1: # The LearningOnline Network with CAPA
2: # definition of tags that give a structure to a document
3: #
4: # $Id: structuretags.pm,v 1.159 2003/04/03 14:31:58 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:
33: package Apache::structuretags;
34:
35: use strict;
36: use Apache::lonnet;
37: use Apache::File();
38: use Apache::lonmenu;
39:
40: BEGIN {
41: &Apache::lonxml::register('Apache::structuretags',('block','while','randomlist','problem','library','web','tex','part','preduedate','postanswerdate','solved','notsolved','startouttext','endouttext'));
42: }
43:
44: sub start_web {
45: my ($target,$token,$tagstack,$parstack,$parser,$safeeval)=@_;
46: my $bodytext=&Apache::lonxml::get_all_text("/web",$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);
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,
83: $parstack,$parser,$safeeval);
84: $head_tag_start='<head>'.&Apache::lonmenu::registerurl(undef,$target);
85: }
86: my $body_tag_start;
87: if (!defined($found{'body'})) {
88: $body_tag_start='<body onLoad="'.&Apache::lonmenu::loadevents().'" '.
89: 'onUnload="'.&Apache::lonmenu::unloadevents().'" ';
90: my $background=&Apache::lonxml::get_param('background',$parstack,
91: $safeeval);
92: if ($background) {
93: $Apache::lonxml::extlinks[$#Apache::lonxml::extlinks+1]=
94: $background;
95: $body_tag_start.='background="'.$background.'" ';
96: } else {
97: my $bgcolor=&Apache::lonxml::get_param('bgcolor',$parstack,
98: $safeeval);
99: if ($bgcolor) {
100: $body_tag_start.='bgcolor="'.$bgcolor.'" ';
101: } else {
102: $body_tag_start.='bgcolor="#ffffff"';
103: }
104: }
105: $body_tag_start.='>'.&Apache::lonmenu::menubuttons(undef,$target,1);
106: if ($target eq 'web' && $ENV{'request.state'} ne 'construct') {
107: my ($symb)=&Apache::lonxml::whichuser();
108: if ($symb eq '') {
109: my $help = &Apache::loncommon::help_open_topic("Ambiguous_Reference");
110: $help="Browsing or <a href=\"/adm/ambiguous\">ambiguous</a> reference, submissions ignored $help<br />";
111: $body_tag_start.=$help;
112: }
113: }
114: }
115: my $form_tag_start;
116: if (!defined($found{'form'})) {
117: $form_tag_start='<form name="lonhomework" method="POST" action="'.
118: $ENV{'request.uri'}.'">';
119: }
120: return ($result,$head_tag_start,$body_tag_start,$form_tag_start);
121: }
122:
123: #use Time::HiRes();
124: sub get_resource_name {
125: my ($parstack,$safeeval)=@_;
126: my $name=&Apache::lonnet::gettitle();
127: if ($name eq '') {
128: $name=&Apache::lonnet::EXT('resource.title');
129: if ($name eq 'con_lost') { $name = ''; }
130: }
131: $Apache::lonhomework::name=$name;
132: return $name;
133: }
134:
135: sub setup_rndseed {
136: my ($safeeval)=@_;
137: my $rndseed;
138: if ($ENV{'request.state'} eq "construct") {
139: $rndseed=$ENV{'form.rndseed'};
140: if (!$rndseed) {
141: $rndseed=time;
142: $ENV{'form.rndseed'}=$rndseed;
143: }
144: &Apache::lonxml::debug("Setting rndseed to $rndseed");
145: &Apache::run::run('$external::randomseed='.$rndseed.';',$safeeval);
146: }
147: return $rndseed;
148: }
149:
150: sub problem_edit_header {
151: return '<input type="hidden" name="submitted" value="edit" />
152: <input type="hidden" name="problemmode" value="Edit" />
153: <input type="submit" name="problemmode" value="Discard Edits and View" />
154: <input type="submit" name="problemmode" value="EditXML" />
155: <input type="submit" name="Undo" value="undo" /> <hr />
156: <input type="submit" name="submit" value="Submit Changes and Edit" />
157: <input type="submit" name="submit" value="Submit Changes and View" /><br /><p> </p><table border="0"><tr><td bgcolor="#DDDDDD">
158: ';
159: }
160:
161: sub problem_edit_footer {
162: return '</td></tr></table><br /><input type="submit" name="submit" value="Submit Changes and Edit" />
163: <input type="submit" name="submit" value="Submit Changes and View" />';
164: }
165:
166: sub problem_web_to_edit_header {
167: my ($rndseed)=@_;
168: my $result.='<input type="hidden" name="problemmode" value="View" />
169: <input type="submit" name="problemmode" value="Edit" />
170: <input type="submit" name="problemmode" value="EditXML" />
171: Random Seed:<input type="text" name="rndseed" width="10" value="'.
