1: # The LearningOnline Network with CAPA
2: # XML Parser Module
3: #
4: # $Id: lonxml.pm,v 1.460 2007/09/12 10:58:18 foxr 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: #debugging control, to turn on debugging modify the correct handler
97: $Apache::lonxml::debug=0;
98:
99: # keeps count of the number of warnings and errors generated in a parse
100: $warningcount=0;
101: $errorcount=0;
102:
103: #path to the directory containing the file currently being processed
104: @pwd=();
105:
106: #these two are used for capturing a subset of the output for later processing,
107: #don't touch them directly use &startredirection and &endredirection
108: @outputstack = ();
109: $redirection = 0;
110:
111: #controls wheter the <import> tag actually does
112: $import = 1;
113: @extlinks=();
114:
115: # meta mode is a bit weird only some output is to be turned off
116: #<output> tag turns metamode off (defined in londefdef.pm)
117: $metamode = 0;
118:
119: # turns on and of run::evaluate actually derefencing var refs
120: $evaluate = 1;
121:
122: # data structure for eidt mode, determines what tags can go into what other tags
123: %insertlist=();
124:
125: # stores the list of active tag namespaces
126: @namespace=();
127:
128: # stores all Scrit Vars displays for later showing
129: my @script_var_displays=();
130:
131: # a pointer the the Apache request object
132: $Apache::lonxml::request='';
133:
134: # a problem number counter, and check on ether it is used
135: $Apache::lonxml::counter=1;
136: $Apache::lonxml::counter_changed=0;
137:
138: # A count of bubble lines needed for a set.. and a check on
139: # whether or not it is ever used too:
140:
141: $Apache::lonxml::bubble_line_counter = 1;
142: $Apache::lonxml::bubble_line_counter_changed = 0;
143:
144:
145: #internal check on whether to look at style defs
146: $Apache::lonxml::usestyle=1;
147:
148: #locations used to store the parameter string for style substitutions
149: $Apache::lonxml::style_values='';
150: $Apache::lonxml::style_end_values='';
151:
152: #array of ssi calls that need to occur after we are done parsing
153: @Apache::lonxml::ssi_info=();
154:
155: #should we do the postag variable interpolation
156: $Apache::lonxml::post_evaluate=1;
157:
158: #a header message to emit in the case of any generated warning or errors
159: $Apache::lonxml::warnings_error_header='';
160:
161: # Control whether or not LaTeX symbols should be substituted for their
162: # \ style equivalents...this may be turned off e.g. in an verbatim
163: # environment.
164:
165: $Apache::lonxml::substitute_LaTeX_symbols = 1; # Starts out on.
166:
167: sub enable_LaTeX_substitutions {
168: $Apache::lonxml::substitute_LaTeX_symbols = 1;
169: }
170: sub disable_LaTeX_substitutions {
171: $Apache::lonxml::substitute_LaTeX_symbols = 0;
172: }
173:
174: sub xmlend {
175: my ($target,$parser)=@_;
176: my $mode='xml';
177: my $status='OPEN';
178: if ($Apache::lonhomework::parsing_a_problem ||
179: $Apache::lonhomework::parsing_a_task ) {
180: $mode='problem';
181: $status=$Apache::inputtags::status[-1];
182: }
183: my $discussion;
184: &Apache::loncommon::get_unprocessed_cgi($ENV{'QUERY_STRING'},
185: ['LONCAPA_INTERNAL_no_discussion']);
186: if (! exists($env{'form.LONCAPA_INTERNAL_no_discussion'}) ||
187: $env{'form.LONCAPA_INTERNAL_no_discussion'} ne 'true') {
188: $discussion=&Apache::lonfeedback::list_discussion($mode,$status);
189: }
190: if ($target eq 'tex') {
191: $discussion.='<tex>\keephidden{ENDOFPROBLEM}\vskip 0.5mm\noindent\makebox[\textwidth/$number_of_columns][b]{\hrulefill}\end{document}</tex>';
192: &Apache::lonxml::newparser($parser,\$discussion,'');
193: return '';
194: }
195:
196: return $discussion;
197: }
198:
199: sub tokeninputfield {
200: my $defhost=$Apache::lonnet::perlvar{'lonHostID'};
201: $defhost=~tr/a-z/A-Z/;
202: return (<<ENDINPUTFIELD)
203: <script type="text/javascript">
204: function updatetoken() {
205: var comp=new Array;
206: var barcode=unescape(document.tokeninput.barcode.value);
207: comp=barcode.split('*');
208: if (typeof(comp[0])!="undefined") {
209: document.tokeninput.codeone.value=comp[0];
210: }
211: if (typeof(comp[1])!="undefined") {
212: document.tokeninput.codetwo.value=comp[1];
213: }
214: if (typeof(comp[2])!="undefined") {
215: comp[2]=comp[2].toUpperCase();
216: document.tokeninput.codethree.value=comp[2];
217: }
218: document.tokeninput.barcode.value='';
219: }
220: </script>
221: <form method="post" name="tokeninput">
222: <table border="2" bgcolor="#FFFFBB">
223: <tr><th>DocID Checkin</th></tr>
224: <tr><td>
225: <table>
226: <tr>
227: <td>Scan in Barcode</td>
228: <td><input type="text" size="22" name="barcode"
229: onChange="updatetoken()"/></td>
230: </tr>
231: <tr><td><i>or</i> Type in DocID</td>
232: <td>
233: <input type="text" size="5" name="codeone" />
234: <b><font size="+2">*</font></b>
235: <input type="text" size="5" name="codetwo" />
236: <b><font size="+2">*</font></b>
237: <input type="text" size="10" name="codethree" value="$defhost"
238: onChange="this.value=this.value.toUpperCase()" />
239: </td></tr>
240: </table>
241: </td></tr>
242: <tr><td><input type="submit" value="Check in DocID" /></td></tr>
243: </table>
244: </form>
245: ENDINPUTFIELD
246: }
247:
248: sub maketoken {
249: my ($symb,$tuname,$tudom,$tcrsid)=@_;
250: unless ($symb) {
251: $symb=&Apache::lonnet::symbread();
252: }
253: unless ($tuname) {
254: $tuname=$env{'user.name'};
255: $tudom=$env{'user.domain'};
256: $tcrsid=$env{'request.course.id'};
257: }
258:
259: return &Apache::lonnet::checkout($symb,$tuname,$tudom,$tcrsid);
260: }
261:
262: sub printtokenheader {
263: my ($target,$token,$tsymb,$tcrsid,$tudom,$tuname)=@_;
264: unless ($token) { return ''; }
265:
266: my ($symb,$courseid,$domain,$name) = &Apache::lonnet::whichuser();
267: unless ($tsymb) {
268: $tsymb=$symb;
269: }
270: unless ($tuname) {
271: $tuname=$name;
272: $tudom=$domain;
273: $tcrsid=$courseid;
274: }
275:
276: my $plainname=&Apache::loncommon::plainname($tuname,$tudom);
277:
278: if ($target eq 'web') {
279: my %idhash=&Apache::lonnet::idrget($tudom,($tuname));
280: return
281: '<img align="right" src="/cgi-bin/barcode.png?encode='.$token.'" />'.
282: &mt('Checked out for').' '.$plainname.
283: '<br />'.&mt('User').': '.$tuname.' at '.$tudom.
284: '<br />'.&mt('ID').': '.$idhash{$tuname}.
285: '<br />'.&mt('CourseID').': '.$tcrsid.
286: '<br />'.&mt('Course').': '.$env{'course.'.$tcrsid.'.description'}.
287: '<br />'.&mt('DocID').': '.$token.
288: '<br />'.&mt('Time').': '.&Apache::lonlocal::locallocaltime().'<hr />';
289: } else {
290: return $token;
291: }
292: }
293:
294: sub printalltags {
295: my $temp;
296: foreach $temp (sort keys %Apache::lonxml::alltags) {
297: &Apache::lonxml::debug("$temp -- ".
298: join(',',@{ $Apache::lonxml::alltags{$temp} }));
299: }
300: }
301:
302: sub xmlparse {
303: my ($request,$target,$content_file_string,$safeinit,%style_for_target) = @_;
304:
305: &setup_globals($request,$target);
306: &Apache::inputtags::initialize_inputtags();
307: &Apache::bridgetask::initialize_bridgetask();
308: &Apache::outputtags::initialize_outputtags();
309: &Apache::edit::initialize_edit();
310: &Apache::londefdef::initialize_londefdef();
311:
312: #
313: # do we have a course style file?
