1: # The LearningOnline Network with CAPA
2: # XML Parser Module
3: #
4: # $Id: lonxml.pm,v 1.470 2007/12/05 14:52:15 albertel 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: $safeeval,\%style_for_target,1);
362:
363: if (@stack) {
364: &warning("At end of file some tags were still left unclosed, ".
365: '<tt><'.join('></tt>, <tt><',reverse(@stack)).
366: '></tt>');
367: }
368: if ($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: return "$errorcount:$warningcount";
383: }
384: return $finaloutput;
385: }
386:
387: sub latex_special_symbols {
388: my ($string,$where)=@_;
389: #
390: # If e.g. in verbatim mode, then don't substitute.
391: # but return original string.
392: #
393: if (!($Apache::lonxml::substitute_LaTeX_symbols)) {
394: return $string;
395: }
396: if ($where eq 'header') {
397: $string =~ s/\\/\$\\backslash\$/g; # \ -> $\backslash$ per LaTex line by line pg 10.
398: $string =~ s/(\$|%|\{|\})/\\$1/g;
399: $string=&Apache::lonprintout::character_chart($string);
400: # any & or # leftover should be safe to just escape
401: $string=~s/([^\\])\&/$1\\\&/g;
402: $string=~s/([^\\])\#/$1\\\#/g;
403: $string =~ s/_/\\_/g; # _ -> \_
404: $string =~ s/\^/\\\^{}/g; # ^ -> \^{}
405: } else {
406: $string=~s/\\/\\ensuremath{\\backslash}/g;
407: $string=~s/\\\%|\%/\\\%/g;
408: $string=~s/\\{|{/\\{/g;
409: $string=~s/\\}|}/\\}/g;
410: $string=~s/\\ensuremath\\{\\backslash\\}/\\ensuremath{\\backslash}/g;
411: $string=~s/\\\$|\$/\\\$/g;
412: $string=~s/\\\_|\_/\\\_/g;
413: $string=~s/([^\\]|^)(\~|\^)/$1\\$2\\strut /g;
414: $string=~s/(>|<)/\\ensuremath\{$1\}/g; #more or less
415: $string=&Apache::lonprintout::character_chart($string);
416: # any & or # leftover should be safe to just escape
417: $string=~s/\\\&|\&/\\\&/g;
418: $string=~s/\\\#|\#/\\\#/g;
419: $string=~s/\|/\$\\mid\$/g;
420: #single { or } How to escape?
421: }
422: return $string;
423: }
424:
425: sub inner_xmlparse {
426: my ($target,$stack,$parstack,$pars,$safeeval,$style_for_target,$start)=@_;
427: my $finaloutput = '';
428: my $result;
429: my $token;
430: my $dontpop=0;
431: my $startredirection = $Apache::lonxml::redirection;
432: while ( $#$pars > -1 ) {
433: while ($token = $$pars['-1']->get_token) {
434: if (($token->[0] eq 'T') || ($token->[0] eq 'C') ) {
435: if ($metamode<1) {
436: my $text=$token->[1];
437: if ($token->[0] eq 'C' && $target eq 'tex') {
438: $text = '';
439: # $text = '%'.$text."\n";
440: }
441: $result.=$text;
442: }
443: } elsif (($token->[0] eq 'D')) {
444: if ($metamode<1 && $target eq 'web') {
445: my $text=$token->[1];
446: $result.=$text;
447: }
448: } elsif ($token->[0] eq 'PI') {
449: if ($metamode<1 && $target eq 'web') {
450: $result=$token->[2];
451: }
452: } elsif ($token->[0] eq 'S') {
453: # add tag to stack
454: push (@$stack,$token->[1]);
455: # add parameters list to another stack
456: push (@$parstack,&parstring($token));
457: &increasedepth($token);
458: if ($Apache::lonxml::usestyle &&
459: exists($$style_for_target{$token->[1]})) {
460: $Apache::lonxml::usestyle=0;
461: my $string=$$style_for_target{$token->[1]}.
462: '<LONCAPA_INTERNAL_TURN_STYLE_ON />';
463: &Apache::lonxml::newparser($pars,\$string);
464: $Apache::lonxml::style_values=$$parstack[-1];
465: $Apache::lonxml::style_end_values=$$parstack[-1];
466: } else {
467: $result = &callsub("start_$token->[1]", $target, $token, $stack,
468: $parstack, $pars, $safeeval, $style_for_target);
469: }
470: } elsif ($token->[0] eq 'E') {
471: if ($Apache::lonxml::usestyle &&
472: exists($$style_for_target{'/'."$token->[1]"})) {
473: $Apache::lonxml::usestyle=0;
474: my $string=$$style_for_target{'/'.$token->[1]}.
475: '<LONCAPA_INTERNAL_TURN_STYLE_ON end="'.$token->[1].'" />';
476: &Apache::lonxml::newparser($pars,\$string);
477: $Apache::lonxml::style_values=$Apache::lonxml::style_end_values;
478: $Apache::lonxml::style_end_values='';
479: $dontpop=1;
480: } else {
481: #clear out any tags that didn't end
482: while ($token->[1] ne $$stack['-1'] && ($#$stack > -1)) {
483: my $lasttag=$$stack[-1];
484: if ($token->[1] =~ /^\Q$lasttag\E$/i) {
485: &Apache::lonxml::warning('Using tag </'.$token->[1].'> on line '.$token->[3].' as end tag to <'.$$stack[-1].'>');
486: last;
487: } else {
488: &Apache::lonxml::warning('Found tag </'.$token->[1].'> on line '.$token->[3].' when looking for </'.$$stack[-1].'> in file');
489: &end_tag($stack,$parstack,$token);
490: }
491: }
492: $result = &callsub("end_$token->[1]", $target, $token, $stack,
493: $parstack, $pars,$safeeval, $style_for_target);
494: }
495: } else {
496: &Apache::lonxml::error("Unknown token event :$token->[0]:$token->[1]:");
497: }
498: #evaluate variable refs in result
499: if ($Apache::lonxml::post_evaluate &&$result ne "") {
500: my $extras;
501: if (!$Apache::lonxml::usestyle) {
502: $extras=$Apache::lonxml::style_values;
503: }
504: if ( $#$parstack > -1 ) {
505: $result=&Apache::run::evaluate($result,$safeeval,$extras.$$parstack[-1]);
506: } else {
507: $result= &Apache::run::evaluate($result,$safeeval,$extras);
508: }
509: }
510: $Apache::lonxml::post_evaluate=1;
511:
512: if (($token->[0] eq 'T') || ($token->[0] eq 'C') || ($token->[0] eq 'D') ) {
513: #Style file definitions should be correct
514: if ($target eq 'tex' && ($Apache::lonxml::usestyle)) {
515: $result=&latex_special_symbols($result);
516: }
517: }
518:
519: if ($Apache::lonxml::redirection) {
520: $Apache::lonxml::outputstack['-1'] .= $result;
521: } else {
522: $finaloutput.=$result;
523: }
524: $result = '';
525:
526: if ($token->[0] eq 'E' && !$dontpop) {
527: &end_tag($stack,$parstack,$token);
528: }
529: $dontpop=0;
530: }
531: if ($#$pars > -1) {
532: pop @$pars;
533: pop @Apache::lonxml::pwd;
534: }
535: }
536:
537: # if ($target eq 'meta') {
538: # $finaloutput.=&endredirection;
539: # }
540:
541: if ( $start && $target eq 'grade') { &endredirection(); }
542: if ( $Apache::lonxml::redirection > $startredirection) {
543: while ($Apache::lonxml::redirection > $startredirection) {
544: $finaloutput .= &endredirection();
545: }
546: }
547: if (($ENV{'QUERY_STRING'}) && ($target eq 'web')) {
548: $finaloutput=&afterburn($finaloutput);
549: }
550: return $finaloutput;
551: }
552:
553: ##
554: ## Looks to see if there is a subroutine defined for this tag. If so, call it,
555: ## otherwise do not call it as we do not know what it is.
