1: # The LearningOnline Network with CAPA
2: # definition of tags that give a structure to a document
3: #
4: # $Id: structuretags.pm,v 1.161 2003/04/03 17:44:12 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: }
43:
44: sub start_web {
45: my ($target,$token,$tagstack,$parstack,$parser,$safeeval)=@_;
46: my $bodytext=&Apache::lonxml::get_all_text("/web",$parser);
47: if ($target eq 'web') {
48: return $bodytext;
49: }
50: return '';
51: }
52:
53: sub end_web {
54: return '';
55: }
56:
57: sub start_tex {
58: my ($target,$token,$tagstack,$parstack,$parser,$safeeval)=@_;
59: my $bodytext=&Apache::lonxml::get_all_text("/tex",$parser);
60: if ($target eq 'tex') {
61: return $bodytext.' ';
62: }
63: return '';
64: }
65:
66: sub end_tex {
67: return '';
68: }
69:
70: sub page_start {
71: my ($target,$token,$tagstack,$parstack,$parser,$safeeval)=@_;
72: my %found;
73: foreach my $taginside ($tagstack) {
74: foreach my $taglookedfor ('html','body','form') {
75: if ($taginside =~ /^$taglookedfor$/i) {$found{$taglookedfor} = 1;}
76: }
77: }
78:
79: my $result;
80: my $head_tag_start;
81: if (!defined($found{'html'})) {
82: $result=&Apache::londefdef::start_html($target,$token,$tagstack,
83: $parstack,$parser,$safeeval);
84: $head_tag_start='<head>'.&Apache::lonmenu::registerurl(undef,$target);
85: }
86: my $body_tag_start;
87: if (!defined($found{'body'})) {
88: $body_tag_start='<body onLoad="'.&Apache::lonmenu::loadevents().'" '.
89: 'onUnload="'.&Apache::lonmenu::unloadevents().'" ';
90: my $background=&Apache::lonxml::get_param('background',$parstack,
91: $safeeval);
92: if ($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,
98: $safeeval);
99: if ($bgcolor) {
100: $body_tag_start.='bgcolor="'.$bgcolor.'" ';
101: } else {
102: $body_tag_start.='bgcolor="#ffffff"';
103: }
104: }
105: $body_tag_start.='>'.&Apache::lonmenu::menubuttons(undef,$target,1);
106: if ($target eq 'web' && $ENV{'request.state'} ne 'construct') {
107: my ($symb)=&Apache::lonxml::whichuser();
108: if ($symb eq '') {
109: my $help = &Apache::loncommon::help_open_topic("Ambiguous_Reference");
110: $help="Browsing or <a href=\"/adm/ambiguous\">ambiguous</a> reference, submissions ignored $help<br />";
111: $body_tag_start.=$help;
112: }
113: }
114: }
115: my $form_tag_start;
116: if (!defined($found{'form'})) {
117: $form_tag_start='<form name="lonhomework" method="POST" action="'.
118: $ENV{'request.uri'}.'">';
119: }
120: return ($result,$head_tag_start,$body_tag_start,$form_tag_start);
121: }
122:
123: #use Time::HiRes();
124: sub get_resource_name {
125: my ($parstack,$safeeval)=@_;
126: my $name=&Apache::lonnet::gettitle();
127: if ($name eq '') {
128: $name=&Apache::lonnet::EXT('resource.title');
129: if ($name eq 'con_lost') { $name = ''; }
130: }
131: $Apache::lonhomework::name=$name;
132: return $name;
133: }
134:
135: sub setup_rndseed {
136: my ($safeeval)=@_;
137: my $rndseed;
138: if ($ENV{'request.state'} eq "construct") {
139: $rndseed=$ENV{'form.rndseed'};
140: if (!$rndseed) {
141: $rndseed=time;
142: $ENV{'form.rndseed'}=$rndseed;
143: }
144: &Apache::lonxml::debug("Setting rndseed to $rndseed");
145: &Apache::run::run('$external::randomseed='.$rndseed.';',$safeeval);
146: }
147: return $rndseed;
148: }
149:
150: sub problem_edit_header {
151: return '<input type="hidden" name="submitted" value="edit" />
152: <input type="hidden" name="problemmode" value="Edit" />
153: <input type="submit" name="problemmode" value="Discard Edits and View" />
154: <input type="submit" name="problemmode" value="EditXML" />
155: <input type="submit" name="Undo" value="undo" /> <hr />
156: <input type="submit" name="submit" value="Submit Changes and Edit" />
157: <input type="submit" name="submit" value="Submit Changes and View" /><br /><p> </p><table border="0"><tr><td bgcolor="#DDDDDD">
158: ';
159: }
160:
161: sub problem_edit_footer {
162: return '</td></tr></table><br /><input type="submit" name="submit" value="Submit Changes and Edit" />
163: <input type="submit" name="submit" value="Submit Changes and View" />';
164: }
165:
166: sub problem_web_to_edit_header {
167: my ($rndseed)=@_;
168: my $result.='<input type="hidden" name="problemmode" value="View" />
169: <input type="submit" name="problemmode" value="Edit" />
170: <input type="submit" name="problemmode" value="EditXML" />
171: Random Seed:<input type="text" name="rndseed" width="10" value="'.
