1: # The LearningOnline Network with CAPA
2: # XML Parser Module
3: #
4: # $Id: lonxml.pm,v 1.159 2002/03/21 20:51:10 www 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 $evaluate %insertlist @namespace);
64: use strict;
65: use HTML::TokeParser;
66: use HTML::TreeBuilder;
67: use HTML::Entities;
68: use Safe;
69: use Safe::Hole;
70: use Math::Cephes qw(:trigs :hypers :bessels erf erfc);
71: use Math::Random qw(:all);
72: use Opcode;
73:
74: sub register {
75: my ($space,@taglist) = @_;
76: foreach my $temptag (@taglist) {
77: push(@{ $Apache::lonxml::alltags{$temptag} },$space);
78: }
79: }
80:
81: sub deregister {
82: my ($space,@taglist) = @_;
83: foreach my $temptag (@taglist) {
84: my $tempspace = $Apache::lonxml::alltags{$temptag}[-1];
85: if ($tempspace eq $space) {
86: pop(@{ $Apache::lonxml::alltags{$temptag} });
87: }
88: }
89: #&printalltags();
90: }
91:
92: use Apache::Constants qw(:common);
93: use Apache::lontexconvert;
94: use Apache::style;
95: use Apache::run;
96: use Apache::londefdef;
97: use Apache::scripttag;
98: use Apache::edit;
99: use Apache::lonnet;
100: use Apache::File;
101: use Apache::loncommon;
102:
103: #================================================== Main subroutine: xmlparse
104: #debugging control, to turn on debugging modify the correct handler
105: $Apache::lonxml::debug=0;
106:
107: #path to the directory containing the file currently being processed
108: @pwd=();
109:
110: #these two are used for capturing a subset of the output for later processing,
111: #don't touch them directly use &startredirection and &endredirection
112: @outputstack = ();
113: $redirection = 0;
114:
115: #controls wheter the <import> tag actually does
116: $import = 1;
117: @extlinks=();
118:
119: # meta mode is a bit weird only some output is to be turned off
120: #<output> tag turns metamode off (defined in londefdef.pm)
121: $metamode = 0;
122:
123: # turns on and of run::evaluate actually derefencing var refs
124: $evaluate = 1;
125:
126: # data structure for eidt mode, determines what tags can go into what other tags
127: %insertlist=();
128:
129: # stores the list of active tag namespaces
130: @namespace=();
131:
132: # has the dynamic menu been updated to know about this resource
133: $Apache::lonxml::registered=0;
134:
135: sub xmlbegin {
136: my $output='';
137: if ($ENV{'browser.mathml'}) {
138: $output='<?xml version="1.0"?>'
139: .'<?xml-stylesheet type="text/css" href="/adm/MathML/mathml.css"?>'
140: .'<!DOCTYPE html SYSTEM "/adm/MathML/mathml.dtd" '
141: .'[<!ENTITY mathns "http://www.w3.org/1998/Math/MathML">]>'
142: .'<html xmlns:math="http://www.w3.org/1998/Math/MathML" '
143: .'xmlns="http://www.w3.org/TR/REC-html40">';
144: } else {
145: $output='<html>';
146: }
147: return $output;
148: }
149:
150: sub xmlend {
151: my $discussion='';
152: if ($ENV{'request.course.id'}) {
153: my $crs='/'.$ENV{'request.course.id'};
154: if ($ENV{'request.course.sec'}) {
155: $crs.='_'.$ENV{'request.course.sec'};
156: }
157: $crs=~s/\_/\//g;
158: my $seeid=&Apache::lonnet::allowed('rin',$crs);
159: my $symb=&Apache::lonnet::symbread();
160: if ($symb) {
161: my %contrib=&Apache::lonnet::restore($symb,$ENV{'request.course.id'},
162: $ENV{'course.'.$ENV{'request.course.id'}.'.domain'},
163: $ENV{'course.'.$ENV{'request.course.id'}.'.num'});
164: if ($contrib{'version'}) {
165: $discussion.=
166: '<address><hr /><h2>Course Discussion of Resource</h2>';
167: my $idx;
168: for ($idx=1;$idx<=$contrib{'version'};$idx++) {
169: my $hidden=($contrib{'hidden'}=~/\.$idx\./);
170: unless (($hidden) && (!$seeid)) {
171: my $message=$contrib{$idx.':message'};
172: $message=~s/\n/\<br \/\>/g;
173: if ($message) {
174: if ($hidden) {
175: $message='<font color="#888888">'.$message.'</font>';
176: }
177: my $sender='Anonymous';
178: if ((!$contrib{$idx.':anonymous'}) || ($seeid)) {
179: $sender=$contrib{$idx.':sendername'}.' at '.
180: $contrib{$idx.':senderdomain'};
181: if ($contrib{$idx.':anonymous'}) {
182: $sender.=' (anonymous)';
183: }
184: if ($seeid) {
185: if ($hidden) {
186: $sender.=' <a href="/adm/feedback?unhide='.
187: $symb.':::'.$idx.'">Make Visible</a>';
188: } else {
189: $sender.=' <a href="/adm/feedback?hide='.
190: $symb.':::'.$idx.'">Hide</a>';
191: }
192: }
193: }
194: $discussion.='<p><b>'.$sender.'</b> ('.
195: localtime($contrib{$idx.':timestamp'}).
196: '):<blockquote>'.$message.
