1: # The LearningOnline Network with CAPA
2: # XML Parser Module
3: #
4: # $Id: lonxml.pm,v 1.432 2006/12/19 14:53:18 www Exp $
5: #
6: # Copyright Michigan State University Board of Trustees
7: #
8: # This file is part of the LearningOnline Network with CAPA (LON-CAPA).
9: #
10: # LON-CAPA is free software; you can redistribute it and/or modify
11: # it under the terms of the GNU General Public License as published by
12: # the Free Software Foundation; either version 2 of the License, or
13: # (at your option) any later version.
14: #
15: # LON-CAPA is distributed in the hope that it will be useful,
16: # but WITHOUT ANY WARRANTY; without even the implied warranty of
17: # MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
18: # GNU General Public License for more details.
19: #
20: # You should have received a copy of the GNU General Public License
21: # along with LON-CAPA; if not, write to the Free Software
22: # Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA 02111-1307 USA
23: #
24: # /home/httpd/html/adm/gpl.txt
25: #
26: # http://www.lon-capa.org/
27: #
28: # Copyright for TtHfunc and TtMfunc by Ian Hutchinson.
29: # TtHfunc and TtMfunc (the "Code") may be compiled and linked into
30: # binary executable programs or libraries distributed by the
31: # Michigan State University (the "Licensee"), but any binaries so
32: # distributed are hereby licensed only for use in the context
33: # of a program or computational system for which the Licensee is the
34: # primary author or distributor, and which performs substantial
35: # additional tasks beyond the translation of (La)TeX into HTML.
36: # The C source of the Code may not be distributed by the Licensee
37: # to any other parties under any circumstances.
38: #
39:
40:
41: package Apache::lonxml;
42: use vars
43: qw(@pwd @outputstack $redirection $import @extlinks $metamode $evaluate %insertlist @namespace $errorcount $warningcount);
44: use strict;
45: use HTML::LCParser();
46: use HTML::TreeBuilder();
47: use HTML::Entities();
48: use Safe();
49: use Safe::Hole();
50: use Math::Cephes();
51: use Math::Random();
52: use Opcode();
53: use POSIX qw(strftime);
54: use Time::HiRes qw( gettimeofday tv_interval );
55: use Symbol();
56:
57: sub register {
58: my ($space,@taglist) = @_;
59: foreach my $temptag (@taglist) {
60: push(@{ $Apache::lonxml::alltags{$temptag} },$space);
61: }
62: }
63:
64: sub deregister {
65: my ($space,@taglist) = @_;
66: foreach my $temptag (@taglist) {
67: my $tempspace = $Apache::lonxml::alltags{$temptag}[-1];
68: if ($tempspace eq $space) {
69: pop(@{ $Apache::lonxml::alltags{$temptag} });
70: }
71: }
72: #&printalltags();
73: }
74:
75: use Apache::Constants qw(:common);
76: use Apache::lontexconvert();
77: use Apache::style();
78: use Apache::run();
79: use Apache::londefdef();
80: use Apache::scripttag();
81: use Apache::languagetags();
82: use Apache::edit();
83: use Apache::inputtags();
84: use Apache::outputtags();
85: use Apache::lonnet;
86: use Apache::File();
87: use Apache::loncommon();
88: use Apache::lonfeedback();
89: use Apache::lonmsg();
90: use Apache::loncacc();
91: use Apache::lonmaxima();
92: use Apache::lonlocal;
93:
94: #================================================== Main subroutine: xmlparse
95: #debugging control, to turn on debugging modify the correct handler
96: $Apache::lonxml::debug=0;
97:
98: # keeps count of the number of warnings and errors generated in a parse
99: $warningcount=0;
100: $errorcount=0;
101:
102: #path to the directory containing the file currently being processed
103: @pwd=();
104:
105: #these two are used for capturing a subset of the output for later processing,
106: #don't touch them directly use &startredirection and &endredirection
107: @outputstack = ();
108: $redirection = 0;
109:
110: #controls wheter the <import> tag actually does
111: $import = 1;
112: @extlinks=();
113:
114: # meta mode is a bit weird only some output is to be turned off
115: #<output> tag turns metamode off (defined in londefdef.pm)
116: $metamode = 0;
117:
118: # turns on and of run::evaluate actually derefencing var refs
119: $evaluate = 1;
120:
121: # data structure for eidt mode, determines what tags can go into what other tags
122: %insertlist=();
123:
124: # stores the list of active tag namespaces
125: @namespace=();
126:
127: # a pointer the the Apache request object
128: $Apache::lonxml::request='';
129:
130: # a problem number counter, and check on ether it is used
131: $Apache::lonxml::counter=1;
132: $Apache::lonxml::counter_changed=0;
133:
134: #internal check on whether to look at style defs
135: $Apache::lonxml::usestyle=1;
136:
137: #locations used to store the parameter string for style substitutions
138: $Apache::lonxml::style_values='';
139: $Apache::lonxml::style_end_values='';
140:
141: #array of ssi calls that need to occur after we are done parsing
142: @Apache::lonxml::ssi_info=();
143:
144: #should we do the postag variable interpolation
145: $Apache::lonxml::post_evaluate=1;
146:
147: #a header message to emit in the case of any generated warning or errors
148: $Apache::lonxml::warnings_error_header='';
149:
150: # Control whether or not LaTeX symbols should be substituted for their
151: # \ style equivalents...this may be turned off e.g. in an verbatim
152: # environment.
153:
154: $Apache::lonxml::substitute_LaTeX_symbols = 1; # Starts out on.
155:
156: sub enable_LaTeX_substitutions {
157: $Apache::lonxml::substitute_LaTeX_symbols = 1;
158: }
159: sub disable_LaTeX_substitutions {
160: $Apache::lonxml::substitute_LaTeX_symbols = 0;
161: }
162:
163: sub xmlend {
164: my ($target,$parser)=@_;
165: my $mode='xml';
166: my $status='OPEN';
167: if ($Apache::lonhomework::parsing_a_problem ||
168: $Apache::lonhomework::parsing_a_task ) {
169: $mode='problem';
170: $status=$Apache::inputtags::status[-1];
171: }
172: my $discussion;
173: &Apache::loncommon::get_unprocessed_cgi($ENV{'QUERY_STRING'},
174: ['LONCAPA_INTERNAL_no_discussion']);
175: if (! exists($env{'form.LONCAPA_INTERNAL_no_discussion'}) ||
176: $env{'form.LONCAPA_INTERNAL_no_discussion'} ne 'true') {
177: $discussion=&Apache::lonfeedback::list_discussion($mode,$status);
178: }
179: if ($target eq 'tex') {
180: $discussion.='<tex>\keephidden{ENDOFPROBLEM}\vskip 0.5mm\noindent\makebox[\textwidth/$number_of_columns][b]{\hrulefill}\end{document}</tex>';
181: &Apache::lonxml::newparser($parser,\$discussion,'');
182: return '';
183: }
184:
185: return $discussion;
186: }
187:
188: sub tokeninputfield {
189: my $defhost=$Apache::lonnet::perlvar{'lonHostID'};
190: $defhost=~tr/a-z/A-Z/;
191: return (<<ENDINPUTFIELD)
192: <script type="text/javascript">
193: function updatetoken() {
194: var comp=new Array;
195: var barcode=unescape(document.tokeninput.barcode.value);
196: comp=barcode.split('*');
197: if (typeof(comp[0])!="undefined") {
198: document.tokeninput.codeone.value=comp[0];
199: }
200: if (typeof(comp[1])!="undefined") {
201: document.tokeninput.codetwo.value=comp[1];
202: }
203: if (typeof(comp[2])!="undefined") {
204: comp[2]=comp[2].toUpperCase();
205: document.tokeninput.codethree.value=comp[2];
206: }
207: document.tokeninput.barcode.value='';
208: }
209: </script>
210: <form method="post" name="tokeninput">
211: <table border="2" bgcolor="#FFFFBB">
212: <tr><th>DocID Checkin</th></tr>
213: <tr><td>
214: <table>
215: <tr>
216: <td>Scan in Barcode</td>
217: <td><input type="text" size="22" name="barcode"
218: onChange="updatetoken()"/></td>
219: </tr>
220: <tr><td><i>or</i> Type in DocID</td>
221: <td>
222: <input type="text" size="5" name="codeone" />
223: <b><font size="+2">*</font></b>
224: <input type="text" size="5" name="codetwo" />
225: <b><font size="+2">*</font></b>
226: <input type="text" size="10" name="codethree" value="$defhost"
227: onChange="this.value=this.value.toUpperCase()" />
228: </td></tr>
229: </table>
230: </td></tr>
231: <tr><td><input type="submit" value="Check in DocID" /></td></tr>
232: </table>
233: </form>
234: ENDINPUTFIELD
235: }
236:
237: sub maketoken {
238: my ($symb,$tuname,$tudom,$tcrsid)=@_;
239: unless ($symb) {
240: $symb=&Apache::lonnet::symbread();
241: }
242: unless ($tuname) {
243: $tuname=$env{'user.name'};
244: $tudom=$env{'user.domain'};
245: $tcrsid=$env{'request.course.id'};
246: }
247:
248: return &Apache::lonnet::checkout($symb,$tuname,$tudom,$tcrsid);
249: }
250:
251: sub printtokenheader {
252: my ($target,$token,$tsymb,$tcrsid,$tudom,$tuname)=@_;
253: unless ($token) { return ''; }
254:
255: my ($symb,$courseid,$domain,$name) = &Apache::lonnet::whichuser();
256: unless ($tsymb) {
257: $tsymb=$symb;
258: }
259: unless ($tuname) {
260: $tuname=$name;
261: $tudom=$domain;
262: $tcrsid=$courseid;
263: }
264:
265: my $plainname=&Apache::loncommon::plainname($tuname,$tudom);
266:
267: if ($target eq 'web') {
268: my %idhash=&Apache::lonnet::idrget($tudom,($tuname));
269: return
270: '<img align="right" src="/cgi-bin/barcode.png?encode='.$token.'" />'.
