1: # The LearningOnline Network with CAPA
2: # XML Parser Module
3: #
4: # $Id: lonxml.pm,v 1.459 2007/09/11 23:53:13 albertel Exp $
5: #
6: # Copyright Michigan State University Board of Trustees
7: #
8: # This file is part of the LearningOnline Network with CAPA (LON-CAPA).
9: #
10: # LON-CAPA is free software; you can redistribute it and/or modify
11: # it under the terms of the GNU General Public License as published by
12: # the Free Software Foundation; either version 2 of the License, or
13: # (at your option) any later version.
14: #
15: # LON-CAPA is distributed in the hope that it will be useful,
16: # but WITHOUT ANY WARRANTY; without even the implied warranty of
17: # MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
18: # GNU General Public License for more details.
19: #
20: # You should have received a copy of the GNU General Public License
21: # along with LON-CAPA; if not, write to the Free Software
22: # Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA 02111-1307 USA
23: #
24: # /home/httpd/html/adm/gpl.txt
25: #
26: # http://www.lon-capa.org/
27: #
28: # Copyright for TtHfunc and TtMfunc by Ian Hutchinson.
29: # TtHfunc and TtMfunc (the "Code") may be compiled and linked into
30: # binary executable programs or libraries distributed by the
31: # Michigan State University (the "Licensee"), but any binaries so
32: # distributed are hereby licensed only for use in the context
33: # of a program or computational system for which the Licensee is the
34: # primary author or distributor, and which performs substantial
35: # additional tasks beyond the translation of (La)TeX into HTML.
36: # The C source of the Code may not be distributed by the Licensee
37: # to any other parties under any circumstances.
38: #
39:
40:
41: package Apache::lonxml;
42: use vars
43: qw(@pwd @outputstack $redirection $import @extlinks $metamode $evaluate %insertlist @namespace $errorcount $warningcount);
44: use strict;
45: use LONCAPA;
46: use HTML::LCParser();
47: use HTML::TreeBuilder();
48: use HTML::Entities();
49: use Safe();
50: use Safe::Hole();
51: use Math::Cephes();
52: use Math::Random();
53: use Opcode();
54: use POSIX qw(strftime);
55: use Time::HiRes qw( gettimeofday tv_interval );
56: use Symbol();
57:
58: sub register {
59: my ($space,@taglist) = @_;
60: foreach my $temptag (@taglist) {
61: push(@{ $Apache::lonxml::alltags{$temptag} },$space);
62: }
63: }
64:
65: sub deregister {
66: my ($space,@taglist) = @_;
67: foreach my $temptag (@taglist) {
68: my $tempspace = $Apache::lonxml::alltags{$temptag}[-1];
69: if ($tempspace eq $space) {
70: pop(@{ $Apache::lonxml::alltags{$temptag} });
71: }
72: }
73: #&printalltags();
74: }
75:
76: use Apache::Constants qw(:common);
77: use Apache::lontexconvert();
78: use Apache::style();
79: use Apache::run();
80: use Apache::londefdef();
81: use Apache::scripttag();
82: use Apache::languagetags();
83: use Apache::edit();
84: use Apache::inputtags();
85: use Apache::outputtags();
86: use Apache::lonnet;
87: use Apache::File();
88: use Apache::loncommon();
89: use Apache::lonfeedback();
90: use Apache::lonmsg();
91: use Apache::loncacc();
92: use Apache::lonmaxima();
93: use Apache::lonlocal;
94:
95: #================================================== Main subroutine: xmlparse
96: #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: #internal check on whether to look at style defs
139: $Apache::lonxml::usestyle=1;
140:
141: #locations used to store the parameter string for style substitutions
142: $Apache::lonxml::style_values='';
143: $Apache::lonxml::style_end_values='';
144:
145: #array of ssi calls that need to occur after we are done parsing
146: @Apache::lonxml::ssi_info=();
147:
148: #should we do the postag variable interpolation
149: $Apache::lonxml::post_evaluate=1;
150:
151: #a header message to emit in the case of any generated warning or errors
152: $Apache::lonxml::warnings_error_header='';
153:
154: # Control whether or not LaTeX symbols should be substituted for their
155: # \ style equivalents...this may be turned off e.g. in an verbatim
156: # environment.
157:
158: $Apache::lonxml::substitute_LaTeX_symbols = 1; # Starts out on.
159:
160: sub enable_LaTeX_substitutions {
161: $Apache::lonxml::substitute_LaTeX_symbols = 1;
162: }
163: sub disable_LaTeX_substitutions {
164: $Apache::lonxml::substitute_LaTeX_symbols = 0;
165: }
166:
167: sub xmlend {
168: my ($target,$parser)=@_;
169: my $mode='xml';
170: my $status='OPEN';
171: if ($Apache::lonhomework::parsing_a_problem ||
172: $Apache::lonhomework::parsing_a_task ) {
173: $mode='problem';
174: $status=$Apache::inputtags::status[-1];
175: }
176: my $discussion;
177: &Apache::loncommon::get_unprocessed_cgi($ENV{'QUERY_STRING'},
178: ['LONCAPA_INTERNAL_no_discussion']);
179: if (! exists($env{'form.LONCAPA_INTERNAL_no_discussion'}) ||
180: $env{'form.LONCAPA_INTERNAL_no_discussion'} ne 'true') {
181: $discussion=&Apache::lonfeedback::list_discussion($mode,$status);
182: }
183: if ($target eq 'tex') {
184: $discussion.='<tex>\keephidden{ENDOFPROBLEM}\vskip 0.5mm\noindent\makebox[\textwidth/$number_of_columns][b]{\hrulefill}\end{document}</tex>';
185: &Apache::lonxml::newparser($parser,\$discussion,'');
186: return '';
187: }
188:
189: return $discussion;
190: }
191:
192: sub tokeninputfield {
193: my $defhost=$Apache::lonnet::perlvar{'lonHostID'};
194: $defhost=~tr/a-z/A-Z/;
195: return (<<ENDINPUTFIELD)
196: <script type="text/javascript">
197: function updatetoken() {
198: var comp=new Array;
199: var barcode=unescape(document.tokeninput.barcode.value);
200: comp=barcode.split('*');
201: if (typeof(comp[0])!="undefined") {
202: document.tokeninput.codeone.value=comp[0];
203: }
204: if (typeof(comp[1])!="undefined") {
205: document.tokeninput.codetwo.value=comp[1];
206: }
207: if (typeof(comp[2])!="undefined") {
208: comp[2]=comp[2].toUpperCase();
209: document.tokeninput.codethree.value=comp[2];
210: }
211: document.tokeninput.barcode.value='';
212: }
213: </script>
214: <form method="post" name="tokeninput">
215: <table border="2" bgcolor="#FFFFBB">
216: <tr><th>DocID Checkin</th></tr>
217: <tr><td>
218: <table>
219: <tr>
220: <td>Scan in Barcode</td>
221: <td><input type="text" size="22" name="barcode"
222: onChange="updatetoken()"/></td>
223: </tr>
224: <tr><td><i>or</i> Type in DocID</td>
225: <td>
226: <input type="text" size="5" name="codeone" />
227: <b><font size="+2">*</font></b>
228: <input type="text" size="5" name="codetwo" />
229: <b><font size="+2">*</font></b>
230: <input type="text" size="10" name="codethree" value="$defhost"
231: onChange="this.value=this.value.toUpperCase()" />
232: </td></tr>
233: </table>
234: </td></tr>
235: <tr><td><input type="submit" value="Check in DocID" /></td></tr>
236: </table>
237: </form>
238: ENDINPUTFIELD
239: }
240:
241: sub maketoken {
242: my ($symb,$tuname,$tudom,$tcrsid)=@_;
243: unless ($symb) {
244: $symb=&Apache::lonnet::symbread();
245: }
246: unless ($tuname) {
247: $tuname=$env{'user.name'};
248: $tudom=$env{'user.domain'};
249: $tcrsid=$env{'request.course.id'};
250: }
251:
252: return &Apache::lonnet::checkout($symb,$tuname,$tudom,$tcrsid);
253: }
254:
255: sub printtokenheader {
256: my ($target,$token,$tsymb,$tcrsid,$tudom,$tuname)=@_;
257: unless ($token) { return ''; }
258:
259: my ($symb,$courseid,$domain,$name) = &Apache::lonnet::whichuser();
260: unless ($tsymb) {
261: $tsymb=$symb;
262: }
263: unless ($tuname) {
264: $tuname=$name;
265: $tudom=$domain;
266: $tcrsid=$courseid;
267: }
268:
269: my $plainname=&Apache::loncommon::plainname($tuname,$tudom);
270:
271: if ($target eq 'web') {
272: my %idhash=&Apache::lonnet::idrget($tudom,($tuname));
273: return
274: '<img align="right" src="/cgi-bin/barcode.png?encode='.$token.'" />'.
275: &mt('Checked out for').' '.$plainname.
276: '<br />'.&mt('User').': '.$tuname.' at '.$tudom.
277: '<br />'.&mt('ID').': '.$idhash{$tuname}.
278: '<br />'.&mt('CourseID').': '.$tcrsid.
279: '<br />'.&mt('Course').': '.$env{'course.'.$tcrsid.'.description'}.
280: '<br />'.&mt('DocID').': '.$token.
281: '<br />'.&mt('Time').': '.&Apache::lonlocal::locallocaltime().'<hr />';
282: } else {
283: return $token;
284: }
285: }
286:
287: sub printalltags {
288: my $temp;
289: foreach $temp (sort keys %Apache::lonxml::alltags) {
290: &Apache::lonxml::debug("$temp -- ".
291: join(',',@{ $Apache::lonxml::alltags{$temp} }));
292: }
293: }
294:
295: sub xmlparse {
296: my ($request,$target,$content_file_string,$safeinit,%style_for_target) = @_;
297:
298: &setup_globals($request,$target);
299: &Apache::inputtags::initialize_inputtags();
300: &Apache::bridgetask::initialize_bridgetask();
301: &Apache::outputtags::initialize_outputtags();
302: &Apache::edit::initialize_edit();
303: &Apache::londefdef::initialize_londefdef();
304:
305: #
306: # do we have a course style file?
