1: # The LearningOnline Network with CAPA
2: # XML Parser Module
3: #
4: # $Id: lonxml.pm,v 1.478 2008/05/28 01:32:59 www Exp $
5: #
6: # Copyright Michigan State University Board of Trustees
7: #
8: # This file is part of the LearningOnline Network with CAPA (LON-CAPA).
9: #
10: # LON-CAPA is free software; you can redistribute it and/or modify
11: # it under the terms of the GNU General Public License as published by
12: # the Free Software Foundation; either version 2 of the License, or
13: # (at your option) any later version.
14: #
15: # LON-CAPA is distributed in the hope that it will be useful,
16: # but WITHOUT ANY WARRANTY; without even the implied warranty of
17: # MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
18: # GNU General Public License for more details.
19: #
20: # You should have received a copy of the GNU General Public License
21: # along with LON-CAPA; if not, write to the Free Software
22: # Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA 02111-1307 USA
23: #
24: # /home/httpd/html/adm/gpl.txt
25: #
26: # http://www.lon-capa.org/
27: #
28: # Copyright for TtHfunc and TtMfunc by Ian Hutchinson.
29: # TtHfunc and TtMfunc (the "Code") may be compiled and linked into
30: # binary executable programs or libraries distributed by the
31: # Michigan State University (the "Licensee"), but any binaries so
32: # distributed are hereby licensed only for use in the context
33: # of a program or computational system for which the Licensee is the
34: # primary author or distributor, and which performs substantial
35: # additional tasks beyond the translation of (La)TeX into HTML.
36: # The C source of the Code may not be distributed by the Licensee
37: # to any other parties under any circumstances.
38: #
39:
40:
41: package Apache::lonxml;
42: use vars
43: qw(@pwd @outputstack $redirection $import @extlinks $metamode $evaluate %insertlist @namespace $errorcount $warningcount);
44: use strict;
45: use LONCAPA;
46: use HTML::LCParser();
47: use HTML::TreeBuilder();
48: use HTML::Entities();
49: use Safe();
50: use Safe::Hole();
51: use Math::Cephes();
52: use Math::Random();
53: use Opcode();
54: use POSIX qw(strftime);
55: use Time::HiRes qw( gettimeofday tv_interval );
56: use Symbol();
57:
58: sub register {
59: my ($space,@taglist) = @_;
60: foreach my $temptag (@taglist) {
61: push(@{ $Apache::lonxml::alltags{$temptag} },$space);
62: }
63: }
64:
65: sub deregister {
66: my ($space,@taglist) = @_;
67: foreach my $temptag (@taglist) {
68: my $tempspace = $Apache::lonxml::alltags{$temptag}[-1];
69: if ($tempspace eq $space) {
70: pop(@{ $Apache::lonxml::alltags{$temptag} });
71: }
72: }
73: #&printalltags();
74: }
75:
76: use Apache::Constants qw(:common);
77: use Apache::lontexconvert();
78: use Apache::style();
79: use Apache::run();
80: use Apache::londefdef();
81: use Apache::scripttag();
82: use Apache::languagetags();
83: use Apache::edit();
84: use Apache::inputtags();
85: use Apache::outputtags();
86: use Apache::lonnet;
87: use Apache::File();
88: use Apache::loncommon();
89: use Apache::lonfeedback();
90: use Apache::lonmsg();
91: use Apache::loncacc();
92: use Apache::lonmaxima();
93: use Apache::lonlocal;
94:
95: #==================================== Main subroutine: xmlparse
96:
97: #debugging control, to turn on debugging modify the correct handler
98:
99: $Apache::lonxml::debug=0;
100:
101: # keeps count of the number of warnings and errors generated in a parse
102: $warningcount=0;
103: $errorcount=0;
104:
105: #path to the directory containing the file currently being processed
106: @pwd=();
107:
108: #these two are used for capturing a subset of the output for later processing,
109: #don't touch them directly use &startredirection and &endredirection
110: @outputstack = ();
111: $redirection = 0;
112:
113: #controls wheter the <import> tag actually does
114: $import = 1;
115: @extlinks=();
116:
117: # meta mode is a bit weird only some output is to be turned off
118: #<output> tag turns metamode off (defined in londefdef.pm)
119: $metamode = 0;
120:
121: # turns on and of run::evaluate actually derefencing var refs
122: $evaluate = 1;
123:
124: # data structure for eidt mode, determines what tags can go into what other tags
125: %insertlist=();
126:
127: # stores the list of active tag namespaces
128: @namespace=();
129:
130: # stores all Scrit Vars displays for later showing
131: my @script_var_displays=();
132:
133: # a pointer the the Apache request object
134: $Apache::lonxml::request='';
135:
136: # a problem number counter, and check on ether it is used
137: $Apache::lonxml::counter=1;
138: $Apache::lonxml::counter_changed=0;
139:
140: # Part counter hash. In analysis mode, the
141: # problems can use this to record which parts increment the counter
142: # by how much. The counter subs will maintain this hash via
143: # their optional part parameters. Note that the assumption is that
144: # analysis is done in one request and therefore it is not necessary to
145: # save this information request-to-request.
146:
147:
148: %Apache::lonxml::counters_per_part = ();
149:
150: #internal check on whether to look at style defs
151: $Apache::lonxml::usestyle=1;
152:
153: #locations used to store the parameter string for style substitutions
154: $Apache::lonxml::style_values='';
155: $Apache::lonxml::style_end_values='';
156:
157: #array of ssi calls that need to occur after we are done parsing
158: @Apache::lonxml::ssi_info=();
159:
160: #should we do the postag variable interpolation
161: $Apache::lonxml::post_evaluate=1;
162:
163: #a header message to emit in the case of any generated warning or errors
164: $Apache::lonxml::warnings_error_header='';
165:
166: # Control whether or not LaTeX symbols should be substituted for their
167: # \ style equivalents...this may be turned off e.g. in an verbatim
168: # environment.
169:
170: $Apache::lonxml::substitute_LaTeX_symbols = 1; # Starts out on.
171:
172: sub enable_LaTeX_substitutions {
173: $Apache::lonxml::substitute_LaTeX_symbols = 1;
174: }
175: sub disable_LaTeX_substitutions {
176: $Apache::lonxml::substitute_LaTeX_symbols = 0;
177: }
178:
179: sub xmlend {
180: my ($target,$parser)=@_;
181: my $mode='xml';
182: my $status='OPEN';
183: if ($Apache::lonhomework::parsing_a_problem ||
184: $Apache::lonhomework::parsing_a_task ) {
185: $mode='problem';
186: $status=$Apache::inputtags::status[-1];
187: }
188: my $discussion;
189: &Apache::loncommon::get_unprocessed_cgi($ENV{'QUERY_STRING'},
190: ['LONCAPA_INTERNAL_no_discussion']);
191: if (! exists($env{'form.LONCAPA_INTERNAL_no_discussion'}) ||
192: $env{'form.LONCAPA_INTERNAL_no_discussion'} ne 'true') {
193: $discussion=&Apache::lonfeedback::list_discussion($mode,$status);
194: }
195: if ($target eq 'tex') {
196: $discussion.='<tex>\keephidden{ENDOFPROBLEM}\vskip 0.5mm\noindent\makebox[\textwidth/$number_of_columns][b]{\hrulefill}\end{document}</tex>';
197: &Apache::lonxml::newparser($parser,\$discussion,'');
198: return '';
199: }
200:
201: return $discussion;
202: }
203:
204: sub tokeninputfield {
205: my $defhost=$Apache::lonnet::perlvar{'lonHostID'};
206: $defhost=~tr/a-z/A-Z/;
207: return (<<ENDINPUTFIELD)
208: <script type="text/javascript">
209: function updatetoken() {
210: var comp=new Array;
211: var barcode=unescape(document.tokeninput.barcode.value);
212: comp=barcode.split('*');
213: if (typeof(comp[0])!="undefined") {
214: document.tokeninput.codeone.value=comp[0];
215: }
216: if (typeof(comp[1])!="undefined") {
217: document.tokeninput.codetwo.value=comp[1];
218: }
219: if (typeof(comp[2])!="undefined") {
220: comp[2]=comp[2].toUpperCase();
221: document.tokeninput.codethree.value=comp[2];
222: }
223: document.tokeninput.barcode.value='';
224: }
225: </script>
226: <form method="post" name="tokeninput">
227: <table border="2" bgcolor="#FFFFBB">
228: <tr><th>DocID Checkin</th></tr>
229: <tr><td>
230: <table>
231: <tr>
232: <td>Scan in Barcode</td>
233: <td><input type="text" size="22" name="barcode"
234: onChange="updatetoken()"/></td>
235: </tr>
236: <tr><td><i>or</i> Type in DocID</td>
237: <td>
238: <input type="text" size="5" name="codeone" />
239: <b><font size="+2">*</font></b>
240: <input type="text" size="5" name="codetwo" />
241: <b><font size="+2">*</font></b>
242: <input type="text" size="10" name="codethree" value="$defhost"
243: onChange="this.value=this.value.toUpperCase()" />
244: </td></tr>
245: </table>
246: </td></tr>
247: <tr><td><input type="submit" value="Check in DocID" /></td></tr>
248: </table>
249: </form>
250: ENDINPUTFIELD
251: }
252:
253: sub maketoken {
254: my ($symb,$tuname,$tudom,$tcrsid)=@_;
255: unless ($symb) {
256: $symb=&Apache::lonnet::symbread();
257: }
258: unless ($tuname) {
259: $tuname=$env{'user.name'};
260: $tudom=$env{'user.domain'};
261: $tcrsid=$env{'request.course.id'};
262: }
263:
264: return &Apache::lonnet::checkout($symb,$tuname,$tudom,$tcrsid);
265: }
266:
267: sub printtokenheader {
268: my ($target,$token,$tsymb,$tcrsid,$tudom,$tuname)=@_;
269: unless ($token) { return ''; }
270:
271: my ($symb,$courseid,$domain,$name) = &Apache::lonnet::whichuser();
272: unless ($tsymb) {
273: $tsymb=$symb;
274: }
275: unless ($tuname) {
276: $tuname=$name;
277: $tudom=$domain;
278: $tcrsid=$courseid;
279: }
280:
281: my $plainname=&Apache::loncommon::plainname($tuname,$tudom);
282:
283: if ($target eq 'web') {
284: my %idhash=&Apache::lonnet::idrget($tudom,($tuname));
285: return
286: '<img align="right" src="/cgi-bin/barcode.png?encode='.$token.'" />'.
287: &mt('Checked out for').' '.$plainname.
288: '<br />'.&mt('User').': '.$tuname.' at '.$tudom.
289: '<br />'.&mt('ID').': '.$idhash{$tuname}.
290: '<br />'.&mt('CourseID').': '.$tcrsid.
291: '<br />'.&mt('Course').': '.$env{'course.'.$tcrsid.'.description'}.
292: '<br />'.&mt('DocID').': '.$token.
293: '<br />'.&mt('Time').': '.&Apache::lonlocal::locallocaltime().'<hr />';
294: } else {
295: return $token;
296: }
297: }
298:
299: sub printalltags {
300: my $temp;
301: foreach $temp (sort keys %Apache::lonxml::alltags) {
302: &Apache::lonxml::debug("$temp -- ".
