1: # The LearningOnline Network with CAPA
2: # XML Parser Module
3: #
4: # $Id: lonxml.pm,v 1.489 2008/11/24 17:17:52 jms 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::lonlocal;
113:
114: #==================================== Main subroutine: xmlparse
115:
116: #debugging control, to turn on debugging modify the correct handler
117:
118: $Apache::lonxml::debug=0;
119:
120: # keeps count of the number of warnings and errors generated in a parse
121: $warningcount=0;
122: $errorcount=0;
123:
124: #path to the directory containing the file currently being processed
125: @pwd=();
126:
127: #these two are used for capturing a subset of the output for later processing,
128: #don't touch them directly use &startredirection and &endredirection
129: @outputstack = ();
130: $redirection = 0;
131:
132: #controls wheter the <import> tag actually does
133: $import = 1;
134: @extlinks=();
135:
136: # meta mode is a bit weird only some output is to be turned off
137: #<output> tag turns metamode off (defined in londefdef.pm)
138: $metamode = 0;
139:
140: # turns on and of run::evaluate actually derefencing var refs
141: $evaluate = 1;
142:
143: # data structure for eidt mode, determines what tags can go into what other tags
144: %insertlist=();
145:
146: # stores the list of active tag namespaces
147: @namespace=();
148:
149: # stores all Scrit Vars displays for later showing
150: my @script_var_displays=();
151:
152: # a pointer the the Apache request object
153: $Apache::lonxml::request='';
154:
155: # a problem number counter, and check on ether it is used
156: $Apache::lonxml::counter=1;
157: $Apache::lonxml::counter_changed=0;
158:
159: # Part counter hash. In analysis mode, the
160: # problems can use this to record which parts increment the counter
161: # by how much. The counter subs will maintain this hash via
162: # their optional part parameters. Note that the assumption is that
163: # analysis is done in one request and therefore it is not necessary to
164: # save this information request-to-request.
165:
166:
167: %Apache::lonxml::counters_per_part = ();
168:
169: #internal check on whether to look at style defs
170: $Apache::lonxml::usestyle=1;
171:
172: #locations used to store the parameter string for style substitutions
173: $Apache::lonxml::style_values='';
174: $Apache::lonxml::style_end_values='';
175:
176: #array of ssi calls that need to occur after we are done parsing
177: @Apache::lonxml::ssi_info=();
178:
179: #should we do the postag variable interpolation
180: $Apache::lonxml::post_evaluate=1;
181:
182: #a header message to emit in the case of any generated warning or errors
183: $Apache::lonxml::warnings_error_header='';
184:
185: # Control whether or not LaTeX symbols should be substituted for their
186: # \ style equivalents...this may be turned off e.g. in an verbatim
187: # environment.
188:
189: $Apache::lonxml::substitute_LaTeX_symbols = 1; # Starts out on.
190:
191: sub enable_LaTeX_substitutions {
192: $Apache::lonxml::substitute_LaTeX_symbols = 1;
193: }
194: sub disable_LaTeX_substitutions {
195: $Apache::lonxml::substitute_LaTeX_symbols = 0;
196: }
197:
198: sub xmlend {
199: my ($target,$parser)=@_;
200: my $mode='xml';
201: my $status='OPEN';
202: if ($Apache::lonhomework::parsing_a_problem ||
203: $Apache::lonhomework::parsing_a_task ) {
204: $mode='problem';
205: $status=$Apache::inputtags::status[-1];
206: }
207: my $discussion;
208: &Apache::loncommon::get_unprocessed_cgi($ENV{'QUERY_STRING'},
209: ['LONCAPA_INTERNAL_no_discussion']);
210: if (! exists($env{'form.LONCAPA_INTERNAL_no_discussion'}) ||
211: $env{'form.LONCAPA_INTERNAL_no_discussion'} ne 'true') {
212: $discussion=&Apache::lonfeedback::list_discussion($mode,$status);
213: }
214: if ($target eq 'tex') {
215: $discussion.='<tex>\keephidden{ENDOFPROBLEM}\vskip 0.5mm\noindent\makebox[\textwidth/$number_of_columns][b]{\hrulefill}\end{document}</tex>';
216: &Apache::lonxml::newparser($parser,\$discussion,'');
217: return '';
218: }
219:
220: return $discussion;
221: }
222:
223: sub tokeninputfield {
224: my $defhost=$Apache::lonnet::perlvar{'lonHostID'};
225: $defhost=~tr/a-z/A-Z/;
226: return (<<ENDINPUTFIELD)
227: <script type="text/javascript">
228: function updatetoken() {
229: var comp=new Array;
230: var barcode=unescape(document.tokeninput.barcode.value);
231: comp=barcode.split('*');
232: if (typeof(comp[0])!="undefined") {
233: document.tokeninput.codeone.value=comp[0];
234: }
235: if (typeof(comp[1])!="undefined") {
236: document.tokeninput.codetwo.value=comp[1];
237: }
238: if (typeof(comp[2])!="undefined") {
239: comp[2]=comp[2].toUpperCase();
240: document.tokeninput.codethree.value=comp[2];
241: }
242: document.tokeninput.barcode.value='';
243: }
244: </script>
245: <form method="post" name="tokeninput">
246: <table border="2" bgcolor="#FFFFBB">
247: <tr><th>DocID Checkin</th></tr>
248: <tr><td>
249: <table>
250: <tr>
251: <td>Scan in Barcode</td>
252: <td><input type="text" size="22" name="barcode"
253: onChange="updatetoken()"/></td>
254: </tr>
255: <tr><td><i>or</i> Type in DocID</td>
256: <td>
257: <input type="text" size="5" name="codeone" />
258: <b><font size="+2">*</font></b>
259: <input type="text" size="5" name="codetwo" />
260: <b><font size="+2">*</font></b>
261: <input type="text" size="10" name="codethree" value="$defhost"
262: onChange="this.value=this.value.toUpperCase()" />
263: </td></tr>
264: </table>
265: </td></tr>
266: <tr><td><input type="submit" value="Check in DocID" /></td></tr>
267: </table>
268: </form>
269: ENDINPUTFIELD
270: }
271:
272: sub maketoken {
273: my ($symb,$tuname,$tudom,$tcrsid)=@_;
274: unless ($symb) {
275: $symb=&Apache::lonnet::symbread();
276: }
277: unless ($tuname) {
278: $tuname=$env{'user.name'};
279: $tudom=$env{'user.domain'};
280: $tcrsid=$env{'request.course.id'};
281: }
282:
283: return &Apache::lonnet::checkout($symb,$tuname,$tudom,$tcrsid);
284: }
285:
286: sub printtokenheader {
287: my ($target,$token,$tsymb,$tcrsid,$tudom,$tuname)=@_;
288: unless ($token) { return ''; }
289:
290: my ($symb,$courseid,$domain,$name) = &Apache::lonnet::whichuser();
291: unless ($tsymb) {
292: $tsymb=$symb;
293: }
294: unless ($tuname) {
295: $tuname=$name;
296: $tudom=$domain;
297: $tcrsid=$courseid;
298: }
299:
300: my $plainname=&Apache::loncommon::plainname($tuname,$tudom);
301:
302: if ($target eq 'web') {
303: my %idhash=&Apache::lonnet::idrget($tudom,($tuname));
304: return
305: '<img align="right" src="/cgi-bin/barcode.png?encode='.$token.'" />'.
306: &mt('Checked out for').' '.$plainname.
307: '<br />'.&mt('User').': '.$tuname.' at '.$tudom.
308: '<br />'.&mt('ID').': '.$idhash{$tuname}.
309: '<br />'.&mt('CourseID').': '.$tcrsid.
310: '<br />'.&mt('Course').': '.$env{'course.'.$tcrsid.'.description'}.
311: '<br />'.&mt('DocID').': '.$token.
312: '<br />'.&mt('Time').': '.&Apache::lonlocal::locallocaltime().'<hr />';
313: } else {
314: return $token;
315: }
316: }
317:
318: sub printalltags {
319: my $temp;
320: foreach $temp (sort keys %Apache::lonxml::alltags) {
321: &Apache::lonxml::debug("$temp -- ".
322: join(',',@{ $Apache::lonxml::alltags{$temp} }));
323: }
324: }
325:
326: sub xmlparse {
327: my ($request,$target,$content_file_string,$safeinit,%style_for_target) = @_;
328:
329: &setup_globals($request,$target);
330: &Apache::inputtags::initialize_inputtags();
331: &Apache::bridgetask::initialize_bridgetask();
332: &Apache::outputtags::initialize_outputtags();
333: &Apache::edit::initialize_edit();
334: &Apache::londefdef::initialize_londefdef();
335:
336: #
337: # do we have a course style file?
338: #
339:
340: if ($env{'request.course.id'} && $env{'request.state'} ne 'construct') {
341: my $bodytext=
342: $env{'course.'.$env{'request.course.id'}.'.default_xml_style'};
343: if ($bodytext) {
344: foreach my $file (split(',',$bodytext)) {
345: my $location=&Apache::lonnet::filelocation('',$file);
346: my $styletext=&Apache::lonnet::getfile($location);
347: if ($styletext ne '-1') {
348: %style_for_target = (%style_for_target,
349: &Apache::style::styleparser($target,$styletext));
350: }
351: }
352: }
353: } elsif ($env{'construct.style'}
354: && ($env{'request.state'} eq 'construct')) {
355: my $location=&Apache::lonnet::filelocation('',$env{'construct.style'});
356: my $styletext=&Apache::lonnet::getfile($location);
357: if ($styletext ne '-1') {
358: %style_for_target = (%style_for_target,
359: &Apache::style::styleparser($target,$styletext));
360: }
361: }
362: #&printalltags();
363: my @pars = ();
364: my $pwd=$env{'request.filename'};
365: $pwd =~ s:/[^/]*$::;
366: &newparser(\@pars,\$content_file_string,$pwd);
367:
368: my $safeeval = new Safe;
369: my $safehole = new Safe::Hole;
370: &init_safespace($target,$safeeval,$safehole,$safeinit);
371: #-------------------- Redefinition of the target in the case of compound target
372:
373: ($target, my @tenta) = split('&&',$target);
374:
375: my @stack = ();
376: my @parstack = ();
377: &initdepth();
378: &init_alarm();
379: my $finaloutput = &inner_xmlparse($target,\@stack,\@parstack,\@pars,
380: $safeeval,\%style_for_target,1);
381:
382: if (@stack) {
383: &warning(&mt('At end of file some tags were still left unclosed:').
384: ' <tt><'.join('></tt>, <tt><',reverse(@stack)).
385: '></tt>');
386: }
387: if ($env{'request.uri'}) {
388: &writeallows($env{'request.uri'});
389: }
390: &do_registered_ssi();
391: if ($Apache::lonxml::counter_changed) { &store_counter() }
392:
393: &clean_safespace($safeeval);
394:
395: if (@script_var_displays) {
396: $finaloutput .= join('',@script_var_displays);
397: undef(@script_var_displays);
398: }
399: &init_state();
400: if ($env{'form.return_only_error_and_warning_counts'}) {
401: if ($env{'request.filename'}=~/\.(html|htm|xml)$/i) {
402: my $error=&verify_html($content_file_string);
403: if ($error) { $errorcount++; }
404: }
405: return "$errorcount:$warningcount";
406: }
407: return $finaloutput;
408: }
409:
410: sub latex_special_symbols {
411: my ($string,$where)=@_;
412: #
413: # If e.g. in verbatim mode, then don't substitute.
