1: # The LearningOnline Network with CAPA
2: # XML Parser Module
3: #
4: # $Id: lonxml.pm,v 1.430 2006/12/11 00:42:47 albertel Exp $
5: #
6: # Copyright Michigan State University Board of Trustees
7: #
8: # This file is part of the LearningOnline Network with CAPA (LON-CAPA).
9: #
10: # LON-CAPA is free software; you can redistribute it and/or modify
11: # it under the terms of the GNU General Public License as published by
12: # the Free Software Foundation; either version 2 of the License, or
13: # (at your option) any later version.
14: #
15: # LON-CAPA is distributed in the hope that it will be useful,
16: # but WITHOUT ANY WARRANTY; without even the implied warranty of
17: # MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
18: # GNU General Public License for more details.
19: #
20: # You should have received a copy of the GNU General Public License
21: # along with LON-CAPA; if not, write to the Free Software
22: # Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA 02111-1307 USA
23: #
24: # /home/httpd/html/adm/gpl.txt
25: #
26: # http://www.lon-capa.org/
27: #
28: # Copyright for TtHfunc and TtMfunc by Ian Hutchinson.
29: # TtHfunc and TtMfunc (the "Code") may be compiled and linked into
30: # binary executable programs or libraries distributed by the
31: # Michigan State University (the "Licensee"), but any binaries so
32: # distributed are hereby licensed only for use in the context
33: # of a program or computational system for which the Licensee is the
34: # primary author or distributor, and which performs substantial
35: # additional tasks beyond the translation of (La)TeX into HTML.
36: # The C source of the Code may not be distributed by the Licensee
37: # to any other parties under any circumstances.
38: #
39:
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::lonlocal;
92:
93: #================================================== Main subroutine: xmlparse
94: #debugging control, to turn on debugging modify the correct handler
95: $Apache::lonxml::debug=0;
96:
97: # keeps count of the number of warnings and errors generated in a parse
98: $warningcount=0;
99: $errorcount=0;
100:
101: #path to the directory containing the file currently being processed
102: @pwd=();
103:
104: #these two are used for capturing a subset of the output for later processing,
105: #don't touch them directly use &startredirection and &endredirection
106: @outputstack = ();
107: $redirection = 0;
108:
109: #controls wheter the <import> tag actually does
110: $import = 1;
111: @extlinks=();
112:
113: # meta mode is a bit weird only some output is to be turned off
114: #<output> tag turns metamode off (defined in londefdef.pm)
115: $metamode = 0;
116:
117: # turns on and of run::evaluate actually derefencing var refs
118: $evaluate = 1;
119:
120: # data structure for eidt mode, determines what tags can go into what other tags
121: %insertlist=();
122:
123: # stores the list of active tag namespaces
124: @namespace=();
125:
126: # a pointer the the Apache request object
127: $Apache::lonxml::request='';
128:
129: # a problem number counter, and check on ether it is used
130: $Apache::lonxml::counter=1;
131: $Apache::lonxml::counter_changed=0;
132:
133: #internal check on whether to look at style defs
134: $Apache::lonxml::usestyle=1;
135:
136: #locations used to store the parameter string for style substitutions
137: $Apache::lonxml::style_values='';
138: $Apache::lonxml::style_end_values='';
139:
140: #array of ssi calls that need to occur after we are done parsing
141: @Apache::lonxml::ssi_info=();
142:
143: #should we do the postag variable interpolation
144: $Apache::lonxml::post_evaluate=1;
145:
146: #a header message to emit in the case of any generated warning or errors
147: $Apache::lonxml::warnings_error_header='';
148:
149: # Control whether or not LaTeX symbols should be substituted for their
150: # \ style equivalents...this may be turned off e.g. in an verbatim
151: # environment.
152:
153: $Apache::lonxml::substitute_LaTeX_symbols = 1; # Starts out on.
154:
155: sub enable_LaTeX_substitutions {
156: $Apache::lonxml::substitute_LaTeX_symbols = 1;
157: }
158: sub disable_LaTeX_substitutions {
159: $Apache::lonxml::substitute_LaTeX_symbols = 0;
160: }
161:
162: sub xmlend {
163: my ($target,$parser)=@_;
164: my $mode='xml';
165: my $status='OPEN';
166: if ($Apache::lonhomework::parsing_a_problem ||
167: $Apache::lonhomework::parsing_a_task ) {
168: $mode='problem';
169: $status=$Apache::inputtags::status[-1];
170: }
171: my $discussion;
172: &Apache::loncommon::get_unprocessed_cgi($ENV{'QUERY_STRING'},
173: ['LONCAPA_INTERNAL_no_discussion']);
174: if (! exists($env{'form.LONCAPA_INTERNAL_no_discussion'}) ||
175: $env{'form.LONCAPA_INTERNAL_no_discussion'} ne 'true') {
176: $discussion=&Apache::lonfeedback::list_discussion($mode,$status);
177: }
178: if ($target eq 'tex') {
179: $discussion.='<tex>\keephidden{ENDOFPROBLEM}\vskip 0.5mm\noindent\makebox[\textwidth/$number_of_columns][b]{\hrulefill}\end{document}</tex>';
180: &Apache::lonxml::newparser($parser,\$discussion,'');
181: return '';
182: }
183:
184: return $discussion;
185: }
186:
187: sub tokeninputfield {
188: my $defhost=$Apache::lonnet::perlvar{'lonHostID'};
189: $defhost=~tr/a-z/A-Z/;
190: return (<<ENDINPUTFIELD)
191: <script type="text/javascript">
192: function updatetoken() {
193: var comp=new Array;
194: var barcode=unescape(document.tokeninput.barcode.value);
195: comp=barcode.split('*');
196: if (typeof(comp[0])!="undefined") {
197: document.tokeninput.codeone.value=comp[0];
198: }
199: if (typeof(comp[1])!="undefined") {
200: document.tokeninput.codetwo.value=comp[1];
201: }
202: if (typeof(comp[2])!="undefined") {
203: comp[2]=comp[2].toUpperCase();
204: document.tokeninput.codethree.value=comp[2];
205: }
206: document.tokeninput.barcode.value='';
207: }
208: </script>
209: <form method="post" name="tokeninput">
210: <table border="2" bgcolor="#FFFFBB">
211: <tr><th>DocID Checkin</th></tr>
212: <tr><td>
213: <table>
214: <tr>
215: <td>Scan in Barcode</td>
216: <td><input type="text" size="22" name="barcode"
217: onChange="updatetoken()"/></td>
218: </tr>
219: <tr><td><i>or</i> Type in DocID</td>
220: <td>
221: <input type="text" size="5" name="codeone" />
222: <b><font size="+2">*</font></b>
223: <input type="text" size="5" name="codetwo" />
224: <b><font size="+2">*</font></b>
225: <input type="text" size="10" name="codethree" value="$defhost"
226: onChange="this.value=this.value.toUpperCase()" />
227: </td></tr>
228: </table>
229: </td></tr>
230: <tr><td><input type="submit" value="Check in DocID" /></td></tr>
231: </table>
232: </form>
233: ENDINPUTFIELD
234: }
235:
236: sub maketoken {
237: my ($symb,$tuname,$tudom,$tcrsid)=@_;
238: unless ($symb) {
239: $symb=&Apache::lonnet::symbread();
240: }
241: unless ($tuname) {
242: $tuname=$env{'user.name'};
243: $tudom=$env{'user.domain'};
244: $tcrsid=$env{'request.course.id'};
245: }
246:
247: return &Apache::lonnet::checkout($symb,$tuname,$tudom,$tcrsid);
248: }
249:
250: sub printtokenheader {
251: my ($target,$token,$tsymb,$tcrsid,$tudom,$tuname)=@_;
252: unless ($token) { return ''; }
253:
254: my ($symb,$courseid,$domain,$name) = &Apache::lonnet::whichuser();
255: unless ($tsymb) {
256: $tsymb=$symb;
257: }
258: unless ($tuname) {
259: $tuname=$name;
260: $tudom=$domain;
261: $tcrsid=$courseid;
262: }
263:
264: my $plainname=&Apache::loncommon::plainname($tuname,$tudom);
265:
266: if ($target eq 'web') {
267: my %idhash=&Apache::lonnet::idrget($tudom,($tuname));
268: return
269: '<img align="right" src="/cgi-bin/barcode.png?encode='.$token.'" />'.
270: &mt('Checked out for').' '.$plainname.
271: '<br />'.&mt('User').': '.$tuname.' at '.$tudom.
272: '<br />'.&mt('ID').': '.$idhash{$tuname}.
273: '<br />'.&mt('CourseID').': '.$tcrsid.
274: '<br />'.&mt('Course').': '.$env{'course.'.$tcrsid.'.description'}.
275: '<br />'.&mt('DocID').': '.$token.
276: '<br />'.&mt('Time').': '.&Apache::lonlocal::locallocaltime().'<hr />';
277: } else {
278: return $token;
279: }
280: }
281:
282: sub printalltags {
283: my $temp;
284: foreach $temp (sort keys %Apache::lonxml::alltags) {
285: &Apache::lonxml::debug("$temp -- ".
286: join(',',@{ $Apache::lonxml::alltags{$temp} }));
287: }
288: }
289:
290: sub xmlparse {
291: my ($request,$target,$content_file_string,$safeinit,%style_for_target) = @_;
292:
293: &setup_globals($request,$target);
294: &Apache::inputtags::initialize_inputtags();
295: &Apache::bridgetask::initialize_bridgetask();
296: &Apache::outputtags::initialize_outputtags();
297: &Apache::edit::initialize_edit();
298: &Apache::londefdef::initialize_londefdef();
299:
300: #
301: # do we have a course style file?
