1: # The LearningOnline Network with CAPA
2: # XML Parser Module
3: #
4: # $Id: lonxml.pm,v 1.154 2002/02/26 21:00:38 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: # Dec Guy Albertelli
55: # YEAR=2002
56: # 1/1 Gerd Kortemeyer
57: # 1/2 Matthew Hall
58: # 1/3 Gerd Kortemeyer
59: #
60:
61: package Apache::lonxml;
62: use vars
63: qw(@pwd @outputstack $redirection $import @extlinks $metamode $evaluate %insertlist @namespace);
64: use strict;
65: use HTML::TokeParser;
66: use HTML::TreeBuilder;
67: use Safe;
68: use Safe::Hole;
69: use Math::Cephes qw(:trigs :hypers :bessels erf erfc);
70: use Math::Random qw(:all);
71: use Opcode;
72:
73: sub register {
74: my ($space,@taglist) = @_;
75: foreach my $temptag (@taglist) {
76: push(@{ $Apache::lonxml::alltags{$temptag} },$space);
77: }
78: }
79:
80: sub deregister {
81: my ($space,@taglist) = @_;
82: foreach my $temptag (@taglist) {
83: my $tempspace = $Apache::lonxml::alltags{$temptag}[-1];
84: if ($tempspace eq $space) {
85: pop(@{ $Apache::lonxml::alltags{$temptag} });
86: }
87: }
88: #&printalltags();
89: }
90:
91: use Apache::Constants qw(:common);
92: use Apache::lontexconvert;
93: use Apache::style;
94: use Apache::run;
95: use Apache::londefdef;
96: use Apache::scripttag;
97: use Apache::edit;
98: use Apache::lonnet;
99: use Apache::File;
100: use Apache::loncommon;
101:
102: #================================================== Main subroutine: xmlparse
103: #debugging control, to turn on debugging modify the correct handler
104: $Apache::lonxml::debug=0;
105:
106: #path to the directory containing the file currently being processed
107: @pwd=();
108:
109: #these two are used for capturing a subset of the output for later processing,
110: #don't touch them directly use &startredirection and &endredirection
111: @outputstack = ();
112: $redirection = 0;
113:
114: #controls wheter the <import> tag actually does
115: $import = 1;
116: @extlinks=();
117:
118: # meta mode is a bit weird only some output is to be turned off
119: #<output> tag turns metamode off (defined in londefdef.pm)
120: $metamode = 0;
121:
122: # turns on and of run::evaluate actually derefencing var refs
123: $evaluate = 1;
124:
125: # data structure for eidt mode, determines what tags can go into what other tags
126: %insertlist=();
127:
128: # stores the list of active tag namespaces
129: @namespace=();
130:
131: # has the dynamic menu been updated to know about this resource
132: $Apache::lonxml::registered=0;
133:
134: sub xmlbegin {
135: my $output='';
136: if ($ENV{'browser.mathml'}) {
137: $output='<?xml version="1.0"?>'
138: .'<?xml-stylesheet type="text/css" href="/adm/MathML/mathml.css"?>'
139: .'<!DOCTYPE html SYSTEM "/adm/MathML/mathml.dtd" '
140: .'[<!ENTITY mathns "http://www.w3.org/1998/Math/MathML">]>'
141: .'<html xmlns:math="http://www.w3.org/1998/Math/MathML" '
142: .'xmlns="http://www.w3.org/TR/REC-html40">';
143: } else {
144: $output='<html>';
145: }
146: return $output;
147: }
148:
149: sub xmlend {
150: my $discussion='';
151: if ($ENV{'request.course.id'}) {
152: my $crs='/'.$ENV{'request.course.id'};
153: if ($ENV{'request.course.sec'}) {
154: $crs.='_'.$ENV{'request.course.sec'};
155: }
156: $crs=~s/\_/\//g;
157: my $seeid=&Apache::lonnet::allowed('rin',$crs);
158: my $symb=&Apache::lonnet::symbread();
159: if ($symb) {
160: my %contrib=&Apache::lonnet::restore($symb,$ENV{'request.course.id'},
161: $ENV{'course.'.$ENV{'request.course.id'}.'.domain'},
162: $ENV{'course.'.$ENV{'request.course.id'}.'.num'});
163: if ($contrib{'version'}) {
164: $discussion.=
165: '<address><hr /><h2>Course Discussion of Resource</h2>';
166: my $idx;
167: for ($idx=1;$idx<=$contrib{'version'};$idx++) {
168: my $hidden=($contrib{'hidden'}=~/\.$idx\./);
169: unless (($hidden) && (!$seeid)) {
170: my $message=$contrib{$idx.':message'};
171: $message=~s/\n/\<br \/\>/g;
172: if ($message) {
173: if ($hidden) {
174: $message='<font color="#888888">'.$message.'</font>';
175: }
176: my $sender='Anonymous';
177: if ((!$contrib{$idx.':anonymous'}) || ($seeid)) {
178: $sender=$contrib{$idx.':sendername'}.' at '.
179: $contrib{$idx.':senderdomain'};
180: if ($contrib{$idx.':anonymous'}) {
181: $sender.=' (anonymous)';
182: }
183: if ($seeid) {
184: if ($hidden) {
185: $sender.=' <a href="/adm/feedback?unhide='.
186: $symb.':::'.$idx.'">Make Visible</a>';
187: } else {
188: $sender.=' <a href="/adm/feedback?hide='.
189: $symb.':::'.$idx.'">Hide</a>';
190: }
191: }
192: }
193: $discussion.='<p><b>'.$sender.'</b> ('.
194: localtime($contrib{$idx.':timestamp'}).
195: '):<blockquote>'.$message.
