1: # The LearningOnline Network with CAPA
2: # definition of tags that give a structure to a document
3: #
4: # $Id: structuretags.pm,v 1.182 2003/06/12 22:19:33 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: 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: &Apache::lonxml::debug("Setting rndseed to $rndseed");
162: &Apache::run::run('$external::randomseed='.$rndseed.';',$safeeval);
163: }
164: return $rndseed;
165: }
166:
167: sub problem_edit_header {
168: return '<input type="hidden" name="submitted" value="edit" />
169: <input type="hidden" name="problemmode" value="Edit" />
170: <input type="submit" name="problemmode" value="Discard Edits and View" />
171: <input type="submit" name="problemmode" value="EditXML" />
172: <input type="submit" name="Undo" value="undo" /> <hr />
173: <input type="submit" name="submit" value="Submit Changes and Edit" />
174: <input type="submit" name="submit" value="Submit Changes and View" /><br /><p> </p><table border="0"><tr><td bgcolor="#DDDDDD">
175: ';
176: }
177:
178: sub problem_edit_footer {
179: return '</td></tr></table><br /><input type="submit" name="submit" value="Submit Changes and Edit" />
180: <input type="submit" name="submit" value="Submit Changes and View" />';
181: }
182:
183: sub problem_web_to_edit_header {
184: my ($rndseed)=@_;
185: my $result.='<input type="hidden" name="problemmode" value="View" />
186: <input type="submit" name="problemmode" value="Edit" />
187: <input type="submit" name="problemmode" value="EditXML" />
188: <input type="submit" name="newrandomization" value="New Randomization" />
189: <input type="submit" name="resetdata" value="Reset Submissions" />
190: <nobr><input type="submit" name="changerandseed" value="Change Random Seed To:" />
191: <input type="text" name="rndseed" width="10" value="'.
192: $rndseed.'"
193: onChange="javascript:document.lonhomework.changerandseed.click()" /></nobr>
194: <input type="checkbox" name="showallfoils" ';
195: if (defined($ENV{'form.showallfoils'})) { $result.='checked="on"'; }
196: $result.= ' /> Show All Foils
197: <hr />';
198: my $numtoanalyze=$ENV{'form.numtoanalyze'};
199: if (!$numtoanalyze) { $numtoanalyze=20; }
200: $result.= '<input type="submit" name="problemmode" value="Calculate answers" /> for
201: <input type="text" name="numtoanalyze" value="'.
202: $numtoanalyze.'" size="5" /> versions of this problem.'.
203: &Apache::loncommon::help_open_topic("Analyze_Problem",
204: '',undef,undef,300).
205: '<hr />';
206: return $result;
207: }
208:
209: sub initialize_storage {
210: %Apache::lonhomework::results=();
211: %Apache::lonhomework::history=();
212: my ($symb,$courseid,$domain,$name) = &Apache::lonxml::whichuser();
213: if ($ENV{'request.state'} eq 'construct' || $symb eq '') {
214: %Apache::lonhomework::history=
215: &Apache::lonnet::tmprestore($ENV{'request.uri'},'',$domain,$name);
216: my ($temp)=keys %Apache::lonhomework::history ;
217: &Apache::lonxml::debug("Return message of $temp");
218: } else {
219: %Apache::lonhomework::history=
220: &Apache::lonnet::restore($symb,$courseid,$domain,$name);
221: }
222: #ignore error conditions
223: my ($temp)=keys %Apache::lonhomework::history ;
224: if ($temp =~ m/^error:.*/) { %Apache::lonhomework::history=(); }
225: }
226:
227: # -------------------------------------------------------------finalize_storage
228: # Stores away the result has to a student's environment
229: # checks form.grade_ for specific values, other wises stores
230: # to the running users environment
231: sub finalize_storage {
232: my $result;
233: my ($temp) = keys %Apache::lonhomework::results;
234: if ( $temp ne '' ) {
235: my ($symb,$courseid,$domain,$name) = &Apache::lonxml::whichuser();
236: if ($ENV{'request.state'} eq 'construct' || $symb eq '') {
237: $Apache::lonhomework::results{'rndseed'}=$ENV{'form.rndseed'};
238: $result=&Apache::lonnet::tmpstore(\%Apache::lonhomework::results,
239: $ENV{'request.uri'},'',$domain,$name);
240: &Apache::lonxml::debug('Construct Store return message:'.$result);
241: } else {
242: $result=&Apache::lonnet::cstore(\%Apache::lonhomework::results,