302: #
303:
304: if ($env{'request.course.id'} && $env{'request.state'} ne 'construct') {
305: my $bodytext=
306: $env{'course.'.$env{'request.course.id'}.'.default_xml_style'};
307: if ($bodytext) {
308: foreach my $file (split(',',$bodytext)) {
309: my $location=&Apache::lonnet::filelocation('',$file);
310: my $styletext=&Apache::lonnet::getfile($location);
311: if ($styletext ne '-1') {
312: %style_for_target = (%style_for_target,
313: &Apache::style::styleparser($target,$styletext));
314: }
315: }
316: }
317: } elsif ($env{'construct.style'} && ($env{'request.state'} eq 'construct')) {
318: my $location=&Apache::lonnet::filelocation('',$env{'construct.style'});
319: my $styletext=&Apache::lonnet::getfile($location);
320: if ($styletext ne '-1') {
321: %style_for_target = (%style_for_target,
322: &Apache::style::styleparser($target,$styletext));
323: }
324: }
325: #&printalltags();
326: my @pars = ();
327: my $pwd=$env{'request.filename'};
328: $pwd =~ s:/[^/]*$::;
329: &newparser(\@pars,\$content_file_string,$pwd);
330:
331: my $safeeval = new Safe;
332: my $safehole = new Safe::Hole;
333: &init_safespace($target,$safeeval,$safehole,$safeinit);
334: #-------------------- Redefinition of the target in the case of compound target
335:
336: ($target, my @tenta) = split('&&',$target);
337:
338: my @stack = ();
339: my @parstack = ();
340: &initdepth();
341: &init_alarm();
342: my $finaloutput = &inner_xmlparse($target,\@stack,\@parstack,\@pars,
343: $safeeval,\%style_for_target,1);
344:
345: if (@stack) {
346: &warning("At end of file some tags were still left unclosed, ".
347: '<tt><'.join('></tt>, <tt><',reverse(@stack)).
348: '></tt>');
349: }
350: if ($env{'request.uri'}) {
351: &writeallows($env{'request.uri'});
352: }
353: &do_registered_ssi();
354: if ($Apache::lonxml::counter_changed) { &store_counter() }
355:
356: &clean_safespace($safeeval);
357:
358: if ($env{'form.return_only_error_and_warning_counts'}) {
359: return "$errorcount:$warningcount";
360: }
361: return $finaloutput;
362: }
363:
364: sub latex_special_symbols {
365: my ($string,$where)=@_;
366: #
367: # If e.g. in verbatim mode, then don't substitute.
368: # but return original string.
369: #
370: if (!($Apache::lonxml::substitute_LaTeX_symbols)) {
371: return $string;
372: }
373: if ($where eq 'header') {
374: $string =~ s/\\/\$\\backslash\$/g; # \ -> $\backslash$ per LaTex line by line pg 10.
375: $string =~ s/(\$|%|\{|\})/\\$1/g;
376: $string=&Apache::lonprintout::character_chart($string);
377: # any & or # leftover should be safe to just escape
378: $string=~s/([^\\])\&/$1\\\&/g;
379: $string=~s/([^\\])\#/$1\\\#/g;
380: $string =~ s/_/\\_/g; # _ -> \_
381: $string =~ s/\^/\\\^{}/g; # ^ -> \^{}
382: } else {
383: $string=~s/\\/\\ensuremath{\\backslash}/g;
384: $string=~s/\\\%|\%/\\\%/g;
385: $string=~s/\\{|{/\\{/g;
386: $string=~s/\\}|}/\\}/g;
387: $string=~s/\\ensuremath\\{\\backslash\\}/\\ensuremath{\\backslash}/g;
388: $string=~s/\\\$|\$/\\\$/g;
389: $string=~s/\\\_|\_/\\\_/g;
390: $string=~s/([^\\]|^)(\~|\^)/$1\\$2\\strut /g;
391: $string=~s/(>|<)/\\ensuremath\{$1\}/g; #more or less
392: $string=&Apache::lonprintout::character_chart($string);
393: # any & or # leftover should be safe to just escape
394: $string=~s/\\\&|\&/\\\&/g;
395: $string=~s/\\\#|\#/\\\#/g;
396: $string=~s/\|/\$\\mid\$/g;
397: #single { or } How to escape?
398: }
399: return $string;
400: }
401:
402: sub inner_xmlparse {
403: my ($target,$stack,$parstack,$pars,$safeeval,$style_for_target,$start)=@_;
404: my $finaloutput = '';
405: my $result;
406: my $token;
407: my $dontpop=0;
408: my $startredirection = $Apache::lonxml::redirection;
409: while ( $#$pars > -1 ) {
410: while ($token = $$pars['-1']->get_token) {
411: if (($token->[0] eq 'T') || ($token->[0] eq 'C') ) {
412: if ($metamode<1) {
413: my $text=$token->[1];
414: if ($token->[0] eq 'C' && $target eq 'tex') {
415: $text = '';
416: # $text = '%'.$text."\n";
417: }
418: $result.=$text;
419: }
420: } elsif (($token->[0] eq 'D')) {
421: if ($metamode<1 && $target eq 'web') {
422: my $text=$token->[1];
423: $result.=$text;
424: }
425: } elsif ($token->[0] eq 'PI') {
426: if ($metamode<1 && $target eq 'web') {
427: $result=$token->[2];
428: }
429: } elsif ($token->[0] eq 'S') {
430: # add tag to stack
431: push (@$stack,$token->[1]);
432: # add parameters list to another stack
433: push (@$parstack,&parstring($token));
434: &increasedepth($token);
435: if ($Apache::lonxml::usestyle &&
436: exists($$style_for_target{$token->[1]})) {
437: $Apache::lonxml::usestyle=0;
438: my $string=$$style_for_target{$token->[1]}.
439: '<LONCAPA_INTERNAL_TURN_STYLE_ON />';
440: &Apache::lonxml::newparser($pars,\$string);
441: $Apache::lonxml::style_values=$$parstack[-1];
442: $Apache::lonxml::style_end_values=$$parstack[-1];
443: } else {
444: $result = &callsub("start_$token->[1]", $target, $token, $stack,
445: $parstack, $pars, $safeeval, $style_for_target);
446: }
447: } elsif ($token->[0] eq 'E') {
448: if ($Apache::lonxml::usestyle &&
449: exists($$style_for_target{'/'."$token->[1]"})) {
450: $Apache::lonxml::usestyle=0;
451: my $string=$$style_for_target{'/'.$token->[1]}.
452: '<LONCAPA_INTERNAL_TURN_STYLE_ON end="'.$token->[1].'" />';
453: &Apache::lonxml::newparser($pars,\$string);
454: $Apache::lonxml::style_values=$Apache::lonxml::style_end_values;
455: $Apache::lonxml::style_end_values='';
456: $dontpop=1;
457: } else {
458: #clear out any tags that didn't end
459: while ($token->[1] ne $$stack['-1'] && ($#$stack > -1)) {
460: my $lasttag=$$stack[-1];
461: if ($token->[1] =~ /^\Q$lasttag\E$/i) {
462: &Apache::lonxml::warning('Using tag </'.$token->[1].'> on line '.$token->[3].' as end tag to <'.$$stack[-1].'>');
463: last;
464: } else {
465: &Apache::lonxml::warning('Found tag </'.$token->[1].'> on line '.$token->[3].' when looking for </'.$$stack[-1].'> in file');
466: &end_tag($stack,$parstack,$token);
467: }
468: }
469: $result = &callsub("end_$token->[1]", $target, $token, $stack,
470: $parstack, $pars,$safeeval, $style_for_target);
471: }
472: } else {
473: &Apache::lonxml::error("Unknown token event :$token->[0]:$token->[1]:");
474: }
475: #evaluate variable refs in result
476: if ($Apache::lonxml::post_evaluate &&$result ne "") {
477: my $extras;
478: if (!$Apache::lonxml::usestyle) {
479: $extras=$Apache::lonxml::style_values;
480: }
481: if ( $#$parstack > -1 ) {
482: $result=&Apache::run::evaluate($result,$safeeval,$extras.$$parstack[-1]);
483: } else {
484: $result= &Apache::run::evaluate($result,$safeeval,$extras);
485: }
486: }
487: $Apache::lonxml::post_evaluate=1;
488:
489: if (($token->[0] eq 'T') || ($token->[0] eq 'C') || ($token->[0] eq 'D') ) {
490: #Style file definitions should be correct
491: if ($target eq 'tex' && ($Apache::lonxml::usestyle)) {
492: $result=&latex_special_symbols($result);
493: }
494: }
495:
496: if ($Apache::lonxml::redirection) {
497: $Apache::lonxml::outputstack['-1'] .= $result;
498: } else {
499: $finaloutput.=$result;
500: }
501: $result = '';
502:
503: if ($token->[0] eq 'E' && !$dontpop) {
504: &end_tag($stack,$parstack,$token);
505: }
506: $dontpop=0;
507: }
508: if ($#$pars > -1) {
509: pop @$pars;
510: pop @Apache::lonxml::pwd;
511: }
512: }
513:
514: # if ($target eq 'meta') {
515: # $finaloutput.=&endredirection;
516: # }
517:
518: if ( $start && $target eq 'grade') { &endredirection(); }
519: if ( $Apache::lonxml::redirection > $startredirection) {
520: while ($Apache::lonxml::redirection > $startredirection) {
521: $finaloutput .= &endredirection();
522: }
523: }
524: if (($ENV{'QUERY_STRING'}) && ($target eq 'web')) {
525: $finaloutput=&afterburn($finaloutput);
526: }
527: return $finaloutput;
528: }
529:
530: ##
531: ## Looks to see if there is a subroutine defined for this tag. If so, call it,
532: ## otherwise do not call it as we do not know what it is.
