1: # The LearningOnline Network with CAPA
2: # definition of tags that give a structure to a document
3: #
4: # $Id: structuretags.pm,v 1.193 2003/07/07 07:32:16 www Exp $
5: #
6: # Copyright Michigan State University Board of Trustees
7: #
8: # This file is part of the LearningOnline Network with CAPA (LON-CAPA).
9: #
10: # LON-CAPA is free software; you can redistribute it and/or modify
11: # it under the terms of the GNU General Public License as published by
12: # the Free Software Foundation; either version 2 of the License, or
13: # (at your option) any later version.
14: #
15: # LON-CAPA is distributed in the hope that it will be useful,
16: # but WITHOUT ANY WARRANTY; without even the implied warranty of
17: # MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
18: # GNU General Public License for more details.
19: #
20: # You should have received a copy of the GNU General Public License
21: # along with LON-CAPA; if not, write to the Free Software
22: # Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA 02111-1307 USA
23: #
24: # /home/httpd/html/adm/gpl.txt
25: #
26: # http://www.lon-capa.org/
27: #
28: # 2/19 Guy
29: # 6/26/2001 fixed extra web display at end of <web></web> tags
30: # 8/17,8/18,8/20 Gerd Kortemeyer
31:
32:
33: package Apache::structuretags;
34:
35: use strict;
36: use Apache::lonnet;
37: use Apache::File();
38: 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: 'simpleeditbutton'));
43: }
44:
45: sub start_web {
46: my ($target,$token,$tagstack,$parstack,$parser,$safeeval)=@_;
47: if (!($target eq 'web' || $target eq 'edit' || $target eq 'modified' ||
48: $target eq 'answer' || $target eq 'grade' || $target eq 'meta' )) {
49: my $bodytext=&Apache::lonxml::get_all_text("/web",$parser);
50: }
51: return '';
52: }
53:
54: sub end_web {
55: return '';
56: }
57:
58: sub start_tex {
59: my ($target,$token,$tagstack,$parstack,$parser,$safeeval)=@_;
60: if (!($target eq 'tex' || $target eq 'edit' || $target eq 'modified' ||
61: $target eq 'answer' || $target eq 'grade' || $target eq 'meta' )) {
62: &Apache::lonxml::debug("tex 1");
63: my $bodytext=&Apache::lonxml::get_all_text("/tex",$parser);
64: }
65: return '';
66: }
67:
68: sub end_tex {
69: return '';
70: }
71:
72: sub page_start {
73: my ($target,$token,$tagstack,$parstack,$parser,$safeeval)=@_;
74: my %found;
75: foreach my $taginside ($tagstack) {
76: foreach my $taglookedfor ('html','body','form') {
77: if ($taginside =~ /^$taglookedfor$/i) {$found{$taglookedfor} = 1;}
78: }
79: }
80:
81: my $result;
82: my $head_tag_start;
83: if (!defined($found{'html'})) {
84: $result=&Apache::londefdef::start_html($target,$token,$tagstack,
85: $parstack,$parser,$safeeval);
86: $head_tag_start='<head>'.&Apache::lonmenu::registerurl(undef,$target);
87: }
88: my $body_tag_start;
89: if (!defined($found{'body'})) {
90: $body_tag_start='<body onLoad="'.&Apache::lonmenu::loadevents().'" '.
91: 'onUnload="'.&Apache::lonmenu::unloadevents().'" ';
92: my $background=&Apache::lonxml::get_param('background',$parstack,
93: $safeeval);
94: if ($background) {
95: $Apache::lonxml::extlinks[$#Apache::lonxml::extlinks+1]=
96: $background;
97: $body_tag_start.='background="'.$background.'" ';
98: } else {
99: my $bgcolor=&Apache::lonxml::get_param('bgcolor',$parstack,
100: $safeeval);
101: if ($bgcolor) {
102: $body_tag_start.='bgcolor="'.$bgcolor.'" ';
103: } else {
104: $body_tag_start.='bgcolor="#ffffff"';
105: }
106: }
107: $body_tag_start.='>'.&Apache::lonmenu::menubuttons(undef,$target,1);
108: if ($target eq 'web' && $ENV{'request.state'} ne 'construct') {
109: my ($symb,undef,undef,undef,$publicuser)=
110: &Apache::lonxml::whichuser();
111: if ($symb eq '' && !$publicuser) {
112: my $help = &Apache::loncommon::help_open_topic("Ambiguous_Reference");
113: $help="Browsing resource, all submissions are temporary.<br />";
114: $body_tag_start.=$help;
115: }
116: }
117: }
118: my $form_tag_start;
119: if (!defined($found{'form'})) {
120: $form_tag_start='<form name="lonhomework" method="POST" action="'.
