1: # The LearningOnline Network with CAPA
2: # XML Parser Module
3: #
4: # $Id: lonxml.pm,v 1.462 2007/10/08 09:20:22 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:
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: $finaloutput .= join('',@script_var_displays);
378: undef(@script_var_displays);
379: }
380:
381: if ($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 $currentstring;
632: }
633:
634: sub setup_globals {
635: my ($request,$target)=@_;
636: $Apache::lonxml::request=$request;
637: $errorcount=0;
638: $warningcount=0;
639: $Apache::lonxml::default_homework_loaded=0;
640: $Apache::lonxml::usestyle=1;
641: &init_counter();
642: &clear_bubble_lines_for_part();
643: @Apache::lonxml::pwd=();
644: @Apache::lonxml::extlinks=();
645: @script_var_displays=();
646: @Apache::lonxml::ssi_info=();
647: $Apache::lonxml::post_evaluate=1;
648: $Apache::lonxml::warnings_error_header='';
649: $Apache::lonxml::substitute_LaTeX_symbols = 1;
650: if ($target eq 'meta') {
651: $Apache::lonxml::redirection = 0;
652: $Apache::lonxml::metamode = 1;
653: $Apache::lonxml::evaluate = 1;
654: $Apache::lonxml::import = 0;
655: } elsif ($target eq 'answer') {
656: $Apache::lonxml::redirection = 0;
657: $Apache::lonxml::metamode = 1;
658: $Apache::lonxml::evaluate = 1;
659: $Apache::lonxml::import = 1;
660: } elsif ($target eq 'grade') {
661: &startredirection(); #ended in inner_xmlparse on exit
662: $Apache::lonxml::metamode = 0;
663: $Apache::lonxml::evaluate = 1;
664: $Apache::lonxml::import = 1;
665: } elsif ($target eq 'modified') {
666: $Apache::lonxml::redirection = 0;
667: $Apache::lonxml::metamode = 0;
668: $Apache::lonxml::evaluate = 0;
669: $Apache::lonxml::import = 0;
670: } elsif ($target eq 'edit') {
671: $Apache::lonxml::redirection = 0;
672: $Apache::lonxml::metamode = 0;
673: $Apache::lonxml::evaluate = 0;
674: $Apache::lonxml::import = 0;
675: } elsif ($target eq 'analyze') {
676: $Apache::lonxml::redirection = 0;
677: $Apache::lonxml::metamode = 0;
678: $Apache::lonxml::evaluate = 1;
679: $Apache::lonxml::import = 1;
680: } else {
681: $Apache::lonxml::redirection = 0;
682: $Apache::lonxml::metamode = 0;
683: $Apache::lonxml::evaluate = 1;
684: $Apache::lonxml::import = 1;
685: }
686: }
687:
688: sub init_safespace {
689: my ($target,$safeeval,$safehole,$safeinit) = @_;
690: $safeeval->deny_only(':dangerous');
691: $safeeval->reval('use Math::Complex;');
692: $safeeval->permit_only(":default");
693: $safeeval->permit("entereval");
694: $safeeval->permit(":base_math");
695: $safeeval->permit("sort");
696: $safeeval->permit("time");
697: $safeeval->deny("rand");
698: $safeeval->deny("srand");
699: $safeeval->deny(":base_io");
700: $safehole->wrap(\&Apache::scripttag::xmlparse,$safeeval,'&xmlparse');
701: $safehole->wrap(\&Apache::outputtags::multipart,$safeeval,'&multipart');
702: $safehole->wrap(\&Apache::lonnet::EXT,$safeeval,'&EXT');
703: $safehole->wrap(\&Apache::chemresponse::chem_standard_order,$safeeval,
704: '&chem_standard_order');
705: $safehole->wrap(\&Apache::response::check_status,$safeeval,'&check_status');
706:
707: $safehole->wrap(\&Apache::lonmaxima::maxima_eval,$safeeval,'&maxima_eval');
708: $safehole->wrap(\&Apache::lonmaxima::maxima_check,$safeeval,'&maxima_check');
709: $safehole->wrap(\&Apache::lonmaxima::maxima_cas_formula_fix,$safeeval,
710: '&maxima_cas_formula_fix');
711:
712: $safehole->wrap(\&Apache::caparesponse::capa_formula_fix,$safeeval,
713: '&capa_formula_fix');
714:
715: $safehole->wrap(\&Math::Cephes::asin,$safeeval,'&asin');
716: $safehole->wrap(\&Math::Cephes::acos,$safeeval,'&acos');
717: $safehole->wrap(\&Math::Cephes::atan,$safeeval,'&atan');
718: $safehole->wrap(\&Math::Cephes::sinh,$safeeval,'&sinh');
719: $safehole->wrap(\&Math::Cephes::cosh,$safeeval,'&cosh');
720: $safehole->wrap(\&Math::Cephes::tanh,$safeeval,'&tanh');
721: $safehole->wrap(\&Math::Cephes::asinh,$safeeval,'&asinh');
722: $safehole->wrap(\&Math::Cephes::acosh,$safeeval,'&acosh');
723: $safehole->wrap(\&Math::Cephes::atanh,$safeeval,'&atanh');
724: $safehole->wrap(\&Math::Cephes::erf,$safeeval,'&erf');
725: $safehole->wrap(\&Math::Cephes::erfc,$safeeval,'&erfc');
726: $safehole->wrap(\&Math::Cephes::j0,$safeeval,'&j0');
727: $safehole->wrap(\&Math::Cephes::j1,$safeeval,'&j1');
728: $safehole->wrap(\&Math::Cephes::jn,$safeeval,'&jn');
729: $safehole->wrap(\&Math::Cephes::jv,$safeeval,'&jv');
730: $safehole->wrap(\&Math::Cephes::y0,$safeeval,'&y0');
731: $safehole->wrap(\&Math::Cephes::y1,$safeeval,'&y1');
732: $safehole->wrap(\&Math::Cephes::yn,$safeeval,'&yn');
733: $safehole->wrap(\&Math::Cephes::yv,$safeeval,'&yv');
734:
735: $safehole->wrap(\&Math::Cephes::bdtr ,$safeeval,'&bdtr' );
736: $safehole->wrap(\&Math::Cephes::bdtrc ,$safeeval,'&bdtrc' );
737: $safehole->wrap(\&Math::Cephes::bdtri ,$safeeval,'&bdtri' );
738: $safehole->wrap(\&Math::Cephes::btdtr ,$safeeval,'&btdtr' );
739: $safehole->wrap(\&Math::Cephes::chdtr ,$safeeval,'&chdtr' );
740: $safehole->wrap(\&Math::Cephes::chdtrc,$safeeval,'&chdtrc');
741: $safehole->wrap(\&Math::Cephes::chdtri,$safeeval,'&chdtri');
742: $safehole->wrap(\&Math::Cephes::fdtr ,$safeeval,'&fdtr' );
743: $safehole->wrap(\&Math::Cephes::fdtrc ,$safeeval,'&fdtrc' );
744: $safehole->wrap(\&Math::Cephes::fdtri ,$safeeval,'&fdtri' );
745: $safehole->wrap(\&Math::Cephes::gdtr ,$safeeval,'&gdtr' );
746: $safehole->wrap(\&Math::Cephes::gdtrc ,$safeeval,'&gdtrc' );
747: $safehole->wrap(\&Math::Cephes::nbdtr ,$safeeval,'&nbdtr' );
748: $safehole->wrap(\&Math::Cephes::nbdtrc,$safeeval,'&nbdtrc');
749: $safehole->wrap(\&Math::Cephes::nbdtri,$safeeval,'&nbdtri');
750: $safehole->wrap(\&Math::Cephes::ndtr ,$safeeval,'&ndtr' );
751: $safehole->wrap(\&Math::Cephes::ndtri ,$safeeval,'&ndtri' );
752: $safehole->wrap(\&Math::Cephes::pdtr ,$safeeval,'&pdtr' );
753: $safehole->wrap(\&Math::Cephes::pdtrc ,$safeeval,'&pdtrc' );
754: $safehole->wrap(\&Math::Cephes::pdtri ,$safeeval,'&pdtri' );
755: $safehole->wrap(\&Math::Cephes::stdtr ,$safeeval,'&stdtr' );
756: $safehole->wrap(\&Math::Cephes::stdtri,$safeeval,'&stdtri');
757:
758: $safehole->wrap(\&Math::Cephes::Matrix::mat,$safeeval,'&mat');
759: $safehole->wrap(\&Math::Cephes::Matrix::new,$safeeval,
