1: # The LearningOnline Network with CAPA
2: # XML Parser Module
3: #
4: # $Id: lonxml.pm,v 1.144 2002/01/02 13:18:26 matthew 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: # Dec Guy Albertelli
55: # YEAR=2002
56: # 1/1 Gerd Kortemeyer
57: #
58:
59: package Apache::lonxml;
60: use vars
61: qw(@pwd @outputstack $redirection $import @extlinks $metamode $evaluate %insertlist @namespace);
62: use strict;
63: use HTML::TokeParser;
64: use HTML::TreeBuilder;
65: use Safe;
66: use Safe::Hole;
67: use Math::Cephes qw(:trigs :hypers :bessels erf erfc);
68: use Math::Random qw(:all);
69: use Opcode;
70:
71: sub register {
72: my ($space,@taglist) = @_;
73: foreach my $temptag (@taglist) {
74: push(@{ $Apache::lonxml::alltags{$temptag} },$space);
75: }
76: }
77:
78: sub deregister {
79: my ($space,@taglist) = @_;
80: foreach my $temptag (@taglist) {
81: my $tempspace = $Apache::lonxml::alltags{$temptag}[-1];
82: if ($tempspace eq $space) {
83: pop(@{ $Apache::lonxml::alltags{$temptag} });
84: }
85: }
86: #&printalltags();
87: }
88:
89: use Apache::Constants qw(:common);
90: use Apache::lontexconvert;
91: use Apache::style;
92: use Apache::run;
93: use Apache::londefdef;
94: use Apache::scripttag;
95: use Apache::edit;
96: use Apache::lonnet;
97: use Apache::File;
98: use Apache::loncommon;
99:
100: #================================================== Main subroutine: xmlparse
101: #debugging control, to turn on debugging modify the correct handler
102: $Apache::lonxml::debug=0;
103:
104: #path to the directory containing the file currently being processed
105: @pwd=();
106:
107: #these two are used for capturing a subset of the output for later processing,
108: #don't touch them directly use &startredirection and &endredirection
109: @outputstack = ();
110: $redirection = 0;
111:
112: #controls wheter the <import> tag actually does
113: $import = 1;
114: @extlinks=();
115:
116: # meta mode is a bit weird only some output is to be turned off
117: #<output> tag turns metamode off (defined in londefdef.pm)
118: $metamode = 0;
119:
120: # turns on and of run::evaluate actually derefencing var refs
121: $evaluate = 1;
122:
123: # data structure for eidt mode, determines what tags can go into what other tags
124: %insertlist=();
125:
126: # stores the list of active tag namespaces
127: @namespace=();
128:
129: # has the dynamic menu been updated to know about this resource
130: $Apache::lonxml::registered=0;
131:
132: sub xmlbegin {
133: my $output='';
134: if ($ENV{'browser.mathml'}) {
135: $output='<?xml version="1.0"?>'
136: .'<?xml-stylesheet type="text/css" href="/adm/MathML/mathml.css"?>'
137: .'<!DOCTYPE html SYSTEM "/adm/MathML/mathml.dtd" '
138: .'[<!ENTITY mathns "http://www.w3.org/1998/Math/MathML">]>'
139: .'<html xmlns:math="http://www.w3.org/1998/Math/MathML" '
140: .'xmlns="http://www.w3.org/TR/REC-html40">';
141: } else {
142: $output='<html>';
143: }
144: return $output;
145: }
146:
147: sub xmlend {
148: my $discussion='';
149: if ($ENV{'request.course.id'}) {
150: my $crs='/'.$ENV{'request.course.id'};
151: if ($ENV{'request.course.sec'}) {
152: $crs.='_'.$ENV{'request.course.sec'};
153: }
154: $crs=~s/\_/\//g;
155: my $seeid=&Apache::lonnet::allowed('rin',$crs);
156: my $symb=&Apache::lonnet::symbread();
157: if ($symb) {
158: my %contrib=&Apache::lonnet::restore($symb,$ENV{'request.course.id'},
159: $ENV{'course.'.$ENV{'request.course.id'}.'.domain'},
160: $ENV{'course.'.$ENV{'request.course.id'}.'.num'});
161: if ($contrib{'version'}) {
162: $discussion.=
163: '<address><hr /><h2>Course Discussion of Resource</h2>';
164: my $idx;
165: for ($idx=1;$idx<=$contrib{'version'};$idx++) {
166: my $hidden=($contrib{'hidden'}=~/\.$idx\./);
167: unless (($hidden) && (!$seeid)) {
168: my $message=$contrib{$idx.':message'};
169: $message=~s/\n/\<br \/\>/g;
170: if ($message) {
171: if ($hidden) {
172: $message='<font color="#888888">'.$message.'</font>';
173: }
174: my $sender='Anonymous';
175: if ((!$contrib{$idx.':anonymous'}) || ($seeid)) {
176: $sender=$contrib{$idx.':sendername'}.' at '.
177: $contrib{$idx.':senderdomain'};
178: if ($contrib{$idx.':anonymous'}) {
179: $sender.=' (anonymous)';
180: }
181: if ($seeid) {
182: if ($hidden) {
183: $sender.=' <a href="/adm/feedback?unhide='.
184: $symb.':::'.$idx.'">Make Visible</a>';
185: } else {
186: $sender.=' <a href="/adm/feedback?hide='.
187: $symb.':::'.$idx.'">Hide</a>';
188: }
189: }
190: }
191: $discussion.='<p><b>'.$sender.'</b> ('.
192: localtime($contrib{$idx.':timestamp'}).
193: '):<blockquote>'.$message.