197: '</blockquote></p>';
198: }
199: }
200: }
201: $discussion.='</address>';
202: }
203: }
204: }
205: return $discussion.'</html>';
206: }
207:
208: sub tokeninputfield {
209: my $defhost=$Apache::lonnet::perlvar{'lonHostID'};
210: $defhost=~tr/a-z/A-Z/;
211: return (<<ENDINPUTFIELD)
212: <script>
213: function updatetoken() {
214: var comp=new Array;
215: var barcode=unescape(document.tokeninput.barcode.value);
216: comp=barcode.split('*');
217: if (typeof(comp[0])!="undefined") {
218: document.tokeninput.codeone.value=comp[0];
219: }
220: if (typeof(comp[1])!="undefined") {
221: document.tokeninput.codetwo.value=comp[1];
222: }
223: if (typeof(comp[2])!="undefined") {
224: comp[2]=comp[2].toUpperCase();
225: document.tokeninput.codethree.value=comp[2];
226: }
227: document.tokeninput.barcode.value='';
228: }
229: </script>
230: <form method="post" name="tokeninput">
231: <table border="2" bgcolor="#FFFFBB">
232: <tr><th>DocID Checkin</th></tr>
233: <tr><td>
234: <table>
235: <tr>
236: <td>Scan in Barcode</td>
237: <td><input type="text" size="22" name="barcode"
238: onChange="updatetoken()"/></td>
239: </tr>
240: <tr><td><i>or</i> Type in DocID</td>
241: <td>
242: <input type="text" size="5" name="codeone" />
243: <b><font size="+2">*</font></b>
244: <input type="text" size="5" name="codetwo" />
245: <b><font size="+2">*</font></b>
246: <input type="text" size="10" name="codethree" value="$defhost"
247: onChange="this.value=this.value.toUpperCase()" />
248: </td></tr>
249: </table>
250: </td></tr>
251: <tr><td><input type="submit" value="Check in DocID" /></td></tr>
252: </table>
253: </form>
254: ENDINPUTFIELD
255: }
256:
257: sub maketoken {
258: my ($symb,$tuname,$tudom,$tcrsid)=@_;
259: unless ($symb) {
260: $symb=&Apache::lonnet::symbread();
261: }
262: unless ($tuname) {
263: $tuname=$ENV{'user.name'};
264: $tudom=$ENV{'user.domain'};
265: $tcrsid=$ENV{'request.course.id'};
266: }
267:
268: return &Apache::lonnet::checkout($symb,$tuname,$tudom,$tcrsid);
269: }
270:
271: sub printtokenheader {
272: my ($target,$token,$tsymb,$tcrsid,$tudom,$tuname)=@_;
273: unless ($token) { return ''; }
274:
275: my ($symb,$courseid,$domain,$name) = &Apache::lonxml::whichuser();
276: unless ($tsymb) {
277: $tsymb=$symb;
278: }
279: unless ($tuname) {
280: $tuname=$name;
281: $tudom=$domain;
282: $tcrsid=$courseid;
283: }
284:
285: my %reply=&Apache::lonnet::get('environment',
286: ['firstname','middlename','lastname','generation'],
287: $tudom,$tuname);
288: my $plainname=$reply{'firstname'}.' '.
289: $reply{'middlename'}.' '.
290: $reply{'lastname'}.' '.
291: $reply{'generation'};
292:
293: if ($target eq 'web') {
294: my %idhash=&Apache::lonnet::idrget($tudom,($tuname));
295: return
296: '<img align="right" src="/cgi-bin/barcode.gif?encode='.$token.'" />'.
297: 'Checked out for '.$plainname.
298: '<br />User: '.$tuname.' at '.$tudom.
299: '<br />ID: '.$idhash{$tuname}.
300: '<br />CourseID: '.$tcrsid.
301: '<br />Course: '.$ENV{'course.'.$tcrsid.'.description'}.
302: '<br />DocID: '.$token.
303: '<br />Time: '.localtime().'<hr />';
304: } else {
305: return $token;
306: }
307: }
308:
309: sub fontsettings() {
310: my $headerstring='';
311: if (($ENV{'browser.os'} eq 'mac') && (!$ENV{'browser.mathml'})) {
312: $headerstring.=
313: '<meta Content-Type="text/html; charset=x-mac-roman">';
314: }
315: return $headerstring;
316: }
317:
318: sub registerurl {
319: my $forcereg=shift;
320: my $target = shift;
321: my $result = '';
322: if ($ENV{'request.publicaccess'}) {
323: return
324: '<script>function LONCAPAreg(){} function LONCAPAstale(){}</script>';
325: }
326: if ($Apache::lonxml::registered && !$forcereg) { return ''; }
327: $Apache::lonxml::registered=1;
328: my $nothing='';
329: if ($ENV{'browser.type'} eq 'explorer') { $nothing='javascript:void(0);'; }
330: if (($ENV{'REQUEST_URI'}!~/^\/(res\/)*adm\//) || ($forcereg)) {
331: my $hwkadd='';
332: if ($ENV{'REQUEST_URI'}=~/\.(problem|exam|quiz|assess|survey|form)$/) {
333: if (&Apache::lonnet::allowed('vgr',$ENV{'request.course.id'})) {
334: $hwkadd.=(<<ENDSUBM);
335: menu.switchbutton
336: (7,1,'subm.gif','view sub','missions',
337: 'gocmd("/adm/grades","submission")');
338: ENDSUBM
339: }
340: if (&Apache::lonnet::allowed('mgr',$ENV{'request.course.id'})) {
341: $hwkadd.=(<<ENDGRDS);
342: menu.switchbutton
343: (7,2,'pgrd.gif','problem','grades',
344: 'gocmd("/adm/grades","viewgrades")');
345: ENDGRDS
346: }
347: if (&Apache::lonnet::allowed('opa',$ENV{'request.course.id'})) {
348: $hwkadd.=(<<ENDPARM);
349: menu.switchbutton
350: (7,3,'pparm.gif','problem','parms',
351: 'gocmd("/adm/parmset","set")');
352: ENDPARM
353: }
354: }
355: $result = (<<ENDREGTHIS);
356:
357: <script language="JavaScript">
358: // BEGIN LON-CAPA Internal
359:
360: function LONCAPAreg() {
361: menu=window.open("$nothing","LONCAPAmenu","",false);
362: menu.clearTimeout(menu.menucltim);
363: menu.currentURL=window.location.pathname;
364: menu.currentStale=0;
365: menu.clearbut(3,1);
366: menu.switchbutton
367: (6,3,'catalog.gif','catalog','info','catalog_info()');
368: menu.switchbutton
369: (8,1,'eval.gif','evaluate','this','gopost("/adm/evaluate",currentURL)');
370: menu.switchbutton
371: (8,2,'fdbk.gif','feedback','on this','gopost("/adm/feedback",currentURL)');
372: menu.switchbutton
373: (8,3,'prt.gif','prepare','printout','gopost("/adm/printout",currentURL)');
374: menu.switchbutton
375: (2,1,'back.gif','backward','','gopost("/adm/flip","back:"+currentURL)');
376: menu.switchbutton
377: (2,3,'forw.gif','forward','','gopost("/adm/flip","forward:"+currentURL)');
378: menu.switchbutton
379: (9,1,'sbkm.gif','set','bookmark','set_bookmark()');
380: menu.switchbutton
381: (9,2,'vbkm.gif','view','bookmark','edit_bookmarks()');
382: menu.switchbutton
383: (9,3,'anot.gif','anno-','tations','annotate()');
384: $hwkadd
385: }
386:
387: function LONCAPAstale() {
388: menu=window.open("$nothing","LONCAPAmenu","",false);
389: menu.currentStale=1;
390: menu.switchbutton
391: (3,1,'reload.gif','return','location','go(currentURL)');
392: menu.clearbut(7,1);
393: menu.clearbut(7,2);
394: menu.clearbut(7,3);
395: menu.menucltim=menu.setTimeout(
396: 'clearbut(2,1);clearbut(2,3);clearbut(8,1);clearbut(8,2);clearbut(8,3);'+
397: 'clearbut(9,1);clearbut(9,2);clearbut(9,3);clearbut(6,3)',
398: 2000);
399:
400: }
401:
402: // END LON-CAPA Internal
403: </script>
404: ENDREGTHIS
405:
406: } else {
407: $result = (<<ENDDONOTREGTHIS);
408:
409: <script language="JavaScript">
410: // BEGIN LON-CAPA Internal
411:
412: function LONCAPAreg() {
413: menu=window.open("$nothing","LONCAPAmenu","",false);
414: menu.currentStale=1;
415: menu.clearbut(2,1);
416: menu.clearbut(2,3);
417: menu.clearbut(8,1);
418: menu.clearbut(8,2);
419: menu.clearbut(8,3);
420: if (menu.currentURL) {
421: menu.switchbutton
422: (3,1,'reload.gif','return','location','go(currentURL)');
423: } else {
424: menu.clearbut(3,1);
425: }
426: }
427:
428: function LONCAPAstale() {
429: }
430:
431: // END LON-CAPA Internal
432: </script>
433: ENDDONOTREGTHIS
434: }
435: if ($target eq 'edit') {
436: # Javascript routines for construction space:
437: # openbrowser and opensearcher will start the file browser
438: # (lonindexer) and searcher (lonsearchcat) respectively.
