1: # The LearningOnline Network with CAPA
2: # XML Parser Module
3: #
4: # $Id: lonxml.pm,v 1.275 2003/09/11 22:37:54 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: # last modified 06/26/00 by Alexander Sakharuk
40: # 11/6 Gerd Kortemeyer
41: # 6/1/1 Gerd Kortemeyer
42: # 2/21,3/13 Guy
43: # 3/29,5/4 Gerd Kortemeyer
44: # 5/26 Gerd Kortemeyer
45: # 5/27 H. K. Ng
46: # 6/2,6/3,6/8,6/9 Gerd Kortemeyer
47: # 6/12,6/13 H. K. Ng
48: # 6/16 Gerd Kortemeyer
49: # 7/27 H. K. Ng
50: # 8/7,8/9,8/10,8/11,8/15,8/16,8/17,8/18,8/20,8/23,8/24 Gerd Kortemeyer
51: # Guy Albertelli
52: # 9/26 Gerd Kortemeyer
53: # Dec Guy Albertelli
54: # YEAR=2002
55: # 1/1 Gerd Kortemeyer
56: # 1/2 Matthew Hall
57: # 1/3 Gerd Kortemeyer
58: #
59:
60: package Apache::lonxml;
61: use vars
62: qw(@pwd @outputstack $redirection $import @extlinks $metamode $evaluate %insertlist @namespace $prevent_entity_encode $errorcount $warningcount);
63: use strict;
64: use HTML::LCParser();
65: use HTML::TreeBuilder();
66: use HTML::Entities();
67: use Safe();
68: use Safe::Hole();
69: use Math::Cephes();
70: use Math::Random();
71: use Opcode();
72: use POSIX qw(strftime);
73:
74:
75: sub register {
76: my ($space,@taglist) = @_;
77: foreach my $temptag (@taglist) {
78: push(@{ $Apache::lonxml::alltags{$temptag} },$space);
79: }
80: }
81:
82: sub deregister {
83: my ($space,@taglist) = @_;
84: foreach my $temptag (@taglist) {
85: my $tempspace = $Apache::lonxml::alltags{$temptag}[-1];
86: if ($tempspace eq $space) {
87: pop(@{ $Apache::lonxml::alltags{$temptag} });
88: }
89: }
90: #&printalltags();
91: }
92:
93: use Apache::Constants qw(:common);
94: use Apache::lontexconvert();
95: use Apache::style();
96: use Apache::run();
97: use Apache::londefdef();
98: use Apache::scripttag();
99: use Apache::edit();
100: use Apache::inputtags();
101: use Apache::outputtags();
102: use Apache::lonnet();
103: use Apache::File();
104: use Apache::loncommon();
105: use Apache::lonfeedback();
106: use Apache::lonmsg();
107: use Apache::loncacc();
108:
109: #================================================== Main subroutine: xmlparse
110: #debugging control, to turn on debugging modify the correct handler
111: $Apache::lonxml::debug=0;
112:
113: # keeps count of the number of warnings and errors generated in a parse
114: $warningcount=0;
115: $errorcount=0;
116:
117: #path to the directory containing the file currently being processed
118: @pwd=();
119:
120: #these two are used for capturing a subset of the output for later processing,
121: #don't touch them directly use &startredirection and &endredirection
122: @outputstack = ();
123: $redirection = 0;
124:
125: #controls wheter the <import> tag actually does
126: $import = 1;
127: @extlinks=();
128:
129: # meta mode is a bit weird only some output is to be turned off
130: #<output> tag turns metamode off (defined in londefdef.pm)
131: $metamode = 0;
132:
133: # turns on and of run::evaluate actually derefencing var refs
134: $evaluate = 1;
135:
136: # data structure for eidt mode, determines what tags can go into what other tags
137: %insertlist=();
138:
139: # stores the list of active tag namespaces
140: @namespace=();
141:
142: # if 0 all high ASCII characters will be encoded into HTML Entities
143: $prevent_entity_encode=0;
144:
145: # has the dynamic menu been updated to know about this resource
146: $Apache::lonxml::registered=0;
147:
148: # a pointer the the Apache request object
149: $Apache::lonxml::request='';
150:
151: # a problem number counter, and check on ether it is used
152: $Apache::lonxml::counter=1;
153: $Apache::lonxml::counter_changed=0;
154:
155: #internal check on whether to look at style defs
156: $Apache::lonxml::usestyle=1;
157:
158: #locations used to store the parameter string for style substitutions
159: $Apache::lonxml::style_values='';
160: $Apache::lonxml::style_end_values='';
161:
162: sub xmlbegin {
163: my $output='';
164: if ($ENV{'browser.mathml'}) {
165: $output='<?xml version="1.0"?>'
166: .'<?xml-stylesheet type="text/css" href="/adm/MathML/mathml.css"?>'
167: .'<!DOCTYPE html SYSTEM "/adm/MathML/mathml.dtd" '
168: .'[<!ENTITY mathns "http://www.w3.org/1998/Math/MathML">]>'
169: .'<html xmlns:math="http://www.w3.org/1998/Math/MathML" '
170: .'xmlns="http://www.w3.org/TR/REC-html40">';
171: } else {
172: $output='<html>';
173: }
174: return $output;
175: }
176:
177: sub xmlend {
178: my ($discussiononly,$symb)=@_;
179: my $discussion='';
180: if ($ENV{'request.course.id'}) {
181: my $crs='/'.$ENV{'request.course.id'};
182: if ($ENV{'request.course.sec'}) {
183: $crs.='_'.$ENV{'request.course.sec'};
184: }
185: $crs=~s/\_/\//g;
186: my $seeid=&Apache::lonnet::allowed('rin',$crs);
187: my $viewgrades=&Apache::lonnet::allowed('vgr',$crs);
188: unless ($symb) {
189: $symb=&Apache::lonnet::symbread();
190: }
191: if ($symb) {
192: my %contrib=&Apache::lonnet::restore($symb,$ENV{'request.course.id'},
193: $ENV{'course.'.$ENV{'request.course.id'}.'.domain'},
194: $ENV{'course.'.$ENV{'request.course.id'}.'.num'});
195: if ($contrib{'version'}) {
196: unless ($discussiononly) {
197: $discussion.=
198: '<address><hr />';
199: }
200: my $idx;
201: for ($idx=1;$idx<=$contrib{'version'};$idx++) {
202: my $hidden=($contrib{'hidden'}=~/\.$idx\./);
203: my $deleted=($contrib{'deleted'}=~/\.$idx\./);
204: unless ((($hidden) && (!$seeid)) || ($deleted)) {
205: my $message=$contrib{$idx.':message'};
206: $message=~s/\n/\<br \/\>/g;
207: $message=&Apache::lontexconvert::msgtexconverted($message);
208: if ($contrib{$idx.':attachmenturl'}) {
209: my ($fname,$ft)
210: =($contrib{$idx.':attachmenturl'}=~/\/(\w+)\.(\w+)$/);
211: $message.='<p>Attachment: <a href="'.
212: &Apache::lonnet::tokenwrapper($contrib{$idx.':attachmenturl'}).
213: '"><tt>'.$fname.'.'.$ft.'</tt></a>';
214: }
215: if ($message) {
216: if ($hidden) {
217: $message='<font color="#888888">'.$message.'</font>';
218: }
219: my $screenname=&Apache::loncommon::screenname(
220: $contrib{$idx.':sendername'},
221: $contrib{$idx.':senderdomain'});
222: my $plainname=&Apache::loncommon::nickname(
223: $contrib{$idx.':sendername'},
224: $contrib{$idx.':senderdomain'});
225:
226: my $sender='Anonymous';
227: if ((!$contrib{$idx.':anonymous'}) || ($seeid)) {
228: $sender=&Apache::loncommon::aboutmewrapper(
229: $plainname,
230: $contrib{$idx.':sendername'},
231: $contrib{$idx.':senderdomain'}).' ('.
