1: # The LearningOnline Network with CAPA
2: # XML Parser Module
3: #
4: # $Id: lonxml.pm,v 1.526 2011/12/06 16:30:19 dseaton Exp $
5: #
6: # Copyright Michigan State University Board of Trustees
7: #
8: # This file is part of the LearningOnline Network with CAPA (LON-CAPA).
9: #
10: # LON-CAPA is free software; you can redistribute it and/or modify
11: # it under the terms of the GNU General Public License as published by
12: # the Free Software Foundation; either version 2 of the License, or
13: # (at your option) any later version.
14: #
15: # LON-CAPA is distributed in the hope that it will be useful,
16: # but WITHOUT ANY WARRANTY; without even the implied warranty of
17: # MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
18: # GNU General Public License for more details.
19: #
20: # You should have received a copy of the GNU General Public License
21: # along with LON-CAPA; if not, write to the Free Software
22: # Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA 02111-1307 USA
23: #
24: # /home/httpd/html/adm/gpl.txt
25: #
26: # http://www.lon-capa.org/
27: #
28: # Copyright for TtHfunc and TtMfunc by Ian Hutchinson.
29: # TtHfunc and TtMfunc (the "Code") may be compiled and linked into
30: # binary executable programs or libraries distributed by the
31: # Michigan State University (the "Licensee"), but any binaries so
32: # distributed are hereby licensed only for use in the context
33: # of a program or computational system for which the Licensee is the
34: # primary author or distributor, and which performs substantial
35: # additional tasks beyond the translation of (La)TeX into HTML.
36: # The C source of the Code may not be distributed by the Licensee
37: # to any other parties under any circumstances.
38: #
39:
40: =pod
41:
42: =head1 NAME
43:
44: Apache::lonxml
45:
46: =head1 SYNOPSIS
47:
48: XML Parsing Module
49:
50: This is part of the LearningOnline Network with CAPA project
51: described at http://www.lon-capa.org.
52:
53:
54: =head1 SUBROUTINES
55:
56: =cut
57:
58:
59:
60: package Apache::lonxml;
61: use vars
62: qw(@pwd @outputstack $redirection $import @extlinks $metamode $evaluate %insertlist @namespace $errorcount $warningcount);
63: use strict;
64: use LONCAPA;
65: use HTML::LCParser();
66: use HTML::TreeBuilder();
67: use HTML::Entities();
68: use Safe();
69: use Safe::Hole();
70: use Math::Cephes();
71: use Math::Random();
72: use Opcode();
73: use POSIX qw(strftime);
74: use Time::HiRes qw( gettimeofday tv_interval );
75: use Symbol();
76:
77: sub register {
78: my ($space,@taglist) = @_;
79: foreach my $temptag (@taglist) {
80: push(@{ $Apache::lonxml::alltags{$temptag} },$space);
81: }
82: }
83:
84: sub deregister {
85: my ($space,@taglist) = @_;
86: foreach my $temptag (@taglist) {
87: my $tempspace = $Apache::lonxml::alltags{$temptag}[-1];
88: if ($tempspace eq $space) {
89: pop(@{ $Apache::lonxml::alltags{$temptag} });
90: }
91: }
92: #&printalltags();
93: }
94:
95: use Apache::Constants qw(:common);
96: use Apache::lontexconvert();
97: use Apache::style();
98: use Apache::run();
99: use Apache::londefdef();
100: use Apache::scripttag();
101: use Apache::languagetags();
102: use Apache::edit();
103: use Apache::inputtags();
104: use Apache::outputtags();
105: use Apache::lonnet;
106: use Apache::File();
107: use Apache::loncommon();
108: use Apache::lonfeedback();
109: use Apache::lonmsg();
110: use Apache::loncacc();
111: use Apache::lonmaxima();
112: use Apache::lonr();
113: use Apache::lonlocal;
114: use Apache::lonhtmlcommon();
115: use Apache::functionplotresponse();
116:
117: #==================================== Main subroutine: xmlparse
118:
119: #debugging control, to turn on debugging modify the correct handler
120:
121: $Apache::lonxml::debug=0;
122:
123: # keeps count of the number of warnings and errors generated in a parse
124: $warningcount=0;
125: $errorcount=0;
126:
127: #path to the directory containing the file currently being processed
128: @pwd=();
129:
130: #these two are used for capturing a subset of the output for later processing,
131: #don't touch them directly use &startredirection and &endredirection
132: @outputstack = ();
133: $redirection = 0;
134:
135: #controls wheter the <import> tag actually does
136: $import = 1;
137: @extlinks=();
138:
139: # meta mode is a bit weird only some output is to be turned off
140: #<output> tag turns metamode off (defined in londefdef.pm)
141: $metamode = 0;
142:
143: # turns on and of run::evaluate actually derefencing var refs
144: $evaluate = 1;
145:
146: # data structure for eidt mode, determines what tags can go into what other tags
147: %insertlist=();
148:
149: # stores the list of active tag namespaces
150: @namespace=();
151:
152: # stores all Scrit Vars displays for later showing
153: my @script_var_displays=();
154:
155: # a pointer the the Apache request object
156: $Apache::lonxml::request='';
157:
158: # a problem number counter, and check on ether it is used
159: $Apache::lonxml::counter=1;
160: $Apache::lonxml::counter_changed=0;
161:
162: # Part counter hash. In analysis mode, the
163: # problems can use this to record which parts increment the counter
164: # by how much. The counter subs will maintain this hash via
165: # their optional part parameters. Note that the assumption is that
166: # analysis is done in one request and therefore it is not necessary to
167: # save this information request-to-request.
168:
169:
170: %Apache::lonxml::counters_per_part = ();
171:
172: #internal check on whether to look at style defs
173: $Apache::lonxml::usestyle=1;
174:
175: #locations used to store the parameter string for style substitutions
176: $Apache::lonxml::style_values='';
177: $Apache::lonxml::style_end_values='';
178:
179: #array of ssi calls that need to occur after we are done parsing
180: @Apache::lonxml::ssi_info=();
181:
182: #should we do the postag variable interpolation
183: $Apache::lonxml::post_evaluate=1;
184:
185: #a header message to emit in the case of any generated warning or errors
186: $Apache::lonxml::warnings_error_header='';
187:
188: # Control whether or not LaTeX symbols should be substituted for their
189: # \ style equivalents...this may be turned off e.g. in an verbatim
190: # environment.
191:
192: $Apache::lonxml::substitute_LaTeX_symbols = 1; # Starts out on.
193:
194: sub enable_LaTeX_substitutions {
195: $Apache::lonxml::substitute_LaTeX_symbols = 1;
196: }
197: sub disable_LaTeX_substitutions {
198: $Apache::lonxml::substitute_LaTeX_symbols = 0;
199: }
200:
201: sub xmlend {
202: my ($target,$parser)=@_;
203: my $mode='xml';
204: my $status='OPEN';
205: if ($Apache::lonhomework::parsing_a_problem ||
206: $Apache::lonhomework::parsing_a_task ) {
207: $mode='problem';
208: $status=$Apache::inputtags::status[-1];
209: }
210: my $discussion;
211: &Apache::loncommon::get_unprocessed_cgi($ENV{'QUERY_STRING'},
212: ['LONCAPA_INTERNAL_no_discussion']);
213: if (! exists($env{'form.LONCAPA_INTERNAL_no_discussion'}) ||
214: $env{'form.LONCAPA_INTERNAL_no_discussion'} ne 'true') {
215: $discussion=&Apache::lonfeedback::list_discussion($mode,$status);
216: }
217: if ($target eq 'tex') {
218: $discussion.='<tex>\keephidden{ENDOFPROBLEM}\vskip 0.5mm\noindent\makebox[\textwidth/$number_of_columns][b]{\hrulefill}\end{document}</tex>';
219: &Apache::lonxml::newparser($parser,\$discussion,'');
220: return '';
221: }
222:
223: return $discussion;
224: }
225:
226: sub printalltags {
227: my $temp;
228: foreach $temp (sort keys %Apache::lonxml::alltags) {
229: &Apache::lonxml::debug("$temp -- ".
230: join(',',@{ $Apache::lonxml::alltags{$temp} }));
231: }
232: }
233:
234: sub xmlparse {
235: my ($request,$target,$content_file_string,$safeinit,%style_for_target) = @_;
236:
237: &setup_globals($request,$target);
238: &Apache::inputtags::initialize_inputtags();
239: &Apache::bridgetask::initialize_bridgetask();
240: &Apache::outputtags::initialize_outputtags();
241: &Apache::edit::initialize_edit();
242: &Apache::londefdef::initialize_londefdef();
243:
244: #
245: # do we have a course style file?
246: #
247:
248: if ($env{'request.course.id'} && $env{'request.state'} ne 'construct') {
249: my $bodytext=
250: $env{'course.'.$env{'request.course.id'}.'.default_xml_style'};
251: if ($bodytext) {
252: foreach my $file (split(',',$bodytext)) {
253: my $location=&Apache::lonnet::filelocation('',$file);
254: my $styletext=&Apache::lonnet::getfile($location);
255: if ($styletext ne '-1') {
256: %style_for_target = (%style_for_target,
257: &Apache::style::styleparser($target,$styletext));
258: }
259: }
260: }
261: } elsif ($env{'construct.style'}
262: && ($env{'request.state'} eq 'construct')) {
263: my $location=&Apache::lonnet::filelocation('',$env{'construct.style'});
264: my $styletext=&Apache::lonnet::getfile($location);
265: if ($styletext ne '-1') {
266: %style_for_target = (%style_for_target,
267: &Apache::style::styleparser($target,$styletext));
268: }
269: }
270: #&printalltags();
271: my @pars = ();
272: my $pwd=$env{'request.filename'};
273: $pwd =~ s:/[^/]*$::;
274: &newparser(\@pars,\$content_file_string,$pwd);
275:
276: my $safeeval = new Safe;
277: my $safehole = new Safe::Hole;
278: &init_safespace($target,$safeeval,$safehole,$safeinit);
279: #-------------------- Redefinition of the target in the case of compound target
280:
281: ($target, my @tenta) = split('&&',$target);
282:
283: my @stack = ();
284: my @parstack = ();
285: &initdepth();
286: &init_alarm();
287: my $finaloutput = &inner_xmlparse($target,\@stack,\@parstack,\@pars,
288: $safeeval,\%style_for_target,1);
289:
290: if (@stack) {
291: &warning(&mt('At end of file some tags were still left unclosed:').
292: ' <tt><'.join('></tt>, <tt><',reverse(@stack)).
293: '></tt>');
294: }
295: if ($env{'request.uri'}) {
296: &writeallows($env{'request.uri'});
297: }
298: &do_registered_ssi();
299: if ($Apache::lonxml::counter_changed) { &store_counter() }
300:
301: &clean_safespace($safeeval);
302:
303: if (@script_var_displays) {
304: $finaloutput .= join('',@script_var_displays);
305: undef(@script_var_displays);
306: }
307: &init_state();
308: if ($env{'form.return_only_error_and_warning_counts'}) {
309: if ($env{'request.filename'}=~/\.(html|htm|xml)$/i) {
310: my $error=&verify_html($content_file_string);
311: if ($error) { $errorcount++; }
312: }
313: return "$errorcount:$warningcount";
314: }
315: return $finaloutput;
316: }
317:
318: sub latex_special_symbols {
319: my ($string,$where)=@_;
320: #
321: # If e.g. in verbatim mode, then don't substitute.
322: # but return original string.
323: #
324: if (!($Apache::lonxml::substitute_LaTeX_symbols)) {
325: return $string;
326: }
327: if ($where eq 'header') {
328: $string =~ s/\\/\$\\backslash\$/g; # \ -> $\backslash$ per LaTex line by line pg 10.
