1: # The LearningOnline Network with CAPA
2: # definition of tags that give a structure to a document
3: #
4: # $Id: structuretags.pm,v 1.205 2003/08/13 18:49:41 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,$safeeval)=@_;
133: if (defined($Apache::lonhomework::name)) {
134: return $Apache::lonhomework::name;
135: }
136: my $name=&Apache::lonnet::gettitle();
137: if ($name eq '') {
138: $name=&Apache::lonnet::EXT('resource.title');
139: if ($name eq 'con_lost') { $name = ''; }
140: }
141: if ($name!~/\S+/) {
142: $name=$ENV{'request.uri'};
143: $name=~s-.*/([^/]+)$-$1-;
144: }
145: $Apache::lonhomework::name=$name;
146: return $name;
147: }
148:
149: sub setup_rndseed {
150: my ($safeeval)=@_;
151: my $rndseed;
152: my ($symb)=&Apache::lonxml::whichuser();
153: if ($ENV{'request.state'} eq "construct" || $symb eq '') {
154: $rndseed=$ENV{'form.rndseed'};
155: if (!$rndseed) {
156: $rndseed=$Apache::lonhomework::history{'rndseed'};
157: if (!$rndseed) {
158: $rndseed=time;
159: $ENV{'form.rndseed'}=$rndseed;
160: }
161: }
162: if ($ENV{'form.resetdata'} eq 'New Problem Variation' ||
163: $ENV{'form.newrandomization'} eq 'New Randomization') {
164: srand(time);
165: $rndseed=int(rand(2100000000));
166: $ENV{'form.rndseed'}=$rndseed;
167: delete($ENV{'form.resetdata'});
168: delete($ENV{'form.newrandomization'});
169: }
170: if (defined($rndseed) && $rndseed ne int($rndseed)) {
171: $rndseed=join(',',&Math::Random::random_seed_from_phrase($rndseed));
172: }
173: &Apache::lonxml::debug("Setting rndseed to $rndseed");
174: &Apache::run::run('$external::randomseed='.$rndseed.';',$safeeval);
175: }
176: return $rndseed;
177: }
178:
179: sub problem_edit_header {
180: return '<input type="hidden" name="submitted" value="edit" />
181: <input type="hidden" name="problemmode" value="Edit" />
182: <input type="submit" name="problemmode" value="Discard Edits and View" />
183: <input type="submit" name="problemmode" value="EditXML" />
184: <input type="submit" name="Undo" value="undo" /> <hr />
185: <input type="submit" name="submit" value="Submit Changes and Edit" />
186: <input type="submit" name="submit" value="Submit Changes and View" /><br /><p> </p><table border="0"><tr><td bgcolor="#DDDDDD">
187: ';
188: }
189:
190: sub problem_edit_footer {
191: return '</td></tr></table><br /><input type="submit" name="submit" value="Submit Changes and Edit" />
192: <input type="submit" name="submit" value="Submit Changes and View" />';
193: }
194:
195: sub problem_web_to_edit_header {
196: my ($rndseed)=@_;
197: my $result.='<input type="hidden" name="problemmode" value="View" />
198: <input type="submit" name="problemmode" value="Edit" />
199: <input type="submit" name="problemmode" value="EditXML" />
200: <input type="submit" name="newrandomization" value="New Randomization" />
201: <input type="submit" name="resetdata" value="Reset Submissions" />
202: <nobr><input type="submit" name="changerandseed" value="Change Random Seed To:" />
203: <input type="text" name="rndseed" width="10" value="'.
204: $rndseed.'"
205: onChange="javascript:document.lonhomework.changerandseed.click()" /></nobr>
206: <input type="checkbox" name="showallfoils" ';
207: if (defined($ENV{'form.showallfoils'})) { $result.='checked="on"'; }
208: $result.= ' /> Show All Foils
209: <hr />';
210: my $numtoanalyze=$ENV{'form.numtoanalyze'};
211: if (!$numtoanalyze) { $numtoanalyze=20; }
212: $result.= '<input type="submit" name="problemmode" value="Calculate answers" /> for
213: <input type="text" name="numtoanalyze" value="'.
214: $numtoanalyze.'" size="5" /> versions of this problem.'.
215: &Apache::loncommon::help_open_topic("Analyze_Problem",
216: '',undef,undef,300).