760: '&Math::Cephes::Matrix::new');
761: $safehole->wrap(\&Math::Cephes::Matrix::coef,$safeeval,
762: '&Math::Cephes::Matrix::coef');
763: $safehole->wrap(\&Math::Cephes::Matrix::clr,$safeeval,
764: '&Math::Cephes::Matrix::clr');
765: $safehole->wrap(\&Math::Cephes::Matrix::add,$safeeval,
766: '&Math::Cephes::Matrix::add');
767: $safehole->wrap(\&Math::Cephes::Matrix::sub,$safeeval,
768: '&Math::Cephes::Matrix::sub');
769: $safehole->wrap(\&Math::Cephes::Matrix::mul,$safeeval,
770: '&Math::Cephes::Matrix::mul');
771: $safehole->wrap(\&Math::Cephes::Matrix::div,$safeeval,
772: '&Math::Cephes::Matrix::div');
773: $safehole->wrap(\&Math::Cephes::Matrix::inv,$safeeval,
774: '&Math::Cephes::Matrix::inv');
775: $safehole->wrap(\&Math::Cephes::Matrix::transp,$safeeval,
776: '&Math::Cephes::Matrix::transp');
777: $safehole->wrap(\&Math::Cephes::Matrix::simq,$safeeval,
778: '&Math::Cephes::Matrix::simq');
779: $safehole->wrap(\&Math::Cephes::Matrix::mat_to_vec,$safeeval,
780: '&Math::Cephes::Matrix::mat_to_vec');
781: $safehole->wrap(\&Math::Cephes::Matrix::vec_to_mat,$safeeval,
782: '&Math::Cephes::Matrix::vec_to_mat');
783: $safehole->wrap(\&Math::Cephes::Matrix::check,$safeeval,
784: '&Math::Cephes::Matrix::check');
785: $safehole->wrap(\&Math::Cephes::Matrix::check,$safeeval,
786: '&Math::Cephes::Matrix::check');
787:
788: # $safehole->wrap(\&Math::Cephes::new_fract,$safeeval,'&new_fract');
789: # $safehole->wrap(\&Math::Cephes::radd,$safeeval,'&radd');
790: # $safehole->wrap(\&Math::Cephes::rsub,$safeeval,'&rsub');
791: # $safehole->wrap(\&Math::Cephes::rmul,$safeeval,'&rmul');
792: # $safehole->wrap(\&Math::Cephes::rdiv,$safeeval,'&rdiv');
793: # $safehole->wrap(\&Math::Cephes::euclid,$safeeval,'&euclid');
794:
795: $safehole->wrap(\&Math::Random::random_beta,$safeeval,'&math_random_beta');
796: $safehole->wrap(\&Math::Random::random_chi_square,$safeeval,'&math_random_chi_square');
797: $safehole->wrap(\&Math::Random::random_exponential,$safeeval,'&math_random_exponential');
798: $safehole->wrap(\&Math::Random::random_f,$safeeval,'&math_random_f');
799: $safehole->wrap(\&Math::Random::random_gamma,$safeeval,'&math_random_gamma');
800: $safehole->wrap(\&Math::Random::random_multivariate_normal,$safeeval,'&math_random_multivariate_normal');
801: $safehole->wrap(\&Math::Random::random_multinomial,$safeeval,'&math_random_multinomial');
802: $safehole->wrap(\&Math::Random::random_noncentral_chi_square,$safeeval,'&math_random_noncentral_chi_square');
803: $safehole->wrap(\&Math::Random::random_noncentral_f,$safeeval,'&math_random_noncentral_f');
804: $safehole->wrap(\&Math::Random::random_normal,$safeeval,'&math_random_normal');
805: $safehole->wrap(\&Math::Random::random_permutation,$safeeval,'&math_random_permutation');
806: $safehole->wrap(\&Math::Random::random_permuted_index,$safeeval,'&math_random_permuted_index');
807: $safehole->wrap(\&Math::Random::random_uniform,$safeeval,'&math_random_uniform');
808: $safehole->wrap(\&Math::Random::random_poisson,$safeeval,'&math_random_poisson');
809: $safehole->wrap(\&Math::Random::random_uniform_integer,$safeeval,'&math_random_uniform_integer');
810: $safehole->wrap(\&Math::Random::random_negative_binomial,$safeeval,'&math_random_negative_binomial');
811: $safehole->wrap(\&Math::Random::random_binomial,$safeeval,'&math_random_binomial');
812: $safehole->wrap(\&Math::Random::random_seed_from_phrase,$safeeval,'&random_seed_from_phrase');
813: $safehole->wrap(\&Math::Random::random_set_seed_from_phrase,$safeeval,'&random_set_seed_from_phrase');
814: $safehole->wrap(\&Math::Random::random_get_seed,$safeeval,'&random_get_seed');
815: $safehole->wrap(\&Math::Random::random_set_seed,$safeeval,'&random_set_seed');
816: $safehole->wrap(\&Apache::loncommon::languages,$safeeval,'&languages');
817: $safehole->wrap(\&Apache::lonxml::error,$safeeval,'&LONCAPA_INTERNAL_ERROR');
818: $safehole->wrap(\&Apache::lonxml::debug,$safeeval,'&LONCAPA_INTERNAL_DEBUG');
819: $safehole->wrap(\&Apache::lonnet::logthis,$safeeval,'&LONCAPA_INTERNAL_LOGTHIS');
820: $safehole->wrap(\&Apache::inputtags::finalizeawards,$safeeval,'&LONCAPA_INTERNAL_FINALIZEAWARDS');
821: $safehole->wrap(\&Apache::caparesponse::get_sigrange,$safeeval,'&LONCAPA_INTERNAL_get_sigrange');
822: # use Data::Dumper;
823: # $safehole->wrap(\&Data::Dumper::Dumper,$safeeval,'&LONCAPA_INTERNAL_Dumper');
824: #need to inspect this class of ops
825: # $safeeval->deny(":base_orig");
826: $safeeval->permit("require");
827: $safeinit .= ';$external::target="'.$target.'";';
828: &Apache::run::run($safeinit,$safeeval);
829: &initialize_rndseed($safeeval);
830: }
831:
832: sub clean_safespace {
833: my ($safeeval) = @_;
834: delete_package_recurse($safeeval->{Root});
835: }
836:
837: sub delete_package_recurse {
838: my ($package) = @_;
839: my @subp;
840: {
841: no strict 'refs';
842: while (my ($key,$val) = each(%{*{"$package\::"}})) {
843: if (!defined($val)) { next; }
844: local (*ENTRY) = $val;
845: if (defined *ENTRY{HASH} && $key =~ /::$/ &&
846: $key ne "main::" && $key ne "<none>::")
847: {
848: my ($p) = $package ne "main" ? "$package\::" : "";
849: ($p .= $key) =~ s/::$//;
850: push(@subp,$p);
851: }
852: }
853: }
854: foreach my $p (@subp) {
855: delete_package_recurse($p);
856: }
857: Symbol::delete_package($package);
858: }
859:
860: sub initialize_rndseed {
861: my ($safeeval)=@_;
862: my $rndseed;
863: my ($symb,$courseid,$domain,$name) = &Apache::lonnet::whichuser();
864: $rndseed=&Apache::lonnet::rndseed($symb,$courseid,$domain,$name);
865: my $safeinit = '$external::randomseed="'.$rndseed.'";';
866: &Apache::lonxml::debug("Setting rndseed to $rndseed");
867: &Apache::run::run($safeinit,$safeeval);
868: }
869:
870: sub default_homework_load {
871: my ($safeeval)=@_;
872: &Apache::lonxml::debug('Loading default_homework');
873: my $default=&Apache::lonnet::getfile('/home/httpd/html/res/adm/includes/default_homework.lcpm');
874: if ($default eq -1) {
875: &Apache::lonxml::error("<b>Unable to find <i>default_homework.lcpm</i></b>");
876: } else {
877: &Apache::run::run($default,$safeeval);
878: $Apache::lonxml::default_homework_loaded=1;
879: }
880: }
881:
882: {
883: my $alarm_depth;
884: sub init_alarm {
885: alarm(0);
886: $alarm_depth=0;
887: }
888:
889: sub start_alarm {
890: if ($alarm_depth<1) {
891: my $old=alarm($Apache::lonnet::perlvar{'lonScriptTimeout'});
892: if ($old) {
893: &Apache::lonxml::error("Cancelled an alarm of $old, this shouldn't occur.");
894: }
895: }
896: $alarm_depth++;
897: }
898:
899: sub end_alarm {
900: $alarm_depth--;
901: if ($alarm_depth<1) { alarm(0); }
902: }
903: }
904: my $metamode_was;
905: sub startredirection {
906: if (!$Apache::lonxml::redirection) {
907: $metamode_was=$Apache::lonxml::metamode;
908: }
909: $Apache::lonxml::metamode=0;
910: $Apache::lonxml::redirection++;
911: push (@Apache::lonxml::outputstack, '');
912: }
913:
914: sub endredirection {
915: if (!$Apache::lonxml::redirection) {
916: &Apache::lonxml::error("Endredirection was called before a startredirection, perhaps you have unbalanced tags. Some debugging information:".join ":",caller);
917: return '';
918: }
919: $Apache::lonxml::redirection--;
920: if (!$Apache::lonxml::redirection) {
921: $Apache::lonxml::metamode=$metamode_was;
922: }
923: pop @Apache::lonxml::outputstack;
924: }
925: sub in_redirection {
926: return ($Apache::lonxml::redirection > 0)
927: }
928:
929: sub end_tag {
930: my ($tagstack,$parstack,$token)=@_;
931: pop(@$tagstack);
932: pop(@$parstack);
933: &decreasedepth($token);
934: }
935:
936: sub initdepth {
937: @Apache::lonxml::depthcounter=();
938: undef($Apache::lonxml::last_depth_count);
939: }
940:
941:
942: my @timers;
943: my $lasttime;
944: # @Apache::lonxml::depthcounter -> count of tags that exist so
945: # far at each level
946: # $Apache::lonxml::last_depth_count -> when ascending, need to
947: # remember the count for the level below the current level (for
948: # example going from 1_2 -> 1 -> 1_3 need to remember the 2 )
949:
950: sub increasedepth {
951: my ($token) = @_;
952: push(@Apache::lonxml::depthcounter,$Apache::lonxml::last_depth_count+1);
953: undef($Apache::lonxml::last_depth_count);
954: my $time;
955: if ($Apache::lonxml::debug eq "1") {
956: push(@timers,[&gettimeofday()]);
957: $time=&tv_interval($lasttime);
958: $lasttime=[&gettimeofday()];
959: }
960: my $spacing=' 'x($#Apache::lonxml::depthcounter);
961: $Apache::lonxml::curdepth=join('_',@Apache::lonxml::depthcounter);
962: # &Apache::lonxml::debug("s$spacing$Apache::lonxml::depth : $Apache::lonxml::olddepth : $Apache::lonxml::curdepth : $token->[1] : $time");
963: #print "<br />s $Apache::lonxml::depth : $Apache::lonxml::olddepth : $curdepth : $token->[1]\n";
964: }
965:
966: sub decreasedepth {
967: my ($token) = @_;
968: if ( $#Apache::lonxml::depthcounter == -1) {
969: &Apache::lonxml::warning(&mt("Missing tags, unable to properly run file."));
970: }
971: $Apache::lonxml::last_depth_count = pop(@Apache::lonxml::depthcounter);
972:
973: my ($timer,$time);
974: if ($Apache::lonxml::debug eq "1") {
975: $timer=pop(@timers);
976: $time=&tv_interval($lasttime);
977: $lasttime=[&gettimeofday()];
978: }
979: my $spacing=' 'x($#Apache::lonxml::depthcounter);
980: $Apache::lonxml::curdepth = join('_',@Apache::lonxml::depthcounter);
981: # &Apache::lonxml::debug("e$spacing$Apache::lonxml::depth : $Apache::lonxml::olddepth : $Apache::lonxml::curdepth : $token->[1] : $time : ".&tv_interval($timer));
982: #print "<br />e $Apache::lonxml::depth : $Apache::lonxml::olddepth : $token->[1] : $curdepth\n";
983: }
984:
985: sub get_id {
986: my ($parstack,$safeeval)=@_;
987: my $id= &Apache::lonxml::get_param('id',$parstack,$safeeval);
988: if ($env{'request.state'} eq 'construct' && $id =~ /([._]|[^\w\d\s[:punct:]])/) {
989: &error(&mt("ID "[_1]" contains invalid characters, IDs are only allowed to contain letters, numbers, spaces and -",'<tt>'.$id.'</tt>'));
990: }
991: if ($id =~ /^\s*$/) { $id = $Apache::lonxml::curdepth; }
992: return $id;
993: }
994:
995: sub get_all_text_unbalanced {
996: #there is a copy of this in lonpublisher.pm
997: my($tag,$pars)= @_;
998: my $token;
999: my $result='';
1000: $tag='<'.$tag.'>';
1001: while ($token = $$pars[-1]->get_token) {
1002: if (($token->[0] eq 'T')||($token->[0] eq 'C')||($token->[0] eq 'D')) {
1003: if ($token->[0] eq 'T' && $token->[2]) {
1004: $result.='<![CDATA['.$token->[1].']]>';
1005: } else {
1006: $result.=$token->[1];
1007: }
1008: } elsif ($token->[0] eq 'PI') {
1009: $result.=$token->[2];
1010: } elsif ($token->[0] eq 'S') {
1011: $result.=$token->[4];
1012: } elsif ($token->[0] eq 'E') {
1013: $result.=$token->[2];
1014: }
1015: if ($result =~ /\Q$tag\E/is) {
1016: ($result,my $redo)=$result =~ /(.*)\Q$tag\E(.*)/is;
1017: #&Apache::lonxml::debug('Got a winner with leftovers ::'.$2);
1018: #&Apache::lonxml::debug('Result is :'.$1);
1019: $redo=$tag.$redo;
1020: &Apache::lonxml::newparser($pars,\$redo);
1021: last;
1022: }
1023: }
1024: return $result
1025:
1026: }
1027:
1028: #########################################################################
1029: # #
1030: # bubble line counter management #
1031: # #
1032: #########################################################################
1033:
1034: =pod
1035:
1036: For bubble grading mode and exam bubble printing mode, the tracking of
1037: the current 'bubble line number' is stored in the %env element
1038: 'form.counter', and is modifed and handled by the following routines.
1039:
1040: The value of it is stored in $Apache:lonxml::counter when live and
1041: stored back to env after done.
1042:
1043: =item &increment_counter($increment);
1044:
1045: Increments the internal counter environment variable a specified amount
1046:
1047: Optional Arguments:
1048: $increment - amount to increment by (defaults to 1)
1049: Also 1 if the value is negative or zero.
1050: $part_id - optional part id.. during analysis, this
1051: indicates whic part of a problem is being
1052: counted.
1053:
1054: =cut
1055:
1056: sub increment_counter {
1057: my ($increment, $part_id) = @_;
1058: if (!defined($increment) || $increment le 0) {
1059: $increment = 1;
1060: }
1061: $Apache::lonxml::counter += $increment;
1062:
1063: # If the caller supplied the part_id parameter,
1064: # Maintain its counter.. creating if necessary.