439: # Inputs are the name of the html form being used
440: # and the name of the element the selected URL should
441: # be placed in.
442: $result .=<<"ENDBROWSERSCRIPT";
443: <script>
444: var editbrowser;
445: function openbrowser(formname,elementname) {
446: var url = '/res/?';
447: if (editbrowser == null) {
448: url += 'launch=1&';
449: }
450: url += 'catalogmode=interactive&';
451: url += 'mode=edit&';
452: url += 'form=' + formname + '&';
453: url += 'element=' + elementname + '';
454: var title = 'Browser';
455: var options = 'scrollbars=1,resizable=1,menubar=0';
456: options += ',width=700,height=600';
457: editbrowser = open(url,title,options,'1');
458: editbrowser.focus();
459: }
460: var editsearcher;
461: function opensearcher(formname,elementname) {
462: var url = '/adm/searchcat?';
463: if (editsearcher == null) {
464: url += 'launch=1&';
465: }
466: url += 'catalogmode=interactive&';
467: url += 'mode=edit&';
468: url += 'form=' + formname + '&';
469: url += 'element=' + elementname + '';
470: var title = 'Search';
471: var options = 'scrollbars=1,resizable=1,menubar=0';
472: options += ',width=700,height=600';
473: editsearcher = open(url,title,options,'1');
474: editsearcher.focus();
475: }
476: </script>
477: ENDBROWSERSCRIPT
478: }
479: return $result;
480: }
481:
482: sub loadevents() {
483: return 'LONCAPAreg();';
484: }
485:
486: sub unloadevents() {
487: return 'LONCAPAstale();';
488: }
489:
490: sub printalltags {
491: my $temp;
492: foreach $temp (sort keys %Apache::lonxml::alltags) {
493: &Apache::lonxml::debug("$temp -- ".
494: join(',',@{ $Apache::lonxml::alltags{$temp} }));
495: }
496: }
497:
498: sub xmlparse {
499: my ($target,$content_file_string,$safeinit,%style_for_target) = @_;
500:
501: &setup_globals($target);
502: #&printalltags();
503: my @pars = ();
504: my $pwd=$ENV{'request.filename'};
505: $pwd =~ s:/[^/]*$::;
506: &newparser(\@pars,\$content_file_string,$pwd);
507:
508: my $safeeval = new Safe;
509: my $safehole = new Safe::Hole;
510: &init_safespace($target,$safeeval,$safehole,$safeinit);
511: #-------------------- Redefinition of the target in the case of compound target
512:
513: ($target, my @tenta) = split('&&',$target);
514:
515: my @stack = ();
516: my @parstack = ();
517: &initdepth;
518:
519: my $finaloutput = &inner_xmlparse($target,\@stack,\@parstack,\@pars,
520: $safeeval,\%style_for_target);
521: if ($ENV{'request.uri'}) {
522: &writeallows($ENV{'request.uri'});
523: }
524: return $finaloutput;
525: }
526:
527: sub htmlclean {
528: my ($raw,$full)=@_;
529:
530: my $tree = HTML::TreeBuilder->new;
531: $tree->ignore_unknown(0);
532:
533: $tree->parse($raw);
534:
535: my $output= $tree->as_HTML(undef,' ');
536:
537: $output=~s/\<(br|hr|img|meta|allow)([^\>\/]*)\>/\<$1$2 \/\>/gis;
538: $output=~s/\<\/(br|hr|img|meta|allow)\>//gis;
539: unless ($full) {
540: $output=~s/\<[\/]*(body|head|html)\>//gis;
541: }
542:
543: $tree = $tree->delete;
544:
545: return $output;
546: }
547:
548: sub inner_xmlparse {
549: my ($target,$stack,$parstack,$pars,$safeeval,$style_for_target)=@_;
550: my $finaloutput = '';
551: my $result;
552: my $token;
553: while ( $#$pars > -1 ) {
554: while ($token = $$pars['-1']->get_token) {
555: if (($token->[0] eq 'T') || ($token->[0] eq 'C') || ($token->[0] eq 'D') ) {
556: if ($metamode<1) {
557: $result=$token->[1];
558: }
559: } elsif ($token->[0] eq 'PI') {
560: if ($metamode<1) {
561: $result=$token->[2];
562: }
563: } elsif ($token->[0] eq 'S') {
564: # add tag to stack
565: push (@$stack,$token->[1]);
566: # add parameters list to another stack
567: push (@$parstack,&parstring($token));
568: &increasedepth($token);
569: if (exists $$style_for_target{$token->[1]}) {
570: if ($Apache::lonxml::redirection) {
571: $Apache::lonxml::outputstack['-1'] .=
572: &recurse($$style_for_target{$token->[1]},$target,$safeeval,
573: $style_for_target,@$parstack);
574: } else {
575: $finaloutput .= &recurse($$style_for_target{$token->[1]},$target,
576: $safeeval,$style_for_target,@$parstack);
577: }
578: } else {
579: $result = &callsub("start_$token->[1]", $target, $token, $stack,
580: $parstack, $pars, $safeeval, $style_for_target);
581: }
582: } elsif ($token->[0] eq 'E') {
583: #clear out any tags that didn't end
584: while ($token->[1] ne $$stack['-1'] && ($#$stack > -1)) {
585: my $lasttag=$$stack[-1];
586: if ($token->[1] =~ /^$lasttag$/i) {
587: &Apache::lonxml::warning('Using tag </'.$token->[1].'> as end tag to <'.$$stack[-1].'>');
588: last;
589: } else {
590: &Apache::lonxml::warning('Found tag </'.$token->[1].'> when looking for </'.$$stack[-1].'> in file');
591: &end_tag($stack,$parstack,$token);
592: }
593: }
594:
595: if (exists($$style_for_target{'/'."$token->[1]"})) {
596: if ($Apache::lonxml::redirection) {
597: $Apache::lonxml::outputstack['-1'] .=
598: &recurse($$style_for_target{'/'."$token->[1]"},
599: $target,$safeeval,$style_for_target,@$parstack);
600: } else {
601: $finaloutput .= &recurse($$style_for_target{'/'."$token->[1]"},
602: $target,$safeeval,$style_for_target,
603: @$parstack);
604: }
605: } else {
