1: # The LearningOnline Network with CAPA
2: # XML Parser Module
3: #
4: # $Id: lonxml.pm,v 1.416 2006/09/14 21:52:36 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,$name) = &Apache::lonxml::whichuser();
255: unless ($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: $safeeval,\%style_for_target,1);
344:
345: if ($env{'request.uri'}) {
346: &writeallows($env{'request.uri'});
347: }
348: &do_registered_ssi();
349: if ($Apache::lonxml::counter_changed) { &store_counter() }
350:
351: &clean_safespace($safeeval);
352:
353: if ($env{'form.return_only_error_and_warning_counts'}) {
354: return "$errorcount:$warningcount";
355: }
356: return $finaloutput;
357: }
358:
359: sub latex_special_symbols {
360: my ($string,$where)=@_;
361: #
362: # If e.g. in verbatim mode, then don't substitute.
363: # but return original string.
364: #
365: if (!($Apache::lonxml::substitute_LaTeX_symbols)) {
366: return $string;
367: }
368: if ($where eq 'header') {
369: $string =~ s/\\/\$\\backslash\$/g; # \ -> $\backslash$ per LaTex line by line pg 10.
370: $string =~ s/(\$|%|\{|\})/\\$1/g;
371: $string=&Apache::lonprintout::character_chart($string);
372: # any & or # leftover should be safe to just escape
373: $string=~s/([^\\])\&/$1\\\&/g;
374: $string=~s/([^\\])\#/$1\\\#/g;
375: $string =~ s/_/\\_/g; # _ -> \_
376: $string =~ s/\^/\\\^{}/g; # ^ -> \^{}
377: } else {
378: $string=~s/\\/\\ensuremath{\\backslash}/g;
379: $string=~s/\\\%|\%/\\\%/g;
380: $string=~s/\\{|{/\\{/g;
381: $string=~s/\\}|}/\\}/g;
382: $string=~s/\\ensuremath\\{\\backslash\\}/\\ensuremath{\\backslash}/g;
383: $string=~s/\\\$|\$/\\\$/g;
384: $string=~s/\\\_|\_/\\\_/g;
385: $string=~s/([^\\]|^)(\~|\^)/$1\\$2\\strut /g;
386: $string=~s/(>|<)/\\ensuremath\{$1\}/g; #more or less
387: $string=&Apache::lonprintout::character_chart($string);
388: # any & or # leftover should be safe to just escape
389: $string=~s/\\\&|\&/\\\&/g;
390: $string=~s/\\\#|\#/\\\#/g;
391: $string=~s/\|/\$\\mid\$/g;
392: #single { or } How to escape?
393: }
394: return $string;
395: }
396:
397: sub inner_xmlparse {
398: my ($target,$stack,$parstack,$pars,$safeeval,$style_for_target,$start)=@_;
399: my $finaloutput = '';
400: my $result;
401: my $token;
402: my $dontpop=0;
403: my $startredirection = $Apache::lonxml::redirection;
404: while ( $#$pars > -1 ) {
405: while ($token = $$pars['-1']->get_token) {
406: if (($token->[0] eq 'T') || ($token->[0] eq 'C') ) {
407: if ($metamode<1) {
408: my $text=$token->[1];
409: if ($token->[0] eq 'C' && $target eq 'tex') {
410: $text = '';
411: # $text = '%'.$text."\n";
412: }
413: $result.=$text;
414: }
415: } elsif (($token->[0] eq 'D')) {
416: if ($metamode<1 && $target eq 'web') {
417: my $text=$token->[1];
418: $result.=$text;
419: }
420: } elsif ($token->[0] eq 'PI') {
421: if ($metamode<1 && $target eq 'web') {
422: $result=$token->[2];
423: }
424: } elsif ($token->[0] eq 'S') {
425: # add tag to stack
426: push (@$stack,$token->[1]);
427: # add parameters list to another stack
428: push (@$parstack,&parstring($token));
429: &increasedepth($token);
430: if ($Apache::lonxml::usestyle &&
431: exists($$style_for_target{$token->[1]})) {
432: $Apache::lonxml::usestyle=0;
433: my $string=$$style_for_target{$token->[1]}.
434: '<LONCAPA_INTERNAL_TURN_STYLE_ON />';
435: &Apache::lonxml::newparser($pars,\$string);
436: $Apache::lonxml::style_values=$$parstack[-1];
437: $Apache::lonxml::style_end_values=$$parstack[-1];
438: } else {
439: $result = &callsub("start_$token->[1]", $target, $token, $stack,
440: $parstack, $pars, $safeeval, $style_for_target);
441: }
442: } elsif ($token->[0] eq 'E') {
443: if ($Apache::lonxml::usestyle &&
444: exists($$style_for_target{'/'."$token->[1]"})) {
445: $Apache::lonxml::usestyle=0;
446: my $string=$$style_for_target{'/'.$token->[1]}.
447: '<LONCAPA_INTERNAL_TURN_STYLE_ON end="'.$token->[1].'" />';
448: &Apache::lonxml::newparser($pars,\$string);
449: $Apache::lonxml::style_values=$Apache::lonxml::style_end_values;
450: $Apache::lonxml::style_end_values='';
451: $dontpop=1;
452: } else {
453: #clear out any tags that didn't end
454: while ($token->[1] ne $$stack['-1'] && ($#$stack > -1)) {
455: my $lasttag=$$stack[-1];
456: if ($token->[1] =~ /^\Q$lasttag\E$/i) {
457: &Apache::lonxml::warning('Using tag </'.$token->[1].'> on line '.$token->[3].' as end tag to <'.$$stack[-1].'>');
458: last;
459: } else {
460: &Apache::lonxml::warning('Found tag </'.$token->[1].'> on line '.$token->[3].' when looking for </'.$$stack[-1].'> in file');
461: &end_tag($stack,$parstack,$token);
462: }
463: }
464: $result = &callsub("end_$token->[1]", $target, $token, $stack,
465: $parstack, $pars,$safeeval, $style_for_target);
466: }
467: } else {
468: &Apache::lonxml::error("Unknown token event :$token->[0]:$token->[1]:");
469: }
470: #evaluate variable refs in result
471: if ($Apache::lonxml::post_evaluate &&$result ne "") {
472: my $extras;
473: if (!$Apache::lonxml::usestyle) {
474: $extras=$Apache::lonxml::style_values;
475: }
476: if ( $#$parstack > -1 ) {
477: $result=&Apache::run::evaluate($result,$safeeval,$extras.$$parstack[-1]);
478: } else {
479: $result= &Apache::run::evaluate($result,$safeeval,$extras);
480: }
481: }
482: $Apache::lonxml::post_evaluate=1;
483:
484: if (($token->[0] eq 'T') || ($token->[0] eq 'C') || ($token->[0] eq 'D') ) {
485: #Style file definitions should be correct
486: if ($target eq 'tex' && ($Apache::lonxml::usestyle)) {
487: $result=&latex_special_symbols($result);
488: }
489: }
490:
491: if ($Apache::lonxml::redirection) {
492: $Apache::lonxml::outputstack['-1'] .= $result;
493: } else {
494: $finaloutput.=$result;
495: }
496: $result = '';
497:
498: if ($token->[0] eq 'E' && !$dontpop) {
499: &end_tag($stack,$parstack,$token);
500: }
501: $dontpop=0;
502: }
503: if ($#$pars > -1) {
504: pop @$pars;
505: pop @Apache::lonxml::pwd;
506: }
507: }
508:
509: # if ($target eq 'meta') {
510: # $finaloutput.=&endredirection;
511: # }
512:
513: if ( $start && $target eq 'grade') { &endredirection(); }
514: if ( $Apache::lonxml::redirection > $startredirection) {
515: while ($Apache::lonxml::redirection > $startredirection) {
516: $finaloutput .= &endredirection();
517: }
518: }
519: if (($ENV{'QUERY_STRING'}) && ($target eq 'web')) {
520: $finaloutput=&afterburn($finaloutput);
521: }
522: return $finaloutput;
523: }
524:
525: ##
526: ## Looks to see if there is a subroutine defined for this tag. If so, call it,
527: ## otherwise do not call it as we do not know what it is.
