1: # The LearningOnline Network with CAPA
2: # XML Parser Module
3: #
4: # $Id: lonxml.pm,v 1.142 2001/12/21 22:44:06 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: foreach my $temptag (@taglist) {
78: my $tempspace = $Apache::lonxml::alltags{$temptag}[-1];
79: if ($tempspace eq $space) {
80: pop(@{ $Apache::lonxml::alltags{$temptag} });
81: }
82: }
83: #&printalltags();
84: }
85:
86: use Apache::Constants qw(:common);
87: use Apache::lontexconvert;
88: use Apache::style;
89: use Apache::run;
90: use Apache::londefdef;
91: use Apache::scripttag;
92: use Apache::edit;
93: use Apache::lonnet;
94: use Apache::File;
95: use Apache::loncommon;
96:
97: #================================================== Main subroutine: xmlparse
98: #debugging control, to turn on debugging modify the correct handler
99: $Apache::lonxml::debug=0;
100:
101: #path to the directory containing the file currently being processed
102: @pwd=();
103:
104: #these two are used for capturing a subset of the output for later processing,
105: #don't touch them directly use &startredirection and &endredirection
106: @outputstack = ();
107: $redirection = 0;
108:
109: #controls wheter the <import> tag actually does
110: $import = 1;
111: @extlinks=();
112:
113: # meta mode is a bit weird only some output is to be turned off
114: #<output> tag turns metamode off (defined in londefdef.pm)
115: $metamode = 0;
116:
117: # turns on and of run::evaluate actually derefencing var refs
118: $evaluate = 1;
119:
120: # data structure for eidt mode, determines what tags can go into what other tags
121: %insertlist=();
122:
123: # stores the list of active tag namespaces
124: @namespace=();
125:
126: # has the dynamic menu been updated to know about this resource
127: $Apache::lonxml::registered=0;
128:
129: sub xmlbegin {
130: my $output='';
131: if ($ENV{'browser.mathml'}) {
132: $output='<?xml version="1.0"?>'
133: .'<?xml-stylesheet type="text/css" href="/adm/MathML/mathml.css"?>'
134: .'<!DOCTYPE html SYSTEM "/adm/MathML/mathml.dtd" '
135: .'[<!ENTITY mathns "http://www.w3.org/1998/Math/MathML">]>'
136: .'<html xmlns:math="http://www.w3.org/1998/Math/MathML" '
137: .'xmlns="http://www.w3.org/TR/REC-html40">';
138: } else {
139: $output='<html>';
140: }
141: return $output;
142: }
143:
144: sub xmlend {
145: my $discussion='';
146: if ($ENV{'request.course.id'}) {
147: my $crs='/'.$ENV{'request.course.id'};
148: if ($ENV{'request.course.sec'}) {
149: $crs.='_'.$ENV{'request.course.sec'};
150: }
151: $crs=~s/\_/\//g;
152: my $seeid=&Apache::lonnet::allowed('rin',$crs);
153: my $symb=&Apache::lonnet::symbread();
154: if ($symb) {
155: my %contrib=&Apache::lonnet::restore($symb,$ENV{'request.course.id'},
156: $ENV{'course.'.$ENV{'request.course.id'}.'.domain'},
157: $ENV{'course.'.$ENV{'request.course.id'}.'.num'});
158: if ($contrib{'version'}) {
159: $discussion.=
160: '<address><hr /><h2>Course Discussion of Resource</h2>';
161: my $idx;
162: for ($idx=1;$idx<=$contrib{'version'};$idx++) {
163: my $hidden=($contrib{'hidden'}=~/\.$idx\./);
164: unless (($hidden) && (!$seeid)) {
165: my $message=$contrib{$idx.':message'};
166: $message=~s/\n/\<br \/\>/g;
167: if ($message) {
168: if ($hidden) {
169: $message='<font color="#888888">'.$message.'</font>';
170: }
171: my $sender='Anonymous';
172: if ((!$contrib{$idx.':anonymous'}) || ($seeid)) {
173: $sender=$contrib{$idx.':sendername'}.' at '.
174: $contrib{$idx.':senderdomain'};
175: if ($contrib{$idx.':anonymous'}) {
176: $sender.=' (anonymous)';
177: }
178: if ($seeid) {
179: if ($hidden) {
180: $sender.=' <a href="/adm/feedback?unhide='.
181: $symb.':::'.$idx.'">Make Visible</a>';
182: } else {
183: $sender.=' <a href="/adm/feedback?hide='.
184: $symb.':::'.$idx.'">Hide</a>';
185: }
186: }
187: }
188: $discussion.='<p><b>'.$sender.'</b> ('.
189: localtime($contrib{$idx.':timestamp'}).
190: '):<blockquote>'.$message.
