1: # The LearningOnline Network with CAPA
2: # XML Parser Module
3: #
4: # $Id: lonxml.pm,v 1.484.2.2 2008/10/24 19:36:40 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:
41: package Apache::lonxml;
42: use vars
43: qw(@pwd @outputstack $redirection $import @extlinks $metamode $evaluate %insertlist @namespace $errorcount $warningcount);
44: use strict;
45: use LONCAPA;
46: use HTML::LCParser();
47: use HTML::TreeBuilder();
48: use HTML::Entities();
49: use Safe();
50: use Safe::Hole();
51: use Math::Cephes();
52: use Math::Random();
53: use Opcode();
54: use POSIX qw(strftime);
55: use Time::HiRes qw( gettimeofday tv_interval );
56: use Symbol();
57:
58: sub register {
59: my ($space,@taglist) = @_;
60: foreach my $temptag (@taglist) {
61: push(@{ $Apache::lonxml::alltags{$temptag} },$space);
62: }
63: }
64:
65: sub deregister {
66: my ($space,@taglist) = @_;
67: foreach my $temptag (@taglist) {
68: my $tempspace = $Apache::lonxml::alltags{$temptag}[-1];
69: if ($tempspace eq $space) {
70: pop(@{ $Apache::lonxml::alltags{$temptag} });
71: }
72: }
73: #&printalltags();
74: }
75:
76: use Apache::Constants qw(:common);
77: use Apache::lontexconvert();
78: use Apache::style();
79: use Apache::run();
80: use Apache::londefdef();
81: use Apache::scripttag();
82: use Apache::languagetags();
83: use Apache::edit();
84: use Apache::inputtags();
85: use Apache::outputtags();
86: use Apache::lonnet;
87: use Apache::File();
88: use Apache::loncommon();
89: use Apache::lonfeedback();
90: use Apache::lonmsg();
91: use Apache::loncacc();
92: use Apache::lonmaxima();
93: use Apache::lonlocal;
94:
95: #==================================== Main subroutine: xmlparse
96:
97: #debugging control, to turn on debugging modify the correct handler
98:
99: $Apache::lonxml::debug=0;
100:
101: # keeps count of the number of warnings and errors generated in a parse
102: $warningcount=0;
103: $errorcount=0;
104:
105: #path to the directory containing the file currently being processed
106: @pwd=();
107:
108: #these two are used for capturing a subset of the output for later processing,
109: #don't touch them directly use &startredirection and &endredirection
110: @outputstack = ();
111: $redirection = 0;
112:
113: #controls wheter the <import> tag actually does
114: $import = 1;
115: @extlinks=();
116:
117: # meta mode is a bit weird only some output is to be turned off
118: #<output> tag turns metamode off (defined in londefdef.pm)
119: $metamode = 0;
120:
121: # turns on and of run::evaluate actually derefencing var refs
122: $evaluate = 1;
123:
124: # data structure for eidt mode, determines what tags can go into what other tags
125: %insertlist=();
126:
127: # stores the list of active tag namespaces
128: @namespace=();
129:
130: # stores all Scrit Vars displays for later showing
131: my @script_var_displays=();
132:
133: # a pointer the the Apache request object
134: $Apache::lonxml::request='';
135:
136: # a problem number counter, and check on ether it is used
137: $Apache::lonxml::counter=1;
138: $Apache::lonxml::counter_changed=0;
139:
140: # Part counter hash. In analysis mode, the
141: # problems can use this to record which parts increment the counter
142: # by how much. The counter subs will maintain this hash via
143: # their optional part parameters. Note that the assumption is that
144: # analysis is done in one request and therefore it is not necessary to
145: # save this information request-to-request.
146:
147:
148: %Apache::lonxml::counters_per_part = ();
149:
150: #internal check on whether to look at style defs
151: $Apache::lonxml::usestyle=1;
152:
153: #locations used to store the parameter string for style substitutions
154: $Apache::lonxml::style_values='';
155: $Apache::lonxml::style_end_values='';
156:
157: #array of ssi calls that need to occur after we are done parsing
158: @Apache::lonxml::ssi_info=();
159:
160: #should we do the postag variable interpolation
161: $Apache::lonxml::post_evaluate=1;
162:
163: #a header message to emit in the case of any generated warning or errors
164: $Apache::lonxml::warnings_error_header='';
165:
166: # Control whether or not LaTeX symbols should be substituted for their
167: # \ style equivalents...this may be turned off e.g. in an verbatim
168: # environment.
169:
170: $Apache::lonxml::substitute_LaTeX_symbols = 1; # Starts out on.
171:
172: sub enable_LaTeX_substitutions {
173: $Apache::lonxml::substitute_LaTeX_symbols = 1;
174: }
175: sub disable_LaTeX_substitutions {
176: $Apache::lonxml::substitute_LaTeX_symbols = 0;
177: }
178:
179: sub xmlend {
180: my ($target,$parser)=@_;
181: my $mode='xml';
182: my $status='OPEN';
183: if ($Apache::lonhomework::parsing_a_problem ||
184: $Apache::lonhomework::parsing_a_task ) {
185: $mode='problem';
186: $status=$Apache::inputtags::status[-1];
187: }
188: my $discussion;
189: &Apache::loncommon::get_unprocessed_cgi($ENV{'QUERY_STRING'},
190: ['LONCAPA_INTERNAL_no_discussion']);
191: if (! exists($env{'form.LONCAPA_INTERNAL_no_discussion'}) ||
192: $env{'form.LONCAPA_INTERNAL_no_discussion'} ne 'true') {
193: $discussion=&Apache::lonfeedback::list_discussion($mode,$status);
194: }
195: if ($target eq 'tex') {
196: $discussion.='<tex>\keephidden{ENDOFPROBLEM}\vskip 0.5mm\noindent\makebox[\textwidth/$number_of_columns][b]{\hrulefill}\end{document}</tex>';
197: &Apache::lonxml::newparser($parser,\$discussion,'');
198: return '';
199: }
200:
201: return $discussion;
202: }
203:
204: sub tokeninputfield {
205: my $defhost=$Apache::lonnet::perlvar{'lonHostID'};
206: $defhost=~tr/a-z/A-Z/;
207: return (<<ENDINPUTFIELD)
208: <script type="text/javascript">
209: function updatetoken() {
210: var comp=new Array;
211: var barcode=unescape(document.tokeninput.barcode.value);
212: comp=barcode.split('*');
213: if (typeof(comp[0])!="undefined") {
214: document.tokeninput.codeone.value=comp[0];
215: }
216: if (typeof(comp[1])!="undefined") {
217: document.tokeninput.codetwo.value=comp[1];
218: }
219: if (typeof(comp[2])!="undefined") {
220: comp[2]=comp[2].toUpperCase();
221: document.tokeninput.codethree.value=comp[2];
222: }
223: document.tokeninput.barcode.value='';
224: }
225: </script>
226: <form method="post" name="tokeninput">
227: <table border="2" bgcolor="#FFFFBB">
228: <tr><th>DocID Checkin</th></tr>
229: <tr><td>
230: <table>
231: <tr>
232: <td>Scan in Barcode</td>
233: <td><input type="text" size="22" name="barcode"
234: onChange="updatetoken()"/></td>
235: </tr>
236: <tr><td><i>or</i> Type in DocID</td>
237: <td>
238: <input type="text" size="5" name="codeone" />
239: <b><font size="+2">*</font></b>
240: <input type="text" size="5" name="codetwo" />
241: <b><font size="+2">*</font></b>
242: <input type="text" size="10" name="codethree" value="$defhost"
243: onChange="this.value=this.value.toUpperCase()" />
244: </td></tr>
245: </table>
246: </td></tr>
247: <tr><td><input type="submit" value="Check in DocID" /></td></tr>
248: </table>
249: </form>
250: ENDINPUTFIELD
251: }
252:
253: sub maketoken {
254: my ($symb,$tuname,$tudom,$tcrsid)=@_;
255: unless ($symb) {
256: $symb=&Apache::lonnet::symbread();
257: }
258: unless ($tuname) {
259: $tuname=$env{'user.name'};
260: $tudom=$env{'user.domain'};
261: $tcrsid=$env{'request.course.id'};
262: }
263:
264: return &Apache::lonnet::checkout($symb,$tuname,$tudom,$tcrsid);
265: }
266:
267: sub printtokenheader {
268: my ($target,$token,$tsymb,$tcrsid,$tudom,$tuname)=@_;
269: unless ($token) { return ''; }
270:
271: my ($symb,$courseid,$domain,$name) = &Apache::lonnet::whichuser();
272: unless ($tsymb) {
273: $tsymb=$symb;
274: }
275: unless ($tuname) {
276: $tuname=$name;
277: $tudom=$domain;
278: $tcrsid=$courseid;
279: }
280:
281: my $plainname=&Apache::loncommon::plainname($tuname,$tudom);
282:
283: if ($target eq 'web') {
284: my %idhash=&Apache::lonnet::idrget($tudom,($tuname));
285: return
286: '<img align="right" src="/cgi-bin/barcode.png?encode='.$token.'" />'.
287: &mt('Checked out for').' '.$plainname.
288: '<br />'.&mt('User').': '.$tuname.' at '.$tudom.
289: '<br />'.&mt('ID').': '.$idhash{$tuname}.
290: '<br />'.&mt('CourseID').': '.$tcrsid.
291: '<br />'.&mt('Course').': '.$env{'course.'.$tcrsid.'.description'}.
292: '<br />'.&mt('DocID').': '.$token.
293: '<br />'.&mt('Time').': '.&Apache::lonlocal::locallocaltime().'<hr />';
294: } else {
295: return $token;
296: }
297: }
298:
299: sub printalltags {
300: my $temp;
301: foreach $temp (sort keys %Apache::lonxml::alltags) {
302: &Apache::lonxml::debug("$temp -- ".
303: join(',',@{ $Apache::lonxml::alltags{$temp} }));
304: }
305: }
306:
307: sub xmlparse {
308: my ($request,$target,$content_file_string,$safeinit,%style_for_target) = @_;
309:
310: &setup_globals($request,$target);
311: &Apache::inputtags::initialize_inputtags();
312: &Apache::bridgetask::initialize_bridgetask();
313: &Apache::outputtags::initialize_outputtags();
314: &Apache::edit::initialize_edit();
315: &Apache::londefdef::initialize_londefdef();
316:
317: #
318: # do we have a course style file?