232: $contrib{$idx.':sendername'}.' at '.
233: $contrib{$idx.':senderdomain'}.')';
234: if ($contrib{$idx.':anonymous'}) {
235: $sender.=' [anonymous] '.
236: $screenname;
237: }
238: if ($seeid) {
239: if ($hidden) {
240: $sender.=' <a href="/adm/feedback?unhide='.
241: $symb.':::'.$idx.'">Make Visible</a>';
242: } else {
243: $sender.=' <a href="/adm/feedback?hide='.
244: $symb.':::'.$idx.'">Hide</a>';
245: }
246: $sender.=' <a href="/adm/feedback?deldisc='.
247: $symb.':::'.$idx.'">Delete</a>';
248: }
249: } else {
250: if ($screenname) {
251: $sender='<i>'.$screenname.'</i>';
252: }
253: }
254: my $vgrlink;
255: if ($viewgrades) {
256: $vgrlink=&Apache::loncommon::submlink('Submissions',$contrib{$idx.':sendername'},$contrib{$idx.':senderdomain'},$symb);
257: }
258: $discussion.='<p><b>'.$sender.'</b> '.$vgrlink.' ('.
259: localtime($contrib{$idx.':timestamp'}).
260: '):<blockquote>'.$message.
261: '</blockquote></p>';
262: }
263: }
264: }
265: unless ($discussiononly) {
266: $discussion.='</address>';
267: }
268: }
269: if ($discussiononly) {
270: $discussion.=(<<ENDDISCUSS);
271: <form action="/adm/feedback" method="post" name="mailform" enctype="multipart/form-data">
272: <input type="submit" name="discuss" value="Post Discussion" />
273: <input type="submit" name="anondiscuss" value="Post Anonymous Discussion" />
274: <input type="hidden" name="symb" value="$symb" />
275: <input type="hidden" name="sendit" value="true" />
276: <br />
277: <font size="1">Note: in anonymous discussion, your name is visible only to
278: course faculty</font><br />
279: <textarea name=comment cols=60 rows=10 wrap=hard></textarea>
280: <p>
281: Attachment (128 KB max size): <input type="file" name="attachment" />
282: </p>
283: </form>
284: ENDDISCUSS
285: $discussion.=&Apache::lonfeedback::generate_preview_button();
286: }
287: }
288: }
289: return $discussion.($discussiononly?'':'</html>');
290: }
291:
292: sub tokeninputfield {
293: my $defhost=$Apache::lonnet::perlvar{'lonHostID'};
294: $defhost=~tr/a-z/A-Z/;
295: return (<<ENDINPUTFIELD)
296: <script type="text/javascript">
297: function updatetoken() {
298: var comp=new Array;
299: var barcode=unescape(document.tokeninput.barcode.value);
300: comp=barcode.split('*');
301: if (typeof(comp[0])!="undefined") {
302: document.tokeninput.codeone.value=comp[0];
303: }
304: if (typeof(comp[1])!="undefined") {
305: document.tokeninput.codetwo.value=comp[1];
306: }
307: if (typeof(comp[2])!="undefined") {
308: comp[2]=comp[2].toUpperCase();
309: document.tokeninput.codethree.value=comp[2];
310: }
311: document.tokeninput.barcode.value='';
312: }
313: </script>
314: <form method="post" name="tokeninput">
315: <table border="2" bgcolor="#FFFFBB">
316: <tr><th>DocID Checkin</th></tr>
317: <tr><td>
318: <table>
319: <tr>
320: <td>Scan in Barcode</td>
321: <td><input type="text" size="22" name="barcode"
322: onChange="updatetoken()"/></td>
323: </tr>
324: <tr><td><i>or</i> Type in DocID</td>
325: <td>
326: <input type="text" size="5" name="codeone" />
327: <b><font size="+2">*</font></b>
328: <input type="text" size="5" name="codetwo" />
329: <b><font size="+2">*</font></b>
330: <input type="text" size="10" name="codethree" value="$defhost"
331: onChange="this.value=this.value.toUpperCase()" />
332: </td></tr>
333: </table>
334: </td></tr>
335: <tr><td><input type="submit" value="Check in DocID" /></td></tr>
336: </table>
337: </form>
338: ENDINPUTFIELD
339: }
340:
341: sub maketoken {
342: my ($symb,$tuname,$tudom,$tcrsid)=@_;
343: unless ($symb) {
344: $symb=&Apache::lonnet::symbread();
345: }
346: unless ($tuname) {
347: $tuname=$ENV{'user.name'};
348: $tudom=$ENV{'user.domain'};
349: $tcrsid=$ENV{'request.course.id'};
350: }
351:
352: return &Apache::lonnet::checkout($symb,$tuname,$tudom,$tcrsid);
353: }
354:
355: sub printtokenheader {
356: my ($target,$token,$tsymb,$tcrsid,$tudom,$tuname)=@_;
357: unless ($token) { return ''; }
358:
359: my ($symb,$courseid,$domain,$name) = &Apache::lonxml::whichuser();
360: unless ($tsymb) {
361: $tsymb=$symb;
362: }
363: unless ($tuname) {
364: $tuname=$name;
365: $tudom=$domain;
366: $tcrsid=$courseid;
367: }
368:
369: my %reply=&Apache::lonnet::get('environment',
370: ['firstname','middlename','lastname','generation'],
371: $tudom,$tuname);
372: my $plainname=$reply{'firstname'}.' '.
373: $reply{'middlename'}.' '.
374: $reply{'lastname'}.' '.
375: $reply{'generation'};
376:
377: if ($target eq 'web') {
378: my %idhash=&Apache::lonnet::idrget($tudom,($tuname));
379: return
380: '<img align="right" src="/cgi-bin/barcode.png?encode='.$token.'" />'.
381: 'Checked out for '.$plainname.
382: '<br />User: '.$tuname.' at '.$tudom.
383: '<br />ID: '.$idhash{$tuname}.
384: '<br />CourseID: '.$tcrsid.
385: '<br />Course: '.$ENV{'course.'.$tcrsid.'.description'}.
386: '<br />DocID: '.$token.
387: '<br />Time: '.localtime().'<hr />';
388: } else {
389: return $token;
390: }
391: }
392:
393: sub fontsettings() {
394: my $headerstring='';
395: if (($ENV{'browser.os'} eq 'mac') && (!$ENV{'browser.mathml'})) {
396: $headerstring.=
397: '<meta Content-Type="text/html; charset=x-mac-roman">';
398: } elsif (!$ENV{'browser.mathml'} && $ENV{'browser.unicode'}) {
399: $headerstring.=
400: '<meta http-equiv="Content-Type" content="text/html; charset=utf-8" />';
401: }
402: return $headerstring;
403: }
404:
405: sub printalltags {
406: my $temp;
407: foreach $temp (sort keys %Apache::lonxml::alltags) {
408: &Apache::lonxml::debug("$temp -- ".
409: join(',',@{ $Apache::lonxml::alltags{$temp} }));
410: }
411: }
412:
413: sub xmlparse {
414: my ($request,$target,$content_file_string,$safeinit,%style_for_target) = @_;
415:
416: &setup_globals($request,$target);
417: &Apache::inputtags::initialize_inputtags();
418: &Apache::outputtags::initialize_outputtags();
419: &Apache::edit::initialize_edit();
420:
421: #
422: # do we have a course style file?
