1: # The LearningOnline Network with CAPA
2: # definition of tags that give a structure to a document
3: #
4: # $Id: structuretags.pm,v 1.181 2003/06/07 04:08:43 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','languageblock','instructorcomment','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,undef,undef,undef,$publicuser)=
108: &Apache::lonxml::whichuser();
109: if ($symb eq '' && !$publicuser) {
110: my $help = &Apache::loncommon::help_open_topic("Ambiguous_Reference");
111: $help="Browsing resource, all submissions are temporary.<br />";
112: $body_tag_start.=$help;
113: }
114: }
115: }
116: my $form_tag_start;
117: if (!defined($found{'form'})) {
118: $form_tag_start='<form name="lonhomework" method="POST" action="'.
119: $ENV{'request.uri'}.'">';
120: }
121: return ($result,$head_tag_start,$body_tag_start,$form_tag_start);
122: }
123:
124: #use Time::HiRes();
125: sub get_resource_name {
126: my ($parstack,$safeeval)=@_;
127: my $name=&Apache::lonnet::gettitle();
128: if ($name eq '') {
129: $name=&Apache::lonnet::EXT('resource.title');
130: if ($name eq 'con_lost') { $name = ''; }
131: }
132: $Apache::lonhomework::name=$name;
133: return $name;
134: }
135:
136: sub setup_rndseed {
137: my ($safeeval)=@_;
138: my $rndseed;
139: my ($symb)=&Apache::lonxml::whichuser();
140: if ($ENV{'request.state'} eq "construct" || $symb eq '') {
141: $rndseed=$ENV{'form.rndseed'};
142: if (!$rndseed) {
143: $rndseed=$Apache::lonhomework::history{'rndseed'};
144: if (!$rndseed) {
145: $rndseed=time;
146: $ENV{'form.rndseed'}=$rndseed;
147: }
148: }
149: if ($ENV{'form.resetdata'} eq 'New Problem Variation' ||
150: $ENV{'form.newrandomization'} eq 'New Randomization') {
151: $rndseed=time;
152: if ($rndseed eq $ENV{'form.rndseed'}) {
153: srand($rndseed);
154: $rndseed=int(rand(1000000000));
155: }
156: $ENV{'form.rndseed'}=$rndseed;
157: delete($ENV{'form.resetdata'});
158: delete($ENV{'form.newrandomization'});
159: }
160: &Apache::lonxml::debug("Setting rndseed to $rndseed");
161: &Apache::run::run('$external::randomseed='.$rndseed.';',$safeeval);
162: }
163: return $rndseed;
164: }
165:
166: sub problem_edit_header {
167: return '<input type="hidden" name="submitted" value="edit" />
168: <input type="hidden" name="problemmode" value="Edit" />
169: <input type="submit" name="problemmode" value="Discard Edits and View" />
170: <input type="submit" name="problemmode" value="EditXML" />
171: <input type="submit" name="Undo" value="undo" /> <hr />
172: <input type="submit" name="submit" value="Submit Changes and Edit" />
173: <input type="submit" name="submit" value="Submit Changes and View" /><br /><p> </p><table border="0"><tr><td bgcolor="#DDDDDD">
174: ';
175: }
176:
177: sub problem_edit_footer {
178: return '</td></tr></table><br /><input type="submit" name="submit" value="Submit Changes and Edit" />
179: <input type="submit" name="submit" value="Submit Changes and View" />';
180: }
181:
182: sub problem_web_to_edit_header {
183: my ($rndseed)=@_;
184: my $result.='<input type="hidden" name="problemmode" value="View" />
185: <input type="submit" name="problemmode" value="Edit" />
186: <input type="submit" name="problemmode" value="EditXML" />
187: <input type="submit" name="newrandomization" value="New Randomization" />
188: <input type="submit" name="resetdata" value="Reset Submissions" />
189: <nobr><input type="submit" name="changerandseed" value="Change Random Seed To:" />
190: <input type="text" name="rndseed" width="10" value="'.
191: $rndseed.'"
192: onChange="javascript:document.lonhomework.changerandseed.click()" /></nobr>
193: <input type="checkbox" name="showallfoils" ';
194: if (defined($ENV{'form.showallfoils'})) { $result.='checked="on"'; }
195: $result.= ' /> Show All Foils
196: <hr />';
197: my $numtoanalyze=$ENV{'form.numtoanalyze'};
198: if (!$numtoanalyze) { $numtoanalyze=20; }
199: $result.= '<input type="submit" name="problemmode" value="Calculate answers" /> for
200: <input type="text" name="numtoanalyze" value="'.
201: $numtoanalyze.'" size="5" /> versions of this problem.'.
202: &Apache::loncommon::help_open_topic("Analyze_Problem",
203: '',undef,undef,300).