329: $string =~ s/(\$|%|\{|\})/\\$1/g;
330: $string=&Apache::lonprintout::character_chart($string);
331: # any & or # leftover should be safe to just escape
332: $string=~s/([^\\])\&/$1\\\&/g;
333: $string=~s/([^\\])\#/$1\\\#/g;
334: $string =~ s/_/\\_/g; # _ -> \_
335: $string =~ s/\^/\\\^{}/g; # ^ -> \^{}
336: } else {
337: $string=~s/\\/\\ensuremath{\\backslash}/g;
338: $string=~s/\\\%|\%/\\\%/g;
339: $string=~s/\\{|{/\\{/g;
340: $string=~s/\\}|}/\\}/g;
341: $string=~s/\\ensuremath\\{\\backslash\\}/\\ensuremath{\\backslash}/g;
342: $string=~s/\\\$|\$/\\\$/g;
343: $string=~s/\\\_|\_/\\\_/g;
344: $string=~s/([^\\]|^)(\~|\^)/$1\\$2\\strut /g;
345: $string=~s/(>|<)/\\ensuremath\{$1\}/g; #more or less
346: $string=&Apache::lonprintout::character_chart($string);
347: # any & or # leftover should be safe to just escape
348: $string=~s/\\\&|\&/\\\&/g;
349: $string=~s/\\\#|\#/\\\#/g;
350: $string=~s/\|/\$\\mid\$/g;
351: #single { or } How to escape?
352: }
353: return $string;
354: }
355:
356: sub inner_xmlparse {
357: my ($target,$stack,$parstack,$pars,$safeeval,$style_for_target,$start)=@_;
358: my $finaloutput = '';
359: my $result;
360: my $token;
361: my $dontpop=0;
362: my $startredirection = $Apache::lonxml::redirection;
363: while ( $#$pars > -1 ) {
364: while ($token = $$pars['-1']->get_token) {
365: if (($token->[0] eq 'T') || ($token->[0] eq 'C') ) {
366: if ($metamode<1) {
367: my $text=$token->[1];
368: if ($token->[0] eq 'C' && $target eq 'tex') {
369: $text = '';
370: # $text = '%'.$text."\n";
371: }
372: $result.=$text;
373: }
374: } elsif (($token->[0] eq 'D')) {
375: if ($metamode<1 && $target eq 'web') {
376: my $text=$token->[1];
377: $result.=$text;
378: }
379: } elsif ($token->[0] eq 'PI') {
380: if ($metamode<1 && $target eq 'web') {
381: $result=$token->[2];
382: }
383: } elsif ($token->[0] eq 'S') {
384: # add tag to stack
385: push (@$stack,$token->[1]);
386: # add parameters list to another stack
387: push (@$parstack,&parstring($token));
388: &increasedepth($token);
389: if ($Apache::lonxml::usestyle &&
390: exists($$style_for_target{$token->[1]})) {
391: $Apache::lonxml::usestyle=0;
392: my $string=$$style_for_target{$token->[1]}.
393: '<LONCAPA_INTERNAL_TURN_STYLE_ON />';
394: &Apache::lonxml::newparser($pars,\$string);
395: $Apache::lonxml::style_values=$$parstack[-1];
396: $Apache::lonxml::style_end_values=$$parstack[-1];
397: } else {
398: $result = &callsub("start_$token->[1]", $target, $token, $stack,
399: $parstack, $pars, $safeeval, $style_for_target);
400: }
401: } elsif ($token->[0] eq 'E') {
402: if ($Apache::lonxml::usestyle &&
403: exists($$style_for_target{'/'."$token->[1]"})) {
404: $Apache::lonxml::usestyle=0;
405: my $string=$$style_for_target{'/'.$token->[1]}.
406: '<LONCAPA_INTERNAL_TURN_STYLE_ON end="'.$token->[1].'" />';
407: &Apache::lonxml::newparser($pars,\$string);
408: $Apache::lonxml::style_values=$Apache::lonxml::style_end_values;
409: $Apache::lonxml::style_end_values='';
410: $dontpop=1;
411: } else {
412: #clear out any tags that didn't end
413: while ($token->[1] ne $$stack['-1'] && ($#$stack > -1)) {
414: my $lasttag=$$stack[-1];
415: if ($token->[1] =~ /^\Q$lasttag\E$/i) {
416: &Apache::lonxml::warning(&mt('Using tag [_1] on line [_2] as end tag to [_3]','</'.$token->[1].'>','.$token->[3].','<'.$$stack[-1].'>'));
417: last;
418: } else {
419: &Apache::lonxml::warning(&mt('Found tag [_1] on line [_2] when looking for [_3] in file.','</'.$token->[1].'>',$token->[3],'</'.$$stack[-1].'>'));
420: &end_tag($stack,$parstack,$token);
421: }
422: }
423: $result = &callsub("end_$token->[1]", $target, $token, $stack,
424: $parstack, $pars,$safeeval, $style_for_target);
425: }
426: } else {
427: &Apache::lonxml::error("Unknown token event :$token->[0]:$token->[1]:");
428: }
429: #evaluate variable refs in result
430: if ($Apache::lonxml::post_evaluate &&$result ne "") {
431: my $extras;
432: if (!$Apache::lonxml::usestyle) {
433: $extras=$Apache::lonxml::style_values;
434: }
435: if ( $#$parstack > -1 ) {
436: $result=&Apache::run::evaluate($result,$safeeval,$extras.$$parstack[-1]);
437: } else {
438: $result= &Apache::run::evaluate($result,$safeeval,$extras);
439: }
440: }
441: $Apache::lonxml::post_evaluate=1;
442:
443: if (($token->[0] eq 'T') || ($token->[0] eq 'C') || ($token->[0] eq 'D') ) {
444: #Style file definitions should be correct
445: if ($target eq 'tex' && ($Apache::lonxml::usestyle)) {
446: $result=&latex_special_symbols($result);
447: }
448: }
449:
450: if ($Apache::lonxml::redirection) {
451: $Apache::lonxml::outputstack['-1'] .= $result;
452: } else {
453: $finaloutput.=$result;
454: }
455: $result = '';
456:
457: if ($token->[0] eq 'E' && !$dontpop) {
458: &end_tag($stack,$parstack,$token);
459: }
460: $dontpop=0;
461: }
462: if ($#$pars > -1) {
463: pop @$pars;
464: pop @Apache::lonxml::pwd;
465: }
466: }
467:
468: # if ($target eq 'meta') {
469: # $finaloutput.=&endredirection;
470: # }
471:
472: if ( $start && $target eq 'grade') { &endredirection(); }
473: if ( $Apache::lonxml::redirection > $startredirection) {
474: while ($Apache::lonxml::redirection > $startredirection) {
475: $finaloutput .= &endredirection();
476: }
477: }
478: if (($ENV{'QUERY_STRING'}) && ($target eq 'web')) {
479: $finaloutput=&afterburn($finaloutput);
480: }
481: if ($target eq 'modified') {
482: # if modfied, handle startpart and endpart
483: $finaloutput=~s/\<startpartmarker[^\>]*\>(.*)\<endpartmarker[^\>]*\>/<part>$1<\/part>/gs;
484: }
485: return $finaloutput;
486: }
487:
488: ##
489: ## Looks to see if there is a subroutine defined for this tag. If so, call it,
490: ## otherwise do not call it as we do not know what it is.
491: ##
492: sub callsub {
493: my ($sub,$target,$token,$tagstack,$parstack,$parser,$safeeval,$style)=@_;
494: my $currentstring='';
495: my $nodefault;
496: {
497: my $sub1;
498: no strict 'refs';
499: my $tag=$token->[1];
500: # get utterly rid of extended html tags
501: if ($tag=~/^x\-/i) { return ''; }
502: my $space=$Apache::lonxml::alltags{$tag}[-1];
503: if (!$space) {
504: $tag=~tr/A-Z/a-z/;
505: $sub=~tr/A-Z/a-z/;
506: $space=$Apache::lonxml::alltags{$tag}[-1]
507: }
508:
509: my $deleted=0;
510: if (($token->[0] eq 'S') && ($target eq 'modified')) {
511: $deleted=&Apache::edit::handle_delete($space,$target,$token,$tagstack,
512: $parstack,$parser,$safeeval,
513: $style);
514: }
515: if (!$deleted) {
516: if ($space) {
517: #&Apache::lonxml::debug("Calling sub $sub in $space $metamode");
518: $sub1="$space\:\:$sub";
519: ($currentstring,$nodefault) = &$sub1($target,$token,$tagstack,
520: $parstack,$parser,$safeeval,
521: $style);
522: } else {
523: if ($target eq 'tex') {
524: # throw away tag name
525: return '';
526: }
527: #&Apache::lonxml::debug("NOT Calling sub $sub in $space $metamode");
528: if ($metamode <1) {
529: if (defined($token->[4]) && ($metamode < 1)) {
530: $currentstring = $token->[4];
531: } else {
532: $currentstring = $token->[2];
533: }
534: }
535: }
536: # &Apache::lonxml::debug("nodefalt:$nodefault:");
537: if ($currentstring eq '' && $nodefault eq '') {
538: if ($target eq 'edit') {
539: #&Apache::lonxml::debug("doing default edit for $token->[1]");
540: if ($token->[0] eq 'S') {
541: $currentstring = &Apache::edit::tag_start($target,$token);
542: } elsif ($token->[0] eq 'E') {
543: $currentstring = &Apache::edit::tag_end($target,$token);
544: }
545: }
546: }
547: if ($target eq 'modified' && $nodefault eq '') {
548: if ($currentstring eq '') {
549: if ($token->[0] eq 'S') {
550: $currentstring = $token->[4];
551: } elsif ($token->[0] eq 'E') {
552: $currentstring = $token->[2];
553: } else {
554: $currentstring = $token->[2];
555: }
556: }
557: if ($token->[0] eq 'S') {
558: $currentstring.=&Apache::edit::handle_insert();
559: } elsif ($token->[0] eq 'E') {
560: $currentstring.=&Apache::edit::handle_insertafter($token->[1]);
561: }
562: }
563: }
564: use strict 'refs';
565: }
566: return $currentstring;
567: }
568:
569: {
570: my %state;
571:
572: sub init_state {
573: undef(%state);
574: }
575:
576: sub set_state {
577: my ($key,$value) = @_;
578: $state{$key} = $value;
579: return $value;
580: }
581: sub get_state {
582: my ($key) = @_;
583: return $state{$key};
584: }
585: }
586:
587: sub setup_globals {
588: my ($request,$target)=@_;
589: $Apache::lonxml::request=$request;
590: $errorcount=0;
591: $warningcount=0;
592: $Apache::lonxml::internal_error=0;
593: $Apache::lonxml::default_homework_loaded=0;
594: $Apache::lonxml::usestyle=1;
595: &init_counter();
596: &clear_bubble_lines_for_part();
597: &init_state();
598: &set_state('target',$target);
599: @Apache::lonxml::pwd=();
600: @Apache::lonxml::extlinks=();
601: @script_var_displays=();
602: @Apache::lonxml::ssi_info=();
603: $Apache::lonxml::post_evaluate=1;
604: $Apache::lonxml::warnings_error_header='';
605: $Apache::lonxml::substitute_LaTeX_symbols = 1;
606: if ($target eq 'meta') {
607: $Apache::lonxml::redirection = 0;
608: $Apache::lonxml::metamode = 1;
609: $Apache::lonxml::evaluate = 1;
610: $Apache::lonxml::import = 0;
611: } elsif ($target eq 'answer') {
612: $Apache::lonxml::redirection = 0;
613: $Apache::lonxml::metamode = 1;
614: $Apache::lonxml::evaluate = 1;
615: $Apache::lonxml::import = 1;
616: } elsif ($target eq 'grade') {
617: &startredirection(); #ended in inner_xmlparse on exit
618: $Apache::lonxml::metamode = 0;
619: $Apache::lonxml::evaluate = 1;
620: $Apache::lonxml::import = 1;
621: } elsif ($target eq 'modified') {
622: $Apache::lonxml::redirection = 0;
623: $Apache::lonxml::metamode = 0;
624: $Apache::lonxml::evaluate = 0;
625: $Apache::lonxml::import = 0;
626: } elsif ($target eq 'edit') {
627: $Apache::lonxml::redirection = 0;
628: $Apache::lonxml::metamode = 0;
629: $Apache::lonxml::evaluate = 0;
630: $Apache::lonxml::import = 0;
631: } elsif ($target eq 'analyze') {
632: $Apache::lonxml::redirection = 0;
633: $Apache::lonxml::metamode = 0;
634: $Apache::lonxml::evaluate = 1;
635: $Apache::lonxml::import = 1;
636: } else {
637: $Apache::lonxml::redirection = 0;
638: $Apache::lonxml::metamode = 0;
639: $Apache::lonxml::evaluate = 1;
640: $Apache::lonxml::import = 1;
641: }
642: }
643:
644: sub init_safespace {
645: my ($target,$safeeval,$safehole,$safeinit) = @_;
646: $safeeval->reval('use Math::Complex;');
647: $safeeval->reval('use LaTeX::Table;');
648: $safeeval->deny_only(':dangerous');
649: $safeeval->permit_only(":default");
650: $safeeval->permit("entereval");
651: $safeeval->permit(":base_math");
652: $safeeval->permit("sort");
653: $safeeval->permit("time");
654: $safeeval->permit("caller");
655: $safeeval->deny("rand");
656: $safeeval->deny("srand");
657: $safeeval->deny(":base_io");
