1: # The LearningOnline Network with CAPA
2: # definition of tags that give a structure to a document
3: #
4: # $Id: structuretags.pm,v 1.135 2002/11/11 22:37:23 www 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:
33: package Apache::structuretags;
34:
35: use strict;
36: use Apache::lonnet;
37: use Apache::File();
38:
39: BEGIN {
40: &Apache::lonxml::register('Apache::structuretags',('block','while','randomlist','problem','library','web','tex','part','preduedate','postanswerdate','solved','notsolved','startouttext','endouttext'));
41: # &Apache::lonxml::register_insert('problem','',('part','postanswerdate','preduedate'))
42: }
43:
44: sub start_web {
45: my ($target,$token,$tagstack,$parstack,$parser,$safeeval)=@_;
46: my $bodytext=&Apache::lonxml::get_all_text("/web",$$parser[$#$parser]);
47: if ($target eq 'web') {
48: return $bodytext;
49: }
50: return '';
51: }
52:
53: sub end_web {
54: return '';
55: }
56:
57: sub start_tex {
58: my ($target,$token,$tagstack,$parstack,$parser,$safeeval)=@_;
59: my $bodytext=&Apache::lonxml::get_all_text("/tex",$$parser[$#$parser]);
60: if ($target eq 'tex') {
61: return $bodytext.' ';
62: }
63: return '';
64: }
65:
66: sub end_tex {
67: return '';
68: }
69:
70: sub page_start {
71: my ($target,$token,$tagstack,$parstack,$parser,$safeeval)=@_;
72: my %found;
73: foreach my $taginside ($tagstack) {
74: foreach my $taglookedfor ('html','body','form') {
75: if ($taginside =~ /^$taglookedfor$/i) { $found{$taglookedfor} = 1; }
76: }
77: }
78:
79: my $result;
80: my $head_tag_start;
81: if (!defined($found{'html'})) {
82: $result=&Apache::londefdef::start_html($target,$token,$tagstack,$parstack,
83: $parser,$safeeval);
84: $head_tag_start='<head>'.&Apache::lonxml::registerurl(undef,$target);
85: }
86: my $body_tag_start;
87: if (!defined($found{'body'})) {
88: $body_tag_start='<body onLoad="'.&Apache::lonxml::loadevents().'" '.
89: 'onUnload="'.&Apache::lonxml::unloadevents().'" ';
90: my $background=&Apache::lonxml::get_param('background',$parstack,$safeeval);
91: if ($background) {
92: $Apache::lonxml::extlinks[$#Apache::lonxml::extlinks+1]=
93: $background;
94: $body_tag_start.='background="'.$background.'" ';
95: } else {
96: my $bgcolor=&Apache::lonxml::get_param('bgcolor',$parstack,$safeeval);
97: if ($bgcolor) {
98: $body_tag_start.='bgcolor="'.$bgcolor.'" ';
99: } else {
100: $body_tag_start.='bgcolor="#ffffff"';
101: }
102: }
103: $body_tag_start.='>';
104: if ($target eq 'web' && $ENV{'request.state'} ne 'construct') {
105: my ($symb)=&Apache::lonxml::whichuser();
106: if ($symb eq '') {
107: my $help = &Apache::loncommon::help_open_topic("Ambiguous_Reference");
108: $help="Browsing or <a href=\"/adm/ambiguous\">ambiguous</a> reference, submissions ignored $help<br />";
109: $body_tag_start.=$help;
110: }
111: }
112: }
113: my $form_tag_start;
114: if (!defined($found{'form'})) {
115: $form_tag_start='<form name="lonhomework" method="POST" action="'.
