1: # The LearningOnline Network with CAPA
2: # XML Parser Module
3: #
4: # $Id: lonxml.pm,v 1.281 2003/09/27 04:08:56 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: sub xmlbegin {
167: my $output='';
168: if ($ENV{'browser.mathml'}) {
169: $output='<?xml version="1.0"?>'
170: .'<?xml-stylesheet type="text/css" href="/adm/MathML/mathml.css"?>'
171: .'<!DOCTYPE html SYSTEM "/adm/MathML/mathml.dtd" '
172: .'[<!ENTITY mathns "http://www.w3.org/1998/Math/MathML">]>'
173: .'<html xmlns:math="http://www.w3.org/1998/Math/MathML" '
174: .'xmlns="http://www.w3.org/TR/REC-html40">';
175: } else {
176: $output='<html>';
177: }
178: return $output;
179: }
180:
181: sub xmlend {
182: my $mode='xml';
183: my $status='OPEN';
184: if ($Apache::lonhomework::parsing_a_problem) {
185: $mode='problem';
186: $status=$Apache::inputtags::status[-1];
187: }
188: return &Apache::lonfeedback::list_discussion().'</html>';
189: }
190:
191: sub tokeninputfield {
192: my $defhost=$Apache::lonnet::perlvar{'lonHostID'};
193: $defhost=~tr/a-z/A-Z/;
194: return (<<ENDINPUTFIELD)
195: <script type="text/javascript">
196: function updatetoken() {
197: var comp=new Array;
198: var barcode=unescape(document.tokeninput.barcode.value);
199: comp=barcode.split('*');
200: if (typeof(comp[0])!="undefined") {
201: document.tokeninput.codeone.value=comp[0];
202: }
203: if (typeof(comp[1])!="undefined") {
204: document.tokeninput.codetwo.value=comp[1];
205: }
206: if (typeof(comp[2])!="undefined") {
207: comp[2]=comp[2].toUpperCase();
208: document.tokeninput.codethree.value=comp[2];
209: }
210: document.tokeninput.barcode.value='';
211: }
212: </script>
213: <form method="post" name="tokeninput">
214: <table border="2" bgcolor="#FFFFBB">
215: <tr><th>DocID Checkin</th></tr>
216: <tr><td>
217: <table>
218: <tr>
219: <td>Scan in Barcode</td>
220: <td><input type="text" size="22" name="barcode"
221: onChange="updatetoken()"/></td>
222: </tr>
223: <tr><td><i>or</i> Type in DocID</td>
224: <td>
225: <input type="text" size="5" name="codeone" />
226: <b><font size="+2">*</font></b>
227: <input type="text" size="5" name="codetwo" />
228: <b><font size="+2">*</font></b>
229: <input type="text" size="10" name="codethree" value="$defhost"
230: onChange="this.value=this.value.toUpperCase()" />
231: </td></tr>
232: </table>
233: </td></tr>
234: <tr><td><input type="submit" value="Check in DocID" /></td></tr>
235: </table>
236: </form>
237: ENDINPUTFIELD
238: }
239:
240: sub maketoken {
241: my ($symb,$tuname,$tudom,$tcrsid)=@_;
242: unless ($symb) {
243: $symb=&Apache::lonnet::symbread();
244: }
245: unless ($tuname) {
246: $tuname=$ENV{'user.name'};
247: $tudom=$ENV{'user.domain'};
248: $tcrsid=$ENV{'request.course.id'};
249: }
250:
251: return &Apache::lonnet::checkout($symb,$tuname,$tudom,$tcrsid);
252: }
253:
254: sub printtokenheader {
255: my ($target,$token,$tsymb,$tcrsid,$tudom,$tuname)=@_;
256: unless ($token) { return ''; }
257:
258: my ($symb,$courseid,$domain,$name) = &Apache::lonxml::whichuser();
259: unless ($tsymb) {
260: $tsymb=$symb;
261: }
262: unless ($tuname) {
263: $tuname=$name;
264: $tudom=$domain;
265: $tcrsid=$courseid;
266: }
267:
268: my %reply=&Apache::lonnet::get('environment',
269: ['firstname','middlename','lastname','generation'],
270: $tudom,$tuname);
271: my $plainname=$reply{'firstname'}.' '.
272: $reply{'middlename'}.' '.
273: $reply{'lastname'}.' '.
274: $reply{'generation'};
275:
276: if ($target eq 'web') {
277: my %idhash=&Apache::lonnet::idrget($tudom,($tuname));
278: return
279: '<img align="right" src="/cgi-bin/barcode.png?encode='.$token.'" />'.
280: 'Checked out for '.$plainname.
281: '<br />User: '.$tuname.' at '.$tudom.
282: '<br />ID: '.$idhash{$tuname}.
283: '<br />CourseID: '.$tcrsid.
284: '<br />Course: '.$ENV{'course.'.$tcrsid.'.description'}.
285: '<br />DocID: '.$token.
286: '<br />Time: '.localtime().'<hr />';
287: } else {
288: return $token;
289: }
290: }
291:
292: sub fontsettings() {
293: my $headerstring='';
294: if (($ENV{'browser.os'} eq 'mac') && (!$ENV{'browser.mathml'})) {
295: $headerstring.=
296: '<meta Content-Type="text/html; charset=x-mac-roman">';
297: } elsif (!$ENV{'browser.mathml'} && $ENV{'browser.unicode'}) {
298: $headerstring.=
299: '<meta http-equiv="Content-Type" content="text/html; charset=utf-8" />';
300: }
301: return $headerstring;
302: }
303:
304: sub printalltags {
305: my $temp;
306: foreach $temp (sort keys %Apache::lonxml::alltags) {
307: &Apache::lonxml::debug("$temp -- ".
308: join(',',@{ $Apache::lonxml::alltags{$temp} }));
309: }
310: }
311:
312: sub xmlparse {
313: my ($request,$target,$content_file_string,$safeinit,%style_for_target) = @_;
314:
315: &setup_globals($request,$target);
316: &Apache::inputtags::initialize_inputtags();
317: &Apache::outputtags::initialize_outputtags();
318: &Apache::edit::initialize_edit();
319:
320: #
321: # do we have a course style file?