307: #
308:
309: if ($env{'request.course.id'} && $env{'request.state'} ne 'construct') {
310: my $bodytext=
311: $env{'course.'.$env{'request.course.id'}.'.default_xml_style'};
312: if ($bodytext) {
313: foreach my $file (split(',',$bodytext)) {
314: my $location=&Apache::lonnet::filelocation('',$file);
315: my $styletext=&Apache::lonnet::getfile($location);
316: if ($styletext ne '-1') {
317: %style_for_target = (%style_for_target,
318: &Apache::style::styleparser($target,$styletext));
319: }
320: }
321: }
322: } elsif ($env{'construct.style'}
323: && ($env{'request.state'} eq 'construct')) {
324: my $location=&Apache::lonnet::filelocation('',$env{'construct.style'});
325: my $styletext=&Apache::lonnet::getfile($location);
326: if ($styletext ne '-1') {
327: %style_for_target = (%style_for_target,
328: &Apache::style::styleparser($target,$styletext));
329: }
330: }
331: #&printalltags();
332: my @pars = ();
333: my $pwd=$env{'request.filename'};
334: $pwd =~ s:/[^/]*$::;
335: &newparser(\@pars,\$content_file_string,$pwd);
336:
337: my $safeeval = new Safe;
338: my $safehole = new Safe::Hole;
339: &init_safespace($target,$safeeval,$safehole,$safeinit);
340: #-------------------- Redefinition of the target in the case of compound target
341:
342: ($target, my @tenta) = split('&&',$target);
343:
344: my @stack = ();
345: my @parstack = ();
346: &initdepth();
347: &init_alarm();
348: my $finaloutput = &inner_xmlparse($target,\@stack,\@parstack,\@pars,
349: $safeeval,\%style_for_target,1);
350:
351: if (@stack) {
352: &warning("At end of file some tags were still left unclosed, ".
353: '<tt><'.join('></tt>, <tt><',reverse(@stack)).
354: '></tt>');
355: }
356: if ($env{'request.uri'}) {
357: &writeallows($env{'request.uri'});
358: }
359: &do_registered_ssi();
360: if ($Apache::lonxml::counter_changed) { &store_counter() }
361:
362: &clean_safespace($safeeval);
363:
364: if (@script_var_displays) {
365: $finaloutput .= join('',@script_var_displays);
366: undef(@script_var_displays);
367: }
368:
369: if ($env{'form.return_only_error_and_warning_counts'}) {
370: return "$errorcount:$warningcount";
371: }
372: return $finaloutput;
373: }
374:
375: sub latex_special_symbols {
376: my ($string,$where)=@_;
377: #
378: # If e.g. in verbatim mode, then don't substitute.
379: # but return original string.
380: #
381: if (!($Apache::lonxml::substitute_LaTeX_symbols)) {
382: return $string;
383: }
384: if ($where eq 'header') {
385: $string =~ s/\\/\$\\backslash\$/g; # \ -> $\backslash$ per LaTex line by line pg 10.
386: $string =~ s/(\$|%|\{|\})/\\$1/g;
387: $string=&Apache::lonprintout::character_chart($string);
388: # any & or # leftover should be safe to just escape
389: $string=~s/([^\\])\&/$1\\\&/g;
390: $string=~s/([^\\])\#/$1\\\#/g;
391: $string =~ s/_/\\_/g; # _ -> \_
392: $string =~ s/\^/\\\^{}/g; # ^ -> \^{}
393: } else {
394: $string=~s/\\/\\ensuremath{\\backslash}/g;
395: $string=~s/\\\%|\%/\\\%/g;
396: $string=~s/\\{|{/\\{/g;
397: $string=~s/\\}|}/\\}/g;
398: $string=~s/\\ensuremath\\{\\backslash\\}/\\ensuremath{\\backslash}/g;
399: $string=~s/\\\$|\$/\\\$/g;
400: $string=~s/\\\_|\_/\\\_/g;
401: $string=~s/([^\\]|^)(\~|\^)/$1\\$2\\strut /g;
402: $string=~s/(>|<)/\\ensuremath\{$1\}/g; #more or less
403: $string=&Apache::lonprintout::character_chart($string);
404: # any & or # leftover should be safe to just escape
405: $string=~s/\\\&|\&/\\\&/g;
406: $string=~s/\\\#|\#/\\\#/g;
407: $string=~s/\|/\$\\mid\$/g;
408: #single { or } How to escape?
409: }
410: return $string;
411: }
412:
413: sub inner_xmlparse {
414: my ($target,$stack,$parstack,$pars,$safeeval,$style_for_target,$start)=@_;
415: my $finaloutput = '';
416: my $result;
417: my $token;
418: my $dontpop=0;
419: my $startredirection = $Apache::lonxml::redirection;
420: while ( $#$pars > -1 ) {
421: while ($token = $$pars['-1']->get_token) {
422: if (($token->[0] eq 'T') || ($token->[0] eq 'C') ) {
423: if ($metamode<1) {
424: my $text=$token->[1];
425: if ($token->[0] eq 'C' && $target eq 'tex') {
426: $text = '';
427: # $text = '%'.$text."\n";
428: }
429: $result.=$text;
430: }
431: } elsif (($token->[0] eq 'D')) {
432: if ($metamode<1 && $target eq 'web') {
433: my $text=$token->[1];
434: $result.=$text;
435: }
436: } elsif ($token->[0] eq 'PI') {
437: if ($metamode<1 && $target eq 'web') {
438: $result=$token->[2];
439: }
440: } elsif ($token->[0] eq 'S') {
441: # add tag to stack
442: push (@$stack,$token->[1]);
443: # add parameters list to another stack
444: push (@$parstack,&parstring($token));
445: &increasedepth($token);
446: if ($Apache::lonxml::usestyle &&
447: exists($$style_for_target{$token->[1]})) {
448: $Apache::lonxml::usestyle=0;
449: my $string=$$style_for_target{$token->[1]}.
450: '<LONCAPA_INTERNAL_TURN_STYLE_ON />';
451: &Apache::lonxml::newparser($pars,\$string);
452: $Apache::lonxml::style_values=$$parstack[-1];
453: $Apache::lonxml::style_end_values=$$parstack[-1];
454: } else {
455: $result = &callsub("start_$token->[1]", $target, $token, $stack,
456: $parstack, $pars, $safeeval, $style_for_target);
457: }
458: } elsif ($token->[0] eq 'E') {
459: if ($Apache::lonxml::usestyle &&
460: exists($$style_for_target{'/'."$token->[1]"})) {
461: $Apache::lonxml::usestyle=0;
462: my $string=$$style_for_target{'/'.$token->[1]}.
463: '<LONCAPA_INTERNAL_TURN_STYLE_ON end="'.$token->[1].'" />';
464: &Apache::lonxml::newparser($pars,\$string);
465: $Apache::lonxml::style_values=$Apache::lonxml::style_end_values;
466: $Apache::lonxml::style_end_values='';
467: $dontpop=1;
468: } else {
469: #clear out any tags that didn't end
470: while ($token->[1] ne $$stack['-1'] && ($#$stack > -1)) {
471: my $lasttag=$$stack[-1];
472: if ($token->[1] =~ /^\Q$lasttag\E$/i) {
473: &Apache::lonxml::warning('Using tag </'.$token->[1].'> on line '.$token->[3].' as end tag to <'.$$stack[-1].'>');
474: last;
475: } else {
476: &Apache::lonxml::warning('Found tag </'.$token->[1].'> on line '.$token->[3].' when looking for </'.$$stack[-1].'> in file');
477: &end_tag($stack,$parstack,$token);
478: }
479: }
480: $result = &callsub("end_$token->[1]", $target, $token, $stack,
481: $parstack, $pars,$safeeval, $style_for_target);
482: }
483: } else {
484: &Apache::lonxml::error("Unknown token event :$token->[0]:$token->[1]:");
485: }
486: #evaluate variable refs in result
487: if ($Apache::lonxml::post_evaluate &&$result ne "") {
488: my $extras;
489: if (!$Apache::lonxml::usestyle) {
490: $extras=$Apache::lonxml::style_values;
491: }
492: if ( $#$parstack > -1 ) {
493: $result=&Apache::run::evaluate($result,$safeeval,$extras.$$parstack[-1]);
494: } else {
495: $result= &Apache::run::evaluate($result,$safeeval,$extras);
496: }
497: }
498: $Apache::lonxml::post_evaluate=1;
499:
500: if (($token->[0] eq 'T') || ($token->[0] eq 'C') || ($token->[0] eq 'D') ) {
501: #Style file definitions should be correct
502: if ($target eq 'tex' && ($Apache::lonxml::usestyle)) {
503: $result=&latex_special_symbols($result);
504: }
505: }
506:
507: if ($Apache::lonxml::redirection) {
508: $Apache::lonxml::outputstack['-1'] .= $result;
509: } else {
510: $finaloutput.=$result;
511: }
512: $result = '';
513:
514: if ($token->[0] eq 'E' && !$dontpop) {
515: &end_tag($stack,$parstack,$token);
516: }
517: $dontpop=0;
518: }
519: if ($#$pars > -1) {
520: pop @$pars;
521: pop @Apache::lonxml::pwd;
522: }
523: }
524:
525: # if ($target eq 'meta') {
526: # $finaloutput.=&endredirection;
527: # }
528:
529: if ( $start && $target eq 'grade') { &endredirection(); }
530: if ( $Apache::lonxml::redirection > $startredirection) {
531: while ($Apache::lonxml::redirection > $startredirection) {
532: $finaloutput .= &endredirection();
533: }
534: }
535: if (($ENV{'QUERY_STRING'}) && ($target eq 'web')) {
536: $finaloutput=&afterburn($finaloutput);
537: }
538: return $finaloutput;
539: }
540:
541: ##
542: ## Looks to see if there is a subroutine defined for this tag. If so, call it,
543: ## otherwise do not call it as we do not know what it is.
