1: # The LearningOnline Network with CAPA
2: # definition of tags that give a structure to a document
3: #
4: # $Id: structuretags.pm,v 1.155 2003/03/07 23:41:29 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','while','randomlist','problem','library','web','tex','part','preduedate','postanswerdate','solved','notsolved','startouttext','endouttext'));
42: # &Apache::lonxml::register_insert('problem','',('part','postanswerdate','preduedate'))
43: }
44:
45: sub start_web {
46: my ($target,$token,$tagstack,$parstack,$parser,$safeeval)=@_;
47: my $bodytext=&Apache::lonxml::get_all_text("/web",$parser);
48: if ($target eq 'web') {
49: return $bodytext;
50: }
51: return '';
52: }
53:
54: sub end_web {
55: return '';
56: }
57:
58: sub start_tex {
59: my ($target,$token,$tagstack,$parstack,$parser,$safeeval)=@_;
60: my $bodytext=&Apache::lonxml::get_all_text("/tex",$parser);
61: if ($target eq 'tex') {
62: return $bodytext.' ';
63: }
64: return '';
65: }
66:
67: sub end_tex {
68: return '';
69: }
70:
71: sub page_start {
72: my ($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,$parstack,
84: $parser,$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,$safeeval);
92: if ($background) {
93: $Apache::lonxml::extlinks[$#Apache::lonxml::extlinks+1]=
94: $background;
95: $body_tag_start.='background="'.$background.'" ';
96: } else {
97: my $bgcolor=&Apache::lonxml::get_param('bgcolor',$parstack,$safeeval);
98: if ($bgcolor) {
99: $body_tag_start.='bgcolor="'.$bgcolor.'" ';
100: } else {
101: $body_tag_start.='bgcolor="#ffffff"';
102: }
103: }
104: $body_tag_start.='>'.&Apache::lonmenu::menubuttons(undef,$target,1);
105: if ($target eq 'web' && $ENV{'request.state'} ne 'construct') {
106: my ($symb)=&Apache::lonxml::whichuser();
107: if ($symb eq '') {
108: my $help = &Apache::loncommon::help_open_topic("Ambiguous_Reference");
109: $help="Browsing or <a href=\"/adm/ambiguous\">ambiguous</a> reference, submissions ignored $help<br />";
110: $body_tag_start.=$help;
111: }
112: }
113: }
114: my $form_tag_start;
115: if (!defined($found{'form'})) {
116: $form_tag_start='<form name="lonhomework" method="POST" action="'.
117: $ENV{'request.uri'}.'">';
118: }
119: return ($result,$head_tag_start,$body_tag_start,$form_tag_start);
120: }
121:
122: #use Time::HiRes();
123: sub get_resource_name {
124: my ($parstack,$safeeval)=@_;
125: my $name=&Apache::lonnet::gettitle();
126: if ($name eq '') {
127: $name=&Apache::lonnet::EXT('resource.title');
128: if ($name eq 'con_lost') { $name = ''; }
129: }
130: $Apache::lonhomework::name=$name;
131: return $name;
132: }
133:
134: sub setup_rndseed {
135: my ($safeeval)=@_;
136: my $rndseed;
137: if ($ENV{'request.state'} eq "construct") {
138: $rndseed=$ENV{'form.rndseed'};
139: if (!$rndseed) {
140: $rndseed=time;
141: $ENV{'form.rndseed'}=$rndseed;
142: }
143: &Apache::lonxml::debug("Setting rndseed to $rndseed");
144: &Apache::run::run('$external::randomseed='.$rndseed.';',$safeeval);
145: }
146: return $rndseed;
147: }
148:
149: sub problem_edit_header {
150: return '<input type="hidden" name="submitted" value="edit" />
151: <input type="hidden" name="problemmode" value="Edit" />
152: <input type="submit" name="problemmode" value="Discard Edits and View" />
153: <input type="submit" name="problemmode" value="EditXML" />
154: <input type="submit" name="Undo" value="undo" /> <hr />
155: <input type="submit" name="submit" value="Submit Changes and Edit" />
156: <input type="submit" name="submit" value="Submit Changes and View" /><br /><p> </p><table border="0"><tr><td bgcolor="#DDDDDD">
157: ';
158: }
159:
160: sub problem_edit_footer {
161: return '</td></tr></table><br /><input type="submit" name="submit" value="Submit Changes and Edit" />
162: <input type="submit" name="submit" value="Submit Changes and View" />';
163: }
164:
165: sub problem_web_to_edit_header {
166: my ($rndseed)=@_;
167: my $result.='<input type="hidden" name="problemmode" value="View" />
168: <input type="submit" name="problemmode" value="Edit" />
169: <input type="submit" name="problemmode" value="EditXML" />
170: Random Seed:<input type="text" name="rndseed" width="10" value="'.
