1: # The LearningOnline Network with CAPA
2: # XML Parser Module
3: #
4: # $Id: lonxml.pm,v 1.494.4.2 2009/10/04 03:40:13 raeburn 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: $safehole->wrap(\&Apache::lonr::Rentry,$safeeval,'&Rentry');
761: $safehole->wrap(\&Apache::lonr::Rarray,$safeeval,'&Rarray');
762: $safehole->wrap(\&Apache::lonr::r_check,$safeeval,'&r_check');
763: $safehole->wrap(\&Apache::lonr::r_cas_formula_fix,$safeeval,
764: '&r_cas_formula_fix');
765:
766: $safehole->wrap(\&Apache::caparesponse::capa_formula_fix,$safeeval,
767: '&capa_formula_fix');
768:
769: $safehole->wrap(\&Apache::lonlocal::locallocaltime,$safeeval,
770: '&locallocaltime');
771:
772: $safehole->wrap(\&Math::Cephes::asin,$safeeval,'&asin');
773: $safehole->wrap(\&Math::Cephes::acos,$safeeval,'&acos');
774: $safehole->wrap(\&Math::Cephes::atan,$safeeval,'&atan');
775: $safehole->wrap(\&Math::Cephes::sinh,$safeeval,'&sinh');
776: $safehole->wrap(\&Math::Cephes::cosh,$safeeval,'&cosh');
777: $safehole->wrap(\&Math::Cephes::tanh,$safeeval,'&tanh');
778: $safehole->wrap(\&Math::Cephes::asinh,$safeeval,'&asinh');
779: $safehole->wrap(\&Math::Cephes::acosh,$safeeval,'&acosh');
780: $safehole->wrap(\&Math::Cephes::atanh,$safeeval,'&atanh');
781: $safehole->wrap(\&Math::Cephes::erf,$safeeval,'&erf');
782: $safehole->wrap(\&Math::Cephes::erfc,$safeeval,'&erfc');
783: $safehole->wrap(\&Math::Cephes::j0,$safeeval,'&j0');
784: $safehole->wrap(\&Math::Cephes::j1,$safeeval,'&j1');
785: $safehole->wrap(\&Math::Cephes::jn,$safeeval,'&jn');
786: $safehole->wrap(\&Math::Cephes::jv,$safeeval,'&jv');
787: $safehole->wrap(\&Math::Cephes::y0,$safeeval,'&y0');
788: $safehole->wrap(\&Math::Cephes::y1,$safeeval,'&y1');
789: $safehole->wrap(\&Math::Cephes::yn,$safeeval,'&yn');
790: $safehole->wrap(\&Math::Cephes::yv,$safeeval,'&yv');
791:
792: $safehole->wrap(\&Math::Cephes::bdtr ,$safeeval,'&bdtr' );
793: $safehole->wrap(\&Math::Cephes::bdtrc ,$safeeval,'&bdtrc' );
794: $safehole->wrap(\&Math::Cephes::bdtri ,$safeeval,'&bdtri' );
795: $safehole->wrap(\&Math::Cephes::btdtr ,$safeeval,'&btdtr' );
796: $safehole->wrap(\&Math::Cephes::chdtr ,$safeeval,'&chdtr' );
797: $safehole->wrap(\&Math::Cephes::chdtrc,$safeeval,'&chdtrc');
798: $safehole->wrap(\&Math::Cephes::chdtri,$safeeval,'&chdtri');
799: $safehole->wrap(\&Math::Cephes::fdtr ,$safeeval,'&fdtr' );
800: $safehole->wrap(\&Math::Cephes::fdtrc ,$safeeval,'&fdtrc' );
801: $safehole->wrap(\&Math::Cephes::fdtri ,$safeeval,'&fdtri' );
802: $safehole->wrap(\&Math::Cephes::gdtr ,$safeeval,'&gdtr' );
803: $safehole->wrap(\&Math::Cephes::gdtrc ,$safeeval,'&gdtrc' );
804: $safehole->wrap(\&Math::Cephes::nbdtr ,$safeeval,'&nbdtr' );
805: $safehole->wrap(\&Math::Cephes::nbdtrc,$safeeval,'&nbdtrc');
806: $safehole->wrap(\&Math::Cephes::nbdtri,$safeeval,'&nbdtri');
807: $safehole->wrap(\&Math::Cephes::ndtr ,$safeeval,'&ndtr' );
808: $safehole->wrap(\&Math::Cephes::ndtri ,$safeeval,'&ndtri' );
809: $safehole->wrap(\&Math::Cephes::pdtr ,$safeeval,'&pdtr' );
810: $safehole->wrap(\&Math::Cephes::pdtrc ,$safeeval,'&pdtrc' );
811: $safehole->wrap(\&Math::Cephes::pdtri ,$safeeval,'&pdtri' );
812: $safehole->wrap(\&Math::Cephes::stdtr ,$safeeval,'&stdtr' );
813: $safehole->wrap(\&Math::Cephes::stdtri,$safeeval,'&stdtri');
814:
815: $safehole->wrap(\&Math::Cephes::Matrix::mat,$safeeval,'&mat');
816: $safehole->wrap(\&Math::Cephes::Matrix::new,$safeeval,
817: '&Math::Cephes::Matrix::new');
818: $safehole->wrap(\&Math::Cephes::Matrix::coef,$safeeval,
819: '&Math::Cephes::Matrix::coef');
820: $safehole->wrap(\&Math::Cephes::Matrix::clr,$safeeval,
821: '&Math::Cephes::Matrix::clr');
822: $safehole->wrap(\&Math::Cephes::Matrix::add,$safeeval,
823: '&Math::Cephes::Matrix::add');
824: $safehole->wrap(\&Math::Cephes::Matrix::sub,$safeeval,
825: '&Math::Cephes::Matrix::sub');
826: $safehole->wrap(\&Math::Cephes::Matrix::mul,$safeeval,
827: '&Math::Cephes::Matrix::mul');
828: $safehole->wrap(\&Math::Cephes::Matrix::div,$safeeval,
829: '&Math::Cephes::Matrix::div');
830: $safehole->wrap(\&Math::Cephes::Matrix::inv,$safeeval,
831: '&Math::Cephes::Matrix::inv');
832: $safehole->wrap(\&Math::Cephes::Matrix::transp,$safeeval,
833: '&Math::Cephes::Matrix::transp');
834: $safehole->wrap(\&Math::Cephes::Matrix::simq,$safeeval,
835: '&Math::Cephes::Matrix::simq');
836: $safehole->wrap(\&Math::Cephes::Matrix::mat_to_vec,$safeeval,
837: '&Math::Cephes::Matrix::mat_to_vec');
838: $safehole->wrap(\&Math::Cephes::Matrix::vec_to_mat,$safeeval,
839: '&Math::Cephes::Matrix::vec_to_mat');
840: $safehole->wrap(\&Math::Cephes::Matrix::check,$safeeval,
841: '&Math::Cephes::Matrix::check');
842: $safehole->wrap(\&Math::Cephes::Matrix::check,$safeeval,
843: '&Math::Cephes::Matrix::check');
844:
845: # $safehole->wrap(\&Math::Cephes::new_fract,$safeeval,'&new_fract');
846: # $safehole->wrap(\&Math::Cephes::radd,$safeeval,'&radd');
847: # $safehole->wrap(\&Math::Cephes::rsub,$safeeval,'&rsub');
848: # $safehole->wrap(\&Math::Cephes::rmul,$safeeval,'&rmul');
849: # $safehole->wrap(\&Math::Cephes::rdiv,$safeeval,'&rdiv');
850: # $safehole->wrap(\&Math::Cephes::euclid,$safeeval,'&euclid');
851:
852: $safehole->wrap(\&Math::Random::random_beta,$safeeval,'&math_random_beta');
853: $safehole->wrap(\&Math::Random::random_chi_square,$safeeval,'&math_random_chi_square');
854: $safehole->wrap(\&Math::Random::random_exponential,$safeeval,'&math_random_exponential');
855: $safehole->wrap(\&Math::Random::random_f,$safeeval,'&math_random_f');
856: $safehole->wrap(\&Math::Random::random_gamma,$safeeval,'&math_random_gamma');
857: $safehole->wrap(\&Math::Random::random_multivariate_normal,$safeeval,'&math_random_multivariate_normal');
858: $safehole->wrap(\&Math::Random::random_multinomial,$safeeval,'&math_random_multinomial');
859: $safehole->wrap(\&Math::Random::random_noncentral_chi_square,$safeeval,'&math_random_noncentral_chi_square');
860: $safehole->wrap(\&Math::Random::random_noncentral_f,$safeeval,'&math_random_noncentral_f');
861: $safehole->wrap(\&Math::Random::random_normal,$safeeval,'&math_random_normal');
862: $safehole->wrap(\&Math::Random::random_permutation,$safeeval,'&math_random_permutation');
863: $safehole->wrap(\&Math::Random::random_permuted_index,$safeeval,'&math_random_permuted_index');
864: $safehole->wrap(\&Math::Random::random_uniform,$safeeval,'&math_random_uniform');
865: $safehole->wrap(\&Math::Random::random_poisson,$safeeval,'&math_random_poisson');
866: $safehole->wrap(\&Math::Random::random_uniform_integer,$safeeval,'&math_random_uniform_integer');
867: $safehole->wrap(\&Math::Random::random_negative_binomial,$safeeval,'&math_random_negative_binomial');
868: $safehole->wrap(\&Math::Random::random_binomial,$safeeval,'&math_random_binomial');
869: $safehole->wrap(\&Math::Random::random_seed_from_phrase,$safeeval,'&random_seed_from_phrase');
870: $safehole->wrap(\&Math::Random::random_set_seed_from_phrase,$safeeval,'&random_set_seed_from_phrase');
