1: # The LearningOnline Network with CAPA
2: # XML Parser Module
3: #
4: # $Id: lonxml.pm,v 1.158 2002/03/18 21:51:34 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: # 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: $Apache::lonxml::registered=1;
328: if (($ENV{'REQUEST_URI'}!~/^\/(res\/)*adm\//) || ($forcereg)) {
329: my $hwkadd='';
330: if ($ENV{'REQUEST_URI'}=~/\.(problem|exam|quiz|assess|survey|form)$/) {
331: if (&Apache::lonnet::allowed('vgr',$ENV{'request.course.id'})) {
332: $hwkadd.=(<<ENDSUBM);
333: menu.switchbutton
334: (7,1,'subm.gif','view sub','missions',
335: 'gocmd("/adm/grades","submission")');
336: ENDSUBM
337: }
338: if (&Apache::lonnet::allowed('mgr',$ENV{'request.course.id'})) {
339: $hwkadd.=(<<ENDGRDS);
340: menu.switchbutton
341: (7,2,'pgrd.gif','problem','grades',
342: 'gocmd("/adm/grades","viewgrades")');
343: ENDGRDS
344: }
345: if (&Apache::lonnet::allowed('opa',$ENV{'request.course.id'})) {
346: $hwkadd.=(<<ENDPARM);
347: menu.switchbutton
348: (7,3,'pparm.gif','problem','parms',
349: 'gocmd("/adm/parmset","set")');
350: ENDPARM
351: }
352: }
353: $result = (<<ENDREGTHIS);
354:
355: <script language="JavaScript">
356: // BEGIN LON-CAPA Internal
357:
358: function LONCAPAreg() {
359: menu=window.open("","LONCAPAmenu","",false);
360: menu.clearTimeout(menu.menucltim);
361: menu.currentURL=window.location.pathname;
362: menu.currentStale=0;
363: menu.clearbut(3,1);
364: menu.switchbutton
365: (6,3,'catalog.gif','catalog','info','catalog_info()');
366: menu.switchbutton
367: (8,1,'eval.gif','evaluate','this','gopost("/adm/evaluate",currentURL)');
368: menu.switchbutton
369: (8,2,'fdbk.gif','feedback','on this','gopost("/adm/feedback",currentURL)');
370: menu.switchbutton
371: (8,3,'prt.gif','prepare','printout','gopost("/adm/printout",currentURL)');
372: menu.switchbutton
373: (2,1,'back.gif','backward','','gopost("/adm/flip","back:"+currentURL)');
374: menu.switchbutton
375: (2,3,'forw.gif','forward','','gopost("/adm/flip","forward:"+currentURL)');
376: menu.switchbutton
377: (9,1,'sbkm.gif','set','bookmark','set_bookmark()');
378: menu.switchbutton
379: (9,2,'vbkm.gif','view','bookmark','edit_bookmarks()');
380: menu.switchbutton
381: (9,3,'anot.gif','anno-','tations','annotate()');
382: $hwkadd
383: }
384:
385: function LONCAPAstale() {
386: menu=window.open("","LONCAPAmenu","",false);
387: menu.currentStale=1;
388: menu.switchbutton
389: (3,1,'reload.gif','return','location','go(currentURL)');
390: menu.clearbut(7,1);
391: menu.clearbut(7,2);
392: menu.clearbut(7,3);
393: menu.menucltim=menu.setTimeout(
394: 'clearbut(2,1);clearbut(2,3);clearbut(8,1);clearbut(8,2);clearbut(8,3);'+
395: 'clearbut(9,1);clearbut(9,2);clearbut(9,3);clearbut(6,3)',
396: 2000);
397:
398: }
399:
400: // END LON-CAPA Internal
401: </script>
402: ENDREGTHIS
403:
404: } else {
405: $result = (<<ENDDONOTREGTHIS);
406:
407: <script language="JavaScript">
408: // BEGIN LON-CAPA Internal
409:
410: function LONCAPAreg() {
411: menu=window.open("","LONCAPAmenu","",false);
412: menu.currentStale=1;
413: menu.clearbut(2,1);
414: menu.clearbut(2,3);
415: menu.clearbut(8,1);
416: menu.clearbut(8,2);
417: menu.clearbut(8,3);
418: if (menu.currentURL) {
419: menu.switchbutton
420: (3,1,'reload.gif','return','location','go(currentURL)');
421: } else {
422: menu.clearbut(3,1);
423: }
424: }
425:
426: function LONCAPAstale() {
427: }
428:
429: // END LON-CAPA Internal
430: </script>
431: ENDDONOTREGTHIS
432: }
433: if ($target eq 'edit') {
434: # Javascript routines for construction space:
435: # openbrowser and opensearcher will start the file browser
436: # (lonindexer) and searcher (lonsearchcat) respectively.
437: # Inputs are the name of the html form being used
438: # and the name of the element the selected URL should
439: # be placed in.
