1: # The LearningOnline Network with CAPA
2: # XML Parser Module
3: #
4: # $Id: lonxml.pm,v 1.194 2002/09/10 20:53:36 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 $prevent_entity_encode);
64: use strict;
65: use HTML::LCParser();
66: use HTML::TreeBuilder();
67: use HTML::Entities();
68: use Safe();
69: use Safe::Hole();
70: use Math::Cephes();
71: use Math::Random();
72: use Opcode();
73:
74: sub register {
75: my ($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: # if 0 all high ASCII characters will be encoded into HTML Entities
133: $prevent_entity_encode=0;
134:
135: # has the dynamic menu been updated to know about this resource
136: $Apache::lonxml::registered=0;
137:
138: # a pointer the the Apache request object
139: $Apache::lonxml::request='';
140:
141: sub xmlbegin {
142: my $output='';
143: if ($ENV{'browser.mathml'}) {
144: $output='<?xml version="1.0"?>'
145: .'<?xml-stylesheet type="text/css" href="/adm/MathML/mathml.css"?>'
146: .'<!DOCTYPE html SYSTEM "/adm/MathML/mathml.dtd" '
147: .'[<!ENTITY mathns "http://www.w3.org/1998/Math/MathML">]>'
148: .'<html xmlns:math="http://www.w3.org/1998/Math/MathML" '
149: .'xmlns="http://www.w3.org/TR/REC-html40">';
150: } else {
151: $output='<html>';
152: }
153: return $output;
154: }
155:
156: sub xmlend {
157: my ($discussiononly,$symb)=@_;
158: my $discussion='';
159: if ($ENV{'request.course.id'}) {
160: my $crs='/'.$ENV{'request.course.id'};
161: if ($ENV{'request.course.sec'}) {
162: $crs.='_'.$ENV{'request.course.sec'};
163: }
164: $crs=~s/\_/\//g;
165: my $seeid=&Apache::lonnet::allowed('rin',$crs);
166: unless ($symb) {
167: $symb=&Apache::lonnet::symbread();
168: }
169: if ($symb) {
170: my %contrib=&Apache::lonnet::restore($symb,$ENV{'request.course.id'},
171: $ENV{'course.'.$ENV{'request.course.id'}.'.domain'},
172: $ENV{'course.'.$ENV{'request.course.id'}.'.num'});
173: if ($contrib{'version'}) {
174: unless ($discussiononly) {
175: $discussion.=
176: '<address><hr />';
177: }
178: my $idx;
179: for ($idx=1;$idx<=$contrib{'version'};$idx++) {
180: my $hidden=($contrib{'hidden'}=~/\.$idx\./);
181: unless (($hidden) && (!$seeid)) {
182: my $message=$contrib{$idx.':message'};
183: $message=~s/\n/\<br \/\>/g;
184: $message=&Apache::lontexconvert::msgtexconverted($message);
185: if ($message) {
186: if ($hidden) {
187: $message='<font color="#888888">'.$message.'</font>';
188: }
189: my $sender='Anonymous';
190: if ((!$contrib{$idx.':anonymous'}) || ($seeid)) {
191: $sender=&Apache::loncommon::aboutmewrapper(
192: $contrib{$idx.':plainname'},
193: $contrib{$idx.':sendername'},
194: $contrib{$idx.':senderdomain'}).' ('.
195: $contrib{$idx.':sendername'}.' at '.
196: $contrib{$idx.':senderdomain'}.')';
197: if ($contrib{$idx.':anonymous'}) {
198: $sender.=' [anonymous] '.
199: $contrib{$idx.':screenname'};
200: }
201: if ($seeid) {
202: if ($hidden) {
203: $sender.=' <a href="/adm/feedback?unhide='.
204: $symb.':::'.$idx.'">Make Visible</a>';
205: } else {
206: $sender.=' <a href="/adm/feedback?hide='.
207: $symb.':::'.$idx.'">Hide</a>';
208: }
209: }
210: } else {
211: if ($contrib{$idx.':screenname'}) {
212: $sender='<i>'.$contrib{$idx.':screenname'}.'</i>';
213: }
214: }
215: $discussion.='<p><b>'.$sender.'</b> ('.
216: localtime($contrib{$idx.':timestamp'}).
217: '):<blockquote>'.$message.
218: '</blockquote></p>';
219: }
220: }
221: }
222: unless ($discussiononly) {
223: $discussion.='</address>';
224: }
225: }
226: if ($discussiononly) {
227: $discussion.='<h1>'.$symb.'</h1>';
228: }
229: }
230: }
231: return $discussion.($discussiononly?'':'</html>');
232: }
233:
234: sub tokeninputfield {
235: my $defhost=$Apache::lonnet::perlvar{'lonHostID'};
236: $defhost=~tr/a-z/A-Z/;
237: return (<<ENDINPUTFIELD)
238: <script>
239: function updatetoken() {
240: var comp=new Array;
241: var barcode=unescape(document.tokeninput.barcode.value);
242: comp=barcode.split('*');
243: if (typeof(comp[0])!="undefined") {
244: document.tokeninput.codeone.value=comp[0];
245: }
246: if (typeof(comp[1])!="undefined") {
247: document.tokeninput.codetwo.value=comp[1];
248: }
249: if (typeof(comp[2])!="undefined") {
250: comp[2]=comp[2].toUpperCase();
251: document.tokeninput.codethree.value=comp[2];
252: }
253: document.tokeninput.barcode.value='';
254: }
255: </script>
256: <form method="post" name="tokeninput">
257: <table border="2" bgcolor="#FFFFBB">
258: <tr><th>DocID Checkin</th></tr>
259: <tr><td>
260: <table>
261: <tr>
262: <td>Scan in Barcode</td>
263: <td><input type="text" size="22" name="barcode"
264: onChange="updatetoken()"/></td>
265: </tr>
266: <tr><td><i>or</i> Type in DocID</td>
267: <td>
268: <input type="text" size="5" name="codeone" />
269: <b><font size="+2">*</font></b>
270: <input type="text" size="5" name="codetwo" />
271: <b><font size="+2">*</font></b>
272: <input type="text" size="10" name="codethree" value="$defhost"
273: onChange="this.value=this.value.toUpperCase()" />
274: </td></tr>
275: </table>
276: </td></tr>
277: <tr><td><input type="submit" value="Check in DocID" /></td></tr>
278: </table>
279: </form>
280: ENDINPUTFIELD
281: }
282:
283: sub maketoken {
284: my ($symb,$tuname,$tudom,$tcrsid)=@_;
285: unless ($symb) {
286: $symb=&Apache::lonnet::symbread();
287: }
288: unless ($tuname) {
289: $tuname=$ENV{'user.name'};
290: $tudom=$ENV{'user.domain'};
291: $tcrsid=$ENV{'request.course.id'};
292: }
293:
294: return &Apache::lonnet::checkout($symb,$tuname,$tudom,$tcrsid);
295: }
296:
297: sub printtokenheader {
298: my ($target,$token,$tsymb,$tcrsid,$tudom,$tuname)=@_;
299: unless ($token) { return ''; }
300:
301: my ($symb,$courseid,$domain,$name) = &Apache::lonxml::whichuser();
302: unless ($tsymb) {
303: $tsymb=$symb;
304: }
305: unless ($tuname) {
306: $tuname=$name;
307: $tudom=$domain;
308: $tcrsid=$courseid;
309: }
310:
311: my %reply=&Apache::lonnet::get('environment',
312: ['firstname','middlename','lastname','generation'],
313: $tudom,$tuname);
314: my $plainname=$reply{'firstname'}.' '.
