1: # The LearningOnline Network with CAPA
2: # XML Parser Module
3: #
4: # $Id: lonxml.pm,v 1.282 2003/10/01 21:13:50 albertel 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: use Apache::lonlocal;
109:
110: #================================================== Main subroutine: xmlparse
111: #debugging control, to turn on debugging modify the correct handler
112: $Apache::lonxml::debug=0;
113:
114: # keeps count of the number of warnings and errors generated in a parse
115: $warningcount=0;
116: $errorcount=0;
117:
118: #path to the directory containing the file currently being processed
119: @pwd=();
120:
121: #these two are used for capturing a subset of the output for later processing,
122: #don't touch them directly use &startredirection and &endredirection
123: @outputstack = ();
124: $redirection = 0;
125:
126: #controls wheter the <import> tag actually does
127: $import = 1;
128: @extlinks=();
129:
130: # meta mode is a bit weird only some output is to be turned off
131: #<output> tag turns metamode off (defined in londefdef.pm)
132: $metamode = 0;
133:
134: # turns on and of run::evaluate actually derefencing var refs
135: $evaluate = 1;
136:
137: # data structure for eidt mode, determines what tags can go into what other tags
138: %insertlist=();
139:
140: # stores the list of active tag namespaces
141: @namespace=();
142:
143: # if 0 all high ASCII characters will be encoded into HTML Entities
144: $prevent_entity_encode=0;
145:
146: # has the dynamic menu been updated to know about this resource
147: $Apache::lonxml::registered=0;
148:
149: # a pointer the the Apache request object
150: $Apache::lonxml::request='';
151:
152: # a problem number counter, and check on ether it is used
153: $Apache::lonxml::counter=1;
154: $Apache::lonxml::counter_changed=0;
155:
156: #internal check on whether to look at style defs
157: $Apache::lonxml::usestyle=1;
158:
159: #locations used to store the parameter string for style substitutions
160: $Apache::lonxml::style_values='';
161: $Apache::lonxml::style_end_values='';
162:
163: #array of ssi calls that need to occur after we are done parsing
164: @Apache::lonxml::ssi_info=();
165:
166: #should we do the postag variable interpolation
167: $Apache::lonxml::post_evaluate=1;
168:
169: sub xmlbegin {
170: my $output='';
171: if ($ENV{'browser.mathml'}) {
172: $output='<?xml version="1.0"?>'
173: .'<?xml-stylesheet type="text/css" href="/adm/MathML/mathml.css"?>'
174: .'<!DOCTYPE html SYSTEM "/adm/MathML/mathml.dtd" '
175: .'[<!ENTITY mathns "http://www.w3.org/1998/Math/MathML">]>'
176: .'<html xmlns:math="http://www.w3.org/1998/Math/MathML" '
177: .'xmlns="http://www.w3.org/TR/REC-html40">';
178: } else {
179: $output='<html>';
180: }
181: return $output;
182: }
183:
184: sub xmlend {
185: my $mode='xml';
186: my $status='OPEN';
187: if ($Apache::lonhomework::parsing_a_problem) {
188: $mode='problem';
189: $status=$Apache::inputtags::status[-1];
190: }
191: return &Apache::lonfeedback::list_discussion().'</html>';
192: }
193:
194: sub tokeninputfield {
195: my $defhost=$Apache::lonnet::perlvar{'lonHostID'};
196: $defhost=~tr/a-z/A-Z/;
197: return (<<ENDINPUTFIELD)
198: <script type="text/javascript">
199: function updatetoken() {
200: var comp=new Array;
201: var barcode=unescape(document.tokeninput.barcode.value);
202: comp=barcode.split('*');
203: if (typeof(comp[0])!="undefined") {
204: document.tokeninput.codeone.value=comp[0];
205: }
206: if (typeof(comp[1])!="undefined") {
207: document.tokeninput.codetwo.value=comp[1];
208: }
209: if (typeof(comp[2])!="undefined") {
210: comp[2]=comp[2].toUpperCase();
211: document.tokeninput.codethree.value=comp[2];
212: }
213: document.tokeninput.barcode.value='';
214: }
215: </script>
216: <form method="post" name="tokeninput">
217: <table border="2" bgcolor="#FFFFBB">
218: <tr><th>DocID Checkin</th></tr>
219: <tr><td>
220: <table>
221: <tr>
222: <td>Scan in Barcode</td>
223: <td><input type="text" size="22" name="barcode"
224: onChange="updatetoken()"/></td>
225: </tr>
226: <tr><td><i>or</i> Type in DocID</td>
227: <td>
228: <input type="text" size="5" name="codeone" />
229: <b><font size="+2">*</font></b>
230: <input type="text" size="5" name="codetwo" />
231: <b><font size="+2">*</font></b>
232: <input type="text" size="10" name="codethree" value="$defhost"
233: onChange="this.value=this.value.toUpperCase()" />
234: </td></tr>
235: </table>
236: </td></tr>
237: <tr><td><input type="submit" value="Check in DocID" /></td></tr>
238: </table>
239: </form>
240: ENDINPUTFIELD
241: }
242:
243: sub maketoken {
244: my ($symb,$tuname,$tudom,$tcrsid)=@_;
245: unless ($symb) {
246: $symb=&Apache::lonnet::symbread();
247: }
248: unless ($tuname) {
249: $tuname=$ENV{'user.name'};
250: $tudom=$ENV{'user.domain'};
251: $tcrsid=$ENV{'request.course.id'};
252: }
253:
254: return &Apache::lonnet::checkout($symb,$tuname,$tudom,$tcrsid);
255: }
256:
257: sub printtokenheader {
258: my ($target,$token,$tsymb,$tcrsid,$tudom,$tuname)=@_;
259: unless ($token) { return ''; }
260:
261: my ($symb,$courseid,$domain,$name) = &Apache::lonxml::whichuser();
262: unless ($tsymb) {
263: $tsymb=$symb;
264: }
265: unless ($tuname) {
266: $tuname=$name;
267: $tudom=$domain;
268: $tcrsid=$courseid;
269: }
270:
271: my %reply=&Apache::lonnet::get('environment',
272: ['firstname','middlename','lastname','generation'],
273: $tudom,$tuname);
274: my $plainname=$reply{'firstname'}.' '.
275: $reply{'middlename'}.' '.
276: $reply{'lastname'}.' '.
277: $reply{'generation'};
278:
279: if ($target eq 'web') {
280: my %idhash=&Apache::lonnet::idrget($tudom,($tuname));
281: return
282: '<img align="right" src="/cgi-bin/barcode.png?encode='.$token.'" />'.
283: 'Checked out for '.$plainname.
284: '<br />User: '.$tuname.' at '.$tudom.
285: '<br />ID: '.$idhash{$tuname}.
286: '<br />CourseID: '.$tcrsid.
287: '<br />Course: '.$ENV{'course.'.$tcrsid.'.description'}.
288: '<br />DocID: '.$token.
289: '<br />Time: '.localtime().'<hr />';
290: } else {
291: return $token;
292: }
293: }
294:
295: sub fontsettings() {
296: my $headerstring='';
297: if (($ENV{'browser.os'} eq 'mac') && (!$ENV{'browser.mathml'})) {
298: $headerstring.=
299: '<meta Content-Type="text/html; charset=x-mac-roman">';
300: } elsif (!$ENV{'browser.mathml'} && $ENV{'browser.unicode'}) {
301: $headerstring.=
302: '<meta http-equiv="Content-Type" content="text/html; charset=utf-8" />';
303: }
304: return $headerstring;
305: }
306:
307: sub printalltags {
308: my $temp;
309: foreach $temp (sort keys %Apache::lonxml::alltags) {
310: &Apache::lonxml::debug("$temp -- ".