172: $rndseed.'" />
173: <input type="submit" name="changerandseed" value="Change" />
174: <input type="submit" name="resetdata" value="Reset Submissions" />
175: <input type="checkbox" name="showallfoils" ';
176: if (defined($ENV{'form.showallfoils'})) { $result.='checked="on"'; }
177: $result.= ' /> Show All Foils
178: <hr />';
179: my $numtoanalyze=$ENV{'form.numtoanalyze'};
180: if (!$numtoanalyze) { $numtoanalyze=100; }
181: $result.= '<input type="submit" name="problemmode" value="Answer Distribution" />
182: <input type="text" name="numtoanalyze" value="'.
183: $numtoanalyze.'" size="5" /> <hr />';
184: return $result;
185: }
186:
187: sub initialize_storage {
188: %Apache::lonhomework::results=();
189: my ($symb,$courseid,$domain,$name) = &Apache::lonxml::whichuser();
190: if ($ENV{'request.state'} eq 'construct') {
191: %Apache::lonhomework::history=
192: &Apache::lonnet::tmprestore($ENV{'request.uri'},'',$domain,$name);
193: my ($temp)=keys %Apache::lonhomework::history ;
194: &Apache::lonxml::debug("Return message of $temp");
195: } else {
196: %Apache::lonhomework::history=
197: &Apache::lonnet::restore($symb,$courseid,$domain,$name);
198: }
199: #ignore error conditions
200: my ($temp)=keys %Apache::lonhomework::history ;
201: if ($temp =~ m/^error:.*/) { %Apache::lonhomework::history=(); }
202: }
203:
204: # -------------------------------------------------------------finalize_storage
205: # Stores away the result has to a student's environment
206: # checks form.grade_ for specific values, other wises stores
207: # to the running users environment
208: sub finalize_storage {
209: my $result;
210: my ($temp) = keys %Apache::lonhomework::results;
211: if ( $temp ne '' ) {
212: my ($symb,$courseid,$domain,$name) = &Apache::lonxml::whichuser();
213: if ($ENV{'request.state'} eq 'construct') {
214: $result=&Apache::lonnet::tmpstore(\%Apache::lonhomework::results,
215: $ENV{'request.uri'},'',$domain,$name);
216: &Apache::lonxml::debug('Construct Store return message:'.$result);
217: } else {
218: $result=&Apache::lonnet::cstore(\%Apache::lonhomework::results,
219: $symb,$courseid,$domain,$name);
220: &Apache::lonxml::debug('Store return message:'.$result);
221: }
222: }
223: return $result;
224: }
225:
226: sub checkout_msg {
227: return (<<ENDCHECKOUT);
228: <h2>The resource needs to be checked out</h2>
229: As a resource gets checked out, a unique timestamped ID is given to it, and a
230: permanent record is left in the system.<p />
231: <font color=red>
232: Checking out resources is subject to course policies, and may exclude future
233: credit even if done erroneously.<p />
234: </font>
235: <form name="checkout" method="POST" action="$ENV{'request.uri'}">
236: <input type="hidden" name="doescheckout" value="yes" />
237: <input type="button" name="checkoutbutton" value="Check out Exam for Viewing" onClick="javascript:if (confirm('Check out Exam?')) { document.checkout.submit(); }" />
238: </form>
239: ENDCHECKOUT
240: }
241:
242: sub start_problem {
243: my ($target,$token,$tagstack,$parstack,$parser,$safeeval)=@_;
244:
245: $Apache::lonhomework::parsing_a_problem=1;
246: # meta is called from lonpublisher, which doesn't uses the normal
247: # lonhomework method of parsing the file which means that inputtags
248: # won't get reset
249: if ( $Apache::inputtags::part ne '' && $target != 'meta' ) {
250: &Apache::lonxml::error('Only one problem allowed in a .problem file');
251: my $bodytext=&Apache::lonxml::get_all_text("/problem",$parser);
252: return '';
253: }
254: #initialize globals
255: $Apache::inputtags::part='0';
256: @Apache::inputtags::responselist = ();
257: @Apache::inputtags::previous=();
258: @Apache::inputtags::previous_version=();
259: $Apache::structuretags::printanswer='No';
260: @Apache::structuretags::whileconds=();
261: @Apache::structuretags::whilebody=();
262: @Apache::structuretags::whileline=();
263:
264: if ($target ne 'analyze') {
265: &initialize_storage();
266: if ($target eq 'web') {
267: &Apache::lonhomework::showhash(%Apache::lonhomework::history);