322: #
323:
324: if ($ENV{'request.course.id'} && $ENV{'request.state'} ne 'construct') {
325: my $bodytext=
326: $ENV{'course.'.$ENV{'request.course.id'}.'.default_xml_style'};
327: if ($bodytext) {
328: my $location=&Apache::lonnet::filelocation('',$bodytext);
329: my $styletext=&Apache::lonnet::getfile($location);
330: if ($styletext ne '-1') {
331: %style_for_target = (%style_for_target,
332: &Apache::style::styleparser($target,$styletext));
333: }
334: }
335: }
336: #&printalltags();
337: my @pars = ();
338: my $pwd=$ENV{'request.filename'};
339: $pwd =~ s:/[^/]*$::;
340: &newparser(\@pars,\$content_file_string,$pwd);
341:
342: my $safeeval = new Safe;
343: my $safehole = new Safe::Hole;
344: &init_safespace($target,$safeeval,$safehole,$safeinit);
345: #-------------------- Redefinition of the target in the case of compound target
346:
347: ($target, my @tenta) = split('&&',$target);
348:
349: my @stack = ();
350: my @parstack = ();
351: &initdepth;
352:
353: my $finaloutput = &inner_xmlparse($target,\@stack,\@parstack,\@pars,
354: $safeeval,\%style_for_target);
355:
356: if ($ENV{'request.uri'}) {
357: &writeallows($ENV{'request.uri'});
358: }
359: &do_registered_ssi();
360: if ($Apache::lonxml::counter_changed) { &store_counter() }
361: return $finaloutput;
362: }
363:
364: sub htmlclean {
365: my ($raw,$full)=@_;
366:
367: my $tree = HTML::TreeBuilder->new;
368: $tree->ignore_unknown(0);
369:
370: $tree->parse($raw);
371:
372: my $output= $tree->as_HTML(undef,' ');
373:
374: $output=~s/\<(br|hr|img|meta|allow)(.*?)\>/\<$1$2 \/\>/gis;
375: $output=~s/\<\/(br|hr|img|meta|allow)\>//gis;
376: unless ($full) {
377: $output=~s/\<[\/]*(body|head|html)\>//gis;
378: }
379:
380: $tree = $tree->delete;
381:
382: return $output;
383: }
384:
385: sub latex_special_symbols {
386: my ($string,$where)=@_;
387: if ($where eq 'header') {
388: $string =~ s/(\\|_|\^)/ /g;
389: $string =~ s/(\$|%|\#|&|\{|\})/\\$1/g;
390: $string =~ s/_/ /g;
391: } else {
392: $string=~s/\\ /\\char92 /g;
393: $string=~s/\^/\\char94 /g;
394: $string=~s/\~/\\char126 /g;
395: $string=~s/(&[^A-Za-z\#])/\\$1/g;
396: $string=~s/([^&])\#/$1\\#/g;
397: $string=~s/(\$|_|{|})/\\$1/g;
398: $string=~s/\\char92 /\\texttt{\\char92}/g;
399: $string=~s/(>|<)/\$$1\$/g; #more or less
400: if ($string=~m/\d%/) {$string =~ s/(\d)%/$1\\%/g;} #percent after digit
401: if ($string=~m/\s%/) {$string =~ s/(\s)%/$1\\%/g;} #percent after space
402: if ($string eq '%.') {$string = '\%.';} #percent at the end of statement
403: }
404: return $string;
405: }
406:
407: sub inner_xmlparse {
408: my ($target,$stack,$parstack,$pars,$safeeval,$style_for_target)=@_;
409: my $finaloutput = '';
410: my $result;
411: my $token;
412: my $dontpop=0;
413: while ( $#$pars > -1 ) {
414: while ($token = $$pars['-1']->get_token) {
415: if (($token->[0] eq 'T') || ($token->[0] eq 'C') ) {
416: if ($metamode<1) {
417: my $text=$token->[1];
418: if ($token->[0] eq 'C' && $target eq 'tex') {
419: $text = '';
420: # $text = '%'.$text."\n";
421: }
422: $result.=$text;
423: }
424: } elsif (($token->[0] eq 'D')) {
425: if ($metamode<1 && $target eq 'web') {
426: my $text=$token->[1];
427: $result.=$text;
428: }
429: } elsif ($token->[0] eq 'PI') {
430: if ($metamode<1 && $target eq 'web') {
431: $result=$token->[2];
432: }
433: } elsif ($token->[0] eq 'S') {
434: # add tag to stack
435: push (@$stack,$token->[1]);
436: # add parameters list to another stack
437: push (@$parstack,&parstring($token));
438: &increasedepth($token);
439: if ($Apache::lonxml::usestyle &&
440: exists($$style_for_target{$token->[1]})) {
441: $Apache::lonxml::usestyle=0;
442: my $string=$$style_for_target{$token->[1]}.
443: '<LONCAPA_INTERNAL_TURN_STYLE_ON />';
444: &Apache::lonxml::newparser($pars,\$string);
445: $Apache::lonxml::style_values=$$parstack[-1];
446: $Apache::lonxml::style_end_values=$$parstack[-1];
447: } else {
448: $result = &callsub("start_$token->[1]", $target, $token, $stack,
449: $parstack, $pars, $safeeval, $style_for_target);
450: }
451: } elsif ($token->[0] eq 'E') {
452: if ($Apache::lonxml::usestyle &&
453: exists($$style_for_target{'/'."$token->[1]"})) {
454: $Apache::lonxml::usestyle=0;
455: my $string=$$style_for_target{'/'.$token->[1]}.
456: '<LONCAPA_INTERNAL_TURN_STYLE_ON end="'.$token->[1].'" />';
457: &Apache::lonxml::newparser($pars,\$string);
458: $Apache::lonxml::style_values=$Apache::lonxml::style_end_values;
459: $Apache::lonxml::style_end_values='';
460: $dontpop=1;
461: } else {
462: #clear out any tags that didn't end
463: while ($token->[1] ne $$stack['-1'] && ($#$stack > -1)) {
464: my $lasttag=$$stack[-1];
465: if ($token->[1] =~ /^$lasttag$/i) {
466: &Apache::lonxml::warning('Using tag </'.$token->[1].'> on line '.$token->[3].' as end tag to <'.$$stack[-1].'>');
467: last;
468: } else {
469: &Apache::lonxml::warning('Found tag </'.$token->[1].'> on line '.$token->[3].' when looking for </'.$$stack[-1].'> in file');
470: &end_tag($stack,$parstack,$token);
471: }
472: }
473: $result = &callsub("end_$token->[1]", $target, $token, $stack,
474: $parstack, $pars,$safeeval, $style_for_target);
475: }
476: } else {
477: &Apache::lonxml::error("Unknown token event :$token->[0]:$token->[1]:");
478: }
479: #evaluate variable refs in result
480: if ($result ne "") {
481: my $extras;
482: if (!$Apache::lonxml::usestyle) {
483: $extras=$Apache::lonxml::style_values;
484: }
485: if ( $#$parstack > -1 ) {
486: $result=&Apache::run::evaluate($result,$safeeval,$extras.$$parstack[-1]);
487: } else {
488: $result= &Apache::run::evaluate($result,$safeeval,$extras);
489: }
490: }