314: #
315:
316: if ($env{'request.course.id'} && $env{'request.state'} ne 'construct') {
317: my $bodytext=
318: $env{'course.'.$env{'request.course.id'}.'.default_xml_style'};
319: if ($bodytext) {
320: foreach my $file (split(',',$bodytext)) {
321: my $location=&Apache::lonnet::filelocation('',$file);
322: my $styletext=&Apache::lonnet::getfile($location);
323: if ($styletext ne '-1') {
324: %style_for_target = (%style_for_target,
325: &Apache::style::styleparser($target,$styletext));
326: }
327: }
328: }
329: } elsif ($env{'construct.style'}
330: && ($env{'request.state'} eq 'construct')) {
331: my $location=&Apache::lonnet::filelocation('',$env{'construct.style'});
332: my $styletext=&Apache::lonnet::getfile($location);
333: if ($styletext ne '-1') {
334: %style_for_target = (%style_for_target,
335: &Apache::style::styleparser($target,$styletext));
336: }
337: }
338: #&printalltags();
339: my @pars = ();
340: my $pwd=$env{'request.filename'};
341: $pwd =~ s:/[^/]*$::;
342: &newparser(\@pars,\$content_file_string,$pwd);
343:
344: my $safeeval = new Safe;
345: my $safehole = new Safe::Hole;
346: &init_safespace($target,$safeeval,$safehole,$safeinit);
347: #-------------------- Redefinition of the target in the case of compound target
348:
349: ($target, my @tenta) = split('&&',$target);
350:
351: my @stack = ();
352: my @parstack = ();
353: &initdepth();
354: &init_alarm();
355: my $finaloutput = &inner_xmlparse($target,\@stack,\@parstack,\@pars,
356: $safeeval,\%style_for_target,1);
357:
358: if (@stack) {
359: &warning("At end of file some tags were still left unclosed, ".
360: '<tt><'.join('></tt>, <tt><',reverse(@stack)).
361: '></tt>');
362: }
363: if ($env{'request.uri'}) {
364: &writeallows($env{'request.uri'});
365: }
366: &do_registered_ssi();
367: if ($Apache::lonxml::counter_changed) { &store_counter() }
368: if ($Apache::lonxml::bubble_line_counter_changed) {
369: &store_bubble_counter();
370: }
371:
372: &clean_safespace($safeeval);
373:
374: if (@script_var_displays) {
375: $finaloutput .= join('',@script_var_displays);
376: undef(@script_var_displays);
377: }
378:
379: if ($env{'form.return_only_error_and_warning_counts'}) {
380: return "$errorcount:$warningcount";
381: }
382: return $finaloutput;
383: }
384:
385: sub latex_special_symbols {
386: my ($string,$where)=@_;
387: #
388: # If e.g. in verbatim mode, then don't substitute.
389: # but return original string.
390: #
391: if (!($Apache::lonxml::substitute_LaTeX_symbols)) {
392: return $string;
393: }
394: if ($where eq 'header') {
395: $string =~ s/\\/\$\\backslash\$/g; # \ -> $\backslash$ per LaTex line by line pg 10.
396: $string =~ s/(\$|%|\{|\})/\\$1/g;
397: $string=&Apache::lonprintout::character_chart($string);
398: # any & or # leftover should be safe to just escape
399: $string=~s/([^\\])\&/$1\\\&/g;
400: $string=~s/([^\\])\#/$1\\\#/g;
401: $string =~ s/_/\\_/g; # _ -> \_
402: $string =~ s/\^/\\\^{}/g; # ^ -> \^{}
403: } else {
404: $string=~s/\\/\\ensuremath{\\backslash}/g;
405: $string=~s/\\\%|\%/\\\%/g;
406: $string=~s/\\{|{/\\{/g;
407: $string=~s/\\}|}/\\}/g;
408: $string=~s/\\ensuremath\\{\\backslash\\}/\\ensuremath{\\backslash}/g;
409: $string=~s/\\\$|\$/\\\$/g;
410: $string=~s/\\\_|\_/\\\_/g;
411: $string=~s/([^\\]|^)(\~|\^)/$1\\$2\\strut /g;
412: $string=~s/(>|<)/\\ensuremath\{$1\}/g; #more or less
413: $string=&Apache::lonprintout::character_chart($string);
414: # any & or # leftover should be safe to just escape
415: $string=~s/\\\&|\&/\\\&/g;
416: $string=~s/\\\#|\#/\\\#/g;
417: $string=~s/\|/\$\\mid\$/g;
418: #single { or } How to escape?
419: }
420: return $string;
421: }
422:
423: sub inner_xmlparse {
424: my ($target,$stack,$parstack,$pars,$safeeval,$style_for_target,$start)=@_;
425: my $finaloutput = '';
426: my $result;
427: my $token;
428: my $dontpop=0;
429: my $startredirection = $Apache::lonxml::redirection;
430: while ( $#$pars > -1 ) {
431: while ($token = $$pars['-1']->get_token) {
432: if (($token->[0] eq 'T') || ($token->[0] eq 'C') ) {
433: if ($metamode<1) {
434: my $text=$token->[1];
435: if ($token->[0] eq 'C' && $target eq 'tex') {
436: $text = '';
437: # $text = '%'.$text."\n";
438: }
439: $result.=$text;
440: }
441: } elsif (($token->[0] eq 'D')) {
442: if ($metamode<1 && $target eq 'web') {
443: my $text=$token->[1];
444: $result.=$text;
445: }
446: } elsif ($token->[0] eq 'PI') {
447: if ($metamode<1 && $target eq 'web') {
448: $result=$token->[2];
449: }
450: } elsif ($token->[0] eq 'S') {
451: # add tag to stack
452: push (@$stack,$token->[1]);
453: # add parameters list to another stack
454: push (@$parstack,&parstring($token));
455: &increasedepth($token);
456: if ($Apache::lonxml::usestyle &&
457: exists($$style_for_target{$token->[1]})) {
458: $Apache::lonxml::usestyle=0;
459: my $string=$$style_for_target{$token->[1]}.
460: '<LONCAPA_INTERNAL_TURN_STYLE_ON />';
461: &Apache::lonxml::newparser($pars,\$string);
462: $Apache::lonxml::style_values=$$parstack[-1];
463: $Apache::lonxml::style_end_values=$$parstack[-1];
464: } else {
465: $result = &callsub("start_$token->[1]", $target, $token, $stack,
466: $parstack, $pars, $safeeval, $style_for_target);
467: }
468: } elsif ($token->[0] eq 'E') {
469: if ($Apache::lonxml::usestyle &&
470: exists($$style_for_target{'/'."$token->[1]"})) {
471: $Apache::lonxml::usestyle=0;
472: my $string=$$style_for_target{'/'.$token->[1]}.
473: '<LONCAPA_INTERNAL_TURN_STYLE_ON end="'.$token->[1].'" />';
474: &Apache::lonxml::newparser($pars,\$string);
475: $Apache::lonxml::style_values=$Apache::lonxml::style_end_values;
476: $Apache::lonxml::style_end_values='';
477: $dontpop=1;
478: } else {
479: #clear out any tags that didn't end
480: while ($token->[1] ne $$stack['-1'] && ($#$stack > -1)) {
481: my $lasttag=$$stack[-1];
482: if ($token->[1] =~ /^\Q$lasttag\E$/i) {
483: &Apache::lonxml::warning('Using tag </'.$token->[1].'> on line '.$token->[3].' as end tag to <'.$$stack[-1].'>');
484: last;
485: } else {
486: &Apache::lonxml::warning('Found tag </'.$token->[1].'> on line '.$token->[3].' when looking for </'.$$stack[-1].'> in file');
487: &end_tag($stack,$parstack,$token);
488: }
489: }
490: $result = &callsub("end_$token->[1]", $target, $token, $stack,
491: $parstack, $pars,$safeeval, $style_for_target);
492: }
493: } else {
494: &Apache::lonxml::error("Unknown token event :$token->[0]:$token->[1]:");
495: }
496: #evaluate variable refs in result
497: if ($Apache::lonxml::post_evaluate &&$result ne "") {
498: my $extras;
499: if (!$Apache::lonxml::usestyle) {
500: $extras=$Apache::lonxml::style_values;
501: }
502: if ( $#$parstack > -1 ) {
503: $result=&Apache::run::evaluate($result,$safeeval,$extras.$$parstack[-1]);
504: } else {
505: $result= &Apache::run::evaluate($result,$safeeval,$extras);
506: }
507: }
508: $Apache::lonxml::post_evaluate=1;
509:
510: if (($token->[0] eq 'T') || ($token->[0] eq 'C') || ($token->[0] eq 'D') ) {
511: #Style file definitions should be correct
512: if ($target eq 'tex' && ($Apache::lonxml::usestyle)) {
513: $result=&latex_special_symbols($result);
514: }
515: }
516:
517: if ($Apache::lonxml::redirection) {
518: $Apache::lonxml::outputstack['-1'] .= $result;
519: } else {
520: $finaloutput.=$result;
521: }
522: $result = '';
523:
524: if ($token->[0] eq 'E' && !$dontpop) {
525: &end_tag($stack,$parstack,$token);
526: }
527: $dontpop=0;
528: }
529: if ($#$pars > -1) {
530: pop @$pars;
531: pop @Apache::lonxml::pwd;
532: }
533: }
534:
535: # if ($target eq 'meta') {
536: # $finaloutput.=&endredirection;
537: # }
538:
539: if ( $start && $target eq 'grade') { &endredirection(); }
540: if ( $Apache::lonxml::redirection > $startredirection) {
541: while ($Apache::lonxml::redirection > $startredirection) {
542: $finaloutput .= &endredirection();
543: }
544: }
545: if (($ENV{'QUERY_STRING'}) && ($target eq 'web')) {
546: $finaloutput=&afterburn($finaloutput);
547: }
548: return $finaloutput;
549: }
550:
551: ##
552: ## Looks to see if there is a subroutine defined for this tag. If so, call it,
553: ## otherwise do not call it as we do not know what it is.