194: '</blockquote></p>';
195: }
196: }
197: }
198: $discussion.='</address>';
199: }
200: }
201: }
202: return $discussion.'</html>';
203: }
204:
205: sub tokeninputfield {
206: my $defhost=$Apache::lonnet::perlvar{'lonHostID'};
207: $defhost=~tr/a-z/A-Z/;
208: return (<<ENDINPUTFIELD)
209: <script>
210: function updatetoken() {
211: var comp=new Array;
212: var barcode=unescape(document.tokeninput.barcode.value);
213: comp=barcode.split('*');
214: if (typeof(comp[0])!="undefined") {
215: document.tokeninput.codeone.value=comp[0];
216: }
217: if (typeof(comp[1])!="undefined") {
218: document.tokeninput.codetwo.value=comp[1];
219: }
220: if (typeof(comp[2])!="undefined") {
221: comp[2]=comp[2].toUpperCase();
222: document.tokeninput.codethree.value=comp[2];
223: }
224: document.tokeninput.barcode.value='';
225: }
226: </script>
227: <form method="post" name="tokeninput">
228: <table border="2" bgcolor="#FFFFBB">
229: <tr><th>DocID Checkin</th></tr>
230: <tr><td>
231: <table>
232: <tr>
233: <td>Scan in Barcode</td>
234: <td><input type="text" size="22" name="barcode"
235: onChange="updatetoken()"/></td>
236: </tr>
237: <tr><td><i>or</i> Type in DocID</td>
238: <td>
239: <input type="text" size="5" name="codeone" />
240: <b><font size="+2">*</font></b>
241: <input type="text" size="5" name="codetwo" />
242: <b><font size="+2">*</font></b>
243: <input type="text" size="10" name="codethree" value="$defhost"
244: onChange="this.value=this.value.toUpperCase()" />
245: </td></tr>
246: </table>
247: </td></tr>
248: <tr><td><input type="submit" value="Check in DocID" /></td></tr>
249: </table>
250: </form>
251: ENDINPUTFIELD
252: }
253:
254: sub maketoken {
255: my ($symb,$tuname,$tudom,$tcrsid)=@_;
256: unless ($symb) {
257: $symb=&Apache::lonnet::symbread();
258: }
259: unless ($tuname) {
260: $tuname=$ENV{'user.name'};
261: $tudom=$ENV{'user.domain'};
262: $tcrsid=$ENV{'request.course.id'};
263: }
264:
265: return &Apache::lonnet::checkout($symb,$tuname,$tudom,$tcrsid);
266: }
267:
268: sub printtokenheader {
269: my ($target,$token,$tsymb,$tcrsid,$tudom,$tuname)=@_;
270: unless ($token) { return ''; }
271:
272: my ($symb,$courseid,$domain,$name) = &Apache::lonxml::whichuser();
273: unless ($tsymb) {
274: $tsymb=$symb;
275: }
276: unless ($tuname) {
277: $tuname=$name;
278: $tudom=$domain;
279: $tcrsid=$courseid;
280: }
281:
282: my %reply=&Apache::lonnet::get('environment',
283: ['firstname','middlename','lastname','generation'],
284: $tudom,$tuname);
285: my $plainname=$reply{'firstname'}.' '.
286: $reply{'middlename'}.' '.
287: $reply{'lastname'}.' '.
288: $reply{'generation'};
289:
290: if ($target eq 'web') {
291: return
292: '<img align="right" src="/cgi-bin/barcode.gif?encode='.$token.'" />'.
293: 'Checked out for '.$plainname.
294: '<br />User: '.$tuname.' at '.$tudom.
295: '<br />CourseID: '.$tcrsid.
296: '<br />DocID: '.$token.
297: '<br />Time: '.localtime().'<hr />';
298: } else {
299: return $token;
300: }
301: }
302:
303: sub fontsettings() {
304: my $headerstring='';
305: if (($ENV{'browser.os'} eq 'mac') && (!$ENV{'browser.mathml'})) {
306: $headerstring.=
307: '<meta Content-Type="text/html; charset=x-mac-roman">';
308: }
309: return $headerstring;
310: }
311:
312: sub registerurl {
313: my $forcereg=shift;
314: if ($ENV{'request.publicaccess'}) {
315: return
316: '<script>function LONCAPAreg(){} function LONCAPAstale(){}</script>';
317: }
318: if ($Apache::lonxml::registered && !$forcereg) { return ''; }
319: $Apache::lonxml::registered=1;
320: if (($ENV{'REQUEST_URI'}!~/^\/(res\/)*adm\//) || ($forcereg)) {
321: my $hwkadd='';
322: if ($ENV{'REQUEST_URI'}=~/\.(problem|exam|quiz|assess|survey|form)$/) {
323: if (&Apache::lonnet::allowed('vgr',$ENV{'request.course.id'})) {
324: $hwkadd.=(<<ENDSUBM);
325: menu.switchbutton
326: (7,1,'subm.gif','view sub','missions',
327: 'gocmd("/adm/grades","submission")');
328: ENDSUBM
329: }
330: if (&Apache::lonnet::allowed('mgr',$ENV{'request.course.id'})) {
331: $hwkadd.=(<<ENDGRDS);
332: menu.switchbutton
333: (7,2,'pgrd.gif','problem','grades',
334: 'gocmd("/adm/grades","viewgrades")');
335: ENDGRDS
336: }
337: if (&Apache::lonnet::allowed('opa',$ENV{'request.course.id'})) {
338: $hwkadd.=(<<ENDPARM);
339: menu.switchbutton
340: (7,3,'pparm.gif','problem','parms',
341: 'gocmd("/adm/parmset","set")');
342: ENDPARM
343: }
344: }
345: return (<<ENDREGTHIS);
346:
347: <script language="JavaScript">
348: // BEGIN LON-CAPA Internal
349:
350: function LONCAPAreg() {
351: menu=window.open("","LONCAPAmenu");
352: menu.clearTimeout(menu.menucltim);
353: menu.currentURL=window.location.pathname;
354: menu.currentStale=0;
355: menu.clearbut(3,1);
356: menu.switchbutton
357: (6,3,'catalog.gif','catalog','info','catalog_info()');
358: menu.switchbutton
359: (8,1,'eval.gif','evaluate','this','gopost("/adm/evaluate",currentURL)');
360: menu.switchbutton
361: (8,2,'fdbk.gif','feedback','on this','gopost("/adm/feedback",currentURL)');
362: menu.switchbutton
363: (8,3,'prt.gif','prepare','printout','gopost("/adm/printout",currentURL)');