414: # but return original string.
415: #
416: if (!($Apache::lonxml::substitute_LaTeX_symbols)) {
417: return $string;
418: }
419: if ($where eq 'header') {
420: $string =~ s/\\/\$\\backslash\$/g; # \ -> $\backslash$ per LaTex line by line pg 10.
421: $string =~ s/(\$|%|\{|\})/\\$1/g;
422: $string=&Apache::lonprintout::character_chart($string);
423: # any & or # leftover should be safe to just escape
424: $string=~s/([^\\])\&/$1\\\&/g;
425: $string=~s/([^\\])\#/$1\\\#/g;
426: $string =~ s/_/\\_/g; # _ -> \_
427: $string =~ s/\^/\\\^{}/g; # ^ -> \^{}
428: } else {
429: $string=~s/\\/\\ensuremath{\\backslash}/g;
430: $string=~s/\\\%|\%/\\\%/g;
431: $string=~s/\\{|{/\\{/g;
432: $string=~s/\\}|}/\\}/g;
433: $string=~s/\\ensuremath\\{\\backslash\\}/\\ensuremath{\\backslash}/g;
434: $string=~s/\\\$|\$/\\\$/g;
435: $string=~s/\\\_|\_/\\\_/g;
436: $string=~s/([^\\]|^)(\~|\^)/$1\\$2\\strut /g;
437: $string=~s/(>|<)/\\ensuremath\{$1\}/g; #more or less
438: $string=&Apache::lonprintout::character_chart($string);
439: # any & or # leftover should be safe to just escape
440: $string=~s/\\\&|\&/\\\&/g;
441: $string=~s/\\\#|\#/\\\#/g;
442: $string=~s/\|/\$\\mid\$/g;
443: #single { or } How to escape?
444: }
445: return $string;
446: }
447:
448: sub inner_xmlparse {
449: my ($target,$stack,$parstack,$pars,$safeeval,$style_for_target,$start)=@_;
450: my $finaloutput = '';
451: my $result;
452: my $token;
453: my $dontpop=0;
454: my $startredirection = $Apache::lonxml::redirection;
455: while ( $#$pars > -1 ) {
456: while ($token = $$pars['-1']->get_token) {
457: if (($token->[0] eq 'T') || ($token->[0] eq 'C') ) {
458: if ($metamode<1) {
459: my $text=$token->[1];
460: if ($token->[0] eq 'C' && $target eq 'tex') {
461: $text = '';
462: # $text = '%'.$text."\n";
463: }
464: $result.=$text;
465: }
466: } elsif (($token->[0] eq 'D')) {
467: if ($metamode<1 && $target eq 'web') {
468: my $text=$token->[1];
469: $result.=$text;
470: }
471: } elsif ($token->[0] eq 'PI') {
472: if ($metamode<1 && $target eq 'web') {
473: $result=$token->[2];
474: }
475: } elsif ($token->[0] eq 'S') {
476: # add tag to stack
477: push (@$stack,$token->[1]);
478: # add parameters list to another stack
479: push (@$parstack,&parstring($token));
480: &increasedepth($token);
481: if ($Apache::lonxml::usestyle &&
482: exists($$style_for_target{$token->[1]})) {
483: $Apache::lonxml::usestyle=0;
484: my $string=$$style_for_target{$token->[1]}.
485: '<LONCAPA_INTERNAL_TURN_STYLE_ON />';
486: &Apache::lonxml::newparser($pars,\$string);
487: $Apache::lonxml::style_values=$$parstack[-1];
488: $Apache::lonxml::style_end_values=$$parstack[-1];
489: } else {
490: $result = &callsub("start_$token->[1]", $target, $token, $stack,
491: $parstack, $pars, $safeeval, $style_for_target);
492: }
493: } elsif ($token->[0] eq 'E') {
494: if ($Apache::lonxml::usestyle &&
495: exists($$style_for_target{'/'."$token->[1]"})) {
496: $Apache::lonxml::usestyle=0;
497: my $string=$$style_for_target{'/'.$token->[1]}.
498: '<LONCAPA_INTERNAL_TURN_STYLE_ON end="'.$token->[1].'" />';
499: &Apache::lonxml::newparser($pars,\$string);
500: $Apache::lonxml::style_values=$Apache::lonxml::style_end_values;
501: $Apache::lonxml::style_end_values='';
502: $dontpop=1;
503: } else {
504: #clear out any tags that didn't end
505: while ($token->[1] ne $$stack['-1'] && ($#$stack > -1)) {
506: my $lasttag=$$stack[-1];
507: if ($token->[1] =~ /^\Q$lasttag\E$/i) {
508: &Apache::lonxml::warning(&mt('Using tag [_1] on line [_2] as end tag to [_3]','</'.$token->[1].'>','.$token->[3].','<'.$$stack[-1].'>'));
509: last;
510: } else {
511: &Apache::lonxml::warning(&mt('Found tag [_1] on line [_2] when looking for [_3] in file.','</'.$token->[1].'>',$token->[3],'</'.$$stack[-1].'>'));
512: &end_tag($stack,$parstack,$token);
513: }
514: }
515: $result = &callsub("end_$token->[1]", $target, $token, $stack,
516: $parstack, $pars,$safeeval, $style_for_target);
517: }
518: } else {
519: &Apache::lonxml::error("Unknown token event :$token->[0]:$token->[1]:");
520: }
521: #evaluate variable refs in result
522: if ($Apache::lonxml::post_evaluate &&$result ne "") {
523: my $extras;
524: if (!$Apache::lonxml::usestyle) {
525: $extras=$Apache::lonxml::style_values;
526: }
527: if ( $#$parstack > -1 ) {
528: $result=&Apache::run::evaluate($result,$safeeval,$extras.$$parstack[-1]);
529: } else {
530: $result= &Apache::run::evaluate($result,$safeeval,$extras);
531: }
532: }
533: $Apache::lonxml::post_evaluate=1;
534:
535: if (($token->[0] eq 'T') || ($token->[0] eq 'C') || ($token->[0] eq 'D') ) {
536: #Style file definitions should be correct
537: if ($target eq 'tex' && ($Apache::lonxml::usestyle)) {
538: $result=&latex_special_symbols($result);
539: }
540: }
541:
542: if ($Apache::lonxml::redirection) {
543: $Apache::lonxml::outputstack['-1'] .= $result;
544: } else {
545: $finaloutput.=$result;
546: }
547: $result = '';
548:
549: if ($token->[0] eq 'E' && !$dontpop) {
550: &end_tag($stack,$parstack,$token);
551: }
552: $dontpop=0;
553: }
554: if ($#$pars > -1) {
555: pop @$pars;
556: pop @Apache::lonxml::pwd;
557: }
558: }
559:
560: # if ($target eq 'meta') {
561: # $finaloutput.=&endredirection;
562: # }
563:
564: if ( $start && $target eq 'grade') { &endredirection(); }
565: if ( $Apache::lonxml::redirection > $startredirection) {
566: while ($Apache::lonxml::redirection > $startredirection) {
567: $finaloutput .= &endredirection();
568: }
569: }
570: if (($ENV{'QUERY_STRING'}) && ($target eq 'web')) {
571: $finaloutput=&afterburn($finaloutput);
572: }
573: return $finaloutput;
574: }
575:
576: ##
577: ## Looks to see if there is a subroutine defined for this tag. If so, call it,
578: ## otherwise do not call it as we do not know what it is.
579: ##
580: sub callsub {
581: my ($sub,$target,$token,$tagstack,$parstack,$parser,$safeeval,$style)=@_;
582: my $currentstring='';
583: my $nodefault;
584: {
585: my $sub1;
586: no strict 'refs';
587: my $tag=$token->[1];
588: # get utterly rid of extended html tags
589: if ($tag=~/^x\-/i) { return ''; }
590: my $space=$Apache::lonxml::alltags{$tag}[-1];
591: if (!$space) {
592: $tag=~tr/A-Z/a-z/;
593: $sub=~tr/A-Z/a-z/;
594: $space=$Apache::lonxml::alltags{$tag}[-1]
595: }
596:
597: my $deleted=0;
598: if (($token->[0] eq 'S') && ($target eq 'modified')) {
599: $deleted=&Apache::edit::handle_delete($space,$target,$token,$tagstack,
600: $parstack,$parser,$safeeval,
601: $style);
602: }
603: if (!$deleted) {
604: if ($space) {
605: #&Apache::lonxml::debug("Calling sub $sub in $space $metamode");
606: $sub1="$space\:\:$sub";
607: ($currentstring,$nodefault) = &$sub1($target,$token,$tagstack,
608: $parstack,$parser,$safeeval,
609: $style);
610: } else {
611: if ($target eq 'tex') {
612: # throw away tag name
613: return '';
614: }
615: #&Apache::lonxml::debug("NOT Calling sub $sub in $space $metamode");
616: if ($metamode <1) {
617: if (defined($token->[4]) && ($metamode < 1)) {
618: $currentstring = $token->[4];
619: } else {
620: $currentstring = $token->[2];
621: }
622: }
623: }
624: # &Apache::lonxml::debug("nodefalt:$nodefault:");
625: if ($currentstring eq '' && $nodefault eq '') {
626: if ($target eq 'edit') {
627: #&Apache::lonxml::debug("doing default edit for $token->[1]");
628: if ($token->[0] eq 'S') {
629: $currentstring = &Apache::edit::tag_start($target,$token);
630: } elsif ($token->[0] eq 'E') {
631: $currentstring = &Apache::edit::tag_end($target,$token);
632: }
633: }
634: }
635: if ($target eq 'modified' && $nodefault eq '') {
636: if ($currentstring eq '') {
637: if ($token->[0] eq 'S') {
638: $currentstring = $token->[4];
639: } elsif ($token->[0] eq 'E') {
640: $currentstring = $token->[2];
641: } else {
642: $currentstring = $token->[2];
643: }
644: }
645: if ($token->[0] eq 'S') {
646: $currentstring.=&Apache::edit::handle_insert();
647: } elsif ($token->[0] eq 'E') {
648: $currentstring.=&Apache::edit::handle_insertafter($token->[1]);
649: }
650: }
651: }
652: use strict 'refs';
653: }
654: return $currentstring;
655: }
656:
657: {
658: my %state;
659:
660: sub init_state {
661: undef(%state);
662: }
663:
664: sub set_state {
665: my ($key,$value) = @_;
666: $state{$key} = $value;
667: return $value;
668: }
669: sub get_state {
670: my ($key) = @_;
671: return $state{$key};
672: }
673: }
674:
675: sub setup_globals {
676: my ($request,$target)=@_;
677: $Apache::lonxml::request=$request;
678: $errorcount=0;
679: $warningcount=0;
680: $Apache::lonxml::default_homework_loaded=0;
681: $Apache::lonxml::usestyle=1;
682: &init_counter();
683: &clear_bubble_lines_for_part();
684: &init_state();
685: &set_state('target',$target);
686: @Apache::lonxml::pwd=();
687: @Apache::lonxml::extlinks=();
688: @script_var_displays=();
689: @Apache::lonxml::ssi_info=();
690: $Apache::lonxml::post_evaluate=1;
691: $Apache::lonxml::warnings_error_header='';
692: $Apache::lonxml::substitute_LaTeX_symbols = 1;
693: if ($target eq 'meta') {