311: join(',',@{ $Apache::lonxml::alltags{$temp} }));
312: }
313: }
314:
315: sub xmlparse {
316: my ($request,$target,$content_file_string,$safeinit,%style_for_target) = @_;
317:
318: &setup_globals($request,$target);
319: &Apache::inputtags::initialize_inputtags();
320: &Apache::outputtags::initialize_outputtags();
321: &Apache::edit::initialize_edit();
322:
323: #
324: # do we have a course style file?
325: #
326:
327: if ($ENV{'request.course.id'} && $ENV{'request.state'} ne 'construct') {
328: my $bodytext=
329: $ENV{'course.'.$ENV{'request.course.id'}.'.default_xml_style'};
330: if ($bodytext) {
331: my $location=&Apache::lonnet::filelocation('',$bodytext);
332: my $styletext=&Apache::lonnet::getfile($location);
333: if ($styletext ne '-1') {
334: %style_for_target = (%style_for_target,
335: &Apache::style::styleparser($target,$styletext));
336: }
337: }
338: }
339: #&printalltags();
340: my @pars = ();
341: my $pwd=$ENV{'request.filename'};
342: $pwd =~ s:/[^/]*$::;
343: &newparser(\@pars,\$content_file_string,$pwd);
344:
345: my $safeeval = new Safe;
346: my $safehole = new Safe::Hole;
347: &init_safespace($target,$safeeval,$safehole,$safeinit);
348: #-------------------- Redefinition of the target in the case of compound target
349:
350: ($target, my @tenta) = split('&&',$target);
351:
352: my @stack = ();
353: my @parstack = ();
354: &initdepth;
355:
356: my $finaloutput = &inner_xmlparse($target,\@stack,\@parstack,\@pars,
357: $safeeval,\%style_for_target);
358:
359: if ($ENV{'request.uri'}) {
360: &writeallows($ENV{'request.uri'});
361: }
362: &do_registered_ssi();
363: if ($Apache::lonxml::counter_changed) { &store_counter() }
364: return $finaloutput;
365: }
366:
367: sub htmlclean {
368: my ($raw,$full)=@_;
369:
370: my $tree = HTML::TreeBuilder->new;
371: $tree->ignore_unknown(0);
372:
373: $tree->parse($raw);
374:
375: my $output= $tree->as_HTML(undef,' ');
376:
377: $output=~s/\<(br|hr|img|meta|allow)(.*?)\>/\<$1$2 \/\>/gis;
378: $output=~s/\<\/(br|hr|img|meta|allow)\>//gis;
379: unless ($full) {
380: $output=~s/\<[\/]*(body|head|html)\>//gis;
381: }
382:
383: $tree = $tree->delete;
384:
385: return $output;
386: }
387:
388: sub latex_special_symbols {
389: my ($string,$where)=@_;
390: if ($where eq 'header') {
391: $string =~ s/(\\|_|\^)/ /g;
392: $string =~ s/(\$|%|\#|&|\{|\})/\\$1/g;
393: $string =~ s/_/ /g;
394: } else {
395: $string=~s/\\ /\\char92 /g;
396: $string=~s/\^/\\char94 /g;
397: $string=~s/\~/\\char126 /g;
398: $string=~s/(&[^A-Za-z\#])/\\$1/g;
399: $string=~s/([^&])\#/$1\\#/g;
400: $string=~s/(\$|_|{|})/\\$1/g;
401: $string=~s/\\char92 /\\texttt{\\char92}/g;
402: $string=~s/(>|<)/\$$1\$/g; #more or less
403: if ($string=~m/\d%/) {$string =~ s/(\d)%/$1\\%/g;} #percent after digit
404: if ($string=~m/\s%/) {$string =~ s/(\s)%/$1\\%/g;} #percent after space
405: if ($string eq '%.') {$string = '\%.';} #percent at the end of statement
406: }
407: return $string;
408: }
409:
410: sub inner_xmlparse {
411: my ($target,$stack,$parstack,$pars,$safeeval,$style_for_target)=@_;
412: my $finaloutput = '';
413: my $result;
414: my $token;
415: my $dontpop=0;
416: while ( $#$pars > -1 ) {
417: while ($token = $$pars['-1']->get_token) {
418: if (($token->[0] eq 'T') || ($token->[0] eq 'C') ) {
419: if ($metamode<1) {
420: my $text=$token->[1];
421: if ($token->[0] eq 'C' && $target eq 'tex') {
422: $text = '';
423: # $text = '%'.$text."\n";
424: }
425: $result.=$text;
426: }
427: } elsif (($token->[0] eq 'D')) {
428: if ($metamode<1 && $target eq 'web') {
429: my $text=$token->[1];
430: $result.=$text;
431: }
432: } elsif ($token->[0] eq 'PI') {
433: if ($metamode<1 && $target eq 'web') {
434: $result=$token->[2];
435: }
436: } elsif ($token->[0] eq 'S') {
437: # add tag to stack
438: push (@$stack,$token->[1]);
439: # add parameters list to another stack
440: push (@$parstack,&parstring($token));
441: &increasedepth($token);
442: if ($Apache::lonxml::usestyle &&
443: exists($$style_for_target{$token->[1]})) {
444: $Apache::lonxml::usestyle=0;
445: my $string=$$style_for_target{$token->[1]}.
446: '<LONCAPA_INTERNAL_TURN_STYLE_ON />';
447: &Apache::lonxml::newparser($pars,\$string);
448: $Apache::lonxml::style_values=$$parstack[-1];
449: $Apache::lonxml::style_end_values=$$parstack[-1];
450: } else {
451: $result = &callsub("start_$token->[1]", $target, $token, $stack,
452: $parstack, $pars, $safeeval, $style_for_target);
453: }
454: } elsif ($token->[0] eq 'E') {
455: if ($Apache::lonxml::usestyle &&
456: exists($$style_for_target{'/'."$token->[1]"})) {
457: $Apache::lonxml::usestyle=0;
458: my $string=$$style_for_target{'/'.$token->[1]}.
