1: # The LearningOnline Network with CAPA
2: # XML Parser Module
3: #
4: # $Id: lonxml.pm,v 1.141 2001/12/14 22:59:34 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: # last modified 06/26/00 by Alexander Sakharuk
40: # 11/6 Gerd Kortemeyer
41: # 6/1/1 Gerd Kortemeyer
42: # 2/21,3/13 Guy
43: # 3/29,5/4 Gerd Kortemeyer
44: # 5/10 Scott Harrison
45: # 5/26 Gerd Kortemeyer
46: # 5/27 H. K. Ng
47: # 6/2,6/3,6/8,6/9 Gerd Kortemeyer
48: # 6/12,6/13 H. K. Ng
49: # 6/16 Gerd Kortemeyer
50: # 7/27 H. K. Ng
51: # 8/7,8/9,8/10,8/11,8/15,8/16,8/17,8/18,8/20,8/23,8/24 Gerd Kortemeyer
52: # Guy Albertelli
53: # 9/26 Gerd Kortemeyer
54:
55:
56: package Apache::lonxml;
57: use vars
58: qw(@pwd @outputstack $redirection $import @extlinks $metamode $evaluate %insertlist @namespace);
59: use strict;
60: use HTML::TokeParser;
61: use HTML::TreeBuilder;
62: use Safe;
63: use Safe::Hole;
64: use Math::Cephes qw(:trigs :hypers :bessels erf erfc);
65: use Math::Random qw(:all);
66: use Opcode;
67:
68: sub register {
69: my ($space,@taglist) = @_;
70: foreach my $temptag (@taglist) {
71: push(@{ $Apache::lonxml::alltags{$temptag} },$space);
72: }
73: }
74:
75: sub deregister {
76: my ($space,@taglist) = @_;
77: &printalltags();
78: foreach my $temptag (@taglist) {
79: my $tempspace = $Apache::lonxml::alltags{$temptag}[-1];
80: if ($tempspace eq $space) {
81: pop(@{ $Apache::lonxml::alltags{$temptag} });
82: }
83: }
84: &printalltags();
85: }
86:
87: use Apache::Constants qw(:common);
88: use Apache::lontexconvert;
89: use Apache::style;
90: use Apache::run;
91: use Apache::londefdef;
92: use Apache::scripttag;
93: use Apache::edit;
94: use Apache::lonnet;
95: use Apache::File;
96: use Apache::loncommon;
97:
98: #================================================== Main subroutine: xmlparse
99: #debugging control, to turn on debugging modify the correct handler
100: $Apache::lonxml::debug=0;
101:
102: #path to the directory containing the file currently being processed
103: @pwd=();
104:
105: #these two are used for capturing a subset of the output for later processing,
106: #don't touch them directly use &startredirection and &endredirection
107: @outputstack = ();
108: $redirection = 0;
109:
110: #controls wheter the <import> tag actually does
111: $import = 1;
112: @extlinks=();
113:
114: # meta mode is a bit weird only some output is to be turned off
115: #<output> tag turns metamode off (defined in londefdef.pm)
116: $metamode = 0;
117:
118: # turns on and of run::evaluate actually derefencing var refs
119: $evaluate = 1;
120:
121: # data structure for eidt mode, determines what tags can go into what other tags
122: %insertlist=();
123:
124: # stores the list of active tag namespaces
125: @namespace=();
126:
127: # has the dynamic menu been updated to know about this resource
128: $Apache::lonxml::registered=0;
129:
130: sub xmlbegin {
131: my $output='';
132: if ($ENV{'browser.mathml'}) {
133: $output='<?xml version="1.0"?>'
134: .'<?xml-stylesheet type="text/css" href="/adm/MathML/mathml.css"?>'
135: .'<!DOCTYPE html SYSTEM "/adm/MathML/mathml.dtd" '
136: .'[<!ENTITY mathns "http://www.w3.org/1998/Math/MathML">]>'
137: .'<html xmlns:math="http://www.w3.org/1998/Math/MathML" '
138: .'xmlns="http://www.w3.org/TR/REC-html40">';
139: } else {
140: $output='<html>';
141: }
142: return $output;
143: }
144:
145: sub xmlend {
146: my $discussion='';
147: if ($ENV{'request.course.id'}) {
148: my $crs='/'.$ENV{'request.course.id'};
149: if ($ENV{'request.course.sec'}) {
150: $crs.='_'.$ENV{'request.course.sec'};
151: }
152: $crs=~s/\_/\//g;
153: my $seeid=&Apache::lonnet::allowed('rin',$crs);
154: my $symb=&Apache::lonnet::symbread();
155: if ($symb) {
156: my %contrib=&Apache::lonnet::restore($symb,$ENV{'request.course.id'},
157: $ENV{'course.'.$ENV{'request.course.id'}.'.domain'},
158: $ENV{'course.'.$ENV{'request.course.id'}.'.num'});
159: if ($contrib{'version'}) {
160: $discussion.=
161: '<address><hr /><h2>Course Discussion of Resource</h2>';
162: my $idx;
163: for ($idx=1;$idx<=$contrib{'version'};$idx++) {
164: my $hidden=($contrib{'hidden'}=~/\.$idx\./);
165: unless (($hidden) && (!$seeid)) {
166: my $message=$contrib{$idx.':message'};
167: $message=~s/\n/\<br \/\>/g;
168: if ($message) {
169: if ($hidden) {
170: $message='<font color="#888888">'.$message.'</font>';
171: }
172: my $sender='Anonymous';
173: if ((!$contrib{$idx.':anonymous'}) || ($seeid)) {
174: $sender=$contrib{$idx.':sendername'}.' at '.
175: $contrib{$idx.':senderdomain'};
176: if ($contrib{$idx.':anonymous'}) {
177: $sender.=' (anonymous)';
178: }
179: if ($seeid) {
180: if ($hidden) {
181: $sender.=' <a href="/adm/feedback?unhide='.
182: $symb.':::'.$idx.'">Make Visible</a>';
183: } else {
184: $sender.=' <a href="/adm/feedback?hide='.
185: $symb.':::'.$idx.'">Hide</a>';
186: }
187: }
188: }
189: $discussion.='<p><b>'.$sender.'</b> ('.
190: localtime($contrib{$idx.':timestamp'}).
191: '):<blockquote>'.$message.