528: ##
529: sub callsub {
530: my ($sub,$target,$token,$tagstack,$parstack,$parser,$safeeval,$style)=@_;
531: my $currentstring='';
532: my $nodefault;
533: {
534: my $sub1;
535: no strict 'refs';
536: my $tag=$token->[1];
537: # get utterly rid of extended html tags
538: if ($tag=~/^x\-/i) { return ''; }
539: my $space=$Apache::lonxml::alltags{$tag}[-1];
540: if (!$space) {
541: $tag=~tr/A-Z/a-z/;
542: $sub=~tr/A-Z/a-z/;
543: $space=$Apache::lonxml::alltags{$tag}[-1]
544: }
545:
546: my $deleted=0;
547: $Apache::lonxml::curdepth=join('_',@Apache::lonxml::depthcounter);
548: if (($token->[0] eq 'S') && ($target eq 'modified')) {
549: $deleted=&Apache::edit::handle_delete($space,$target,$token,$tagstack,
550: $parstack,$parser,$safeeval,
551: $style);
552: }
553: if (!$deleted) {
554: if ($space) {
555: #&Apache::lonxml::debug("Calling sub $sub in $space $metamode");
556: $sub1="$space\:\:$sub";
557: ($currentstring,$nodefault) = &$sub1($target,$token,$tagstack,
558: $parstack,$parser,$safeeval,
559: $style);
560: } else {
561: if ($target eq 'tex') {
562: # throw away tag name
563: return '';
564: }
565: #&Apache::lonxml::debug("NOT Calling sub $sub in $space $metamode");
566: if ($metamode <1) {
567: if (defined($token->[4]) && ($metamode < 1)) {
568: $currentstring = $token->[4];
569: } else {
570: $currentstring = $token->[2];
571: }
572: }
573: }
574: # &Apache::lonxml::debug("nodefalt:$nodefault:");
575: if ($currentstring eq '' && $nodefault eq '') {
576: if ($target eq 'edit') {
577: #&Apache::lonxml::debug("doing default edit for $token->[1]");
578: if ($token->[0] eq 'S') {
579: $currentstring = &Apache::edit::tag_start($target,$token);
580: } elsif ($token->[0] eq 'E') {
581: $currentstring = &Apache::edit::tag_end($target,$token);
582: }
583: } elsif ($target eq 'modified') {
584: if ($token->[0] eq 'S') {
585: $currentstring = $token->[4];
586: $currentstring.=&Apache::edit::handle_insert();
587: } elsif ($token->[0] eq 'E') {
588: $currentstring = $token->[2];
589: $currentstring.=&Apache::edit::handle_insertafter($token->[1]);
590: } else {
591: $currentstring = $token->[2];
592: }
593: }
594: }
595: }
596: use strict 'refs';
597: }
598: return $currentstring;
599: }
600:
601: sub setup_globals {
602: my ($request,$target)=@_;
603: $Apache::lonxml::request=$request;
604: $errorcount=0;
605: $warningcount=0;
606: $Apache::lonxml::default_homework_loaded=0;
607: $Apache::lonxml::usestyle=1;
608: &init_counter();
609: @Apache::lonxml::pwd=();
610: @Apache::lonxml::extlinks=();
611: @Apache::lonxml::ssi_info=();
612: $Apache::lonxml::post_evaluate=1;
613: $Apache::lonxml::warnings_error_header='';
614: $Apache::lonxml::substitute_LaTeX_symbols = 1;
615: if ($target eq 'meta') {
616: $Apache::lonxml::redirection = 0;
617: $Apache::lonxml::metamode = 1;
618: $Apache::lonxml::evaluate = 1;
619: $Apache::lonxml::import = 0;
620: } elsif ($target eq 'answer') {
621: $Apache::lonxml::redirection = 0;
622: $Apache::lonxml::metamode = 1;
623: $Apache::lonxml::evaluate = 1;
624: $Apache::lonxml::import = 1;
625: } elsif ($target eq 'grade') {
626: &startredirection(); #ended in inner_xmlparse on exit
627: $Apache::lonxml::metamode = 0;
628: $Apache::lonxml::evaluate = 1;
629: $Apache::lonxml::import = 1;
630: } elsif ($target eq 'modified') {
631: $Apache::lonxml::redirection = 0;
632: $Apache::lonxml::metamode = 0;
633: $Apache::lonxml::evaluate = 0;
634: $Apache::lonxml::import = 0;
635: } elsif ($target eq 'edit') {
636: $Apache::lonxml::redirection = 0;
637: $Apache::lonxml::metamode = 0;
638: $Apache::lonxml::evaluate = 0;
639: $Apache::lonxml::import = 0;
640: } elsif ($target eq 'analyze') {
641: $Apache::lonxml::redirection = 0;
642: $Apache::lonxml::metamode = 0;
643: $Apache::lonxml::evaluate = 1;
644: $Apache::lonxml::import = 1;
645: } else {
646: $Apache::lonxml::redirection = 0;
647: $Apache::lonxml::metamode = 0;
648: $Apache::lonxml::evaluate = 1;
649: $Apache::lonxml::import = 1;
650: }
651: }
652:
653: sub init_safespace {
654: my ($target,$safeeval,$safehole,$safeinit) = @_;
655: $safeeval->deny_only(':dangerous');
656: $safeeval->reval('use Math::Complex;');
657: $safeeval->permit_only(":default");
658: $safeeval->permit("entereval");
659: $safeeval->permit(":base_math");
660: $safeeval->permit("sort");
661: $safeeval->permit("time");
662: $safeeval->deny("rand");
663: $safeeval->deny("srand");
664: $safeeval->deny(":base_io");
665: $safehole->wrap(\&Apache::scripttag::xmlparse,$safeeval,'&xmlparse');
666: $safehole->wrap(\&Apache::outputtags::multipart,$safeeval,'&multipart');
667: $safehole->wrap(\&Apache::lonnet::EXT,$safeeval,'&EXT');
668: $safehole->wrap(\&Apache::chemresponse::chem_standard_order,$safeeval,
669: '&chem_standard_order');
670: $safehole->wrap(\&Apache::response::check_status,$safeeval,'&check_status');
671:
672: $safehole->wrap(\&Math::Cephes::asin,$safeeval,'&asin');
673: $safehole->wrap(\&Math::Cephes::acos,$safeeval,'&acos');
674: $safehole->wrap(\&Math::Cephes::atan,$safeeval,'&atan');
675: $safehole->wrap(\&Math::Cephes::sinh,$safeeval,'&sinh');
676: $safehole->wrap(\&Math::Cephes::cosh,$safeeval,'&cosh');
677: $safehole->wrap(\&Math::Cephes::tanh,$safeeval,'&tanh');
678: $safehole->wrap(\&Math::Cephes::asinh,$safeeval,'&asinh');
679: $safehole->wrap(\&Math::Cephes::acosh,$safeeval,'&acosh');
680: $safehole->wrap(\&Math::Cephes::atanh,$safeeval,'&atanh');
681: $safehole->wrap(\&Math::Cephes::erf,$safeeval,'&erf');
682: $safehole->wrap(\&Math::Cephes::erfc,$safeeval,'&erfc');
683: $safehole->wrap(\&Math::Cephes::j0,$safeeval,'&j0');
684: $safehole->wrap(\&Math::Cephes::j1,$safeeval,'&j1');
685: $safehole->wrap(\&Math::Cephes::jn,$safeeval,'&jn');
686: $safehole->wrap(\&Math::Cephes::jv,$safeeval,'&jv');
687: $safehole->wrap(\&Math::Cephes::y0,$safeeval,'&y0');
688: $safehole->wrap(\&Math::Cephes::y1,$safeeval,'&y1');
689: $safehole->wrap(\&Math::Cephes::yn,$safeeval,'&yn');
690: $safehole->wrap(\&Math::Cephes::yv,$safeeval,'&yv');
691:
692: $safehole->wrap(\&Math::Cephes::bdtr ,$safeeval,'&bdtr' );