271: &mt('Checked out for').' '.$plainname.
272: '<br />'.&mt('User').': '.$tuname.' at '.$tudom.
273: '<br />'.&mt('ID').': '.$idhash{$tuname}.
274: '<br />'.&mt('CourseID').': '.$tcrsid.
275: '<br />'.&mt('Course').': '.$env{'course.'.$tcrsid.'.description'}.
276: '<br />'.&mt('DocID').': '.$token.
277: '<br />'.&mt('Time').': '.&Apache::lonlocal::locallocaltime().'<hr />';
278: } else {
279: return $token;
280: }
281: }
282:
283: sub printalltags {
284: my $temp;
285: foreach $temp (sort keys %Apache::lonxml::alltags) {
286: &Apache::lonxml::debug("$temp -- ".
287: join(',',@{ $Apache::lonxml::alltags{$temp} }));
288: }
289: }
290:
291: sub xmlparse {
292: my ($request,$target,$content_file_string,$safeinit,%style_for_target) = @_;
293:
294: &setup_globals($request,$target);
295: &Apache::inputtags::initialize_inputtags();
296: &Apache::bridgetask::initialize_bridgetask();
297: &Apache::outputtags::initialize_outputtags();
298: &Apache::edit::initialize_edit();
299: &Apache::londefdef::initialize_londefdef();
300:
301: #
302: # do we have a course style file?
303: #
304:
305: if ($env{'request.course.id'} && $env{'request.state'} ne 'construct') {
306: my $bodytext=
307: $env{'course.'.$env{'request.course.id'}.'.default_xml_style'};
308: if ($bodytext) {
309: foreach my $file (split(',',$bodytext)) {
310: my $location=&Apache::lonnet::filelocation('',$file);
311: my $styletext=&Apache::lonnet::getfile($location);
312: if ($styletext ne '-1') {
313: %style_for_target = (%style_for_target,
314: &Apache::style::styleparser($target,$styletext));
315: }
316: }
317: }
318: } elsif ($env{'construct.style'} && ($env{'request.state'} eq 'construct')) {
319: my $location=&Apache::lonnet::filelocation('',$env{'construct.style'});
320: my $styletext=&Apache::lonnet::getfile($location);
321: if ($styletext ne '-1') {
322: %style_for_target = (%style_for_target,
323: &Apache::style::styleparser($target,$styletext));
324: }
325: }
326: #&printalltags();
327: my @pars = ();
328: my $pwd=$env{'request.filename'};
329: $pwd =~ s:/[^/]*$::;
330: &newparser(\@pars,\$content_file_string,$pwd);
331:
332: my $safeeval = new Safe;
333: my $safehole = new Safe::Hole;
334: &init_safespace($target,$safeeval,$safehole,$safeinit);
335: #-------------------- Redefinition of the target in the case of compound target
336:
337: ($target, my @tenta) = split('&&',$target);
338:
339: my @stack = ();
340: my @parstack = ();
341: &initdepth();
342: &init_alarm();
343: my $finaloutput = &inner_xmlparse($target,\@stack,\@parstack,\@pars,
344: $safeeval,\%style_for_target,1);
345:
346: if (@stack) {
347: &warning("At end of file some tags were still left unclosed, ".
348: '<tt><'.join('></tt>, <tt><',reverse(@stack)).
349: '></tt>');
350: }
351: if ($env{'request.uri'}) {
352: &writeallows($env{'request.uri'});
353: }
354: &do_registered_ssi();
355: if ($Apache::lonxml::counter_changed) { &store_counter() }
356:
357: &clean_safespace($safeeval);
358:
359: if ($env{'form.return_only_error_and_warning_counts'}) {
360: return "$errorcount:$warningcount";
361: }
362: return $finaloutput;
363: }
364:
365: sub latex_special_symbols {
366: my ($string,$where)=@_;
367: #
368: # If e.g. in verbatim mode, then don't substitute.
369: # but return original string.
370: #
371: if (!($Apache::lonxml::substitute_LaTeX_symbols)) {
372: return $string;
373: }
374: if ($where eq 'header') {
375: $string =~ s/\\/\$\\backslash\$/g; # \ -> $\backslash$ per LaTex line by line pg 10.
376: $string =~ s/(\$|%|\{|\})/\\$1/g;
377: $string=&Apache::lonprintout::character_chart($string);
378: # any & or # leftover should be safe to just escape
379: $string=~s/([^\\])\&/$1\\\&/g;
380: $string=~s/([^\\])\#/$1\\\#/g;
381: $string =~ s/_/\\_/g; # _ -> \_
382: $string =~ s/\^/\\\^{}/g; # ^ -> \^{}
383: } else {
384: $string=~s/\\/\\ensuremath{\\backslash}/g;
385: $string=~s/\\\%|\%/\\\%/g;
386: $string=~s/\\{|{/\\{/g;
387: $string=~s/\\}|}/\\}/g;
388: $string=~s/\\ensuremath\\{\\backslash\\}/\\ensuremath{\\backslash}/g;
389: $string=~s/\\\$|\$/\\\$/g;
390: $string=~s/\\\_|\_/\\\_/g;
391: $string=~s/([^\\]|^)(\~|\^)/$1\\$2\\strut /g;
392: $string=~s/(>|<)/\\ensuremath\{$1\}/g; #more or less
393: $string=&Apache::lonprintout::character_chart($string);
394: # any & or # leftover should be safe to just escape
395: $string=~s/\\\&|\&/\\\&/g;
396: $string=~s/\\\#|\#/\\\#/g;
397: $string=~s/\|/\$\\mid\$/g;
398: #single { or } How to escape?
399: }
400: return $string;
401: }
402:
403: sub inner_xmlparse {
404: my ($target,$stack,$parstack,$pars,$safeeval,$style_for_target,$start)=@_;
405: my $finaloutput = '';
406: my $result;
407: my $token;
408: my $dontpop=0;
409: my $startredirection = $Apache::lonxml::redirection;
410: while ( $#$pars > -1 ) {
411: while ($token = $$pars['-1']->get_token) {
412: if (($token->[0] eq 'T') || ($token->[0] eq 'C') ) {
413: if ($metamode<1) {
414: my $text=$token->[1];
415: if ($token->[0] eq 'C' && $target eq 'tex') {
416: $text = '';
417: # $text = '%'.$text."\n";
418: }
419: $result.=$text;
420: }
421: } elsif (($token->[0] eq 'D')) {
422: if ($metamode<1 && $target eq 'web') {
423: my $text=$token->[1];
424: $result.=$text;
425: }
426: } elsif ($token->[0] eq 'PI') {
427: if ($metamode<1 && $target eq 'web') {
428: $result=$token->[2];
429: }
430: } elsif ($token->[0] eq 'S') {
431: # add tag to stack
432: push (@$stack,$token->[1]);
433: # add parameters list to another stack
434: push (@$parstack,&parstring($token));
435: &increasedepth($token);
436: if ($Apache::lonxml::usestyle &&
437: exists($$style_for_target{$token->[1]})) {
438: $Apache::lonxml::usestyle=0;
439: my $string=$$style_for_target{$token->[1]}.
440: '<LONCAPA_INTERNAL_TURN_STYLE_ON />';
441: &Apache::lonxml::newparser($pars,\$string);
442: $Apache::lonxml::style_values=$$parstack[-1];
443: $Apache::lonxml::style_end_values=$$parstack[-1];
444: } else {
445: $result = &callsub("start_$token->[1]", $target, $token, $stack,
446: $parstack, $pars, $safeeval, $style_for_target);
447: }
448: } elsif ($token->[0] eq 'E') {
449: if ($Apache::lonxml::usestyle &&
450: exists($$style_for_target{'/'."$token->[1]"})) {
451: $Apache::lonxml::usestyle=0;
452: my $string=$$style_for_target{'/'.$token->[1]}.
453: '<LONCAPA_INTERNAL_TURN_STYLE_ON end="'.$token->[1].'" />';
454: &Apache::lonxml::newparser($pars,\$string);
455: $Apache::lonxml::style_values=$Apache::lonxml::style_end_values;
456: $Apache::lonxml::style_end_values='';
457: $dontpop=1;
458: } else {
459: #clear out any tags that didn't end
460: while ($token->[1] ne $$stack['-1'] && ($#$stack > -1)) {
461: my $lasttag=$$stack[-1];
462: if ($token->[1] =~ /^\Q$lasttag\E$/i) {
463: &Apache::lonxml::warning('Using tag </'.$token->[1].'> on line '.$token->[3].' as end tag to <'.$$stack[-1].'>');
464: last;
465: } else {
466: &Apache::lonxml::warning('Found tag </'.$token->[1].'> on line '.$token->[3].' when looking for </'.$$stack[-1].'> in file');
467: &end_tag($stack,$parstack,$token);
468: }
469: }
470: $result = &callsub("end_$token->[1]", $target, $token, $stack,
471: $parstack, $pars,$safeeval, $style_for_target);
472: }
473: } else {
474: &Apache::lonxml::error("Unknown token event :$token->[0]:$token->[1]:");
475: }
476: #evaluate variable refs in result
477: if ($Apache::lonxml::post_evaluate &&$result ne "") {
478: my $extras;
479: if (!$Apache::lonxml::usestyle) {
480: $extras=$Apache::lonxml::style_values;
481: }
482: if ( $#$parstack > -1 ) {
483: $result=&Apache::run::evaluate($result,$safeeval,$extras.$$parstack[-1]);
484: } else {
485: $result= &Apache::run::evaluate($result,$safeeval,$extras);
486: }
487: }
488: $Apache::lonxml::post_evaluate=1;
489:
490: if (($token->[0] eq 'T') || ($token->[0] eq 'C') || ($token->[0] eq 'D') ) {
491: #Style file definitions should be correct
492: if ($target eq 'tex' && ($Apache::lonxml::usestyle)) {
493: $result=&latex_special_symbols($result);
494: }
495: }
496:
497: if ($Apache::lonxml::redirection) {
498: $Apache::lonxml::outputstack['-1'] .= $result;
499: } else {
500: $finaloutput.=$result;
501: }
502: $result = '';
503:
504: if ($token->[0] eq 'E' && !$dontpop) {
505: &end_tag($stack,$parstack,$token);
506: }
507: $dontpop=0;
508: }
509: if ($#$pars > -1) {
510: pop @$pars;
511: pop @Apache::lonxml::pwd;
512: }
513: }
514:
515: # if ($target eq 'meta') {
516: # $finaloutput.=&endredirection;
517: # }
518:
519: if ( $start && $target eq 'grade') { &endredirection(); }
520: if ( $Apache::lonxml::redirection > $startredirection) {
521: while ($Apache::lonxml::redirection > $startredirection) {
522: $finaloutput .= &endredirection();
523: }
524: }
525: if (($ENV{'QUERY_STRING'}) && ($target eq 'web')) {
526: $finaloutput=&afterburn($finaloutput);
527: }
528: return $finaloutput;
529: }
530:
531: ##
532: ## Looks to see if there is a subroutine defined for this tag. If so, call it,
533: ## otherwise do not call it as we do not know what it is.