544: ##
545: sub callsub {
546: my ($sub,$target,$token,$tagstack,$parstack,$parser,$safeeval,$style)=@_;
547: my $currentstring='';
548: my $nodefault;
549: {
550: my $sub1;
551: no strict 'refs';
552: my $tag=$token->[1];
553: # get utterly rid of extended html tags
554: if ($tag=~/^x\-/i) { return ''; }
555: my $space=$Apache::lonxml::alltags{$tag}[-1];
556: if (!$space) {
557: $tag=~tr/A-Z/a-z/;
558: $sub=~tr/A-Z/a-z/;
559: $space=$Apache::lonxml::alltags{$tag}[-1]
560: }
561:
562: my $deleted=0;
563: if (($token->[0] eq 'S') && ($target eq 'modified')) {
564: $deleted=&Apache::edit::handle_delete($space,$target,$token,$tagstack,
565: $parstack,$parser,$safeeval,
566: $style);
567: }
568: if (!$deleted) {
569: if ($space) {
570: #&Apache::lonxml::debug("Calling sub $sub in $space $metamode");
571: $sub1="$space\:\:$sub";
572: ($currentstring,$nodefault) = &$sub1($target,$token,$tagstack,
573: $parstack,$parser,$safeeval,
574: $style);
575: } else {
576: if ($target eq 'tex') {
577: # throw away tag name
578: return '';
579: }
580: #&Apache::lonxml::debug("NOT Calling sub $sub in $space $metamode");
581: if ($metamode <1) {
582: if (defined($token->[4]) && ($metamode < 1)) {
583: $currentstring = $token->[4];
584: } else {
585: $currentstring = $token->[2];
586: }
587: }
588: }
589: # &Apache::lonxml::debug("nodefalt:$nodefault:");
590: if ($currentstring eq '' && $nodefault eq '') {
591: if ($target eq 'edit') {
592: #&Apache::lonxml::debug("doing default edit for $token->[1]");
593: if ($token->[0] eq 'S') {
594: $currentstring = &Apache::edit::tag_start($target,$token);
595: } elsif ($token->[0] eq 'E') {
596: $currentstring = &Apache::edit::tag_end($target,$token);
597: }
598: }
599: }
600: if ($target eq 'modified' && $nodefault eq '') {
601: if ($currentstring eq '') {
602: if ($token->[0] eq 'S') {
603: $currentstring = $token->[4];
604: } elsif ($token->[0] eq 'E') {
605: $currentstring = $token->[2];
606: } else {
607: $currentstring = $token->[2];
608: }
609: }
610: if ($token->[0] eq 'S') {
611: $currentstring.=&Apache::edit::handle_insert();
612: } elsif ($token->[0] eq 'E') {
613: $currentstring.=&Apache::edit::handle_insertafter($token->[1]);
614: }
615: }
616: }
617: use strict 'refs';
618: }
619: return $currentstring;
620: }
621:
622: sub setup_globals {
623: my ($request,$target)=@_;
624: $Apache::lonxml::request=$request;
625: $errorcount=0;
626: $warningcount=0;
627: $Apache::lonxml::default_homework_loaded=0;
628: $Apache::lonxml::usestyle=1;
629: &init_counter();
630: @Apache::lonxml::pwd=();
631: @Apache::lonxml::extlinks=();
632: @script_var_displays=();
633: @Apache::lonxml::ssi_info=();
634: $Apache::lonxml::post_evaluate=1;
635: $Apache::lonxml::warnings_error_header='';
636: $Apache::lonxml::substitute_LaTeX_symbols = 1;
637: if ($target eq 'meta') {
638: $Apache::lonxml::redirection = 0;
639: $Apache::lonxml::metamode = 1;
640: $Apache::lonxml::evaluate = 1;
641: $Apache::lonxml::import = 0;
642: } elsif ($target eq 'answer') {
643: $Apache::lonxml::redirection = 0;
644: $Apache::lonxml::metamode = 1;
645: $Apache::lonxml::evaluate = 1;
646: $Apache::lonxml::import = 1;
647: } elsif ($target eq 'grade') {
648: &startredirection(); #ended in inner_xmlparse on exit
649: $Apache::lonxml::metamode = 0;
650: $Apache::lonxml::evaluate = 1;
651: $Apache::lonxml::import = 1;
652: } elsif ($target eq 'modified') {
653: $Apache::lonxml::redirection = 0;
654: $Apache::lonxml::metamode = 0;
655: $Apache::lonxml::evaluate = 0;
656: $Apache::lonxml::import = 0;
657: } elsif ($target eq 'edit') {
658: $Apache::lonxml::redirection = 0;
659: $Apache::lonxml::metamode = 0;
660: $Apache::lonxml::evaluate = 0;
661: $Apache::lonxml::import = 0;
662: } elsif ($target eq 'analyze') {
663: $Apache::lonxml::redirection = 0;
664: $Apache::lonxml::metamode = 0;
665: $Apache::lonxml::evaluate = 1;
666: $Apache::lonxml::import = 1;
667: } else {
668: $Apache::lonxml::redirection = 0;
669: $Apache::lonxml::metamode = 0;
670: $Apache::lonxml::evaluate = 1;
671: $Apache::lonxml::import = 1;
672: }
673: }
674:
675: sub init_safespace {
676: my ($target,$safeeval,$safehole,$safeinit) = @_;
677: $safeeval->deny_only(':dangerous');
678: $safeeval->reval('use Math::Complex;');
679: $safeeval->permit_only(":default");
680: $safeeval->permit("entereval");
681: $safeeval->permit(":base_math");
682: $safeeval->permit("sort");
683: $safeeval->permit("time");
684: $safeeval->deny("rand");
685: $safeeval->deny("srand");
686: $safeeval->deny(":base_io");
687: $safehole->wrap(\&Apache::scripttag::xmlparse,$safeeval,'&xmlparse');
688: $safehole->wrap(\&Apache::outputtags::multipart,$safeeval,'&multipart');
689: $safehole->wrap(\&Apache::lonnet::EXT,$safeeval,'&EXT');
690: $safehole->wrap(\&Apache::chemresponse::chem_standard_order,$safeeval,
691: '&chem_standard_order');
692: $safehole->wrap(\&Apache::response::check_status,$safeeval,'&check_status');
693:
694: $safehole->wrap(\&Apache::lonmaxima::maxima_eval,$safeeval,'&maxima_eval');
695: $safehole->wrap(\&Apache::lonmaxima::maxima_check,$safeeval,'&maxima_check');
696: $safehole->wrap(\&Apache::lonmaxima::maxima_cas_formula_fix,$safeeval,
697: '&maxima_cas_formula_fix');
698:
699: $safehole->wrap(\&Apache::caparesponse::capa_formula_fix,$safeeval,
700: '&capa_formula_fix');
701:
702: $safehole->wrap(\&Math::Cephes::asin,$safeeval,'&asin');
703: $safehole->wrap(\&Math::Cephes::acos,$safeeval,'&acos');
704: $safehole->wrap(\&Math::Cephes::atan,$safeeval,'&atan');
705: $safehole->wrap(\&Math::Cephes::sinh,$safeeval,'&sinh');
706: $safehole->wrap(\&Math::Cephes::cosh,$safeeval,'&cosh');
707: $safehole->wrap(\&Math::Cephes::tanh,$safeeval,'&tanh');
708: $safehole->wrap(\&Math::Cephes::asinh,$safeeval,'&asinh');
709: $safehole->wrap(\&Math::Cephes::acosh,$safeeval,'&acosh');
710: $safehole->wrap(\&Math::Cephes::atanh,$safeeval,'&atanh');
711: $safehole->wrap(\&Math::Cephes::erf,$safeeval,'&erf');
712: $safehole->wrap(\&Math::Cephes::erfc,$safeeval,'&erfc');
713: $safehole->wrap(\&Math::Cephes::j0,$safeeval,'&j0');
714: $safehole->wrap(\&Math::Cephes::j1,$safeeval,'&j1');
715: $safehole->wrap(\&Math::Cephes::jn,$safeeval,'&jn');
716: $safehole->wrap(\&Math::Cephes::jv,$safeeval,'&jv');
717: $safehole->wrap(\&Math::Cephes::y0,$safeeval,'&y0');
718: $safehole->wrap(\&Math::Cephes::y1,$safeeval,'&y1');
719: $safehole->wrap(\&Math::Cephes::yn,$safeeval,'&yn');
720: $safehole->wrap(\&Math::Cephes::yv,$safeeval,'&yv');
721:
722: $safehole->wrap(\&Math::Cephes::bdtr ,$safeeval,'&bdtr' );
723: $safehole->wrap(\&Math::Cephes::bdtrc ,$safeeval,'&bdtrc' );
724: $safehole->wrap(\&Math::Cephes::bdtri ,$safeeval,'&bdtri' );
725: $safehole->wrap(\&Math::Cephes::btdtr ,$safeeval,'&btdtr' );
726: $safehole->wrap(\&Math::Cephes::chdtr ,$safeeval,'&chdtr' );
727: $safehole->wrap(\&Math::Cephes::chdtrc,$safeeval,'&chdtrc');
728: $safehole->wrap(\&Math::Cephes::chdtri,$safeeval,'&chdtri');
729: $safehole->wrap(\&Math::Cephes::fdtr ,$safeeval,'&fdtr' );
730: $safehole->wrap(\&Math::Cephes::fdtrc ,$safeeval,'&fdtrc' );
731: $safehole->wrap(\&Math::Cephes::fdtri ,$safeeval,'&fdtri' );
732: $safehole->wrap(\&Math::Cephes::gdtr ,$safeeval,'&gdtr' );
733: $safehole->wrap(\&Math::Cephes::gdtrc ,$safeeval,'&gdtrc' );
734: $safehole->wrap(\&Math::Cephes::nbdtr ,$safeeval,'&nbdtr' );
735: $safehole->wrap(\&Math::Cephes::nbdtrc,$safeeval,'&nbdtrc');
736: $safehole->wrap(\&Math::Cephes::nbdtri,$safeeval,'&nbdtri');
737: $safehole->wrap(\&Math::Cephes::ndtr ,$safeeval,'&ndtr' );
738: $safehole->wrap(\&Math::Cephes::ndtri ,$safeeval,'&ndtri' );
739: $safehole->wrap(\&Math::Cephes::pdtr ,$safeeval,'&pdtr' );
740: $safehole->wrap(\&Math::Cephes::pdtrc ,$safeeval,'&pdtrc' );
741: $safehole->wrap(\&Math::Cephes::pdtri ,$safeeval,'&pdtri' );
742: $safehole->wrap(\&Math::Cephes::stdtr ,$safeeval,'&stdtr' );
743: $safehole->wrap(\&Math::Cephes::stdtri,$safeeval,'&stdtri');