192: '</blockquote></p>';
193: }
194: }
195: }
196: $discussion.='</address>';
197: }
198: }
199: }
200: return $discussion.'</html>';
201: }
202:
203: sub tokeninputfield {
204: my $defhost=$Apache::lonnet::perlvar{'lonHostID'};
205: $defhost=~tr/a-z/A-Z/;
206: return (<<ENDINPUTFIELD)
207: <script>
208: function updatetoken() {
209: var comp=new Array;
210: var barcode=unescape(document.tokeninput.barcode.value);
211: comp=barcode.split('*');
212: if (typeof(comp[0])!="undefined") {
213: document.tokeninput.codeone.value=comp[0];
214: }
215: if (typeof(comp[1])!="undefined") {
216: document.tokeninput.codetwo.value=comp[1];
217: }
218: if (typeof(comp[2])!="undefined") {
219: comp[2]=comp[2].toUpperCase();
220: document.tokeninput.codethree.value=comp[2];
221: }
222: document.tokeninput.barcode.value='';
223: }
224: </script>
225: <form method="post" name="tokeninput">
226: <table border="2" bgcolor="#FFFFBB">
227: <tr><th>DocID Checkin</th></tr>
228: <tr><td>
229: <table>
230: <tr>
231: <td>Scan in Barcode</td>
232: <td><input type="text" size="22" name="barcode"
233: onChange="updatetoken()"/></td>
234: </tr>
235: <tr><td><i>or</i> Type in DocID</td>
236: <td>
237: <input type="text" size="5" name="codeone" />
238: <b><font size="+2">*</font></b>
239: <input type="text" size="5" name="codetwo" />
240: <b><font size="+2">*</font></b>
241: <input type="text" size="10" name="codethree" value="$defhost"
242: onChange="this.value=this.value.toUpperCase()" />
243: </td></tr>
244: </table>
245: </td></tr>
246: <tr><td><input type="submit" value="Check in DocID" /></td></tr>
247: </table>
248: </form>
249: ENDINPUTFIELD
250: }
251:
252: sub maketoken {
253: my ($symb,$tuname,$tudom,$tcrsid)=@_;
254: unless ($symb) {
255: $symb=&Apache::lonnet::symbread();
256: }
257: unless ($tuname) {
258: $tuname=$ENV{'user.name'};
259: $tudom=$ENV{'user.domain'};
260: $tcrsid=$ENV{'request.course.id'};
261: }
262:
263: return &Apache::lonnet::checkout($symb,$tuname,$tudom,$tcrsid);
264: }
265:
266: sub printtokenheader {
267: my ($target,$token,$tsymb,$tcrsid,$tudom,$tuname)=@_;
268: unless ($token) { return ''; }
269:
270: my ($symb,$courseid,$domain,$name) = &Apache::lonxml::whichuser();
271: unless ($tsymb) {
272: $tsymb=$symb;
273: }
274: unless ($tuname) {
275: $tuname=$name;
276: $tudom=$domain;
277: $tcrsid=$courseid;
278: }
279:
280: my %reply=&Apache::lonnet::get('environment',
281: ['firstname','middlename','lastname','generation'],
282: $tudom,$tuname);
283: my $plainname=$reply{'firstname'}.' '.
284: $reply{'middlename'}.' '.
285: $reply{'lastname'}.' '.
286: $reply{'generation'};
287:
288: if ($target eq 'web') {
289: return
290: '<img align="right" src="/cgi-bin/barcode.gif?encode='.$token.'" />'.
291: 'Checked out for '.$plainname.
292: '<br />User: '.$tuname.' at '.$tudom.
293: '<br />CourseID: '.$tcrsid.
294: '<br />DocID: '.$token.
295: '<br />Time: '.localtime().'<hr />';
296: } else {
297: return $token;
298: }
299: }
300:
301: sub fontsettings() {
302: my $headerstring='';
303: if (($ENV{'browser.os'} eq 'mac') && (!$ENV{'browser.mathml'})) {
304: $headerstring.=
305: '<meta Content-Type="text/html; charset=x-mac-roman">';
306: }
307: return $headerstring;
308: }
309:
310: sub registerurl {
311: my $forcereg=shift;
312: if ($ENV{'request.publicaccess'}) {
313: return
314: '<script>function LONCAPAreg(){} function LONCAPAstale(){}</script>';
315: }
316: if ($Apache::lonxml::registered && !$forcereg) { return ''; }
317: $Apache::lonxml::registered=1;
318: if (($ENV{'REQUEST_URI'}!~/^\/(res\/)*adm\//) || ($forcereg)) {
319: my $hwkadd='';
320: if ($ENV{'REQUEST_URI'}=~/\.(problem|exam|quiz|assess|survey|form)$/) {
321: if (&Apache::lonnet::allowed('vgr',$ENV{'request.course.id'})) {
322: $hwkadd.=(<<ENDSUBM);
323: menu.switchbutton
324: (7,1,'subm.gif','view sub','missions',
325: 'gocmd("/adm/grades","submission")');
326: ENDSUBM
327: }
328: if (&Apache::lonnet::allowed('mgr',$ENV{'request.course.id'})) {
329: $hwkadd.=(<<ENDGRDS);
330: menu.switchbutton
331: (7,2,'pgrd.gif','problem','grades',
332: 'gocmd("/adm/grades","viewgrades")');
333: ENDGRDS
334: }
335: if (&Apache::lonnet::allowed('opa',$ENV{'request.course.id'})) {
336: $hwkadd.=(<<ENDPARM);
337: menu.switchbutton
338: (7,3,'pparm.gif','problem','parms',
339: 'gocmd("/adm/parmset","set")');
340: ENDPARM
341: }
342: }
343: return (<<ENDREGTHIS);
344:
345: <script language="JavaScript">
346: // BEGIN LON-CAPA Internal
347:
348: function LONCAPAreg() {
349: menu=window.open("","LONCAPAmenu");
350: menu.clearTimeout(menu.menucltim);
351: menu.currentURL=window.location.pathname;
352: menu.currentStale=0;
353: menu.clearbut(3,1);
354: menu.switchbutton
355: (6,3,'catalog.gif','catalog','info','catalog_info()');
356: menu.switchbutton
357: (8,1,'eval.gif','evaluate','this','gopost("/adm/evaluate",currentURL)');
358: menu.switchbutton
359: (8,2,'fdbk.gif','feedback','on this','gopost("/adm/feedback",currentURL)');
360: menu.switchbutton
361: (8,3,'prt.gif','prepare','printout','gopost("/adm/printout",currentURL)');