268: }
269: $Apache::lonhomework::type=&Apache::lonnet::EXT('resource.0.type');
270: &Apache::lonxml::debug("Found this to be of type :$Apache::lonhomework::type:");
271: }
272: if ($Apache::lonhomework::type eq '') {
273: my $uri=$ENV{'request.uri'};
274: if ($uri=~/\.(\w+)$/) {
275: $Apache::lonhomework::type=$1;
276: &Apache::lonxml::debug("Using type of $1");
277: } else {
278: $Apache::lonhomework::type='problem';
279: &Apache::lonxml::debug("Using default type, problem, :$uri:");
280: }
281: }
282:
283: #added vars to the scripting enviroment
284: my $expression='$external::part='.$Apache::inputtags::part.';';
285: &Apache::run::run($expression,$safeeval);
286: my $status;
287: my $accessmsg;
288:
289: #should get back a <html> or the neccesary stuff to start XML/MathML
290: my ($result,$head_tag_start,$body_tag_start,$form_tag_start)=
291: &page_start($target,$token,$tagstack,$parstack,$parser,$safeeval);
292: if ($target eq 'tex' and $ENV{'request.symb'} =~ m/\.page_/) {$result='';}
293:
294: if ($target eq 'analyze') { my $rndseed=&setup_rndseed($safeeval); }
295: if ($target eq 'web' || $target eq 'grade' || $target eq 'answer' ||
296: $target eq 'tex') {
297: #handle exam checkout
298: if ($Apache::lonhomework::type eq 'exam') {
299: my $token=
300: $Apache::lonhomework::history{"resource.0.outtoken"};
301: if (($ENV{'form.doescheckout'}) && (!$token)) {
302: $token=&Apache::lonxml::maketoken();
303: $Apache::lonhomework::history{"resource.0.outtoken"}=
304: $token;
305: }
306: $body_tag_start.=&Apache::lonxml::printtokenheader($target,$token);
307: }
308:
309: #handle rand seed in construction space
310: my $rndseed=&setup_rndseed($safeeval);
311: ($status,$accessmsg) = &Apache::lonhomework::check_access('0');
312: push (@Apache::inputtags::status,$status);
313: my $expression='$external::datestatus="'.$status.'";';
314: $expression.='$external::gradestatus="'.$Apache::lonhomework::history{"resource.0.solved"}.'";';
315: &Apache::run::run($expression,$safeeval);
316: &Apache::lonxml::debug("Got $status");
317: if (( $status eq 'CLOSED' ) ||
318: ( $status eq 'UNCHECKEDOUT') ||
319: ( $status eq 'BANNED') ||
320: ( $status eq 'UNAVAILABLE')) {
321: my $bodytext=&Apache::lonxml::get_all_text("/problem",$parser);
322: if ( $target eq "web" ) {
323: $result.= $head_tag_start.'</head>';
324: my $msg=$body_tag_start;
325: if ($status eq 'UNAVAILABLE') {
326: $result.='<h1>Unable to determine if this resource is open due to network problems. Please try again later.</h1>';
327: } else {
328: $result.='<h1>Not open to be viewed</h1>';
329: }
330: if ($status eq 'CLOSED') {
331: $msg.='The problem '.$accessmsg;
332: } elsif ($status eq 'UNCHECKEDOUT') {
333: $msg.=&checkout_msg;
334: }
335: $result.=$msg.'<br />';
336: } elsif ($target eq 'tex') {
337: $result.='\begin{document}\noindent \vskip 1 mm \begin{minipage}{\textwidth}\vskip 0 mm';
338: if ($status eq 'UNAVAILABLE') {
339: $result.='Unable to determine if this resource is open due to network problems. Please try again later.\vskip 0 mm ';
340: } else {
341: $result.="Problem is not open to be viewed. It $accessmsg \\vskip 0 mm ";
342: }
343: }
344: } elsif ($target eq 'web') {
345: my $name= &get_resource_name($parstack,$safeeval);
346: if ($status eq 'CAN_ANSWER') {
347: # create a page header and exit
348: $result.="$head_tag_start<title>$name</title></head>
349: $body_tag_start \n $form_tag_start".
350: '<input type="hidden" name="submitted" value="yes" />';
351: if ($ENV{'request.state'} eq "construct") {
352: $result.= &problem_web_to_edit_header($rndseed);
353: }
354: # if we are viewing someone else preserve that info
355: if (defined $ENV{'form.grade_symb'}) {
356: foreach my $field ('symb','courseid','domain','username') {
357: $result .= '<input type="hidden" name="grade_'.$field.
358: '" value="'.$ENV{"form.grade_$field"}.'" />'."\n";
359: }
360: }
361: } elsif ($status eq 'SHOW_ANSWER' || $status eq 'CANNOT_ANSWER'
362: || $status eq 'CLOSED' || $status eq 'UNAVALAILABLE') {
363: $result.=$head_tag_start.