871: $safehole->wrap(\&Math::Random::random_get_seed,$safeeval,'&random_get_seed');
872: $safehole->wrap(\&Math::Random::random_set_seed,$safeeval,'&random_set_seed');
873: $safehole->wrap(\&Apache::loncommon::languages,$safeeval,'&languages');
874: $safehole->wrap(\&Apache::lonxml::error,$safeeval,'&LONCAPA_INTERNAL_ERROR');
875: $safehole->wrap(\&Apache::lonxml::debug,$safeeval,'&LONCAPA_INTERNAL_DEBUG');
876: $safehole->wrap(\&Apache::lonnet::logthis,$safeeval,'&LONCAPA_INTERNAL_LOGTHIS');
877: $safehole->wrap(\&Apache::inputtags::finalizeawards,$safeeval,'&LONCAPA_INTERNAL_FINALIZEAWARDS');
878: $safehole->wrap(\&Apache::caparesponse::get_sigrange,$safeeval,'&LONCAPA_INTERNAL_get_sigrange');
879: # use Data::Dumper;
880: # $safehole->wrap(\&Data::Dumper::Dumper,$safeeval,'&LONCAPA_INTERNAL_Dumper');
881: #need to inspect this class of ops
882: # $safeeval->deny(":base_orig");
883: $safeeval->permit("require");
884: $safeinit .= ';$external::target="'.$target.'";';
885: &Apache::run::run($safeinit,$safeeval);
886: &initialize_rndseed($safeeval);
887: }
888:
889: sub clean_safespace {
890: my ($safeeval) = @_;
891: delete_package_recurse($safeeval->{Root});
892: }
893:
894: sub delete_package_recurse {
895: my ($package) = @_;
896: my @subp;
897: {
898: no strict 'refs';
899: while (my ($key,$val) = each(%{*{"$package\::"}})) {
900: if (!defined($val)) { next; }
901: local (*ENTRY) = $val;
902: if (defined *ENTRY{HASH} && $key =~ /::$/ &&
903: $key ne "main::" && $key ne "<none>::")
904: {
905: my ($p) = $package ne "main" ? "$package\::" : "";
906: ($p .= $key) =~ s/::$//;
907: push(@subp,$p);
908: }
909: }
910: }
911: foreach my $p (@subp) {
912: delete_package_recurse($p);
913: }
914: Symbol::delete_package($package);
915: }
916:
917: sub initialize_rndseed {
918: my ($safeeval)=@_;
919: my $rndseed;
920: my ($symb,$courseid,$domain,$name) = &Apache::lonnet::whichuser();
921: $rndseed=&Apache::lonnet::rndseed($symb,$courseid,$domain,$name);
922: my $safeinit = '$external::randomseed="'.$rndseed.'";';
923: &Apache::lonxml::debug("Setting rndseed to $rndseed");
924: &Apache::run::run($safeinit,$safeeval);
925: }
926:
927: sub default_homework_load {
928: my ($safeeval)=@_;
929: &Apache::lonxml::debug('Loading default_homework');
930: my $default=&Apache::lonnet::getfile('/home/httpd/html/res/adm/includes/default_homework.lcpm');
931: if ($default eq -1) {
932: &Apache::lonxml::error("<b>Unable to find <i>default_homework.lcpm</i></b>");
933: } else {
934: &Apache::run::run($default,$safeeval);
935: $Apache::lonxml::default_homework_loaded=1;
936: }
937: }
938:
939: {
940: my $alarm_depth;
941: sub init_alarm {
942: alarm(0);
943: $alarm_depth=0;
944: }
945:
946: sub start_alarm {
947: if ($alarm_depth<1) {
948: my $old=alarm($Apache::lonnet::perlvar{'lonScriptTimeout'});
949: if ($old) {
950: &Apache::lonxml::error("Cancelled an alarm of $old, this shouldn't occur.");
951: }
952: }
953: $alarm_depth++;
954: }
955:
956: sub end_alarm {
957: $alarm_depth--;
958: if ($alarm_depth<1) { alarm(0); }
959: }
960: }
961: my $metamode_was;
962: sub startredirection {
963: if (!$Apache::lonxml::redirection) {
964: $metamode_was=$Apache::lonxml::metamode;
965: }
966: $Apache::lonxml::metamode=0;
967: $Apache::lonxml::redirection++;
968: push (@Apache::lonxml::outputstack, '');
969: }
970:
971: sub endredirection {
972: if (!$Apache::lonxml::redirection) {
973: &Apache::lonxml::error("Endredirection was called before a startredirection, perhaps you have unbalanced tags. Some debugging information:".join ":",caller);
974: return '';
975: }
976: $Apache::lonxml::redirection--;
977: if (!$Apache::lonxml::redirection) {
978: $Apache::lonxml::metamode=$metamode_was;
979: }
980: pop @Apache::lonxml::outputstack;
981: }
982: sub in_redirection {
983: return ($Apache::lonxml::redirection > 0)
984: }
985:
986: sub end_tag {
987: my ($tagstack,$parstack,$token)=@_;
988: pop(@$tagstack);
989: pop(@$parstack);
990: &decreasedepth($token);
991: }
992:
993: sub initdepth {
994: @Apache::lonxml::depthcounter=();
995: undef($Apache::lonxml::last_depth_count);
996: }
997:
998:
999: my @timers;
1000: my $lasttime;
1001: # @Apache::lonxml::depthcounter -> count of tags that exist so
1002: # far at each level
1003: # $Apache::lonxml::last_depth_count -> when ascending, need to
1004: # remember the count for the level below the current level (for
1005: # example going from 1_2 -> 1 -> 1_3 need to remember the 2 )
1006:
1007: sub increasedepth {
1008: my ($token) = @_;
1009: push(@Apache::lonxml::depthcounter,$Apache::lonxml::last_depth_count+1);
1010: undef($Apache::lonxml::last_depth_count);
1011: my $time;
1012: if ($Apache::lonxml::debug eq "1") {
1013: push(@timers,[&gettimeofday()]);
1014: $time=&tv_interval($lasttime);
1015: $lasttime=[&gettimeofday()];
1016: }
1017: my $spacing=' 'x($#Apache::lonxml::depthcounter);
1018: $Apache::lonxml::curdepth=join('_',@Apache::lonxml::depthcounter);
1019: # &Apache::lonxml::debug("s$spacing$Apache::lonxml::depth : $Apache::lonxml::olddepth : $Apache::lonxml::curdepth : $token->[1] : $time");
1020: #print "<br />s $Apache::lonxml::depth : $Apache::lonxml::olddepth : $curdepth : $token->[1]\n";
1021: }
1022:
1023: sub decreasedepth {
1024: my ($token) = @_;
1025: if ( $#Apache::lonxml::depthcounter == -1) {
1026: &Apache::lonxml::warning(&mt("Missing tags, unable to properly run file."));
1027: }
1028: $Apache::lonxml::last_depth_count = pop(@Apache::lonxml::depthcounter);
1029:
1030: my ($timer,$time);
1031: if ($Apache::lonxml::debug eq "1") {
1032: $timer=pop(@timers);
1033: $time=&tv_interval($lasttime);
1034: $lasttime=[&gettimeofday()];
1035: }
1036: my $spacing=' 'x($#Apache::lonxml::depthcounter);
1037: $Apache::lonxml::curdepth = join('_',@Apache::lonxml::depthcounter);
1038: # &Apache::lonxml::debug("e$spacing$Apache::lonxml::depth : $Apache::lonxml::olddepth : $Apache::lonxml::curdepth : $token->[1] : $time : ".&tv_interval($timer));
1039: #print "<br />e $Apache::lonxml::depth : $Apache::lonxml::olddepth : $token->[1] : $curdepth\n";
1040: }
1041:
1042: sub get_id {
1043: my ($parstack,$safeeval)=@_;
1044: my $id= &Apache::lonxml::get_param('id',$parstack,$safeeval);
1045: if ($env{'request.state'} eq 'construct' && $id =~ /([._]|[^\w\d\s[:punct:]])/) {
1046: &error(&mt("ID [_1] contains invalid characters, IDs are only allowed to contain letters, numbers, spaces and -",'<tt>'.$id.'</tt>'));
1047: }
1048: if ($id =~ /^\s*$/) { $id = $Apache::lonxml::curdepth; }
1049: return $id;
1050: }
1051:
1052: sub get_all_text_unbalanced {
1053: #there is a copy of this in lonpublisher.pm
1054: my($tag,$pars)= @_;
1055: my $token;
1056: my $result='';
1057: $tag='<'.$tag.'>';
1058: while ($token = $$pars[-1]->get_token) {
1059: if (($token->[0] eq 'T')||($token->[0] eq 'C')||($token->[0] eq 'D')) {
1060: if ($token->[0] eq 'T' && $token->[2]) {
1061: $result.='<![CDATA['.$token->[1].']]>';
1062: } else {
1063: $result.=$token->[1];
1064: }
1065: } elsif ($token->[0] eq 'PI') {
