1: # The LearningOnline Network with CAPA
2: # XML Parser Module
3: #
4: # $Id: lonxml.pm,v 1.310 2004/03/12 17:26:29 sakharuk 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::languagetags();
100: use Apache::edit();
101: use Apache::inputtags();
102: use Apache::outputtags();
103: use Apache::lonnet();
104: use Apache::File();
105: use Apache::loncommon();
106: use Apache::lonfeedback();
107: use Apache::lonmsg();
108: use Apache::loncacc();
109: use Apache::lonlocal;
110:
111: #================================================== Main subroutine: xmlparse
112: #debugging control, to turn on debugging modify the correct handler
113: $Apache::lonxml::debug=0;
114:
115: # keeps count of the number of warnings and errors generated in a parse
116: $warningcount=0;
117: $errorcount=0;
118:
119: #path to the directory containing the file currently being processed
120: @pwd=();
121:
122: #these two are used for capturing a subset of the output for later processing,
123: #don't touch them directly use &startredirection and &endredirection
124: @outputstack = ();
125: $redirection = 0;
126:
127: #controls wheter the <import> tag actually does
128: $import = 1;
129: @extlinks=();
130:
131: # meta mode is a bit weird only some output is to be turned off
132: #<output> tag turns metamode off (defined in londefdef.pm)
133: $metamode = 0;
134:
135: # turns on and of run::evaluate actually derefencing var refs
136: $evaluate = 1;
137:
138: # data structure for eidt mode, determines what tags can go into what other tags
139: %insertlist=();
140:
141: # stores the list of active tag namespaces
142: @namespace=();
143:
144: # if 0 all high ASCII characters will be encoded into HTML Entities
145: $prevent_entity_encode=0;
146:
147: # has the dynamic menu been updated to know about this resource
148: $Apache::lonxml::registered=0;
149:
150: # a pointer the the Apache request object
151: $Apache::lonxml::request='';
152:
153: # a problem number counter, and check on ether it is used
154: $Apache::lonxml::counter=1;
155: $Apache::lonxml::counter_changed=0;
156:
157: #internal check on whether to look at style defs
158: $Apache::lonxml::usestyle=1;
159:
160: #locations used to store the parameter string for style substitutions
161: $Apache::lonxml::style_values='';
162: $Apache::lonxml::style_end_values='';
163:
164: #array of ssi calls that need to occur after we are done parsing
165: @Apache::lonxml::ssi_info=();
166:
167: #should we do the postag variable interpolation
168: $Apache::lonxml::post_evaluate=1;
169:
170: #a header message to emit in the case of any generated warning or errors
171: $Apache::lonxml::warnings_error_header='';
172:
173: sub xmlbegin {
174: my $output='';
175: if ($ENV{'browser.mathml'}) {
176: $output='<?xml version="1.0"?>'
177: .'<?xml-stylesheet type="text/css" href="/adm/MathML/mathml.css"?>'
178: .'<!DOCTYPE html SYSTEM "/adm/MathML/mathml.dtd" '
179: .'[<!ENTITY mathns "http://www.w3.org/1998/Math/MathML">]>'
180: .'<html xmlns:math="http://www.w3.org/1998/Math/MathML" '
181: .'xmlns="http://www.w3.org/TR/REC-html40">';
182: } else {
183: $output='<html>';
184: }
185: return $output;
186: }
187:
188: sub xmlend {
189: my $mode='xml';
190: my $status='OPEN';
191: if ($Apache::lonhomework::parsing_a_problem) {
192: $mode='problem';
193: $status=$Apache::inputtags::status[-1];
194: }
195: return &Apache::lonfeedback::list_discussion($mode,$status).'</html>';
196: }
197:
198: sub tokeninputfield {
199: my $defhost=$Apache::lonnet::perlvar{'lonHostID'};
200: $defhost=~tr/a-z/A-Z/;
201: return (<<ENDINPUTFIELD)
202: <script type="text/javascript">
203: function updatetoken() {
204: var comp=new Array;
205: var barcode=unescape(document.tokeninput.barcode.value);
206: comp=barcode.split('*');
207: if (typeof(comp[0])!="undefined") {
208: document.tokeninput.codeone.value=comp[0];
209: }
210: if (typeof(comp[1])!="undefined") {
211: document.tokeninput.codetwo.value=comp[1];
212: }
213: if (typeof(comp[2])!="undefined") {
214: comp[2]=comp[2].toUpperCase();
215: document.tokeninput.codethree.value=comp[2];
216: }
217: document.tokeninput.barcode.value='';
218: }
219: </script>
220: <form method="post" name="tokeninput">
221: <table border="2" bgcolor="#FFFFBB">
222: <tr><th>DocID Checkin</th></tr>
223: <tr><td>
224: <table>
225: <tr>
226: <td>Scan in Barcode</td>
227: <td><input type="text" size="22" name="barcode"
228: onChange="updatetoken()"/></td>
229: </tr>
230: <tr><td><i>or</i> Type in DocID</td>
231: <td>
232: <input type="text" size="5" name="codeone" />
233: <b><font size="+2">*</font></b>
234: <input type="text" size="5" name="codetwo" />
235: <b><font size="+2">*</font></b>
236: <input type="text" size="10" name="codethree" value="$defhost"
237: onChange="this.value=this.value.toUpperCase()" />
238: </td></tr>
239: </table>
240: </td></tr>
241: <tr><td><input type="submit" value="Check in DocID" /></td></tr>
242: </table>
243: </form>
244: ENDINPUTFIELD
245: }
246:
247: sub maketoken {
248: my ($symb,$tuname,$tudom,$tcrsid)=@_;
249: unless ($symb) {
250: $symb=&Apache::lonnet::symbread();
251: }
252: unless ($tuname) {
253: $tuname=$ENV{'user.name'};
254: $tudom=$ENV{'user.domain'};
255: $tcrsid=$ENV{'request.course.id'};
256: }
257:
258: return &Apache::lonnet::checkout($symb,$tuname,$tudom,$tcrsid);
259: }
260:
261: sub printtokenheader {
262: my ($target,$token,$tsymb,$tcrsid,$tudom,$tuname)=@_;
263: unless ($token) { return ''; }
264:
265: my ($symb,$courseid,$domain,$name) = &Apache::lonxml::whichuser();
266: unless ($tsymb) {
267: $tsymb=$symb;
268: }
269: unless ($tuname) {
270: $tuname=$name;
271: $tudom=$domain;
272: $tcrsid=$courseid;
273: }
274:
275: my %reply=&Apache::lonnet::get('environment',
276: ['firstname','middlename','lastname','generation'],
277: $tudom,$tuname);
278: my $plainname=$reply{'firstname'}.' '.
279: $reply{'middlename'}.' '.
280: $reply{'lastname'}.' '.
281: $reply{'generation'};
282:
283: if ($target eq 'web') {
284: my %idhash=&Apache::lonnet::idrget($tudom,($tuname));
285: return
286: '<img align="right" src="/cgi-bin/barcode.png?encode='.$token.'" />'.
287: &mt('Checked out for').' '.$plainname.
288: '<br />'.&mt('User').': '.$tuname.' at '.$tudom.
289: '<br />'.&mt('ID').': '.$idhash{$tuname}.
290: '<br />'.&mt('CourseID').': '.$tcrsid.
291: '<br />'.&mt('Course').': '.$ENV{'course.'.$tcrsid.'.description'}.
292: '<br />'.&mt('DocID').': '.$token.
293: '<br />'.&mt('Time').': '.&Apache::lonlocal::locallocaltime().'<hr />';
294: } else {
295: return $token;
296: }
297: }
298:
299: sub fontsettings() {
300: my $headerstring='';
301: if (($ENV{'browser.os'} eq 'mac') && (!$ENV{'browser.mathml'})) {
302: $headerstring.=
303: '<meta Content-Type="text/html; charset=x-mac-roman">';
304: } elsif (!$ENV{'browser.mathml'} && $ENV{'browser.unicode'}) {
305: $headerstring.=
306: '<meta http-equiv="Content-Type" content="text/html; charset=utf-8" />';
307: }
308: return $headerstring;
309: }
310:
311: sub printalltags {
312: my $temp;
313: foreach $temp (sort keys %Apache::lonxml::alltags) {
314: &Apache::lonxml::debug("$temp -- ".