217: '<hr />';
218: return $result;
219: }
220:
221: sub initialize_storage {
222: %Apache::lonhomework::results=();
223: %Apache::lonhomework::history=();
224: my ($symb,$courseid,$domain,$name) = &Apache::lonxml::whichuser();
225: if ($ENV{'request.state'} eq 'construct' || $symb eq '') {
226: %Apache::lonhomework::history=
227: &Apache::lonnet::tmprestore($ENV{'request.uri'},'',$domain,$name);
228: my ($temp)=keys %Apache::lonhomework::history ;
229: &Apache::lonxml::debug("Return message of $temp");
230: } else {
231: %Apache::lonhomework::history=
232: &Apache::lonnet::restore($symb,$courseid,$domain,$name);
233: }
234: #ignore error conditions
235: my ($temp)=keys %Apache::lonhomework::history ;
236: if ($temp =~ m/^error:.*/) { %Apache::lonhomework::history=(); }
237: }
238:
239: # -------------------------------------------------------------finalize_storage
240: # Stores away the result has to a student's environment
241: # checks form.grade_ for specific values, other wises stores
242: # to the running users environment
243: sub finalize_storage {
244: my $result;
245: my ($temp) = keys %Apache::lonhomework::results;
246: if ( $temp ne '' ) {
247: my ($symb,$courseid,$domain,$name) = &Apache::lonxml::whichuser();
248: if ($ENV{'request.state'} eq 'construct' || $symb eq '') {
249: $Apache::lonhomework::results{'rndseed'}=$ENV{'form.rndseed'};
250: $result=&Apache::lonnet::tmpstore(\%Apache::lonhomework::results,
251: $ENV{'request.uri'},'',$domain,$name);
252: &Apache::lonxml::debug('Construct Store return message:'.$result);
253: } else {
254: $result=&Apache::lonnet::cstore(\%Apache::lonhomework::results,
255: $symb,$courseid,$domain,$name);
256: &Apache::lonxml::debug('Store return message:'.$result);
257: }
258: }
259: return $result;
260: }
261:
262: sub checkout_msg {
263: return (<<ENDCHECKOUT);
264: <h2>The resource needs to be checked out</h2>
265: As a resource gets checked out, a unique timestamped ID is given to it, and a
266: permanent record is left in the system.<p />
267: <font color=red>
268: Checking out resources is subject to course policies, and may exclude future
269: credit even if done erroneously.<p />
270: </font>
271: <form name="checkout" method="POST" action="$ENV{'request.uri'}">
272: <input type="hidden" name="doescheckout" value="yes" />
273: <input type="button" name="checkoutbutton" value="Check out Exam for Viewing" onClick="javascript:if (confirm('Check out Exam?')) { document.checkout.submit(); }" />
274: </form>
275: ENDCHECKOUT
276: }
277:
278: sub init_problem_globals {
279: my ($type)=@_;
280: #initialize globals
281: if ($type eq 'problem') {
282: $Apache::inputtags::part='0';
283: @Apache::inputtags::partlist=('0');
284: $Apache::lonhomework::problemstatus=
285: &Apache::lonnet::EXT('resource.0.problemstatus');
286: } else {
287: $Apache::inputtags::part='';
288: @Apache::inputtags::partlist=();
289: $Apache::lonhomework::problemstatus='';
290: }
291: @Apache::inputtags::responselist = ();
292: @Apache::inputtags::importlist = ();
293: @Apache::inputtags::previous=();
294: @Apache::inputtags::previous_version=();
295: $Apache::structuretags::printanswer='No';
296: @Apache::structuretags::whileconds=();
297: @Apache::structuretags::whilebody=();
298: @Apache::structuretags::whileline=();
299: $Apache::lonhomework::scantronmode=0;
300: undef($Apache::lonhomework::name);
301:
302: }
303:
304: sub reset_problem_globals {
305: my ($type)=@_;
306: undef(%Apache::lonhomework::history);
307: undef(%Apache::lonhomework::results);
308: undef($Apache::inputtags::part);
309: undef($Apache::lonhomework::parsing_a_problem);
310: undef($Apache::lonhomework::name);
311: }
312:
313: sub start_problem {
314: my ($target,$token,$tagstack,$parstack,$parser,$safeeval)=@_;
315:
316: if ( $Apache::inputtags::part ne '' ||
317: $Apache::lonhomework::parsing_a_problem) {
318: &Apache::lonxml::error('Only one <problem> allowed in a .problem file');
319: #my $bodytext=&Apache::lonxml::get_all_text("/problem",$parser);
320: return '';
321: }
322:
323: $Apache::lonhomework::parsing_a_problem=1;
324: &init_problem_globals('problem');
325:
326: if (defined($ENV{'scantron.maxquest'})) {
327: $Apache::lonhomework::scantronmode=1;
328: }
329:
330: if ($target ne 'analyze') {
331: &initialize_storage();
332: if ($target eq 'web') {
333: &Apache::lonhomework::showhash(%Apache::lonhomework::history);
334: }
335: $Apache::lonhomework::type=&Apache::lonnet::EXT('resource.0.type');
336: &Apache::lonxml::debug("Found this to be of type :$Apache::lonhomework::type:");
337: }
338: if ($Apache::lonhomework::type eq '' ) {
339: my $uri=$ENV{'request.uri'};
340: if ($uri=~/\.(\w+)$/) {
341: $Apache::lonhomework::type=$1;
342: &Apache::lonxml::debug("Using type of $1");
343: } else {
344: $Apache::lonhomework::type='problem';
345: &Apache::lonxml::debug("Using default type, problem, :$uri:");
346: }
347: }
348:
349: #added vars to the scripting enviroment
350: my $expression='$external::part='.$Apache::inputtags::part.';';
351: &Apache::run::run($expression,$safeeval);
352: my $status;
353: my $accessmsg;
354:
355: #should get back a <html> or the neccesary stuff to start XML/MathML
356: my ($result,$head_tag_start,$body_tag_start,$form_tag_start)=
357: &page_start($target,$token,$tagstack,$parstack,$parser,$safeeval);
358: if ($target eq 'tex' and $ENV{'request.symb'} =~ m/\.page_/) {$result='';}
359:
360: if ($target eq 'analyze') { my $rndseed=&setup_rndseed($safeeval); }
361: if ($target eq 'web' || $target eq 'grade' || $target eq 'answer' ||
362: $target eq 'tex') {
363: #handle exam checkout
364: if ($Apache::lonhomework::type eq 'exam') {
365: my $token=
366: $Apache::lonhomework::history{"resource.0.outtoken"};
367: if (($ENV{'form.doescheckout'}) && (!$token)) {
368: $token=&Apache::lonxml::maketoken();
369: $Apache::lonhomework::history{"resource.0.outtoken"}=
370: $token;
371: }
372: $body_tag_start.=&Apache::lonxml::printtokenheader($target,$token);
373: }
374:
375: #handle rand seed in construction space
376: my $rndseed=&setup_rndseed($safeeval);
377: my ($symb)=&Apache::lonxml::whichuser();
378: if ($ENV{'request.state'} ne "construct" && $symb eq '') {
379: $form_tag_start.='<input type="hidden" name="rndseed" value="'.
380: $rndseed.'" />'.
381: '<input type="submit" name="resetdata"
382: value="New Problem Variation" />'.
