1: # The LearningOnline Network with CAPA
2: # XML Parser Module
3: #
4: # $Id: lonxml.pm,v 1.383 2005/09/26 21:39:53 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: # Copyright for TtHfunc and TtMfunc by Ian Hutchinson.
29: # TtHfunc and TtMfunc (the "Code") may be compiled and linked into
30: # binary executable programs or libraries distributed by the
31: # Michigan State University (the "Licensee"), but any binaries so
32: # distributed are hereby licensed only for use in the context
33: # of a program or computational system for which the Licensee is the
34: # primary author or distributor, and which performs substantial
35: # additional tasks beyond the translation of (La)TeX into HTML.
36: # The C source of the Code may not be distributed by the Licensee
37: # to any other parties under any circumstances.
38: #
39:
40:
41: package Apache::lonxml;
42: use vars
43: qw(@pwd @outputstack $redirection $import @extlinks $metamode $evaluate %insertlist @namespace $errorcount $warningcount @htmlareafields);
44: use strict;
45: use HTML::LCParser();
46: use HTML::TreeBuilder();
47: use HTML::Entities();
48: use Safe();
49: use Safe::Hole();
50: use Math::Cephes();
51: use Math::Random();
52: use Opcode();
53: use POSIX qw(strftime);
54: use Time::HiRes qw( gettimeofday tv_interval );
55:
56: sub register {
57: my ($space,@taglist) = @_;
58: foreach my $temptag (@taglist) {
59: push(@{ $Apache::lonxml::alltags{$temptag} },$space);
60: }
61: }
62:
63: sub deregister {
64: my ($space,@taglist) = @_;
65: foreach my $temptag (@taglist) {
66: my $tempspace = $Apache::lonxml::alltags{$temptag}[-1];
67: if ($tempspace eq $space) {
68: pop(@{ $Apache::lonxml::alltags{$temptag} });
69: }
70: }
71: #&printalltags();
72: }
73:
74: use Apache::Constants qw(:common);
75: use Apache::lontexconvert();
76: use Apache::style();
77: use Apache::run();
78: use Apache::londefdef();
79: use Apache::scripttag();
80: use Apache::languagetags();
81: use Apache::edit();
82: use Apache::inputtags();
83: use Apache::outputtags();
84: use Apache::lonnet;
85: use Apache::File();
86: use Apache::loncommon();
87: use Apache::lonfeedback();
88: use Apache::lonmsg();
89: use Apache::loncacc();
90: use Apache::lonlocal;
91:
92: #================================================== Main subroutine: xmlparse
93: #debugging control, to turn on debugging modify the correct handler
94: $Apache::lonxml::debug=0;
95:
96: # keeps count of the number of warnings and errors generated in a parse
97: $warningcount=0;
98: $errorcount=0;
99:
100: #path to the directory containing the file currently being processed
101: @pwd=();
102:
103: #these two are used for capturing a subset of the output for later processing,
104: #don't touch them directly use &startredirection and &endredirection
105: @outputstack = ();
106: $redirection = 0;
107:
108: #controls wheter the <import> tag actually does
109: $import = 1;
110: @extlinks=();
111:
112: # meta mode is a bit weird only some output is to be turned off
113: #<output> tag turns metamode off (defined in londefdef.pm)
114: $metamode = 0;
115:
116: # turns on and of run::evaluate actually derefencing var refs
117: $evaluate = 1;
118:
119: # data structure for eidt mode, determines what tags can go into what other tags
120: %insertlist=();
121:
122: # stores the list of active tag namespaces
123: @namespace=();
124:
125: # has the dynamic menu been updated to know about this resource
126: $Apache::lonxml::registered=0;
127:
128: # a pointer the the Apache request object
129: $Apache::lonxml::request='';
130:
131: # a problem number counter, and check on ether it is used
132: $Apache::lonxml::counter=1;
133: $Apache::lonxml::counter_changed=0;
134:
135: #internal check on whether to look at style defs
136: $Apache::lonxml::usestyle=1;
137:
138: #locations used to store the parameter string for style substitutions
139: $Apache::lonxml::style_values='';
140: $Apache::lonxml::style_end_values='';
141:
142: #array of ssi calls that need to occur after we are done parsing
143: @Apache::lonxml::ssi_info=();
144:
145: #should we do the postag variable interpolation
146: $Apache::lonxml::post_evaluate=1;
147:
148: #a header message to emit in the case of any generated warning or errors
149: $Apache::lonxml::warnings_error_header='';
150:
151: sub xmlbegin {
152: my ($style)=@_;
153: my $output='';
154: @htmlareafields=();
155: if ($env{'browser.mathml'}) {
156: $output='<?xml version="1.0"?>'
157: #.'<?xml-stylesheet type="text/css" href="/adm/MathML/mathml.css"?>'."\n"
158: # .'<!DOCTYPE html SYSTEM "/adm/MathML/mathml.dtd" '
159:
160: # .'<!DOCTYPE html PUBLIC "-//W3C//DTD XHTML 1.0 Transitional//EN" "http://www.w3.org/TR/xhtml1/DTD/xhtml1-transitional.dtd" [<!ENTITY mathns "http://www.w3.org/1998/Math/MathML">] >'
161: .'<!DOCTYPE html PUBLIC "-//W3C//DTD XHTML 1.1 plus MathML 2.0 plus SVG 1.1//EN" "http://www.w3.org/2002/04/xhtml-math-svg/xhtml-math-svg.dtd">'
162: .'<html xmlns:math="http://www.w3.org/1998/Math/MathML" '
163: .'xmlns="http://www.w3.org/1999/xhtml">';
164: } else {
165: $output='<!DOCTYPE html PUBLIC "-//W3C//DTD XHTML 1.0 Transitional//EN" "http://www.w3.org/TR/xhtml1/DTD/xhtml1-transitional.dtd"><html>';
166: }
167: if ($style eq 'encode') {
168: $output=&HTML::Entities::encode($output,'<>&"');
169: }
170: return $output;
171: }
172:
173: sub xmlend {
174: my ($target,$parser)=@_;
175: my $mode='xml';
176: my $status='OPEN';
177: if ($Apache::lonhomework::parsing_a_problem ||
178: $Apache::lonhomework::parsing_a_task ) {
179: $mode='problem';
180: $status=$Apache::inputtags::status[-1];
181: }
182: my $discussion;
183: &Apache::loncommon::get_unprocessed_cgi($ENV{'QUERY_STRING'},
184: ['LONCAPA_INTERNAL_no_discussion']);
185: if (! exists($env{'form.LONCAPA_INTERNAL_no_discussion'}) ||
186: $env{'form.LONCAPA_INTERNAL_no_discussion'} ne 'true') {
187: $discussion=&Apache::lonfeedback::list_discussion($mode,$status);
188: }
189: if ($target eq 'tex') {
190: $discussion.='<tex>\keephidden{ENDOFPROBLEM}\vskip 0.5mm\noindent\makebox[\textwidth/$number_of_columns][b]{\hrulefill}\end{document}</tex>';
191: &Apache::lonxml::newparser($parser,\$discussion,'');
192: return '';
193: } else {
194: return $discussion.&Apache::loncommon::endbodytag();
195: }
196: }
197:
198: sub tokeninputfield {
199: my $defhost=$Apache::lonnet::perlvar{'lonHostID'};
200: $defhost=~tr/a-z/A-Z/;
201: return (<<ENDINPUTFIELD)
202: <script type="text/javascript">
203: function updatetoken() {
204: var comp=new Array;
205: var barcode=unescape(document.tokeninput.barcode.value);
206: comp=barcode.split('*');
207: if (typeof(comp[0])!="undefined") {
208: document.tokeninput.codeone.value=comp[0];
209: }
210: if (typeof(comp[1])!="undefined") {
211: document.tokeninput.codetwo.value=comp[1];
212: }
213: if (typeof(comp[2])!="undefined") {
214: comp[2]=comp[2].toUpperCase();
215: document.tokeninput.codethree.value=comp[2];
216: }
217: document.tokeninput.barcode.value='';
218: }
219: </script>
220: <form method="post" name="tokeninput">
221: <table border="2" bgcolor="#FFFFBB">
222: <tr><th>DocID Checkin</th></tr>
223: <tr><td>
224: <table>
225: <tr>
226: <td>Scan in Barcode</td>
227: <td><input type="text" size="22" name="barcode"
228: onChange="updatetoken()"/></td>
229: </tr>
230: <tr><td><i>or</i> Type in DocID</td>
231: <td>
232: <input type="text" size="5" name="codeone" />
233: <b><font size="+2">*</font></b>
234: <input type="text" size="5" name="codetwo" />
235: <b><font size="+2">*</font></b>
236: <input type="text" size="10" name="codethree" value="$defhost"
237: onChange="this.value=this.value.toUpperCase()" />
238: </td></tr>
239: </table>
240: </td></tr>
241: <tr><td><input type="submit" value="Check in DocID" /></td></tr>
242: </table>
243: </form>
244: ENDINPUTFIELD
245: }
246:
247: sub maketoken {
248: my ($symb,$tuname,$tudom,$tcrsid)=@_;
249: unless ($symb) {
250: $symb=&Apache::lonnet::symbread();
251: }
252: unless ($tuname) {
253: $tuname=$env{'user.name'};
254: $tudom=$env{'user.domain'};
255: $tcrsid=$env{'request.course.id'};
256: }
257:
258: return &Apache::lonnet::checkout($symb,$tuname,$tudom,$tcrsid);
259: }
260:
261: sub printtokenheader {
262: my ($target,$token,$tsymb,$tcrsid,$tudom,$tuname)=@_;
263: unless ($token) { return ''; }
264:
265: my ($symb,$courseid,$domain,$name) = &Apache::lonxml::whichuser();
266: unless ($tsymb) {
267: $tsymb=$symb;
268: }
269: unless ($tuname) {
270: $tuname=$name;
271: $tudom=$domain;
272: $tcrsid=$courseid;
273: }
274:
275: my %reply=&Apache::lonnet::get('environment',
276: ['firstname','middlename','lastname','generation'],
277: $tudom,$tuname);
278: my $plainname=$reply{'firstname'}.' '.