315: join(',',@{ $Apache::lonxml::alltags{$temp} }));
316: }
317: }
318:
319: sub xmlparse {
320: my ($request,$target,$content_file_string,$safeinit,%style_for_target) = @_;
321:
322: &setup_globals($request,$target);
323: &Apache::inputtags::initialize_inputtags();
324: &Apache::outputtags::initialize_outputtags();
325: &Apache::edit::initialize_edit();
326: &Apache::londefdef::initialize_londefdef();
327:
328: #
329: # do we have a course style file?
330: #
331:
332: if ($ENV{'request.course.id'} && $ENV{'request.state'} ne 'construct') {
333: my $bodytext=
334: $ENV{'course.'.$ENV{'request.course.id'}.'.default_xml_style'};
335: if ($bodytext) {
336: my $location=&Apache::lonnet::filelocation('',$bodytext);
337: my $styletext=&Apache::lonnet::getfile($location);
338: if ($styletext ne '-1') {
339: %style_for_target = (%style_for_target,
340: &Apache::style::styleparser($target,$styletext));
341: }
342: }
343: } elsif ($ENV{'construct.style'} && ($ENV{'request.state'} eq 'construct')) {
344: my $location=&Apache::lonnet::filelocation('',$ENV{'construct.style'});
345: my $styletext=&Apache::lonnet::getfile($location);
346: if ($styletext ne '-1') {
347: %style_for_target = (%style_for_target,
348: &Apache::style::styleparser($target,$styletext));
349: }
350: }
351: #&printalltags();
352: my @pars = ();
353: my $pwd=$ENV{'request.filename'};
354: $pwd =~ s:/[^/]*$::;
355: &newparser(\@pars,\$content_file_string,$pwd);
356:
357: my $safeeval = new Safe;
358: my $safehole = new Safe::Hole;
359: &init_safespace($target,$safeeval,$safehole,$safeinit);
360: #-------------------- Redefinition of the target in the case of compound target
361:
362: ($target, my @tenta) = split('&&',$target);
363:
364: my @stack = ();
365: my @parstack = ();
366: &initdepth;
367:
368: my $finaloutput = &inner_xmlparse($target,\@stack,\@parstack,\@pars,
369: $safeeval,\%style_for_target);
370:
371: if ($ENV{'request.uri'}) {
372: &writeallows($ENV{'request.uri'});
373: }
374: &do_registered_ssi();
375: if ($Apache::lonxml::counter_changed) { &store_counter() }
376: return $finaloutput;
377: }
378:
379: sub htmlclean {
380: my ($raw,$full)=@_;
381:
382: my $tree = HTML::TreeBuilder->new;
383: $tree->ignore_unknown(0);
384:
385: $tree->parse($raw);
386:
387: my $output= $tree->as_HTML(undef,' ');
388:
389: $output=~s/\<(br|hr|img|meta|allow)(.*?)\>/\<$1$2 \/\>/gis;
390: $output=~s/\<\/(br|hr|img|meta|allow)\>//gis;
391: unless ($full) {
392: $output=~s/\<[\/]*(body|head|html)\>//gis;
393: }
394:
395: $tree = $tree->delete;
396:
397: return $output;
398: }
399:
400: sub latex_special_symbols {
401: my ($string,$where)=@_;
402: if ($where eq 'header') {
403: $string =~ s/(\\|_|\^)/ /g;
404: $string =~ s/(\$|%|\#|&|\{|\})/\\$1/g;
405: $string =~ s/_/ /g;
406: } else {
407: $string=~s/([^\\])\%/$1\\\%/g;
408: $string=~s/([^\\])(\$|_)/$1\\$2/g;
409: $string=~s/\$\$/\$\\\$/g;
410: $string=~s/([^\\])\&/$1\\\&/g;
411: $string=~s/([^\\])\#/$1\\\#/g;
412: $string=~s/\#\#/\#\\\#/g;
413: $string=~s/([^\\])(\~|\^)/$1\\$2\\strut /g;
414: $string=~s/(>|<)/\\ensuremath\{$1\}/g; #more or less
415: #single { or } How to escape?
416: }
417: return $string;
418: }
419:
420: sub inner_xmlparse {
421: my ($target,$stack,$parstack,$pars,$safeeval,$style_for_target)=@_;
422: my $finaloutput = '';
423: my $result;
424: my $token;
425: my $dontpop=0;
426: while ( $#$pars > -1 ) {
427: while ($token = $$pars['-1']->get_token) {
428: if (($token->[0] eq 'T') || ($token->[0] eq 'C') ) {
429: if ($metamode<1) {
430: my $text=$token->[1];
431: if ($token->[0] eq 'C' && $target eq 'tex') {
432: $text = '';
433: # $text = '%'.$text."\n";
434: }
435: $result.=$text;
436: }
437: } elsif (($token->[0] eq 'D')) {
438: if ($metamode<1 && $target eq 'web') {
439: my $text=$token->[1];
440: $result.=$text;
441: }
442: } elsif ($token->[0] eq 'PI') {
443: if ($metamode<1 && $target eq 'web') {
444: $result=$token->[2];
445: }
446: } elsif ($token->[0] eq 'S') {
447: # add tag to stack
448: push (@$stack,$token->[1]);
449: # add parameters list to another stack
450: push (@$parstack,&parstring($token));
451: &increasedepth($token);
452: if ($Apache::lonxml::usestyle &&
453: exists($$style_for_target{$token->[1]})) {
454: $Apache::lonxml::usestyle=0;
455: my $string=$$style_for_target{$token->[1]}.
456: '<LONCAPA_INTERNAL_TURN_STYLE_ON />';
457: &Apache::lonxml::newparser($pars,\$string);
458: $Apache::lonxml::style_values=$$parstack[-1];
459: $Apache::lonxml::style_end_values=$$parstack[-1];
460: } else {
461: $result = &callsub("start_$token->[1]", $target, $token, $stack,
462: $parstack, $pars, $safeeval, $style_for_target);
463: }
464: } elsif ($token->[0] eq 'E') {
465: if ($Apache::lonxml::usestyle &&
466: exists($$style_for_target{'/'."$token->[1]"})) {
467: $Apache::lonxml::usestyle=0;
468: my $string=$$style_for_target{'/'.$token->[1]}.