362: menu.switchbutton
363: (2,1,'back.gif','backward','','gopost("/adm/flip","back:"+currentURL)');
364: menu.switchbutton
365: (2,3,'forw.gif','forward','','gopost("/adm/flip","forward:"+currentURL)');
366: menu.switchbutton
367: (9,1,'sbkm.gif','set','bookmark','set_bookmark()');
368: menu.switchbutton
369: (9,2,'vbkm.gif','view','bookmark','edit_bookmarks()');
370: menu.switchbutton
371: (9,3,'anot.gif','anno-','tations','annotate()');
372: $hwkadd
373: }
374:
375: function LONCAPAstale() {
376: menu=window.open("","LONCAPAmenu");
377: menu.currentStale=1;
378: menu.switchbutton
379: (3,1,'reload.gif','return','location','go(currentURL)');
380: menu.clearbut(7,1);
381: menu.clearbut(7,2);
382: menu.clearbut(7,3);
383: menu.menucltim=menu.setTimeout(
384: 'clearbut(2,1);clearbut(2,3);clearbut(8,1);clearbut(8,2);clearbut(8,3);'+
385: 'clearbut(9,1);clearbut(9,2);clearbut(9,3);clearbut(6,3)',
386: 2000);
387:
388: }
389:
390: // END LON-CAPA Internal
391: </script>
392: ENDREGTHIS
393:
394: } else {
395: return (<<ENDDONOTREGTHIS);
396:
397: <script language="JavaScript">
398: // BEGIN LON-CAPA Internal
399:
400: function LONCAPAreg() {
401: menu=window.open("","LONCAPAmenu");
402: menu.currentStale=1;
403: menu.clearbut(2,1);
404: menu.clearbut(2,3);
405: menu.clearbut(8,1);
406: menu.clearbut(8,2);
407: menu.clearbut(8,3);
408: if (menu.currentURL) {
409: menu.switchbutton
410: (3,1,'reload.gif','return','location','go(currentURL)');
411: } else {
412: menu.clearbut(3,1);
413: }
414: }
415:
416: function LONCAPAstale() {
417: }
418:
419: // END LON-CAPA Internal
420: </script>
421: ENDDONOTREGTHIS
422:
423: }
424: }
425:
426: sub loadevents() {
427: return 'LONCAPAreg();';
428: }
429:
430: sub unloadevents() {
431: return 'LONCAPAstale();';
432: }
433:
434: sub printalltags {
435: my $temp;
436: foreach $temp (sort keys %Apache::lonxml::alltags) {
437: &Apache::lonxml::debug("$temp -- ".
438: join(',',@{ $Apache::lonxml::alltags{$temp} }));
439: }
440: }
441:
442: sub xmlparse {
443: my ($target,$content_file_string,$safeinit,%style_for_target) = @_;
444:
445: &setup_globals($target);
446: #&printalltags();
447: my @pars = ();
448: my $pwd=$ENV{'request.filename'};
449: $pwd =~ s:/[^/]*$::;
450: &newparser(\@pars,\$content_file_string,$pwd);
451:
452: my $safeeval = new Safe;
453: my $safehole = new Safe::Hole;
454: &init_safespace($target,$safeeval,$safehole,$safeinit);
455: #-------------------- Redefinition of the target in the case of compound target
456:
457: ($target, my @tenta) = split('&&',$target);
458:
459: my @stack = ();
460: my @parstack = ();
461: &initdepth;
462:
463: my $finaloutput = &inner_xmlparse($target,\@stack,\@parstack,\@pars,
464: $safeeval,\%style_for_target);
465: if ($ENV{'request.uri'}) {
466: &writeallows($ENV{'request.uri'});
467: }
468: return $finaloutput;
469: }
470:
471: sub htmlclean {
472: my ($raw,$full)=@_;
473:
474: my $tree = HTML::TreeBuilder->new;
475: $tree->ignore_unknown(0);
476:
477: $tree->parse($raw);
478:
479: my $output= $tree->as_HTML(undef,' ');
480:
481: $output=~s/\<(br|hr|img|meta|allow)([^\>\/]*)\>/\<$1$2 \/\>/gis;
482: $output=~s/\<\/(br|hr|img|meta|allow)\>//gis;
483: unless ($full) {
484: $output=~s/\<[\/]*(body|head|html)\>//gis;
485: }
486:
487: $tree = $tree->delete;
488:
489: return $output;
490: }
491:
492: sub inner_xmlparse {
493: my ($target,$stack,$parstack,$pars,$safeeval,$style_for_target)=@_;
494: my $finaloutput = '';
495: my $result;
496: my $token;
497: while ( $#$pars > -1 ) {
498: while ($token = $$pars['-1']->get_token) {
499: if (($token->[0] eq 'T') || ($token->[0] eq 'C') || ($token->[0] eq 'D') ) {
500: if ($metamode<1) {
501: $result=$token->[1];
502: }
503: } elsif ($token->[0] eq 'PI') {
504: if ($metamode<1) {
505: $result=$token->[2];
506: }
507: } elsif ($token->[0] eq 'S') {
508: # add tag to stack
509: push (@$stack,$token->[1]);
510: # add parameters list to another stack
511: push (@$parstack,&parstring($token));
512: &increasedepth($token);
513: if (exists $$style_for_target{$token->[1]}) {
514: if ($Apache::lonxml::redirection) {
515: $Apache::lonxml::outputstack['-1'] .=
516: &recurse($$style_for_target{$token->[1]},$target,$safeeval,
517: $style_for_target,@$parstack);
518: } else {
519: $finaloutput .= &recurse($$style_for_target{$token->[1]},$target,
520: $safeeval,$style_for_target,@$parstack);
521: }
522: } else {
523: $result = &callsub("start_$token->[1]", $target, $token, $stack,
524: $parstack, $pars, $safeeval, $style_for_target);
525: }
526: } elsif ($token->[0] eq 'E') {
527: #clear out any tags that didn't end
528: while ($token->[1] ne $$stack['-1'] && ($#$stack > -1)) {
529: &Apache::lonxml::warning('Missing tag </'.$$stack['-1'].'> in file');
530: &end_tag($stack,$parstack,$token);
531: }
532:
533: if (exists($$style_for_target{'/'."$token->[1]"})) {
534: if ($Apache::lonxml::redirection) {
535: $Apache::lonxml::outputstack['-1'] .=
536: &recurse($$style_for_target{'/'."$token->[1]"},
537: $target,$safeeval,$style_for_target,@$parstack);