319: #
320:
321: if ($env{'request.course.id'} && $env{'request.state'} ne 'construct') {
322: my $bodytext=
323: $env{'course.'.$env{'request.course.id'}.'.default_xml_style'};
324: if ($bodytext) {
325: foreach my $file (split(',',$bodytext)) {
326: my $location=&Apache::lonnet::filelocation('',$file);
327: my $styletext=&Apache::lonnet::getfile($location);
328: if ($styletext ne '-1') {
329: %style_for_target = (%style_for_target,
330: &Apache::style::styleparser($target,$styletext));
331: }
332: }
333: }
334: } elsif ($env{'construct.style'}
335: && ($env{'request.state'} eq 'construct')) {
336: my $location=&Apache::lonnet::filelocation('',$env{'construct.style'});
337: my $styletext=&Apache::lonnet::getfile($location);
338: if ($styletext ne '-1') {
339: %style_for_target = (%style_for_target,
340: &Apache::style::styleparser($target,$styletext));
341: }
342: }
343: #&printalltags();
344: my @pars = ();
345: my $pwd=$env{'request.filename'};
346: $pwd =~ s:/[^/]*$::;
347: &newparser(\@pars,\$content_file_string,$pwd);
348:
349: my $safeeval = new Safe;
350: my $safehole = new Safe::Hole;
351: &init_safespace($target,$safeeval,$safehole,$safeinit);
352: #-------------------- Redefinition of the target in the case of compound target
353:
354: ($target, my @tenta) = split('&&',$target);
355:
356: my @stack = ();
357: my @parstack = ();
358: &initdepth();
359: &init_alarm();
360: my $finaloutput = &inner_xmlparse($target,\@stack,\@parstack,\@pars,
361: $safeeval,\%style_for_target,1);
362:
363: if (@stack) {
364: &warning(&mt('At end of file some tags were still left unclosed:').
365: ' <tt><'.join('></tt>, <tt><',reverse(@stack)).
366: '></tt>');
367: }
368: if ($env{'request.uri'}) {
369: &writeallows($env{'request.uri'});
370: }
371: &do_registered_ssi();
372: if ($Apache::lonxml::counter_changed) { &store_counter() }
373:
374: &clean_safespace($safeeval);
375:
376: if (@script_var_displays) {
377: $finaloutput .= join('',@script_var_displays);
378: undef(@script_var_displays);
379: }
380: &init_state();
381: if ($env{'form.return_only_error_and_warning_counts'}) {
382: if ($env{'request.filename'}=~/\.(html|htm|xml)$/i) {
383: my $error=&verify_html($content_file_string);
384: if ($error) { $errorcount++; }
385: }
386: return "$errorcount:$warningcount";
387: }
388: return $finaloutput;
389: }
390:
391: sub latex_special_symbols {
392: my ($string,$where)=@_;
393: #
394: # If e.g. in verbatim mode, then don't substitute.
395: # but return original string.
396: #
397: if (!($Apache::lonxml::substitute_LaTeX_symbols)) {
398: return $string;
399: }
400: if ($where eq 'header') {
401: $string =~ s/\\/\$\\backslash\$/g; # \ -> $\backslash$ per LaTex line by line pg 10.
402: $string =~ s/(\$|%|\{|\})/\\$1/g;
403: $string=&Apache::lonprintout::character_chart($string);
404: # any & or # leftover should be safe to just escape
405: $string=~s/([^\\])\&/$1\\\&/g;
406: $string=~s/([^\\])\#/$1\\\#/g;
407: $string =~ s/_/\\_/g; # _ -> \_
408: $string =~ s/\^/\\\^{}/g; # ^ -> \^{}
409: } else {
410: $string=~s/\\/\\ensuremath{\\backslash}/g;
411: $string=~s/\\\%|\%/\\\%/g;
412: $string=~s/\\{|{/\\{/g;
413: $string=~s/\\}|}/\\}/g;
414: $string=~s/\\ensuremath\\{\\backslash\\}/\\ensuremath{\\backslash}/g;
415: $string=~s/\\\$|\$/\\\$/g;
416: $string=~s/\\\_|\_/\\\_/g;
417: $string=~s/([^\\]|^)(\~|\^)/$1\\$2\\strut /g;
418: $string=~s/(>|<)/\\ensuremath\{$1\}/g; #more or less
419: $string=&Apache::lonprintout::character_chart($string);
420: # any & or # leftover should be safe to just escape
421: $string=~s/\\\&|\&/\\\&/g;
422: $string=~s/\\\#|\#/\\\#/g;
423: $string=~s/\|/\$\\mid\$/g;
424: #single { or } How to escape?
425: }
426: return $string;
427: }
428:
429: sub inner_xmlparse {
430: my ($target,$stack,$parstack,$pars,$safeeval,$style_for_target,$start)=@_;
431: my $finaloutput = '';
432: my $result;
433: my $token;
434: my $dontpop=0;
435: my $startredirection = $Apache::lonxml::redirection;
436: while ( $#$pars > -1 ) {
437: while ($token = $$pars['-1']->get_token) {
438: if (($token->[0] eq 'T') || ($token->[0] eq 'C') ) {
439: if ($metamode<1) {
440: my $text=$token->[1];
441: if ($token->[0] eq 'C' && $target eq 'tex') {
442: $text = '';
443: # $text = '%'.$text."\n";
444: }
445: $result.=$text;
446: }
447: } elsif (($token->[0] eq 'D')) {
448: if ($metamode<1 && $target eq 'web') {
449: my $text=$token->[1];
450: $result.=$text;
451: }
452: } elsif ($token->[0] eq 'PI') {
453: if ($metamode<1 && $target eq 'web') {
454: $result=$token->[2];
455: }
456: } elsif ($token->[0] eq 'S') {
457: # add tag to stack
458: push (@$stack,$token->[1]);
459: # add parameters list to another stack
460: push (@$parstack,&parstring($token));
461: &increasedepth($token);
462: if ($Apache::lonxml::usestyle &&
463: exists($$style_for_target{$token->[1]})) {
464: $Apache::lonxml::usestyle=0;
465: my $string=$$style_for_target{$token->[1]}.
466: '<LONCAPA_INTERNAL_TURN_STYLE_ON />';
467: &Apache::lonxml::newparser($pars,\$string);
468: $Apache::lonxml::style_values=$$parstack[-1];
469: $Apache::lonxml::style_end_values=$$parstack[-1];
470: } else {
471: $result = &callsub("start_$token->[1]", $target, $token, $stack,
472: $parstack, $pars, $safeeval, $style_for_target);
473: }
474: } elsif ($token->[0] eq 'E') {
475: if ($Apache::lonxml::usestyle &&
476: exists($$style_for_target{'/'."$token->[1]"})) {
477: $Apache::lonxml::usestyle=0;
478: my $string=$$style_for_target{'/'.$token->[1]}.
479: '<LONCAPA_INTERNAL_TURN_STYLE_ON end="'.$token->[1].'" />';
480: &Apache::lonxml::newparser($pars,\$string);
481: $Apache::lonxml::style_values=$Apache::lonxml::style_end_values;
482: $Apache::lonxml::style_end_values='';
483: $dontpop=1;
484: } else {
485: #clear out any tags that didn't end
486: while ($token->[1] ne $$stack['-1'] && ($#$stack > -1)) {
487: my $lasttag=$$stack[-1];
488: if ($token->[1] =~ /^\Q$lasttag\E$/i) {
489: &Apache::lonxml::warning(&mt('Using tag [_1] on line [_2] as end tag to [_3]','</'.$token->[1].'>','.$token->[3].','<'.$$stack[-1].'>'));
490: last;
491: } else {
492: &Apache::lonxml::warning(&mt('Found tag [_1] on line [_2] when looking for [_3] in file.','</'.$token->[1].'>',$token->[3],'</'.$$stack[-1].'>'));
493: &end_tag($stack,$parstack,$token);
494: }
495: }
496: $result = &callsub("end_$token->[1]", $target, $token, $stack,
497: $parstack, $pars,$safeeval, $style_for_target);
498: }
499: } else {
500: &Apache::lonxml::error("Unknown token event :$token->[0]:$token->[1]:");
501: }
502: #evaluate variable refs in result
503: if ($Apache::lonxml::post_evaluate &&$result ne "") {
504: my $extras;
505: if (!$Apache::lonxml::usestyle) {
506: $extras=$Apache::lonxml::style_values;
507: }
508: if ($token->[1] ne 'translated') {
509: if ( $#$parstack > -1 ) {
510: $result=&Apache::run::evaluate($result,$safeeval,$extras.$$parstack[-1]);
511: } else {
512: $result=&Apache::run::evaluate($result,$safeeval,$extras);
513: }
514: }
515: }
516: $Apache::lonxml::post_evaluate=1;
517:
518: if (($token->[0] eq 'T') || ($token->[0] eq 'C') || ($token->[0] eq 'D') ) {
519: #Style file definitions should be correct
520: if ($target eq 'tex' && ($Apache::lonxml::usestyle)) {
521: $result=&latex_special_symbols($result);
522: }
523: }
524:
525: if ($Apache::lonxml::redirection) {
526: $Apache::lonxml::outputstack['-1'] .= $result;
527: } else {
528: $finaloutput.=$result;
529: }
530: $result = '';
531:
532: if ($token->[0] eq 'E' && !$dontpop) {
533: &end_tag($stack,$parstack,$token);
534: }
535: $dontpop=0;
536: }
537: if ($#$pars > -1) {
538: pop @$pars;
539: pop @Apache::lonxml::pwd;
540: }
541: }
542:
543: # if ($target eq 'meta') {
544: # $finaloutput.=&endredirection;
545: # }
546:
547: if ( $start && $target eq 'grade') { &endredirection(); }
548: if ( $Apache::lonxml::redirection > $startredirection) {
549: while ($Apache::lonxml::redirection > $startredirection) {
550: $finaloutput .= &endredirection();
551: }
552: }
553: if (($ENV{'QUERY_STRING'}) && ($target eq 'web')) {
554: $finaloutput=&afterburn($finaloutput);
555: }
556: return $finaloutput;
557: }
558:
559: ##
560: ## Looks to see if there is a subroutine defined for this tag. If so, call it,
561: ## otherwise do not call it as we do not know what it is.