121: $ENV{'request.uri'}.'">';
122: }
123: return ($result,$head_tag_start,$body_tag_start,$form_tag_start);
124: }
125:
126: #use Time::HiRes();
127: sub get_resource_name {
128: my ($parstack,$safeeval)=@_;
129: my $name=&Apache::lonnet::gettitle();
130: if ($name eq '') {
131: $name=&Apache::lonnet::EXT('resource.title');
132: if ($name eq 'con_lost') { $name = ''; }
133: }
134: $Apache::lonhomework::name=$name;
135: return $name;
136: }
137:
138: sub setup_rndseed {
139: my ($safeeval)=@_;
140: my $rndseed;
141: my ($symb)=&Apache::lonxml::whichuser();
142: if ($ENV{'request.state'} eq "construct" || $symb eq '') {
143: $rndseed=$ENV{'form.rndseed'};
144: if (!$rndseed) {
145: $rndseed=$Apache::lonhomework::history{'rndseed'};
146: if (!$rndseed) {
147: $rndseed=time;
148: $ENV{'form.rndseed'}=$rndseed;
149: }
150: }
151: if ($ENV{'form.resetdata'} eq 'New Problem Variation' ||
152: $ENV{'form.newrandomization'} eq 'New Randomization') {
153: srand(time);
154: $rndseed=int(rand(2100000000));
155: $ENV{'form.rndseed'}=$rndseed;
156: delete($ENV{'form.resetdata'});
157: delete($ENV{'form.newrandomization'});
158: }
159: if (defined($rndseed) && $rndseed ne int($rndseed)) {
160: $rndseed=join(',',&Math::Random::random_seed_from_phrase($rndseed));
161: }
162: &Apache::lonxml::debug("Setting rndseed to $rndseed");
163: &Apache::run::run('$external::randomseed='.$rndseed.';',$safeeval);
164: }
165: return $rndseed;
166: }
167:
168: sub problem_edit_header {
169: return '<input type="hidden" name="submitted" value="edit" />
170: <input type="hidden" name="problemmode" value="Edit" />
171: <input type="submit" name="problemmode" value="Discard Edits and View" />
172: <input type="submit" name="problemmode" value="EditXML" />
173: <input type="submit" name="Undo" value="undo" /> <hr />
174: <input type="submit" name="submit" value="Submit Changes and Edit" />
175: <input type="submit" name="submit" value="Submit Changes and View" /><br /><p> </p><table border="0"><tr><td bgcolor="#DDDDDD">
176: ';
177: }
178:
179: sub problem_edit_footer {
180: return '</td></tr></table><br /><input type="submit" name="submit" value="Submit Changes and Edit" />
181: <input type="submit" name="submit" value="Submit Changes and View" />';
182: }
183:
184: sub problem_web_to_edit_header {
185: my ($rndseed)=@_;
186: my $result.='<input type="hidden" name="problemmode" value="View" />
187: <input type="submit" name="problemmode" value="Edit" />
188: <input type="submit" name="problemmode" value="EditXML" />
189: <input type="submit" name="newrandomization" value="New Randomization" />
190: <input type="submit" name="resetdata" value="Reset Submissions" />
191: <nobr><input type="submit" name="changerandseed" value="Change Random Seed To:" />
192: <input type="text" name="rndseed" width="10" value="'.
193: $rndseed.'"
194: onChange="javascript:document.lonhomework.changerandseed.click()" /></nobr>
195: <input type="checkbox" name="showallfoils" ';
196: if (defined($ENV{'form.showallfoils'})) { $result.='checked="on"'; }
197: $result.= ' /> Show All Foils
198: <hr />';
199: my $numtoanalyze=$ENV{'form.numtoanalyze'};
200: if (!$numtoanalyze) { $numtoanalyze=20; }
201: $result.= '<input type="submit" name="problemmode" value="Calculate answers" /> for
202: <input type="text" name="numtoanalyze" value="'.
203: $numtoanalyze.'" size="5" /> versions of this problem.'.
204: &Apache::loncommon::help_open_topic("Analyze_Problem",
205: '',undef,undef,300).