554: ##
555: sub callsub {
556: my ($sub,$target,$token,$tagstack,$parstack,$parser,$safeeval,$style)=@_;
557: my $currentstring='';
558: my $nodefault;
559: {
560: my $sub1;
561: no strict 'refs';
562: my $tag=$token->[1];
563: # get utterly rid of extended html tags
564: if ($tag=~/^x\-/i) { return ''; }
565: my $space=$Apache::lonxml::alltags{$tag}[-1];
566: if (!$space) {
567: $tag=~tr/A-Z/a-z/;
568: $sub=~tr/A-Z/a-z/;
569: $space=$Apache::lonxml::alltags{$tag}[-1]
570: }
571:
572: my $deleted=0;
573: if (($token->[0] eq 'S') && ($target eq 'modified')) {
574: $deleted=&Apache::edit::handle_delete($space,$target,$token,$tagstack,
575: $parstack,$parser,$safeeval,
576: $style);
577: }
578: if (!$deleted) {
579: if ($space) {
580: #&Apache::lonxml::debug("Calling sub $sub in $space $metamode");
581: $sub1="$space\:\:$sub";
582: ($currentstring,$nodefault) = &$sub1($target,$token,$tagstack,
583: $parstack,$parser,$safeeval,
584: $style);
585: } else {
586: if ($target eq 'tex') {
587: # throw away tag name
588: return '';
589: }
590: #&Apache::lonxml::debug("NOT Calling sub $sub in $space $metamode");
591: if ($metamode <1) {
592: if (defined($token->[4]) && ($metamode < 1)) {
593: $currentstring = $token->[4];
594: } else {
595: $currentstring = $token->[2];
596: }
597: }
598: }
599: # &Apache::lonxml::debug("nodefalt:$nodefault:");
600: if ($currentstring eq '' && $nodefault eq '') {
601: if ($target eq 'edit') {
602: #&Apache::lonxml::debug("doing default edit for $token->[1]");
603: if ($token->[0] eq 'S') {
604: $currentstring = &Apache::edit::tag_start($target,$token);
605: } elsif ($token->[0] eq 'E') {
606: $currentstring = &Apache::edit::tag_end($target,$token);
607: }
608: }
609: }
610: if ($target eq 'modified' && $nodefault eq '') {
611: if ($currentstring eq '') {
612: if ($token->[0] eq 'S') {
613: $currentstring = $token->[4];
614: } elsif ($token->[0] eq 'E') {
615: $currentstring = $token->[2];
616: } else {
617: $currentstring = $token->[2];
618: }
619: }
620: if ($token->[0] eq 'S') {
621: $currentstring.=&Apache::edit::handle_insert();
622: } elsif ($token->[0] eq 'E') {
623: $currentstring.=&Apache::edit::handle_insertafter($token->[1]);
624: }
625: }
626: }
627: use strict 'refs';
628: }
629: return $currentstring;
630: }
631:
632: sub setup_globals {
633: my ($request,$target)=@_;
634: $Apache::lonxml::request=$request;
635: $errorcount=0;
636: $warningcount=0;
637: $Apache::lonxml::default_homework_loaded=0;
638: $Apache::lonxml::usestyle=1;
639: &init_counter();
640: &init_bubble_counter();
641: @Apache::lonxml::pwd=();
642: @Apache::lonxml::extlinks=();
643: @script_var_displays=();
644: @Apache::lonxml::ssi_info=();
645: $Apache::lonxml::post_evaluate=1;
646: $Apache::lonxml::warnings_error_header='';
647: $Apache::lonxml::substitute_LaTeX_symbols = 1;
648: if ($target eq 'meta') {
649: $Apache::lonxml::redirection = 0;
650: $Apache::lonxml::metamode = 1;
651: $Apache::lonxml::evaluate = 1;
652: $Apache::lonxml::import = 0;
653: } elsif ($target eq 'answer') {
654: $Apache::lonxml::redirection = 0;
655: $Apache::lonxml::metamode = 1;
656: $Apache::lonxml::evaluate = 1;
657: $Apache::lonxml::import = 1;
658: } elsif ($target eq 'grade') {
659: &startredirection(); #ended in inner_xmlparse on exit
660: $Apache::lonxml::metamode = 0;
661: $Apache::lonxml::evaluate = 1;
662: $Apache::lonxml::import = 1;
663: } elsif ($target eq 'modified') {
664: $Apache::lonxml::redirection = 0;
665: $Apache::lonxml::metamode = 0;
666: $Apache::lonxml::evaluate = 0;
667: $Apache::lonxml::import = 0;
668: } elsif ($target eq 'edit') {
669: $Apache::lonxml::redirection = 0;
670: $Apache::lonxml::metamode = 0;
671: $Apache::lonxml::evaluate = 0;
672: $Apache::lonxml::import = 0;
673: } elsif ($target eq 'analyze') {
674: $Apache::lonxml::redirection = 0;
675: $Apache::lonxml::metamode = 0;
676: $Apache::lonxml::evaluate = 1;
677: $Apache::lonxml::import = 1;
678: } else {
679: $Apache::lonxml::redirection = 0;
680: $Apache::lonxml::metamode = 0;
681: $Apache::lonxml::evaluate = 1;
682: $Apache::lonxml::import = 1;
683: }
684: }
685:
686: sub init_safespace {
687: my ($target,$safeeval,$safehole,$safeinit) = @_;
688: $safeeval->deny_only(':dangerous');
689: $safeeval->reval('use Math::Complex;');
690: $safeeval->permit_only(":default");
691: $safeeval->permit("entereval");
692: $safeeval->permit(":base_math");
693: $safeeval->permit("sort");
694: $safeeval->permit("time");
695: $safeeval->deny("rand");
696: $safeeval->deny("srand");
697: $safeeval->deny(":base_io");
698: $safehole->wrap(\&Apache::scripttag::xmlparse,$safeeval,'&xmlparse');
699: $safehole->wrap(\&Apache::outputtags::multipart,$safeeval,'&multipart');
700: $safehole->wrap(\&Apache::lonnet::EXT,$safeeval,'&EXT');
701: $safehole->wrap(\&Apache::chemresponse::chem_standard_order,$safeeval,
702: '&chem_standard_order');
703: $safehole->wrap(\&Apache::response::check_status,$safeeval,'&check_status');
704:
705: $safehole->wrap(\&Apache::lonmaxima::maxima_eval,$safeeval,'&maxima_eval');
706: $safehole->wrap(\&Apache::lonmaxima::maxima_check,$safeeval,'&maxima_check');
707: $safehole->wrap(\&Apache::lonmaxima::maxima_cas_formula_fix,$safeeval,
708: '&maxima_cas_formula_fix');
709:
710: $safehole->wrap(\&Apache::caparesponse::capa_formula_fix,$safeeval,
711: '&capa_formula_fix');
712:
713: $safehole->wrap(\&Math::Cephes::asin,$safeeval,'&asin');
714: $safehole->wrap(\&Math::Cephes::acos,$safeeval,'&acos');
715: $safehole->wrap(\&Math::Cephes::atan,$safeeval,'&atan');
716: $safehole->wrap(\&Math::Cephes::sinh,$safeeval,'&sinh');
717: $safehole->wrap(\&Math::Cephes::cosh,$safeeval,'&cosh');
718: $safehole->wrap(\&Math::Cephes::tanh,$safeeval,'&tanh');
719: $safehole->wrap(\&Math::Cephes::asinh,$safeeval,'&asinh');
720: $safehole->wrap(\&Math::Cephes::acosh,$safeeval,'&acosh');
721: $safehole->wrap(\&Math::Cephes::atanh,$safeeval,'&atanh');
722: $safehole->wrap(\&Math::Cephes::erf,$safeeval,'&erf');
723: $safehole->wrap(\&Math::Cephes::erfc,$safeeval,'&erfc');
724: $safehole->wrap(\&Math::Cephes::j0,$safeeval,'&j0');
725: $safehole->wrap(\&Math::Cephes::j1,$safeeval,'&j1');
726: $safehole->wrap(\&Math::Cephes::jn,$safeeval,'&jn');
727: $safehole->wrap(\&Math::Cephes::jv,$safeeval,'&jv');
728: $safehole->wrap(\&Math::Cephes::y0,$safeeval,'&y0');
729: $safehole->wrap(\&Math::Cephes::y1,$safeeval,'&y1');
730: $safehole->wrap(\&Math::Cephes::yn,$safeeval,'&yn');
731: $safehole->wrap(\&Math::Cephes::yv,$safeeval,'&yv');
732:
733: $safehole->wrap(\&Math::Cephes::bdtr ,$safeeval,'&bdtr' );
734: $safehole->wrap(\&Math::Cephes::bdtrc ,$safeeval,'&bdtrc' );
735: $safehole->wrap(\&Math::Cephes::bdtri ,$safeeval,'&bdtri' );
736: $safehole->wrap(\&Math::Cephes::btdtr ,$safeeval,'&btdtr' );
737: $safehole->wrap(\&Math::Cephes::chdtr ,$safeeval,'&chdtr' );
738: $safehole->wrap(\&Math::Cephes::chdtrc,$safeeval,'&chdtrc');
739: $safehole->wrap(\&Math::Cephes::chdtri,$safeeval,'&chdtri');
740: $safehole->wrap(\&Math::Cephes::fdtr ,$safeeval,'&fdtr' );
741: $safehole->wrap(\&Math::Cephes::fdtrc ,$safeeval,'&fdtrc' );