534: ##
535: sub callsub {
536: my ($sub,$target,$token,$tagstack,$parstack,$parser,$safeeval,$style)=@_;
537: my $currentstring='';
538: my $nodefault;
539: {
540: my $sub1;
541: no strict 'refs';
542: my $tag=$token->[1];
543: # get utterly rid of extended html tags
544: if ($tag=~/^x\-/i) { return ''; }
545: my $space=$Apache::lonxml::alltags{$tag}[-1];
546: if (!$space) {
547: $tag=~tr/A-Z/a-z/;
548: $sub=~tr/A-Z/a-z/;
549: $space=$Apache::lonxml::alltags{$tag}[-1]
550: }
551:
552: my $deleted=0;
553: $Apache::lonxml::curdepth=join('_',@Apache::lonxml::depthcounter);
554: if (($token->[0] eq 'S') && ($target eq 'modified')) {
555: $deleted=&Apache::edit::handle_delete($space,$target,$token,$tagstack,
556: $parstack,$parser,$safeeval,
557: $style);
558: }
559: if (!$deleted) {
560: if ($space) {
561: #&Apache::lonxml::debug("Calling sub $sub in $space $metamode");
562: $sub1="$space\:\:$sub";
563: ($currentstring,$nodefault) = &$sub1($target,$token,$tagstack,
564: $parstack,$parser,$safeeval,
565: $style);
566: } else {
567: if ($target eq 'tex') {
568: # throw away tag name
569: return '';
570: }
571: #&Apache::lonxml::debug("NOT Calling sub $sub in $space $metamode");
572: if ($metamode <1) {
573: if (defined($token->[4]) && ($metamode < 1)) {
574: $currentstring = $token->[4];
575: } else {
576: $currentstring = $token->[2];
577: }
578: }
579: }
580: # &Apache::lonxml::debug("nodefalt:$nodefault:");
581: if ($currentstring eq '' && $nodefault eq '') {
582: if ($target eq 'edit') {
583: #&Apache::lonxml::debug("doing default edit for $token->[1]");
584: if ($token->[0] eq 'S') {
585: $currentstring = &Apache::edit::tag_start($target,$token);
586: } elsif ($token->[0] eq 'E') {
587: $currentstring = &Apache::edit::tag_end($target,$token);
588: }
589: } elsif ($target eq 'modified') {
590: if ($token->[0] eq 'S') {
591: $currentstring = $token->[4];
592: $currentstring.=&Apache::edit::handle_insert();
593: } elsif ($token->[0] eq 'E') {
594: $currentstring = $token->[2];
595: $currentstring.=&Apache::edit::handle_insertafter($token->[1]);
596: } else {
597: $currentstring = $token->[2];
598: }
599: }
600: }
601: }
602: use strict 'refs';
603: }
604: return $currentstring;
605: }
606:
607: sub setup_globals {
608: my ($request,$target)=@_;
609: $Apache::lonxml::request=$request;
610: $errorcount=0;
611: $warningcount=0;
612: $Apache::lonxml::default_homework_loaded=0;
613: $Apache::lonxml::usestyle=1;
614: &init_counter();
615: @Apache::lonxml::pwd=();
616: @Apache::lonxml::extlinks=();
617: @Apache::lonxml::ssi_info=();
618: $Apache::lonxml::post_evaluate=1;
619: $Apache::lonxml::warnings_error_header='';
620: $Apache::lonxml::substitute_LaTeX_symbols = 1;
621: if ($target eq 'meta') {
622: $Apache::lonxml::redirection = 0;
623: $Apache::lonxml::metamode = 1;
624: $Apache::lonxml::evaluate = 1;
625: $Apache::lonxml::import = 0;
626: } elsif ($target eq 'answer') {
627: $Apache::lonxml::redirection = 0;
628: $Apache::lonxml::metamode = 1;
629: $Apache::lonxml::evaluate = 1;
630: $Apache::lonxml::import = 1;
631: } elsif ($target eq 'grade') {
632: &startredirection(); #ended in inner_xmlparse on exit
633: $Apache::lonxml::metamode = 0;
634: $Apache::lonxml::evaluate = 1;
635: $Apache::lonxml::import = 1;
636: } elsif ($target eq 'modified') {
637: $Apache::lonxml::redirection = 0;
638: $Apache::lonxml::metamode = 0;
639: $Apache::lonxml::evaluate = 0;
640: $Apache::lonxml::import = 0;
641: } elsif ($target eq 'edit') {
642: $Apache::lonxml::redirection = 0;
643: $Apache::lonxml::metamode = 0;
644: $Apache::lonxml::evaluate = 0;
645: $Apache::lonxml::import = 0;
646: } elsif ($target eq 'analyze') {
647: $Apache::lonxml::redirection = 0;
648: $Apache::lonxml::metamode = 0;
649: $Apache::lonxml::evaluate = 1;
650: $Apache::lonxml::import = 1;
651: } else {
652: $Apache::lonxml::redirection = 0;
653: $Apache::lonxml::metamode = 0;
654: $Apache::lonxml::evaluate = 1;
655: $Apache::lonxml::import = 1;
656: }
657: }
658:
659: sub init_safespace {
660: my ($target,$safeeval,$safehole,$safeinit) = @_;
661: $safeeval->deny_only(':dangerous');
662: $safeeval->reval('use Math::Complex;');
663: $safeeval->permit_only(":default");
664: $safeeval->permit("entereval");
665: $safeeval->permit(":base_math");
666: $safeeval->permit("sort");
667: $safeeval->permit("time");
668: $safeeval->deny("rand");
669: $safeeval->deny("srand");
670: $safeeval->deny(":base_io");
671: $safehole->wrap(\&Apache::scripttag::xmlparse,$safeeval,'&xmlparse');
672: $safehole->wrap(\&Apache::outputtags::multipart,$safeeval,'&multipart');
673: $safehole->wrap(\&Apache::lonnet::EXT,$safeeval,'&EXT');
674: $safehole->wrap(\&Apache::chemresponse::chem_standard_order,$safeeval,
675: '&chem_standard_order');
676: $safehole->wrap(\&Apache::response::check_status,$safeeval,'&check_status');
677:
678: $safehole->wrap(\&Apache::lonmaxima::maxima_eval,$safeeval,'&maxima_eval');
679: $safehole->wrap(\&Apache::lonmaxima::maxima_check,$safeeval,'&maxima_check');
680: $safehole->wrap(\&Apache::lonmaxima::maxima_cas_formula_fix,$safeeval,'&maxima_cas_formula_fix');
681: $safehole->wrap(\&capa_formula_fix,$safeeval,'&capa_formula_fix');
682:
683: $safehole->wrap(\&Math::Cephes::asin,$safeeval,'&asin');
684: $safehole->wrap(\&Math::Cephes::acos,$safeeval,'&acos');
685: $safehole->wrap(\&Math::Cephes::atan,$safeeval,'&atan');
686: $safehole->wrap(\&Math::Cephes::sinh,$safeeval,'&sinh');
687: $safehole->wrap(\&Math::Cephes::cosh,$safeeval,'&cosh');
688: $safehole->wrap(\&Math::Cephes::tanh,$safeeval,'&tanh');
689: $safehole->wrap(\&Math::Cephes::asinh,$safeeval,'&asinh');
690: $safehole->wrap(\&Math::Cephes::acosh,$safeeval,'&acosh');
691: $safehole->wrap(\&Math::Cephes::atanh,$safeeval,'&atanh');
692: $safehole->wrap(\&Math::Cephes::erf,$safeeval,'&erf');
693: $safehole->wrap(\&Math::Cephes::erfc,$safeeval,'&erfc');
694: $safehole->wrap(\&Math::Cephes::j0,$safeeval,'&j0');
695: $safehole->wrap(\&Math::Cephes::j1,$safeeval,'&j1');
696: $safehole->wrap(\&Math::Cephes::jn,$safeeval,'&jn');
697: $safehole->wrap(\&Math::Cephes::jv,$safeeval,'&jv');
698: $safehole->wrap(\&Math::Cephes::y0,$safeeval,'&y0');
699: $safehole->wrap(\&Math::Cephes::y1,$safeeval,'&y1');
700: $safehole->wrap(\&Math::Cephes::yn,$safeeval,'&yn');
701: $safehole->wrap(\&Math::Cephes::yv,$safeeval,'&yv');
702:
703: $safehole->wrap(\&Math::Cephes::bdtr ,$safeeval,'&bdtr' );
704: $safehole->wrap(\&Math::Cephes::bdtrc ,$safeeval,'&bdtrc' );
705: $safehole->wrap(\&Math::Cephes::bdtri ,$safeeval,'&bdtri' );
706: $safehole->wrap(\&Math::Cephes::btdtr ,$safeeval,'&btdtr' );
707: $safehole->wrap(\&Math::Cephes::chdtr ,$safeeval,'&chdtr' );
708: $safehole->wrap(\&Math::Cephes::chdtrc,$safeeval,'&chdtrc');
709: $safehole->wrap(\&Math::Cephes::chdtri,$safeeval,'&chdtri');
710: $safehole->wrap(\&Math::Cephes::fdtr ,$safeeval,'&fdtr' );
711: $safehole->wrap(\&Math::Cephes::fdtrc ,$safeeval,'&fdtrc' );
712: $safehole->wrap(\&Math::Cephes::fdtri ,$safeeval,'&fdtri' );
713: $safehole->wrap(\&Math::Cephes::gdtr ,$safeeval,'&gdtr' );
714: $safehole->wrap(\&Math::Cephes::gdtrc ,$safeeval,'&gdtrc' );
715: $safehole->wrap(\&Math::Cephes::nbdtr ,$safeeval,'&nbdtr' );