206: '<hr />';
207: return $result;
208: }
209:
210: sub initialize_storage {
211: %Apache::lonhomework::results=();
212: %Apache::lonhomework::history=();
213: my ($symb,$courseid,$domain,$name) = &Apache::lonxml::whichuser();
214: if ($ENV{'request.state'} eq 'construct' || $symb eq '') {
215: %Apache::lonhomework::history=
216: &Apache::lonnet::tmprestore($ENV{'request.uri'},'',$domain,$name);
217: my ($temp)=keys %Apache::lonhomework::history ;
218: &Apache::lonxml::debug("Return message of $temp");
219: } else {
220: %Apache::lonhomework::history=
221: &Apache::lonnet::restore($symb,$courseid,$domain,$name);
222: }
223: #ignore error conditions
224: my ($temp)=keys %Apache::lonhomework::history ;
225: if ($temp =~ m/^error:.*/) { %Apache::lonhomework::history=(); }
226: }
227:
228: # -------------------------------------------------------------finalize_storage
229: # Stores away the result has to a student's environment
230: # checks form.grade_ for specific values, other wises stores
231: # to the running users environment
232: sub finalize_storage {
233: my $result;
234: my ($temp) = keys %Apache::lonhomework::results;
235: if ( $temp ne '' ) {
236: my ($symb,$courseid,$domain,$name) = &Apache::lonxml::whichuser();
237: if ($ENV{'request.state'} eq 'construct' || $symb eq '') {
238: $Apache::lonhomework::results{'rndseed'}=$ENV{'form.rndseed'};
239: $result=&Apache::lonnet::tmpstore(\%Apache::lonhomework::results,
240: $ENV{'request.uri'},'',$domain,$name);
241: &Apache::lonxml::debug('Construct Store return message:'.$result);
242: } else {
243: $result=&Apache::lonnet::cstore(\%Apache::lonhomework::results,
244: $symb,$courseid,$domain,$name);
245: &Apache::lonxml::debug('Store return message:'.$result);
246: }
247: }
248: return $result;
249: }
250:
251: sub checkout_msg {
252: return (<<ENDCHECKOUT);
253: <h2>The resource needs to be checked out</h2>
254: As a resource gets checked out, a unique timestamped ID is given to it, and a
255: permanent record is left in the system.<p />
256: <font color=red>
257: Checking out resources is subject to course policies, and may exclude future
258: credit even if done erroneously.<p />
259: </font>
260: <form name="checkout" method="POST" action="$ENV{'request.uri'}">
261: <input type="hidden" name="doescheckout" value="yes" />
262: <input type="button" name="checkoutbutton" value="Check out Exam for Viewing" onClick="javascript:if (confirm('Check out Exam?')) { document.checkout.submit(); }" />
263: </form>
264: ENDCHECKOUT
265: }
266:
267: sub start_problem {
268: my ($target,$token,$tagstack,$parstack,$parser,$safeeval)=@_;
269:
270: if ( $Apache::inputtags::part ne '' ||
271: $Apache::lonhomework::parsing_a_problem) {
272: &Apache::lonxml::error('Only one <problem> allowed in a .problem file');
273: #my $bodytext=&Apache::lonxml::get_all_text("/problem",$parser);
274: return '';
275: }
276:
277: $Apache::lonhomework::parsing_a_problem=1;
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'}.'" /> <br />';
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: $result.= &problem_web_to_edit_header($ENV{'form.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 (not $ENV{'form.problem_split'}=~/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: $ENV{'form.answer_output_mode'} ne 'tex') {
510: $result.="</body>\n";
511: }
512: }
513: if ($target eq 'web') {
514: $result.=&Apache::lonxml::xmlend();
515: } elsif ($target eq 'tex') {
516: my $endminipage = '';
517: if (not $ENV{'form.problem_split'}=~/yes/) {
518: $endminipage = '\end{minipage}';
519: }
520: $result .= '\keephidden{ENDOFPROBLEM}\vskip 0.5mm\noindent\makebox[\textwidth/$number_of_columns][b]{\hrulefill}';
521: if (not $ENV{'request.symb'} =~ m/\.page_/) {
522: $result .= $endminipage.'\end{document} ';
523: } else {
524: $result .= '';
525: }
526: }
527: }
528: if ($target eq 'grade') {
529: &Apache::lonhomework::showhash(%Apache::lonhomework::results);
530: &finalize_storage();
531: }
532: if ($target eq 'answer' && ($ENV{'request.state'} eq 'construct')
533: && $ENV{'form.answer_output_mode'} ne 'tex') {
534: $result.='</html>'; # normally we get it from xmlend, but in CSTR
535: # we always show answer mode too.
536: }
537: } elsif ($target eq 'meta') {
538: if ($Apache::inputtags::part eq '0') {
539: @Apache::inputtags::response=();
540: $result=&Apache::response::mandatory_part_meta;
541: }
542: } elsif ($target eq 'edit') {
543: &Apache::lonxml::debug("in end_problem with $target, edit");
544: $result = &problem_edit_footer();
545: }
546:
547: if ($ENV{'request.state'} eq 'construct' && $target eq 'web') {
548: &Apache::inputtags::check_for_duplicate_ids();
549: }
550: undef(%Apache::lonhomework::history);
551: undef(%Apache::lonhomework::results);
552: undef($Apache::inputtags::part);
553: undef($Apache::lonhomework::parsing_a_problem);
554:
555: return $result;
556: }
557:
558:
559: sub start_library {
560: my ($target,$token,$tagstack,$parstack,$parser,$safeeval)=@_;
561: my ($result,$head_tag_start,$body_tag_start,$form_tag_start);
562:
563: if ($target eq 'edit') {
564: ($result,$head_tag_start,$body_tag_start,$form_tag_start)=
565: &page_start($target,$token,$tagstack,$parstack,$parser,$safeeval);
566: $result.=$head_tag_start."</head>".$body_tag_start.$form_tag_start.