191: '</blockquote></p>';
192: }
193: }
194: }
195: $discussion.='</address>';
196: }
197: }
198: }
199: return $discussion.'</html>';
200: }
201:
202: sub tokeninputfield {
203: my $defhost=$Apache::lonnet::perlvar{'lonHostID'};
204: $defhost=~tr/a-z/A-Z/;
205: return (<<ENDINPUTFIELD)
206: <script>
207: function updatetoken() {
208: var comp=new Array;
209: var barcode=unescape(document.tokeninput.barcode.value);
210: comp=barcode.split('*');
211: if (typeof(comp[0])!="undefined") {
212: document.tokeninput.codeone.value=comp[0];
213: }
214: if (typeof(comp[1])!="undefined") {
215: document.tokeninput.codetwo.value=comp[1];
216: }
217: if (typeof(comp[2])!="undefined") {
218: comp[2]=comp[2].toUpperCase();
219: document.tokeninput.codethree.value=comp[2];
220: }
221: document.tokeninput.barcode.value='';
222: }
223: </script>
224: <form method="post" name="tokeninput">
225: <table border="2" bgcolor="#FFFFBB">
226: <tr><th>DocID Checkin</th></tr>
227: <tr><td>
228: <table>
229: <tr>
230: <td>Scan in Barcode</td>
231: <td><input type="text" size="22" name="barcode"
232: onChange="updatetoken()"/></td>
233: </tr>
234: <tr><td><i>or</i> Type in DocID</td>
235: <td>
236: <input type="text" size="5" name="codeone" />
237: <b><font size="+2">*</font></b>
238: <input type="text" size="5" name="codetwo" />
239: <b><font size="+2">*</font></b>
240: <input type="text" size="10" name="codethree" value="$defhost"
241: onChange="this.value=this.value.toUpperCase()" />
242: </td></tr>
243: </table>
244: </td></tr>
245: <tr><td><input type="submit" value="Check in DocID" /></td></tr>
246: </table>
247: </form>
248: ENDINPUTFIELD
249: }
250:
251: sub maketoken {
252: my ($symb,$tuname,$tudom,$tcrsid)=@_;
253: unless ($symb) {
254: $symb=&Apache::lonnet::symbread();
255: }
256: unless ($tuname) {
257: $tuname=$ENV{'user.name'};
258: $tudom=$ENV{'user.domain'};
259: $tcrsid=$ENV{'request.course.id'};
260: }
261:
262: return &Apache::lonnet::checkout($symb,$tuname,$tudom,$tcrsid);
263: }
264:
265: sub printtokenheader {
266: my ($target,$token,$tsymb,$tcrsid,$tudom,$tuname)=@_;
267: unless ($token) { return ''; }
268:
269: my ($symb,$courseid,$domain,$name) = &Apache::lonxml::whichuser();
270: unless ($tsymb) {
271: $tsymb=$symb;
272: }
273: unless ($tuname) {
274: $tuname=$name;
275: $tudom=$domain;
276: $tcrsid=$courseid;
277: }
278:
279: my %reply=&Apache::lonnet::get('environment',
280: ['firstname','middlename','lastname','generation'],
281: $tudom,$tuname);
282: my $plainname=$reply{'firstname'}.' '.
283: $reply{'middlename'}.' '.
284: $reply{'lastname'}.' '.
285: $reply{'generation'};
286:
287: if ($target eq 'web') {
288: return
289: '<img align="right" src="/cgi-bin/barcode.gif?encode='.$token.'" />'.
290: 'Checked out for '.$plainname.
291: '<br />User: '.$tuname.' at '.$tudom.
292: '<br />CourseID: '.$tcrsid.
293: '<br />DocID: '.$token.
294: '<br />Time: '.localtime().'<hr />';
295: } else {
296: return $token;
297: }
298: }
299:
300: sub fontsettings() {
301: my $headerstring='';
302: if (($ENV{'browser.os'} eq 'mac') && (!$ENV{'browser.mathml'})) {
303: $headerstring.=
304: '<meta Content-Type="text/html; charset=x-mac-roman">';
305: }
306: return $headerstring;
307: }
308:
309: sub registerurl {
310: my $forcereg=shift;
311: if ($ENV{'request.publicaccess'}) {
312: return
313: '<script>function LONCAPAreg(){} function LONCAPAstale(){}</script>';
314: }
315: if ($Apache::lonxml::registered && !$forcereg) { return ''; }
316: $Apache::lonxml::registered=1;
317: if (($ENV{'REQUEST_URI'}!~/^\/(res\/)*adm\//) || ($forcereg)) {
318: my $hwkadd='';
319: if ($ENV{'REQUEST_URI'}=~/\.(problem|exam|quiz|assess|survey|form)$/) {
320: if (&Apache::lonnet::allowed('vgr',$ENV{'request.course.id'})) {
321: $hwkadd.=(<<ENDSUBM);
322: menu.switchbutton
323: (7,1,'subm.gif','view sub','missions',
324: 'gocmd("/adm/grades","submission")');
325: ENDSUBM
326: }
327: if (&Apache::lonnet::allowed('mgr',$ENV{'request.course.id'})) {
328: $hwkadd.=(<<ENDGRDS);
329: menu.switchbutton
330: (7,2,'pgrd.gif','problem','grades',
331: 'gocmd("/adm/grades","viewgrades")');
332: ENDGRDS
333: }
334: if (&Apache::lonnet::allowed('opa',$ENV{'request.course.id'})) {
335: $hwkadd.=(<<ENDPARM);
336: menu.switchbutton
337: (7,3,'pparm.gif','problem','parms',
338: 'gocmd("/adm/parmset","set")');
339: ENDPARM
340: }
341: }
342: return (<<ENDREGTHIS);
343:
344: <script language="JavaScript">
345: // BEGIN LON-CAPA Internal
346:
347: function LONCAPAreg() {
348: menu=window.open("","LONCAPAmenu");
349: menu.clearTimeout(menu.menucltim);
350: menu.currentURL=window.location.pathname;
351: menu.currentStale=0;
352: menu.clearbut(3,1);
353: menu.switchbutton
354: (6,3,'catalog.gif','catalog','info','catalog_info()');
355: menu.switchbutton
356: (8,1,'eval.gif','evaluate','this','gopost("/adm/evaluate",currentURL)');
357: menu.switchbutton
358: (8,2,'fdbk.gif','feedback','on this','gopost("/adm/feedback",currentURL)');
359: menu.switchbutton
360: (8,3,'prt.gif','prepare','printout','gopost("/adm/printout",currentURL)');
361: menu.switchbutton
362: (2,1,'back.gif','backward','','gopost("/adm/flip","back:"+currentURL)');
363: menu.switchbutton
364: (2,3,'forw.gif','forward','','gopost("/adm/flip","forward:"+currentURL)');
365: menu.switchbutton
366: (9,1,'sbkm.gif','set','bookmark','set_bookmark()');
367: menu.switchbutton
368: (9,2,'vbkm.gif','view','bookmark','edit_bookmarks()');
369: menu.switchbutton
370: (9,3,'anot.gif','anno-','tations','annotate()');
371: $hwkadd
372: }
373:
374: function LONCAPAstale() {
375: menu=window.open("","LONCAPAmenu");
376: menu.currentStale=1;
377: menu.switchbutton
378: (3,1,'reload.gif','return','location','go(currentURL)');
379: menu.clearbut(7,1);
380: menu.clearbut(7,2);
381: menu.clearbut(7,3);
382: menu.menucltim=menu.setTimeout(
383: 'clearbut(2,1);clearbut(2,3);clearbut(8,1);clearbut(8,2);clearbut(8,3);'+
384: 'clearbut(9,1);clearbut(9,2);clearbut(9,3);clearbut(6,3)',
385: 2000);
386:
387: }
388:
389: // END LON-CAPA Internal
390: </script>
391: ENDREGTHIS
392:
393: } else {
394: return (<<ENDDONOTREGTHIS);
395:
396: <script language="JavaScript">
397: // BEGIN LON-CAPA Internal
398:
399: function LONCAPAreg() {
400: menu=window.open("","LONCAPAmenu");
401: menu.currentStale=1;
402: menu.clearbut(2,1);
403: menu.clearbut(2,3);
404: menu.clearbut(8,1);
405: menu.clearbut(8,2);
406: menu.clearbut(8,3);
407: if (menu.currentURL) {
408: menu.switchbutton
409: (3,1,'reload.gif','return','location','go(currentURL)');
410: } else {
411: menu.clearbut(3,1);
412: }
413: }
414:
415: function LONCAPAstale() {
416: }
417:
418: // END LON-CAPA Internal
419: </script>
420: ENDDONOTREGTHIS
421:
422: }
423: }
424:
425: sub loadevents() {
426: return 'LONCAPAreg();';
427: }
428:
429: sub unloadevents() {
430: return 'LONCAPAstale();';
431: }
432:
433: sub printalltags {
434: my $temp;
435: foreach $temp (sort keys %Apache::lonxml::alltags) {
436: &Apache::lonxml::debug("$temp -- ".