171: $rndseed.'" />
172: <input type="submit" name="changerandseed" value="Change" />
173: <input type="submit" name="resetdata" value="Reset Submissions" />
174: <input type="checkbox" name="showallfoils" ';
175: if (defined($ENV{'form.showallfoils'})) { $result.='checked="on"'; }
176: $result.= ' /> Show All Foils
177: <hr />';
178: my $numtoanalyze=$ENV{'form.numtoanalyze'};
179: if (!$numtoanalyze) { $numtoanalyze=100; }
180: $result.= '<input type="submit" name="problemmode" value="Answer Distribution" />
181: <input type="text" name="numtoanalyze" value="'.
182: $numtoanalyze.'" size="5" /> <hr />';
183: return $result;
184: }
185:
186: sub initialize_storage {
187: %Apache::lonhomework::results=();
188: my ($symb,$courseid,$domain,$name) = &Apache::lonxml::whichuser();
189: if ($ENV{'request.state'} eq 'construct') {
190: %Apache::lonhomework::history=
191: &Apache::lonnet::tmprestore($ENV{'request.uri'},'',$domain,$name);
192: my ($temp)=keys %Apache::lonhomework::history ;
193: &Apache::lonxml::debug("Return message of $temp");
194: } else {
195: %Apache::lonhomework::history=
196: &Apache::lonnet::restore($symb,$courseid,$domain,$name);
197: }
198: #ignore error conditions
199: my ($temp)=keys %Apache::lonhomework::history ;
200: if ($temp =~ m/^error:.*/) { %Apache::lonhomework::history=(); }
201: }
202:
203: # -------------------------------------------------------------finalize_storage
204: # Stores away the result has to a student's environment
205: # checks form.grade_ for specific values, other wises stores
206: # to the running users environment
207: sub finalize_storage {
208: my $result;
209: my ($temp) = keys %Apache::lonhomework::results;
210: if ( $temp ne '' ) {
211: my ($symb,$courseid,$domain,$name) = &Apache::lonxml::whichuser();
212: if ($ENV{'request.state'} eq 'construct') {
213: $result=&Apache::lonnet::tmpstore(\%Apache::lonhomework::results,
214: $ENV{'request.uri'},'',$domain,$name);
215: &Apache::lonxml::debug('Construct Store return message:'.$result);
216: } else {
217: $result=&Apache::lonnet::cstore(\%Apache::lonhomework::results,
218: $symb,$courseid,$domain,$name);
219: &Apache::lonxml::debug('Store return message:'.$result);
220: }
221: }
222: return $result;
223: }
224:
225: sub checkout_msg {
226: return (<<ENDCHECKOUT);
227: <h2>The resource needs to be checked out</h2>
228: As a resource gets checked out, a unique timestamped ID is given to it, and a
229: permanent record is left in the system.<p />
230: <font color=red>
231: Checking out resources is subject to course policies, and may exclude future
232: credit even if done erroneously.<p />
233: </font>
234: <form name="checkout" method="POST" action="$ENV{'request.uri'}">
235: <input type="hidden" name="doescheckout" value="yes" />
236: <input type="button" name="checkoutbutton" value="Check out Exam for Viewing" onClick="javascript:if (confirm('Check out Exam?')) { document.checkout.submit(); }" />
237: </form>
238: ENDCHECKOUT
239: }
240:
241: sub start_problem {
242: my ($target,$token,$tagstack,$parstack,$parser,$safeeval)=@_;
243:
244: $Apache::lonhomework::parsing_a_problem=1;
245: # meta is called from lonpublisher, which doesn't uses the normal
246: # lonhomework method of parsing the file which means that inputtags
247: # won't get reset
248: if ( $Apache::inputtags::part ne '' && $target != 'meta' ) {
249: &Apache::lonxml::error('Only one problem allowed in a .problem file');
250: my $bodytext=&Apache::lonxml::get_all_text("/problem",$parser);
251: return '';
252: }
253: #intialize globals
254: $Apache::inputtags::part='0';
255: @Apache::inputtags::responselist = ();
256: @Apache::inputtags::previous=();
257: $Apache::structuretags::printanswer='No';
258: if ($target ne 'analyze') {
259: &initialize_storage();
260: if ($target eq 'web') {
261: &Apache::lonhomework::showhash(%Apache::lonhomework::history);
262: }
263: $Apache::lonhomework::type=&Apache::lonnet::EXT('resource.0.type');