204: '<hr />';
205: return $result;
206: }
207:
208: sub initialize_storage {
209: %Apache::lonhomework::results=();
210: %Apache::lonhomework::history=();
211: my ($symb,$courseid,$domain,$name) = &Apache::lonxml::whichuser();
212: if ($ENV{'request.state'} eq 'construct' || $symb eq '') {
213: %Apache::lonhomework::history=
214: &Apache::lonnet::tmprestore($ENV{'request.uri'},'',$domain,$name);
215: my ($temp)=keys %Apache::lonhomework::history ;
216: &Apache::lonxml::debug("Return message of $temp");
217: } else {
218: %Apache::lonhomework::history=
219: &Apache::lonnet::restore($symb,$courseid,$domain,$name);
220: }
221: #ignore error conditions
222: my ($temp)=keys %Apache::lonhomework::history ;
223: if ($temp =~ m/^error:.*/) { %Apache::lonhomework::history=(); }
224: }
225:
226: # -------------------------------------------------------------finalize_storage
227: # Stores away the result has to a student's environment
228: # checks form.grade_ for specific values, other wises stores
229: # to the running users environment
230: sub finalize_storage {
231: my $result;
232: my ($temp) = keys %Apache::lonhomework::results;
233: if ( $temp ne '' ) {
234: my ($symb,$courseid,$domain,$name) = &Apache::lonxml::whichuser();
235: if ($ENV{'request.state'} eq 'construct' || $symb eq '') {
236: $Apache::lonhomework::results{'rndseed'}=$ENV{'form.rndseed'};
237: $result=&Apache::lonnet::tmpstore(\%Apache::lonhomework::results,
238: $ENV{'request.uri'},'',$domain,$name);
239: &Apache::lonxml::debug('Construct Store return message:'.$result);
240: } else {
241: $result=&Apache::lonnet::cstore(\%Apache::lonhomework::results,
242: $symb,$courseid,$domain,$name);
243: &Apache::lonxml::debug('Store return message:'.$result);
244: }
245: }
246: return $result;
247: }
248:
249: sub checkout_msg {
250: return (<<ENDCHECKOUT);
251: <h2>The resource needs to be checked out</h2>
252: As a resource gets checked out, a unique timestamped ID is given to it, and a
253: permanent record is left in the system.<p />
254: <font color=red>
255: Checking out resources is subject to course policies, and may exclude future
256: credit even if done erroneously.<p />
257: </font>
258: <form name="checkout" method="POST" action="$ENV{'request.uri'}">
259: <input type="hidden" name="doescheckout" value="yes" />
260: <input type="button" name="checkoutbutton" value="Check out Exam for Viewing" onClick="javascript:if (confirm('Check out Exam?')) { document.checkout.submit(); }" />
261: </form>
262: ENDCHECKOUT
263: }
264:
265: sub start_problem {
266: my ($target,$token,$tagstack,$parstack,$parser,$safeeval)=@_;
267:
268: $Apache::lonhomework::parsing_a_problem=1;
269: # meta is called from lonpublisher, which doesn't uses the normal
270: # lonhomework method of parsing the file which means that inputtags
271: # won't get reset
272: if ( $Apache::inputtags::part ne '' && $target != 'meta' ) {
273: &Apache::lonxml::error('Only one problem allowed in a .problem file');
274: my $bodytext=&Apache::lonxml::get_all_text("/problem",$parser);
275: return '';
276: }
277: #initialize globals
278: $Apache::inputtags::part='0';
279: @Apache::inputtags::partlist=('0');
280: @Apache::inputtags::responselist = ();
281: @Apache::inputtags::importlist = ();
282: @Apache::inputtags::previous=();
283: @Apache::inputtags::previous_version=();
284: $Apache::structuretags::printanswer='No';
285: @Apache::structuretags::whileconds=();
286: @Apache::structuretags::whilebody=();
287: @Apache::structuretags::whileline=();
288: $Apache::lonhomework::scantronmode=0;
289: $Apache::lonhomework::problemstatus=
290: &Apache::lonnet::EXT('resource.0.problemstatus');
291:
292: if (defined($ENV{'scantron.maxquest'})) {
293: $Apache::lonhomework::scantronmode=1;
294: }
295:
296: if ($target ne 'analyze') {
297: &initialize_storage();
298: if ($target eq 'web') {
299: &Apache::lonhomework::showhash(%Apache::lonhomework::history);
300: }
301: $Apache::lonhomework::type=&Apache::lonnet::EXT('resource.0.type');
302: &Apache::lonxml::debug("Found this to be of type :$Apache::lonhomework::type:");
303: }
304: if ($Apache::lonhomework::type eq '' ) {
305: my $uri=$ENV{'request.uri'};
306: if ($uri=~/\.(\w+)$/) {
307: $Apache::lonhomework::type=$1;
308: &Apache::lonxml::debug("Using type of $1");
309: } else {
310: $Apache::lonhomework::type='problem';
311: &Apache::lonxml::debug("Using default type, problem, :$uri:");
312: }
313: }
314:
315: #added vars to the scripting enviroment
316: my $expression='$external::part='.$Apache::inputtags::part.';';
317: &Apache::run::run($expression,$safeeval);
318: my $status;
319: my $accessmsg;
320:
321: #should get back a <html> or the neccesary stuff to start XML/MathML
322: my ($result,$head_tag_start,$body_tag_start,$form_tag_start)=
323: &page_start($target,$token,$tagstack,$parstack,$parser,$safeeval);
324: if ($target eq 'tex' and $ENV{'request.symb'} =~ m/\.page_/) {$result='';}
325:
326: if ($target eq 'analyze') { my $rndseed=&setup_rndseed($safeeval); }
327: if ($target eq 'web' || $target eq 'grade' || $target eq 'answer' ||
328: $target eq 'tex') {
329: #handle exam checkout
330: if ($Apache::lonhomework::type eq 'exam') {
331: my $token=
332: $Apache::lonhomework::history{"resource.0.outtoken"};
333: if (($ENV{'form.doescheckout'}) && (!$token)) {
334: $token=&Apache::lonxml::maketoken();
335: $Apache::lonhomework::history{"resource.0.outtoken"}=
336: $token;
337: }
338: $body_tag_start.=&Apache::lonxml::printtokenheader($target,$token);
339: }
340:
341: #handle rand seed in construction space
342: my $rndseed=&setup_rndseed($safeeval);
343: my ($symb)=&Apache::lonxml::whichuser();
344: if ($ENV{'request.state'} ne "construct" && $symb eq '') {
345: $form_tag_start.='<input type="hidden" name="rndseed" value="'.
