1: # The LearningOnline Network with CAPA
2: # XML Parser Module
3: #
4: # $Id: lonxml.pm,v 1.505.2.7 2011/12/01 04:41:55 raeburn 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:
40: =pod
41:
42: =head1 NAME
43:
44: Apache::lonxml
45:
46: =head1 SYNOPSIS
47:
48: XML Parsing Module
49:
50: This is part of the LearningOnline Network with CAPA project
51: described at http://www.lon-capa.org.
52:
53:
54: =head1 SUBROUTINES
55:
56: =cut
57:
58:
59:
60: package Apache::lonxml;
61: use vars
62: qw(@pwd @outputstack $redirection $import @extlinks $metamode $evaluate %insertlist @namespace $errorcount $warningcount);
63: use strict;
64: use LONCAPA;
65: use HTML::LCParser();
66: use HTML::TreeBuilder();
67: use HTML::Entities();
68: use Safe();
69: use Safe::Hole();
70: use Math::Cephes();
71: use Math::Random();
72: use Opcode();
73: use POSIX qw(strftime);
74: use Time::HiRes qw( gettimeofday tv_interval );
75: use Symbol();
76:
77: sub register {
78: my ($space,@taglist) = @_;
79: foreach my $temptag (@taglist) {
80: push(@{ $Apache::lonxml::alltags{$temptag} },$space);
81: }
82: }
83:
84: sub deregister {
85: my ($space,@taglist) = @_;
86: foreach my $temptag (@taglist) {
87: my $tempspace = $Apache::lonxml::alltags{$temptag}[-1];
88: if ($tempspace eq $space) {
89: pop(@{ $Apache::lonxml::alltags{$temptag} });
90: }
91: }
92: #&printalltags();
93: }
94:
95: use Apache::Constants qw(:common);
96: use Apache::lontexconvert();
97: use Apache::style();
98: use Apache::run();
99: use Apache::londefdef();
100: use Apache::scripttag();
101: use Apache::languagetags();
102: use Apache::edit();
103: use Apache::inputtags();
104: use Apache::outputtags();
105: use Apache::lonnet;
106: use Apache::File();
107: use Apache::loncommon();
108: use Apache::lonfeedback();
109: use Apache::lonmsg();
110: use Apache::loncacc();
111: use Apache::lonmaxima();
112: use Apache::lonr();
113: use Apache::lonlocal;
114: use Apache::lonhtmlcommon();
115: use Apache::functionplotresponse();
116:
117: #==================================== Main subroutine: xmlparse
118:
119: #debugging control, to turn on debugging modify the correct handler
120:
121: $Apache::lonxml::debug=0;
122:
123: # keeps count of the number of warnings and errors generated in a parse
124: $warningcount=0;
125: $errorcount=0;
126:
127: #path to the directory containing the file currently being processed
128: @pwd=();
129:
130: #these two are used for capturing a subset of the output for later processing,
131: #don't touch them directly use &startredirection and &endredirection
132: @outputstack = ();
133: $redirection = 0;
134:
135: #controls wheter the <import> tag actually does
136: $import = 1;
137: @extlinks=();
138:
139: # meta mode is a bit weird only some output is to be turned off
140: #<output> tag turns metamode off (defined in londefdef.pm)
141: $metamode = 0;
142:
143: # turns on and of run::evaluate actually derefencing var refs
144: $evaluate = 1;
145:
146: # data structure for eidt mode, determines what tags can go into what other tags
147: %insertlist=();
148:
149: # stores the list of active tag namespaces
150: @namespace=();
151:
152: # stores all Scrit Vars displays for later showing
153: my @script_var_displays=();
154:
155: # a pointer the the Apache request object
156: $Apache::lonxml::request='';
157:
158: # a problem number counter, and check on ether it is used
159: $Apache::lonxml::counter=1;
160: $Apache::lonxml::counter_changed=0;
161:
162: # Part counter hash. In analysis mode, the
163: # problems can use this to record which parts increment the counter
164: # by how much. The counter subs will maintain this hash via
165: # their optional part parameters. Note that the assumption is that
166: # analysis is done in one request and therefore it is not necessary to
167: # save this information request-to-request.
168:
169:
170: %Apache::lonxml::counters_per_part = ();
171:
172: #internal check on whether to look at style defs
173: $Apache::lonxml::usestyle=1;
174:
175: #locations used to store the parameter string for style substitutions
176: $Apache::lonxml::style_values='';
177: $Apache::lonxml::style_end_values='';
178:
179: #array of ssi calls that need to occur after we are done parsing
180: @Apache::lonxml::ssi_info=();
181:
182: #should we do the postag variable interpolation
183: $Apache::lonxml::post_evaluate=1;
184:
185: #a header message to emit in the case of any generated warning or errors
186: $Apache::lonxml::warnings_error_header='';
187:
188: # Control whether or not LaTeX symbols should be substituted for their
189: # \ style equivalents...this may be turned off e.g. in an verbatim
190: # environment.
191:
192: $Apache::lonxml::substitute_LaTeX_symbols = 1; # Starts out on.
193:
194: sub enable_LaTeX_substitutions {
195: $Apache::lonxml::substitute_LaTeX_symbols = 1;
196: }
197: sub disable_LaTeX_substitutions {
198: $Apache::lonxml::substitute_LaTeX_symbols = 0;
199: }
200:
201: sub xmlend {
202: my ($target,$parser)=@_;
203: my $mode='xml';
204: my $status='OPEN';
205: if ($Apache::lonhomework::parsing_a_problem ||
206: $Apache::lonhomework::parsing_a_task ) {
207: $mode='problem';
208: $status=$Apache::inputtags::status[-1];
209: }
210: my $discussion;
211: &Apache::loncommon::get_unprocessed_cgi($ENV{'QUERY_STRING'},
212: ['LONCAPA_INTERNAL_no_discussion']);
213: if (! exists($env{'form.LONCAPA_INTERNAL_no_discussion'}) ||
214: $env{'form.LONCAPA_INTERNAL_no_discussion'} ne 'true') {
215: $discussion=&Apache::lonfeedback::list_discussion($mode,$status);
216: }
217: if ($target eq 'tex') {
218: $discussion.='<tex>\keephidden{ENDOFPROBLEM}\vskip 0.5mm\noindent\makebox[\textwidth/$number_of_columns][b]{\hrulefill}\end{document}</tex>';
219: &Apache::lonxml::newparser($parser,\$discussion,'');
220: return '';
221: }
222:
223: return $discussion;
224: }
225:
226: sub tokeninputfield {
227: my $defhost=$Apache::lonnet::perlvar{'lonHostID'};
228: $defhost=~tr/a-z/A-Z/;
229: return (<<ENDINPUTFIELD)
230: <script type="text/javascript">
231: function updatetoken() {
232: var comp=new Array;
233: var barcode=unescape(document.tokeninput.barcode.value);
234: comp=barcode.split('*');
235: if (typeof(comp[0])!="undefined") {
236: document.tokeninput.codeone.value=comp[0];
237: }
238: if (typeof(comp[1])!="undefined") {
239: document.tokeninput.codetwo.value=comp[1];
240: }
241: if (typeof(comp[2])!="undefined") {
242: comp[2]=comp[2].toUpperCase();
243: document.tokeninput.codethree.value=comp[2];
244: }
245: document.tokeninput.barcode.value='';
246: }
247: </script>
248: <form method="post" name="tokeninput" action="">
249: <table border="2" bgcolor="#FFFFBB">
250: <tr><th>DocID Checkin</th></tr>
251: <tr><td>
252: <table>
253: <tr>
254: <td>Scan in Barcode</td>
255: <td><input type="text" size="22" name="barcode"
256: onchange="updatetoken()"/></td>
257: </tr>
258: <tr><td><i>or</i> Type in DocID</td>
259: <td>
260: <input type="text" size="5" name="codeone" />
261: <b><font size="+2">*</font></b>
262: <input type="text" size="5" name="codetwo" />
263: <b><font size="+2">*</font></b>
264: <input type="text" size="10" name="codethree" value="$defhost"
265: onchange="this.value=this.value.toUpperCase()" />
266: </td></tr>
267: </table>
268: </td></tr>
269: <tr><td><input type="submit" value="Check in DocID" /></td></tr>
270: </table>
271: </form>
272: ENDINPUTFIELD
273: }
274:
275: sub maketoken {
276: my ($symb,$tuname,$tudom,$tcrsid)=@_;
277: unless ($symb) {
278: $symb=&Apache::lonnet::symbread();
279: }
280: unless ($tuname) {
281: $tuname=$env{'user.name'};
282: $tudom=$env{'user.domain'};
283: $tcrsid=$env{'request.course.id'};
284: }
285:
286: return &Apache::lonnet::checkout($symb,$tuname,$tudom,$tcrsid);
287: }
288:
289: sub printtokenheader {
290: my ($target,$token,$tsymb,$tcrsid,$tudom,$tuname)=@_;
291: unless ($token) { return ''; }
292:
293: my ($symb,$courseid,$domain,$name) = &Apache::lonnet::whichuser();
294: unless ($tsymb) {
295: $tsymb=$symb;
296: }
297: unless ($tuname) {
298: $tuname=$name;
299: $tudom=$domain;
300: $tcrsid=$courseid;
301: }
302:
303: my $plainname=&Apache::loncommon::plainname($tuname,$tudom);
304:
305: if ($target eq 'web') {
306: my %idhash=&Apache::lonnet::idrget($tudom,($tuname));
307: return
308: '<img align="right" src="/cgi-bin/barcode.png?encode='.$token.'" />'.
309: &mt('Checked out for').' '.$plainname.
310: '<br />'.&mt('User').': '.$tuname.' at '.$tudom.
311: '<br />'.&mt('ID').': '.$idhash{$tuname}.
312: '<br />'.&mt('CourseID').': '.$tcrsid.
313: '<br />'.&mt('Course').': '.$env{'course.'.$tcrsid.'.description'}.
314: '<br />'.&mt('DocID').': '.$token.
315: '<br />'.&mt('Time').': '.&Apache::lonlocal::locallocaltime().'<hr />';
316: } else {
317: return $token;
318: }
319: }
320:
321: sub printalltags {
322: my $temp;
323: foreach $temp (sort keys %Apache::lonxml::alltags) {
324: &Apache::lonxml::debug("$temp -- ".
325: join(',',@{ $Apache::lonxml::alltags{$temp} }));
326: }
327: }
328:
329: sub xmlparse {
330: my ($request,$target,$content_file_string,$safeinit,%style_for_target) = @_;
331:
332: &setup_globals($request,$target);
333: &Apache::inputtags::initialize_inputtags();
334: &Apache::bridgetask::initialize_bridgetask();
335: &Apache::outputtags::initialize_outputtags();
336: &Apache::edit::initialize_edit();
337: &Apache::londefdef::initialize_londefdef();
338:
339: #
340: # do we have a course style file?
341: #
342:
343: if ($env{'request.course.id'} && $env{'request.state'} ne 'construct') {
344: my $bodytext=
345: $env{'course.'.$env{'request.course.id'}.'.default_xml_style'};
346: if ($bodytext) {
347: foreach my $file (split(',',$bodytext)) {
348: my $location=&Apache::lonnet::filelocation('',$file);
349: my $styletext=&Apache::lonnet::getfile($location);
350: if ($styletext ne '-1') {
351: %style_for_target = (%style_for_target,
352: &Apache::style::styleparser($target,$styletext));
353: }
354: }
355: }
356: } elsif ($env{'construct.style'}
357: && ($env{'request.state'} eq 'construct')) {
358: my $location=&Apache::lonnet::filelocation('',$env{'construct.style'});
359: my $styletext=&Apache::lonnet::getfile($location);
360: if ($styletext ne '-1') {
361: %style_for_target = (%style_for_target,
362: &Apache::style::styleparser($target,$styletext));
363: }
364: }
365: #&printalltags();
366: my @pars = ();
367: my $pwd=$env{'request.filename'};
368: $pwd =~ s:/[^/]*$::;
369: &newparser(\@pars,\$content_file_string,$pwd);
370:
371: my $safeeval = new Safe;
372: my $safehole = new Safe::Hole;
373: &init_safespace($target,$safeeval,$safehole,$safeinit);
374: #-------------------- Redefinition of the target in the case of compound target
375:
376: ($target, my @tenta) = split('&&',$target);
377:
378: my @stack = ();
379: my @parstack = ();
380: &initdepth();
381: &init_alarm();
382: my $finaloutput = &inner_xmlparse($target,\@stack,\@parstack,\@pars,
383: $safeeval,\%style_for_target,1);
384:
385: if (@stack) {
386: &warning(&mt('At end of file some tags were still left unclosed:').