556: ##
557: sub callsub {
558: my ($sub,$target,$token,$tagstack,$parstack,$parser,$safeeval,$style)=@_;
559: my $currentstring='';
560: my $nodefault;
561: {
562: my $sub1;
563: no strict 'refs';
564: my $tag=$token->[1];
565: # get utterly rid of extended html tags
566: if ($tag=~/^x\-/i) { return ''; }
567: my $space=$Apache::lonxml::alltags{$tag}[-1];
568: if (!$space) {
569: $tag=~tr/A-Z/a-z/;
570: $sub=~tr/A-Z/a-z/;
571: $space=$Apache::lonxml::alltags{$tag}[-1]
572: }
573:
574: my $deleted=0;
575: if (($token->[0] eq 'S') && ($target eq 'modified')) {
576: $deleted=&Apache::edit::handle_delete($space,$target,$token,$tagstack,
577: $parstack,$parser,$safeeval,
578: $style);
579: }
580: if (!$deleted) {
581: if ($space) {
582: #&Apache::lonxml::debug("Calling sub $sub in $space $metamode");
583: $sub1="$space\:\:$sub";
584: ($currentstring,$nodefault) = &$sub1($target,$token,$tagstack,
585: $parstack,$parser,$safeeval,
586: $style);
587: } else {
588: if ($target eq 'tex') {
589: # throw away tag name
590: return '';
591: }
592: #&Apache::lonxml::debug("NOT Calling sub $sub in $space $metamode");
593: if ($metamode <1) {
594: if (defined($token->[4]) && ($metamode < 1)) {
595: $currentstring = $token->[4];
596: } else {
597: $currentstring = $token->[2];
598: }
599: }
600: }
601: # &Apache::lonxml::debug("nodefalt:$nodefault:");
602: if ($currentstring eq '' && $nodefault eq '') {
603: if ($target eq 'edit') {
604: #&Apache::lonxml::debug("doing default edit for $token->[1]");
605: if ($token->[0] eq 'S') {
606: $currentstring = &Apache::edit::tag_start($target,$token);
607: } elsif ($token->[0] eq 'E') {
608: $currentstring = &Apache::edit::tag_end($target,$token);
609: }
610: }
611: }
612: if ($target eq 'modified' && $nodefault eq '') {
613: if ($currentstring eq '') {
614: if ($token->[0] eq 'S') {
615: $currentstring = $token->[4];
616: } elsif ($token->[0] eq 'E') {
617: $currentstring = $token->[2];
618: } else {
619: $currentstring = $token->[2];
620: }
621: }
622: if ($token->[0] eq 'S') {
623: $currentstring.=&Apache::edit::handle_insert();
624: } elsif ($token->[0] eq 'E') {
625: $currentstring.=&Apache::edit::handle_insertafter($token->[1]);
626: }
627: }
628: }
629: use strict 'refs';
630: }
631: return $currentstring;
632: }
633:
634: {
635: my %state;
636:
637: sub init_state {
638: undef(%state);
639: }
640:
641: sub set_state {
642: my ($key,$value) = @_;
643: $state{$key} = $value;
644: return $value;
645: }
646: sub get_state {
647: my ($key) = @_;
648: return $state{$key};
649: }
650: }
651:
652: sub setup_globals {
653: my ($request,$target)=@_;
654: $Apache::lonxml::request=$request;
655: $errorcount=0;
656: $warningcount=0;
657: $Apache::lonxml::default_homework_loaded=0;
658: $Apache::lonxml::usestyle=1;
659: &init_counter();
660: &clear_bubble_lines_for_part();
661: &init_state();
662: &set_state('target',$target);
663: @Apache::lonxml::pwd=();
664: @Apache::lonxml::extlinks=();
665: @script_var_displays=();
666: @Apache::lonxml::ssi_info=();
667: $Apache::lonxml::post_evaluate=1;
668: $Apache::lonxml::warnings_error_header='';
669: $Apache::lonxml::substitute_LaTeX_symbols = 1;
670: if ($target eq 'meta') {
671: $Apache::lonxml::redirection = 0;
672: $Apache::lonxml::metamode = 1;
673: $Apache::lonxml::evaluate = 1;
674: $Apache::lonxml::import = 0;
675: } elsif ($target eq 'answer') {
676: $Apache::lonxml::redirection = 0;
677: $Apache::lonxml::metamode = 1;
678: $Apache::lonxml::evaluate = 1;
679: $Apache::lonxml::import = 1;
680: } elsif ($target eq 'grade') {
681: &startredirection(); #ended in inner_xmlparse on exit
682: $Apache::lonxml::metamode = 0;
683: $Apache::lonxml::evaluate = 1;
684: $Apache::lonxml::import = 1;
685: } elsif ($target eq 'modified') {
686: $Apache::lonxml::redirection = 0;
687: $Apache::lonxml::metamode = 0;
688: $Apache::lonxml::evaluate = 0;
689: $Apache::lonxml::import = 0;
690: } elsif ($target eq 'edit') {
691: $Apache::lonxml::redirection = 0;
692: $Apache::lonxml::metamode = 0;
693: $Apache::lonxml::evaluate = 0;
694: $Apache::lonxml::import = 0;
695: } elsif ($target eq 'analyze') {
696: $Apache::lonxml::redirection = 0;
697: $Apache::lonxml::metamode = 0;
698: $Apache::lonxml::evaluate = 1;
699: $Apache::lonxml::import = 1;
700: } else {
701: $Apache::lonxml::redirection = 0;
702: $Apache::lonxml::metamode = 0;
703: $Apache::lonxml::evaluate = 1;
704: $Apache::lonxml::import = 1;
705: }
706: }
707:
708: sub init_safespace {
709: my ($target,$safeeval,$safehole,$safeinit) = @_;
710: $safeeval->deny_only(':dangerous');
711: $safeeval->reval('use Math::Complex;');
712: $safeeval->permit_only(":default");
713: $safeeval->permit("entereval");
714: $safeeval->permit(":base_math");
715: $safeeval->permit("sort");
716: $safeeval->permit("time");
717: $safeeval->deny("rand");
718: $safeeval->deny("srand");
719: $safeeval->deny(":base_io");
720: $safehole->wrap(\&Apache::scripttag::xmlparse,$safeeval,'&xmlparse');
721: $safehole->wrap(\&Apache::outputtags::multipart,$safeeval,'&multipart');
722: $safehole->wrap(\&Apache::lonnet::EXT,$safeeval,'&EXT');
723: $safehole->wrap(\&Apache::chemresponse::chem_standard_order,$safeeval,
724: '&chem_standard_order');
725: $safehole->wrap(\&Apache::response::check_status,$safeeval,'&check_status');
726:
727: $safehole->wrap(\&Apache::lonmaxima::maxima_eval,$safeeval,'&maxima_eval');
728: $safehole->wrap(\&Apache::lonmaxima::maxima_check,$safeeval,'&maxima_check');
729: $safehole->wrap(\&Apache::lonmaxima::maxima_cas_formula_fix,$safeeval,
730: '&maxima_cas_formula_fix');
731:
732: $safehole->wrap(\&Apache::caparesponse::capa_formula_fix,$safeeval,
733: '&capa_formula_fix');
734:
735: $safehole->wrap(\&Math::Cephes::asin,$safeeval,'&asin');
736: $safehole->wrap(\&Math::Cephes::acos,$safeeval,'&acos');
737: $safehole->wrap(\&Math::Cephes::atan,$safeeval,'&atan');
738: $safehole->wrap(\&Math::Cephes::sinh,$safeeval,'&sinh');
739: $safehole->wrap(\&Math::Cephes::cosh,$safeeval,'&cosh');
740: $safehole->wrap(\&Math::Cephes::tanh,$safeeval,'&tanh');
741: $safehole->wrap(\&Math::Cephes::asinh,$safeeval,'&asinh');
742: $safehole->wrap(\&Math::Cephes::acosh,$safeeval,'&acosh');
743: $safehole->wrap(\&Math::Cephes::atanh,$safeeval,'&atanh');
744: $safehole->wrap(\&Math::Cephes::erf,$safeeval,'&erf');
745: $safehole->wrap(\&Math::Cephes::erfc,$safeeval,'&erfc');
746: $safehole->wrap(\&Math::Cephes::j0,$safeeval,'&j0');
747: $safehole->wrap(\&Math::Cephes::j1,$safeeval,'&j1');
748: $safehole->wrap(\&Math::Cephes::jn,$safeeval,'&jn');
749: $safehole->wrap(\&Math::Cephes::jv,$safeeval,'&jv');
750: $safehole->wrap(\&Math::Cephes::y0,$safeeval,'&y0');
751: $safehole->wrap(\&Math::Cephes::y1,$safeeval,'&y1');
752: $safehole->wrap(\&Math::Cephes::yn,$safeeval,'&yn');
753: $safehole->wrap(\&Math::Cephes::yv,$safeeval,'&yv');
754:
755: $safehole->wrap(\&Math::Cephes::bdtr ,$safeeval,'&bdtr' );
756: $safehole->wrap(\&Math::Cephes::bdtrc ,$safeeval,'&bdtrc' );
757: $safehole->wrap(\&Math::Cephes::bdtri ,$safeeval,'&bdtri' );
758: $safehole->wrap(\&Math::Cephes::btdtr ,$safeeval,'&btdtr' );
759: $safehole->wrap(\&Math::Cephes::chdtr ,$safeeval,'&chdtr' );
760: $safehole->wrap(\&Math::Cephes::chdtrc,$safeeval,'&chdtrc');
761: $safehole->wrap(\&Math::Cephes::chdtri,$safeeval,'&chdtri');
762: $safehole->wrap(\&Math::Cephes::fdtr ,$safeeval,'&fdtr' );
763: $safehole->wrap(\&Math::Cephes::fdtrc ,$safeeval,'&fdtrc' );
764: $safehole->wrap(\&Math::Cephes::fdtri ,$safeeval,'&fdtri' );
765: $safehole->wrap(\&Math::Cephes::gdtr ,$safeeval,'&gdtr' );
766: $safehole->wrap(\&Math::Cephes::gdtrc ,$safeeval,'&gdtrc' );
767: $safehole->wrap(\&Math::Cephes::nbdtr ,$safeeval,'&nbdtr' );
768: $safehole->wrap(\&Math::Cephes::nbdtrc,$safeeval,'&nbdtrc');
769: $safehole->wrap(\&Math::Cephes::nbdtri,$safeeval,'&nbdtri');