562: ##
563: sub callsub {
564: my ($sub,$target,$token,$tagstack,$parstack,$parser,$safeeval,$style)=@_;
565: my $currentstring='';
566: my $nodefault;
567: {
568: my $sub1;
569: no strict 'refs';
570: my $tag=$token->[1];
571: # get utterly rid of extended html tags
572: if ($tag=~/^x\-/i) { return ''; }
573: my $space=$Apache::lonxml::alltags{$tag}[-1];
574: if (!$space) {
575: $tag=~tr/A-Z/a-z/;
576: $sub=~tr/A-Z/a-z/;
577: $space=$Apache::lonxml::alltags{$tag}[-1]
578: }
579:
580: my $deleted=0;
581: if (($token->[0] eq 'S') && ($target eq 'modified')) {
582: $deleted=&Apache::edit::handle_delete($space,$target,$token,$tagstack,
583: $parstack,$parser,$safeeval,
584: $style);
585: }
586: if (!$deleted) {
587: if ($space) {
588: #&Apache::lonxml::debug("Calling sub $sub in $space $metamode");
589: $sub1="$space\:\:$sub";
590: ($currentstring,$nodefault) = &$sub1($target,$token,$tagstack,
591: $parstack,$parser,$safeeval,
592: $style);
593: } else {
594: if ($target eq 'tex') {
595: # throw away tag name
596: return '';
597: }
598: #&Apache::lonxml::debug("NOT Calling sub $sub in $space $metamode");
599: if ($metamode <1) {
600: if (defined($token->[4]) && ($metamode < 1)) {
601: $currentstring = $token->[4];
602: } else {
603: $currentstring = $token->[2];
604: }
605: }
606: }
607: # &Apache::lonxml::debug("nodefalt:$nodefault:");
608: if ($currentstring eq '' && $nodefault eq '') {
609: if ($target eq 'edit') {
610: #&Apache::lonxml::debug("doing default edit for $token->[1]");
611: if ($token->[0] eq 'S') {
612: $currentstring = &Apache::edit::tag_start($target,$token);
613: } elsif ($token->[0] eq 'E') {
614: $currentstring = &Apache::edit::tag_end($target,$token);
615: }
616: }
617: }
618: if ($target eq 'modified' && $nodefault eq '') {
619: if ($currentstring eq '') {
620: if ($token->[0] eq 'S') {
621: $currentstring = $token->[4];
622: } elsif ($token->[0] eq 'E') {
623: $currentstring = $token->[2];
624: } else {
625: $currentstring = $token->[2];
626: }
627: }
628: if ($token->[0] eq 'S') {
629: $currentstring.=&Apache::edit::handle_insert();
630: } elsif ($token->[0] eq 'E') {
631: $currentstring.=&Apache::edit::handle_insertafter($token->[1]);
632: }
633: }
634: }
635: use strict 'refs';
636: }
637: return $currentstring;
638: }
639:
640: {
641: my %state;
642:
643: sub init_state {
644: undef(%state);
645: }
646:
647: sub set_state {
648: my ($key,$value) = @_;
649: $state{$key} = $value;
650: return $value;
651: }
652: sub get_state {
653: my ($key) = @_;
654: return $state{$key};
655: }
656: }
657:
658: sub setup_globals {
659: my ($request,$target)=@_;
660: $Apache::lonxml::request=$request;
661: $errorcount=0;
662: $warningcount=0;
663: $Apache::lonxml::default_homework_loaded=0;
664: $Apache::lonxml::usestyle=1;
665: &init_counter();
666: &clear_bubble_lines_for_part();
667: &init_state();
668: &set_state('target',$target);
669: @Apache::lonxml::pwd=();
670: @Apache::lonxml::extlinks=();
671: @script_var_displays=();
672: @Apache::lonxml::ssi_info=();
673: $Apache::lonxml::post_evaluate=1;
674: $Apache::lonxml::warnings_error_header='';
675: $Apache::lonxml::substitute_LaTeX_symbols = 1;
676: if ($target eq 'meta') {
677: $Apache::lonxml::redirection = 0;
678: $Apache::lonxml::metamode = 1;
679: $Apache::lonxml::evaluate = 1;
680: $Apache::lonxml::import = 0;
681: } elsif ($target eq 'answer') {
682: $Apache::lonxml::redirection = 0;
683: $Apache::lonxml::metamode = 1;
684: $Apache::lonxml::evaluate = 1;
685: $Apache::lonxml::import = 1;
686: } elsif ($target eq 'grade') {
687: &startredirection(); #ended in inner_xmlparse on exit
688: $Apache::lonxml::metamode = 0;
689: $Apache::lonxml::evaluate = 1;
690: $Apache::lonxml::import = 1;
691: } elsif ($target eq 'modified') {
692: $Apache::lonxml::redirection = 0;
693: $Apache::lonxml::metamode = 0;
694: $Apache::lonxml::evaluate = 0;
695: $Apache::lonxml::import = 0;
696: } elsif ($target eq 'edit') {
697: $Apache::lonxml::redirection = 0;
698: $Apache::lonxml::metamode = 0;
699: $Apache::lonxml::evaluate = 0;
700: $Apache::lonxml::import = 0;
701: } elsif ($target eq 'analyze') {
702: $Apache::lonxml::redirection = 0;
703: $Apache::lonxml::metamode = 0;
704: $Apache::lonxml::evaluate = 1;
705: $Apache::lonxml::import = 1;
706: } else {
707: $Apache::lonxml::redirection = 0;
708: $Apache::lonxml::metamode = 0;
709: $Apache::lonxml::evaluate = 1;
710: $Apache::lonxml::import = 1;
711: }
712: }
713:
714: sub init_safespace {
715: my ($target,$safeeval,$safehole,$safeinit) = @_;
716: $safeeval->deny_only(':dangerous');
717: $safeeval->reval('use Math::Complex;');
718: $safeeval->permit_only(":default");
719: $safeeval->permit("entereval");
720: $safeeval->permit(":base_math");
721: $safeeval->permit("sort");
722: $safeeval->permit("time");
723: $safeeval->permit("caller");
724: $safeeval->deny("rand");
725: $safeeval->deny("srand");
726: $safeeval->deny(":base_io");
727: $safehole->wrap(\&Apache::scripttag::xmlparse,$safeeval,'&xmlparse');
728: $safehole->wrap(\&Apache::outputtags::multipart,$safeeval,'&multipart');
729: $safehole->wrap(\&Apache::lonnet::EXT,$safeeval,'&EXT');
730: $safehole->wrap(\&Apache::chemresponse::chem_standard_order,$safeeval,
731: '&chem_standard_order');
732: $safehole->wrap(\&Apache::response::check_status,$safeeval,'&check_status');
733: $safehole->wrap(\&Apache::response::implicit_multiplication,$safeeval,'&implicit_multiplication');
734:
735: $safehole->wrap(\&Apache::lonmaxima::maxima_eval,$safeeval,'&maxima_eval');
736: $safehole->wrap(\&Apache::lonmaxima::maxima_check,$safeeval,'&maxima_check');
737: $safehole->wrap(\&Apache::lonmaxima::maxima_cas_formula_fix,$safeeval,
738: '&maxima_cas_formula_fix');
739:
740: $safehole->wrap(\&Apache::caparesponse::capa_formula_fix,$safeeval,
741: '&capa_formula_fix');
742:
743: $safehole->wrap(\&Apache::lonlocal::locallocaltime,$safeeval,
744: '&locallocaltime');
745:
746: $safehole->wrap(\&Math::Cephes::asin,$safeeval,'&asin');
747: $safehole->wrap(\&Math::Cephes::acos,$safeeval,'&acos');
748: $safehole->wrap(\&Math::Cephes::atan,$safeeval,'&atan');
749: $safehole->wrap(\&Math::Cephes::sinh,$safeeval,'&sinh');
750: $safehole->wrap(\&Math::Cephes::cosh,$safeeval,'&cosh');
751: $safehole->wrap(\&Math::Cephes::tanh,$safeeval,'&tanh');
752: $safehole->wrap(\&Math::Cephes::asinh,$safeeval,'&asinh');
753: $safehole->wrap(\&Math::Cephes::acosh,$safeeval,'&acosh');
754: $safehole->wrap(\&Math::Cephes::atanh,$safeeval,'&atanh');
755: $safehole->wrap(\&Math::Cephes::erf,$safeeval,'&erf');
756: $safehole->wrap(\&Math::Cephes::erfc,$safeeval,'&erfc');
757: $safehole->wrap(\&Math::Cephes::j0,$safeeval,'&j0');
758: $safehole->wrap(\&Math::Cephes::j1,$safeeval,'&j1');
759: $safehole->wrap(\&Math::Cephes::jn,$safeeval,'&jn');
760: $safehole->wrap(\&Math::Cephes::jv,$safeeval,'&jv');
761: $safehole->wrap(\&Math::Cephes::y0,$safeeval,'&y0');
762: $safehole->wrap(\&Math::Cephes::y1,$safeeval,'&y1');
763: $safehole->wrap(\&Math::Cephes::yn,$safeeval,'&yn');
764: $safehole->wrap(\&Math::Cephes::yv,$safeeval,'&yv');
765:
766: $safehole->wrap(\&Math::Cephes::bdtr ,$safeeval,'&bdtr' );
767: $safehole->wrap(\&Math::Cephes::bdtrc ,$safeeval,'&bdtrc' );
768: $safehole->wrap(\&Math::Cephes::bdtri ,$safeeval,'&bdtri' );
769: $safehole->wrap(\&Math::Cephes::btdtr ,$safeeval,'&btdtr' );
770: $safehole->wrap(\&Math::Cephes::chdtr ,$safeeval,'&chdtr' );
771: $safehole->wrap(\&Math::Cephes::chdtrc,$safeeval,'&chdtrc');
772: $safehole->wrap(\&Math::Cephes::chdtri,$safeeval,'&chdtri');
773: $safehole->wrap(\&Math::Cephes::fdtr ,$safeeval,'&fdtr' );
774: $safehole->wrap(\&Math::Cephes::fdtrc ,$safeeval,'&fdtrc' );
775: $safehole->wrap(\&Math::Cephes::fdtri ,$safeeval,'&fdtri' );
776: $safehole->wrap(\&Math::Cephes::gdtr ,$safeeval,'&gdtr' );
777: $safehole->wrap(\&Math::Cephes::gdtrc ,$safeeval,'&gdtrc' );
778: $safehole->wrap(\&Math::Cephes::nbdtr ,$safeeval,'&nbdtr' );
779: $safehole->wrap(\&Math::Cephes::nbdtrc,$safeeval,'&nbdtrc');
780: $safehole->wrap(\&Math::Cephes::nbdtri,$safeeval,'&nbdtri');
781: $safehole->wrap(\&Math::Cephes::ndtr ,$safeeval,'&ndtr' );
782: $safehole->wrap(\&Math::Cephes::ndtri ,$safeeval,'&ndtri' );
783: $safehole->wrap(\&Math::Cephes::pdtr ,$safeeval,'&pdtr' );
784: $safehole->wrap(\&Math::Cephes::pdtrc ,$safeeval,'&pdtrc' );
785: $safehole->wrap(\&Math::Cephes::pdtri ,$safeeval,'&pdtri' );
786: $safehole->wrap(\&Math::Cephes::stdtr ,$safeeval,'&stdtr' );
787: $safehole->wrap(\&Math::Cephes::stdtri,$safeeval,'&stdtri');
788:
789: $safehole->wrap(\&Math::Cephes::Matrix::mat,$safeeval,'&mat');
790: $safehole->wrap(\&Math::Cephes::Matrix::new,$safeeval,
791: '&Math::Cephes::Matrix::new');
792: $safehole->wrap(\&Math::Cephes::Matrix::coef,$safeeval,
793: '&Math::Cephes::Matrix::coef');
794: $safehole->wrap(\&Math::Cephes::Matrix::clr,$safeeval,
795: '&Math::Cephes::Matrix::clr');
796: $safehole->wrap(\&Math::Cephes::Matrix::add,$safeeval,
797: '&Math::Cephes::Matrix::add');
798: $safehole->wrap(\&Math::Cephes::Matrix::sub,$safeeval,
799: '&Math::Cephes::Matrix::sub');
800: $safehole->wrap(\&Math::Cephes::Matrix::mul,$safeeval,
801: '&Math::Cephes::Matrix::mul');
802: $safehole->wrap(\&Math::Cephes::Matrix::div,$safeeval,
803: '&Math::Cephes::Matrix::div');
804: $safehole->wrap(\&Math::Cephes::Matrix::inv,$safeeval,
805: '&Math::Cephes::Matrix::inv');
806: $safehole->wrap(\&Math::Cephes::Matrix::transp,$safeeval,
807: '&Math::Cephes::Matrix::transp');
808: $safehole->wrap(\&Math::Cephes::Matrix::simq,$safeeval,
809: '&Math::Cephes::Matrix::simq');
810: $safehole->wrap(\&Math::Cephes::Matrix::mat_to_vec,$safeeval,
811: '&Math::Cephes::Matrix::mat_to_vec');
812: $safehole->wrap(\&Math::Cephes::Matrix::vec_to_mat,$safeeval,
813: '&Math::Cephes::Matrix::vec_to_mat');
814: $safehole->wrap(\&Math::Cephes::Matrix::check,$safeeval,
815: '&Math::Cephes::Matrix::check');
816: $safehole->wrap(\&Math::Cephes::Matrix::check,$safeeval,
817: '&Math::Cephes::Matrix::check');
818:
819: # $safehole->wrap(\&Math::Cephes::new_fract,$safeeval,'&new_fract');
