1: # The LearningOnline Network with CAPA
2: # definition of tags that give a structure to a document
3: #
4: # $Id: structuretags.pm,v 1.186 2003/06/18 22:12:34 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: if ( $Apache::inputtags::part ne '' ||
270: $Apache::lonhomework::parsing_a_problem) {
271: &Apache::lonxml::error('Only one <problem> allowed in a .problem file');
272: #my $bodytext=&Apache::lonxml::get_all_text("/problem",$parser);
273: return '';
274: }
275:
276: $Apache::lonhomework::parsing_a_problem=1;
277: #initialize globals
278: $Apache::inputtags::part='0';
279: @Apache::inputtags::partlist=('0');
280: @Apache::inputtags::responselist = ();
281: @Apache::inputtags::importlist = ();
282: @Apache::inputtags::previous=();
283: @Apache::inputtags::previous_version=();
284: $Apache::structuretags::printanswer='No';
285: @Apache::structuretags::whileconds=();
286: @Apache::structuretags::whilebody=();
287: @Apache::structuretags::whileline=();
288: $Apache::lonhomework::scantronmode=0;
289: $Apache::lonhomework::problemstatus=
290: &Apache::lonnet::EXT('resource.0.problemstatus');
291:
292: if (defined($ENV{'scantron.maxquest'})) {
293: $Apache::lonhomework::scantronmode=1;
294: }
295:
296: if ($target ne 'analyze') {
297: &initialize_storage();
298: if ($target eq 'web') {
299: &Apache::lonhomework::showhash(%Apache::lonhomework::history);
300: }
301: $Apache::lonhomework::type=&Apache::lonnet::EXT('resource.0.type');
302: &Apache::lonxml::debug("Found this to be of type :$Apache::lonhomework::type:");
303: }
304: if ($Apache::lonhomework::type eq '' ) {
305: my $uri=$ENV{'request.uri'};
306: if ($uri=~/\.(\w+)$/) {
307: $Apache::lonhomework::type=$1;
308: &Apache::lonxml::debug("Using type of $1");
309: } else {
310: $Apache::lonhomework::type='problem';
311: &Apache::lonxml::debug("Using default type, problem, :$uri:");
312: }
313: }
314:
315: #added vars to the scripting enviroment
316: my $expression='$external::part='.$Apache::inputtags::part.';';
317: &Apache::run::run($expression,$safeeval);
318: my $status;
319: my $accessmsg;
320:
321: #should get back a <html> or the neccesary stuff to start XML/MathML
322: my ($result,$head_tag_start,$body_tag_start,$form_tag_start)=
323: &page_start($target,$token,$tagstack,$parstack,$parser,$safeeval);
324: if ($target eq 'tex' and $ENV{'request.symb'} =~ m/\.page_/) {$result='';}
325:
326: if ($target eq 'analyze') { my $rndseed=&setup_rndseed($safeeval); }
327: if ($target eq 'web' || $target eq 'grade' || $target eq 'answer' ||
328: $target eq 'tex') {
329: #handle exam checkout
330: if ($Apache::lonhomework::type eq 'exam') {
331: my $token=
332: $Apache::lonhomework::history{"resource.0.outtoken"};
333: if (($ENV{'form.doescheckout'}) && (!$token)) {
334: $token=&Apache::lonxml::maketoken();
335: $Apache::lonhomework::history{"resource.0.outtoken"}=
336: $token;
337: }
338: $body_tag_start.=&Apache::lonxml::printtokenheader($target,$token);
339: }
340:
341: #handle rand seed in construction space
342: my $rndseed=&setup_rndseed($safeeval);
343: my ($symb)=&Apache::lonxml::whichuser();
344: if ($ENV{'request.state'} ne "construct" && $symb eq '') {
345: $form_tag_start.='<input type="hidden" name="rndseed" value="'.
346: $rndseed.'" />'.
347: '<input type="submit" name="resetdata"
348: value="New Problem Variation" />'.
