1: # The LearningOnline Network with CAPA
2: # definition of tags that give a structure to a document
3: #
4: # $Id: structuretags.pm,v 1.95 2002/05/24 21:57:38 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: $rndseed.'" />
267: <input type="submit" name="changerandseed" value="Change" />
268: <input type="submit" name="resetdata" value="Reset Submissions" />
269: <input type="checkbox" name="showallfoils" ';
270: if (defined($ENV{'form.showallfoils'})) { $result.='checked="on"'; }
271: $result.= ' /> Show All Foils
272: <hr />';
273: }
274: # if we are viewing someone else preserve that info
275: if (defined $ENV{'form.grade_symb'}) {
276: foreach my $field ('symb','courseid','domain','username') {
277: $result .= '<input type="hidden" name="grade_'.$field.
278: '" value="'.$ENV{"form.grade_$field"}.'" />'."\n";
279: }
280: }
281: } elsif ($status eq 'SHOW_ANSWER' || $status eq 'CANNOT_ANSWER'
282: || $status eq 'CLOSED') {
283: $result.=$head_tag_start.
284: "<title>$name</title></head>\n$body_tag_start\n";
285: }
286: }
287: } elsif ($target eq 'edit') {
288: $result.=$head_tag_start."</head>".$body_tag_start.
289: '<form name="lonhomework" method="POST" action="'.
290: $ENV{'request.uri'}.'">
291: <input type="hidden" name="submitted" value="edit" />
292: <input type="hidden" name="problemmode" value="Edit" />
293: <input type="submit" name="problemmode" value="View" />
294: <input type="submit" name="problemmode" value="EditXML" />
295: <input type="submit" name="Undo" value="undo" /> <hr />
296: <input type="submit" name="submit" value="Submit Changes" /><br />
297: ';
298: my $temp=&Apache::edit::insertlist($target,$token);
299: $result.=$temp;
300: } elsif ($target eq 'modified') {
301: $result=$token->[4];
302: $result.=&Apache::edit::handle_insert();
303: } elsif ($target eq 'tex') {
304: $result .= '\begin{document} ';
305: } else {
306: # page_start returned a starting result, delete it if we don't need it
307: $result = '';
308: }
309: return $result;
310: }
311:
312: sub end_problem {
313: my ($target,$token,$tagstack,$parstack,$parser,$safeeval)=@_;
314: my $result='';
315: my $status=$Apache::inputtags::status['-1'];
316: if ($target eq 'grade' || $target eq 'web' || $target eq 'answer' ) {
317: if ( $target eq 'grade' && $Apache::inputtags::part eq '0') {
318: # if part is zero, no <part>s existed, so we need to the grading
319: &Apache::inputtags::grade;
320: } elsif ( $target eq 'web' && $Apache::inputtags::part eq '0' &&
321: $status ne 'UNCHECKEDOUT') {
322: # if part is zero, no <part>s existed, so we need show the current
323: # grading status
324: $result.= &Apache::inputtags::gradestatus($Apache::inputtags::part);
325: }
326: if (
327: ($target eq 'web' && ($ENV{'request.state'} ne 'construct')) ||
328: ($target eq 'answer')
329: ) {
330: if ($status eq 'CAN_ANSWER') {
331: $result.="</form></body>\n";
332: } elsif ($status eq 'SHOW_ANSWER' || $status eq 'CANNOT_ANSWER' ||
333: $status eq 'UNCHECKEDOUT' ) {
334: $result.="</body>\n";
335: }
336: $result.=&Apache::lonxml::xmlend();
337: }
338: if ($target eq 'grade') {
339: &Apache::lonhomework::showhash(%Apache::lonhomework::results);
340: &finalize_storage();
341: }
342: } elsif ($target eq 'meta') {
343: if ($Apache::inputtags::part eq '0') {
344: $result=&Apache::response::mandatory_part_meta;
345: }
346: } elsif ($target eq 'edit') {
347: &Apache::lonxml::debug("in end_problem with $target, edit");
348: $result='<br /><input type="submit" name="submit" value="Submit Changes" />';
349: } elsif ($target eq 'tex') {
350: $result .= '\vskip 0.5mm\noindent\makebox[9.0cm][b]{\hrulefill}\end{document}';
351: }
352: return $result;
353: }
354:
355: sub start_library {
356: my ($target,$token,$tagstack,$parstack,$parser,$safeeval)=@_;
357: my ($result,$head_tag_start,$body_tag_start)=
358: &page_start($target,$token,$tagstack,$parstack,$parser,$safeeval);
359: if ($target eq 'edit') {
360: $result.=$head_tag_start."</head>".$body_tag_start.
