1: # The LearningOnline Network with CAPA
2: # definition of tags that give a structure to a document
3: #
4: # $Id: structuretags.pm,v 1.200.2.2 2003/10/03 15:27:56 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: 'simpleeditbutton','definetag'));
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 $result='';
61: my $bodytext=&Apache::lonxml::get_all_text("/tex",$parser);
62: if ($target eq 'tex') {
63: return $bodytext.' ';
64: }
65: return $result;;
66: }
67:
68: sub end_tex {
69: return '';
70: }
71:
72: sub page_start {
73: my ($target,$token,$tagstack,$parstack,$parser,$safeeval)=@_;
74: my %found;
75: foreach my $taginside (@$tagstack) {
76: foreach my $taglookedfor ('html','body','form') {
77: if ($taginside =~ /^$taglookedfor$/i) {$found{$taglookedfor} = 1;}
78: }
79: }
80:
81: my $result;
82: my $head_tag_start;
83: if (!defined($found{'html'})) {
84: $result=&Apache::londefdef::start_html($target,$token,$tagstack,
85: $parstack,$parser,$safeeval);
86: $head_tag_start='<head>'.&Apache::lonmenu::registerurl(undef,$target);
87: }
88: my $body_tag_start;
89: if (!defined($found{'body'})) {
90: $body_tag_start='<body onLoad="'.&Apache::lonmenu::loadevents().'" '.
91: 'onUnload="'.&Apache::lonmenu::unloadevents().'" ';
92: my $background=&Apache::lonxml::get_param('background',$parstack,
93: $safeeval);
94: if ($ENV{'browser.imagesuppress'} eq 'on') { $background=''; }
95: if ($background) {
96: $Apache::lonxml::extlinks[$#Apache::lonxml::extlinks+1]=
97: $background;
98: $body_tag_start.='background="'.$background.'" ';
99: } else {
100: my $bgcolor=&Apache::lonxml::get_param('bgcolor',$parstack,
101: $safeeval);
102: if (($bgcolor) && ($ENV{'browser.blackwhite'} ne 'on')) {
103: $body_tag_start.='bgcolor="'.$bgcolor.'" ';
104: } else {
105: $body_tag_start.='bgcolor="#ffffff"';
106: }
107: }
108: if ($ENV{'browser.fontenhance'} eq 'on') {
109: $body_tag_start.=' style="font-size: x-large;" ';
110: }
111: $body_tag_start.='>'.&Apache::lonmenu::menubuttons(undef,$target,1);
112: if ($target eq 'web' && $ENV{'request.state'} ne 'construct') {
113: my ($symb,undef,undef,undef,$publicuser)=
114: &Apache::lonxml::whichuser();
115: if ($symb eq '' && !$publicuser) {
116: my $help = &Apache::loncommon::help_open_topic("Ambiguous_Reference");
117: $help="Browsing resource, all submissions are temporary.<br />";
118: $body_tag_start.=$help;
119: }
120: }
121: }
122: my $form_tag_start;
123: if (!defined($found{'form'})) {
124: $form_tag_start='<form name="lonhomework" method="POST" action="'.
125: $ENV{'request.uri'}.'">';
126: }
127: return ($result,$head_tag_start,$body_tag_start,$form_tag_start);
128: }
129:
130: #use Time::HiRes();
131: sub get_resource_name {
132: my ($parstack,$safeeval)=@_;
133: my $name=&Apache::lonnet::gettitle();
134: if ($name eq '') {
135: $name=&Apache::lonnet::EXT('resource.title');
136: if ($name eq 'con_lost') { $name = ''; }
137: }
138: $Apache::lonhomework::name=$name;
139: return $name;
140: }
141:
142: sub setup_rndseed {
143: my ($safeeval)=@_;
144: my $rndseed;
145: my ($symb)=&Apache::lonxml::whichuser();
146: if ($ENV{'request.state'} eq "construct" || $symb eq '') {
147: $rndseed=$ENV{'form.rndseed'};
148: if (!$rndseed) {
149: $rndseed=$Apache::lonhomework::history{'rndseed'};
150: if (!$rndseed) {
151: $rndseed=time;
152: $ENV{'form.rndseed'}=$rndseed;
153: }
154: }
155: if ($ENV{'form.resetdata'} eq 'New Problem Variation' ||
156: $ENV{'form.newrandomization'} eq 'New Randomization') {
157: srand(time);
158: $rndseed=int(rand(2100000000));
159: $ENV{'form.rndseed'}=$rndseed;
160: delete($ENV{'form.resetdata'});
161: delete($ENV{'form.newrandomization'});
162: }
163: if (defined($rndseed) && $rndseed ne int($rndseed)) {
164: $rndseed=join(',',&Math::Random::random_seed_from_phrase($rndseed));
165: }
166: &Apache::lonxml::debug("Setting rndseed to $rndseed");
167: &Apache::run::run('$external::randomseed='.$rndseed.';',$safeeval);
168: }
169: return $rndseed;
170: }
171:
172: sub problem_edit_header {
173: return '<input type="hidden" name="submitted" value="edit" />
174: <input type="hidden" name="problemmode" value="Edit" />
175: <input type="submit" name="problemmode" value="Discard Edits and View" />
176: <input type="submit" name="problemmode" value="EditXML" />
177: <input type="submit" name="Undo" value="undo" /> <hr />
178: <input type="submit" name="submit" value="Submit Changes and Edit" />
179: <input type="submit" name="submit" value="Submit Changes and View" /><br /><p> </p><table border="0"><tr><td bgcolor="#DDDDDD">
180: ';
181: }
182:
183: sub problem_edit_footer {
184: return '</td></tr></table><br /><input type="submit" name="submit" value="Submit Changes and Edit" />
185: <input type="submit" name="submit" value="Submit Changes and View" />';
186: }
187:
188: sub problem_web_to_edit_header {
189: my ($rndseed)=@_;
190: my $result.='<input type="hidden" name="problemmode" value="View" />
191: <input type="submit" name="problemmode" value="Edit" />
192: <input type="submit" name="problemmode" value="EditXML" />
193: <input type="submit" name="newrandomization" value="New Randomization" />
194: <input type="submit" name="resetdata" value="Reset Submissions" />
195: <nobr><input type="submit" name="changerandseed" value="Change Random Seed To:" />
196: <input type="text" name="rndseed" width="10" value="'.
