1: # The LearningOnline Network with CAPA
2: # XML Parser Module
3: #
4: # $Id: lonxml.pm,v 1.494 2009/04/17 01:00:20 www Exp $
5: #
6: # Copyright Michigan State University Board of Trustees
7: #
8: # This file is part of the LearningOnline Network with CAPA (LON-CAPA).
9: #
10: # LON-CAPA is free software; you can redistribute it and/or modify
11: # it under the terms of the GNU General Public License as published by
12: # the Free Software Foundation; either version 2 of the License, or
13: # (at your option) any later version.
14: #
15: # LON-CAPA is distributed in the hope that it will be useful,
16: # but WITHOUT ANY WARRANTY; without even the implied warranty of
17: # MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
18: # GNU General Public License for more details.
19: #
20: # You should have received a copy of the GNU General Public License
21: # along with LON-CAPA; if not, write to the Free Software
22: # Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA 02111-1307 USA
23: #
24: # /home/httpd/html/adm/gpl.txt
25: #
26: # http://www.lon-capa.org/
27: #
28: # Copyright for TtHfunc and TtMfunc by Ian Hutchinson.
29: # TtHfunc and TtMfunc (the "Code") may be compiled and linked into
30: # binary executable programs or libraries distributed by the
31: # Michigan State University (the "Licensee"), but any binaries so
32: # distributed are hereby licensed only for use in the context
33: # of a program or computational system for which the Licensee is the
34: # primary author or distributor, and which performs substantial
35: # additional tasks beyond the translation of (La)TeX into HTML.
36: # The C source of the Code may not be distributed by the Licensee
37: # to any other parties under any circumstances.
38: #
39:
40: =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:
115: #==================================== Main subroutine: xmlparse
116:
117: #debugging control, to turn on debugging modify the correct handler
118:
119: $Apache::lonxml::debug=0;
120:
121: # keeps count of the number of warnings and errors generated in a parse
122: $warningcount=0;
123: $errorcount=0;
124:
125: #path to the directory containing the file currently being processed
126: @pwd=();
127:
128: #these two are used for capturing a subset of the output for later processing,
129: #don't touch them directly use &startredirection and &endredirection
130: @outputstack = ();
131: $redirection = 0;
132:
133: #controls wheter the <import> tag actually does
134: $import = 1;
135: @extlinks=();
136:
137: # meta mode is a bit weird only some output is to be turned off
138: #<output> tag turns metamode off (defined in londefdef.pm)
139: $metamode = 0;
140:
141: # turns on and of run::evaluate actually derefencing var refs
142: $evaluate = 1;
143:
144: # data structure for eidt mode, determines what tags can go into what other tags
145: %insertlist=();
146:
147: # stores the list of active tag namespaces
148: @namespace=();
149:
150: # stores all Scrit Vars displays for later showing
151: my @script_var_displays=();
152:
153: # a pointer the the Apache request object
154: $Apache::lonxml::request='';
155:
156: # a problem number counter, and check on ether it is used
157: $Apache::lonxml::counter=1;
158: $Apache::lonxml::counter_changed=0;
159:
160: # Part counter hash. In analysis mode, the
161: # problems can use this to record which parts increment the counter
162: # by how much. The counter subs will maintain this hash via
163: # their optional part parameters. Note that the assumption is that
164: # analysis is done in one request and therefore it is not necessary to
165: # save this information request-to-request.
166:
167:
168: %Apache::lonxml::counters_per_part = ();
169:
170: #internal check on whether to look at style defs
171: $Apache::lonxml::usestyle=1;
172:
173: #locations used to store the parameter string for style substitutions
174: $Apache::lonxml::style_values='';
175: $Apache::lonxml::style_end_values='';
176:
177: #array of ssi calls that need to occur after we are done parsing
178: @Apache::lonxml::ssi_info=();
179:
180: #should we do the postag variable interpolation
181: $Apache::lonxml::post_evaluate=1;
182:
183: #a header message to emit in the case of any generated warning or errors
184: $Apache::lonxml::warnings_error_header='';
185:
186: # Control whether or not LaTeX symbols should be substituted for their
187: # \ style equivalents...this may be turned off e.g. in an verbatim
188: # environment.
189:
190: $Apache::lonxml::substitute_LaTeX_symbols = 1; # Starts out on.
191:
192: sub enable_LaTeX_substitutions {
193: $Apache::lonxml::substitute_LaTeX_symbols = 1;
194: }
195: sub disable_LaTeX_substitutions {
196: $Apache::lonxml::substitute_LaTeX_symbols = 0;
197: }
198:
199: sub xmlend {
200: my ($target,$parser)=@_;
201: my $mode='xml';
202: my $status='OPEN';
203: if ($Apache::lonhomework::parsing_a_problem ||
204: $Apache::lonhomework::parsing_a_task ) {
205: $mode='problem';
206: $status=$Apache::inputtags::status[-1];
207: }
208: my $discussion;
209: &Apache::loncommon::get_unprocessed_cgi($ENV{'QUERY_STRING'},
210: ['LONCAPA_INTERNAL_no_discussion']);
211: if (! exists($env{'form.LONCAPA_INTERNAL_no_discussion'}) ||
212: $env{'form.LONCAPA_INTERNAL_no_discussion'} ne 'true') {
213: $discussion=&Apache::lonfeedback::list_discussion($mode,$status);
214: }
215: if ($target eq 'tex') {
216: $discussion.='<tex>\keephidden{ENDOFPROBLEM}\vskip 0.5mm\noindent\makebox[\textwidth/$number_of_columns][b]{\hrulefill}\end{document}</tex>';
217: &Apache::lonxml::newparser($parser,\$discussion,'');
218: return '';
219: }
220:
221: return $discussion;
222: }
223:
224: sub tokeninputfield {
225: my $defhost=$Apache::lonnet::perlvar{'lonHostID'};
226: $defhost=~tr/a-z/A-Z/;
227: return (<<ENDINPUTFIELD)
228: <script type="text/javascript">
229: function updatetoken() {
230: var comp=new Array;
231: var barcode=unescape(document.tokeninput.barcode.value);
232: comp=barcode.split('*');
233: if (typeof(comp[0])!="undefined") {
234: document.tokeninput.codeone.value=comp[0];
235: }
236: if (typeof(comp[1])!="undefined") {
237: document.tokeninput.codetwo.value=comp[1];
238: }
239: if (typeof(comp[2])!="undefined") {
240: comp[2]=comp[2].toUpperCase();
241: document.tokeninput.codethree.value=comp[2];
242: }
243: document.tokeninput.barcode.value='';
244: }
245: </script>
246: <form method="post" name="tokeninput">
247: <table border="2" bgcolor="#FFFFBB">
248: <tr><th>DocID Checkin</th></tr>
249: <tr><td>
250: <table>
251: <tr>
252: <td>Scan in Barcode</td>
253: <td><input type="text" size="22" name="barcode"
254: onChange="updatetoken()"/></td>
255: </tr>
256: <tr><td><i>or</i> Type in DocID</td>
257: <td>
258: <input type="text" size="5" name="codeone" />
259: <b><font size="+2">*</font></b>
260: <input type="text" size="5" name="codetwo" />
261: <b><font size="+2">*</font></b>
262: <input type="text" size="10" name="codethree" value="$defhost"
263: onChange="this.value=this.value.toUpperCase()" />
264: </td></tr>
265: </table>
266: </td></tr>
267: <tr><td><input type="submit" value="Check in DocID" /></td></tr>
268: </table>
269: </form>
270: ENDINPUTFIELD
271: }
272:
273: sub maketoken {
274: my ($symb,$tuname,$tudom,$tcrsid)=@_;
275: unless ($symb) {
276: $symb=&Apache::lonnet::symbread();
277: }
278: unless ($tuname) {
279: $tuname=$env{'user.name'};
280: $tudom=$env{'user.domain'};
281: $tcrsid=$env{'request.course.id'};
282: }
283:
284: return &Apache::lonnet::checkout($symb,$tuname,$tudom,$tcrsid);
285: }
286:
287: sub printtokenheader {
288: my ($target,$token,$tsymb,$tcrsid,$tudom,$tuname)=@_;
289: unless ($token) { return ''; }
290:
291: my ($symb,$courseid,$domain,$name) = &Apache::lonnet::whichuser();
292: unless ($tsymb) {
293: $tsymb=$symb;
294: }
295: unless ($tuname) {
296: $tuname=$name;
297: $tudom=$domain;
298: $tcrsid=$courseid;
299: }
300:
301: my $plainname=&Apache::loncommon::plainname($tuname,$tudom);
302:
303: if ($target eq 'web') {
304: my %idhash=&Apache::lonnet::idrget($tudom,($tuname));
305: return
306: '<img align="right" src="/cgi-bin/barcode.png?encode='.$token.'" />'.
307: &mt('Checked out for').' '.$plainname.
308: '<br />'.&mt('User').': '.$tuname.' at '.$tudom.
309: '<br />'.&mt('ID').': '.$idhash{$tuname}.
310: '<br />'.&mt('CourseID').': '.$tcrsid.
311: '<br />'.&mt('Course').': '.$env{'course.'.$tcrsid.'.description'}.
312: '<br />'.&mt('DocID').': '.$token.
313: '<br />'.&mt('Time').': '.&Apache::lonlocal::locallocaltime().'<hr />';
314: } else {
315: return $token;
316: }
317: }
318:
319: sub printalltags {
320: my $temp;
321: foreach $temp (sort keys %Apache::lonxml::alltags) {
322: &Apache::lonxml::debug("$temp -- ".
323: join(',',@{ $Apache::lonxml::alltags{$temp} }));
324: }
325: }
326:
327: sub xmlparse {
328: my ($request,$target,$content_file_string,$safeinit,%style_for_target) = @_;
329:
330: &setup_globals($request,$target);
331: &Apache::inputtags::initialize_inputtags();
332: &Apache::bridgetask::initialize_bridgetask();
333: &Apache::outputtags::initialize_outputtags();
334: &Apache::edit::initialize_edit();
335: &Apache::londefdef::initialize_londefdef();
336:
337: #
338: # do we have a course style file?
339: #
340:
341: if ($env{'request.course.id'} && $env{'request.state'} ne 'construct') {
342: my $bodytext=
343: $env{'course.'.$env{'request.course.id'}.'.default_xml_style'};
344: if ($bodytext) {
345: foreach my $file (split(',',$bodytext)) {
346: my $location=&Apache::lonnet::filelocation('',$file);
347: my $styletext=&Apache::lonnet::getfile($location);
348: if ($styletext ne '-1') {
349: %style_for_target = (%style_for_target,
350: &Apache::style::styleparser($target,$styletext));
351: }
352: }
353: }
354: } elsif ($env{'construct.style'}
355: && ($env{'request.state'} eq 'construct')) {
356: my $location=&Apache::lonnet::filelocation('',$env{'construct.style'});
357: my $styletext=&Apache::lonnet::getfile($location);
358: if ($styletext ne '-1') {
359: %style_for_target = (%style_for_target,
360: &Apache::style::styleparser($target,$styletext));
361: }
362: }
363: #&printalltags();
364: my @pars = ();
365: my $pwd=$env{'request.filename'};
366: $pwd =~ s:/[^/]*$::;
367: &newparser(\@pars,\$content_file_string,$pwd);
368:
369: my $safeeval = new Safe;
370: my $safehole = new Safe::Hole;
371: &init_safespace($target,$safeeval,$safehole,$safeinit);
372: #-------------------- Redefinition of the target in the case of compound target
373:
374: ($target, my @tenta) = split('&&',$target);
375:
376: my @stack = ();
377: my @parstack = ();
378: &initdepth();
379: &init_alarm();
380: my $finaloutput = &inner_xmlparse($target,\@stack,\@parstack,\@pars,
381: $safeeval,\%style_for_target,1);
382:
383: if (@stack) {
384: &warning(&mt('At end of file some tags were still left unclosed:').