658: $safehole->wrap(\&Apache::scripttag::xmlparse,$safeeval,'&xmlparse');
659: $safehole->wrap(\&Apache::outputtags::multipart,$safeeval,'&multipart');
660: $safehole->wrap(\&Apache::lonnet::EXT,$safeeval,'&EXT');
661: $safehole->wrap(\&Apache::chemresponse::chem_standard_order,$safeeval,
662: '&chem_standard_order');
663: $safehole->wrap(\&Apache::response::check_status,$safeeval,'&check_status');
664: $safehole->wrap(\&Apache::response::implicit_multiplication,$safeeval,'&implicit_multiplication');
665:
666: $safehole->wrap(\&Apache::lonmaxima::maxima_eval,$safeeval,'&maxima_eval');
667: $safehole->wrap(\&Apache::lonmaxima::maxima_check,$safeeval,'&maxima_check');
668: $safehole->wrap(\&Apache::lonmaxima::maxima_cas_formula_fix,$safeeval,
669: '&maxima_cas_formula_fix');
670:
671: $safehole->wrap(\&Apache::lonr::r_eval,$safeeval,'&r_eval');
672: $safehole->wrap(\&Apache::lonr::Rentry,$safeeval,'&Rentry');
673: $safehole->wrap(\&Apache::lonr::Rarray,$safeeval,'&Rarray');
674: $safehole->wrap(\&Apache::lonr::r_check,$safeeval,'&r_check');
675: $safehole->wrap(\&Apache::lonr::r_cas_formula_fix,$safeeval,
676: '&r_cas_formula_fix');
677:
678: $safehole->wrap(\&Apache::caparesponse::capa_formula_fix,$safeeval,
679: '&capa_formula_fix');
680:
681: $safehole->wrap(\&Apache::lonlocal::locallocaltime,$safeeval,
682: '&locallocaltime');
683:
684: $safehole->wrap(\&Math::Cephes::asin,$safeeval,'&asin');
685: $safehole->wrap(\&Math::Cephes::acos,$safeeval,'&acos');
686: $safehole->wrap(\&Math::Cephes::atan,$safeeval,'&atan');
687: $safehole->wrap(\&Math::Cephes::sinh,$safeeval,'&sinh');
688: $safehole->wrap(\&Math::Cephes::cosh,$safeeval,'&cosh');
689: $safehole->wrap(\&Math::Cephes::tanh,$safeeval,'&tanh');
690: $safehole->wrap(\&Math::Cephes::asinh,$safeeval,'&asinh');
691: $safehole->wrap(\&Math::Cephes::acosh,$safeeval,'&acosh');
692: $safehole->wrap(\&Math::Cephes::atanh,$safeeval,'&atanh');
693: $safehole->wrap(\&Math::Cephes::erf,$safeeval,'&erf');
694: $safehole->wrap(\&Math::Cephes::erfc,$safeeval,'&erfc');
695: $safehole->wrap(\&Math::Cephes::j0,$safeeval,'&j0');
696: $safehole->wrap(\&Math::Cephes::j1,$safeeval,'&j1');
697: $safehole->wrap(\&Math::Cephes::jn,$safeeval,'&jn');
698: $safehole->wrap(\&Math::Cephes::jv,$safeeval,'&jv');
699: $safehole->wrap(\&Math::Cephes::y0,$safeeval,'&y0');
700: $safehole->wrap(\&Math::Cephes::y1,$safeeval,'&y1');
701: $safehole->wrap(\&Math::Cephes::yn,$safeeval,'&yn');
702: $safehole->wrap(\&Math::Cephes::yv,$safeeval,'&yv');
703:
704: $safehole->wrap(\&Math::Cephes::bdtr ,$safeeval,'&bdtr' );
705: $safehole->wrap(\&Math::Cephes::bdtrc ,$safeeval,'&bdtrc' );
706: $safehole->wrap(\&Math::Cephes::bdtri ,$safeeval,'&bdtri' );
707: $safehole->wrap(\&Math::Cephes::btdtr ,$safeeval,'&btdtr' );
708: $safehole->wrap(\&Math::Cephes::chdtr ,$safeeval,'&chdtr' );
709: $safehole->wrap(\&Math::Cephes::chdtrc,$safeeval,'&chdtrc');
710: $safehole->wrap(\&Math::Cephes::chdtri,$safeeval,'&chdtri');
711: $safehole->wrap(\&Math::Cephes::fdtr ,$safeeval,'&fdtr' );
712: $safehole->wrap(\&Math::Cephes::fdtrc ,$safeeval,'&fdtrc' );
713: $safehole->wrap(\&Math::Cephes::fdtri ,$safeeval,'&fdtri' );
714: $safehole->wrap(\&Math::Cephes::gdtr ,$safeeval,'&gdtr' );
715: $safehole->wrap(\&Math::Cephes::gdtrc ,$safeeval,'&gdtrc' );
716: $safehole->wrap(\&Math::Cephes::nbdtr ,$safeeval,'&nbdtr' );
717: $safehole->wrap(\&Math::Cephes::nbdtrc,$safeeval,'&nbdtrc');
718: $safehole->wrap(\&Math::Cephes::nbdtri,$safeeval,'&nbdtri');
719: $safehole->wrap(\&Math::Cephes::ndtr ,$safeeval,'&ndtr' );
720: $safehole->wrap(\&Math::Cephes::ndtri ,$safeeval,'&ndtri' );
721: $safehole->wrap(\&Math::Cephes::pdtr ,$safeeval,'&pdtr' );
722: $safehole->wrap(\&Math::Cephes::pdtrc ,$safeeval,'&pdtrc' );
723: $safehole->wrap(\&Math::Cephes::pdtri ,$safeeval,'&pdtri' );
724: $safehole->wrap(\&Math::Cephes::stdtr ,$safeeval,'&stdtr' );
725: $safehole->wrap(\&Math::Cephes::stdtri,$safeeval,'&stdtri');
726:
727: $safehole->wrap(\&Math::Cephes::Matrix::mat,$safeeval,'&mat');
728: $safehole->wrap(\&Math::Cephes::Matrix::new,$safeeval,
729: '&Math::Cephes::Matrix::new');
730: $safehole->wrap(\&Math::Cephes::Matrix::coef,$safeeval,
731: '&Math::Cephes::Matrix::coef');
732: $safehole->wrap(\&Math::Cephes::Matrix::clr,$safeeval,
733: '&Math::Cephes::Matrix::clr');
734: $safehole->wrap(\&Math::Cephes::Matrix::add,$safeeval,
735: '&Math::Cephes::Matrix::add');
736: $safehole->wrap(\&Math::Cephes::Matrix::sub,$safeeval,
737: '&Math::Cephes::Matrix::sub');
738: $safehole->wrap(\&Math::Cephes::Matrix::mul,$safeeval,
739: '&Math::Cephes::Matrix::mul');
740: $safehole->wrap(\&Math::Cephes::Matrix::div,$safeeval,
741: '&Math::Cephes::Matrix::div');
742: $safehole->wrap(\&Math::Cephes::Matrix::inv,$safeeval,
743: '&Math::Cephes::Matrix::inv');
744: $safehole->wrap(\&Math::Cephes::Matrix::transp,$safeeval,
745: '&Math::Cephes::Matrix::transp');
746: $safehole->wrap(\&Math::Cephes::Matrix::simq,$safeeval,
747: '&Math::Cephes::Matrix::simq');
748: $safehole->wrap(\&Math::Cephes::Matrix::mat_to_vec,$safeeval,
749: '&Math::Cephes::Matrix::mat_to_vec');
750: $safehole->wrap(\&Math::Cephes::Matrix::vec_to_mat,$safeeval,
751: '&Math::Cephes::Matrix::vec_to_mat');
752: $safehole->wrap(\&Math::Cephes::Matrix::check,$safeeval,
753: '&Math::Cephes::Matrix::check');
754: $safehole->wrap(\&Math::Cephes::Matrix::check,$safeeval,
755: '&Math::Cephes::Matrix::check');
756:
757: # $safehole->wrap(\&Math::Cephes::new_fract,$safeeval,'&new_fract');
758: # $safehole->wrap(\&Math::Cephes::radd,$safeeval,'&radd');
759: # $safehole->wrap(\&Math::Cephes::rsub,$safeeval,'&rsub');
760: # $safehole->wrap(\&Math::Cephes::rmul,$safeeval,'&rmul');
761: # $safehole->wrap(\&Math::Cephes::rdiv,$safeeval,'&rdiv');
762: # $safehole->wrap(\&Math::Cephes::euclid,$safeeval,'&euclid');
763:
764: $safehole->wrap(\&Math::Random::random_beta,$safeeval,'&math_random_beta');
765: $safehole->wrap(\&Math::Random::random_chi_square,$safeeval,'&math_random_chi_square');
766: $safehole->wrap(\&Math::Random::random_exponential,$safeeval,'&math_random_exponential');
767: $safehole->wrap(\&Math::Random::random_f,$safeeval,'&math_random_f');
768: $safehole->wrap(\&Math::Random::random_gamma,$safeeval,'&math_random_gamma');
769: $safehole->wrap(\&Math::Random::random_multivariate_normal,$safeeval,'&math_random_multivariate_normal');
770: $safehole->wrap(\&Math::Random::random_multinomial,$safeeval,'&math_random_multinomial');
771: $safehole->wrap(\&Math::Random::random_noncentral_chi_square,$safeeval,'&math_random_noncentral_chi_square');
772: $safehole->wrap(\&Math::Random::random_noncentral_f,$safeeval,'&math_random_noncentral_f');
773: $safehole->wrap(\&Math::Random::random_normal,$safeeval,'&math_random_normal');
774: $safehole->wrap(\&Math::Random::random_permutation,$safeeval,'&math_random_permutation');
775: $safehole->wrap(\&Math::Random::random_permuted_index,$safeeval,'&math_random_permuted_index');
776: $safehole->wrap(\&Math::Random::random_uniform,$safeeval,'&math_random_uniform');
777: $safehole->wrap(\&Math::Random::random_poisson,$safeeval,'&math_random_poisson');
778: $safehole->wrap(\&Math::Random::random_uniform_integer,$safeeval,'&math_random_uniform_integer');
779: $safehole->wrap(\&Math::Random::random_negative_binomial,$safeeval,'&math_random_negative_binomial');
780: $safehole->wrap(\&Math::Random::random_binomial,$safeeval,'&math_random_binomial');
781: $safehole->wrap(\&Math::Random::random_seed_from_phrase,$safeeval,'&random_seed_from_phrase');
782: $safehole->wrap(\&Math::Random::random_set_seed_from_phrase,$safeeval,'&random_set_seed_from_phrase');
783: $safehole->wrap(\&Math::Random::random_get_seed,$safeeval,'&random_get_seed');
784: $safehole->wrap(\&Math::Random::random_set_seed,$safeeval,'&random_set_seed');
785: $safehole->wrap(\&Apache::loncommon::languages,$safeeval,'&languages');
786: $safehole->wrap(\&Apache::lonxml::error,$safeeval,'&LONCAPA_INTERNAL_ERROR');
787: $safehole->wrap(\&Apache::lonxml::debug,$safeeval,'&LONCAPA_INTERNAL_DEBUG');
788: $safehole->wrap(\&Apache::lonnet::logthis,$safeeval,'&LONCAPA_INTERNAL_LOGTHIS');
789: $safehole->wrap(\&Apache::inputtags::finalizeawards,$safeeval,'&LONCAPA_INTERNAL_FINALIZEAWARDS');
790: $safehole->wrap(\&Apache::caparesponse::get_sigrange,$safeeval,'&LONCAPA_INTERNAL_get_sigrange');
791: $safehole->wrap(\&Apache::functionplotresponse::fpr_val,$safeeval,'&fpr_val');
792: $safehole->wrap(\&Apache::functionplotresponse::fpr_f,$safeeval,'&fpr_f');
793: $safehole->wrap(\&Apache::functionplotresponse::fpr_dfdx,$safeeval,'&fpr_dfdx');
794: $safehole->wrap(\&Apache::functionplotresponse::fpr_d2fdx2,$safeeval,'&fpr_d2fdx2');
795: $safehole->wrap(\&Apache::functionplotresponse::fpr_vectorcoords,$safeeval,'&fpr_vectorcoords');
796: $safehole->wrap(\&Apache::functionplotresponse::fpr_objectcoords,$safeeval,'&fpr_objectcoords');
797: $safehole->wrap(\&Apache::functionplotresponse::fpr_vectorlength,$safeeval,'&fpr_vectorlength');
798: $safehole->wrap(\&Apache::functionplotresponse::fpr_vectorangle,$safeeval,'&fpr_vectorangle');
799:
800: # use Data::Dumper;
801: # $safehole->wrap(\&Data::Dumper::Dumper,$safeeval,'&LONCAPA_INTERNAL_Dumper');
802: #need to inspect this class of ops
803: # $safeeval->deny(":base_orig");
804: $safeeval->permit("require");
805: $safeinit .= ';$external::target="'.$target.'";';
806: &Apache::run::run($safeinit,$safeeval);
807: &initialize_rndseed($safeeval);
808: }
809:
810: sub clean_safespace {
811: my ($safeeval) = @_;
812: delete_package_recurse($safeeval->{Root});
813: }
814:
815: sub delete_package_recurse {
816: my ($package) = @_;
817: my @subp;
818: {
819: no strict 'refs';
820: while (my ($key,$val) = each(%{*{"$package\::"}})) {
821: if (!defined($val)) { next; }
822: local (*ENTRY) = $val;
823: if (defined *ENTRY{HASH} && $key =~ /::$/ &&
824: $key ne "main::" && $key ne "<none>::")
825: {
826: my ($p) = $package ne "main" ? "$package\::" : "";
827: ($p .= $key) =~ s/::$//;
828: push(@subp,$p);
829: }
830: }
831: }
832: foreach my $p (@subp) {
833: delete_package_recurse($p);
834: }
835: Symbol::delete_package($package);
836: }
837:
838: sub initialize_rndseed {
839: my ($safeeval)=@_;
840: my $rndseed;
841: my ($symb,$courseid,$domain,$name) = &Apache::lonnet::whichuser();
842: $rndseed=&Apache::lonnet::rndseed($symb,$courseid,$domain,$name);
843: my $safeinit = '$external::randomseed="'.$rndseed.'";';
844: &Apache::lonxml::debug("Setting rndseed to $rndseed");
845: &Apache::run::run($safeinit,$safeeval);
846: }
847:
848: sub default_homework_load {
849: my ($safeeval)=@_;
850: &Apache::lonxml::debug('Loading default_homework');
851: my $default=&Apache::lonnet::getfile($Apache::lonnet::perlvar{'lonIncludes'}.