820: # $safehole->wrap(\&Math::Cephes::radd,$safeeval,'&radd');
821: # $safehole->wrap(\&Math::Cephes::rsub,$safeeval,'&rsub');
822: # $safehole->wrap(\&Math::Cephes::rmul,$safeeval,'&rmul');
823: # $safehole->wrap(\&Math::Cephes::rdiv,$safeeval,'&rdiv');
824: # $safehole->wrap(\&Math::Cephes::euclid,$safeeval,'&euclid');
825:
826: $safehole->wrap(\&Math::Random::random_beta,$safeeval,'&math_random_beta');
827: $safehole->wrap(\&Math::Random::random_chi_square,$safeeval,'&math_random_chi_square');
828: $safehole->wrap(\&Math::Random::random_exponential,$safeeval,'&math_random_exponential');
829: $safehole->wrap(\&Math::Random::random_f,$safeeval,'&math_random_f');
830: $safehole->wrap(\&Math::Random::random_gamma,$safeeval,'&math_random_gamma');
831: $safehole->wrap(\&Math::Random::random_multivariate_normal,$safeeval,'&math_random_multivariate_normal');
832: $safehole->wrap(\&Math::Random::random_multinomial,$safeeval,'&math_random_multinomial');
833: $safehole->wrap(\&Math::Random::random_noncentral_chi_square,$safeeval,'&math_random_noncentral_chi_square');
834: $safehole->wrap(\&Math::Random::random_noncentral_f,$safeeval,'&math_random_noncentral_f');
835: $safehole->wrap(\&Math::Random::random_normal,$safeeval,'&math_random_normal');
836: $safehole->wrap(\&Math::Random::random_permutation,$safeeval,'&math_random_permutation');
837: $safehole->wrap(\&Math::Random::random_permuted_index,$safeeval,'&math_random_permuted_index');
838: $safehole->wrap(\&Math::Random::random_uniform,$safeeval,'&math_random_uniform');
839: $safehole->wrap(\&Math::Random::random_poisson,$safeeval,'&math_random_poisson');
840: $safehole->wrap(\&Math::Random::random_uniform_integer,$safeeval,'&math_random_uniform_integer');
841: $safehole->wrap(\&Math::Random::random_negative_binomial,$safeeval,'&math_random_negative_binomial');
842: $safehole->wrap(\&Math::Random::random_binomial,$safeeval,'&math_random_binomial');
843: $safehole->wrap(\&Math::Random::random_seed_from_phrase,$safeeval,'&random_seed_from_phrase');
844: $safehole->wrap(\&Math::Random::random_set_seed_from_phrase,$safeeval,'&random_set_seed_from_phrase');
845: $safehole->wrap(\&Math::Random::random_get_seed,$safeeval,'&random_get_seed');
846: $safehole->wrap(\&Math::Random::random_set_seed,$safeeval,'&random_set_seed');
847: $safehole->wrap(\&Apache::loncommon::languages,$safeeval,'&languages');
848: $safehole->wrap(\&Apache::lonxml::error,$safeeval,'&LONCAPA_INTERNAL_ERROR');
849: $safehole->wrap(\&Apache::lonxml::debug,$safeeval,'&LONCAPA_INTERNAL_DEBUG');
850: $safehole->wrap(\&Apache::lonnet::logthis,$safeeval,'&LONCAPA_INTERNAL_LOGTHIS');
851: $safehole->wrap(\&Apache::inputtags::finalizeawards,$safeeval,'&LONCAPA_INTERNAL_FINALIZEAWARDS');
852: $safehole->wrap(\&Apache::caparesponse::get_sigrange,$safeeval,'&LONCAPA_INTERNAL_get_sigrange');
853: # use Data::Dumper;
854: # $safehole->wrap(\&Data::Dumper::Dumper,$safeeval,'&LONCAPA_INTERNAL_Dumper');
855: #need to inspect this class of ops
856: # $safeeval->deny(":base_orig");
857: $safeeval->permit("require");
858: $safeinit .= ';$external::target="'.$target.'";';
859: &Apache::run::run($safeinit,$safeeval);
860: &initialize_rndseed($safeeval);
861: }
862:
863: sub clean_safespace {
864: my ($safeeval) = @_;
865: delete_package_recurse($safeeval->{Root});
866: }
867:
868: sub delete_package_recurse {
869: my ($package) = @_;
870: my @subp;
871: {
872: no strict 'refs';
873: while (my ($key,$val) = each(%{*{"$package\::"}})) {
874: if (!defined($val)) { next; }
875: local (*ENTRY) = $val;
876: if (defined *ENTRY{HASH} && $key =~ /::$/ &&
877: $key ne "main::" && $key ne "<none>::")
878: {
879: my ($p) = $package ne "main" ? "$package\::" : "";
880: ($p .= $key) =~ s/::$//;
881: push(@subp,$p);
882: }
883: }
884: }
885: foreach my $p (@subp) {
886: delete_package_recurse($p);
887: }
888: Symbol::delete_package($package);
889: }
890:
891: sub initialize_rndseed {
892: my ($safeeval)=@_;
893: my $rndseed;
894: my ($symb,$courseid,$domain,$name) = &Apache::lonnet::whichuser();
895: $rndseed=&Apache::lonnet::rndseed($symb,$courseid,$domain,$name);
896: my $safeinit = '$external::randomseed="'.$rndseed.'";';
897: &Apache::lonxml::debug("Setting rndseed to $rndseed");
898: &Apache::run::run($safeinit,$safeeval);
899: }
900:
901: sub default_homework_load {
902: my ($safeeval)=@_;
903: &Apache::lonxml::debug('Loading default_homework');
904: my $default=&Apache::lonnet::getfile('/home/httpd/html/res/adm/includes/default_homework.lcpm');
905: if ($default eq -1) {
906: &Apache::lonxml::error("<b>Unable to find <i>default_homework.lcpm</i></b>");
907: } else {
908: &Apache::run::run($default,$safeeval);
909: $Apache::lonxml::default_homework_loaded=1;
910: }
911: }
912:
913: {
914: my $alarm_depth;
915: sub init_alarm {
916: alarm(0);
917: $alarm_depth=0;
918: }
919:
920: sub start_alarm {
921: if ($alarm_depth<1) {
922: my $old=alarm($Apache::lonnet::perlvar{'lonScriptTimeout'});
923: if ($old) {
924: &Apache::lonxml::error("Cancelled an alarm of $old, this shouldn't occur.");
925: }
926: }
927: $alarm_depth++;
928: }
929:
930: sub end_alarm {
931: $alarm_depth--;
932: if ($alarm_depth<1) { alarm(0); }
933: }
934: }
935: my $metamode_was;
936: sub startredirection {
937: if (!$Apache::lonxml::redirection) {
938: $metamode_was=$Apache::lonxml::metamode;
939: }
940: $Apache::lonxml::metamode=0;
941: $Apache::lonxml::redirection++;
942: push (@Apache::lonxml::outputstack, '');
943: }
944:
945: sub endredirection {
946: if (!$Apache::lonxml::redirection) {
947: &Apache::lonxml::error("Endredirection was called before a startredirection, perhaps you have unbalanced tags. Some debugging information:".join ":",caller);
948: return '';
949: }
950: $Apache::lonxml::redirection--;
951: if (!$Apache::lonxml::redirection) {
952: $Apache::lonxml::metamode=$metamode_was;
953: }
954: pop @Apache::lonxml::outputstack;
955: }
956: sub in_redirection {
957: return ($Apache::lonxml::redirection > 0)
958: }
959:
960: sub end_tag {
961: my ($tagstack,$parstack,$token)=@_;
962: pop(@$tagstack);
963: pop(@$parstack);
964: &decreasedepth($token);
965: }
966:
967: sub initdepth {
968: @Apache::lonxml::depthcounter=();
969: undef($Apache::lonxml::last_depth_count);
970: }
971:
972:
973: my @timers;
974: my $lasttime;
975: # @Apache::lonxml::depthcounter -> count of tags that exist so
976: # far at each level
977: # $Apache::lonxml::last_depth_count -> when ascending, need to
978: # remember the count for the level below the current level (for
979: # example going from 1_2 -> 1 -> 1_3 need to remember the 2 )
980:
981: sub increasedepth {
982: my ($token) = @_;
983: push(@Apache::lonxml::depthcounter,$Apache::lonxml::last_depth_count+1);
984: undef($Apache::lonxml::last_depth_count);
985: my $time;
986: if ($Apache::lonxml::debug eq "1") {
987: push(@timers,[&gettimeofday()]);
988: $time=&tv_interval($lasttime);
989: $lasttime=[&gettimeofday()];
990: }
991: my $spacing=' 'x($#Apache::lonxml::depthcounter);
992: $Apache::lonxml::curdepth=join('_',@Apache::lonxml::depthcounter);
993: # &Apache::lonxml::debug("s$spacing$Apache::lonxml::depth : $Apache::lonxml::olddepth : $Apache::lonxml::curdepth : $token->[1] : $time");
994: #print "<br />s $Apache::lonxml::depth : $Apache::lonxml::olddepth : $curdepth : $token->[1]\n";
995: }
996:
997: sub decreasedepth {
998: my ($token) = @_;
999: if ( $#Apache::lonxml::depthcounter == -1) {
1000: &Apache::lonxml::warning(&mt("Missing tags, unable to properly run file."));
1001: }
1002: $Apache::lonxml::last_depth_count = pop(@Apache::lonxml::depthcounter);
1003:
1004: my ($timer,$time);
1005: if ($Apache::lonxml::debug eq "1") {
1006: $timer=pop(@timers);
1007: $time=&tv_interval($lasttime);
1008: $lasttime=[&gettimeofday()];
1009: }
1010: my $spacing=' 'x($#Apache::lonxml::depthcounter);
1011: $Apache::lonxml::curdepth = join('_',@Apache::lonxml::depthcounter);
1012: # &Apache::lonxml::debug("e$spacing$Apache::lonxml::depth : $Apache::lonxml::olddepth : $Apache::lonxml::curdepth : $token->[1] : $time : ".&tv_interval($timer));
1013: #print "<br />e $Apache::lonxml::depth : $Apache::lonxml::olddepth : $token->[1] : $curdepth\n";
1014: }
1015:
1016: sub get_id {
1017: my ($parstack,$safeeval)=@_;
1018: my $id= &Apache::lonxml::get_param('id',$parstack,$safeeval);
1019: if ($env{'request.state'} eq 'construct' && $id =~ /([._]|[^\w\d\s[:punct:]])/) {
1020: &error(&mt("ID "[_1]" contains invalid characters, IDs are only allowed to contain letters, numbers, spaces and -",'<tt>'.$id.'</tt>'));
1021: }
1022: if ($id =~ /^\s*$/) { $id = $Apache::lonxml::curdepth; }
1023: return $id;
1024: }
1025:
1026: sub get_all_text_unbalanced {
1027: #there is a copy of this in lonpublisher.pm
1028: my($tag,$pars)= @_;
1029: my $token;
1030: my $result='';
1031: $tag='<'.$tag.'>';
1032: while ($token = $$pars[-1]->get_token) {
1033: if (($token->[0] eq 'T')||($token->[0] eq 'C')||($token->[0] eq 'D')) {
1034: if ($token->[0] eq 'T' && $token->[2]) {
1035: $result.='<![CDATA['.$token->[1].']]>';
1036: } else {
1037: $result.=$token->[1];
1038: }
1039: } elsif ($token->[0] eq 'PI') {
1040: $result.=$token->[2];
1041: } elsif ($token->[0] eq 'S') {
1042: $result.=$token->[4];
1043: } elsif ($token->[0] eq 'E') {
1044: $result.=$token->[2];
1045: }
1046: if ($result =~ /\Q$tag\E/is) {
1047: ($result,my $redo)=$result =~ /(.*)\Q$tag\E(.*)/is;
1048: #&Apache::lonxml::debug('Got a winner with leftovers ::'.$2);
1049: #&Apache::lonxml::debug('Result is :'.$1);
1050: $redo=$tag.$redo;
1051: &Apache::lonxml::newparser($pars,\$redo);
1052: last;
1053: }
1054: }
1055: return $result
1056:
1057: }
1058:
1059: #########################################################################
1060: # #
1061: # bubble line counter management #
1062: # #
1063: #########################################################################
1064:
1065: =pod
1066:
1067: For bubble grading mode and exam bubble printing mode, the tracking of
1068: the current 'bubble line number' is stored in the %env element
1069: 'form.counter', and is modifed and handled by the following routines.
