1: # The LearningOnline Network with CAPA
2: # XML Parser Module
3: #
4: # $Id: lonxml.pm,v 1.484.4.1 2008/12/11 22:19:45 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],'</'.$$stack[-1].'>'));
493: &end_tag($stack,$parstack,$token);
494: }
495: }
496: $result = &callsub("end_$token->[1]", $target, $token, $stack,
497: $parstack, $pars,$safeeval, $style_for_target);
498: }
499: } else {
500: &Apache::lonxml::error("Unknown token event :$token->[0]:$token->[1]:");
501: }
502: #evaluate variable refs in result
503: if ($Apache::lonxml::post_evaluate &&$result ne "") {
504: my $extras;
505: if (!$Apache::lonxml::usestyle) {
506: $extras=$Apache::lonxml::style_values;
507: }
508: if ( $#$parstack > -1 ) {
509: $result=&Apache::run::evaluate($result,$safeeval,$extras.$$parstack[-1]);
510: } else {
511: $result= &Apache::run::evaluate($result,$safeeval,$extras);
512: }
513: }
514: $Apache::lonxml::post_evaluate=1;
515:
516: if (($token->[0] eq 'T') || ($token->[0] eq 'C') || ($token->[0] eq 'D') ) {
517: #Style file definitions should be correct
518: if ($target eq 'tex' && ($Apache::lonxml::usestyle)) {
519: $result=&latex_special_symbols($result);
520: }
521: }
522:
523: if ($Apache::lonxml::redirection) {
524: $Apache::lonxml::outputstack['-1'] .= $result;
525: } else {
526: $finaloutput.=$result;
527: }
528: $result = '';
529:
530: if ($token->[0] eq 'E' && !$dontpop) {
531: &end_tag($stack,$parstack,$token);
532: }
533: $dontpop=0;
534: }
535: if ($#$pars > -1) {
536: pop @$pars;
537: pop @Apache::lonxml::pwd;
538: }
539: }
540:
541: # if ($target eq 'meta') {
542: # $finaloutput.=&endredirection;
543: # }
544:
545: if ( $start && $target eq 'grade') { &endredirection(); }
546: if ( $Apache::lonxml::redirection > $startredirection) {
547: while ($Apache::lonxml::redirection > $startredirection) {
548: $finaloutput .= &endredirection();
549: }
550: }
551: if (($ENV{'QUERY_STRING'}) && ($target eq 'web')) {
552: $finaloutput=&afterburn($finaloutput);
553: }
554: return $finaloutput;
555: }
556:
557: ##
558: ## Looks to see if there is a subroutine defined for this tag. If so, call it,
559: ## otherwise do not call it as we do not know what it is.
560: ##
561: sub callsub {
562: my ($sub,$target,$token,$tagstack,$parstack,$parser,$safeeval,$style)=@_;
563: my $currentstring='';
564: my $nodefault;
565: {
566: my $sub1;
567: no strict 'refs';
568: my $tag=$token->[1];
569: # get utterly rid of extended html tags
570: if ($tag=~/^x\-/i) { return ''; }
571: my $space=$Apache::lonxml::alltags{$tag}[-1];
572: if (!$space) {
573: $tag=~tr/A-Z/a-z/;
574: $sub=~tr/A-Z/a-z/;
575: $space=$Apache::lonxml::alltags{$tag}[-1]
576: }
577:
578: my $deleted=0;
579: if (($token->[0] eq 'S') && ($target eq 'modified')) {
580: $deleted=&Apache::edit::handle_delete($space,$target,$token,$tagstack,
581: $parstack,$parser,$safeeval,
582: $style);
583: }
584: if (!$deleted) {
585: if ($space) {
586: #&Apache::lonxml::debug("Calling sub $sub in $space $metamode");
587: $sub1="$space\:\:$sub";
588: ($currentstring,$nodefault) = &$sub1($target,$token,$tagstack,
589: $parstack,$parser,$safeeval,
590: $style);
591: } else {
592: if ($target eq 'tex') {
593: # throw away tag name
594: return '';
595: }
596: #&Apache::lonxml::debug("NOT Calling sub $sub in $space $metamode");
597: if ($metamode <1) {
598: if (defined($token->[4]) && ($metamode < 1)) {
599: $currentstring = $token->[4];
600: } else {
601: $currentstring = $token->[2];
602: }
603: }
604: }
605: # &Apache::lonxml::debug("nodefalt:$nodefault:");
606: if ($currentstring eq '' && $nodefault eq '') {
607: if ($target eq 'edit') {
608: #&Apache::lonxml::debug("doing default edit for $token->[1]");
609: if ($token->[0] eq 'S') {
610: $currentstring = &Apache::edit::tag_start($target,$token);
611: } elsif ($token->[0] eq 'E') {
612: $currentstring = &Apache::edit::tag_end($target,$token);
613: }
614: }
615: }
616: if ($target eq 'modified' && $nodefault eq '') {
617: if ($currentstring eq '') {
618: if ($token->[0] eq 'S') {
619: $currentstring = $token->[4];
620: } elsif ($token->[0] eq 'E') {
621: $currentstring = $token->[2];
622: } else {
623: $currentstring = $token->[2];
624: }
625: }
626: if ($token->[0] eq 'S') {
627: $currentstring.=&Apache::edit::handle_insert();
628: } elsif ($token->[0] eq 'E') {
629: $currentstring.=&Apache::edit::handle_insertafter($token->[1]);
630: }
631: }
632: }
633: use strict 'refs';
634: }
635: return $currentstring;
636: }
637:
638: {
639: my %state;
640:
641: sub init_state {
642: undef(%state);
643: }
644:
645: sub set_state {
646: my ($key,$value) = @_;
647: $state{$key} = $value;
648: return $value;
649: }
650: sub get_state {
651: my ($key) = @_;
652: return $state{$key};
653: }
654: }
655:
656: sub setup_globals {
657: my ($request,$target)=@_;
658: $Apache::lonxml::request=$request;
659: $errorcount=0;
660: $warningcount=0;
661: $Apache::lonxml::internal_error=0;
662: $Apache::lonxml::default_homework_loaded=0;
663: $Apache::lonxml::usestyle=1;
664: &init_counter();
665: &clear_bubble_lines_for_part();
666: &init_state();
667: &set_state('target',$target);
668: @Apache::lonxml::pwd=();
669: @Apache::lonxml::extlinks=();
670: @script_var_displays=();
671: @Apache::lonxml::ssi_info=();
672: $Apache::lonxml::post_evaluate=1;
673: $Apache::lonxml::warnings_error_header='';
674: $Apache::lonxml::substitute_LaTeX_symbols = 1;
675: if ($target eq 'meta') {
676: $Apache::lonxml::redirection = 0;
677: $Apache::lonxml::metamode = 1;
678: $Apache::lonxml::evaluate = 1;
679: $Apache::lonxml::import = 0;
680: } elsif ($target eq 'answer') {
681: $Apache::lonxml::redirection = 0;
682: $Apache::lonxml::metamode = 1;
683: $Apache::lonxml::evaluate = 1;
684: $Apache::lonxml::import = 1;
685: } elsif ($target eq 'grade') {
686: &startredirection(); #ended in inner_xmlparse on exit
687: $Apache::lonxml::metamode = 0;
688: $Apache::lonxml::evaluate = 1;
689: $Apache::lonxml::import = 1;
690: } elsif ($target eq 'modified') {
691: $Apache::lonxml::redirection = 0;
692: $Apache::lonxml::metamode = 0;
693: $Apache::lonxml::evaluate = 0;
694: $Apache::lonxml::import = 0;
695: } elsif ($target eq 'edit') {
696: $Apache::lonxml::redirection = 0;
697: $Apache::lonxml::metamode = 0;
698: $Apache::lonxml::evaluate = 0;
699: $Apache::lonxml::import = 0;
700: } elsif ($target eq 'analyze') {
701: $Apache::lonxml::redirection = 0;
702: $Apache::lonxml::metamode = 0;
703: $Apache::lonxml::evaluate = 1;
704: $Apache::lonxml::import = 1;
705: } else {
706: $Apache::lonxml::redirection = 0;
707: $Apache::lonxml::metamode = 0;
708: $Apache::lonxml::evaluate = 1;
709: $Apache::lonxml::import = 1;
710: }
711: }
712:
713: sub init_safespace {
714: my ($target,$safeeval,$safehole,$safeinit) = @_;
715: $safeeval->deny_only(':dangerous');
716: $safeeval->reval('use Math::Complex;');
717: $safeeval->permit_only(":default");
718: $safeeval->permit("entereval");
719: $safeeval->permit(":base_math");
720: $safeeval->permit("sort");
721: $safeeval->permit("time");
722: $safeeval->permit("caller");
723: $safeeval->deny("rand");
724: $safeeval->deny("srand");
725: $safeeval->deny(":base_io");
726: $safehole->wrap(\&Apache::scripttag::xmlparse,$safeeval,'&xmlparse');
727: $safehole->wrap(\&Apache::outputtags::multipart,$safeeval,'&multipart');
728: $safehole->wrap(\&Apache::lonnet::EXT,$safeeval,'&EXT');
729: $safehole->wrap(\&Apache::chemresponse::chem_standard_order,$safeeval,
730: '&chem_standard_order');