383: '<input type="hidden" name="username"
384: value="'.$ENV{'form.username'}.'" /> <br />';
385: }
386: ($status,$accessmsg) = &Apache::lonhomework::check_access('0');
387: push (@Apache::inputtags::status,$status);
388: my $expression='$external::datestatus="'.$status.'";';
389: $expression.='$external::gradestatus="'.$Apache::lonhomework::history{"resource.0.solved"}.'";';
390: &Apache::run::run($expression,$safeeval);
391: &Apache::lonxml::debug("Got $status");
392: if (( $status eq 'CLOSED' ) ||
393: ( $status eq 'UNCHECKEDOUT') ||
394: ( $status eq 'BANNED') ||
395: ( $status eq 'UNAVAILABLE')) {
396: my $bodytext=&Apache::lonxml::get_all_text("/problem",$parser);
397: if ( $target eq "web" ) {
398: $result.= $head_tag_start.'</head>';
399: my $msg=$body_tag_start;
400: if ($status eq 'UNAVAILABLE') {
401: $result.='<h1>Unable to determine if this resource is open due to network problems. Please try again later.</h1>';
402: } else {
403: $result.='<h1>Not open to be viewed</h1>';
404: }
405: if ($status eq 'CLOSED') {
406: $msg.='The problem '.$accessmsg;
407: } elsif ($status eq 'UNCHECKEDOUT') {
408: $msg.=&checkout_msg;
409: }
410: $result.=$msg.'<br />';
411: } elsif ($target eq 'tex') {
412: $result.='\begin{document}\noindent \vskip 1 mm \begin{minipage}{\textwidth}\vskip 0 mm';
413: if ($status eq 'UNAVAILABLE') {
414: $result.='Unable to determine if this resource is open due to network problems. Please try again later.\vskip 0 mm ';
415: } else {
416: $result.="Problem is not open to be viewed. It $accessmsg \\vskip 0 mm ";
417: }
418: }
419: } elsif ($target eq 'web') {
420: my $name= &get_resource_name($parstack,$safeeval);
421: if ($status eq 'CAN_ANSWER') {
422: # create a page header and exit
423: $result.="$head_tag_start<title>$name</title></head>
424: $body_tag_start \n $form_tag_start".
425: '<input type="hidden" name="submitted" value="yes" />';
426: if ($ENV{'request.state'} eq "construct") {
427: $result.= &problem_web_to_edit_header($ENV{'form.rndseed'});
428: }
429: # if we are viewing someone else preserve that info
430: if (defined $ENV{'form.grade_symb'}) {
431: foreach my $field ('symb','courseid','domain','username') {
432: $result .= '<input type="hidden" name="grade_'.$field.
433: '" value="'.$ENV{"form.grade_$field"}.'" />'."\n";
434: }
435: }
436: } elsif ($status eq 'SHOW_ANSWER' || $status eq 'CANNOT_ANSWER'
437: || $status eq 'CLOSED' || $status eq 'UNAVALAILABLE') {
438: $result.=$head_tag_start.
439: "<title>$name</title></head>\n$body_tag_start\n";
440: }
441: } elsif ($target eq 'tex') {
442: my $startminipage = '';
443: if (not $ENV{'form.problem_split'}=~/yes/) {
444: $startminipage = '\begin{minipage}{\textwidth}';
445: }
446: my $id = $Apache::inputtags::part;
447: my $weight = &Apache::lonnet::EXT("resource.$id.weight");
448: my $allkeys=&Apache::lonnet::metadata($ENV{'request.uri'},'keys');
449: my @allkeys = split /,/,$allkeys;
450: my $allow_print_points = 0;
451: foreach my $partial_key (@allkeys) {
452: if ($partial_key=~m/weight/) {
453: $allow_print_points++;
454: }
455: }
456: my $duedate = &Apache::lonnet::EXT("resource.$id.duedate");
457: $duedate = POSIX::strftime("%c",localtime($duedate));
458: my $temp_file;
459: my $filename = "/home/httpd/prtspool/$ENV{'user.name'}_$ENV{'user.domain'}_printout.due";
460: if (-e $filename) {
461: $temp_file = Apache::File->new($filename);
462: } else {
463: $temp_file = Apache::File->new('>>'.$filename);
464: }
465: my @due_file_content = <$temp_file>;
466: my $due_file_content = $due_file_content[$#due_file_content];
467: chomp $due_file_content;
468: my $name_of_resourse= &get_resource_name($parstack,$safeeval);
469: if ($due_file_content ne $duedate) {
470: $temp_file = Apache::File->new('>'.$filename);
471: print $temp_file "$duedate\n";
472: if (not $ENV{'request.symb'} =~ m/\.page_/) {
473: if(not $duedate=~m/1969/ and $Apache::lonhomework::type ne 'exam') {
474: $result .= '\begin{document} \typeout{STAMPOFPASSEDRESOURCESTART Resource <h2>"'.$name_of_resourse.'"</h2> located in <br /><small><b>'.$ENV{'request.uri'}.'</b></small><br /> STAMPOFPASSEDRESOURCEEND}\addcontentsline{toc}{subsection}{'.$name_of_resourse.'} \noindent\textit{Due date: '.$duedate.'} \vskip 1 mm\noindent '.$startminipage;
475: } else {
476: $result .= '\begin{document} \typeout{STAMPOFPASSEDRESOURCESTART Resource <h2>"'.$name_of_resourse.'"</h2> located in <br /><small><b>'.$ENV{'request.uri'}.'</b></small><br /> STAMPOFPASSEDRESOURCEEND}\addcontentsline{toc}{subsection}{'.$name_of_resourse.'} \noindent \vskip 1 mm \noindent'.$startminipage;
477: if ($Apache::lonhomework::type eq 'exam' and $allow_print_points==1) { $result .= '\fbox{\textit{'.$weight.' pt}}';}
478: }
479: } else {
480: $result .= '\vskip 1mm\textit{Due date: '.$duedate.'} \\\\\\\\';
481: }
482: } else {
483: if (not $ENV{'request.symb'} =~ m/\.page_/) {
484: $result .= '\begin{document} \typeout{STAMPOFPASSEDRESOURCESTART Resource <h2>"'.$name_of_resourse.'"</h2> located in <br /><small><b>'.$ENV{'request.uri'}.'</b></small><br /> STAMPOFPASSEDRESOURCEEND}\addcontentsline{toc}{subsection}{'.$name_of_resourse.'} \noindent \vskip 1 mm\noindent'.$startminipage;
485: if (($Apache::lonhomework::type eq 'exam') and ($allow_print_points==1)) { $result .= '\fbox{\textit{'.$weight.' pt}}';}
486: } else {
487: $result .= '\vskip 1mm \\\\\\\\';
488: }
489: }
490: }
491: } elsif ($target eq 'edit') {
492: $result.=$head_tag_start."</head>".$body_tag_start.$form_tag_start.