1066: $result.=$token->[2];
1067: } elsif ($token->[0] eq 'S') {
1068: $result.=$token->[4];
1069: } elsif ($token->[0] eq 'E') {
1070: $result.=$token->[2];
1071: }
1072: if ($result =~ /\Q$tag\E/is) {
1073: ($result,my $redo)=$result =~ /(.*)\Q$tag\E(.*)/is;
1074: #&Apache::lonxml::debug('Got a winner with leftovers ::'.$2);
1075: #&Apache::lonxml::debug('Result is :'.$1);
1076: $redo=$tag.$redo;
1077: &Apache::lonxml::newparser($pars,\$redo);
1078: last;
1079: }
1080: }
1081: return $result
1082:
1083: }
1084:
1085: #########################################################################
1086: # #
1087: # bubble line counter management #
1088: # #
1089: #########################################################################
1090:
1091: =pod
1092:
1093: For bubble grading mode and exam bubble printing mode, the tracking of
1094: the current 'bubble line number' is stored in the %env element
1095: 'form.counter', and is modifed and handled by the following routines.
1096:
1097: The value of it is stored in $Apache:lonxml::counter when live and
1098: stored back to env after done.
1099:
1100: =item &increment_counter($increment);
1101:
1102: Increments the internal counter environment variable a specified amount
1103:
1104: Optional Arguments:
1105: $increment - amount to increment by (defaults to 1)
1106: Also 1 if the value is negative or zero.
1107: $part_response - A concatenation of the part and response id
1108: identifying exactly what is being 'answered'.
1109:
1110:
1111: =cut
1112:
1113: sub increment_counter {
1114: my ($increment, $part_response) = @_;
1115: if ($env{'form.grade_noincrement'}) { return; }
1116: if (!defined($increment) || $increment le 0) {
1117: $increment = 1;
1118: }
1119: $Apache::lonxml::counter += $increment;
1120:
1121: # If the caller supplied the response_id parameter,
1122: # Maintain its counter.. creating if necessary.
1123:
1124: if (defined($part_response)) {
1125: if (!defined($Apache::lonxml::counters_per_part{$part_response})) {
1126: $Apache::lonxml::counters_per_part{$part_response} = 0;
1127: }
1128: $Apache::lonxml::counters_per_part{$part_response} += $increment;
1129: my $new_value = $Apache::lonxml::counters_per_part{$part_response};
1130: }
1131:
1132: $Apache::lonxml::counter_changed=1;
1133: }
1134:
1135: =pod
1136:
1137: =item &init_counter($increment);
1138:
1139: Initialize the internal counter environment variable
1140:
1141: =cut
1142:
1143: sub init_counter {
1144: if ($env{'request.state'} eq 'construct') {
1145: $Apache::lonxml::counter=1;
1146: $Apache::lonxml::counter_changed=1;
1147: } elsif (defined($env{'form.counter'})) {
1148: $Apache::lonxml::counter=$env{'form.counter'};
1149: $Apache::lonxml::counter_changed=0;
1150: } else {
1151: $Apache::lonxml::counter=1;
1152: $Apache::lonxml::counter_changed=1;
1153: }
1154: }
1155:
1156: sub store_counter {
1157: &Apache::lonnet::appenv({'form.counter' => $Apache::lonxml::counter});
1158: $Apache::lonxml::counter_changed=0;
1159: return '';
1160: }
1161:
1162: {
1163: my $state;
1164: sub clear_problem_counter {
1165: undef($state);
1166: &Apache::lonnet::delenv('form.counter');
1167: &Apache::lonxml::init_counter();
1168: &Apache::lonxml::store_counter();
1169: }
1170:
1171: sub remember_problem_counter {
1172: &Apache::lonnet::transfer_profile_to_env(undef,undef,1);
1173: $state = $env{'form.counter'};
1174: }
1175:
1176: sub restore_problem_counter {
1177: if (defined($state)) {
1178: &Apache::lonnet::appenv({'form.counter' => $state});
1179: }
1180: }
1181: sub get_problem_counter {
1182: if ($Apache::lonxml::counter_changed) { &store_counter() }
1183: &Apache::lonnet::transfer_profile_to_env(undef,undef,1);
1184: return $env{'form.counter'};
1185: }
1186: }
1187:
1188: =pod
1189:
1190: =item bubble_lines_for_part(part_response)
1191:
1192: Returns the number of lines required to get a response for
1193: $part_response (this is just $Apache::lonxml::counters_per_part{$part_response}
1194:
1195: =cut
1196:
1197: sub bubble_lines_for_part {
1198: my ($part_response) = @_;
1199:
1200: if (!defined($Apache::lonxml::counters_per_part{$part_response})) {
1201: return 0;
1202: } else {
1203: return $Apache::lonxml::counters_per_part{$part_response};
1204: }
1205: }
1206:
1207: =pod
1208:
1209: =item clear_bubble_lines_for_part
1210:
1211: Clears the hash of bubble lines per part. If a caller
1212: needs to analyze several resources this should be called between
1213: resources to reset the hash for each problem being analyzed.
1214:
1215: =cut
1216:
1217: sub clear_bubble_lines_for_part {
1218: undef(%Apache::lonxml::counters_per_part);
1219: }
1220:
1221: =pod
1222:
1223: =item set_bubble_lines(part_response, value)
1224:
1225: If there is a problem part, that for whatever reason
1226: requires bubble lines that are not
1227: the same as the counter increment, it can call this sub during
1228: analysis to set its hash value explicitly.
1229:
1230: =cut
1231:
1232: sub set_bubble_lines {
1233: my ($part_response, $value) = @_;
1234:
1235: $Apache::lonxml::counters_per_part{$part_response} = $value;
1236: }
1237:
1238: =pod
1239:
1240: =item get_bubble_line_hash
1241:
1242: Returns the current bubble line hash. This is assumed to
1243: be small so we return a copy
1244:
1245:
1246: =cut
1247:
1248: sub get_bubble_line_hash {
1249: return %Apache::lonxml::counters_per_part;
1250: }
1251:
1252:
1253: #--------------------------------------------------
1254:
1255: sub get_all_text {
1256: my($tag,$pars,$style)= @_;
1257: my $gotfullstack=1;
1258: if (ref($pars) ne 'ARRAY') {
1259: $gotfullstack=0;
1260: $pars=[$pars];
1261: }
1262: if (ref($style) ne 'HASH') {
1263: $style={};
1264: }
1265: my $depth=0;
1266: my $token;
1267: my $result='';
1268: if ( $tag =~ m:^/: ) {
1269: my $tag=substr($tag,1);
1270: #&Apache::lonxml::debug("have:$tag:");
1271: my $top_empty=0;
1272: while (($depth >=0) && ($#$pars > -1) && (!$top_empty)) {
1273: while (($depth >=0) && ($token = $$pars[-1]->get_token)) {
1274: #&Apache::lonxml::debug("e token:$token->[0]:$depth:$token->[1]:".$#$pars.":".$#Apache::lonxml::pwd);
1275: if (($token->[0] eq 'T')||($token->[0] eq 'C')||($token->[0] eq 'D')) {
1276: if ($token->[2]) {
1277: $result.='<![CDATA['.$token->[1].']]>';
1278: } else {
1279: $result.=$token->[1];
1280: }
1281: } elsif ($token->[0] eq 'PI') {
1282: $result.=$token->[2];
1283: } elsif ($token->[0] eq 'S') {
1284: if ($token->[1] =~ /^\Q$tag\E$/i) { $depth++; }
1285: if ($token->[1] =~ /^LONCAPA_INTERNAL_TURN_STYLE_ON$/) { $Apache::lonxml::usestyle=1; }
1286: if ($token->[1] =~ /^LONCAPA_INTERNAL_TURN_STYLE_OFF$/) { $Apache::lonxml::usestyle=0; }
1287: $result.=$token->[4];
1288: } elsif ($token->[0] eq 'E') {
1289: if ( $token->[1] =~ /^\Q$tag\E$/i) { $depth--; }
1290: #skip sending back the last end tag
1291: if ($depth == 0 && exists($$style{'/'.$token->[1]}) && $Apache::lonxml::usestyle) {
1292: my $string=
1293: '<LONCAPA_INTERNAL_TURN_STYLE_OFF end="yes" />'.