423: #
424:
425: if ($ENV{'request.course.id'} && $ENV{'request.state'} ne 'construct') {
426: my $bodytext=
427: $ENV{'course.'.$ENV{'request.course.id'}.'.default_xml_style'};
428: if ($bodytext) {
429: my $location=&Apache::lonnet::filelocation('',$bodytext);
430: my $styletext=&Apache::lonnet::getfile($location);
431: if ($styletext ne '-1') {
432: %style_for_target = (%style_for_target,
433: &Apache::style::styleparser($target,$styletext));
434: }
435: }
436: }
437: #&printalltags();
438: my @pars = ();
439: my $pwd=$ENV{'request.filename'};
440: $pwd =~ s:/[^/]*$::;
441: &newparser(\@pars,\$content_file_string,$pwd);
442:
443: my $safeeval = new Safe;
444: my $safehole = new Safe::Hole;
445: &init_safespace($target,$safeeval,$safehole,$safeinit);
446: #-------------------- Redefinition of the target in the case of compound target
447:
448: ($target, my @tenta) = split('&&',$target);
449:
450: my @stack = ();
451: my @parstack = ();
452: &initdepth;
453:
454: my $finaloutput = &inner_xmlparse($target,\@stack,\@parstack,\@pars,
455: $safeeval,\%style_for_target);
456:
457: if ($ENV{'request.uri'}) {
458: &writeallows($ENV{'request.uri'});
459: }
460: if ($Apache::lonxml::counter_changed) { &store_counter() }
461: return $finaloutput;
462: }
463:
464: sub htmlclean {
465: my ($raw,$full)=@_;
466:
467: my $tree = HTML::TreeBuilder->new;
468: $tree->ignore_unknown(0);
469:
470: $tree->parse($raw);
471:
472: my $output= $tree->as_HTML(undef,' ');
473:
474: $output=~s/\<(br|hr|img|meta|allow)(.*?)\>/\<$1$2 \/\>/gis;
475: $output=~s/\<\/(br|hr|img|meta|allow)\>//gis;
476: unless ($full) {
477: $output=~s/\<[\/]*(body|head|html)\>//gis;
478: }
479:
480: $tree = $tree->delete;
481:
482: return $output;
483: }
484:
485: sub latex_special_symbols {
486: my ($string,$where)=@_;
487: if ($where eq 'header') {
488: $string =~ s/(\\|_|\^)/ /g;
489: $string =~ s/(\$|%|\#|&|\{|\})/\\$1/g;
490: $string =~ s/_/ /g;
491: } else {
492: $string=~s/\\ /\\char92 /g;
493: $string=~s/\^/\\char94 /g;
494: $string=~s/\~/\\char126 /g;
495: $string=~s/(&[^A-Za-z\#])/\\$1/g;
496: $string=~s/([^&])\#/$1\\#/g;
497: $string=~s/(\$|_|{|})/\\$1/g;
498: $string=~s/\\char92 /\\texttt{\\char92}/g;
499: $string=~s/(>|<)/\$$1\$/g; #more or less
500: if ($string=~m/\d%/) {$string =~ s/(\d)%/$1\\%/g;} #percent after digit
501: if ($string=~m/\s%/) {$string =~ s/(\s)%/$1\\%/g;} #percent after space
502: if ($string eq '%.') {$string = '\%.';} #percent at the end of statement
503: }
504: return $string;
505: }
506:
507: sub inner_xmlparse {
508: my ($target,$stack,$parstack,$pars,$safeeval,$style_for_target)=@_;
509: my $finaloutput = '';
510: my $result;
511: my $token;
512: my $dontpop=0;
513: while ( $#$pars > -1 ) {
514: while ($token = $$pars['-1']->get_token) {
515: if (($token->[0] eq 'T') || ($token->[0] eq 'C') ) {
516: if ($metamode<1) {
517: my $text=$token->[1];
518: if ($token->[0] eq 'C' && $target eq 'tex') {
519: $text = '';
520: # $text = '%'.$text."\n";
521: }
522: $result.=$text;
523: }
524: } elsif (($token->[0] eq 'D')) {
525: if ($metamode<1 && $target eq 'web') {
526: my $text=$token->[1];
527: $result.=$text;
528: }
529: } elsif ($token->[0] eq 'PI') {
530: if ($metamode<1 && $target eq 'web') {
531: $result=$token->[2];
532: }
533: } elsif ($token->[0] eq 'S') {
534: # add tag to stack
535: push (@$stack,$token->[1]);
536: # add parameters list to another stack
537: push (@$parstack,&parstring($token));
538: &increasedepth($token);
539: if ($Apache::lonxml::usestyle &&
540: exists($$style_for_target{$token->[1]})) {
541: $Apache::lonxml::usestyle=0;
542: my $string=$$style_for_target{$token->[1]}.
543: '<LONCAPA_INTERNAL_TURN_STYLE_ON />';
544: &Apache::lonxml::newparser($pars,\$string);
545: $Apache::lonxml::style_values=$$parstack[-1];
546: $Apache::lonxml::style_end_values=$$parstack[-1];
547: } else {
548: $result = &callsub("start_$token->[1]", $target, $token, $stack,
549: $parstack, $pars, $safeeval, $style_for_target);
550: }
551: } elsif ($token->[0] eq 'E') {
552: if ($Apache::lonxml::usestyle &&
553: exists($$style_for_target{'/'."$token->[1]"})) {
554: $Apache::lonxml::usestyle=0;
555: my $string=$$style_for_target{'/'.$token->[1]}.
556: '<LONCAPA_INTERNAL_TURN_STYLE_ON end="'.$token->[1].'" />';
557: &Apache::lonxml::newparser($pars,\$string);
558: $Apache::lonxml::style_values=$Apache::lonxml::style_end_values;
559: $Apache::lonxml::style_end_values='';
560: $dontpop=1;
561: } else {
562: #clear out any tags that didn't end
563: while ($token->[1] ne $$stack['-1'] && ($#$stack > -1)) {
564: my $lasttag=$$stack[-1];
565: if ($token->[1] =~ /^$lasttag$/i) {
566: &Apache::lonxml::warning('Using tag </'.$token->[1].'> on line '.$token->[3].' as end tag to <'.$$stack[-1].'>');
567: last;
568: } else {
569: &Apache::lonxml::warning('Found tag </'.$token->[1].'> on line '.$token->[3].' when looking for </'.$$stack[-1].'> in file');
570: &end_tag($stack,$parstack,$token);
571: }
572: }
573: $result = &callsub("end_$token->[1]", $target, $token, $stack,
574: $parstack, $pars,$safeeval, $style_for_target);
575: }
576: } else {
577: &Apache::lonxml::error("Unknown token event :$token->[0]:$token->[1]:");
578: }
579: #evaluate variable refs in result
580: if ($result ne "") {
581: my $extras;
582: if (!$Apache::lonxml::usestyle) {
583: $extras=$Apache::lonxml::style_values;
584: }
585: if ( $#$parstack > -1 ) {
586: $result=&Apache::run::evaluate($result,$safeeval,$extras.$$parstack[-1]);
587: } else {
588: $result= &Apache::run::evaluate($result,$safeeval,$extras);
589: }
590: }
591: if (($token->[0] eq 'T') || ($token->[0] eq 'C') || ($token->[0] eq 'D') ) {
592: #Style file definitions should be correct
593: if ($target eq 'tex' && ($Apache::lonxml::usestyle)) {
594: $result=&latex_special_symbols($result);
595: }
596: }
597:
598: # Encode any high ASCII characters
599: if (!$Apache::lonxml::prevent_entity_encode) {
600: $result=&HTML::Entities::encode($result,"\200-\377");
601: }
602: if ($Apache::lonxml::redirection) {
603: $Apache::lonxml::outputstack['-1'] .= $result;
604: } else {
605: $finaloutput.=$result;
606: }
607: $result = '';
608:
609: if ($token->[0] eq 'E' && !$dontpop) {
610: &end_tag($stack,$parstack,$token);
611: }
612: $dontpop=0;
613: }
614: if ($#$pars > -1) {
615: pop @$pars;
616: pop @Apache::lonxml::pwd;
617: }
618: }
619:
620: # if ($target eq 'meta') {
621: # $finaloutput.=&endredirection;
622: # }
623:
624:
625: if (($ENV{'QUERY_STRING'}) && ($target eq 'web')) {
626: $finaloutput=&afterburn($finaloutput);
627: }
628: return $finaloutput;
629: }
630:
631: sub callsub {
632: my ($sub,$target,$token,$tagstack,$parstack,$parser,$safeeval,$style)=@_;
633: my $currentstring='';
634: my $nodefault;
635: {
636: my $sub1;
637: no strict 'refs';
638: my $tag=$token->[1];
639: # get utterly rid of extended html tags
640: if ($tag=~/^x\-/i) { return ''; }
641: my $space=$Apache::lonxml::alltags{$tag}[-1];
642: if (!$space) {
643: $tag=~tr/A-Z/a-z/;
644: $sub=~tr/A-Z/a-z/;
645: $space=$Apache::lonxml::alltags{$tag}[-1]
646: }
647:
648: my $deleted=0;
649: $Apache::lonxml::curdepth=join('_',@Apache::lonxml::depthcounter);
650: if (($token->[0] eq 'S') && ($target eq 'modified')) {
651: $deleted=&Apache::edit::handle_delete($space,$target,$token,$tagstack,
652: $parstack,$parser,$safeeval,
653: $style);
654: }
655: if (!$deleted) {
656: if ($space) {
657: #&Apache::lonxml::debug("Calling sub $sub in $space $metamode");
658: $sub1="$space\:\:$sub";
659: ($currentstring,$nodefault) = &$sub1($target,$token,$tagstack,
660: $parstack,$parser,$safeeval,
661: $style);
662: } else {
663: #&Apache::lonxml::debug("NOT Calling sub $sub in $space $metamode");
664: if ($metamode <1) {
665: if (defined($token->[4]) && ($metamode < 1)) {
666: $currentstring = $token->[4];
667: } else {
668: $currentstring = $token->[2];
669: }
670: }
671: }
672: # &Apache::lonxml::debug("nodefalt:$nodefault:");
673: if ($currentstring eq '' && $nodefault eq '') {
674: if ($target eq 'edit') {
675: #&Apache::lonxml::debug("doing default edit for $token->[1]");
676: if ($token->[0] eq 'S') {
677: $currentstring = &Apache::edit::tag_start($target,$token);
678: } elsif ($token->[0] eq 'E') {
679: $currentstring = &Apache::edit::tag_end($target,$token);
680: }
681: } elsif ($target eq 'modified') {
682: if ($token->[0] eq 'S') {
683: $currentstring = $token->[4];
684: $currentstring.=&Apache::edit::handle_insert();
685: } elsif ($token->[0] eq 'E') {
686: $currentstring = $token->[2];
687: $currentstring.=&Apache::edit::handle_insertafter($token->[1]);
688: } else {
689: $currentstring = $token->[2];
690: }
691: }
692: }
693: }
694: use strict 'refs';
695: }
696: return $currentstring;
697: }
698:
699: sub setup_globals {
700: my ($request,$target)=@_;
701: $Apache::lonxml::request=$request;
702: $Apache::lonxml::registered = 0;
703: $errorcount=0;
704: $warningcount=0;
705: $Apache::lonxml::default_homework_loaded=0;
706: $Apache::lonxml::usestyle=1;
707: &init_counter();
708: @Apache::lonxml::pwd=();
709: @Apache::lonxml::extlinks=();
710: if ($target eq 'meta') {
711: $Apache::lonxml::redirection = 0;
712: $Apache::lonxml::metamode = 1;
713: $Apache::lonxml::evaluate = 1;
714: $Apache::lonxml::import = 0;
715: } elsif ($target eq 'answer') {
716: $Apache::lonxml::redirection = 0;
717: $Apache::lonxml::metamode = 1;
718: $Apache::lonxml::evaluate = 1;
719: $Apache::lonxml::import = 1;
720: } elsif ($target eq 'grade') {
721: &startredirection;
722: $Apache::lonxml::metamode = 0;
723: $Apache::lonxml::evaluate = 1;
724: $Apache::lonxml::import = 1;
725: } elsif ($target eq 'modified') {
726: $Apache::lonxml::redirection = 0;
727: $Apache::lonxml::metamode = 0;
728: $Apache::lonxml::evaluate = 0;
729: $Apache::lonxml::import = 0;
730: } elsif ($target eq 'edit') {
731: $Apache::lonxml::redirection = 0;
732: $Apache::lonxml::metamode = 0;
733: $Apache::lonxml::evaluate = 0;
734: $Apache::lonxml::import = 0;
735: } elsif ($target eq 'analyze') {
736: $Apache::lonxml::redirection = 0;
737: $Apache::lonxml::metamode = 0;
738: $Apache::lonxml::evaluate = 1;
739: $Apache::lonxml::import = 1;
740: } else {
741: $Apache::lonxml::redirection = 0;
742: $Apache::lonxml::metamode = 0;
743: $Apache::lonxml::evaluate = 1;
744: $Apache::lonxml::import = 1;
745: }
746: }
747:
748: sub init_safespace {
749: my ($target,$safeeval,$safehole,$safeinit) = @_;
750: $safeeval->permit("entereval");
751: $safeeval->permit(":base_math");
752: $safeeval->permit("sort");
753: $safeeval->deny(":base_io");
754: $safehole->wrap(\&Apache::scripttag::xmlparse,$safeeval,'&xmlparse');
755: $safehole->wrap(\&Apache::outputtags::multipart,$safeeval,'&multipart');
756: $safehole->wrap(\&Apache::lonnet::EXT,$safeeval,'&EXT');
757:
758: $safehole->wrap(\&Math::Cephes::asin,$safeeval,'&asin');
759: $safehole->wrap(\&Math::Cephes::acos,$safeeval,'&acos');
760: $safehole->wrap(\&Math::Cephes::atan,$safeeval,'&atan');
761: $safehole->wrap(\&Math::Cephes::sinh,$safeeval,'&sinh');
762: $safehole->wrap(\&Math::Cephes::cosh,$safeeval,'&cosh');
763: $safehole->wrap(\&Math::Cephes::tanh,$safeeval,'&tanh');
764: $safehole->wrap(\&Math::Cephes::asinh,$safeeval,'&asinh');
765: $safehole->wrap(\&Math::Cephes::acosh,$safeeval,'&acosh');
766: $safehole->wrap(\&Math::Cephes::atanh,$safeeval,'&atanh');
767: $safehole->wrap(\&Math::Cephes::erf,$safeeval,'&erf');
768: $safehole->wrap(\&Math::Cephes::erfc,$safeeval,'&erfc');
769: $safehole->wrap(\&Math::Cephes::j0,$safeeval,'&j0');
770: $safehole->wrap(\&Math::Cephes::j1,$safeeval,'&j1');
771: $safehole->wrap(\&Math::Cephes::jn,$safeeval,'&jn');
772: $safehole->wrap(\&Math::Cephes::jv,$safeeval,'&jv');
773: $safehole->wrap(\&Math::Cephes::y0,$safeeval,'&y0');
774: $safehole->wrap(\&Math::Cephes::y1,$safeeval,'&y1');
775: $safehole->wrap(\&Math::Cephes::yn,$safeeval,'&yn');
776: $safehole->wrap(\&Math::Cephes::yv,$safeeval,'&yv');
777:
778: $safehole->wrap(\&Math::Cephes::bdtr ,$safeeval,'&bdtr' );
779: $safehole->wrap(\&Math::Cephes::bdtrc ,$safeeval,'&bdtrc' );
780: $safehole->wrap(\&Math::Cephes::bdtri ,$safeeval,'&bdtri' );
781: $safehole->wrap(\&Math::Cephes::btdtr ,$safeeval,'&btdtr' );
782: $safehole->wrap(\&Math::Cephes::chdtr ,$safeeval,'&chdtr' );
783: $safehole->wrap(\&Math::Cephes::chdtrc,$safeeval,'&chdtrc');