770: $safehole->wrap(\&Math::Cephes::ndtr ,$safeeval,'&ndtr' );
771: $safehole->wrap(\&Math::Cephes::ndtri ,$safeeval,'&ndtri' );
772: $safehole->wrap(\&Math::Cephes::pdtr ,$safeeval,'&pdtr' );
773: $safehole->wrap(\&Math::Cephes::pdtrc ,$safeeval,'&pdtrc' );
774: $safehole->wrap(\&Math::Cephes::pdtri ,$safeeval,'&pdtri' );
775: $safehole->wrap(\&Math::Cephes::stdtr ,$safeeval,'&stdtr' );
776: $safehole->wrap(\&Math::Cephes::stdtri,$safeeval,'&stdtri');
777:
778: $safehole->wrap(\&Math::Cephes::Matrix::mat,$safeeval,'&mat');
779: $safehole->wrap(\&Math::Cephes::Matrix::new,$safeeval,
780: '&Math::Cephes::Matrix::new');
781: $safehole->wrap(\&Math::Cephes::Matrix::coef,$safeeval,
782: '&Math::Cephes::Matrix::coef');
783: $safehole->wrap(\&Math::Cephes::Matrix::clr,$safeeval,
784: '&Math::Cephes::Matrix::clr');
785: $safehole->wrap(\&Math::Cephes::Matrix::add,$safeeval,
786: '&Math::Cephes::Matrix::add');
787: $safehole->wrap(\&Math::Cephes::Matrix::sub,$safeeval,
788: '&Math::Cephes::Matrix::sub');
789: $safehole->wrap(\&Math::Cephes::Matrix::mul,$safeeval,
790: '&Math::Cephes::Matrix::mul');
791: $safehole->wrap(\&Math::Cephes::Matrix::div,$safeeval,
792: '&Math::Cephes::Matrix::div');
793: $safehole->wrap(\&Math::Cephes::Matrix::inv,$safeeval,
794: '&Math::Cephes::Matrix::inv');
795: $safehole->wrap(\&Math::Cephes::Matrix::transp,$safeeval,
796: '&Math::Cephes::Matrix::transp');
797: $safehole->wrap(\&Math::Cephes::Matrix::simq,$safeeval,
798: '&Math::Cephes::Matrix::simq');
799: $safehole->wrap(\&Math::Cephes::Matrix::mat_to_vec,$safeeval,
800: '&Math::Cephes::Matrix::mat_to_vec');
801: $safehole->wrap(\&Math::Cephes::Matrix::vec_to_mat,$safeeval,
802: '&Math::Cephes::Matrix::vec_to_mat');
803: $safehole->wrap(\&Math::Cephes::Matrix::check,$safeeval,
804: '&Math::Cephes::Matrix::check');
805: $safehole->wrap(\&Math::Cephes::Matrix::check,$safeeval,
806: '&Math::Cephes::Matrix::check');
807:
808: # $safehole->wrap(\&Math::Cephes::new_fract,$safeeval,'&new_fract');
809: # $safehole->wrap(\&Math::Cephes::radd,$safeeval,'&radd');
810: # $safehole->wrap(\&Math::Cephes::rsub,$safeeval,'&rsub');
811: # $safehole->wrap(\&Math::Cephes::rmul,$safeeval,'&rmul');
812: # $safehole->wrap(\&Math::Cephes::rdiv,$safeeval,'&rdiv');
813: # $safehole->wrap(\&Math::Cephes::euclid,$safeeval,'&euclid');
814:
815: $safehole->wrap(\&Math::Random::random_beta,$safeeval,'&math_random_beta');
816: $safehole->wrap(\&Math::Random::random_chi_square,$safeeval,'&math_random_chi_square');
817: $safehole->wrap(\&Math::Random::random_exponential,$safeeval,'&math_random_exponential');
818: $safehole->wrap(\&Math::Random::random_f,$safeeval,'&math_random_f');
819: $safehole->wrap(\&Math::Random::random_gamma,$safeeval,'&math_random_gamma');
820: $safehole->wrap(\&Math::Random::random_multivariate_normal,$safeeval,'&math_random_multivariate_normal');
821: $safehole->wrap(\&Math::Random::random_multinomial,$safeeval,'&math_random_multinomial');
822: $safehole->wrap(\&Math::Random::random_noncentral_chi_square,$safeeval,'&math_random_noncentral_chi_square');
823: $safehole->wrap(\&Math::Random::random_noncentral_f,$safeeval,'&math_random_noncentral_f');
824: $safehole->wrap(\&Math::Random::random_normal,$safeeval,'&math_random_normal');
825: $safehole->wrap(\&Math::Random::random_permutation,$safeeval,'&math_random_permutation');
826: $safehole->wrap(\&Math::Random::random_permuted_index,$safeeval,'&math_random_permuted_index');
827: $safehole->wrap(\&Math::Random::random_uniform,$safeeval,'&math_random_uniform');
828: $safehole->wrap(\&Math::Random::random_poisson,$safeeval,'&math_random_poisson');
829: $safehole->wrap(\&Math::Random::random_uniform_integer,$safeeval,'&math_random_uniform_integer');
830: $safehole->wrap(\&Math::Random::random_negative_binomial,$safeeval,'&math_random_negative_binomial');
831: $safehole->wrap(\&Math::Random::random_binomial,$safeeval,'&math_random_binomial');
832: $safehole->wrap(\&Math::Random::random_seed_from_phrase,$safeeval,'&random_seed_from_phrase');
833: $safehole->wrap(\&Math::Random::random_set_seed_from_phrase,$safeeval,'&random_set_seed_from_phrase');
834: $safehole->wrap(\&Math::Random::random_get_seed,$safeeval,'&random_get_seed');
835: $safehole->wrap(\&Math::Random::random_set_seed,$safeeval,'&random_set_seed');
836: $safehole->wrap(\&Apache::loncommon::languages,$safeeval,'&languages');
837: $safehole->wrap(\&Apache::lonxml::error,$safeeval,'&LONCAPA_INTERNAL_ERROR');
838: $safehole->wrap(\&Apache::lonxml::debug,$safeeval,'&LONCAPA_INTERNAL_DEBUG');
839: $safehole->wrap(\&Apache::lonnet::logthis,$safeeval,'&LONCAPA_INTERNAL_LOGTHIS');
840: $safehole->wrap(\&Apache::inputtags::finalizeawards,$safeeval,'&LONCAPA_INTERNAL_FINALIZEAWARDS');
841: $safehole->wrap(\&Apache::caparesponse::get_sigrange,$safeeval,'&LONCAPA_INTERNAL_get_sigrange');
842: # use Data::Dumper;
843: # $safehole->wrap(\&Data::Dumper::Dumper,$safeeval,'&LONCAPA_INTERNAL_Dumper');
844: #need to inspect this class of ops
845: # $safeeval->deny(":base_orig");
846: $safeeval->permit("require");
847: $safeinit .= ';$external::target="'.$target.'";';
848: &Apache::run::run($safeinit,$safeeval);
849: &initialize_rndseed($safeeval);
850: }
851:
852: sub clean_safespace {
853: my ($safeeval) = @_;
854: delete_package_recurse($safeeval->{Root});
855: }
856:
857: sub delete_package_recurse {
858: my ($package) = @_;
859: my @subp;
860: {
861: no strict 'refs';
862: while (my ($key,$val) = each(%{*{"$package\::"}})) {
863: if (!defined($val)) { next; }
864: local (*ENTRY) = $val;
865: if (defined *ENTRY{HASH} && $key =~ /::$/ &&
866: $key ne "main::" && $key ne "<none>::")
867: {
868: my ($p) = $package ne "main" ? "$package\::" : "";
869: ($p .= $key) =~ s/::$//;
870: push(@subp,$p);
871: }
872: }
873: }
874: foreach my $p (@subp) {
875: delete_package_recurse($p);
876: }
877: Symbol::delete_package($package);
878: }
879:
880: sub initialize_rndseed {
881: my ($safeeval)=@_;
882: my $rndseed;
883: my ($symb,$courseid,$domain,$name) = &Apache::lonnet::whichuser();
884: $rndseed=&Apache::lonnet::rndseed($symb,$courseid,$domain,$name);
885: my $safeinit = '$external::randomseed="'.$rndseed.'";';
886: &Apache::lonxml::debug("Setting rndseed to $rndseed");
887: &Apache::run::run($safeinit,$safeeval);
888: }
889:
890: sub default_homework_load {
891: my ($safeeval)=@_;
892: &Apache::lonxml::debug('Loading default_homework');
893: my $default=&Apache::lonnet::getfile('/home/httpd/html/res/adm/includes/default_homework.lcpm');
894: if ($default eq -1) {
895: &Apache::lonxml::error("<b>Unable to find <i>default_homework.lcpm</i></b>");
896: } else {
897: &Apache::run::run($default,$safeeval);
898: $Apache::lonxml::default_homework_loaded=1;
899: }
900: }
901:
902: {
903: my $alarm_depth;
904: sub init_alarm {
905: alarm(0);
906: $alarm_depth=0;
907: }
908:
909: sub start_alarm {
910: if ($alarm_depth<1) {
911: my $old=alarm($Apache::lonnet::perlvar{'lonScriptTimeout'});
912: if ($old) {
913: &Apache::lonxml::error("Cancelled an alarm of $old, this shouldn't occur.");
914: }
915: }
916: $alarm_depth++;
917: }
918:
919: sub end_alarm {
920: $alarm_depth--;
921: if ($alarm_depth<1) { alarm(0); }
922: }
923: }
924: my $metamode_was;
925: sub startredirection {
926: if (!$Apache::lonxml::redirection) {
927: $metamode_was=$Apache::lonxml::metamode;
928: }
929: $Apache::lonxml::metamode=0;
930: $Apache::lonxml::redirection++;
931: push (@Apache::lonxml::outputstack, '');
932: }
933:
934: sub endredirection {
935: if (!$Apache::lonxml::redirection) {
936: &Apache::lonxml::error("Endredirection was called before a startredirection, perhaps you have unbalanced tags. Some debugging information:".join ":",caller);
937: return '';
938: }
939: $Apache::lonxml::redirection--;