533: ##
534: sub callsub {
535: my ($sub,$target,$token,$tagstack,$parstack,$parser,$safeeval,$style)=@_;
536: my $currentstring='';
537: my $nodefault;
538: {
539: my $sub1;
540: no strict 'refs';
541: my $tag=$token->[1];
542: # get utterly rid of extended html tags
543: if ($tag=~/^x\-/i) { return ''; }
544: my $space=$Apache::lonxml::alltags{$tag}[-1];
545: if (!$space) {
546: $tag=~tr/A-Z/a-z/;
547: $sub=~tr/A-Z/a-z/;
548: $space=$Apache::lonxml::alltags{$tag}[-1]
549: }
550:
551: my $deleted=0;
552: $Apache::lonxml::curdepth=join('_',@Apache::lonxml::depthcounter);
553: if (($token->[0] eq 'S') && ($target eq 'modified')) {
554: $deleted=&Apache::edit::handle_delete($space,$target,$token,$tagstack,
555: $parstack,$parser,$safeeval,
556: $style);
557: }
558: if (!$deleted) {
559: if ($space) {
560: #&Apache::lonxml::debug("Calling sub $sub in $space $metamode");
561: $sub1="$space\:\:$sub";
562: ($currentstring,$nodefault) = &$sub1($target,$token,$tagstack,
563: $parstack,$parser,$safeeval,
564: $style);
565: } else {
566: if ($target eq 'tex') {
567: # throw away tag name
568: return '';
569: }
570: #&Apache::lonxml::debug("NOT Calling sub $sub in $space $metamode");
571: if ($metamode <1) {
572: if (defined($token->[4]) && ($metamode < 1)) {
573: $currentstring = $token->[4];
574: } else {
575: $currentstring = $token->[2];
576: }
577: }
578: }
579: # &Apache::lonxml::debug("nodefalt:$nodefault:");
580: if ($currentstring eq '' && $nodefault eq '') {
581: if ($target eq 'edit') {
582: #&Apache::lonxml::debug("doing default edit for $token->[1]");
583: if ($token->[0] eq 'S') {
584: $currentstring = &Apache::edit::tag_start($target,$token);
585: } elsif ($token->[0] eq 'E') {
586: $currentstring = &Apache::edit::tag_end($target,$token);
587: }
588: } elsif ($target eq 'modified') {
589: if ($token->[0] eq 'S') {
590: $currentstring = $token->[4];
591: $currentstring.=&Apache::edit::handle_insert();
592: } elsif ($token->[0] eq 'E') {
593: $currentstring = $token->[2];
594: $currentstring.=&Apache::edit::handle_insertafter($token->[1]);
595: } else {
596: $currentstring = $token->[2];
597: }
598: }
599: }
600: }
601: use strict 'refs';
602: }
603: return $currentstring;
604: }
605:
606: sub setup_globals {
607: my ($request,$target)=@_;
608: $Apache::lonxml::request=$request;
609: $errorcount=0;
610: $warningcount=0;
611: $Apache::lonxml::default_homework_loaded=0;
612: $Apache::lonxml::usestyle=1;
613: &init_counter();
614: @Apache::lonxml::pwd=();
615: @Apache::lonxml::extlinks=();
616: @Apache::lonxml::ssi_info=();
617: $Apache::lonxml::post_evaluate=1;
618: $Apache::lonxml::warnings_error_header='';
619: $Apache::lonxml::substitute_LaTeX_symbols = 1;
620: if ($target eq 'meta') {
621: $Apache::lonxml::redirection = 0;
622: $Apache::lonxml::metamode = 1;
623: $Apache::lonxml::evaluate = 1;
624: $Apache::lonxml::import = 0;
625: } elsif ($target eq 'answer') {
626: $Apache::lonxml::redirection = 0;
627: $Apache::lonxml::metamode = 1;
628: $Apache::lonxml::evaluate = 1;
629: $Apache::lonxml::import = 1;
630: } elsif ($target eq 'grade') {
631: &startredirection(); #ended in inner_xmlparse on exit
632: $Apache::lonxml::metamode = 0;
633: $Apache::lonxml::evaluate = 1;
634: $Apache::lonxml::import = 1;
635: } elsif ($target eq 'modified') {
636: $Apache::lonxml::redirection = 0;
637: $Apache::lonxml::metamode = 0;
638: $Apache::lonxml::evaluate = 0;
639: $Apache::lonxml::import = 0;
640: } elsif ($target eq 'edit') {
641: $Apache::lonxml::redirection = 0;
642: $Apache::lonxml::metamode = 0;
643: $Apache::lonxml::evaluate = 0;
644: $Apache::lonxml::import = 0;
645: } elsif ($target eq 'analyze') {
646: $Apache::lonxml::redirection = 0;
647: $Apache::lonxml::metamode = 0;
648: $Apache::lonxml::evaluate = 1;
649: $Apache::lonxml::import = 1;
650: } else {
651: $Apache::lonxml::redirection = 0;
652: $Apache::lonxml::metamode = 0;
653: $Apache::lonxml::evaluate = 1;
654: $Apache::lonxml::import = 1;
655: }
656: }
657:
658: sub init_safespace {
659: my ($target,$safeeval,$safehole,$safeinit) = @_;
660: $safeeval->deny_only(':dangerous');
661: $safeeval->reval('use Math::Complex;');
662: $safeeval->permit_only(":default");
663: $safeeval->permit("entereval");
664: $safeeval->permit(":base_math");
665: $safeeval->permit("sort");
666: $safeeval->permit("time");
667: $safeeval->deny("rand");
668: $safeeval->deny("srand");
669: $safeeval->deny(":base_io");
670: $safehole->wrap(\&Apache::scripttag::xmlparse,$safeeval,'&xmlparse');
671: $safehole->wrap(\&Apache::outputtags::multipart,$safeeval,'&multipart');
672: $safehole->wrap(\&Apache::lonnet::EXT,$safeeval,'&EXT');
673: $safehole->wrap(\&Apache::chemresponse::chem_standard_order,$safeeval,
674: '&chem_standard_order');
675: $safehole->wrap(\&Apache::response::check_status,$safeeval,'&check_status');
676:
677: $safehole->wrap(\&Math::Cephes::asin,$safeeval,'&asin');
678: $safehole->wrap(\&Math::Cephes::acos,$safeeval,'&acos');
679: $safehole->wrap(\&Math::Cephes::atan,$safeeval,'&atan');
680: $safehole->wrap(\&Math::Cephes::sinh,$safeeval,'&sinh');
681: $safehole->wrap(\&Math::Cephes::cosh,$safeeval,'&cosh');
682: $safehole->wrap(\&Math::Cephes::tanh,$safeeval,'&tanh');
683: $safehole->wrap(\&Math::Cephes::asinh,$safeeval,'&asinh');
684: $safehole->wrap(\&Math::Cephes::acosh,$safeeval,'&acosh');
685: $safehole->wrap(\&Math::Cephes::atanh,$safeeval,'&atanh');
686: $safehole->wrap(\&Math::Cephes::erf,$safeeval,'&erf');
687: $safehole->wrap(\&Math::Cephes::erfc,$safeeval,'&erfc');
688: $safehole->wrap(\&Math::Cephes::j0,$safeeval,'&j0');
689: $safehole->wrap(\&Math::Cephes::j1,$safeeval,'&j1');
690: $safehole->wrap(\&Math::Cephes::jn,$safeeval,'&jn');
691: $safehole->wrap(\&Math::Cephes::jv,$safeeval,'&jv');
692: $safehole->wrap(\&Math::Cephes::y0,$safeeval,'&y0');
693: $safehole->wrap(\&Math::Cephes::y1,$safeeval,'&y1');
694: $safehole->wrap(\&Math::Cephes::yn,$safeeval,'&yn');
695: $safehole->wrap(\&Math::Cephes::yv,$safeeval,'&yv');
696:
697: $safehole->wrap(\&Math::Cephes::bdtr ,$safeeval,'&bdtr' );
698: $safehole->wrap(\&Math::Cephes::bdtrc ,$safeeval,'&bdtrc' );
699: $safehole->wrap(\&Math::Cephes::bdtri ,$safeeval,'&bdtri' );
700: $safehole->wrap(\&Math::Cephes::btdtr ,$safeeval,'&btdtr' );
701: $safehole->wrap(\&Math::Cephes::chdtr ,$safeeval,'&chdtr' );
702: $safehole->wrap(\&Math::Cephes::chdtrc,$safeeval,'&chdtrc');
703: $safehole->wrap(\&Math::Cephes::chdtri,$safeeval,'&chdtri');
704: $safehole->wrap(\&Math::Cephes::fdtr ,$safeeval,'&fdtr' );
705: $safehole->wrap(\&Math::Cephes::fdtrc ,$safeeval,'&fdtrc' );
706: $safehole->wrap(\&Math::Cephes::fdtri ,$safeeval,'&fdtri' );
707: $safehole->wrap(\&Math::Cephes::gdtr ,$safeeval,'&gdtr' );
708: $safehole->wrap(\&Math::Cephes::gdtrc ,$safeeval,'&gdtrc' );
709: $safehole->wrap(\&Math::Cephes::nbdtr ,$safeeval,'&nbdtr' );
710: $safehole->wrap(\&Math::Cephes::nbdtrc,$safeeval,'&nbdtrc');
711: $safehole->wrap(\&Math::Cephes::nbdtri,$safeeval,'&nbdtri');
712: $safehole->wrap(\&Math::Cephes::ndtr ,$safeeval,'&ndtr' );
713: $safehole->wrap(\&Math::Cephes::ndtri ,$safeeval,'&ndtri' );
