1: # The LearningOnline Network with CAPA
2: # XML Parser Module
3: #
4: # $Id: lonxml.pm,v 1.448 2007/06/11 20:52:40 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 $warningcount);
44: use strict;
45: use LONCAPA;
46: use HTML::LCParser();
47: use HTML::TreeBuilder();
48: use HTML::Entities();
49: use Safe();
50: use Safe::Hole();
51: use Math::Cephes();
52: use Math::Random();
53: use Opcode();
54: use POSIX qw(strftime);
55: use Time::HiRes qw( gettimeofday tv_interval );
56: use Symbol();
57:
58: sub register {
59: my ($space,@taglist) = @_;
60: foreach my $temptag (@taglist) {
61: push(@{ $Apache::lonxml::alltags{$temptag} },$space);
62: }
63: }
64:
65: sub deregister {
66: my ($space,@taglist) = @_;
67: foreach my $temptag (@taglist) {
68: my $tempspace = $Apache::lonxml::alltags{$temptag}[-1];
69: if ($tempspace eq $space) {
70: pop(@{ $Apache::lonxml::alltags{$temptag} });
71: }
72: }
73: #&printalltags();
74: }
75:
76: use Apache::Constants qw(:common);
77: use Apache::lontexconvert();
78: use Apache::style();
79: use Apache::run();
80: use Apache::londefdef();
81: use Apache::scripttag();
82: use Apache::languagetags();
83: use Apache::edit();
84: use Apache::inputtags();
85: use Apache::outputtags();
86: use Apache::lonnet;
87: use Apache::File();
88: use Apache::loncommon();
89: use Apache::lonfeedback();
90: use Apache::lonmsg();
91: use Apache::loncacc();
92: use Apache::lonmaxima();
93: use Apache::lonlocal;
94:
95: #================================================== Main subroutine: xmlparse
96: #debugging control, to turn on debugging modify the correct handler
97: $Apache::lonxml::debug=0;
98:
99: # keeps count of the number of warnings and errors generated in a parse
100: $warningcount=0;
101: $errorcount=0;
102:
103: #path to the directory containing the file currently being processed
104: @pwd=();
105:
106: #these two are used for capturing a subset of the output for later processing,
107: #don't touch them directly use &startredirection and &endredirection
108: @outputstack = ();
109: $redirection = 0;
110:
111: #controls wheter the <import> tag actually does
112: $import = 1;
113: @extlinks=();
114:
115: # meta mode is a bit weird only some output is to be turned off
116: #<output> tag turns metamode off (defined in londefdef.pm)
117: $metamode = 0;
118:
119: # turns on and of run::evaluate actually derefencing var refs
120: $evaluate = 1;
121:
122: # data structure for eidt mode, determines what tags can go into what other tags
123: %insertlist=();
124:
125: # stores the list of active tag namespaces
126: @namespace=();
127:
128: # stores all Scrit Vars displays for later showing
129: my @script_var_displays=();
130:
131: # a pointer the the Apache request object
132: $Apache::lonxml::request='';
133:
134: # a problem number counter, and check on ether it is used
135: $Apache::lonxml::counter=1;
136: $Apache::lonxml::counter_changed=0;
137:
138: #internal check on whether to look at style defs
139: $Apache::lonxml::usestyle=1;
140:
141: #locations used to store the parameter string for style substitutions
142: $Apache::lonxml::style_values='';
143: $Apache::lonxml::style_end_values='';
144:
145: #array of ssi calls that need to occur after we are done parsing
146: @Apache::lonxml::ssi_info=();
147:
148: #should we do the postag variable interpolation
149: $Apache::lonxml::post_evaluate=1;
150:
151: #a header message to emit in the case of any generated warning or errors
152: $Apache::lonxml::warnings_error_header='';
153:
154: # Control whether or not LaTeX symbols should be substituted for their
155: # \ style equivalents...this may be turned off e.g. in an verbatim
156: # environment.
157:
158: $Apache::lonxml::substitute_LaTeX_symbols = 1; # Starts out on.
159:
160: sub enable_LaTeX_substitutions {
161: $Apache::lonxml::substitute_LaTeX_symbols = 1;
162: }
163: sub disable_LaTeX_substitutions {
164: $Apache::lonxml::substitute_LaTeX_symbols = 0;
165: }
166:
167: sub xmlend {
168: my ($target,$parser)=@_;
169: my $mode='xml';
170: my $status='OPEN';
171: if ($Apache::lonhomework::parsing_a_problem ||
172: $Apache::lonhomework::parsing_a_task ) {
173: $mode='problem';
174: $status=$Apache::inputtags::status[-1];
175: }
176: my $discussion;
177: &Apache::loncommon::get_unprocessed_cgi($ENV{'QUERY_STRING'},
178: ['LONCAPA_INTERNAL_no_discussion']);
179: if (! exists($env{'form.LONCAPA_INTERNAL_no_discussion'}) ||
180: $env{'form.LONCAPA_INTERNAL_no_discussion'} ne 'true') {
181: $discussion=&Apache::lonfeedback::list_discussion($mode,$status);
182: }
183: if ($target eq 'tex') {
184: $discussion.='<tex>\keephidden{ENDOFPROBLEM}\vskip 0.5mm\noindent\makebox[\textwidth/$number_of_columns][b]{\hrulefill}\end{document}</tex>';
185: &Apache::lonxml::newparser($parser,\$discussion,'');
186: return '';
187: }
188:
189: return $discussion;
190: }
191:
192: sub tokeninputfield {
193: my $defhost=$Apache::lonnet::perlvar{'lonHostID'};
194: $defhost=~tr/a-z/A-Z/;
195: return (<<ENDINPUTFIELD)
196: <script type="text/javascript">
197: function updatetoken() {
198: var comp=new Array;
199: var barcode=unescape(document.tokeninput.barcode.value);
200: comp=barcode.split('*');
201: if (typeof(comp[0])!="undefined") {
202: document.tokeninput.codeone.value=comp[0];
203: }
204: if (typeof(comp[1])!="undefined") {
205: document.tokeninput.codetwo.value=comp[1];
206: }
207: if (typeof(comp[2])!="undefined") {
208: comp[2]=comp[2].toUpperCase();
209: document.tokeninput.codethree.value=comp[2];
210: }
211: document.tokeninput.barcode.value='';
212: }
213: </script>
214: <form method="post" name="tokeninput">
215: <table border="2" bgcolor="#FFFFBB">
216: <tr><th>DocID Checkin</th></tr>
217: <tr><td>
218: <table>
219: <tr>
220: <td>Scan in Barcode</td>
221: <td><input type="text" size="22" name="barcode"
222: onChange="updatetoken()"/></td>
223: </tr>
224: <tr><td><i>or</i> Type in DocID</td>
225: <td>
226: <input type="text" size="5" name="codeone" />
227: <b><font size="+2">*</font></b>
228: <input type="text" size="5" name="codetwo" />
229: <b><font size="+2">*</font></b>
230: <input type="text" size="10" name="codethree" value="$defhost"
231: onChange="this.value=this.value.toUpperCase()" />
232: </td></tr>
233: </table>
234: </td></tr>
235: <tr><td><input type="submit" value="Check in DocID" /></td></tr>
236: </table>
237: </form>
238: ENDINPUTFIELD
239: }
240:
241: sub maketoken {
242: my ($symb,$tuname,$tudom,$tcrsid)=@_;
243: unless ($symb) {
244: $symb=&Apache::lonnet::symbread();
245: }
246: unless ($tuname) {
247: $tuname=$env{'user.name'};
248: $tudom=$env{'user.domain'};
249: $tcrsid=$env{'request.course.id'};
250: }
251:
252: return &Apache::lonnet::checkout($symb,$tuname,$tudom,$tcrsid);
253: }
254:
255: sub printtokenheader {
256: my ($target,$token,$tsymb,$tcrsid,$tudom,$tuname)=@_;
257: unless ($token) { return ''; }
258:
259: my ($symb,$courseid,$domain,$name) = &Apache::lonnet::whichuser();
260: unless ($tsymb) {
261: $tsymb=$symb;
262: }
263: unless ($tuname) {
264: $tuname=$name;
265: $tudom=$domain;
266: $tcrsid=$courseid;
267: }
268:
269: my $plainname=&Apache::loncommon::plainname($tuname,$tudom);
270:
271: if ($target eq 'web') {
272: my %idhash=&Apache::lonnet::idrget($tudom,($tuname));
273: return
274: '<img align="right" src="/cgi-bin/barcode.png?encode='.$token.'" />'.
275: &mt('Checked out for').' '.$plainname.
276: '<br />'.&mt('User').': '.$tuname.' at '.$tudom.
277: '<br />'.&mt('ID').': '.$idhash{$tuname}.
278: '<br />'.&mt('CourseID').': '.$tcrsid.
279: '<br />'.&mt('Course').': '.$env{'course.'.$tcrsid.'.description'}.
280: '<br />'.&mt('DocID').': '.$token.
281: '<br />'.&mt('Time').': '.&Apache::lonlocal::locallocaltime().'<hr />';
282: } else {
283: return $token;
284: }
285: }
286:
287: sub printalltags {
288: my $temp;
289: foreach $temp (sort keys %Apache::lonxml::alltags) {
290: &Apache::lonxml::debug("$temp -- ".
291: join(',',@{ $Apache::lonxml::alltags{$temp} }));
292: }
293: }
294:
295: sub xmlparse {
296: my ($request,$target,$content_file_string,$safeinit,%style_for_target) = @_;
297:
298: &setup_globals($request,$target);
299: &Apache::inputtags::initialize_inputtags();
300: &Apache::bridgetask::initialize_bridgetask();
301: &Apache::outputtags::initialize_outputtags();
302: &Apache::edit::initialize_edit();
303: &Apache::londefdef::initialize_londefdef();
304:
305: #
306: # do we have a course style file?
