1: # The LearningOnline Network with CAPA
2: # definition of tags that give a structure to a document
3: #
4: # $Id: structuretags.pm,v 1.175 2003/05/15 21:44:23 albertel Exp $
5: #
6: # Copyright Michigan State University Board of Trustees
7: #
8: # This file is part of the LearningOnline Network with CAPA (LON-CAPA).
9: #
10: # LON-CAPA is free software; you can redistribute it and/or modify
11: # it under the terms of the GNU General Public License as published by
12: # the Free Software Foundation; either version 2 of the License, or
13: # (at your option) any later version.
14: #
15: # LON-CAPA is distributed in the hope that it will be useful,
16: # but WITHOUT ANY WARRANTY; without even the implied warranty of
17: # MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
18: # GNU General Public License for more details.
19: #
20: # You should have received a copy of the GNU General Public License
21: # along with LON-CAPA; if not, write to the Free Software
22: # Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA 02111-1307 USA
23: #
24: # /home/httpd/html/adm/gpl.txt
25: #
26: # http://www.lon-capa.org/
27: #
28: # 2/19 Guy
29: # 6/26/2001 fixed extra web display at end of <web></web> tags
30: # 8/17,8/18,8/20 Gerd Kortemeyer
31:
32:
33: package Apache::structuretags;
34:
35: use strict;
36: use Apache::lonnet;
37: use Apache::File();
38: use Apache::lonmenu;
39:
40: BEGIN {
41: &Apache::lonxml::register('Apache::structuretags',('block','languageblock','instructorcomment','while','randomlist','problem','library','web','tex','part','preduedate','postanswerdate','solved','notsolved','startouttext','endouttext'));
42: }
43:
44: sub start_web {
45: my ($target,$token,$tagstack,$parstack,$parser,$safeeval)=@_;
46: 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,undef,undef,undef,$publicuser)=
108: &Apache::lonxml::whichuser();
109: if ($symb eq '' && !$publicuser) {
110: my $help = &Apache::loncommon::help_open_topic("Ambiguous_Reference");
111: $help="Browsing resource, all submissions are temporary.<br />";
112: $body_tag_start.=$help;
113: }
114: }
115: }
116: my $form_tag_start;
117: if (!defined($found{'form'})) {
118: $form_tag_start='<form name="lonhomework" method="POST" action="'.
119: $ENV{'request.uri'}.'">';
120: }
121: return ($result,$head_tag_start,$body_tag_start,$form_tag_start);
122: }
123:
124: #use Time::HiRes();
125: sub get_resource_name {
126: my ($parstack,$safeeval)=@_;
127: my $name=&Apache::lonnet::gettitle();
128: if ($name eq '') {
129: $name=&Apache::lonnet::EXT('resource.title');
130: if ($name eq 'con_lost') { $name = ''; }
131: }
132: $Apache::lonhomework::name=$name;
133: return $name;
134: }
135:
136: sub setup_rndseed {
137: my ($safeeval)=@_;
138: my $rndseed;
139: my ($symb)=&Apache::lonxml::whichuser();
140: if ($ENV{'request.state'} eq "construct" || $symb eq '') {
141: $rndseed=$ENV{'form.rndseed'};
142: if (!$rndseed) {
143: $rndseed=$Apache::lonhomework::history{'rndseed'};
144: if (!$rndseed) {
145: $rndseed=time;
146: $ENV{'form.rndseed'}=$rndseed;
147: }
148: }
149: if ($ENV{'form.resetdata'} eq 'New Problem Variation' ||
150: $ENV{'form.newrandomization'} eq 'New Randomization') {
151: $rndseed=time;
152: if ($rndseed eq $ENV{'form.rndseed'}) {
153: srand($rndseed);
154: $rndseed=int(rand(1000000000));
155: }
156: $ENV{'form.rndseed'}=$rndseed;
157: }
158: &Apache::lonxml::debug("Setting rndseed to $rndseed");
159: &Apache::run::run('$external::randomseed='.$rndseed.';',$safeeval);
160: }
161: return $rndseed;
162: }
163:
164: sub problem_edit_header {
165: return '<input type="hidden" name="submitted" value="edit" />
166: <input type="hidden" name="problemmode" value="Edit" />
167: <input type="submit" name="problemmode" value="Discard Edits and View" />
168: <input type="submit" name="problemmode" value="EditXML" />
169: <input type="submit" name="Undo" value="undo" /> <hr />
170: <input type="submit" name="submit" value="Submit Changes and Edit" />
171: <input type="submit" name="submit" value="Submit Changes and View" /><br /><p> </p><table border="0"><tr><td bgcolor="#DDDDDD">
172: ';
173: }
174:
175: sub problem_edit_footer {
176: return '</td></tr></table><br /><input type="submit" name="submit" value="Submit Changes and Edit" />
177: <input type="submit" name="submit" value="Submit Changes and View" />';
178: }
179:
180: sub problem_web_to_edit_header {
181: my ($rndseed)=@_;
182: my $result.='<input type="hidden" name="problemmode" value="View" />
183: <input type="submit" name="problemmode" value="Edit" />
184: <input type="submit" name="problemmode" value="EditXML" />
185: <input type="submit" name="newrandomization" value="New Randomization" />
186: <input type="submit" name="resetdata" value="Reset Submissions" />
187: <nobr><input type="submit" name="changerandseed" value="Change Random Seed To:" />
188: <input type="text" name="rndseed" width="10" value="'.
189: $rndseed.'"