116: $ENV{'request.uri'}.'">';
117: }
118: return ($result,$head_tag_start,$body_tag_start,$form_tag_start);
119: }
120:
121: sub get_resource_name {
122: my ($parstack,$safeeval)=@_;
123: my $name=&Apache::lonxml::get_param('name',$parstack,$safeeval);
124: if ($name eq '') {
125: $name=&Apache::lonnet::EXT('resource.title');
126: if ($name eq 'con_lost') { $name = ''; }
127: }
128: $Apache::lonhomework::name=$name;
129: return $name;
130: }
131:
132: sub setup_rndseed {
133: my ($safeeval)=@_;
134: my $rndseed;
135: if ($ENV{'request.state'} eq "construct") {
136: $rndseed=$ENV{'form.rndseed'};
137: if (!$rndseed) {
138: $rndseed=time;
139: $ENV{'form.rndseed'}=$rndseed;
140: }
141: &Apache::run::run('$external::randomseed='.$rndseed.';',$safeeval);
142: }
143: return $rndseed;
144: }
145:
146: sub problem_edit_header {
147: return '<input type="hidden" name="submitted" value="edit" />
148: <input type="hidden" name="problemmode" value="Edit" />
149: <input type="submit" name="problemmode" value="Discard Edits and View" />
150: <input type="submit" name="problemmode" value="EditXML" />
151: <input type="submit" name="Undo" value="undo" /> <hr />
152: <input type="submit" name="submit" value="Submit Changes and Edit" />
153: <input type="submit" name="submit" value="Submit Changes and View" /><br /><p> </p><table border="0"><tr><td bgcolor="#DDDDDD">
154: ';
155: }
156:
157: sub problem_edit_footer {
158: return '</td></tr></table><br /><input type="submit" name="submit" value="Submit Changes and Edit" />
159: <input type="submit" name="submit" value="Submit Changes and View" />';
160: }
161:
162: sub problem_web_to_edit_header {
163: my ($rndseed)=@_;
164: my $result.='<input type="hidden" name="problemmode" value="View" />
165: <input type="submit" name="problemmode" value="Edit" />
166: <input type="submit" name="problemmode" value="EditXML" />
167: Random Seed:<input type="text" name="rndseed" width="10" value="'.
168: $rndseed.'" />
169: <input type="submit" name="changerandseed" value="Change" />
170: <input type="submit" name="resetdata" value="Reset Submissions" />
171: <input type="checkbox" name="showallfoils" ';
172: if (defined($ENV{'form.showallfoils'})) { $result.='checked="on"'; }
173: $result.= ' /> Show All Foils
174: <hr />';
175: my $numtoanalyze=$ENV{'form.numtoanalyze'};
176: if (!$numtoanalyze) { $numtoanalyze=100; }
177: #DISABLED for now.
178: #$result.= '<input type="submit" name="problemmode" value="Answer Distribution" />
179: # <input type="text" name="numtoanalyze" value="'.
180: # $numtoanalyze.'" size="5" /> <hr />';
181: return $result;
182: }
183:
184: sub initialize_storage {
185: %Apache::lonhomework::results=();
186: my ($symb,$courseid,$domain,$name) = &Apache::lonxml::whichuser();
187: if ($ENV{'request.state'} eq 'construct') {
188: %Apache::lonhomework::history=
189: &Apache::lonnet::tmprestore($ENV{'request.uri'},'',$domain,$name);
190: my ($temp)=keys %Apache::lonhomework::history ;
191: &Apache::lonxml::debug("Return message of $temp");
192: } else {
193: %Apache::lonhomework::history=
194: &Apache::lonnet::restore($symb,$courseid,$domain,$name);
195: }
196: #ignore error conditions
197: my ($temp)=keys %Apache::lonhomework::history ;
198: if ($temp =~ m/^error:.*/) { %Apache::lonhomework::history=(); }
199: }
200:
201: # -------------------------------------------------------------finalize_storage
202: # Stores away the result has to a student's environment
203: # checks form.grade_ for specific values, other wises stores
204: # to the running users environment
205: sub finalize_storage {
206: my $result;
207: my ($temp) = keys %Apache::lonhomework::results;
208: if ( $temp ne '' ) {
209: my ($symb,$courseid,$domain,$name) = &Apache::lonxml::whichuser();
210: if ($ENV{'request.state'} eq 'construct') {
211: $result=&Apache::lonnet::tmpstore(\%Apache::lonhomework::results,
212: $ENV{'request.uri'},'',$domain,$name);
213: &Apache::lonxml::debug('Construct Store return message:'.$result);
214: } else {
215: $result=&Apache::lonnet::cstore(\%Apache::lonhomework::results,
216: $symb,$courseid,$domain,$name);
217: &Apache::lonxml::debug('Store return message:'.$result);
218: }
219: }
220: return $result;
221: }
222:
223: sub checkout_msg {
224: return (<<ENDCHECKOUT);
225: <h2>The resource needs to be checked out</h2>