731: $safehole->wrap(\&Apache::response::check_status,$safeeval,'&check_status');
732: $safehole->wrap(\&Apache::response::implicit_multiplication,$safeeval,'&implicit_multiplication');
733:
734: $safehole->wrap(\&Apache::lonmaxima::maxima_eval,$safeeval,'&maxima_eval');
735: $safehole->wrap(\&Apache::lonmaxima::maxima_check,$safeeval,'&maxima_check');
736: $safehole->wrap(\&Apache::lonmaxima::maxima_cas_formula_fix,$safeeval,
737: '&maxima_cas_formula_fix');
738:
739: $safehole->wrap(\&Apache::caparesponse::capa_formula_fix,$safeeval,
740: '&capa_formula_fix');
741:
742: $safehole->wrap(\&Apache::lonlocal::locallocaltime,$safeeval,
743: '&locallocaltime');
744:
745: $safehole->wrap(\&Math::Cephes::asin,$safeeval,'&asin');
746: $safehole->wrap(\&Math::Cephes::acos,$safeeval,'&acos');
747: $safehole->wrap(\&Math::Cephes::atan,$safeeval,'&atan');
748: $safehole->wrap(\&Math::Cephes::sinh,$safeeval,'&sinh');
749: $safehole->wrap(\&Math::Cephes::cosh,$safeeval,'&cosh');
750: $safehole->wrap(\&Math::Cephes::tanh,$safeeval,'&tanh');
751: $safehole->wrap(\&Math::Cephes::asinh,$safeeval,'&asinh');
752: $safehole->wrap(\&Math::Cephes::acosh,$safeeval,'&acosh');
753: $safehole->wrap(\&Math::Cephes::atanh,$safeeval,'&atanh');
754: $safehole->wrap(\&Math::Cephes::erf,$safeeval,'&erf');
755: $safehole->wrap(\&Math::Cephes::erfc,$safeeval,'&erfc');
756: $safehole->wrap(\&Math::Cephes::j0,$safeeval,'&j0');
757: $safehole->wrap(\&Math::Cephes::j1,$safeeval,'&j1');
758: $safehole->wrap(\&Math::Cephes::jn,$safeeval,'&jn');
759: $safehole->wrap(\&Math::Cephes::jv,$safeeval,'&jv');
760: $safehole->wrap(\&Math::Cephes::y0,$safeeval,'&y0');
761: $safehole->wrap(\&Math::Cephes::y1,$safeeval,'&y1');
762: $safehole->wrap(\&Math::Cephes::yn,$safeeval,'&yn');
763: $safehole->wrap(\&Math::Cephes::yv,$safeeval,'&yv');
764:
765: $safehole->wrap(\&Math::Cephes::bdtr ,$safeeval,'&bdtr' );
766: $safehole->wrap(\&Math::Cephes::bdtrc ,$safeeval,'&bdtrc' );
767: $safehole->wrap(\&Math::Cephes::bdtri ,$safeeval,'&bdtri' );
768: $safehole->wrap(\&Math::Cephes::btdtr ,$safeeval,'&btdtr' );
769: $safehole->wrap(\&Math::Cephes::chdtr ,$safeeval,'&chdtr' );
770: $safehole->wrap(\&Math::Cephes::chdtrc,$safeeval,'&chdtrc');
771: $safehole->wrap(\&Math::Cephes::chdtri,$safeeval,'&chdtri');
772: $safehole->wrap(\&Math::Cephes::fdtr ,$safeeval,'&fdtr' );
773: $safehole->wrap(\&Math::Cephes::fdtrc ,$safeeval,'&fdtrc' );
774: $safehole->wrap(\&Math::Cephes::fdtri ,$safeeval,'&fdtri' );
775: $safehole->wrap(\&Math::Cephes::gdtr ,$safeeval,'&gdtr' );
776: $safehole->wrap(\&Math::Cephes::gdtrc ,$safeeval,'&gdtrc' );
777: $safehole->wrap(\&Math::Cephes::nbdtr ,$safeeval,'&nbdtr' );
778: $safehole->wrap(\&Math::Cephes::nbdtrc,$safeeval,'&nbdtrc');
779: $safehole->wrap(\&Math::Cephes::nbdtri,$safeeval,'&nbdtri');
780: $safehole->wrap(\&Math::Cephes::ndtr ,$safeeval,'&ndtr' );
781: $safehole->wrap(\&Math::Cephes::ndtri ,$safeeval,'&ndtri' );
782: $safehole->wrap(\&Math::Cephes::pdtr ,$safeeval,'&pdtr' );
783: $safehole->wrap(\&Math::Cephes::pdtrc ,$safeeval,'&pdtrc' );
784: $safehole->wrap(\&Math::Cephes::pdtri ,$safeeval,'&pdtri' );
785: $safehole->wrap(\&Math::Cephes::stdtr ,$safeeval,'&stdtr' );
786: $safehole->wrap(\&Math::Cephes::stdtri,$safeeval,'&stdtri');
787:
788: $safehole->wrap(\&Math::Cephes::Matrix::mat,$safeeval,'&mat');
789: $safehole->wrap(\&Math::Cephes::Matrix::new,$safeeval,
790: '&Math::Cephes::Matrix::new');
791: $safehole->wrap(\&Math::Cephes::Matrix::coef,$safeeval,
792: '&Math::Cephes::Matrix::coef');
793: $safehole->wrap(\&Math::Cephes::Matrix::clr,$safeeval,
794: '&Math::Cephes::Matrix::clr');
795: $safehole->wrap(\&Math::Cephes::Matrix::add,$safeeval,
796: '&Math::Cephes::Matrix::add');
797: $safehole->wrap(\&Math::Cephes::Matrix::sub,$safeeval,
798: '&Math::Cephes::Matrix::sub');
799: $safehole->wrap(\&Math::Cephes::Matrix::mul,$safeeval,
800: '&Math::Cephes::Matrix::mul');
801: $safehole->wrap(\&Math::Cephes::Matrix::div,$safeeval,
802: '&Math::Cephes::Matrix::div');
803: $safehole->wrap(\&Math::Cephes::Matrix::inv,$safeeval,
804: '&Math::Cephes::Matrix::inv');
805: $safehole->wrap(\&Math::Cephes::Matrix::transp,$safeeval,
806: '&Math::Cephes::Matrix::transp');
807: $safehole->wrap(\&Math::Cephes::Matrix::simq,$safeeval,
808: '&Math::Cephes::Matrix::simq');
809: $safehole->wrap(\&Math::Cephes::Matrix::mat_to_vec,$safeeval,
810: '&Math::Cephes::Matrix::mat_to_vec');
811: $safehole->wrap(\&Math::Cephes::Matrix::vec_to_mat,$safeeval,
812: '&Math::Cephes::Matrix::vec_to_mat');
813: $safehole->wrap(\&Math::Cephes::Matrix::check,$safeeval,
814: '&Math::Cephes::Matrix::check');
815: $safehole->wrap(\&Math::Cephes::Matrix::check,$safeeval,
816: '&Math::Cephes::Matrix::check');
817:
818: # $safehole->wrap(\&Math::Cephes::new_fract,$safeeval,'&new_fract');
819: # $safehole->wrap(\&Math::Cephes::radd,$safeeval,'&radd');
820: # $safehole->wrap(\&Math::Cephes::rsub,$safeeval,'&rsub');
821: # $safehole->wrap(\&Math::Cephes::rmul,$safeeval,'&rmul');
822: # $safehole->wrap(\&Math::Cephes::rdiv,$safeeval,'&rdiv');
823: # $safehole->wrap(\&Math::Cephes::euclid,$safeeval,'&euclid');
824:
825: $safehole->wrap(\&Math::Random::random_beta,$safeeval,'&math_random_beta');
826: $safehole->wrap(\&Math::Random::random_chi_square,$safeeval,'&math_random_chi_square');
827: $safehole->wrap(\&Math::Random::random_exponential,$safeeval,'&math_random_exponential');
828: $safehole->wrap(\&Math::Random::random_f,$safeeval,'&math_random_f');
829: $safehole->wrap(\&Math::Random::random_gamma,$safeeval,'&math_random_gamma');
830: $safehole->wrap(\&Math::Random::random_multivariate_normal,$safeeval,'&math_random_multivariate_normal');
831: $safehole->wrap(\&Math::Random::random_multinomial,$safeeval,'&math_random_multinomial');
832: $safehole->wrap(\&Math::Random::random_noncentral_chi_square,$safeeval,'&math_random_noncentral_chi_square');
833: $safehole->wrap(\&Math::Random::random_noncentral_f,$safeeval,'&math_random_noncentral_f');
834: $safehole->wrap(\&Math::Random::random_normal,$safeeval,'&math_random_normal');
835: $safehole->wrap(\&Math::Random::random_permutation,$safeeval,'&math_random_permutation');
836: $safehole->wrap(\&Math::Random::random_permuted_index,$safeeval,'&math_random_permuted_index');
837: $safehole->wrap(\&Math::Random::random_uniform,$safeeval,'&math_random_uniform');
838: $safehole->wrap(\&Math::Random::random_poisson,$safeeval,'&math_random_poisson');
839: $safehole->wrap(\&Math::Random::random_uniform_integer,$safeeval,'&math_random_uniform_integer');
840: $safehole->wrap(\&Math::Random::random_negative_binomial,$safeeval,'&math_random_negative_binomial');
841: $safehole->wrap(\&Math::Random::random_binomial,$safeeval,'&math_random_binomial');
842: $safehole->wrap(\&Math::Random::random_seed_from_phrase,$safeeval,'&random_seed_from_phrase');
843: $safehole->wrap(\&Math::Random::random_set_seed_from_phrase,$safeeval,'&random_set_seed_from_phrase');
844: $safehole->wrap(\&Math::Random::random_get_seed,$safeeval,'&random_get_seed');
845: $safehole->wrap(\&Math::Random::random_set_seed,$safeeval,'&random_set_seed');
846: $safehole->wrap(\&Apache::loncommon::languages,$safeeval,'&languages');
847: $safehole->wrap(\&Apache::lonxml::error,$safeeval,'&LONCAPA_INTERNAL_ERROR');
848: $safehole->wrap(\&Apache::lonxml::debug,$safeeval,'&LONCAPA_INTERNAL_DEBUG');
849: $safehole->wrap(\&Apache::lonnet::logthis,$safeeval,'&LONCAPA_INTERNAL_LOGTHIS');