196: '</blockquote></p>';
197: }
198: }
199: }
200: $discussion.='</address>';
201: }
202: }
203: }
204: return $discussion.'</html>';
205: }
206:
207: sub tokeninputfield {
208: my $defhost=$Apache::lonnet::perlvar{'lonHostID'};
209: $defhost=~tr/a-z/A-Z/;
210: return (<<ENDINPUTFIELD)
211: <script>
212: function updatetoken() {
213: var comp=new Array;
214: var barcode=unescape(document.tokeninput.barcode.value);
215: comp=barcode.split('*');
216: if (typeof(comp[0])!="undefined") {
217: document.tokeninput.codeone.value=comp[0];
218: }
219: if (typeof(comp[1])!="undefined") {
220: document.tokeninput.codetwo.value=comp[1];
221: }
222: if (typeof(comp[2])!="undefined") {
223: comp[2]=comp[2].toUpperCase();
224: document.tokeninput.codethree.value=comp[2];
225: }
226: document.tokeninput.barcode.value='';
227: }
228: </script>
229: <form method="post" name="tokeninput">
230: <table border="2" bgcolor="#FFFFBB">
231: <tr><th>DocID Checkin</th></tr>
232: <tr><td>
233: <table>
234: <tr>
235: <td>Scan in Barcode</td>
236: <td><input type="text" size="22" name="barcode"
237: onChange="updatetoken()"/></td>
238: </tr>
239: <tr><td><i>or</i> Type in DocID</td>
240: <td>
241: <input type="text" size="5" name="codeone" />
242: <b><font size="+2">*</font></b>
243: <input type="text" size="5" name="codetwo" />
244: <b><font size="+2">*</font></b>
245: <input type="text" size="10" name="codethree" value="$defhost"
246: onChange="this.value=this.value.toUpperCase()" />
247: </td></tr>
248: </table>
249: </td></tr>
250: <tr><td><input type="submit" value="Check in DocID" /></td></tr>
251: </table>
252: </form>
253: ENDINPUTFIELD
254: }
255:
256: sub maketoken {
257: my ($symb,$tuname,$tudom,$tcrsid)=@_;
258: unless ($symb) {
259: $symb=&Apache::lonnet::symbread();
260: }
261: unless ($tuname) {
262: $tuname=$ENV{'user.name'};
263: $tudom=$ENV{'user.domain'};
264: $tcrsid=$ENV{'request.course.id'};
265: }
266:
267: return &Apache::lonnet::checkout($symb,$tuname,$tudom,$tcrsid);
268: }
269:
270: sub printtokenheader {
271: my ($target,$token,$tsymb,$tcrsid,$tudom,$tuname)=@_;
272: unless ($token) { return ''; }
273:
274: my ($symb,$courseid,$domain,$name) = &Apache::lonxml::whichuser();
275: unless ($tsymb) {
276: $tsymb=$symb;
277: }
278: unless ($tuname) {
279: $tuname=$name;
280: $tudom=$domain;
281: $tcrsid=$courseid;
282: }
283:
284: my %reply=&Apache::lonnet::get('environment',
285: ['firstname','middlename','lastname','generation'],
286: $tudom,$tuname);
287: my $plainname=$reply{'firstname'}.' '.
288: $reply{'middlename'}.' '.
289: $reply{'lastname'}.' '.
290: $reply{'generation'};
291:
292: if ($target eq 'web') {
293: my %idhash=&Apache::lonnet::idrget($tudom,($tuname));
294: return
295: '<img align="right" src="/cgi-bin/barcode.gif?encode='.$token.'" />'.
296: 'Checked out for '.$plainname.
297: '<br />User: '.$tuname.' at '.$tudom.
298: '<br />ID: '.$idhash{$tuname}.
299: '<br />CourseID: '.$tcrsid.
300: '<br />Course: '.$ENV{'course.'.$tcrsid.'.description'}.
301: '<br />DocID: '.$token.
302: '<br />Time: '.localtime().'<hr />';
303: } else {
304: return $token;
305: }
306: }
307:
308: sub fontsettings() {
309: my $headerstring='';
310: if (($ENV{'browser.os'} eq 'mac') && (!$ENV{'browser.mathml'})) {
311: $headerstring.=
312: '<meta Content-Type="text/html; charset=x-mac-roman">';
313: }
314: return $headerstring;
315: }
316:
317: sub registerurl {
318: my $forcereg=shift;
319: if ($ENV{'request.publicaccess'}) {
320: return
321: '<script>function LONCAPAreg(){} function LONCAPAstale(){}</script>';
322: }
323: if ($Apache::lonxml::registered && !$forcereg) { return ''; }
324: $Apache::lonxml::registered=1;
325: if (($ENV{'REQUEST_URI'}!~/^\/(res\/)*adm\//) || ($forcereg)) {
326: my $hwkadd='';
327: if ($ENV{'REQUEST_URI'}=~/\.(problem|exam|quiz|assess|survey|form)$/) {
328: if (&Apache::lonnet::allowed('vgr',$ENV{'request.course.id'})) {
329: $hwkadd.=(<<ENDSUBM);
330: menu.switchbutton
331: (7,1,'subm.gif','view sub','missions',
332: 'gocmd("/adm/grades","submission")');
333: ENDSUBM
334: }
335: if (&Apache::lonnet::allowed('mgr',$ENV{'request.course.id'})) {
336: $hwkadd.=(<<ENDGRDS);
337: menu.switchbutton
338: (7,2,'pgrd.gif','problem','grades',
339: 'gocmd("/adm/grades","viewgrades")');
340: ENDGRDS
341: }
342: if (&Apache::lonnet::allowed('opa',$ENV{'request.course.id'})) {
343: $hwkadd.=(<<ENDPARM);
344: menu.switchbutton
345: (7,3,'pparm.gif','problem','parms',
346: 'gocmd("/adm/parmset","set")');
347: ENDPARM
348: }
349: }
350: return (<<ENDREGTHIS);
351:
352: <script language="JavaScript">
353: // BEGIN LON-CAPA Internal
354:
355: function LONCAPAreg() {
356: menu=window.open("","LONCAPAmenu");
357: menu.clearTimeout(menu.menucltim);
358: menu.currentURL=window.location.pathname;
359: menu.currentStale=0;
360: menu.clearbut(3,1);
361: menu.switchbutton
362: (6,3,'catalog.gif','catalog','info','catalog_info()');
363: menu.switchbutton
364: (8,1,'eval.gif','evaluate','this','gopost("/adm/evaluate",currentURL)');
365: menu.switchbutton
366: (8,2,'fdbk.gif','feedback','on this','gopost("/adm/feedback",currentURL)');
367: menu.switchbutton
368: (8,3,'prt.gif','prepare','printout','gopost("/adm/printout",currentURL)');
369: menu.switchbutton
370: (2,1,'back.gif','backward','','gopost("/adm/flip","back:"+currentURL)');
371: menu.switchbutton
372: (2,3,'forw.gif','forward','','gopost("/adm/flip","forward:"+currentURL)');
373: menu.switchbutton
374: (9,1,'sbkm.gif','set','bookmark','set_bookmark()');
375: menu.switchbutton
376: (9,2,'vbkm.gif','view','bookmark','edit_bookmarks()');
377: menu.switchbutton
378: (9,3,'anot.gif','anno-','tations','annotate()');
379: $hwkadd
380: }
381:
382: function LONCAPAstale() {
383: menu=window.open("","LONCAPAmenu");
384: menu.currentStale=1;
385: menu.switchbutton
386: (3,1,'reload.gif','return','location','go(currentURL)');
387: menu.clearbut(7,1);
388: menu.clearbut(7,2);
389: menu.clearbut(7,3);
390: menu.menucltim=menu.setTimeout(
391: 'clearbut(2,1);clearbut(2,3);clearbut(8,1);clearbut(8,2);clearbut(8,3);'+
392: 'clearbut(9,1);clearbut(9,2);clearbut(9,3);clearbut(6,3)',
393: 2000);
394:
395: }
396:
397: // END LON-CAPA Internal
398: </script>
399: ENDREGTHIS
400:
401: } else {
402: return (<<ENDDONOTREGTHIS);
403:
404: <script language="JavaScript">
405: // BEGIN LON-CAPA Internal
406:
407: function LONCAPAreg() {
408: menu=window.open("","LONCAPAmenu");
409: menu.currentStale=1;
410: menu.clearbut(2,1);
411: menu.clearbut(2,3);
412: menu.clearbut(8,1);
413: menu.clearbut(8,2);
414: menu.clearbut(8,3);
415: if (menu.currentURL) {
416: menu.switchbutton
417: (3,1,'reload.gif','return','location','go(currentURL)');
418: } else {
419: menu.clearbut(3,1);
420: }
421: }
422:
423: function LONCAPAstale() {
424: }
425:
426: // END LON-CAPA Internal
427: </script>
428: ENDDONOTREGTHIS
429:
430: }
431: }
432:
433: sub loadevents() {
434: return 'LONCAPAreg();';
435: }
436:
437: sub unloadevents() {
438: return 'LONCAPAstale();';
439: }
440:
441: sub printalltags {
442: my $temp;
443: foreach $temp (sort keys %Apache::lonxml::alltags) {
444: &Apache::lonxml::debug("$temp -- ".