385: ' <tt><'.join('></tt>, <tt><',reverse(@stack)).
386: '></tt>');
387: }
388: if ($env{'request.uri'}) {
389: &writeallows($env{'request.uri'});
390: }
391: &do_registered_ssi();
392: if ($Apache::lonxml::counter_changed) { &store_counter() }
393:
394: &clean_safespace($safeeval);
395:
396: if (@script_var_displays) {
397: $finaloutput .= join('',@script_var_displays);
398: undef(@script_var_displays);
399: }
400: &init_state();
401: if ($env{'form.return_only_error_and_warning_counts'}) {
402: if ($env{'request.filename'}=~/\.(html|htm|xml)$/i) {
403: my $error=&verify_html($content_file_string);
404: if ($error) { $errorcount++; }
405: }
406: return "$errorcount:$warningcount";
407: }
408: return $finaloutput;
409: }
410:
411: sub latex_special_symbols {
412: my ($string,$where)=@_;
413: #
414: # If e.g. in verbatim mode, then don't substitute.
415: # but return original string.
416: #
417: if (!($Apache::lonxml::substitute_LaTeX_symbols)) {
418: return $string;
419: }
420: if ($where eq 'header') {
421: $string =~ s/\\/\$\\backslash\$/g; # \ -> $\backslash$ per LaTex line by line pg 10.
422: $string =~ s/(\$|%|\{|\})/\\$1/g;
423: $string=&Apache::lonprintout::character_chart($string);
424: # any & or # leftover should be safe to just escape
425: $string=~s/([^\\])\&/$1\\\&/g;
426: $string=~s/([^\\])\#/$1\\\#/g;
427: $string =~ s/_/\\_/g; # _ -> \_
428: $string =~ s/\^/\\\^{}/g; # ^ -> \^{}
429: } else {
430: $string=~s/\\/\\ensuremath{\\backslash}/g;
431: $string=~s/\\\%|\%/\\\%/g;
432: $string=~s/\\{|{/\\{/g;
433: $string=~s/\\}|}/\\}/g;
434: $string=~s/\\ensuremath\\{\\backslash\\}/\\ensuremath{\\backslash}/g;
435: $string=~s/\\\$|\$/\\\$/g;
436: $string=~s/\\\_|\_/\\\_/g;
437: $string=~s/([^\\]|^)(\~|\^)/$1\\$2\\strut /g;
438: $string=~s/(>|<)/\\ensuremath\{$1\}/g; #more or less
439: $string=&Apache::lonprintout::character_chart($string);
440: # any & or # leftover should be safe to just escape
441: $string=~s/\\\&|\&/\\\&/g;
442: $string=~s/\\\#|\#/\\\#/g;
443: $string=~s/\|/\$\\mid\$/g;
444: #single { or } How to escape?
445: }
446: return $string;
447: }
448:
449: sub inner_xmlparse {
450: my ($target,$stack,$parstack,$pars,$safeeval,$style_for_target,$start)=@_;
451: my $finaloutput = '';
452: my $result;
453: my $token;
454: my $dontpop=0;
455: my $startredirection = $Apache::lonxml::redirection;
456: while ( $#$pars > -1 ) {
457: while ($token = $$pars['-1']->get_token) {
458: if (($token->[0] eq 'T') || ($token->[0] eq 'C') ) {
459: if ($metamode<1) {
460: my $text=$token->[1];
461: if ($token->[0] eq 'C' && $target eq 'tex') {
462: $text = '';
463: # $text = '%'.$text."\n";
464: }
465: $result.=$text;
466: }
467: } elsif (($token->[0] eq 'D')) {
468: if ($metamode<1 && $target eq 'web') {
469: my $text=$token->[1];
470: $result.=$text;
471: }
472: } elsif ($token->[0] eq 'PI') {
473: if ($metamode<1 && $target eq 'web') {
474: $result=$token->[2];
475: }
476: } elsif ($token->[0] eq 'S') {
477: # add tag to stack
478: push (@$stack,$token->[1]);
479: # add parameters list to another stack
480: push (@$parstack,&parstring($token));
481: &increasedepth($token);
482: if ($Apache::lonxml::usestyle &&
483: exists($$style_for_target{$token->[1]})) {
484: $Apache::lonxml::usestyle=0;
485: my $string=$$style_for_target{$token->[1]}.
486: '<LONCAPA_INTERNAL_TURN_STYLE_ON />';
487: &Apache::lonxml::newparser($pars,\$string);
488: $Apache::lonxml::style_values=$$parstack[-1];
489: $Apache::lonxml::style_end_values=$$parstack[-1];
490: } else {
491: $result = &callsub("start_$token->[1]", $target, $token, $stack,
492: $parstack, $pars, $safeeval, $style_for_target);
493: }
494: } elsif ($token->[0] eq 'E') {
495: if ($Apache::lonxml::usestyle &&
496: exists($$style_for_target{'/'."$token->[1]"})) {
497: $Apache::lonxml::usestyle=0;
498: my $string=$$style_for_target{'/'.$token->[1]}.
499: '<LONCAPA_INTERNAL_TURN_STYLE_ON end="'.$token->[1].'" />';
500: &Apache::lonxml::newparser($pars,\$string);
501: $Apache::lonxml::style_values=$Apache::lonxml::style_end_values;
502: $Apache::lonxml::style_end_values='';
503: $dontpop=1;
504: } else {
505: #clear out any tags that didn't end
506: while ($token->[1] ne $$stack['-1'] && ($#$stack > -1)) {
507: my $lasttag=$$stack[-1];
508: if ($token->[1] =~ /^\Q$lasttag\E$/i) {
509: &Apache::lonxml::warning(&mt('Using tag [_1] on line [_2] as end tag to [_3]','</'.$token->[1].'>','.$token->[3].','<'.$$stack[-1].'>'));
510: last;
511: } else {
512: &Apache::lonxml::warning(&mt('Found tag [_1] on line [_2] when looking for [_3] in file.','</'.$token->[1].'>',$token->[3],'</'.$$stack[-1].'>'));
513: &end_tag($stack,$parstack,$token);
514: }
515: }
516: $result = &callsub("end_$token->[1]", $target, $token, $stack,
517: $parstack, $pars,$safeeval, $style_for_target);
518: }
519: } else {
520: &Apache::lonxml::error("Unknown token event :$token->[0]:$token->[1]:");
521: }
522: #evaluate variable refs in result
523: if ($Apache::lonxml::post_evaluate &&$result ne "") {
524: my $extras;
525: if (!$Apache::lonxml::usestyle) {
526: $extras=$Apache::lonxml::style_values;
527: }
528: if ( $#$parstack > -1 ) {
529: $result=&Apache::run::evaluate($result,$safeeval,$extras.$$parstack[-1]);
530: } else {
531: $result= &Apache::run::evaluate($result,$safeeval,$extras);
532: }
533: }
534: $Apache::lonxml::post_evaluate=1;
535:
536: if (($token->[0] eq 'T') || ($token->[0] eq 'C') || ($token->[0] eq 'D') ) {
537: #Style file definitions should be correct
538: if ($target eq 'tex' && ($Apache::lonxml::usestyle)) {
539: $result=&latex_special_symbols($result);
540: }
541: }
542:
543: if ($Apache::lonxml::redirection) {
544: $Apache::lonxml::outputstack['-1'] .= $result;
545: } else {
546: $finaloutput.=$result;
547: }
548: $result = '';
549:
550: if ($token->[0] eq 'E' && !$dontpop) {
551: &end_tag($stack,$parstack,$token);
552: }
553: $dontpop=0;
554: }
555: if ($#$pars > -1) {
556: pop @$pars;
557: pop @Apache::lonxml::pwd;
558: }
559: }
560:
561: # if ($target eq 'meta') {
562: # $finaloutput.=&endredirection;
563: # }
564:
565: if ( $start && $target eq 'grade') { &endredirection(); }
566: if ( $Apache::lonxml::redirection > $startredirection) {
567: while ($Apache::lonxml::redirection > $startredirection) {
568: $finaloutput .= &endredirection();
569: }
570: }
571: if (($ENV{'QUERY_STRING'}) && ($target eq 'web')) {
572: $finaloutput=&afterburn($finaloutput);
573: }
574: return $finaloutput;
575: }
576:
577: ##
578: ## Looks to see if there is a subroutine defined for this tag. If so, call it,
579: ## otherwise do not call it as we do not know what it is.