744:
745: $safehole->wrap(\&Math::Cephes::Matrix::mat,$safeeval,'&mat');
746: $safehole->wrap(\&Math::Cephes::Matrix::new,$safeeval,
747: '&Math::Cephes::Matrix::new');
748: $safehole->wrap(\&Math::Cephes::Matrix::coef,$safeeval,
749: '&Math::Cephes::Matrix::coef');
750: $safehole->wrap(\&Math::Cephes::Matrix::clr,$safeeval,
751: '&Math::Cephes::Matrix::clr');
752: $safehole->wrap(\&Math::Cephes::Matrix::add,$safeeval,
753: '&Math::Cephes::Matrix::add');
754: $safehole->wrap(\&Math::Cephes::Matrix::sub,$safeeval,
755: '&Math::Cephes::Matrix::sub');
756: $safehole->wrap(\&Math::Cephes::Matrix::mul,$safeeval,
757: '&Math::Cephes::Matrix::mul');
758: $safehole->wrap(\&Math::Cephes::Matrix::div,$safeeval,
759: '&Math::Cephes::Matrix::div');
760: $safehole->wrap(\&Math::Cephes::Matrix::inv,$safeeval,
761: '&Math::Cephes::Matrix::inv');
762: $safehole->wrap(\&Math::Cephes::Matrix::transp,$safeeval,
763: '&Math::Cephes::Matrix::transp');
764: $safehole->wrap(\&Math::Cephes::Matrix::simq,$safeeval,
765: '&Math::Cephes::Matrix::simq');
766: $safehole->wrap(\&Math::Cephes::Matrix::mat_to_vec,$safeeval,
767: '&Math::Cephes::Matrix::mat_to_vec');
768: $safehole->wrap(\&Math::Cephes::Matrix::vec_to_mat,$safeeval,
769: '&Math::Cephes::Matrix::vec_to_mat');
770: $safehole->wrap(\&Math::Cephes::Matrix::check,$safeeval,
771: '&Math::Cephes::Matrix::check');
772: $safehole->wrap(\&Math::Cephes::Matrix::check,$safeeval,
773: '&Math::Cephes::Matrix::check');
774:
775: # $safehole->wrap(\&Math::Cephes::new_fract,$safeeval,'&new_fract');
776: # $safehole->wrap(\&Math::Cephes::radd,$safeeval,'&radd');
777: # $safehole->wrap(\&Math::Cephes::rsub,$safeeval,'&rsub');
778: # $safehole->wrap(\&Math::Cephes::rmul,$safeeval,'&rmul');
779: # $safehole->wrap(\&Math::Cephes::rdiv,$safeeval,'&rdiv');
780: # $safehole->wrap(\&Math::Cephes::euclid,$safeeval,'&euclid');
781:
782: $safehole->wrap(\&Math::Random::random_beta,$safeeval,'&math_random_beta');
783: $safehole->wrap(\&Math::Random::random_chi_square,$safeeval,'&math_random_chi_square');
784: $safehole->wrap(\&Math::Random::random_exponential,$safeeval,'&math_random_exponential');
785: $safehole->wrap(\&Math::Random::random_f,$safeeval,'&math_random_f');
786: $safehole->wrap(\&Math::Random::random_gamma,$safeeval,'&math_random_gamma');
787: $safehole->wrap(\&Math::Random::random_multivariate_normal,$safeeval,'&math_random_multivariate_normal');
788: $safehole->wrap(\&Math::Random::random_multinomial,$safeeval,'&math_random_multinomial');
789: $safehole->wrap(\&Math::Random::random_noncentral_chi_square,$safeeval,'&math_random_noncentral_chi_square');
790: $safehole->wrap(\&Math::Random::random_noncentral_f,$safeeval,'&math_random_noncentral_f');
791: $safehole->wrap(\&Math::Random::random_normal,$safeeval,'&math_random_normal');
792: $safehole->wrap(\&Math::Random::random_permutation,$safeeval,'&math_random_permutation');
793: $safehole->wrap(\&Math::Random::random_permuted_index,$safeeval,'&math_random_permuted_index');
794: $safehole->wrap(\&Math::Random::random_uniform,$safeeval,'&math_random_uniform');
795: $safehole->wrap(\&Math::Random::random_poisson,$safeeval,'&math_random_poisson');
796: $safehole->wrap(\&Math::Random::random_uniform_integer,$safeeval,'&math_random_uniform_integer');
797: $safehole->wrap(\&Math::Random::random_negative_binomial,$safeeval,'&math_random_negative_binomial');
798: $safehole->wrap(\&Math::Random::random_binomial,$safeeval,'&math_random_binomial');
799: $safehole->wrap(\&Math::Random::random_seed_from_phrase,$safeeval,'&random_seed_from_phrase');
800: $safehole->wrap(\&Math::Random::random_set_seed_from_phrase,$safeeval,'&random_set_seed_from_phrase');
801: $safehole->wrap(\&Math::Random::random_get_seed,$safeeval,'&random_get_seed');
802: $safehole->wrap(\&Math::Random::random_set_seed,$safeeval,'&random_set_seed');
803: $safehole->wrap(\&Apache::loncommon::languages,$safeeval,'&languages');
804: $safehole->wrap(\&Apache::lonxml::error,$safeeval,'&LONCAPA_INTERNAL_ERROR');
805: $safehole->wrap(\&Apache::lonxml::debug,$safeeval,'&LONCAPA_INTERNAL_DEBUG');
806: $safehole->wrap(\&Apache::lonnet::logthis,$safeeval,'&LONCAPA_INTERNAL_LOGTHIS');
807: $safehole->wrap(\&Apache::inputtags::finalizeawards,$safeeval,'&LONCAPA_INTERNAL_FINALIZEAWARDS');
808: $safehole->wrap(\&Apache::caparesponse::get_sigrange,$safeeval,'&LONCAPA_INTERNAL_get_sigrange');
809: # use Data::Dumper;
810: # $safehole->wrap(\&Data::Dumper::Dumper,$safeeval,'&LONCAPA_INTERNAL_Dumper');
811: #need to inspect this class of ops
812: # $safeeval->deny(":base_orig");
813: $safeeval->permit("require");
814: $safeinit .= ';$external::target="'.$target.'";';
815: &Apache::run::run($safeinit,$safeeval);
816: &initialize_rndseed($safeeval);
817: }
818:
819: sub clean_safespace {
820: my ($safeeval) = @_;
821: delete_package_recurse($safeeval->{Root});
822: }
823:
824: sub delete_package_recurse {
825: my ($package) = @_;
826: my @subp;
827: {
828: no strict 'refs';
829: while (my ($key,$val) = each(%{*{"$package\::"}})) {
830: if (!defined($val)) { next; }
831: local (*ENTRY) = $val;
832: if (defined *ENTRY{HASH} && $key =~ /::$/ &&
833: $key ne "main::" && $key ne "<none>::")
834: {
835: my ($p) = $package ne "main" ? "$package\::" : "";
836: ($p .= $key) =~ s/::$//;
837: push(@subp,$p);
838: }
839: }
840: }
841: foreach my $p (@subp) {
842: delete_package_recurse($p);
843: }
844: Symbol::delete_package($package);
845: }
846:
847: sub initialize_rndseed {
848: my ($safeeval)=@_;
849: my $rndseed;
850: my ($symb,$courseid,$domain,$name) = &Apache::lonnet::whichuser();
851: $rndseed=&Apache::lonnet::rndseed($symb,$courseid,$domain,$name);
852: my $safeinit = '$external::randomseed="'.$rndseed.'";';
853: &Apache::lonxml::debug("Setting rndseed to $rndseed");
854: &Apache::run::run($safeinit,$safeeval);
855: }
856:
857: sub default_homework_load {
858: my ($safeeval)=@_;
859: &Apache::lonxml::debug('Loading default_homework');
860: my $default=&Apache::lonnet::getfile('/home/httpd/html/res/adm/includes/default_homework.lcpm');
861: if ($default eq -1) {
862: &Apache::lonxml::error("<b>Unable to find <i>default_homework.lcpm</i></b>");
863: } else {
864: &Apache::run::run($default,$safeeval);
865: $Apache::lonxml::default_homework_loaded=1;
866: }
867: }
868:
869: {
870: my $alarm_depth;
871: sub init_alarm {
872: alarm(0);
873: $alarm_depth=0;
874: }
875:
876: sub start_alarm {
877: if ($alarm_depth<1) {
878: my $old=alarm($Apache::lonnet::perlvar{'lonScriptTimeout'});
879: if ($old) {
880: &Apache::lonxml::error("Cancelled an alarm of $old, this shouldn't occur.");
881: }
882: }
883: $alarm_depth++;
884: }
885:
886: sub end_alarm {
887: $alarm_depth--;
888: if ($alarm_depth<1) { alarm(0); }
889: }
890: }
891: my $metamode_was;
892: sub startredirection {
893: if (!$Apache::lonxml::redirection) {
894: $metamode_was=$Apache::lonxml::metamode;
895: }
896: $Apache::lonxml::metamode=0;
897: $Apache::lonxml::redirection++;
898: push (@Apache::lonxml::outputstack, '');
899: }
900:
901: sub endredirection {
902: if (!$Apache::lonxml::redirection) {
903: &Apache::lonxml::error("Endredirection was called before a startredirection, perhaps you have unbalanced tags. Some debugging information:".join ":",caller);
904: return '';
905: }
906: $Apache::lonxml::redirection--;
907: if (!$Apache::lonxml::redirection) {
908: $Apache::lonxml::metamode=$metamode_was;
909: }
910: pop @Apache::lonxml::outputstack;
911: }
912: sub in_redirection {
913: return ($Apache::lonxml::redirection > 0)
914: }
915:
916: sub end_tag {
917: my ($tagstack,$parstack,$token)=@_;
918: pop(@$tagstack);
919: pop(@$parstack);
920: &decreasedepth($token);
921: }
922:
923: sub initdepth {
924: @Apache::lonxml::depthcounter=();
925: undef($Apache::lonxml::last_depth_count);
926: }
927:
928:
929: my @timers;
930: my $lasttime;