445: join(',',@{ $Apache::lonxml::alltags{$temp} }));
446: }
447: }
448:
449: sub xmlparse {
450: my ($target,$content_file_string,$safeinit,%style_for_target) = @_;
451:
452: &setup_globals($target);
453: #&printalltags();
454: my @pars = ();
455: my $pwd=$ENV{'request.filename'};
456: $pwd =~ s:/[^/]*$::;
457: &newparser(\@pars,\$content_file_string,$pwd);
458:
459: my $safeeval = new Safe;
460: my $safehole = new Safe::Hole;
461: &init_safespace($target,$safeeval,$safehole,$safeinit);
462: #-------------------- Redefinition of the target in the case of compound target
463:
464: ($target, my @tenta) = split('&&',$target);
465:
466: my @stack = ();
467: my @parstack = ();
468: &initdepth;
469:
470: my $finaloutput = &inner_xmlparse($target,\@stack,\@parstack,\@pars,
471: $safeeval,\%style_for_target);
472: if ($ENV{'request.uri'}) {
473: &writeallows($ENV{'request.uri'});
474: }
475: return $finaloutput;
476: }
477:
478: sub htmlclean {
479: my ($raw,$full)=@_;
480:
481: my $tree = HTML::TreeBuilder->new;
482: $tree->ignore_unknown(0);
483:
484: $tree->parse($raw);
485:
486: my $output= $tree->as_HTML(undef,' ');
487:
488: $output=~s/\<(br|hr|img|meta|allow)([^\>\/]*)\>/\<$1$2 \/\>/gis;
489: $output=~s/\<\/(br|hr|img|meta|allow)\>//gis;
490: unless ($full) {
491: $output=~s/\<[\/]*(body|head|html)\>//gis;
492: }
493:
494: $tree = $tree->delete;
495:
496: return $output;
497: }
498:
499: sub inner_xmlparse {
500: my ($target,$stack,$parstack,$pars,$safeeval,$style_for_target)=@_;
501: my $finaloutput = '';
502: my $result;
503: my $token;
504: while ( $#$pars > -1 ) {
505: while ($token = $$pars['-1']->get_token) {
506: if (($token->[0] eq 'T') || ($token->[0] eq 'C') || ($token->[0] eq 'D') ) {
507: if ($metamode<1) {
508: $result=$token->[1];
509: }
510: } elsif ($token->[0] eq 'PI') {
511: if ($metamode<1) {
512: $result=$token->[2];
513: }
514: } elsif ($token->[0] eq 'S') {
515: # add tag to stack
516: push (@$stack,$token->[1]);
517: # add parameters list to another stack
518: push (@$parstack,&parstring($token));
519: &increasedepth($token);
520: if (exists $$style_for_target{$token->[1]}) {
521: if ($Apache::lonxml::redirection) {
522: $Apache::lonxml::outputstack['-1'] .=
523: &recurse($$style_for_target{$token->[1]},$target,$safeeval,
524: $style_for_target,@$parstack);
525: } else {
526: $finaloutput .= &recurse($$style_for_target{$token->[1]},$target,
527: $safeeval,$style_for_target,@$parstack);
528: }
529: } else {
530: $result = &callsub("start_$token->[1]", $target, $token, $stack,
531: $parstack, $pars, $safeeval, $style_for_target);
532: }
533: } elsif ($token->[0] eq 'E') {
534: #clear out any tags that didn't end
535: while ($token->[1] ne $$stack['-1'] && ($#$stack > -1)) {
536: my $lasttag=$$stack[-1];
537: if ($token->[1] =~ /^$lasttag$/i) {
538: &Apache::lonxml::warning('Using tag </'.$token->[1].'> as end tag to <'.$$stack[-1].'>');
539: last;
540: } else {
541: &Apache::lonxml::warning('Found tag </'.$token->[1].'> when looking for </'.$$stack[-1].'> in file');
542: &end_tag($stack,$parstack,$token);
543: }
544: }
545:
546: if (exists($$style_for_target{'/'."$token->[1]"})) {
547: if ($Apache::lonxml::redirection) {
548: $Apache::lonxml::outputstack['-1'] .=
549: &recurse($$style_for_target{'/'."$token->[1]"},
550: $target,$safeeval,$style_for_target,@$parstack);
551: } else {
552: $finaloutput .= &recurse($$style_for_target{'/'."$token->[1]"},
553: $target,$safeeval,$style_for_target,
554: @$parstack);
555: }
556: } else {
557: $result = &callsub("end_$token->[1]", $target, $token, $stack,
558: $parstack, $pars,$safeeval, $style_for_target);
559: }
560: } else {
561: &Apache::lonxml::error("Unknown token event :$token->[0]:$token->[1]:");
562: }
563: #evaluate variable refs in result
564: if ($result ne "") {
565: if ( $#$parstack > -1 ) {
566: if ($Apache::lonxml::redirection) {
567: $Apache::lonxml::outputstack['-1'] .=
568: &Apache::run::evaluate($result,$safeeval,$$parstack['-1']);
569: } else {
570: $finaloutput .= &Apache::run::evaluate($result,$safeeval,
571: $$parstack['-1']);
572: }
573: } else {
574: $finaloutput .= &Apache::run::evaluate($result,$safeeval,'');
575: }
576: $result = '';
577: }
578: if ($token->[0] eq 'E') {
579: &end_tag($stack,$parstack,$token);
580: }
581: }
582: pop @$pars;
583: pop @Apache::lonxml::pwd;
584: }
585:
586: # if ($target eq 'meta') {
587: # $finaloutput.=&endredirection;
588: # }
589:
590: if (($ENV{'QUERY_STRING'}) && ($target eq 'web')) {
591: $finaloutput=&afterburn($finaloutput);
592: }
593: return $finaloutput;
594: }
595:
596: sub recurse {
597: my @innerstack = ();
598: my @innerparstack = ();
599: my ($newarg,$target,$safeeval,$style_for_target,@parstack) = @_;
