1: # The LearningOnline Network with CAPA
2: # XML Parser Module
3: #
4: # $Id: lonxml.pm,v 1.278 2003/09/15 19:56:44 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: # 5/26 Gerd Kortemeyer
45: # 5/27 H. K. Ng
46: # 6/2,6/3,6/8,6/9 Gerd Kortemeyer
47: # 6/12,6/13 H. K. Ng
48: # 6/16 Gerd Kortemeyer
49: # 7/27 H. K. Ng
50: # 8/7,8/9,8/10,8/11,8/15,8/16,8/17,8/18,8/20,8/23,8/24 Gerd Kortemeyer
51: # Guy Albertelli
52: # 9/26 Gerd Kortemeyer
53: # Dec Guy Albertelli
54: # YEAR=2002
55: # 1/1 Gerd Kortemeyer
56: # 1/2 Matthew Hall
57: # 1/3 Gerd Kortemeyer
58: #
59:
60: package Apache::lonxml;
61: use vars
62: qw(@pwd @outputstack $redirection $import @extlinks $metamode $evaluate %insertlist @namespace $prevent_entity_encode $errorcount $warningcount);
63: use strict;
64: use HTML::LCParser();
65: use HTML::TreeBuilder();
66: use HTML::Entities();
67: use Safe();
68: use Safe::Hole();
69: use Math::Cephes();
70: use Math::Random();
71: use Opcode();
72: use POSIX qw(strftime);
73:
74:
75: sub register {
76: my ($space,@taglist) = @_;
77: foreach my $temptag (@taglist) {
78: push(@{ $Apache::lonxml::alltags{$temptag} },$space);
79: }
80: }
81:
82: sub deregister {
83: my ($space,@taglist) = @_;
84: foreach my $temptag (@taglist) {
85: my $tempspace = $Apache::lonxml::alltags{$temptag}[-1];
86: if ($tempspace eq $space) {
87: pop(@{ $Apache::lonxml::alltags{$temptag} });
88: }
89: }
90: #&printalltags();
91: }
92:
93: use Apache::Constants qw(:common);
94: use Apache::lontexconvert();
95: use Apache::style();
96: use Apache::run();
97: use Apache::londefdef();
98: use Apache::scripttag();
99: use Apache::edit();
100: use Apache::inputtags();
101: use Apache::outputtags();
102: use Apache::lonnet();
103: use Apache::File();
104: use Apache::loncommon();
105: use Apache::lonfeedback();
106: use Apache::lonmsg();
107: use Apache::loncacc();
108:
109: #================================================== Main subroutine: xmlparse
110: #debugging control, to turn on debugging modify the correct handler
111: $Apache::lonxml::debug=0;
112:
113: # keeps count of the number of warnings and errors generated in a parse
114: $warningcount=0;
115: $errorcount=0;
116:
117: #path to the directory containing the file currently being processed
118: @pwd=();
119:
120: #these two are used for capturing a subset of the output for later processing,
121: #don't touch them directly use &startredirection and &endredirection
122: @outputstack = ();
123: $redirection = 0;
124:
125: #controls wheter the <import> tag actually does
126: $import = 1;
127: @extlinks=();
128:
129: # meta mode is a bit weird only some output is to be turned off
130: #<output> tag turns metamode off (defined in londefdef.pm)
131: $metamode = 0;
132:
133: # turns on and of run::evaluate actually derefencing var refs
134: $evaluate = 1;
135:
136: # data structure for eidt mode, determines what tags can go into what other tags
137: %insertlist=();
138:
139: # stores the list of active tag namespaces
140: @namespace=();
141:
142: # if 0 all high ASCII characters will be encoded into HTML Entities
143: $prevent_entity_encode=0;
144:
145: # has the dynamic menu been updated to know about this resource
146: $Apache::lonxml::registered=0;
147:
148: # a pointer the the Apache request object
149: $Apache::lonxml::request='';
150:
151: # a problem number counter, and check on ether it is used
152: $Apache::lonxml::counter=1;
153: $Apache::lonxml::counter_changed=0;
154:
155: #internal check on whether to look at style defs
156: $Apache::lonxml::usestyle=1;
157:
158: #locations used to store the parameter string for style substitutions
159: $Apache::lonxml::style_values='';
160: $Apache::lonxml::style_end_values='';
161:
162: sub xmlbegin {
163: my $output='';
164: if ($ENV{'browser.mathml'}) {
165: $output='<?xml version="1.0"?>'
166: .'<?xml-stylesheet type="text/css" href="/adm/MathML/mathml.css"?>'
167: .'<!DOCTYPE html SYSTEM "/adm/MathML/mathml.dtd" '
168: .'[<!ENTITY mathns "http://www.w3.org/1998/Math/MathML">]>'
169: .'<html xmlns:math="http://www.w3.org/1998/Math/MathML" '
170: .'xmlns="http://www.w3.org/TR/REC-html40">';
171: } else {
172: $output='<html>';
173: }
174: return $output;
175: }
176:
177: sub xmlend {
178: my $mode='xml';
179: my $status='OPEN';
180: if ($Apache::lonhomework::parsing_a_problem) {
181: $mode='problem';
182: $status=$Apache::inputtags::status[-1];
183: }
184: return &Apache::lonfeedback::list_discussion().'</html>';
185: }
186:
187: sub tokeninputfield {
188: my $defhost=$Apache::lonnet::perlvar{'lonHostID'};
189: $defhost=~tr/a-z/A-Z/;
190: return (<<ENDINPUTFIELD)
191: <script type="text/javascript">
192: function updatetoken() {
193: var comp=new Array;
194: var barcode=unescape(document.tokeninput.barcode.value);
195: comp=barcode.split('*');
196: if (typeof(comp[0])!="undefined") {
197: document.tokeninput.codeone.value=comp[0];
198: }
199: if (typeof(comp[1])!="undefined") {
200: document.tokeninput.codetwo.value=comp[1];
201: }
202: if (typeof(comp[2])!="undefined") {
203: comp[2]=comp[2].toUpperCase();
204: document.tokeninput.codethree.value=comp[2];
205: }
206: document.tokeninput.barcode.value='';
207: }
208: </script>
209: <form method="post" name="tokeninput">
210: <table border="2" bgcolor="#FFFFBB">
211: <tr><th>DocID Checkin</th></tr>
212: <tr><td>
213: <table>
214: <tr>
215: <td>Scan in Barcode</td>
216: <td><input type="text" size="22" name="barcode"
217: onChange="updatetoken()"/></td>
218: </tr>
219: <tr><td><i>or</i> Type in DocID</td>
220: <td>
221: <input type="text" size="5" name="codeone" />
222: <b><font size="+2">*</font></b>
223: <input type="text" size="5" name="codetwo" />
224: <b><font size="+2">*</font></b>
225: <input type="text" size="10" name="codethree" value="$defhost"
226: onChange="this.value=this.value.toUpperCase()" />
227: </td></tr>
228: </table>
229: </td></tr>
230: <tr><td><input type="submit" value="Check in DocID" /></td></tr>
231: </table>
232: </form>
233: ENDINPUTFIELD
234: }
235:
236: sub maketoken {
237: my ($symb,$tuname,$tudom,$tcrsid)=@_;
238: unless ($symb) {
239: $symb=&Apache::lonnet::symbread();
240: }
241: unless ($tuname) {
242: $tuname=$ENV{'user.name'};
243: $tudom=$ENV{'user.domain'};
244: $tcrsid=$ENV{'request.course.id'};
245: }
246:
247: return &Apache::lonnet::checkout($symb,$tuname,$tudom,$tcrsid);
248: }
249:
250: sub printtokenheader {
251: my ($target,$token,$tsymb,$tcrsid,$tudom,$tuname)=@_;
252: unless ($token) { return ''; }
253:
254: my ($symb,$courseid,$domain,$name) = &Apache::lonxml::whichuser();
255: unless ($tsymb) {
256: $tsymb=$symb;
257: }
258: unless ($tuname) {
259: $tuname=$name;
260: $tudom=$domain;
261: $tcrsid=$courseid;
262: }
263:
264: my %reply=&Apache::lonnet::get('environment',
265: ['firstname','middlename','lastname','generation'],
266: $tudom,$tuname);
267: my $plainname=$reply{'firstname'}.' '.
