1: # The LearningOnline Network with CAPA
2: # definition of tags that give a structure to a document
3: #
4: # $Id: structuretags.pm,v 1.189 2003/06/23 19:55:18 sakharuk 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: if (!($target eq 'web' || $target eq 'edit' || $target eq 'modified' ||
47: $target eq 'answer' || $target eq 'grade' || $target eq 'meta' )) {
48: my $bodytext=&Apache::lonxml::get_all_text("/web",$parser);
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: if (!($target eq 'tex' || $target eq 'edit' || $target eq 'modified' ||
60: $target eq 'answer' || $target eq 'grade' || $target eq 'meta' )) {
61: &Apache::lonxml::debug("tex 1");
62: my $bodytext=&Apache::lonxml::get_all_text("/tex",$parser);
63: }
64: return '';
65: }
66:
67: sub end_tex {
68: return '';
69: }
70:
71: sub page_start {
72: my ($target,$token,$tagstack,$parstack,$parser,$safeeval)=@_;
73: my %found;
74: foreach my $taginside ($tagstack) {
75: foreach my $taglookedfor ('html','body','form') {
76: if ($taginside =~ /^$taglookedfor$/i) {$found{$taglookedfor} = 1;}
77: }
78: }
79:
80: my $result;
81: my $head_tag_start;
82: if (!defined($found{'html'})) {
83: $result=&Apache::londefdef::start_html($target,$token,$tagstack,
84: $parstack,$parser,$safeeval);
85: $head_tag_start='<head>'.&Apache::lonmenu::registerurl(undef,$target);
86: }
87: my $body_tag_start;
88: if (!defined($found{'body'})) {
89: $body_tag_start='<body onLoad="'.&Apache::lonmenu::loadevents().'" '.
90: 'onUnload="'.&Apache::lonmenu::unloadevents().'" ';
91: my $background=&Apache::lonxml::get_param('background',$parstack,
92: $safeeval);
93: if ($background) {
94: $Apache::lonxml::extlinks[$#Apache::lonxml::extlinks+1]=
95: $background;
96: $body_tag_start.='background="'.$background.'" ';
97: } else {
98: my $bgcolor=&Apache::lonxml::get_param('bgcolor',$parstack,
99: $safeeval);
100: if ($bgcolor) {
101: $body_tag_start.='bgcolor="'.$bgcolor.'" ';
102: } else {
103: $body_tag_start.='bgcolor="#ffffff"';
104: }
105: }
106: $body_tag_start.='>'.&Apache::lonmenu::menubuttons(undef,$target,1);
107: if ($target eq 'web' && $ENV{'request.state'} ne 'construct') {
108: my ($symb,undef,undef,undef,$publicuser)=
109: &Apache::lonxml::whichuser();
110: if ($symb eq '' && !$publicuser) {
111: my $help = &Apache::loncommon::help_open_topic("Ambiguous_Reference");
112: $help="Browsing resource, all submissions are temporary.<br />";
113: $body_tag_start.=$help;
114: }
115: }
116: }
117: my $form_tag_start;
118: if (!defined($found{'form'})) {
119: $form_tag_start='<form name="lonhomework" method="POST" action="'.
120: $ENV{'request.uri'}.'">';
121: }
122: return ($result,$head_tag_start,$body_tag_start,$form_tag_start);
123: }
124:
125: #use Time::HiRes();
126: sub get_resource_name {
127: my ($parstack,$safeeval)=@_;
128: my $name=&Apache::lonnet::gettitle();
129: if ($name eq '') {
130: $name=&Apache::lonnet::EXT('resource.title');
131: if ($name eq 'con_lost') { $name = ''; }
132: }
133: $Apache::lonhomework::name=$name;
134: return $name;
135: }
136:
137: sub setup_rndseed {
138: my ($safeeval)=@_;
139: my $rndseed;
140: my ($symb)=&Apache::lonxml::whichuser();
141: if ($ENV{'request.state'} eq "construct" || $symb eq '') {
142: $rndseed=$ENV{'form.rndseed'};
143: if (!$rndseed) {
144: $rndseed=$Apache::lonhomework::history{'rndseed'};
145: if (!$rndseed) {
146: $rndseed=time;
147: $ENV{'form.rndseed'}=$rndseed;
148: }
149: }
150: if ($ENV{'form.resetdata'} eq 'New Problem Variation' ||
151: $ENV{'form.newrandomization'} eq 'New Randomization') {
152: $rndseed=time;
153: if ($rndseed eq $ENV{'form.rndseed'}) {
154: srand($rndseed);
155: $rndseed=int(rand(1000000000));
156: }
157: $ENV{'form.rndseed'}=$rndseed;
158: delete($ENV{'form.resetdata'});
159: delete($ENV{'form.newrandomization'});
160: }
161: if (defined($rndseed) && $rndseed ne int($rndseed)) {
162: $rndseed=join(',',&Math::Random::random_seed_from_phrase($rndseed));
163: }
164: &Apache::lonxml::debug("Setting rndseed to $rndseed");
165: &Apache::run::run('$external::randomseed='.$rndseed.';',$safeeval);
166: }
167: return $rndseed;
168: }
169:
170: sub problem_edit_header {
171: return '<input type="hidden" name="submitted" value="edit" />
172: <input type="hidden" name="problemmode" value="Edit" />
173: <input type="submit" name="problemmode" value="Discard Edits and View" />
174: <input type="submit" name="problemmode" value="EditXML" />
175: <input type="submit" name="Undo" value="undo" /> <hr />
176: <input type="submit" name="submit" value="Submit Changes and Edit" />
177: <input type="submit" name="submit" value="Submit Changes and View" /><br /><p> </p><table border="0"><tr><td bgcolor="#DDDDDD">
178: ';
179: }
180:
181: sub problem_edit_footer {
182: return '</td></tr></table><br /><input type="submit" name="submit" value="Submit Changes and Edit" />
183: <input type="submit" name="submit" value="Submit Changes and View" />';
184: }
185:
186: sub problem_web_to_edit_header {
187: my ($rndseed)=@_;
188: my $result.='<input type="hidden" name="problemmode" value="View" />
189: <input type="submit" name="problemmode" value="Edit" />
190: <input type="submit" name="problemmode" value="EditXML" />
191: <input type="submit" name="newrandomization" value="New Randomization" />
192: <input type="submit" name="resetdata" value="Reset Submissions" />
193: <nobr><input type="submit" name="changerandseed" value="Change Random Seed To:" />
194: <input type="text" name="rndseed" width="10" value="'.