243: $symb,$courseid,$domain,$name);
244: &Apache::lonxml::debug('Store return message:'.$result);
245: }
246: }
247: return $result;
248: }
249:
250: sub checkout_msg {
251: return (<<ENDCHECKOUT);
252: <h2>The resource needs to be checked out</h2>
253: As a resource gets checked out, a unique timestamped ID is given to it, and a
254: permanent record is left in the system.<p />
255: <font color=red>
256: Checking out resources is subject to course policies, and may exclude future
257: credit even if done erroneously.<p />
258: </font>
259: <form name="checkout" method="POST" action="$ENV{'request.uri'}">
260: <input type="hidden" name="doescheckout" value="yes" />
261: <input type="button" name="checkoutbutton" value="Check out Exam for Viewing" onClick="javascript:if (confirm('Check out Exam?')) { document.checkout.submit(); }" />
262: </form>
263: ENDCHECKOUT
264: }
265:
266: sub start_problem {
267: my ($target,$token,$tagstack,$parstack,$parser,$safeeval)=@_;
268:
269: $Apache::lonhomework::parsing_a_problem=1;
270: # meta is called from lonpublisher, which doesn't uses the normal
271: # lonhomework method of parsing the file which means that inputtags
272: # won't get reset
273: if ( $Apache::inputtags::part ne '' && $target != 'meta' ) {
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: #initialize globals
279: $Apache::inputtags::part='0';
280: @Apache::inputtags::partlist=('0');
281: @Apache::inputtags::responselist = ();
282: @Apache::inputtags::importlist = ();
283: @Apache::inputtags::previous=();
284: @Apache::inputtags::previous_version=();
285: $Apache::structuretags::printanswer='No';
286: @Apache::structuretags::whileconds=();
287: @Apache::structuretags::whilebody=();
288: @Apache::structuretags::whileline=();
289: $Apache::lonhomework::scantronmode=0;
290: $Apache::lonhomework::problemstatus=
291: &Apache::lonnet::EXT('resource.0.problemstatus');
292:
293: if (defined($ENV{'scantron.maxquest'})) {
294: $Apache::lonhomework::scantronmode=1;
295: }
296:
297: if ($target ne 'analyze') {
298: &initialize_storage();
299: if ($target eq 'web') {
300: &Apache::lonhomework::showhash(%Apache::lonhomework::history);
301: }
302: $Apache::lonhomework::type=&Apache::lonnet::EXT('resource.0.type');
303: &Apache::lonxml::debug("Found this to be of type :$Apache::lonhomework::type:");
304: }
305: if ($Apache::lonhomework::type eq '' ) {
306: my $uri=$ENV{'request.uri'};
307: if ($uri=~/\.(\w+)$/) {
308: $Apache::lonhomework::type=$1;
309: &Apache::lonxml::debug("Using type of $1");
310: } else {
311: $Apache::lonhomework::type='problem';
312: &Apache::lonxml::debug("Using default type, problem, :$uri:");
313: }
314: }
315:
316: #added vars to the scripting enviroment
317: my $expression='$external::part='.$Apache::inputtags::part.';';
318: &Apache::run::run($expression,$safeeval);
319: my $status;
320: my $accessmsg;
321:
322: #should get back a <html> or the neccesary stuff to start XML/MathML
323: my ($result,$head_tag_start,$body_tag_start,$form_tag_start)=
324: &page_start($target,$token,$tagstack,$parstack,$parser,$safeeval);
325: if ($target eq 'tex' and $ENV{'request.symb'} =~ m/\.page_/) {$result='';}
326:
327: if ($target eq 'analyze') { my $rndseed=&setup_rndseed($safeeval); }
328: if ($target eq 'web' || $target eq 'grade' || $target eq 'answer' ||
329: $target eq 'tex') {
330: #handle exam checkout
331: if ($Apache::lonhomework::type eq 'exam') {
332: my $token=
333: $Apache::lonhomework::history{"resource.0.outtoken"};
334: if (($ENV{'form.doescheckout'}) && (!$token)) {
335: $token=&Apache::lonxml::maketoken();
336: $Apache::lonhomework::history{"resource.0.outtoken"}=
337: $token;
338: }
339: $body_tag_start.=&Apache::lonxml::printtokenheader($target,$token);
340: }
341:
342: #handle rand seed in construction space
343: my $rndseed=&setup_rndseed($safeeval);
344: my ($symb)=&Apache::lonxml::whichuser();
345: if ($ENV{'request.state'} ne "construct" && $symb eq '') {
346: $form_tag_start.='<input type="hidden" name="rndseed" value="'.
347: $rndseed.'" />'.
348: '<input type="submit" name="resetdata"
349: value="New Problem Variation" />'.
