1: # The LearningOnline Network with CAPA
2: # XML Parser Module
3: #
4: # $Id: lonxml.pm,v 1.160 2002/03/21 22:10:31 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: ($ENV{'REQUEST_URI'} eq '/res/adm/pages/menu.html')) {
324: return
325: '<script>function LONCAPAreg(){} function LONCAPAstale(){}</script>';
326: }
327: if ($Apache::lonxml::registered && !$forcereg) { return ''; }
328: $Apache::lonxml::registered=1;
329: my $nothing='';
330: if ($ENV{'browser.type'} eq 'explorer') { $nothing='javascript:void(0);'; }
331: if (($ENV{'REQUEST_URI'}!~/^\/(res\/)*adm\//) || ($forcereg)) {
332: my $hwkadd='';
333: if ($ENV{'REQUEST_URI'}=~/\.(problem|exam|quiz|assess|survey|form)$/) {
334: if (&Apache::lonnet::allowed('vgr',$ENV{'request.course.id'})) {
335: $hwkadd.=(<<ENDSUBM);
336: menu.switchbutton
337: (7,1,'subm.gif','view sub','missions',
338: 'gocmd("/adm/grades","submission")');
339: ENDSUBM
340: }
341: if (&Apache::lonnet::allowed('mgr',$ENV{'request.course.id'})) {
342: $hwkadd.=(<<ENDGRDS);
343: menu.switchbutton
344: (7,2,'pgrd.gif','problem','grades',
345: 'gocmd("/adm/grades","viewgrades")');
346: ENDGRDS
347: }
348: if (&Apache::lonnet::allowed('opa',$ENV{'request.course.id'})) {
349: $hwkadd.=(<<ENDPARM);
350: menu.switchbutton
351: (7,3,'pparm.gif','problem','parms',
352: 'gocmd("/adm/parmset","set")');
353: ENDPARM
354: }
355: }
356: $result = (<<ENDREGTHIS);
357:
358: <script language="JavaScript">
359: // BEGIN LON-CAPA Internal
360:
361: function LONCAPAreg() {
362: menu=window.open("$nothing","LONCAPAmenu","",false);
363: menu.clearTimeout(menu.menucltim);
364: menu.currentURL=window.location.pathname;
365: menu.currentStale=0;
366: menu.clearbut(3,1);
367: menu.switchbutton
368: (6,3,'catalog.gif','catalog','info','catalog_info()');
369: menu.switchbutton
370: (8,1,'eval.gif','evaluate','this','gopost("/adm/evaluate",currentURL)');
371: menu.switchbutton
372: (8,2,'fdbk.gif','feedback','on this','gopost("/adm/feedback",currentURL)');
373: menu.switchbutton
374: (8,3,'prt.gif','prepare','printout','gopost("/adm/printout",currentURL)');
375: menu.switchbutton
376: (2,1,'back.gif','backward','','gopost("/adm/flip","back:"+currentURL)');
377: menu.switchbutton
378: (2,3,'forw.gif','forward','','gopost("/adm/flip","forward:"+currentURL)');
379: menu.switchbutton
380: (9,1,'sbkm.gif','set','bookmark','set_bookmark()');
381: menu.switchbutton
382: (9,2,'vbkm.gif','view','bookmark','edit_bookmarks()');
383: menu.switchbutton
384: (9,3,'anot.gif','anno-','tations','annotate()');
385: $hwkadd
386: }
387:
388: function LONCAPAstale() {
389: menu=window.open("$nothing","LONCAPAmenu","",false);
390: menu.currentStale=1;
391: menu.switchbutton
392: (3,1,'reload.gif','return','location','go(currentURL)');
393: menu.clearbut(7,1);
394: menu.clearbut(7,2);
395: menu.clearbut(7,3);
396: menu.menucltim=menu.setTimeout(
397: 'clearbut(2,1);clearbut(2,3);clearbut(8,1);clearbut(8,2);clearbut(8,3);'+
398: 'clearbut(9,1);clearbut(9,2);clearbut(9,3);clearbut(6,3)',
399: 2000);
400:
401: }
402:
403: // END LON-CAPA Internal
404: </script>
405: ENDREGTHIS
406:
407: } else {
408: $result = (<<ENDDONOTREGTHIS);
409:
410: <script language="JavaScript">
411: // BEGIN LON-CAPA Internal
412:
413: function LONCAPAreg() {
414: menu=window.open("$nothing","LONCAPAmenu","",false);
415: menu.currentStale=1;
416: menu.clearbut(2,1);
417: menu.clearbut(2,3);
418: menu.clearbut(8,1);
419: menu.clearbut(8,2);
420: menu.clearbut(8,3);
421: if (menu.currentURL) {
422: menu.switchbutton
423: (3,1,'reload.gif','return','location','go(currentURL)');
424: } else {
425: menu.clearbut(3,1);
426: }
427: }
428:
429: function LONCAPAstale() {
430: }
431:
432: // END LON-CAPA Internal
433: </script>
434: ENDDONOTREGTHIS
435: }
436: if ($target eq 'edit') {
437: # Javascript routines for construction space:
438: # openbrowser and opensearcher will start the file browser
439: # (lonindexer) and searcher (lonsearchcat) respectively.
440: # Inputs are the name of the html form being used
441: # and the name of the element the selected URL should
442: # be placed in.
