File:
[LON-CAPA] /
loncom /
xml /
lonxml.pm
Revision
1.369:
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Fri Apr 1 18:08:14 2005 UTC (19 years, 2 months ago) by
albertel
Branches:
MAIN
CVS tags:
HEAD
- BUG# 2331, homework can be done in 'sequential' mode now, Only show part 2 once part 1 is correct, or unanswerable (tries exhausted)
- added new function &check_status($partid) to check the current status of a part
1: # The LearningOnline Network with CAPA
2: # XML Parser Module
3: #
4: # $Id: lonxml.pm,v 1.369 2005/04/01 18:08:14 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 $warningcount @htmlareafields);
44: use strict;
45: use HTML::LCParser();
46: use HTML::TreeBuilder();
47: use HTML::Entities();
48: use Safe();
49: use Safe::Hole();
50: use Math::Cephes();
51: use Math::Random();
52: use Opcode();
53: use POSIX qw(strftime);
54: use Time::HiRes qw( gettimeofday tv_interval );
55:
56: sub register {
57: my ($space,@taglist) = @_;
58: foreach my $temptag (@taglist) {
59: push(@{ $Apache::lonxml::alltags{$temptag} },$space);
60: }
61: }
62:
63: sub deregister {
64: my ($space,@taglist) = @_;
65: foreach my $temptag (@taglist) {
66: my $tempspace = $Apache::lonxml::alltags{$temptag}[-1];
67: if ($tempspace eq $space) {
68: pop(@{ $Apache::lonxml::alltags{$temptag} });
69: }
70: }
71: #&printalltags();
72: }
73:
74: use Apache::Constants qw(:common);
75: use Apache::lontexconvert();
76: use Apache::style();
77: use Apache::run();
78: use Apache::londefdef();
79: use Apache::scripttag();
80: use Apache::languagetags();
81: use Apache::edit();
82: use Apache::inputtags();
83: use Apache::outputtags();
84: use Apache::lonnet();
85: use Apache::File();
86: use Apache::loncommon();
87: use Apache::lonfeedback();
88: use Apache::lonmsg();
89: use Apache::loncacc();
90: use Apache::lonlocal;
91:
92: #================================================== Main subroutine: xmlparse
93: #debugging control, to turn on debugging modify the correct handler
94: $Apache::lonxml::debug=0;
95:
96: # keeps count of the number of warnings and errors generated in a parse
97: $warningcount=0;
98: $errorcount=0;
99:
100: #path to the directory containing the file currently being processed
101: @pwd=();
102:
103: #these two are used for capturing a subset of the output for later processing,
104: #don't touch them directly use &startredirection and &endredirection
105: @outputstack = ();
106: $redirection = 0;
107:
108: #controls wheter the <import> tag actually does
109: $import = 1;
110: @extlinks=();
111:
112: # meta mode is a bit weird only some output is to be turned off
113: #<output> tag turns metamode off (defined in londefdef.pm)
114: $metamode = 0;
115:
116: # turns on and of run::evaluate actually derefencing var refs
117: $evaluate = 1;
118:
119: # data structure for eidt mode, determines what tags can go into what other tags
120: %insertlist=();
121:
122: # stores the list of active tag namespaces
123: @namespace=();
124:
125: # has the dynamic menu been updated to know about this resource
126: $Apache::lonxml::registered=0;
127:
128: # a pointer the the Apache request object
129: $Apache::lonxml::request='';
130:
131: # a problem number counter, and check on ether it is used
132: $Apache::lonxml::counter=1;
133: $Apache::lonxml::counter_changed=0;
134:
135: #internal check on whether to look at style defs
136: $Apache::lonxml::usestyle=1;
137:
138: #locations used to store the parameter string for style substitutions
139: $Apache::lonxml::style_values='';
140: $Apache::lonxml::style_end_values='';
141:
142: #array of ssi calls that need to occur after we are done parsing
143: @Apache::lonxml::ssi_info=();
144:
145: #should we do the postag variable interpolation
146: $Apache::lonxml::post_evaluate=1;
147:
148: #a header message to emit in the case of any generated warning or errors
149: $Apache::lonxml::warnings_error_header='';
150:
151: sub xmlbegin {
152: my ($style)=@_;
153: my $output='';
154: @htmlareafields=();
155: if ($ENV{'browser.mathml'}) {
156: $output='<?xml version="1.0"?>'
157: #.'<?xml-stylesheet type="text/css" href="/adm/MathML/mathml.css"?>'."\n"
158: # .'<!DOCTYPE html SYSTEM "/adm/MathML/mathml.dtd" '
159:
160: # .'<!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">] >'
161: .'<!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">'
162: .'<html xmlns:math="http://www.w3.org/1998/Math/MathML" '
163: .'xmlns="http://www.w3.org/1999/xhtml">';
164: } else {
165: $output='<!DOCTYPE html PUBLIC "-//W3C//DTD XHTML 1.0 Transitional//EN" "http://www.w3.org/TR/xhtml1/DTD/xhtml1-transitional.dtd"><html>';
166: }
167: if ($style eq 'encode') {
168: $output=&HTML::Entities::encode($output,'<>&"');
169: }
170: return $output;
171: }
172:
173: sub xmlend {
174: my ($target,$parser)=@_;
175: my $mode='xml';
176: my $status='OPEN';
177: if ($Apache::lonhomework::parsing_a_problem ||
178: $Apache::lonhomework::parsing_a_task ) {
179: $mode='problem';
180: $status=$Apache::inputtags::status[-1];
181: }
182: my $discussion;
183: &Apache::loncommon::get_unprocessed_cgi
184: ($ENV{'query_string'},['LONCAPA_INTERNAL_no_discussion']);
185: if (! exists($ENV{'form.LONCAPA_INTERNAL_no_discussion'}) ||
186: $ENV{'form.LONCAPA_INTERNAL_no_discussion'} ne 'true') {
187: $discussion=&Apache::lonfeedback::list_discussion($mode,$status);
188: }
189: if ($target eq 'tex') {
190: $discussion.='<tex>\keephidden{ENDOFPROBLEM}\vskip 0.5mm\noindent\makebox[\textwidth/$number_of_columns][b]{\hrulefill}\end{document}</tex>';
191: &Apache::lonxml::newparser($parser,\$discussion,'');
192: return '';
193: } else {
194: return $discussion.&Apache::loncommon::endbodytag();
195: }
196: }
197:
198: sub tokeninputfield {
199: my $defhost=$Apache::lonnet::perlvar{'lonHostID'};
200: $defhost=~tr/a-z/A-Z/;
201: return (<<ENDINPUTFIELD)
202: <script type="text/javascript">
203: function updatetoken() {
204: var comp=new Array;
205: var barcode=unescape(document.tokeninput.barcode.value);
206: comp=barcode.split('*');
207: if (typeof(comp[0])!="undefined") {
208: document.tokeninput.codeone.value=comp[0];
209: }
210: if (typeof(comp[1])!="undefined") {
211: document.tokeninput.codetwo.value=comp[1];
212: }
213: if (typeof(comp[2])!="undefined") {
214: comp[2]=comp[2].toUpperCase();
215: document.tokeninput.codethree.value=comp[2];
216: }
217: document.tokeninput.barcode.value='';
218: }
219: </script>
220: <form method="post" name="tokeninput">
221: <table border="2" bgcolor="#FFFFBB">
222: <tr><th>DocID Checkin</th></tr>
223: <tr><td>
224: <table>
225: <tr>
226: <td>Scan in Barcode</td>
227: <td><input type="text" size="22" name="barcode"
228: onChange="updatetoken()"/></td>
229: </tr>
230: <tr><td><i>or</i> Type in DocID</td>
231: <td>
232: <input type="text" size="5" name="codeone" />
233: <b><font size="+2">*</font></b>
234: <input type="text" size="5" name="codetwo" />
235: <b><font size="+2">*</font></b>
236: <input type="text" size="10" name="codethree" value="$defhost"
237: onChange="this.value=this.value.toUpperCase()" />
238: </td></tr>
239: </table>
240: </td></tr>
241: <tr><td><input type="submit" value="Check in DocID" /></td></tr>
242: </table>
243: </form>
244: ENDINPUTFIELD
245: }
246:
247: sub maketoken {
248: my ($symb,$tuname,$tudom,$tcrsid)=@_;
249: unless ($symb) {
250: $symb=&Apache::lonnet::symbread();
251: }
252: unless ($tuname) {
253: $tuname=$ENV{'user.name'};
254: $tudom=$ENV{'user.domain'};
255: $tcrsid=$ENV{'request.course.id'};
256: }
257:
258: return &Apache::lonnet::checkout($symb,$tuname,$tudom,$tcrsid);
259: }
260:
261: sub printtokenheader {
262: my ($target,$token,$tsymb,$tcrsid,$tudom,$tuname)=@_;
263: unless ($token) { return ''; }
264:
265: my ($symb,$courseid,$domain,$name) = &Apache::lonxml::whichuser();
266: unless ($tsymb) {
267: $tsymb=$symb;
268: }
269: unless ($tuname) {
270: $tuname=$name;
271: $tudom=$domain;
272: $tcrsid=$courseid;
273: }
274:
275: my %reply=&Apache::lonnet::get('environment',
276: ['firstname','middlename','lastname','generation'],
277: $tudom,$tuname);
278: my $plainname=$reply{'firstname'}.' '.