346: $rndseed.'" />'.
347: '<input type="submit" name="resetdata"
348: value="New Problem Variation" />'.
349: '<input type="hidden" name="username"
350: value="'.$ENV{'form.username'}.'" />';
351: }
352: ($status,$accessmsg) = &Apache::lonhomework::check_access('0');
353: push (@Apache::inputtags::status,$status);
354: my $expression='$external::datestatus="'.$status.'";';
355: $expression.='$external::gradestatus="'.$Apache::lonhomework::history{"resource.0.solved"}.'";';
356: &Apache::run::run($expression,$safeeval);
357: &Apache::lonxml::debug("Got $status");
358: if (( $status eq 'CLOSED' ) ||
359: ( $status eq 'UNCHECKEDOUT') ||
360: ( $status eq 'BANNED') ||
361: ( $status eq 'UNAVAILABLE')) {
362: my $bodytext=&Apache::lonxml::get_all_text("/problem",$parser);
363: if ( $target eq "web" ) {
364: $result.= $head_tag_start.'</head>';
365: my $msg=$body_tag_start;
366: if ($status eq 'UNAVAILABLE') {
367: $result.='<h1>Unable to determine if this resource is open due to network problems. Please try again later.</h1>';
368: } else {
369: $result.='<h1>Not open to be viewed</h1>';
370: }
371: if ($status eq 'CLOSED') {
372: $msg.='The problem '.$accessmsg;
373: } elsif ($status eq 'UNCHECKEDOUT') {
374: $msg.=&checkout_msg;
375: }
376: $result.=$msg.'<br />';
377: } elsif ($target eq 'tex') {
378: $result.='\begin{document}\noindent \vskip 1 mm \begin{minipage}{\textwidth}\vskip 0 mm';
379: if ($status eq 'UNAVAILABLE') {
380: $result.='Unable to determine if this resource is open due to network problems. Please try again later.\vskip 0 mm ';
381: } else {
382: $result.="Problem is not open to be viewed. It $accessmsg \\vskip 0 mm ";
383: }
384: }
385: } elsif ($target eq 'web') {
386: my $name= &get_resource_name($parstack,$safeeval);
387: if ($status eq 'CAN_ANSWER') {
388: # create a page header and exit
389: $result.="$head_tag_start<title>$name</title></head>
390: $body_tag_start \n $form_tag_start".
391: '<input type="hidden" name="submitted" value="yes" />';
392: if ($ENV{'request.state'} eq "construct") {
393: $result.= &problem_web_to_edit_header($rndseed);
394: }
395: # if we are viewing someone else preserve that info
396: if (defined $ENV{'form.grade_symb'}) {
397: foreach my $field ('symb','courseid','domain','username') {
398: $result .= '<input type="hidden" name="grade_'.$field.
399: '" value="'.$ENV{"form.grade_$field"}.'" />'."\n";
400: }
401: }
402: } elsif ($status eq 'SHOW_ANSWER' || $status eq 'CANNOT_ANSWER'
403: || $status eq 'CLOSED' || $status eq 'UNAVALAILABLE') {
404: $result.=$head_tag_start.
405: "<title>$name</title></head>\n$body_tag_start\n";
406: }
407: } elsif ($target eq 'tex') {
408: my $startminipage = '';
409: if ($ENV{'form.problem_split'} ne 'yes') {
410: $startminipage = '\begin{minipage}{\textwidth}';
411: }
412: my $name= &Apache::lonxml::get_param('name',$parstack,$safeeval);
413: if ($name eq '') {
414: $name=&Apache::lonnet::EXT('resource.title');
415: if ($name eq 'con_lost') { $name = ''; }
416: }
417: $Apache::lonhomework::name=$name;
418: my $id = $Apache::inputtags::part;
419: my $weight = &Apache::lonnet::EXT("resource.$id.weight");
420: my $allkeys=&Apache::lonnet::metadata($ENV{'request.uri'},'keys');
421: my @allkeys = split /,/,$allkeys;
422: my $allow_print_points = 0;
423: foreach my $partial_key (@allkeys) {
424: if ($partial_key=~m/weight/) {
425: $allow_print_points++;
426: }
427: }
428: my $duedate = &Apache::lonnet::EXT("resource.$id.duedate");
429: $duedate = POSIX::strftime("%c",localtime($duedate));
430: my $temp_file;
431: my $filename = "/home/httpd/prtspool/$ENV{'user.name'}_$ENV{'user.domain'}_printout.due";
432: if (-e $filename) {
433: $temp_file = Apache::File->new($filename);
434: } else {
435: $temp_file = Apache::File->new('>>'.$filename);
436: }
437: my @due_file_content = <$temp_file>;
438: my $due_file_content = $due_file_content[$#due_file_content];
439: chomp $due_file_content;
440: my $name_of_resourse= &get_resource_name($parstack,$safeeval);
441: if ($due_file_content ne $duedate) {
442: $temp_file = Apache::File->new('>'.$filename);
443: print $temp_file "$duedate\n";
444: if (not $ENV{'request.symb'} =~ m/\.page_/) {
445: if(not $duedate=~m/1969/ and $Apache::lonhomework::type ne 'exam') {
446: $result .= '\begin{document} \typeout{STAMPOFPASSEDRESOURCESTART Resource <h2>"'.$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 '.$startminipage;
447: } else {
448: $result .= '\begin{document} \typeout{STAMPOFPASSEDRESOURCESTART Resource <h2>"'.$name_of_resourse.'"</h2> located in <br /><small><b>'.$ENV{'request.uri'}.'</b></small><br /> STAMPOFPASSEDRESOURCEEND} \noindent \vskip 1 mm \noindent'.$startminipage;
449: if ($Apache::lonhomework::type eq 'exam' and $allow_print_points==1) { $result .= '\fbox{\textit{'.$weight.' pt}}';}
450: }
451: } else {
452: $result .= '\vskip 1mm\textit{Due date: '.$duedate.'} \\\\\\\\';
453: }
454: } else {
455: if (not $ENV{'request.symb'} =~ m/\.page_/) {
456: $result .= '\begin{document} \typeout{STAMPOFPASSEDRESOURCESTART Resource <h2>"'.$name_of_resourse.'"</h2> located in <br /><small><b>'.$ENV{'request.uri'}.'</b></small><br /> STAMPOFPASSEDRESOURCEEND} \noindent \vskip 1 mm\noindent'.$startminipage;
457: if (($Apache::lonhomework::type eq 'exam') and ($allow_print_points==1)) { $result .= '\fbox{\textit{'.$weight.' pt}}';}
458: } else {
459: $result .= '\vskip 1mm \\\\\\\\';
460: }
461: }
462: }
463: } elsif ($target eq 'edit') {
464: $result.=$head_tag_start."</head>".$body_tag_start.$form_tag_start.