303: join(',',@{ $Apache::lonxml::alltags{$temp} }));
304: }
305: }
306:
307: sub xmlparse {
308: my ($request,$target,$content_file_string,$safeinit,%style_for_target) = @_;
309:
310: &setup_globals($request,$target);
311: &Apache::inputtags::initialize_inputtags();
312: &Apache::bridgetask::initialize_bridgetask();
313: &Apache::outputtags::initialize_outputtags();
314: &Apache::edit::initialize_edit();
315: &Apache::londefdef::initialize_londefdef();
316:
317: #
318: # do we have a course style file?
319: #
320:
321: if ($env{'request.course.id'} && $env{'request.state'} ne 'construct') {
322: my $bodytext=
323: $env{'course.'.$env{'request.course.id'}.'.default_xml_style'};
324: if ($bodytext) {
325: foreach my $file (split(',',$bodytext)) {
326: my $location=&Apache::lonnet::filelocation('',$file);
327: my $styletext=&Apache::lonnet::getfile($location);
328: if ($styletext ne '-1') {
329: %style_for_target = (%style_for_target,
330: &Apache::style::styleparser($target,$styletext));
331: }
332: }
333: }
334: } elsif ($env{'construct.style'}
335: && ($env{'request.state'} eq 'construct')) {
336: my $location=&Apache::lonnet::filelocation('',$env{'construct.style'});
337: my $styletext=&Apache::lonnet::getfile($location);
338: if ($styletext ne '-1') {
339: %style_for_target = (%style_for_target,
340: &Apache::style::styleparser($target,$styletext));
341: }
342: }
343: #&printalltags();
344: my @pars = ();
345: my $pwd=$env{'request.filename'};
346: $pwd =~ s:/[^/]*$::;
347: &newparser(\@pars,\$content_file_string,$pwd);
348:
349: my $safeeval = new Safe;
350: my $safehole = new Safe::Hole;
351: &init_safespace($target,$safeeval,$safehole,$safeinit);
352: #-------------------- Redefinition of the target in the case of compound target
353:
354: ($target, my @tenta) = split('&&',$target);
355:
356: my @stack = ();
357: my @parstack = ();
358: &initdepth();
359: &init_alarm();
360: my $finaloutput = &inner_xmlparse($target,\@stack,\@parstack,\@pars,
361: $safeeval,\%style_for_target,1);
362:
363: if (@stack) {
364: &warning("At end of file some tags were still left unclosed, ".
365: '<tt><'.join('></tt>, <tt><',reverse(@stack)).
366: '></tt>');
367: }
368: if ($env{'request.uri'}) {
369: &writeallows($env{'request.uri'});
370: }
371: &do_registered_ssi();
372: if ($Apache::lonxml::counter_changed) { &store_counter() }
373:
374: &clean_safespace($safeeval);
375:
376: if (@script_var_displays) {
377: $finaloutput .= join('',@script_var_displays);
378: undef(@script_var_displays);
379: }
380: &init_state();
381: if ($env{'form.return_only_error_and_warning_counts'}) {
382: if ($env{'request.filename'}=~/\.(html|htm|xml)$/i) {
383: my $error=&verify_html($content_file_string);
384: if ($error) { $errorcount++; }
385: }
386: return "$errorcount:$warningcount";
387: }
388: return $finaloutput;
389: }
390:
391: sub latex_special_symbols {
392: my ($string,$where)=@_;
393: #
394: # If e.g. in verbatim mode, then don't substitute.
395: # but return original string.
396: #
397: if (!($Apache::lonxml::substitute_LaTeX_symbols)) {
398: return $string;
399: }
400: if ($where eq 'header') {
401: $string =~ s/\\/\$\\backslash\$/g; # \ -> $\backslash$ per LaTex line by line pg 10.
402: $string =~ s/(\$|%|\{|\})/\\$1/g;
403: $string=&Apache::lonprintout::character_chart($string);
404: # any & or # leftover should be safe to just escape
405: $string=~s/([^\\])\&/$1\\\&/g;
406: $string=~s/([^\\])\#/$1\\\#/g;
407: $string =~ s/_/\\_/g; # _ -> \_
408: $string =~ s/\^/\\\^{}/g; # ^ -> \^{}
409: } else {
410: $string=~s/\\/\\ensuremath{\\backslash}/g;
411: $string=~s/\\\%|\%/\\\%/g;
412: $string=~s/\\{|{/\\{/g;
413: $string=~s/\\}|}/\\}/g;
414: $string=~s/\\ensuremath\\{\\backslash\\}/\\ensuremath{\\backslash}/g;
415: $string=~s/\\\$|\$/\\\$/g;
416: $string=~s/\\\_|\_/\\\_/g;
417: $string=~s/([^\\]|^)(\~|\^)/$1\\$2\\strut /g;
418: $string=~s/(>|<)/\\ensuremath\{$1\}/g; #more or less
419: $string=&Apache::lonprintout::character_chart($string);
420: # any & or # leftover should be safe to just escape
421: $string=~s/\\\&|\&/\\\&/g;
422: $string=~s/\\\#|\#/\\\#/g;
423: $string=~s/\|/\$\\mid\$/g;
424: #single { or } How to escape?
425: }
426: return $string;
427: }
428:
429: sub inner_xmlparse {
430: my ($target,$stack,$parstack,$pars,$safeeval,$style_for_target,$start)=@_;
431: my $finaloutput = '';
432: my $result;
433: my $token;
434: my $dontpop=0;
435: my $startredirection = $Apache::lonxml::redirection;
436: while ( $#$pars > -1 ) {
437: while ($token = $$pars['-1']->get_token) {
438: if (($token->[0] eq 'T') || ($token->[0] eq 'C') ) {
439: if ($metamode<1) {
440: my $text=$token->[1];
441: if ($token->[0] eq 'C' && $target eq 'tex') {
442: $text = '';
443: # $text = '%'.$text."\n";
444: }
445: $result.=$text;
446: }
447: } elsif (($token->[0] eq 'D')) {
448: if ($metamode<1 && $target eq 'web') {
449: my $text=$token->[1];
450: $result.=$text;
451: }
452: } elsif ($token->[0] eq 'PI') {
453: if ($metamode<1 && $target eq 'web') {
454: $result=$token->[2];
455: }
456: } elsif ($token->[0] eq 'S') {
457: # add tag to stack
458: push (@$stack,$token->[1]);
459: # add parameters list to another stack
460: push (@$parstack,&parstring($token));
461: &increasedepth($token);
462: if ($Apache::lonxml::usestyle &&
463: exists($$style_for_target{$token->[1]})) {
464: $Apache::lonxml::usestyle=0;
465: my $string=$$style_for_target{$token->[1]}.
466: '<LONCAPA_INTERNAL_TURN_STYLE_ON />';
467: &Apache::lonxml::newparser($pars,\$string);
468: $Apache::lonxml::style_values=$$parstack[-1];
469: $Apache::lonxml::style_end_values=$$parstack[-1];
470: } else {
471: $result = &callsub("start_$token->[1]", $target, $token, $stack,
472: $parstack, $pars, $safeeval, $style_for_target);
473: }
474: } elsif ($token->[0] eq 'E') {
475: if ($Apache::lonxml::usestyle &&
476: exists($$style_for_target{'/'."$token->[1]"})) {
477: $Apache::lonxml::usestyle=0;
478: my $string=$$style_for_target{'/'.$token->[1]}.
479: '<LONCAPA_INTERNAL_TURN_STYLE_ON end="'.$token->[1].'" />';
480: &Apache::lonxml::newparser($pars,\$string);
481: $Apache::lonxml::style_values=$Apache::lonxml::style_end_values;
482: $Apache::lonxml::style_end_values='';
483: $dontpop=1;
484: } else {
485: #clear out any tags that didn't end
486: while ($token->[1] ne $$stack['-1'] && ($#$stack > -1)) {
487: my $lasttag=$$stack[-1];
488: if ($token->[1] =~ /^\Q$lasttag\E$/i) {
489: &Apache::lonxml::warning('Using tag </'.$token->[1].'> on line '.$token->[3].' as end tag to <'.$$stack[-1].'>');
490: last;
491: } else {
492: &Apache::lonxml::warning('Found tag </'.$token->[1].'> on line '.$token->[3].' when looking for </'.$$stack[-1].'> in file');
493: &end_tag($stack,$parstack,$token);
494: }
495: }
496: $result = &callsub("end_$token->[1]", $target, $token, $stack,
497: $parstack, $pars,$safeeval, $style_for_target);
498: }
499: } else {
500: &Apache::lonxml::error("Unknown token event :$token->[0]:$token->[1]:");
501: }
502: #evaluate variable refs in result
503: if ($Apache::lonxml::post_evaluate &&$result ne "") {
504: my $extras;
505: if (!$Apache::lonxml::usestyle) {
506: $extras=$Apache::lonxml::style_values;
507: }
508: if ( $#$parstack > -1 ) {
509: $result=&Apache::run::evaluate($result,$safeeval,$extras.$$parstack[-1]);
510: } else {
511: $result= &Apache::run::evaluate($result,$safeeval,$extras);
512: }
513: }
514: $Apache::lonxml::post_evaluate=1;
515:
516: if (($token->[0] eq 'T') || ($token->[0] eq 'C') || ($token->[0] eq 'D') ) {
517: #Style file definitions should be correct
518: if ($target eq 'tex' && ($Apache::lonxml::usestyle)) {
519: $result=&latex_special_symbols($result);
520: }
521: }
522:
523: if ($Apache::lonxml::redirection) {
524: $Apache::lonxml::outputstack['-1'] .= $result;
525: } else {
526: $finaloutput.=$result;
527: }
528: $result = '';
529:
530: if ($token->[0] eq 'E' && !$dontpop) {
531: &end_tag($stack,$parstack,$token);
532: }
533: $dontpop=0;
534: }
535: if ($#$pars > -1) {
536: pop @$pars;
537: pop @Apache::lonxml::pwd;
538: }
539: }
540:
541: # if ($target eq 'meta') {
542: # $finaloutput.=&endredirection;
543: # }
544:
545: if ( $start && $target eq 'grade') { &endredirection(); }
546: if ( $Apache::lonxml::redirection > $startredirection) {
547: while ($Apache::lonxml::redirection > $startredirection) {
548: $finaloutput .= &endredirection();
549: }
550: }
551: if (($ENV{'QUERY_STRING'}) && ($target eq 'web')) {
552: $finaloutput=&afterburn($finaloutput);
553: }
554: return $finaloutput;
555: }
556:
557: ##
558: ## Looks to see if there is a subroutine defined for this tag. If so, call it,
559: ## otherwise do not call it as we do not know what it is.