226: As a resource gets checked out, a unique timestamped ID is given to it, and a
227: permanent record is left in the system.<p />
228: <font color=red>
229: Checking out resources is subject to course policies, and may exclude future
230: credit even if done erroneously.<p />
231: </font>
232: <form name="checkout" method="POST" action="$ENV{'request.uri'}">
233: <input type="hidden" name="doescheckout" value="yes" />
234: <input type="button" name="checkoutbutton" value="Check out Exam for Viewing" onClick="javascript:if (confirm('Check out Exam?')) { document.checkout.submit(); }" />
235: </form>
236: ENDCHECKOUT
237: }
238:
239: sub start_problem {
240: my ($target,$token,$tagstack,$parstack,$parser,$safeeval)=@_;
241:
242: # meta is called from lonpublisher, which doesn't uses the normal
243: # lonhomework method of parsing the file which means that inputtags
244: # won't get reset
245: if ( $Apache::inputtags::part ne '' && $target != 'meta' ) {
246: &Apache::lonxml::error('Only one problem allowed in a .problem file');
247: my $bodytext=&Apache::lonxml::get_all_text("/problem",$$parser[-1]);
248: return '';
249: }
250: #intialize globals
251: $Apache::inputtags::part='0';
252: @Apache::inputtags::responselist = ();
253: @Apache::inputtags::previous=();
254: if ($target ne 'analyze') {
255: &initialize_storage();
256: if ($target eq 'web') {
257: &Apache::lonhomework::showhash(%Apache::lonhomework::history);
258: }
259: $Apache::lonhomework::type=&Apache::lonnet::EXT('resource.0.type');
260: &Apache::lonxml::debug("Found this to be of type :$Apache::lonhomework::type:");
261: }
262: if ($Apache::lonhomework::type eq '') {
263: my $uri=$ENV{'request.uri'};
264: if ($uri=~/\.(\w+)$/) {
265: $Apache::lonhomework::type=$1;
266: &Apache::lonxml::debug("Using type of $1");
267: } else {
268: $Apache::lonhomework::type='problem';
269: &Apache::lonxml::debug("Using default type, problem, :$uri:");
270: }
271: }
272:
273: #added vars to the scripting enviroment
274: my $expression='$external::part='.$Apache::inputtags::part.';';
275: &Apache::run::run($expression,$safeeval);
276: my $status;
277: my $accessmsg;
278:
279: #should get back a <html> or the neccesary stuff to start XML/MathML
280: my ($result,$head_tag_start,$body_tag_start,$form_tag_start)=
281: &page_start($target,$token,$tagstack,$parstack,$parser,$safeeval);
282: if ($target eq 'tex' and $ENV{'request.symb'} =~ m/\.page_/) { $result = '';}
283:
284: if ($target eq 'web' || $target eq 'grade' || $target eq 'answer' || $target eq 'tex') {
285: #handle exam checkout
286: if ($Apache::lonhomework::type eq 'exam') {
287: my $token=$Apache::lonhomework::history{"resource.0.outtoken"};
288: if (($ENV{'form.doescheckout'}) && (!$token)) {
289: $token=&Apache::lonxml::maketoken();
290: $Apache::lonhomework::history{"resource.0.outtoken"}=$token;
291: }
292: $body_tag_start.=&Apache::lonxml::printtokenheader($target,$token);
293: }
294:
295: #handle rand seed in construction space
296: my $rndseed=&setup_rndseed($safeeval);
297: ($status,$accessmsg) = &Apache::lonhomework::check_access('0');
298: push (@Apache::inputtags::status,$status);
299: my $expression='$external::datestatus="'.$status.'";';
300: $expression.='$external::gradestatus="'.$Apache::lonhomework::history{"resource.0.solved"}.'";';
301: &Apache::run::run($expression,$safeeval);
302: &Apache::lonxml::debug("Got $status");
303: if (( $status eq 'CLOSED' ) ||
304: ( $status eq 'UNCHECKEDOUT') ||
305: ( $status eq 'BANNED')) {
306: my $bodytext=&Apache::lonxml::get_all_text("/problem",$parser);
307: if ( $target eq "web" ) {
308: $result.= $head_tag_start.'</head>';
309: my $msg=$body_tag_start.
310: '<h1>Not open to be viewed</h1>';
311: if ($status eq 'CLOSED') {
312: $msg.='The problem '.$accessmsg;
313: } elsif ($status eq 'UNCHECKEDOUT') {
314: $msg.=&checkout_msg;
315: }
316: $result.=$msg.'<br />';
317: } elsif ($target eq 'tex') {
318: $result.="\\begin{document}\\noindent \\vskip 1 mm \\begin{minipage}{\\textwidth}\\vskip 0 mm Problem is not open to be viewed. It $accessmsg \\vskip 0 mm ";
319: }
320: } elsif ($target eq 'web') {
321: my $name= &get_resource_name($parstack,$safeeval);
322: if ($status eq 'CAN_ANSWER') {
323: # create a page header and exit
324: $result.="$head_tag_start<title>$name</title></head>
325: $body_tag_start \n $form_tag_start".