279: $reply{'middlename'}.' '.
280: $reply{'lastname'}.' '.
281: $reply{'generation'};
282:
283: if ($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 fontsettings {
300: my $headerstring='';
301: if (($ENV{'browser.os'} eq 'mac') && (!$ENV{'browser.mathml'})) {
302: $headerstring.=
303: '<meta Content-Type="text/html; charset=x-mac-roman" />';
304: } elsif (!$ENV{'browser.mathml'} && $ENV{'browser.unicode'}) {
305: $headerstring.=
306: '<meta http-equiv="Content-Type" content="text/html; charset=utf-8" />';
307: }
308: return $headerstring;
309: }
310:
311: sub printalltags {
312: my $temp;
313: foreach $temp (sort keys %Apache::lonxml::alltags) {
314: &Apache::lonxml::debug("$temp -- ".
315: join(',',@{ $Apache::lonxml::alltags{$temp} }));
316: }
317: }
318:
319: sub xmlparse {
320: my ($request,$target,$content_file_string,$safeinit,%style_for_target) = @_;
321:
322: &setup_globals($request,$target);
323: &Apache::inputtags::initialize_inputtags();
324: &Apache::outputtags::initialize_outputtags();
325: &Apache::edit::initialize_edit();
326: &Apache::londefdef::initialize_londefdef();
327:
328: #
329: # do we have a course style file?
330: #
331:
332: if ($ENV{'request.course.id'} && $ENV{'request.state'} ne 'construct') {
333: my $bodytext=
334: $ENV{'course.'.$ENV{'request.course.id'}.'.default_xml_style'};
335: if ($bodytext) {
336: foreach my $file (split(',',$bodytext)) {
337: my $location=&Apache::lonnet::filelocation('',$file);
338: my $styletext=&Apache::lonnet::getfile($location);
339: if ($styletext ne '-1') {
340: %style_for_target = (%style_for_target,
341: &Apache::style::styleparser($target,$styletext));
342: }
343: }
344: }
345: } elsif ($ENV{'construct.style'} && ($ENV{'request.state'} eq 'construct')) {
346: my $location=&Apache::lonnet::filelocation('',$ENV{'construct.style'});
347: my $styletext=&Apache::lonnet::getfile($location);
348: if ($styletext ne '-1') {
349: %style_for_target = (%style_for_target,
350: &Apache::style::styleparser($target,$styletext));
351: }
352: }
353: #&printalltags();
354: my @pars = ();
355: my $pwd=$ENV{'request.filename'};
356: $pwd =~ s:/[^/]*$::;
357: &newparser(\@pars,\$content_file_string,$pwd);
358:
359: my $safeeval = new Safe;
360: my $safehole = new Safe::Hole;
361: &init_safespace($target,$safeeval,$safehole,$safeinit);
362: #-------------------- Redefinition of the target in the case of compound target
363:
364: ($target, my @tenta) = split('&&',$target);
365:
366: my @stack = ();
367: my @parstack = ();
368: &initdepth();
369: &init_alarm();
370: my $finaloutput = &inner_xmlparse($target,\@stack,\@parstack,\@pars,
371: $safeeval,\%style_for_target);
372:
373: if ($ENV{'request.uri'}) {
374: &writeallows($ENV{'request.uri'});
375: }
376: &do_registered_ssi();
377: if ($Apache::lonxml::counter_changed) { &store_counter() }
378: if ($ENV{'form.return_only_error_and_warning_counts'}) {
379: return "$errorcount:$warningcount";
380: }
381: return $finaloutput;
382: }
383:
384: sub htmlclean {
385: my ($raw,$full)=@_;
386: # Take care of CRLF etc
387:
388: $raw=~s/\r\f/\n/gs; $raw=~s/\f\r/\n/gs;
389: $raw=~s/\r\n/\n/gs; $raw=~s/\n\r/\n/gs;
390: $raw=~s/\f/\n/gs; $raw=~s/\r/\n/gs;
391: $raw=~s/\&\#10\;/\n/gs; $raw=~s/\&\#13\;/\n/gs;
392:
393: # Generate empty tags, remove wrong end tags
394: $raw=~s/\<(br|hr|img|meta|allow|basefont)([^\>\/]*?)\>/\<$1$2 \/\>/gis;
395: $raw=~s/\<\/(br|hr|img|meta|allow|basefont)\>//gis;
396: unless ($full) {
397: $raw=~s/\<[\/]*(body|head|html)\>//gis;
398: }
399: # Make standard tags lowercase
400: foreach ('html','body','head','meta','h1','h2','h3','h4','b','i','m',
401: 'table','tr','td','th','p','br','hr','img','embed','font',
402: 'a','strong','center','title','basefont','li','ol','ul',
403: 'input','select','form','option','script','pre') {
404: $raw=~s/\<$_\s*\>/\<$_\>/gis;
405: $raw=~s/\<\/$_\s*\>/<\/$_\>/gis;
406: $raw=~s/\<$_\s([^\>]*)\>/<$_ $1\>/gis;
407: }
408: return $raw;
409: }
410:
411: sub latex_special_symbols {
412: my ($string,$where)=@_;
413: if ($where eq 'header') {
414: $string =~ s/(\\|_|\^)/ /g;
415: $string =~ s/(\$|%|\{|\})/\\$1/g;
416: $string =~ s/_/ /g;
417: $string=&Apache::lonprintout::character_chart($string);
418: # any & or # leftover should be safe to just escape
419: $string=~s/([^\\])\&/$1\\\&/g;
420: $string=~s/([^\\])\#/$1\\\#/g;
421: } else {
422: $string=~s/\\/\\ensuremath{\\backslash}/g;
423: $string=~s/\\\%|\%/\\\%/g;
424: $string=~s/\\{|{/\\{/g;
425: $string=~s/\\}|}/\\}/g;
426: $string=~s/\\\$|\$/\\\$/g;
427: $string=~s/\\\_|\_/\\\_/g;
428: $string=~s/([^\\]|^)(\~|\^)/$1\\$2\\strut /g;
429: $string=~s/(>|<)/\\ensuremath\{$1\}/g; #more or less
430: $string=&Apache::lonprintout::character_chart($string);
431: # any & or # leftover should be safe to just escape
432: $string=~s/\\\&|\&/\\\&/g;
433: $string=~s/\\\#|\#/\\\#/g;
434: $string=~s/\|/\$\\mid\$/g;
435: #single { or } How to escape?
436: }
437: return $string;
438: }
439:
440: sub inner_xmlparse {
441: my ($target,$stack,$parstack,$pars,$safeeval,$style_for_target)=@_;
442: my $finaloutput = '';
443: my $result;
444: my $token;
445: my $dontpop=0;
446: while ( $#$pars > -1 ) {
447: while ($token = $$pars['-1']->get_token) {
448: if (($token->[0] eq 'T') || ($token->[0] eq 'C') ) {
449: if ($metamode<1) {
450: my $text=$token->[1];
451: if ($token->[0] eq 'C' && $target eq 'tex') {
452: $text = '';
453: # $text = '%'.$text."\n";
454: }
455: $result.=$text;
456: }
457: } elsif (($token->[0] eq 'D')) {
458: if ($metamode<1 && $target eq 'web') {
459: my $text=$token->[1];
460: $result.=$text;
461: }
462: } elsif ($token->[0] eq 'PI') {
463: if ($metamode<1 && $target eq 'web') {
464: $result=$token->[2];
465: }
466: } elsif ($token->[0] eq 'S') {
467: # add tag to stack
468: push (@$stack,$token->[1]);
469: # add parameters list to another stack
470: push (@$parstack,&parstring($token));
471: &increasedepth($token);
472: if ($Apache::lonxml::usestyle &&
473: exists($$style_for_target{$token->[1]})) {
474: $Apache::lonxml::usestyle=0;
475: my $string=$$style_for_target{$token->[1]}.
476: '<LONCAPA_INTERNAL_TURN_STYLE_ON />';
477: &Apache::lonxml::newparser($pars,\$string);
478: $Apache::lonxml::style_values=$$parstack[-1];
479: $Apache::lonxml::style_end_values=$$parstack[-1];
480: } else {
481: $result = &callsub("start_$token->[1]", $target, $token, $stack,
482: $parstack, $pars, $safeeval, $style_for_target);
483: }
484: } elsif ($token->[0] eq 'E') {
485: if ($Apache::lonxml::usestyle &&
486: exists($$style_for_target{'/'."$token->[1]"})) {
487: $Apache::lonxml::usestyle=0;
488: my $string=$$style_for_target{'/'.$token->[1]}.