279: $reply{'middlename'}.' '.
280: $reply{'lastname'}.' '.
281: $reply{'generation'};
282:
283: if ($target eq 'web') {
284: my %idhash=&Apache::lonnet::idrget($tudom,($tuname));
285: return
286: '<img align="right" src="/cgi-bin/barcode.png?encode='.$token.'" />'.
287: &mt('Checked out for').' '.$plainname.
288: '<br />'.&mt('User').': '.$tuname.' at '.$tudom.
289: '<br />'.&mt('ID').': '.$idhash{$tuname}.
290: '<br />'.&mt('CourseID').': '.$tcrsid.
291: '<br />'.&mt('Course').': '.$env{'course.'.$tcrsid.'.description'}.
292: '<br />'.&mt('DocID').': '.$token.
293: '<br />'.&mt('Time').': '.&Apache::lonlocal::locallocaltime().'<hr />';
294: } else {
295: return $token;
296: }
297: }
298:
299: sub fontsettings {
300: my $headerstring='';
301: if (($env{'browser.os'} eq 'mac') && (!$env{'browser.mathml'})) {
302: $headerstring.=
303: '<meta Content-Type="text/html; charset=x-mac-roman" />';
304: } elsif (!$env{'browser.mathml'} && $env{'browser.unicode'}) {
305: $headerstring.=
306: '<meta http-equiv="Content-Type" content="text/html; charset=utf-8" />';
307: }
308: return $headerstring;
309: }
310:
311: sub printalltags {
312: my $temp;
313: foreach $temp (sort keys %Apache::lonxml::alltags) {
314: &Apache::lonxml::debug("$temp -- ".
315: join(',',@{ $Apache::lonxml::alltags{$temp} }));
316: }
317: }
318:
319: sub xmlparse {
320: my ($request,$target,$content_file_string,$safeinit,%style_for_target) = @_;
321:
322: &setup_globals($request,$target);
323: &Apache::inputtags::initialize_inputtags();
324: &Apache::bridgetask::initialize_bridgetask();
325: &Apache::outputtags::initialize_outputtags();
326: &Apache::edit::initialize_edit();
327: &Apache::londefdef::initialize_londefdef();
328:
329: #
330: # do we have a course style file?
331: #
332:
333: if ($env{'request.course.id'} && $env{'request.state'} ne 'construct') {
334: my $bodytext=
335: $env{'course.'.$env{'request.course.id'}.'.default_xml_style'};
336: if ($bodytext) {
337: foreach my $file (split(',',$bodytext)) {
338: my $location=&Apache::lonnet::filelocation('',$file);
339: my $styletext=&Apache::lonnet::getfile($location);
340: if ($styletext ne '-1') {
341: %style_for_target = (%style_for_target,
342: &Apache::style::styleparser($target,$styletext));
343: }
344: }
345: }
346: } elsif ($env{'construct.style'} && ($env{'request.state'} eq 'construct')) {
347: my $location=&Apache::lonnet::filelocation('',$env{'construct.style'});
348: my $styletext=&Apache::lonnet::getfile($location);
349: if ($styletext ne '-1') {
350: %style_for_target = (%style_for_target,
351: &Apache::style::styleparser($target,$styletext));
352: }
353: }
354: #&printalltags();
355: my @pars = ();
356: my $pwd=$env{'request.filename'};
357: $pwd =~ s:/[^/]*$::;
358: &newparser(\@pars,\$content_file_string,$pwd);
359:
360: my $safeeval = new Safe;
361: my $safehole = new Safe::Hole;
362: &init_safespace($target,$safeeval,$safehole,$safeinit);
363: #-------------------- Redefinition of the target in the case of compound target
364:
365: ($target, my @tenta) = split('&&',$target);
366:
367: my @stack = ();
368: my @parstack = ();
369: &initdepth();
370: &init_alarm();
371: my $finaloutput = &inner_xmlparse($target,\@stack,\@parstack,\@pars,
372: $safeeval,\%style_for_target);
373:
374: if ($env{'request.uri'}) {
375: &writeallows($env{'request.uri'});
376: }
377: &do_registered_ssi();
378: if ($Apache::lonxml::counter_changed) { &store_counter() }
379: if ($env{'form.return_only_error_and_warning_counts'}) {
380: return "$errorcount:$warningcount";
381: }
382: return $finaloutput;
383: }
384:
385: sub latex_special_symbols {
386: my ($string,$where)=@_;
387: if ($where eq 'header') {
388: $string =~ s/(\\|_|\^)/ /g;
389: $string =~ s/(\$|%|\{|\})/\\$1/g;
390: $string =~ s/_/ /g;
391: $string=&Apache::lonprintout::character_chart($string);
392: # any & or # leftover should be safe to just escape
393: $string=~s/([^\\])\&/$1\\\&/g;
394: $string=~s/([^\\])\#/$1\\\#/g;
395: } else {
396: $string=~s/\\/\\ensuremath{\\backslash}/g;
397: $string=~s/\\\%|\%/\\\%/g;
398: $string=~s/\\{|{/\\{/g;
399: $string=~s/\\}|}/\\}/g;
400: $string=~s/\\ensuremath\\{\\backslash\\}/\\ensuremath{\\backslash}/g;
401: $string=~s/\\\$|\$/\\\$/g;
402: $string=~s/\\\_|\_/\\\_/g;
403: $string=~s/([^\\]|^)(\~|\^)/$1\\$2\\strut /g;
404: $string=~s/(>|<)/\\ensuremath\{$1\}/g; #more or less
405: $string=&Apache::lonprintout::character_chart($string);
406: # any & or # leftover should be safe to just escape
407: $string=~s/\\\&|\&/\\\&/g;
408: $string=~s/\\\#|\#/\\\#/g;
409: $string=~s/\|/\$\\mid\$/g;
410: #single { or } How to escape?
411: }
412: return $string;
413: }
414:
415: sub inner_xmlparse {
416: my ($target,$stack,$parstack,$pars,$safeeval,$style_for_target)=@_;
417: my $finaloutput = '';
418: my $result;
419: my $token;
420: my $dontpop=0;
421: while ( $#$pars > -1 ) {
422: while ($token = $$pars['-1']->get_token) {
423: if (($token->[0] eq 'T') || ($token->[0] eq 'C') ) {
424: if ($metamode<1) {
425: my $text=$token->[1];
426: if ($token->[0] eq 'C' && $target eq 'tex') {
427: $text = '';
428: # $text = '%'.$text."\n";
429: }
430: $result.=$text;
431: }
432: } elsif (($token->[0] eq 'D')) {
433: if ($metamode<1 && $target eq 'web') {
434: my $text=$token->[1];
435: $result.=$text;
436: }
437: } elsif ($token->[0] eq 'PI') {
438: if ($metamode<1 && $target eq 'web') {
439: $result=$token->[2];
440: }
441: } elsif ($token->[0] eq 'S') {
442: # add tag to stack
443: push (@$stack,$token->[1]);
444: # add parameters list to another stack
445: push (@$parstack,&parstring($token));
446: &increasedepth($token);
447: if ($Apache::lonxml::usestyle &&
448: exists($$style_for_target{$token->[1]})) {
449: $Apache::lonxml::usestyle=0;
450: my $string=$$style_for_target{$token->[1]}.
451: '<LONCAPA_INTERNAL_TURN_STYLE_ON />';
452: &Apache::lonxml::newparser($pars,\$string);
453: $Apache::lonxml::style_values=$$parstack[-1];
454: $Apache::lonxml::style_end_values=$$parstack[-1];
455: } else {
456: $result = &callsub("start_$token->[1]", $target, $token, $stack,
457: $parstack, $pars, $safeeval, $style_for_target);
458: }
459: } elsif ($token->[0] eq 'E') {
460: if ($Apache::lonxml::usestyle &&
461: exists($$style_for_target{'/'."$token->[1]"})) {
462: $Apache::lonxml::usestyle=0;
463: my $string=$$style_for_target{'/'.$token->[1]}.