469: '<LONCAPA_INTERNAL_TURN_STYLE_ON end="'.$token->[1].'" />';
470: &Apache::lonxml::newparser($pars,\$string);
471: $Apache::lonxml::style_values=$Apache::lonxml::style_end_values;
472: $Apache::lonxml::style_end_values='';
473: $dontpop=1;
474: } else {
475: #clear out any tags that didn't end
476: while ($token->[1] ne $$stack['-1'] && ($#$stack > -1)) {
477: my $lasttag=$$stack[-1];
478: if ($token->[1] =~ /^$lasttag$/i) {
479: &Apache::lonxml::warning('Using tag </'.$token->[1].'> on line '.$token->[3].' as end tag to <'.$$stack[-1].'>');
480: last;
481: } else {
482: &Apache::lonxml::warning('Found tag </'.$token->[1].'> on line '.$token->[3].' when looking for </'.$$stack[-1].'> in file');
483: &end_tag($stack,$parstack,$token);
484: }
485: }
486: $result = &callsub("end_$token->[1]", $target, $token, $stack,
487: $parstack, $pars,$safeeval, $style_for_target);
488: }
489: } else {
490: &Apache::lonxml::error("Unknown token event :$token->[0]:$token->[1]:");
491: }
492: #evaluate variable refs in result
493: if ($Apache::lonxml::post_evaluate &&$result ne "") {
494: my $extras;
495: if (!$Apache::lonxml::usestyle) {
496: $extras=$Apache::lonxml::style_values;
497: }
498: if ( $#$parstack > -1 ) {
499: $result=&Apache::run::evaluate($result,$safeeval,$extras.$$parstack[-1]);
500: } else {
501: $result= &Apache::run::evaluate($result,$safeeval,$extras);
502: }
503: }
504: $Apache::lonxml::post_evaluate=1;
505:
506: if (($token->[0] eq 'T') || ($token->[0] eq 'C') || ($token->[0] eq 'D') ) {
507: #Style file definitions should be correct
508: if ($target eq 'tex' && ($Apache::lonxml::usestyle)) {
509: $result=&latex_special_symbols(&Apache::lonprintout::character_chart($result));
510: }
511: }
512:
513: # Encode any high ASCII characters
514: # if (!$Apache::lonxml::prevent_entity_encode) {
515: # $result=&HTML::Entities::encode($result,"\200-\377");
516: # }
517: if ($Apache::lonxml::redirection) {
518: $Apache::lonxml::outputstack['-1'] .= $result;
519: } else {
520: $finaloutput.=$result;
521: }
522: $result = '';
523:
524: if ($token->[0] eq 'E' && !$dontpop) {
525: &end_tag($stack,$parstack,$token);
526: }
527: $dontpop=0;
528: }
529: if ($#$pars > -1) {
530: pop @$pars;
531: pop @Apache::lonxml::pwd;
532: }
533: }
534:
535: # if ($target eq 'meta') {
536: # $finaloutput.=&endredirection;
537: # }
538:
539:
540: if (($ENV{'QUERY_STRING'}) && ($target eq 'web')) {
541: $finaloutput=&afterburn($finaloutput);
542: }
543: return $finaloutput;
544: }
545:
546: sub callsub {
547: my ($sub,$target,$token,$tagstack,$parstack,$parser,$safeeval,$style)=@_;
548: my $currentstring='';
549: my $nodefault;
550: {
551: my $sub1;
552: no strict 'refs';
553: my $tag=$token->[1];
554: # get utterly rid of extended html tags
555: if ($tag=~/^x\-/i) { return ''; }
556: my $space=$Apache::lonxml::alltags{$tag}[-1];
557: if (!$space) {
558: $tag=~tr/A-Z/a-z/;
559: $sub=~tr/A-Z/a-z/;
560: $space=$Apache::lonxml::alltags{$tag}[-1]
561: }
562:
563: my $deleted=0;
564: $Apache::lonxml::curdepth=join('_',@Apache::lonxml::depthcounter);
565: if (($token->[0] eq 'S') && ($target eq 'modified')) {
566: $deleted=&Apache::edit::handle_delete($space,$target,$token,$tagstack,
567: $parstack,$parser,$safeeval,
568: $style);
569: }
570: if (!$deleted) {
571: if ($space) {
572: #&Apache::lonxml::debug("Calling sub $sub in $space $metamode");
573: $sub1="$space\:\:$sub";
574: ($currentstring,$nodefault) = &$sub1($target,$token,$tagstack,
575: $parstack,$parser,$safeeval,
576: $style);
577: } else {
578: #&Apache::lonxml::debug("NOT Calling sub $sub in $space $metamode");
579: if ($metamode <1) {
580: if (defined($token->[4]) && ($metamode < 1)) {
581: $currentstring = $token->[4];
582: } else {
583: $currentstring = $token->[2];
584: }
585: }
586: }
587: # &Apache::lonxml::debug("nodefalt:$nodefault:");
588: if ($currentstring eq '' && $nodefault eq '') {
589: if ($target eq 'edit') {
590: #&Apache::lonxml::debug("doing default edit for $token->[1]");
591: if ($token->[0] eq 'S') {
592: $currentstring = &Apache::edit::tag_start($target,$token);
593: } elsif ($token->[0] eq 'E') {
594: $currentstring = &Apache::edit::tag_end($target,$token);
595: }
596: } elsif ($target eq 'modified') {
597: if ($token->[0] eq 'S') {
598: $currentstring = $token->[4];
599: $currentstring.=&Apache::edit::handle_insert();
600: } elsif ($token->[0] eq 'E') {
601: $currentstring = $token->[2];
602: $currentstring.=&Apache::edit::handle_insertafter($token->[1]);
603: } else {
604: $currentstring = $token->[2];
605: }
606: }
607: }
608: }
609: use strict 'refs';
610: }
611: return $currentstring;
612: }
613:
614: sub setup_globals {
615: my ($request,$target)=@_;
616: $Apache::lonxml::request=$request;
617: $Apache::lonxml::registered = 0;
618: $errorcount=0;
619: $warningcount=0;
620: $Apache::lonxml::default_homework_loaded=0;
621: $Apache::lonxml::usestyle=1;
622: &init_counter();
623: @Apache::lonxml::pwd=();
624: @Apache::lonxml::extlinks=();
625: @Apache::lonxml::ssi_info=();
626: $Apache::lonxml::post_evaluate=1;
627: $Apache::lonxml::warnings_error_header='';
628: if ($target eq 'meta') {
629: $Apache::lonxml::redirection = 0;
630: $Apache::lonxml::metamode = 1;
631: $Apache::lonxml::evaluate = 1;
632: $Apache::lonxml::import = 0;
633: } elsif ($target eq 'answer') {
634: $Apache::lonxml::redirection = 0;
635: $Apache::lonxml::metamode = 1;
636: $Apache::lonxml::evaluate = 1;
637: $Apache::lonxml::import = 1;
638: } elsif ($target eq 'grade') {
639: &startredirection;
640: $Apache::lonxml::metamode = 0;
641: $Apache::lonxml::evaluate = 1;
642: $Apache::lonxml::import = 1;
643: } elsif ($target eq 'modified') {
644: $Apache::lonxml::redirection = 0;
645: $Apache::lonxml::metamode = 0;
646: $Apache::lonxml::evaluate = 0;
647: $Apache::lonxml::import = 0;
648: } elsif ($target eq 'edit') {
649: $Apache::lonxml::redirection = 0;
650: $Apache::lonxml::metamode = 0;
651: $Apache::lonxml::evaluate = 0;
652: $Apache::lonxml::import = 0;
653: } elsif ($target eq 'analyze') {
654: $Apache::lonxml::redirection = 0;
655: $Apache::lonxml::metamode = 0;
656: $Apache::lonxml::evaluate = 1;
657: $Apache::lonxml::import = 1;
658: } else {
659: $Apache::lonxml::redirection = 0;
660: $Apache::lonxml::metamode = 0;
661: $Apache::lonxml::evaluate = 1;
662: $Apache::lonxml::import = 1;
