1: # The LearningOnline Network with CAPA
2: # definition of tags that give a structure to a document
3: #
4: # $Id: structuretags.pm,v 1.208 2003/09/05 02:31:49 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: #don't undef this, lonhomework.pm takes care of this, we use this to
310: #detect if we try to do 2 problems in one file
311: # undef($Apache::lonhomework::parsing_a_problem);
312: undef($Apache::lonhomework::name);
313: }
314:
315: sub start_problem {
316: my ($target,$token,$tagstack,$parstack,$parser,$safeeval)=@_;
317:
318: if ( $Apache::inputtags::part ne '' ||
319: $Apache::lonhomework::parsing_a_problem) {
320: &Apache::lonxml::error('Only one <problem> allowed in a .problem file');
321: #my $bodytext=&Apache::lonxml::get_all_text("/problem",$parser);
322: return '';
323: }
324:
325: $Apache::lonhomework::parsing_a_problem=1;
326: &init_problem_globals('problem');
327:
328: if (defined($ENV{'scantron.maxquest'})) {
329: $Apache::lonhomework::scantronmode=1;
330: }
331:
332: if ($target ne 'analyze') {
333: &initialize_storage();
334: if ($target eq 'web') {
335: &Apache::lonhomework::showhash(%Apache::lonhomework::history);
336: }
337: $Apache::lonhomework::type=&Apache::lonnet::EXT('resource.0.type');
338: &Apache::lonxml::debug("Found this to be of type :$Apache::lonhomework::type:");
339: }
340: if ($Apache::lonhomework::type eq '' ) {
341: my $uri=$ENV{'request.uri'};
342: if ($uri=~/\.(\w+)$/) {
343: $Apache::lonhomework::type=$1;
344: &Apache::lonxml::debug("Using type of $1");
345: } else {
346: $Apache::lonhomework::type='problem';
347: &Apache::lonxml::debug("Using default type, problem, :$uri:");
348: }
349: }
350:
351: #added vars to the scripting enviroment
352: my $expression='$external::part='.$Apache::inputtags::part.';';
353: &Apache::run::run($expression,$safeeval);
354: my $status;
355: my $accessmsg;
356:
357: #should get back a <html> or the neccesary stuff to start XML/MathML
358: my ($result,$head_tag_start,$body_tag_start,$form_tag_start)=
359: &page_start($target,$token,$tagstack,$parstack,$parser,$safeeval);
360: if ($target eq 'tex' and $ENV{'request.symb'} =~ m/\.page_/) {$result='';}
361:
362: if ($target eq 'analyze') { my $rndseed=&setup_rndseed($safeeval); }
363: if ($target eq 'web' || $target eq 'grade' || $target eq 'answer' ||
364: $target eq 'tex') {
365: #handle exam checkout
366: if ($Apache::lonhomework::type eq 'exam') {
367: my $token=
368: $Apache::lonhomework::history{"resource.0.outtoken"};
369: if (($ENV{'form.doescheckout'}) && (!$token)) {
370: $token=&Apache::lonxml::maketoken();
371: $Apache::lonhomework::history{"resource.0.outtoken"}=
372: $token;
373: }
374: $body_tag_start.=&Apache::lonxml::printtokenheader($target,$token);
375: }
376:
377: #handle rand seed in construction space
378: my $rndseed=&setup_rndseed($safeeval);
379: my ($symb)=&Apache::lonxml::whichuser();
380: if ($ENV{'request.state'} ne "construct" && $symb eq '') {
381: $form_tag_start.='<input type="hidden" name="rndseed" value="'.
382: $rndseed.'" />'.
383: '<input type="submit" name="resetdata"
384: value="New Problem Variation" />'.
385: '<input type="hidden" name="username"
386: value="'.$ENV{'form.username'}.'" /> <br />';
387: }
388: ($status,$accessmsg) = &Apache::lonhomework::check_access('0');
389: push (@Apache::inputtags::status,$status);
390: my $expression='$external::datestatus="'.$status.'";';
391: $expression.='$external::gradestatus="'.$Apache::lonhomework::history{"resource.0.solved"}.'";';
392: &Apache::run::run($expression,$safeeval);
393: &Apache::lonxml::debug("Got $status");
394: if (( $status eq 'CLOSED' ) ||
395: ( $status eq 'UNCHECKEDOUT') ||
396: ( $status eq 'BANNED') ||
397: ( $status eq 'UNAVAILABLE')) {
398: my $bodytext=&Apache::lonxml::get_all_text("/problem",$parser);
399: if ( $target eq "web" ) {
400: $result.= $head_tag_start.'</head>';
401: my $msg=$body_tag_start;
402: if ($status eq 'UNAVAILABLE') {
403: $result.='<h1>Unable to determine if this resource is open due to network problems. Please try again later.</h1>';
404: } else {
405: $result.='<h1>Not open to be viewed</h1>';
406: }
407: if ($status eq 'CLOSED') {
408: $msg.='The problem '.$accessmsg;
409: } elsif ($status eq 'UNCHECKEDOUT') {
410: $msg.=&checkout_msg;
411: }
412: $result.=$msg.'<br />';
413: } elsif ($target eq 'tex') {
414: $result.='\begin{document}\noindent \vskip 1 mm \begin{minipage}{\textwidth}\vskip 0 mm';
415: if ($status eq 'UNAVAILABLE') {
416: $result.='Unable to determine if this resource is open due to network problems. Please try again later.\vskip 0 mm ';
417: } else {
418: $result.="Problem is not open to be viewed. It $accessmsg \\vskip 0 mm ";
419: }
420: }
421: } elsif ($target eq 'web') {
422: my $name= &get_resource_name($parstack,$safeeval);
423: if ($status eq 'CAN_ANSWER') {
424: # create a page header and exit
425: $result.="$head_tag_start<title>$name</title></head>
426: $body_tag_start \n $form_tag_start".