600: my @pat = ();
601: &newparser(\@pat,\$newarg);
602: my $tokenpat;
603: my $partstring = '';
604: my $output='';
605: my $decls='';
606: &Apache::lonxml::debug("Recursing");
607: while ( $#pat > -1 ) {
608: while ($tokenpat = $pat[$#pat]->get_token) {
609: if (($tokenpat->[0] eq 'T') || ($tokenpat->[0] eq 'C') || ($tokenpat->[0] eq 'D') ) {
610: if ($metamode<1) { $partstring=$tokenpat->[1]; }
611: } elsif ($tokenpat->[0] eq 'PI') {
612: if ($metamode<1) { $partstring=$tokenpat->[2]; }
613: } elsif ($tokenpat->[0] eq 'S') {
614: push (@innerstack,$tokenpat->[1]);
615: push (@innerparstack,&parstring($tokenpat));
616: &increasedepth($tokenpat);
617: $partstring = &callsub("start_$tokenpat->[1]", $target, $tokenpat,
618: \@innerstack, \@innerparstack, \@pat,
619: $safeeval, $style_for_target);
620: } elsif ($tokenpat->[0] eq 'E') {
621: #clear out any tags that didn't end
622: while ($tokenpat->[1] ne $innerstack[$#innerstack]
623: && ($#innerstack > -1)) {
624: my $lasttag=$innerstack[-1];
625: if ($tokenpat->[1] =~ /^$lasttag$/i) {
626: &Apache::lonxml::warning('Using tag </'.$tokenpat->[1].'> as end tag to <'.$innerstack[-1].'>');
627: last;
628: } else {
629: &Apache::lonxml::warning('Found tag </'.$tokenpat->[1].'> when looking for </'.$innerstack[-1].'> in file');
630: &end_tag(\@innerstack,\@innerparstack,$tokenpat);
631: }
632: }
633: $partstring = &callsub("end_$tokenpat->[1]", $target, $tokenpat,
634: \@innerstack, \@innerparstack, \@pat,
635: $safeeval, $style_for_target);
636: } else {
637: &Apache::lonxml::error("Unknown token event :$tokenpat->[0]:$tokenpat->[1]:");
638: }
639: #pass both the variable to the style tag, and the tag we
640: #are processing inside the <definedtag>
641: if ( $partstring ne "" ) {
642: if ( $#parstack > -1 ) {
643: if ( $#innerparstack > -1 ) {
644: $decls= $parstack[$#parstack].$innerparstack[$#innerparstack];
645: } else {
646: $decls= $parstack[$#parstack];
647: }
648: } else {
649: if ( $#innerparstack > -1 ) {
650: $decls=$innerparstack[$#innerparstack];
651: } else {
652: $decls='';
653: }
654: }
655: $output .= &Apache::run::evaluate($partstring,$safeeval,$decls);
656: $partstring = '';
657: }
658: if ($tokenpat->[0] eq 'E') { pop @innerstack;pop @innerparstack;
659: &decreasedepth($tokenpat);}
660: }
661: pop @pat;
662: pop @Apache::lonxml::pwd;
663: }
664: &Apache::lonxml::debug("Exiting Recursing");
665: return $output;
666: }
667:
668: sub callsub {
669: my ($sub,$target,$token,$tagstack,$parstack,$parser,$safeeval,$style)=@_;
670: my $currentstring='';
671: my $nodefault;
672: {
673: my $sub1;
674: no strict 'refs';
675: my $tag=$token->[1];
676: my $space=$Apache::lonxml::alltags{$tag}[-1];
677: if (!$space) {
678: $tag=~tr/A-Z/a-z/;
679: $sub=~tr/A-Z/a-z/;
680: $space=$Apache::lonxml::alltags{$tag}[-1]
681: }
682:
683: my $deleted=0;
684: $Apache::lonxml::curdepth=join('_',@Apache::lonxml::depthcounter);
685: if (($token->[0] eq 'S') && ($target eq 'modified')) {
686: $deleted=&Apache::edit::handle_delete($space,$target,$token,$tagstack,
687: $parstack,$parser,$safeeval,
688: $style);
689: }
690: if (!$deleted) {
691: if ($space) {
692: #&Apache::lonxml::debug("Calling sub $sub in $space $metamode");
693: $sub1="$space\:\:$sub";
694: ($currentstring,$nodefault) = &$sub1($target,$token,$tagstack,
695: $parstack,$parser,$safeeval,
696: $style);
697: } else {
698: #&Apache::lonxml::debug("NOT Calling sub $sub in $space $metamode");
699: if ($metamode <1) {
700: if (defined($token->[4]) && ($metamode < 1)) {
701: $currentstring = $token->[4];
702: } else {
703: $currentstring = $token->[2];
704: }
705: }
706: }
707: # &Apache::lonxml::debug("nodefalt:$nodefault:");
708: if ($currentstring eq '' && $nodefault eq '') {
709: if ($target eq 'edit') {
710: &Apache::lonxml::debug("doing default edit for $token->[1]");
711: if ($token->[0] eq 'S') {
712: $currentstring = &Apache::edit::tag_start($target,$token);
713: } elsif ($token->[0] eq 'E') {
714: $currentstring = &Apache::edit::tag_end($target,$token);
715: }
716: } elsif ($target eq 'modified') {
717: if ($token->[0] eq 'S') {
718: $currentstring = $token->[4];
719: $currentstring.=&Apache::edit::handle_insert();
720: } else {
721: $currentstring = $token->[2];
722: }
723: }
724: }
725: }
726: use strict 'refs';
727: }
728: return $currentstring;
729: }
730:
731: sub setup_globals {
732: my ($target)=@_;
733: $Apache::lonxml::registered = 0;
734: @Apache::lonxml::pwd=();
735: @Apache::lonxml::extlinks=();
736: if ($target eq 'meta') {
737: $Apache::lonxml::redirection = 0;
738: $Apache::lonxml::metamode = 1;
739: $Apache::lonxml::evaluate = 1;
740: $Apache::lonxml::import = 0;