172: $rndseed.'" />
173: <input type="submit" name="changerandseed" value="Change" />
174: <input type="submit" name="resetdata" value="Reset Submissions" />
175: <input type="checkbox" name="showallfoils" ';
176: if (defined($ENV{'form.showallfoils'})) { $result.='checked="on"'; }
177: $result.= ' /> Show All Foils
178: <hr />';
179: my $numtoanalyze=$ENV{'form.numtoanalyze'};
180: if (!$numtoanalyze) { $numtoanalyze=100; }
181: $result.= '<input type="submit" name="problemmode" value="Answer Distribution" />
182: <input type="text" name="numtoanalyze" value="'.
183: $numtoanalyze.'" size="5" /> <hr />';
184: return $result;
185: }
186:
187: sub initialize_storage {
188: %Apache::lonhomework::results=();
189: my ($symb,$courseid,$domain,$name) = &Apache::lonxml::whichuser();
190: if ($ENV{'request.state'} eq 'construct') {
191: %Apache::lonhomework::history=
192: &Apache::lonnet::tmprestore($ENV{'request.uri'},'',$domain,$name);
193: my ($temp)=keys %Apache::lonhomework::history ;
194: &Apache::lonxml::debug("Return message of $temp");
195: } else {
196: %Apache::lonhomework::history=
197: &Apache::lonnet::restore($symb,$courseid,$domain,$name);
198: }
199: #ignore error conditions
200: my ($temp)=keys %Apache::lonhomework::history ;
201: if ($temp =~ m/^error:.*/) { %Apache::lonhomework::history=(); }
202: }
203:
204: # -------------------------------------------------------------finalize_storage
205: # Stores away the result has to a student's environment
206: # checks form.grade_ for specific values, other wises stores
207: # to the running users environment
208: sub finalize_storage {
209: my $result;
210: my ($temp) = keys %Apache::lonhomework::results;
211: if ( $temp ne '' ) {
212: my ($symb,$courseid,$domain,$name) = &Apache::lonxml::whichuser();
213: if ($ENV{'request.state'} eq 'construct') {
214: $result=&Apache::lonnet::tmpstore(\%Apache::lonhomework::results,
215: $ENV{'request.uri'},'',$domain,$name);
216: &Apache::lonxml::debug('Construct Store return message:'.$result);
217: } else {
218: $result=&Apache::lonnet::cstore(\%Apache::lonhomework::results,
219: $symb,$courseid,$domain,$name);
220: &Apache::lonxml::debug('Store return message:'.$result);
221: }
222: }
223: return $result;
224: }
225:
226: sub checkout_msg {
227: return (<<ENDCHECKOUT);
228: <h2>The resource needs to be checked out</h2>
229: As a resource gets checked out, a unique timestamped ID is given to it, and a
230: permanent record is left in the system.<p />
231: <font color=red>
232: Checking out resources is subject to course policies, and may exclude future
233: credit even if done erroneously.<p />
234: </font>
235: <form name="checkout" method="POST" action="$ENV{'request.uri'}">
236: <input type="hidden" name="doescheckout" value="yes" />
237: <input type="button" name="checkoutbutton" value="Check out Exam for Viewing" onClick="javascript:if (confirm('Check out Exam?')) { document.checkout.submit(); }" />
238: </form>
239: ENDCHECKOUT
240: }
241:
242: sub start_problem {
243: my ($target,$token,$tagstack,$parstack,$parser,$safeeval)=@_;
244:
245: $Apache::lonhomework::parsing_a_problem=1;
246: # meta is called from lonpublisher, which doesn't uses the normal
247: # lonhomework method of parsing the file which means that inputtags
248: # won't get reset
249: if ( $Apache::inputtags::part ne '' && $target != 'meta' ) {
250: &Apache::lonxml::error('Only one problem allowed in a .problem file');
251: my $bodytext=&Apache::lonxml::get_all_text("/problem",$parser);
252: return '';
253: }
254: #intialize globals
255: $Apache::inputtags::part='0';
256: @Apache::inputtags::responselist = ();
257: @Apache::inputtags::previous=();
258: @Apache::inputtags::previous_version=();
259: $Apache::structuretags::printanswer='No';
260: if ($target ne 'analyze') {
261: &initialize_storage();
262: if ($target eq 'web') {
263: &Apache::lonhomework::showhash(%Apache::lonhomework::history);
264: }
265: $Apache::lonhomework::type=&Apache::lonnet::EXT('resource.0.type');