437: join(',',@{ $Apache::lonxml::alltags{$temp} }));
438: }
439: }
440:
441: sub xmlparse {
442: my ($target,$content_file_string,$safeinit,%style_for_target) = @_;
443:
444: &setup_globals($target);
445: #&printalltags();
446: my @pars = ();
447: my $pwd=$ENV{'request.filename'};
448: $pwd =~ s:/[^/]*$::;
449: &newparser(\@pars,\$content_file_string,$pwd);
450:
451: my $safeeval = new Safe;
452: my $safehole = new Safe::Hole;
453: &init_safespace($target,$safeeval,$safehole,$safeinit);
454: #-------------------- Redefinition of the target in the case of compound target
455:
456: ($target, my @tenta) = split('&&',$target);
457:
458: my @stack = ();
459: my @parstack = ();
460: &initdepth;
461:
462: my $finaloutput = &inner_xmlparse($target,\@stack,\@parstack,\@pars,
463: $safeeval,\%style_for_target);
464: if ($ENV{'request.uri'}) {
465: &writeallows($ENV{'request.uri'});
466: }
467: return $finaloutput;
468: }
469:
470: sub htmlclean {
471: my ($raw,$full)=@_;
472:
473: my $tree = HTML::TreeBuilder->new;
474: $tree->ignore_unknown(0);
475:
476: $tree->parse($raw);
477:
478: my $output= $tree->as_HTML(undef,' ');
479:
480: $output=~s/\<(br|hr|img|meta|allow)([^\>\/]*)\>/\<$1$2 \/\>/gis;
481: $output=~s/\<\/(br|hr|img|meta|allow)\>//gis;
482: unless ($full) {
483: $output=~s/\<[\/]*(body|head|html)\>//gis;
484: }
485:
486: $tree = $tree->delete;
487:
488: return $output;
489: }
490:
491: sub inner_xmlparse {
492: my ($target,$stack,$parstack,$pars,$safeeval,$style_for_target)=@_;
493: my $finaloutput = '';
494: my $result;
495: my $token;
496: while ( $#$pars > -1 ) {
497: while ($token = $$pars['-1']->get_token) {
498: if (($token->[0] eq 'T') || ($token->[0] eq 'C') || ($token->[0] eq 'D') ) {
499: if ($metamode<1) {
500: $result=$token->[1];
501: }
502: } elsif ($token->[0] eq 'PI') {
503: if ($metamode<1) {
504: $result=$token->[2];
505: }
506: } elsif ($token->[0] eq 'S') {
507: # add tag to stack
508: push (@$stack,$token->[1]);
509: # add parameters list to another stack
510: push (@$parstack,&parstring($token));
511: &increasedepth($token);
512: if (exists $$style_for_target{$token->[1]}) {
513: if ($Apache::lonxml::redirection) {
514: $Apache::lonxml::outputstack['-1'] .=
515: &recurse($$style_for_target{$token->[1]},$target,$safeeval,
516: $style_for_target,@$parstack);
517: } else {
518: $finaloutput .= &recurse($$style_for_target{$token->[1]},$target,
519: $safeeval,$style_for_target,@$parstack);
520: }
521: } else {
522: $result = &callsub("start_$token->[1]", $target, $token, $stack,
523: $parstack, $pars, $safeeval, $style_for_target);
524: }
525: } elsif ($token->[0] eq 'E') {
526: #clear out any tags that didn't end
527: while ($token->[1] ne $$stack['-1'] && ($#$stack > -1)) {
528: &Apache::lonxml::warning('Missing tag </'.$$stack['-1'].'> in file');
529: &end_tag($stack,$parstack,$token);
530: }
531:
532: if (exists($$style_for_target{'/'."$token->[1]"})) {
533: if ($Apache::lonxml::redirection) {
534: $Apache::lonxml::outputstack['-1'] .=
535: &recurse($$style_for_target{'/'."$token->[1]"},
536: $target,$safeeval,$style_for_target,@$parstack);
537: } else {
538: $finaloutput .= &recurse($$style_for_target{'/'."$token->[1]"},
539: $target,$safeeval,$style_for_target,
540: @$parstack);
541: }
542: } else {
543: $result = &callsub("end_$token->[1]", $target, $token, $stack,
544: $parstack, $pars,$safeeval, $style_for_target);
545: }
546: } else {
547: &Apache::lonxml::error("Unknown token event :$token->[0]:$token->[1]:");
548: }
549: #evaluate variable refs in result
550: if ($result ne "") {
551: if ( $#$parstack > -1 ) {
552: if ($Apache::lonxml::redirection) {
553: $Apache::lonxml::outputstack['-1'] .=
554: &Apache::run::evaluate($result,$safeeval,$$parstack['-1']);
555: } else {
556: $finaloutput .= &Apache::run::evaluate($result,$safeeval,
557: $$parstack['-1']);
558: }
559: } else {
560: $finaloutput .= &Apache::run::evaluate($result,$safeeval,'');
561: }
562: $result = '';
563: }
564: if ($token->[0] eq 'E') {
565: &end_tag($stack,$parstack,$token);
566: }
567: }
568: pop @$pars;
569: pop @Apache::lonxml::pwd;
570: }
571:
572: # if ($target eq 'meta') {
573: # $finaloutput.=&endredirection;
574: # }
575:
576: if (($ENV{'QUERY_STRING'}) && ($target eq 'web')) {
577: $finaloutput=&afterburn($finaloutput);
578: }
579: return $finaloutput;
580: }
581:
582: sub recurse {
583: my @innerstack = ();
584: my @innerparstack = ();
585: my ($newarg,$target,$safeeval,$style_for_target,@parstack) = @_;
586: my @pat = ();
587: &newparser(\@pat,\$newarg);
588: my $tokenpat;