464: '<LONCAPA_INTERNAL_TURN_STYLE_ON end="'.$token->[1].'" />';
465: &Apache::lonxml::newparser($pars,\$string);
466: $Apache::lonxml::style_values=$Apache::lonxml::style_end_values;
467: $Apache::lonxml::style_end_values='';
468: $dontpop=1;
469: } else {
470: #clear out any tags that didn't end
471: while ($token->[1] ne $$stack['-1'] && ($#$stack > -1)) {
472: my $lasttag=$$stack[-1];
473: if ($token->[1] =~ /^\Q$lasttag\E$/i) {
474: &Apache::lonxml::warning('Using tag </'.$token->[1].'> on line '.$token->[3].' as end tag to <'.$$stack[-1].'>');
475: last;
476: } else {
477: &Apache::lonxml::warning('Found tag </'.$token->[1].'> on line '.$token->[3].' when looking for </'.$$stack[-1].'> in file');
478: &end_tag($stack,$parstack,$token);
479: }
480: }
481: $result = &callsub("end_$token->[1]", $target, $token, $stack,
482: $parstack, $pars,$safeeval, $style_for_target);
483: }
484: } else {
485: &Apache::lonxml::error("Unknown token event :$token->[0]:$token->[1]:");
486: }
487: #evaluate variable refs in result
488: if ($Apache::lonxml::post_evaluate &&$result ne "") {
489: my $extras;
490: if (!$Apache::lonxml::usestyle) {
491: $extras=$Apache::lonxml::style_values;
492: }
493: if ( $#$parstack > -1 ) {
494: $result=&Apache::run::evaluate($result,$safeeval,$extras.$$parstack[-1]);
495: } else {
496: $result= &Apache::run::evaluate($result,$safeeval,$extras);
497: }
498: }
499: $Apache::lonxml::post_evaluate=1;
500:
501: if (($token->[0] eq 'T') || ($token->[0] eq 'C') || ($token->[0] eq 'D') ) {
502: #Style file definitions should be correct
503: if ($target eq 'tex' && ($Apache::lonxml::usestyle)) {
504: $result=&latex_special_symbols($result);
505: }
506: }
507:
508: if ($Apache::lonxml::redirection) {
509: $Apache::lonxml::outputstack['-1'] .= $result;
510: } else {
511: $finaloutput.=$result;
512: }
513: $result = '';
514:
515: if ($token->[0] eq 'E' && !$dontpop) {
516: &end_tag($stack,$parstack,$token);
517: }
518: $dontpop=0;
519: }
520: if ($#$pars > -1) {
521: pop @$pars;
522: pop @Apache::lonxml::pwd;
523: }
524: }
525:
526: # if ($target eq 'meta') {
527: # $finaloutput.=&endredirection;
528: # }
529:
530:
531: if (($ENV{'QUERY_STRING'}) && ($target eq 'web')) {
532: $finaloutput=&afterburn($finaloutput);
533: }
534: return $finaloutput;
535: }
536:
537: ##
538: ## Looks to see if there is a subroutine defined for this tag. If so, call it,
539: ## otherwise do not call it as we do not know what it is.
540: ##
541: sub callsub {
542: my ($sub,$target,$token,$tagstack,$parstack,$parser,$safeeval,$style)=@_;
543: my $currentstring='';
544: my $nodefault;
545: {
546: my $sub1;
547: no strict 'refs';
548: my $tag=$token->[1];
549: # get utterly rid of extended html tags
550: if ($tag=~/^x\-/i) { return ''; }
551: my $space=$Apache::lonxml::alltags{$tag}[-1];
552: if (!$space) {
553: $tag=~tr/A-Z/a-z/;
554: $sub=~tr/A-Z/a-z/;
555: $space=$Apache::lonxml::alltags{$tag}[-1]
556: }
557:
558: my $deleted=0;
559: $Apache::lonxml::curdepth=join('_',@Apache::lonxml::depthcounter);
560: if (($token->[0] eq 'S') && ($target eq 'modified')) {
561: $deleted=&Apache::edit::handle_delete($space,$target,$token,$tagstack,
562: $parstack,$parser,$safeeval,
563: $style);
564: }
565: if (!$deleted) {
566: if ($space) {
567: #&Apache::lonxml::debug("Calling sub $sub in $space $metamode");
568: $sub1="$space\:\:$sub";
569: ($currentstring,$nodefault) = &$sub1($target,$token,$tagstack,
570: $parstack,$parser,$safeeval,
571: $style);
572: } else {
573: if ($target eq 'tex') {
574: # throw away tag name
575: return '';
576: }
577: #&Apache::lonxml::debug("NOT Calling sub $sub in $space $metamode");
578: if ($metamode <1) {
579: if (defined($token->[4]) && ($metamode < 1)) {
580: $currentstring = $token->[4];
581: } else {
582: $currentstring = $token->[2];
583: }
584: }
585: }
586: # &Apache::lonxml::debug("nodefalt:$nodefault:");
587: if ($currentstring eq '' && $nodefault eq '') {
588: if ($target eq 'edit') {
589: #&Apache::lonxml::debug("doing default edit for $token->[1]");
590: if ($token->[0] eq 'S') {
591: $currentstring = &Apache::edit::tag_start($target,$token);
592: } elsif ($token->[0] eq 'E') {
593: $currentstring = &Apache::edit::tag_end($target,$token);
594: }
595: } elsif ($target eq 'modified') {
596: if ($token->[0] eq 'S') {
597: $currentstring = $token->[4];
598: $currentstring.=&Apache::edit::handle_insert();
599: } elsif ($token->[0] eq 'E') {
600: $currentstring = $token->[2];
601: $currentstring.=&Apache::edit::handle_insertafter($token->[1]);
602: } else {
603: $currentstring = $token->[2];
604: }
605: }
606: }
607: }
608: use strict 'refs';
609: }
610: return $currentstring;
611: }
612:
613: sub setup_globals {
614: my ($request,$target)=@_;
615: $Apache::lonxml::request=$request;
616: $Apache::lonxml::registered = 0;
617: @Apache::lonxml::htmlareafields=();
618: $errorcount=0;
619: $warningcount=0;
620: $Apache::lonxml::default_homework_loaded=0;
621: $Apache::lonxml::usestyle=1;
622: &init_counter();
623: @Apache::lonxml::pwd=();
624: @Apache::lonxml::extlinks=();
625: @Apache::lonxml::ssi_info=();
626: $Apache::lonxml::post_evaluate=1;
627: $Apache::lonxml::warnings_error_header='';
628: if ($target eq 'meta') {
629: $Apache::lonxml::redirection = 0;
630: $Apache::lonxml::metamode = 1;
631: $Apache::lonxml::evaluate = 1;
632: $Apache::lonxml::import = 0;
633: } elsif ($target eq 'answer') {
634: $Apache::lonxml::redirection = 0;
635: $Apache::lonxml::metamode = 1;
636: $Apache::lonxml::evaluate = 1;
637: $Apache::lonxml::import = 1;
638: } elsif ($target eq 'grade') {
639: &startredirection;
640: $Apache::lonxml::metamode = 0;
641: $Apache::lonxml::evaluate = 1;
642: $Apache::lonxml::import = 1;
643: } elsif ($target eq 'modified') {
644: $Apache::lonxml::redirection = 0;
645: $Apache::lonxml::metamode = 0;
646: $Apache::lonxml::evaluate = 0;
647: $Apache::lonxml::import = 0;
648: } elsif ($target eq 'edit') {
649: $Apache::lonxml::redirection = 0;
650: $Apache::lonxml::metamode = 0;
651: $Apache::lonxml::evaluate = 0;
652: $Apache::lonxml::import = 0;
653: } elsif ($target eq 'analyze') {
654: $Apache::lonxml::redirection = 0;
655: $Apache::lonxml::metamode = 0;
656: $Apache::lonxml::evaluate = 1;
657: $Apache::lonxml::import = 1;
658: } else {
659: $Apache::lonxml::redirection = 0;
660: $Apache::lonxml::metamode = 0;
661: $Apache::lonxml::evaluate = 1;
662: $Apache::lonxml::import = 1;
663: }
664: }
665:
666: sub init_safespace {
667: my ($target,$safeeval,$safehole,$safeinit) = @_;
668: $safeeval->deny_only(':dangerous');
669: $safeeval->reval('use Math::Complex;');
670: $safeeval->permit_only(":default");
671: $safeeval->permit("entereval");
672: $safeeval->permit(":base_math");
673: $safeeval->permit("sort");
674: $safeeval->permit("time");
675: $safeeval->deny("rand");
676: $safeeval->deny("srand");
677: $safeeval->deny(":base_io");
678: $safehole->wrap(\&Apache::scripttag::xmlparse,$safeeval,'&xmlparse');
679: $safehole->wrap(\&Apache::outputtags::multipart,$safeeval,'&multipart');
680: $safehole->wrap(\&Apache::lonnet::EXT,$safeeval,'&EXT');
681: $safehole->wrap(\&Apache::chemresponse::chem_standard_order,$safeeval,
682: '&chem_standard_order');
683: $safehole->wrap(\&Apache::response::check_status,$safeeval,'&check_status');
684:
685: $safehole->wrap(\&Math::Cephes::asin,$safeeval,'&asin');