315: $reply{'middlename'}.' '.
316: $reply{'lastname'}.' '.
317: $reply{'generation'};
318:
319: if ($target eq 'web') {
320: my %idhash=&Apache::lonnet::idrget($tudom,($tuname));
321: return
322: '<img align="right" src="/cgi-bin/barcode.gif?encode='.$token.'" />'.
323: 'Checked out for '.$plainname.
324: '<br />User: '.$tuname.' at '.$tudom.
325: '<br />ID: '.$idhash{$tuname}.
326: '<br />CourseID: '.$tcrsid.
327: '<br />Course: '.$ENV{'course.'.$tcrsid.'.description'}.
328: '<br />DocID: '.$token.
329: '<br />Time: '.localtime().'<hr />';
330: } else {
331: return $token;
332: }
333: }
334:
335: sub fontsettings() {
336: my $headerstring='';
337: if (($ENV{'browser.os'} eq 'mac') && (!$ENV{'browser.mathml'})) {
338: $headerstring.=
339: '<meta Content-Type="text/html; charset=x-mac-roman">';
340: }
341: return $headerstring;
342: }
343:
344: sub registerurl {
345: my $forcereg=shift;
346: my $target = shift;
347: my $result = '';
348: if ($target eq 'edit') {
349: $result .="<script>\n".
350: "if (typeof menu != 'undefined') {menu.currentURL=null;}\n".
351: &Apache::loncommon::browser_and_searcher_javascript().
352: "\n</script>\n";
353: }
354: if ((($ENV{'request.publicaccess'}) ||
355: (!&Apache::lonnet::is_on_map($ENV{'REQUEST_URI'}))) &&
356: (!$forcereg)) {
357: return $result.
358: '<script>function LONCAPAreg(){} function LONCAPAstale(){}</script>';
359: }
360: if ($Apache::lonxml::registered && !$forcereg) { return ''; }
361: $Apache::lonxml::registered=1;
362: my $nothing='';
363: if ($ENV{'browser.type'} eq 'explorer') { $nothing='javascript:void(0);'; }
364: my $timesync='menu.syncclock(1000*'.time.');';
365: if (($ENV{'REQUEST_URI'}!~/^\/(res\/)*adm\//) || ($forcereg)) {
366: my $hwkadd='';
367: if ($ENV{'request.filename'}=~/\.(problem|exam|quiz|assess|survey|form)$/) {
368: if (&Apache::lonnet::allowed('vgr',$ENV{'request.course.id'})) {
369: $hwkadd.=(<<ENDSUBM);
370: menu.switchbutton(7,1,'subm.gif','view sub','missions','gocmd("/adm/grades","submission")');
371: ENDSUBM
372: }
373: if (&Apache::lonnet::allowed('mgr',$ENV{'request.course.id'})) {
374: $hwkadd.=(<<ENDGRDS);
375: menu.switchbutton(7,2,'pgrd.gif','problem','grades','gocmd("/adm/grades","gradingmenu")');
376: ENDGRDS
377: }
378: if (&Apache::lonnet::allowed('opa',$ENV{'request.course.id'})) {
379: $hwkadd.=(<<ENDPARM);
380: menu.switchbutton(7,3,'pparm.gif','problem','parms','gocmd("/adm/parmset","set")');
381: ENDPARM
382: }
383: }
384: $result = (<<ENDREGTHIS);
385:
386: <script language="JavaScript">
387: // BEGIN LON-CAPA Internal
388:
389: function LONCAPAreg() {
390: menu=window.open("$nothing","LONCAPAmenu","",false);
391: menu.clearTimeout(menu.menucltim);
392: $timesync
393: menu.currentURL=window.location.pathname;
394: menu.reloadURL=window.location.pathname;
395: menu.currentStale=0;
396: menu.clearbut(3,1);
397: menu.switchbutton
398: (6,3,'catalog.gif','catalog','info','catalog_info()');
399: menu.switchbutton
400: (8,1,'eval.gif','evaluate','this','gopost("/adm/evaluate",currentURL)');
401: menu.switchbutton
402: (8,2,'fdbk.gif','feedback','discuss','gopost("/adm/feedback",currentURL)');
403: menu.switchbutton
404: (8,3,'prt.gif','prepare','printout','gopost("/adm/printout",currentURL)');
405: menu.switchbutton
406: (2,1,'back.gif','backward','','gopost("/adm/flip","back:"+currentURL)');
407: menu.switchbutton
408: (2,3,'forw.gif','forward','','gopost("/adm/flip","forward:"+currentURL)');
409: menu.switchbutton
410: (9,1,'sbkm.gif','set','bookmark','set_bookmark()');
411: menu.switchbutton
412: (9,2,'vbkm.gif','view','bookmark','edit_bookmarks()');
413: menu.switchbutton
414: (9,3,'anot.gif','anno-','tations','annotate()');
415: $hwkadd
416: }
417:
418: function LONCAPAstale() {
419: menu=window.open("$nothing","LONCAPAmenu","",false);
420: menu.currentStale=1;
421: if (menu.reloadURL!='' && menu.reloadURL!= null) {
422: menu.switchbutton
423: (3,1,'reload.gif','return','location','go(reloadURL)');
424: }
425: menu.clearbut(7,1);
426: menu.clearbut(7,2);
427: menu.clearbut(7,3);
428: menu.menucltim=menu.setTimeout(
429: 'clearbut(2,1);clearbut(2,3);clearbut(8,1);clearbut(8,2);clearbut(8,3);'+
430: 'clearbut(9,1);clearbut(9,2);clearbut(9,3);clearbut(6,3)',
431: 2000);
432:
433: }
434:
435: // END LON-CAPA Internal
436: </script>
437: ENDREGTHIS
438:
439: } else {
440: $result = (<<ENDDONOTREGTHIS);
441:
442: <script language="JavaScript">
443: // BEGIN LON-CAPA Internal
444:
445: function LONCAPAreg() {
446: menu=window.open("$nothing","LONCAPAmenu","",false);
447: $timesync
448: menu.currentStale=1;
449: menu.clearbut(2,1);
450: menu.clearbut(2,3);
451: menu.clearbut(8,1);
452: menu.clearbut(8,2);
453: menu.clearbut(8,3);
454: if (menu.currentURL) {
455: menu.switchbutton
456: (3,1,'reload.gif','return','location','go(currentURL)');
457: } else {
458: menu.clearbut(3,1);
459: }
460: }
461:
462: function LONCAPAstale() {
463: }
464:
465: // END LON-CAPA Internal
466: </script>
467: ENDDONOTREGTHIS
468: }
469: return $result;
470: }
471:
472: sub loadevents() {
473: return 'LONCAPAreg();';
474: }
475:
476: sub unloadevents() {
477: return 'LONCAPAstale();';
478: }
479:
480: sub printalltags {
481: my $temp;
482: foreach $temp (sort keys %Apache::lonxml::alltags) {
483: &Apache::lonxml::debug("$temp -- ".