663: }
664: }
665:
666: sub init_safespace {
667: my ($target,$safeeval,$safehole,$safeinit) = @_;
668: $safeeval->permit("entereval");
669: $safeeval->permit(":base_math");
670: $safeeval->permit("sort");
671: $safeeval->permit("time");
672: $safeeval->deny(":base_io");
673: $safehole->wrap(\&Apache::scripttag::xmlparse,$safeeval,'&xmlparse');
674: $safehole->wrap(\&Apache::outputtags::multipart,$safeeval,'&multipart');
675: $safehole->wrap(\&Apache::lonnet::EXT,$safeeval,'&EXT');
676:
677: $safehole->wrap(\&Math::Cephes::asin,$safeeval,'&asin');
678: $safehole->wrap(\&Math::Cephes::acos,$safeeval,'&acos');
679: $safehole->wrap(\&Math::Cephes::atan,$safeeval,'&atan');
680: $safehole->wrap(\&Math::Cephes::sinh,$safeeval,'&sinh');
681: $safehole->wrap(\&Math::Cephes::cosh,$safeeval,'&cosh');
682: $safehole->wrap(\&Math::Cephes::tanh,$safeeval,'&tanh');
683: $safehole->wrap(\&Math::Cephes::asinh,$safeeval,'&asinh');
684: $safehole->wrap(\&Math::Cephes::acosh,$safeeval,'&acosh');
685: $safehole->wrap(\&Math::Cephes::atanh,$safeeval,'&atanh');
686: $safehole->wrap(\&Math::Cephes::erf,$safeeval,'&erf');
687: $safehole->wrap(\&Math::Cephes::erfc,$safeeval,'&erfc');
688: $safehole->wrap(\&Math::Cephes::j0,$safeeval,'&j0');
689: $safehole->wrap(\&Math::Cephes::j1,$safeeval,'&j1');
690: $safehole->wrap(\&Math::Cephes::jn,$safeeval,'&jn');
691: $safehole->wrap(\&Math::Cephes::jv,$safeeval,'&jv');
692: $safehole->wrap(\&Math::Cephes::y0,$safeeval,'&y0');
693: $safehole->wrap(\&Math::Cephes::y1,$safeeval,'&y1');
694: $safehole->wrap(\&Math::Cephes::yn,$safeeval,'&yn');
695: $safehole->wrap(\&Math::Cephes::yv,$safeeval,'&yv');
696:
697: $safehole->wrap(\&Math::Cephes::bdtr ,$safeeval,'&bdtr' );
698: $safehole->wrap(\&Math::Cephes::bdtrc ,$safeeval,'&bdtrc' );
699: $safehole->wrap(\&Math::Cephes::bdtri ,$safeeval,'&bdtri' );
700: $safehole->wrap(\&Math::Cephes::btdtr ,$safeeval,'&btdtr' );
701: $safehole->wrap(\&Math::Cephes::chdtr ,$safeeval,'&chdtr' );
702: $safehole->wrap(\&Math::Cephes::chdtrc,$safeeval,'&chdtrc');
703: $safehole->wrap(\&Math::Cephes::chdtri,$safeeval,'&chdtri');
704: $safehole->wrap(\&Math::Cephes::fdtr ,$safeeval,'&fdtr' );
705: $safehole->wrap(\&Math::Cephes::fdtrc ,$safeeval,'&fdtrc' );
706: $safehole->wrap(\&Math::Cephes::fdtri ,$safeeval,'&fdtri' );
707: $safehole->wrap(\&Math::Cephes::gdtr ,$safeeval,'&gdtr' );
708: $safehole->wrap(\&Math::Cephes::gdtrc ,$safeeval,'&gdtrc' );
709: $safehole->wrap(\&Math::Cephes::nbdtr ,$safeeval,'&nbdtr' );
710: $safehole->wrap(\&Math::Cephes::nbdtrc,$safeeval,'&nbdtrc');
711: $safehole->wrap(\&Math::Cephes::nbdtri,$safeeval,'&nbdtri');
712: $safehole->wrap(\&Math::Cephes::ndtr ,$safeeval,'&ndtr' );
713: $safehole->wrap(\&Math::Cephes::ndtri ,$safeeval,'&ndtri' );
714: $safehole->wrap(\&Math::Cephes::pdtr ,$safeeval,'&pdtr' );
715: $safehole->wrap(\&Math::Cephes::pdtrc ,$safeeval,'&pdtrc' );
716: $safehole->wrap(\&Math::Cephes::pdtri ,$safeeval,'&pdtri' );
717: $safehole->wrap(\&Math::Cephes::stdtr ,$safeeval,'&stdtr' );
718: $safehole->wrap(\&Math::Cephes::stdtri,$safeeval,'&stdtri');
719:
720: # $safehole->wrap(\&Math::Cephes::new_fract,$safeeval,'&new_fract');
721: # $safehole->wrap(\&Math::Cephes::radd,$safeeval,'&radd');
722: # $safehole->wrap(\&Math::Cephes::rsub,$safeeval,'&rsub');
723: # $safehole->wrap(\&Math::Cephes::rmul,$safeeval,'&rmul');
724: # $safehole->wrap(\&Math::Cephes::rdiv,$safeeval,'&rdiv');
725: # $safehole->wrap(\&Math::Cephes::euclid,$safeeval,'&euclid');
726:
727: $safehole->wrap(\&Math::Random::random_beta,$safeeval,'&math_random_beta');
728: $safehole->wrap(\&Math::Random::random_chi_square,$safeeval,'&math_random_chi_square');
729: $safehole->wrap(\&Math::Random::random_exponential,$safeeval,'&math_random_exponential');
730: $safehole->wrap(\&Math::Random::random_f,$safeeval,'&math_random_f');
731: $safehole->wrap(\&Math::Random::random_gamma,$safeeval,'&math_random_gamma');
732: $safehole->wrap(\&Math::Random::random_multivariate_normal,$safeeval,'&math_random_multivariate_normal');
733: $safehole->wrap(\&Math::Random::random_multinomial,$safeeval,'&math_random_multinomial');
734: $safehole->wrap(\&Math::Random::random_noncentral_chi_square,$safeeval,'&math_random_noncentral_chi_square');
735: $safehole->wrap(\&Math::Random::random_noncentral_f,$safeeval,'&math_random_noncentral_f');
736: $safehole->wrap(\&Math::Random::random_normal,$safeeval,'&math_random_normal');
737: $safehole->wrap(\&Math::Random::random_permutation,$safeeval,'&math_random_permutation');
738: $safehole->wrap(\&Math::Random::random_permuted_index,$safeeval,'&math_random_permuted_index');
739: $safehole->wrap(\&Math::Random::random_uniform,$safeeval,'&math_random_uniform');
740: $safehole->wrap(\&Math::Random::random_poisson,$safeeval,'&math_random_poisson');
741: $safehole->wrap(\&Math::Random::random_uniform_integer,$safeeval,'&math_random_uniform_integer');
742: $safehole->wrap(\&Math::Random::random_negative_binomial,$safeeval,'&math_random_negative_binomial');
743: $safehole->wrap(\&Math::Random::random_binomial,$safeeval,'&math_random_binomial');
744: $safehole->wrap(\&Math::Random::random_seed_from_phrase,$safeeval,'&random_seed_from_phrase');
745: $safehole->wrap(\&Math::Random::random_set_seed_from_phrase,$safeeval,'&random_set_seed_from_phrase');
746: $safehole->wrap(\&Math::Random::random_get_seed,$safeeval,'&random_get_seed');
747: $safehole->wrap(\&Math::Random::random_set_seed,$safeeval,'&random_set_seed');
748: $safehole->wrap(\&Apache::lonxml::error,$safeeval,'&LONCAPA_INTERNAL_ERROR');
749:
750: #need to inspect this class of ops
751: # $safeeval->deny(":base_orig");
752: $safeinit .= ';$external::target="'.$target.'";';
753: my $rndseed;
754: my ($symb,$courseid,$domain,$name) = &Apache::lonxml::whichuser();
755: $rndseed=&Apache::lonnet::rndseed($symb,$courseid,$domain,$name);
756: $safeinit .= ';$external::randomseed='.$rndseed.';';
757: &Apache::lonxml::debug("Setting rndseed to $rndseed");
758: &Apache::run::run($safeinit,$safeeval);
759:
760: my $subroutine=<<'EVALUATESUB';
761: sub __LC_INTERNAL_EVALUATE__ {
762: my ($__LC__a,$__LC__b,$__LC__c)=@_;
763: my $__LC__prefix;
764: while(1){
765: {
766: use strict;
767: no strict "vars";
768: if (eval(defined(eval($__LC__a.$__LC__b)))) {
769: return $__LC__prefix.eval($__LC__a.$__LC__b.$__LC__c);
770: }