686: $safehole->wrap(\&Math::Cephes::acos,$safeeval,'&acos');
687: $safehole->wrap(\&Math::Cephes::atan,$safeeval,'&atan');
688: $safehole->wrap(\&Math::Cephes::sinh,$safeeval,'&sinh');
689: $safehole->wrap(\&Math::Cephes::cosh,$safeeval,'&cosh');
690: $safehole->wrap(\&Math::Cephes::tanh,$safeeval,'&tanh');
691: $safehole->wrap(\&Math::Cephes::asinh,$safeeval,'&asinh');
692: $safehole->wrap(\&Math::Cephes::acosh,$safeeval,'&acosh');
693: $safehole->wrap(\&Math::Cephes::atanh,$safeeval,'&atanh');
694: $safehole->wrap(\&Math::Cephes::erf,$safeeval,'&erf');
695: $safehole->wrap(\&Math::Cephes::erfc,$safeeval,'&erfc');
696: $safehole->wrap(\&Math::Cephes::j0,$safeeval,'&j0');
697: $safehole->wrap(\&Math::Cephes::j1,$safeeval,'&j1');
698: $safehole->wrap(\&Math::Cephes::jn,$safeeval,'&jn');
699: $safehole->wrap(\&Math::Cephes::jv,$safeeval,'&jv');
700: $safehole->wrap(\&Math::Cephes::y0,$safeeval,'&y0');
701: $safehole->wrap(\&Math::Cephes::y1,$safeeval,'&y1');
702: $safehole->wrap(\&Math::Cephes::yn,$safeeval,'&yn');
703: $safehole->wrap(\&Math::Cephes::yv,$safeeval,'&yv');
704:
705: $safehole->wrap(\&Math::Cephes::bdtr ,$safeeval,'&bdtr' );
706: $safehole->wrap(\&Math::Cephes::bdtrc ,$safeeval,'&bdtrc' );
707: $safehole->wrap(\&Math::Cephes::bdtri ,$safeeval,'&bdtri' );
708: $safehole->wrap(\&Math::Cephes::btdtr ,$safeeval,'&btdtr' );
709: $safehole->wrap(\&Math::Cephes::chdtr ,$safeeval,'&chdtr' );
710: $safehole->wrap(\&Math::Cephes::chdtrc,$safeeval,'&chdtrc');
711: $safehole->wrap(\&Math::Cephes::chdtri,$safeeval,'&chdtri');
712: $safehole->wrap(\&Math::Cephes::fdtr ,$safeeval,'&fdtr' );
713: $safehole->wrap(\&Math::Cephes::fdtrc ,$safeeval,'&fdtrc' );
714: $safehole->wrap(\&Math::Cephes::fdtri ,$safeeval,'&fdtri' );
715: $safehole->wrap(\&Math::Cephes::gdtr ,$safeeval,'&gdtr' );
716: $safehole->wrap(\&Math::Cephes::gdtrc ,$safeeval,'&gdtrc' );
717: $safehole->wrap(\&Math::Cephes::nbdtr ,$safeeval,'&nbdtr' );
718: $safehole->wrap(\&Math::Cephes::nbdtrc,$safeeval,'&nbdtrc');
719: $safehole->wrap(\&Math::Cephes::nbdtri,$safeeval,'&nbdtri');
720: $safehole->wrap(\&Math::Cephes::ndtr ,$safeeval,'&ndtr' );
721: $safehole->wrap(\&Math::Cephes::ndtri ,$safeeval,'&ndtri' );
722: $safehole->wrap(\&Math::Cephes::pdtr ,$safeeval,'&pdtr' );
723: $safehole->wrap(\&Math::Cephes::pdtrc ,$safeeval,'&pdtrc' );
724: $safehole->wrap(\&Math::Cephes::pdtri ,$safeeval,'&pdtri' );
725: $safehole->wrap(\&Math::Cephes::stdtr ,$safeeval,'&stdtr' );
726: $safehole->wrap(\&Math::Cephes::stdtri,$safeeval,'&stdtri');
727:
728: $safehole->wrap(\&Math::Cephes::Matrix::mat,$safeeval,'&mat');
729: $safehole->wrap(\&Math::Cephes::Matrix::new,$safeeval,
730: '&Math::Cephes::Matrix::new');
731: $safehole->wrap(\&Math::Cephes::Matrix::coef,$safeeval,
732: '&Math::Cephes::Matrix::coef');
733: $safehole->wrap(\&Math::Cephes::Matrix::clr,$safeeval,
734: '&Math::Cephes::Matrix::clr');
735: $safehole->wrap(\&Math::Cephes::Matrix::add,$safeeval,
736: '&Math::Cephes::Matrix::add');
737: $safehole->wrap(\&Math::Cephes::Matrix::sub,$safeeval,
738: '&Math::Cephes::Matrix::sub');
739: $safehole->wrap(\&Math::Cephes::Matrix::mul,$safeeval,
740: '&Math::Cephes::Matrix::mul');
741: $safehole->wrap(\&Math::Cephes::Matrix::div,$safeeval,
742: '&Math::Cephes::Matrix::div');
743: $safehole->wrap(\&Math::Cephes::Matrix::inv,$safeeval,
744: '&Math::Cephes::Matrix::inv');
745: $safehole->wrap(\&Math::Cephes::Matrix::transp,$safeeval,
746: '&Math::Cephes::Matrix::transp');
747: $safehole->wrap(\&Math::Cephes::Matrix::simq,$safeeval,
748: '&Math::Cephes::Matrix::simq');
749: $safehole->wrap(\&Math::Cephes::Matrix::mat_to_vec,$safeeval,
750: '&Math::Cephes::Matrix::mat_to_vec');
751: $safehole->wrap(\&Math::Cephes::Matrix::vec_to_mat,$safeeval,
752: '&Math::Cephes::Matrix::vec_to_mat');
753: $safehole->wrap(\&Math::Cephes::Matrix::check,$safeeval,
754: '&Math::Cephes::Matrix::check');
755: $safehole->wrap(\&Math::Cephes::Matrix::check,$safeeval,
756: '&Math::Cephes::Matrix::check');
757:
758: # $safehole->wrap(\&Math::Cephes::new_fract,$safeeval,'&new_fract');
759: # $safehole->wrap(\&Math::Cephes::radd,$safeeval,'&radd');
760: # $safehole->wrap(\&Math::Cephes::rsub,$safeeval,'&rsub');
761: # $safehole->wrap(\&Math::Cephes::rmul,$safeeval,'&rmul');
762: # $safehole->wrap(\&Math::Cephes::rdiv,$safeeval,'&rdiv');
763: # $safehole->wrap(\&Math::Cephes::euclid,$safeeval,'&euclid');
764:
765: $safehole->wrap(\&Math::Random::random_beta,$safeeval,'&math_random_beta');
766: $safehole->wrap(\&Math::Random::random_chi_square,$safeeval,'&math_random_chi_square');
767: $safehole->wrap(\&Math::Random::random_exponential,$safeeval,'&math_random_exponential');
768: $safehole->wrap(\&Math::Random::random_f,$safeeval,'&math_random_f');
769: $safehole->wrap(\&Math::Random::random_gamma,$safeeval,'&math_random_gamma');
770: $safehole->wrap(\&Math::Random::random_multivariate_normal,$safeeval,'&math_random_multivariate_normal');
771: $safehole->wrap(\&Math::Random::random_multinomial,$safeeval,'&math_random_multinomial');
772: $safehole->wrap(\&Math::Random::random_noncentral_chi_square,$safeeval,'&math_random_noncentral_chi_square');
773: $safehole->wrap(\&Math::Random::random_noncentral_f,$safeeval,'&math_random_noncentral_f');
774: $safehole->wrap(\&Math::Random::random_normal,$safeeval,'&math_random_normal');
775: $safehole->wrap(\&Math::Random::random_permutation,$safeeval,'&math_random_permutation');
776: $safehole->wrap(\&Math::Random::random_permuted_index,$safeeval,'&math_random_permuted_index');
777: $safehole->wrap(\&Math::Random::random_uniform,$safeeval,'&math_random_uniform');
778: $safehole->wrap(\&Math::Random::random_poisson,$safeeval,'&math_random_poisson');
779: $safehole->wrap(\&Math::Random::random_uniform_integer,$safeeval,'&math_random_uniform_integer');
780: $safehole->wrap(\&Math::Random::random_negative_binomial,$safeeval,'&math_random_negative_binomial');
781: $safehole->wrap(\&Math::Random::random_binomial,$safeeval,'&math_random_binomial');
782: $safehole->wrap(\&Math::Random::random_seed_from_phrase,$safeeval,'&random_seed_from_phrase');
783: $safehole->wrap(\&Math::Random::random_set_seed_from_phrase,$safeeval,'&random_set_seed_from_phrase');
784: $safehole->wrap(\&Math::Random::random_get_seed,$safeeval,'&random_get_seed');
785: $safehole->wrap(\&Math::Random::random_set_seed,$safeeval,'&random_set_seed');
786: $safehole->wrap(\&Apache::lonxml::error,$safeeval,'&LONCAPA_INTERNAL_ERROR');
787: $safehole->wrap(\&Apache::lonxml::debug,$safeeval,'&LONCAPA_INTERNAL_DEBUG');
788: $safehole->wrap(\&Apache::caparesponse::get_sigrange,$safeeval,'&LONCAPA_INTERNAL_get_sigrange');
789:
790: #need to inspect this class of ops
791: # $safeeval->deny(":base_orig");
792: $safeeval->permit("require");
793: $safeinit .= ';$external::target="'.$target.'";';
794: &Apache::run::run($safeinit,$safeeval);
795: &initialize_rndseed($safeeval);
796: }
797:
798: sub initialize_rndseed {
799: my ($safeeval)=@_;
800: my $rndseed;
801: my ($symb,$courseid,$domain,$name) = &Apache::lonxml::whichuser();
802: $rndseed=&Apache::lonnet::rndseed($symb,$courseid,$domain,$name);
803: my $safeinit = '$external::randomseed="'.$rndseed.'";';
804: &Apache::lonxml::debug("Setting rndseed to $rndseed");
805: &Apache::run::run($safeinit,$safeeval);
806: }
807:
808: sub default_homework_load {
809: my ($safeeval)=@_;
810: &Apache::lonxml::debug('Loading default_homework');