489: '<LONCAPA_INTERNAL_TURN_STYLE_ON end="'.$token->[1].'" />';
490: &Apache::lonxml::newparser($pars,\$string);
491: $Apache::lonxml::style_values=$Apache::lonxml::style_end_values;
492: $Apache::lonxml::style_end_values='';
493: $dontpop=1;
494: } else {
495: #clear out any tags that didn't end
496: while ($token->[1] ne $$stack['-1'] && ($#$stack > -1)) {
497: my $lasttag=$$stack[-1];
498: if ($token->[1] =~ /^\Q$lasttag\E$/i) {
499: &Apache::lonxml::warning('Using tag </'.$token->[1].'> on line '.$token->[3].' as end tag to <'.$$stack[-1].'>');
500: last;
501: } else {
502: &Apache::lonxml::warning('Found tag </'.$token->[1].'> on line '.$token->[3].' when looking for </'.$$stack[-1].'> in file');
503: &end_tag($stack,$parstack,$token);
504: }
505: }
506: $result = &callsub("end_$token->[1]", $target, $token, $stack,
507: $parstack, $pars,$safeeval, $style_for_target);
508: }
509: } else {
510: &Apache::lonxml::error("Unknown token event :$token->[0]:$token->[1]:");
511: }
512: #evaluate variable refs in result
513: if ($Apache::lonxml::post_evaluate &&$result ne "") {
514: my $extras;
515: if (!$Apache::lonxml::usestyle) {
516: $extras=$Apache::lonxml::style_values;
517: }
518: if ( $#$parstack > -1 ) {
519: $result=&Apache::run::evaluate($result,$safeeval,$extras.$$parstack[-1]);
520: } else {
521: $result= &Apache::run::evaluate($result,$safeeval,$extras);
522: }
523: }
524: $Apache::lonxml::post_evaluate=1;
525:
526: if (($token->[0] eq 'T') || ($token->[0] eq 'C') || ($token->[0] eq 'D') ) {
527: #Style file definitions should be correct
528: if ($target eq 'tex' && ($Apache::lonxml::usestyle)) {
529: $result=&latex_special_symbols($result);
530: }
531: }
532:
533: if ($Apache::lonxml::redirection) {
534: $Apache::lonxml::outputstack['-1'] .= $result;
535: } else {
536: $finaloutput.=$result;
537: }
538: $result = '';
539:
540: if ($token->[0] eq 'E' && !$dontpop) {
541: &end_tag($stack,$parstack,$token);
542: }
543: $dontpop=0;
544: }
545: if ($#$pars > -1) {
546: pop @$pars;
547: pop @Apache::lonxml::pwd;
548: }
549: }
550:
551: # if ($target eq 'meta') {
552: # $finaloutput.=&endredirection;
553: # }
554:
555:
556: if (($ENV{'QUERY_STRING'}) && ($target eq 'web')) {
557: $finaloutput=&afterburn($finaloutput);
558: }
559: return $finaloutput;
560: }
561:
562: ##
563: ## Looks to see if there is a subroutine defined for this tag. If so, call it,
564: ## otherwise do not call it as we do not know what it is.
565: ##
566: sub callsub {
567: my ($sub,$target,$token,$tagstack,$parstack,$parser,$safeeval,$style)=@_;
568: my $currentstring='';
569: my $nodefault;
570: {
571: my $sub1;
572: no strict 'refs';
573: my $tag=$token->[1];
574: # get utterly rid of extended html tags
575: if ($tag=~/^x\-/i) { return ''; }
576: my $space=$Apache::lonxml::alltags{$tag}[-1];
577: if (!$space) {
578: $tag=~tr/A-Z/a-z/;
579: $sub=~tr/A-Z/a-z/;
580: $space=$Apache::lonxml::alltags{$tag}[-1]
581: }
582:
583: my $deleted=0;
584: $Apache::lonxml::curdepth=join('_',@Apache::lonxml::depthcounter);
585: if (($token->[0] eq 'S') && ($target eq 'modified')) {
586: $deleted=&Apache::edit::handle_delete($space,$target,$token,$tagstack,
587: $parstack,$parser,$safeeval,
588: $style);
589: }
590: if (!$deleted) {
591: if ($space) {
592: #&Apache::lonxml::debug("Calling sub $sub in $space $metamode");
593: $sub1="$space\:\:$sub";
594: ($currentstring,$nodefault) = &$sub1($target,$token,$tagstack,
595: $parstack,$parser,$safeeval,
596: $style);
597: } else {
598: if ($target eq 'tex') {
599: # throw away tag name
600: return '';
601: }
602: #&Apache::lonxml::debug("NOT Calling sub $sub in $space $metamode");
603: if ($metamode <1) {
604: if (defined($token->[4]) && ($metamode < 1)) {
605: $currentstring = $token->[4];
606: } else {
607: $currentstring = $token->[2];
608: }
609: }
610: }
611: # &Apache::lonxml::debug("nodefalt:$nodefault:");
612: if ($currentstring eq '' && $nodefault eq '') {
613: if ($target eq 'edit') {
614: #&Apache::lonxml::debug("doing default edit for $token->[1]");
615: if ($token->[0] eq 'S') {
616: $currentstring = &Apache::edit::tag_start($target,$token);
617: } elsif ($token->[0] eq 'E') {
618: $currentstring = &Apache::edit::tag_end($target,$token);
619: }
620: } elsif ($target eq 'modified') {
621: if ($token->[0] eq 'S') {
622: $currentstring = $token->[4];
623: $currentstring.=&Apache::edit::handle_insert();
624: } elsif ($token->[0] eq 'E') {
625: $currentstring = $token->[2];
626: $currentstring.=&Apache::edit::handle_insertafter($token->[1]);
627: } else {
628: $currentstring = $token->[2];
629: }
630: }
631: }
632: }
633: use strict 'refs';
634: }
635: return $currentstring;
636: }
637:
638: sub setup_globals {
639: my ($request,$target)=@_;
640: $Apache::lonxml::request=$request;
641: $Apache::lonxml::registered = 0;
642: @Apache::lonxml::htmlareafields=();
643: $errorcount=0;
644: $warningcount=0;
645: $Apache::lonxml::default_homework_loaded=0;
646: $Apache::lonxml::usestyle=1;
647: &init_counter();
648: @Apache::lonxml::pwd=();
649: @Apache::lonxml::extlinks=();
650: @Apache::lonxml::ssi_info=();
651: $Apache::lonxml::post_evaluate=1;
652: $Apache::lonxml::warnings_error_header='';
653: if ($target eq 'meta') {
654: $Apache::lonxml::redirection = 0;
655: $Apache::lonxml::metamode = 1;
656: $Apache::lonxml::evaluate = 1;
657: $Apache::lonxml::import = 0;
658: } elsif ($target eq 'answer') {
659: $Apache::lonxml::redirection = 0;
660: $Apache::lonxml::metamode = 1;
661: $Apache::lonxml::evaluate = 1;
662: $Apache::lonxml::import = 1;
663: } elsif ($target eq 'grade') {
664: &startredirection;
665: $Apache::lonxml::metamode = 0;
666: $Apache::lonxml::evaluate = 1;
667: $Apache::lonxml::import = 1;
668: } elsif ($target eq 'modified') {
669: $Apache::lonxml::redirection = 0;
670: $Apache::lonxml::metamode = 0;
671: $Apache::lonxml::evaluate = 0;
672: $Apache::lonxml::import = 0;
673: } elsif ($target eq 'edit') {
674: $Apache::lonxml::redirection = 0;
675: $Apache::lonxml::metamode = 0;
676: $Apache::lonxml::evaluate = 0;
677: $Apache::lonxml::import = 0;
678: } elsif ($target eq 'analyze') {
679: $Apache::lonxml::redirection = 0;
680: $Apache::lonxml::metamode = 0;
681: $Apache::lonxml::evaluate = 1;
682: $Apache::lonxml::import = 1;
683: } else {
684: $Apache::lonxml::redirection = 0;
685: $Apache::lonxml::metamode = 0;
686: $Apache::lonxml::evaluate = 1;
687: $Apache::lonxml::import = 1;
688: }
689: }
690:
691: sub init_safespace {
692: my ($target,$safeeval,$safehole,$safeinit) = @_;
693: $safeeval->permit("entereval");
694: $safeeval->permit(":base_math");
695: $safeeval->permit("sort");
696: $safeeval->permit("time");
697: $safeeval->deny(":base_io");
698: $safehole->wrap(\&Apache::scripttag::xmlparse,$safeeval,'&xmlparse');