606: $result = &callsub("end_$token->[1]", $target, $token, $stack,
607: $parstack, $pars,$safeeval, $style_for_target);
608: }
609: } else {
610: &Apache::lonxml::error("Unknown token event :$token->[0]:$token->[1]:");
611: }
612: #evaluate variable refs in result
613: if ($result ne "") {
614: if ( $#$parstack > -1 ) {
615: if ($Apache::lonxml::redirection) {
616: $Apache::lonxml::outputstack['-1'] .=
617: &Apache::run::evaluate($result,$safeeval,$$parstack['-1']);
618: } else {
619: $finaloutput .= &Apache::run::evaluate($result,$safeeval,
620: $$parstack['-1']);
621: }
622: } else {
623: $finaloutput .= &Apache::run::evaluate($result,$safeeval,'');
624: }
625: $result = '';
626: }
627: if ($token->[0] eq 'E') {
628: &end_tag($stack,$parstack,$token);
629: }
630: }
631: pop @$pars;
632: pop @Apache::lonxml::pwd;
633: }
634:
635: # if ($target eq 'meta') {
636: # $finaloutput.=&endredirection;
637: # }
638:
639: if (($ENV{'QUERY_STRING'}) && ($target eq 'web')) {
640: $finaloutput=&afterburn($finaloutput);
641: }
642: return $finaloutput;
643: }
644:
645: sub recurse {
646: my @innerstack = ();
647: my @innerparstack = ();
648: my ($newarg,$target,$safeeval,$style_for_target,@parstack) = @_;
649: my @pat = ();
650: &newparser(\@pat,\$newarg);
651: my $tokenpat;
652: my $partstring = '';
653: my $output='';
654: my $decls='';
655: &Apache::lonxml::debug("Recursing");
656: while ( $#pat > -1 ) {
657: while ($tokenpat = $pat[$#pat]->get_token) {
658: if (($tokenpat->[0] eq 'T') || ($tokenpat->[0] eq 'C') || ($tokenpat->[0] eq 'D') ) {
659: if ($metamode<1) { $partstring=$tokenpat->[1]; }
660: } elsif ($tokenpat->[0] eq 'PI') {
661: if ($metamode<1) { $partstring=$tokenpat->[2]; }
662: } elsif ($tokenpat->[0] eq 'S') {
663: push (@innerstack,$tokenpat->[1]);
664: push (@innerparstack,&parstring($tokenpat));
665: &increasedepth($tokenpat);
666: $partstring = &callsub("start_$tokenpat->[1]", $target, $tokenpat,
667: \@innerstack, \@innerparstack, \@pat,
668: $safeeval, $style_for_target);
669: } elsif ($tokenpat->[0] eq 'E') {
670: #clear out any tags that didn't end
671: while ($tokenpat->[1] ne $innerstack[$#innerstack]
672: && ($#innerstack > -1)) {
673: my $lasttag=$innerstack[-1];
674: if ($tokenpat->[1] =~ /^$lasttag$/i) {
675: &Apache::lonxml::warning('Using tag </'.$tokenpat->[1].'> as end tag to <'.$innerstack[-1].'>');
676: last;
677: } else {
678: &Apache::lonxml::warning('Found tag </'.$tokenpat->[1].'> when looking for </'.$innerstack[-1].'> in file');
679: &end_tag(\@innerstack,\@innerparstack,$tokenpat);
680: }
681: }
682: $partstring = &callsub("end_$tokenpat->[1]", $target, $tokenpat,
683: \@innerstack, \@innerparstack, \@pat,
684: $safeeval, $style_for_target);
685: } else {
686: &Apache::lonxml::error("Unknown token event :$tokenpat->[0]:$tokenpat->[1]:");
687: }
688: #pass both the variable to the style tag, and the tag we
689: #are processing inside the <definedtag>
690: if ( $partstring ne "" ) {
691: if ( $#parstack > -1 ) {
692: if ( $#innerparstack > -1 ) {
693: $decls= $parstack[$#parstack].$innerparstack[$#innerparstack];
694: } else {
695: $decls= $parstack[$#parstack];
696: }
697: } else {
698: if ( $#innerparstack > -1 ) {
699: $decls=$innerparstack[$#innerparstack];
700: } else {
701: $decls='';
702: }
703: }
704: $output .= &Apache::run::evaluate($partstring,$safeeval,$decls);
705: $partstring = '';
706: }
707: if ($tokenpat->[0] eq 'E') { pop @innerstack;pop @innerparstack;
708: &decreasedepth($tokenpat);}
709: }
710: pop @pat;
711: pop @Apache::lonxml::pwd;
712: }
713: &Apache::lonxml::debug("Exiting Recursing");
714: return $output;
715: }
716:
717: sub callsub {
718: my ($sub,$target,$token,$tagstack,$parstack,$parser,$safeeval,$style)=@_;
719: my $currentstring='';
720: my $nodefault;
721: {
722: my $sub1;
723: no strict 'refs';
724: my $tag=$token->[1];
725: my $space=$Apache::lonxml::alltags{$tag}[-1];
726: if (!$space) {
727: $tag=~tr/A-Z/a-z/;
728: $sub=~tr/A-Z/a-z/;
729: $space=$Apache::lonxml::alltags{$tag}[-1]
730: }
731:
732: my $deleted=0;
733: $Apache::lonxml::curdepth=join('_',@Apache::lonxml::depthcounter);
734: if (($token->[0] eq 'S') && ($target eq 'modified')) {
735: $deleted=&Apache::edit::handle_delete($space,$target,$token,$tagstack,
736: $parstack,$parser,$safeeval,
737: $style);
738: }
739: if (!$deleted) {
740: if ($space) {
741: #&Apache::lonxml::debug("Calling sub $sub in $space $metamode");
742: $sub1="$space\:\:$sub";
743: ($currentstring,$nodefault) = &$sub1($target,$token,$tagstack,
744: $parstack,$parser,$safeeval,
745: $style);
746: } else {
747: #&Apache::lonxml::debug("NOT Calling sub $sub in $space $metamode");
748: if ($metamode <1) {
749: if (defined($token->[4]) && ($metamode < 1)) {
750: $currentstring = $token->[4];
751: } else {
752: $currentstring = $token->[2];
753: }
754: }
755: }
756: # &Apache::lonxml::debug("nodefalt:$nodefault:");
757: if ($currentstring eq '' && $nodefault eq '') {
758: if ($target eq 'edit') {
759: &Apache::lonxml::debug("doing default edit for $token->[1]");
760: if ($token->[0] eq 'S') {