268: $reply{'middlename'}.' '.
269: $reply{'lastname'}.' '.
270: $reply{'generation'};
271:
272: if ($target eq 'web') {
273: my %idhash=&Apache::lonnet::idrget($tudom,($tuname));
274: return
275: '<img align="right" src="/cgi-bin/barcode.png?encode='.$token.'" />'.
276: 'Checked out for '.$plainname.
277: '<br />User: '.$tuname.' at '.$tudom.
278: '<br />ID: '.$idhash{$tuname}.
279: '<br />CourseID: '.$tcrsid.
280: '<br />Course: '.$ENV{'course.'.$tcrsid.'.description'}.
281: '<br />DocID: '.$token.
282: '<br />Time: '.localtime().'<hr />';
283: } else {
284: return $token;
285: }
286: }
287:
288: sub fontsettings() {
289: my $headerstring='';
290: if (($ENV{'browser.os'} eq 'mac') && (!$ENV{'browser.mathml'})) {
291: $headerstring.=
292: '<meta Content-Type="text/html; charset=x-mac-roman">';
293: } elsif (!$ENV{'browser.mathml'} && $ENV{'browser.unicode'}) {
294: $headerstring.=
295: '<meta http-equiv="Content-Type" content="text/html; charset=utf-8" />';
296: }
297: return $headerstring;
298: }
299:
300: sub printalltags {
301: my $temp;
302: foreach $temp (sort keys %Apache::lonxml::alltags) {
303: &Apache::lonxml::debug("$temp -- ".
304: join(',',@{ $Apache::lonxml::alltags{$temp} }));
305: }
306: }
307:
308: sub xmlparse {
309: my ($request,$target,$content_file_string,$safeinit,%style_for_target) = @_;
310:
311: &setup_globals($request,$target);
312: &Apache::inputtags::initialize_inputtags();
313: &Apache::outputtags::initialize_outputtags();
314: &Apache::edit::initialize_edit();
315:
316: #
317: # do we have a course style file?
318: #
319:
320: if ($ENV{'request.course.id'} && $ENV{'request.state'} ne 'construct') {
321: my $bodytext=
322: $ENV{'course.'.$ENV{'request.course.id'}.'.default_xml_style'};
323: if ($bodytext) {
324: my $location=&Apache::lonnet::filelocation('',$bodytext);
325: my $styletext=&Apache::lonnet::getfile($location);
326: if ($styletext ne '-1') {
327: %style_for_target = (%style_for_target,
328: &Apache::style::styleparser($target,$styletext));
329: }
330: }
331: }
332: #&printalltags();
333: my @pars = ();
334: my $pwd=$ENV{'request.filename'};
335: $pwd =~ s:/[^/]*$::;
336: &newparser(\@pars,\$content_file_string,$pwd);
337:
338: my $safeeval = new Safe;
339: my $safehole = new Safe::Hole;
340: &init_safespace($target,$safeeval,$safehole,$safeinit);
341: #-------------------- Redefinition of the target in the case of compound target
342:
343: ($target, my @tenta) = split('&&',$target);
344:
345: my @stack = ();
346: my @parstack = ();
347: &initdepth;
348:
349: my $finaloutput = &inner_xmlparse($target,\@stack,\@parstack,\@pars,
350: $safeeval,\%style_for_target);
351:
352: if ($ENV{'request.uri'}) {
353: &writeallows($ENV{'request.uri'});
354: }
355: if ($Apache::lonxml::counter_changed) { &store_counter() }
356: return $finaloutput;
357: }
358:
359: sub htmlclean {
360: my ($raw,$full)=@_;
361:
362: my $tree = HTML::TreeBuilder->new;
363: $tree->ignore_unknown(0);
364:
365: $tree->parse($raw);
366:
367: my $output= $tree->as_HTML(undef,' ');
368:
369: $output=~s/\<(br|hr|img|meta|allow)(.*?)\>/\<$1$2 \/\>/gis;
370: $output=~s/\<\/(br|hr|img|meta|allow)\>//gis;
371: unless ($full) {
372: $output=~s/\<[\/]*(body|head|html)\>//gis;
373: }
374:
375: $tree = $tree->delete;
376:
377: return $output;
378: }
379:
380: sub latex_special_symbols {
381: my ($string,$where)=@_;
382: if ($where eq 'header') {
383: $string =~ s/(\\|_|\^)/ /g;
384: $string =~ s/(\$|%|\#|&|\{|\})/\\$1/g;
385: $string =~ s/_/ /g;
386: } else {
387: $string=~s/\\ /\\char92 /g;
388: $string=~s/\^/\\char94 /g;
389: $string=~s/\~/\\char126 /g;
390: $string=~s/(&[^A-Za-z\#])/\\$1/g;
391: $string=~s/([^&])\#/$1\\#/g;
392: $string=~s/(\$|_|{|})/\\$1/g;
393: $string=~s/\\char92 /\\texttt{\\char92}/g;
394: $string=~s/(>|<)/\$$1\$/g; #more or less
395: if ($string=~m/\d%/) {$string =~ s/(\d)%/$1\\%/g;} #percent after digit
396: if ($string=~m/\s%/) {$string =~ s/(\s)%/$1\\%/g;} #percent after space
397: if ($string eq '%.') {$string = '\%.';} #percent at the end of statement
398: }
399: return $string;
400: }
401:
402: sub inner_xmlparse {
403: my ($target,$stack,$parstack,$pars,$safeeval,$style_for_target)=@_;
404: my $finaloutput = '';
405: my $result;
406: my $token;
407: my $dontpop=0;
408: while ( $#$pars > -1 ) {
409: while ($token = $$pars['-1']->get_token) {
410: if (($token->[0] eq 'T') || ($token->[0] eq 'C') ) {
411: if ($metamode<1) {
412: my $text=$token->[1];
413: if ($token->[0] eq 'C' && $target eq 'tex') {
414: $text = '';
415: # $text = '%'.$text."\n";
416: }
417: $result.=$text;
418: }
419: } elsif (($token->[0] eq 'D')) {
420: if ($metamode<1 && $target eq 'web') {
421: my $text=$token->[1];
422: $result.=$text;
423: }
424: } elsif ($token->[0] eq 'PI') {
425: if ($metamode<1 && $target eq 'web') {
426: $result=$token->[2];
427: }
428: } elsif ($token->[0] eq 'S') {
429: # add tag to stack
430: push (@$stack,$token->[1]);
431: # add parameters list to another stack
432: push (@$parstack,&parstring($token));
433: &increasedepth($token);
434: if ($Apache::lonxml::usestyle &&
435: exists($$style_for_target{$token->[1]})) {
436: $Apache::lonxml::usestyle=0;
437: my $string=$$style_for_target{$token->[1]}.