699: $safehole->wrap(\&Apache::outputtags::multipart,$safeeval,'&multipart');
700: $safehole->wrap(\&Apache::lonnet::EXT,$safeeval,'&EXT');
701: $safehole->wrap(\&Apache::chemresponse::chem_standard_order,$safeeval,
702: '&chem_standard_order');
703: $safehole->wrap(\&Apache::response::check_status,$safeeval,'&check_status');
704:
705: $safehole->wrap(\&Math::Cephes::asin,$safeeval,'&asin');
706: $safehole->wrap(\&Math::Cephes::acos,$safeeval,'&acos');
707: $safehole->wrap(\&Math::Cephes::atan,$safeeval,'&atan');
708: $safehole->wrap(\&Math::Cephes::sinh,$safeeval,'&sinh');
709: $safehole->wrap(\&Math::Cephes::cosh,$safeeval,'&cosh');
710: $safehole->wrap(\&Math::Cephes::tanh,$safeeval,'&tanh');
711: $safehole->wrap(\&Math::Cephes::asinh,$safeeval,'&asinh');
712: $safehole->wrap(\&Math::Cephes::acosh,$safeeval,'&acosh');
713: $safehole->wrap(\&Math::Cephes::atanh,$safeeval,'&atanh');
714: $safehole->wrap(\&Math::Cephes::erf,$safeeval,'&erf');
715: $safehole->wrap(\&Math::Cephes::erfc,$safeeval,'&erfc');
716: $safehole->wrap(\&Math::Cephes::j0,$safeeval,'&j0');
717: $safehole->wrap(\&Math::Cephes::j1,$safeeval,'&j1');
718: $safehole->wrap(\&Math::Cephes::jn,$safeeval,'&jn');
719: $safehole->wrap(\&Math::Cephes::jv,$safeeval,'&jv');
720: $safehole->wrap(\&Math::Cephes::y0,$safeeval,'&y0');
721: $safehole->wrap(\&Math::Cephes::y1,$safeeval,'&y1');
722: $safehole->wrap(\&Math::Cephes::yn,$safeeval,'&yn');
723: $safehole->wrap(\&Math::Cephes::yv,$safeeval,'&yv');
724:
725: $safehole->wrap(\&Math::Cephes::bdtr ,$safeeval,'&bdtr' );
726: $safehole->wrap(\&Math::Cephes::bdtrc ,$safeeval,'&bdtrc' );
727: $safehole->wrap(\&Math::Cephes::bdtri ,$safeeval,'&bdtri' );
728: $safehole->wrap(\&Math::Cephes::btdtr ,$safeeval,'&btdtr' );
729: $safehole->wrap(\&Math::Cephes::chdtr ,$safeeval,'&chdtr' );
730: $safehole->wrap(\&Math::Cephes::chdtrc,$safeeval,'&chdtrc');
731: $safehole->wrap(\&Math::Cephes::chdtri,$safeeval,'&chdtri');
732: $safehole->wrap(\&Math::Cephes::fdtr ,$safeeval,'&fdtr' );
733: $safehole->wrap(\&Math::Cephes::fdtrc ,$safeeval,'&fdtrc' );
734: $safehole->wrap(\&Math::Cephes::fdtri ,$safeeval,'&fdtri' );
735: $safehole->wrap(\&Math::Cephes::gdtr ,$safeeval,'&gdtr' );
736: $safehole->wrap(\&Math::Cephes::gdtrc ,$safeeval,'&gdtrc' );
737: $safehole->wrap(\&Math::Cephes::nbdtr ,$safeeval,'&nbdtr' );
738: $safehole->wrap(\&Math::Cephes::nbdtrc,$safeeval,'&nbdtrc');
739: $safehole->wrap(\&Math::Cephes::nbdtri,$safeeval,'&nbdtri');
740: $safehole->wrap(\&Math::Cephes::ndtr ,$safeeval,'&ndtr' );
741: $safehole->wrap(\&Math::Cephes::ndtri ,$safeeval,'&ndtri' );
742: $safehole->wrap(\&Math::Cephes::pdtr ,$safeeval,'&pdtr' );
743: $safehole->wrap(\&Math::Cephes::pdtrc ,$safeeval,'&pdtrc' );
744: $safehole->wrap(\&Math::Cephes::pdtri ,$safeeval,'&pdtri' );
745: $safehole->wrap(\&Math::Cephes::stdtr ,$safeeval,'&stdtr' );
746: $safehole->wrap(\&Math::Cephes::stdtri,$safeeval,'&stdtri');
747:
748: # $safehole->wrap(\&Math::Cephes::new_fract,$safeeval,'&new_fract');
749: # $safehole->wrap(\&Math::Cephes::radd,$safeeval,'&radd');
750: # $safehole->wrap(\&Math::Cephes::rsub,$safeeval,'&rsub');
751: # $safehole->wrap(\&Math::Cephes::rmul,$safeeval,'&rmul');
752: # $safehole->wrap(\&Math::Cephes::rdiv,$safeeval,'&rdiv');
753: # $safehole->wrap(\&Math::Cephes::euclid,$safeeval,'&euclid');
754:
755: $safehole->wrap(\&Math::Random::random_beta,$safeeval,'&math_random_beta');
756: $safehole->wrap(\&Math::Random::random_chi_square,$safeeval,'&math_random_chi_square');
757: $safehole->wrap(\&Math::Random::random_exponential,$safeeval,'&math_random_exponential');
758: $safehole->wrap(\&Math::Random::random_f,$safeeval,'&math_random_f');
759: $safehole->wrap(\&Math::Random::random_gamma,$safeeval,'&math_random_gamma');
760: $safehole->wrap(\&Math::Random::random_multivariate_normal,$safeeval,'&math_random_multivariate_normal');
761: $safehole->wrap(\&Math::Random::random_multinomial,$safeeval,'&math_random_multinomial');
762: $safehole->wrap(\&Math::Random::random_noncentral_chi_square,$safeeval,'&math_random_noncentral_chi_square');
763: $safehole->wrap(\&Math::Random::random_noncentral_f,$safeeval,'&math_random_noncentral_f');
764: $safehole->wrap(\&Math::Random::random_normal,$safeeval,'&math_random_normal');
765: $safehole->wrap(\&Math::Random::random_permutation,$safeeval,'&math_random_permutation');
766: $safehole->wrap(\&Math::Random::random_permuted_index,$safeeval,'&math_random_permuted_index');
767: $safehole->wrap(\&Math::Random::random_uniform,$safeeval,'&math_random_uniform');
768: $safehole->wrap(\&Math::Random::random_poisson,$safeeval,'&math_random_poisson');
769: $safehole->wrap(\&Math::Random::random_uniform_integer,$safeeval,'&math_random_uniform_integer');
770: $safehole->wrap(\&Math::Random::random_negative_binomial,$safeeval,'&math_random_negative_binomial');
771: $safehole->wrap(\&Math::Random::random_binomial,$safeeval,'&math_random_binomial');
772: $safehole->wrap(\&Math::Random::random_seed_from_phrase,$safeeval,'&random_seed_from_phrase');
773: $safehole->wrap(\&Math::Random::random_set_seed_from_phrase,$safeeval,'&random_set_seed_from_phrase');
774: $safehole->wrap(\&Math::Random::random_get_seed,$safeeval,'&random_get_seed');
775: $safehole->wrap(\&Math::Random::random_set_seed,$safeeval,'&random_set_seed');
776: $safehole->wrap(\&Apache::lonxml::error,$safeeval,'&LONCAPA_INTERNAL_ERROR');
777: $safehole->wrap(\&Apache::lonxml::debug,$safeeval,'&LONCAPA_INTERNAL_DEBUG');
778: $safehole->wrap(\&Apache::caparesponse::get_sigrange,$safeeval,'&LONCAPA_INTERNAL_get_sigrange');
779:
780: #need to inspect this class of ops
781: # $safeeval->deny(":base_orig");
782: $safeeval->permit("require");
783: $safeinit .= ';$external::target="'.$target.'";';
784: my $rndseed;
785: my ($symb,$courseid,$domain,$name) = &Apache::lonxml::whichuser();
786: $rndseed=&Apache::lonnet::rndseed($symb,$courseid,$domain,$name);
787: $safeinit .= ';$external::randomseed="'.$rndseed.'";';
788: &Apache::lonxml::debug("Setting rndseed to $rndseed");
789: &Apache::run::run($safeinit,$safeeval);
790:
791: }
792:
793: sub default_homework_load {
794: my ($safeeval)=@_;
795: &Apache::lonxml::debug('Loading default_homework');
796: my $default=&Apache::lonnet::getfile('/home/httpd/html/res/adm/includes/default_homework.lcpm');
797: if ($default eq -1) {
798: &Apache::lonxml::error("<b>Unable to find <i>default_homework.lcpm</i></b>");
799: } else {
800: &Apache::run::run($default,$safeeval);
801: $Apache::lonxml::default_homework_loaded=1;
802: }
803: }
804:
805: {
806: my $alarm_depth;
807: sub init_alarm {
808: alarm(0);
809: $alarm_depth=0;
810: }
811:
812: sub start_alarm {
813: if ($alarm_depth<1) {