266: &Apache::lonxml::debug("Found this to be of type :$Apache::lonhomework::type:");
267: }
268: if ($Apache::lonhomework::type eq '') {
269: my $uri=$ENV{'request.uri'};
270: if ($uri=~/\.(\w+)$/) {
271: $Apache::lonhomework::type=$1;
272: &Apache::lonxml::debug("Using type of $1");
273: } else {
274: $Apache::lonhomework::type='problem';
275: &Apache::lonxml::debug("Using default type, problem, :$uri:");
276: }
277: }
278:
279: #added vars to the scripting enviroment
280: my $expression='$external::part='.$Apache::inputtags::part.';';
281: &Apache::run::run($expression,$safeeval);
282: my $status;
283: my $accessmsg;
284:
285: #should get back a <html> or the neccesary stuff to start XML/MathML
286: my ($result,$head_tag_start,$body_tag_start,$form_tag_start)=
287: &page_start($target,$token,$tagstack,$parstack,$parser,$safeeval);
288: if ($target eq 'tex' and $ENV{'request.symb'} =~ m/\.page_/) {$result='';}
289:
290: if ($target eq 'analyze') { my $rndseed=&setup_rndseed($safeeval); }
291: if ($target eq 'web' || $target eq 'grade' || $target eq 'answer' ||
292: $target eq 'tex') {
293: #handle exam checkout
294: if ($Apache::lonhomework::type eq 'exam') {
295: my $token=
296: $Apache::lonhomework::history{"resource.0.outtoken"};
297: if (($ENV{'form.doescheckout'}) && (!$token)) {
298: $token=&Apache::lonxml::maketoken();
299: $Apache::lonhomework::history{"resource.0.outtoken"}=
300: $token;
301: }
302: $body_tag_start.=&Apache::lonxml::printtokenheader($target,$token);
303: }
304:
305: #handle rand seed in construction space
306: my $rndseed=&setup_rndseed($safeeval);
307: ($status,$accessmsg) = &Apache::lonhomework::check_access('0');
308: push (@Apache::inputtags::status,$status);
309: my $expression='$external::datestatus="'.$status.'";';
310: $expression.='$external::gradestatus="'.$Apache::lonhomework::history{"resource.0.solved"}.'";';
311: &Apache::run::run($expression,$safeeval);
312: &Apache::lonxml::debug("Got $status");
313: if (( $status eq 'CLOSED' ) ||
314: ( $status eq 'UNCHECKEDOUT') ||
315: ( $status eq 'BANNED') ||
316: ( $status eq 'UNAVAILABLE')) {
317: my $bodytext=&Apache::lonxml::get_all_text("/problem",$parser);
318: if ( $target eq "web" ) {
319: $result.= $head_tag_start.'</head>';
320: my $msg=$body_tag_start;
321: if ($status eq 'UNAVAILABLE') {
322: $result.='<h1>Unable to determine if this resource is open due to network problems. Please try again later.</h1>';
323: } else {
324: $result.='<h1>Not open to be viewed</h1>';
325: }
326: if ($status eq 'CLOSED') {
327: $msg.='The problem '.$accessmsg;
328: } elsif ($status eq 'UNCHECKEDOUT') {
329: $msg.=&checkout_msg;
330: }
331: $result.=$msg.'<br />';
332: } elsif ($target eq 'tex') {
333: $result.='\begin{document}\noindent \vskip 1 mm \begin{minipage}{\textwidth}\vskip 0 mm';
334: if ($status eq 'UNAVAILABLE') {
335: $result.='Unable to determine if this resource is open due to network problems. Please try again later.\vskip 0 mm ';
336: } else {
337: $result.="Problem is not open to be viewed. It $accessmsg \\vskip 0 mm ";
338: }
339: }
340: } elsif ($target eq 'web') {
341: my $name= &get_resource_name($parstack,$safeeval);
342: if ($status eq 'CAN_ANSWER') {
343: # create a page header and exit
344: $result.="$head_tag_start<title>$name</title></head>
345: $body_tag_start \n $form_tag_start".
346: '<input type="hidden" name="submitted" value="yes" />';
347: if ($ENV{'request.state'} eq "construct") {
348: $result.= &problem_web_to_edit_header($rndseed);
349: }
350: # if we are viewing someone else preserve that info
351: if (defined $ENV{'form.grade_symb'}) {
352: foreach my $field ('symb','courseid','domain','username') {
353: $result .= '<input type="hidden" name="grade_'.$field.
354: '" value="'.$ENV{"form.grade_$field"}.'" />'."\n";
355: }
356: }
357: } elsif ($status eq 'SHOW_ANSWER' || $status eq 'CANNOT_ANSWER'
358: || $status eq 'CLOSED' || $status eq 'UNAVALAILABLE') {
359: $result.=$head_tag_start.