264: &Apache::lonxml::debug("Found this to be of type :$Apache::lonhomework::type:");
265: }
266: if ($Apache::lonhomework::type eq '') {
267: my $uri=$ENV{'request.uri'};
268: if ($uri=~/\.(\w+)$/) {
269: $Apache::lonhomework::type=$1;
270: &Apache::lonxml::debug("Using type of $1");
271: } else {
272: $Apache::lonhomework::type='problem';
273: &Apache::lonxml::debug("Using default type, problem, :$uri:");
274: }
275: }
276:
277: #added vars to the scripting enviroment
278: my $expression='$external::part='.$Apache::inputtags::part.';';
279: &Apache::run::run($expression,$safeeval);
280: my $status;
281: my $accessmsg;
282:
283: #should get back a <html> or the neccesary stuff to start XML/MathML
284: my ($result,$head_tag_start,$body_tag_start,$form_tag_start)=
285: &page_start($target,$token,$tagstack,$parstack,$parser,$safeeval);
286: if ($target eq 'tex' and $ENV{'request.symb'} =~ m/\.page_/) { $result = '';}
287:
288: if ($target eq 'analyze') { my $rndseed=&setup_rndseed($safeeval); }
289: if ($target eq 'web' || $target eq 'grade' || $target eq 'answer' || $target eq 'tex') {
290: #handle exam checkout
291: if ($Apache::lonhomework::type eq 'exam') {
292: my $token=$Apache::lonhomework::history{"resource.0.outtoken"};
293: if (($ENV{'form.doescheckout'}) && (!$token)) {
294: $token=&Apache::lonxml::maketoken();
295: $Apache::lonhomework::history{"resource.0.outtoken"}=$token;
296: }
297: $body_tag_start.=&Apache::lonxml::printtokenheader($target,$token);
298: }
299:
300: #handle rand seed in construction space
301: my $rndseed=&setup_rndseed($safeeval);
302: ($status,$accessmsg) = &Apache::lonhomework::check_access('0');
303: push (@Apache::inputtags::status,$status);
304: my $expression='$external::datestatus="'.$status.'";';
305: $expression.='$external::gradestatus="'.$Apache::lonhomework::history{"resource.0.solved"}.'";';
306: &Apache::run::run($expression,$safeeval);
307: &Apache::lonxml::debug("Got $status");
308: if (( $status eq 'CLOSED' ) ||
309: ( $status eq 'UNCHECKEDOUT') ||
310: ( $status eq 'BANNED') ||
311: ( $status eq 'UNAVAILABLE')) {
312: my $bodytext=&Apache::lonxml::get_all_text("/problem",$parser);
313: if ( $target eq "web" ) {
314: $result.= $head_tag_start.'</head>';
315: my $msg=$body_tag_start;
316: if ($status eq 'UNAVAILABLE') {
317: $result.='<h1>Unable to determine if this resource is open due to network problems. Please try again later.</h1>';
318: } else {
319: $result.='<h1>Not open to be viewed</h1>';
320: }
321: if ($status eq 'CLOSED') {
322: $msg.='The problem '.$accessmsg;
323: } elsif ($status eq 'UNCHECKEDOUT') {
324: $msg.=&checkout_msg;
325: }
326: $result.=$msg.'<br />';
327: } elsif ($target eq 'tex') {
328: $result.='\begin{document}\noindent \vskip 1 mm \begin{minipage}{\textwidth}\vskip 0 mm';
329: if ($status eq 'UNAVAILABLE') {
330: $result.='Unable to determine if this resource is open due to network problems. Please try again later.\vskip 0 mm ';
331: } else {
332: $result.="Problem is not open to be viewed. It $accessmsg \\vskip 0 mm ";
333: }
334: }
335: } elsif ($target eq 'web') {
336: my $name= &get_resource_name($parstack,$safeeval);
337: if ($status eq 'CAN_ANSWER') {
338: # create a page header and exit
339: $result.="$head_tag_start<title>$name</title></head>
340: $body_tag_start \n $form_tag_start".
341: '<input type="hidden" name="submitted" value="yes" />';
342: if ($ENV{'request.state'} eq "construct") {
343: $result.= &problem_web_to_edit_header($rndseed);
344: }
345: # if we are viewing someone else preserve that info
346: if (defined $ENV{'form.grade_symb'}) {
347: foreach my $field ('symb','courseid','domain','username') {
348: $result .= '<input type="hidden" name="grade_'.$field.
349: '" value="'.$ENV{"form.grade_$field"}.'" />'."\n";
350: }
351: }
352: } elsif ($status eq 'SHOW_ANSWER' || $status eq 'CANNOT_ANSWER'
353: || $status eq 'CLOSED' || $status eq 'UNAVALAILABLE') {
354: $result.=$head_tag_start.