716: $safehole->wrap(\&Math::Cephes::nbdtrc,$safeeval,'&nbdtrc');
717: $safehole->wrap(\&Math::Cephes::nbdtri,$safeeval,'&nbdtri');
718: $safehole->wrap(\&Math::Cephes::ndtr ,$safeeval,'&ndtr' );
719: $safehole->wrap(\&Math::Cephes::ndtri ,$safeeval,'&ndtri' );
720: $safehole->wrap(\&Math::Cephes::pdtr ,$safeeval,'&pdtr' );
721: $safehole->wrap(\&Math::Cephes::pdtrc ,$safeeval,'&pdtrc' );
722: $safehole->wrap(\&Math::Cephes::pdtri ,$safeeval,'&pdtri' );
723: $safehole->wrap(\&Math::Cephes::stdtr ,$safeeval,'&stdtr' );
724: $safehole->wrap(\&Math::Cephes::stdtri,$safeeval,'&stdtri');
725:
726: $safehole->wrap(\&Math::Cephes::Matrix::mat,$safeeval,'&mat');
727: $safehole->wrap(\&Math::Cephes::Matrix::new,$safeeval,
728: '&Math::Cephes::Matrix::new');
729: $safehole->wrap(\&Math::Cephes::Matrix::coef,$safeeval,
730: '&Math::Cephes::Matrix::coef');
731: $safehole->wrap(\&Math::Cephes::Matrix::clr,$safeeval,
732: '&Math::Cephes::Matrix::clr');
733: $safehole->wrap(\&Math::Cephes::Matrix::add,$safeeval,
734: '&Math::Cephes::Matrix::add');
735: $safehole->wrap(\&Math::Cephes::Matrix::sub,$safeeval,
736: '&Math::Cephes::Matrix::sub');
737: $safehole->wrap(\&Math::Cephes::Matrix::mul,$safeeval,
738: '&Math::Cephes::Matrix::mul');
739: $safehole->wrap(\&Math::Cephes::Matrix::div,$safeeval,
740: '&Math::Cephes::Matrix::div');
741: $safehole->wrap(\&Math::Cephes::Matrix::inv,$safeeval,
742: '&Math::Cephes::Matrix::inv');
743: $safehole->wrap(\&Math::Cephes::Matrix::transp,$safeeval,
744: '&Math::Cephes::Matrix::transp');
745: $safehole->wrap(\&Math::Cephes::Matrix::simq,$safeeval,
746: '&Math::Cephes::Matrix::simq');
747: $safehole->wrap(\&Math::Cephes::Matrix::mat_to_vec,$safeeval,
748: '&Math::Cephes::Matrix::mat_to_vec');
749: $safehole->wrap(\&Math::Cephes::Matrix::vec_to_mat,$safeeval,
750: '&Math::Cephes::Matrix::vec_to_mat');
751: $safehole->wrap(\&Math::Cephes::Matrix::check,$safeeval,
752: '&Math::Cephes::Matrix::check');
753: $safehole->wrap(\&Math::Cephes::Matrix::check,$safeeval,
754: '&Math::Cephes::Matrix::check');
755:
756: # $safehole->wrap(\&Math::Cephes::new_fract,$safeeval,'&new_fract');
757: # $safehole->wrap(\&Math::Cephes::radd,$safeeval,'&radd');
758: # $safehole->wrap(\&Math::Cephes::rsub,$safeeval,'&rsub');
759: # $safehole->wrap(\&Math::Cephes::rmul,$safeeval,'&rmul');
760: # $safehole->wrap(\&Math::Cephes::rdiv,$safeeval,'&rdiv');
761: # $safehole->wrap(\&Math::Cephes::euclid,$safeeval,'&euclid');
762:
763: $safehole->wrap(\&Math::Random::random_beta,$safeeval,'&math_random_beta');
764: $safehole->wrap(\&Math::Random::random_chi_square,$safeeval,'&math_random_chi_square');
765: $safehole->wrap(\&Math::Random::random_exponential,$safeeval,'&math_random_exponential');
766: $safehole->wrap(\&Math::Random::random_f,$safeeval,'&math_random_f');
767: $safehole->wrap(\&Math::Random::random_gamma,$safeeval,'&math_random_gamma');
768: $safehole->wrap(\&Math::Random::random_multivariate_normal,$safeeval,'&math_random_multivariate_normal');
769: $safehole->wrap(\&Math::Random::random_multinomial,$safeeval,'&math_random_multinomial');
770: $safehole->wrap(\&Math::Random::random_noncentral_chi_square,$safeeval,'&math_random_noncentral_chi_square');
771: $safehole->wrap(\&Math::Random::random_noncentral_f,$safeeval,'&math_random_noncentral_f');
772: $safehole->wrap(\&Math::Random::random_normal,$safeeval,'&math_random_normal');
773: $safehole->wrap(\&Math::Random::random_permutation,$safeeval,'&math_random_permutation');
774: $safehole->wrap(\&Math::Random::random_permuted_index,$safeeval,'&math_random_permuted_index');
775: $safehole->wrap(\&Math::Random::random_uniform,$safeeval,'&math_random_uniform');
776: $safehole->wrap(\&Math::Random::random_poisson,$safeeval,'&math_random_poisson');
777: $safehole->wrap(\&Math::Random::random_uniform_integer,$safeeval,'&math_random_uniform_integer');
778: $safehole->wrap(\&Math::Random::random_negative_binomial,$safeeval,'&math_random_negative_binomial');
779: $safehole->wrap(\&Math::Random::random_binomial,$safeeval,'&math_random_binomial');
780: $safehole->wrap(\&Math::Random::random_seed_from_phrase,$safeeval,'&random_seed_from_phrase');
781: $safehole->wrap(\&Math::Random::random_set_seed_from_phrase,$safeeval,'&random_set_seed_from_phrase');
782: $safehole->wrap(\&Math::Random::random_get_seed,$safeeval,'&random_get_seed');
783: $safehole->wrap(\&Math::Random::random_set_seed,$safeeval,'&random_set_seed');
784: $safehole->wrap(\&Apache::lonxml::error,$safeeval,'&LONCAPA_INTERNAL_ERROR');
785: $safehole->wrap(\&Apache::lonxml::debug,$safeeval,'&LONCAPA_INTERNAL_DEBUG');
786: $safehole->wrap(\&Apache::lonnet::logthis,$safeeval,'&LONCAPA_INTERNAL_LOGTHIS');
787: $safehole->wrap(\&Apache::inputtags::finalizeawards,$safeeval,'&LONCAPA_INTERNAL_FINALIZEAWARDS');
788: $safehole->wrap(\&Apache::caparesponse::get_sigrange,$safeeval,'&LONCAPA_INTERNAL_get_sigrange');
789: # use Data::Dumper;
790: # $safehole->wrap(\&Data::Dumper::Dumper,$safeeval,'&LONCAPA_INTERNAL_Dumper');
791: #need to inspect this class of ops
792: # $safeeval->deny(":base_orig");
793: $safeeval->permit("require");
794: $safeinit .= ';$external::target="'.$target.'";';
795: &Apache::run::run($safeinit,$safeeval);
796: &initialize_rndseed($safeeval);
797: }
798:
799: sub clean_safespace {
800: my ($safeeval) = @_;
801: delete_package_recurse($safeeval->{Root});
802: }
803:
804: sub delete_package_recurse {
805: my ($package) = @_;
806: my @subp;
807: {
808: no strict 'refs';
809: while (my ($key,$val) = each(%{*{"$package\::"}})) {
810: if (!defined($val)) { next; }
811: local (*ENTRY) = $val;
812: if (defined *ENTRY{HASH} && $key =~ /::$/ &&
813: $key ne "main::" && $key ne "<none>::")
814: {
815: my ($p) = $package ne "main" ? "$package\::" : "";
816: ($p .= $key) =~ s/::$//;
817: push(@subp,$p);
818: }
819: }
820: }
821: foreach my $p (@subp) {
822: delete_package_recurse($p);
823: }
824: Symbol::delete_package($package);
825: }
826:
827: sub initialize_rndseed {
828: my ($safeeval)=@_;
829: my $rndseed;
830: my ($symb,$courseid,$domain,$name) = &Apache::lonnet::whichuser();
831: $rndseed=&Apache::lonnet::rndseed($symb,$courseid,$domain,$name);
832: my $safeinit = '$external::randomseed="'.$rndseed.'";';
833: &Apache::lonxml::debug("Setting rndseed to $rndseed");
834: &Apache::run::run($safeinit,$safeeval);
835: }
836:
837: sub default_homework_load {
838: my ($safeeval)=@_;
839: &Apache::lonxml::debug('Loading default_homework');
840: my $default=&Apache::lonnet::getfile('/home/httpd/html/res/adm/includes/default_homework.lcpm');
841: if ($default eq -1) {
842: &Apache::lonxml::error("<b>Unable to find <i>default_homework.lcpm</i></b>");
843: } else {
844: &Apache::run::run($default,$safeeval);
845: $Apache::lonxml::default_homework_loaded=1;
846: }
847: }
848:
849: {
850: my $alarm_depth;
851: sub init_alarm {
852: alarm(0);
853: $alarm_depth=0;
854: }
855:
856: sub start_alarm {
857: if ($alarm_depth<1) {
858: my $old=alarm($Apache::lonnet::perlvar{'lonScriptTimeout'});
859: if ($old) {
860: &Apache::lonxml::error("Cancelled an alarm of $old, this shouldn't occur.");
861: }
862: }
863: $alarm_depth++;
864: }
865:
866: sub end_alarm {
867: $alarm_depth--;
868: if ($alarm_depth<1) { alarm(0); }