443: $result .=<<"ENDBROWSERSCRIPT";
444: <script>
445: var editbrowser;
446: function openbrowser(formname,elementname) {
447: var url = '/res/?';
448: if (editbrowser == null) {
449: url += 'launch=1&';
450: }
451: url += 'catalogmode=interactive&';
452: url += 'mode=edit&';
453: url += 'form=' + formname + '&';
454: url += 'element=' + elementname + '';
455: var title = 'Browser';
456: var options = 'scrollbars=1,resizable=1,menubar=0';
457: options += ',width=700,height=600';
458: editbrowser = open(url,title,options,'1');
459: editbrowser.focus();
460: }
461: var editsearcher;
462: function opensearcher(formname,elementname) {
463: var url = '/adm/searchcat?';
464: if (editsearcher == null) {
465: url += 'launch=1&';
466: }
467: url += 'catalogmode=interactive&';
468: url += 'mode=edit&';
469: url += 'form=' + formname + '&';
470: url += 'element=' + elementname + '';
471: var title = 'Search';
472: var options = 'scrollbars=1,resizable=1,menubar=0';
473: options += ',width=700,height=600';
474: editsearcher = open(url,title,options,'1');
475: editsearcher.focus();
476: }
477: </script>
478: ENDBROWSERSCRIPT
479: }
480: return $result;
481: }
482:
483: sub loadevents() {
484: return 'LONCAPAreg();';
485: }
486:
487: sub unloadevents() {
488: return 'LONCAPAstale();';
489: }
490:
491: sub printalltags {
492: my $temp;
493: foreach $temp (sort keys %Apache::lonxml::alltags) {
494: &Apache::lonxml::debug("$temp -- ".
495: join(',',@{ $Apache::lonxml::alltags{$temp} }));
496: }
497: }
498:
499: sub xmlparse {
500: my ($target,$content_file_string,$safeinit,%style_for_target) = @_;
501:
502: &setup_globals($target);
503: #&printalltags();
504: my @pars = ();
505: my $pwd=$ENV{'request.filename'};
506: $pwd =~ s:/[^/]*$::;
507: &newparser(\@pars,\$content_file_string,$pwd);
508:
509: my $safeeval = new Safe;
510: my $safehole = new Safe::Hole;
511: &init_safespace($target,$safeeval,$safehole,$safeinit);
512: #-------------------- Redefinition of the target in the case of compound target
513:
514: ($target, my @tenta) = split('&&',$target);
515:
516: my @stack = ();
517: my @parstack = ();
518: &initdepth;
519:
520: my $finaloutput = &inner_xmlparse($target,\@stack,\@parstack,\@pars,
521: $safeeval,\%style_for_target);
522: if ($ENV{'request.uri'}) {
523: &writeallows($ENV{'request.uri'});
524: }
525: return $finaloutput;
526: }
527:
528: sub htmlclean {
529: my ($raw,$full)=@_;
530:
531: my $tree = HTML::TreeBuilder->new;
532: $tree->ignore_unknown(0);
533:
534: $tree->parse($raw);
535:
536: my $output= $tree->as_HTML(undef,' ');
537:
538: $output=~s/\<(br|hr|img|meta|allow)([^\>\/]*)\>/\<$1$2 \/\>/gis;
539: $output=~s/\<\/(br|hr|img|meta|allow)\>//gis;
540: unless ($full) {
541: $output=~s/\<[\/]*(body|head|html)\>//gis;
542: }
543:
544: $tree = $tree->delete;
545:
546: return $output;
547: }
548:
549: sub inner_xmlparse {
550: my ($target,$stack,$parstack,$pars,$safeeval,$style_for_target)=@_;
551: my $finaloutput = '';
552: my $result;
553: my $token;
554: while ( $#$pars > -1 ) {
555: while ($token = $$pars['-1']->get_token) {
556: if (($token->[0] eq 'T') || ($token->[0] eq 'C') || ($token->[0] eq 'D') ) {
557: if ($metamode<1) {
558: $result=$token->[1];
559: }
560: } elsif ($token->[0] eq 'PI') {
561: if ($metamode<1) {
562: $result=$token->[2];
563: }
564: } elsif ($token->[0] eq 'S') {
565: # add tag to stack
566: push (@$stack,$token->[1]);
567: # add parameters list to another stack
568: push (@$parstack,&parstring($token));
569: &increasedepth($token);
570: if (exists $$style_for_target{$token->[1]}) {
571: if ($Apache::lonxml::redirection) {
572: $Apache::lonxml::outputstack['-1'] .=
573: &recurse($$style_for_target{$token->[1]},$target,$safeeval,
574: $style_for_target,@$parstack);
575: } else {
576: $finaloutput .= &recurse($$style_for_target{$token->[1]},$target,
577: $safeeval,$style_for_target,@$parstack);
578: }
579: } else {
580: $result = &callsub("start_$token->[1]", $target, $token, $stack,
581: $parstack, $pars, $safeeval, $style_for_target);
582: }
583: } elsif ($token->[0] eq 'E') {
584: #clear out any tags that didn't end
585: while ($token->[1] ne $$stack['-1'] && ($#$stack > -1)) {
586: my $lasttag=$$stack[-1];
587: if ($token->[1] =~ /^$lasttag$/i) {
588: &Apache::lonxml::warning('Using tag </'.$token->[1].'> as end tag to <'.$$stack[-1].'>');
589: last;
590: } else {
591: &Apache::lonxml::warning('Found tag </'.$token->[1].'> when looking for </'.$$stack[-1].'> in file');