349: '<input type="hidden" name="username"
350: value="'.$ENV{'form.username'}.'" /> <br />';
351: }
352: ($status,$accessmsg) = &Apache::lonhomework::check_access('0');
353: push (@Apache::inputtags::status,$status);
354: my $expression='$external::datestatus="'.$status.'";';
355: $expression.='$external::gradestatus="'.$Apache::lonhomework::history{"resource.0.solved"}.'";';
356: &Apache::run::run($expression,$safeeval);
357: &Apache::lonxml::debug("Got $status");
358: if (( $status eq 'CLOSED' ) ||
359: ( $status eq 'UNCHECKEDOUT') ||
360: ( $status eq 'BANNED') ||
361: ( $status eq 'UNAVAILABLE')) {
362: my $bodytext=&Apache::lonxml::get_all_text("/problem",$parser);
363: if ( $target eq "web" ) {
364: $result.= $head_tag_start.'</head>';
365: my $msg=$body_tag_start;
366: if ($status eq 'UNAVAILABLE') {
367: $result.='<h1>Unable to determine if this resource is open due to network problems. Please try again later.</h1>';
368: } else {
369: $result.='<h1>Not open to be viewed</h1>';
370: }
371: if ($status eq 'CLOSED') {
372: $msg.='The problem '.$accessmsg;
373: } elsif ($status eq 'UNCHECKEDOUT') {
374: $msg.=&checkout_msg;
375: }
376: $result.=$msg.'<br />';
377: } elsif ($target eq 'tex') {
378: $result.='\begin{document}\noindent \vskip 1 mm \begin{minipage}{\textwidth}\vskip 0 mm';
379: if ($status eq 'UNAVAILABLE') {
380: $result.='Unable to determine if this resource is open due to network problems. Please try again later.\vskip 0 mm ';
381: } else {
382: $result.="Problem is not open to be viewed. It $accessmsg \\vskip 0 mm ";
383: }
384: }
385: } elsif ($target eq 'web') {
386: my $name= &get_resource_name($parstack,$safeeval);
387: if ($status eq 'CAN_ANSWER') {
388: # create a page header and exit
389: $result.="$head_tag_start<title>$name</title></head>
390: $body_tag_start \n $form_tag_start".
391: '<input type="hidden" name="submitted" value="yes" />';
392: if ($ENV{'request.state'} eq "construct") {
393: $result.= &problem_web_to_edit_header($rndseed);
394: }
395: # if we are viewing someone else preserve that info
396: if (defined $ENV{'form.grade_symb'}) {
397: foreach my $field ('symb','courseid','domain','username') {
398: $result .= '<input type="hidden" name="grade_'.$field.
399: '" value="'.$ENV{"form.grade_$field"}.'" />'."\n";
400: }
401: }
402: } elsif ($status eq 'SHOW_ANSWER' || $status eq 'CANNOT_ANSWER'
403: || $status eq 'CLOSED' || $status eq 'UNAVALAILABLE') {
404: $result.=$head_tag_start.
405: "<title>$name</title></head>\n$body_tag_start\n";
406: }
407: } elsif ($target eq 'tex') {
408: my $startminipage = '';
409: if ($ENV{'form.problem_split'} ne 'yes') {
410: $startminipage = '\begin{minipage}{\textwidth}';
411: }
412: my $name= &Apache::lonxml::get_param('name',$parstack,$safeeval);
413: if ($name eq '') {
414: $name=&Apache::lonnet::EXT('resource.title');
415: if ($name eq 'con_lost') { $name = ''; }
416: }
417: $Apache::lonhomework::name=$name;
418: my $id = $Apache::inputtags::part;
419: my $weight = &Apache::lonnet::EXT("resource.$id.weight");
420: my $allkeys=&Apache::lonnet::metadata($ENV{'request.uri'},'keys');
421: my @allkeys = split /,/,$allkeys;
422: my $allow_print_points = 0;
423: foreach my $partial_key (@allkeys) {
424: if ($partial_key=~m/weight/) {
425: $allow_print_points++;
426: }
427: }
428: my $duedate = &Apache::lonnet::EXT("resource.$id.duedate");
429: $duedate = POSIX::strftime("%c",localtime($duedate));
430: my $temp_file;
431: my $filename = "/home/httpd/prtspool/$ENV{'user.name'}_$ENV{'user.domain'}_printout.due";
432: if (-e $filename) {
433: $temp_file = Apache::File->new($filename);
434: } else {
435: $temp_file = Apache::File->new('>>'.$filename);
436: }
437: my @due_file_content = <$temp_file>;
438: my $due_file_content = $due_file_content[$#due_file_content];
439: chomp $due_file_content;
440: my $name_of_resourse= &get_resource_name($parstack,$safeeval);
441: if ($due_file_content ne $duedate) {
442: $temp_file = Apache::File->new('>'.$filename);
443: print $temp_file "$duedate\n";
444: if (not $ENV{'request.symb'} =~ m/\.page_/) {
445: if(not $duedate=~m/1969/ and $Apache::lonhomework::type ne 'exam') {
446: $result .= '\begin{document} \typeout{STAMPOFPASSEDRESOURCESTART Resource <h2>"'.$name_of_resourse.'"</h2> located in <br /><small><b>'.$ENV{'request.uri'}.'</b></small><br /> STAMPOFPASSEDRESOURCEEND} \noindent\textit{Due date: '.$duedate.'} \vskip 1 mm\noindent '.$startminipage;
447: } else {
448: $result .= '\begin{document} \typeout{STAMPOFPASSEDRESOURCESTART Resource <h2>"'.$name_of_resourse.'"</h2> located in <br /><small><b>'.$ENV{'request.uri'}.'</b></small><br /> STAMPOFPASSEDRESOURCEEND} \noindent \vskip 1 mm \noindent'.$startminipage;
449: if ($Apache::lonhomework::type eq 'exam' and $allow_print_points==1) { $result .= '\fbox{\textit{'.$weight.' pt}}';}
450: }
451: } else {
452: $result .= '\vskip 1mm\textit{Due date: '.$duedate.'} \\\\\\\\';
453: }
454: } else {
455: if (not $ENV{'request.symb'} =~ m/\.page_/) {
456: $result .= '\begin{document} \typeout{STAMPOFPASSEDRESOURCESTART Resource <h2>"'.$name_of_resourse.'"</h2> located in <br /><small><b>'.$ENV{'request.uri'}.'</b></small><br /> STAMPOFPASSEDRESOURCEEND} \noindent \vskip 1 mm\noindent'.$startminipage;
457: if (($Apache::lonhomework::type eq 'exam') and ($allow_print_points==1)) { $result .= '\fbox{\textit{'.$weight.' pt}}';}
458: } else {
459: $result .= '\vskip 1mm \\\\\\\\';
460: }
461: }
462: }
463: } elsif ($target eq 'edit') {
464: $result.=$head_tag_start."</head>".$body_tag_start.$form_tag_start.