360: "<title>$name</title></head>\n$body_tag_start\n";
361: }
362: } elsif ($target eq 'tex') {
363: my $name= &Apache::lonxml::get_param('name',$parstack,$safeeval);
364: if ($name eq '') {
365: $name=&Apache::lonnet::EXT('resource.title');
366: if ($name eq 'con_lost') { $name = ''; }
367: }
368: $Apache::lonhomework::name=$name;
369: my $id = $Apache::inputtags::part;
370: my $weight = &Apache::lonnet::EXT("resource.$id.weight");
371: my $allkeys=&Apache::lonnet::metadata($ENV{'request.uri'},'keys');
372: my @allkeys = split /,/,$allkeys;
373: my $allow_print_points = 0;
374: foreach my $partial_key (@allkeys) {
375: if ($partial_key=~m/weight/) {
376: $allow_print_points++;
377: }
378: }
379: my $duedate = &Apache::lonnet::EXT("resource.$id.duedate");
380: $duedate = POSIX::strftime("%c",localtime($duedate));
381: my $temp_file;
382: my $filename = "/home/httpd/prtspool/$ENV{'user.name'}_$ENV{'user.domain'}_printout.due";
383: if (-e $filename) {
384: $temp_file = Apache::File->new($filename);
385: } else {
386: $temp_file = Apache::File->new('>>'.$filename);
387: }
388: my @due_file_content = <$temp_file>;
389: my $due_file_content = $due_file_content[$#due_file_content];
390: chomp $due_file_content;
391: my $name_of_resourse= &get_resource_name($parstack,$safeeval);
392: if ($due_file_content ne $duedate) {
393: $temp_file = Apache::File->new('>'.$filename);
394: print $temp_file "$duedate\n";
395: if (not $ENV{'request.symb'} =~ m/\.page_/) {
396: if(not $duedate=~m/1969/ and $Apache::lonhomework::type ne 'exam') {
397: $result .= '\begin{document} \typeout{STAMPOFPASSEDRESOURCESTART Resource <h2>"'.$name_of_resourse.'"</h2> located in <br /><small><b>'.$ENV{'request.uri'}.'</b></small><br /> STAMPOFPASSEDRESOURCEEND} \noindent\textit{Due date: '.$duedate.'} \vskip 1 mm\noindent \begin{minipage}{\textwidth}';
398: } else {
399: $result .= '\begin{document} \typeout{STAMPOFPASSEDRESOURCESTART Resource <h2>"'.$name_of_resourse.'"</h2> located in <br /><small><b>'.$ENV{'request.uri'}.'</b></small><br /> STAMPOFPASSEDRESOURCEEND} \noindent \vskip 1 mm \noindent\begin{minipage}{\textwidth}';
400: if ($Apache::lonhomework::type eq 'exam' and $allow_print_points==1) { $result .= '\fbox{\textit{'.$weight.' pt}}';}
401: }
402: } else {
403: $result .= '\vskip 1mm\textit{Due date: '.$duedate.'} \\\\\\\\';
404: }
405: } else {
406: if (not $ENV{'request.symb'} =~ m/\.page_/) {
407: $result .= '\begin{document} \typeout{STAMPOFPASSEDRESOURCESTART Resource <h2>"'.$name_of_resourse.'"</h2> located in <br /><small><b>'.$ENV{'request.uri'}.'</b></small><br /> STAMPOFPASSEDRESOURCEEND} \noindent \vskip 1 mm\noindent\begin{minipage}{\textwidth}';
408: if (($Apache::lonhomework::type eq 'exam') and ($allow_print_points==1)) { $result .= '\fbox{\textit{'.$weight.' pt}}';}
409: } else {
410: $result .= '\vskip 1mm \\\\\\\\';
411: }
412: }
413: }
414: } elsif ($target eq 'edit') {
415: $result.=$head_tag_start."</head>".$body_tag_start.$form_tag_start.
416: &problem_edit_header();
417: my $temp=&Apache::edit::insertlist($target,$token);
418: $result.=$temp;
419: } elsif ($target eq 'modified') {
420: $result=$token->[4];
421: $result.=&Apache::edit::handle_insert();
422: } else {
423: # page_start returned a starting result, delete it if we don't need it
424: $result = '';
425: }
426: return $result;
427: }
428:
429: sub end_problem {
430: my ($target,$token,$tagstack,$parstack,$parser,$safeeval)=@_;
431: my $result='';
432: my $status=$Apache::inputtags::status['-1'];
433: if ($target eq 'grade' || $target eq 'web' || $target eq 'answer' ||
434: $target eq 'tex') {
435: if ( $target eq 'grade' && $Apache::inputtags::part eq '0' &&
436: $status eq 'CAN_ANSWER' ) {
437: # if part is zero, no <part>s existed, so we need to the grading
438: &Apache::inputtags::grade;
439: } elsif ( ($target eq 'web' || $target eq 'tex') &&
440: $Apache::inputtags::part eq '0' &&
441: $status ne 'UNCHECKEDOUT') {
442: # if part is zero, no <part>s existed, so we need show the current
443: # grading status
444: my $gradestatus = &Apache::inputtags::gradestatus($Apache::inputtags::part,$target);
445: $result.= $gradestatus;
446: }
447: if (
448: (($target eq 'web') && ($ENV{'request.state'} ne 'construct')) ||
449: ($target eq 'answer') || ($target eq 'tex')
450: ) {
451: if ($status eq 'CAN_ANSWER') {
452: if ($target ne 'tex') {
453: $result.="</form></body>\n";
454: }
455: } elsif ($status eq 'SHOW_ANSWER' || $status eq 'CANNOT_ANSWER' ||
456: $status eq 'UNCHECKEDOUT' ) {
457: if ($target ne 'tex') {
458: $result.="</body>\n";
459: }
460: }
461: if ($target eq 'web') {
462: $result.=&Apache::lonxml::xmlend();
463: } elsif ($target eq 'tex') {
464: $result .= '\vskip 0.5mm\noindent\makebox[\textwidth/$number_of_columns][b]{\hrulefill}';
465: if (not $ENV{'request.symb'} =~ m/\.page_/) {
466: $result .= '\end{minipage}\end{document} ';
467: } else {
468: $result .= '';
469: }
470: }
471: }
472: if ($target eq 'grade') {
473: &Apache::lonhomework::showhash(%Apache::lonhomework::results);
474: &finalize_storage();
475: }
476: if ($target eq 'answer' && ($ENV{'request.state'} eq 'construct') ) {
477: $result.='</html>'; #normally we get it from xmlend, but in CSTR
478: # we always show answer mode too.