493: &problem_edit_header();
494: my $temp=&Apache::edit::insertlist($target,$token);
495: $result.=$temp;
496: } elsif ($target eq 'modified') {
497: $result=$token->[4];
498: $result.=&Apache::edit::handle_insert();
499: } else {
500: # page_start returned a starting result, delete it if we don't need it
501: $result = '';
502: }
503: return $result;
504: }
505:
506: sub end_problem {
507: my ($target,$token,$tagstack,$parstack,$parser,$safeeval)=@_;
508: my $result='';
509: my $status=$Apache::inputtags::status['-1'];
510: if ($target eq 'grade' || $target eq 'web' || $target eq 'answer' ||
511: $target eq 'tex') {
512: if ( $target eq 'grade' && $Apache::inputtags::part eq '0' &&
513: $status eq 'CAN_ANSWER' ) {
514: # if part is zero, no <part>s existed, so we need to the grading
515: &Apache::inputtags::grade;
516: } elsif ( ($target eq 'web' || $target eq 'tex') &&
517: $Apache::inputtags::part eq '0' &&
518: $status ne 'UNCHECKEDOUT') {
519: # if part is zero, no <part>s existed, so we need show the current
520: # grading status
521: my $gradestatus = &Apache::inputtags::gradestatus($Apache::inputtags::part,$target);
522: $result.= $gradestatus;
523: }
524: if (
525: (($target eq 'web') && ($ENV{'request.state'} ne 'construct')) ||
526: ($target eq 'answer') || ($target eq 'tex')
527: ) {
528: if ($status eq 'CAN_ANSWER') {
529: if ($target ne 'tex' &&
530: $ENV{'form.answer_output_mode'} ne 'tex') {
531: $result.="</form></body>\n";
532: }
533: } elsif ($status eq 'SHOW_ANSWER' || $status eq 'CANNOT_ANSWER' ||
534: $status eq 'UNCHECKEDOUT' ) {
535: if ($target ne 'tex' &&
536: $ENV{'form.answer_output_mode'} ne 'tex') {
537: $result.="</body>\n";
538: }
539: }
540: if ($target eq 'web') {
541: $result.=&Apache::lonxml::xmlend();
542: } elsif ($target eq 'tex') {
543: my $endminipage = '';
544: if (not $ENV{'form.problem_split'}=~/yes/) {
545: $endminipage = '\end{minipage}';
546: }
547: $result .= '\keephidden{ENDOFPROBLEM}\vskip 0.5mm\noindent\makebox[\textwidth/$number_of_columns][b]{\hrulefill}';
548: if (not $ENV{'request.symb'} =~ m/\.page_/) {
549: $result .= $endminipage.'\end{document} ';
550: } else {
551: $result .= '';
552: }
553: }
554: }
555: if ($target eq 'grade') {
556: &Apache::lonhomework::showhash(%Apache::lonhomework::results);
557: &finalize_storage();
558: }
559: if ($target eq 'answer' && ($ENV{'request.state'} eq 'construct')
560: && $ENV{'form.answer_output_mode'} ne 'tex') {
561: $result.='</html>'; # normally we get it from xmlend, but in CSTR
562: # we always show answer mode too.
563: }
564: } elsif ($target eq 'meta') {
565: if ($Apache::inputtags::part eq '0') {
566: @Apache::inputtags::response=();
567: $result=&Apache::response::mandatory_part_meta;
568: }
569: } elsif ($target eq 'edit') {
570: &Apache::lonxml::debug("in end_problem with $target, edit");
571: $result = &problem_edit_footer();
572: }
573:
574: if ($ENV{'request.state'} eq 'construct' && $target eq 'web') {
575: &Apache::inputtags::check_for_duplicate_ids();
576: }
577:
578: &reset_problem_globals('problem');
579:
580: return $result;
581: }
582:
583:
584: sub start_library {
585: my ($target,$token,$tagstack,$parstack,$parser,$safeeval)=@_;
586: my ($result,$head_tag_start,$body_tag_start,$form_tag_start);
587: if ($$tagstack[0] eq 'library') { &init_problem_globals('library') };
588: if ($target eq 'edit') {
589: ($result,$head_tag_start,$body_tag_start,$form_tag_start)=
590: &page_start($target,$token,$tagstack,$parstack,$parser,$safeeval);
591: $result.=$head_tag_start."</head>".$body_tag_start.$form_tag_start.
592: &problem_edit_header();
593: my $temp=&Apache::edit::insertlist($target,$token);
594: $result.=$temp;
595: } elsif ($target eq 'modified') {
596: $result=$token->[4];
597: $result.=&Apache::edit::handle_insert();
598: } elsif ($target eq 'web' && $$tagstack[0] ne 'problem' &&
599: $ENV{'request.state'} eq "construct" ) {
600: ($result,$head_tag_start,$body_tag_start,$form_tag_start)=
601: &page_start($target,$token,$tagstack,$parstack,$parser,$safeeval);
602: my $name=&get_resource_name($parstack,$safeeval);
603: my $rndseed=&setup_rndseed($safeeval);
604: $result.="$head_tag_start<title>$name</title></head>
605: $body_tag_start \n $form_tag_start".