440: $result .=<<"ENDBROWSERSCRIPT";
441: <script>
442: var editbrowser;
443: function openbrowser(formname,elementname) {
444: var url = '/res/?';
445: if (editbrowser == null) {
446: url += 'launch=1&';
447: }
448: url += 'catalogmode=interactive&';
449: url += 'mode=edit&';
450: url += 'form=' + formname + '&';
451: url += 'element=' + elementname + '';
452: var title = 'Browser';
453: var options = 'scrollbars=1,resizable=1,menubar=0';
454: options += ',width=700,height=600';
455: editbrowser = open(url,title,options,'1');
456: editbrowser.focus();
457: }
458: var editsearcher;
459: function opensearcher(formname,elementname) {
460: var url = '/adm/searchcat?';
461: if (editsearcher == null) {
462: url += 'launch=1&';
463: }
464: url += 'catalogmode=interactive&';
465: url += 'mode=edit&';
466: url += 'form=' + formname + '&';
467: url += 'element=' + elementname + '';
468: var title = 'Search';
469: var options = 'scrollbars=1,resizable=1,menubar=0';
470: options += ',width=700,height=600';
471: editsearcher = open(url,title,options,'1');
472: editsearcher.focus();
473: }
474: </script>
475: ENDBROWSERSCRIPT
476: }
477: return $result;
478: }
479:
480: sub loadevents() {
481: return 'LONCAPAreg();';
482: }
483:
484: sub unloadevents() {
485: return 'LONCAPAstale();';
486: }
487:
488: sub printalltags {
489: my $temp;
490: foreach $temp (sort keys %Apache::lonxml::alltags) {
491: &Apache::lonxml::debug("$temp -- ".
492: join(',',@{ $Apache::lonxml::alltags{$temp} }));
493: }
494: }
495:
496: sub xmlparse {
497: my ($target,$content_file_string,$safeinit,%style_for_target) = @_;
498:
499: &setup_globals($target);
500: #&printalltags();
501: my @pars = ();
502: my $pwd=$ENV{'request.filename'};
503: $pwd =~ s:/[^/]*$::;
504: &newparser(\@pars,\$content_file_string,$pwd);
505:
506: my $safeeval = new Safe;
507: my $safehole = new Safe::Hole;
508: &init_safespace($target,$safeeval,$safehole,$safeinit);
509: #-------------------- Redefinition of the target in the case of compound target
510:
511: ($target, my @tenta) = split('&&',$target);
512:
513: my @stack = ();
514: my @parstack = ();
515: &initdepth;
516:
517: my $finaloutput = &inner_xmlparse($target,\@stack,\@parstack,\@pars,
518: $safeeval,\%style_for_target);
519: if ($ENV{'request.uri'}) {
520: &writeallows($ENV{'request.uri'});
521: }
522: return $finaloutput;
523: }
524:
525: sub htmlclean {
526: my ($raw,$full)=@_;
527:
528: my $tree = HTML::TreeBuilder->new;
529: $tree->ignore_unknown(0);
530:
531: $tree->parse($raw);
532:
533: my $output= $tree->as_HTML(undef,' ');
534:
535: $output=~s/\<(br|hr|img|meta|allow)([^\>\/]*)\>/\<$1$2 \/\>/gis;
536: $output=~s/\<\/(br|hr|img|meta|allow)\>//gis;
537: unless ($full) {
538: $output=~s/\<[\/]*(body|head|html)\>//gis;
539: }
540:
541: $tree = $tree->delete;
542:
543: return $output;
544: }
545:
546: sub inner_xmlparse {
547: my ($target,$stack,$parstack,$pars,$safeeval,$style_for_target)=@_;
548: my $finaloutput = '';
549: my $result;
550: my $token;
551: while ( $#$pars > -1 ) {
552: while ($token = $$pars['-1']->get_token) {
553: if (($token->[0] eq 'T') || ($token->[0] eq 'C') || ($token->[0] eq 'D') ) {
554: if ($metamode<1) {
555: $result=$token->[1];
556: }
557: } elsif ($token->[0] eq 'PI') {
558: if ($metamode<1) {
559: $result=$token->[2];
560: }
561: } elsif ($token->[0] eq 'S') {
562: # add tag to stack
563: push (@$stack,$token->[1]);
564: # add parameters list to another stack
565: push (@$parstack,&parstring($token));
566: &increasedepth($token);
567: if (exists $$style_for_target{$token->[1]}) {
568: if ($Apache::lonxml::redirection) {
569: $Apache::lonxml::outputstack['-1'] .=
570: &recurse($$style_for_target{$token->[1]},$target,$safeeval,
571: $style_for_target,@$parstack);
572: } else {
573: $finaloutput .= &recurse($$style_for_target{$token->[1]},$target,
574: $safeeval,$style_for_target,@$parstack);
575: }
576: } else {
577: $result = &callsub("start_$token->[1]", $target, $token, $stack,
578: $parstack, $pars, $safeeval, $style_for_target);
579: }
580: } elsif ($token->[0] eq 'E') {
581: #clear out any tags that didn't end
582: while ($token->[1] ne $$stack['-1'] && ($#$stack > -1)) {
583: my $lasttag=$$stack[-1];
584: if ($token->[1] =~ /^$lasttag$/i) {
585: &Apache::lonxml::warning('Using tag </'.$token->[1].'> as end tag to <'.$$stack[-1].'>');
586: last;
587: } else {
588: &Apache::lonxml::warning('Found tag </'.$token->[1].'> when looking for </'.$$stack[-1].'> in file');