814: my $old=alarm($Apache::lonnet::perlvar{'lonScriptTimeout'});
815: if ($old) {
816: &Apache::lonxml::error("Cancelled an alarm of $old, this shouldn't occur.");
817: }
818: }
819: $alarm_depth++;
820: }
821:
822: sub end_alarm {
823: $alarm_depth--;
824: if ($alarm_depth<1) { alarm(0); }
825: }
826: }
827: my $metamode_was;
828: sub startredirection {
829: if (!$Apache::lonxml::redirection) {
830: $metamode_was=$Apache::lonxml::metamode;
831: }
832: $Apache::lonxml::metamode=0;
833: $Apache::lonxml::redirection++;
834: push (@Apache::lonxml::outputstack, '');
835: }
836:
837: sub endredirection {
838: if (!$Apache::lonxml::redirection) {
839: &Apache::lonxml::error("Endredirection was called, before a startredirection, perhaps you have unbalanced tags. Some debuging information:".join ":",caller);
840: return '';
841: }
842: $Apache::lonxml::redirection--;
843: if (!$Apache::lonxml::redirection) {
844: $Apache::lonxml::metamode=$metamode_was;
845: }
846: pop @Apache::lonxml::outputstack;
847: }
848:
849: sub end_tag {
850: my ($tagstack,$parstack,$token)=@_;
851: pop(@$tagstack);
852: pop(@$parstack);
853: &decreasedepth($token);
854: }
855:
856: sub initdepth {
857: @Apache::lonxml::depthcounter=();
858: $Apache::lonxml::depth=-1;
859: $Apache::lonxml::olddepth=-1;
860: }
861:
862: my @timers;
863: my $lasttime;
864: sub increasedepth {
865: my ($token) = @_;
866: $Apache::lonxml::depth++;
867: $Apache::lonxml::depthcounter[$Apache::lonxml::depth]++;
868: if ($Apache::lonxml::depthcounter[$Apache::lonxml::depth]==1) {
869: $Apache::lonxml::olddepth=$Apache::lonxml::depth;
870: }
871: my $time;
872: if ($Apache::lonxml::debug eq "1") {
873: push(@timers,[&gettimeofday()]);
874: $time=&tv_interval($lasttime);
875: $lasttime=[&gettimeofday()];
876: }
877: my $spacing=' 'x($Apache::lonxml::depth-1);
878: my $curdepth=join('_',@Apache::lonxml::depthcounter);
879: &Apache::lonxml::debug("s$spacing$Apache::lonxml::depth : $Apache::lonxml::olddepth : $curdepth : $token->[1] : $time : \n");
880: #print "<br />s $Apache::lonxml::depth : $Apache::lonxml::olddepth : $curdepth : $token->[1]\n";
881: }
882:
883: sub decreasedepth {
884: my ($token) = @_;
885: $Apache::lonxml::depth--;
886: if ($Apache::lonxml::depth<$Apache::lonxml::olddepth-1) {
887: $#Apache::lonxml::depthcounter--;
888: $Apache::lonxml::olddepth=$Apache::lonxml::depth+1;
889: }
890: if ( $Apache::lonxml::depth < -1) {
891: &Apache::lonxml::warning(&mt("Missing tags, unable to properly run file."));
892: $Apache::lonxml::depth='-1';
893: }
894: my ($timer,$time);
895: if ($Apache::lonxml::debug eq "1") {
896: $timer=pop(@timers);
897: $time=&tv_interval($lasttime);
898: $lasttime=[&gettimeofday()];
899: }
900: my $spacing=' 'x$Apache::lonxml::depth;
901: my $curdepth=join('_',@Apache::lonxml::depthcounter);
902: &Apache::lonxml::debug("e$spacing$Apache::lonxml::depth : $Apache::lonxml::olddepth : $curdepth : $token->[1] : $time : ".&tv_interval($timer)."\n");
903: #print "<br />e $Apache::lonxml::depth : $Apache::lonxml::olddepth : $token->[1] : $curdepth\n";
904: }
905:
906: sub get_all_text_unbalanced {
907: #there is a copy of this in lonpublisher.pm
908: my($tag,$pars)= @_;
909: my $token;
910: my $result='';
911: $tag='<'.$tag.'>';
912: while ($token = $$pars[-1]->get_token) {
913: if (($token->[0] eq 'T')||($token->[0] eq 'C')||($token->[0] eq 'D')) {
914: $result.=$token->[1];
915: } elsif ($token->[0] eq 'PI') {
916: $result.=$token->[2];
917: } elsif ($token->[0] eq 'S') {
918: $result.=$token->[4];
919: } elsif ($token->[0] eq 'E') {
920: $result.=$token->[2];
921: }
922: if ($result =~ /\Q$tag\E/is) {
923: ($result,my $redo)=$result =~ /(.*)\Q$tag\E(.*)/is;
924: #&Apache::lonxml::debug('Got a winner with leftovers ::'.$2);
925: #&Apache::lonxml::debug('Result is :'.$1);
926: $redo=$tag.$redo;
927: &Apache::lonxml::newparser($pars,\$redo);
928: last;
929: }
930: }
931: return $result
932: }
933:
934: sub increment_counter {
935: my ($increment) = @_;
936: if (defined($increment) && $increment gt 0) {
937: $Apache::lonxml::counter+=$increment;
938: } else {
939: $Apache::lonxml::counter++;
940: }
941: $Apache::lonxml::counter_changed=1;
942: }
943:
944: sub init_counter {
945: if (defined($ENV{'form.counter'})) {
946: $Apache::lonxml::counter=$ENV{'form.counter'};
947: $Apache::lonxml::counter_changed=0;
948: } else {
949: $Apache::lonxml::counter=1;
950: $Apache::lonxml::counter_changed=1;
951: }
952: }
953:
954: sub store_counter {
955: &Apache::lonnet::appenv(('form.counter' => $Apache::lonxml::counter));
956: return '';
957: }
958:
959: sub get_all_text {
960: my($tag,$pars,$style)= @_;
961: my $gotfullstack=1;
962: if (ref($pars) ne 'ARRAY') {
963: $gotfullstack=0;
964: $pars=[$pars];
965: }
966: if (ref($style) ne 'HASH') {
967: $style={};
968: }
969: my $depth=0;
970: my $token;
971: my $result='';
972: if ( $tag =~ m:^/: ) {
973: my $tag=substr($tag,1);
974: #&Apache::lonxml::debug("have:$tag:");
975: my $top_empty=0;
976: while (($depth >=0) && ($#$pars > -1) && (!$top_empty)) {
977: while (($depth >=0) && ($token = $$pars[-1]->get_token)) {
978: #&Apache::lonxml::debug("e token:$token->[0]:$depth:$token->[1]:".$#$pars.":".$#Apache::lonxml::pwd);
979: if (($token->[0] eq 'T')||($token->[0] eq 'C')||($token->[0] eq 'D')) {
980: $result.=$token->[1];
981: } elsif ($token->[0] eq 'PI') {
982: $result.=$token->[2];
983: } elsif ($token->[0] eq 'S') {
984: if ($token->[1] =~ /^\Q$tag\E$/i) { $depth++; }
985: if ($token->[1] =~ /^LONCAPA_INTERNAL_TURN_STYLE_ON$/) { $Apache::lonxml::usestyle=1; }
986: if ($token->[1] =~ /^LONCAPA_INTERNAL_TURN_STYLE_OFF$/) { $Apache::lonxml::usestyle=0; }
987: $result.=$token->[4];
988: } elsif ($token->[0] eq 'E') {
989: if ( $token->[1] =~ /^\Q$tag\E$/i) { $depth--; }
990: #skip sending back the last end tag
991: if ($depth == 0 && exists($$style{'/'.$token->[1]}) && $Apache::lonxml::usestyle) {
992: my $string=
993: '<LONCAPA_INTERNAL_TURN_STYLE_OFF end="yes" />'.
994: $$style{'/'.$token->[1]}.
995: $token->[2].
996: '<LONCAPA_INTERNAL_TURN_STYLE_ON />';
997: &Apache::lonxml::newparser($pars,\$string);
998: #&Apache::lonxml::debug("reParsing $string");
999: next;
1000: }
1001: if ($depth > -1) {
1002: $result.=$token->[2];
1003: } else {
1004: $$pars[-1]->unget_token($token);
1005: }
1006: }
1007: }
1008: if (($depth >=0) && ($#$pars == 0) ) { $top_empty=1; }
1009: if (($depth >=0) && ($#$pars > 0) ) {
1010: pop(@$pars);
1011: pop(@Apache::lonxml::pwd);
1012: }
1013: }
1014: if ($top_empty && $depth >= 0) {
1015: #never found the end tag ran out of text, throw error send back blank
1016: &error('Never found end tag for <'.$tag.
1017: '> current string <pre>'.
1018: &HTML::Entities::encode($result,'<>&"').