307: #
308:
309: if ($env{'request.course.id'} && $env{'request.state'} ne 'construct') {
310: my $bodytext=
311: $env{'course.'.$env{'request.course.id'}.'.default_xml_style'};
312: if ($bodytext) {
313: foreach my $file (split(',',$bodytext)) {
314: my $location=&Apache::lonnet::filelocation('',$file);
315: my $styletext=&Apache::lonnet::getfile($location);
316: if ($styletext ne '-1') {
317: %style_for_target = (%style_for_target,
318: &Apache::style::styleparser($target,$styletext));
319: }
320: }
321: }
322: } elsif ($env{'construct.style'} && ($env{'request.state'} eq 'construct')) {
323: my $location=&Apache::lonnet::filelocation('',$env{'construct.style'});
324: my $styletext=&Apache::lonnet::getfile($location);
325: if ($styletext ne '-1') {
326: %style_for_target = (%style_for_target,
327: &Apache::style::styleparser($target,$styletext));
328: }
329: }
330: #&printalltags();
331: my @pars = ();
332: my $pwd=$env{'request.filename'};
333: $pwd =~ s:/[^/]*$::;
334: &newparser(\@pars,\$content_file_string,$pwd);
335:
336: my $safeeval = new Safe;
337: my $safehole = new Safe::Hole;
338: &init_safespace($target,$safeeval,$safehole,$safeinit);
339: #-------------------- Redefinition of the target in the case of compound target
340:
341: ($target, my @tenta) = split('&&',$target);
342:
343: my @stack = ();
344: my @parstack = ();
345: &initdepth();
346: &init_alarm();
347: my $finaloutput = &inner_xmlparse($target,\@stack,\@parstack,\@pars,
348: $safeeval,\%style_for_target,1);
349:
350: if (@stack) {
351: &warning("At end of file some tags were still left unclosed, ".
352: '<tt><'.join('></tt>, <tt><',reverse(@stack)).
353: '></tt>');
354: }
355: if ($env{'request.uri'}) {
356: &writeallows($env{'request.uri'});
357: }
358: &do_registered_ssi();
359: if ($Apache::lonxml::counter_changed) { &store_counter() }
360:
361: &clean_safespace($safeeval);
362:
363: if (@script_var_displays) {
364: $finaloutput .= join('',@script_var_displays);
365: undef(@script_var_displays);
366: }
367:
368: if ($env{'form.return_only_error_and_warning_counts'}) {
369: return "$errorcount:$warningcount";
370: }
371: return $finaloutput;
372: }
373:
374: sub latex_special_symbols {
375: my ($string,$where)=@_;
376: #
377: # If e.g. in verbatim mode, then don't substitute.
378: # but return original string.
379: #
380: if (!($Apache::lonxml::substitute_LaTeX_symbols)) {
381: return $string;
382: }
383: if ($where eq 'header') {
384: $string =~ s/\\/\$\\backslash\$/g; # \ -> $\backslash$ per LaTex line by line pg 10.
385: $string =~ s/(\$|%|\{|\})/\\$1/g;
386: $string=&Apache::lonprintout::character_chart($string);
387: # any & or # leftover should be safe to just escape
388: $string=~s/([^\\])\&/$1\\\&/g;
389: $string=~s/([^\\])\#/$1\\\#/g;
390: $string =~ s/_/\\_/g; # _ -> \_
391: $string =~ s/\^/\\\^{}/g; # ^ -> \^{}
392: } else {
393: $string=~s/\\/\\ensuremath{\\backslash}/g;
394: $string=~s/\\\%|\%/\\\%/g;
395: $string=~s/\\{|{/\\{/g;
396: $string=~s/\\}|}/\\}/g;
397: $string=~s/\\ensuremath\\{\\backslash\\}/\\ensuremath{\\backslash}/g;
398: $string=~s/\\\$|\$/\\\$/g;
399: $string=~s/\\\_|\_/\\\_/g;
400: $string=~s/([^\\]|^)(\~|\^)/$1\\$2\\strut /g;
401: $string=~s/(>|<)/\\ensuremath\{$1\}/g; #more or less
402: $string=&Apache::lonprintout::character_chart($string);
403: # any & or # leftover should be safe to just escape
404: $string=~s/\\\&|\&/\\\&/g;
405: $string=~s/\\\#|\#/\\\#/g;
406: $string=~s/\|/\$\\mid\$/g;
407: #single { or } How to escape?
408: }
409: return $string;
410: }
411:
412: sub inner_xmlparse {
413: my ($target,$stack,$parstack,$pars,$safeeval,$style_for_target,$start)=@_;
414: my $finaloutput = '';
415: my $result;
416: my $token;
417: my $dontpop=0;
418: my $startredirection = $Apache::lonxml::redirection;
419: while ( $#$pars > -1 ) {
420: while ($token = $$pars['-1']->get_token) {
421: if (($token->[0] eq 'T') || ($token->[0] eq 'C') ) {
422: if ($metamode<1) {
423: my $text=$token->[1];
424: if ($token->[0] eq 'C' && $target eq 'tex') {
425: $text = '';
426: # $text = '%'.$text."\n";
427: }
428: $result.=$text;
429: }
430: } elsif (($token->[0] eq 'D')) {
431: if ($metamode<1 && $target eq 'web') {
432: my $text=$token->[1];
433: $result.=$text;
434: }
435: } elsif ($token->[0] eq 'PI') {
436: if ($metamode<1 && $target eq 'web') {
437: $result=$token->[2];
438: }
439: } elsif ($token->[0] eq 'S') {
440: # add tag to stack
441: push (@$stack,$token->[1]);
442: # add parameters list to another stack
443: push (@$parstack,&parstring($token));
444: &increasedepth($token);
445: if ($Apache::lonxml::usestyle &&
446: exists($$style_for_target{$token->[1]})) {
447: $Apache::lonxml::usestyle=0;
448: my $string=$$style_for_target{$token->[1]}.
449: '<LONCAPA_INTERNAL_TURN_STYLE_ON />';
450: &Apache::lonxml::newparser($pars,\$string);
451: $Apache::lonxml::style_values=$$parstack[-1];
452: $Apache::lonxml::style_end_values=$$parstack[-1];
453: } else {
454: $result = &callsub("start_$token->[1]", $target, $token, $stack,
455: $parstack, $pars, $safeeval, $style_for_target);
456: }
457: } elsif ($token->[0] eq 'E') {
458: if ($Apache::lonxml::usestyle &&
459: exists($$style_for_target{'/'."$token->[1]"})) {
460: $Apache::lonxml::usestyle=0;
461: my $string=$$style_for_target{'/'.$token->[1]}.
462: '<LONCAPA_INTERNAL_TURN_STYLE_ON end="'.$token->[1].'" />';
463: &Apache::lonxml::newparser($pars,\$string);
464: $Apache::lonxml::style_values=$Apache::lonxml::style_end_values;
465: $Apache::lonxml::style_end_values='';
466: $dontpop=1;
467: } else {
468: #clear out any tags that didn't end
469: while ($token->[1] ne $$stack['-1'] && ($#$stack > -1)) {
470: my $lasttag=$$stack[-1];
471: if ($token->[1] =~ /^\Q$lasttag\E$/i) {
472: &Apache::lonxml::warning('Using tag </'.$token->[1].'> on line '.$token->[3].' as end tag to <'.$$stack[-1].'>');
473: last;
474: } else {
475: &Apache::lonxml::warning('Found tag </'.$token->[1].'> on line '.$token->[3].' when looking for </'.$$stack[-1].'> in file');
476: &end_tag($stack,$parstack,$token);
477: }
478: }
479: $result = &callsub("end_$token->[1]", $target, $token, $stack,
480: $parstack, $pars,$safeeval, $style_for_target);
481: }
482: } else {
483: &Apache::lonxml::error("Unknown token event :$token->[0]:$token->[1]:");
484: }
485: #evaluate variable refs in result
486: if ($Apache::lonxml::post_evaluate &&$result ne "") {
487: my $extras;
488: if (!$Apache::lonxml::usestyle) {
489: $extras=$Apache::lonxml::style_values;
490: }
491: if ( $#$parstack > -1 ) {
492: $result=&Apache::run::evaluate($result,$safeeval,$extras.$$parstack[-1]);
493: } else {
494: $result= &Apache::run::evaluate($result,$safeeval,$extras);
495: }
496: }
497: $Apache::lonxml::post_evaluate=1;
498:
499: if (($token->[0] eq 'T') || ($token->[0] eq 'C') || ($token->[0] eq 'D') ) {
500: #Style file definitions should be correct
501: if ($target eq 'tex' && ($Apache::lonxml::usestyle)) {
502: $result=&latex_special_symbols($result);
503: }
504: }
505:
506: if ($Apache::lonxml::redirection) {
507: $Apache::lonxml::outputstack['-1'] .= $result;
508: } else {
509: $finaloutput.=$result;
510: }
511: $result = '';
512:
513: if ($token->[0] eq 'E' && !$dontpop) {
514: &end_tag($stack,$parstack,$token);
515: }
516: $dontpop=0;
517: }
518: if ($#$pars > -1) {
519: pop @$pars;
520: pop @Apache::lonxml::pwd;
521: }
522: }
523:
524: # if ($target eq 'meta') {
525: # $finaloutput.=&endredirection;
526: # }
527:
528: if ( $start && $target eq 'grade') { &endredirection(); }
529: if ( $Apache::lonxml::redirection > $startredirection) {
530: while ($Apache::lonxml::redirection > $startredirection) {
531: $finaloutput .= &endredirection();
532: }
533: }
534: if (($ENV{'QUERY_STRING'}) && ($target eq 'web')) {
535: $finaloutput=&afterburn($finaloutput);
536: }
537: return $finaloutput;
538: }
539:
540: ##
541: ## Looks to see if there is a subroutine defined for this tag. If so, call it,
542: ## otherwise do not call it as we do not know what it is.