427: '<input type="hidden" name="submitted" value="yes" />';
428: if ($ENV{'request.state'} eq "construct") {
429: $result.= &problem_web_to_edit_header($ENV{'form.rndseed'});
430: }
431: # if we are viewing someone else preserve that info
432: if (defined $ENV{'form.grade_symb'}) {
433: foreach my $field ('symb','courseid','domain','username') {
434: $result .= '<input type="hidden" name="grade_'.$field.
435: '" value="'.$ENV{"form.grade_$field"}.'" />'."\n";
436: }
437: }
438: } elsif ($status eq 'SHOW_ANSWER' || $status eq 'CANNOT_ANSWER'
439: || $status eq 'CLOSED' || $status eq 'UNAVALAILABLE') {
440: $result.=$head_tag_start.
441: "<title>$name</title></head>\n$body_tag_start\n";
442: }
443: } elsif ($target eq 'tex') {
444: my $startminipage = '';
445: if (not $ENV{'form.problem_split'}=~/yes/) {
446: $startminipage = '\begin{minipage}{\textwidth}';
447: }
448: my $id = $Apache::inputtags::part;
449: my $weight = &Apache::lonnet::EXT("resource.$id.weight");
450: my $allkeys=&Apache::lonnet::metadata($ENV{'request.uri'},'keys');
451: my @allkeys = split /,/,$allkeys;
452: my $allow_print_points = 0;
453: foreach my $partial_key (@allkeys) {
454: if ($partial_key=~m/weight/) {
455: $allow_print_points++;
456: }
457: }
458: my $duedate = &Apache::lonnet::EXT("resource.$id.duedate");
459: $duedate = POSIX::strftime("%c",localtime($duedate));
460: my $temp_file;
461: my $filename = "/home/httpd/prtspool/$ENV{'user.name'}_$ENV{'user.domain'}_printout.due";
462: if (-e $filename) {
463: $temp_file = Apache::File->new($filename);
464: } else {
465: $temp_file = Apache::File->new('>>'.$filename);
466: }
467: my @due_file_content = <$temp_file>;
468: my $due_file_content = $due_file_content[$#due_file_content];
469: chomp $due_file_content;
470: my $name_of_resourse= &get_resource_name($parstack,$safeeval);
471: if ($due_file_content ne $duedate) {
472: $temp_file = Apache::File->new('>'.$filename);
473: print $temp_file "$duedate\n";
474: if (not $ENV{'request.symb'} =~ m/\.page_/) {
475: if(not $duedate=~m/1969/ and $Apache::lonhomework::type ne 'exam') {
476: $result .= '\begin{document} \typeout{STAMPOFPASSEDRESOURCESTART Resource <h2>"'.$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 '.$startminipage.'\addcontentsline{toc}{subsection}{'.$name_of_resourse.'}';
477: } else {
478: $result .= '\begin{document} \typeout{STAMPOFPASSEDRESOURCESTART Resource <h2>"'.$name_of_resourse.'"</h2> located in <br /><small><b>'.$ENV{'request.uri'}.'</b></small><br /> STAMPOFPASSEDRESOURCEEND} \noindent \vskip 1 mm \noindent'.$startminipage.'\addcontentsline{toc}{subsection}{'.$name_of_resourse.'}';
479: if ($Apache::lonhomework::type eq 'exam' and $allow_print_points==1) { $result .= '\fbox{\textit{'.$weight.' pt}}';}
480: }
481: } else {
482: $result .= '\vskip 1mm\textit{Due date: '.$duedate.'} \\\\\\\\';
483: }
484: } else {
485: if (not $ENV{'request.symb'} =~ m/\.page_/) {
486: $result .= '\begin{document} \typeout{STAMPOFPASSEDRESOURCESTART Resource <h2>"'.$name_of_resourse.'"</h2> located in <br /><small><b>'.$ENV{'request.uri'}.'</b></small><br /> STAMPOFPASSEDRESOURCEEND} \noindent \vskip 1 mm\noindent'.$startminipage.'\addcontentsline{toc}{subsection}{'.$name_of_resourse.'}';
487: if (($Apache::lonhomework::type eq 'exam') and ($allow_print_points==1)) { $result .= '\fbox{\textit{'.$weight.' pt}}';}
488: } else {
489: $result .= '\vskip 1mm \\\\\\\\';
490: }
491: }
492: }
493: } elsif ($target eq 'edit') {
494: $result.=$head_tag_start."</head>".$body_tag_start.$form_tag_start.