850: $safehole->wrap(\&Apache::inputtags::finalizeawards,$safeeval,'&LONCAPA_INTERNAL_FINALIZEAWARDS');
851: $safehole->wrap(\&Apache::caparesponse::get_sigrange,$safeeval,'&LONCAPA_INTERNAL_get_sigrange');
852: # use Data::Dumper;
853: # $safehole->wrap(\&Data::Dumper::Dumper,$safeeval,'&LONCAPA_INTERNAL_Dumper');
854: #need to inspect this class of ops
855: # $safeeval->deny(":base_orig");
856: $safeeval->permit("require");
857: $safeinit .= ';$external::target="'.$target.'";';
858: &Apache::run::run($safeinit,$safeeval);
859: &initialize_rndseed($safeeval);
860: }
861:
862: sub clean_safespace {
863: my ($safeeval) = @_;
864: delete_package_recurse($safeeval->{Root});
865: }
866:
867: sub delete_package_recurse {
868: my ($package) = @_;
869: my @subp;
870: {
871: no strict 'refs';
872: while (my ($key,$val) = each(%{*{"$package\::"}})) {
873: if (!defined($val)) { next; }
874: local (*ENTRY) = $val;
875: if (defined *ENTRY{HASH} && $key =~ /::$/ &&
876: $key ne "main::" && $key ne "<none>::")
877: {
878: my ($p) = $package ne "main" ? "$package\::" : "";
879: ($p .= $key) =~ s/::$//;
880: push(@subp,$p);
881: }
882: }
883: }
884: foreach my $p (@subp) {
885: delete_package_recurse($p);
886: }
887: Symbol::delete_package($package);
888: }
889:
890: sub initialize_rndseed {
891: my ($safeeval)=@_;
892: my $rndseed;
893: my ($symb,$courseid,$domain,$name) = &Apache::lonnet::whichuser();
894: $rndseed=&Apache::lonnet::rndseed($symb,$courseid,$domain,$name);
895: my $safeinit = '$external::randomseed="'.$rndseed.'";';
896: &Apache::lonxml::debug("Setting rndseed to $rndseed");
897: &Apache::run::run($safeinit,$safeeval);
898: }
899:
900: sub default_homework_load {
901: my ($safeeval)=@_;
902: &Apache::lonxml::debug('Loading default_homework');
903: my $default=&Apache::lonnet::getfile('/home/httpd/html/res/adm/includes/default_homework.lcpm');
904: if ($default eq -1) {
905: &Apache::lonxml::error("<b>Unable to find <i>default_homework.lcpm</i></b>");
906: } else {
907: &Apache::run::run($default,$safeeval);
908: $Apache::lonxml::default_homework_loaded=1;
909: }
910: }
911:
912: {
913: my $alarm_depth;
914: sub init_alarm {
915: alarm(0);
916: $alarm_depth=0;
917: }
918:
919: sub start_alarm {
920: if ($alarm_depth<1) {
921: my $old=alarm($Apache::lonnet::perlvar{'lonScriptTimeout'});
922: if ($old) {
923: &Apache::lonxml::error("Cancelled an alarm of $old, this shouldn't occur.");
924: }
925: }
926: $alarm_depth++;
927: }
928:
929: sub end_alarm {
930: $alarm_depth--;
931: if ($alarm_depth<1) { alarm(0); }
932: }
933: }
934: my $metamode_was;
935: sub startredirection {
936: if (!$Apache::lonxml::redirection) {
937: $metamode_was=$Apache::lonxml::metamode;
938: }
939: $Apache::lonxml::metamode=0;
940: $Apache::lonxml::redirection++;
941: push (@Apache::lonxml::outputstack, '');
942: }
943:
944: sub endredirection {
945: if (!$Apache::lonxml::redirection) {
946: &Apache::lonxml::error("Endredirection was called before a startredirection, perhaps you have unbalanced tags. Some debugging information:".join ":",caller);
947: return '';
948: }
949: $Apache::lonxml::redirection--;
950: if (!$Apache::lonxml::redirection) {
951: $Apache::lonxml::metamode=$metamode_was;
952: }
953: pop @Apache::lonxml::outputstack;
954: }
955: sub in_redirection {
956: return ($Apache::lonxml::redirection > 0)
957: }
958:
959: sub end_tag {
960: my ($tagstack,$parstack,$token)=@_;
961: pop(@$tagstack);
962: pop(@$parstack);
963: &decreasedepth($token);
964: }
965:
966: sub initdepth {
967: @Apache::lonxml::depthcounter=();
968: undef($Apache::lonxml::last_depth_count);
969: }
970:
971:
972: my @timers;
973: my $lasttime;
974: # @Apache::lonxml::depthcounter -> count of tags that exist so
975: # far at each level
976: # $Apache::lonxml::last_depth_count -> when ascending, need to
977: # remember the count for the level below the current level (for
978: # example going from 1_2 -> 1 -> 1_3 need to remember the 2 )
979:
980: sub increasedepth {
981: my ($token) = @_;
982: push(@Apache::lonxml::depthcounter,$Apache::lonxml::last_depth_count+1);
983: undef($Apache::lonxml::last_depth_count);
984: my $time;
985: if ($Apache::lonxml::debug eq "1") {
986: push(@timers,[&gettimeofday()]);
987: $time=&tv_interval($lasttime);
988: $lasttime=[&gettimeofday()];
989: }
990: my $spacing=' 'x($#Apache::lonxml::depthcounter);
991: $Apache::lonxml::curdepth=join('_',@Apache::lonxml::depthcounter);
992: # &Apache::lonxml::debug("s$spacing$Apache::lonxml::depth : $Apache::lonxml::olddepth : $Apache::lonxml::curdepth : $token->[1] : $time");
993: #print "<br />s $Apache::lonxml::depth : $Apache::lonxml::olddepth : $curdepth : $token->[1]\n";
994: }
995:
996: sub decreasedepth {
997: my ($token) = @_;
998: if ( $#Apache::lonxml::depthcounter == -1) {
999: &Apache::lonxml::warning(&mt("Missing tags, unable to properly run file."));
1000: }
1001: $Apache::lonxml::last_depth_count = pop(@Apache::lonxml::depthcounter);
1002:
1003: my ($timer,$time);
1004: if ($Apache::lonxml::debug eq "1") {
1005: $timer=pop(@timers);
1006: $time=&tv_interval($lasttime);
1007: $lasttime=[&gettimeofday()];
1008: }
1009: my $spacing=' 'x($#Apache::lonxml::depthcounter);
1010: $Apache::lonxml::curdepth = join('_',@Apache::lonxml::depthcounter);
1011: # &Apache::lonxml::debug("e$spacing$Apache::lonxml::depth : $Apache::lonxml::olddepth : $Apache::lonxml::curdepth : $token->[1] : $time : ".&tv_interval($timer));
1012: #print "<br />e $Apache::lonxml::depth : $Apache::lonxml::olddepth : $token->[1] : $curdepth\n";
1013: }
1014:
1015: sub get_id {
1016: my ($parstack,$safeeval)=@_;
1017: my $id= &Apache::lonxml::get_param('id',$parstack,$safeeval);
1018: if ($env{'request.state'} eq 'construct' && $id =~ /([._]|[^\w\d\s[:punct:]])/) {
1019: &error(&mt("ID "[_1]" contains invalid characters, IDs are only allowed to contain letters, numbers, spaces and -",'<tt>'.$id.'</tt>'));
1020: }
1021: if ($id =~ /^\s*$/) { $id = $Apache::lonxml::curdepth; }
1022: return $id;
1023: }
1024:
1025: sub get_all_text_unbalanced {
1026: #there is a copy of this in lonpublisher.pm
1027: my($tag,$pars)= @_;
1028: my $token;
1029: my $result='';
1030: $tag='<'.$tag.'>';
1031: while ($token = $$pars[-1]->get_token) {
1032: if (($token->[0] eq 'T')||($token->[0] eq 'C')||($token->[0] eq 'D')) {
1033: if ($token->[0] eq 'T' && $token->[2]) {
1034: $result.='<![CDATA['.$token->[1].']]>';
1035: } else {
1036: $result.=$token->[1];
1037: }
1038: } elsif ($token->[0] eq 'PI') {
1039: $result.=$token->[2];
1040: } elsif ($token->[0] eq 'S') {
1041: $result.=$token->[4];
1042: } elsif ($token->[0] eq 'E') {
1043: $result.=$token->[2];
1044: }
1045: if ($result =~ /\Q$tag\E/is) {
1046: ($result,my $redo)=$result =~ /(.*)\Q$tag\E(.*)/is;
1047: #&Apache::lonxml::debug('Got a winner with leftovers ::'.$2);
1048: #&Apache::lonxml::debug('Result is :'.$1);
1049: $redo=$tag.$redo;
1050: &Apache::lonxml::newparser($pars,\$redo);
1051: last;
1052: }
1053: }
1054: return $result
1055:
1056: }
1057:
1058: #########################################################################
1059: # #
1060: # bubble line counter management #
1061: # #
1062: #########################################################################
1063:
1064: =pod
1065:
1066: For bubble grading mode and exam bubble printing mode, the tracking of
1067: the current 'bubble line number' is stored in the %env element
1068: 'form.counter', and is modifed and handled by the following routines.