543: ##
544: sub callsub {
545: my ($sub,$target,$token,$tagstack,$parstack,$parser,$safeeval,$style)=@_;
546: my $currentstring='';
547: my $nodefault;
548: {
549: my $sub1;
550: no strict 'refs';
551: my $tag=$token->[1];
552: # get utterly rid of extended html tags
553: if ($tag=~/^x\-/i) { return ''; }
554: my $space=$Apache::lonxml::alltags{$tag}[-1];
555: if (!$space) {
556: $tag=~tr/A-Z/a-z/;
557: $sub=~tr/A-Z/a-z/;
558: $space=$Apache::lonxml::alltags{$tag}[-1]
559: }
560:
561: my $deleted=0;
562: if (($token->[0] eq 'S') && ($target eq 'modified')) {
563: $deleted=&Apache::edit::handle_delete($space,$target,$token,$tagstack,
564: $parstack,$parser,$safeeval,
565: $style);
566: }
567: if (!$deleted) {
568: if ($space) {
569: #&Apache::lonxml::debug("Calling sub $sub in $space $metamode");
570: $sub1="$space\:\:$sub";
571: ($currentstring,$nodefault) = &$sub1($target,$token,$tagstack,
572: $parstack,$parser,$safeeval,
573: $style);
574: } else {
575: if ($target eq 'tex') {
576: # throw away tag name
577: return '';
578: }
579: #&Apache::lonxml::debug("NOT Calling sub $sub in $space $metamode");
580: if ($metamode <1) {
581: if (defined($token->[4]) && ($metamode < 1)) {
582: $currentstring = $token->[4];
583: } else {
584: $currentstring = $token->[2];
585: }
586: }
587: }
588: # &Apache::lonxml::debug("nodefalt:$nodefault:");
589: if ($currentstring eq '' && $nodefault eq '') {
590: if ($target eq 'edit') {
591: #&Apache::lonxml::debug("doing default edit for $token->[1]");
592: if ($token->[0] eq 'S') {
593: $currentstring = &Apache::edit::tag_start($target,$token);
594: } elsif ($token->[0] eq 'E') {
595: $currentstring = &Apache::edit::tag_end($target,$token);
596: }
597: }
598: }
599: if ($target eq 'modified' && $nodefault eq '') {
600: if ($currentstring eq '') {
601: if ($token->[0] eq 'S') {
602: $currentstring = $token->[4];
603: } elsif ($token->[0] eq 'E') {
604: $currentstring = $token->[2];
605: } else {
606: $currentstring = $token->[2];
607: }
608: }
609: if ($token->[0] eq 'S') {
610: $currentstring.=&Apache::edit::handle_insert();
611: } elsif ($token->[0] eq 'E') {
612: $currentstring.=&Apache::edit::handle_insertafter($token->[1]);
613: }
614: }
615: }
616: use strict 'refs';
617: }
618: return $currentstring;
619: }
620:
621: sub setup_globals {
622: my ($request,$target)=@_;
623: $Apache::lonxml::request=$request;
624: $errorcount=0;
625: $warningcount=0;
626: $Apache::lonxml::default_homework_loaded=0;
627: $Apache::lonxml::usestyle=1;
628: &init_counter();
629: @Apache::lonxml::pwd=();
630: @Apache::lonxml::extlinks=();
631: @script_var_displays=();
632: @Apache::lonxml::ssi_info=();
633: $Apache::lonxml::post_evaluate=1;
634: $Apache::lonxml::warnings_error_header='';
635: $Apache::lonxml::substitute_LaTeX_symbols = 1;
636: if ($target eq 'meta') {
637: $Apache::lonxml::redirection = 0;
638: $Apache::lonxml::metamode = 1;
639: $Apache::lonxml::evaluate = 1;
640: $Apache::lonxml::import = 0;
641: } elsif ($target eq 'answer') {
642: $Apache::lonxml::redirection = 0;
643: $Apache::lonxml::metamode = 1;
644: $Apache::lonxml::evaluate = 1;
645: $Apache::lonxml::import = 1;
646: } elsif ($target eq 'grade') {
647: &startredirection(); #ended in inner_xmlparse on exit
648: $Apache::lonxml::metamode = 0;
649: $Apache::lonxml::evaluate = 1;
650: $Apache::lonxml::import = 1;
651: } elsif ($target eq 'modified') {
652: $Apache::lonxml::redirection = 0;
653: $Apache::lonxml::metamode = 0;
654: $Apache::lonxml::evaluate = 0;
655: $Apache::lonxml::import = 0;
656: } elsif ($target eq 'edit') {
657: $Apache::lonxml::redirection = 0;
658: $Apache::lonxml::metamode = 0;
659: $Apache::lonxml::evaluate = 0;
660: $Apache::lonxml::import = 0;
661: } elsif ($target eq 'analyze') {
662: $Apache::lonxml::redirection = 0;
663: $Apache::lonxml::metamode = 0;
664: $Apache::lonxml::evaluate = 1;
665: $Apache::lonxml::import = 1;
666: } else {
667: $Apache::lonxml::redirection = 0;
668: $Apache::lonxml::metamode = 0;
669: $Apache::lonxml::evaluate = 1;
670: $Apache::lonxml::import = 1;
671: }
672: }
673:
674: sub init_safespace {
675: my ($target,$safeeval,$safehole,$safeinit) = @_;
676: $safeeval->deny_only(':dangerous');
677: $safeeval->reval('use Math::Complex;');
678: $safeeval->permit_only(":default");
679: $safeeval->permit("entereval");
680: $safeeval->permit(":base_math");
681: $safeeval->permit("sort");
682: $safeeval->permit("time");
683: $safeeval->deny("rand");
684: $safeeval->deny("srand");
685: $safeeval->deny(":base_io");
686: $safehole->wrap(\&Apache::scripttag::xmlparse,$safeeval,'&xmlparse');
687: $safehole->wrap(\&Apache::outputtags::multipart,$safeeval,'&multipart');
688: $safehole->wrap(\&Apache::lonnet::EXT,$safeeval,'&EXT');
689: $safehole->wrap(\&Apache::chemresponse::chem_standard_order,$safeeval,
690: '&chem_standard_order');
691: $safehole->wrap(\&Apache::response::check_status,$safeeval,'&check_status');
692:
693: $safehole->wrap(\&Apache::lonmaxima::maxima_eval,$safeeval,'&maxima_eval');
694: $safehole->wrap(\&Apache::lonmaxima::maxima_check,$safeeval,'&maxima_check');
695: $safehole->wrap(\&Apache::lonmaxima::maxima_cas_formula_fix,$safeeval,
696: '&maxima_cas_formula_fix');
697:
698: $safehole->wrap(\&Apache::caparesponse::capa_formula_fix,$safeeval,
699: '&capa_formula_fix');
700:
701: $safehole->wrap(\&Math::Cephes::asin,$safeeval,'&asin');
702: $safehole->wrap(\&Math::Cephes::acos,$safeeval,'&acos');
703: $safehole->wrap(\&Math::Cephes::atan,$safeeval,'&atan');
704: $safehole->wrap(\&Math::Cephes::sinh,$safeeval,'&sinh');
705: $safehole->wrap(\&Math::Cephes::cosh,$safeeval,'&cosh');
706: $safehole->wrap(\&Math::Cephes::tanh,$safeeval,'&tanh');
707: $safehole->wrap(\&Math::Cephes::asinh,$safeeval,'&asinh');
708: $safehole->wrap(\&Math::Cephes::acosh,$safeeval,'&acosh');
709: $safehole->wrap(\&Math::Cephes::atanh,$safeeval,'&atanh');
710: $safehole->wrap(\&Math::Cephes::erf,$safeeval,'&erf');
711: $safehole->wrap(\&Math::Cephes::erfc,$safeeval,'&erfc');
712: $safehole->wrap(\&Math::Cephes::j0,$safeeval,'&j0');
713: $safehole->wrap(\&Math::Cephes::j1,$safeeval,'&j1');
714: $safehole->wrap(\&Math::Cephes::jn,$safeeval,'&jn');
715: $safehole->wrap(\&Math::Cephes::jv,$safeeval,'&jv');
716: $safehole->wrap(\&Math::Cephes::y0,$safeeval,'&y0');
717: $safehole->wrap(\&Math::Cephes::y1,$safeeval,'&y1');
718: $safehole->wrap(\&Math::Cephes::yn,$safeeval,'&yn');
719: $safehole->wrap(\&Math::Cephes::yv,$safeeval,'&yv');
720:
721: $safehole->wrap(\&Math::Cephes::bdtr ,$safeeval,'&bdtr' );
722: $safehole->wrap(\&Math::Cephes::bdtrc ,$safeeval,'&bdtrc' );
723: $safehole->wrap(\&Math::Cephes::bdtri ,$safeeval,'&bdtri' );
724: $safehole->wrap(\&Math::Cephes::btdtr ,$safeeval,'&btdtr' );
725: $safehole->wrap(\&Math::Cephes::chdtr ,$safeeval,'&chdtr' );
726: $safehole->wrap(\&Math::Cephes::chdtrc,$safeeval,'&chdtrc');
727: $safehole->wrap(\&Math::Cephes::chdtri,$safeeval,'&chdtri');
728: $safehole->wrap(\&Math::Cephes::fdtr ,$safeeval,'&fdtr' );
729: $safehole->wrap(\&Math::Cephes::fdtrc ,$safeeval,'&fdtrc' );
730: $safehole->wrap(\&Math::Cephes::fdtri ,$safeeval,'&fdtri' );
731: $safehole->wrap(\&Math::Cephes::gdtr ,$safeeval,'&gdtr' );
732: $safehole->wrap(\&Math::Cephes::gdtrc ,$safeeval,'&gdtrc' );
733: $safehole->wrap(\&Math::Cephes::nbdtr ,$safeeval,'&nbdtr' );
734: $safehole->wrap(\&Math::Cephes::nbdtrc,$safeeval,'&nbdtrc');
735: $safehole->wrap(\&Math::Cephes::nbdtri,$safeeval,'&nbdtri');
736: $safehole->wrap(\&Math::Cephes::ndtr ,$safeeval,'&ndtr' );
737: $safehole->wrap(\&Math::Cephes::ndtri ,$safeeval,'&ndtri' );
738: $safehole->wrap(\&Math::Cephes::pdtr ,$safeeval,'&pdtr' );
739: $safehole->wrap(\&Math::Cephes::pdtrc ,$safeeval,'&pdtrc' );
740: $safehole->wrap(\&Math::Cephes::pdtri ,$safeeval,'&pdtri' );
