1: # The LearningOnline Network with CAPA
2: # definition of tags that give a structure to a document
3: #
4: # $Id: structuretags.pm,v 1.156 2003/03/14 23:23:45 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::inputtags::previous_version=();
258: $Apache::structuretags::printanswer='No';
259: if ($target ne 'analyze') {
260: &initialize_storage();
261: if ($target eq 'web') {
262: &Apache::lonhomework::showhash(%Apache::lonhomework::history);
263: }
264: $Apache::lonhomework::type=&Apache::lonnet::EXT('resource.0.type');
265: &Apache::lonxml::debug("Found this to be of type :$Apache::lonhomework::type:");
266: }
267: if ($Apache::lonhomework::type eq '') {
268: my $uri=$ENV{'request.uri'};
269: if ($uri=~/\.(\w+)$/) {
270: $Apache::lonhomework::type=$1;
271: &Apache::lonxml::debug("Using type of $1");
272: } else {
273: $Apache::lonhomework::type='problem';
274: &Apache::lonxml::debug("Using default type, problem, :$uri:");
275: }
276: }
277:
278: #added vars to the scripting enviroment
279: my $expression='$external::part='.$Apache::inputtags::part.';';
280: &Apache::run::run($expression,$safeeval);
281: my $status;
282: my $accessmsg;
283:
284: #should get back a <html> or the neccesary stuff to start XML/MathML
285: my ($result,$head_tag_start,$body_tag_start,$form_tag_start)=
286: &page_start($target,$token,$tagstack,$parstack,$parser,$safeeval);
287: if ($target eq 'tex' and $ENV{'request.symb'} =~ m/\.page_/) { $result = '';}
288:
289: if ($target eq 'analyze') { my $rndseed=&setup_rndseed($safeeval); }
290: if ($target eq 'web' || $target eq 'grade' || $target eq 'answer' || $target eq 'tex') {
291: #handle exam checkout
292: if ($Apache::lonhomework::type eq 'exam') {
293: my $token=$Apache::lonhomework::history{"resource.0.outtoken"};
294: if (($ENV{'form.doescheckout'}) && (!$token)) {
295: $token=&Apache::lonxml::maketoken();
296: $Apache::lonhomework::history{"resource.0.outtoken"}=$token;
297: }
298: $body_tag_start.=&Apache::lonxml::printtokenheader($target,$token);
299: }
300:
301: #handle rand seed in construction space
302: my $rndseed=&setup_rndseed($safeeval);
303: ($status,$accessmsg) = &Apache::lonhomework::check_access('0');
304: push (@Apache::inputtags::status,$status);
305: my $expression='$external::datestatus="'.$status.'";';
306: $expression.='$external::gradestatus="'.$Apache::lonhomework::history{"resource.0.solved"}.'";';
307: &Apache::run::run($expression,$safeeval);
308: &Apache::lonxml::debug("Got $status");
309: if (( $status eq 'CLOSED' ) ||
310: ( $status eq 'UNCHECKEDOUT') ||
311: ( $status eq 'BANNED') ||
312: ( $status eq 'UNAVAILABLE')) {
313: my $bodytext=&Apache::lonxml::get_all_text("/problem",$parser);
314: if ( $target eq "web" ) {
315: $result.= $head_tag_start.'</head>';
316: my $msg=$body_tag_start;
317: if ($status eq 'UNAVAILABLE') {
318: $result.='<h1>Unable to determine if this resource is open due to network problems. Please try again later.</h1>';
319: } else {
320: $result.='<h1>Not open to be viewed</h1>';
321: }
322: if ($status eq 'CLOSED') {
323: $msg.='The problem '.$accessmsg;
324: } elsif ($status eq 'UNCHECKEDOUT') {
325: $msg.=&checkout_msg;
326: }
327: $result.=$msg.'<br />';
328: } elsif ($target eq 'tex') {
329: $result.='\begin{document}\noindent \vskip 1 mm \begin{minipage}{\textwidth}\vskip 0 mm';
330: if ($status eq 'UNAVAILABLE') {
331: $result.='Unable to determine if this resource is open due to network problems. Please try again later.\vskip 0 mm ';
332: } else {
333: $result.="Problem is not open to be viewed. It $accessmsg \\vskip 0 mm ";
334: }
335: }
336: } elsif ($target eq 'web') {
337: my $name= &get_resource_name($parstack,$safeeval);
338: if ($status eq 'CAN_ANSWER') {
339: # create a page header and exit
340: $result.="$head_tag_start<title>$name</title></head>
341: $body_tag_start \n $form_tag_start".