364: "<title>$name</title></head>\n$body_tag_start\n";
365: }
366: } elsif ($target eq 'tex') {
367: my $name= &Apache::lonxml::get_param('name',$parstack,$safeeval);
368: if ($name eq '') {
369: $name=&Apache::lonnet::EXT('resource.title');
370: if ($name eq 'con_lost') { $name = ''; }
371: }
372: $Apache::lonhomework::name=$name;
373: my $id = $Apache::inputtags::part;
374: my $weight = &Apache::lonnet::EXT("resource.$id.weight");
375: my $allkeys=&Apache::lonnet::metadata($ENV{'request.uri'},'keys');
376: my @allkeys = split /,/,$allkeys;
377: my $allow_print_points = 0;
378: foreach my $partial_key (@allkeys) {
379: if ($partial_key=~m/weight/) {
380: $allow_print_points++;
381: }
382: }
383: my $duedate = &Apache::lonnet::EXT("resource.$id.duedate");
384: $duedate = POSIX::strftime("%c",localtime($duedate));
385: my $temp_file;
386: my $filename = "/home/httpd/prtspool/$ENV{'user.name'}_$ENV{'user.domain'}_printout.due";
387: if (-e $filename) {
388: $temp_file = Apache::File->new($filename);
389: } else {
390: $temp_file = Apache::File->new('>>'.$filename);
391: }
392: my @due_file_content = <$temp_file>;
393: my $due_file_content = $due_file_content[$#due_file_content];
394: chomp $due_file_content;
395: my $name_of_resourse= &get_resource_name($parstack,$safeeval);
396: if ($due_file_content ne $duedate) {
397: $temp_file = Apache::File->new('>'.$filename);
398: print $temp_file "$duedate\n";
399: if (not $ENV{'request.symb'} =~ m/\.page_/) {
400: if(not $duedate=~m/1969/ and $Apache::lonhomework::type ne 'exam') {
401: $result .= '\begin{document} \typeout{STAMPOFPASSEDRESOURCESTART Resource <h2>"'.$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}';
402: } else {
403: $result .= '\begin{document} \typeout{STAMPOFPASSEDRESOURCESTART Resource <h2>"'.$name_of_resourse.'"</h2> located in <br /><small><b>'.$ENV{'request.uri'}.'</b></small><br /> STAMPOFPASSEDRESOURCEEND} \noindent \vskip 1 mm \noindent\begin{minipage}{\textwidth}';
404: if ($Apache::lonhomework::type eq 'exam' and $allow_print_points==1) { $result .= '\fbox{\textit{'.$weight.' pt}}';}
405: }
406: } else {
407: $result .= '\vskip 1mm\textit{Due date: '.$duedate.'} \\\\\\\\';
408: }
409: } else {
410: if (not $ENV{'request.symb'} =~ m/\.page_/) {
411: $result .= '\begin{document} \typeout{STAMPOFPASSEDRESOURCESTART Resource <h2>"'.$name_of_resourse.'"</h2> located in <br /><small><b>'.$ENV{'request.uri'}.'</b></small><br /> STAMPOFPASSEDRESOURCEEND} \noindent \vskip 1 mm\noindent\begin{minipage}{\textwidth}';
412: if (($Apache::lonhomework::type eq 'exam') and ($allow_print_points==1)) { $result .= '\fbox{\textit{'.$weight.' pt}}';}
413: } else {
414: $result .= '\vskip 1mm \\\\\\\\';
415: }
416: }
417: }
418: } elsif ($target eq 'edit') {
419: $result.=$head_tag_start."</head>".$body_tag_start.$form_tag_start.
420: &problem_edit_header();
421: my $temp=&Apache::edit::insertlist($target,$token);
422: $result.=$temp;
423: } elsif ($target eq 'modified') {
424: $result=$token->[4];
425: $result.=&Apache::edit::handle_insert();
426: } else {
427: # page_start returned a starting result, delete it if we don't need it
428: $result = '';
429: }
430: return $result;
431: }
432:
433: sub end_problem {
434: my ($target,$token,$tagstack,$parstack,$parser,$safeeval)=@_;
435: my $result='';
436: my $status=$Apache::inputtags::status['-1'];
437: if ($target eq 'grade' || $target eq 'web' || $target eq 'answer' ||
438: $target eq 'tex') {
439: if ( $target eq 'grade' && $Apache::inputtags::part eq '0' &&
440: $status eq 'CAN_ANSWER' ) {
441: # if part is zero, no <part>s existed, so we need to the grading
442: &Apache::inputtags::grade;
443: } elsif ( ($target eq 'web' || $target eq 'tex') &&
444: $Apache::inputtags::part eq '0' &&
445: $status ne 'UNCHECKEDOUT') {
446: # if part is zero, no <part>s existed, so we need show the current
447: # grading status
448: my $gradestatus = &Apache::inputtags::gradestatus($Apache::inputtags::part,$target);
449: $result.= $gradestatus;
450: }
451: if (
452: (($target eq 'web') && ($ENV{'request.state'} ne 'construct')) ||
453: ($target eq 'answer') || ($target eq 'tex')
454: ) {
455: if ($status eq 'CAN_ANSWER') {
456: if ($target ne 'tex') {
457: $result.="</form></body>\n";
458: }
459: } elsif ($status eq 'SHOW_ANSWER' || $status eq 'CANNOT_ANSWER' ||
460: $status eq 'UNCHECKEDOUT' ) {
461: if ($target ne 'tex') {
462: $result.="</body>\n";
463: }
464: }
465: if ($target eq 'web') {
466: $result.=&Apache::lonxml::xmlend();
467: } elsif ($target eq 'tex') {
468: $result .= '\vskip 0.5mm\noindent\makebox[\textwidth/$number_of_columns][b]{\hrulefill}';
469: if (not $ENV{'request.symb'} =~ m/\.page_/) {
470: $result .= '\end{minipage}\end{document} ';
471: } else {
472: $result .= '';
473: }
474: }
475: }
476: if ($target eq 'grade') {
477: &Apache::lonhomework::showhash(%Apache::lonhomework::results);
478: &finalize_storage();
479: }
480: if ($target eq 'answer' && ($ENV{'request.state'} eq 'construct') ) {
481: $result.='</html>'; #normally we get it from xmlend, but in CSTR
482: # we always show answer mode too.