567: &problem_edit_header();
568: my $temp=&Apache::edit::insertlist($target,$token);
569: $result.=$temp;
570: } elsif ($target eq 'modified') {
571: $result=$token->[4];
572: $result.=&Apache::edit::handle_insert();
573: } elsif ($target eq 'web' && $$tagstack[0] ne 'problem' &&
574: $ENV{'request.state'} eq "construct" ) {
575: ($result,$head_tag_start,$body_tag_start,$form_tag_start)=
576: &page_start($target,$token,$tagstack,$parstack,$parser,$safeeval);
577: my $name=&get_resource_name($parstack,$safeeval);
578: my $rndseed=&setup_rndseed($safeeval);
579: $result.="$head_tag_start<title>$name</title></head>
580: $body_tag_start \n $form_tag_start".
581: '<input type="hidden" name="submitted" value="yes" />';
582: $result.=&problem_web_to_edit_header($rndseed);
583: }
584: return $result;
585: }
586:
587: sub end_library {
588: my ($target,$token,$tagstack,$parstack,$parser,$safeeval)=@_;
589: my $result='';
590: if ($target eq 'edit') {
591: $result=&problem_edit_footer();
592: } elsif ($target eq 'web' && $$tagstack[0] ne 'problem' &&
593: $ENV{'request.state'} eq "construct") {
594: $result.='</form></body>'.&Apache::lonxml::xmlend();
595: }
596: return $result;
597: }
598:
599: sub start_block {
600: my ($target,$token,$tagstack,$parstack,$parser,$safeeval)=@_;
601:
602: my $result;
603:
604: if ($target eq 'web' || $target eq 'grade' || $target eq 'answer' ||
605: $target eq 'tex' || $target eq 'analyze') {
606: my $code = $token->[2]->{'condition'};
607: if ($code) {
608: if (!$Apache::lonxml::default_homework_loaded) {
609: &Apache::lonxml::default_homework_load($safeeval);
610: }
611: $result = &Apache::run::run($code,$safeeval);
612: &Apache::lonxml::debug("block :$code: returned :$result:");
613: } else {
614: $result='1';
615: }
616: if ( ! $result ) {
617: my $skip=&Apache::lonxml::get_all_text("/block",$parser);
618: &Apache::lonxml::debug("skipping ahead :$skip: $$parser[-1]");
619: }
620: $result='';
621: } elsif ($target eq 'edit') {
622: $result .=&Apache::edit::tag_start($target,$token);
623: $result .=&Apache::edit::text_arg('Test Condition:','condition',
624: $token,40);
625: $result .=&Apache::edit::end_row().&Apache::edit::start_spanning_row();
626: } elsif ($target eq 'modified') {
627: my $constructtag=&Apache::edit::get_new_args($token,$parstack,
628: $safeeval,'condition');
629: if ($constructtag) { $result = &Apache::edit::rebuild_tag($token); }
630: }
631: return $result;
632: }
633:
634: sub end_block {
635: my ($target,$token,$tagstack,$parstack,$parser,$safeeval)=@_;
636: my $result;
637: if ($target eq "edit") {
638: $result.= &Apache::edit::tag_end($target,$token,'');
639: }
640: return $result;
641: }
642:
643: sub start_languageblock {
644: my ($target,$token,$tagstack,$parstack,$parser,$safeeval)=@_;
645:
646: my $result;
647:
648: if ($target eq 'web' || $target eq 'grade' || $target eq 'answer' ||
649: $target eq 'tex' || $target eq 'analyze') {
650: &Apache::lonxml::startredirection();
651: } elsif ($target eq 'edit') {
652: $result .=&Apache::edit::tag_start($target,$token);
653: $result .=&Apache::edit::text_arg('Include Language:','include',
654: $token,40);
655: $result .=&Apache::edit::text_arg('Exclude Language:','exclude',
656: $token,40);
657: $result .=&Apache::edit::end_row().&Apache::edit::start_spanning_row();
658: } elsif ($target eq 'modified') {
659: my $constructtag=&Apache::edit::get_new_args($token,$parstack,
660: $safeeval,'include',
661: 'exclude');
662: if ($constructtag) { $result = &Apache::edit::rebuild_tag($token); }
663: }
664: return $result;
665: }
666:
667: sub end_languageblock {
668: my ($target,$token,$tagstack,$parstack,$parser,$safeeval)=@_;
669: my $result;
670:
671: if ($target eq 'web' || $target eq 'grade' || $target eq 'answer' ||
672: $target eq 'tex' || $target eq 'analyze') {
673: my $text=&Apache::lonxml::endredirection();
674: my $include= &Apache::lonxml::get_param('include',$parstack,$safeeval);