761: $currentstring = &Apache::edit::tag_start($target,$token);
762: } elsif ($token->[0] eq 'E') {
763: $currentstring = &Apache::edit::tag_end($target,$token);
764: }
765: } elsif ($target eq 'modified') {
766: if ($token->[0] eq 'S') {
767: $currentstring = $token->[4];
768: $currentstring.=&Apache::edit::handle_insert();
769: } else {
770: $currentstring = $token->[2];
771: }
772: }
773: }
774: }
775: use strict 'refs';
776: }
777: return $currentstring;
778: }
779:
780: sub setup_globals {
781: my ($target)=@_;
782: $Apache::lonxml::registered = 0;
783: @Apache::lonxml::pwd=();
784: @Apache::lonxml::extlinks=();
785: if ($target eq 'meta') {
786: $Apache::lonxml::redirection = 0;
787: $Apache::lonxml::metamode = 1;
788: $Apache::lonxml::evaluate = 1;
789: $Apache::lonxml::import = 0;
790: } elsif ($target eq 'answer') {
791: $Apache::lonxml::redirection = 0;
792: $Apache::lonxml::metamode = 1;
793: $Apache::lonxml::evaluate = 1;
794: $Apache::lonxml::import = 1;
795: } elsif ($target eq 'grade') {
796: &startredirection;
797: $Apache::lonxml::metamode = 0;
798: $Apache::lonxml::evaluate = 1;
799: $Apache::lonxml::import = 1;
800: } elsif ($target eq 'modified') {
801: $Apache::lonxml::redirection = 0;
802: $Apache::lonxml::metamode = 0;
803: $Apache::lonxml::evaluate = 0;
804: $Apache::lonxml::import = 0;
805: } elsif ($target eq 'edit') {
806: $Apache::lonxml::redirection = 0;
807: $Apache::lonxml::metamode = 0;
808: $Apache::lonxml::evaluate = 0;
809: $Apache::lonxml::import = 0;
810: } else {
811: $Apache::lonxml::redirection = 0;
812: $Apache::lonxml::metamode = 0;
813: $Apache::lonxml::evaluate = 1;
814: $Apache::lonxml::import = 1;
815: }
816: }
817:
818: sub init_safespace {
819: my ($target,$safeeval,$safehole,$safeinit) = @_;
820: $safeeval->permit("entereval");
821: $safeeval->permit(":base_math");
822: $safeeval->permit("sort");
823: $safeeval->deny(":base_io");
824: $safehole->wrap(\&Apache::scripttag::xmlparse,$safeeval,'&xmlparse');
825: $safehole->wrap(\&Apache::lonnet::EXT,$safeeval,'&EXT');
826:
827: $safehole->wrap(\&Math::Cephes::asin,$safeeval,'&asin');
828: $safehole->wrap(\&Math::Cephes::acos,$safeeval,'&acos');
829: $safehole->wrap(\&Math::Cephes::atan,$safeeval,'&atan');
830: $safehole->wrap(\&Math::Cephes::sinh,$safeeval,'&sinh');
831: $safehole->wrap(\&Math::Cephes::cosh,$safeeval,'&cosh');
832: $safehole->wrap(\&Math::Cephes::tanh,$safeeval,'&tanh');
833: $safehole->wrap(\&Math::Cephes::asinh,$safeeval,'&asinh');
834: $safehole->wrap(\&Math::Cephes::acosh,$safeeval,'&acosh');
835: $safehole->wrap(\&Math::Cephes::atanh,$safeeval,'&atanh');
836: $safehole->wrap(\&Math::Cephes::erf,$safeeval,'&erf');
837: $safehole->wrap(\&Math::Cephes::erfc,$safeeval,'&erfc');
838: $safehole->wrap(\&Math::Cephes::j0,$safeeval,'&j0');
839: $safehole->wrap(\&Math::Cephes::j1,$safeeval,'&j1');
840: $safehole->wrap(\&Math::Cephes::jn,$safeeval,'&jn');
841: $safehole->wrap(\&Math::Cephes::jv,$safeeval,'&jv');
842: $safehole->wrap(\&Math::Cephes::y0,$safeeval,'&y0');
843: $safehole->wrap(\&Math::Cephes::y1,$safeeval,'&y1');
844: $safehole->wrap(\&Math::Cephes::yn,$safeeval,'&yn');
845: $safehole->wrap(\&Math::Cephes::yv,$safeeval,'&yv');
846: $safehole->wrap(\&Math::Random::random_beta,$safeeval,'&math_random_beta');
847: $safehole->wrap(\&Math::Random::random_chi_square,$safeeval,'&math_random_chi_square');
848: $safehole->wrap(\&Math::Random::random_exponential,$safeeval,'&math_random_exponential');
849: $safehole->wrap(\&Math::Random::random_f,$safeeval,'&math_random_f');
850: $safehole->wrap(\&Math::Random::random_gamma,$safeeval,'&math_random_gamma');
851: $safehole->wrap(\&Math::Random::random_multivariate_normal,$safeeval,'&math_random_multivariate_normal');
852: $safehole->wrap(\&Math::Random::random_multinomial,$safeeval,'&math_random_multinomial');
853: $safehole->wrap(\&Math::Random::random_noncentral_chi_square,$safeeval,'&math_random_noncentral_chi_square');
854: $safehole->wrap(\&Math::Random::random_noncentral_f,$safeeval,'&math_random_noncentral_f');
855: $safehole->wrap(\&Math::Random::random_normal,$safeeval,'&math_random_normal');
856: $safehole->wrap(\&Math::Random::random_permutation,$safeeval,'&math_random_permutation');
857: $safehole->wrap(\&Math::Random::random_permuted_index,$safeeval,'&math_random_permuted_index');
858: $safehole->wrap(\&Math::Random::random_uniform,$safeeval,'&math_random_uniform');
859: $safehole->wrap(\&Math::Random::random_poisson,$safeeval,'&math_random_poisson');
860: $safehole->wrap(\&Math::Random::random_uniform_integer,$safeeval,'&math_random_uniform_integer');
861: $safehole->wrap(\&Math::Random::random_negative_binomial,$safeeval,'&math_random_negative_binomial');
862: $safehole->wrap(\&Math::Random::random_binomial,$safeeval,'&math_random_binomial');
863: $safehole->wrap(\&Math::Random::random_seed_from_phrase,$safeeval,'&random_seed_from_phrase');
864: $safehole->wrap(\&Math::Random::random_set_seed_from_phrase,$safeeval,'&random_set_seed_from_phrase');
865: $safehole->wrap(\&Math::Random::random_get_seed,$safeeval,'&random_get_seed');