714: $safehole->wrap(\&Math::Cephes::pdtr ,$safeeval,'&pdtr' );
715: $safehole->wrap(\&Math::Cephes::pdtrc ,$safeeval,'&pdtrc' );
716: $safehole->wrap(\&Math::Cephes::pdtri ,$safeeval,'&pdtri' );
717: $safehole->wrap(\&Math::Cephes::stdtr ,$safeeval,'&stdtr' );
718: $safehole->wrap(\&Math::Cephes::stdtri,$safeeval,'&stdtri');
719:
720: $safehole->wrap(\&Math::Cephes::Matrix::mat,$safeeval,'&mat');
721: $safehole->wrap(\&Math::Cephes::Matrix::new,$safeeval,
722: '&Math::Cephes::Matrix::new');
723: $safehole->wrap(\&Math::Cephes::Matrix::coef,$safeeval,
724: '&Math::Cephes::Matrix::coef');
725: $safehole->wrap(\&Math::Cephes::Matrix::clr,$safeeval,
726: '&Math::Cephes::Matrix::clr');
727: $safehole->wrap(\&Math::Cephes::Matrix::add,$safeeval,
728: '&Math::Cephes::Matrix::add');
729: $safehole->wrap(\&Math::Cephes::Matrix::sub,$safeeval,
730: '&Math::Cephes::Matrix::sub');
731: $safehole->wrap(\&Math::Cephes::Matrix::mul,$safeeval,
732: '&Math::Cephes::Matrix::mul');
733: $safehole->wrap(\&Math::Cephes::Matrix::div,$safeeval,
734: '&Math::Cephes::Matrix::div');
735: $safehole->wrap(\&Math::Cephes::Matrix::inv,$safeeval,
736: '&Math::Cephes::Matrix::inv');
737: $safehole->wrap(\&Math::Cephes::Matrix::transp,$safeeval,
738: '&Math::Cephes::Matrix::transp');
739: $safehole->wrap(\&Math::Cephes::Matrix::simq,$safeeval,
740: '&Math::Cephes::Matrix::simq');
741: $safehole->wrap(\&Math::Cephes::Matrix::mat_to_vec,$safeeval,
742: '&Math::Cephes::Matrix::mat_to_vec');
743: $safehole->wrap(\&Math::Cephes::Matrix::vec_to_mat,$safeeval,
744: '&Math::Cephes::Matrix::vec_to_mat');
745: $safehole->wrap(\&Math::Cephes::Matrix::check,$safeeval,
746: '&Math::Cephes::Matrix::check');
747: $safehole->wrap(\&Math::Cephes::Matrix::check,$safeeval,
748: '&Math::Cephes::Matrix::check');
749:
750: # $safehole->wrap(\&Math::Cephes::new_fract,$safeeval,'&new_fract');
751: # $safehole->wrap(\&Math::Cephes::radd,$safeeval,'&radd');
752: # $safehole->wrap(\&Math::Cephes::rsub,$safeeval,'&rsub');
753: # $safehole->wrap(\&Math::Cephes::rmul,$safeeval,'&rmul');
754: # $safehole->wrap(\&Math::Cephes::rdiv,$safeeval,'&rdiv');
755: # $safehole->wrap(\&Math::Cephes::euclid,$safeeval,'&euclid');
756:
757: $safehole->wrap(\&Math::Random::random_beta,$safeeval,'&math_random_beta');
758: $safehole->wrap(\&Math::Random::random_chi_square,$safeeval,'&math_random_chi_square');
759: $safehole->wrap(\&Math::Random::random_exponential,$safeeval,'&math_random_exponential');
760: $safehole->wrap(\&Math::Random::random_f,$safeeval,'&math_random_f');
761: $safehole->wrap(\&Math::Random::random_gamma,$safeeval,'&math_random_gamma');
762: $safehole->wrap(\&Math::Random::random_multivariate_normal,$safeeval,'&math_random_multivariate_normal');
763: $safehole->wrap(\&Math::Random::random_multinomial,$safeeval,'&math_random_multinomial');
764: $safehole->wrap(\&Math::Random::random_noncentral_chi_square,$safeeval,'&math_random_noncentral_chi_square');
765: $safehole->wrap(\&Math::Random::random_noncentral_f,$safeeval,'&math_random_noncentral_f');
766: $safehole->wrap(\&Math::Random::random_normal,$safeeval,'&math_random_normal');
767: $safehole->wrap(\&Math::Random::random_permutation,$safeeval,'&math_random_permutation');
768: $safehole->wrap(\&Math::Random::random_permuted_index,$safeeval,'&math_random_permuted_index');
769: $safehole->wrap(\&Math::Random::random_uniform,$safeeval,'&math_random_uniform');
770: $safehole->wrap(\&Math::Random::random_poisson,$safeeval,'&math_random_poisson');
771: $safehole->wrap(\&Math::Random::random_uniform_integer,$safeeval,'&math_random_uniform_integer');
772: $safehole->wrap(\&Math::Random::random_negative_binomial,$safeeval,'&math_random_negative_binomial');
773: $safehole->wrap(\&Math::Random::random_binomial,$safeeval,'&math_random_binomial');
774: $safehole->wrap(\&Math::Random::random_seed_from_phrase,$safeeval,'&random_seed_from_phrase');
775: $safehole->wrap(\&Math::Random::random_set_seed_from_phrase,$safeeval,'&random_set_seed_from_phrase');
776: $safehole->wrap(\&Math::Random::random_get_seed,$safeeval,'&random_get_seed');
777: $safehole->wrap(\&Math::Random::random_set_seed,$safeeval,'&random_set_seed');
778: $safehole->wrap(\&Apache::lonxml::error,$safeeval,'&LONCAPA_INTERNAL_ERROR');
779: $safehole->wrap(\&Apache::lonxml::debug,$safeeval,'&LONCAPA_INTERNAL_DEBUG');
780: $safehole->wrap(\&Apache::lonnet::logthis,$safeeval,'&LONCAPA_INTERNAL_LOGTHIS');
781: $safehole->wrap(\&Apache::inputtags::finalizeawards,$safeeval,'&LONCAPA_INTERNAL_FINALIZEAWARDS');
782: $safehole->wrap(\&Apache::caparesponse::get_sigrange,$safeeval,'&LONCAPA_INTERNAL_get_sigrange');
783: # use Data::Dumper;
784: # $safehole->wrap(\&Data::Dumper::Dumper,$safeeval,'&LONCAPA_INTERNAL_Dumper');
785: #need to inspect this class of ops
786: # $safeeval->deny(":base_orig");
787: $safeeval->permit("require");
788: $safeinit .= ';$external::target="'.$target.'";';
789: &Apache::run::run($safeinit,$safeeval);
790: &initialize_rndseed($safeeval);
791: }
792:
793: sub clean_safespace {
794: my ($safeeval) = @_;
795: delete_package_recurse($safeeval->{Root});
796: }
797:
798: sub delete_package_recurse {
799: my ($package) = @_;
800: my @subp;
801: {
802: no strict 'refs';
803: while (my ($key,$val) = each(%{*{"$package\::"}})) {
804: if (!defined($val)) { next; }
805: local (*ENTRY) = $val;
806: if (defined *ENTRY{HASH} && $key =~ /::$/ &&
807: $key ne "main::" && $key ne "<none>::")
808: {
809: my ($p) = $package ne "main" ? "$package\::" : "";
810: ($p .= $key) =~ s/::$//;
811: push(@subp,$p);
812: }
813: }
814: }
815: foreach my $p (@subp) {
816: delete_package_recurse($p);
817: }
818: Symbol::delete_package($package);
819: }
820:
821: sub initialize_rndseed {
822: my ($safeeval)=@_;
823: my $rndseed;
824: my ($symb,$courseid,$domain,$name) = &Apache::lonnet::whichuser();
825: $rndseed=&Apache::lonnet::rndseed($symb,$courseid,$domain,$name);
826: my $safeinit = '$external::randomseed="'.$rndseed.'";';
827: &Apache::lonxml::debug("Setting rndseed to $rndseed");
828: &Apache::run::run($safeinit,$safeeval);
829: }
830:
831: sub default_homework_load {
832: my ($safeeval)=@_;
833: &Apache::lonxml::debug('Loading default_homework');
834: my $default=&Apache::lonnet::getfile('/home/httpd/html/res/adm/includes/default_homework.lcpm');
835: if ($default eq -1) {
836: &Apache::lonxml::error("<b>Unable to find <i>default_homework.lcpm</i></b>");
837: } else {
838: &Apache::run::run($default,$safeeval);
839: $Apache::lonxml::default_homework_loaded=1;
840: }
841: }
842:
843: {
844: my $alarm_depth;
845: sub init_alarm {
846: alarm(0);
847: $alarm_depth=0;
848: }
849:
850: sub start_alarm {
851: if ($alarm_depth<1) {
852: my $old=alarm($Apache::lonnet::perlvar{'lonScriptTimeout'});
853: if ($old) {
854: &Apache::lonxml::error("Cancelled an alarm of $old, this shouldn't occur.");
855: }
856: }
857: $alarm_depth++;
858: }
859:
860: sub end_alarm {
861: $alarm_depth--;
862: if ($alarm_depth<1) { alarm(0); }
863: }
864: }
865: my $metamode_was;
866: sub startredirection {
867: if (!$Apache::lonxml::redirection) {