495: &problem_edit_header();
496: my $temp=&Apache::edit::insertlist($target,$token);
497: $result.=$temp;
498: } elsif ($target eq 'modified') {
499: $result=$token->[4];
500: $result.=&Apache::edit::handle_insert();
501: } else {
502: # page_start returned a starting result, delete it if we don't need it
503: $result = '';
504: }
505: return $result;
506: }
507:
508: sub end_problem {
509: my ($target,$token,$tagstack,$parstack,$parser,$safeeval)=@_;
510: my $result='';
511: my $status=$Apache::inputtags::status['-1'];
512: if ($target eq 'grade' || $target eq 'web' || $target eq 'answer' ||
513: $target eq 'tex') {
514: if ( $target eq 'grade' && $Apache::inputtags::part eq '0' &&
515: $status eq 'CAN_ANSWER' ) {
516: # if part is zero, no <part>s existed, so we need to the grading
517: &Apache::inputtags::grade;
518: } elsif ( ($target eq 'web' || $target eq 'tex') &&
519: $Apache::inputtags::part eq '0' &&
520: $status ne 'UNCHECKEDOUT') {
521: # if part is zero, no <part>s existed, so we need show the current
522: # grading status
523: my $gradestatus = &Apache::inputtags::gradestatus($Apache::inputtags::part,$target);
524: $result.= $gradestatus;
525: }
526: if (
527: (($target eq 'web') && ($ENV{'request.state'} ne 'construct')) ||
528: ($target eq 'answer') || ($target eq 'tex')
529: ) {
530: if ($status eq 'CAN_ANSWER') {
531: if ($target ne 'tex' &&
532: $ENV{'form.answer_output_mode'} ne 'tex') {
533: $result.="</form></body>\n";
534: }
535: } elsif ($status eq 'SHOW_ANSWER' || $status eq 'CANNOT_ANSWER' ||
536: $status eq 'UNCHECKEDOUT' ) {
537: if ($target ne 'tex' &&
538: $ENV{'form.answer_output_mode'} ne 'tex') {
539: $result.="</body>\n";
540: }
541: }
542: if ($target eq 'web') {
543: $result.=&Apache::lonxml::xmlend();
544: } elsif ($target eq 'tex') {
545: my $endminipage = '';
546: if (not $ENV{'form.problem_split'}=~/yes/) {
547: $endminipage = '\end{minipage}';
548: }
549: $result .= '\keephidden{ENDOFPROBLEM}\vskip 0.5mm\noindent\makebox[\textwidth/$number_of_columns][b]{\hrulefill}';
550: if (not $ENV{'request.symb'} =~ m/\.page_/) {
551: $result .= $endminipage.'\end{document} ';
552: } else {
553: $result .= '';
554: }
555: }
556: }
557: if ($target eq 'grade') {
558: &Apache::lonhomework::showhash(%Apache::lonhomework::results);
559: &finalize_storage();
560: }
561: if ($target eq 'answer' && ($ENV{'request.state'} eq 'construct')
562: && $ENV{'form.answer_output_mode'} ne 'tex') {
563: $result.='</html>'; # normally we get it from xmlend, but in CSTR
564: # we always show answer mode too.
565: }
566: } elsif ($target eq 'meta') {
567: if ($Apache::inputtags::part eq '0') {
568: @Apache::inputtags::response=();
569: $result=&Apache::response::mandatory_part_meta;
570: }
571: } elsif ($target eq 'edit') {
572: &Apache::lonxml::debug("in end_problem with $target, edit");
573: $result = &problem_edit_footer();
574: }
575:
576: if ($ENV{'request.state'} eq 'construct' && $target eq 'web') {
577: &Apache::inputtags::check_for_duplicate_ids();
578: }
579:
580: &reset_problem_globals('problem');
581:
582: return $result;
583: }
584:
585:
586: sub start_library {
587: my ($target,$token,$tagstack,$parstack,$parser,$safeeval)=@_;
588: my ($result,$head_tag_start,$body_tag_start,$form_tag_start);
589: if ($$tagstack[0] eq 'library') { &init_problem_globals('library') };
590: if ($target eq 'edit') {
591: ($result,$head_tag_start,$body_tag_start,$form_tag_start)=
592: &page_start($target,$token,$tagstack,$parstack,$parser,$safeeval);
593: $result.=$head_tag_start."</head>".$body_tag_start.$form_tag_start.