479: }
480: } elsif ($target eq 'meta') {
481: if ($Apache::inputtags::part eq '0') {
482: $result=&Apache::response::mandatory_part_meta;
483: }
484: } elsif ($target eq 'edit') {
485: &Apache::lonxml::debug("in end_problem with $target, edit");
486: $result = &problem_edit_footer();
487: }
488:
489: undef(%Apache::lonhomework::history);
490: undef(%Apache::lonhomework::results);
491: undef($Apache::inputtags::part);
492: undef($Apache::lonhomework::parsing_a_problem);
493:
494: return $result;
495: }
496:
497:
498: sub start_library {
499: my ($target,$token,$tagstack,$parstack,$parser,$safeeval)=@_;
500: my ($result,$head_tag_start,$body_tag_start,$form_tag_start);
501:
502: if ($target eq 'edit') {
503: ($result,$head_tag_start,$body_tag_start,$form_tag_start)=
504: &page_start($target,$token,$tagstack,$parstack,$parser,$safeeval);
505: $result.=$head_tag_start."</head>".$body_tag_start.$form_tag_start.
506: &problem_edit_header();
507: my $temp=&Apache::edit::insertlist($target,$token);
508: $result.=$temp;
509: } elsif ($target eq 'modified') {
510: $result=$token->[4];
511: $result.=&Apache::edit::handle_insert();
512: } elsif ($target eq 'web' && $$tagstack[0] ne 'problem' &&
513: $ENV{'request.state'} eq "construct" ) {
514: ($result,$head_tag_start,$body_tag_start,$form_tag_start)=
515: &page_start($target,$token,$tagstack,$parstack,$parser,$safeeval);
516: my $name=&get_resource_name($parstack,$safeeval);
517: my $rndseed=&setup_rndseed($safeeval);
518: $result.="$head_tag_start<title>$name</title></head>
519: $body_tag_start \n $form_tag_start".
520: '<input type="hidden" name="submitted" value="yes" />';
521: $result.=&problem_web_to_edit_header($rndseed);
522: }
523: return $result;
524: }
525:
526: sub end_library {
527: my ($target,$token,$tagstack,$parstack,$parser,$safeeval)=@_;
528: my $result='';
529: if ($target eq 'edit') {
530: $result=&problem_edit_footer();
531: } elsif ($target eq 'web' && $$tagstack[0] ne 'problem' &&
532: $ENV{'request.state'} eq "construct") {
533: $result.='</form></body>'.&Apache::lonxml::xmlend();
534: }
535: return $result;
536: }
537:
538: sub start_block {
539: my ($target,$token,$tagstack,$parstack,$parser,$safeeval)=@_;
540:
541: my $result;
542:
543: if ($target eq 'web' || $target eq 'grade' || $target eq 'answer' ||
544: $target eq 'tex' || $target eq 'analyze') {
545: my $code = $token->[2]->{'condition'};
546: if ($code) {
547: if (!$Apache::lonxml::default_homework_loaded) {
548: &Apache::lonxml::default_homework_load($safeeval);
549: }
550: $result = &Apache::run::run($code,$safeeval);
551: &Apache::lonxml::debug("block :$code: returned :$result:");
552: } else {
553: $result='1';
554: }
555: if ( ! $result ) {
556: my $skip=&Apache::lonxml::get_all_text("/block",$parser);
557: &Apache::lonxml::debug("skipping ahead :$skip: $$parser[-1]");
558: }
559: $result='';
560: } elsif ($target eq 'edit') {
561: $result .=&Apache::edit::tag_start($target,$token);
562: $result .=&Apache::edit::text_arg('Test Condition:','condition',
563: $token,40);
564: $result .=&Apache::edit::end_row().&Apache::edit::start_spanning_row();
565: } elsif ($target eq 'modified') {
566: my $constructtag=&Apache::edit::get_new_args($token,$parstack,
567: $safeeval,'condition');
568: if ($constructtag) { $result = &Apache::edit::rebuild_tag($token); }
569: }
570: return $result;
571: }
572:
573: sub end_block {
574: my ($target,$token,$tagstack,$parstack,$parser,$safeeval)=@_;
575: my @result=('','');
576: if ($target eq "edit" || $target eq 'modified') { @result=('','no'); }
577: return (@result);
578: }
579:
580: sub start_while {
581: my ($target,$token,$tagstack,$parstack,$parser,$safeeval)=@_;
582:
583: my $code = $token->[2]->{'condition'};
584:
585: push( @Apache::structuretags::whileconds, $code);