1019: '</pre>');
1020: if ($gotfullstack) {
1021: my $newstring='</'.$tag.'>'.$result;
1022: &Apache::lonxml::newparser($pars,\$newstring);
1023: }
1024: $result='';
1025: }
1026: } else {
1027: while ($#$pars > -1) {
1028: while ($token = $$pars[-1]->get_token) {
1029: #&Apache::lonxml::debug("s token:$token->[0]:$depth:$token->[1]");
1030: if (($token->[0] eq 'T')||($token->[0] eq 'C')||
1031: ($token->[0] eq 'D')) {
1032: $result.=$token->[1];
1033: } elsif ($token->[0] eq 'PI') {
1034: $result.=$token->[2];
1035: } elsif ($token->[0] eq 'S') {
1036: if ( $token->[1] =~ /^\Q$tag\E$/i) {
1037: $$pars[-1]->unget_token($token); last;
1038: } else {
1039: $result.=$token->[4];
1040: }
1041: if ($token->[1] =~ /^LONCAPA_INTERNAL_TURN_STYLE_ON$/) { $Apache::lonxml::usestyle=1; }
1042: if ($token->[1] =~ /^LONCAPA_INTERNAL_TURN_STYLE_OFF$/) { $Apache::lonxml::usestyle=0; }
1043: } elsif ($token->[0] eq 'E') {
1044: $result.=$token->[2];
1045: }
1046: }
1047: if (($#$pars > 0) ) {
1048: pop(@$pars);
1049: pop(@Apache::lonxml::pwd);
1050: } else { last; }
1051: }
1052: }
1053: #&Apache::lonxml::debug("Exit:$result:");
1054: return $result
1055: }
1056:
1057: sub newparser {
1058: my ($parser,$contentref,$dir) = @_;
1059: push (@$parser,HTML::LCParser->new($contentref));
1060: $$parser[-1]->xml_mode(1);
1061: $$parser[-1]->marked_sections(1);
1062: if ( $dir eq '' ) {
1063: push (@Apache::lonxml::pwd, $Apache::lonxml::pwd[$#Apache::lonxml::pwd]);
1064: } else {
1065: push (@Apache::lonxml::pwd, $dir);
1066: }
1067: }
1068:
1069: sub parstring {
1070: my ($token) = @_;
1071: my $temp='';
1072: foreach (@{$token->[3]}) {
1073: unless ($_=~/\W/) {
1074: my $val=$token->[2]->{$_};
1075: $val =~ s/([\%\@\\\"\'])/\\$1/g;
1076: $val =~ s/(\$[^{a-zA-Z_])/\\$1/g;
1077: $val =~ s/(\$)$/\\$1/;
1078: #if ($val =~ m/^[\%\@]/) { $val="\\".$val; }
1079: $temp .= "my \$$_=\"$val\";";
1080: }
1081: }
1082: return $temp;
1083: }
1084:
1085: sub writeallows {
1086: unless ($#extlinks>=0) { return; }
1087: my $thisurl='/res/'.&Apache::lonnet::declutter(shift);
1088: if ($ENV{'httpref.'.$thisurl}) {
1089: $thisurl=$ENV{'httpref.'.$thisurl};
1090: }
1091: my $thisdir=$thisurl;
1092: $thisdir=~s/\/[^\/]+$//;
1093: my %httpref=();
1094: foreach (@extlinks) {
1095: $httpref{'httpref.'.
1096: &Apache::lonnet::hreflocation($thisdir,$_)}=$thisurl;
1097: }
1098: @extlinks=();
1099: &Apache::lonnet::appenv(%httpref);
1100: }
1101:
1102: sub register_ssi {
1103: my ($url,%form)=@_;
1104: push (@Apache::lonxml::ssi_info,{'url'=>$url,'form'=>\%form});
1105: return '';
1106: }
1107:
1108: sub do_registered_ssi {
1109: foreach my $info (@Apache::lonxml::ssi_info) {
1110: my %form=%{ $info->{'form'}};
1111: my $url=$info->{'url'};
1112: &Apache::lonnet::ssi($url,%form);
1113: }
1114: }
1115: #
1116: # Afterburner handles anchors, highlights and links
1117: #
1118: sub afterburn {
1119: my $result=shift;
1120: &Apache::loncommon::get_unprocessed_cgi($ENV{'QUERY_STRING'},
1121: ['highlight','anchor','link']);
1122: if ($ENV{'form.highlight'}) {
1123: foreach (split(/\,/,$ENV{'form.highlight'})) {
1124: my $anchorname=$_;
1125: my $matchthis=$anchorname;
1126: $matchthis=~s/\_+/\\s\+/g;
1127: $result=~s/(\Q$matchthis\E)/\<font color=\"red\"\>$1\<\/font\>/gs;
1128: }
1129: }
1130: if ($ENV{'form.link'}) {
1131: foreach (split(/\,/,$ENV{'form.link'})) {
1132: my ($anchorname,$linkurl)=split(/\>/,$_);
1133: my $matchthis=$anchorname;
1134: $matchthis=~s/\_+/\\s\+/g;
1135: $result=~s/(\Q$matchthis\E)/\<a href=\"$linkurl\"\>$1\<\/a\>/gs;
1136: }
1137: }
1138: if ($ENV{'form.anchor'}) {
1139: my $anchorname=$ENV{'form.anchor'};
1140: my $matchthis=$anchorname;
1141: $matchthis=~s/\_+/\\s\+/g;
1142: $result=~s/(\Q$matchthis\E)/\<a name=\"$anchorname\"\>$1\<\/a\>/s;
1143: $result.=(<<"ENDSCRIPT");
1144: <script type="text/javascript">
1145: document.location.hash='$anchorname';
1146: </script>
1147: ENDSCRIPT
1148: }
1149: return $result;
1150: }
1151:
1152: sub storefile {
1153: my ($file,$contents)=@_;
1154: &Apache::lonnet::correct_line_ends(\$contents);
1155: if (my $fh=Apache::File->new('>'.$file)) {
1156: print $fh $contents;
1157: $fh->close();
1158: return 1;
1159: } else {
1160: &warning("Unable to save file $file");
1161: return 0;
1162: }
1163: }
1164:
1165: sub createnewhtml {
1166: my $title=&mt('Title of document goes here');
1167: my $body=&mt('Body of document goes here');
1168: my $filecontents=(<<SIMPLECONTENT);
1169: <!DOCTYPE html PUBLIC "-//W3C//DTD XHTML 1.1//EN" "http://www.w3.org/TR/xhtml/11/DTD/xhtml11.dtd">
1170: <html>
1171: <head>
1172: <title>$title</title>
1173: </head>
1174: <body bgcolor="#FFFFFF">
1175: $body
1176: </body>
1177: </html>
1178: SIMPLECONTENT
1179: return $filecontents;
1180: }
1181:
1182: sub createnewsty {
1183: my $filecontents=(<<SIMPLECONTENT);
1184: <definetag name="">
1185: <render>
1186: <web></web>
1187: <tex></tex>
1188: </render>
1189: </definetag>
1190: SIMPLECONTENT
1191: return $filecontents;
1192: }
1193:
1194:
1195: sub inserteditinfo {
1196: my ($result,$filecontents,$filetype)=@_;
1197: $filecontents = &HTML::Entities::encode($filecontents,'<>&"');
1198: # my $editheader='<a href="#editsection">Edit below</a><hr />';
1199: my $xml_help = '';
1200: my $initialize='';
1201: if ($filetype eq 'html') {
1202: my $addbuttons=&Apache::lonhtmlcommon::htmlareaaddbuttons();
1203: $initialize=&Apache::lonhtmlcommon::htmlareaheaders().
1204: &Apache::lonhtmlcommon::spellheader();
1205: if (!&Apache::lonhtmlcommon::htmlareablocked() &&
1206: &Apache::lonhtmlcommon::htmlareabrowser()) {
1207: $initialize.=(<<FULLPAGE);
1208: <script type="text/javascript">
1209: $addbuttons
1210:
1211: HTMLArea.loadPlugin("FullPage");
1212:
1213: function initDocument() {
1214: var editor=new HTMLArea("filecont",config);
1215: editor.registerPlugin(FullPage);
1216: editor.generate();
1217: }
1218: </script>
1219: FULLPAGE
1220: } else {
1221: $initialize.=(<<FULLPAGE);
1222: <script type="text/javascript">
1223: $addbuttons
1224: function initDocument() {
1225: }
1226: </script>
1227: FULLPAGE
1228: }
1229: $result=~s/\<body([^\>]*)\>/\<body onload="initDocument()" $1\>/i;
1230: $xml_help=&Apache::loncommon::helpLatexCheatsheet();
1231: }
1232: my $cleanbut = '';
1233: if ($filetype eq 'html') {
1234: $cleanbut='<input type="submit" name="attemptclean" value="'.