342: '<input type="hidden" name="submitted" value="yes" />';
343: if ($ENV{'request.state'} eq "construct") {
344: $result.= &problem_web_to_edit_header($rndseed);
345: }
346: # if we are viewing someone else preserve that info
347: if (defined $ENV{'form.grade_symb'}) {
348: foreach my $field ('symb','courseid','domain','username') {
349: $result .= '<input type="hidden" name="grade_'.$field.
350: '" value="'.$ENV{"form.grade_$field"}.'" />'."\n";
351: }
352: }
353: } elsif ($status eq 'SHOW_ANSWER' || $status eq 'CANNOT_ANSWER'
354: || $status eq 'CLOSED' || $status eq 'UNAVALAILABLE') {
355: $result.=$head_tag_start.
356: "<title>$name</title></head>\n$body_tag_start\n";
357: }
358: } elsif ($target eq 'tex') {
359: my $name= &Apache::lonxml::get_param('name',$parstack,$safeeval);
360: if ($name eq '') {
361: $name=&Apache::lonnet::EXT('resource.title');
362: if ($name eq 'con_lost') { $name = ''; }
363: }
364: $Apache::lonhomework::name=$name;
365: my $id = $Apache::inputtags::part;
366: my $weight = &Apache::lonnet::EXT("resource.$id.weight");
367: my $allkeys = &Apache::lonnet::metadata($ENV{'request.uri'},'keys');
368: my @allkeys = split /,/,$allkeys;
369: my $allow_print_points = 0;
370: foreach my $partial_key (@allkeys) {
371: if ($partial_key=~m/weight/) {
372: $allow_print_points++;
373: }
374: }
375: my $duedate = &Apache::lonnet::EXT("resource.$id.duedate");
376: $duedate = POSIX::strftime("%c",localtime($duedate));
377: my $temp_file;
378: my $filename = "/home/httpd/prtspool/$ENV{'user.name'}_$ENV{'user.domain'}_printout.due";
379: if (-e $filename) {
380: $temp_file = Apache::File->new($filename);
381: } else {
382: $temp_file = Apache::File->new('>>'.$filename);
383: }
384: my @due_file_content = <$temp_file>;
385: my $due_file_content = $due_file_content[$#due_file_content];
386: chomp $due_file_content;
387: my $name_of_resourse= &get_resource_name($parstack,$safeeval);
388: if ($due_file_content ne $duedate) {
389: $temp_file = Apache::File->new('>'.$filename);
390: print $temp_file "$duedate\n";
391: if (not $ENV{'request.symb'} =~ m/\.page_/) {
392: if(not $duedate=~m/1969/ and $Apache::lonhomework::type ne 'exam') {
393: $result .= '\begin{document} \typeout{STAMPOFPASSEDRESOURCESTART Resource <h2>"'.$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}';
394: } else {
395: $result .= '\begin{document} \typeout{STAMPOFPASSEDRESOURCESTART Resource <h2>"'.$name_of_resourse.'"</h2> located in <br /><small><b>'.$ENV{'request.uri'}.'</b></small><br /> STAMPOFPASSEDRESOURCEEND} \noindent \vskip 1 mm \noindent\begin{minipage}{\textwidth}';
396: if ($Apache::lonhomework::type eq 'exam' and $allow_print_points==1) { $result .= '\fbox{\textit{'.$weight.' pt}}';}
397: }
398: } else {
399: $result .= '\vskip 1mm\textit{Due date: '.$duedate.'} \\\\\\\\';
400: }
401: } else {
402: if (not $ENV{'request.symb'} =~ m/\.page_/) {
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: } else {
406: $result .= '\vskip 1mm \\\\\\\\';
407: }
408: }
409: }
410: } elsif ($target eq 'edit') {
411: $result.=$head_tag_start."</head>".$body_tag_start.$form_tag_start.