483: }
484: } elsif ($target eq 'meta') {
485: if ($Apache::inputtags::part eq '0') {
486: $result=&Apache::response::mandatory_part_meta;
487: }
488: } elsif ($target eq 'edit') {
489: &Apache::lonxml::debug("in end_problem with $target, edit");
490: $result = &problem_edit_footer();
491: }
492:
493: undef(%Apache::lonhomework::history);
494: undef(%Apache::lonhomework::results);
495: undef($Apache::inputtags::part);
496: undef($Apache::lonhomework::parsing_a_problem);
497:
498: return $result;
499: }
500:
501:
502: sub start_library {
503: my ($target,$token,$tagstack,$parstack,$parser,$safeeval)=@_;
504: my ($result,$head_tag_start,$body_tag_start,$form_tag_start);
505:
506: if ($target eq 'edit') {
507: ($result,$head_tag_start,$body_tag_start,$form_tag_start)=
508: &page_start($target,$token,$tagstack,$parstack,$parser,$safeeval);
509: $result.=$head_tag_start."</head>".$body_tag_start.$form_tag_start.
510: &problem_edit_header();
511: my $temp=&Apache::edit::insertlist($target,$token);
512: $result.=$temp;
513: } elsif ($target eq 'modified') {
514: $result=$token->[4];
515: $result.=&Apache::edit::handle_insert();
516: } elsif ($target eq 'web' && $$tagstack[0] ne 'problem' &&
517: $ENV{'request.state'} eq "construct" ) {
518: ($result,$head_tag_start,$body_tag_start,$form_tag_start)=
519: &page_start($target,$token,$tagstack,$parstack,$parser,$safeeval);
520: my $name=&get_resource_name($parstack,$safeeval);
521: my $rndseed=&setup_rndseed($safeeval);
522: $result.="$head_tag_start<title>$name</title></head>
523: $body_tag_start \n $form_tag_start".
524: '<input type="hidden" name="submitted" value="yes" />';
525: $result.=&problem_web_to_edit_header($rndseed);
526: }
527: return $result;
528: }
529:
530: sub end_library {
531: my ($target,$token,$tagstack,$parstack,$parser,$safeeval)=@_;
532: my $result='';
533: if ($target eq 'edit') {
534: $result=&problem_edit_footer();
535: } elsif ($target eq 'web' && $$tagstack[0] ne 'problem' &&
536: $ENV{'request.state'} eq "construct") {
537: $result.='</form></body>'.&Apache::lonxml::xmlend();
538: }
539: return $result;
540: }
541:
542: sub start_block {
543: my ($target,$token,$tagstack,$parstack,$parser,$safeeval)=@_;
544:
545: my $result;
546:
547: if ($target eq 'web' || $target eq 'grade' || $target eq 'answer' ||
548: $target eq 'tex' || $target eq 'analyze') {
549: my $code = $token->[2]->{'condition'};
550: if ($code) {
551: if (!$Apache::lonxml::default_homework_loaded) {
552: &Apache::lonxml::default_homework_load($safeeval);
553: }
554: $result = &Apache::run::run($code,$safeeval);
555: &Apache::lonxml::debug("block :$code: returned :$result:");
556: } else {
557: $result='1';
558: }
559: if ( ! $result ) {
560: my $skip=&Apache::lonxml::get_all_text("/block",$parser);
561: &Apache::lonxml::debug("skipping ahead :$skip: $$parser[-1]");
562: }
563: $result='';
564: } elsif ($target eq 'edit') {
565: $result .=&Apache::edit::tag_start($target,$token);
566: $result .=&Apache::edit::text_arg('Test Condition:','condition',
567: $token,40);
568: $result .=&Apache::edit::end_row().&Apache::edit::start_spanning_row();
569: } elsif ($target eq 'modified') {
570: my $constructtag=&Apache::edit::get_new_args($token,$parstack,
571: $safeeval,'condition');
572: if ($constructtag) { $result = &Apache::edit::rebuild_tag($token); }
573: }
574: return $result;
575: }
576:
577: sub end_block {
578: my ($target,$token,$tagstack,$parstack,$parser,$safeeval)=@_;
579: my $result;
580: if ($target eq "edit") {
581: $result.= &Apache::edit::tag_end($target,$token,'');
582: }
583: return $result;
584: }
585:
586: sub start_while {
587: my ($target,$token,$tagstack,$parstack,$parser,$safeeval)=@_;
588:
589: my $result;
590: if ($target eq 'web' || $target eq 'grade' || $target eq 'answer' ||
591: $target eq 'tex' || $target eq 'analyze') {
592: my $code = $token->[2]->{'condition'};
593:
594: push( @Apache::structuretags::whileconds, $code);
595: if (!$Apache::lonxml::default_homework_loaded) {
596: &Apache::lonxml::default_homework_load($safeeval);
597: }
598: my $result = &Apache::run::run($code,$safeeval);
599: my $bodytext=&Apache::lonxml::get_all_text("/while",$parser);