491: if (($token->[0] eq 'T') || ($token->[0] eq 'C') || ($token->[0] eq 'D') ) {
492: #Style file definitions should be correct
493: if ($target eq 'tex' && ($Apache::lonxml::usestyle)) {
494: $result=&latex_special_symbols($result);
495: }
496: }
497:
498: # Encode any high ASCII characters
499: # if (!$Apache::lonxml::prevent_entity_encode) {
500: # $result=&HTML::Entities::encode($result,"\200-\377");
501: # }
502: if ($Apache::lonxml::redirection) {
503: $Apache::lonxml::outputstack['-1'] .= $result;
504: } else {
505: $finaloutput.=$result;
506: }
507: $result = '';
508:
509: if ($token->[0] eq 'E' && !$dontpop) {
510: &end_tag($stack,$parstack,$token);
511: }
512: $dontpop=0;
513: }
514: if ($#$pars > -1) {
515: pop @$pars;
516: pop @Apache::lonxml::pwd;
517: }
518: }
519:
520: # if ($target eq 'meta') {
521: # $finaloutput.=&endredirection;
522: # }
523:
524:
525: if (($ENV{'QUERY_STRING'}) && ($target eq 'web')) {
526: $finaloutput=&afterburn($finaloutput);
527: }
528: return $finaloutput;
529: }
530:
531: sub callsub {
532: my ($sub,$target,$token,$tagstack,$parstack,$parser,$safeeval,$style)=@_;
533: my $currentstring='';
534: my $nodefault;
535: {
536: my $sub1;
537: no strict 'refs';
538: my $tag=$token->[1];
539: # get utterly rid of extended html tags
540: if ($tag=~/^x\-/i) { return ''; }
541: my $space=$Apache::lonxml::alltags{$tag}[-1];
542: if (!$space) {
543: $tag=~tr/A-Z/a-z/;
544: $sub=~tr/A-Z/a-z/;
545: $space=$Apache::lonxml::alltags{$tag}[-1]
546: }
547:
548: my $deleted=0;
549: $Apache::lonxml::curdepth=join('_',@Apache::lonxml::depthcounter);
550: if (($token->[0] eq 'S') && ($target eq 'modified')) {
551: $deleted=&Apache::edit::handle_delete($space,$target,$token,$tagstack,
552: $parstack,$parser,$safeeval,
553: $style);
554: }
555: if (!$deleted) {
556: if ($space) {
557: #&Apache::lonxml::debug("Calling sub $sub in $space $metamode");
558: $sub1="$space\:\:$sub";
559: ($currentstring,$nodefault) = &$sub1($target,$token,$tagstack,
560: $parstack,$parser,$safeeval,
561: $style);
562: } else {
563: #&Apache::lonxml::debug("NOT Calling sub $sub in $space $metamode");
564: if ($metamode <1) {
565: if (defined($token->[4]) && ($metamode < 1)) {
566: $currentstring = $token->[4];
567: } else {
568: $currentstring = $token->[2];
569: }
570: }
571: }
572: # &Apache::lonxml::debug("nodefalt:$nodefault:");
573: if ($currentstring eq '' && $nodefault eq '') {
574: if ($target eq 'edit') {
575: #&Apache::lonxml::debug("doing default edit for $token->[1]");
576: if ($token->[0] eq 'S') {
577: $currentstring = &Apache::edit::tag_start($target,$token);
578: } elsif ($token->[0] eq 'E') {
579: $currentstring = &Apache::edit::tag_end($target,$token);
580: }
581: } elsif ($target eq 'modified') {
582: if ($token->[0] eq 'S') {
583: $currentstring = $token->[4];
584: $currentstring.=&Apache::edit::handle_insert();
585: } elsif ($token->[0] eq 'E') {
586: $currentstring = $token->[2];
587: $currentstring.=&Apache::edit::handle_insertafter($token->[1]);
588: } else {
589: $currentstring = $token->[2];
590: }
591: }
592: }
593: }
594: use strict 'refs';
595: }
596: return $currentstring;
597: }
598:
599: sub setup_globals {
600: my ($request,$target)=@_;
601: $Apache::lonxml::request=$request;
602: $Apache::lonxml::registered = 0;
603: $errorcount=0;
604: $warningcount=0;
605: $Apache::lonxml::default_homework_loaded=0;
606: $Apache::lonxml::usestyle=1;
607: &init_counter();
608: @Apache::lonxml::pwd=();
609: @Apache::lonxml::extlinks=();
610: @Apache::lonxml::ssi_info=();
611: if ($target eq 'meta') {
612: $Apache::lonxml::redirection = 0;
613: $Apache::lonxml::metamode = 1;
614: $Apache::lonxml::evaluate = 1;
615: $Apache::lonxml::import = 0;
616: } elsif ($target eq 'answer') {
617: $Apache::lonxml::redirection = 0;
618: $Apache::lonxml::metamode = 1;
619: $Apache::lonxml::evaluate = 1;
620: $Apache::lonxml::import = 1;
621: } elsif ($target eq 'grade') {
622: &startredirection;
623: $Apache::lonxml::metamode = 0;
624: $Apache::lonxml::evaluate = 1;
625: $Apache::lonxml::import = 1;
626: } elsif ($target eq 'modified') {
627: $Apache::lonxml::redirection = 0;
628: $Apache::lonxml::metamode = 0;
629: $Apache::lonxml::evaluate = 0;
630: $Apache::lonxml::import = 0;
631: } elsif ($target eq 'edit') {
632: $Apache::lonxml::redirection = 0;
633: $Apache::lonxml::metamode = 0;
634: $Apache::lonxml::evaluate = 0;
635: $Apache::lonxml::import = 0;
636: } elsif ($target eq 'analyze') {
637: $Apache::lonxml::redirection = 0;
638: $Apache::lonxml::metamode = 0;
639: $Apache::lonxml::evaluate = 1;
640: $Apache::lonxml::import = 1;
641: } else {
642: $Apache::lonxml::redirection = 0;
643: $Apache::lonxml::metamode = 0;
644: $Apache::lonxml::evaluate = 1;
645: $Apache::lonxml::import = 1;
646: }
647: }
648:
649: sub init_safespace {
650: my ($target,$safeeval,$safehole,$safeinit) = @_;
651: $safeeval->permit("entereval");
652: $safeeval->permit(":base_math");
653: $safeeval->permit("sort");
654: $safeeval->deny(":base_io");
655: $safehole->wrap(\&Apache::scripttag::xmlparse,$safeeval,'&xmlparse');
656: $safehole->wrap(\&Apache::outputtags::multipart,$safeeval,'&multipart');
657: $safehole->wrap(\&Apache::lonnet::EXT,$safeeval,'&EXT');
658:
659: $safehole->wrap(\&Math::Cephes::asin,$safeeval,'&asin');
660: $safehole->wrap(\&Math::Cephes::acos,$safeeval,'&acos');
661: $safehole->wrap(\&Math::Cephes::atan,$safeeval,'&atan');
662: $safehole->wrap(\&Math::Cephes::sinh,$safeeval,'&sinh');
663: $safehole->wrap(\&Math::Cephes::cosh,$safeeval,'&cosh');
664: $safehole->wrap(\&Math::Cephes::tanh,$safeeval,'&tanh');