589: my $partstring = '';
590: my $output='';
591: my $decls='';
592: &Apache::lonxml::debug("Recursing");
593: while ( $#pat > -1 ) {
594: while ($tokenpat = $pat[$#pat]->get_token) {
595: if (($tokenpat->[0] eq 'T') || ($tokenpat->[0] eq 'C') || ($tokenpat->[0] eq 'D') ) {
596: if ($metamode<1) { $partstring=$tokenpat->[1]; }
597: } elsif ($tokenpat->[0] eq 'PI') {
598: if ($metamode<1) { $partstring=$tokenpat->[2]; }
599: } elsif ($tokenpat->[0] eq 'S') {
600: push (@innerstack,$tokenpat->[1]);
601: push (@innerparstack,&parstring($tokenpat));
602: &increasedepth($tokenpat);
603: $partstring = &callsub("start_$tokenpat->[1]", $target, $tokenpat,
604: \@innerstack, \@innerparstack, \@pat,
605: $safeeval, $style_for_target);
606: } elsif ($tokenpat->[0] eq 'E') {
607: #clear out any tags that didn't end
608: while ($tokenpat->[1] ne $innerstack[$#innerstack]
609: && ($#innerstack > -1)) {
610: &Apache::lonxml::warning('Missing tag </'.$innerstack['-1'].'> in style');
611: &end_tag(\@innerstack,\@innerparstack,$tokenpat);
612: }
613: $partstring = &callsub("end_$tokenpat->[1]", $target, $tokenpat,
614: \@innerstack, \@innerparstack, \@pat,
615: $safeeval, $style_for_target);
616: } else {
617: &Apache::lonxml::error("Unknown token event :$tokenpat->[0]:$tokenpat->[1]:");
618: }
619: #pass both the variable to the style tag, and the tag we
620: #are processing inside the <definedtag>
621: if ( $partstring ne "" ) {
622: if ( $#parstack > -1 ) {
623: if ( $#innerparstack > -1 ) {
624: $decls= $parstack[$#parstack].$innerparstack[$#innerparstack];
625: } else {
626: $decls= $parstack[$#parstack];
627: }
628: } else {
629: if ( $#innerparstack > -1 ) {
630: $decls=$innerparstack[$#innerparstack];
631: } else {
632: $decls='';
633: }
634: }
635: $output .= &Apache::run::evaluate($partstring,$safeeval,$decls);
636: $partstring = '';
637: }
638: if ($tokenpat->[0] eq 'E') { pop @innerstack;pop @innerparstack;
639: &decreasedepth($tokenpat);}
640: }
641: pop @pat;
642: pop @Apache::lonxml::pwd;
643: }
644: &Apache::lonxml::debug("Exiting Recursing");
645: return $output;
646: }
647:
648: sub callsub {
649: my ($sub,$target,$token,$tagstack,$parstack,$parser,$safeeval,$style)=@_;
650: my $currentstring='';
651: my $nodefault;
652: {
653: my $sub1;
654: no strict 'refs';
655: my $tag=$token->[1];
656: my $space=$Apache::lonxml::alltags{$tag}[-1];
657: if (!$space) {
658: $tag=~tr/A-Z/a-z/;
659: $sub=~tr/A-Z/a-z/;
660: $space=$Apache::lonxml::alltags{$tag}[-1]
661: }
662:
663: my $deleted=0;
664: $Apache::lonxml::curdepth=join('_',@Apache::lonxml::depthcounter);
665: if (($token->[0] eq 'S') && ($target eq 'modified')) {
666: $deleted=&Apache::edit::handle_delete($space,$target,$token,$tagstack,
667: $parstack,$parser,$safeeval,
668: $style);
669: }
670: if (!$deleted) {
671: if ($space) {
672: #&Apache::lonxml::debug("Calling sub $sub in $space $metamode<br />\n");
673: $sub1="$space\:\:$sub";
674: ($currentstring,$nodefault) = &$sub1($target,$token,$tagstack,
675: $parstack,$parser,$safeeval,
676: $style);
677: } else {
678: #&Apache::lonxml::debug("NOT Calling sub $sub in $space $metamode<br />\n");
679: if ($metamode <1) {
680: if (defined($token->[4]) && ($metamode < 1)) {
681: $currentstring = $token->[4];
682: } else {
683: $currentstring = $token->[2];
684: }
685: }
686: }
687: # &Apache::lonxml::debug("nodefalt:$nodefault:");
688: if ($currentstring eq '' && $nodefault eq '') {
689: if ($target eq 'edit') {
690: &Apache::lonxml::debug("doing default edit for $token->[1]");
691: if ($token->[0] eq 'S') {
692: $currentstring = &Apache::edit::tag_start($target,$token);
693: } elsif ($token->[0] eq 'E') {
694: $currentstring = &Apache::edit::tag_end($target,$token);
695: }
696: } elsif ($target eq 'modified') {
697: if ($token->[0] eq 'S') {
698: $currentstring = $token->[4];
699: $currentstring.=&Apache::edit::handle_insert();
700: } else {
701: $currentstring = $token->[2];
702: }
703: }
704: }
705: }
706: use strict 'refs';
707: }
708: return $currentstring;
709: }
710:
711: sub setup_globals {
712: my ($target)=@_;
713: $Apache::lonxml::registered = 0;
714: @Apache::lonxml::pwd=();
715: @Apache::lonxml::extlinks=();
716: if ($target eq 'meta') {
717: $Apache::lonxml::redirection = 0;
718: $Apache::lonxml::metamode = 1;
719: $Apache::lonxml::evaluate = 1;
720: $Apache::lonxml::import = 0;
721: } elsif ($target eq 'answer') {
722: $Apache::lonxml::redirection = 0;
723: $Apache::lonxml::metamode = 1;
724: $Apache::lonxml::evaluate = 1;
725: $Apache::lonxml::import = 1;
726: } elsif ($target eq 'grade') {