592: &end_tag($stack,$parstack,$token);
593: }
594: }
595:
596: if (exists($$style_for_target{'/'."$token->[1]"})) {
597: if ($Apache::lonxml::redirection) {
598: $Apache::lonxml::outputstack['-1'] .=
599: &recurse($$style_for_target{'/'."$token->[1]"},
600: $target,$safeeval,$style_for_target,@$parstack);
601: } else {
602: $finaloutput .= &recurse($$style_for_target{'/'."$token->[1]"},
603: $target,$safeeval,$style_for_target,
604: @$parstack);
605: }
606: } else {
607: $result = &callsub("end_$token->[1]", $target, $token, $stack,
608: $parstack, $pars,$safeeval, $style_for_target);
609: }
610: } else {
611: &Apache::lonxml::error("Unknown token event :$token->[0]:$token->[1]:");
612: }
613: #evaluate variable refs in result
614: if ($result ne "") {
615: if ( $#$parstack > -1 ) {
616: if ($Apache::lonxml::redirection) {
617: $Apache::lonxml::outputstack['-1'] .=
618: &Apache::run::evaluate($result,$safeeval,$$parstack['-1']);
619: } else {
620: $finaloutput .= &Apache::run::evaluate($result,$safeeval,
621: $$parstack['-1']);
622: }
623: } else {
624: $finaloutput .= &Apache::run::evaluate($result,$safeeval,'');
625: }
626: $result = '';
627: }
628: if ($token->[0] eq 'E') {
629: &end_tag($stack,$parstack,$token);
630: }
631: }
632: pop @$pars;
633: pop @Apache::lonxml::pwd;
634: }
635:
636: # if ($target eq 'meta') {
637: # $finaloutput.=&endredirection;
638: # }
639:
640: if (($ENV{'QUERY_STRING'}) && ($target eq 'web')) {
641: $finaloutput=&afterburn($finaloutput);
642: }
643: return $finaloutput;
644: }
645:
646: sub recurse {
647: my @innerstack = ();
648: my @innerparstack = ();
649: my ($newarg,$target,$safeeval,$style_for_target,@parstack) = @_;
650: my @pat = ();
651: &newparser(\@pat,\$newarg);
652: my $tokenpat;
653: my $partstring = '';
654: my $output='';
655: my $decls='';
656: &Apache::lonxml::debug("Recursing");
657: while ( $#pat > -1 ) {
658: while ($tokenpat = $pat[$#pat]->get_token) {
659: if (($tokenpat->[0] eq 'T') || ($tokenpat->[0] eq 'C') || ($tokenpat->[0] eq 'D') ) {
660: if ($metamode<1) { $partstring=$tokenpat->[1]; }
661: } elsif ($tokenpat->[0] eq 'PI') {
662: if ($metamode<1) { $partstring=$tokenpat->[2]; }
663: } elsif ($tokenpat->[0] eq 'S') {
664: push (@innerstack,$tokenpat->[1]);
665: push (@innerparstack,&parstring($tokenpat));
666: &increasedepth($tokenpat);
667: $partstring = &callsub("start_$tokenpat->[1]", $target, $tokenpat,
668: \@innerstack, \@innerparstack, \@pat,
669: $safeeval, $style_for_target);
670: } elsif ($tokenpat->[0] eq 'E') {
671: #clear out any tags that didn't end
672: while ($tokenpat->[1] ne $innerstack[$#innerstack]
673: && ($#innerstack > -1)) {
674: my $lasttag=$innerstack[-1];
675: if ($tokenpat->[1] =~ /^$lasttag$/i) {
676: &Apache::lonxml::warning('Using tag </'.$tokenpat->[1].'> as end tag to <'.$innerstack[-1].'>');
677: last;
678: } else {
679: &Apache::lonxml::warning('Found tag </'.$tokenpat->[1].'> when looking for </'.$innerstack[-1].'> in file');
680: &end_tag(\@innerstack,\@innerparstack,$tokenpat);
681: }
682: }
683: $partstring = &callsub("end_$tokenpat->[1]", $target, $tokenpat,
684: \@innerstack, \@innerparstack, \@pat,
685: $safeeval, $style_for_target);
686: } else {
687: &Apache::lonxml::error("Unknown token event :$tokenpat->[0]:$tokenpat->[1]:");
688: }
689: #pass both the variable to the style tag, and the tag we
690: #are processing inside the <definedtag>
691: if ( $partstring ne "" ) {
692: if ( $#parstack > -1 ) {
693: if ( $#innerparstack > -1 ) {
694: $decls= $parstack[$#parstack].$innerparstack[$#innerparstack];
695: } else {
696: $decls= $parstack[$#parstack];
697: }
698: } else {
699: if ( $#innerparstack > -1 ) {
700: $decls=$innerparstack[$#innerparstack];
701: } else {
702: $decls='';
703: }
704: }
705: $output .= &Apache::run::evaluate($partstring,$safeeval,$decls);
706: $partstring = '';
707: }
708: if ($tokenpat->[0] eq 'E') { pop @innerstack;pop @innerparstack;
709: &decreasedepth($tokenpat);}
710: }
711: pop @pat;
712: pop @Apache::lonxml::pwd;
713: }
714: &Apache::lonxml::debug("Exiting Recursing");
715: return $output;
716: }
717:
718: sub callsub {
719: my ($sub,$target,$token,$tagstack,$parstack,$parser,$safeeval,$style)=@_;
720: my $currentstring='';
721: my $nodefault;
722: {
723: my $sub1;
724: no strict 'refs';
725: my $tag=$token->[1];
726: my $space=$Apache::lonxml::alltags{$tag}[-1];
727: if (!$space) {
728: $tag=~tr/A-Z/a-z/;