387: ' <tt><'.join('></tt>, <tt><',reverse(@stack)).
388: '></tt>');
389: }
390: if ($env{'request.uri'}) {
391: &writeallows($env{'request.uri'});
392: }
393: &do_registered_ssi();
394: if ($Apache::lonxml::counter_changed) { &store_counter() }
395:
396: &clean_safespace($safeeval);
397:
398: if (@script_var_displays) {
399: $finaloutput .= join('',@script_var_displays);
400: undef(@script_var_displays);
401: }
402: &init_state();
403: if ($env{'form.return_only_error_and_warning_counts'}) {
404: if ($env{'request.filename'}=~/\.(html|htm|xml)$/i) {
405: my $error=&verify_html($content_file_string);
406: if ($error) { $errorcount++; }
407: }
408: return "$errorcount:$warningcount";
409: }
410: return $finaloutput;
411: }
412:
413: sub latex_special_symbols {
414: my ($string,$where)=@_;
415: #
416: # If e.g. in verbatim mode, then don't substitute.
417: # but return original string.
418: #
419: if (!($Apache::lonxml::substitute_LaTeX_symbols)) {
420: return $string;
421: }
422: if ($where eq 'header') {
423: $string =~ s/\\/\$\\backslash\$/g; # \ -> $\backslash$ per LaTex line by line pg 10.
424: $string =~ s/(\$|%|\{|\})/\\$1/g;
425: $string=&Apache::lonprintout::character_chart($string);
426: # any & or # leftover should be safe to just escape
427: $string=~s/([^\\])\&/$1\\\&/g;
428: $string=~s/([^\\])\#/$1\\\#/g;
429: $string =~ s/_/\\_/g; # _ -> \_
430: $string =~ s/\^/\\\^{}/g; # ^ -> \^{}
431: } else {
432: $string=~s/\\/\\ensuremath{\\backslash}/g;
433: $string=~s/\\\%|\%/\\\%/g;
434: $string=~s/\\{|{/\\{/g;
435: $string=~s/\\}|}/\\}/g;
436: $string=~s/\\ensuremath\\{\\backslash\\}/\\ensuremath{\\backslash}/g;
437: $string=~s/\\\$|\$/\\\$/g;
438: $string=~s/\\\_|\_/\\\_/g;
439: $string=~s/([^\\]|^)(\~|\^)/$1\\$2\\strut /g;
440: $string=~s/(>|<)/\\ensuremath\{$1\}/g; #more or less
441: $string=&Apache::lonprintout::character_chart($string);
442: # any & or # leftover should be safe to just escape
443: $string=~s/\\\&|\&/\\\&/g;
444: $string=~s/\\\#|\#/\\\#/g;
445: $string=~s/\|/\$\\mid\$/g;
446: #single { or } How to escape?
447: }
448: return $string;
449: }
450:
451: sub inner_xmlparse {
452: my ($target,$stack,$parstack,$pars,$safeeval,$style_for_target,$start)=@_;
453: my $finaloutput = '';
454: my $result;
455: my $token;
456: my $dontpop=0;
457: my $startredirection = $Apache::lonxml::redirection;
458: while ( $#$pars > -1 ) {
459: while ($token = $$pars['-1']->get_token) {
460: if (($token->[0] eq 'T') || ($token->[0] eq 'C') ) {
461: if ($metamode<1) {
462: my $text=$token->[1];
463: if ($token->[0] eq 'C' && $target eq 'tex') {
464: $text = '';
465: # $text = '%'.$text."\n";
466: }
467: $result.=$text;
468: }
469: } elsif (($token->[0] eq 'D')) {
470: if ($metamode<1 && $target eq 'web') {
471: my $text=$token->[1];
472: $result.=$text;
473: }
474: } elsif ($token->[0] eq 'PI') {
475: if ($metamode<1 && $target eq 'web') {
476: $result=$token->[2];
477: }
478: } elsif ($token->[0] eq 'S') {
479: # add tag to stack
480: push (@$stack,$token->[1]);
481: # add parameters list to another stack
482: push (@$parstack,&parstring($token));
483: &increasedepth($token);
484: if ($Apache::lonxml::usestyle &&
485: exists($$style_for_target{$token->[1]})) {
486: $Apache::lonxml::usestyle=0;
487: my $string=$$style_for_target{$token->[1]}.
488: '<LONCAPA_INTERNAL_TURN_STYLE_ON />';
489: &Apache::lonxml::newparser($pars,\$string);
490: $Apache::lonxml::style_values=$$parstack[-1];
491: $Apache::lonxml::style_end_values=$$parstack[-1];
492: } else {
493: $result = &callsub("start_$token->[1]", $target, $token, $stack,
494: $parstack, $pars, $safeeval, $style_for_target);
495: }
496: } elsif ($token->[0] eq 'E') {
497: if ($Apache::lonxml::usestyle &&
498: exists($$style_for_target{'/'."$token->[1]"})) {
499: $Apache::lonxml::usestyle=0;
500: my $string=$$style_for_target{'/'.$token->[1]}.
501: '<LONCAPA_INTERNAL_TURN_STYLE_ON end="'.$token->[1].'" />';
502: &Apache::lonxml::newparser($pars,\$string);
503: $Apache::lonxml::style_values=$Apache::lonxml::style_end_values;
504: $Apache::lonxml::style_end_values='';
505: $dontpop=1;
506: } else {
507: #clear out any tags that didn't end
508: while ($token->[1] ne $$stack['-1'] && ($#$stack > -1)) {
509: my $lasttag=$$stack[-1];
510: if ($token->[1] =~ /^\Q$lasttag\E$/i) {
511: &Apache::lonxml::warning(&mt('Using tag [_1] on line [_2] as end tag to [_3]','</'.$token->[1].'>','.$token->[3].','<'.$$stack[-1].'>'));
512: last;
513: } else {
514: &Apache::lonxml::warning(&mt('Found tag [_1] on line [_2] when looking for [_3] in file.','</'.$token->[1].'>',$token->[3],'</'.$$stack[-1].'>'));
515: &end_tag($stack,$parstack,$token);
516: }
517: }
518: $result = &callsub("end_$token->[1]", $target, $token, $stack,
519: $parstack, $pars,$safeeval, $style_for_target);
520: }
521: } else {
522: &Apache::lonxml::error("Unknown token event :$token->[0]:$token->[1]:");
523: }
524: #evaluate variable refs in result
525: if ($Apache::lonxml::post_evaluate &&$result ne "") {
526: my $extras;
527: if (!$Apache::lonxml::usestyle) {
528: $extras=$Apache::lonxml::style_values;
529: }
530: if ( $#$parstack > -1 ) {
531: $result=&Apache::run::evaluate($result,$safeeval,$extras.$$parstack[-1]);
532: } else {
533: $result= &Apache::run::evaluate($result,$safeeval,$extras);
534: }
535: }
536: $Apache::lonxml::post_evaluate=1;
537:
538: if (($token->[0] eq 'T') || ($token->[0] eq 'C') || ($token->[0] eq 'D') ) {
539: #Style file definitions should be correct
540: if ($target eq 'tex' && ($Apache::lonxml::usestyle)) {
541: $result=&latex_special_symbols($result);
542: }
543: }
544:
545: if ($Apache::lonxml::redirection) {
546: $Apache::lonxml::outputstack['-1'] .= $result;
547: } else {
548: $finaloutput.=$result;
549: }
550: $result = '';
551:
552: if ($token->[0] eq 'E' && !$dontpop) {
553: &end_tag($stack,$parstack,$token);
554: }
555: $dontpop=0;
556: }
557: if ($#$pars > -1) {
558: pop @$pars;
559: pop @Apache::lonxml::pwd;
560: }
561: }
562:
563: # if ($target eq 'meta') {
564: # $finaloutput.=&endredirection;
565: # }
566:
567: if ( $start && $target eq 'grade') { &endredirection(); }
568: if ( $Apache::lonxml::redirection > $startredirection) {
569: while ($Apache::lonxml::redirection > $startredirection) {
570: $finaloutput .= &endredirection();
571: }
572: }
573: if (($ENV{'QUERY_STRING'}) && ($target eq 'web')) {
574: $finaloutput=&afterburn($finaloutput);
575: }
576: if ($target eq 'modified') {
577: # if modfied, handle startpart and endpart
578: $finaloutput=~s/\<startpartmarker[^\>]*\>(.*)\<endpartmarker[^\>]*\>/<part>$1<\/part>/gs;
579: }
580: return $finaloutput;
581: }
582:
583: ##
584: ## Looks to see if there is a subroutine defined for this tag. If so, call it,
585: ## otherwise do not call it as we do not know what it is.