742: $safehole->wrap(\&Math::Cephes::fdtri ,$safeeval,'&fdtri' );
743: $safehole->wrap(\&Math::Cephes::gdtr ,$safeeval,'&gdtr' );
744: $safehole->wrap(\&Math::Cephes::gdtrc ,$safeeval,'&gdtrc' );
745: $safehole->wrap(\&Math::Cephes::nbdtr ,$safeeval,'&nbdtr' );
746: $safehole->wrap(\&Math::Cephes::nbdtrc,$safeeval,'&nbdtrc');
747: $safehole->wrap(\&Math::Cephes::nbdtri,$safeeval,'&nbdtri');
748: $safehole->wrap(\&Math::Cephes::ndtr ,$safeeval,'&ndtr' );
749: $safehole->wrap(\&Math::Cephes::ndtri ,$safeeval,'&ndtri' );
750: $safehole->wrap(\&Math::Cephes::pdtr ,$safeeval,'&pdtr' );
751: $safehole->wrap(\&Math::Cephes::pdtrc ,$safeeval,'&pdtrc' );
752: $safehole->wrap(\&Math::Cephes::pdtri ,$safeeval,'&pdtri' );
753: $safehole->wrap(\&Math::Cephes::stdtr ,$safeeval,'&stdtr' );
754: $safehole->wrap(\&Math::Cephes::stdtri,$safeeval,'&stdtri');
755:
756: $safehole->wrap(\&Math::Cephes::Matrix::mat,$safeeval,'&mat');
757: $safehole->wrap(\&Math::Cephes::Matrix::new,$safeeval,
758: '&Math::Cephes::Matrix::new');
759: $safehole->wrap(\&Math::Cephes::Matrix::coef,$safeeval,
760: '&Math::Cephes::Matrix::coef');
761: $safehole->wrap(\&Math::Cephes::Matrix::clr,$safeeval,
762: '&Math::Cephes::Matrix::clr');
763: $safehole->wrap(\&Math::Cephes::Matrix::add,$safeeval,
764: '&Math::Cephes::Matrix::add');
765: $safehole->wrap(\&Math::Cephes::Matrix::sub,$safeeval,
766: '&Math::Cephes::Matrix::sub');
767: $safehole->wrap(\&Math::Cephes::Matrix::mul,$safeeval,
768: '&Math::Cephes::Matrix::mul');
769: $safehole->wrap(\&Math::Cephes::Matrix::div,$safeeval,
770: '&Math::Cephes::Matrix::div');
771: $safehole->wrap(\&Math::Cephes::Matrix::inv,$safeeval,
772: '&Math::Cephes::Matrix::inv');
773: $safehole->wrap(\&Math::Cephes::Matrix::transp,$safeeval,
774: '&Math::Cephes::Matrix::transp');
775: $safehole->wrap(\&Math::Cephes::Matrix::simq,$safeeval,
776: '&Math::Cephes::Matrix::simq');
777: $safehole->wrap(\&Math::Cephes::Matrix::mat_to_vec,$safeeval,
778: '&Math::Cephes::Matrix::mat_to_vec');
779: $safehole->wrap(\&Math::Cephes::Matrix::vec_to_mat,$safeeval,
780: '&Math::Cephes::Matrix::vec_to_mat');
781: $safehole->wrap(\&Math::Cephes::Matrix::check,$safeeval,
782: '&Math::Cephes::Matrix::check');
783: $safehole->wrap(\&Math::Cephes::Matrix::check,$safeeval,
784: '&Math::Cephes::Matrix::check');
785:
786: # $safehole->wrap(\&Math::Cephes::new_fract,$safeeval,'&new_fract');
787: # $safehole->wrap(\&Math::Cephes::radd,$safeeval,'&radd');
788: # $safehole->wrap(\&Math::Cephes::rsub,$safeeval,'&rsub');
789: # $safehole->wrap(\&Math::Cephes::rmul,$safeeval,'&rmul');
790: # $safehole->wrap(\&Math::Cephes::rdiv,$safeeval,'&rdiv');
791: # $safehole->wrap(\&Math::Cephes::euclid,$safeeval,'&euclid');
792:
793: $safehole->wrap(\&Math::Random::random_beta,$safeeval,'&math_random_beta');
794: $safehole->wrap(\&Math::Random::random_chi_square,$safeeval,'&math_random_chi_square');
795: $safehole->wrap(\&Math::Random::random_exponential,$safeeval,'&math_random_exponential');
796: $safehole->wrap(\&Math::Random::random_f,$safeeval,'&math_random_f');
797: $safehole->wrap(\&Math::Random::random_gamma,$safeeval,'&math_random_gamma');
798: $safehole->wrap(\&Math::Random::random_multivariate_normal,$safeeval,'&math_random_multivariate_normal');
799: $safehole->wrap(\&Math::Random::random_multinomial,$safeeval,'&math_random_multinomial');
800: $safehole->wrap(\&Math::Random::random_noncentral_chi_square,$safeeval,'&math_random_noncentral_chi_square');
801: $safehole->wrap(\&Math::Random::random_noncentral_f,$safeeval,'&math_random_noncentral_f');
802: $safehole->wrap(\&Math::Random::random_normal,$safeeval,'&math_random_normal');
803: $safehole->wrap(\&Math::Random::random_permutation,$safeeval,'&math_random_permutation');
804: $safehole->wrap(\&Math::Random::random_permuted_index,$safeeval,'&math_random_permuted_index');
805: $safehole->wrap(\&Math::Random::random_uniform,$safeeval,'&math_random_uniform');
806: $safehole->wrap(\&Math::Random::random_poisson,$safeeval,'&math_random_poisson');
807: $safehole->wrap(\&Math::Random::random_uniform_integer,$safeeval,'&math_random_uniform_integer');
808: $safehole->wrap(\&Math::Random::random_negative_binomial,$safeeval,'&math_random_negative_binomial');
809: $safehole->wrap(\&Math::Random::random_binomial,$safeeval,'&math_random_binomial');
810: $safehole->wrap(\&Math::Random::random_seed_from_phrase,$safeeval,'&random_seed_from_phrase');
811: $safehole->wrap(\&Math::Random::random_set_seed_from_phrase,$safeeval,'&random_set_seed_from_phrase');
812: $safehole->wrap(\&Math::Random::random_get_seed,$safeeval,'&random_get_seed');
813: $safehole->wrap(\&Math::Random::random_set_seed,$safeeval,'&random_set_seed');
814: $safehole->wrap(\&Apache::loncommon::languages,$safeeval,'&languages');
815: $safehole->wrap(\&Apache::lonxml::error,$safeeval,'&LONCAPA_INTERNAL_ERROR');
816: $safehole->wrap(\&Apache::lonxml::debug,$safeeval,'&LONCAPA_INTERNAL_DEBUG');
817: $safehole->wrap(\&Apache::lonnet::logthis,$safeeval,'&LONCAPA_INTERNAL_LOGTHIS');
818: $safehole->wrap(\&Apache::inputtags::finalizeawards,$safeeval,'&LONCAPA_INTERNAL_FINALIZEAWARDS');
819: $safehole->wrap(\&Apache::caparesponse::get_sigrange,$safeeval,'&LONCAPA_INTERNAL_get_sigrange');
820: # use Data::Dumper;
821: # $safehole->wrap(\&Data::Dumper::Dumper,$safeeval,'&LONCAPA_INTERNAL_Dumper');
822: #need to inspect this class of ops
823: # $safeeval->deny(":base_orig");
824: $safeeval->permit("require");
825: $safeinit .= ';$external::target="'.$target.'";';
826: &Apache::run::run($safeinit,$safeeval);
827: &initialize_rndseed($safeeval);
828: }
829:
830: sub clean_safespace {
831: my ($safeeval) = @_;
832: delete_package_recurse($safeeval->{Root});
833: }
834:
835: sub delete_package_recurse {
836: my ($package) = @_;
837: my @subp;
838: {
839: no strict 'refs';
840: while (my ($key,$val) = each(%{*{"$package\::"}})) {
841: if (!defined($val)) { next; }
842: local (*ENTRY) = $val;
843: if (defined *ENTRY{HASH} && $key =~ /::$/ &&
844: $key ne "main::" && $key ne "<none>::")
845: {
846: my ($p) = $package ne "main" ? "$package\::" : "";
847: ($p .= $key) =~ s/::$//;
848: push(@subp,$p);
849: }
850: }
851: }
852: foreach my $p (@subp) {
853: delete_package_recurse($p);
854: }
855: Symbol::delete_package($package);
856: }
857:
858: sub initialize_rndseed {
859: my ($safeeval)=@_;
860: my $rndseed;
861: my ($symb,$courseid,$domain,$name) = &Apache::lonnet::whichuser();
862: $rndseed=&Apache::lonnet::rndseed($symb,$courseid,$domain,$name);
863: my $safeinit = '$external::randomseed="'.$rndseed.'";';
864: &Apache::lonxml::debug("Setting rndseed to $rndseed");
865: &Apache::run::run($safeinit,$safeeval);
866: }
867:
868: sub default_homework_load {
869: my ($safeeval)=@_;
870: &Apache::lonxml::debug('Loading default_homework');
871: my $default=&Apache::lonnet::getfile('/home/httpd/html/res/adm/includes/default_homework.lcpm');
872: if ($default eq -1) {
873: &Apache::lonxml::error("<b>Unable to find <i>default_homework.lcpm</i></b>");
874: } else {
875: &Apache::run::run($default,$safeeval);
876: $Apache::lonxml::default_homework_loaded=1;
877: }
878: }
879:
880: {