1065:
1066: if(defined($part_id)) {
1067: if (!defined($Apache::lonxml::counters_per_part{$part_id})) {
1068: $Apache::lonxml::counters_per_part{$part_id} = 0;
1069: }
1070: $Apache::lonxml::counters_per_part{$part_id} += $increment;
1071: my $new_value = $Apache::lonxml::counters_per_part{$part_id};
1072: }
1073:
1074: $Apache::lonxml::counter_changed=1;
1075: }
1076:
1077: =pod
1078:
1079: =item &init_counter($increment);
1080:
1081: Initialize the internal counter environment variable
1082:
1083: =cut
1084:
1085: sub init_counter {
1086: if ($env{'request.state'} eq 'construct') {
1087: $Apache::lonxml::counter=1;
1088: $Apache::lonxml::counter_changed=1;
1089: } elsif (defined($env{'form.counter'})) {
1090: $Apache::lonxml::counter=$env{'form.counter'};
1091: $Apache::lonxml::counter_changed=0;
1092: } else {
1093: $Apache::lonxml::counter=1;
1094: $Apache::lonxml::counter_changed=1;
1095: }
1096: }
1097:
1098: sub store_counter {
1099: &Apache::lonnet::appenv(('form.counter' => $Apache::lonxml::counter));
1100: $Apache::lonxml::counter_changed=0;
1101: return '';
1102: }
1103:
1104: {
1105: my $state;
1106: sub clear_problem_counter {
1107: undef($state);
1108: &Apache::lonnet::delenv('form.counter');
1109: &Apache::lonxml::init_counter();
1110: &Apache::lonxml::store_counter();
1111: }
1112:
1113: sub remember_problem_counter {
1114: &Apache::lonnet::transfer_profile_to_env(undef,undef,1);
1115: $state = $env{'form.counter'};
1116: }
1117:
1118: sub restore_problem_counter {
1119: if (defined($state)) {
1120: &Apache::lonnet::appenv(('form.counter' => $state));
1121: }
1122: }
1123: sub get_problem_counter {
1124: if ($Apache::lonxml::counter_changed) { &store_counter() }
1125: &Apache::lonnet::transfer_profile_to_env(undef,undef,1);
1126: return $env{'form.counter'};
1127: }
1128: }
1129:
1130: =pod
1131:
1132: =item bubble_lines_for_part(part_id)
1133:
1134: Returns the number of lines required to get a response for
1135: $part_id (this is just $Apache::lonxml::counters_per_part{$part_id}
1136:
1137: =cut
1138:
1139: sub bubble_lines_for_part {
1140: my ($part_id) = @_;
1141:
1142: if (!defined($Apache::lonxml::counters_per_part{$part_id})) {
1143: return 0;
1144: } else {
1145: return $Apache::lonxml::counters_per_part{$part_id};
1146: }
1147:
1148: }
1149:
1150: =pod
1151:
1152: =item clear_bubble_lines_for_part
1153:
1154: Clears the hash of bubble lines per part. If a caller
1155: needs to analyze several resources this should be called between
1156: resources to reset the hash for each problem being analyzed.
1157:
1158: =cut
1159:
1160: sub clear_bubble_lines_for_part {
1161: undef(%Apache::lonxml::counters_per_part);
1162: }
1163:
1164: =pod
1165:
1166: =item set_bubble_lines(part_id, value)
1167:
1168: If there is a problem part, that for whatever reason
1169: requires bubble lines that are not
1170: the same as the counter increment, it can call this sub during
1171: analysis to set its hash value explicitly.
1172:
1173: =cut
1174:
1175: sub set_bubble_lines {
1176: my ($part_id, $value) = @_;
1177:
1178: $Apache::lonxml::counters_per_part{$part_id} = $value;
1179: }
1180:
1181: =pod
1182:
1183: =item get_bubble_line_hash
1184:
1185: Returns the current bubble line hash. This is assumed to
1186: be small so we return a copy
1187:
1188:
1189: =cut
1190:
1191: sub get_bubble_line_hash {
1192: return %Apache::lonxml::counters_per_part;
1193: }
1194:
1195:
1196: #--------------------------------------------------
1197:
1198: sub get_all_text {
1199: my($tag,$pars,$style)= @_;
1200: my $gotfullstack=1;
1201: if (ref($pars) ne 'ARRAY') {
1202: $gotfullstack=0;
1203: $pars=[$pars];
1204: }
1205: if (ref($style) ne 'HASH') {
1206: $style={};
1207: }
1208: my $depth=0;
1209: my $token;
1210: my $result='';
1211: if ( $tag =~ m:^/: ) {
1212: my $tag=substr($tag,1);
1213: #&Apache::lonxml::debug("have:$tag:");
1214: my $top_empty=0;
1215: while (($depth >=0) && ($#$pars > -1) && (!$top_empty)) {
1216: while (($depth >=0) && ($token = $$pars[-1]->get_token)) {
1217: #&Apache::lonxml::debug("e token:$token->[0]:$depth:$token->[1]:".$#$pars.":".$#Apache::lonxml::pwd);
1218: if (($token->[0] eq 'T')||($token->[0] eq 'C')||($token->[0] eq 'D')) {
1219: if ($token->[2]) {
1220: $result.='<![CDATA['.$token->[1].']]>';
1221: } else {
1222: $result.=$token->[1];
1223: }
1224: } elsif ($token->[0] eq 'PI') {
1225: $result.=$token->[2];
1226: } elsif ($token->[0] eq 'S') {
1227: if ($token->[1] =~ /^\Q$tag\E$/i) { $depth++; }
1228: if ($token->[1] =~ /^LONCAPA_INTERNAL_TURN_STYLE_ON$/) { $Apache::lonxml::usestyle=1; }
1229: if ($token->[1] =~ /^LONCAPA_INTERNAL_TURN_STYLE_OFF$/) { $Apache::lonxml::usestyle=0; }
1230: $result.=$token->[4];
1231: } elsif ($token->[0] eq 'E') {
1232: if ( $token->[1] =~ /^\Q$tag\E$/i) { $depth--; }
1233: #skip sending back the last end tag
1234: if ($depth == 0 && exists($$style{'/'.$token->[1]}) && $Apache::lonxml::usestyle) {
1235: my $string=
1236: '<LONCAPA_INTERNAL_TURN_STYLE_OFF end="yes" />'.
1237: $$style{'/'.$token->[1]}.
1238: $token->[2].
1239: '<LONCAPA_INTERNAL_TURN_STYLE_ON />';
1240: &Apache::lonxml::newparser($pars,\$string);
1241: #&Apache::lonxml::debug("reParsing $string");
1242: next;
1243: }
1244: if ($depth > -1) {
1245: $result.=$token->[2];
1246: } else {
1247: $$pars[-1]->unget_token($token);
1248: }
1249: }
1250: }
1251: if (($depth >=0) && ($#$pars == 0) ) { $top_empty=1; }
1252: if (($depth >=0) && ($#$pars > 0) ) {
1253: pop(@$pars);
1254: pop(@Apache::lonxml::pwd);
1255: }
1256: }
1257: if ($top_empty && $depth >= 0) {
1258: #never found the end tag ran out of text, throw error send back blank
1259: &error('Never found end tag for <'.$tag.
1260: '> current string <pre>'.
1261: &HTML::Entities::encode($result,'<>&"').