589: &end_tag($stack,$parstack,$token);
590: }
591: }
592:
593: if (exists($$style_for_target{'/'."$token->[1]"})) {
594: if ($Apache::lonxml::redirection) {
595: $Apache::lonxml::outputstack['-1'] .=
596: &recurse($$style_for_target{'/'."$token->[1]"},
597: $target,$safeeval,$style_for_target,@$parstack);
598: } else {
599: $finaloutput .= &recurse($$style_for_target{'/'."$token->[1]"},
600: $target,$safeeval,$style_for_target,
601: @$parstack);
602: }
603: } else {
604: $result = &callsub("end_$token->[1]", $target, $token, $stack,
605: $parstack, $pars,$safeeval, $style_for_target);
606: }
607: } else {
608: &Apache::lonxml::error("Unknown token event :$token->[0]:$token->[1]:");
609: }
610: #evaluate variable refs in result
611: if ($result ne "") {
612: if ( $#$parstack > -1 ) {
613: if ($Apache::lonxml::redirection) {
614: $Apache::lonxml::outputstack['-1'] .=
615: &Apache::run::evaluate($result,$safeeval,$$parstack['-1']);
616: } else {
617: $finaloutput .= &Apache::run::evaluate($result,$safeeval,
618: $$parstack['-1']);
619: }
620: } else {
621: $finaloutput .= &Apache::run::evaluate($result,$safeeval,'');
622: }
623: $result = '';
624: }
625: if ($token->[0] eq 'E') {
626: &end_tag($stack,$parstack,$token);
627: }
628: }
629: pop @$pars;
630: pop @Apache::lonxml::pwd;
631: }
632:
633: # if ($target eq 'meta') {
634: # $finaloutput.=&endredirection;
635: # }
636:
637: if (($ENV{'QUERY_STRING'}) && ($target eq 'web')) {
638: $finaloutput=&afterburn($finaloutput);
639: }
640: return $finaloutput;
641: }
642:
643: sub recurse {
644: my @innerstack = ();
645: my @innerparstack = ();
646: my ($newarg,$target,$safeeval,$style_for_target,@parstack) = @_;
647: my @pat = ();
648: &newparser(\@pat,\$newarg);
649: my $tokenpat;
650: my $partstring = '';
651: my $output='';
652: my $decls='';
653: &Apache::lonxml::debug("Recursing");
654: while ( $#pat > -1 ) {
655: while ($tokenpat = $pat[$#pat]->get_token) {
656: if (($tokenpat->[0] eq 'T') || ($tokenpat->[0] eq 'C') || ($tokenpat->[0] eq 'D') ) {
657: if ($metamode<1) { $partstring=$tokenpat->[1]; }
658: } elsif ($tokenpat->[0] eq 'PI') {
659: if ($metamode<1) { $partstring=$tokenpat->[2]; }
660: } elsif ($tokenpat->[0] eq 'S') {
661: push (@innerstack,$tokenpat->[1]);
662: push (@innerparstack,&parstring($tokenpat));
663: &increasedepth($tokenpat);
664: $partstring = &callsub("start_$tokenpat->[1]", $target, $tokenpat,
665: \@innerstack, \@innerparstack, \@pat,
666: $safeeval, $style_for_target);
667: } elsif ($tokenpat->[0] eq 'E') {
668: #clear out any tags that didn't end
669: while ($tokenpat->[1] ne $innerstack[$#innerstack]
670: && ($#innerstack > -1)) {
671: my $lasttag=$innerstack[-1];
672: if ($tokenpat->[1] =~ /^$lasttag$/i) {
673: &Apache::lonxml::warning('Using tag </'.$tokenpat->[1].'> as end tag to <'.$innerstack[-1].'>');
674: last;
675: } else {
676: &Apache::lonxml::warning('Found tag </'.$tokenpat->[1].'> when looking for </'.$innerstack[-1].'> in file');
677: &end_tag(\@innerstack,\@innerparstack,$tokenpat);
678: }
679: }
680: $partstring = &callsub("end_$tokenpat->[1]", $target, $tokenpat,
681: \@innerstack, \@innerparstack, \@pat,
682: $safeeval, $style_for_target);
683: } else {
684: &Apache::lonxml::error("Unknown token event :$tokenpat->[0]:$tokenpat->[1]:");
685: }
686: #pass both the variable to the style tag, and the tag we
687: #are processing inside the <definedtag>
688: if ( $partstring ne "" ) {
689: if ( $#parstack > -1 ) {
690: if ( $#innerparstack > -1 ) {
691: $decls= $parstack[$#parstack].$innerparstack[$#innerparstack];
692: } else {
693: $decls= $parstack[$#parstack];
694: }
695: } else {
696: if ( $#innerparstack > -1 ) {
697: $decls=$innerparstack[$#innerparstack];
698: } else {
699: $decls='';
700: }
701: }
702: $output .= &Apache::run::evaluate($partstring,$safeeval,$decls);
703: $partstring = '';
704: }
705: if ($tokenpat->[0] eq 'E') { pop @innerstack;pop @innerparstack;
706: &decreasedepth($tokenpat);}
707: }
708: pop @pat;
709: pop @Apache::lonxml::pwd;
710: }
711: &Apache::lonxml::debug("Exiting Recursing");
712: return $output;
713: }
714:
715: sub callsub {
716: my ($sub,$target,$token,$tagstack,$parstack,$parser,$safeeval,$style)=@_;
717: my $currentstring='';
718: my $nodefault;
719: {
720: my $sub1;
721: no strict 'refs';
722: my $tag=$token->[1];
723: my $space=$Apache::lonxml::alltags{$tag}[-1];
724: if (!$space) {
725: $tag=~tr/A-Z/a-z/;