195: $rndseed.'"
196: onChange="javascript:document.lonhomework.changerandseed.click()" /></nobr>
197: <input type="checkbox" name="showallfoils" ';
198: if (defined($ENV{'form.showallfoils'})) { $result.='checked="on"'; }
199: $result.= ' /> Show All Foils
200: <hr />';
201: my $numtoanalyze=$ENV{'form.numtoanalyze'};
202: if (!$numtoanalyze) { $numtoanalyze=20; }
203: $result.= '<input type="submit" name="problemmode" value="Calculate answers" /> for
204: <input type="text" name="numtoanalyze" value="'.
205: $numtoanalyze.'" size="5" /> versions of this problem.'.
206: &Apache::loncommon::help_open_topic("Analyze_Problem",
207: '',undef,undef,300).
208: '<hr />';
209: return $result;
210: }
211:
212: sub initialize_storage {
213: %Apache::lonhomework::results=();
214: %Apache::lonhomework::history=();
215: my ($symb,$courseid,$domain,$name) = &Apache::lonxml::whichuser();
216: if ($ENV{'request.state'} eq 'construct' || $symb eq '') {
217: %Apache::lonhomework::history=
218: &Apache::lonnet::tmprestore($ENV{'request.uri'},'',$domain,$name);
219: my ($temp)=keys %Apache::lonhomework::history ;
220: &Apache::lonxml::debug("Return message of $temp");
221: } else {
222: %Apache::lonhomework::history=
223: &Apache::lonnet::restore($symb,$courseid,$domain,$name);
224: }
225: #ignore error conditions
226: my ($temp)=keys %Apache::lonhomework::history ;
227: if ($temp =~ m/^error:.*/) { %Apache::lonhomework::history=(); }
228: }
229:
230: # -------------------------------------------------------------finalize_storage
231: # Stores away the result has to a student's environment
232: # checks form.grade_ for specific values, other wises stores
233: # to the running users environment
234: sub finalize_storage {
235: my $result;
236: my ($temp) = keys %Apache::lonhomework::results;
237: if ( $temp ne '' ) {
238: my ($symb,$courseid,$domain,$name) = &Apache::lonxml::whichuser();
239: if ($ENV{'request.state'} eq 'construct' || $symb eq '') {
240: $Apache::lonhomework::results{'rndseed'}=$ENV{'form.rndseed'};
241: $result=&Apache::lonnet::tmpstore(\%Apache::lonhomework::results,
242: $ENV{'request.uri'},'',$domain,$name);
243: &Apache::lonxml::debug('Construct Store return message:'.$result);
244: } else {
245: $result=&Apache::lonnet::cstore(\%Apache::lonhomework::results,
246: $symb,$courseid,$domain,$name);
247: &Apache::lonxml::debug('Store return message:'.$result);
248: }
249: }
250: return $result;
251: }
252:
253: sub checkout_msg {
254: return (<<ENDCHECKOUT);
255: <h2>The resource needs to be checked out</h2>
256: As a resource gets checked out, a unique timestamped ID is given to it, and a
257: permanent record is left in the system.<p />
258: <font color=red>
259: Checking out resources is subject to course policies, and may exclude future
260: credit even if done erroneously.<p />
261: </font>
262: <form name="checkout" method="POST" action="$ENV{'request.uri'}">
263: <input type="hidden" name="doescheckout" value="yes" />
264: <input type="button" name="checkoutbutton" value="Check out Exam for Viewing" onClick="javascript:if (confirm('Check out Exam?')) { document.checkout.submit(); }" />
265: </form>
266: ENDCHECKOUT
267: }
268:
269: sub start_problem {
270: my ($target,$token,$tagstack,$parstack,$parser,$safeeval)=@_;
271:
272: if ( $Apache::inputtags::part ne '' ||
273: $Apache::lonhomework::parsing_a_problem) {
274: &Apache::lonxml::error('Only one <problem> allowed in a .problem file');
275: #my $bodytext=&Apache::lonxml::get_all_text("/problem",$parser);
276: return '';
277: }
278:
279: $Apache::lonhomework::parsing_a_problem=1;
280: #initialize globals
281: $Apache::inputtags::part='0';
282: @Apache::inputtags::partlist=('0');
283: @Apache::inputtags::responselist = ();
284: @Apache::inputtags::importlist = ();
285: @Apache::inputtags::previous=();
286: @Apache::inputtags::previous_version=();
287: $Apache::structuretags::printanswer='No';
288: @Apache::structuretags::whileconds=();
289: @Apache::structuretags::whilebody=();
290: @Apache::structuretags::whileline=();
291: $Apache::lonhomework::scantronmode=0;
292: $Apache::lonhomework::problemstatus=
293: &Apache::lonnet::EXT('resource.0.problemstatus');
294:
295: if (defined($ENV{'scantron.maxquest'})) {
296: $Apache::lonhomework::scantronmode=1;
297: }
298:
299: if ($target ne 'analyze') {
300: &initialize_storage();
301: if ($target eq 'web') {
302: &Apache::lonhomework::showhash(%Apache::lonhomework::history);