459: '<LONCAPA_INTERNAL_TURN_STYLE_ON end="'.$token->[1].'" />';
460: &Apache::lonxml::newparser($pars,\$string);
461: $Apache::lonxml::style_values=$Apache::lonxml::style_end_values;
462: $Apache::lonxml::style_end_values='';
463: $dontpop=1;
464: } else {
465: #clear out any tags that didn't end
466: while ($token->[1] ne $$stack['-1'] && ($#$stack > -1)) {
467: my $lasttag=$$stack[-1];
468: if ($token->[1] =~ /^$lasttag$/i) {
469: &Apache::lonxml::warning('Using tag </'.$token->[1].'> on line '.$token->[3].' as end tag to <'.$$stack[-1].'>');
470: last;
471: } else {
472: &Apache::lonxml::warning('Found tag </'.$token->[1].'> on line '.$token->[3].' when looking for </'.$$stack[-1].'> in file');
473: &end_tag($stack,$parstack,$token);
474: }
475: }
476: $result = &callsub("end_$token->[1]", $target, $token, $stack,
477: $parstack, $pars,$safeeval, $style_for_target);
478: }
479: } else {
480: &Apache::lonxml::error("Unknown token event :$token->[0]:$token->[1]:");
481: }
482: #evaluate variable refs in result
483: if ($Apache::lonxml::post_evaluate &&$result ne "") {
484: my $extras;
485: if (!$Apache::lonxml::usestyle) {
486: $extras=$Apache::lonxml::style_values;
487: }
488: if ( $#$parstack > -1 ) {
489: $result=&Apache::run::evaluate($result,$safeeval,$extras.$$parstack[-1]);
490: } else {
491: $result= &Apache::run::evaluate($result,$safeeval,$extras);
492: }
493: }
494: $Apache::lonxml::post_evaluate=1;
495:
496: if (($token->[0] eq 'T') || ($token->[0] eq 'C') || ($token->[0] eq 'D') ) {
497: #Style file definitions should be correct
498: if ($target eq 'tex' && ($Apache::lonxml::usestyle)) {
499: $result=&latex_special_symbols($result);
500: }
501: }
502:
503: # Encode any high ASCII characters
504: # if (!$Apache::lonxml::prevent_entity_encode) {
505: # $result=&HTML::Entities::encode($result,"\200-\377");
506: # }
507: if ($Apache::lonxml::redirection) {
508: $Apache::lonxml::outputstack['-1'] .= $result;
509: } else {
510: $finaloutput.=$result;
511: }
512: $result = '';
513:
514: if ($token->[0] eq 'E' && !$dontpop) {
515: &end_tag($stack,$parstack,$token);
516: }
517: $dontpop=0;
518: }
519: if ($#$pars > -1) {
520: pop @$pars;
521: pop @Apache::lonxml::pwd;
522: }
523: }
524:
525: # if ($target eq 'meta') {
526: # $finaloutput.=&endredirection;
527: # }
528:
529:
530: if (($ENV{'QUERY_STRING'}) && ($target eq 'web')) {
531: $finaloutput=&afterburn($finaloutput);
532: }
533: return $finaloutput;
534: }
535:
536: sub callsub {
537: my ($sub,$target,$token,$tagstack,$parstack,$parser,$safeeval,$style)=@_;
538: my $currentstring='';
539: my $nodefault;
540: {
541: my $sub1;
542: no strict 'refs';
543: my $tag=$token->[1];
544: # get utterly rid of extended html tags
545: if ($tag=~/^x\-/i) { return ''; }
546: my $space=$Apache::lonxml::alltags{$tag}[-1];
547: if (!$space) {
548: $tag=~tr/A-Z/a-z/;
549: $sub=~tr/A-Z/a-z/;
550: $space=$Apache::lonxml::alltags{$tag}[-1]
551: }
552:
553: my $deleted=0;
554: $Apache::lonxml::curdepth=join('_',@Apache::lonxml::depthcounter);
555: if (($token->[0] eq 'S') && ($target eq 'modified')) {
556: $deleted=&Apache::edit::handle_delete($space,$target,$token,$tagstack,
557: $parstack,$parser,$safeeval,
558: $style);
559: }
560: if (!$deleted) {
561: if ($space) {
562: #&Apache::lonxml::debug("Calling sub $sub in $space $metamode");
563: $sub1="$space\:\:$sub";
564: ($currentstring,$nodefault) = &$sub1($target,$token,$tagstack,
565: $parstack,$parser,$safeeval,
566: $style);
567: } else {
568: #&Apache::lonxml::debug("NOT Calling sub $sub in $space $metamode");
569: if ($metamode <1) {
570: if (defined($token->[4]) && ($metamode < 1)) {
571: $currentstring = $token->[4];
572: } else {
573: $currentstring = $token->[2];
574: }
575: }
576: }
577: # &Apache::lonxml::debug("nodefalt:$nodefault:");
578: if ($currentstring eq '' && $nodefault eq '') {
579: if ($target eq 'edit') {
580: #&Apache::lonxml::debug("doing default edit for $token->[1]");
581: if ($token->[0] eq 'S') {
582: $currentstring = &Apache::edit::tag_start($target,$token);
583: } elsif ($token->[0] eq 'E') {
584: $currentstring = &Apache::edit::tag_end($target,$token);
585: }
586: } elsif ($target eq 'modified') {
587: if ($token->[0] eq 'S') {
588: $currentstring = $token->[4];
589: $currentstring.=&Apache::edit::handle_insert();
590: } elsif ($token->[0] eq 'E') {
591: $currentstring = $token->[2];
592: $currentstring.=&Apache::edit::handle_insertafter($token->[1]);
593: } else {
594: $currentstring = $token->[2];
595: }
596: }
597: }
598: }
599: use strict 'refs';
600: }
601: return $currentstring;
602: }
603:
604: sub setup_globals {
605: my ($request,$target)=@_;
606: $Apache::lonxml::request=$request;
607: $Apache::lonxml::registered = 0;
608: $errorcount=0;
609: $warningcount=0;
610: $Apache::lonxml::default_homework_loaded=0;
611: $Apache::lonxml::usestyle=1;
612: &init_counter();
613: @Apache::lonxml::pwd=();
614: @Apache::lonxml::extlinks=();
615: @Apache::lonxml::ssi_info=();
616: $Apache::lonxml::post_evaluate=1;
617: if ($target eq 'meta') {
618: $Apache::lonxml::redirection = 0;
619: $Apache::lonxml::metamode = 1;
620: $Apache::lonxml::evaluate = 1;
621: $Apache::lonxml::import = 0;
622: } elsif ($target eq 'answer') {
623: $Apache::lonxml::redirection = 0;
624: $Apache::lonxml::metamode = 1;
625: $Apache::lonxml::evaluate = 1;
626: $Apache::lonxml::import = 1;
627: } elsif ($target eq 'grade') {
628: &startredirection;
629: $Apache::lonxml::metamode = 0;
630: $Apache::lonxml::evaluate = 1;
631: $Apache::lonxml::import = 1;
632: } elsif ($target eq 'modified') {
633: $Apache::lonxml::redirection = 0;
634: $Apache::lonxml::metamode = 0;
635: $Apache::lonxml::evaluate = 0;
636: $Apache::lonxml::import = 0;
637: } elsif ($target eq 'edit') {
638: $Apache::lonxml::redirection = 0;
639: $Apache::lonxml::metamode = 0;
640: $Apache::lonxml::evaluate = 0;
641: $Apache::lonxml::import = 0;
642: } elsif ($target eq 'analyze') {
643: $Apache::lonxml::redirection = 0;
644: $Apache::lonxml::metamode = 0;
645: $Apache::lonxml::evaluate = 1;
646: $Apache::lonxml::import = 1;