852: '/default_homework.lcpm');
853: if ($default eq -1) {
854: &Apache::lonxml::error("<b>Unable to find <i>default_homework.lcpm</i></b>");
855: } else {
856: &Apache::run::run($default,$safeeval);
857: $Apache::lonxml::default_homework_loaded=1;
858: }
859: }
860:
861: {
862: my $alarm_depth;
863: sub init_alarm {
864: alarm(0);
865: $alarm_depth=0;
866: }
867:
868: sub start_alarm {
869: if ($alarm_depth<1) {
870: my $old=alarm($Apache::lonnet::perlvar{'lonScriptTimeout'});
871: if ($old) {
872: &Apache::lonxml::error("Cancelled an alarm of $old, this shouldn't occur.");
873: }
874: }
875: $alarm_depth++;
876: }
877:
878: sub end_alarm {
879: $alarm_depth--;
880: if ($alarm_depth<1) { alarm(0); }
881: }
882: }
883: my $metamode_was;
884: sub startredirection {
885: if (!$Apache::lonxml::redirection) {
886: $metamode_was=$Apache::lonxml::metamode;
887: }
888: $Apache::lonxml::metamode=0;
889: $Apache::lonxml::redirection++;
890: push (@Apache::lonxml::outputstack, '');
891: }
892:
893: sub endredirection {
894: if (!$Apache::lonxml::redirection) {
895: &Apache::lonxml::error("Endredirection was called before a startredirection, perhaps you have unbalanced tags. Some debugging information:".join ":",caller);
896: return '';
897: }
898: $Apache::lonxml::redirection--;
899: if (!$Apache::lonxml::redirection) {
900: $Apache::lonxml::metamode=$metamode_was;
901: }
902: pop @Apache::lonxml::outputstack;
903: }
904: sub in_redirection {
905: return ($Apache::lonxml::redirection > 0)
906: }
907:
908: sub end_tag {
909: my ($tagstack,$parstack,$token)=@_;
910: pop(@$tagstack);
911: pop(@$parstack);
912: &decreasedepth($token);
913: }
914:
915: sub initdepth {
916: @Apache::lonxml::depthcounter=();
917: undef($Apache::lonxml::last_depth_count);
918: }
919:
920:
921: my @timers;
922: my $lasttime;
923: # @Apache::lonxml::depthcounter -> count of tags that exist so
924: # far at each level
925: # $Apache::lonxml::last_depth_count -> when ascending, need to
926: # remember the count for the level below the current level (for
927: # example going from 1_2 -> 1 -> 1_3 need to remember the 2 )
928:
929: sub increasedepth {
930: my ($token) = @_;
931: push(@Apache::lonxml::depthcounter,$Apache::lonxml::last_depth_count+1);
932: undef($Apache::lonxml::last_depth_count);
933: my $time;
934: if ($Apache::lonxml::debug eq "1") {
935: push(@timers,[&gettimeofday()]);
936: $time=&tv_interval($lasttime);
937: $lasttime=[&gettimeofday()];
938: }
939: my $spacing=' 'x($#Apache::lonxml::depthcounter);
940: $Apache::lonxml::curdepth=join('_',@Apache::lonxml::depthcounter);
941: # &Apache::lonxml::debug("s$spacing$Apache::lonxml::depth : $Apache::lonxml::olddepth : $Apache::lonxml::curdepth : $token->[1] : $time");
942: #print "<br />s $Apache::lonxml::depth : $Apache::lonxml::olddepth : $curdepth : $token->[1]\n";
943: }
944:
945: sub decreasedepth {
946: my ($token) = @_;
947: if ( $#Apache::lonxml::depthcounter == -1) {
948: &Apache::lonxml::warning(&mt("Missing tags, unable to properly run file."));
949: }
950: $Apache::lonxml::last_depth_count = pop(@Apache::lonxml::depthcounter);
951:
952: my ($timer,$time);
953: if ($Apache::lonxml::debug eq "1") {
954: $timer=pop(@timers);
955: $time=&tv_interval($lasttime);
956: $lasttime=[&gettimeofday()];
957: }
958: my $spacing=' 'x($#Apache::lonxml::depthcounter);
959: $Apache::lonxml::curdepth = join('_',@Apache::lonxml::depthcounter);
960: # &Apache::lonxml::debug("e$spacing$Apache::lonxml::depth : $Apache::lonxml::olddepth : $Apache::lonxml::curdepth : $token->[1] : $time : ".&tv_interval($timer));
961: #print "<br />e $Apache::lonxml::depth : $Apache::lonxml::olddepth : $token->[1] : $curdepth\n";
962: }
963:
964: sub get_id {
965: my ($parstack,$safeeval)=@_;
966: my $id= &Apache::lonxml::get_param('id',$parstack,$safeeval);
967: if ($env{'request.state'} eq 'construct' && $id =~ /([._]|[^\w\d\s[:punct:]])/) {
968: &error(&mt('ID [_1] contains invalid characters. IDs are only allowed to contain letters, numbers, spaces and -','"<tt>'.$id.'</tt>"'));
969: }
970: if ($id =~ /^\s*$/) { $id = $Apache::lonxml::curdepth; }
971: return $id;
972: }
973:
974: sub get_all_text_unbalanced {
975: #there is a copy of this in lonpublisher.pm
976: my($tag,$pars)= @_;
977: my $token;
978: my $result='';
979: $tag='<'.$tag.'>';
980: while ($token = $$pars[-1]->get_token) {
981: if (($token->[0] eq 'T')||($token->[0] eq 'C')||($token->[0] eq 'D')) {
982: if ($token->[0] eq 'T' && $token->[2]) {
983: $result.='<![CDATA['.$token->[1].']]>';
984: } else {
985: $result.=$token->[1];
986: }
987: } elsif ($token->[0] eq 'PI') {
988: $result.=$token->[2];
989: } elsif ($token->[0] eq 'S') {
990: $result.=$token->[4];
991: } elsif ($token->[0] eq 'E') {
992: $result.=$token->[2];
993: }
994: if ($result =~ /\Q$tag\E/is) {
995: ($result,my $redo)=$result =~ /(.*)\Q$tag\E(.*)/is;
996: #&Apache::lonxml::debug('Got a winner with leftovers ::'.$2);
997: #&Apache::lonxml::debug('Result is :'.$1);
998: $redo=$tag.$redo;
999: &Apache::lonxml::newparser($pars,\$redo);
1000: last;
1001: }
1002: }
1003: return $result
1004:
1005: }
1006:
1007: #########################################################################
1008: # #
1009: # bubble line counter management #
1010: # #
1011: #########################################################################
1012:
1013: =pod
1014:
1015: For bubble grading mode and exam bubble printing mode, the tracking of
1016: the current 'bubble line number' is stored in the %env element
1017: 'form.counter', and is modifed and handled by the following routines.
1018:
1019: The value of it is stored in $Apache:lonxml::counter when live and
1020: stored back to env after done.
1021:
1022: =item &increment_counter($increment, $part_response);
1023:
1024: Increments the internal counter environment variable a specified amount
1025:
1026: Optional Arguments:
1027: $increment - amount to increment by (defaults to 1)
1028: Also 1 if the value is negative or zero.
1029: $part_response - A concatenation of the part and response id
1030: identifying exactly what is being 'answered'.
1031:
1032:
1033: =cut
1034:
1035: sub increment_counter {
1036: my ($increment, $part_response) = @_;
1037: if ($env{'form.grade_noincrement'}) { return; }
1038: if (!defined($increment) || $increment le 0) {
1039: $increment = 1;
1040: }
1041: $Apache::lonxml::counter += $increment;
1042:
1043: # If the caller supplied the response_id parameter,
1044: # Maintain its counter.. creating if necessary.