1070:
1071: The value of it is stored in $Apache:lonxml::counter when live and
1072: stored back to env after done.
1073:
1074: =item &increment_counter($increment);
1075:
1076: Increments the internal counter environment variable a specified amount
1077:
1078: Optional Arguments:
1079: $increment - amount to increment by (defaults to 1)
1080: Also 1 if the value is negative or zero.
1081: $part_response - A concatenation of the part and response id
1082: identifying exactly what is being 'answered'.
1083:
1084:
1085: =cut
1086:
1087: sub increment_counter {
1088: my ($increment, $part_response) = @_;
1089: if ($env{'form.grade_noincrement'}) { return; }
1090: if (!defined($increment) || $increment le 0) {
1091: $increment = 1;
1092: }
1093: $Apache::lonxml::counter += $increment;
1094:
1095: # If the caller supplied the response_id parameter,
1096: # Maintain its counter.. creating if necessary.
1097:
1098: if (defined($part_response)) {
1099: if (!defined($Apache::lonxml::counters_per_part{$part_response})) {
1100: $Apache::lonxml::counters_per_part{$part_response} = 0;
1101: }
1102: $Apache::lonxml::counters_per_part{$part_response} += $increment;
1103: my $new_value = $Apache::lonxml::counters_per_part{$part_response};
1104: }
1105:
1106: $Apache::lonxml::counter_changed=1;
1107: }
1108:
1109: =pod
1110:
1111: =item &init_counter($increment);
1112:
1113: Initialize the internal counter environment variable
1114:
1115: =cut
1116:
1117: sub init_counter {
1118: if ($env{'request.state'} eq 'construct') {
1119: $Apache::lonxml::counter=1;
1120: $Apache::lonxml::counter_changed=1;
1121: } elsif (defined($env{'form.counter'})) {
1122: $Apache::lonxml::counter=$env{'form.counter'};
1123: $Apache::lonxml::counter_changed=0;
1124: } else {
1125: $Apache::lonxml::counter=1;
1126: $Apache::lonxml::counter_changed=1;
1127: }
1128: }
1129:
1130: sub store_counter {
1131: &Apache::lonnet::appenv({'form.counter' => $Apache::lonxml::counter});
1132: $Apache::lonxml::counter_changed=0;
1133: return '';
1134: }
1135:
1136: {
1137: my $state;
1138: sub clear_problem_counter {
1139: undef($state);
1140: &Apache::lonnet::delenv('form.counter');
1141: &Apache::lonxml::init_counter();
1142: &Apache::lonxml::store_counter();
1143: }
1144:
1145: sub remember_problem_counter {
1146: &Apache::lonnet::transfer_profile_to_env(undef,undef,1);
1147: $state = $env{'form.counter'};
1148: }
1149:
1150: sub restore_problem_counter {
1151: if (defined($state)) {
1152: &Apache::lonnet::appenv({'form.counter' => $state});
1153: }
1154: }
1155: sub get_problem_counter {
1156: if ($Apache::lonxml::counter_changed) { &store_counter() }
1157: &Apache::lonnet::transfer_profile_to_env(undef,undef,1);
1158: return $env{'form.counter'};
1159: }
1160: }
1161:
1162: =pod
1163:
1164: =item bubble_lines_for_part(part_response)
1165:
1166: Returns the number of lines required to get a response for
1167: $part_response (this is just $Apache::lonxml::counters_per_part{$part_response}
1168:
1169: =cut
1170:
1171: sub bubble_lines_for_part {
1172: my ($part_response) = @_;
1173:
1174: if (!defined($Apache::lonxml::counters_per_part{$part_response})) {
1175: return 0;
1176: } else {
1177: return $Apache::lonxml::counters_per_part{$part_response};
1178: }
1179: }
1180:
1181: =pod
1182:
1183: =item clear_bubble_lines_for_part
1184:
1185: Clears the hash of bubble lines per part. If a caller
1186: needs to analyze several resources this should be called between
1187: resources to reset the hash for each problem being analyzed.
1188:
1189: =cut
1190:
1191: sub clear_bubble_lines_for_part {
1192: undef(%Apache::lonxml::counters_per_part);
1193: }
1194:
1195: =pod
1196:
1197: =item set_bubble_lines(part_response, value)
1198:
1199: If there is a problem part, that for whatever reason
1200: requires bubble lines that are not
1201: the same as the counter increment, it can call this sub during
1202: analysis to set its hash value explicitly.
1203:
1204: =cut
1205:
1206: sub set_bubble_lines {
1207: my ($part_response, $value) = @_;
1208:
1209: $Apache::lonxml::counters_per_part{$part_response} = $value;
1210: }
1211:
1212: =pod
1213:
1214: =item get_bubble_line_hash
1215:
1216: Returns the current bubble line hash. This is assumed to
1217: be small so we return a copy
1218:
1219:
1220: =cut
1221:
1222: sub get_bubble_line_hash {
1223: return %Apache::lonxml::counters_per_part;
1224: }
1225:
1226:
1227: #--------------------------------------------------
1228:
1229: sub get_all_text {
1230: my($tag,$pars,$style)= @_;
1231: my $gotfullstack=1;
1232: if (ref($pars) ne 'ARRAY') {
1233: $gotfullstack=0;
1234: $pars=[$pars];
1235: }
1236: if (ref($style) ne 'HASH') {
1237: $style={};
1238: }
1239: my $depth=0;
1240: my $token;
1241: my $result='';
1242: if ( $tag =~ m:^/: ) {
1243: my $tag=substr($tag,1);
1244: #&Apache::lonxml::debug("have:$tag:");
1245: my $top_empty=0;
1246: while (($depth >=0) && ($#$pars > -1) && (!$top_empty)) {
1247: while (($depth >=0) && ($token = $$pars[-1]->get_token)) {
1248: #&Apache::lonxml::debug("e token:$token->[0]:$depth:$token->[1]:".$#$pars.":".$#Apache::lonxml::pwd);
1249: if (($token->[0] eq 'T')||($token->[0] eq 'C')||($token->[0] eq 'D')) {
1250: if ($token->[2]) {
1251: $result.='<![CDATA['.$token->[1].']]>';
1252: } else {
1253: $result.=$token->[1];
1254: }
1255: } elsif ($token->[0] eq 'PI') {
1256: $result.=$token->[2];
1257: } elsif ($token->[0] eq 'S') {
1258: if ($token->[1] =~ /^\Q$tag\E$/i) { $depth++; }
1259: if ($token->[1] =~ /^LONCAPA_INTERNAL_TURN_STYLE_ON$/) { $Apache::lonxml::usestyle=1; }
1260: if ($token->[1] =~ /^LONCAPA_INTERNAL_TURN_STYLE_OFF$/) { $Apache::lonxml::usestyle=0; }
1261: $result.=$token->[4];
1262: } elsif ($token->[0] eq 'E') {
1263: if ( $token->[1] =~ /^\Q$tag\E$/i) { $depth--; }
1264: #skip sending back the last end tag
1265: if ($depth == 0 && exists($$style{'/'.$token->[1]}) && $Apache::lonxml::usestyle) {
1266: my $string=
1267: '<LONCAPA_INTERNAL_TURN_STYLE_OFF end="yes" />'.
1268: $$style{'/'.$token->[1]}.
1269: $token->[2].
1270: '<LONCAPA_INTERNAL_TURN_STYLE_ON />';
1271: &Apache::lonxml::newparser($pars,\$string);
1272: #&Apache::lonxml::debug("reParsing $string");
1273: next;
1274: }
1275: if ($depth > -1) {
1276: $result.=$token->[2];
1277: } else {
1278: $$pars[-1]->unget_token($token);
1279: }
1280: }
1281: }
1282: if (($depth >=0) && ($#$pars == 0) ) { $top_empty=1; }
1283: if (($depth >=0) && ($#$pars > 0) ) {
1284: pop(@$pars);
1285: pop(@Apache::lonxml::pwd);
1286: }
1287: }
1288: if ($top_empty && $depth >= 0) {
1289: #never found the end tag ran out of text, throw error send back blank
1290: &error('Never found end tag for <'.$tag.
1291: '> current string <pre>'.
1292: &HTML::Entities::encode($result,'<>&"').