465: &problem_edit_header();
466: my $temp=&Apache::edit::insertlist($target,$token);
467: $result.=$temp;
468: } elsif ($target eq 'modified') {
469: $result=$token->[4];
470: $result.=&Apache::edit::handle_insert();
471: } else {
472: # page_start returned a starting result, delete it if we don't need it
473: $result = '';
474: }
475: return $result;
476: }
477:
478: sub end_problem {
479: my ($target,$token,$tagstack,$parstack,$parser,$safeeval)=@_;
480: my $result='';
481: my $status=$Apache::inputtags::status['-1'];
482: if ($target eq 'grade' || $target eq 'web' || $target eq 'answer' ||
483: $target eq 'tex') {
484: if ( $target eq 'grade' && $Apache::inputtags::part eq '0' &&
485: $status eq 'CAN_ANSWER' ) {
486: # if part is zero, no <part>s existed, so we need to the grading
487: &Apache::inputtags::grade;
488: } elsif ( ($target eq 'web' || $target eq 'tex') &&
489: $Apache::inputtags::part eq '0' &&
490: $status ne 'UNCHECKEDOUT') {
491: # if part is zero, no <part>s existed, so we need show the current
492: # grading status
493: my $gradestatus = &Apache::inputtags::gradestatus($Apache::inputtags::part,$target);
494: $result.= $gradestatus;
495: }
496: if (
497: (($target eq 'web') && ($ENV{'request.state'} ne 'construct')) ||
498: ($target eq 'answer') || ($target eq 'tex')
499: ) {
500: if ($status eq 'CAN_ANSWER') {
501: if ($target ne 'tex' &&
502: $ENV{'form.answer_output_mode'} ne 'tex') {
503: $result.="</form></body>\n";
504: }
505: } elsif ($status eq 'SHOW_ANSWER' || $status eq 'CANNOT_ANSWER' ||
506: $status eq 'UNCHECKEDOUT' ) {
507: if ($target ne 'tex') {
508: $result.="</body>\n";
509: }
510: }
511: if ($target eq 'web') {
512: $result.=&Apache::lonxml::xmlend();
513: } elsif ($target eq 'tex') {
514: my $endminipage = '';
515: if ($ENV{'form.problem_split'} ne 'yes') {
516: $endminipage = '\end{minipage}';
517: }
518: $result .= '\keephidden{ENDOFPROBLEM}\vskip 0.5mm\noindent\makebox[\textwidth/$number_of_columns][b]{\hrulefill}';
519: if (not $ENV{'request.symb'} =~ m/\.page_/) {
520: $result .= $endminipage.'\end{document} ';
521: } else {
522: $result .= '';
523: }
524: }
525: }
526: if ($target eq 'grade') {
527: &Apache::lonhomework::showhash(%Apache::lonhomework::results);
528: &finalize_storage();
529: }
530: if ($target eq 'answer' && ($ENV{'request.state'} eq 'construct')
531: && $ENV{'form.answer_output_mode'} ne 'tex') {
532: $result.='</html>'; # normally we get it from xmlend, but in CSTR
533: # we always show answer mode too.