586: ##
587: sub callsub {
588: my ($sub,$target,$token,$tagstack,$parstack,$parser,$safeeval,$style)=@_;
589: my $currentstring='';
590: my $nodefault;
591: {
592: my $sub1;
593: no strict 'refs';
594: my $tag=$token->[1];
595: # get utterly rid of extended html tags
596: if ($tag=~/^x\-/i) { return ''; }
597: my $space=$Apache::lonxml::alltags{$tag}[-1];
598: if (!$space) {
599: $tag=~tr/A-Z/a-z/;
600: $sub=~tr/A-Z/a-z/;
601: $space=$Apache::lonxml::alltags{$tag}[-1]
602: }
603:
604: my $deleted=0;
605: if (($token->[0] eq 'S') && ($target eq 'modified')) {
606: $deleted=&Apache::edit::handle_delete($space,$target,$token,$tagstack,
607: $parstack,$parser,$safeeval,
608: $style);
609: }
610: if (!$deleted) {
611: if ($space) {
612: #&Apache::lonxml::debug("Calling sub $sub in $space $metamode");
613: $sub1="$space\:\:$sub";
614: ($currentstring,$nodefault) = &$sub1($target,$token,$tagstack,
615: $parstack,$parser,$safeeval,
616: $style);
617: } else {
618: if ($target eq 'tex') {
619: # throw away tag name
620: return '';
621: }
622: #&Apache::lonxml::debug("NOT Calling sub $sub in $space $metamode");
623: if ($metamode <1) {
624: if (defined($token->[4]) && ($metamode < 1)) {
625: $currentstring = $token->[4];
626: } else {
627: $currentstring = $token->[2];
628: }
629: }
630: }
631: # &Apache::lonxml::debug("nodefalt:$nodefault:");
632: if ($currentstring eq '' && $nodefault eq '') {
633: if ($target eq 'edit') {
634: #&Apache::lonxml::debug("doing default edit for $token->[1]");
635: if ($token->[0] eq 'S') {
636: $currentstring = &Apache::edit::tag_start($target,$token);
637: } elsif ($token->[0] eq 'E') {
638: $currentstring = &Apache::edit::tag_end($target,$token);
639: }
640: }
641: }
642: if ($target eq 'modified' && $nodefault eq '') {
643: if ($currentstring eq '') {
644: if ($token->[0] eq 'S') {
645: $currentstring = $token->[4];
646: } elsif ($token->[0] eq 'E') {
647: $currentstring = $token->[2];
648: } else {
649: $currentstring = $token->[2];
650: }
651: }
652: if ($token->[0] eq 'S') {
653: $currentstring.=&Apache::edit::handle_insert();
654: } elsif ($token->[0] eq 'E') {
655: $currentstring.=&Apache::edit::handle_insertafter($token->[1]);
656: }
657: }
658: }
659: use strict 'refs';
660: }
661: return $currentstring;
662: }
663:
664: {
665: my %state;
666:
667: sub init_state {
668: undef(%state);
669: }
670:
671: sub set_state {
672: my ($key,$value) = @_;
673: $state{$key} = $value;
674: return $value;
675: }
676: sub get_state {
677: my ($key) = @_;
678: return $state{$key};
679: }
680: }
681:
682: sub setup_globals {
683: my ($request,$target)=@_;
684: $Apache::lonxml::request=$request;
685: $errorcount=0;
686: $warningcount=0;
687: $Apache::lonxml::internal_error=0;
688: $Apache::lonxml::default_homework_loaded=0;
689: $Apache::lonxml::usestyle=1;
690: &init_counter();
691: &clear_bubble_lines_for_part();
692: &init_state();
693: &set_state('target',$target);
694: @Apache::lonxml::pwd=();
695: @Apache::lonxml::extlinks=();
696: @script_var_displays=();
697: @Apache::lonxml::ssi_info=();
698: $Apache::lonxml::post_evaluate=1;
699: $Apache::lonxml::warnings_error_header='';
700: $Apache::lonxml::substitute_LaTeX_symbols = 1;
701: if ($target eq 'meta') {
702: $Apache::lonxml::redirection = 0;
703: $Apache::lonxml::metamode = 1;
704: $Apache::lonxml::evaluate = 1;
705: $Apache::lonxml::import = 0;
706: } elsif ($target eq 'answer') {
707: $Apache::lonxml::redirection = 0;
708: $Apache::lonxml::metamode = 1;
709: $Apache::lonxml::evaluate = 1;
710: $Apache::lonxml::import = 1;
711: } elsif ($target eq 'grade') {
712: &startredirection(); #ended in inner_xmlparse on exit
713: $Apache::lonxml::metamode = 0;
714: $Apache::lonxml::evaluate = 1;
715: $Apache::lonxml::import = 1;
716: } elsif ($target eq 'modified') {
717: $Apache::lonxml::redirection = 0;
718: $Apache::lonxml::metamode = 0;
719: $Apache::lonxml::evaluate = 0;
720: $Apache::lonxml::import = 0;
721: } elsif ($target eq 'edit') {
722: $Apache::lonxml::redirection = 0;
723: $Apache::lonxml::metamode = 0;
724: $Apache::lonxml::evaluate = 0;
725: $Apache::lonxml::import = 0;
726: } elsif ($target eq 'analyze') {
727: $Apache::lonxml::redirection = 0;
728: $Apache::lonxml::metamode = 0;
729: $Apache::lonxml::evaluate = 1;
730: $Apache::lonxml::import = 1;
731: } else {
732: $Apache::lonxml::redirection = 0;
733: $Apache::lonxml::metamode = 0;
734: $Apache::lonxml::evaluate = 1;
735: $Apache::lonxml::import = 1;
736: }
737: }
738:
739: sub init_safespace {
740: my ($target,$safeeval,$safehole,$safeinit) = @_;
741: $safeeval->deny_only(':dangerous');
742: $safeeval->reval('use Math::Complex;');
743: $safeeval->permit_only(":default");
744: $safeeval->permit("entereval");
745: $safeeval->permit(":base_math");
746: $safeeval->permit("sort");
747: $safeeval->permit("time");
748: $safeeval->permit("caller");
749: $safeeval->deny("rand");
750: $safeeval->deny("srand");
751: $safeeval->deny(":base_io");
752: $safehole->wrap(\&Apache::scripttag::xmlparse,$safeeval,'&xmlparse');
753: $safehole->wrap(\&Apache::outputtags::multipart,$safeeval,'&multipart');
754: $safehole->wrap(\&Apache::lonnet::EXT,$safeeval,'&EXT');
755: $safehole->wrap(\&Apache::chemresponse::chem_standard_order,$safeeval,
756: '&chem_standard_order');
757: $safehole->wrap(\&Apache::response::check_status,$safeeval,'&check_status');
758: $safehole->wrap(\&Apache::response::implicit_multiplication,$safeeval,'&implicit_multiplication');
759:
760: $safehole->wrap(\&Apache::lonmaxima::maxima_eval,$safeeval,'&maxima_eval');
761: $safehole->wrap(\&Apache::lonmaxima::maxima_check,$safeeval,'&maxima_check');
762: $safehole->wrap(\&Apache::lonmaxima::maxima_cas_formula_fix,$safeeval,
763: '&maxima_cas_formula_fix');
764:
765: $safehole->wrap(\&Apache::lonr::r_eval,$safeeval,'&r_eval');
766: $safehole->wrap(\&Apache::lonr::Rentry,$safeeval,'&Rentry');
767: $safehole->wrap(\&Apache::lonr::Rarray,$safeeval,'&Rarray');
768: $safehole->wrap(\&Apache::lonr::r_check,$safeeval,'&r_check');
769: $safehole->wrap(\&Apache::lonr::r_cas_formula_fix,$safeeval,
770: '&r_cas_formula_fix');
771:
772: $safehole->wrap(\&Apache::caparesponse::capa_formula_fix,$safeeval,
773: '&capa_formula_fix');
774:
775: $safehole->wrap(\&Apache::lonlocal::locallocaltime,$safeeval,
776: '&locallocaltime');
777:
778: $safehole->wrap(\&Math::Cephes::asin,$safeeval,'&asin');
779: $safehole->wrap(\&Math::Cephes::acos,$safeeval,'&acos');
780: $safehole->wrap(\&Math::Cephes::atan,$safeeval,'&atan');
781: $safehole->wrap(\&Math::Cephes::sinh,$safeeval,'&sinh');
782: $safehole->wrap(\&Math::Cephes::cosh,$safeeval,'&cosh');
783: $safehole->wrap(\&Math::Cephes::tanh,$safeeval,'&tanh');
784: $safehole->wrap(\&Math::Cephes::asinh,$safeeval,'&asinh');
785: $safehole->wrap(\&Math::Cephes::acosh,$safeeval,'&acosh');
786: $safehole->wrap(\&Math::Cephes::atanh,$safeeval,'&atanh');
787: $safehole->wrap(\&Math::Cephes::erf,$safeeval,'&erf');
788: $safehole->wrap(\&Math::Cephes::erfc,$safeeval,'&erfc');
789: $safehole->wrap(\&Math::Cephes::j0,$safeeval,'&j0');
790: $safehole->wrap(\&Math::Cephes::j1,$safeeval,'&j1');
791: $safehole->wrap(\&Math::Cephes::jn,$safeeval,'&jn');
792: $safehole->wrap(\&Math::Cephes::jv,$safeeval,'&jv');
793: $safehole->wrap(\&Math::Cephes::y0,$safeeval,'&y0');
794: $safehole->wrap(\&Math::Cephes::y1,$safeeval,'&y1');
795: $safehole->wrap(\&Math::Cephes::yn,$safeeval,'&yn');
796: $safehole->wrap(\&Math::Cephes::yv,$safeeval,'&yv');
797:
798: $safehole->wrap(\&Math::Cephes::bdtr ,$safeeval,'&bdtr' );
799: $safehole->wrap(\&Math::Cephes::bdtrc ,$safeeval,'&bdtrc' );
800: $safehole->wrap(\&Math::Cephes::bdtri ,$safeeval,'&bdtri' );
801: $safehole->wrap(\&Math::Cephes::btdtr ,$safeeval,'&btdtr' );
802: $safehole->wrap(\&Math::Cephes::chdtr ,$safeeval,'&chdtr' );
803: $safehole->wrap(\&Math::Cephes::chdtrc,$safeeval,'&chdtrc');
804: $safehole->wrap(\&Math::Cephes::chdtri,$safeeval,'&chdtri');
805: $safehole->wrap(\&Math::Cephes::fdtr ,$safeeval,'&fdtr' );
806: $safehole->wrap(\&Math::Cephes::fdtrc ,$safeeval,'&fdtrc' );
807: $safehole->wrap(\&Math::Cephes::fdtri ,$safeeval,'&fdtri' );
808: $safehole->wrap(\&Math::Cephes::gdtr ,$safeeval,'&gdtr' );
809: $safehole->wrap(\&Math::Cephes::gdtrc ,$safeeval,'&gdtrc' );
810: $safehole->wrap(\&Math::Cephes::nbdtr ,$safeeval,'&nbdtr' );
811: $safehole->wrap(\&Math::Cephes::nbdtrc,$safeeval,'&nbdtrc');
812: $safehole->wrap(\&Math::Cephes::nbdtri,$safeeval,'&nbdtri');
813: $safehole->wrap(\&Math::Cephes::ndtr ,$safeeval,'&ndtr' );
814: $safehole->wrap(\&Math::Cephes::ndtri ,$safeeval,'&ndtri' );
815: $safehole->wrap(\&Math::Cephes::pdtr ,$safeeval,'&pdtr' );
816: $safehole->wrap(\&Math::Cephes::pdtrc ,$safeeval,'&pdtrc' );
817: $safehole->wrap(\&Math::Cephes::pdtri ,$safeeval,'&pdtri' );
818: $safehole->wrap(\&Math::Cephes::stdtr ,$safeeval,'&stdtr' );
819: $safehole->wrap(\&Math::Cephes::stdtri,$safeeval,'&stdtri');
820:
821: $safehole->wrap(\&Math::Cephes::Matrix::mat,$safeeval,'&mat');
822: $safehole->wrap(\&Math::Cephes::Matrix::new,$safeeval,
823: '&Math::Cephes::Matrix::new');
824: $safehole->wrap(\&Math::Cephes::Matrix::coef,$safeeval,
825: '&Math::Cephes::Matrix::coef');
826: $safehole->wrap(\&Math::Cephes::Matrix::clr,$safeeval,
827: '&Math::Cephes::Matrix::clr');
828: $safehole->wrap(\&Math::Cephes::Matrix::add,$safeeval,
829: '&Math::Cephes::Matrix::add');
830: $safehole->wrap(\&Math::Cephes::Matrix::sub,$safeeval,
831: '&Math::Cephes::Matrix::sub');
832: $safehole->wrap(\&Math::Cephes::Matrix::mul,$safeeval,
833: '&Math::Cephes::Matrix::mul');
834: $safehole->wrap(\&Math::Cephes::Matrix::div,$safeeval,
835: '&Math::Cephes::Matrix::div');
836: $safehole->wrap(\&Math::Cephes::Matrix::inv,$safeeval,
837: '&Math::Cephes::Matrix::inv');
838: $safehole->wrap(\&Math::Cephes::Matrix::transp,$safeeval,
839: '&Math::Cephes::Matrix::transp');
840: $safehole->wrap(\&Math::Cephes::Matrix::simq,$safeeval,
841: '&Math::Cephes::Matrix::simq');
842: $safehole->wrap(\&Math::Cephes::Matrix::mat_to_vec,$safeeval,
843: '&Math::Cephes::Matrix::mat_to_vec');
844: $safehole->wrap(\&Math::Cephes::Matrix::vec_to_mat,$safeeval,
845: '&Math::Cephes::Matrix::vec_to_mat');
846: $safehole->wrap(\&Math::Cephes::Matrix::check,$safeeval,
847: '&Math::Cephes::Matrix::check');
848: $safehole->wrap(\&Math::Cephes::Matrix::check,$safeeval,
849: '&Math::Cephes::Matrix::check');
850:
851: # $safehole->wrap(\&Math::Cephes::new_fract,$safeeval,'&new_fract');
852: # $safehole->wrap(\&Math::Cephes::radd,$safeeval,'&radd');
853: # $safehole->wrap(\&Math::Cephes::rsub,$safeeval,'&rsub');
854: # $safehole->wrap(\&Math::Cephes::rmul,$safeeval,'&rmul');
855: # $safehole->wrap(\&Math::Cephes::rdiv,$safeeval,'&rdiv');
856: # $safehole->wrap(\&Math::Cephes::euclid,$safeeval,'&euclid');
857:
858: $safehole->wrap(\&Math::Random::random_beta,$safeeval,'&math_random_beta');
859: $safehole->wrap(\&Math::Random::random_chi_square,$safeeval,'&math_random_chi_square');