868: $metamode_was=$Apache::lonxml::metamode;
869: }
870: $Apache::lonxml::metamode=0;
871: $Apache::lonxml::redirection++;
872: push (@Apache::lonxml::outputstack, '');
873: }
874:
875: sub endredirection {
876: if (!$Apache::lonxml::redirection) {
877: &Apache::lonxml::error("Endredirection was called before a startredirection, perhaps you have unbalanced tags. Some debugging information:".join ":",caller);
878: return '';
879: }
880: $Apache::lonxml::redirection--;
881: if (!$Apache::lonxml::redirection) {
882: $Apache::lonxml::metamode=$metamode_was;
883: }
884: pop @Apache::lonxml::outputstack;
885: }
886:
887: sub end_tag {
888: my ($tagstack,$parstack,$token)=@_;
889: pop(@$tagstack);
890: pop(@$parstack);
891: &decreasedepth($token);
892: }
893:
894: sub initdepth {
895: @Apache::lonxml::depthcounter=();
896: $Apache::lonxml::depth=-1;
897: $Apache::lonxml::olddepth=-1;
898: }
899:
900: my @timers;
901: my $lasttime;
902: sub increasedepth {
903: my ($token) = @_;
904: $Apache::lonxml::depth++;
905: $Apache::lonxml::depthcounter[$Apache::lonxml::depth]++;
906: if ($Apache::lonxml::depthcounter[$Apache::lonxml::depth]==1) {
907: $Apache::lonxml::olddepth=$Apache::lonxml::depth;
908: }
909: my $time;
910: if ($Apache::lonxml::debug eq "1") {
911: push(@timers,[&gettimeofday()]);
912: $time=&tv_interval($lasttime);
913: $lasttime=[&gettimeofday()];
914: }
915: my $spacing=' 'x($Apache::lonxml::depth-1);
916: my $curdepth=join('_',@Apache::lonxml::depthcounter);
917: &Apache::lonxml::debug("s$spacing$Apache::lonxml::depth : $Apache::lonxml::olddepth : $curdepth : $token->[1] : $time : \n");
918: #print "<br />s $Apache::lonxml::depth : $Apache::lonxml::olddepth : $curdepth : $token->[1]\n";
919: }
920:
921: sub decreasedepth {
922: my ($token) = @_;
923: $Apache::lonxml::depth--;
924: if ($Apache::lonxml::depth<$Apache::lonxml::olddepth-1) {
925: $#Apache::lonxml::depthcounter--;
926: $Apache::lonxml::olddepth=$Apache::lonxml::depth+1;
927: }
928: if ( $Apache::lonxml::depth < -1) {
929: &Apache::lonxml::warning(&mt("Missing tags, unable to properly run file."));
930: $Apache::lonxml::depth='-1';
931: }
932: my ($timer,$time);
933: if ($Apache::lonxml::debug eq "1") {
934: $timer=pop(@timers);
935: $time=&tv_interval($lasttime);
936: $lasttime=[&gettimeofday()];
937: }
938: my $spacing=' 'x$Apache::lonxml::depth;
939: my $curdepth=join('_',@Apache::lonxml::depthcounter);
940: &Apache::lonxml::debug("e$spacing$Apache::lonxml::depth : $Apache::lonxml::olddepth : $curdepth : $token->[1] : $time : ".&tv_interval($timer)."\n");
941: #print "<br />e $Apache::lonxml::depth : $Apache::lonxml::olddepth : $token->[1] : $curdepth\n";
942: }
943:
944: sub get_id {
945: my ($parstack,$safeeval)=@_;
946: my $id= &Apache::lonxml::get_param('id',$parstack,$safeeval);
947: if ($env{'request.state'} eq 'construct' && $id =~ /(\.|_)/) {
948: &error(&mt("IDs are not allowed to contain "<tt>_</tt>" or "<tt>.</tt>""));
949: }
950: if ($id =~ /^\s*$/) { $id = $Apache::lonxml::curdepth; }
951: return $id;
952: }
953:
954: sub get_all_text_unbalanced {
955: #there is a copy of this in lonpublisher.pm
956: my($tag,$pars)= @_;
957: my $token;
958: my $result='';
959: $tag='<'.$tag.'>';
960: while ($token = $$pars[-1]->get_token) {
961: if (($token->[0] eq 'T')||($token->[0] eq 'C')||($token->[0] eq 'D')) {
962: if ($token->[0] eq 'T' && $token->[2]) {
963: $result.='<![CDATA['.$token->[1].']]>';
964: } else {
965: $result.=$token->[1];
966: }
967: } elsif ($token->[0] eq 'PI') {
968: $result.=$token->[2];
969: } elsif ($token->[0] eq 'S') {
970: $result.=$token->[4];
971: } elsif ($token->[0] eq 'E') {
972: $result.=$token->[2];
973: }
974: if ($result =~ /\Q$tag\E/is) {
975: ($result,my $redo)=$result =~ /(.*)\Q$tag\E(.*)/is;
976: #&Apache::lonxml::debug('Got a winner with leftovers ::'.$2);
977: #&Apache::lonxml::debug('Result is :'.$1);
978: $redo=$tag.$redo;
979: &Apache::lonxml::newparser($pars,\$redo);
980: last;
981: }
982: }
983: return $result
984: }
985:
986: sub increment_counter {
987: my ($increment) = @_;
988: if (defined($increment) && $increment gt 0) {
989: $Apache::lonxml::counter+=$increment;
990: } else {
991: $Apache::lonxml::counter++;
992: }
993: $Apache::lonxml::counter_changed=1;
994: }
995:
996: sub init_counter {
997: if ($env{'request.state'} eq 'construct') {
998: $Apache::lonxml::counter=1;
999: $Apache::lonxml::counter_changed=1;
1000: } elsif (defined($env{'form.counter'})) {
1001: $Apache::lonxml::counter=$env{'form.counter'};
1002: $Apache::lonxml::counter_changed=0;
1003: } else {
1004: $Apache::lonxml::counter=1;
1005: $Apache::lonxml::counter_changed=1;
1006: }
1007: }
1008:
1009: sub store_counter {
1010: &Apache::lonnet::appenv(('form.counter' => $Apache::lonxml::counter));
1011: $Apache::lonxml::counter_changed=0;
1012: return '';
1013: }
1014:
1015: {
1016: my $state;
1017: sub clear_problem_counter {
1018: undef($state);
1019: &Apache::lonnet::delenv('form.counter');
1020: &Apache::lonxml::init_counter();
1021: &Apache::lonxml::store_counter();
1022: }
1023:
1024: sub remember_problem_counter {
1025: &Apache::lonnet::transfer_profile_to_env(undef,undef,1);
1026: $state = $env{'form.counter'};
1027: }
1028:
1029: sub restore_problem_counter {
1030: if (defined($state)) {
1031: &Apache::lonnet::appenv(('form.counter' => $state));
1032: }
1033: }
1034: sub get_problem_counter {
1035: if ($Apache::lonxml::counter_changed) { &store_counter() }
1036: &Apache::lonnet::transfer_profile_to_env(undef,undef,1);
1037: return $env{'form.counter'};
1038: }
1039: }
1040:
1041: sub get_all_text {
1042: my($tag,$pars,$style)= @_;
1043: my $gotfullstack=1;
1044: if (ref($pars) ne 'ARRAY') {
1045: $gotfullstack=0;
1046: $pars=[$pars];
1047: }
1048: if (ref($style) ne 'HASH') {
1049: $style={};
1050: }
1051: my $depth=0;
1052: my $token;
1053: my $result='';
1054: if ( $tag =~ m:^/: ) {
1055: my $tag=substr($tag,1);
1056: #&Apache::lonxml::debug("have:$tag:");
1057: my $top_empty=0;
1058: while (($depth >=0) && ($#$pars > -1) && (!$top_empty)) {
1059: while (($depth >=0) && ($token = $$pars[-1]->get_token)) {
1060: #&Apache::lonxml::debug("e token:$token->[0]:$depth:$token->[1]:".$#$pars.":".$#Apache::lonxml::pwd);
1061: if (($token->[0] eq 'T')||($token->[0] eq 'C')||($token->[0] eq 'D')) {
1062: if ($token->[2]) {
1063: $result.='<![CDATA['.$token->[1].']]>';
1064: } else {
1065: $result.=$token->[1];
1066: }
1067: } elsif ($token->[0] eq 'PI') {
1068: $result.=$token->[2];
1069: } elsif ($token->[0] eq 'S') {
1070: if ($token->[1] =~ /^\Q$tag\E$/i) { $depth++; }
1071: if ($token->[1] =~ /^LONCAPA_INTERNAL_TURN_STYLE_ON$/) { $Apache::lonxml::usestyle=1; }
1072: if ($token->[1] =~ /^LONCAPA_INTERNAL_TURN_STYLE_OFF$/) { $Apache::lonxml::usestyle=0; }
1073: $result.=$token->[4];
1074: } elsif ($token->[0] eq 'E') {
1075: if ( $token->[1] =~ /^\Q$tag\E$/i) { $depth--; }
1076: #skip sending back the last end tag
1077: if ($depth == 0 && exists($$style{'/'.$token->[1]}) && $Apache::lonxml::usestyle) {
1078: my $string=
1079: '<LONCAPA_INTERNAL_TURN_STYLE_OFF end="yes" />'.