647: } else {
648: $Apache::lonxml::redirection = 0;
649: $Apache::lonxml::metamode = 0;
650: $Apache::lonxml::evaluate = 1;
651: $Apache::lonxml::import = 1;
652: }
653: }
654:
655: sub init_safespace {
656: my ($target,$safeeval,$safehole,$safeinit) = @_;
657: $safeeval->permit("entereval");
658: $safeeval->permit(":base_math");
659: $safeeval->permit("sort");
660: $safeeval->deny(":base_io");
661: $safehole->wrap(\&Apache::scripttag::xmlparse,$safeeval,'&xmlparse');
662: $safehole->wrap(\&Apache::outputtags::multipart,$safeeval,'&multipart');
663: $safehole->wrap(\&Apache::lonnet::EXT,$safeeval,'&EXT');
664:
665: $safehole->wrap(\&Math::Cephes::asin,$safeeval,'&asin');
666: $safehole->wrap(\&Math::Cephes::acos,$safeeval,'&acos');
667: $safehole->wrap(\&Math::Cephes::atan,$safeeval,'&atan');
668: $safehole->wrap(\&Math::Cephes::sinh,$safeeval,'&sinh');
669: $safehole->wrap(\&Math::Cephes::cosh,$safeeval,'&cosh');
670: $safehole->wrap(\&Math::Cephes::tanh,$safeeval,'&tanh');
671: $safehole->wrap(\&Math::Cephes::asinh,$safeeval,'&asinh');
672: $safehole->wrap(\&Math::Cephes::acosh,$safeeval,'&acosh');
673: $safehole->wrap(\&Math::Cephes::atanh,$safeeval,'&atanh');
674: $safehole->wrap(\&Math::Cephes::erf,$safeeval,'&erf');
675: $safehole->wrap(\&Math::Cephes::erfc,$safeeval,'&erfc');
676: $safehole->wrap(\&Math::Cephes::j0,$safeeval,'&j0');
677: $safehole->wrap(\&Math::Cephes::j1,$safeeval,'&j1');
678: $safehole->wrap(\&Math::Cephes::jn,$safeeval,'&jn');
679: $safehole->wrap(\&Math::Cephes::jv,$safeeval,'&jv');
680: $safehole->wrap(\&Math::Cephes::y0,$safeeval,'&y0');
681: $safehole->wrap(\&Math::Cephes::y1,$safeeval,'&y1');
682: $safehole->wrap(\&Math::Cephes::yn,$safeeval,'&yn');
683: $safehole->wrap(\&Math::Cephes::yv,$safeeval,'&yv');
684:
685: $safehole->wrap(\&Math::Cephes::bdtr ,$safeeval,'&bdtr' );
686: $safehole->wrap(\&Math::Cephes::bdtrc ,$safeeval,'&bdtrc' );
687: $safehole->wrap(\&Math::Cephes::bdtri ,$safeeval,'&bdtri' );
688: $safehole->wrap(\&Math::Cephes::btdtr ,$safeeval,'&btdtr' );
689: $safehole->wrap(\&Math::Cephes::chdtr ,$safeeval,'&chdtr' );
690: $safehole->wrap(\&Math::Cephes::chdtrc,$safeeval,'&chdtrc');
691: $safehole->wrap(\&Math::Cephes::chdtri,$safeeval,'&chdtri');
692: $safehole->wrap(\&Math::Cephes::fdtr ,$safeeval,'&fdtr' );
693: $safehole->wrap(\&Math::Cephes::fdtrc ,$safeeval,'&fdtrc' );
694: $safehole->wrap(\&Math::Cephes::fdtri ,$safeeval,'&fdtri' );
695: $safehole->wrap(\&Math::Cephes::gdtr ,$safeeval,'&gdtr' );
696: $safehole->wrap(\&Math::Cephes::gdtrc ,$safeeval,'&gdtrc' );
697: $safehole->wrap(\&Math::Cephes::nbdtr ,$safeeval,'&nbdtr' );
698: $safehole->wrap(\&Math::Cephes::nbdtrc,$safeeval,'&nbdtrc');
699: $safehole->wrap(\&Math::Cephes::nbdtri,$safeeval,'&nbdtri');
700: $safehole->wrap(\&Math::Cephes::ndtr ,$safeeval,'&ndtr' );
701: $safehole->wrap(\&Math::Cephes::ndtri ,$safeeval,'&ndtri' );
702: $safehole->wrap(\&Math::Cephes::pdtr ,$safeeval,'&pdtr' );
703: $safehole->wrap(\&Math::Cephes::pdtrc ,$safeeval,'&pdtrc' );
704: $safehole->wrap(\&Math::Cephes::pdtri ,$safeeval,'&pdtri' );
705: $safehole->wrap(\&Math::Cephes::stdtr ,$safeeval,'&stdtr' );
706: $safehole->wrap(\&Math::Cephes::stdtri,$safeeval,'&stdtri');
707:
708: # $safehole->wrap(\&Math::Cephes::new_fract,$safeeval,'&new_fract');
709: # $safehole->wrap(\&Math::Cephes::radd,$safeeval,'&radd');
710: # $safehole->wrap(\&Math::Cephes::rsub,$safeeval,'&rsub');
711: # $safehole->wrap(\&Math::Cephes::rmul,$safeeval,'&rmul');
712: # $safehole->wrap(\&Math::Cephes::rdiv,$safeeval,'&rdiv');
713: # $safehole->wrap(\&Math::Cephes::euclid,$safeeval,'&euclid');
714:
715: $safehole->wrap(\&Math::Random::random_beta,$safeeval,'&math_random_beta');
716: $safehole->wrap(\&Math::Random::random_chi_square,$safeeval,'&math_random_chi_square');
717: $safehole->wrap(\&Math::Random::random_exponential,$safeeval,'&math_random_exponential');
718: $safehole->wrap(\&Math::Random::random_f,$safeeval,'&math_random_f');
719: $safehole->wrap(\&Math::Random::random_gamma,$safeeval,'&math_random_gamma');
720: $safehole->wrap(\&Math::Random::random_multivariate_normal,$safeeval,'&math_random_multivariate_normal');
721: $safehole->wrap(\&Math::Random::random_multinomial,$safeeval,'&math_random_multinomial');
722: $safehole->wrap(\&Math::Random::random_noncentral_chi_square,$safeeval,'&math_random_noncentral_chi_square');
723: $safehole->wrap(\&Math::Random::random_noncentral_f,$safeeval,'&math_random_noncentral_f');
724: $safehole->wrap(\&Math::Random::random_normal,$safeeval,'&math_random_normal');
725: $safehole->wrap(\&Math::Random::random_permutation,$safeeval,'&math_random_permutation');
726: $safehole->wrap(\&Math::Random::random_permuted_index,$safeeval,'&math_random_permuted_index');
727: $safehole->wrap(\&Math::Random::random_uniform,$safeeval,'&math_random_uniform');
728: $safehole->wrap(\&Math::Random::random_poisson,$safeeval,'&math_random_poisson');
729: $safehole->wrap(\&Math::Random::random_uniform_integer,$safeeval,'&math_random_uniform_integer');
730: $safehole->wrap(\&Math::Random::random_negative_binomial,$safeeval,'&math_random_negative_binomial');
731: $safehole->wrap(\&Math::Random::random_binomial,$safeeval,'&math_random_binomial');
732: $safehole->wrap(\&Math::Random::random_seed_from_phrase,$safeeval,'&random_seed_from_phrase');
733: $safehole->wrap(\&Math::Random::random_set_seed_from_phrase,$safeeval,'&random_set_seed_from_phrase');
734: $safehole->wrap(\&Math::Random::random_get_seed,$safeeval,'&random_get_seed');
735: $safehole->wrap(\&Math::Random::random_set_seed,$safeeval,'&random_set_seed');
736:
737: #need to inspect this class of ops
738: # $safeeval->deny(":base_orig");
739: $safeinit .= ';$external::target="'.$target.'";';
740: my $rndseed;
741: my ($symb,$courseid,$domain,$name) = &Apache::lonxml::whichuser();
742: $rndseed=&Apache::lonnet::rndseed($symb,$courseid,$domain,$name);
743: $safeinit .= ';$external::randomseed='.$rndseed.';';
744: &Apache::lonxml::debug("Setting rndseed to $rndseed");
745: &Apache::run::run($safeinit,$safeeval);
746: }
747:
748: sub default_homework_load {
749: my ($safeeval)=@_;
750: &Apache::lonxml::debug('Loading default_homework');
751: my $default=&Apache::lonnet::getfile('/home/httpd/html/res/adm/includes/default_homework.lcpm');
752: if ($default eq -1) {
753: &Apache::lonxml::error("<b>Unable to find <i>default_homework.lcpm</i></b>");
754: } else {
755: &Apache::run::run($default,$safeeval);
756: $Apache::lonxml::default_homework_loaded=1;
757: }
758: }
759:
760: sub startredirection {
761: $Apache::lonxml::redirection++;
762: push (@Apache::lonxml::outputstack, '');
763: }
764:
765: sub endredirection {
766: if (!$Apache::lonxml::redirection) {
767: &Apache::lonxml::error("Endredirection was called, before a startredirection, perhaps you have unbalanced tags. Some debuging information:".join ":",caller);
768: return '';
769: }
770: $Apache::lonxml::redirection--;
771: pop @Apache::lonxml::outputstack;
772: }
773:
774: sub end_tag {
775: my ($tagstack,$parstack,$token)=@_;
776: pop(@$tagstack);
777: pop(@$parstack);
778: &decreasedepth($token);
779: }
780:
781: sub initdepth {
782: @Apache::lonxml::depthcounter=();
783: $Apache::lonxml::depth=-1;
784: $Apache::lonxml::olddepth=-1;
785: }
786:
787: sub increasedepth {
788: my ($token) = @_;
789: $Apache::lonxml::depth++;
790: $Apache::lonxml::depthcounter[$Apache::lonxml::depth]++;
791: if ($Apache::lonxml::depthcounter[$Apache::lonxml::depth]==1) {
792: $Apache::lonxml::olddepth=$Apache::lonxml::depth;
793: }
794: my $curdepth=join('_',@Apache::lonxml::depthcounter);
795: &Apache::lonxml::debug("s $Apache::lonxml::depth : $Apache::lonxml::olddepth : $curdepth : $token->[1]\n");
796: #print "<br />s $Apache::lonxml::depth : $Apache::lonxml::olddepth : $curdepth : $token->[1]\n";
797: }
798:
799: sub decreasedepth {
800: my ($token) = @_;
801: $Apache::lonxml::depth--;
802: if ($Apache::lonxml::depth<$Apache::lonxml::olddepth-1) {
803: $#Apache::lonxml::depthcounter--;
804: $Apache::lonxml::olddepth=$Apache::lonxml::depth+1;
805: }
806: if ( $Apache::lonxml::depth < -1) {
807: &Apache::lonxml::warning(&mt("Missing tags, unable to properly run file."));
808: $Apache::lonxml::depth='-1';
809: }
810: my $curdepth=join('_',@Apache::lonxml::depthcounter);
811: &Apache::lonxml::debug("e $Apache::lonxml::depth : $Apache::lonxml::olddepth : $token->[1] : $curdepth\n");
812: #print "<br />e $Apache::lonxml::depth : $Apache::lonxml::olddepth : $token->[1] : $curdepth\n";
813: }
814:
815: sub get_all_text_unbalanced {
816: #there is a copy of this in lonpublisher.pm
817: my($tag,$pars)= @_;
818: my $token;
819: my $result='';
820: $tag='<'.$tag.'>';
821: while ($token = $$pars[-1]->get_token) {
822: if (($token->[0] eq 'T')||($token->[0] eq 'C')||($token->[0] eq 'D')) {
823: $result.=$token->[1];
824: } elsif ($token->[0] eq 'PI') {
825: $result.=$token->[2];
826: } elsif ($token->[0] eq 'S') {
827: $result.=$token->[4];
828: } elsif ($token->[0] eq 'E') {
829: $result.=$token->[2];
830: }
831: if ($result =~ /(.*)\Q$tag\E(.*)/s) {
832: &Apache::lonxml::debug('Got a winner with leftovers ::'.$2);
833: &Apache::lonxml::debug('Result is :'.$1);
834: $result=$1;
835: my $redo=$tag.$2;
836: &Apache::lonxml::newparser($pars,\$redo);
837: last;
838: }
839: }
840: return $result
841: }
842:
843: sub increment_counter {
844: my ($increment) = @_;
845: if (defined($increment) && $increment gt 0) {
846: $Apache::lonxml::counter+=$increment;
847: } else {
848: $Apache::lonxml::counter++;
849: }
850: $Apache::lonxml::counter_changed=1;
851: }
852:
853: sub init_counter {
854: if (defined($ENV{'form.counter'})) {
855: $Apache::lonxml::counter=$ENV{'form.counter'};
856: $Apache::lonxml::counter_changed=0;
857: } else {
858: $Apache::lonxml::counter=1;
859: $Apache::lonxml::counter_changed=1;
860: }
861: }
862:
863: sub store_counter {
864: &Apache::lonnet::appenv(('form.counter' => $Apache::lonxml::counter));
865: return '';
866: }
867:
868: sub get_all_text {
869: my($tag,$pars,$style)= @_;
870: &Apache::lonxml::debug("Got a ".ref($pars));
871: my $gotfullstack=1;
872: if (ref($pars) ne 'ARRAY') {
873: $gotfullstack=0;
874: $pars=[$pars];
875: }
876: &Apache::lonxml::debug("Got a ".ref($style));
877: if (ref($style) ne 'HASH') {
878: $style={};
879: } else {
880: &Apache::lonhomework::showhash(%$style);
881: }
882: my $depth=0;
883: my $token;
884: my $result='';
885: if ( $tag =~ m:^/: ) {
886: my $tag=substr($tag,1);
887: #&Apache::lonxml::debug("have:$tag:");
888: my $top_empty=0;
889: while (($depth >=0) && ($#$pars > -1) && (!$top_empty)) {
890: while (($depth >=0) && ($token = $$pars[-1]->get_token)) {
891: #&Apache::lonxml::debug("e token:$token->[0]:$depth:$token->[1]:".$#$pars.":".$#Apache::lonxml::pwd);
892: if (($token->[0] eq 'T')||($token->[0] eq 'C')||($token->[0] eq 'D')) {
893: $result.=$token->[1];
894: } elsif ($token->[0] eq 'PI') {
895: $result.=$token->[2];
896: } elsif ($token->[0] eq 'S') {
897: if ($token->[1] =~ /^$tag$/i) { $depth++; }
898: if ($token->[1] =~ /^LONCAPA_INTERNAL_TURN_STYLE_ON$/i) { $Apache::lonxml::usestyle=1; }
899: if ($token->[1] =~ /^LONCAPA_INTERNAL_TURN_STYLE_OFF$/i) { $Apache::lonxml::usestyle=0; }
900: $result.=$token->[4];
901: } elsif ($token->[0] eq 'E') {
902: if ( $token->[1] =~ /^$tag$/i) { $depth--; }
903: #skip sending back the last end tag
904: if ($depth == 0 && exists($$style{'/'.$token->[1]})) {
905: my $string=
906: '<LONCAPA_INTERNAL_TURN_STYLE_OFF end="yes" />'.
907: $$style{'/'.$token->[1]}.
908: $token->[2].
909: '<LONCAPA_INTERNAL_TURN_STYLE_ON />';
910: &Apache::lonxml::newparser($pars,\$string);
911: #&Apache::lonxml::debug("reParsing $string");
912: next;
913: }
914: if ($depth > -1) {
915: $result.=$token->[2];
916: } else {
917: $$pars[-1]->unget_token($token);
918: }
919: }
920: }
921: if (($depth >=0) && ($#$pars == 0) ) { $top_empty=1; }
922: if (($depth >=0) && ($#$pars > 0) ) {
923: pop(@$pars);
924: pop(@Apache::lonxml::pwd);
925: }
926: }
927: if ($top_empty && $depth >= 0) {
928: #never found the end tag ran out of text, throw error send back blank
929: &error('Never found end tag for <'.$tag.