881: my $alarm_depth;
882: sub init_alarm {
883: alarm(0);
884: $alarm_depth=0;
885: }
886:
887: sub start_alarm {
888: if ($alarm_depth<1) {
889: my $old=alarm($Apache::lonnet::perlvar{'lonScriptTimeout'});
890: if ($old) {
891: &Apache::lonxml::error("Cancelled an alarm of $old, this shouldn't occur.");
892: }
893: }
894: $alarm_depth++;
895: }
896:
897: sub end_alarm {
898: $alarm_depth--;
899: if ($alarm_depth<1) { alarm(0); }
900: }
901: }
902: my $metamode_was;
903: sub startredirection {
904: if (!$Apache::lonxml::redirection) {
905: $metamode_was=$Apache::lonxml::metamode;
906: }
907: $Apache::lonxml::metamode=0;
908: $Apache::lonxml::redirection++;
909: push (@Apache::lonxml::outputstack, '');
910: }
911:
912: sub endredirection {
913: if (!$Apache::lonxml::redirection) {
914: &Apache::lonxml::error("Endredirection was called before a startredirection, perhaps you have unbalanced tags. Some debugging information:".join ":",caller);
915: return '';
916: }
917: $Apache::lonxml::redirection--;
918: if (!$Apache::lonxml::redirection) {
919: $Apache::lonxml::metamode=$metamode_was;
920: }
921: pop @Apache::lonxml::outputstack;
922: }
923: sub in_redirection {
924: return ($Apache::lonxml::redirection > 0)
925: }
926:
927: sub end_tag {
928: my ($tagstack,$parstack,$token)=@_;
929: pop(@$tagstack);
930: pop(@$parstack);
931: &decreasedepth($token);
932: }
933:
934: sub initdepth {
935: @Apache::lonxml::depthcounter=();
936: undef($Apache::lonxml::last_depth_count);
937: }
938:
939:
940: my @timers;
941: my $lasttime;
942: # @Apache::lonxml::depthcounter -> count of tags that exist so
943: # far at each level
944: # $Apache::lonxml::last_depth_count -> when ascending, need to
945: # remember the count for the level below the current level (for
946: # example going from 1_2 -> 1 -> 1_3 need to remember the 2 )
947:
948: sub increasedepth {
949: my ($token) = @_;
950: push(@Apache::lonxml::depthcounter,$Apache::lonxml::last_depth_count+1);
951: undef($Apache::lonxml::last_depth_count);
952: my $time;
953: if ($Apache::lonxml::debug eq "1") {
954: push(@timers,[&gettimeofday()]);
955: $time=&tv_interval($lasttime);
956: $lasttime=[&gettimeofday()];
957: }
958: my $spacing=' 'x($#Apache::lonxml::depthcounter);
959: $Apache::lonxml::curdepth=join('_',@Apache::lonxml::depthcounter);
960: # &Apache::lonxml::debug("s$spacing$Apache::lonxml::depth : $Apache::lonxml::olddepth : $Apache::lonxml::curdepth : $token->[1] : $time");
961: #print "<br />s $Apache::lonxml::depth : $Apache::lonxml::olddepth : $curdepth : $token->[1]\n";
962: }
963:
964: sub decreasedepth {
965: my ($token) = @_;
966: if ( $#Apache::lonxml::depthcounter == -1) {
967: &Apache::lonxml::warning(&mt("Missing tags, unable to properly run file."));
968: }
969: $Apache::lonxml::last_depth_count = pop(@Apache::lonxml::depthcounter);
970:
971: my ($timer,$time);
972: if ($Apache::lonxml::debug eq "1") {
973: $timer=pop(@timers);
974: $time=&tv_interval($lasttime);
975: $lasttime=[&gettimeofday()];
976: }
977: my $spacing=' 'x($#Apache::lonxml::depthcounter);
978: $Apache::lonxml::curdepth = join('_',@Apache::lonxml::depthcounter);
979: # &Apache::lonxml::debug("e$spacing$Apache::lonxml::depth : $Apache::lonxml::olddepth : $Apache::lonxml::curdepth : $token->[1] : $time : ".&tv_interval($timer));
980: #print "<br />e $Apache::lonxml::depth : $Apache::lonxml::olddepth : $token->[1] : $curdepth\n";
981: }
982:
983: sub get_id {
984: my ($parstack,$safeeval)=@_;
985: my $id= &Apache::lonxml::get_param('id',$parstack,$safeeval);
986: if ($env{'request.state'} eq 'construct' && $id =~ /([._]|[^\w\d\s[:punct:]])/) {
987: &error(&mt("ID "[_1]" contains invalid characters, IDs are only allowed to contain letters, numbers, spaces and -",'<tt>'.$id.'</tt>'));
988: }
989: if ($id =~ /^\s*$/) { $id = $Apache::lonxml::curdepth; }
990: return $id;
991: }
992:
993: sub get_all_text_unbalanced {
994: #there is a copy of this in lonpublisher.pm
995: my($tag,$pars)= @_;
996: my $token;
997: my $result='';
998: $tag='<'.$tag.'>';
999: while ($token = $$pars[-1]->get_token) {
1000: if (($token->[0] eq 'T')||($token->[0] eq 'C')||($token->[0] eq 'D')) {
1001: if ($token->[0] eq 'T' && $token->[2]) {
1002: $result.='<![CDATA['.$token->[1].']]>';
1003: } else {
1004: $result.=$token->[1];
1005: }
1006: } elsif ($token->[0] eq 'PI') {
1007: $result.=$token->[2];
1008: } elsif ($token->[0] eq 'S') {
1009: $result.=$token->[4];
1010: } elsif ($token->[0] eq 'E') {
1011: $result.=$token->[2];
1012: }
1013: if ($result =~ /\Q$tag\E/is) {
1014: ($result,my $redo)=$result =~ /(.*)\Q$tag\E(.*)/is;
1015: #&Apache::lonxml::debug('Got a winner with leftovers ::'.$2);
1016: #&Apache::lonxml::debug('Result is :'.$1);
1017: $redo=$tag.$redo;
1018: &Apache::lonxml::newparser($pars,\$redo);
1019: last;
1020: }
1021: }
1022: return $result
1023: }
1024:
1025:
1026: =pod
1027:
1028: For bubble grading mode and exam bubble printing mode, the tracking of
1029: the current 'bubble line number' is stored in the %env element
1030: 'form.bubble_line_counter', and is modifed and handled by
1031: the following routines.
1032:
1033: The value of it is stored in $Apache:lonxml::bubble_line_counter when
1034: live and stored back to env after done.
1035:
1036: =item &increment_bubble_counter($increment)
1037:
1038: Increments the bubble line counter by the optional value
1039: $increment (defaults to 1).
1040:
1041: 'bad increments' are also treated as an increment of 1.
1042: ('bad' means <=0).
1043:
1044: =cut
1045:
1046: sub increment_bubble_counter {
1047: my ($increment) = @_;
1048: if (!defined($increment) || $increment le 0) {
1049: $increment = 1;
1050: }
1051: $Apache::lonxml::bubble_line_counter += $increment;
1052: $Apache::lonxml::bubble_line_counter_changed = 1;
1053: }
1054: =pod
1055:
1056: =item &init_bubble_counter
1057:
1058: Initialize the internal counter to the env. variable
1059: or 1 if we are inconstruction space, or if the env var
1060: is not defined.
1061:
1062: =cut
1063:
1064: sub init_bubble_counter {
1065: if ($env{'request.state'} eq 'construct') {
1066: $Apache::lonxml::bubble_line_counter = 1;
1067: $Apache::lonxml::bubble_line_counter_changed = 1;
1068: } elsif (defined($env{'form.bubble_line_counter'})) {
1069: $Apache::lonxml::bubble_line_counter =
1070: $env{'form.bubble_line_counter'};
1071: $Aapche::lonxml::bubble_line_counter_changed = 0;
1072: } else {
1073: $Apache::lonxml::bubble_line_counter = 1;
1074: $Apache::lonxml::bubble_line_counter_changed = 1;
1075: }
1076:
1077: }
1078:
1079: =pod
1080:
1081: =item store_bubble_counter;
1082:
1083: Store the bubble line counter in its env var. The changed flag
1084: is reset indicating the env is up to date with respect to the
1085: local variable.
1086: =cut
1087:
1088: sub store_bubble_counter {
1089: &Apache::lonnet::appenv(('form.bubble.counter' =>
1090: $Apache::lonxml::bubble_line_counter));
1091: $Apache::lonnet::bubble_line_counter_changed = 0;
1092:
1093: return '';
1094: }
1095:
1096: =pod
1097:
1098: The next set of subs allow a single level of save/restore for the
1099: bubble_line_counter.