1080: $$style{'/'.$token->[1]}.
1081: $token->[2].
1082: '<LONCAPA_INTERNAL_TURN_STYLE_ON />';
1083: &Apache::lonxml::newparser($pars,\$string);
1084: #&Apache::lonxml::debug("reParsing $string");
1085: next;
1086: }
1087: if ($depth > -1) {
1088: $result.=$token->[2];
1089: } else {
1090: $$pars[-1]->unget_token($token);
1091: }
1092: }
1093: }
1094: if (($depth >=0) && ($#$pars == 0) ) { $top_empty=1; }
1095: if (($depth >=0) && ($#$pars > 0) ) {
1096: pop(@$pars);
1097: pop(@Apache::lonxml::pwd);
1098: }
1099: }
1100: if ($top_empty && $depth >= 0) {
1101: #never found the end tag ran out of text, throw error send back blank
1102: &error('Never found end tag for <'.$tag.
1103: '> current string <pre>'.
1104: &HTML::Entities::encode($result,'<>&"').
1105: '</pre>');
1106: if ($gotfullstack) {
1107: my $newstring='</'.$tag.'>'.$result;
1108: &Apache::lonxml::newparser($pars,\$newstring);
1109: }
1110: $result='';
1111: }
1112: } else {
1113: while ($#$pars > -1) {
1114: while ($token = $$pars[-1]->get_token) {
1115: #&Apache::lonxml::debug("s token:$token->[0]:$depth:$token->[1]");
1116: if (($token->[0] eq 'T')||($token->[0] eq 'C')||
1117: ($token->[0] eq 'D')) {
1118: if ($token->[2]) {
1119: $result.='<![CDATA['.$token->[1].']]>';
1120: } else {
1121: $result.=$token->[1];
1122: }
1123: } elsif ($token->[0] eq 'PI') {
1124: $result.=$token->[2];
1125: } elsif ($token->[0] eq 'S') {
1126: if ( $token->[1] =~ /^\Q$tag\E$/i) {
1127: $$pars[-1]->unget_token($token); last;
1128: } else {
1129: $result.=$token->[4];
1130: }
1131: if ($token->[1] =~ /^LONCAPA_INTERNAL_TURN_STYLE_ON$/) { $Apache::lonxml::usestyle=1; }
1132: if ($token->[1] =~ /^LONCAPA_INTERNAL_TURN_STYLE_OFF$/) { $Apache::lonxml::usestyle=0; }
1133: } elsif ($token->[0] eq 'E') {
1134: $result.=$token->[2];
1135: }
1136: }
1137: if (($#$pars > 0) ) {
1138: pop(@$pars);
1139: pop(@Apache::lonxml::pwd);
1140: } else { last; }
1141: }
1142: }
1143: #&Apache::lonxml::debug("Exit:$result:");
1144: return $result
1145: }
1146:
1147: sub newparser {
1148: my ($parser,$contentref,$dir) = @_;
1149: push (@$parser,HTML::LCParser->new($contentref));
1150: $$parser[-1]->xml_mode(1);
1151: $$parser[-1]->marked_sections(1);
1152: if ( $dir eq '' ) {
1153: push (@Apache::lonxml::pwd, $Apache::lonxml::pwd[$#Apache::lonxml::pwd]);
1154: } else {
1155: push (@Apache::lonxml::pwd, $dir);
1156: }
1157: }
1158:
1159: sub parstring {
1160: my ($token) = @_;
1161: my (@vars,@values);
1162: foreach my $attr (@{$token->[3]}) {
1163: if ($attr!~/\W/) {
1164: my $val=$token->[2]->{$attr};
1165: $val =~ s/([\%\@\\\"\'])/\\$1/g;
1166: $val =~ s/(\$[^\{a-zA-Z_])/\\$1/g;
1167: $val =~ s/(\$)$/\\$1/;
1168: #if ($val =~ m/^[\%\@]/) { $val="\\".$val; }
1169: push(@vars,"\$$attr");
1170: push(@values,"\"$val\"");
1171: }
1172: }
1173: my $var_init =
1174: (@vars) ? 'my ('.join(',',@vars).') = ('.join(',',@values).');'
1175: : '';
1176: return $var_init;
1177: }
1178:
1179: sub extlink {
1180: my ($res,$exact)=@_;
1181: if (!$exact) {
1182: $res=&Apache::lonnet::hreflocation($Apache::lonxml::pwd[-1],$res);
1183: }
1184: push(@Apache::lonxml::extlinks,$res)
1185: }
1186:
1187: sub writeallows {
1188: unless ($#extlinks>=0) { return; }
1189: my $thisurl = &Apache::lonnet::clutter(shift);
1190: if ($env{'httpref.'.$thisurl}) {
1191: $thisurl=$env{'httpref.'.$thisurl};
1192: }
1193: my $thisdir=$thisurl;
1194: $thisdir=~s/\/[^\/]+$//;
1195: my %httpref=();
1196: foreach (@extlinks) {
1197: $httpref{'httpref.'.
1198: &Apache::lonnet::hreflocation($thisdir,$_)}=$thisurl;
1199: }
1200: @extlinks=();
1201: &Apache::lonnet::appenv(%httpref);
1202: }
1203:
1204: sub register_ssi {
1205: my ($url,%form)=@_;
1206: push (@Apache::lonxml::ssi_info,{'url'=>$url,'form'=>\%form});
1207: return '';
1208: }
1209:
1210: sub do_registered_ssi {
1211: foreach my $info (@Apache::lonxml::ssi_info) {
1212: my %form=%{ $info->{'form'}};
1213: my $url=$info->{'url'};
1214: &Apache::lonnet::ssi($url,%form);
1215: }
1216: }
1217: #
1218: # Afterburner handles anchors, highlights and links
1219: #
1220: sub afterburn {
1221: my $result=shift;
1222: &Apache::loncommon::get_unprocessed_cgi($ENV{'QUERY_STRING'},
1223: ['highlight','anchor','link']);
1224: if ($env{'form.highlight'}) {
1225: foreach (split(/\,/,$env{'form.highlight'})) {
1226: my $anchorname=$_;
1227: my $matchthis=$anchorname;
1228: $matchthis=~s/\_+/\\s\+/g;
1229: $result=~s/(\Q$matchthis\E)/\<font color=\"red\"\>$1\<\/font\>/gs;
1230: }
1231: }
1232: if ($env{'form.link'}) {
1233: foreach (split(/\,/,$env{'form.link'})) {
1234: my ($anchorname,$linkurl)=split(/\>/,$_);
1235: my $matchthis=$anchorname;
1236: $matchthis=~s/\_+/\\s\+/g;
1237: $result=~s/(\Q$matchthis\E)/\<a href=\"$linkurl\"\>$1\<\/a\>/gs;
1238: }
1239: }
1240: if ($env{'form.anchor'}) {
1241: my $anchorname=$env{'form.anchor'};
1242: my $matchthis=$anchorname;
1243: $matchthis=~s/\_+/\\s\+/g;
1244: $result=~s/(\Q$matchthis\E)/\<a name=\"$anchorname\"\>$1\<\/a\>/s;
1245: $result.=(<<"ENDSCRIPT");
1246: <script type="text/javascript">
1247: document.location.hash='$anchorname';
1248: </script>
1249: ENDSCRIPT
1250: }
1251: return $result;
1252: }
1253:
1254: sub storefile {
1255: my ($file,$contents)=@_;
1256: &Apache::lonnet::correct_line_ends(\$contents);
1257: if (my $fh=Apache::File->new('>'.$file)) {
1258: print $fh $contents;
1259: $fh->close();
1260: return 1;
1261: } else {
1262: &warning("Unable to save file $file");
1263: return 0;
1264: }
1265: }
1266:
1267: sub createnewhtml {
1268: my $title=&mt('Title of document goes here');
1269: my $body=&mt('Body of document goes here');
1270: my $filecontents=(<<SIMPLECONTENT);
1271: <html>
1272: <head>
1273: <title>$title</title>
1274: </head>
1275: <body bgcolor="#FFFFFF">
1276: $body
1277: </body>
1278: </html>
1279: SIMPLECONTENT
1280: return $filecontents;
1281: }
1282:
1283: sub createnewsty {
1284: my $filecontents=(<<SIMPLECONTENT);
1285: <definetag name="">
1286: <render>
1287: <web></web>
1288: <tex></tex>
1289: </render>
1290: </definetag>
1291: SIMPLECONTENT
1292: return $filecontents;
1293: }
1294:
1295:
1296: sub inserteditinfo {
1297: my ($result,$filecontents,$filetype)=@_;
1298: $filecontents = &HTML::Entities::encode($filecontents,'<>&"');
1299: # my $editheader='<a href="#editsection">Edit below</a><hr />';
1300: my $xml_help = '';
1301: my $initialize='';
1302: if ($filetype eq 'html') {
1303: my $addbuttons=&Apache::lonhtmlcommon::htmlareaaddbuttons();
1304: $initialize=&Apache::lonhtmlcommon::spellheader();
1305: if (!&Apache::lonhtmlcommon::htmlareablocked() &&
1306: &Apache::lonhtmlcommon::htmlareabrowser()) {
1307: $initialize.=(<<FULLPAGE);
1308: <script type="text/javascript">
1309: $addbuttons
1310:
1311: HTMLArea.loadPlugin("FullPage");
1312:
1313: function initDocument() {
1314: var editor=new HTMLArea("filecont",config);
1315: editor.registerPlugin(FullPage);
1316: editor.generate();
1317: }
1318: </script>
1319: FULLPAGE
1320: } else {
1321: $initialize.=(<<FULLPAGE);
1322: <script type="text/javascript">
1323: $addbuttons
1324: function initDocument() {
1325: }
1326: </script>
1327: FULLPAGE
1328: }
1329: $result=~s/\<body([^\>]*)\>/\<body onload="initDocument()" $1\>/i;