560: ##
561: sub callsub {
562: my ($sub,$target,$token,$tagstack,$parstack,$parser,$safeeval,$style)=@_;
563: my $currentstring='';
564: my $nodefault;
565: {
566: my $sub1;
567: no strict 'refs';
568: my $tag=$token->[1];
569: # get utterly rid of extended html tags
570: if ($tag=~/^x\-/i) { return ''; }
571: my $space=$Apache::lonxml::alltags{$tag}[-1];
572: if (!$space) {
573: $tag=~tr/A-Z/a-z/;
574: $sub=~tr/A-Z/a-z/;
575: $space=$Apache::lonxml::alltags{$tag}[-1]
576: }
577:
578: my $deleted=0;
579: if (($token->[0] eq 'S') && ($target eq 'modified')) {
580: $deleted=&Apache::edit::handle_delete($space,$target,$token,$tagstack,
581: $parstack,$parser,$safeeval,
582: $style);
583: }
584: if (!$deleted) {
585: if ($space) {
586: #&Apache::lonxml::debug("Calling sub $sub in $space $metamode");
587: $sub1="$space\:\:$sub";
588: ($currentstring,$nodefault) = &$sub1($target,$token,$tagstack,
589: $parstack,$parser,$safeeval,
590: $style);
591: } else {
592: if ($target eq 'tex') {
593: # throw away tag name
594: return '';
595: }
596: #&Apache::lonxml::debug("NOT Calling sub $sub in $space $metamode");
597: if ($metamode <1) {
598: if (defined($token->[4]) && ($metamode < 1)) {
599: $currentstring = $token->[4];
600: } else {
601: $currentstring = $token->[2];
602: }
603: }
604: }
605: # &Apache::lonxml::debug("nodefalt:$nodefault:");
606: if ($currentstring eq '' && $nodefault eq '') {
607: if ($target eq 'edit') {
608: #&Apache::lonxml::debug("doing default edit for $token->[1]");
609: if ($token->[0] eq 'S') {
610: $currentstring = &Apache::edit::tag_start($target,$token);
611: } elsif ($token->[0] eq 'E') {
612: $currentstring = &Apache::edit::tag_end($target,$token);
613: }
614: }
615: }
616: if ($target eq 'modified' && $nodefault eq '') {
617: if ($currentstring eq '') {
618: if ($token->[0] eq 'S') {
619: $currentstring = $token->[4];
620: } elsif ($token->[0] eq 'E') {
621: $currentstring = $token->[2];
622: } else {
623: $currentstring = $token->[2];
624: }
625: }
626: if ($token->[0] eq 'S') {
627: $currentstring.=&Apache::edit::handle_insert();
628: } elsif ($token->[0] eq 'E') {
629: $currentstring.=&Apache::edit::handle_insertafter($token->[1]);
630: }
631: }
632: }
633: use strict 'refs';
634: }
635: return $currentstring;
636: }
637:
638: {
639: my %state;
640:
641: sub init_state {
642: undef(%state);
643: }
644:
645: sub set_state {
646: my ($key,$value) = @_;
647: $state{$key} = $value;
648: return $value;
649: }
650: sub get_state {
651: my ($key) = @_;
652: return $state{$key};
653: }
654: }
655:
656: sub setup_globals {
657: my ($request,$target)=@_;
658: $Apache::lonxml::request=$request;
659: $errorcount=0;
660: $warningcount=0;
661: $Apache::lonxml::default_homework_loaded=0;
662: $Apache::lonxml::usestyle=1;
663: &init_counter();
664: &clear_bubble_lines_for_part();
665: &init_state();
666: &set_state('target',$target);
667: @Apache::lonxml::pwd=();
668: @Apache::lonxml::extlinks=();
669: @script_var_displays=();
670: @Apache::lonxml::ssi_info=();
671: $Apache::lonxml::post_evaluate=1;
672: $Apache::lonxml::warnings_error_header='';
673: $Apache::lonxml::substitute_LaTeX_symbols = 1;
674: if ($target eq 'meta') {
675: $Apache::lonxml::redirection = 0;
676: $Apache::lonxml::metamode = 1;
677: $Apache::lonxml::evaluate = 1;
678: $Apache::lonxml::import = 0;
679: } elsif ($target eq 'answer') {
680: $Apache::lonxml::redirection = 0;
681: $Apache::lonxml::metamode = 1;
682: $Apache::lonxml::evaluate = 1;
683: $Apache::lonxml::import = 1;
684: } elsif ($target eq 'grade') {
685: &startredirection(); #ended in inner_xmlparse on exit
686: $Apache::lonxml::metamode = 0;
687: $Apache::lonxml::evaluate = 1;
688: $Apache::lonxml::import = 1;
689: } elsif ($target eq 'modified') {
690: $Apache::lonxml::redirection = 0;
691: $Apache::lonxml::metamode = 0;
692: $Apache::lonxml::evaluate = 0;
693: $Apache::lonxml::import = 0;
694: } elsif ($target eq 'edit') {
695: $Apache::lonxml::redirection = 0;
696: $Apache::lonxml::metamode = 0;
697: $Apache::lonxml::evaluate = 0;
698: $Apache::lonxml::import = 0;
699: } elsif ($target eq 'analyze') {
700: $Apache::lonxml::redirection = 0;
701: $Apache::lonxml::metamode = 0;
702: $Apache::lonxml::evaluate = 1;
703: $Apache::lonxml::import = 1;
704: } else {
705: $Apache::lonxml::redirection = 0;
706: $Apache::lonxml::metamode = 0;
707: $Apache::lonxml::evaluate = 1;
708: $Apache::lonxml::import = 1;
709: }
710: }
711:
712: sub init_safespace {
713: my ($target,$safeeval,$safehole,$safeinit) = @_;
714: $safeeval->deny_only(':dangerous');
715: $safeeval->reval('use Math::Complex;');
716: $safeeval->permit_only(":default");
717: $safeeval->permit("entereval");
718: $safeeval->permit(":base_math");
719: $safeeval->permit("sort");
720: $safeeval->permit("time");
721: $safeeval->deny("rand");
722: $safeeval->deny("srand");
723: $safeeval->deny(":base_io");
724: $safehole->wrap(\&Apache::scripttag::xmlparse,$safeeval,'&xmlparse');
725: $safehole->wrap(\&Apache::outputtags::multipart,$safeeval,'&multipart');
726: $safehole->wrap(\&Apache::lonnet::EXT,$safeeval,'&EXT');
727: $safehole->wrap(\&Apache::chemresponse::chem_standard_order,$safeeval,
728: '&chem_standard_order');
729: $safehole->wrap(\&Apache::response::check_status,$safeeval,'&check_status');
730: $safehole->wrap(\&Apache::response::implicit_multiplication,$safeeval,'&implicit_multiplication');
731:
732: $safehole->wrap(\&Apache::lonmaxima::maxima_eval,$safeeval,'&maxima_eval');
733: $safehole->wrap(\&Apache::lonmaxima::maxima_check,$safeeval,'&maxima_check');
734: $safehole->wrap(\&Apache::lonmaxima::maxima_cas_formula_fix,$safeeval,
735: '&maxima_cas_formula_fix');
736:
737: $safehole->wrap(\&Apache::caparesponse::capa_formula_fix,$safeeval,
738: '&capa_formula_fix');
739:
740: $safehole->wrap(\&Math::Cephes::asin,$safeeval,'&asin');
741: $safehole->wrap(\&Math::Cephes::acos,$safeeval,'&acos');
742: $safehole->wrap(\&Math::Cephes::atan,$safeeval,'&atan');
743: $safehole->wrap(\&Math::Cephes::sinh,$safeeval,'&sinh');
744: $safehole->wrap(\&Math::Cephes::cosh,$safeeval,'&cosh');
745: $safehole->wrap(\&Math::Cephes::tanh,$safeeval,'&tanh');
746: $safehole->wrap(\&Math::Cephes::asinh,$safeeval,'&asinh');
747: $safehole->wrap(\&Math::Cephes::acosh,$safeeval,'&acosh');
748: $safehole->wrap(\&Math::Cephes::atanh,$safeeval,'&atanh');
749: $safehole->wrap(\&Math::Cephes::erf,$safeeval,'&erf');
750: $safehole->wrap(\&Math::Cephes::erfc,$safeeval,'&erfc');
751: $safehole->wrap(\&Math::Cephes::j0,$safeeval,'&j0');
752: $safehole->wrap(\&Math::Cephes::j1,$safeeval,'&j1');
753: $safehole->wrap(\&Math::Cephes::jn,$safeeval,'&jn');
754: $safehole->wrap(\&Math::Cephes::jv,$safeeval,'&jv');
755: $safehole->wrap(\&Math::Cephes::y0,$safeeval,'&y0');
756: $safehole->wrap(\&Math::Cephes::y1,$safeeval,'&y1');
757: $safehole->wrap(\&Math::Cephes::yn,$safeeval,'&yn');
758: $safehole->wrap(\&Math::Cephes::yv,$safeeval,'&yv');
759:
760: $safehole->wrap(\&Math::Cephes::bdtr ,$safeeval,'&bdtr' );
761: $safehole->wrap(\&Math::Cephes::bdtrc ,$safeeval,'&bdtrc' );
762: $safehole->wrap(\&Math::Cephes::bdtri ,$safeeval,'&bdtri' );
763: $safehole->wrap(\&Math::Cephes::btdtr ,$safeeval,'&btdtr' );
764: $safehole->wrap(\&Math::Cephes::chdtr ,$safeeval,'&chdtr' );
765: $safehole->wrap(\&Math::Cephes::chdtrc,$safeeval,'&chdtrc');
766: $safehole->wrap(\&Math::Cephes::chdtri,$safeeval,'&chdtri');
767: $safehole->wrap(\&Math::Cephes::fdtr ,$safeeval,'&fdtr' );
768: $safehole->wrap(\&Math::Cephes::fdtrc ,$safeeval,'&fdtrc' );
769: $safehole->wrap(\&Math::Cephes::fdtri ,$safeeval,'&fdtri' );
770: $safehole->wrap(\&Math::Cephes::gdtr ,$safeeval,'&gdtr' );
771: $safehole->wrap(\&Math::Cephes::gdtrc ,$safeeval,'&gdtrc' );
772: $safehole->wrap(\&Math::Cephes::nbdtr ,$safeeval,'&nbdtr' );
773: $safehole->wrap(\&Math::Cephes::nbdtrc,$safeeval,'&nbdtrc');
774: $safehole->wrap(\&Math::Cephes::nbdtri,$safeeval,'&nbdtri');
775: $safehole->wrap(\&Math::Cephes::ndtr ,$safeeval,'&ndtr' );
776: $safehole->wrap(\&Math::Cephes::ndtri ,$safeeval,'&ndtri' );
777: $safehole->wrap(\&Math::Cephes::pdtr ,$safeeval,'&pdtr' );
778: $safehole->wrap(\&Math::Cephes::pdtrc ,$safeeval,'&pdtrc' );
779: $safehole->wrap(\&Math::Cephes::pdtri ,$safeeval,'&pdtri' );
780: $safehole->wrap(\&Math::Cephes::stdtr ,$safeeval,'&stdtr' );
781: $safehole->wrap(\&Math::Cephes::stdtri,$safeeval,'&stdtri');
782:
783: $safehole->wrap(\&Math::Cephes::Matrix::mat,$safeeval,'&mat');
784: $safehole->wrap(\&Math::Cephes::Matrix::new,$safeeval,
785: '&Math::Cephes::Matrix::new');
786: $safehole->wrap(\&Math::Cephes::Matrix::coef,$safeeval,
787: '&Math::Cephes::Matrix::coef');
788: $safehole->wrap(\&Math::Cephes::Matrix::clr,$safeeval,
789: '&Math::Cephes::Matrix::clr');
790: $safehole->wrap(\&Math::Cephes::Matrix::add,$safeeval,
791: '&Math::Cephes::Matrix::add');
792: $safehole->wrap(\&Math::Cephes::Matrix::sub,$safeeval,
793: '&Math::Cephes::Matrix::sub');
794: $safehole->wrap(\&Math::Cephes::Matrix::mul,$safeeval,
795: '&Math::Cephes::Matrix::mul');
796: $safehole->wrap(\&Math::Cephes::Matrix::div,$safeeval,
797: '&Math::Cephes::Matrix::div');
798: $safehole->wrap(\&Math::Cephes::Matrix::inv,$safeeval,
799: '&Math::Cephes::Matrix::inv');
800: $safehole->wrap(\&Math::Cephes::Matrix::transp,$safeeval,
801: '&Math::Cephes::Matrix::transp');
802: $safehole->wrap(\&Math::Cephes::Matrix::simq,$safeeval,
803: '&Math::Cephes::Matrix::simq');
804: $safehole->wrap(\&Math::Cephes::Matrix::mat_to_vec,$safeeval,
805: '&Math::Cephes::Matrix::mat_to_vec');
806: $safehole->wrap(\&Math::Cephes::Matrix::vec_to_mat,$safeeval,
807: '&Math::Cephes::Matrix::vec_to_mat');
808: $safehole->wrap(\&Math::Cephes::Matrix::check,$safeeval,
809: '&Math::Cephes::Matrix::check');
810: $safehole->wrap(\&Math::Cephes::Matrix::check,$safeeval,
811: '&Math::Cephes::Matrix::check');
812:
813: # $safehole->wrap(\&Math::Cephes::new_fract,$safeeval,'&new_fract');
814: # $safehole->wrap(\&Math::Cephes::radd,$safeeval,'&radd');