364: menu.switchbutton
365: (2,1,'back.gif','backward','','gopost("/adm/flip","back:"+currentURL)');
366: menu.switchbutton
367: (2,3,'forw.gif','forward','','gopost("/adm/flip","forward:"+currentURL)');
368: menu.switchbutton
369: (9,1,'sbkm.gif','set','bookmark','set_bookmark()');
370: menu.switchbutton
371: (9,2,'vbkm.gif','view','bookmark','edit_bookmarks()');
372: menu.switchbutton
373: (9,3,'anot.gif','anno-','tations','annotate()');
374: $hwkadd
375: }
376:
377: function LONCAPAstale() {
378: menu=window.open("","LONCAPAmenu");
379: menu.currentStale=1;
380: menu.switchbutton
381: (3,1,'reload.gif','return','location','go(currentURL)');
382: menu.clearbut(7,1);
383: menu.clearbut(7,2);
384: menu.clearbut(7,3);
385: menu.menucltim=menu.setTimeout(
386: 'clearbut(2,1);clearbut(2,3);clearbut(8,1);clearbut(8,2);clearbut(8,3);'+
387: 'clearbut(9,1);clearbut(9,2);clearbut(9,3);clearbut(6,3)',
388: 2000);
389:
390: }
391:
392: // END LON-CAPA Internal
393: </script>
394: ENDREGTHIS
395:
396: } else {
397: return (<<ENDDONOTREGTHIS);
398:
399: <script language="JavaScript">
400: // BEGIN LON-CAPA Internal
401:
402: function LONCAPAreg() {
403: menu=window.open("","LONCAPAmenu");
404: menu.currentStale=1;
405: menu.clearbut(2,1);
406: menu.clearbut(2,3);
407: menu.clearbut(8,1);
408: menu.clearbut(8,2);
409: menu.clearbut(8,3);
410: if (menu.currentURL) {
411: menu.switchbutton
412: (3,1,'reload.gif','return','location','go(currentURL)');
413: } else {
414: menu.clearbut(3,1);
415: }
416: }
417:
418: function LONCAPAstale() {
419: }
420:
421: // END LON-CAPA Internal
422: </script>
423: ENDDONOTREGTHIS
424:
425: }
426: }
427:
428: sub loadevents() {
429: return 'LONCAPAreg();';
430: }
431:
432: sub unloadevents() {
433: return 'LONCAPAstale();';
434: }
435:
436: sub printalltags {
437: my $temp;
438: foreach $temp (sort keys %Apache::lonxml::alltags) {
439: &Apache::lonxml::debug("$temp -- ".
440: join(',',@{ $Apache::lonxml::alltags{$temp} }));
441: }
442: }
443:
444: sub xmlparse {
445: my ($target,$content_file_string,$safeinit,%style_for_target) = @_;
446:
447: &setup_globals($target);
448: #&printalltags();
449: my @pars = ();
450: my $pwd=$ENV{'request.filename'};
451: $pwd =~ s:/[^/]*$::;
452: &newparser(\@pars,\$content_file_string,$pwd);
453:
454: my $safeeval = new Safe;
455: my $safehole = new Safe::Hole;
456: &init_safespace($target,$safeeval,$safehole,$safeinit);
457: #-------------------- Redefinition of the target in the case of compound target
458:
459: ($target, my @tenta) = split('&&',$target);
460:
461: my @stack = ();
462: my @parstack = ();
463: &initdepth;
464:
465: my $finaloutput = &inner_xmlparse($target,\@stack,\@parstack,\@pars,
466: $safeeval,\%style_for_target);
467: if ($ENV{'request.uri'}) {
468: &writeallows($ENV{'request.uri'});
469: }
470: return $finaloutput;
471: }
472:
473: sub htmlclean {
474: my ($raw,$full)=@_;
475:
476: my $tree = HTML::TreeBuilder->new;
477: $tree->ignore_unknown(0);
478:
479: $tree->parse($raw);
480:
481: my $output= $tree->as_HTML(undef,' ');
482:
483: $output=~s/\<(br|hr|img|meta|allow)([^\>\/]*)\>/\<$1$2 \/\>/gis;
484: $output=~s/\<\/(br|hr|img|meta|allow)\>//gis;
485: unless ($full) {
486: $output=~s/\<[\/]*(body|head|html)\>//gis;
487: }
488:
489: $tree = $tree->delete;
490:
491: return $output;
492: }
493:
494: sub inner_xmlparse {
495: my ($target,$stack,$parstack,$pars,$safeeval,$style_for_target)=@_;
496: my $finaloutput = '';
497: my $result;
498: my $token;
499: while ( $#$pars > -1 ) {
500: while ($token = $$pars['-1']->get_token) {
501: if (($token->[0] eq 'T') || ($token->[0] eq 'C') || ($token->[0] eq 'D') ) {
502: if ($metamode<1) {
503: $result=$token->[1];
504: }
505: } elsif ($token->[0] eq 'PI') {
506: if ($metamode<1) {
507: $result=$token->[2];
508: }
509: } elsif ($token->[0] eq 'S') {
510: # add tag to stack
511: push (@$stack,$token->[1]);
512: # add parameters list to another stack
513: push (@$parstack,&parstring($token));
514: &increasedepth($token);
515: if (exists $$style_for_target{$token->[1]}) {
516: if ($Apache::lonxml::redirection) {
517: $Apache::lonxml::outputstack['-1'] .=
518: &recurse($$style_for_target{$token->[1]},$target,$safeeval,
519: $style_for_target,@$parstack);
520: } else {
521: $finaloutput .= &recurse($$style_for_target{$token->[1]},$target,
522: $safeeval,$style_for_target,@$parstack);
523: }
524: } else {
525: $result = &callsub("start_$token->[1]", $target, $token, $stack,
526: $parstack, $pars, $safeeval, $style_for_target);
527: }
528: } elsif ($token->[0] eq 'E') {
529: #clear out any tags that didn't end
530: while ($token->[1] ne $$stack['-1'] && ($#$stack > -1)) {
531: &Apache::lonxml::warning('Missing tag </'.$$stack['-1'].'> in file');
532: &end_tag($stack,$parstack,$token);
533: }
534:
535: if (exists($$style_for_target{'/'."$token->[1]"})) {
536: if ($Apache::lonxml::redirection) {
537: $Apache::lonxml::outputstack['-1'] .=
538: &recurse($$style_for_target{'/'."$token->[1]"},
539: $target,$safeeval,$style_for_target,@$parstack);
540: } else {