866: $safehole->wrap(\&Math::Random::random_set_seed,$safeeval,'&random_set_seed');
867:
868: #need to inspect this class of ops
869: # $safeeval->deny(":base_orig");
870: $safeinit .= ';$external::target="'.$target.'";';
871: my $rndseed;
872: my ($symb,$courseid,$domain,$name) = &Apache::lonxml::whichuser();
873: $rndseed=&Apache::lonnet::rndseed($symb,$courseid,$domain,$name);
874: $safeinit .= ';$external::randomseed='.$rndseed.';';
875: &Apache::run::run($safeinit,$safeeval);
876: }
877:
878: sub startredirection {
879: $Apache::lonxml::redirection++;
880: push (@Apache::lonxml::outputstack, '');
881: }
882:
883: sub endredirection {
884: if (!$Apache::lonxml::redirection) {
885: &Apache::lonxml::error("Endredirection was called, before a startredirection, perhaps you have unbalanced tags. Some debuging information:".join ":",caller);
886: return '';
887: }
888: $Apache::lonxml::redirection--;
889: pop @Apache::lonxml::outputstack;
890: }
891:
892: sub end_tag {
893: my ($tagstack,$parstack,$token)=@_;
894: pop(@$tagstack);
895: pop(@$parstack);
896: &decreasedepth($token);
897: }
898:
899: sub initdepth {
900: @Apache::lonxml::depthcounter=();
901: $Apache::lonxml::depth=-1;
902: $Apache::lonxml::olddepth=-1;
903: }
904:
905: sub increasedepth {
906: my ($token) = @_;
907: $Apache::lonxml::depth++;
908: $Apache::lonxml::depthcounter[$Apache::lonxml::depth]++;
909: if ($Apache::lonxml::depthcounter[$Apache::lonxml::depth]==1) {
910: $Apache::lonxml::olddepth=$Apache::lonxml::depth;
911: }
912: my $curdepth=join('_',@Apache::lonxml::depthcounter);
913: &Apache::lonxml::debug("s $Apache::lonxml::depth : $Apache::lonxml::olddepth : $curdepth : $token->[1]\n");
914: #print "<br />s $Apache::lonxml::depth : $Apache::lonxml::olddepth : $curdepth : $token->[1]\n";
915: }
916:
917: sub decreasedepth {
918: my ($token) = @_;
919: $Apache::lonxml::depth--;
920: if ($Apache::lonxml::depth<$Apache::lonxml::olddepth-1) {
921: $#Apache::lonxml::depthcounter--;
922: $Apache::lonxml::olddepth=$Apache::lonxml::depth+1;
923: }
924: if ( $Apache::lonxml::depth < -1) {
925: &Apache::lonxml::warning("Missing tags, unable to properly run file.");
926: $Apache::lonxml::depth='-1';
927: }
928: my $curdepth=join('_',@Apache::lonxml::depthcounter);
929: &Apache::lonxml::debug("e $Apache::lonxml::depth : $Apache::lonxml::olddepth : $token->[1] : $curdepth\n");
930: #print "<br />e $Apache::lonxml::depth : $Apache::lonxml::olddepth : $token->[1] : $curdepth\n";
931: }
932:
933: sub get_all_text {
934:
935: my($tag,$pars)= @_;
936: my $depth=0;
937: my $token;
938: my $result='';
939: if ( $tag =~ m:^/: ) {
940: my $tag=substr($tag,1);
941: # &Apache::lonxml::debug("have:$tag:");
942: while (($depth >=0) && ($token = $pars->get_token)) {
943: # &Apache::lonxml::debug("e token:$token->[0]:$depth:$token->[1]");
944: if (($token->[0] eq 'T')||($token->[0] eq 'C')||($token->[0] eq 'D')) {
945: $result.=$token->[1];
946: } elsif ($token->[0] eq 'PI') {
947: $result.=$token->[2];
948: } elsif ($token->[0] eq 'S') {
949: if ($token->[1] =~ /^$tag$/i) { $depth++; }
950: $result.=$token->[4];
951: } elsif ($token->[0] eq 'E') {
952: if ( $token->[1] =~ /^$tag$/i) { $depth--; }
953: #skip sending back the last end tag
954: if ($depth > -1) { $result.=$token->[2]; } else {
955: $pars->unget_token($token);
956: }
957: }
958: }
959: } else {
960: while ($token = $pars->get_token) {
961: # &Apache::lonxml::debug("s token:$token->[0]:$depth:$token->[1]");
962: if (($token->[0] eq 'T')||($token->[0] eq 'C')||($token->[0] eq 'D')) {
963: $result.=$token->[1];
964: } elsif ($token->[0] eq 'PI') {
965: $result.=$token->[2];
966: } elsif ($token->[0] eq 'S') {
967: if ( $token->[1] =~ /^$tag$/i) {
968: $pars->unget_token($token); last;
969: } else {
970: $result.=$token->[4];
971: }
972: } elsif ($token->[0] eq 'E') {
973: $result.=$token->[2];
974: }
975: }
976: }
977: # &Apache::lonxml::debug("Exit:$result:");
978: return $result
979: }
980:
981: sub newparser {
982: my ($parser,$contentref,$dir) = @_;
983: push (@$parser,HTML::TokeParser->new($contentref));
984: $$parser['-1']->xml_mode('1');
985: if ( $dir eq '' ) {
986: push (@Apache::lonxml::pwd, $Apache::lonxml::pwd[$#Apache::lonxml::pwd]);
987: } else {
988: push (@Apache::lonxml::pwd, $dir);
989: }
990: # &Apache::lonxml::debug("pwd:$#Apache::lonxml::pwd");
991: # &Apache::lonxml::debug("pwd:$Apache::lonxml::pwd[$#Apache::lonxml::pwd]");
992: }
993:
994: sub parstring {
995: my ($token) = @_;
996: my $temp='';
997: foreach (@{$token->[3]}) {
998: unless ($_=~/\W/) {
999: my $val=$token->[2]->{$_};
1000: $val =~ s/([\%\@\\\"])/\\$1/g;
1001: #if ($val =~ m/^[\%\@]/) { $val="\\".$val; }
1002: $temp .= "my \$$_=\"$val\";"
1003: }
1004: }
1005: return $temp;
1006: }
1007:
1008: sub writeallows {
1009: unless ($#extlinks>=0) { return; }
1010: my $thisurl='/res/'.&Apache::lonnet::declutter(shift);
1011: if ($ENV{'httpref.'.$thisurl}) {
1012: $thisurl=$ENV{'httpref.'.$thisurl};
1013: }
1014: my $thisdir=$thisurl;
1015: $thisdir=~s/\/[^\/]+$//;
1016: my %httpref=();
1017: foreach (@extlinks) {
1018: $httpref{'httpref.'.