606: '<input type="hidden" name="submitted" value="yes" />';
607: $result.=&problem_web_to_edit_header($rndseed);
608: }
609: return $result;
610: }
611:
612: sub end_library {
613: my ($target,$token,$tagstack,$parstack,$parser,$safeeval)=@_;
614: my $result='';
615: if ($target eq 'edit') {
616: $result=&problem_edit_footer();
617: } elsif ($target eq 'web' && $$tagstack[0] ne 'problem' &&
618: $ENV{'request.state'} eq "construct") {
619: $result.='</form></body>'.&Apache::lonxml::xmlend();
620: }
621: if ($$tagstack[0] eq 'library') { &reset_problem_globals('library') };
622: return $result;
623: }
624:
625: sub start_definetag {
626: my ($target,$token,$tagstack,$parstack,$parser,$safeeval)=@_;
627:
628: my $result;
629:
630: my $name = $token->[2]->{'name'};
631: my $skip=&Apache::lonxml::get_all_text("/definetag",$parser);
632: if ($name=~/^\//) {
633: $result=
634: '<br /><table bgcolor="#FFBBBB"><tr><th>END <tt>'.$name.'</tt></th></tr>';
635: } else {
636: $result=
637: '<br /><table bgcolor="#BBFFBB"><tr><th>BEGIN <tt>'.$name.'</tt></th></tr>';
638: }
639: $skip=~s/\</\<\;/gs;
640: $skip=~s/\>/\>\;/gs;
641: $result.='<tr><td><pre>'.$skip.'</pre></td></tr></table>';
642: return $result;
643: }
644:
645: sub end_definetag {
646: return '';
647: }
648:
649: sub start_block {
650: my ($target,$token,$tagstack,$parstack,$parser,$safeeval,$style)=@_;
651:
652: my $result;
653:
654: if ($target eq 'web' || $target eq 'grade' || $target eq 'answer' ||
655: $target eq 'tex' || $target eq 'analyze') {
656: my $code = $token->[2]->{'condition'};
657: if (defined($code)) {
658: if (!$Apache::lonxml::default_homework_loaded) {
659: &Apache::lonxml::default_homework_load($safeeval);
660: }
661: $result = &Apache::run::run($code,$safeeval);
662: &Apache::lonxml::debug("block :$code: returned :$result:");
663: } else {
664: $result='1';
665: }
666: if ( ! $result ) {
667: my $skip=&Apache::lonxml::get_all_text("/block",$parser,$style);
668: &Apache::lonxml::debug("skipping ahead :$skip: $$parser[-1]");
669: }
670: $result='';
671: } elsif ($target eq 'edit') {
672: $result .=&Apache::edit::tag_start($target,$token);
673: $result .=&Apache::edit::text_arg('Test Condition:','condition',
674: $token,40);
675: $result .=&Apache::edit::end_row().&Apache::edit::start_spanning_row();
676: } elsif ($target eq 'modified') {
677: my $constructtag=&Apache::edit::get_new_args($token,$parstack,
678: $safeeval,'condition');
679: if ($constructtag) { $result = &Apache::edit::rebuild_tag($token); }
680: }
681: return $result;
682: }
683:
684: sub end_block {
685: my ($target,$token,$tagstack,$parstack,$parser,$safeeval)=@_;
686: my $result;
687: if ($target eq "edit") {
688: $result.= &Apache::edit::tag_end($target,$token,'');
689: }
690: return $result;
691: }
692:
693: sub start_languageblock {
694: my ($target,$token,$tagstack,$parstack,$parser,$safeeval,$style)=@_;
695:
696: my $result;
697:
698: if ($target eq 'web' || $target eq 'grade' || $target eq 'answer' ||
699: $target eq 'tex' || $target eq 'analyze') {
700: my $include = $token->[2]->{'include'};
701: my $exclude = $token->[2]->{'exclude'};
702: my %languages=&Apache::loncommon::display_languages();
703: $result='1';
704: if ($include) {
705: $result='';
706: foreach (split(/\,/,$include)) {
707: if ($languages{$_}) { $result='1'; }
708: }
709: }
710: if ($exclude) {
711: foreach (split(/\,/,$exclude)) {
712: if ($languages{$_}) { $result='0'; }
713: }
714: }
715: if ( ! $result ) {
716: my $skip=&Apache::lonxml::get_all_text("/languageblock",$parser,
717: $style);
718: &Apache::lonxml::debug("skipping ahead :$skip: $$parser[-1]");
719: }
720: $result='';
721: } elsif ($target eq 'edit') {
722: $result .=&Apache::edit::tag_start($target,$token);
723: $result .=&Apache::edit::text_arg('Include Language:','include',
724: $token,40);
725: $result .=&Apache::edit::text_arg('Exclude Language:','exclude',
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: $safeeval,'include',
731: 'exclude');
732: if ($constructtag) { $result = &Apache::edit::rebuild_tag($token); }
733: }
734: return $result;
735: }
736:
737: sub end_languageblock {
738: my ($target,$token,$tagstack,$parstack,$parser,$safeeval)=@_;
739: my $result;
740: if ($target eq "edit") {
741: $result.= &Apache::edit::tag_end($target,$token,'');
742: }
743: return $result;
744: }
745:
746: sub start_instructorcomment {