1069:
1070: The value of it is stored in $Apache:lonxml::counter when live and
1071: stored back to env after done.
1072:
1073: =item &increment_counter($increment);
1074:
1075: Increments the internal counter environment variable a specified amount
1076:
1077: Optional Arguments:
1078: $increment - amount to increment by (defaults to 1)
1079: Also 1 if the value is negative or zero.
1080: $part_response - A concatenation of the part and response id
1081: identifying exactly what is being 'answered'.
1082:
1083:
1084: =cut
1085:
1086: sub increment_counter {
1087: my ($increment, $part_response) = @_;
1088: if ($env{'form.grade_noincrement'}) { return; }
1089: if (!defined($increment) || $increment le 0) {
1090: $increment = 1;
1091: }
1092: $Apache::lonxml::counter += $increment;
1093:
1094: # If the caller supplied the response_id parameter,
1095: # Maintain its counter.. creating if necessary.
1096:
1097: if (defined($part_response)) {
1098: if (!defined($Apache::lonxml::counters_per_part{$part_response})) {
1099: $Apache::lonxml::counters_per_part{$part_response} = 0;
1100: }
1101: $Apache::lonxml::counters_per_part{$part_response} += $increment;
1102: my $new_value = $Apache::lonxml::counters_per_part{$part_response};
1103: }
1104:
1105: $Apache::lonxml::counter_changed=1;
1106: }
1107:
1108: =pod
1109:
1110: =item &init_counter($increment);
1111:
1112: Initialize the internal counter environment variable
1113:
1114: =cut
1115:
1116: sub init_counter {
1117: if ($env{'request.state'} eq 'construct') {
1118: $Apache::lonxml::counter=1;
1119: $Apache::lonxml::counter_changed=1;
1120: } elsif (defined($env{'form.counter'})) {
1121: $Apache::lonxml::counter=$env{'form.counter'};
1122: $Apache::lonxml::counter_changed=0;
1123: } else {
1124: $Apache::lonxml::counter=1;
1125: $Apache::lonxml::counter_changed=1;
1126: }
1127: }
1128:
1129: sub store_counter {
1130: &Apache::lonnet::appenv({'form.counter' => $Apache::lonxml::counter});
1131: $Apache::lonxml::counter_changed=0;
1132: return '';
1133: }
1134:
1135: {
1136: my $state;
1137: sub clear_problem_counter {
1138: undef($state);
1139: &Apache::lonnet::delenv('form.counter');
1140: &Apache::lonxml::init_counter();
1141: &Apache::lonxml::store_counter();
1142: }
1143:
1144: sub remember_problem_counter {
1145: &Apache::lonnet::transfer_profile_to_env(undef,undef,1);
1146: $state = $env{'form.counter'};
1147: }
1148:
1149: sub restore_problem_counter {
1150: if (defined($state)) {
1151: &Apache::lonnet::appenv({'form.counter' => $state});
1152: }
1153: }
1154: sub get_problem_counter {
1155: if ($Apache::lonxml::counter_changed) { &store_counter() }
1156: &Apache::lonnet::transfer_profile_to_env(undef,undef,1);
1157: return $env{'form.counter'};
1158: }
1159: }
1160:
1161: =pod
1162:
1163: =item bubble_lines_for_part(part_response)
1164:
1165: Returns the number of lines required to get a response for
1166: $part_response (this is just $Apache::lonxml::counters_per_part{$part_response}
1167:
1168: =cut
1169:
1170: sub bubble_lines_for_part {
1171: my ($part_response) = @_;
1172:
1173: if (!defined($Apache::lonxml::counters_per_part{$part_response})) {
1174: return 0;
1175: } else {
1176: return $Apache::lonxml::counters_per_part{$part_response};
1177: }
1178: }
1179:
1180: =pod
1181:
1182: =item clear_bubble_lines_for_part
1183:
1184: Clears the hash of bubble lines per part. If a caller
1185: needs to analyze several resources this should be called between
1186: resources to reset the hash for each problem being analyzed.
1187:
1188: =cut
1189:
1190: sub clear_bubble_lines_for_part {
1191: undef(%Apache::lonxml::counters_per_part);
1192: }
1193:
1194: =pod
1195:
1196: =item set_bubble_lines(part_response, value)
1197:
1198: If there is a problem part, that for whatever reason
1199: requires bubble lines that are not
1200: the same as the counter increment, it can call this sub during
1201: analysis to set its hash value explicitly.
1202:
1203: =cut
1204:
1205: sub set_bubble_lines {
1206: my ($part_response, $value) = @_;
1207:
1208: $Apache::lonxml::counters_per_part{$part_response} = $value;
1209: }
1210:
1211: =pod
1212:
1213: =item get_bubble_line_hash
1214:
1215: Returns the current bubble line hash. This is assumed to
1216: be small so we return a copy
1217:
1218:
1219: =cut
1220:
1221: sub get_bubble_line_hash {
1222: return %Apache::lonxml::counters_per_part;
1223: }
1224:
1225:
1226: #--------------------------------------------------
1227:
1228: sub get_all_text {
1229: my($tag,$pars,$style)= @_;
1230: my $gotfullstack=1;
1231: if (ref($pars) ne 'ARRAY') {
1232: $gotfullstack=0;
1233: $pars=[$pars];
1234: }
1235: if (ref($style) ne 'HASH') {
1236: $style={};
1237: }
1238: my $depth=0;
1239: my $token;
1240: my $result='';
1241: if ( $tag =~ m:^/: ) {
1242: my $tag=substr($tag,1);
1243: #&Apache::lonxml::debug("have:$tag:");
1244: my $top_empty=0;
1245: while (($depth >=0) && ($#$pars > -1) && (!$top_empty)) {
1246: while (($depth >=0) && ($token = $$pars[-1]->get_token)) {
1247: #&Apache::lonxml::debug("e token:$token->[0]:$depth:$token->[1]:".$#$pars.":".$#Apache::lonxml::pwd);
1248: if (($token->[0] eq 'T')||($token->[0] eq 'C')||($token->[0] eq 'D')) {
1249: if ($token->[2]) {
1250: $result.='<![CDATA['.$token->[1].']]>';
1251: } else {
1252: $result.=$token->[1];
1253: }
1254: } elsif ($token->[0] eq 'PI') {
1255: $result.=$token->[2];
1256: } elsif ($token->[0] eq 'S') {
1257: if ($token->[1] =~ /^\Q$tag\E$/i) { $depth++; }
1258: if ($token->[1] =~ /^LONCAPA_INTERNAL_TURN_STYLE_ON$/) { $Apache::lonxml::usestyle=1; }
1259: if ($token->[1] =~ /^LONCAPA_INTERNAL_TURN_STYLE_OFF$/) { $Apache::lonxml::usestyle=0; }
1260: $result.=$token->[4];
1261: } elsif ($token->[0] eq 'E') {
1262: if ( $token->[1] =~ /^\Q$tag\E$/i) { $depth--; }
1263: #skip sending back the last end tag
1264: if ($depth == 0 && exists($$style{'/'.$token->[1]}) && $Apache::lonxml::usestyle) {
1265: my $string=
1266: '<LONCAPA_INTERNAL_TURN_STYLE_OFF end="yes" />'.
1267: $$style{'/'.$token->[1]}.