1045:
1046: if (defined($part_response)) {
1047: if (!defined($Apache::lonxml::counters_per_part{$part_response})) {
1048: $Apache::lonxml::counters_per_part{$part_response} = 0;
1049: }
1050: $Apache::lonxml::counters_per_part{$part_response} += $increment;
1051: my $new_value = $Apache::lonxml::counters_per_part{$part_response};
1052: }
1053:
1054: $Apache::lonxml::counter_changed=1;
1055: }
1056:
1057: =pod
1058:
1059: =item &init_counter($increment);
1060:
1061: Initialize the internal counter environment variable
1062:
1063: =cut
1064:
1065: sub init_counter {
1066: if ($env{'request.state'} eq 'construct') {
1067: $Apache::lonxml::counter=1;
1068: $Apache::lonxml::counter_changed=1;
1069: } elsif (defined($env{'form.counter'})) {
1070: $Apache::lonxml::counter=$env{'form.counter'};
1071: $Apache::lonxml::counter_changed=0;
1072: } else {
1073: $Apache::lonxml::counter=1;
1074: $Apache::lonxml::counter_changed=1;
1075: }
1076: }
1077:
1078: sub store_counter {
1079: &Apache::lonnet::appenv({'form.counter' => $Apache::lonxml::counter});
1080: $Apache::lonxml::counter_changed=0;
1081: return '';
1082: }
1083:
1084: {
1085: my $state;
1086: sub clear_problem_counter {
1087: undef($state);
1088: &Apache::lonnet::delenv('form.counter');
1089: &Apache::lonxml::init_counter();
1090: &Apache::lonxml::store_counter();
1091: }
1092:
1093: sub remember_problem_counter {
1094: &Apache::lonnet::transfer_profile_to_env(undef,undef,1);
1095: $state = $env{'form.counter'};
1096: }
1097:
1098: sub restore_problem_counter {
1099: if (defined($state)) {
1100: &Apache::lonnet::appenv({'form.counter' => $state});
1101: }
1102: }
1103: sub get_problem_counter {
1104: if ($Apache::lonxml::counter_changed) { &store_counter() }
1105: &Apache::lonnet::transfer_profile_to_env(undef,undef,1);
1106: return $env{'form.counter'};
1107: }
1108: }
1109:
1110: =pod
1111:
1112: =item bubble_lines_for_part(part_response)
1113:
1114: Returns the number of lines required to get a response for
1115: $part_response (this is just $Apache::lonxml::counters_per_part{$part_response}
1116:
1117: =cut
1118:
1119: sub bubble_lines_for_part {
1120: my ($part_response) = @_;
1121:
1122: if (!defined($Apache::lonxml::counters_per_part{$part_response})) {
1123: return 0;
1124: } else {
1125: return $Apache::lonxml::counters_per_part{$part_response};
1126: }
1127: }
1128:
1129: =pod
1130:
1131: =item clear_bubble_lines_for_part
1132:
1133: Clears the hash of bubble lines per part. If a caller
1134: needs to analyze several resources this should be called between
1135: resources to reset the hash for each problem being analyzed.
1136:
1137: =cut
1138:
1139: sub clear_bubble_lines_for_part {
1140: undef(%Apache::lonxml::counters_per_part);
1141: }
1142:
1143: =pod
1144:
1145: =item set_bubble_lines(part_response, value)
1146:
1147: If there is a problem part, that for whatever reason
1148: requires bubble lines that are not
1149: the same as the counter increment, it can call this sub during
1150: analysis to set its hash value explicitly.
1151:
1152: =cut
1153:
1154: sub set_bubble_lines {
1155: my ($part_response, $value) = @_;
1156:
1157: $Apache::lonxml::counters_per_part{$part_response} = $value;
1158: }
1159:
1160: =pod
1161:
1162: =item get_bubble_line_hash
1163:
1164: Returns the current bubble line hash. This is assumed to
1165: be small so we return a copy
1166:
1167:
1168: =cut
1169:
1170: sub get_bubble_line_hash {
1171: return %Apache::lonxml::counters_per_part;
1172: }
1173:
1174:
1175: #--------------------------------------------------
1176:
1177: sub get_all_text {
1178: my($tag,$pars,$style)= @_;
1179: my $gotfullstack=1;
1180: if (ref($pars) ne 'ARRAY') {
1181: $gotfullstack=0;
1182: $pars=[$pars];
1183: }
1184: if (ref($style) ne 'HASH') {
1185: $style={};
1186: }
1187: my $depth=0;
1188: my $token;
1189: my $result='';
1190: if ( $tag =~ m:^/: ) {
1191: my $tag=substr($tag,1);
1192: #&Apache::lonxml::debug("have:$tag:");
1193: my $top_empty=0;
1194: while (($depth >=0) && ($#$pars > -1) && (!$top_empty)) {
1195: while (($depth >=0) && ($token = $$pars[-1]->get_token)) {
1196: #&Apache::lonxml::debug("e token:$token->[0]:$depth:$token->[1]:".$#$pars.":".$#Apache::lonxml::pwd);
1197: if (($token->[0] eq 'T')||($token->[0] eq 'C')||($token->[0] eq 'D')) {
1198: if ($token->[2]) {
1199: $result.='<![CDATA['.$token->[1].']]>';
1200: } else {
1201: $result.=$token->[1];
1202: }
1203: } elsif ($token->[0] eq 'PI') {
1204: $result.=$token->[2];
1205: } elsif ($token->[0] eq 'S') {
1206: if ($token->[1] =~ /^\Q$tag\E$/i) { $depth++; }
1207: if ($token->[1] =~ /^LONCAPA_INTERNAL_TURN_STYLE_ON$/) { $Apache::lonxml::usestyle=1; }
1208: if ($token->[1] =~ /^LONCAPA_INTERNAL_TURN_STYLE_OFF$/) { $Apache::lonxml::usestyle=0; }
1209: $result.=$token->[4];
1210: } elsif ($token->[0] eq 'E') {
1211: if ( $token->[1] =~ /^\Q$tag\E$/i) { $depth--; }
1212: #skip sending back the last end tag
1213: if ($depth == 0 && exists($$style{'/'.$token->[1]}) && $Apache::lonxml::usestyle) {
1214: my $string=
1215: '<LONCAPA_INTERNAL_TURN_STYLE_OFF end="yes" />'.
1216: $$style{'/'.$token->[1]}.
1217: $token->[2].
1218: '<LONCAPA_INTERNAL_TURN_STYLE_ON />';
1219: &Apache::lonxml::newparser($pars,\$string);
1220: #&Apache::lonxml::debug("reParsing $string");
1221: next;
1222: }
1223: if ($depth > -1) {
1224: $result.=$token->[2];
1225: } else {
1226: $$pars[-1]->unget_token($token);
1227: }
1228: }
1229: }
1230: if (($depth >=0) && ($#$pars == 0) ) { $top_empty=1; }
1231: if (($depth >=0) && ($#$pars > 0) ) {
1232: pop(@$pars);
1233: pop(@Apache::lonxml::pwd);
1234: }
1235: }
1236: if ($top_empty && $depth >= 0) {
1237: #never found the end tag ran out of text, throw error send back blank
1238: &error('Never found end tag for <'.$tag.
1239: '> current string <pre>'.
1240: &HTML::Entities::encode($result,'<>&"').
1241: '</pre>');
1242: if ($gotfullstack) {
1243: my $newstring='</'.$tag.'>'.$result;
1244: &Apache::lonxml::newparser($pars,\$newstring);
1245: }
1246: $result='';
1247: }
1248: } else {
1249: while ($#$pars > -1) {
1250: while ($token = $$pars[-1]->get_token) {
1251: #&Apache::lonxml::debug("s token:$token->[0]:$depth:$token->[1]");
1252: if (($token->[0] eq 'T')||($token->[0] eq 'C')||
1253: ($token->[0] eq 'D')) {
1254: if ($token->[2]) {
1255: $result.='<![CDATA['.$token->[1].']]>';
1256: } else {
1257: $result.=$token->[1];
1258: }
1259: } elsif ($token->[0] eq 'PI') {
1260: $result.=$token->[2];
1261: } elsif ($token->[0] eq 'S') {
1262: if ( $token->[1] =~ /^\Q$tag\E$/i) {
1263: $$pars[-1]->unget_token($token); last;
1264: } else {
1265: $result.=$token->[4];
1266: }
1267: if ($token->[1] =~ /^LONCAPA_INTERNAL_TURN_STYLE_ON$/) { $Apache::lonxml::usestyle=1; }
1268: if ($token->[1] =~ /^LONCAPA_INTERNAL_TURN_STYLE_OFF$/) { $Apache::lonxml::usestyle=0; }
1269: } elsif ($token->[0] eq 'E') {
1270: $result.=$token->[2];
1271: }
1272: }
1273: if (($#$pars > 0) ) {
1274: pop(@$pars);
1275: pop(@Apache::lonxml::pwd);
1276: } else { last; }
1277: }
1278: }
1279: #&Apache::lonxml::debug("Exit:$result:");
1280: return $result
1281: }
1282:
1283: sub newparser {
1284: my ($parser,$contentref,$dir) = @_;
1285: push (@$parser,HTML::LCParser->new($contentref));
1286: $$parser[-1]->xml_mode(1);
1287: $$parser[-1]->marked_sections(1);
1288: if ( $dir eq '' ) {
1289: push (@Apache::lonxml::pwd, $Apache::lonxml::pwd[$#Apache::lonxml::pwd]);
1290: } else {
1291: push (@Apache::lonxml::pwd, $dir);
1292: }
1293: }
1294:
1295: sub parstring {
1296: my ($token) = @_;
1297: my (@vars,@values);
1298: foreach my $attr (@{$token->[3]}) {
1299: if ($attr!~/\W/) {
1300: my $val=$token->[2]->{$attr};
1301: $val =~ s/([\%\@\\\"\'])/\\$1/g;
1302: $val =~ s/(\$[^\{a-zA-Z_])/\\$1/g;
1303: $val =~ s/(\$)$/\\$1/;
1304: #if ($val =~ m/^[\%\@]/) { $val="\\".$val; }
1305: push(@vars,"\$$attr");
1306: push(@values,"\"$val\"");
1307: }
1308: }
1309: my $var_init =
1310: (@vars) ? 'my ('.join(',',@vars).') = ('.join(',',@values).');'
1311: : '';
1312: return $var_init;
1313: }
1314:
1315: sub extlink {
1316: my ($res,$exact)=@_;
1317: if (!$exact) {
1318: $res=&Apache::lonnet::hreflocation($Apache::lonxml::pwd[-1],$res);
1319: }
1320: push(@Apache::lonxml::extlinks,$res)
1321: }
1322:
1323: sub writeallows {
1324: unless ($#extlinks>=0) { return; }
1325: my $thisurl = &Apache::lonnet::clutter(shift);
1326: if ($env{'httpref.'.$thisurl}) {
1327: $thisurl=$env{'httpref.'.$thisurl};
1328: }
1329: my $thisdir=$thisurl;
1330: $thisdir=~s/\/[^\/]+$//;
1331: my %httpref=();
1332: foreach (@extlinks) {
1333: $httpref{'httpref.'.