355: "<title>$name</title></head>\n$body_tag_start\n";
356: }
357: } elsif ($target eq 'tex') {
358: my $name= &Apache::lonxml::get_param('name',$parstack,$safeeval);
359: if ($name eq '') {
360: $name=&Apache::lonnet::EXT('resource.title');
361: if ($name eq 'con_lost') { $name = ''; }
362: }
363: $Apache::lonhomework::name=$name;
364: my $id = $Apache::inputtags::part;
365: my $weight = &Apache::lonnet::EXT("resource.$id.weight");
366: my $allkeys = &Apache::lonnet::metadata($ENV{'request.uri'},'keys');
367: my @allkeys = split /,/,$allkeys;
368: my $allow_print_points = 0;
369: foreach my $partial_key (@allkeys) {
370: if ($partial_key=~m/weight/) {
371: $allow_print_points++;
372: }
373: }
374: my $duedate = &Apache::lonnet::EXT("resource.$id.duedate");
375: $duedate = POSIX::strftime("%c",localtime($duedate));
376: my $temp_file;
377: my $filename = "/home/httpd/prtspool/$ENV{'user.name'}_$ENV{'user.domain'}_printout.due";
378: if (-e $filename) {
379: $temp_file = Apache::File->new($filename);
380: } else {
381: $temp_file = Apache::File->new('>>'.$filename);
382: }
383: my @due_file_content = <$temp_file>;
384: my $due_file_content = $due_file_content[$#due_file_content];
385: chomp $due_file_content;
386: my $name_of_resourse= &get_resource_name($parstack,$safeeval);
387: if ($due_file_content ne $duedate) {
388: $temp_file = Apache::File->new('>'.$filename);
389: print $temp_file "$duedate\n";
390: if (not $ENV{'request.symb'} =~ m/\.page_/) {
391: if(not $duedate=~m/1969/ and $Apache::lonhomework::type ne 'exam') {
392: $result .= '\begin{document} \typeout{STAMPOFPASSEDRESOURCESTART Resource <h2>"'.$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 \begin{minipage}{\textwidth}';
393: } else {
394: $result .= '\begin{document} \typeout{STAMPOFPASSEDRESOURCESTART Resource <h2>"'.$name_of_resourse.'"</h2> located in <br /><small><b>'.$ENV{'request.uri'}.'</b></small><br /> STAMPOFPASSEDRESOURCEEND} \noindent \vskip 1 mm \noindent\begin{minipage}{\textwidth}';
395: if ($Apache::lonhomework::type eq 'exam' and $allow_print_points==1) { $result .= '\fbox{\textit{'.$weight.' pt}}';}
396: }
397: } else {
398: $result .= '\vskip 1mm\textit{Due date: '.$duedate.'} \\\\\\\\';
399: }
400: } else {
401: if (not $ENV{'request.symb'} =~ m/\.page_/) {
402: $result .= '\begin{document} \typeout{STAMPOFPASSEDRESOURCESTART Resource <h2>"'.$name_of_resourse.'"</h2> located in <br /><small><b>'.$ENV{'request.uri'}.'</b></small><br /> STAMPOFPASSEDRESOURCEEND} \noindent \vskip 1 mm\noindent\begin{minipage}{\textwidth}';
403: if (($Apache::lonhomework::type eq 'exam') and ($allow_print_points==1)) { $result .= '\fbox{\textit{'.$weight.' pt}}';}
404: } else {
405: $result .= '\vskip 1mm \\\\\\\\';
406: }
407: }
408: }
409: } elsif ($target eq 'edit') {
410: $result.=$head_tag_start."</head>".$body_tag_start.$form_tag_start.
411: &problem_edit_header();
412: my $temp=&Apache::edit::insertlist($target,$token);
413: $result.=$temp;
414: } elsif ($target eq 'modified') {
415: $result=$token->[4];
416: $result.=&Apache::edit::handle_insert();
417: } else {
418: # page_start returned a starting result, delete it if we don't need it
419: $result = '';
420: }
421: return $result;
422: }
423:
424: sub end_problem {
425: my ($target,$token,$tagstack,$parstack,$parser,$safeeval)=@_;
426: my $result='';
427: my $status=$Apache::inputtags::status['-1'];
428: if ($target eq 'grade' || $target eq 'web' || $target eq 'answer' || $target eq 'tex') {
429: if ( $target eq 'grade' && $Apache::inputtags::part eq '0' && $status eq 'CAN_ANSWER' ) {
430: # if part is zero, no <part>s existed, so we need to the grading
431: &Apache::inputtags::grade;
432: } elsif ( ($target eq 'web' || $target eq 'tex') && $Apache::inputtags::part eq '0' &&
433: $status ne 'UNCHECKEDOUT') {
434: # if part is zero, no <part>s existed, so we need show the current
435: # grading status
436: my $gradestatus = &Apache::inputtags::gradestatus($Apache::inputtags::part,$target);
437: if ($Apache::lonhomework::type ne 'exam') {$result.= $gradestatus;}
438: }
439: if (
440: (($target eq 'web') && ($ENV{'request.state'} ne 'construct')) ||
441: ($target eq 'answer') || ($target eq 'tex')
442: ) {
443: if ($status eq 'CAN_ANSWER') {
444: if ($target ne 'tex') {
445: $result.="</form></body>\n";
446: }
447: } elsif ($status eq 'SHOW_ANSWER' || $status eq 'CANNOT_ANSWER' ||
448: $status eq 'UNCHECKEDOUT' ) {
449: if ($target ne 'tex') {
450: $result.="</body>\n";
451: }
452: }
453: if ($target eq 'web') {
454: $result.=&Apache::lonxml::xmlend();
455: } elsif ($target eq 'tex') {
456: $result .= '\vskip 0.5mm\noindent\makebox[\textwidth/$number_of_columns][b]{\hrulefill}';
457: if (not $ENV{'request.symb'} =~ m/\.page_/) {
458: $result .= '\end{minipage}\end{document} ';
459: } else {
460: $result .= '';
461: }
462: }
463: }
464: if ($target eq 'grade') {
465: &Apache::lonhomework::showhash(%Apache::lonhomework::results);
466: &finalize_storage();
467: }
468: if ($target eq 'answer' && ($ENV{'request.state'} eq 'construct') ) {
469: $result.='</html>'; #normally we get it from xmlend, but in CSTR
470: # we always show answer mode too.