930: '> current string <pre>'.
931: &HTML::Entities::encode($result).
932: '</pre>');
933: if ($gotfullstack) {
934: my $newstring='</'.$tag.'>'.$result;
935: &Apache::lonxml::newparser($pars,\$newstring);
936: }
937: $result='';
938: }
939: } else {
940: while ($#$pars > -1) {
941: while ($token = $$pars[-1]->get_token) {
942: #&Apache::lonxml::debug("s token:$token->[0]:$depth:$token->[1]");
943: if (($token->[0] eq 'T')||($token->[0] eq 'C')||
944: ($token->[0] eq 'D')) {
945: $result.=$token->[1];
946: } elsif ($token->[0] eq 'PI') {
947: $result.=$token->[2];
948: } elsif ($token->[0] eq 'S') {
949: if ( $token->[1] =~ /^$tag$/i) {
950: $$pars[-1]->unget_token($token); last;
951: } else {
952: $result.=$token->[4];
953: }
954: if ($token->[1] =~ /^LONCAPA_INTERNAL_TURN_STYLE_ON$/i) { $Apache::lonxml::usestyle=1; }
955: if ($token->[1] =~ /^LONCAPA_INTERNAL_TURN_STYLE_OFF$/i) { $Apache::lonxml::usestyle=0; }
956: } elsif ($token->[0] eq 'E') {
957: $result.=$token->[2];
958: }
959: }
960: if (($#$pars > 0) ) {
961: pop(@$pars);
962: pop(@Apache::lonxml::pwd);
963: } else { last; }
964: }
965: }
966: #&Apache::lonxml::debug("Exit:$result:");
967: return $result
968: }
969:
970: sub newparser {
971: my ($parser,$contentref,$dir) = @_;
972: push (@$parser,HTML::LCParser->new($contentref));
973: $$parser['-1']->xml_mode('1');
974: if ( $dir eq '' ) {
975: push (@Apache::lonxml::pwd, $Apache::lonxml::pwd[$#Apache::lonxml::pwd]);
976: } else {
977: push (@Apache::lonxml::pwd, $dir);
978: }
979: }
980:
981: sub parstring {
982: my ($token) = @_;
983: my $temp='';
984: foreach (@{$token->[3]}) {
985: unless ($_=~/\W/) {
986: my $val=$token->[2]->{$_};
987: $val =~ s/([\%\@\\\"\'])/\\$1/g;
988: #if ($val =~ m/^[\%\@]/) { $val="\\".$val; }
989: $temp .= "my \$$_=\"$val\";";
990: }
991: }
992: return $temp;
993: }
994:
995: sub writeallows {
996: unless ($#extlinks>=0) { return; }
997: my $thisurl='/res/'.&Apache::lonnet::declutter(shift);
998: if ($ENV{'httpref.'.$thisurl}) {
999: $thisurl=$ENV{'httpref.'.$thisurl};
1000: }
1001: my $thisdir=$thisurl;
1002: $thisdir=~s/\/[^\/]+$//;
1003: my %httpref=();
1004: foreach (@extlinks) {
1005: $httpref{'httpref.'.
1006: &Apache::lonnet::hreflocation($thisdir,$_)}=$thisurl;
1007: }
1008: @extlinks=();
1009: &Apache::lonnet::appenv(%httpref);
1010: }
1011:
1012: sub register_ssi {
1013: my ($url,%form)=@_;
1014: push (@Apache::lonxml::ssi_info,{'url'=>$url,'form'=>\%form});
1015: return '';
1016: }
1017:
1018: sub do_registered_ssi {
1019: foreach my $info (@Apache::lonxml::ssi_info) {
1020: my %form=%{ $info->{'form'}};
1021: my $url=$info->{'url'};
1022: &Apache::lonnet::ssi($url,%form);
1023: }
1024: }
1025: #
1026: # Afterburner handles anchors, highlights and links
1027: #
1028: sub afterburn {
1029: my $result=shift;
1030: &Apache::loncommon::get_unprocessed_cgi($ENV{'QUERY_STRING'},
1031: ['highlight','anchor','link']);
1032: if ($ENV{'form.highlight'}) {
1033: foreach (split(/\,/,$ENV{'form.highlight'})) {
1034: my $anchorname=$_;
1035: my $matchthis=$anchorname;
1036: $matchthis=~s/\_+/\\s\+/g;
1037: $result=~s/($matchthis)/\<font color=\"red\"\>$1\<\/font\>/gs;
1038: }
1039: }
1040: if ($ENV{'form.link'}) {
1041: foreach (split(/\,/,$ENV{'form.link'})) {
1042: my ($anchorname,$linkurl)=split(/\>/,$_);
1043: my $matchthis=$anchorname;
1044: $matchthis=~s/\_+/\\s\+/g;
1045: $result=~s/($matchthis)/\<a href=\"$linkurl\"\>$1\<\/a\>/gs;
1046: }
1047: }
1048: if ($ENV{'form.anchor'}) {
1049: my $anchorname=$ENV{'form.anchor'};
1050: my $matchthis=$anchorname;
1051: $matchthis=~s/\_+/\\s\+/g;
1052: $result=~s/($matchthis)/\<a name=\"$anchorname\"\>$1\<\/a\>/s;
1053: $result.=(<<"ENDSCRIPT");
1054: <script type="text/javascript">
1055: document.location.hash='$anchorname';
1056: </script>
1057: ENDSCRIPT
1058: }
1059: return $result;
1060: }
1061:
1062: sub storefile {
1063: my ($file,$contents)=@_;
1064: if (my $fh=Apache::File->new('>'.$file)) {
1065: print $fh $contents;
1066: $fh->close();
1067: return 1;
1068: } else {
1069: &warning("Unable to save file $file");
1070: return 0;
1071: }
1072: }
1073:
1074: sub createnewhtml {
1075: my $filecontents=(<<SIMPLECONTENT);
1076: <html>
1077: <head>
1078: <title>
1079: Title of Document Goes Here
1080: </title>
1081: </head>
1082: <body bgcolor="#FFFFFF">
1083:
1084: Body of Document Goes Here
1085:
1086: </body>
1087: </html>
1088: SIMPLECONTENT
1089: return $filecontents;
1090: }
1091:
1092: sub createnewsty {
1093: my $filecontents=(<<SIMPLECONTENT);
1094: <definetag name="">
1095: <render>
1096: <web></web>
1097: <tex></tex>
1098: </render>
1099: </definetag>
1100: SIMPLECONTENT
1101: return $filecontents;
1102: }
1103:
1104:
1105: sub inserteditinfo {
1106: my ($result,$filecontents,$filetype)=@_;
1107: $filecontents = &HTML::Entities::encode($filecontents);
1108: # my $editheader='<a href="#editsection">Edit below</a><hr />';
1109: my $xml_help = '';
1110: if ($filetype eq 'html') {
1111: $xml_help=Apache::loncommon::helpLatexCheatsheet();
1112: }
1113: my $cleanbut = '';
1114: if ($filetype eq 'html') {
1115: $cleanbut='<input type="submit" name="attemptclean" value="'.