811: my $default=&Apache::lonnet::getfile('/home/httpd/html/res/adm/includes/default_homework.lcpm');
812: if ($default eq -1) {
813: &Apache::lonxml::error("<b>Unable to find <i>default_homework.lcpm</i></b>");
814: } else {
815: &Apache::run::run($default,$safeeval);
816: $Apache::lonxml::default_homework_loaded=1;
817: }
818: }
819:
820: {
821: my $alarm_depth;
822: sub init_alarm {
823: alarm(0);
824: $alarm_depth=0;
825: }
826:
827: sub start_alarm {
828: if ($alarm_depth<1) {
829: my $old=alarm($Apache::lonnet::perlvar{'lonScriptTimeout'});
830: if ($old) {
831: &Apache::lonxml::error("Cancelled an alarm of $old, this shouldn't occur.");
832: }
833: }
834: $alarm_depth++;
835: }
836:
837: sub end_alarm {
838: $alarm_depth--;
839: if ($alarm_depth<1) { alarm(0); }
840: }
841: }
842: my $metamode_was;
843: sub startredirection {
844: if (!$Apache::lonxml::redirection) {
845: $metamode_was=$Apache::lonxml::metamode;
846: }
847: $Apache::lonxml::metamode=0;
848: $Apache::lonxml::redirection++;
849: push (@Apache::lonxml::outputstack, '');
850: }
851:
852: sub endredirection {
853: if (!$Apache::lonxml::redirection) {
854: &Apache::lonxml::error("Endredirection was called before a startredirection, perhaps you have unbalanced tags. Some debugging information:".join ":",caller);
855: return '';
856: }
857: $Apache::lonxml::redirection--;
858: if (!$Apache::lonxml::redirection) {
859: $Apache::lonxml::metamode=$metamode_was;
860: }
861: pop @Apache::lonxml::outputstack;
862: }
863:
864: sub end_tag {
865: my ($tagstack,$parstack,$token)=@_;
866: pop(@$tagstack);
867: pop(@$parstack);
868: &decreasedepth($token);
869: }
870:
871: sub initdepth {
872: @Apache::lonxml::depthcounter=();
873: $Apache::lonxml::depth=-1;
874: $Apache::lonxml::olddepth=-1;
875: }
876:
877: my @timers;
878: my $lasttime;
879: sub increasedepth {
880: my ($token) = @_;
881: $Apache::lonxml::depth++;
882: $Apache::lonxml::depthcounter[$Apache::lonxml::depth]++;
883: if ($Apache::lonxml::depthcounter[$Apache::lonxml::depth]==1) {
884: $Apache::lonxml::olddepth=$Apache::lonxml::depth;
885: }
886: my $time;
887: if ($Apache::lonxml::debug eq "1") {
888: push(@timers,[&gettimeofday()]);
889: $time=&tv_interval($lasttime);
890: $lasttime=[&gettimeofday()];
891: }
892: my $spacing=' 'x($Apache::lonxml::depth-1);
893: my $curdepth=join('_',@Apache::lonxml::depthcounter);
894: &Apache::lonxml::debug("s$spacing$Apache::lonxml::depth : $Apache::lonxml::olddepth : $curdepth : $token->[1] : $time : \n");
895: #print "<br />s $Apache::lonxml::depth : $Apache::lonxml::olddepth : $curdepth : $token->[1]\n";
896: }
897:
898: sub decreasedepth {
899: my ($token) = @_;
900: $Apache::lonxml::depth--;
901: if ($Apache::lonxml::depth<$Apache::lonxml::olddepth-1) {
902: $#Apache::lonxml::depthcounter--;
903: $Apache::lonxml::olddepth=$Apache::lonxml::depth+1;
904: }
905: if ( $Apache::lonxml::depth < -1) {
906: &Apache::lonxml::warning(&mt("Missing tags, unable to properly run file."));
907: $Apache::lonxml::depth='-1';
908: }
909: my ($timer,$time);
910: if ($Apache::lonxml::debug eq "1") {
911: $timer=pop(@timers);
912: $time=&tv_interval($lasttime);
913: $lasttime=[&gettimeofday()];
914: }
915: my $spacing=' 'x$Apache::lonxml::depth;
916: my $curdepth=join('_',@Apache::lonxml::depthcounter);
917: &Apache::lonxml::debug("e$spacing$Apache::lonxml::depth : $Apache::lonxml::olddepth : $curdepth : $token->[1] : $time : ".&tv_interval($timer)."\n");
918: #print "<br />e $Apache::lonxml::depth : $Apache::lonxml::olddepth : $token->[1] : $curdepth\n";
919: }
920:
921: sub get_all_text_unbalanced {
922: #there is a copy of this in lonpublisher.pm
923: my($tag,$pars)= @_;
924: my $token;
925: my $result='';
926: $tag='<'.$tag.'>';
927: while ($token = $$pars[-1]->get_token) {
928: if (($token->[0] eq 'T')||($token->[0] eq 'C')||($token->[0] eq 'D')) {
929: if ($token->[2]) {
930: $result.='<![CDATA['.$token->[1].']]>';
931: } else {
932: $result.=$token->[1];
933: }
934: } elsif ($token->[0] eq 'PI') {
935: $result.=$token->[2];
936: } elsif ($token->[0] eq 'S') {
937: $result.=$token->[4];
938: } elsif ($token->[0] eq 'E') {
939: $result.=$token->[2];
940: }
941: if ($result =~ /\Q$tag\E/is) {
942: ($result,my $redo)=$result =~ /(.*)\Q$tag\E(.*)/is;
943: #&Apache::lonxml::debug('Got a winner with leftovers ::'.$2);
944: #&Apache::lonxml::debug('Result is :'.$1);
945: $redo=$tag.$redo;
946: &Apache::lonxml::newparser($pars,\$redo);
947: last;
948: }
949: }
950: return $result
951: }
952:
953: sub increment_counter {
954: my ($increment) = @_;
955: if (defined($increment) && $increment gt 0) {
956: $Apache::lonxml::counter+=$increment;
957: } else {
958: $Apache::lonxml::counter++;
959: }
960: $Apache::lonxml::counter_changed=1;
961: }
962:
963: sub init_counter {
964: if (defined($env{'form.counter'})) {
965: $Apache::lonxml::counter=$env{'form.counter'};
966: $Apache::lonxml::counter_changed=0;
967: } else {
968: $Apache::lonxml::counter=1;
969: $Apache::lonxml::counter_changed=1;
970: }
971: }
972:
973: sub store_counter {
974: &Apache::lonnet::appenv(('form.counter' => $Apache::lonxml::counter));
975: return '';
976: }
977:
978: sub get_all_text {
979: my($tag,$pars,$style)= @_;
980: my $gotfullstack=1;
981: if (ref($pars) ne 'ARRAY') {
982: $gotfullstack=0;
983: $pars=[$pars];
984: }
985: if (ref($style) ne 'HASH') {
986: $style={};
987: }
988: my $depth=0;
989: my $token;
990: my $result='';
991: if ( $tag =~ m:^/: ) {
992: my $tag=substr($tag,1);
993: #&Apache::lonxml::debug("have:$tag:");
994: my $top_empty=0;
995: while (($depth >=0) && ($#$pars > -1) && (!$top_empty)) {
996: while (($depth >=0) && ($token = $$pars[-1]->get_token)) {
997: #&Apache::lonxml::debug("e token:$token->[0]:$depth:$token->[1]:".$#$pars.":".$#Apache::lonxml::pwd);
998: if (($token->[0] eq 'T')||($token->[0] eq 'C')||($token->[0] eq 'D')) {
999: if ($token->[2]) {
1000: $result.='<![CDATA['.$token->[1].']]>';
1001: } else {
1002: $result.=$token->[1];
1003: }
1004: } elsif ($token->[0] eq 'PI') {
1005: $result.=$token->[2];
1006: } elsif ($token->[0] eq 'S') {
1007: if ($token->[1] =~ /^\Q$tag\E$/i) { $depth++; }
1008: if ($token->[1] =~ /^LONCAPA_INTERNAL_TURN_STYLE_ON$/) { $Apache::lonxml::usestyle=1; }
1009: if ($token->[1] =~ /^LONCAPA_INTERNAL_TURN_STYLE_OFF$/) { $Apache::lonxml::usestyle=0; }
1010: $result.=$token->[4];
1011: } elsif ($token->[0] eq 'E') {
1012: if ( $token->[1] =~ /^\Q$tag\E$/i) { $depth--; }
1013: #skip sending back the last end tag
1014: if ($depth == 0 && exists($$style{'/'.$token->[1]}) && $Apache::lonxml::usestyle) {
1015: my $string=
1016: '<LONCAPA_INTERNAL_TURN_STYLE_OFF end="yes" />'.
1017: $$style{'/'.$token->[1]}.
1018: $token->[2].
1019: '<LONCAPA_INTERNAL_TURN_STYLE_ON />';
1020: &Apache::lonxml::newparser($pars,\$string);
1021: #&Apache::lonxml::debug("reParsing $string");
1022: next;
1023: }
1024: if ($depth > -1) {
1025: $result.=$token->[2];
1026: } else {
1027: $$pars[-1]->unget_token($token);
1028: }
1029: }
1030: }
1031: if (($depth >=0) && ($#$pars == 0) ) { $top_empty=1; }
1032: if (($depth >=0) && ($#$pars > 0) ) {
1033: pop(@$pars);
1034: pop(@Apache::lonxml::pwd);
1035: }
1036: }
1037: if ($top_empty && $depth >= 0) {
1038: #never found the end tag ran out of text, throw error send back blank
1039: &error('Never found end tag for <'.$tag.