693: $safehole->wrap(\&Math::Cephes::bdtrc ,$safeeval,'&bdtrc' );
694: $safehole->wrap(\&Math::Cephes::bdtri ,$safeeval,'&bdtri' );
695: $safehole->wrap(\&Math::Cephes::btdtr ,$safeeval,'&btdtr' );
696: $safehole->wrap(\&Math::Cephes::chdtr ,$safeeval,'&chdtr' );
697: $safehole->wrap(\&Math::Cephes::chdtrc,$safeeval,'&chdtrc');
698: $safehole->wrap(\&Math::Cephes::chdtri,$safeeval,'&chdtri');
699: $safehole->wrap(\&Math::Cephes::fdtr ,$safeeval,'&fdtr' );
700: $safehole->wrap(\&Math::Cephes::fdtrc ,$safeeval,'&fdtrc' );
701: $safehole->wrap(\&Math::Cephes::fdtri ,$safeeval,'&fdtri' );
702: $safehole->wrap(\&Math::Cephes::gdtr ,$safeeval,'&gdtr' );
703: $safehole->wrap(\&Math::Cephes::gdtrc ,$safeeval,'&gdtrc' );
704: $safehole->wrap(\&Math::Cephes::nbdtr ,$safeeval,'&nbdtr' );
705: $safehole->wrap(\&Math::Cephes::nbdtrc,$safeeval,'&nbdtrc');
706: $safehole->wrap(\&Math::Cephes::nbdtri,$safeeval,'&nbdtri');
707: $safehole->wrap(\&Math::Cephes::ndtr ,$safeeval,'&ndtr' );
708: $safehole->wrap(\&Math::Cephes::ndtri ,$safeeval,'&ndtri' );
709: $safehole->wrap(\&Math::Cephes::pdtr ,$safeeval,'&pdtr' );
710: $safehole->wrap(\&Math::Cephes::pdtrc ,$safeeval,'&pdtrc' );
711: $safehole->wrap(\&Math::Cephes::pdtri ,$safeeval,'&pdtri' );
712: $safehole->wrap(\&Math::Cephes::stdtr ,$safeeval,'&stdtr' );
713: $safehole->wrap(\&Math::Cephes::stdtri,$safeeval,'&stdtri');
714:
715: $safehole->wrap(\&Math::Cephes::Matrix::mat,$safeeval,'&mat');
716: $safehole->wrap(\&Math::Cephes::Matrix::new,$safeeval,
717: '&Math::Cephes::Matrix::new');
718: $safehole->wrap(\&Math::Cephes::Matrix::coef,$safeeval,
719: '&Math::Cephes::Matrix::coef');
720: $safehole->wrap(\&Math::Cephes::Matrix::clr,$safeeval,
721: '&Math::Cephes::Matrix::clr');
722: $safehole->wrap(\&Math::Cephes::Matrix::add,$safeeval,
723: '&Math::Cephes::Matrix::add');
724: $safehole->wrap(\&Math::Cephes::Matrix::sub,$safeeval,
725: '&Math::Cephes::Matrix::sub');
726: $safehole->wrap(\&Math::Cephes::Matrix::mul,$safeeval,
727: '&Math::Cephes::Matrix::mul');
728: $safehole->wrap(\&Math::Cephes::Matrix::div,$safeeval,
729: '&Math::Cephes::Matrix::div');
730: $safehole->wrap(\&Math::Cephes::Matrix::inv,$safeeval,
731: '&Math::Cephes::Matrix::inv');
732: $safehole->wrap(\&Math::Cephes::Matrix::transp,$safeeval,
733: '&Math::Cephes::Matrix::transp');
734: $safehole->wrap(\&Math::Cephes::Matrix::simq,$safeeval,
735: '&Math::Cephes::Matrix::simq');
736: $safehole->wrap(\&Math::Cephes::Matrix::mat_to_vec,$safeeval,
737: '&Math::Cephes::Matrix::mat_to_vec');
738: $safehole->wrap(\&Math::Cephes::Matrix::vec_to_mat,$safeeval,
739: '&Math::Cephes::Matrix::vec_to_mat');
740: $safehole->wrap(\&Math::Cephes::Matrix::check,$safeeval,
741: '&Math::Cephes::Matrix::check');
742: $safehole->wrap(\&Math::Cephes::Matrix::check,$safeeval,
743: '&Math::Cephes::Matrix::check');
744:
745: # $safehole->wrap(\&Math::Cephes::new_fract,$safeeval,'&new_fract');
746: # $safehole->wrap(\&Math::Cephes::radd,$safeeval,'&radd');
747: # $safehole->wrap(\&Math::Cephes::rsub,$safeeval,'&rsub');
748: # $safehole->wrap(\&Math::Cephes::rmul,$safeeval,'&rmul');
749: # $safehole->wrap(\&Math::Cephes::rdiv,$safeeval,'&rdiv');
750: # $safehole->wrap(\&Math::Cephes::euclid,$safeeval,'&euclid');
751:
752: $safehole->wrap(\&Math::Random::random_beta,$safeeval,'&math_random_beta');
753: $safehole->wrap(\&Math::Random::random_chi_square,$safeeval,'&math_random_chi_square');
754: $safehole->wrap(\&Math::Random::random_exponential,$safeeval,'&math_random_exponential');
755: $safehole->wrap(\&Math::Random::random_f,$safeeval,'&math_random_f');
756: $safehole->wrap(\&Math::Random::random_gamma,$safeeval,'&math_random_gamma');
757: $safehole->wrap(\&Math::Random::random_multivariate_normal,$safeeval,'&math_random_multivariate_normal');
758: $safehole->wrap(\&Math::Random::random_multinomial,$safeeval,'&math_random_multinomial');
759: $safehole->wrap(\&Math::Random::random_noncentral_chi_square,$safeeval,'&math_random_noncentral_chi_square');
760: $safehole->wrap(\&Math::Random::random_noncentral_f,$safeeval,'&math_random_noncentral_f');
761: $safehole->wrap(\&Math::Random::random_normal,$safeeval,'&math_random_normal');
762: $safehole->wrap(\&Math::Random::random_permutation,$safeeval,'&math_random_permutation');
763: $safehole->wrap(\&Math::Random::random_permuted_index,$safeeval,'&math_random_permuted_index');
764: $safehole->wrap(\&Math::Random::random_uniform,$safeeval,'&math_random_uniform');
765: $safehole->wrap(\&Math::Random::random_poisson,$safeeval,'&math_random_poisson');
766: $safehole->wrap(\&Math::Random::random_uniform_integer,$safeeval,'&math_random_uniform_integer');
767: $safehole->wrap(\&Math::Random::random_negative_binomial,$safeeval,'&math_random_negative_binomial');
768: $safehole->wrap(\&Math::Random::random_binomial,$safeeval,'&math_random_binomial');
769: $safehole->wrap(\&Math::Random::random_seed_from_phrase,$safeeval,'&random_seed_from_phrase');
770: $safehole->wrap(\&Math::Random::random_set_seed_from_phrase,$safeeval,'&random_set_seed_from_phrase');
771: $safehole->wrap(\&Math::Random::random_get_seed,$safeeval,'&random_get_seed');
772: $safehole->wrap(\&Math::Random::random_set_seed,$safeeval,'&random_set_seed');
773: $safehole->wrap(\&Apache::lonxml::error,$safeeval,'&LONCAPA_INTERNAL_ERROR');
774: $safehole->wrap(\&Apache::lonxml::debug,$safeeval,'&LONCAPA_INTERNAL_DEBUG');
775: $safehole->wrap(\&Apache::caparesponse::get_sigrange,$safeeval,'&LONCAPA_INTERNAL_get_sigrange');
776:
777: #need to inspect this class of ops
778: # $safeeval->deny(":base_orig");
779: $safeeval->permit("require");
780: $safeinit .= ';$external::target="'.$target.'";';
781: &Apache::run::run($safeinit,$safeeval);
782: &initialize_rndseed($safeeval);
783: }
784:
785: sub clean_safespace {
786: my ($safeeval) = @_;
787: delete_package_recurse($safeeval->{Root});
788: }
789:
790: sub delete_package_recurse {
791: my ($package) = @_;
792: my @subp;
793: {
794: no strict 'refs';
795: while (my ($key,$val) = each(%{*{"$package\::"}})) {
796: if (!defined($val)) { next; }
797: local (*ENTRY) = $val;