412: &problem_edit_header();
413: my $temp=&Apache::edit::insertlist($target,$token);
414: $result.=$temp;
415: } elsif ($target eq 'modified') {
416: $result=$token->[4];
417: $result.=&Apache::edit::handle_insert();
418: } else {
419: # page_start returned a starting result, delete it if we don't need it
420: $result = '';
421: }
422: return $result;
423: }
424:
425: sub end_problem {
426: my ($target,$token,$tagstack,$parstack,$parser,$safeeval)=@_;
427: my $result='';
428: my $status=$Apache::inputtags::status['-1'];
429: if ($target eq 'grade' || $target eq 'web' || $target eq 'answer' || $target eq 'tex') {
430: if ( $target eq 'grade' && $Apache::inputtags::part eq '0' && $status eq 'CAN_ANSWER' ) {
431: # if part is zero, no <part>s existed, so we need to the grading
432: &Apache::inputtags::grade;
433: } elsif ( ($target eq 'web' || $target eq 'tex') && $Apache::inputtags::part eq '0' &&
434: $status ne 'UNCHECKEDOUT') {
435: # if part is zero, no <part>s existed, so we need show the current
436: # grading status
437: my $gradestatus = &Apache::inputtags::gradestatus($Apache::inputtags::part,$target);
438: if ($Apache::lonhomework::type ne 'exam') {$result.= $gradestatus;}
439: }
440: if (
441: (($target eq 'web') && ($ENV{'request.state'} ne 'construct')) ||
442: ($target eq 'answer') || ($target eq 'tex')
443: ) {
444: if ($status eq 'CAN_ANSWER') {
445: if ($target ne 'tex') {
446: $result.="</form></body>\n";
447: }
448: } elsif ($status eq 'SHOW_ANSWER' || $status eq 'CANNOT_ANSWER' ||
449: $status eq 'UNCHECKEDOUT' ) {
450: if ($target ne 'tex') {
451: $result.="</body>\n";
452: }
453: }
454: if ($target eq 'web') {
455: $result.=&Apache::lonxml::xmlend();
456: } elsif ($target eq 'tex') {
457: $result .= '\vskip 0.5mm\noindent\makebox[\textwidth/$number_of_columns][b]{\hrulefill}';
458: if (not $ENV{'request.symb'} =~ m/\.page_/) {
459: $result .= '\end{minipage}\end{document} ';
460: } else {
461: $result .= '';
462: }
463: }
464: }
465: if ($target eq 'grade') {
466: &Apache::lonhomework::showhash(%Apache::lonhomework::results);
467: &finalize_storage();
468: }
469: if ($target eq 'answer' && ($ENV{'request.state'} eq 'construct') ) {
470: $result.='</html>'; #normally we get it from xmlend, but in CSTR
471: # we always show answer mode too.
472: }
473: } elsif ($target eq 'meta') {
474: if ($Apache::inputtags::part eq '0') {
475: $result=&Apache::response::mandatory_part_meta;
476: }
477: } elsif ($target eq 'edit') {
478: &Apache::lonxml::debug("in end_problem with $target, edit");
479: $result = &problem_edit_footer();
480: }
481:
482: undef(%Apache::lonhomework::history);
483: undef(%Apache::lonhomework::results);
484: undef($Apache::inputtags::part);
485: undef($Apache::lonhomework::parsing_a_problem);
486:
487: return $result;
488: }
489:
490:
491: sub start_library {
492: my ($target,$token,$tagstack,$parstack,$parser,$safeeval)=@_;
493: my ($result,$head_tag_start,$body_tag_start,$form_tag_start);
494:
495: if ($target eq 'edit') {
496: ($result,$head_tag_start,$body_tag_start,$form_tag_start)=
497: &page_start($target,$token,$tagstack,$parstack,$parser,$safeeval);
498: $result.=$head_tag_start."</head>".$body_tag_start.$form_tag_start.
499: &problem_edit_header();
500: my $temp=&Apache::edit::insertlist($target,$token);
501: $result.=$temp;
502: } elsif ($target eq 'modified') {
503: $result=$token->[4];
504: $result.=&Apache::edit::handle_insert();
505: } elsif ($target eq 'web' && $$tagstack[0] ne 'problem' &&
506: $ENV{'request.state'} eq "construct" ) {
507: ($result,$head_tag_start,$body_tag_start,$form_tag_start)=
508: &page_start($target,$token,$tagstack,$parstack,$parser,$safeeval);
509: my $name=&get_resource_name($parstack,$safeeval);
510: my $rndseed=&setup_rndseed($safeeval);
511: $result.="$head_tag_start<title>$name</title></head>
512: $body_tag_start \n $form_tag_start".