541: $finaloutput .= &recurse($$style_for_target{'/'."$token->[1]"},
542: $target,$safeeval,$style_for_target,
543: @$parstack);
544: }
545: } else {
546: $result = &callsub("end_$token->[1]", $target, $token, $stack,
547: $parstack, $pars,$safeeval, $style_for_target);
548: }
549: } else {
550: &Apache::lonxml::error("Unknown token event :$token->[0]:$token->[1]:");
551: }
552: #evaluate variable refs in result
553: if ($result ne "") {
554: if ( $#$parstack > -1 ) {
555: if ($Apache::lonxml::redirection) {
556: $Apache::lonxml::outputstack['-1'] .=
557: &Apache::run::evaluate($result,$safeeval,$$parstack['-1']);
558: } else {
559: $finaloutput .= &Apache::run::evaluate($result,$safeeval,
560: $$parstack['-1']);
561: }
562: } else {
563: $finaloutput .= &Apache::run::evaluate($result,$safeeval,'');
564: }
565: $result = '';
566: }
567: if ($token->[0] eq 'E') {
568: &end_tag($stack,$parstack,$token);
569: }
570: }
571: pop @$pars;
572: pop @Apache::lonxml::pwd;
573: }
574:
575: # if ($target eq 'meta') {
576: # $finaloutput.=&endredirection;
577: # }
578:
579: if (($ENV{'QUERY_STRING'}) && ($target eq 'web')) {
580: $finaloutput=&afterburn($finaloutput);
581: }
582: return $finaloutput;
583: }
584:
585: sub recurse {
586: my @innerstack = ();
587: my @innerparstack = ();
588: my ($newarg,$target,$safeeval,$style_for_target,@parstack) = @_;
589: my @pat = ();
590: &newparser(\@pat,\$newarg);
591: my $tokenpat;
592: my $partstring = '';
593: my $output='';
594: my $decls='';
595: &Apache::lonxml::debug("Recursing");
596: while ( $#pat > -1 ) {
597: while ($tokenpat = $pat[$#pat]->get_token) {
598: if (($tokenpat->[0] eq 'T') || ($tokenpat->[0] eq 'C') || ($tokenpat->[0] eq 'D') ) {
599: if ($metamode<1) { $partstring=$tokenpat->[1]; }
600: } elsif ($tokenpat->[0] eq 'PI') {
601: if ($metamode<1) { $partstring=$tokenpat->[2]; }
602: } elsif ($tokenpat->[0] eq 'S') {
603: push (@innerstack,$tokenpat->[1]);
604: push (@innerparstack,&parstring($tokenpat));
605: &increasedepth($tokenpat);
606: $partstring = &callsub("start_$tokenpat->[1]", $target, $tokenpat,
607: \@innerstack, \@innerparstack, \@pat,
608: $safeeval, $style_for_target);
609: } elsif ($tokenpat->[0] eq 'E') {
610: #clear out any tags that didn't end
611: while ($tokenpat->[1] ne $innerstack[$#innerstack]
612: && ($#innerstack > -1)) {
613: &Apache::lonxml::warning('Missing tag </'.$innerstack['-1'].'> in style');
614: &end_tag(\@innerstack,\@innerparstack,$tokenpat);
615: }
616: $partstring = &callsub("end_$tokenpat->[1]", $target, $tokenpat,
617: \@innerstack, \@innerparstack, \@pat,
618: $safeeval, $style_for_target);
619: } else {
620: &Apache::lonxml::error("Unknown token event :$tokenpat->[0]:$tokenpat->[1]:");
621: }
622: #pass both the variable to the style tag, and the tag we
623: #are processing inside the <definedtag>
624: if ( $partstring ne "" ) {
625: if ( $#parstack > -1 ) {
626: if ( $#innerparstack > -1 ) {
627: $decls= $parstack[$#parstack].$innerparstack[$#innerparstack];
628: } else {
629: $decls= $parstack[$#parstack];
630: }
631: } else {
632: if ( $#innerparstack > -1 ) {
633: $decls=$innerparstack[$#innerparstack];
634: } else {
635: $decls='';
636: }
637: }
638: $output .= &Apache::run::evaluate($partstring,$safeeval,$decls);
639: $partstring = '';
640: }
641: if ($tokenpat->[0] eq 'E') { pop @innerstack;pop @innerparstack;
642: &decreasedepth($tokenpat);}
643: }
644: pop @pat;
645: pop @Apache::lonxml::pwd;
646: }
647: &Apache::lonxml::debug("Exiting Recursing");
648: return $output;
649: }
650:
651: sub callsub {
652: my ($sub,$target,$token,$tagstack,$parstack,$parser,$safeeval,$style)=@_;
653: my $currentstring='';
654: my $nodefault;
655: {
656: my $sub1;
657: no strict 'refs';
658: my $tag=$token->[1];
659: my $space=$Apache::lonxml::alltags{$tag}[-1];
660: if (!$space) {
661: $tag=~tr/A-Z/a-z/;
662: $sub=~tr/A-Z/a-z/;
663: $space=$Apache::lonxml::alltags{$tag}[-1]
664: }
665:
666: my $deleted=0;
667: $Apache::lonxml::curdepth=join('_',@Apache::lonxml::depthcounter);
668: if (($token->[0] eq 'S') && ($target eq 'modified')) {
669: $deleted=&Apache::edit::handle_delete($space,$target,$token,$tagstack,
670: $parstack,$parser,$safeeval,
671: $style);
672: }
673: if (!$deleted) {
674: if ($space) {
675: #&Apache::lonxml::debug("Calling sub $sub in $space $metamode<br />\n");
676: $sub1="$space\:\:$sub";
677: ($currentstring,$nodefault) = &$sub1($target,$token,$tagstack,
678: $parstack,$parser,$safeeval,
679: $style);
680: } else {
681: #&Apache::lonxml::debug("NOT Calling sub $sub in $space $metamode<br />\n");
682: if ($metamode <1) {
683: if (defined($token->[4]) && ($metamode < 1)) {
684: $currentstring = $token->[4];
685: } else {
686: $currentstring = $token->[2];
687: }
688: }
689: }
690: # &Apache::lonxml::debug("nodefalt:$nodefault:");
691: if ($currentstring eq '' && $nodefault eq '') {
692: if ($target eq 'edit') {
693: &Apache::lonxml::debug("doing default edit for $token->[1]");
694: if ($token->[0] eq 'S') {
695: $currentstring = &Apache::edit::tag_start($target,$token);