326: '<input type="hidden" name="submitted" value="yes" />';
327: if ($ENV{'request.state'} eq "construct") {
328: $result.= &problem_web_to_edit_header($rndseed);
329: }
330: # if we are viewing someone else preserve that info
331: if (defined $ENV{'form.grade_symb'}) {
332: foreach my $field ('symb','courseid','domain','username') {
333: $result .= '<input type="hidden" name="grade_'.$field.
334: '" value="'.$ENV{"form.grade_$field"}.'" />'."\n";
335: }
336: }
337: } elsif ($status eq 'SHOW_ANSWER' || $status eq 'CANNOT_ANSWER'
338: || $status eq 'CLOSED') {
339: $result.=$head_tag_start.
340: "<title>$name</title></head>\n$body_tag_start\n";
341: }
342: } elsif ($target eq 'tex') {
343: my $name= &Apache::lonxml::get_param('name',$parstack,$safeeval);
344: if ($name eq '') {
345: $name=&Apache::lonnet::EXT('resource.title');
346: if ($name eq 'con_lost') { $name = ''; }
347: }
348: $Apache::lonhomework::name=$name;
349: my $id = $Apache::inputtags::part;
350: my $duedate = &Apache::lonnet::EXT("resource.$id.duedate");
351: $duedate = POSIX::strftime("%c",localtime($duedate));
352: my $temp_file;
353: my $filename = "/home/httpd/prtspool/$ENV{'user.name'}_$ENV{'user.domain'}_printout.due";
354: if (-e $filename) {
355: $temp_file = Apache::File->new($filename);
356: } else {
357: $temp_file = Apache::File->new('>>'.$filename);
358: }
359: my @due_file_content = <$temp_file>;
360: my $due_file_content = $due_file_content[$#due_file_content];
361: chomp $due_file_content;
362: if ($due_file_content ne $duedate) {
363: $temp_file = Apache::File->new('>'.$filename);
364: print $temp_file "$duedate\n";
365: if (not $ENV{'request.symb'} =~ m/\.page_/) {
366: if(not $duedate=~m/1969/) {
367: $result .= '\begin{document} \noindent\textit{Due date: '.$duedate.'} \vskip 1 mm\noindent \begin{minipage}{\textwidth}';
368: } else {
369: $result .= '\begin{document} \noindent \vskip 1 mm \noindent\begin{minipage}{\textwidth}';
370: }
371: } else {
372: $result .= '\vskip 1mm\textit{Due date: '.$duedate.'} \\\\\\\\';
373: }
374: } else {
375: if (not $ENV{'request.symb'} =~ m/\.page_/) {
376: $result .= '\begin{document} \noindent \vskip 1 mm\noindent\begin{minipage}{\textwidth}';
377: } else {
378: $result .= '\vskip 1mm \\\\\\\\';
379: }
380: }
381: }
382: } elsif ($target eq 'edit') {
383: $result.=$head_tag_start."</head>".$body_tag_start.$form_tag_start.
384: &problem_edit_header();
385: my $temp=&Apache::edit::insertlist($target,$token);
386: $result.=$temp;
387: } elsif ($target eq 'modified') {
388: $result=$token->[4];
389: $result.=&Apache::edit::handle_insert();
390: } else {
391: # page_start returned a starting result, delete it if we don't need it
392: $result = '';
393: }
394: return $result;
395: }
396:
397: sub end_problem {
398: my ($target,$token,$tagstack,$parstack,$parser,$safeeval)=@_;
399: my $result='';
400: my $status=$Apache::inputtags::status['-1'];
401: if ($target eq 'grade' || $target eq 'web' || $target eq 'answer' || $target eq 'tex') {
402: if ( $target eq 'grade' && $Apache::inputtags::part eq '0') {
403: # if part is zero, no <part>s existed, so we need to the grading
404: &Apache::inputtags::grade;
405: } elsif ( ($target eq 'web' || $target eq 'tex') && $Apache::inputtags::part eq '0' &&
406: $status ne 'UNCHECKEDOUT') {
407: # if part is zero, no <part>s existed, so we need show the current
408: # grading status
409: my $gradestatus = &Apache::inputtags::gradestatus($Apache::inputtags::part,$target);
410: if ($Apache::lonhomework::type ne 'exam') {$result.= $gradestatus;}
411: }
412: if (
413: (($target eq 'web') && ($ENV{'request.state'} ne 'construct')) ||
414: ($target eq 'answer') || ($target eq 'tex')
415: ) {
416: if ($status eq 'CAN_ANSWER') {
417: if ($target ne 'tex') {
418: $result.="</form></body>\n";
419: }
420: } elsif ($status eq 'SHOW_ANSWER' || $status eq 'CANNOT_ANSWER' ||
421: $status eq 'UNCHECKEDOUT' ) {
422: if ($target ne 'tex') {
423: $result.="</body>\n";
424: }
425: }
426: if ($target ne 'tex') {
427: $result.=&Apache::lonxml::xmlend();
428: } else {
429: $result .= '\vskip 0.5mm\noindent\makebox[\textwidth/$number_of_columns][b]{\hrulefill}';
430: if (not $ENV{'request.symb'} =~ m/\.page_/) {
431: $result .= '\end{minipage}\end{document} ';
432: } else {
433: $result .= '';
434: }
435: }
436: }