594: &problem_edit_header();
595: my $temp=&Apache::edit::insertlist($target,$token);
596: $result.=$temp;
597: } elsif ($target eq 'modified') {
598: $result=$token->[4];
599: $result.=&Apache::edit::handle_insert();
600: } elsif ($target eq 'web' && $$tagstack[0] ne 'problem' &&
601: $ENV{'request.state'} eq "construct" ) {
602: ($result,$head_tag_start,$body_tag_start,$form_tag_start)=
603: &page_start($target,$token,$tagstack,$parstack,$parser,$safeeval);
604: my $name=&get_resource_name($parstack,$safeeval);
605: my $rndseed=&setup_rndseed($safeeval);
606: $result.="$head_tag_start<title>$name</title></head>
607: $body_tag_start \n $form_tag_start".
608: '<input type="hidden" name="submitted" value="yes" />';
609: $result.=&problem_web_to_edit_header($rndseed);
610: }
611: return $result;
612: }
613:
614: sub end_library {
615: my ($target,$token,$tagstack,$parstack,$parser,$safeeval)=@_;
616: my $result='';
617: if ($target eq 'edit') {
618: $result=&problem_edit_footer();
619: } elsif ($target eq 'web' && $$tagstack[0] ne 'problem' &&
620: $ENV{'request.state'} eq "construct") {
621: $result.='</form></body>'.&Apache::lonxml::xmlend();
622: }
623: if ($$tagstack[0] eq 'library') { &reset_problem_globals('library') };
624: return $result;
625: }
626:
627: sub start_definetag {
628: my ($target,$token,$tagstack,$parstack,$parser,$safeeval)=@_;
629:
630: my $result;
631:
632: my $name = $token->[2]->{'name'};
633: my $skip=&Apache::lonxml::get_all_text("/definetag",$parser);
634: if ($name=~/^\//) {
635: $result=
636: '<br /><table bgcolor="#FFBBBB"><tr><th>END <tt>'.$name.'</tt></th></tr>';
637: } else {
638: $result=
639: '<br /><table bgcolor="#BBFFBB"><tr><th>BEGIN <tt>'.$name.'</tt></th></tr>';
640: }
641: $skip=~s/\</\<\;/gs;
642: $skip=~s/\>/\>\;/gs;
643: $result.='<tr><td><pre>'.$skip.'</pre></td></tr></table>';
644: return $result;
645: }
646:
647: sub end_definetag {
648: return '';
649: }
650:
651: sub start_block {
652: my ($target,$token,$tagstack,$parstack,$parser,$safeeval,$style)=@_;
653:
654: my $result;
655:
656: if ($target eq 'web' || $target eq 'grade' || $target eq 'answer' ||
657: $target eq 'tex' || $target eq 'analyze') {
658: my $code = $token->[2]->{'condition'};
659: if (defined($code)) {
660: if (!$Apache::lonxml::default_homework_loaded) {
661: &Apache::lonxml::default_homework_load($safeeval);
662: }
663: $result = &Apache::run::run($code,$safeeval);
664: &Apache::lonxml::debug("block :$code: returned :$result:");
665: } else {
666: $result='1';
667: }
668: if ( ! $result ) {
669: my $skip=&Apache::lonxml::get_all_text("/block",$parser,$style);
670: &Apache::lonxml::debug("skipping ahead :$skip: $$parser[-1]");
671: }
672: $result='';
673: } elsif ($target eq 'edit') {
674: $result .=&Apache::edit::tag_start($target,$token);
675: $result .=&Apache::edit::text_arg('Test Condition:','condition',
676: $token,40);
677: $result .=&Apache::edit::end_row().&Apache::edit::start_spanning_row();
678: } elsif ($target eq 'modified') {
679: my $constructtag=&Apache::edit::get_new_args($token,$parstack,
680: $safeeval,'condition');
681: if ($constructtag) { $result = &Apache::edit::rebuild_tag($token); }
682: }
683: return $result;
684: }
685:
686: sub end_block {
687: my ($target,$token,$tagstack,$parstack,$parser,$safeeval)=@_;
688: my $result;
689: if ($target eq "edit") {
690: $result.= &Apache::edit::tag_end($target,$token,'');
691: }
692: return $result;
693: }
694:
695: sub start_languageblock {
696: my ($target,$token,$tagstack,$parstack,$parser,$safeeval,$style)=@_;
697:
698: my $result;
699:
700: if ($target eq 'web' || $target eq 'grade' || $target eq 'answer' ||
701: $target eq 'tex' || $target eq 'analyze') {
702: my $include = $token->[2]->{'include'};
703: my $exclude = $token->[2]->{'exclude'};
704: my %languages=&Apache::loncommon::display_languages();
705: $result='1';
706: if ($include) {
707: $result='';
708: foreach (split(/\,/,$include)) {
709: if ($languages{$_}) { $result='1'; }
710: }
711: }
712: if ($exclude) {
713: foreach (split(/\,/,$exclude)) {
714: if ($languages{$_}) { $result='0'; }
715: }
716: }
717: if ( ! $result ) {
718: my $skip=&Apache::lonxml::get_all_text("/languageblock",$parser,
719: $style);
720: &Apache::lonxml::debug("skipping ahead :$skip: $$parser[-1]");
