1: # The LearningOnline Network with CAPA
2: # XML Parser Module
3: #
4: # $Id: lonxml.pm,v 1.395 2006/01/13 10:33:25 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 $warningcount @htmlareafields);
44: use strict;
45: use HTML::LCParser();
46: use HTML::TreeBuilder();
47: use HTML::Entities();
48: use Safe();
49: use Safe::Hole();
50: use Math::Cephes();
51: use Math::Random();
52: use Opcode();
53: use POSIX qw(strftime);
54: use Time::HiRes qw( gettimeofday tv_interval );
55: use Symbol();
56:
57: sub register {
58: my ($space,@taglist) = @_;
59: foreach my $temptag (@taglist) {
60: push(@{ $Apache::lonxml::alltags{$temptag} },$space);
61: }
62: }
63:
64: sub deregister {
65: my ($space,@taglist) = @_;
66: foreach my $temptag (@taglist) {
67: my $tempspace = $Apache::lonxml::alltags{$temptag}[-1];
68: if ($tempspace eq $space) {
69: pop(@{ $Apache::lonxml::alltags{$temptag} });
70: }
71: }
72: #&printalltags();
73: }
74:
75: use Apache::Constants qw(:common);
76: use Apache::lontexconvert();
77: use Apache::style();
78: use Apache::run();
79: use Apache::londefdef();
80: use Apache::scripttag();
81: use Apache::languagetags();
82: use Apache::edit();
83: use Apache::inputtags();
84: use Apache::outputtags();
85: use Apache::lonnet;
86: use Apache::File();
87: use Apache::loncommon();
88: use Apache::lonfeedback();
89: use Apache::lonmsg();
90: use Apache::loncacc();
91: use Apache::lonlocal;
92:
93: #================================================== Main subroutine: xmlparse
94: #debugging control, to turn on debugging modify the correct handler
95: $Apache::lonxml::debug=0;
96:
97: # keeps count of the number of warnings and errors generated in a parse
98: $warningcount=0;
99: $errorcount=0;
100:
101: #path to the directory containing the file currently being processed
102: @pwd=();
103:
104: #these two are used for capturing a subset of the output for later processing,
105: #don't touch them directly use &startredirection and &endredirection
106: @outputstack = ();
107: $redirection = 0;
108:
109: #controls wheter the <import> tag actually does
110: $import = 1;
111: @extlinks=();
112:
113: # meta mode is a bit weird only some output is to be turned off
114: #<output> tag turns metamode off (defined in londefdef.pm)
115: $metamode = 0;
116:
117: # turns on and of run::evaluate actually derefencing var refs
118: $evaluate = 1;
119:
120: # data structure for eidt mode, determines what tags can go into what other tags
121: %insertlist=();
122:
123: # stores the list of active tag namespaces
124: @namespace=();
125:
126: # has the dynamic menu been updated to know about this resource
127: $Apache::lonxml::registered=0;
128:
129: # a pointer the the Apache request object
130: $Apache::lonxml::request='';
131:
132: # a problem number counter, and check on ether it is used
133: $Apache::lonxml::counter=1;
134: $Apache::lonxml::counter_changed=0;
135:
136: #internal check on whether to look at style defs
137: $Apache::lonxml::usestyle=1;
138:
139: #locations used to store the parameter string for style substitutions
140: $Apache::lonxml::style_values='';
141: $Apache::lonxml::style_end_values='';
142:
143: #array of ssi calls that need to occur after we are done parsing
144: @Apache::lonxml::ssi_info=();
145:
146: #should we do the postag variable interpolation
147: $Apache::lonxml::post_evaluate=1;
148:
149: #a header message to emit in the case of any generated warning or errors
150: $Apache::lonxml::warnings_error_header='';
151:
152: sub xmlbegin {
153: my ($style)=@_;
154: my $output='';
155: @htmlareafields=();
156: if ($env{'browser.mathml'}) {
157: $output='<?xml version="1.0"?>'
158: #.'<?xml-stylesheet type="text/css" href="/adm/MathML/mathml.css"?>'."\n"
159: # .'<!DOCTYPE html SYSTEM "/adm/MathML/mathml.dtd" '
160:
161: # .'<!DOCTYPE html PUBLIC "-//W3C//DTD XHTML 1.0 Transitional//EN" "http://www.w3.org/TR/xhtml1/DTD/xhtml1-transitional.dtd" [<!ENTITY mathns "http://www.w3.org/1998/Math/MathML">] >'
162: .'<!DOCTYPE html PUBLIC "-//W3C//DTD XHTML 1.1 plus MathML 2.0 plus SVG 1.1//EN" "http://www.w3.org/2002/04/xhtml-math-svg/xhtml-math-svg.dtd">'
163: .'<html xmlns:math="http://www.w3.org/1998/Math/MathML" '
164: .'xmlns="http://www.w3.org/1999/xhtml">';
165: } else {
166: $output='<!DOCTYPE html PUBLIC "-//W3C//DTD XHTML 1.0 Transitional//EN" "http://www.w3.org/TR/xhtml1/DTD/xhtml1-transitional.dtd"><html>';
167: }
168: if ($style eq 'encode') {
169: $output=&HTML::Entities::encode($output,'<>&"');
170: }
171: return $output;
172: }
173:
174: sub xmlend {
175: my ($target,$parser)=@_;
176: my $mode='xml';
177: my $status='OPEN';
178: if ($Apache::lonhomework::parsing_a_problem ||
179: $Apache::lonhomework::parsing_a_task ) {
180: $mode='problem';
181: $status=$Apache::inputtags::status[-1];
182: }
183: my $discussion;
184: &Apache::loncommon::get_unprocessed_cgi($ENV{'QUERY_STRING'},
185: ['LONCAPA_INTERNAL_no_discussion']);
186: if (! exists($env{'form.LONCAPA_INTERNAL_no_discussion'}) ||
187: $env{'form.LONCAPA_INTERNAL_no_discussion'} ne 'true') {
188: $discussion=&Apache::lonfeedback::list_discussion($mode,$status);
189: }
190: if ($target eq 'tex') {
191: $discussion.='<tex>\keephidden{ENDOFPROBLEM}\vskip 0.5mm\noindent\makebox[\textwidth/$number_of_columns][b]{\hrulefill}\end{document}</tex>';
192: &Apache::lonxml::newparser($parser,\$discussion,'');
193: return '';
194: } else {
195: return $discussion.&Apache::loncommon::endbodytag();
196: }
197: }
198:
199: sub tokeninputfield {
200: my $defhost=$Apache::lonnet::perlvar{'lonHostID'};
201: $defhost=~tr/a-z/A-Z/;
202: return (<<ENDINPUTFIELD)
203: <script type="text/javascript">
204: function updatetoken() {
205: var comp=new Array;
206: var barcode=unescape(document.tokeninput.barcode.value);
207: comp=barcode.split('*');
208: if (typeof(comp[0])!="undefined") {
209: document.tokeninput.codeone.value=comp[0];
210: }
211: if (typeof(comp[1])!="undefined") {
212: document.tokeninput.codetwo.value=comp[1];
213: }
214: if (typeof(comp[2])!="undefined") {
215: comp[2]=comp[2].toUpperCase();
216: document.tokeninput.codethree.value=comp[2];
217: }
218: document.tokeninput.barcode.value='';
219: }
220: </script>
221: <form method="post" name="tokeninput">
222: <table border="2" bgcolor="#FFFFBB">
223: <tr><th>DocID Checkin</th></tr>
224: <tr><td>
225: <table>
226: <tr>
227: <td>Scan in Barcode</td>
228: <td><input type="text" size="22" name="barcode"
229: onChange="updatetoken()"/></td>
230: </tr>
231: <tr><td><i>or</i> Type in DocID</td>
232: <td>
233: <input type="text" size="5" name="codeone" />
234: <b><font size="+2">*</font></b>
235: <input type="text" size="5" name="codetwo" />
236: <b><font size="+2">*</font></b>
237: <input type="text" size="10" name="codethree" value="$defhost"
238: onChange="this.value=this.value.toUpperCase()" />
239: </td></tr>
240: </table>
241: </td></tr>
242: <tr><td><input type="submit" value="Check in DocID" /></td></tr>
243: </table>
244: </form>
245: ENDINPUTFIELD
246: }
247:
248: sub maketoken {
249: my ($symb,$tuname,$tudom,$tcrsid)=@_;
250: unless ($symb) {
251: $symb=&Apache::lonnet::symbread();
252: }
253: unless ($tuname) {
254: $tuname=$env{'user.name'};
255: $tudom=$env{'user.domain'};
256: $tcrsid=$env{'request.course.id'};
257: }
258:
259: return &Apache::lonnet::checkout($symb,$tuname,$tudom,$tcrsid);
260: }
261:
262: sub printtokenheader {
263: my ($target,$token,$tsymb,$tcrsid,$tudom,$tuname)=@_;
264: unless ($token) { return ''; }
265:
266: my ($symb,$courseid,$domain,$name) = &Apache::lonxml::whichuser();
267: unless ($tsymb) {
268: $tsymb=$symb;
269: }
270: unless ($tuname) {
271: $tuname=$name;
272: $tudom=$domain;
273: $tcrsid=$courseid;
274: }
275:
276: my $plainname=&Apache::loncommon::plainname($tuname,$tudom);
277:
278: if ($target eq 'web') {
279: my %idhash=&Apache::lonnet::idrget($tudom,($tuname));
280: return
281: '<img align="right" src="/cgi-bin/barcode.png?encode='.$token.'" />'.