860: $safehole->wrap(\&Math::Random::random_exponential,$safeeval,'&math_random_exponential');
861: $safehole->wrap(\&Math::Random::random_f,$safeeval,'&math_random_f');
862: $safehole->wrap(\&Math::Random::random_gamma,$safeeval,'&math_random_gamma');
863: $safehole->wrap(\&Math::Random::random_multivariate_normal,$safeeval,'&math_random_multivariate_normal');
864: $safehole->wrap(\&Math::Random::random_multinomial,$safeeval,'&math_random_multinomial');
865: $safehole->wrap(\&Math::Random::random_noncentral_chi_square,$safeeval,'&math_random_noncentral_chi_square');
866: $safehole->wrap(\&Math::Random::random_noncentral_f,$safeeval,'&math_random_noncentral_f');
867: $safehole->wrap(\&Math::Random::random_normal,$safeeval,'&math_random_normal');
868: $safehole->wrap(\&Math::Random::random_permutation,$safeeval,'&math_random_permutation');
869: $safehole->wrap(\&Math::Random::random_permuted_index,$safeeval,'&math_random_permuted_index');
870: $safehole->wrap(\&Math::Random::random_uniform,$safeeval,'&math_random_uniform');
871: $safehole->wrap(\&Math::Random::random_poisson,$safeeval,'&math_random_poisson');
872: $safehole->wrap(\&Math::Random::random_uniform_integer,$safeeval,'&math_random_uniform_integer');
873: $safehole->wrap(\&Math::Random::random_negative_binomial,$safeeval,'&math_random_negative_binomial');
874: $safehole->wrap(\&Math::Random::random_binomial,$safeeval,'&math_random_binomial');
875: $safehole->wrap(\&Math::Random::random_seed_from_phrase,$safeeval,'&random_seed_from_phrase');
876: $safehole->wrap(\&Math::Random::random_set_seed_from_phrase,$safeeval,'&random_set_seed_from_phrase');
877: $safehole->wrap(\&Math::Random::random_get_seed,$safeeval,'&random_get_seed');
878: $safehole->wrap(\&Math::Random::random_set_seed,$safeeval,'&random_set_seed');
879: $safehole->wrap(\&Apache::loncommon::languages,$safeeval,'&languages');
880: $safehole->wrap(\&Apache::lonxml::error,$safeeval,'&LONCAPA_INTERNAL_ERROR');
881: $safehole->wrap(\&Apache::lonxml::debug,$safeeval,'&LONCAPA_INTERNAL_DEBUG');
882: $safehole->wrap(\&Apache::lonnet::logthis,$safeeval,'&LONCAPA_INTERNAL_LOGTHIS');
883: $safehole->wrap(\&Apache::inputtags::finalizeawards,$safeeval,'&LONCAPA_INTERNAL_FINALIZEAWARDS');
884: $safehole->wrap(\&Apache::caparesponse::get_sigrange,$safeeval,'&LONCAPA_INTERNAL_get_sigrange');
885: $safehole->wrap(\&Apache::functionplotresponse::fpr_val,$safeeval,'&fpr_val');
886: $safehole->wrap(\&Apache::functionplotresponse::fpr_f,$safeeval,'&fpr_f');
887: $safehole->wrap(\&Apache::functionplotresponse::fpr_dfdx,$safeeval,'&fpr_dfdx');
888: $safehole->wrap(\&Apache::functionplotresponse::fpr_d2fdx2,$safeeval,'&fpr_d2fdx2');
889:
890: # use Data::Dumper;
891: # $safehole->wrap(\&Data::Dumper::Dumper,$safeeval,'&LONCAPA_INTERNAL_Dumper');
892: #need to inspect this class of ops
893: # $safeeval->deny(":base_orig");
894: $safeeval->permit("require");
895: $safeinit .= ';$external::target="'.$target.'";';
896: &Apache::run::run($safeinit,$safeeval);
897: &initialize_rndseed($safeeval);
898: }
899:
900: sub clean_safespace {
901: my ($safeeval) = @_;
902: delete_package_recurse($safeeval->{Root});
903: }
904:
905: sub delete_package_recurse {
906: my ($package) = @_;
907: my @subp;
908: {
909: no strict 'refs';
910: while (my ($key,$val) = each(%{*{"$package\::"}})) {
911: if (!defined($val)) { next; }
912: local (*ENTRY) = $val;
913: if (defined *ENTRY{HASH} && $key =~ /::$/ &&
914: $key ne "main::" && $key ne "<none>::")
915: {
916: my ($p) = $package ne "main" ? "$package\::" : "";
917: ($p .= $key) =~ s/::$//;
918: push(@subp,$p);
919: }
920: }
921: }
922: foreach my $p (@subp) {
923: delete_package_recurse($p);
924: }
925: Symbol::delete_package($package);
926: }
927:
928: sub initialize_rndseed {
929: my ($safeeval)=@_;
930: my $rndseed;
931: my ($symb,$courseid,$domain,$name) = &Apache::lonnet::whichuser();
932: $rndseed=&Apache::lonnet::rndseed($symb,$courseid,$domain,$name);
933: my $safeinit = '$external::randomseed="'.$rndseed.'";';
934: &Apache::lonxml::debug("Setting rndseed to $rndseed");
935: &Apache::run::run($safeinit,$safeeval);
936: }
937:
938: sub default_homework_load {
939: my ($safeeval)=@_;
940: &Apache::lonxml::debug('Loading default_homework');
941: my $default=&Apache::lonnet::getfile('/home/httpd/html/res/adm/includes/default_homework.lcpm');
942: if ($default eq -1) {
943: &Apache::lonxml::error("<b>Unable to find <i>default_homework.lcpm</i></b>");
944: } else {
945: &Apache::run::run($default,$safeeval);
946: $Apache::lonxml::default_homework_loaded=1;
947: }
948: }
949:
950: {
951: my $alarm_depth;
952: sub init_alarm {
953: alarm(0);
954: $alarm_depth=0;
955: }
956:
957: sub start_alarm {
958: if ($alarm_depth<1) {
959: my $old=alarm($Apache::lonnet::perlvar{'lonScriptTimeout'});
960: if ($old) {
961: &Apache::lonxml::error("Cancelled an alarm of $old, this shouldn't occur.");
962: }
963: }
964: $alarm_depth++;
965: }
966:
967: sub end_alarm {
968: $alarm_depth--;
969: if ($alarm_depth<1) { alarm(0); }
970: }
971: }
972: my $metamode_was;
973: sub startredirection {
974: if (!$Apache::lonxml::redirection) {
975: $metamode_was=$Apache::lonxml::metamode;
976: }
977: $Apache::lonxml::metamode=0;
978: $Apache::lonxml::redirection++;
979: push (@Apache::lonxml::outputstack, '');
980: }
981:
982: sub endredirection {
983: if (!$Apache::lonxml::redirection) {
984: &Apache::lonxml::error("Endredirection was called before a startredirection, perhaps you have unbalanced tags. Some debugging information:".join ":",caller);
985: return '';
986: }
987: $Apache::lonxml::redirection--;
988: if (!$Apache::lonxml::redirection) {
989: $Apache::lonxml::metamode=$metamode_was;
990: }
991: pop @Apache::lonxml::outputstack;
992: }
993: sub in_redirection {
994: return ($Apache::lonxml::redirection > 0)
995: }
996:
997: sub end_tag {
998: my ($tagstack,$parstack,$token)=@_;
999: pop(@$tagstack);
1000: pop(@$parstack);
1001: &decreasedepth($token);
1002: }
1003:
1004: sub initdepth {
1005: @Apache::lonxml::depthcounter=();
1006: undef($Apache::lonxml::last_depth_count);
1007: }
1008:
1009:
1010: my @timers;
1011: my $lasttime;
1012: # @Apache::lonxml::depthcounter -> count of tags that exist so
1013: # far at each level
1014: # $Apache::lonxml::last_depth_count -> when ascending, need to
1015: # remember the count for the level below the current level (for
1016: # example going from 1_2 -> 1 -> 1_3 need to remember the 2 )
1017:
1018: sub increasedepth {
1019: my ($token) = @_;
1020: push(@Apache::lonxml::depthcounter,$Apache::lonxml::last_depth_count+1);
1021: undef($Apache::lonxml::last_depth_count);
1022: my $time;
1023: if ($Apache::lonxml::debug eq "1") {
1024: push(@timers,[&gettimeofday()]);
1025: $time=&tv_interval($lasttime);
1026: $lasttime=[&gettimeofday()];
1027: }
1028: my $spacing=' 'x($#Apache::lonxml::depthcounter);
1029: $Apache::lonxml::curdepth=join('_',@Apache::lonxml::depthcounter);
1030: # &Apache::lonxml::debug("s$spacing$Apache::lonxml::depth : $Apache::lonxml::olddepth : $Apache::lonxml::curdepth : $token->[1] : $time");
1031: #print "<br />s $Apache::lonxml::depth : $Apache::lonxml::olddepth : $curdepth : $token->[1]\n";
1032: }
1033:
1034: sub decreasedepth {
1035: my ($token) = @_;
1036: if ( $#Apache::lonxml::depthcounter == -1) {
1037: &Apache::lonxml::warning(&mt("Missing tags, unable to properly run file."));
1038: }
1039: $Apache::lonxml::last_depth_count = pop(@Apache::lonxml::depthcounter);
1040:
1041: my ($timer,$time);
1042: if ($Apache::lonxml::debug eq "1") {
1043: $timer=pop(@timers);
1044: $time=&tv_interval($lasttime);
1045: $lasttime=[&gettimeofday()];
1046: }
1047: my $spacing=' 'x($#Apache::lonxml::depthcounter);
1048: $Apache::lonxml::curdepth = join('_',@Apache::lonxml::depthcounter);
1049: # &Apache::lonxml::debug("e$spacing$Apache::lonxml::depth : $Apache::lonxml::olddepth : $Apache::lonxml::curdepth : $token->[1] : $time : ".&tv_interval($timer));
1050: #print "<br />e $Apache::lonxml::depth : $Apache::lonxml::olddepth : $token->[1] : $curdepth\n";
1051: }
1052:
1053: sub get_id {
1054: my ($parstack,$safeeval)=@_;
1055: my $id= &Apache::lonxml::get_param('id',$parstack,$safeeval);
1056: if ($env{'request.state'} eq 'construct' && $id =~ /([._]|[^\w\d\s[:punct:]])/) {
1057: &error(&mt('ID [_1] contains invalid characters. IDs are only allowed to contain letters, numbers, spaces and -','"<tt>'.$id.'</tt>"'));
1058: }
1059: if ($id =~ /^\s*$/) { $id = $Apache::lonxml::curdepth; }
1060: return $id;
1061: }
1062:
1063: sub get_all_text_unbalanced {
1064: #there is a copy of this in lonpublisher.pm
1065: my($tag,$pars)= @_;
1066: my $token;
1067: my $result='';
1068: $tag='<'.$tag.'>';
1069: while ($token = $$pars[-1]->get_token) {
1070: if (($token->[0] eq 'T')||($token->[0] eq 'C')||($token->[0] eq 'D')) {
1071: if ($token->[0] eq 'T' && $token->[2]) {
1072: $result.='<![CDATA['.$token->[1].']]>';
1073: } else {
1074: $result.=$token->[1];
1075: }
1076: } elsif ($token->[0] eq 'PI') {
1077: $result.=$token->[2];
1078: } elsif ($token->[0] eq 'S') {
1079: $result.=$token->[4];
1080: } elsif ($token->[0] eq 'E') {
1081: $result.=$token->[2];
1082: }
1083: if ($result =~ /\Q$tag\E/is) {
1084: ($result,my $redo)=$result =~ /(.*)\Q$tag\E(.*)/is;
1085: #&Apache::lonxml::debug('Got a winner with leftovers ::'.$2);
1086: #&Apache::lonxml::debug('Result is :'.$1);
1087: $redo=$tag.$redo;
1088: &Apache::lonxml::newparser($pars,\$redo);
1089: last;
1090: }
1091: }
1092: return $result
1093:
1094: }
1095:
1096: #########################################################################
1097: # #
1098: # bubble line counter management #
1099: # #
1100: #########################################################################
1101:
1102: =pod
1103:
1104: For bubble grading mode and exam bubble printing mode, the tracking of
1105: the current 'bubble line number' is stored in the %env element
1106: 'form.counter', and is modifed and handled by the following routines.
1107:
1108: The value of it is stored in $Apache:lonxml::counter when live and
1109: stored back to env after done.
1110:
1111: =item &increment_counter($increment);
1112:
1113: Increments the internal counter environment variable a specified amount
1114:
1115: Optional Arguments:
1116: $increment - amount to increment by (defaults to 1)
1117: Also 1 if the value is negative or zero.
1118: $part_response - A concatenation of the part and response id
1119: identifying exactly what is being 'answered'.
1120:
1121:
1122: =cut
1123:
1124: sub increment_counter {
1125: my ($increment, $part_response) = @_;
1126: if ($env{'form.grade_noincrement'}) { return; }
1127: if (!defined($increment) || $increment le 0) {
1128: $increment = 1;
1129: }
1130: $Apache::lonxml::counter += $increment;
1131:
1132: # If the caller supplied the response_id parameter,
1133: # Maintain its counter.. creating if necessary.