815: # $safehole->wrap(\&Math::Cephes::rsub,$safeeval,'&rsub');
816: # $safehole->wrap(\&Math::Cephes::rmul,$safeeval,'&rmul');
817: # $safehole->wrap(\&Math::Cephes::rdiv,$safeeval,'&rdiv');
818: # $safehole->wrap(\&Math::Cephes::euclid,$safeeval,'&euclid');
819:
820: $safehole->wrap(\&Math::Random::random_beta,$safeeval,'&math_random_beta');
821: $safehole->wrap(\&Math::Random::random_chi_square,$safeeval,'&math_random_chi_square');
822: $safehole->wrap(\&Math::Random::random_exponential,$safeeval,'&math_random_exponential');
823: $safehole->wrap(\&Math::Random::random_f,$safeeval,'&math_random_f');
824: $safehole->wrap(\&Math::Random::random_gamma,$safeeval,'&math_random_gamma');
825: $safehole->wrap(\&Math::Random::random_multivariate_normal,$safeeval,'&math_random_multivariate_normal');
826: $safehole->wrap(\&Math::Random::random_multinomial,$safeeval,'&math_random_multinomial');
827: $safehole->wrap(\&Math::Random::random_noncentral_chi_square,$safeeval,'&math_random_noncentral_chi_square');
828: $safehole->wrap(\&Math::Random::random_noncentral_f,$safeeval,'&math_random_noncentral_f');
829: $safehole->wrap(\&Math::Random::random_normal,$safeeval,'&math_random_normal');
830: $safehole->wrap(\&Math::Random::random_permutation,$safeeval,'&math_random_permutation');
831: $safehole->wrap(\&Math::Random::random_permuted_index,$safeeval,'&math_random_permuted_index');
832: $safehole->wrap(\&Math::Random::random_uniform,$safeeval,'&math_random_uniform');
833: $safehole->wrap(\&Math::Random::random_poisson,$safeeval,'&math_random_poisson');
834: $safehole->wrap(\&Math::Random::random_uniform_integer,$safeeval,'&math_random_uniform_integer');
835: $safehole->wrap(\&Math::Random::random_negative_binomial,$safeeval,'&math_random_negative_binomial');
836: $safehole->wrap(\&Math::Random::random_binomial,$safeeval,'&math_random_binomial');
837: $safehole->wrap(\&Math::Random::random_seed_from_phrase,$safeeval,'&random_seed_from_phrase');
838: $safehole->wrap(\&Math::Random::random_set_seed_from_phrase,$safeeval,'&random_set_seed_from_phrase');
839: $safehole->wrap(\&Math::Random::random_get_seed,$safeeval,'&random_get_seed');
840: $safehole->wrap(\&Math::Random::random_set_seed,$safeeval,'&random_set_seed');
841: $safehole->wrap(\&Apache::loncommon::languages,$safeeval,'&languages');
842: $safehole->wrap(\&Apache::lonxml::error,$safeeval,'&LONCAPA_INTERNAL_ERROR');
843: $safehole->wrap(\&Apache::lonxml::debug,$safeeval,'&LONCAPA_INTERNAL_DEBUG');
844: $safehole->wrap(\&Apache::lonnet::logthis,$safeeval,'&LONCAPA_INTERNAL_LOGTHIS');
845: $safehole->wrap(\&Apache::inputtags::finalizeawards,$safeeval,'&LONCAPA_INTERNAL_FINALIZEAWARDS');
846: $safehole->wrap(\&Apache::caparesponse::get_sigrange,$safeeval,'&LONCAPA_INTERNAL_get_sigrange');
847: # use Data::Dumper;
848: # $safehole->wrap(\&Data::Dumper::Dumper,$safeeval,'&LONCAPA_INTERNAL_Dumper');
849: #need to inspect this class of ops
850: # $safeeval->deny(":base_orig");
851: $safeeval->permit("require");
852: $safeinit .= ';$external::target="'.$target.'";';
853: &Apache::run::run($safeinit,$safeeval);
854: &initialize_rndseed($safeeval);
855: }
856:
857: sub clean_safespace {
858: my ($safeeval) = @_;
859: delete_package_recurse($safeeval->{Root});
860: }
861:
862: sub delete_package_recurse {
863: my ($package) = @_;
864: my @subp;
865: {
866: no strict 'refs';
867: while (my ($key,$val) = each(%{*{"$package\::"}})) {
868: if (!defined($val)) { next; }
869: local (*ENTRY) = $val;
870: if (defined *ENTRY{HASH} && $key =~ /::$/ &&
871: $key ne "main::" && $key ne "<none>::")
872: {
873: my ($p) = $package ne "main" ? "$package\::" : "";
874: ($p .= $key) =~ s/::$//;
875: push(@subp,$p);
876: }
877: }
878: }
879: foreach my $p (@subp) {
880: delete_package_recurse($p);
881: }
882: Symbol::delete_package($package);
883: }
884:
885: sub initialize_rndseed {
886: my ($safeeval)=@_;
887: my $rndseed;
888: my ($symb,$courseid,$domain,$name) = &Apache::lonnet::whichuser();
889: $rndseed=&Apache::lonnet::rndseed($symb,$courseid,$domain,$name);
890: my $safeinit = '$external::randomseed="'.$rndseed.'";';
891: &Apache::lonxml::debug("Setting rndseed to $rndseed");
892: &Apache::run::run($safeinit,$safeeval);
893: }
894:
895: sub default_homework_load {
896: my ($safeeval)=@_;
897: &Apache::lonxml::debug('Loading default_homework');
898: my $default=&Apache::lonnet::getfile('/home/httpd/html/res/adm/includes/default_homework.lcpm');
899: if ($default eq -1) {
900: &Apache::lonxml::error("<b>Unable to find <i>default_homework.lcpm</i></b>");
901: } else {
902: &Apache::run::run($default,$safeeval);
903: $Apache::lonxml::default_homework_loaded=1;
904: }
905: }
906:
907: {
908: my $alarm_depth;
909: sub init_alarm {
910: alarm(0);
911: $alarm_depth=0;
912: }
913:
914: sub start_alarm {
915: if ($alarm_depth<1) {
916: my $old=alarm($Apache::lonnet::perlvar{'lonScriptTimeout'});
917: if ($old) {
918: &Apache::lonxml::error("Cancelled an alarm of $old, this shouldn't occur.");
919: }
920: }
921: $alarm_depth++;
922: }
923:
924: sub end_alarm {
925: $alarm_depth--;
926: if ($alarm_depth<1) { alarm(0); }
927: }
928: }
929: my $metamode_was;
930: sub startredirection {
931: if (!$Apache::lonxml::redirection) {
932: $metamode_was=$Apache::lonxml::metamode;
933: }
934: $Apache::lonxml::metamode=0;
935: $Apache::lonxml::redirection++;
936: push (@Apache::lonxml::outputstack, '');
937: }
938:
939: sub endredirection {
940: if (!$Apache::lonxml::redirection) {
941: &Apache::lonxml::error("Endredirection was called before a startredirection, perhaps you have unbalanced tags. Some debugging information:".join ":",caller);
942: return '';
943: }
944: $Apache::lonxml::redirection--;
945: if (!$Apache::lonxml::redirection) {
946: $Apache::lonxml::metamode=$metamode_was;
947: }
948: pop @Apache::lonxml::outputstack;
949: }
950: sub in_redirection {
951: return ($Apache::lonxml::redirection > 0)
952: }
953:
954: sub end_tag {
955: my ($tagstack,$parstack,$token)=@_;
956: pop(@$tagstack);
957: pop(@$parstack);
958: &decreasedepth($token);
959: }
960:
961: sub initdepth {
962: @Apache::lonxml::depthcounter=();
963: undef($Apache::lonxml::last_depth_count);
964: }
965:
966:
967: my @timers;
968: my $lasttime;
969: # @Apache::lonxml::depthcounter -> count of tags that exist so
970: # far at each level
971: # $Apache::lonxml::last_depth_count -> when ascending, need to
972: # remember the count for the level below the current level (for
973: # example going from 1_2 -> 1 -> 1_3 need to remember the 2 )
974:
975: sub increasedepth {
976: my ($token) = @_;
977: push(@Apache::lonxml::depthcounter,$Apache::lonxml::last_depth_count+1);
978: undef($Apache::lonxml::last_depth_count);
979: my $time;
980: if ($Apache::lonxml::debug eq "1") {
981: push(@timers,[&gettimeofday()]);
982: $time=&tv_interval($lasttime);
983: $lasttime=[&gettimeofday()];
984: }
985: my $spacing=' 'x($#Apache::lonxml::depthcounter);
986: $Apache::lonxml::curdepth=join('_',@Apache::lonxml::depthcounter);
987: # &Apache::lonxml::debug("s$spacing$Apache::lonxml::depth : $Apache::lonxml::olddepth : $Apache::lonxml::curdepth : $token->[1] : $time");
988: #print "<br />s $Apache::lonxml::depth : $Apache::lonxml::olddepth : $curdepth : $token->[1]\n";
989: }
990:
991: sub decreasedepth {
992: my ($token) = @_;
993: if ( $#Apache::lonxml::depthcounter == -1) {
994: &Apache::lonxml::warning(&mt("Missing tags, unable to properly run file."));
995: }
996: $Apache::lonxml::last_depth_count = pop(@Apache::lonxml::depthcounter);
997:
998: my ($timer,$time);
999: if ($Apache::lonxml::debug eq "1") {
1000: $timer=pop(@timers);
1001: $time=&tv_interval($lasttime);
1002: $lasttime=[&gettimeofday()];
1003: }
1004: my $spacing=' 'x($#Apache::lonxml::depthcounter);
1005: $Apache::lonxml::curdepth = join('_',@Apache::lonxml::depthcounter);
1006: # &Apache::lonxml::debug("e$spacing$Apache::lonxml::depth : $Apache::lonxml::olddepth : $Apache::lonxml::curdepth : $token->[1] : $time : ".&tv_interval($timer));
1007: #print "<br />e $Apache::lonxml::depth : $Apache::lonxml::olddepth : $token->[1] : $curdepth\n";
1008: }
1009:
1010: sub get_id {
1011: my ($parstack,$safeeval)=@_;
1012: my $id= &Apache::lonxml::get_param('id',$parstack,$safeeval);
1013: if ($env{'request.state'} eq 'construct' && $id =~ /([._]|[^\w\d\s[:punct:]])/) {
1014: &error(&mt("ID "[_1]" contains invalid characters, IDs are only allowed to contain letters, numbers, spaces and -",'<tt>'.$id.'</tt>'));
1015: }
1016: if ($id =~ /^\s*$/) { $id = $Apache::lonxml::curdepth; }
1017: return $id;
1018: }
1019:
1020: sub get_all_text_unbalanced {
1021: #there is a copy of this in lonpublisher.pm
1022: my($tag,$pars)= @_;
1023: my $token;
1024: my $result='';
1025: $tag='<'.$tag.'>';
1026: while ($token = $$pars[-1]->get_token) {
1027: if (($token->[0] eq 'T')||($token->[0] eq 'C')||($token->[0] eq 'D')) {
1028: if ($token->[0] eq 'T' && $token->[2]) {
1029: $result.='<![CDATA['.$token->[1].']]>';
1030: } else {
1031: $result.=$token->[1];
1032: }
1033: } elsif ($token->[0] eq 'PI') {
1034: $result.=$token->[2];
1035: } elsif ($token->[0] eq 'S') {
1036: $result.=$token->[4];
1037: } elsif ($token->[0] eq 'E') {
1038: $result.=$token->[2];
1039: }
1040: if ($result =~ /\Q$tag\E/is) {
1041: ($result,my $redo)=$result =~ /(.*)\Q$tag\E(.*)/is;
1042: #&Apache::lonxml::debug('Got a winner with leftovers ::'.$2);
1043: #&Apache::lonxml::debug('Result is :'.$1);
1044: $redo=$tag.$redo;
1045: &Apache::lonxml::newparser($pars,\$redo);
1046: last;
1047: }
1048: }
1049: return $result
1050:
1051: }
1052:
1053: #########################################################################
1054: # #
1055: # bubble line counter management #
1056: # #
1057: #########################################################################
1058:
1059: =pod
1060:
1061: For bubble grading mode and exam bubble printing mode, the tracking of
1062: the current 'bubble line number' is stored in the %env element
1063: 'form.counter', and is modifed and handled by the following routines.