580: ##
581: sub callsub {
582: my ($sub,$target,$token,$tagstack,$parstack,$parser,$safeeval,$style)=@_;
583: my $currentstring='';
584: my $nodefault;
585: {
586: my $sub1;
587: no strict 'refs';
588: my $tag=$token->[1];
589: # get utterly rid of extended html tags
590: if ($tag=~/^x\-/i) { return ''; }
591: my $space=$Apache::lonxml::alltags{$tag}[-1];
592: if (!$space) {
593: $tag=~tr/A-Z/a-z/;
594: $sub=~tr/A-Z/a-z/;
595: $space=$Apache::lonxml::alltags{$tag}[-1]
596: }
597:
598: my $deleted=0;
599: if (($token->[0] eq 'S') && ($target eq 'modified')) {
600: $deleted=&Apache::edit::handle_delete($space,$target,$token,$tagstack,
601: $parstack,$parser,$safeeval,
602: $style);
603: }
604: if (!$deleted) {
605: if ($space) {
606: #&Apache::lonxml::debug("Calling sub $sub in $space $metamode");
607: $sub1="$space\:\:$sub";
608: ($currentstring,$nodefault) = &$sub1($target,$token,$tagstack,
609: $parstack,$parser,$safeeval,
610: $style);
611: } else {
612: if ($target eq 'tex') {
613: # throw away tag name
614: return '';
615: }
616: #&Apache::lonxml::debug("NOT Calling sub $sub in $space $metamode");
617: if ($metamode <1) {
618: if (defined($token->[4]) && ($metamode < 1)) {
619: $currentstring = $token->[4];
620: } else {
621: $currentstring = $token->[2];
622: }
623: }
624: }
625: # &Apache::lonxml::debug("nodefalt:$nodefault:");
626: if ($currentstring eq '' && $nodefault eq '') {
627: if ($target eq 'edit') {
628: #&Apache::lonxml::debug("doing default edit for $token->[1]");
629: if ($token->[0] eq 'S') {
630: $currentstring = &Apache::edit::tag_start($target,$token);
631: } elsif ($token->[0] eq 'E') {
632: $currentstring = &Apache::edit::tag_end($target,$token);
633: }
634: }
635: }
636: if ($target eq 'modified' && $nodefault eq '') {
637: if ($currentstring eq '') {
638: if ($token->[0] eq 'S') {
639: $currentstring = $token->[4];
640: } elsif ($token->[0] eq 'E') {
641: $currentstring = $token->[2];
642: } else {
643: $currentstring = $token->[2];
644: }
645: }
646: if ($token->[0] eq 'S') {
647: $currentstring.=&Apache::edit::handle_insert();
648: } elsif ($token->[0] eq 'E') {
649: $currentstring.=&Apache::edit::handle_insertafter($token->[1]);
650: }
651: }
652: }
653: use strict 'refs';
654: }
655: return $currentstring;
656: }
657:
658: {
659: my %state;
660:
661: sub init_state {
662: undef(%state);
663: }
664:
665: sub set_state {
666: my ($key,$value) = @_;
667: $state{$key} = $value;
668: return $value;
669: }
670: sub get_state {
671: my ($key) = @_;
672: return $state{$key};
673: }
674: }
675:
676: sub setup_globals {
677: my ($request,$target)=@_;
678: $Apache::lonxml::request=$request;
679: $errorcount=0;
680: $warningcount=0;
681: $Apache::lonxml::internal_error=0;
682: $Apache::lonxml::default_homework_loaded=0;
683: $Apache::lonxml::usestyle=1;
684: &init_counter();
685: &clear_bubble_lines_for_part();
686: &init_state();
687: &set_state('target',$target);
688: @Apache::lonxml::pwd=();
689: @Apache::lonxml::extlinks=();
690: @script_var_displays=();
691: @Apache::lonxml::ssi_info=();
692: $Apache::lonxml::post_evaluate=1;
693: $Apache::lonxml::warnings_error_header='';
694: $Apache::lonxml::substitute_LaTeX_symbols = 1;
695: if ($target eq 'meta') {
696: $Apache::lonxml::redirection = 0;
697: $Apache::lonxml::metamode = 1;
698: $Apache::lonxml::evaluate = 1;
699: $Apache::lonxml::import = 0;
700: } elsif ($target eq 'answer') {
701: $Apache::lonxml::redirection = 0;
702: $Apache::lonxml::metamode = 1;
703: $Apache::lonxml::evaluate = 1;
704: $Apache::lonxml::import = 1;
705: } elsif ($target eq 'grade') {
706: &startredirection(); #ended in inner_xmlparse on exit
707: $Apache::lonxml::metamode = 0;
708: $Apache::lonxml::evaluate = 1;
709: $Apache::lonxml::import = 1;
710: } elsif ($target eq 'modified') {
711: $Apache::lonxml::redirection = 0;
712: $Apache::lonxml::metamode = 0;
713: $Apache::lonxml::evaluate = 0;
714: $Apache::lonxml::import = 0;
715: } elsif ($target eq 'edit') {
716: $Apache::lonxml::redirection = 0;
717: $Apache::lonxml::metamode = 0;
718: $Apache::lonxml::evaluate = 0;
719: $Apache::lonxml::import = 0;
720: } elsif ($target eq 'analyze') {
721: $Apache::lonxml::redirection = 0;
722: $Apache::lonxml::metamode = 0;
723: $Apache::lonxml::evaluate = 1;
724: $Apache::lonxml::import = 1;
725: } else {
726: $Apache::lonxml::redirection = 0;
727: $Apache::lonxml::metamode = 0;
728: $Apache::lonxml::evaluate = 1;
729: $Apache::lonxml::import = 1;
730: }
731: }
732:
733: sub init_safespace {
734: my ($target,$safeeval,$safehole,$safeinit) = @_;
735: $safeeval->deny_only(':dangerous');
736: $safeeval->reval('use Math::Complex;');
737: $safeeval->permit_only(":default");
738: $safeeval->permit("entereval");
739: $safeeval->permit(":base_math");
740: $safeeval->permit("sort");
741: $safeeval->permit("time");
742: $safeeval->permit("caller");
743: $safeeval->deny("rand");
744: $safeeval->deny("srand");
745: $safeeval->deny(":base_io");
746: $safehole->wrap(\&Apache::scripttag::xmlparse,$safeeval,'&xmlparse');
747: $safehole->wrap(\&Apache::outputtags::multipart,$safeeval,'&multipart');
748: $safehole->wrap(\&Apache::lonnet::EXT,$safeeval,'&EXT');
749: $safehole->wrap(\&Apache::chemresponse::chem_standard_order,$safeeval,
750: '&chem_standard_order');
751: $safehole->wrap(\&Apache::response::check_status,$safeeval,'&check_status');
752: $safehole->wrap(\&Apache::response::implicit_multiplication,$safeeval,'&implicit_multiplication');
753:
754: $safehole->wrap(\&Apache::lonmaxima::maxima_eval,$safeeval,'&maxima_eval');
755: $safehole->wrap(\&Apache::lonmaxima::maxima_check,$safeeval,'&maxima_check');
756: $safehole->wrap(\&Apache::lonmaxima::maxima_cas_formula_fix,$safeeval,
757: '&maxima_cas_formula_fix');
758:
759: $safehole->wrap(\&Apache::lonr::r_eval,$safeeval,'&r_eval');
760: $safehole->wrap(\&Apache::lonr::r_check,$safeeval,'&r_check');
761: $safehole->wrap(\&Apache::lonr::r_cas_formula_fix,$safeeval,
762: '&r_cas_formula_fix');
763:
764: $safehole->wrap(\&Apache::caparesponse::capa_formula_fix,$safeeval,
765: '&capa_formula_fix');
766:
767: $safehole->wrap(\&Apache::lonlocal::locallocaltime,$safeeval,
768: '&locallocaltime');
769:
770: $safehole->wrap(\&Math::Cephes::asin,$safeeval,'&asin');
771: $safehole->wrap(\&Math::Cephes::acos,$safeeval,'&acos');
772: $safehole->wrap(\&Math::Cephes::atan,$safeeval,'&atan');
773: $safehole->wrap(\&Math::Cephes::sinh,$safeeval,'&sinh');
774: $safehole->wrap(\&Math::Cephes::cosh,$safeeval,'&cosh');
775: $safehole->wrap(\&Math::Cephes::tanh,$safeeval,'&tanh');
776: $safehole->wrap(\&Math::Cephes::asinh,$safeeval,'&asinh');
777: $safehole->wrap(\&Math::Cephes::acosh,$safeeval,'&acosh');
778: $safehole->wrap(\&Math::Cephes::atanh,$safeeval,'&atanh');
779: $safehole->wrap(\&Math::Cephes::erf,$safeeval,'&erf');
780: $safehole->wrap(\&Math::Cephes::erfc,$safeeval,'&erfc');
781: $safehole->wrap(\&Math::Cephes::j0,$safeeval,'&j0');
782: $safehole->wrap(\&Math::Cephes::j1,$safeeval,'&j1');
783: $safehole->wrap(\&Math::Cephes::jn,$safeeval,'&jn');
784: $safehole->wrap(\&Math::Cephes::jv,$safeeval,'&jv');
785: $safehole->wrap(\&Math::Cephes::y0,$safeeval,'&y0');
786: $safehole->wrap(\&Math::Cephes::y1,$safeeval,'&y1');
787: $safehole->wrap(\&Math::Cephes::yn,$safeeval,'&yn');
788: $safehole->wrap(\&Math::Cephes::yv,$safeeval,'&yv');
789:
790: $safehole->wrap(\&Math::Cephes::bdtr ,$safeeval,'&bdtr' );
791: $safehole->wrap(\&Math::Cephes::bdtrc ,$safeeval,'&bdtrc' );
792: $safehole->wrap(\&Math::Cephes::bdtri ,$safeeval,'&bdtri' );
793: $safehole->wrap(\&Math::Cephes::btdtr ,$safeeval,'&btdtr' );
794: $safehole->wrap(\&Math::Cephes::chdtr ,$safeeval,'&chdtr' );
795: $safehole->wrap(\&Math::Cephes::chdtrc,$safeeval,'&chdtrc');
796: $safehole->wrap(\&Math::Cephes::chdtri,$safeeval,'&chdtri');
797: $safehole->wrap(\&Math::Cephes::fdtr ,$safeeval,'&fdtr' );
798: $safehole->wrap(\&Math::Cephes::fdtrc ,$safeeval,'&fdtrc' );
799: $safehole->wrap(\&Math::Cephes::fdtri ,$safeeval,'&fdtri' );
800: $safehole->wrap(\&Math::Cephes::gdtr ,$safeeval,'&gdtr' );
801: $safehole->wrap(\&Math::Cephes::gdtrc ,$safeeval,'&gdtrc' );
802: $safehole->wrap(\&Math::Cephes::nbdtr ,$safeeval,'&nbdtr' );
803: $safehole->wrap(\&Math::Cephes::nbdtrc,$safeeval,'&nbdtrc');
804: $safehole->wrap(\&Math::Cephes::nbdtri,$safeeval,'&nbdtri');
805: $safehole->wrap(\&Math::Cephes::ndtr ,$safeeval,'&ndtr' );
806: $safehole->wrap(\&Math::Cephes::ndtri ,$safeeval,'&ndtri' );
807: $safehole->wrap(\&Math::Cephes::pdtr ,$safeeval,'&pdtr' );
808: $safehole->wrap(\&Math::Cephes::pdtrc ,$safeeval,'&pdtrc' );
809: $safehole->wrap(\&Math::Cephes::pdtri ,$safeeval,'&pdtri' );
810: $safehole->wrap(\&Math::Cephes::stdtr ,$safeeval,'&stdtr' );
811: $safehole->wrap(\&Math::Cephes::stdtri,$safeeval,'&stdtri');
812:
813: $safehole->wrap(\&Math::Cephes::Matrix::mat,$safeeval,'&mat');
814: $safehole->wrap(\&Math::Cephes::Matrix::new,$safeeval,
815: '&Math::Cephes::Matrix::new');
816: $safehole->wrap(\&Math::Cephes::Matrix::coef,$safeeval,
817: '&Math::Cephes::Matrix::coef');
818: $safehole->wrap(\&Math::Cephes::Matrix::clr,$safeeval,
819: '&Math::Cephes::Matrix::clr');
820: $safehole->wrap(\&Math::Cephes::Matrix::add,$safeeval,
821: '&Math::Cephes::Matrix::add');
822: $safehole->wrap(\&Math::Cephes::Matrix::sub,$safeeval,
823: '&Math::Cephes::Matrix::sub');
824: $safehole->wrap(\&Math::Cephes::Matrix::mul,$safeeval,
825: '&Math::Cephes::Matrix::mul');
826: $safehole->wrap(\&Math::Cephes::Matrix::div,$safeeval,
827: '&Math::Cephes::Matrix::div');
828: $safehole->wrap(\&Math::Cephes::Matrix::inv,$safeeval,
829: '&Math::Cephes::Matrix::inv');
830: $safehole->wrap(\&Math::Cephes::Matrix::transp,$safeeval,
831: '&Math::Cephes::Matrix::transp');
832: $safehole->wrap(\&Math::Cephes::Matrix::simq,$safeeval,
833: '&Math::Cephes::Matrix::simq');
834: $safehole->wrap(\&Math::Cephes::Matrix::mat_to_vec,$safeeval,
835: '&Math::Cephes::Matrix::mat_to_vec');
836: $safehole->wrap(\&Math::Cephes::Matrix::vec_to_mat,$safeeval,
837: '&Math::Cephes::Matrix::vec_to_mat');
838: $safehole->wrap(\&Math::Cephes::Matrix::check,$safeeval,
839: '&Math::Cephes::Matrix::check');
840: $safehole->wrap(\&Math::Cephes::Matrix::check,$safeeval,
841: '&Math::Cephes::Matrix::check');
842:
843: # $safehole->wrap(\&Math::Cephes::new_fract,$safeeval,'&new_fract');
844: # $safehole->wrap(\&Math::Cephes::radd,$safeeval,'&radd');
845: # $safehole->wrap(\&Math::Cephes::rsub,$safeeval,'&rsub');