471: }
472: } elsif ($target eq 'meta') {
473: if ($Apache::inputtags::part eq '0') {
474: $result=&Apache::response::mandatory_part_meta;
475: }
476: } elsif ($target eq 'edit') {
477: &Apache::lonxml::debug("in end_problem with $target, edit");
478: $result = &problem_edit_footer();
479: }
480:
481: undef(%Apache::lonhomework::history);
482: undef(%Apache::lonhomework::results);
483: undef($Apache::inputtags::part);
484: undef($Apache::lonhomework::parsing_a_problem);
485:
486: return $result;
487: }
488:
489:
490: sub start_library {
491: my ($target,$token,$tagstack,$parstack,$parser,$safeeval)=@_;
492: my ($result,$head_tag_start,$body_tag_start,$form_tag_start);
493:
494: if ($target eq 'edit') {
495: ($result,$head_tag_start,$body_tag_start,$form_tag_start)=
496: &page_start($target,$token,$tagstack,$parstack,$parser,$safeeval);
497: $result.=$head_tag_start."</head>".$body_tag_start.$form_tag_start.
498: &problem_edit_header();
499: my $temp=&Apache::edit::insertlist($target,$token);
500: $result.=$temp;
501: } elsif ($target eq 'modified') {
502: $result=$token->[4];
503: $result.=&Apache::edit::handle_insert();
504: } elsif ($target eq 'web' && $$tagstack[0] ne 'problem' &&
505: $ENV{'request.state'} eq "construct" ) {
506: ($result,$head_tag_start,$body_tag_start,$form_tag_start)=
507: &page_start($target,$token,$tagstack,$parstack,$parser,$safeeval);
508: my $name=&get_resource_name($parstack,$safeeval);
509: my $rndseed=&setup_rndseed($safeeval);
510: $result.="$head_tag_start<title>$name</title></head>
511: $body_tag_start \n $form_tag_start".
512: '<input type="hidden" name="submitted" value="yes" />';
513: $result.=&problem_web_to_edit_header($rndseed);
514: }
515: return $result;
516: }
517:
518: sub end_library {
519: my ($target,$token,$tagstack,$parstack,$parser,$safeeval)=@_;
520: my $result='';
521: if ($target eq 'edit') {
522: $result=&problem_edit_footer();
523: } elsif ($target eq 'web' && $$tagstack[0] ne 'problem' &&
524: $ENV{'request.state'} eq "construct") {
525: $result.='</form></body>'.&Apache::lonxml::xmlend();
526: }
527: return $result;
528: }
529:
530: sub start_block {
531: my ($target,$token,$tagstack,$parstack,$parser,$safeeval)=@_;
532:
533: my $result;
534:
535: if ($target eq 'web' || $target eq 'grade' || $target eq 'answer' ||
536: $target eq 'tex' || $target eq 'analyze') {
537: my $code = @$parstack[$#$parstack];
538: if ($code) {
539: $code =~ s/\"//g;
540: $code .=';return $condition;';
541: if (!$Apache::lonxml::default_homework_loaded) {
542: &Apache::lonxml::default_homework_load($safeeval);
543: }
544: $result = &Apache::run::run($code,$safeeval);
545: &Apache::lonxml::debug("block :$code: returned :$result:");
546: } else {
547: $result='1';
548: }
549: if ( ! $result ) {
550: my $skip=&Apache::lonxml::get_all_text("/block",$parser);
551: &Apache::lonxml::debug("skipping ahead :$skip: $$parser[-1]");
552: }
553: $result='';
554: } elsif ($target eq 'edit') {
555: $result .=&Apache::edit::tag_start($target,$token);
556: $result .=&Apache::edit::text_arg('Test Condition:','condition',
557: $token,40);
558: $result .=&Apache::edit::end_row().&Apache::edit::start_spanning_row();
559: } elsif ($target eq 'modified') {
560: my $constructtag=&Apache::edit::get_new_args($token,$parstack,
561: $safeeval,'condition');
562: if ($constructtag) { $result = &Apache::edit::rebuild_tag($token); }
563: }
564: return $result;
565: }
566:
567: sub end_block {
568: return '';
569: }
570:
571: sub start_while {
572: my ($target,$token,$tagstack,$parstack,$parser,$safeeval)=@_;
573:
574: my $code = @$parstack[$#$parstack];
575: $code =~ s/\"//g;
576: $code .=';return $condition;';
577:
578: push( @Apache::structuretags::whileconds, $code);
579: if (!$Apache::lonxml::default_homework_loaded) {