1064:
1065: The value of it is stored in $Apache:lonxml::counter when live and
1066: stored back to env after done.
1067:
1068: =item &increment_counter($increment);
1069:
1070: Increments the internal counter environment variable a specified amount
1071:
1072: Optional Arguments:
1073: $increment - amount to increment by (defaults to 1)
1074: Also 1 if the value is negative or zero.
1075: $part_response - A concatenation of the part and response id
1076: identifying exactly what is being 'answered'.
1077:
1078:
1079: =cut
1080:
1081: sub increment_counter {
1082: my ($increment, $part_response) = @_;
1083: if ($env{'form.grade_target'} eq 'analyze') { return; }
1084: if (!defined($increment) || $increment le 0) {
1085: $increment = 1;
1086: }
1087: $Apache::lonxml::counter += $increment;
1088:
1089: # If the caller supplied the response_id parameter,
1090: # Maintain its counter.. creating if necessary.
1091:
1092: if (defined($part_response)) {
1093: if (!defined($Apache::lonxml::counters_per_part{$part_response})) {
1094: $Apache::lonxml::counters_per_part{$part_response} = 0;
1095: }
1096: $Apache::lonxml::counters_per_part{$part_response} += $increment;
1097: my $new_value = $Apache::lonxml::counters_per_part{$part_response};
1098: }
1099:
1100: $Apache::lonxml::counter_changed=1;
1101: }
1102:
1103: =pod
1104:
1105: =item &init_counter($increment);
1106:
1107: Initialize the internal counter environment variable
1108:
1109: =cut
1110:
1111: sub init_counter {
1112: if ($env{'request.state'} eq 'construct') {
1113: $Apache::lonxml::counter=1;
1114: $Apache::lonxml::counter_changed=1;
1115: } elsif (defined($env{'form.counter'})) {
1116: $Apache::lonxml::counter=$env{'form.counter'};
1117: $Apache::lonxml::counter_changed=0;
1118: } else {
1119: $Apache::lonxml::counter=1;
1120: $Apache::lonxml::counter_changed=1;
1121: }
1122: }
1123:
1124: sub store_counter {
1125: &Apache::lonnet::appenv({'form.counter' => $Apache::lonxml::counter});
1126: $Apache::lonxml::counter_changed=0;
1127: return '';
1128: }
1129:
1130: {
1131: my $state;
1132: sub clear_problem_counter {
1133: undef($state);
1134: &Apache::lonnet::delenv('form.counter');
1135: &Apache::lonxml::init_counter();
1136: &Apache::lonxml::store_counter();
1137: }
1138:
1139: sub remember_problem_counter {
1140: &Apache::lonnet::transfer_profile_to_env(undef,undef,1);
1141: $state = $env{'form.counter'};
1142: }
1143:
1144: sub restore_problem_counter {
1145: if (defined($state)) {
1146: &Apache::lonnet::appenv({'form.counter' => $state});
1147: }
1148: }
1149: sub get_problem_counter {
1150: if ($Apache::lonxml::counter_changed) { &store_counter() }
1151: &Apache::lonnet::transfer_profile_to_env(undef,undef,1);
1152: return $env{'form.counter'};
1153: }
1154: }
1155:
1156: =pod
1157:
1158: =item bubble_lines_for_part(part_response)
1159:
1160: Returns the number of lines required to get a response for
1161: $part_response (this is just $Apache::lonxml::counters_per_part{$part_response}
1162:
1163: =cut
1164:
1165: sub bubble_lines_for_part {
1166: my ($part_response) = @_;
1167:
1168: if (!defined($Apache::lonxml::counters_per_part{$part_response})) {
1169: return 0;
1170: } else {
1171: return $Apache::lonxml::counters_per_part{$part_response};
1172: }
1173: }
1174:
1175: =pod
1176:
1177: =item clear_bubble_lines_for_part
1178:
1179: Clears the hash of bubble lines per part. If a caller
1180: needs to analyze several resources this should be called between
1181: resources to reset the hash for each problem being analyzed.
1182:
1183: =cut
1184:
1185: sub clear_bubble_lines_for_part {
1186: undef(%Apache::lonxml::counters_per_part);
1187: }
1188:
1189: =pod
1190:
1191: =item set_bubble_lines(part_response, value)
1192:
1193: If there is a problem part, that for whatever reason
1194: requires bubble lines that are not
1195: the same as the counter increment, it can call this sub during
1196: analysis to set its hash value explicitly.
1197:
1198: =cut
1199:
1200: sub set_bubble_lines {
1201: my ($part_response, $value) = @_;
1202:
1203: $Apache::lonxml::counters_per_part{$part_response} = $value;
1204: }
1205:
1206: =pod
1207:
1208: =item get_bubble_line_hash
1209:
1210: Returns the current bubble line hash. This is assumed to
1211: be small so we return a copy
1212:
1213:
1214: =cut
1215:
1216: sub get_bubble_line_hash {
1217: return %Apache::lonxml::counters_per_part;
1218: }
1219:
1220:
1221: #--------------------------------------------------
1222:
1223: sub get_all_text {
1224: my($tag,$pars,$style)= @_;
1225: my $gotfullstack=1;
1226: if (ref($pars) ne 'ARRAY') {
1227: $gotfullstack=0;
1228: $pars=[$pars];
1229: }
1230: if (ref($style) ne 'HASH') {
1231: $style={};
1232: }
1233: my $depth=0;
1234: my $token;
1235: my $result='';
1236: if ( $tag =~ m:^/: ) {
1237: my $tag=substr($tag,1);
1238: #&Apache::lonxml::debug("have:$tag:");
1239: my $top_empty=0;
1240: while (($depth >=0) && ($#$pars > -1) && (!$top_empty)) {
1241: while (($depth >=0) && ($token = $$pars[-1]->get_token)) {
1242: #&Apache::lonxml::debug("e token:$token->[0]:$depth:$token->[1]:".$#$pars.":".$#Apache::lonxml::pwd);
1243: if (($token->[0] eq 'T')||($token->[0] eq 'C')||($token->[0] eq 'D')) {
1244: if ($token->[2]) {
1245: $result.='<![CDATA['.$token->[1].']]>';
1246: } else {
1247: $result.=$token->[1];
1248: }
1249: } elsif ($token->[0] eq 'PI') {
1250: $result.=$token->[2];
1251: } elsif ($token->[0] eq 'S') {
1252: if ($token->[1] =~ /^\Q$tag\E$/i) { $depth++; }
1253: if ($token->[1] =~ /^LONCAPA_INTERNAL_TURN_STYLE_ON$/) { $Apache::lonxml::usestyle=1; }
1254: if ($token->[1] =~ /^LONCAPA_INTERNAL_TURN_STYLE_OFF$/) { $Apache::lonxml::usestyle=0; }
1255: $result.=$token->[4];
1256: } elsif ($token->[0] eq 'E') {
1257: if ( $token->[1] =~ /^\Q$tag\E$/i) { $depth--; }
1258: #skip sending back the last end tag
1259: if ($depth == 0 && exists($$style{'/'.$token->[1]}) && $Apache::lonxml::usestyle) {
1260: my $string=
1261: '<LONCAPA_INTERNAL_TURN_STYLE_OFF end="yes" />'.
1262: $$style{'/'.$token->[1]}.
1263: $token->[2].
1264: '<LONCAPA_INTERNAL_TURN_STYLE_ON />';
1265: &Apache::lonxml::newparser($pars,\$string);
1266: #&Apache::lonxml::debug("reParsing $string");
1267: next;
1268: }
1269: if ($depth > -1) {
1270: $result.=$token->[2];
1271: } else {
1272: $$pars[-1]->unget_token($token);
1273: }
1274: }
1275: }
1276: if (($depth >=0) && ($#$pars == 0) ) { $top_empty=1; }
1277: if (($depth >=0) && ($#$pars > 0) ) {
1278: pop(@$pars);
1279: pop(@Apache::lonxml::pwd);
1280: }
1281: }
1282: if ($top_empty && $depth >= 0) {
1283: #never found the end tag ran out of text, throw error send back blank
1284: &error('Never found end tag for <'.$tag.
1285: '> current string <pre>'.
1286: &HTML::Entities::encode($result,'<>&"').