721: }
722: $result='';
723: } elsif ($target eq 'edit') {
724: $result .=&Apache::edit::tag_start($target,$token);
725: $result .=&Apache::edit::text_arg('Include Language:','include',
726: $token,40);
727: $result .=&Apache::edit::text_arg('Exclude Language:','exclude',
728: $token,40);
729: $result .=&Apache::edit::end_row().&Apache::edit::start_spanning_row();
730: } elsif ($target eq 'modified') {
731: my $constructtag=&Apache::edit::get_new_args($token,$parstack,
732: $safeeval,'include',
733: 'exclude');
734: if ($constructtag) { $result = &Apache::edit::rebuild_tag($token); }
735: }
736: return $result;
737: }
738:
739: sub end_languageblock {
740: my ($target,$token,$tagstack,$parstack,$parser,$safeeval)=@_;
741: my $result;
742: if ($target eq "edit") {
743: $result.= &Apache::edit::tag_end($target,$token,'');
744: }
745: return $result;
746: }
747:
748: sub start_instructorcomment {
749: my ($target,$token,$tagstack,$parstack,$parser,$safeeval,$style)=@_;
750:
751: my $result;
752:
753: if ($target eq 'web' || $target eq 'grade' || $target eq 'answer' ||
754: $target eq 'tex' || $target eq 'analyze') {
755: $result=($ENV{'request.role'}=~/^(in|cc|au|ca|li)/);
756: if ( ! $result ) {
757: my $skip=&Apache::lonxml::get_all_text("/instructorcomment",
758: $parser,$style);
759: &Apache::lonxml::debug("skipping ahead :$skip: $$parser[-1]");
760: }
761: $result='';
762: } elsif ($target eq 'edit') {
763: $result .=&Apache::edit::tag_start($target,$token);
764: $result .=&Apache::edit::end_row().&Apache::edit::start_spanning_row();
765: }
766: return $result;
767: }
768:
769: sub end_instructorcomment {
770: my ($target,$token,$tagstack,$parstack,$parser,$safeeval)=@_;
771: my $result;
772: if ($target eq "edit") {
773: $result.= &Apache::edit::tag_end($target,$token,'');
774: }
775: return $result;
776: }
777:
778: sub start_while {
779: my ($target,$token,$tagstack,$parstack,$parser,$safeeval)=@_;
780:
781: my $result;
782: if ($target eq 'web' || $target eq 'grade' || $target eq 'answer' ||
783: $target eq 'tex' || $target eq 'analyze') {
784: my $code = $token->[2]->{'condition'};
785:
786: push( @Apache::structuretags::whileconds, $code);
787: if (!$Apache::lonxml::default_homework_loaded) {
788: &Apache::lonxml::default_homework_load($safeeval);
789: }
790: my $result = &Apache::run::run($code,$safeeval);
791: my $bodytext=&Apache::lonxml::get_all_text("/while",$parser);
792: push( @Apache::structuretags::whilebody, $bodytext);
793: push( @Apache::structuretags::whileline, $token->[5]);
794: &Apache::lonxml::debug("s code $code got -$result-");
795: if ( $result ) {
796: &Apache::lonxml::newparser($parser,\$bodytext);
797: }
798: } elsif ($target eq 'edit') {
799: $result .=&Apache::edit::tag_start($target,$token);
800: $result .=&Apache::edit::text_arg('Test Condition:','condition',
801: $token,40);
802: $result .=&Apache::edit::end_row().&Apache::edit::start_spanning_row();
803: } elsif ($target eq 'modified') {
804: my $constructtag=&Apache::edit::get_new_args($token,$parstack,
805: $safeeval,'condition');
806: if ($constructtag) { $result = &Apache::edit::rebuild_tag($token); }
807: }
808: return $result;
809: }
810:
811: sub end_while {
812: my ($target,$token,$tagstack,$parstack,$parser,$safeeval)=@_;
813: my $result;
814:
815: if ($target eq 'web' || $target eq 'grade' || $target eq 'answer' ||
816: $target eq 'tex' || $target eq 'analyze') {
817: my $code = pop(@Apache::structuretags::whileconds);
818: my $bodytext = pop(@Apache::structuretags::whilebody);
819: my $line = pop(@Apache::structuretags::whileline);
820: my $return = &Apache::run::run($code,$safeeval);
821: my $starttime=time;
822: my $error=0;
823: while ($return) {
824: if (time-$starttime >
825: $Apache::lonnet::perlvar{'lonScriptTimeout'}) {
826: $return = 0; $error=1; next;
827: }
828: $result.=&Apache::scripttag::xmlparse($bodytext);
829: $return = &Apache::run::run($code,$safeeval);
830: }
831: if ($error) {
832: &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>');
833: }
834: } elsif ($target eq "edit") {
835: $result.= &Apache::edit::tag_end($target,$token,'');
836: }
837: return $result;
838: }
839:
840: # <randomlist show="1">
841: # <tag1>..</tag1>
842: # <tag2>..</tag2>
843: # <tag3>..</tag3>
844: # ...