1262: '</pre>');
1263: if ($gotfullstack) {
1264: my $newstring='</'.$tag.'>'.$result;
1265: &Apache::lonxml::newparser($pars,\$newstring);
1266: }
1267: $result='';
1268: }
1269: } else {
1270: while ($#$pars > -1) {
1271: while ($token = $$pars[-1]->get_token) {
1272: #&Apache::lonxml::debug("s token:$token->[0]:$depth:$token->[1]");
1273: if (($token->[0] eq 'T')||($token->[0] eq 'C')||
1274: ($token->[0] eq 'D')) {
1275: if ($token->[2]) {
1276: $result.='<![CDATA['.$token->[1].']]>';
1277: } else {
1278: $result.=$token->[1];
1279: }
1280: } elsif ($token->[0] eq 'PI') {
1281: $result.=$token->[2];
1282: } elsif ($token->[0] eq 'S') {
1283: if ( $token->[1] =~ /^\Q$tag\E$/i) {
1284: $$pars[-1]->unget_token($token); last;
1285: } else {
1286: $result.=$token->[4];
1287: }
1288: if ($token->[1] =~ /^LONCAPA_INTERNAL_TURN_STYLE_ON$/) { $Apache::lonxml::usestyle=1; }
1289: if ($token->[1] =~ /^LONCAPA_INTERNAL_TURN_STYLE_OFF$/) { $Apache::lonxml::usestyle=0; }
1290: } elsif ($token->[0] eq 'E') {
1291: $result.=$token->[2];
1292: }
1293: }
1294: if (($#$pars > 0) ) {
1295: pop(@$pars);
1296: pop(@Apache::lonxml::pwd);
1297: } else { last; }
1298: }
1299: }
1300: #&Apache::lonxml::debug("Exit:$result:");
1301: return $result
1302: }
1303:
1304: sub newparser {
1305: my ($parser,$contentref,$dir) = @_;
1306: push (@$parser,HTML::LCParser->new($contentref));
1307: $$parser[-1]->xml_mode(1);
1308: $$parser[-1]->marked_sections(1);
1309: if ( $dir eq '' ) {
1310: push (@Apache::lonxml::pwd, $Apache::lonxml::pwd[$#Apache::lonxml::pwd]);
1311: } else {
1312: push (@Apache::lonxml::pwd, $dir);
1313: }
1314: }
1315:
1316: sub parstring {
1317: my ($token) = @_;
1318: my (@vars,@values);
1319: foreach my $attr (@{$token->[3]}) {
1320: if ($attr!~/\W/) {
1321: my $val=$token->[2]->{$attr};
1322: $val =~ s/([\%\@\\\"\'])/\\$1/g;
1323: $val =~ s/(\$[^\{a-zA-Z_])/\\$1/g;
1324: $val =~ s/(\$)$/\\$1/;
1325: #if ($val =~ m/^[\%\@]/) { $val="\\".$val; }
1326: push(@vars,"\$$attr");
1327: push(@values,"\"$val\"");
1328: }
1329: }
1330: my $var_init =
1331: (@vars) ? 'my ('.join(',',@vars).') = ('.join(',',@values).');'
1332: : '';
1333: return $var_init;
1334: }
1335:
1336: sub extlink {
1337: my ($res,$exact)=@_;
1338: if (!$exact) {
1339: $res=&Apache::lonnet::hreflocation($Apache::lonxml::pwd[-1],$res);
1340: }
1341: push(@Apache::lonxml::extlinks,$res)
1342: }
1343:
1344: sub writeallows {
1345: unless ($#extlinks>=0) { return; }
1346: my $thisurl = &Apache::lonnet::clutter(shift);
1347: if ($env{'httpref.'.$thisurl}) {
1348: $thisurl=$env{'httpref.'.$thisurl};
1349: }
1350: my $thisdir=$thisurl;
1351: $thisdir=~s/\/[^\/]+$//;
1352: my %httpref=();
1353: foreach (@extlinks) {
1354: $httpref{'httpref.'.
1355: &Apache::lonnet::hreflocation($thisdir,&unescape($_))}=$thisurl;
1356: }
1357: @extlinks=();
1358: &Apache::lonnet::appenv(%httpref);
1359: }
1360:
1361: sub register_ssi {
1362: my ($url,%form)=@_;
1363: push (@Apache::lonxml::ssi_info,{'url'=>$url,'form'=>\%form});
1364: return '';
1365: }
1366:
1367: sub do_registered_ssi {
1368: foreach my $info (@Apache::lonxml::ssi_info) {
1369: my %form=%{ $info->{'form'}};
1370: my $url=$info->{'url'};
1371: &Apache::lonnet::ssi($url,%form);
1372: }
1373: }
1374:
1375: sub add_script_result {
1376: my ($display) = @_;
1377: push(@script_var_displays, $display);
1378: }
1379:
1380: #
1381: # Afterburner handles anchors, highlights and links
1382: #
1383: sub afterburn {
1384: my $result=shift;
1385: &Apache::loncommon::get_unprocessed_cgi($ENV{'QUERY_STRING'},
1386: ['highlight','anchor','link']);
1387: if ($env{'form.highlight'}) {
1388: foreach (split(/\,/,$env{'form.highlight'})) {
1389: my $anchorname=$_;
1390: my $matchthis=$anchorname;
1391: $matchthis=~s/\_+/\\s\+/g;
1392: $result=~s/(\Q$matchthis\E)/\<font color=\"red\"\>$1\<\/font\>/gs;
1393: }
1394: }
1395: if ($env{'form.link'}) {
1396: foreach (split(/\,/,$env{'form.link'})) {
1397: my ($anchorname,$linkurl)=split(/\>/,$_);
1398: my $matchthis=$anchorname;
1399: $matchthis=~s/\_+/\\s\+/g;
1400: $result=~s/(\Q$matchthis\E)/\<a href=\"$linkurl\"\>$1\<\/a\>/gs;
1401: }
1402: }
1403: if ($env{'form.anchor'}) {
1404: my $anchorname=$env{'form.anchor'};
1405: my $matchthis=$anchorname;
1406: $matchthis=~s/\_+/\\s\+/g;
1407: $result=~s/(\Q$matchthis\E)/\<a name=\"$anchorname\"\>$1\<\/a\>/s;
1408: $result.=(<<"ENDSCRIPT");
1409: <script type="text/javascript">
1410: document.location.hash='$anchorname';
1411: </script>
1412: ENDSCRIPT
1413: }
1414: return $result;
1415: }
1416:
1417: sub storefile {
1418: my ($file,$contents)=@_;
1419: &Apache::lonnet::correct_line_ends(\$contents);
1420: if (my $fh=Apache::File->new('>'.$file)) {
1421: print $fh $contents;
1422: $fh->close();
1423: return 1;
1424: } else {
1425: &warning("Unable to save file $file");
1426: return 0;
1427: }
1428: }
1429:
1430: sub createnewhtml {
1431: my $title=&mt('Title of document goes here');
1432: my $body=&mt('Body of document goes here');
1433: my $filecontents=(<<SIMPLECONTENT);
1434: <html>
1435: <head>
1436: <title>$title</title>
1437: </head>
1438: <body bgcolor="#FFFFFF">
1439: $body
1440: </body>
1441: </html>
1442: SIMPLECONTENT
1443: return $filecontents;
1444: }
1445:
1446: sub createnewsty {
1447: my $filecontents=(<<SIMPLECONTENT);
1448: <definetag name="">
1449: <render>
1450: <web></web>
1451: <tex></tex>
1452: </render>
1453: </definetag>
1454: SIMPLECONTENT
1455: return $filecontents;
1456: }
1457:
1458:
1459: sub inserteditinfo {
1460: my ($filecontents,$filetype)=@_;
1461: $filecontents = &HTML::Entities::encode($filecontents,'<>&"');
1462: # my $editheader='<a href="#editsection">Edit below</a><hr />';
1463: my $xml_help = '';
1464: my $initialize='';
1465: my $textarea_id = 'filecont';
1466: my ($add_to_onload, $add_to_onresize);
1467: my $addbuttons=&Apache::lonhtmlcommon::htmlareaaddbuttons();
1468: $initialize=&Apache::lonhtmlcommon::spellheader();
1469: if ($filetype eq 'html'
1470: && (!&Apache::lonhtmlcommon::htmlareablocked() &&
1471: &Apache::lonhtmlcommon::htmlareabrowser())) {
1472: $textarea_id .= '_htmlarea';
1473: $initialize.=(<<FULLPAGE);
1474: <script type="text/javascript">