197: $rndseed.'"
198: onChange="javascript:document.lonhomework.changerandseed.click()" /></nobr>
199: <input type="checkbox" name="showallfoils" ';
200: if (defined($ENV{'form.showallfoils'})) { $result.='checked="on"'; }
201: $result.= ' /> Show All Foils
202: <hr />';
203: my $numtoanalyze=$ENV{'form.numtoanalyze'};
204: if (!$numtoanalyze) { $numtoanalyze=20; }
205: $result.= '<input type="submit" name="problemmode" value="Calculate answers" /> for
206: <input type="text" name="numtoanalyze" value="'.
207: $numtoanalyze.'" size="5" /> versions of this problem.'.
208: &Apache::loncommon::help_open_topic("Analyze_Problem",
209: '',undef,undef,300).
210: '<hr />';
211: return $result;
212: }
213:
214: sub initialize_storage {
215: %Apache::lonhomework::results=();
216: %Apache::lonhomework::history=();
217: my ($symb,$courseid,$domain,$name) = &Apache::lonxml::whichuser();
218: if ($ENV{'request.state'} eq 'construct' || $symb eq '') {
219: %Apache::lonhomework::history=
220: &Apache::lonnet::tmprestore($ENV{'request.uri'},'',$domain,$name);
221: my ($temp)=keys %Apache::lonhomework::history ;
222: &Apache::lonxml::debug("Return message of $temp");
223: } else {
224: %Apache::lonhomework::history=
225: &Apache::lonnet::restore($symb,$courseid,$domain,$name);
226: }
227: #ignore error conditions
228: my ($temp)=keys %Apache::lonhomework::history ;
229: if ($temp =~ m/^error:.*/) { %Apache::lonhomework::history=(); }
230: }
231:
232: # -------------------------------------------------------------finalize_storage
233: # Stores away the result has to a student's environment
234: # checks form.grade_ for specific values, other wises stores
235: # to the running users environment
236: sub finalize_storage {
237: my $result;
238: my ($temp) = keys %Apache::lonhomework::results;
239: if ( $temp ne '' ) {
240: my ($symb,$courseid,$domain,$name) = &Apache::lonxml::whichuser();
241: if ($ENV{'request.state'} eq 'construct' || $symb eq '') {
242: $Apache::lonhomework::results{'rndseed'}=$ENV{'form.rndseed'};
243: $result=&Apache::lonnet::tmpstore(\%Apache::lonhomework::results,
244: $ENV{'request.uri'},'',$domain,$name);
245: &Apache::lonxml::debug('Construct Store return message:'.$result);
246: } else {
247: $result=&Apache::lonnet::cstore(\%Apache::lonhomework::results,
248: $symb,$courseid,$domain,$name);
249: &Apache::lonxml::debug('Store return message:'.$result);
250: }
251: }
252: return $result;
253: }
254:
255: sub checkout_msg {
256: return (<<ENDCHECKOUT);
257: <h2>The resource needs to be checked out</h2>
258: As a resource gets checked out, a unique timestamped ID is given to it, and a
259: permanent record is left in the system.<p />
260: <font color=red>
261: Checking out resources is subject to course policies, and may exclude future
262: credit even if done erroneously.<p />
263: </font>
264: <form name="checkout" method="POST" action="$ENV{'request.uri'}">
265: <input type="hidden" name="doescheckout" value="yes" />
266: <input type="button" name="checkoutbutton" value="Check out Exam for Viewing" onClick="javascript:if (confirm('Check out Exam?')) { document.checkout.submit(); }" />
267: </form>
268: ENDCHECKOUT
269: }
270:
271: sub start_problem {
272: my ($target,$token,$tagstack,$parstack,$parser,$safeeval)=@_;
273:
274: if ( $Apache::inputtags::part ne '' ||
275: $Apache::lonhomework::parsing_a_problem) {
276: &Apache::lonxml::error('Only one <problem> allowed in a .problem file');
277: #my $bodytext=&Apache::lonxml::get_all_text("/problem",$parser);
278: return '';
279: }
280:
281: $Apache::lonhomework::parsing_a_problem=1;
282: #initialize globals
283: $Apache::inputtags::part='0';
284: @Apache::inputtags::partlist=('0');
285: @Apache::inputtags::responselist = ();
286: @Apache::inputtags::importlist = ();
287: @Apache::inputtags::previous=();
288: @Apache::inputtags::previous_version=();
289: $Apache::structuretags::printanswer='No';
290: @Apache::structuretags::whileconds=();
291: @Apache::structuretags::whilebody=();
292: @Apache::structuretags::whileline=();
293: $Apache::lonhomework::scantronmode=0;
294: $Apache::lonhomework::problemstatus=
295: &Apache::lonnet::EXT('resource.0.problemstatus');
296:
297: if (defined($ENV{'scantron.maxquest'})) {
298: $Apache::lonhomework::scantronmode=1;
299: }
300:
301: if ($target ne 'analyze') {
302: &initialize_storage();
303: if ($target eq 'web') {
304: &Apache::lonhomework::showhash(%Apache::lonhomework::history);
305: }
306: $Apache::lonhomework::type=&Apache::lonnet::EXT('resource.0.type');
307: &Apache::lonxml::debug("Found this to be of type :$Apache::lonhomework::type:");
308: }
309: if ($Apache::lonhomework::type eq '' ) {
310: my $uri=$ENV{'request.uri'};
311: if ($uri=~/\.(\w+)$/) {
312: $Apache::lonhomework::type=$1;
313: &Apache::lonxml::debug("Using type of $1");
314: } else {
315: $Apache::lonhomework::type='problem';
316: &Apache::lonxml::debug("Using default type, problem, :$uri:");
317: }
318: }
319:
320: #added vars to the scripting enviroment
321: my $expression='$external::part='.$Apache::inputtags::part.';';
322: &Apache::run::run($expression,$safeeval);
323: my $status;
324: my $accessmsg;
325:
326: #should get back a <html> or the neccesary stuff to start XML/MathML
327: my ($result,$head_tag_start,$body_tag_start,$form_tag_start)=
328: &page_start($target,$token,$tagstack,$parstack,$parser,$safeeval);
329: if ($target eq 'tex' and $ENV{'request.symb'} =~ m/\.page_/) {$result='';}
330:
331: if ($target eq 'analyze') { my $rndseed=&setup_rndseed($safeeval); }
332: if ($target eq 'web' || $target eq 'grade' || $target eq 'answer' ||
333: $target eq 'tex') {
334: #handle exam checkout
335: if ($Apache::lonhomework::type eq 'exam') {
336: my $token=
337: $Apache::lonhomework::history{"resource.0.outtoken"};
338: if (($ENV{'form.doescheckout'}) && (!$token)) {
339: $token=&Apache::lonxml::maketoken();
340: $Apache::lonhomework::history{"resource.0.outtoken"}=
341: $token;
342: }
343: $body_tag_start.=&Apache::lonxml::printtokenheader($target,$token);
344: }
345:
346: #handle rand seed in construction space
347: my $rndseed=&setup_rndseed($safeeval);
348: my ($symb)=&Apache::lonxml::whichuser();
349: if ($ENV{'request.state'} ne "construct" && $symb eq '') {
350: $form_tag_start.='<input type="hidden" name="rndseed" value="'.