190: onChange="javascript:document.lonhomework.changerandseed.click()" /></nobr>
191: <input type="checkbox" name="showallfoils" ';
192: if (defined($ENV{'form.showallfoils'})) { $result.='checked="on"'; }
193: $result.= ' /> Show All Foils
194: <hr />';
195: my $numtoanalyze=$ENV{'form.numtoanalyze'};
196: if (!$numtoanalyze) { $numtoanalyze=100; }
197: $result.= '<input type="submit" name="problemmode" value="Answer Distribution" />
198: <input type="text" name="numtoanalyze" value="'.
199: $numtoanalyze.'" size="5" /> <hr />';
200: return $result;
201: }
202:
203: sub initialize_storage {
204: %Apache::lonhomework::results=();
205: %Apache::lonhomework::history=();
206: my ($symb,$courseid,$domain,$name) = &Apache::lonxml::whichuser();
207: if ($ENV{'request.state'} eq 'construct' || $symb eq '') {
208: %Apache::lonhomework::history=
209: &Apache::lonnet::tmprestore($ENV{'request.uri'},'',$domain,$name);
210: my ($temp)=keys %Apache::lonhomework::history ;
211: &Apache::lonxml::debug("Return message of $temp");
212: } else {
213: %Apache::lonhomework::history=
214: &Apache::lonnet::restore($symb,$courseid,$domain,$name);
215: }
216: #ignore error conditions
217: my ($temp)=keys %Apache::lonhomework::history ;
218: if ($temp =~ m/^error:.*/) { %Apache::lonhomework::history=(); }
219: }
220:
221: # -------------------------------------------------------------finalize_storage
222: # Stores away the result has to a student's environment
223: # checks form.grade_ for specific values, other wises stores
224: # to the running users environment
225: sub finalize_storage {
226: my $result;
227: my ($temp) = keys %Apache::lonhomework::results;
228: if ( $temp ne '' ) {
229: my ($symb,$courseid,$domain,$name) = &Apache::lonxml::whichuser();
230: if ($ENV{'request.state'} eq 'construct' || $symb eq '') {
231: $Apache::lonhomework::results{'rndseed'}=$ENV{'form.rndseed'};
232: $result=&Apache::lonnet::tmpstore(\%Apache::lonhomework::results,
233: $ENV{'request.uri'},'',$domain,$name);
234: &Apache::lonxml::debug('Construct Store return message:'.$result);
235: } else {
236: $result=&Apache::lonnet::cstore(\%Apache::lonhomework::results,
237: $symb,$courseid,$domain,$name);
238: &Apache::lonxml::debug('Store return message:'.$result);
239: }
240: }
241: return $result;
242: }
243:
244: sub checkout_msg {
245: return (<<ENDCHECKOUT);
246: <h2>The resource needs to be checked out</h2>
247: As a resource gets checked out, a unique timestamped ID is given to it, and a
248: permanent record is left in the system.<p />
249: <font color=red>
250: Checking out resources is subject to course policies, and may exclude future
251: credit even if done erroneously.<p />
252: </font>
253: <form name="checkout" method="POST" action="$ENV{'request.uri'}">
254: <input type="hidden" name="doescheckout" value="yes" />
255: <input type="button" name="checkoutbutton" value="Check out Exam for Viewing" onClick="javascript:if (confirm('Check out Exam?')) { document.checkout.submit(); }" />
256: </form>
257: ENDCHECKOUT
258: }
259:
260: sub start_problem {
261: my ($target,$token,$tagstack,$parstack,$parser,$safeeval)=@_;
262:
263: $Apache::lonhomework::parsing_a_problem=1;
264: # meta is called from lonpublisher, which doesn't uses the normal
265: # lonhomework method of parsing the file which means that inputtags
266: # won't get reset
267: if ( $Apache::inputtags::part ne '' && $target != 'meta' ) {
268: &Apache::lonxml::error('Only one problem allowed in a .problem file');
269: my $bodytext=&Apache::lonxml::get_all_text("/problem",$parser);
270: return '';
271: }
272: #initialize globals
273: $Apache::inputtags::part='0';
274: @Apache::inputtags::responselist = ();
275: @Apache::inputtags::previous=();
276: @Apache::inputtags::previous_version=();
277: $Apache::structuretags::printanswer='No';
278: @Apache::structuretags::whileconds=();
279: @Apache::structuretags::whilebody=();
280: @Apache::structuretags::whileline=();
281: $Apache::lonhomework::scantronmode=0;
282: $Apache::lonhomework::problemstatus=
283: &Apache::lonnet::EXT('resource.0.problemstatus');
284:
285: if (defined($ENV{'scantron.maxquest'})) {
286: $Apache::lonhomework::scantronmode=1;
287: }
288:
289: if ($target ne 'analyze') {
290: &initialize_storage();
291: if ($target eq 'web') {
292: &Apache::lonhomework::showhash(%Apache::lonhomework::history);
293: }
294: $Apache::lonhomework::type=&Apache::lonnet::EXT('resource.0.type');
295: &Apache::lonxml::debug("Found this to be of type :$Apache::lonhomework::type:");
296: }
297: if ($Apache::lonhomework::type eq '' ) {
298: my $uri=$ENV{'request.uri'};
299: if ($uri=~/\.(\w+)$/) {
300: $Apache::lonhomework::type=$1;
301: &Apache::lonxml::debug("Using type of $1");
302: } else {
303: $Apache::lonhomework::type='problem';
304: &Apache::lonxml::debug("Using default type, problem, :$uri:");
305: }
306: }
307:
308: #added vars to the scripting enviroment
309: my $expression='$external::part='.$Apache::inputtags::part.';';
310: &Apache::run::run($expression,$safeeval);
311: my $status;
312: my $accessmsg;
313:
314: #should get back a <html> or the neccesary stuff to start XML/MathML
315: my ($result,$head_tag_start,$body_tag_start,$form_tag_start)=
316: &page_start($target,$token,$tagstack,$parstack,$parser,$safeeval);
317: if ($target eq 'tex' and $ENV{'request.symb'} =~ m/\.page_/) {$result='';}
318:
319: if ($target eq 'analyze') { my $rndseed=&setup_rndseed($safeeval); }
320: if ($target eq 'web' || $target eq 'grade' || $target eq 'answer' ||
321: $target eq 'tex') {
322: #handle exam checkout
323: if ($Apache::lonhomework::type eq 'exam') {
324: my $token=
325: $Apache::lonhomework::history{"resource.0.outtoken"};
326: if (($ENV{'form.doescheckout'}) && (!$token)) {
327: $token=&Apache::lonxml::maketoken();
328: $Apache::lonhomework::history{"resource.0.outtoken"}=
329: $token;
330: }
331: $body_tag_start.=&Apache::lonxml::printtokenheader($target,$token);
332: }
333:
334: #handle rand seed in construction space
335: my $rndseed=&setup_rndseed($safeeval);
336: my ($symb)=&Apache::lonxml::whichuser();
337: if ($ENV{'request.state'} ne "construct" && $symb eq '') {
338: $form_tag_start.='<input type="hidden" name="rndseed" value="'.