1294: $$style{'/'.$token->[1]}.
1295: $token->[2].
1296: '<LONCAPA_INTERNAL_TURN_STYLE_ON />';
1297: &Apache::lonxml::newparser($pars,\$string);
1298: #&Apache::lonxml::debug("reParsing $string");
1299: next;
1300: }
1301: if ($depth > -1) {
1302: $result.=$token->[2];
1303: } else {
1304: $$pars[-1]->unget_token($token);
1305: }
1306: }
1307: }
1308: if (($depth >=0) && ($#$pars == 0) ) { $top_empty=1; }
1309: if (($depth >=0) && ($#$pars > 0) ) {
1310: pop(@$pars);
1311: pop(@Apache::lonxml::pwd);
1312: }
1313: }
1314: if ($top_empty && $depth >= 0) {
1315: #never found the end tag ran out of text, throw error send back blank
1316: &error('Never found end tag for <'.$tag.
1317: '> current string <pre>'.
1318: &HTML::Entities::encode($result,'<>&"').
1319: '</pre>');
1320: if ($gotfullstack) {
1321: my $newstring='</'.$tag.'>'.$result;
1322: &Apache::lonxml::newparser($pars,\$newstring);
1323: }
1324: $result='';
1325: }
1326: } else {
1327: while ($#$pars > -1) {
1328: while ($token = $$pars[-1]->get_token) {
1329: #&Apache::lonxml::debug("s token:$token->[0]:$depth:$token->[1]");
1330: if (($token->[0] eq 'T')||($token->[0] eq 'C')||
1331: ($token->[0] eq 'D')) {
1332: if ($token->[2]) {
1333: $result.='<![CDATA['.$token->[1].']]>';
1334: } else {
1335: $result.=$token->[1];
1336: }
1337: } elsif ($token->[0] eq 'PI') {
1338: $result.=$token->[2];
1339: } elsif ($token->[0] eq 'S') {
1340: if ( $token->[1] =~ /^\Q$tag\E$/i) {
1341: $$pars[-1]->unget_token($token); last;
1342: } else {
1343: $result.=$token->[4];
1344: }
1345: if ($token->[1] =~ /^LONCAPA_INTERNAL_TURN_STYLE_ON$/) { $Apache::lonxml::usestyle=1; }
1346: if ($token->[1] =~ /^LONCAPA_INTERNAL_TURN_STYLE_OFF$/) { $Apache::lonxml::usestyle=0; }
1347: } elsif ($token->[0] eq 'E') {
1348: $result.=$token->[2];
1349: }
1350: }
1351: if (($#$pars > 0) ) {
1352: pop(@$pars);
1353: pop(@Apache::lonxml::pwd);
1354: } else { last; }
1355: }
1356: }
1357: #&Apache::lonxml::debug("Exit:$result:");
1358: return $result
1359: }
1360:
1361: sub newparser {
1362: my ($parser,$contentref,$dir) = @_;
1363: push (@$parser,HTML::LCParser->new($contentref));
1364: $$parser[-1]->xml_mode(1);
1365: $$parser[-1]->marked_sections(1);
1366: if ( $dir eq '' ) {
1367: push (@Apache::lonxml::pwd, $Apache::lonxml::pwd[$#Apache::lonxml::pwd]);
1368: } else {
1369: push (@Apache::lonxml::pwd, $dir);
1370: }
1371: }
1372:
1373: sub parstring {
1374: my ($token) = @_;
1375: my (@vars,@values);
1376: foreach my $attr (@{$token->[3]}) {
1377: if ($attr!~/\W/) {
1378: my $val=$token->[2]->{$attr};
1379: $val =~ s/([\%\@\\\"\'])/\\$1/g;
1380: $val =~ s/(\$[^\{a-zA-Z_])/\\$1/g;
1381: $val =~ s/(\$)$/\\$1/;
1382: #if ($val =~ m/^[\%\@]/) { $val="\\".$val; }
1383: push(@vars,"\$$attr");
1384: push(@values,"\"$val\"");
1385: }
1386: }
1387: my $var_init =
1388: (@vars) ? 'my ('.join(',',@vars).') = ('.join(',',@values).');'
1389: : '';
1390: return $var_init;
1391: }
1392:
1393: sub extlink {
1394: my ($res,$exact)=@_;
1395: if (!$exact) {
1396: $res=&Apache::lonnet::hreflocation($Apache::lonxml::pwd[-1],$res);
1397: }
1398: push(@Apache::lonxml::extlinks,$res)
1399: }
1400:
1401: sub writeallows {
1402: unless ($#extlinks>=0) { return; }
1403: my $thisurl = &Apache::lonnet::clutter(shift);
1404: if ($env{'httpref.'.$thisurl}) {
1405: $thisurl=$env{'httpref.'.$thisurl};
1406: }
1407: my $thisdir=$thisurl;
1408: $thisdir=~s/\/[^\/]+$//;
1409: my %httpref=();
1410: foreach (@extlinks) {
1411: $httpref{'httpref.'.