484: join(',',@{ $Apache::lonxml::alltags{$temp} }));
485: }
486: }
487:
488: sub xmlparse {
489: my ($request,$target,$content_file_string,$safeinit,%style_for_target) = @_;
490:
491: &setup_globals($request,$target);
492: #
493: # do we have a course style file?
494: #
495:
496: if ($ENV{'request.course.id'}) {
497: my $bodytext=
498: $ENV{'course.'.$ENV{'request.course.id'}.'.default_xml_style'};
499: if ($bodytext) {
500: my $location=&Apache::lonnet::filelocation('',$bodytext);
501: my $styletext=&Apache::lonnet::getfile($location);
502: if ($styletext ne '-1') {
503: %style_for_target = (%style_for_target,
504: &Apache::style::styleparser($target,$styletext));
505: }
506: }
507: }
508:
509: #&printalltags();
510: my @pars = ();
511: my $pwd=$ENV{'request.filename'};
512: $pwd =~ s:/[^/]*$::;
513: &newparser(\@pars,\$content_file_string,$pwd);
514:
515: my $safeeval = new Safe;
516: my $safehole = new Safe::Hole;
517: &init_safespace($target,$safeeval,$safehole,$safeinit);
518: #-------------------- Redefinition of the target in the case of compound target
519:
520: ($target, my @tenta) = split('&&',$target);
521:
522: my @stack = ();
523: my @parstack = ();
524: &initdepth;
525:
526: my $finaloutput = &inner_xmlparse($target,\@stack,\@parstack,\@pars,
527: $safeeval,\%style_for_target);
528: if ($ENV{'request.uri'}) {
529: &writeallows($ENV{'request.uri'});
530: }
531: return $finaloutput;
532: }
533:
534: sub htmlclean {
535: my ($raw,$full)=@_;
536:
537: my $tree = HTML::TreeBuilder->new;
538: $tree->ignore_unknown(0);
539:
540: $tree->parse($raw);
541:
542: my $output= $tree->as_HTML(undef,' ');
543:
544: $output=~s/\<(br|hr|img|meta|allow)(.*?)\>/\<$1$2 \/\>/gis;
545: $output=~s/\<\/(br|hr|img|meta|allow)\>//gis;
546: unless ($full) {
547: $output=~s/\<[\/]*(body|head|html)\>//gis;
548: }
549:
550: $tree = $tree->delete;
551:
552: return $output;
553: }
554:
555: sub latex_special_symbols {
556: my ($current_token,$stack,$parstack)=@_;
557: $current_token=~s/\\/\\char92 /g;
558: $current_token=~s/\^/\\char94 /g;
559: $current_token=~s/\~/\\char126 /g;
560: $current_token=~s/(&[^a-z#])/\\$1/g;
561: $current_token=~s/([^&]\#)/\\$1/g;
562: $current_token=~s/(\$|_|{|})/\\$1/g;
563: $current_token=~s/\\char92 /\\texttt{\\char92}/g;
564: $current_token=~s/>/\$>\$/g; #more
565: $current_token=~s/</\$<\$/g; #less
566: if ($current_token=~m/\d%/) {$current_token =~ s/(\d)%/$1\\%/g;} #percent after digit
567: if ($current_token=~m/\s%/) {$current_token =~ s/(\s)%/$1\\%/g;} #persent after space
568: return $current_token;
569: }
570:
571: sub inner_xmlparse {
572: my ($target,$stack,$parstack,$pars,$safeeval,$style_for_target)=@_;
573: my $finaloutput = '';
574: my $result;
575: my $token;
576: while ( $#$pars > -1 ) {
577: while ($token = $$pars['-1']->get_token) {
578: if (($token->[0] eq 'T') || ($token->[0] eq 'C') || ($token->[0] eq 'D') ) {
579: if ($metamode<1) {
580: my $text=$token->[1];
581: if ($token->[0] eq 'C' && $target eq 'tex') {
582: $text = '%'.$text;
583: $text =~ s/[\n\r]//g;
584: }
585: $result.=$text;
586: }
587: } elsif ($token->[0] eq 'PI') {
588: if ($metamode<1) {
589: $result=$token->[2];
590: }
591: } elsif ($token->[0] eq 'S') {
592: # add tag to stack
593: push (@$stack,$token->[1]);
594: # add parameters list to another stack
595: push (@$parstack,&parstring($token));
596: &increasedepth($token);
597: if (exists $$style_for_target{$token->[1]}) {
598: if ($Apache::lonxml::redirection) {
599: $Apache::lonxml::outputstack['-1'] .=
600: &recurse($$style_for_target{$token->[1]},$target,$safeeval,
601: $style_for_target,@$parstack);
602: } else {
603: $finaloutput .= &recurse($$style_for_target{$token->[1]},$target,
604: $safeeval,$style_for_target,@$parstack);
605: }
606: } else {
607: $result = &callsub("start_$token->[1]", $target, $token, $stack,
608: $parstack, $pars, $safeeval, $style_for_target);
609: }
610: } elsif ($token->[0] eq 'E') {
611: #clear out any tags that didn't end
612: while ($token->[1] ne $$stack['-1'] && ($#$stack > -1)) {
613: my $lasttag=$$stack[-1];
614: if ($token->[1] =~ /^$lasttag$/i) {
615: &Apache::lonxml::warning('Using tag </'.$token->[1].'> as end tag to <'.$$stack[-1].'>');
616: last;
617: } else {
618: &Apache::lonxml::warning('Found tag </'.$token->[1].'> when looking for </'.$$stack[-1].'> in file');
619: &end_tag($stack,$parstack,$token);
620: }
621: }
622:
623: if (exists($$style_for_target{'/'."$token->[1]"})) {
624: if ($Apache::lonxml::redirection) {
625: $Apache::lonxml::outputstack['-1'] .=
626: &recurse($$style_for_target{'/'."$token->[1]"},
627: $target,$safeeval,$style_for_target,@$parstack);
628: } else {
629: $finaloutput .= &recurse($$style_for_target{'/'."$token->[1]"},
630: $target,$safeeval,$style_for_target,
631: @$parstack);
632: }
633: } else {
634: $result = &callsub("end_$token->[1]", $target, $token, $stack,
635: $parstack, $pars,$safeeval, $style_for_target);
636: }
637: } else {
638: &Apache::lonxml::error("Unknown token event :$token->[0]:$token->[1]:");
639: }
640: #evaluate variable refs in result
641: if ($result ne "") {
642: if ( $#$parstack > -1 ) {
643: $result=&Apache::run::evaluate($result,$safeeval,$$parstack[-1]);
644: } else {
645: $result= &Apache::run::evaluate($result,$safeeval,'');
646: }
647: }
648: if (($token->[0] eq 'T') || ($token->[0] eq 'C') || ($token->[0] eq 'D') ) {