1100:
1101: =cut
1102:
1103: {
1104: my $bubble_counter_state;
1105:
1106: sub clear_bubble_counter {
1107: undef($bubble_counter_state);
1108: &Apache::lonnet::delenv('form.bubble_line_counter');
1109: &Apache::lonxml::init_bubble_counter();
1110: &Apache::lonxml::store_bubble_counter();
1111: }
1112:
1113: sub remember_bubble_counter {
1114: &Apache::lonnet::transfer_profile_to_env(undef,undef, 1);
1115: $bubble_counter_state = $env{'form.bubble_line_counter'};
1116: }
1117:
1118: sub restore_bubble_counter {
1119: if (defined($bubble_counter_state)) {
1120: &Apache::lonnet::appenv(('form.bubble_line_counter' =>
1121: $bubble_counter_state));
1122: }
1123: }
1124:
1125: sub get_bubble_counter {
1126: if ($Apache::lonxml::bubble_line_counter_changed) {
1127: &store_bubble_counter();
1128: }
1129: &Apache::lonnet::transfer_profile_to_env(undef, undef, 1);
1130: return $env{'form.bubble_line_counter'};
1131: }
1132: }
1133:
1134: =pod
1135:
1136: For bubble grading mode and exam bubble printing mode, the tracking of
1137: the current 'bubble line number' is stored in the %env element
1138: 'form.counter', and is modifed and handled by the following routines.
1139:
1140: The value of it is stored in $Apache:lonxml::counter when live and
1141: stored back to env after done.
1142:
1143: =item &increment_counter($increment);
1144:
1145: Increments the internal counter environment variable a specified amount
1146:
1147: Optional Arguments:
1148: $increment - amount to increment by (defaults to 1)
1149:
1150: =cut
1151:
1152: sub increment_counter {
1153: my ($increment) = @_;
1154: if (defined($increment) && $increment gt 0) {
1155: $Apache::lonxml::counter+=$increment;
1156: } else {
1157: $Apache::lonxml::counter++;
1158: }
1159: $Apache::lonxml::counter_changed=1;
1160: }
1161:
1162: =pod
1163:
1164: =item &init_counter;
1165:
1166: Initialize the internal counter environment variable
1167:
1168: =cut
1169:
1170: sub init_counter {
1171: if ($env{'request.state'} eq 'construct') {
1172: $Apache::lonxml::counter=1;
1173: $Apache::lonxml::counter_changed=1;
1174: } elsif (defined($env{'form.counter'})) {
1175: $Apache::lonxml::counter=$env{'form.counter'};
1176: $Apache::lonxml::counter_changed=0;
1177: } else {
1178: $Apache::lonxml::counter=1;
1179: $Apache::lonxml::counter_changed=1;
1180: }
1181: }
1182:
1183: sub store_counter {
1184: &Apache::lonnet::appenv(('form.counter' => $Apache::lonxml::counter));
1185: $Apache::lonxml::counter_changed=0;
1186: return '';
1187: }
1188:
1189: {
1190: my $state;
1191: sub clear_problem_counter {
1192: undef($state);
1193: &Apache::lonnet::delenv('form.counter');
1194: &Apache::lonxml::init_counter();
1195: &Apache::lonxml::store_counter();
1196: }
1197:
1198: sub remember_problem_counter {
1199: &Apache::lonnet::transfer_profile_to_env(undef,undef,1);
1200: $state = $env{'form.counter'};
1201: }
1202:
1203: sub restore_problem_counter {
1204: if (defined($state)) {
1205: &Apache::lonnet::appenv(('form.counter' => $state));
1206: }
1207: }
1208:
1209: sub get_problem_counter {
1210: if ($Apache::lonxml::counter_changed) { &store_counter() }
1211: &Apache::lonnet::transfer_profile_to_env(undef,undef,1);
1212: return $env{'form.counter'};
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)=@_;
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: my $addbuttons=&Apache::lonhtmlcommon::htmlareaaddbuttons();
1487: $initialize=&Apache::lonhtmlcommon::spellheader();
1488: if ($filetype eq 'html'
1489: && (!&Apache::lonhtmlcommon::htmlareablocked() &&
1490: &Apache::lonhtmlcommon::htmlareabrowser())) {
1491: $textarea_id .= '_htmlarea';
1492: $initialize.=(<<FULLPAGE);
1493: <script type="text/javascript">
1494: $addbuttons
1495:
1496: HTMLArea.loadPlugin("FullPage");
1497:
1498: function initDocument() {
1499: var editor=new HTMLArea("filecont",config);
1500: editor.registerPlugin(FullPage);
1501: editor.generate();
1502: setTimeout(
1503: function () {
1504: HTMLArea._addEvents(editor._doc,
1505: ["keypress","mousedown"], unClean);
1506: editor._iframe.id = '$textarea_id';
1507: resize_textarea('$textarea_id','LC_aftertextarea');
1508: },300);
1509: }
1510: </script>
1511: FULLPAGE
1512: } else {
1513: $initialize.=(<<FULLPAGE);
1514: <script type="text/javascript">
1515: $addbuttons
1516: function initDocument() {
1517: resize_textarea('$textarea_id','LC_aftertextarea');
1518: }
1519: </script>
1520: FULLPAGE
1521: }
1522:
1523: $add_to_onload = 'initDocument();';
1524: $add_to_onresize = "resize_textarea('$textarea_id','LC_aftertextarea');";
1525:
1526: if ($filetype eq 'html') {
1527: $xml_help=&Apache::loncommon::helpLatexCheatsheet();
1528: }
1529:
1530: my $cleanbut = '';
1531:
1532: my $titledisplay=&display_title();
1533: my %lt=&Apache::lonlocal::texthash('st' => 'Save and Edit',
1534: 'vi' => 'Save and View',
1535: 'dv' => 'Discard Edits and View',
1536: 'un' => 'undo',
1537: 'ed' => 'Edit');
1538: my $buttons=(<<BUTTONS);
1539: $cleanbut
1540: <input type="submit" name="discardview" accesskey="d" value="$lt{'dv'}" />
1541: <input type="submit" name="Undo" accesskey="u" value="$lt{'un'}" /><hr />
1542: <input type="submit" name="savethisfile" accesskey="s" value="$lt{'st'}" />
1543: <input type="submit" name="viewmode" accesskey="v" value="$lt{'vi'}" />
1544: BUTTONS
1545: $buttons.=&Apache::lonhtmlcommon::spelllink('xmledit','filecont');
1546: my $textarea_events = &Apache::edit::element_change_detection();
1547: my $form_events = &Apache::edit::form_change_detection();
1548: my $editfooter=(<<ENDFOOTER);
1549: $initialize
1550: <hr />
1551: <a name="editsection" />
1552: <form $form_events method="post" name="xmledit">
1553: $xml_help
1554: <input type="hidden" name="editmode" value="$lt{'ed'}" />
1555: $buttons<br />
1556: <textarea $textarea_events style="width:100%" cols="80" rows="44" name="filecont" id="filecont">$filecontents</textarea>
1557: <div id="LC_aftertextarea">
1558: <br />$buttons
1559: <br />
1560: $titledisplay
1561: </div>
1562: </form>
1563: </body>
1564: ENDFOOTER
1565: return ($editfooter,$add_to_onload,$add_to_onresize);;
1566: }
1567:
1568: sub get_target {
1569: my $viewgrades=&Apache::lonnet::allowed('vgr',$env{'request.course.id'});
1570: if ( $env{'request.state'} eq 'published') {
1571: if ( defined($env{'form.grade_target'})
1572: && ($viewgrades == 'F' )) {
1573: return ($env{'form.grade_target'});
1574: } elsif (defined($env{'form.grade_target'})) {
1575: if (($env{'form.grade_target'} eq 'web') ||
1576: ($env{'form.grade_target'} eq 'tex') ) {
1577: return $env{'form.grade_target'}
1578: } else {
1579: return 'web';
1580: }
1581: } else {
1582: return 'web';
1583: }
1584: } elsif ($env{'request.state'} eq 'construct') {
1585: if ( defined($env{'form.grade_target'})) {
1586: return ($env{'form.grade_target'});
1587: } else {
1588: return 'web';
1589: }
1590: } else {
1591: return 'web';
1592: }
1593: }
1594:
1595: sub handler {
1596: my $request=shift;
1597:
1598: my $target=&get_target();
1599:
1600: $Apache::lonxml::debug=$env{'user.debug'};
1601:
1602: &Apache::loncommon::content_type($request,'text/html');
1603: &Apache::loncommon::no_cache($request);
1604: if ($env{'request.state'} eq 'published') {
1605: $request->set_last_modified(&Apache::lonnet::metadata($request->uri,
1606: 'lastrevisiondate'));
1607: }
1608: $request->send_http_header;
1609:
1610: return OK if $request->header_only;
1611:
1612:
1613: my $file=&Apache::lonnet::filelocation("",$request->uri);
1614: my $filetype;
1615: if ($file =~ /\.sty$/) {
1616: $filetype='sty';
1617: } else {
1618: $filetype='html';
1619: }
1620: #
1621: # Edit action? Save file.