798: if (defined *ENTRY{HASH} && $key =~ /::$/ &&
799: $key ne "main::" && $key ne "<none>::")
800: {
801: my ($p) = $package ne "main" ? "$package\::" : "";
802: ($p .= $key) =~ s/::$//;
803: push(@subp,$p);
804: }
805: }
806: }
807: foreach my $p (@subp) {
808: delete_package_recurse($p);
809: }
810: Symbol::delete_package($package);
811: }
812:
813: sub initialize_rndseed {
814: my ($safeeval)=@_;
815: my $rndseed;
816: my ($symb,$courseid,$domain,$name) = &Apache::lonxml::whichuser();
817: $rndseed=&Apache::lonnet::rndseed($symb,$courseid,$domain,$name);
818: my $safeinit = '$external::randomseed="'.$rndseed.'";';
819: &Apache::lonxml::debug("Setting rndseed to $rndseed");
820: &Apache::run::run($safeinit,$safeeval);
821: }
822:
823: sub default_homework_load {
824: my ($safeeval)=@_;
825: &Apache::lonxml::debug('Loading default_homework');
826: my $default=&Apache::lonnet::getfile('/home/httpd/html/res/adm/includes/default_homework.lcpm');
827: if ($default eq -1) {
828: &Apache::lonxml::error("<b>Unable to find <i>default_homework.lcpm</i></b>");
829: } else {
830: &Apache::run::run($default,$safeeval);
831: $Apache::lonxml::default_homework_loaded=1;
832: }
833: }
834:
835: {
836: my $alarm_depth;
837: sub init_alarm {
838: alarm(0);
839: $alarm_depth=0;
840: }
841:
842: sub start_alarm {
843: if ($alarm_depth<1) {
844: my $old=alarm($Apache::lonnet::perlvar{'lonScriptTimeout'});
845: if ($old) {
846: &Apache::lonxml::error("Cancelled an alarm of $old, this shouldn't occur.");
847: }
848: }
849: $alarm_depth++;
850: }
851:
852: sub end_alarm {
853: $alarm_depth--;
854: if ($alarm_depth<1) { alarm(0); }
855: }
856: }
857: my $metamode_was;
858: sub startredirection {
859: if (!$Apache::lonxml::redirection) {
860: $metamode_was=$Apache::lonxml::metamode;
861: }
862: $Apache::lonxml::metamode=0;
863: $Apache::lonxml::redirection++;
864: push (@Apache::lonxml::outputstack, '');
865: }
866:
867: sub endredirection {
868: if (!$Apache::lonxml::redirection) {
869: &Apache::lonxml::error("Endredirection was called before a startredirection, perhaps you have unbalanced tags. Some debugging information:".join ":",caller);
870: return '';
871: }
872: $Apache::lonxml::redirection--;
873: if (!$Apache::lonxml::redirection) {
874: $Apache::lonxml::metamode=$metamode_was;
875: }
876: pop @Apache::lonxml::outputstack;
877: }
878:
879: sub end_tag {
880: my ($tagstack,$parstack,$token)=@_;
881: pop(@$tagstack);
882: pop(@$parstack);
883: &decreasedepth($token);
884: }
885:
886: sub initdepth {
887: @Apache::lonxml::depthcounter=();
888: $Apache::lonxml::depth=-1;
889: $Apache::lonxml::olddepth=-1;
890: }
891:
892: my @timers;
893: my $lasttime;
894: sub increasedepth {
895: my ($token) = @_;
896: $Apache::lonxml::depth++;
897: $Apache::lonxml::depthcounter[$Apache::lonxml::depth]++;
898: if ($Apache::lonxml::depthcounter[$Apache::lonxml::depth]==1) {
899: $Apache::lonxml::olddepth=$Apache::lonxml::depth;
900: }
901: my $time;
902: if ($Apache::lonxml::debug eq "1") {
903: push(@timers,[&gettimeofday()]);
904: $time=&tv_interval($lasttime);
905: $lasttime=[&gettimeofday()];
906: }
907: my $spacing=' 'x($Apache::lonxml::depth-1);
908: my $curdepth=join('_',@Apache::lonxml::depthcounter);
909: &Apache::lonxml::debug("s$spacing$Apache::lonxml::depth : $Apache::lonxml::olddepth : $curdepth : $token->[1] : $time : \n");
910: #print "<br />s $Apache::lonxml::depth : $Apache::lonxml::olddepth : $curdepth : $token->[1]\n";
911: }
912:
913: sub decreasedepth {
914: my ($token) = @_;
915: $Apache::lonxml::depth--;
916: if ($Apache::lonxml::depth<$Apache::lonxml::olddepth-1) {
917: $#Apache::lonxml::depthcounter--;
918: $Apache::lonxml::olddepth=$Apache::lonxml::depth+1;
919: }
920: if ( $Apache::lonxml::depth < -1) {
921: &Apache::lonxml::warning(&mt("Missing tags, unable to properly run file."));
922: $Apache::lonxml::depth='-1';
923: }
924: my ($timer,$time);
925: if ($Apache::lonxml::debug eq "1") {
926: $timer=pop(@timers);
927: $time=&tv_interval($lasttime);
928: $lasttime=[&gettimeofday()];
929: }
930: my $spacing=' 'x$Apache::lonxml::depth;
931: my $curdepth=join('_',@Apache::lonxml::depthcounter);
932: &Apache::lonxml::debug("e$spacing$Apache::lonxml::depth : $Apache::lonxml::olddepth : $curdepth : $token->[1] : $time : ".&tv_interval($timer)."\n");
933: #print "<br />e $Apache::lonxml::depth : $Apache::lonxml::olddepth : $token->[1] : $curdepth\n";
934: }
935:
936: sub get_id {
937: my ($parstack,$safeeval)=@_;
938: my $id= &Apache::lonxml::get_param('id',$parstack,$safeeval);
939: if ($env{'request.state'} eq 'construct' && $id =~ /(\.|_)/) {
940: &error(&mt("IDs are not allowed to contain "<tt>_</tt>" or "<tt>.</tt>""));
941: }
942: if ($id =~ /^\s*$/) { $id = $Apache::lonxml::curdepth; }
943: return $id;
944: }
945:
946: sub get_all_text_unbalanced {
947: #there is a copy of this in lonpublisher.pm
948: my($tag,$pars)= @_;
949: my $token;
950: my $result='';
951: $tag='<'.$tag.'>';
952: while ($token = $$pars[-1]->get_token) {
953: if (($token->[0] eq 'T')||($token->[0] eq 'C')||($token->[0] eq 'D')) {
954: if ($token->[0] eq 'T' && $token->[2]) {
955: $result.='<![CDATA['.$token->[1].']]>';
956: } else {
957: $result.=$token->[1];
958: }
959: } elsif ($token->[0] eq 'PI') {
960: $result.=$token->[2];
961: } elsif ($token->[0] eq 'S') {
962: $result.=$token->[4];
963: } elsif ($token->[0] eq 'E') {
964: $result.=$token->[2];
965: }
966: if ($result =~ /\Q$tag\E/is) {
967: ($result,my $redo)=$result =~ /(.*)\Q$tag\E(.*)/is;
968: #&Apache::lonxml::debug('Got a winner with leftovers ::'.$2);
969: #&Apache::lonxml::debug('Result is :'.$1);
970: $redo=$tag.$redo;
971: &Apache::lonxml::newparser($pars,\$redo);
972: last;
973: }
974: }
975: return $result
976: }
977:
978: sub increment_counter {
979: my ($increment) = @_;
980: if (defined($increment) && $increment gt 0) {
981: $Apache::lonxml::counter+=$increment;
982: } else {
983: $Apache::lonxml::counter++;
984: }
985: $Apache::lonxml::counter_changed=1;
986: }
987:
988: sub init_counter {
989: if ($env{'request.state'} eq 'construct') {