1330: $xml_help=&Apache::loncommon::helpLatexCheatsheet();
1331: }
1332: my $cleanbut = '';
1333:
1334: my $titledisplay=&display_title();
1335: my %lt=&Apache::lonlocal::texthash('st' => 'Save and Edit',
1336: 'vi' => 'Save and View',
1337: 'dv' => 'Discard Edits and View',
1338: 'un' => 'undo',
1339: 'ed' => 'Edit');
1340: my $buttons=(<<BUTTONS);
1341: $cleanbut
1342: <input type="submit" name="discardview" accesskey="d" value="$lt{'dv'}" />
1343: <input type="submit" name="Undo" accesskey="u" value="$lt{'un'}" /><hr>
1344: <input type="submit" name="savethisfile" accesskey="s" value="$lt{'st'}" />
1345: <input type="submit" name="viewmode" accesskey="v" value="$lt{'vi'}" />
1346: BUTTONS
1347: $buttons.=&Apache::lonhtmlcommon::spelllink('xmledit','filecont');
1348: my $editfooter=(<<ENDFOOTER);
1349: $initialize
1350: <hr />
1351: <a name="editsection" />
1352: <form method="post" name="xmledit">
1353: $xml_help
1354: <input type="hidden" name="editmode" value="$lt{'ed'}" />
1355: $buttons<br />
1356: <textarea style="width:100%" cols="80" rows="44" name="filecont" id="filecont">$filecontents</textarea>
1357: <br />$buttons
1358: <br />
1359: </form>
1360: $titledisplay
1361: </body>
1362: ENDFOOTER
1363: # $result=~s/(\<body[^\>]*\>)/$1$editheader/is;
1364: $result=~s/(\<\/body\>)/$editfooter/is;
1365: return $result;
1366: }
1367:
1368: sub get_target {
1369: my $viewgrades=&Apache::lonnet::allowed('vgr',$env{'request.course.id'});
1370: if ( $env{'request.state'} eq 'published') {
1371: if ( defined($env{'form.grade_target'})
1372: && ($viewgrades == 'F' )) {
1373: return ($env{'form.grade_target'});
1374: } elsif (defined($env{'form.grade_target'})) {
1375: if (($env{'form.grade_target'} eq 'web') ||
1376: ($env{'form.grade_target'} eq 'tex') ) {
1377: return $env{'form.grade_target'}
1378: } else {
1379: return 'web';
1380: }
1381: } else {
1382: return 'web';
1383: }
1384: } elsif ($env{'request.state'} eq 'construct') {
1385: if ( defined($env{'form.grade_target'})) {
1386: return ($env{'form.grade_target'});
1387: } else {
1388: return 'web';
1389: }
1390: } else {
1391: return 'web';
1392: }
1393: }
1394:
1395: sub handler {
1396: my $request=shift;
1397:
1398: my $target=&get_target();
1399:
1400: $Apache::lonxml::debug=$env{'user.debug'};
1401:
1402: &Apache::loncommon::content_type($request,'text/html');
1403: &Apache::loncommon::no_cache($request);
1404: if ($env{'request.state'} eq 'published') {
1405: $request->set_last_modified(&Apache::lonnet::metadata($request->uri,
1406: 'lastrevisiondate'));
1407: }
1408: $request->send_http_header;
1409:
1410: return OK if $request->header_only;
1411:
1412:
1413: my $file=&Apache::lonnet::filelocation("",$request->uri);
1414: my $filetype;
1415: if ($file =~ /\.sty$/) {
1416: $filetype='sty';
1417: } else {
1418: $filetype='html';
1419: }
1420: #
1421: # Edit action? Save file.
1422: #
1423: if (!($env{'request.state'} eq 'published')) {
1424: if ($env{'form.savethisfile'} || $env{'form.viewmode'} || $env{'form.Undo'}) {
1425: my $html_file=&Apache::lonnet::getfile($file);
1426: my $error = &Apache::lonhomework::handle_save_or_undo($request, \$html_file, \$env{'form.filecont'});
1427: }
1428: }
1429: my %mystyle;
1430: my $result = '';
1431: my $filecontents=&Apache::lonnet::getfile($file);
1432: if ($filecontents eq -1) {
1433: my $start_page=&Apache::loncommon::start_page('File Error');
1434: my $end_page=&Apache::loncommon::end_page();
1435: my $fnf=&mt('File not found');
1436: $result=(<<ENDNOTFOUND);
1437: $start_page
1438: <b>$fnf: $file</b>
1439: $end_page
1440: ENDNOTFOUND
1441: $filecontents='';
1442: if ($env{'request.state'} ne 'published') {
1443: if ($filetype eq 'sty') {
1444: $filecontents=&createnewsty();
1445: } else {
1446: $filecontents=&createnewhtml();
1447: }
1448: $env{'form.editmode'}='Edit'; #force edit mode
1449: }
1450: } else {
1451: unless ($env{'request.state'} eq 'published') {
1452: if ($filecontents=~/BEGIN LON-CAPA Internal/) {
1453: &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.'));
1454: }
1455: #
1456: # we are in construction space, see if edit mode forced
1457: &Apache::loncommon::get_unprocessed_cgi($ENV{'QUERY_STRING'},
1458: ['editmode']);
1459: }
1460: &Apache::lonnet::logthis("edit mode is ".$env{'form.editmode'});
1461: if (!$env{'form.editmode'} || $env{'form.viewmode'} || $env{'form.discardview'}) {
1462: $result = &Apache::lonxml::xmlparse($request,$target,$filecontents,
1463: '',%mystyle);
1464: undef($Apache::lonhomework::parsing_a_task);
1465: &Apache::loncommon::get_unprocessed_cgi($ENV{'QUERY_STRING'},
1466: ['rawmode']);
1467: if ($env{'form.rawmode'}) { $result = $filecontents; }
1468: }
1469: }
1470:
1471: #
1472: # Edit action? Insert editing commands
1473: #
1474: unless ($env{'request.state'} eq 'published') {
1475: if ($env{'form.editmode'} && (!($env{'form.viewmode'})) && (!($env{'form.discardview'})))
1476: {
1477: my $displayfile=$request->uri;
1478: $displayfile=~s/^\/[^\/]*//;
1479: my %options = ();
1480: if ($env{'environment.remote'} ne 'off') {
1481: $options{'bgcolor'} = '#FFFFFF';
1482: }
1483: my $start_page = &Apache::loncommon::start_page(undef,undef,
1484: \%options);
1485: $result=$start_page.
1486: &Apache::lonxml::message_location().'<h3>'.
1487: $displayfile.
1488: '</h3>'.&Apache::loncommon::end_page();
1489: $result=&inserteditinfo($result,$filecontents,$filetype);
1490: }
1491: }
1492: if ($filetype eq 'html') { &writeallows($request->uri); }
1493:
1494:
1495: &Apache::lonxml::add_messages(\$result);
1496: $request->print($result);
1497:
1498: return OK;
1499: }
1500:
1501: sub display_title {
1502: my $result;
1503: if ($env{'request.state'} eq 'construct') {
1504: my $title=&Apache::lonnet::gettitle();
1505: if (!defined($title) || $title eq '') {
1506: $title = $env{'request.filename'};
1507: $title = substr($title, rindex($title, '/') + 1);
1508: }
1509: $result = "<script type='text/javascript'>top.document.title = '$title - LON-CAPA Construction Space';</script>";
1510: }
1511: return $result;
1512: }
1513:
1514: sub debug {
1515: if ($Apache::lonxml::debug eq "1") {
1516: $|=1;
1517: my $request=$Apache::lonxml::request;
1518: if (!$request) {
1519: eval { $request=Apache->request; };
1520: }
1521: if (!$request) {
1522: eval { $request=Apache2::RequestUtil->request; };
1523: }
1524: $request->print('<font size="-2"><pre>DEBUG:'.&HTML::Entities::encode($_[0],'<>&"')."</pre></font>\n");
1525: #&Apache::lonnet::logthis($_[0]);
1526: }
1527: }
1528:
1529: sub show_error_warn_msg {
1530: if ($env{'request.filename'} eq '/home/httpd/html/res/lib/templates/simpleproblem.problem' &&
1531: &Apache::lonnet::allowed('mdc',$env{'request.course.id'})) {
1532: return 1;
1533: }
1534: return (($Apache::lonxml::debug eq 1) ||
1535: ($env{'request.state'} eq 'construct') ||
1536: ($Apache::lonhomework::browse eq 'F'
1537: &&
1538: $env{'form.show_errors'} eq 'on'));
1539: }
1540:
1541: sub error {
1542: $errorcount++;
1543: if ( &show_error_warn_msg() ) {
1544: # If printing in construction space, put the error inside <pre></pre>
1545: push(@Apache::lonxml::error_messages,
1546: $Apache::lonxml::warnings_error_header.