771: }
772: $__LC__prefix.=substr($__LC__a,0,1,"");
773: if ($__LC__a!~/^(\$|&|\#)/) { last; }
774: }
775: return $__LC__prefix.$__LC__a.$__LC__b.$__LC__c;
776: }
777: EVALUATESUB
778: $safeeval->permit("require");
779: $safeeval->reval($subroutine);
780: $safeeval->deny("require");
781: }
782:
783: sub default_homework_load {
784: my ($safeeval)=@_;
785: &Apache::lonxml::debug('Loading default_homework');
786: my $default=&Apache::lonnet::getfile('/home/httpd/html/res/adm/includes/default_homework.lcpm');
787: if ($default eq -1) {
788: &Apache::lonxml::error("<b>Unable to find <i>default_homework.lcpm</i></b>");
789: } else {
790: &Apache::run::run($default,$safeeval);
791: $Apache::lonxml::default_homework_loaded=1;
792: }
793: }
794:
795: sub startredirection {
796: $Apache::lonxml::redirection++;
797: push (@Apache::lonxml::outputstack, '');
798: }
799:
800: sub endredirection {
801: if (!$Apache::lonxml::redirection) {
802: &Apache::lonxml::error("Endredirection was called, before a startredirection, perhaps you have unbalanced tags. Some debuging information:".join ":",caller);
803: return '';
804: }
805: $Apache::lonxml::redirection--;
806: pop @Apache::lonxml::outputstack;
807: }
808:
809: sub end_tag {
810: my ($tagstack,$parstack,$token)=@_;
811: pop(@$tagstack);
812: pop(@$parstack);
813: &decreasedepth($token);
814: }
815:
816: sub initdepth {
817: @Apache::lonxml::depthcounter=();
818: $Apache::lonxml::depth=-1;
819: $Apache::lonxml::olddepth=-1;
820: }
821:
822: sub increasedepth {
823: my ($token) = @_;
824: $Apache::lonxml::depth++;
825: $Apache::lonxml::depthcounter[$Apache::lonxml::depth]++;
826: if ($Apache::lonxml::depthcounter[$Apache::lonxml::depth]==1) {
827: $Apache::lonxml::olddepth=$Apache::lonxml::depth;
828: }
829: my $curdepth=join('_',@Apache::lonxml::depthcounter);
830: &Apache::lonxml::debug("s $Apache::lonxml::depth : $Apache::lonxml::olddepth : $curdepth : $token->[1]\n");
831: #print "<br />s $Apache::lonxml::depth : $Apache::lonxml::olddepth : $curdepth : $token->[1]\n";
832: }
833:
834: sub decreasedepth {
835: my ($token) = @_;
836: $Apache::lonxml::depth--;
837: if ($Apache::lonxml::depth<$Apache::lonxml::olddepth-1) {
838: $#Apache::lonxml::depthcounter--;
839: $Apache::lonxml::olddepth=$Apache::lonxml::depth+1;
840: }
841: if ( $Apache::lonxml::depth < -1) {
842: &Apache::lonxml::warning(&mt("Missing tags, unable to properly run file."));
843: $Apache::lonxml::depth='-1';
844: }
845: my $curdepth=join('_',@Apache::lonxml::depthcounter);
846: &Apache::lonxml::debug("e $Apache::lonxml::depth : $Apache::lonxml::olddepth : $token->[1] : $curdepth\n");
847: #print "<br />e $Apache::lonxml::depth : $Apache::lonxml::olddepth : $token->[1] : $curdepth\n";
848: }
849:
850: sub get_all_text_unbalanced {
851: #there is a copy of this in lonpublisher.pm
852: my($tag,$pars)= @_;
853: my $token;
854: my $result='';
855: $tag='<'.$tag.'>';
856: while ($token = $$pars[-1]->get_token) {
857: if (($token->[0] eq 'T')||($token->[0] eq 'C')||($token->[0] eq 'D')) {
858: $result.=$token->[1];
859: } elsif ($token->[0] eq 'PI') {
860: $result.=$token->[2];
861: } elsif ($token->[0] eq 'S') {
862: $result.=$token->[4];
863: } elsif ($token->[0] eq 'E') {
864: $result.=$token->[2];
865: }
866: if ($result =~ /(.*)\Q$tag\E(.*)/s) {
867: &Apache::lonxml::debug('Got a winner with leftovers ::'.$2);
868: &Apache::lonxml::debug('Result is :'.$1);
869: $result=$1;
870: my $redo=$tag.$2;
871: &Apache::lonxml::newparser($pars,\$redo);
872: last;
873: }
874: }
875: return $result
876: }
877:
878: sub increment_counter {
879: my ($increment) = @_;
880: if (defined($increment) && $increment gt 0) {
881: $Apache::lonxml::counter+=$increment;
882: } else {
883: $Apache::lonxml::counter++;
884: }
885: $Apache::lonxml::counter_changed=1;
886: }
887:
888: sub init_counter {
889: if (defined($ENV{'form.counter'})) {
890: $Apache::lonxml::counter=$ENV{'form.counter'};
891: $Apache::lonxml::counter_changed=0;
892: } else {
893: $Apache::lonxml::counter=1;
894: $Apache::lonxml::counter_changed=1;
895: }
896: }
897:
898: sub store_counter {
899: &Apache::lonnet::appenv(('form.counter' => $Apache::lonxml::counter));
900: return '';
901: }
902:
903: sub get_all_text {
904: my($tag,$pars,$style)= @_;
905: my $gotfullstack=1;
906: if (ref($pars) ne 'ARRAY') {
907: $gotfullstack=0;
908: $pars=[$pars];
909: }
910: if (ref($style) ne 'HASH') {
911: $style={};
912: }
913: my $depth=0;
914: my $token;
915: my $result='';
916: if ( $tag =~ m:^/: ) {
917: my $tag=substr($tag,1);
918: #&Apache::lonxml::debug("have:$tag:");
919: my $top_empty=0;
920: while (($depth >=0) && ($#$pars > -1) && (!$top_empty)) {
921: while (($depth >=0) && ($token = $$pars[-1]->get_token)) {
922: #&Apache::lonxml::debug("e token:$token->[0]:$depth:$token->[1]:".$#$pars.":".$#Apache::lonxml::pwd);
923: if (($token->[0] eq 'T')||($token->[0] eq 'C')||($token->[0] eq 'D')) {
924: $result.=$token->[1];
925: } elsif ($token->[0] eq 'PI') {
926: $result.=$token->[2];
927: } elsif ($token->[0] eq 'S') {
928: if ($token->[1] =~ /^$tag$/i) { $depth++; }
929: if ($token->[1] =~ /^LONCAPA_INTERNAL_TURN_STYLE_ON$/i) { $Apache::lonxml::usestyle=1; }
930: if ($token->[1] =~ /^LONCAPA_INTERNAL_TURN_STYLE_OFF$/i) { $Apache::lonxml::usestyle=0; }
931: $result.=$token->[4];
932: } elsif ($token->[0] eq 'E') {
933: if ( $token->[1] =~ /^$tag$/i) { $depth--; }
934: #skip sending back the last end tag
935: if ($depth == 0 && exists($$style{'/'.$token->[1]}) && $Apache::lonxml::usestyle) {
936: my $string=
937: '<LONCAPA_INTERNAL_TURN_STYLE_OFF end="yes" />'.
938: $$style{'/'.$token->[1]}.
939: $token->[2].
940: '<LONCAPA_INTERNAL_TURN_STYLE_ON />';
941: &Apache::lonxml::newparser($pars,\$string);
942: #&Apache::lonxml::debug("reParsing $string");
943: next;
944: }
945: if ($depth > -1) {
946: $result.=$token->[2];
947: } else {
948: $$pars[-1]->unget_token($token);
949: }
950: }
951: }
952: if (($depth >=0) && ($#$pars == 0) ) { $top_empty=1; }
953: if (($depth >=0) && ($#$pars > 0) ) {
954: pop(@$pars);
955: pop(@Apache::lonxml::pwd);
956: }
957: }
958: if ($top_empty && $depth >= 0) {
959: #never found the end tag ran out of text, throw error send back blank
960: &error('Never found end tag for <'.$tag.
961: '> current string <pre>'.
962: &HTML::Entities::encode($result).