649: if ($target eq 'tex') {
650: $result=&latex_special_symbols($result,$stack,$parstack);
651: }
652: }
653:
654: # Encode any high ASCII characters
655: if (!$Apache::lonxml::prevent_entity_encode) {
656: $result=&HTML::Entities::encode($result,"\200-\377");
657: }
658: if ($Apache::lonxml::redirection) {
659: $Apache::lonxml::outputstack['-1'] .= $result;
660: } else {
661: $finaloutput.=$result;
662: }
663: $result = '';
664:
665: if ($token->[0] eq 'E') {
666: &end_tag($stack,$parstack,$token);
667: }
668: }
669: pop @$pars;
670: pop @Apache::lonxml::pwd;
671: }
672:
673: # if ($target eq 'meta') {
674: # $finaloutput.=&endredirection;
675: # }
676:
677:
678: if (($ENV{'QUERY_STRING'}) && ($target eq 'web')) {
679: $finaloutput=&afterburn($finaloutput);
680: }
681: return $finaloutput;
682: }
683:
684: sub recurse {
685: my @innerstack = ();
686: my @innerparstack = ();
687: my ($newarg,$target,$safeeval,$style_for_target,@parstack) = @_;
688: my @pat = ();
689: &newparser(\@pat,\$newarg);
690: my $tokenpat;
691: my $partstring = '';
692: my $output='';
693: my $decls='';
694: &Apache::lonxml::debug("Recursing");
695: while ( $#pat > -1 ) {
696: while ($tokenpat = $pat[$#pat]->get_token) {
697: if (($tokenpat->[0] eq 'T') || ($tokenpat->[0] eq 'C') || ($tokenpat->[0] eq 'D') ) {
698: if ($metamode<1) { $partstring=$tokenpat->[1]; }
699: } elsif ($tokenpat->[0] eq 'PI') {
700: if ($metamode<1) { $partstring=$tokenpat->[2]; }
701: } elsif ($tokenpat->[0] eq 'S') {
702: push (@innerstack,$tokenpat->[1]);
703: push (@innerparstack,&parstring($tokenpat));
704: &increasedepth($tokenpat);
705: $partstring = &callsub("start_$tokenpat->[1]", $target, $tokenpat,
706: \@innerstack, \@innerparstack, \@pat,
707: $safeeval, $style_for_target);
708: } elsif ($tokenpat->[0] eq 'E') {
709: #clear out any tags that didn't end
710: while ($tokenpat->[1] ne $innerstack[$#innerstack]
711: && ($#innerstack > -1)) {
712: my $lasttag=$innerstack[-1];
713: if ($tokenpat->[1] =~ /^$lasttag$/i) {
714: &Apache::lonxml::warning('Using tag </'.$tokenpat->[1].'> as end tag to <'.$innerstack[-1].'>');
715: last;
716: } else {
717: &Apache::lonxml::warning('Found tag </'.$tokenpat->[1].'> when looking for </'.$innerstack[-1].'> in file');
718: &end_tag(\@innerstack,\@innerparstack,$tokenpat);
719: }
720: }
721: $partstring = &callsub("end_$tokenpat->[1]", $target, $tokenpat,
722: \@innerstack, \@innerparstack, \@pat,
723: $safeeval, $style_for_target);
724: } else {
725: &Apache::lonxml::error("Unknown token event :$tokenpat->[0]:$tokenpat->[1]:");
726: }
727: #pass both the variable to the style tag, and the tag we
728: #are processing inside the <definedtag>
729: if ( $partstring ne "" ) {
730: if ( $#parstack > -1 ) {
731: if ( $#innerparstack > -1 ) {
732: $decls= $parstack[$#parstack].$innerparstack[$#innerparstack];
733: } else {
734: $decls= $parstack[$#parstack];
735: }
736: } else {
737: if ( $#innerparstack > -1 ) {
738: $decls=$innerparstack[$#innerparstack];
739: } else {
740: $decls='';
741: }
742: }
743: $output .= &Apache::run::evaluate($partstring,$safeeval,$decls);
744: $partstring = '';
745: }
746: if ($tokenpat->[0] eq 'E') { pop @innerstack;pop @innerparstack;
747: &decreasedepth($tokenpat);}
748: }
749: pop @pat;
750: pop @Apache::lonxml::pwd;
751: }
752: &Apache::lonxml::debug("Exiting Recursing");
753: return $output;
754: }
755:
756: sub callsub {
757: my ($sub,$target,$token,$tagstack,$parstack,$parser,$safeeval,$style)=@_;
758: my $currentstring='';
759: my $nodefault;
760: {
761: my $sub1;
762: no strict 'refs';
763: my $tag=$token->[1];
764: my $space=$Apache::lonxml::alltags{$tag}[-1];
765: if (!$space) {
766: $tag=~tr/A-Z/a-z/;
767: $sub=~tr/A-Z/a-z/;
768: $space=$Apache::lonxml::alltags{$tag}[-1]
769: }
770:
771: my $deleted=0;
772: $Apache::lonxml::curdepth=join('_',@Apache::lonxml::depthcounter);
773: if (($token->[0] eq 'S') && ($target eq 'modified')) {
774: $deleted=&Apache::edit::handle_delete($space,$target,$token,$tagstack,
775: $parstack,$parser,$safeeval,
776: $style);
777: }
778: if (!$deleted) {
779: if ($space) {
780: &Apache::lonxml::debug("Calling sub $sub in $space $metamode");
781: $sub1="$space\:\:$sub";
782: ($currentstring,$nodefault) = &$sub1($target,$token,$tagstack,
783: $parstack,$parser,$safeeval,
784: $style);
785: } else {
786: &Apache::lonxml::debug("NOT Calling sub $sub in $space $metamode");
787: if ($metamode <1) {
788: if (defined($token->[4]) && ($metamode < 1)) {
789: $currentstring = $token->[4];
790: } else {
791: $currentstring = $token->[2];
792: }
793: }
794: }
795: # &Apache::lonxml::debug("nodefalt:$nodefault:");
796: if ($currentstring eq '' && $nodefault eq '') {
797: if ($target eq 'edit') {
798: &Apache::lonxml::debug("doing default edit for $token->[1]");
799: if ($token->[0] eq 'S') {
800: $currentstring = &Apache::edit::tag_start($target,$token);
801: } elsif ($token->[0] eq 'E') {
802: $currentstring = &Apache::edit::tag_end($target,$token);
803: }
804: } elsif ($target eq 'modified') {
805: if ($token->[0] eq 'S') {
806: $currentstring = $token->[4];
807: $currentstring.=&Apache::edit::handle_insert();
808: } else {
809: $currentstring = $token->[2];
810: }
811: }
812: }
813: }
814: use strict 'refs';
815: }
816: return $currentstring;
817: }
818:
819: sub setup_globals {
820: my ($request,$target)=@_;
821: $Apache::lonxml::request=$request;