665: $safehole->wrap(\&Math::Cephes::asinh,$safeeval,'&asinh');
666: $safehole->wrap(\&Math::Cephes::acosh,$safeeval,'&acosh');
667: $safehole->wrap(\&Math::Cephes::atanh,$safeeval,'&atanh');
668: $safehole->wrap(\&Math::Cephes::erf,$safeeval,'&erf');
669: $safehole->wrap(\&Math::Cephes::erfc,$safeeval,'&erfc');
670: $safehole->wrap(\&Math::Cephes::j0,$safeeval,'&j0');
671: $safehole->wrap(\&Math::Cephes::j1,$safeeval,'&j1');
672: $safehole->wrap(\&Math::Cephes::jn,$safeeval,'&jn');
673: $safehole->wrap(\&Math::Cephes::jv,$safeeval,'&jv');
674: $safehole->wrap(\&Math::Cephes::y0,$safeeval,'&y0');
675: $safehole->wrap(\&Math::Cephes::y1,$safeeval,'&y1');
676: $safehole->wrap(\&Math::Cephes::yn,$safeeval,'&yn');
677: $safehole->wrap(\&Math::Cephes::yv,$safeeval,'&yv');
678:
679: $safehole->wrap(\&Math::Cephes::bdtr ,$safeeval,'&bdtr' );
680: $safehole->wrap(\&Math::Cephes::bdtrc ,$safeeval,'&bdtrc' );
681: $safehole->wrap(\&Math::Cephes::bdtri ,$safeeval,'&bdtri' );
682: $safehole->wrap(\&Math::Cephes::btdtr ,$safeeval,'&btdtr' );
683: $safehole->wrap(\&Math::Cephes::chdtr ,$safeeval,'&chdtr' );
684: $safehole->wrap(\&Math::Cephes::chdtrc,$safeeval,'&chdtrc');
685: $safehole->wrap(\&Math::Cephes::chdtri,$safeeval,'&chdtri');
686: $safehole->wrap(\&Math::Cephes::fdtr ,$safeeval,'&fdtr' );
687: $safehole->wrap(\&Math::Cephes::fdtrc ,$safeeval,'&fdtrc' );
688: $safehole->wrap(\&Math::Cephes::fdtri ,$safeeval,'&fdtri' );
689: $safehole->wrap(\&Math::Cephes::gdtr ,$safeeval,'&gdtr' );
690: $safehole->wrap(\&Math::Cephes::gdtrc ,$safeeval,'&gdtrc' );
691: $safehole->wrap(\&Math::Cephes::nbdtr ,$safeeval,'&nbdtr' );
692: $safehole->wrap(\&Math::Cephes::nbdtrc,$safeeval,'&nbdtrc');
693: $safehole->wrap(\&Math::Cephes::nbdtri,$safeeval,'&nbdtri');
694: $safehole->wrap(\&Math::Cephes::ndtr ,$safeeval,'&ndtr' );
695: $safehole->wrap(\&Math::Cephes::ndtri ,$safeeval,'&ndtri' );
696: $safehole->wrap(\&Math::Cephes::pdtr ,$safeeval,'&pdtr' );
697: $safehole->wrap(\&Math::Cephes::pdtrc ,$safeeval,'&pdtrc' );
698: $safehole->wrap(\&Math::Cephes::pdtri ,$safeeval,'&pdtri' );
699: $safehole->wrap(\&Math::Cephes::stdtr ,$safeeval,'&stdtr' );
700: $safehole->wrap(\&Math::Cephes::stdtri,$safeeval,'&stdtri');
701:
702: # $safehole->wrap(\&Math::Cephes::new_fract,$safeeval,'&new_fract');
703: # $safehole->wrap(\&Math::Cephes::radd,$safeeval,'&radd');
704: # $safehole->wrap(\&Math::Cephes::rsub,$safeeval,'&rsub');
705: # $safehole->wrap(\&Math::Cephes::rmul,$safeeval,'&rmul');
706: # $safehole->wrap(\&Math::Cephes::rdiv,$safeeval,'&rdiv');
707: # $safehole->wrap(\&Math::Cephes::euclid,$safeeval,'&euclid');
708:
709: $safehole->wrap(\&Math::Random::random_beta,$safeeval,'&math_random_beta');
710: $safehole->wrap(\&Math::Random::random_chi_square,$safeeval,'&math_random_chi_square');
711: $safehole->wrap(\&Math::Random::random_exponential,$safeeval,'&math_random_exponential');
712: $safehole->wrap(\&Math::Random::random_f,$safeeval,'&math_random_f');
713: $safehole->wrap(\&Math::Random::random_gamma,$safeeval,'&math_random_gamma');
714: $safehole->wrap(\&Math::Random::random_multivariate_normal,$safeeval,'&math_random_multivariate_normal');
715: $safehole->wrap(\&Math::Random::random_multinomial,$safeeval,'&math_random_multinomial');
716: $safehole->wrap(\&Math::Random::random_noncentral_chi_square,$safeeval,'&math_random_noncentral_chi_square');
717: $safehole->wrap(\&Math::Random::random_noncentral_f,$safeeval,'&math_random_noncentral_f');
718: $safehole->wrap(\&Math::Random::random_normal,$safeeval,'&math_random_normal');
719: $safehole->wrap(\&Math::Random::random_permutation,$safeeval,'&math_random_permutation');
720: $safehole->wrap(\&Math::Random::random_permuted_index,$safeeval,'&math_random_permuted_index');
721: $safehole->wrap(\&Math::Random::random_uniform,$safeeval,'&math_random_uniform');
722: $safehole->wrap(\&Math::Random::random_poisson,$safeeval,'&math_random_poisson');
723: $safehole->wrap(\&Math::Random::random_uniform_integer,$safeeval,'&math_random_uniform_integer');
724: $safehole->wrap(\&Math::Random::random_negative_binomial,$safeeval,'&math_random_negative_binomial');
725: $safehole->wrap(\&Math::Random::random_binomial,$safeeval,'&math_random_binomial');
726: $safehole->wrap(\&Math::Random::random_seed_from_phrase,$safeeval,'&random_seed_from_phrase');
727: $safehole->wrap(\&Math::Random::random_set_seed_from_phrase,$safeeval,'&random_set_seed_from_phrase');
728: $safehole->wrap(\&Math::Random::random_get_seed,$safeeval,'&random_get_seed');
729: $safehole->wrap(\&Math::Random::random_set_seed,$safeeval,'&random_set_seed');
730:
731: #need to inspect this class of ops
732: # $safeeval->deny(":base_orig");
733: $safeinit .= ';$external::target="'.$target.'";';
734: my $rndseed;
735: my ($symb,$courseid,$domain,$name) = &Apache::lonxml::whichuser();
736: $rndseed=&Apache::lonnet::rndseed($symb,$courseid,$domain,$name);
737: $safeinit .= ';$external::randomseed='.$rndseed.';';
738: &Apache::lonxml::debug("Setting rndseed to $rndseed");
739: &Apache::run::run($safeinit,$safeeval);
740: }
741:
742: sub default_homework_load {
743: my ($safeeval)=@_;
744: &Apache::lonxml::debug('Loading default_homework');
745: my $default=&Apache::lonnet::getfile('/home/httpd/html/res/adm/includes/default_homework.lcpm');
746: if ($default eq -1) {
747: &Apache::lonxml::error("<b>Unable to find <i>default_homework.lcpm</i></b>");
748: } else {
749: &Apache::run::run($default,$safeeval);
750: $Apache::lonxml::default_homework_loaded=1;
751: }
752: }
753:
754: sub startredirection {
755: $Apache::lonxml::redirection++;
756: push (@Apache::lonxml::outputstack, '');