729: $sub=~tr/A-Z/a-z/;
730: $space=$Apache::lonxml::alltags{$tag}[-1]
731: }
732:
733: my $deleted=0;
734: $Apache::lonxml::curdepth=join('_',@Apache::lonxml::depthcounter);
735: if (($token->[0] eq 'S') && ($target eq 'modified')) {
736: $deleted=&Apache::edit::handle_delete($space,$target,$token,$tagstack,
737: $parstack,$parser,$safeeval,
738: $style);
739: }
740: if (!$deleted) {
741: if ($space) {
742: #&Apache::lonxml::debug("Calling sub $sub in $space $metamode");
743: $sub1="$space\:\:$sub";
744: ($currentstring,$nodefault) = &$sub1($target,$token,$tagstack,
745: $parstack,$parser,$safeeval,
746: $style);
747: } else {
748: #&Apache::lonxml::debug("NOT Calling sub $sub in $space $metamode");
749: if ($metamode <1) {
750: if (defined($token->[4]) && ($metamode < 1)) {
751: $currentstring = $token->[4];
752: } else {
753: $currentstring = $token->[2];
754: }
755: }
756: }
757: # &Apache::lonxml::debug("nodefalt:$nodefault:");
758: if ($currentstring eq '' && $nodefault eq '') {
759: if ($target eq 'edit') {
760: &Apache::lonxml::debug("doing default edit for $token->[1]");
761: if ($token->[0] eq 'S') {
762: $currentstring = &Apache::edit::tag_start($target,$token);
763: } elsif ($token->[0] eq 'E') {
764: $currentstring = &Apache::edit::tag_end($target,$token);
765: }
766: } elsif ($target eq 'modified') {
767: if ($token->[0] eq 'S') {
768: $currentstring = $token->[4];
769: $currentstring.=&Apache::edit::handle_insert();
770: } else {
771: $currentstring = $token->[2];
772: }
773: }
774: }
775: }
776: use strict 'refs';
777: }
778: return $currentstring;
779: }
780:
781: sub setup_globals {
782: my ($target)=@_;
783: $Apache::lonxml::registered = 0;
784: @Apache::lonxml::pwd=();
785: @Apache::lonxml::extlinks=();
786: if ($target eq 'meta') {
787: $Apache::lonxml::redirection = 0;
788: $Apache::lonxml::metamode = 1;
789: $Apache::lonxml::evaluate = 1;
790: $Apache::lonxml::import = 0;
791: } elsif ($target eq 'answer') {
792: $Apache::lonxml::redirection = 0;
793: $Apache::lonxml::metamode = 1;
794: $Apache::lonxml::evaluate = 1;
795: $Apache::lonxml::import = 1;
796: } elsif ($target eq 'grade') {
797: &startredirection;
798: $Apache::lonxml::metamode = 0;
799: $Apache::lonxml::evaluate = 1;
800: $Apache::lonxml::import = 1;
801: } elsif ($target eq 'modified') {
802: $Apache::lonxml::redirection = 0;
803: $Apache::lonxml::metamode = 0;
804: $Apache::lonxml::evaluate = 0;
805: $Apache::lonxml::import = 0;
806: } elsif ($target eq 'edit') {
807: $Apache::lonxml::redirection = 0;
808: $Apache::lonxml::metamode = 0;
809: $Apache::lonxml::evaluate = 0;
810: $Apache::lonxml::import = 0;
811: } else {
812: $Apache::lonxml::redirection = 0;
813: $Apache::lonxml::metamode = 0;
814: $Apache::lonxml::evaluate = 1;
815: $Apache::lonxml::import = 1;
816: }
817: }
818:
819: sub init_safespace {
820: my ($target,$safeeval,$safehole,$safeinit) = @_;
821: $safeeval->permit("entereval");
822: $safeeval->permit(":base_math");
823: $safeeval->permit("sort");
824: $safeeval->deny(":base_io");
825: $safehole->wrap(\&Apache::scripttag::xmlparse,$safeeval,'&xmlparse');
826: $safehole->wrap(\&Apache::lonnet::EXT,$safeeval,'&EXT');
827:
828: $safehole->wrap(\&Math::Cephes::asin,$safeeval,'&asin');
829: $safehole->wrap(\&Math::Cephes::acos,$safeeval,'&acos');
830: $safehole->wrap(\&Math::Cephes::atan,$safeeval,'&atan');
831: $safehole->wrap(\&Math::Cephes::sinh,$safeeval,'&sinh');
832: $safehole->wrap(\&Math::Cephes::cosh,$safeeval,'&cosh');
833: $safehole->wrap(\&Math::Cephes::tanh,$safeeval,'&tanh');
834: $safehole->wrap(\&Math::Cephes::asinh,$safeeval,'&asinh');
835: $safehole->wrap(\&Math::Cephes::acosh,$safeeval,'&acosh');
836: $safehole->wrap(\&Math::Cephes::atanh,$safeeval,'&atanh');
837: $safehole->wrap(\&Math::Cephes::erf,$safeeval,'&erf');
838: $safehole->wrap(\&Math::Cephes::erfc,$safeeval,'&erfc');
839: $safehole->wrap(\&Math::Cephes::j0,$safeeval,'&j0');
840: $safehole->wrap(\&Math::Cephes::j1,$safeeval,'&j1');
841: $safehole->wrap(\&Math::Cephes::jn,$safeeval,'&jn');
842: $safehole->wrap(\&Math::Cephes::jv,$safeeval,'&jv');
843: $safehole->wrap(\&Math::Cephes::y0,$safeeval,'&y0');
844: $safehole->wrap(\&Math::Cephes::y1,$safeeval,'&y1');
845: $safehole->wrap(\&Math::Cephes::yn,$safeeval,'&yn');
846: $safehole->wrap(\&Math::Cephes::yv,$safeeval,'&yv');
847: $safehole->wrap(\&Math::Random::random_beta,$safeeval,'&math_random_beta');
848: $safehole->wrap(\&Math::Random::random_chi_square,$safeeval,'&math_random_chi_square');