600: push( @Apache::structuretags::whilebody, $bodytext);
601: push( @Apache::structuretags::whileline, $token->[5]);
602: &Apache::lonxml::debug("s code $code got -$result-");
603: if ( $result ) {
604: &Apache::lonxml::newparser($parser,\$bodytext);
605: }
606: } elsif ($target eq 'edit') {
607: $result .=&Apache::edit::tag_start($target,$token);
608: $result .=&Apache::edit::text_arg('Test Condition:','condition',
609: $token,40);
610: $result .=&Apache::edit::end_row().&Apache::edit::start_spanning_row();
611: } elsif ($target eq 'modified') {
612: my $constructtag=&Apache::edit::get_new_args($token,$parstack,
613: $safeeval,'condition');
614: if ($constructtag) { $result = &Apache::edit::rebuild_tag($token); }
615: }
616: return $result;
617: }
618:
619: sub end_while {
620: my ($target,$token,$tagstack,$parstack,$parser,$safeeval)=@_;
621: my $result;
622:
623: if ($target eq 'web' || $target eq 'grade' || $target eq 'answer' ||
624: $target eq 'tex' || $target eq 'analyze') {
625: my $code = pop(@Apache::structuretags::whileconds);
626: my $bodytext = pop(@Apache::structuretags::whilebody);
627: my $line = pop(@Apache::structuretags::whileline);
628: my $return = &Apache::run::run($code,$safeeval);
629: my $starttime=time;
630: my $error=0;
631: while ($return) {
632: if (time-$starttime >
633: $Apache::lonnet::perlvar{'lonScriptTimeout'}) {
634: $return = 0; $error=1; next;
635: }
636: $result.=&Apache::scripttag::xmlparse($bodytext);
637: $return = &Apache::run::run($code,$safeeval);
638: }
639: if ($error) {
640: &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>');
641: }
642: } elsif ($target eq "edit") {
643: $result.= &Apache::edit::tag_end($target,$token,'');
644: }
645: return $result;
646: }
647:
648: # <randomlist show="1">
649: # <tag1>..</tag1>
650: # <tag2>..</tag2>
651: # <tag3>..</tag3>
652: # ...
653: # </randomlist>
654: sub start_randomlist {
655: my ($target,$token,$tagstack,$parstack,$parser,$safeeval)=@_;
656: my $result;
657: if ($target eq 'answer' || $target eq 'grade' || $target eq 'web' ||
658: $target eq 'tex' || $target eq 'analyze') {
659: my $body= &Apache::lonxml::get_all_text("/randomlist",$parser);
660: my $b_parser= HTML::TokeParser->new(\$body);
661: my $b_tok;
662: my @randomlist;
663: my $list_item;
664: while($b_tok = $b_parser->get_token() ) {
665: if($b_tok->[0] eq 'S') { # start tag
666: # get content of the tag until matching end tag
667: # get all text upto the matching tag
668: # and push the content into @randomlist
669: $list_item = &Apache::lonxml::get_all_text('/'.$b_tok->[1],
670: $b_parser);
671: $list_item = "$b_tok->[4]"."$list_item"."</$b_tok->[1]>";
672: push(@randomlist,$list_item);
673: # print "<br /><b>START-TAG $b_tok->[1], $b_tok->[4],
674: # $list_item</b>";
675: }
676: if($b_tok->[0] eq 'T') { # text
677: # what to do with text in between tags?
678: # print "<b>TEXT $b_tok->[1]</b><br />";
679: }
680: # if($b_tok->[0] eq 'E') { # end tag, should not happen
681: # print "<b>END-TAG $b_tok->[1]</b><br />";
682: # }
683: }
684: my @idx_arr = (0 .. $#randomlist);
685: &Apache::structuretags::shuffle(\@idx_arr);
686: my $bodytext = '';
687: my $show=$#randomlist;
688: my $showarg=&Apache::lonxml::get_param('show',$parstack,$safeeval);
689: $showarg--;
690: if ( ($showarg >= 0) && ($showarg < $show) ) { $show = $showarg; }
691: for(0 .. $show) {
692: $bodytext .= "$randomlist[ $idx_arr[$_] ]";
693: }
694: &Apache::lonxml::newparser($parser,\$bodytext);
695: } elsif ($target eq 'edit' ) {
696: $result .=&Apache::edit::tag_start($target,$token);
697: $result .=&Apache::edit::text_arg('Maximum Tags to Show:','show',
698: $token,5);
699: $result .=&Apache::edit::end_row().&Apache::edit::start_spanning_row();
700: } elsif ($target eq 'modified' ) {
701: my $constructtag=&Apache::edit::get_new_args($token,$parstack,
702: $safeeval,'show');
703: if ($constructtag) { $result = &Apache::edit::rebuild_tag($token); }
704: }
705: return $result;
706: }
707:
708: sub shuffle {
709: my $a=shift;
710: my $i;
711: if (defined(@$a)) {
712: &Apache::response::setrandomnumber();
713: for($i=@$a;--$i;) {