465: &problem_edit_header();
466: my $temp=&Apache::edit::insertlist($target,$token);
467: $result.=$temp;
468: } elsif ($target eq 'modified') {
469: $result=$token->[4];
470: $result.=&Apache::edit::handle_insert();
471: } else {
472: # page_start returned a starting result, delete it if we don't need it
473: $result = '';
474: }
475: return $result;
476: }
477:
478: sub end_problem {
479: my ($target,$token,$tagstack,$parstack,$parser,$safeeval)=@_;
480: my $result='';
481: my $status=$Apache::inputtags::status['-1'];
482: if ($target eq 'grade' || $target eq 'web' || $target eq 'answer' ||
483: $target eq 'tex') {
484: if ( $target eq 'grade' && $Apache::inputtags::part eq '0' &&
485: $status eq 'CAN_ANSWER' ) {
486: # if part is zero, no <part>s existed, so we need to the grading
487: &Apache::inputtags::grade;
488: } elsif ( ($target eq 'web' || $target eq 'tex') &&
489: $Apache::inputtags::part eq '0' &&
490: $status ne 'UNCHECKEDOUT') {
491: # if part is zero, no <part>s existed, so we need show the current
492: # grading status
493: my $gradestatus = &Apache::inputtags::gradestatus($Apache::inputtags::part,$target);
494: $result.= $gradestatus;
495: }
496: if (
497: (($target eq 'web') && ($ENV{'request.state'} ne 'construct')) ||
498: ($target eq 'answer') || ($target eq 'tex')
499: ) {
500: if ($status eq 'CAN_ANSWER') {
501: if ($target ne 'tex' &&
502: $ENV{'form.answer_output_mode'} ne 'tex') {
503: $result.="</form></body>\n";
504: }
505: } elsif ($status eq 'SHOW_ANSWER' || $status eq 'CANNOT_ANSWER' ||
506: $status eq 'UNCHECKEDOUT' ) {
507: if ($target ne 'tex') {
508: $result.="</body>\n";
509: }
510: }
511: if ($target eq 'web') {
512: $result.=&Apache::lonxml::xmlend();
513: } elsif ($target eq 'tex') {
514: my $endminipage = '';
515: if ($ENV{'form.problem_split'} ne 'yes') {
516: $endminipage = '\end{minipage}';
517: }
518: $result .= '\keephidden{ENDOFPROBLEM}\vskip 0.5mm\noindent\makebox[\textwidth/$number_of_columns][b]{\hrulefill}';
519: if (not $ENV{'request.symb'} =~ m/\.page_/) {
520: $result .= $endminipage.'\end{document} ';
521: } else {
522: $result .= '';
523: }
524: }
525: }
526: if ($target eq 'grade') {
527: &Apache::lonhomework::showhash(%Apache::lonhomework::results);
528: &finalize_storage();
529: }
530: if ($target eq 'answer' && ($ENV{'request.state'} eq 'construct')
531: && $ENV{'form.answer_output_mode'} ne 'tex') {
532: $result.='</html>'; # normally we get it from xmlend, but in CSTR
533: # we always show answer mode too.
534: }
535: } elsif ($target eq 'meta') {
536: if ($Apache::inputtags::part eq '0') {
537: @Apache::inputtags::response=();
538: $result=&Apache::response::mandatory_part_meta;
539: }
540: } elsif ($target eq 'edit') {
541: &Apache::lonxml::debug("in end_problem with $target, edit");
542: $result = &problem_edit_footer();
543: }
544:
545: if ($ENV{'request.state'} eq 'construct' && $target eq 'web') {
546: &Apache::inputtags::check_for_duplicate_ids();
547: }
548: undef(%Apache::lonhomework::history);
549: undef(%Apache::lonhomework::results);
550: undef($Apache::inputtags::part);
551: undef($Apache::lonhomework::parsing_a_problem);
552:
553: return $result;
554: }
555:
556:
557: sub start_library {
558: my ($target,$token,$tagstack,$parstack,$parser,$safeeval)=@_;
559: my ($result,$head_tag_start,$body_tag_start,$form_tag_start);
560:
561: if ($target eq 'edit') {
562: ($result,$head_tag_start,$body_tag_start,$form_tag_start)=
563: &page_start($target,$token,$tagstack,$parstack,$parser,$safeeval);
564: $result.=$head_tag_start."</head>".$body_tag_start.$form_tag_start.