747: my ($target,$token,$tagstack,$parstack,$parser,$safeeval,$style)=@_;
748:
749: my $result;
750:
751: if ($target eq 'web' || $target eq 'grade' || $target eq 'answer' ||
752: $target eq 'tex' || $target eq 'analyze') {
753: $result=($ENV{'request.role'}=~/^(in|cc|au|ca|li)/);
754: if ( ! $result ) {
755: my $skip=&Apache::lonxml::get_all_text("/instructorcomment",
756: $parser,$style);
757: &Apache::lonxml::debug("skipping ahead :$skip: $$parser[-1]");
758: }
759: $result='';
760: } elsif ($target eq 'edit') {
761: $result .=&Apache::edit::tag_start($target,$token);
762: $result .=&Apache::edit::end_row().&Apache::edit::start_spanning_row();
763: }
764: return $result;
765: }
766:
767: sub end_instructorcomment {
768: my ($target,$token,$tagstack,$parstack,$parser,$safeeval)=@_;
769: my $result;
770: if ($target eq "edit") {
771: $result.= &Apache::edit::tag_end($target,$token,'');
772: }
773: return $result;
774: }
775:
776: sub start_while {
777: my ($target,$token,$tagstack,$parstack,$parser,$safeeval)=@_;
778:
779: my $result;
780: if ($target eq 'web' || $target eq 'grade' || $target eq 'answer' ||
781: $target eq 'tex' || $target eq 'analyze') {
782: my $code = $token->[2]->{'condition'};
783:
784: push( @Apache::structuretags::whileconds, $code);
785: if (!$Apache::lonxml::default_homework_loaded) {
786: &Apache::lonxml::default_homework_load($safeeval);
787: }
788: my $result = &Apache::run::run($code,$safeeval);
789: my $bodytext=&Apache::lonxml::get_all_text("/while",$parser);
790: push( @Apache::structuretags::whilebody, $bodytext);
791: push( @Apache::structuretags::whileline, $token->[5]);
792: &Apache::lonxml::debug("s code $code got -$result-");
793: if ( $result ) {
794: &Apache::lonxml::newparser($parser,\$bodytext);
795: }
796: } elsif ($target eq 'edit') {
797: $result .=&Apache::edit::tag_start($target,$token);
798: $result .=&Apache::edit::text_arg('Test Condition:','condition',
799: $token,40);
800: $result .=&Apache::edit::end_row().&Apache::edit::start_spanning_row();
801: } elsif ($target eq 'modified') {
802: my $constructtag=&Apache::edit::get_new_args($token,$parstack,
803: $safeeval,'condition');
804: if ($constructtag) { $result = &Apache::edit::rebuild_tag($token); }
805: }
806: return $result;
807: }
808:
809: sub end_while {
810: my ($target,$token,$tagstack,$parstack,$parser,$safeeval)=@_;
811: my $result;
812:
813: if ($target eq 'web' || $target eq 'grade' || $target eq 'answer' ||
814: $target eq 'tex' || $target eq 'analyze') {
815: my $code = pop(@Apache::structuretags::whileconds);
816: my $bodytext = pop(@Apache::structuretags::whilebody);
817: my $line = pop(@Apache::structuretags::whileline);
818: my $return = &Apache::run::run($code,$safeeval);
819: my $starttime=time;
820: my $error=0;
821: while ($return) {
822: if (time-$starttime >
823: $Apache::lonnet::perlvar{'lonScriptTimeout'}) {
824: $return = 0; $error=1; next;
825: }
826: $result.=&Apache::scripttag::xmlparse($bodytext);
827: $return = &Apache::run::run($code,$safeeval);
828: }
829: if ($error) {
830: &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>');
831: }
832: } elsif ($target eq "edit") {
833: $result.= &Apache::edit::tag_end($target,$token,'');
834: }
835: return $result;
836: }
837:
838: # <randomlist show="1">
839: # <tag1>..</tag1>
840: # <tag2>..</tag2>
841: # <tag3>..</tag3>
842: # ...
843: # </randomlist>
844: sub start_randomlist {
845: my ($target,$token,$tagstack,$parstack,$parser,$safeeval)=@_;
846: my $result;
847: if ($target eq 'answer' || $target eq 'grade' || $target eq 'web' ||
848: $target eq 'tex' || $target eq 'analyze') {
849: my $body= &Apache::lonxml::get_all_text("/randomlist",$parser);
850: my $b_parser= HTML::TokeParser->new(\$body);
851: my $b_tok;
852: my @randomlist;
853: my $list_item;
854: while($b_tok = $b_parser->get_token() ) {
855: if($b_tok->[0] eq 'S') { # start tag
856: # get content of the tag until matching end tag
857: # get all text upto the matching tag
858: # and push the content into @randomlist
859: $list_item = &Apache::lonxml::get_all_text('/'.$b_tok->[1],
860: $b_parser);
861: $list_item = "$b_tok->[4]"."$list_item"."</$b_tok->[1]>";
862: push(@randomlist,$list_item);
863: # print "<br /><b>START-TAG $b_tok->[1], $b_tok->[4],
864: # $list_item</b>";
865: }
866: if($b_tok->[0] eq 'T') { # text
867: # what to do with text in between tags?