869: }
870: }
871: my $metamode_was;
872: sub startredirection {
873: if (!$Apache::lonxml::redirection) {
874: $metamode_was=$Apache::lonxml::metamode;
875: }
876: $Apache::lonxml::metamode=0;
877: $Apache::lonxml::redirection++;
878: push (@Apache::lonxml::outputstack, '');
879: }
880:
881: sub endredirection {
882: if (!$Apache::lonxml::redirection) {
883: &Apache::lonxml::error("Endredirection was called before a startredirection, perhaps you have unbalanced tags. Some debugging information:".join ":",caller);
884: return '';
885: }
886: $Apache::lonxml::redirection--;
887: if (!$Apache::lonxml::redirection) {
888: $Apache::lonxml::metamode=$metamode_was;
889: }
890: pop @Apache::lonxml::outputstack;
891: }
892:
893: sub end_tag {
894: my ($tagstack,$parstack,$token)=@_;
895: pop(@$tagstack);
896: pop(@$parstack);
897: &decreasedepth($token);
898: }
899:
900: sub initdepth {
901: @Apache::lonxml::depthcounter=();
902: $Apache::lonxml::depth=-1;
903: $Apache::lonxml::olddepth=-1;
904: }
905:
906: my @timers;
907: my $lasttime;
908: sub increasedepth {
909: my ($token) = @_;
910: $Apache::lonxml::depth++;
911: $Apache::lonxml::depthcounter[$Apache::lonxml::depth]++;
912: if ($Apache::lonxml::depthcounter[$Apache::lonxml::depth]==1) {
913: $Apache::lonxml::olddepth=$Apache::lonxml::depth;
914: }
915: my $time;
916: if ($Apache::lonxml::debug eq "1") {
917: push(@timers,[&gettimeofday()]);
918: $time=&tv_interval($lasttime);
919: $lasttime=[&gettimeofday()];
920: }
921: my $spacing=' 'x($Apache::lonxml::depth-1);
922: my $curdepth=join('_',@Apache::lonxml::depthcounter);
923: &Apache::lonxml::debug("s$spacing$Apache::lonxml::depth : $Apache::lonxml::olddepth : $curdepth : $token->[1] : $time : \n");
924: #print "<br />s $Apache::lonxml::depth : $Apache::lonxml::olddepth : $curdepth : $token->[1]\n";
925: }
926:
927: sub decreasedepth {
928: my ($token) = @_;
929: $Apache::lonxml::depth--;
930: if ($Apache::lonxml::depth<$Apache::lonxml::olddepth-1) {
931: $#Apache::lonxml::depthcounter--;
932: $Apache::lonxml::olddepth=$Apache::lonxml::depth+1;
933: }
934: if ( $Apache::lonxml::depth < -1) {
935: &Apache::lonxml::warning(&mt("Missing tags, unable to properly run file."));
936: $Apache::lonxml::depth='-1';
937: }
938: my ($timer,$time);
939: if ($Apache::lonxml::debug eq "1") {
940: $timer=pop(@timers);
941: $time=&tv_interval($lasttime);
942: $lasttime=[&gettimeofday()];
943: }
944: my $spacing=' 'x$Apache::lonxml::depth;
945: my $curdepth=join('_',@Apache::lonxml::depthcounter);
946: &Apache::lonxml::debug("e$spacing$Apache::lonxml::depth : $Apache::lonxml::olddepth : $curdepth : $token->[1] : $time : ".&tv_interval($timer)."\n");
947: #print "<br />e $Apache::lonxml::depth : $Apache::lonxml::olddepth : $token->[1] : $curdepth\n";
948: }
949:
950: sub get_id {
951: my ($parstack,$safeeval)=@_;
952: my $id= &Apache::lonxml::get_param('id',$parstack,$safeeval);
953: if ($env{'request.state'} eq 'construct' && $id =~ /(\.|_)/) {
954: &error(&mt("IDs are not allowed to contain "<tt>_</tt>" or "<tt>.</tt>""));
955: }
956: if ($id =~ /^\s*$/) { $id = $Apache::lonxml::curdepth; }
957: return $id;
958: }
959:
960: sub get_all_text_unbalanced {
961: #there is a copy of this in lonpublisher.pm
962: my($tag,$pars)= @_;
963: my $token;
964: my $result='';
965: $tag='<'.$tag.'>';
966: while ($token = $$pars[-1]->get_token) {
967: if (($token->[0] eq 'T')||($token->[0] eq 'C')||($token->[0] eq 'D')) {
968: if ($token->[0] eq 'T' && $token->[2]) {
969: $result.='<![CDATA['.$token->[1].']]>';
970: } else {
971: $result.=$token->[1];
972: }
973: } elsif ($token->[0] eq 'PI') {
974: $result.=$token->[2];
975: } elsif ($token->[0] eq 'S') {
976: $result.=$token->[4];
977: } elsif ($token->[0] eq 'E') {
978: $result.=$token->[2];
979: }
980: if ($result =~ /\Q$tag\E/is) {
981: ($result,my $redo)=$result =~ /(.*)\Q$tag\E(.*)/is;
982: #&Apache::lonxml::debug('Got a winner with leftovers ::'.$2);
983: #&Apache::lonxml::debug('Result is :'.$1);
984: $redo=$tag.$redo;
985: &Apache::lonxml::newparser($pars,\$redo);
986: last;
987: }
988: }
989: return $result
990: }
991:
992: sub increment_counter {
993: my ($increment) = @_;
994: if (defined($increment) && $increment gt 0) {
995: $Apache::lonxml::counter+=$increment;
996: } else {
997: $Apache::lonxml::counter++;
998: }
999: $Apache::lonxml::counter_changed=1;
1000: }
1001:
1002: sub init_counter {
1003: if ($env{'request.state'} eq 'construct') {
1004: $Apache::lonxml::counter=1;
1005: $Apache::lonxml::counter_changed=1;
1006: } elsif (defined($env{'form.counter'})) {
1007: $Apache::lonxml::counter=$env{'form.counter'};
1008: $Apache::lonxml::counter_changed=0;
1009: } else {
1010: $Apache::lonxml::counter=1;
1011: $Apache::lonxml::counter_changed=1;
1012: }
1013: }
1014:
1015: sub store_counter {
1016: &Apache::lonnet::appenv(('form.counter' => $Apache::lonxml::counter));
1017: $Apache::lonxml::counter_changed=0;
1018: return '';
1019: }
1020:
1021: {
1022: my $state;
1023: sub clear_problem_counter {
1024: undef($state);
1025: &Apache::lonnet::delenv('form.counter');
1026: &Apache::lonxml::init_counter();
1027: &Apache::lonxml::store_counter();
1028: }
1029:
1030: sub remember_problem_counter {
1031: &Apache::lonnet::transfer_profile_to_env(undef,undef,1);
1032: $state = $env{'form.counter'};
1033: }
1034:
1035: sub restore_problem_counter {
1036: if (defined($state)) {
1037: &Apache::lonnet::appenv(('form.counter' => $state));
1038: }
1039: }
1040: sub get_problem_counter {
1041: if ($Apache::lonxml::counter_changed) { &store_counter() }
1042: &Apache::lonnet::transfer_profile_to_env(undef,undef,1);
1043: return $env{'form.counter'};
1044: }
1045: }
1046:
1047: sub get_all_text {
1048: my($tag,$pars,$style)= @_;
1049: my $gotfullstack=1;
1050: if (ref($pars) ne 'ARRAY') {
1051: $gotfullstack=0;
1052: $pars=[$pars];
1053: }
1054: if (ref($style) ne 'HASH') {
1055: $style={};
1056: }
1057: my $depth=0;
1058: my $token;
1059: my $result='';
1060: if ( $tag =~ m:^/: ) {
1061: my $tag=substr($tag,1);
1062: #&Apache::lonxml::debug("have:$tag:");
1063: my $top_empty=0;
1064: while (($depth >=0) && ($#$pars > -1) && (!$top_empty)) {
1065: while (($depth >=0) && ($token = $$pars[-1]->get_token)) {
1066: #&Apache::lonxml::debug("e token:$token->[0]:$depth:$token->[1]:".$#$pars.":".$#Apache::lonxml::pwd);
1067: if (($token->[0] eq 'T')||($token->[0] eq 'C')||($token->[0] eq 'D')) {
1068: if ($token->[2]) {
1069: $result.='<![CDATA['.$token->[1].']]>';
1070: } else {
1071: $result.=$token->[1];
1072: }
1073: } elsif ($token->[0] eq 'PI') {
1074: $result.=$token->[2];
1075: } elsif ($token->[0] eq 'S') {
1076: if ($token->[1] =~ /^\Q$tag\E$/i) { $depth++; }
1077: if ($token->[1] =~ /^LONCAPA_INTERNAL_TURN_STYLE_ON$/) { $Apache::lonxml::usestyle=1; }
1078: if ($token->[1] =~ /^LONCAPA_INTERNAL_TURN_STYLE_OFF$/) { $Apache::lonxml::usestyle=0; }
1079: $result.=$token->[4];
1080: } elsif ($token->[0] eq 'E') {
1081: if ( $token->[1] =~ /^\Q$tag\E$/i) { $depth--; }
1082: #skip sending back the last end tag
1083: if ($depth == 0 && exists($$style{'/'.$token->[1]}) && $Apache::lonxml::usestyle) {
1084: my $string=
1085: '<LONCAPA_INTERNAL_TURN_STYLE_OFF end="yes" />'.