784: $safehole->wrap(\&Math::Cephes::chdtri,$safeeval,'&chdtri');
785: $safehole->wrap(\&Math::Cephes::fdtr ,$safeeval,'&fdtr' );
786: $safehole->wrap(\&Math::Cephes::fdtrc ,$safeeval,'&fdtrc' );
787: $safehole->wrap(\&Math::Cephes::fdtri ,$safeeval,'&fdtri' );
788: $safehole->wrap(\&Math::Cephes::gdtr ,$safeeval,'&gdtr' );
789: $safehole->wrap(\&Math::Cephes::gdtrc ,$safeeval,'&gdtrc' );
790: $safehole->wrap(\&Math::Cephes::nbdtr ,$safeeval,'&nbdtr' );
791: $safehole->wrap(\&Math::Cephes::nbdtrc,$safeeval,'&nbdtrc');
792: $safehole->wrap(\&Math::Cephes::nbdtri,$safeeval,'&nbdtri');
793: $safehole->wrap(\&Math::Cephes::ndtr ,$safeeval,'&ndtr' );
794: $safehole->wrap(\&Math::Cephes::ndtri ,$safeeval,'&ndtri' );
795: $safehole->wrap(\&Math::Cephes::pdtr ,$safeeval,'&pdtr' );
796: $safehole->wrap(\&Math::Cephes::pdtrc ,$safeeval,'&pdtrc' );
797: $safehole->wrap(\&Math::Cephes::pdtri ,$safeeval,'&pdtri' );
798: $safehole->wrap(\&Math::Cephes::stdtr ,$safeeval,'&stdtr' );
799: $safehole->wrap(\&Math::Cephes::stdtri,$safeeval,'&stdtri');
800:
801: # $safehole->wrap(\&Math::Cephes::new_fract,$safeeval,'&new_fract');
802: # $safehole->wrap(\&Math::Cephes::radd,$safeeval,'&radd');
803: # $safehole->wrap(\&Math::Cephes::rsub,$safeeval,'&rsub');
804: # $safehole->wrap(\&Math::Cephes::rmul,$safeeval,'&rmul');
805: # $safehole->wrap(\&Math::Cephes::rdiv,$safeeval,'&rdiv');
806: # $safehole->wrap(\&Math::Cephes::euclid,$safeeval,'&euclid');
807:
808: $safehole->wrap(\&Math::Random::random_beta,$safeeval,'&math_random_beta');
809: $safehole->wrap(\&Math::Random::random_chi_square,$safeeval,'&math_random_chi_square');
810: $safehole->wrap(\&Math::Random::random_exponential,$safeeval,'&math_random_exponential');
811: $safehole->wrap(\&Math::Random::random_f,$safeeval,'&math_random_f');
812: $safehole->wrap(\&Math::Random::random_gamma,$safeeval,'&math_random_gamma');
813: $safehole->wrap(\&Math::Random::random_multivariate_normal,$safeeval,'&math_random_multivariate_normal');
814: $safehole->wrap(\&Math::Random::random_multinomial,$safeeval,'&math_random_multinomial');
815: $safehole->wrap(\&Math::Random::random_noncentral_chi_square,$safeeval,'&math_random_noncentral_chi_square');
816: $safehole->wrap(\&Math::Random::random_noncentral_f,$safeeval,'&math_random_noncentral_f');
817: $safehole->wrap(\&Math::Random::random_normal,$safeeval,'&math_random_normal');
818: $safehole->wrap(\&Math::Random::random_permutation,$safeeval,'&math_random_permutation');
819: $safehole->wrap(\&Math::Random::random_permuted_index,$safeeval,'&math_random_permuted_index');
820: $safehole->wrap(\&Math::Random::random_uniform,$safeeval,'&math_random_uniform');
821: $safehole->wrap(\&Math::Random::random_poisson,$safeeval,'&math_random_poisson');
822: $safehole->wrap(\&Math::Random::random_uniform_integer,$safeeval,'&math_random_uniform_integer');
823: $safehole->wrap(\&Math::Random::random_negative_binomial,$safeeval,'&math_random_negative_binomial');
824: $safehole->wrap(\&Math::Random::random_binomial,$safeeval,'&math_random_binomial');
825: $safehole->wrap(\&Math::Random::random_seed_from_phrase,$safeeval,'&random_seed_from_phrase');
826: $safehole->wrap(\&Math::Random::random_set_seed_from_phrase,$safeeval,'&random_set_seed_from_phrase');
827: $safehole->wrap(\&Math::Random::random_get_seed,$safeeval,'&random_get_seed');
828: $safehole->wrap(\&Math::Random::random_set_seed,$safeeval,'&random_set_seed');
829:
830: #need to inspect this class of ops
831: # $safeeval->deny(":base_orig");
832: $safeinit .= ';$external::target="'.$target.'";';
833: my $rndseed;
834: my ($symb,$courseid,$domain,$name) = &Apache::lonxml::whichuser();
835: $rndseed=&Apache::lonnet::rndseed($symb,$courseid,$domain,$name);
836: $safeinit .= ';$external::randomseed='.$rndseed.';';
837: &Apache::lonxml::debug("Setting rndseed to $rndseed");
838: &Apache::run::run($safeinit,$safeeval);
839: }
840:
841: sub default_homework_load {
842: my ($safeeval)=@_;
843: &Apache::lonxml::debug('Loading default_homework');
844: my $default=&Apache::lonnet::getfile('/home/httpd/html/res/adm/includes/default_homework.lcpm');
845: if ($default eq -1) {
846: &Apache::lonxml::error("<b>Unable to find <i>default_homework.lcpm</i></b>");
847: } else {
848: &Apache::run::run($default,$safeeval);
849: $Apache::lonxml::default_homework_loaded=1;
850: }
851: }
852:
853: sub startredirection {
854: $Apache::lonxml::redirection++;
855: push (@Apache::lonxml::outputstack, '');
856: }
857:
858: sub endredirection {
859: if (!$Apache::lonxml::redirection) {
860: &Apache::lonxml::error("Endredirection was called, before a startredirection, perhaps you have unbalanced tags. Some debuging information:".join ":",caller);
861: return '';
862: }
863: $Apache::lonxml::redirection--;
864: pop @Apache::lonxml::outputstack;
865: }
866:
867: sub end_tag {
868: my ($tagstack,$parstack,$token)=@_;
869: pop(@$tagstack);
870: pop(@$parstack);
871: &decreasedepth($token);
872: }
873:
874: sub initdepth {
875: @Apache::lonxml::depthcounter=();
876: $Apache::lonxml::depth=-1;
877: $Apache::lonxml::olddepth=-1;
878: }
879:
880: sub increasedepth {
881: my ($token) = @_;
882: $Apache::lonxml::depth++;
883: $Apache::lonxml::depthcounter[$Apache::lonxml::depth]++;
884: if ($Apache::lonxml::depthcounter[$Apache::lonxml::depth]==1) {
885: $Apache::lonxml::olddepth=$Apache::lonxml::depth;
886: }
887: my $curdepth=join('_',@Apache::lonxml::depthcounter);
888: &Apache::lonxml::debug("s $Apache::lonxml::depth : $Apache::lonxml::olddepth : $curdepth : $token->[1]\n");
889: #print "<br />s $Apache::lonxml::depth : $Apache::lonxml::olddepth : $curdepth : $token->[1]\n";
890: }
891:
892: sub decreasedepth {
893: my ($token) = @_;
894: $Apache::lonxml::depth--;
895: if ($Apache::lonxml::depth<$Apache::lonxml::olddepth-1) {
896: $#Apache::lonxml::depthcounter--;
897: $Apache::lonxml::olddepth=$Apache::lonxml::depth+1;
898: }
899: if ( $Apache::lonxml::depth < -1) {
900: &Apache::lonxml::warning("Missing tags, unable to properly run file.");
901: $Apache::lonxml::depth='-1';
902: }
903: my $curdepth=join('_',@Apache::lonxml::depthcounter);