741: $safehole->wrap(\&Math::Cephes::stdtr ,$safeeval,'&stdtr' );
742: $safehole->wrap(\&Math::Cephes::stdtri,$safeeval,'&stdtri');
743:
744: $safehole->wrap(\&Math::Cephes::Matrix::mat,$safeeval,'&mat');
745: $safehole->wrap(\&Math::Cephes::Matrix::new,$safeeval,
746: '&Math::Cephes::Matrix::new');
747: $safehole->wrap(\&Math::Cephes::Matrix::coef,$safeeval,
748: '&Math::Cephes::Matrix::coef');
749: $safehole->wrap(\&Math::Cephes::Matrix::clr,$safeeval,
750: '&Math::Cephes::Matrix::clr');
751: $safehole->wrap(\&Math::Cephes::Matrix::add,$safeeval,
752: '&Math::Cephes::Matrix::add');
753: $safehole->wrap(\&Math::Cephes::Matrix::sub,$safeeval,
754: '&Math::Cephes::Matrix::sub');
755: $safehole->wrap(\&Math::Cephes::Matrix::mul,$safeeval,
756: '&Math::Cephes::Matrix::mul');
757: $safehole->wrap(\&Math::Cephes::Matrix::div,$safeeval,
758: '&Math::Cephes::Matrix::div');
759: $safehole->wrap(\&Math::Cephes::Matrix::inv,$safeeval,
760: '&Math::Cephes::Matrix::inv');
761: $safehole->wrap(\&Math::Cephes::Matrix::transp,$safeeval,
762: '&Math::Cephes::Matrix::transp');
763: $safehole->wrap(\&Math::Cephes::Matrix::simq,$safeeval,
764: '&Math::Cephes::Matrix::simq');
765: $safehole->wrap(\&Math::Cephes::Matrix::mat_to_vec,$safeeval,
766: '&Math::Cephes::Matrix::mat_to_vec');
767: $safehole->wrap(\&Math::Cephes::Matrix::vec_to_mat,$safeeval,
768: '&Math::Cephes::Matrix::vec_to_mat');
769: $safehole->wrap(\&Math::Cephes::Matrix::check,$safeeval,
770: '&Math::Cephes::Matrix::check');
771: $safehole->wrap(\&Math::Cephes::Matrix::check,$safeeval,
772: '&Math::Cephes::Matrix::check');
773:
774: # $safehole->wrap(\&Math::Cephes::new_fract,$safeeval,'&new_fract');
775: # $safehole->wrap(\&Math::Cephes::radd,$safeeval,'&radd');
776: # $safehole->wrap(\&Math::Cephes::rsub,$safeeval,'&rsub');
777: # $safehole->wrap(\&Math::Cephes::rmul,$safeeval,'&rmul');
778: # $safehole->wrap(\&Math::Cephes::rdiv,$safeeval,'&rdiv');
779: # $safehole->wrap(\&Math::Cephes::euclid,$safeeval,'&euclid');
780:
781: $safehole->wrap(\&Math::Random::random_beta,$safeeval,'&math_random_beta');
782: $safehole->wrap(\&Math::Random::random_chi_square,$safeeval,'&math_random_chi_square');
783: $safehole->wrap(\&Math::Random::random_exponential,$safeeval,'&math_random_exponential');
784: $safehole->wrap(\&Math::Random::random_f,$safeeval,'&math_random_f');
785: $safehole->wrap(\&Math::Random::random_gamma,$safeeval,'&math_random_gamma');
786: $safehole->wrap(\&Math::Random::random_multivariate_normal,$safeeval,'&math_random_multivariate_normal');
787: $safehole->wrap(\&Math::Random::random_multinomial,$safeeval,'&math_random_multinomial');
788: $safehole->wrap(\&Math::Random::random_noncentral_chi_square,$safeeval,'&math_random_noncentral_chi_square');
789: $safehole->wrap(\&Math::Random::random_noncentral_f,$safeeval,'&math_random_noncentral_f');
790: $safehole->wrap(\&Math::Random::random_normal,$safeeval,'&math_random_normal');
791: $safehole->wrap(\&Math::Random::random_permutation,$safeeval,'&math_random_permutation');
792: $safehole->wrap(\&Math::Random::random_permuted_index,$safeeval,'&math_random_permuted_index');
793: $safehole->wrap(\&Math::Random::random_uniform,$safeeval,'&math_random_uniform');
794: $safehole->wrap(\&Math::Random::random_poisson,$safeeval,'&math_random_poisson');
795: $safehole->wrap(\&Math::Random::random_uniform_integer,$safeeval,'&math_random_uniform_integer');
796: $safehole->wrap(\&Math::Random::random_negative_binomial,$safeeval,'&math_random_negative_binomial');
797: $safehole->wrap(\&Math::Random::random_binomial,$safeeval,'&math_random_binomial');
798: $safehole->wrap(\&Math::Random::random_seed_from_phrase,$safeeval,'&random_seed_from_phrase');
799: $safehole->wrap(\&Math::Random::random_set_seed_from_phrase,$safeeval,'&random_set_seed_from_phrase');
800: $safehole->wrap(\&Math::Random::random_get_seed,$safeeval,'&random_get_seed');
801: $safehole->wrap(\&Math::Random::random_set_seed,$safeeval,'&random_set_seed');
802: $safehole->wrap(\&Apache::lonxml::error,$safeeval,'&LONCAPA_INTERNAL_ERROR');
803: $safehole->wrap(\&Apache::lonxml::debug,$safeeval,'&LONCAPA_INTERNAL_DEBUG');
804: $safehole->wrap(\&Apache::lonnet::logthis,$safeeval,'&LONCAPA_INTERNAL_LOGTHIS');
805: $safehole->wrap(\&Apache::inputtags::finalizeawards,$safeeval,'&LONCAPA_INTERNAL_FINALIZEAWARDS');
806: $safehole->wrap(\&Apache::caparesponse::get_sigrange,$safeeval,'&LONCAPA_INTERNAL_get_sigrange');
807: # use Data::Dumper;
808: # $safehole->wrap(\&Data::Dumper::Dumper,$safeeval,'&LONCAPA_INTERNAL_Dumper');
809: #need to inspect this class of ops
810: # $safeeval->deny(":base_orig");
811: $safeeval->permit("require");
812: $safeinit .= ';$external::target="'.$target.'";';
813: &Apache::run::run($safeinit,$safeeval);
814: &initialize_rndseed($safeeval);
815: }
816:
817: sub clean_safespace {
818: my ($safeeval) = @_;
819: delete_package_recurse($safeeval->{Root});
820: }
821:
822: sub delete_package_recurse {
823: my ($package) = @_;
824: my @subp;
825: {
826: no strict 'refs';
827: while (my ($key,$val) = each(%{*{"$package\::"}})) {
828: if (!defined($val)) { next; }
829: local (*ENTRY) = $val;
830: if (defined *ENTRY{HASH} && $key =~ /::$/ &&
831: $key ne "main::" && $key ne "<none>::")
832: {
833: my ($p) = $package ne "main" ? "$package\::" : "";
834: ($p .= $key) =~ s/::$//;
835: push(@subp,$p);
836: }
837: }
838: }
839: foreach my $p (@subp) {
840: delete_package_recurse($p);
841: }
842: Symbol::delete_package($package);
843: }
844:
845: sub initialize_rndseed {
846: my ($safeeval)=@_;
847: my $rndseed;
848: my ($symb,$courseid,$domain,$name) = &Apache::lonnet::whichuser();
849: $rndseed=&Apache::lonnet::rndseed($symb,$courseid,$domain,$name);
850: my $safeinit = '$external::randomseed="'.$rndseed.'";';
851: &Apache::lonxml::debug("Setting rndseed to $rndseed");
852: &Apache::run::run($safeinit,$safeeval);
853: }
854:
855: sub default_homework_load {
856: my ($safeeval)=@_;
857: &Apache::lonxml::debug('Loading default_homework');
858: my $default=&Apache::lonnet::getfile('/home/httpd/html/res/adm/includes/default_homework.lcpm');
859: if ($default eq -1) {
860: &Apache::lonxml::error("<b>Unable to find <i>default_homework.lcpm</i></b>");
861: } else {
862: &Apache::run::run($default,$safeeval);
863: $Apache::lonxml::default_homework_loaded=1;
864: }
865: }
866:
867: {
868: my $alarm_depth;
869: sub init_alarm {
870: alarm(0);
871: $alarm_depth=0;
872: }
873:
874: sub start_alarm {
875: if ($alarm_depth<1) {
876: my $old=alarm($Apache::lonnet::perlvar{'lonScriptTimeout'});
877: if ($old) {
878: &Apache::lonxml::error("Cancelled an alarm of $old, this shouldn't occur.");
879: }
880: }
881: $alarm_depth++;
882: }
883:
884: sub end_alarm {
885: $alarm_depth--;
886: if ($alarm_depth<1) { alarm(0); }
887: }
888: }
889: my $metamode_was;
890: sub startredirection {
891: if (!$Apache::lonxml::redirection) {
892: $metamode_was=$Apache::lonxml::metamode;
893: }
894: $Apache::lonxml::metamode=0;
895: $Apache::lonxml::redirection++;
896: push (@Apache::lonxml::outputstack, '');
897: }
898:
899: sub endredirection {
900: if (!$Apache::lonxml::redirection) {
901: &Apache::lonxml::error("Endredirection was called before a startredirection, perhaps you have unbalanced tags. Some debugging information:".join ":",caller);
902: return '';
903: }
904: $Apache::lonxml::redirection--;
905: if (!$Apache::lonxml::redirection) {
906: $Apache::lonxml::metamode=$metamode_was;
907: }
908: pop @Apache::lonxml::outputstack;
909: }
910:
911: sub end_tag {
912: my ($tagstack,$parstack,$token)=@_;
913: pop(@$tagstack);
914: pop(@$parstack);
915: &decreasedepth($token);
916: }
917:
918: sub initdepth {
919: @Apache::lonxml::depthcounter=();
920: undef($Apache::lonxml::last_depth_count);
921: }
922:
923:
924: my @timers;
925: my $lasttime;
926: # @Apache::lonxml::depthcounter -> count of tags that exist so
927: # far at each level
928: # $Apache::lonxml::last_depth_count -> when ascending, need to
929: # remember the count for the level below the current level (for
930: # example going from 1_2 -> 1 -> 1_3 need to remember the 2 )
931:
932: sub increasedepth {
933: my ($token) = @_;
934: push(@Apache::lonxml::depthcounter,$Apache::lonxml::last_depth_count+1);
935: undef($Apache::lonxml::last_depth_count);
936: my $time;
937: if ($Apache::lonxml::debug eq "1") {
938: push(@timers,[&gettimeofday()]);
939: $time=&tv_interval($lasttime);
940: $lasttime=[&gettimeofday()];
941: }
942: my $spacing=' 'x($#Apache::lonxml::depthcounter);
943: $Apache::lonxml::curdepth=join('_',@Apache::lonxml::depthcounter);
944: # &Apache::lonxml::debug("s$spacing$Apache::lonxml::depth : $Apache::lonxml::olddepth : $Apache::lonxml::curdepth : $token->[1] : $time");
945: #print "<br />s $Apache::lonxml::depth : $Apache::lonxml::olddepth : $curdepth : $token->[1]\n";
946: }
947:
948: sub decreasedepth {
949: my ($token) = @_;
950: if ( $#Apache::lonxml::depthcounter == -1) {
951: &Apache::lonxml::warning(&mt("Missing tags, unable to properly run file."));
952: }
953: $Apache::lonxml::last_depth_count = pop(@Apache::lonxml::depthcounter);
954:
955: my ($timer,$time);
956: if ($Apache::lonxml::debug eq "1") {
957: $timer=pop(@timers);
958: $time=&tv_interval($lasttime);
959: $lasttime=[&gettimeofday()];
960: }
961: my $spacing=' 'x($#Apache::lonxml::depthcounter);
962: $Apache::lonxml::curdepth = join('_',@Apache::lonxml::depthcounter);
963: # &Apache::lonxml::debug("e$spacing$Apache::lonxml::depth : $Apache::lonxml::olddepth : $Apache::lonxml::curdepth : $token->[1] : $time : ".&tv_interval($timer));
964: #print "<br />e $Apache::lonxml::depth : $Apache::lonxml::olddepth : $token->[1] : $curdepth\n";
965: }
966:
967: sub get_id {
968: my ($parstack,$safeeval)=@_;
969: my $id= &Apache::lonxml::get_param('id',$parstack,$safeeval);
970: if ($env{'request.state'} eq 'construct' && $id =~ /(\.|_)/) {
971: &error(&mt("IDs are not allowed to contain "<tt>_</tt>" or "<tt>.</tt>""));
972: }
973: if ($id =~ /^\s*$/) { $id = $Apache::lonxml::curdepth; }
974: return $id;
975: }
976:
977: sub get_all_text_unbalanced {
978: #there is a copy of this in lonpublisher.pm
979: my($tag,$pars)= @_;
980: my $token;
981: my $result='';
982: $tag='<'.$tag.'>';
983: while ($token = $$pars[-1]->get_token) {
984: if (($token->[0] eq 'T')||($token->[0] eq 'C')||($token->[0] eq 'D')) {
985: if ($token->[0] eq 'T' && $token->[2]) {
986: $result.='<![CDATA['.$token->[1].']]>';
987: } else {
988: $result.=$token->[1];
989: }
990: } elsif ($token->[0] eq 'PI') {
991: $result.=$token->[2];
992: } elsif ($token->[0] eq 'S') {
993: $result.=$token->[4];
994: } elsif ($token->[0] eq 'E') {
995: $result.=$token->[2];
996: }
997: if ($result =~ /\Q$tag\E/is) {
998: ($result,my $redo)=$result =~ /(.*)\Q$tag\E(.*)/is;
999: #&Apache::lonxml::debug('Got a winner with leftovers ::'.$2);
1000: #&Apache::lonxml::debug('Result is :'.$1);
1001: $redo=$tag.$redo;
1002: &Apache::lonxml::newparser($pars,\$redo);
1003: last;
1004: }
1005: }
1006: return $result
1007: }
1008:
1009: =pod
1010:
1011: For bubble grading mode and exam bubble printing mode, the tracking of
1012: the current 'bubble line number' is stored in the %env element
1013: 'form.counter', and is modifed and handled by the following routines.
1014:
1015: The value of it is stored in $Apache:lonxml::counter when live and
1016: stored back to env after done.
1017:
1018: =item &increment_counter($increment);
1019:
1020: Increments the internal counter environment variable a specified amount
1021:
1022: Optional Arguments:
1023: $increment - amount to increment by (defaults to 1)
1024:
1025: =cut
1026:
1027: sub increment_counter {
1028: my ($increment) = @_;
1029: if (defined($increment) && $increment gt 0) {
1030: $Apache::lonxml::counter+=$increment;
1031: } else {
1032: $Apache::lonxml::counter++;
1033: }
1034: $Apache::lonxml::counter_changed=1;
1035: }
1036:
1037: =pod
1038:
1039: =item &init_counter($increment);
1040:
1041: Initialize the internal counter environment variable
1042:
1043: =cut
1044:
1045: sub init_counter {
1046: if ($env{'request.state'} eq 'construct') {
1047: $Apache::lonxml::counter=1;
1048: $Apache::lonxml::counter_changed=1;
1049: } elsif (defined($env{'form.counter'})) {
1050: $Apache::lonxml::counter=$env{'form.counter'};
1051: $Apache::lonxml::counter_changed=0;
1052: } else {
1053: $Apache::lonxml::counter=1;
1054: $Apache::lonxml::counter_changed=1;
1055: }
1056: }
1057:
1058: sub store_counter {
1059: &Apache::lonnet::appenv(('form.counter' => $Apache::lonxml::counter));
1060: $Apache::lonxml::counter_changed=0;
1061: return '';
1062: }
1063:
1064: {
1065: my $state;
1066: sub clear_problem_counter {
1067: undef($state);
1068: &Apache::lonnet::delenv('form.counter');
1069: &Apache::lonxml::init_counter();
1070: &Apache::lonxml::store_counter();
1071: }
1072:
1073: sub remember_problem_counter {
1074: &Apache::lonnet::transfer_profile_to_env(undef,undef,1);
1075: $state = $env{'form.counter'};
1076: }
1077:
1078: sub restore_problem_counter {
1079: if (defined($state)) {
1080: &Apache::lonnet::appenv(('form.counter' => $state));
1081: }
1082: }
1083: sub get_problem_counter {
1084: if ($Apache::lonxml::counter_changed) { &store_counter() }
1085: &Apache::lonnet::transfer_profile_to_env(undef,undef,1);
1086: return $env{'form.counter'};
1087: }
1088: }
1089:
1090: sub get_all_text {
1091: my($tag,$pars,$style)= @_;
1092: my $gotfullstack=1;
1093: if (ref($pars) ne 'ARRAY') {
1094: $gotfullstack=0;
1095: $pars=[$pars];
1096: }
1097: if (ref($style) ne 'HASH') {
1098: $style={};
1099: }
1100: my $depth=0;
1101: my $token;
1102: my $result='';
1103: if ( $tag =~ m:^/: ) {
1104: my $tag=substr($tag,1);
1105: #&Apache::lonxml::debug("have:$tag:");
1106: my $top_empty=0;
1107: while (($depth >=0) && ($#$pars > -1) && (!$top_empty)) {
1108: while (($depth >=0) && ($token = $$pars[-1]->get_token)) {
1109: #&Apache::lonxml::debug("e token:$token->[0]:$depth:$token->[1]:".$#$pars.":".$#Apache::lonxml::pwd);
1110: if (($token->[0] eq 'T')||($token->[0] eq 'C')||($token->[0] eq 'D')) {
1111: if ($token->[2]) {
1112: $result.='<![CDATA['.$token->[1].']]>';
1113: } else {
1114: $result.=$token->[1];
1115: }
1116: } elsif ($token->[0] eq 'PI') {
1117: $result.=$token->[2];
1118: } elsif ($token->[0] eq 'S') {
1119: if ($token->[1] =~ /^\Q$tag\E$/i) { $depth++; }
1120: if ($token->[1] =~ /^LONCAPA_INTERNAL_TURN_STYLE_ON$/) { $Apache::lonxml::usestyle=1; }
1121: if ($token->[1] =~ /^LONCAPA_INTERNAL_TURN_STYLE_OFF$/) { $Apache::lonxml::usestyle=0; }
1122: $result.=$token->[4];
1123: } elsif ($token->[0] eq 'E') {
1124: if ( $token->[1] =~ /^\Q$tag\E$/i) { $depth--; }
1125: #skip sending back the last end tag
1126: if ($depth == 0 && exists($$style{'/'.$token->[1]}) && $Apache::lonxml::usestyle) {
1127: my $string=
1128: '<LONCAPA_INTERNAL_TURN_STYLE_OFF end="yes" />'.
1129: $$style{'/'.$token->[1]}.
1130: $token->[2].
1131: '<LONCAPA_INTERNAL_TURN_STYLE_ON />';
1132: &Apache::lonxml::newparser($pars,\$string);
1133: #&Apache::lonxml::debug("reParsing $string");
1134: next;
1135: }
1136: if ($depth > -1) {
1137: $result.=$token->[2];
1138: } else {
1139: $$pars[-1]->unget_token($token);
1140: }
1141: }
1142: }
1143: if (($depth >=0) && ($#$pars == 0) ) { $top_empty=1; }
1144: if (($depth >=0) && ($#$pars > 0) ) {
1145: pop(@$pars);
1146: pop(@Apache::lonxml::pwd);
1147: }
1148: }
1149: if ($top_empty && $depth >= 0) {
1150: #never found the end tag ran out of text, throw error send back blank
1151: &error('Never found end tag for <'.$tag.