534: }
535: } elsif ($target eq 'meta') {
536: if ($Apache::inputtags::part eq '0') {
537: @Apache::inputtags::response=();
538: $result=&Apache::response::mandatory_part_meta;
539: }
540: } elsif ($target eq 'edit') {
541: &Apache::lonxml::debug("in end_problem with $target, edit");
542: $result = &problem_edit_footer();
543: }
544:
545: if ($ENV{'request.state'} eq 'construct' && $target eq 'web') {
546: &Apache::inputtags::check_for_duplicate_ids();
547: }
548: undef(%Apache::lonhomework::history);
549: undef(%Apache::lonhomework::results);
550: undef($Apache::inputtags::part);
551: undef($Apache::lonhomework::parsing_a_problem);
552:
553: return $result;
554: }
555:
556:
557: sub start_library {
558: my ($target,$token,$tagstack,$parstack,$parser,$safeeval)=@_;
559: my ($result,$head_tag_start,$body_tag_start,$form_tag_start);
560:
561: if ($target eq 'edit') {
562: ($result,$head_tag_start,$body_tag_start,$form_tag_start)=
563: &page_start($target,$token,$tagstack,$parstack,$parser,$safeeval);
564: $result.=$head_tag_start."</head>".$body_tag_start.$form_tag_start.
565: &problem_edit_header();
566: my $temp=&Apache::edit::insertlist($target,$token);
567: $result.=$temp;
568: } elsif ($target eq 'modified') {
569: $result=$token->[4];
570: $result.=&Apache::edit::handle_insert();
571: } elsif ($target eq 'web' && $$tagstack[0] ne 'problem' &&
572: $ENV{'request.state'} eq "construct" ) {
573: ($result,$head_tag_start,$body_tag_start,$form_tag_start)=
574: &page_start($target,$token,$tagstack,$parstack,$parser,$safeeval);
575: my $name=&get_resource_name($parstack,$safeeval);
576: my $rndseed=&setup_rndseed($safeeval);
577: $result.="$head_tag_start<title>$name</title></head>
578: $body_tag_start \n $form_tag_start".
579: '<input type="hidden" name="submitted" value="yes" />';
580: $result.=&problem_web_to_edit_header($rndseed);
581: }
582: return $result;
583: }
584:
585: sub end_library {
586: my ($target,$token,$tagstack,$parstack,$parser,$safeeval)=@_;
587: my $result='';
588: if ($target eq 'edit') {
589: $result=&problem_edit_footer();
590: } elsif ($target eq 'web' && $$tagstack[0] ne 'problem' &&
591: $ENV{'request.state'} eq "construct") {
592: $result.='</form></body>'.&Apache::lonxml::xmlend();
593: }
594: return $result;
595: }
596:
597: sub start_block {
598: my ($target,$token,$tagstack,$parstack,$parser,$safeeval)=@_;
599:
600: my $result;
601:
602: if ($target eq 'web' || $target eq 'grade' || $target eq 'answer' ||
603: $target eq 'tex' || $target eq 'analyze') {
604: my $code = $token->[2]->{'condition'};
605: if ($code) {
606: if (!$Apache::lonxml::default_homework_loaded) {
607: &Apache::lonxml::default_homework_load($safeeval);
608: }
609: $result = &Apache::run::run($code,$safeeval);
610: &Apache::lonxml::debug("block :$code: returned :$result:");
611: } else {
612: $result='1';
613: }
614: if ( ! $result ) {
615: my $skip=&Apache::lonxml::get_all_text("/block",$parser);
616: &Apache::lonxml::debug("skipping ahead :$skip: $$parser[-1]");
617: }
618: $result='';
619: } elsif ($target eq 'edit') {
620: $result .=&Apache::edit::tag_start($target,$token);
621: $result .=&Apache::edit::text_arg('Test Condition:','condition',
622: $token,40);
623: $result .=&Apache::edit::end_row().&Apache::edit::start_spanning_row();
624: } elsif ($target eq 'modified') {
625: my $constructtag=&Apache::edit::get_new_args($token,$parstack,
626: $safeeval,'condition');
627: if ($constructtag) { $result = &Apache::edit::rebuild_tag($token); }
628: }
629: return $result;
630: }
631:
632: sub end_block {
633: my ($target,$token,$tagstack,$parstack,$parser,$safeeval)=@_;
634: my $result;
635: if ($target eq "edit") {
636: $result.= &Apache::edit::tag_end($target,$token,'');
637: }
638: return $result;
639: }
640:
641: sub start_languageblock {
642: my ($target,$token,$tagstack,$parstack,$parser,$safeeval)=@_;
643:
644: my $result;
645:
646: if ($target eq 'web' || $target eq 'grade' || $target eq 'answer' ||
647: $target eq 'tex' || $target eq 'analyze') {
648: &Apache::lonxml::startredirection();
649: } elsif ($target eq 'edit') {
650: $result .=&Apache::edit::tag_start($target,$token);
651: $result .=&Apache::edit::text_arg('Include Language:','include',
652: $token,40);
653: $result .=&Apache::edit::text_arg('Exclude Language:','exclude',
654: $token,40);
655: $result .=&Apache::edit::end_row().&Apache::edit::start_spanning_row();
656: } elsif ($target eq 'modified') {
657: my $constructtag=&Apache::edit::get_new_args($token,$parstack,