303: }
304: $Apache::lonhomework::type=&Apache::lonnet::EXT('resource.0.type');
305: &Apache::lonxml::debug("Found this to be of type :$Apache::lonhomework::type:");
306: }
307: if ($Apache::lonhomework::type eq '' ) {
308: my $uri=$ENV{'request.uri'};
309: if ($uri=~/\.(\w+)$/) {
310: $Apache::lonhomework::type=$1;
311: &Apache::lonxml::debug("Using type of $1");
312: } else {
313: $Apache::lonhomework::type='problem';
314: &Apache::lonxml::debug("Using default type, problem, :$uri:");
315: }
316: }
317:
318: #added vars to the scripting enviroment
319: my $expression='$external::part='.$Apache::inputtags::part.';';
320: &Apache::run::run($expression,$safeeval);
321: my $status;
322: my $accessmsg;
323:
324: #should get back a <html> or the neccesary stuff to start XML/MathML
325: my ($result,$head_tag_start,$body_tag_start,$form_tag_start)=
326: &page_start($target,$token,$tagstack,$parstack,$parser,$safeeval);
327: if ($target eq 'tex' and $ENV{'request.symb'} =~ m/\.page_/) {$result='';}
328:
329: if ($target eq 'analyze') { my $rndseed=&setup_rndseed($safeeval); }
330: if ($target eq 'web' || $target eq 'grade' || $target eq 'answer' ||
331: $target eq 'tex') {
332: #handle exam checkout
333: if ($Apache::lonhomework::type eq 'exam') {
334: my $token=
335: $Apache::lonhomework::history{"resource.0.outtoken"};
336: if (($ENV{'form.doescheckout'}) && (!$token)) {
337: $token=&Apache::lonxml::maketoken();
338: $Apache::lonhomework::history{"resource.0.outtoken"}=
339: $token;
340: }
341: $body_tag_start.=&Apache::lonxml::printtokenheader($target,$token);
342: }
343:
344: #handle rand seed in construction space
345: my $rndseed=&setup_rndseed($safeeval);
346: my ($symb)=&Apache::lonxml::whichuser();
347: if ($ENV{'request.state'} ne "construct" && $symb eq '') {
348: $form_tag_start.='<input type="hidden" name="rndseed" value="'.
349: $rndseed.'" />'.
350: '<input type="submit" name="resetdata"
351: value="New Problem Variation" />'.
352: '<input type="hidden" name="username"
353: value="'.$ENV{'form.username'}.'" /> <br />';
354: }
355: ($status,$accessmsg) = &Apache::lonhomework::check_access('0');
356: push (@Apache::inputtags::status,$status);
357: my $expression='$external::datestatus="'.$status.'";';
358: $expression.='$external::gradestatus="'.$Apache::lonhomework::history{"resource.0.solved"}.'";';
359: &Apache::run::run($expression,$safeeval);
360: &Apache::lonxml::debug("Got $status");
361: if (( $status eq 'CLOSED' ) ||
362: ( $status eq 'UNCHECKEDOUT') ||
363: ( $status eq 'BANNED') ||
364: ( $status eq 'UNAVAILABLE')) {
365: my $bodytext=&Apache::lonxml::get_all_text("/problem",$parser);
366: if ( $target eq "web" ) {
367: $result.= $head_tag_start.'</head>';
368: my $msg=$body_tag_start;
369: if ($status eq 'UNAVAILABLE') {
370: $result.='<h1>Unable to determine if this resource is open due to network problems. Please try again later.</h1>';
371: } else {
372: $result.='<h1>Not open to be viewed</h1>';
373: }
374: if ($status eq 'CLOSED') {
375: $msg.='The problem '.$accessmsg;
376: } elsif ($status eq 'UNCHECKEDOUT') {
377: $msg.=&checkout_msg;
378: }
379: $result.=$msg.'<br />';
380: } elsif ($target eq 'tex') {
381: $result.='\begin{document}\noindent \vskip 1 mm \begin{minipage}{\textwidth}\vskip 0 mm';
382: if ($status eq 'UNAVAILABLE') {
383: $result.='Unable to determine if this resource is open due to network problems. Please try again later.\vskip 0 mm ';
384: } else {
385: $result.="Problem is not open to be viewed. It $accessmsg \\vskip 0 mm ";
386: }
387: }
388: } elsif ($target eq 'web') {
389: my $name= &get_resource_name($parstack,$safeeval);
390: if ($status eq 'CAN_ANSWER') {
391: # create a page header and exit
392: $result.="$head_tag_start<title>$name</title></head>
393: $body_tag_start \n $form_tag_start".
394: '<input type="hidden" name="submitted" value="yes" />';
395: if ($ENV{'request.state'} eq "construct") {
396: $result.= &problem_web_to_edit_header($ENV{'form.rndseed'});
397: }
398: # if we are viewing someone else preserve that info
399: if (defined $ENV{'form.grade_symb'}) {
400: foreach my $field ('symb','courseid','domain','username') {
401: $result .= '<input type="hidden" name="grade_'.$field.
402: '" value="'.$ENV{"form.grade_$field"}.'" />'."\n";
403: }
404: }
405: } elsif ($status eq 'SHOW_ANSWER' || $status eq 'CANNOT_ANSWER'
406: || $status eq 'CLOSED' || $status eq 'UNAVALAILABLE') {
407: $result.=$head_tag_start.