437: if ($target eq 'grade') {
438: &Apache::lonhomework::showhash(%Apache::lonhomework::results);
439: &finalize_storage();
440: }
441: } elsif ($target eq 'meta') {
442: if ($Apache::inputtags::part eq '0') {
443: $result=&Apache::response::mandatory_part_meta;
444: }
445: } elsif ($target eq 'edit') {
446: &Apache::lonxml::debug("in end_problem with $target, edit");
447: $result = &problem_edit_footer();
448: }
449: return $result;
450: }
451:
452:
453: sub start_library {
454: my ($target,$token,$tagstack,$parstack,$parser,$safeeval)=@_;
455: my ($result,$head_tag_start,$body_tag_start,$form_tag_start);
456:
457: if ($target eq 'edit') {
458: ($result,$head_tag_start,$body_tag_start,$form_tag_start)=
459: &page_start($target,$token,$tagstack,$parstack,$parser,$safeeval);
460: $result.=$head_tag_start."</head>".$body_tag_start.$form_tag_start.
461: &problem_edit_header();
462: my $temp=&Apache::edit::insertlist($target,$token);
463: $result.=$temp;
464: } elsif ($target eq 'modified') {
465: $result=$token->[4];
466: $result.=&Apache::edit::handle_insert();
467: } elsif ($target eq 'web' && $$tagstack[0] ne 'problem' &&
468: $ENV{'request.state'} eq "construct" ) {
469: ($result,$head_tag_start,$body_tag_start,$form_tag_start)=
470: &page_start($target,$token,$tagstack,$parstack,$parser,$safeeval);
471: my $name=&get_resource_name($parstack,$safeeval);
472: my $rndseed=&setup_rndseed($safeeval);
473: $result.="$head_tag_start<title>$name</title></head>
474: $body_tag_start \n $form_tag_start".
475: '<input type="hidden" name="submitted" value="yes" />';
476: $result.=&problem_web_to_edit_header($rndseed);
477: }
478: return $result;
479: }
480:
481: sub end_library {
482: my ($target,$token,$tagstack,$parstack,$parser,$safeeval)=@_;
483: my $result='';
484: if ($target eq 'edit') {
485: $result=&problem_edit_footer();
486: } elsif ($target eq 'web' && $$tagstack[0] ne 'problem' &&
487: $ENV{'request.state'} eq "construct") {
488: $result.='</form></body>'.&Apache::lonxml::xmlend();
489: }
490: return $result;
491: }
492:
493: sub start_block {
494: my ($target,$token,$tagstack,$parstack,$parser,$safeeval)=@_;
495:
496: my $result;
497:
498: if ($target eq 'web' || $target eq 'grade' || $target eq 'answer' ||
499: $target eq 'tex' || $target eq 'analyze') {
500: my $code = @$parstack[$#$parstack];
501: if ($code) {
502: $code =~ s/\"//g;
503: $code .=';return $condition;';
504: $result = &Apache::run::run($code,$safeeval);
505: &Apache::lonxml::debug("block :$code: returned :$result:");
506: } else {
507: $result='1';
508: }
509: if ( ! $result ) {
510: my $skip=&Apache::lonxml::get_all_text("/block",$$parser[-1]);
511: &Apache::lonxml::debug("skipping ahead :$skip: $$parser[-1]");
512: }
513: $result='';
514: } elsif ($target eq 'edit') {
515: $result .=&Apache::edit::tag_start($target,$token);
516: $result .=&Apache::edit::text_arg('Test Condition:','condition',
517: $token,40);
518: $result .=&Apache::edit::end_row().&Apache::edit::start_spanning_row();
519: } elsif ($target eq 'modified') {
520: my $constructtag=&Apache::edit::get_new_args($token,$parstack,
521: $safeeval,'condition');
522: if ($constructtag) { $result = &Apache::edit::rebuild_tag($token); }
523: }
524: return $result;
525: }
526:
527: sub end_block {
528: return '';
529: }
530:
531: sub start_while {
532: my ($target,$token,$tagstack,$parstack,$parser,$safeeval)=@_;
533:
534: my $code = @$parstack[$#$parstack];
535: $code =~ s/\"//g;
536: $code .=';return $condition;';
537:
538: push( @Apache::structuretags::whileconds, $code);
539: my $result = &Apache::run::run($code,$safeeval);
540: my $bodytext=$$parser[$#$parser]->get_text("/while");
541: push( @Apache::structuretags::whilebody, $bodytext);
542: if ( $result ) {
543: &Apache::lonxml::newparser($parser,\$bodytext);
544: }
545: return "";
546: }
547:
548: sub end_while {
549: my ($target,$token,$tagstack,$parstack,$parser,$safeeval)=@_;
550: my $code = pop @Apache::structuretags::whileconds;
551: my $bodytext = pop @Apache::structuretags::whilebody;
552: my $result = &Apache::run::run($code,$safeeval);
553: if ( $result ) {
554: &Apache::lonxml::newparser($parser,\$bodytext);
555: }
556: return "";
557: }
558:
559: # <randomlist show="1">
560: # <tag1>..</tag1>
561: # <tag2>..</tag2>
562: # <tag3>..</tag3>
563: # ...