904: &Apache::lonxml::debug("e $Apache::lonxml::depth : $Apache::lonxml::olddepth : $token->[1] : $curdepth\n");
905: #print "<br />e $Apache::lonxml::depth : $Apache::lonxml::olddepth : $token->[1] : $curdepth\n";
906: }
907:
908: sub get_all_text_unbalanced {
909: #there is a copy of this in lonpublisher.pm
910: my($tag,$pars)= @_;
911: my $token;
912: my $result='';
913: $tag='<'.$tag.'>';
914: while ($token = $$pars[-1]->get_token) {
915: if (($token->[0] eq 'T')||($token->[0] eq 'C')||($token->[0] eq 'D')) {
916: $result.=$token->[1];
917: } elsif ($token->[0] eq 'PI') {
918: $result.=$token->[2];
919: } elsif ($token->[0] eq 'S') {
920: $result.=$token->[4];
921: } elsif ($token->[0] eq 'E') {
922: $result.=$token->[2];
923: }
924: if ($result =~ /(.*)\Q$tag\E(.*)/s) {
925: &Apache::lonxml::debug('Got a winner with leftovers ::'.$2);
926: &Apache::lonxml::debug('Result is :'.$1);
927: $result=$1;
928: my $redo=$tag.$2;
929: &Apache::lonxml::newparser($pars,\$redo);
930: last;
931: }
932: }
933: return $result
934: }
935:
936: sub increment_counter {
937: my ($increment) = @_;
938: if (defined($increment) && $increment gt 0) {
939: $Apache::lonxml::counter+=$increment;
940: } else {
941: $Apache::lonxml::counter++;
942: }
943: $Apache::lonxml::counter_changed=1;
944: }
945:
946: sub init_counter {
947: if (defined($ENV{'form.counter'})) {
948: $Apache::lonxml::counter=$ENV{'form.counter'};
949: $Apache::lonxml::counter_changed=0;
950: } else {
951: $Apache::lonxml::counter=1;
952: $Apache::lonxml::counter_changed=1;
953: }
954: }
955:
956: sub store_counter {
957: &Apache::lonnet::appenv(('form.counter' => $Apache::lonxml::counter));
958: return '';
959: }
960:
961: sub get_all_text {
962: my($tag,$pars,$style)= @_;
963: &Apache::lonxml::debug("Got a ".ref($pars));
964: my $gotfullstack=1;
965: if (ref($pars) ne 'ARRAY') {
966: $gotfullstack=0;
967: $pars=[$pars];
968: }
969: &Apache::lonxml::debug("Got a ".ref($style));
970: if (ref($style) ne 'HASH') {
971: $style={};
972: } else {
973: &Apache::lonhomework::showhash(%$style);
974: }
975: my $depth=0;
976: my $token;
977: my $result='';
978: if ( $tag =~ m:^/: ) {
979: my $tag=substr($tag,1);
980: #&Apache::lonxml::debug("have:$tag:");
981: my $top_empty=0;
982: while (($depth >=0) && ($#$pars > -1) && (!$top_empty)) {
983: while (($depth >=0) && ($token = $$pars[-1]->get_token)) {
984: #&Apache::lonxml::debug("e token:$token->[0]:$depth:$token->[1]:".$#$pars.":".$#Apache::lonxml::pwd);
985: if (($token->[0] eq 'T')||($token->[0] eq 'C')||($token->[0] eq 'D')) {
986: $result.=$token->[1];
987: } elsif ($token->[0] eq 'PI') {
988: $result.=$token->[2];
989: } elsif ($token->[0] eq 'S') {
990: if ($token->[1] =~ /^$tag$/i) { $depth++; }
991: if ($token->[1] =~ /^LONCAPA_INTERNAL_TURN_STYLE_ON$/i) { $Apache::lonxml::usestyle=1; }
992: if ($token->[1] =~ /^LONCAPA_INTERNAL_TURN_STYLE_OFF$/i) { $Apache::lonxml::usestyle=0; }
993: $result.=$token->[4];
994: } elsif ($token->[0] eq 'E') {
995: if ( $token->[1] =~ /^$tag$/i) { $depth--; }
996: #skip sending back the last end tag
997: if ($depth == 0 && exists($$style{'/'.$token->[1]})) {
998: my $string=
999: '<LONCAPA_INTERNAL_TURN_STYLE_OFF end="yes" />'.
1000: $$style{'/'.$token->[1]}.
1001: $token->[2].
1002: '<LONCAPA_INTERNAL_TURN_STYLE_ON />';
1003: &Apache::lonxml::newparser($pars,\$string);
1004: #&Apache::lonxml::debug("reParsing $string");
1005: next;
1006: }
1007: if ($depth > -1) {
1008: $result.=$token->[2];
1009: } else {
1010: $$pars[-1]->unget_token($token);
1011: }
1012: }
1013: }
1014: if (($depth >=0) && ($#$pars == 0) ) { $top_empty=1; }
1015: if (($depth >=0) && ($#$pars > 0) ) {
1016: pop(@$pars);
1017: pop(@Apache::lonxml::pwd);
1018: }
1019: }
1020: if ($top_empty && $depth >= 0) {
1021: #never found the end tag ran out of text, throw error send back blank
1022: &error('Never found end tag for <'.$tag.
1023: '> current string <pre>'.
1024: &HTML::Entities::encode($result).
1025: '</pre>');
1026: if ($gotfullstack) {
1027: my $newstring='</'.$tag.'>'.$result;
1028: &Apache::lonxml::newparser($pars,\$newstring);
1029: }
1030: $result='';
1031: }
1032: } else {
1033: while ($#$pars > -1) {
1034: while ($token = $$pars[-1]->get_token) {
1035: #&Apache::lonxml::debug("s token:$token->[0]:$depth:$token->[1]");
1036: if (($token->[0] eq 'T')||($token->[0] eq 'C')||
1037: ($token->[0] eq 'D')) {
1038: $result.=$token->[1];
1039: } elsif ($token->[0] eq 'PI') {
1040: $result.=$token->[2];
1041: } elsif ($token->[0] eq 'S') {
1042: if ( $token->[1] =~ /^$tag$/i) {
1043: $$pars[-1]->unget_token($token); last;
1044: } else {
1045: $result.=$token->[4];
1046: }
1047: if ($token->[1] =~ /^LONCAPA_INTERNAL_TURN_STYLE_ON$/i) { $Apache::lonxml::usestyle=1; }
1048: if ($token->[1] =~ /^LONCAPA_INTERNAL_TURN_STYLE_OFF$/i) { $Apache::lonxml::usestyle=0; }
1049: } elsif ($token->[0] eq 'E') {
1050: $result.=$token->[2];
1051: }
1052: }
1053: if (($#$pars > 0) ) {
1054: pop(@$pars);
1055: pop(@Apache::lonxml::pwd);
1056: } else { last; }
1057: }
1058: }
1059: #&Apache::lonxml::debug("Exit:$result:");
1060: return $result
1061: }
1062:
1063: sub newparser {
1064: my ($parser,$contentref,$dir) = @_;
1065: push (@$parser,HTML::LCParser->new($contentref));
1066: $$parser['-1']->xml_mode('1');
1067: if ( $dir eq '' ) {
1068: push (@Apache::lonxml::pwd, $Apache::lonxml::pwd[$#Apache::lonxml::pwd]);
1069: } else {
1070: push (@Apache::lonxml::pwd, $dir);
1071: }
1072: }
1073:
1074: sub parstring {
1075: my ($token) = @_;
1076: my $temp='';
1077: foreach (@{$token->[3]}) {
1078: unless ($_=~/\W/) {
1079: my $val=$token->[2]->{$_};
1080: $val =~ s/([\%\@\\\"\'])/\\$1/g;
1081: #if ($val =~ m/^[\%\@]/) { $val="\\".$val; }
1082: $temp .= "my \$$_=\"$val\";";
1083: }
1084: }
1085: return $temp;
1086: }
1087:
1088: sub writeallows {
1089: unless ($#extlinks>=0) { return; }
1090: my $thisurl='/res/'.&Apache::lonnet::declutter(shift);
1091: if ($ENV{'httpref.'.$thisurl}) {
1092: $thisurl=$ENV{'httpref.'.$thisurl};
1093: }
1094: my $thisdir=$thisurl;
1095: $thisdir=~s/\/[^\/]+$//;
1096: my %httpref=();
1097: foreach (@extlinks) {
1098: $httpref{'httpref.'.