727: &startredirection;
728: $Apache::lonxml::metamode = 0;
729: $Apache::lonxml::evaluate = 1;
730: $Apache::lonxml::import = 1;
731: } elsif ($target eq 'modified') {
732: $Apache::lonxml::redirection = 0;
733: $Apache::lonxml::metamode = 0;
734: $Apache::lonxml::evaluate = 0;
735: $Apache::lonxml::import = 0;
736: } elsif ($target eq 'edit') {
737: $Apache::lonxml::redirection = 0;
738: $Apache::lonxml::metamode = 0;
739: $Apache::lonxml::evaluate = 0;
740: $Apache::lonxml::import = 0;
741: } else {
742: $Apache::lonxml::redirection = 0;
743: $Apache::lonxml::metamode = 0;
744: $Apache::lonxml::evaluate = 1;
745: $Apache::lonxml::import = 1;
746: }
747: }
748:
749: sub init_safespace {
750: my ($target,$safeeval,$safehole,$safeinit) = @_;
751: $safeeval->permit("entereval");
752: $safeeval->permit(":base_math");
753: $safeeval->permit("sort");
754: $safeeval->deny(":base_io");
755: $safehole->wrap(\&Apache::scripttag::xmlparse,$safeeval,'&xmlparse');
756: $safehole->wrap(\&Apache::lonnet::EXT,$safeeval,'&EXT');
757:
758: $safehole->wrap(\&Math::Cephes::asin,$safeeval,'&asin');
759: $safehole->wrap(\&Math::Cephes::acos,$safeeval,'&acos');
760: $safehole->wrap(\&Math::Cephes::atan,$safeeval,'&atan');
761: $safehole->wrap(\&Math::Cephes::sinh,$safeeval,'&sinh');
762: $safehole->wrap(\&Math::Cephes::cosh,$safeeval,'&cosh');
763: $safehole->wrap(\&Math::Cephes::tanh,$safeeval,'&tanh');
764: $safehole->wrap(\&Math::Cephes::asinh,$safeeval,'&asinh');
765: $safehole->wrap(\&Math::Cephes::acosh,$safeeval,'&acosh');
766: $safehole->wrap(\&Math::Cephes::atanh,$safeeval,'&atanh');
767: $safehole->wrap(\&Math::Cephes::erf,$safeeval,'&erf');
768: $safehole->wrap(\&Math::Cephes::erfc,$safeeval,'&erfc');
769: $safehole->wrap(\&Math::Cephes::j0,$safeeval,'&j0');
770: $safehole->wrap(\&Math::Cephes::j1,$safeeval,'&j1');
771: $safehole->wrap(\&Math::Cephes::jn,$safeeval,'&jn');
772: $safehole->wrap(\&Math::Cephes::jv,$safeeval,'&jv');
773: $safehole->wrap(\&Math::Cephes::y0,$safeeval,'&y0');
774: $safehole->wrap(\&Math::Cephes::y1,$safeeval,'&y1');
775: $safehole->wrap(\&Math::Cephes::yn,$safeeval,'&yn');
776: $safehole->wrap(\&Math::Cephes::yv,$safeeval,'&yv');
777: $safehole->wrap(\&Math::Random::random_beta,$safeeval,'&math_random_beta');
778: $safehole->wrap(\&Math::Random::random_chi_square,$safeeval,'&math_random_chi_square');
779: $safehole->wrap(\&Math::Random::random_exponential,$safeeval,'&math_random_exponential');
780: $safehole->wrap(\&Math::Random::random_f,$safeeval,'&math_random_f');
781: $safehole->wrap(\&Math::Random::random_gamma,$safeeval,'&math_random_gamma');
782: $safehole->wrap(\&Math::Random::random_multivariate_normal,$safeeval,'&math_random_multivariate_normal');
783: $safehole->wrap(\&Math::Random::random_multinomial,$safeeval,'&math_random_multinomial');
784: $safehole->wrap(\&Math::Random::random_noncentral_chi_square,$safeeval,'&math_random_noncentral_chi_square');
785: $safehole->wrap(\&Math::Random::random_noncentral_f,$safeeval,'&math_random_noncentral_f');
786: $safehole->wrap(\&Math::Random::random_normal,$safeeval,'&math_random_normal');
787: $safehole->wrap(\&Math::Random::random_permutation,$safeeval,'&math_random_permutation');
788: $safehole->wrap(\&Math::Random::random_permuted_index,$safeeval,'&math_random_permuted_index');
789: $safehole->wrap(\&Math::Random::random_uniform,$safeeval,'&math_random_uniform');
790: $safehole->wrap(\&Math::Random::random_poisson,$safeeval,'&math_random_poisson');
791: $safehole->wrap(\&Math::Random::random_uniform_integer,$safeeval,'&math_random_uniform_integer');
792: $safehole->wrap(\&Math::Random::random_negative_binomial,$safeeval,'&math_random_negative_binomial');
793: $safehole->wrap(\&Math::Random::random_binomial,$safeeval,'&math_random_binomial');
794: $safehole->wrap(\&Math::Random::random_seed_from_phrase,$safeeval,'&random_seed_from_phrase');
795: $safehole->wrap(\&Math::Random::random_set_seed_from_phrase,$safeeval,'&random_set_seed_from_phrase');
796: $safehole->wrap(\&Math::Random::random_get_seed,$safeeval,'&random_get_seed');
797: $safehole->wrap(\&Math::Random::random_set_seed,$safeeval,'&random_set_seed');
798:
799: #need to inspect this class of ops
800: # $safeeval->deny(":base_orig");
801: $safeinit .= ';$external::target="'.$target.'";';
802: my $rndseed;
803: my ($symb,$courseid,$domain,$name) = &Apache::lonxml::whichuser();
804: $rndseed=&Apache::lonnet::rndseed($symb,$courseid,$domain,$name);
805: $safeinit .= ';$external::randomseed='.$rndseed.';';
806: &Apache::run::run($safeinit,$safeeval);
807: }
808:
809: sub startredirection {
810: $Apache::lonxml::redirection++;
811: push (@Apache::lonxml::outputstack, '');
812: }
813:
814: sub endredirection {
815: if (!$Apache::lonxml::redirection) {
816: &Apache::lonxml::error("Endredirection was called, before a startredirection, perhaps you have unbalanced tags. Some debuging information:".join ":",caller);
817: return '';
818: }
819: $Apache::lonxml::redirection--;
820: pop @Apache::lonxml::outputstack;
821: }
822:
823: sub end_tag {
824: my ($tagstack,$parstack,$token)=@_;
825: pop(@$tagstack);
826: pop(@$parstack);
827: &decreasedepth($token);
828: }
829:
830: sub initdepth {
831: @Apache::lonxml::depthcounter=();
832: $Apache::lonxml::depth=-1;
833: $Apache::lonxml::olddepth=-1;
834: }
835:
836: sub increasedepth {
837: my ($token) = @_;
838: $Apache::lonxml::depth++;
839: $Apache::lonxml::depthcounter[$Apache::lonxml::depth]++;
840: if ($Apache::lonxml::depthcounter[$Apache::lonxml::depth]==1) {
841: $Apache::lonxml::olddepth=$Apache::lonxml::depth;
842: }
843: my $curdepth=join('_',@Apache::lonxml::depthcounter);
844: &Apache::lonxml::debug("s $Apache::lonxml::depth : $Apache::lonxml::olddepth : $curdepth : $token->[1]\n");
845: #print "<br />s $Apache::lonxml::depth : $Apache::lonxml::olddepth : $curdepth : $token->[1]\n";
846: }
847:
848: sub decreasedepth {
849: my ($token) = @_;
850: $Apache::lonxml::depth--;
851: if ($Apache::lonxml::depth<$Apache::lonxml::olddepth-1) {
852: $#Apache::lonxml::depthcounter--;
853: $Apache::lonxml::olddepth=$Apache::lonxml::depth+1;
854: }
855: if ( $Apache::lonxml::depth < -1) {
856: &Apache::lonxml::warning("Missing tags, unable to properly run file.");
857: $Apache::lonxml::depth='-1';
858: }
859: my $curdepth=join('_',@Apache::lonxml::depthcounter);
860: &Apache::lonxml::debug("e $Apache::lonxml::depth : $Apache::lonxml::olddepth : $token->[1] : $curdepth\n");
861: #print "<br />e $Apache::lonxml::depth : $Apache::lonxml::olddepth : $token->[1] : $curdepth\n";
862: }
863:
864: sub get_all_text {
865:
866: my($tag,$pars)= @_;
867: my $depth=0;
868: my $token;
869: my $result='';
870: if ( $tag =~ m:^/: ) {
871: my $tag=substr($tag,1);
872: # &Apache::lonxml::debug("have:$tag:");
873: while (($depth >=0) && ($token = $pars->get_token)) {
874: # &Apache::lonxml::debug("e token:$token->[0]:$depth:$token->[1]");
875: if (($token->[0] eq 'T')||($token->[0] eq 'C')||($token->[0] eq 'D')) {
876: $result.=$token->[1];
877: } elsif ($token->[0] eq 'PI') {
878: $result.=$token->[2];
879: } elsif ($token->[0] eq 'S') {
880: if ($token->[1] eq $tag) { $depth++; }
881: $result.=$token->[4];
882: } elsif ($token->[0] eq 'E') {
883: if ( $token->[1] eq $tag) { $depth--; }
884: #skip sending back the last end tag
885: if ($depth > -1) { $result.=$token->[2]; } else {
886: $pars->unget_token($token);
887: }
888: }
889: }
890: } else {
891: while ($token = $pars->get_token) {
892: # &Apache::lonxml::debug("s token:$token->[0]:$depth:$token->[1]");
893: if (($token->[0] eq 'T')||($token->[0] eq 'C')||($token->[0] eq 'D')) {
894: $result.=$token->[1];
895: } elsif ($token->[0] eq 'PI') {
896: $result.=$token->[2];
897: } elsif ($token->[0] eq 'S') {
898: if ( $token->[1] eq $tag) {
899: $pars->unget_token($token); last;
900: } else {
901: $result.=$token->[4];
902: }
903: } elsif ($token->[0] eq 'E') {
904: $result.=$token->[2];
905: }
906: }
907: }
908: # &Apache::lonxml::debug("Exit:$result:");
909: return $result
910: }
911:
912: sub newparser {
913: my ($parser,$contentref,$dir) = @_;
914: push (@$parser,HTML::TokeParser->new($contentref));
915: $$parser['-1']->xml_mode('1');
916: if ( $dir eq '' ) {
917: push (@Apache::lonxml::pwd, $Apache::lonxml::pwd[$#Apache::lonxml::pwd]);
918: } else {
919: push (@Apache::lonxml::pwd, $dir);
920: }
921: # &Apache::lonxml::debug("pwd:$#Apache::lonxml::pwd");
922: # &Apache::lonxml::debug("pwd:$Apache::lonxml::pwd[$#Apache::lonxml::pwd]");
923: }
924:
925: sub parstring {
926: my ($token) = @_;
927: my $temp='';
928: foreach (@{$token->[3]}) {
929: unless ($_=~/\W/) {
930: my $val=$token->[2]->{$_};
931: $val =~ s/([\%\@\\])/\\$1/g;
932: #if ($val =~ m/^[\%\@]/) { $val="\\".$val; }
933: $temp .= "my \$$_=\"$val\";"
934: }
935: }
936: return $temp;
937: }
938:
939: sub writeallows {
940: unless ($#extlinks>=0) { return; }
941: my $thisurl='/res/'.&Apache::lonnet::declutter(shift);
942: if ($ENV{'httpref.'.$thisurl}) {
943: $thisurl=$ENV{'httpref.'.$thisurl};
944: }
945: my $thisdir=$thisurl;
946: $thisdir=~s/\/[^\/]+$//;
947: my %httpref=();
948: foreach (@extlinks) {
949: $httpref{'httpref.'.