757: }
758:
759: sub endredirection {
760: if (!$Apache::lonxml::redirection) {
761: &Apache::lonxml::error("Endredirection was called, before a startredirection, perhaps you have unbalanced tags. Some debuging information:".join ":",caller);
762: return '';
763: }
764: $Apache::lonxml::redirection--;
765: pop @Apache::lonxml::outputstack;
766: }
767:
768: sub end_tag {
769: my ($tagstack,$parstack,$token)=@_;
770: pop(@$tagstack);
771: pop(@$parstack);
772: &decreasedepth($token);
773: }
774:
775: sub initdepth {
776: @Apache::lonxml::depthcounter=();
777: $Apache::lonxml::depth=-1;
778: $Apache::lonxml::olddepth=-1;
779: }
780:
781: sub increasedepth {
782: my ($token) = @_;
783: $Apache::lonxml::depth++;
784: $Apache::lonxml::depthcounter[$Apache::lonxml::depth]++;
785: if ($Apache::lonxml::depthcounter[$Apache::lonxml::depth]==1) {
786: $Apache::lonxml::olddepth=$Apache::lonxml::depth;
787: }
788: my $curdepth=join('_',@Apache::lonxml::depthcounter);
789: &Apache::lonxml::debug("s $Apache::lonxml::depth : $Apache::lonxml::olddepth : $curdepth : $token->[1]\n");
790: #print "<br />s $Apache::lonxml::depth : $Apache::lonxml::olddepth : $curdepth : $token->[1]\n";
791: }
792:
793: sub decreasedepth {
794: my ($token) = @_;
795: $Apache::lonxml::depth--;
796: if ($Apache::lonxml::depth<$Apache::lonxml::olddepth-1) {
797: $#Apache::lonxml::depthcounter--;
798: $Apache::lonxml::olddepth=$Apache::lonxml::depth+1;
799: }
800: if ( $Apache::lonxml::depth < -1) {
801: &Apache::lonxml::warning(&mt("Missing tags, unable to properly run file."));
802: $Apache::lonxml::depth='-1';
803: }
804: my $curdepth=join('_',@Apache::lonxml::depthcounter);
805: &Apache::lonxml::debug("e $Apache::lonxml::depth : $Apache::lonxml::olddepth : $token->[1] : $curdepth\n");
806: #print "<br />e $Apache::lonxml::depth : $Apache::lonxml::olddepth : $token->[1] : $curdepth\n";
807: }
808:
809: sub get_all_text_unbalanced {
810: #there is a copy of this in lonpublisher.pm
811: my($tag,$pars)= @_;
812: my $token;
813: my $result='';
814: $tag='<'.$tag.'>';
815: while ($token = $$pars[-1]->get_token) {
816: if (($token->[0] eq 'T')||($token->[0] eq 'C')||($token->[0] eq 'D')) {
817: $result.=$token->[1];
818: } elsif ($token->[0] eq 'PI') {
819: $result.=$token->[2];
820: } elsif ($token->[0] eq 'S') {
821: $result.=$token->[4];
822: } elsif ($token->[0] eq 'E') {
823: $result.=$token->[2];
824: }
825: if ($result =~ /(.*)\Q$tag\E(.*)/s) {
826: &Apache::lonxml::debug('Got a winner with leftovers ::'.$2);
827: &Apache::lonxml::debug('Result is :'.$1);
828: $result=$1;
829: my $redo=$tag.$2;
830: &Apache::lonxml::newparser($pars,\$redo);
831: last;
832: }
833: }
834: return $result
835: }
836:
837: sub increment_counter {
838: my ($increment) = @_;
839: if (defined($increment) && $increment gt 0) {
840: $Apache::lonxml::counter+=$increment;
841: } else {
842: $Apache::lonxml::counter++;
843: }
844: $Apache::lonxml::counter_changed=1;
845: }
846:
847: sub init_counter {
848: if (defined($ENV{'form.counter'})) {
849: $Apache::lonxml::counter=$ENV{'form.counter'};
850: $Apache::lonxml::counter_changed=0;
851: } else {
852: $Apache::lonxml::counter=1;
853: $Apache::lonxml::counter_changed=1;
854: }
855: }
856:
857: sub store_counter {
858: &Apache::lonnet::appenv(('form.counter' => $Apache::lonxml::counter));
859: return '';
860: }
861:
862: sub get_all_text {
863: my($tag,$pars,$style)= @_;
864: &Apache::lonxml::debug("Got a ".ref($pars));
865: my $gotfullstack=1;
866: if (ref($pars) ne 'ARRAY') {
867: $gotfullstack=0;
868: $pars=[$pars];
869: }
870: &Apache::lonxml::debug("Got a ".ref($style));
871: if (ref($style) ne 'HASH') {
872: $style={};
873: } else {
874: &Apache::lonhomework::showhash(%$style);
875: }
876: my $depth=0;
877: my $token;
878: my $result='';
879: if ( $tag =~ m:^/: ) {
880: my $tag=substr($tag,1);
881: #&Apache::lonxml::debug("have:$tag:");
882: my $top_empty=0;
883: while (($depth >=0) && ($#$pars > -1) && (!$top_empty)) {
884: while (($depth >=0) && ($token = $$pars[-1]->get_token)) {
885: #&Apache::lonxml::debug("e token:$token->[0]:$depth:$token->[1]:".$#$pars.":".$#Apache::lonxml::pwd);
886: if (($token->[0] eq 'T')||($token->[0] eq 'C')||($token->[0] eq 'D')) {
887: $result.=$token->[1];
888: } elsif ($token->[0] eq 'PI') {
889: $result.=$token->[2];
890: } elsif ($token->[0] eq 'S') {
891: if ($token->[1] =~ /^$tag$/i) { $depth++; }
892: if ($token->[1] =~ /^LONCAPA_INTERNAL_TURN_STYLE_ON$/i) { $Apache::lonxml::usestyle=1; }
893: if ($token->[1] =~ /^LONCAPA_INTERNAL_TURN_STYLE_OFF$/i) { $Apache::lonxml::usestyle=0; }
894: $result.=$token->[4];
895: } elsif ($token->[0] eq 'E') {
896: if ( $token->[1] =~ /^$tag$/i) { $depth--; }
897: #skip sending back the last end tag
898: if ($depth == 0 && exists($$style{'/'.$token->[1]})) {
899: my $string=
900: '<LONCAPA_INTERNAL_TURN_STYLE_OFF end="yes" />'.
901: $$style{'/'.$token->[1]}.
902: $token->[2].
903: '<LONCAPA_INTERNAL_TURN_STYLE_ON />';
904: &Apache::lonxml::newparser($pars,\$string);
905: #&Apache::lonxml::debug("reParsing $string");
906: next;
907: }
908: if ($depth > -1) {
909: $result.=$token->[2];
910: } else {
911: $$pars[-1]->unget_token($token);
912: }
913: }
914: }
915: if (($depth >=0) && ($#$pars == 0) ) { $top_empty=1; }
916: if (($depth >=0) && ($#$pars > 0) ) {
917: pop(@$pars);
918: pop(@Apache::lonxml::pwd);
919: }
920: }
921: if ($top_empty && $depth >= 0) {
922: #never found the end tag ran out of text, throw error send back blank
923: &error('Never found end tag for <'.$tag.
924: '> current string <pre>'.
925: &HTML::Entities::encode($result).