580: &Apache::lonxml::default_homework_load($safeeval);
581: }
582: my $result = &Apache::run::run($code,$safeeval);
583: my $bodytext=$$parser[$#$parser]->get_text("/while");
584: push( @Apache::structuretags::whilebody, $bodytext);
585: if ( $result ) {
586: &Apache::lonxml::newparser($parser,\$bodytext);
587: }
588: return "";
589: }
590:
591: sub end_while {
592: my ($target,$token,$tagstack,$parstack,$parser,$safeeval)=@_;
593: my $code = pop @Apache::structuretags::whileconds;
594: my $bodytext = pop @Apache::structuretags::whilebody;
595: my $result = &Apache::run::run($code,$safeeval);
596: if ( $result ) {
597: &Apache::lonxml::newparser($parser,\$bodytext);
598: }
599: return "";
600: }
601:
602: # <randomlist show="1">
603: # <tag1>..</tag1>
604: # <tag2>..</tag2>
605: # <tag3>..</tag3>
606: # ...
607: # </randomlist>
608: sub start_randomlist {
609: my ($target,$token,$tagstack,$parstack,$parser,$safeeval)=@_;
610: my $result;
611: if ($target eq 'answer' || $target eq 'grade' || $target eq 'web' ||
612: $target eq 'tex' || $target eq 'analyze') {
613: my $body= &Apache::lonxml::get_all_text("/randomlist",$parser);
614: my $b_parser= HTML::TokeParser->new(\$body);
615: my $b_tok;
616: my @randomlist;
617: my $list_item;
618: while($b_tok = $b_parser->get_token() ) {
619: if($b_tok->[0] eq 'S') { # start tag
620: # get content of the tag until matching end tag
621: # get all text upto the matching tag
622: # and push the content into @randomlist
623: $list_item = &Apache::lonxml::get_all_text('/'.$b_tok->[1],$b_parser);
624: $list_item = "$b_tok->[4]"."$list_item"."</$b_tok->[1]>";
625: push(@randomlist,$list_item);
626: # print "<br /><b>START-TAG $b_tok->[1], $b_tok->[4], $list_item</b>";
627: }
628: if($b_tok->[0] eq 'T') { # text
629: # what to do with text in between tags?
630: # print "<b>TEXT $b_tok->[1]</b><br />";
631: }
632: # if($b_tok->[0] eq 'E') { # end tag, should not happen
633: # print "<b>END-TAG $b_tok->[1]</b><br />";
634: # }
635: }
636: my @idx_arr = (0 .. $#randomlist);
637: &Apache::structuretags::shuffle(\@idx_arr);
638: my $bodytext = '';
639: my $show=$#randomlist;
640: my $showarg=&Apache::lonxml::get_param('show',$parstack,$safeeval);
641: $showarg--;
642: if ( ($showarg >= 0) && ($showarg < $show) ) { $show = $showarg; }
643: for(0 .. $show) {
644: $bodytext .= "$randomlist[ $idx_arr[$_] ]";
645: }
646: &Apache::lonxml::newparser($parser,\$bodytext);
647: } elsif ($target eq 'edit' ) {
648: $result .= &Apache::edit::tag_start($target,$token);
649: $result .= &Apache::edit::text_arg('Maximum Tags to Show:','show',$token,5);
650: $result .= &Apache::edit::end_row().&Apache::edit::start_spanning_row();
651: } elsif ($target eq 'modified' ) {
652: my $constructtag=&Apache::edit::get_new_args($token,$parstack,$safeeval,
653: 'show');
654: if ($constructtag) { $result = &Apache::edit::rebuild_tag($token); }
655: }
656: return $result;
657: }
658:
659: sub shuffle {
660: my $a=shift;
661: my $i;
662: if (defined(@$a)) {
663: &Apache::response::setrandomnumber();
664: for($i=@$a;--$i;) {
665: my $j=int(&Math::Random::random_uniform() * ($i+1));
666: next if $i == $j;
667: @$a[$i,$j] = @$a[$j,$i];
668: }
669: }
670: }
671:
672: sub end_randomlist {
673: my ($target,$token,$tagstack,$parstack,$parser,$safeeval)=@_;
674: my $result;
675: if ($target eq 'edit' ) {
676: $result=&Apache::edit::tag_end($target,$token,'End Randomly Parsed Block');
677: }
678: return $result;
679: }
680:
681: sub start_part {
682: my ($target,$token,$tagstack,$parstack,$parser,$safeeval)=@_;
683: my $result='';
684: my $id= &Apache::lonxml::get_param('id',$parstack,$safeeval);
685: if ($id eq '') { $id = $Apache::lonxml::curdepth; }
686: $Apache::inputtags::part=$id;
687: @Apache::inputtags::responselist = ();