351: $rndseed.'" />'.
352: '<input type="submit" name="resetdata"
353: value="New Problem Variation" />'.
354: '<input type="hidden" name="username"
355: value="'.$ENV{'form.username'}.'" /> <br />';
356: }
357: ($status,$accessmsg) = &Apache::lonhomework::check_access('0');
358: push (@Apache::inputtags::status,$status);
359: my $expression='$external::datestatus="'.$status.'";';
360: $expression.='$external::gradestatus="'.$Apache::lonhomework::history{"resource.0.solved"}.'";';
361: &Apache::run::run($expression,$safeeval);
362: &Apache::lonxml::debug("Got $status");
363: if (( $status eq 'CLOSED' ) ||
364: ( $status eq 'UNCHECKEDOUT') ||
365: ( $status eq 'BANNED') ||
366: ( $status eq 'UNAVAILABLE')) {
367: my $bodytext=&Apache::lonxml::get_all_text("/problem",$parser);
368: if ( $target eq "web" ) {
369: $result.= $head_tag_start.'</head>';
370: my $msg=$body_tag_start;
371: if ($status eq 'UNAVAILABLE') {
372: $result.='<h1>Unable to determine if this resource is open due to network problems. Please try again later.</h1>';
373: } else {
374: $result.='<h1>Not open to be viewed</h1>';
375: }
376: if ($status eq 'CLOSED') {
377: $msg.='The problem '.$accessmsg;
378: } elsif ($status eq 'UNCHECKEDOUT') {
379: $msg.=&checkout_msg;
380: }
381: $result.=$msg.'<br />';
382: } elsif ($target eq 'tex') {
383: $result.='\begin{document}\noindent \vskip 1 mm \begin{minipage}{\textwidth}\vskip 0 mm';
384: if ($status eq 'UNAVAILABLE') {
385: $result.='Unable to determine if this resource is open due to network problems. Please try again later.\vskip 0 mm ';
386: } else {
387: $result.="Problem is not open to be viewed. It $accessmsg \\vskip 0 mm ";
388: }
389: }
390: } elsif ($target eq 'web') {
391: my $name= &get_resource_name($parstack,$safeeval);
392: if ($status eq 'CAN_ANSWER') {
393: # create a page header and exit
394: $result.="$head_tag_start<title>$name</title></head>
395: $body_tag_start \n $form_tag_start".
396: '<input type="hidden" name="submitted" value="yes" />';
397: if ($ENV{'request.state'} eq "construct") {
398: $result.= &problem_web_to_edit_header($ENV{'form.rndseed'});
399: }
400: # if we are viewing someone else preserve that info
401: if (defined $ENV{'form.grade_symb'}) {
402: foreach my $field ('symb','courseid','domain','username') {
403: $result .= '<input type="hidden" name="grade_'.$field.
404: '" value="'.$ENV{"form.grade_$field"}.'" />'."\n";
405: }
406: }
407: } elsif ($status eq 'SHOW_ANSWER' || $status eq 'CANNOT_ANSWER'
408: || $status eq 'CLOSED' || $status eq 'UNAVALAILABLE') {
409: $result.=$head_tag_start.
410: "<title>$name</title></head>\n$body_tag_start\n";
411: }
412: } elsif ($target eq 'tex') {
413: my $startminipage = '';
414: if (not $ENV{'form.problem_split'}=~/yes/) {
415: $startminipage = '\begin{minipage}{\textwidth}';
416: }
417: my $name= &Apache::lonxml::get_param('name',$parstack,$safeeval);
418: if ($name eq '') {
419: $name=&Apache::lonnet::EXT('resource.title');
420: if ($name eq 'con_lost') { $name = ''; }
421: }
422: $Apache::lonhomework::name=$name;
423: my $id = $Apache::inputtags::part;
424: my $weight = &Apache::lonnet::EXT("resource.$id.weight");
425: my $allkeys=&Apache::lonnet::metadata($ENV{'request.uri'},'keys');
426: my @allkeys = split /,/,$allkeys;
427: my $allow_print_points = 0;
428: foreach my $partial_key (@allkeys) {
429: if ($partial_key=~m/weight/) {
430: $allow_print_points++;
431: }
432: }
433: my $duedate = &Apache::lonnet::EXT("resource.$id.duedate");
434: $duedate = POSIX::strftime("%c",localtime($duedate));
435: my $temp_file;
436: my $filename = "/home/httpd/prtspool/$ENV{'user.name'}_$ENV{'user.domain'}_printout.due";
437: if (-e $filename) {
438: $temp_file = Apache::File->new($filename);
439: } else {
440: $temp_file = Apache::File->new('>>'.$filename);
441: }
442: my @due_file_content = <$temp_file>;
443: my $due_file_content = $due_file_content[$#due_file_content];
444: chomp $due_file_content;
445: my $name_of_resourse= &get_resource_name($parstack,$safeeval);
446: if ($due_file_content ne $duedate) {
447: $temp_file = Apache::File->new('>'.$filename);
448: print $temp_file "$duedate\n";
449: if (not $ENV{'request.symb'} =~ m/\.page_/) {
450: if(not $duedate=~m/1969/ and $Apache::lonhomework::type ne 'exam') {
451: $result .= '\begin{document} \typeout{STAMPOFPASSEDRESOURCESTART Resource <h2>"'.$name_of_resourse.'"</h2> located in <br /><small><b>'.$ENV{'request.uri'}.'</b></small><br /> STAMPOFPASSEDRESOURCEEND} \noindent\textit{Due date: '.$duedate.'} \vskip 1 mm\noindent '.$startminipage;
452: } else {