845: # </randomlist>
846: sub start_randomlist {
847: my ($target,$token,$tagstack,$parstack,$parser,$safeeval)=@_;
848: my $result;
849: if ($target eq 'answer' || $target eq 'grade' || $target eq 'web' ||
850: $target eq 'tex' || $target eq 'analyze') {
851: my $body= &Apache::lonxml::get_all_text("/randomlist",$parser);
852: my $b_parser= HTML::TokeParser->new(\$body);
853: my $b_tok;
854: my @randomlist;
855: my $list_item;
856: while($b_tok = $b_parser->get_token() ) {
857: if($b_tok->[0] eq 'S') { # start tag
858: # get content of the tag until matching end tag
859: # get all text upto the matching tag
860: # and push the content into @randomlist
861: $list_item = &Apache::lonxml::get_all_text('/'.$b_tok->[1],
862: $b_parser);
863: $list_item = "$b_tok->[4]"."$list_item"."</$b_tok->[1]>";
864: push(@randomlist,$list_item);
865: # print "<br /><b>START-TAG $b_tok->[1], $b_tok->[4],
866: # $list_item</b>";
867: }
868: if($b_tok->[0] eq 'T') { # text
869: # what to do with text in between tags?
870: # print "<b>TEXT $b_tok->[1]</b><br />";
871: }
872: # if($b_tok->[0] eq 'E') { # end tag, should not happen
873: # print "<b>END-TAG $b_tok->[1]</b><br />";
874: # }
875: }
876: my @idx_arr = (0 .. $#randomlist);
877: &Apache::structuretags::shuffle(\@idx_arr);
878: my $bodytext = '';
879: my $show=$#randomlist;
880: my $showarg=&Apache::lonxml::get_param('show',$parstack,$safeeval);
881: $showarg--;
882: if ( ($showarg >= 0) && ($showarg < $show) ) { $show = $showarg; }
883: for(0 .. $show) {
884: $bodytext .= "$randomlist[ $idx_arr[$_] ]";
885: }
886: &Apache::lonxml::newparser($parser,\$bodytext);
887: } elsif ($target eq 'edit' ) {
888: $result .=&Apache::edit::tag_start($target,$token);
889: $result .=&Apache::edit::text_arg('Maximum Tags to Show:','show',
890: $token,5);
891: $result .=&Apache::edit::end_row().&Apache::edit::start_spanning_row();
892: } elsif ($target eq 'modified' ) {
893: my $constructtag=&Apache::edit::get_new_args($token,$parstack,
894: $safeeval,'show');
895: if ($constructtag) { $result = &Apache::edit::rebuild_tag($token); }
896: }
897: return $result;
898: }
899:
900: sub shuffle {
901: my $a=shift;
902: my $i;
903: if (defined(@$a)) {
904: &Apache::response::setrandomnumber();
905: for($i=@$a;--$i;) {
906: my $j=int(&Math::Random::random_uniform() * ($i+1));
907: next if $i == $j;
908: @$a[$i,$j] = @$a[$j,$i];
909: }
910: }
911: }
912:
913: sub end_randomlist {
914: my ($target,$token,$tagstack,$parstack,$parser,$safeeval)=@_;
915: my $result;
916: if ($target eq 'edit' ) {
917: $result=&Apache::edit::tag_end($target,$token,
918: 'End Randomly Parsed Block');
919: }
920: return $result;
921: }
922:
923: sub start_part {
924: my ($target,$token,$tagstack,$parstack,$parser,$safeeval)=@_;
925: my $result='';
926: my $id= &Apache::lonxml::get_param('id',$parstack,$safeeval);
927: if ($id eq '') { $id = $Apache::lonxml::curdepth; }
928: $Apache::inputtags::part=$id;
929: push(@Apache::inputtags::partlist,$id);
930: @Apache::inputtags::response=();
931: @Apache::inputtags::previous=();
932: @Apache::inputtags::previous_version=();
933: $Apache::lonhomework::problemstatus=
934: &Apache::lonnet::EXT("resource.$id.problemstatus");
935: my $hidden=&Apache::loncommon::check_if_partid_hidden($Apache::inputtags::part);
936:
937: if ($target eq 'meta') {
938: return &Apache::response::mandatory_part_meta;
939: } elsif ($target eq 'web' || $target eq 'grade' ||
940: $target eq 'answer' || $target eq 'tex') {
941: if ($hidden) {
942: my $bodytext=&Apache::lonxml::get_all_text("/part",$parser);
943: } else {
944: my ($status,$accessmsg) = &Apache::lonhomework::check_access($id);
945: push (@Apache::inputtags::status,$status);
946: my $expression='$external::datestatus="'.$status.'";';
947: $expression.='$external::gradestatus="'.$Apache::lonhomework::history{"resource.$id.solved"}.'";';