1293: '</pre>');
1294: if ($gotfullstack) {
1295: my $newstring='</'.$tag.'>'.$result;
1296: &Apache::lonxml::newparser($pars,\$newstring);
1297: }
1298: $result='';
1299: }
1300: } else {
1301: while ($#$pars > -1) {
1302: while ($token = $$pars[-1]->get_token) {
1303: #&Apache::lonxml::debug("s token:$token->[0]:$depth:$token->[1]");
1304: if (($token->[0] eq 'T')||($token->[0] eq 'C')||
1305: ($token->[0] eq 'D')) {
1306: if ($token->[2]) {
1307: $result.='<![CDATA['.$token->[1].']]>';
1308: } else {
1309: $result.=$token->[1];
1310: }
1311: } elsif ($token->[0] eq 'PI') {
1312: $result.=$token->[2];
1313: } elsif ($token->[0] eq 'S') {
1314: if ( $token->[1] =~ /^\Q$tag\E$/i) {
1315: $$pars[-1]->unget_token($token); last;
1316: } else {
1317: $result.=$token->[4];
1318: }
1319: if ($token->[1] =~ /^LONCAPA_INTERNAL_TURN_STYLE_ON$/) { $Apache::lonxml::usestyle=1; }
1320: if ($token->[1] =~ /^LONCAPA_INTERNAL_TURN_STYLE_OFF$/) { $Apache::lonxml::usestyle=0; }
1321: } elsif ($token->[0] eq 'E') {
1322: $result.=$token->[2];
1323: }
1324: }
1325: if (($#$pars > 0) ) {
1326: pop(@$pars);
1327: pop(@Apache::lonxml::pwd);
1328: } else { last; }
1329: }
1330: }
1331: #&Apache::lonxml::debug("Exit:$result:");
1332: return $result
1333: }
1334:
1335: sub newparser {
1336: my ($parser,$contentref,$dir) = @_;
1337: push (@$parser,HTML::LCParser->new($contentref));
1338: $$parser[-1]->xml_mode(1);
1339: $$parser[-1]->marked_sections(1);
1340: if ( $dir eq '' ) {
1341: push (@Apache::lonxml::pwd, $Apache::lonxml::pwd[$#Apache::lonxml::pwd]);
1342: } else {
1343: push (@Apache::lonxml::pwd, $dir);
1344: }
1345: }
1346:
1347: sub parstring {
1348: my ($token) = @_;
1349: my (@vars,@values);
1350: foreach my $attr (@{$token->[3]}) {
1351: if ($attr!~/\W/) {
1352: my $val=$token->[2]->{$attr};
1353: $val =~ s/([\%\@\\\"\'])/\\$1/g;
1354: $val =~ s/(\$[^\{a-zA-Z_])/\\$1/g;
1355: $val =~ s/(\$)$/\\$1/;
1356: #if ($val =~ m/^[\%\@]/) { $val="\\".$val; }
1357: push(@vars,"\$$attr");
1358: push(@values,"\"$val\"");
1359: }
1360: }
1361: my $var_init =
1362: (@vars) ? 'my ('.join(',',@vars).') = ('.join(',',@values).');'
1363: : '';
1364: return $var_init;
1365: }
1366:
1367: sub extlink {
1368: my ($res,$exact)=@_;
1369: if (!$exact) {
1370: $res=&Apache::lonnet::hreflocation($Apache::lonxml::pwd[-1],$res);
1371: }
1372: push(@Apache::lonxml::extlinks,$res)
1373: }
1374:
1375: sub writeallows {
1376: unless ($#extlinks>=0) { return; }
1377: my $thisurl = &Apache::lonnet::clutter(shift);
1378: if ($env{'httpref.'.$thisurl}) {
1379: $thisurl=$env{'httpref.'.$thisurl};
1380: }
1381: my $thisdir=$thisurl;
1382: $thisdir=~s/\/[^\/]+$//;
1383: my %httpref=();
1384: foreach (@extlinks) {
1385: $httpref{'httpref.'.
1386: &Apache::lonnet::hreflocation($thisdir,&unescape($_))}=$thisurl;
1387: }
1388: @extlinks=();
1389: &Apache::lonnet::appenv(\%httpref);
1390: }
1391:
1392: sub register_ssi {
1393: my ($url,%form)=@_;
1394: push (@Apache::lonxml::ssi_info,{'url'=>$url,'form'=>\%form});
1395: return '';
1396: }
1397:
1398: sub do_registered_ssi {
1399: foreach my $info (@Apache::lonxml::ssi_info) {
1400: my %form=%{ $info->{'form'}};
1401: my $url=$info->{'url'};
1402: &Apache::lonnet::ssi($url,%form);
1403: }
1404: }
1405:
1406: sub add_script_result {
1407: my ($display) = @_;
1408: push(@script_var_displays, $display);
1409: }
1410:
1411: #
1412: # Afterburner handles anchors, highlights and links
1413: #
1414: sub afterburn {
1415: my $result=shift;
1416: &Apache::loncommon::get_unprocessed_cgi($ENV{'QUERY_STRING'},
1417: ['highlight','anchor','link']);
1418: if ($env{'form.highlight'}) {
1419: foreach (split(/\,/,$env{'form.highlight'})) {
1420: my $anchorname=$_;
1421: my $matchthis=$anchorname;
1422: $matchthis=~s/\_+/\\s\+/g;
1423: $result=~s/(\Q$matchthis\E)/\<font color=\"red\"\>$1\<\/font\>/gs;
1424: }
1425: }
1426: if ($env{'form.link'}) {
1427: foreach (split(/\,/,$env{'form.link'})) {
1428: my ($anchorname,$linkurl)=split(/\>/,$_);
1429: my $matchthis=$anchorname;
1430: $matchthis=~s/\_+/\\s\+/g;
1431: $result=~s/(\Q$matchthis\E)/\<a href=\"$linkurl\"\>$1\<\/a\>/gs;
1432: }
1433: }
1434: if ($env{'form.anchor'}) {
1435: my $anchorname=$env{'form.anchor'};
1436: my $matchthis=$anchorname;
1437: $matchthis=~s/\_+/\\s\+/g;
1438: $result=~s/(\Q$matchthis\E)/\<a name=\"$anchorname\"\>$1\<\/a\>/s;
1439: $result.=(<<"ENDSCRIPT");
1440: <script type="text/javascript">
1441: document.location.hash='$anchorname';
1442: </script>
1443: ENDSCRIPT
1444: }
1445: return $result;
1446: }
1447:
1448: sub storefile {
1449: my ($file,$contents)=@_;
1450: &Apache::lonnet::correct_line_ends(\$contents);
1451: if (my $fh=Apache::File->new('>'.$file)) {
1452: print $fh $contents;
1453: $fh->close();
1454: return 1;
1455: } else {
1456: &warning(&mt('Unable to save file [_1]','<tt>'.$file.'</tt>'));
1457: return 0;
1458: }
1459: }
1460:
1461: sub createnewhtml {
1462: my $title=&mt('Title of document goes here');
1463: my $body=&mt('Body of document goes here');
1464: my $filecontents=(<<SIMPLECONTENT);
1465: <html>
1466: <head>
1467: <title>$title</title>
1468: </head>
1469: <body bgcolor="#FFFFFF">
1470: $body
1471: </body>
1472: </html>
1473: SIMPLECONTENT
1474: return $filecontents;
1475: }
1476:
1477: sub createnewsty {
1478: my $filecontents=(<<SIMPLECONTENT);
1479: <definetag name="">
1480: <render>
1481: <web></web>
1482: <tex></tex>
1483: </render>
1484: </definetag>
1485: SIMPLECONTENT
1486: return $filecontents;
1487: }
1488:
1489: sub verify_html {
1490: my ($filecontents)=@_;
1491: if ($filecontents!~/(?:\<|\<\;)(?:html|xml)[^\<]*(?:\>|\>\;)/is) {
1492: return &mt('File does not have [_1] or [_2] starting tag','<html>','<xml>');
1493: }
1494: if ($filecontents!~/(?:\<|\<\;)\/(?:html|xml)(?:\>|\>\;)/is) {
1495: return &mt('File does not have [_1] or [_2] ending tag','<html>','<xml>');
1496: }
1497: if ($filecontents!~/(?:\<|\<\;)(?:body|frameset)[^\<]*(?:\>|\>\;)/is) {
1498: return &mt('File does not have [_1] or [_2] starting tag','<body>','<frameset>');
1499: }
1500: if ($filecontents!~/(?:\<|\<\;)\/(?:body|frameset)[^\<]*(?:\>|\>\;)/is) {
1501: return &mt('File does not have [_1] or [_2] ending tag','<body>','<frameset>');
1502: }
1503: return '';
1504: }
1505:
1506: sub renderingoptions {
1507: my %langchoices=('' => '');
1508: foreach (&Apache::loncommon::languageids()) {
1509: if (&Apache::loncommon::supportedlanguagecode($_)) {
1510: $langchoices{&Apache::loncommon::supportedlanguagecode($_)}
1511: = &Apache::loncommon::plainlanguagedescription($_);
1512: }
1513: }
1514: return
1515: '<span class="LC_nobreak">'.
1516: &mt('Language:').' '.
1517: &Apache::loncommon::select_form($env{'form.languages'},'languages',
1518: %langchoices).'
1519: </span>
1520: <span class="LC_nobreak">'.
1521: &mt('Math Rendering:').' '.
1522: &Apache::loncommon::select_form($env{'form.texengine'},'texengine',
1523: ('' => '',
1524: 'tth' => 'tth (TeX to HTML)',
1525: 'jsMath' => 'jsMath',
1526: 'mimetex' => 'mimetex (Convert to Images)')).'