849: $safehole->wrap(\&Math::Random::random_exponential,$safeeval,'&math_random_exponential');
850: $safehole->wrap(\&Math::Random::random_f,$safeeval,'&math_random_f');
851: $safehole->wrap(\&Math::Random::random_gamma,$safeeval,'&math_random_gamma');
852: $safehole->wrap(\&Math::Random::random_multivariate_normal,$safeeval,'&math_random_multivariate_normal');
853: $safehole->wrap(\&Math::Random::random_multinomial,$safeeval,'&math_random_multinomial');
854: $safehole->wrap(\&Math::Random::random_noncentral_chi_square,$safeeval,'&math_random_noncentral_chi_square');
855: $safehole->wrap(\&Math::Random::random_noncentral_f,$safeeval,'&math_random_noncentral_f');
856: $safehole->wrap(\&Math::Random::random_normal,$safeeval,'&math_random_normal');
857: $safehole->wrap(\&Math::Random::random_permutation,$safeeval,'&math_random_permutation');
858: $safehole->wrap(\&Math::Random::random_permuted_index,$safeeval,'&math_random_permuted_index');
859: $safehole->wrap(\&Math::Random::random_uniform,$safeeval,'&math_random_uniform');
860: $safehole->wrap(\&Math::Random::random_poisson,$safeeval,'&math_random_poisson');
861: $safehole->wrap(\&Math::Random::random_uniform_integer,$safeeval,'&math_random_uniform_integer');
862: $safehole->wrap(\&Math::Random::random_negative_binomial,$safeeval,'&math_random_negative_binomial');
863: $safehole->wrap(\&Math::Random::random_binomial,$safeeval,'&math_random_binomial');
864: $safehole->wrap(\&Math::Random::random_seed_from_phrase,$safeeval,'&random_seed_from_phrase');
865: $safehole->wrap(\&Math::Random::random_set_seed_from_phrase,$safeeval,'&random_set_seed_from_phrase');
866: $safehole->wrap(\&Math::Random::random_get_seed,$safeeval,'&random_get_seed');
867: $safehole->wrap(\&Math::Random::random_set_seed,$safeeval,'&random_set_seed');
868:
869: #need to inspect this class of ops
870: # $safeeval->deny(":base_orig");
871: $safeinit .= ';$external::target="'.$target.'";';
872: my $rndseed;
873: my ($symb,$courseid,$domain,$name) = &Apache::lonxml::whichuser();
874: $rndseed=&Apache::lonnet::rndseed($symb,$courseid,$domain,$name);
875: $safeinit .= ';$external::randomseed='.$rndseed.';';
876: &Apache::run::run($safeinit,$safeeval);
877: }
878:
879: sub startredirection {
880: $Apache::lonxml::redirection++;
881: push (@Apache::lonxml::outputstack, '');
882: }
883:
884: sub endredirection {
885: if (!$Apache::lonxml::redirection) {
886: &Apache::lonxml::error("Endredirection was called, before a startredirection, perhaps you have unbalanced tags. Some debuging information:".join ":",caller);
887: return '';
888: }
889: $Apache::lonxml::redirection--;
890: pop @Apache::lonxml::outputstack;
891: }
892:
893: sub end_tag {
894: my ($tagstack,$parstack,$token)=@_;
895: pop(@$tagstack);
896: pop(@$parstack);
897: &decreasedepth($token);
898: }
899:
900: sub initdepth {
901: @Apache::lonxml::depthcounter=();
902: $Apache::lonxml::depth=-1;
903: $Apache::lonxml::olddepth=-1;
904: }
905:
906: sub increasedepth {
907: my ($token) = @_;
908: $Apache::lonxml::depth++;
909: $Apache::lonxml::depthcounter[$Apache::lonxml::depth]++;
910: if ($Apache::lonxml::depthcounter[$Apache::lonxml::depth]==1) {
911: $Apache::lonxml::olddepth=$Apache::lonxml::depth;
912: }
913: my $curdepth=join('_',@Apache::lonxml::depthcounter);
914: &Apache::lonxml::debug("s $Apache::lonxml::depth : $Apache::lonxml::olddepth : $curdepth : $token->[1]\n");
915: #print "<br />s $Apache::lonxml::depth : $Apache::lonxml::olddepth : $curdepth : $token->[1]\n";
916: }
917:
918: sub decreasedepth {
919: my ($token) = @_;
920: $Apache::lonxml::depth--;
921: if ($Apache::lonxml::depth<$Apache::lonxml::olddepth-1) {
922: $#Apache::lonxml::depthcounter--;
923: $Apache::lonxml::olddepth=$Apache::lonxml::depth+1;
924: }
925: if ( $Apache::lonxml::depth < -1) {
926: &Apache::lonxml::warning("Missing tags, unable to properly run file.");
927: $Apache::lonxml::depth='-1';
928: }
929: my $curdepth=join('_',@Apache::lonxml::depthcounter);
930: &Apache::lonxml::debug("e $Apache::lonxml::depth : $Apache::lonxml::olddepth : $token->[1] : $curdepth\n");
931: #print "<br />e $Apache::lonxml::depth : $Apache::lonxml::olddepth : $token->[1] : $curdepth\n";
932: }
933:
934: sub get_all_text {
935:
936: my($tag,$pars)= @_;
937: my $depth=0;
938: my $token;
939: my $result='';
940: if ( $tag =~ m:^/: ) {
941: my $tag=substr($tag,1);
942: # &Apache::lonxml::debug("have:$tag:");