438: '<LONCAPA_INTERNAL_TURN_STYLE_ON />';
439: &Apache::lonxml::newparser($pars,\$string);
440: $Apache::lonxml::style_values=$$parstack[-1];
441: $Apache::lonxml::style_end_values=$$parstack[-1];
442: } else {
443: $result = &callsub("start_$token->[1]", $target, $token, $stack,
444: $parstack, $pars, $safeeval, $style_for_target);
445: }
446: } elsif ($token->[0] eq 'E') {
447: if ($Apache::lonxml::usestyle &&
448: exists($$style_for_target{'/'."$token->[1]"})) {
449: $Apache::lonxml::usestyle=0;
450: my $string=$$style_for_target{'/'.$token->[1]}.
451: '<LONCAPA_INTERNAL_TURN_STYLE_ON end="'.$token->[1].'" />';
452: &Apache::lonxml::newparser($pars,\$string);
453: $Apache::lonxml::style_values=$Apache::lonxml::style_end_values;
454: $Apache::lonxml::style_end_values='';
455: $dontpop=1;
456: } else {
457: #clear out any tags that didn't end
458: while ($token->[1] ne $$stack['-1'] && ($#$stack > -1)) {
459: my $lasttag=$$stack[-1];
460: if ($token->[1] =~ /^$lasttag$/i) {
461: &Apache::lonxml::warning('Using tag </'.$token->[1].'> on line '.$token->[3].' as end tag to <'.$$stack[-1].'>');
462: last;
463: } else {
464: &Apache::lonxml::warning('Found tag </'.$token->[1].'> on line '.$token->[3].' when looking for </'.$$stack[-1].'> in file');
465: &end_tag($stack,$parstack,$token);
466: }
467: }
468: $result = &callsub("end_$token->[1]", $target, $token, $stack,
469: $parstack, $pars,$safeeval, $style_for_target);
470: }
471: } else {
472: &Apache::lonxml::error("Unknown token event :$token->[0]:$token->[1]:");
473: }
474: #evaluate variable refs in result
475: if ($result ne "") {
476: my $extras;
477: if (!$Apache::lonxml::usestyle) {
478: $extras=$Apache::lonxml::style_values;
479: }
480: if ( $#$parstack > -1 ) {
481: $result=&Apache::run::evaluate($result,$safeeval,$extras.$$parstack[-1]);
482: } else {
483: $result= &Apache::run::evaluate($result,$safeeval,$extras);
484: }
485: }
486: if (($token->[0] eq 'T') || ($token->[0] eq 'C') || ($token->[0] eq 'D') ) {
487: #Style file definitions should be correct
488: if ($target eq 'tex' && ($Apache::lonxml::usestyle)) {
489: $result=&latex_special_symbols($result);
490: }
491: }
492:
493: # Encode any high ASCII characters
494: if (!$Apache::lonxml::prevent_entity_encode) {
495: $result=&HTML::Entities::encode($result,"\200-\377");
496: }
497: if ($Apache::lonxml::redirection) {
498: $Apache::lonxml::outputstack['-1'] .= $result;
499: } else {
500: $finaloutput.=$result;
501: }
502: $result = '';
503:
504: if ($token->[0] eq 'E' && !$dontpop) {
505: &end_tag($stack,$parstack,$token);
506: }
507: $dontpop=0;
508: }
509: if ($#$pars > -1) {
510: pop @$pars;
511: pop @Apache::lonxml::pwd;
512: }
513: }
514:
515: # if ($target eq 'meta') {
516: # $finaloutput.=&endredirection;
517: # }
518:
519:
520: if (($ENV{'QUERY_STRING'}) && ($target eq 'web')) {
521: $finaloutput=&afterburn($finaloutput);
522: }
523: return $finaloutput;
524: }
525:
526: sub callsub {
527: my ($sub,$target,$token,$tagstack,$parstack,$parser,$safeeval,$style)=@_;
528: my $currentstring='';
529: my $nodefault;
530: {
531: my $sub1;
532: no strict 'refs';
533: my $tag=$token->[1];
534: # get utterly rid of extended html tags
535: if ($tag=~/^x\-/i) { return ''; }
536: my $space=$Apache::lonxml::alltags{$tag}[-1];
537: if (!$space) {
538: $tag=~tr/A-Z/a-z/;
539: $sub=~tr/A-Z/a-z/;
540: $space=$Apache::lonxml::alltags{$tag}[-1]
541: }
542:
543: my $deleted=0;
544: $Apache::lonxml::curdepth=join('_',@Apache::lonxml::depthcounter);
545: if (($token->[0] eq 'S') && ($target eq 'modified')) {
546: $deleted=&Apache::edit::handle_delete($space,$target,$token,$tagstack,
547: $parstack,$parser,$safeeval,
548: $style);
549: }
550: if (!$deleted) {
551: if ($space) {
552: #&Apache::lonxml::debug("Calling sub $sub in $space $metamode");
553: $sub1="$space\:\:$sub";
554: ($currentstring,$nodefault) = &$sub1($target,$token,$tagstack,
555: $parstack,$parser,$safeeval,
556: $style);
557: } else {
558: #&Apache::lonxml::debug("NOT Calling sub $sub in $space $metamode");
559: if ($metamode <1) {
560: if (defined($token->[4]) && ($metamode < 1)) {
561: $currentstring = $token->[4];
562: } else {
563: $currentstring = $token->[2];
564: }
565: }
566: }
567: # &Apache::lonxml::debug("nodefalt:$nodefault:");
568: if ($currentstring eq '' && $nodefault eq '') {
569: if ($target eq 'edit') {
570: #&Apache::lonxml::debug("doing default edit for $token->[1]");
571: if ($token->[0] eq 'S') {
572: $currentstring = &Apache::edit::tag_start($target,$token);
573: } elsif ($token->[0] eq 'E') {
574: $currentstring = &Apache::edit::tag_end($target,$token);
575: }
576: } elsif ($target eq 'modified') {
577: if ($token->[0] eq 'S') {
578: $currentstring = $token->[4];
579: $currentstring.=&Apache::edit::handle_insert();
580: } elsif ($token->[0] eq 'E') {
581: $currentstring = $token->[2];
582: $currentstring.=&Apache::edit::handle_insertafter($token->[1]);
583: } else {
584: $currentstring = $token->[2];
585: }
586: }
587: }
588: }
589: use strict 'refs';
590: }
591: return $currentstring;
592: }
593:
594: sub setup_globals {
595: my ($request,$target)=@_;
596: $Apache::lonxml::request=$request;
597: $Apache::lonxml::registered = 0;
598: $errorcount=0;
599: $warningcount=0;
600: $Apache::lonxml::default_homework_loaded=0;
601: $Apache::lonxml::usestyle=1;
602: &init_counter();
603: @Apache::lonxml::pwd=();
604: @Apache::lonxml::extlinks=();
605: if ($target eq 'meta') {
606: $Apache::lonxml::redirection = 0;
607: $Apache::lonxml::metamode = 1;
608: $Apache::lonxml::evaluate = 1;
609: $Apache::lonxml::import = 0;
610: } elsif ($target eq 'answer') {
611: $Apache::lonxml::redirection = 0;
612: $Apache::lonxml::metamode = 1;
613: $Apache::lonxml::evaluate = 1;
614: $Apache::lonxml::import = 1;
615: } elsif ($target eq 'grade') {
616: &startredirection;
617: $Apache::lonxml::metamode = 0;
618: $Apache::lonxml::evaluate = 1;
619: $Apache::lonxml::import = 1;
620: } elsif ($target eq 'modified') {