1268: $token->[2].
1269: '<LONCAPA_INTERNAL_TURN_STYLE_ON />';
1270: &Apache::lonxml::newparser($pars,\$string);
1271: #&Apache::lonxml::debug("reParsing $string");
1272: next;
1273: }
1274: if ($depth > -1) {
1275: $result.=$token->[2];
1276: } else {
1277: $$pars[-1]->unget_token($token);
1278: }
1279: }
1280: }
1281: if (($depth >=0) && ($#$pars == 0) ) { $top_empty=1; }
1282: if (($depth >=0) && ($#$pars > 0) ) {
1283: pop(@$pars);
1284: pop(@Apache::lonxml::pwd);
1285: }
1286: }
1287: if ($top_empty && $depth >= 0) {
1288: #never found the end tag ran out of text, throw error send back blank
1289: &error('Never found end tag for <'.$tag.
1290: '> current string <pre>'.
1291: &HTML::Entities::encode($result,'<>&"').
1292: '</pre>');
1293: if ($gotfullstack) {
1294: my $newstring='</'.$tag.'>'.$result;
1295: &Apache::lonxml::newparser($pars,\$newstring);
1296: }
1297: $result='';
1298: }
1299: } else {
1300: while ($#$pars > -1) {
1301: while ($token = $$pars[-1]->get_token) {
1302: #&Apache::lonxml::debug("s token:$token->[0]:$depth:$token->[1]");
1303: if (($token->[0] eq 'T')||($token->[0] eq 'C')||
1304: ($token->[0] eq 'D')) {
1305: if ($token->[2]) {
1306: $result.='<![CDATA['.$token->[1].']]>';
1307: } else {
1308: $result.=$token->[1];
1309: }
1310: } elsif ($token->[0] eq 'PI') {
1311: $result.=$token->[2];
1312: } elsif ($token->[0] eq 'S') {
1313: if ( $token->[1] =~ /^\Q$tag\E$/i) {
1314: $$pars[-1]->unget_token($token); last;
1315: } else {
1316: $result.=$token->[4];
1317: }
1318: if ($token->[1] =~ /^LONCAPA_INTERNAL_TURN_STYLE_ON$/) { $Apache::lonxml::usestyle=1; }
1319: if ($token->[1] =~ /^LONCAPA_INTERNAL_TURN_STYLE_OFF$/) { $Apache::lonxml::usestyle=0; }
1320: } elsif ($token->[0] eq 'E') {
1321: $result.=$token->[2];
1322: }
1323: }
1324: if (($#$pars > 0) ) {
1325: pop(@$pars);
1326: pop(@Apache::lonxml::pwd);
1327: } else { last; }
1328: }
1329: }
1330: #&Apache::lonxml::debug("Exit:$result:");
1331: return $result
1332: }
1333:
1334: sub newparser {
1335: my ($parser,$contentref,$dir) = @_;
1336: push (@$parser,HTML::LCParser->new($contentref));
1337: $$parser[-1]->xml_mode(1);
1338: $$parser[-1]->marked_sections(1);
1339: if ( $dir eq '' ) {
1340: push (@Apache::lonxml::pwd, $Apache::lonxml::pwd[$#Apache::lonxml::pwd]);
1341: } else {
1342: push (@Apache::lonxml::pwd, $dir);
1343: }
1344: }
1345:
1346: sub parstring {
1347: my ($token) = @_;
1348: my (@vars,@values);
1349: foreach my $attr (@{$token->[3]}) {
1350: if ($attr!~/\W/) {
1351: my $val=$token->[2]->{$attr};
1352: $val =~ s/([\%\@\\\"\'])/\\$1/g;
1353: $val =~ s/(\$[^\{a-zA-Z_])/\\$1/g;
1354: $val =~ s/(\$)$/\\$1/;
1355: #if ($val =~ m/^[\%\@]/) { $val="\\".$val; }
1356: push(@vars,"\$$attr");
1357: push(@values,"\"$val\"");
1358: }
1359: }
1360: my $var_init =
1361: (@vars) ? 'my ('.join(',',@vars).') = ('.join(',',@values).');'
1362: : '';
1363: return $var_init;
1364: }
1365:
1366: sub extlink {
1367: my ($res,$exact)=@_;
1368: if (!$exact) {
1369: $res=&Apache::lonnet::hreflocation($Apache::lonxml::pwd[-1],$res);
1370: }
1371: push(@Apache::lonxml::extlinks,$res)
1372: }
1373:
1374: sub writeallows {
1375: unless ($#extlinks>=0) { return; }
1376: my $thisurl = &Apache::lonnet::clutter(shift);
1377: if ($env{'httpref.'.$thisurl}) {
1378: $thisurl=$env{'httpref.'.$thisurl};
1379: }
1380: my $thisdir=$thisurl;
1381: $thisdir=~s/\/[^\/]+$//;
1382: my %httpref=();
1383: foreach (@extlinks) {
1384: $httpref{'httpref.'.
1385: &Apache::lonnet::hreflocation($thisdir,&unescape($_))}=$thisurl;
1386: }
1387: @extlinks=();
1388: &Apache::lonnet::appenv(\%httpref);
1389: }
1390:
1391: sub register_ssi {
1392: my ($url,%form)=@_;
1393: push (@Apache::lonxml::ssi_info,{'url'=>$url,'form'=>\%form});
1394: return '';
1395: }
1396:
1397: sub do_registered_ssi {
1398: foreach my $info (@Apache::lonxml::ssi_info) {
1399: my %form=%{ $info->{'form'}};
1400: my $url=$info->{'url'};
1401: &Apache::lonnet::ssi($url,%form);
1402: }
1403: }
1404:
1405: sub add_script_result {
1406: my ($display) = @_;
1407: push(@script_var_displays, $display);
1408: }
1409:
1410: #
1411: # Afterburner handles anchors, highlights and links
1412: #
1413: sub afterburn {
1414: my $result=shift;
1415: &Apache::loncommon::get_unprocessed_cgi($ENV{'QUERY_STRING'},
1416: ['highlight','anchor','link']);
1417: if ($env{'form.highlight'}) {
1418: foreach (split(/\,/,$env{'form.highlight'})) {
1419: my $anchorname=$_;
1420: my $matchthis=$anchorname;
1421: $matchthis=~s/\_+/\\s\+/g;
1422: $result=~s/(\Q$matchthis\E)/\<font color=\"red\"\>$1\<\/font\>/gs;
1423: }
1424: }
1425: if ($env{'form.link'}) {
1426: foreach (split(/\,/,$env{'form.link'})) {
1427: my ($anchorname,$linkurl)=split(/\>/,$_);
1428: my $matchthis=$anchorname;
1429: $matchthis=~s/\_+/\\s\+/g;
1430: $result=~s/(\Q$matchthis\E)/\<a href=\"$linkurl\"\>$1\<\/a\>/gs;
1431: }
1432: }
1433: if ($env{'form.anchor'}) {
1434: my $anchorname=$env{'form.anchor'};
1435: my $matchthis=$anchorname;
1436: $matchthis=~s/\_+/\\s\+/g;
1437: $result=~s/(\Q$matchthis\E)/\<a name=\"$anchorname\"\>$1\<\/a\>/s;
1438: $result.=(<<"ENDSCRIPT");
1439: <script type="text/javascript">
1440: document.location.hash='$anchorname';
1441: </script>
1442: ENDSCRIPT
1443: }
1444: return $result;
1445: }
1446:
1447: sub storefile {
1448: my ($file,$contents)=@_;
1449: &Apache::lonnet::correct_line_ends(\$contents);
1450: if (my $fh=Apache::File->new('>'.$file)) {
1451: print $fh $contents;
1452: $fh->close();
1453: return 1;
1454: } else {
1455: &warning(&mt('Unable to save file [_1]','<tt>'.$file.'</tt>'));
1456: return 0;
1457: }
1458: }
1459:
1460: sub createnewhtml {
1461: my $title=&mt('Title of document goes here');
1462: my $body=&mt('Body of document goes here');
1463: my $filecontents=(<<SIMPLECONTENT);
1464: <html>
1465: <head>
1466: <title>$title</title>
1467: </head>
1468: <body bgcolor="#FFFFFF">
1469: $body
1470: </body>
1471: </html>
1472: SIMPLECONTENT
1473: return $filecontents;
1474: }
1475:
1476: sub createnewsty {
1477: my $filecontents=(<<SIMPLECONTENT);
1478: <definetag name="">
1479: <render>
1480: <web></web>
1481: <tex></tex>
1482: </render>
1483: </definetag>
1484: SIMPLECONTENT
1485: return $filecontents;
1486: }
1487:
1488: sub verify_html {
1489: my ($filecontents)=@_;
1490: if ($filecontents!~/(?:\<|\<\;)(?:html|xml)[^\<]*(?:\>|\>\;)/is) {
1491: return &mt('File does not have [_1] or [_2] starting tag','<html>','<xml>');
1492: }
1493: if ($filecontents!~/(?:\<|\<\;)\/(?:html|xml)(?:\>|\>\;)/is) {
1494: return &mt('File does not have [_1] or [_2] ending tag','<html>','<xml>');
1495: }
1496: if ($filecontents!~/(?:\<|\<\;)(?:body|frameset)[^\<]*(?:\>|\>\;)/is) {
1497: return &mt('File does not have [_1] or [_2] starting tag','<body>','<frameset>');
1498: }
1499: if ($filecontents!~/(?:\<|\<\;)\/(?:body|frameset)[^\<]*(?:\>|\>\;)/is) {
1500: return &mt('File does not have [_1] or [_2] ending tag','<body>','<frameset>');
1501: }
1502: return '';
1503: }
1504:
1505: sub renderingoptions {
1506: my %langchoices=('' => '');
1507: foreach (&Apache::loncommon::languageids()) {
1508: if (&Apache::loncommon::supportedlanguagecode($_)) {
1509: $langchoices{&Apache::loncommon::supportedlanguagecode($_)}
1510: = &Apache::loncommon::plainlanguagedescription($_);
1511: }
1512: }
1513: return
1514: '<span class="LC_nobreak">'.