658: $safeeval,'include',
659: 'exclude');
660: if ($constructtag) { $result = &Apache::edit::rebuild_tag($token); }
661: }
662: return $result;
663: }
664:
665: sub end_languageblock {
666: my ($target,$token,$tagstack,$parstack,$parser,$safeeval)=@_;
667: my $result;
668:
669: if ($target eq 'web' || $target eq 'grade' || $target eq 'answer' ||
670: $target eq 'tex' || $target eq 'analyze') {
671: my $text=&Apache::lonxml::endredirection();
672: my $include= &Apache::lonxml::get_param('include',$parstack,$safeeval);
673: my $exclude= &Apache::lonxml::get_param('exclude',$parstack,$safeeval);
674: my %languages=&Apache::loncommon::display_languages();
675: $result='1';
676: if ($include) {
677: $result='';
678: foreach (split(/\,/,$include)) {
679: if ($languages{$_}) { $result='1'; }
680: }
681: }
682: if ($exclude) {
683: foreach (split(/\,/,$exclude)) {
684: if ($languages{$_}) { $result='0'; }
685: }
686: }
687: if ( ! $result ) {
688: $result='';
689: } else {
690: $result=$text;
691: }
692: } elsif ($target eq "edit") {
693: $result.= &Apache::edit::tag_end($target,$token,'');
694: }
695: return $result;
696: }
697:
698: sub start_instructorcomment {
699: my ($target,$token,$tagstack,$parstack,$parser,$safeeval)=@_;
700:
701: my $result;
702:
703: if ($target eq 'web' || $target eq 'grade' || $target eq 'answer' ||
704: $target eq 'tex' || $target eq 'analyze') {
705: $result=($ENV{'request.role'}=~/^(in|cc|au|ca|li)/);
706: if ( ! $result ) {
707: my $skip=&Apache::lonxml::get_all_text("/instructorcomment",$parser);
708: &Apache::lonxml::debug("skipping ahead :$skip: $$parser[-1]");
709: }
710: $result='';
711: } elsif ($target eq 'edit') {
712: $result .=&Apache::edit::tag_start($target,$token);
713: $result .=&Apache::edit::end_row().&Apache::edit::start_spanning_row();
714: }
715: return $result;
716: }
717:
718: sub end_instructorcomment {
719: my ($target,$token,$tagstack,$parstack,$parser,$safeeval)=@_;
720: my $result;
721: if ($target eq "edit") {
722: $result.= &Apache::edit::tag_end($target,$token,'');
723: }
724: return $result;
725: }
726:
727: sub start_while {
728: my ($target,$token,$tagstack,$parstack,$parser,$safeeval)=@_;
729:
730: my $result;
731: if ($target eq 'web' || $target eq 'grade' || $target eq 'answer' ||
732: $target eq 'tex' || $target eq 'analyze') {
733: my $code = $token->[2]->{'condition'};
734:
735: push( @Apache::structuretags::whileconds, $code);
736: if (!$Apache::lonxml::default_homework_loaded) {
737: &Apache::lonxml::default_homework_load($safeeval);
738: }
739: my $result = &Apache::run::run($code,$safeeval);
740: my $bodytext=&Apache::lonxml::get_all_text("/while",$parser);
741: push( @Apache::structuretags::whilebody, $bodytext);
742: push( @Apache::structuretags::whileline, $token->[5]);
743: &Apache::lonxml::debug("s code $code got -$result-");
744: if ( $result ) {
745: &Apache::lonxml::newparser($parser,\$bodytext);
746: }
747: } elsif ($target eq 'edit') {
748: $result .=&Apache::edit::tag_start($target,$token);
749: $result .=&Apache::edit::text_arg('Test Condition:','condition',
750: $token,40);
751: $result .=&Apache::edit::end_row().&Apache::edit::start_spanning_row();
752: } elsif ($target eq 'modified') {
753: my $constructtag=&Apache::edit::get_new_args($token,$parstack,
754: $safeeval,'condition');
755: if ($constructtag) { $result = &Apache::edit::rebuild_tag($token); }
756: }
757: return $result;
758: }
759:
760: sub end_while {
761: my ($target,$token,$tagstack,$parstack,$parser,$safeeval)=@_;
762: my $result;
763:
764: if ($target eq 'web' || $target eq 'grade' || $target eq 'answer' ||
765: $target eq 'tex' || $target eq 'analyze') {
766: my $code = pop(@Apache::structuretags::whileconds);
767: my $bodytext = pop(@Apache::structuretags::whilebody);
768: my $line = pop(@Apache::structuretags::whileline);
769: my $return = &Apache::run::run($code,$safeeval);
770: my $starttime=time;
771: my $error=0;
772: while ($return) {
773: if (time-$starttime >
774: $Apache::lonnet::perlvar{'lonScriptTimeout'}) {
775: $return = 0; $error=1; next;
776: }
777: $result.=&Apache::scripttag::xmlparse($bodytext);
778: $return = &Apache::run::run($code,$safeeval);
779: }
780: if ($error) {
781: &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 '.$line.'</pre>');
782: }
783: } elsif ($target eq "edit") {
784: $result.= &Apache::edit::tag_end($target,$token,'');
785: }
786: return $result;
787: }
788:
789: # <randomlist show="1">
790: # <tag1>..</tag1>
791: # <tag2>..</tag2>
792: # <tag3>..</tag3>
793: # ...