565: &problem_edit_header();
566: my $temp=&Apache::edit::insertlist($target,$token);
567: $result.=$temp;
568: } elsif ($target eq 'modified') {
569: $result=$token->[4];
570: $result.=&Apache::edit::handle_insert();
571: } elsif ($target eq 'web' && $$tagstack[0] ne 'problem' &&
572: $ENV{'request.state'} eq "construct" ) {
573: ($result,$head_tag_start,$body_tag_start,$form_tag_start)=
574: &page_start($target,$token,$tagstack,$parstack,$parser,$safeeval);
575: my $name=&get_resource_name($parstack,$safeeval);
576: my $rndseed=&setup_rndseed($safeeval);
577: $result.="$head_tag_start<title>$name</title></head>
578: $body_tag_start \n $form_tag_start".
579: '<input type="hidden" name="submitted" value="yes" />';
580: $result.=&problem_web_to_edit_header($rndseed);
581: }
582: return $result;
583: }
584:
585: sub end_library {
586: my ($target,$token,$tagstack,$parstack,$parser,$safeeval)=@_;
587: my $result='';
588: if ($target eq 'edit') {
589: $result=&problem_edit_footer();
590: } elsif ($target eq 'web' && $$tagstack[0] ne 'problem' &&
591: $ENV{'request.state'} eq "construct") {
592: $result.='</form></body>'.&Apache::lonxml::xmlend();
593: }
594: return $result;
595: }
596:
597: sub start_block {
598: my ($target,$token,$tagstack,$parstack,$parser,$safeeval)=@_;
599:
600: my $result;
601:
602: if ($target eq 'web' || $target eq 'grade' || $target eq 'answer' ||
603: $target eq 'tex' || $target eq 'analyze') {
604: my $code = $token->[2]->{'condition'};
605: if ($code) {
606: if (!$Apache::lonxml::default_homework_loaded) {
607: &Apache::lonxml::default_homework_load($safeeval);
608: }
609: $result = &Apache::run::run($code,$safeeval);
610: &Apache::lonxml::debug("block :$code: returned :$result:");
611: } else {
612: $result='1';
613: }
614: if ( ! $result ) {
615: my $skip=&Apache::lonxml::get_all_text("/block",$parser);
616: &Apache::lonxml::debug("skipping ahead :$skip: $$parser[-1]");
617: }
618: $result='';
619: } elsif ($target eq 'edit') {
620: $result .=&Apache::edit::tag_start($target,$token);
621: $result .=&Apache::edit::text_arg('Test Condition:','condition',
622: $token,40);
623: $result .=&Apache::edit::end_row().&Apache::edit::start_spanning_row();
624: } elsif ($target eq 'modified') {
625: my $constructtag=&Apache::edit::get_new_args($token,$parstack,
626: $safeeval,'condition');
627: if ($constructtag) { $result = &Apache::edit::rebuild_tag($token); }
628: }
629: return $result;
630: }
631:
632: sub end_block {
633: my ($target,$token,$tagstack,$parstack,$parser,$safeeval)=@_;
634: my $result;
635: if ($target eq "edit") {
636: $result.= &Apache::edit::tag_end($target,$token,'');
637: }
638: return $result;
639: }
640:
641: sub start_languageblock {
642: my ($target,$token,$tagstack,$parstack,$parser,$safeeval)=@_;
643:
644: my $result;
645:
646: if ($target eq 'web' || $target eq 'grade' || $target eq 'answer' ||
647: $target eq 'tex' || $target eq 'analyze') {
648: my $include = $token->[2]->{'include'};
649: my $exclude = $token->[2]->{'exclude'};
650: my %languages=&Apache::loncommon::display_languages();
651: $result='1';
652: if ($include) {
653: $result='';
654: foreach (split(/\,/,$include)) {
655: if ($languages{$_}) { $result='1'; }
656: }
657: }
658: if ($exclude) {
659: foreach (split(/\,/,$exclude)) {
660: if ($languages{$_}) { $result='0'; }
661: }
662: }
663: if ( ! $result ) {
664: my $skip=&Apache::lonxml::get_all_text("/languageblock",$parser);
665: &Apache::lonxml::debug("skipping ahead :$skip: $$parser[-1]");
666: }
667: $result='';
668: } elsif ($target eq 'edit') {
669: $result .=&Apache::edit::tag_start($target,$token);
670: $result .=&Apache::edit::text_arg('Include Language:','include',
671: $token,40);
672: $result .=&Apache::edit::text_arg('Exclude Language:','exclude',
673: $token,40);
674: $result .=&Apache::edit::end_row().&Apache::edit::start_spanning_row();
675: } elsif ($target eq 'modified') {
676: my $constructtag=&Apache::edit::get_new_args($token,$parstack,
677: $safeeval,'include',
678: 'exclude');
679: if ($constructtag) { $result = &Apache::edit::rebuild_tag($token); }
680: }
681: return $result;
682: }
683:
684: sub end_languageblock {
685: my ($target,$token,$tagstack,$parstack,$parser,$safeeval)=@_;
686: my $result;
687: if ($target eq "edit") {
688: $result.= &Apache::edit::tag_end($target,$token,'');
689: }
690: return $result;
691: }
692:
693: sub start_instructorcomment {
694: my ($target,$token,$tagstack,$parstack,$parser,$safeeval)=@_;