282: &mt('Checked out for').' '.$plainname.
283: '<br />'.&mt('User').': '.$tuname.' at '.$tudom.
284: '<br />'.&mt('ID').': '.$idhash{$tuname}.
285: '<br />'.&mt('CourseID').': '.$tcrsid.
286: '<br />'.&mt('Course').': '.$env{'course.'.$tcrsid.'.description'}.
287: '<br />'.&mt('DocID').': '.$token.
288: '<br />'.&mt('Time').': '.&Apache::lonlocal::locallocaltime().'<hr />';
289: } else {
290: return $token;
291: }
292: }
293:
294: sub fontsettings {
295: my $headerstring='';
296: if (($env{'browser.os'} eq 'mac') && (!$env{'browser.mathml'})) {
297: $headerstring.=
298: '<meta Content-Type="text/html; charset=x-mac-roman" />';
299: } elsif (!$env{'browser.mathml'} && $env{'browser.unicode'}) {
300: $headerstring.=
301: '<meta http-equiv="Content-Type" content="text/html; charset=utf-8" />';
302: }
303: return $headerstring;
304: }
305:
306: sub printalltags {
307: my $temp;
308: foreach $temp (sort keys %Apache::lonxml::alltags) {
309: &Apache::lonxml::debug("$temp -- ".
310: join(',',@{ $Apache::lonxml::alltags{$temp} }));
311: }
312: }
313:
314: sub xmlparse {
315: my ($request,$target,$content_file_string,$safeinit,%style_for_target) = @_;
316:
317: &setup_globals($request,$target);
318: &Apache::inputtags::initialize_inputtags();
319: &Apache::bridgetask::initialize_bridgetask();
320: &Apache::outputtags::initialize_outputtags();
321: &Apache::edit::initialize_edit();
322: &Apache::londefdef::initialize_londefdef();
323:
324: #
325: # do we have a course style file?
326: #
327:
328: if ($env{'request.course.id'} && $env{'request.state'} ne 'construct') {
329: my $bodytext=
330: $env{'course.'.$env{'request.course.id'}.'.default_xml_style'};
331: if ($bodytext) {
332: foreach my $file (split(',',$bodytext)) {
333: my $location=&Apache::lonnet::filelocation('',$file);
334: my $styletext=&Apache::lonnet::getfile($location);
335: if ($styletext ne '-1') {
336: %style_for_target = (%style_for_target,
337: &Apache::style::styleparser($target,$styletext));
338: }
339: }
340: }
341: } elsif ($env{'construct.style'} && ($env{'request.state'} eq 'construct')) {
342: my $location=&Apache::lonnet::filelocation('',$env{'construct.style'});
343: my $styletext=&Apache::lonnet::getfile($location);
344: if ($styletext ne '-1') {
345: %style_for_target = (%style_for_target,
346: &Apache::style::styleparser($target,$styletext));
347: }
348: }
349: #&printalltags();
350: my @pars = ();
351: my $pwd=$env{'request.filename'};
352: $pwd =~ s:/[^/]*$::;
353: &newparser(\@pars,\$content_file_string,$pwd);
354:
355: my $safeeval = new Safe;
356: my $safehole = new Safe::Hole;
357: &init_safespace($target,$safeeval,$safehole,$safeinit);
358: #-------------------- Redefinition of the target in the case of compound target
359:
360: ($target, my @tenta) = split('&&',$target);
361:
362: my @stack = ();
363: my @parstack = ();
364: &initdepth();
365: &init_alarm();
366: my $finaloutput = &inner_xmlparse($target,\@stack,\@parstack,\@pars,
367: $safeeval,\%style_for_target,1);
368:
369: if ($env{'request.uri'}) {
370: &writeallows($env{'request.uri'});
371: }
372: &do_registered_ssi();
373: if ($Apache::lonxml::counter_changed) { &store_counter() }
374:
375: &clean_safespace($safeeval);
376:
377: if ($env{'form.return_only_error_and_warning_counts'}) {
378: return "$errorcount:$warningcount";
379: }
380: return $finaloutput;
381: }
382:
383: sub latex_special_symbols {
384: my ($string,$where)=@_;
385: if ($where eq 'header') {
386: $string =~ s/(\\|_|\^)/ /g;
387: $string =~ s/(\$|%|\{|\})/\\$1/g;
388: $string =~ s/_/ /g;
389: $string=&Apache::lonprintout::character_chart($string);
390: # any & or # leftover should be safe to just escape
391: $string=~s/([^\\])\&/$1\\\&/g;
392: $string=~s/([^\\])\#/$1\\\#/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: $Apache::lonxml::curdepth=join('_',@Apache::lonxml::depthcounter);
564: if (($token->[0] eq 'S') && ($target eq 'modified')) {
565: $deleted=&Apache::edit::handle_delete($space,$target,$token,$tagstack,
566: $parstack,$parser,$safeeval,
567: $style);
568: }
569: if (!$deleted) {
570: if ($space) {
571: #&Apache::lonxml::debug("Calling sub $sub in $space $metamode");
572: $sub1="$space\:\:$sub";
573: ($currentstring,$nodefault) = &$sub1($target,$token,$tagstack,
574: $parstack,$parser,$safeeval,
575: $style);
576: } else {
577: if ($target eq 'tex') {
578: # throw away tag name
579: return '';
580: }
581: #&Apache::lonxml::debug("NOT Calling sub $sub in $space $metamode");
582: if ($metamode <1) {
583: if (defined($token->[4]) && ($metamode < 1)) {
584: $currentstring = $token->[4];
585: } else {
586: $currentstring = $token->[2];
587: }
588: }
589: }
590: # &Apache::lonxml::debug("nodefalt:$nodefault:");
591: if ($currentstring eq '' && $nodefault eq '') {
592: if ($target eq 'edit') {
593: #&Apache::lonxml::debug("doing default edit for $token->[1]");
594: if ($token->[0] eq 'S') {
595: $currentstring = &Apache::edit::tag_start($target,$token);
596: } elsif ($token->[0] eq 'E') {
597: $currentstring = &Apache::edit::tag_end($target,$token);
598: }
599: } elsif ($target eq 'modified') {
600: if ($token->[0] eq 'S') {
601: $currentstring = $token->[4];
602: $currentstring.=&Apache::edit::handle_insert();
603: } elsif ($token->[0] eq 'E') {
604: $currentstring = $token->[2];
605: $currentstring.=&Apache::edit::handle_insertafter($token->[1]);
606: } else {
607: $currentstring = $token->[2];
608: }
609: }
610: }
611: }
612: use strict 'refs';
613: }
614: return $currentstring;
615: }
616:
617: sub setup_globals {
618: my ($request,$target)=@_;
619: $Apache::lonxml::request=$request;
620: $Apache::lonxml::registered = 0;
621: @Apache::lonxml::htmlareafields=();
622: $errorcount=0;
623: $warningcount=0;
624: $Apache::lonxml::default_homework_loaded=0;
625: $Apache::lonxml::usestyle=1;
626: &init_counter();
627: @Apache::lonxml::pwd=();
628: @Apache::lonxml::extlinks=();
629: @Apache::lonxml::ssi_info=();
630: $Apache::lonxml::post_evaluate=1;
631: $Apache::lonxml::warnings_error_header='';
632: if ($target eq 'meta') {
633: $Apache::lonxml::redirection = 0;
634: $Apache::lonxml::metamode = 1;
635: $Apache::lonxml::evaluate = 1;
636: $Apache::lonxml::import = 0;
637: } elsif ($target eq 'answer') {
638: $Apache::lonxml::redirection = 0;
639: $Apache::lonxml::metamode = 1;
640: $Apache::lonxml::evaluate = 1;
641: $Apache::lonxml::import = 1;
642: } elsif ($target eq 'grade') {
643: &startredirection(); #ended in inner_xmlparse on exit
644: $Apache::lonxml::metamode = 0;
645: $Apache::lonxml::evaluate = 1;
646: $Apache::lonxml::import = 1;
647: } elsif ($target eq 'modified') {