1235: &mt('Save and then attempt to clean HTML').'" />';
1236: }
1237: my $titledisplay=&display_title();
1238: my %lt=&Apache::lonlocal::texthash('st' => 'Save this',
1239: 'vi' => 'View',
1240: 'ed' => 'Edit');
1241: my $buttons=(<<BUTTONS);
1242: $cleanbut
1243: <input type="submit" name="savethisfile" accesskey="s" value="$lt{'st'}" />
1244: <input type="submit" name="viewmode" accesskey="v" value="$lt{'vi'}" />
1245: BUTTONS
1246: $buttons.=&Apache::lonhtmlcommon::spelllink('xmledit','filecont');
1247: $buttons.=&Apache::lonhtmlcommon::htmlareaselectactive('filecont');
1248: my $editfooter=(<<ENDFOOTER);
1249: $initialize
1250: <hr />
1251: <a name="editsection" />
1252: <form method="post" name="xmledit">
1253: $xml_help
1254: <input type="hidden" name="editmode" value="$lt{'ed'}" />
1255: $buttons<br />
1256: <textarea style="width:100%" cols="80" rows="44" name="filecont" id="filecont">$filecontents</textarea>
1257: <br />$buttons
1258: <br />
1259: </form>
1260: $titledisplay
1261: </body>
1262: ENDFOOTER
1263: # $result=~s/(\<body[^\>]*\>)/$1$editheader/is;
1264: $result=~s/(\<\/body\>)/$editfooter/is;
1265: return $result;
1266: }
1267:
1268: sub get_target {
1269: my $viewgrades=&Apache::lonnet::allowed('vgr',$ENV{'request.course.id'});
1270: if ( $ENV{'request.state'} eq 'published') {
1271: if ( defined($ENV{'form.grade_target'})
1272: && ($viewgrades == 'F' )) {
1273: return ($ENV{'form.grade_target'});
1274: } elsif (defined($ENV{'form.grade_target'})) {
1275: if (($ENV{'form.grade_target'} eq 'web') ||
1276: ($ENV{'form.grade_target'} eq 'tex') ) {
1277: return $ENV{'form.grade_target'}
1278: } else {
1279: return 'web';
1280: }
1281: } else {
1282: return 'web';
1283: }
1284: } elsif ($ENV{'request.state'} eq 'construct') {
1285: if ( defined($ENV{'form.grade_target'})) {
1286: return ($ENV{'form.grade_target'});
1287: } else {
1288: return 'web';
1289: }
1290: } else {
1291: return 'web';
1292: }
1293: }
1294:
1295: sub handler {
1296: my $request=shift;
1297:
1298: my $target=&get_target();
1299:
1300: $Apache::lonxml::debug=$ENV{'user.debug'};
1301:
1302: &Apache::loncommon::content_type($request,'text/html');
1303: &Apache::loncommon::no_cache($request);
1304: if ($ENV{'request.state'} eq 'published') {
1305: $request->set_last_modified(&Apache::lonnet::metadata($request->uri,
1306: 'lastrevisiondate'));
1307: }
1308: $request->send_http_header;
1309:
1310: return OK if $request->header_only;
1311:
1312:
1313: my $file=&Apache::lonnet::filelocation("",$request->uri);
1314: my $filetype;
1315: if ($file =~ /\.sty$/) {
1316: $filetype='sty';
1317: } else {
1318: $filetype='html';
1319: }
1320: #
1321: # Edit action? Save file.
1322: #
1323: unless ($ENV{'request.state'} eq 'published') {
1324: if (($ENV{'form.savethisfile'}) || ($ENV{'form.attemptclean'})) {
1325: if (&storefile($file,$ENV{'form.filecont'})) {
1326: &Apache::lonxml::info("<font COLOR=\"#0000FF\">".
1327: &mt('Updated').": ".
1328: &Apache::lonlocal::locallocaltime(time).
1329: " </font>");
1330: }
1331: }
1332: }
1333: my %mystyle;
1334: my $result = '';
1335: my $filecontents=&Apache::lonnet::getfile($file);
1336: if ($filecontents eq -1) {
1337: my $bodytag=&Apache::loncommon::bodytag('File Error');
1338: my $fnf=&mt('File not found');
1339: $result=(<<ENDNOTFOUND);
1340: <html>
1341: <head>
1342: <title>$fnf</title>
1343: </head>
1344: $bodytag
1345: <b>$fnf: $file</b>
1346: </body>
1347: </html>
1348: ENDNOTFOUND
1349: $filecontents='';
1350: if ($ENV{'request.state'} ne 'published') {
1351: if ($filetype eq 'sty') {
1352: $filecontents=&createnewsty();
1353: } else {
1354: $filecontents=&createnewhtml();
1355: }
1356: $ENV{'form.editmode'}='Edit'; #force edit mode
1357: }
1358: } else {
1359: unless ($ENV{'request.state'} eq 'published') {
1360: if ($filecontents=~/BEGIN LON-CAPA Internal/) {
1361: &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.'));
1362: }
1363:
1364: if ($ENV{'form.attemptclean'}) {
1365: $filecontents=&htmlclean($filecontents,1);
1366: }
1367: #
1368: # we are in construction space, see if edit mode forced
1369: &Apache::loncommon::get_unprocessed_cgi
1370: ($ENV{'QUERY_STRING'},['editmode']);
1371: }
1372: if (!$ENV{'form.editmode'} || $ENV{'form.viewmode'}) {
1373: $result = &Apache::lonxml::xmlparse($request,$target,$filecontents,
1374: '',%mystyle);
1375: undef($Apache::lonhomework::parsing_a_task);
1376: }
1377: }
1378:
1379: #
1380: # Edit action? Insert editing commands
1381: #
1382: unless ($ENV{'request.state'} eq 'published') {
1383: if ($ENV{'form.editmode'} && (!($ENV{'form.viewmode'}))) {
1384: my $displayfile=$request->uri;
1385: $displayfile=~s/^\/[^\/]*//;
1386: my $bodytag='<body bgcolor="#FFFFFF">';
1387: if ($ENV{'environment.remote'} eq 'off') {
1388: $bodytag=&Apache::loncommon::bodytag();
1389: }
1390: $result='<html>'.$bodytag.
1391: &Apache::lonxml::message_location().'<h3>'.
1392: $displayfile.
1393: '</h3></body></html>';
1394: $result=&inserteditinfo($result,$filecontents,$filetype);
1395: }
1396: }
1397: if ($filetype eq 'html') { writeallows($request->uri); }
1398:
1399:
1400: &Apache::lonxml::add_messages(\$result);
1401: $request->print($result);
1402:
1403: return OK;
1404: }
1405:
1406: sub display_title {
1407: my $result;
1408: if ($ENV{'request.state'} eq 'construct') {
1409: my $title=&Apache::lonnet::gettitle();
1410: if (!defined($title) || $title eq '') {
1411: $title = $ENV{'request.filename'};
1412: $title = substr($title, rindex($title, '/') + 1);
1413: }
1414: $result = "<script type='text/javascript'>top.document.title = '$title - LON-CAPA Construction Space';</script>";
1415: }
1416: return $result;
1417: }
1418:
1419: sub debug {
1420: if ($Apache::lonxml::debug eq "1") {
1421: $|=1;
1422: my $request=$Apache::lonxml::request;
1423: if (!$request) { $request=Apache->request; }
1424: $request->print('<font size="-2"><pre>DEBUG:'.&HTML::Entities::encode($_[0],'<>&"')."</pre></font>\n");
1425: #&Apache::lonnet::logthis($_[0]);
1426: }
1427: }
1428:
1429: sub show_error_warn_msg {
1430: if ($ENV{'request.filename'} eq '/home/httpd/html/res/lib/templates/simpleproblem.problem' &&
1431: &Apache::lonnet::allowed('mdc',$ENV{'request.course.id'})) {
1432: return 1;
1433: }
1434: return (($Apache::lonxml::debug eq 1) ||
1435: ($ENV{'request.state'} eq 'construct') ||
1436: ($Apache::lonhomework::browse eq 'F'
1437: &&
1438: $ENV{'form.show_errors'} eq 'on'));
1439: }
1440:
1441: sub error {
1442: $errorcount++;
1443: if ( &show_error_warn_msg() ) {
1444: # If printing in construction space, put the error inside <pre></pre>
1445: push(@Apache::lonxml::error_messages,
1446: $Apache::lonxml::warnings_error_header.
1447: "<b>ERROR:</b>".join("<br />\n",@_)."<br />\n");
1448: $Apache::lonxml::warnings_error_header='';
1449: } else {
1450: my $errormsg;
1451: my ($symb)=&Apache::lonnet::symbread();
1452: if ( !$symb ) {
1453: #public or browsers
1454: $errormsg=&mt("An error occured while processing this resource. The author has been notified.");
1455: }
1456: #notify author
1457: &Apache::lonmsg::author_res_msg($ENV{'request.filename'},join('<br />',@_));
1458: #notify course
1459: if ( $symb && $ENV{'request.course.id'} ) {
1460: my (undef,%users)=&Apache::lonfeedback::decide_receiver(undef,0,1,1,1);
1461: my $declutter=&Apache::lonnet::declutter($ENV{'request.filename'});
1462: my @userlist;
1463: foreach (keys %users) {
1464: my ($user,$domain) = split(/:/, $_);
1465: push(@userlist,"$user\@$domain");
1466: &Apache::lonmsg::user_normal_msg($user,$domain,
1467: "Error [$declutter]",join('<br />',@_));
1468: }
1469: if ($ENV{'request.role.adv'}) {
1470: $errormsg=&mt("An error occured while processing this resource. The course personnel ([_1]) and the author have been notified.",join(', ',@userlist));
1471: } else {
1472: $errormsg=&mt("An error occured while processing this resource. The instructor has been notified.");
1473: }
1474: }
1475: push(@Apache::lonxml::error_messages,"<b>$errormsg</b> <br />");
1476: }
1477: }
1478:
1479: sub warning {
1480: $warningcount++;
1481:
1482: if ($ENV{'form.grade_target'} ne 'tex') {
1483: if ( &show_error_warn_msg() ) {
1484: my $request=$Apache::lonxml::request;
1485: if (!$request) { $request=Apache->request; }
1486: push(@Apache::lonxml::warning_messages,
1487: $Apache::lonxml::warnings_error_header.