1152: '> current string <pre>'.
1153: &HTML::Entities::encode($result,'<>&"').
1154: '</pre>');
1155: if ($gotfullstack) {
1156: my $newstring='</'.$tag.'>'.$result;
1157: &Apache::lonxml::newparser($pars,\$newstring);
1158: }
1159: $result='';
1160: }
1161: } else {
1162: while ($#$pars > -1) {
1163: while ($token = $$pars[-1]->get_token) {
1164: #&Apache::lonxml::debug("s token:$token->[0]:$depth:$token->[1]");
1165: if (($token->[0] eq 'T')||($token->[0] eq 'C')||
1166: ($token->[0] eq 'D')) {
1167: if ($token->[2]) {
1168: $result.='<![CDATA['.$token->[1].']]>';
1169: } else {
1170: $result.=$token->[1];
1171: }
1172: } elsif ($token->[0] eq 'PI') {
1173: $result.=$token->[2];
1174: } elsif ($token->[0] eq 'S') {
1175: if ( $token->[1] =~ /^\Q$tag\E$/i) {
1176: $$pars[-1]->unget_token($token); last;
1177: } else {
1178: $result.=$token->[4];
1179: }
1180: if ($token->[1] =~ /^LONCAPA_INTERNAL_TURN_STYLE_ON$/) { $Apache::lonxml::usestyle=1; }
1181: if ($token->[1] =~ /^LONCAPA_INTERNAL_TURN_STYLE_OFF$/) { $Apache::lonxml::usestyle=0; }
1182: } elsif ($token->[0] eq 'E') {
1183: $result.=$token->[2];
1184: }
1185: }
1186: if (($#$pars > 0) ) {
1187: pop(@$pars);
1188: pop(@Apache::lonxml::pwd);
1189: } else { last; }
1190: }
1191: }
1192: #&Apache::lonxml::debug("Exit:$result:");
1193: return $result
1194: }
1195:
1196: sub newparser {
1197: my ($parser,$contentref,$dir) = @_;
1198: push (@$parser,HTML::LCParser->new($contentref));
1199: $$parser[-1]->xml_mode(1);
1200: $$parser[-1]->marked_sections(1);
1201: if ( $dir eq '' ) {
1202: push (@Apache::lonxml::pwd, $Apache::lonxml::pwd[$#Apache::lonxml::pwd]);
1203: } else {
1204: push (@Apache::lonxml::pwd, $dir);
1205: }
1206: }
1207:
1208: sub parstring {
1209: my ($token) = @_;
1210: my (@vars,@values);
1211: foreach my $attr (@{$token->[3]}) {
1212: if ($attr!~/\W/) {
1213: my $val=$token->[2]->{$attr};
1214: $val =~ s/([\%\@\\\"\'])/\\$1/g;
1215: $val =~ s/(\$[^\{a-zA-Z_])/\\$1/g;
1216: $val =~ s/(\$)$/\\$1/;
1217: #if ($val =~ m/^[\%\@]/) { $val="\\".$val; }
1218: push(@vars,"\$$attr");
1219: push(@values,"\"$val\"");
1220: }
1221: }
1222: my $var_init =
1223: (@vars) ? 'my ('.join(',',@vars).') = ('.join(',',@values).');'
1224: : '';
1225: return $var_init;
1226: }
1227:
1228: sub extlink {
1229: my ($res,$exact)=@_;
1230: if (!$exact) {
1231: $res=&Apache::lonnet::hreflocation($Apache::lonxml::pwd[-1],$res);
1232: }
1233: push(@Apache::lonxml::extlinks,$res)
1234: }
1235:
1236: sub writeallows {
1237: unless ($#extlinks>=0) { return; }
1238: my $thisurl = &Apache::lonnet::clutter(shift);
1239: if ($env{'httpref.'.$thisurl}) {
1240: $thisurl=$env{'httpref.'.$thisurl};
1241: }
1242: my $thisdir=$thisurl;
1243: $thisdir=~s/\/[^\/]+$//;
1244: my %httpref=();
1245: foreach (@extlinks) {
1246: $httpref{'httpref.'.
1247: &Apache::lonnet::hreflocation($thisdir,&unescape($_))}=$thisurl;
1248: }
1249: @extlinks=();
1250: &Apache::lonnet::appenv(%httpref);
1251: }
1252:
1253: sub register_ssi {
1254: my ($url,%form)=@_;
1255: push (@Apache::lonxml::ssi_info,{'url'=>$url,'form'=>\%form});
1256: return '';
1257: }
1258:
1259: sub do_registered_ssi {
1260: foreach my $info (@Apache::lonxml::ssi_info) {
1261: my %form=%{ $info->{'form'}};
1262: my $url=$info->{'url'};
1263: &Apache::lonnet::ssi($url,%form);
1264: }
1265: }
1266:
1267: sub add_script_result {
1268: my ($display) = @_;
1269: push(@script_var_displays, $display);
1270: }
1271:
1272: #
1273: # Afterburner handles anchors, highlights and links
1274: #
1275: sub afterburn {
1276: my $result=shift;
1277: &Apache::loncommon::get_unprocessed_cgi($ENV{'QUERY_STRING'},
1278: ['highlight','anchor','link']);
1279: if ($env{'form.highlight'}) {
1280: foreach (split(/\,/,$env{'form.highlight'})) {
1281: my $anchorname=$_;
1282: my $matchthis=$anchorname;
1283: $matchthis=~s/\_+/\\s\+/g;
1284: $result=~s/(\Q$matchthis\E)/\<font color=\"red\"\>$1\<\/font\>/gs;
1285: }
1286: }
1287: if ($env{'form.link'}) {
1288: foreach (split(/\,/,$env{'form.link'})) {
1289: my ($anchorname,$linkurl)=split(/\>/,$_);
1290: my $matchthis=$anchorname;
1291: $matchthis=~s/\_+/\\s\+/g;
1292: $result=~s/(\Q$matchthis\E)/\<a href=\"$linkurl\"\>$1\<\/a\>/gs;
1293: }
1294: }
1295: if ($env{'form.anchor'}) {
1296: my $anchorname=$env{'form.anchor'};
1297: my $matchthis=$anchorname;
1298: $matchthis=~s/\_+/\\s\+/g;
1299: $result=~s/(\Q$matchthis\E)/\<a name=\"$anchorname\"\>$1\<\/a\>/s;
1300: $result.=(<<"ENDSCRIPT");
1301: <script type="text/javascript">
1302: document.location.hash='$anchorname';
1303: </script>
1304: ENDSCRIPT
1305: }
1306: return $result;
1307: }
1308:
1309: sub storefile {
1310: my ($file,$contents)=@_;
1311: &Apache::lonnet::correct_line_ends(\$contents);
1312: if (my $fh=Apache::File->new('>'.$file)) {
1313: print $fh $contents;
1314: $fh->close();
1315: return 1;
1316: } else {
1317: &warning("Unable to save file $file");
1318: return 0;
1319: }
1320: }
1321:
1322: sub createnewhtml {
1323: my $title=&mt('Title of document goes here');
1324: my $body=&mt('Body of document goes here');
1325: my $filecontents=(<<SIMPLECONTENT);
1326: <html>
1327: <head>
1328: <title>$title</title>
1329: </head>
1330: <body bgcolor="#FFFFFF">
1331: $body
1332: </body>
1333: </html>
1334: SIMPLECONTENT
1335: return $filecontents;
1336: }
1337:
1338: sub createnewsty {
1339: my $filecontents=(<<SIMPLECONTENT);
1340: <definetag name="">
1341: <render>
1342: <web></web>
1343: <tex></tex>
1344: </render>
1345: </definetag>
1346: SIMPLECONTENT
1347: return $filecontents;
1348: }
1349:
1350:
1351: sub inserteditinfo {
1352: my ($result,$filecontents,$filetype)=@_;
1353: $filecontents = &HTML::Entities::encode($filecontents,'<>&"');
1354: # my $editheader='<a href="#editsection">Edit below</a><hr />';
1355: my $xml_help = '';
1356: my $initialize='';
1357: if ($filetype eq 'html') {
1358: my $addbuttons=&Apache::lonhtmlcommon::htmlareaaddbuttons();
1359: $initialize=&Apache::lonhtmlcommon::spellheader();
1360: if (!&Apache::lonhtmlcommon::htmlareablocked() &&
1361: &Apache::lonhtmlcommon::htmlareabrowser()) {
1362: $initialize.=(<<FULLPAGE);
1363: <script type="text/javascript">
1364: $addbuttons
1365:
1366: HTMLArea.loadPlugin("FullPage");
1367:
1368: function initDocument() {
1369: var editor=new HTMLArea("filecont",config);
1370: editor.registerPlugin(FullPage);
1371: editor.generate();
1372: }
1373: </script>
1374: FULLPAGE
1375: } else {
1376: $initialize.=(<<FULLPAGE);
1377: <script type="text/javascript">
1378: $addbuttons
1379: function initDocument() {
1380: }
1381: </script>
1382: FULLPAGE
1383: }
1384: $result=~s/\<body([^\>]*)\>/\<body onload="initDocument()" $1\>/i;
1385: $xml_help=&Apache::loncommon::helpLatexCheatsheet();
1386: }
1387: my $cleanbut = '';
1388:
1389: my $titledisplay=&display_title();
1390: my %lt=&Apache::lonlocal::texthash('st' => 'Save and Edit',
1391: 'vi' => 'Save and View',
1392: 'dv' => 'Discard Edits and View',
1393: 'un' => 'undo',
1394: 'ed' => 'Edit');
1395: my $buttons=(<<BUTTONS);
1396: $cleanbut
1397: <input type="submit" name="discardview" accesskey="d" value="$lt{'dv'}" />
1398: <input type="submit" name="Undo" accesskey="u" value="$lt{'un'}" /><hr>
1399: <input type="submit" name="savethisfile" accesskey="s" value="$lt{'st'}" />
1400: <input type="submit" name="viewmode" accesskey="v" value="$lt{'vi'}" />
1401: BUTTONS
1402: $buttons.=&Apache::lonhtmlcommon::spelllink('xmledit','filecont');
1403: my $editfooter=(<<ENDFOOTER);
1404: $initialize
1405: <hr />
1406: <a name="editsection" />
1407: <form method="post" name="xmledit">
1408: $xml_help
1409: <input type="hidden" name="editmode" value="$lt{'ed'}" />
1410: $buttons<br />
1411: <textarea style="width:100%" cols="80" rows="44" name="filecont" id="filecont">$filecontents</textarea>
1412: <br />$buttons
1413: <br />
1414: </form>
1415: $titledisplay
1416: </body>
1417: ENDFOOTER
1418: # $result=~s/(\<body[^\>]*\>)/$1$editheader/is;
1419: $result=~s/(\<\/body\>)/$editfooter/is;
1420: return $result;
1421: }
1422:
1423: sub get_target {
1424: my $viewgrades=&Apache::lonnet::allowed('vgr',$env{'request.course.id'});
1425: if ( $env{'request.state'} eq 'published') {
1426: if ( defined($env{'form.grade_target'})
1427: && ($viewgrades == 'F' )) {
1428: return ($env{'form.grade_target'});
1429: } elsif (defined($env{'form.grade_target'})) {
1430: if (($env{'form.grade_target'} eq 'web') ||
1431: ($env{'form.grade_target'} eq 'tex') ) {
1432: return $env{'form.grade_target'}
1433: } else {
1434: return 'web';
1435: }
1436: } else {
1437: return 'web';
1438: }
1439: } elsif ($env{'request.state'} eq 'construct') {
1440: if ( defined($env{'form.grade_target'})) {
1441: return ($env{'form.grade_target'});
1442: } else {
1443: return 'web';
1444: }
1445: } else {
1446: return 'web';
1447: }
1448: }
1449:
1450: sub handler {
1451: my $request=shift;
1452:
1453: my $target=&get_target();
1454:
1455: $Apache::lonxml::debug=$env{'user.debug'};
1456:
1457: &Apache::loncommon::content_type($request,'text/html');
1458: &Apache::loncommon::no_cache($request);
1459: if ($env{'request.state'} eq 'published') {
1460: $request->set_last_modified(&Apache::lonnet::metadata($request->uri,
1461: 'lastrevisiondate'));
1462: }
1463: $request->send_http_header;
1464:
1465: return OK if $request->header_only;
1466:
1467:
1468: my $file=&Apache::lonnet::filelocation("",$request->uri);
1469: my $filetype;
1470: if ($file =~ /\.sty$/) {
1471: $filetype='sty';
1472: } else {
1473: $filetype='html';
1474: }
1475: #
1476: # Edit action? Save file.