513: '<input type="hidden" name="submitted" value="yes" />';
514: $result.=&problem_web_to_edit_header($rndseed);
515: }
516: return $result;
517: }
518:
519: sub end_library {
520: my ($target,$token,$tagstack,$parstack,$parser,$safeeval)=@_;
521: my $result='';
522: if ($target eq 'edit') {
523: $result=&problem_edit_footer();
524: } elsif ($target eq 'web' && $$tagstack[0] ne 'problem' &&
525: $ENV{'request.state'} eq "construct") {
526: $result.='</form></body>'.&Apache::lonxml::xmlend();
527: }
528: return $result;
529: }
530:
531: sub start_block {
532: my ($target,$token,$tagstack,$parstack,$parser,$safeeval)=@_;
533:
534: my $result;
535:
536: if ($target eq 'web' || $target eq 'grade' || $target eq 'answer' ||
537: $target eq 'tex' || $target eq 'analyze') {
538: my $code = @$parstack[$#$parstack];
539: if ($code) {
540: $code =~ s/\"//g;
541: $code .=';return $condition;';
542: if (!$Apache::lonxml::default_homework_loaded) {
543: &Apache::lonxml::default_homework_load($safeeval);
544: }
545: $result = &Apache::run::run($code,$safeeval);
546: &Apache::lonxml::debug("block :$code: returned :$result:");
547: } else {
548: $result='1';
549: }
550: if ( ! $result ) {
551: my $skip=&Apache::lonxml::get_all_text("/block",$parser);
552: &Apache::lonxml::debug("skipping ahead :$skip: $$parser[-1]");
553: }
554: $result='';
555: } elsif ($target eq 'edit') {
556: $result .=&Apache::edit::tag_start($target,$token);
557: $result .=&Apache::edit::text_arg('Test Condition:','condition',
558: $token,40);
559: $result .=&Apache::edit::end_row().&Apache::edit::start_spanning_row();
560: } elsif ($target eq 'modified') {
561: my $constructtag=&Apache::edit::get_new_args($token,$parstack,
562: $safeeval,'condition');
563: if ($constructtag) { $result = &Apache::edit::rebuild_tag($token); }
564: }
565: return $result;
566: }
567:
568: sub end_block {
569: return '';
570: }
571:
572: sub start_while {
573: my ($target,$token,$tagstack,$parstack,$parser,$safeeval)=@_;
574:
575: my $code = @$parstack[$#$parstack];
576: $code =~ s/\"//g;
577: $code .=';return $condition;';
578:
579: push( @Apache::structuretags::whileconds, $code);
580: if (!$Apache::lonxml::default_homework_loaded) {
581: &Apache::lonxml::default_homework_load($safeeval);
582: }
583: my $result = &Apache::run::run($code,$safeeval);
584: my $bodytext=$$parser[$#$parser]->get_text("/while");
585: push( @Apache::structuretags::whilebody, $bodytext);
586: if ( $result ) {
587: &Apache::lonxml::newparser($parser,\$bodytext);
588: }
589: return "";
590: }
591:
592: sub end_while {
593: my ($target,$token,$tagstack,$parstack,$parser,$safeeval)=@_;
594: my $code = pop @Apache::structuretags::whileconds;
595: my $bodytext = pop @Apache::structuretags::whilebody;
596: my $result = &Apache::run::run($code,$safeeval);
597: if ( $result ) {
598: &Apache::lonxml::newparser($parser,\$bodytext);
599: }
600: return "";
601: }
602:
603: # <randomlist show="1">
604: # <tag1>..</tag1>
605: # <tag2>..</tag2>
606: # <tag3>..</tag3>
607: # ...