361: '<form name="lonhomework" method="POST" action="'.$ENV{'request.uri'}.'">
362: <input type="hidden" name="submitted" value="edit" />
363: <input type="hidden" name="problemmode" value="Edit" />
364: <input type="submit" name="problemmode" value="View" />
365: <input type="submit" name="Undo" value="undo" /> <hr />
366: ';
367: my $temp=&Apache::edit::insertlist($target,$token);
368: $result.=$temp;
369: return $result;
370: }
371: if ($target eq 'modified') {
372: $result=$token->[4];
373: $result.=&Apache::edit::handle_insert();
374: return $result;
375: }
376: return '';
377: }
378:
379: sub end_library {
380: my ($target,$token,$tagstack,$parstack,$parser,$safeeval)=@_;
381: my $result='';
382: if ($target eq 'edit') {
383: $result='<br /><input type="submit" name="submit" value="Submit Changes" />';
384: }
385: return $result;
386: }
387:
388: sub start_block {
389: my ($target,$token,$tagstack,$parstack,$parser,$safeeval)=@_;
390:
391: if ($target eq 'web' || $target eq 'grade' || $target eq 'answer') {
392: my $code = @$parstack[$#$parstack];
393: $code =~ s/\"//g;
394: $code .=';return $condition;';
395: # print "<br />$code<br />";
396: my $result = &Apache::run::run($code,$safeeval);
397: &Apache::lonxml::debug("block :$code: returned :$result:");
398: if ( ! $result ) {
399: my $skip=&Apache::lonxml::get_all_text("/block",$$parser[$#$parser]);
400: &Apache::lonxml::debug("skipping ahead :$skip: $$parser[$#$parser]");
401: }
402: }
403: return "";
404: }
405:
406: sub end_block {
407: return '';
408: }
409:
410: sub start_while {
411: my ($target,$token,$tagstack,$parstack,$parser,$safeeval)=@_;
412:
413: my $code = @$parstack[$#$parstack];
414: $code =~ s/\"//g;
415: $code .=';return $condition;';
416:
417: push( @Apache::structuretags::whileconds, $code);
418: my $result = &Apache::run::run($code,$safeeval);
419: my $bodytext=$$parser[$#$parser]->get_text("/while");
420: push( @Apache::structuretags::whilebody, $bodytext);
421: if ( $result ) {
422: &Apache::lonxml::newparser($parser,\$bodytext);
423: }
424: return "";
425: }
426:
427: sub end_while {
428: my ($target,$token,$tagstack,$parstack,$parser,$safeeval)=@_;
429: my $code = pop @Apache::structuretags::whileconds;
430: my $bodytext = pop @Apache::structuretags::whilebody;
431: my $result = &Apache::run::run($code,$safeeval);
432: if ( $result ) {
433: &Apache::lonxml::newparser($parser,\$bodytext);
434: }
435: return "";
436: }
437:
438: # <randomlist>
439: # <tag1>..</tag1>
440: # <tag2>..</tag2>
441: # <tag3>..</tag3>
442: # ...
443: # </randomlist>
444: sub start_randomlist {
445: my ($target,$token,$tagstack,$parstack,$parser,$safeeval)=@_;
446: my $result;
447: if ($target eq 'answer' || $target eq 'grade' || $target eq 'web') {
448: my $body= &Apache::lonxml::get_all_text("/randomlist",$$parser[$#$parser]);
449: my $b_parser= HTML::TokeParser->new(\$body);
450: my $b_tok;
451: my @randomlist;
452: my $list_item;
453: while($b_tok = $b_parser->get_token() ) {
454: if($b_tok->[0] eq 'S') { # start tag
455: # get content of the tag until matching end tag
456: # get all text upto the matching tag
457: # and push the content into @randomlist
458: $list_item = &Apache::lonxml::get_all_text('/'.$b_tok->[1],$b_parser);
459: $list_item = "$b_tok->[4]"."$list_item"."</$b_tok->[1]>";
460: push(@randomlist,$list_item);
461: # print "<br /><b>START-TAG $b_tok->[1], $b_tok->[4], $list_item</b>";
462: }
463: if($b_tok->[0] eq 'T') { # text
464: # what to do with text in between tags?