408: "<title>$name</title></head>\n$body_tag_start\n";
409: }
410: } elsif ($target eq 'tex') {
411: my $startminipage = '';
412: if ($ENV{'form.problem_split'} ne 'yes') {
413: $startminipage = '\begin{minipage}{\textwidth}';
414: }
415: my $name= &Apache::lonxml::get_param('name',$parstack,$safeeval);
416: if ($name eq '') {
417: $name=&Apache::lonnet::EXT('resource.title');
418: if ($name eq 'con_lost') { $name = ''; }
419: }
420: $Apache::lonhomework::name=$name;
421: my $id = $Apache::inputtags::part;
422: my $weight = &Apache::lonnet::EXT("resource.$id.weight");
423: my $allkeys=&Apache::lonnet::metadata($ENV{'request.uri'},'keys');
424: my @allkeys = split /,/,$allkeys;
425: my $allow_print_points = 0;
426: foreach my $partial_key (@allkeys) {
427: if ($partial_key=~m/weight/) {
428: $allow_print_points++;
429: }
430: }
431: my $duedate = &Apache::lonnet::EXT("resource.$id.duedate");
432: $duedate = POSIX::strftime("%c",localtime($duedate));
433: my $temp_file;
434: my $filename = "/home/httpd/prtspool/$ENV{'user.name'}_$ENV{'user.domain'}_printout.due";
435: if (-e $filename) {
436: $temp_file = Apache::File->new($filename);
437: } else {
438: $temp_file = Apache::File->new('>>'.$filename);
439: }
440: my @due_file_content = <$temp_file>;
441: my $due_file_content = $due_file_content[$#due_file_content];
442: chomp $due_file_content;
443: my $name_of_resourse= &get_resource_name($parstack,$safeeval);
444: if ($due_file_content ne $duedate) {
445: $temp_file = Apache::File->new('>'.$filename);
446: print $temp_file "$duedate\n";
447: if (not $ENV{'request.symb'} =~ m/\.page_/) {
448: if(not $duedate=~m/1969/ and $Apache::lonhomework::type ne 'exam') {
449: $result .= '\begin{document} \typeout{STAMPOFPASSEDRESOURCESTART Resource <h2>"'.$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;
450: } else {
451: $result .= '\begin{document} \typeout{STAMPOFPASSEDRESOURCESTART Resource <h2>"'.$name_of_resourse.'"</h2> located in <br /><small><b>'.$ENV{'request.uri'}.'</b></small><br /> STAMPOFPASSEDRESOURCEEND} \noindent \vskip 1 mm \noindent'.$startminipage;
452: if ($Apache::lonhomework::type eq 'exam' and $allow_print_points==1) { $result .= '\fbox{\textit{'.$weight.' pt}}';}
453: }
454: } else {
455: $result .= '\vskip 1mm\textit{Due date: '.$duedate.'} \\\\\\\\';
456: }
457: } else {
458: if (not $ENV{'request.symb'} =~ m/\.page_/) {
459: $result .= '\begin{document} \typeout{STAMPOFPASSEDRESOURCESTART Resource <h2>"'.$name_of_resourse.'"</h2> located in <br /><small><b>'.$ENV{'request.uri'}.'</b></small><br /> STAMPOFPASSEDRESOURCEEND} \noindent \vskip 1 mm\noindent'.$startminipage;
460: if (($Apache::lonhomework::type eq 'exam') and ($allow_print_points==1)) { $result .= '\fbox{\textit{'.$weight.' pt}}';}
461: } else {
462: $result .= '\vskip 1mm \\\\\\\\';
463: }
464: }
465: }
466: } elsif ($target eq 'edit') {
467: $result.=$head_tag_start."</head>".$body_tag_start.$form_tag_start.
468: &problem_edit_header();
469: my $temp=&Apache::edit::insertlist($target,$token);
470: $result.=$temp;
471: } elsif ($target eq 'modified') {
472: $result=$token->[4];
473: $result.=&Apache::edit::handle_insert();
474: } else {
475: # page_start returned a starting result, delete it if we don't need it
476: $result = '';
477: }
478: return $result;
479: }
480:
481: sub end_problem {
482: my ($target,$token,$tagstack,$parstack,$parser,$safeeval)=@_;
483: my $result='';
484: my $status=$Apache::inputtags::status['-1'];
485: if ($target eq 'grade' || $target eq 'web' || $target eq 'answer' ||
486: $target eq 'tex') {
487: if ( $target eq 'grade' && $Apache::inputtags::part eq '0' &&
488: $status eq 'CAN_ANSWER' ) {
489: # if part is zero, no <part>s existed, so we need to the grading
490: &Apache::inputtags::grade;
491: } elsif ( ($target eq 'web' || $target eq 'tex') &&
492: $Apache::inputtags::part eq '0' &&
493: $status ne 'UNCHECKEDOUT') {
494: # if part is zero, no <part>s existed, so we need show the current
495: # grading status
496: my $gradestatus = &Apache::inputtags::gradestatus($Apache::inputtags::part,$target);
497: $result.= $gradestatus;
498: }
499: if (
500: (($target eq 'web') && ($ENV{'request.state'} ne 'construct')) ||
501: ($target eq 'answer') || ($target eq 'tex')
502: ) {
503: if ($status eq 'CAN_ANSWER') {
504: if ($target ne 'tex' &&
505: $ENV{'form.answer_output_mode'} ne 'tex') {
506: $result.="</form></body>\n";
507: }
508: } elsif ($status eq 'SHOW_ANSWER' || $status eq 'CANNOT_ANSWER' ||
509: $status eq 'UNCHECKEDOUT' ) {
510: if ($target ne 'tex' &&
511: $ENV{'form.answer_output_mode'} ne 'tex') {
512: $result.="</body>\n";
513: }
514: }
515: if ($target eq 'web') {
516: $result.=&Apache::lonxml::xmlend();
517: } elsif ($target eq 'tex') {
518: my $endminipage = '';
519: if ($ENV{'form.problem_split'} ne 'yes') {
520: $endminipage = '\end{minipage}';
521: }
522: $result .= '\keephidden{ENDOFPROBLEM}\vskip 0.5mm\noindent\makebox[\textwidth/$number_of_columns][b]{\hrulefill}';
523: if (not $ENV{'request.symb'} =~ m/\.page_/) {
524: $result .= $endminipage.'\end{document} ';
525: } else {
526: $result .= '';
527: }
528: }
529: }
530: if ($target eq 'grade') {
531: &Apache::lonhomework::showhash(%Apache::lonhomework::results);
532: &finalize_storage();
533: }
534: if ($target eq 'answer' && ($ENV{'request.state'} eq 'construct')
535: && $ENV{'form.answer_output_mode'} ne 'tex') {
536: $result.='</html>'; # normally we get it from xmlend, but in CSTR
537: # we always show answer mode too.