608: # </randomlist>
609: sub start_randomlist {
610: my ($target,$token,$tagstack,$parstack,$parser,$safeeval)=@_;
611: my $result;
612: if ($target eq 'answer' || $target eq 'grade' || $target eq 'web' ||
613: $target eq 'tex' || $target eq 'analyze') {
614: my $body= &Apache::lonxml::get_all_text("/randomlist",$parser);
615: my $b_parser= HTML::TokeParser->new(\$body);
616: my $b_tok;
617: my @randomlist;
618: my $list_item;
619: while($b_tok = $b_parser->get_token() ) {
620: if($b_tok->[0] eq 'S') { # start tag
621: # get content of the tag until matching end tag
622: # get all text upto the matching tag
623: # and push the content into @randomlist
624: $list_item = &Apache::lonxml::get_all_text('/'.$b_tok->[1],$b_parser);
625: $list_item = "$b_tok->[4]"."$list_item"."</$b_tok->[1]>";
626: push(@randomlist,$list_item);
627: # print "<br /><b>START-TAG $b_tok->[1], $b_tok->[4], $list_item</b>";
628: }
629: if($b_tok->[0] eq 'T') { # text
630: # what to do with text in between tags?
631: # print "<b>TEXT $b_tok->[1]</b><br />";
632: }
633: # if($b_tok->[0] eq 'E') { # end tag, should not happen
634: # print "<b>END-TAG $b_tok->[1]</b><br />";
635: # }
636: }
637: my @idx_arr = (0 .. $#randomlist);
638: &Apache::structuretags::shuffle(\@idx_arr);
639: my $bodytext = '';
640: my $show=$#randomlist;
641: my $showarg=&Apache::lonxml::get_param('show',$parstack,$safeeval);
642: $showarg--;
643: if ( ($showarg >= 0) && ($showarg < $show) ) { $show = $showarg; }
644: for(0 .. $show) {
645: $bodytext .= "$randomlist[ $idx_arr[$_] ]";
646: }
647: &Apache::lonxml::newparser($parser,\$bodytext);
648: } elsif ($target eq 'edit' ) {
649: $result .= &Apache::edit::tag_start($target,$token);
650: $result .= &Apache::edit::text_arg('Maximum Tags to Show:','show',$token,5);
651: $result .= &Apache::edit::end_row().&Apache::edit::start_spanning_row();
652: } elsif ($target eq 'modified' ) {
653: my $constructtag=&Apache::edit::get_new_args($token,$parstack,$safeeval,
654: 'show');
655: if ($constructtag) { $result = &Apache::edit::rebuild_tag($token); }
656: }
657: return $result;
658: }
659:
660: sub shuffle {
661: my $a=shift;
662: my $i;
663: if (defined(@$a)) {
664: &Apache::response::setrandomnumber();
665: for($i=@$a;--$i;) {
666: my $j=int(&Math::Random::random_uniform() * ($i+1));
667: next if $i == $j;
668: @$a[$i,$j] = @$a[$j,$i];
669: }
670: }
671: }
672:
673: sub end_randomlist {
674: my ($target,$token,$tagstack,$parstack,$parser,$safeeval)=@_;
675: my $result;
676: if ($target eq 'edit' ) {
677: $result=&Apache::edit::tag_end($target,$token,'End Randomly Parsed Block');
678: }
679: return $result;
680: }
681:
682: sub start_part {
683: my ($target,$token,$tagstack,$parstack,$parser,$safeeval)=@_;
684: my $result='';
685: my $id= &Apache::lonxml::get_param('id',$parstack,$safeeval);
686: if ($id eq '') { $id = $Apache::lonxml::curdepth; }
687: $Apache::inputtags::part=$id;
688: @Apache::inputtags::responselist = ();
689: @Apache::inputtags::previous=();
690: @Apache::inputtags::previous_version=();
691: my $hidden=&Apache::loncommon::check_if_partid_hidden($Apache::inputtags::part);
692:
693: if ($target eq 'meta') {
694: return &Apache::response::mandatory_part_meta;
695: } elsif ($target eq 'web' || $target eq 'grade' ||
696: $target eq 'answer' || $target eq 'tex') {
697: if ($hidden) {
698: my $bodytext=&Apache::lonxml::get_all_text("/part",$parser);
699: } else {
700: my ($status,$accessmsg) = &Apache::lonhomework::check_access($id);
701: push (@Apache::inputtags::status,$status);
702: my $expression='$external::datestatus="'.$status.'";';
703: $expression.='$external::gradestatus="'.$Apache::lonhomework::history{"resource.$id.solved"}.'";';
704: &Apache::run::run($expression,$safeeval);
705: if ( $status eq 'CLOSED' ) {
706: my $bodytext=&Apache::lonxml::get_all_text("/part",$parser);
707: if ( $target eq "web" ) {
708: $result="<br />Part is not open to be viewed. It $accessmsg<br />";
709: } elsif ( $target eq 'tex' ) {
710: $result="\\end{minipage}\\vskip 0 mm Part is not open to be viewed. It $accessmsg \\\\\\begin{minipage}{\\textwidth}";
711: }
712: } else {
713: if ($target eq 'tex') {
714: $result.='\noindent \end{minipage}\vskip 0 mm \noindent \begin{minipage}{\textwidth}\noindent';
715: my $weight = &Apache::lonnet::EXT("resource.$id.weight");
716: if ($Apache::lonhomework::type eq 'exam') { $result .= '\fbox{\textit{'.$weight.' pt}}';}
717: }
718: }
719: }
720: } elsif ($target eq 'edit') {
721: $result.=&Apache::edit::tag_start($target,$token);
722: $result.=&Apache::edit::text_arg('Part ID:','id',$token).