586: if (!$Apache::lonxml::default_homework_loaded) {
587: &Apache::lonxml::default_homework_load($safeeval);
588: }
589: my $result = &Apache::run::run($code,$safeeval);
590: my $bodytext=$$parser[$#$parser]->get_text("/while");
591: push( @Apache::structuretags::whilebody, $bodytext);
592: if ( $result ) {
593: &Apache::lonxml::newparser($parser,\$bodytext);
594: }
595: return "";
596: }
597:
598: sub end_while {
599: my ($target,$token,$tagstack,$parstack,$parser,$safeeval)=@_;
600: my $code = pop @Apache::structuretags::whileconds;
601: my $bodytext = pop @Apache::structuretags::whilebody;
602: my $result = &Apache::run::run($code,$safeeval);
603: if ( $result ) {
604: &Apache::lonxml::newparser($parser,\$bodytext);
605: }
606: return "";
607: }
608:
609: # <randomlist show="1">
610: # <tag1>..</tag1>
611: # <tag2>..</tag2>
612: # <tag3>..</tag3>
613: # ...
614: # </randomlist>
615: sub start_randomlist {
616: my ($target,$token,$tagstack,$parstack,$parser,$safeeval)=@_;
617: my $result;
618: if ($target eq 'answer' || $target eq 'grade' || $target eq 'web' ||
619: $target eq 'tex' || $target eq 'analyze') {
620: my $body= &Apache::lonxml::get_all_text("/randomlist",$parser);
621: my $b_parser= HTML::TokeParser->new(\$body);
622: my $b_tok;
623: my @randomlist;
624: my $list_item;
625: while($b_tok = $b_parser->get_token() ) {
626: if($b_tok->[0] eq 'S') { # start tag
627: # get content of the tag until matching end tag
628: # get all text upto the matching tag
629: # and push the content into @randomlist
630: $list_item = &Apache::lonxml::get_all_text('/'.$b_tok->[1],
631: $b_parser);
632: $list_item = "$b_tok->[4]"."$list_item"."</$b_tok->[1]>";
633: push(@randomlist,$list_item);
634: # print "<br /><b>START-TAG $b_tok->[1], $b_tok->[4],
635: # $list_item</b>";
636: }
637: if($b_tok->[0] eq 'T') { # text
638: # what to do with text in between tags?
639: # print "<b>TEXT $b_tok->[1]</b><br />";
640: }
641: # if($b_tok->[0] eq 'E') { # end tag, should not happen
642: # print "<b>END-TAG $b_tok->[1]</b><br />";
643: # }
644: }
645: my @idx_arr = (0 .. $#randomlist);
646: &Apache::structuretags::shuffle(\@idx_arr);
647: my $bodytext = '';
648: my $show=$#randomlist;
649: my $showarg=&Apache::lonxml::get_param('show',$parstack,$safeeval);
650: $showarg--;
651: if ( ($showarg >= 0) && ($showarg < $show) ) { $show = $showarg; }
652: for(0 .. $show) {
653: $bodytext .= "$randomlist[ $idx_arr[$_] ]";
654: }
655: &Apache::lonxml::newparser($parser,\$bodytext);
656: } elsif ($target eq 'edit' ) {
657: $result .=&Apache::edit::tag_start($target,$token);
658: $result .=&Apache::edit::text_arg('Maximum Tags to Show:','show',
659: $token,5);
660: $result .=&Apache::edit::end_row().&Apache::edit::start_spanning_row();
661: } elsif ($target eq 'modified' ) {
662: my $constructtag=&Apache::edit::get_new_args($token,$parstack,
663: $safeeval,'show');
664: if ($constructtag) { $result = &Apache::edit::rebuild_tag($token); }
665: }
666: return $result;
667: }
668:
669: sub shuffle {
670: my $a=shift;
671: my $i;
672: if (defined(@$a)) {
673: &Apache::response::setrandomnumber();
674: for($i=@$a;--$i;) {
675: my $j=int(&Math::Random::random_uniform() * ($i+1));
676: next if $i == $j;
677: @$a[$i,$j] = @$a[$j,$i];
678: }
679: }
680: }
681:
682: sub end_randomlist {
683: my ($target,$token,$tagstack,$parstack,$parser,$safeeval)=@_;
684: my $result;
685: if ($target eq 'edit' ) {
686: $result=&Apache::edit::tag_end($target,$token,
687: 'End Randomly Parsed Block');
688: }
689: return $result;
690: }
691:
692: sub start_part {
693: my ($target,$token,$tagstack,$parstack,$parser,$safeeval)=@_;
694: my $result='';
695: my $id= &Apache::lonxml::get_param('id',$parstack,$safeeval);
696: if ($id eq '') { $id = $Apache::lonxml::curdepth; }
697: $Apache::inputtags::part=$id;
698: @Apache::inputtags::responselist = ();