696: } elsif ($token->[0] eq 'E') {
697: $currentstring = &Apache::edit::tag_end($target,$token);
698: }
699: } elsif ($target eq 'modified') {
700: if ($token->[0] eq 'S') {
701: $currentstring = $token->[4];
702: $currentstring.=&Apache::edit::handle_insert();
703: } else {
704: $currentstring = $token->[2];
705: }
706: }
707: }
708: }
709: use strict 'refs';
710: }
711: return $currentstring;
712: }
713:
714: sub setup_globals {
715: my ($target)=@_;
716: $Apache::lonxml::registered = 0;
717: @Apache::lonxml::pwd=();
718: @Apache::lonxml::extlinks=();
719: if ($target eq 'meta') {
720: $Apache::lonxml::redirection = 0;
721: $Apache::lonxml::metamode = 1;
722: $Apache::lonxml::evaluate = 1;
723: $Apache::lonxml::import = 0;
724: } elsif ($target eq 'answer') {
725: $Apache::lonxml::redirection = 0;
726: $Apache::lonxml::metamode = 1;
727: $Apache::lonxml::evaluate = 1;
728: $Apache::lonxml::import = 1;
729: } elsif ($target eq 'grade') {
730: &startredirection;
731: $Apache::lonxml::metamode = 0;
732: $Apache::lonxml::evaluate = 1;
733: $Apache::lonxml::import = 1;
734: } elsif ($target eq 'modified') {
735: $Apache::lonxml::redirection = 0;
736: $Apache::lonxml::metamode = 0;
737: $Apache::lonxml::evaluate = 0;
738: $Apache::lonxml::import = 0;
739: } elsif ($target eq 'edit') {
740: $Apache::lonxml::redirection = 0;
741: $Apache::lonxml::metamode = 0;
742: $Apache::lonxml::evaluate = 0;
743: $Apache::lonxml::import = 0;
744: } else {
745: $Apache::lonxml::redirection = 0;
746: $Apache::lonxml::metamode = 0;
747: $Apache::lonxml::evaluate = 1;
748: $Apache::lonxml::import = 1;
749: }
750: }
751:
752: sub init_safespace {
753: my ($target,$safeeval,$safehole,$safeinit) = @_;
754: $safeeval->permit("entereval");
755: $safeeval->permit(":base_math");
756: $safeeval->permit("sort");
757: $safeeval->deny(":base_io");
758: $safehole->wrap(\&Apache::scripttag::xmlparse,$safeeval,'&xmlparse');
759: $safehole->wrap(\&Apache::lonnet::EXT,$safeeval,'&EXT');
760:
761: $safehole->wrap(\&Math::Cephes::asin,$safeeval,'&asin');
762: $safehole->wrap(\&Math::Cephes::acos,$safeeval,'&acos');
763: $safehole->wrap(\&Math::Cephes::atan,$safeeval,'&atan');
764: $safehole->wrap(\&Math::Cephes::sinh,$safeeval,'&sinh');
765: $safehole->wrap(\&Math::Cephes::cosh,$safeeval,'&cosh');
766: $safehole->wrap(\&Math::Cephes::tanh,$safeeval,'&tanh');
767: $safehole->wrap(\&Math::Cephes::asinh,$safeeval,'&asinh');
768: $safehole->wrap(\&Math::Cephes::acosh,$safeeval,'&acosh');
769: $safehole->wrap(\&Math::Cephes::atanh,$safeeval,'&atanh');
770: $safehole->wrap(\&Math::Cephes::erf,$safeeval,'&erf');
771: $safehole->wrap(\&Math::Cephes::erfc,$safeeval,'&erfc');
772: $safehole->wrap(\&Math::Cephes::j0,$safeeval,'&j0');
773: $safehole->wrap(\&Math::Cephes::j1,$safeeval,'&j1');
774: $safehole->wrap(\&Math::Cephes::jn,$safeeval,'&jn');
775: $safehole->wrap(\&Math::Cephes::jv,$safeeval,'&jv');
776: $safehole->wrap(\&Math::Cephes::y0,$safeeval,'&y0');
777: $safehole->wrap(\&Math::Cephes::y1,$safeeval,'&y1');
778: $safehole->wrap(\&Math::Cephes::yn,$safeeval,'&yn');
779: $safehole->wrap(\&Math::Cephes::yv,$safeeval,'&yv');
780: $safehole->wrap(\&Math::Random::random_beta,$safeeval,'&math_random_beta');
781: $safehole->wrap(\&Math::Random::random_chi_square,$safeeval,'&math_random_chi_square');
782: $safehole->wrap(\&Math::Random::random_exponential,$safeeval,'&math_random_exponential');
783: $safehole->wrap(\&Math::Random::random_f,$safeeval,'&math_random_f');
784: $safehole->wrap(\&Math::Random::random_gamma,$safeeval,'&math_random_gamma');
785: $safehole->wrap(\&Math::Random::random_multivariate_normal,$safeeval,'&math_random_multivariate_normal');
786: $safehole->wrap(\&Math::Random::random_multinomial,$safeeval,'&math_random_multinomial');
787: $safehole->wrap(\&Math::Random::random_noncentral_chi_square,$safeeval,'&math_random_noncentral_chi_square');
788: $safehole->wrap(\&Math::Random::random_noncentral_f,$safeeval,'&math_random_noncentral_f');
789: $safehole->wrap(\&Math::Random::random_normal,$safeeval,'&math_random_normal');
790: $safehole->wrap(\&Math::Random::random_permutation,$safeeval,'&math_random_permutation');
791: $safehole->wrap(\&Math::Random::random_permuted_index,$safeeval,'&math_random_permuted_index');
792: $safehole->wrap(\&Math::Random::random_uniform,$safeeval,'&math_random_uniform');
793: $safehole->wrap(\&Math::Random::random_poisson,$safeeval,'&math_random_poisson');
794: $safehole->wrap(\&Math::Random::random_uniform_integer,$safeeval,'&math_random_uniform_integer');
795: $safehole->wrap(\&Math::Random::random_negative_binomial,$safeeval,'&math_random_negative_binomial');
796: $safehole->wrap(\&Math::Random::random_binomial,$safeeval,'&math_random_binomial');
797: $safehole->wrap(\&Math::Random::random_seed_from_phrase,$safeeval,'&random_seed_from_phrase');
798: $safehole->wrap(\&Math::Random::random_set_seed_from_phrase,$safeeval,'&random_set_seed_from_phrase');
799: $safehole->wrap(\&Math::Random::random_get_seed,$safeeval,'&random_get_seed');