963: '</pre>');
964: if ($gotfullstack) {
965: my $newstring='</'.$tag.'>'.$result;
966: &Apache::lonxml::newparser($pars,\$newstring);
967: }
968: $result='';
969: }
970: } else {
971: while ($#$pars > -1) {
972: while ($token = $$pars[-1]->get_token) {
973: #&Apache::lonxml::debug("s token:$token->[0]:$depth:$token->[1]");
974: if (($token->[0] eq 'T')||($token->[0] eq 'C')||
975: ($token->[0] eq 'D')) {
976: $result.=$token->[1];
977: } elsif ($token->[0] eq 'PI') {
978: $result.=$token->[2];
979: } elsif ($token->[0] eq 'S') {
980: if ( $token->[1] =~ /^$tag$/i) {
981: $$pars[-1]->unget_token($token); last;
982: } else {
983: $result.=$token->[4];
984: }
985: if ($token->[1] =~ /^LONCAPA_INTERNAL_TURN_STYLE_ON$/i) { $Apache::lonxml::usestyle=1; }
986: if ($token->[1] =~ /^LONCAPA_INTERNAL_TURN_STYLE_OFF$/i) { $Apache::lonxml::usestyle=0; }
987: } elsif ($token->[0] eq 'E') {
988: $result.=$token->[2];
989: }
990: }
991: if (($#$pars > 0) ) {
992: pop(@$pars);
993: pop(@Apache::lonxml::pwd);
994: } else { last; }
995: }
996: }
997: #&Apache::lonxml::debug("Exit:$result:");
998: return $result
999: }
1000:
1001: sub newparser {
1002: my ($parser,$contentref,$dir) = @_;
1003: push (@$parser,HTML::LCParser->new($contentref));
1004: $$parser['-1']->xml_mode('1');
1005: if ( $dir eq '' ) {
1006: push (@Apache::lonxml::pwd, $Apache::lonxml::pwd[$#Apache::lonxml::pwd]);
1007: } else {
1008: push (@Apache::lonxml::pwd, $dir);
1009: }
1010: }
1011:
1012: sub parstring {
1013: my ($token) = @_;
1014: my $temp='';
1015: foreach (@{$token->[3]}) {
1016: unless ($_=~/\W/) {
1017: my $val=$token->[2]->{$_};
1018: $val =~ s/([\%\@\\\"\'])/\\$1/g;
1019: #if ($val =~ m/^[\%\@]/) { $val="\\".$val; }
1020: $temp .= "my \$$_=\"$val\";";
1021: }
1022: }
1023: return $temp;
1024: }
1025:
1026: sub writeallows {
1027: unless ($#extlinks>=0) { return; }
1028: my $thisurl='/res/'.&Apache::lonnet::declutter(shift);
1029: if ($ENV{'httpref.'.$thisurl}) {
1030: $thisurl=$ENV{'httpref.'.$thisurl};
1031: }
1032: my $thisdir=$thisurl;
1033: $thisdir=~s/\/[^\/]+$//;
1034: my %httpref=();
1035: foreach (@extlinks) {
1036: $httpref{'httpref.'.
1037: &Apache::lonnet::hreflocation($thisdir,$_)}=$thisurl;
1038: }
1039: @extlinks=();
1040: &Apache::lonnet::appenv(%httpref);
1041: }
1042:
1043: sub register_ssi {
1044: my ($url,%form)=@_;
1045: push (@Apache::lonxml::ssi_info,{'url'=>$url,'form'=>\%form});
1046: return '';
1047: }
1048:
1049: sub do_registered_ssi {
1050: foreach my $info (@Apache::lonxml::ssi_info) {
1051: my %form=%{ $info->{'form'}};
1052: my $url=$info->{'url'};
1053: &Apache::lonnet::ssi($url,%form);
1054: }
1055: }
1056: #
1057: # Afterburner handles anchors, highlights and links
1058: #
1059: sub afterburn {
1060: my $result=shift;
1061: &Apache::loncommon::get_unprocessed_cgi($ENV{'QUERY_STRING'},
1062: ['highlight','anchor','link']);
1063: if ($ENV{'form.highlight'}) {
1064: foreach (split(/\,/,$ENV{'form.highlight'})) {
1065: my $anchorname=$_;
1066: my $matchthis=$anchorname;
1067: $matchthis=~s/\_+/\\s\+/g;
1068: $result=~s/($matchthis)/\<font color=\"red\"\>$1\<\/font\>/gs;
1069: }
1070: }
1071: if ($ENV{'form.link'}) {
1072: foreach (split(/\,/,$ENV{'form.link'})) {
1073: my ($anchorname,$linkurl)=split(/\>/,$_);
1074: my $matchthis=$anchorname;
1075: $matchthis=~s/\_+/\\s\+/g;
1076: $result=~s/($matchthis)/\<a href=\"$linkurl\"\>$1\<\/a\>/gs;
1077: }
1078: }
1079: if ($ENV{'form.anchor'}) {
1080: my $anchorname=$ENV{'form.anchor'};
1081: my $matchthis=$anchorname;
1082: $matchthis=~s/\_+/\\s\+/g;
1083: $result=~s/($matchthis)/\<a name=\"$anchorname\"\>$1\<\/a\>/s;
1084: $result.=(<<"ENDSCRIPT");
1085: <script type="text/javascript">
1086: document.location.hash='$anchorname';
1087: </script>
1088: ENDSCRIPT
1089: }
1090: return $result;
1091: }
1092:
1093: sub storefile {
1094: my ($file,$contents)=@_;
1095: &Apache::lonnet::correct_line_ends(\$contents);
1096: if (my $fh=Apache::File->new('>'.$file)) {
1097: print $fh $contents;
1098: $fh->close();
1099: return 1;
1100: } else {
1101: &warning("Unable to save file $file");
1102: return 0;
1103: }
1104: }
1105:
1106: sub createnewhtml {
1107: my $filecontents=(<<SIMPLECONTENT);
1108: <html>
1109: <head>
1110: <title>
1111: Title of Document Goes Here
1112: </title>
1113: </head>
1114: <body bgcolor="#FFFFFF">
1115:
1116: Body of Document Goes Here
1117:
1118: </body>
1119: </html>
1120: SIMPLECONTENT
1121: return $filecontents;
1122: }
1123:
1124: sub createnewsty {
1125: my $filecontents=(<<SIMPLECONTENT);
1126: <definetag name="">
1127: <render>
1128: <web></web>
1129: <tex></tex>
1130: </render>
1131: </definetag>
1132: SIMPLECONTENT
1133: return $filecontents;
1134: }
1135:
1136:
1137: sub inserteditinfo {
1138: my ($result,$filecontents,$filetype)=@_;
1139: $filecontents = &HTML::Entities::encode($filecontents);
1140: # my $editheader='<a href="#editsection">Edit below</a><hr />';
1141: my $xml_help = '';
1142: if ($filetype eq 'html') {
1143: $xml_help=Apache::loncommon::helpLatexCheatsheet();
1144: }
1145: my $cleanbut = '';
1146: if ($filetype eq 'html') {
1147: $cleanbut='<input type="submit" name="attemptclean" value="'.