699: @Apache::inputtags::previous=();
700: @Apache::inputtags::previous_version=();
701: my $hidden=&Apache::loncommon::check_if_partid_hidden($Apache::inputtags::part);
702:
703: if ($target eq 'meta') {
704: return &Apache::response::mandatory_part_meta;
705: } elsif ($target eq 'web' || $target eq 'grade' ||
706: $target eq 'answer' || $target eq 'tex') {
707: if ($hidden) {
708: my $bodytext=&Apache::lonxml::get_all_text("/part",$parser);
709: } else {
710: my ($status,$accessmsg) = &Apache::lonhomework::check_access($id);
711: push (@Apache::inputtags::status,$status);
712: my $expression='$external::datestatus="'.$status.'";';
713: $expression.='$external::gradestatus="'.$Apache::lonhomework::history{"resource.$id.solved"}.'";';
714: &Apache::run::run($expression,$safeeval);
715: if ( $status eq 'CLOSED' ) {
716: my $bodytext=&Apache::lonxml::get_all_text("/part",$parser);
717: if ( $target eq "web" ) {
718: $result="<br />Part is not open to be viewed. It $accessmsg<br />";
719: } elsif ( $target eq 'tex' ) {
720: $result="\\end{minipage}\\vskip 0 mm Part is not open to be viewed. It $accessmsg \\\\\\begin{minipage}{\\textwidth}";
721: }
722: } else {
723: if ($target eq 'tex') {
724: $result.='\noindent \end{minipage}\vskip 0 mm \noindent \begin{minipage}{\textwidth}\noindent';
725: my $weight = &Apache::lonnet::EXT("resource.$id.weight");
726: if ($Apache::lonhomework::type eq 'exam') { $result .= '\fbox{\textit{'.$weight.' pt}}';}
727: }
728: }
729: }
730: } elsif ($target eq 'edit') {
731: $result.=&Apache::edit::tag_start($target,$token);
732: $result.=&Apache::edit::text_arg('Part ID:','id',$token).
733: &Apache::loncommon::help_open_topic("Part_Tag_Edit_Help").
734: &Apache::edit::end_row().&Apache::edit::start_spanning_row();
735: } elsif ($target eq 'modified') {
736: my $constructtag=&Apache::edit::get_new_args($token,$parstack,
737: $safeeval,'id');
738: if ($constructtag) {
739: $result = &Apache::edit::rebuild_tag($token);
740: $result.=&Apache::edit::handle_insert();
741: }
742: }
743: return $result;
744: }
745:
746: sub end_part {
747: my ($target,$token,$tagstack,$parstack,$parser,$safeeval)=@_;
748: &Apache::lonxml::debug("in end_part $target ");
749: my $status=$Apache::inputtags::status['-1'];
750: my $hidden=&Apache::loncommon::check_if_partid_hidden($Apache::inputtags::part);
751: my $result='';
752: if ( $target eq 'meta' ) {
753: $result='';
754: } elsif ( $target eq 'grade' && $status eq 'CAN_ANSWER' && !$hidden) {
755: $result=&Apache::inputtags::grade;
756: } elsif (($target eq 'web' || $target eq 'tex') && !$hidden ) {
757: my $gradestatus=&Apache::inputtags::gradestatus($Apache::inputtags::part,
758: $target);
759: if ($Apache::lonhomework::type eq 'exam') {$gradestatus='';}
760: $result=$gradestatus;
761: }
762: pop @Apache::inputtags::status;
763: $Apache::inputtags::part='';
764: return $result;
765: }
766:
767: sub start_preduedate {
768: my ($target,$token,$tagstack,$parstack,$parser,$safeeval)=@_;
769: if ($target eq 'web' || $target eq 'grade' || $target eq 'answer' || $target eq 'tex') {
770: if ($Apache::inputtags::status['-1'] ne 'CAN_ANSWER' &&
771: $Apache::inputtags::status['-1'] ne 'CANNOT_ANSWER' &&
772: $Apache::inputtags::status['-1'] ne 'SHOW_ANSWER') {
773: &Apache::lonxml::get_all_text("/preduedate",$parser);
774: }
775: }
776: return '';
777: }
778:
779: sub end_preduedate {
780: return '';
781: }
782:
783: sub start_postanswerdate {
784: my ($target,$token,$tagstack,$parstack,$parser,$safeeval)=@_;
785: if ($target eq 'web' || $target eq 'grade' || $target eq 'tex') {
786: if ($Apache::inputtags::status['-1'] ne 'SHOW_ANSWER') {
787: &Apache::lonxml::get_all_text("/postanswerdate",$parser);
788: }
789: } elsif ($target eq 'tex') {
790: return '\vskip 0 mm \noindent';
791: }
792: return '';