1475: $addbuttons
1476:
1477: HTMLArea.loadPlugin("FullPage");
1478:
1479: function initDocument() {
1480: var editor=new HTMLArea("filecont",config);
1481: editor.registerPlugin(FullPage);
1482: editor.generate();
1483: setTimeout(
1484: function () {
1485: HTMLArea._addEvents(editor._doc,
1486: ["keypress","mousedown"], unClean);
1487: editor._iframe.id = '$textarea_id';
1488: resize_textarea('$textarea_id','LC_aftertextarea');
1489: },300);
1490: }
1491: </script>
1492: FULLPAGE
1493: } else {
1494: $initialize.=(<<FULLPAGE);
1495: <script type="text/javascript">
1496: $addbuttons
1497: function initDocument() {
1498: resize_textarea('$textarea_id','LC_aftertextarea');
1499: }
1500: </script>
1501: FULLPAGE
1502: }
1503:
1504: $add_to_onload = 'initDocument();';
1505: $add_to_onresize = "resize_textarea('$textarea_id','LC_aftertextarea');";
1506:
1507: if ($filetype eq 'html') {
1508: $xml_help=&Apache::loncommon::helpLatexCheatsheet();
1509: }
1510:
1511: my $cleanbut = '';
1512:
1513: my $titledisplay=&display_title();
1514: my %lt=&Apache::lonlocal::texthash('st' => 'Save and Edit',
1515: 'vi' => 'Save and View',
1516: 'dv' => 'Discard Edits and View',
1517: 'un' => 'undo',
1518: 'ed' => 'Edit');
1519: my $buttons=(<<BUTTONS);
1520: $cleanbut
1521: <input type="submit" name="discardview" accesskey="d" value="$lt{'dv'}" />
1522: <input type="submit" name="Undo" accesskey="u" value="$lt{'un'}" /><hr />
1523: <input type="submit" name="savethisfile" accesskey="s" value="$lt{'st'}" />
1524: <input type="submit" name="viewmode" accesskey="v" value="$lt{'vi'}" />
1525: BUTTONS
1526: $buttons.=&Apache::lonhtmlcommon::spelllink('xmledit','filecont');
1527: my $textarea_events = &Apache::edit::element_change_detection();
1528: my $form_events = &Apache::edit::form_change_detection();
1529: my $editfooter=(<<ENDFOOTER);
1530: $initialize
1531: <hr />
1532: <a name="editsection" />
1533: <form $form_events method="post" name="xmledit">
1534: $xml_help
1535: <input type="hidden" name="editmode" value="$lt{'ed'}" />
1536: $buttons<br />
1537: <textarea $textarea_events style="width:100%" cols="80" rows="44" name="filecont" id="filecont">$filecontents</textarea>
1538: <div id="LC_aftertextarea">
1539: <br />$buttons
1540: <br />
1541: $titledisplay
1542: </div>
1543: </form>
1544: </body>
1545: ENDFOOTER
1546: return ($editfooter,$add_to_onload,$add_to_onresize);;
1547: }
1548:
1549: sub get_target {
1550: my $viewgrades=&Apache::lonnet::allowed('vgr',$env{'request.course.id'});
1551: if ( $env{'request.state'} eq 'published') {
1552: if ( defined($env{'form.grade_target'})
1553: && ($viewgrades == 'F' )) {
1554: return ($env{'form.grade_target'});
1555: } elsif (defined($env{'form.grade_target'})) {
1556: if (($env{'form.grade_target'} eq 'web') ||
1557: ($env{'form.grade_target'} eq 'tex') ) {
1558: return $env{'form.grade_target'}
1559: } else {
1560: return 'web';
1561: }
1562: } else {
1563: return 'web';
1564: }
1565: } elsif ($env{'request.state'} eq 'construct') {
1566: if ( defined($env{'form.grade_target'})) {
1567: return ($env{'form.grade_target'});
1568: } else {
1569: return 'web';
1570: }
1571: } else {
1572: return 'web';
1573: }
1574: }
1575:
1576: sub handler {
1577: my $request=shift;
1578:
1579: my $target=&get_target();
1580:
1581: $Apache::lonxml::debug=$env{'user.debug'};
1582:
1583: &Apache::loncommon::content_type($request,'text/html');
1584: &Apache::loncommon::no_cache($request);
1585: if ($env{'request.state'} eq 'published') {
1586: $request->set_last_modified(&Apache::lonnet::metadata($request->uri,
1587: 'lastrevisiondate'));
1588: }
1589: $request->send_http_header;
1590:
1591: return OK if $request->header_only;
1592:
1593:
1594: my $file=&Apache::lonnet::filelocation("",$request->uri);
1595: my $filetype;
1596: if ($file =~ /\.sty$/) {
1597: $filetype='sty';
1598: } else {
1599: $filetype='html';
1600: }
1601: #
1602: # Edit action? Save file.
1603: #
1604: if (!($env{'request.state'} eq 'published')) {
1605: if ($env{'form.savethisfile'} || $env{'form.viewmode'} || $env{'form.Undo'}) {
1606: my $html_file=&Apache::lonnet::getfile($file);
1607: my $error = &Apache::lonhomework::handle_save_or_undo($request, \$html_file, \$env{'form.filecont'});
1608: }
1609: }
1610: my %mystyle;
1611: my $result = '';
1612: my $filecontents=&Apache::lonnet::getfile($file);
1613: if ($filecontents eq -1) {
1614: my $start_page=&Apache::loncommon::start_page('File Error');
1615: my $end_page=&Apache::loncommon::end_page();
1616: my $fnf=&mt('File not found');
1617: $result=(<<ENDNOTFOUND);
1618: $start_page
1619: <b>$fnf: $file</b>
1620: $end_page
1621: ENDNOTFOUND
1622: $filecontents='';
1623: if ($env{'request.state'} ne 'published') {
1624: if ($filetype eq 'sty') {
1625: $filecontents=&createnewsty();
1626: } else {
1627: $filecontents=&createnewhtml();
1628: }
1629: $env{'form.editmode'}='Edit'; #force edit mode
1630: }
1631: } else {
1632: unless ($env{'request.state'} eq 'published') {
1633: if ($filecontents=~/BEGIN LON-CAPA Internal/) {
1634: &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.'));
1635: }
1636: #
1637: # we are in construction space, see if edit mode forced
1638: &Apache::loncommon::get_unprocessed_cgi($ENV{'QUERY_STRING'},
1639: ['editmode']);
1640: }
1641: if (!$env{'form.editmode'} || $env{'form.viewmode'} || $env{'form.discardview'}) {
1642: &Apache::structuretags::reset_problem_globals();
1643: $result = &Apache::lonxml::xmlparse($request,$target,$filecontents,
1644: '',%mystyle);
1645: # .html files may contain <problem> or <Task> need to clean
1646: # up if it did
1647: &Apache::structuretags::reset_problem_globals();
1648: &Apache::lonhomework::finished_parsing();
1649: &Apache::loncommon::get_unprocessed_cgi($ENV{'QUERY_STRING'},
1650: ['rawmode']);
1651: if ($env{'form.rawmode'}) { $result = $filecontents; }
1652: if ($filetype eq 'sty') {
1653: my $controls =
1654: ($env{'request.state'} eq 'construct') ? &Apache::londefdef::edit_controls()
1655: : '';
1656: my %options = ('bgcolor' => '#FFFFFF');
1657: $result =
1658: &Apache::loncommon::start_page(undef,undef,\%options).
1659: $controls.
1660: $result.