1148: &mt('Save and then attempt to clean HTML').'" />';
1149: }
1150: my $titledisplay=&display_title();
1151: my %lt=&Apache::lonlocal::texthash('st' => 'Save this',
1152: 'vi' => 'View',
1153: 'ed' => 'Edit');
1154: my $buttons=(<<BUTTONS);
1155: $cleanbut
1156: <input type="submit" name="savethisfile" accesskey="s" value="$lt{'st'}" />
1157: <input type="submit" name="viewmode" accesskey="v" value="$lt{'vi'}" />
1158: BUTTONS
1159: my $editfooter=(<<ENDFOOTER);
1160: <hr />
1161: <a name="editsection" />
1162: <form method="post">
1163: $xml_help
1164: <input type="hidden" name="editmode" value="$lt{'ed'}" />
1165: $buttons<br />
1166: <textarea cols="80" rows="40" name="filecont">$filecontents</textarea>
1167: <br />$buttons
1168: <br />
1169: </form>
1170: $titledisplay
1171: ENDFOOTER
1172: # $result=~s/(\<body[^\>]*\>)/$1$editheader/is;
1173: $result=~s/(\<\/body\>)/$editfooter/is;
1174: return $result;
1175: }
1176:
1177: sub get_target {
1178: my $viewgrades=&Apache::lonnet::allowed('vgr',$ENV{'request.course.id'});
1179: if ( $ENV{'request.state'} eq 'published') {
1180: if ( defined($ENV{'form.grade_target'})
1181: && ($viewgrades == 'F' )) {
1182: return ($ENV{'form.grade_target'});
1183: } elsif (defined($ENV{'form.grade_target'})) {
1184: if (($ENV{'form.grade_target'} eq 'web') ||
1185: ($ENV{'form.grade_target'} eq 'tex') ) {
1186: return $ENV{'form.grade_target'}
1187: } else {
1188: return 'web';
1189: }
1190: } else {
1191: return 'web';
1192: }
1193: } elsif ($ENV{'request.state'} eq 'construct') {
1194: if ( defined($ENV{'form.grade_target'})) {
1195: return ($ENV{'form.grade_target'});
1196: } else {
1197: return 'web';
1198: }
1199: } else {
1200: return 'web';
1201: }
1202: }
1203:
1204: sub handler {
1205: my $request=shift;
1206:
1207: my $target=&get_target();
1208:
1209: $Apache::lonxml::debug=$ENV{'user.debug'};
1210:
1211: if ($ENV{'browser.mathml'}) {
1212: &Apache::loncommon::content_type($request,'text/xml');
1213: } else {
1214: &Apache::loncommon::content_type($request,'text/html');
1215: }
1216: &Apache::loncommon::no_cache($request);
1217: $request->send_http_header;
1218:
1219: return OK if $request->header_only;
1220:
1221:
1222: my $file=&Apache::lonnet::filelocation("",$request->uri);
1223: my $filetype;
1224: if ($file =~ /\.sty$/) {
1225: $filetype='sty';
1226: } else {
1227: $filetype='html';
1228: }
1229: #
1230: # Edit action? Save file.
1231: #
1232: unless ($ENV{'request.state'} eq 'published') {
1233: if (($ENV{'form.savethisfile'}) || ($ENV{'form.attemptclean'})) {
1234: if (&storefile($file,$ENV{'form.filecont'})) {
1235: &Apache::lonxml::info("<font COLOR=\"#0000FF\">".
1236: &mt('Updated').": ".
1237: &Apache::lonlocal::locallocaltime(time).
1238: " </font>");
1239: }
1240: }
1241: }
1242: my %mystyle;
1243: my $result = '';
1244: my $filecontents=&Apache::lonnet::getfile($file);
1245: if ($filecontents eq -1) {
1246: my $bodytag=&Apache::loncommon::bodytag('File Error');
1247: my $fnf=&mt('File not found');
1248: $result=(<<ENDNOTFOUND);
1249: <html>
1250: <head>
1251: <title>$fnf</title>
1252: </head>
1253: $bodytag
1254: <b>$fnf: $file</b>
1255: </body>
1256: </html>
1257: ENDNOTFOUND
1258: $filecontents='';
1259: if ($ENV{'request.state'} ne 'published') {
1260: if ($filetype eq 'sty') {
1261: $filecontents=&createnewsty();
1262: } else {
1263: $filecontents=&createnewhtml();
1264: }
1265: $ENV{'form.editmode'}='Edit'; #force edit mode
1266: }
1267: } else {
1268: unless ($ENV{'request.state'} eq 'published') {
1269: if ($ENV{'form.attemptclean'}) {
1270: $filecontents=&htmlclean($filecontents,1);
1271: }
1272: #
1273: # we are in construction space, see if edit mode forced
1274: &Apache::loncommon::get_unprocessed_cgi
1275: ($ENV{'QUERY_STRING'},['editmode']);
1276: }
1277: if (!$ENV{'form.editmode'} || $ENV{'form.viewmode'}) {
1278: $result = &Apache::lonxml::xmlparse($request,$target,$filecontents,
1279: '',%mystyle);
1280: }
1281: }
1282:
1283: #
1284: # Edit action? Insert editing commands
1285: #
1286: unless ($ENV{'request.state'} eq 'published') {
1287: if ($ENV{'form.editmode'} && (!($ENV{'form.viewmode'}))) {
1288: my $displayfile=$request->uri;
1289: $displayfile=~s/^\/[^\/]*//;
1290: $result='<html><body bgcolor="#FFFFFF">'.
1291: &Apache::lonxml::message_location().'<h3>'.
1292: $displayfile.
1293: '</h3></body></html>';
1294: $result=&inserteditinfo($result,$filecontents,$filetype);
1295: }
1296: }
1297: if ($filetype eq 'html') { writeallows($request->uri); }
1298:
1299:
1300: &Apache::lonxml::add_messages(\$result);
1301: $request->print($result);
1302:
1303: return OK;
1304: }
1305:
1306: sub display_title {
1307: my $result;
1308: if ($ENV{'request.state'} eq 'construct') {
1309: my $title=&Apache::lonnet::gettitle();
1310: if (!defined($title) || $title eq '') {
1311: $title = $ENV{'request.filename'};
1312: $title = substr($title, rindex($title, '/') + 1);
1313: }
1314: $result = "<script type='text/javascript'>top.document.title = '$title - LON-CAPA Construction Space';</script>";
1315: }
1316: return $result;
1317: }
1318:
1319: sub debug {
1320: if ($Apache::lonxml::debug eq "1") {
1321: $|=1;
1322: my $request=$Apache::lonxml::request;
1323: if (!$request) { $request=Apache->request; }
1324: $request->print('<font size="-2"><pre>DEBUG:'.&HTML::Entities::encode($_[0])."</pre></font>\n");
1325: }
1326: }
1327:
1328: sub error {
1329: $errorcount++;
1330: my $request=$Apache::lonxml::request;
1331: if (!$request) { $request=Apache->request; }
1332: if (($Apache::lonxml::debug eq 1) || ($ENV{'request.state'} eq 'construct') ) {
1333: # If printing in construction space, put the error inside <pre></pre>
1334: push(@Apache::lonxml::error_messages,
1335: $Apache::lonxml::warnings_error_header.
1336: "<b>ERROR:</b>".join("<br />\n",@_)."<br />\n");
1337: $Apache::lonxml::warnings_error_header='';
1338: } else {
1339: push(@Apache::lonxml::error_messages,
1340: "<b>An Error occured while processing this resource. The instructor has been notified.</b> <br />");
1341: #notify author
1342: &Apache::lonmsg::author_res_msg($ENV{'request.filename'},join('<br />',@_));
1343: #notify course
1344: if ( $ENV{'request.course.id'} ) {
1345: my (undef,%users)=&Apache::lonfeedback::decide_receiver(undef,0,1,1,1);
1346: my $declutter=&Apache::lonnet::declutter($ENV{'request.filename'});
1347: foreach (keys %users) {
1348: my ($user,$domain) = split(/:/, $_);
1349: &Apache::lonmsg::user_normal_msg($user,$domain,
1350: "Error [$declutter]",join('<br />',@_));
1351: }
1352: }
1353: }
1354: }
1355:
1356: sub warning {
1357: $warningcount++;
1358:
1359: if ($ENV{'form.grade_target'} ne 'tex') {
1360: if ($ENV{'request.state'} eq 'construct' || $Apache::lonxml::debug) {
1361: my $request=$Apache::lonxml::request;
1362: if (!$request) { $request=Apache->request; }
1363: push(@Apache::lonxml::warning_messages,
1364: $Apache::lonxml::warnings_error_header.