339: $rndseed.'" />'.
340: '<input type="submit" name="resetdata"
341: value="New Problem Variation" />'.
342: '<input type="hidden" name="username"
343: value="'.$ENV{'form.username'}.'" />';
344: }
345: ($status,$accessmsg) = &Apache::lonhomework::check_access('0');
346: push (@Apache::inputtags::status,$status);
347: my $expression='$external::datestatus="'.$status.'";';
348: $expression.='$external::gradestatus="'.$Apache::lonhomework::history{"resource.0.solved"}.'";';
349: &Apache::run::run($expression,$safeeval);
350: &Apache::lonxml::debug("Got $status");
351: if (( $status eq 'CLOSED' ) ||
352: ( $status eq 'UNCHECKEDOUT') ||
353: ( $status eq 'BANNED') ||
354: ( $status eq 'UNAVAILABLE')) {
355: my $bodytext=&Apache::lonxml::get_all_text("/problem",$parser);
356: if ( $target eq "web" ) {
357: $result.= $head_tag_start.'</head>';
358: my $msg=$body_tag_start;
359: if ($status eq 'UNAVAILABLE') {
360: $result.='<h1>Unable to determine if this resource is open due to network problems. Please try again later.</h1>';
361: } else {
362: $result.='<h1>Not open to be viewed</h1>';
363: }
364: if ($status eq 'CLOSED') {
365: $msg.='The problem '.$accessmsg;
366: } elsif ($status eq 'UNCHECKEDOUT') {
367: $msg.=&checkout_msg;
368: }
369: $result.=$msg.'<br />';
370: } elsif ($target eq 'tex') {
371: $result.='\begin{document}\noindent \vskip 1 mm \begin{minipage}{\textwidth}\vskip 0 mm';
372: if ($status eq 'UNAVAILABLE') {
373: $result.='Unable to determine if this resource is open due to network problems. Please try again later.\vskip 0 mm ';
374: } else {
375: $result.="Problem is not open to be viewed. It $accessmsg \\vskip 0 mm ";
376: }
377: }
378: } elsif ($target eq 'web') {
379: my $name= &get_resource_name($parstack,$safeeval);
380: if ($status eq 'CAN_ANSWER') {
381: # create a page header and exit
382: $result.="$head_tag_start<title>$name</title></head>
383: $body_tag_start \n $form_tag_start".
384: '<input type="hidden" name="submitted" value="yes" />';
385: if ($ENV{'request.state'} eq "construct") {
386: $result.= &problem_web_to_edit_header($rndseed);
387: }
388: # if we are viewing someone else preserve that info
389: if (defined $ENV{'form.grade_symb'}) {
390: foreach my $field ('symb','courseid','domain','username') {
391: $result .= '<input type="hidden" name="grade_'.$field.
392: '" value="'.$ENV{"form.grade_$field"}.'" />'."\n";
393: }
394: }
395: } elsif ($status eq 'SHOW_ANSWER' || $status eq 'CANNOT_ANSWER'
396: || $status eq 'CLOSED' || $status eq 'UNAVALAILABLE') {
397: $result.=$head_tag_start.