564: # </randomlist>
565: sub start_randomlist {
566: my ($target,$token,$tagstack,$parstack,$parser,$safeeval)=@_;
567: my $result;
568: if ($target eq 'answer' || $target eq 'grade' || $target eq 'web' ||
569: $target eq 'tex' || $target eq 'analyze') {
570: my $body= &Apache::lonxml::get_all_text("/randomlist",$$parser[$#$parser]);
571: my $b_parser= HTML::TokeParser->new(\$body);
572: my $b_tok;
573: my @randomlist;
574: my $list_item;
575: while($b_tok = $b_parser->get_token() ) {
576: if($b_tok->[0] eq 'S') { # start tag
577: # get content of the tag until matching end tag
578: # get all text upto the matching tag
579: # and push the content into @randomlist
580: $list_item = &Apache::lonxml::get_all_text('/'.$b_tok->[1],$b_parser);
581: $list_item = "$b_tok->[4]"."$list_item"."</$b_tok->[1]>";
582: push(@randomlist,$list_item);
583: # print "<br /><b>START-TAG $b_tok->[1], $b_tok->[4], $list_item</b>";
584: }
585: if($b_tok->[0] eq 'T') { # text
586: # what to do with text in between tags?
587: # print "<b>TEXT $b_tok->[1]</b><br />";
588: }
589: # if($b_tok->[0] eq 'E') { # end tag, should not happen
590: # print "<b>END-TAG $b_tok->[1]</b><br />";
591: # }
592: }
593: my @idx_arr = (0 .. $#randomlist);
594: &Apache::structuretags::shuffle(\@idx_arr);
595: my $bodytext = '';
596: my $show=$#randomlist;
597: my $showarg=&Apache::lonxml::get_param('show',$parstack,$safeeval);
598: $showarg--;
599: if ( ($showarg >= 0) && ($showarg < $show) ) { $show = $showarg; }
600: for(0 .. $show) {
601: $bodytext .= "$randomlist[ $idx_arr[$_] ]";
602: }
603: &Apache::lonxml::newparser($parser,\$bodytext);
604: } elsif ($target eq 'edit' ) {
605: $result .= &Apache::edit::tag_start($target,$token);
606: $result .= &Apache::edit::text_arg('Maximum Tags to Show:','show',$token,5);
607: $result .= &Apache::edit::end_row().&Apache::edit::start_spanning_row();
608: } elsif ($target eq 'modified' ) {
609: my $constructtag=&Apache::edit::get_new_args($token,$parstack,$safeeval,
610: 'show');
611: if ($constructtag) { $result = &Apache::edit::rebuild_tag($token); }
612: }
613: return $result;
614: }
615:
616: sub shuffle {
617: my $a=shift;
618: my $i;
619: if (defined(@$a)) {
620: &Apache::response::setrandomnumber();
621: for($i=@$a;--$i;) {
622: my $j=int(&Math::Random::random_uniform() * ($i+1));
623: next if $i == $j;
624: @$a[$i,$j] = @$a[$j,$i];
625: }
626: }
627: }
628:
629: sub end_randomlist {
630: my ($target,$token,$tagstack,$parstack,$parser,$safeeval)=@_;
631: my $result;
632: if ($target eq 'edit' ) {
633: $result=&Apache::edit::tag_end($target,$token,'End Randomly Parsed Block');
634: }
635: return $result;
636: }
637:
638: sub start_part {
639: my ($target,$token,$tagstack,$parstack,$parser,$safeeval)=@_;
640: my $result='';
641: my $id= &Apache::lonxml::get_param('id',$parstack,$safeeval);
642: if ($id eq '') { $id = $Apache::lonxml::curdepth; }
643: $Apache::inputtags::part=$id;
644: @Apache::inputtags::responselist = ();
645: @Apache::inputtags::previous=();
646: if ($target eq 'meta') {
647: return &Apache::response::mandatory_part_meta;
648: } elsif ($target eq 'web' || $target eq 'grade' || $target eq 'answer' || $target eq 'tex') {
649: my ($status,$accessmsg) = &Apache::lonhomework::check_access($id);
650: push (@Apache::inputtags::status,$status);