741: } elsif ($target eq 'answer') {
742: $Apache::lonxml::redirection = 0;
743: $Apache::lonxml::metamode = 1;
744: $Apache::lonxml::evaluate = 1;
745: $Apache::lonxml::import = 1;
746: } elsif ($target eq 'grade') {
747: &startredirection;
748: $Apache::lonxml::metamode = 0;
749: $Apache::lonxml::evaluate = 1;
750: $Apache::lonxml::import = 1;
751: } elsif ($target eq 'modified') {
752: $Apache::lonxml::redirection = 0;
753: $Apache::lonxml::metamode = 0;
754: $Apache::lonxml::evaluate = 0;
755: $Apache::lonxml::import = 0;
756: } elsif ($target eq 'edit') {
757: $Apache::lonxml::redirection = 0;
758: $Apache::lonxml::metamode = 0;
759: $Apache::lonxml::evaluate = 0;
760: $Apache::lonxml::import = 0;
761: } else {
762: $Apache::lonxml::redirection = 0;
763: $Apache::lonxml::metamode = 0;
764: $Apache::lonxml::evaluate = 1;
765: $Apache::lonxml::import = 1;
766: }
767: }
768:
769: sub init_safespace {
770: my ($target,$safeeval,$safehole,$safeinit) = @_;
771: $safeeval->permit("entereval");
772: $safeeval->permit(":base_math");
773: $safeeval->permit("sort");
774: $safeeval->deny(":base_io");
775: $safehole->wrap(\&Apache::scripttag::xmlparse,$safeeval,'&xmlparse');
776: $safehole->wrap(\&Apache::lonnet::EXT,$safeeval,'&EXT');
777:
778: $safehole->wrap(\&Math::Cephes::asin,$safeeval,'&asin');
779: $safehole->wrap(\&Math::Cephes::acos,$safeeval,'&acos');
780: $safehole->wrap(\&Math::Cephes::atan,$safeeval,'&atan');
781: $safehole->wrap(\&Math::Cephes::sinh,$safeeval,'&sinh');
782: $safehole->wrap(\&Math::Cephes::cosh,$safeeval,'&cosh');
783: $safehole->wrap(\&Math::Cephes::tanh,$safeeval,'&tanh');
784: $safehole->wrap(\&Math::Cephes::asinh,$safeeval,'&asinh');
785: $safehole->wrap(\&Math::Cephes::acosh,$safeeval,'&acosh');
786: $safehole->wrap(\&Math::Cephes::atanh,$safeeval,'&atanh');
787: $safehole->wrap(\&Math::Cephes::erf,$safeeval,'&erf');
788: $safehole->wrap(\&Math::Cephes::erfc,$safeeval,'&erfc');
789: $safehole->wrap(\&Math::Cephes::j0,$safeeval,'&j0');
790: $safehole->wrap(\&Math::Cephes::j1,$safeeval,'&j1');
791: $safehole->wrap(\&Math::Cephes::jn,$safeeval,'&jn');
792: $safehole->wrap(\&Math::Cephes::jv,$safeeval,'&jv');
793: $safehole->wrap(\&Math::Cephes::y0,$safeeval,'&y0');
794: $safehole->wrap(\&Math::Cephes::y1,$safeeval,'&y1');
795: $safehole->wrap(\&Math::Cephes::yn,$safeeval,'&yn');
796: $safehole->wrap(\&Math::Cephes::yv,$safeeval,'&yv');
797: $safehole->wrap(\&Math::Random::random_beta,$safeeval,'&math_random_beta');
798: $safehole->wrap(\&Math::Random::random_chi_square,$safeeval,'&math_random_chi_square');
799: $safehole->wrap(\&Math::Random::random_exponential,$safeeval,'&math_random_exponential');
800: $safehole->wrap(\&Math::Random::random_f,$safeeval,'&math_random_f');
801: $safehole->wrap(\&Math::Random::random_gamma,$safeeval,'&math_random_gamma');
802: $safehole->wrap(\&Math::Random::random_multivariate_normal,$safeeval,'&math_random_multivariate_normal');
803: $safehole->wrap(\&Math::Random::random_multinomial,$safeeval,'&math_random_multinomial');
804: $safehole->wrap(\&Math::Random::random_noncentral_chi_square,$safeeval,'&math_random_noncentral_chi_square');
805: $safehole->wrap(\&Math::Random::random_noncentral_f,$safeeval,'&math_random_noncentral_f');
806: $safehole->wrap(\&Math::Random::random_normal,$safeeval,'&math_random_normal');
807: $safehole->wrap(\&Math::Random::random_permutation,$safeeval,'&math_random_permutation');
808: $safehole->wrap(\&Math::Random::random_permuted_index,$safeeval,'&math_random_permuted_index');
809: $safehole->wrap(\&Math::Random::random_uniform,$safeeval,'&math_random_uniform');
810: $safehole->wrap(\&Math::Random::random_poisson,$safeeval,'&math_random_poisson');
811: $safehole->wrap(\&Math::Random::random_uniform_integer,$safeeval,'&math_random_uniform_integer');
812: $safehole->wrap(\&Math::Random::random_negative_binomial,$safeeval,'&math_random_negative_binomial');
813: $safehole->wrap(\&Math::Random::random_binomial,$safeeval,'&math_random_binomial');
814: $safehole->wrap(\&Math::Random::random_seed_from_phrase,$safeeval,'&random_seed_from_phrase');
815: $safehole->wrap(\&Math::Random::random_set_seed_from_phrase,$safeeval,'&random_set_seed_from_phrase');
816: $safehole->wrap(\&Math::Random::random_get_seed,$safeeval,'&random_get_seed');
817: $safehole->wrap(\&Math::Random::random_set_seed,$safeeval,'&random_set_seed');
818:
819: #need to inspect this class of ops
820: # $safeeval->deny(":base_orig");
821: $safeinit .= ';$external::target="'.$target.'";';
822: my $rndseed;
823: my ($symb,$courseid,$domain,$name) = &Apache::lonxml::whichuser();
824: $rndseed=&Apache::lonnet::rndseed($symb,$courseid,$domain,$name);