726: $sub=~tr/A-Z/a-z/;
727: $space=$Apache::lonxml::alltags{$tag}[-1]
728: }
729:
730: my $deleted=0;
731: $Apache::lonxml::curdepth=join('_',@Apache::lonxml::depthcounter);
732: if (($token->[0] eq 'S') && ($target eq 'modified')) {
733: $deleted=&Apache::edit::handle_delete($space,$target,$token,$tagstack,
734: $parstack,$parser,$safeeval,
735: $style);
736: }
737: if (!$deleted) {
738: if ($space) {
739: #&Apache::lonxml::debug("Calling sub $sub in $space $metamode");
740: $sub1="$space\:\:$sub";
741: ($currentstring,$nodefault) = &$sub1($target,$token,$tagstack,
742: $parstack,$parser,$safeeval,
743: $style);
744: } else {
745: #&Apache::lonxml::debug("NOT Calling sub $sub in $space $metamode");
746: if ($metamode <1) {
747: if (defined($token->[4]) && ($metamode < 1)) {
748: $currentstring = $token->[4];
749: } else {
750: $currentstring = $token->[2];
751: }
752: }
753: }
754: # &Apache::lonxml::debug("nodefalt:$nodefault:");
755: if ($currentstring eq '' && $nodefault eq '') {
756: if ($target eq 'edit') {
757: &Apache::lonxml::debug("doing default edit for $token->[1]");
758: if ($token->[0] eq 'S') {
759: $currentstring = &Apache::edit::tag_start($target,$token);
760: } elsif ($token->[0] eq 'E') {
761: $currentstring = &Apache::edit::tag_end($target,$token);
762: }
763: } elsif ($target eq 'modified') {
764: if ($token->[0] eq 'S') {
765: $currentstring = $token->[4];
766: $currentstring.=&Apache::edit::handle_insert();
767: } else {
768: $currentstring = $token->[2];
769: }
770: }
771: }
772: }
773: use strict 'refs';
774: }
775: return $currentstring;
776: }
777:
778: sub setup_globals {
779: my ($target)=@_;
780: $Apache::lonxml::registered = 0;
781: @Apache::lonxml::pwd=();
782: @Apache::lonxml::extlinks=();
783: if ($target eq 'meta') {
784: $Apache::lonxml::redirection = 0;
785: $Apache::lonxml::metamode = 1;
786: $Apache::lonxml::evaluate = 1;
787: $Apache::lonxml::import = 0;
788: } elsif ($target eq 'answer') {
789: $Apache::lonxml::redirection = 0;
790: $Apache::lonxml::metamode = 1;
791: $Apache::lonxml::evaluate = 1;
792: $Apache::lonxml::import = 1;
793: } elsif ($target eq 'grade') {
794: &startredirection;
795: $Apache::lonxml::metamode = 0;
796: $Apache::lonxml::evaluate = 1;
797: $Apache::lonxml::import = 1;
798: } elsif ($target eq 'modified') {
799: $Apache::lonxml::redirection = 0;
800: $Apache::lonxml::metamode = 0;
801: $Apache::lonxml::evaluate = 0;
802: $Apache::lonxml::import = 0;
803: } elsif ($target eq 'edit') {
804: $Apache::lonxml::redirection = 0;
805: $Apache::lonxml::metamode = 0;
806: $Apache::lonxml::evaluate = 0;
807: $Apache::lonxml::import = 0;
808: } else {
809: $Apache::lonxml::redirection = 0;
810: $Apache::lonxml::metamode = 0;
811: $Apache::lonxml::evaluate = 1;
812: $Apache::lonxml::import = 1;
813: }
814: }
815:
816: sub init_safespace {
817: my ($target,$safeeval,$safehole,$safeinit) = @_;
818: $safeeval->permit("entereval");
819: $safeeval->permit(":base_math");
820: $safeeval->permit("sort");
821: $safeeval->deny(":base_io");
822: $safehole->wrap(\&Apache::scripttag::xmlparse,$safeeval,'&xmlparse');
823: $safehole->wrap(\&Apache::lonnet::EXT,$safeeval,'&EXT');
824:
825: $safehole->wrap(\&Math::Cephes::asin,$safeeval,'&asin');
826: $safehole->wrap(\&Math::Cephes::acos,$safeeval,'&acos');
827: $safehole->wrap(\&Math::Cephes::atan,$safeeval,'&atan');
828: $safehole->wrap(\&Math::Cephes::sinh,$safeeval,'&sinh');
829: $safehole->wrap(\&Math::Cephes::cosh,$safeeval,'&cosh');
830: $safehole->wrap(\&Math::Cephes::tanh,$safeeval,'&tanh');
831: $safehole->wrap(\&Math::Cephes::asinh,$safeeval,'&asinh');
832: $safehole->wrap(\&Math::Cephes::acosh,$safeeval,'&acosh');
833: $safehole->wrap(\&Math::Cephes::atanh,$safeeval,'&atanh');
834: $safehole->wrap(\&Math::Cephes::erf,$safeeval,'&erf');
835: $safehole->wrap(\&Math::Cephes::erfc,$safeeval,'&erfc');
836: $safehole->wrap(\&Math::Cephes::j0,$safeeval,'&j0');
837: $safehole->wrap(\&Math::Cephes::j1,$safeeval,'&j1');
838: $safehole->wrap(\&Math::Cephes::jn,$safeeval,'&jn');
839: $safehole->wrap(\&Math::Cephes::jv,$safeeval,'&jv');
840: $safehole->wrap(\&Math::Cephes::y0,$safeeval,'&y0');
841: $safehole->wrap(\&Math::Cephes::y1,$safeeval,'&y1');
842: $safehole->wrap(\&Math::Cephes::yn,$safeeval,'&yn');
843: $safehole->wrap(\&Math::Cephes::yv,$safeeval,'&yv');
844: $safehole->wrap(\&Math::Random::random_beta,$safeeval,'&math_random_beta');
845: $safehole->wrap(\&Math::Random::random_chi_square,$safeeval,'&math_random_chi_square');