350: '<input type="hidden" name="username"
351: value="'.$ENV{'form.username'}.'" />';
352: }
353: ($status,$accessmsg) = &Apache::lonhomework::check_access('0');
354: push (@Apache::inputtags::status,$status);
355: my $expression='$external::datestatus="'.$status.'";';
356: $expression.='$external::gradestatus="'.$Apache::lonhomework::history{"resource.0.solved"}.'";';
357: &Apache::run::run($expression,$safeeval);
358: &Apache::lonxml::debug("Got $status");
359: if (( $status eq 'CLOSED' ) ||
360: ( $status eq 'UNCHECKEDOUT') ||
361: ( $status eq 'BANNED') ||
362: ( $status eq 'UNAVAILABLE')) {
363: my $bodytext=&Apache::lonxml::get_all_text("/problem",$parser);
364: if ( $target eq "web" ) {
365: $result.= $head_tag_start.'</head>';
366: my $msg=$body_tag_start;
367: if ($status eq 'UNAVAILABLE') {
368: $result.='<h1>Unable to determine if this resource is open due to network problems. Please try again later.</h1>';
369: } else {
370: $result.='<h1>Not open to be viewed</h1>';
371: }
372: if ($status eq 'CLOSED') {
373: $msg.='The problem '.$accessmsg;
374: } elsif ($status eq 'UNCHECKEDOUT') {
375: $msg.=&checkout_msg;
376: }
377: $result.=$msg.'<br />';
378: } elsif ($target eq 'tex') {
379: $result.='\begin{document}\noindent \vskip 1 mm \begin{minipage}{\textwidth}\vskip 0 mm';
380: if ($status eq 'UNAVAILABLE') {
381: $result.='Unable to determine if this resource is open due to network problems. Please try again later.\vskip 0 mm ';
382: } else {
383: $result.="Problem is not open to be viewed. It $accessmsg \\vskip 0 mm ";
384: }
385: }
386: } elsif ($target eq 'web') {
387: my $name= &get_resource_name($parstack,$safeeval);
388: if ($status eq 'CAN_ANSWER') {
389: # create a page header and exit
390: $result.="$head_tag_start<title>$name</title></head>
391: $body_tag_start \n $form_tag_start".
392: '<input type="hidden" name="submitted" value="yes" />';
393: if ($ENV{'request.state'} eq "construct") {
394: $result.= &problem_web_to_edit_header($rndseed);
395: }
396: # if we are viewing someone else preserve that info
397: if (defined $ENV{'form.grade_symb'}) {
398: foreach my $field ('symb','courseid','domain','username') {
399: $result .= '<input type="hidden" name="grade_'.$field.
400: '" value="'.$ENV{"form.grade_$field"}.'" />'."\n";
401: }
402: }
403: } elsif ($status eq 'SHOW_ANSWER' || $status eq 'CANNOT_ANSWER'
404: || $status eq 'CLOSED' || $status eq 'UNAVALAILABLE') {
405: $result.=$head_tag_start.
406: "<title>$name</title></head>\n$body_tag_start\n";
407: }
408: } elsif ($target eq 'tex') {
409: my $startminipage = '';
410: if ($ENV{'form.problem_split'} ne 'yes') {
411: $startminipage = '\begin{minipage}{\textwidth}';
412: }
413: my $name= &Apache::lonxml::get_param('name',$parstack,$safeeval);
414: if ($name eq '') {
415: $name=&Apache::lonnet::EXT('resource.title');
416: if ($name eq 'con_lost') { $name = ''; }
417: }
418: $Apache::lonhomework::name=$name;
419: my $id = $Apache::inputtags::part;
420: my $weight = &Apache::lonnet::EXT("resource.$id.weight");
421: my $allkeys=&Apache::lonnet::metadata($ENV{'request.uri'},'keys');
422: my @allkeys = split /,/,$allkeys;
423: my $allow_print_points = 0;
424: foreach my $partial_key (@allkeys) {
425: if ($partial_key=~m/weight/) {
426: $allow_print_points++;
427: }
428: }
429: my $duedate = &Apache::lonnet::EXT("resource.$id.duedate");
430: $duedate = POSIX::strftime("%c",localtime($duedate));
431: my $temp_file;
432: my $filename = "/home/httpd/prtspool/$ENV{'user.name'}_$ENV{'user.domain'}_printout.due";
433: if (-e $filename) {
434: $temp_file = Apache::File->new($filename);
435: } else {
436: $temp_file = Apache::File->new('>>'.$filename);
437: }
438: my @due_file_content = <$temp_file>;
439: my $due_file_content = $due_file_content[$#due_file_content];
440: chomp $due_file_content;
441: my $name_of_resourse= &get_resource_name($parstack,$safeeval);
442: if ($due_file_content ne $duedate) {
443: $temp_file = Apache::File->new('>'.$filename);
444: print $temp_file "$duedate\n";
445: if (not $ENV{'request.symb'} =~ m/\.page_/) {
446: if(not $duedate=~m/1969/ and $Apache::lonhomework::type ne 'exam') {
447: $result .= '\begin{document} \typeout{STAMPOFPASSEDRESOURCESTART Resource <h2>"'.$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;
448: } else {
449: $result .= '\begin{document} \typeout{STAMPOFPASSEDRESOURCESTART Resource <h2>"'.$name_of_resourse.'"</h2> located in <br /><small><b>'.$ENV{'request.uri'}.'</b></small><br /> STAMPOFPASSEDRESOURCEEND} \noindent \vskip 1 mm \noindent'.$startminipage;
450: if ($Apache::lonhomework::type eq 'exam' and $allow_print_points==1) { $result .= '\fbox{\textit{'.$weight.' pt}}';}
451: }
452: } else {
453: $result .= '\vskip 1mm\textit{Due date: '.$duedate.'} \\\\\\\\';
454: }
455: } else {
456: if (not $ENV{'request.symb'} =~ m/\.page_/) {
457: $result .= '\begin{document} \typeout{STAMPOFPASSEDRESOURCESTART Resource <h2>"'.$name_of_resourse.'"</h2> located in <br /><small><b>'.$ENV{'request.uri'}.'</b></small><br /> STAMPOFPASSEDRESOURCEEND} \noindent \vskip 1 mm\noindent'.$startminipage;
458: if (($Apache::lonhomework::type eq 'exam') and ($allow_print_points==1)) { $result .= '\fbox{\textit{'.$weight.' pt}}';}
459: } else {
460: $result .= '\vskip 1mm \\\\\\\\';
461: }
462: }
463: }
464: } elsif ($target eq 'edit') {
465: $result.=$head_tag_start."</head>".$body_tag_start.$form_tag_start.