794: # </randomlist>
795: sub start_randomlist {
796: my ($target,$token,$tagstack,$parstack,$parser,$safeeval)=@_;
797: my $result;
798: if ($target eq 'answer' || $target eq 'grade' || $target eq 'web' ||
799: $target eq 'tex' || $target eq 'analyze') {
800: my $body= &Apache::lonxml::get_all_text("/randomlist",$parser);
801: my $b_parser= HTML::TokeParser->new(\$body);
802: my $b_tok;
803: my @randomlist;
804: my $list_item;
805: while($b_tok = $b_parser->get_token() ) {
806: if($b_tok->[0] eq 'S') { # start tag
807: # get content of the tag until matching end tag
808: # get all text upto the matching tag
809: # and push the content into @randomlist
810: $list_item = &Apache::lonxml::get_all_text('/'.$b_tok->[1],
811: $b_parser);
812: $list_item = "$b_tok->[4]"."$list_item"."</$b_tok->[1]>";
813: push(@randomlist,$list_item);
814: # print "<br /><b>START-TAG $b_tok->[1], $b_tok->[4],
815: # $list_item</b>";
816: }
817: if($b_tok->[0] eq 'T') { # text
818: # what to do with text in between tags?
819: # print "<b>TEXT $b_tok->[1]</b><br />";
820: }
821: # if($b_tok->[0] eq 'E') { # end tag, should not happen
822: # print "<b>END-TAG $b_tok->[1]</b><br />";
823: # }
824: }
825: my @idx_arr = (0 .. $#randomlist);
826: &Apache::structuretags::shuffle(\@idx_arr);
827: my $bodytext = '';
828: my $show=$#randomlist;
829: my $showarg=&Apache::lonxml::get_param('show',$parstack,$safeeval);
830: $showarg--;
831: if ( ($showarg >= 0) && ($showarg < $show) ) { $show = $showarg; }
832: for(0 .. $show) {
833: $bodytext .= "$randomlist[ $idx_arr[$_] ]";
834: }
835: &Apache::lonxml::newparser($parser,\$bodytext);
836: } elsif ($target eq 'edit' ) {
837: $result .=&Apache::edit::tag_start($target,$token);
838: $result .=&Apache::edit::text_arg('Maximum Tags to Show:','show',
839: $token,5);
840: $result .=&Apache::edit::end_row().&Apache::edit::start_spanning_row();
841: } elsif ($target eq 'modified' ) {
842: my $constructtag=&Apache::edit::get_new_args($token,$parstack,
843: $safeeval,'show');
844: if ($constructtag) { $result = &Apache::edit::rebuild_tag($token); }
845: }
846: return $result;
847: }
848:
849: sub shuffle {
850: my $a=shift;
851: my $i;
852: if (defined(@$a)) {
853: &Apache::response::setrandomnumber();
854: for($i=@$a;--$i;) {
855: my $j=int(&Math::Random::random_uniform() * ($i+1));
856: next if $i == $j;
857: @$a[$i,$j] = @$a[$j,$i];
858: }
859: }
860: }
861:
862: sub end_randomlist {
863: my ($target,$token,$tagstack,$parstack,$parser,$safeeval)=@_;
864: my $result;
865: if ($target eq 'edit' ) {
866: $result=&Apache::edit::tag_end($target,$token,
867: 'End Randomly Parsed Block');
868: }
869: return $result;
870: }
871:
872: sub start_part {
873: my ($target,$token,$tagstack,$parstack,$parser,$safeeval)=@_;
874: my $result='';
875: my $id= &Apache::lonxml::get_param('id',$parstack,$safeeval);
876: if ($id eq '') { $id = $Apache::lonxml::curdepth; }
877: $Apache::inputtags::part=$id;
878: push(@Apache::inputtags::partlist,$id);
879: @Apache::inputtags::response=();
880: @Apache::inputtags::previous=();
881: @Apache::inputtags::previous_version=();
882: $Apache::lonhomework::problemstatus=
883: &Apache::lonnet::EXT("resource.$id.problemstatus");
884: my $hidden=&Apache::loncommon::check_if_partid_hidden($Apache::inputtags::part);
885:
886: if ($target eq 'meta') {
887: return &Apache::response::mandatory_part_meta;
888: } elsif ($target eq 'web' || $target eq 'grade' ||
889: $target eq 'answer' || $target eq 'tex') {
890: if ($hidden) {
891: my $bodytext=&Apache::lonxml::get_all_text("/part",$parser);
892: } else {
893: my ($status,$accessmsg) = &Apache::lonhomework::check_access($id);
894: push (@Apache::inputtags::status,$status);