926: '</pre>');
927: if ($gotfullstack) {
928: my $newstring='</'.$tag.'>'.$result;
929: &Apache::lonxml::newparser($pars,\$newstring);
930: }
931: $result='';
932: }
933: } else {
934: while ($#$pars > -1) {
935: while ($token = $$pars[-1]->get_token) {
936: #&Apache::lonxml::debug("s token:$token->[0]:$depth:$token->[1]");
937: if (($token->[0] eq 'T')||($token->[0] eq 'C')||
938: ($token->[0] eq 'D')) {
939: $result.=$token->[1];
940: } elsif ($token->[0] eq 'PI') {
941: $result.=$token->[2];
942: } elsif ($token->[0] eq 'S') {
943: if ( $token->[1] =~ /^$tag$/i) {
944: $$pars[-1]->unget_token($token); last;
945: } else {
946: $result.=$token->[4];
947: }
948: if ($token->[1] =~ /^LONCAPA_INTERNAL_TURN_STYLE_ON$/i) { $Apache::lonxml::usestyle=1; }
949: if ($token->[1] =~ /^LONCAPA_INTERNAL_TURN_STYLE_OFF$/i) { $Apache::lonxml::usestyle=0; }
950: } elsif ($token->[0] eq 'E') {
951: $result.=$token->[2];
952: }
953: }
954: if (($#$pars > 0) ) {
955: pop(@$pars);
956: pop(@Apache::lonxml::pwd);
957: } else { last; }
958: }
959: }
960: #&Apache::lonxml::debug("Exit:$result:");
961: return $result
962: }
963:
964: sub newparser {
965: my ($parser,$contentref,$dir) = @_;
966: push (@$parser,HTML::LCParser->new($contentref));
967: $$parser['-1']->xml_mode('1');
968: if ( $dir eq '' ) {
969: push (@Apache::lonxml::pwd, $Apache::lonxml::pwd[$#Apache::lonxml::pwd]);
970: } else {
971: push (@Apache::lonxml::pwd, $dir);
972: }
973: }
974:
975: sub parstring {
976: my ($token) = @_;
977: my $temp='';
978: foreach (@{$token->[3]}) {
979: unless ($_=~/\W/) {
980: my $val=$token->[2]->{$_};
981: $val =~ s/([\%\@\\\"\'])/\\$1/g;
982: #if ($val =~ m/^[\%\@]/) { $val="\\".$val; }
983: $temp .= "my \$$_=\"$val\";";
984: }
985: }
986: return $temp;
987: }
988:
989: sub writeallows {
990: unless ($#extlinks>=0) { return; }
991: my $thisurl='/res/'.&Apache::lonnet::declutter(shift);
992: if ($ENV{'httpref.'.$thisurl}) {
993: $thisurl=$ENV{'httpref.'.$thisurl};
994: }
995: my $thisdir=$thisurl;
996: $thisdir=~s/\/[^\/]+$//;
997: my %httpref=();
998: foreach (@extlinks) {
999: $httpref{'httpref.'.
1000: &Apache::lonnet::hreflocation($thisdir,$_)}=$thisurl;
1001: }
1002: @extlinks=();
1003: &Apache::lonnet::appenv(%httpref);
1004: }
1005:
1006: sub register_ssi {
1007: my ($url,%form)=@_;
1008: push (@Apache::lonxml::ssi_info,{'url'=>$url,'form'=>\%form});
1009: return '';
1010: }
1011:
1012: sub do_registered_ssi {
1013: foreach my $info (@Apache::lonxml::ssi_info) {
1014: my %form=%{ $info->{'form'}};
1015: my $url=$info->{'url'};
1016: &Apache::lonnet::ssi($url,%form);
1017: }
1018: }
1019: #
1020: # Afterburner handles anchors, highlights and links
1021: #
1022: sub afterburn {
1023: my $result=shift;
1024: &Apache::loncommon::get_unprocessed_cgi($ENV{'QUERY_STRING'},
1025: ['highlight','anchor','link']);
1026: if ($ENV{'form.highlight'}) {
1027: foreach (split(/\,/,$ENV{'form.highlight'})) {
1028: my $anchorname=$_;
1029: my $matchthis=$anchorname;
1030: $matchthis=~s/\_+/\\s\+/g;
1031: $result=~s/($matchthis)/\<font color=\"red\"\>$1\<\/font\>/gs;
1032: }
1033: }
1034: if ($ENV{'form.link'}) {
1035: foreach (split(/\,/,$ENV{'form.link'})) {
1036: my ($anchorname,$linkurl)=split(/\>/,$_);
1037: my $matchthis=$anchorname;
1038: $matchthis=~s/\_+/\\s\+/g;
1039: $result=~s/($matchthis)/\<a href=\"$linkurl\"\>$1\<\/a\>/gs;
1040: }
1041: }
1042: if ($ENV{'form.anchor'}) {
1043: my $anchorname=$ENV{'form.anchor'};
1044: my $matchthis=$anchorname;
1045: $matchthis=~s/\_+/\\s\+/g;
1046: $result=~s/($matchthis)/\<a name=\"$anchorname\"\>$1\<\/a\>/s;
1047: $result.=(<<"ENDSCRIPT");
1048: <script type="text/javascript">
1049: document.location.hash='$anchorname';
1050: </script>
1051: ENDSCRIPT
1052: }
1053: return $result;
1054: }
1055:
1056: sub storefile {
1057: my ($file,$contents)=@_;
1058: if (my $fh=Apache::File->new('>'.$file)) {
1059: print $fh $contents;
1060: $fh->close();
1061: return 1;
1062: } else {
1063: &warning("Unable to save file $file");
1064: return 0;
1065: }
1066: }
1067:
1068: sub createnewhtml {
1069: my $filecontents=(<<SIMPLECONTENT);
1070: <html>
1071: <head>
1072: <title>
1073: Title of Document Goes Here
1074: </title>
1075: </head>
1076: <body bgcolor="#FFFFFF">
1077:
1078: Body of Document Goes Here
1079:
1080: </body>
1081: </html>
1082: SIMPLECONTENT
1083: return $filecontents;
1084: }
1085:
1086: sub createnewsty {
1087: my $filecontents=(<<SIMPLECONTENT);
1088: <definetag name="">
1089: <render>
1090: <web></web>
1091: <tex></tex>
1092: </render>
1093: </definetag>
1094: SIMPLECONTENT
1095: return $filecontents;
1096: }
1097:
1098:
1099: sub inserteditinfo {
1100: my ($result,$filecontents,$filetype)=@_;
1101: $filecontents = &HTML::Entities::encode($filecontents);
1102: # my $editheader='<a href="#editsection">Edit below</a><hr />';
1103: my $xml_help = '';
1104: if ($filetype eq 'html') {
1105: $xml_help=Apache::loncommon::helpLatexCheatsheet();
1106: }
1107: my $cleanbut = '';
1108: if ($filetype eq 'html') {
1109: $cleanbut='<input type="submit" name="attemptclean" value="'.