538: } else {
539: $finaloutput .= &recurse($$style_for_target{'/'."$token->[1]"},
540: $target,$safeeval,$style_for_target,
541: @$parstack);
542: }
543: } else {
544: $result = &callsub("end_$token->[1]", $target, $token, $stack,
545: $parstack, $pars,$safeeval, $style_for_target);
546: }
547: } else {
548: &Apache::lonxml::error("Unknown token event :$token->[0]:$token->[1]:");
549: }
550: #evaluate variable refs in result
551: if ($result ne "") {
552: if ( $#$parstack > -1 ) {
553: if ($Apache::lonxml::redirection) {
554: $Apache::lonxml::outputstack['-1'] .=
555: &Apache::run::evaluate($result,$safeeval,$$parstack['-1']);
556: } else {
557: $finaloutput .= &Apache::run::evaluate($result,$safeeval,
558: $$parstack['-1']);
559: }
560: } else {
561: $finaloutput .= &Apache::run::evaluate($result,$safeeval,'');
562: }
563: $result = '';
564: }
565: if ($token->[0] eq 'E') {
566: &end_tag($stack,$parstack,$token);
567: }
568: }
569: pop @$pars;
570: pop @Apache::lonxml::pwd;
571: }
572:
573: # if ($target eq 'meta') {
574: # $finaloutput.=&endredirection;
575: # }
576:
577: if (($ENV{'QUERY_STRING'}) && ($target eq 'web')) {
578: $finaloutput=&afterburn($finaloutput);
579: }
580: return $finaloutput;
581: }
582:
583: sub recurse {
584: my @innerstack = ();
585: my @innerparstack = ();
586: my ($newarg,$target,$safeeval,$style_for_target,@parstack) = @_;
587: my @pat = ();
588: &newparser(\@pat,\$newarg);
589: my $tokenpat;
590: my $partstring = '';
591: my $output='';
592: my $decls='';
593: &Apache::lonxml::debug("Recursing");
594: while ( $#pat > -1 ) {
595: while ($tokenpat = $pat[$#pat]->get_token) {
596: if (($tokenpat->[0] eq 'T') || ($tokenpat->[0] eq 'C') || ($tokenpat->[0] eq 'D') ) {
597: if ($metamode<1) { $partstring=$tokenpat->[1]; }
598: } elsif ($tokenpat->[0] eq 'PI') {
599: if ($metamode<1) { $partstring=$tokenpat->[2]; }
600: } elsif ($tokenpat->[0] eq 'S') {
601: push (@innerstack,$tokenpat->[1]);
602: push (@innerparstack,&parstring($tokenpat));
603: &increasedepth($tokenpat);
604: $partstring = &callsub("start_$tokenpat->[1]", $target, $tokenpat,
605: \@innerstack, \@innerparstack, \@pat,
606: $safeeval, $style_for_target);
607: } elsif ($tokenpat->[0] eq 'E') {
608: #clear out any tags that didn't end
609: while ($tokenpat->[1] ne $innerstack[$#innerstack]
610: && ($#innerstack > -1)) {
611: &Apache::lonxml::warning('Missing tag </'.$innerstack['-1'].'> in style');
612: &end_tag(\@innerstack,\@innerparstack,$tokenpat);
613: }
614: $partstring = &callsub("end_$tokenpat->[1]", $target, $tokenpat,
615: \@innerstack, \@innerparstack, \@pat,
616: $safeeval, $style_for_target);
617: } else {
618: &Apache::lonxml::error("Unknown token event :$tokenpat->[0]:$tokenpat->[1]:");
619: }
620: #pass both the variable to the style tag, and the tag we
621: #are processing inside the <definedtag>
622: if ( $partstring ne "" ) {
623: if ( $#parstack > -1 ) {
624: if ( $#innerparstack > -1 ) {
625: $decls= $parstack[$#parstack].$innerparstack[$#innerparstack];
626: } else {
627: $decls= $parstack[$#parstack];
628: }
629: } else {
630: if ( $#innerparstack > -1 ) {
631: $decls=$innerparstack[$#innerparstack];
632: } else {
633: $decls='';
634: }
635: }
636: $output .= &Apache::run::evaluate($partstring,$safeeval,$decls);
637: $partstring = '';
638: }
639: if ($tokenpat->[0] eq 'E') { pop @innerstack;pop @innerparstack;
640: &decreasedepth($tokenpat);}
641: }
642: pop @pat;
643: pop @Apache::lonxml::pwd;
644: }
645: &Apache::lonxml::debug("Exiting Recursing");
646: return $output;
647: }
648:
649: sub callsub {
650: my ($sub,$target,$token,$tagstack,$parstack,$parser,$safeeval,$style)=@_;
651: my $currentstring='';
652: my $nodefault;
653: {
654: my $sub1;
655: no strict 'refs';
656: my $tag=$token->[1];
657: my $space=$Apache::lonxml::alltags{$tag}[-1];
658: if (!$space) {
659: $tag=~tr/A-Z/a-z/;
660: $sub=~tr/A-Z/a-z/;
661: $space=$Apache::lonxml::alltags{$tag}[-1]
662: }
663:
664: my $deleted=0;
665: $Apache::lonxml::curdepth=join('_',@Apache::lonxml::depthcounter);
666: if (($token->[0] eq 'S') && ($target eq 'modified')) {
667: $deleted=&Apache::edit::handle_delete($space,$target,$token,$tagstack,
668: $parstack,$parser,$safeeval,
669: $style);
670: }
671: if (!$deleted) {
672: if ($space) {
673: #&Apache::lonxml::debug("Calling sub $sub in $space $metamode<br />\n");
674: $sub1="$space\:\:$sub";
675: ($currentstring,$nodefault) = &$sub1($target,$token,$tagstack,
676: $parstack,$parser,$safeeval,
677: $style);
678: } else {
679: #&Apache::lonxml::debug("NOT Calling sub $sub in $space $metamode<br />\n");
680: if ($metamode <1) {
681: if (defined($token->[4]) && ($metamode < 1)) {
682: $currentstring = $token->[4];
683: } else {
684: $currentstring = $token->[2];
685: }
686: }
687: }
688: # &Apache::lonxml::debug("nodefalt:$nodefault:");
689: if ($currentstring eq '' && $nodefault eq '') {
690: if ($target eq 'edit') {
691: &Apache::lonxml::debug("doing default edit for $token->[1]");
692: if ($token->[0] eq 'S') {
693: $currentstring = &Apache::edit::tag_start($target,$token);