868: # print "<b>TEXT $b_tok->[1]</b><br />";
869: }
870: # if($b_tok->[0] eq 'E') { # end tag, should not happen
871: # print "<b>END-TAG $b_tok->[1]</b><br />";
872: # }
873: }
874: my @idx_arr = (0 .. $#randomlist);
875: &Apache::structuretags::shuffle(\@idx_arr);
876: my $bodytext = '';
877: my $show=$#randomlist;
878: my $showarg=&Apache::lonxml::get_param('show',$parstack,$safeeval);
879: $showarg--;
880: if ( ($showarg >= 0) && ($showarg < $show) ) { $show = $showarg; }
881: for(0 .. $show) {
882: $bodytext .= "$randomlist[ $idx_arr[$_] ]";
883: }
884: &Apache::lonxml::newparser($parser,\$bodytext);
885: } elsif ($target eq 'edit' ) {
886: $result .=&Apache::edit::tag_start($target,$token);
887: $result .=&Apache::edit::text_arg('Maximum Tags to Show:','show',
888: $token,5);
889: $result .=&Apache::edit::end_row().&Apache::edit::start_spanning_row();
890: } elsif ($target eq 'modified' ) {
891: my $constructtag=&Apache::edit::get_new_args($token,$parstack,
892: $safeeval,'show');
893: if ($constructtag) { $result = &Apache::edit::rebuild_tag($token); }
894: }
895: return $result;
896: }
897:
898: sub shuffle {
899: my $a=shift;
900: my $i;
901: if (defined(@$a)) {
902: &Apache::response::setrandomnumber();
903: for($i=@$a;--$i;) {
904: my $j=int(&Math::Random::random_uniform() * ($i+1));
905: next if $i == $j;
906: @$a[$i,$j] = @$a[$j,$i];
907: }
908: }
909: }
910:
911: sub end_randomlist {
912: my ($target,$token,$tagstack,$parstack,$parser,$safeeval)=@_;
913: my $result;
914: if ($target eq 'edit' ) {
915: $result=&Apache::edit::tag_end($target,$token,
916: 'End Randomly Parsed Block');
917: }
918: return $result;
919: }
920:
921: sub start_part {
922: my ($target,$token,$tagstack,$parstack,$parser,$safeeval)=@_;
923: my $result='';
924: my $id= &Apache::lonxml::get_param('id',$parstack,$safeeval);
925: if ($id eq '') { $id = $Apache::lonxml::curdepth; }
926: $Apache::inputtags::part=$id;
927: push(@Apache::inputtags::partlist,$id);
928: @Apache::inputtags::response=();
929: @Apache::inputtags::previous=();
930: @Apache::inputtags::previous_version=();
931: $Apache::lonhomework::problemstatus=
932: &Apache::lonnet::EXT("resource.$id.problemstatus");
933: my $hidden=&Apache::loncommon::check_if_partid_hidden($Apache::inputtags::part);
934:
935: if ($target eq 'meta') {
936: return &Apache::response::mandatory_part_meta;
937: } elsif ($target eq 'web' || $target eq 'grade' ||
938: $target eq 'answer' || $target eq 'tex') {
939: if ($hidden) {
940: my $bodytext=&Apache::lonxml::get_all_text("/part",$parser);
941: } else {
942: my ($status,$accessmsg) = &Apache::lonhomework::check_access($id);
943: push (@Apache::inputtags::status,$status);
944: my $expression='$external::datestatus="'.$status.'";';
945: $expression.='$external::gradestatus="'.$Apache::lonhomework::history{"resource.$id.solved"}.'";';
946: &Apache::run::run($expression,$safeeval);
947: if ( $status eq 'CLOSED' ) {
948: my $bodytext=&Apache::lonxml::get_all_text("/part",$parser);
949: if ( $target eq "web" ) {
950: $result="<br />Part is not open to be viewed. It $accessmsg<br />";
951: } elsif ( $target eq 'tex' ) {
952: if (not $ENV{'form.problem_split'}=~/yes/) {
953: $result="\\end{minipage}\\vskip 0 mm Part is not open to be viewed. It $accessmsg \\\\\\begin{minipage}{\\textwidth}";
954: } else {
955: $result="\\vskip 0 mm Part is not open to be viewed. It $accessmsg \\\\";
956: }
957: }
958: } else {
959: if ($target eq 'tex') {
960: if (not $ENV{'form.problem_split'}=~/yes/) {
961: $result.='\noindent \end{minipage}\vskip 0 mm \noindent \begin{minipage}{\textwidth}\noindent';
962: }
963: my $weight = &Apache::lonnet::EXT("resource.$id.weight");
964: if ($Apache::lonhomework::type eq 'exam') { $result .= '\fbox{\textit{'.$weight.' pt}}';}
965: }
966: }
967: }
968: } elsif ($target eq 'edit') {
969: $result.=&Apache::edit::tag_start($target,$token);
970: $result.=&Apache::edit::text_arg('Part ID:','id',$token).
971: &Apache::loncommon::help_open_topic("Part_Tag_Edit_Help").
972: &Apache::edit::end_row().&Apache::edit::start_spanning_row();
973: } elsif ($target eq 'modified') {
974: my $constructtag=&Apache::edit::get_new_args($token,$parstack,
975: $safeeval,'id');
976: if ($constructtag) {
977: $result = &Apache::edit::rebuild_tag($token);
978: $result.=&Apache::edit::handle_insert();
979: }
980: }
981: return $result;
982: }
983:
984: sub end_part {
985: my ($target,$token,$tagstack,$parstack,$parser,$safeeval)=@_;
986: &Apache::lonxml::debug("in end_part $target ");
987: my $status=$Apache::inputtags::status['-1'];
988: my $hidden=&Apache::loncommon::check_if_partid_hidden($Apache::inputtags::part);
989: my $result='';
990: if ( $target eq 'meta' ) {
991: $result='';
992: } elsif ( $target eq 'grade' && $status eq 'CAN_ANSWER' && !$hidden) {
993: $result=&Apache::inputtags::grade;
994: } elsif (($target eq 'web' || $target eq 'tex') && !$hidden ) {
995: my $gradestatus=&Apache::inputtags::gradestatus($Apache::inputtags::part,
996: $target);
997: if ($Apache::lonhomework::type eq 'exam') {$gradestatus='';}
998: $result=$gradestatus;
999: } elsif ($target eq 'edit') {
1000: $result=&Apache::edit::end_table();
1001: }
1002: pop @Apache::inputtags::status;
1003: $Apache::inputtags::part='';
1004: return $result;
1005: }
1006:
1007: sub start_preduedate {