398: "<title>$name</title></head>\n$body_tag_start\n";
399: }
400: } elsif ($target eq 'tex') {
401: my $name= &Apache::lonxml::get_param('name',$parstack,$safeeval);
402: if ($name eq '') {
403: $name=&Apache::lonnet::EXT('resource.title');
404: if ($name eq 'con_lost') { $name = ''; }
405: }
406: $Apache::lonhomework::name=$name;
407: my $id = $Apache::inputtags::part;
408: my $weight = &Apache::lonnet::EXT("resource.$id.weight");
409: my $allkeys=&Apache::lonnet::metadata($ENV{'request.uri'},'keys');
410: my @allkeys = split /,/,$allkeys;
411: my $allow_print_points = 0;
412: foreach my $partial_key (@allkeys) {
413: if ($partial_key=~m/weight/) {
414: $allow_print_points++;
415: }
416: }
417: my $duedate = &Apache::lonnet::EXT("resource.$id.duedate");
418: $duedate = POSIX::strftime("%c",localtime($duedate));
419: my $temp_file;
420: my $filename = "/home/httpd/prtspool/$ENV{'user.name'}_$ENV{'user.domain'}_printout.due";
421: if (-e $filename) {
422: $temp_file = Apache::File->new($filename);
423: } else {
424: $temp_file = Apache::File->new('>>'.$filename);
425: }
426: my @due_file_content = <$temp_file>;
427: my $due_file_content = $due_file_content[$#due_file_content];
428: chomp $due_file_content;
429: my $name_of_resourse= &get_resource_name($parstack,$safeeval);
430: if ($due_file_content ne $duedate) {
431: $temp_file = Apache::File->new('>'.$filename);
432: print $temp_file "$duedate\n";
433: if (not $ENV{'request.symb'} =~ m/\.page_/) {
434: if(not $duedate=~m/1969/ and $Apache::lonhomework::type ne 'exam') {
435: $result .= '\begin{document} \typeout{STAMPOFPASSEDRESOURCESTART Resource <h2>"'.$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}';
436: } else {
437: $result .= '\begin{document} \typeout{STAMPOFPASSEDRESOURCESTART Resource <h2>"'.$name_of_resourse.'"</h2> located in <br /><small><b>'.$ENV{'request.uri'}.'</b></small><br /> STAMPOFPASSEDRESOURCEEND} \noindent \vskip 1 mm \noindent\begin{minipage}{\textwidth}';
438: if ($Apache::lonhomework::type eq 'exam' and $allow_print_points==1) { $result .= '\fbox{\textit{'.$weight.' pt}}';}
439: }
440: } else {
441: $result .= '\vskip 1mm\textit{Due date: '.$duedate.'} \\\\\\\\';
442: }
443: } else {
444: if (not $ENV{'request.symb'} =~ m/\.page_/) {
445: $result .= '\begin{document} \typeout{STAMPOFPASSEDRESOURCESTART Resource <h2>"'.$name_of_resourse.'"</h2> located in <br /><small><b>'.$ENV{'request.uri'}.'</b></small><br /> STAMPOFPASSEDRESOURCEEND} \noindent \vskip 1 mm\noindent\begin{minipage}{\textwidth}';
446: if (($Apache::lonhomework::type eq 'exam') and ($allow_print_points==1)) { $result .= '\fbox{\textit{'.$weight.' pt}}';}
447: } else {
448: $result .= '\vskip 1mm \\\\\\\\';
449: }
450: }
451: }
452: } elsif ($target eq 'edit') {
453: $result.=$head_tag_start."</head>".$body_tag_start.$form_tag_start.
454: &problem_edit_header();
455: my $temp=&Apache::edit::insertlist($target,$token);
456: $result.=$temp;
457: } elsif ($target eq 'modified') {
458: $result=$token->[4];
459: $result.=&Apache::edit::handle_insert();
460: } else {
461: # page_start returned a starting result, delete it if we don't need it
462: $result = '';
463: }
464: return $result;
465: }
466:
467: sub end_problem {
468: my ($target,$token,$tagstack,$parstack,$parser,$safeeval)=@_;
469: my $result='';
470: my $status=$Apache::inputtags::status['-1'];
471: if ($target eq 'grade' || $target eq 'web' || $target eq 'answer' ||
472: $target eq 'tex') {
473: if ( $target eq 'grade' && $Apache::inputtags::part eq '0' &&
474: $status eq 'CAN_ANSWER' ) {
475: # if part is zero, no <part>s existed, so we need to the grading
476: &Apache::inputtags::grade;
477: } elsif ( ($target eq 'web' || $target eq 'tex') &&
478: $Apache::inputtags::part eq '0' &&
479: $status ne 'UNCHECKEDOUT') {
480: # if part is zero, no <part>s existed, so we need show the current
481: # grading status
482: my $gradestatus = &Apache::inputtags::gradestatus($Apache::inputtags::part,$target);
483: $result.= $gradestatus;
484: }
485: if (
486: (($target eq 'web') && ($ENV{'request.state'} ne 'construct')) ||
487: ($target eq 'answer') || ($target eq 'tex')
488: ) {
489: if ($status eq 'CAN_ANSWER') {
490: if ($target ne 'tex' &&
491: $ENV{'form.answer_output_mode'} ne 'tex') {
492: $result.="</form></body>\n";
493: }
494: } elsif ($status eq 'SHOW_ANSWER' || $status eq 'CANNOT_ANSWER' ||
495: $status eq 'UNCHECKEDOUT' ) {
496: if ($target ne 'tex') {
497: $result.="</body>\n";
498: }
499: }
500: if ($target eq 'web') {
501: $result.=&Apache::lonxml::xmlend();
502: } elsif ($target eq 'tex') {
503: $result .= '\keephidden{ENDOFPROBLEM}\vskip 0.5mm\noindent\makebox[\textwidth/$number_of_columns][b]{\hrulefill}';
504: if (not $ENV{'request.symb'} =~ m/\.page_/) {
505: $result .= '\end{minipage}\end{document} ';
506: } else {
507: $result .= '';
508: }
509: }
510: }
511: if ($target eq 'grade') {
512: &Apache::lonhomework::showhash(%Apache::lonhomework::results);
513: &finalize_storage();
514: }
515: if ($target eq 'answer' && ($ENV{'request.state'} eq 'construct')
516: && $ENV{'form.answer_output_mode'} ne 'tex') {
517: $result.='</html>'; # normally we get it from xmlend, but in CSTR
518: # we always show answer mode too.
519: }
520: } elsif ($target eq 'meta') {
521: if ($Apache::inputtags::part eq '0') {
522: $result=&Apache::response::mandatory_part_meta;
523: }
524: } elsif ($target eq 'edit') {
525: &Apache::lonxml::debug("in end_problem with $target, edit");
526: $result = &problem_edit_footer();
527: }
528:
529: undef(%Apache::lonhomework::history);
530: undef(%Apache::lonhomework::results);
531: undef($Apache::inputtags::part);
532: undef($Apache::lonhomework::parsing_a_problem);
533:
534: return $result;
535: }
536:
537:
538: sub start_library {
539: my ($target,$token,$tagstack,$parstack,$parser,$safeeval)=@_;
540: my ($result,$head_tag_start,$body_tag_start,$form_tag_start);
541:
542: if ($target eq 'edit') {
543: ($result,$head_tag_start,$body_tag_start,$form_tag_start)=
544: &page_start($target,$token,$tagstack,$parstack,$parser,$safeeval);
545: $result.=$head_tag_start."</head>".$body_tag_start.$form_tag_start.