1515: &mt('Language:').' '.
1516: &Apache::loncommon::select_form($env{'form.languages'},'languages',
1517: %langchoices).'
1518: </span>
1519: <span class="LC_nobreak">'.
1520: &mt('Math Rendering:').' '.
1521: &Apache::loncommon::select_form($env{'form.texengine'},'texengine',
1522: ('' => '',
1523: 'tth' => 'tth (TeX to HTML)',
1524: 'jsMath' => 'jsMath',
1525: 'mimetex' => 'mimetex (Convert to Images)')).'
1526: </span>';
1527: }
1528:
1529: sub inserteditinfo {
1530: my ($filecontents, $filetype, $filename)=@_;
1531: $filecontents = &HTML::Entities::encode($filecontents,'<>&"');
1532: my $xml_help = '';
1533: my $initialize='';
1534: my $textarea_id = 'filecont';
1535: my ($add_to_onload, $add_to_onresize);
1536: $initialize=&Apache::lonhtmlcommon::spellheader();
1537: if ($filetype eq 'html'
1538: && (!&Apache::lonhtmlcommon::htmlareablocked() &&
1539: &Apache::lonhtmlcommon::htmlareabrowser())) {
1540: $textarea_id .= '___Frame';
1541: my $lang = &Apache::lonhtmlcommon::htmlarea_lang();
1542: $initialize.=(<<FULLPAGE);
1543: <script type="text/javascript">
1544: lonca
1545: function initDocument() {
1546: var oFCKeditor = new FCKeditor('filecont');
1547: oFCKeditor.Config['CustomConfigurationsPath'] = '/fckeditor/loncapaconfig.js' ;
1548: oFCKeditor.Config['FullPage'] = true
1549: oFCKeditor.Config['AutoDetectLanguage'] = false;
1550: oFCKeditor.Config['DefaultLanguage'] = "$lang";
1551: oFCKeditor.ReplaceTextarea();
1552: }
1553: function check_if_dirty(editor) {
1554: if (editor.IsDirty()) {
1555: unClean();
1556: }
1557: }
1558: function FCKeditor_OnComplete(editor) {
1559: editor.Events.AttachEvent("OnSelectionChange",check_if_dirty);
1560: resize_textarea('$textarea_id','LC_aftertextarea');
1561: }
1562: </script>
1563: FULLPAGE
1564: } else {
1565: $initialize.=(<<FULLPAGE);
1566: <script type="text/javascript">
1567: function initDocument() {
1568: resize_textarea('$textarea_id','LC_aftertextarea');
1569: }
1570: </script>
1571: FULLPAGE
1572: }
1573:
1574: $add_to_onload = 'initDocument();';
1575: $add_to_onresize = "resize_textarea('$textarea_id','LC_aftertextarea');";
1576:
1577: if ($filetype eq 'html') {
1578: $xml_help=&Apache::loncommon::helpLatexCheatsheet();
1579: }
1580:
1581: my $titledisplay=&display_title();
1582: my %lt=&Apache::lonlocal::texthash('st' => 'Save and Edit',
1583: 'vi' => 'Save and View',
1584: 'dv' => 'Discard Edits and View',
1585: 'un' => 'undo',
1586: 'ed' => 'Edit');
1587: my $spelllink .=&Apache::lonhtmlcommon::spelllink('xmledit','filecont');
1588: my $textarea_events = &Apache::edit::element_change_detection();
1589: my $form_events = &Apache::edit::form_change_detection();
1590: my $htmlerror=&verify_html($filecontents);
1591: if ($htmlerror) {
1592: $htmlerror='<span class="LC_error">'.$htmlerror.'</span>';
1593: }
1594: my $editfooter=(<<ENDFOOTER);
1595: $initialize
1596: <a name="editsection" />
1597: <form $form_events method="post" name="xmledit">
1598: <div class="LC_edit_problem_editxml_header">
1599: <table class="LC_edit_problem_header_title"><tr><td>
1600: $filename
1601: </td><td align="right">
1602: $xml_help
1603: </td></tr>
1604: </table>
1605: <div class="LC_edit_problem_discards">
1606: <input type="submit" name="discardview" accesskey="d" value="$lt{'dv'}" />
1607: <input type="submit" name="Undo" accesskey="u" value="$lt{'un'}" />
1608: $spelllink $htmlerror
1609: </div>
1610: <div class="LC_edit_problem_saves">
1611: <input type="submit" name="savethisfile" accesskey="s" value="$lt{'st'}" />
1612: <input type="submit" name="viewmode" accesskey="v" value="$lt{'vi'}" />
1613: </div>
1614: </div>
1615: <textarea $textarea_events style="width:100%" cols="80" rows="44" name="filecont" id="filecont">$filecontents</textarea>
1616: <div id="LC_aftertextarea">
1617: <br />
1618: $titledisplay
1619: </div>
1620: </form>
1621: </body>
1622: ENDFOOTER
1623: return ($editfooter,$add_to_onload,$add_to_onresize);;
1624: }
1625:
1626: sub get_target {
1627: my $viewgrades=&Apache::lonnet::allowed('vgr',$env{'request.course.id'});
1628: if ( $env{'request.state'} eq 'published') {
1629: if ( defined($env{'form.grade_target'})
1630: && ($viewgrades == 'F' )) {
1631: return ($env{'form.grade_target'});
1632: } elsif (defined($env{'form.grade_target'})) {
1633: if (($env{'form.grade_target'} eq 'web') ||
1634: ($env{'form.grade_target'} eq 'tex') ) {
1635: return $env{'form.grade_target'}
1636: } else {
1637: return 'web';
1638: }
1639: } else {
1640: return 'web';
1641: }
1642: } elsif ($env{'request.state'} eq 'construct') {
1643: if ( defined($env{'form.grade_target'})) {
1644: return ($env{'form.grade_target'});
1645: } else {
1646: return 'web';
1647: }
1648: } else {
1649: return 'web';
1650: }
1651: }
1652:
1653: sub handler {
1654: my $request=shift;
1655:
1656: my $target=&get_target();
1657:
1658: $Apache::lonxml::debug=$env{'user.debug'};
1659:
1660: &Apache::loncommon::content_type($request,'text/html');
1661: &Apache::loncommon::no_cache($request);
1662: if ($env{'request.state'} eq 'published') {
1663: $request->set_last_modified(&Apache::lonnet::metadata($request->uri,
1664: 'lastrevisiondate'));
1665: }
1666: $request->send_http_header;
1667:
1668: return OK if $request->header_only;
1669:
1670:
1671: my $file=&Apache::lonnet::filelocation("",$request->uri);
1672: my $filetype;
1673: if ($file =~ /\.sty$/) {
1674: $filetype='sty';
1675: } else {
1676: $filetype='html';
1677: }
1678: #
1679: # Edit action? Save file.