1622: #
1623: if (!($env{'request.state'} eq 'published')) {
1624: if ($env{'form.savethisfile'} || $env{'form.viewmode'} || $env{'form.Undo'}) {
1625: my $html_file=&Apache::lonnet::getfile($file);
1626: my $error = &Apache::lonhomework::handle_save_or_undo($request, \$html_file, \$env{'form.filecont'});
1627: }
1628: }
1629: my %mystyle;
1630: my $result = '';
1631: my $filecontents=&Apache::lonnet::getfile($file);
1632: if ($filecontents eq -1) {
1633: my $start_page=&Apache::loncommon::start_page('File Error');
1634: my $end_page=&Apache::loncommon::end_page();
1635: my $fnf=&mt('File not found');
1636: $result=(<<ENDNOTFOUND);
1637: $start_page
1638: <b>$fnf: $file</b>
1639: $end_page
1640: ENDNOTFOUND
1641: $filecontents='';
1642: if ($env{'request.state'} ne 'published') {
1643: if ($filetype eq 'sty') {
1644: $filecontents=&createnewsty();
1645: } else {
1646: $filecontents=&createnewhtml();
1647: }
1648: $env{'form.editmode'}='Edit'; #force edit mode
1649: }
1650: } else {
1651: unless ($env{'request.state'} eq 'published') {
1652: if ($filecontents=~/BEGIN LON-CAPA Internal/) {
1653: &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.'));
1654: }
1655: #
1656: # we are in construction space, see if edit mode forced
1657: &Apache::loncommon::get_unprocessed_cgi($ENV{'QUERY_STRING'},
1658: ['editmode']);
1659: }
1660: if (!$env{'form.editmode'} || $env{'form.viewmode'} || $env{'form.discardview'}) {
1661: &Apache::structuretags::reset_problem_globals();
1662: $result = &Apache::lonxml::xmlparse($request,$target,$filecontents,
1663: '',%mystyle);
1664: # .html files may contain <problem> or <Task> need to clean
1665: # up if it did
1666: &Apache::structuretags::reset_problem_globals();
1667: &Apache::lonhomework::finished_parsing();
1668: &Apache::loncommon::get_unprocessed_cgi($ENV{'QUERY_STRING'},
1669: ['rawmode']);
1670: if ($env{'form.rawmode'}) { $result = $filecontents; }
1671: if ($filetype eq 'sty') {
1672: my $controls =
1673: ($env{'request.state'} eq 'construct') ? &Apache::londefdef::edit_controls()
1674: : '';
1675: my %options = ('bgcolor' => '#FFFFFF');
1676: $result =
1677: &Apache::loncommon::start_page(undef,undef,\%options).
1678: $controls.
1679: $result.
1680: &Apache::loncommon::end_page();
1681: }
1682: }
1683: }
1684:
1685: #
1686: # Edit action? Insert editing commands
1687: #
1688: unless ($env{'request.state'} eq 'published') {
1689: if ($env{'form.editmode'} && (!($env{'form.viewmode'})) && (!($env{'form.discardview'})))
1690: {
1691: my ($edit_info, $add_to_onload, $add_to_onresize)=
1692: &inserteditinfo($filecontents,$filetype);
1693:
1694: my $displayfile=$request->uri;
1695: $displayfile=~s/^\/[^\/]*//;
1696: my %options =
1697: ('add_entries' =>
1698: {'onresize' => $add_to_onresize,
1699: 'onload' => $add_to_onload, });
1700:
1701: if ($env{'environment.remote'} ne 'off') {
1702: $options{'bgcolor'} = '#FFFFFF';
1703: $options{'only_body'} = 1;
1704: }
1705: my $js =
1706: &Apache::edit::js_change_detection().
1707: &Apache::loncommon::resize_textarea_js();
1708: my $start_page = &Apache::loncommon::start_page(undef,$js,
1709: \%options);
1710: $result=$start_page.
1711: &Apache::lonxml::message_location().'<h3>'.
1712: $displayfile.
1713: '</h3>'.
1714: $edit_info.
1715: &Apache::loncommon::end_page();
1716: }
1717: }
1718: if ($filetype eq 'html') { &writeallows($request->uri); }
1719:
1720: &Apache::lonxml::add_messages(\$result);
1721: $request->print($result);
1722:
1723: return OK;
1724: }
1725:
1726: sub display_title {
1727: my $result;
1728: if ($env{'request.state'} eq 'construct') {
1729: my $title=&Apache::lonnet::gettitle();
1730: if (!defined($title) || $title eq '') {
1731: $title = $env{'request.filename'};
1732: $title = substr($title, rindex($title, '/') + 1);
1733: }
1734: $result = "<script type='text/javascript'>top.document.title = '$title - LON-CAPA Construction Space';</script>";
1735: }
1736: return $result;
1737: }
1738:
1739: sub debug {
1740: if ($Apache::lonxml::debug eq "1") {
1741: $|=1;
1742: my $request=$Apache::lonxml::request;
1743: if (!$request) {
1744: eval { $request=Apache->request; };
1745: }
1746: if (!$request) {
1747: eval { $request=Apache2::RequestUtil->request; };
1748: }
1749: $request->print('<font size="-2"><pre>DEBUG:'.&HTML::Entities::encode($_[0],'<>&"')."</pre></font>\n");
1750: #&Apache::lonnet::logthis($_[0]);
1751: }
1752: }
1753:
1754: sub show_error_warn_msg {
1755: if ($env{'request.filename'} eq '/home/httpd/html/res/lib/templates/simpleproblem.problem' &&
1756: &Apache::lonnet::allowed('mdc',$env{'request.course.id'})) {
1757: return 1;
1758: }
1759: return (($Apache::lonxml::debug eq 1) ||
1760: ($env{'request.state'} eq 'construct') ||
1761: ($Apache::lonhomework::browse eq 'F'
1762: &&
1763: $env{'form.show_errors'} eq 'on'));
1764: }
1765:
1766: sub error {
1767: my @errors = @_;
1768:
1769: $errorcount++;
1770:
1771: if (defined($Apache::inputtags::part)) {
1772: if ( @Apache::inputtags::response ) {
1773: push(@errors,
1774: &mt("This error occurred while processing response [_1] in part [_2]",
1775: $Apache::inputtags::response[-1],
1776: $Apache::inputtags::part));
1777: } else {
1778: push(@errors,
1779: &mt("This error occurred while processing part [_1]",
1780: $Apache::inputtags::part));
1781: }
1782: }
1783:
1784: if ( &show_error_warn_msg() ) {
1785: # If printing in construction space, put the error inside <pre></pre>
1786: push(@Apache::lonxml::error_messages,
1787: $Apache::lonxml::warnings_error_header.
1788: "<b>ERROR:</b>".join("<br />\n",@errors)."<br />\n");
1789: $Apache::lonxml::warnings_error_header='';
1790: } else {
1791: my $errormsg;
1792: my ($symb)=&Apache::lonnet::symbread();
1793: if ( !$symb ) {
1794: #public or browsers
1795: $errormsg=&mt("An error occured while processing this resource. The author has been notified.");
1796: }
1797: my $host=$Apache::lonnet::perlvar{'lonHostID'};
1798: push(@errors, "The error occurred on host <tt>$host</tt>");
1799:
1800: my $msg = join('<br />', @errors);
1801:
1802: #notify author
1803: &Apache::lonmsg::author_res_msg($env{'request.filename'},$msg);
1804: #notify course
1805: if ( $symb && $env{'request.course.id'} ) {
1806: my $cnum=$env{'course.'.$env{'request.course.id'}.'.num'};
1807: my $cdom=$env{'course.'.$env{'request.course.id'}.'.domain'};
1808: my (undef,%users)=&Apache::lonmsg::decide_receiver(undef,0,1,1,1);
1809: my $declutter=&Apache::lonnet::declutter($env{'request.filename'});
1810: my $baseurl = &Apache::lonnet::clutter($declutter);
1811: my @userlist;
1812: foreach (keys %users) {
1813: my ($user,$domain) = split(/:/, $_);
1814: push(@userlist,"$user\@$domain");
1815: my $key=$declutter.'_'.$user.'_'.$domain;
1816: my %lastnotified=&Apache::lonnet::get('nohist_xmlerrornotifications',
1817: [$key],
1818: $cdom,$cnum);
1819: my $now=time;
1820: if ($now-$lastnotified{$key}>86400) {
1821: my $title = &Apache::lonnet::gettitle($symb);
1822: my $sentmessage;
1823: &Apache::lonmsg::user_normal_msg($user,$domain,
1824: "Error [$title]",$msg,'',$baseurl,'','',
1825: \$sentmessage,$symb,$title,1);
1826: &Apache::lonnet::put('nohist_xmlerrornotifications',
1827: {$key => $now},
1828: $cdom,$cnum);
1829: }
1830: }
1831: if ($env{'request.role.adv'}) {
1832: $errormsg=&mt("An error occured while processing this resource. The course personnel ([_1]) and the author have been notified.",join(', ',@userlist));
1833: } else {
1834: $errormsg=&mt("An error occured while processing this resource. The instructor has been notified.");
1835: }
1836: }
1837: push(@Apache::lonxml::error_messages,"<b>$errormsg</b> <br />");
1838: }
1839: }
1840:
1841: sub warning {
1842: $warningcount++;
1843:
1844: if ($env{'form.grade_target'} ne 'tex') {
1845: if ( &show_error_warn_msg() ) {
1846: push(@Apache::lonxml::warning_messages,
1847: $Apache::lonxml::warnings_error_header.