895: my $expression='$external::datestatus="'.$status.'";';
896: $expression.='$external::gradestatus="'.$Apache::lonhomework::history{"resource.$id.solved"}.'";';
897: &Apache::run::run($expression,$safeeval);
898: if ( $status eq 'CLOSED' ) {
899: my $bodytext=&Apache::lonxml::get_all_text("/part",$parser);
900: if ( $target eq "web" ) {
901: $result="<br />Part is not open to be viewed. It $accessmsg<br />";
902: } elsif ( $target eq 'tex' ) {
903: $result="\\end{minipage}\\vskip 0 mm Part is not open to be viewed. It $accessmsg \\\\\\begin{minipage}{\\textwidth}";
904: }
905: } else {
906: if ($target eq 'tex') {
907: $result.='\noindent \end{minipage}\vskip 0 mm \noindent \begin{minipage}{\textwidth}\noindent';
908: my $weight = &Apache::lonnet::EXT("resource.$id.weight");
909: if ($Apache::lonhomework::type eq 'exam') { $result .= '\fbox{\textit{'.$weight.' pt}}';}
910: }
911: }
912: }
913: } elsif ($target eq 'edit') {
914: $result.=&Apache::edit::tag_start($target,$token);
915: $result.=&Apache::edit::text_arg('Part ID:','id',$token).
916: &Apache::loncommon::help_open_topic("Part_Tag_Edit_Help").
917: &Apache::edit::end_row().&Apache::edit::start_spanning_row();
918: } elsif ($target eq 'modified') {
919: my $constructtag=&Apache::edit::get_new_args($token,$parstack,
920: $safeeval,'id');
921: if ($constructtag) {
922: $result = &Apache::edit::rebuild_tag($token);
923: $result.=&Apache::edit::handle_insert();
924: }
925: }
926: return $result;
927: }
928:
929: sub end_part {
930: my ($target,$token,$tagstack,$parstack,$parser,$safeeval)=@_;
931: &Apache::lonxml::debug("in end_part $target ");
932: my $status=$Apache::inputtags::status['-1'];
933: my $hidden=&Apache::loncommon::check_if_partid_hidden($Apache::inputtags::part);
934: my $result='';
935: if ( $target eq 'meta' ) {
936: $result='';
937: } elsif ( $target eq 'grade' && $status eq 'CAN_ANSWER' && !$hidden) {
938: $result=&Apache::inputtags::grade;
939: } elsif (($target eq 'web' || $target eq 'tex') && !$hidden ) {
940: my $gradestatus=&Apache::inputtags::gradestatus($Apache::inputtags::part,
941: $target);
942: if ($Apache::lonhomework::type eq 'exam') {$gradestatus='';}
943: $result=$gradestatus;
944: } elsif ($target eq 'edit') {
945: $result=&Apache::edit::end_table();
946: }
947: pop @Apache::inputtags::status;
948: $Apache::inputtags::part='';
949: return $result;
950: }
951:
952: sub start_preduedate {
953: my ($target,$token,$tagstack,$parstack,$parser,$safeeval)=@_;
954: if ($target eq 'web' || $target eq 'grade' || $target eq 'answer' || $target eq 'tex') {
955: if ($Apache::inputtags::status['-1'] ne 'CAN_ANSWER' &&
956: $Apache::inputtags::status['-1'] ne 'CANNOT_ANSWER' &&
957: $Apache::inputtags::status['-1'] ne 'SHOW_ANSWER') {
958: &Apache::lonxml::get_all_text("/preduedate",$parser);
959: }
960: }
961: return '';
962: }
963:
964: sub end_preduedate {
965: return '';
966: }
967:
968: sub start_postanswerdate {
969: my ($target,$token,$tagstack,$parstack,$parser,$safeeval)=@_;
970: if ($target eq 'web' || $target eq 'grade' || $target eq 'tex') {
971: if ($Apache::inputtags::status['-1'] ne 'SHOW_ANSWER') {
972: &Apache::lonxml::get_all_text("/postanswerdate",$parser);
973: }
974: } elsif ($target eq 'tex') {
975: return '\vskip 0 mm \noindent';
976: }
977: return '';
978: }
979:
980: sub end_postanswerdate {
981: return '';
982: }
983:
984: sub start_notsolved {
985: my ($target,$token,$tagstack,$parstack,$parser,$safeeval)=@_;
986: if ($target eq 'web' || $target eq 'grade' || $target eq 'answer' ||
987: $target eq 'tex') {
988: my $gradestatus=$Apache::lonhomework::history{"resource.$Apache::inputtags::part.solved"};