694: $Apache::lonxml::redirection = 0;
695: $Apache::lonxml::metamode = 1;
696: $Apache::lonxml::evaluate = 1;
697: $Apache::lonxml::import = 0;
698: } elsif ($target eq 'answer') {
699: $Apache::lonxml::redirection = 0;
700: $Apache::lonxml::metamode = 1;
701: $Apache::lonxml::evaluate = 1;
702: $Apache::lonxml::import = 1;
703: } elsif ($target eq 'grade') {
704: &startredirection(); #ended in inner_xmlparse on exit
705: $Apache::lonxml::metamode = 0;
706: $Apache::lonxml::evaluate = 1;
707: $Apache::lonxml::import = 1;
708: } elsif ($target eq 'modified') {
709: $Apache::lonxml::redirection = 0;
710: $Apache::lonxml::metamode = 0;
711: $Apache::lonxml::evaluate = 0;
712: $Apache::lonxml::import = 0;
713: } elsif ($target eq 'edit') {
714: $Apache::lonxml::redirection = 0;
715: $Apache::lonxml::metamode = 0;
716: $Apache::lonxml::evaluate = 0;
717: $Apache::lonxml::import = 0;
718: } elsif ($target eq 'analyze') {
719: $Apache::lonxml::redirection = 0;
720: $Apache::lonxml::metamode = 0;
721: $Apache::lonxml::evaluate = 1;
722: $Apache::lonxml::import = 1;
723: } else {
724: $Apache::lonxml::redirection = 0;
725: $Apache::lonxml::metamode = 0;
726: $Apache::lonxml::evaluate = 1;
727: $Apache::lonxml::import = 1;
728: }
729: }
730:
731: sub init_safespace {
732: my ($target,$safeeval,$safehole,$safeinit) = @_;
733: $safeeval->deny_only(':dangerous');
734: $safeeval->reval('use Math::Complex;');
735: $safeeval->permit_only(":default");
736: $safeeval->permit("entereval");
737: $safeeval->permit(":base_math");
738: $safeeval->permit("sort");
739: $safeeval->permit("time");
740: $safeeval->permit("caller");
741: $safeeval->deny("rand");
742: $safeeval->deny("srand");
743: $safeeval->deny(":base_io");
744: $safehole->wrap(\&Apache::scripttag::xmlparse,$safeeval,'&xmlparse');
745: $safehole->wrap(\&Apache::outputtags::multipart,$safeeval,'&multipart');
746: $safehole->wrap(\&Apache::lonnet::EXT,$safeeval,'&EXT');
747: $safehole->wrap(\&Apache::chemresponse::chem_standard_order,$safeeval,
748: '&chem_standard_order');
749: $safehole->wrap(\&Apache::response::check_status,$safeeval,'&check_status');
750: $safehole->wrap(\&Apache::response::implicit_multiplication,$safeeval,'&implicit_multiplication');
751:
752: $safehole->wrap(\&Apache::lonmaxima::maxima_eval,$safeeval,'&maxima_eval');
753: $safehole->wrap(\&Apache::lonmaxima::maxima_check,$safeeval,'&maxima_check');
754: $safehole->wrap(\&Apache::lonmaxima::maxima_cas_formula_fix,$safeeval,
755: '&maxima_cas_formula_fix');
756:
757: $safehole->wrap(\&Apache::caparesponse::capa_formula_fix,$safeeval,
758: '&capa_formula_fix');
759:
760: $safehole->wrap(\&Apache::lonlocal::locallocaltime,$safeeval,
761: '&locallocaltime');
762:
763: $safehole->wrap(\&Math::Cephes::asin,$safeeval,'&asin');
764: $safehole->wrap(\&Math::Cephes::acos,$safeeval,'&acos');
765: $safehole->wrap(\&Math::Cephes::atan,$safeeval,'&atan');
766: $safehole->wrap(\&Math::Cephes::sinh,$safeeval,'&sinh');
767: $safehole->wrap(\&Math::Cephes::cosh,$safeeval,'&cosh');
768: $safehole->wrap(\&Math::Cephes::tanh,$safeeval,'&tanh');
769: $safehole->wrap(\&Math::Cephes::asinh,$safeeval,'&asinh');
770: $safehole->wrap(\&Math::Cephes::acosh,$safeeval,'&acosh');
771: $safehole->wrap(\&Math::Cephes::atanh,$safeeval,'&atanh');
772: $safehole->wrap(\&Math::Cephes::erf,$safeeval,'&erf');
773: $safehole->wrap(\&Math::Cephes::erfc,$safeeval,'&erfc');
774: $safehole->wrap(\&Math::Cephes::j0,$safeeval,'&j0');
775: $safehole->wrap(\&Math::Cephes::j1,$safeeval,'&j1');
776: $safehole->wrap(\&Math::Cephes::jn,$safeeval,'&jn');
777: $safehole->wrap(\&Math::Cephes::jv,$safeeval,'&jv');
778: $safehole->wrap(\&Math::Cephes::y0,$safeeval,'&y0');
779: $safehole->wrap(\&Math::Cephes::y1,$safeeval,'&y1');
780: $safehole->wrap(\&Math::Cephes::yn,$safeeval,'&yn');
781: $safehole->wrap(\&Math::Cephes::yv,$safeeval,'&yv');
782:
783: $safehole->wrap(\&Math::Cephes::bdtr ,$safeeval,'&bdtr' );
784: $safehole->wrap(\&Math::Cephes::bdtrc ,$safeeval,'&bdtrc' );
785: $safehole->wrap(\&Math::Cephes::bdtri ,$safeeval,'&bdtri' );
786: $safehole->wrap(\&Math::Cephes::btdtr ,$safeeval,'&btdtr' );
787: $safehole->wrap(\&Math::Cephes::chdtr ,$safeeval,'&chdtr' );
788: $safehole->wrap(\&Math::Cephes::chdtrc,$safeeval,'&chdtrc');
789: $safehole->wrap(\&Math::Cephes::chdtri,$safeeval,'&chdtri');
790: $safehole->wrap(\&Math::Cephes::fdtr ,$safeeval,'&fdtr' );
791: $safehole->wrap(\&Math::Cephes::fdtrc ,$safeeval,'&fdtrc' );
792: $safehole->wrap(\&Math::Cephes::fdtri ,$safeeval,'&fdtri' );
793: $safehole->wrap(\&Math::Cephes::gdtr ,$safeeval,'&gdtr' );
794: $safehole->wrap(\&Math::Cephes::gdtrc ,$safeeval,'&gdtrc' );
795: $safehole->wrap(\&Math::Cephes::nbdtr ,$safeeval,'&nbdtr' );
796: $safehole->wrap(\&Math::Cephes::nbdtrc,$safeeval,'&nbdtrc');
797: $safehole->wrap(\&Math::Cephes::nbdtri,$safeeval,'&nbdtri');
798: $safehole->wrap(\&Math::Cephes::ndtr ,$safeeval,'&ndtr' );
799: $safehole->wrap(\&Math::Cephes::ndtri ,$safeeval,'&ndtri' );
800: $safehole->wrap(\&Math::Cephes::pdtr ,$safeeval,'&pdtr' );
801: $safehole->wrap(\&Math::Cephes::pdtrc ,$safeeval,'&pdtrc' );
802: $safehole->wrap(\&Math::Cephes::pdtri ,$safeeval,'&pdtri' );
803: $safehole->wrap(\&Math::Cephes::stdtr ,$safeeval,'&stdtr' );
804: $safehole->wrap(\&Math::Cephes::stdtri,$safeeval,'&stdtri');
805:
806: $safehole->wrap(\&Math::Cephes::Matrix::mat,$safeeval,'&mat');
807: $safehole->wrap(\&Math::Cephes::Matrix::new,$safeeval,
808: '&Math::Cephes::Matrix::new');
809: $safehole->wrap(\&Math::Cephes::Matrix::coef,$safeeval,
810: '&Math::Cephes::Matrix::coef');
811: $safehole->wrap(\&Math::Cephes::Matrix::clr,$safeeval,
812: '&Math::Cephes::Matrix::clr');
813: $safehole->wrap(\&Math::Cephes::Matrix::add,$safeeval,
814: '&Math::Cephes::Matrix::add');
815: $safehole->wrap(\&Math::Cephes::Matrix::sub,$safeeval,
816: '&Math::Cephes::Matrix::sub');
817: $safehole->wrap(\&Math::Cephes::Matrix::mul,$safeeval,
818: '&Math::Cephes::Matrix::mul');
819: $safehole->wrap(\&Math::Cephes::Matrix::div,$safeeval,
820: '&Math::Cephes::Matrix::div');
821: $safehole->wrap(\&Math::Cephes::Matrix::inv,$safeeval,
822: '&Math::Cephes::Matrix::inv');
823: $safehole->wrap(\&Math::Cephes::Matrix::transp,$safeeval,
824: '&Math::Cephes::Matrix::transp');
825: $safehole->wrap(\&Math::Cephes::Matrix::simq,$safeeval,
826: '&Math::Cephes::Matrix::simq');
827: $safehole->wrap(\&Math::Cephes::Matrix::mat_to_vec,$safeeval,
828: '&Math::Cephes::Matrix::mat_to_vec');
829: $safehole->wrap(\&Math::Cephes::Matrix::vec_to_mat,$safeeval,
830: '&Math::Cephes::Matrix::vec_to_mat');
831: $safehole->wrap(\&Math::Cephes::Matrix::check,$safeeval,
832: '&Math::Cephes::Matrix::check');
833: $safehole->wrap(\&Math::Cephes::Matrix::check,$safeeval,
834: '&Math::Cephes::Matrix::check');
835:
836: # $safehole->wrap(\&Math::Cephes::new_fract,$safeeval,'&new_fract');
837: # $safehole->wrap(\&Math::Cephes::radd,$safeeval,'&radd');
838: # $safehole->wrap(\&Math::Cephes::rsub,$safeeval,'&rsub');
839: # $safehole->wrap(\&Math::Cephes::rmul,$safeeval,'&rmul');
840: # $safehole->wrap(\&Math::Cephes::rdiv,$safeeval,'&rdiv');
841: # $safehole->wrap(\&Math::Cephes::euclid,$safeeval,'&euclid');
842:
843: $safehole->wrap(\&Math::Random::random_beta,$safeeval,'&math_random_beta');
844: $safehole->wrap(\&Math::Random::random_chi_square,$safeeval,'&math_random_chi_square');
845: $safehole->wrap(\&Math::Random::random_exponential,$safeeval,'&math_random_exponential');
846: $safehole->wrap(\&Math::Random::random_f,$safeeval,'&math_random_f');
847: $safehole->wrap(\&Math::Random::random_gamma,$safeeval,'&math_random_gamma');
848: $safehole->wrap(\&Math::Random::random_multivariate_normal,$safeeval,'&math_random_multivariate_normal');
849: $safehole->wrap(\&Math::Random::random_multinomial,$safeeval,'&math_random_multinomial');
850: $safehole->wrap(\&Math::Random::random_noncentral_chi_square,$safeeval,'&math_random_noncentral_chi_square');
851: $safehole->wrap(\&Math::Random::random_noncentral_f,$safeeval,'&math_random_noncentral_f');
852: $safehole->wrap(\&Math::Random::random_normal,$safeeval,'&math_random_normal');
853: $safehole->wrap(\&Math::Random::random_permutation,$safeeval,'&math_random_permutation');
854: $safehole->wrap(\&Math::Random::random_permuted_index,$safeeval,'&math_random_permuted_index');
855: $safehole->wrap(\&Math::Random::random_uniform,$safeeval,'&math_random_uniform');
856: $safehole->wrap(\&Math::Random::random_poisson,$safeeval,'&math_random_poisson');
857: $safehole->wrap(\&Math::Random::random_uniform_integer,$safeeval,'&math_random_uniform_integer');
858: $safehole->wrap(\&Math::Random::random_negative_binomial,$safeeval,'&math_random_negative_binomial');
859: $safehole->wrap(\&Math::Random::random_binomial,$safeeval,'&math_random_binomial');
860: $safehole->wrap(\&Math::Random::random_seed_from_phrase,$safeeval,'&random_seed_from_phrase');
861: $safehole->wrap(\&Math::Random::random_set_seed_from_phrase,$safeeval,'&random_set_seed_from_phrase');