453: $result .= '\begin{document} \typeout{STAMPOFPASSEDRESOURCESTART Resource <h2>"'.$name_of_resourse.'"</h2> located in <br /><small><b>'.$ENV{'request.uri'}.'</b></small><br /> STAMPOFPASSEDRESOURCEEND} \noindent \vskip 1 mm \noindent'.$startminipage;
454: if ($Apache::lonhomework::type eq 'exam' and $allow_print_points==1) { $result .= '\fbox{\textit{'.$weight.' pt}}';}
455: }
456: } else {
457: $result .= '\vskip 1mm\textit{Due date: '.$duedate.'} \\\\\\\\';
458: }
459: } else {
460: if (not $ENV{'request.symb'} =~ m/\.page_/) {
461: $result .= '\begin{document} \typeout{STAMPOFPASSEDRESOURCESTART Resource <h2>"'.$name_of_resourse.'"</h2> located in <br /><small><b>'.$ENV{'request.uri'}.'</b></small><br /> STAMPOFPASSEDRESOURCEEND} \noindent \vskip 1 mm\noindent'.$startminipage;
462: if (($Apache::lonhomework::type eq 'exam') and ($allow_print_points==1)) { $result .= '\fbox{\textit{'.$weight.' pt}}';}
463: } else {
464: $result .= '\vskip 1mm \\\\\\\\';
465: }
466: }
467: }
468: } elsif ($target eq 'edit') {
469: $result.=$head_tag_start."</head>".$body_tag_start.$form_tag_start.
470: &problem_edit_header();
471: my $temp=&Apache::edit::insertlist($target,$token);
472: $result.=$temp;
473: } elsif ($target eq 'modified') {
474: $result=$token->[4];
475: $result.=&Apache::edit::handle_insert();
476: } else {
477: # page_start returned a starting result, delete it if we don't need it
478: $result = '';
479: }
480: return $result;
481: }
482:
483: sub end_problem {
484: my ($target,$token,$tagstack,$parstack,$parser,$safeeval)=@_;
485: my $result='';
486: my $status=$Apache::inputtags::status['-1'];
487: if ($target eq 'grade' || $target eq 'web' || $target eq 'answer' ||
488: $target eq 'tex') {
489: if ( $target eq 'grade' && $Apache::inputtags::part eq '0' &&
490: $status eq 'CAN_ANSWER' ) {
491: # if part is zero, no <part>s existed, so we need to the grading
492: &Apache::inputtags::grade;
493: } elsif ( ($target eq 'web' || $target eq 'tex') &&
494: $Apache::inputtags::part eq '0' &&
495: $status ne 'UNCHECKEDOUT') {
496: # if part is zero, no <part>s existed, so we need show the current
497: # grading status
498: my $gradestatus = &Apache::inputtags::gradestatus($Apache::inputtags::part,$target);
499: $result.= $gradestatus;
500: }
501: if (
502: (($target eq 'web') && ($ENV{'request.state'} ne 'construct')) ||
503: ($target eq 'answer') || ($target eq 'tex')
504: ) {
505: if ($status eq 'CAN_ANSWER') {
506: if ($target ne 'tex' &&
507: $ENV{'form.answer_output_mode'} ne 'tex') {
508: $result.="</form></body>\n";
509: }
510: } elsif ($status eq 'SHOW_ANSWER' || $status eq 'CANNOT_ANSWER' ||
511: $status eq 'UNCHECKEDOUT' ) {
512: if ($target ne 'tex' &&
513: $ENV{'form.answer_output_mode'} ne 'tex') {
514: $result.="</body>\n";
515: }
516: }
517: if ($target eq 'web') {
518: $result.=&Apache::lonxml::xmlend();
519: } elsif ($target eq 'tex') {
520: my $endminipage = '';
521: if (not $ENV{'form.problem_split'}=~/yes/) {
522: $endminipage = '\end{minipage}';
523: }
524: $result .= '\keephidden{ENDOFPROBLEM}\vskip 0.5mm\noindent\makebox[\textwidth/$number_of_columns][b]{\hrulefill}';
525: if (not $ENV{'request.symb'} =~ m/\.page_/) {
526: $result .= $endminipage.'\end{document} ';
527: } else {
528: $result .= '';
529: }
530: }
531: }
532: if ($target eq 'grade') {
533: &Apache::lonhomework::showhash(%Apache::lonhomework::results);
534: &finalize_storage();
535: }
536: if ($target eq 'answer' && ($ENV{'request.state'} eq 'construct')
537: && $ENV{'form.answer_output_mode'} ne 'tex') {
538: $result.='</html>'; # normally we get it from xmlend, but in CSTR
539: # we always show answer mode too.
540: }
541: } elsif ($target eq 'meta') {
542: if ($Apache::inputtags::part eq '0') {
543: @Apache::inputtags::response=();
544: $result=&Apache::response::mandatory_part_meta;
545: }
546: } elsif ($target eq 'edit') {
547: &Apache::lonxml::debug("in end_problem with $target, edit");
548: $result = &problem_edit_footer();
549: }
550:
551: if ($ENV{'request.state'} eq 'construct' && $target eq 'web') {
552: &Apache::inputtags::check_for_duplicate_ids();
553: }
554: undef(%Apache::lonhomework::history);
555: undef(%Apache::lonhomework::results);
556: undef($Apache::inputtags::part);
557: undef($Apache::lonhomework::parsing_a_problem);
558:
559: return $result;
560: }
561:
562:
563: sub start_library {
564: my ($target,$token,$tagstack,$parstack,$parser,$safeeval)=@_;
565: my ($result,$head_tag_start,$body_tag_start,$form_tag_start);
566:
567: if ($target eq 'edit') {
568: ($result,$head_tag_start,$body_tag_start,$form_tag_start)=
569: &page_start($target,$token,$tagstack,$parstack,$parser,$safeeval);
570: $result.=$head_tag_start."</head>".$body_tag_start.$form_tag_start.