940: if (!$Apache::lonxml::redirection) {
941: $Apache::lonxml::metamode=$metamode_was;
942: }
943: pop @Apache::lonxml::outputstack;
944: }
945: sub in_redirection {
946: return ($Apache::lonxml::redirection > 0)
947: }
948:
949: sub end_tag {
950: my ($tagstack,$parstack,$token)=@_;
951: pop(@$tagstack);
952: pop(@$parstack);
953: &decreasedepth($token);
954: }
955:
956: sub initdepth {
957: @Apache::lonxml::depthcounter=();
958: undef($Apache::lonxml::last_depth_count);
959: }
960:
961:
962: my @timers;
963: my $lasttime;
964: # @Apache::lonxml::depthcounter -> count of tags that exist so
965: # far at each level
966: # $Apache::lonxml::last_depth_count -> when ascending, need to
967: # remember the count for the level below the current level (for
968: # example going from 1_2 -> 1 -> 1_3 need to remember the 2 )
969:
970: sub increasedepth {
971: my ($token) = @_;
972: push(@Apache::lonxml::depthcounter,$Apache::lonxml::last_depth_count+1);
973: undef($Apache::lonxml::last_depth_count);
974: my $time;
975: if ($Apache::lonxml::debug eq "1") {
976: push(@timers,[&gettimeofday()]);
977: $time=&tv_interval($lasttime);
978: $lasttime=[&gettimeofday()];
979: }
980: my $spacing=' 'x($#Apache::lonxml::depthcounter);
981: $Apache::lonxml::curdepth=join('_',@Apache::lonxml::depthcounter);
982: # &Apache::lonxml::debug("s$spacing$Apache::lonxml::depth : $Apache::lonxml::olddepth : $Apache::lonxml::curdepth : $token->[1] : $time");
983: #print "<br />s $Apache::lonxml::depth : $Apache::lonxml::olddepth : $curdepth : $token->[1]\n";
984: }
985:
986: sub decreasedepth {
987: my ($token) = @_;
988: if ( $#Apache::lonxml::depthcounter == -1) {
989: &Apache::lonxml::warning(&mt("Missing tags, unable to properly run file."));
990: }
991: $Apache::lonxml::last_depth_count = pop(@Apache::lonxml::depthcounter);
992:
993: my ($timer,$time);
994: if ($Apache::lonxml::debug eq "1") {
995: $timer=pop(@timers);
996: $time=&tv_interval($lasttime);
997: $lasttime=[&gettimeofday()];
998: }
999: my $spacing=' 'x($#Apache::lonxml::depthcounter);
1000: $Apache::lonxml::curdepth = join('_',@Apache::lonxml::depthcounter);
1001: # &Apache::lonxml::debug("e$spacing$Apache::lonxml::depth : $Apache::lonxml::olddepth : $Apache::lonxml::curdepth : $token->[1] : $time : ".&tv_interval($timer));
1002: #print "<br />e $Apache::lonxml::depth : $Apache::lonxml::olddepth : $token->[1] : $curdepth\n";
1003: }
1004:
1005: sub get_id {
1006: my ($parstack,$safeeval)=@_;
1007: my $id= &Apache::lonxml::get_param('id',$parstack,$safeeval);
1008: if ($env{'request.state'} eq 'construct' && $id =~ /([._]|[^\w\d\s[:punct:]])/) {
1009: &error(&mt("ID "[_1]" contains invalid characters, IDs are only allowed to contain letters, numbers, spaces and -",'<tt>'.$id.'</tt>'));
1010: }
1011: if ($id =~ /^\s*$/) { $id = $Apache::lonxml::curdepth; }
1012: return $id;
1013: }
1014:
1015: sub get_all_text_unbalanced {
1016: #there is a copy of this in lonpublisher.pm
1017: my($tag,$pars)= @_;
1018: my $token;
1019: my $result='';
1020: $tag='<'.$tag.'>';
1021: while ($token = $$pars[-1]->get_token) {
1022: if (($token->[0] eq 'T')||($token->[0] eq 'C')||($token->[0] eq 'D')) {
1023: if ($token->[0] eq 'T' && $token->[2]) {
1024: $result.='<![CDATA['.$token->[1].']]>';
1025: } else {
1026: $result.=$token->[1];
1027: }
1028: } elsif ($token->[0] eq 'PI') {
1029: $result.=$token->[2];
1030: } elsif ($token->[0] eq 'S') {
1031: $result.=$token->[4];
1032: } elsif ($token->[0] eq 'E') {
1033: $result.=$token->[2];
1034: }
1035: if ($result =~ /\Q$tag\E/is) {
1036: ($result,my $redo)=$result =~ /(.*)\Q$tag\E(.*)/is;
1037: #&Apache::lonxml::debug('Got a winner with leftovers ::'.$2);
1038: #&Apache::lonxml::debug('Result is :'.$1);
1039: $redo=$tag.$redo;
1040: &Apache::lonxml::newparser($pars,\$redo);
1041: last;
1042: }
1043: }
1044: return $result
1045:
1046: }
1047:
1048: #########################################################################
1049: # #
1050: # bubble line counter management #
1051: # #
1052: #########################################################################
1053:
1054: =pod
1055:
1056: For bubble grading mode and exam bubble printing mode, the tracking of
1057: the current 'bubble line number' is stored in the %env element
1058: 'form.counter', and is modifed and handled by the following routines.
1059:
1060: The value of it is stored in $Apache:lonxml::counter when live and
1061: stored back to env after done.
1062:
1063: =item &increment_counter($increment);
1064:
1065: Increments the internal counter environment variable a specified amount
1066:
1067: Optional Arguments:
1068: $increment - amount to increment by (defaults to 1)
1069: Also 1 if the value is negative or zero.
1070: $part_response - A concatenation of the part and response id
1071: identifying exactly what is being 'answered'.
1072:
1073:
1074: =cut
1075:
1076: sub increment_counter {
1077: my ($increment, $part_response) = @_;
1078: if (!defined($increment) || $increment le 0) {
1079: $increment = 1;
1080: }
1081: $Apache::lonxml::counter += $increment;
1082:
1083: # If the caller supplied the response_id parameter,
1084: # Maintain its counter.. creating if necessary.
1085:
1086: if (defined($part_response)) {
1087: if (!defined($Apache::lonxml::counters_per_part{$part_response})) {
1088: $Apache::lonxml::counters_per_part{$part_response} = 0;
1089: }
1090: $Apache::lonxml::counters_per_part{$part_response} += $increment;
1091: my $new_value = $Apache::lonxml::counters_per_part{$part_response};
1092: }
1093:
1094: $Apache::lonxml::counter_changed=1;
1095: }
1096:
1097: =pod
1098:
1099: =item &init_counter($increment);
1100:
1101: Initialize the internal counter environment variable
1102:
1103: =cut
1104:
1105: sub init_counter {
1106: if ($env{'request.state'} eq 'construct') {
1107: $Apache::lonxml::counter=1;
1108: $Apache::lonxml::counter_changed=1;
1109: } elsif (defined($env{'form.counter'})) {
1110: $Apache::lonxml::counter=$env{'form.counter'};
1111: $Apache::lonxml::counter_changed=0;
1112: } else {
1113: $Apache::lonxml::counter=1;
1114: $Apache::lonxml::counter_changed=1;
1115: }
1116: }
1117:
1118: sub store_counter {
1119: &Apache::lonnet::appenv(('form.counter' => $Apache::lonxml::counter));
1120: $Apache::lonxml::counter_changed=0;
1121: return '';
1122: }
1123:
1124: {
1125: my $state;
1126: sub clear_problem_counter {
1127: undef($state);
1128: &Apache::lonnet::delenv('form.counter');
1129: &Apache::lonxml::init_counter();
1130: &Apache::lonxml::store_counter();
1131: }
1132:
1133: sub remember_problem_counter {
1134: &Apache::lonnet::transfer_profile_to_env(undef,undef,1);
1135: $state = $env{'form.counter'};
1136: }
1137:
1138: sub restore_problem_counter {
1139: if (defined($state)) {
1140: &Apache::lonnet::appenv(('form.counter' => $state));
1141: }
1142: }
1143: sub get_problem_counter {
1144: if ($Apache::lonxml::counter_changed) { &store_counter() }
1145: &Apache::lonnet::transfer_profile_to_env(undef,undef,1);
1146: return $env{'form.counter'};
1147: }
1148: }
1149:
1150: =pod
1151:
1152: =item bubble_lines_for_part(part_response)
1153:
1154: Returns the number of lines required to get a response for
1155: $part_response (this is just $Apache::lonxml::counters_per_part{$part_response}
1156:
1157: =cut
1158:
1159: sub bubble_lines_for_part {
1160: my ($part_response) = @_;
1161:
1162: if (!defined($Apache::lonxml::counters_per_part{$part_response})) {
1163: return 0;
1164: } else {
1165: return $Apache::lonxml::counters_per_part{$part_response};
1166: }
1167: }
1168:
1169: =pod
1170:
1171: =item clear_bubble_lines_for_part
1172:
1173: Clears the hash of bubble lines per part. If a caller
1174: needs to analyze several resources this should be called between
1175: resources to reset the hash for each problem being analyzed.