621: $Apache::lonxml::redirection = 0;
622: $Apache::lonxml::metamode = 0;
623: $Apache::lonxml::evaluate = 0;
624: $Apache::lonxml::import = 0;
625: } elsif ($target eq 'edit') {
626: $Apache::lonxml::redirection = 0;
627: $Apache::lonxml::metamode = 0;
628: $Apache::lonxml::evaluate = 0;
629: $Apache::lonxml::import = 0;
630: } elsif ($target eq 'analyze') {
631: $Apache::lonxml::redirection = 0;
632: $Apache::lonxml::metamode = 0;
633: $Apache::lonxml::evaluate = 1;
634: $Apache::lonxml::import = 1;
635: } else {
636: $Apache::lonxml::redirection = 0;
637: $Apache::lonxml::metamode = 0;
638: $Apache::lonxml::evaluate = 1;
639: $Apache::lonxml::import = 1;
640: }
641: }
642:
643: sub init_safespace {
644: my ($target,$safeeval,$safehole,$safeinit) = @_;
645: $safeeval->permit("entereval");
646: $safeeval->permit(":base_math");
647: $safeeval->permit("sort");
648: $safeeval->deny(":base_io");
649: $safehole->wrap(\&Apache::scripttag::xmlparse,$safeeval,'&xmlparse');
650: $safehole->wrap(\&Apache::outputtags::multipart,$safeeval,'&multipart');
651: $safehole->wrap(\&Apache::lonnet::EXT,$safeeval,'&EXT');
652:
653: $safehole->wrap(\&Math::Cephes::asin,$safeeval,'&asin');
654: $safehole->wrap(\&Math::Cephes::acos,$safeeval,'&acos');
655: $safehole->wrap(\&Math::Cephes::atan,$safeeval,'&atan');
656: $safehole->wrap(\&Math::Cephes::sinh,$safeeval,'&sinh');
657: $safehole->wrap(\&Math::Cephes::cosh,$safeeval,'&cosh');
658: $safehole->wrap(\&Math::Cephes::tanh,$safeeval,'&tanh');
659: $safehole->wrap(\&Math::Cephes::asinh,$safeeval,'&asinh');
660: $safehole->wrap(\&Math::Cephes::acosh,$safeeval,'&acosh');
661: $safehole->wrap(\&Math::Cephes::atanh,$safeeval,'&atanh');
662: $safehole->wrap(\&Math::Cephes::erf,$safeeval,'&erf');
663: $safehole->wrap(\&Math::Cephes::erfc,$safeeval,'&erfc');
664: $safehole->wrap(\&Math::Cephes::j0,$safeeval,'&j0');
665: $safehole->wrap(\&Math::Cephes::j1,$safeeval,'&j1');
666: $safehole->wrap(\&Math::Cephes::jn,$safeeval,'&jn');
667: $safehole->wrap(\&Math::Cephes::jv,$safeeval,'&jv');
668: $safehole->wrap(\&Math::Cephes::y0,$safeeval,'&y0');
669: $safehole->wrap(\&Math::Cephes::y1,$safeeval,'&y1');
670: $safehole->wrap(\&Math::Cephes::yn,$safeeval,'&yn');
671: $safehole->wrap(\&Math::Cephes::yv,$safeeval,'&yv');
672:
673: $safehole->wrap(\&Math::Cephes::bdtr ,$safeeval,'&bdtr' );
674: $safehole->wrap(\&Math::Cephes::bdtrc ,$safeeval,'&bdtrc' );
675: $safehole->wrap(\&Math::Cephes::bdtri ,$safeeval,'&bdtri' );
676: $safehole->wrap(\&Math::Cephes::btdtr ,$safeeval,'&btdtr' );
677: $safehole->wrap(\&Math::Cephes::chdtr ,$safeeval,'&chdtr' );
678: $safehole->wrap(\&Math::Cephes::chdtrc,$safeeval,'&chdtrc');
679: $safehole->wrap(\&Math::Cephes::chdtri,$safeeval,'&chdtri');
680: $safehole->wrap(\&Math::Cephes::fdtr ,$safeeval,'&fdtr' );
681: $safehole->wrap(\&Math::Cephes::fdtrc ,$safeeval,'&fdtrc' );
682: $safehole->wrap(\&Math::Cephes::fdtri ,$safeeval,'&fdtri' );
683: $safehole->wrap(\&Math::Cephes::gdtr ,$safeeval,'&gdtr' );
684: $safehole->wrap(\&Math::Cephes::gdtrc ,$safeeval,'&gdtrc' );
685: $safehole->wrap(\&Math::Cephes::nbdtr ,$safeeval,'&nbdtr' );
686: $safehole->wrap(\&Math::Cephes::nbdtrc,$safeeval,'&nbdtrc');
687: $safehole->wrap(\&Math::Cephes::nbdtri,$safeeval,'&nbdtri');
688: $safehole->wrap(\&Math::Cephes::ndtr ,$safeeval,'&ndtr' );
689: $safehole->wrap(\&Math::Cephes::ndtri ,$safeeval,'&ndtri' );
690: $safehole->wrap(\&Math::Cephes::pdtr ,$safeeval,'&pdtr' );
691: $safehole->wrap(\&Math::Cephes::pdtrc ,$safeeval,'&pdtrc' );
692: $safehole->wrap(\&Math::Cephes::pdtri ,$safeeval,'&pdtri' );
693: $safehole->wrap(\&Math::Cephes::stdtr ,$safeeval,'&stdtr' );
694: $safehole->wrap(\&Math::Cephes::stdtri,$safeeval,'&stdtri');
695:
696: # $safehole->wrap(\&Math::Cephes::new_fract,$safeeval,'&new_fract');
697: # $safehole->wrap(\&Math::Cephes::radd,$safeeval,'&radd');
698: # $safehole->wrap(\&Math::Cephes::rsub,$safeeval,'&rsub');
699: # $safehole->wrap(\&Math::Cephes::rmul,$safeeval,'&rmul');
700: # $safehole->wrap(\&Math::Cephes::rdiv,$safeeval,'&rdiv');
701: # $safehole->wrap(\&Math::Cephes::euclid,$safeeval,'&euclid');
702:
703: $safehole->wrap(\&Math::Random::random_beta,$safeeval,'&math_random_beta');
704: $safehole->wrap(\&Math::Random::random_chi_square,$safeeval,'&math_random_chi_square');
705: $safehole->wrap(\&Math::Random::random_exponential,$safeeval,'&math_random_exponential');
706: $safehole->wrap(\&Math::Random::random_f,$safeeval,'&math_random_f');
707: $safehole->wrap(\&Math::Random::random_gamma,$safeeval,'&math_random_gamma');
708: $safehole->wrap(\&Math::Random::random_multivariate_normal,$safeeval,'&math_random_multivariate_normal');
709: $safehole->wrap(\&Math::Random::random_multinomial,$safeeval,'&math_random_multinomial');
710: $safehole->wrap(\&Math::Random::random_noncentral_chi_square,$safeeval,'&math_random_noncentral_chi_square');
711: $safehole->wrap(\&Math::Random::random_noncentral_f,$safeeval,'&math_random_noncentral_f');
712: $safehole->wrap(\&Math::Random::random_normal,$safeeval,'&math_random_normal');
713: $safehole->wrap(\&Math::Random::random_permutation,$safeeval,'&math_random_permutation');
714: $safehole->wrap(\&Math::Random::random_permuted_index,$safeeval,'&math_random_permuted_index');
715: $safehole->wrap(\&Math::Random::random_uniform,$safeeval,'&math_random_uniform');
716: $safehole->wrap(\&Math::Random::random_poisson,$safeeval,'&math_random_poisson');
717: $safehole->wrap(\&Math::Random::random_uniform_integer,$safeeval,'&math_random_uniform_integer');
718: $safehole->wrap(\&Math::Random::random_negative_binomial,$safeeval,'&math_random_negative_binomial');
719: $safehole->wrap(\&Math::Random::random_binomial,$safeeval,'&math_random_binomial');
720: $safehole->wrap(\&Math::Random::random_seed_from_phrase,$safeeval,'&random_seed_from_phrase');
721: $safehole->wrap(\&Math::Random::random_set_seed_from_phrase,$safeeval,'&random_set_seed_from_phrase');
722: $safehole->wrap(\&Math::Random::random_get_seed,$safeeval,'&random_get_seed');