1334: &Apache::lonnet::hreflocation($thisdir,&unescape($_))}=$thisurl;
1335: }
1336: @extlinks=();
1337: &Apache::lonnet::appenv(\%httpref);
1338: }
1339:
1340: sub register_ssi {
1341: my ($url,%form)=@_;
1342: push (@Apache::lonxml::ssi_info,{'url'=>$url,'form'=>\%form});
1343: return '';
1344: }
1345:
1346: sub do_registered_ssi {
1347: foreach my $info (@Apache::lonxml::ssi_info) {
1348: my %form=%{ $info->{'form'}};
1349: my $url=$info->{'url'};
1350: &Apache::lonnet::ssi($url,%form);
1351: }
1352: }
1353:
1354: sub add_script_result {
1355: my ($display) = @_;
1356: push(@script_var_displays, $display);
1357: }
1358:
1359: #
1360: # Afterburner handles anchors, highlights and links
1361: #
1362: sub afterburn {
1363: my $result=shift;
1364: &Apache::loncommon::get_unprocessed_cgi($ENV{'QUERY_STRING'},
1365: ['highlight','anchor','link']);
1366: if ($env{'form.highlight'}) {
1367: foreach (split(/\,/,$env{'form.highlight'})) {
1368: my $anchorname=$_;
1369: my $matchthis=$anchorname;
1370: $matchthis=~s/\_+/\\s\+/g;
1371: $result=~s/(\Q$matchthis\E)/\<font color=\"red\"\>$1\<\/font\>/gs;
1372: }
1373: }
1374: if ($env{'form.link'}) {
1375: foreach (split(/\,/,$env{'form.link'})) {
1376: my ($anchorname,$linkurl)=split(/\>/,$_);
1377: my $matchthis=$anchorname;
1378: $matchthis=~s/\_+/\\s\+/g;
1379: $result=~s/(\Q$matchthis\E)/\<a href=\"$linkurl\"\>$1\<\/a\>/gs;
1380: }
1381: }
1382: if ($env{'form.anchor'}) {
1383: my $anchorname=$env{'form.anchor'};
1384: my $matchthis=$anchorname;
1385: $matchthis=~s/\_+/\\s\+/g;
1386: $result=~s/(\Q$matchthis\E)/\<a name=\"$anchorname\"\>$1\<\/a\>/s;
1387: $result.=(<<"ENDSCRIPT");
1388: <script type="text/javascript">
1389: document.location.hash='$anchorname';
1390: </script>
1391: ENDSCRIPT
1392: }
1393: return $result;
1394: }
1395:
1396: sub storefile {
1397: my ($file,$contents)=@_;
1398: &Apache::lonnet::correct_line_ends(\$contents);
1399: if (my $fh=Apache::File->new('>'.$file)) {
1400: print $fh $contents;
1401: $fh->close();
1402: return 1;
1403: } else {
1404: &warning(&mt('Unable to save file [_1]','<tt>'.$file.'</tt>'));
1405: return 0;
1406: }
1407: }
1408:
1409: sub createnewhtml {
1410: my $title=&mt('Title of document goes here');
1411: my $body=&mt('Body of document goes here');
1412: my $filecontents=(<<SIMPLECONTENT);
1413: <html>
1414: <head>
1415: <title>$title</title>
1416: </head>
1417: <body bgcolor="#FFFFFF">
1418: $body
1419: </body>
1420: </html>
1421: SIMPLECONTENT
1422: return $filecontents;
1423: }
1424:
1425: sub createnewsty {
1426: my $filecontents=(<<SIMPLECONTENT);
1427: <definetag name="">
1428: <render>
1429: <web></web>
1430: <tex></tex>
1431: </render>
1432: </definetag>
1433: SIMPLECONTENT
1434: return $filecontents;
1435: }
1436:
1437: sub createnewjs {
1438: my $filecontents=(<<SIMPLECONTENT);
1439: <script type="text/javascript" language="Javascript">
1440:
1441: </script>
1442: SIMPLECONTENT
1443: return $filecontents;
1444: }
1445:
1446: sub verify_html {
1447: my ($filecontents)=@_;
1448: my ($is_html,$is_xml);
1449: if ($filecontents =~/(?:\<|\<\;)\?xml[^\<]*\?(?:\>|\>\;)/is) {
1450: $is_xml = 1;
1451: } elsif ($filecontents =~/(?:\<|\<\;)html(?:\s+[^\<]+|\s*)(?:\>|\>\;)/is) {
1452: $is_html = 1;
1453: }
1454: unless ($is_xml || $is_html) {
1455: return &mt('File does not have [_1] or [_2] starting tag','<html>','<?xml ?>');
1456: }
1457: if ($is_html) {
1458: if ($filecontents!~/(?:\<|\<\;)\/html(?:\>|\>\;)/is) {
1459: return &mt('File does not have [_1] ending tag','<html>');
1460: }
1461: if ($filecontents!~/(?:\<|\<\;)(?:body|frameset)[^\<]*(?:\>|\>\;)/is) {
1462: return &mt('File does not have [_1] or [_2] starting tag','<body>','<frameset>');
1463: }
1464: if ($filecontents!~/(?:\<|\<\;)\/(?:body|frameset)[^\<]*(?:\>|\>\;)/is) {
1465: return &mt('File does not have [_1] or [_2] ending tag','<body>','<frameset>');
1466: }
1467: }
1468: return '';
1469: }
1470:
1471: sub renderingoptions {
1472: my %langchoices=('' => '');
1473: foreach (&Apache::loncommon::languageids()) {
1474: if (&Apache::loncommon::supportedlanguagecode($_)) {
1475: $langchoices{&Apache::loncommon::supportedlanguagecode($_)}
1476: = &Apache::loncommon::plainlanguagedescription($_);
1477: }
1478: }
1479: my $output;
1480: unless ($env{'form.forceedit'}) {
1481: $output .=
1482: '<span class="LC_nobreak">'.
1483: &mt('Language:').' '.
1484: &Apache::loncommon::select_form(
1485: $env{'form.languages'},
1486: 'languages',
1487: {&Apache::lonlocal::texthash(%langchoices)}).
1488: '</span>';
1489: }
1490: $output .=
1491: ' <span class="LC_nobreak">'.
1492: &mt('Math Rendering:').' '.
1493: &Apache::loncommon::select_form(
1494: $env{'form.texengine'},
1495: 'texengine',
1496: {&Apache::lonlocal::texthash
1497: ('' => '',
1498: 'tth' => 'tth (TeX to HTML)',
1499: 'MathJax' => 'MathJax',
1500: 'jsMath' => 'jsMath',
1501: 'mimetex' => 'mimetex (Convert to Images)')}).
1502: '</span>';
1503: return $output;
1504: }
1505:
1506: sub inserteditinfo {
1507: my ($filecontents, $filetype, $filename)=@_;
1508: $filecontents = &HTML::Entities::encode($filecontents,'<>&"');
1509: my $xml_help = '';
1510: my $initialize='';
1511: my $textarea_id = 'filecont';
1512: my $dragmath_button;
1513: my ($add_to_onload, $add_to_onresize);
1514: $initialize=&Apache::lonhtmlcommon::spellheader();
1515: if (($filetype eq 'html') && (&Apache::lonhtmlcommon::htmlareabrowser())) {
1516: my $lang = &Apache::lonhtmlcommon::htmlarea_lang();
1517: my %textarea_args = (
1518: fullpage => 'true',
1519: dragmath => 'math',
1520: );
1521: $initialize .= &Apache::lonhtmlcommon::htmlareaselectactive(\%textarea_args);
1522: }
1523: $initialize .= (<<FULLPAGE);
1524: <script type="text/javascript">
1525: // <![CDATA[
1526: function initDocument() {
1527: resize_textarea('$textarea_id','LC_aftertextarea');
1528: }
1529: // ]]>
1530: </script>
1531: FULLPAGE
1532: if ($filetype eq 'html') {
1533: $dragmath_button = '<span id="math_filecont">'.&Apache::lonhtmlcommon::dragmath_button('filecont',1).'</span>';
1534: $initialize .= "\n".&Apache::lonhtmlcommon::dragmath_js('EditMathPopup');
1535: }
1536: $add_to_onload = 'initDocument();';
1537: $add_to_onresize = "resize_textarea('$textarea_id','LC_aftertextarea');";
1538:
1539: if ($filetype eq 'html') {
1540: $xml_help=&Apache::loncommon::helpLatexCheatsheet();
1541: }
1542:
1543: my $titledisplay=&display_title();
1544: my $textareaclass;
1545: my %lt=&Apache::lonlocal::texthash('st' => 'Save and Edit',
1546: 'vi' => 'Save and View',
1547: 'dv' => 'Discard Edits and View',
1548: 'un' => 'undo',
1549: 'ed' => 'Edit');
1550: my $spelllink = &Apache::lonhtmlcommon::spelllink('xmledit','filecont');
1551: my $textarea_events = &Apache::edit::element_change_detection();
1552: my $form_events = &Apache::edit::form_change_detection();
1553: my $htmlerror;
1554: if ($filetype eq 'html') {
1555: $htmlerror=&verify_html($filecontents);
1556: if ($htmlerror) {
1557: $htmlerror='<span class="LC_error">'.$htmlerror.'</span>';
1558: }
1559: if (&Apache::lonhtmlcommon::htmlareabrowser()) {
1560: $textareaclass = 'class="LC_richDefaultOff"';
1561: }
1562: }
1563: my $editfooter=(<<ENDFOOTER);
1564: $initialize
1565: <a name="editsection" />
1566: <form $form_events method="post" name="xmledit">
1567: <div class="LC_edit_problem_editxml_header">
1568: <table class="LC_edit_problem_header_title"><tr><td>
1569: $filename
1570: </td><td align="right">
1571: $xml_help
1572: </td></tr>
1573: </table>
1574: <div class="LC_edit_problem_discards">
1575: <input type="submit" name="discardview" accesskey="d" value="$lt{'dv'}" />
1576: <input type="submit" name="Undo" accesskey="u" value="$lt{'un'}" />
1577: $htmlerror $dragmath_button
1578: </div>
1579: <div class="LC_edit_problem_saves">
1580: <input type="submit" name="savethisfile" accesskey="s" value="$lt{'st'}" />
1581: <input type="submit" name="viewmode" accesskey="v" value="$lt{'vi'}" />
1582: </div>
1583: </div>
1584: <textarea $textarea_events style="width:100%" cols="80" rows="44" name="filecont" id="filecont" $textareaclass>$filecontents</textarea><br />$spelllink
1585: <div id="LC_aftertextarea">
1586: <br />
1587: $titledisplay
1588: </div>
1589: </form>
1590: </body>
1591: ENDFOOTER
1592: return ($editfooter,$add_to_onload,$add_to_onresize);;
1593: }
1594:
1595: sub get_target {
1596: my $viewgrades=&Apache::lonnet::allowed('vgr',$env{'request.course.id'});
1597: if ( $env{'request.state'} eq 'published') {
1598: if ( defined($env{'form.grade_target'})
1599: && ($viewgrades == 'F' )) {
1600: return ($env{'form.grade_target'});
1601: } elsif (defined($env{'form.grade_target'})) {
1602: if (($env{'form.grade_target'} eq 'web') ||
1603: ($env{'form.grade_target'} eq 'tex') ) {
1604: return $env{'form.grade_target'}
1605: } else {
1606: return 'web';
1607: }
1608: } else {
1609: return 'web';
1610: }
1611: } elsif ($env{'request.state'} eq 'construct') {
1612: if ( defined($env{'form.grade_target'})) {
1613: return ($env{'form.grade_target'});
1614: } else {
1615: return 'web';
1616: }
1617: } else {
1618: return 'web';
1619: }
1620: }
1621:
1622: sub handler {
1623: my $request=shift;
1624:
1625: my $target=&get_target();
1626: $Apache::lonxml::debug=$env{'user.debug'};
1627:
1628: &Apache::loncommon::content_type($request,'text/html');
1629: &Apache::loncommon::no_cache($request);
1630: if ($env{'request.state'} eq 'published') {
1631: $request->set_last_modified(&Apache::lonnet::metadata($request->uri,
1632: 'lastrevisiondate'));
1633: }
1634: # Embedded Flash movies from Camtasia served from https will not display in IE
1635: # if XML config file has expired from cache.
1636: if ($ENV{'SERVER_PORT'} == 443) {
1637: if ($request->uri =~ /\.xml$/) {
1638: my ($httpbrowser,$clientbrowser) =
1639: &Apache::loncommon::decode_user_agent($request);
1640: if ($clientbrowser =~ /^explorer$/i) {
1641: delete $request->headers_out->{'Cache-control'};
1642: delete $request->headers_out->{'Pragma'};
1643: my $expiration = time + 60;
1644: my $date=strftime("%a, %d %b %Y %H:%M:%S GMT",gmtime($expiration));
1645: $request->headers_out->set("Expires" => $date);
1646: }
1647: }
1648: }
1649: $request->send_http_header;
1650:
1651: return OK if $request->header_only;
1652:
1653:
1654: my $file=&Apache::lonnet::filelocation("",$request->uri);
1655: my ($filetype,$breadcrumbtext);
1656: if ($file =~ /\.(sty|css|js|txt|tex)$/) {
1657: $filetype=$1;
1658: } else {
1659: $filetype='html';
1660: }
1661: if ($filetype eq 'sty') {
1662: $breadcrumbtext = 'Style File Editor';
1663: } elsif ($filetype eq 'js') {
1664: $breadcrumbtext = 'Javascript Editor';
1665: } elsif ($filetype eq 'css') {
1666: $breadcrumbtext = 'CSS Editor';
1667: } elsif ($filetype eq 'txt') {
1668: $breadcrumbtext = 'Text Editor';
1669: } elsif ($filetype eq 'tex') {
1670: $breadcrumbtext = 'TeX Editor';
1671: } else {
1672: $breadcrumbtext = 'HTML Editor';
1673: }
1674:
1675: #
1676: # Edit action? Save file.