538: }
539: } elsif ($target eq 'meta') {
540: if ($Apache::inputtags::part eq '0') {
541: @Apache::inputtags::response=();
542: $result=&Apache::response::mandatory_part_meta;
543: }
544: } elsif ($target eq 'edit') {
545: &Apache::lonxml::debug("in end_problem with $target, edit");
546: $result = &problem_edit_footer();
547: }
548:
549: if ($ENV{'request.state'} eq 'construct' && $target eq 'web') {
550: &Apache::inputtags::check_for_duplicate_ids();
551: }
552: undef(%Apache::lonhomework::history);
553: undef(%Apache::lonhomework::results);
554: undef($Apache::inputtags::part);
555: undef($Apache::lonhomework::parsing_a_problem);
556:
557: return $result;
558: }
559:
560:
561: sub start_library {
562: my ($target,$token,$tagstack,$parstack,$parser,$safeeval)=@_;
563: my ($result,$head_tag_start,$body_tag_start,$form_tag_start);
564:
565: if ($target eq 'edit') {
566: ($result,$head_tag_start,$body_tag_start,$form_tag_start)=
567: &page_start($target,$token,$tagstack,$parstack,$parser,$safeeval);
568: $result.=$head_tag_start."</head>".$body_tag_start.$form_tag_start.
569: &problem_edit_header();
570: my $temp=&Apache::edit::insertlist($target,$token);
571: $result.=$temp;
572: } elsif ($target eq 'modified') {
573: $result=$token->[4];
574: $result.=&Apache::edit::handle_insert();
575: } elsif ($target eq 'web' && $$tagstack[0] ne 'problem' &&
576: $ENV{'request.state'} eq "construct" ) {
577: ($result,$head_tag_start,$body_tag_start,$form_tag_start)=
578: &page_start($target,$token,$tagstack,$parstack,$parser,$safeeval);
579: my $name=&get_resource_name($parstack,$safeeval);
580: my $rndseed=&setup_rndseed($safeeval);
581: $result.="$head_tag_start<title>$name</title></head>
582: $body_tag_start \n $form_tag_start".
583: '<input type="hidden" name="submitted" value="yes" />';
584: $result.=&problem_web_to_edit_header($rndseed);
585: }
586: return $result;
587: }
588:
589: sub end_library {
590: my ($target,$token,$tagstack,$parstack,$parser,$safeeval)=@_;
591: my $result='';
592: if ($target eq 'edit') {
593: $result=&problem_edit_footer();
594: } elsif ($target eq 'web' && $$tagstack[0] ne 'problem' &&
595: $ENV{'request.state'} eq "construct") {
596: $result.='</form></body>'.&Apache::lonxml::xmlend();
597: }
598: return $result;
599: }
600:
601: sub start_block {
602: my ($target,$token,$tagstack,$parstack,$parser,$safeeval)=@_;
603:
604: my $result;
605:
606: if ($target eq 'web' || $target eq 'grade' || $target eq 'answer' ||
607: $target eq 'tex' || $target eq 'analyze') {
608: my $code = $token->[2]->{'condition'};
609: if ($code) {
610: if (!$Apache::lonxml::default_homework_loaded) {
611: &Apache::lonxml::default_homework_load($safeeval);
612: }
613: $result = &Apache::run::run($code,$safeeval);
614: &Apache::lonxml::debug("block :$code: returned :$result:");
615: } else {
616: $result='1';
617: }
618: if ( ! $result ) {
619: my $skip=&Apache::lonxml::get_all_text("/block",$parser);
620: &Apache::lonxml::debug("skipping ahead :$skip: $$parser[-1]");
621: }
622: $result='';
623: } elsif ($target eq 'edit') {
624: $result .=&Apache::edit::tag_start($target,$token);
625: $result .=&Apache::edit::text_arg('Test Condition:','condition',
626: $token,40);
627: $result .=&Apache::edit::end_row().&Apache::edit::start_spanning_row();
628: } elsif ($target eq 'modified') {
629: my $constructtag=&Apache::edit::get_new_args($token,$parstack,
630: $safeeval,'condition');
631: if ($constructtag) { $result = &Apache::edit::rebuild_tag($token); }
632: }
633: return $result;
634: }
635:
636: sub end_block {
637: my ($target,$token,$tagstack,$parstack,$parser,$safeeval)=@_;
638: my $result;
639: if ($target eq "edit") {
640: $result.= &Apache::edit::tag_end($target,$token,'');
641: }
642: return $result;
643: }
644:
645: sub start_languageblock {
646: my ($target,$token,$tagstack,$parstack,$parser,$safeeval)=@_;
647:
648: my $result;
649:
650: if ($target eq 'web' || $target eq 'grade' || $target eq 'answer' ||
651: $target eq 'tex' || $target eq 'analyze') {
652: &Apache::lonxml::startredirection();
653: } elsif ($target eq 'edit') {
654: $result .=&Apache::edit::tag_start($target,$token);
655: $result .=&Apache::edit::text_arg('Include Language:','include',
656: $token,40);
657: $result .=&Apache::edit::text_arg('Exclude Language:','exclude',
658: $token,40);
659: $result .=&Apache::edit::end_row().&Apache::edit::start_spanning_row();
660: } elsif ($target eq 'modified') {
661: my $constructtag=&Apache::edit::get_new_args($token,$parstack,
662: $safeeval,'include',
663: 'exclude');
664: if ($constructtag) { $result = &Apache::edit::rebuild_tag($token); }
665: }
666: return $result;
667: }
668:
669: sub end_languageblock {
670: my ($target,$token,$tagstack,$parstack,$parser,$safeeval)=@_;
671: my $result;
672:
673: if ($target eq 'web' || $target eq 'grade' || $target eq 'answer' ||
674: $target eq 'tex' || $target eq 'analyze') {
675: my $text=&Apache::lonxml::endredirection();
676: my $include= &Apache::lonxml::get_param('include',$parstack,$safeeval);