723: &Apache::loncommon::help_open_topic("Part_Tag_Edit_Help").
724: &Apache::edit::end_row().&Apache::edit::start_spanning_row();
725:
726: } elsif ($target eq 'modified') {
727: my $constructtag=&Apache::edit::get_new_args($token,$parstack,$safeeval,
728: 'id');
729: if ($constructtag) {
730: $result = &Apache::edit::rebuild_tag($token);
731: $result.=&Apache::edit::handle_insert();
732: }
733: }
734: return $result;
735: }
736:
737: sub end_part {
738: my ($target,$token,$tagstack,$parstack,$parser,$safeeval)=@_;
739: &Apache::lonxml::debug("in end_part $target ");
740: my $status=$Apache::inputtags::status['-1'];
741: my $hidden=&Apache::loncommon::check_if_partid_hidden($Apache::inputtags::part);
742: my $result='';
743: if ( $target eq 'meta' ) {
744: $result='';
745: } elsif ( $target eq 'grade' && $status eq 'CAN_ANSWER' && !$hidden) {
746: $result=&Apache::inputtags::grade;
747: } elsif (($target eq 'web' || $target eq 'tex') && !$hidden ) {
748: my $gradestatus=&Apache::inputtags::gradestatus($Apache::inputtags::part,
749: $target);
750: if ($Apache::lonhomework::type eq 'exam') {$gradestatus='';}
751: $result=$gradestatus;
752: }
753: pop @Apache::inputtags::status;
754: $Apache::inputtags::part='';
755: return $result;
756: }
757:
758: sub start_preduedate {
759: my ($target,$token,$tagstack,$parstack,$parser,$safeeval)=@_;
760: if ($target eq 'web' || $target eq 'grade' || $target eq 'answer' || $target eq 'tex') {
761: if ($Apache::inputtags::status['-1'] ne 'CAN_ANSWER' &&
762: $Apache::inputtags::status['-1'] ne 'CANNOT_ANSWER' &&
763: $Apache::inputtags::status['-1'] ne 'SHOW_ANSWER') {
764: &Apache::lonxml::get_all_text("/preduedate",$parser);
765: }
766: }
767: return '';
768: }
769:
770: sub end_preduedate {
771: return '';
772: }
773:
774: sub start_postanswerdate {
775: my ($target,$token,$tagstack,$parstack,$parser,$safeeval)=@_;
776: if ($target eq 'web' || $target eq 'grade' || $target eq 'tex') {
777: if ($Apache::inputtags::status['-1'] ne 'SHOW_ANSWER') {
778: &Apache::lonxml::get_all_text("/postanswerdate",$parser);
779: }
780: } elsif ($target eq 'tex') {
781: return '\vskip 0 mm \noindent';
782: }
783: return '';
784: }
785:
786: sub end_postanswerdate {
787: return '';
788: }
789:
790: sub start_notsolved {
791: my ($target,$token,$tagstack,$parstack,$parser,$safeeval)=@_;
792: if ($target eq 'web' || $target eq 'grade' || $target eq 'answer' || $target eq 'tex') {
793: my $gradestatus=$Apache::lonhomework::history{"resource.$Apache::inputtags::part.solved"};
794: &Apache::lonxml::debug("not solved has :$gradestatus:");
795: if ($gradestatus =~ /^correct/) {
796: &Apache::lonxml::debug("skipping");
797: &Apache::lonxml::get_all_text("/notsolved",$parser);
798: }
799: }
800: return '';
801: }
802:
803: sub end_notsolved {
804: return '';
805: }
806:
807: sub start_solved {
808: my ($target,$token,$tagstack,$parstack,$parser,$safeeval)=@_;
809: if ($target eq 'web' || $target eq 'grade' || $target eq 'answer' || $target eq 'tex') {