571: &problem_edit_header();
572: my $temp=&Apache::edit::insertlist($target,$token);
573: $result.=$temp;
574: } elsif ($target eq 'modified') {
575: $result=$token->[4];
576: $result.=&Apache::edit::handle_insert();
577: } elsif ($target eq 'web' && $$tagstack[0] ne 'problem' &&
578: $ENV{'request.state'} eq "construct" ) {
579: ($result,$head_tag_start,$body_tag_start,$form_tag_start)=
580: &page_start($target,$token,$tagstack,$parstack,$parser,$safeeval);
581: my $name=&get_resource_name($parstack,$safeeval);
582: my $rndseed=&setup_rndseed($safeeval);
583: $result.="$head_tag_start<title>$name</title></head>
584: $body_tag_start \n $form_tag_start".
585: '<input type="hidden" name="submitted" value="yes" />';
586: $result.=&problem_web_to_edit_header($rndseed);
587: }
588: return $result;
589: }
590:
591: sub end_library {
592: my ($target,$token,$tagstack,$parstack,$parser,$safeeval)=@_;
593: my $result='';
594: if ($target eq 'edit') {
595: $result=&problem_edit_footer();
596: } elsif ($target eq 'web' && $$tagstack[0] ne 'problem' &&
597: $ENV{'request.state'} eq "construct") {
598: $result.='</form></body>'.&Apache::lonxml::xmlend();
599: }
600: return $result;
601: }
602:
603: sub start_definetag {
604: my ($target,$token,$tagstack,$parstack,$parser,$safeeval)=@_;
605:
606: my $result;
607:
608: my $name = $token->[2]->{'name'};
609: my $skip=&Apache::lonxml::get_all_text("/definetag",$parser);
610: if ($name=~/^\//) {
611: $result=
612: '<br /><table bgcolor="#FFBBBB"><tr><th>END <tt>'.$name.'</tt></th></tr>';
613: } else {
614: $result=
615: '<br /><table bgcolor="#BBFFBB"><tr><th>BEGIN <tt>'.$name.'</tt></th></tr>';
616: }
617: $skip=~s/\</\<\;/gs;
618: $skip=~s/\>/\>\;/gs;
619: $result.='<tr><td><pre>'.$skip.'</pre></td></tr></table>';
620: return $result;
621: }
622:
623: sub end_definetag {
624: return '';
625: }
626:
627: sub start_block {
628: my ($target,$token,$tagstack,$parstack,$parser,$safeeval)=@_;
629:
630: my $result;
631:
632: if ($target eq 'web' || $target eq 'grade' || $target eq 'answer' ||
633: $target eq 'tex' || $target eq 'analyze') {
634: my $code = $token->[2]->{'condition'};
635: if ($code) {
636: if (!$Apache::lonxml::default_homework_loaded) {
637: &Apache::lonxml::default_homework_load($safeeval);
638: }
639: $result = &Apache::run::run($code,$safeeval);
640: &Apache::lonxml::debug("block :$code: returned :$result:");
641: } else {
642: $result='1';
643: }
644: if ( ! $result ) {
645: my $skip=&Apache::lonxml::get_all_text("/block",$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('Test Condition:','condition',
652: $token,40);
653: $result .=&Apache::edit::end_row().&Apache::edit::start_spanning_row();
654: } elsif ($target eq 'modified') {
655: my $constructtag=&Apache::edit::get_new_args($token,$parstack,
656: $safeeval,'condition');
657: if ($constructtag) { $result = &Apache::edit::rebuild_tag($token); }
658: }
659: return $result;
660: }
661:
662: sub end_block {
663: my ($target,$token,$tagstack,$parstack,$parser,$safeeval)=@_;
664: my $result;
665: if ($target eq "edit") {
666: $result.= &Apache::edit::tag_end($target,$token,'');
667: }
668: return $result;
669: }
670:
671: sub start_languageblock {
672: my ($target,$token,$tagstack,$parstack,$parser,$safeeval)=@_;
673:
674: my $result;
675:
676: if ($target eq 'web' || $target eq 'grade' || $target eq 'answer' ||
677: $target eq 'tex' || $target eq 'analyze') {
678: &Apache::lonxml::startredirection();
679: } elsif ($target eq 'edit') {
680: $result .=&Apache::edit::tag_start($target,$token);
681: $result .=&Apache::edit::text_arg('Include Language:','include',
682: $token,40);
683: $result .=&Apache::edit::text_arg('Exclude Language:','exclude',
684: $token,40);
685: $result .=&Apache::edit::end_row().&Apache::edit::start_spanning_row();
686: } elsif ($target eq 'modified') {
687: my $constructtag=&Apache::edit::get_new_args($token,$parstack,
688: $safeeval,'include',
689: 'exclude');
690: if ($constructtag) { $result = &Apache::edit::rebuild_tag($token); }
691: }
692: return $result;
693: }
694:
695: sub end_languageblock {
696: my ($target,$token,$tagstack,$parstack,$parser,$safeeval)=@_;
697: my $result;
698:
699: if ($target eq 'web' || $target eq 'grade' || $target eq 'answer' ||
700: $target eq 'tex' || $target eq 'analyze') {
701: my $text=&Apache::lonxml::endredirection();
702: my $include= &Apache::lonxml::get_param('include',$parstack,$safeeval);
703: my $exclude= &Apache::lonxml::get_param('exclude',$parstack,$safeeval);
704: my %languages=&Apache::loncommon::display_languages();
705: $result='1';
706: if ($include) {
707: $result='';
708: foreach (split(/\,/,$include)) {
709: if ($languages{$_}) { $result='1'; }
710: }
711: }