546: &problem_edit_header();
547: my $temp=&Apache::edit::insertlist($target,$token);
548: $result.=$temp;
549: } elsif ($target eq 'modified') {
550: $result=$token->[4];
551: $result.=&Apache::edit::handle_insert();
552: } elsif ($target eq 'web' && $$tagstack[0] ne 'problem' &&
553: $ENV{'request.state'} eq "construct" ) {
554: ($result,$head_tag_start,$body_tag_start,$form_tag_start)=
555: &page_start($target,$token,$tagstack,$parstack,$parser,$safeeval);
556: my $name=&get_resource_name($parstack,$safeeval);
557: my $rndseed=&setup_rndseed($safeeval);
558: $result.="$head_tag_start<title>$name</title></head>
559: $body_tag_start \n $form_tag_start".
560: '<input type="hidden" name="submitted" value="yes" />';
561: $result.=&problem_web_to_edit_header($rndseed);
562: }
563: return $result;
564: }
565:
566: sub end_library {
567: my ($target,$token,$tagstack,$parstack,$parser,$safeeval)=@_;
568: my $result='';
569: if ($target eq 'edit') {
570: $result=&problem_edit_footer();
571: } elsif ($target eq 'web' && $$tagstack[0] ne 'problem' &&
572: $ENV{'request.state'} eq "construct") {
573: $result.='</form></body>'.&Apache::lonxml::xmlend();
574: }
575: return $result;
576: }
577:
578: sub start_block {
579: my ($target,$token,$tagstack,$parstack,$parser,$safeeval)=@_;
580:
581: my $result;
582:
583: if ($target eq 'web' || $target eq 'grade' || $target eq 'answer' ||
584: $target eq 'tex' || $target eq 'analyze') {
585: my $code = $token->[2]->{'condition'};
586: if ($code) {
587: if (!$Apache::lonxml::default_homework_loaded) {
588: &Apache::lonxml::default_homework_load($safeeval);
589: }
590: $result = &Apache::run::run($code,$safeeval);
591: &Apache::lonxml::debug("block :$code: returned :$result:");
592: } else {
593: $result='1';
594: }
595: if ( ! $result ) {
596: my $skip=&Apache::lonxml::get_all_text("/block",$parser);
597: &Apache::lonxml::debug("skipping ahead :$skip: $$parser[-1]");
598: }
599: $result='';
600: } elsif ($target eq 'edit') {
601: $result .=&Apache::edit::tag_start($target,$token);
602: $result .=&Apache::edit::text_arg('Test Condition:','condition',
603: $token,40);
604: $result .=&Apache::edit::end_row().&Apache::edit::start_spanning_row();
605: } elsif ($target eq 'modified') {
606: my $constructtag=&Apache::edit::get_new_args($token,$parstack,
607: $safeeval,'condition');
608: if ($constructtag) { $result = &Apache::edit::rebuild_tag($token); }
609: }
610: return $result;
611: }
612:
613: sub end_block {
614: my ($target,$token,$tagstack,$parstack,$parser,$safeeval)=@_;
615: my $result;
616: if ($target eq "edit") {
617: $result.= &Apache::edit::tag_end($target,$token,'');
618: }
619: return $result;
620: }
621:
622: sub start_languageblock {
623: my ($target,$token,$tagstack,$parstack,$parser,$safeeval)=@_;
624:
625: my $result;
626:
627: if ($target eq 'web' || $target eq 'grade' || $target eq 'answer' ||
628: $target eq 'tex' || $target eq 'analyze') {
629: my $include = $token->[2]->{'include'};
630: my $exclude = $token->[2]->{'exclude'};
631: my %languages=&Apache::loncommon::display_languages();
632: $result='1';
633: if ($include) {
634: $result='';
635: foreach (split(/\,/,$include)) {
636: if ($languages{$_}) { $result='1'; }
637: }
638: }
639: if ($exclude) {
640: foreach (split(/\,/,$exclude)) {
641: if ($languages{$_}) { $result='0'; }
642: }
643: }
644: if ( ! $result ) {
645: my $skip=&Apache::lonxml::get_all_text("/languageblock",$parser);
646: &Apache::lonxml::debug("skipping ahead :$skip: $$parser[-1]");
647: }
648: $result='';
649: } elsif ($target eq 'edit') {
650: $result .=&Apache::edit::tag_start($target,$token);
651: $result .=&Apache::edit::text_arg('Include Language:','include',
652: $token,40);
653: $result .=&Apache::edit::text_arg('Exclude Language:','exclude',
654: $token,40);
655: $result .=&Apache::edit::end_row().&Apache::edit::start_spanning_row();
656: } elsif ($target eq 'modified') {
657: my $constructtag=&Apache::edit::get_new_args($token,$parstack,
658: $safeeval,'include',
659: 'exclude');
660: if ($constructtag) { $result = &Apache::edit::rebuild_tag($token); }
661: }
662: return $result;
663: }
664:
665: sub end_languageblock {
666: my ($target,$token,$tagstack,$parstack,$parser,$safeeval)=@_;
667: my $result;
668: if ($target eq "edit") {
669: $result.= &Apache::edit::tag_end($target,$token,'');
670: }
671: return $result;
672: }
673:
674: sub start_instructorcomment {
675: my ($target,$token,$tagstack,$parstack,$parser,$safeeval)=@_;
676:
677: my $result;
678:
679: if ($target eq 'web' || $target eq 'grade' || $target eq 'answer' ||
680: $target eq 'tex' || $target eq 'analyze') {
681: $result=($ENV{'request.role'}=~/^(in|cc|au|ca|li)/);
682: if ( ! $result ) {
683: my $skip=&Apache::lonxml::get_all_text("/instructorcomment",$parser);
684: &Apache::lonxml::debug("skipping ahead :$skip: $$parser[-1]");
685: }
686: $result='';
687: } elsif ($target eq 'edit') {
688: $result .=&Apache::edit::tag_start($target,$token);
689: $result .=&Apache::edit::end_row().&Apache::edit::start_spanning_row();
690: }
691: return $result;
692: }
693:
694: sub end_instructorcomment {
695: my ($target,$token,$tagstack,$parstack,$parser,$safeeval)=@_;
696: my $result;
697: if ($target eq "edit") {
698: $result.= &Apache::edit::tag_end($target,$token,'');
699: }
700: return $result;
701: }
702:
703: sub start_while {
704: my ($target,$token,$tagstack,$parstack,$parser,$safeeval)=@_;
705:
706: my $result;
707: if ($target eq 'web' || $target eq 'grade' || $target eq 'answer' ||
708: $target eq 'tex' || $target eq 'analyze') {
709: my $code = $token->[2]->{'condition'};
710:
711: push( @Apache::structuretags::whileconds, $code);
712: if (!$Apache::lonxml::default_homework_loaded) {
713: &Apache::lonxml::default_homework_load($safeeval);
714: }
715: my $result = &Apache::run::run($code,$safeeval);
716: my $bodytext=&Apache::lonxml::get_all_text("/while",$parser);
717: push( @Apache::structuretags::whilebody, $bodytext);
718: push( @Apache::structuretags::whileline, $token->[5]);
719: &Apache::lonxml::debug("s code $code got -$result-");
720: if ( $result ) {
721: &Apache::lonxml::newparser($parser,\$bodytext);
722: }
723: } elsif ($target eq 'edit') {
724: $result .=&Apache::edit::tag_start($target,$token);
725: $result .=&Apache::edit::text_arg('Test Condition:','condition',
726: $token,40);
727: $result .=&Apache::edit::end_row().&Apache::edit::start_spanning_row();
728: } elsif ($target eq 'modified') {
729: my $constructtag=&Apache::edit::get_new_args($token,$parstack,
730: $safeeval,'condition');
731: if ($constructtag) { $result = &Apache::edit::rebuild_tag($token); }
732: }
733: return $result;
734: }
735:
736: sub end_while {
737: my ($target,$token,$tagstack,$parstack,$parser,$safeeval)=@_;
738: my $result;
739:
740: if ($target eq 'web' || $target eq 'grade' || $target eq 'answer' ||
741: $target eq 'tex' || $target eq 'analyze') {
742: my $code = pop(@Apache::structuretags::whileconds);
743: my $bodytext = pop(@Apache::structuretags::whilebody);
744: my $line = pop(@Apache::structuretags::whileline);
745: my $return = &Apache::run::run($code,$safeeval);
746: my $starttime=time;
747: my $error=0;
748: while ($return) {
749: if (time-$starttime >
750: $Apache::lonnet::perlvar{'lonScriptTimeout'}) {
751: $return = 0; $error=1; next;
752: }
753: $result.=&Apache::scripttag::xmlparse($bodytext);
754: $return = &Apache::run::run($code,$safeeval);
755: }
756: if ($error) {
757: &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>');
758: }
759: } elsif ($target eq "edit") {
760: $result.= &Apache::edit::tag_end($target,$token,'');
761: }
762: return $result;
763: }
764:
765: # <randomlist show="1">
766: # <tag1>..</tag1>
767: # <tag2>..</tag2>
768: # <tag3>..</tag3>
769: # ...
770: # </randomlist>
771: sub start_randomlist {
772: my ($target,$token,$tagstack,$parstack,$parser,$safeeval)=@_;
773: my $result;
774: if ($target eq 'answer' || $target eq 'grade' || $target eq 'web' ||
775: $target eq 'tex' || $target eq 'analyze') {
776: my $body= &Apache::lonxml::get_all_text("/randomlist",$parser);
777: my $b_parser= HTML::TokeParser->new(\$body);
778: my $b_tok;
779: my @randomlist;
780: my $list_item;
781: while($b_tok = $b_parser->get_token() ) {
782: if($b_tok->[0] eq 'S') { # start tag
783: # get content of the tag until matching end tag
784: # get all text upto the matching tag
785: # and push the content into @randomlist
786: $list_item = &Apache::lonxml::get_all_text('/'.$b_tok->[1],
787: $b_parser);
788: $list_item = "$b_tok->[4]"."$list_item"."</$b_tok->[1]>";
789: push(@randomlist,$list_item);
790: # print "<br /><b>START-TAG $b_tok->[1], $b_tok->[4],
791: # $list_item</b>";
792: }
793: if($b_tok->[0] eq 'T') { # text
794: # what to do with text in between tags?