822: $Apache::lonxml::registered = 0;
823: @Apache::lonxml::pwd=();
824: @Apache::lonxml::extlinks=();
825: if ($target eq 'meta') {
826: $Apache::lonxml::redirection = 0;
827: $Apache::lonxml::metamode = 1;
828: $Apache::lonxml::evaluate = 1;
829: $Apache::lonxml::import = 0;
830: } elsif ($target eq 'answer') {
831: $Apache::lonxml::redirection = 0;
832: $Apache::lonxml::metamode = 1;
833: $Apache::lonxml::evaluate = 1;
834: $Apache::lonxml::import = 1;
835: } elsif ($target eq 'grade') {
836: &startredirection;
837: $Apache::lonxml::metamode = 0;
838: $Apache::lonxml::evaluate = 1;
839: $Apache::lonxml::import = 1;
840: } elsif ($target eq 'modified') {
841: $Apache::lonxml::redirection = 0;
842: $Apache::lonxml::metamode = 0;
843: $Apache::lonxml::evaluate = 0;
844: $Apache::lonxml::import = 0;
845: } elsif ($target eq 'edit') {
846: $Apache::lonxml::redirection = 0;
847: $Apache::lonxml::metamode = 0;
848: $Apache::lonxml::evaluate = 0;
849: $Apache::lonxml::import = 0;
850: } elsif ($target eq 'analyze') {
851: $Apache::lonxml::redirection = 0;
852: $Apache::lonxml::metamode = 0;
853: $Apache::lonxml::evaluate = 1;
854: $Apache::lonxml::import = 1;
855: } else {
856: $Apache::lonxml::redirection = 0;
857: $Apache::lonxml::metamode = 0;
858: $Apache::lonxml::evaluate = 1;
859: $Apache::lonxml::import = 1;
860: }
861: }
862:
863: sub init_safespace {
864: my ($target,$safeeval,$safehole,$safeinit) = @_;
865: $safeeval->permit("entereval");
866: $safeeval->permit(":base_math");
867: $safeeval->permit("sort");
868: $safeeval->deny(":base_io");
869: $safehole->wrap(\&Apache::scripttag::xmlparse,$safeeval,'&xmlparse');
870: $safehole->wrap(\&Apache::lonnet::EXT,$safeeval,'&EXT');
871:
872: $safehole->wrap(\&Math::Cephes::asin,$safeeval,'&asin');
873: $safehole->wrap(\&Math::Cephes::acos,$safeeval,'&acos');
874: $safehole->wrap(\&Math::Cephes::atan,$safeeval,'&atan');
875: $safehole->wrap(\&Math::Cephes::sinh,$safeeval,'&sinh');
876: $safehole->wrap(\&Math::Cephes::cosh,$safeeval,'&cosh');
877: $safehole->wrap(\&Math::Cephes::tanh,$safeeval,'&tanh');
878: $safehole->wrap(\&Math::Cephes::asinh,$safeeval,'&asinh');
879: $safehole->wrap(\&Math::Cephes::acosh,$safeeval,'&acosh');
880: $safehole->wrap(\&Math::Cephes::atanh,$safeeval,'&atanh');
881: $safehole->wrap(\&Math::Cephes::erf,$safeeval,'&erf');
882: $safehole->wrap(\&Math::Cephes::erfc,$safeeval,'&erfc');
883: $safehole->wrap(\&Math::Cephes::j0,$safeeval,'&j0');
884: $safehole->wrap(\&Math::Cephes::j1,$safeeval,'&j1');
885: $safehole->wrap(\&Math::Cephes::jn,$safeeval,'&jn');
886: $safehole->wrap(\&Math::Cephes::jv,$safeeval,'&jv');
887: $safehole->wrap(\&Math::Cephes::y0,$safeeval,'&y0');
888: $safehole->wrap(\&Math::Cephes::y1,$safeeval,'&y1');
889: $safehole->wrap(\&Math::Cephes::yn,$safeeval,'&yn');
890: $safehole->wrap(\&Math::Cephes::yv,$safeeval,'&yv');
891: $safehole->wrap(\&Math::Random::random_beta,$safeeval,'&math_random_beta');
892: $safehole->wrap(\&Math::Random::random_chi_square,$safeeval,'&math_random_chi_square');
893: $safehole->wrap(\&Math::Random::random_exponential,$safeeval,'&math_random_exponential');
894: $safehole->wrap(\&Math::Random::random_f,$safeeval,'&math_random_f');
895: $safehole->wrap(\&Math::Random::random_gamma,$safeeval,'&math_random_gamma');
896: $safehole->wrap(\&Math::Random::random_multivariate_normal,$safeeval,'&math_random_multivariate_normal');
897: $safehole->wrap(\&Math::Random::random_multinomial,$safeeval,'&math_random_multinomial');
898: $safehole->wrap(\&Math::Random::random_noncentral_chi_square,$safeeval,'&math_random_noncentral_chi_square');
899: $safehole->wrap(\&Math::Random::random_noncentral_f,$safeeval,'&math_random_noncentral_f');
900: $safehole->wrap(\&Math::Random::random_normal,$safeeval,'&math_random_normal');
901: $safehole->wrap(\&Math::Random::random_permutation,$safeeval,'&math_random_permutation');
902: $safehole->wrap(\&Math::Random::random_permuted_index,$safeeval,'&math_random_permuted_index');
903: $safehole->wrap(\&Math::Random::random_uniform,$safeeval,'&math_random_uniform');
904: $safehole->wrap(\&Math::Random::random_poisson,$safeeval,'&math_random_poisson');
905: $safehole->wrap(\&Math::Random::random_uniform_integer,$safeeval,'&math_random_uniform_integer');
906: $safehole->wrap(\&Math::Random::random_negative_binomial,$safeeval,'&math_random_negative_binomial');
907: $safehole->wrap(\&Math::Random::random_binomial,$safeeval,'&math_random_binomial');
908: $safehole->wrap(\&Math::Random::random_seed_from_phrase,$safeeval,'&random_seed_from_phrase');
909: $safehole->wrap(\&Math::Random::random_set_seed_from_phrase,$safeeval,'&random_set_seed_from_phrase');
910: $safehole->wrap(\&Math::Random::random_get_seed,$safeeval,'&random_get_seed');
911: $safehole->wrap(\&Math::Random::random_set_seed,$safeeval,'&random_set_seed');
912:
913: #need to inspect this class of ops
914: # $safeeval->deny(":base_orig");
915: $safeinit .= ';$external::target="'.$target.'";';
916: my $rndseed;
917: my ($symb,$courseid,$domain,$name) = &Apache::lonxml::whichuser();
918: $rndseed=&Apache::lonnet::rndseed($symb,$courseid,$domain,$name);
919: $safeinit .= ';$external::randomseed='.$rndseed.';';
920: &Apache::run::run($safeinit,$safeeval);
921: }
922:
923: sub startredirection {
924: $Apache::lonxml::redirection++;
925: push (@Apache::lonxml::outputstack, '');
926: }