846: # $safehole->wrap(\&Math::Cephes::rmul,$safeeval,'&rmul');
847: # $safehole->wrap(\&Math::Cephes::rdiv,$safeeval,'&rdiv');
848: # $safehole->wrap(\&Math::Cephes::euclid,$safeeval,'&euclid');
849:
850: $safehole->wrap(\&Math::Random::random_beta,$safeeval,'&math_random_beta');
851: $safehole->wrap(\&Math::Random::random_chi_square,$safeeval,'&math_random_chi_square');
852: $safehole->wrap(\&Math::Random::random_exponential,$safeeval,'&math_random_exponential');
853: $safehole->wrap(\&Math::Random::random_f,$safeeval,'&math_random_f');
854: $safehole->wrap(\&Math::Random::random_gamma,$safeeval,'&math_random_gamma');
855: $safehole->wrap(\&Math::Random::random_multivariate_normal,$safeeval,'&math_random_multivariate_normal');
856: $safehole->wrap(\&Math::Random::random_multinomial,$safeeval,'&math_random_multinomial');
857: $safehole->wrap(\&Math::Random::random_noncentral_chi_square,$safeeval,'&math_random_noncentral_chi_square');
858: $safehole->wrap(\&Math::Random::random_noncentral_f,$safeeval,'&math_random_noncentral_f');
859: $safehole->wrap(\&Math::Random::random_normal,$safeeval,'&math_random_normal');
860: $safehole->wrap(\&Math::Random::random_permutation,$safeeval,'&math_random_permutation');
861: $safehole->wrap(\&Math::Random::random_permuted_index,$safeeval,'&math_random_permuted_index');
862: $safehole->wrap(\&Math::Random::random_uniform,$safeeval,'&math_random_uniform');
863: $safehole->wrap(\&Math::Random::random_poisson,$safeeval,'&math_random_poisson');
864: $safehole->wrap(\&Math::Random::random_uniform_integer,$safeeval,'&math_random_uniform_integer');
865: $safehole->wrap(\&Math::Random::random_negative_binomial,$safeeval,'&math_random_negative_binomial');
866: $safehole->wrap(\&Math::Random::random_binomial,$safeeval,'&math_random_binomial');
867: $safehole->wrap(\&Math::Random::random_seed_from_phrase,$safeeval,'&random_seed_from_phrase');
868: $safehole->wrap(\&Math::Random::random_set_seed_from_phrase,$safeeval,'&random_set_seed_from_phrase');
869: $safehole->wrap(\&Math::Random::random_get_seed,$safeeval,'&random_get_seed');
870: $safehole->wrap(\&Math::Random::random_set_seed,$safeeval,'&random_set_seed');
871: $safehole->wrap(\&Apache::loncommon::languages,$safeeval,'&languages');
872: $safehole->wrap(\&Apache::lonxml::error,$safeeval,'&LONCAPA_INTERNAL_ERROR');
873: $safehole->wrap(\&Apache::lonxml::debug,$safeeval,'&LONCAPA_INTERNAL_DEBUG');
874: $safehole->wrap(\&Apache::lonnet::logthis,$safeeval,'&LONCAPA_INTERNAL_LOGTHIS');
875: $safehole->wrap(\&Apache::inputtags::finalizeawards,$safeeval,'&LONCAPA_INTERNAL_FINALIZEAWARDS');
876: $safehole->wrap(\&Apache::caparesponse::get_sigrange,$safeeval,'&LONCAPA_INTERNAL_get_sigrange');
877: # use Data::Dumper;
878: # $safehole->wrap(\&Data::Dumper::Dumper,$safeeval,'&LONCAPA_INTERNAL_Dumper');
879: #need to inspect this class of ops
880: # $safeeval->deny(":base_orig");
881: $safeeval->permit("require");
882: $safeinit .= ';$external::target="'.$target.'";';
883: &Apache::run::run($safeinit,$safeeval);
884: &initialize_rndseed($safeeval);
885: }
886:
887: sub clean_safespace {
888: my ($safeeval) = @_;
889: delete_package_recurse($safeeval->{Root});
890: }
891:
892: sub delete_package_recurse {
893: my ($package) = @_;
894: my @subp;
895: {
896: no strict 'refs';
897: while (my ($key,$val) = each(%{*{"$package\::"}})) {
898: if (!defined($val)) { next; }
899: local (*ENTRY) = $val;
900: if (defined *ENTRY{HASH} && $key =~ /::$/ &&
901: $key ne "main::" && $key ne "<none>::")
902: {
903: my ($p) = $package ne "main" ? "$package\::" : "";
904: ($p .= $key) =~ s/::$//;
905: push(@subp,$p);
906: }
907: }
908: }
909: foreach my $p (@subp) {
910: delete_package_recurse($p);
911: }
912: Symbol::delete_package($package);
913: }
914:
915: sub initialize_rndseed {
916: my ($safeeval)=@_;
917: my $rndseed;
918: my ($symb,$courseid,$domain,$name) = &Apache::lonnet::whichuser();
919: $rndseed=&Apache::lonnet::rndseed($symb,$courseid,$domain,$name);
920: my $safeinit = '$external::randomseed="'.$rndseed.'";';
921: &Apache::lonxml::debug("Setting rndseed to $rndseed");
922: &Apache::run::run($safeinit,$safeeval);
923: }
924:
925: sub default_homework_load {
926: my ($safeeval)=@_;
927: &Apache::lonxml::debug('Loading default_homework');
928: my $default=&Apache::lonnet::getfile('/home/httpd/html/res/adm/includes/default_homework.lcpm');
929: if ($default eq -1) {
930: &Apache::lonxml::error("<b>Unable to find <i>default_homework.lcpm</i></b>");
931: } else {
932: &Apache::run::run($default,$safeeval);
933: $Apache::lonxml::default_homework_loaded=1;
934: }
935: }
936:
937: {
938: my $alarm_depth;
939: sub init_alarm {
940: alarm(0);
941: $alarm_depth=0;
942: }
943:
944: sub start_alarm {
945: if ($alarm_depth<1) {
946: my $old=alarm($Apache::lonnet::perlvar{'lonScriptTimeout'});
947: if ($old) {
948: &Apache::lonxml::error("Cancelled an alarm of $old, this shouldn't occur.");
949: }
950: }
951: $alarm_depth++;
952: }
953:
954: sub end_alarm {
955: $alarm_depth--;
956: if ($alarm_depth<1) { alarm(0); }
957: }
958: }
959: my $metamode_was;
960: sub startredirection {
961: if (!$Apache::lonxml::redirection) {
962: $metamode_was=$Apache::lonxml::metamode;
963: }
964: $Apache::lonxml::metamode=0;
965: $Apache::lonxml::redirection++;
966: push (@Apache::lonxml::outputstack, '');
967: }
968:
969: sub endredirection {
970: if (!$Apache::lonxml::redirection) {
971: &Apache::lonxml::error("Endredirection was called before a startredirection, perhaps you have unbalanced tags. Some debugging information:".join ":",caller);
972: return '';
973: }
974: $Apache::lonxml::redirection--;
975: if (!$Apache::lonxml::redirection) {
976: $Apache::lonxml::metamode=$metamode_was;
977: }
978: pop @Apache::lonxml::outputstack;
979: }
980: sub in_redirection {
981: return ($Apache::lonxml::redirection > 0)
982: }
983:
984: sub end_tag {
985: my ($tagstack,$parstack,$token)=@_;
986: pop(@$tagstack);
987: pop(@$parstack);
988: &decreasedepth($token);
989: }
990:
991: sub initdepth {
992: @Apache::lonxml::depthcounter=();
993: undef($Apache::lonxml::last_depth_count);
994: }
995:
996:
997: my @timers;
998: my $lasttime;
999: # @Apache::lonxml::depthcounter -> count of tags that exist so
1000: # far at each level
1001: # $Apache::lonxml::last_depth_count -> when ascending, need to
1002: # remember the count for the level below the current level (for
1003: # example going from 1_2 -> 1 -> 1_3 need to remember the 2 )
1004:
1005: sub increasedepth {
1006: my ($token) = @_;
1007: push(@Apache::lonxml::depthcounter,$Apache::lonxml::last_depth_count+1);
1008: undef($Apache::lonxml::last_depth_count);
1009: my $time;
1010: if ($Apache::lonxml::debug eq "1") {
1011: push(@timers,[&gettimeofday()]);
1012: $time=&tv_interval($lasttime);
1013: $lasttime=[&gettimeofday()];
1014: }
1015: my $spacing=' 'x($#Apache::lonxml::depthcounter);
1016: $Apache::lonxml::curdepth=join('_',@Apache::lonxml::depthcounter);
1017: # &Apache::lonxml::debug("s$spacing$Apache::lonxml::depth : $Apache::lonxml::olddepth : $Apache::lonxml::curdepth : $token->[1] : $time");
1018: #print "<br />s $Apache::lonxml::depth : $Apache::lonxml::olddepth : $curdepth : $token->[1]\n";
1019: }
1020:
1021: sub decreasedepth {
1022: my ($token) = @_;
1023: if ( $#Apache::lonxml::depthcounter == -1) {
1024: &Apache::lonxml::warning(&mt("Missing tags, unable to properly run file."));
1025: }
1026: $Apache::lonxml::last_depth_count = pop(@Apache::lonxml::depthcounter);
1027:
1028: my ($timer,$time);
1029: if ($Apache::lonxml::debug eq "1") {
1030: $timer=pop(@timers);
1031: $time=&tv_interval($lasttime);
1032: $lasttime=[&gettimeofday()];
1033: }
1034: my $spacing=' 'x($#Apache::lonxml::depthcounter);
1035: $Apache::lonxml::curdepth = join('_',@Apache::lonxml::depthcounter);
1036: # &Apache::lonxml::debug("e$spacing$Apache::lonxml::depth : $Apache::lonxml::olddepth : $Apache::lonxml::curdepth : $token->[1] : $time : ".&tv_interval($timer));
1037: #print "<br />e $Apache::lonxml::depth : $Apache::lonxml::olddepth : $token->[1] : $curdepth\n";
1038: }
1039:
1040: sub get_id {
1041: my ($parstack,$safeeval)=@_;
1042: my $id= &Apache::lonxml::get_param('id',$parstack,$safeeval);
1043: if ($env{'request.state'} eq 'construct' && $id =~ /([._]|[^\w\d\s[:punct:]])/) {
1044: &error(&mt("ID "[_1]" contains invalid characters, IDs are only allowed to contain letters, numbers, spaces and -",'<tt>'.$id.'</tt>'));
1045: }
1046: if ($id =~ /^\s*$/) { $id = $Apache::lonxml::curdepth; }
1047: return $id;
1048: }
1049:
1050: sub get_all_text_unbalanced {
1051: #there is a copy of this in lonpublisher.pm
1052: my($tag,$pars)= @_;
1053: my $token;
1054: my $result='';
1055: $tag='<'.$tag.'>';
1056: while ($token = $$pars[-1]->get_token) {
1057: if (($token->[0] eq 'T')||($token->[0] eq 'C')||($token->[0] eq 'D')) {
1058: if ($token->[0] eq 'T' && $token->[2]) {
1059: $result.='<![CDATA['.$token->[1].']]>';
1060: } else {
1061: $result.=$token->[1];
1062: }
1063: } elsif ($token->[0] eq 'PI') {
1064: $result.=$token->[2];
1065: } elsif ($token->[0] eq 'S') {
1066: $result.=$token->[4];
1067: } elsif ($token->[0] eq 'E') {
1068: $result.=$token->[2];
1069: }
1070: if ($result =~ /\Q$tag\E/is) {
1071: ($result,my $redo)=$result =~ /(.*)\Q$tag\E(.*)/is;
1072: #&Apache::lonxml::debug('Got a winner with leftovers ::'.$2);
1073: #&Apache::lonxml::debug('Result is :'.$1);
1074: $redo=$tag.$redo;
1075: &Apache::lonxml::newparser($pars,\$redo);
1076: last;
1077: }
1078: }
1079: return $result
1080:
1081: }
1082:
1083: #########################################################################
1084: # #
1085: # bubble line counter management #
1086: # #
1087: #########################################################################
1088:
1089: =pod
1090:
1091: For bubble grading mode and exam bubble printing mode, the tracking of
1092: the current 'bubble line number' is stored in the %env element
1093: 'form.counter', and is modifed and handled by the following routines.
1094:
1095: The value of it is stored in $Apache:lonxml::counter when live and
1096: stored back to env after done.
1097:
1098: =item &increment_counter($increment);
1099:
1100: Increments the internal counter environment variable a specified amount
1101:
1102: Optional Arguments:
1103: $increment - amount to increment by (defaults to 1)
1104: Also 1 if the value is negative or zero.
1105: $part_response - A concatenation of the part and response id
1106: identifying exactly what is being 'answered'.