795: # print "<b>TEXT $b_tok->[1]</b><br />";
796: }
797: # if($b_tok->[0] eq 'E') { # end tag, should not happen
798: # print "<b>END-TAG $b_tok->[1]</b><br />";
799: # }
800: }
801: my @idx_arr = (0 .. $#randomlist);
802: &Apache::structuretags::shuffle(\@idx_arr);
803: my $bodytext = '';
804: my $show=$#randomlist;
805: my $showarg=&Apache::lonxml::get_param('show',$parstack,$safeeval);
806: $showarg--;
807: if ( ($showarg >= 0) && ($showarg < $show) ) { $show = $showarg; }
808: for(0 .. $show) {
809: $bodytext .= "$randomlist[ $idx_arr[$_] ]";
810: }
811: &Apache::lonxml::newparser($parser,\$bodytext);
812: } elsif ($target eq 'edit' ) {
813: $result .=&Apache::edit::tag_start($target,$token);
814: $result .=&Apache::edit::text_arg('Maximum Tags to Show:','show',
815: $token,5);
816: $result .=&Apache::edit::end_row().&Apache::edit::start_spanning_row();
817: } elsif ($target eq 'modified' ) {
818: my $constructtag=&Apache::edit::get_new_args($token,$parstack,
819: $safeeval,'show');
820: if ($constructtag) { $result = &Apache::edit::rebuild_tag($token); }
821: }
822: return $result;
823: }
824:
825: sub shuffle {
826: my $a=shift;
827: my $i;
828: if (defined(@$a)) {
829: &Apache::response::setrandomnumber();
830: for($i=@$a;--$i;) {
831: my $j=int(&Math::Random::random_uniform() * ($i+1));
832: next if $i == $j;
833: @$a[$i,$j] = @$a[$j,$i];
834: }
835: }
836: }
837:
838: sub end_randomlist {
839: my ($target,$token,$tagstack,$parstack,$parser,$safeeval)=@_;
840: my $result;
841: if ($target eq 'edit' ) {
842: $result=&Apache::edit::tag_end($target,$token,
843: 'End Randomly Parsed Block');
844: }
845: return $result;
846: }
847:
848: sub start_part {
849: my ($target,$token,$tagstack,$parstack,$parser,$safeeval)=@_;
850: my $result='';
851: my $id= &Apache::lonxml::get_param('id',$parstack,$safeeval);
852: if ($id eq '') { $id = $Apache::lonxml::curdepth; }
853: $Apache::inputtags::part=$id;
854: @Apache::inputtags::responselist = ();
855: @Apache::inputtags::previous=();
856: @Apache::inputtags::previous_version=();
857: $Apache::lonhomework::problemstatus=
858: &Apache::lonnet::EXT("resource.$id.problemstatus");
859: my $hidden=&Apache::loncommon::check_if_partid_hidden($Apache::inputtags::part);
860:
861: if ($target eq 'meta') {
862: return &Apache::response::mandatory_part_meta;
863: } elsif ($target eq 'web' || $target eq 'grade' ||
864: $target eq 'answer' || $target eq 'tex') {
865: if ($hidden) {
866: my $bodytext=&Apache::lonxml::get_all_text("/part",$parser);
867: } else {
868: my ($status,$accessmsg) = &Apache::lonhomework::check_access($id);
869: push (@Apache::inputtags::status,$status);
870: my $expression='$external::datestatus="'.$status.'";';
871: $expression.='$external::gradestatus="'.$Apache::lonhomework::history{"resource.$id.solved"}.'";';
872: &Apache::run::run($expression,$safeeval);
873: if ( $status eq 'CLOSED' ) {
874: my $bodytext=&Apache::lonxml::get_all_text("/part",$parser);
875: if ( $target eq "web" ) {
876: $result="<br />Part is not open to be viewed. It $accessmsg<br />";
877: } elsif ( $target eq 'tex' ) {
878: $result="\\end{minipage}\\vskip 0 mm Part is not open to be viewed. It $accessmsg \\\\\\begin{minipage}{\\textwidth}";
879: }
880: } else {
881: if ($target eq 'tex') {
882: $result.='\noindent \end{minipage}\vskip 0 mm \noindent \begin{minipage}{\textwidth}\noindent';
883: my $weight = &Apache::lonnet::EXT("resource.$id.weight");
884: if ($Apache::lonhomework::type eq 'exam') { $result .= '\fbox{\textit{'.$weight.' pt}}';}
885: }
886: }
887: }
888: } elsif ($target eq 'edit') {
889: $result.=&Apache::edit::tag_start($target,$token);
890: $result.=&Apache::edit::text_arg('Part ID:','id',$token).
891: &Apache::loncommon::help_open_topic("Part_Tag_Edit_Help").