1527: </span>';
1528: }
1529:
1530: sub inserteditinfo {
1531: my ($filecontents, $filetype, $filename)=@_;
1532: $filecontents = &HTML::Entities::encode($filecontents,'<>&"');
1533: my $xml_help = '';
1534: my $initialize='';
1535: my $textarea_id = 'filecont';
1536: my ($add_to_onload, $add_to_onresize);
1537: $initialize=&Apache::lonhtmlcommon::spellheader();
1538: if ($filetype eq 'html'
1539: && (!&Apache::lonhtmlcommon::htmlareablocked() &&
1540: &Apache::lonhtmlcommon::htmlareabrowser())) {
1541: $textarea_id .= '___Frame';
1542: my $lang = &Apache::lonhtmlcommon::htmlarea_lang();
1543: $initialize.=(<<FULLPAGE);
1544: <script type="text/javascript">
1545: lonca
1546: function initDocument() {
1547: var oFCKeditor = new FCKeditor('filecont');
1548: oFCKeditor.Config['CustomConfigurationsPath'] = '/fckeditor/loncapaconfig.js' ;
1549: oFCKeditor.Config['FullPage'] = true
1550: oFCKeditor.Config['AutoDetectLanguage'] = false;
1551: oFCKeditor.Config['DefaultLanguage'] = "$lang";
1552: oFCKeditor.ReplaceTextarea();
1553: }
1554: function check_if_dirty(editor) {
1555: if (editor.IsDirty()) {
1556: unClean();
1557: }
1558: }
1559: function FCKeditor_OnComplete(editor) {
1560: editor.Events.AttachEvent("OnSelectionChange",check_if_dirty);
1561: resize_textarea('$textarea_id','LC_aftertextarea');
1562: }
1563: </script>
1564: FULLPAGE
1565: } else {
1566: $initialize.=(<<FULLPAGE);
1567: <script type="text/javascript">
1568: function initDocument() {
1569: resize_textarea('$textarea_id','LC_aftertextarea');
1570: }
1571: </script>
1572: FULLPAGE
1573: }
1574:
1575: $add_to_onload = 'initDocument();';
1576: $add_to_onresize = "resize_textarea('$textarea_id','LC_aftertextarea');";
1577:
1578: if ($filetype eq 'html') {
1579: $xml_help=&Apache::loncommon::helpLatexCheatsheet();
1580: }
1581:
1582: my $titledisplay=&display_title();
1583: my %lt=&Apache::lonlocal::texthash('st' => 'Save and Edit',
1584: 'vi' => 'Save and View',
1585: 'dv' => 'Discard Edits and View',
1586: 'un' => 'undo',
1587: 'ed' => 'Edit');
1588: my $spelllink .=&Apache::lonhtmlcommon::spelllink('xmledit','filecont');
1589: my $textarea_events = &Apache::edit::element_change_detection();
1590: my $form_events = &Apache::edit::form_change_detection();
1591: my $htmlerror=&verify_html($filecontents);
1592: if ($htmlerror) {
1593: $htmlerror='<span class="LC_error">'.$htmlerror.'</span>';
1594: }
1595: my $editfooter=(<<ENDFOOTER);
1596: $initialize
1597: <a name="editsection" />
1598: <form $form_events method="post" name="xmledit">
1599: <div class="LC_edit_problem_editxml_header">
1600: <table class="LC_edit_problem_header_title"><tr><td>
1601: $filename
1602: </td><td align="right">
1603: $xml_help
1604: </td></tr>
1605: </table>
1606: <div class="LC_edit_problem_discards">
1607: <input type="submit" name="discardview" accesskey="d" value="$lt{'dv'}" />
1608: <input type="submit" name="Undo" accesskey="u" value="$lt{'un'}" />
1609: $spelllink $htmlerror
1610: </div>
1611: <div class="LC_edit_problem_saves">
1612: <input type="submit" name="savethisfile" accesskey="s" value="$lt{'st'}" />
1613: <input type="submit" name="viewmode" accesskey="v" value="$lt{'vi'}" />
1614: </div>
1615: </div>
1616: <textarea $textarea_events style="width:100%" cols="80" rows="44" name="filecont" id="filecont">$filecontents</textarea>
1617: <div id="LC_aftertextarea">
1618: <br />
1619: $titledisplay
1620: </div>
1621: </form>
1622: </body>
1623: ENDFOOTER
1624: return ($editfooter,$add_to_onload,$add_to_onresize);;
1625: }
1626:
1627: sub get_target {
1628: my $viewgrades=&Apache::lonnet::allowed('vgr',$env{'request.course.id'});
1629: if ( $env{'request.state'} eq 'published') {
1630: if ( defined($env{'form.grade_target'})
1631: && ($viewgrades == 'F' )) {
1632: return ($env{'form.grade_target'});
1633: } elsif (defined($env{'form.grade_target'})) {
1634: if (($env{'form.grade_target'} eq 'web') ||
1635: ($env{'form.grade_target'} eq 'tex') ) {
1636: return $env{'form.grade_target'}
1637: } else {
1638: return 'web';
1639: }
1640: } else {
1641: return 'web';
1642: }
1643: } elsif ($env{'request.state'} eq 'construct') {
1644: if ( defined($env{'form.grade_target'})) {
1645: return ($env{'form.grade_target'});
1646: } else {
1647: return 'web';
1648: }
1649: } else {
1650: return 'web';
1651: }
1652: }
1653:
1654: sub handler {
1655: my $request=shift;
1656:
1657: my $target=&get_target();
1658:
1659: $Apache::lonxml::debug=$env{'user.debug'};
1660:
1661: &Apache::loncommon::content_type($request,'text/html');
1662: &Apache::loncommon::no_cache($request);
1663: if ($env{'request.state'} eq 'published') {
1664: $request->set_last_modified(&Apache::lonnet::metadata($request->uri,
1665: 'lastrevisiondate'));
1666: }
1667: $request->send_http_header;
1668:
1669: return OK if $request->header_only;
1670:
1671:
1672: my $file=&Apache::lonnet::filelocation("",$request->uri);
1673: my $filetype;
1674: if ($file =~ /\.sty$/) {
1675: $filetype='sty';
1676: } else {
1677: $filetype='html';
1678: }
1679: #
1680: # Edit action? Save file.
1681: #
1682: if (!($env{'request.state'} eq 'published')) {
1683: if ($env{'form.savethisfile'} || $env{'form.viewmode'} || $env{'form.Undo'}) {
1684: my $html_file=&Apache::lonnet::getfile($file);
1685: my $error = &Apache::lonhomework::handle_save_or_undo($request, \$html_file, \$env{'form.filecont'});
1686: if ($env{'form.savethisfile'}) {
1687: $env{'form.editmode'}='Edit'; #force edit mode
1688: }
1689: }
1690: }
1691: my %mystyle;
1692: my $result = '';
1693: my $filecontents=&Apache::lonnet::getfile($file);
1694: if ($filecontents eq -1) {
1695: my $start_page=&Apache::loncommon::start_page('File Error');
1696: my $end_page=&Apache::loncommon::end_page();
1697: my $fnf=&mt('File not found');
1698: $result=(<<ENDNOTFOUND);
1699: $start_page
1700: <b>$fnf: $file</b>
1701: $end_page
1702: ENDNOTFOUND
1703: $filecontents='';
1704: if ($env{'request.state'} ne 'published') {
1705: if ($filetype eq 'sty') {
1706: $filecontents=&createnewsty();
1707: } else {
1708: $filecontents=&createnewhtml();
1709: }
1710: $env{'form.editmode'}='Edit'; #force edit mode
1711: }
1712: } else {
1713: unless ($env{'request.state'} eq 'published') {
1714: if ($filecontents=~/BEGIN LON-CAPA Internal/) {
1715: &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.'));
1716: }
1717: #
1718: # we are in construction space, see if edit mode forced
1719: &Apache::loncommon::get_unprocessed_cgi($ENV{'QUERY_STRING'},
1720: ['editmode']);
1721: }
1722: if (!$env{'form.editmode'} || $env{'form.viewmode'} || $env{'form.discardview'}) {
1723: &Apache::structuretags::reset_problem_globals();
1724: $result = &Apache::lonxml::xmlparse($request,$target,$filecontents,
1725: '',%mystyle);
1726: # .html files may contain <problem> or <Task> need to clean
1727: # up if it did
1728: &Apache::structuretags::reset_problem_globals();
1729: &Apache::lonhomework::finished_parsing();
1730: &Apache::loncommon::get_unprocessed_cgi($ENV{'QUERY_STRING'},
1731: ['rawmode']);
1732: if ($env{'form.rawmode'}) { $result = $filecontents; }
1733: if ($filetype eq 'sty') {
1734: my $controls =
1735: ($env{'request.state'} eq 'construct') ? &Apache::londefdef::edit_controls()
1736: : '';
1737: my %options = ('bgcolor' => '#FFFFFF');
1738: $result =
1739: &Apache::loncommon::start_page(undef,undef,\%options).
1740: $controls.
1741: $result.
1742: &Apache::loncommon::end_page();
1743: }
1744: }
1745: }
1746:
1747: #
1748: # Edit action? Insert editing commands
1749: #
1750: unless ($env{'request.state'} eq 'published') {
1751: if ($env{'form.editmode'} && (!($env{'form.viewmode'})) && (!($env{'form.discardview'})))
1752: {
1753: my $displayfile=$request->uri;
1754: $displayfile=~s/^\/[^\/]*//;
1755:
1756: my ($edit_info, $add_to_onload, $add_to_onresize)=
1757: &inserteditinfo($filecontents,$filetype,$displayfile);
1758:
1759: my %options =
1760: ('add_entries' =>
1761: {'onresize' => $add_to_onresize,
1762: 'onload' => $add_to_onload, });
1763:
1764: if ($env{'environment.remote'} ne 'off') {
1765: $options{'bgcolor'} = '#FFFFFF';
1766: $options{'only_body'} = 1;
1767: }
1768: my $js =
1769: &Apache::edit::js_change_detection().
1770: &Apache::loncommon::resize_textarea_js();
1771: my $start_page = &Apache::loncommon::start_page(undef,$js,
1772: \%options);
1773: $result=$start_page.
1774: &Apache::lonxml::message_location().
1775: $edit_info.
1776: &Apache::loncommon::end_page();
1777: }
1778: }
1779: if ($filetype eq 'html') { &writeallows($request->uri); }
1780:
1781: &Apache::lonxml::add_messages(\$result);
1782: $request->print($result);
1783:
1784: return OK;
1785: }
1786:
1787: sub display_title {
1788: my $result;
1789: if ($env{'request.state'} eq 'construct') {
1790: my $title=&Apache::lonnet::gettitle();
1791: if (!defined($title) || $title eq '') {
1792: $title = $env{'request.filename'};
1793: $title = substr($title, rindex($title, '/') + 1);
1794: }
1795: $result = "<script type='text/javascript'>top.document.title = '$title - LON-CAPA "
1796: .&mt('Construction Space')."';</script>";
1797: }
1798: return $result;
1799: }
1800:
1801: sub debug {
1802: if ($Apache::lonxml::debug eq "1") {
1803: $|=1;
1804: my $request=$Apache::lonxml::request;
1805: if (!$request) {
1806: eval { $request=Apache->request; };
1807: }
1808: if (!$request) {
1809: eval { $request=Apache2::RequestUtil->request; };
1810: }
1811: $request->print('<font size="-2"><pre>DEBUG:'.&HTML::Entities::encode($_[0],'<>&"')."</pre></font>\n");
1812: #&Apache::lonnet::logthis($_[0]);
1813: }
1814: }
1815:
1816: sub show_error_warn_msg {
1817: if ($env{'request.filename'} eq '/home/httpd/html/res/lib/templates/simpleproblem.problem' &&
1818: &Apache::lonnet::allowed('mdc',$env{'request.course.id'})) {
1819: return 1;
1820: }
1821: return (($Apache::lonxml::debug eq 1) ||
1822: ($env{'request.state'} eq 'construct') ||
1823: ($Apache::lonhomework::browse eq 'F'
1824: &&
1825: $env{'form.show_errors'} eq 'on'));
1826: }
1827:
1828: sub error {
1829: my @errors = @_;
1830:
1831: $errorcount++;
1832:
1833: if (defined($Apache::inputtags::part)) {
1834: if ( @Apache::inputtags::response ) {