723: $safehole->wrap(\&Math::Random::random_set_seed,$safeeval,'&random_set_seed');
724:
725: #need to inspect this class of ops
726: # $safeeval->deny(":base_orig");
727: $safeinit .= ';$external::target="'.$target.'";';
728: my $rndseed;
729: my ($symb,$courseid,$domain,$name) = &Apache::lonxml::whichuser();
730: $rndseed=&Apache::lonnet::rndseed($symb,$courseid,$domain,$name);
731: $safeinit .= ';$external::randomseed='.$rndseed.';';
732: &Apache::lonxml::debug("Setting rndseed to $rndseed");
733: &Apache::run::run($safeinit,$safeeval);
734: }
735:
736: sub default_homework_load {
737: my ($safeeval)=@_;
738: &Apache::lonxml::debug('Loading default_homework');
739: my $default=&Apache::lonnet::getfile('/home/httpd/html/res/adm/includes/default_homework.lcpm');
740: if ($default eq -1) {
741: &Apache::lonxml::error("<b>Unable to find <i>default_homework.lcpm</i></b>");
742: } else {
743: &Apache::run::run($default,$safeeval);
744: $Apache::lonxml::default_homework_loaded=1;
745: }
746: }
747:
748: sub startredirection {
749: $Apache::lonxml::redirection++;
750: push (@Apache::lonxml::outputstack, '');
751: }
752:
753: sub endredirection {
754: if (!$Apache::lonxml::redirection) {
755: &Apache::lonxml::error("Endredirection was called, before a startredirection, perhaps you have unbalanced tags. Some debuging information:".join ":",caller);
756: return '';
757: }
758: $Apache::lonxml::redirection--;
759: pop @Apache::lonxml::outputstack;
760: }
761:
762: sub end_tag {
763: my ($tagstack,$parstack,$token)=@_;
764: pop(@$tagstack);
765: pop(@$parstack);
766: &decreasedepth($token);
767: }
768:
769: sub initdepth {
770: @Apache::lonxml::depthcounter=();
771: $Apache::lonxml::depth=-1;
772: $Apache::lonxml::olddepth=-1;
773: }
774:
775: sub increasedepth {
776: my ($token) = @_;
777: $Apache::lonxml::depth++;
778: $Apache::lonxml::depthcounter[$Apache::lonxml::depth]++;
779: if ($Apache::lonxml::depthcounter[$Apache::lonxml::depth]==1) {
780: $Apache::lonxml::olddepth=$Apache::lonxml::depth;
781: }
782: my $curdepth=join('_',@Apache::lonxml::depthcounter);
783: &Apache::lonxml::debug("s $Apache::lonxml::depth : $Apache::lonxml::olddepth : $curdepth : $token->[1]\n");
784: #print "<br />s $Apache::lonxml::depth : $Apache::lonxml::olddepth : $curdepth : $token->[1]\n";
785: }
786:
787: sub decreasedepth {
788: my ($token) = @_;
789: $Apache::lonxml::depth--;
790: if ($Apache::lonxml::depth<$Apache::lonxml::olddepth-1) {
791: $#Apache::lonxml::depthcounter--;
792: $Apache::lonxml::olddepth=$Apache::lonxml::depth+1;
793: }
794: if ( $Apache::lonxml::depth < -1) {
795: &Apache::lonxml::warning("Missing tags, unable to properly run file.");
796: $Apache::lonxml::depth='-1';
797: }
798: my $curdepth=join('_',@Apache::lonxml::depthcounter);
799: &Apache::lonxml::debug("e $Apache::lonxml::depth : $Apache::lonxml::olddepth : $token->[1] : $curdepth\n");
800: #print "<br />e $Apache::lonxml::depth : $Apache::lonxml::olddepth : $token->[1] : $curdepth\n";
801: }
802:
803: sub get_all_text_unbalanced {
804: #there is a copy of this in lonpublisher.pm
805: my($tag,$pars)= @_;
806: my $token;
807: my $result='';
808: $tag='<'.$tag.'>';
809: while ($token = $$pars[-1]->get_token) {
810: if (($token->[0] eq 'T')||($token->[0] eq 'C')||($token->[0] eq 'D')) {
811: $result.=$token->[1];
812: } elsif ($token->[0] eq 'PI') {
813: $result.=$token->[2];
814: } elsif ($token->[0] eq 'S') {
815: $result.=$token->[4];
816: } elsif ($token->[0] eq 'E') {
817: $result.=$token->[2];
818: }
819: if ($result =~ /(.*)\Q$tag\E(.*)/s) {
820: &Apache::lonxml::debug('Got a winner with leftovers ::'.$2);
821: &Apache::lonxml::debug('Result is :'.$1);
822: $result=$1;
823: my $redo=$tag.$2;
824: &Apache::lonxml::newparser($pars,\$redo);
825: last;
826: }
827: }
828: return $result
829: }
830:
831: sub increment_counter {
832: my ($increment) = @_;
833: if (defined($increment) && $increment gt 0) {
834: $Apache::lonxml::counter+=$increment;
835: } else {
836: $Apache::lonxml::counter++;
837: }
838: $Apache::lonxml::counter_changed=1;
839: }
840:
841: sub init_counter {
842: if (defined($ENV{'form.counter'})) {
843: $Apache::lonxml::counter=$ENV{'form.counter'};
844: $Apache::lonxml::counter_changed=0;
845: } else {
846: $Apache::lonxml::counter=1;
847: $Apache::lonxml::counter_changed=1;
848: }
849: }
850:
851: sub store_counter {
852: &Apache::lonnet::appenv(('form.counter' => $Apache::lonxml::counter));
853: return '';
854: }
855:
856: sub get_all_text {
857: my($tag,$pars,$style)= @_;
858: &Apache::lonxml::debug("Got a ".ref($pars));
859: my $gotfullstack=1;
860: if (ref($pars) ne 'ARRAY') {
861: $gotfullstack=0;
862: $pars=[$pars];
863: }
864: &Apache::lonxml::debug("Got a ".ref($style));
865: if (ref($style) ne 'HASH') {
866: $style={};
867: } else {
868: &Apache::lonhomework::showhash(%$style);
869: }
870: my $depth=0;
871: my $token;
872: my $result='';
873: if ( $tag =~ m:^/: ) {
874: my $tag=substr($tag,1);
875: #&Apache::lonxml::debug("have:$tag:");
876: my $top_empty=0;
877: while (($depth >=0) && ($#$pars > -1) && (!$top_empty)) {
878: while (($depth >=0) && ($token = $$pars[-1]->get_token)) {
879: #&Apache::lonxml::debug("e token:$token->[0]:$depth:$token->[1]:".$#$pars.":".$#Apache::lonxml::pwd);
880: if (($token->[0] eq 'T')||($token->[0] eq 'C')||($token->[0] eq 'D')) {
881: $result.=$token->[1];
882: } elsif ($token->[0] eq 'PI') {
883: $result.=$token->[2];
884: } elsif ($token->[0] eq 'S') {
885: if ($token->[1] =~ /^$tag$/i) { $depth++; }
886: if ($token->[1] =~ /^LONCAPA_INTERNAL_TURN_STYLE_ON$/i) { $Apache::lonxml::usestyle=1; }
887: if ($token->[1] =~ /^LONCAPA_INTERNAL_TURN_STYLE_OFF$/i) { $Apache::lonxml::usestyle=0; }
888: $result.=$token->[4];
889: } elsif ($token->[0] eq 'E') {
890: if ( $token->[1] =~ /^$tag$/i) { $depth--; }
891: #skip sending back the last end tag
892: if ($depth == 0 && exists($$style{'/'.$token->[1]})) {
893: my $string=
894: '<LONCAPA_INTERNAL_TURN_STYLE_OFF end="yes" />'.