927:
928: sub endredirection {
929: if (!$Apache::lonxml::redirection) {
930: &Apache::lonxml::error("Endredirection was called, before a startredirection, perhaps you have unbalanced tags. Some debuging information:".join ":",caller);
931: return '';
932: }
933: $Apache::lonxml::redirection--;
934: pop @Apache::lonxml::outputstack;
935: }
936:
937: sub end_tag {
938: my ($tagstack,$parstack,$token)=@_;
939: pop(@$tagstack);
940: pop(@$parstack);
941: &decreasedepth($token);
942: }
943:
944: sub initdepth {
945: @Apache::lonxml::depthcounter=();
946: $Apache::lonxml::depth=-1;
947: $Apache::lonxml::olddepth=-1;
948: }
949:
950: sub increasedepth {
951: my ($token) = @_;
952: $Apache::lonxml::depth++;
953: $Apache::lonxml::depthcounter[$Apache::lonxml::depth]++;
954: if ($Apache::lonxml::depthcounter[$Apache::lonxml::depth]==1) {
955: $Apache::lonxml::olddepth=$Apache::lonxml::depth;
956: }
957: my $curdepth=join('_',@Apache::lonxml::depthcounter);
958: &Apache::lonxml::debug("s $Apache::lonxml::depth : $Apache::lonxml::olddepth : $curdepth : $token->[1]\n");
959: #print "<br />s $Apache::lonxml::depth : $Apache::lonxml::olddepth : $curdepth : $token->[1]\n";
960: }
961:
962: sub decreasedepth {
963: my ($token) = @_;
964: $Apache::lonxml::depth--;
965: if ($Apache::lonxml::depth<$Apache::lonxml::olddepth-1) {
966: $#Apache::lonxml::depthcounter--;
967: $Apache::lonxml::olddepth=$Apache::lonxml::depth+1;
968: }
969: if ( $Apache::lonxml::depth < -1) {
970: &Apache::lonxml::warning("Missing tags, unable to properly run file.");
971: $Apache::lonxml::depth='-1';
972: }
973: my $curdepth=join('_',@Apache::lonxml::depthcounter);
974: &Apache::lonxml::debug("e $Apache::lonxml::depth : $Apache::lonxml::olddepth : $token->[1] : $curdepth\n");
975: #print "<br />e $Apache::lonxml::depth : $Apache::lonxml::olddepth : $token->[1] : $curdepth\n";
976: }
977:
978: sub get_all_text_unbalanced {
979: #there is a copy of this in lonpublisher.pm
980: my($tag,$pars)= @_;
981: my $token;
982: my $result='';
983: $tag='<'.$tag.'>';
984: while ($token = $$pars[-1]->get_token) {
985: if (($token->[0] eq 'T')||($token->[0] eq 'C')||($token->[0] eq 'D')) {
986: $result.=$token->[1];
987: } elsif ($token->[0] eq 'PI') {
988: $result.=$token->[2];
989: } elsif ($token->[0] eq 'S') {
990: $result.=$token->[4];
991: } elsif ($token->[0] eq 'E') {
992: $result.=$token->[2];
993: }
994: if ($result =~ /(.*)$tag(.*)/) {
995: &Apache::lonxml::debug('Got a winner with leftovers ::'.$2);
996: &Apache::lonxml::debug('Result is :'.$1);
997: $result=$1;
998: my $redo=$tag.$2;
999: &Apache::lonxml::newparser($pars,\$redo);
1000: last;
1001: }
1002: }
1003: return $result
1004: }
1005:
1006: sub get_all_text {
1007: my($tag,$pars)= @_;
1008: my $depth=0;
1009: my $token;
1010: my $result='';
1011: if ( $tag =~ m:^/: ) {
1012: my $tag=substr($tag,1);
1013: # &Apache::lonxml::debug("have:$tag:");
1014: while (($depth >=0) && ($token = $pars->get_token)) {
1015: # &Apache::lonxml::debug("e token:$token->[0]:$depth:$token->[1]");
1016: if (($token->[0] eq 'T')||($token->[0] eq 'C')||($token->[0] eq 'D')) {
1017: $result.=$token->[1];
1018: } elsif ($token->[0] eq 'PI') {
1019: $result.=$token->[2];
1020: } elsif ($token->[0] eq 'S') {
1021: if ($token->[1] =~ /^$tag$/i) { $depth++; }
1022: $result.=$token->[4];
1023: } elsif ($token->[0] eq 'E') {
1024: if ( $token->[1] =~ /^$tag$/i) { $depth--; }
1025: #skip sending back the last end tag
1026: if ($depth > -1) { $result.=$token->[2]; } else {
1027: $pars->unget_token($token);
1028: }
1029: }
1030: }
1031: } else {
1032: while ($token = $pars->get_token) {
1033: # &Apache::lonxml::debug("s token:$token->[0]:$depth:$token->[1]");
1034: if (($token->[0] eq 'T')||($token->[0] eq 'C')||($token->[0] eq 'D')) {
1035: $result.=$token->[1];
1036: } elsif ($token->[0] eq 'PI') {
1037: $result.=$token->[2];
1038: } elsif ($token->[0] eq 'S') {
1039: if ( $token->[1] =~ /^$tag$/i) {
1040: $pars->unget_token($token); last;
1041: } else {
1042: $result.=$token->[4];
1043: }
1044: } elsif ($token->[0] eq 'E') {
1045: $result.=$token->[2];
1046: }
1047: }
1048: }
1049: # &Apache::lonxml::debug("Exit:$result:");
1050: return $result
1051: }
1052:
1053: sub newparser {
1054: my ($parser,$contentref,$dir) = @_;
1055: push (@$parser,HTML::LCParser->new($contentref));
1056: $$parser['-1']->xml_mode('1');
1057: if ( $dir eq '' ) {
1058: push (@Apache::lonxml::pwd, $Apache::lonxml::pwd[$#Apache::lonxml::pwd]);
1059: } else {
1060: push (@Apache::lonxml::pwd, $dir);
1061: }
1062: # &Apache::lonxml::debug("pwd:$#Apache::lonxml::pwd");
1063: # &Apache::lonxml::debug("pwd:$Apache::lonxml::pwd[$#Apache::lonxml::pwd]");
1064: }
1065:
1066: sub parstring {
1067: my ($token) = @_;
1068: my $temp='';
1069: foreach (@{$token->[3]}) {
1070: unless ($_=~/\W/) {
1071: my $val=$token->[2]->{$_};
1072: $val =~ s/([\%\@\\\"])/\\$1/g;
1073: #if ($val =~ m/^[\%\@]/) { $val="\\".$val; }
1074: $temp .= "my \$$_=\"$val\";"
1075: }
1076: }
1077: return $temp;
1078: }
1079:
1080: sub writeallows {
1081: unless ($#extlinks>=0) { return; }
1082: my $thisurl='/res/'.&Apache::lonnet::declutter(shift);
1083: if ($ENV{'httpref.'.$thisurl}) {
1084: $thisurl=$ENV{'httpref.'.$thisurl};
1085: }
1086: my $thisdir=$thisurl;
1087: $thisdir=~s/\/[^\/]+$//;
1088: my %httpref=();
1089: foreach (@extlinks) {
1090: $httpref{'httpref.'.