1008: my ($target,$token,$tagstack,$parstack,$parser,$safeeval)=@_;
1009: if ($target eq 'web' || $target eq 'grade' || $target eq 'answer' || $target eq 'tex') {
1010: if ($Apache::inputtags::status['-1'] ne 'CAN_ANSWER' &&
1011: $Apache::inputtags::status['-1'] ne 'CANNOT_ANSWER' &&
1012: $Apache::inputtags::status['-1'] ne 'SHOW_ANSWER') {
1013: &Apache::lonxml::get_all_text("/preduedate",$parser);
1014: }
1015: }
1016: return '';
1017: }
1018:
1019: sub end_preduedate {
1020: return '';
1021: }
1022:
1023: sub start_postanswerdate {
1024: my ($target,$token,$tagstack,$parstack,$parser,$safeeval)=@_;
1025: if ($target eq 'web' || $target eq 'grade' || $target eq 'tex') {
1026: if ($Apache::inputtags::status['-1'] ne 'SHOW_ANSWER') {
1027: &Apache::lonxml::get_all_text("/postanswerdate",$parser);
1028: }
1029: } elsif ($target eq 'tex') {
1030: return '\vskip 0 mm \noindent';
1031: }
1032: return '';
1033: }
1034:
1035: sub end_postanswerdate {
1036: return '';
1037: }
1038:
1039: sub start_notsolved {
1040: my ($target,$token,$tagstack,$parstack,$parser,$safeeval)=@_;
1041: if ($target eq 'web' || $target eq 'grade' || $target eq 'answer' ||
1042: $target eq 'tex') {
1043: my $gradestatus=$Apache::lonhomework::history{"resource.$Apache::inputtags::part.solved"};
1044: &Apache::lonxml::debug("not solved has :$gradestatus:");
1045: if ($gradestatus =~ /^correct/) {
1046: &Apache::lonxml::debug("skipping");
1047: &Apache::lonxml::get_all_text("/notsolved",$parser);
1048: }
1049: }
1050: return '';
1051: }
1052:
1053: sub end_notsolved {
1054: return '';
1055: }
1056:
1057: sub start_solved {
1058: my ($target,$token,$tagstack,$parstack,$parser,$safeeval)=@_;
1059: if ($target eq 'web' || $target eq 'grade' || $target eq 'answer' ||
1060: $target eq 'tex') {
1061: my $gradestatus=$Apache::lonhomework::history{"resource.$Apache::inputtags::part.solved"};
1062: if ($gradestatus !~ /^correct/) {
1063: &Apache::lonxml::get_all_text("/solved",$parser);
1064: }
1065: }
1066: return '';
1067: }
1068:
1069: sub end_solved {
1070: return '';
1071: }
1072:
1073: sub start_startouttext {
1074: my ($target,$token,$tagstack,$parstack,$parser,$safeeval)=@_;
1075: my @result=(''.'');
1076: if ($target eq 'edit' || $target eq 'modified' ) { @result=('','no'); }
1077: return (@result);
1078: }
1079:
1080: sub end_startouttext {
1081: my ($target,$token,$tagstack,$parstack,$parser,$safeeval)=@_;
1082: my $result='';
1083: my $text='';
1084:
1085: if ($target eq 'edit') {
1086: $text=&Apache::lonxml::get_all_text("endouttext",$parser);
1087: $result.=&Apache::edit::start_table($token)."<tr><td>Text Block</td>
1088: <td>Delete:".
1089: &Apache::edit::deletelist($target,$token)
1090: ."</td>
1091: <td>".
1092: &Apache::edit::insertlist($target,$token).
1093: &Apache::edit::end_row().
1094: &Apache::edit::start_spanning_row()."\n"
1095: . &Apache::loncommon::helpLatexCheatsheet () .
1096: &Apache::edit::editfield($token->[1],$text,"",80,4);
1097: }
1098: if ($target eq 'modified') {
1099: $text=&Apache::lonxml::get_all_text("endouttext",$parser);
1100: $result='<startouttext />'.&Apache::edit::modifiedfield();
1101: }
1102: if ($target eq 'tex') {
1103: $result .= '\noindent ';
1104: }
1105: return $result;
1106: }
1107:
1108: sub start_endouttext {
1109: my ($target,$token,$tagstack,$parstack,$parser,$safeeval)=@_;
1110: my $result='';
1111: if ($target eq "edit" ) { $result="</td></tr>".&Apache::edit::end_table()."\n"; }
1112: if ($target eq "modified") {
1113: $result='<endouttext />'.
1114: &Apache::edit::handle_insertafter('startouttext'); }
1115: return $result;
1116: }
1117:
1118: sub end_endouttext {
1119: my ($target,$token,$tagstack,$parstack,$parser,$safeeval)=@_;
1120: my @result=('','');
1121: if ($target eq "edit" || $target eq 'modified') { @result=('','no'); }
1122: return (@result);
1123: }
1124:
1125: sub delete_startouttext {
1126: my ($target,$token,$tagstack,$parstack,$parser,$safeeval)=@_;
1127: # my $text=&Apache::lonxml::get_all_text("endouttext",$parser);
1128: my $text=$$parser['-1']->get_text("/endouttext");
1129: my $ntoken=$$parser['-1']->get_token();
1130: &Apache::lonxml::debug("Deleting :$text: and :$ntoken->[0]:$ntoken->[1]:$ntoken->[2]: for startouttext");
1131: &Apache::lonxml::end_tag($tagstack,$parstack,$ntoken);
1132: # Deleting 2 parallel tag pairs, but we need the numbers later to look like
1133: # they did the last time round
1134: &Apache::lonxml::increasedepth($ntoken);
1135: &Apache::lonxml::decreasedepth($ntoken);
1136: return 1;
1137: }
1138:
1139: sub start_simpleeditbutton {
1140: my ($target,$token,$tagstack,$parstack,$parser,$safeeval)=@_;
1141: my $result='';
1142: if (($target eq 'web') &&
1143: (&Apache::lonnet::allowed('srm',$ENV{'request.course.id'}))) {
1144: my $url=$ENV{'REQUEST_URI'};
1145: $url=~s/\?.*$//;
1146: $result='<table width="100%" bgcolor="#FFFFAA" border="2"><tr><td>'.
1147: '<a href="'.$url.'/smpedit">Simple Problem Editor</a> - Note: it can take up to 10 minutes for changes to take effect for all users.'.
1148: &Apache::loncommon::help_open_topic('Caching').'</td></tr></table><br />';
1149: }
1150: return $result;
1151: }
1152:
1153: sub end_simpleeditbutton {
1154: return '';
1155: }
1156:
1157: 1;
1158: __END__
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