800: $safehole->wrap(\&Math::Random::random_set_seed,$safeeval,'&random_set_seed');
801:
802: #need to inspect this class of ops
803: # $safeeval->deny(":base_orig");
804: $safeinit .= ';$external::target="'.$target.'";';
805: my $rndseed;
806: my ($symb,$courseid,$domain,$name) = &Apache::lonxml::whichuser();
807: $rndseed=&Apache::lonnet::rndseed($symb,$courseid,$domain,$name);
808: $safeinit .= ';$external::randomseed='.$rndseed.';';
809: &Apache::run::run($safeinit,$safeeval);
810: }
811:
812: sub startredirection {
813: $Apache::lonxml::redirection++;
814: push (@Apache::lonxml::outputstack, '');
815: }
816:
817: sub endredirection {
818: if (!$Apache::lonxml::redirection) {
819: &Apache::lonxml::error("Endredirection was called, before a startredirection, perhaps you have unbalanced tags. Some debuging information:".join ":",caller);
820: return '';
821: }
822: $Apache::lonxml::redirection--;
823: pop @Apache::lonxml::outputstack;
824: }
825:
826: sub end_tag {
827: my ($tagstack,$parstack,$token)=@_;
828: pop(@$tagstack);
829: pop(@$parstack);
830: &decreasedepth($token);
831: }
832:
833: sub initdepth {
834: @Apache::lonxml::depthcounter=();
835: $Apache::lonxml::depth=-1;
836: $Apache::lonxml::olddepth=-1;
837: }
838:
839: sub increasedepth {
840: my ($token) = @_;
841: $Apache::lonxml::depth++;
842: $Apache::lonxml::depthcounter[$Apache::lonxml::depth]++;
843: if ($Apache::lonxml::depthcounter[$Apache::lonxml::depth]==1) {
844: $Apache::lonxml::olddepth=$Apache::lonxml::depth;
845: }
846: my $curdepth=join('_',@Apache::lonxml::depthcounter);
847: &Apache::lonxml::debug("s $Apache::lonxml::depth : $Apache::lonxml::olddepth : $curdepth : $token->[1]\n");
848: #print "<br />s $Apache::lonxml::depth : $Apache::lonxml::olddepth : $curdepth : $token->[1]\n";
849: }
850:
851: sub decreasedepth {
852: my ($token) = @_;
853: $Apache::lonxml::depth--;
854: if ($Apache::lonxml::depth<$Apache::lonxml::olddepth-1) {
855: $#Apache::lonxml::depthcounter--;
856: $Apache::lonxml::olddepth=$Apache::lonxml::depth+1;
857: }
858: if ( $Apache::lonxml::depth < -1) {
859: &Apache::lonxml::warning("Missing tags, unable to properly run file.");
860: $Apache::lonxml::depth='-1';
861: }
862: my $curdepth=join('_',@Apache::lonxml::depthcounter);
863: &Apache::lonxml::debug("e $Apache::lonxml::depth : $Apache::lonxml::olddepth : $token->[1] : $curdepth\n");
864: #print "<br />e $Apache::lonxml::depth : $Apache::lonxml::olddepth : $token->[1] : $curdepth\n";
865: }
866:
867: sub get_all_text {
868:
869: my($tag,$pars)= @_;
870: my $depth=0;
871: my $token;
872: my $result='';
873: if ( $tag =~ m:^/: ) {
874: my $tag=substr($tag,1);
875: # &Apache::lonxml::debug("have:$tag:");
876: while (($depth >=0) && ($token = $pars->get_token)) {
877: # &Apache::lonxml::debug("e token:$token->[0]:$depth:$token->[1]");
878: if (($token->[0] eq 'T')||($token->[0] eq 'C')||($token->[0] eq 'D')) {
879: $result.=$token->[1];
880: } elsif ($token->[0] eq 'PI') {
881: $result.=$token->[2];
882: } elsif ($token->[0] eq 'S') {
883: if ($token->[1] eq $tag) { $depth++; }
884: $result.=$token->[4];
885: } elsif ($token->[0] eq 'E') {
886: if ( $token->[1] eq $tag) { $depth--; }
887: #skip sending back the last end tag
888: if ($depth > -1) { $result.=$token->[2]; } else {
889: $pars->unget_token($token);
890: }
891: }
892: }
893: } else {
894: while ($token = $pars->get_token) {
895: # &Apache::lonxml::debug("s token:$token->[0]:$depth:$token->[1]");
896: if (($token->[0] eq 'T')||($token->[0] eq 'C')||($token->[0] eq 'D')) {
897: $result.=$token->[1];
898: } elsif ($token->[0] eq 'PI') {
899: $result.=$token->[2];
900: } elsif ($token->[0] eq 'S') {
901: if ( $token->[1] eq $tag) {
902: $pars->unget_token($token); last;
903: } else {
904: $result.=$token->[4];
905: }
906: } elsif ($token->[0] eq 'E') {
907: $result.=$token->[2];
908: }
909: }
910: }
911: # &Apache::lonxml::debug("Exit:$result:");
912: return $result
913: }
914:
915: sub newparser {
916: my ($parser,$contentref,$dir) = @_;
917: push (@$parser,HTML::TokeParser->new($contentref));
918: $$parser['-1']->xml_mode('1');
919: if ( $dir eq '' ) {
920: push (@Apache::lonxml::pwd, $Apache::lonxml::pwd[$#Apache::lonxml::pwd]);
921: } else {
922: push (@Apache::lonxml::pwd, $dir);
923: }
924: # &Apache::lonxml::debug("pwd:$#Apache::lonxml::pwd");
925: # &Apache::lonxml::debug("pwd:$Apache::lonxml::pwd[$#Apache::lonxml::pwd]");
926: }
927:
928: sub parstring {
929: my ($token) = @_;
930: my $temp='';
931: foreach (@{$token->[3]}) {
932: unless ($_=~/\W/) {
933: my $val=$token->[2]->{$_};
934: $val =~ s/([\%\@\\])/\\$1/g;
935: #if ($val =~ m/^[\%\@]/) { $val="\\".$val; }
936: $temp .= "my \$$_=\"$val\";"
937: }
938: }
939: return $temp;
940: }
941:
942: sub writeallows {
943: unless ($#extlinks>=0) { return; }
944: my $thisurl='/res/'.&Apache::lonnet::declutter(shift);
945: if ($ENV{'httpref.'.$thisurl}) {
946: $thisurl=$ENV{'httpref.'.$thisurl};
947: }
948: my $thisdir=$thisurl;
949: $thisdir=~s/\/[^\/]+$//;
950: my %httpref=();
951: foreach (@extlinks) {
952: $httpref{'httpref.'.