695:
696: my $result;
697:
698: if ($target eq 'web' || $target eq 'grade' || $target eq 'answer' ||
699: $target eq 'tex' || $target eq 'analyze') {
700: $result=($ENV{'request.role'}=~/^(in|cc|au|ca|li)/);
701: if ( ! $result ) {
702: my $skip=&Apache::lonxml::get_all_text("/instructorcomment",$parser);
703: &Apache::lonxml::debug("skipping ahead :$skip: $$parser[-1]");
704: }
705: $result='';
706: } elsif ($target eq 'edit') {
707: $result .=&Apache::edit::tag_start($target,$token);
708: $result .=&Apache::edit::end_row().&Apache::edit::start_spanning_row();
709: }
710: return $result;
711: }
712:
713: sub end_instructorcomment {
714: my ($target,$token,$tagstack,$parstack,$parser,$safeeval)=@_;
715: my $result;
716: if ($target eq "edit") {
717: $result.= &Apache::edit::tag_end($target,$token,'');
718: }
719: return $result;
720: }
721:
722: sub start_while {
723: my ($target,$token,$tagstack,$parstack,$parser,$safeeval)=@_;
724:
725: my $result;
726: if ($target eq 'web' || $target eq 'grade' || $target eq 'answer' ||
727: $target eq 'tex' || $target eq 'analyze') {
728: my $code = $token->[2]->{'condition'};
729:
730: push( @Apache::structuretags::whileconds, $code);
731: if (!$Apache::lonxml::default_homework_loaded) {
732: &Apache::lonxml::default_homework_load($safeeval);
733: }
734: my $result = &Apache::run::run($code,$safeeval);
735: my $bodytext=&Apache::lonxml::get_all_text("/while",$parser);
736: push( @Apache::structuretags::whilebody, $bodytext);
737: push( @Apache::structuretags::whileline, $token->[5]);
738: &Apache::lonxml::debug("s code $code got -$result-");
739: if ( $result ) {
740: &Apache::lonxml::newparser($parser,\$bodytext);
741: }
742: } elsif ($target eq 'edit') {
743: $result .=&Apache::edit::tag_start($target,$token);
744: $result .=&Apache::edit::text_arg('Test Condition:','condition',
745: $token,40);
746: $result .=&Apache::edit::end_row().&Apache::edit::start_spanning_row();
747: } elsif ($target eq 'modified') {
748: my $constructtag=&Apache::edit::get_new_args($token,$parstack,
749: $safeeval,'condition');
750: if ($constructtag) { $result = &Apache::edit::rebuild_tag($token); }
751: }
752: return $result;
753: }
754:
755: sub end_while {
756: my ($target,$token,$tagstack,$parstack,$parser,$safeeval)=@_;
757: my $result;
758:
759: if ($target eq 'web' || $target eq 'grade' || $target eq 'answer' ||
760: $target eq 'tex' || $target eq 'analyze') {
761: my $code = pop(@Apache::structuretags::whileconds);
762: my $bodytext = pop(@Apache::structuretags::whilebody);
763: my $line = pop(@Apache::structuretags::whileline);
764: my $return = &Apache::run::run($code,$safeeval);
765: my $starttime=time;
766: my $error=0;
767: while ($return) {
768: if (time-$starttime >
769: $Apache::lonnet::perlvar{'lonScriptTimeout'}) {
770: $return = 0; $error=1; next;
771: }
772: $result.=&Apache::scripttag::xmlparse($bodytext);
773: $return = &Apache::run::run($code,$safeeval);
774: }
775: if ($error) {
776: &Apache::lonxml::error('<pre>Code ran too long. It ran for more than '.$Apache::lonnet::perlvar{'lonScriptTimeout'}.' seconds occured while running <while$gt; on line '.$line.'</pre>');
777: }
778: } elsif ($target eq "edit") {
779: $result.= &Apache::edit::tag_end($target,$token,'');
780: }
781: return $result;
782: }
783:
784: # <randomlist show="1">
785: # <tag1>..</tag1>
786: # <tag2>..</tag2>
787: # <tag3>..</tag3>
788: # ...
789: # </randomlist>
790: sub start_randomlist {
791: my ($target,$token,$tagstack,$parstack,$parser,$safeeval)=@_;
792: my $result;
793: if ($target eq 'answer' || $target eq 'grade' || $target eq 'web' ||
794: $target eq 'tex' || $target eq 'analyze') {
795: my $body= &Apache::lonxml::get_all_text("/randomlist",$parser);
796: my $b_parser= HTML::TokeParser->new(\$body);
797: my $b_tok;
798: my @randomlist;
799: my $list_item;
800: while($b_tok = $b_parser->get_token() ) {
801: if($b_tok->[0] eq 'S') { # start tag
802: # get content of the tag until matching end tag
803: # get all text upto the matching tag
804: # and push the content into @randomlist
805: $list_item = &Apache::lonxml::get_all_text('/'.$b_tok->[1],
806: $b_parser);
807: $list_item = "$b_tok->[4]"."$list_item"."</$b_tok->[1]>";
808: push(@randomlist,$list_item);
809: # print "<br /><b>START-TAG $b_tok->[1], $b_tok->[4],
810: # $list_item</b>";
811: }
812: if($b_tok->[0] eq 'T') { # text
813: # what to do with text in between tags?