694: } elsif ($token->[0] eq 'E') {
695: $currentstring = &Apache::edit::tag_end($target,$token);
696: }
697: } elsif ($target eq 'modified') {
698: if ($token->[0] eq 'S') {
699: $currentstring = $token->[4];
700: $currentstring.=&Apache::edit::handle_insert();
701: } else {
702: $currentstring = $token->[2];
703: }
704: }
705: }
706: }
707: use strict 'refs';
708: }
709: return $currentstring;
710: }
711:
712: sub setup_globals {
713: my ($target)=@_;
714: $Apache::lonxml::registered = 0;
715: @Apache::lonxml::pwd=();
716: @Apache::lonxml::extlinks=();
717: if ($target eq 'meta') {
718: $Apache::lonxml::redirection = 0;
719: $Apache::lonxml::metamode = 1;
720: $Apache::lonxml::evaluate = 1;
721: $Apache::lonxml::import = 0;
722: } elsif ($target eq 'answer') {
723: $Apache::lonxml::redirection = 0;
724: $Apache::lonxml::metamode = 1;
725: $Apache::lonxml::evaluate = 1;
726: $Apache::lonxml::import = 1;
727: } elsif ($target eq 'grade') {
728: &startredirection;
729: $Apache::lonxml::metamode = 0;
730: $Apache::lonxml::evaluate = 1;
731: $Apache::lonxml::import = 1;
732: } elsif ($target eq 'modified') {
733: $Apache::lonxml::redirection = 0;
734: $Apache::lonxml::metamode = 0;
735: $Apache::lonxml::evaluate = 0;
736: $Apache::lonxml::import = 0;
737: } elsif ($target eq 'edit') {
738: $Apache::lonxml::redirection = 0;
739: $Apache::lonxml::metamode = 0;
740: $Apache::lonxml::evaluate = 0;
741: $Apache::lonxml::import = 0;
742: } else {
743: $Apache::lonxml::redirection = 0;
744: $Apache::lonxml::metamode = 0;
745: $Apache::lonxml::evaluate = 1;
746: $Apache::lonxml::import = 1;
747: }
748: }
749:
750: sub init_safespace {
751: my ($target,$safeeval,$safehole,$safeinit) = @_;
752: $safeeval->permit("entereval");
753: $safeeval->permit(":base_math");
754: $safeeval->permit("sort");
755: $safeeval->deny(":base_io");
756: $safehole->wrap(\&Apache::scripttag::xmlparse,$safeeval,'&xmlparse');
757: $safehole->wrap(\&Apache::lonnet::EXT,$safeeval,'&EXT');
758:
759: $safehole->wrap(\&Math::Cephes::asin,$safeeval,'&asin');
760: $safehole->wrap(\&Math::Cephes::acos,$safeeval,'&acos');
761: $safehole->wrap(\&Math::Cephes::atan,$safeeval,'&atan');
762: $safehole->wrap(\&Math::Cephes::sinh,$safeeval,'&sinh');
763: $safehole->wrap(\&Math::Cephes::cosh,$safeeval,'&cosh');
764: $safehole->wrap(\&Math::Cephes::tanh,$safeeval,'&tanh');
765: $safehole->wrap(\&Math::Cephes::asinh,$safeeval,'&asinh');
766: $safehole->wrap(\&Math::Cephes::acosh,$safeeval,'&acosh');
767: $safehole->wrap(\&Math::Cephes::atanh,$safeeval,'&atanh');
768: $safehole->wrap(\&Math::Cephes::erf,$safeeval,'&erf');
769: $safehole->wrap(\&Math::Cephes::erfc,$safeeval,'&erfc');
770: $safehole->wrap(\&Math::Cephes::j0,$safeeval,'&j0');
771: $safehole->wrap(\&Math::Cephes::j1,$safeeval,'&j1');
772: $safehole->wrap(\&Math::Cephes::jn,$safeeval,'&jn');
773: $safehole->wrap(\&Math::Cephes::jv,$safeeval,'&jv');
774: $safehole->wrap(\&Math::Cephes::y0,$safeeval,'&y0');
775: $safehole->wrap(\&Math::Cephes::y1,$safeeval,'&y1');
776: $safehole->wrap(\&Math::Cephes::yn,$safeeval,'&yn');
777: $safehole->wrap(\&Math::Cephes::yv,$safeeval,'&yv');
778: $safehole->wrap(\&Math::Random::random_beta,$safeeval,'&math_random_beta');
779: $safehole->wrap(\&Math::Random::random_chi_square,$safeeval,'&math_random_chi_square');
780: $safehole->wrap(\&Math::Random::random_exponential,$safeeval,'&math_random_exponential');
781: $safehole->wrap(\&Math::Random::random_f,$safeeval,'&math_random_f');
782: $safehole->wrap(\&Math::Random::random_gamma,$safeeval,'&math_random_gamma');
783: $safehole->wrap(\&Math::Random::random_multivariate_normal,$safeeval,'&math_random_multivariate_normal');
784: $safehole->wrap(\&Math::Random::random_multinomial,$safeeval,'&math_random_multinomial');
785: $safehole->wrap(\&Math::Random::random_noncentral_chi_square,$safeeval,'&math_random_noncentral_chi_square');
786: $safehole->wrap(\&Math::Random::random_noncentral_f,$safeeval,'&math_random_noncentral_f');
787: $safehole->wrap(\&Math::Random::random_normal,$safeeval,'&math_random_normal');
788: $safehole->wrap(\&Math::Random::random_permutation,$safeeval,'&math_random_permutation');
789: $safehole->wrap(\&Math::Random::random_permuted_index,$safeeval,'&math_random_permuted_index');
790: $safehole->wrap(\&Math::Random::random_uniform,$safeeval,'&math_random_uniform');
791: $safehole->wrap(\&Math::Random::random_poisson,$safeeval,'&math_random_poisson');
792: $safehole->wrap(\&Math::Random::random_uniform_integer,$safeeval,'&math_random_uniform_integer');
793: $safehole->wrap(\&Math::Random::random_negative_binomial,$safeeval,'&math_random_negative_binomial');
794: $safehole->wrap(\&Math::Random::random_binomial,$safeeval,'&math_random_binomial');
795: $safehole->wrap(\&Math::Random::random_seed_from_phrase,$safeeval,'&random_seed_from_phrase');
796: $safehole->wrap(\&Math::Random::random_set_seed_from_phrase,$safeeval,'&random_set_seed_from_phrase');
797: $safehole->wrap(\&Math::Random::random_get_seed,$safeeval,'&random_get_seed');