953: &Apache::lonnet::hreflocation($thisdir,$_)}=$thisurl;
954: }
955: @extlinks=();
956: &Apache::lonnet::appenv(%httpref);
957: }
958:
959: #
960: # Afterburner handles anchors, highlights and links
961: #
962: sub afterburn {
963: my $result=shift;
964: foreach (split(/&/,$ENV{'QUERY_STRING'})) {
965: my ($name, $value) = split(/=/,$_);
966: $value =~ tr/+/ /;
967: $value =~ s/%([a-fA-F0-9][a-fA-F0-9])/pack("C",hex($1))/eg;
968: if (($name eq 'highlight')||($name eq 'anchor')||($name eq 'link')) {
969: unless ($ENV{'form.'.$name}) {
970: $ENV{'form.'.$name}=$value;
971: }
972: }
973: }
974: if ($ENV{'form.highlight'}) {
975: foreach (split(/\,/,$ENV{'form.highlight'})) {
976: my $anchorname=$_;
977: my $matchthis=$anchorname;
978: $matchthis=~s/\_+/\\s\+/g;
979: $result=~s/($matchthis)/\<font color=\"red\"\>$1\<\/font\>/gs;
980: }
981: }
982: if ($ENV{'form.link'}) {
983: foreach (split(/\,/,$ENV{'form.link'})) {
984: my ($anchorname,$linkurl)=split(/\>/,$_);
985: my $matchthis=$anchorname;
986: $matchthis=~s/\_+/\\s\+/g;
987: $result=~s/($matchthis)/\<a href=\"$linkurl\"\>$1\<\/a\>/gs;
988: }
989: }
990: if ($ENV{'form.anchor'}) {
991: my $anchorname=$ENV{'form.anchor'};
992: my $matchthis=$anchorname;
993: $matchthis=~s/\_+/\\s\+/g;
994: $result=~s/($matchthis)/\<a name=\"$anchorname\"\>$1\<\/a\>/s;
995: $result.=(<<"ENDSCRIPT");
996: <script>
997: document.location.hash='$anchorname';
998: </script>
999: ENDSCRIPT
1000: }
1001: return $result;
1002: }
1003:
1004: sub storefile {
1005: my ($file,$contents)=@_;
1006: if (my $fh=Apache::File->new('>'.$file)) {
1007: print $fh $contents;
1008: $fh->close();
1009: }
1010: }
1011:
1012: sub inserteditinfo {
1013: my ($result,$filecontents)=@_;
1014: unless ($filecontents) {
1015: $filecontents=(<<SIMPLECONTENT);
1016: <html>
1017: <head>
1018: <title>
1019: Title of Document Goes Here
1020: </title>
1021: </head>
1022: <body bgcolor="#FFFFFF">
1023:
1024: Body of Document Goes Here
1025:
1026: </body>
1027: </html>
1028: SIMPLECONTENT
1029: }
1030: my $editheader='<a href="#editsection">Edit below</a><hr />';
1031: my $editfooter=(<<ENDFOOTER);
1032: <hr />
1033: <a name="editsection" />
1034: <form method="post">
1035: <textarea cols="80" rows="40" name="filecont">$filecontents</textarea>
1036: <br />
1037: <input type="submit" name="attemptclean"
1038: value="Save and then attempt to clean HTML" />
1039: <input type="submit" name="savethisfile" value="Save this" />
1040: </form>
1041: ENDFOOTER
1042: $result=~s/(\<body[^\>]*\>)/$1$editheader/is;
1043: $result=~s/(\<\/body\>)/$editfooter/is;
1044: return $result;
1045: }
1046:
1047: sub handler {
1048: my $request=shift;
1049:
1050: my $target='web';
1051:
1052: $Apache::lonxml::debug=0;
1053:
1054: if ($ENV{'browser.mathml'}) {
1055: $request->content_type('text/xml');
1056: } else {
1057: $request->content_type('text/html');
1058: }
1059: &Apache::loncommon::no_cache($request);
1060: $request->send_http_header;
1061:
1062: return OK if $request->header_only;
1063:
1064:
1065: my $file=&Apache::lonnet::filelocation("",$request->uri);
1066: #
1067: # Edit action? Save file.
1068: #
1069: unless ($ENV{'request.state'} eq 'published') {
1070: if (($ENV{'form.savethisfile'}) || ($ENV{'form.attemptclean'})) {
1071: &storefile($file,$ENV{'form.filecont'});
1072: }
1073: }
1074: my %mystyle;
1075: my $result = '';
1076: my $filecontents=&Apache::lonnet::getfile($file);
1077: if ($filecontents == -1) {
1078: $result=(<<ENDNOTFOUND);
1079: <html>
1080: <head>
1081: <title>File not found</title>
1082: </head>
1083: <body bgcolor="#FFFFFF">
1084: <b>File not found: $file</b>
1085: </body>
1086: </html>
1087: ENDNOTFOUND
1088: $filecontents='';
1089: } else {
1090: unless ($ENV{'request.state'} eq 'published') {
1091: if ($ENV{'form.attemptclean'}) {
1092: $filecontents=&htmlclean($filecontents,1);
1093: }
1094: }
1095: $result = &Apache::lonxml::xmlparse($target,$filecontents,'',%mystyle);
1096: }
1097:
1098: #
1099: # Edit action? Insert editing commands
1100: #
1101: unless ($ENV{'request.state'} eq 'published') {
1102: $result=&inserteditinfo($result,$filecontents);
1103: }
1104:
1105: writeallows($request->uri);
1106:
1107: $request->print($result);
1108:
1109: return OK;
1110: }
1111:
1112: sub debug {
1113: if ($Apache::lonxml::debug eq 1) {
1114: print("DEBUG:".$_[0]."<br />\n");
1115: }
1116: }
1117:
1118: sub error {
1119: if (($Apache::lonxml::debug eq 1) || ($ENV{'request.state'} eq 'construct') ) {
1120: print "<b>ERROR:</b>".$_[0]."<br />\n";
1121: } else {
1122: print "<b>An Error occured while processing this resource. The instructor has been notified.</b> <br />";
1123: #notify author
1124: &Apache::lonmsg::author_res_msg($ENV{'request.filename'},$_[0]);
1125: #notify course
1126: if ( $ENV{'request.course.id'} ) {
1127: my $users=$ENV{'course.'.$ENV{'request.course.id'}.'.comment.email'};
1128: my $declutter=&Apache::lonnet::declutter($ENV{'request.filename'});
1129: foreach my $user (split /\,/, $users) {
1130: ($user,my $domain) = split /:/, $user;
1131: &Apache::lonmsg::user_normal_msg($user,$domain,
1132: "Error [$declutter]",$_[0]);
1133: }
1134: }
1135:
1136: #FIXME probably shouldn't have me get everything forever.