990: $Apache::lonxml::counter=1;
991: $Apache::lonxml::counter_changed=1;
992: } elsif (defined($env{'form.counter'})) {
993: $Apache::lonxml::counter=$env{'form.counter'};
994: $Apache::lonxml::counter_changed=0;
995: } else {
996: $Apache::lonxml::counter=1;
997: $Apache::lonxml::counter_changed=1;
998: }
999: }
1000:
1001: sub store_counter {
1002: &Apache::lonnet::appenv(('form.counter' => $Apache::lonxml::counter));
1003: $Apache::lonxml::counter_changed=0;
1004: return '';
1005: }
1006:
1007: {
1008: my $state;
1009: sub clear_problem_counter {
1010: undef($state);
1011: &Apache::lonnet::delenv('form.counter');
1012: &Apache::lonxml::init_counter();
1013: &Apache::lonxml::store_counter();
1014: }
1015:
1016: sub remember_problem_counter {
1017: &Apache::lonnet::transfer_profile_to_env();
1018: $state = $env{'form.counter'};
1019: }
1020:
1021: sub restore_problem_counter {
1022: if (defined($state)) {
1023: &Apache::lonnet::appenv(('form.counter' => $state));
1024: }
1025: }
1026: sub get_problem_counter {
1027: if ($Apache::lonxml::counter_changed) { &store_counter() }
1028: &Apache::lonnet::transfer_profile_to_env();
1029: return $env{'form.counter'};
1030: }
1031: }
1032:
1033: sub get_all_text {
1034: my($tag,$pars,$style)= @_;
1035: my $gotfullstack=1;
1036: if (ref($pars) ne 'ARRAY') {
1037: $gotfullstack=0;
1038: $pars=[$pars];
1039: }
1040: if (ref($style) ne 'HASH') {
1041: $style={};
1042: }
1043: my $depth=0;
1044: my $token;
1045: my $result='';
1046: if ( $tag =~ m:^/: ) {
1047: my $tag=substr($tag,1);
1048: #&Apache::lonxml::debug("have:$tag:");
1049: my $top_empty=0;
1050: while (($depth >=0) && ($#$pars > -1) && (!$top_empty)) {
1051: while (($depth >=0) && ($token = $$pars[-1]->get_token)) {
1052: #&Apache::lonxml::debug("e token:$token->[0]:$depth:$token->[1]:".$#$pars.":".$#Apache::lonxml::pwd);
1053: if (($token->[0] eq 'T')||($token->[0] eq 'C')||($token->[0] eq 'D')) {
1054: if ($token->[2]) {
1055: $result.='<![CDATA['.$token->[1].']]>';
1056: } else {
1057: $result.=$token->[1];
1058: }
1059: } elsif ($token->[0] eq 'PI') {
1060: $result.=$token->[2];
1061: } elsif ($token->[0] eq 'S') {
1062: if ($token->[1] =~ /^\Q$tag\E$/i) { $depth++; }
1063: if ($token->[1] =~ /^LONCAPA_INTERNAL_TURN_STYLE_ON$/) { $Apache::lonxml::usestyle=1; }
1064: if ($token->[1] =~ /^LONCAPA_INTERNAL_TURN_STYLE_OFF$/) { $Apache::lonxml::usestyle=0; }
1065: $result.=$token->[4];
1066: } elsif ($token->[0] eq 'E') {
1067: if ( $token->[1] =~ /^\Q$tag\E$/i) { $depth--; }
1068: #skip sending back the last end tag
1069: if ($depth == 0 && exists($$style{'/'.$token->[1]}) && $Apache::lonxml::usestyle) {
1070: my $string=
1071: '<LONCAPA_INTERNAL_TURN_STYLE_OFF end="yes" />'.
1072: $$style{'/'.$token->[1]}.
1073: $token->[2].
1074: '<LONCAPA_INTERNAL_TURN_STYLE_ON />';
1075: &Apache::lonxml::newparser($pars,\$string);
1076: #&Apache::lonxml::debug("reParsing $string");
1077: next;
1078: }
1079: if ($depth > -1) {
1080: $result.=$token->[2];
1081: } else {
1082: $$pars[-1]->unget_token($token);
1083: }
1084: }
1085: }
1086: if (($depth >=0) && ($#$pars == 0) ) { $top_empty=1; }
1087: if (($depth >=0) && ($#$pars > 0) ) {
1088: pop(@$pars);
1089: pop(@Apache::lonxml::pwd);
1090: }
1091: }
1092: if ($top_empty && $depth >= 0) {
1093: #never found the end tag ran out of text, throw error send back blank
1094: &error('Never found end tag for <'.$tag.
1095: '> current string <pre>'.
1096: &HTML::Entities::encode($result,'<>&"').
1097: '</pre>');
1098: if ($gotfullstack) {
1099: my $newstring='</'.$tag.'>'.$result;
1100: &Apache::lonxml::newparser($pars,\$newstring);
1101: }
1102: $result='';
1103: }
1104: } else {
1105: while ($#$pars > -1) {
1106: while ($token = $$pars[-1]->get_token) {
1107: #&Apache::lonxml::debug("s token:$token->[0]:$depth:$token->[1]");
1108: if (($token->[0] eq 'T')||($token->[0] eq 'C')||
1109: ($token->[0] eq 'D')) {
1110: if ($token->[2]) {
1111: $result.='<![CDATA['.$token->[1].']]>';
1112: } else {
1113: $result.=$token->[1];
1114: }
1115: } elsif ($token->[0] eq 'PI') {
1116: $result.=$token->[2];
1117: } elsif ($token->[0] eq 'S') {
1118: if ( $token->[1] =~ /^\Q$tag\E$/i) {
1119: $$pars[-1]->unget_token($token); last;
1120: } else {
1121: $result.=$token->[4];
1122: }
1123: if ($token->[1] =~ /^LONCAPA_INTERNAL_TURN_STYLE_ON$/) { $Apache::lonxml::usestyle=1; }
1124: if ($token->[1] =~ /^LONCAPA_INTERNAL_TURN_STYLE_OFF$/) { $Apache::lonxml::usestyle=0; }
1125: } elsif ($token->[0] eq 'E') {
1126: $result.=$token->[2];
1127: }
1128: }
1129: if (($#$pars > 0) ) {
1130: pop(@$pars);
1131: pop(@Apache::lonxml::pwd);
1132: } else { last; }
1133: }
1134: }
1135: #&Apache::lonxml::debug("Exit:$result:");
1136: return $result
1137: }
1138:
1139: sub newparser {
1140: my ($parser,$contentref,$dir) = @_;
1141: push (@$parser,HTML::LCParser->new($contentref));
1142: $$parser[-1]->xml_mode(1);
1143: $$parser[-1]->marked_sections(1);
1144: if ( $dir eq '' ) {
1145: push (@Apache::lonxml::pwd, $Apache::lonxml::pwd[$#Apache::lonxml::pwd]);
1146: } else {
1147: push (@Apache::lonxml::pwd, $dir);
1148: }
1149: }
1150:
1151: sub parstring {
1152: my ($token) = @_;
1153: my $temp='';
1154: foreach (@{$token->[3]}) {
1155: unless ($_=~/\W/) {
1156: my $val=$token->[2]->{$_};
1157: $val =~ s/([\%\@\\\"\'])/\\$1/g;
1158: $val =~ s/(\$[^{a-zA-Z_])/\\$1/g;
1159: $val =~ s/(\$)$/\\$1/;
1160: #if ($val =~ m/^[\%\@]/) { $val="\\".$val; }
1161: $temp .= "my \$$_=\"$val\";";
1162: }
1163: }
1164: return $temp;
1165: }
1166:
1167: sub extlink {
1168: my ($res,$exact)=@_;
1169: if (!$exact) {
1170: $res=&Apache::lonnet::hreflocation($Apache::lonxml::pwd[-1],$res);
1171: }
1172: push(@Apache::lonxml::extlinks,$res)
1173: }
1174:
1175: sub writeallows {
1176: unless ($#extlinks>=0) { return; }
1177: my $thisurl = &Apache::lonnet::clutter(shift);
1178: if ($env{'httpref.'.$thisurl}) {
1179: $thisurl=$env{'httpref.'.$thisurl};
1180: }
1181: my $thisdir=$thisurl;
1182: $thisdir=~s/\/[^\/]+$//;
1183: my %httpref=();
1184: foreach (@extlinks) {
1185: $httpref{'httpref.'.