846: $safehole->wrap(\&Math::Random::random_exponential,$safeeval,'&math_random_exponential');
847: $safehole->wrap(\&Math::Random::random_f,$safeeval,'&math_random_f');
848: $safehole->wrap(\&Math::Random::random_gamma,$safeeval,'&math_random_gamma');
849: $safehole->wrap(\&Math::Random::random_multivariate_normal,$safeeval,'&math_random_multivariate_normal');
850: $safehole->wrap(\&Math::Random::random_multinomial,$safeeval,'&math_random_multinomial');
851: $safehole->wrap(\&Math::Random::random_noncentral_chi_square,$safeeval,'&math_random_noncentral_chi_square');
852: $safehole->wrap(\&Math::Random::random_noncentral_f,$safeeval,'&math_random_noncentral_f');
853: $safehole->wrap(\&Math::Random::random_normal,$safeeval,'&math_random_normal');
854: $safehole->wrap(\&Math::Random::random_permutation,$safeeval,'&math_random_permutation');
855: $safehole->wrap(\&Math::Random::random_permuted_index,$safeeval,'&math_random_permuted_index');
856: $safehole->wrap(\&Math::Random::random_uniform,$safeeval,'&math_random_uniform');
857: $safehole->wrap(\&Math::Random::random_poisson,$safeeval,'&math_random_poisson');
858: $safehole->wrap(\&Math::Random::random_uniform_integer,$safeeval,'&math_random_uniform_integer');
859: $safehole->wrap(\&Math::Random::random_negative_binomial,$safeeval,'&math_random_negative_binomial');
860: $safehole->wrap(\&Math::Random::random_binomial,$safeeval,'&math_random_binomial');
861: $safehole->wrap(\&Math::Random::random_seed_from_phrase,$safeeval,'&random_seed_from_phrase');
862: $safehole->wrap(\&Math::Random::random_set_seed_from_phrase,$safeeval,'&random_set_seed_from_phrase');
863: $safehole->wrap(\&Math::Random::random_get_seed,$safeeval,'&random_get_seed');
864: $safehole->wrap(\&Math::Random::random_set_seed,$safeeval,'&random_set_seed');
865:
866: #need to inspect this class of ops
867: # $safeeval->deny(":base_orig");
868: $safeinit .= ';$external::target="'.$target.'";';
869: my $rndseed;
870: my ($symb,$courseid,$domain,$name) = &Apache::lonxml::whichuser();
871: $rndseed=&Apache::lonnet::rndseed($symb,$courseid,$domain,$name);
872: $safeinit .= ';$external::randomseed='.$rndseed.';';
873: &Apache::run::run($safeinit,$safeeval);
874: }
875:
876: sub startredirection {
877: $Apache::lonxml::redirection++;
878: push (@Apache::lonxml::outputstack, '');
879: }
880:
881: sub endredirection {
882: if (!$Apache::lonxml::redirection) {
883: &Apache::lonxml::error("Endredirection was called, before a startredirection, perhaps you have unbalanced tags. Some debuging information:".join ":",caller);
884: return '';
885: }
886: $Apache::lonxml::redirection--;
887: pop @Apache::lonxml::outputstack;
888: }
889:
890: sub end_tag {
891: my ($tagstack,$parstack,$token)=@_;
892: pop(@$tagstack);
893: pop(@$parstack);
894: &decreasedepth($token);
895: }
896:
897: sub initdepth {
898: @Apache::lonxml::depthcounter=();
899: $Apache::lonxml::depth=-1;
900: $Apache::lonxml::olddepth=-1;
901: }
902:
903: sub increasedepth {
904: my ($token) = @_;
905: $Apache::lonxml::depth++;
906: $Apache::lonxml::depthcounter[$Apache::lonxml::depth]++;
907: if ($Apache::lonxml::depthcounter[$Apache::lonxml::depth]==1) {
908: $Apache::lonxml::olddepth=$Apache::lonxml::depth;
909: }
910: my $curdepth=join('_',@Apache::lonxml::depthcounter);
911: &Apache::lonxml::debug("s $Apache::lonxml::depth : $Apache::lonxml::olddepth : $curdepth : $token->[1]\n");
912: #print "<br />s $Apache::lonxml::depth : $Apache::lonxml::olddepth : $curdepth : $token->[1]\n";
913: }
914:
915: sub decreasedepth {
916: my ($token) = @_;
917: $Apache::lonxml::depth--;
918: if ($Apache::lonxml::depth<$Apache::lonxml::olddepth-1) {
919: $#Apache::lonxml::depthcounter--;
920: $Apache::lonxml::olddepth=$Apache::lonxml::depth+1;
921: }
922: if ( $Apache::lonxml::depth < -1) {
923: &Apache::lonxml::warning("Missing tags, unable to properly run file.");
924: $Apache::lonxml::depth='-1';
925: }
926: my $curdepth=join('_',@Apache::lonxml::depthcounter);
927: &Apache::lonxml::debug("e $Apache::lonxml::depth : $Apache::lonxml::olddepth : $token->[1] : $curdepth\n");
928: #print "<br />e $Apache::lonxml::depth : $Apache::lonxml::olddepth : $token->[1] : $curdepth\n";
929: }
930:
931: sub get_all_text {
932:
933: my($tag,$pars)= @_;
934: my $depth=0;
935: my $token;
936: my $result='';
937: if ( $tag =~ m:^/: ) {
938: my $tag=substr($tag,1);
939: # &Apache::lonxml::debug("have:$tag:");