714: my $j=int(&Math::Random::random_uniform() * ($i+1));
715: next if $i == $j;
716: @$a[$i,$j] = @$a[$j,$i];
717: }
718: }
719: }
720:
721: sub end_randomlist {
722: my ($target,$token,$tagstack,$parstack,$parser,$safeeval)=@_;
723: my $result;
724: if ($target eq 'edit' ) {
725: $result=&Apache::edit::tag_end($target,$token,
726: 'End Randomly Parsed Block');
727: }
728: return $result;
729: }
730:
731: sub start_part {
732: my ($target,$token,$tagstack,$parstack,$parser,$safeeval)=@_;
733: my $result='';
734: my $id= &Apache::lonxml::get_param('id',$parstack,$safeeval);
735: if ($id eq '') { $id = $Apache::lonxml::curdepth; }
736: $Apache::inputtags::part=$id;
737: @Apache::inputtags::responselist = ();
738: @Apache::inputtags::previous=();
739: @Apache::inputtags::previous_version=();
740: my $hidden=&Apache::loncommon::check_if_partid_hidden($Apache::inputtags::part);
741:
742: if ($target eq 'meta') {
743: return &Apache::response::mandatory_part_meta;
744: } elsif ($target eq 'web' || $target eq 'grade' ||
745: $target eq 'answer' || $target eq 'tex') {
746: if ($hidden) {
747: my $bodytext=&Apache::lonxml::get_all_text("/part",$parser);
748: } else {
749: my ($status,$accessmsg) = &Apache::lonhomework::check_access($id);
750: push (@Apache::inputtags::status,$status);
751: my $expression='$external::datestatus="'.$status.'";';
752: $expression.='$external::gradestatus="'.$Apache::lonhomework::history{"resource.$id.solved"}.'";';
753: &Apache::run::run($expression,$safeeval);
754: if ( $status eq 'CLOSED' ) {
755: my $bodytext=&Apache::lonxml::get_all_text("/part",$parser);
756: if ( $target eq "web" ) {
757: $result="<br />Part is not open to be viewed. It $accessmsg<br />";
758: } elsif ( $target eq 'tex' ) {
759: $result="\\end{minipage}\\vskip 0 mm Part is not open to be viewed. It $accessmsg \\\\\\begin{minipage}{\\textwidth}";
760: }
761: } else {
762: if ($target eq 'tex') {
763: $result.='\noindent \end{minipage}\vskip 0 mm \noindent \begin{minipage}{\textwidth}\noindent';
764: my $weight = &Apache::lonnet::EXT("resource.$id.weight");
765: if ($Apache::lonhomework::type eq 'exam') { $result .= '\fbox{\textit{'.$weight.' pt}}';}
766: }
767: }
768: }
769: } elsif ($target eq 'edit') {
770: $result.=&Apache::edit::tag_start($target,$token);
771: $result.=&Apache::edit::text_arg('Part ID:','id',$token).
772: &Apache::loncommon::help_open_topic("Part_Tag_Edit_Help").
773: &Apache::edit::end_row().&Apache::edit::start_spanning_row();
774: } elsif ($target eq 'modified') {
775: my $constructtag=&Apache::edit::get_new_args($token,$parstack,
776: $safeeval,'id');
777: if ($constructtag) {
778: $result = &Apache::edit::rebuild_tag($token);
779: $result.=&Apache::edit::handle_insert();
780: }
781: }
782: return $result;
783: }
784:
785: sub end_part {
786: my ($target,$token,$tagstack,$parstack,$parser,$safeeval)=@_;
787: &Apache::lonxml::debug("in end_part $target ");
788: my $status=$Apache::inputtags::status['-1'];
789: my $hidden=&Apache::loncommon::check_if_partid_hidden($Apache::inputtags::part);
790: my $result='';
791: if ( $target eq 'meta' ) {
792: $result='';
793: } elsif ( $target eq 'grade' && $status eq 'CAN_ANSWER' && !$hidden) {
794: $result=&Apache::inputtags::grade;
795: } elsif (($target eq 'web' || $target eq 'tex') && !$hidden ) {
796: my $gradestatus=&Apache::inputtags::gradestatus($Apache::inputtags::part,
797: $target);
798: if ($Apache::lonhomework::type eq 'exam') {$gradestatus='';}
799: $result=$gradestatus;
800: }
801: pop @Apache::inputtags::status;
802: $Apache::inputtags::part='';
803: return $result;
804: }
805:
806: sub start_preduedate {
807: my ($target,$token,$tagstack,$parstack,$parser,$safeeval)=@_;
808: if ($target eq 'web' || $target eq 'grade' || $target eq 'answer' || $target eq 'tex') {
809: if ($Apache::inputtags::status['-1'] ne 'CAN_ANSWER' &&
810: $Apache::inputtags::status['-1'] ne 'CANNOT_ANSWER' &&
811: $Apache::inputtags::status['-1'] ne 'SHOW_ANSWER') {
812: &Apache::lonxml::get_all_text("/preduedate",$parser);
813: }
814: }
815: return '';
816: }
817:
818: sub end_preduedate {
819: return '';
820: }
821:
822: sub start_postanswerdate {