677: my $exclude= &Apache::lonxml::get_param('exclude',$parstack,$safeeval);
678: my %languages=&Apache::loncommon::display_languages();
679: $result='1';
680: if ($include) {
681: $result='';
682: foreach (split(/\,/,$include)) {
683: if ($languages{$_}) { $result='1'; }
684: }
685: }
686: if ($exclude) {
687: foreach (split(/\,/,$exclude)) {
688: if ($languages{$_}) { $result='0'; }
689: }
690: }
691: if ( ! $result ) {
692: $result='';
693: } else {
694: $result=$text;
695: }
696: } elsif ($target eq "edit") {
697: $result.= &Apache::edit::tag_end($target,$token,'');
698: }
699: return $result;
700: }
701:
702: sub start_instructorcomment {
703: my ($target,$token,$tagstack,$parstack,$parser,$safeeval)=@_;
704:
705: my $result;
706:
707: if ($target eq 'web' || $target eq 'grade' || $target eq 'answer' ||
708: $target eq 'tex' || $target eq 'analyze') {
709: $result=($ENV{'request.role'}=~/^(in|cc|au|ca|li)/);
710: if ( ! $result ) {
711: my $skip=&Apache::lonxml::get_all_text("/instructorcomment",$parser);
712: &Apache::lonxml::debug("skipping ahead :$skip: $$parser[-1]");
713: }
714: $result='';
715: } elsif ($target eq 'edit') {
716: $result .=&Apache::edit::tag_start($target,$token);
717: $result .=&Apache::edit::end_row().&Apache::edit::start_spanning_row();
718: }
719: return $result;
720: }
721:
722: sub end_instructorcomment {
723: my ($target,$token,$tagstack,$parstack,$parser,$safeeval)=@_;
724: my $result;
725: if ($target eq "edit") {
726: $result.= &Apache::edit::tag_end($target,$token,'');
727: }
728: return $result;
729: }
730:
731: sub start_while {
732: my ($target,$token,$tagstack,$parstack,$parser,$safeeval)=@_;
733:
734: my $result;
735: if ($target eq 'web' || $target eq 'grade' || $target eq 'answer' ||
736: $target eq 'tex' || $target eq 'analyze') {
737: my $code = $token->[2]->{'condition'};
738:
739: push( @Apache::structuretags::whileconds, $code);
740: if (!$Apache::lonxml::default_homework_loaded) {
741: &Apache::lonxml::default_homework_load($safeeval);
742: }
743: my $result = &Apache::run::run($code,$safeeval);
744: my $bodytext=&Apache::lonxml::get_all_text("/while",$parser);
745: push( @Apache::structuretags::whilebody, $bodytext);
746: push( @Apache::structuretags::whileline, $token->[5]);
747: &Apache::lonxml::debug("s code $code got -$result-");
748: if ( $result ) {
749: &Apache::lonxml::newparser($parser,\$bodytext);
750: }
751: } elsif ($target eq 'edit') {
752: $result .=&Apache::edit::tag_start($target,$token);
753: $result .=&Apache::edit::text_arg('Test Condition:','condition',
754: $token,40);
755: $result .=&Apache::edit::end_row().&Apache::edit::start_spanning_row();
756: } elsif ($target eq 'modified') {
757: my $constructtag=&Apache::edit::get_new_args($token,$parstack,
758: $safeeval,'condition');
759: if ($constructtag) { $result = &Apache::edit::rebuild_tag($token); }
760: }
761: return $result;
762: }
763:
764: sub end_while {
765: my ($target,$token,$tagstack,$parstack,$parser,$safeeval)=@_;
766: my $result;
767:
768: if ($target eq 'web' || $target eq 'grade' || $target eq 'answer' ||
769: $target eq 'tex' || $target eq 'analyze') {
770: my $code = pop(@Apache::structuretags::whileconds);
771: my $bodytext = pop(@Apache::structuretags::whilebody);
772: my $line = pop(@Apache::structuretags::whileline);
773: my $return = &Apache::run::run($code,$safeeval);
774: my $starttime=time;
775: my $error=0;
776: while ($return) {
777: if (time-$starttime >
778: $Apache::lonnet::perlvar{'lonScriptTimeout'}) {
779: $return = 0; $error=1; next;
780: }
781: $result.=&Apache::scripttag::xmlparse($bodytext);
782: $return = &Apache::run::run($code,$safeeval);
783: }
784: if ($error) {
785: &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 '.$line.'</pre>');
786: }
787: } elsif ($target eq "edit") {
788: $result.= &Apache::edit::tag_end($target,$token,'');
789: }
790: return $result;
791: }
792:
793: # <randomlist show="1">
794: # <tag1>..</tag1>
795: # <tag2>..</tag2>
796: # <tag3>..</tag3>
797: # ...
798: # </randomlist>
799: sub start_randomlist {
800: my ($target,$token,$tagstack,$parstack,$parser,$safeeval)=@_;
801: my $result;
802: if ($target eq 'answer' || $target eq 'grade' || $target eq 'web' ||
803: $target eq 'tex' || $target eq 'analyze') {
804: my $body= &Apache::lonxml::get_all_text("/randomlist",$parser);
805: my $b_parser= HTML::TokeParser->new(\$body);
806: my $b_tok;
807: my @randomlist;
808: my $list_item;
809: while($b_tok = $b_parser->get_token() ) {
810: if($b_tok->[0] eq 'S') { # start tag
811: # get content of the tag until matching end tag
812: # get all text upto the matching tag
813: # and push the content into @randomlist
814: $list_item = &Apache::lonxml::get_all_text('/'.$b_tok->[1],
815: $b_parser);
816: $list_item = "$b_tok->[4]"."$list_item"."</$b_tok->[1]>";
817: push(@randomlist,$list_item);
818: # print "<br /><b>START-TAG $b_tok->[1], $b_tok->[4],
819: # $list_item</b>";
820: }
821: if($b_tok->[0] eq 'T') { # text
822: # what to do with text in between tags?