675: my $exclude= &Apache::lonxml::get_param('exclude',$parstack,$safeeval);
676: my %languages=&Apache::loncommon::display_languages();
677: $result='1';
678: if ($include) {
679: $result='';
680: foreach (split(/\,/,$include)) {
681: if ($languages{$_}) { $result='1'; }
682: }
683: }
684: if ($exclude) {
685: foreach (split(/\,/,$exclude)) {
686: if ($languages{$_}) { $result='0'; }
687: }
688: }
689: if ( ! $result ) {
690: $result='';
691: } else {
692: $result=$text;
693: }
694: } elsif ($target eq "edit") {
695: $result.= &Apache::edit::tag_end($target,$token,'');
696: }
697: return $result;
698: }
699:
700: sub start_instructorcomment {
701: my ($target,$token,$tagstack,$parstack,$parser,$safeeval)=@_;
702:
703: my $result;
704:
705: if ($target eq 'web' || $target eq 'grade' || $target eq 'answer' ||
706: $target eq 'tex' || $target eq 'analyze') {
707: $result=($ENV{'request.role'}=~/^(in|cc|au|ca|li)/);
708: if ( ! $result ) {
709: my $skip=&Apache::lonxml::get_all_text("/instructorcomment",$parser);
710: &Apache::lonxml::debug("skipping ahead :$skip: $$parser[-1]");
711: }
712: $result='';
713: } elsif ($target eq 'edit') {
714: $result .=&Apache::edit::tag_start($target,$token);
715: $result .=&Apache::edit::end_row().&Apache::edit::start_spanning_row();
716: }
717: return $result;
718: }
719:
720: sub end_instructorcomment {
721: my ($target,$token,$tagstack,$parstack,$parser,$safeeval)=@_;
722: my $result;
723: if ($target eq "edit") {
724: $result.= &Apache::edit::tag_end($target,$token,'');
725: }
726: return $result;
727: }
728:
729: sub start_while {
730: my ($target,$token,$tagstack,$parstack,$parser,$safeeval)=@_;
731:
732: my $result;
733: if ($target eq 'web' || $target eq 'grade' || $target eq 'answer' ||
734: $target eq 'tex' || $target eq 'analyze') {
735: my $code = $token->[2]->{'condition'};
736:
737: push( @Apache::structuretags::whileconds, $code);
738: if (!$Apache::lonxml::default_homework_loaded) {
739: &Apache::lonxml::default_homework_load($safeeval);
740: }
741: my $result = &Apache::run::run($code,$safeeval);
742: my $bodytext=&Apache::lonxml::get_all_text("/while",$parser);
743: push( @Apache::structuretags::whilebody, $bodytext);
744: push( @Apache::structuretags::whileline, $token->[5]);
745: &Apache::lonxml::debug("s code $code got -$result-");
746: if ( $result ) {
747: &Apache::lonxml::newparser($parser,\$bodytext);
748: }
749: } elsif ($target eq 'edit') {
750: $result .=&Apache::edit::tag_start($target,$token);
751: $result .=&Apache::edit::text_arg('Test Condition:','condition',
752: $token,40);
753: $result .=&Apache::edit::end_row().&Apache::edit::start_spanning_row();
754: } elsif ($target eq 'modified') {
755: my $constructtag=&Apache::edit::get_new_args($token,$parstack,
756: $safeeval,'condition');
757: if ($constructtag) { $result = &Apache::edit::rebuild_tag($token); }
758: }
759: return $result;
760: }
761:
762: sub end_while {
763: my ($target,$token,$tagstack,$parstack,$parser,$safeeval)=@_;
764: my $result;
765:
766: if ($target eq 'web' || $target eq 'grade' || $target eq 'answer' ||
767: $target eq 'tex' || $target eq 'analyze') {
768: my $code = pop(@Apache::structuretags::whileconds);
769: my $bodytext = pop(@Apache::structuretags::whilebody);
770: my $line = pop(@Apache::structuretags::whileline);
771: my $return = &Apache::run::run($code,$safeeval);
772: my $starttime=time;
773: my $error=0;
774: while ($return) {
775: if (time-$starttime >
776: $Apache::lonnet::perlvar{'lonScriptTimeout'}) {
777: $return = 0; $error=1; next;
778: }
779: $result.=&Apache::scripttag::xmlparse($bodytext);
780: $return = &Apache::run::run($code,$safeeval);
781: }
782: if ($error) {
783: &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 '.$line.'</pre>');
784: }
785: } elsif ($target eq "edit") {
786: $result.= &Apache::edit::tag_end($target,$token,'');
787: }
788: return $result;
789: }
790:
791: # <randomlist show="1">
792: # <tag1>..</tag1>
793: # <tag2>..</tag2>
794: # <tag3>..</tag3>
795: # ...