1040: '> current string <pre>'.
1041: &HTML::Entities::encode($result,'<>&"').
1042: '</pre>');
1043: if ($gotfullstack) {
1044: my $newstring='</'.$tag.'>'.$result;
1045: &Apache::lonxml::newparser($pars,\$newstring);
1046: }
1047: $result='';
1048: }
1049: } else {
1050: while ($#$pars > -1) {
1051: while ($token = $$pars[-1]->get_token) {
1052: #&Apache::lonxml::debug("s token:$token->[0]:$depth:$token->[1]");
1053: if (($token->[0] eq 'T')||($token->[0] eq 'C')||
1054: ($token->[0] eq 'D')) {
1055: if ($token->[2]) {
1056: $result.='<![CDATA['.$token->[1].']]>';
1057: } else {
1058: $result.=$token->[1];
1059: }
1060: } elsif ($token->[0] eq 'PI') {
1061: $result.=$token->[2];
1062: } elsif ($token->[0] eq 'S') {
1063: if ( $token->[1] =~ /^\Q$tag\E$/i) {
1064: $$pars[-1]->unget_token($token); last;
1065: } else {
1066: $result.=$token->[4];
1067: }
1068: if ($token->[1] =~ /^LONCAPA_INTERNAL_TURN_STYLE_ON$/) { $Apache::lonxml::usestyle=1; }
1069: if ($token->[1] =~ /^LONCAPA_INTERNAL_TURN_STYLE_OFF$/) { $Apache::lonxml::usestyle=0; }
1070: } elsif ($token->[0] eq 'E') {
1071: $result.=$token->[2];
1072: }
1073: }
1074: if (($#$pars > 0) ) {
1075: pop(@$pars);
1076: pop(@Apache::lonxml::pwd);
1077: } else { last; }
1078: }
1079: }
1080: #&Apache::lonxml::debug("Exit:$result:");
1081: return $result
1082: }
1083:
1084: sub newparser {
1085: my ($parser,$contentref,$dir) = @_;
1086: push (@$parser,HTML::LCParser->new($contentref));
1087: $$parser[-1]->xml_mode(1);
1088: $$parser[-1]->marked_sections(1);
1089: if ( $dir eq '' ) {
1090: push (@Apache::lonxml::pwd, $Apache::lonxml::pwd[$#Apache::lonxml::pwd]);
1091: } else {
1092: push (@Apache::lonxml::pwd, $dir);
1093: }
1094: }
1095:
1096: sub parstring {
1097: my ($token) = @_;
1098: my $temp='';
1099: foreach (@{$token->[3]}) {
1100: unless ($_=~/\W/) {
1101: my $val=$token->[2]->{$_};
1102: $val =~ s/([\%\@\\\"\'])/\\$1/g;
1103: $val =~ s/(\$[^{a-zA-Z_])/\\$1/g;
1104: $val =~ s/(\$)$/\\$1/;
1105: #if ($val =~ m/^[\%\@]/) { $val="\\".$val; }
1106: $temp .= "my \$$_=\"$val\";";
1107: }
1108: }
1109: return $temp;
1110: }
1111:
1112: sub writeallows {
1113: unless ($#extlinks>=0) { return; }
1114: my $thisurl = &Apache::lonnet::clutter(shift);
1115: if ($env{'httpref.'.$thisurl}) {
1116: $thisurl=$env{'httpref.'.$thisurl};
1117: }
1118: my $thisdir=$thisurl;
1119: $thisdir=~s/\/[^\/]+$//;
1120: my %httpref=();
1121: foreach (@extlinks) {
1122: $httpref{'httpref.'.
1123: &Apache::lonnet::hreflocation($thisdir,$_)}=$thisurl;
1124: }
1125: @extlinks=();
1126: &Apache::lonnet::appenv(%httpref);
1127: }
1128:
1129: sub register_ssi {
1130: my ($url,%form)=@_;
1131: push (@Apache::lonxml::ssi_info,{'url'=>$url,'form'=>\%form});
1132: return '';
1133: }
1134:
1135: sub do_registered_ssi {
1136: foreach my $info (@Apache::lonxml::ssi_info) {
1137: my %form=%{ $info->{'form'}};
1138: my $url=$info->{'url'};
1139: &Apache::lonnet::ssi($url,%form);
1140: }
1141: }
1142: #
1143: # Afterburner handles anchors, highlights and links
1144: #
1145: sub afterburn {
1146: my $result=shift;
1147: &Apache::loncommon::get_unprocessed_cgi($ENV{'QUERY_STRING'},
1148: ['highlight','anchor','link']);
1149: if ($env{'form.highlight'}) {
1150: foreach (split(/\,/,$env{'form.highlight'})) {
1151: my $anchorname=$_;
1152: my $matchthis=$anchorname;
1153: $matchthis=~s/\_+/\\s\+/g;
1154: $result=~s/(\Q$matchthis\E)/\<font color=\"red\"\>$1\<\/font\>/gs;
1155: }
1156: }
1157: if ($env{'form.link'}) {
1158: foreach (split(/\,/,$env{'form.link'})) {
1159: my ($anchorname,$linkurl)=split(/\>/,$_);
1160: my $matchthis=$anchorname;
1161: $matchthis=~s/\_+/\\s\+/g;
1162: $result=~s/(\Q$matchthis\E)/\<a href=\"$linkurl\"\>$1\<\/a\>/gs;
1163: }
1164: }
1165: if ($env{'form.anchor'}) {
1166: my $anchorname=$env{'form.anchor'};
1167: my $matchthis=$anchorname;
1168: $matchthis=~s/\_+/\\s\+/g;
1169: $result=~s/(\Q$matchthis\E)/\<a name=\"$anchorname\"\>$1\<\/a\>/s;
1170: $result.=(<<"ENDSCRIPT");
1171: <script type="text/javascript">
1172: document.location.hash='$anchorname';
1173: </script>
1174: ENDSCRIPT
1175: }
1176: return $result;
1177: }
1178:
1179: sub storefile {
1180: my ($file,$contents)=@_;
1181: &Apache::lonnet::correct_line_ends(\$contents);
1182: if (my $fh=Apache::File->new('>'.$file)) {
1183: print $fh $contents;
1184: $fh->close();
1185: return 1;
1186: } else {
1187: &warning("Unable to save file $file");
1188: return 0;
1189: }
1190: }
1191:
1192: sub createnewhtml {
1193: my $title=&mt('Title of document goes here');
1194: my $body=&mt('Body of document goes here');
1195: my $filecontents=(<<SIMPLECONTENT);
1196: <html>
1197: <head>
1198: <title>$title</title>
1199: </head>
1200: <body bgcolor="#FFFFFF">
1201: $body
1202: </body>
1203: </html>
1204: SIMPLECONTENT
1205: return $filecontents;
1206: }
1207:
1208: sub createnewsty {
1209: my $filecontents=(<<SIMPLECONTENT);
1210: <definetag name="">
1211: <render>
1212: <web></web>
1213: <tex></tex>
1214: </render>
1215: </definetag>
1216: SIMPLECONTENT
1217: return $filecontents;
1218: }
1219:
1220:
1221: sub inserteditinfo {
1222: my ($result,$filecontents,$filetype)=@_;
1223: $filecontents = &HTML::Entities::encode($filecontents,'<>&"');
1224: # my $editheader='<a href="#editsection">Edit below</a><hr />';
1225: my $xml_help = '';
1226: my $initialize='';
1227: if ($filetype eq 'html') {
1228: my $addbuttons=&Apache::lonhtmlcommon::htmlareaaddbuttons();
1229: $initialize=&Apache::lonhtmlcommon::htmlareaheaders().