466: &problem_edit_header();
467: my $temp=&Apache::edit::insertlist($target,$token);
468: $result.=$temp;
469: } elsif ($target eq 'modified') {
470: $result=$token->[4];
471: $result.=&Apache::edit::handle_insert();
472: } else {
473: # page_start returned a starting result, delete it if we don't need it
474: $result = '';
475: }
476: return $result;
477: }
478:
479: sub end_problem {
480: my ($target,$token,$tagstack,$parstack,$parser,$safeeval)=@_;
481: my $result='';
482: my $status=$Apache::inputtags::status['-1'];
483: if ($target eq 'grade' || $target eq 'web' || $target eq 'answer' ||
484: $target eq 'tex') {
485: if ( $target eq 'grade' && $Apache::inputtags::part eq '0' &&
486: $status eq 'CAN_ANSWER' ) {
487: # if part is zero, no <part>s existed, so we need to the grading
488: &Apache::inputtags::grade;
489: } elsif ( ($target eq 'web' || $target eq 'tex') &&
490: $Apache::inputtags::part eq '0' &&
491: $status ne 'UNCHECKEDOUT') {
492: # if part is zero, no <part>s existed, so we need show the current
493: # grading status
494: my $gradestatus = &Apache::inputtags::gradestatus($Apache::inputtags::part,$target);
495: $result.= $gradestatus;
496: }
497: if (
498: (($target eq 'web') && ($ENV{'request.state'} ne 'construct')) ||
499: ($target eq 'answer') || ($target eq 'tex')
500: ) {
501: if ($status eq 'CAN_ANSWER') {
502: if ($target ne 'tex' &&
503: $ENV{'form.answer_output_mode'} ne 'tex') {
504: $result.="</form></body>\n";
505: }
506: } elsif ($status eq 'SHOW_ANSWER' || $status eq 'CANNOT_ANSWER' ||
507: $status eq 'UNCHECKEDOUT' ) {
508: if ($target ne 'tex') {
509: $result.="</body>\n";
510: }
511: }
512: if ($target eq 'web') {
513: $result.=&Apache::lonxml::xmlend();
514: } elsif ($target eq 'tex') {
515: my $endminipage = '';
516: if ($ENV{'form.problem_split'} ne 'yes') {
517: $endminipage = '\end{minipage}';
518: }
519: $result .= '\keephidden{ENDOFPROBLEM}\vskip 0.5mm\noindent\makebox[\textwidth/$number_of_columns][b]{\hrulefill}';
520: if (not $ENV{'request.symb'} =~ m/\.page_/) {
521: $result .= $endminipage.'\end{document} ';
522: } else {
523: $result .= '';
524: }
525: }
526: }
527: if ($target eq 'grade') {
528: &Apache::lonhomework::showhash(%Apache::lonhomework::results);
529: &finalize_storage();
530: }
531: if ($target eq 'answer' && ($ENV{'request.state'} eq 'construct')
532: && $ENV{'form.answer_output_mode'} ne 'tex') {
533: $result.='</html>'; # normally we get it from xmlend, but in CSTR
534: # we always show answer mode too.
535: }
536: } elsif ($target eq 'meta') {
537: if ($Apache::inputtags::part eq '0') {
538: @Apache::inputtags::response=();
539: $result=&Apache::response::mandatory_part_meta;
540: }
541: } elsif ($target eq 'edit') {
542: &Apache::lonxml::debug("in end_problem with $target, edit");
543: $result = &problem_edit_footer();
544: }
545:
546: if ($ENV{'request.state'} eq 'construct' && $target eq 'web') {
547: &Apache::inputtags::check_for_duplicate_ids();
548: }
549: undef(%Apache::lonhomework::history);
550: undef(%Apache::lonhomework::results);
551: undef($Apache::inputtags::part);
552: undef($Apache::lonhomework::parsing_a_problem);
553:
554: return $result;
555: }
556:
557:
558: sub start_library {
559: my ($target,$token,$tagstack,$parstack,$parser,$safeeval)=@_;
560: my ($result,$head_tag_start,$body_tag_start,$form_tag_start);
561:
562: if ($target eq 'edit') {
563: ($result,$head_tag_start,$body_tag_start,$form_tag_start)=
564: &page_start($target,$token,$tagstack,$parstack,$parser,$safeeval);
565: $result.=$head_tag_start."</head>".$body_tag_start.$form_tag_start.