895: $$style{'/'.$token->[1]}.
896: $token->[2].
897: '<LONCAPA_INTERNAL_TURN_STYLE_ON />';
898: &Apache::lonxml::newparser($pars,\$string);
899: #&Apache::lonxml::debug("reParsing $string");
900: next;
901: }
902: if ($depth > -1) {
903: $result.=$token->[2];
904: } else {
905: $$pars[-1]->unget_token($token);
906: }
907: }
908: }
909: if (($depth >=0) && ($#$pars == 0) ) { $top_empty=1; }
910: if (($depth >=0) && ($#$pars > 0) ) {
911: pop(@$pars);
912: pop(@Apache::lonxml::pwd);
913: }
914: }
915: if ($top_empty && $depth >= 0) {
916: #never found the end tag ran out of text, throw error send back blank
917: &error('Never found end tag for <'.$tag.
918: '> current string <pre>'.
919: &HTML::Entities::encode($result).
920: '</pre>');
921: if ($gotfullstack) {
922: my $newstring='</'.$tag.'>'.$result;
923: &Apache::lonxml::newparser($pars,\$newstring);
924: }
925: $result='';
926: }
927: } else {
928: while ($#$pars > -1) {
929: while ($token = $$pars[-1]->get_token) {
930: #&Apache::lonxml::debug("s token:$token->[0]:$depth:$token->[1]");
931: if (($token->[0] eq 'T')||($token->[0] eq 'C')||
932: ($token->[0] eq 'D')) {
933: $result.=$token->[1];
934: } elsif ($token->[0] eq 'PI') {
935: $result.=$token->[2];
936: } elsif ($token->[0] eq 'S') {
937: if ( $token->[1] =~ /^$tag$/i) {
938: $$pars[-1]->unget_token($token); last;
939: } else {
940: $result.=$token->[4];
941: }
942: if ($token->[1] =~ /^LONCAPA_INTERNAL_TURN_STYLE_ON$/i) { $Apache::lonxml::usestyle=1; }
943: if ($token->[1] =~ /^LONCAPA_INTERNAL_TURN_STYLE_OFF$/i) { $Apache::lonxml::usestyle=0; }
944: } elsif ($token->[0] eq 'E') {
945: $result.=$token->[2];
946: }
947: }
948: if (($#$pars > 0) ) {
949: pop(@$pars);
950: pop(@Apache::lonxml::pwd);
951: } else { last; }
952: }
953: }
954: #&Apache::lonxml::debug("Exit:$result:");
955: return $result
956: }
957:
958: sub newparser {
959: my ($parser,$contentref,$dir) = @_;
960: push (@$parser,HTML::LCParser->new($contentref));
961: $$parser['-1']->xml_mode('1');
962: if ( $dir eq '' ) {
963: push (@Apache::lonxml::pwd, $Apache::lonxml::pwd[$#Apache::lonxml::pwd]);
964: } else {
965: push (@Apache::lonxml::pwd, $dir);
966: }
967: }
968:
969: sub parstring {
970: my ($token) = @_;
971: my $temp='';
972: foreach (@{$token->[3]}) {
973: unless ($_=~/\W/) {
974: my $val=$token->[2]->{$_};
975: $val =~ s/([\%\@\\\"\'])/\\$1/g;
976: #if ($val =~ m/^[\%\@]/) { $val="\\".$val; }
977: $temp .= "my \$$_=\"$val\";";
978: }
979: }
980: return $temp;
981: }
982:
983: sub writeallows {
984: unless ($#extlinks>=0) { return; }
985: my $thisurl='/res/'.&Apache::lonnet::declutter(shift);
986: if ($ENV{'httpref.'.$thisurl}) {
987: $thisurl=$ENV{'httpref.'.$thisurl};
988: }
989: my $thisdir=$thisurl;
990: $thisdir=~s/\/[^\/]+$//;
991: my %httpref=();
992: foreach (@extlinks) {
993: $httpref{'httpref.'.
994: &Apache::lonnet::hreflocation($thisdir,$_)}=$thisurl;
995: }
996: @extlinks=();
997: &Apache::lonnet::appenv(%httpref);
998: }
999:
1000: #
1001: # Afterburner handles anchors, highlights and links
1002: #
1003: sub afterburn {
1004: my $result=shift;
1005: &Apache::loncommon::get_unprocessed_cgi($ENV{'QUERY_STRING'},
1006: ['highlight','anchor','link']);
1007: if ($ENV{'form.highlight'}) {
1008: foreach (split(/\,/,$ENV{'form.highlight'})) {
1009: my $anchorname=$_;
1010: my $matchthis=$anchorname;
1011: $matchthis=~s/\_+/\\s\+/g;
1012: $result=~s/($matchthis)/\<font color=\"red\"\>$1\<\/font\>/gs;
1013: }
1014: }
1015: if ($ENV{'form.link'}) {
1016: foreach (split(/\,/,$ENV{'form.link'})) {
1017: my ($anchorname,$linkurl)=split(/\>/,$_);
1018: my $matchthis=$anchorname;
1019: $matchthis=~s/\_+/\\s\+/g;
1020: $result=~s/($matchthis)/\<a href=\"$linkurl\"\>$1\<\/a\>/gs;
1021: }
1022: }
1023: if ($ENV{'form.anchor'}) {
1024: my $anchorname=$ENV{'form.anchor'};
1025: my $matchthis=$anchorname;
1026: $matchthis=~s/\_+/\\s\+/g;
1027: $result=~s/($matchthis)/\<a name=\"$anchorname\"\>$1\<\/a\>/s;
1028: $result.=(<<"ENDSCRIPT");
1029: <script type="text/javascript">
1030: document.location.hash='$anchorname';
1031: </script>
1032: ENDSCRIPT
1033: }
1034: return $result;
1035: }
1036:
1037: sub storefile {
1038: my ($file,$contents)=@_;
1039: if (my $fh=Apache::File->new('>'.$file)) {
1040: print $fh $contents;
1041: $fh->close();
1042: return 1;
1043: } else {
1044: &warning("Unable to save file $file");
1045: return 0;
1046: }
1047: }
1048:
1049: sub createnewhtml {
1050: my $filecontents=(<<SIMPLECONTENT);
1051: <html>
1052: <head>
1053: <title>
1054: Title of Document Goes Here
1055: </title>
1056: </head>
1057: <body bgcolor="#FFFFFF">
1058:
1059: Body of Document Goes Here
1060:
1061: </body>
1062: </html>
1063: SIMPLECONTENT
1064: return $filecontents;
1065: }
1066:
1067: sub createnewsty {
1068: my $filecontents=(<<SIMPLECONTENT);
1069: <definetag name="">
1070: <render>
1071: <web></web>
1072: <tex></tex>
1073: </render>
1074: </definetag>
1075: SIMPLECONTENT
1076: return $filecontents;
1077: }
1078:
1079:
1080: sub inserteditinfo {
1081: my ($result,$filecontents,$filetype)=@_;
1082: $filecontents = &HTML::Entities::encode($filecontents);
1083: # my $editheader='<a href="#editsection">Edit below</a><hr />';
1084: my $xml_help = '';
1085: if ($filetype eq 'html') {
1086: $xml_help=Apache::loncommon::helpLatexCheatsheet();
1087: }
1088: my $cleanbut = '';
1089: if ($filetype eq 'html') {
1090: $cleanbut='<input type="submit" name="attemptclean"
1091: value="Save and then attempt to clean HTML" />';
1092: }
1093: my $titledisplay=&display_title();
1094: my $buttons=(<<BUTTONS);
1095: $cleanbut
1096: <input type="submit" name="savethisfile" value="Save this" />