862: $safehole->wrap(\&Math::Random::random_get_seed,$safeeval,'&random_get_seed');
863: $safehole->wrap(\&Math::Random::random_set_seed,$safeeval,'&random_set_seed');
864: $safehole->wrap(\&Apache::loncommon::languages,$safeeval,'&languages');
865: $safehole->wrap(\&Apache::lonxml::error,$safeeval,'&LONCAPA_INTERNAL_ERROR');
866: $safehole->wrap(\&Apache::lonxml::debug,$safeeval,'&LONCAPA_INTERNAL_DEBUG');
867: $safehole->wrap(\&Apache::lonnet::logthis,$safeeval,'&LONCAPA_INTERNAL_LOGTHIS');
868: $safehole->wrap(\&Apache::inputtags::finalizeawards,$safeeval,'&LONCAPA_INTERNAL_FINALIZEAWARDS');
869: $safehole->wrap(\&Apache::caparesponse::get_sigrange,$safeeval,'&LONCAPA_INTERNAL_get_sigrange');
870: # use Data::Dumper;
871: # $safehole->wrap(\&Data::Dumper::Dumper,$safeeval,'&LONCAPA_INTERNAL_Dumper');
872: #need to inspect this class of ops
873: # $safeeval->deny(":base_orig");
874: $safeeval->permit("require");
875: $safeinit .= ';$external::target="'.$target.'";';
876: &Apache::run::run($safeinit,$safeeval);
877: &initialize_rndseed($safeeval);
878: }
879:
880: sub clean_safespace {
881: my ($safeeval) = @_;
882: delete_package_recurse($safeeval->{Root});
883: }
884:
885: sub delete_package_recurse {
886: my ($package) = @_;
887: my @subp;
888: {
889: no strict 'refs';
890: while (my ($key,$val) = each(%{*{"$package\::"}})) {
891: if (!defined($val)) { next; }
892: local (*ENTRY) = $val;
893: if (defined *ENTRY{HASH} && $key =~ /::$/ &&
894: $key ne "main::" && $key ne "<none>::")
895: {
896: my ($p) = $package ne "main" ? "$package\::" : "";
897: ($p .= $key) =~ s/::$//;
898: push(@subp,$p);
899: }
900: }
901: }
902: foreach my $p (@subp) {
903: delete_package_recurse($p);
904: }
905: Symbol::delete_package($package);
906: }
907:
908: sub initialize_rndseed {
909: my ($safeeval)=@_;
910: my $rndseed;
911: my ($symb,$courseid,$domain,$name) = &Apache::lonnet::whichuser();
912: $rndseed=&Apache::lonnet::rndseed($symb,$courseid,$domain,$name);
913: my $safeinit = '$external::randomseed="'.$rndseed.'";';
914: &Apache::lonxml::debug("Setting rndseed to $rndseed");
915: &Apache::run::run($safeinit,$safeeval);
916: }
917:
918: sub default_homework_load {
919: my ($safeeval)=@_;
920: &Apache::lonxml::debug('Loading default_homework');
921: my $default=&Apache::lonnet::getfile('/home/httpd/html/res/adm/includes/default_homework.lcpm');
922: if ($default eq -1) {
923: &Apache::lonxml::error("<b>Unable to find <i>default_homework.lcpm</i></b>");
924: } else {
925: &Apache::run::run($default,$safeeval);
926: $Apache::lonxml::default_homework_loaded=1;
927: }
928: }
929:
930: {
931: my $alarm_depth;
932: sub init_alarm {
933: alarm(0);
934: $alarm_depth=0;
935: }
936:
937: sub start_alarm {
938: if ($alarm_depth<1) {
939: my $old=alarm($Apache::lonnet::perlvar{'lonScriptTimeout'});
940: if ($old) {
941: &Apache::lonxml::error("Cancelled an alarm of $old, this shouldn't occur.");
942: }
943: }
944: $alarm_depth++;
945: }
946:
947: sub end_alarm {
948: $alarm_depth--;
949: if ($alarm_depth<1) { alarm(0); }
950: }
951: }
952: my $metamode_was;
953: sub startredirection {
954: if (!$Apache::lonxml::redirection) {
955: $metamode_was=$Apache::lonxml::metamode;
956: }
957: $Apache::lonxml::metamode=0;
958: $Apache::lonxml::redirection++;
959: push (@Apache::lonxml::outputstack, '');
960: }
961:
962: sub endredirection {
963: if (!$Apache::lonxml::redirection) {
964: &Apache::lonxml::error("Endredirection was called before a startredirection, perhaps you have unbalanced tags. Some debugging information:".join ":",caller);
965: return '';
966: }
967: $Apache::lonxml::redirection--;
968: if (!$Apache::lonxml::redirection) {
969: $Apache::lonxml::metamode=$metamode_was;
970: }
971: pop @Apache::lonxml::outputstack;
972: }
973: sub in_redirection {
974: return ($Apache::lonxml::redirection > 0)
975: }
976:
977: sub end_tag {
978: my ($tagstack,$parstack,$token)=@_;
979: pop(@$tagstack);
980: pop(@$parstack);
981: &decreasedepth($token);
982: }
983:
984: sub initdepth {
985: @Apache::lonxml::depthcounter=();
986: undef($Apache::lonxml::last_depth_count);
987: }
988:
989:
990: my @timers;
991: my $lasttime;
992: # @Apache::lonxml::depthcounter -> count of tags that exist so
993: # far at each level
994: # $Apache::lonxml::last_depth_count -> when ascending, need to
995: # remember the count for the level below the current level (for
996: # example going from 1_2 -> 1 -> 1_3 need to remember the 2 )
997:
998: sub increasedepth {
999: my ($token) = @_;
1000: push(@Apache::lonxml::depthcounter,$Apache::lonxml::last_depth_count+1);
1001: undef($Apache::lonxml::last_depth_count);
1002: my $time;
1003: if ($Apache::lonxml::debug eq "1") {
1004: push(@timers,[&gettimeofday()]);
1005: $time=&tv_interval($lasttime);
1006: $lasttime=[&gettimeofday()];
1007: }
1008: my $spacing=' 'x($#Apache::lonxml::depthcounter);
1009: $Apache::lonxml::curdepth=join('_',@Apache::lonxml::depthcounter);
1010: # &Apache::lonxml::debug("s$spacing$Apache::lonxml::depth : $Apache::lonxml::olddepth : $Apache::lonxml::curdepth : $token->[1] : $time");
1011: #print "<br />s $Apache::lonxml::depth : $Apache::lonxml::olddepth : $curdepth : $token->[1]\n";
1012: }
1013:
1014: sub decreasedepth {
1015: my ($token) = @_;
1016: if ( $#Apache::lonxml::depthcounter == -1) {
1017: &Apache::lonxml::warning(&mt("Missing tags, unable to properly run file."));
1018: }
1019: $Apache::lonxml::last_depth_count = pop(@Apache::lonxml::depthcounter);
1020:
1021: my ($timer,$time);
1022: if ($Apache::lonxml::debug eq "1") {
1023: $timer=pop(@timers);
1024: $time=&tv_interval($lasttime);
1025: $lasttime=[&gettimeofday()];
1026: }
1027: my $spacing=' 'x($#Apache::lonxml::depthcounter);
1028: $Apache::lonxml::curdepth = join('_',@Apache::lonxml::depthcounter);
1029: # &Apache::lonxml::debug("e$spacing$Apache::lonxml::depth : $Apache::lonxml::olddepth : $Apache::lonxml::curdepth : $token->[1] : $time : ".&tv_interval($timer));
1030: #print "<br />e $Apache::lonxml::depth : $Apache::lonxml::olddepth : $token->[1] : $curdepth\n";
1031: }
1032:
1033: sub get_id {
1034: my ($parstack,$safeeval)=@_;
1035: my $id= &Apache::lonxml::get_param('id',$parstack,$safeeval);
1036: if ($env{'request.state'} eq 'construct' && $id =~ /([._]|[^\w\d\s[:punct:]])/) {
1037: &error(&mt("ID "[_1]" contains invalid characters, IDs are only allowed to contain letters, numbers, spaces and -",'<tt>'.$id.'</tt>'));
1038: }
1039: if ($id =~ /^\s*$/) { $id = $Apache::lonxml::curdepth; }
1040: return $id;
1041: }
1042:
1043: sub get_all_text_unbalanced {
1044: #there is a copy of this in lonpublisher.pm
1045: my($tag,$pars)= @_;
1046: my $token;
1047: my $result='';
1048: $tag='<'.$tag.'>';
1049: while ($token = $$pars[-1]->get_token) {
1050: if (($token->[0] eq 'T')||($token->[0] eq 'C')||($token->[0] eq 'D')) {
1051: if ($token->[0] eq 'T' && $token->[2]) {
1052: $result.='<![CDATA['.$token->[1].']]>';
1053: } else {
1054: $result.=$token->[1];
1055: }
1056: } elsif ($token->[0] eq 'PI') {
1057: $result.=$token->[2];
1058: } elsif ($token->[0] eq 'S') {
1059: $result.=$token->[4];
1060: } elsif ($token->[0] eq 'E') {
1061: $result.=$token->[2];
1062: }
1063: if ($result =~ /\Q$tag\E/is) {
1064: ($result,my $redo)=$result =~ /(.*)\Q$tag\E(.*)/is;
1065: #&Apache::lonxml::debug('Got a winner with leftovers ::'.$2);
1066: #&Apache::lonxml::debug('Result is :'.$1);
1067: $redo=$tag.$redo;
1068: &Apache::lonxml::newparser($pars,\$redo);
1069: last;
1070: }
1071: }
1072: return $result
1073:
1074: }
1075:
1076: #########################################################################
1077: # #
1078: # bubble line counter management #
1079: # #
1080: #########################################################################
1081:
1082: =pod
1083:
1084: For bubble grading mode and exam bubble printing mode, the tracking of
1085: the current 'bubble line number' is stored in the %env element
1086: 'form.counter', and is modifed and handled by the following routines.
1087:
1088: The value of it is stored in $Apache:lonxml::counter when live and
1089: stored back to env after done.
1090:
1091: =item &increment_counter($increment);
1092:
1093: Increments the internal counter environment variable a specified amount
1094:
1095: Optional Arguments:
1096: $increment - amount to increment by (defaults to 1)
1097: Also 1 if the value is negative or zero.
1098: $part_response - A concatenation of the part and response id
1099: identifying exactly what is being 'answered'.
1100:
1101:
1102: =cut
1103:
1104: sub increment_counter {
1105: my ($increment, $part_response) = @_;
1106: if ($env{'form.grade_noincrement'}) { return; }
1107: if (!defined($increment) || $increment le 0) {
1108: $increment = 1;
1109: }
1110: $Apache::lonxml::counter += $increment;
1111:
1112: # If the caller supplied the response_id parameter,
1113: # Maintain its counter.. creating if necessary.