648: $Apache::lonxml::redirection = 0;
649: $Apache::lonxml::metamode = 0;
650: $Apache::lonxml::evaluate = 0;
651: $Apache::lonxml::import = 0;
652: } elsif ($target eq 'edit') {
653: $Apache::lonxml::redirection = 0;
654: $Apache::lonxml::metamode = 0;
655: $Apache::lonxml::evaluate = 0;
656: $Apache::lonxml::import = 0;
657: } elsif ($target eq 'analyze') {
658: $Apache::lonxml::redirection = 0;
659: $Apache::lonxml::metamode = 0;
660: $Apache::lonxml::evaluate = 1;
661: $Apache::lonxml::import = 1;
662: } else {
663: $Apache::lonxml::redirection = 0;
664: $Apache::lonxml::metamode = 0;
665: $Apache::lonxml::evaluate = 1;
666: $Apache::lonxml::import = 1;
667: }
668: }
669:
670: sub init_safespace {
671: my ($target,$safeeval,$safehole,$safeinit) = @_;
672: $safeeval->deny_only(':dangerous');
673: $safeeval->reval('use Math::Complex;');
674: $safeeval->permit_only(":default");
675: $safeeval->permit("entereval");
676: $safeeval->permit(":base_math");
677: $safeeval->permit("sort");
678: $safeeval->permit("time");
679: $safeeval->deny("rand");
680: $safeeval->deny("srand");
681: $safeeval->deny(":base_io");
682: $safehole->wrap(\&Apache::scripttag::xmlparse,$safeeval,'&xmlparse');
683: $safehole->wrap(\&Apache::outputtags::multipart,$safeeval,'&multipart');
684: $safehole->wrap(\&Apache::lonnet::EXT,$safeeval,'&EXT');
685: $safehole->wrap(\&Apache::chemresponse::chem_standard_order,$safeeval,
686: '&chem_standard_order');
687: $safehole->wrap(\&Apache::response::check_status,$safeeval,'&check_status');
688:
689: $safehole->wrap(\&Math::Cephes::asin,$safeeval,'&asin');
690: $safehole->wrap(\&Math::Cephes::acos,$safeeval,'&acos');
691: $safehole->wrap(\&Math::Cephes::atan,$safeeval,'&atan');
692: $safehole->wrap(\&Math::Cephes::sinh,$safeeval,'&sinh');
693: $safehole->wrap(\&Math::Cephes::cosh,$safeeval,'&cosh');
694: $safehole->wrap(\&Math::Cephes::tanh,$safeeval,'&tanh');
695: $safehole->wrap(\&Math::Cephes::asinh,$safeeval,'&asinh');
696: $safehole->wrap(\&Math::Cephes::acosh,$safeeval,'&acosh');
697: $safehole->wrap(\&Math::Cephes::atanh,$safeeval,'&atanh');
698: $safehole->wrap(\&Math::Cephes::erf,$safeeval,'&erf');
699: $safehole->wrap(\&Math::Cephes::erfc,$safeeval,'&erfc');
700: $safehole->wrap(\&Math::Cephes::j0,$safeeval,'&j0');
701: $safehole->wrap(\&Math::Cephes::j1,$safeeval,'&j1');
702: $safehole->wrap(\&Math::Cephes::jn,$safeeval,'&jn');
703: $safehole->wrap(\&Math::Cephes::jv,$safeeval,'&jv');
704: $safehole->wrap(\&Math::Cephes::y0,$safeeval,'&y0');
705: $safehole->wrap(\&Math::Cephes::y1,$safeeval,'&y1');
706: $safehole->wrap(\&Math::Cephes::yn,$safeeval,'&yn');
707: $safehole->wrap(\&Math::Cephes::yv,$safeeval,'&yv');
708:
709: $safehole->wrap(\&Math::Cephes::bdtr ,$safeeval,'&bdtr' );
710: $safehole->wrap(\&Math::Cephes::bdtrc ,$safeeval,'&bdtrc' );
711: $safehole->wrap(\&Math::Cephes::bdtri ,$safeeval,'&bdtri' );
712: $safehole->wrap(\&Math::Cephes::btdtr ,$safeeval,'&btdtr' );
713: $safehole->wrap(\&Math::Cephes::chdtr ,$safeeval,'&chdtr' );
714: $safehole->wrap(\&Math::Cephes::chdtrc,$safeeval,'&chdtrc');
715: $safehole->wrap(\&Math::Cephes::chdtri,$safeeval,'&chdtri');
716: $safehole->wrap(\&Math::Cephes::fdtr ,$safeeval,'&fdtr' );
717: $safehole->wrap(\&Math::Cephes::fdtrc ,$safeeval,'&fdtrc' );
718: $safehole->wrap(\&Math::Cephes::fdtri ,$safeeval,'&fdtri' );
719: $safehole->wrap(\&Math::Cephes::gdtr ,$safeeval,'&gdtr' );
720: $safehole->wrap(\&Math::Cephes::gdtrc ,$safeeval,'&gdtrc' );
721: $safehole->wrap(\&Math::Cephes::nbdtr ,$safeeval,'&nbdtr' );
722: $safehole->wrap(\&Math::Cephes::nbdtrc,$safeeval,'&nbdtrc');
723: $safehole->wrap(\&Math::Cephes::nbdtri,$safeeval,'&nbdtri');
724: $safehole->wrap(\&Math::Cephes::ndtr ,$safeeval,'&ndtr' );
725: $safehole->wrap(\&Math::Cephes::ndtri ,$safeeval,'&ndtri' );
726: $safehole->wrap(\&Math::Cephes::pdtr ,$safeeval,'&pdtr' );
727: $safehole->wrap(\&Math::Cephes::pdtrc ,$safeeval,'&pdtrc' );
728: $safehole->wrap(\&Math::Cephes::pdtri ,$safeeval,'&pdtri' );
729: $safehole->wrap(\&Math::Cephes::stdtr ,$safeeval,'&stdtr' );
730: $safehole->wrap(\&Math::Cephes::stdtri,$safeeval,'&stdtri');
731:
732: $safehole->wrap(\&Math::Cephes::Matrix::mat,$safeeval,'&mat');
733: $safehole->wrap(\&Math::Cephes::Matrix::new,$safeeval,
734: '&Math::Cephes::Matrix::new');
735: $safehole->wrap(\&Math::Cephes::Matrix::coef,$safeeval,
736: '&Math::Cephes::Matrix::coef');
737: $safehole->wrap(\&Math::Cephes::Matrix::clr,$safeeval,
738: '&Math::Cephes::Matrix::clr');
739: $safehole->wrap(\&Math::Cephes::Matrix::add,$safeeval,
740: '&Math::Cephes::Matrix::add');
741: $safehole->wrap(\&Math::Cephes::Matrix::sub,$safeeval,
742: '&Math::Cephes::Matrix::sub');
743: $safehole->wrap(\&Math::Cephes::Matrix::mul,$safeeval,
744: '&Math::Cephes::Matrix::mul');
745: $safehole->wrap(\&Math::Cephes::Matrix::div,$safeeval,
746: '&Math::Cephes::Matrix::div');
747: $safehole->wrap(\&Math::Cephes::Matrix::inv,$safeeval,
748: '&Math::Cephes::Matrix::inv');
749: $safehole->wrap(\&Math::Cephes::Matrix::transp,$safeeval,
750: '&Math::Cephes::Matrix::transp');
751: $safehole->wrap(\&Math::Cephes::Matrix::simq,$safeeval,
752: '&Math::Cephes::Matrix::simq');
753: $safehole->wrap(\&Math::Cephes::Matrix::mat_to_vec,$safeeval,
754: '&Math::Cephes::Matrix::mat_to_vec');
755: $safehole->wrap(\&Math::Cephes::Matrix::vec_to_mat,$safeeval,
756: '&Math::Cephes::Matrix::vec_to_mat');
757: $safehole->wrap(\&Math::Cephes::Matrix::check,$safeeval,
758: '&Math::Cephes::Matrix::check');
759: $safehole->wrap(\&Math::Cephes::Matrix::check,$safeeval,
760: '&Math::Cephes::Matrix::check');
761:
762: # $safehole->wrap(\&Math::Cephes::new_fract,$safeeval,'&new_fract');
763: # $safehole->wrap(\&Math::Cephes::radd,$safeeval,'&radd');
764: # $safehole->wrap(\&Math::Cephes::rsub,$safeeval,'&rsub');
765: # $safehole->wrap(\&Math::Cephes::rmul,$safeeval,'&rmul');
766: # $safehole->wrap(\&Math::Cephes::rdiv,$safeeval,'&rdiv');
767: # $safehole->wrap(\&Math::Cephes::euclid,$safeeval,'&euclid');
768:
769: $safehole->wrap(\&Math::Random::random_beta,$safeeval,'&math_random_beta');
770: $safehole->wrap(\&Math::Random::random_chi_square,$safeeval,'&math_random_chi_square');
771: $safehole->wrap(\&Math::Random::random_exponential,$safeeval,'&math_random_exponential');
772: $safehole->wrap(\&Math::Random::random_f,$safeeval,'&math_random_f');
773: $safehole->wrap(\&Math::Random::random_gamma,$safeeval,'&math_random_gamma');
774: $safehole->wrap(\&Math::Random::random_multivariate_normal,$safeeval,'&math_random_multivariate_normal');
775: $safehole->wrap(\&Math::Random::random_multinomial,$safeeval,'&math_random_multinomial');