823: my ($target,$token,$tagstack,$parstack,$parser,$safeeval)=@_;
824: if ($target eq 'web' || $target eq 'grade' || $target eq 'tex') {
825: if ($Apache::inputtags::status['-1'] ne 'SHOW_ANSWER') {
826: &Apache::lonxml::get_all_text("/postanswerdate",$parser);
827: }
828: } elsif ($target eq 'tex') {
829: return '\vskip 0 mm \noindent';
830: }
831: return '';
832: }
833:
834: sub end_postanswerdate {
835: return '';
836: }
837:
838: sub start_notsolved {
839: my ($target,$token,$tagstack,$parstack,$parser,$safeeval)=@_;
840: if ($target eq 'web' || $target eq 'grade' || $target eq 'answer' ||
841: $target eq 'tex') {
842: my $gradestatus=$Apache::lonhomework::history{"resource.$Apache::inputtags::part.solved"};
843: &Apache::lonxml::debug("not solved has :$gradestatus:");
844: if ($gradestatus =~ /^correct/) {
845: &Apache::lonxml::debug("skipping");
846: &Apache::lonxml::get_all_text("/notsolved",$parser);
847: }
848: }
849: return '';
850: }
851:
852: sub end_notsolved {
853: return '';
854: }
855:
856: sub start_solved {
857: my ($target,$token,$tagstack,$parstack,$parser,$safeeval)=@_;
858: if ($target eq 'web' || $target eq 'grade' || $target eq 'answer' ||
859: $target eq 'tex') {
860: my $gradestatus=$Apache::lonhomework::history{"resource.$Apache::inputtags::part.solved"};
861: if ($gradestatus !~ /^correct/) {
862: &Apache::lonxml::get_all_text("/solved",$parser);
863: }
864: }
865: return '';
866: }
867:
868: sub end_solved {
869: return '';
870: }
871:
872: sub start_startouttext {
873: my ($target,$token,$tagstack,$parstack,$parser,$safeeval)=@_;
874: my @result=(''.'');
875: if ($target eq 'edit' || $target eq 'modified' ) { @result=('','no'); }
876: return (@result);
877: }
878:
879: sub end_startouttext {
880: my ($target,$token,$tagstack,$parstack,$parser,$safeeval)=@_;
881: my $result='';
882: my $text='';
883:
884: if ($target eq 'edit') {
885: $text=&Apache::lonxml::get_all_text("endouttext",$parser);
886: $result.=&Apache::edit::start_table($token)."<tr><td>Text Block</td>
887: <td>Delete:".
888: &Apache::edit::deletelist($target,$token)
889: ."</td>
890: <td>".
891: &Apache::edit::insertlist($target,$token).
892: &Apache::edit::end_row().
893: &Apache::edit::start_spanning_row()."\n"
894: .'<table><tr><td>'.
895: &Apache::loncommon::help_open_topic("Greek_Symbols",
896: 'Greek Symbols',
897: undef,undef,600)
898: .'</td><td>'.
899: &Apache::loncommon::help_open_topic("Other_Symbols",
900: 'Other Symbols',
901: undef,undef,600)
902: .'</td></tr></table>'.
903: &Apache::edit::editfield($token->[1],$text,"",80,4);
904: }
905: if ($target eq 'modified') {
906: $text=&Apache::lonxml::get_all_text("endouttext",$parser);
907: $result='<startouttext />'.&Apache::edit::modifiedfield();
908: }
909: if ($target eq 'tex') {
910: $result .= '\noindent ';
911: }
912: return $result;
913: }
914:
915: sub start_endouttext {
916: my ($target,$token,$tagstack,$parstack,$parser,$safeeval)=@_;
917: my $result='';
918: if ($target eq "edit" ) { $result="</td></tr>".&Apache::edit::end_table()."\n"; }
919: if ($target eq "modified") {
920: $result='<endouttext />'.
921: &Apache::edit::handle_insertafter('startouttext'); }
922: return $result;
923: }
924:
925: sub end_endouttext {
926: my ($target,$token,$tagstack,$parstack,$parser,$safeeval)=@_;
927: my @result=('','');
928: if ($target eq "edit" || $target eq 'modified') { @result=('','no'); }
929: return (@result);
930: }
931:
932: sub delete_startouttext {
933: my ($target,$token,$tagstack,$parstack,$parser,$safeeval)=@_;
934: # my $text=&Apache::lonxml::get_all_text("endouttext",$parser);
935: my $text=$$parser['-1']->get_text("/endouttext");
936: my $ntoken=$$parser['-1']->get_token();
937: &Apache::lonxml::debug("Deleting :$text: and :$ntoken->[0]:$ntoken->[1]:$ntoken->[2]: for startouttext");
938: &Apache::lonxml::end_tag($tagstack,$parstack,$ntoken);
939: # Deleting 2 parallel tag pairs, but we need the numbers later to look like
940: # they did the last time round
941: &Apache::lonxml::increasedepth($ntoken);
942: &Apache::lonxml::decreasedepth($ntoken);
943: return 1;
944: }
945:
946: 1;
947: __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