651: my $expression='$external::datestatus="'.$status.'";';
652: $expression.='$external::gradestatus="'.$Apache::lonhomework::history{"resource.$id.solved"}.'";';
653: &Apache::run::run($expression,$safeeval);
654: if ( $status eq 'CLOSED' ) {
655: my $bodytext=&Apache::lonxml::get_all_text("/part",$$parser[$#$parser]);
656: if ( $target eq "web" ) {
657: $result="<br />Part is not open to be viewed. It $accessmsg<br />";
658: } elsif ( $target eq 'tex' ) {
659: $result="\\end{minipage}\\vskip 0 mm Part is not open to be viewed. It $accessmsg \\\\\\begin{minipage}{\\textwidth}";
660: }
661: } else {
662: if ($target eq 'tex') {
663: if ($$tagstack[-2] ne 'problem') {
664: $result.='\noindent \end{minipage}\vskip 0 mm \noindent \begin{minipage}{\textwidth}\noindent';
665: }
666: }
667: }
668: } elsif ($target eq 'edit') {
669: $result.=&Apache::edit::tag_start($target,$token);
670: $result.=&Apache::edit::text_arg('Part ID:','id',$token).
671: &Apache::loncommon::help_open_topic("Part_Tag_Edit_Help").
672: &Apache::edit::end_row().&Apache::edit::start_spanning_row();
673:
674: } elsif ($target eq 'modified') {
675: my $constructtag=&Apache::edit::get_new_args($token,$parstack,$safeeval,
676: 'id');
677: if ($constructtag) {
678: $result = &Apache::edit::rebuild_tag($token);
679: $result.=&Apache::edit::handle_insert();
680: }
681: }
682: return $result;
683: }
684:
685: sub end_part {
686: my ($target,$token,$tagstack,$parstack,$parser,$safeeval)=@_;
687: &Apache::lonxml::debug("in end_part $target ");
688: my $status=$Apache::inputtags::status['-1'];
689: pop @Apache::inputtags::status;
690: if ( $target eq 'meta' ) { return ''; }
691: if ( $target eq 'grade' && $status eq 'CAN_ANSWER') {
692: return &Apache::inputtags::grade;
693: }
694: if ($target eq 'web' || $target eq 'tex' ) {
695: my $gradestatus=&Apache::inputtags::gradestatus($Apache::inputtags::part,$target);
696: if ($Apache::lonhomework::type eq 'exam') {$gradestatus='';}
697: return $gradestatus;
698: }
699: return '';
700: }
701:
702: sub start_preduedate {
703: my ($target,$token,$tagstack,$parstack,$parser,$safeeval)=@_;
704: if ($target eq 'web' || $target eq 'grade' || $target eq 'answer' || $target eq 'tex') {
705: if ($Apache::inputtags::status['-1'] ne 'CAN_ANSWER' &&
706: $Apache::inputtags::status['-1'] ne 'CANNOT_ANSWER' &&
707: $Apache::inputtags::status['-1'] ne 'SHOW_ANSWER') {
708: &Apache::lonxml::get_all_text("/preduedate",$$parser[$#$parser]);
709: }
710: }
711: return '';
712: }
713:
714: sub end_preduedate {
715: return '';
716: }
717:
718: sub start_postanswerdate {
719: my ($target,$token,$tagstack,$parstack,$parser,$safeeval)=@_;
720: if ($target eq 'web' || $target eq 'grade' || $target eq 'tex') {
721: if ($Apache::inputtags::status['-1'] ne 'SHOW_ANSWER') {
722: &Apache::lonxml::get_all_text("/postanswerdate",$$parser[$#$parser]);
723: }
724: } elsif ($target eq 'tex') {
725: return '\vskip 0 mm \noindent';
726: }
727: return '';
728: }
729:
730: sub end_postanswerdate {
731: return '';
732: }
733:
734: sub start_notsolved {
735: my ($target,$token,$tagstack,$parstack,$parser,$safeeval)=@_;
736: if ($target eq 'web' || $target eq 'grade' || $target eq 'answer' || $target eq 'tex') {
737: my $gradestatus=$Apache::lonhomework::history{"resource.$Apache::inputtags::part.solved"};
738: &Apache::lonxml::debug("not solved has :$gradestatus:");