1477: #
1478: if (!($env{'request.state'} eq 'published')) {
1479: if ($env{'form.savethisfile'} || $env{'form.viewmode'} || $env{'form.Undo'}) {
1480: my $html_file=&Apache::lonnet::getfile($file);
1481: my $error = &Apache::lonhomework::handle_save_or_undo($request, \$html_file, \$env{'form.filecont'});
1482: }
1483: }
1484: my %mystyle;
1485: my $result = '';
1486: my $filecontents=&Apache::lonnet::getfile($file);
1487: if ($filecontents eq -1) {
1488: my $start_page=&Apache::loncommon::start_page('File Error');
1489: my $end_page=&Apache::loncommon::end_page();
1490: my $fnf=&mt('File not found');
1491: $result=(<<ENDNOTFOUND);
1492: $start_page
1493: <b>$fnf: $file</b>
1494: $end_page
1495: ENDNOTFOUND
1496: $filecontents='';
1497: if ($env{'request.state'} ne 'published') {
1498: if ($filetype eq 'sty') {
1499: $filecontents=&createnewsty();
1500: } else {
1501: $filecontents=&createnewhtml();
1502: }
1503: $env{'form.editmode'}='Edit'; #force edit mode
1504: }
1505: } else {
1506: unless ($env{'request.state'} eq 'published') {
1507: if ($filecontents=~/BEGIN LON-CAPA Internal/) {
1508: &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.'));
1509: }
1510: #
1511: # we are in construction space, see if edit mode forced
1512: &Apache::loncommon::get_unprocessed_cgi($ENV{'QUERY_STRING'},
1513: ['editmode']);
1514: }
1515: if (!$env{'form.editmode'} || $env{'form.viewmode'} || $env{'form.discardview'}) {
1516: $result = &Apache::lonxml::xmlparse($request,$target,$filecontents,
1517: '',%mystyle);
1518: undef($Apache::lonhomework::parsing_a_task);
1519: &Apache::loncommon::get_unprocessed_cgi($ENV{'QUERY_STRING'},
1520: ['rawmode']);
1521: if ($env{'form.rawmode'}) { $result = $filecontents; }
1522: }
1523: }
1524:
1525: #
1526: # Edit action? Insert editing commands
1527: #
1528: unless ($env{'request.state'} eq 'published') {
1529: if ($env{'form.editmode'} && (!($env{'form.viewmode'})) && (!($env{'form.discardview'})))
1530: {
1531: my $displayfile=$request->uri;
1532: $displayfile=~s/^\/[^\/]*//;
1533: my %options = ();
1534: if ($env{'environment.remote'} ne 'off') {
1535: $options{'bgcolor'} = '#FFFFFF';
1536: }
1537: my $start_page = &Apache::loncommon::start_page(undef,undef,
1538: \%options);
1539: $result=$start_page.
1540: &Apache::lonxml::message_location().'<h3>'.
1541: $displayfile.
1542: '</h3>'.&Apache::loncommon::end_page();
1543: $result=&inserteditinfo($result,$filecontents,$filetype);
1544: }
1545: }
1546: if ($filetype eq 'html') { &writeallows($request->uri); }
1547:
1548:
1549: &Apache::lonxml::add_messages(\$result);
1550: $request->print($result);
1551:
1552: return OK;
1553: }
1554:
1555: sub display_title {
1556: my $result;
1557: if ($env{'request.state'} eq 'construct') {
1558: my $title=&Apache::lonnet::gettitle();
1559: if (!defined($title) || $title eq '') {
1560: $title = $env{'request.filename'};
1561: $title = substr($title, rindex($title, '/') + 1);
1562: }
1563: $result = "<script type='text/javascript'>top.document.title = '$title - LON-CAPA Construction Space';</script>";
1564: }
1565: return $result;
1566: }
1567:
1568: sub debug {
1569: if ($Apache::lonxml::debug eq "1") {
1570: $|=1;
1571: my $request=$Apache::lonxml::request;
1572: if (!$request) {
1573: eval { $request=Apache->request; };
1574: }
1575: if (!$request) {
1576: eval { $request=Apache2::RequestUtil->request; };
1577: }
1578: $request->print('<font size="-2"><pre>DEBUG:'.&HTML::Entities::encode($_[0],'<>&"')."</pre></font>\n");
1579: #&Apache::lonnet::logthis($_[0]);
1580: }
1581: }
1582:
1583: sub show_error_warn_msg {
1584: if ($env{'request.filename'} eq '/home/httpd/html/res/lib/templates/simpleproblem.problem' &&
1585: &Apache::lonnet::allowed('mdc',$env{'request.course.id'})) {
1586: return 1;
1587: }
1588: return (($Apache::lonxml::debug eq 1) ||
1589: ($env{'request.state'} eq 'construct') ||
1590: ($Apache::lonhomework::browse eq 'F'
1591: &&
1592: $env{'form.show_errors'} eq 'on'));
1593: }
1594:
1595: sub error {
1596: $errorcount++;
1597: if ( &show_error_warn_msg() ) {
1598: # If printing in construction space, put the error inside <pre></pre>
1599: push(@Apache::lonxml::error_messages,
1600: $Apache::lonxml::warnings_error_header.
1601: "<b>ERROR:</b>".join("<br />\n",@_)."<br />\n");
1602: $Apache::lonxml::warnings_error_header='';
1603: } else {
1604: my $errormsg;
1605: my ($symb)=&Apache::lonnet::symbread();
1606: if ( !$symb ) {
1607: #public or browsers
1608: $errormsg=&mt("An error occured while processing this resource. The author has been notified.");
1609: }
1610: my $host=$Apache::lonnet::perlvar{'lonHostID'};
1611: my $msg = join('<br />',(@_,"The error occurred on host <tt>$host</tt>"));
1612: #notify author
1613: &Apache::lonmsg::author_res_msg($env{'request.filename'},$msg);
1614: #notify course
1615: if ( $symb && $env{'request.course.id'} ) {
1616: my $cnum=$env{'course.'.$env{'request.course.id'}.'.num'};
1617: my $cdom=$env{'course.'.$env{'request.course.id'}.'.domain'};
1618: my (undef,%users)=&Apache::lonmsg::decide_receiver(undef,0,1,1,1);
1619: my $declutter=&Apache::lonnet::declutter($env{'request.filename'});
1620: my $baseurl = &Apache::lonnet::clutter($declutter);
1621: my @userlist;
1622: foreach (keys %users) {
1623: my ($user,$domain) = split(/:/, $_);
1624: push(@userlist,"$user\@$domain");
1625: my $key=$declutter.'_'.$user.'_'.$domain;
1626: my %lastnotified=&Apache::lonnet::get('nohist_xmlerrornotifications',
1627: [$key],
1628: $cdom,$cnum);
1629: my $now=time;
1630: if ($now-$lastnotified{$key}>86400) {
1631: my $title = &Apache::lonnet::gettitle($symb);
1632: my $sentmessage;
1633: &Apache::lonmsg::user_normal_msg($user,$domain,
1634: "Error [$title]",$msg,'',$baseurl,'','',
1635: \$sentmessage,$symb,$title,1);
1636: &Apache::lonnet::put('nohist_xmlerrornotifications',
1637: {$key => $now},
1638: $cdom,$cnum);
1639: }
1640: }
1641: if ($env{'request.role.adv'}) {
1642: $errormsg=&mt("An error occured while processing this resource. The course personnel ([_1]) and the author have been notified.",join(', ',@userlist));
1643: } else {
1644: $errormsg=&mt("An error occured while processing this resource. The instructor has been notified.");
1645: }
1646: }
1647: push(@Apache::lonxml::error_messages,"<b>$errormsg</b> <br />");
1648: }
1649: }
1650:
1651: sub warning {
1652: $warningcount++;
1653:
1654: if ($env{'form.grade_target'} ne 'tex') {
1655: if ( &show_error_warn_msg() ) {
1656: push(@Apache::lonxml::warning_messages,
1657: $Apache::lonxml::warnings_error_header.