1086: $$style{'/'.$token->[1]}.
1087: $token->[2].
1088: '<LONCAPA_INTERNAL_TURN_STYLE_ON />';
1089: &Apache::lonxml::newparser($pars,\$string);
1090: #&Apache::lonxml::debug("reParsing $string");
1091: next;
1092: }
1093: if ($depth > -1) {
1094: $result.=$token->[2];
1095: } else {
1096: $$pars[-1]->unget_token($token);
1097: }
1098: }
1099: }
1100: if (($depth >=0) && ($#$pars == 0) ) { $top_empty=1; }
1101: if (($depth >=0) && ($#$pars > 0) ) {
1102: pop(@$pars);
1103: pop(@Apache::lonxml::pwd);
1104: }
1105: }
1106: if ($top_empty && $depth >= 0) {
1107: #never found the end tag ran out of text, throw error send back blank
1108: &error('Never found end tag for <'.$tag.
1109: '> current string <pre>'.
1110: &HTML::Entities::encode($result,'<>&"').
1111: '</pre>');
1112: if ($gotfullstack) {
1113: my $newstring='</'.$tag.'>'.$result;
1114: &Apache::lonxml::newparser($pars,\$newstring);
1115: }
1116: $result='';
1117: }
1118: } else {
1119: while ($#$pars > -1) {
1120: while ($token = $$pars[-1]->get_token) {
1121: #&Apache::lonxml::debug("s token:$token->[0]:$depth:$token->[1]");
1122: if (($token->[0] eq 'T')||($token->[0] eq 'C')||
1123: ($token->[0] eq 'D')) {
1124: if ($token->[2]) {
1125: $result.='<![CDATA['.$token->[1].']]>';
1126: } else {
1127: $result.=$token->[1];
1128: }
1129: } elsif ($token->[0] eq 'PI') {
1130: $result.=$token->[2];
1131: } elsif ($token->[0] eq 'S') {
1132: if ( $token->[1] =~ /^\Q$tag\E$/i) {
1133: $$pars[-1]->unget_token($token); last;
1134: } else {
1135: $result.=$token->[4];
1136: }
1137: if ($token->[1] =~ /^LONCAPA_INTERNAL_TURN_STYLE_ON$/) { $Apache::lonxml::usestyle=1; }
1138: if ($token->[1] =~ /^LONCAPA_INTERNAL_TURN_STYLE_OFF$/) { $Apache::lonxml::usestyle=0; }
1139: } elsif ($token->[0] eq 'E') {
1140: $result.=$token->[2];
1141: }
1142: }
1143: if (($#$pars > 0) ) {
1144: pop(@$pars);
1145: pop(@Apache::lonxml::pwd);
1146: } else { last; }
1147: }
1148: }
1149: #&Apache::lonxml::debug("Exit:$result:");
1150: return $result
1151: }
1152:
1153: sub newparser {
1154: my ($parser,$contentref,$dir) = @_;
1155: push (@$parser,HTML::LCParser->new($contentref));
1156: $$parser[-1]->xml_mode(1);
1157: $$parser[-1]->marked_sections(1);
1158: if ( $dir eq '' ) {
1159: push (@Apache::lonxml::pwd, $Apache::lonxml::pwd[$#Apache::lonxml::pwd]);
1160: } else {
1161: push (@Apache::lonxml::pwd, $dir);
1162: }
1163: }
1164:
1165: sub parstring {
1166: my ($token) = @_;
1167: my (@vars,@values);
1168: foreach my $attr (@{$token->[3]}) {
1169: if ($attr!~/\W/) {
1170: my $val=$token->[2]->{$attr};
1171: $val =~ s/([\%\@\\\"\'])/\\$1/g;
1172: $val =~ s/(\$[^\{a-zA-Z_])/\\$1/g;
1173: $val =~ s/(\$)$/\\$1/;
1174: #if ($val =~ m/^[\%\@]/) { $val="\\".$val; }
1175: push(@vars,"\$$attr");
1176: push(@values,"\"$val\"");
1177: }
1178: }
1179: my $var_init =
1180: (@vars) ? 'my ('.join(',',@vars).') = ('.join(',',@values).');'
1181: : '';
1182: return $var_init;
1183: }
1184:
1185: sub extlink {
1186: my ($res,$exact)=@_;
1187: if (!$exact) {
1188: $res=&Apache::lonnet::hreflocation($Apache::lonxml::pwd[-1],$res);
1189: }
1190: push(@Apache::lonxml::extlinks,$res)
1191: }
1192:
1193: sub writeallows {
1194: unless ($#extlinks>=0) { return; }
1195: my $thisurl = &Apache::lonnet::clutter(shift);
1196: if ($env{'httpref.'.$thisurl}) {
1197: $thisurl=$env{'httpref.'.$thisurl};
1198: }
1199: my $thisdir=$thisurl;
1200: $thisdir=~s/\/[^\/]+$//;
1201: my %httpref=();
1202: foreach (@extlinks) {
1203: $httpref{'httpref.'.
1204: &Apache::lonnet::hreflocation($thisdir,$_)}=$thisurl;
1205: }
1206: @extlinks=();
1207: &Apache::lonnet::appenv(%httpref);
1208: }
1209:
1210: sub register_ssi {
1211: my ($url,%form)=@_;
1212: push (@Apache::lonxml::ssi_info,{'url'=>$url,'form'=>\%form});
1213: return '';
1214: }
1215:
1216: sub do_registered_ssi {
1217: foreach my $info (@Apache::lonxml::ssi_info) {
1218: my %form=%{ $info->{'form'}};
1219: my $url=$info->{'url'};
1220: &Apache::lonnet::ssi($url,%form);
1221: }
1222: }
1223: #
1224: # Afterburner handles anchors, highlights and links
1225: #
1226: sub afterburn {
1227: my $result=shift;
1228: &Apache::loncommon::get_unprocessed_cgi($ENV{'QUERY_STRING'},
1229: ['highlight','anchor','link']);
1230: if ($env{'form.highlight'}) {
1231: foreach (split(/\,/,$env{'form.highlight'})) {
1232: my $anchorname=$_;
1233: my $matchthis=$anchorname;
1234: $matchthis=~s/\_+/\\s\+/g;
1235: $result=~s/(\Q$matchthis\E)/\<font color=\"red\"\>$1\<\/font\>/gs;
1236: }
1237: }
1238: if ($env{'form.link'}) {
1239: foreach (split(/\,/,$env{'form.link'})) {
1240: my ($anchorname,$linkurl)=split(/\>/,$_);
1241: my $matchthis=$anchorname;
1242: $matchthis=~s/\_+/\\s\+/g;
1243: $result=~s/(\Q$matchthis\E)/\<a href=\"$linkurl\"\>$1\<\/a\>/gs;
1244: }
1245: }
1246: if ($env{'form.anchor'}) {
1247: my $anchorname=$env{'form.anchor'};
1248: my $matchthis=$anchorname;
1249: $matchthis=~s/\_+/\\s\+/g;
1250: $result=~s/(\Q$matchthis\E)/\<a name=\"$anchorname\"\>$1\<\/a\>/s;
1251: $result.=(<<"ENDSCRIPT");
1252: <script type="text/javascript">
1253: document.location.hash='$anchorname';
1254: </script>
1255: ENDSCRIPT
1256: }
1257: return $result;
1258: }
1259:
1260: sub storefile {
1261: my ($file,$contents)=@_;
1262: &Apache::lonnet::correct_line_ends(\$contents);
1263: if (my $fh=Apache::File->new('>'.$file)) {
1264: print $fh $contents;
1265: $fh->close();
1266: return 1;
1267: } else {
1268: &warning("Unable to save file $file");
1269: return 0;
1270: }
1271: }
1272:
1273: sub createnewhtml {
1274: my $title=&mt('Title of document goes here');
1275: my $body=&mt('Body of document goes here');
1276: my $filecontents=(<<SIMPLECONTENT);
1277: <html>
1278: <head>
1279: <title>$title</title>
1280: </head>
1281: <body bgcolor="#FFFFFF">
1282: $body
1283: </body>
1284: </html>
1285: SIMPLECONTENT
1286: return $filecontents;
1287: }
1288:
1289: sub createnewsty {
1290: my $filecontents=(<<SIMPLECONTENT);
1291: <definetag name="">
1292: <render>
1293: <web></web>
1294: <tex></tex>
1295: </render>
1296: </definetag>
1297: SIMPLECONTENT
1298: return $filecontents;
1299: }
1300:
1301:
1302: sub inserteditinfo {
1303: my ($result,$filecontents,$filetype)=@_;
1304: $filecontents = &HTML::Entities::encode($filecontents,'<>&"');
1305: # my $editheader='<a href="#editsection">Edit below</a><hr />';
1306: my $xml_help = '';
1307: my $initialize='';
1308: if ($filetype eq 'html') {
1309: my $addbuttons=&Apache::lonhtmlcommon::htmlareaaddbuttons();
1310: $initialize=&Apache::lonhtmlcommon::spellheader();
1311: if (!&Apache::lonhtmlcommon::htmlareablocked() &&
1312: &Apache::lonhtmlcommon::htmlareabrowser()) {
1313: $initialize.=(<<FULLPAGE);
1314: <script type="text/javascript">
1315: $addbuttons
1316:
1317: HTMLArea.loadPlugin("FullPage");
1318:
1319: function initDocument() {
1320: var editor=new HTMLArea("filecont",config);
1321: editor.registerPlugin(FullPage);
1322: editor.generate();
1323: }
1324: </script>
1325: FULLPAGE
1326: } else {
1327: $initialize.=(<<FULLPAGE);
1328: <script type="text/javascript">
1329: $addbuttons
1330: function initDocument() {
1331: }
1332: </script>
1333: FULLPAGE
1334: }
1335: $result=~s/\<body([^\>]*)\>/\<body onload="initDocument()" $1\>/i;