712: if ($exclude) {
713: foreach (split(/\,/,$exclude)) {
714: if ($languages{$_}) { $result='0'; }
715: }
716: }
717: if ( ! $result ) {
718: $result='';
719: } else {
720: $result=$text;
721: }
722: } elsif ($target eq "edit") {
723: $result.= &Apache::edit::tag_end($target,$token,'');
724: }
725: return $result;
726: }
727:
728: sub start_instructorcomment {
729: my ($target,$token,$tagstack,$parstack,$parser,$safeeval)=@_;
730:
731: my $result;
732:
733: if ($target eq 'web' || $target eq 'grade' || $target eq 'answer' ||
734: $target eq 'tex' || $target eq 'analyze') {
735: $result=($ENV{'request.role'}=~/^(in|cc|au|ca|li)/);
736: if ( ! $result ) {
737: my $skip=&Apache::lonxml::get_all_text("/instructorcomment",$parser);
738: &Apache::lonxml::debug("skipping ahead :$skip: $$parser[-1]");
739: }
740: $result='';
741: } elsif ($target eq 'edit') {
742: $result .=&Apache::edit::tag_start($target,$token);
743: $result .=&Apache::edit::end_row().&Apache::edit::start_spanning_row();
744: }
745: return $result;
746: }
747:
748: sub end_instructorcomment {
749: my ($target,$token,$tagstack,$parstack,$parser,$safeeval)=@_;
750: my $result;
751: if ($target eq "edit") {
752: $result.= &Apache::edit::tag_end($target,$token,'');
753: }
754: return $result;
755: }
756:
757: sub start_while {
758: my ($target,$token,$tagstack,$parstack,$parser,$safeeval)=@_;
759:
760: my $result;
761: if ($target eq 'web' || $target eq 'grade' || $target eq 'answer' ||
762: $target eq 'tex' || $target eq 'analyze') {
763: my $code = $token->[2]->{'condition'};
764:
765: push( @Apache::structuretags::whileconds, $code);
766: if (!$Apache::lonxml::default_homework_loaded) {
767: &Apache::lonxml::default_homework_load($safeeval);
768: }
769: my $result = &Apache::run::run($code,$safeeval);
770: my $bodytext=&Apache::lonxml::get_all_text("/while",$parser);
771: push( @Apache::structuretags::whilebody, $bodytext);
772: push( @Apache::structuretags::whileline, $token->[5]);
773: &Apache::lonxml::debug("s code $code got -$result-");
774: if ( $result ) {
775: &Apache::lonxml::newparser($parser,\$bodytext);
776: }
777: } elsif ($target eq 'edit') {
778: $result .=&Apache::edit::tag_start($target,$token);
779: $result .=&Apache::edit::text_arg('Test Condition:','condition',
780: $token,40);
781: $result .=&Apache::edit::end_row().&Apache::edit::start_spanning_row();
782: } elsif ($target eq 'modified') {
783: my $constructtag=&Apache::edit::get_new_args($token,$parstack,
784: $safeeval,'condition');
785: if ($constructtag) { $result = &Apache::edit::rebuild_tag($token); }
786: }
787: return $result;
788: }
789:
790: sub end_while {
791: my ($target,$token,$tagstack,$parstack,$parser,$safeeval)=@_;
792: my $result;
793:
794: if ($target eq 'web' || $target eq 'grade' || $target eq 'answer' ||
795: $target eq 'tex' || $target eq 'analyze') {
796: my $code = pop(@Apache::structuretags::whileconds);
797: my $bodytext = pop(@Apache::structuretags::whilebody);
798: my $line = pop(@Apache::structuretags::whileline);
799: my $return = &Apache::run::run($code,$safeeval);
800: my $starttime=time;
801: my $error=0;
802: while ($return) {
803: if (time-$starttime >
804: $Apache::lonnet::perlvar{'lonScriptTimeout'}) {
805: $return = 0; $error=1; next;
806: }
807: $result.=&Apache::scripttag::xmlparse($bodytext);
808: $return = &Apache::run::run($code,$safeeval);
809: }
810: if ($error) {
811: &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 '.$line.'</pre>');
812: }
813: } elsif ($target eq "edit") {
814: $result.= &Apache::edit::tag_end($target,$token,'');
815: }
816: return $result;
817: }
818:
819: # <randomlist show="1">
820: # <tag1>..</tag1>
821: # <tag2>..</tag2>
822: # <tag3>..</tag3>
823: # ...
824: # </randomlist>
825: sub start_randomlist {
826: my ($target,$token,$tagstack,$parstack,$parser,$safeeval)=@_;
827: my $result;
828: if ($target eq 'answer' || $target eq 'grade' || $target eq 'web' ||
829: $target eq 'tex' || $target eq 'analyze') {
830: my $body= &Apache::lonxml::get_all_text("/randomlist",$parser);
831: my $b_parser= HTML::TokeParser->new(\$body);
832: my $b_tok;
833: my @randomlist;
834: my $list_item;
835: while($b_tok = $b_parser->get_token() ) {
836: if($b_tok->[0] eq 'S') { # start tag
837: # get content of the tag until matching end tag
838: # get all text upto the matching tag
839: # and push the content into @randomlist
840: $list_item = &Apache::lonxml::get_all_text('/'.$b_tok->[1],
841: $b_parser);
842: $list_item = "$b_tok->[4]"."$list_item"."</$b_tok->[1]>";
843: push(@randomlist,$list_item);
844: # print "<br /><b>START-TAG $b_tok->[1], $b_tok->[4],
845: # $list_item</b>";
846: }
847: if($b_tok->[0] eq 'T') { # text
848: # what to do with text in between tags?