1099: &Apache::lonnet::hreflocation($thisdir,$_)}=$thisurl;
1100: }
1101: @extlinks=();
1102: &Apache::lonnet::appenv(%httpref);
1103: }
1104:
1105: #
1106: # Afterburner handles anchors, highlights and links
1107: #
1108: sub afterburn {
1109: my $result=shift;
1110: &Apache::loncommon::get_unprocessed_cgi($ENV{'QUERY_STRING'},
1111: ['highlight','anchor','link']);
1112: if ($ENV{'form.highlight'}) {
1113: foreach (split(/\,/,$ENV{'form.highlight'})) {
1114: my $anchorname=$_;
1115: my $matchthis=$anchorname;
1116: $matchthis=~s/\_+/\\s\+/g;
1117: $result=~s/($matchthis)/\<font color=\"red\"\>$1\<\/font\>/gs;
1118: }
1119: }
1120: if ($ENV{'form.link'}) {
1121: foreach (split(/\,/,$ENV{'form.link'})) {
1122: my ($anchorname,$linkurl)=split(/\>/,$_);
1123: my $matchthis=$anchorname;
1124: $matchthis=~s/\_+/\\s\+/g;
1125: $result=~s/($matchthis)/\<a href=\"$linkurl\"\>$1\<\/a\>/gs;
1126: }
1127: }
1128: if ($ENV{'form.anchor'}) {
1129: my $anchorname=$ENV{'form.anchor'};
1130: my $matchthis=$anchorname;
1131: $matchthis=~s/\_+/\\s\+/g;
1132: $result=~s/($matchthis)/\<a name=\"$anchorname\"\>$1\<\/a\>/s;
1133: $result.=(<<"ENDSCRIPT");
1134: <script type="text/javascript">
1135: document.location.hash='$anchorname';
1136: </script>
1137: ENDSCRIPT
1138: }
1139: return $result;
1140: }
1141:
1142: sub storefile {
1143: my ($file,$contents)=@_;
1144: if (my $fh=Apache::File->new('>'.$file)) {
1145: print $fh $contents;
1146: $fh->close();
1147: return 1;
1148: } else {
1149: &warning("Unable to save file $file");
1150: return 0;
1151: }
1152: }
1153:
1154: sub createnewhtml {
1155: my $filecontents=(<<SIMPLECONTENT);
1156: <html>
1157: <head>
1158: <title>
1159: Title of Document Goes Here
1160: </title>
1161: </head>
1162: <body bgcolor="#FFFFFF">
1163:
1164: Body of Document Goes Here
1165:
1166: </body>
1167: </html>
1168: SIMPLECONTENT
1169: return $filecontents;
1170: }
1171:
1172: sub createnewsty {
1173: my $filecontents=(<<SIMPLECONTENT);
1174: <definetag name="">
1175: <render>
1176: <web></web>
1177: <tex></tex>
1178: </render>
1179: </definetag>
1180: SIMPLECONTENT
1181: return $filecontents;
1182: }
1183:
1184:
1185: sub inserteditinfo {
1186: my ($result,$filecontents,$filetype)=@_;
1187: $filecontents = &HTML::Entities::encode($filecontents);
1188: # my $editheader='<a href="#editsection">Edit below</a><hr />';
1189: my $xml_help = '';
1190: if ($filetype eq 'html') {
1191: $xml_help=Apache::loncommon::helpLatexCheatsheet();
1192: }
1193: my $cleanbut = '';
1194: if ($filetype eq 'html') {
1195: $cleanbut='<input type="submit" name="attemptclean"
1196: value="Save and then attempt to clean HTML" />';
1197: }
1198: my $titledisplay=&display_title();
1199: my $buttons=(<<BUTTONS);
1200: $cleanbut
1201: <input type="submit" name="savethisfile" value="Save this" />
1202: <input type="submit" name="viewmode" value="View" />
1203: BUTTONS
1204: my $editfooter=(<<ENDFOOTER);
1205: <hr />
1206: <a name="editsection" />
1207: <form method="post">
1208: $xml_help
1209: <input type="hidden" name="editmode" value="Edit" />
1210: $buttons<br />
1211: <textarea cols="80" rows="40" name="filecont">$filecontents</textarea>
1212: <br />$buttons
1213: <br />
1214: </form>
1215: $titledisplay
1216: ENDFOOTER
1217: # $result=~s/(\<body[^\>]*\>)/$1$editheader/is;
1218: $result=~s/(\<\/body\>)/$editfooter/is;
1219: return $result;
1220: }
1221:
1222: sub get_target {
1223: my $viewgrades=&Apache::lonnet::allowed('vgr',$ENV{'request.course.id'});
1224: if ( $ENV{'request.state'} eq 'published') {
1225: if ( defined($ENV{'form.grade_target'})
1226: && ($viewgrades == 'F' )) {
1227: return ($ENV{'form.grade_target'});
1228: } elsif (defined($ENV{'form.grade_target'})) {
1229: if (($ENV{'form.grade_target'} eq 'web') ||
1230: ($ENV{'form.grade_target'} eq 'tex') ) {
1231: return $ENV{'form.grade_target'}
1232: } else {
1233: return 'web';
1234: }
1235: } else {
1236: return 'web';
1237: }
1238: } elsif ($ENV{'request.state'} eq 'construct') {
1239: if ( defined($ENV{'form.grade_target'})) {
1240: return ($ENV{'form.grade_target'});
1241: } else {
1242: return 'web';
1243: }
1244: } else {
1245: return 'web';
1246: }
1247: }
1248:
1249: sub handler {
1250: my $request=shift;
1251:
1252: my $target=&get_target();
1253:
1254: $Apache::lonxml::debug=$ENV{'user.debug'};
1255:
1256: if ($ENV{'browser.mathml'}) {
1257: $request->content_type('text/xml');
1258: } else {
1259: $request->content_type('text/html');
1260: }
1261: &Apache::loncommon::no_cache($request);
1262: $request->send_http_header;
1263:
1264: return OK if $request->header_only;
1265:
1266:
1267: my $file=&Apache::lonnet::filelocation("",$request->uri);
1268: my $filetype;
1269: if ($file =~ /\.sty$/) {
1270: $filetype='sty';
1271: } else {
1272: $filetype='html';
1273: }
1274: #
1275: # Edit action? Save file.