943: while (($depth >=0) && ($token = $pars->get_token)) {
944: # &Apache::lonxml::debug("e token:$token->[0]:$depth:$token->[1]");
945: if (($token->[0] eq 'T')||($token->[0] eq 'C')||($token->[0] eq 'D')) {
946: $result.=$token->[1];
947: } elsif ($token->[0] eq 'PI') {
948: $result.=$token->[2];
949: } elsif ($token->[0] eq 'S') {
950: if ($token->[1] =~ /^$tag$/i) { $depth++; }
951: $result.=$token->[4];
952: } elsif ($token->[0] eq 'E') {
953: if ( $token->[1] =~ /^$tag$/i) { $depth--; }
954: #skip sending back the last end tag
955: if ($depth > -1) { $result.=$token->[2]; } else {
956: $pars->unget_token($token);
957: }
958: }
959: }
960: } else {
961: while ($token = $pars->get_token) {
962: # &Apache::lonxml::debug("s token:$token->[0]:$depth:$token->[1]");
963: if (($token->[0] eq 'T')||($token->[0] eq 'C')||($token->[0] eq 'D')) {
964: $result.=$token->[1];
965: } elsif ($token->[0] eq 'PI') {
966: $result.=$token->[2];
967: } elsif ($token->[0] eq 'S') {
968: if ( $token->[1] =~ /^$tag$/i) {
969: $pars->unget_token($token); last;
970: } else {
971: $result.=$token->[4];
972: }
973: } elsif ($token->[0] eq 'E') {
974: $result.=$token->[2];
975: }
976: }
977: }
978: # &Apache::lonxml::debug("Exit:$result:");
979: return $result
980: }
981:
982: sub newparser {
983: my ($parser,$contentref,$dir) = @_;
984: push (@$parser,HTML::TokeParser->new($contentref));
985: $$parser['-1']->xml_mode('1');
986: if ( $dir eq '' ) {
987: push (@Apache::lonxml::pwd, $Apache::lonxml::pwd[$#Apache::lonxml::pwd]);
988: } else {
989: push (@Apache::lonxml::pwd, $dir);
990: }
991: # &Apache::lonxml::debug("pwd:$#Apache::lonxml::pwd");
992: # &Apache::lonxml::debug("pwd:$Apache::lonxml::pwd[$#Apache::lonxml::pwd]");
993: }
994:
995: sub parstring {
996: my ($token) = @_;
997: my $temp='';
998: foreach (@{$token->[3]}) {
999: unless ($_=~/\W/) {
1000: my $val=$token->[2]->{$_};
1001: $val =~ s/([\%\@\\\"])/\\$1/g;
1002: #if ($val =~ m/^[\%\@]/) { $val="\\".$val; }
1003: $temp .= "my \$$_=\"$val\";"
1004: }
1005: }
1006: return $temp;
1007: }
1008:
1009: sub writeallows {
1010: unless ($#extlinks>=0) { return; }
1011: my $thisurl='/res/'.&Apache::lonnet::declutter(shift);
1012: if ($ENV{'httpref.'.$thisurl}) {
1013: $thisurl=$ENV{'httpref.'.$thisurl};
1014: }
1015: my $thisdir=$thisurl;
1016: $thisdir=~s/\/[^\/]+$//;
1017: my %httpref=();
1018: foreach (@extlinks) {
1019: $httpref{'httpref.'.
1020: &Apache::lonnet::hreflocation($thisdir,$_)}=$thisurl;
1021: }
1022: @extlinks=();
1023: &Apache::lonnet::appenv(%httpref);
1024: }
1025:
1026: #
1027: # Afterburner handles anchors, highlights and links
1028: #
1029: sub afterburn {
1030: my $result=shift;
1031: &Apache::loncommon::get_unprocessed_cgi($ENV{'QUERY_STRING'},
1032: ['highlight','anchor','link']);
1033: if ($ENV{'form.highlight'}) {
1034: foreach (split(/\,/,$ENV{'form.highlight'})) {
1035: my $anchorname=$_;
1036: my $matchthis=$anchorname;
1037: $matchthis=~s/\_+/\\s\+/g;
1038: $result=~s/($matchthis)/\<font color=\"red\"\>$1\<\/font\>/gs;
1039: }
1040: }
1041: if ($ENV{'form.link'}) {
1042: foreach (split(/\,/,$ENV{'form.link'})) {
1043: my ($anchorname,$linkurl)=split(/\>/,$_);
1044: my $matchthis=$anchorname;
1045: $matchthis=~s/\_+/\\s\+/g;
1046: $result=~s/($matchthis)/\<a href=\"$linkurl\"\>$1\<\/a\>/gs;
1047: }
1048: }
1049: if ($ENV{'form.anchor'}) {
1050: my $anchorname=$ENV{'form.anchor'};
1051: my $matchthis=$anchorname;
1052: $matchthis=~s/\_+/\\s\+/g;
1053: $result=~s/($matchthis)/\<a name=\"$anchorname\"\>$1\<\/a\>/s;
1054: $result.=(<<"ENDSCRIPT");
1055: <script>
1056: document.location.hash='$anchorname';
1057: </script>
1058: ENDSCRIPT
1059: }
1060: return $result;
1061: }
1062:
1063: sub storefile {
1064: my ($file,$contents)=@_;
1065: if (my $fh=Apache::File->new('>'.$file)) {
1066: print $fh $contents;
1067: $fh->close();
1068: } else {
1069: &warning("Unable to save file $file");
1070: }
1071: }
1072:
1073: sub createnewhtml {
1074: my $filecontents=(<<SIMPLECONTENT);
1075: <html>
1076: <head>
1077: <title>
1078: Title of Document Goes Here
1079: </title>
1080: </head>
1081: <body bgcolor="#FFFFFF">
1082:
1083: Body of Document Goes Here
1084:
1085: </body>
1086: </html>
1087: SIMPLECONTENT
1088: return $filecontents;
1089: }
1090:
1091:
1092: sub inserteditinfo {
1093: my ($result,$filecontents)=@_;
1094: $filecontents = &HTML::Entities::encode($filecontents);
1095: # my $editheader='<a href="#editsection">Edit below</a><hr />';