823: # print "<b>TEXT $b_tok->[1]</b><br />";
824: }
825: # if($b_tok->[0] eq 'E') { # end tag, should not happen
826: # print "<b>END-TAG $b_tok->[1]</b><br />";
827: # }
828: }
829: my @idx_arr = (0 .. $#randomlist);
830: &Apache::structuretags::shuffle(\@idx_arr);
831: my $bodytext = '';
832: my $show=$#randomlist;
833: my $showarg=&Apache::lonxml::get_param('show',$parstack,$safeeval);
834: $showarg--;
835: if ( ($showarg >= 0) && ($showarg < $show) ) { $show = $showarg; }
836: for(0 .. $show) {
837: $bodytext .= "$randomlist[ $idx_arr[$_] ]";
838: }
839: &Apache::lonxml::newparser($parser,\$bodytext);
840: } elsif ($target eq 'edit' ) {
841: $result .=&Apache::edit::tag_start($target,$token);
842: $result .=&Apache::edit::text_arg('Maximum Tags to Show:','show',
843: $token,5);
844: $result .=&Apache::edit::end_row().&Apache::edit::start_spanning_row();
845: } elsif ($target eq 'modified' ) {
846: my $constructtag=&Apache::edit::get_new_args($token,$parstack,
847: $safeeval,'show');
848: if ($constructtag) { $result = &Apache::edit::rebuild_tag($token); }
849: }
850: return $result;
851: }
852:
853: sub shuffle {
854: my $a=shift;
855: my $i;
856: if (defined(@$a)) {
857: &Apache::response::setrandomnumber();
858: for($i=@$a;--$i;) {
859: my $j=int(&Math::Random::random_uniform() * ($i+1));
860: next if $i == $j;
861: @$a[$i,$j] = @$a[$j,$i];
862: }
863: }
864: }
865:
866: sub end_randomlist {
867: my ($target,$token,$tagstack,$parstack,$parser,$safeeval)=@_;
868: my $result;
869: if ($target eq 'edit' ) {
870: $result=&Apache::edit::tag_end($target,$token,
871: 'End Randomly Parsed Block');
872: }
873: return $result;
874: }
875:
876: sub start_part {
877: my ($target,$token,$tagstack,$parstack,$parser,$safeeval)=@_;
878: my $result='';
879: my $id= &Apache::lonxml::get_param('id',$parstack,$safeeval);
880: if ($id eq '') { $id = $Apache::lonxml::curdepth; }
881: $Apache::inputtags::part=$id;
882: push(@Apache::inputtags::partlist,$id);
883: @Apache::inputtags::response=();
884: @Apache::inputtags::previous=();
885: @Apache::inputtags::previous_version=();
886: $Apache::lonhomework::problemstatus=
887: &Apache::lonnet::EXT("resource.$id.problemstatus");
888: my $hidden=&Apache::loncommon::check_if_partid_hidden($Apache::inputtags::part);
889:
890: if ($target eq 'meta') {
891: return &Apache::response::mandatory_part_meta;
892: } elsif ($target eq 'web' || $target eq 'grade' ||
893: $target eq 'answer' || $target eq 'tex') {
894: if ($hidden) {
895: my $bodytext=&Apache::lonxml::get_all_text("/part",$parser);
896: } else {
897: my ($status,$accessmsg) = &Apache::lonhomework::check_access($id);
898: push (@Apache::inputtags::status,$status);
899: my $expression='$external::datestatus="'.$status.'";';
900: $expression.='$external::gradestatus="'.$Apache::lonhomework::history{"resource.$id.solved"}.'";';
901: &Apache::run::run($expression,$safeeval);
902: if ( $status eq 'CLOSED' ) {
903: my $bodytext=&Apache::lonxml::get_all_text("/part",$parser);
904: if ( $target eq "web" ) {
905: $result="<br />Part is not open to be viewed. It $accessmsg<br />";
906: } elsif ( $target eq 'tex' ) {
907: $result="\\end{minipage}\\vskip 0 mm Part is not open to be viewed. It $accessmsg \\\\\\begin{minipage}{\\textwidth}";
908: }
909: } else {
910: if ($target eq 'tex') {
911: $result.='\noindent \end{minipage}\vskip 0 mm \noindent \begin{minipage}{\textwidth}\noindent';
912: my $weight = &Apache::lonnet::EXT("resource.$id.weight");
913: if ($Apache::lonhomework::type eq 'exam') { $result .= '\fbox{\textit{'.$weight.' pt}}';}
914: }
915: }
916: }
917: } elsif ($target eq 'edit') {
918: $result.=&Apache::edit::tag_start($target,$token);
919: $result.=&Apache::edit::text_arg('Part ID:','id',$token).
920: &Apache::loncommon::help_open_topic("Part_Tag_Edit_Help").