931: # @Apache::lonxml::depthcounter -> count of tags that exist so
932: # far at each level
933: # $Apache::lonxml::last_depth_count -> when ascending, need to
934: # remember the count for the level below the current level (for
935: # example going from 1_2 -> 1 -> 1_3 need to remember the 2 )
936:
937: sub increasedepth {
938: my ($token) = @_;
939: push(@Apache::lonxml::depthcounter,$Apache::lonxml::last_depth_count+1);
940: undef($Apache::lonxml::last_depth_count);
941: my $time;
942: if ($Apache::lonxml::debug eq "1") {
943: push(@timers,[&gettimeofday()]);
944: $time=&tv_interval($lasttime);
945: $lasttime=[&gettimeofday()];
946: }
947: my $spacing=' 'x($#Apache::lonxml::depthcounter);
948: $Apache::lonxml::curdepth=join('_',@Apache::lonxml::depthcounter);
949: # &Apache::lonxml::debug("s$spacing$Apache::lonxml::depth : $Apache::lonxml::olddepth : $Apache::lonxml::curdepth : $token->[1] : $time");
950: #print "<br />s $Apache::lonxml::depth : $Apache::lonxml::olddepth : $curdepth : $token->[1]\n";
951: }
952:
953: sub decreasedepth {
954: my ($token) = @_;
955: if ( $#Apache::lonxml::depthcounter == -1) {
956: &Apache::lonxml::warning(&mt("Missing tags, unable to properly run file."));
957: }
958: $Apache::lonxml::last_depth_count = pop(@Apache::lonxml::depthcounter);
959:
960: my ($timer,$time);
961: if ($Apache::lonxml::debug eq "1") {
962: $timer=pop(@timers);
963: $time=&tv_interval($lasttime);
964: $lasttime=[&gettimeofday()];
965: }
966: my $spacing=' 'x($#Apache::lonxml::depthcounter);
967: $Apache::lonxml::curdepth = join('_',@Apache::lonxml::depthcounter);
968: # &Apache::lonxml::debug("e$spacing$Apache::lonxml::depth : $Apache::lonxml::olddepth : $Apache::lonxml::curdepth : $token->[1] : $time : ".&tv_interval($timer));
969: #print "<br />e $Apache::lonxml::depth : $Apache::lonxml::olddepth : $token->[1] : $curdepth\n";
970: }
971:
972: sub get_id {
973: my ($parstack,$safeeval)=@_;
974: my $id= &Apache::lonxml::get_param('id',$parstack,$safeeval);
975: if ($env{'request.state'} eq 'construct' && $id =~ /([._]|[^\w\d\s[:punct:]])/) {
976: &error(&mt("ID "[_1]" contains invalid characters, IDs are only allowed to contain letters, numbers, spaces and -",'<tt>'.$id.'</tt>'));
977: }
978: if ($id =~ /^\s*$/) { $id = $Apache::lonxml::curdepth; }
979: return $id;
980: }
981:
982: sub get_all_text_unbalanced {
983: #there is a copy of this in lonpublisher.pm
984: my($tag,$pars)= @_;
985: my $token;
986: my $result='';
987: $tag='<'.$tag.'>';
988: while ($token = $$pars[-1]->get_token) {
989: if (($token->[0] eq 'T')||($token->[0] eq 'C')||($token->[0] eq 'D')) {
990: if ($token->[0] eq 'T' && $token->[2]) {
991: $result.='<![CDATA['.$token->[1].']]>';
992: } else {
993: $result.=$token->[1];
994: }
995: } elsif ($token->[0] eq 'PI') {
996: $result.=$token->[2];
997: } elsif ($token->[0] eq 'S') {
998: $result.=$token->[4];
999: } elsif ($token->[0] eq 'E') {
1000: $result.=$token->[2];
1001: }
1002: if ($result =~ /\Q$tag\E/is) {
1003: ($result,my $redo)=$result =~ /(.*)\Q$tag\E(.*)/is;
1004: #&Apache::lonxml::debug('Got a winner with leftovers ::'.$2);
1005: #&Apache::lonxml::debug('Result is :'.$1);
1006: $redo=$tag.$redo;
1007: &Apache::lonxml::newparser($pars,\$redo);
1008: last;
1009: }
1010: }
1011: return $result
1012: }
1013:
1014: =pod
1015:
1016: For bubble grading mode and exam bubble printing mode, the tracking of
1017: the current 'bubble line number' is stored in the %env element
1018: 'form.counter', and is modifed and handled by the following routines.
1019:
1020: The value of it is stored in $Apache:lonxml::counter when live and
1021: stored back to env after done.
1022:
1023: =item &increment_counter($increment);
1024:
1025: Increments the internal counter environment variable a specified amount
1026:
1027: Optional Arguments:
1028: $increment - amount to increment by (defaults to 1)
1029:
1030: =cut
1031:
1032: sub increment_counter {
1033: my ($increment) = @_;
1034: if (defined($increment) && $increment gt 0) {
1035: $Apache::lonxml::counter+=$increment;
1036: } else {
1037: $Apache::lonxml::counter++;
1038: }
1039: $Apache::lonxml::counter_changed=1;
1040: }
1041:
1042: =pod
1043:
1044: =item &init_counter($increment);
1045:
1046: Initialize the internal counter environment variable
1047:
1048: =cut
1049:
1050: sub init_counter {
1051: if ($env{'request.state'} eq 'construct') {
1052: $Apache::lonxml::counter=1;
1053: $Apache::lonxml::counter_changed=1;
1054: } elsif (defined($env{'form.counter'})) {
1055: $Apache::lonxml::counter=$env{'form.counter'};
1056: $Apache::lonxml::counter_changed=0;
1057: } else {
1058: $Apache::lonxml::counter=1;
1059: $Apache::lonxml::counter_changed=1;
1060: }
1061: }
1062:
1063: sub store_counter {
1064: &Apache::lonnet::appenv(('form.counter' => $Apache::lonxml::counter));
1065: $Apache::lonxml::counter_changed=0;
1066: return '';
1067: }
1068:
1069: {
1070: my $state;
1071: sub clear_problem_counter {
1072: undef($state);
1073: &Apache::lonnet::delenv('form.counter');
1074: &Apache::lonxml::init_counter();
1075: &Apache::lonxml::store_counter();
1076: }
1077:
1078: sub remember_problem_counter {
1079: &Apache::lonnet::transfer_profile_to_env(undef,undef,1);
1080: $state = $env{'form.counter'};
1081: }
1082:
1083: sub restore_problem_counter {
1084: if (defined($state)) {
1085: &Apache::lonnet::appenv(('form.counter' => $state));
1086: }
1087: }
1088: sub get_problem_counter {
1089: if ($Apache::lonxml::counter_changed) { &store_counter() }
1090: &Apache::lonnet::transfer_profile_to_env(undef,undef,1);
1091: return $env{'form.counter'};
1092: }
1093: }
1094:
1095: sub get_all_text {
1096: my($tag,$pars,$style)= @_;
1097: my $gotfullstack=1;
1098: if (ref($pars) ne 'ARRAY') {
1099: $gotfullstack=0;
1100: $pars=[$pars];
1101: }
1102: if (ref($style) ne 'HASH') {
1103: $style={};
1104: }
1105: my $depth=0;
1106: my $token;
1107: my $result='';
1108: if ( $tag =~ m:^/: ) {
1109: my $tag=substr($tag,1);
1110: #&Apache::lonxml::debug("have:$tag:");
1111: my $top_empty=0;
1112: while (($depth >=0) && ($#$pars > -1) && (!$top_empty)) {
1113: while (($depth >=0) && ($token = $$pars[-1]->get_token)) {
1114: #&Apache::lonxml::debug("e token:$token->[0]:$depth:$token->[1]:".$#$pars.":".$#Apache::lonxml::pwd);
1115: if (($token->[0] eq 'T')||($token->[0] eq 'C')||($token->[0] eq 'D')) {
1116: if ($token->[2]) {
1117: $result.='<![CDATA['.$token->[1].']]>';
1118: } else {
1119: $result.=$token->[1];
1120: }
1121: } elsif ($token->[0] eq 'PI') {
1122: $result.=$token->[2];
1123: } elsif ($token->[0] eq 'S') {
1124: if ($token->[1] =~ /^\Q$tag\E$/i) { $depth++; }
1125: if ($token->[1] =~ /^LONCAPA_INTERNAL_TURN_STYLE_ON$/) { $Apache::lonxml::usestyle=1; }
1126: if ($token->[1] =~ /^LONCAPA_INTERNAL_TURN_STYLE_OFF$/) { $Apache::lonxml::usestyle=0; }
1127: $result.=$token->[4];
1128: } elsif ($token->[0] eq 'E') {
1129: if ( $token->[1] =~ /^\Q$tag\E$/i) { $depth--; }
1130: #skip sending back the last end tag
1131: if ($depth == 0 && exists($$style{'/'.$token->[1]}) && $Apache::lonxml::usestyle) {
1132: my $string=
1133: '<LONCAPA_INTERNAL_TURN_STYLE_OFF end="yes" />'.
1134: $$style{'/'.$token->[1]}.
1135: $token->[2].
1136: '<LONCAPA_INTERNAL_TURN_STYLE_ON />';
1137: &Apache::lonxml::newparser($pars,\$string);
1138: #&Apache::lonxml::debug("reParsing $string");
1139: next;
1140: }
1141: if ($depth > -1) {
1142: $result.=$token->[2];
1143: } else {
1144: $$pars[-1]->unget_token($token);
1145: }
1146: }
1147: }
1148: if (($depth >=0) && ($#$pars == 0) ) { $top_empty=1; }
1149: if (($depth >=0) && ($#$pars > 0) ) {
1150: pop(@$pars);
1151: pop(@Apache::lonxml::pwd);
1152: }
1153: }
1154: if ($top_empty && $depth >= 0) {
1155: #never found the end tag ran out of text, throw error send back blank
1156: &error('Never found end tag for <'.$tag.
1157: '> current string <pre>'.
1158: &HTML::Entities::encode($result,'<>&"').