1287: '</pre>');
1288: if ($gotfullstack) {
1289: my $newstring='</'.$tag.'>'.$result;
1290: &Apache::lonxml::newparser($pars,\$newstring);
1291: }
1292: $result='';
1293: }
1294: } else {
1295: while ($#$pars > -1) {
1296: while ($token = $$pars[-1]->get_token) {
1297: #&Apache::lonxml::debug("s token:$token->[0]:$depth:$token->[1]");
1298: if (($token->[0] eq 'T')||($token->[0] eq 'C')||
1299: ($token->[0] eq 'D')) {
1300: if ($token->[2]) {
1301: $result.='<![CDATA['.$token->[1].']]>';
1302: } else {
1303: $result.=$token->[1];
1304: }
1305: } elsif ($token->[0] eq 'PI') {
1306: $result.=$token->[2];
1307: } elsif ($token->[0] eq 'S') {
1308: if ( $token->[1] =~ /^\Q$tag\E$/i) {
1309: $$pars[-1]->unget_token($token); last;
1310: } else {
1311: $result.=$token->[4];
1312: }
1313: if ($token->[1] =~ /^LONCAPA_INTERNAL_TURN_STYLE_ON$/) { $Apache::lonxml::usestyle=1; }
1314: if ($token->[1] =~ /^LONCAPA_INTERNAL_TURN_STYLE_OFF$/) { $Apache::lonxml::usestyle=0; }
1315: } elsif ($token->[0] eq 'E') {
1316: $result.=$token->[2];
1317: }
1318: }
1319: if (($#$pars > 0) ) {
1320: pop(@$pars);
1321: pop(@Apache::lonxml::pwd);
1322: } else { last; }
1323: }
1324: }
1325: #&Apache::lonxml::debug("Exit:$result:");
1326: return $result
1327: }
1328:
1329: sub newparser {
1330: my ($parser,$contentref,$dir) = @_;
1331: push (@$parser,HTML::LCParser->new($contentref));
1332: $$parser[-1]->xml_mode(1);
1333: $$parser[-1]->marked_sections(1);
1334: if ( $dir eq '' ) {
1335: push (@Apache::lonxml::pwd, $Apache::lonxml::pwd[$#Apache::lonxml::pwd]);
1336: } else {
1337: push (@Apache::lonxml::pwd, $dir);
1338: }
1339: }
1340:
1341: sub parstring {
1342: my ($token) = @_;
1343: my (@vars,@values);
1344: foreach my $attr (@{$token->[3]}) {
1345: if ($attr!~/\W/) {
1346: my $val=$token->[2]->{$attr};
1347: $val =~ s/([\%\@\\\"\'])/\\$1/g;
1348: $val =~ s/(\$[^\{a-zA-Z_])/\\$1/g;
1349: $val =~ s/(\$)$/\\$1/;
1350: #if ($val =~ m/^[\%\@]/) { $val="\\".$val; }
1351: push(@vars,"\$$attr");
1352: push(@values,"\"$val\"");
1353: }
1354: }
1355: my $var_init =
1356: (@vars) ? 'my ('.join(',',@vars).') = ('.join(',',@values).');'
1357: : '';
1358: return $var_init;
1359: }
1360:
1361: sub extlink {
1362: my ($res,$exact)=@_;
1363: if (!$exact) {
1364: $res=&Apache::lonnet::hreflocation($Apache::lonxml::pwd[-1],$res);
1365: }
1366: push(@Apache::lonxml::extlinks,$res)
1367: }
1368:
1369: sub writeallows {
1370: unless ($#extlinks>=0) { return; }
1371: my $thisurl = &Apache::lonnet::clutter(shift);
1372: if ($env{'httpref.'.$thisurl}) {
1373: $thisurl=$env{'httpref.'.$thisurl};
1374: }
1375: my $thisdir=$thisurl;
1376: $thisdir=~s/\/[^\/]+$//;
1377: my %httpref=();
1378: foreach (@extlinks) {
1379: $httpref{'httpref.'.
1380: &Apache::lonnet::hreflocation($thisdir,&unescape($_))}=$thisurl;
1381: }
1382: @extlinks=();
1383: &Apache::lonnet::appenv(\%httpref);
1384: }
1385:
1386: sub register_ssi {
1387: my ($url,%form)=@_;
1388: push (@Apache::lonxml::ssi_info,{'url'=>$url,'form'=>\%form});
1389: return '';
1390: }
1391:
1392: sub do_registered_ssi {
1393: foreach my $info (@Apache::lonxml::ssi_info) {
1394: my %form=%{ $info->{'form'}};
1395: my $url=$info->{'url'};
1396: &Apache::lonnet::ssi($url,%form);
1397: }
1398: }
1399:
1400: sub add_script_result {
1401: my ($display) = @_;
1402: push(@script_var_displays, $display);
1403: }
1404:
1405: #
1406: # Afterburner handles anchors, highlights and links
1407: #
1408: sub afterburn {
1409: my $result=shift;
1410: &Apache::loncommon::get_unprocessed_cgi($ENV{'QUERY_STRING'},
1411: ['highlight','anchor','link']);
1412: if ($env{'form.highlight'}) {
1413: foreach (split(/\,/,$env{'form.highlight'})) {
1414: my $anchorname=$_;
1415: my $matchthis=$anchorname;
1416: $matchthis=~s/\_+/\\s\+/g;
1417: $result=~s/(\Q$matchthis\E)/\<font color=\"red\"\>$1\<\/font\>/gs;
1418: }
1419: }
1420: if ($env{'form.link'}) {
1421: foreach (split(/\,/,$env{'form.link'})) {
1422: my ($anchorname,$linkurl)=split(/\>/,$_);
1423: my $matchthis=$anchorname;
1424: $matchthis=~s/\_+/\\s\+/g;
1425: $result=~s/(\Q$matchthis\E)/\<a href=\"$linkurl\"\>$1\<\/a\>/gs;
1426: }
1427: }
1428: if ($env{'form.anchor'}) {
1429: my $anchorname=$env{'form.anchor'};
1430: my $matchthis=$anchorname;
1431: $matchthis=~s/\_+/\\s\+/g;
1432: $result=~s/(\Q$matchthis\E)/\<a name=\"$anchorname\"\>$1\<\/a\>/s;
1433: $result.=(<<"ENDSCRIPT");
1434: <script type="text/javascript">
1435: document.location.hash='$anchorname';
1436: </script>
1437: ENDSCRIPT
1438: }
1439: return $result;
1440: }
1441:
1442: sub storefile {
1443: my ($file,$contents)=@_;
1444: &Apache::lonnet::correct_line_ends(\$contents);
1445: if (my $fh=Apache::File->new('>'.$file)) {
1446: print $fh $contents;
1447: $fh->close();
1448: return 1;
1449: } else {
1450: &warning("Unable to save file $file");
1451: return 0;
1452: }
1453: }
1454:
1455: sub createnewhtml {
1456: my $title=&mt('Title of document goes here');
1457: my $body=&mt('Body of document goes here');
1458: my $filecontents=(<<SIMPLECONTENT);
1459: <html>
1460: <head>
1461: <title>$title</title>
1462: </head>
1463: <body bgcolor="#FFFFFF">
1464: $body
1465: </body>
1466: </html>
1467: SIMPLECONTENT
1468: return $filecontents;
1469: }
1470:
1471: sub createnewsty {
1472: my $filecontents=(<<SIMPLECONTENT);
1473: <definetag name="">
1474: <render>
1475: <web></web>
1476: <tex></tex>
1477: </render>
1478: </definetag>
1479: SIMPLECONTENT
1480: return $filecontents;
1481: }
1482:
1483: sub verify_html {
1484: my ($filecontents)=@_;
1485: if ($filecontents!~/(?:\<|\<\;)(?:html|xml)[^\<]*(?:\>|\>\;)/is) {
1486: return &mt('File does not have [_1] or [_2] starting tag','<html>','<xml>');
1487: }
1488: if ($filecontents!~/(?:\<|\<\;)\/(?:html|xml)(?:\>|\>\;)/is) {
1489: return &mt('File does not have [_1] or [_2] ending tag','<html>','<xml>');
1490: }
1491: if ($filecontents!~/(?:\<|\<\;)(?:body|frameset)[^\<]*(?:\>|\>\;)/is) {
1492: return &mt('File does not have [_1] or [_2] starting tag','<body>','<frameset>');
1493: }
1494: if ($filecontents!~/(?:\<|\<\;)\/(?:body|frameset)[^\<]*(?:\>|\>\;)/is) {
1495: return &mt('File does not have [_1] or [_2] ending tag','<body>','<frameset>');
1496: }
1497: return '';
1498: }
1499:
1500: sub renderingoptions {
1501: my %langchoices=('' => '');
1502: foreach (&Apache::loncommon::languageids()) {
1503: if (&Apache::loncommon::supportedlanguagecode($_)) {
1504: $langchoices{&Apache::loncommon::supportedlanguagecode($_)}
1505: = &Apache::loncommon::plainlanguagedescription($_);
1506: }
1507: }
1508: return
1509: '<span class="LC_nobreak">'.
1510: &mt('Language: ').
1511: &Apache::loncommon::select_form($env{'form.languages'},'languages',
1512: %langchoices).'
1513: </span>
1514: <span class="LC_nobreak">'.
1515: &mt('Math Rendering: ').
1516: &Apache::loncommon::select_form($env{'form.texengine'},'texengine',
1517: ('' => '',
1518: 'tth' => 'tth',
1519: 'jsMath' => 'jsMath',
1520: 'mimetex' => 'mimetex')).'