825: $safeinit .= ';$external::randomseed='.$rndseed.';';
826: &Apache::run::run($safeinit,$safeeval);
827: }
828:
829: sub startredirection {
830: $Apache::lonxml::redirection++;
831: push (@Apache::lonxml::outputstack, '');
832: }
833:
834: sub endredirection {
835: if (!$Apache::lonxml::redirection) {
836: &Apache::lonxml::error("Endredirection was called, before a startredirection, perhaps you have unbalanced tags. Some debuging information:".join ":",caller);
837: return '';
838: }
839: $Apache::lonxml::redirection--;
840: pop @Apache::lonxml::outputstack;
841: }
842:
843: sub end_tag {
844: my ($tagstack,$parstack,$token)=@_;
845: pop(@$tagstack);
846: pop(@$parstack);
847: &decreasedepth($token);
848: }
849:
850: sub initdepth {
851: @Apache::lonxml::depthcounter=();
852: $Apache::lonxml::depth=-1;
853: $Apache::lonxml::olddepth=-1;
854: }
855:
856: sub increasedepth {
857: my ($token) = @_;
858: $Apache::lonxml::depth++;
859: $Apache::lonxml::depthcounter[$Apache::lonxml::depth]++;
860: if ($Apache::lonxml::depthcounter[$Apache::lonxml::depth]==1) {
861: $Apache::lonxml::olddepth=$Apache::lonxml::depth;
862: }
863: my $curdepth=join('_',@Apache::lonxml::depthcounter);
864: &Apache::lonxml::debug("s $Apache::lonxml::depth : $Apache::lonxml::olddepth : $curdepth : $token->[1]\n");
865: #print "<br />s $Apache::lonxml::depth : $Apache::lonxml::olddepth : $curdepth : $token->[1]\n";
866: }
867:
868: sub decreasedepth {
869: my ($token) = @_;
870: $Apache::lonxml::depth--;
871: if ($Apache::lonxml::depth<$Apache::lonxml::olddepth-1) {
872: $#Apache::lonxml::depthcounter--;
873: $Apache::lonxml::olddepth=$Apache::lonxml::depth+1;
874: }
875: if ( $Apache::lonxml::depth < -1) {
876: &Apache::lonxml::warning("Missing tags, unable to properly run file.");
877: $Apache::lonxml::depth='-1';
878: }
879: my $curdepth=join('_',@Apache::lonxml::depthcounter);
880: &Apache::lonxml::debug("e $Apache::lonxml::depth : $Apache::lonxml::olddepth : $token->[1] : $curdepth\n");
881: #print "<br />e $Apache::lonxml::depth : $Apache::lonxml::olddepth : $token->[1] : $curdepth\n";
882: }
883:
884: sub get_all_text {
885:
886: my($tag,$pars)= @_;
887: my $depth=0;
888: my $token;
889: my $result='';
890: if ( $tag =~ m:^/: ) {
891: my $tag=substr($tag,1);
892: # &Apache::lonxml::debug("have:$tag:");
893: while (($depth >=0) && ($token = $pars->get_token)) {
894: # &Apache::lonxml::debug("e token:$token->[0]:$depth:$token->[1]");
895: if (($token->[0] eq 'T')||($token->[0] eq 'C')||($token->[0] eq 'D')) {
896: $result.=$token->[1];
897: } elsif ($token->[0] eq 'PI') {
898: $result.=$token->[2];
899: } elsif ($token->[0] eq 'S') {
900: if ($token->[1] =~ /^$tag$/i) { $depth++; }
901: $result.=$token->[4];
902: } elsif ($token->[0] eq 'E') {
903: if ( $token->[1] =~ /^$tag$/i) { $depth--; }
904: #skip sending back the last end tag
905: if ($depth > -1) { $result.=$token->[2]; } else {
906: $pars->unget_token($token);
907: }
908: }
909: }
910: } else {
911: while ($token = $pars->get_token) {
912: # &Apache::lonxml::debug("s token:$token->[0]:$depth:$token->[1]");
913: if (($token->[0] eq 'T')||($token->[0] eq 'C')||($token->[0] eq 'D')) {
914: $result.=$token->[1];
915: } elsif ($token->[0] eq 'PI') {
916: $result.=$token->[2];
917: } elsif ($token->[0] eq 'S') {
918: if ( $token->[1] =~ /^$tag$/i) {
919: $pars->unget_token($token); last;
920: } else {
921: $result.=$token->[4];
922: }
923: } elsif ($token->[0] eq 'E') {
924: $result.=$token->[2];
925: }
926: }
927: }
928: # &Apache::lonxml::debug("Exit:$result:");
929: return $result
930: }
931:
932: sub newparser {
933: my ($parser,$contentref,$dir) = @_;
934: push (@$parser,HTML::TokeParser->new($contentref));
935: $$parser['-1']->xml_mode('1');
936: if ( $dir eq '' ) {
937: push (@Apache::lonxml::pwd, $Apache::lonxml::pwd[$#Apache::lonxml::pwd]);
938: } else {
939: push (@Apache::lonxml::pwd, $dir);
940: }
941: # &Apache::lonxml::debug("pwd:$#Apache::lonxml::pwd");
942: # &Apache::lonxml::debug("pwd:$Apache::lonxml::pwd[$#Apache::lonxml::pwd]");
943: }
944:
945: sub parstring {
946: my ($token) = @_;
947: my $temp='';
948: foreach (@{$token->[3]}) {
949: unless ($_=~/\W/) {
950: my $val=$token->[2]->{$_};
951: $val =~ s/([\%\@\\\"])/\\$1/g;
952: #if ($val =~ m/^[\%\@]/) { $val="\\".$val; }
953: $temp .= "my \$$_=\"$val\";"
954: }
955: }
956: return $temp;
957: }
958:
959: sub writeallows {
960: unless ($#extlinks>=0) { return; }
961: my $thisurl='/res/'.&Apache::lonnet::declutter(shift);
962: if ($ENV{'httpref.'.$thisurl}) {
963: $thisurl=$ENV{'httpref.'.$thisurl};
964: }
965: my $thisdir=$thisurl;
966: $thisdir=~s/\/[^\/]+$//;
967: my %httpref=();
968: foreach (@extlinks) {
969: $httpref{'httpref.'.