798: $safehole->wrap(\&Math::Random::random_set_seed,$safeeval,'&random_set_seed');
799:
800: #need to inspect this class of ops
801: # $safeeval->deny(":base_orig");
802: $safeinit .= ';$external::target="'.$target.'";';
803: my $rndseed;
804: my ($symb,$courseid,$domain,$name) = &Apache::lonxml::whichuser();
805: $rndseed=&Apache::lonnet::rndseed($symb,$courseid,$domain,$name);
806: $safeinit .= ';$external::randomseed='.$rndseed.';';
807: &Apache::run::run($safeinit,$safeeval);
808: }
809:
810: sub startredirection {
811: $Apache::lonxml::redirection++;
812: push (@Apache::lonxml::outputstack, '');
813: }
814:
815: sub endredirection {
816: if (!$Apache::lonxml::redirection) {
817: &Apache::lonxml::error("Endredirection was called, before a startredirection, perhaps you have unbalanced tags. Some debuging information:".join ":",caller);
818: return '';
819: }
820: $Apache::lonxml::redirection--;
821: pop @Apache::lonxml::outputstack;
822: }
823:
824: sub end_tag {
825: my ($tagstack,$parstack,$token)=@_;
826: pop(@$tagstack);
827: pop(@$parstack);
828: &decreasedepth($token);
829: }
830:
831: sub initdepth {
832: @Apache::lonxml::depthcounter=();
833: $Apache::lonxml::depth=-1;
834: $Apache::lonxml::olddepth=-1;
835: }
836:
837: sub increasedepth {
838: my ($token) = @_;
839: $Apache::lonxml::depth++;
840: $Apache::lonxml::depthcounter[$Apache::lonxml::depth]++;
841: if ($Apache::lonxml::depthcounter[$Apache::lonxml::depth]==1) {
842: $Apache::lonxml::olddepth=$Apache::lonxml::depth;
843: }
844: my $curdepth=join('_',@Apache::lonxml::depthcounter);
845: &Apache::lonxml::debug("s $Apache::lonxml::depth : $Apache::lonxml::olddepth : $curdepth : $token->[1]\n");
846: #print "<br />s $Apache::lonxml::depth : $Apache::lonxml::olddepth : $curdepth : $token->[1]\n";
847: }
848:
849: sub decreasedepth {
850: my ($token) = @_;
851: $Apache::lonxml::depth--;
852: if ($Apache::lonxml::depth<$Apache::lonxml::olddepth-1) {
853: $#Apache::lonxml::depthcounter--;
854: $Apache::lonxml::olddepth=$Apache::lonxml::depth+1;
855: }
856: if ( $Apache::lonxml::depth < -1) {
857: &Apache::lonxml::warning("Missing tags, unable to properly run file.");
858: $Apache::lonxml::depth='-1';
859: }
860: my $curdepth=join('_',@Apache::lonxml::depthcounter);
861: &Apache::lonxml::debug("e $Apache::lonxml::depth : $Apache::lonxml::olddepth : $token->[1] : $curdepth\n");
862: #print "<br />e $Apache::lonxml::depth : $Apache::lonxml::olddepth : $token->[1] : $curdepth\n";
863: }
864:
865: sub get_all_text {
866:
867: my($tag,$pars)= @_;
868: my $depth=0;
869: my $token;
870: my $result='';
871: if ( $tag =~ m:^/: ) {
872: my $tag=substr($tag,1);
873: # &Apache::lonxml::debug("have:$tag:");
874: while (($depth >=0) && ($token = $pars->get_token)) {
875: # &Apache::lonxml::debug("e token:$token->[0]:$depth:$token->[1]");
876: if (($token->[0] eq 'T')||($token->[0] eq 'C')||($token->[0] eq 'D')) {
877: $result.=$token->[1];
878: } elsif ($token->[0] eq 'PI') {
879: $result.=$token->[2];
880: } elsif ($token->[0] eq 'S') {
881: if ($token->[1] eq $tag) { $depth++; }
882: $result.=$token->[4];
883: } elsif ($token->[0] eq 'E') {
884: if ( $token->[1] eq $tag) { $depth--; }
885: #skip sending back the last end tag
886: if ($depth > -1) { $result.=$token->[2]; } else {
887: $pars->unget_token($token);
888: }
889: }
890: }
891: } else {
892: while ($token = $pars->get_token) {
893: # &Apache::lonxml::debug("s token:$token->[0]:$depth:$token->[1]");
894: if (($token->[0] eq 'T')||($token->[0] eq 'C')||($token->[0] eq 'D')) {
895: $result.=$token->[1];
896: } elsif ($token->[0] eq 'PI') {
897: $result.=$token->[2];
898: } elsif ($token->[0] eq 'S') {
899: if ( $token->[1] eq $tag) {
900: $pars->unget_token($token); last;
901: } else {
902: $result.=$token->[4];
903: }
904: } elsif ($token->[0] eq 'E') {
905: $result.=$token->[2];
906: }
907: }
908: }
909: # &Apache::lonxml::debug("Exit:$result:");
910: return $result
911: }
912:
913: sub newparser {
914: my ($parser,$contentref,$dir) = @_;
915: push (@$parser,HTML::TokeParser->new($contentref));
916: $$parser['-1']->xml_mode('1');
917: if ( $dir eq '' ) {
918: push (@Apache::lonxml::pwd, $Apache::lonxml::pwd[$#Apache::lonxml::pwd]);
919: } else {
920: push (@Apache::lonxml::pwd, $dir);
921: }
922: # &Apache::lonxml::debug("pwd:$#Apache::lonxml::pwd");
923: # &Apache::lonxml::debug("pwd:$Apache::lonxml::pwd[$#Apache::lonxml::pwd]");
924: }
925:
926: sub parstring {
927: my ($token) = @_;
928: my $temp='';
929: map {
930: unless ($_=~/\W/) {
931: my $val=$token->[2]->{$_};
932: $val =~ s/([\%\@\\])/\\$1/g;
933: #if ($val =~ m/^[\%\@]/) { $val="\\".$val; }
934: $temp .= "my \$$_=\"$val\";"
935: }
936: } @{$token->[3]};
937: return $temp;
938: }
939:
940: sub writeallows {
941: unless ($#extlinks>=0) { return; }
942: my $thisurl='/res/'.&Apache::lonnet::declutter(shift);
943: if ($ENV{'httpref.'.$thisurl}) {
944: $thisurl=$ENV{'httpref.'.$thisurl};
945: }
946: my $thisdir=$thisurl;
947: $thisdir=~s/\/[^\/]+$//;
948: my %httpref=();
949: map {
950: $httpref{'httpref.'.