1134:
1135: if (defined($part_response)) {
1136: if (!defined($Apache::lonxml::counters_per_part{$part_response})) {
1137: $Apache::lonxml::counters_per_part{$part_response} = 0;
1138: }
1139: $Apache::lonxml::counters_per_part{$part_response} += $increment;
1140: my $new_value = $Apache::lonxml::counters_per_part{$part_response};
1141: }
1142:
1143: $Apache::lonxml::counter_changed=1;
1144: }
1145:
1146: =pod
1147:
1148: =item &init_counter($increment);
1149:
1150: Initialize the internal counter environment variable
1151:
1152: =cut
1153:
1154: sub init_counter {
1155: if ($env{'request.state'} eq 'construct') {
1156: $Apache::lonxml::counter=1;
1157: $Apache::lonxml::counter_changed=1;
1158: } elsif (defined($env{'form.counter'})) {
1159: $Apache::lonxml::counter=$env{'form.counter'};
1160: $Apache::lonxml::counter_changed=0;
1161: } else {
1162: $Apache::lonxml::counter=1;
1163: $Apache::lonxml::counter_changed=1;
1164: }
1165: }
1166:
1167: sub store_counter {
1168: &Apache::lonnet::appenv({'form.counter' => $Apache::lonxml::counter});
1169: $Apache::lonxml::counter_changed=0;
1170: return '';
1171: }
1172:
1173: {
1174: my $state;
1175: sub clear_problem_counter {
1176: undef($state);
1177: &Apache::lonnet::delenv('form.counter');
1178: &Apache::lonxml::init_counter();
1179: &Apache::lonxml::store_counter();
1180: }
1181:
1182: sub remember_problem_counter {
1183: &Apache::lonnet::transfer_profile_to_env(undef,undef,1);
1184: $state = $env{'form.counter'};
1185: }
1186:
1187: sub restore_problem_counter {
1188: if (defined($state)) {
1189: &Apache::lonnet::appenv({'form.counter' => $state});
1190: }
1191: }
1192: sub get_problem_counter {
1193: if ($Apache::lonxml::counter_changed) { &store_counter() }
1194: &Apache::lonnet::transfer_profile_to_env(undef,undef,1);
1195: return $env{'form.counter'};
1196: }
1197: }
1198:
1199: =pod
1200:
1201: =item bubble_lines_for_part(part_response)
1202:
1203: Returns the number of lines required to get a response for
1204: $part_response (this is just $Apache::lonxml::counters_per_part{$part_response}
1205:
1206: =cut
1207:
1208: sub bubble_lines_for_part {
1209: my ($part_response) = @_;
1210:
1211: if (!defined($Apache::lonxml::counters_per_part{$part_response})) {
1212: return 0;
1213: } else {
1214: return $Apache::lonxml::counters_per_part{$part_response};
1215: }
1216: }
1217:
1218: =pod
1219:
1220: =item clear_bubble_lines_for_part
1221:
1222: Clears the hash of bubble lines per part. If a caller
1223: needs to analyze several resources this should be called between
1224: resources to reset the hash for each problem being analyzed.
1225:
1226: =cut
1227:
1228: sub clear_bubble_lines_for_part {
1229: undef(%Apache::lonxml::counters_per_part);
1230: }
1231:
1232: =pod
1233:
1234: =item set_bubble_lines(part_response, value)
1235:
1236: If there is a problem part, that for whatever reason
1237: requires bubble lines that are not
1238: the same as the counter increment, it can call this sub during
1239: analysis to set its hash value explicitly.
1240:
1241: =cut
1242:
1243: sub set_bubble_lines {
1244: my ($part_response, $value) = @_;
1245:
1246: $Apache::lonxml::counters_per_part{$part_response} = $value;
1247: }
1248:
1249: =pod
1250:
1251: =item get_bubble_line_hash
1252:
1253: Returns the current bubble line hash. This is assumed to
1254: be small so we return a copy
1255:
1256:
1257: =cut
1258:
1259: sub get_bubble_line_hash {
1260: return %Apache::lonxml::counters_per_part;
1261: }
1262:
1263:
1264: #--------------------------------------------------
1265:
1266: sub get_all_text {
1267: my($tag,$pars,$style)= @_;
1268: my $gotfullstack=1;
1269: if (ref($pars) ne 'ARRAY') {
1270: $gotfullstack=0;
1271: $pars=[$pars];
1272: }
1273: if (ref($style) ne 'HASH') {
1274: $style={};
1275: }
1276: my $depth=0;
1277: my $token;
1278: my $result='';
1279: if ( $tag =~ m:^/: ) {
1280: my $tag=substr($tag,1);
1281: #&Apache::lonxml::debug("have:$tag:");
1282: my $top_empty=0;
1283: while (($depth >=0) && ($#$pars > -1) && (!$top_empty)) {
1284: while (($depth >=0) && ($token = $$pars[-1]->get_token)) {
1285: #&Apache::lonxml::debug("e token:$token->[0]:$depth:$token->[1]:".$#$pars.":".$#Apache::lonxml::pwd);
1286: if (($token->[0] eq 'T')||($token->[0] eq 'C')||($token->[0] eq 'D')) {
1287: if ($token->[2]) {
1288: $result.='<![CDATA['.$token->[1].']]>';
1289: } else {
1290: $result.=$token->[1];
1291: }
1292: } elsif ($token->[0] eq 'PI') {
1293: $result.=$token->[2];
1294: } elsif ($token->[0] eq 'S') {
1295: if ($token->[1] =~ /^\Q$tag\E$/i) { $depth++; }
1296: if ($token->[1] =~ /^LONCAPA_INTERNAL_TURN_STYLE_ON$/) { $Apache::lonxml::usestyle=1; }
1297: if ($token->[1] =~ /^LONCAPA_INTERNAL_TURN_STYLE_OFF$/) { $Apache::lonxml::usestyle=0; }
1298: $result.=$token->[4];
1299: } elsif ($token->[0] eq 'E') {
1300: if ( $token->[1] =~ /^\Q$tag\E$/i) { $depth--; }
1301: #skip sending back the last end tag
1302: if ($depth == 0 && exists($$style{'/'.$token->[1]}) && $Apache::lonxml::usestyle) {
1303: my $string=
1304: '<LONCAPA_INTERNAL_TURN_STYLE_OFF end="yes" />'.
1305: $$style{'/'.$token->[1]}.
1306: $token->[2].
1307: '<LONCAPA_INTERNAL_TURN_STYLE_ON />';
1308: &Apache::lonxml::newparser($pars,\$string);
1309: #&Apache::lonxml::debug("reParsing $string");
1310: next;
1311: }
1312: if ($depth > -1) {
1313: $result.=$token->[2];
1314: } else {
1315: $$pars[-1]->unget_token($token);
1316: }
1317: }
1318: }
1319: if (($depth >=0) && ($#$pars == 0) ) { $top_empty=1; }
1320: if (($depth >=0) && ($#$pars > 0) ) {
1321: pop(@$pars);
1322: pop(@Apache::lonxml::pwd);
1323: }
1324: }
1325: if ($top_empty && $depth >= 0) {
1326: #never found the end tag ran out of text, throw error send back blank
1327: &error('Never found end tag for <'.$tag.
1328: '> current string <pre>'.
1329: &HTML::Entities::encode($result,'<>&"').
1330: '</pre>');
1331: if ($gotfullstack) {
1332: my $newstring='</'.$tag.'>'.$result;
1333: &Apache::lonxml::newparser($pars,\$newstring);
1334: }
1335: $result='';
1336: }
1337: } else {
1338: while ($#$pars > -1) {
1339: while ($token = $$pars[-1]->get_token) {
1340: #&Apache::lonxml::debug("s token:$token->[0]:$depth:$token->[1]");
1341: if (($token->[0] eq 'T')||($token->[0] eq 'C')||
1342: ($token->[0] eq 'D')) {
1343: if ($token->[2]) {
1344: $result.='<![CDATA['.$token->[1].']]>';
1345: } else {
1346: $result.=$token->[1];
1347: }
1348: } elsif ($token->[0] eq 'PI') {
1349: $result.=$token->[2];
1350: } elsif ($token->[0] eq 'S') {
1351: if ( $token->[1] =~ /^\Q$tag\E$/i) {
1352: $$pars[-1]->unget_token($token); last;
1353: } else {
1354: $result.=$token->[4];
1355: }
1356: if ($token->[1] =~ /^LONCAPA_INTERNAL_TURN_STYLE_ON$/) { $Apache::lonxml::usestyle=1; }
1357: if ($token->[1] =~ /^LONCAPA_INTERNAL_TURN_STYLE_OFF$/) { $Apache::lonxml::usestyle=0; }
1358: } elsif ($token->[0] eq 'E') {
1359: $result.=$token->[2];
1360: }
1361: }
1362: if (($#$pars > 0) ) {
1363: pop(@$pars);
1364: pop(@Apache::lonxml::pwd);
1365: } else { last; }
1366: }
1367: }
1368: #&Apache::lonxml::debug("Exit:$result:");
1369: return $result
1370: }
1371:
1372: sub newparser {
1373: my ($parser,$contentref,$dir) = @_;
1374: push (@$parser,HTML::LCParser->new($contentref));
1375: $$parser[-1]->xml_mode(1);
1376: $$parser[-1]->marked_sections(1);
1377: if ( $dir eq '' ) {
1378: push (@Apache::lonxml::pwd, $Apache::lonxml::pwd[$#Apache::lonxml::pwd]);
1379: } else {
1380: push (@Apache::lonxml::pwd, $dir);
1381: }
1382: }
1383:
1384: sub parstring {
1385: my ($token) = @_;
1386: my (@vars,@values);
1387: foreach my $attr (@{$token->[3]}) {
1388: if ($attr!~/\W/) {
1389: my $val=$token->[2]->{$attr};
1390: $val =~ s/([\%\@\\\"\'])/\\$1/g;
1391: $val =~ s/(\$[^\{a-zA-Z_])/\\$1/g;
1392: $val =~ s/(\$)$/\\$1/;
1393: #if ($val =~ m/^[\%\@]/) { $val="\\".$val; }
1394: push(@vars,"\$$attr");
1395: push(@values,"\"$val\"");
1396: }
1397: }
1398: my $var_init =
1399: (@vars) ? 'my ('.join(',',@vars).') = ('.join(',',@values).');'
1400: : '';
1401: return $var_init;
1402: }
1403:
1404: sub extlink {
1405: my ($res,$exact)=@_;
1406: if (!$exact) {
1407: $res=&Apache::lonnet::hreflocation($Apache::lonxml::pwd[-1],$res);
1408: }
1409: push(@Apache::lonxml::extlinks,$res)
1410: }
1411:
1412: sub writeallows {
1413: unless ($#extlinks>=0) { return; }
1414: my $thisurl = &Apache::lonnet::clutter(shift);
1415: if ($env{'httpref.'.$thisurl}) {
1416: $thisurl=$env{'httpref.'.$thisurl};
1417: }
1418: my $thisdir=$thisurl;
1419: $thisdir=~s/\/[^\/]+$//;
1420: my %httpref=();
1421: foreach (@extlinks) {
1422: $httpref{'httpref.'.