1107:
1108:
1109: =cut
1110:
1111: sub increment_counter {
1112: my ($increment, $part_response) = @_;
1113: if ($env{'form.grade_noincrement'}) { return; }
1114: if (!defined($increment) || $increment le 0) {
1115: $increment = 1;
1116: }
1117: $Apache::lonxml::counter += $increment;
1118:
1119: # If the caller supplied the response_id parameter,
1120: # Maintain its counter.. creating if necessary.
1121:
1122: if (defined($part_response)) {
1123: if (!defined($Apache::lonxml::counters_per_part{$part_response})) {
1124: $Apache::lonxml::counters_per_part{$part_response} = 0;
1125: }
1126: $Apache::lonxml::counters_per_part{$part_response} += $increment;
1127: my $new_value = $Apache::lonxml::counters_per_part{$part_response};
1128: }
1129:
1130: $Apache::lonxml::counter_changed=1;
1131: }
1132:
1133: =pod
1134:
1135: =item &init_counter($increment);
1136:
1137: Initialize the internal counter environment variable
1138:
1139: =cut
1140:
1141: sub init_counter {
1142: if ($env{'request.state'} eq 'construct') {
1143: $Apache::lonxml::counter=1;
1144: $Apache::lonxml::counter_changed=1;
1145: } elsif (defined($env{'form.counter'})) {
1146: $Apache::lonxml::counter=$env{'form.counter'};
1147: $Apache::lonxml::counter_changed=0;
1148: } else {
1149: $Apache::lonxml::counter=1;
1150: $Apache::lonxml::counter_changed=1;
1151: }
1152: }
1153:
1154: sub store_counter {
1155: &Apache::lonnet::appenv({'form.counter' => $Apache::lonxml::counter});
1156: $Apache::lonxml::counter_changed=0;
1157: return '';
1158: }
1159:
1160: {
1161: my $state;
1162: sub clear_problem_counter {
1163: undef($state);
1164: &Apache::lonnet::delenv('form.counter');
1165: &Apache::lonxml::init_counter();
1166: &Apache::lonxml::store_counter();
1167: }
1168:
1169: sub remember_problem_counter {
1170: &Apache::lonnet::transfer_profile_to_env(undef,undef,1);
1171: $state = $env{'form.counter'};
1172: }
1173:
1174: sub restore_problem_counter {
1175: if (defined($state)) {
1176: &Apache::lonnet::appenv({'form.counter' => $state});
1177: }
1178: }
1179: sub get_problem_counter {
1180: if ($Apache::lonxml::counter_changed) { &store_counter() }
1181: &Apache::lonnet::transfer_profile_to_env(undef,undef,1);
1182: return $env{'form.counter'};
1183: }
1184: }
1185:
1186: =pod
1187:
1188: =item bubble_lines_for_part(part_response)
1189:
1190: Returns the number of lines required to get a response for
1191: $part_response (this is just $Apache::lonxml::counters_per_part{$part_response}
1192:
1193: =cut
1194:
1195: sub bubble_lines_for_part {
1196: my ($part_response) = @_;
1197:
1198: if (!defined($Apache::lonxml::counters_per_part{$part_response})) {
1199: return 0;
1200: } else {
1201: return $Apache::lonxml::counters_per_part{$part_response};
1202: }
1203: }
1204:
1205: =pod
1206:
1207: =item clear_bubble_lines_for_part
1208:
1209: Clears the hash of bubble lines per part. If a caller
1210: needs to analyze several resources this should be called between
1211: resources to reset the hash for each problem being analyzed.
1212:
1213: =cut
1214:
1215: sub clear_bubble_lines_for_part {
1216: undef(%Apache::lonxml::counters_per_part);
1217: }
1218:
1219: =pod
1220:
1221: =item set_bubble_lines(part_response, value)
1222:
1223: If there is a problem part, that for whatever reason
1224: requires bubble lines that are not
1225: the same as the counter increment, it can call this sub during
1226: analysis to set its hash value explicitly.
1227:
1228: =cut
1229:
1230: sub set_bubble_lines {
1231: my ($part_response, $value) = @_;
1232:
1233: $Apache::lonxml::counters_per_part{$part_response} = $value;
1234: }
1235:
1236: =pod
1237:
1238: =item get_bubble_line_hash
1239:
1240: Returns the current bubble line hash. This is assumed to
1241: be small so we return a copy
1242:
1243:
1244: =cut
1245:
1246: sub get_bubble_line_hash {
1247: return %Apache::lonxml::counters_per_part;
1248: }
1249:
1250:
1251: #--------------------------------------------------
1252:
1253: sub get_all_text {
1254: my($tag,$pars,$style)= @_;
1255: my $gotfullstack=1;
1256: if (ref($pars) ne 'ARRAY') {
1257: $gotfullstack=0;
1258: $pars=[$pars];
1259: }
1260: if (ref($style) ne 'HASH') {
1261: $style={};
1262: }
1263: my $depth=0;
1264: my $token;
1265: my $result='';
1266: if ( $tag =~ m:^/: ) {
1267: my $tag=substr($tag,1);
1268: #&Apache::lonxml::debug("have:$tag:");
1269: my $top_empty=0;
1270: while (($depth >=0) && ($#$pars > -1) && (!$top_empty)) {
1271: while (($depth >=0) && ($token = $$pars[-1]->get_token)) {
1272: #&Apache::lonxml::debug("e token:$token->[0]:$depth:$token->[1]:".$#$pars.":".$#Apache::lonxml::pwd);
1273: if (($token->[0] eq 'T')||($token->[0] eq 'C')||($token->[0] eq 'D')) {
1274: if ($token->[2]) {
1275: $result.='<![CDATA['.$token->[1].']]>';
1276: } else {
1277: $result.=$token->[1];
1278: }
1279: } elsif ($token->[0] eq 'PI') {
1280: $result.=$token->[2];
1281: } elsif ($token->[0] eq 'S') {
1282: if ($token->[1] =~ /^\Q$tag\E$/i) { $depth++; }
1283: if ($token->[1] =~ /^LONCAPA_INTERNAL_TURN_STYLE_ON$/) { $Apache::lonxml::usestyle=1; }
1284: if ($token->[1] =~ /^LONCAPA_INTERNAL_TURN_STYLE_OFF$/) { $Apache::lonxml::usestyle=0; }
1285: $result.=$token->[4];
1286: } elsif ($token->[0] eq 'E') {
1287: if ( $token->[1] =~ /^\Q$tag\E$/i) { $depth--; }
1288: #skip sending back the last end tag
1289: if ($depth == 0 && exists($$style{'/'.$token->[1]}) && $Apache::lonxml::usestyle) {
1290: my $string=
1291: '<LONCAPA_INTERNAL_TURN_STYLE_OFF end="yes" />'.
1292: $$style{'/'.$token->[1]}.
1293: $token->[2].
1294: '<LONCAPA_INTERNAL_TURN_STYLE_ON />';
1295: &Apache::lonxml::newparser($pars,\$string);
1296: #&Apache::lonxml::debug("reParsing $string");
1297: next;
1298: }
1299: if ($depth > -1) {
1300: $result.=$token->[2];
1301: } else {
1302: $$pars[-1]->unget_token($token);
1303: }
1304: }
1305: }
1306: if (($depth >=0) && ($#$pars == 0) ) { $top_empty=1; }
1307: if (($depth >=0) && ($#$pars > 0) ) {
1308: pop(@$pars);
1309: pop(@Apache::lonxml::pwd);
1310: }
1311: }
1312: if ($top_empty && $depth >= 0) {
1313: #never found the end tag ran out of text, throw error send back blank
1314: &error('Never found end tag for <'.$tag.
1315: '> current string <pre>'.
1316: &HTML::Entities::encode($result,'<>&"').
1317: '</pre>');
1318: if ($gotfullstack) {
1319: my $newstring='</'.$tag.'>'.$result;
1320: &Apache::lonxml::newparser($pars,\$newstring);
1321: }
1322: $result='';
1323: }
1324: } else {
1325: while ($#$pars > -1) {
1326: while ($token = $$pars[-1]->get_token) {
1327: #&Apache::lonxml::debug("s token:$token->[0]:$depth:$token->[1]");
1328: if (($token->[0] eq 'T')||($token->[0] eq 'C')||
1329: ($token->[0] eq 'D')) {
1330: if ($token->[2]) {
1331: $result.='<![CDATA['.$token->[1].']]>';
1332: } else {
1333: $result.=$token->[1];
1334: }
1335: } elsif ($token->[0] eq 'PI') {
1336: $result.=$token->[2];
1337: } elsif ($token->[0] eq 'S') {
1338: if ( $token->[1] =~ /^\Q$tag\E$/i) {
1339: $$pars[-1]->unget_token($token); last;
1340: } else {
1341: $result.=$token->[4];
1342: }
1343: if ($token->[1] =~ /^LONCAPA_INTERNAL_TURN_STYLE_ON$/) { $Apache::lonxml::usestyle=1; }
1344: if ($token->[1] =~ /^LONCAPA_INTERNAL_TURN_STYLE_OFF$/) { $Apache::lonxml::usestyle=0; }
1345: } elsif ($token->[0] eq 'E') {
1346: $result.=$token->[2];
1347: }
1348: }
1349: if (($#$pars > 0) ) {
1350: pop(@$pars);
1351: pop(@Apache::lonxml::pwd);
1352: } else { last; }
1353: }
1354: }
1355: #&Apache::lonxml::debug("Exit:$result:");
1356: return $result
1357: }
1358:
1359: sub newparser {
1360: my ($parser,$contentref,$dir) = @_;
1361: push (@$parser,HTML::LCParser->new($contentref));
1362: $$parser[-1]->xml_mode(1);
1363: $$parser[-1]->marked_sections(1);
1364: if ( $dir eq '' ) {
1365: push (@Apache::lonxml::pwd, $Apache::lonxml::pwd[$#Apache::lonxml::pwd]);
1366: } else {
1367: push (@Apache::lonxml::pwd, $dir);
1368: }
1369: }
1370:
1371: sub parstring {
1372: my ($token) = @_;
1373: my (@vars,@values);
1374: foreach my $attr (@{$token->[3]}) {
1375: if ($attr!~/\W/) {
1376: my $val=$token->[2]->{$attr};
1377: $val =~ s/([\%\@\\\"\'])/\\$1/g;
1378: $val =~ s/(\$[^\{a-zA-Z_])/\\$1/g;
1379: $val =~ s/(\$)$/\\$1/;
1380: #if ($val =~ m/^[\%\@]/) { $val="\\".$val; }
1381: push(@vars,"\$$attr");
1382: push(@values,"\"$val\"");
1383: }
1384: }
1385: my $var_init =
1386: (@vars) ? 'my ('.join(',',@vars).') = ('.join(',',@values).');'
1387: : '';
1388: return $var_init;
1389: }
1390:
1391: sub extlink {
1392: my ($res,$exact)=@_;
1393: if (!$exact) {
1394: $res=&Apache::lonnet::hreflocation($Apache::lonxml::pwd[-1],$res);
1395: }
1396: push(@Apache::lonxml::extlinks,$res)
1397: }
1398:
1399: sub writeallows {
1400: unless ($#extlinks>=0) { return; }
1401: my $thisurl = &Apache::lonnet::clutter(shift);
1402: if ($env{'httpref.'.$thisurl}) {
1403: $thisurl=$env{'httpref.'.$thisurl};
1404: }
1405: my $thisdir=$thisurl;
1406: $thisdir=~s/\/[^\/]+$//;
1407: my %httpref=();
1408: foreach (@extlinks) {
1409: $httpref{'httpref.'.