1091: &Apache::lonnet::hreflocation($thisdir,$_)}=$thisurl;
1092: }
1093: @extlinks=();
1094: &Apache::lonnet::appenv(%httpref);
1095: }
1096:
1097: #
1098: # Afterburner handles anchors, highlights and links
1099: #
1100: sub afterburn {
1101: my $result=shift;
1102: &Apache::loncommon::get_unprocessed_cgi($ENV{'QUERY_STRING'},
1103: ['highlight','anchor','link']);
1104: if ($ENV{'form.highlight'}) {
1105: foreach (split(/\,/,$ENV{'form.highlight'})) {
1106: my $anchorname=$_;
1107: my $matchthis=$anchorname;
1108: $matchthis=~s/\_+/\\s\+/g;
1109: $result=~s/($matchthis)/\<font color=\"red\"\>$1\<\/font\>/gs;
1110: }
1111: }
1112: if ($ENV{'form.link'}) {
1113: foreach (split(/\,/,$ENV{'form.link'})) {
1114: my ($anchorname,$linkurl)=split(/\>/,$_);
1115: my $matchthis=$anchorname;
1116: $matchthis=~s/\_+/\\s\+/g;
1117: $result=~s/($matchthis)/\<a href=\"$linkurl\"\>$1\<\/a\>/gs;
1118: }
1119: }
1120: if ($ENV{'form.anchor'}) {
1121: my $anchorname=$ENV{'form.anchor'};
1122: my $matchthis=$anchorname;
1123: $matchthis=~s/\_+/\\s\+/g;
1124: $result=~s/($matchthis)/\<a name=\"$anchorname\"\>$1\<\/a\>/s;
1125: $result.=(<<"ENDSCRIPT");
1126: <script>
1127: document.location.hash='$anchorname';
1128: </script>
1129: ENDSCRIPT
1130: }
1131: return $result;
1132: }
1133:
1134: sub storefile {
1135: my ($file,$contents)=@_;
1136: if (my $fh=Apache::File->new('>'.$file)) {
1137: print $fh $contents;
1138: $fh->close();
1139: } else {
1140: &warning("Unable to save file $file");
1141: }
1142: }
1143:
1144: sub createnewhtml {
1145: my $filecontents=(<<SIMPLECONTENT);
1146: <html>
1147: <head>
1148: <title>
1149: Title of Document Goes Here
1150: </title>
1151: </head>
1152: <body bgcolor="#FFFFFF">
1153:
1154: Body of Document Goes Here
1155:
1156: </body>
1157: </html>
1158: SIMPLECONTENT
1159: return $filecontents;
1160: }
1161:
1162:
1163: sub inserteditinfo {
1164: my ($result,$filecontents)=@_;
1165: $filecontents = &HTML::Entities::encode($filecontents);
1166: # my $editheader='<a href="#editsection">Edit below</a><hr />';
1167: my $buttons=(<<BUTTONS);
1168: <input type="submit" name="attemptclean"
1169: value="Save and then attempt to clean HTML" />
1170: <input type="submit" name="savethisfile" value="Save this" />
1171: <input type="submit" name="viewmode" value="View" />
1172: BUTTONS
1173: my $editfooter=(<<ENDFOOTER);
1174: <hr />
1175: <a name="editsection" />
1176: <form method="post">
1177: <input type="hidden" name="editmode" value="Edit" />
1178: $buttons<br />
1179: <textarea cols="80" rows="40" name="filecont">$filecontents</textarea>
1180: <br />$buttons
1181: <br />
1182: </form>
1183: ENDFOOTER
1184: # $result=~s/(\<body[^\>]*\>)/$1$editheader/is;
1185: $result=~s/(\<\/body\>)/$editfooter/is;
1186: return $result;
1187: }
1188:
1189: sub get_target {
1190: my $viewgrades=&Apache::lonnet::allowed('vgr',$ENV{'request.course.id'});
1191: if ( $ENV{'request.state'} eq 'published') {
1192: if ( defined($ENV{'form.grade_target'})
1193: && ($viewgrades == 'F' )) {
1194: return ($ENV{'form.grade_target'});
1195: } elsif (defined($ENV{'form.grade_target'})) {
1196: if (($ENV{'form.grade_target'} eq 'web') ||
1197: ($ENV{'form.grade_target'} eq 'tex') ) {
1198: return $ENV{'form.grade_target'}
1199: } else {
1200: return 'web';
1201: }
1202: } else {
1203: return 'web';
1204: }
1205: } elsif ($ENV{'request.state'} eq 'construct') {
1206: if ( defined($ENV{'form.grade_target'})) {
1207: return ($ENV{'form.grade_target'});
1208: } else {
1209: return 'web';
1210: }
1211: } else {
1212: return 'web';
1213: }
1214: }
1215:
1216: sub handler {
1217: my $request=shift;
1218:
1219: my $target=&get_target();
1220:
1221: $Apache::lonxml::debug=0;
1222:
1223: if ($ENV{'browser.mathml'}) {
1224: $request->content_type('text/xml');
1225: } else {
1226: $request->content_type('text/html');
1227: }
1228: &Apache::loncommon::no_cache($request);
1229: $request->send_http_header;
1230:
1231: return OK if $request->header_only;
1232:
1233:
1234: my $file=&Apache::lonnet::filelocation("",$request->uri);
1235: #
1236: # Edit action? Save file.
1237: #
1238: unless ($ENV{'request.state'} eq 'published') {
1239: if (($ENV{'form.savethisfile'}) || ($ENV{'form.attemptclean'})) {
1240: &storefile($file,$ENV{'form.filecont'});
1241: }
1242: }
1243: my %mystyle;
1244: my $result = '';
1245: my $filecontents=&Apache::lonnet::getfile($file);
1246: if ($filecontents == -1) {
1247: $result=(<<ENDNOTFOUND);
1248: <html>
1249: <head>
1250: <title>File not found</title>
1251: </head>
1252: <body bgcolor="#FFFFFF">
1253: <b>File not found: $file</b>
1254: </body>
1255: </html>
1256: ENDNOTFOUND
1257: $filecontents='';
1258: if ($ENV{'request.state'} ne 'published') {
1259: $filecontents=&createnewhtml();
1260: $ENV{'form.editmode'}='Edit'; #force edit mode
1261: }
1262: } else {
1263: unless ($ENV{'request.state'} eq 'published') {
1264: if ($ENV{'form.attemptclean'}) {
1265: $filecontents=&htmlclean($filecontents,1);
1266: }
1267: }
1268: if (!$ENV{'form.editmode'} || $ENV{'form.viewmode'}) {
1269: $result = &Apache::lonxml::xmlparse($request,$target,$filecontents,
1270: '',%mystyle);
1271: }
1272: }
1273:
1274: #
1275: # Edit action? Insert editing commands
1276: #
1277: unless ($ENV{'request.state'} eq 'published') {
1278: if ($ENV{'form.editmode'} && (!($ENV{'form.viewmode'}))) {
1279: my $displayfile=$request->uri;
1280: $displayfile=~s/^\/[^\/]*//;
1281: $result='<html><body bgcolor="#FFFFFF"><h3>'.$displayfile.