1230: &Apache::lonhtmlcommon::spellheader();
1231: if (!&Apache::lonhtmlcommon::htmlareablocked() &&
1232: &Apache::lonhtmlcommon::htmlareabrowser()) {
1233: $initialize.=(<<FULLPAGE);
1234: <script type="text/javascript">
1235: $addbuttons
1236:
1237: HTMLArea.loadPlugin("FullPage");
1238:
1239: function initDocument() {
1240: var editor=new HTMLArea("filecont",config);
1241: editor.registerPlugin(FullPage);
1242: editor.generate();
1243: }
1244: </script>
1245: FULLPAGE
1246: } else {
1247: $initialize.=(<<FULLPAGE);
1248: <script type="text/javascript">
1249: $addbuttons
1250: function initDocument() {
1251: }
1252: </script>
1253: FULLPAGE
1254: }
1255: $result=~s/\<body([^\>]*)\>/\<body onload="initDocument()" $1\>/i;
1256: $xml_help=&Apache::loncommon::helpLatexCheatsheet();
1257: }
1258: my $cleanbut = '';
1259:
1260: my $titledisplay=&display_title();
1261: my %lt=&Apache::lonlocal::texthash('st' => 'Save this',
1262: 'vi' => 'View',
1263: 'ed' => 'Edit');
1264: my $buttons=(<<BUTTONS);
1265: $cleanbut
1266: <input type="submit" name="savethisfile" accesskey="s" value="$lt{'st'}" />
1267: <input type="submit" name="viewmode" accesskey="v" value="$lt{'vi'}" />
1268: BUTTONS
1269: $buttons.=&Apache::lonhtmlcommon::spelllink('xmledit','filecont');
1270: $buttons.=&Apache::lonhtmlcommon::htmlareaselectactive('filecont');
1271: my $editfooter=(<<ENDFOOTER);
1272: $initialize
1273: <hr />
1274: <a name="editsection" />
1275: <form method="post" name="xmledit">
1276: $xml_help
1277: <input type="hidden" name="editmode" value="$lt{'ed'}" />
1278: $buttons<br />
1279: <textarea style="width:100%" cols="80" rows="44" name="filecont" id="filecont">$filecontents</textarea>
1280: <br />$buttons
1281: <br />
1282: </form>
1283: $titledisplay
1284: </body>
1285: ENDFOOTER
1286: # $result=~s/(\<body[^\>]*\>)/$1$editheader/is;
1287: $result=~s/(\<\/body\>)/$editfooter/is;
1288: return $result;
1289: }
1290:
1291: sub get_target {
1292: my $viewgrades=&Apache::lonnet::allowed('vgr',$env{'request.course.id'});
1293: if ( $env{'request.state'} eq 'published') {
1294: if ( defined($env{'form.grade_target'})
1295: && ($viewgrades == 'F' )) {
1296: return ($env{'form.grade_target'});
1297: } elsif (defined($env{'form.grade_target'})) {
1298: if (($env{'form.grade_target'} eq 'web') ||
1299: ($env{'form.grade_target'} eq 'tex') ) {
1300: return $env{'form.grade_target'}
1301: } else {
1302: return 'web';
1303: }
1304: } else {
1305: return 'web';
1306: }
1307: } elsif ($env{'request.state'} eq 'construct') {
1308: if ( defined($env{'form.grade_target'})) {
1309: return ($env{'form.grade_target'});
1310: } else {
1311: return 'web';
1312: }
1313: } else {
1314: return 'web';
1315: }
1316: }
1317:
1318: sub handler {
1319: my $request=shift;
1320:
1321: my $target=&get_target();
1322:
1323: $Apache::lonxml::debug=$env{'user.debug'};
1324:
1325: &Apache::loncommon::content_type($request,'text/html');
1326: &Apache::loncommon::no_cache($request);
1327: if ($env{'request.state'} eq 'published') {
1328: $request->set_last_modified(&Apache::lonnet::metadata($request->uri,
1329: 'lastrevisiondate'));
1330: }
1331: $request->send_http_header;
1332:
1333: return OK if $request->header_only;
1334:
1335:
1336: my $file=&Apache::lonnet::filelocation("",$request->uri);
1337: my $filetype;
1338: if ($file =~ /\.sty$/) {
1339: $filetype='sty';
1340: } else {
1341: $filetype='html';
1342: }
1343: #
1344: # Edit action? Save file.
1345: #
1346: unless ($env{'request.state'} eq 'published') {
1347: if ($env{'form.savethisfile'}) {
1348: if (&storefile($file,$env{'form.filecont'})) {
1349: &Apache::lonxml::info("<font COLOR=\"#0000FF\">".
1350: &mt('Updated').": ".
1351: &Apache::lonlocal::locallocaltime(time).
1352: " </font>");
1353: }
1354: }
1355: }
1356: my %mystyle;
1357: my $result = '';
1358: my $filecontents=&Apache::lonnet::getfile($file);
1359: if ($filecontents eq -1) {
1360: my $bodytag=&Apache::loncommon::bodytag('File Error');
1361: my $fnf=&mt('File not found');
1362: $result=(<<ENDNOTFOUND);
1363: <html>
1364: <head>
1365: <title>$fnf</title>
1366: </head>
1367: $bodytag
1368: <b>$fnf: $file</b>
1369: </body>
1370: </html>
1371: ENDNOTFOUND
1372: $filecontents='';
1373: if ($env{'request.state'} ne 'published') {
1374: if ($filetype eq 'sty') {
1375: $filecontents=&createnewsty();
1376: } else {
1377: $filecontents=&createnewhtml();
1378: }
1379: $env{'form.editmode'}='Edit'; #force edit mode
1380: }
1381: } else {
1382: unless ($env{'request.state'} eq 'published') {
1383: if ($filecontents=~/BEGIN LON-CAPA Internal/) {
1384: &Apache::lonxml::error(&mt('This file appears to be a rendering of a LON-CAPA resource. If this is correct, this resource will act very oddly and incorrectly.'));
1385: }
1386: #
1387: # we are in construction space, see if edit mode forced
1388: &Apache::loncommon::get_unprocessed_cgi
1389: ($ENV{'QUERY_STRING'},['editmode']);
1390: }
1391: if (!$env{'form.editmode'} || $env{'form.viewmode'}) {
1392: $result = &Apache::lonxml::xmlparse($request,$target,$filecontents,
1393: '',%mystyle);
1394: undef($Apache::lonhomework::parsing_a_task);
1395: }
1396: }
1397:
1398: #
1399: # Edit action? Insert editing commands
1400: #
1401: unless ($env{'request.state'} eq 'published') {
1402: if ($env{'form.editmode'} && (!($env{'form.viewmode'}))) {
1403: my $displayfile=$request->uri;
1404: $displayfile=~s/^\/[^\/]*//;
1405: my $bodytag='<body bgcolor="#FFFFFF">';
1406: if ($env{'environment.remote'} eq 'off') {
1407: $bodytag=&Apache::loncommon::bodytag();
1408: }
1409: $result='<html>'.$bodytag.
1410: &Apache::lonxml::message_location().'<h3>'.
1411: $displayfile.
1412: '</h3></body></html>';
1413: $result=&inserteditinfo($result,$filecontents,$filetype);
1414: }
1415: }
1416: if ($filetype eq 'html') { writeallows($request->uri); }
1417:
1418:
1419: &Apache::lonxml::add_messages(\$result);
1420: $request->print($result);
1421:
1422: return OK;
1423: }
1424:
1425: sub display_title {
1426: my $result;
1427: if ($env{'request.state'} eq 'construct') {
1428: my $title=&Apache::lonnet::gettitle();
1429: if (!defined($title) || $title eq '') {
1430: $title = $env{'request.filename'};
1431: $title = substr($title, rindex($title, '/') + 1);
1432: }
1433: $result = "<script type='text/javascript'>top.document.title = '$title - LON-CAPA Construction Space';</script>";
1434: }
1435: return $result;
1436: }
1437:
1438: sub debug {
1439: if ($Apache::lonxml::debug eq "1") {
1440: $|=1;
1441: my $request=$Apache::lonxml::request;
1442: if (!$request) { $request=Apache->request; }
1443: $request->print('<font size="-2"><pre>DEBUG:'.&HTML::Entities::encode($_[0],'<>&"')."</pre></font>\n");
1444: #&Apache::lonnet::logthis($_[0]);
1445: }
1446: }
1447:
1448: sub show_error_warn_msg {
1449: if ($env{'request.filename'} eq '/home/httpd/html/res/lib/templates/simpleproblem.problem' &&
1450: &Apache::lonnet::allowed('mdc',$env{'request.course.id'})) {
1451: return 1;
1452: }
1453: return (($Apache::lonxml::debug eq 1) ||
1454: ($env{'request.state'} eq 'construct') ||
1455: ($Apache::lonhomework::browse eq 'F'
1456: &&
1457: $env{'form.show_errors'} eq 'on'));
1458: }
1459:
1460: sub error {
1461: $errorcount++;
1462: if ( &show_error_warn_msg() ) {
1463: # If printing in construction space, put the error inside <pre></pre>
1464: push(@Apache::lonxml::error_messages,
1465: $Apache::lonxml::warnings_error_header.
1466: "<b>ERROR:</b>".join("<br />\n",@_)."<br />\n");
1467: $Apache::lonxml::warnings_error_header='';
1468: } else {
1469: my $errormsg;
1470: my ($symb)=&Apache::lonnet::symbread();
1471: if ( !$symb ) {
1472: #public or browsers
1473: $errormsg=&mt("An error occured while processing this resource. The author has been notified.");
1474: }
1475: #notify author
1476: &Apache::lonmsg::author_res_msg($env{'request.filename'},join('<br />',@_));
1477: #notify course
1478: if ( $symb && $env{'request.course.id'} ) {
1479: my $cnum=$env{'course.'.$env{'request.course.id'}.'.num'};
1480: my $cdom=$env{'course.'.$env{'request.course.id'}.'.domain'};
1481: my (undef,%users)=&Apache::lonfeedback::decide_receiver(undef,0,1,1,1);
1482: my $declutter=&Apache::lonnet::declutter($env{'request.filename'});
1483: my @userlist;
1484: foreach (keys %users) {
1485: my ($user,$domain) = split(/:/, $_);
1486: push(@userlist,"$user\@$domain");
1487: my $key=$declutter.'_'.$user.'_'.$domain;
1488: my %lastnotified=&Apache::lonnet::get('nohist_xmlerrornotifications',
1489: [$key],
1490: $cdom,$cnum);
1491: my $now=time;
1492: if ($now-$lastnotified{$key}>86400) {
1493: &Apache::lonmsg::user_normal_msg($user,$domain,
1494: "Error [$declutter]",join('<br />',@_));
1495: &Apache::lonnet::put('nohist_xmlerrornotifications',
1496: {$key => $now},
1497: $cdom,$cnum);
1498: }
1499: }
1500: if ($env{'request.role.adv'}) {
1501: $errormsg=&mt("An error occured while processing this resource. The course personnel ([_1]) and the author have been notified.",join(', ',@userlist));
1502: } else {
1503: $errormsg=&mt("An error occured while processing this resource. The instructor has been notified.");
1504: }
1505: }
1506: push(@Apache::lonxml::error_messages,"<b>$errormsg</b> <br />");
1507: }
1508: }
1509:
1510: sub warning {
1511: $warningcount++;
1512:
1513: if ($env{'form.grade_target'} ne 'tex') {
1514: if ( &show_error_warn_msg() ) {
1515: push(@Apache::lonxml::warning_messages,
1516: $Apache::lonxml::warnings_error_header.