793: }
794:
795: sub end_postanswerdate {
796: return '';
797: }
798:
799: sub start_notsolved {
800: my ($target,$token,$tagstack,$parstack,$parser,$safeeval)=@_;
801: if ($target eq 'web' || $target eq 'grade' || $target eq 'answer' ||
802: $target eq 'tex') {
803: my $gradestatus=$Apache::lonhomework::history{"resource.$Apache::inputtags::part.solved"};
804: &Apache::lonxml::debug("not solved has :$gradestatus:");
805: if ($gradestatus =~ /^correct/) {
806: &Apache::lonxml::debug("skipping");
807: &Apache::lonxml::get_all_text("/notsolved",$parser);
808: }
809: }
810: return '';
811: }
812:
813: sub end_notsolved {
814: return '';
815: }
816:
817: sub start_solved {
818: my ($target,$token,$tagstack,$parstack,$parser,$safeeval)=@_;
819: if ($target eq 'web' || $target eq 'grade' || $target eq 'answer' ||
820: $target eq 'tex') {
821: my $gradestatus=$Apache::lonhomework::history{"resource.$Apache::inputtags::part.solved"};
822: if ($gradestatus !~ /^correct/) {
823: &Apache::lonxml::get_all_text("/solved",$parser);
824: }
825: }
826: return '';
827: }
828:
829: sub end_solved {
830: return '';
831: }
832:
833: sub start_startouttext {
834: my ($target,$token,$tagstack,$parstack,$parser,$safeeval)=@_;
835: my @result=(''.'');
836: if ($target eq 'edit' || $target eq 'modified' ) { @result=('','no'); }
837: return (@result);
838: }
839:
840: sub end_startouttext {
841: my ($target,$token,$tagstack,$parstack,$parser,$safeeval)=@_;
842: my $result='';
843: my $text='';
844:
845: if ($target eq 'edit') {
846: $text=&Apache::lonxml::get_all_text("endouttext",$parser);
847: $result.=&Apache::edit::start_table($token)."<tr><td>Text Block</td>
848: <td>Delete:".
849: &Apache::edit::deletelist($target,$token)
850: ."</td>
851: <td>".
852: &Apache::edit::insertlist($target,$token).
853: &Apache::edit::end_row().
854: &Apache::edit::start_spanning_row()."\n"
855: .'<table><tr><td>'.
856: &Apache::loncommon::help_open_topic("Greek_Symbols",
857: 'Greek Symbols',
858: undef,undef,600)
859: .'</td><td>'.
860: &Apache::loncommon::help_open_topic("Other_Symbols",
861: 'Other Symbols',
862: undef,undef,600)
863: .'</td></tr></table>'.
864: &Apache::edit::editfield($token->[1],$text,"",80,4);
865: }
866: if ($target eq 'modified') {
867: $text=&Apache::lonxml::get_all_text("endouttext",$parser);
868: $result='<startouttext />'.&Apache::edit::modifiedfield();
869: }
870: if ($target eq 'tex') {
871: $result .= '\noindent ';
872: }
873: return $result;
874: }
875:
876: sub start_endouttext {
877: my ($target,$token,$tagstack,$parstack,$parser,$safeeval)=@_;
878: my $result='';
879: if ($target eq "edit" ) { $result="</td></tr>".&Apache::edit::end_table()."\n"; }
880: if ($target eq "modified") {
881: $result='<endouttext />'.
882: &Apache::edit::handle_insertafter('startouttext'); }
883: return $result;
884: }
885:
886: sub end_endouttext {
887: my ($target,$token,$tagstack,$parstack,$parser,$safeeval)=@_;
888: my @result=('','');
889: if ($target eq "edit" || $target eq 'modified') { @result=('','no'); }
890: return (@result);
891: }
892:
893: sub delete_startouttext {
894: my ($target,$token,$tagstack,$parstack,$parser,$safeeval)=@_;
895: # my $text=&Apache::lonxml::get_all_text("endouttext",$parser);
896: my $text=$$parser['-1']->get_text("/endouttext");
897: my $ntoken=$$parser['-1']->get_token();
898: &Apache::lonxml::debug("Deleting :$text: and :$ntoken->[0]:$ntoken->[1]:$ntoken->[2]: for startouttext");
899: &Apache::lonxml::end_tag($tagstack,$parstack,$ntoken);
900: # Deleting 2 parallel tag pairs, but we need the numbers later to look like
901: # they did the last time round
902: &Apache::lonxml::increasedepth($ntoken);
903: &Apache::lonxml::decreasedepth($ntoken);
904: return 1;
905: }
906:
907: 1;
908: __END__
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