1096: my $editfooter=(<<ENDFOOTER);
1097: <hr />
1098: <a name="editsection" />
1099: <form method="post">
1100: <textarea cols="80" rows="40" name="filecont">$filecontents</textarea>
1101: <br />
1102: <input type="hidden" name="showmode" value="Edit" />
1103: <input type="submit" name="attemptclean"
1104: value="Save and then attempt to clean HTML" />
1105: <input type="submit" name="savethisfile" value="Save this" />
1106: <input type="submit" name="showmode" value="View" />
1107: </form>
1108: ENDFOOTER
1109: # $result=~s/(\<body[^\>]*\>)/$1$editheader/is;
1110: $result=~s/(\<\/body\>)/$editfooter/is;
1111: return $result;
1112: }
1113:
1114: sub get_target {
1115: my $viewgrades=&Apache::lonnet::allowed('vgr',$ENV{'request.course.id'});
1116: if ( $ENV{'request.state'} eq 'published') {
1117: if ( defined($ENV{'form.grade_target'})
1118: && ($viewgrades == 'F' )) {
1119: return ($ENV{'form.grade_target'});
1120: } elsif (defined($ENV{'form.grade_target'})) {
1121: if (($ENV{'form.grade_target'} eq 'web') ||
1122: ($ENV{'form.grade_target'} eq 'tex') ) {
1123: return $ENV{'form.grade_target'}
1124: } else {
1125: return 'web';
1126: }
1127: } else {
1128: return 'web';
1129: }
1130: } elsif ($ENV{'request.state'} eq 'construct') {
1131: if ( defined($ENV{'form.grade_target'})) {
1132: return ($ENV{'form.grade_target'});
1133: } else {
1134: return 'web';
1135: }
1136: } else {
1137: return 'web';
1138: }
1139: }
1140:
1141: sub handler {
1142: my $request=shift;
1143:
1144: my $target=&get_target();
1145:
1146: $Apache::lonxml::debug=0;
1147:
1148: if ($ENV{'browser.mathml'}) {
1149: $request->content_type('text/xml');
1150: } else {
1151: $request->content_type('text/html');
1152: }
1153: &Apache::loncommon::no_cache($request);
1154: $request->send_http_header;
1155:
1156: return OK if $request->header_only;
1157:
1158:
1159: my $file=&Apache::lonnet::filelocation("",$request->uri);
1160: #
1161: # Edit action? Save file.
1162: #
1163: unless ($ENV{'request.state'} eq 'published') {
1164: if (($ENV{'form.savethisfile'}) || ($ENV{'form.attemptclean'})) {
1165: &storefile($file,$ENV{'form.filecont'});
1166: }
1167: }
1168: my %mystyle;
1169: my $result = '';
1170: my $filecontents=&Apache::lonnet::getfile($file);
1171: if ($filecontents == -1) {
1172: $result=(<<ENDNOTFOUND);
1173: <html>
1174: <head>
1175: <title>File not found</title>
1176: </head>
1177: <body bgcolor="#FFFFFF">
1178: <b>File not found: $file</b>
1179: </body>
1180: </html>
1181: ENDNOTFOUND
1182: $filecontents='';
1183: if ($ENV{'request.state'} ne 'published') {
1184: $filecontents=&createnewhtml();
1185: $ENV{'form.showmode'}='Edit'; #force edit mode
1186: }
1187: } else {
1188: unless ($ENV{'request.state'} eq 'published') {
1189: if ($ENV{'form.attemptclean'}) {
1190: $filecontents=&htmlclean($filecontents,1);
1191: }
1192: }
1193: if ($ENV{'form.showmode'} ne 'Edit') {
1194: $result = &Apache::lonxml::xmlparse($target,$filecontents,'',%mystyle);
1195: }
1196: }
1197:
1198: #
1199: # Edit action? Insert editing commands
1200: #
1201: unless ($ENV{'request.state'} eq 'published') {
1202: if ($ENV{'form.showmode'} eq 'Edit') {
1203: $result='<html><body bgcolor="#FFFFFF"></body></html>';
1204: $result=&inserteditinfo($result,$filecontents);
1205: }
1206: }
1207:
1208: writeallows($request->uri);
1209:
1210: $request->print($result);
1211:
1212: return OK;
1213: }
1214:
1215: sub debug {
1216: if ($Apache::lonxml::debug eq 1) {
1217: $|=1;
1218: print("DEBUG:".join('<br />',@_)."<br />\n");
1219: }
1220: }
1221:
1222: sub error {
1223: if (($Apache::lonxml::debug eq 1) || ($ENV{'request.state'} eq 'construct') ) {
1224: print "<b>ERROR:</b>".join('<br />',@_)."<br />\n";
1225: } else {
1226: print "<b>An Error occured while processing this resource. The instructor has been notified.</b> <br />";
1227: #notify author
1228: &Apache::lonmsg::author_res_msg($ENV{'request.filename'},join('<br />',@_));
1229: #notify course
1230: if ( $ENV{'request.course.id'} ) {
1231: my $users=$ENV{'course.'.$ENV{'request.course.id'}.'.comment.email'};
1232: my $declutter=&Apache::lonnet::declutter($ENV{'request.filename'});
1233: foreach my $user (split /\,/, $users) {
1234: ($user,my $domain) = split /:/, $user;
1235: &Apache::lonmsg::user_normal_msg($user,$domain,
1236: "Error [$declutter]",join('<br />',@_));
1237: }
1238: }
1239:
1240: #FIXME probably shouldn't have me get everything forever.