1186: &Apache::lonnet::hreflocation($thisdir,$_)}=$thisurl;
1187: }
1188: @extlinks=();
1189: &Apache::lonnet::appenv(%httpref);
1190: }
1191:
1192: sub register_ssi {
1193: my ($url,%form)=@_;
1194: push (@Apache::lonxml::ssi_info,{'url'=>$url,'form'=>\%form});
1195: return '';
1196: }
1197:
1198: sub do_registered_ssi {
1199: foreach my $info (@Apache::lonxml::ssi_info) {
1200: my %form=%{ $info->{'form'}};
1201: my $url=$info->{'url'};
1202: &Apache::lonnet::ssi($url,%form);
1203: }
1204: }
1205: #
1206: # Afterburner handles anchors, highlights and links
1207: #
1208: sub afterburn {
1209: my $result=shift;
1210: &Apache::loncommon::get_unprocessed_cgi($ENV{'QUERY_STRING'},
1211: ['highlight','anchor','link']);
1212: if ($env{'form.highlight'}) {
1213: foreach (split(/\,/,$env{'form.highlight'})) {
1214: my $anchorname=$_;
1215: my $matchthis=$anchorname;
1216: $matchthis=~s/\_+/\\s\+/g;
1217: $result=~s/(\Q$matchthis\E)/\<font color=\"red\"\>$1\<\/font\>/gs;
1218: }
1219: }
1220: if ($env{'form.link'}) {
1221: foreach (split(/\,/,$env{'form.link'})) {
1222: my ($anchorname,$linkurl)=split(/\>/,$_);
1223: my $matchthis=$anchorname;
1224: $matchthis=~s/\_+/\\s\+/g;
1225: $result=~s/(\Q$matchthis\E)/\<a href=\"$linkurl\"\>$1\<\/a\>/gs;
1226: }
1227: }
1228: if ($env{'form.anchor'}) {
1229: my $anchorname=$env{'form.anchor'};
1230: my $matchthis=$anchorname;
1231: $matchthis=~s/\_+/\\s\+/g;
1232: $result=~s/(\Q$matchthis\E)/\<a name=\"$anchorname\"\>$1\<\/a\>/s;
1233: $result.=(<<"ENDSCRIPT");
1234: <script type="text/javascript">
1235: document.location.hash='$anchorname';
1236: </script>
1237: ENDSCRIPT
1238: }
1239: return $result;
1240: }
1241:
1242: sub storefile {
1243: my ($file,$contents)=@_;
1244: &Apache::lonnet::correct_line_ends(\$contents);
1245: if (my $fh=Apache::File->new('>'.$file)) {
1246: print $fh $contents;
1247: $fh->close();
1248: return 1;
1249: } else {
1250: &warning("Unable to save file $file");
1251: return 0;
1252: }
1253: }
1254:
1255: sub createnewhtml {
1256: my $title=&mt('Title of document goes here');
1257: my $body=&mt('Body of document goes here');
1258: my $filecontents=(<<SIMPLECONTENT);
1259: <html>
1260: <head>
1261: <title>$title</title>
1262: </head>
1263: <body bgcolor="#FFFFFF">
1264: $body
1265: </body>
1266: </html>
1267: SIMPLECONTENT
1268: return $filecontents;
1269: }
1270:
1271: sub createnewsty {
1272: my $filecontents=(<<SIMPLECONTENT);
1273: <definetag name="">
1274: <render>
1275: <web></web>
1276: <tex></tex>
1277: </render>
1278: </definetag>
1279: SIMPLECONTENT
1280: return $filecontents;
1281: }
1282:
1283:
1284: sub inserteditinfo {
1285: my ($result,$filecontents,$filetype)=@_;
1286: $filecontents = &HTML::Entities::encode($filecontents,'<>&"');
1287: # my $editheader='<a href="#editsection">Edit below</a><hr />';
1288: my $xml_help = '';
1289: my $initialize='';
1290: if ($filetype eq 'html') {
1291: my $addbuttons=&Apache::lonhtmlcommon::htmlareaaddbuttons();
1292: $initialize=&Apache::lonhtmlcommon::spellheader();
1293: if (!&Apache::lonhtmlcommon::htmlareablocked() &&
1294: &Apache::lonhtmlcommon::htmlareabrowser()) {
1295: $initialize.=(<<FULLPAGE);
1296: <script type="text/javascript">
1297: $addbuttons
1298:
1299: HTMLArea.loadPlugin("FullPage");
1300:
1301: function initDocument() {
1302: var editor=new HTMLArea("filecont",config);
1303: editor.registerPlugin(FullPage);
1304: editor.generate();
1305: }
1306: </script>
1307: FULLPAGE
1308: } else {
1309: $initialize.=(<<FULLPAGE);
1310: <script type="text/javascript">
1311: $addbuttons
1312: function initDocument() {
1313: }
1314: </script>
1315: FULLPAGE
1316: }
1317: $result=~s/\<body([^\>]*)\>/\<body onload="initDocument()" $1\>/i;
1318: $xml_help=&Apache::loncommon::helpLatexCheatsheet();
1319: }
1320: my $cleanbut = '';
1321:
1322: my $titledisplay=&display_title();
1323: my %lt=&Apache::lonlocal::texthash('st' => 'Save this',
1324: 'vi' => 'View',
1325: 'ed' => 'Edit');
1326: my $buttons=(<<BUTTONS);
1327: $cleanbut
1328: <input type="submit" name="savethisfile" accesskey="s" value="$lt{'st'}" />
1329: <input type="submit" name="viewmode" accesskey="v" value="$lt{'vi'}" />
1330: BUTTONS
1331: $buttons.=&Apache::lonhtmlcommon::spelllink('xmledit','filecont');
1332: $buttons.=&Apache::lonhtmlcommon::htmlareaselectactive('filecont');
1333: my $editfooter=(<<ENDFOOTER);
1334: $initialize
1335: <hr />
1336: <a name="editsection" />
1337: <form method="post" name="xmledit">
1338: $xml_help
1339: <input type="hidden" name="editmode" value="$lt{'ed'}" />
1340: $buttons<br />
1341: <textarea style="width:100%" cols="80" rows="44" name="filecont" id="filecont">$filecontents</textarea>
1342: <br />$buttons
1343: <br />
1344: </form>
1345: $titledisplay
1346: </body>
1347: ENDFOOTER
1348: # $result=~s/(\<body[^\>]*\>)/$1$editheader/is;
1349: $result=~s/(\<\/body\>)/$editfooter/is;
1350: return $result;
1351: }
1352:
1353: sub get_target {
1354: my $viewgrades=&Apache::lonnet::allowed('vgr',$env{'request.course.id'});
1355: if ( $env{'request.state'} eq 'published') {
1356: if ( defined($env{'form.grade_target'})
1357: && ($viewgrades == 'F' )) {
1358: return ($env{'form.grade_target'});
1359: } elsif (defined($env{'form.grade_target'})) {
1360: if (($env{'form.grade_target'} eq 'web') ||
1361: ($env{'form.grade_target'} eq 'tex') ) {
1362: return $env{'form.grade_target'}
1363: } else {
1364: return 'web';
1365: }
1366: } else {
1367: return 'web';
1368: }
1369: } elsif ($env{'request.state'} eq 'construct') {
1370: if ( defined($env{'form.grade_target'})) {
1371: return ($env{'form.grade_target'});
1372: } else {
1373: return 'web';
1374: }
1375: } else {
1376: return 'web';
1377: }
1378: }
1379:
1380: sub handler {
1381: my $request=shift;
1382:
1383: my $target=&get_target();
1384:
1385: $Apache::lonxml::debug=$env{'user.debug'};
1386:
1387: &Apache::loncommon::content_type($request,'text/html');
1388: &Apache::loncommon::no_cache($request);
1389: if ($env{'request.state'} eq 'published') {
1390: $request->set_last_modified(&Apache::lonnet::metadata($request->uri,
1391: 'lastrevisiondate'));
1392: }
1393: $request->send_http_header;
1394:
1395: return OK if $request->header_only;
1396:
1397:
1398: my $file=&Apache::lonnet::filelocation("",$request->uri);
1399: my $filetype;
1400: if ($file =~ /\.sty$/) {
1401: $filetype='sty';
1402: } else {
1403: $filetype='html';
1404: }
1405: #
1406: # Edit action? Save file.
1407: #
1408: unless ($env{'request.state'} eq 'published') {
1409: if ($env{'form.savethisfile'}) {
1410: if (&storefile($file,$env{'form.filecont'})) {
1411: &Apache::lonxml::info("<font COLOR=\"#0000FF\">".