1423: &Apache::lonnet::hreflocation($thisdir,&unescape($_))}=$thisurl;
1424: }
1425: @extlinks=();
1426: &Apache::lonnet::appenv(\%httpref);
1427: }
1428:
1429: sub register_ssi {
1430: my ($url,%form)=@_;
1431: push (@Apache::lonxml::ssi_info,{'url'=>$url,'form'=>\%form});
1432: return '';
1433: }
1434:
1435: sub do_registered_ssi {
1436: foreach my $info (@Apache::lonxml::ssi_info) {
1437: my %form=%{ $info->{'form'}};
1438: my $url=$info->{'url'};
1439: &Apache::lonnet::ssi($url,%form);
1440: }
1441: }
1442:
1443: sub add_script_result {
1444: my ($display) = @_;
1445: push(@script_var_displays, $display);
1446: }
1447:
1448: #
1449: # Afterburner handles anchors, highlights and links
1450: #
1451: sub afterburn {
1452: my $result=shift;
1453: &Apache::loncommon::get_unprocessed_cgi($ENV{'QUERY_STRING'},
1454: ['highlight','anchor','link']);
1455: if ($env{'form.highlight'}) {
1456: foreach (split(/\,/,$env{'form.highlight'})) {
1457: my $anchorname=$_;
1458: my $matchthis=$anchorname;
1459: $matchthis=~s/\_+/\\s\+/g;
1460: $result=~s/(\Q$matchthis\E)/\<font color=\"red\"\>$1\<\/font\>/gs;
1461: }
1462: }
1463: if ($env{'form.link'}) {
1464: foreach (split(/\,/,$env{'form.link'})) {
1465: my ($anchorname,$linkurl)=split(/\>/,$_);
1466: my $matchthis=$anchorname;
1467: $matchthis=~s/\_+/\\s\+/g;
1468: $result=~s/(\Q$matchthis\E)/\<a href=\"$linkurl\"\>$1\<\/a\>/gs;
1469: }
1470: }
1471: if ($env{'form.anchor'}) {
1472: my $anchorname=$env{'form.anchor'};
1473: my $matchthis=$anchorname;
1474: $matchthis=~s/\_+/\\s\+/g;
1475: $result=~s/(\Q$matchthis\E)/\<a name=\"$anchorname\"\>$1\<\/a\>/s;
1476: $result.=(<<"ENDSCRIPT");
1477: <script type="text/javascript">
1478: document.location.hash='$anchorname';
1479: </script>
1480: ENDSCRIPT
1481: }
1482: return $result;
1483: }
1484:
1485: sub storefile {
1486: my ($file,$contents)=@_;
1487: &Apache::lonnet::correct_line_ends(\$contents);
1488: if (my $fh=Apache::File->new('>'.$file)) {
1489: print $fh $contents;
1490: $fh->close();
1491: return 1;
1492: } else {
1493: &warning(&mt('Unable to save file [_1]','<tt>'.$file.'</tt>'));
1494: return 0;
1495: }
1496: }
1497:
1498: sub createnewhtml {
1499: my $title=&mt('Title of document goes here');
1500: my $body=&mt('Body of document goes here');
1501: my $filecontents=(<<SIMPLECONTENT);
1502: <html>
1503: <head>
1504: <title>$title</title>
1505: </head>
1506: <body bgcolor="#FFFFFF">
1507: $body
1508: </body>
1509: </html>
1510: SIMPLECONTENT
1511: return $filecontents;
1512: }
1513:
1514: sub createnewsty {
1515: my $filecontents=(<<SIMPLECONTENT);
1516: <definetag name="">
1517: <render>
1518: <web></web>
1519: <tex></tex>
1520: </render>
1521: </definetag>
1522: SIMPLECONTENT
1523: return $filecontents;
1524: }
1525:
1526: sub createnewjs {
1527: my $filecontents=(<<SIMPLECONTENT);
1528: <script type="text/javascript" language="Javascript">
1529:
1530: </script>
1531: SIMPLECONTENT
1532: return $filecontents;
1533: }
1534:
1535: sub verify_html {
1536: my ($filecontents)=@_;
1537: my ($is_html,$is_xml);
1538: if ($filecontents =~/(?:\<|\<\;)\?xml[^\<]*\?(?:\>|\>\;)/is) {
1539: $is_xml = 1;
1540: } elsif ($filecontents =~/(?:\<|\<\;)html(?:\s+[^\<]+|\s*)(?:\>|\>\;)/is) {
1541: $is_html = 1;
1542: }
1543: unless ($is_xml || $is_html) {
1544: return &mt('File does not have [_1] or [_2] starting tag','<html>','<?xml ?>');
1545: }
1546: if ($is_html) {
1547: if ($filecontents!~/(?:\<|\<\;)\/html(?:\>|\>\;)/is) {
1548: return &mt('File does not have [_1] ending tag','<html>');
1549: }
1550: if ($filecontents!~/(?:\<|\<\;)(?:body|frameset)[^\<]*(?:\>|\>\;)/is) {
1551: return &mt('File does not have [_1] or [_2] starting tag','<body>','<frameset>');
1552: }
1553: if ($filecontents!~/(?:\<|\<\;)\/(?:body|frameset)[^\<]*(?:\>|\>\;)/is) {
1554: return &mt('File does not have [_1] or [_2] ending tag','<body>','<frameset>');
1555: }
1556: }
1557: return '';
1558: }
1559:
1560: sub renderingoptions {
1561: my %langchoices=('' => '');
1562: foreach (&Apache::loncommon::languageids()) {
1563: if (&Apache::loncommon::supportedlanguagecode($_)) {
1564: $langchoices{&Apache::loncommon::supportedlanguagecode($_)}
1565: = &Apache::loncommon::plainlanguagedescription($_);
1566: }
1567: }
1568: my $output;
1569: unless ($env{'form.forceedit'}) {
1570: $output .=
1571: '<span class="LC_nobreak">'.
1572: &mt('Language:').' '.
1573: &Apache::loncommon::select_form(
1574: $env{'form.languages'},
1575: 'languages',
1576: {&Apache::lonlocal::texthash(%langchoices)}).
1577: '</span>';
1578: }
1579: $output .=
1580: ' <span class="LC_nobreak">'.
1581: &mt('Math Rendering:').' '.
1582: &Apache::loncommon::select_form(
1583: $env{'form.texengine'},
1584: 'texengine',
1585: {&Apache::lonlocal::texthash
1586: ('' => '',
1587: 'tth' => 'tth (TeX to HTML)',
1588: 'jsMath' => 'jsMath',
1589: 'mimetex' => 'mimetex (Convert to Images)')}).
1590: '</span>';
1591: return $output;
1592: }
1593:
1594: sub inserteditinfo {
1595: my ($filecontents, $filetype, $filename)=@_;
1596: $filecontents = &HTML::Entities::encode($filecontents,'<>&"');
1597: my $xml_help = '';
1598: my $initialize='';
1599: my $textarea_id = 'filecont';
1600: my $dragmath_button;
1601: my ($add_to_onload, $add_to_onresize);
1602: $initialize=&Apache::lonhtmlcommon::spellheader();
1603: if (($filetype eq 'html') && (&Apache::lonhtmlcommon::htmlareabrowser())) {
1604: my $lang = &Apache::lonhtmlcommon::htmlarea_lang();
1605: my %textarea_args = (
1606: fullpage => 'true',
1607: dragmath => 'math',
1608: );
1609: $initialize .= &Apache::lonhtmlcommon::htmlareaselectactive(\%textarea_args);
1610: }
1611: $initialize .= (<<FULLPAGE);
1612: <script type="text/javascript">
1613: // <![CDATA[
1614: function initDocument() {
1615: resize_textarea('$textarea_id','LC_aftertextarea');
1616: }
1617: // ]]>
1618: </script>
1619: FULLPAGE
1620: if ($filetype eq 'html') {
1621: $dragmath_button = '<span id="math_filecont">'.&Apache::lonhtmlcommon::dragmath_button('filecont',1).'</span>';
1622: $initialize .= "\n".&Apache::lonhtmlcommon::dragmath_js('EditMathPopup');
1623: }
1624: $add_to_onload = 'initDocument();';
1625: $add_to_onresize = "resize_textarea('$textarea_id','LC_aftertextarea');";
1626:
1627: if ($filetype eq 'html') {
1628: $xml_help=&Apache::loncommon::helpLatexCheatsheet();
1629: }
1630:
1631: my $titledisplay=&display_title();
1632: my $textareaclass;
1633: my %lt=&Apache::lonlocal::texthash('st' => 'Save and Edit',
1634: 'vi' => 'Save and View',
1635: 'dv' => 'Discard Edits and View',
1636: 'un' => 'undo',
1637: 'ed' => 'Edit');
1638: my $spelllink = &Apache::lonhtmlcommon::spelllink('xmledit','filecont');
1639: my $textarea_events = &Apache::edit::element_change_detection();
1640: my $form_events = &Apache::edit::form_change_detection();
1641: my $htmlerror;
1642: if ($filetype eq 'html') {
1643: $htmlerror=&verify_html($filecontents);
1644: if ($htmlerror) {
1645: $htmlerror='<span class="LC_error">'.$htmlerror.'</span>';
1646: }
1647: if (&Apache::lonhtmlcommon::htmlareabrowser()) {
1648: $textareaclass = 'class="LC_richDefaultOff"';
1649: }
1650: }
1651: my $editfooter=(<<ENDFOOTER);
1652: $initialize
1653: <a name="editsection" />
1654: <form $form_events method="post" name="xmledit">
1655: <div class="LC_edit_problem_editxml_header">
1656: <table class="LC_edit_problem_header_title"><tr><td>
1657: $filename
1658: </td><td align="right">
1659: $xml_help
1660: </td></tr>
1661: </table>
1662: <div class="LC_edit_problem_discards">
1663: <input type="submit" name="discardview" accesskey="d" value="$lt{'dv'}" />
1664: <input type="submit" name="Undo" accesskey="u" value="$lt{'un'}" />
1665: $htmlerror $dragmath_button
1666: </div>
1667: <div class="LC_edit_problem_saves">
1668: <input type="submit" name="savethisfile" accesskey="s" value="$lt{'st'}" />
1669: <input type="submit" name="viewmode" accesskey="v" value="$lt{'vi'}" />
1670: </div>
1671: </div>
1672: <textarea $textarea_events style="width:100%" cols="80" rows="44" name="filecont" id="filecont" $textareaclass>$filecontents</textarea><br />$spelllink
1673: <div id="LC_aftertextarea">
1674: <br />
1675: $titledisplay
1676: </div>
1677: </form>
1678: </body>
1679: ENDFOOTER
1680: return ($editfooter,$add_to_onload,$add_to_onresize);;
1681: }
1682:
1683: sub get_target {
1684: my $viewgrades=&Apache::lonnet::allowed('vgr',$env{'request.course.id'});
1685: if ( $env{'request.state'} eq 'published') {
1686: if ( defined($env{'form.grade_target'})
1687: && ($viewgrades == 'F' )) {
1688: return ($env{'form.grade_target'});
1689: } elsif (defined($env{'form.grade_target'})) {
1690: if (($env{'form.grade_target'} eq 'web') ||
1691: ($env{'form.grade_target'} eq 'tex') ) {
1692: return $env{'form.grade_target'}
1693: } else {
1694: return 'web';
1695: }
1696: } else {
1697: return 'web';
1698: }
1699: } elsif ($env{'request.state'} eq 'construct') {
1700: if ( defined($env{'form.grade_target'})) {
1701: return ($env{'form.grade_target'});
1702: } else {
1703: return 'web';
1704: }
1705: } else {
1706: return 'web';
1707: }
1708: }
1709:
1710: sub handler {
1711: my $request=shift;
1712:
1713: my $target=&get_target();
1714: $Apache::lonxml::debug=$env{'user.debug'};
1715:
1716: &Apache::loncommon::content_type($request,'text/html');
1717: &Apache::loncommon::no_cache($request);
1718: if ($env{'request.state'} eq 'published') {
1719: $request->set_last_modified(&Apache::lonnet::metadata($request->uri,
1720: 'lastrevisiondate'));
1721: }
1722: # Embedded Flash movies from Camtasia served from https will not display in IE
1723: # if XML config file has expired from cache.
1724: if ($ENV{'SERVER_PORT'} == 443) {
1725: if ($request->uri =~ /\.xml$/) {
1726: my ($httpbrowser,$clientbrowser) =
1727: &Apache::loncommon::decode_user_agent($request);
1728: if ($clientbrowser =~ /^explorer$/i) {
1729: delete $request->headers_out->{'Cache-control'};
1730: delete $request->headers_out->{'Pragma'};
1731: my $expiration = time + 60;
1732: my $date=strftime("%a, %d %b %Y %H:%M:%S GMT",gmtime($expiration));
1733: $request->headers_out->set("Expires" => $date);
1734: }
1735: }
1736: }
1737: $request->send_http_header;
1738:
1739: return OK if $request->header_only;
1740:
1741:
1742: my $file=&Apache::lonnet::filelocation("",$request->uri);
1743: my ($filetype,$breadcrumbtext);
1744: if ($file =~ /\.(sty|css|js|txt|tex)$/) {
1745: $filetype=$1;
1746: } else {
1747: $filetype='html';
1748: }
1749: if ($filetype eq 'sty') {
1750: $breadcrumbtext = 'Style File Editor';
1751: } elsif ($filetype eq 'js') {
1752: $breadcrumbtext = 'Javascript Editor';
1753: } elsif ($filetype eq 'css') {
1754: $breadcrumbtext = 'CSS Editor';
1755: } elsif ($filetype eq 'txt') {
1756: $breadcrumbtext = 'Text Editor';
1757: } elsif ($filetype eq 'tex') {
1758: $breadcrumbtext = 'TeX Editor';
1759: } else {
1760: $breadcrumbtext = 'HTML Editor';
1761: }
1762:
1763: #
1764: # Edit action? Save file.