688: @Apache::inputtags::previous=();
689: my $hidden=&Apache::loncommon::check_if_partid_hidden($Apache::inputtags::part);
690:
691: if ($target eq 'meta') {
692: return &Apache::response::mandatory_part_meta;
693: } elsif ($target eq 'web' || $target eq 'grade' ||
694: $target eq 'answer' || $target eq 'tex') {
695: if ($hidden) {
696: my $bodytext=&Apache::lonxml::get_all_text("/part",$parser);
697: } else {
698: my ($status,$accessmsg) = &Apache::lonhomework::check_access($id);
699: push (@Apache::inputtags::status,$status);
700: my $expression='$external::datestatus="'.$status.'";';
701: $expression.='$external::gradestatus="'.$Apache::lonhomework::history{"resource.$id.solved"}.'";';
702: &Apache::run::run($expression,$safeeval);
703: if ( $status eq 'CLOSED' ) {
704: my $bodytext=&Apache::lonxml::get_all_text("/part",$parser);
705: if ( $target eq "web" ) {
706: $result="<br />Part is not open to be viewed. It $accessmsg<br />";
707: } elsif ( $target eq 'tex' ) {
708: $result="\\end{minipage}\\vskip 0 mm Part is not open to be viewed. It $accessmsg \\\\\\begin{minipage}{\\textwidth}";
709: }
710: } else {
711: if ($target eq 'tex') {
712: $result.='\noindent \end{minipage}\vskip 0 mm \noindent \begin{minipage}{\textwidth}\noindent';
713: my $weight = &Apache::lonnet::EXT("resource.$id.weight");
714: if ($Apache::lonhomework::type eq 'exam') { $result .= '\fbox{\textit{'.$weight.' pt}}';}
715: }
716: }
717: }
718: } elsif ($target eq 'edit') {
719: $result.=&Apache::edit::tag_start($target,$token);
720: $result.=&Apache::edit::text_arg('Part ID:','id',$token).
721: &Apache::loncommon::help_open_topic("Part_Tag_Edit_Help").
722: &Apache::edit::end_row().&Apache::edit::start_spanning_row();
723:
724: } elsif ($target eq 'modified') {
725: my $constructtag=&Apache::edit::get_new_args($token,$parstack,$safeeval,
726: 'id');
727: if ($constructtag) {
728: $result = &Apache::edit::rebuild_tag($token);
729: $result.=&Apache::edit::handle_insert();
730: }
731: }
732: return $result;
733: }
734:
735: sub end_part {
736: my ($target,$token,$tagstack,$parstack,$parser,$safeeval)=@_;
737: &Apache::lonxml::debug("in end_part $target ");
738: my $status=$Apache::inputtags::status['-1'];
739: my $hidden=&Apache::loncommon::check_if_partid_hidden($Apache::inputtags::part);
740: my $result='';
741: if ( $target eq 'meta' ) {
742: $result='';
743: } elsif ( $target eq 'grade' && $status eq 'CAN_ANSWER' && !$hidden) {
744: $result=&Apache::inputtags::grade;
745: } elsif (($target eq 'web' || $target eq 'tex') && !$hidden ) {
746: my $gradestatus=&Apache::inputtags::gradestatus($Apache::inputtags::part,
747: $target);
748: if ($Apache::lonhomework::type eq 'exam') {$gradestatus='';}
749: $result=$gradestatus;
750: }
751: pop @Apache::inputtags::status;
752: $Apache::inputtags::part='';
753: return $result;
754: }
755:
756: sub start_preduedate {
757: my ($target,$token,$tagstack,$parstack,$parser,$safeeval)=@_;
758: if ($target eq 'web' || $target eq 'grade' || $target eq 'answer' || $target eq 'tex') {
759: if ($Apache::inputtags::status['-1'] ne 'CAN_ANSWER' &&
760: $Apache::inputtags::status['-1'] ne 'CANNOT_ANSWER' &&
761: $Apache::inputtags::status['-1'] ne 'SHOW_ANSWER') {
762: &Apache::lonxml::get_all_text("/preduedate",$parser);
763: }
764: }
765: return '';
766: }
767:
768: sub end_preduedate {
769: return '';
770: }
771:
772: sub start_postanswerdate {
773: my ($target,$token,$tagstack,$parstack,$parser,$safeeval)=@_;
774: if ($target eq 'web' || $target eq 'grade' || $target eq 'tex') {
775: if ($Apache::inputtags::status['-1'] ne 'SHOW_ANSWER') {
776: &Apache::lonxml::get_all_text("/postanswerdate",$parser);
777: }
778: } elsif ($target eq 'tex') {
779: return '\vskip 0 mm \noindent';
780: }