1412: &Apache::lonnet::hreflocation($thisdir,&unescape($_))}=$thisurl;
1413: }
1414: @extlinks=();
1415: &Apache::lonnet::appenv(\%httpref);
1416: }
1417:
1418: sub register_ssi {
1419: my ($url,%form)=@_;
1420: push (@Apache::lonxml::ssi_info,{'url'=>$url,'form'=>\%form});
1421: return '';
1422: }
1423:
1424: sub do_registered_ssi {
1425: foreach my $info (@Apache::lonxml::ssi_info) {
1426: my %form=%{ $info->{'form'}};
1427: my $url=$info->{'url'};
1428: &Apache::lonnet::ssi($url,%form);
1429: }
1430: }
1431:
1432: sub add_script_result {
1433: my ($display) = @_;
1434: push(@script_var_displays, $display);
1435: }
1436:
1437: #
1438: # Afterburner handles anchors, highlights and links
1439: #
1440: sub afterburn {
1441: my $result=shift;
1442: &Apache::loncommon::get_unprocessed_cgi($ENV{'QUERY_STRING'},
1443: ['highlight','anchor','link']);
1444: if ($env{'form.highlight'}) {
1445: foreach (split(/\,/,$env{'form.highlight'})) {
1446: my $anchorname=$_;
1447: my $matchthis=$anchorname;
1448: $matchthis=~s/\_+/\\s\+/g;
1449: $result=~s/(\Q$matchthis\E)/\<font color=\"red\"\>$1\<\/font\>/gs;
1450: }
1451: }
1452: if ($env{'form.link'}) {
1453: foreach (split(/\,/,$env{'form.link'})) {
1454: my ($anchorname,$linkurl)=split(/\>/,$_);
1455: my $matchthis=$anchorname;
1456: $matchthis=~s/\_+/\\s\+/g;
1457: $result=~s/(\Q$matchthis\E)/\<a href=\"$linkurl\"\>$1\<\/a\>/gs;
1458: }
1459: }
1460: if ($env{'form.anchor'}) {
1461: my $anchorname=$env{'form.anchor'};
1462: my $matchthis=$anchorname;
1463: $matchthis=~s/\_+/\\s\+/g;
1464: $result=~s/(\Q$matchthis\E)/\<a name=\"$anchorname\"\>$1\<\/a\>/s;
1465: $result.=(<<"ENDSCRIPT");
1466: <script type="text/javascript">
1467: document.location.hash='$anchorname';
1468: </script>
1469: ENDSCRIPT
1470: }
1471: return $result;
1472: }
1473:
1474: sub storefile {
1475: my ($file,$contents)=@_;
1476: &Apache::lonnet::correct_line_ends(\$contents);
1477: if (my $fh=Apache::File->new('>'.$file)) {
1478: print $fh $contents;
1479: $fh->close();
1480: return 1;
1481: } else {
1482: &warning(&mt('Unable to save file [_1]','<tt>'.$file.'</tt>'));
1483: return 0;
1484: }
1485: }
1486:
1487: sub createnewhtml {
1488: my $title=&mt('Title of document goes here');
1489: my $body=&mt('Body of document goes here');
1490: my $filecontents=(<<SIMPLECONTENT);
1491: <html>
1492: <head>
1493: <title>$title</title>
1494: </head>
1495: <body bgcolor="#FFFFFF">
1496: $body
1497: </body>
1498: </html>
1499: SIMPLECONTENT
1500: return $filecontents;
1501: }
1502:
1503: sub createnewsty {
1504: my $filecontents=(<<SIMPLECONTENT);
1505: <definetag name="">
1506: <render>
1507: <web></web>
1508: <tex></tex>
1509: </render>
1510: </definetag>
1511: SIMPLECONTENT
1512: return $filecontents;
1513: }
1514:
1515: sub createnewjs {
1516: my $filecontents=(<<SIMPLECONTENT);
1517: <script type="text/javascript" language="Javascript">
1518:
1519: </script>
1520: SIMPLECONTENT
1521: return $filecontents;
1522: }
1523:
1524: sub verify_html {
1525: my ($filecontents)=@_;
1526: if ($filecontents!~/(?:\<|\<\;)(?:html|xml)[^\<]*(?:\>|\>\;)/is) {
1527: return &mt('File does not have [_1] or [_2] starting tag','<html>','<xml>');
1528: }
1529: if ($filecontents!~/(?:\<|\<\;)\/(?:html|xml)(?:\>|\>\;)/is) {
1530: return &mt('File does not have [_1] or [_2] ending tag','<html>','<xml>');
1531: }
1532: if ($filecontents!~/(?:\<|\<\;)(?:body|frameset)[^\<]*(?:\>|\>\;)/is) {
1533: return &mt('File does not have [_1] or [_2] starting tag','<body>','<frameset>');
1534: }
1535: if ($filecontents!~/(?:\<|\<\;)\/(?:body|frameset)[^\<]*(?:\>|\>\;)/is) {
1536: return &mt('File does not have [_1] or [_2] ending tag','<body>','<frameset>');
1537: }
1538: return '';
1539: }
1540:
1541: sub renderingoptions {
1542: my %langchoices=('' => '');
1543: foreach (&Apache::loncommon::languageids()) {
1544: if (&Apache::loncommon::supportedlanguagecode($_)) {
1545: $langchoices{&Apache::loncommon::supportedlanguagecode($_)}
1546: = &Apache::loncommon::plainlanguagedescription($_);
1547: }
1548: }
1549: return
1550: '<span class="LC_nobreak">'.
1551: &mt('Language:').' '.
1552: &Apache::loncommon::select_form($env{'form.languages'},'languages',
1553: %langchoices).'
1554: </span>
1555: <span class="LC_nobreak">'.
1556: &mt('Math Rendering:').' '.
1557: &Apache::loncommon::select_form($env{'form.texengine'},'texengine',
1558: ('' => '',
1559: 'tth' => 'tth (TeX to HTML)',
1560: 'jsMath' => 'jsMath',
1561: 'mimetex' => 'mimetex (Convert to Images)')).'
1562: </span>';
1563: }
1564:
1565: sub inserteditinfo {
1566: my ($filecontents, $filetype, $filename)=@_;
1567: $filecontents = &HTML::Entities::encode($filecontents,'<>&"');
1568: my $xml_help = '';
1569: my $initialize='';
1570: my $textarea_id = 'filecont';
1571: my $dragmath_button;
1572: my ($add_to_onload, $add_to_onresize);
1573: $initialize=&Apache::lonhtmlcommon::spellheader();
1574: if ($filetype eq 'html'
1575: && (!&Apache::lonhtmlcommon::htmlareablocked() &&
1576: &Apache::lonhtmlcommon::htmlareabrowser())) {
1577: $textarea_id .= '___Frame';
1578: my $lang = &Apache::lonhtmlcommon::htmlarea_lang();
1579: $initialize.=(<<FULLPAGE);
1580: <script type="text/javascript">
1581: lonca
1582: function initDocument() {
1583: var oFCKeditor = new FCKeditor('filecont');
1584: oFCKeditor.Config['CustomConfigurationsPath'] = '/fckeditor/loncapaconfig.js' ;
1585: oFCKeditor.Config['FullPage'] = true
1586: oFCKeditor.Config['AutoDetectLanguage'] = false;
1587: oFCKeditor.Config['DefaultLanguage'] = "$lang";
1588: oFCKeditor.ReplaceTextarea();
1589: }
1590: function check_if_dirty(editor) {
1591: if (editor.IsDirty()) {
1592: unClean();
1593: }
1594: }
1595: function FCKeditor_OnComplete(editor) {
1596: editor.Events.AttachEvent("OnSelectionChange",check_if_dirty);
1597: resize_textarea('$textarea_id','LC_aftertextarea');
1598: }
1599: </script>
1600: FULLPAGE
1601: } else {
1602: $initialize.=(<<FULLPAGE);
1603: <script type="text/javascript">
1604: function initDocument() {
1605: resize_textarea('$textarea_id','LC_aftertextarea');
1606: }
1607: </script>
1608: FULLPAGE
1609: if ($filetype eq 'html') {
1610: $initialize .= "\n".&Apache::lonhtmlcommon::dragmath_js('EditMathPopup');
1611: $dragmath_button = &Apache::lonhtmlcommon::dragmath_button('filecont',1);
1612: }
1613: }
1614:
1615: $add_to_onload = 'initDocument();';
1616: $add_to_onresize = "resize_textarea('$textarea_id','LC_aftertextarea');";
1617:
1618: if ($filetype eq 'html') {
1619: $xml_help=&Apache::loncommon::helpLatexCheatsheet();
1620: }
1621:
1622: my $titledisplay=&display_title();
1623: my %lt=&Apache::lonlocal::texthash('st' => 'Save and Edit',
1624: 'vi' => 'Save and View',
1625: 'dv' => 'Discard Edits and View',
1626: 'un' => 'undo',
1627: 'ed' => 'Edit');
1628: my $spelllink .=&Apache::lonhtmlcommon::spelllink('xmledit','filecont');
1629: my $textarea_events = &Apache::edit::element_change_detection();
1630: my $form_events = &Apache::edit::form_change_detection();
1631: my $htmlerror;
1632: if ($filetype eq 'html') {
1633: $htmlerror=&verify_html($filecontents);
1634: if ($htmlerror) {
1635: $htmlerror='<span class="LC_error">'.$htmlerror.'</span>';
1636: }
1637: }
1638: my $editfooter=(<<ENDFOOTER);
1639: $initialize
1640: <a name="editsection" />
1641: <form $form_events method="post" name="xmledit">
1642: <div class="LC_edit_problem_editxml_header">
1643: <table class="LC_edit_problem_header_title"><tr><td>
1644: $filename
1645: </td><td align="right">
1646: $xml_help
1647: </td></tr>
1648: </table>
1649: <div class="LC_edit_problem_discards">
1650: <input type="submit" name="discardview" accesskey="d" value="$lt{'dv'}" />
1651: <input type="submit" name="Undo" accesskey="u" value="$lt{'un'}" />
1652: $dragmath_button $spelllink $htmlerror
1653: </div>
1654: <div class="LC_edit_problem_saves">
1655: <input type="submit" name="savethisfile" accesskey="s" value="$lt{'st'}" />
1656: <input type="submit" name="viewmode" accesskey="v" value="$lt{'vi'}" />
1657: </div>
1658: </div>
1659: <textarea $textarea_events style="width:100%" cols="80" rows="44" name="filecont" id="filecont">$filecontents</textarea>
1660: <div id="LC_aftertextarea">
1661: <br />
1662: $titledisplay
1663: </div>
1664: </form>
1665: </body>
1666: ENDFOOTER
1667: return ($editfooter,$add_to_onload,$add_to_onresize);;
1668: }
1669:
1670: sub get_target {
1671: my $viewgrades=&Apache::lonnet::allowed('vgr',$env{'request.course.id'});
1672: if ( $env{'request.state'} eq 'published') {
1673: if ( defined($env{'form.grade_target'})
1674: && ($viewgrades == 'F' )) {
1675: return ($env{'form.grade_target'});
1676: } elsif (defined($env{'form.grade_target'})) {
1677: if (($env{'form.grade_target'} eq 'web') ||
1678: ($env{'form.grade_target'} eq 'tex') ) {
1679: return $env{'form.grade_target'}
1680: } else {
1681: return 'web';
1682: }
1683: } else {
1684: return 'web';
1685: }
1686: } elsif ($env{'request.state'} eq 'construct') {
1687: if ( defined($env{'form.grade_target'})) {
1688: return ($env{'form.grade_target'});
1689: } else {
1690: return 'web';
1691: }
1692: } else {
1693: return 'web';
1694: }
1695: }
1696:
1697: sub handler {
1698: my $request=shift;
1699:
1700: my $target=&get_target();
1701: $Apache::lonxml::debug=$env{'user.debug'};
1702:
1703: &Apache::loncommon::content_type($request,'text/html');
1704: &Apache::loncommon::no_cache($request);
1705: if ($env{'request.state'} eq 'published') {
1706: $request->set_last_modified(&Apache::lonnet::metadata($request->uri,
1707: 'lastrevisiondate'));
1708: }
1709: # Embedded Flash movies (e.g., from Camtasia) served from https will not display in IE
1710: # if XML config file has expired from cache.