1680: #
1681: if (!($env{'request.state'} eq 'published')) {
1682: if ($env{'form.savethisfile'} || $env{'form.viewmode'} || $env{'form.Undo'}) {
1683: my $html_file=&Apache::lonnet::getfile($file);
1684: my $error = &Apache::lonhomework::handle_save_or_undo($request, \$html_file, \$env{'form.filecont'});
1685: if ($env{'form.savethisfile'}) {
1686: $env{'form.editmode'}='Edit'; #force edit mode
1687: }
1688: }
1689: }
1690: my %mystyle;
1691: my $result = '';
1692: my $filecontents=&Apache::lonnet::getfile($file);
1693: if ($filecontents eq -1) {
1694: my $start_page=&Apache::loncommon::start_page('File Error');
1695: my $end_page=&Apache::loncommon::end_page();
1696: my $fnf=&mt('File not found');
1697: $result=(<<ENDNOTFOUND);
1698: $start_page
1699: <b>$fnf: $file</b>
1700: $end_page
1701: ENDNOTFOUND
1702: $filecontents='';
1703: if ($env{'request.state'} ne 'published') {
1704: if ($filetype eq 'sty') {
1705: $filecontents=&createnewsty();
1706: } else {
1707: $filecontents=&createnewhtml();
1708: }
1709: $env{'form.editmode'}='Edit'; #force edit mode
1710: }
1711: } else {
1712: unless ($env{'request.state'} eq 'published') {
1713: if ($filecontents=~/BEGIN LON-CAPA Internal/) {
1714: &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.'));
1715: }
1716: #
1717: # we are in construction space, see if edit mode forced
1718: &Apache::loncommon::get_unprocessed_cgi($ENV{'QUERY_STRING'},
1719: ['editmode']);
1720: }
1721: if (!$env{'form.editmode'} || $env{'form.viewmode'} || $env{'form.discardview'}) {
1722: &Apache::structuretags::reset_problem_globals();
1723: $result = &Apache::lonxml::xmlparse($request,$target,$filecontents,
1724: '',%mystyle);
1725: # .html files may contain <problem> or <Task> need to clean
1726: # up if it did
1727: &Apache::structuretags::reset_problem_globals();
1728: &Apache::lonhomework::finished_parsing();
1729: &Apache::loncommon::get_unprocessed_cgi($ENV{'QUERY_STRING'},
1730: ['rawmode']);
1731: if ($env{'form.rawmode'}) { $result = $filecontents; }
1732: if ($filetype eq 'sty') {
1733: my $controls =
1734: ($env{'request.state'} eq 'construct') ? &Apache::londefdef::edit_controls()
1735: : '';
1736: my %options = ('bgcolor' => '#FFFFFF');
1737: $result =
1738: &Apache::loncommon::start_page(undef,undef,\%options).
1739: $controls.
1740: $result.
1741: &Apache::loncommon::end_page();
1742: }
1743: }
1744: }
1745:
1746: #
1747: # Edit action? Insert editing commands
1748: #
1749: unless ($env{'request.state'} eq 'published') {
1750: if ($env{'form.editmode'} && (!($env{'form.viewmode'})) && (!($env{'form.discardview'})))
1751: {
1752: my $displayfile=$request->uri;
1753: $displayfile=~s/^\/[^\/]*//;
1754:
1755: my ($edit_info, $add_to_onload, $add_to_onresize)=
1756: &inserteditinfo($filecontents,$filetype,$displayfile);
1757:
1758: my %options =
1759: ('add_entries' =>
1760: {'onresize' => $add_to_onresize,
1761: 'onload' => $add_to_onload, });
1762:
1763: if ($env{'environment.remote'} ne 'off') {
1764: $options{'bgcolor'} = '#FFFFFF';
1765: $options{'only_body'} = 1;
1766: }
1767: my $js =
1768: &Apache::edit::js_change_detection().
1769: &Apache::loncommon::resize_textarea_js();
1770: my $start_page = &Apache::loncommon::start_page(undef,$js,
1771: \%options);
1772: $result=$start_page.
1773: &Apache::lonxml::message_location().
1774: $edit_info.
1775: &Apache::loncommon::end_page();
1776: }
1777: }
1778: if ($filetype eq 'html') { &writeallows($request->uri); }
1779:
1780: &Apache::lonxml::add_messages(\$result);
1781: $request->print($result);
1782:
1783: return OK;
1784: }
1785:
1786: sub display_title {
1787: my $result;
1788: if ($env{'request.state'} eq 'construct') {
1789: my $title=&Apache::lonnet::gettitle();
1790: if (!defined($title) || $title eq '') {
1791: $title = $env{'request.filename'};
1792: $title = substr($title, rindex($title, '/') + 1);
1793: }
1794: $result = "<script type='text/javascript'>top.document.title = '$title - LON-CAPA "
1795: .&mt('Construction Space')."';</script>";
1796: }
1797: return $result;
1798: }
1799:
1800: sub debug {
1801: if ($Apache::lonxml::debug eq "1") {
1802: $|=1;
1803: my $request=$Apache::lonxml::request;
1804: if (!$request) {
1805: eval { $request=Apache->request; };
1806: }
1807: if (!$request) {
1808: eval { $request=Apache2::RequestUtil->request; };
1809: }
1810: $request->print('<font size="-2"><pre>DEBUG:'.&HTML::Entities::encode($_[0],'<>&"')."</pre></font>\n");
1811: #&Apache::lonnet::logthis($_[0]);
1812: }
1813: }
1814:
1815: sub show_error_warn_msg {
1816: if ($env{'request.filename'} eq '/home/httpd/html/res/lib/templates/simpleproblem.problem' &&
1817: &Apache::lonnet::allowed('mdc',$env{'request.course.id'})) {
1818: return 1;
1819: }
1820: return (($Apache::lonxml::debug eq 1) ||
1821: ($env{'request.state'} eq 'construct') ||
1822: ($Apache::lonhomework::browse eq 'F'
1823: &&
1824: $env{'form.show_errors'} eq 'on'));
1825: }
1826:
1827: sub error {
1828: my @errors = @_;
1829:
1830: $errorcount++;
1831:
1832: $Apache::lonxml::internal_error=1;
1833:
1834: if (defined($Apache::inputtags::part)) {
1835: if ( @Apache::inputtags::response ) {
1836: push(@errors,
1837: &mt("This error occurred while processing response [_1] in part [_2]",
1838: $Apache::inputtags::response[-1],
1839: $Apache::inputtags::part));
1840: } else {
1841: push(@errors,
1842: &mt("This error occurred while processing part [_1]",
1843: $Apache::inputtags::part));
1844: }
1845: }
1846:
1847: if ( &show_error_warn_msg() ) {
1848: # If printing in construction space, put the error inside <pre></pre>
1849: push(@Apache::lonxml::error_messages,
1850: $Apache::lonxml::warnings_error_header
1851: .'<div class="LC_error">'
1852: .'<b>'.&mt('ERROR:').' </b>'.join("<br />\n",@errors)
1853: ."</div>\n");
1854: $Apache::lonxml::warnings_error_header='';
1855: } else {
1856: my $errormsg;
1857: my ($symb)=&Apache::lonnet::symbread();
1858: if ( !$symb ) {
1859: #public or browsers
1860: $errormsg=&mt("An error occurred while processing this resource. The author has been notified.");
1861: }
1862: my $host=$Apache::lonnet::perlvar{'lonHostID'};
1863: push(@errors,
1864: &mt("The error occurred on host [_1]",
1865: "<tt>$host</tt>"));
1866:
1867: my $msg = join('<br />', @errors);
1868:
1869: #notify author
1870: &Apache::lonmsg::author_res_msg($env{'request.filename'},$msg);
1871: #notify course
1872: if ( $symb && $env{'request.course.id'} ) {
1873: my $cnum=$env{'course.'.$env{'request.course.id'}.'.num'};
1874: my $cdom=$env{'course.'.$env{'request.course.id'}.'.domain'};
1875: my (undef,%users)=&Apache::lonmsg::decide_receiver(undef,0,1,1,1);
1876: my $declutter=&Apache::lonnet::declutter($env{'request.filename'});
1877: my $baseurl = &Apache::lonnet::clutter($declutter);
1878: my @userlist;
1879: foreach (keys %users) {
1880: my ($user,$domain) = split(/:/, $_);
1881: push(@userlist,"$user\@$domain");
1882: my $key=$declutter.'_'.$user.'_'.$domain;
1883: my %lastnotified=&Apache::lonnet::get('nohist_xmlerrornotifications',
1884: [$key],
1885: $cdom,$cnum);
1886: my $now=time;
1887: if ($now-$lastnotified{$key}>86400) {
1888: my $title = &Apache::lonnet::gettitle($symb);
1889: my $sentmessage;
1890: &Apache::lonmsg::user_normal_msg($user,$domain,
1891: "Error [$title]",$msg,'',$baseurl,'','',
1892: \$sentmessage,$symb,$title,1);
1893: &Apache::lonnet::put('nohist_xmlerrornotifications',
1894: {$key => $now},
1895: $cdom,$cnum);
1896: }
1897: }
1898: if ($env{'request.role.adv'}) {
1899: $errormsg=&mt("An error occurred while processing this resource. The course personnel ([_1]) and the author have been notified.",join(', ',@userlist));
1900: } else {