776: $safehole->wrap(\&Math::Random::random_noncentral_chi_square,$safeeval,'&math_random_noncentral_chi_square');
777: $safehole->wrap(\&Math::Random::random_noncentral_f,$safeeval,'&math_random_noncentral_f');
778: $safehole->wrap(\&Math::Random::random_normal,$safeeval,'&math_random_normal');
779: $safehole->wrap(\&Math::Random::random_permutation,$safeeval,'&math_random_permutation');
780: $safehole->wrap(\&Math::Random::random_permuted_index,$safeeval,'&math_random_permuted_index');
781: $safehole->wrap(\&Math::Random::random_uniform,$safeeval,'&math_random_uniform');
782: $safehole->wrap(\&Math::Random::random_poisson,$safeeval,'&math_random_poisson');
783: $safehole->wrap(\&Math::Random::random_uniform_integer,$safeeval,'&math_random_uniform_integer');
784: $safehole->wrap(\&Math::Random::random_negative_binomial,$safeeval,'&math_random_negative_binomial');
785: $safehole->wrap(\&Math::Random::random_binomial,$safeeval,'&math_random_binomial');
786: $safehole->wrap(\&Math::Random::random_seed_from_phrase,$safeeval,'&random_seed_from_phrase');
787: $safehole->wrap(\&Math::Random::random_set_seed_from_phrase,$safeeval,'&random_set_seed_from_phrase');
788: $safehole->wrap(\&Math::Random::random_get_seed,$safeeval,'&random_get_seed');
789: $safehole->wrap(\&Math::Random::random_set_seed,$safeeval,'&random_set_seed');
790: $safehole->wrap(\&Apache::lonxml::error,$safeeval,'&LONCAPA_INTERNAL_ERROR');
791: $safehole->wrap(\&Apache::lonxml::debug,$safeeval,'&LONCAPA_INTERNAL_DEBUG');
792: $safehole->wrap(\&Apache::caparesponse::get_sigrange,$safeeval,'&LONCAPA_INTERNAL_get_sigrange');
793:
794: #need to inspect this class of ops
795: # $safeeval->deny(":base_orig");
796: $safeeval->permit("require");
797: $safeinit .= ';$external::target="'.$target.'";';
798: &Apache::run::run($safeinit,$safeeval);
799: &initialize_rndseed($safeeval);
800: }
801:
802: sub clean_safespace {
803: my ($safeeval) = @_;
804: delete_package_recurse($safeeval->{Root});
805: }
806:
807: sub delete_package_recurse {
808: my ($package) = @_;
809: my @subp;
810: {
811: no strict 'refs';
812: while (my ($key,$val) = each(%{*{"$package\::"}})) {
813: if (!defined($val)) { next; }
814: local (*ENTRY) = $val;
815: if (defined *ENTRY{HASH} && $key =~ /::$/ &&
816: $key ne "main::" && $key ne "<none>::")
817: {
818: my ($p) = $package ne "main" ? "$package\::" : "";
819: ($p .= $key) =~ s/::$//;
820: push(@subp,$p);
821: }
822: }
823: }
824: foreach my $p (@subp) {
825: delete_package_recurse($p);
826: }
827: Symbol::delete_package($package);
828: }
829:
830: sub initialize_rndseed {
831: my ($safeeval)=@_;
832: my $rndseed;
833: my ($symb,$courseid,$domain,$name) = &Apache::lonxml::whichuser();
834: $rndseed=&Apache::lonnet::rndseed($symb,$courseid,$domain,$name);
835: my $safeinit = '$external::randomseed="'.$rndseed.'";';
836: &Apache::lonxml::debug("Setting rndseed to $rndseed");
837: &Apache::run::run($safeinit,$safeeval);
838: }
839:
840: sub default_homework_load {
841: my ($safeeval)=@_;
842: &Apache::lonxml::debug('Loading default_homework');
843: my $default=&Apache::lonnet::getfile('/home/httpd/html/res/adm/includes/default_homework.lcpm');
844: if ($default eq -1) {
845: &Apache::lonxml::error("<b>Unable to find <i>default_homework.lcpm</i></b>");
846: } else {
847: &Apache::run::run($default,$safeeval);
848: $Apache::lonxml::default_homework_loaded=1;
849: }
850: }
851:
852: {
853: my $alarm_depth;
854: sub init_alarm {
855: alarm(0);
856: $alarm_depth=0;
857: }
858:
859: sub start_alarm {
860: if ($alarm_depth<1) {
861: my $old=alarm($Apache::lonnet::perlvar{'lonScriptTimeout'});
862: if ($old) {
863: &Apache::lonxml::error("Cancelled an alarm of $old, this shouldn't occur.");
864: }
865: }
866: $alarm_depth++;
867: }
868:
869: sub end_alarm {
870: $alarm_depth--;
871: if ($alarm_depth<1) { alarm(0); }
872: }
873: }
874: my $metamode_was;
875: sub startredirection {
876: if (!$Apache::lonxml::redirection) {
877: $metamode_was=$Apache::lonxml::metamode;
878: }
879: $Apache::lonxml::metamode=0;
880: $Apache::lonxml::redirection++;
881: push (@Apache::lonxml::outputstack, '');
882: }
883:
884: sub endredirection {
885: if (!$Apache::lonxml::redirection) {
886: &Apache::lonxml::error("Endredirection was called before a startredirection, perhaps you have unbalanced tags. Some debugging information:".join ":",caller);
887: return '';
888: }
889: $Apache::lonxml::redirection--;
890: if (!$Apache::lonxml::redirection) {
891: $Apache::lonxml::metamode=$metamode_was;
892: }
893: pop @Apache::lonxml::outputstack;
894: }
895:
896: sub end_tag {
897: my ($tagstack,$parstack,$token)=@_;
898: pop(@$tagstack);
899: pop(@$parstack);
900: &decreasedepth($token);
901: }
902:
903: sub initdepth {
904: @Apache::lonxml::depthcounter=();
905: $Apache::lonxml::depth=-1;
906: $Apache::lonxml::olddepth=-1;
907: }
908:
909: my @timers;
910: my $lasttime;
911: sub increasedepth {
912: my ($token) = @_;
913: $Apache::lonxml::depth++;
914: $Apache::lonxml::depthcounter[$Apache::lonxml::depth]++;
915: if ($Apache::lonxml::depthcounter[$Apache::lonxml::depth]==1) {
916: $Apache::lonxml::olddepth=$Apache::lonxml::depth;
917: }
918: my $time;
919: if ($Apache::lonxml::debug eq "1") {
920: push(@timers,[&gettimeofday()]);
921: $time=&tv_interval($lasttime);
922: $lasttime=[&gettimeofday()];
923: }
924: my $spacing=' 'x($Apache::lonxml::depth-1);
925: my $curdepth=join('_',@Apache::lonxml::depthcounter);
926: &Apache::lonxml::debug("s$spacing$Apache::lonxml::depth : $Apache::lonxml::olddepth : $curdepth : $token->[1] : $time : \n");
927: #print "<br />s $Apache::lonxml::depth : $Apache::lonxml::olddepth : $curdepth : $token->[1]\n";
928: }
929:
930: sub decreasedepth {
931: my ($token) = @_;
932: $Apache::lonxml::depth--;
933: if ($Apache::lonxml::depth<$Apache::lonxml::olddepth-1) {
934: $#Apache::lonxml::depthcounter--;
935: $Apache::lonxml::olddepth=$Apache::lonxml::depth+1;
936: }
937: if ( $Apache::lonxml::depth < -1) {
938: &Apache::lonxml::warning(&mt("Missing tags, unable to properly run file."));
939: $Apache::lonxml::depth='-1';
940: }
941: my ($timer,$time);
942: if ($Apache::lonxml::debug eq "1") {
943: $timer=pop(@timers);
944: $time=&tv_interval($lasttime);
945: $lasttime=[&gettimeofday()];
946: }
947: my $spacing=' 'x$Apache::lonxml::depth;
948: my $curdepth=join('_',@Apache::lonxml::depthcounter);
949: &Apache::lonxml::debug("e$spacing$Apache::lonxml::depth : $Apache::lonxml::olddepth : $curdepth : $token->[1] : $time : ".&tv_interval($timer)."\n");
950: #print "<br />e $Apache::lonxml::depth : $Apache::lonxml::olddepth : $token->[1] : $curdepth\n";
951: }