810: my $gradestatus=$Apache::lonhomework::history{"resource.$Apache::inputtags::part.solved"};
811: if ($gradestatus !~ /^correct/) {
812: &Apache::lonxml::get_all_text("/solved",$parser);
813: }
814: }
815: return '';
816: }
817:
818: sub end_solved {
819: return '';
820: }
821:
822: sub start_startouttext {
823: my ($target,$token,$tagstack,$parstack,$parser,$safeeval)=@_;
824: my @result=(''.'');
825: if ($target eq 'edit' || $target eq 'modified' ) { @result=('','no'); }
826: return (@result);
827: }
828: sub end_startouttext {
829: my ($target,$token,$tagstack,$parstack,$parser,$safeeval)=@_;
830: my $result='';
831: my $text='';
832:
833: if ($target eq 'edit') {
834: $text=&Apache::lonxml::get_all_text("endouttext",$parser);
835: $result.=&Apache::edit::start_table($token)."<tr><td>Text Block</td>
836: <td>Delete:".
837: &Apache::edit::deletelist($target,$token)
838: ."</td>
839: <td>".
840: &Apache::edit::insertlist($target,$token).
841: &Apache::edit::end_row().&Apache::edit::start_spanning_row()."\n"
842: .'<table><tr><td>'.
843: &Apache::loncommon::help_open_topic("Greek_Symbols",'Greek Symbols',
844: undef,undef,600)
845: .'</td><td>'.
846: &Apache::loncommon::help_open_topic("Other_Symbols",'Other Symbols',
847: undef,undef,600)
848: .'</td></tr></table>'.
849: &Apache::edit::editfield($token->[1],$text,"",80,4);
850: }
851: if ($target eq 'modified') {
852: $text=&Apache::lonxml::get_all_text("endouttext",$parser);
853: $result='<startouttext />'.&Apache::edit::modifiedfield();
854: }
855: if ($target eq 'tex') {
856: $result .= '\noindent ';
857: }
858: return $result;
859: }
860: sub start_endouttext {
861: my ($target,$token,$tagstack,$parstack,$parser,$safeeval)=@_;
862: my $result='';
863: if ($target eq "edit" ) { $result="</td></tr>".&Apache::edit::end_table()."\n"; }
864: if ($target eq "modified") {
865: $result='<endouttext />'.
866: &Apache::edit::handle_insertafter('startouttext'); }
867: return $result;
868: }
869: sub end_endouttext {
870: my ($target,$token,$tagstack,$parstack,$parser,$safeeval)=@_;
871: my @result=('','');
872: if ($target eq "edit" || $target eq 'modified') { @result=('','no'); }
873: return (@result);
874: }
875: sub delete_startouttext {
876: my ($target,$token,$tagstack,$parstack,$parser,$safeeval)=@_;
877: # my $text=&Apache::lonxml::get_all_text("endouttext",$parser);
878: my $text=$$parser['-1']->get_text("/endouttext");
879: my $ntoken=$$parser['-1']->get_token();
880: &Apache::lonxml::debug("Deleting :$text: and :$ntoken->[0]:$ntoken->[1]:$ntoken->[2]: for startouttext");
881: &Apache::lonxml::end_tag($tagstack,$parstack,$ntoken);
882: # Deleting 2 parallel tag pairs, but we need the numbers later to look like
883: # they did the last time round
884: &Apache::lonxml::increasedepth($ntoken);
885: &Apache::lonxml::decreasedepth($ntoken);
886: return 1;
887: }
888:
889: 1;
890: __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