$#$parser]);
519: }
520: }
521: return '';
522: }
523:
524: sub end_notsolved {
525: return '';
526: }
527:
528: sub start_solved {
529: my ($target,$token,$tagstack,$parstack,$parser,$safeeval)=@_;
530: if ($target eq 'web' || $target eq 'grade' || $target eq 'answer') {
531: my $gradestatus=$Apache::lonhomework::history{"resource.$Apache::inputtags::part.solved"};
532: if ($gradestatus !~ /^correct/) {
533: &Apache::lonxml::get_all_text("/solved",$$parser[$#$parser]);
534: }
535: }
536: return '';
537: }
538:
539: sub end_solved {
540: return '';
541: }
542:
543: sub start_startouttext {
544: my ($target,$token,$tagstack,$parstack,$parser,$safeeval)=@_;
545: my @result=(''.'');
546: if ($target eq 'edit' || $target eq 'modified' ) { @result=('','no'); }
547: return (@result);
548: }
549: sub end_startouttext {
550: my ($target,$token,$tagstack,$parstack,$parser,$safeeval)=@_;
551: my $result='';
552: my $text='';
553:
554: if ($target eq 'edit') {
555: $text=&Apache::lonxml::get_all_text("endouttext",$$parser[-1]);
556: $result.=&Apache::edit::start_table($token)."<tr><td>Text Block</td>
557: <td>Delete:".
558: &Apache::edit::deletelist($target,$token)
559: ."</td>
560: <td>".
561: &Apache::edit::insertlist($target,$token).
562: "</td>
563: </tr><tr><td colspan=\"3\">\n".
564: &Apache::edit::editfield($token->[1],$text,"",50,4);
565: }
566: if ($target eq 'modified') {
567: $text=&Apache::lonxml::get_all_text("endouttext",$$parser['-1']);
568: $result='<startouttext />'.&Apache::edit::modifiedfield();
569: }
570: return $result;
571: }
572: sub start_endouttext {
573: my ($target,$token,$tagstack,$parstack,$parser,$safeeval)=@_;
574: my $result='';
575: if ($target eq "edit" ) { $result="</td></tr>".&Apache::edit::end_table()."\n"; }
576: if ($target eq "modified") { $result='<endouttext />'; }
577: return $result;
578: }
579: sub end_endouttext {
580: my ($target,$token,$tagstack,$parstack,$parser,$safeeval)=@_;
581: my @result=('','');
582: if ($target eq "edit" || $target eq 'modified') { @result=('','no'); }
583: return (@result);
584: }
585: sub delete_startouttext {
586: my ($target,$token,$tagstack,$parstack,$parser,$safeeval)=@_;
587: # my $text=&Apache::lonxml::get_all_text("endouttext",$$parser['-1']);
588: my $text=$$parser['-1']->get_text("/endouttext");
589: my $ntoken=$$parser['-1']->get_token();
590: &Apache::lonxml::debug("Deleting :$text: and :$ntoken->[0]:$ntoken->[1]:$ntoken->[2]: for startouttext");
591: &Apache::lonxml::end_tag($tagstack,$parstack,$ntoken);
592: # Deleting 2 parallel tag pairs, but we need the numbers later to look like
593: # they did the last time round
594: &Apache::lonxml::increasedepth($ntoken);
595: &Apache::lonxml::decreasedepth($ntoken);
596: return 1;
597: }
598:
599: 1;
600: __END__
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