892: &Apache::edit::end_row().&Apache::edit::start_spanning_row();
893: } elsif ($target eq 'modified') {
894: my $constructtag=&Apache::edit::get_new_args($token,$parstack,
895: $safeeval,'id');
896: if ($constructtag) {
897: $result = &Apache::edit::rebuild_tag($token);
898: $result.=&Apache::edit::handle_insert();
899: }
900: }
901: return $result;
902: }
903:
904: sub end_part {
905: my ($target,$token,$tagstack,$parstack,$parser,$safeeval)=@_;
906: &Apache::lonxml::debug("in end_part $target ");
907: my $status=$Apache::inputtags::status['-1'];
908: my $hidden=&Apache::loncommon::check_if_partid_hidden($Apache::inputtags::part);
909: my $result='';
910: if ( $target eq 'meta' ) {
911: $result='';
912: } elsif ( $target eq 'grade' && $status eq 'CAN_ANSWER' && !$hidden) {
913: $result=&Apache::inputtags::grade;
914: } elsif (($target eq 'web' || $target eq 'tex') && !$hidden ) {
915: my $gradestatus=&Apache::inputtags::gradestatus($Apache::inputtags::part,
916: $target);
917: if ($Apache::lonhomework::type eq 'exam') {$gradestatus='';}
918: $result=$gradestatus;
919: }
920: pop @Apache::inputtags::status;
921: $Apache::inputtags::part='';
922: return $result;
923: }
924:
925: sub start_preduedate {
926: my ($target,$token,$tagstack,$parstack,$parser,$safeeval)=@_;
927: if ($target eq 'web' || $target eq 'grade' || $target eq 'answer' || $target eq 'tex') {
928: if ($Apache::inputtags::status['-1'] ne 'CAN_ANSWER' &&
929: $Apache::inputtags::status['-1'] ne 'CANNOT_ANSWER' &&
930: $Apache::inputtags::status['-1'] ne 'SHOW_ANSWER') {
931: &Apache::lonxml::get_all_text("/preduedate",$parser);
932: }
933: }
934: return '';
935: }
936:
937: sub end_preduedate {
938: return '';
939: }
940:
941: sub start_postanswerdate {
942: my ($target,$token,$tagstack,$parstack,$parser,$safeeval)=@_;
943: if ($target eq 'web' || $target eq 'grade' || $target eq 'tex') {
944: if ($Apache::inputtags::status['-1'] ne 'SHOW_ANSWER') {
945: &Apache::lonxml::get_all_text("/postanswerdate",$parser);
946: }
947: } elsif ($target eq 'tex') {
948: return '\vskip 0 mm \noindent';
949: }
950: return '';
951: }
952:
953: sub end_postanswerdate {
954: return '';
955: }
956:
957: sub start_notsolved {
958: my ($target,$token,$tagstack,$parstack,$parser,$safeeval)=@_;
959: if ($target eq 'web' || $target eq 'grade' || $target eq 'answer' ||
960: $target eq 'tex') {
961: my $gradestatus=$Apache::lonhomework::history{"resource.$Apache::inputtags::part.solved"};
962: &Apache::lonxml::debug("not solved has :$gradestatus:");
963: if ($gradestatus =~ /^correct/) {
964: &Apache::lonxml::debug("skipping");
965: &Apache::lonxml::get_all_text("/notsolved",$parser);
966: }
967: }
968: return '';
969: }
970:
971: sub end_notsolved {
972: return '';
973: }
974:
975: sub start_solved {
976: my ($target,$token,$tagstack,$parstack,$parser,$safeeval)=@_;
977: if ($target eq 'web' || $target eq 'grade' || $target eq 'answer' ||
978: $target eq 'tex') {
979: my $gradestatus=$Apache::lonhomework::history{"resource.$Apache::inputtags::part.solved"};
980: if ($gradestatus !~ /^correct/) {
981: &Apache::lonxml::get_all_text("/solved",$parser);
982: }
983: }
984: return '';
985: }
986:
987: sub end_solved {
988: return '';
989: }
990:
991: sub start_startouttext {
992: my ($target,$token,$tagstack,$parstack,$parser,$safeeval)=@_;
993: my @result=(''.'');
994: if ($target eq 'edit' || $target eq 'modified' ) { @result=('','no'); }
995: return (@result);
996: }
997:
998: sub end_startouttext {
999: my ($target,$token,$tagstack,$parstack,$parser,$safeeval)=@_;
1000: my $result='';
1001: my $text='';
1002:
1003: if ($target eq 'edit') {
1004: $text=&Apache::lonxml::get_all_text("endouttext",$parser);
1005: $result.=&Apache::edit::start_table($token)."<tr><td>Text Block</td>
1006: <td>Delete:".
1007: &Apache::edit::deletelist($target,$token)
1008: ."</td>
1009: <td>".
1010: &Apache::edit::insertlist($target,$token).
1011: &Apache::edit::end_row().
1012: &Apache::edit::start_spanning_row()."\n"
1013: .'<table><tr><td>'.
1014: &Apache::loncommon::help_open_topic("Greek_Symbols",
1015: 'Greek Symbols',
1016: undef,undef,600)
1017: .'</td><td>'.
1018: &Apache::loncommon::help_open_topic("Other_Symbols",
1019: 'Other Symbols',
1020: undef,undef,600)
1021: .'</td></tr></table>'.
1022: &Apache::edit::editfield($token->[1],$text,"",80,4);
1023: }
1024: if ($target eq 'modified') {
1025: $text=&Apache::lonxml::get_all_text("endouttext",$parser);
1026: $result='<startouttext />'.&Apache::edit::modifiedfield();
1027: }
1028: if ($target eq 'tex') {
1029: $result .= '\noindent ';
1030: }
1031: return $result;
1032: }
1033:
1034: sub start_endouttext {
1035: my ($target,$token,$tagstack,$parstack,$parser,$safeeval)=@_;
1036: my $result='';
1037: if ($target eq "edit" ) { $result="</td></tr>".&Apache::edit::end_table()."\n"; }
1038: if ($target eq "modified") {
1039: $result='<endouttext />'.
1040: &Apache::edit::handle_insertafter('startouttext'); }
1041: return $result;
1042: }
1043:
1044: sub end_endouttext {
1045: my ($target,$token,$tagstack,$parstack,$parser,$safeeval)=@_;
1046: my @result=('','');
1047: if ($target eq "edit" || $target eq 'modified') { @result=('','no'); }
1048: return (@result);
1049: }
1050:
1051: sub delete_startouttext {
1052: my ($target,$token,$tagstack,$parstack,$parser,$safeeval)=@_;
1053: # my $text=&Apache::lonxml::get_all_text("endouttext",$parser);
1054: my $text=$$parser['-1']->get_text("/endouttext");
1055: my $ntoken=$$parser['-1']->get_token();
1056: &Apache::lonxml::debug("Deleting :$text: and :$ntoken->[0]:$ntoken->[1]:$ntoken->[2]: for startouttext");
1057: &Apache::lonxml::end_tag($tagstack,$parstack,$ntoken);
1058: # Deleting 2 parallel tag pairs, but we need the numbers later to look like
1059: # they did the last time round
1060: &Apache::lonxml::increasedepth($ntoken);
1061: &Apache::lonxml::decreasedepth($ntoken);
1062: return 1;
1063: }
1064:
1065: 1;
1066: __END__
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