952:
953: sub get_all_text_unbalanced {
954: #there is a copy of this in lonpublisher.pm
955: my($tag,$pars)= @_;
956: my $token;
957: my $result='';
958: $tag='<'.$tag.'>';
959: while ($token = $$pars[-1]->get_token) {
960: if (($token->[0] eq 'T')||($token->[0] eq 'C')||($token->[0] eq 'D')) {
961: if ($token->[0] eq 'T' && $token->[2]) {
962: $result.='<![CDATA['.$token->[1].']]>';
963: } else {
964: $result.=$token->[1];
965: }
966: } elsif ($token->[0] eq 'PI') {
967: $result.=$token->[2];
968: } elsif ($token->[0] eq 'S') {
969: $result.=$token->[4];
970: } elsif ($token->[0] eq 'E') {
971: $result.=$token->[2];
972: }
973: if ($result =~ /\Q$tag\E/is) {
974: ($result,my $redo)=$result =~ /(.*)\Q$tag\E(.*)/is;
975: #&Apache::lonxml::debug('Got a winner with leftovers ::'.$2);
976: #&Apache::lonxml::debug('Result is :'.$1);
977: $redo=$tag.$redo;
978: &Apache::lonxml::newparser($pars,\$redo);
979: last;
980: }
981: }
982: return $result
983: }
984:
985: sub increment_counter {
986: my ($increment) = @_;
987: if (defined($increment) && $increment gt 0) {
988: $Apache::lonxml::counter+=$increment;
989: } else {
990: $Apache::lonxml::counter++;
991: }
992: $Apache::lonxml::counter_changed=1;
993: }
994:
995: sub init_counter {
996: if ($env{'request.state'} eq 'construct') {
997: $Apache::lonxml::counter=1;
998: $Apache::lonxml::counter_changed=1;
999: } elsif (defined($env{'form.counter'})) {
1000: $Apache::lonxml::counter=$env{'form.counter'};
1001: $Apache::lonxml::counter_changed=0;
1002: } else {
1003: $Apache::lonxml::counter=1;
1004: $Apache::lonxml::counter_changed=1;
1005: }
1006: }
1007:
1008: sub store_counter {
1009: &Apache::lonnet::appenv(('form.counter' => $Apache::lonxml::counter));
1010: return '';
1011: }
1012:
1013: sub get_all_text {
1014: my($tag,$pars,$style)= @_;
1015: my $gotfullstack=1;
1016: if (ref($pars) ne 'ARRAY') {
1017: $gotfullstack=0;
1018: $pars=[$pars];
1019: }
1020: if (ref($style) ne 'HASH') {
1021: $style={};
1022: }
1023: my $depth=0;
1024: my $token;
1025: my $result='';
1026: if ( $tag =~ m:^/: ) {
1027: my $tag=substr($tag,1);
1028: #&Apache::lonxml::debug("have:$tag:");
1029: my $top_empty=0;
1030: while (($depth >=0) && ($#$pars > -1) && (!$top_empty)) {
1031: while (($depth >=0) && ($token = $$pars[-1]->get_token)) {
1032: #&Apache::lonxml::debug("e token:$token->[0]:$depth:$token->[1]:".$#$pars.":".$#Apache::lonxml::pwd);
1033: if (($token->[0] eq 'T')||($token->[0] eq 'C')||($token->[0] eq 'D')) {
1034: if ($token->[2]) {
1035: $result.='<![CDATA['.$token->[1].']]>';
1036: } else {
1037: $result.=$token->[1];
1038: }
1039: } elsif ($token->[0] eq 'PI') {
1040: $result.=$token->[2];
1041: } elsif ($token->[0] eq 'S') {
1042: if ($token->[1] =~ /^\Q$tag\E$/i) { $depth++; }
1043: if ($token->[1] =~ /^LONCAPA_INTERNAL_TURN_STYLE_ON$/) { $Apache::lonxml::usestyle=1; }
1044: if ($token->[1] =~ /^LONCAPA_INTERNAL_TURN_STYLE_OFF$/) { $Apache::lonxml::usestyle=0; }
1045: $result.=$token->[4];
1046: } elsif ($token->[0] eq 'E') {
1047: if ( $token->[1] =~ /^\Q$tag\E$/i) { $depth--; }
1048: #skip sending back the last end tag
1049: if ($depth == 0 && exists($$style{'/'.$token->[1]}) && $Apache::lonxml::usestyle) {
1050: my $string=
1051: '<LONCAPA_INTERNAL_TURN_STYLE_OFF end="yes" />'.
1052: $$style{'/'.$token->[1]}.
1053: $token->[2].
1054: '<LONCAPA_INTERNAL_TURN_STYLE_ON />';
1055: &Apache::lonxml::newparser($pars,\$string);
1056: #&Apache::lonxml::debug("reParsing $string");
1057: next;
1058: }
1059: if ($depth > -1) {
1060: $result.=$token->[2];
1061: } else {
1062: $$pars[-1]->unget_token($token);
1063: }
1064: }
1065: }
1066: if (($depth >=0) && ($#$pars == 0) ) { $top_empty=1; }
1067: if (($depth >=0) && ($#$pars > 0) ) {
1068: pop(@$pars);
1069: pop(@Apache::lonxml::pwd);
1070: }
1071: }
1072: if ($top_empty && $depth >= 0) {
1073: #never found the end tag ran out of text, throw error send back blank
1074: &error('Never found end tag for <'.$tag.
1075: '> current string <pre>'.
1076: &HTML::Entities::encode($result,'<>&"').
1077: '</pre>');
1078: if ($gotfullstack) {
1079: my $newstring='</'.$tag.'>'.$result;
1080: &Apache::lonxml::newparser($pars,\$newstring);
1081: }
1082: $result='';
1083: }
1084: } else {
1085: while ($#$pars > -1) {
1086: while ($token = $$pars[-1]->get_token) {
1087: #&Apache::lonxml::debug("s token:$token->[0]:$depth:$token->[1]");
1088: if (($token->[0] eq 'T')||($token->[0] eq 'C')||
1089: ($token->[0] eq 'D')) {
1090: if ($token->[2]) {
1091: $result.='<![CDATA['.$token->[1].']]>';
1092: } else {
1093: $result.=$token->[1];
1094: }
1095: } elsif ($token->[0] eq 'PI') {
1096: $result.=$token->[2];
1097: } elsif ($token->[0] eq 'S') {
1098: if ( $token->[1] =~ /^\Q$tag\E$/i) {
1099: $$pars[-1]->unget_token($token); last;
1100: } else {
1101: $result.=$token->[4];
1102: }
1103: if ($token->[1] =~ /^LONCAPA_INTERNAL_TURN_STYLE_ON$/) { $Apache::lonxml::usestyle=1; }
1104: if ($token->[1] =~ /^LONCAPA_INTERNAL_TURN_STYLE_OFF$/) { $Apache::lonxml::usestyle=0; }
1105: } elsif ($token->[0] eq 'E') {
1106: $result.=$token->[2];
1107: }
1108: }
1109: if (($#$pars > 0) ) {
1110: pop(@$pars);
1111: pop(@Apache::lonxml::pwd);
1112: } else { last; }
1113: }
1114: }
1115: #&Apache::lonxml::debug("Exit:$result:");
1116: return $result
1117: }
1118:
1119: sub newparser {
1120: my ($parser,$contentref,$dir) = @_;
1121: push (@$parser,HTML::LCParser->new($contentref));
1122: $$parser[-1]->xml_mode(1);
1123: $$parser[-1]->marked_sections(1);
1124: if ( $dir eq '' ) {
1125: push (@Apache::lonxml::pwd, $Apache::lonxml::pwd[$#Apache::lonxml::pwd]);
1126: } else {
1127: push (@Apache::lonxml::pwd, $dir);
1128: }
1129: }
1130:
1131: sub parstring {
1132: my ($token) = @_;
1133: my $temp='';
1134: foreach (@{$token->[3]}) {
1135: unless ($_=~/\W/) {
1136: my $val=$token->[2]->{$_};
1137: $val =~ s/([\%\@\\\"\'])/\\$1/g;
1138: $val =~ s/(\$[^{a-zA-Z_])/\\$1/g;
1139: $val =~ s/(\$)$/\\$1/;
1140: #if ($val =~ m/^[\%\@]/) { $val="\\".$val; }
1141: $temp .= "my \$$_=\"$val\";";
1142: }
1143: }
1144: return $temp;
1145: }
1146:
1147: sub extlink {
1148: my ($res,$exact)=@_;
1149: if (!$exact) {
1150: $res=&Apache::lonnet::hreflocation($Apache::lonxml::pwd[-1],$res);
1151: }
1152: push(@Apache::lonxml::extlinks,$res)
1153: }
1154:
1155: sub writeallows {
1156: unless ($#extlinks>=0) { return; }
1157: my $thisurl = &Apache::lonnet::clutter(shift);
1158: if ($env{'httpref.'.$thisurl}) {
1159: $thisurl=$env{'httpref.'.$thisurl};
1160: }
1161: my $thisdir=$thisurl;
1162: $thisdir=~s/\/[^\/]+$//;
1163: my %httpref=();
1164: foreach (@extlinks) {
1165: $httpref{'httpref.'.