1176:
1177: =cut
1178:
1179: sub clear_bubble_lines_for_part {
1180: undef(%Apache::lonxml::counters_per_part);
1181: }
1182:
1183: =pod
1184:
1185: =item set_bubble_lines(part_response, value)
1186:
1187: If there is a problem part, that for whatever reason
1188: requires bubble lines that are not
1189: the same as the counter increment, it can call this sub during
1190: analysis to set its hash value explicitly.
1191:
1192: =cut
1193:
1194: sub set_bubble_lines {
1195: my ($part_response, $value) = @_;
1196:
1197: $Apache::lonxml::counters_per_part{$part_response} = $value;
1198: }
1199:
1200: =pod
1201:
1202: =item get_bubble_line_hash
1203:
1204: Returns the current bubble line hash. This is assumed to
1205: be small so we return a copy
1206:
1207:
1208: =cut
1209:
1210: sub get_bubble_line_hash {
1211: return %Apache::lonxml::counters_per_part;
1212: }
1213:
1214:
1215: #--------------------------------------------------
1216:
1217: sub get_all_text {
1218: my($tag,$pars,$style)= @_;
1219: my $gotfullstack=1;
1220: if (ref($pars) ne 'ARRAY') {
1221: $gotfullstack=0;
1222: $pars=[$pars];
1223: }
1224: if (ref($style) ne 'HASH') {
1225: $style={};
1226: }
1227: my $depth=0;
1228: my $token;
1229: my $result='';
1230: if ( $tag =~ m:^/: ) {
1231: my $tag=substr($tag,1);
1232: #&Apache::lonxml::debug("have:$tag:");
1233: my $top_empty=0;
1234: while (($depth >=0) && ($#$pars > -1) && (!$top_empty)) {
1235: while (($depth >=0) && ($token = $$pars[-1]->get_token)) {
1236: #&Apache::lonxml::debug("e token:$token->[0]:$depth:$token->[1]:".$#$pars.":".$#Apache::lonxml::pwd);
1237: if (($token->[0] eq 'T')||($token->[0] eq 'C')||($token->[0] eq 'D')) {
1238: if ($token->[2]) {
1239: $result.='<![CDATA['.$token->[1].']]>';
1240: } else {
1241: $result.=$token->[1];
1242: }
1243: } elsif ($token->[0] eq 'PI') {
1244: $result.=$token->[2];
1245: } elsif ($token->[0] eq 'S') {
1246: if ($token->[1] =~ /^\Q$tag\E$/i) { $depth++; }
1247: if ($token->[1] =~ /^LONCAPA_INTERNAL_TURN_STYLE_ON$/) { $Apache::lonxml::usestyle=1; }
1248: if ($token->[1] =~ /^LONCAPA_INTERNAL_TURN_STYLE_OFF$/) { $Apache::lonxml::usestyle=0; }
1249: $result.=$token->[4];
1250: } elsif ($token->[0] eq 'E') {
1251: if ( $token->[1] =~ /^\Q$tag\E$/i) { $depth--; }
1252: #skip sending back the last end tag
1253: if ($depth == 0 && exists($$style{'/'.$token->[1]}) && $Apache::lonxml::usestyle) {
1254: my $string=
1255: '<LONCAPA_INTERNAL_TURN_STYLE_OFF end="yes" />'.
1256: $$style{'/'.$token->[1]}.
1257: $token->[2].
1258: '<LONCAPA_INTERNAL_TURN_STYLE_ON />';
1259: &Apache::lonxml::newparser($pars,\$string);
1260: #&Apache::lonxml::debug("reParsing $string");
1261: next;
1262: }
1263: if ($depth > -1) {
1264: $result.=$token->[2];
1265: } else {
1266: $$pars[-1]->unget_token($token);
1267: }
1268: }
1269: }
1270: if (($depth >=0) && ($#$pars == 0) ) { $top_empty=1; }
1271: if (($depth >=0) && ($#$pars > 0) ) {
1272: pop(@$pars);
1273: pop(@Apache::lonxml::pwd);
1274: }
1275: }
1276: if ($top_empty && $depth >= 0) {
1277: #never found the end tag ran out of text, throw error send back blank
1278: &error('Never found end tag for <'.$tag.
1279: '> current string <pre>'.
1280: &HTML::Entities::encode($result,'<>&"').
1281: '</pre>');
1282: if ($gotfullstack) {
1283: my $newstring='</'.$tag.'>'.$result;
1284: &Apache::lonxml::newparser($pars,\$newstring);
1285: }
1286: $result='';
1287: }
1288: } else {
1289: while ($#$pars > -1) {
1290: while ($token = $$pars[-1]->get_token) {
1291: #&Apache::lonxml::debug("s token:$token->[0]:$depth:$token->[1]");
1292: if (($token->[0] eq 'T')||($token->[0] eq 'C')||
1293: ($token->[0] eq 'D')) {
1294: if ($token->[2]) {
1295: $result.='<![CDATA['.$token->[1].']]>';
1296: } else {
1297: $result.=$token->[1];
1298: }
1299: } elsif ($token->[0] eq 'PI') {
1300: $result.=$token->[2];
1301: } elsif ($token->[0] eq 'S') {
1302: if ( $token->[1] =~ /^\Q$tag\E$/i) {
1303: $$pars[-1]->unget_token($token); last;
1304: } else {
1305: $result.=$token->[4];
1306: }
1307: if ($token->[1] =~ /^LONCAPA_INTERNAL_TURN_STYLE_ON$/) { $Apache::lonxml::usestyle=1; }
1308: if ($token->[1] =~ /^LONCAPA_INTERNAL_TURN_STYLE_OFF$/) { $Apache::lonxml::usestyle=0; }
1309: } elsif ($token->[0] eq 'E') {
1310: $result.=$token->[2];
1311: }
1312: }
1313: if (($#$pars > 0) ) {
1314: pop(@$pars);
1315: pop(@Apache::lonxml::pwd);
1316: } else { last; }
1317: }
1318: }
1319: #&Apache::lonxml::debug("Exit:$result:");
1320: return $result
1321: }
1322:
1323: sub newparser {
1324: my ($parser,$contentref,$dir) = @_;
1325: push (@$parser,HTML::LCParser->new($contentref));
1326: $$parser[-1]->xml_mode(1);
1327: $$parser[-1]->marked_sections(1);
1328: if ( $dir eq '' ) {
1329: push (@Apache::lonxml::pwd, $Apache::lonxml::pwd[$#Apache::lonxml::pwd]);
1330: } else {
1331: push (@Apache::lonxml::pwd, $dir);
1332: }
1333: }
1334:
1335: sub parstring {
1336: my ($token) = @_;
1337: my (@vars,@values);
1338: foreach my $attr (@{$token->[3]}) {
1339: if ($attr!~/\W/) {
1340: my $val=$token->[2]->{$attr};
1341: $val =~ s/([\%\@\\\"\'])/\\$1/g;
1342: $val =~ s/(\$[^\{a-zA-Z_])/\\$1/g;
1343: $val =~ s/(\$)$/\\$1/;
1344: #if ($val =~ m/^[\%\@]/) { $val="\\".$val; }
1345: push(@vars,"\$$attr");
1346: push(@values,"\"$val\"");
1347: }
1348: }
1349: my $var_init =
1350: (@vars) ? 'my ('.join(',',@vars).') = ('.join(',',@values).');'
1351: : '';
1352: return $var_init;
1353: }
1354:
1355: sub extlink {
1356: my ($res,$exact)=@_;
1357: if (!$exact) {
1358: $res=&Apache::lonnet::hreflocation($Apache::lonxml::pwd[-1],$res);
1359: }
1360: push(@Apache::lonxml::extlinks,$res)
1361: }
1362:
1363: sub writeallows {
1364: unless ($#extlinks>=0) { return; }
1365: my $thisurl = &Apache::lonnet::clutter(shift);
1366: if ($env{'httpref.'.$thisurl}) {
1367: $thisurl=$env{'httpref.'.$thisurl};
1368: }
1369: my $thisdir=$thisurl;
1370: $thisdir=~s/\/[^\/]+$//;
1371: my %httpref=();
1372: foreach (@extlinks) {
1373: $httpref{'httpref.'.