796: # </randomlist>
797: sub start_randomlist {
798: my ($target,$token,$tagstack,$parstack,$parser,$safeeval)=@_;
799: my $result;
800: if ($target eq 'answer' || $target eq 'grade' || $target eq 'web' ||
801: $target eq 'tex' || $target eq 'analyze') {
802: my $body= &Apache::lonxml::get_all_text("/randomlist",$parser);
803: my $b_parser= HTML::TokeParser->new(\$body);
804: my $b_tok;
805: my @randomlist;
806: my $list_item;
807: while($b_tok = $b_parser->get_token() ) {
808: if($b_tok->[0] eq 'S') { # start tag
809: # get content of the tag until matching end tag
810: # get all text upto the matching tag
811: # and push the content into @randomlist
812: $list_item = &Apache::lonxml::get_all_text('/'.$b_tok->[1],
813: $b_parser);
814: $list_item = "$b_tok->[4]"."$list_item"."</$b_tok->[1]>";
815: push(@randomlist,$list_item);
816: # print "<br /><b>START-TAG $b_tok->[1], $b_tok->[4],
817: # $list_item</b>";
818: }
819: if($b_tok->[0] eq 'T') { # text
820: # what to do with text in between tags?
821: # print "<b>TEXT $b_tok->[1]</b><br />";
822: }
823: # if($b_tok->[0] eq 'E') { # end tag, should not happen
824: # print "<b>END-TAG $b_tok->[1]</b><br />";
825: # }
826: }
827: my @idx_arr = (0 .. $#randomlist);
828: &Apache::structuretags::shuffle(\@idx_arr);
829: my $bodytext = '';
830: my $show=$#randomlist;
831: my $showarg=&Apache::lonxml::get_param('show',$parstack,$safeeval);
832: $showarg--;
833: if ( ($showarg >= 0) && ($showarg < $show) ) { $show = $showarg; }
834: for(0 .. $show) {
835: $bodytext .= "$randomlist[ $idx_arr[$_] ]";
836: }
837: &Apache::lonxml::newparser($parser,\$bodytext);
838: } elsif ($target eq 'edit' ) {
839: $result .=&Apache::edit::tag_start($target,$token);
840: $result .=&Apache::edit::text_arg('Maximum Tags to Show:','show',
841: $token,5);
842: $result .=&Apache::edit::end_row().&Apache::edit::start_spanning_row();
843: } elsif ($target eq 'modified' ) {
844: my $constructtag=&Apache::edit::get_new_args($token,$parstack,
845: $safeeval,'show');
846: if ($constructtag) { $result = &Apache::edit::rebuild_tag($token); }
847: }
848: return $result;
849: }
850:
851: sub shuffle {
852: my $a=shift;
853: my $i;
854: if (defined(@$a)) {
855: &Apache::response::setrandomnumber();
856: for($i=@$a;--$i;) {
857: my $j=int(&Math::Random::random_uniform() * ($i+1));
858: next if $i == $j;
859: @$a[$i,$j] = @$a[$j,$i];
860: }
861: }
862: }
863:
864: sub end_randomlist {
865: my ($target,$token,$tagstack,$parstack,$parser,$safeeval)=@_;
866: my $result;
867: if ($target eq 'edit' ) {
868: $result=&Apache::edit::tag_end($target,$token,
869: 'End Randomly Parsed Block');
870: }
871: return $result;
872: }
873:
874: sub start_part {
875: my ($target,$token,$tagstack,$parstack,$parser,$safeeval)=@_;
876: my $result='';
877: my $id= &Apache::lonxml::get_param('id',$parstack,$safeeval);
878: if ($id eq '') { $id = $Apache::lonxml::curdepth; }
879: $Apache::inputtags::part=$id;
880: push(@Apache::inputtags::partlist,$id);
881: @Apache::inputtags::response=();
882: @Apache::inputtags::previous=();
883: @Apache::inputtags::previous_version=();
884: $Apache::lonhomework::problemstatus=
885: &Apache::lonnet::EXT("resource.$id.problemstatus");
886: my $hidden=&Apache::loncommon::check_if_partid_hidden($Apache::inputtags::part);
887:
888: if ($target eq 'meta') {
889: return &Apache::response::mandatory_part_meta;
890: } elsif ($target eq 'web' || $target eq 'grade' ||
891: $target eq 'answer' || $target eq 'tex') {
892: if ($hidden) {
893: my $bodytext=&Apache::lonxml::get_all_text("/part",$parser);
894: } else {
895: my ($status,$accessmsg) = &Apache::lonhomework::check_access($id);
896: push (@Apache::inputtags::status,$status);