1410: &Apache::lonnet::hreflocation($thisdir,&unescape($_))}=$thisurl;
1411: }
1412: @extlinks=();
1413: &Apache::lonnet::appenv(\%httpref);
1414: }
1415:
1416: sub register_ssi {
1417: my ($url,%form)=@_;
1418: push (@Apache::lonxml::ssi_info,{'url'=>$url,'form'=>\%form});
1419: return '';
1420: }
1421:
1422: sub do_registered_ssi {
1423: foreach my $info (@Apache::lonxml::ssi_info) {
1424: my %form=%{ $info->{'form'}};
1425: my $url=$info->{'url'};
1426: &Apache::lonnet::ssi($url,%form);
1427: }
1428: }
1429:
1430: sub add_script_result {
1431: my ($display) = @_;
1432: push(@script_var_displays, $display);
1433: }
1434:
1435: #
1436: # Afterburner handles anchors, highlights and links
1437: #
1438: sub afterburn {
1439: my $result=shift;
1440: &Apache::loncommon::get_unprocessed_cgi($ENV{'QUERY_STRING'},
1441: ['highlight','anchor','link']);
1442: if ($env{'form.highlight'}) {
1443: foreach (split(/\,/,$env{'form.highlight'})) {
1444: my $anchorname=$_;
1445: my $matchthis=$anchorname;
1446: $matchthis=~s/\_+/\\s\+/g;
1447: $result=~s/(\Q$matchthis\E)/\<font color=\"red\"\>$1\<\/font\>/gs;
1448: }
1449: }
1450: if ($env{'form.link'}) {
1451: foreach (split(/\,/,$env{'form.link'})) {
1452: my ($anchorname,$linkurl)=split(/\>/,$_);
1453: my $matchthis=$anchorname;
1454: $matchthis=~s/\_+/\\s\+/g;
1455: $result=~s/(\Q$matchthis\E)/\<a href=\"$linkurl\"\>$1\<\/a\>/gs;
1456: }
1457: }
1458: if ($env{'form.anchor'}) {
1459: my $anchorname=$env{'form.anchor'};
1460: my $matchthis=$anchorname;
1461: $matchthis=~s/\_+/\\s\+/g;
1462: $result=~s/(\Q$matchthis\E)/\<a name=\"$anchorname\"\>$1\<\/a\>/s;
1463: $result.=(<<"ENDSCRIPT");
1464: <script type="text/javascript">
1465: document.location.hash='$anchorname';
1466: </script>
1467: ENDSCRIPT
1468: }
1469: return $result;
1470: }
1471:
1472: sub storefile {
1473: my ($file,$contents)=@_;
1474: &Apache::lonnet::correct_line_ends(\$contents);
1475: if (my $fh=Apache::File->new('>'.$file)) {
1476: print $fh $contents;
1477: $fh->close();
1478: return 1;
1479: } else {
1480: &warning(&mt('Unable to save file [_1]','<tt>'.$file.'</tt>'));
1481: return 0;
1482: }
1483: }
1484:
1485: sub createnewhtml {
1486: my $title=&mt('Title of document goes here');
1487: my $body=&mt('Body of document goes here');
1488: my $filecontents=(<<SIMPLECONTENT);
1489: <html>
1490: <head>
1491: <title>$title</title>
1492: </head>
1493: <body bgcolor="#FFFFFF">
1494: $body
1495: </body>
1496: </html>
1497: SIMPLECONTENT
1498: return $filecontents;
1499: }
1500:
1501: sub createnewsty {
1502: my $filecontents=(<<SIMPLECONTENT);
1503: <definetag name="">
1504: <render>
1505: <web></web>
1506: <tex></tex>
1507: </render>
1508: </definetag>
1509: SIMPLECONTENT
1510: return $filecontents;
1511: }
1512:
1513: sub createnewjs {
1514: my $filecontents=(<<SIMPLECONTENT);
1515: <script type="text/javascript" language="Javascript">
1516:
1517: </script>
1518: SIMPLECONTENT
1519: return $filecontents;
1520: }
1521:
1522: sub verify_html {
1523: my ($filecontents)=@_;
1524: if ($filecontents!~/(?:\<|\<\;)(?:html|xml)[^\<]*(?:\>|\>\;)/is) {
1525: return &mt('File does not have [_1] or [_2] starting tag','<html>','<xml>');
1526: }
1527: if ($filecontents!~/(?:\<|\<\;)\/(?:html|xml)(?:\>|\>\;)/is) {
1528: return &mt('File does not have [_1] or [_2] ending tag','<html>','<xml>');
1529: }
1530: if ($filecontents!~/(?:\<|\<\;)(?:body|frameset)[^\<]*(?:\>|\>\;)/is) {
1531: return &mt('File does not have [_1] or [_2] starting tag','<body>','<frameset>');
1532: }
1533: if ($filecontents!~/(?:\<|\<\;)\/(?:body|frameset)[^\<]*(?:\>|\>\;)/is) {
1534: return &mt('File does not have [_1] or [_2] ending tag','<body>','<frameset>');
1535: }
1536: return '';
1537: }
1538:
1539: sub renderingoptions {
1540: my %langchoices=('' => '');
1541: foreach (&Apache::loncommon::languageids()) {
1542: if (&Apache::loncommon::supportedlanguagecode($_)) {
1543: $langchoices{&Apache::loncommon::supportedlanguagecode($_)}
1544: = &Apache::loncommon::plainlanguagedescription($_);
1545: }
1546: }
1547: return
1548: '<span class="LC_nobreak">'.
1549: &mt('Language:').' '.
1550: &Apache::loncommon::select_form($env{'form.languages'},'languages',
1551: %langchoices).'
1552: </span>
1553: <span class="LC_nobreak">'.
1554: &mt('Math Rendering:').' '.
1555: &Apache::loncommon::select_form($env{'form.texengine'},'texengine',
1556: ('' => '',
1557: 'tth' => 'tth (TeX to HTML)',
1558: 'jsMath' => 'jsMath',
1559: 'mimetex' => 'mimetex (Convert to Images)')).'
1560: </span>';
1561: }
1562:
1563: sub inserteditinfo {
1564: my ($filecontents, $filetype, $filename)=@_;
1565: $filecontents = &HTML::Entities::encode($filecontents,'<>&"');
1566: my $xml_help = '';
1567: my $initialize='';
1568: my $textarea_id = 'filecont';
1569: my $dragmath_button;
1570: my ($add_to_onload, $add_to_onresize);
1571: $initialize=&Apache::lonhtmlcommon::spellheader();
1572: if ($filetype eq 'html'
1573: && (!&Apache::lonhtmlcommon::htmlareablocked() &&
1574: &Apache::lonhtmlcommon::htmlareabrowser())) {
1575: $textarea_id .= '___Frame';
1576: my $lang = &Apache::lonhtmlcommon::htmlarea_lang();
1577: $initialize.=(<<FULLPAGE);
1578: <script type="text/javascript">
1579: lonca
1580: function initDocument() {
1581: var oFCKeditor = new FCKeditor('filecont');
1582: oFCKeditor.Config['CustomConfigurationsPath'] = '/fckeditor/loncapaconfig.js' ;
1583: oFCKeditor.Config['FullPage'] = true
1584: oFCKeditor.Config['AutoDetectLanguage'] = false;
1585: oFCKeditor.Config['DefaultLanguage'] = "$lang";
1586: oFCKeditor.ReplaceTextarea();
1587: }
1588: function check_if_dirty(editor) {
1589: if (editor.IsDirty()) {
1590: unClean();
1591: }
1592: }
1593: function FCKeditor_OnComplete(editor) {
1594: editor.Events.AttachEvent("OnSelectionChange",check_if_dirty);
1595: resize_textarea('$textarea_id','LC_aftertextarea');
1596: }
1597: </script>
1598: FULLPAGE
1599: } else {
1600: $initialize.=(<<FULLPAGE);
1601: <script type="text/javascript">
1602: function initDocument() {
1603: resize_textarea('$textarea_id','LC_aftertextarea');
1604: }
1605: </script>
1606: FULLPAGE
1607: if ($filetype eq 'html') {
1608: $initialize .= "\n".&Apache::lonhtmlcommon::dragmath_js('EditMathPopup');
1609: $dragmath_button = &Apache::lonhtmlcommon::dragmath_button('filecont',1);
1610: }
1611: }
1612:
1613: $add_to_onload = 'initDocument();';
1614: $add_to_onresize = "resize_textarea('$textarea_id','LC_aftertextarea');";
1615:
1616: if ($filetype eq 'html') {
1617: $xml_help=&Apache::loncommon::helpLatexCheatsheet();
1618: }
1619:
1620: my $titledisplay=&display_title();
1621: my %lt=&Apache::lonlocal::texthash('st' => 'Save and Edit',
1622: 'vi' => 'Save and View',
1623: 'dv' => 'Discard Edits and View',
1624: 'un' => 'undo',
1625: 'ed' => 'Edit');
1626: my $spelllink .=&Apache::lonhtmlcommon::spelllink('xmledit','filecont');
1627: my $textarea_events = &Apache::edit::element_change_detection();
1628: my $form_events = &Apache::edit::form_change_detection();
1629: my $htmlerror;
1630: if ($filetype eq 'html') {
1631: $htmlerror=&verify_html($filecontents);
1632: if ($htmlerror) {
1633: $htmlerror='<span class="LC_error">'.$htmlerror.'</span>';
1634: }
1635: }
1636: my $editfooter=(<<ENDFOOTER);
1637: $initialize
1638: <a name="editsection" />
1639: <form $form_events method="post" name="xmledit">
1640: <div class="LC_edit_problem_editxml_header">
1641: <table class="LC_edit_problem_header_title"><tr><td>
1642: $filename
1643: </td><td align="right">
1644: $xml_help
1645: </td></tr>
1646: </table>
1647: <div class="LC_edit_problem_discards">
1648: <input type="submit" name="discardview" accesskey="d" value="$lt{'dv'}" />
1649: <input type="submit" name="Undo" accesskey="u" value="$lt{'un'}" />
1650: $dragmath_button $spelllink $htmlerror
1651: </div>
1652: <div class="LC_edit_problem_saves">
1653: <input type="submit" name="savethisfile" accesskey="s" value="$lt{'st'}" />
1654: <input type="submit" name="viewmode" accesskey="v" value="$lt{'vi'}" />
1655: </div>
1656: </div>
1657: <textarea $textarea_events style="width:100%" cols="80" rows="44" name="filecont" id="filecont">$filecontents</textarea>
1658: <div id="LC_aftertextarea">
1659: <br />
1660: $titledisplay
1661: </div>
1662: </form>
1663: </body>
1664: ENDFOOTER
1665: return ($editfooter,$add_to_onload,$add_to_onresize);;
1666: }
1667:
1668: sub get_target {
1669: my $viewgrades=&Apache::lonnet::allowed('vgr',$env{'request.course.id'});
1670: if ( $env{'request.state'} eq 'published') {
1671: if ( defined($env{'form.grade_target'})
1672: && ($viewgrades == 'F' )) {
1673: return ($env{'form.grade_target'});
1674: } elsif (defined($env{'form.grade_target'})) {
1675: if (($env{'form.grade_target'} eq 'web') ||
1676: ($env{'form.grade_target'} eq 'tex') ) {
1677: return $env{'form.grade_target'}
1678: } else {
1679: return 'web';
1680: }
1681: } else {
1682: return 'web';
1683: }
1684: } elsif ($env{'request.state'} eq 'construct') {
1685: if ( defined($env{'form.grade_target'})) {
1686: return ($env{'form.grade_target'});
1687: } else {
1688: return 'web';
1689: }
1690: } else {
1691: return 'web';
1692: }
1693: }
1694:
1695: sub handler {
1696: my $request=shift;
1697:
1698: my $target=&get_target();
1699: $Apache::lonxml::debug=$env{'user.debug'};
1700:
1701: &Apache::loncommon::content_type($request,'text/html');
1702: &Apache::loncommon::no_cache($request);
1703: if ($env{'request.state'} eq 'published') {
1704: $request->set_last_modified(&Apache::lonnet::metadata($request->uri,
1705: 'lastrevisiondate'));
1706: }
1707: $request->send_http_header;
1708:
1709: return OK if $request->header_only;
1710:
1711:
1712: my $file=&Apache::lonnet::filelocation("",$request->uri);
1713: my $filetype;
1714: if ($file =~ /\.(sty|css|js|txt)$/) {
1715: $filetype=$1;
1716: } else {
1717: $filetype='html';
1718: }
1719:
1720: #
1721: # Edit action? Save file.