940: while (($depth >=0) && ($token = $pars->get_token)) {
941: # &Apache::lonxml::debug("e token:$token->[0]:$depth:$token->[1]");
942: if (($token->[0] eq 'T')||($token->[0] eq 'C')||($token->[0] eq 'D')) {
943: $result.=$token->[1];
944: } elsif ($token->[0] eq 'PI') {
945: $result.=$token->[2];
946: } elsif ($token->[0] eq 'S') {
947: if ($token->[1] =~ /^$tag$/i) { $depth++; }
948: $result.=$token->[4];
949: } elsif ($token->[0] eq 'E') {
950: if ( $token->[1] =~ /^$tag$/i) { $depth--; }
951: #skip sending back the last end tag
952: if ($depth > -1) { $result.=$token->[2]; } else {
953: $pars->unget_token($token);
954: }
955: }
956: }
957: } else {
958: while ($token = $pars->get_token) {
959: # &Apache::lonxml::debug("s token:$token->[0]:$depth:$token->[1]");
960: if (($token->[0] eq 'T')||($token->[0] eq 'C')||($token->[0] eq 'D')) {
961: $result.=$token->[1];
962: } elsif ($token->[0] eq 'PI') {
963: $result.=$token->[2];
964: } elsif ($token->[0] eq 'S') {
965: if ( $token->[1] =~ /^$tag$/i) {
966: $pars->unget_token($token); last;
967: } else {
968: $result.=$token->[4];
969: }
970: } elsif ($token->[0] eq 'E') {
971: $result.=$token->[2];
972: }
973: }
974: }
975: # &Apache::lonxml::debug("Exit:$result:");
976: return $result
977: }
978:
979: sub newparser {
980: my ($parser,$contentref,$dir) = @_;
981: push (@$parser,HTML::TokeParser->new($contentref));
982: $$parser['-1']->xml_mode('1');
983: if ( $dir eq '' ) {
984: push (@Apache::lonxml::pwd, $Apache::lonxml::pwd[$#Apache::lonxml::pwd]);
985: } else {
986: push (@Apache::lonxml::pwd, $dir);
987: }
988: # &Apache::lonxml::debug("pwd:$#Apache::lonxml::pwd");
989: # &Apache::lonxml::debug("pwd:$Apache::lonxml::pwd[$#Apache::lonxml::pwd]");
990: }
991:
992: sub parstring {
993: my ($token) = @_;
994: my $temp='';
995: foreach (@{$token->[3]}) {
996: unless ($_=~/\W/) {
997: my $val=$token->[2]->{$_};
998: $val =~ s/([\%\@\\\"])/\\$1/g;
999: #if ($val =~ m/^[\%\@]/) { $val="\\".$val; }
1000: $temp .= "my \$$_=\"$val\";"
1001: }
1002: }
1003: return $temp;
1004: }
1005:
1006: sub writeallows {
1007: unless ($#extlinks>=0) { return; }
1008: my $thisurl='/res/'.&Apache::lonnet::declutter(shift);
1009: if ($ENV{'httpref.'.$thisurl}) {
1010: $thisurl=$ENV{'httpref.'.$thisurl};
1011: }
1012: my $thisdir=$thisurl;
1013: $thisdir=~s/\/[^\/]+$//;
1014: my %httpref=();
1015: foreach (@extlinks) {
1016: $httpref{'httpref.'.
1017: &Apache::lonnet::hreflocation($thisdir,$_)}=$thisurl;
1018: }
1019: @extlinks=();
1020: &Apache::lonnet::appenv(%httpref);
1021: }
1022:
1023: #
1024: # Afterburner handles anchors, highlights and links
1025: #
1026: sub afterburn {
1027: my $result=shift;
1028: &Apache::loncommon::get_unprocessed_cgi($ENV{'QUERY_STRING'},
1029: ['highlight','anchor','link']);
1030: if ($ENV{'form.highlight'}) {
1031: foreach (split(/\,/,$ENV{'form.highlight'})) {
1032: my $anchorname=$_;
1033: my $matchthis=$anchorname;
1034: $matchthis=~s/\_+/\\s\+/g;
1035: $result=~s/($matchthis)/\<font color=\"red\"\>$1\<\/font\>/gs;
1036: }
1037: }
1038: if ($ENV{'form.link'}) {
1039: foreach (split(/\,/,$ENV{'form.link'})) {
1040: my ($anchorname,$linkurl)=split(/\>/,$_);
1041: my $matchthis=$anchorname;
1042: $matchthis=~s/\_+/\\s\+/g;
1043: $result=~s/($matchthis)/\<a href=\"$linkurl\"\>$1\<\/a\>/gs;
1044: }
1045: }
1046: if ($ENV{'form.anchor'}) {
1047: my $anchorname=$ENV{'form.anchor'};
1048: my $matchthis=$anchorname;
1049: $matchthis=~s/\_+/\\s\+/g;
1050: $result=~s/($matchthis)/\<a name=\"$anchorname\"\>$1\<\/a\>/s;
1051: $result.=(<<"ENDSCRIPT");
1052: <script>
1053: document.location.hash='$anchorname';
1054: </script>
1055: ENDSCRIPT
1056: }
1057: return $result;
1058: }
1059:
1060: sub storefile {
1061: my ($file,$contents)=@_;
1062: if (my $fh=Apache::File->new('>'.$file)) {
1063: print $fh $contents;
1064: $fh->close();
1065: } else {
1066: &warning("Unable to save file $file");
1067: }
1068: }
1069:
1070: sub createnewhtml {
1071: my $filecontents=(<<SIMPLECONTENT);
1072: <html>
1073: <head>
1074: <title>
1075: Title of Document Goes Here
1076: </title>
1077: </head>
1078: <body bgcolor="#FFFFFF">
1079:
1080: Body of Document Goes Here
1081:
1082: </body>
1083: </html>
1084: SIMPLECONTENT
1085: return $filecontents;
1086: }
1087:
1088:
1089: sub inserteditinfo {
1090: my ($result,$filecontents)=@_;
1091: $filecontents = &HTML::Entities::encode($filecontents);
1092: # my $editheader='<a href="#editsection">Edit below</a><hr />';