970: &Apache::lonnet::hreflocation($thisdir,$_)}=$thisurl;
971: }
972: @extlinks=();
973: &Apache::lonnet::appenv(%httpref);
974: }
975:
976: #
977: # Afterburner handles anchors, highlights and links
978: #
979: sub afterburn {
980: my $result=shift;
981: &Apache::loncommon::get_unprocessed_cgi($ENV{'QUERY_STRING'},
982: ['highlight','anchor','link']);
983: if ($ENV{'form.highlight'}) {
984: foreach (split(/\,/,$ENV{'form.highlight'})) {
985: my $anchorname=$_;
986: my $matchthis=$anchorname;
987: $matchthis=~s/\_+/\\s\+/g;
988: $result=~s/($matchthis)/\<font color=\"red\"\>$1\<\/font\>/gs;
989: }
990: }
991: if ($ENV{'form.link'}) {
992: foreach (split(/\,/,$ENV{'form.link'})) {
993: my ($anchorname,$linkurl)=split(/\>/,$_);
994: my $matchthis=$anchorname;
995: $matchthis=~s/\_+/\\s\+/g;
996: $result=~s/($matchthis)/\<a href=\"$linkurl\"\>$1\<\/a\>/gs;
997: }
998: }
999: if ($ENV{'form.anchor'}) {
1000: my $anchorname=$ENV{'form.anchor'};
1001: my $matchthis=$anchorname;
1002: $matchthis=~s/\_+/\\s\+/g;
1003: $result=~s/($matchthis)/\<a name=\"$anchorname\"\>$1\<\/a\>/s;
1004: $result.=(<<"ENDSCRIPT");
1005: <script>
1006: document.location.hash='$anchorname';
1007: </script>
1008: ENDSCRIPT
1009: }
1010: return $result;
1011: }
1012:
1013: sub storefile {
1014: my ($file,$contents)=@_;
1015: if (my $fh=Apache::File->new('>'.$file)) {
1016: print $fh $contents;
1017: $fh->close();
1018: } else {
1019: &warning("Unable to save file $file");
1020: }
1021: }
1022:
1023: sub createnewhtml {
1024: my $filecontents=(<<SIMPLECONTENT);
1025: <html>
1026: <head>
1027: <title>
1028: Title of Document Goes Here
1029: </title>
1030: </head>
1031: <body bgcolor="#FFFFFF">
1032:
1033: Body of Document Goes Here
1034:
1035: </body>
1036: </html>
1037: SIMPLECONTENT
1038: return $filecontents;
1039: }
1040:
1041:
1042: sub inserteditinfo {
1043: my ($result,$filecontents)=@_;
1044: $filecontents =~ s:</textarea>:</textarea>:ig;
1045: # my $editheader='<a href="#editsection">Edit below</a><hr />';
1046: my $editfooter=(<<ENDFOOTER);
1047: <hr />
1048: <a name="editsection" />
1049: <form method="post">
1050: <textarea cols="80" rows="40" name="filecont">$filecontents</textarea>
1051: <br />
1052: <input type="hidden" name="showmode" value="Edit" />
1053: <input type="submit" name="attemptclean"
1054: value="Save and then attempt to clean HTML" />
1055: <input type="submit" name="savethisfile" value="Save this" />
1056: <input type="submit" name="showmode" value="View" />
1057: </form>
1058: ENDFOOTER
1059: # $result=~s/(\<body[^\>]*\>)/$1$editheader/is;
1060: $result=~s/(\<\/body\>)/$editfooter/is;
1061: return $result;
1062: }
1063:
1064: sub get_target {
1065: my $viewgrades=&Apache::lonnet::allowed('vgr',$ENV{'request.course.id'});
1066: if ( $ENV{'request.state'} eq 'published') {
1067: if ( defined($ENV{'form.grade_target'})
1068: && ($viewgrades == 'F' )) {
1069: return ($ENV{'form.grade_target'});
1070: } elsif (defined($ENV{'form.grade_target'})) {
1071: if (($ENV{'form.grade_target'} eq 'web') ||
1072: ($ENV{'form.grade_target'} eq 'tex') ) {
1073: return $ENV{'form.grade_target'}
1074: } else {
1075: return 'web';
1076: }
1077: } else {
1078: return 'web';
1079: }
1080: } elsif ($ENV{'request.state'} eq 'construct') {
1081: if ( defined($ENV{'form.grade_target'})) {
1082: return ($ENV{'form.grade_target'});
1083: } else {
1084: return 'web';
1085: }
1086: } else {
1087: return 'web';
1088: }
1089: }
1090:
1091: sub handler {
1092: my $request=shift;
1093:
1094: my $target=&get_target();
1095:
1096: $Apache::lonxml::debug=0;
1097:
1098: if ($ENV{'browser.mathml'}) {
1099: $request->content_type('text/xml');
1100: } else {
1101: $request->content_type('text/html');
1102: }
1103: &Apache::loncommon::no_cache($request);
1104: $request->send_http_header;
1105:
1106: return OK if $request->header_only;
1107:
1108:
1109: my $file=&Apache::lonnet::filelocation("",$request->uri);
1110: #
1111: # Edit action? Save file.
1112: #
1113: unless ($ENV{'request.state'} eq 'published') {
1114: if (($ENV{'form.savethisfile'}) || ($ENV{'form.attemptclean'})) {
1115: &storefile($file,$ENV{'form.filecont'});
1116: }
1117: }
1118: my %mystyle;
1119: my $result = '';
1120: my $filecontents=&Apache::lonnet::getfile($file);
1121: if ($filecontents == -1) {
1122: $result=(<<ENDNOTFOUND);
1123: <html>
1124: <head>
1125: <title>File not found</title>
1126: </head>
1127: <body bgcolor="#FFFFFF">
1128: <b>File not found: $file</b>
1129: </body>
1130: </html>
1131: ENDNOTFOUND
1132: $filecontents='';
1133: if ($ENV{'request.state'} ne 'published') {
1134: $filecontents=&createnewhtml();
1135: $ENV{'form.showmode'}='Edit'; #force edit mode
1136: }
1137: } else {
1138: unless ($ENV{'request.state'} eq 'published') {
1139: if ($ENV{'form.attemptclean'}) {
1140: $filecontents=&htmlclean($filecontents,1);
1141: }
1142: }
1143: if ($ENV{'form.showmode'} ne 'Edit') {
1144: $result = &Apache::lonxml::xmlparse($target,$filecontents,'',%mystyle);
1145: }
1146: }
1147:
1148: #
1149: # Edit action? Insert editing commands
1150: #
1151: unless ($ENV{'request.state'} eq 'published') {
1152: if ($ENV{'form.showmode'} eq 'Edit') {
1153: $result='<html><body bgcolor="#FFFFFF"></body></html>';
1154: $result=&inserteditinfo($result,$filecontents);
1155: }
1156: }
1157:
1158: writeallows($request->uri);
1159:
1160: $request->print($result);
1161:
1162: return OK;
1163: }
1164:
1165: sub debug {
1166: if ($Apache::lonxml::debug eq 1) {
1167: $|=1;
1168: print("DEBUG:".join('<br />',@_)."<br />\n");
1169: }
1170: }
1171:
1172: sub error {
1173: if (($Apache::lonxml::debug eq 1) || ($ENV{'request.state'} eq 'construct') ) {
1174: print "<b>ERROR:</b>".join('<br />',@_)."<br />\n";
1175: } else {
1176: print "<b>An Error occured while processing this resource. The instructor has been notified.</b> <br />";
1177: #notify author
1178: &Apache::lonmsg::author_res_msg($ENV{'request.filename'},join('<br />',@_));
1179: #notify course
1180: if ( $ENV{'request.course.id'} ) {
1181: my $users=$ENV{'course.'.$ENV{'request.course.id'}.'.comment.email'};
1182: my $declutter=&Apache::lonnet::declutter($ENV{'request.filename'});
1183: foreach my $user (split /\,/, $users) {
1184: ($user,my $domain) = split /:/, $user;
1185: &Apache::lonmsg::user_normal_msg($user,$domain,
1186: "Error [$declutter]",join('<br />',@_));
1187: }
1188: }
1189:
1190: #FIXME probably shouldn't have me get everything forever.