1137: &Apache::lonmsg::user_normal_msg('albertel','msu',"Error in $ENV{'request.filename'}",$_[0]);
1138: #&Apache::lonmsg::user_normal_msg('albertel','103',"Error in $ENV{'request.filename'}",$_[0]);
1139: }
1140: }
1141:
1142: sub warning {
1143: if ($ENV{'request.state'} eq 'construct') {
1144: print "<b>W</b>ARNING<b>:</b>".$_[0]."<br />\n";
1145: }
1146: }
1147:
1148: sub get_param {
1149: my ($param,$parstack,$safeeval,$context) = @_;
1150: if ( ! $context ) { $context = -1; }
1151: my $args ='';
1152: if ( $#$parstack > (-2-$context) ) { $args=$$parstack[$context]; }
1153: if ( $args =~ /my \$$param=\"/ ) {
1154: return &Apache::run::run("{$args;".'return $'.$param.'}',$safeeval); #'
1155: } else {
1156: return undef;
1157: }
1158: }
1159:
1160: sub get_param_var {
1161: my ($param,$parstack,$safeeval,$context) = @_;
1162: if ( ! $context ) { $context = -1; }
1163: my $args ='';
1164: if ( $#$parstack > (-2-$context) ) { $args=$$parstack[$context]; }
1165: if ( $args !~ /my \$$param=\"/ ) { return undef; }
1166: my $value=&Apache::run::run("{$args;".'return $'.$param.'}',$safeeval); #'
1167: if ($value =~ /^[\$\@\%]/) {
1168: return &Apache::run::run("return $value",$safeeval,1);
1169: } else {
1170: return $value;
1171: }
1172: }
1173:
1174: sub register_insert {
1175: my @data = split /\n/, &Apache::lonnet::getfile('/home/httpd/lonTabs/insertlist.tab');
1176: my $i;
1177: my $tagnum=0;
1178: my @order;
1179: for ($i=0;$i < $#data; $i++) {
1180: my $line = $data[$i];
1181: if ( $line =~ /^\#/ || $line =~ /^\s*\n/) { next; }
1182: if ( $line =~ /TABLE/ ) { last; }
1183: my ($tag,$descrip,$color,$function,$show) = split(/,/, $line);
1184: if ($tag) {
1185: $insertlist{"$tagnum.tag"} = $tag;
1186: $insertlist{"$tagnum.description"} = $descrip;
1187: $insertlist{"$tagnum.color"} = $color;
1188: $insertlist{"$tagnum.function"} = $function;
1189: if (!defined($show)) { $show='yes'; }
1190: $insertlist{"$tagnum.show"}= $show;
1191: $insertlist{"$tag.num"}=$tagnum;
1192: $tagnum++;
1193: }
1194: }
1195: $i++; #skipping TABLE line
1196: $tagnum = 0;
1197: for (;$i < $#data;$i++) {
1198: my $line = $data[$i];
1199: my ($mnemonic,@which) = split(/ +/,$line);
1200: my $tag = $insertlist{"$tagnum.tag"};
1201: for (my $j=0;$j <=$#which;$j++) {
1202: if ( $which[$j] eq 'Y' ) {
1203: if ($insertlist{"$j.show"} ne 'no') {
1204: push(@{ $insertlist{"$tag.which"} },$j);
1205: }
1206: }
1207: }
1208: $tagnum++;
1209: }
1210: }
1211:
1212: sub description {
1213: my ($token)=@_;
1214: my $tagnum;
1215: my $tag=$token->[1];
1216: foreach my $namespace (reverse @Apache::lonxml::namespace) {
1217: my $testtag=$namespace.'::'.$tag;
1218: $tagnum=$insertlist{"$testtag.num"};
1219: if (defined($tagnum)) { last; }
1220: }
1221: if (!defined ($tagnum)) { $tagnum=$Apache::lonxml::insertlist{"$tag.num"}; }
1222: return $insertlist{$tagnum.'.description'};
1223: }
1224:
1225: # ----------------------------------------------------------------- whichuser
1226: # returns a list of $symb, $courseid, $domain, $name that is correct for
1227: # calls to lonnet functions for this setup.
1228: # - looks for form.grade_ parameters
1229: sub whichuser {
1230: my ($symb,$courseid,$domain,$name);
1231: if (defined($ENV{'form.grade_symb'})) {
1232: my $tmp_courseid=$ENV{'form.grade_courseid'};
1233: my $allowed=&Apache::lonnet::allowed('mgr',$tmp_courseid);
1234: if ($allowed) {
1235: $symb=$ENV{'form.grade_symb'};
1236: $courseid=$ENV{'form.grade_courseid'};
1237: $domain=$ENV{'form.grade_domain'};
1238: $name=$ENV{'form.grade_username'};
1239: }
1240: } else {
1241: $symb=&Apache::lonnet::symbread();
1242: $courseid=$ENV{'request.course.id'};
1243: $domain=$ENV{'user.domain'};
1244: $name=$ENV{'user.name'};
1245: }
1246: return ($symb,$courseid,$domain,$name);
1247: }
1248:
1249: 1;
1250: __END__
1251:
1252:
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