1116: &mt('Save and then attempt to clean HTML').'" />';
1117: }
1118: my $titledisplay=&display_title();
1119: my %lt=&Apache::lonlocal::texthash('st' => 'Save this',
1120: 'vi' => 'View',
1121: 'ed' => 'Edit');
1122: my $buttons=(<<BUTTONS);
1123: $cleanbut
1124: <input type="submit" name="savethisfile" value="$lt{'st'}" />
1125: <input type="submit" name="viewmode" value="$lt{'vi'}" />
1126: BUTTONS
1127: my $editfooter=(<<ENDFOOTER);
1128: <hr />
1129: <a name="editsection" />
1130: <form method="post">
1131: $xml_help
1132: <input type="hidden" name="editmode" value="$lt{'ed'}" />
1133: $buttons<br />
1134: <textarea cols="80" rows="40" name="filecont">$filecontents</textarea>
1135: <br />$buttons
1136: <br />
1137: </form>
1138: $titledisplay
1139: ENDFOOTER
1140: # $result=~s/(\<body[^\>]*\>)/$1$editheader/is;
1141: $result=~s/(\<\/body\>)/$editfooter/is;
1142: return $result;
1143: }
1144:
1145: sub get_target {
1146: my $viewgrades=&Apache::lonnet::allowed('vgr',$ENV{'request.course.id'});
1147: if ( $ENV{'request.state'} eq 'published') {
1148: if ( defined($ENV{'form.grade_target'})
1149: && ($viewgrades == 'F' )) {
1150: return ($ENV{'form.grade_target'});
1151: } elsif (defined($ENV{'form.grade_target'})) {
1152: if (($ENV{'form.grade_target'} eq 'web') ||
1153: ($ENV{'form.grade_target'} eq 'tex') ) {
1154: return $ENV{'form.grade_target'}
1155: } else {
1156: return 'web';
1157: }
1158: } else {
1159: return 'web';
1160: }
1161: } elsif ($ENV{'request.state'} eq 'construct') {
1162: if ( defined($ENV{'form.grade_target'})) {
1163: return ($ENV{'form.grade_target'});
1164: } else {
1165: return 'web';
1166: }
1167: } else {
1168: return 'web';
1169: }
1170: }
1171:
1172: sub handler {
1173: my $request=shift;
1174:
1175: my $target=&get_target();
1176:
1177: $Apache::lonxml::debug=$ENV{'user.debug'};
1178:
1179: if ($ENV{'browser.mathml'}) {
1180: &Apache::loncommon::content_type($request,'text/xml');
1181: } else {
1182: &Apache::loncommon::content_type($request,'text/html');
1183: }
1184: &Apache::loncommon::no_cache($request);
1185: $request->send_http_header;
1186:
1187: return OK if $request->header_only;
1188:
1189:
1190: my $file=&Apache::lonnet::filelocation("",$request->uri);
1191: my $filetype;
1192: if ($file =~ /\.sty$/) {
1193: $filetype='sty';
1194: } else {
1195: $filetype='html';
1196: }
1197: #
1198: # Edit action? Save file.
1199: #
1200: unless ($ENV{'request.state'} eq 'published') {
1201: if (($ENV{'form.savethisfile'}) || ($ENV{'form.attemptclean'})) {
1202: if (&storefile($file,$ENV{'form.filecont'})) {
1203: $request->print("<font COLOR=\"#0000FF\">Updated: ". strftime("%d %b %H:%M:%S",localtime())." </font>");
1204: }
1205: }
1206: }
1207: my %mystyle;
1208: my $result = '';
1209: my $filecontents=&Apache::lonnet::getfile($file);
1210: if ($filecontents eq -1) {
1211: $result=(<<ENDNOTFOUND);
1212: <html>
1213: <head>
1214: <title>File not found</title>
1215: </head>
1216: <body bgcolor="#FFFFFF">
1217: <b>File not found: $file</b>
1218: </body>
1219: </html>
1220: ENDNOTFOUND
1221: $filecontents='';
1222: if ($ENV{'request.state'} ne 'published') {
1223: if ($filetype eq 'sty') {
1224: $filecontents=&createnewsty();
1225: } else {
1226: $filecontents=&createnewhtml();
1227: }
1228: $ENV{'form.editmode'}='Edit'; #force edit mode
1229: }
1230: } else {
1231: unless ($ENV{'request.state'} eq 'published') {
1232: if ($ENV{'form.attemptclean'}) {
1233: $filecontents=&htmlclean($filecontents,1);
1234: }
1235: #
1236: # we are in construction space, see if edit mode forced
1237: &Apache::loncommon::get_unprocessed_cgi
1238: ($ENV{'QUERY_STRING'},['editmode']);
1239: }
1240: if (!$ENV{'form.editmode'} || $ENV{'form.viewmode'}) {
1241: $result = &Apache::lonxml::xmlparse($request,$target,$filecontents,
1242: '',%mystyle);
1243: }
1244: }
1245:
1246: #
1247: # Edit action? Insert editing commands
1248: #
1249: unless ($ENV{'request.state'} eq 'published') {
1250: if ($ENV{'form.editmode'} && (!($ENV{'form.viewmode'}))) {
1251: my $displayfile=$request->uri;
1252: $displayfile=~s/^\/[^\/]*//;
1253: $result='<html><body bgcolor="#FFFFFF"><h3>'.$displayfile.
1254: '</h3></body></html>';
1255: $result=&inserteditinfo($result,$filecontents,$filetype);
1256: }
1257: }
1258: if ($filetype eq 'html') { writeallows($request->uri); }
1259:
1260:
1261:
1262: $request->print($result);
1263:
1264: return OK;
1265: }
1266:
1267: sub display_title {
1268: my $result;
1269: if ($ENV{'request.state'} eq 'construct') {
1270: my $title=&Apache::lonnet::gettitle();
1271: if (!defined($title) || $title eq '') {
1272: $title = $ENV{'request.filename'};
1273: $title = substr($title, rindex($title, '/') + 1);
1274: }
1275: $result = "<script type='text/javascript'>top.document.title = '$title - LON-CAPA Construction Space';</script>";
1276: }
1277: return $result;
1278: }
1279:
1280: sub debug {
1281: if ($Apache::lonxml::debug eq 1) {
1282: $|=1;
1283: print('<font size="-2"<pre>DEBUG:'.&HTML::Entities::encode($_[0])."</pre></font>\n");
1284: }
1285: }
1286:
1287: sub error {
1288: $errorcount++;
1289: if (($Apache::lonxml::debug eq 1) || ($ENV{'request.state'} eq 'construct') ) {
1290: # If printing in construction space, put the error inside <pre></pre>
1291: print "<b>ERROR:</b>".join("\n",@_)."\n";
1292: } else {
1293: print "<b>An Error occured while processing this resource. The instructor has been notified.</b> <br />";
1294: #notify author
1295: &Apache::lonmsg::author_res_msg($ENV{'request.filename'},join('<br />',@_));
1296: #notify course
1297: if ( $ENV{'request.course.id'} ) {
1298: my (undef,%users)=&Apache::lonfeedback::decide_receiver(undef,0,1,1,1);
1299: my $declutter=&Apache::lonnet::declutter($ENV{'request.filename'});
1300: foreach (keys %users) {
1301: my ($user,$domain) = split(/:/, $_);
1302: &Apache::lonmsg::user_normal_msg($user,$domain,
1303: "Error [$declutter]",join('<br />',@_));
1304: }
1305: }
1306:
1307: #FIXME probably shouldn't have me get everything forever.