1722: #
1723: if (!($env{'request.state'} eq 'published')) {
1724: if ($env{'form.savethisfile'} || $env{'form.viewmode'} || $env{'form.Undo'}) {
1725: my $html_file=&Apache::lonnet::getfile($file);
1726: my $error = &Apache::lonhomework::handle_save_or_undo($request, \$html_file, \$env{'form.filecont'});
1727: if ($env{'form.savethisfile'}) {
1728: $env{'form.editmode'}='Edit'; #force edit mode
1729: }
1730: }
1731: }
1732: my %mystyle;
1733: my $result = '';
1734: my $filecontents=&Apache::lonnet::getfile($file);
1735: if ($filecontents eq -1) {
1736: my $start_page=&Apache::loncommon::start_page('File Error');
1737: my $end_page=&Apache::loncommon::end_page();
1738: my $fnf=&mt('File not found');
1739: $result=(<<ENDNOTFOUND);
1740: $start_page
1741: <b>$fnf: $file</b>
1742: $end_page
1743: ENDNOTFOUND
1744: $filecontents='';
1745: if ($env{'request.state'} ne 'published') {
1746: if ($filetype eq 'sty') {
1747: $filecontents=&createnewsty();
1748: } elsif ($filetype eq 'js') {
1749: $filecontents=&createnewjs();
1750: } elsif (($filetype ne 'css') && ($filetype ne 'txt')) {
1751: $filecontents=&createnewhtml();
1752: }
1753: $env{'form.editmode'}='Edit'; #force edit mode
1754: }
1755: } else {
1756: unless ($env{'request.state'} eq 'published') {
1757: if ($filecontents=~/BEGIN LON-CAPA Internal/) {
1758: &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.'));
1759: }
1760: #
1761: # we are in construction space, see if edit mode forced
1762: &Apache::loncommon::get_unprocessed_cgi($ENV{'QUERY_STRING'},
1763: ['editmode']);
1764: }
1765: if (!$env{'form.editmode'} || $env{'form.viewmode'} || $env{'form.discardview'}) {
1766: if ($filetype eq 'html' || $filetype eq 'sty') {
1767: &Apache::structuretags::reset_problem_globals();
1768: $result = &Apache::lonxml::xmlparse($request,$target,
1769: $filecontents,'',%mystyle);
1770: # .html files may contain <problem> or <Task> need to clean
1771: # up if it did
1772: &Apache::structuretags::reset_problem_globals();
1773: &Apache::lonhomework::finished_parsing();
1774: } else {
1775: $result = $filecontents;
1776: }
1777: &Apache::loncommon::get_unprocessed_cgi($ENV{'QUERY_STRING'},
1778: ['rawmode']);
1779: if ($env{'form.rawmode'}) { $result = $filecontents; }
1780: if ($filetype ne 'html') {
1781: my $nochgview = 1;
1782: my $controls =
1783: ($env{'request.state'} eq 'construct') ? &Apache::londefdef::edit_controls($nochgview)
1784: : '';
1785: if ($filetype ne 'sty') {
1786: $result =~ s/</</g;
1787: $result =~ s/>/>/g;
1788: $result = '<table class="LC_sty_begin">'.
1789: '<tr><td><b><pre>'.$result.
1790: '</pre></b></td></tr></table>';
1791: }
1792: if ($env{'environment.remote'} eq 'off') {
1793: my %options = ('bgcolor' => '#FFFFFF');
1794: $result =
1795: &Apache::loncommon::start_page(undef,undef,\%options).
1796: $controls.
1797: $result.
1798: &Apache::loncommon::end_page();
1799: } else {
1800: $result = $controls.$result;
1801: }
1802: }
1803: }
1804: }
1805:
1806: #
1807: # Edit action? Insert editing commands
1808: #
1809: unless ($env{'request.state'} eq 'published') {
1810: if ($env{'form.editmode'} && (!($env{'form.viewmode'})) && (!($env{'form.discardview'})))
1811: {
1812: my $displayfile=$request->uri;
1813: $displayfile=~s/^\/[^\/]*//;
1814:
1815: my ($edit_info, $add_to_onload, $add_to_onresize)=
1816: &inserteditinfo($filecontents,$filetype,$displayfile);
1817:
1818: my %options =
1819: ('add_entries' =>
1820: {'onresize' => $add_to_onresize,
1821: 'onload' => $add_to_onload, });
1822:
1823: if ($env{'environment.remote'} ne 'off') {
1824: $options{'bgcolor'} = '#FFFFFF';
1825: $options{'only_body'} = 1;
1826: }
1827: my $js =
1828: &Apache::edit::js_change_detection().
1829: &Apache::loncommon::resize_textarea_js();
1830: my $start_page = &Apache::loncommon::start_page(undef,$js,
1831: \%options);
1832: $result=$start_page.
1833: &Apache::lonxml::message_location().
1834: $edit_info.
1835: &Apache::loncommon::end_page();
1836: }
1837: }
1838: if ($filetype eq 'html') { &writeallows($request->uri); }
1839:
1840: &Apache::lonxml::add_messages(\$result);
1841: $request->print($result);
1842:
1843: return OK;
1844: }
1845:
1846: sub display_title {
1847: my $result;
1848: if ($env{'request.state'} eq 'construct') {
1849: my $title=&Apache::lonnet::gettitle();
1850: if (!defined($title) || $title eq '') {
1851: $title = $env{'request.filename'};
1852: $title = substr($title, rindex($title, '/') + 1);
1853: }
1854: $result = "<script type='text/javascript'>top.document.title = '$title - LON-CAPA "
1855: .&mt('Construction Space')."';</script>";
1856: }
1857: return $result;
1858: }
1859:
1860: sub debug {
1861: if ($Apache::lonxml::debug eq "1") {
1862: $|=1;
1863: my $request=$Apache::lonxml::request;
1864: if (!$request) {
1865: eval { $request=Apache->request; };
1866: }
1867: if (!$request) {
1868: eval { $request=Apache2::RequestUtil->request; };
1869: }
1870: $request->print('<font size="-2"><pre>DEBUG:'.&HTML::Entities::encode($_[0],'<>&"')."</pre></font>\n");
1871: #&Apache::lonnet::logthis($_[0]);
1872: }
1873: }
1874:
1875: sub show_error_warn_msg {
1876: if ($env{'request.filename'} eq '/home/httpd/html/res/lib/templates/simpleproblem.problem' &&
1877: &Apache::lonnet::allowed('mdc',$env{'request.course.id'})) {
1878: return 1;
1879: }
1880: return (($Apache::lonxml::debug eq 1) ||
1881: ($env{'request.state'} eq 'construct') ||
1882: ($Apache::lonhomework::browse eq 'F'
1883: &&
1884: $env{'form.show_errors'} eq 'on'));
1885: }
1886:
1887: sub error {
1888: my @errors = @_;
1889:
1890: $errorcount++;
1891:
1892: $Apache::lonxml::internal_error=1;
1893:
1894: if (defined($Apache::inputtags::part)) {
1895: if ( @Apache::inputtags::response ) {
1896: push(@errors,
1897: &mt("This error occurred while processing response [_1] in part [_2]",
1898: $Apache::inputtags::response[-1],
1899: $Apache::inputtags::part));
1900: } else {
1901: push(@errors,
1902: &mt("This error occurred while processing part [_1]",
1903: $Apache::inputtags::part));
1904: }
1905: }
1906:
1907: if ( &show_error_warn_msg() ) {
1908: # If printing in construction space, put the error inside <pre></pre>
1909: push(@Apache::lonxml::error_messages,
1910: $Apache::lonxml::warnings_error_header
1911: .'<div class="LC_error">'
1912: .'<b>'.&mt('ERROR:').' </b>'.join("<br />\n",@errors)
1913: ."</div>\n");
1914: $Apache::lonxml::warnings_error_header='';
1915: } else {
1916: my $errormsg;
1917: my ($symb)=&Apache::lonnet::symbread();
1918: if ( !$symb ) {
1919: #public or browsers
1920: $errormsg=&mt("An error occurred while processing this resource. The author has been notified.");
1921: }
1922: my $host=$Apache::lonnet::perlvar{'lonHostID'};
1923: push(@errors,
1924: &mt("The error occurred on host [_1]",
1925: "<tt>$host</tt>"));
1926:
1927: my $msg = join('<br />', @errors);
1928:
1929: #notify author
1930: &Apache::lonmsg::author_res_msg($env{'request.filename'},$msg);
1931: #notify course
1932: if ( $symb && $env{'request.course.id'} ) {
1933: my $cnum=$env{'course.'.$env{'request.course.id'}.'.num'};
1934: my $cdom=$env{'course.'.$env{'request.course.id'}.'.domain'};
1935: my (undef,%users)=&Apache::lonmsg::decide_receiver(undef,0,1,1,1);
1936: my $declutter=&Apache::lonnet::declutter($env{'request.filename'});
1937: my $baseurl = &Apache::lonnet::clutter($declutter);
1938: my @userlist;
1939: foreach (keys %users) {
1940: my ($user,$domain) = split(/:/, $_);
1941: push(@userlist,"$user\@$domain");
1942: my $key=$declutter.'_'.$user.'_'.$domain;
1943: my %lastnotified=&Apache::lonnet::get('nohist_xmlerrornotifications',
1944: [$key],
1945: $cdom,$cnum);
1946: my $now=time;
1947: if ($now-$lastnotified{$key}>86400) {
1948: my $title = &Apache::lonnet::gettitle($symb);
1949: my $sentmessage;
1950: &Apache::lonmsg::user_normal_msg($user,$domain,
1951: "Error [$title]",$msg,'',$baseurl,'','',
1952: \$sentmessage,$symb,$title,1);
1953: &Apache::lonnet::put('nohist_xmlerrornotifications',
1954: {$key => $now},
1955: $cdom,$cnum);
1956: }
1957: }
1958: if ($env{'request.role.adv'}) {
1959: $errormsg=&mt("An error occurred while processing this resource. The course personnel ([_1]) and the author have been notified.",join(', ',@userlist));
1960: } else {
1961: $errormsg=&mt("An error occurred while processing this resource. The instructor has been notified.");
1962: }
1963: }
1964: push(@Apache::lonxml::error_messages,"<b>$errormsg</b> <br />");
1965: }
1966: }
1967:
1968: sub warning {
1969: $warningcount++;
1970:
1971: if ($env{'form.grade_target'} ne 'tex') {
1972: if ( &show_error_warn_msg() ) {
1973: push(@Apache::lonxml::warning_messages,
1974: $Apache::lonxml::warnings_error_header
1975: .'<div class="LC_warning">'
1976: .&mt('[_1]W[_2]ARNING','<b>','</b>')."<b>:</b> ".join('<br />',@_)
1977: ."</div>\n"
1978: );
1979: $Apache::lonxml::warnings_error_header='';
1980: }
1981: }
1982: }
1983:
1984: sub info {
1985: if ($env{'form.grade_target'} ne 'tex'
1986: && $env{'request.state'} eq 'construct') {
1987: push(@Apache::lonxml::info_messages,join('<br />',@_)."<br />\n");
1988: }
1989: }
1990:
1991: sub message_location {
1992: return '__LONCAPA_INTERNAL_MESSAGE_LOCATION__';
1993: }
1994:
1995: sub add_messages {
1996: my ($msg)=@_;
1997: my $result=join(' ',