1336: $xml_help=&Apache::loncommon::helpLatexCheatsheet();
1337: }
1338: my $cleanbut = '';
1339:
1340: my $titledisplay=&display_title();
1341: my %lt=&Apache::lonlocal::texthash('st' => 'Save and Edit',
1342: 'vi' => 'Save and View',
1343: 'dv' => 'Discard Edits and View',
1344: 'un' => 'undo',
1345: 'ed' => 'Edit');
1346: my $buttons=(<<BUTTONS);
1347: $cleanbut
1348: <input type="submit" name="discardview" accesskey="d" value="$lt{'dv'}" />
1349: <input type="submit" name="Undo" accesskey="u" value="$lt{'un'}" /><hr>
1350: <input type="submit" name="savethisfile" accesskey="s" value="$lt{'st'}" />
1351: <input type="submit" name="viewmode" accesskey="v" value="$lt{'vi'}" />
1352: BUTTONS
1353: $buttons.=&Apache::lonhtmlcommon::spelllink('xmledit','filecont');
1354: my $editfooter=(<<ENDFOOTER);
1355: $initialize
1356: <hr />
1357: <a name="editsection" />
1358: <form method="post" name="xmledit">
1359: $xml_help
1360: <input type="hidden" name="editmode" value="$lt{'ed'}" />
1361: $buttons<br />
1362: <textarea style="width:100%" cols="80" rows="44" name="filecont" id="filecont">$filecontents</textarea>
1363: <br />$buttons
1364: <br />
1365: </form>
1366: $titledisplay
1367: </body>
1368: ENDFOOTER
1369: # $result=~s/(\<body[^\>]*\>)/$1$editheader/is;
1370: $result=~s/(\<\/body\>)/$editfooter/is;
1371: return $result;
1372: }
1373:
1374: sub get_target {
1375: my $viewgrades=&Apache::lonnet::allowed('vgr',$env{'request.course.id'});
1376: if ( $env{'request.state'} eq 'published') {
1377: if ( defined($env{'form.grade_target'})
1378: && ($viewgrades == 'F' )) {
1379: return ($env{'form.grade_target'});
1380: } elsif (defined($env{'form.grade_target'})) {
1381: if (($env{'form.grade_target'} eq 'web') ||
1382: ($env{'form.grade_target'} eq 'tex') ) {
1383: return $env{'form.grade_target'}
1384: } else {
1385: return 'web';
1386: }
1387: } else {
1388: return 'web';
1389: }
1390: } elsif ($env{'request.state'} eq 'construct') {
1391: if ( defined($env{'form.grade_target'})) {
1392: return ($env{'form.grade_target'});
1393: } else {
1394: return 'web';
1395: }
1396: } else {
1397: return 'web';
1398: }
1399: }
1400:
1401: sub handler {
1402: my $request=shift;
1403:
1404: my $target=&get_target();
1405:
1406: $Apache::lonxml::debug=$env{'user.debug'};
1407:
1408: &Apache::loncommon::content_type($request,'text/html');
1409: &Apache::loncommon::no_cache($request);
1410: if ($env{'request.state'} eq 'published') {
1411: $request->set_last_modified(&Apache::lonnet::metadata($request->uri,
1412: 'lastrevisiondate'));
1413: }
1414: $request->send_http_header;
1415:
1416: return OK if $request->header_only;
1417:
1418:
1419: my $file=&Apache::lonnet::filelocation("",$request->uri);
1420: my $filetype;
1421: if ($file =~ /\.sty$/) {
1422: $filetype='sty';
1423: } else {
1424: $filetype='html';
1425: }
1426: #
1427: # Edit action? Save file.
1428: #
1429: if (!($env{'request.state'} eq 'published')) {
1430: if ($env{'form.savethisfile'} || $env{'form.viewmode'} || $env{'form.Undo'}) {
1431: my $html_file=&Apache::lonnet::getfile($file);
1432: my $error = &Apache::lonhomework::handle_save_or_undo($request, \$html_file, \$env{'form.filecont'});
1433: }
1434: }
1435: my %mystyle;
1436: my $result = '';
1437: my $filecontents=&Apache::lonnet::getfile($file);
1438: if ($filecontents eq -1) {
1439: my $start_page=&Apache::loncommon::start_page('File Error');
1440: my $end_page=&Apache::loncommon::end_page();
1441: my $fnf=&mt('File not found');
1442: $result=(<<ENDNOTFOUND);
1443: $start_page
1444: <b>$fnf: $file</b>
1445: $end_page
1446: ENDNOTFOUND
1447: $filecontents='';
1448: if ($env{'request.state'} ne 'published') {
1449: if ($filetype eq 'sty') {
1450: $filecontents=&createnewsty();
1451: } else {
1452: $filecontents=&createnewhtml();
1453: }
1454: $env{'form.editmode'}='Edit'; #force edit mode
1455: }
1456: } else {
1457: unless ($env{'request.state'} eq 'published') {
1458: if ($filecontents=~/BEGIN LON-CAPA Internal/) {
1459: &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.'));
1460: }
1461: #
1462: # we are in construction space, see if edit mode forced
1463: &Apache::loncommon::get_unprocessed_cgi($ENV{'QUERY_STRING'},
1464: ['editmode']);
1465: }
1466: &Apache::lonnet::logthis("edit mode is ".$env{'form.editmode'});
1467: if (!$env{'form.editmode'} || $env{'form.viewmode'} || $env{'form.discardview'}) {
1468: $result = &Apache::lonxml::xmlparse($request,$target,$filecontents,
1469: '',%mystyle);
1470: undef($Apache::lonhomework::parsing_a_task);
1471: &Apache::loncommon::get_unprocessed_cgi($ENV{'QUERY_STRING'},
1472: ['rawmode']);
1473: if ($env{'form.rawmode'}) { $result = $filecontents; }
1474: }
1475: }
1476:
1477: #
1478: # Edit action? Insert editing commands
1479: #
1480: unless ($env{'request.state'} eq 'published') {
1481: if ($env{'form.editmode'} && (!($env{'form.viewmode'})) && (!($env{'form.discardview'})))
1482: {
1483: my $displayfile=$request->uri;
1484: $displayfile=~s/^\/[^\/]*//;
1485: my %options = ();
1486: if ($env{'environment.remote'} ne 'off') {
1487: $options{'bgcolor'} = '#FFFFFF';
1488: }
1489: my $start_page = &Apache::loncommon::start_page(undef,undef,
1490: \%options);
1491: $result=$start_page.
1492: &Apache::lonxml::message_location().'<h3>'.
1493: $displayfile.
1494: '</h3>'.&Apache::loncommon::end_page();
1495: $result=&inserteditinfo($result,$filecontents,$filetype);
1496: }
1497: }
1498: if ($filetype eq 'html') { &writeallows($request->uri); }
1499:
1500:
1501: &Apache::lonxml::add_messages(\$result);
1502: $request->print($result);
1503:
1504: return OK;
1505: }
1506:
1507: sub display_title {
1508: my $result;
1509: if ($env{'request.state'} eq 'construct') {
1510: my $title=&Apache::lonnet::gettitle();
1511: if (!defined($title) || $title eq '') {
1512: $title = $env{'request.filename'};
1513: $title = substr($title, rindex($title, '/') + 1);
1514: }
1515: $result = "<script type='text/javascript'>top.document.title = '$title - LON-CAPA Construction Space';</script>";
1516: }
1517: return $result;
1518: }
1519:
1520: sub debug {
1521: if ($Apache::lonxml::debug eq "1") {
1522: $|=1;
1523: my $request=$Apache::lonxml::request;
1524: if (!$request) {
1525: eval { $request=Apache->request; };
1526: }
1527: if (!$request) {
1528: eval { $request=Apache2::RequestUtil->request; };
1529: }
1530: $request->print('<font size="-2"><pre>DEBUG:'.&HTML::Entities::encode($_[0],'<>&"')."</pre></font>\n");
1531: #&Apache::lonnet::logthis($_[0]);
1532: }
1533: }
1534:
1535: sub show_error_warn_msg {
1536: if ($env{'request.filename'} eq '/home/httpd/html/res/lib/templates/simpleproblem.problem' &&
1537: &Apache::lonnet::allowed('mdc',$env{'request.course.id'})) {
1538: return 1;
1539: }
1540: return (($Apache::lonxml::debug eq 1) ||
1541: ($env{'request.state'} eq 'construct') ||
1542: ($Apache::lonhomework::browse eq 'F'
1543: &&
1544: $env{'form.show_errors'} eq 'on'));
1545: }
1546:
1547: sub error {
1548: $errorcount++;
1549: if ( &show_error_warn_msg() ) {
1550: # If printing in construction space, put the error inside <pre></pre>
1551: push(@Apache::lonxml::error_messages,
1552: $Apache::lonxml::warnings_error_header.