1677: #
1678: if (!($env{'request.state'} eq 'published')) {
1679: if ($env{'form.savethisfile'} || $env{'form.viewmode'} || $env{'form.Undo'}) {
1680: my $html_file=&Apache::lonnet::getfile($file);
1681: my $error = &Apache::lonhomework::handle_save_or_undo($request, \$html_file, \$env{'form.filecont'});
1682: if ($env{'form.savethisfile'}) {
1683: $env{'form.editmode'}='Edit'; #force edit mode
1684: }
1685: }
1686: }
1687: my %mystyle;
1688: my $result = '';
1689: my $filecontents=&Apache::lonnet::getfile($file);
1690: if ($filecontents eq -1) {
1691: my $start_page=&Apache::loncommon::start_page('File Error');
1692: my $end_page=&Apache::loncommon::end_page();
1693: my $errormsg='<p class="LC_error">'
1694: .&mt('File not found: [_1]'
1695: ,'<span class="LC_filename">'.$file.'</span>')
1696: .'</p>';
1697: $result=(<<ENDNOTFOUND);
1698: $start_page
1699: $errormsg
1700: $end_page
1701: ENDNOTFOUND
1702: $filecontents='';
1703: if ($env{'request.state'} ne 'published') {
1704: if ($filetype eq 'sty') {
1705: $filecontents=&createnewsty();
1706: } elsif ($filetype eq 'js') {
1707: $filecontents=&createnewjs();
1708: } elsif ($filetype ne 'css' && $filetype ne 'txt' && $filetype ne 'tex') {
1709: $filecontents=&createnewhtml();
1710: }
1711: $env{'form.editmode'}='Edit'; #force edit mode
1712: }
1713: } else {
1714: unless ($env{'request.state'} eq 'published') {
1715: if ($filecontents=~/BEGIN LON-CAPA Internal/) {
1716: &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.'));
1717: }
1718: #
1719: # we are in construction space, see if edit mode forced
1720: &Apache::loncommon::get_unprocessed_cgi($ENV{'QUERY_STRING'},
1721: ['editmode']);
1722: }
1723: if (!$env{'form.editmode'} || $env{'form.viewmode'} || $env{'form.discardview'}) {
1724: if ($filetype eq 'html' || $filetype eq 'sty') {
1725: &Apache::structuretags::reset_problem_globals();
1726: $result = &Apache::lonxml::xmlparse($request,$target,
1727: $filecontents,'',%mystyle);
1728: # .html files may contain <problem> or <Task> need to clean
1729: # up if it did
1730: &Apache::structuretags::reset_problem_globals();
1731: &Apache::lonhomework::finished_parsing();
1732: } elsif ($filetype eq 'tex') {
1733: $result = &Apache::lontexconvert::converted(\$filecontents,
1734: $env{'form.texengine'});
1735: if ($env{'form.return_only_error_and_warning_counts'}) {
1736: $result = "$errorcount:$warningcount";
1737: }
1738: } else {
1739: $result = $filecontents;
1740: }
1741: &Apache::loncommon::get_unprocessed_cgi($ENV{'QUERY_STRING'},
1742: ['rawmode']);
1743: if ($env{'form.rawmode'}) { $result = $filecontents; }
1744: if (($filetype ne 'html') &&
1745: (!$env{'form.return_only_error_and_warning_counts'})) {
1746: my $nochgview = 1;
1747: my $controls = '';
1748: if ($env{'request.state'} eq 'construct') {
1749: $controls = &Apache::loncommon::head_subbox(
1750: &Apache::loncommon::CSTR_pageheader()
1751: .&Apache::londefdef::edit_controls($nochgview));
1752: }
1753: if ($filetype ne 'sty' && $filetype ne 'tex') {
1754: $result =~ s/</</g;
1755: $result =~ s/>/>/g;
1756: $result = '<table class="LC_sty_begin">'.
1757: '<tr><td><b><pre>'.$result.
1758: '</pre></b></td></tr></table>';
1759: }
1760: my $brcrum;
1761: if ($env{'request.state'} eq 'construct') {
1762: $brcrum = [{'href' => &Apache::loncommon::authorspace($request->uri),
1763: 'text' => 'Construction Space'},
1764: {'href' => '',
1765: 'text' => $breadcrumbtext}];
1766: } else {
1767: $brcrum = ''; # FIXME: Where are we?
1768: }
1769: my %options = ('bread_crumbs' => $brcrum,
1770: 'bgcolor' => '#FFFFFF');
1771: $result =
1772: &Apache::loncommon::start_page(undef,undef,\%options)
1773: .$controls
1774: .$result
1775: .&Apache::loncommon::end_page();
1776: }
1777: }
1778: }
1779:
1780: #
1781: # Edit action? Insert editing commands
1782: #
1783: unless ($env{'request.state'} eq 'published') {
1784: if ($env{'form.editmode'} && (!($env{'form.viewmode'})) && (!($env{'form.discardview'})))
1785: {
1786: my $displayfile=$request->uri;
1787: $displayfile=~s/^\/[^\/]*//;
1788:
1789: my ($edit_info, $add_to_onload, $add_to_onresize)=
1790: &inserteditinfo($filecontents,$filetype,$displayfile);
1791:
1792: my %options =
1793: ('add_entries' =>
1794: {'onresize' => $add_to_onresize,
1795: 'onload' => $add_to_onload, });
1796: my $header;
1797: if ($env{'request.state'} eq 'construct') {
1798: $options{'bread_crumbs'} = [{
1799: 'href' => &Apache::loncommon::authorspace($request->uri),
1800: 'text' => 'Construction Space'},
1801: {'href' => '',
1802: 'text' => $breadcrumbtext}];
1803: $header = &Apache::loncommon::head_subbox(
1804: &Apache::loncommon::CSTR_pageheader());
1805: }
1806: my $js =
1807: &Apache::edit::js_change_detection().
1808: &Apache::loncommon::resize_textarea_js();
1809: my $start_page = &Apache::loncommon::start_page(undef,$js,
1810: \%options);
1811: $result = $start_page
1812: .$header
1813: .&Apache::lonxml::message_location()
1814: .$edit_info
1815: .&Apache::loncommon::end_page();
1816: }
1817: }
1818: if ($filetype eq 'html') { &writeallows($request->uri); }
1819:
1820: &Apache::lonxml::add_messages(\$result);
1821: $request->print($result);
1822:
1823: return OK;
1824: }
1825:
1826: sub display_title {
1827: my $result;
1828: if ($env{'request.state'} eq 'construct') {
1829: my $title=&Apache::lonnet::gettitle();
1830: if (!defined($title) || $title eq '') {
1831: $title = $env{'request.filename'};
1832: $title = substr($title, rindex($title, '/') + 1);
1833: }
1834: $result = "<script type='text/javascript'>top.document.title = '$title - LON-CAPA "
1835: .&mt('Construction Space')."';</script>";
1836: }
1837: return $result;
1838: }
1839:
1840: sub debug {
1841: if ($Apache::lonxml::debug eq "1") {
1842: $|=1;
1843: my $request=$Apache::lonxml::request;
1844: if (!$request) {
1845: eval { $request=Apache->request; };
1846: }
1847: if (!$request) {
1848: eval { $request=Apache2::RequestUtil->request; };
1849: }
1850: $request->print('<font size="-2"><pre>DEBUG:'.&HTML::Entities::encode($_[0],'<>&"')."</pre></font>\n");
1851: #&Apache::lonnet::logthis($_[0]);
1852: }
1853: }
1854:
1855: sub show_error_warn_msg {
1856: if (($env{'request.filename'} eq
1857: $Apache::lonnet::perlvar{'lonDocRoot'}.'/res/lib/templates/simpleproblem.problem') &&
1858: (&Apache::lonnet::allowed('mdc',$env{'request.course.id'}))) {
1859: return 1;
1860: }
1861: return (($Apache::lonxml::debug eq 1) ||
1862: ($env{'request.state'} eq 'construct') ||
1863: ($Apache::lonhomework::browse eq 'F'
1864: &&
1865: $env{'form.show_errors'} eq 'on'));
1866: }
1867:
1868: sub error {
1869: my @errors = @_;
1870:
1871: $errorcount++;
1872:
1873: $Apache::lonxml::internal_error=1;
1874:
1875: if (defined($Apache::inputtags::part)) {
1876: if ( @Apache::inputtags::response ) {
1877: push(@errors,
1878: &mt("This error occurred while processing response [_1] in part [_2]",
1879: $Apache::inputtags::response[-1],
1880: $Apache::inputtags::part));
1881: } else {
1882: push(@errors,
1883: &mt("This error occurred while processing part [_1]",
1884: $Apache::inputtags::part));
1885: }
1886: }
1887:
1888: if ( &show_error_warn_msg() ) {
1889: # If printing in construction space, put the error inside <pre></pre>
1890: push(@Apache::lonxml::error_messages,
1891: $Apache::lonxml::warnings_error_header
1892: .'<div class="LC_error">'
1893: .'<b>'.&mt('ERROR:').' </b>'.join("<br />\n",@errors)
1894: ."</div>\n");
1895: $Apache::lonxml::warnings_error_header='';
1896: } else {
1897: my $errormsg;
1898: my ($symb)=&Apache::lonnet::symbread();
1899: if ( !$symb ) {
1900: #public or browsers
1901: $errormsg=&mt("An error occurred while processing this resource. The author has been notified.");
1902: }
1903: my $host=$Apache::lonnet::perlvar{'lonHostID'};
1904: push(@errors,
1905: &mt("The error occurred on host [_1]",
1906: "<tt>$host</tt>"));
1907:
1908: my $msg = join('<br />', @errors);
1909:
1910: #notify author
1911: &Apache::lonmsg::author_res_msg($env{'request.filename'},$msg);
1912: #notify course
1913: if ( $symb && $env{'request.course.id'} ) {
1914: my $cnum=$env{'course.'.$env{'request.course.id'}.'.num'};
1915: my $cdom=$env{'course.'.$env{'request.course.id'}.'.domain'};
1916: my (undef,%users)=&Apache::lonmsg::decide_receiver(undef,0,1,1,1);
1917: my $declutter=&Apache::lonnet::declutter($env{'request.filename'});
1918: my $baseurl = &Apache::lonnet::clutter($declutter);
1919: my @userlist;
1920: foreach (keys %users) {
1921: my ($user,$domain) = split(/:/, $_);
1922: push(@userlist,"$user\@$domain");
1923: my $key=$declutter.'_'.$user.'_'.$domain;
1924: my %lastnotified=&Apache::lonnet::get('nohist_xmlerrornotifications',
1925: [$key],
1926: $cdom,$cnum);
1927: my $now=time;
1928: if ($now-$lastnotified{$key}>86400) {
1929: my $title = &Apache::lonnet::gettitle($symb);
1930: my $sentmessage;
1931: &Apache::lonmsg::user_normal_msg($user,$domain,
1932: "Error [$title]",$msg,'',$baseurl,'','',
1933: \$sentmessage,$symb,$title,1);
1934: &Apache::lonnet::put('nohist_xmlerrornotifications',
1935: {$key => $now},
1936: $cdom,$cnum);
1937: }
1938: }
1939: if ($env{'request.role.adv'}) {
1940: $errormsg=&mt("An error occurred while processing this resource. The course personnel ([_1]) and the author have been notified.",join(', ',@userlist));
1941: } else {
1942: $errormsg=&mt("An error occurred while processing this resource. The instructor has been notified.");
1943: }
1944: }
1945: push(@Apache::lonxml::error_messages,"<b>$errormsg</b> <br />");
1946: }
1947: }
1948:
1949: sub warning {
1950: $warningcount++;
1951:
1952: if ($env{'form.grade_target'} ne 'tex') {
1953: if ( &show_error_warn_msg() ) {
1954: push(@Apache::lonxml::warning_messages,