948: &Apache::run::run($expression,$safeeval);
949: if ( $status eq 'CLOSED' ) {
950: my $bodytext=&Apache::lonxml::get_all_text("/part",$parser);
951: if ( $target eq "web" ) {
952: $result="<br />Part is not open to be viewed. It $accessmsg<br />";
953: } elsif ( $target eq 'tex' ) {
954: if (not $ENV{'form.problem_split'}=~/yes/) {
955: $result="\\end{minipage}\\vskip 0 mm Part is not open to be viewed. It $accessmsg \\\\\\begin{minipage}{\\textwidth}";
956: } else {
957: $result="\\vskip 0 mm Part is not open to be viewed. It $accessmsg \\\\";
958: }
959: }
960: } else {
961: if ($target eq 'tex') {
962: if (not $ENV{'form.problem_split'}=~/yes/) {
963: $result.='\noindent \end{minipage}\vskip 0 mm \noindent \begin{minipage}{\textwidth}\noindent';
964: }
965: my $weight = &Apache::lonnet::EXT("resource.$id.weight");
966: if ($Apache::lonhomework::type eq 'exam') { $result .= '\fbox{\textit{'.$weight.' pt}}';}
967: }
968: }
969: }
970: } elsif ($target eq 'edit') {
971: $result.=&Apache::edit::tag_start($target,$token);
972: $result.=&Apache::edit::text_arg('Part ID:','id',$token).
973: &Apache::loncommon::help_open_topic("Part_Tag_Edit_Help").
974: &Apache::edit::end_row().&Apache::edit::start_spanning_row();
975: } elsif ($target eq 'modified') {
976: my $constructtag=&Apache::edit::get_new_args($token,$parstack,
977: $safeeval,'id');
978: if ($constructtag) {
979: $result = &Apache::edit::rebuild_tag($token);
980: $result.=&Apache::edit::handle_insert();
981: }
982: }
983: return $result;
984: }
985:
986: sub end_part {
987: my ($target,$token,$tagstack,$parstack,$parser,$safeeval)=@_;
988: &Apache::lonxml::debug("in end_part $target ");
989: my $status=$Apache::inputtags::status['-1'];
990: my $hidden=&Apache::loncommon::check_if_partid_hidden($Apache::inputtags::part);
991: my $result='';
992: if ( $target eq 'meta' ) {
993: $result='';
994: } elsif ( $target eq 'grade' && $status eq 'CAN_ANSWER' && !$hidden) {
995: $result=&Apache::inputtags::grade;
996: } elsif (($target eq 'web' || $target eq 'tex') && !$hidden ) {
997: my $gradestatus=&Apache::inputtags::gradestatus($Apache::inputtags::part,
998: $target);
999: if ($Apache::lonhomework::type eq 'exam') {$gradestatus='';}
1000: $result=$gradestatus;
1001: } elsif ($target eq 'edit') {
1002: $result=&Apache::edit::end_table();
1003: }
1004: pop @Apache::inputtags::status;
1005: $Apache::inputtags::part='';
1006: return $result;
1007: }
1008:
1009: sub start_preduedate {
1010: my ($target,$token,$tagstack,$parstack,$parser,$safeeval)=@_;
1011: if ($target eq 'web' || $target eq 'grade' || $target eq 'answer' || $target eq 'tex') {
1012: if ($Apache::inputtags::status['-1'] ne 'CAN_ANSWER' &&
1013: $Apache::inputtags::status['-1'] ne 'CANNOT_ANSWER' &&
1014: $Apache::inputtags::status['-1'] ne 'SHOW_ANSWER') {
1015: &Apache::lonxml::get_all_text("/preduedate",$parser);
1016: }
1017: }
1018: return '';
1019: }
1020:
1021: sub end_preduedate {
1022: return '';
1023: }
1024:
1025: sub start_postanswerdate {
1026: my ($target,$token,$tagstack,$parstack,$parser,$safeeval)=@_;
1027: if ($target eq 'web' || $target eq 'grade' || $target eq 'tex') {
1028: if ($Apache::inputtags::status['-1'] ne 'SHOW_ANSWER') {
1029: &Apache::lonxml::get_all_text("/postanswerdate",$parser);
1030: }
1031: } elsif ($target eq 'tex') {
1032: return '\vskip 0 mm \noindent';
1033: }
1034: return '';
1035: }
1036:
1037: sub end_postanswerdate {
1038: return '';
1039: }
1040:
1041: sub start_notsolved {
1042: my ($target,$token,$tagstack,$parstack,$parser,$safeeval)=@_;
1043: if ($target eq 'web' || $target eq 'grade' || $target eq 'answer' ||
1044: $target eq 'tex') {
1045: my $gradestatus=$Apache::lonhomework::history{"resource.$Apache::inputtags::part.solved"};
1046: &Apache::lonxml::debug("not solved has :$gradestatus:");
1047: if ($gradestatus =~ /^correct/) {
1048: &Apache::lonxml::debug("skipping");