1488: "<b>W</b>ARNING<b>:</b>".join('<br />',@_)."<br />\n");
1489: $Apache::lonxml::warnings_error_header='';
1490: }
1491: }
1492: }
1493:
1494: sub info {
1495: if ($ENV{'form.grade_target'} ne 'tex'
1496: && $ENV{'request.state'} eq 'construct') {
1497: push(@Apache::lonxml::info_messages,join('<br />',@_)."<br />\n");
1498: }
1499: }
1500:
1501: sub message_location {
1502: return '__LONCAPA_INTERNAL_MESSAGE_LOCATION__';
1503: }
1504:
1505: sub add_messages {
1506: my ($msg)=@_;
1507: my $result=join(' ',
1508: @Apache::lonxml::info_messages,
1509: @Apache::lonxml::error_messages,
1510: @Apache::lonxml::warning_messages);
1511: undef(@Apache::lonxml::info_messages);
1512: undef(@Apache::lonxml::error_messages);
1513: undef(@Apache::lonxml::warning_messages);
1514: $$msg=~s/__LONCAPA_INTERNAL_MESSAGE_LOCATION__/$result/;
1515: $$msg=~s/__LONCAPA_INTERNAL_MESSAGE_LOCATION__//g;
1516: }
1517:
1518: sub get_param {
1519: my ($param,$parstack,$safeeval,$context,$case_insensitive) = @_;
1520: if ( ! $context ) { $context = -1; }
1521: my $args ='';
1522: if ( $#$parstack > (-2-$context) ) { $args=$$parstack[$context]; }
1523: if ( ! $Apache::lonxml::usestyle ) {
1524: $args=$Apache::lonxml::style_values.$args;
1525: }
1526: if ( ! $args ) { return undef; }
1527: if ( $case_insensitive ) {
1528: if ($args =~ s/(my \$)(\Q$param\E)(=\")/$1.lc($2).$3/ei) {
1529: return &Apache::run::run("{$args;".'return $'.$param.'}',
1530: $safeeval); #'
1531: } else {
1532: return undef;
1533: }
1534: } else {
1535: if ( $args =~ /my \$\Q$param\E=\"/ ) {
1536: return &Apache::run::run("{$args;".'return $'.$param.'}',
1537: $safeeval); #'
1538: } else {
1539: return undef;
1540: }
1541: }
1542: }
1543:
1544: sub get_param_var {
1545: my ($param,$parstack,$safeeval,$context,$case_insensitive) = @_;
1546: if ( ! $context ) { $context = -1; }
1547: my $args ='';
1548: if ( $#$parstack > (-2-$context) ) { $args=$$parstack[$context]; }
1549: if ( ! $Apache::lonxml::usestyle ) {
1550: $args=$Apache::lonxml::style_values.$args;
1551: }
1552: &Apache::lonxml::debug("Args are $args param is $param");
1553: if ($case_insensitive) {
1554: if (! ($args=~s/(my \$)(\Q$param\E)(=\")/$1.lc($2).$3/ei)) {
1555: return undef;
1556: }
1557: } elsif ( $args !~ /my \$\Q$param\E=\"/ ) { return undef; }
1558: my $value=&Apache::run::run("{$args;".'return $'.$param.'}',$safeeval); #'
1559: &Apache::lonxml::debug("first run is $value");
1560: if ($value =~ /^[\$\@\%][a-zA-Z_]\w*$/) {
1561: &Apache::lonxml::debug("doing second");
1562: my @result=&Apache::run::run("return $value",$safeeval,1);
1563: if (!defined($result[0])) {
1564: return $value
1565: } else {
1566: if (wantarray) { return @result; } else { return $result[0]; }
1567: }
1568: } else {
1569: return $value;
1570: }
1571: }
1572:
1573: sub register_insert {
1574: my @data = split /\n/, &Apache::lonnet::getfile('/home/httpd/lonTabs/insertlist.tab');
1575: my $i;
1576: my $tagnum=0;
1577: my @order;
1578: for ($i=0;$i < $#data; $i++) {
1579: my $line = $data[$i];
1580: if ( $line =~ /^\#/ || $line =~ /^\s*\n/) { next; }
1581: if ( $line =~ /TABLE/ ) { last; }
1582: my ($tag,$descrip,$color,$function,$show,$helpfile,$helpdesc) = split(/,/, $line);
1583: if ($tag) {
1584: $insertlist{"$tagnum.tag"} = $tag;
1585: $insertlist{"$tagnum.description"} = $descrip;
1586: $insertlist{"$tagnum.color"} = $color;
1587: $insertlist{"$tagnum.function"} = $function;
1588: if (!defined($show)) { $show='yes'; }
1589: $insertlist{"$tagnum.show"}= $show;
1590: $insertlist{"$tagnum.helpfile"} = $helpfile;
1591: $insertlist{"$tagnum.helpdesc"} = $helpdesc;
1592: $insertlist{"$tag.num"}=$tagnum;
1593: $tagnum++;
1594: }
1595: }
1596: $i++; #skipping TABLE line
1597: $tagnum = 0;
1598: for (;$i < $#data;$i++) {
1599: my $line = $data[$i];
1600: my ($mnemonic,@which) = split(/ +/,$line);
1601: my $tag = $insertlist{"$tagnum.tag"};
1602: for (my $j=0;$j <=$#which;$j++) {
1603: if ( $which[$j] eq 'Y' ) {
1604: if ($insertlist{"$j.show"} ne 'no') {
1605: push(@{ $insertlist{"$tag.which"} },$j);
1606: }
1607: }
1608: }
1609: $tagnum++;
1610: }
1611: }
1612:
1613: sub description {
1614: my ($token)=@_;
1615: my $tagnum;
1616: my $tag=$token->[1];
1617: foreach my $namespace (reverse @Apache::lonxml::namespace) {
1618: my $testtag=$namespace.'::'.$tag;
1619: $tagnum=$insertlist{"$testtag.num"};
1620: if (defined($tagnum)) { last; }
1621: }
1622: if (!defined ($tagnum)) { $tagnum=$Apache::lonxml::insertlist{"$tag.num"}; }
1623: return $insertlist{$tagnum.'.description'};
1624: }
1625:
1626: # Returns a list containing the help file, and the description
1627: sub helpinfo {
1628: my ($token)=@_;
1629: my $tagnum;
1630: my $tag=$token->[1];
1631: foreach my $namespace (reverse @Apache::lonxml::namespace) {
1632: my $testtag=$namespace.'::'.$tag;
1633: $tagnum=$insertlist{"$testtag.num"};
1634: if (defined($tagnum)) { last; }
1635: }
1636: if (!defined ($tagnum)) { $tagnum=$Apache::lonxml::insertlist{"$tag.num"}; }
1637: return ($insertlist{$tagnum.'.helpfile'}, $insertlist{$tagnum.'.helpdesc'});
1638: }
1639:
1640: # ----------------------------------------------------------------- whichuser
1641: # returns a list of $symb, $courseid, $domain, $name that is correct for
1642: # calls to lonnet functions for this setup.
1643: # - looks for form.grade_ parameters
1644: sub whichuser {
1645: my ($passedsymb)=@_;
1646: my ($symb,$courseid,$domain,$name,$publicuser);
1647: if (defined($ENV{'form.grade_symb'})) {
1648: my ($tmp_courseid)=
1649: &Apache::loncommon::get_env_multiple('form.grade_courseid');
1650: my $allowed=&Apache::lonnet::allowed('vgr',$tmp_courseid);
1651: if (!$allowed &&
1652: exists($ENV{'request.course.sec'}) &&
1653: $ENV{'request.course.sec'} !~ /^\s*$/) {
1654: $allowed=&Apache::lonnet::allowed('vgr',$tmp_courseid.
1655: '/'.$ENV{'request.course.sec'});
1656: }
1657: if ($allowed) {
1658: ($symb)=&Apache::loncommon::get_env_multiple('form.grade_symb');
1659: $courseid=$tmp_courseid;
1660: ($domain)=&Apache::loncommon::get_env_multiple('form.grade_domain');
1661: ($name)=&Apache::loncommon::get_env_multiple('form.grade_username');
1662: return ($symb,$courseid,$domain,$name,$publicuser);
1663: }
1664: }
1665: if (!$passedsymb) {
1666: $symb=&Apache::lonnet::symbread();
1667: } else {
1668: $symb=$passedsymb;
1669: }
1670: $courseid=$ENV{'request.course.id'};
1671: $domain=$ENV{'user.domain'};
1672: $name=$ENV{'user.name'};
1673: if ($name eq 'public' && $domain eq 'public') {
1674: if (!defined($ENV{'form.username'})) {
1675: $ENV{'form.username'}.=time.rand(10000000);
1676: }
1677: $name.=$ENV{'form.username'};
1678: }
1679: return ($symb,$courseid,$domain,$name,$publicuser);
1680: }
1681:
1682: 1;
1683: __END__
1684:
1685:
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