950: &Apache::lonnet::hreflocation($thisdir,$_)}=$thisurl;
951: }
952: @extlinks=();
953: &Apache::lonnet::appenv(%httpref);
954: }
955:
956: #
957: # Afterburner handles anchors, highlights and links
958: #
959: sub afterburn {
960: my $result=shift;
961: foreach (split(/&/,$ENV{'QUERY_STRING'})) {
962: my ($name, $value) = split(/=/,$_);
963: $value =~ tr/+/ /;
964: $value =~ s/%([a-fA-F0-9][a-fA-F0-9])/pack("C",hex($1))/eg;
965: if (($name eq 'highlight')||($name eq 'anchor')||($name eq 'link')) {
966: unless ($ENV{'form.'.$name}) {
967: $ENV{'form.'.$name}=$value;
968: }
969: }
970: }
971: if ($ENV{'form.highlight'}) {
972: foreach (split(/\,/,$ENV{'form.highlight'})) {
973: my $anchorname=$_;
974: my $matchthis=$anchorname;
975: $matchthis=~s/\_+/\\s\+/g;
976: $result=~s/($matchthis)/\<font color=\"red\"\>$1\<\/font\>/gs;
977: }
978: }
979: if ($ENV{'form.link'}) {
980: foreach (split(/\,/,$ENV{'form.link'})) {
981: my ($anchorname,$linkurl)=split(/\>/,$_);
982: my $matchthis=$anchorname;
983: $matchthis=~s/\_+/\\s\+/g;
984: $result=~s/($matchthis)/\<a href=\"$linkurl\"\>$1\<\/a\>/gs;
985: }
986: }
987: if ($ENV{'form.anchor'}) {
988: my $anchorname=$ENV{'form.anchor'};
989: my $matchthis=$anchorname;
990: $matchthis=~s/\_+/\\s\+/g;
991: $result=~s/($matchthis)/\<a name=\"$anchorname\"\>$1\<\/a\>/s;
992: $result.=(<<"ENDSCRIPT");
993: <script>
994: document.location.hash='$anchorname';
995: </script>
996: ENDSCRIPT
997: }
998: return $result;
999: }
1000:
1001: sub storefile {
1002: my ($file,$contents)=@_;
1003: if (my $fh=Apache::File->new('>'.$file)) {
1004: print $fh $contents;
1005: $fh->close();
1006: }
1007: }
1008:
1009: sub inserteditinfo {
1010: my ($result,$filecontents)=@_;
1011: unless ($filecontents) {
1012: $filecontents=(<<SIMPLECONTENT);
1013: <html>
1014: <head>
1015: <title>
1016: Title of Document Goes Here
1017: </title>
1018: </head>
1019: <body bgcolor="#FFFFFF">
1020:
1021: Body of Document Goes Here
1022:
1023: </body>
1024: </html>
1025: SIMPLECONTENT
1026: }
1027: my $editheader='<a href="#editsection">Edit below</a><hr />';
1028: my $editfooter=(<<ENDFOOTER);
1029: <hr />
1030: <a name="editsection" />
1031: <form method="post">
1032: <textarea cols="80" rows="40" name="filecont">$filecontents</textarea>
1033: <br />
1034: <input type="submit" name="attemptclean"
1035: value="Save and then attempt to clean HTML" />
1036: <input type="submit" name="savethisfile" value="Save this" />
1037: </form>
1038: ENDFOOTER
1039: $result=~s/(\<body[^\>]*\>)/$1$editheader/is;
1040: $result=~s/(\<\/body\>)/$editfooter/is;
1041: return $result;
1042: }
1043:
1044: sub handler {
1045: my $request=shift;
1046:
1047: my $target='web';
1048:
1049: $Apache::lonxml::debug=0;
1050:
1051: if ($ENV{'browser.mathml'}) {
1052: $request->content_type('text/xml');
1053: } else {
1054: $request->content_type('text/html');
1055: }
1056: &Apache::loncommon::no_cache($request);
1057: $request->send_http_header;
1058:
1059: return OK if $request->header_only;
1060:
1061:
1062: my $file=&Apache::lonnet::filelocation("",$request->uri);
1063: #
1064: # Edit action? Save file.
1065: #
1066: unless ($ENV{'request.state'} eq 'published') {
1067: if (($ENV{'form.savethisfile'}) || ($ENV{'form.attemptclean'})) {
1068: &storefile($file,$ENV{'form.filecont'});
1069: }
1070: }
1071: my %mystyle;
1072: my $result = '';
1073: my $filecontents=&Apache::lonnet::getfile($file);
1074: if ($filecontents == -1) {
1075: $result=(<<ENDNOTFOUND);
1076: <html>
1077: <head>
1078: <title>File not found</title>
1079: </head>
1080: <body bgcolor="#FFFFFF">
1081: <b>File not found: $file</b>
1082: </body>
1083: </html>
1084: ENDNOTFOUND
1085: $filecontents='';
1086: } else {
1087: unless ($ENV{'request.state'} eq 'published') {
1088: if ($ENV{'form.attemptclean'}) {
1089: $filecontents=&htmlclean($filecontents,1);
1090: }
1091: }
1092: $result = &Apache::lonxml::xmlparse($target,$filecontents,'',%mystyle);
1093: }
1094:
1095: #
1096: # Edit action? Insert editing commands
1097: #
1098: unless ($ENV{'request.state'} eq 'published') {
1099: $result=&inserteditinfo($result,$filecontents);
1100: }
1101:
1102: writeallows($request->uri);
1103:
1104: $request->print($result);
1105:
1106: return OK;
1107: }
1108:
1109: sub debug {
1110: if ($Apache::lonxml::debug eq 1) {
1111: print("DEBUG:".$_[0]."<br />\n");
1112: }
1113: }
1114:
1115: sub error {
1116: if (($Apache::lonxml::debug eq 1) || ($ENV{'request.state'} eq 'construct') ) {
1117: print "<b>ERROR:</b>".$_[0]."<br />\n";
1118: } else {
1119: print "<b>An Error occured while processing this resource. The instructor has been notified.</b> <br />";
1120: #notify author
1121: &Apache::lonmsg::author_res_msg($ENV{'request.filename'},$_[0]);
1122: #notify course
1123: if ( $ENV{'request.course.id'} ) {
1124: my $users=$ENV{'course.'.$ENV{'request.course.id'}.'.comment.email'};
1125: foreach my $user (split /\,/, $users) {
1126: ($user,my $domain) = split /:/, $user;
1127: &Apache::lonmsg::user_normal_msg($user,$domain,"Error in $ENV{'request.filename'}",$_[0]);
1128: }
1129: }
1130:
1131: #FIXME probably shouldn't have me get everything forever.