814: # print "<b>TEXT $b_tok->[1]</b><br />";
815: }
816: # if($b_tok->[0] eq 'E') { # end tag, should not happen
817: # print "<b>END-TAG $b_tok->[1]</b><br />";
818: # }
819: }
820: my @idx_arr = (0 .. $#randomlist);
821: &Apache::structuretags::shuffle(\@idx_arr);
822: my $bodytext = '';
823: my $show=$#randomlist;
824: my $showarg=&Apache::lonxml::get_param('show',$parstack,$safeeval);
825: $showarg--;
826: if ( ($showarg >= 0) && ($showarg < $show) ) { $show = $showarg; }
827: for(0 .. $show) {
828: $bodytext .= "$randomlist[ $idx_arr[$_] ]";
829: }
830: &Apache::lonxml::newparser($parser,\$bodytext);
831: } elsif ($target eq 'edit' ) {
832: $result .=&Apache::edit::tag_start($target,$token);
833: $result .=&Apache::edit::text_arg('Maximum Tags to Show:','show',
834: $token,5);
835: $result .=&Apache::edit::end_row().&Apache::edit::start_spanning_row();
836: } elsif ($target eq 'modified' ) {
837: my $constructtag=&Apache::edit::get_new_args($token,$parstack,
838: $safeeval,'show');
839: if ($constructtag) { $result = &Apache::edit::rebuild_tag($token); }
840: }
841: return $result;
842: }
843:
844: sub shuffle {
845: my $a=shift;
846: my $i;
847: if (defined(@$a)) {
848: &Apache::response::setrandomnumber();
849: for($i=@$a;--$i;) {
850: my $j=int(&Math::Random::random_uniform() * ($i+1));
851: next if $i == $j;
852: @$a[$i,$j] = @$a[$j,$i];
853: }
854: }
855: }
856:
857: sub end_randomlist {
858: my ($target,$token,$tagstack,$parstack,$parser,$safeeval)=@_;
859: my $result;
860: if ($target eq 'edit' ) {
861: $result=&Apache::edit::tag_end($target,$token,
862: 'End Randomly Parsed Block');
863: }
864: return $result;
865: }
866:
867: sub start_part {
868: my ($target,$token,$tagstack,$parstack,$parser,$safeeval)=@_;
869: my $result='';
870: my $id= &Apache::lonxml::get_param('id',$parstack,$safeeval);
871: if ($id eq '') { $id = $Apache::lonxml::curdepth; }
872: $Apache::inputtags::part=$id;
873: push(@Apache::inputtags::partlist,$id);
874: @Apache::inputtags::response=();
875: @Apache::inputtags::previous=();
876: @Apache::inputtags::previous_version=();
877: $Apache::lonhomework::problemstatus=
878: &Apache::lonnet::EXT("resource.$id.problemstatus");
879: my $hidden=&Apache::loncommon::check_if_partid_hidden($Apache::inputtags::part);
880:
881: if ($target eq 'meta') {
882: return &Apache::response::mandatory_part_meta;
883: } elsif ($target eq 'web' || $target eq 'grade' ||
884: $target eq 'answer' || $target eq 'tex') {
885: if ($hidden) {
886: my $bodytext=&Apache::lonxml::get_all_text("/part",$parser);
887: } else {
888: my ($status,$accessmsg) = &Apache::lonhomework::check_access($id);
889: push (@Apache::inputtags::status,$status);
890: my $expression='$external::datestatus="'.$status.'";';
891: $expression.='$external::gradestatus="'.$Apache::lonhomework::history{"resource.$id.solved"}.'";';
892: &Apache::run::run($expression,$safeeval);
893: if ( $status eq 'CLOSED' ) {
894: my $bodytext=&Apache::lonxml::get_all_text("/part",$parser);
895: if ( $target eq "web" ) {
896: $result="<br />Part is not open to be viewed. It $accessmsg<br />";
897: } elsif ( $target eq 'tex' ) {
898: $result="\\end{minipage}\\vskip 0 mm Part is not open to be viewed. It $accessmsg \\\\\\begin{minipage}{\\textwidth}";
899: }
900: } else {
901: if ($target eq 'tex') {
902: $result.='\noindent \end{minipage}\vskip 0 mm \noindent \begin{minipage}{\textwidth}\noindent';
903: my $weight = &Apache::lonnet::EXT("resource.$id.weight");
904: if ($Apache::lonhomework::type eq 'exam') { $result .= '\fbox{\textit{'.$weight.' pt}}';}
905: }
906: }
907: }
908: } elsif ($target eq 'edit') {
909: $result.=&Apache::edit::tag_start($target,$token);
910: $result.=&Apache::edit::text_arg('Part ID:','id',$token).
911: &Apache::loncommon::help_open_topic("Part_Tag_Edit_Help").
912: &Apache::edit::end_row().&Apache::edit::start_spanning_row();
913: } elsif ($target eq 'modified') {
914: my $constructtag=&Apache::edit::get_new_args($token,$parstack,
915: $safeeval,'id');
916: if ($constructtag) {
917: $result = &Apache::edit::rebuild_tag($token);
918: $result.=&Apache::edit::handle_insert();
919: }
920: }
921: return $result;
922: }
923:
924: sub end_part {
925: my ($target,$token,$tagstack,$parstack,$parser,$safeeval)=@_;
926: &Apache::lonxml::debug("in end_part $target ");
927: my $status=$Apache::inputtags::status['-1'];
928: my $hidden=&Apache::loncommon::check_if_partid_hidden($Apache::inputtags::part);
929: my $result='';
930: if ( $target eq 'meta' ) {
931: $result='';
932: } elsif ( $target eq 'grade' && $status eq 'CAN_ANSWER' && !$hidden) {
933: $result=&Apache::inputtags::grade;
934: } elsif (($target eq 'web' || $target eq 'tex') && !$hidden ) {
935: my $gradestatus=&Apache::inputtags::gradestatus($Apache::inputtags::part,
936: $target);
937: if ($Apache::lonhomework::type eq 'exam') {$gradestatus='';}
938: $result=$gradestatus;
939: } elsif ($target eq 'edit') {
940: $result=&Apache::edit::end_table();