1166: &Apache::lonnet::hreflocation($thisdir,$_)}=$thisurl;
1167: }
1168: @extlinks=();
1169: &Apache::lonnet::appenv(%httpref);
1170: }
1171:
1172: sub register_ssi {
1173: my ($url,%form)=@_;
1174: push (@Apache::lonxml::ssi_info,{'url'=>$url,'form'=>\%form});
1175: return '';
1176: }
1177:
1178: sub do_registered_ssi {
1179: foreach my $info (@Apache::lonxml::ssi_info) {
1180: my %form=%{ $info->{'form'}};
1181: my $url=$info->{'url'};
1182: &Apache::lonnet::ssi($url,%form);
1183: }
1184: }
1185: #
1186: # Afterburner handles anchors, highlights and links
1187: #
1188: sub afterburn {
1189: my $result=shift;
1190: &Apache::loncommon::get_unprocessed_cgi($ENV{'QUERY_STRING'},
1191: ['highlight','anchor','link']);
1192: if ($env{'form.highlight'}) {
1193: foreach (split(/\,/,$env{'form.highlight'})) {
1194: my $anchorname=$_;
1195: my $matchthis=$anchorname;
1196: $matchthis=~s/\_+/\\s\+/g;
1197: $result=~s/(\Q$matchthis\E)/\<font color=\"red\"\>$1\<\/font\>/gs;
1198: }
1199: }
1200: if ($env{'form.link'}) {
1201: foreach (split(/\,/,$env{'form.link'})) {
1202: my ($anchorname,$linkurl)=split(/\>/,$_);
1203: my $matchthis=$anchorname;
1204: $matchthis=~s/\_+/\\s\+/g;
1205: $result=~s/(\Q$matchthis\E)/\<a href=\"$linkurl\"\>$1\<\/a\>/gs;
1206: }
1207: }
1208: if ($env{'form.anchor'}) {
1209: my $anchorname=$env{'form.anchor'};
1210: my $matchthis=$anchorname;
1211: $matchthis=~s/\_+/\\s\+/g;
1212: $result=~s/(\Q$matchthis\E)/\<a name=\"$anchorname\"\>$1\<\/a\>/s;
1213: $result.=(<<"ENDSCRIPT");
1214: <script type="text/javascript">
1215: document.location.hash='$anchorname';
1216: </script>
1217: ENDSCRIPT
1218: }
1219: return $result;
1220: }
1221:
1222: sub storefile {
1223: my ($file,$contents)=@_;
1224: &Apache::lonnet::correct_line_ends(\$contents);
1225: if (my $fh=Apache::File->new('>'.$file)) {
1226: print $fh $contents;
1227: $fh->close();
1228: return 1;
1229: } else {
1230: &warning("Unable to save file $file");
1231: return 0;
1232: }
1233: }
1234:
1235: sub createnewhtml {
1236: my $title=&mt('Title of document goes here');
1237: my $body=&mt('Body of document goes here');
1238: my $filecontents=(<<SIMPLECONTENT);
1239: <html>
1240: <head>
1241: <title>$title</title>
1242: </head>
1243: <body bgcolor="#FFFFFF">
1244: $body
1245: </body>
1246: </html>
1247: SIMPLECONTENT
1248: return $filecontents;
1249: }
1250:
1251: sub createnewsty {
1252: my $filecontents=(<<SIMPLECONTENT);
1253: <definetag name="">
1254: <render>
1255: <web></web>
1256: <tex></tex>
1257: </render>
1258: </definetag>
1259: SIMPLECONTENT
1260: return $filecontents;
1261: }
1262:
1263:
1264: sub inserteditinfo {
1265: my ($result,$filecontents,$filetype)=@_;
1266: $filecontents = &HTML::Entities::encode($filecontents,'<>&"');
1267: # my $editheader='<a href="#editsection">Edit below</a><hr />';
1268: my $xml_help = '';
1269: my $initialize='';
1270: if ($filetype eq 'html') {
1271: my $addbuttons=&Apache::lonhtmlcommon::htmlareaaddbuttons();
1272: $initialize=&Apache::lonhtmlcommon::htmlareaheaders().
1273: &Apache::lonhtmlcommon::spellheader();
1274: if (!&Apache::lonhtmlcommon::htmlareablocked() &&
1275: &Apache::lonhtmlcommon::htmlareabrowser()) {
1276: $initialize.=(<<FULLPAGE);
1277: <script type="text/javascript">
1278: $addbuttons
1279:
1280: HTMLArea.loadPlugin("FullPage");
1281:
1282: function initDocument() {
1283: var editor=new HTMLArea("filecont",config);
1284: editor.registerPlugin(FullPage);
1285: editor.generate();
1286: }
1287: </script>
1288: FULLPAGE
1289: } else {
1290: $initialize.=(<<FULLPAGE);
1291: <script type="text/javascript">
1292: $addbuttons
1293: function initDocument() {
1294: }
1295: </script>
1296: FULLPAGE
1297: }
1298: $result=~s/\<body([^\>]*)\>/\<body onload="initDocument()" $1\>/i;
1299: $xml_help=&Apache::loncommon::helpLatexCheatsheet();
1300: }
1301: my $cleanbut = '';
1302:
1303: my $titledisplay=&display_title();
1304: my %lt=&Apache::lonlocal::texthash('st' => 'Save this',
1305: 'vi' => 'View',
1306: 'ed' => 'Edit');
1307: my $buttons=(<<BUTTONS);
1308: $cleanbut
1309: <input type="submit" name="savethisfile" accesskey="s" value="$lt{'st'}" />
1310: <input type="submit" name="viewmode" accesskey="v" value="$lt{'vi'}" />
1311: BUTTONS
1312: $buttons.=&Apache::lonhtmlcommon::spelllink('xmledit','filecont');
1313: $buttons.=&Apache::lonhtmlcommon::htmlareaselectactive('filecont');
1314: my $editfooter=(<<ENDFOOTER);
1315: $initialize
1316: <hr />
1317: <a name="editsection" />
1318: <form method="post" name="xmledit">
1319: $xml_help
1320: <input type="hidden" name="editmode" value="$lt{'ed'}" />
1321: $buttons<br />
1322: <textarea style="width:100%" cols="80" rows="44" name="filecont" id="filecont">$filecontents</textarea>
1323: <br />$buttons
1324: <br />
1325: </form>
1326: $titledisplay
1327: </body>
1328: ENDFOOTER
1329: # $result=~s/(\<body[^\>]*\>)/$1$editheader/is;
1330: $result=~s/(\<\/body\>)/$editfooter/is;
1331: return $result;
1332: }
1333:
1334: sub get_target {
1335: my $viewgrades=&Apache::lonnet::allowed('vgr',$env{'request.course.id'});
1336: if ( $env{'request.state'} eq 'published') {
1337: if ( defined($env{'form.grade_target'})
1338: && ($viewgrades == 'F' )) {
1339: return ($env{'form.grade_target'});
1340: } elsif (defined($env{'form.grade_target'})) {
1341: if (($env{'form.grade_target'} eq 'web') ||
1342: ($env{'form.grade_target'} eq 'tex') ) {
1343: return $env{'form.grade_target'}
1344: } else {
1345: return 'web';
1346: }
1347: } else {
1348: return 'web';
1349: }
1350: } elsif ($env{'request.state'} eq 'construct') {
1351: if ( defined($env{'form.grade_target'})) {
1352: return ($env{'form.grade_target'});
1353: } else {
1354: return 'web';
1355: }
1356: } else {
1357: return 'web';
1358: }
1359: }
1360:
1361: sub handler {
1362: my $request=shift;
1363:
1364: my $target=&get_target();
1365:
1366: $Apache::lonxml::debug=$env{'user.debug'};
1367:
1368: &Apache::loncommon::content_type($request,'text/html');
1369: &Apache::loncommon::no_cache($request);
1370: if ($env{'request.state'} eq 'published') {
1371: $request->set_last_modified(&Apache::lonnet::metadata($request->uri,
1372: 'lastrevisiondate'));
1373: }
1374: $request->send_http_header;
1375:
1376: return OK if $request->header_only;
1377:
1378:
1379: my $file=&Apache::lonnet::filelocation("",$request->uri);
1380: my $filetype;
1381: if ($file =~ /\.sty$/) {
1382: $filetype='sty';
1383: } else {
1384: $filetype='html';
1385: }
1386: #
1387: # Edit action? Save file.