1365: "<b>W</b>ARNING<b>:</b>".join('<br />',@_)."<br />\n");
1366: $Apache::lonxml::warnings_error_header='';
1367: }
1368: }
1369: }
1370:
1371: sub info {
1372: if ($ENV{'form.grade_target'} ne 'tex'
1373: && $ENV{'request.state'} eq 'construct') {
1374: push(@Apache::lonxml::info_messages,join('<br />',@_)."<br />\n");
1375: }
1376: }
1377:
1378: sub message_location {
1379: return '__LONCAPA_INTERNAL_MESSAGE_LOCATION__';
1380: }
1381:
1382: sub add_messages {
1383: my ($msg)=@_;
1384: my $result=join(' ',
1385: @Apache::lonxml::info_messages,
1386: @Apache::lonxml::error_messages,
1387: @Apache::lonxml::warning_messages);
1388: undef(@Apache::lonxml::info_messages);
1389: undef(@Apache::lonxml::error_messages);
1390: undef(@Apache::lonxml::warning_messages);
1391: $$msg=~s/__LONCAPA_INTERNAL_MESSAGE_LOCATION__/$result/;
1392: $$msg=~s/__LONCAPA_INTERNAL_MESSAGE_LOCATION__//g;
1393: }
1394:
1395: sub get_param {
1396: my ($param,$parstack,$safeeval,$context,$case_insensitive) = @_;
1397: if ( ! $context ) { $context = -1; }
1398: my $args ='';
1399: if ( $#$parstack > (-2-$context) ) { $args=$$parstack[$context]; }
1400: if ( ! $Apache::lonxml::usestyle ) {
1401: $args=$Apache::lonxml::style_values.$args;
1402: }
1403: if ( ! $args ) { return undef; }
1404: if ( $case_insensitive ) {
1405: if ($args =~ s/(my \$)(\Q$param\E)(=\")/$1.lc($2).$3/ei) {
1406: return &Apache::run::run("{$args;".'return $'.$param.'}',
1407: $safeeval); #'
1408: } else {
1409: return undef;
1410: }
1411: } else {
1412: if ( $args =~ /my \$\Q$param\E=\"/ ) {
1413: return &Apache::run::run("{$args;".'return $'.$param.'}',
1414: $safeeval); #'
1415: } else {
1416: return undef;
1417: }
1418: }
1419: }
1420:
1421: sub get_param_var {
1422: my ($param,$parstack,$safeeval,$context,$case_insensitive) = @_;
1423: if ( ! $context ) { $context = -1; }
1424: my $args ='';
1425: if ( $#$parstack > (-2-$context) ) { $args=$$parstack[$context]; }
1426: if ( ! $Apache::lonxml::usestyle ) {
1427: $args=$Apache::lonxml::style_values.$args;
1428: }
1429: &Apache::lonxml::debug("Args are $args param is $param");
1430: if ($case_insensitive) {
1431: if (! ($args=~s/(my \$)(\Q$param\E)(=\")/$1.lc($2).$3/ei)) {
1432: return undef;
1433: }
1434: } elsif ( $args !~ /my \$\Q$param\E=\"/ ) { return undef; }
1435: my $value=&Apache::run::run("{$args;".'return $'.$param.'}',$safeeval); #'
1436: &Apache::lonxml::debug("first run is $value");
1437: if ($value =~ /^[\$\@\%]\w+$/) {
1438: &Apache::lonxml::debug("doing second");
1439: my @result=&Apache::run::run("return $value",$safeeval,1);
1440: if (!defined($result[0])) {
1441: return $value
1442: } else {
1443: if (wantarray) { return @result; } else { return $result[0]; }
1444: }
1445: } else {
1446: return $value;
1447: }
1448: }
1449:
1450: sub register_insert {
1451: my @data = split /\n/, &Apache::lonnet::getfile('/home/httpd/lonTabs/insertlist.tab');
1452: my $i;
1453: my $tagnum=0;
1454: my @order;
1455: for ($i=0;$i < $#data; $i++) {
1456: my $line = $data[$i];
1457: if ( $line =~ /^\#/ || $line =~ /^\s*\n/) { next; }
1458: if ( $line =~ /TABLE/ ) { last; }
1459: my ($tag,$descrip,$color,$function,$show,$helpfile,$helpdesc) = split(/,/, $line);
1460: if ($tag) {
1461: $insertlist{"$tagnum.tag"} = $tag;
1462: $insertlist{"$tagnum.description"} = $descrip;
1463: $insertlist{"$tagnum.color"} = $color;
1464: $insertlist{"$tagnum.function"} = $function;
1465: if (!defined($show)) { $show='yes'; }
1466: $insertlist{"$tagnum.show"}= $show;
1467: $insertlist{"$tagnum.helpfile"} = $helpfile;
1468: $insertlist{"$tagnum.helpdesc"} = $helpdesc;
1469: $insertlist{"$tag.num"}=$tagnum;
1470: $tagnum++;
1471: }
1472: }
1473: $i++; #skipping TABLE line
1474: $tagnum = 0;
1475: for (;$i < $#data;$i++) {
1476: my $line = $data[$i];
1477: my ($mnemonic,@which) = split(/ +/,$line);
1478: my $tag = $insertlist{"$tagnum.tag"};
1479: for (my $j=0;$j <=$#which;$j++) {
1480: if ( $which[$j] eq 'Y' ) {
1481: if ($insertlist{"$j.show"} ne 'no') {
1482: push(@{ $insertlist{"$tag.which"} },$j);
1483: }
1484: }
1485: }
1486: $tagnum++;
1487: }
1488: }
1489:
1490: sub description {
1491: my ($token)=@_;
1492: my $tagnum;
1493: my $tag=$token->[1];
1494: foreach my $namespace (reverse @Apache::lonxml::namespace) {
1495: my $testtag=$namespace.'::'.$tag;
1496: $tagnum=$insertlist{"$testtag.num"};
1497: if (defined($tagnum)) { last; }
1498: }
1499: if (!defined ($tagnum)) { $tagnum=$Apache::lonxml::insertlist{"$tag.num"}; }
1500: return $insertlist{$tagnum.'.description'};
1501: }
1502:
1503: # Returns a list containing the help file, and the description
1504: sub helpinfo {
1505: my ($token)=@_;
1506: my $tagnum;
1507: my $tag=$token->[1];
1508: foreach my $namespace (reverse @Apache::lonxml::namespace) {
1509: my $testtag=$namespace.'::'.$tag;
1510: $tagnum=$insertlist{"$testtag.num"};
1511: if (defined($tagnum)) { last; }
1512: }
1513: if (!defined ($tagnum)) { $tagnum=$Apache::lonxml::insertlist{"$tag.num"}; }
1514: return ($insertlist{$tagnum.'.helpfile'}, $insertlist{$tagnum.'.helpdesc'});
1515: }
1516:
1517: # ----------------------------------------------------------------- whichuser
1518: # returns a list of $symb, $courseid, $domain, $name that is correct for
1519: # calls to lonnet functions for this setup.
1520: # - looks for form.grade_ parameters
1521: sub whichuser {
1522: my ($passedsymb)=@_;
1523: my ($symb,$courseid,$domain,$name,$publicuser);
1524: if (defined($ENV{'form.grade_symb'})) {
1525: my $tmp_courseid=$ENV{'form.grade_courseid'};
1526: my $allowed=&Apache::lonnet::allowed('vgr',$tmp_courseid);
1527: if ($allowed) {
1528: $symb=$ENV{'form.grade_symb'};
1529: $courseid=$ENV{'form.grade_courseid'};
1530: $domain=$ENV{'form.grade_domain'};
1531: $name=$ENV{'form.grade_username'};
1532: }
1533: } else {
1534: if (!$passedsymb) {
1535: $symb=&Apache::lonnet::symbread();
1536: } else {
1537: $symb=$passedsymb;
1538: }
1539: $courseid=$ENV{'request.course.id'};
1540: $domain=$ENV{'user.domain'};
1541: $name=$ENV{'user.name'};
1542: if ($name eq 'public' && $domain eq 'public') {
1543: if (!defined($ENV{'form.username'})) {
1544: $ENV{'form.username'}.=time.rand(10000000);
1545: }
1546: $name.=$ENV{'form.username'};
1547: }
1548: }
1549: return ($symb,$courseid,$domain,$name,$publicuser);
1550: }
1551:
1552: 1;
1553: __END__
1554:
1555:
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