1547: "<b>ERROR:</b>".join("<br />\n",@_)."<br />\n");
1548: $Apache::lonxml::warnings_error_header='';
1549: } else {
1550: my $errormsg;
1551: my ($symb)=&Apache::lonnet::symbread();
1552: if ( !$symb ) {
1553: #public or browsers
1554: $errormsg=&mt("An error occured while processing this resource. The author has been notified.");
1555: }
1556: my $host=$Apache::lonnet::perlvar{'lonHostID'};
1557: my $msg = join('<br />',(@_,"The error occurred on host <tt>$host</tt>"));
1558: #notify author
1559: &Apache::lonmsg::author_res_msg($env{'request.filename'},$msg);
1560: #notify course
1561: if ( $symb && $env{'request.course.id'} ) {
1562: my $cnum=$env{'course.'.$env{'request.course.id'}.'.num'};
1563: my $cdom=$env{'course.'.$env{'request.course.id'}.'.domain'};
1564: my (undef,%users)=&Apache::lonfeedback::decide_receiver(undef,0,1,1,1);
1565: my $declutter=&Apache::lonnet::declutter($env{'request.filename'});
1566: my @userlist;
1567: foreach (keys %users) {
1568: my ($user,$domain) = split(/:/, $_);
1569: push(@userlist,"$user\@$domain");
1570: my $key=$declutter.'_'.$user.'_'.$domain;
1571: my %lastnotified=&Apache::lonnet::get('nohist_xmlerrornotifications',
1572: [$key],
1573: $cdom,$cnum);
1574: my $now=time;
1575: if ($now-$lastnotified{$key}>86400) {
1576: &Apache::lonmsg::user_normal_msg($user,$domain,
1577: "Error [$declutter]",$msg);
1578: &Apache::lonnet::put('nohist_xmlerrornotifications',
1579: {$key => $now},
1580: $cdom,$cnum);
1581: }
1582: }
1583: if ($env{'request.role.adv'}) {
1584: $errormsg=&mt("An error occured while processing this resource. The course personnel ([_1]) and the author have been notified.",join(', ',@userlist));
1585: } else {
1586: $errormsg=&mt("An error occured while processing this resource. The instructor has been notified.");
1587: }
1588: }
1589: push(@Apache::lonxml::error_messages,"<b>$errormsg</b> <br />");
1590: }
1591: }
1592:
1593: sub warning {
1594: $warningcount++;
1595:
1596: if ($env{'form.grade_target'} ne 'tex') {
1597: if ( &show_error_warn_msg() ) {
1598: push(@Apache::lonxml::warning_messages,
1599: $Apache::lonxml::warnings_error_header.
1600: "<b>W</b>ARNING<b>:</b>".join('<br />',@_)."<br />\n");
1601: $Apache::lonxml::warnings_error_header='';
1602: }
1603: }
1604: }
1605:
1606: sub info {
1607: if ($env{'form.grade_target'} ne 'tex'
1608: && $env{'request.state'} eq 'construct') {
1609: push(@Apache::lonxml::info_messages,join('<br />',@_)."<br />\n");
1610: }
1611: }
1612:
1613: sub message_location {
1614: return '__LONCAPA_INTERNAL_MESSAGE_LOCATION__';
1615: }
1616:
1617: sub add_messages {
1618: my ($msg)=@_;
1619: my $result=join(' ',
1620: @Apache::lonxml::info_messages,
1621: @Apache::lonxml::error_messages,
1622: @Apache::lonxml::warning_messages);
1623: undef(@Apache::lonxml::info_messages);
1624: undef(@Apache::lonxml::error_messages);
1625: undef(@Apache::lonxml::warning_messages);
1626: $$msg=~s/__LONCAPA_INTERNAL_MESSAGE_LOCATION__/$result/;
1627: $$msg=~s/__LONCAPA_INTERNAL_MESSAGE_LOCATION__//g;
1628: }
1629:
1630: sub get_param {
1631: my ($param,$parstack,$safeeval,$context,$case_insensitive) = @_;
1632: if ( ! $context ) { $context = -1; }
1633: my $args ='';
1634: if ( $#$parstack > (-2-$context) ) { $args=$$parstack[$context]; }
1635: if ( ! $Apache::lonxml::usestyle ) {
1636: $args=$Apache::lonxml::style_values.$args;
1637: }
1638: if ( ! $args ) { return undef; }
1639: if ( $case_insensitive ) {
1640: if ($args =~ s/(my (?:.*))(\$\Q$param\E[,\)])/$1.lc($2)/ei) {
1641: return &Apache::run::run("{$args;".'return $'.$param.'}',
1642: $safeeval); #'
1643: } else {
1644: return undef;
1645: }
1646: } else {
1647: if ( $args =~ /my .*\$\Q$param\E[,\)]/ ) {
1648: return &Apache::run::run("{$args;".'return $'.$param.'}',
1649: $safeeval); #'
1650: } else {
1651: return undef;
1652: }
1653: }
1654: }
1655:
1656: sub get_param_var {
1657: my ($param,$parstack,$safeeval,$context,$case_insensitive) = @_;
1658: if ( ! $context ) { $context = -1; }
1659: my $args ='';
1660: if ( $#$parstack > (-2-$context) ) { $args=$$parstack[$context]; }
1661: if ( ! $Apache::lonxml::usestyle ) {
1662: $args=$Apache::lonxml::style_values.$args;
1663: }
1664: &Apache::lonxml::debug("Args are $args param is $param");
1665: if ($case_insensitive) {
1666: if (! ($args=~s/(my (?:.*))(\$\Q$param\E[,\)])/$1.lc($2)/ei)) {
1667: return undef;
1668: }
1669: } elsif ( $args !~ /my .*\$\Q$param\E[,\)]/ ) { return undef; }
1670: my $value=&Apache::run::run("{$args;".'return $'.$param.'}',$safeeval); #'
1671: &Apache::lonxml::debug("first run is $value");
1672: if ($value =~ /^[\$\@\%][a-zA-Z_]\w*$/) {
1673: &Apache::lonxml::debug("doing second");
1674: my @result=&Apache::run::run("return $value",$safeeval,1);
1675: if (!defined($result[0])) {
1676: return $value
1677: } else {
1678: if (wantarray) { return @result; } else { return $result[0]; }
1679: }
1680: } else {
1681: return $value;
1682: }
1683: }
1684:
1685: sub register_insert {
1686: my @data = split /\n/, &Apache::lonnet::getfile('/home/httpd/lonTabs/insertlist.tab');
1687: my $i;
1688: my $tagnum=0;
1689: my @order;
1690: for ($i=0;$i < $#data; $i++) {
1691: my $line = $data[$i];
1692: if ( $line =~ /^\#/ || $line =~ /^\s*\n/) { next; }
1693: if ( $line =~ /TABLE/ ) { last; }
1694: my ($tag,$descrip,$color,$function,$show,$helpfile,$helpdesc) = split(/,/, $line);
1695: if ($tag) {
1696: $insertlist{"$tagnum.tag"} = $tag;
1697: $insertlist{"$tagnum.description"} = $descrip;
1698: $insertlist{"$tagnum.color"} = $color;
1699: $insertlist{"$tagnum.function"} = $function;
1700: if (!defined($show)) { $show='yes'; }
1701: $insertlist{"$tagnum.show"}= $show;
1702: $insertlist{"$tagnum.helpfile"} = $helpfile;
1703: $insertlist{"$tagnum.helpdesc"} = $helpdesc;
1704: $insertlist{"$tag.num"}=$tagnum;
1705: $tagnum++;
1706: }
1707: }
1708: $i++; #skipping TABLE line
1709: $tagnum = 0;
1710: for (;$i < $#data;$i++) {
1711: my $line = $data[$i];
1712: my ($mnemonic,@which) = split(/ +/,$line);
1713: my $tag = $insertlist{"$tagnum.tag"};
1714: for (my $j=0;$j <=$#which;$j++) {
1715: if ( $which[$j] eq 'Y' ) {
1716: if ($insertlist{"$j.show"} ne 'no') {
1717: push(@{ $insertlist{"$tag.which"} },$j);
1718: }
1719: }
1720: }
1721: $tagnum++;
1722: }
1723: }
1724:
1725: sub description {
1726: my ($token)=@_;
1727: my $tagnum;
1728: my $tag=$token->[1];
1729: foreach my $namespace (reverse @Apache::lonxml::namespace) {
1730: my $testtag=$namespace.'::'.$tag;
1731: $tagnum=$insertlist{"$testtag.num"};
1732: if (defined($tagnum)) { last; }
1733: }
1734: if (!defined ($tagnum)) { $tagnum=$Apache::lonxml::insertlist{"$tag.num"}; }
1735: return $insertlist{$tagnum.'.description'};
1736: }
1737:
1738: # Returns a list containing the help file, and the description
1739: sub helpinfo {
1740: my ($token)=@_;
1741: my $tagnum;
1742: my $tag=$token->[1];
1743: foreach my $namespace (reverse @Apache::lonxml::namespace) {
1744: my $testtag=$namespace.'::'.$tag;
1745: $tagnum=$insertlist{"$testtag.num"};
1746: if (defined($tagnum)) { last; }
1747: }
1748: if (!defined ($tagnum)) { $tagnum=$Apache::lonxml::insertlist{"$tag.num"}; }
1749: return ($insertlist{$tagnum.'.helpfile'}, $insertlist{$tagnum.'.helpdesc'});
1750: }
1751:
1752: 1;
1753: __END__
1754:
1755:
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