1998: @Apache::lonxml::info_messages,
1999: @Apache::lonxml::error_messages,
2000: @Apache::lonxml::warning_messages);
2001: undef(@Apache::lonxml::info_messages);
2002: undef(@Apache::lonxml::error_messages);
2003: undef(@Apache::lonxml::warning_messages);
2004: $$msg=~s/__LONCAPA_INTERNAL_MESSAGE_LOCATION__/$result/;
2005: $$msg=~s/__LONCAPA_INTERNAL_MESSAGE_LOCATION__//g;
2006: }
2007:
2008: sub get_param {
2009: my ($param,$parstack,$safeeval,$context,$case_insensitive) = @_;
2010: if ( ! $context ) { $context = -1; }
2011: my $args ='';
2012: if ( $#$parstack > (-2-$context) ) { $args=$$parstack[$context]; }
2013: if ( ! $Apache::lonxml::usestyle ) {
2014: $args=$Apache::lonxml::style_values.$args;
2015: }
2016: if ( ! $args ) { return undef; }
2017: if ( $case_insensitive ) {
2018: if ($args =~ s/(my (?:.*))(\$\Q$param\E[,\)])/$1.lc($2)/ei) {
2019: return &Apache::run::run("{$args;".'return $'.$param.'}',
2020: $safeeval); #'
2021: } else {
2022: return undef;
2023: }
2024: } else {
2025: if ( $args =~ /my .*\$\Q$param\E[,\)]/ ) {
2026: return &Apache::run::run("{$args;".'return $'.$param.'}',
2027: $safeeval); #'
2028: } else {
2029: return undef;
2030: }
2031: }
2032: }
2033:
2034: sub get_param_var {
2035: my ($param,$parstack,$safeeval,$context,$case_insensitive) = @_;
2036: if ( ! $context ) { $context = -1; }
2037: my $args ='';
2038: if ( $#$parstack > (-2-$context) ) { $args=$$parstack[$context]; }
2039: if ( ! $Apache::lonxml::usestyle ) {
2040: $args=$Apache::lonxml::style_values.$args;
2041: }
2042: &Apache::lonxml::debug("Args are $args param is $param");
2043: if ($case_insensitive) {
2044: if (! ($args=~s/(my (?:.*))(\$\Q$param\E[,\)])/$1.lc($2)/ei)) {
2045: return undef;
2046: }
2047: } elsif ( $args !~ /my .*\$\Q$param\E[,\)]/ ) { return undef; }
2048: my $value=&Apache::run::run("{$args;".'return $'.$param.'}',$safeeval); #'
2049: &Apache::lonxml::debug("first run is $value");
2050: if ($value =~ /^[\$\@\%][a-zA-Z_]\w*$/) {
2051: &Apache::lonxml::debug("doing second");
2052: my @result=&Apache::run::run("return $value",$safeeval,1);
2053: if (!defined($result[0])) {
2054: return $value
2055: } else {
2056: if (wantarray) { return @result; } else { return $result[0]; }
2057: }
2058: } else {
2059: return $value;
2060: }
2061: }
2062:
2063: sub register_insert_xml {
2064: my $parser = HTML::LCParser->new($Apache::lonnet::perlvar{'lonTabDir'}
2065: .'/insertlist.xml');
2066: my ($tagnum,$in_help)=(0,0);
2067: my @alltags;
2068: my $tag;
2069: while (my $token = $parser->get_token()) {
2070: if ($token->[0] eq 'S') {
2071: my $key;
2072: if ($token->[1] eq 'tag') {
2073: $tag = $token->[2]{'name'};
2074: $insertlist{"$tagnum.tag"} = $tag;
2075: $insertlist{"$tag.num"} = $tagnum;
2076: push(@alltags,$tag);
2077: } elsif ($in_help && $token->[1] eq 'file') {
2078: $key = $tag.'.helpfile';
2079: } elsif ($in_help && $token->[1] eq 'description') {
2080: $key = $tag.'.helpdesc';
2081: } elsif ($token->[1] eq 'description' ||
2082: $token->[1] eq 'color' ||
2083: $token->[1] eq 'show' ) {
2084: $key = $tag.'.'.$token->[1];
2085: } elsif ($token->[1] eq 'insert_sub') {
2086: $key = $tag.'.function';
2087: } elsif ($token->[1] eq 'help') {
2088: $in_help=1;
2089: } elsif ($token->[1] eq 'allow') {
2090: $key = $tag.'.allow';
2091: }
2092: if (defined($key)) {
2093: $insertlist{$key} = $parser->get_text();
2094: $insertlist{$key} =~ s/(^\s*|\s*$ )//gx;
2095: }
2096: } elsif ($token->[0] eq 'E') {
2097: if ($token->[1] eq 'tag') {
2098: undef($tag);
2099: $tagnum++;
2100: } elsif ($token->[1] eq 'help') {
2101: undef($in_help);
2102: }
2103: }
2104: }
2105:
2106: # parse the allows and ignore tags set to <show>no</show>
2107: foreach my $tag (@alltags) {
2108: next if (!exists($insertlist{"$tag.allow"}));
2109: my $allow = $insertlist{"$tag.allow"};
2110: foreach my $element (split(',',$allow)) {
2111: $element =~ s/(^\s*|\s*$ )//gx;
2112: if (!exists($insertlist{"$element.show"})
2113: || $insertlist{"$element.show"} ne 'no') {
2114: push(@{ $insertlist{$tag.'.which'} },$element);
2115: }
2116: }
2117: }
2118: }
2119:
2120: sub register_insert {
2121: return ®ister_insert_xml(@_);
2122: # &dump_insertlist('2');
2123: }
2124:
2125: sub dump_insertlist {
2126: my ($ext) = @_;
2127: open(XML,">/tmp/insertlist.xml.$ext");
2128: print XML ("<insertlist>");
2129: my $i=0;
2130:
2131: while (exists($insertlist{"$i.tag"})) {
2132: my $tag = $insertlist{"$i.tag"};
2133: print XML ("
2134: \t<tag name=\"$tag\">");
2135: if (defined($insertlist{"$tag.description"})) {
2136: print XML ("
2137: \t\t<description>".$insertlist{"$tag.description"}."</description>");
2138: }
2139: if (defined($insertlist{"$tag.color"})) {
2140: print XML ("
2141: \t\t<color>".$insertlist{"$tag.color"}."</color>");
2142: }
2143: if (defined($insertlist{"$tag.function"})) {
2144: print XML ("
2145: \t\t<insert_sub>".$insertlist{"$tag.function"}."</insert_sub>");
2146: }
2147: if (defined($insertlist{"$tag.show"})
2148: && $insertlist{"$tag.show"} ne 'yes') {
2149: print XML ("
2150: \t\t<show>".$insertlist{"$tag.show"}."</show>");
2151: }
2152: if (defined($insertlist{"$tag.helpfile"})) {
2153: print XML ("
2154: \t\t<help>
2155: \t\t\t<file>".$insertlist{"$tag.helpfile"}."</file>");
2156: if ($insertlist{"$tag.helpdesc"} ne '') {
2157: print XML ("
2158: \t\t\t<description>".$insertlist{"$tag.helpdesc"}."</description>");
2159: }
2160: print XML ("
2161: \t\t</help>");
2162: }
2163: if (defined($insertlist{"$tag.which"})) {
2164: print XML ("
2165: \t\t<allow>".join(',',sort(@{ $insertlist{"$tag.which"} }))."</allow>");
2166: }
2167: print XML ("
2168: \t</tag>");
2169: $i++;
2170: }
2171: print XML ("\n</insertlist>\n");
2172: close(XML);
2173: }
2174:
2175: sub description {
2176: my ($token)=@_;
2177: my $tag = &get_tag($token);
2178: return $insertlist{$tag.'.description'};
2179: }
2180:
2181: # Returns a list containing the help file, and the description
2182: sub helpinfo {
2183: my ($token)=@_;
2184: my $tag = &get_tag($token);
2185: return ($insertlist{$tag.'.helpfile'}, $insertlist{$tag.'.helpdesc'});
2186: }
2187:
2188: sub get_tag {
2189: my ($token)=@_;
2190: my $tagnum;
2191: my $tag=$token->[1];
2192: foreach my $namespace (reverse(@Apache::lonxml::namespace)) {
2193: my $testtag = $namespace.'::'.$tag;
2194: $tagnum = $insertlist{"$testtag.num"};
2195: last if (defined($tagnum));
2196: }
2197: if (!defined($tagnum)) {
2198: $tagnum = $Apache::lonxml::insertlist{"$tag.num"};
2199: }
2200: return $insertlist{"$tagnum.tag"};
2201: }
2202:
2203: ############################################################
2204: # PDF-FORM-METHODS
2205:
2206: =pod
2207:
2208: =item &print_pdf_radiobutton(fieldname, value, text)
2209:
2210: Returns a latexline to generate a PDF-Form-Radiobutton with Text.
2211:
2212: $fieldname: PDF internalname of the radiobutton
2213: $value: Value of radiobutton (read when dumping the PDF data)
2214: $text: Text on the rightside of the radiobutton
2215:
2216: =cut
2217: sub print_pdf_radiobutton {
2218: my $result = '';
2219: my ($fieldName, $value, $text) = @_;
2220: $result .= '\begin{tabularx}{\textwidth}{p{0cm}X}'."\n";
2221: $result .= '\radioButton[\symbolchoice{circle}]{'.
2222: $fieldName.'}{10bp}{10bp}{'.$value.'}&'.$text."\n";
2223: $result .= '\end{tabularx}' . "\n";
2224: $result .= '\hspace{2mm}' . "\n";
2225: return $result;
2226: }
2227:
2228:
2229: =pod
2230:
2231: =item &print_pdf_start_combobox(fieldname)
2232:
2233: Starts a latexline to generate a PDF-Form-Combobox with text.
2234:
2235: $fieldname: PDF internal name of the Combobox
2236:
2237: =cut
2238: sub print_pdf_start_combobox {
2239: my $result;
2240: my ($fieldName) = @_;
2241: $result .= '\begin{tabularx}{\textwidth}{p{2.5cm}X}'."\n";
2242: $result .= '\comboBox[]{'.$fieldName.'}{2.3cm}{14bp}{'; #
2243:
2244: return $result;
2245: }
2246:
2247:
2248: =pod
2249:
2250: =item &print_pdf_add_combobox_option(options)
2251:
2252: Generates a latexline to add Options to a PDF-Form-ComboBox.
2253:
2254: $option: PDF internal name of the Combobox-Option
2255:
2256: =cut
2257: sub print_pdf_add_combobox_option {
2258:
2259: my $result;
2260: my ($option) = @_;
2261:
2262: $result .= '('.$option.')';
2263:
2264: return $result;
2265: }
2266:
2267:
2268: =pod
2269:
2270: =item &print_pdf_end_combobox(text) {
2271:
2272: Returns latexcode to end a PDF-Form-Combobox with text.
2273:
2274: =cut
2275: sub print_pdf_end_combobox {
2276: my $result;
2277: my ($text) = @_;
2278:
2279: $result .= '}&'.$text."\\\\\n";
2280: $result .= '\end{tabularx}' . "\n";
2281: $result .= '\hspace{2mm}' . "\n";
2282: return $result;
2283: }
2284:
2285:
2286: =pod
2287:
2288: =item &print_pdf_hiddenField(fieldname, user, domain)
2289:
2290: Returns a latexline to generate a PDF-Form-hiddenField with userdata.
2291:
2292: $fieldname label for hiddentextfield
2293: $user: name of user
2294: $domain: domain of user
2295:
2296: =cut
2297: sub print_pdf_hiddenfield {
2298: my $result;
2299: my ($fieldname, $user, $domain) = @_;
2300:
2301: $result .= '\textField [\F{\FHidden}\F{-\FPrint}\V{'.$domain.'&'.$user.'}]{'.$fieldname.'}{0in}{0in}'."\n";
2302:
2303: return $result;
2304: }
2305:
2306: 1;
2307: __END__
2308:
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