1901: $errormsg=&mt("An error occurred while processing this resource. The instructor has been notified.");
1902: }
1903: }
1904: push(@Apache::lonxml::error_messages,"<b>$errormsg</b> <br />");
1905: }
1906: }
1907:
1908: sub warning {
1909: $warningcount++;
1910:
1911: if ($env{'form.grade_target'} ne 'tex') {
1912: if ( &show_error_warn_msg() ) {
1913: push(@Apache::lonxml::warning_messages,
1914: $Apache::lonxml::warnings_error_header
1915: .'<div class="LC_warning">'
1916: .&mt('[_1]W[_2]ARNING','<b>','</b>')."<b>:</b> ".join('<br />',@_)
1917: ."</div>\n"
1918: );
1919: $Apache::lonxml::warnings_error_header='';
1920: }
1921: }
1922: }
1923:
1924: sub info {
1925: if ($env{'form.grade_target'} ne 'tex'
1926: && $env{'request.state'} eq 'construct') {
1927: push(@Apache::lonxml::info_messages,join('<br />',@_)."<br />\n");
1928: }
1929: }
1930:
1931: sub message_location {
1932: return '__LONCAPA_INTERNAL_MESSAGE_LOCATION__';
1933: }
1934:
1935: sub add_messages {
1936: my ($msg)=@_;
1937: my $result=join(' ',
1938: @Apache::lonxml::info_messages,
1939: @Apache::lonxml::error_messages,
1940: @Apache::lonxml::warning_messages);
1941: undef(@Apache::lonxml::info_messages);
1942: undef(@Apache::lonxml::error_messages);
1943: undef(@Apache::lonxml::warning_messages);
1944: $$msg=~s/__LONCAPA_INTERNAL_MESSAGE_LOCATION__/$result/;
1945: $$msg=~s/__LONCAPA_INTERNAL_MESSAGE_LOCATION__//g;
1946: }
1947:
1948: sub get_param {
1949: my ($param,$parstack,$safeeval,$context,$case_insensitive) = @_;
1950: if ( ! $context ) { $context = -1; }
1951: my $args ='';
1952: if ( $#$parstack > (-2-$context) ) { $args=$$parstack[$context]; }
1953: if ( ! $Apache::lonxml::usestyle ) {
1954: $args=$Apache::lonxml::style_values.$args;
1955: }
1956: if ( ! $args ) { return undef; }
1957: if ( $case_insensitive ) {
1958: if ($args =~ s/(my (?:.*))(\$\Q$param\E[,\)])/$1.lc($2)/ei) {
1959: return &Apache::run::run("{$args;".'return $'.$param.'}',
1960: $safeeval); #'
1961: } else {
1962: return undef;
1963: }
1964: } else {
1965: if ( $args =~ /my .*\$\Q$param\E[,\)]/ ) {
1966: return &Apache::run::run("{$args;".'return $'.$param.'}',
1967: $safeeval); #'
1968: } else {
1969: return undef;
1970: }
1971: }
1972: }
1973:
1974: sub get_param_var {
1975: my ($param,$parstack,$safeeval,$context,$case_insensitive) = @_;
1976: if ( ! $context ) { $context = -1; }
1977: my $args ='';
1978: if ( $#$parstack > (-2-$context) ) { $args=$$parstack[$context]; }
1979: if ( ! $Apache::lonxml::usestyle ) {
1980: $args=$Apache::lonxml::style_values.$args;
1981: }
1982: &Apache::lonxml::debug("Args are $args param is $param");
1983: if ($case_insensitive) {
1984: if (! ($args=~s/(my (?:.*))(\$\Q$param\E[,\)])/$1.lc($2)/ei)) {
1985: return undef;
1986: }
1987: } elsif ( $args !~ /my .*\$\Q$param\E[,\)]/ ) { return undef; }
1988: my $value=&Apache::run::run("{$args;".'return $'.$param.'}',$safeeval); #'
1989: &Apache::lonxml::debug("first run is $value");
1990: if ($value =~ /^[\$\@\%][a-zA-Z_]\w*$/) {
1991: &Apache::lonxml::debug("doing second");
1992: my @result=&Apache::run::run("return $value",$safeeval,1);
1993: if (!defined($result[0])) {
1994: return $value
1995: } else {
1996: if (wantarray) { return @result; } else { return $result[0]; }
1997: }
1998: } else {
1999: return $value;
2000: }
2001: }
2002:
2003: sub register_insert_xml {
2004: my $parser = HTML::LCParser->new($Apache::lonnet::perlvar{'lonTabDir'}
2005: .'/insertlist.xml');
2006: my ($tagnum,$in_help)=(0,0);
2007: my @alltags;
2008: my $tag;
2009: while (my $token = $parser->get_token()) {
2010: if ($token->[0] eq 'S') {
2011: my $key;
2012: if ($token->[1] eq 'tag') {
2013: $tag = $token->[2]{'name'};
2014: $insertlist{"$tagnum.tag"} = $tag;
2015: $insertlist{"$tag.num"} = $tagnum;
2016: push(@alltags,$tag);
2017: } elsif ($in_help && $token->[1] eq 'file') {
2018: $key = $tag.'.helpfile';
2019: } elsif ($in_help && $token->[1] eq 'description') {
2020: $key = $tag.'.helpdesc';
2021: } elsif ($token->[1] eq 'description' ||
2022: $token->[1] eq 'color' ||
2023: $token->[1] eq 'show' ) {
2024: $key = $tag.'.'.$token->[1];
2025: } elsif ($token->[1] eq 'insert_sub') {
2026: $key = $tag.'.function';
2027: } elsif ($token->[1] eq 'help') {
2028: $in_help=1;
2029: } elsif ($token->[1] eq 'allow') {
2030: $key = $tag.'.allow';
2031: }
2032: if (defined($key)) {
2033: $insertlist{$key} = $parser->get_text();
2034: $insertlist{$key} =~ s/(^\s*|\s*$ )//gx;
2035: }
2036: } elsif ($token->[0] eq 'E') {
2037: if ($token->[1] eq 'tag') {
2038: undef($tag);
2039: $tagnum++;
2040: } elsif ($token->[1] eq 'help') {
2041: undef($in_help);
2042: }
2043: }
2044: }
2045:
2046: # parse the allows and ignore tags set to <show>no</show>
2047: foreach my $tag (@alltags) {
2048: next if (!exists($insertlist{"$tag.allow"}));
2049: my $allow = $insertlist{"$tag.allow"};
2050: foreach my $element (split(',',$allow)) {
2051: $element =~ s/(^\s*|\s*$ )//gx;
2052: if (!exists($insertlist{"$element.show"})
2053: || $insertlist{"$element.show"} ne 'no') {
2054: push(@{ $insertlist{$tag.'.which'} },$element);
2055: }
2056: }
2057: }
2058: }
2059:
2060: sub register_insert {
2061: return ®ister_insert_xml(@_);
2062: # &dump_insertlist('2');
2063: }
2064:
2065: sub dump_insertlist {
2066: my ($ext) = @_;
2067: open(XML,">/tmp/insertlist.xml.$ext");
2068: print XML ("<insertlist>");
2069: my $i=0;
2070:
2071: while (exists($insertlist{"$i.tag"})) {
2072: my $tag = $insertlist{"$i.tag"};
2073: print XML ("
2074: \t<tag name=\"$tag\">");
2075: if (defined($insertlist{"$tag.description"})) {
2076: print XML ("
2077: \t\t<description>".$insertlist{"$tag.description"}."</description>");
2078: }
2079: if (defined($insertlist{"$tag.color"})) {
2080: print XML ("
2081: \t\t<color>".$insertlist{"$tag.color"}."</color>");
2082: }
2083: if (defined($insertlist{"$tag.function"})) {
2084: print XML ("
2085: \t\t<insert_sub>".$insertlist{"$tag.function"}."</insert_sub>");
2086: }
2087: if (defined($insertlist{"$tag.show"})
2088: && $insertlist{"$tag.show"} ne 'yes') {
2089: print XML ("
2090: \t\t<show>".$insertlist{"$tag.show"}."</show>");
2091: }
2092: if (defined($insertlist{"$tag.helpfile"})) {
2093: print XML ("
2094: \t\t<help>
2095: \t\t\t<file>".$insertlist{"$tag.helpfile"}."</file>");
2096: if ($insertlist{"$tag.helpdesc"} ne '') {
2097: print XML ("
2098: \t\t\t<description>".$insertlist{"$tag.helpdesc"}."</description>");
2099: }
2100: print XML ("
2101: \t\t</help>");
2102: }
2103: if (defined($insertlist{"$tag.which"})) {
2104: print XML ("
2105: \t\t<allow>".join(',',sort(@{ $insertlist{"$tag.which"} }))."</allow>");
2106: }
2107: print XML ("
2108: \t</tag>");
2109: $i++;
2110: }
2111: print XML ("\n</insertlist>\n");
2112: close(XML);
2113: }
2114:
2115: sub description {
2116: my ($token)=@_;
2117: my $tag = &get_tag($token);
2118: return $insertlist{$tag.'.description'};
2119: }
2120:
2121: # Returns a list containing the help file, and the description
2122: sub helpinfo {
2123: my ($token)=@_;
2124: my $tag = &get_tag($token);
2125: return ($insertlist{$tag.'.helpfile'}, $insertlist{$tag.'.helpdesc'});
2126: }
2127:
2128: sub get_tag {
2129: my ($token)=@_;
2130: my $tagnum;
2131: my $tag=$token->[1];
2132: foreach my $namespace (reverse(@Apache::lonxml::namespace)) {
2133: my $testtag = $namespace.'::'.$tag;
2134: $tagnum = $insertlist{"$testtag.num"};
2135: last if (defined($tagnum));
2136: }
2137: if (!defined($tagnum)) {
2138: $tagnum = $Apache::lonxml::insertlist{"$tag.num"};
2139: }
2140: return $insertlist{"$tagnum.tag"};
2141: }
2142:
2143: 1;
2144: __END__
2145:
2146:
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