1159: '</pre>');
1160: if ($gotfullstack) {
1161: my $newstring='</'.$tag.'>'.$result;
1162: &Apache::lonxml::newparser($pars,\$newstring);
1163: }
1164: $result='';
1165: }
1166: } else {
1167: while ($#$pars > -1) {
1168: while ($token = $$pars[-1]->get_token) {
1169: #&Apache::lonxml::debug("s token:$token->[0]:$depth:$token->[1]");
1170: if (($token->[0] eq 'T')||($token->[0] eq 'C')||
1171: ($token->[0] eq 'D')) {
1172: if ($token->[2]) {
1173: $result.='<![CDATA['.$token->[1].']]>';
1174: } else {
1175: $result.=$token->[1];
1176: }
1177: } elsif ($token->[0] eq 'PI') {
1178: $result.=$token->[2];
1179: } elsif ($token->[0] eq 'S') {
1180: if ( $token->[1] =~ /^\Q$tag\E$/i) {
1181: $$pars[-1]->unget_token($token); last;
1182: } else {
1183: $result.=$token->[4];
1184: }
1185: if ($token->[1] =~ /^LONCAPA_INTERNAL_TURN_STYLE_ON$/) { $Apache::lonxml::usestyle=1; }
1186: if ($token->[1] =~ /^LONCAPA_INTERNAL_TURN_STYLE_OFF$/) { $Apache::lonxml::usestyle=0; }
1187: } elsif ($token->[0] eq 'E') {
1188: $result.=$token->[2];
1189: }
1190: }
1191: if (($#$pars > 0) ) {
1192: pop(@$pars);
1193: pop(@Apache::lonxml::pwd);
1194: } else { last; }
1195: }
1196: }
1197: #&Apache::lonxml::debug("Exit:$result:");
1198: return $result
1199: }
1200:
1201: sub newparser {
1202: my ($parser,$contentref,$dir) = @_;
1203: push (@$parser,HTML::LCParser->new($contentref));
1204: $$parser[-1]->xml_mode(1);
1205: $$parser[-1]->marked_sections(1);
1206: if ( $dir eq '' ) {
1207: push (@Apache::lonxml::pwd, $Apache::lonxml::pwd[$#Apache::lonxml::pwd]);
1208: } else {
1209: push (@Apache::lonxml::pwd, $dir);
1210: }
1211: }
1212:
1213: sub parstring {
1214: my ($token) = @_;
1215: my (@vars,@values);
1216: foreach my $attr (@{$token->[3]}) {
1217: if ($attr!~/\W/) {
1218: my $val=$token->[2]->{$attr};
1219: $val =~ s/([\%\@\\\"\'])/\\$1/g;
1220: $val =~ s/(\$[^\{a-zA-Z_])/\\$1/g;
1221: $val =~ s/(\$)$/\\$1/;
1222: #if ($val =~ m/^[\%\@]/) { $val="\\".$val; }
1223: push(@vars,"\$$attr");
1224: push(@values,"\"$val\"");
1225: }
1226: }
1227: my $var_init =
1228: (@vars) ? 'my ('.join(',',@vars).') = ('.join(',',@values).');'
1229: : '';
1230: return $var_init;
1231: }
1232:
1233: sub extlink {
1234: my ($res,$exact)=@_;
1235: if (!$exact) {
1236: $res=&Apache::lonnet::hreflocation($Apache::lonxml::pwd[-1],$res);
1237: }
1238: push(@Apache::lonxml::extlinks,$res)
1239: }
1240:
1241: sub writeallows {
1242: unless ($#extlinks>=0) { return; }
1243: my $thisurl = &Apache::lonnet::clutter(shift);
1244: if ($env{'httpref.'.$thisurl}) {
1245: $thisurl=$env{'httpref.'.$thisurl};
1246: }
1247: my $thisdir=$thisurl;
1248: $thisdir=~s/\/[^\/]+$//;
1249: my %httpref=();
1250: foreach (@extlinks) {
1251: $httpref{'httpref.'.
1252: &Apache::lonnet::hreflocation($thisdir,&unescape($_))}=$thisurl;
1253: }
1254: @extlinks=();
1255: &Apache::lonnet::appenv(%httpref);
1256: }
1257:
1258: sub register_ssi {
1259: my ($url,%form)=@_;
1260: push (@Apache::lonxml::ssi_info,{'url'=>$url,'form'=>\%form});
1261: return '';
1262: }
1263:
1264: sub do_registered_ssi {
1265: foreach my $info (@Apache::lonxml::ssi_info) {
1266: my %form=%{ $info->{'form'}};
1267: my $url=$info->{'url'};
1268: &Apache::lonnet::ssi($url,%form);
1269: }
1270: }
1271:
1272: sub add_script_result {
1273: my ($display) = @_;
1274: push(@script_var_displays, $display);
1275: }
1276:
1277: #
1278: # Afterburner handles anchors, highlights and links
1279: #
1280: sub afterburn {
1281: my $result=shift;
1282: &Apache::loncommon::get_unprocessed_cgi($ENV{'QUERY_STRING'},
1283: ['highlight','anchor','link']);
1284: if ($env{'form.highlight'}) {
1285: foreach (split(/\,/,$env{'form.highlight'})) {
1286: my $anchorname=$_;
1287: my $matchthis=$anchorname;
1288: $matchthis=~s/\_+/\\s\+/g;
1289: $result=~s/(\Q$matchthis\E)/\<font color=\"red\"\>$1\<\/font\>/gs;
1290: }
1291: }
1292: if ($env{'form.link'}) {
1293: foreach (split(/\,/,$env{'form.link'})) {
1294: my ($anchorname,$linkurl)=split(/\>/,$_);
1295: my $matchthis=$anchorname;
1296: $matchthis=~s/\_+/\\s\+/g;
1297: $result=~s/(\Q$matchthis\E)/\<a href=\"$linkurl\"\>$1\<\/a\>/gs;
1298: }
1299: }
1300: if ($env{'form.anchor'}) {
1301: my $anchorname=$env{'form.anchor'};
1302: my $matchthis=$anchorname;
1303: $matchthis=~s/\_+/\\s\+/g;
1304: $result=~s/(\Q$matchthis\E)/\<a name=\"$anchorname\"\>$1\<\/a\>/s;
1305: $result.=(<<"ENDSCRIPT");
1306: <script type="text/javascript">
1307: document.location.hash='$anchorname';
1308: </script>
1309: ENDSCRIPT
1310: }
1311: return $result;
1312: }
1313:
1314: sub storefile {
1315: my ($file,$contents)=@_;
1316: &Apache::lonnet::correct_line_ends(\$contents);
1317: if (my $fh=Apache::File->new('>'.$file)) {
1318: print $fh $contents;
1319: $fh->close();
1320: return 1;
1321: } else {
1322: &warning("Unable to save file $file");
1323: return 0;
1324: }
1325: }
1326:
1327: sub createnewhtml {
1328: my $title=&mt('Title of document goes here');
1329: my $body=&mt('Body of document goes here');
1330: my $filecontents=(<<SIMPLECONTENT);
1331: <html>
1332: <head>
1333: <title>$title</title>
1334: </head>
1335: <body bgcolor="#FFFFFF">
1336: $body
1337: </body>
1338: </html>
1339: SIMPLECONTENT
1340: return $filecontents;
1341: }
1342:
1343: sub createnewsty {
1344: my $filecontents=(<<SIMPLECONTENT);
1345: <definetag name="">
1346: <render>
1347: <web></web>
1348: <tex></tex>
1349: </render>
1350: </definetag>
1351: SIMPLECONTENT
1352: return $filecontents;
1353: }
1354:
1355:
1356: sub inserteditinfo {
1357: my ($filecontents,$filetype)=@_;
1358: $filecontents = &HTML::Entities::encode($filecontents,'<>&"');
1359: # my $editheader='<a href="#editsection">Edit below</a><hr />';
1360: my $xml_help = '';
1361: my $initialize='';
1362: my $textarea_id = 'filecont';
1363: my ($add_to_onload, $add_to_onresize);
1364: my $addbuttons=&Apache::lonhtmlcommon::htmlareaaddbuttons();
1365: $initialize=&Apache::lonhtmlcommon::spellheader();
1366: if ($filetype eq 'html'
1367: && (!&Apache::lonhtmlcommon::htmlareablocked() &&
1368: &Apache::lonhtmlcommon::htmlareabrowser())) {
1369: $textarea_id .= '_htmlarea';
1370: $initialize.=(<<FULLPAGE);
1371: <script type="text/javascript">
1372: $addbuttons
1373:
1374: HTMLArea.loadPlugin("FullPage");
1375:
1376: function initDocument() {
1377: var editor=new HTMLArea("filecont",config);
1378: editor.registerPlugin(FullPage);
1379: editor.generate();
1380: setTimeout(
1381: function () {
1382: HTMLArea._addEvents(editor._doc,
1383: ["keypress","mousedown"], unClean);
1384: editor._iframe.id = '$textarea_id';
1385: resize_textarea('$textarea_id','LC_aftertextarea');
1386: },300);
1387: }
1388: </script>
1389: FULLPAGE
1390: } else {
1391: $initialize.=(<<FULLPAGE);
1392: <script type="text/javascript">
1393: $addbuttons
1394: function initDocument() {
1395: resize_textarea('$textarea_id','LC_aftertextarea');
1396: }
1397: </script>
1398: FULLPAGE
1399: }
1400:
1401: $add_to_onload = 'initDocument();';
1402: $add_to_onresize = "resize_textarea('$textarea_id','LC_aftertextarea');";
1403:
1404: if ($filetype eq 'html') {
1405: $xml_help=&Apache::loncommon::helpLatexCheatsheet();
1406: }
1407:
1408: my $cleanbut = '';
1409:
1410: my $titledisplay=&display_title();
1411: my %lt=&Apache::lonlocal::texthash('st' => 'Save and Edit',
1412: 'vi' => 'Save and View',
1413: 'dv' => 'Discard Edits and View',
1414: 'un' => 'undo',
1415: 'ed' => 'Edit');
1416: my $buttons=(<<BUTTONS);
1417: $cleanbut
1418: <input type="submit" name="discardview" accesskey="d" value="$lt{'dv'}" />
1419: <input type="submit" name="Undo" accesskey="u" value="$lt{'un'}" /><hr />
1420: <input type="submit" name="savethisfile" accesskey="s" value="$lt{'st'}" />
1421: <input type="submit" name="viewmode" accesskey="v" value="$lt{'vi'}" />
1422: BUTTONS
1423: $buttons.=&Apache::lonhtmlcommon::spelllink('xmledit','filecont');
1424: my $textarea_events = &Apache::edit::element_change_detection();
1425: my $form_events = &Apache::edit::form_change_detection();
1426: my $editfooter=(<<ENDFOOTER);
1427: $initialize
1428: <hr />
1429: <a name="editsection" />
1430: <form $form_events method="post" name="xmledit">
1431: $xml_help
1432: <input type="hidden" name="editmode" value="$lt{'ed'}" />
1433: $buttons<br />
1434: <textarea $textarea_events style="width:100%" cols="80" rows="44" name="filecont" id="filecont">$filecontents</textarea>
1435: <div id="LC_aftertextarea">
1436: <br />$buttons
1437: <br />
1438: $titledisplay
1439: </div>
1440: </form>
1441: </body>
1442: ENDFOOTER
1443: return ($editfooter,$add_to_onload,$add_to_onresize);;
1444: }
1445:
1446: sub get_target {
1447: my $viewgrades=&Apache::lonnet::allowed('vgr',$env{'request.course.id'});
1448: if ( $env{'request.state'} eq 'published') {
1449: if ( defined($env{'form.grade_target'})
1450: && ($viewgrades == 'F' )) {
1451: return ($env{'form.grade_target'});
1452: } elsif (defined($env{'form.grade_target'})) {
1453: if (($env{'form.grade_target'} eq 'web') ||
1454: ($env{'form.grade_target'} eq 'tex') ) {
1455: return $env{'form.grade_target'}
1456: } else {
1457: return 'web';
1458: }
1459: } else {
1460: return 'web';
1461: }
1462: } elsif ($env{'request.state'} eq 'construct') {
1463: if ( defined($env{'form.grade_target'})) {
1464: return ($env{'form.grade_target'});
1465: } else {
1466: return 'web';
1467: }
1468: } else {
1469: return 'web';
1470: }
1471: }
1472:
1473: sub handler {
1474: my $request=shift;
1475:
1476: my $target=&get_target();
1477:
1478: $Apache::lonxml::debug=$env{'user.debug'};
1479:
1480: &Apache::loncommon::content_type($request,'text/html');
1481: &Apache::loncommon::no_cache($request);
1482: if ($env{'request.state'} eq 'published') {
1483: $request->set_last_modified(&Apache::lonnet::metadata($request->uri,
1484: 'lastrevisiondate'));
1485: }
1486: $request->send_http_header;
1487:
1488: return OK if $request->header_only;
1489:
1490:
1491: my $file=&Apache::lonnet::filelocation("",$request->uri);
1492: my $filetype;
1493: if ($file =~ /\.sty$/) {
1494: $filetype='sty';
1495: } else {
1496: $filetype='html';
1497: }
1498: #
1499: # Edit action? Save file.