951: &Apache::lonnet::hreflocation($thisdir,$_)}=$thisurl;
952: } @extlinks;
953: @extlinks=();
954: &Apache::lonnet::appenv(%httpref);
955: }
956:
957: #
958: # Afterburner handles anchors, highlights and links
959: #
960: sub afterburn {
961: my $result=shift;
962: map {
963: my ($name, $value) = split(/=/,$_);
964: $value =~ tr/+/ /;
965: $value =~ s/%([a-fA-F0-9][a-fA-F0-9])/pack("C",hex($1))/eg;
966: if (($name eq 'highlight')||($name eq 'anchor')||($name eq 'link')) {
967: unless ($ENV{'form.'.$name}) {
968: $ENV{'form.'.$name}=$value;
969: }
970: }
971: } (split(/&/,$ENV{'QUERY_STRING'}));
972: if ($ENV{'form.highlight'}) {
973: map {
974: my $anchorname=$_;
975: my $matchthis=$anchorname;
976: $matchthis=~s/\_+/\\s\+/g;
977: $result=~s/($matchthis)/\<font color=\"red\"\>$1\<\/font\>/gs;
978: } split(/\,/,$ENV{'form.highlight'});
979: }
980: if ($ENV{'form.link'}) {
981: map {
982: my ($anchorname,$linkurl)=split(/\>/,$_);
983: my $matchthis=$anchorname;
984: $matchthis=~s/\_+/\\s\+/g;
985: $result=~s/($matchthis)/\<a href=\"$linkurl\"\>$1\<\/a\>/gs;
986: } split(/\,/,$ENV{'form.link'});
987: }
988: if ($ENV{'form.anchor'}) {
989: my $anchorname=$ENV{'form.anchor'};
990: my $matchthis=$anchorname;
991: $matchthis=~s/\_+/\\s\+/g;
992: $result=~s/($matchthis)/\<a name=\"$anchorname\"\>$1\<\/a\>/s;
993: $result.=(<<"ENDSCRIPT");
994: <script>
995: document.location.hash='$anchorname';
996: </script>
997: ENDSCRIPT
998: }
999: return $result;
1000: }
1001:
1002: sub storefile {
1003: my ($file,$contents)=@_;
1004: if (my $fh=Apache::File->new('>'.$file)) {
1005: print $fh $contents;
1006: $fh->close();
1007: }
1008: }
1009:
1010: sub inserteditinfo {
1011: my ($result,$filecontents)=@_;
1012: unless ($filecontents) {
1013: $filecontents=(<<SIMPLECONTENT);
1014: <html>
1015: <head>
1016: <title>
1017: Title of Document Goes Here
1018: </title>
1019: </head>
1020: <body bgcolor="#FFFFFF">
1021:
1022: Body of Document Goes Here
1023:
1024: </body>
1025: </html>
1026: SIMPLECONTENT
1027: }
1028: my $editheader='<a href="#editsection">Edit below</a><hr />';
1029: my $editfooter=(<<ENDFOOTER);
1030: <hr />
1031: <a name="editsection" />
1032: <form method="post">
1033: <textarea cols="80" rows="40" name="filecont">$filecontents</textarea>
1034: <br />
1035: <input type="submit" name="attemptclean"
1036: value="Save and then attempt to clean HTML" />
1037: <input type="submit" name="savethisfile" value="Save this" />
1038: </form>
1039: ENDFOOTER
1040: $result=~s/(\<body[^\>]*\>)/$1$editheader/is;
1041: $result=~s/(\<\/body\>)/$editfooter/is;
1042: return $result;
1043: }
1044:
1045: sub handler {
1046: my $request=shift;
1047:
1048: my $target='web';
1049:
1050: $Apache::lonxml::debug=0;
1051:
1052: if ($ENV{'browser.mathml'}) {
1053: $request->content_type('text/xml');
1054: } else {
1055: $request->content_type('text/html');
1056: }
1057: &Apache::loncommon::no_cache($request);
1058: $request->send_http_header;
1059:
1060: return OK if $request->header_only;
1061:
1062:
1063: my $file=&Apache::lonnet::filelocation("",$request->uri);
1064: #
1065: # Edit action? Save file.
1066: #
1067: unless ($ENV{'request.state'} eq 'published') {
1068: if (($ENV{'form.savethisfile'}) || ($ENV{'form.attemptclean'})) {
1069: &storefile($file,$ENV{'form.filecont'});
1070: }
1071: }
1072: my %mystyle;
1073: my $result = '';
1074: my $filecontents=&Apache::lonnet::getfile($file);
1075: if ($filecontents == -1) {
1076: $result=(<<ENDNOTFOUND);
1077: <html>
1078: <head>
1079: <title>File not found</title>
1080: </head>
1081: <body bgcolor="#FFFFFF">
1082: <b>File not found: $file</b>
1083: </body>
1084: </html>
1085: ENDNOTFOUND
1086: $filecontents='';
1087: } else {
1088: unless ($ENV{'request.state'} eq 'published') {
1089: if ($ENV{'form.attemptclean'}) {
1090: $filecontents=&htmlclean($filecontents,1);
1091: }
1092: }
1093: $result = &Apache::lonxml::xmlparse($target,$filecontents,'',%mystyle);
1094: }
1095:
1096: #
1097: # Edit action? Insert editing commands
1098: #
1099: unless ($ENV{'request.state'} eq 'published') {
1100: $result=&inserteditinfo($result,$filecontents);
1101: }
1102:
1103: writeallows($request->uri);
1104:
1105: $request->print($result);
1106:
1107: return OK;
1108: }
1109:
1110: sub debug {
1111: if ($Apache::lonxml::debug eq 1) {
1112: print("DEBUG:".$_[0]."<br />\n");
1113: }
1114: }
1115:
1116: sub error {
1117: if (($Apache::lonxml::debug eq 1) || ($ENV{'request.state'} eq 'construct') ) {
1118: print "<b>ERROR:</b>".$_[0]."<br />\n";
1119: } else {
1120: print "<b>An Error occured while processing this resource. The instructor has been notified.</b> <br />";
1121: #notify author
1122: &Apache::lonmsg::author_res_msg($ENV{'request.filename'},$_[0]);
1123: #notify course
1124: if ( $ENV{'request.course.id'} ) {
1125: my $users=$ENV{'course.'.$ENV{'request.course.id'}.'.comment.email'};
1126: foreach my $user (split /\,/, $users) {
1127: ($user,my $domain) = split /:/, $user;
1128: &Apache::lonmsg::user_normal_msg($user,$domain,"Error in $ENV{'request.filename'}",$_[0]);
1129: }
1130: }
1131:
1132: #FIXME probably shouldn't have me get everything forever.