897: my $expression='$external::datestatus="'.$status.'";';
898: $expression.='$external::gradestatus="'.$Apache::lonhomework::history{"resource.$id.solved"}.'";';
899: &Apache::run::run($expression,$safeeval);
900: if ( $status eq 'CLOSED' ) {
901: my $bodytext=&Apache::lonxml::get_all_text("/part",$parser);
902: if ( $target eq "web" ) {
903: $result="<br />Part is not open to be viewed. It $accessmsg<br />";
904: } elsif ( $target eq 'tex' ) {
905: $result="\\end{minipage}\\vskip 0 mm Part is not open to be viewed. It $accessmsg \\\\\\begin{minipage}{\\textwidth}";
906: }
907: } else {
908: if ($target eq 'tex') {
909: $result.='\noindent \end{minipage}\vskip 0 mm \noindent \begin{minipage}{\textwidth}\noindent';
910: my $weight = &Apache::lonnet::EXT("resource.$id.weight");
911: if ($Apache::lonhomework::type eq 'exam') { $result .= '\fbox{\textit{'.$weight.' pt}}';}
912: }
913: }
914: }
915: } elsif ($target eq 'edit') {
916: $result.=&Apache::edit::tag_start($target,$token);
917: $result.=&Apache::edit::text_arg('Part ID:','id',$token).
918: &Apache::loncommon::help_open_topic("Part_Tag_Edit_Help").
919: &Apache::edit::end_row().&Apache::edit::start_spanning_row();
920: } elsif ($target eq 'modified') {
921: my $constructtag=&Apache::edit::get_new_args($token,$parstack,
922: $safeeval,'id');
923: if ($constructtag) {
924: $result = &Apache::edit::rebuild_tag($token);
925: $result.=&Apache::edit::handle_insert();
926: }
927: }
928: return $result;
929: }
930:
931: sub end_part {
932: my ($target,$token,$tagstack,$parstack,$parser,$safeeval)=@_;
933: &Apache::lonxml::debug("in end_part $target ");
934: my $status=$Apache::inputtags::status['-1'];
935: my $hidden=&Apache::loncommon::check_if_partid_hidden($Apache::inputtags::part);
936: my $result='';
937: if ( $target eq 'meta' ) {
938: $result='';
939: } elsif ( $target eq 'grade' && $status eq 'CAN_ANSWER' && !$hidden) {
940: $result=&Apache::inputtags::grade;
941: } elsif (($target eq 'web' || $target eq 'tex') && !$hidden ) {
942: my $gradestatus=&Apache::inputtags::gradestatus($Apache::inputtags::part,
943: $target);
944: if ($Apache::lonhomework::type eq 'exam') {$gradestatus='';}
945: $result=$gradestatus;
946: } elsif ($target eq 'edit') {
947: $result=&Apache::edit::end_table();
948: }
949: pop @Apache::inputtags::status;
950: $Apache::inputtags::part='';
951: return $result;
952: }
953:
954: sub start_preduedate {
955: my ($target,$token,$tagstack,$parstack,$parser,$safeeval)=@_;
956: if ($target eq 'web' || $target eq 'grade' || $target eq 'answer' || $target eq 'tex') {
957: if ($Apache::inputtags::status['-1'] ne 'CAN_ANSWER' &&
958: $Apache::inputtags::status['-1'] ne 'CANNOT_ANSWER' &&
959: $Apache::inputtags::status['-1'] ne 'SHOW_ANSWER') {
960: &Apache::lonxml::get_all_text("/preduedate",$parser);
961: }
962: }
963: return '';
964: }
965:
966: sub end_preduedate {
967: return '';
968: }
969:
970: sub start_postanswerdate {
971: my ($target,$token,$tagstack,$parstack,$parser,$safeeval)=@_;
972: if ($target eq 'web' || $target eq 'grade' || $target eq 'tex') {
973: if ($Apache::inputtags::status['-1'] ne 'SHOW_ANSWER') {
974: &Apache::lonxml::get_all_text("/postanswerdate",$parser);
975: }
976: } elsif ($target eq 'tex') {
977: return '\vskip 0 mm \noindent';
978: }
979: return '';
980: }
981:
982: sub end_postanswerdate {
983: return '';
984: }
985:
986: sub start_notsolved {
987: my ($target,$token,$tagstack,$parstack,$parser,$safeeval)=@_;
988: if ($target eq 'web' || $target eq 'grade' || $target eq 'answer' ||
989: $target eq 'tex') {
990: my $gradestatus=$Apache::lonhomework::history{"resource.$Apache::inputtags::part.solved"};
991: &Apache::lonxml::debug("not solved has :$gradestatus:");