849: # print "<b>TEXT $b_tok->[1]</b><br />";
850: }
851: # if($b_tok->[0] eq 'E') { # end tag, should not happen
852: # print "<b>END-TAG $b_tok->[1]</b><br />";
853: # }
854: }
855: my @idx_arr = (0 .. $#randomlist);
856: &Apache::structuretags::shuffle(\@idx_arr);
857: my $bodytext = '';
858: my $show=$#randomlist;
859: my $showarg=&Apache::lonxml::get_param('show',$parstack,$safeeval);
860: $showarg--;
861: if ( ($showarg >= 0) && ($showarg < $show) ) { $show = $showarg; }
862: for(0 .. $show) {
863: $bodytext .= "$randomlist[ $idx_arr[$_] ]";
864: }
865: &Apache::lonxml::newparser($parser,\$bodytext);
866: } elsif ($target eq 'edit' ) {
867: $result .=&Apache::edit::tag_start($target,$token);
868: $result .=&Apache::edit::text_arg('Maximum Tags to Show:','show',
869: $token,5);
870: $result .=&Apache::edit::end_row().&Apache::edit::start_spanning_row();
871: } elsif ($target eq 'modified' ) {
872: my $constructtag=&Apache::edit::get_new_args($token,$parstack,
873: $safeeval,'show');
874: if ($constructtag) { $result = &Apache::edit::rebuild_tag($token); }
875: }
876: return $result;
877: }
878:
879: sub shuffle {
880: my $a=shift;
881: my $i;
882: if (defined(@$a)) {
883: &Apache::response::setrandomnumber();
884: for($i=@$a;--$i;) {
885: my $j=int(&Math::Random::random_uniform() * ($i+1));
886: next if $i == $j;
887: @$a[$i,$j] = @$a[$j,$i];
888: }
889: }
890: }
891:
892: sub end_randomlist {
893: my ($target,$token,$tagstack,$parstack,$parser,$safeeval)=@_;
894: my $result;
895: if ($target eq 'edit' ) {
896: $result=&Apache::edit::tag_end($target,$token,
897: 'End Randomly Parsed Block');
898: }
899: return $result;
900: }
901:
902: sub start_part {
903: my ($target,$token,$tagstack,$parstack,$parser,$safeeval)=@_;
904: my $result='';
905: my $id= &Apache::lonxml::get_param('id',$parstack,$safeeval);
906: if ($id eq '') { $id = $Apache::lonxml::curdepth; }
907: $Apache::inputtags::part=$id;
908: push(@Apache::inputtags::partlist,$id);
909: @Apache::inputtags::response=();
910: @Apache::inputtags::previous=();
911: @Apache::inputtags::previous_version=();
912: $Apache::lonhomework::problemstatus=
913: &Apache::lonnet::EXT("resource.$id.problemstatus");
914: my $hidden=&Apache::loncommon::check_if_partid_hidden($Apache::inputtags::part);
915:
916: if ($target eq 'meta') {
917: return &Apache::response::mandatory_part_meta;
918: } elsif ($target eq 'web' || $target eq 'grade' ||
919: $target eq 'answer' || $target eq 'tex') {
920: if ($hidden) {
921: my $bodytext=&Apache::lonxml::get_all_text("/part",$parser);
922: } else {
923: my ($status,$accessmsg) = &Apache::lonhomework::check_access($id);
924: push (@Apache::inputtags::status,$status);
925: my $expression='$external::datestatus="'.$status.'";';
926: $expression.='$external::gradestatus="'.$Apache::lonhomework::history{"resource.$id.solved"}.'";';
927: &Apache::run::run($expression,$safeeval);
928: if ( $status eq 'CLOSED' ) {
929: my $bodytext=&Apache::lonxml::get_all_text("/part",$parser);
930: if ( $target eq "web" ) {
931: $result="<br />Part is not open to be viewed. It $accessmsg<br />";
932: } elsif ( $target eq 'tex' ) {
933: if (not $ENV{'form.problem_split'}=~/yes/) {
934: $result="\\end{minipage}\\vskip 0 mm Part is not open to be viewed. It $accessmsg \\\\\\begin{minipage}{\\textwidth}";
935: } else {
936: $result="\\vskip 0 mm Part is not open to be viewed. It $accessmsg \\\\";
937: }
938: }
939: } else {
940: if ($target eq 'tex') {
941: if (not $ENV{'form.problem_split'}=~/yes/) {
942: $result.='\noindent \end{minipage}\vskip 0 mm \noindent \begin{minipage}{\textwidth}\noindent';
943: }
944: my $weight = &Apache::lonnet::EXT("resource.$id.weight");
945: if ($Apache::lonhomework::type eq 'exam') { $result .= '\fbox{\textit{'.$weight.' pt}}';}
946: }
947: }
948: }
949: } elsif ($target eq 'edit') {
950: $result.=&Apache::edit::tag_start($target,$token);
951: $result.=&Apache::edit::text_arg('Part ID:','id',$token).
952: &Apache::loncommon::help_open_topic("Part_Tag_Edit_Help").
953: &Apache::edit::end_row().&Apache::edit::start_spanning_row();
954: } elsif ($target eq 'modified') {
955: my $constructtag=&Apache::edit::get_new_args($token,$parstack,
956: $safeeval,'id');
957: if ($constructtag) {
958: $result = &Apache::edit::rebuild_tag($token);
959: $result.=&Apache::edit::handle_insert();
960: }
961: }
962: return $result;
963: }
964:
965: sub end_part {
966: my ($target,$token,$tagstack,$parstack,$parser,$safeeval)=@_;
967: &Apache::lonxml::debug("in end_part $target ");
968: my $status=$Apache::inputtags::status['-1'];
969: my $hidden=&Apache::loncommon::check_if_partid_hidden($Apache::inputtags::part);
970: my $result='';
971: if ( $target eq 'meta' ) {
972: $result='';
973: } elsif ( $target eq 'grade' && $status eq 'CAN_ANSWER' && !$hidden) {
974: $result=&Apache::inputtags::grade;
975: } elsif (($target eq 'web' || $target eq 'tex') && !$hidden ) {
976: my $gradestatus=&Apache::inputtags::gradestatus($Apache::inputtags::part,
977: $target);
978: if ($Apache::lonhomework::type eq 'exam' && $target eq 'tex') {
979: $gradestatus='';
980: }
981: $result=$gradestatus;
982: } elsif ($target eq 'edit') {
983: $result=&Apache::edit::end_table();
984: }
985: pop @Apache::inputtags::status;
986: $Apache::inputtags::part='';
987: return $result;
988: }
989:
990: sub start_preduedate {
991: my ($target,$token,$tagstack,$parstack,$parser,$safeeval)=@_;
992: if ($target eq 'web' || $target eq 'grade' || $target eq 'answer' || $target eq 'tex') {
993: if ($Apache::inputtags::status['-1'] ne 'CAN_ANSWER' &&
994: $Apache::inputtags::status['-1'] ne 'CANNOT_ANSWER' &&
995: $Apache::inputtags::status['-1'] ne 'SHOW_ANSWER') {
996: &Apache::lonxml::get_all_text("/preduedate",$parser);
997: }
998: }
999: return '';
1000: }
1001:
1002: sub end_preduedate {
1003: return '';
1004: }
1005:
1006: sub start_postanswerdate {
1007: my ($target,$token,$tagstack,$parstack,$parser,$safeeval)=@_;
1008: if ($target eq 'web' || $target eq 'grade' || $target eq 'tex') {
1009: if ($Apache::inputtags::status['-1'] ne 'SHOW_ANSWER') {
1010: &Apache::lonxml::get_all_text("/postanswerdate",$parser);
1011: }
1012: } elsif ($target eq 'tex') {
1013: return '\vskip 0 mm \noindent';
1014: }
1015: return '';
1016: }
1017:
1018: sub end_postanswerdate {
1019: return '';
1020: }
1021:
1022: sub start_notsolved {
1023: my ($target,$token,$tagstack,$parstack,$parser,$safeeval)=@_;
1024: if ($target eq 'web' || $target eq 'grade' || $target eq 'answer' ||
1025: $target eq 'tex') {
1026: my $gradestatus=$Apache::lonhomework::history{"resource.$Apache::inputtags::part.solved"};
1027: &Apache::lonxml::debug("not solved has :$gradestatus:");
1028: if ($gradestatus =~ /^correct/) {
1029: &Apache::lonxml::debug("skipping");
1030: &Apache::lonxml::get_all_text("/notsolved",$parser);
1031: }
1032: }
1033: return '';
1034: }
1035:
1036: sub end_notsolved {
1037: return '';
1038: }
1039:
1040: sub start_solved {
1041: my ($target,$token,$tagstack,$parstack,$parser,$safeeval)=@_;
1042: if ($target eq 'web' || $target eq 'grade' || $target eq 'answer' ||
1043: $target eq 'tex') {
1044: my $gradestatus=$Apache::lonhomework::history{"resource.$Apache::inputtags::part.solved"};
1045: if ($gradestatus !~ /^correct/) {
1046: &Apache::lonxml::get_all_text("/solved",$parser);
1047: }
1048: }
1049: return '';
1050: }
1051:
1052: sub end_solved {
1053: return '';
1054: }
1055:
1056: sub start_startouttext {
1057: my ($target,$token,$tagstack,$parstack,$parser,$safeeval)=@_;
1058: my @result=(''.'');
1059: if ($target eq 'edit' || $target eq 'modified' ) { @result=('','no'); }
1060: return (@result);
1061: }
1062:
1063: sub end_startouttext {
1064: my ($target,$token,$tagstack,$parstack,$parser,$safeeval)=@_;
1065: my $result='';
1066: my $text='';
1067:
1068: if ($target eq 'edit') {
1069: $text=&Apache::lonxml::get_all_text("endouttext",$parser);
1070: $result.=&Apache::edit::start_table($token)."<tr><td>Text Block</td>
1071: <td>Delete:".
1072: &Apache::edit::deletelist($target,$token)
1073: ."</td>
1074: <td>".
1075: &Apache::edit::insertlist($target,$token).
1076: &Apache::edit::end_row().
1077: &Apache::edit::start_spanning_row()."\n"
1078: . &Apache::loncommon::helpLatexCheatsheet () .
1079: &Apache::edit::editfield($token->[1],$text,"",80,4);
1080: }
1081: if ($target eq 'modified') {
1082: $text=&Apache::lonxml::get_all_text("endouttext",$parser);
1083: $result='<startouttext />'.&Apache::edit::modifiedfield();
1084: }
1085: if ($target eq 'tex') {
1086: $result .= '\noindent ';
1087: }
1088: return $result;
1089: }
1090:
1091: sub start_endouttext {
1092: my ($target,$token,$tagstack,$parstack,$parser,$safeeval)=@_;
1093: my $result='';
1094: if ($target eq "edit" ) { $result="</td></tr>".&Apache::edit::end_table()."\n"; }
1095: if ($target eq "modified") {
1096: $result='<endouttext />'.
1097: &Apache::edit::handle_insertafter('startouttext'); }
1098: return $result;
1099: }
1100:
1101: sub end_endouttext {
1102: my ($target,$token,$tagstack,$parstack,$parser,$safeeval)=@_;
1103: my @result=('','');
1104: if ($target eq "edit" || $target eq 'modified') { @result=('','no'); }
1105: return (@result);
1106: }
1107:
1108: sub delete_startouttext {
1109: my ($target,$token,$tagstack,$parstack,$parser,$safeeval)=@_;
1110: # my $text=&Apache::lonxml::get_all_text("endouttext",$parser);
1111: my $text=$$parser['-1']->get_text("/endouttext");
1112: my $ntoken=$$parser['-1']->get_token();
1113: &Apache::lonxml::debug("Deleting :$text: and :$ntoken->[0]:$ntoken->[1]:$ntoken->[2]: for startouttext");
1114: &Apache::lonxml::end_tag($tagstack,$parstack,$ntoken);
1115: # Deleting 2 parallel tag pairs, but we need the numbers later to look like
1116: # they did the last time round
1117: &Apache::lonxml::increasedepth($ntoken);
1118: &Apache::lonxml::decreasedepth($ntoken);
1119: return 1;
1120: }
1121:
1122: sub start_simpleeditbutton {
1123: my ($target,$token,$tagstack,$parstack,$parser,$safeeval)=@_;
1124: my $result='';
1125: if (($target eq 'web') &&
1126: (&Apache::lonnet::allowed('srm',$ENV{'request.course.id'}))) {
1127: my $url=$ENV{'REQUEST_URI'};
1128: $url=~s/\?.*$//;
1129: $result='<table width="100%" bgcolor="#FFFFAA" border="2"><tr><td>'.
1130: '<a href="'.$url.'/smpedit">Simple Problem Editor</a> - Note: it can take up to 10 minutes for changes to take effect for all users.'.
1131: &Apache::loncommon::help_open_topic('Caching').'</td></tr></table><br />';
1132: }
1133: return $result;
1134: }
1135:
1136: sub end_simpleeditbutton {
1137: return '';
1138: }
1139:
1140: 1;
1141: __END__
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