1114:
1115: if (defined($part_response)) {
1116: if (!defined($Apache::lonxml::counters_per_part{$part_response})) {
1117: $Apache::lonxml::counters_per_part{$part_response} = 0;
1118: }
1119: $Apache::lonxml::counters_per_part{$part_response} += $increment;
1120: my $new_value = $Apache::lonxml::counters_per_part{$part_response};
1121: }
1122:
1123: $Apache::lonxml::counter_changed=1;
1124: }
1125:
1126: =pod
1127:
1128: =item &init_counter($increment);
1129:
1130: Initialize the internal counter environment variable
1131:
1132: =cut
1133:
1134: sub init_counter {
1135: if ($env{'request.state'} eq 'construct') {
1136: $Apache::lonxml::counter=1;
1137: $Apache::lonxml::counter_changed=1;
1138: } elsif (defined($env{'form.counter'})) {
1139: $Apache::lonxml::counter=$env{'form.counter'};
1140: $Apache::lonxml::counter_changed=0;
1141: } else {
1142: $Apache::lonxml::counter=1;
1143: $Apache::lonxml::counter_changed=1;
1144: }
1145: }
1146:
1147: sub store_counter {
1148: &Apache::lonnet::appenv({'form.counter' => $Apache::lonxml::counter});
1149: $Apache::lonxml::counter_changed=0;
1150: return '';
1151: }
1152:
1153: {
1154: my $state;
1155: sub clear_problem_counter {
1156: undef($state);
1157: &Apache::lonnet::delenv('form.counter');
1158: &Apache::lonxml::init_counter();
1159: &Apache::lonxml::store_counter();
1160: }
1161:
1162: sub remember_problem_counter {
1163: &Apache::lonnet::transfer_profile_to_env(undef,undef,1);
1164: $state = $env{'form.counter'};
1165: }
1166:
1167: sub restore_problem_counter {
1168: if (defined($state)) {
1169: &Apache::lonnet::appenv({'form.counter' => $state});
1170: }
1171: }
1172: sub get_problem_counter {
1173: if ($Apache::lonxml::counter_changed) { &store_counter() }
1174: &Apache::lonnet::transfer_profile_to_env(undef,undef,1);
1175: return $env{'form.counter'};
1176: }
1177: }
1178:
1179: =pod
1180:
1181: =item bubble_lines_for_part(part_response)
1182:
1183: Returns the number of lines required to get a response for
1184: $part_response (this is just $Apache::lonxml::counters_per_part{$part_response}
1185:
1186: =cut
1187:
1188: sub bubble_lines_for_part {
1189: my ($part_response) = @_;
1190:
1191: if (!defined($Apache::lonxml::counters_per_part{$part_response})) {
1192: return 0;
1193: } else {
1194: return $Apache::lonxml::counters_per_part{$part_response};
1195: }
1196: }
1197:
1198: =pod
1199:
1200: =item clear_bubble_lines_for_part
1201:
1202: Clears the hash of bubble lines per part. If a caller
1203: needs to analyze several resources this should be called between
1204: resources to reset the hash for each problem being analyzed.
1205:
1206: =cut
1207:
1208: sub clear_bubble_lines_for_part {
1209: undef(%Apache::lonxml::counters_per_part);
1210: }
1211:
1212: =pod
1213:
1214: =item set_bubble_lines(part_response, value)
1215:
1216: If there is a problem part, that for whatever reason
1217: requires bubble lines that are not
1218: the same as the counter increment, it can call this sub during
1219: analysis to set its hash value explicitly.
1220:
1221: =cut
1222:
1223: sub set_bubble_lines {
1224: my ($part_response, $value) = @_;
1225:
1226: $Apache::lonxml::counters_per_part{$part_response} = $value;
1227: }
1228:
1229: =pod
1230:
1231: =item get_bubble_line_hash
1232:
1233: Returns the current bubble line hash. This is assumed to
1234: be small so we return a copy
1235:
1236:
1237: =cut
1238:
1239: sub get_bubble_line_hash {
1240: return %Apache::lonxml::counters_per_part;
1241: }
1242:
1243:
1244: #--------------------------------------------------
1245:
1246: sub get_all_text {
1247: my($tag,$pars,$style)= @_;
1248: my $gotfullstack=1;
1249: if (ref($pars) ne 'ARRAY') {
1250: $gotfullstack=0;
1251: $pars=[$pars];
1252: }
1253: if (ref($style) ne 'HASH') {
1254: $style={};
1255: }
1256: my $depth=0;
1257: my $token;
1258: my $result='';
1259: if ( $tag =~ m:^/: ) {
1260: my $tag=substr($tag,1);
1261: #&Apache::lonxml::debug("have:$tag:");
1262: my $top_empty=0;
1263: while (($depth >=0) && ($#$pars > -1) && (!$top_empty)) {
1264: while (($depth >=0) && ($token = $$pars[-1]->get_token)) {
1265: #&Apache::lonxml::debug("e token:$token->[0]:$depth:$token->[1]:".$#$pars.":".$#Apache::lonxml::pwd);
1266: if (($token->[0] eq 'T')||($token->[0] eq 'C')||($token->[0] eq 'D')) {
1267: if ($token->[2]) {
1268: $result.='<![CDATA['.$token->[1].']]>';
1269: } else {
1270: $result.=$token->[1];
1271: }
1272: } elsif ($token->[0] eq 'PI') {
1273: $result.=$token->[2];
1274: } elsif ($token->[0] eq 'S') {
1275: if ($token->[1] =~ /^\Q$tag\E$/i) { $depth++; }
1276: if ($token->[1] =~ /^LONCAPA_INTERNAL_TURN_STYLE_ON$/) { $Apache::lonxml::usestyle=1; }
1277: if ($token->[1] =~ /^LONCAPA_INTERNAL_TURN_STYLE_OFF$/) { $Apache::lonxml::usestyle=0; }
1278: $result.=$token->[4];
1279: } elsif ($token->[0] eq 'E') {
1280: if ( $token->[1] =~ /^\Q$tag\E$/i) { $depth--; }
1281: #skip sending back the last end tag
1282: if ($depth == 0 && exists($$style{'/'.$token->[1]}) && $Apache::lonxml::usestyle) {
1283: my $string=
1284: '<LONCAPA_INTERNAL_TURN_STYLE_OFF end="yes" />'.
1285: $$style{'/'.$token->[1]}.
1286: $token->[2].
1287: '<LONCAPA_INTERNAL_TURN_STYLE_ON />';
1288: &Apache::lonxml::newparser($pars,\$string);
1289: #&Apache::lonxml::debug("reParsing $string");
1290: next;
1291: }
1292: if ($depth > -1) {
1293: $result.=$token->[2];
1294: } else {
1295: $$pars[-1]->unget_token($token);
1296: }
1297: }
1298: }
1299: if (($depth >=0) && ($#$pars == 0) ) { $top_empty=1; }
1300: if (($depth >=0) && ($#$pars > 0) ) {
1301: pop(@$pars);
1302: pop(@Apache::lonxml::pwd);
1303: }
1304: }
1305: if ($top_empty && $depth >= 0) {
1306: #never found the end tag ran out of text, throw error send back blank
1307: &error('Never found end tag for <'.$tag.
1308: '> current string <pre>'.
1309: &HTML::Entities::encode($result,'<>&"').
1310: '</pre>');
1311: if ($gotfullstack) {
1312: my $newstring='</'.$tag.'>'.$result;
1313: &Apache::lonxml::newparser($pars,\$newstring);
1314: }
1315: $result='';
1316: }
1317: } else {
1318: while ($#$pars > -1) {
1319: while ($token = $$pars[-1]->get_token) {
1320: #&Apache::lonxml::debug("s token:$token->[0]:$depth:$token->[1]");
1321: if (($token->[0] eq 'T')||($token->[0] eq 'C')||
1322: ($token->[0] eq 'D')) {
1323: if ($token->[2]) {
1324: $result.='<![CDATA['.$token->[1].']]>';
1325: } else {
1326: $result.=$token->[1];
1327: }
1328: } elsif ($token->[0] eq 'PI') {
1329: $result.=$token->[2];
1330: } elsif ($token->[0] eq 'S') {
1331: if ( $token->[1] =~ /^\Q$tag\E$/i) {
1332: $$pars[-1]->unget_token($token); last;
1333: } else {
1334: $result.=$token->[4];
1335: }
1336: if ($token->[1] =~ /^LONCAPA_INTERNAL_TURN_STYLE_ON$/) { $Apache::lonxml::usestyle=1; }
1337: if ($token->[1] =~ /^LONCAPA_INTERNAL_TURN_STYLE_OFF$/) { $Apache::lonxml::usestyle=0; }
1338: } elsif ($token->[0] eq 'E') {
1339: $result.=$token->[2];
1340: }
1341: }
1342: if (($#$pars > 0) ) {
1343: pop(@$pars);
1344: pop(@Apache::lonxml::pwd);
1345: } else { last; }
1346: }
1347: }
1348: #&Apache::lonxml::debug("Exit:$result:");
1349: return $result
1350: }
1351:
1352: sub newparser {
1353: my ($parser,$contentref,$dir) = @_;
1354: push (@$parser,HTML::LCParser->new($contentref));
1355: $$parser[-1]->xml_mode(1);
1356: $$parser[-1]->marked_sections(1);
1357: if ( $dir eq '' ) {
1358: push (@Apache::lonxml::pwd, $Apache::lonxml::pwd[$#Apache::lonxml::pwd]);
1359: } else {
1360: push (@Apache::lonxml::pwd, $dir);
1361: }
1362: }
1363:
1364: sub parstring {
1365: my ($token) = @_;
1366: my (@vars,@values);
1367: foreach my $attr (@{$token->[3]}) {
1368: if ($attr!~/\W/) {
1369: my $val=$token->[2]->{$attr};
1370: $val =~ s/([\%\@\\\"\'])/\\$1/g;
1371: $val =~ s/(\$[^\{a-zA-Z_])/\\$1/g;
1372: $val =~ s/(\$)$/\\$1/;
1373: #if ($val =~ m/^[\%\@]/) { $val="\\".$val; }
1374: push(@vars,"\$$attr");
1375: push(@values,"\"$val\"");
1376: }
1377: }
1378: my $var_init =
1379: (@vars) ? 'my ('.join(',',@vars).') = ('.join(',',@values).');'
1380: : '';
1381: return $var_init;
1382: }
1383:
1384: sub extlink {
1385: my ($res,$exact)=@_;
1386: if (!$exact) {
1387: $res=&Apache::lonnet::hreflocation($Apache::lonxml::pwd[-1],$res);
1388: }
1389: push(@Apache::lonxml::extlinks,$res)
1390: }
1391:
1392: sub writeallows {
1393: unless ($#extlinks>=0) { return; }
1394: my $thisurl = &Apache::lonnet::clutter(shift);
1395: if ($env{'httpref.'.$thisurl}) {
1396: $thisurl=$env{'httpref.'.$thisurl};
1397: }
1398: my $thisdir=$thisurl;
1399: $thisdir=~s/\/[^\/]+$//;
1400: my %httpref=();
1401: foreach (@extlinks) {
1402: $httpref{'httpref.'.