465: # print "<b>TEXT $b_tok->[1]</b><br />";
466: }
467: # if($b_tok->[0] eq 'E') { # end tag, should not happen
468: # print "<b>END-TAG $b_tok->[1]</b><br />";
469: # }
470: }
471: my @idx_arr = (0 .. $#randomlist);
472: &Apache::structuretags::shuffle(\@idx_arr);
473: my $bodytext = '';
474: my $show=$#randomlist;
475: my $showarg=&Apache::lonxml::get_param('show',$parstack,$safeeval);
476: $showarg--;
477: if ( ($showarg >= 0) && ($showarg < $show) ) { $show = $showarg; }
478: for(0 .. $show) {
479: $bodytext .= "$randomlist[ $idx_arr[$_] ]";
480: }
481: &Apache::lonxml::newparser($parser,\$bodytext);
482: } elsif ($target eq 'edit' ) {
483: $result .= &Apache::edit::tag_start($target,$token);
484: $result .= &Apache::edit::text_arg('Maximum Tags to Show:','show',$token,5);
485: $result .= &Apache::edit::end_row().&Apache::edit::start_spanning_row();
486: } elsif ($target eq 'modified' ) {
487: my $constructtag=&Apache::edit::get_new_args($token,$parstack,$safeeval,
488: 'show');
489: if ($constructtag) { $result = &Apache::edit::rebuild_tag($token); }
490: }
491: return $result;
492: }
493:
494: sub shuffle {
495: my $a=shift;
496: my $i;
497: if (defined(@$a)) {
498: &Apache::response::setrandomnumber();
499: for($i=@$a;--$i;) {
500: my $j=int rand($i+1);
501: next if $i == $j;
502: @$a[$i,$j] = @$a[$j,$i];
503: }
504: }
505: }
506:
507: sub end_randomlist {
508: my ($target,$token,$tagstack,$parstack,$parser,$safeeval)=@_;
509: my $result;
510: if ($target eq 'edit' ) {
511: $result=&Apache::edit::tag_end($target,$token,'End Randomly Parsed Block');
512: }
513: return $result;
514: }
515:
516: sub start_part {
517: my ($target,$token,$tagstack,$parstack,$parser,$safeeval)=@_;
518: my $result='';
519: my $id= &Apache::lonxml::get_param('id',$parstack,$safeeval);
520: if ($id eq '') { $id = $Apache::lonxml::curdepth; }
521: $Apache::inputtags::part=$id;
522: @Apache::inputtags::responselist = ();
523: @Apache::inputtags::previous=();
524: if ($target eq 'meta') {
525: return &Apache::response::mandatory_part_meta;
526: } elsif ($target eq 'web' || $target eq 'grade' || $target eq 'answer' || $target eq 'tex') {
527: my ($status,$accessmsg) = &Apache::lonhomework::check_access($id);
528: push (@Apache::inputtags::status,$status);
529: my $expression='$external::datestatus="'.$status.'";';
530: $expression.='$external::gradestatus="'.$Apache::lonhomework::history{"resource.$id.solved"}.'";';
531: &Apache::run::run($expression,$safeeval);
532: if ( $status eq 'CLOSED' ) {
533: my $bodytext=&Apache::lonxml::get_all_text("/part",$$parser[$#$parser]);
534: if ( $target eq "web" ) {
535: $result="<br />Part is not open to be viewed. It $accessmsg<br />";
536: } elsif ( $target eq 'tex' ) {
537: $result="\\vskip 0 mm Part is not open to be viewed. It $accessmsg \\\\";
538: }
539: } else {
540: if ($target eq 'tex') {
541: $result='\vskip 0 mm';
542: }
543: }
544: }
545: return $result;
546: }
547:
548: sub end_part {
549: my ($target,$token,$tagstack,$parstack,$parser,$safeeval)=@_;
550: &Apache::lonxml::debug("in end_part $target ");
551: my $status=$Apache::inputtags::status['-1'];
552: pop @Apache::inputtags::status;
553: if ( $target eq 'meta' ) { return ''; }
554: if ( $target eq 'grade' && $status eq 'CAN_ANSWER') {
555: return &Apache::inputtags::grade;
556: }
557: if ($target eq 'web') {
558: return &Apache::inputtags::gradestatus($Apache::inputtags::part);
559: }
560: return '';
561: }
562:
563: sub start_preduedate {
564: my ($target,$token,$tagstack,$parstack,$parser,$safeeval)=@_;
565: if ($target eq 'web' || $target eq 'grade' || $target eq 'answer') {
566: if ($Apache::inputtags::status['-1'] ne 'CAN_ANSWER' &&
567: $Apache::inputtags::status['-1'] ne 'CANNOT_ANSWER' ) {
568: &Apache::lonxml::get_all_text("/preduedate",$$parser[$#$parser]);
569: }
570: }
571: return '';