1711: if ($ENV{'SERVER_PORT'} == 443) {
1712: if ($request->uri =~ /\.xml$/) {
1713: my ($httpbrowser,$clientbrowser) =
1714: &Apache::loncommon::decode_user_agent($request);
1715: if ($clientbrowser =~ /^explorer$/i) {
1716: delete $request->headers_out->{'Cache-control'};
1717: delete $request->headers_out->{'Pragma'};
1718: my $expiration = time + 60;
1719: my $date=strftime("%a, %d %b %Y %H:%M:%S GMT",gmtime($expiration));
1720: $request->headers_out->set("Expires" => $date);
1721: }
1722: }
1723: }
1724: $request->send_http_header;
1725:
1726: return OK if $request->header_only;
1727:
1728:
1729: my $file=&Apache::lonnet::filelocation("",$request->uri);
1730: my $filetype;
1731: if ($file =~ /\.(sty|css|js|txt)$/) {
1732: $filetype=$1;
1733: } else {
1734: $filetype='html';
1735: }
1736:
1737: #
1738: # Edit action? Save file.
1739: #
1740: if (!($env{'request.state'} eq 'published')) {
1741: if ($env{'form.savethisfile'} || $env{'form.viewmode'} || $env{'form.Undo'}) {
1742: my $html_file=&Apache::lonnet::getfile($file);
1743: my $error = &Apache::lonhomework::handle_save_or_undo($request, \$html_file, \$env{'form.filecont'});
1744: if ($env{'form.savethisfile'}) {
1745: $env{'form.editmode'}='Edit'; #force edit mode
1746: }
1747: }
1748: }
1749: my %mystyle;
1750: my $result = '';
1751: my $filecontents=&Apache::lonnet::getfile($file);
1752: if ($filecontents eq -1) {
1753: my $start_page=&Apache::loncommon::start_page('File Error');
1754: my $end_page=&Apache::loncommon::end_page();
1755: my $fnf=&mt('File not found');
1756: $result=(<<ENDNOTFOUND);
1757: $start_page
1758: <b>$fnf: $file</b>
1759: $end_page
1760: ENDNOTFOUND
1761: $filecontents='';
1762: if ($env{'request.state'} ne 'published') {
1763: if ($filetype eq 'sty') {
1764: $filecontents=&createnewsty();
1765: } elsif ($filetype eq 'js') {
1766: $filecontents=&createnewjs();
1767: } elsif (($filetype ne 'css') && ($filetype ne 'txt')) {
1768: $filecontents=&createnewhtml();
1769: }
1770: $env{'form.editmode'}='Edit'; #force edit mode
1771: }
1772: } else {
1773: unless ($env{'request.state'} eq 'published') {
1774: if ($filecontents=~/BEGIN LON-CAPA Internal/) {
1775: &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.'));
1776: }
1777: #
1778: # we are in construction space, see if edit mode forced
1779: &Apache::loncommon::get_unprocessed_cgi($ENV{'QUERY_STRING'},
1780: ['editmode']);
1781: }
1782: if (!$env{'form.editmode'} || $env{'form.viewmode'} || $env{'form.discardview'}) {
1783: if ($filetype eq 'html' || $filetype eq 'sty') {
1784: &Apache::structuretags::reset_problem_globals();
1785: $result = &Apache::lonxml::xmlparse($request,$target,
1786: $filecontents,'',%mystyle);
1787: # .html files may contain <problem> or <Task> need to clean
1788: # up if it did
1789: &Apache::structuretags::reset_problem_globals();
1790: &Apache::lonhomework::finished_parsing();
1791: } else {
1792: $result = $filecontents;
1793: }
1794: &Apache::loncommon::get_unprocessed_cgi($ENV{'QUERY_STRING'},
1795: ['rawmode']);
1796: if ($env{'form.rawmode'}) { $result = $filecontents; }
1797: if ($filetype ne 'html') {
1798: my $nochgview = 1;
1799: my $controls =
1800: ($env{'request.state'} eq 'construct') ? &Apache::londefdef::edit_controls($nochgview)
1801: : '';
1802: if ($filetype ne 'sty') {
1803: $result =~ s/</</g;
1804: $result =~ s/>/>/g;
1805: $result = '<table class="LC_sty_begin">'.
1806: '<tr><td><b><pre>'.$result.
1807: '</pre></b></td></tr></table>';
1808: }
1809: if ($env{'environment.remote'} eq 'off') {
1810: my %options = ('bgcolor' => '#FFFFFF');
1811: $result =
1812: &Apache::loncommon::start_page(undef,undef,\%options).
1813: $controls.
1814: $result.
1815: &Apache::loncommon::end_page();
1816: } else {
1817: $result = $controls.$result;
1818: }
1819: }
1820: }
1821: }
1822:
1823: #
1824: # Edit action? Insert editing commands
1825: #
1826: unless ($env{'request.state'} eq 'published') {
1827: if ($env{'form.editmode'} && (!($env{'form.viewmode'})) && (!($env{'form.discardview'})))
1828: {
1829: my $displayfile=$request->uri;
1830: $displayfile=~s/^\/[^\/]*//;
1831:
1832: my ($edit_info, $add_to_onload, $add_to_onresize)=
1833: &inserteditinfo($filecontents,$filetype,$displayfile);
1834:
1835: my %options =
1836: ('add_entries' =>
1837: {'onresize' => $add_to_onresize,
1838: 'onload' => $add_to_onload, });
1839:
1840: if ($env{'environment.remote'} ne 'off') {
1841: $options{'bgcolor'} = '#FFFFFF';
1842: $options{'only_body'} = 1;
1843: }
1844: my $js =
1845: &Apache::edit::js_change_detection().
1846: &Apache::loncommon::resize_textarea_js();
1847: my $start_page = &Apache::loncommon::start_page(undef,$js,
1848: \%options);
1849: $result=$start_page.
1850: &Apache::lonxml::message_location().
1851: $edit_info.