1403: &Apache::lonnet::hreflocation($thisdir,&unescape($_))}=$thisurl;
1404: }
1405: @extlinks=();
1406: &Apache::lonnet::appenv(\%httpref);
1407: }
1408:
1409: sub register_ssi {
1410: my ($url,%form)=@_;
1411: push (@Apache::lonxml::ssi_info,{'url'=>$url,'form'=>\%form});
1412: return '';
1413: }
1414:
1415: sub do_registered_ssi {
1416: foreach my $info (@Apache::lonxml::ssi_info) {
1417: my %form=%{ $info->{'form'}};
1418: my $url=$info->{'url'};
1419: &Apache::lonnet::ssi($url,%form);
1420: }
1421: }
1422:
1423: sub add_script_result {
1424: my ($display) = @_;
1425: push(@script_var_displays, $display);
1426: }
1427:
1428: #
1429: # Afterburner handles anchors, highlights and links
1430: #
1431: sub afterburn {
1432: my $result=shift;
1433: &Apache::loncommon::get_unprocessed_cgi($ENV{'QUERY_STRING'},
1434: ['highlight','anchor','link']);
1435: if ($env{'form.highlight'}) {
1436: foreach (split(/\,/,$env{'form.highlight'})) {
1437: my $anchorname=$_;
1438: my $matchthis=$anchorname;
1439: $matchthis=~s/\_+/\\s\+/g;
1440: $result=~s/(\Q$matchthis\E)/\<font color=\"red\"\>$1\<\/font\>/gs;
1441: }
1442: }
1443: if ($env{'form.link'}) {
1444: foreach (split(/\,/,$env{'form.link'})) {
1445: my ($anchorname,$linkurl)=split(/\>/,$_);
1446: my $matchthis=$anchorname;
1447: $matchthis=~s/\_+/\\s\+/g;
1448: $result=~s/(\Q$matchthis\E)/\<a href=\"$linkurl\"\>$1\<\/a\>/gs;
1449: }
1450: }
1451: if ($env{'form.anchor'}) {
1452: my $anchorname=$env{'form.anchor'};
1453: my $matchthis=$anchorname;
1454: $matchthis=~s/\_+/\\s\+/g;
1455: $result=~s/(\Q$matchthis\E)/\<a name=\"$anchorname\"\>$1\<\/a\>/s;
1456: $result.=(<<"ENDSCRIPT");
1457: <script type="text/javascript">
1458: document.location.hash='$anchorname';
1459: </script>
1460: ENDSCRIPT
1461: }
1462: return $result;
1463: }
1464:
1465: sub storefile {
1466: my ($file,$contents)=@_;
1467: &Apache::lonnet::correct_line_ends(\$contents);
1468: if (my $fh=Apache::File->new('>'.$file)) {
1469: print $fh $contents;
1470: $fh->close();
1471: return 1;
1472: } else {
1473: &warning(&mt('Unable to save file [_1]','<tt>'.$file.'</tt>'));
1474: return 0;
1475: }
1476: }
1477:
1478: sub createnewhtml {
1479: my $title=&mt('Title of document goes here');
1480: my $body=&mt('Body of document goes here');
1481: my $filecontents=(<<SIMPLECONTENT);
1482: <html>
1483: <head>
1484: <title>$title</title>
1485: </head>
1486: <body bgcolor="#FFFFFF">
1487: $body
1488: </body>
1489: </html>
1490: SIMPLECONTENT
1491: return $filecontents;
1492: }
1493:
1494: sub createnewsty {
1495: my $filecontents=(<<SIMPLECONTENT);
1496: <definetag name="">
1497: <render>
1498: <web></web>
1499: <tex></tex>
1500: </render>
1501: </definetag>
1502: SIMPLECONTENT
1503: return $filecontents;
1504: }
1505:
1506: sub verify_html {
1507: my ($filecontents)=@_;
1508: if ($filecontents!~/(?:\<|\<\;)(?:html|xml)[^\<]*(?:\>|\>\;)/is) {
1509: return &mt('File does not have [_1] or [_2] starting tag','<html>','<xml>');
1510: }
1511: if ($filecontents!~/(?:\<|\<\;)\/(?:html|xml)(?:\>|\>\;)/is) {
1512: return &mt('File does not have [_1] or [_2] ending tag','<html>','<xml>');
1513: }
1514: if ($filecontents!~/(?:\<|\<\;)(?:body|frameset)[^\<]*(?:\>|\>\;)/is) {
1515: return &mt('File does not have [_1] or [_2] starting tag','<body>','<frameset>');
1516: }
1517: if ($filecontents!~/(?:\<|\<\;)\/(?:body|frameset)[^\<]*(?:\>|\>\;)/is) {
1518: return &mt('File does not have [_1] or [_2] ending tag','<body>','<frameset>');
1519: }
1520: return '';
1521: }
1522:
1523: sub renderingoptions {
1524: my %langchoices=('' => '');
1525: foreach (&Apache::loncommon::languageids()) {
1526: if (&Apache::loncommon::supportedlanguagecode($_)) {
1527: $langchoices{&Apache::loncommon::supportedlanguagecode($_)}
1528: = &Apache::loncommon::plainlanguagedescription($_);
1529: }
1530: }
1531: return
1532: '<span class="LC_nobreak">'.
1533: &mt('Language:').' '.
1534: &Apache::loncommon::select_form($env{'form.languages'},'languages',
1535: %langchoices).'
1536: </span>
1537: <span class="LC_nobreak">'.
1538: &mt('Math Rendering:').' '.
1539: &Apache::loncommon::select_form($env{'form.texengine'},'texengine',
1540: ('' => '',
1541: 'tth' => 'tth (TeX to HTML)',
1542: 'jsMath' => 'jsMath',
1543: 'mimetex' => 'mimetex (Convert to Images)')).'
1544: </span>';
1545: }
1546:
1547: sub inserteditinfo {
1548: my ($filecontents, $filetype, $filename)=@_;
1549: $filecontents = &HTML::Entities::encode($filecontents,'<>&"');
1550: my $xml_help = '';
1551: my $initialize='';
1552: my $textarea_id = 'filecont';
1553: my ($add_to_onload, $add_to_onresize);
1554: $initialize=&Apache::lonhtmlcommon::spellheader();
1555: if ($filetype eq 'html'
1556: && (!&Apache::lonhtmlcommon::htmlareablocked() &&
1557: &Apache::lonhtmlcommon::htmlareabrowser())) {
1558: $textarea_id .= '___Frame';
1559: my $lang = &Apache::lonhtmlcommon::htmlarea_lang();
1560: $initialize.=(<<FULLPAGE);
1561: <script type="text/javascript">
1562: lonca
1563: function initDocument() {
1564: var oFCKeditor = new FCKeditor('filecont');
1565: oFCKeditor.Config['CustomConfigurationsPath'] = '/fckeditor/loncapaconfig.js' ;
1566: oFCKeditor.Config['FullPage'] = true
1567: oFCKeditor.Config['AutoDetectLanguage'] = false;
1568: oFCKeditor.Config['DefaultLanguage'] = "$lang";
1569: oFCKeditor.ReplaceTextarea();
1570: }
1571: function check_if_dirty(editor) {
1572: if (editor.IsDirty()) {
1573: unClean();
1574: }
1575: }
1576: function FCKeditor_OnComplete(editor) {
1577: editor.Events.AttachEvent("OnSelectionChange",check_if_dirty);
1578: resize_textarea('$textarea_id','LC_aftertextarea');
1579: }
1580: </script>
1581: FULLPAGE
1582: } else {
1583: $initialize.=(<<FULLPAGE);
1584: <script type="text/javascript">
1585: function initDocument() {
1586: resize_textarea('$textarea_id','LC_aftertextarea');
1587: }
1588: </script>
1589: FULLPAGE
1590: }
1591:
1592: $add_to_onload = 'initDocument();';
1593: $add_to_onresize = "resize_textarea('$textarea_id','LC_aftertextarea');";
1594:
1595: if ($filetype eq 'html') {
1596: $xml_help=&Apache::loncommon::helpLatexCheatsheet();
1597: }
1598:
1599: my $titledisplay=&display_title();
1600: my %lt=&Apache::lonlocal::texthash('st' => 'Save and Edit',
1601: 'vi' => 'Save and View',
1602: 'dv' => 'Discard Edits and View',
1603: 'un' => 'undo',
1604: 'ed' => 'Edit');
1605: my $spelllink .=&Apache::lonhtmlcommon::spelllink('xmledit','filecont');
1606: my $textarea_events = &Apache::edit::element_change_detection();
1607: my $form_events = &Apache::edit::form_change_detection();
1608: my $htmlerror=&verify_html($filecontents);
1609: if ($htmlerror) {
1610: $htmlerror='<span class="LC_error">'.$htmlerror.'</span>';
1611: }
1612: my $editfooter=(<<ENDFOOTER);
1613: $initialize
1614: <a name="editsection" />
1615: <form $form_events method="post" name="xmledit">
1616: <div class="LC_edit_problem_editxml_header">
1617: <table class="LC_edit_problem_header_title"><tr><td>
1618: $filename
1619: </td><td align="right">
1620: $xml_help
1621: </td></tr>
1622: </table>
1623: <div class="LC_edit_problem_discards">
1624: <input type="submit" name="discardview" accesskey="d" value="$lt{'dv'}" />
1625: <input type="submit" name="Undo" accesskey="u" value="$lt{'un'}" />
1626: $spelllink $htmlerror
1627: </div>
1628: <div class="LC_edit_problem_saves">
1629: <input type="submit" name="savethisfile" accesskey="s" value="$lt{'st'}" />
1630: <input type="submit" name="viewmode" accesskey="v" value="$lt{'vi'}" />
1631: </div>
1632: </div>
1633: <textarea $textarea_events style="width:100%" cols="80" rows="44" name="filecont" id="filecont">$filecontents</textarea>
1634: <div id="LC_aftertextarea">
1635: <br />
1636: $titledisplay
1637: </div>
1638: </form>
1639: </body>
1640: ENDFOOTER
1641: return ($editfooter,$add_to_onload,$add_to_onresize);;
1642: }
1643:
1644: sub get_target {
1645: my $viewgrades=&Apache::lonnet::allowed('vgr',$env{'request.course.id'});
1646: if ( $env{'request.state'} eq 'published') {
1647: if ( defined($env{'form.grade_target'})
1648: && ($viewgrades == 'F' )) {
1649: return ($env{'form.grade_target'});
1650: } elsif (defined($env{'form.grade_target'})) {
1651: if (($env{'form.grade_target'} eq 'web') ||
1652: ($env{'form.grade_target'} eq 'tex') ) {
1653: return $env{'form.grade_target'}
1654: } else {
1655: return 'web';
1656: }
1657: } else {
1658: return 'web';
1659: }
1660: } elsif ($env{'request.state'} eq 'construct') {
1661: if ( defined($env{'form.grade_target'})) {
1662: return ($env{'form.grade_target'});
1663: } else {
1664: return 'web';
1665: }
1666: } else {
1667: return 'web';
1668: }
1669: }
1670:
1671: sub handler {
1672: my $request=shift;
1673:
1674: my $target=&get_target();
1675:
1676: $Apache::lonxml::debug=$env{'user.debug'};
1677:
1678: &Apache::loncommon::content_type($request,'text/html');
1679: &Apache::loncommon::no_cache($request);
1680: if ($env{'request.state'} eq 'published') {
1681: $request->set_last_modified(&Apache::lonnet::metadata($request->uri,
1682: 'lastrevisiondate'));
1683: }
1684: $request->send_http_header;
1685:
1686: return OK if $request->header_only;
1687:
1688:
1689: my $file=&Apache::lonnet::filelocation("",$request->uri);
1690: my $filetype;
1691: if ($file =~ /\.sty$/) {
1692: $filetype='sty';
1693: } else {
1694: $filetype='html';
1695: }
1696: #
1697: # Edit action? Save file.