1093: my $editfooter=(<<ENDFOOTER);
1094: <hr />
1095: <a name="editsection" />
1096: <form method="post">
1097: <textarea cols="80" rows="40" name="filecont">$filecontents</textarea>
1098: <br />
1099: <input type="hidden" name="showmode" value="Edit" />
1100: <input type="submit" name="attemptclean"
1101: value="Save and then attempt to clean HTML" />
1102: <input type="submit" name="savethisfile" value="Save this" />
1103: <input type="submit" name="showmode" value="View" />
1104: </form>
1105: ENDFOOTER
1106: # $result=~s/(\<body[^\>]*\>)/$1$editheader/is;
1107: $result=~s/(\<\/body\>)/$editfooter/is;
1108: return $result;
1109: }
1110:
1111: sub get_target {
1112: my $viewgrades=&Apache::lonnet::allowed('vgr',$ENV{'request.course.id'});
1113: if ( $ENV{'request.state'} eq 'published') {
1114: if ( defined($ENV{'form.grade_target'})
1115: && ($viewgrades == 'F' )) {
1116: return ($ENV{'form.grade_target'});
1117: } elsif (defined($ENV{'form.grade_target'})) {
1118: if (($ENV{'form.grade_target'} eq 'web') ||
1119: ($ENV{'form.grade_target'} eq 'tex') ) {
1120: return $ENV{'form.grade_target'}
1121: } else {
1122: return 'web';
1123: }
1124: } else {
1125: return 'web';
1126: }
1127: } elsif ($ENV{'request.state'} eq 'construct') {
1128: if ( defined($ENV{'form.grade_target'})) {
1129: return ($ENV{'form.grade_target'});
1130: } else {
1131: return 'web';
1132: }
1133: } else {
1134: return 'web';
1135: }
1136: }
1137:
1138: sub handler {
1139: my $request=shift;
1140:
1141: my $target=&get_target();
1142:
1143: $Apache::lonxml::debug=0;
1144:
1145: if ($ENV{'browser.mathml'}) {
1146: $request->content_type('text/xml');
1147: } else {
1148: $request->content_type('text/html');
1149: }
1150: &Apache::loncommon::no_cache($request);
1151: $request->send_http_header;
1152:
1153: return OK if $request->header_only;
1154:
1155:
1156: my $file=&Apache::lonnet::filelocation("",$request->uri);
1157: #
1158: # Edit action? Save file.
1159: #
1160: unless ($ENV{'request.state'} eq 'published') {
1161: if (($ENV{'form.savethisfile'}) || ($ENV{'form.attemptclean'})) {
1162: &storefile($file,$ENV{'form.filecont'});
1163: }
1164: }
1165: my %mystyle;
1166: my $result = '';
1167: my $filecontents=&Apache::lonnet::getfile($file);
1168: if ($filecontents == -1) {
1169: $result=(<<ENDNOTFOUND);
1170: <html>
1171: <head>
1172: <title>File not found</title>
1173: </head>
1174: <body bgcolor="#FFFFFF">
1175: <b>File not found: $file</b>
1176: </body>
1177: </html>
1178: ENDNOTFOUND
1179: $filecontents='';
1180: if ($ENV{'request.state'} ne 'published') {
1181: $filecontents=&createnewhtml();
1182: $ENV{'form.showmode'}='Edit'; #force edit mode
1183: }
1184: } else {
1185: unless ($ENV{'request.state'} eq 'published') {
1186: if ($ENV{'form.attemptclean'}) {
1187: $filecontents=&htmlclean($filecontents,1);
1188: }
1189: }
1190: if ($ENV{'form.showmode'} ne 'Edit') {
1191: $result = &Apache::lonxml::xmlparse($target,$filecontents,'',%mystyle);
1192: }
1193: }
1194:
1195: #
1196: # Edit action? Insert editing commands
1197: #
1198: unless ($ENV{'request.state'} eq 'published') {
1199: if ($ENV{'form.showmode'} eq 'Edit') {
1200: $result='<html><body bgcolor="#FFFFFF"></body></html>';
1201: $result=&inserteditinfo($result,$filecontents);
1202: }
1203: }
1204:
1205: writeallows($request->uri);
1206:
1207: $request->print($result);
1208:
1209: return OK;
1210: }
1211:
1212: sub debug {
1213: if ($Apache::lonxml::debug eq 1) {
1214: $|=1;
1215: print("DEBUG:".join('<br />',@_)."<br />\n");
1216: }
1217: }
1218:
1219: sub error {
1220: if (($Apache::lonxml::debug eq 1) || ($ENV{'request.state'} eq 'construct') ) {
1221: print "<b>ERROR:</b>".join('<br />',@_)."<br />\n";
1222: } else {
1223: print "<b>An Error occured while processing this resource. The instructor has been notified.</b> <br />";
1224: #notify author
1225: &Apache::lonmsg::author_res_msg($ENV{'request.filename'},join('<br />',@_));
1226: #notify course
1227: if ( $ENV{'request.course.id'} ) {
1228: my $users=$ENV{'course.'.$ENV{'request.course.id'}.'.comment.email'};
1229: my $declutter=&Apache::lonnet::declutter($ENV{'request.filename'});
1230: foreach my $user (split /\,/, $users) {
1231: ($user,my $domain) = split /:/, $user;
1232: &Apache::lonmsg::user_normal_msg($user,$domain,
1233: "Error [$declutter]",join('<br />',@_));
1234: }
1235: }
1236:
1237: #FIXME probably shouldn't have me get everything forever.