1553: "<b>ERROR:</b>".join("<br />\n",@_)."<br />\n");
1554: $Apache::lonxml::warnings_error_header='';
1555: } else {
1556: my $errormsg;
1557: my ($symb)=&Apache::lonnet::symbread();
1558: if ( !$symb ) {
1559: #public or browsers
1560: $errormsg=&mt("An error occured while processing this resource. The author has been notified.");
1561: }
1562: my $host=$Apache::lonnet::perlvar{'lonHostID'};
1563: my $msg = join('<br />',(@_,"The error occurred on host <tt>$host</tt>"));
1564: #notify author
1565: &Apache::lonmsg::author_res_msg($env{'request.filename'},$msg);
1566: #notify course
1567: if ( $symb && $env{'request.course.id'} ) {
1568: my $cnum=$env{'course.'.$env{'request.course.id'}.'.num'};
1569: my $cdom=$env{'course.'.$env{'request.course.id'}.'.domain'};
1570: my (undef,%users)=&Apache::lonfeedback::decide_receiver(undef,0,1,1,1);
1571: my $declutter=&Apache::lonnet::declutter($env{'request.filename'});
1572: my @userlist;
1573: foreach (keys %users) {
1574: my ($user,$domain) = split(/:/, $_);
1575: push(@userlist,"$user\@$domain");
1576: my $key=$declutter.'_'.$user.'_'.$domain;
1577: my %lastnotified=&Apache::lonnet::get('nohist_xmlerrornotifications',
1578: [$key],
1579: $cdom,$cnum);
1580: my $now=time;
1581: if ($now-$lastnotified{$key}>86400) {
1582: &Apache::lonmsg::user_normal_msg($user,$domain,
1583: "Error [$declutter]",$msg);
1584: &Apache::lonnet::put('nohist_xmlerrornotifications',
1585: {$key => $now},
1586: $cdom,$cnum);
1587: }
1588: }
1589: if ($env{'request.role.adv'}) {
1590: $errormsg=&mt("An error occured while processing this resource. The course personnel ([_1]) and the author have been notified.",join(', ',@userlist));
1591: } else {
1592: $errormsg=&mt("An error occured while processing this resource. The instructor has been notified.");
1593: }
1594: }
1595: push(@Apache::lonxml::error_messages,"<b>$errormsg</b> <br />");
1596: }
1597: }
1598:
1599: sub warning {
1600: $warningcount++;
1601:
1602: if ($env{'form.grade_target'} ne 'tex') {
1603: if ( &show_error_warn_msg() ) {
1604: push(@Apache::lonxml::warning_messages,
1605: $Apache::lonxml::warnings_error_header.
1606: "<b>W</b>ARNING<b>:</b>".join('<br />',@_)."<br />\n");
1607: $Apache::lonxml::warnings_error_header='';
1608: }
1609: }
1610: }
1611:
1612: sub info {
1613: if ($env{'form.grade_target'} ne 'tex'
1614: && $env{'request.state'} eq 'construct') {
1615: push(@Apache::lonxml::info_messages,join('<br />',@_)."<br />\n");
1616: }
1617: }
1618:
1619: sub message_location {
1620: return '__LONCAPA_INTERNAL_MESSAGE_LOCATION__';
1621: }
1622:
1623: sub add_messages {
1624: my ($msg)=@_;
1625: my $result=join(' ',
1626: @Apache::lonxml::info_messages,
1627: @Apache::lonxml::error_messages,
1628: @Apache::lonxml::warning_messages);
1629: undef(@Apache::lonxml::info_messages);
1630: undef(@Apache::lonxml::error_messages);
1631: undef(@Apache::lonxml::warning_messages);
1632: $$msg=~s/__LONCAPA_INTERNAL_MESSAGE_LOCATION__/$result/;
1633: $$msg=~s/__LONCAPA_INTERNAL_MESSAGE_LOCATION__//g;
1634: }
1635:
1636: sub get_param {
1637: my ($param,$parstack,$safeeval,$context,$case_insensitive) = @_;
1638: if ( ! $context ) { $context = -1; }
1639: my $args ='';
1640: if ( $#$parstack > (-2-$context) ) { $args=$$parstack[$context]; }
1641: if ( ! $Apache::lonxml::usestyle ) {
1642: $args=$Apache::lonxml::style_values.$args;
1643: }
1644: if ( ! $args ) { return undef; }
1645: if ( $case_insensitive ) {
1646: if ($args =~ s/(my (?:.*))(\$\Q$param\E[,\)])/$1.lc($2)/ei) {
1647: return &Apache::run::run("{$args;".'return $'.$param.'}',
1648: $safeeval); #'
1649: } else {
1650: return undef;
1651: }
1652: } else {
1653: if ( $args =~ /my .*\$\Q$param\E[,\)]/ ) {
1654: return &Apache::run::run("{$args;".'return $'.$param.'}',
1655: $safeeval); #'
1656: } else {
1657: return undef;
1658: }
1659: }
1660: }
1661:
1662: sub get_param_var {
1663: my ($param,$parstack,$safeeval,$context,$case_insensitive) = @_;
1664: if ( ! $context ) { $context = -1; }
1665: my $args ='';
1666: if ( $#$parstack > (-2-$context) ) { $args=$$parstack[$context]; }
1667: if ( ! $Apache::lonxml::usestyle ) {
1668: $args=$Apache::lonxml::style_values.$args;
1669: }
1670: &Apache::lonxml::debug("Args are $args param is $param");
1671: if ($case_insensitive) {
1672: if (! ($args=~s/(my (?:.*))(\$\Q$param\E[,\)])/$1.lc($2)/ei)) {
1673: return undef;
1674: }
1675: } elsif ( $args !~ /my .*\$\Q$param\E[,\)]/ ) { return undef; }
1676: my $value=&Apache::run::run("{$args;".'return $'.$param.'}',$safeeval); #'
1677: &Apache::lonxml::debug("first run is $value");
1678: if ($value =~ /^[\$\@\%][a-zA-Z_]\w*$/) {
1679: &Apache::lonxml::debug("doing second");
1680: my @result=&Apache::run::run("return $value",$safeeval,1);
1681: if (!defined($result[0])) {
1682: return $value
1683: } else {
1684: if (wantarray) { return @result; } else { return $result[0]; }
1685: }
1686: } else {
1687: return $value;
1688: }
1689: }
1690:
1691: sub register_insert {
1692: my @data = split /\n/, &Apache::lonnet::getfile('/home/httpd/lonTabs/insertlist.tab');
1693: my $i;
1694: my $tagnum=0;
1695: my @order;
1696: for ($i=0;$i < $#data; $i++) {
1697: my $line = $data[$i];
1698: if ( $line =~ /^\#/ || $line =~ /^\s*\n/) { next; }
1699: if ( $line =~ /TABLE/ ) { last; }
1700: my ($tag,$descrip,$color,$function,$show,$helpfile,$helpdesc) = split(/,/, $line);
1701: if ($tag) {
1702: $insertlist{"$tagnum.tag"} = $tag;
1703: $insertlist{"$tagnum.description"} = $descrip;
1704: $insertlist{"$tagnum.color"} = $color;
1705: $insertlist{"$tagnum.function"} = $function;
1706: if (!defined($show)) { $show='yes'; }
1707: $insertlist{"$tagnum.show"}= $show;
1708: $insertlist{"$tagnum.helpfile"} = $helpfile;
1709: $insertlist{"$tagnum.helpdesc"} = $helpdesc;
1710: $insertlist{"$tag.num"}=$tagnum;
1711: $tagnum++;
1712: }
1713: }
1714: $i++; #skipping TABLE line
1715: $tagnum = 0;
1716: for (;$i < $#data;$i++) {
1717: my $line = $data[$i];
1718: my ($mnemonic,@which) = split(/ +/,$line);
1719: my $tag = $insertlist{"$tagnum.tag"};
1720: for (my $j=0;$j <=$#which;$j++) {
1721: if ( $which[$j] eq 'Y' ) {
1722: if ($insertlist{"$j.show"} ne 'no') {
1723: push(@{ $insertlist{"$tag.which"} },$j);
1724: }
1725: }
1726: }
1727: $tagnum++;
1728: }
1729: }
1730:
1731: sub description {
1732: my ($token)=@_;
1733: my $tagnum;
1734: my $tag=$token->[1];
1735: foreach my $namespace (reverse @Apache::lonxml::namespace) {
1736: my $testtag=$namespace.'::'.$tag;
1737: $tagnum=$insertlist{"$testtag.num"};
1738: if (defined($tagnum)) { last; }
1739: }
1740: if (!defined ($tagnum)) { $tagnum=$Apache::lonxml::insertlist{"$tag.num"}; }
1741: return $insertlist{$tagnum.'.description'};
1742: }
1743:
1744: # Returns a list containing the help file, and the description
1745: sub helpinfo {
1746: my ($token)=@_;
1747: my $tagnum;
1748: my $tag=$token->[1];
1749: foreach my $namespace (reverse @Apache::lonxml::namespace) {
1750: my $testtag=$namespace.'::'.$tag;
1751: $tagnum=$insertlist{"$testtag.num"};
1752: if (defined($tagnum)) { last; }
1753: }
1754: if (!defined ($tagnum)) { $tagnum=$Apache::lonxml::insertlist{"$tag.num"}; }
1755: return ($insertlist{$tagnum.'.helpfile'}, $insertlist{$tagnum.'.helpdesc'});
1756: }
1757:
1758: 1;
1759: __END__
1760:
1761:
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