1412: &mt('Updated').": ".
1413: &Apache::lonlocal::locallocaltime(time).
1414: " </font>");
1415: }
1416: }
1417: }
1418: my %mystyle;
1419: my $result = '';
1420: my $filecontents=&Apache::lonnet::getfile($file);
1421: if ($filecontents eq -1) {
1422: my $start_page=&Apache::loncommon::start_page('File Error');
1423: my $end_page=&Apache::loncommon::end_page();
1424: my $fnf=&mt('File not found');
1425: $result=(<<ENDNOTFOUND);
1426: $start_page
1427: <b>$fnf: $file</b>
1428: $end_page
1429: ENDNOTFOUND
1430: $filecontents='';
1431: if ($env{'request.state'} ne 'published') {
1432: if ($filetype eq 'sty') {
1433: $filecontents=&createnewsty();
1434: } else {
1435: $filecontents=&createnewhtml();
1436: }
1437: $env{'form.editmode'}='Edit'; #force edit mode
1438: }
1439: } else {
1440: unless ($env{'request.state'} eq 'published') {
1441: if ($filecontents=~/BEGIN LON-CAPA Internal/) {
1442: &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.'));
1443: }
1444: #
1445: # we are in construction space, see if edit mode forced
1446: &Apache::loncommon::get_unprocessed_cgi($ENV{'QUERY_STRING'},
1447: ['editmode']);
1448: }
1449: if (!$env{'form.editmode'} || $env{'form.viewmode'}) {
1450: $result = &Apache::lonxml::xmlparse($request,$target,$filecontents,
1451: '',%mystyle);
1452: undef($Apache::lonhomework::parsing_a_task);
1453: &Apache::loncommon::get_unprocessed_cgi($ENV{'QUERY_STRING'},
1454: ['rawmode']);
1455: if ($env{'form.rawmode'}) { $result = $filecontents; }
1456: }
1457: }
1458:
1459: #
1460: # Edit action? Insert editing commands
1461: #
1462: unless ($env{'request.state'} eq 'published') {
1463: if ($env{'form.editmode'} && (!($env{'form.viewmode'}))) {
1464: my $displayfile=$request->uri;
1465: $displayfile=~s/^\/[^\/]*//;
1466: my %options = ();
1467: if ($env{'environment.remote'} ne 'off') {
1468: $options{'bgcolor'} = '#FFFFFF';
1469: }
1470: my $start_page = &Apache::loncommon::start_page(undef,undef,
1471: \%options);
1472: $result=$start_page.
1473: &Apache::lonxml::message_location().'<h3>'.
1474: $displayfile.
1475: '</h3>'.&Apache::loncommon::end_page();
1476: $result=&inserteditinfo($result,$filecontents,$filetype);
1477: }
1478: }
1479: if ($filetype eq 'html') { &writeallows($request->uri); }
1480:
1481:
1482: &Apache::lonxml::add_messages(\$result);
1483: $request->print($result);
1484:
1485: return OK;
1486: }
1487:
1488: sub display_title {
1489: my $result;
1490: if ($env{'request.state'} eq 'construct') {
1491: my $title=&Apache::lonnet::gettitle();
1492: if (!defined($title) || $title eq '') {
1493: $title = $env{'request.filename'};
1494: $title = substr($title, rindex($title, '/') + 1);
1495: }
1496: $result = "<script type='text/javascript'>top.document.title = '$title - LON-CAPA Construction Space';</script>";
1497: }
1498: return $result;
1499: }
1500:
1501: sub debug {
1502: if ($Apache::lonxml::debug eq "1") {
1503: $|=1;
1504: my $request=$Apache::lonxml::request;
1505: if (!$request) {
1506: eval { $request=Apache->request; };
1507: }
1508: if (!$request) {
1509: eval { $request=Apache2::RequestUtil->request; };
1510: }
1511: $request->print('<font size="-2"><pre>DEBUG:'.&HTML::Entities::encode($_[0],'<>&"')."</pre></font>\n");
1512: #&Apache::lonnet::logthis($_[0]);
1513: }
1514: }
1515:
1516: sub show_error_warn_msg {
1517: if ($env{'request.filename'} eq '/home/httpd/html/res/lib/templates/simpleproblem.problem' &&
1518: &Apache::lonnet::allowed('mdc',$env{'request.course.id'})) {
1519: return 1;
1520: }
1521: return (($Apache::lonxml::debug eq 1) ||
1522: ($env{'request.state'} eq 'construct') ||
1523: ($Apache::lonhomework::browse eq 'F'
1524: &&
1525: $env{'form.show_errors'} eq 'on'));
1526: }
1527:
1528: sub error {
1529: $errorcount++;
1530: if ( &show_error_warn_msg() ) {
1531: # If printing in construction space, put the error inside <pre></pre>
1532: push(@Apache::lonxml::error_messages,
1533: $Apache::lonxml::warnings_error_header.
1534: "<b>ERROR:</b>".join("<br />\n",@_)."<br />\n");
1535: $Apache::lonxml::warnings_error_header='';
1536: } else {
1537: my $errormsg;
1538: my ($symb)=&Apache::lonnet::symbread();
1539: if ( !$symb ) {
1540: #public or browsers
1541: $errormsg=&mt("An error occured while processing this resource. The author has been notified.");
1542: }
1543: my $host=$Apache::lonnet::perlvar{'lonHostID'};
1544: my $msg = join('<br />',(@_,"The error occurred on host <tt>$host</tt>"));
1545: #notify author
1546: &Apache::lonmsg::author_res_msg($env{'request.filename'},$msg);
1547: #notify course
1548: if ( $symb && $env{'request.course.id'} ) {
1549: my $cnum=$env{'course.'.$env{'request.course.id'}.'.num'};
1550: my $cdom=$env{'course.'.$env{'request.course.id'}.'.domain'};
1551: my (undef,%users)=&Apache::lonfeedback::decide_receiver(undef,0,1,1,1);
1552: my $declutter=&Apache::lonnet::declutter($env{'request.filename'});
1553: my @userlist;
1554: foreach (keys %users) {
1555: my ($user,$domain) = split(/:/, $_);
1556: push(@userlist,"$user\@$domain");
1557: my $key=$declutter.'_'.$user.'_'.$domain;
1558: my %lastnotified=&Apache::lonnet::get('nohist_xmlerrornotifications',
1559: [$key],
1560: $cdom,$cnum);
1561: my $now=time;
1562: if ($now-$lastnotified{$key}>86400) {
1563: &Apache::lonmsg::user_normal_msg($user,$domain,
1564: "Error [$declutter]",$msg);
1565: &Apache::lonnet::put('nohist_xmlerrornotifications',
1566: {$key => $now},
1567: $cdom,$cnum);
1568: }
1569: }
1570: if ($env{'request.role.adv'}) {
1571: $errormsg=&mt("An error occured while processing this resource. The course personnel ([_1]) and the author have been notified.",join(', ',@userlist));
1572: } else {
1573: $errormsg=&mt("An error occured while processing this resource. The instructor has been notified.");
1574: }
1575: }
1576: push(@Apache::lonxml::error_messages,"<b>$errormsg</b> <br />");
1577: }
1578: }
1579:
1580: sub warning {
1581: $warningcount++;
1582:
1583: if ($env{'form.grade_target'} ne 'tex') {
1584: if ( &show_error_warn_msg() ) {
1585: push(@Apache::lonxml::warning_messages,
1586: $Apache::lonxml::warnings_error_header.