941: }
942: pop @Apache::inputtags::status;
943: $Apache::inputtags::part='';
944: return $result;
945: }
946:
947: sub start_preduedate {
948: my ($target,$token,$tagstack,$parstack,$parser,$safeeval)=@_;
949: if ($target eq 'web' || $target eq 'grade' || $target eq 'answer' || $target eq 'tex') {
950: if ($Apache::inputtags::status['-1'] ne 'CAN_ANSWER' &&
951: $Apache::inputtags::status['-1'] ne 'CANNOT_ANSWER' &&
952: $Apache::inputtags::status['-1'] ne 'SHOW_ANSWER') {
953: &Apache::lonxml::get_all_text("/preduedate",$parser);
954: }
955: }
956: return '';
957: }
958:
959: sub end_preduedate {
960: return '';
961: }
962:
963: sub start_postanswerdate {
964: my ($target,$token,$tagstack,$parstack,$parser,$safeeval)=@_;
965: if ($target eq 'web' || $target eq 'grade' || $target eq 'tex') {
966: if ($Apache::inputtags::status['-1'] ne 'SHOW_ANSWER') {
967: &Apache::lonxml::get_all_text("/postanswerdate",$parser);
968: }
969: } elsif ($target eq 'tex') {
970: return '\vskip 0 mm \noindent';
971: }
972: return '';
973: }
974:
975: sub end_postanswerdate {
976: return '';
977: }
978:
979: sub start_notsolved {
980: my ($target,$token,$tagstack,$parstack,$parser,$safeeval)=@_;
981: if ($target eq 'web' || $target eq 'grade' || $target eq 'answer' ||
982: $target eq 'tex') {
983: my $gradestatus=$Apache::lonhomework::history{"resource.$Apache::inputtags::part.solved"};
984: &Apache::lonxml::debug("not solved has :$gradestatus:");
985: if ($gradestatus =~ /^correct/) {
986: &Apache::lonxml::debug("skipping");
987: &Apache::lonxml::get_all_text("/notsolved",$parser);
988: }
989: }
990: return '';
991: }
992:
993: sub end_notsolved {
994: return '';
995: }
996:
997: sub start_solved {
998: my ($target,$token,$tagstack,$parstack,$parser,$safeeval)=@_;
999: if ($target eq 'web' || $target eq 'grade' || $target eq 'answer' ||
1000: $target eq 'tex') {
1001: my $gradestatus=$Apache::lonhomework::history{"resource.$Apache::inputtags::part.solved"};
1002: if ($gradestatus !~ /^correct/) {
1003: &Apache::lonxml::get_all_text("/solved",$parser);
1004: }
1005: }
1006: return '';
1007: }
1008:
1009: sub end_solved {
1010: return '';
1011: }
1012:
1013: sub start_startouttext {
1014: my ($target,$token,$tagstack,$parstack,$parser,$safeeval)=@_;
1015: my @result=(''.'');
1016: if ($target eq 'edit' || $target eq 'modified' ) { @result=('','no'); }
1017: return (@result);
1018: }
1019:
1020: sub end_startouttext {
1021: my ($target,$token,$tagstack,$parstack,$parser,$safeeval)=@_;
1022: my $result='';
1023: my $text='';
1024:
1025: if ($target eq 'edit') {
1026: $text=&Apache::lonxml::get_all_text("endouttext",$parser);
1027: $result.=&Apache::edit::start_table($token)."<tr><td>Text Block</td>
1028: <td>Delete:".
1029: &Apache::edit::deletelist($target,$token)
1030: ."</td>
1031: <td>".
1032: &Apache::edit::insertlist($target,$token).
1033: &Apache::edit::end_row().
1034: &Apache::edit::start_spanning_row()."\n"
1035: .'<table><tr><td>'.
1036: &Apache::loncommon::help_open_topic("Greek_Symbols",
1037: 'Greek Symbols',
1038: undef,undef,600)
1039: .'</td><td>'.
1040: &Apache::loncommon::help_open_topic("Other_Symbols",
1041: 'Other Symbols',
1042: undef,undef,600)
1043: .'</td></tr></table>'.
1044: &Apache::edit::editfield($token->[1],$text,"",80,4);
1045: }
1046: if ($target eq 'modified') {
1047: $text=&Apache::lonxml::get_all_text("endouttext",$parser);
1048: $result='<startouttext />'.&Apache::edit::modifiedfield();
1049: }
1050: if ($target eq 'tex') {
1051: $result .= '\noindent ';
1052: }
1053: return $result;
1054: }
1055:
1056: sub start_endouttext {
1057: my ($target,$token,$tagstack,$parstack,$parser,$safeeval)=@_;
1058: my $result='';
1059: if ($target eq "edit" ) { $result="</td></tr>".&Apache::edit::end_table()."\n"; }
1060: if ($target eq "modified") {
1061: $result='<endouttext />'.
1062: &Apache::edit::handle_insertafter('startouttext'); }
1063: return $result;
1064: }
1065:
1066: sub end_endouttext {
1067: my ($target,$token,$tagstack,$parstack,$parser,$safeeval)=@_;
1068: my @result=('','');
1069: if ($target eq "edit" || $target eq 'modified') { @result=('','no'); }
1070: return (@result);
1071: }
1072:
1073: sub delete_startouttext {
1074: my ($target,$token,$tagstack,$parstack,$parser,$safeeval)=@_;
1075: # my $text=&Apache::lonxml::get_all_text("endouttext",$parser);
1076: my $text=$$parser['-1']->get_text("/endouttext");
1077: my $ntoken=$$parser['-1']->get_token();
1078: &Apache::lonxml::debug("Deleting :$text: and :$ntoken->[0]:$ntoken->[1]:$ntoken->[2]: for startouttext");
1079: &Apache::lonxml::end_tag($tagstack,$parstack,$ntoken);
1080: # Deleting 2 parallel tag pairs, but we need the numbers later to look like
1081: # they did the last time round
1082: &Apache::lonxml::increasedepth($ntoken);
1083: &Apache::lonxml::decreasedepth($ntoken);
1084: return 1;
1085: }
1086:
1087: 1;
1088: __END__
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