1852: &Apache::loncommon::end_page();
1853: }
1854: }
1855: if ($filetype eq 'html') { &writeallows($request->uri); }
1856:
1857: &Apache::lonxml::add_messages(\$result);
1858: $request->print($result);
1859:
1860: return OK;
1861: }
1862:
1863: sub display_title {
1864: my $result;
1865: if ($env{'request.state'} eq 'construct') {
1866: my $title=&Apache::lonnet::gettitle();
1867: if (!defined($title) || $title eq '') {
1868: $title = $env{'request.filename'};
1869: $title = substr($title, rindex($title, '/') + 1);
1870: }
1871: $result = "<script type='text/javascript'>top.document.title = '$title - LON-CAPA "
1872: .&mt('Construction Space')."';</script>";
1873: }
1874: return $result;
1875: }
1876:
1877: sub debug {
1878: if ($Apache::lonxml::debug eq "1") {
1879: $|=1;
1880: my $request=$Apache::lonxml::request;
1881: if (!$request) {
1882: eval { $request=Apache->request; };
1883: }
1884: if (!$request) {
1885: eval { $request=Apache2::RequestUtil->request; };
1886: }
1887: $request->print('<font size="-2"><pre>DEBUG:'.&HTML::Entities::encode($_[0],'<>&"')."</pre></font>\n");
1888: #&Apache::lonnet::logthis($_[0]);
1889: }
1890: }
1891:
1892: sub show_error_warn_msg {
1893: if ($env{'request.filename'} eq '/home/httpd/html/res/lib/templates/simpleproblem.problem' &&
1894: &Apache::lonnet::allowed('mdc',$env{'request.course.id'})) {
1895: return 1;
1896: }
1897: return (($Apache::lonxml::debug eq 1) ||
1898: ($env{'request.state'} eq 'construct') ||
1899: ($Apache::lonhomework::browse eq 'F'
1900: &&
1901: $env{'form.show_errors'} eq 'on'));
1902: }
1903:
1904: sub error {
1905: my @errors = @_;
1906:
1907: $errorcount++;
1908:
1909: $Apache::lonxml::internal_error=1;
1910:
1911: if (defined($Apache::inputtags::part)) {
1912: if ( @Apache::inputtags::response ) {
1913: push(@errors,
1914: &mt("This error occurred while processing response [_1] in part [_2]",
1915: $Apache::inputtags::response[-1],
1916: $Apache::inputtags::part));
1917: } else {
1918: push(@errors,
1919: &mt("This error occurred while processing part [_1]",
1920: $Apache::inputtags::part));
1921: }
1922: }
1923:
1924: if ( &show_error_warn_msg() ) {
1925: # If printing in construction space, put the error inside <pre></pre>
1926: push(@Apache::lonxml::error_messages,
1927: $Apache::lonxml::warnings_error_header
1928: .'<div class="LC_error">'
1929: .'<b>'.&mt('ERROR:').' </b>'.join("<br />\n",@errors)
1930: ."</div>\n");
1931: $Apache::lonxml::warnings_error_header='';
1932: } else {
1933: my $errormsg;
1934: my ($symb)=&Apache::lonnet::symbread();
1935: if ( !$symb ) {
1936: #public or browsers
1937: $errormsg=&mt("An error occurred while processing this resource. The author has been notified.");
1938: }
1939: my $host=$Apache::lonnet::perlvar{'lonHostID'};
1940: push(@errors,
1941: &mt("The error occurred on host [_1]",
1942: "<tt>$host</tt>"));
1943:
1944: my $msg = join('<br />', @errors);
1945:
1946: #notify author
1947: &Apache::lonmsg::author_res_msg($env{'request.filename'},$msg);
1948: #notify course
1949: if ( $symb && $env{'request.course.id'} ) {
1950: my $cnum=$env{'course.'.$env{'request.course.id'}.'.num'};
1951: my $cdom=$env{'course.'.$env{'request.course.id'}.'.domain'};
1952: my (undef,%users)=&Apache::lonmsg::decide_receiver(undef,0,1,1,1);
1953: my $declutter=&Apache::lonnet::declutter($env{'request.filename'});
1954: my $baseurl = &Apache::lonnet::clutter($declutter);
1955: my @userlist;
1956: foreach (keys %users) {
1957: my ($user,$domain) = split(/:/, $_);
1958: push(@userlist,"$user\@$domain");
1959: my $key=$declutter.'_'.$user.'_'.$domain;
1960: my %lastnotified=&Apache::lonnet::get('nohist_xmlerrornotifications',
1961: [$key],
1962: $cdom,$cnum);
1963: my $now=time;
1964: if ($now-$lastnotified{$key}>86400) {
1965: my $title = &Apache::lonnet::gettitle($symb);
1966: my $sentmessage;
1967: &Apache::lonmsg::user_normal_msg($user,$domain,
1968: "Error [$title]",$msg,'',$baseurl,'','',
1969: \$sentmessage,$symb,$title,1);
1970: &Apache::lonnet::put('nohist_xmlerrornotifications',
1971: {$key => $now},
1972: $cdom,$cnum);
1973: }
1974: }
1975: if ($env{'request.role.adv'}) {
1976: $errormsg=&mt("An error occurred while processing this resource. The course personnel ([_1]) and the author have been notified.",join(', ',@userlist));
1977: } else {
1978: $errormsg=&mt("An error occurred while processing this resource. The instructor has been notified.");
1979: }
1980: }
1981: push(@Apache::lonxml::error_messages,"<b>$errormsg</b> <br />");
1982: }
1983: }
1984:
1985: sub warning {
1986: $warningcount++;
1987:
1988: if ($env{'form.grade_target'} ne 'tex') {
1989: if ( &show_error_warn_msg() ) {
1990: push(@Apache::lonxml::warning_messages,
1991: $Apache::lonxml::warnings_error_header
1992: .'<div class="LC_warning">'
1993: .&mt('[_1]W[_2]ARNING','<b>','</b>')."<b>:</b> ".join('<br />',@_)
1994: ."</div>\n"
1995: );
1996: $Apache::lonxml::warnings_error_header='';
1997: }
1998: }
1999: }
2000:
2001: sub info {
2002: if ($env{'form.grade_target'} ne 'tex'
2003: && $env{'request.state'} eq 'construct') {
2004: push(@Apache::lonxml::info_messages,join('<br />',@_)."<br />\n");
2005: }
2006: }
2007:
2008: sub message_location {
2009: return '__LONCAPA_INTERNAL_MESSAGE_LOCATION__';
2010: }
2011:
2012: sub add_messages {
2013: my ($msg)=@_;
2014: my $result=join(' ',
2015: @Apache::lonxml::info_messages,
2016: @Apache::lonxml::error_messages,
2017: @Apache::lonxml::warning_messages);
2018: undef(@Apache::lonxml::info_messages);
2019: undef(@Apache::lonxml::error_messages);
2020: undef(@Apache::lonxml::warning_messages);
2021: $$msg=~s/__LONCAPA_INTERNAL_MESSAGE_LOCATION__/$result/;
2022: $$msg=~s/__LONCAPA_INTERNAL_MESSAGE_LOCATION__//g;
2023: }
2024:
2025: sub get_param {
2026: my ($param,$parstack,$safeeval,$context,$case_insensitive) = @_;
2027: if ( ! $context ) { $context = -1; }
2028: my $args ='';
2029: if ( $#$parstack > (-2-$context) ) { $args=$$parstack[$context]; }
2030: if ( ! $Apache::lonxml::usestyle ) {
2031: $args=$Apache::lonxml::style_values.$args;
2032: }
2033: if ( ! $args ) { return undef; }
2034: if ( $case_insensitive ) {
2035: if ($args =~ s/(my (?:.*))(\$\Q$param\E[,\)])/$1.lc($2)/ei) {
2036: return &Apache::run::run("{$args;".'return $'.$param.'}',
2037: $safeeval); #'
2038: } else {
2039: return undef;
2040: }
2041: } else {
2042: if ( $args =~ /my .*\$\Q$param\E[,\)]/ ) {
2043: return &Apache::run::run("{$args;".'return $'.$param.'}',
2044: $safeeval); #'
2045: } else {
2046: return undef;
2047: }
2048: }
2049: }
2050:
2051: sub get_param_var {
2052: my ($param,$parstack,$safeeval,$context,$case_insensitive) = @_;
2053: if ( ! $context ) { $context = -1; }
2054: my $args ='';
2055: if ( $#$parstack > (-2-$context) ) { $args=$$parstack[$context]; }
2056: if ( ! $Apache::lonxml::usestyle ) {
2057: $args=$Apache::lonxml::style_values.$args;
2058: }
2059: &Apache::lonxml::debug("Args are $args param is $param");
2060: if ($case_insensitive) {
2061: if (! ($args=~s/(my (?:.*))(\$\Q$param\E[,\)])/$1.lc($2)/ei)) {
2062: return undef;
2063: }
2064: } elsif ( $args !~ /my .*\$\Q$param\E[,\)]/ ) { return undef; }
2065: my $value=&Apache::run::run("{$args;".'return $'.$param.'}',$safeeval); #'
2066: &Apache::lonxml::debug("first run is $value");
2067: if ($value =~ /^[\$\@\%][a-zA-Z_]\w*$/) {