1282: '</h3></body></html>';
1283: $result=&inserteditinfo($result,$filecontents);
1284: }
1285: }
1286:
1287: writeallows($request->uri);
1288:
1289: $request->print($result);
1290:
1291: return OK;
1292: }
1293:
1294: sub debug {
1295: if ($Apache::lonxml::debug eq 1) {
1296: $|=1;
1297: print("DEBUG:".&HTML::Entities::encode($_[0])."<br />\n");
1298: }
1299: }
1300:
1301: sub error {
1302: if (($Apache::lonxml::debug eq 1) || ($ENV{'request.state'} eq 'construct') ) {
1303: # If printing in construction space, put the error inside <pre></pre>
1304: print "<b>ERROR:</b>".join("\n",@_)."\n";
1305: } else {
1306: print "<b>An Error occured while processing this resource. The instructor has been notified.</b> <br />";
1307: #notify author
1308: &Apache::lonmsg::author_res_msg($ENV{'request.filename'},join('<br />',@_));
1309: #notify course
1310: if ( $ENV{'request.course.id'} ) {
1311: my $users=$ENV{'course.'.$ENV{'request.course.id'}.'.comment.email'};
1312: my $declutter=&Apache::lonnet::declutter($ENV{'request.filename'});
1313: foreach my $user (split /\,/, $users) {
1314: ($user,my $domain) = split /:/, $user;
1315: &Apache::lonmsg::user_normal_msg($user,$domain,
1316: "Error [$declutter]",join('<br />',@_));
1317: }
1318: }
1319:
1320: #FIXME probably shouldn't have me get everything forever.
1321: &Apache::lonmsg::user_normal_msg('albertel','msu',"Error in $ENV{'request.filename'}",join('<br />',@_));
1322: #&Apache::lonmsg::user_normal_msg('albertel','103',"Error in $ENV{'request.filename'}",$_[0]);
1323: }
1324: }
1325:
1326: sub warning {
1327: if ($ENV{'request.state'} eq 'construct') {
1328: print "<b>W</b>ARNING<b>:</b>".join('<br />',@_)."<br />\n";
1329: }
1330: }
1331:
1332: sub get_param {
1333: my ($param,$parstack,$safeeval,$context) = @_;
1334: if ( ! $context ) { $context = -1; }
1335: my $args ='';
1336: if ( $#$parstack > (-2-$context) ) { $args=$$parstack[$context]; }
1337: if ( ! $args ) { return undef; }
1338: if ( $args =~ /my \$$param=\"/ ) {
1339: return &Apache::run::run("{$args;".'return $'.$param.'}',$safeeval); #'
1340: } else {
1341: return undef;
1342: }
1343: }
1344:
1345: sub get_param_var {
1346: my ($param,$parstack,$safeeval,$context) = @_;
1347: if ( ! $context ) { $context = -1; }
1348: my $args ='';
1349: if ( $#$parstack > (-2-$context) ) { $args=$$parstack[$context]; }
1350: if ( $args !~ /my \$$param=\"/ ) { return undef; }
1351: my $value=&Apache::run::run("{$args;".'return $'.$param.'}',$safeeval); #'
1352: if ($value =~ /^[\$\@\%]/) {
1353: return &Apache::run::run("return $value",$safeeval,1);
1354: } else {
1355: return $value;
1356: }
1357: }
1358:
1359: sub register_insert {
1360: my @data = split /\n/, &Apache::lonnet::getfile('/home/httpd/lonTabs/insertlist.tab');
1361: my $i;
1362: my $tagnum=0;
1363: my @order;
1364: for ($i=0;$i < $#data; $i++) {
1365: my $line = $data[$i];
1366: if ( $line =~ /^\#/ || $line =~ /^\s*\n/) { next; }
1367: if ( $line =~ /TABLE/ ) { last; }
1368: my ($tag,$descrip,$color,$function,$show) = split(/,/, $line);
1369: if ($tag) {
1370: $insertlist{"$tagnum.tag"} = $tag;
1371: $insertlist{"$tagnum.description"} = $descrip;
1372: $insertlist{"$tagnum.color"} = $color;
1373: $insertlist{"$tagnum.function"} = $function;
1374: if (!defined($show)) { $show='yes'; }
1375: $insertlist{"$tagnum.show"}= $show;
1376: $insertlist{"$tag.num"}=$tagnum;
1377: $tagnum++;
1378: }
1379: }
1380: $i++; #skipping TABLE line
1381: $tagnum = 0;
1382: for (;$i < $#data;$i++) {
1383: my $line = $data[$i];
1384: my ($mnemonic,@which) = split(/ +/,$line);
1385: my $tag = $insertlist{"$tagnum.tag"};
1386: for (my $j=0;$j <=$#which;$j++) {
1387: if ( $which[$j] eq 'Y' ) {
1388: if ($insertlist{"$j.show"} ne 'no') {
1389: push(@{ $insertlist{"$tag.which"} },$j);
1390: }
1391: }
1392: }
1393: $tagnum++;
1394: }
1395: }
1396:
1397: sub description {
1398: my ($token)=@_;
1399: my $tagnum;
1400: my $tag=$token->[1];
1401: foreach my $namespace (reverse @Apache::lonxml::namespace) {
1402: my $testtag=$namespace.'::'.$tag;
1403: $tagnum=$insertlist{"$testtag.num"};
1404: if (defined($tagnum)) { last; }
1405: }
1406: if (!defined ($tagnum)) { $tagnum=$Apache::lonxml::insertlist{"$tag.num"}; }
1407: return $insertlist{$tagnum.'.description'};
1408: }
1409:
1410: # ----------------------------------------------------------------- whichuser
1411: # returns a list of $symb, $courseid, $domain, $name that is correct for
1412: # calls to lonnet functions for this setup.
1413: # - looks for form.grade_ parameters
1414: sub whichuser {
1415: my ($symb,$courseid,$domain,$name);
1416: if (defined($ENV{'form.grade_symb'})) {
1417: my $tmp_courseid=$ENV{'form.grade_courseid'};
1418: my $allowed=&Apache::lonnet::allowed('mgr',$tmp_courseid);
1419: if ($allowed) {
1420: $symb=$ENV{'form.grade_symb'};
1421: $courseid=$ENV{'form.grade_courseid'};
1422: $domain=$ENV{'form.grade_domain'};
1423: $name=$ENV{'form.grade_username'};
1424: }
1425: } else {
1426: $symb=&Apache::lonnet::symbread();
1427: $courseid=$ENV{'request.course.id'};
1428: $domain=$ENV{'user.domain'};
1429: $name=$ENV{'user.name'};
1430: }
1431: return ($symb,$courseid,$domain,$name);
1432: }
1433:
1434: 1;
1435: __END__
1436:
1437:
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