572: }
573:
574: sub end_preduedate {
575: return '';
576: }
577:
578: sub start_postanswerdate {
579: my ($target,$token,$tagstack,$parstack,$parser,$safeeval)=@_;
580: if ($target eq 'web' || $target eq 'grade') {
581: if ($Apache::inputtags::status['-1'] ne 'SHOW_ANSWER') {
582: &Apache::lonxml::get_all_text("/postanswerdate",$$parser[$#$parser]);
583: }
584: }
585: return '';
586: }
587:
588: sub end_postanswerdate {
589: return '';
590: }
591:
592: sub start_notsolved {
593: my ($target,$token,$tagstack,$parstack,$parser,$safeeval)=@_;
594: if ($target eq 'web' || $target eq 'grade' || $target eq 'answer') {
595: my $gradestatus=$Apache::lonhomework::history{"resource.$Apache::inputtags::part.solved"};
596: &Apache::lonxml::debug("not solved has :$gradestatus:");
597: if ($gradestatus =~ /^correct/) {
598: &Apache::lonxml::debug("skipping");
599: &Apache::lonxml::get_all_text("/notsolved",$$parser[$#$parser]);
600: }
601: }
602: return '';
603: }
604:
605: sub end_notsolved {
606: return '';
607: }
608:
609: sub start_solved {
610: my ($target,$token,$tagstack,$parstack,$parser,$safeeval)=@_;
611: if ($target eq 'web' || $target eq 'grade' || $target eq 'answer') {
612: my $gradestatus=$Apache::lonhomework::history{"resource.$Apache::inputtags::part.solved"};
613: if ($gradestatus !~ /^correct/) {
614: &Apache::lonxml::get_all_text("/solved",$$parser[$#$parser]);
615: }
616: }
617: return '';
618: }
619:
620: sub end_solved {
621: return '';
622: }
623:
624: sub start_startouttext {
625: my ($target,$token,$tagstack,$parstack,$parser,$safeeval)=@_;
626: my @result=(''.'');
627: if ($target eq 'edit' || $target eq 'modified' ) { @result=('','no'); }
628: return (@result);
629: }
630: sub end_startouttext {
631: my ($target,$token,$tagstack,$parstack,$parser,$safeeval)=@_;
632: my $result='';
633: my $text='';
634:
635: if ($target eq 'edit') {
636: $text=&Apache::lonxml::get_all_text("endouttext",$$parser[-1]);
637: $result.=&Apache::edit::start_table($token)."<tr><td>Text Block</td>
638: <td>Delete:".
639: &Apache::edit::deletelist($target,$token)
640: ."</td>
641: <td>".
642: &Apache::edit::insertlist($target,$token).
643: &Apache::edit::end_row().&Apache::edit::start_spanning_row()."\n".
644: &Apache::edit::editfield($token->[1],$text,"",50,4);
645: }
646: if ($target eq 'modified') {
647: $text=&Apache::lonxml::get_all_text("endouttext",$$parser['-1']);
648: $result='<startouttext />'.&Apache::edit::modifiedfield();
649: }
650: if ($target eq 'tex') {
651: $result .= '\noindent ';
652: }
653: return $result;
654: }
655: sub start_endouttext {
656: my ($target,$token,$tagstack,$parstack,$parser,$safeeval)=@_;
657: my $result='';
658: if ($target eq "edit" ) { $result="</td></tr>".&Apache::edit::end_table()."\n"; }
659: if ($target eq "modified") { $result='<endouttext />'; }
660: return $result;
661: }
662: sub end_endouttext {
663: my ($target,$token,$tagstack,$parstack,$parser,$safeeval)=@_;
664: my @result=('','');
665: if ($target eq "edit" || $target eq 'modified') { @result=('','no'); }
666: return (@result);
667: }
668: sub delete_startouttext {
669: my ($target,$token,$tagstack,$parstack,$parser,$safeeval)=@_;
670: # my $text=&Apache::lonxml::get_all_text("endouttext",$$parser['-1']);
671: my $text=$$parser['-1']->get_text("/endouttext");
672: my $ntoken=$$parser['-1']->get_token();
673: &Apache::lonxml::debug("Deleting :$text: and :$ntoken->[0]:$ntoken->[1]:$ntoken->[2]: for startouttext");
674: &Apache::lonxml::end_tag($tagstack,$parstack,$ntoken);
675: # Deleting 2 parallel tag pairs, but we need the numbers later to look like
676: # they did the last time round
677: &Apache::lonxml::increasedepth($ntoken);
678: &Apache::lonxml::decreasedepth($ntoken);
679: return 1;
680: }
681:
682: 1;
683: __END__
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