1049: &Apache::lonxml::get_all_text("/notsolved",$parser);
1050: }
1051: }
1052: return '';
1053: }
1054:
1055: sub end_notsolved {
1056: return '';
1057: }
1058:
1059: sub start_solved {
1060: my ($target,$token,$tagstack,$parstack,$parser,$safeeval)=@_;
1061: if ($target eq 'web' || $target eq 'grade' || $target eq 'answer' ||
1062: $target eq 'tex') {
1063: my $gradestatus=$Apache::lonhomework::history{"resource.$Apache::inputtags::part.solved"};
1064: if ($gradestatus !~ /^correct/) {
1065: &Apache::lonxml::get_all_text("/solved",$parser);
1066: }
1067: }
1068: return '';
1069: }
1070:
1071: sub end_solved {
1072: return '';
1073: }
1074:
1075: sub start_startouttext {
1076: my ($target,$token,$tagstack,$parstack,$parser,$safeeval)=@_;
1077: my @result=(''.'');
1078: if ($target eq 'edit' || $target eq 'modified' ) { @result=('','no'); }
1079: return (@result);
1080: }
1081:
1082: sub end_startouttext {
1083: my ($target,$token,$tagstack,$parstack,$parser,$safeeval)=@_;
1084: my $result='';
1085: my $text='';
1086:
1087: if ($target eq 'edit') {
1088: $text=&Apache::lonxml::get_all_text("endouttext",$parser);
1089: $result.=&Apache::edit::start_table($token)."<tr><td>Text Block</td>
1090: <td>Delete:".
1091: &Apache::edit::deletelist($target,$token)
1092: ."</td>
1093: <td>".
1094: &Apache::edit::insertlist($target,$token).
1095: &Apache::edit::end_row().
1096: &Apache::edit::start_spanning_row()."\n"
1097: . &Apache::loncommon::helpLatexCheatsheet () .
1098: &Apache::edit::editfield($token->[1],$text,"",80,4);
1099: }
1100: if ($target eq 'modified') {
1101: $text=&Apache::lonxml::get_all_text("endouttext",$parser);
1102: $result='<startouttext />'.&Apache::edit::modifiedfield();
1103: }
1104: if ($target eq 'tex') {
1105: $result .= '\noindent ';
1106: }
1107: return $result;
1108: }
1109:
1110: sub start_endouttext {
1111: my ($target,$token,$tagstack,$parstack,$parser,$safeeval)=@_;
1112: my $result='';
1113: if ($target eq "edit" ) { $result="</td></tr>".&Apache::edit::end_table()."\n"; }
1114: if ($target eq "modified") {
1115: $result='<endouttext />'.
1116: &Apache::edit::handle_insertafter('startouttext'); }
1117: return $result;
1118: }
1119:
1120: sub end_endouttext {
1121: my ($target,$token,$tagstack,$parstack,$parser,$safeeval)=@_;
1122: my @result=('','');
1123: if ($target eq "edit" || $target eq 'modified') { @result=('','no'); }
1124: return (@result);
1125: }
1126:
1127: sub delete_startouttext {
1128: my ($target,$token,$tagstack,$parstack,$parser,$safeeval)=@_;
1129: # my $text=&Apache::lonxml::get_all_text("endouttext",$parser);
1130: my $text=$$parser['-1']->get_text("/endouttext");
1131: my $ntoken=$$parser['-1']->get_token();
1132: &Apache::lonxml::debug("Deleting :$text: and :$ntoken->[0]:$ntoken->[1]:$ntoken->[2]: for startouttext");
1133: &Apache::lonxml::end_tag($tagstack,$parstack,$ntoken);
1134: # Deleting 2 parallel tag pairs, but we need the numbers later to look like
1135: # they did the last time round
1136: &Apache::lonxml::increasedepth($ntoken);
1137: &Apache::lonxml::decreasedepth($ntoken);
1138: return 1;
1139: }
1140:
1141: sub start_simpleeditbutton {
1142: my ($target,$token,$tagstack,$parstack,$parser,$safeeval)=@_;
1143: my $result='';
1144: if (($target eq 'web') &&
1145: (&Apache::lonnet::allowed('srm',$ENV{'request.course.id'}))) {
1146: my $url=$ENV{'REQUEST_URI'};
1147: $url=~s/\?.*$//;
1148: $result='<table width="100%" bgcolor="#FFFFAA" border="2"><tr><td>'.
1149: '<a href="'.$url.'/smpedit">Simple Problem Editor</a> - Note: it can take up to 10 minutes for changes to take effect for all users.'.
1150: &Apache::loncommon::help_open_topic('Caching').'</td></tr></table><br />';
1151: }
1152: return $result;
1153: }
1154:
1155: sub end_simpleeditbutton {
1156: return '';
1157: }
1158:
1159: 1;
1160: __END__
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