1191: &Apache::lonmsg::user_normal_msg('albertel','msu',"Error in $ENV{'request.filename'}",join('<br />',@_));
1192: #&Apache::lonmsg::user_normal_msg('albertel','103',"Error in $ENV{'request.filename'}",$_[0]);
1193: }
1194: }
1195:
1196: sub warning {
1197: if ($ENV{'request.state'} eq 'construct') {
1198: print "<b>W</b>ARNING<b>:</b>".join('<br />',@_)."<br />\n";
1199: }
1200: }
1201:
1202: sub get_param {
1203: my ($param,$parstack,$safeeval,$context) = @_;
1204: if ( ! $context ) { $context = -1; }
1205: my $args ='';
1206: if ( $#$parstack > (-2-$context) ) { $args=$$parstack[$context]; }
1207: if ( $args =~ /my \$$param=\"/ ) {
1208: return &Apache::run::run("{$args;".'return $'.$param.'}',$safeeval); #'
1209: } else {
1210: return undef;
1211: }
1212: }
1213:
1214: sub get_param_var {
1215: my ($param,$parstack,$safeeval,$context) = @_;
1216: if ( ! $context ) { $context = -1; }
1217: my $args ='';
1218: if ( $#$parstack > (-2-$context) ) { $args=$$parstack[$context]; }
1219: if ( $args !~ /my \$$param=\"/ ) { return undef; }
1220: my $value=&Apache::run::run("{$args;".'return $'.$param.'}',$safeeval); #'
1221: if ($value =~ /^[\$\@\%]/) {
1222: return &Apache::run::run("return $value",$safeeval,1);
1223: } else {
1224: return $value;
1225: }
1226: }
1227:
1228: sub register_insert {
1229: my @data = split /\n/, &Apache::lonnet::getfile('/home/httpd/lonTabs/insertlist.tab');
1230: my $i;
1231: my $tagnum=0;
1232: my @order;
1233: for ($i=0;$i < $#data; $i++) {
1234: my $line = $data[$i];
1235: if ( $line =~ /^\#/ || $line =~ /^\s*\n/) { next; }
1236: if ( $line =~ /TABLE/ ) { last; }
1237: my ($tag,$descrip,$color,$function,$show) = split(/,/, $line);
1238: if ($tag) {
1239: $insertlist{"$tagnum.tag"} = $tag;
1240: $insertlist{"$tagnum.description"} = $descrip;
1241: $insertlist{"$tagnum.color"} = $color;
1242: $insertlist{"$tagnum.function"} = $function;
1243: if (!defined($show)) { $show='yes'; }
1244: $insertlist{"$tagnum.show"}= $show;
1245: $insertlist{"$tag.num"}=$tagnum;
1246: $tagnum++;
1247: }
1248: }
1249: $i++; #skipping TABLE line
1250: $tagnum = 0;
1251: for (;$i < $#data;$i++) {
1252: my $line = $data[$i];
1253: my ($mnemonic,@which) = split(/ +/,$line);
1254: my $tag = $insertlist{"$tagnum.tag"};
1255: for (my $j=0;$j <=$#which;$j++) {
1256: if ( $which[$j] eq 'Y' ) {
1257: if ($insertlist{"$j.show"} ne 'no') {
1258: push(@{ $insertlist{"$tag.which"} },$j);
1259: }
1260: }
1261: }
1262: $tagnum++;
1263: }
1264: }
1265:
1266: sub description {
1267: my ($token)=@_;
1268: my $tagnum;
1269: my $tag=$token->[1];
1270: foreach my $namespace (reverse @Apache::lonxml::namespace) {
1271: my $testtag=$namespace.'::'.$tag;
1272: $tagnum=$insertlist{"$testtag.num"};
1273: if (defined($tagnum)) { last; }
1274: }
1275: if (!defined ($tagnum)) { $tagnum=$Apache::lonxml::insertlist{"$tag.num"}; }
1276: return $insertlist{$tagnum.'.description'};
1277: }
1278:
1279: # ----------------------------------------------------------------- whichuser
1280: # returns a list of $symb, $courseid, $domain, $name that is correct for
1281: # calls to lonnet functions for this setup.
1282: # - looks for form.grade_ parameters
1283: sub whichuser {
1284: my ($symb,$courseid,$domain,$name);
1285: if (defined($ENV{'form.grade_symb'})) {
1286: my $tmp_courseid=$ENV{'form.grade_courseid'};
1287: my $allowed=&Apache::lonnet::allowed('mgr',$tmp_courseid);
1288: if ($allowed) {
1289: $symb=$ENV{'form.grade_symb'};
1290: $courseid=$ENV{'form.grade_courseid'};
1291: $domain=$ENV{'form.grade_domain'};
1292: $name=$ENV{'form.grade_username'};
1293: }
1294: } else {
1295: $symb=&Apache::lonnet::symbread();
1296: $courseid=$ENV{'request.course.id'};
1297: $domain=$ENV{'user.domain'};
1298: $name=$ENV{'user.name'};
1299: }
1300: return ($symb,$courseid,$domain,$name);
1301: }
1302:
1303: 1;
1304: __END__
1305:
1306:
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