1238: &Apache::lonmsg::user_normal_msg('albertel','msu',"Error in $ENV{'request.filename'}",join('<br />',@_));
1239: #&Apache::lonmsg::user_normal_msg('albertel','103',"Error in $ENV{'request.filename'}",$_[0]);
1240: }
1241: }
1242:
1243: sub warning {
1244: if ($ENV{'request.state'} eq 'construct') {
1245: print "<b>W</b>ARNING<b>:</b>".join('<br />',@_)."<br />\n";
1246: }
1247: }
1248:
1249: sub get_param {
1250: my ($param,$parstack,$safeeval,$context) = @_;
1251: if ( ! $context ) { $context = -1; }
1252: my $args ='';
1253: if ( $#$parstack > (-2-$context) ) { $args=$$parstack[$context]; }
1254: if ( ! $args ) { return undef; }
1255: if ( $args =~ /my \$$param=\"/ ) {
1256: return &Apache::run::run("{$args;".'return $'.$param.'}',$safeeval); #'
1257: } else {
1258: return undef;
1259: }
1260: }
1261:
1262: sub get_param_var {
1263: my ($param,$parstack,$safeeval,$context) = @_;
1264: if ( ! $context ) { $context = -1; }
1265: my $args ='';
1266: if ( $#$parstack > (-2-$context) ) { $args=$$parstack[$context]; }
1267: if ( $args !~ /my \$$param=\"/ ) { return undef; }
1268: my $value=&Apache::run::run("{$args;".'return $'.$param.'}',$safeeval); #'
1269: if ($value =~ /^[\$\@\%]/) {
1270: return &Apache::run::run("return $value",$safeeval,1);
1271: } else {
1272: return $value;
1273: }
1274: }
1275:
1276: sub register_insert {
1277: my @data = split /\n/, &Apache::lonnet::getfile('/home/httpd/lonTabs/insertlist.tab');
1278: my $i;
1279: my $tagnum=0;
1280: my @order;
1281: for ($i=0;$i < $#data; $i++) {
1282: my $line = $data[$i];
1283: if ( $line =~ /^\#/ || $line =~ /^\s*\n/) { next; }
1284: if ( $line =~ /TABLE/ ) { last; }
1285: my ($tag,$descrip,$color,$function,$show) = split(/,/, $line);
1286: if ($tag) {
1287: $insertlist{"$tagnum.tag"} = $tag;
1288: $insertlist{"$tagnum.description"} = $descrip;
1289: $insertlist{"$tagnum.color"} = $color;
1290: $insertlist{"$tagnum.function"} = $function;
1291: if (!defined($show)) { $show='yes'; }
1292: $insertlist{"$tagnum.show"}= $show;
1293: $insertlist{"$tag.num"}=$tagnum;
1294: $tagnum++;
1295: }
1296: }
1297: $i++; #skipping TABLE line
1298: $tagnum = 0;
1299: for (;$i < $#data;$i++) {
1300: my $line = $data[$i];
1301: my ($mnemonic,@which) = split(/ +/,$line);
1302: my $tag = $insertlist{"$tagnum.tag"};
1303: for (my $j=0;$j <=$#which;$j++) {
1304: if ( $which[$j] eq 'Y' ) {
1305: if ($insertlist{"$j.show"} ne 'no') {
1306: push(@{ $insertlist{"$tag.which"} },$j);
1307: }
1308: }
1309: }
1310: $tagnum++;
1311: }
1312: }
1313:
1314: sub description {
1315: my ($token)=@_;
1316: my $tagnum;
1317: my $tag=$token->[1];
1318: foreach my $namespace (reverse @Apache::lonxml::namespace) {
1319: my $testtag=$namespace.'::'.$tag;
1320: $tagnum=$insertlist{"$testtag.num"};
1321: if (defined($tagnum)) { last; }
1322: }
1323: if (!defined ($tagnum)) { $tagnum=$Apache::lonxml::insertlist{"$tag.num"}; }
1324: return $insertlist{$tagnum.'.description'};
1325: }
1326:
1327: # ----------------------------------------------------------------- whichuser
1328: # returns a list of $symb, $courseid, $domain, $name that is correct for
1329: # calls to lonnet functions for this setup.
1330: # - looks for form.grade_ parameters
1331: sub whichuser {
1332: my ($symb,$courseid,$domain,$name);
1333: if (defined($ENV{'form.grade_symb'})) {
1334: my $tmp_courseid=$ENV{'form.grade_courseid'};
1335: my $allowed=&Apache::lonnet::allowed('mgr',$tmp_courseid);
1336: if ($allowed) {
1337: $symb=$ENV{'form.grade_symb'};
1338: $courseid=$ENV{'form.grade_courseid'};
1339: $domain=$ENV{'form.grade_domain'};
1340: $name=$ENV{'form.grade_username'};
1341: }
1342: } else {
1343: $symb=&Apache::lonnet::symbread();
1344: $courseid=$ENV{'request.course.id'};
1345: $domain=$ENV{'user.domain'};
1346: $name=$ENV{'user.name'};
1347: }
1348: return ($symb,$courseid,$domain,$name);
1349: }
1350:
1351: 1;
1352: __END__
1353:
1354:
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