1097: <input type="submit" name="viewmode" value="View" />
1098: BUTTONS
1099: my $editfooter=(<<ENDFOOTER);
1100: <hr />
1101: <a name="editsection" />
1102: <form method="post">
1103: $xml_help
1104: <input type="hidden" name="editmode" value="Edit" />
1105: $buttons<br />
1106: <textarea cols="80" rows="40" name="filecont">$filecontents</textarea>
1107: <br />$buttons
1108: <br />
1109: </form>
1110: $titledisplay
1111: ENDFOOTER
1112: # $result=~s/(\<body[^\>]*\>)/$1$editheader/is;
1113: $result=~s/(\<\/body\>)/$editfooter/is;
1114: return $result;
1115: }
1116:
1117: sub get_target {
1118: my $viewgrades=&Apache::lonnet::allowed('vgr',$ENV{'request.course.id'});
1119: if ( $ENV{'request.state'} eq 'published') {
1120: if ( defined($ENV{'form.grade_target'})
1121: && ($viewgrades == 'F' )) {
1122: return ($ENV{'form.grade_target'});
1123: } elsif (defined($ENV{'form.grade_target'})) {
1124: if (($ENV{'form.grade_target'} eq 'web') ||
1125: ($ENV{'form.grade_target'} eq 'tex') ) {
1126: return $ENV{'form.grade_target'}
1127: } else {
1128: return 'web';
1129: }
1130: } else {
1131: return 'web';
1132: }
1133: } elsif ($ENV{'request.state'} eq 'construct') {
1134: if ( defined($ENV{'form.grade_target'})) {
1135: return ($ENV{'form.grade_target'});
1136: } else {
1137: return 'web';
1138: }
1139: } else {
1140: return 'web';
1141: }
1142: }
1143:
1144: sub handler {
1145: my $request=shift;
1146:
1147: my $target=&get_target();
1148:
1149: $Apache::lonxml::debug=$ENV{'user.debug'};
1150:
1151: if ($ENV{'browser.mathml'}) {
1152: $request->content_type('text/xml');
1153: } else {
1154: $request->content_type('text/html');
1155: }
1156: &Apache::loncommon::no_cache($request);
1157: $request->send_http_header;
1158:
1159: return OK if $request->header_only;
1160:
1161:
1162: my $file=&Apache::lonnet::filelocation("",$request->uri);
1163: my $filetype;
1164: if ($file =~ /\.sty$/) {
1165: $filetype='sty';
1166: } else {
1167: $filetype='html';
1168: }
1169: #
1170: # Edit action? Save file.
1171: #
1172: unless ($ENV{'request.state'} eq 'published') {
1173: if (($ENV{'form.savethisfile'}) || ($ENV{'form.attemptclean'})) {
1174: if (&storefile($file,$ENV{'form.filecont'})) {
1175: $request->print("<font COLOR=\"#0000FF\">Updated: ". strftime("%d %b %H:%M:%S",localtime())." </font>");
1176: }
1177: }
1178: }
1179: my %mystyle;
1180: my $result = '';
1181: my $filecontents=&Apache::lonnet::getfile($file);
1182: if ($filecontents eq -1) {
1183: $result=(<<ENDNOTFOUND);
1184: <html>
1185: <head>
1186: <title>File not found</title>
1187: </head>
1188: <body bgcolor="#FFFFFF">
1189: <b>File not found: $file</b>
1190: </body>
1191: </html>
1192: ENDNOTFOUND
1193: $filecontents='';
1194: if ($ENV{'request.state'} ne 'published') {
1195: if ($filetype eq 'sty') {
1196: $filecontents=&createnewsty();
1197: } else {
1198: $filecontents=&createnewhtml();
1199: }
1200: $ENV{'form.editmode'}='Edit'; #force edit mode
1201: }
1202: } else {
1203: unless ($ENV{'request.state'} eq 'published') {
1204: if ($ENV{'form.attemptclean'}) {
1205: $filecontents=&htmlclean($filecontents,1);
1206: }
1207: #
1208: # we are in construction space, see if edit mode forced
1209: &Apache::loncommon::get_unprocessed_cgi
1210: ($ENV{'QUERY_STRING'},['editmode']);
1211: }
1212: if (!$ENV{'form.editmode'} || $ENV{'form.viewmode'}) {
1213: $result = &Apache::lonxml::xmlparse($request,$target,$filecontents,
1214: '',%mystyle);
1215: }
1216: }
1217:
1218: #
1219: # Edit action? Insert editing commands
1220: #
1221: unless ($ENV{'request.state'} eq 'published') {
1222: if ($ENV{'form.editmode'} && (!($ENV{'form.viewmode'}))) {
1223: my $displayfile=$request->uri;
1224: $displayfile=~s/^\/[^\/]*//;
1225: $result='<html><body bgcolor="#FFFFFF"><h3>'.$displayfile.
1226: '</h3></body></html>';
1227: $result=&inserteditinfo($result,$filecontents,$filetype);
1228: }
1229: }
1230: if ($filetype eq 'html') { writeallows($request->uri); }
1231:
1232:
1233:
1234: $request->print($result);
1235:
1236: return OK;
1237: }
1238:
1239: sub display_title {
1240: my $result;
1241: if ($ENV{'request.state'} eq 'construct') {
1242: my $title=&Apache::lonnet::gettitle();
1243: if (!defined($title) || $title eq '') {
1244: $title = $ENV{'request.filename'};
1245: $title = substr($title, rindex($title, '/') + 1);
1246: }
1247: $result = "<script type='text/javascript'>top.document.title = '$title - LON-CAPA Construction Space';</script>";
1248: }
1249: return $result;
1250: }
1251:
1252: sub debug {
1253: if ($Apache::lonxml::debug eq 1) {
1254: $|=1;
1255: print('<font size="-2"<pre>DEBUG:'.&HTML::Entities::encode($_[0])."</pre></font>\n");
1256: }
1257: }
1258:
1259: sub error {
1260: $errorcount++;
1261: if (($Apache::lonxml::debug eq 1) || ($ENV{'request.state'} eq 'construct') ) {
1262: # If printing in construction space, put the error inside <pre></pre>
1263: print "<b>ERROR:</b>".join("\n",@_)."\n";
1264: } else {
1265: print "<b>An Error occured while processing this resource. The instructor has been notified.</b> <br />";
1266: #notify author
1267: &Apache::lonmsg::author_res_msg($ENV{'request.filename'},join('<br />',@_));
1268: #notify course
1269: if ( $ENV{'request.course.id'} ) {
1270: my (undef,%users)=&Apache::lonfeedback::decide_receiver(undef,0,1,1,1);
1271: my $declutter=&Apache::lonnet::declutter($ENV{'request.filename'});
1272: foreach (keys %users) {
1273: my ($user,$domain) = split(/:/, $_);
1274: &Apache::lonmsg::user_normal_msg($user,$domain,
1275: "Error [$declutter]",join('<br />',@_));
1276: }
1277: }
1278:
1279: #FIXME probably shouldn't have me get everything forever.