566: &problem_edit_header();
567: my $temp=&Apache::edit::insertlist($target,$token);
568: $result.=$temp;
569: } elsif ($target eq 'modified') {
570: $result=$token->[4];
571: $result.=&Apache::edit::handle_insert();
572: } elsif ($target eq 'web' && $$tagstack[0] ne 'problem' &&
573: $ENV{'request.state'} eq "construct" ) {
574: ($result,$head_tag_start,$body_tag_start,$form_tag_start)=
575: &page_start($target,$token,$tagstack,$parstack,$parser,$safeeval);
576: my $name=&get_resource_name($parstack,$safeeval);
577: my $rndseed=&setup_rndseed($safeeval);
578: $result.="$head_tag_start<title>$name</title></head>
579: $body_tag_start \n $form_tag_start".
580: '<input type="hidden" name="submitted" value="yes" />';
581: $result.=&problem_web_to_edit_header($rndseed);
582: }
583: return $result;
584: }
585:
586: sub end_library {
587: my ($target,$token,$tagstack,$parstack,$parser,$safeeval)=@_;
588: my $result='';
589: if ($target eq 'edit') {
590: $result=&problem_edit_footer();
591: } elsif ($target eq 'web' && $$tagstack[0] ne 'problem' &&
592: $ENV{'request.state'} eq "construct") {
593: $result.='</form></body>'.&Apache::lonxml::xmlend();
594: }
595: return $result;
596: }
597:
598: sub start_block {
599: my ($target,$token,$tagstack,$parstack,$parser,$safeeval)=@_;
600:
601: my $result;
602:
603: if ($target eq 'web' || $target eq 'grade' || $target eq 'answer' ||
604: $target eq 'tex' || $target eq 'analyze') {
605: my $code = $token->[2]->{'condition'};
606: if ($code) {
607: if (!$Apache::lonxml::default_homework_loaded) {
608: &Apache::lonxml::default_homework_load($safeeval);
609: }
610: $result = &Apache::run::run($code,$safeeval);
611: &Apache::lonxml::debug("block :$code: returned :$result:");
612: } else {
613: $result='1';
614: }
615: if ( ! $result ) {
616: my $skip=&Apache::lonxml::get_all_text("/block",$parser);
617: &Apache::lonxml::debug("skipping ahead :$skip: $$parser[-1]");
618: }
619: $result='';
620: } elsif ($target eq 'edit') {
621: $result .=&Apache::edit::tag_start($target,$token);
622: $result .=&Apache::edit::text_arg('Test Condition:','condition',
623: $token,40);
624: $result .=&Apache::edit::end_row().&Apache::edit::start_spanning_row();
625: } elsif ($target eq 'modified') {
626: my $constructtag=&Apache::edit::get_new_args($token,$parstack,
627: $safeeval,'condition');
628: if ($constructtag) { $result = &Apache::edit::rebuild_tag($token); }
629: }
630: return $result;
631: }
632:
633: sub end_block {
634: my ($target,$token,$tagstack,$parstack,$parser,$safeeval)=@_;
635: my $result;
636: if ($target eq "edit") {
637: $result.= &Apache::edit::tag_end($target,$token,'');
638: }
639: return $result;
640: }
641:
642: sub start_languageblock {
643: my ($target,$token,$tagstack,$parstack,$parser,$safeeval)=@_;
644:
645: my $result;
646:
647: if ($target eq 'web' || $target eq 'grade' || $target eq 'answer' ||
648: $target eq 'tex' || $target eq 'analyze') {
649: my $include = $token->[2]->{'include'};
650: my $exclude = $token->[2]->{'exclude'};
651: my %languages=&Apache::loncommon::display_languages();
652: $result='1';
653: if ($include) {
654: $result='';
655: foreach (split(/\,/,$include)) {
656: if ($languages{$_}) { $result='1'; }
657: }
658: }
659: if ($exclude) {
660: foreach (split(/\,/,$exclude)) {
661: if ($languages{$_}) { $result='0'; }
662: }
663: }
664: if ( ! $result ) {
665: my $skip=&Apache::lonxml::get_all_text("/languageblock",$parser);
666: &Apache::lonxml::debug("skipping ahead :$skip: $$parser[-1]");
667: }
668: $result='';
669: } elsif ($target eq 'edit') {
670: $result .=&Apache::edit::tag_start($target,$token);
671: $result .=&Apache::edit::text_arg('Include Language:','include',
672: $token,40);
673: $result .=&Apache::edit::text_arg('Exclude Language:','exclude',
674: $token,40);
675: $result .=&Apache::edit::end_row().&Apache::edit::start_spanning_row();
676: } elsif ($target eq 'modified') {
677: my $constructtag=&Apache::edit::get_new_args($token,$parstack,
678: $safeeval,'include',
679: 'exclude');
680: if ($constructtag) { $result = &Apache::edit::rebuild_tag($token); }
681: }
682: return $result;
683: }
684:
685: sub end_languageblock {
686: my ($target,$token,$tagstack,$parstack,$parser,$safeeval)=@_;
687: my $result;
688: if ($target eq "edit") {
689: $result.= &Apache::edit::tag_end($target,$token,'');
690: }
691: return $result;
692: }
693:
694: sub start_instructorcomment {
695: my ($target,$token,$tagstack,$parstack,$parser,$safeeval)=@_;
696:
697: my $result;
698:
699: if ($target eq 'web' || $target eq 'grade' || $target eq 'answer' ||
700: $target eq 'tex' || $target eq 'analyze') {
701: $result=($ENV{'request.role'}=~/^(in|cc|au|ca|li)/);
702: if ( ! $result ) {
703: my $skip=&Apache::lonxml::get_all_text("/instructorcomment",$parser);
704: &Apache::lonxml::debug("skipping ahead :$skip: $$parser[-1]");
705: }
706: $result='';
707: } elsif ($target eq 'edit') {
708: $result .=&Apache::edit::tag_start($target,$token);
709: $result .=&Apache::edit::end_row().&Apache::edit::start_spanning_row();
710: }
711: return $result;
712: }
713:
714: sub end_instructorcomment {
715: my ($target,$token,$tagstack,$parstack,$parser,$safeeval)=@_;
716: my $result;
717: if ($target eq "edit") {
718: $result.= &Apache::edit::tag_end($target,$token,'');
719: }
720: return $result;
721: }
722:
723: sub start_while {
724: my ($target,$token,$tagstack,$parstack,$parser,$safeeval)=@_;
725:
726: my $result;
727: if ($target eq 'web' || $target eq 'grade' || $target eq 'answer' ||
728: $target eq 'tex' || $target eq 'analyze') {
729: my $code = $token->[2]->{'condition'};
730:
731: push( @Apache::structuretags::whileconds, $code);
732: if (!$Apache::lonxml::default_homework_loaded) {
733: &Apache::lonxml::default_homework_load($safeeval);
734: }
735: my $result = &Apache::run::run($code,$safeeval);
736: my $bodytext=&Apache::lonxml::get_all_text("/while",$parser);
737: push( @Apache::structuretags::whilebody, $bodytext);
738: push( @Apache::structuretags::whileline, $token->[5]);
739: &Apache::lonxml::debug("s code $code got -$result-");
740: if ( $result ) {
741: &Apache::lonxml::newparser($parser,\$bodytext);
742: }
743: } elsif ($target eq 'edit') {
744: $result .=&Apache::edit::tag_start($target,$token);
745: $result .=&Apache::edit::text_arg('Test Condition:','condition',
746: $token,40);
747: $result .=&Apache::edit::end_row().&Apache::edit::start_spanning_row();
748: } elsif ($target eq 'modified') {
749: my $constructtag=&Apache::edit::get_new_args($token,$parstack,
750: $safeeval,'condition');
751: if ($constructtag) { $result = &Apache::edit::rebuild_tag($token); }
752: }
753: return $result;
754: }
755:
756: sub end_while {
757: my ($target,$token,$tagstack,$parstack,$parser,$safeeval)=@_;
758: my $result;
759:
760: if ($target eq 'web' || $target eq 'grade' || $target eq 'answer' ||
761: $target eq 'tex' || $target eq 'analyze') {
762: my $code = pop(@Apache::structuretags::whileconds);
763: my $bodytext = pop(@Apache::structuretags::whilebody);
764: my $line = pop(@Apache::structuretags::whileline);
765: my $return = &Apache::run::run($code,$safeeval);
766: my $starttime=time;
767: my $error=0;
768: while ($return) {
769: if (time-$starttime >
770: $Apache::lonnet::perlvar{'lonScriptTimeout'}) {
771: $return = 0; $error=1; next;
772: }
773: $result.=&Apache::scripttag::xmlparse($bodytext);
774: $return = &Apache::run::run($code,$safeeval);
775: }
776: if ($error) {
777: &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>');
778: }
779: } elsif ($target eq "edit") {
780: $result.= &Apache::edit::tag_end($target,$token,'');
781: }
782: return $result;
783: }
784:
785: # <randomlist show="1">
786: # <tag1>..</tag1>
787: # <tag2>..</tag2>
788: # <tag3>..</tag3>
789: # ...
790: # </randomlist>
791: sub start_randomlist {
792: my ($target,$token,$tagstack,$parstack,$parser,$safeeval)=@_;
793: my $result;
794: if ($target eq 'answer' || $target eq 'grade' || $target eq 'web' ||
795: $target eq 'tex' || $target eq 'analyze') {
796: my $body= &Apache::lonxml::get_all_text("/randomlist",$parser);
797: my $b_parser= HTML::TokeParser->new(\$body);
798: my $b_tok;
799: my @randomlist;
800: my $list_item;
801: while($b_tok = $b_parser->get_token() ) {
802: if($b_tok->[0] eq 'S') { # start tag
803: # get content of the tag until matching end tag
804: # get all text upto the matching tag
805: # and push the content into @randomlist
806: $list_item = &Apache::lonxml::get_all_text('/'.$b_tok->[1],
807: $b_parser);
808: $list_item = "$b_tok->[4]"."$list_item"."</$b_tok->[1]>";
809: push(@randomlist,$list_item);
810: # print "<br /><b>START-TAG $b_tok->[1], $b_tok->[4],
811: # $list_item</b>";
812: }
813: if($b_tok->[0] eq 'T') { # text
814: # what to do with text in between tags?