1500: #
1501: if (!($env{'request.state'} eq 'published')) {
1502: if ($env{'form.savethisfile'} || $env{'form.viewmode'} || $env{'form.Undo'}) {
1503: my $html_file=&Apache::lonnet::getfile($file);
1504: my $error = &Apache::lonhomework::handle_save_or_undo($request, \$html_file, \$env{'form.filecont'});
1505: }
1506: }
1507: my %mystyle;
1508: my $result = '';
1509: my $filecontents=&Apache::lonnet::getfile($file);
1510: if ($filecontents eq -1) {
1511: my $start_page=&Apache::loncommon::start_page('File Error');
1512: my $end_page=&Apache::loncommon::end_page();
1513: my $fnf=&mt('File not found');
1514: $result=(<<ENDNOTFOUND);
1515: $start_page
1516: <b>$fnf: $file</b>
1517: $end_page
1518: ENDNOTFOUND
1519: $filecontents='';
1520: if ($env{'request.state'} ne 'published') {
1521: if ($filetype eq 'sty') {
1522: $filecontents=&createnewsty();
1523: } else {
1524: $filecontents=&createnewhtml();
1525: }
1526: $env{'form.editmode'}='Edit'; #force edit mode
1527: }
1528: } else {
1529: unless ($env{'request.state'} eq 'published') {
1530: if ($filecontents=~/BEGIN LON-CAPA Internal/) {
1531: &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.'));
1532: }
1533: #
1534: # we are in construction space, see if edit mode forced
1535: &Apache::loncommon::get_unprocessed_cgi($ENV{'QUERY_STRING'},
1536: ['editmode']);
1537: }
1538: if (!$env{'form.editmode'} || $env{'form.viewmode'} || $env{'form.discardview'}) {
1539: &Apache::structuretags::reset_problem_globals();
1540: $result = &Apache::lonxml::xmlparse($request,$target,$filecontents,
1541: '',%mystyle);
1542: # .html files may contain <problem> or <Task> need to clean
1543: # up if it did
1544: &Apache::structuretags::reset_problem_globals();
1545: &Apache::lonhomework::finished_parsing();
1546: &Apache::loncommon::get_unprocessed_cgi($ENV{'QUERY_STRING'},
1547: ['rawmode']);
1548: if ($env{'form.rawmode'}) { $result = $filecontents; }
1549: if ($filetype eq 'sty') {
1550: my $controls =
1551: ($env{'request.state'} eq 'construct') ? &Apache::londefdef::edit_controls()
1552: : '';
1553: my %options = ('bgcolor' => '#FFFFFF');
1554: $result =
1555: &Apache::loncommon::start_page(undef,undef,\%options).
1556: $controls.
1557: $result.
1558: &Apache::loncommon::end_page();
1559: }
1560: }
1561: }
1562:
1563: #
1564: # Edit action? Insert editing commands
1565: #
1566: unless ($env{'request.state'} eq 'published') {
1567: if ($env{'form.editmode'} && (!($env{'form.viewmode'})) && (!($env{'form.discardview'})))
1568: {
1569: my ($edit_info, $add_to_onload, $add_to_onresize)=
1570: &inserteditinfo($filecontents,$filetype);
1571:
1572: my $displayfile=$request->uri;
1573: $displayfile=~s/^\/[^\/]*//;
1574: my %options =
1575: ('add_entries' =>
1576: {'onresize' => $add_to_onresize,
1577: 'onload' => $add_to_onload, });
1578:
1579: if ($env{'environment.remote'} ne 'off') {
1580: $options{'bgcolor'} = '#FFFFFF';
1581: $options{'only_body'} = 1;
1582: }
1583: my $js =
1584: &Apache::edit::js_change_detection().
1585: &Apache::loncommon::resize_textarea_js();
1586: my $start_page = &Apache::loncommon::start_page(undef,$js,
1587: \%options);
1588: $result=$start_page.
1589: &Apache::lonxml::message_location().'<h3>'.
1590: $displayfile.
1591: '</h3>'.
1592: $edit_info.
1593: &Apache::loncommon::end_page();
1594: }
1595: }
1596: if ($filetype eq 'html') { &writeallows($request->uri); }
1597:
1598: &Apache::lonxml::add_messages(\$result);
1599: $request->print($result);
1600:
1601: return OK;
1602: }
1603:
1604: sub display_title {
1605: my $result;
1606: if ($env{'request.state'} eq 'construct') {
1607: my $title=&Apache::lonnet::gettitle();
1608: if (!defined($title) || $title eq '') {
1609: $title = $env{'request.filename'};
1610: $title = substr($title, rindex($title, '/') + 1);
1611: }
1612: $result = "<script type='text/javascript'>top.document.title = '$title - LON-CAPA Construction Space';</script>";
1613: }
1614: return $result;
1615: }
1616:
1617: sub debug {
1618: if ($Apache::lonxml::debug eq "1") {
1619: $|=1;
1620: my $request=$Apache::lonxml::request;
1621: if (!$request) {
1622: eval { $request=Apache->request; };
1623: }
1624: if (!$request) {
1625: eval { $request=Apache2::RequestUtil->request; };
1626: }
1627: $request->print('<font size="-2"><pre>DEBUG:'.&HTML::Entities::encode($_[0],'<>&"')."</pre></font>\n");
1628: #&Apache::lonnet::logthis($_[0]);
1629: }
1630: }
1631:
1632: sub show_error_warn_msg {
1633: if ($env{'request.filename'} eq '/home/httpd/html/res/lib/templates/simpleproblem.problem' &&
1634: &Apache::lonnet::allowed('mdc',$env{'request.course.id'})) {
1635: return 1;
1636: }
1637: return (($Apache::lonxml::debug eq 1) ||
1638: ($env{'request.state'} eq 'construct') ||
1639: ($Apache::lonhomework::browse eq 'F'
1640: &&
1641: $env{'form.show_errors'} eq 'on'));
1642: }
1643:
1644: sub error {
1645: my @errors = @_;
1646:
1647: $errorcount++;
1648:
1649: if (defined($Apache::inputtags::part)) {
1650: if ( @Apache::inputtags::response ) {
1651: push(@errors,
1652: &mt("This error occurred while processing response [_1] in part [_2]",
1653: $Apache::inputtags::response[-1],
1654: $Apache::inputtags::part));
1655: } else {
1656: push(@errors,
1657: &mt("This error occurred while processing part [_1]",
1658: $Apache::inputtags::part));
1659: }
1660: }
1661:
1662: if ( &show_error_warn_msg() ) {
1663: # If printing in construction space, put the error inside <pre></pre>
1664: push(@Apache::lonxml::error_messages,
1665: $Apache::lonxml::warnings_error_header.
1666: "<b>ERROR:</b>".join("<br />\n",@errors)."<br />\n");
1667: $Apache::lonxml::warnings_error_header='';
1668: } else {
1669: my $errormsg;
1670: my ($symb)=&Apache::lonnet::symbread();
1671: if ( !$symb ) {
1672: #public or browsers
1673: $errormsg=&mt("An error occured while processing this resource. The author has been notified.");
1674: }
1675: my $host=$Apache::lonnet::perlvar{'lonHostID'};
1676: push(@errors, "The error occurred on host <tt>$host</tt>");
1677:
1678: my $msg = join('<br />', @errors);
1679:
1680: #notify author
1681: &Apache::lonmsg::author_res_msg($env{'request.filename'},$msg);
1682: #notify course
1683: if ( $symb && $env{'request.course.id'} ) {
1684: my $cnum=$env{'course.'.$env{'request.course.id'}.'.num'};
1685: my $cdom=$env{'course.'.$env{'request.course.id'}.'.domain'};
1686: my (undef,%users)=&Apache::lonmsg::decide_receiver(undef,0,1,1,1);
1687: my $declutter=&Apache::lonnet::declutter($env{'request.filename'});
1688: my $baseurl = &Apache::lonnet::clutter($declutter);
1689: my @userlist;
1690: foreach (keys %users) {
1691: my ($user,$domain) = split(/:/, $_);
1692: push(@userlist,"$user\@$domain");
1693: my $key=$declutter.'_'.$user.'_'.$domain;
1694: my %lastnotified=&Apache::lonnet::get('nohist_xmlerrornotifications',
1695: [$key],
1696: $cdom,$cnum);
1697: my $now=time;
1698: if ($now-$lastnotified{$key}>86400) {
1699: my $title = &Apache::lonnet::gettitle($symb);
1700: my $sentmessage;
1701: &Apache::lonmsg::user_normal_msg($user,$domain,
1702: "Error [$title]",$msg,'',$baseurl,'','',
1703: \$sentmessage,$symb,$title,1);
1704: &Apache::lonnet::put('nohist_xmlerrornotifications',
1705: {$key => $now},
1706: $cdom,$cnum);
1707: }
1708: }
1709: if ($env{'request.role.adv'}) {
1710: $errormsg=&mt("An error occured while processing this resource. The course personnel ([_1]) and the author have been notified.",join(', ',@userlist));
1711: } else {
1712: $errormsg=&mt("An error occured while processing this resource. The instructor has been notified.");
1713: }
1714: }
1715: push(@Apache::lonxml::error_messages,"<b>$errormsg</b> <br />");
1716: }
1717: }
1718:
1719: sub warning {
1720: $warningcount++;
1721:
1722: if ($env{'form.grade_target'} ne 'tex') {
1723: if ( &show_error_warn_msg() ) {
1724: push(@Apache::lonxml::warning_messages,
1725: $Apache::lonxml::warnings_error_header.