1374: &Apache::lonnet::hreflocation($thisdir,&unescape($_))}=$thisurl;
1375: }
1376: @extlinks=();
1377: &Apache::lonnet::appenv(%httpref);
1378: }
1379:
1380: sub register_ssi {
1381: my ($url,%form)=@_;
1382: push (@Apache::lonxml::ssi_info,{'url'=>$url,'form'=>\%form});
1383: return '';
1384: }
1385:
1386: sub do_registered_ssi {
1387: foreach my $info (@Apache::lonxml::ssi_info) {
1388: my %form=%{ $info->{'form'}};
1389: my $url=$info->{'url'};
1390: &Apache::lonnet::ssi($url,%form);
1391: }
1392: }
1393:
1394: sub add_script_result {
1395: my ($display) = @_;
1396: push(@script_var_displays, $display);
1397: }
1398:
1399: #
1400: # Afterburner handles anchors, highlights and links
1401: #
1402: sub afterburn {
1403: my $result=shift;
1404: &Apache::loncommon::get_unprocessed_cgi($ENV{'QUERY_STRING'},
1405: ['highlight','anchor','link']);
1406: if ($env{'form.highlight'}) {
1407: foreach (split(/\,/,$env{'form.highlight'})) {
1408: my $anchorname=$_;
1409: my $matchthis=$anchorname;
1410: $matchthis=~s/\_+/\\s\+/g;
1411: $result=~s/(\Q$matchthis\E)/\<font color=\"red\"\>$1\<\/font\>/gs;
1412: }
1413: }
1414: if ($env{'form.link'}) {
1415: foreach (split(/\,/,$env{'form.link'})) {
1416: my ($anchorname,$linkurl)=split(/\>/,$_);
1417: my $matchthis=$anchorname;
1418: $matchthis=~s/\_+/\\s\+/g;
1419: $result=~s/(\Q$matchthis\E)/\<a href=\"$linkurl\"\>$1\<\/a\>/gs;
1420: }
1421: }
1422: if ($env{'form.anchor'}) {
1423: my $anchorname=$env{'form.anchor'};
1424: my $matchthis=$anchorname;
1425: $matchthis=~s/\_+/\\s\+/g;
1426: $result=~s/(\Q$matchthis\E)/\<a name=\"$anchorname\"\>$1\<\/a\>/s;
1427: $result.=(<<"ENDSCRIPT");
1428: <script type="text/javascript">
1429: document.location.hash='$anchorname';
1430: </script>
1431: ENDSCRIPT
1432: }
1433: return $result;
1434: }
1435:
1436: sub storefile {
1437: my ($file,$contents)=@_;
1438: &Apache::lonnet::correct_line_ends(\$contents);
1439: if (my $fh=Apache::File->new('>'.$file)) {
1440: print $fh $contents;
1441: $fh->close();
1442: return 1;
1443: } else {
1444: &warning("Unable to save file $file");
1445: return 0;
1446: }
1447: }
1448:
1449: sub createnewhtml {
1450: my $title=&mt('Title of document goes here');
1451: my $body=&mt('Body of document goes here');
1452: my $filecontents=(<<SIMPLECONTENT);
1453: <html>
1454: <head>
1455: <title>$title</title>
1456: </head>
1457: <body bgcolor="#FFFFFF">
1458: $body
1459: </body>
1460: </html>
1461: SIMPLECONTENT
1462: return $filecontents;
1463: }
1464:
1465: sub createnewsty {
1466: my $filecontents=(<<SIMPLECONTENT);
1467: <definetag name="">
1468: <render>
1469: <web></web>
1470: <tex></tex>
1471: </render>
1472: </definetag>
1473: SIMPLECONTENT
1474: return $filecontents;
1475: }
1476:
1477:
1478: sub inserteditinfo {
1479: my ($filecontents, $filetype, $filename)=@_;
1480: $filecontents = &HTML::Entities::encode($filecontents,'<>&"');
1481: # my $editheader='<a href="#editsection">Edit below</a><hr />';
1482: my $xml_help = '';
1483: my $initialize='';
1484: my $textarea_id = 'filecont';
1485: my ($add_to_onload, $add_to_onresize);
1486: $initialize=&Apache::lonhtmlcommon::spellheader();
1487: if ($filetype eq 'html'
1488: && (!&Apache::lonhtmlcommon::htmlareablocked() &&
1489: &Apache::lonhtmlcommon::htmlareabrowser())) {
1490: $textarea_id .= '___Frame';
1491: my $lang = &Apache::lonhtmlcommon::htmlarea_lang();
1492: $initialize.=(<<FULLPAGE);
1493: <script type="text/javascript">
1494: lonca
1495: function initDocument() {
1496: var oFCKeditor = new FCKeditor('filecont');
1497: oFCKeditor.Config['CustomConfigurationsPath'] = '/fckeditor/loncapaconfig.js' ;
1498: oFCKeditor.Config['FullPage'] = true
1499: oFCKeditor.Config['AutoDetectLanguage'] = false;
1500: oFCKeditor.Config['DefaultLanguage'] = "$lang";
1501: oFCKeditor.ReplaceTextarea();
1502: }
1503: function check_if_dirty(editor) {
1504: if (editor.IsDirty()) {
1505: unClean();
1506: }
1507: }
1508: function FCKeditor_OnComplete(editor) {
1509: editor.Events.AttachEvent("OnSelectionChange",check_if_dirty);
1510: resize_textarea('$textarea_id','LC_aftertextarea');
1511: }
1512: </script>
1513: FULLPAGE
1514: } else {
1515: $initialize.=(<<FULLPAGE);
1516: <script type="text/javascript">
1517: function initDocument() {
1518: resize_textarea('$textarea_id','LC_aftertextarea');
1519: }
1520: </script>
1521: FULLPAGE
1522: }
1523:
1524: $add_to_onload = 'initDocument();';
1525: $add_to_onresize = "resize_textarea('$textarea_id','LC_aftertextarea');";
1526:
1527: if ($filetype eq 'html') {
1528: $xml_help=&Apache::loncommon::helpLatexCheatsheet();
1529: }
1530:
1531: my $titledisplay=&display_title();
1532: my %lt=&Apache::lonlocal::texthash('st' => 'Save and Edit',
1533: 'vi' => 'Save and View',
1534: 'dv' => 'Discard Edits and View',
1535: 'un' => 'undo',
1536: 'ed' => 'Edit');
1537: my $spelllink .=&Apache::lonhtmlcommon::spelllink('xmledit','filecont');
1538: my $textarea_events = &Apache::edit::element_change_detection();
1539: my $form_events = &Apache::edit::form_change_detection();
1540: my $editfooter=(<<ENDFOOTER);
1541: $initialize
1542: <a name="editsection" />
1543: <form $form_events method="post" name="xmledit">
1544: <div class="LC_edit_problem_editxml_header">
1545: <table class="LC_edit_problem_header_title"><tr><td>
1546: $filename
1547: </td><td align="right">
1548: $xml_help
1549: </td></tr>
1550: </table>
1551: <div class="LC_edit_problem_discards">
1552: <input type="submit" name="discardview" accesskey="d" value="$lt{'dv'}" />
1553: <input type="submit" name="Undo" accesskey="u" value="$lt{'un'}" />
1554: $spelllink
1555: </div>
1556: <div class="LC_edit_problem_saves">
1557: <input type="submit" name="savethisfile" accesskey="s" value="$lt{'st'}" />
1558: <input type="submit" name="viewmode" accesskey="v" value="$lt{'vi'}" />
1559: </div>
1560: </div>
1561: <textarea $textarea_events style="width:100%" cols="80" rows="44" name="filecont" id="filecont">$filecontents</textarea>
1562: <div id="LC_aftertextarea">
1563: <br />
1564: $titledisplay
1565: </div>
1566: </form>
1567: </body>
1568: ENDFOOTER
1569: return ($editfooter,$add_to_onload,$add_to_onresize);;
1570: }
1571:
1572: sub get_target {
1573: my $viewgrades=&Apache::lonnet::allowed('vgr',$env{'request.course.id'});
1574: if ( $env{'request.state'} eq 'published') {
1575: if ( defined($env{'form.grade_target'})
1576: && ($viewgrades == 'F' )) {
1577: return ($env{'form.grade_target'});
1578: } elsif (defined($env{'form.grade_target'})) {
1579: if (($env{'form.grade_target'} eq 'web') ||
1580: ($env{'form.grade_target'} eq 'tex') ) {
1581: return $env{'form.grade_target'}
1582: } else {
1583: return 'web';
1584: }
1585: } else {
1586: return 'web';
1587: }
1588: } elsif ($env{'request.state'} eq 'construct') {
1589: if ( defined($env{'form.grade_target'})) {
1590: return ($env{'form.grade_target'});
1591: } else {
1592: return 'web';
1593: }
1594: } else {
1595: return 'web';
1596: }
1597: }
1598:
1599: sub handler {
1600: my $request=shift;
1601:
1602: my $target=&get_target();
1603:
1604: $Apache::lonxml::debug=$env{'user.debug'};
1605:
1606: &Apache::loncommon::content_type($request,'text/html');
1607: &Apache::loncommon::no_cache($request);
1608: if ($env{'request.state'} eq 'published') {
1609: $request->set_last_modified(&Apache::lonnet::metadata($request->uri,
1610: 'lastrevisiondate'));
1611: }
1612: $request->send_http_header;
1613:
1614: return OK if $request->header_only;
1615:
1616:
1617: my $file=&Apache::lonnet::filelocation("",$request->uri);
1618: my $filetype;
1619: if ($file =~ /\.sty$/) {
1620: $filetype='sty';
1621: } else {
1622: $filetype='html';
1623: }
1624: #
1625: # Edit action? Save file.