1241: &Apache::lonmsg::user_normal_msg('albertel','msu',"Error in $ENV{'request.filename'}",join('<br />',@_));
1242: #&Apache::lonmsg::user_normal_msg('albertel','103',"Error in $ENV{'request.filename'}",$_[0]);
1243: }
1244: }
1245:
1246: sub warning {
1247: if ($ENV{'request.state'} eq 'construct') {
1248: print "<b>W</b>ARNING<b>:</b>".join('<br />',@_)."<br />\n";
1249: }
1250: }
1251:
1252: sub get_param {
1253: my ($param,$parstack,$safeeval,$context) = @_;
1254: if ( ! $context ) { $context = -1; }
1255: my $args ='';
1256: if ( $#$parstack > (-2-$context) ) { $args=$$parstack[$context]; }
1257: if ( ! $args ) { return undef; }
1258: if ( $args =~ /my \$$param=\"/ ) {
1259: return &Apache::run::run("{$args;".'return $'.$param.'}',$safeeval); #'
1260: } else {
1261: return undef;
1262: }
1263: }
1264:
1265: sub get_param_var {
1266: my ($param,$parstack,$safeeval,$context) = @_;
1267: if ( ! $context ) { $context = -1; }
1268: my $args ='';
1269: if ( $#$parstack > (-2-$context) ) { $args=$$parstack[$context]; }
1270: if ( $args !~ /my \$$param=\"/ ) { return undef; }
1271: my $value=&Apache::run::run("{$args;".'return $'.$param.'}',$safeeval); #'
1272: if ($value =~ /^[\$\@\%]/) {
1273: return &Apache::run::run("return $value",$safeeval,1);
1274: } else {
1275: return $value;
1276: }
1277: }
1278:
1279: sub register_insert {
1280: my @data = split /\n/, &Apache::lonnet::getfile('/home/httpd/lonTabs/insertlist.tab');
1281: my $i;
1282: my $tagnum=0;
1283: my @order;
1284: for ($i=0;$i < $#data; $i++) {
1285: my $line = $data[$i];
1286: if ( $line =~ /^\#/ || $line =~ /^\s*\n/) { next; }
1287: if ( $line =~ /TABLE/ ) { last; }
1288: my ($tag,$descrip,$color,$function,$show) = split(/,/, $line);
1289: if ($tag) {
1290: $insertlist{"$tagnum.tag"} = $tag;
1291: $insertlist{"$tagnum.description"} = $descrip;
1292: $insertlist{"$tagnum.color"} = $color;
1293: $insertlist{"$tagnum.function"} = $function;
1294: if (!defined($show)) { $show='yes'; }
1295: $insertlist{"$tagnum.show"}= $show;
1296: $insertlist{"$tag.num"}=$tagnum;
1297: $tagnum++;
1298: }
1299: }
1300: $i++; #skipping TABLE line
1301: $tagnum = 0;
1302: for (;$i < $#data;$i++) {
1303: my $line = $data[$i];
1304: my ($mnemonic,@which) = split(/ +/,$line);
1305: my $tag = $insertlist{"$tagnum.tag"};
1306: for (my $j=0;$j <=$#which;$j++) {
1307: if ( $which[$j] eq 'Y' ) {
1308: if ($insertlist{"$j.show"} ne 'no') {
1309: push(@{ $insertlist{"$tag.which"} },$j);
1310: }
1311: }
1312: }
1313: $tagnum++;
1314: }
1315: }
1316:
1317: sub description {
1318: my ($token)=@_;
1319: my $tagnum;
1320: my $tag=$token->[1];
1321: foreach my $namespace (reverse @Apache::lonxml::namespace) {
1322: my $testtag=$namespace.'::'.$tag;
1323: $tagnum=$insertlist{"$testtag.num"};
1324: if (defined($tagnum)) { last; }
1325: }
1326: if (!defined ($tagnum)) { $tagnum=$Apache::lonxml::insertlist{"$tag.num"}; }
1327: return $insertlist{$tagnum.'.description'};
1328: }
1329:
1330: # ----------------------------------------------------------------- whichuser
1331: # returns a list of $symb, $courseid, $domain, $name that is correct for
1332: # calls to lonnet functions for this setup.
1333: # - looks for form.grade_ parameters
1334: sub whichuser {
1335: my ($symb,$courseid,$domain,$name);
1336: if (defined($ENV{'form.grade_symb'})) {
1337: my $tmp_courseid=$ENV{'form.grade_courseid'};
1338: my $allowed=&Apache::lonnet::allowed('mgr',$tmp_courseid);
1339: if ($allowed) {
1340: $symb=$ENV{'form.grade_symb'};
1341: $courseid=$ENV{'form.grade_courseid'};
1342: $domain=$ENV{'form.grade_domain'};
1343: $name=$ENV{'form.grade_username'};
1344: }
1345: } else {
1346: $symb=&Apache::lonnet::symbread();
1347: $courseid=$ENV{'request.course.id'};
1348: $domain=$ENV{'user.domain'};
1349: $name=$ENV{'user.name'};
1350: }
1351: return ($symb,$courseid,$domain,$name);
1352: }
1353:
1354: 1;
1355: __END__
1356:
1357:
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