1133: &Apache::lonmsg::user_normal_msg('albertel','msu',"Error in $ENV{'request.filename'}",$_[0]);
1134: #&Apache::lonmsg::user_normal_msg('albertel','103',"Error in $ENV{'request.filename'}",$_[0]);
1135: }
1136: }
1137:
1138: sub warning {
1139: if ($ENV{'request.state'} eq 'construct') {
1140: print "<b>W</b>ARNING<b>:</b>".$_[0]."<br />\n";
1141: }
1142: }
1143:
1144: sub get_param {
1145: my ($param,$parstack,$safeeval,$context) = @_;
1146: if ( ! $context ) { $context = -1; }
1147: my $args ='';
1148: if ( $#$parstack > (-2-$context) ) { $args=$$parstack[$context]; }
1149: if ( $args =~ /my \$$param=\"/ ) {
1150: return &Apache::run::run("{$args;".'return $'.$param.'}',$safeeval); #'
1151: } else {
1152: return undef;
1153: }
1154: }
1155:
1156: sub get_param_var {
1157: my ($param,$parstack,$safeeval,$context) = @_;
1158: if ( ! $context ) { $context = -1; }
1159: my $args ='';
1160: if ( $#$parstack > (-2-$context) ) { $args=$$parstack[$context]; }
1161: if ( $args !~ /my \$$param=\"/ ) { return undef; }
1162: my $value=&Apache::run::run("{$args;".'return $'.$param.'}',$safeeval); #'
1163: if ($value =~ /^[\$\@\%]/) {
1164: return &Apache::run::run("return $value",$safeeval,1);
1165: } else {
1166: return $value;
1167: }
1168: }
1169:
1170: sub register_insert {
1171: my @data = split /\n/, &Apache::lonnet::getfile('/home/httpd/lonTabs/insertlist.tab');
1172: my $i;
1173: my $tagnum=0;
1174: my @order;
1175: for ($i=0;$i < $#data; $i++) {
1176: my $line = $data[$i];
1177: if ( $line =~ /^\#/ || $line =~ /^\s*\n/) { next; }
1178: if ( $line =~ /TABLE/ ) { last; }
1179: my ($tag,$descrip,$color,$function,$show) = split(/,/, $line);
1180: if ($tag) {
1181: $insertlist{"$tagnum.tag"} = $tag;
1182: $insertlist{"$tagnum.description"} = $descrip;
1183: $insertlist{"$tagnum.color"} = $color;
1184: $insertlist{"$tagnum.function"} = $function;
1185: if (!defined($show)) { $show='yes'; }
1186: $insertlist{"$tagnum.show"}= $show;
1187: $insertlist{"$tag.num"}=$tagnum;
1188: $tagnum++;
1189: }
1190: }
1191: $i++; #skipping TABLE line
1192: $tagnum = 0;
1193: for (;$i < $#data;$i++) {
1194: my $line = $data[$i];
1195: my ($mnemonic,@which) = split(/ +/,$line);
1196: my $tag = $insertlist{"$tagnum.tag"};
1197: for (my $j=0;$j <$#which;$j++) {
1198: if ( $which[$j] eq 'Y' ) {
1199: if ($insertlist{"$j.show"} ne 'no') {
1200: push(@{ $insertlist{"$tag.which"} },$j);
1201: }
1202: }
1203: }
1204: $tagnum++;
1205: }
1206: }
1207:
1208: sub description {
1209: my ($token)=@_;
1210: my $tagnum;
1211: my $tag=$token->[1];
1212: foreach my $namespace (reverse @Apache::lonxml::namespace) {
1213: my $testtag=$namespace.'::'.$tag;
1214: $tagnum=$insertlist{"$testtag.num"};
1215: if (defined($tagnum)) { last; }
1216: }
1217: if (!defined ($tagnum)) { $tagnum=$Apache::lonxml::insertlist{"$tag.num"}; }
1218: return $insertlist{$tagnum.'.description'};
1219: }
1220:
1221: # ----------------------------------------------------------------- whichuser
1222: # returns a list of $symb, $courseid, $domain, $name that is correct for
1223: # calls to lonnet functions for this setup.
1224: # - looks for form.grade_ parameters
1225: sub whichuser {
1226: my ($symb,$courseid,$domain,$name);
1227: if (defined($ENV{'form.grade_symb'})) {
1228: my $tmp_courseid=$ENV{'form.grade_courseid'};
1229: my $allowed=&Apache::lonnet::allowed('mgr',$tmp_courseid);
1230: if ($allowed) {
1231: $symb=$ENV{'form.grade_symb'};
1232: $courseid=$ENV{'form.grade_courseid'};
1233: $domain=$ENV{'form.grade_domain'};
1234: $name=$ENV{'form.grade_username'};
1235: }
1236: } else {
1237: $symb=&Apache::lonnet::symbread();
1238: $courseid=$ENV{'request.course.id'};
1239: $domain=$ENV{'user.domain'};
1240: $name=$ENV{'user.name'};
1241: }
1242: return ($symb,$courseid,$domain,$name);
1243: }
1244:
1245: 1;
1246: __END__
1247:
1248:
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