781: return '';
782: }
783:
784: sub end_postanswerdate {
785: return '';
786: }
787:
788: sub start_notsolved {
789: my ($target,$token,$tagstack,$parstack,$parser,$safeeval)=@_;
790: if ($target eq 'web' || $target eq 'grade' || $target eq 'answer' || $target eq 'tex') {
791: my $gradestatus=$Apache::lonhomework::history{"resource.$Apache::inputtags::part.solved"};
792: &Apache::lonxml::debug("not solved has :$gradestatus:");
793: if ($gradestatus =~ /^correct/) {
794: &Apache::lonxml::debug("skipping");
795: &Apache::lonxml::get_all_text("/notsolved",$parser);
796: }
797: }
798: return '';
799: }
800:
801: sub end_notsolved {
802: return '';
803: }
804:
805: sub start_solved {
806: my ($target,$token,$tagstack,$parstack,$parser,$safeeval)=@_;
807: if ($target eq 'web' || $target eq 'grade' || $target eq 'answer' || $target eq 'tex') {
808: my $gradestatus=$Apache::lonhomework::history{"resource.$Apache::inputtags::part.solved"};
809: if ($gradestatus !~ /^correct/) {
810: &Apache::lonxml::get_all_text("/solved",$parser);
811: }
812: }
813: return '';
814: }
815:
816: sub end_solved {
817: return '';
818: }
819:
820: sub start_startouttext {
821: my ($target,$token,$tagstack,$parstack,$parser,$safeeval)=@_;
822: my @result=(''.'');
823: if ($target eq 'edit' || $target eq 'modified' ) { @result=('','no'); }
824: return (@result);
825: }
826: sub end_startouttext {
827: my ($target,$token,$tagstack,$parstack,$parser,$safeeval)=@_;
828: my $result='';
829: my $text='';
830:
831: if ($target eq 'edit') {
832: $text=&Apache::lonxml::get_all_text("endouttext",$parser);
833: $result.=&Apache::edit::start_table($token)."<tr><td>Text Block</td>
834: <td>Delete:".
835: &Apache::edit::deletelist($target,$token)
836: ."</td>
837: <td>".
838: &Apache::edit::insertlist($target,$token).
839: &Apache::edit::end_row().&Apache::edit::start_spanning_row()."\n"
840: .'<table><tr><td>'.
841: &Apache::loncommon::help_open_topic("Greek_Symbols",'Greek Symbols',
842: undef,undef,600)
843: .'</td><td>'.
844: &Apache::loncommon::help_open_topic("Other_Symbols",'Other Symbols',
845: undef,undef,600)
846: .'</td></tr></table>'.
847: &Apache::edit::editfield($token->[1],$text,"",80,4);
848: }
849: if ($target eq 'modified') {
850: $text=&Apache::lonxml::get_all_text("endouttext",$parser);
851: $result='<startouttext />'.&Apache::edit::modifiedfield();
852: }
853: if ($target eq 'tex') {
854: $result .= '\noindent ';
855: }
856: return $result;
857: }
858: sub start_endouttext {
859: my ($target,$token,$tagstack,$parstack,$parser,$safeeval)=@_;
860: my $result='';
861: if ($target eq "edit" ) { $result="</td></tr>".&Apache::edit::end_table()."\n"; }
862: if ($target eq "modified") {
863: $result='<endouttext />'.
864: &Apache::edit::handle_insertafter('startouttext'); }
865: return $result;
866: }
867: sub end_endouttext {
868: my ($target,$token,$tagstack,$parstack,$parser,$safeeval)=@_;
869: my @result=('','');
870: if ($target eq "edit" || $target eq 'modified') { @result=('','no'); }
871: return (@result);
872: }
873: sub delete_startouttext {
874: my ($target,$token,$tagstack,$parstack,$parser,$safeeval)=@_;
875: # my $text=&Apache::lonxml::get_all_text("endouttext",$parser);
876: my $text=$$parser['-1']->get_text("/endouttext");
877: my $ntoken=$$parser['-1']->get_token();
878: &Apache::lonxml::debug("Deleting :$text: and :$ntoken->[0]:$ntoken->[1]:$ntoken->[2]: for startouttext");
879: &Apache::lonxml::end_tag($tagstack,$parstack,$ntoken);
880: # Deleting 2 parallel tag pairs, but we need the numbers later to look like
881: # they did the last time round
882: &Apache::lonxml::increasedepth($ntoken);
883: &Apache::lonxml::decreasedepth($ntoken);
884: return 1;
885: }
886:
887: 1;
888: __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