1019: &Apache::lonnet::hreflocation($thisdir,$_)}=$thisurl;
1020: }
1021: @extlinks=();
1022: &Apache::lonnet::appenv(%httpref);
1023: }
1024:
1025: #
1026: # Afterburner handles anchors, highlights and links
1027: #
1028: sub afterburn {
1029: my $result=shift;
1030: &Apache::loncommon::get_unprocessed_cgi($ENV{'QUERY_STRING'},
1031: ['highlight','anchor','link']);
1032: if ($ENV{'form.highlight'}) {
1033: foreach (split(/\,/,$ENV{'form.highlight'})) {
1034: my $anchorname=$_;
1035: my $matchthis=$anchorname;
1036: $matchthis=~s/\_+/\\s\+/g;
1037: $result=~s/($matchthis)/\<font color=\"red\"\>$1\<\/font\>/gs;
1038: }
1039: }
1040: if ($ENV{'form.link'}) {
1041: foreach (split(/\,/,$ENV{'form.link'})) {
1042: my ($anchorname,$linkurl)=split(/\>/,$_);
1043: my $matchthis=$anchorname;
1044: $matchthis=~s/\_+/\\s\+/g;
1045: $result=~s/($matchthis)/\<a href=\"$linkurl\"\>$1\<\/a\>/gs;
1046: }
1047: }
1048: if ($ENV{'form.anchor'}) {
1049: my $anchorname=$ENV{'form.anchor'};
1050: my $matchthis=$anchorname;
1051: $matchthis=~s/\_+/\\s\+/g;
1052: $result=~s/($matchthis)/\<a name=\"$anchorname\"\>$1\<\/a\>/s;
1053: $result.=(<<"ENDSCRIPT");
1054: <script>
1055: document.location.hash='$anchorname';
1056: </script>
1057: ENDSCRIPT
1058: }
1059: return $result;
1060: }
1061:
1062: sub storefile {
1063: my ($file,$contents)=@_;
1064: if (my $fh=Apache::File->new('>'.$file)) {
1065: print $fh $contents;
1066: $fh->close();
1067: } else {
1068: &warning("Unable to save file $file");
1069: }
1070: }
1071:
1072: sub createnewhtml {
1073: my $filecontents=(<<SIMPLECONTENT);
1074: <html>
1075: <head>
1076: <title>
1077: Title of Document Goes Here
1078: </title>
1079: </head>
1080: <body bgcolor="#FFFFFF">
1081:
1082: Body of Document Goes Here
1083:
1084: </body>
1085: </html>
1086: SIMPLECONTENT
1087: return $filecontents;
1088: }
1089:
1090:
1091: sub inserteditinfo {
1092: my ($result,$filecontents)=@_;
1093: $filecontents = &HTML::Entities::encode($filecontents);
1094: # my $editheader='<a href="#editsection">Edit below</a><hr />';
1095: my $editfooter=(<<ENDFOOTER);
1096: <hr />
1097: <a name="editsection" />
1098: <form method="post">
1099: <textarea cols="80" rows="40" name="filecont">$filecontents</textarea>
1100: <br />
1101: <input type="hidden" name="showmode" value="Edit" />
1102: <input type="submit" name="attemptclean"
1103: value="Save and then attempt to clean HTML" />
1104: <input type="submit" name="savethisfile" value="Save this" />
1105: <input type="submit" name="showmode" value="View" />
1106: </form>
1107: ENDFOOTER
1108: # $result=~s/(\<body[^\>]*\>)/$1$editheader/is;
1109: $result=~s/(\<\/body\>)/$editfooter/is;
1110: return $result;
1111: }
1112:
1113: sub get_target {
1114: my $viewgrades=&Apache::lonnet::allowed('vgr',$ENV{'request.course.id'});
1115: if ( $ENV{'request.state'} eq 'published') {
1116: if ( defined($ENV{'form.grade_target'})
1117: && ($viewgrades == 'F' )) {
1118: return ($ENV{'form.grade_target'});
1119: } elsif (defined($ENV{'form.grade_target'})) {
1120: if (($ENV{'form.grade_target'} eq 'web') ||
1121: ($ENV{'form.grade_target'} eq 'tex') ) {
1122: return $ENV{'form.grade_target'}
1123: } else {
1124: return 'web';
1125: }
1126: } else {
1127: return 'web';
1128: }
1129: } elsif ($ENV{'request.state'} eq 'construct') {
1130: if ( defined($ENV{'form.grade_target'})) {
1131: return ($ENV{'form.grade_target'});
1132: } else {
1133: return 'web';
1134: }
1135: } else {
1136: return 'web';
1137: }
1138: }
1139:
1140: sub handler {
1141: my $request=shift;
1142:
1143: my $target=&get_target();
1144:
1145: $Apache::lonxml::debug=0;
1146:
1147: if ($ENV{'browser.mathml'}) {
1148: $request->content_type('text/xml');
1149: } else {
1150: $request->content_type('text/html');
1151: }
1152: &Apache::loncommon::no_cache($request);
1153: $request->send_http_header;
1154:
1155: return OK if $request->header_only;
1156:
1157:
1158: my $file=&Apache::lonnet::filelocation("",$request->uri);
1159: #
1160: # Edit action? Save file.