1308: &Apache::lonmsg::user_normal_msg('albertel','msu',"Error in $ENV{'request.filename'}",join('<br />',@_));
1309: #&Apache::lonmsg::user_normal_msg('albertel','103',"Error in $ENV{'request.filename'}",$_[0]);
1310: }
1311: }
1312:
1313: sub warning {
1314: $warningcount++;
1315:
1316: if ($ENV{'form.grade_target'} ne 'tex') {
1317: if ($ENV{'request.state'} eq 'construct' || $Apache::lonxml::debug) {
1318: print "<b>W</b>ARNING<b>:</b>".join('<br />',@_)."<br />\n";
1319: }
1320: }
1321: }
1322:
1323: sub get_param {
1324: my ($param,$parstack,$safeeval,$context,$case_insensitive) = @_;
1325: if ( ! $context ) { $context = -1; }
1326: my $args ='';
1327: if ( $#$parstack > (-2-$context) ) { $args=$$parstack[$context]; }
1328: if ( ! $args ) { return undef; }
1329: if ( $case_insensitive ) {
1330: if ($args =~ s/(my \$)(\Q$param\E)(=\")/$1.lc($2).$3/ei) {
1331: return &Apache::run::run("{$args;".'return $'.$param.'}',
1332: $safeeval); #'
1333: } else {
1334: return undef;
1335: }
1336: } else {
1337: if ( $args =~ /my \$\Q$param\E=\"/ ) {
1338: return &Apache::run::run("{$args;".'return $'.$param.'}',
1339: $safeeval); #'
1340: } else {
1341: return undef;
1342: }
1343: }
1344: }
1345:
1346: sub get_param_var {
1347: my ($param,$parstack,$safeeval,$context,$case_insensitive) = @_;
1348: if ( ! $context ) { $context = -1; }
1349: my $args ='';
1350: if ( $#$parstack > (-2-$context) ) { $args=$$parstack[$context]; }
1351: &Apache::lonxml::debug("Args are $args param is $param");
1352: if ($case_insensitive) {
1353: if (! ($args=~s/(my \$)(\Q$param\E)(=\")/$1.lc($2).$3/ei)) {
1354: return undef;
1355: }
1356: } elsif ( $args !~ /my \$\Q$param\E=\"/ ) { return undef; }
1357: my $value=&Apache::run::run("{$args;".'return $'.$param.'}',$safeeval); #'
1358: &Apache::lonxml::debug("first run is $value");
1359: if ($value =~ /^[\$\@\%]\w+$/) {
1360: &Apache::lonxml::debug("doing second");
1361: my @result=&Apache::run::run("return $value",$safeeval,1);
1362: if (!defined($result[0])) {
1363: return $value
1364: } else {
1365: if (wantarray) { return @result; } else { return $result[0]; }
1366: }
1367: } else {
1368: return $value;
1369: }
1370: }
1371:
1372: sub register_insert {
1373: my @data = split /\n/, &Apache::lonnet::getfile('/home/httpd/lonTabs/insertlist.tab');
1374: my $i;
1375: my $tagnum=0;
1376: my @order;
1377: for ($i=0;$i < $#data; $i++) {
1378: my $line = $data[$i];
1379: if ( $line =~ /^\#/ || $line =~ /^\s*\n/) { next; }
1380: if ( $line =~ /TABLE/ ) { last; }
1381: my ($tag,$descrip,$color,$function,$show,$helpfile,$helpdesc) = split(/,/, $line);
1382: if ($tag) {
1383: $insertlist{"$tagnum.tag"} = $tag;
1384: $insertlist{"$tagnum.description"} = $descrip;
1385: $insertlist{"$tagnum.color"} = $color;
1386: $insertlist{"$tagnum.function"} = $function;
1387: if (!defined($show)) { $show='yes'; }
1388: $insertlist{"$tagnum.show"}= $show;
1389: $insertlist{"$tagnum.helpfile"} = $helpfile;
1390: $insertlist{"$tagnum.helpdesc"} = $helpdesc;
1391: $insertlist{"$tag.num"}=$tagnum;
1392: $tagnum++;
1393: }
1394: }
1395: $i++; #skipping TABLE line
1396: $tagnum = 0;
1397: for (;$i < $#data;$i++) {
1398: my $line = $data[$i];
1399: my ($mnemonic,@which) = split(/ +/,$line);
1400: my $tag = $insertlist{"$tagnum.tag"};
1401: for (my $j=0;$j <=$#which;$j++) {
1402: if ( $which[$j] eq 'Y' ) {
1403: if ($insertlist{"$j.show"} ne 'no') {
1404: push(@{ $insertlist{"$tag.which"} },$j);
1405: }
1406: }
1407: }
1408: $tagnum++;
1409: }
1410: }
1411:
1412: sub description {
1413: my ($token)=@_;
1414: my $tagnum;
1415: my $tag=$token->[1];
1416: foreach my $namespace (reverse @Apache::lonxml::namespace) {
1417: my $testtag=$namespace.'::'.$tag;
1418: $tagnum=$insertlist{"$testtag.num"};
1419: if (defined($tagnum)) { last; }
1420: }
1421: if (!defined ($tagnum)) { $tagnum=$Apache::lonxml::insertlist{"$tag.num"}; }
1422: return $insertlist{$tagnum.'.description'};
1423: }
1424:
1425: # Returns a list containing the help file, and the description
1426: sub helpinfo {
1427: my ($token)=@_;
1428: my $tagnum;
1429: my $tag=$token->[1];
1430: foreach my $namespace (reverse @Apache::lonxml::namespace) {
1431: my $testtag=$namespace.'::'.$tag;
1432: $tagnum=$insertlist{"$testtag.num"};
1433: if (defined($tagnum)) { last; }
1434: }
1435: if (!defined ($tagnum)) { $tagnum=$Apache::lonxml::insertlist{"$tag.num"}; }
1436: return ($insertlist{$tagnum.'.helpfile'}, $insertlist{$tagnum.'.helpdesc'});
1437: }
1438:
1439: # ----------------------------------------------------------------- whichuser
1440: # returns a list of $symb, $courseid, $domain, $name that is correct for
1441: # calls to lonnet functions for this setup.
1442: # - looks for form.grade_ parameters
1443: sub whichuser {
1444: my ($passedsymb)=@_;
1445: my ($symb,$courseid,$domain,$name,$publicuser);
1446: if (defined($ENV{'form.grade_symb'})) {
1447: my $tmp_courseid=$ENV{'form.grade_courseid'};
1448: my $allowed=&Apache::lonnet::allowed('vgr',$tmp_courseid);
1449: if ($allowed) {
1450: $symb=$ENV{'form.grade_symb'};
1451: $courseid=$ENV{'form.grade_courseid'};
1452: $domain=$ENV{'form.grade_domain'};
1453: $name=$ENV{'form.grade_username'};
1454: }
1455: } else {
1456: if (!$passedsymb) {
1457: $symb=&Apache::lonnet::symbread();
1458: } else {
1459: $symb=$passedsymb;
1460: }
1461: $courseid=$ENV{'request.course.id'};
1462: $domain=$ENV{'user.domain'};
1463: $name=$ENV{'user.name'};
1464: if ($name eq 'public' && $domain eq 'public') {
1465: if (!defined($ENV{'form.username'})) {
1466: $ENV{'form.username'}.=time.rand(10000000);
1467: }
1468: $name.=$ENV{'form.username'};
1469: }
1470: }
1471: return ($symb,$courseid,$domain,$name,$publicuser);
1472: }
1473:
1474: 1;
1475: __END__
1476:
1477:
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