992: if ($gradestatus =~ /^correct/) {
993: &Apache::lonxml::debug("skipping");
994: &Apache::lonxml::get_all_text("/notsolved",$parser);
995: }
996: }
997: return '';
998: }
999:
1000: sub end_notsolved {
1001: return '';
1002: }
1003:
1004: sub start_solved {
1005: my ($target,$token,$tagstack,$parstack,$parser,$safeeval)=@_;
1006: if ($target eq 'web' || $target eq 'grade' || $target eq 'answer' ||
1007: $target eq 'tex') {
1008: my $gradestatus=$Apache::lonhomework::history{"resource.$Apache::inputtags::part.solved"};
1009: if ($gradestatus !~ /^correct/) {
1010: &Apache::lonxml::get_all_text("/solved",$parser);
1011: }
1012: }
1013: return '';
1014: }
1015:
1016: sub end_solved {
1017: return '';
1018: }
1019:
1020: sub start_startouttext {
1021: my ($target,$token,$tagstack,$parstack,$parser,$safeeval)=@_;
1022: my @result=(''.'');
1023: if ($target eq 'edit' || $target eq 'modified' ) { @result=('','no'); }
1024: return (@result);
1025: }
1026:
1027: sub end_startouttext {
1028: my ($target,$token,$tagstack,$parstack,$parser,$safeeval)=@_;
1029: my $result='';
1030: my $text='';
1031:
1032: if ($target eq 'edit') {
1033: $text=&Apache::lonxml::get_all_text("endouttext",$parser);
1034: $result.=&Apache::edit::start_table($token)."<tr><td>Text Block</td>
1035: <td>Delete:".
1036: &Apache::edit::deletelist($target,$token)
1037: ."</td>
1038: <td>".
1039: &Apache::edit::insertlist($target,$token).
1040: &Apache::edit::end_row().
1041: &Apache::edit::start_spanning_row()."\n"
1042: . &Apache::loncommon::helpLatexCheatsheet () .
1043: &Apache::edit::editfield($token->[1],$text,"",80,4);
1044: }
1045: if ($target eq 'modified') {
1046: $text=&Apache::lonxml::get_all_text("endouttext",$parser);
1047: $result='<startouttext />'.&Apache::edit::modifiedfield();
1048: }
1049: if ($target eq 'tex') {
1050: $result .= '\noindent ';
1051: }
1052: return $result;
1053: }
1054:
1055: sub start_endouttext {
1056: my ($target,$token,$tagstack,$parstack,$parser,$safeeval)=@_;
1057: my $result='';
1058: if ($target eq "edit" ) { $result="</td></tr>".&Apache::edit::end_table()."\n"; }
1059: if ($target eq "modified") {
1060: $result='<endouttext />'.
1061: &Apache::edit::handle_insertafter('startouttext'); }
1062: return $result;
1063: }
1064:
1065: sub end_endouttext {
1066: my ($target,$token,$tagstack,$parstack,$parser,$safeeval)=@_;
1067: my @result=('','');
1068: if ($target eq "edit" || $target eq 'modified') { @result=('','no'); }
1069: return (@result);
1070: }
1071:
1072: sub delete_startouttext {
1073: my ($target,$token,$tagstack,$parstack,$parser,$safeeval)=@_;
1074: # my $text=&Apache::lonxml::get_all_text("endouttext",$parser);
1075: my $text=$$parser['-1']->get_text("/endouttext");
1076: my $ntoken=$$parser['-1']->get_token();
1077: &Apache::lonxml::debug("Deleting :$text: and :$ntoken->[0]:$ntoken->[1]:$ntoken->[2]: for startouttext");
1078: &Apache::lonxml::end_tag($tagstack,$parstack,$ntoken);
1079: # Deleting 2 parallel tag pairs, but we need the numbers later to look like
1080: # they did the last time round
1081: &Apache::lonxml::increasedepth($ntoken);
1082: &Apache::lonxml::decreasedepth($ntoken);
1083: return 1;
1084: }
1085:
1086: sub start_simpleeditbutton {
1087: my ($target,$token,$tagstack,$parstack,$parser,$safeeval)=@_;
1088: my $result='';
1089: if (($target eq 'web') &&
1090: (&Apache::lonnet::allowed('srm',$ENV{'request.course.id'}))) {
1091: my $url=$ENV{'REQUEST_URI'};
1092: $url=~s/\?.*$//;
1093: $result='<a href="'.$url.'/smpedit">Edit</a><br />';
1094: }
1095: return $result;
1096: }
1097:
1098: sub end_simpleeditbutton {
1099: return '';
1100: }
1101:
1102: 1;
1103: __END__
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