1955: $Apache::lonxml::warnings_error_header
1956: .'<div class="LC_warning">'
1957: .&mt('[_1]W[_2]ARNING','<b>','</b>')."<b>:</b> ".join('<br />',@_)
1958: ."</div>\n"
1959: );
1960: $Apache::lonxml::warnings_error_header='';
1961: }
1962: }
1963: }
1964:
1965: sub info {
1966: if ($env{'form.grade_target'} ne 'tex'
1967: && $env{'request.state'} eq 'construct') {
1968: push(@Apache::lonxml::info_messages,join('<br />',@_)."<br />\n");
1969: }
1970: }
1971:
1972: sub message_location {
1973: return '__LONCAPA_INTERNAL_MESSAGE_LOCATION__';
1974: }
1975:
1976: sub add_messages {
1977: my ($msg)=@_;
1978: my $result=join(' ',
1979: @Apache::lonxml::info_messages,
1980: @Apache::lonxml::error_messages,
1981: @Apache::lonxml::warning_messages);
1982: undef(@Apache::lonxml::info_messages);
1983: undef(@Apache::lonxml::error_messages);
1984: undef(@Apache::lonxml::warning_messages);
1985: $$msg=~s/__LONCAPA_INTERNAL_MESSAGE_LOCATION__/$result/;
1986: $$msg=~s/__LONCAPA_INTERNAL_MESSAGE_LOCATION__//g;
1987: }
1988:
1989: sub get_param {
1990: my ($param,$parstack,$safeeval,$context,$case_insensitive) = @_;
1991: if ( ! $context ) { $context = -1; }
1992: my $args ='';
1993: if ( $#$parstack > (-2-$context) ) { $args=$$parstack[$context]; }
1994: if ( ! $Apache::lonxml::usestyle ) {
1995: $args=$Apache::lonxml::style_values.$args;
1996: }
1997: if ( ! $args ) { return undef; }
1998: if ( $case_insensitive ) {
1999: if ($args =~ s/(my (?:.*))(\$\Q$param\E[,\)])/$1.lc($2)/ei) {
2000: return &Apache::run::run("{$args;".'return $'.$param.'}',
2001: $safeeval); #'
2002: } else {
2003: return undef;
2004: }
2005: } else {
2006: if ( $args =~ /my .*\$\Q$param\E[,\)]/ ) {
2007: return &Apache::run::run("{$args;".'return $'.$param.'}',
2008: $safeeval); #'
2009: } else {
2010: return undef;
2011: }
2012: }
2013: }
2014:
2015: sub get_param_var {
2016: my ($param,$parstack,$safeeval,$context,$case_insensitive) = @_;
2017: if ( ! $context ) { $context = -1; }
2018: my $args ='';
2019: if ( $#$parstack > (-2-$context) ) { $args=$$parstack[$context]; }
2020: if ( ! $Apache::lonxml::usestyle ) {
2021: $args=$Apache::lonxml::style_values.$args;
2022: }
2023: &Apache::lonxml::debug("Args are $args param is $param");
2024: if ($case_insensitive) {
2025: if (! ($args=~s/(my (?:.*))(\$\Q$param\E[,\)])/$1.lc($2)/ei)) {
2026: return undef;
2027: }
2028: } elsif ( $args !~ /my .*\$\Q$param\E[,\)]/ ) { return undef; }
2029: my $value=&Apache::run::run("{$args;".'return $'.$param.'}',$safeeval); #'
2030: &Apache::lonxml::debug("first run is $value");
2031: if ($value =~ /^[\$\@\%][a-zA-Z_]\w*$/) {
2032: &Apache::lonxml::debug("doing second");
2033: my @result=&Apache::run::run("return $value",$safeeval,1);
2034: if (!defined($result[0])) {
2035: return $value
2036: } else {
2037: if (wantarray) { return @result; } else { return $result[0]; }
2038: }
2039: } else {
2040: return $value;
2041: }
2042: }
2043:
2044: sub register_insert_xml {
2045: my $parser = HTML::LCParser->new($Apache::lonnet::perlvar{'lonTabDir'}
2046: .'/insertlist.xml');
2047: my ($tagnum,$in_help)=(0,0);
2048: my @alltags;
2049: my $tag;
2050: while (my $token = $parser->get_token()) {
2051: if ($token->[0] eq 'S') {
2052: my $key;
2053: if ($token->[1] eq 'tag') {
2054: $tag = $token->[2]{'name'};
2055: if (defined($tag)) {
2056: $insertlist{$tagnum.'.tag'} = $tag;
2057: $insertlist{$tag.'.num'} = $tagnum;
2058: push(@alltags,$tag);
2059: }
2060: } elsif ($in_help && $token->[1] eq 'file') {
2061: $key = $tag.'.helpfile';
2062: } elsif ($in_help && $token->[1] eq 'description') {
2063: $key = $tag.'.helpdesc';
2064: } elsif ($token->[1] eq 'description' ||
2065: $token->[1] eq 'color' ||
2066: $token->[1] eq 'show' ) {
2067: $key = $tag.'.'.$token->[1];
2068: } elsif ($token->[1] eq 'insert_sub') {
2069: $key = $tag.'.function';
2070: } elsif ($token->[1] eq 'help') {
2071: $in_help=1;
2072: } elsif ($token->[1] eq 'allow') {
2073: $key = $tag.'.allow';
2074: }
2075: if (defined($key)) {
2076: $insertlist{$key} = $parser->get_text();
2077: $insertlist{$key} =~ s/(^\s*|\s*$ )//gx;
2078: }
2079: } elsif ($token->[0] eq 'E') {
2080: if ($token->[1] eq 'tag') {
2081: undef($tag);
2082: $tagnum++;
2083: } elsif ($token->[1] eq 'help') {
2084: undef($in_help);
2085: }
2086: }
2087: }
2088:
2089: # parse the allows and ignore tags set to <show>no</show>
2090: foreach my $tag (@alltags) {
2091: next if (!exists($insertlist{$tag.'.allow'}));
2092: my $allow = $insertlist{$tag.'.allow'};
2093: foreach my $element (split(',',$allow)) {
2094: $element =~ s/(^\s*|\s*$ )//gx;
2095: if (!exists($insertlist{$element.'.show'})
2096: || $insertlist{$element.'.show'} ne 'no') {
2097: push(@{ $insertlist{$tag.'.which'} },$element);
2098: }
2099: }
2100: }
2101: }
2102:
2103: sub register_insert {
2104: return ®ister_insert_xml(@_);
2105: # &dump_insertlist('2');
2106: }
2107:
2108: sub dump_insertlist {
2109: my ($ext) = @_;
2110: open(XML,">/tmp/insertlist.xml.$ext");
2111: print XML ("<insertlist>");
2112: my $i=0;
2113:
2114: while (exists($insertlist{"$i.tag"})) {
2115: my $tag = $insertlist{"$i.tag"};
2116: print XML ("
2117: \t<tag name=\"$tag\">");
2118: if (defined($insertlist{"$tag.description"})) {
2119: print XML ("
2120: \t\t<description>".$insertlist{"$tag.description"}."</description>");
2121: }
2122: if (defined($insertlist{"$tag.color"})) {
2123: print XML ("
2124: \t\t<color>".$insertlist{"$tag.color"}."</color>");
2125: }
2126: if (defined($insertlist{"$tag.function"})) {
2127: print XML ("
2128: \t\t<insert_sub>".$insertlist{"$tag.function"}."</insert_sub>");
2129: }
2130: if (defined($insertlist{"$tag.show"})
2131: && $insertlist{"$tag.show"} ne 'yes') {
2132: print XML ("
2133: \t\t<show>".$insertlist{"$tag.show"}."</show>");
2134: }
2135: if (defined($insertlist{"$tag.helpfile"})) {
2136: print XML ("
2137: \t\t<help>
2138: \t\t\t<file>".$insertlist{"$tag.helpfile"}."</file>");
2139: if ($insertlist{"$tag.helpdesc"} ne '') {
2140: print XML ("
2141: \t\t\t<description>".$insertlist{"$tag.helpdesc"}."</description>");
2142: }
2143: print XML ("
2144: \t\t</help>");
2145: }
2146: if (defined($insertlist{"$tag.which"})) {
2147: print XML ("
2148: \t\t<allow>".join(',',sort(@{ $insertlist{"$tag.which"} }))."</allow>");
2149: }
2150: print XML ("
2151: \t</tag>");
2152: $i++;
2153: }
2154: print XML ("\n</insertlist>\n");
2155: close(XML);
2156: }
2157:
2158: sub description {
2159: my ($token)=@_;
2160: my $tag = &get_tag($token);
2161: return $insertlist{$tag.'.description'};
2162: }
2163:
2164: # Returns a list containing the help file, and the description
2165: sub helpinfo {
2166: my ($token)=@_;
2167: my $tag = &get_tag($token);
2168: return ($insertlist{$tag.'.helpfile'}, $insertlist{$tag.'.helpdesc'});
2169: }
2170:
2171: sub get_tag {
2172: my ($token)=@_;
2173: my $tagnum;
2174: my $tag=$token->[1];
2175: foreach my $namespace (reverse(@Apache::lonxml::namespace)) {
2176: my $testtag = $namespace.'::'.$tag;
2177: $tagnum = $insertlist{"$testtag.num"};
2178: last if (defined($tagnum));
2179: }
2180: if (!defined($tagnum)) {
2181: $tagnum = $Apache::lonxml::insertlist{"$tag.num"};
2182: }
2183: return $insertlist{"$tagnum.tag"};
2184: }
2185:
2186: ############################################################
2187: # PDF-FORM-METHODS
2188:
2189: =pod
2190:
2191: =item &print_pdf_radiobutton(fieldname, value)
2192:
2193: Returns a latexline to generate a PDF-Form-Radiobutton.
2194: Note: Radiobuttons with equal names are automaticly grouped
2195: in a selection-group.
2196:
2197: $fieldname: PDF internalname of the radiobutton(group)
2198: $value: Value of radiobutton
2199:
2200: =cut
2201: sub print_pdf_radiobutton {
2202: my ($fieldname, $value) = @_;
2203: return '\radioButton[\symbolchoice{circle}]{'
2204: .$fieldname.'}{10bp}{10bp}{'.$value.'}';
2205: }
2206:
2207:
2208: =pod
2209:
2210: =item &print_pdf_start_combobox(fieldname)
2211:
2212: Starts a latexline to generate a PDF-Form-Combobox with text.
2213:
2214: $fieldname: PDF internal name of the Combobox
2215:
2216: =cut
2217: sub print_pdf_start_combobox {
2218: my $result;
2219: my ($fieldName) = @_;
2220: $result .= '\begin{tabularx}{\textwidth}{p{2.5cm}X}'."\n";
2221: $result .= '\comboBox[]{'.$fieldName.'}{2.3cm}{14bp}{'; #
2222:
2223: return $result;
2224: }
2225:
2226:
2227: =pod
2228:
2229: =item &print_pdf_add_combobox_option(options)
2230:
2231: Generates a latexline to add Options to a PDF-Form-ComboBox.
2232:
2233: $option: PDF internal name of the Combobox-Option
2234:
2235: =cut
2236: sub print_pdf_add_combobox_option {
2237:
2238: my $result;
2239: my ($option) = @_;
2240:
2241: $result .= '('.$option.')';
2242:
2243: return $result;
2244: }
2245:
2246:
2247: =pod
2248:
2249: =item &print_pdf_end_combobox(text) {
2250:
2251: Returns latexcode to end a PDF-Form-Combobox with text.
2252:
2253: =cut
2254: sub print_pdf_end_combobox {
2255: my $result;
2256: my ($text) = @_;
2257:
2258: $result .= '}&'.$text."\\\\\n";
2259: $result .= '\end{tabularx}' . "\n";
2260: $result .= '\hspace{2mm}' . "\n";
2261: return $result;
2262: }
2263:
2264:
2265: =pod
2266:
2267: =item &print_pdf_hiddenField(fieldname, user, domain)
2268:
2269: Returns a latexline to generate a PDF-Form-hiddenField with userdata.
2270:
2271: $fieldname label for hiddentextfield
2272: $user: name of user
2273: $domain: domain of user
2274:
2275: =cut
2276: sub print_pdf_hiddenfield {
2277: my $result;
2278: my ($fieldname, $user, $domain) = @_;
2279:
2280: $result .= '\textField [\F{\FHidden}\F{-\FPrint}\V{'.$domain.'&'.$user.'}]{'.$fieldname.'}{0in}{0in}'."\n";
2281:
2282: return $result;
2283: }
2284:
2285: 1;
2286: __END__
2287:
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