1698: #
1699: if (!($env{'request.state'} eq 'published')) {
1700: if ($env{'form.savethisfile'} || $env{'form.viewmode'} || $env{'form.Undo'}) {
1701: my $html_file=&Apache::lonnet::getfile($file);
1702: my $error = &Apache::lonhomework::handle_save_or_undo($request, \$html_file, \$env{'form.filecont'});
1703: if ($env{'form.savethisfile'}) {
1704: $env{'form.editmode'}='Edit'; #force edit mode
1705: }
1706: }
1707: }
1708: my %mystyle;
1709: my $result = '';
1710: my $filecontents=&Apache::lonnet::getfile($file);
1711: if ($filecontents eq -1) {
1712: my $start_page=&Apache::loncommon::start_page('File Error');
1713: my $end_page=&Apache::loncommon::end_page();
1714: my $fnf=&mt('File not found');
1715: $result=(<<ENDNOTFOUND);
1716: $start_page
1717: <b>$fnf: $file</b>
1718: $end_page
1719: ENDNOTFOUND
1720: $filecontents='';
1721: if ($env{'request.state'} ne 'published') {
1722: if ($filetype eq 'sty') {
1723: $filecontents=&createnewsty();
1724: } else {
1725: $filecontents=&createnewhtml();
1726: }
1727: $env{'form.editmode'}='Edit'; #force edit mode
1728: }
1729: } else {
1730: unless ($env{'request.state'} eq 'published') {
1731: if ($filecontents=~/BEGIN LON-CAPA Internal/) {
1732: &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.'));
1733: }
1734: #
1735: # we are in construction space, see if edit mode forced
1736: &Apache::loncommon::get_unprocessed_cgi($ENV{'QUERY_STRING'},
1737: ['editmode']);
1738: }
1739: if (!$env{'form.editmode'} || $env{'form.viewmode'} || $env{'form.discardview'}) {
1740: &Apache::structuretags::reset_problem_globals();
1741: $result = &Apache::lonxml::xmlparse($request,$target,$filecontents,
1742: '',%mystyle);
1743: # .html files may contain <problem> or <Task> need to clean
1744: # up if it did
1745: &Apache::structuretags::reset_problem_globals();
1746: &Apache::lonhomework::finished_parsing();
1747: &Apache::loncommon::get_unprocessed_cgi($ENV{'QUERY_STRING'},
1748: ['rawmode']);
1749: if ($env{'form.rawmode'}) { $result = $filecontents; }
1750: if ($filetype eq 'sty') {
1751: my $controls =
1752: ($env{'request.state'} eq 'construct') ? &Apache::londefdef::edit_controls()
1753: : '';
1754: my %options = ('bgcolor' => '#FFFFFF');
1755: $result =
1756: &Apache::loncommon::start_page(undef,undef,\%options).
1757: $controls.
1758: $result.
1759: &Apache::loncommon::end_page();
1760: }
1761: }
1762: }
1763:
1764: #
1765: # Edit action? Insert editing commands
1766: #
1767: unless ($env{'request.state'} eq 'published') {
1768: if ($env{'form.editmode'} && (!($env{'form.viewmode'})) && (!($env{'form.discardview'})))
1769: {
1770: my $displayfile=$request->uri;
1771: $displayfile=~s/^\/[^\/]*//;
1772:
1773: my ($edit_info, $add_to_onload, $add_to_onresize)=
1774: &inserteditinfo($filecontents,$filetype,$displayfile);
1775:
1776: my %options =
1777: ('add_entries' =>
1778: {'onresize' => $add_to_onresize,
1779: 'onload' => $add_to_onload, });
1780:
1781: if ($env{'environment.remote'} ne 'off') {
1782: $options{'bgcolor'} = '#FFFFFF';
1783: $options{'only_body'} = 1;
1784: }
1785: my $js =
1786: &Apache::edit::js_change_detection().
1787: &Apache::loncommon::resize_textarea_js();
1788: my $start_page = &Apache::loncommon::start_page(undef,$js,
1789: \%options);
1790: $result=$start_page.
1791: &Apache::lonxml::message_location().
1792: $edit_info.
1793: &Apache::loncommon::end_page();
1794: }
1795: }
1796: if ($filetype eq 'html') { &writeallows($request->uri); }
1797:
1798: &Apache::lonxml::add_messages(\$result);
1799: $request->print($result);
1800:
1801: return OK;
1802: }
1803:
1804: sub display_title {
1805: my $result;
1806: if ($env{'request.state'} eq 'construct') {
1807: my $title=&Apache::lonnet::gettitle();
1808: if (!defined($title) || $title eq '') {
1809: $title = $env{'request.filename'};
1810: $title = substr($title, rindex($title, '/') + 1);
1811: }
1812: $result = "<script type='text/javascript'>top.document.title = '$title - LON-CAPA "
1813: .&mt('Construction Space')."';</script>";
1814: }
1815: return $result;
1816: }
1817:
1818: sub debug {
1819: if ($Apache::lonxml::debug eq "1") {
1820: $|=1;
1821: my $request=$Apache::lonxml::request;
1822: if (!$request) {
1823: eval { $request=Apache->request; };
1824: }
1825: if (!$request) {
1826: eval { $request=Apache2::RequestUtil->request; };
1827: }
1828: $request->print('<font size="-2"><pre>DEBUG:'.&HTML::Entities::encode($_[0],'<>&"')."</pre></font>\n");
1829: #&Apache::lonnet::logthis($_[0]);
1830: }
1831: }
1832:
1833: sub show_error_warn_msg {
1834: if ($env{'request.filename'} eq '/home/httpd/html/res/lib/templates/simpleproblem.problem' &&
1835: &Apache::lonnet::allowed('mdc',$env{'request.course.id'})) {
1836: return 1;
1837: }
1838: return (($Apache::lonxml::debug eq 1) ||
1839: ($env{'request.state'} eq 'construct') ||
1840: ($Apache::lonhomework::browse eq 'F'
1841: &&
1842: $env{'form.show_errors'} eq 'on'));
1843: }
1844:
1845: sub error {
1846: my @errors = @_;
1847:
1848: $errorcount++;
1849:
1850: if (defined($Apache::inputtags::part)) {
1851: if ( @Apache::inputtags::response ) {
1852: push(@errors,
1853: &mt("This error occurred while processing response [_1] in part [_2]",
1854: $Apache::inputtags::response[-1],
1855: $Apache::inputtags::part));
1856: } else {
1857: push(@errors,
1858: &mt("This error occurred while processing part [_1]",
1859: $Apache::inputtags::part));
1860: }
1861: }
1862:
1863: if ( &show_error_warn_msg() ) {
1864: # If printing in construction space, put the error inside <pre></pre>
1865: push(@Apache::lonxml::error_messages,
1866: $Apache::lonxml::warnings_error_header
1867: .'<div class="LC_error">'
1868: .'<b>'.&mt('ERROR:').' </b>'.join("<br />\n",@errors)
1869: ."</div>\n");
1870: $Apache::lonxml::warnings_error_header='';
1871: } else {
1872: my $errormsg;
1873: my ($symb)=&Apache::lonnet::symbread();
1874: if ( !$symb ) {
1875: #public or browsers
1876: $errormsg=&mt("An error occurred while processing this resource. The author has been notified.");
1877: }
1878: my $host=$Apache::lonnet::perlvar{'lonHostID'};
1879: push(@errors,
1880: &mt("The error occurred on host [_1]",
1881: "<tt>$host</tt>"));
1882:
1883: my $msg = join('<br />', @errors);
1884:
1885: #notify author
1886: &Apache::lonmsg::author_res_msg($env{'request.filename'},$msg);
1887: #notify course
1888: if ( $symb && $env{'request.course.id'} ) {
1889: my $cnum=$env{'course.'.$env{'request.course.id'}.'.num'};
1890: my $cdom=$env{'course.'.$env{'request.course.id'}.'.domain'};
1891: my (undef,%users)=&Apache::lonmsg::decide_receiver(undef,0,1,1,1);
1892: my $declutter=&Apache::lonnet::declutter($env{'request.filename'});
1893: my $baseurl = &Apache::lonnet::clutter($declutter);
1894: my @userlist;
1895: foreach (keys %users) {
1896: my ($user,$domain) = split(/:/, $_);
1897: push(@userlist,"$user\@$domain");
1898: my $key=$declutter.'_'.$user.'_'.$domain;
1899: my %lastnotified=&Apache::lonnet::get('nohist_xmlerrornotifications',
1900: [$key],
1901: $cdom,$cnum);
1902: my $now=time;
1903: if ($now-$lastnotified{$key}>86400) {
1904: my $title = &Apache::lonnet::gettitle($symb);
1905: my $sentmessage;
1906: &Apache::lonmsg::user_normal_msg($user,$domain,
1907: "Error [$title]",$msg,'',$baseurl,'','',
1908: \$sentmessage,$symb,$title,1);
1909: &Apache::lonnet::put('nohist_xmlerrornotifications',
1910: {$key => $now},
1911: $cdom,$cnum);
1912: }
1913: }
1914: if ($env{'request.role.adv'}) {
1915: $errormsg=&mt("An error occurred while processing this resource. The course personnel ([_1]) and the author have been notified.",join(', ',@userlist));
1916: } else {
1917: $errormsg=&mt("An error occurred while processing this resource. The instructor has been notified.");
1918: }
1919: }
1920: push(@Apache::lonxml::error_messages,"<b>$errormsg</b> <br />");
1921: }
1922: }
1923:
1924: sub warning {
1925: $warningcount++;
1926:
1927: if ($env{'form.grade_target'} ne 'tex') {
1928: if ( &show_error_warn_msg() ) {
1929: push(@Apache::lonxml::warning_messages,
1930: $Apache::lonxml::warnings_error_header
1931: .'<div class="LC_warning">'
1932: .&mt('[_1]W[_2]ARNING','<b>','</b>')."<b>:</b> ".join('<br />',@_)
1933: ."</div>\n"
1934: );
1935: $Apache::lonxml::warnings_error_header='';
1936: }
1937: }
1938: }
1939:
1940: sub info {
1941: if ($env{'form.grade_target'} ne 'tex'
1942: && $env{'request.state'} eq 'construct') {
1943: push(@Apache::lonxml::info_messages,join('<br />',@_)."<br />\n");
1944: }
1945: }
1946:
1947: sub message_location {
1948: return '__LONCAPA_INTERNAL_MESSAGE_LOCATION__';
1949: }
1950:
1951: sub add_messages {
1952: my ($msg)=@_;
1953: my $result=join(' ',
1954: @Apache::lonxml::info_messages,
1955: @Apache::lonxml::error_messages,
1956: @Apache::lonxml::warning_messages);
1957: undef(@Apache::lonxml::info_messages);
1958: undef(@Apache::lonxml::error_messages);
1959: undef(@Apache::lonxml::warning_messages);
1960: $$msg=~s/__LONCAPA_INTERNAL_MESSAGE_LOCATION__/$result/;