1726: "<b>W</b>ARNING<b>:</b>".join('<br />',@_)."<br />\n");
1727: $Apache::lonxml::warnings_error_header='';
1728: }
1729: }
1730: }
1731:
1732: sub info {
1733: if ($env{'form.grade_target'} ne 'tex'
1734: && $env{'request.state'} eq 'construct') {
1735: push(@Apache::lonxml::info_messages,join('<br />',@_)."<br />\n");
1736: }
1737: }
1738:
1739: sub message_location {
1740: return '__LONCAPA_INTERNAL_MESSAGE_LOCATION__';
1741: }
1742:
1743: sub add_messages {
1744: my ($msg)=@_;
1745: my $result=join(' ',
1746: @Apache::lonxml::info_messages,
1747: @Apache::lonxml::error_messages,
1748: @Apache::lonxml::warning_messages);
1749: undef(@Apache::lonxml::info_messages);
1750: undef(@Apache::lonxml::error_messages);
1751: undef(@Apache::lonxml::warning_messages);
1752: $$msg=~s/__LONCAPA_INTERNAL_MESSAGE_LOCATION__/$result/;
1753: $$msg=~s/__LONCAPA_INTERNAL_MESSAGE_LOCATION__//g;
1754: }
1755:
1756: sub get_param {
1757: my ($param,$parstack,$safeeval,$context,$case_insensitive) = @_;
1758: if ( ! $context ) { $context = -1; }
1759: my $args ='';
1760: if ( $#$parstack > (-2-$context) ) { $args=$$parstack[$context]; }
1761: if ( ! $Apache::lonxml::usestyle ) {
1762: $args=$Apache::lonxml::style_values.$args;
1763: }
1764: if ( ! $args ) { return undef; }
1765: if ( $case_insensitive ) {
1766: if ($args =~ s/(my (?:.*))(\$\Q$param\E[,\)])/$1.lc($2)/ei) {
1767: return &Apache::run::run("{$args;".'return $'.$param.'}',
1768: $safeeval); #'
1769: } else {
1770: return undef;
1771: }
1772: } else {
1773: if ( $args =~ /my .*\$\Q$param\E[,\)]/ ) {
1774: return &Apache::run::run("{$args;".'return $'.$param.'}',
1775: $safeeval); #'
1776: } else {
1777: return undef;
1778: }
1779: }
1780: }
1781:
1782: sub get_param_var {
1783: my ($param,$parstack,$safeeval,$context,$case_insensitive) = @_;
1784: if ( ! $context ) { $context = -1; }
1785: my $args ='';
1786: if ( $#$parstack > (-2-$context) ) { $args=$$parstack[$context]; }
1787: if ( ! $Apache::lonxml::usestyle ) {
1788: $args=$Apache::lonxml::style_values.$args;
1789: }
1790: &Apache::lonxml::debug("Args are $args param is $param");
1791: if ($case_insensitive) {
1792: if (! ($args=~s/(my (?:.*))(\$\Q$param\E[,\)])/$1.lc($2)/ei)) {
1793: return undef;
1794: }
1795: } elsif ( $args !~ /my .*\$\Q$param\E[,\)]/ ) { return undef; }
1796: my $value=&Apache::run::run("{$args;".'return $'.$param.'}',$safeeval); #'
1797: &Apache::lonxml::debug("first run is $value");
1798: if ($value =~ /^[\$\@\%][a-zA-Z_]\w*$/) {
1799: &Apache::lonxml::debug("doing second");
1800: my @result=&Apache::run::run("return $value",$safeeval,1);
1801: if (!defined($result[0])) {
1802: return $value
1803: } else {
1804: if (wantarray) { return @result; } else { return $result[0]; }
1805: }
1806: } else {
1807: return $value;
1808: }
1809: }
1810:
1811: sub register_insert_xml {
1812: my $parser = HTML::LCParser->new($Apache::lonnet::perlvar{'lonTabDir'}
1813: .'/insertlist.xml');
1814: my ($tagnum,$in_help)=(0,0);
1815: my @alltags;
1816: my $tag;
1817: while (my $token = $parser->get_token()) {
1818: if ($token->[0] eq 'S') {
1819: my $key;
1820: if ($token->[1] eq 'tag') {
1821: $tag = $token->[2]{'name'};
1822: $insertlist{"$tagnum.tag"} = $tag;
1823: $insertlist{"$tag.num"} = $tagnum;
1824: push(@alltags,$tag);
1825: } elsif ($in_help && $token->[1] eq 'file') {
1826: $key = $tag.'.helpfile';
1827: } elsif ($in_help && $token->[1] eq 'description') {
1828: $key = $tag.'.helpdesc';
1829: } elsif ($token->[1] eq 'description' ||
1830: $token->[1] eq 'color' ||
1831: $token->[1] eq 'show' ) {
1832: $key = $tag.'.'.$token->[1];
1833: } elsif ($token->[1] eq 'insert_sub') {
1834: $key = $tag.'.function';
1835: } elsif ($token->[1] eq 'help') {
1836: $in_help=1;
1837: } elsif ($token->[1] eq 'allow') {
1838: $key = $tag.'.allow';
1839: }
1840: if (defined($key)) {
1841: $insertlist{$key} = $parser->get_text();
1842: $insertlist{$key} =~ s/(^\s*|\s*$ )//gx;
1843: }
1844: } elsif ($token->[0] eq 'E') {
1845: if ($token->[1] eq 'tag') {
1846: undef($tag);
1847: $tagnum++;
1848: } elsif ($token->[1] eq 'help') {
1849: undef($in_help);
1850: }
1851: }
1852: }
1853:
1854: # parse the allows and ignore tags set to <show>no</show>
1855: foreach my $tag (@alltags) {
1856: next if (!exists($insertlist{"$tag.allow"}));
1857: my $allow = $insertlist{"$tag.allow"};
1858: foreach my $element (split(',',$allow)) {
1859: $element =~ s/(^\s*|\s*$ )//gx;
1860: if (!exists($insertlist{"$element.show"})
1861: || $insertlist{"$element.show"} ne 'no') {
1862: push(@{ $insertlist{$tag.'.which'} },$element);
1863: }
1864: }
1865: }
1866: }
1867:
1868: sub register_insert {
1869: return ®ister_insert_xml(@_);
1870: # &dump_insertlist('2');
1871: }
1872:
1873: sub dump_insertlist {
1874: my ($ext) = @_;
1875: open(XML,">/tmp/insertlist.xml.$ext");
1876: print XML ("<insertlist>");
1877: my $i=0;
1878:
1879: while (exists($insertlist{"$i.tag"})) {
1880: my $tag = $insertlist{"$i.tag"};
1881: print XML ("
1882: \t<tag name=\"$tag\">");
1883: if (defined($insertlist{"$tag.description"})) {
1884: print XML ("
1885: \t\t<description>".$insertlist{"$tag.description"}."</description>");
1886: }
1887: if (defined($insertlist{"$tag.color"})) {
1888: print XML ("
1889: \t\t<color>".$insertlist{"$tag.color"}."</color>");
1890: }
1891: if (defined($insertlist{"$tag.function"})) {
1892: print XML ("
1893: \t\t<insert_sub>".$insertlist{"$tag.function"}."</insert_sub>");
1894: }
1895: if (defined($insertlist{"$tag.show"})
1896: && $insertlist{"$tag.show"} ne 'yes') {
1897: print XML ("
1898: \t\t<show>".$insertlist{"$tag.show"}."</show>");
1899: }
1900: if (defined($insertlist{"$tag.helpfile"})) {
1901: print XML ("
1902: \t\t<help>
1903: \t\t\t<file>".$insertlist{"$tag.helpfile"}."</file>");
1904: if ($insertlist{"$tag.helpdesc"} ne '') {
1905: print XML ("
1906: \t\t\t<description>".$insertlist{"$tag.helpdesc"}."</description>");
1907: }
1908: print XML ("
1909: \t\t</help>");
1910: }
1911: if (defined($insertlist{"$tag.which"})) {
1912: print XML ("
1913: \t\t<allow>".join(',',sort(@{ $insertlist{"$tag.which"} }))."</allow>");
1914: }
1915: print XML ("
1916: \t</tag>");
1917: $i++;
1918: }
1919: print XML ("\n</insertlist>\n");
1920: close(XML);
1921: }
1922:
1923: sub description {
1924: my ($token)=@_;
1925: my $tag = &get_tag($token);
1926: return $insertlist{$tag.'.description'};
1927: }
1928:
1929: # Returns a list containing the help file, and the description
1930: sub helpinfo {
1931: my ($token)=@_;
1932: my $tag = &get_tag($token);
1933: return ($insertlist{$tag.'.helpfile'}, $insertlist{$tag.'.helpdesc'});
1934: }
1935:
1936: sub get_tag {
1937: my ($token)=@_;
1938: my $tagnum;
1939: my $tag=$token->[1];
1940: foreach my $namespace (reverse(@Apache::lonxml::namespace)) {
1941: my $testtag = $namespace.'::'.$tag;
1942: $tagnum = $insertlist{"$testtag.num"};
1943: last if (defined($tagnum));
1944: }
1945: if (!defined($tagnum)) {
1946: $tagnum = $Apache::lonxml::insertlist{"$tag.num"};
1947: }
1948: return $insertlist{"$tagnum.tag"};
1949: }
1950:
1951: 1;
1952: __END__
1953:
1954:
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