1848: "<b>W</b>ARNING<b>:</b>".join('<br />',@_)."<br />\n");
1849: $Apache::lonxml::warnings_error_header='';
1850: }
1851: }
1852: }
1853:
1854: sub info {
1855: if ($env{'form.grade_target'} ne 'tex'
1856: && $env{'request.state'} eq 'construct') {
1857: push(@Apache::lonxml::info_messages,join('<br />',@_)."<br />\n");
1858: }
1859: }
1860:
1861: sub message_location {
1862: return '__LONCAPA_INTERNAL_MESSAGE_LOCATION__';
1863: }
1864:
1865: sub add_messages {
1866: my ($msg)=@_;
1867: my $result=join(' ',
1868: @Apache::lonxml::info_messages,
1869: @Apache::lonxml::error_messages,
1870: @Apache::lonxml::warning_messages);
1871: undef(@Apache::lonxml::info_messages);
1872: undef(@Apache::lonxml::error_messages);
1873: undef(@Apache::lonxml::warning_messages);
1874: $$msg=~s/__LONCAPA_INTERNAL_MESSAGE_LOCATION__/$result/;
1875: $$msg=~s/__LONCAPA_INTERNAL_MESSAGE_LOCATION__//g;
1876: }
1877:
1878: sub get_param {
1879: my ($param,$parstack,$safeeval,$context,$case_insensitive) = @_;
1880: if ( ! $context ) { $context = -1; }
1881: my $args ='';
1882: if ( $#$parstack > (-2-$context) ) { $args=$$parstack[$context]; }
1883: if ( ! $Apache::lonxml::usestyle ) {
1884: $args=$Apache::lonxml::style_values.$args;
1885: }
1886: if ( ! $args ) { return undef; }
1887: if ( $case_insensitive ) {
1888: if ($args =~ s/(my (?:.*))(\$\Q$param\E[,\)])/$1.lc($2)/ei) {
1889: return &Apache::run::run("{$args;".'return $'.$param.'}',
1890: $safeeval); #'
1891: } else {
1892: return undef;
1893: }
1894: } else {
1895: if ( $args =~ /my .*\$\Q$param\E[,\)]/ ) {
1896: return &Apache::run::run("{$args;".'return $'.$param.'}',
1897: $safeeval); #'
1898: } else {
1899: return undef;
1900: }
1901: }
1902: }
1903:
1904: sub get_param_var {
1905: my ($param,$parstack,$safeeval,$context,$case_insensitive) = @_;
1906: if ( ! $context ) { $context = -1; }
1907: my $args ='';
1908: if ( $#$parstack > (-2-$context) ) { $args=$$parstack[$context]; }
1909: if ( ! $Apache::lonxml::usestyle ) {
1910: $args=$Apache::lonxml::style_values.$args;
1911: }
1912: &Apache::lonxml::debug("Args are $args param is $param");
1913: if ($case_insensitive) {
1914: if (! ($args=~s/(my (?:.*))(\$\Q$param\E[,\)])/$1.lc($2)/ei)) {
1915: return undef;
1916: }
1917: } elsif ( $args !~ /my .*\$\Q$param\E[,\)]/ ) { return undef; }
1918: my $value=&Apache::run::run("{$args;".'return $'.$param.'}',$safeeval); #'
1919: &Apache::lonxml::debug("first run is $value");
1920: if ($value =~ /^[\$\@\%][a-zA-Z_]\w*$/) {
1921: &Apache::lonxml::debug("doing second");
1922: my @result=&Apache::run::run("return $value",$safeeval,1);
1923: if (!defined($result[0])) {
1924: return $value
1925: } else {
1926: if (wantarray) { return @result; } else { return $result[0]; }
1927: }
1928: } else {
1929: return $value;
1930: }
1931: }
1932:
1933: sub register_insert_xml {
1934: my $parser = HTML::LCParser->new($Apache::lonnet::perlvar{'lonTabDir'}
1935: .'/insertlist.xml');
1936: my ($tagnum,$in_help)=(0,0);
1937: my @alltags;
1938: my $tag;
1939: while (my $token = $parser->get_token()) {
1940: if ($token->[0] eq 'S') {
1941: my $key;
1942: if ($token->[1] eq 'tag') {
1943: $tag = $token->[2]{'name'};
1944: $insertlist{"$tagnum.tag"} = $tag;
1945: $insertlist{"$tag.num"} = $tagnum;
1946: push(@alltags,$tag);
1947: } elsif ($in_help && $token->[1] eq 'file') {
1948: $key = $tag.'.helpfile';
1949: } elsif ($in_help && $token->[1] eq 'description') {
1950: $key = $tag.'.helpdesc';
1951: } elsif ($token->[1] eq 'description' ||
1952: $token->[1] eq 'color' ||
1953: $token->[1] eq 'show' ) {
1954: $key = $tag.'.'.$token->[1];
1955: } elsif ($token->[1] eq 'insert_sub') {
1956: $key = $tag.'.function';
1957: } elsif ($token->[1] eq 'help') {
1958: $in_help=1;
1959: } elsif ($token->[1] eq 'allow') {
1960: $key = $tag.'.allow';
1961: }
1962: if (defined($key)) {
1963: $insertlist{$key} = $parser->get_text();
1964: $insertlist{$key} =~ s/(^\s*|\s*$ )//gx;
1965: }
1966: } elsif ($token->[0] eq 'E') {
1967: if ($token->[1] eq 'tag') {
1968: undef($tag);
1969: $tagnum++;
1970: } elsif ($token->[1] eq 'help') {
1971: undef($in_help);
1972: }
1973: }
1974: }
1975:
1976: # parse the allows and ignore tags set to <show>no</show>
1977: foreach my $tag (@alltags) {
1978: next if (!exists($insertlist{"$tag.allow"}));
1979: my $allow = $insertlist{"$tag.allow"};
1980: foreach my $element (split(',',$allow)) {
1981: $element =~ s/(^\s*|\s*$ )//gx;
1982: if (!exists($insertlist{"$element.show"})
1983: || $insertlist{"$element.show"} ne 'no') {
1984: push(@{ $insertlist{$tag.'.which'} },$element);
1985: }
1986: }
1987: }
1988: }
1989:
1990: sub register_insert {
1991: return ®ister_insert_xml(@_);
1992: # &dump_insertlist('2');
1993: }
1994:
1995: sub dump_insertlist {
1996: my ($ext) = @_;
1997: open(XML,">/tmp/insertlist.xml.$ext");
1998: print XML ("<insertlist>");
1999: my $i=0;
2000:
2001: while (exists($insertlist{"$i.tag"})) {
2002: my $tag = $insertlist{"$i.tag"};
2003: print XML ("
2004: \t<tag name=\"$tag\">");
2005: if (defined($insertlist{"$tag.description"})) {
2006: print XML ("
2007: \t\t<description>".$insertlist{"$tag.description"}."</description>");
2008: }
2009: if (defined($insertlist{"$tag.color"})) {
2010: print XML ("
2011: \t\t<color>".$insertlist{"$tag.color"}."</color>");
2012: }
2013: if (defined($insertlist{"$tag.function"})) {
2014: print XML ("
2015: \t\t<insert_sub>".$insertlist{"$tag.function"}."</insert_sub>");
2016: }
2017: if (defined($insertlist{"$tag.show"})
2018: && $insertlist{"$tag.show"} ne 'yes') {
2019: print XML ("
2020: \t\t<show>".$insertlist{"$tag.show"}."</show>");
2021: }
2022: if (defined($insertlist{"$tag.helpfile"})) {
2023: print XML ("
2024: \t\t<help>
2025: \t\t\t<file>".$insertlist{"$tag.helpfile"}."</file>");
2026: if ($insertlist{"$tag.helpdesc"} ne '') {
2027: print XML ("
2028: \t\t\t<description>".$insertlist{"$tag.helpdesc"}."</description>");
2029: }
2030: print XML ("
2031: \t\t</help>");
2032: }
2033: if (defined($insertlist{"$tag.which"})) {
2034: print XML ("
2035: \t\t<allow>".join(',',sort(@{ $insertlist{"$tag.which"} }))."</allow>");
2036: }
2037: print XML ("
2038: \t</tag>");
2039: $i++;
2040: }
2041: print XML ("\n</insertlist>\n");
2042: close(XML);
2043: }
2044:
2045: sub description {
2046: my ($token)=@_;
2047: my $tag = &get_tag($token);
2048: return $insertlist{$tag.'.description'};
2049: }
2050:
2051: # Returns a list containing the help file, and the description
2052: sub helpinfo {
2053: my ($token)=@_;
2054: my $tag = &get_tag($token);
2055: return ($insertlist{$tag.'.helpfile'}, $insertlist{$tag.'.helpdesc'});
2056: }
2057:
2058: sub get_tag {
2059: my ($token)=@_;
2060: my $tagnum;
2061: my $tag=$token->[1];
2062: foreach my $namespace (reverse(@Apache::lonxml::namespace)) {
2063: my $testtag = $namespace.'::'.$tag;
2064: $tagnum = $insertlist{"$testtag.num"};
2065: last if (defined($tagnum));
2066: }
2067: if (!defined($tagnum)) {
2068: $tagnum = $Apache::lonxml::insertlist{"$tag.num"};
2069: }
2070: return $insertlist{"$tagnum.tag"};
2071: }
2072:
2073: 1;
2074: __END__
2075:
2076:
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