815: # print "<b>TEXT $b_tok->[1]</b><br />";
816: }
817: # if($b_tok->[0] eq 'E') { # end tag, should not happen
818: # print "<b>END-TAG $b_tok->[1]</b><br />";
819: # }
820: }
821: my @idx_arr = (0 .. $#randomlist);
822: &Apache::structuretags::shuffle(\@idx_arr);
823: my $bodytext = '';
824: my $show=$#randomlist;
825: my $showarg=&Apache::lonxml::get_param('show',$parstack,$safeeval);
826: $showarg--;
827: if ( ($showarg >= 0) && ($showarg < $show) ) { $show = $showarg; }
828: for(0 .. $show) {
829: $bodytext .= "$randomlist[ $idx_arr[$_] ]";
830: }
831: &Apache::lonxml::newparser($parser,\$bodytext);
832: } elsif ($target eq 'edit' ) {
833: $result .=&Apache::edit::tag_start($target,$token);
834: $result .=&Apache::edit::text_arg('Maximum Tags to Show:','show',
835: $token,5);
836: $result .=&Apache::edit::end_row().&Apache::edit::start_spanning_row();
837: } elsif ($target eq 'modified' ) {
838: my $constructtag=&Apache::edit::get_new_args($token,$parstack,
839: $safeeval,'show');
840: if ($constructtag) { $result = &Apache::edit::rebuild_tag($token); }
841: }
842: return $result;
843: }
844:
845: sub shuffle {
846: my $a=shift;
847: my $i;
848: if (defined(@$a)) {
849: &Apache::response::setrandomnumber();
850: for($i=@$a;--$i;) {
851: my $j=int(&Math::Random::random_uniform() * ($i+1));
852: next if $i == $j;
853: @$a[$i,$j] = @$a[$j,$i];
854: }
855: }
856: }
857:
858: sub end_randomlist {
859: my ($target,$token,$tagstack,$parstack,$parser,$safeeval)=@_;
860: my $result;
861: if ($target eq 'edit' ) {
862: $result=&Apache::edit::tag_end($target,$token,
863: 'End Randomly Parsed Block');
864: }
865: return $result;
866: }
867:
868: sub start_part {
869: my ($target,$token,$tagstack,$parstack,$parser,$safeeval)=@_;
870: my $result='';
871: my $id= &Apache::lonxml::get_param('id',$parstack,$safeeval);
872: if ($id eq '') { $id = $Apache::lonxml::curdepth; }
873: $Apache::inputtags::part=$id;
874: push(@Apache::inputtags::partlist,$id);
875: @Apache::inputtags::response=();
876: @Apache::inputtags::previous=();
877: @Apache::inputtags::previous_version=();
878: $Apache::lonhomework::problemstatus=
879: &Apache::lonnet::EXT("resource.$id.problemstatus");
880: my $hidden=&Apache::loncommon::check_if_partid_hidden($Apache::inputtags::part);
881:
882: if ($target eq 'meta') {
883: return &Apache::response::mandatory_part_meta;
884: } elsif ($target eq 'web' || $target eq 'grade' ||
885: $target eq 'answer' || $target eq 'tex') {
886: if ($hidden) {
887: my $bodytext=&Apache::lonxml::get_all_text("/part",$parser);
888: } else {
889: my ($status,$accessmsg) = &Apache::lonhomework::check_access($id);
890: push (@Apache::inputtags::status,$status);
891: my $expression='$external::datestatus="'.$status.'";';
892: $expression.='$external::gradestatus="'.$Apache::lonhomework::history{"resource.$id.solved"}.'";';
893: &Apache::run::run($expression,$safeeval);
894: if ( $status eq 'CLOSED' ) {
895: my $bodytext=&Apache::lonxml::get_all_text("/part",$parser);
896: if ( $target eq "web" ) {
897: $result="<br />Part is not open to be viewed. It $accessmsg<br />";
898: } elsif ( $target eq 'tex' ) {
899: $result="\\end{minipage}\\vskip 0 mm Part is not open to be viewed. It $accessmsg \\\\\\begin{minipage}{\\textwidth}";
900: }
901: } else {
902: if ($target eq 'tex') {
903: $result.='\noindent \end{minipage}\vskip 0 mm \noindent \begin{minipage}{\textwidth}\noindent';
904: my $weight = &Apache::lonnet::EXT("resource.$id.weight");
905: if ($Apache::lonhomework::type eq 'exam') { $result .= '\fbox{\textit{'.$weight.' pt}}';}
906: }
907: }
908: }
909: } elsif ($target eq 'edit') {
910: $result.=&Apache::edit::tag_start($target,$token);
911: $result.=&Apache::edit::text_arg('Part ID:','id',$token).
912: &Apache::loncommon::help_open_topic("Part_Tag_Edit_Help").