1161: #
1162: unless ($ENV{'request.state'} eq 'published') {
1163: if (($ENV{'form.savethisfile'}) || ($ENV{'form.attemptclean'})) {
1164: &storefile($file,$ENV{'form.filecont'});
1165: }
1166: }
1167: my %mystyle;
1168: my $result = '';
1169: my $filecontents=&Apache::lonnet::getfile($file);
1170: if ($filecontents == -1) {
1171: $result=(<<ENDNOTFOUND);
1172: <html>
1173: <head>
1174: <title>File not found</title>
1175: </head>
1176: <body bgcolor="#FFFFFF">
1177: <b>File not found: $file</b>
1178: </body>
1179: </html>
1180: ENDNOTFOUND
1181: $filecontents='';
1182: if ($ENV{'request.state'} ne 'published') {
1183: $filecontents=&createnewhtml();
1184: $ENV{'form.showmode'}='Edit'; #force edit mode
1185: }
1186: } else {
1187: unless ($ENV{'request.state'} eq 'published') {
1188: if ($ENV{'form.attemptclean'}) {
1189: $filecontents=&htmlclean($filecontents,1);
1190: }
1191: }
1192: if ($ENV{'form.showmode'} ne 'Edit') {
1193: $result = &Apache::lonxml::xmlparse($target,$filecontents,'',%mystyle);
1194: }
1195: }
1196:
1197: #
1198: # Edit action? Insert editing commands
1199: #
1200: unless ($ENV{'request.state'} eq 'published') {
1201: if ($ENV{'form.showmode'} eq 'Edit') {
1202: $result='<html><body bgcolor="#FFFFFF"></body></html>';
1203: $result=&inserteditinfo($result,$filecontents);
1204: }
1205: }
1206:
1207: writeallows($request->uri);
1208:
1209: $request->print($result);
1210:
1211: return OK;
1212: }
1213:
1214: sub debug {
1215: if ($Apache::lonxml::debug eq 1) {
1216: $|=1;
1217: print("DEBUG:".join('<br />',@_)."<br />\n");
1218: }
1219: }
1220:
1221: sub error {
1222: if (($Apache::lonxml::debug eq 1) || ($ENV{'request.state'} eq 'construct') ) {
1223: print "<b>ERROR:</b>".join('<br />',@_)."<br />\n";
1224: } else {
1225: print "<b>An Error occured while processing this resource. The instructor has been notified.</b> <br />";
1226: #notify author
1227: &Apache::lonmsg::author_res_msg($ENV{'request.filename'},join('<br />',@_));
1228: #notify course
1229: if ( $ENV{'request.course.id'} ) {
1230: my $users=$ENV{'course.'.$ENV{'request.course.id'}.'.comment.email'};
1231: my $declutter=&Apache::lonnet::declutter($ENV{'request.filename'});
1232: foreach my $user (split /\,/, $users) {
1233: ($user,my $domain) = split /:/, $user;
1234: &Apache::lonmsg::user_normal_msg($user,$domain,
1235: "Error [$declutter]",join('<br />',@_));
1236: }
1237: }
1238:
1239: #FIXME probably shouldn't have me get everything forever.
1240: &Apache::lonmsg::user_normal_msg('albertel','msu',"Error in $ENV{'request.filename'}",join('<br />',@_));
1241: #&Apache::lonmsg::user_normal_msg('albertel','103',"Error in $ENV{'request.filename'}",$_[0]);
1242: }
1243: }
1244:
1245: sub warning {
1246: if ($ENV{'request.state'} eq 'construct') {
1247: print "<b>W</b>ARNING<b>:</b>".join('<br />',@_)."<br />\n";
1248: }
1249: }
1250:
1251: sub get_param {
1252: my ($param,$parstack,$safeeval,$context) = @_;
1253: if ( ! $context ) { $context = -1; }
1254: my $args ='';
1255: if ( $#$parstack > (-2-$context) ) { $args=$$parstack[$context]; }
1256: if ( ! $args ) { return undef; }
1257: if ( $args =~ /my \$$param=\"/ ) {
1258: return &Apache::run::run("{$args;".'return $'.$param.'}',$safeeval); #'
1259: } else {
1260: return undef;
1261: }
1262: }
1263:
1264: sub get_param_var {
1265: my ($param,$parstack,$safeeval,$context) = @_;
1266: if ( ! $context ) { $context = -1; }
1267: my $args ='';
1268: if ( $#$parstack > (-2-$context) ) { $args=$$parstack[$context]; }
1269: if ( $args !~ /my \$$param=\"/ ) { return undef; }
1270: my $value=&Apache::run::run("{$args;".'return $'.$param.'}',$safeeval); #'
1271: if ($value =~ /^[\$\@\%]/) {
1272: return &Apache::run::run("return $value",$safeeval,1);
1273: } else {
1274: return $value;
1275: }
1276: }
1277:
1278: sub register_insert {
1279: my @data = split /\n/, &Apache::lonnet::getfile('/home/httpd/lonTabs/insertlist.tab');
1280: my $i;
1281: my $tagnum=0;
1282: my @order;
1283: for ($i=0;$i < $#data; $i++) {
1284: my $line = $data[$i];
1285: if ( $line =~ /^\#/ || $line =~ /^\s*\n/) { next; }
1286: if ( $line =~ /TABLE/ ) { last; }
1287: my ($tag,$descrip,$color,$function,$show) = split(/,/, $line);
1288: if ($tag) {
1289: $insertlist{"$tagnum.tag"} = $tag;
1290: $insertlist{"$tagnum.description"} = $descrip;
1291: $insertlist{"$tagnum.color"} = $color;
1292: $insertlist{"$tagnum.function"} = $function;
1293: if (!defined($show)) { $show='yes'; }
1294: $insertlist{"$tagnum.show"}= $show;
1295: $insertlist{"$tag.num"}=$tagnum;
1296: $tagnum++;
1297: }
1298: }
1299: $i++; #skipping TABLE line
1300: $tagnum = 0;
1301: for (;$i < $#data;$i++) {
1302: my $line = $data[$i];
1303: my ($mnemonic,@which) = split(/ +/,$line);
1304: my $tag = $insertlist{"$tagnum.tag"};
1305: for (my $j=0;$j <=$#which;$j++) {
1306: if ( $which[$j] eq 'Y' ) {
1307: if ($insertlist{"$j.show"} ne 'no') {
1308: push(@{ $insertlist{"$tag.which"} },$j);
1309: }
1310: }
1311: }
1312: $tagnum++;
1313: }
1314: }
1315:
1316: sub description {
1317: my ($token)=@_;
1318: my $tagnum;
1319: my $tag=$token->[1];
1320: foreach my $namespace (reverse @Apache::lonxml::namespace) {
1321: my $testtag=$namespace.'::'.$tag;
1322: $tagnum=$insertlist{"$testtag.num"};
1323: if (defined($tagnum)) { last; }
1324: }
1325: if (!defined ($tagnum)) { $tagnum=$Apache::lonxml::insertlist{"$tag.num"}; }
1326: return $insertlist{$tagnum.'.description'};
1327: }
1328:
1329: # ----------------------------------------------------------------- whichuser
1330: # returns a list of $symb, $courseid, $domain, $name that is correct for
1331: # calls to lonnet functions for this setup.
1332: # - looks for form.grade_ parameters
1333: sub whichuser {
1334: my ($symb,$courseid,$domain,$name);
1335: if (defined($ENV{'form.grade_symb'})) {
1336: my $tmp_courseid=$ENV{'form.grade_courseid'};
1337: my $allowed=&Apache::lonnet::allowed('mgr',$tmp_courseid);
1338: if ($allowed) {
1339: $symb=$ENV{'form.grade_symb'};
1340: $courseid=$ENV{'form.grade_courseid'};
1341: $domain=$ENV{'form.grade_domain'};
1342: $name=$ENV{'form.grade_username'};
1343: }
1344: } else {
1345: $symb=&Apache::lonnet::symbread();
1346: $courseid=$ENV{'request.course.id'};
1347: $domain=$ENV{'user.domain'};
1348: $name=$ENV{'user.name'};
1349: }
1350: return ($symb,$courseid,$domain,$name);
1351: }
1352:
1353: 1;
1354: __END__
1355:
1356:
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