1388: #
1389: unless ($env{'request.state'} eq 'published') {
1390: if ($env{'form.savethisfile'}) {
1391: if (&storefile($file,$env{'form.filecont'})) {
1392: &Apache::lonxml::info("<font COLOR=\"#0000FF\">".
1393: &mt('Updated').": ".
1394: &Apache::lonlocal::locallocaltime(time).
1395: " </font>");
1396: }
1397: }
1398: }
1399: my %mystyle;
1400: my $result = '';
1401: my $filecontents=&Apache::lonnet::getfile($file);
1402: if ($filecontents eq -1) {
1403: my $bodytag=&Apache::loncommon::bodytag('File Error');
1404: my $fnf=&mt('File not found');
1405: $result=(<<ENDNOTFOUND);
1406: <html>
1407: <head>
1408: <title>$fnf</title>
1409: </head>
1410: $bodytag
1411: <b>$fnf: $file</b>
1412: </body>
1413: </html>
1414: ENDNOTFOUND
1415: $filecontents='';
1416: if ($env{'request.state'} ne 'published') {
1417: if ($filetype eq 'sty') {
1418: $filecontents=&createnewsty();
1419: } else {
1420: $filecontents=&createnewhtml();
1421: }
1422: $env{'form.editmode'}='Edit'; #force edit mode
1423: }
1424: } else {
1425: unless ($env{'request.state'} eq 'published') {
1426: if ($filecontents=~/BEGIN LON-CAPA Internal/) {
1427: &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.'));
1428: }
1429: #
1430: # we are in construction space, see if edit mode forced
1431: &Apache::loncommon::get_unprocessed_cgi($ENV{'QUERY_STRING'},
1432: ['editmode']);
1433: }
1434: if (!$env{'form.editmode'} || $env{'form.viewmode'}) {
1435: $result = &Apache::lonxml::xmlparse($request,$target,$filecontents,
1436: '',%mystyle);
1437: undef($Apache::lonhomework::parsing_a_task);
1438: &Apache::loncommon::get_unprocessed_cgi($ENV{'QUERY_STRING'},
1439: ['rawmode']);
1440: if ($env{'form.rawmode'}) { $result = $filecontents; }
1441: }
1442: }
1443:
1444: #
1445: # Edit action? Insert editing commands
1446: #
1447: unless ($env{'request.state'} eq 'published') {
1448: if ($env{'form.editmode'} && (!($env{'form.viewmode'}))) {
1449: my $displayfile=$request->uri;
1450: $displayfile=~s/^\/[^\/]*//;
1451: my $bodytag='<body bgcolor="#FFFFFF">';
1452: if ($env{'environment.remote'} eq 'off') {
1453: $bodytag=&Apache::loncommon::bodytag();
1454: }
1455: $result='<html>'.$bodytag.
1456: &Apache::lonxml::message_location().'<h3>'.
1457: $displayfile.
1458: '</h3></body></html>';
1459: $result=&inserteditinfo($result,$filecontents,$filetype);
1460: }
1461: }
1462: if ($filetype eq 'html') { writeallows($request->uri); }
1463:
1464:
1465: &Apache::lonxml::add_messages(\$result);
1466: $request->print($result);
1467:
1468: return OK;
1469: }
1470:
1471: sub display_title {
1472: my $result;
1473: if ($env{'request.state'} eq 'construct') {
1474: my $title=&Apache::lonnet::gettitle();
1475: if (!defined($title) || $title eq '') {
1476: $title = $env{'request.filename'};
1477: $title = substr($title, rindex($title, '/') + 1);
1478: }
1479: $result = "<script type='text/javascript'>top.document.title = '$title - LON-CAPA Construction Space';</script>";
1480: }
1481: return $result;
1482: }
1483:
1484: sub debug {
1485: if ($Apache::lonxml::debug eq "1") {
1486: $|=1;
1487: my $request=$Apache::lonxml::request;
1488: if (!$request) {
1489: eval { $request=Apache->request; };
1490: }
1491: if (!$request) {
1492: eval { $request=Apache2::RequestUtil->request; };
1493: }
1494: $request->print('<font size="-2"><pre>DEBUG:'.&HTML::Entities::encode($_[0],'<>&"')."</pre></font>\n");
1495: #&Apache::lonnet::logthis($_[0]);
1496: }
1497: }
1498:
1499: sub show_error_warn_msg {
1500: if ($env{'request.filename'} eq '/home/httpd/html/res/lib/templates/simpleproblem.problem' &&
1501: &Apache::lonnet::allowed('mdc',$env{'request.course.id'})) {
1502: return 1;
1503: }
1504: return (($Apache::lonxml::debug eq 1) ||
1505: ($env{'request.state'} eq 'construct') ||
1506: ($Apache::lonhomework::browse eq 'F'
1507: &&
1508: $env{'form.show_errors'} eq 'on'));
1509: }
1510:
1511: sub error {
1512: $errorcount++;
1513: if ( &show_error_warn_msg() ) {
1514: # If printing in construction space, put the error inside <pre></pre>
1515: push(@Apache::lonxml::error_messages,
1516: $Apache::lonxml::warnings_error_header.
1517: "<b>ERROR:</b>".join("<br />\n",@_)."<br />\n");
1518: $Apache::lonxml::warnings_error_header='';
1519: } else {
1520: my $errormsg;
1521: my ($symb)=&Apache::lonnet::symbread();
1522: if ( !$symb ) {
1523: #public or browsers
1524: $errormsg=&mt("An error occured while processing this resource. The author has been notified.");
1525: }
1526: #notify author
1527: &Apache::lonmsg::author_res_msg($env{'request.filename'},join('<br />',@_));
1528: #notify course
1529: if ( $symb && $env{'request.course.id'} ) {
1530: my $cnum=$env{'course.'.$env{'request.course.id'}.'.num'};
1531: my $cdom=$env{'course.'.$env{'request.course.id'}.'.domain'};
1532: my (undef,%users)=&Apache::lonfeedback::decide_receiver(undef,0,1,1,1);
1533: my $declutter=&Apache::lonnet::declutter($env{'request.filename'});
1534: my @userlist;
1535: foreach (keys %users) {
1536: my ($user,$domain) = split(/:/, $_);
1537: push(@userlist,"$user\@$domain");
1538: my $key=$declutter.'_'.$user.'_'.$domain;
1539: my %lastnotified=&Apache::lonnet::get('nohist_xmlerrornotifications',
1540: [$key],
1541: $cdom,$cnum);
1542: my $now=time;
1543: if ($now-$lastnotified{$key}>86400) {
1544: &Apache::lonmsg::user_normal_msg($user,$domain,
1545: "Error [$declutter]",join('<br />',@_));
1546: &Apache::lonnet::put('nohist_xmlerrornotifications',
1547: {$key => $now},
1548: $cdom,$cnum);
1549: }
1550: }
1551: if ($env{'request.role.adv'}) {
1552: $errormsg=&mt("An error occured while processing this resource. The course personnel ([_1]) and the author have been notified.",join(', ',@userlist));
1553: } else {
1554: $errormsg=&mt("An error occured while processing this resource. The instructor has been notified.");
1555: }
1556: }
1557: push(@Apache::lonxml::error_messages,"<b>$errormsg</b> <br />");
1558: }
1559: }
1560:
1561: sub warning {
1562: $warningcount++;
1563:
1564: if ($env{'form.grade_target'} ne 'tex') {
1565: if ( &show_error_warn_msg() ) {
1566: push(@Apache::lonxml::warning_messages,
1567: $Apache::lonxml::warnings_error_header.