913: &Apache::edit::end_row().&Apache::edit::start_spanning_row();
914: } elsif ($target eq 'modified') {
915: my $constructtag=&Apache::edit::get_new_args($token,$parstack,
916: $safeeval,'id');
917: if ($constructtag) {
918: $result = &Apache::edit::rebuild_tag($token);
919: $result.=&Apache::edit::handle_insert();
920: }
921: }
922: return $result;
923: }
924:
925: sub end_part {
926: my ($target,$token,$tagstack,$parstack,$parser,$safeeval)=@_;
927: &Apache::lonxml::debug("in end_part $target ");
928: my $status=$Apache::inputtags::status['-1'];
929: my $hidden=&Apache::loncommon::check_if_partid_hidden($Apache::inputtags::part);
930: my $result='';
931: if ( $target eq 'meta' ) {
932: $result='';
933: } elsif ( $target eq 'grade' && $status eq 'CAN_ANSWER' && !$hidden) {
934: $result=&Apache::inputtags::grade;
935: } elsif (($target eq 'web' || $target eq 'tex') && !$hidden ) {
936: my $gradestatus=&Apache::inputtags::gradestatus($Apache::inputtags::part,
937: $target);
938: if ($Apache::lonhomework::type eq 'exam') {$gradestatus='';}
939: $result=$gradestatus;
940: } elsif ($target eq 'edit') {
941: $result=&Apache::edit::end_table();
942: }
943: pop @Apache::inputtags::status;
944: $Apache::inputtags::part='';
945: return $result;
946: }
947:
948: sub start_preduedate {
949: my ($target,$token,$tagstack,$parstack,$parser,$safeeval)=@_;
950: if ($target eq 'web' || $target eq 'grade' || $target eq 'answer' || $target eq 'tex') {
951: if ($Apache::inputtags::status['-1'] ne 'CAN_ANSWER' &&
952: $Apache::inputtags::status['-1'] ne 'CANNOT_ANSWER' &&
953: $Apache::inputtags::status['-1'] ne 'SHOW_ANSWER') {
954: &Apache::lonxml::get_all_text("/preduedate",$parser);
955: }
956: }
957: return '';
958: }
959:
960: sub end_preduedate {
961: return '';
962: }
963:
964: sub start_postanswerdate {
965: my ($target,$token,$tagstack,$parstack,$parser,$safeeval)=@_;
966: if ($target eq 'web' || $target eq 'grade' || $target eq 'tex') {
967: if ($Apache::inputtags::status['-1'] ne 'SHOW_ANSWER') {
968: &Apache::lonxml::get_all_text("/postanswerdate",$parser);
969: }
970: } elsif ($target eq 'tex') {
971: return '\vskip 0 mm \noindent';
972: }
973: return '';
974: }
975:
976: sub end_postanswerdate {
977: return '';
978: }
979:
980: sub start_notsolved {
981: my ($target,$token,$tagstack,$parstack,$parser,$safeeval)=@_;
982: if ($target eq 'web' || $target eq 'grade' || $target eq 'answer' ||
983: $target eq 'tex') {
984: my $gradestatus=$Apache::lonhomework::history{"resource.$Apache::inputtags::part.solved"};
985: &Apache::lonxml::debug("not solved has :$gradestatus:");
986: if ($gradestatus =~ /^correct/) {
987: &Apache::lonxml::debug("skipping");
988: &Apache::lonxml::get_all_text("/notsolved",$parser);
989: }
990: }
991: return '';
992: }
993:
994: sub end_notsolved {
995: return '';
996: }
997:
998: sub start_solved {
999: my ($target,$token,$tagstack,$parstack,$parser,$safeeval)=@_;
1000: if ($target eq 'web' || $target eq 'grade' || $target eq 'answer' ||
1001: $target eq 'tex') {
1002: my $gradestatus=$Apache::lonhomework::history{"resource.$Apache::inputtags::part.solved"};
1003: if ($gradestatus !~ /^correct/) {
1004: &Apache::lonxml::get_all_text("/solved",$parser);
1005: }
1006: }
1007: return '';
1008: }
1009:
1010: sub end_solved {
1011: return '';
1012: }
1013:
1014: sub start_startouttext {
1015: my ($target,$token,$tagstack,$parstack,$parser,$safeeval)=@_;
1016: my @result=(''.'');
1017: if ($target eq 'edit' || $target eq 'modified' ) { @result=('','no'); }
1018: return (@result);
1019: }
1020:
1021: sub end_startouttext {
1022: my ($target,$token,$tagstack,$parstack,$parser,$safeeval)=@_;
1023: my $result='';
1024: my $text='';
1025:
1026: if ($target eq 'edit') {
1027: $text=&Apache::lonxml::get_all_text("endouttext",$parser);
1028: $result.=&Apache::edit::start_table($token)."<tr><td>Text Block</td>
1029: <td>Delete:".
1030: &Apache::edit::deletelist($target,$token)
1031: ."</td>
1032: <td>".
1033: &Apache::edit::insertlist($target,$token).
1034: &Apache::edit::end_row().
1035: &Apache::edit::start_spanning_row()."\n"
1036: .'<table><tr><td>'.
1037: &Apache::loncommon::help_open_topic("Greek_Symbols",
1038: 'Greek Symbols',
1039: undef,undef,600)
1040: .'</td><td>'.
1041: &Apache::loncommon::help_open_topic("Other_Symbols",
1042: 'Other Symbols',
1043: undef,undef,600)
1044: .'</td></tr></table>'.
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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