1521: </span>';
1522: }
1523:
1524: sub inserteditinfo {
1525: my ($filecontents, $filetype, $filename)=@_;
1526: $filecontents = &HTML::Entities::encode($filecontents,'<>&"');
1527: my $xml_help = '';
1528: my $initialize='';
1529: my $textarea_id = 'filecont';
1530: my ($add_to_onload, $add_to_onresize);
1531: $initialize=&Apache::lonhtmlcommon::spellheader();
1532: if ($filetype eq 'html'
1533: && (!&Apache::lonhtmlcommon::htmlareablocked() &&
1534: &Apache::lonhtmlcommon::htmlareabrowser())) {
1535: $textarea_id .= '___Frame';
1536: my $lang = &Apache::lonhtmlcommon::htmlarea_lang();
1537: $initialize.=(<<FULLPAGE);
1538: <script type="text/javascript">
1539: lonca
1540: function initDocument() {
1541: var oFCKeditor = new FCKeditor('filecont');
1542: oFCKeditor.Config['CustomConfigurationsPath'] = '/fckeditor/loncapaconfig.js' ;
1543: oFCKeditor.Config['FullPage'] = true
1544: oFCKeditor.Config['AutoDetectLanguage'] = false;
1545: oFCKeditor.Config['DefaultLanguage'] = "$lang";
1546: oFCKeditor.ReplaceTextarea();
1547: }
1548: function check_if_dirty(editor) {
1549: if (editor.IsDirty()) {
1550: unClean();
1551: }
1552: }
1553: function FCKeditor_OnComplete(editor) {
1554: editor.Events.AttachEvent("OnSelectionChange",check_if_dirty);
1555: resize_textarea('$textarea_id','LC_aftertextarea');
1556: }
1557: </script>
1558: FULLPAGE
1559: } else {
1560: $initialize.=(<<FULLPAGE);
1561: <script type="text/javascript">
1562: function initDocument() {
1563: resize_textarea('$textarea_id','LC_aftertextarea');
1564: }
1565: </script>
1566: FULLPAGE
1567: }
1568:
1569: $add_to_onload = 'initDocument();';
1570: $add_to_onresize = "resize_textarea('$textarea_id','LC_aftertextarea');";
1571:
1572: if ($filetype eq 'html') {
1573: $xml_help=&Apache::loncommon::helpLatexCheatsheet();
1574: }
1575:
1576: my $titledisplay=&display_title();
1577: my %lt=&Apache::lonlocal::texthash('st' => 'Save and Edit',
1578: 'vi' => 'Save and View',
1579: 'dv' => 'Discard Edits and View',
1580: 'un' => 'undo',
1581: 'ed' => 'Edit');
1582: my $spelllink .=&Apache::lonhtmlcommon::spelllink('xmledit','filecont');
1583: my $textarea_events = &Apache::edit::element_change_detection();
1584: my $form_events = &Apache::edit::form_change_detection();
1585: my $htmlerror=&verify_html($filecontents);
1586: if ($htmlerror) {
1587: $htmlerror='<span class="LC_error">'.$htmlerror.'</span>';
1588: }
1589: my $editfooter=(<<ENDFOOTER);
1590: $initialize
1591: <a name="editsection" />
1592: <form $form_events method="post" name="xmledit">
1593: <div class="LC_edit_problem_editxml_header">
1594: <table class="LC_edit_problem_header_title"><tr><td>
1595: $filename
1596: </td><td align="right">
1597: $xml_help
1598: </td></tr>
1599: </table>
1600: <div class="LC_edit_problem_discards">
1601: <input type="submit" name="discardview" accesskey="d" value="$lt{'dv'}" />
1602: <input type="submit" name="Undo" accesskey="u" value="$lt{'un'}" />
1603: $spelllink $htmlerror
1604: </div>
1605: <div class="LC_edit_problem_saves">
1606: <input type="submit" name="savethisfile" accesskey="s" value="$lt{'st'}" />
1607: <input type="submit" name="viewmode" accesskey="v" value="$lt{'vi'}" />
1608: </div>
1609: </div>
1610: <textarea $textarea_events style="width:100%" cols="80" rows="44" name="filecont" id="filecont">$filecontents</textarea>
1611: <div id="LC_aftertextarea">
1612: <br />
1613: $titledisplay
1614: </div>
1615: </form>
1616: </body>
1617: ENDFOOTER
1618: return ($editfooter,$add_to_onload,$add_to_onresize);;
1619: }
1620:
1621: sub get_target {
1622: my $viewgrades=&Apache::lonnet::allowed('vgr',$env{'request.course.id'});
1623: if ( $env{'request.state'} eq 'published') {
1624: if ( defined($env{'form.grade_target'})
1625: && ($viewgrades == 'F' )) {
1626: return ($env{'form.grade_target'});
1627: } elsif (defined($env{'form.grade_target'})) {
1628: if (($env{'form.grade_target'} eq 'web') ||
1629: ($env{'form.grade_target'} eq 'tex') ) {
1630: return $env{'form.grade_target'}
1631: } else {
1632: return 'web';
1633: }
1634: } else {
1635: return 'web';
1636: }
1637: } elsif ($env{'request.state'} eq 'construct') {
1638: if ( defined($env{'form.grade_target'})) {
1639: return ($env{'form.grade_target'});
1640: } else {
1641: return 'web';
1642: }
1643: } else {
1644: return 'web';
1645: }
1646: }
1647:
1648: sub handler {
1649: my $request=shift;
1650:
1651: my $target=&get_target();
1652:
1653: $Apache::lonxml::debug=$env{'user.debug'};
1654:
1655: &Apache::loncommon::content_type($request,'text/html');
1656: &Apache::loncommon::no_cache($request);
1657: if ($env{'request.state'} eq 'published') {
1658: $request->set_last_modified(&Apache::lonnet::metadata($request->uri,
1659: 'lastrevisiondate'));
1660: }
1661: $request->send_http_header;
1662:
1663: return OK if $request->header_only;
1664:
1665:
1666: my $file=&Apache::lonnet::filelocation("",$request->uri);
1667: my $filetype;
1668: if ($file =~ /\.sty$/) {
1669: $filetype='sty';
1670: } else {
1671: $filetype='html';
1672: }
1673: #
1674: # Edit action? Save file.
1675: #
1676: if (!($env{'request.state'} eq 'published')) {
1677: if ($env{'form.savethisfile'} || $env{'form.viewmode'} || $env{'form.Undo'}) {
1678: my $html_file=&Apache::lonnet::getfile($file);
1679: my $error = &Apache::lonhomework::handle_save_or_undo($request, \$html_file, \$env{'form.filecont'});
1680: if ($env{'form.savethisfile'}) {
1681: $env{'form.editmode'}='Edit'; #force edit mode
1682: }
1683: }
1684: }
1685: my %mystyle;
1686: my $result = '';
1687: my $filecontents=&Apache::lonnet::getfile($file);
1688: if ($filecontents eq -1) {
1689: my $start_page=&Apache::loncommon::start_page('File Error');
1690: my $end_page=&Apache::loncommon::end_page();
1691: my $fnf=&mt('File not found');
1692: $result=(<<ENDNOTFOUND);
1693: $start_page
1694: <b>$fnf: $file</b>
1695: $end_page
1696: ENDNOTFOUND
1697: $filecontents='';
1698: if ($env{'request.state'} ne 'published') {
1699: if ($filetype eq 'sty') {
1700: $filecontents=&createnewsty();
1701: } else {
1702: $filecontents=&createnewhtml();
1703: }
1704: $env{'form.editmode'}='Edit'; #force edit mode
1705: }
1706: } else {
1707: unless ($env{'request.state'} eq 'published') {
1708: if ($filecontents=~/BEGIN LON-CAPA Internal/) {
1709: &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.'));
1710: }
1711: #
1712: # we are in construction space, see if edit mode forced
1713: &Apache::loncommon::get_unprocessed_cgi($ENV{'QUERY_STRING'},
1714: ['editmode']);
1715: }
1716: if (!$env{'form.editmode'} || $env{'form.viewmode'} || $env{'form.discardview'}) {
1717: &Apache::structuretags::reset_problem_globals();
1718: $result = &Apache::lonxml::xmlparse($request,$target,$filecontents,
1719: '',%mystyle);
1720: # .html files may contain <problem> or <Task> need to clean
1721: # up if it did
1722: &Apache::structuretags::reset_problem_globals();
1723: &Apache::lonhomework::finished_parsing();
1724: &Apache::loncommon::get_unprocessed_cgi($ENV{'QUERY_STRING'},
1725: ['rawmode']);
1726: if ($env{'form.rawmode'}) { $result = $filecontents; }
1727: if ($filetype eq 'sty') {
1728: my $controls =
1729: ($env{'request.state'} eq 'construct') ? &Apache::londefdef::edit_controls()
1730: : '';
1731: my %options = ('bgcolor' => '#FFFFFF');
1732: $result =
1733: &Apache::loncommon::start_page(undef,undef,\%options).
1734: $controls.
1735: $result.
1736: &Apache::loncommon::end_page();
1737: }
1738: }
1739: }
1740:
1741: #
1742: # Edit action? Insert editing commands
1743: #
1744: unless ($env{'request.state'} eq 'published') {
1745: if ($env{'form.editmode'} && (!($env{'form.viewmode'})) && (!($env{'form.discardview'})))
1746: {
1747: my $displayfile=$request->uri;
1748: $displayfile=~s/^\/[^\/]*//;
1749:
1750: my ($edit_info, $add_to_onload, $add_to_onresize)=
1751: &inserteditinfo($filecontents,$filetype,$displayfile);
1752:
1753: my %options =
1754: ('add_entries' =>
1755: {'onresize' => $add_to_onresize,
1756: 'onload' => $add_to_onload, });
1757:
1758: if ($env{'environment.remote'} ne 'off') {
1759: $options{'bgcolor'} = '#FFFFFF';
1760: $options{'only_body'} = 1;
1761: }
1762: my $js =
1763: &Apache::edit::js_change_detection().
1764: &Apache::loncommon::resize_textarea_js();
1765: my $start_page = &Apache::loncommon::start_page(undef,$js,
1766: \%options);
1767: $result=$start_page.
1768: &Apache::lonxml::message_location().
1769: $edit_info.
1770: &Apache::loncommon::end_page();
1771: }
1772: }
1773: if ($filetype eq 'html') { &writeallows($request->uri); }
1774:
1775: &Apache::lonxml::add_messages(\$result);
1776: $request->print($result);
1777:
1778: return OK;
1779: }
1780:
1781: sub display_title {
1782: my $result;
1783: if ($env{'request.state'} eq 'construct') {
1784: my $title=&Apache::lonnet::gettitle();
1785: if (!defined($title) || $title eq '') {
1786: $title = $env{'request.filename'};
1787: $title = substr($title, rindex($title, '/') + 1);
1788: }
1789: $result = "<script type='text/javascript'>top.document.title = '$title - LON-CAPA "
1790: .&mt('Construction Space')."';</script>";
1791: }
1792: return $result;
1793: }
1794:
1795: sub debug {
1796: if ($Apache::lonxml::debug eq "1") {
1797: $|=1;
1798: my $request=$Apache::lonxml::request;
1799: if (!$request) {
1800: eval { $request=Apache->request; };
1801: }
1802: if (!$request) {
1803: eval { $request=Apache2::RequestUtil->request; };
1804: }
1805: $request->print('<font size="-2"><pre>DEBUG:'.&HTML::Entities::encode($_[0],'<>&"')."</pre></font>\n");
1806: #&Apache::lonnet::logthis($_[0]);
1807: }
1808: }
1809:
1810: sub show_error_warn_msg {
1811: if ($env{'request.filename'} eq '/home/httpd/html/res/lib/templates/simpleproblem.problem' &&
1812: &Apache::lonnet::allowed('mdc',$env{'request.course.id'})) {
1813: return 1;
1814: }
1815: return (($Apache::lonxml::debug eq 1) ||
1816: ($env{'request.state'} eq 'construct') ||
1817: ($Apache::lonhomework::browse eq 'F'
1818: &&
1819: $env{'form.show_errors'} eq 'on'));
1820: }
1821:
1822: sub error {
1823: my @errors = @_;
1824:
1825: $errorcount++;
1826:
1827: if (defined($Apache::inputtags::part)) {
1828: if ( @Apache::inputtags::response ) {
1829: push(@errors,
1830: &mt("This error occurred while processing response [_1] in part [_2]",
1831: $Apache::inputtags::response[-1],
1832: $Apache::inputtags::part));
1833: } else {
1834: push(@errors,
1835: &mt("This error occurred while processing part [_1]",
1836: $Apache::inputtags::part));
1837: }
1838: }
1839:
1840: if ( &show_error_warn_msg() ) {
1841: # If printing in construction space, put the error inside <pre></pre>
1842: push(@Apache::lonxml::error_messages,
1843: $Apache::lonxml::warnings_error_header.