1110: &mt('Save and then attempt to clean HTML').'" />';
1111: }
1112: my $titledisplay=&display_title();
1113: my %lt=&Apache::lonlocal::texthash('st' => 'Save this',
1114: 'vi' => 'View',
1115: 'ed' => 'Edit');
1116: my $buttons=(<<BUTTONS);
1117: $cleanbut
1118: <input type="submit" name="savethisfile" value="$lt{'st'}" />
1119: <input type="submit" name="viewmode" value="$lt{'vi'}" />
1120: BUTTONS
1121: my $editfooter=(<<ENDFOOTER);
1122: <hr />
1123: <a name="editsection" />
1124: <form method="post">
1125: $xml_help
1126: <input type="hidden" name="editmode" value="$lt{'ed'}" />
1127: $buttons<br />
1128: <textarea cols="80" rows="40" name="filecont">$filecontents</textarea>
1129: <br />$buttons
1130: <br />
1131: </form>
1132: $titledisplay
1133: ENDFOOTER
1134: # $result=~s/(\<body[^\>]*\>)/$1$editheader/is;
1135: $result=~s/(\<\/body\>)/$editfooter/is;
1136: return $result;
1137: }
1138:
1139: sub get_target {
1140: my $viewgrades=&Apache::lonnet::allowed('vgr',$ENV{'request.course.id'});
1141: if ( $ENV{'request.state'} eq 'published') {
1142: if ( defined($ENV{'form.grade_target'})
1143: && ($viewgrades == 'F' )) {
1144: return ($ENV{'form.grade_target'});
1145: } elsif (defined($ENV{'form.grade_target'})) {
1146: if (($ENV{'form.grade_target'} eq 'web') ||
1147: ($ENV{'form.grade_target'} eq 'tex') ) {
1148: return $ENV{'form.grade_target'}
1149: } else {
1150: return 'web';
1151: }
1152: } else {
1153: return 'web';
1154: }
1155: } elsif ($ENV{'request.state'} eq 'construct') {
1156: if ( defined($ENV{'form.grade_target'})) {
1157: return ($ENV{'form.grade_target'});
1158: } else {
1159: return 'web';
1160: }
1161: } else {
1162: return 'web';
1163: }
1164: }
1165:
1166: sub handler {
1167: my $request=shift;
1168:
1169: my $target=&get_target();
1170:
1171: $Apache::lonxml::debug=$ENV{'user.debug'};
1172:
1173: if ($ENV{'browser.mathml'}) {
1174: &Apache::loncommon::content_type($request,'text/xml');
1175: } else {
1176: &Apache::loncommon::content_type($request,'text/html');
1177: }
1178: &Apache::loncommon::no_cache($request);
1179: $request->send_http_header;
1180:
1181: return OK if $request->header_only;
1182:
1183:
1184: my $file=&Apache::lonnet::filelocation("",$request->uri);
1185: my $filetype;
1186: if ($file =~ /\.sty$/) {
1187: $filetype='sty';
1188: } else {
1189: $filetype='html';
1190: }
1191: #
1192: # Edit action? Save file.
1193: #
1194: unless ($ENV{'request.state'} eq 'published') {
1195: if (($ENV{'form.savethisfile'}) || ($ENV{'form.attemptclean'})) {
1196: if (&storefile($file,$ENV{'form.filecont'})) {
1197: $request->print("<font COLOR=\"#0000FF\">Updated: ". strftime("%d %b %H:%M:%S",localtime())." </font>");
1198: }
1199: }
1200: }
1201: my %mystyle;
1202: my $result = '';
1203: my $filecontents=&Apache::lonnet::getfile($file);
1204: if ($filecontents eq -1) {
1205: $result=(<<ENDNOTFOUND);
1206: <html>
1207: <head>
1208: <title>File not found</title>
1209: </head>
1210: <body bgcolor="#FFFFFF">
1211: <b>File not found: $file</b>
1212: </body>
1213: </html>
1214: ENDNOTFOUND
1215: $filecontents='';
1216: if ($ENV{'request.state'} ne 'published') {
1217: if ($filetype eq 'sty') {
1218: $filecontents=&createnewsty();
1219: } else {
1220: $filecontents=&createnewhtml();
1221: }
1222: $ENV{'form.editmode'}='Edit'; #force edit mode
1223: }
1224: } else {
1225: unless ($ENV{'request.state'} eq 'published') {
1226: if ($ENV{'form.attemptclean'}) {
1227: $filecontents=&htmlclean($filecontents,1);
1228: }
1229: #
1230: # we are in construction space, see if edit mode forced
1231: &Apache::loncommon::get_unprocessed_cgi
1232: ($ENV{'QUERY_STRING'},['editmode']);
1233: }
1234: if (!$ENV{'form.editmode'} || $ENV{'form.viewmode'}) {
1235: $result = &Apache::lonxml::xmlparse($request,$target,$filecontents,
1236: '',%mystyle);
1237: }
1238: }
1239:
1240: #
1241: # Edit action? Insert editing commands
1242: #
1243: unless ($ENV{'request.state'} eq 'published') {
1244: if ($ENV{'form.editmode'} && (!($ENV{'form.viewmode'}))) {
1245: my $displayfile=$request->uri;
1246: $displayfile=~s/^\/[^\/]*//;
1247: $result='<html><body bgcolor="#FFFFFF"><h3>'.$displayfile.
1248: '</h3></body></html>';
1249: $result=&inserteditinfo($result,$filecontents,$filetype);
1250: }
1251: }
1252: if ($filetype eq 'html') { writeallows($request->uri); }
1253:
1254:
1255:
1256: $request->print($result);
1257:
1258: return OK;
1259: }
1260:
1261: sub display_title {
1262: my $result;
1263: if ($ENV{'request.state'} eq 'construct') {
1264: my $title=&Apache::lonnet::gettitle();
1265: if (!defined($title) || $title eq '') {
1266: $title = $ENV{'request.filename'};
1267: $title = substr($title, rindex($title, '/') + 1);
1268: }
1269: $result = "<script type='text/javascript'>top.document.title = '$title - LON-CAPA Construction Space';</script>";
1270: }
1271: return $result;
1272: }
1273:
1274: sub debug {
1275: if ($Apache::lonxml::debug eq 1) {
1276: $|=1;
1277: print('<font size="-2"<pre>DEBUG:'.&HTML::Entities::encode($_[0])."</pre></font>\n");
1278: }
1279: }
1280:
1281: sub error {
1282: $errorcount++;
1283: if (($Apache::lonxml::debug eq 1) || ($ENV{'request.state'} eq 'construct') ) {
1284: # If printing in construction space, put the error inside <pre></pre>
1285: print "<b>ERROR:</b>".join("\n",@_)."\n";
1286: } else {
1287: print "<b>An Error occured while processing this resource. The instructor has been notified.</b> <br />";
1288: #notify author
1289: &Apache::lonmsg::author_res_msg($ENV{'request.filename'},join('<br />',@_));
1290: #notify course
1291: if ( $ENV{'request.course.id'} ) {
1292: my (undef,%users)=&Apache::lonfeedback::decide_receiver(undef,0,1,1,1);
1293: my $declutter=&Apache::lonnet::declutter($ENV{'request.filename'});
1294: foreach (keys %users) {
1295: my ($user,$domain) = split(/:/, $_);
1296: &Apache::lonmsg::user_normal_msg($user,$domain,
1297: "Error [$declutter]",join('<br />',@_));
1298: }
1299: }
1300:
1301: #FIXME probably shouldn't have me get everything forever.