1568: "<b>W</b>ARNING<b>:</b>".join('<br />',@_)."<br />\n");
1569: $Apache::lonxml::warnings_error_header='';
1570: }
1571: }
1572: }
1573:
1574: sub info {
1575: if ($env{'form.grade_target'} ne 'tex'
1576: && $env{'request.state'} eq 'construct') {
1577: push(@Apache::lonxml::info_messages,join('<br />',@_)."<br />\n");
1578: }
1579: }
1580:
1581: sub message_location {
1582: return '__LONCAPA_INTERNAL_MESSAGE_LOCATION__';
1583: }
1584:
1585: sub add_messages {
1586: my ($msg)=@_;
1587: my $result=join(' ',
1588: @Apache::lonxml::info_messages,
1589: @Apache::lonxml::error_messages,
1590: @Apache::lonxml::warning_messages);
1591: undef(@Apache::lonxml::info_messages);
1592: undef(@Apache::lonxml::error_messages);
1593: undef(@Apache::lonxml::warning_messages);
1594: $$msg=~s/__LONCAPA_INTERNAL_MESSAGE_LOCATION__/$result/;
1595: $$msg=~s/__LONCAPA_INTERNAL_MESSAGE_LOCATION__//g;
1596: }
1597:
1598: sub get_param {
1599: my ($param,$parstack,$safeeval,$context,$case_insensitive) = @_;
1600: if ( ! $context ) { $context = -1; }
1601: my $args ='';
1602: if ( $#$parstack > (-2-$context) ) { $args=$$parstack[$context]; }
1603: if ( ! $Apache::lonxml::usestyle ) {
1604: $args=$Apache::lonxml::style_values.$args;
1605: }
1606: if ( ! $args ) { return undef; }
1607: if ( $case_insensitive ) {
1608: if ($args =~ s/(my \$)(\Q$param\E)(=\")/$1.lc($2).$3/ei) {
1609: return &Apache::run::run("{$args;".'return $'.$param.'}',
1610: $safeeval); #'
1611: } else {
1612: return undef;
1613: }
1614: } else {
1615: if ( $args =~ /my \$\Q$param\E=\"/ ) {
1616: return &Apache::run::run("{$args;".'return $'.$param.'}',
1617: $safeeval); #'
1618: } else {
1619: return undef;
1620: }
1621: }
1622: }
1623:
1624: sub get_param_var {
1625: my ($param,$parstack,$safeeval,$context,$case_insensitive) = @_;
1626: if ( ! $context ) { $context = -1; }
1627: my $args ='';
1628: if ( $#$parstack > (-2-$context) ) { $args=$$parstack[$context]; }
1629: if ( ! $Apache::lonxml::usestyle ) {
1630: $args=$Apache::lonxml::style_values.$args;
1631: }
1632: &Apache::lonxml::debug("Args are $args param is $param");
1633: if ($case_insensitive) {
1634: if (! ($args=~s/(my \$)(\Q$param\E)(=\")/$1.lc($2).$3/ei)) {
1635: return undef;
1636: }
1637: } elsif ( $args !~ /my \$\Q$param\E=\"/ ) { return undef; }
1638: my $value=&Apache::run::run("{$args;".'return $'.$param.'}',$safeeval); #'
1639: &Apache::lonxml::debug("first run is $value");
1640: if ($value =~ /^[\$\@\%][a-zA-Z_]\w*$/) {
1641: &Apache::lonxml::debug("doing second");
1642: my @result=&Apache::run::run("return $value",$safeeval,1);
1643: if (!defined($result[0])) {
1644: return $value
1645: } else {
1646: if (wantarray) { return @result; } else { return $result[0]; }
1647: }
1648: } else {
1649: return $value;
1650: }
1651: }
1652:
1653: sub register_insert {
1654: my @data = split /\n/, &Apache::lonnet::getfile('/home/httpd/lonTabs/insertlist.tab');
1655: my $i;
1656: my $tagnum=0;
1657: my @order;
1658: for ($i=0;$i < $#data; $i++) {
1659: my $line = $data[$i];
1660: if ( $line =~ /^\#/ || $line =~ /^\s*\n/) { next; }
1661: if ( $line =~ /TABLE/ ) { last; }
1662: my ($tag,$descrip,$color,$function,$show,$helpfile,$helpdesc) = split(/,/, $line);
1663: if ($tag) {
1664: $insertlist{"$tagnum.tag"} = $tag;
1665: $insertlist{"$tagnum.description"} = $descrip;
1666: $insertlist{"$tagnum.color"} = $color;
1667: $insertlist{"$tagnum.function"} = $function;
1668: if (!defined($show)) { $show='yes'; }
1669: $insertlist{"$tagnum.show"}= $show;
1670: $insertlist{"$tagnum.helpfile"} = $helpfile;
1671: $insertlist{"$tagnum.helpdesc"} = $helpdesc;
1672: $insertlist{"$tag.num"}=$tagnum;
1673: $tagnum++;
1674: }
1675: }
1676: $i++; #skipping TABLE line
1677: $tagnum = 0;
1678: for (;$i < $#data;$i++) {
1679: my $line = $data[$i];
1680: my ($mnemonic,@which) = split(/ +/,$line);
1681: my $tag = $insertlist{"$tagnum.tag"};
1682: for (my $j=0;$j <=$#which;$j++) {
1683: if ( $which[$j] eq 'Y' ) {
1684: if ($insertlist{"$j.show"} ne 'no') {
1685: push(@{ $insertlist{"$tag.which"} },$j);
1686: }
1687: }
1688: }
1689: $tagnum++;
1690: }
1691: }
1692:
1693: sub description {
1694: my ($token)=@_;
1695: my $tagnum;
1696: my $tag=$token->[1];
1697: foreach my $namespace (reverse @Apache::lonxml::namespace) {
1698: my $testtag=$namespace.'::'.$tag;
1699: $tagnum=$insertlist{"$testtag.num"};
1700: if (defined($tagnum)) { last; }
1701: }
1702: if (!defined ($tagnum)) { $tagnum=$Apache::lonxml::insertlist{"$tag.num"}; }
1703: return $insertlist{$tagnum.'.description'};
1704: }
1705:
1706: # Returns a list containing the help file, and the description
1707: sub helpinfo {
1708: my ($token)=@_;
1709: my $tagnum;
1710: my $tag=$token->[1];
1711: foreach my $namespace (reverse @Apache::lonxml::namespace) {
1712: my $testtag=$namespace.'::'.$tag;
1713: $tagnum=$insertlist{"$testtag.num"};
1714: if (defined($tagnum)) { last; }
1715: }
1716: if (!defined ($tagnum)) { $tagnum=$Apache::lonxml::insertlist{"$tag.num"}; }
1717: return ($insertlist{$tagnum.'.helpfile'}, $insertlist{$tagnum.'.helpdesc'});
1718: }
1719:
1720: # ----------------------------------------------------------------- whichuser
1721: # returns a list of $symb, $courseid, $domain, $name that is correct for
1722: # calls to lonnet functions for this setup.
1723: # - looks for form.grade_ parameters
1724: sub whichuser {
1725: my ($passedsymb)=@_;
1726: my ($symb,$courseid,$domain,$name,$publicuser);
1727: if (defined($env{'form.grade_symb'})) {
1728: my ($tmp_courseid)=
1729: &Apache::loncommon::get_env_multiple('form.grade_courseid');
1730: my $allowed=&Apache::lonnet::allowed('vgr',$tmp_courseid);
1731: if (!$allowed &&
1732: exists($env{'request.course.sec'}) &&
1733: $env{'request.course.sec'} !~ /^\s*$/) {
1734: $allowed=&Apache::lonnet::allowed('vgr',$tmp_courseid.
1735: '/'.$env{'request.course.sec'});
1736: }
1737: if ($allowed) {
1738: ($symb)=&Apache::loncommon::get_env_multiple('form.grade_symb');
1739: $courseid=$tmp_courseid;
1740: ($domain)=&Apache::loncommon::get_env_multiple('form.grade_domain');
1741: ($name)=&Apache::loncommon::get_env_multiple('form.grade_username');
1742: return ($symb,$courseid,$domain,$name,$publicuser);
1743: }
1744: }
1745: if (!$passedsymb) {
1746: $symb=&Apache::lonnet::symbread();
1747: } else {
1748: $symb=$passedsymb;
1749: }
1750: $courseid=$env{'request.course.id'};
1751: $domain=$env{'user.domain'};
1752: $name=$env{'user.name'};
1753: if ($name eq 'public' && $domain eq 'public') {
1754: if (!defined($env{'form.username'})) {
1755: $env{'form.username'}.=time.rand(10000000);
1756: }
1757: $name.=$env{'form.username'};
1758: }
1759: return ($symb,$courseid,$domain,$name,$publicuser);
1760: }
1761:
1762: 1;
1763: __END__
1764:
1765:
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