739: if ($gradestatus =~ /^correct/) {
740: &Apache::lonxml::debug("skipping");
741: &Apache::lonxml::get_all_text("/notsolved",$$parser[$#$parser]);
742: }
743: }
744: return '';
745: }
746:
747: sub end_notsolved {
748: return '';
749: }
750:
751: sub start_solved {
752: my ($target,$token,$tagstack,$parstack,$parser,$safeeval)=@_;
753: if ($target eq 'web' || $target eq 'grade' || $target eq 'answer' || $target eq 'tex') {
754: my $gradestatus=$Apache::lonhomework::history{"resource.$Apache::inputtags::part.solved"};
755: if ($gradestatus !~ /^correct/) {
756: &Apache::lonxml::get_all_text("/solved",$$parser[$#$parser]);
757: }
758: }
759: return '';
760: }
761:
762: sub end_solved {
763: return '';
764: }
765:
766: sub start_startouttext {
767: my ($target,$token,$tagstack,$parstack,$parser,$safeeval)=@_;
768: my @result=(''.'');
769: if ($target eq 'edit' || $target eq 'modified' ) { @result=('','no'); }
770: return (@result);
771: }
772: sub end_startouttext {
773: my ($target,$token,$tagstack,$parstack,$parser,$safeeval)=@_;
774: my $result='';
775: my $text='';
776:
777: if ($target eq 'edit') {
778: $text=&Apache::lonxml::get_all_text("endouttext",$$parser[-1]);
779: $result.=&Apache::edit::start_table($token)."<tr><td>Text Block</td>
780: <td>Delete:".
781: &Apache::edit::deletelist($target,$token)
782: ."</td>
783: <td>".
784: &Apache::edit::insertlist($target,$token).
785: &Apache::edit::end_row().&Apache::edit::start_spanning_row()."\n".
786: &Apache::edit::editfield($token->[1],$text,"",80,4);
787: }
788: if ($target eq 'modified') {
789: $text=&Apache::lonxml::get_all_text("endouttext",$$parser['-1']);
790: $result='<startouttext />'.&Apache::edit::modifiedfield();
791: }
792: if ($target eq 'tex') {
793: $result .= '\noindent ';
794: }
795: return $result;
796: }
797: sub start_endouttext {
798: my ($target,$token,$tagstack,$parstack,$parser,$safeeval)=@_;
799: my $result='';
800: if ($target eq "edit" ) { $result="</td></tr>".&Apache::edit::end_table()."\n"; }
801: if ($target eq "modified") {
802: $result='<endouttext />'.
803: &Apache::edit::handle_insertafter('startouttext'); }
804: return $result;
805: }
806: sub end_endouttext {
807: my ($target,$token,$tagstack,$parstack,$parser,$safeeval)=@_;
808: my @result=('','');
809: if ($target eq "edit" || $target eq 'modified') { @result=('','no'); }
810: return (@result);
811: }
812: sub delete_startouttext {
813: my ($target,$token,$tagstack,$parstack,$parser,$safeeval)=@_;
814: # my $text=&Apache::lonxml::get_all_text("endouttext",$$parser['-1']);
815: my $text=$$parser['-1']->get_text("/endouttext");
816: my $ntoken=$$parser['-1']->get_token();
817: &Apache::lonxml::debug("Deleting :$text: and :$ntoken->[0]:$ntoken->[1]:$ntoken->[2]: for startouttext");
818: &Apache::lonxml::end_tag($tagstack,$parstack,$ntoken);
819: # Deleting 2 parallel tag pairs, but we need the numbers later to look like
820: # they did the last time round
821: &Apache::lonxml::increasedepth($ntoken);
822: &Apache::lonxml::decreasedepth($ntoken);
823: return 1;
824: }
825:
826: 1;
827: __END__
FreeBSD-CVSweb <freebsd-cvsweb@FreeBSD.org>
![[BACK]](/icons/back.gif){kind=icon}
Return to structuretags.pm CVS log ![[TXT]](/icons/text.gif){kind=icon}
![[DIR]](/icons/dir.gif){kind=icon}
Up to [LON-CAPA] / loncom / homework