1626: #
1627: if (!($env{'request.state'} eq 'published')) {
1628: if ($env{'form.savethisfile'} || $env{'form.viewmode'} || $env{'form.Undo'}) {
1629: my $html_file=&Apache::lonnet::getfile($file);
1630: my $error = &Apache::lonhomework::handle_save_or_undo($request, \$html_file, \$env{'form.filecont'});
1631: }
1632: }
1633: my %mystyle;
1634: my $result = '';
1635: my $filecontents=&Apache::lonnet::getfile($file);
1636: if ($filecontents eq -1) {
1637: my $start_page=&Apache::loncommon::start_page('File Error');
1638: my $end_page=&Apache::loncommon::end_page();
1639: my $fnf=&mt('File not found');
1640: $result=(<<ENDNOTFOUND);
1641: $start_page
1642: <b>$fnf: $file</b>
1643: $end_page
1644: ENDNOTFOUND
1645: $filecontents='';
1646: if ($env{'request.state'} ne 'published') {
1647: if ($filetype eq 'sty') {
1648: $filecontents=&createnewsty();
1649: } else {
1650: $filecontents=&createnewhtml();
1651: }
1652: $env{'form.editmode'}='Edit'; #force edit mode
1653: }
1654: } else {
1655: unless ($env{'request.state'} eq 'published') {
1656: if ($filecontents=~/BEGIN LON-CAPA Internal/) {
1657: &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.'));
1658: }
1659: #
1660: # we are in construction space, see if edit mode forced
1661: &Apache::loncommon::get_unprocessed_cgi($ENV{'QUERY_STRING'},
1662: ['editmode']);
1663: }
1664: if (!$env{'form.editmode'} || $env{'form.viewmode'} || $env{'form.discardview'}) {
1665: &Apache::structuretags::reset_problem_globals();
1666: $result = &Apache::lonxml::xmlparse($request,$target,$filecontents,
1667: '',%mystyle);
1668: # .html files may contain <problem> or <Task> need to clean
1669: # up if it did
1670: &Apache::structuretags::reset_problem_globals();
1671: &Apache::lonhomework::finished_parsing();
1672: &Apache::loncommon::get_unprocessed_cgi($ENV{'QUERY_STRING'},
1673: ['rawmode']);
1674: if ($env{'form.rawmode'}) { $result = $filecontents; }
1675: if ($filetype eq 'sty') {
1676: my $controls =
1677: ($env{'request.state'} eq 'construct') ? &Apache::londefdef::edit_controls()
1678: : '';
1679: my %options = ('bgcolor' => '#FFFFFF');
1680: $result =
1681: &Apache::loncommon::start_page(undef,undef,\%options).
1682: $controls.
1683: $result.
1684: &Apache::loncommon::end_page();
1685: }
1686: }
1687: }
1688:
1689: #
1690: # Edit action? Insert editing commands
1691: #
1692: unless ($env{'request.state'} eq 'published') {
1693: if ($env{'form.editmode'} && (!($env{'form.viewmode'})) && (!($env{'form.discardview'})))
1694: {
1695: my $displayfile=$request->uri;
1696: $displayfile=~s/^\/[^\/]*//;
1697:
1698: my ($edit_info, $add_to_onload, $add_to_onresize)=
1699: &inserteditinfo($filecontents,$filetype,$displayfile);
1700:
1701: my %options =
1702: ('add_entries' =>
1703: {'onresize' => $add_to_onresize,
1704: 'onload' => $add_to_onload, });
1705:
1706: if ($env{'environment.remote'} ne 'off') {
1707: $options{'bgcolor'} = '#FFFFFF';
1708: $options{'only_body'} = 1;
1709: }
1710: my $js =
1711: &Apache::edit::js_change_detection().
1712: &Apache::loncommon::resize_textarea_js();
1713: my $start_page = &Apache::loncommon::start_page(undef,$js,
1714: \%options);
1715: $result=$start_page.
1716: &Apache::lonxml::message_location().
1717: $edit_info.
1718: &Apache::loncommon::end_page();
1719: }
1720: }
1721: if ($filetype eq 'html') { &writeallows($request->uri); }
1722:
1723: &Apache::lonxml::add_messages(\$result);
1724: $request->print($result);
1725:
1726: return OK;
1727: }
1728:
1729: sub display_title {
1730: my $result;
1731: if ($env{'request.state'} eq 'construct') {
1732: my $title=&Apache::lonnet::gettitle();
1733: if (!defined($title) || $title eq '') {
1734: $title = $env{'request.filename'};
1735: $title = substr($title, rindex($title, '/') + 1);
1736: }
1737: $result = "<script type='text/javascript'>top.document.title = '$title - LON-CAPA Construction Space';</script>";
1738: }
1739: return $result;
1740: }
1741:
1742: sub debug {
1743: if ($Apache::lonxml::debug eq "1") {
1744: $|=1;
1745: my $request=$Apache::lonxml::request;
1746: if (!$request) {
1747: eval { $request=Apache->request; };
1748: }
1749: if (!$request) {
1750: eval { $request=Apache2::RequestUtil->request; };
1751: }
1752: $request->print('<font size="-2"><pre>DEBUG:'.&HTML::Entities::encode($_[0],'<>&"')."</pre></font>\n");
1753: #&Apache::lonnet::logthis($_[0]);
1754: }
1755: }
1756:
1757: sub show_error_warn_msg {
1758: if ($env{'request.filename'} eq '/home/httpd/html/res/lib/templates/simpleproblem.problem' &&
1759: &Apache::lonnet::allowed('mdc',$env{'request.course.id'})) {
1760: return 1;
1761: }
1762: return (($Apache::lonxml::debug eq 1) ||
1763: ($env{'request.state'} eq 'construct') ||
1764: ($Apache::lonhomework::browse eq 'F'
1765: &&
1766: $env{'form.show_errors'} eq 'on'));
1767: }
1768:
1769: sub error {
1770: my @errors = @_;
1771:
1772: $errorcount++;
1773:
1774: if (defined($Apache::inputtags::part)) {
1775: if ( @Apache::inputtags::response ) {
1776: push(@errors,
1777: &mt("This error occurred while processing response [_1] in part [_2]",
1778: $Apache::inputtags::response[-1],
1779: $Apache::inputtags::part));
1780: } else {
1781: push(@errors,
1782: &mt("This error occurred while processing part [_1]",
1783: $Apache::inputtags::part));
1784: }
1785: }
1786:
1787: if ( &show_error_warn_msg() ) {
1788: # If printing in construction space, put the error inside <pre></pre>
1789: push(@Apache::lonxml::error_messages,
1790: $Apache::lonxml::warnings_error_header.
1791: "<b>ERROR:</b>".join("<br />\n",@errors)."<br />\n");
1792: $Apache::lonxml::warnings_error_header='';
1793: } else {
1794: my $errormsg;
1795: my ($symb)=&Apache::lonnet::symbread();
1796: if ( !$symb ) {
1797: #public or browsers
1798: $errormsg=&mt("An error occured while processing this resource. The author has been notified.");
1799: }
1800: my $host=$Apache::lonnet::perlvar{'lonHostID'};
1801: push(@errors, "The error occurred on host <tt>$host</tt>");
1802:
1803: my $msg = join('<br />', @errors);
1804:
1805: #notify author
1806: &Apache::lonmsg::author_res_msg($env{'request.filename'},$msg);
1807: #notify course
1808: if ( $symb && $env{'request.course.id'} ) {
1809: my $cnum=$env{'course.'.$env{'request.course.id'}.'.num'};
1810: my $cdom=$env{'course.'.$env{'request.course.id'}.'.domain'};
1811: my (undef,%users)=&Apache::lonmsg::decide_receiver(undef,0,1,1,1);
1812: my $declutter=&Apache::lonnet::declutter($env{'request.filename'});
1813: my $baseurl = &Apache::lonnet::clutter($declutter);
1814: my @userlist;
1815: foreach (keys %users) {
1816: my ($user,$domain) = split(/:/, $_);
1817: push(@userlist,"$user\@$domain");
1818: my $key=$declutter.'_'.$user.'_'.$domain;
1819: my %lastnotified=&Apache::lonnet::get('nohist_xmlerrornotifications',
1820: [$key],
1821: $cdom,$cnum);
1822: my $now=time;
1823: if ($now-$lastnotified{$key}>86400) {
1824: my $title = &Apache::lonnet::gettitle($symb);
1825: my $sentmessage;
1826: &Apache::lonmsg::user_normal_msg($user,$domain,
1827: "Error [$title]",$msg,'',$baseurl,'','',
1828: \$sentmessage,$symb,$title,1);
1829: &Apache::lonnet::put('nohist_xmlerrornotifications',
1830: {$key => $now},
1831: $cdom,$cnum);
1832: }
1833: }
1834: if ($env{'request.role.adv'}) {
1835: $errormsg=&mt("An error occured while processing this resource. The course personnel ([_1]) and the author have been notified.",join(', ',@userlist));
1836: } else {
1837: $errormsg=&mt("An error occured while processing this resource. The instructor has been notified.");
1838: }
1839: }
1840: push(@Apache::lonxml::error_messages,"<b>$errormsg</b> <br />");
1841: }
1842: }
1843:
1844: sub warning {
1845: $warningcount++;
1846:
1847: if ($env{'form.grade_target'} ne 'tex') {
1848: if ( &show_error_warn_msg() ) {
1849: push(@Apache::lonxml::warning_messages,
1850: $Apache::lonxml::warnings_error_header.