1517: "<b>W</b>ARNING<b>:</b>".join('<br />',@_)."<br />\n");
1518: $Apache::lonxml::warnings_error_header='';
1519: }
1520: }
1521: }
1522:
1523: sub info {
1524: if ($env{'form.grade_target'} ne 'tex'
1525: && $env{'request.state'} eq 'construct') {
1526: push(@Apache::lonxml::info_messages,join('<br />',@_)."<br />\n");
1527: }
1528: }
1529:
1530: sub message_location {
1531: return '__LONCAPA_INTERNAL_MESSAGE_LOCATION__';
1532: }
1533:
1534: sub add_messages {
1535: my ($msg)=@_;
1536: my $result=join(' ',
1537: @Apache::lonxml::info_messages,
1538: @Apache::lonxml::error_messages,
1539: @Apache::lonxml::warning_messages);
1540: undef(@Apache::lonxml::info_messages);
1541: undef(@Apache::lonxml::error_messages);
1542: undef(@Apache::lonxml::warning_messages);
1543: $$msg=~s/__LONCAPA_INTERNAL_MESSAGE_LOCATION__/$result/;
1544: $$msg=~s/__LONCAPA_INTERNAL_MESSAGE_LOCATION__//g;
1545: }
1546:
1547: sub get_param {
1548: my ($param,$parstack,$safeeval,$context,$case_insensitive) = @_;
1549: if ( ! $context ) { $context = -1; }
1550: my $args ='';
1551: if ( $#$parstack > (-2-$context) ) { $args=$$parstack[$context]; }
1552: if ( ! $Apache::lonxml::usestyle ) {
1553: $args=$Apache::lonxml::style_values.$args;
1554: }
1555: if ( ! $args ) { return undef; }
1556: if ( $case_insensitive ) {
1557: if ($args =~ s/(my \$)(\Q$param\E)(=\")/$1.lc($2).$3/ei) {
1558: return &Apache::run::run("{$args;".'return $'.$param.'}',
1559: $safeeval); #'
1560: } else {
1561: return undef;
1562: }
1563: } else {
1564: if ( $args =~ /my \$\Q$param\E=\"/ ) {
1565: return &Apache::run::run("{$args;".'return $'.$param.'}',
1566: $safeeval); #'
1567: } else {
1568: return undef;
1569: }
1570: }
1571: }
1572:
1573: sub get_param_var {
1574: my ($param,$parstack,$safeeval,$context,$case_insensitive) = @_;
1575: if ( ! $context ) { $context = -1; }
1576: my $args ='';
1577: if ( $#$parstack > (-2-$context) ) { $args=$$parstack[$context]; }
1578: if ( ! $Apache::lonxml::usestyle ) {
1579: $args=$Apache::lonxml::style_values.$args;
1580: }
1581: &Apache::lonxml::debug("Args are $args param is $param");
1582: if ($case_insensitive) {
1583: if (! ($args=~s/(my \$)(\Q$param\E)(=\")/$1.lc($2).$3/ei)) {
1584: return undef;
1585: }
1586: } elsif ( $args !~ /my \$\Q$param\E=\"/ ) { return undef; }
1587: my $value=&Apache::run::run("{$args;".'return $'.$param.'}',$safeeval); #'
1588: &Apache::lonxml::debug("first run is $value");
1589: if ($value =~ /^[\$\@\%][a-zA-Z_]\w*$/) {
1590: &Apache::lonxml::debug("doing second");
1591: my @result=&Apache::run::run("return $value",$safeeval,1);
1592: if (!defined($result[0])) {
1593: return $value
1594: } else {
1595: if (wantarray) { return @result; } else { return $result[0]; }
1596: }
1597: } else {
1598: return $value;
1599: }
1600: }
1601:
1602: sub register_insert {
1603: my @data = split /\n/, &Apache::lonnet::getfile('/home/httpd/lonTabs/insertlist.tab');
1604: my $i;
1605: my $tagnum=0;
1606: my @order;
1607: for ($i=0;$i < $#data; $i++) {
1608: my $line = $data[$i];
1609: if ( $line =~ /^\#/ || $line =~ /^\s*\n/) { next; }
1610: if ( $line =~ /TABLE/ ) { last; }
1611: my ($tag,$descrip,$color,$function,$show,$helpfile,$helpdesc) = split(/,/, $line);
1612: if ($tag) {
1613: $insertlist{"$tagnum.tag"} = $tag;
1614: $insertlist{"$tagnum.description"} = $descrip;
1615: $insertlist{"$tagnum.color"} = $color;
1616: $insertlist{"$tagnum.function"} = $function;
1617: if (!defined($show)) { $show='yes'; }
1618: $insertlist{"$tagnum.show"}= $show;
1619: $insertlist{"$tagnum.helpfile"} = $helpfile;
1620: $insertlist{"$tagnum.helpdesc"} = $helpdesc;
1621: $insertlist{"$tag.num"}=$tagnum;
1622: $tagnum++;
1623: }
1624: }
1625: $i++; #skipping TABLE line
1626: $tagnum = 0;
1627: for (;$i < $#data;$i++) {
1628: my $line = $data[$i];
1629: my ($mnemonic,@which) = split(/ +/,$line);
1630: my $tag = $insertlist{"$tagnum.tag"};
1631: for (my $j=0;$j <=$#which;$j++) {
1632: if ( $which[$j] eq 'Y' ) {
1633: if ($insertlist{"$j.show"} ne 'no') {
1634: push(@{ $insertlist{"$tag.which"} },$j);
1635: }
1636: }
1637: }
1638: $tagnum++;
1639: }
1640: }
1641:
1642: sub description {
1643: my ($token)=@_;
1644: my $tagnum;
1645: my $tag=$token->[1];
1646: foreach my $namespace (reverse @Apache::lonxml::namespace) {
1647: my $testtag=$namespace.'::'.$tag;
1648: $tagnum=$insertlist{"$testtag.num"};
1649: if (defined($tagnum)) { last; }
1650: }
1651: if (!defined ($tagnum)) { $tagnum=$Apache::lonxml::insertlist{"$tag.num"}; }
1652: return $insertlist{$tagnum.'.description'};
1653: }
1654:
1655: # Returns a list containing the help file, and the description
1656: sub helpinfo {
1657: my ($token)=@_;
1658: my $tagnum;
1659: my $tag=$token->[1];
1660: foreach my $namespace (reverse @Apache::lonxml::namespace) {
1661: my $testtag=$namespace.'::'.$tag;
1662: $tagnum=$insertlist{"$testtag.num"};
1663: if (defined($tagnum)) { last; }
1664: }
1665: if (!defined ($tagnum)) { $tagnum=$Apache::lonxml::insertlist{"$tag.num"}; }
1666: return ($insertlist{$tagnum.'.helpfile'}, $insertlist{$tagnum.'.helpdesc'});
1667: }
1668:
1669: # ----------------------------------------------------------------- whichuser
1670: # returns a list of $symb, $courseid, $domain, $name that is correct for
1671: # calls to lonnet functions for this setup.
1672: # - looks for form.grade_ parameters
1673: sub whichuser {
1674: my ($passedsymb)=@_;
1675: my ($symb,$courseid,$domain,$name,$publicuser);
1676: if (defined($env{'form.grade_symb'})) {
1677: my ($tmp_courseid)=
1678: &Apache::loncommon::get_env_multiple('form.grade_courseid');
1679: my $allowed=&Apache::lonnet::allowed('vgr',$tmp_courseid);
1680: if (!$allowed &&
1681: exists($env{'request.course.sec'}) &&
1682: $env{'request.course.sec'} !~ /^\s*$/) {
1683: $allowed=&Apache::lonnet::allowed('vgr',$tmp_courseid.
1684: '/'.$env{'request.course.sec'});
1685: }
1686: if ($allowed) {
1687: ($symb)=&Apache::loncommon::get_env_multiple('form.grade_symb');
1688: $courseid=$tmp_courseid;
1689: ($domain)=&Apache::loncommon::get_env_multiple('form.grade_domain');
1690: ($name)=&Apache::loncommon::get_env_multiple('form.grade_username');
1691: return ($symb,$courseid,$domain,$name,$publicuser);
1692: }
1693: }
1694: if (!$passedsymb) {
1695: $symb=&Apache::lonnet::symbread();
1696: } else {
1697: $symb=$passedsymb;
1698: }
1699: $courseid=$env{'request.course.id'};
1700: $domain=$env{'user.domain'};
1701: $name=$env{'user.name'};
1702: if ($name eq 'public' && $domain eq 'public') {
1703: if (!defined($env{'form.username'})) {
1704: $env{'form.username'}.=time.rand(10000000);
1705: }
1706: $name.=$env{'form.username'};
1707: }
1708: return ($symb,$courseid,$domain,$name,$publicuser);
1709: }
1710:
1711: 1;
1712: __END__
1713:
1714:
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