2068: &Apache::lonxml::debug("doing second");
2069: my @result=&Apache::run::run("return $value",$safeeval,1);
2070: if (!defined($result[0])) {
2071: return $value
2072: } else {
2073: if (wantarray) { return @result; } else { return $result[0]; }
2074: }
2075: } else {
2076: return $value;
2077: }
2078: }
2079:
2080: sub register_insert_xml {
2081: my $parser = HTML::LCParser->new($Apache::lonnet::perlvar{'lonTabDir'}
2082: .'/insertlist.xml');
2083: my ($tagnum,$in_help)=(0,0);
2084: my @alltags;
2085: my $tag;
2086: while (my $token = $parser->get_token()) {
2087: if ($token->[0] eq 'S') {
2088: my $key;
2089: if ($token->[1] eq 'tag') {
2090: $tag = $token->[2]{'name'};
2091: $insertlist{"$tagnum.tag"} = $tag;
2092: $insertlist{"$tag.num"} = $tagnum;
2093: push(@alltags,$tag);
2094: } elsif ($in_help && $token->[1] eq 'file') {
2095: $key = $tag.'.helpfile';
2096: } elsif ($in_help && $token->[1] eq 'description') {
2097: $key = $tag.'.helpdesc';
2098: } elsif ($token->[1] eq 'description' ||
2099: $token->[1] eq 'color' ||
2100: $token->[1] eq 'show' ) {
2101: $key = $tag.'.'.$token->[1];
2102: } elsif ($token->[1] eq 'insert_sub') {
2103: $key = $tag.'.function';
2104: } elsif ($token->[1] eq 'help') {
2105: $in_help=1;
2106: } elsif ($token->[1] eq 'allow') {
2107: $key = $tag.'.allow';
2108: }
2109: if (defined($key)) {
2110: $insertlist{$key} = $parser->get_text();
2111: $insertlist{$key} =~ s/(^\s*|\s*$ )//gx;
2112: }
2113: } elsif ($token->[0] eq 'E') {
2114: if ($token->[1] eq 'tag') {
2115: undef($tag);
2116: $tagnum++;
2117: } elsif ($token->[1] eq 'help') {
2118: undef($in_help);
2119: }
2120: }
2121: }
2122:
2123: # parse the allows and ignore tags set to <show>no</show>
2124: foreach my $tag (@alltags) {
2125: next if (!exists($insertlist{"$tag.allow"}));
2126: my $allow = $insertlist{"$tag.allow"};
2127: foreach my $element (split(',',$allow)) {
2128: $element =~ s/(^\s*|\s*$ )//gx;
2129: if (!exists($insertlist{"$element.show"})
2130: || $insertlist{"$element.show"} ne 'no') {
2131: push(@{ $insertlist{$tag.'.which'} },$element);
2132: }
2133: }
2134: }
2135: }
2136:
2137: sub register_insert {
2138: return ®ister_insert_xml(@_);
2139: # &dump_insertlist('2');
2140: }
2141:
2142: sub dump_insertlist {
2143: my ($ext) = @_;
2144: open(XML,">/tmp/insertlist.xml.$ext");
2145: print XML ("<insertlist>");
2146: my $i=0;
2147:
2148: while (exists($insertlist{"$i.tag"})) {
2149: my $tag = $insertlist{"$i.tag"};
2150: print XML ("
2151: \t<tag name=\"$tag\">");
2152: if (defined($insertlist{"$tag.description"})) {
2153: print XML ("
2154: \t\t<description>".$insertlist{"$tag.description"}."</description>");
2155: }
2156: if (defined($insertlist{"$tag.color"})) {
2157: print XML ("
2158: \t\t<color>".$insertlist{"$tag.color"}."</color>");
2159: }
2160: if (defined($insertlist{"$tag.function"})) {
2161: print XML ("
2162: \t\t<insert_sub>".$insertlist{"$tag.function"}."</insert_sub>");
2163: }
2164: if (defined($insertlist{"$tag.show"})
2165: && $insertlist{"$tag.show"} ne 'yes') {
2166: print XML ("
2167: \t\t<show>".$insertlist{"$tag.show"}."</show>");
2168: }
2169: if (defined($insertlist{"$tag.helpfile"})) {
2170: print XML ("
2171: \t\t<help>
2172: \t\t\t<file>".$insertlist{"$tag.helpfile"}."</file>");
2173: if ($insertlist{"$tag.helpdesc"} ne '') {
2174: print XML ("
2175: \t\t\t<description>".$insertlist{"$tag.helpdesc"}."</description>");
2176: }
2177: print XML ("
2178: \t\t</help>");
2179: }
2180: if (defined($insertlist{"$tag.which"})) {
2181: print XML ("
2182: \t\t<allow>".join(',',sort(@{ $insertlist{"$tag.which"} }))."</allow>");
2183: }
2184: print XML ("
2185: \t</tag>");
2186: $i++;
2187: }
2188: print XML ("\n</insertlist>\n");
2189: close(XML);
2190: }
2191:
2192: sub description {
2193: my ($token)=@_;
2194: my $tag = &get_tag($token);
2195: return $insertlist{$tag.'.description'};
2196: }
2197:
2198: # Returns a list containing the help file, and the description
2199: sub helpinfo {
2200: my ($token)=@_;
2201: my $tag = &get_tag($token);
2202: return ($insertlist{$tag.'.helpfile'}, $insertlist{$tag.'.helpdesc'});
2203: }
2204:
2205: sub get_tag {
2206: my ($token)=@_;
2207: my $tagnum;
2208: my $tag=$token->[1];
2209: foreach my $namespace (reverse(@Apache::lonxml::namespace)) {
2210: my $testtag = $namespace.'::'.$tag;
2211: $tagnum = $insertlist{"$testtag.num"};
2212: last if (defined($tagnum));
2213: }
2214: if (!defined($tagnum)) {
2215: $tagnum = $Apache::lonxml::insertlist{"$tag.num"};
2216: }
2217: return $insertlist{"$tagnum.tag"};
2218: }
2219:
2220: ############################################################
2221: # PDF-FORM-METHODS
2222:
2223: =pod
2224:
2225: =item &print_pdf_radiobutton(fieldname, value, text)
2226:
2227: Returns a latexline to generate a PDF-Form-Radiobutton with Text.
2228:
2229: $fieldname: PDF internalname of the radiobutton
2230: $value: Value of radiobutton (read when dumping the PDF data)
2231: $text: Text on the rightside of the radiobutton
2232:
2233: =cut
2234: sub print_pdf_radiobutton {
2235: my $result = '';
2236: my ($fieldName, $value, $text) = @_;
2237: $result .= '\begin{tabularx}{\textwidth}{p{0cm}X}'."\n";
2238: $result .= '\radioButton[\symbolchoice{circle}]{'.
2239: $fieldName.'}{10bp}{10bp}{'.$value.'}&'.$text."\n";
2240: $result .= '\end{tabularx}' . "\n";
2241: $result .= '\hspace{2mm}' . "\n";
2242: return $result;
2243: }
2244:
2245:
2246: =pod
2247:
2248: =item &print_pdf_start_combobox(fieldname)
2249:
2250: Starts a latexline to generate a PDF-Form-Combobox with text.
2251:
2252: $fieldname: PDF internal name of the Combobox
2253:
2254: =cut
2255: sub print_pdf_start_combobox {
2256: my $result;
2257: my ($fieldName) = @_;
2258: $result .= '\begin{tabularx}{\textwidth}{p{2.5cm}X}'."\n";
2259: $result .= '\comboBox[]{'.$fieldName.'}{2.3cm}{14bp}{'; #
2260:
2261: return $result;
2262: }
2263:
2264:
2265: =pod
2266:
2267: =item &print_pdf_add_combobox_option(options)
2268:
2269: Generates a latexline to add Options to a PDF-Form-ComboBox.
2270:
2271: $option: PDF internal name of the Combobox-Option
2272:
2273: =cut
2274: sub print_pdf_add_combobox_option {
2275:
2276: my $result;
2277: my ($option) = @_;
2278:
2279: $result .= '('.$option.')';
2280:
2281: return $result;
2282: }
2283:
2284:
2285: =pod
2286:
2287: =item &print_pdf_end_combobox(text) {
2288:
2289: Returns latexcode to end a PDF-Form-Combobox with text.
2290:
2291: =cut
2292: sub print_pdf_end_combobox {
2293: my $result;
2294: my ($text) = @_;
2295:
2296: $result .= '}&'.$text."\\\\\n";
2297: $result .= '\end{tabularx}' . "\n";
2298: $result .= '\hspace{2mm}' . "\n";
2299: return $result;
2300: }
2301:
2302:
2303: =pod
2304:
2305: =item &print_pdf_hiddenField(fieldname, user, domain)
2306:
2307: Returns a latexline to generate a PDF-Form-hiddenField with userdata.
2308:
2309: $fieldname label for hiddentextfield
2310: $user: name of user
2311: $domain: domain of user
2312:
2313: =cut
2314: sub print_pdf_hiddenfield {
2315: my $result;
2316: my ($fieldname, $user, $domain) = @_;
2317:
2318: $result .= '\textField [\F{\FHidden}\F{-\FPrint}\V{'.$domain.'&'.$user.'}]{'.$fieldname.'}{0in}{0in}'."\n";
2319:
2320: return $result;
2321: }
2322:
2323: 1;
2324: __END__
2325:
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