1765: #
1766: if (!($env{'request.state'} eq 'published')) {
1767: if ($env{'form.savethisfile'} || $env{'form.viewmode'} || $env{'form.Undo'}) {
1768: my $html_file=&Apache::lonnet::getfile($file);
1769: my $error = &Apache::lonhomework::handle_save_or_undo($request, \$html_file, \$env{'form.filecont'});
1770: if ($env{'form.savethisfile'}) {
1771: $env{'form.editmode'}='Edit'; #force edit mode
1772: }
1773: }
1774: }
1775: my %mystyle;
1776: my $result = '';
1777: my $filecontents=&Apache::lonnet::getfile($file);
1778: if ($filecontents eq -1) {
1779: my $start_page=&Apache::loncommon::start_page('File Error');
1780: my $end_page=&Apache::loncommon::end_page();
1781: my $errormsg='<p class="LC_error">'
1782: .&mt('File not found: [_1]'
1783: ,'<span class="LC_filename">'.$file.'</span>')
1784: .'</p>';
1785: $result=(<<ENDNOTFOUND);
1786: $start_page
1787: $errormsg
1788: $end_page
1789: ENDNOTFOUND
1790: $filecontents='';
1791: if ($env{'request.state'} ne 'published') {
1792: if ($filetype eq 'sty') {
1793: $filecontents=&createnewsty();
1794: } elsif ($filetype eq 'js') {
1795: $filecontents=&createnewjs();
1796: } elsif ($filetype ne 'css' && $filetype ne 'txt' && $filetype ne 'tex') {
1797: $filecontents=&createnewhtml();
1798: }
1799: $env{'form.editmode'}='Edit'; #force edit mode
1800: }
1801: } else {
1802: unless ($env{'request.state'} eq 'published') {
1803: if ($filecontents=~/BEGIN LON-CAPA Internal/) {
1804: &Apache::lonxml::error(&mt('This file appears to be a rendering of a LON-CAPA resource. If this is correct, this resource will act very oddly and incorrectly.'));
1805: }
1806: #
1807: # we are in construction space, see if edit mode forced
1808: &Apache::loncommon::get_unprocessed_cgi($ENV{'QUERY_STRING'},
1809: ['editmode']);
1810: }
1811: if (!$env{'form.editmode'} || $env{'form.viewmode'} || $env{'form.discardview'}) {
1812: if ($filetype eq 'html' || $filetype eq 'sty') {
1813: &Apache::structuretags::reset_problem_globals();
1814: $result = &Apache::lonxml::xmlparse($request,$target,
1815: $filecontents,'',%mystyle);
1816: # .html files may contain <problem> or <Task> need to clean
1817: # up if it did
1818: &Apache::structuretags::reset_problem_globals();
1819: &Apache::lonhomework::finished_parsing();
1820: } elsif ($filetype eq 'tex') {
1821: $result = &Apache::lontexconvert::converted(\$filecontents,
1822: $env{'form.texengine'});
1823: if ($env{'form.return_only_error_and_warning_counts'}) {
1824: $result = "$errorcount:$warningcount";
1825: }
1826: } else {
1827: $result = $filecontents;
1828: }
1829: &Apache::loncommon::get_unprocessed_cgi($ENV{'QUERY_STRING'},
1830: ['rawmode']);
1831: if ($env{'form.rawmode'}) { $result = $filecontents; }
1832: if (($filetype ne 'html') &&
1833: (!$env{'form.return_only_error_and_warning_counts'})) {
1834: my $nochgview = 1;
1835: my $controls = '';
1836: if ($env{'request.state'} eq 'construct') {
1837: $controls = &Apache::loncommon::head_subbox(
1838: &Apache::loncommon::CSTR_pageheader()
1839: .&Apache::londefdef::edit_controls($nochgview));
1840: }
1841: if ($filetype ne 'sty' && $filetype ne 'tex') {
1842: $result =~ s/</</g;
1843: $result =~ s/>/>/g;
1844: $result = '<table class="LC_sty_begin">'.
1845: '<tr><td><b><pre>'.$result.
1846: '</pre></b></td></tr></table>';
1847: }
1848: if ($env{'environment.remote'} eq 'off') {
1849: my $brcrum;
1850: if ($env{'request.state'} eq 'construct') {
1851: $brcrum = [{'href' => &Apache::loncommon::authorspace(),
1852: 'text' => 'Construction Space'},
1853: {'href' => '',
1854: 'text' => $breadcrumbtext}];
1855: } else {
1856: $brcrum = ''; # FIXME: Where are we?
1857: }
1858: my %options = ('bread_crumbs' => $brcrum,
1859: 'bgcolor' => '#FFFFFF');
1860: $result =
1861: &Apache::loncommon::start_page(undef,undef,\%options)
1862: .$controls
1863: .$result
1864: .&Apache::loncommon::end_page();
1865: } else {
1866: $result = $controls.$result;
1867: }
1868: }
1869: }
1870: }
1871:
1872: #
1873: # Edit action? Insert editing commands
1874: #
1875: unless ($env{'request.state'} eq 'published') {
1876: if ($env{'form.editmode'} && (!($env{'form.viewmode'})) && (!($env{'form.discardview'})))
1877: {
1878: my $displayfile=$request->uri;
1879: $displayfile=~s/^\/[^\/]*//;
1880:
1881: my ($edit_info, $add_to_onload, $add_to_onresize)=
1882: &inserteditinfo($filecontents,$filetype,$displayfile);
1883:
1884: my %options =
1885: ('add_entries' =>
1886: {'onresize' => $add_to_onresize,
1887: 'onload' => $add_to_onload, });
1888: my $header;
1889: if ($env{'request.state'} eq 'construct') {
1890: $options{'bread_crumbs'} = [{
1891: 'href' => &Apache::loncommon::authorspace(),
1892: 'text' => 'Construction Space'},
1893: {'href' => '',
1894: 'text' => $breadcrumbtext}];
1895: $header = &Apache::loncommon::head_subbox(
1896: &Apache::loncommon::CSTR_pageheader());
1897: }
1898: if ($env{'environment.remote'} ne 'off') {
1899: $options{'bgcolor'} = '#FFFFFF';
1900: $options{'only_body'} = 1;
1901: }
1902: my $js =
1903: &Apache::edit::js_change_detection().
1904: &Apache::loncommon::resize_textarea_js();
1905: my $start_page = &Apache::loncommon::start_page(undef,$js,
1906: \%options);
1907: $result = $start_page
1908: .$header
1909: .&Apache::lonxml::message_location()
1910: .$edit_info
1911: .&Apache::loncommon::end_page();
1912: }
1913: }
1914: if ($filetype eq 'html') { &writeallows($request->uri); }
1915:
1916: &Apache::lonxml::add_messages(\$result);
1917: $request->print($result);
1918:
1919: return OK;
1920: }
1921:
1922: sub display_title {
1923: my $result;
1924: if ($env{'request.state'} eq 'construct') {
1925: my $title=&Apache::lonnet::gettitle();
1926: if (!defined($title) || $title eq '') {
1927: $title = $env{'request.filename'};
1928: $title = substr($title, rindex($title, '/') + 1);
1929: }
1930: $result = "<script type='text/javascript'>top.document.title = '$title - LON-CAPA "
1931: .&mt('Construction Space')."';</script>";
1932: }
1933: return $result;
1934: }
1935:
1936: sub debug {
1937: if ($Apache::lonxml::debug eq "1") {
1938: $|=1;
1939: my $request=$Apache::lonxml::request;
1940: if (!$request) {
1941: eval { $request=Apache->request; };
1942: }
1943: if (!$request) {
1944: eval { $request=Apache2::RequestUtil->request; };
1945: }
1946: $request->print('<font size="-2"><pre>DEBUG:'.&HTML::Entities::encode($_[0],'<>&"')."</pre></font>\n");
1947: #&Apache::lonnet::logthis($_[0]);
1948: }
1949: }
1950:
1951: sub show_error_warn_msg {
1952: if ($env{'request.filename'} eq '/home/httpd/html/res/lib/templates/simpleproblem.problem' &&
1953: &Apache::lonnet::allowed('mdc',$env{'request.course.id'})) {
1954: return 1;
1955: }
1956: return (($Apache::lonxml::debug eq 1) ||
1957: ($env{'request.state'} eq 'construct') ||
1958: ($Apache::lonhomework::browse eq 'F'
1959: &&
1960: $env{'form.show_errors'} eq 'on'));
1961: }
1962:
1963: sub error {
1964: my @errors = @_;
1965:
1966: $errorcount++;
1967:
1968: $Apache::lonxml::internal_error=1;
1969:
1970: if (defined($Apache::inputtags::part)) {
1971: if ( @Apache::inputtags::response ) {
1972: push(@errors,
1973: &mt("This error occurred while processing response [_1] in part [_2]",
1974: $Apache::inputtags::response[-1],
1975: $Apache::inputtags::part));
1976: } else {
1977: push(@errors,
1978: &mt("This error occurred while processing part [_1]",
1979: $Apache::inputtags::part));
1980: }
1981: }
1982:
1983: if ( &show_error_warn_msg() ) {
1984: # If printing in construction space, put the error inside <pre></pre>
1985: push(@Apache::lonxml::error_messages,
1986: $Apache::lonxml::warnings_error_header
1987: .'<div class="LC_error">'
1988: .'<b>'.&mt('ERROR:').' </b>'.join("<br />\n",@errors)
1989: ."</div>\n");
1990: $Apache::lonxml::warnings_error_header='';
1991: } else {
1992: my $errormsg;
1993: my ($symb)=&Apache::lonnet::symbread();
1994: if ( !$symb ) {
1995: #public or browsers
1996: $errormsg=&mt("An error occurred while processing this resource. The author has been notified.");
1997: }
1998: my $host=$Apache::lonnet::perlvar{'lonHostID'};
1999: push(@errors,
2000: &mt("The error occurred on host [_1]",
2001: "<tt>$host</tt>"));
2002:
2003: my $msg = join('<br />', @errors);
2004:
2005: #notify author
2006: &Apache::lonmsg::author_res_msg($env{'request.filename'},$msg);
2007: #notify course
2008: if ( $symb && $env{'request.course.id'} ) {
2009: my $cnum=$env{'course.'.$env{'request.course.id'}.'.num'};
2010: my $cdom=$env{'course.'.$env{'request.course.id'}.'.domain'};
2011: my (undef,%users)=&Apache::lonmsg::decide_receiver(undef,0,1,1,1);
2012: my $declutter=&Apache::lonnet::declutter($env{'request.filename'});
2013: my $baseurl = &Apache::lonnet::clutter($declutter);
2014: my @userlist;
2015: foreach (keys %users) {
2016: my ($user,$domain) = split(/:/, $_);
2017: push(@userlist,"$user\@$domain");
2018: my $key=$declutter.'_'.$user.'_'.$domain;
2019: my %lastnotified=&Apache::lonnet::get('nohist_xmlerrornotifications',
2020: [$key],
2021: $cdom,$cnum);
2022: my $now=time;
2023: if ($now-$lastnotified{$key}>86400) {
2024: my $title = &Apache::lonnet::gettitle($symb);
2025: my $sentmessage;
2026: &Apache::lonmsg::user_normal_msg($user,$domain,
2027: "Error [$title]",$msg,'',$baseurl,'','',
2028: \$sentmessage,$symb,$title,1);
2029: &Apache::lonnet::put('nohist_xmlerrornotifications',
2030: {$key => $now},
2031: $cdom,$cnum);
2032: }
2033: }
2034: if ($env{'request.role.adv'}) {
2035: $errormsg=&mt("An error occurred while processing this resource. The course personnel ([_1]) and the author have been notified.",join(', ',@userlist));
2036: } else {
2037: $errormsg=&mt("An error occurred while processing this resource. The instructor has been notified.");
2038: }
2039: }
2040: push(@Apache::lonxml::error_messages,"<b>$errormsg</b> <br />");
2041: }
2042: }
2043:
2044: sub warning {
2045: $warningcount++;
2046:
2047: if ($env{'form.grade_target'} ne 'tex') {
2048: if ( &show_error_warn_msg() ) {
2049: push(@Apache::lonxml::warning_messages,
2050: $Apache::lonxml::warnings_error_header
2051: .'<div class="LC_warning">'
2052: .&mt('[_1]W[_2]ARNING','<b>','</b>')."<b>:</b> ".join('<br />',@_)
2053: ."</div>\n"
2054: );
2055: $Apache::lonxml::warnings_error_header='';
2056: }
2057: }
2058: }
2059:
2060: sub info {
2061: if ($env{'form.grade_target'} ne 'tex'
2062: && $env{'request.state'} eq 'construct') {
2063: push(@Apache::lonxml::info_messages,join('<br />',@_)."<br />\n");
2064: }
2065: }
2066:
2067: sub message_location {
2068: return '__LONCAPA_INTERNAL_MESSAGE_LOCATION__';
2069: }
2070:
2071: sub add_messages {
2072: my ($msg)=@_;
2073: my $result=join(' ',
2074: @Apache::lonxml::info_messages,
2075: @Apache::lonxml::error_messages,
2076: @Apache::lonxml::warning_messages);
2077: undef(@Apache::lonxml::info_messages);
2078: undef(@Apache::lonxml::error_messages);
2079: undef(@Apache::lonxml::warning_messages);
2080: $$msg=~s/__LONCAPA_INTERNAL_MESSAGE_LOCATION__/$result/;
2081: $$msg=~s/__LONCAPA_INTERNAL_MESSAGE_LOCATION__//g;
2082: }
2083:
2084: sub get_param {
2085: my ($param,$parstack,$safeeval,$context,$case_insensitive) = @_;
2086: if ( ! $context ) { $context = -1; }
2087: my $args ='';
2088: if ( $#$parstack > (-2-$context) ) { $args=$$parstack[$context]; }
2089: if ( ! $Apache::lonxml::usestyle ) {
2090: $args=$Apache::lonxml::style_values.$args;
2091: }
2092: if ( ! $args ) { return undef; }
2093: if ( $case_insensitive ) {
2094: if ($args =~ s/(my (?:.*))(\$\Q$param\E[,\)])/$1.lc($2)/ei) {
2095: return &Apache::run::run("{$args;".'return $'.$param.'}',
2096: $safeeval); #'
2097: } else {
2098: return undef;
2099: }
2100: } else {
2101: if ( $args =~ /my .*\$\Q$param\E[,\)]/ ) {
2102: return &Apache::run::run("{$args;".'return $'.$param.'}',
2103: $safeeval); #'
2104: } else {
2105: return undef;
2106: }
2107: }
2108: }
2109:
2110: sub get_param_var {
2111: my ($param,$parstack,$safeeval,$context,$case_insensitive) = @_;
2112: if ( ! $context ) { $context = -1; }
2113: my $args ='';
2114: if ( $#$parstack > (-2-$context) ) { $args=$$parstack[$context]; }
2115: if ( ! $Apache::lonxml::usestyle ) {
2116: $args=$Apache::lonxml::style_values.$args;
2117: }
2118: &Apache::lonxml::debug("Args are $args param is $param");
2119: if ($case_insensitive) {
2120: if (! ($args=~s/(my (?:.*))(\$\Q$param\E[,\)])/$1.lc($2)/ei)) {
2121: return undef;
2122: }
2123: } elsif ( $args !~ /my .*\$\Q$param\E[,\)]/ ) { return undef; }
2124: my $value=&Apache::run::run("{$args;".'return $'.$param.'}',$safeeval); #'
2125: &Apache::lonxml::debug("first run is $value");
2126: if ($value =~ /^[\$\@\%][a-zA-Z_]\w*$/) {
2127: &Apache::lonxml::debug("doing second");
2128: my @result=&Apache::run::run("return $value",$safeeval,1);
2129: if (!defined($result[0])) {
2130: return $value
2131: } else {
2132: if (wantarray) { return @result; } else { return $result[0]; }
2133: }
2134: } else {
2135: return $value;
2136: }
2137: }
2138:
2139: sub register_insert_xml {
2140: my $parser = HTML::LCParser->new($Apache::lonnet::perlvar{'lonTabDir'}
2141: .'/insertlist.xml');
2142: my ($tagnum,$in_help)=(0,0);
2143: my @alltags;
2144: my $tag;
2145: while (my $token = $parser->get_token()) {
2146: if ($token->[0] eq 'S') {
2147: my $key;
2148: if ($token->[1] eq 'tag') {
2149: $tag = $token->[2]{'name'};
2150: if (defined($tag)) {
2151: $insertlist{$tagnum.'.tag'} = $tag;
2152: $insertlist{$tag.'.num'} = $tagnum;
2153: push(@alltags,$tag);
2154: }
2155: } elsif ($in_help && $token->[1] eq 'file') {
2156: $key = $tag.'.helpfile';
2157: } elsif ($in_help && $token->[1] eq 'description') {
2158: $key = $tag.'.helpdesc';
2159: } elsif ($token->[1] eq 'description' ||
2160: $token->[1] eq 'color' ||
2161: $token->[1] eq 'show' ) {
2162: $key = $tag.'.'.$token->[1];
2163: } elsif ($token->[1] eq 'insert_sub') {
2164: $key = $tag.'.function';
2165: } elsif ($token->[1] eq 'help') {
2166: $in_help=1;
2167: } elsif ($token->[1] eq 'allow') {
2168: $key = $tag.'.allow';
2169: }
2170: if (defined($key)) {
2171: $insertlist{$key} = $parser->get_text();
2172: $insertlist{$key} =~ s/(^\s*|\s*$ )//gx;
2173: }
2174: } elsif ($token->[0] eq 'E') {
2175: if ($token->[1] eq 'tag') {
2176: undef($tag);
2177: $tagnum++;
2178: } elsif ($token->[1] eq 'help') {
2179: undef($in_help);
2180: }
2181: }
2182: }
2183:
2184: # parse the allows and ignore tags set to <show>no</show>
2185: foreach my $tag (@alltags) {
2186: next if (!exists($insertlist{$tag.'.allow'}));
2187: my $allow = $insertlist{$tag.'.allow'};
2188: foreach my $element (split(',',$allow)) {
2189: $element =~ s/(^\s*|\s*$ )//gx;
2190: if (!exists($insertlist{$element.'.show'})
2191: || $insertlist{$element.'.show'} ne 'no') {
2192: push(@{ $insertlist{$tag.'.which'} },$element);
2193: }
2194: }
2195: }
2196: }
2197:
2198: sub register_insert {
2199: return ®ister_insert_xml(@_);
2200: # &dump_insertlist('2');
2201: }
2202:
2203: sub dump_insertlist {
2204: my ($ext) = @_;
2205: open(XML,">/tmp/insertlist.xml.$ext");
2206: print XML ("<insertlist>");
2207: my $i=0;
2208:
2209: while (exists($insertlist{"$i.tag"})) {
2210: my $tag = $insertlist{"$i.tag"};
2211: print XML ("
2212: \t<tag name=\"$tag\">");
2213: if (defined($insertlist{"$tag.description"})) {
2214: print XML ("
2215: \t\t<description>".$insertlist{"$tag.description"}."</description>");
2216: }
2217: if (defined($insertlist{"$tag.color"})) {
2218: print XML ("
2219: \t\t<color>".$insertlist{"$tag.color"}."</color>");
2220: }
2221: if (defined($insertlist{"$tag.function"})) {
2222: print XML ("
2223: \t\t<insert_sub>".$insertlist{"$tag.function"}."</insert_sub>");
2224: }
2225: if (defined($insertlist{"$tag.show"})
2226: && $insertlist{"$tag.show"} ne 'yes') {
2227: print XML ("
2228: \t\t<show>".$insertlist{"$tag.show"}."</show>");
2229: }
2230: if (defined($insertlist{"$tag.helpfile"})) {
2231: print XML ("
2232: \t\t<help>
2233: \t\t\t<file>".$insertlist{"$tag.helpfile"}."</file>");
2234: if ($insertlist{"$tag.helpdesc"} ne '') {
2235: print XML ("
2236: \t\t\t<description>".$insertlist{"$tag.helpdesc"}."</description>");
2237: }
2238: print XML ("
2239: \t\t</help>");
2240: }
2241: if (defined($insertlist{"$tag.which"})) {
2242: print XML ("
2243: \t\t<allow>".join(',',sort(@{ $insertlist{"$tag.which"} }))."</allow>");
2244: }
2245: print XML ("
2246: \t</tag>");
2247: $i++;
2248: }
2249: print XML ("\n</insertlist>\n");
2250: close(XML);
2251: }
2252:
2253: sub description {
2254: my ($token)=@_;
2255: my $tag = &get_tag($token);
2256: return $insertlist{$tag.'.description'};
2257: }
2258:
2259: # Returns a list containing the help file, and the description
2260: sub helpinfo {
2261: my ($token)=@_;
2262: my $tag = &get_tag($token);
2263: return ($insertlist{$tag.'.helpfile'}, $insertlist{$tag.'.helpdesc'});
2264: }
2265:
2266: sub get_tag {
2267: my ($token)=@_;
2268: my $tagnum;
2269: my $tag=$token->[1];
2270: foreach my $namespace (reverse(@Apache::lonxml::namespace)) {
2271: my $testtag = $namespace.'::'.$tag;
2272: $tagnum = $insertlist{"$testtag.num"};
2273: last if (defined($tagnum));
2274: }
2275: if (!defined($tagnum)) {
2276: $tagnum = $Apache::lonxml::insertlist{"$tag.num"};
2277: }
2278: return $insertlist{"$tagnum.tag"};
2279: }
2280:
2281: ############################################################
2282: # PDF-FORM-METHODS
2283:
2284: =pod
2285:
2286: =item &print_pdf_radiobutton(fieldname, value)
2287:
2288: Returns a latexline to generate a PDF-Form-Radiobutton.
2289: Note: Radiobuttons with equal names are automaticly grouped
2290: in a selection-group.
2291:
2292: $fieldname: PDF internalname of the radiobutton(group)
2293: $value: Value of radiobutton
2294:
2295: =cut
2296: sub print_pdf_radiobutton {
2297: my ($fieldname, $value) = @_;
2298: return '\radioButton[\symbolchoice{circle}]{'
2299: .$fieldname.'}{10bp}{10bp}{'.$value.'}';
2300: }
2301:
2302:
2303: =pod
2304:
2305: =item &print_pdf_start_combobox(fieldname)
2306:
2307: Starts a latexline to generate a PDF-Form-Combobox with text.
2308:
2309: $fieldname: PDF internal name of the Combobox
2310:
2311: =cut
2312: sub print_pdf_start_combobox {
2313: my $result;
2314: my ($fieldName) = @_;
2315: $result .= '\begin{tabularx}{\textwidth}{p{2.5cm}X}'."\n";
2316: $result .= '\comboBox[]{'.$fieldName.'}{2.3cm}{14bp}{'; #
2317:
2318: return $result;
2319: }
2320:
2321:
2322: =pod
2323:
2324: =item &print_pdf_add_combobox_option(options)
2325:
2326: Generates a latexline to add Options to a PDF-Form-ComboBox.
2327:
2328: $option: PDF internal name of the Combobox-Option
2329:
2330: =cut
2331: sub print_pdf_add_combobox_option {
2332:
2333: my $result;
2334: my ($option) = @_;
2335:
2336: $result .= '('.$option.')';
2337:
2338: return $result;
2339: }
2340:
2341:
2342: =pod
2343:
2344: =item &print_pdf_end_combobox(text) {
2345:
2346: Returns latexcode to end a PDF-Form-Combobox with text.
2347:
2348: =cut
2349: sub print_pdf_end_combobox {
2350: my $result;
2351: my ($text) = @_;
2352:
2353: $result .= '}&'.$text."\\\\\n";
2354: $result .= '\end{tabularx}' . "\n";
2355: $result .= '\hspace{2mm}' . "\n";
2356: return $result;
2357: }
2358:
2359:
2360: =pod
2361:
2362: =item &print_pdf_hiddenField(fieldname, user, domain)
2363:
2364: Returns a latexline to generate a PDF-Form-hiddenField with userdata.
2365:
2366: $fieldname label for hiddentextfield
2367: $user: name of user
2368: $domain: domain of user
2369:
2370: =cut
2371: sub print_pdf_hiddenfield {
2372: my $result;
2373: my ($fieldname, $user, $domain) = @_;
2374:
2375: $result .= '\textField [\F{\FHidden}\F{-\FPrint}\V{'.$domain.'&'.$user.'}]{'.$fieldname.'}{0in}{0in}'."\n";
2376:
2377: return $result;
2378: }
2379:
2380: 1;
2381: __END__
2382:
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