1658: "<b>W</b>ARNING<b>:</b>".join('<br />',@_)."<br />\n");
1659: $Apache::lonxml::warnings_error_header='';
1660: }
1661: }
1662: }
1663:
1664: sub info {
1665: if ($env{'form.grade_target'} ne 'tex'
1666: && $env{'request.state'} eq 'construct') {
1667: push(@Apache::lonxml::info_messages,join('<br />',@_)."<br />\n");
1668: }
1669: }
1670:
1671: sub message_location {
1672: return '__LONCAPA_INTERNAL_MESSAGE_LOCATION__';
1673: }
1674:
1675: sub add_messages {
1676: my ($msg)=@_;
1677: my $result=join(' ',
1678: @Apache::lonxml::info_messages,
1679: @Apache::lonxml::error_messages,
1680: @Apache::lonxml::warning_messages);
1681: undef(@Apache::lonxml::info_messages);
1682: undef(@Apache::lonxml::error_messages);
1683: undef(@Apache::lonxml::warning_messages);
1684: $$msg=~s/__LONCAPA_INTERNAL_MESSAGE_LOCATION__/$result/;
1685: $$msg=~s/__LONCAPA_INTERNAL_MESSAGE_LOCATION__//g;
1686: }
1687:
1688: sub get_param {
1689: my ($param,$parstack,$safeeval,$context,$case_insensitive) = @_;
1690: if ( ! $context ) { $context = -1; }
1691: my $args ='';
1692: if ( $#$parstack > (-2-$context) ) { $args=$$parstack[$context]; }
1693: if ( ! $Apache::lonxml::usestyle ) {
1694: $args=$Apache::lonxml::style_values.$args;
1695: }
1696: if ( ! $args ) { return undef; }
1697: if ( $case_insensitive ) {
1698: if ($args =~ s/(my (?:.*))(\$\Q$param\E[,\)])/$1.lc($2)/ei) {
1699: return &Apache::run::run("{$args;".'return $'.$param.'}',
1700: $safeeval); #'
1701: } else {
1702: return undef;
1703: }
1704: } else {
1705: if ( $args =~ /my .*\$\Q$param\E[,\)]/ ) {
1706: return &Apache::run::run("{$args;".'return $'.$param.'}',
1707: $safeeval); #'
1708: } else {
1709: return undef;
1710: }
1711: }
1712: }
1713:
1714: sub get_param_var {
1715: my ($param,$parstack,$safeeval,$context,$case_insensitive) = @_;
1716: if ( ! $context ) { $context = -1; }
1717: my $args ='';
1718: if ( $#$parstack > (-2-$context) ) { $args=$$parstack[$context]; }
1719: if ( ! $Apache::lonxml::usestyle ) {
1720: $args=$Apache::lonxml::style_values.$args;
1721: }
1722: &Apache::lonxml::debug("Args are $args param is $param");
1723: if ($case_insensitive) {
1724: if (! ($args=~s/(my (?:.*))(\$\Q$param\E[,\)])/$1.lc($2)/ei)) {
1725: return undef;
1726: }
1727: } elsif ( $args !~ /my .*\$\Q$param\E[,\)]/ ) { return undef; }
1728: my $value=&Apache::run::run("{$args;".'return $'.$param.'}',$safeeval); #'
1729: &Apache::lonxml::debug("first run is $value");
1730: if ($value =~ /^[\$\@\%][a-zA-Z_]\w*$/) {
1731: &Apache::lonxml::debug("doing second");
1732: my @result=&Apache::run::run("return $value",$safeeval,1);
1733: if (!defined($result[0])) {
1734: return $value
1735: } else {
1736: if (wantarray) { return @result; } else { return $result[0]; }
1737: }
1738: } else {
1739: return $value;
1740: }
1741: }
1742:
1743: sub register_insert_xml {
1744: my $parser = HTML::LCParser->new($Apache::lonnet::perlvar{'lonTabDir'}
1745: .'/insertlist.xml');
1746: my ($tagnum,$in_help)=(0,0);
1747: my @alltags;
1748: my $tag;
1749: while (my $token = $parser->get_token()) {
1750: if ($token->[0] eq 'S') {
1751: my $key;
1752: if ($token->[1] eq 'tag') {
1753: $tag = $token->[2]{'name'};
1754: $insertlist{"$tagnum.tag"} = $tag;
1755: $insertlist{"$tag.num"} = $tagnum;
1756: push(@alltags,$tag);
1757: } elsif ($in_help && $token->[1] eq 'file') {
1758: $key = $tag.'.helpfile';
1759: } elsif ($in_help && $token->[1] eq 'description') {
1760: $key = $tag.'.helpdesc';
1761: } elsif ($token->[1] eq 'description' ||
1762: $token->[1] eq 'color' ||
1763: $token->[1] eq 'show' ) {
1764: $key = $tag.'.'.$token->[1];
1765: } elsif ($token->[1] eq 'insert_sub') {
1766: $key = $tag.'.function';
1767: } elsif ($token->[1] eq 'help') {
1768: $in_help=1;
1769: } elsif ($token->[1] eq 'allow') {
1770: $key = $tag.'.allow';
1771: }
1772: if (defined($key)) {
1773: $insertlist{$key} = $parser->get_text();
1774: $insertlist{$key} =~ s/(^\s*|\s*$ )//gx;
1775: }
1776: } elsif ($token->[0] eq 'E') {
1777: if ($token->[1] eq 'tag') {
1778: undef($tag);
1779: $tagnum++;
1780: } elsif ($token->[1] eq 'help') {
1781: undef($in_help);
1782: }
1783: }
1784: }
1785:
1786: # parse the allows and ignore tags set to <show>no</show>
1787: foreach my $tag (@alltags) {
1788: next if (!exists($insertlist{"$tag.allow"}));
1789: my $allow = $insertlist{"$tag.allow"};
1790: foreach my $element (split(',',$allow)) {
1791: $element =~ s/(^\s*|\s*$ )//gx;
1792: if (!exists($insertlist{"$element.show"})
1793: || $insertlist{"$element.show"} ne 'no') {
1794: push(@{ $insertlist{$tag.'.which'} },$element);
1795: }
1796: }
1797: }
1798: }
1799:
1800: sub register_insert {
1801: return ®ister_insert_xml(@_);
1802: # &dump_insertlist('2');
1803: }
1804:
1805: sub dump_insertlist {
1806: my ($ext) = @_;
1807: open(XML,">/tmp/insertlist.xml.$ext");
1808: print XML ("<insertlist>");
1809: my $i=0;
1810:
1811: while (exists($insertlist{"$i.tag"})) {
1812: my $tag = $insertlist{"$i.tag"};
1813: print XML ("
1814: \t<tag name=\"$tag\">");
1815: if (defined($insertlist{"$tag.description"})) {
1816: print XML ("
1817: \t\t<description>".$insertlist{"$tag.description"}."</description>");
1818: }
1819: if (defined($insertlist{"$tag.color"})) {
1820: print XML ("
1821: \t\t<color>".$insertlist{"$tag.color"}."</color>");
1822: }
1823: if (defined($insertlist{"$tag.function"})) {
1824: print XML ("
1825: \t\t<insert_sub>".$insertlist{"$tag.function"}."</insert_sub>");
1826: }
1827: if (defined($insertlist{"$tag.show"})
1828: && $insertlist{"$tag.show"} ne 'yes') {
1829: print XML ("
1830: \t\t<show>".$insertlist{"$tag.show"}."</show>");
1831: }
1832: if (defined($insertlist{"$tag.helpfile"})) {
1833: print XML ("
1834: \t\t<help>
1835: \t\t\t<file>".$insertlist{"$tag.helpfile"}."</file>");
1836: if ($insertlist{"$tag.helpdesc"} ne '') {
1837: print XML ("
1838: \t\t\t<description>".$insertlist{"$tag.helpdesc"}."</description>");
1839: }
1840: print XML ("
1841: \t\t</help>");
1842: }
1843: if (defined($insertlist{"$tag.which"})) {
1844: print XML ("
1845: \t\t<allow>".join(',',sort(@{ $insertlist{"$tag.which"} }))."</allow>");
1846: }
1847: print XML ("
1848: \t</tag>");
1849: $i++;
1850: }
1851: print XML ("\n</insertlist>\n");
1852: close(XML);
1853: }
1854:
1855: sub description {
1856: my ($token)=@_;
1857: my $tag = &get_tag($token);
1858: return $insertlist{$tag.'.description'};
1859: }
1860:
1861: # Returns a list containing the help file, and the description
1862: sub helpinfo {
1863: my ($token)=@_;
1864: my $tag = &get_tag($token);
1865: return ($insertlist{$tag.'.helpfile'}, $insertlist{$tag.'.helpdesc'});
1866: }
1867:
1868: sub get_tag {
1869: my ($token)=@_;
1870: my $tagnum;
1871: my $tag=$token->[1];
1872: foreach my $namespace (reverse(@Apache::lonxml::namespace)) {
1873: my $testtag = $namespace.'::'.$tag;
1874: $tagnum = $insertlist{"$testtag.num"};
1875: last if (defined($tagnum));
1876: }
1877: if (!defined($tagnum)) {
1878: $tagnum = $Apache::lonxml::insertlist{"$tag.num"};
1879: }
1880: return $insertlist{"$tagnum.tag"};
1881: }
1882:
1883: 1;
1884: __END__
1885:
1886:
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