1851: "<b>W</b>ARNING<b>:</b>".join('<br />',@_)."<br />\n");
1852: $Apache::lonxml::warnings_error_header='';
1853: }
1854: }
1855: }
1856:
1857: sub info {
1858: if ($env{'form.grade_target'} ne 'tex'
1859: && $env{'request.state'} eq 'construct') {
1860: push(@Apache::lonxml::info_messages,join('<br />',@_)."<br />\n");
1861: }
1862: }
1863:
1864: sub message_location {
1865: return '__LONCAPA_INTERNAL_MESSAGE_LOCATION__';
1866: }
1867:
1868: sub add_messages {
1869: my ($msg)=@_;
1870: my $result=join(' ',
1871: @Apache::lonxml::info_messages,
1872: @Apache::lonxml::error_messages,
1873: @Apache::lonxml::warning_messages);
1874: undef(@Apache::lonxml::info_messages);
1875: undef(@Apache::lonxml::error_messages);
1876: undef(@Apache::lonxml::warning_messages);
1877: $$msg=~s/__LONCAPA_INTERNAL_MESSAGE_LOCATION__/$result/;
1878: $$msg=~s/__LONCAPA_INTERNAL_MESSAGE_LOCATION__//g;
1879: }
1880:
1881: sub get_param {
1882: my ($param,$parstack,$safeeval,$context,$case_insensitive) = @_;
1883: if ( ! $context ) { $context = -1; }
1884: my $args ='';
1885: if ( $#$parstack > (-2-$context) ) { $args=$$parstack[$context]; }
1886: if ( ! $Apache::lonxml::usestyle ) {
1887: $args=$Apache::lonxml::style_values.$args;
1888: }
1889: if ( ! $args ) { return undef; }
1890: if ( $case_insensitive ) {
1891: if ($args =~ s/(my (?:.*))(\$\Q$param\E[,\)])/$1.lc($2)/ei) {
1892: return &Apache::run::run("{$args;".'return $'.$param.'}',
1893: $safeeval); #'
1894: } else {
1895: return undef;
1896: }
1897: } else {
1898: if ( $args =~ /my .*\$\Q$param\E[,\)]/ ) {
1899: return &Apache::run::run("{$args;".'return $'.$param.'}',
1900: $safeeval); #'
1901: } else {
1902: return undef;
1903: }
1904: }
1905: }
1906:
1907: sub get_param_var {
1908: my ($param,$parstack,$safeeval,$context,$case_insensitive) = @_;
1909: if ( ! $context ) { $context = -1; }
1910: my $args ='';
1911: if ( $#$parstack > (-2-$context) ) { $args=$$parstack[$context]; }
1912: if ( ! $Apache::lonxml::usestyle ) {
1913: $args=$Apache::lonxml::style_values.$args;
1914: }
1915: &Apache::lonxml::debug("Args are $args param is $param");
1916: if ($case_insensitive) {
1917: if (! ($args=~s/(my (?:.*))(\$\Q$param\E[,\)])/$1.lc($2)/ei)) {
1918: return undef;
1919: }
1920: } elsif ( $args !~ /my .*\$\Q$param\E[,\)]/ ) { return undef; }
1921: my $value=&Apache::run::run("{$args;".'return $'.$param.'}',$safeeval); #'
1922: &Apache::lonxml::debug("first run is $value");
1923: if ($value =~ /^[\$\@\%][a-zA-Z_]\w*$/) {
1924: &Apache::lonxml::debug("doing second");
1925: my @result=&Apache::run::run("return $value",$safeeval,1);
1926: if (!defined($result[0])) {
1927: return $value
1928: } else {
1929: if (wantarray) { return @result; } else { return $result[0]; }
1930: }
1931: } else {
1932: return $value;
1933: }
1934: }
1935:
1936: sub register_insert_xml {
1937: my $parser = HTML::LCParser->new($Apache::lonnet::perlvar{'lonTabDir'}
1938: .'/insertlist.xml');
1939: my ($tagnum,$in_help)=(0,0);
1940: my @alltags;
1941: my $tag;
1942: while (my $token = $parser->get_token()) {
1943: if ($token->[0] eq 'S') {
1944: my $key;
1945: if ($token->[1] eq 'tag') {
1946: $tag = $token->[2]{'name'};
1947: $insertlist{"$tagnum.tag"} = $tag;
1948: $insertlist{"$tag.num"} = $tagnum;
1949: push(@alltags,$tag);
1950: } elsif ($in_help && $token->[1] eq 'file') {
1951: $key = $tag.'.helpfile';
1952: } elsif ($in_help && $token->[1] eq 'description') {
1953: $key = $tag.'.helpdesc';
1954: } elsif ($token->[1] eq 'description' ||
1955: $token->[1] eq 'color' ||
1956: $token->[1] eq 'show' ) {
1957: $key = $tag.'.'.$token->[1];
1958: } elsif ($token->[1] eq 'insert_sub') {
1959: $key = $tag.'.function';
1960: } elsif ($token->[1] eq 'help') {
1961: $in_help=1;
1962: } elsif ($token->[1] eq 'allow') {
1963: $key = $tag.'.allow';
1964: }
1965: if (defined($key)) {
1966: $insertlist{$key} = $parser->get_text();
1967: $insertlist{$key} =~ s/(^\s*|\s*$ )//gx;
1968: }
1969: } elsif ($token->[0] eq 'E') {
1970: if ($token->[1] eq 'tag') {
1971: undef($tag);
1972: $tagnum++;
1973: } elsif ($token->[1] eq 'help') {
1974: undef($in_help);
1975: }
1976: }
1977: }
1978:
1979: # parse the allows and ignore tags set to <show>no</show>
1980: foreach my $tag (@alltags) {
1981: next if (!exists($insertlist{"$tag.allow"}));
1982: my $allow = $insertlist{"$tag.allow"};
1983: foreach my $element (split(',',$allow)) {
1984: $element =~ s/(^\s*|\s*$ )//gx;
1985: if (!exists($insertlist{"$element.show"})
1986: || $insertlist{"$element.show"} ne 'no') {
1987: push(@{ $insertlist{$tag.'.which'} },$element);
1988: }
1989: }
1990: }
1991: }
1992:
1993: sub register_insert {
1994: return ®ister_insert_xml(@_);
1995: # &dump_insertlist('2');
1996: }
1997:
1998: sub dump_insertlist {
1999: my ($ext) = @_;
2000: open(XML,">/tmp/insertlist.xml.$ext");
2001: print XML ("<insertlist>");
2002: my $i=0;
2003:
2004: while (exists($insertlist{"$i.tag"})) {
2005: my $tag = $insertlist{"$i.tag"};
2006: print XML ("
2007: \t<tag name=\"$tag\">");
2008: if (defined($insertlist{"$tag.description"})) {
2009: print XML ("
2010: \t\t<description>".$insertlist{"$tag.description"}."</description>");
2011: }
2012: if (defined($insertlist{"$tag.color"})) {
2013: print XML ("
2014: \t\t<color>".$insertlist{"$tag.color"}."</color>");
2015: }
2016: if (defined($insertlist{"$tag.function"})) {
2017: print XML ("
2018: \t\t<insert_sub>".$insertlist{"$tag.function"}."</insert_sub>");
2019: }
2020: if (defined($insertlist{"$tag.show"})
2021: && $insertlist{"$tag.show"} ne 'yes') {
2022: print XML ("
2023: \t\t<show>".$insertlist{"$tag.show"}."</show>");
2024: }
2025: if (defined($insertlist{"$tag.helpfile"})) {
2026: print XML ("
2027: \t\t<help>
2028: \t\t\t<file>".$insertlist{"$tag.helpfile"}."</file>");
2029: if ($insertlist{"$tag.helpdesc"} ne '') {
2030: print XML ("
2031: \t\t\t<description>".$insertlist{"$tag.helpdesc"}."</description>");
2032: }
2033: print XML ("
2034: \t\t</help>");
2035: }
2036: if (defined($insertlist{"$tag.which"})) {
2037: print XML ("
2038: \t\t<allow>".join(',',sort(@{ $insertlist{"$tag.which"} }))."</allow>");
2039: }
2040: print XML ("
2041: \t</tag>");
2042: $i++;
2043: }
2044: print XML ("\n</insertlist>\n");
2045: close(XML);
2046: }
2047:
2048: sub description {
2049: my ($token)=@_;
2050: my $tag = &get_tag($token);
2051: return $insertlist{$tag.'.description'};
2052: }
2053:
2054: # Returns a list containing the help file, and the description
2055: sub helpinfo {
2056: my ($token)=@_;
2057: my $tag = &get_tag($token);
2058: return ($insertlist{$tag.'.helpfile'}, $insertlist{$tag.'.helpdesc'});
2059: }
2060:
2061: sub get_tag {
2062: my ($token)=@_;
2063: my $tagnum;
2064: my $tag=$token->[1];
2065: foreach my $namespace (reverse(@Apache::lonxml::namespace)) {
2066: my $testtag = $namespace.'::'.$tag;
2067: $tagnum = $insertlist{"$testtag.num"};
2068: last if (defined($tagnum));
2069: }
2070: if (!defined($tagnum)) {
2071: $tagnum = $Apache::lonxml::insertlist{"$tag.num"};
2072: }
2073: return $insertlist{"$tagnum.tag"};
2074: }
2075:
2076: 1;
2077: __END__
2078:
2079:
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