1302: &Apache::lonmsg::user_normal_msg('albertel','msu',"Error in $ENV{'request.filename'}",join('<br />',@_));
1303: #&Apache::lonmsg::user_normal_msg('albertel','103',"Error in $ENV{'request.filename'}",$_[0]);
1304: }
1305: }
1306:
1307: sub warning {
1308: $warningcount++;
1309:
1310: if ($ENV{'form.grade_target'} ne 'tex') {
1311: if ($ENV{'request.state'} eq 'construct' || $Apache::lonxml::debug) {
1312: print "<b>W</b>ARNING<b>:</b>".join('<br />',@_)."<br />\n";
1313: }
1314: }
1315: }
1316:
1317: sub get_param {
1318: my ($param,$parstack,$safeeval,$context,$case_insensitive) = @_;
1319: if ( ! $context ) { $context = -1; }
1320: my $args ='';
1321: if ( $#$parstack > (-2-$context) ) { $args=$$parstack[$context]; }
1322: if ( ! $args ) { return undef; }
1323: if ( $case_insensitive ) {
1324: if ($args =~ s/(my \$)(\Q$param\E)(=\")/$1.lc($2).$3/ei) {
1325: return &Apache::run::run("{$args;".'return $'.$param.'}',
1326: $safeeval); #'
1327: } else {
1328: return undef;
1329: }
1330: } else {
1331: if ( $args =~ /my \$\Q$param\E=\"/ ) {
1332: return &Apache::run::run("{$args;".'return $'.$param.'}',
1333: $safeeval); #'
1334: } else {
1335: return undef;
1336: }
1337: }
1338: }
1339:
1340: sub get_param_var {
1341: my ($param,$parstack,$safeeval,$context,$case_insensitive) = @_;
1342: if ( ! $context ) { $context = -1; }
1343: my $args ='';
1344: if ( $#$parstack > (-2-$context) ) { $args=$$parstack[$context]; }
1345: &Apache::lonxml::debug("Args are $args param is $param");
1346: if ($case_insensitive) {
1347: if (! ($args=~s/(my \$)(\Q$param\E)(=\")/$1.lc($2).$3/ei)) {
1348: return undef;
1349: }
1350: } elsif ( $args !~ /my \$\Q$param\E=\"/ ) { return undef; }
1351: my $value=&Apache::run::run("{$args;".'return $'.$param.'}',$safeeval); #'
1352: &Apache::lonxml::debug("first run is $value");
1353: if ($value =~ /^[\$\@\%]\w+$/) {
1354: &Apache::lonxml::debug("doing second");
1355: my @result=&Apache::run::run("return $value",$safeeval,1);
1356: if (!defined($result[0])) {
1357: return $value
1358: } else {
1359: if (wantarray) { return @result; } else { return $result[0]; }
1360: }
1361: } else {
1362: return $value;
1363: }
1364: }
1365:
1366: sub register_insert {
1367: my @data = split /\n/, &Apache::lonnet::getfile('/home/httpd/lonTabs/insertlist.tab');
1368: my $i;
1369: my $tagnum=0;
1370: my @order;
1371: for ($i=0;$i < $#data; $i++) {
1372: my $line = $data[$i];
1373: if ( $line =~ /^\#/ || $line =~ /^\s*\n/) { next; }
1374: if ( $line =~ /TABLE/ ) { last; }
1375: my ($tag,$descrip,$color,$function,$show,$helpfile,$helpdesc) = split(/,/, $line);
1376: if ($tag) {
1377: $insertlist{"$tagnum.tag"} = $tag;
1378: $insertlist{"$tagnum.description"} = $descrip;
1379: $insertlist{"$tagnum.color"} = $color;
1380: $insertlist{"$tagnum.function"} = $function;
1381: if (!defined($show)) { $show='yes'; }
1382: $insertlist{"$tagnum.show"}= $show;
1383: $insertlist{"$tagnum.helpfile"} = $helpfile;
1384: $insertlist{"$tagnum.helpdesc"} = $helpdesc;
1385: $insertlist{"$tag.num"}=$tagnum;
1386: $tagnum++;
1387: }
1388: }
1389: $i++; #skipping TABLE line
1390: $tagnum = 0;
1391: for (;$i < $#data;$i++) {
1392: my $line = $data[$i];
1393: my ($mnemonic,@which) = split(/ +/,$line);
1394: my $tag = $insertlist{"$tagnum.tag"};
1395: for (my $j=0;$j <=$#which;$j++) {
1396: if ( $which[$j] eq 'Y' ) {
1397: if ($insertlist{"$j.show"} ne 'no') {
1398: push(@{ $insertlist{"$tag.which"} },$j);
1399: }
1400: }
1401: }
1402: $tagnum++;
1403: }
1404: }
1405:
1406: sub description {
1407: my ($token)=@_;
1408: my $tagnum;
1409: my $tag=$token->[1];
1410: foreach my $namespace (reverse @Apache::lonxml::namespace) {
1411: my $testtag=$namespace.'::'.$tag;
1412: $tagnum=$insertlist{"$testtag.num"};
1413: if (defined($tagnum)) { last; }
1414: }
1415: if (!defined ($tagnum)) { $tagnum=$Apache::lonxml::insertlist{"$tag.num"}; }
1416: return $insertlist{$tagnum.'.description'};
1417: }
1418:
1419: # Returns a list containing the help file, and the description
1420: sub helpinfo {
1421: my ($token)=@_;
1422: my $tagnum;
1423: my $tag=$token->[1];
1424: foreach my $namespace (reverse @Apache::lonxml::namespace) {
1425: my $testtag=$namespace.'::'.$tag;
1426: $tagnum=$insertlist{"$testtag.num"};
1427: if (defined($tagnum)) { last; }
1428: }
1429: if (!defined ($tagnum)) { $tagnum=$Apache::lonxml::insertlist{"$tag.num"}; }
1430: return ($insertlist{$tagnum.'.helpfile'}, $insertlist{$tagnum.'.helpdesc'});
1431: }
1432:
1433: # ----------------------------------------------------------------- whichuser
1434: # returns a list of $symb, $courseid, $domain, $name that is correct for
1435: # calls to lonnet functions for this setup.
1436: # - looks for form.grade_ parameters
1437: sub whichuser {
1438: my ($passedsymb)=@_;
1439: my ($symb,$courseid,$domain,$name,$publicuser);
1440: if (defined($ENV{'form.grade_symb'})) {
1441: my $tmp_courseid=$ENV{'form.grade_courseid'};
1442: my $allowed=&Apache::lonnet::allowed('vgr',$tmp_courseid);
1443: if ($allowed) {
1444: $symb=$ENV{'form.grade_symb'};
1445: $courseid=$ENV{'form.grade_courseid'};
1446: $domain=$ENV{'form.grade_domain'};
1447: $name=$ENV{'form.grade_username'};
1448: }
1449: } else {
1450: if (!$passedsymb) {
1451: $symb=&Apache::lonnet::symbread();
1452: } else {
1453: $symb=$passedsymb;
1454: }
1455: $courseid=$ENV{'request.course.id'};
1456: $domain=$ENV{'user.domain'};
1457: $name=$ENV{'user.name'};
1458: if ($name eq 'public' && $domain eq 'public') {
1459: if (!defined($ENV{'form.username'})) {
1460: $ENV{'form.username'}.=time.rand(10000000);
1461: }
1462: $name.=$ENV{'form.username'};
1463: }
1464: }
1465: return ($symb,$courseid,$domain,$name,$publicuser);
1466: }
1467:
1468: 1;
1469: __END__
1470:
1471:
FreeBSD-CVSweb <freebsd-cvsweb@FreeBSD.org>
![[BACK]](/icons/back.gif){kind=icon}
Return to lonxml.pm CVS log ![[TXT]](/icons/text.gif){kind=icon}
![[DIR]](/icons/dir.gif){kind=icon}
Up to [LON-CAPA] / loncom / xml