1835: push(@errors,
1836: &mt("This error occurred while processing response [_1] in part [_2]",
1837: $Apache::inputtags::response[-1],
1838: $Apache::inputtags::part));
1839: } else {
1840: push(@errors,
1841: &mt("This error occurred while processing part [_1]",
1842: $Apache::inputtags::part));
1843: }
1844: }
1845:
1846: if ( &show_error_warn_msg() ) {
1847: # If printing in construction space, put the error inside <pre></pre>
1848: push(@Apache::lonxml::error_messages,
1849: $Apache::lonxml::warnings_error_header
1850: .'<div class="LC_error">'
1851: .'<b>'.&mt('ERROR:').' </b>'.join("<br />\n",@errors)
1852: ."</div>\n");
1853: $Apache::lonxml::warnings_error_header='';
1854: } else {
1855: my $errormsg;
1856: my ($symb)=&Apache::lonnet::symbread();
1857: if ( !$symb ) {
1858: #public or browsers
1859: $errormsg=&mt("An error occurred while processing this resource. The author has been notified.");
1860: }
1861: my $host=$Apache::lonnet::perlvar{'lonHostID'};
1862: push(@errors,
1863: &mt("The error occurred on host [_1]",
1864: "<tt>$host</tt>"));
1865:
1866: my $msg = join('<br />', @errors);
1867:
1868: #notify author
1869: &Apache::lonmsg::author_res_msg($env{'request.filename'},$msg);
1870: #notify course
1871: if ( $symb && $env{'request.course.id'} ) {
1872: my $cnum=$env{'course.'.$env{'request.course.id'}.'.num'};
1873: my $cdom=$env{'course.'.$env{'request.course.id'}.'.domain'};
1874: my (undef,%users)=&Apache::lonmsg::decide_receiver(undef,0,1,1,1);
1875: my $declutter=&Apache::lonnet::declutter($env{'request.filename'});
1876: my $baseurl = &Apache::lonnet::clutter($declutter);
1877: my @userlist;
1878: foreach (keys %users) {
1879: my ($user,$domain) = split(/:/, $_);
1880: push(@userlist,"$user\@$domain");
1881: my $key=$declutter.'_'.$user.'_'.$domain;
1882: my %lastnotified=&Apache::lonnet::get('nohist_xmlerrornotifications',
1883: [$key],
1884: $cdom,$cnum);
1885: my $now=time;
1886: if ($now-$lastnotified{$key}>86400) {
1887: my $title = &Apache::lonnet::gettitle($symb);
1888: my $sentmessage;
1889: &Apache::lonmsg::user_normal_msg($user,$domain,
1890: "Error [$title]",$msg,'',$baseurl,'','',
1891: \$sentmessage,$symb,$title,1);
1892: &Apache::lonnet::put('nohist_xmlerrornotifications',
1893: {$key => $now},
1894: $cdom,$cnum);
1895: }
1896: }
1897: if ($env{'request.role.adv'}) {
1898: $errormsg=&mt("An error occurred while processing this resource. The course personnel ([_1]) and the author have been notified.",join(', ',@userlist));
1899: } else {
1900: $errormsg=&mt("An error occurred while processing this resource. The instructor has been notified.");
1901: }
1902: }
1903: push(@Apache::lonxml::error_messages,"<b>$errormsg</b> <br />");
1904: }
1905: }
1906:
1907: sub warning {
1908: $warningcount++;
1909:
1910: if ($env{'form.grade_target'} ne 'tex') {
1911: if ( &show_error_warn_msg() ) {
1912: push(@Apache::lonxml::warning_messages,
1913: $Apache::lonxml::warnings_error_header
1914: .'<div class="LC_warning">'
1915: .&mt('[_1]W[_2]ARNING','<b>','</b>')."<b>:</b> ".join('<br />',@_)
1916: ."</div>\n"
1917: );
1918: $Apache::lonxml::warnings_error_header='';
1919: }
1920: }
1921: }
1922:
1923: sub info {
1924: if ($env{'form.grade_target'} ne 'tex'
1925: && $env{'request.state'} eq 'construct') {
1926: push(@Apache::lonxml::info_messages,join('<br />',@_)."<br />\n");
1927: }
1928: }
1929:
1930: sub message_location {
1931: return '__LONCAPA_INTERNAL_MESSAGE_LOCATION__';
1932: }
1933:
1934: sub add_messages {
1935: my ($msg)=@_;
1936: my $result=join(' ',
1937: @Apache::lonxml::info_messages,
1938: @Apache::lonxml::error_messages,
1939: @Apache::lonxml::warning_messages);
1940: undef(@Apache::lonxml::info_messages);
1941: undef(@Apache::lonxml::error_messages);
1942: undef(@Apache::lonxml::warning_messages);
1943: $$msg=~s/__LONCAPA_INTERNAL_MESSAGE_LOCATION__/$result/;
1944: $$msg=~s/__LONCAPA_INTERNAL_MESSAGE_LOCATION__//g;
1945: }
1946:
1947: sub get_param {
1948: my ($param,$parstack,$safeeval,$context,$case_insensitive) = @_;
1949: if ( ! $context ) { $context = -1; }
1950: my $args ='';
1951: if ( $#$parstack > (-2-$context) ) { $args=$$parstack[$context]; }
1952: if ( ! $Apache::lonxml::usestyle ) {
1953: $args=$Apache::lonxml::style_values.$args;
1954: }
1955: if ( ! $args ) { return undef; }
1956: if ( $case_insensitive ) {
1957: if ($args =~ s/(my (?:.*))(\$\Q$param\E[,\)])/$1.lc($2)/ei) {
1958: return &Apache::run::run("{$args;".'return $'.$param.'}',
1959: $safeeval); #'
1960: } else {
1961: return undef;
1962: }
1963: } else {
1964: if ( $args =~ /my .*\$\Q$param\E[,\)]/ ) {
1965: return &Apache::run::run("{$args;".'return $'.$param.'}',
1966: $safeeval); #'
1967: } else {
1968: return undef;
1969: }
1970: }
1971: }
1972:
1973: sub get_param_var {
1974: my ($param,$parstack,$safeeval,$context,$case_insensitive) = @_;
1975: if ( ! $context ) { $context = -1; }
1976: my $args ='';
1977: if ( $#$parstack > (-2-$context) ) { $args=$$parstack[$context]; }
1978: if ( ! $Apache::lonxml::usestyle ) {
1979: $args=$Apache::lonxml::style_values.$args;
1980: }
1981: &Apache::lonxml::debug("Args are $args param is $param");
1982: if ($case_insensitive) {
1983: if (! ($args=~s/(my (?:.*))(\$\Q$param\E[,\)])/$1.lc($2)/ei)) {
1984: return undef;
1985: }
1986: } elsif ( $args !~ /my .*\$\Q$param\E[,\)]/ ) { return undef; }
1987: my $value=&Apache::run::run("{$args;".'return $'.$param.'}',$safeeval); #'
1988: &Apache::lonxml::debug("first run is $value");
1989: if ($value =~ /^[\$\@\%][a-zA-Z_]\w*$/) {
1990: &Apache::lonxml::debug("doing second");
1991: my @result=&Apache::run::run("return $value",$safeeval,1);
1992: if (!defined($result[0])) {
1993: return $value
1994: } else {
1995: if (wantarray) { return @result; } else { return $result[0]; }
1996: }
1997: } else {
1998: return $value;
1999: }
2000: }
2001:
2002: sub register_insert_xml {
2003: my $parser = HTML::LCParser->new($Apache::lonnet::perlvar{'lonTabDir'}
2004: .'/insertlist.xml');
2005: my ($tagnum,$in_help)=(0,0);
2006: my @alltags;
2007: my $tag;
2008: while (my $token = $parser->get_token()) {
2009: if ($token->[0] eq 'S') {
2010: my $key;
2011: if ($token->[1] eq 'tag') {
2012: $tag = $token->[2]{'name'};
2013: $insertlist{"$tagnum.tag"} = $tag;
2014: $insertlist{"$tag.num"} = $tagnum;
2015: push(@alltags,$tag);
2016: } elsif ($in_help && $token->[1] eq 'file') {
2017: $key = $tag.'.helpfile';
2018: } elsif ($in_help && $token->[1] eq 'description') {
2019: $key = $tag.'.helpdesc';
2020: } elsif ($token->[1] eq 'description' ||
2021: $token->[1] eq 'color' ||
2022: $token->[1] eq 'show' ) {
2023: $key = $tag.'.'.$token->[1];
2024: } elsif ($token->[1] eq 'insert_sub') {
2025: $key = $tag.'.function';
2026: } elsif ($token->[1] eq 'help') {
2027: $in_help=1;
2028: } elsif ($token->[1] eq 'allow') {
2029: $key = $tag.'.allow';
2030: }
2031: if (defined($key)) {
2032: $insertlist{$key} = $parser->get_text();
2033: $insertlist{$key} =~ s/(^\s*|\s*$ )//gx;
2034: }
2035: } elsif ($token->[0] eq 'E') {
2036: if ($token->[1] eq 'tag') {
2037: undef($tag);
2038: $tagnum++;
2039: } elsif ($token->[1] eq 'help') {
2040: undef($in_help);
2041: }
2042: }
2043: }
2044:
2045: # parse the allows and ignore tags set to <show>no</show>
2046: foreach my $tag (@alltags) {
2047: next if (!exists($insertlist{"$tag.allow"}));
2048: my $allow = $insertlist{"$tag.allow"};
2049: foreach my $element (split(',',$allow)) {
2050: $element =~ s/(^\s*|\s*$ )//gx;
2051: if (!exists($insertlist{"$element.show"})
2052: || $insertlist{"$element.show"} ne 'no') {
2053: push(@{ $insertlist{$tag.'.which'} },$element);
2054: }
2055: }
2056: }
2057: }
2058:
2059: sub register_insert {
2060: return ®ister_insert_xml(@_);
2061: # &dump_insertlist('2');
2062: }
2063:
2064: sub dump_insertlist {
2065: my ($ext) = @_;
2066: open(XML,">/tmp/insertlist.xml.$ext");
2067: print XML ("<insertlist>");
2068: my $i=0;
2069:
2070: while (exists($insertlist{"$i.tag"})) {
2071: my $tag = $insertlist{"$i.tag"};
2072: print XML ("
2073: \t<tag name=\"$tag\">");
2074: if (defined($insertlist{"$tag.description"})) {
2075: print XML ("
2076: \t\t<description>".$insertlist{"$tag.description"}."</description>");
2077: }
2078: if (defined($insertlist{"$tag.color"})) {
2079: print XML ("
2080: \t\t<color>".$insertlist{"$tag.color"}."</color>");
2081: }
2082: if (defined($insertlist{"$tag.function"})) {
2083: print XML ("
2084: \t\t<insert_sub>".$insertlist{"$tag.function"}."</insert_sub>");
2085: }
2086: if (defined($insertlist{"$tag.show"})
2087: && $insertlist{"$tag.show"} ne 'yes') {
2088: print XML ("
2089: \t\t<show>".$insertlist{"$tag.show"}."</show>");
2090: }
2091: if (defined($insertlist{"$tag.helpfile"})) {
2092: print XML ("
2093: \t\t<help>
2094: \t\t\t<file>".$insertlist{"$tag.helpfile"}."</file>");
2095: if ($insertlist{"$tag.helpdesc"} ne '') {
2096: print XML ("
2097: \t\t\t<description>".$insertlist{"$tag.helpdesc"}."</description>");
2098: }
2099: print XML ("
2100: \t\t</help>");
2101: }
2102: if (defined($insertlist{"$tag.which"})) {
2103: print XML ("
2104: \t\t<allow>".join(',',sort(@{ $insertlist{"$tag.which"} }))."</allow>");
2105: }
2106: print XML ("
2107: \t</tag>");
2108: $i++;
2109: }
2110: print XML ("\n</insertlist>\n");
2111: close(XML);
2112: }
2113:
2114: sub description {
2115: my ($token)=@_;
2116: my $tag = &get_tag($token);
2117: return $insertlist{$tag.'.description'};
2118: }
2119:
2120: # Returns a list containing the help file, and the description
2121: sub helpinfo {
2122: my ($token)=@_;
2123: my $tag = &get_tag($token);
2124: return ($insertlist{$tag.'.helpfile'}, $insertlist{$tag.'.helpdesc'});
2125: }
2126:
2127: sub get_tag {
2128: my ($token)=@_;
2129: my $tagnum;
2130: my $tag=$token->[1];
2131: foreach my $namespace (reverse(@Apache::lonxml::namespace)) {
2132: my $testtag = $namespace.'::'.$tag;
2133: $tagnum = $insertlist{"$testtag.num"};
2134: last if (defined($tagnum));
2135: }
2136: if (!defined($tagnum)) {
2137: $tagnum = $Apache::lonxml::insertlist{"$tag.num"};
2138: }
2139: return $insertlist{"$tagnum.tag"};
2140: }
2141:
2142: 1;
2143: __END__
2144:
2145:
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