921: &Apache::edit::end_row().&Apache::edit::start_spanning_row();
922: } elsif ($target eq 'modified') {
923: my $constructtag=&Apache::edit::get_new_args($token,$parstack,
924: $safeeval,'id');
925: if ($constructtag) {
926: $result = &Apache::edit::rebuild_tag($token);
927: $result.=&Apache::edit::handle_insert();
928: }
929: }
930: return $result;
931: }
932:
933: sub end_part {
934: my ($target,$token,$tagstack,$parstack,$parser,$safeeval)=@_;
935: &Apache::lonxml::debug("in end_part $target ");
936: my $status=$Apache::inputtags::status['-1'];
937: my $hidden=&Apache::loncommon::check_if_partid_hidden($Apache::inputtags::part);
938: my $result='';
939: if ( $target eq 'meta' ) {
940: $result='';
941: } elsif ( $target eq 'grade' && $status eq 'CAN_ANSWER' && !$hidden) {
942: $result=&Apache::inputtags::grade;
943: } elsif (($target eq 'web' || $target eq 'tex') && !$hidden ) {
944: my $gradestatus=&Apache::inputtags::gradestatus($Apache::inputtags::part,
945: $target);
946: if ($Apache::lonhomework::type eq 'exam') {$gradestatus='';}
947: $result=$gradestatus;
948: } elsif ($target eq 'edit') {
949: $result=&Apache::edit::end_table();
950: }
951: pop @Apache::inputtags::status;
952: $Apache::inputtags::part='';
953: return $result;
954: }
955:
956: sub start_preduedate {
957: my ($target,$token,$tagstack,$parstack,$parser,$safeeval)=@_;
958: if ($target eq 'web' || $target eq 'grade' || $target eq 'answer' || $target eq 'tex') {
959: if ($Apache::inputtags::status['-1'] ne 'CAN_ANSWER' &&
960: $Apache::inputtags::status['-1'] ne 'CANNOT_ANSWER' &&
961: $Apache::inputtags::status['-1'] ne 'SHOW_ANSWER') {
962: &Apache::lonxml::get_all_text("/preduedate",$parser);
963: }
964: }
965: return '';
966: }
967:
968: sub end_preduedate {
969: return '';
970: }
971:
972: sub start_postanswerdate {
973: my ($target,$token,$tagstack,$parstack,$parser,$safeeval)=@_;
974: if ($target eq 'web' || $target eq 'grade' || $target eq 'tex') {
975: if ($Apache::inputtags::status['-1'] ne 'SHOW_ANSWER') {
976: &Apache::lonxml::get_all_text("/postanswerdate",$parser);
977: }
978: } elsif ($target eq 'tex') {
979: return '\vskip 0 mm \noindent';
980: }
981: return '';
982: }
983:
984: sub end_postanswerdate {
985: return '';
986: }
987:
988: sub start_notsolved {
989: my ($target,$token,$tagstack,$parstack,$parser,$safeeval)=@_;
990: if ($target eq 'web' || $target eq 'grade' || $target eq 'answer' ||
991: $target eq 'tex') {
992: my $gradestatus=$Apache::lonhomework::history{"resource.$Apache::inputtags::part.solved"};
993: &Apache::lonxml::debug("not solved has :$gradestatus:");
994: if ($gradestatus =~ /^correct/) {
995: &Apache::lonxml::debug("skipping");
996: &Apache::lonxml::get_all_text("/notsolved",$parser);
997: }
998: }
999: return '';
1000: }
1001:
1002: sub end_notsolved {
1003: return '';
1004: }
1005:
1006: sub start_solved {
1007: my ($target,$token,$tagstack,$parstack,$parser,$safeeval)=@_;
1008: if ($target eq 'web' || $target eq 'grade' || $target eq 'answer' ||
1009: $target eq 'tex') {
1010: my $gradestatus=$Apache::lonhomework::history{"resource.$Apache::inputtags::part.solved"};
1011: if ($gradestatus !~ /^correct/) {
1012: &Apache::lonxml::get_all_text("/solved",$parser);
1013: }
1014: }
1015: return '';
1016: }
1017:
1018: sub end_solved {
1019: return '';
1020: }
1021:
1022: sub start_startouttext {
1023: my ($target,$token,$tagstack,$parstack,$parser,$safeeval)=@_;
1024: my @result=(''.'');
1025: if ($target eq 'edit' || $target eq 'modified' ) { @result=('','no'); }
1026: return (@result);
1027: }
1028:
1029: sub end_startouttext {
1030: my ($target,$token,$tagstack,$parstack,$parser,$safeeval)=@_;
1031: my $result='';
1032: my $text='';
1033:
1034: if ($target eq 'edit') {
1035: $text=&Apache::lonxml::get_all_text("endouttext",$parser);
1036: $result.=&Apache::edit::start_table($token)."<tr><td>Text Block</td>
1037: <td>Delete:".
1038: &Apache::edit::deletelist($target,$token)
1039: ."</td>
1040: <td>".
1041: &Apache::edit::insertlist($target,$token).
1042: &Apache::edit::end_row().
1043: &Apache::edit::start_spanning_row()."\n"
1044: . &Apache::loncommon::helpLatexCheatsheet () .
1045: &Apache::edit::editfield($token->[1],$text,"",80,4);
1046: }
1047: if ($target eq 'modified') {
1048: $text=&Apache::lonxml::get_all_text("endouttext",$parser);
1049: $result='<startouttext />'.&Apache::edit::modifiedfield();
1050: }
1051: if ($target eq 'tex') {
1052: $result .= '\noindent ';
1053: }
1054: return $result;
1055: }
1056:
1057: sub start_endouttext {
1058: my ($target,$token,$tagstack,$parstack,$parser,$safeeval)=@_;
1059: my $result='';
1060: if ($target eq "edit" ) { $result="</td></tr>".&Apache::edit::end_table()."\n"; }
1061: if ($target eq "modified") {
1062: $result='<endouttext />'.
1063: &Apache::edit::handle_insertafter('startouttext'); }
1064: return $result;
1065: }
1066:
1067: sub end_endouttext {
1068: my ($target,$token,$tagstack,$parstack,$parser,$safeeval)=@_;
1069: my @result=('','');
1070: if ($target eq "edit" || $target eq 'modified') { @result=('','no'); }
1071: return (@result);
1072: }
1073:
1074: sub delete_startouttext {
1075: my ($target,$token,$tagstack,$parstack,$parser,$safeeval)=@_;
1076: # my $text=&Apache::lonxml::get_all_text("endouttext",$parser);
1077: my $text=$$parser['-1']->get_text("/endouttext");
1078: my $ntoken=$$parser['-1']->get_token();
1079: &Apache::lonxml::debug("Deleting :$text: and :$ntoken->[0]:$ntoken->[1]:$ntoken->[2]: for startouttext");
1080: &Apache::lonxml::end_tag($tagstack,$parstack,$ntoken);
1081: # Deleting 2 parallel tag pairs, but we need the numbers later to look like
1082: # they did the last time round
1083: &Apache::lonxml::increasedepth($ntoken);
1084: &Apache::lonxml::decreasedepth($ntoken);
1085: return 1;
1086: }
1087:
1088: 1;
1089: __END__
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