1844: "<b>".&mt('ERROR:')."</b>".join("<br />\n",@errors)."<br />\n");
1845: $Apache::lonxml::warnings_error_header='';
1846: } else {
1847: my $errormsg;
1848: my ($symb)=&Apache::lonnet::symbread();
1849: if ( !$symb ) {
1850: #public or browsers
1851: $errormsg=&mt("An error occured while processing this resource. The author has been notified.");
1852: }
1853: my $host=$Apache::lonnet::perlvar{'lonHostID'};
1854: push(@errors,
1855: &mt("The error occurred on host [_1]",
1856: "<tt>$host</tt>"));
1857:
1858: my $msg = join('<br />', @errors);
1859:
1860: #notify author
1861: &Apache::lonmsg::author_res_msg($env{'request.filename'},$msg);
1862: #notify course
1863: if ( $symb && $env{'request.course.id'} ) {
1864: my $cnum=$env{'course.'.$env{'request.course.id'}.'.num'};
1865: my $cdom=$env{'course.'.$env{'request.course.id'}.'.domain'};
1866: my (undef,%users)=&Apache::lonmsg::decide_receiver(undef,0,1,1,1);
1867: my $declutter=&Apache::lonnet::declutter($env{'request.filename'});
1868: my $baseurl = &Apache::lonnet::clutter($declutter);
1869: my @userlist;
1870: foreach (keys %users) {
1871: my ($user,$domain) = split(/:/, $_);
1872: push(@userlist,"$user\@$domain");
1873: my $key=$declutter.'_'.$user.'_'.$domain;
1874: my %lastnotified=&Apache::lonnet::get('nohist_xmlerrornotifications',
1875: [$key],
1876: $cdom,$cnum);
1877: my $now=time;
1878: if ($now-$lastnotified{$key}>86400) {
1879: my $title = &Apache::lonnet::gettitle($symb);
1880: my $sentmessage;
1881: &Apache::lonmsg::user_normal_msg($user,$domain,
1882: "Error [$title]",$msg,'',$baseurl,'','',
1883: \$sentmessage,$symb,$title,1);
1884: &Apache::lonnet::put('nohist_xmlerrornotifications',
1885: {$key => $now},
1886: $cdom,$cnum);
1887: }
1888: }
1889: if ($env{'request.role.adv'}) {
1890: $errormsg=&mt("An error occured while processing this resource. The course personnel ([_1]) and the author have been notified.",join(', ',@userlist));
1891: } else {
1892: $errormsg=&mt("An error occured while processing this resource. The instructor has been notified.");
1893: }
1894: }
1895: push(@Apache::lonxml::error_messages,"<b>$errormsg</b> <br />");
1896: }
1897: }
1898:
1899: sub warning {
1900: $warningcount++;
1901:
1902: if ($env{'form.grade_target'} ne 'tex') {
1903: if ( &show_error_warn_msg() ) {
1904: push(@Apache::lonxml::warning_messages,
1905: $Apache::lonxml::warnings_error_header.
1906: "<b>W</b>ARNING<b>:</b>".join('<br />',@_)."<br />\n");
1907: $Apache::lonxml::warnings_error_header='';
1908: }
1909: }
1910: }
1911:
1912: sub info {
1913: if ($env{'form.grade_target'} ne 'tex'
1914: && $env{'request.state'} eq 'construct') {
1915: push(@Apache::lonxml::info_messages,join('<br />',@_)."<br />\n");
1916: }
1917: }
1918:
1919: sub message_location {
1920: return '__LONCAPA_INTERNAL_MESSAGE_LOCATION__';
1921: }
1922:
1923: sub add_messages {
1924: my ($msg)=@_;
1925: my $result=join(' ',
1926: @Apache::lonxml::info_messages,
1927: @Apache::lonxml::error_messages,
1928: @Apache::lonxml::warning_messages);
1929: undef(@Apache::lonxml::info_messages);
1930: undef(@Apache::lonxml::error_messages);
1931: undef(@Apache::lonxml::warning_messages);
1932: $$msg=~s/__LONCAPA_INTERNAL_MESSAGE_LOCATION__/$result/;
1933: $$msg=~s/__LONCAPA_INTERNAL_MESSAGE_LOCATION__//g;
1934: }
1935:
1936: sub get_param {
1937: my ($param,$parstack,$safeeval,$context,$case_insensitive) = @_;
1938: if ( ! $context ) { $context = -1; }
1939: my $args ='';
1940: if ( $#$parstack > (-2-$context) ) { $args=$$parstack[$context]; }
1941: if ( ! $Apache::lonxml::usestyle ) {
1942: $args=$Apache::lonxml::style_values.$args;
1943: }
1944: if ( ! $args ) { return undef; }
1945: if ( $case_insensitive ) {
1946: if ($args =~ s/(my (?:.*))(\$\Q$param\E[,\)])/$1.lc($2)/ei) {
1947: return &Apache::run::run("{$args;".'return $'.$param.'}',
1948: $safeeval); #'
1949: } else {
1950: return undef;
1951: }
1952: } else {
1953: if ( $args =~ /my .*\$\Q$param\E[,\)]/ ) {
1954: return &Apache::run::run("{$args;".'return $'.$param.'}',
1955: $safeeval); #'
1956: } else {
1957: return undef;
1958: }
1959: }
1960: }
1961:
1962: sub get_param_var {
1963: my ($param,$parstack,$safeeval,$context,$case_insensitive) = @_;
1964: if ( ! $context ) { $context = -1; }
1965: my $args ='';
1966: if ( $#$parstack > (-2-$context) ) { $args=$$parstack[$context]; }
1967: if ( ! $Apache::lonxml::usestyle ) {
1968: $args=$Apache::lonxml::style_values.$args;
1969: }
1970: &Apache::lonxml::debug("Args are $args param is $param");
1971: if ($case_insensitive) {
1972: if (! ($args=~s/(my (?:.*))(\$\Q$param\E[,\)])/$1.lc($2)/ei)) {
1973: return undef;
1974: }
1975: } elsif ( $args !~ /my .*\$\Q$param\E[,\)]/ ) { return undef; }
1976: my $value=&Apache::run::run("{$args;".'return $'.$param.'}',$safeeval); #'
1977: &Apache::lonxml::debug("first run is $value");
1978: if ($value =~ /^[\$\@\%][a-zA-Z_]\w*$/) {
1979: &Apache::lonxml::debug("doing second");
1980: my @result=&Apache::run::run("return $value",$safeeval,1);
1981: if (!defined($result[0])) {
1982: return $value
1983: } else {
1984: if (wantarray) { return @result; } else { return $result[0]; }
1985: }
1986: } else {
1987: return $value;
1988: }
1989: }
1990:
1991: sub register_insert_xml {
1992: my $parser = HTML::LCParser->new($Apache::lonnet::perlvar{'lonTabDir'}
1993: .'/insertlist.xml');
1994: my ($tagnum,$in_help)=(0,0);
1995: my @alltags;
1996: my $tag;
1997: while (my $token = $parser->get_token()) {
1998: if ($token->[0] eq 'S') {
1999: my $key;
2000: if ($token->[1] eq 'tag') {
2001: $tag = $token->[2]{'name'};
2002: $insertlist{"$tagnum.tag"} = $tag;
2003: $insertlist{"$tag.num"} = $tagnum;
2004: push(@alltags,$tag);
2005: } elsif ($in_help && $token->[1] eq 'file') {
2006: $key = $tag.'.helpfile';
2007: } elsif ($in_help && $token->[1] eq 'description') {
2008: $key = $tag.'.helpdesc';
2009: } elsif ($token->[1] eq 'description' ||
2010: $token->[1] eq 'color' ||
2011: $token->[1] eq 'show' ) {
2012: $key = $tag.'.'.$token->[1];
2013: } elsif ($token->[1] eq 'insert_sub') {
2014: $key = $tag.'.function';
2015: } elsif ($token->[1] eq 'help') {
2016: $in_help=1;
2017: } elsif ($token->[1] eq 'allow') {
2018: $key = $tag.'.allow';
2019: }
2020: if (defined($key)) {
2021: $insertlist{$key} = $parser->get_text();
2022: $insertlist{$key} =~ s/(^\s*|\s*$ )//gx;
2023: }
2024: } elsif ($token->[0] eq 'E') {
2025: if ($token->[1] eq 'tag') {
2026: undef($tag);
2027: $tagnum++;
2028: } elsif ($token->[1] eq 'help') {
2029: undef($in_help);
2030: }
2031: }
2032: }
2033:
2034: # parse the allows and ignore tags set to <show>no</show>
2035: foreach my $tag (@alltags) {
2036: next if (!exists($insertlist{"$tag.allow"}));
2037: my $allow = $insertlist{"$tag.allow"};
2038: foreach my $element (split(',',$allow)) {
2039: $element =~ s/(^\s*|\s*$ )//gx;
2040: if (!exists($insertlist{"$element.show"})
2041: || $insertlist{"$element.show"} ne 'no') {
2042: push(@{ $insertlist{$tag.'.which'} },$element);
2043: }
2044: }
2045: }
2046: }
2047:
2048: sub register_insert {
2049: return ®ister_insert_xml(@_);
2050: # &dump_insertlist('2');
2051: }
2052:
2053: sub dump_insertlist {
2054: my ($ext) = @_;
2055: open(XML,">/tmp/insertlist.xml.$ext");
2056: print XML ("<insertlist>");
2057: my $i=0;
2058:
2059: while (exists($insertlist{"$i.tag"})) {
2060: my $tag = $insertlist{"$i.tag"};
2061: print XML ("
2062: \t<tag name=\"$tag\">");
2063: if (defined($insertlist{"$tag.description"})) {
2064: print XML ("
2065: \t\t<description>".$insertlist{"$tag.description"}."</description>");
2066: }
2067: if (defined($insertlist{"$tag.color"})) {
2068: print XML ("
2069: \t\t<color>".$insertlist{"$tag.color"}."</color>");
2070: }
2071: if (defined($insertlist{"$tag.function"})) {
2072: print XML ("
2073: \t\t<insert_sub>".$insertlist{"$tag.function"}."</insert_sub>");
2074: }
2075: if (defined($insertlist{"$tag.show"})
2076: && $insertlist{"$tag.show"} ne 'yes') {
2077: print XML ("
2078: \t\t<show>".$insertlist{"$tag.show"}."</show>");
2079: }
2080: if (defined($insertlist{"$tag.helpfile"})) {
2081: print XML ("
2082: \t\t<help>
2083: \t\t\t<file>".$insertlist{"$tag.helpfile"}."</file>");
2084: if ($insertlist{"$tag.helpdesc"} ne '') {
2085: print XML ("
2086: \t\t\t<description>".$insertlist{"$tag.helpdesc"}."</description>");
2087: }
2088: print XML ("
2089: \t\t</help>");
2090: }
2091: if (defined($insertlist{"$tag.which"})) {
2092: print XML ("
2093: \t\t<allow>".join(',',sort(@{ $insertlist{"$tag.which"} }))."</allow>");
2094: }
2095: print XML ("
2096: \t</tag>");
2097: $i++;
2098: }
2099: print XML ("\n</insertlist>\n");
2100: close(XML);
2101: }
2102:
2103: sub description {
2104: my ($token)=@_;
2105: my $tag = &get_tag($token);
2106: return $insertlist{$tag.'.description'};
2107: }
2108:
2109: # Returns a list containing the help file, and the description
2110: sub helpinfo {
2111: my ($token)=@_;
2112: my $tag = &get_tag($token);
2113: return ($insertlist{$tag.'.helpfile'}, $insertlist{$tag.'.helpdesc'});
2114: }
2115:
2116: sub get_tag {
2117: my ($token)=@_;
2118: my $tagnum;
2119: my $tag=$token->[1];
2120: foreach my $namespace (reverse(@Apache::lonxml::namespace)) {
2121: my $testtag = $namespace.'::'.$tag;
2122: $tagnum = $insertlist{"$testtag.num"};
2123: last if (defined($tagnum));
2124: }
2125: if (!defined($tagnum)) {
2126: $tagnum = $Apache::lonxml::insertlist{"$tag.num"};
2127: }
2128: return $insertlist{"$tagnum.tag"};
2129: }
2130:
2131: 1;
2132: __END__
2133:
2134:
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