1661: &Apache::loncommon::end_page();
1662: }
1663: }
1664: }
1665:
1666: #
1667: # Edit action? Insert editing commands
1668: #
1669: unless ($env{'request.state'} eq 'published') {
1670: if ($env{'form.editmode'} && (!($env{'form.viewmode'})) && (!($env{'form.discardview'})))
1671: {
1672: my ($edit_info, $add_to_onload, $add_to_onresize)=
1673: &inserteditinfo($filecontents,$filetype);
1674:
1675: my $displayfile=$request->uri;
1676: $displayfile=~s/^\/[^\/]*//;
1677: my %options =
1678: ('add_entries' =>
1679: {'onresize' => $add_to_onresize,
1680: 'onload' => $add_to_onload, });
1681:
1682: if ($env{'environment.remote'} ne 'off') {
1683: $options{'bgcolor'} = '#FFFFFF';
1684: $options{'only_body'} = 1;
1685: }
1686: my $js =
1687: &Apache::edit::js_change_detection().
1688: &Apache::loncommon::resize_textarea_js();
1689: my $start_page = &Apache::loncommon::start_page(undef,$js,
1690: \%options);
1691: $result=$start_page.
1692: &Apache::lonxml::message_location().'<h3>'.
1693: $displayfile.
1694: '</h3>'.
1695: $edit_info.
1696: &Apache::loncommon::end_page();
1697: }
1698: }
1699: if ($filetype eq 'html') { &writeallows($request->uri); }
1700:
1701: &Apache::lonxml::add_messages(\$result);
1702: $request->print($result);
1703:
1704: return OK;
1705: }
1706:
1707: sub display_title {
1708: my $result;
1709: if ($env{'request.state'} eq 'construct') {
1710: my $title=&Apache::lonnet::gettitle();
1711: if (!defined($title) || $title eq '') {
1712: $title = $env{'request.filename'};
1713: $title = substr($title, rindex($title, '/') + 1);
1714: }
1715: $result = "<script type='text/javascript'>top.document.title = '$title - LON-CAPA Construction Space';</script>";
1716: }
1717: return $result;
1718: }
1719:
1720: sub debug {
1721: if ($Apache::lonxml::debug eq "1") {
1722: $|=1;
1723: my $request=$Apache::lonxml::request;
1724: if (!$request) {
1725: eval { $request=Apache->request; };
1726: }
1727: if (!$request) {
1728: eval { $request=Apache2::RequestUtil->request; };
1729: }
1730: $request->print('<font size="-2"><pre>DEBUG:'.&HTML::Entities::encode($_[0],'<>&"')."</pre></font>\n");
1731: #&Apache::lonnet::logthis($_[0]);
1732: }
1733: }
1734:
1735: sub show_error_warn_msg {
1736: if ($env{'request.filename'} eq '/home/httpd/html/res/lib/templates/simpleproblem.problem' &&
1737: &Apache::lonnet::allowed('mdc',$env{'request.course.id'})) {
1738: return 1;
1739: }
1740: return (($Apache::lonxml::debug eq 1) ||
1741: ($env{'request.state'} eq 'construct') ||
1742: ($Apache::lonhomework::browse eq 'F'
1743: &&
1744: $env{'form.show_errors'} eq 'on'));
1745: }
1746:
1747: sub error {
1748: my @errors = @_;
1749:
1750: $errorcount++;
1751:
1752: if (defined($Apache::inputtags::part)) {
1753: if ( @Apache::inputtags::response ) {
1754: push(@errors,
1755: &mt("This error occurred while processing response [_1] in part [_2]",
1756: $Apache::inputtags::response[-1],
1757: $Apache::inputtags::part));
1758: } else {
1759: push(@errors,
1760: &mt("This error occurred while processing part [_1]",
1761: $Apache::inputtags::part));
1762: }
1763: }
1764:
1765: if ( &show_error_warn_msg() ) {
1766: # If printing in construction space, put the error inside <pre></pre>
1767: push(@Apache::lonxml::error_messages,
1768: $Apache::lonxml::warnings_error_header.
1769: "<b>ERROR:</b>".join("<br />\n",@errors)."<br />\n");
1770: $Apache::lonxml::warnings_error_header='';
1771: } else {
1772: my $errormsg;
1773: my ($symb)=&Apache::lonnet::symbread();
1774: if ( !$symb ) {
1775: #public or browsers
1776: $errormsg=&mt("An error occured while processing this resource. The author has been notified.");
1777: }
1778: my $host=$Apache::lonnet::perlvar{'lonHostID'};
1779: push(@errors, "The error occurred on host <tt>$host</tt>");
1780:
1781: my $msg = join('<br />', @errors);
1782:
1783: #notify author
1784: &Apache::lonmsg::author_res_msg($env{'request.filename'},$msg);
1785: #notify course
1786: if ( $symb && $env{'request.course.id'} ) {
1787: my $cnum=$env{'course.'.$env{'request.course.id'}.'.num'};
1788: my $cdom=$env{'course.'.$env{'request.course.id'}.'.domain'};
1789: my (undef,%users)=&Apache::lonmsg::decide_receiver(undef,0,1,1,1);
1790: my $declutter=&Apache::lonnet::declutter($env{'request.filename'});
1791: my $baseurl = &Apache::lonnet::clutter($declutter);
1792: my @userlist;
1793: foreach (keys %users) {
1794: my ($user,$domain) = split(/:/, $_);
1795: push(@userlist,"$user\@$domain");
1796: my $key=$declutter.'_'.$user.'_'.$domain;
1797: my %lastnotified=&Apache::lonnet::get('nohist_xmlerrornotifications',
1798: [$key],
1799: $cdom,$cnum);
1800: my $now=time;
1801: if ($now-$lastnotified{$key}>86400) {
1802: my $title = &Apache::lonnet::gettitle($symb);
1803: my $sentmessage;
1804: &Apache::lonmsg::user_normal_msg($user,$domain,
1805: "Error [$title]",$msg,'',$baseurl,'','',
1806: \$sentmessage,$symb,$title,1);
1807: &Apache::lonnet::put('nohist_xmlerrornotifications',
1808: {$key => $now},
1809: $cdom,$cnum);
1810: }
1811: }
1812: if ($env{'request.role.adv'}) {
1813: $errormsg=&mt("An error occured while processing this resource. The course personnel ([_1]) and the author have been notified.",join(', ',@userlist));
1814: } else {
1815: $errormsg=&mt("An error occured while processing this resource. The instructor has been notified.");
1816: }
1817: }
1818: push(@Apache::lonxml::error_messages,"<b>$errormsg</b> <br />");
1819: }
1820: }
1821:
1822: sub warning {
1823: $warningcount++;
1824:
1825: if ($env{'form.grade_target'} ne 'tex') {
1826: if ( &show_error_warn_msg() ) {
1827: push(@Apache::lonxml::warning_messages,
1828: $Apache::lonxml::warnings_error_header.