989: &Apache::lonxml::debug("not solved has :$gradestatus:");
990: if ($gradestatus =~ /^correct/) {
991: &Apache::lonxml::debug("skipping");
992: &Apache::lonxml::get_all_text("/notsolved",$parser);
993: }
994: }
995: return '';
996: }
997:
998: sub end_notsolved {
999: return '';
1000: }
1001:
1002: sub start_solved {
1003: my ($target,$token,$tagstack,$parstack,$parser,$safeeval)=@_;
1004: if ($target eq 'web' || $target eq 'grade' || $target eq 'answer' ||
1005: $target eq 'tex') {
1006: my $gradestatus=$Apache::lonhomework::history{"resource.$Apache::inputtags::part.solved"};
1007: if ($gradestatus !~ /^correct/) {
1008: &Apache::lonxml::get_all_text("/solved",$parser);
1009: }
1010: }
1011: return '';
1012: }
1013:
1014: sub end_solved {
1015: return '';
1016: }
1017:
1018: sub start_startouttext {
1019: my ($target,$token,$tagstack,$parstack,$parser,$safeeval)=@_;
1020: my @result=(''.'');
1021: if ($target eq 'edit' || $target eq 'modified' ) { @result=('','no'); }
1022: return (@result);
1023: }
1024:
1025: sub end_startouttext {
1026: my ($target,$token,$tagstack,$parstack,$parser,$safeeval)=@_;
1027: my $result='';
1028: my $text='';
1029:
1030: if ($target eq 'edit') {
1031: $text=&Apache::lonxml::get_all_text("endouttext",$parser);
1032: $result.=&Apache::edit::start_table($token)."<tr><td>Text Block</td>
1033: <td>Delete:".
1034: &Apache::edit::deletelist($target,$token)
1035: ."</td>
1036: <td>".
1037: &Apache::edit::insertlist($target,$token).
1038: &Apache::edit::end_row().
1039: &Apache::edit::start_spanning_row()."\n"
1040: .'<table><tr><td>'.
1041: &Apache::loncommon::help_open_topic("Greek_Symbols",
1042: 'Greek Symbols',
1043: undef,undef,600)
1044: .'</td><td>'.
1045: &Apache::loncommon::help_open_topic("Other_Symbols",
1046: 'Other Symbols',
1047: undef,undef,600)
1048: .'</td></tr></table>'.
1049: &Apache::edit::editfield($token->[1],$text,"",80,4);
1050: }
1051: if ($target eq 'modified') {
1052: $text=&Apache::lonxml::get_all_text("endouttext",$parser);
1053: $result='<startouttext />'.&Apache::edit::modifiedfield();
1054: }
1055: if ($target eq 'tex') {
1056: $result .= '\noindent ';
1057: }
1058: return $result;
1059: }
1060:
1061: sub start_endouttext {
1062: my ($target,$token,$tagstack,$parstack,$parser,$safeeval)=@_;
1063: my $result='';
1064: if ($target eq "edit" ) { $result="</td></tr>".&Apache::edit::end_table()."\n"; }
1065: if ($target eq "modified") {
1066: $result='<endouttext />'.
1067: &Apache::edit::handle_insertafter('startouttext'); }
1068: return $result;
1069: }
1070:
1071: sub end_endouttext {
1072: my ($target,$token,$tagstack,$parstack,$parser,$safeeval)=@_;
1073: my @result=('','');
1074: if ($target eq "edit" || $target eq 'modified') { @result=('','no'); }
1075: return (@result);
1076: }
1077:
1078: sub delete_startouttext {
1079: my ($target,$token,$tagstack,$parstack,$parser,$safeeval)=@_;
1080: # my $text=&Apache::lonxml::get_all_text("endouttext",$parser);
1081: my $text=$$parser['-1']->get_text("/endouttext");
1082: my $ntoken=$$parser['-1']->get_token();
1083: &Apache::lonxml::debug("Deleting :$text: and :$ntoken->[0]:$ntoken->[1]:$ntoken->[2]: for startouttext");
1084: &Apache::lonxml::end_tag($tagstack,$parstack,$ntoken);
1085: # Deleting 2 parallel tag pairs, but we need the numbers later to look like
1086: # they did the last time round
1087: &Apache::lonxml::increasedepth($ntoken);
1088: &Apache::lonxml::decreasedepth($ntoken);
1089: return 1;
1090: }
1091:
1092: 1;
1093: __END__
FreeBSD-CVSweb <freebsd-cvsweb@FreeBSD.org>
![[BACK]](/icons/back.gif){kind=icon}
Return to structuretags.pm CVS log ![[TXT]](/icons/text.gif){kind=icon}
![[DIR]](/icons/dir.gif){kind=icon}
Up to [LON-CAPA] / loncom / homework