1280: &Apache::lonmsg::user_normal_msg('albertel','msu',"Error in $ENV{'request.filename'}",join('<br />',@_));
1281: #&Apache::lonmsg::user_normal_msg('albertel','103',"Error in $ENV{'request.filename'}",$_[0]);
1282: }
1283: }
1284:
1285: sub warning {
1286: $warningcount++;
1287:
1288: if ($ENV{'form.grade_target'} ne 'tex') {
1289: if ($ENV{'request.state'} eq 'construct' || $Apache::lonxml::debug) {
1290: print "<b>W</b>ARNING<b>:</b>".join('<br />',@_)."<br />\n";
1291: }
1292: }
1293: }
1294:
1295: sub get_param {
1296: my ($param,$parstack,$safeeval,$context,$case_insensitive) = @_;
1297: if ( ! $context ) { $context = -1; }
1298: my $args ='';
1299: if ( $#$parstack > (-2-$context) ) { $args=$$parstack[$context]; }
1300: if ( ! $args ) { return undef; }
1301: if ( $case_insensitive ) {
1302: if ($args =~ s/(my \$)(\Q$param\E)(=\")/$1.lc($2).$3/ei) {
1303: return &Apache::run::run("{$args;".'return $'.$param.'}',
1304: $safeeval); #'
1305: } else {
1306: return undef;
1307: }
1308: } else {
1309: if ( $args =~ /my \$\Q$param\E=\"/ ) {
1310: return &Apache::run::run("{$args;".'return $'.$param.'}',
1311: $safeeval); #'
1312: } else {
1313: return undef;
1314: }
1315: }
1316: }
1317:
1318: sub get_param_var {
1319: my ($param,$parstack,$safeeval,$context,$case_insensitive) = @_;
1320: if ( ! $context ) { $context = -1; }
1321: my $args ='';
1322: if ( $#$parstack > (-2-$context) ) { $args=$$parstack[$context]; }
1323: &Apache::lonxml::debug("Args are $args param is $param");
1324: if ($case_insensitive) {
1325: if (! ($args=~s/(my \$)(\Q$param\E)(=\")/$1.lc($2).$3/ei)) {
1326: return undef;
1327: }
1328: } elsif ( $args !~ /my \$\Q$param\E=\"/ ) { return undef; }
1329: my $value=&Apache::run::run("{$args;".'return $'.$param.'}',$safeeval); #'
1330: &Apache::lonxml::debug("first run is $value");
1331: if ($value =~ /^[\$\@\%]\w+$/) {
1332: &Apache::lonxml::debug("doing second");
1333: my @result=&Apache::run::run("return $value",$safeeval,1);
1334: if (!defined($result[0])) {
1335: return $value
1336: } else {
1337: if (wantarray) { return @result; } else { return $result[0]; }
1338: }
1339: } else {
1340: return $value;
1341: }
1342: }
1343:
1344: sub register_insert {
1345: my @data = split /\n/, &Apache::lonnet::getfile('/home/httpd/lonTabs/insertlist.tab');
1346: my $i;
1347: my $tagnum=0;
1348: my @order;
1349: for ($i=0;$i < $#data; $i++) {
1350: my $line = $data[$i];
1351: if ( $line =~ /^\#/ || $line =~ /^\s*\n/) { next; }
1352: if ( $line =~ /TABLE/ ) { last; }
1353: my ($tag,$descrip,$color,$function,$show,$helpfile,$helpdesc) = split(/,/, $line);
1354: if ($tag) {
1355: $insertlist{"$tagnum.tag"} = $tag;
1356: $insertlist{"$tagnum.description"} = $descrip;
1357: $insertlist{"$tagnum.color"} = $color;
1358: $insertlist{"$tagnum.function"} = $function;
1359: if (!defined($show)) { $show='yes'; }
1360: $insertlist{"$tagnum.show"}= $show;
1361: $insertlist{"$tagnum.helpfile"} = $helpfile;
1362: $insertlist{"$tagnum.helpdesc"} = $helpdesc;
1363: $insertlist{"$tag.num"}=$tagnum;
1364: $tagnum++;
1365: }
1366: }
1367: $i++; #skipping TABLE line
1368: $tagnum = 0;
1369: for (;$i < $#data;$i++) {
1370: my $line = $data[$i];
1371: my ($mnemonic,@which) = split(/ +/,$line);
1372: my $tag = $insertlist{"$tagnum.tag"};
1373: for (my $j=0;$j <=$#which;$j++) {
1374: if ( $which[$j] eq 'Y' ) {
1375: if ($insertlist{"$j.show"} ne 'no') {
1376: push(@{ $insertlist{"$tag.which"} },$j);
1377: }
1378: }
1379: }
1380: $tagnum++;
1381: }
1382: }
1383:
1384: sub description {
1385: my ($token)=@_;
1386: my $tagnum;
1387: my $tag=$token->[1];
1388: foreach my $namespace (reverse @Apache::lonxml::namespace) {
1389: my $testtag=$namespace.'::'.$tag;
1390: $tagnum=$insertlist{"$testtag.num"};
1391: if (defined($tagnum)) { last; }
1392: }
1393: if (!defined ($tagnum)) { $tagnum=$Apache::lonxml::insertlist{"$tag.num"}; }
1394: return $insertlist{$tagnum.'.description'};
1395: }
1396:
1397: # Returns a list containing the help file, and the description
1398: sub helpinfo {
1399: my ($token)=@_;
1400: my $tagnum;
1401: my $tag=$token->[1];
1402: foreach my $namespace (reverse @Apache::lonxml::namespace) {
1403: my $testtag=$namespace.'::'.$tag;
1404: $tagnum=$insertlist{"$testtag.num"};
1405: if (defined($tagnum)) { last; }
1406: }
1407: if (!defined ($tagnum)) { $tagnum=$Apache::lonxml::insertlist{"$tag.num"}; }
1408: return ($insertlist{$tagnum.'.helpfile'}, $insertlist{$tagnum.'.helpdesc'});
1409: }
1410:
1411: # ----------------------------------------------------------------- whichuser
1412: # returns a list of $symb, $courseid, $domain, $name that is correct for
1413: # calls to lonnet functions for this setup.
1414: # - looks for form.grade_ parameters
1415: sub whichuser {
1416: my ($passedsymb)=@_;
1417: my ($symb,$courseid,$domain,$name,$publicuser);
1418: if (defined($ENV{'form.grade_symb'})) {
1419: my $tmp_courseid=$ENV{'form.grade_courseid'};
1420: my $allowed=&Apache::lonnet::allowed('vgr',$tmp_courseid);
1421: if ($allowed) {
1422: $symb=$ENV{'form.grade_symb'};
1423: $courseid=$ENV{'form.grade_courseid'};
1424: $domain=$ENV{'form.grade_domain'};
1425: $name=$ENV{'form.grade_username'};
1426: }
1427: } else {
1428: if (!$passedsymb) {
1429: $symb=&Apache::lonnet::symbread();
1430: } else {
1431: $symb=$passedsymb;
1432: }
1433: $courseid=$ENV{'request.course.id'};
1434: $domain=$ENV{'user.domain'};
1435: $name=$ENV{'user.name'};
1436: if ($name eq 'public' && $domain eq 'public') {
1437: if (!defined($ENV{'form.username'})) {
1438: $ENV{'form.username'}.=time.rand(10000000);
1439: }
1440: $name.=$ENV{'form.username'};
1441: }
1442: }
1443: return ($symb,$courseid,$domain,$name,$publicuser);
1444: }
1445:
1446: 1;
1447: __END__
1448:
1449:
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