1829: "<b>W</b>ARNING<b>:</b>".join('<br />',@_)."<br />\n");
1830: $Apache::lonxml::warnings_error_header='';
1831: }
1832: }
1833: }
1834:
1835: sub info {
1836: if ($env{'form.grade_target'} ne 'tex'
1837: && $env{'request.state'} eq 'construct') {
1838: push(@Apache::lonxml::info_messages,join('<br />',@_)."<br />\n");
1839: }
1840: }
1841:
1842: sub message_location {
1843: return '__LONCAPA_INTERNAL_MESSAGE_LOCATION__';
1844: }
1845:
1846: sub add_messages {
1847: my ($msg)=@_;
1848: my $result=join(' ',
1849: @Apache::lonxml::info_messages,
1850: @Apache::lonxml::error_messages,
1851: @Apache::lonxml::warning_messages);
1852: undef(@Apache::lonxml::info_messages);
1853: undef(@Apache::lonxml::error_messages);
1854: undef(@Apache::lonxml::warning_messages);
1855: $$msg=~s/__LONCAPA_INTERNAL_MESSAGE_LOCATION__/$result/;
1856: $$msg=~s/__LONCAPA_INTERNAL_MESSAGE_LOCATION__//g;
1857: }
1858:
1859: sub get_param {
1860: my ($param,$parstack,$safeeval,$context,$case_insensitive) = @_;
1861: if ( ! $context ) { $context = -1; }
1862: my $args ='';
1863: if ( $#$parstack > (-2-$context) ) { $args=$$parstack[$context]; }
1864: if ( ! $Apache::lonxml::usestyle ) {
1865: $args=$Apache::lonxml::style_values.$args;
1866: }
1867: if ( ! $args ) { return undef; }
1868: if ( $case_insensitive ) {
1869: if ($args =~ s/(my (?:.*))(\$\Q$param\E[,\)])/$1.lc($2)/ei) {
1870: return &Apache::run::run("{$args;".'return $'.$param.'}',
1871: $safeeval); #'
1872: } else {
1873: return undef;
1874: }
1875: } else {
1876: if ( $args =~ /my .*\$\Q$param\E[,\)]/ ) {
1877: return &Apache::run::run("{$args;".'return $'.$param.'}',
1878: $safeeval); #'
1879: } else {
1880: return undef;
1881: }
1882: }
1883: }
1884:
1885: sub get_param_var {
1886: my ($param,$parstack,$safeeval,$context,$case_insensitive) = @_;
1887: if ( ! $context ) { $context = -1; }
1888: my $args ='';
1889: if ( $#$parstack > (-2-$context) ) { $args=$$parstack[$context]; }
1890: if ( ! $Apache::lonxml::usestyle ) {
1891: $args=$Apache::lonxml::style_values.$args;
1892: }
1893: &Apache::lonxml::debug("Args are $args param is $param");
1894: if ($case_insensitive) {
1895: if (! ($args=~s/(my (?:.*))(\$\Q$param\E[,\)])/$1.lc($2)/ei)) {
1896: return undef;
1897: }
1898: } elsif ( $args !~ /my .*\$\Q$param\E[,\)]/ ) { return undef; }
1899: my $value=&Apache::run::run("{$args;".'return $'.$param.'}',$safeeval); #'
1900: &Apache::lonxml::debug("first run is $value");
1901: if ($value =~ /^[\$\@\%][a-zA-Z_]\w*$/) {
1902: &Apache::lonxml::debug("doing second");
1903: my @result=&Apache::run::run("return $value",$safeeval,1);
1904: if (!defined($result[0])) {
1905: return $value
1906: } else {
1907: if (wantarray) { return @result; } else { return $result[0]; }
1908: }
1909: } else {
1910: return $value;
1911: }
1912: }
1913:
1914: sub register_insert_xml {
1915: my $parser = HTML::LCParser->new($Apache::lonnet::perlvar{'lonTabDir'}
1916: .'/insertlist.xml');
1917: my ($tagnum,$in_help)=(0,0);
1918: my @alltags;
1919: my $tag;
1920: while (my $token = $parser->get_token()) {
1921: if ($token->[0] eq 'S') {
1922: my $key;
1923: if ($token->[1] eq 'tag') {
1924: $tag = $token->[2]{'name'};
1925: $insertlist{"$tagnum.tag"} = $tag;
1926: $insertlist{"$tag.num"} = $tagnum;
1927: push(@alltags,$tag);
1928: } elsif ($in_help && $token->[1] eq 'file') {
1929: $key = $tag.'.helpfile';
1930: } elsif ($in_help && $token->[1] eq 'description') {
1931: $key = $tag.'.helpdesc';
1932: } elsif ($token->[1] eq 'description' ||
1933: $token->[1] eq 'color' ||
1934: $token->[1] eq 'show' ) {
1935: $key = $tag.'.'.$token->[1];
1936: } elsif ($token->[1] eq 'insert_sub') {
1937: $key = $tag.'.function';
1938: } elsif ($token->[1] eq 'help') {
1939: $in_help=1;
1940: } elsif ($token->[1] eq 'allow') {
1941: $key = $tag.'.allow';
1942: }
1943: if (defined($key)) {
1944: $insertlist{$key} = $parser->get_text();
1945: $insertlist{$key} =~ s/(^\s*|\s*$ )//gx;
1946: }
1947: } elsif ($token->[0] eq 'E') {
1948: if ($token->[1] eq 'tag') {
1949: undef($tag);
1950: $tagnum++;
1951: } elsif ($token->[1] eq 'help') {
1952: undef($in_help);
1953: }
1954: }
1955: }
1956:
1957: # parse the allows and ignore tags set to <show>no</show>
1958: foreach my $tag (@alltags) {
1959: next if (!exists($insertlist{"$tag.allow"}));
1960: my $allow = $insertlist{"$tag.allow"};
1961: foreach my $element (split(',',$allow)) {
1962: $element =~ s/(^\s*|\s*$ )//gx;
1963: if (!exists($insertlist{"$element.show"})
1964: || $insertlist{"$element.show"} ne 'no') {
1965: push(@{ $insertlist{$tag.'.which'} },$element);
1966: }
1967: }
1968: }
1969: }
1970:
1971: sub register_insert {
1972: return ®ister_insert_xml(@_);
1973: # &dump_insertlist('2');
1974: }
1975:
1976: sub dump_insertlist {
1977: my ($ext) = @_;
1978: open(XML,">/tmp/insertlist.xml.$ext");
1979: print XML ("<insertlist>");
1980: my $i=0;
1981:
1982: while (exists($insertlist{"$i.tag"})) {
1983: my $tag = $insertlist{"$i.tag"};
1984: print XML ("
1985: \t<tag name=\"$tag\">");
1986: if (defined($insertlist{"$tag.description"})) {
1987: print XML ("
1988: \t\t<description>".$insertlist{"$tag.description"}."</description>");
1989: }
1990: if (defined($insertlist{"$tag.color"})) {
1991: print XML ("
1992: \t\t<color>".$insertlist{"$tag.color"}."</color>");
1993: }
1994: if (defined($insertlist{"$tag.function"})) {
1995: print XML ("
1996: \t\t<insert_sub>".$insertlist{"$tag.function"}."</insert_sub>");
1997: }
1998: if (defined($insertlist{"$tag.show"})
1999: && $insertlist{"$tag.show"} ne 'yes') {
2000: print XML ("
2001: \t\t<show>".$insertlist{"$tag.show"}."</show>");
2002: }
2003: if (defined($insertlist{"$tag.helpfile"})) {
2004: print XML ("
2005: \t\t<help>
2006: \t\t\t<file>".$insertlist{"$tag.helpfile"}."</file>");
2007: if ($insertlist{"$tag.helpdesc"} ne '') {
2008: print XML ("
2009: \t\t\t<description>".$insertlist{"$tag.helpdesc"}."</description>");
2010: }
2011: print XML ("
2012: \t\t</help>");
2013: }
2014: if (defined($insertlist{"$tag.which"})) {
2015: print XML ("
2016: \t\t<allow>".join(',',sort(@{ $insertlist{"$tag.which"} }))."</allow>");
2017: }
2018: print XML ("
2019: \t</tag>");
2020: $i++;
2021: }
2022: print XML ("\n</insertlist>\n");
2023: close(XML);
2024: }
2025:
2026: sub description {
2027: my ($token)=@_;
2028: my $tag = &get_tag($token);
2029: return $insertlist{$tag.'.description'};
2030: }
2031:
2032: # Returns a list containing the help file, and the description
2033: sub helpinfo {
2034: my ($token)=@_;
2035: my $tag = &get_tag($token);
2036: return ($insertlist{$tag.'.helpfile'}, $insertlist{$tag.'.helpdesc'});
2037: }
2038:
2039: sub get_tag {
2040: my ($token)=@_;
2041: my $tagnum;
2042: my $tag=$token->[1];
2043: foreach my $namespace (reverse(@Apache::lonxml::namespace)) {
2044: my $testtag = $namespace.'::'.$tag;
2045: $tagnum = $insertlist{"$testtag.num"};
2046: last if (defined($tagnum));
2047: }
2048: if (!defined($tagnum)) {
2049: $tagnum = $Apache::lonxml::insertlist{"$tag.num"};
2050: }
2051: return $insertlist{"$tagnum.tag"};
2052: }
2053:
2054: 1;
2055: __END__
2056:
2057:
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