1961: $$msg=~s/__LONCAPA_INTERNAL_MESSAGE_LOCATION__//g;
1962: }
1963:
1964: sub get_param {
1965: my ($param,$parstack,$safeeval,$context,$case_insensitive) = @_;
1966: if ( ! $context ) { $context = -1; }
1967: my $args ='';
1968: if ( $#$parstack > (-2-$context) ) { $args=$$parstack[$context]; }
1969: if ( ! $Apache::lonxml::usestyle ) {
1970: $args=$Apache::lonxml::style_values.$args;
1971: }
1972: if ( ! $args ) { return undef; }
1973: if ( $case_insensitive ) {
1974: if ($args =~ s/(my (?:.*))(\$\Q$param\E[,\)])/$1.lc($2)/ei) {
1975: return &Apache::run::run("{$args;".'return $'.$param.'}',
1976: $safeeval); #'
1977: } else {
1978: return undef;
1979: }
1980: } else {
1981: if ( $args =~ /my .*\$\Q$param\E[,\)]/ ) {
1982: return &Apache::run::run("{$args;".'return $'.$param.'}',
1983: $safeeval); #'
1984: } else {
1985: return undef;
1986: }
1987: }
1988: }
1989:
1990: sub get_param_var {
1991: my ($param,$parstack,$safeeval,$context,$case_insensitive) = @_;
1992: if ( ! $context ) { $context = -1; }
1993: my $args ='';
1994: if ( $#$parstack > (-2-$context) ) { $args=$$parstack[$context]; }
1995: if ( ! $Apache::lonxml::usestyle ) {
1996: $args=$Apache::lonxml::style_values.$args;
1997: }
1998: &Apache::lonxml::debug("Args are $args param is $param");
1999: if ($case_insensitive) {
2000: if (! ($args=~s/(my (?:.*))(\$\Q$param\E[,\)])/$1.lc($2)/ei)) {
2001: return undef;
2002: }
2003: } elsif ( $args !~ /my .*\$\Q$param\E[,\)]/ ) { return undef; }
2004: my $value=&Apache::run::run("{$args;".'return $'.$param.'}',$safeeval); #'
2005: &Apache::lonxml::debug("first run is $value");
2006: if ($value =~ /^[\$\@\%][a-zA-Z_]\w*$/) {
2007: &Apache::lonxml::debug("doing second");
2008: my @result=&Apache::run::run("return $value",$safeeval,1);
2009: if (!defined($result[0])) {
2010: return $value
2011: } else {
2012: if (wantarray) { return @result; } else { return $result[0]; }
2013: }
2014: } else {
2015: return $value;
2016: }
2017: }
2018:
2019: sub register_insert_xml {
2020: my $parser = HTML::LCParser->new($Apache::lonnet::perlvar{'lonTabDir'}
2021: .'/insertlist.xml');
2022: my ($tagnum,$in_help)=(0,0);
2023: my @alltags;
2024: my $tag;
2025: while (my $token = $parser->get_token()) {
2026: if ($token->[0] eq 'S') {
2027: my $key;
2028: if ($token->[1] eq 'tag') {
2029: $tag = $token->[2]{'name'};
2030: $insertlist{"$tagnum.tag"} = $tag;
2031: $insertlist{"$tag.num"} = $tagnum;
2032: push(@alltags,$tag);
2033: } elsif ($in_help && $token->[1] eq 'file') {
2034: $key = $tag.'.helpfile';
2035: } elsif ($in_help && $token->[1] eq 'description') {
2036: $key = $tag.'.helpdesc';
2037: } elsif ($token->[1] eq 'description' ||
2038: $token->[1] eq 'color' ||
2039: $token->[1] eq 'show' ) {
2040: $key = $tag.'.'.$token->[1];
2041: } elsif ($token->[1] eq 'insert_sub') {
2042: $key = $tag.'.function';
2043: } elsif ($token->[1] eq 'help') {
2044: $in_help=1;
2045: } elsif ($token->[1] eq 'allow') {
2046: $key = $tag.'.allow';
2047: }
2048: if (defined($key)) {
2049: $insertlist{$key} = $parser->get_text();
2050: $insertlist{$key} =~ s/(^\s*|\s*$ )//gx;
2051: }
2052: } elsif ($token->[0] eq 'E') {
2053: if ($token->[1] eq 'tag') {
2054: undef($tag);
2055: $tagnum++;
2056: } elsif ($token->[1] eq 'help') {
2057: undef($in_help);
2058: }
2059: }
2060: }
2061:
2062: # parse the allows and ignore tags set to <show>no</show>
2063: foreach my $tag (@alltags) {
2064: next if (!exists($insertlist{"$tag.allow"}));
2065: my $allow = $insertlist{"$tag.allow"};
2066: foreach my $element (split(',',$allow)) {
2067: $element =~ s/(^\s*|\s*$ )//gx;
2068: if (!exists($insertlist{"$element.show"})
2069: || $insertlist{"$element.show"} ne 'no') {
2070: push(@{ $insertlist{$tag.'.which'} },$element);
2071: }
2072: }
2073: }
2074: }
2075:
2076: sub register_insert {
2077: return ®ister_insert_xml(@_);
2078: # &dump_insertlist('2');
2079: }
2080:
2081: sub dump_insertlist {
2082: my ($ext) = @_;
2083: open(XML,">/tmp/insertlist.xml.$ext");
2084: print XML ("<insertlist>");
2085: my $i=0;
2086:
2087: while (exists($insertlist{"$i.tag"})) {
2088: my $tag = $insertlist{"$i.tag"};
2089: print XML ("
2090: \t<tag name=\"$tag\">");
2091: if (defined($insertlist{"$tag.description"})) {
2092: print XML ("
2093: \t\t<description>".$insertlist{"$tag.description"}."</description>");
2094: }
2095: if (defined($insertlist{"$tag.color"})) {
2096: print XML ("
2097: \t\t<color>".$insertlist{"$tag.color"}."</color>");
2098: }
2099: if (defined($insertlist{"$tag.function"})) {
2100: print XML ("
2101: \t\t<insert_sub>".$insertlist{"$tag.function"}."</insert_sub>");
2102: }
2103: if (defined($insertlist{"$tag.show"})
2104: && $insertlist{"$tag.show"} ne 'yes') {
2105: print XML ("
2106: \t\t<show>".$insertlist{"$tag.show"}."</show>");
2107: }
2108: if (defined($insertlist{"$tag.helpfile"})) {
2109: print XML ("
2110: \t\t<help>
2111: \t\t\t<file>".$insertlist{"$tag.helpfile"}."</file>");
2112: if ($insertlist{"$tag.helpdesc"} ne '') {
2113: print XML ("
2114: \t\t\t<description>".$insertlist{"$tag.helpdesc"}."</description>");
2115: }
2116: print XML ("
2117: \t\t</help>");
2118: }
2119: if (defined($insertlist{"$tag.which"})) {
2120: print XML ("
2121: \t\t<allow>".join(',',sort(@{ $insertlist{"$tag.which"} }))."</allow>");
2122: }
2123: print XML ("
2124: \t</tag>");
2125: $i++;
2126: }
2127: print XML ("\n</insertlist>\n");
2128: close(XML);
2129: }
2130:
2131: sub description {
2132: my ($token)=@_;
2133: my $tag = &get_tag($token);
2134: return $insertlist{$tag.'.description'};
2135: }
2136:
2137: # Returns a list containing the help file, and the description
2138: sub helpinfo {
2139: my ($token)=@_;
2140: my $tag = &get_tag($token);
2141: return ($insertlist{$tag.'.helpfile'}, $insertlist{$tag.'.helpdesc'});
2142: }
2143:
2144: sub get_tag {
2145: my ($token)=@_;
2146: my $tagnum;
2147: my $tag=$token->[1];
2148: foreach my $namespace (reverse(@Apache::lonxml::namespace)) {
2149: my $testtag = $namespace.'::'.$tag;
2150: $tagnum = $insertlist{"$testtag.num"};
2151: last if (defined($tagnum));
2152: }
2153: if (!defined($tagnum)) {
2154: $tagnum = $Apache::lonxml::insertlist{"$tag.num"};
2155: }
2156: return $insertlist{"$tagnum.tag"};
2157: }
2158:
2159: ############################################################
2160: # PDF-FORM-METHODS
2161:
2162: =pod
2163:
2164: =item &print_pdf_radiobutton(fieldname, value, text)
2165:
2166: Returns a latexline to generate a PDF-Form-Radiobutton with Text.
2167:
2168: $fieldname: PDF internalname of the radiobutton
2169: $value: Value of radiobutton (read when dumping the PDF data)
2170: $text: Text on the rightside of the radiobutton
2171:
2172: =cut
2173: sub print_pdf_radiobutton {
2174: my $result = '';
2175: my ($fieldName, $value, $text) = @_;
2176: $result .= '\begin{tabularx}{\textwidth}{p{0cm}X}'."\n";
2177: $result .= '\radioButton[\symbolchoice{circle}]{'.
2178: $fieldName.'}{10bp}{10bp}{'.$value.'}&'.$text."\n";
2179: $result .= '\end{tabularx}' . "\n";
2180: $result .= '\hspace{2mm}' . "\n";
2181: return $result;
2182: }
2183:
2184:
2185: =pod
2186:
2187: =item &print_pdf_start_combobox(fieldname)
2188:
2189: Starts a latexline to generate a PDF-Form-Combobox with text.
2190:
2191: $fieldname: PDF internal name of the Combobox
2192:
2193: =cut
2194: sub print_pdf_start_combobox {
2195: my $result;
2196: my ($fieldName) = @_;
2197: $result .= '\begin{tabularx}{\textwidth}{p{2.5cm}X}'."\n";
2198: $result .= '\comboBox[]{'.$fieldName.'}{2.3cm}{14bp}{'; #
2199:
2200: return $result;
2201: }
2202:
2203:
2204: =pod
2205:
2206: =item &print_pdf_add_combobox_option(options)
2207:
2208: Generates a latexline to add Options to a PDF-Form-ComboBox.
2209:
2210: $option: PDF internal name of the Combobox-Option
2211:
2212: =cut
2213: sub print_pdf_add_combobox_option {
2214:
2215: my $result;
2216: my ($option) = @_;
2217:
2218: $result .= '('.$option.')';
2219:
2220: return $result;
2221: }
2222:
2223:
2224: =pod
2225:
2226: =item &print_pdf_end_combobox(text) {
2227:
2228: Returns latexcode to end a PDF-Form-Combobox with text.
2229:
2230: =cut
2231: sub print_pdf_end_combobox {
2232: my $result;
2233: my ($text) = @_;
2234:
2235: $result .= '}&'.$text."\\\\\n";
2236: $result .= '\end{tabularx}' . "\n";
2237: $result .= '\hspace{2mm}' . "\n";
2238: return $result;
2239: }
2240:
2241:
2242: =pod
2243:
2244: =item &print_pdf_hiddenField(fieldname, user, domain)
2245:
2246: Returns a latexline to generate a PDF-Form-hiddenField with userdata.
2247:
2248: $fieldname label for hiddentextfield
2249: $user: name of user
2250: $domain: domain of user
2251:
2252: =cut
2253: sub print_pdf_hiddenfield {
2254: my $result;
2255: my ($fieldname, $user, $domain) = @_;
2256:
2257: $result .= '\textField [\F{\FHidden}\F{-\FPrint}\V{'.$domain.'&'.$user.'}]{'.$fieldname.'}{0in}{0in}'."\n";
2258:
2259: return $result;
2260: }
2261:
2262: 1;
2263: __END__
2264:
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