1587: "<b>W</b>ARNING<b>:</b>".join('<br />',@_)."<br />\n");
1588: $Apache::lonxml::warnings_error_header='';
1589: }
1590: }
1591: }
1592:
1593: sub info {
1594: if ($env{'form.grade_target'} ne 'tex'
1595: && $env{'request.state'} eq 'construct') {
1596: push(@Apache::lonxml::info_messages,join('<br />',@_)."<br />\n");
1597: }
1598: }
1599:
1600: sub message_location {
1601: return '__LONCAPA_INTERNAL_MESSAGE_LOCATION__';
1602: }
1603:
1604: sub add_messages {
1605: my ($msg)=@_;
1606: my $result=join(' ',
1607: @Apache::lonxml::info_messages,
1608: @Apache::lonxml::error_messages,
1609: @Apache::lonxml::warning_messages);
1610: undef(@Apache::lonxml::info_messages);
1611: undef(@Apache::lonxml::error_messages);
1612: undef(@Apache::lonxml::warning_messages);
1613: $$msg=~s/__LONCAPA_INTERNAL_MESSAGE_LOCATION__/$result/;
1614: $$msg=~s/__LONCAPA_INTERNAL_MESSAGE_LOCATION__//g;
1615: }
1616:
1617: sub get_param {
1618: my ($param,$parstack,$safeeval,$context,$case_insensitive) = @_;
1619: if ( ! $context ) { $context = -1; }
1620: my $args ='';
1621: if ( $#$parstack > (-2-$context) ) { $args=$$parstack[$context]; }
1622: if ( ! $Apache::lonxml::usestyle ) {
1623: $args=$Apache::lonxml::style_values.$args;
1624: }
1625: if ( ! $args ) { return undef; }
1626: if ( $case_insensitive ) {
1627: if ($args =~ s/(my \$)(\Q$param\E)(=\")/$1.lc($2).$3/ei) {
1628: return &Apache::run::run("{$args;".'return $'.$param.'}',
1629: $safeeval); #'
1630: } else {
1631: return undef;
1632: }
1633: } else {
1634: if ( $args =~ /my \$\Q$param\E=\"/ ) {
1635: return &Apache::run::run("{$args;".'return $'.$param.'}',
1636: $safeeval); #'
1637: } else {
1638: return undef;
1639: }
1640: }
1641: }
1642:
1643: sub get_param_var {
1644: my ($param,$parstack,$safeeval,$context,$case_insensitive) = @_;
1645: if ( ! $context ) { $context = -1; }
1646: my $args ='';
1647: if ( $#$parstack > (-2-$context) ) { $args=$$parstack[$context]; }
1648: if ( ! $Apache::lonxml::usestyle ) {
1649: $args=$Apache::lonxml::style_values.$args;
1650: }
1651: &Apache::lonxml::debug("Args are $args param is $param");
1652: if ($case_insensitive) {
1653: if (! ($args=~s/(my \$)(\Q$param\E)(=\")/$1.lc($2).$3/ei)) {
1654: return undef;
1655: }
1656: } elsif ( $args !~ /my \$\Q$param\E=\"/ ) { return undef; }
1657: my $value=&Apache::run::run("{$args;".'return $'.$param.'}',$safeeval); #'
1658: &Apache::lonxml::debug("first run is $value");
1659: if ($value =~ /^[\$\@\%][a-zA-Z_]\w*$/) {
1660: &Apache::lonxml::debug("doing second");
1661: my @result=&Apache::run::run("return $value",$safeeval,1);
1662: if (!defined($result[0])) {
1663: return $value
1664: } else {
1665: if (wantarray) { return @result; } else { return $result[0]; }
1666: }
1667: } else {
1668: return $value;
1669: }
1670: }
1671:
1672: sub register_insert {
1673: my @data = split /\n/, &Apache::lonnet::getfile('/home/httpd/lonTabs/insertlist.tab');
1674: my $i;
1675: my $tagnum=0;
1676: my @order;
1677: for ($i=0;$i < $#data; $i++) {
1678: my $line = $data[$i];
1679: if ( $line =~ /^\#/ || $line =~ /^\s*\n/) { next; }
1680: if ( $line =~ /TABLE/ ) { last; }
1681: my ($tag,$descrip,$color,$function,$show,$helpfile,$helpdesc) = split(/,/, $line);
1682: if ($tag) {
1683: $insertlist{"$tagnum.tag"} = $tag;
1684: $insertlist{"$tagnum.description"} = $descrip;
1685: $insertlist{"$tagnum.color"} = $color;
1686: $insertlist{"$tagnum.function"} = $function;
1687: if (!defined($show)) { $show='yes'; }
1688: $insertlist{"$tagnum.show"}= $show;
1689: $insertlist{"$tagnum.helpfile"} = $helpfile;
1690: $insertlist{"$tagnum.helpdesc"} = $helpdesc;
1691: $insertlist{"$tag.num"}=$tagnum;
1692: $tagnum++;
1693: }
1694: }
1695: $i++; #skipping TABLE line
1696: $tagnum = 0;
1697: for (;$i < $#data;$i++) {
1698: my $line = $data[$i];
1699: my ($mnemonic,@which) = split(/ +/,$line);
1700: my $tag = $insertlist{"$tagnum.tag"};
1701: for (my $j=0;$j <=$#which;$j++) {
1702: if ( $which[$j] eq 'Y' ) {
1703: if ($insertlist{"$j.show"} ne 'no') {
1704: push(@{ $insertlist{"$tag.which"} },$j);
1705: }
1706: }
1707: }
1708: $tagnum++;
1709: }
1710: }
1711:
1712: sub description {
1713: my ($token)=@_;
1714: my $tagnum;
1715: my $tag=$token->[1];
1716: foreach my $namespace (reverse @Apache::lonxml::namespace) {
1717: my $testtag=$namespace.'::'.$tag;
1718: $tagnum=$insertlist{"$testtag.num"};
1719: if (defined($tagnum)) { last; }
1720: }
1721: if (!defined ($tagnum)) { $tagnum=$Apache::lonxml::insertlist{"$tag.num"}; }
1722: return $insertlist{$tagnum.'.description'};
1723: }
1724:
1725: # Returns a list containing the help file, and the description
1726: sub helpinfo {
1727: my ($token)=@_;
1728: my $tagnum;
1729: my $tag=$token->[1];
1730: foreach my $namespace (reverse @Apache::lonxml::namespace) {
1731: my $testtag=$namespace.'::'.$tag;
1732: $tagnum=$insertlist{"$testtag.num"};
1733: if (defined($tagnum)) { last; }
1734: }
1735: if (!defined ($tagnum)) { $tagnum=$Apache::lonxml::insertlist{"$tag.num"}; }
1736: return ($insertlist{$tagnum.'.helpfile'}, $insertlist{$tagnum.'.helpdesc'});
1737: }
1738:
1739: # ----------------------------------------------------------------- whichuser
1740: # returns a list of $symb, $courseid, $domain, $name that is correct for
1741: # calls to lonnet functions for this setup.
1742: # - looks for form.grade_ parameters
1743: sub whichuser {
1744: my ($passedsymb)=@_;
1745: my ($symb,$courseid,$domain,$name,$publicuser);
1746: if (defined($env{'form.grade_symb'})) {
1747: my ($tmp_courseid)=
1748: &Apache::loncommon::get_env_multiple('form.grade_courseid');
1749: my $allowed=&Apache::lonnet::allowed('vgr',$tmp_courseid);
1750: if (!$allowed &&
1751: exists($env{'request.course.sec'}) &&
1752: $env{'request.course.sec'} !~ /^\s*$/) {
1753: $allowed=&Apache::lonnet::allowed('vgr',$tmp_courseid.
1754: '/'.$env{'request.course.sec'});
1755: }
1756: if ($allowed) {
1757: ($symb)=&Apache::loncommon::get_env_multiple('form.grade_symb');
1758: $courseid=$tmp_courseid;
1759: ($domain)=&Apache::loncommon::get_env_multiple('form.grade_domain');
1760: ($name)=&Apache::loncommon::get_env_multiple('form.grade_username');
1761: return ($symb,$courseid,$domain,$name,$publicuser);
1762: }
1763: }
1764: if (!$passedsymb) {
1765: $symb=&Apache::lonnet::symbread();
1766: } else {
1767: $symb=$passedsymb;
1768: }
1769: $courseid=$env{'request.course.id'};
1770: $domain=$env{'user.domain'};
1771: $name=$env{'user.name'};
1772: if ($name eq 'public' && $domain eq 'public') {
1773: if (!defined($env{'form.username'})) {
1774: $env{'form.username'}.=time.rand(10000000);
1775: }
1776: $name.=$env{'form.username'};
1777: }
1778: return ($symb,$courseid,$domain,$name,$publicuser);
1779: }
1780:
1781: 1;
1782: __END__
1783:
1784:
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