1132: &Apache::lonmsg::user_normal_msg('albertel','msu',"Error in $ENV{'request.filename'}",$_[0]);
1133: #&Apache::lonmsg::user_normal_msg('albertel','103',"Error in $ENV{'request.filename'}",$_[0]);
1134: }
1135: }
1136:
1137: sub warning {
1138: if ($ENV{'request.state'} eq 'construct') {
1139: print "<b>W</b>ARNING<b>:</b>".$_[0]."<br />\n";
1140: }
1141: }
1142:
1143: sub get_param {
1144: my ($param,$parstack,$safeeval,$context) = @_;
1145: if ( ! $context ) { $context = -1; }
1146: my $args ='';
1147: if ( $#$parstack > (-2-$context) ) { $args=$$parstack[$context]; }
1148: if ( $args =~ /my \$$param=\"/ ) {
1149: return &Apache::run::run("{$args;".'return $'.$param.'}',$safeeval); #'
1150: } else {
1151: return undef;
1152: }
1153: }
1154:
1155: sub get_param_var {
1156: my ($param,$parstack,$safeeval,$context) = @_;
1157: if ( ! $context ) { $context = -1; }
1158: my $args ='';
1159: if ( $#$parstack > (-2-$context) ) { $args=$$parstack[$context]; }
1160: if ( $args !~ /my \$$param=\"/ ) { return undef; }
1161: my $value=&Apache::run::run("{$args;".'return $'.$param.'}',$safeeval); #'
1162: if ($value =~ /^[\$\@\%]/) {
1163: return &Apache::run::run("return $value",$safeeval,1);
1164: } else {
1165: return $value;
1166: }
1167: }
1168:
1169: sub register_insert {
1170: my @data = split /\n/, &Apache::lonnet::getfile('/home/httpd/lonTabs/insertlist.tab');
1171: my $i;
1172: my $tagnum=0;
1173: my @order;
1174: for ($i=0;$i < $#data; $i++) {
1175: my $line = $data[$i];
1176: if ( $line =~ /^\#/ || $line =~ /^\s*\n/) { next; }
1177: if ( $line =~ /TABLE/ ) { last; }
1178: my ($tag,$descrip,$color,$function,$show) = split(/,/, $line);
1179: if ($tag) {
1180: $insertlist{"$tagnum.tag"} = $tag;
1181: $insertlist{"$tagnum.description"} = $descrip;
1182: $insertlist{"$tagnum.color"} = $color;
1183: $insertlist{"$tagnum.function"} = $function;
1184: if (!defined($show)) { $show='yes'; }
1185: $insertlist{"$tagnum.show"}= $show;
1186: $insertlist{"$tag.num"}=$tagnum;
1187: $tagnum++;
1188: }
1189: }
1190: $i++; #skipping TABLE line
1191: $tagnum = 0;
1192: for (;$i < $#data;$i++) {
1193: my $line = $data[$i];
1194: my ($mnemonic,@which) = split(/ +/,$line);
1195: my $tag = $insertlist{"$tagnum.tag"};
1196: for (my $j=0;$j <$#which;$j++) {
1197: if ( $which[$j] eq 'Y' ) {
1198: if ($insertlist{"$j.show"} ne 'no') {
1199: push(@{ $insertlist{"$tag.which"} },$j);
1200: }
1201: }
1202: }
1203: $tagnum++;
1204: }
1205: }
1206:
1207: sub description {
1208: my ($token)=@_;
1209: my $tagnum;
1210: my $tag=$token->[1];
1211: foreach my $namespace (reverse @Apache::lonxml::namespace) {
1212: my $testtag=$namespace.'::'.$tag;
1213: $tagnum=$insertlist{"$testtag.num"};
1214: if (defined($tagnum)) { last; }
1215: }
1216: if (!defined ($tagnum)) { $tagnum=$Apache::lonxml::insertlist{"$tag.num"}; }
1217: return $insertlist{$tagnum.'.description'};
1218: }
1219:
1220: # ----------------------------------------------------------------- whichuser
1221: # returns a list of $symb, $courseid, $domain, $name that is correct for
1222: # calls to lonnet functions for this setup.
1223: # - looks for form.grade_ parameters
1224: sub whichuser {
1225: my ($symb,$courseid,$domain,$name);
1226: if (defined($ENV{'form.grade_symb'})) {
1227: my $tmp_courseid=$ENV{'form.grade_courseid'};
1228: my $allowed=&Apache::lonnet::allowed('mgr',$tmp_courseid);
1229: if ($allowed) {
1230: $symb=$ENV{'form.grade_symb'};
1231: $courseid=$ENV{'form.grade_courseid'};
1232: $domain=$ENV{'form.grade_domain'};
1233: $name=$ENV{'form.grade_username'};
1234: }
1235: } else {
1236: $symb=&Apache::lonnet::symbread();
1237: $courseid=$ENV{'request.course.id'};
1238: $domain=$ENV{'user.domain'};
1239: $name=$ENV{'user.name'};
1240: }
1241: return ($symb,$courseid,$domain,$name);
1242: }
1243:
1244: 1;
1245: __END__
1246:
1247:
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