1276: #
1277: unless ($ENV{'request.state'} eq 'published') {
1278: if (($ENV{'form.savethisfile'}) || ($ENV{'form.attemptclean'})) {
1279: if (&storefile($file,$ENV{'form.filecont'})) {
1280: $request->print("<font COLOR=\"#0000FF\">Updated: ". strftime("%d %b %H:%M:%S",localtime())." </font>");
1281: }
1282: }
1283: }
1284: my %mystyle;
1285: my $result = '';
1286: my $filecontents=&Apache::lonnet::getfile($file);
1287: if ($filecontents eq -1) {
1288: $result=(<<ENDNOTFOUND);
1289: <html>
1290: <head>
1291: <title>File not found</title>
1292: </head>
1293: <body bgcolor="#FFFFFF">
1294: <b>File not found: $file</b>
1295: </body>
1296: </html>
1297: ENDNOTFOUND
1298: $filecontents='';
1299: if ($ENV{'request.state'} ne 'published') {
1300: if ($filetype eq 'sty') {
1301: $filecontents=&createnewsty();
1302: } else {
1303: $filecontents=&createnewhtml();
1304: }
1305: $ENV{'form.editmode'}='Edit'; #force edit mode
1306: }
1307: } else {
1308: unless ($ENV{'request.state'} eq 'published') {
1309: if ($ENV{'form.attemptclean'}) {
1310: $filecontents=&htmlclean($filecontents,1);
1311: }
1312: #
1313: # we are in construction space, see if edit mode forced
1314: &Apache::loncommon::get_unprocessed_cgi
1315: ($ENV{'QUERY_STRING'},['editmode']);
1316: }
1317: if (!$ENV{'form.editmode'} || $ENV{'form.viewmode'}) {
1318: $result = &Apache::lonxml::xmlparse($request,$target,$filecontents,
1319: '',%mystyle);
1320: }
1321: }
1322:
1323: #
1324: # Edit action? Insert editing commands
1325: #
1326: unless ($ENV{'request.state'} eq 'published') {
1327: if ($ENV{'form.editmode'} && (!($ENV{'form.viewmode'}))) {
1328: my $displayfile=$request->uri;
1329: $displayfile=~s/^\/[^\/]*//;
1330: $result='<html><body bgcolor="#FFFFFF"><h3>'.$displayfile.
1331: '</h3></body></html>';
1332: $result=&inserteditinfo($result,$filecontents,$filetype);
1333: }
1334: }
1335: if ($filetype eq 'html') { writeallows($request->uri); }
1336:
1337:
1338:
1339: $request->print($result);
1340:
1341: return OK;
1342: }
1343:
1344: sub display_title {
1345: my $result;
1346: if ($ENV{'request.state'} eq 'construct') {
1347: my $title=&Apache::lonnet::gettitle();
1348: if (!defined($title) || $title eq '') {
1349: $title = $ENV{'request.filename'};
1350: $title = substr($title, rindex($title, '/') + 1);
1351: }
1352: $result = "<script type='text/javascript'>top.document.title = '$title - LON-CAPA Construction Space';</script>";
1353: }
1354: return $result;
1355: }
1356:
1357: sub debug {
1358: if ($Apache::lonxml::debug eq 1) {
1359: $|=1;
1360: print('<font size="-2"<pre>DEBUG:'.&HTML::Entities::encode($_[0])."</pre></font>\n");
1361: }
1362: }
1363:
1364: sub error {
1365: $errorcount++;
1366: if (($Apache::lonxml::debug eq 1) || ($ENV{'request.state'} eq 'construct') ) {
1367: # If printing in construction space, put the error inside <pre></pre>
1368: print "<b>ERROR:</b>".join("\n",@_)."\n";
1369: } else {
1370: print "<b>An Error occured while processing this resource. The instructor has been notified.</b> <br />";
1371: #notify author
1372: &Apache::lonmsg::author_res_msg($ENV{'request.filename'},join('<br />',@_));
1373: #notify course
1374: if ( $ENV{'request.course.id'} ) {
1375: my (undef,%users)=&Apache::lonfeedback::decide_receiver(undef,0,1,1,1);
1376: my $declutter=&Apache::lonnet::declutter($ENV{'request.filename'});
1377: foreach (keys %users) {
1378: my ($user,$domain) = split(/:/, $_);
1379: &Apache::lonmsg::user_normal_msg($user,$domain,
1380: "Error [$declutter]",join('<br />',@_));
1381: }
1382: }
1383:
1384: #FIXME probably shouldn't have me get everything forever.
1385: &Apache::lonmsg::user_normal_msg('albertel','msu',"Error in $ENV{'request.filename'}",join('<br />',@_));
1386: #&Apache::lonmsg::user_normal_msg('albertel','103',"Error in $ENV{'request.filename'}",$_[0]);
1387: }
1388: }
1389:
1390: sub warning {
1391: $warningcount++;
1392:
1393: if ($ENV{'form.grade_target'} ne 'tex') {
1394: if ($ENV{'request.state'} eq 'construct' || $Apache::lonxml::debug) {
1395: print "<b>W</b>ARNING<b>:</b>".join('<br />',@_)."<br />\n";
1396: }
1397: }
1398: }
1399:
1400: sub get_param {
1401: my ($param,$parstack,$safeeval,$context,$case_insensitive) = @_;
1402: if ( ! $context ) { $context = -1; }
1403: my $args ='';
1404: if ( $#$parstack > (-2-$context) ) { $args=$$parstack[$context]; }
1405: if ( ! $args ) { return undef; }
1406: if ( $case_insensitive ) {
1407: if ($args =~ s/(my \$)(\Q$param\E)(=\")/$1.lc($2).$3/ei) {
1408: return &Apache::run::run("{$args;".'return $'.$param.'}',
1409: $safeeval); #'
1410: } else {
1411: return undef;
1412: }
1413: } else {
1414: if ( $args =~ /my \$\Q$param\E=\"/ ) {
1415: return &Apache::run::run("{$args;".'return $'.$param.'}',
1416: $safeeval); #'
1417: } else {
1418: return undef;
1419: }
1420: }
1421: }
1422:
1423: sub get_param_var {
1424: my ($param,$parstack,$safeeval,$context,$case_insensitive) = @_;
1425: if ( ! $context ) { $context = -1; }
1426: my $args ='';
1427: if ( $#$parstack > (-2-$context) ) { $args=$$parstack[$context]; }
1428: &Apache::lonxml::debug("Args are $args param is $param");
1429: if ($case_insensitive) {
1430: if (! ($args=~s/(my \$)(\Q$param\E)(=\")/$1.lc($2).$3/ei)) {
1431: return undef;
1432: }
1433: } elsif ( $args !~ /my \$\Q$param\E=\"/ ) { return undef; }
1434: my $value=&Apache::run::run("{$args;".'return $'.$param.'}',$safeeval); #'
1435: &Apache::lonxml::debug("first run is $value");
1436: if ($value =~ /^[\$\@\%]\w+$/) {
1437: &Apache::lonxml::debug("doing second");
1438: my @result=&Apache::run::run("return $value",$safeeval,1);
1439: if (!defined($result[0])) {
1440: return $value
1441: } else {
1442: if (wantarray) { return @result; } else { return $result[0]; }
1443: }
1444: } else {
1445: return $value;
1446: }
1447: }
1448:
1449: sub register_insert {
1450: my @data = split /\n/, &Apache::lonnet::getfile('/home/httpd/lonTabs/insertlist.tab');
1451: my $i;
1452: my $tagnum=0;
1453: my @order;
1454: for ($i=0;$i < $#data; $i++) {
1455: my $line = $data[$i];
1456: if ( $line =~ /^\#/ || $line =~ /^\s*\n/) { next; }
1457: if ( $line =~ /TABLE/ ) { last; }
1458: my ($tag,$descrip,$color,$function,$show,$helpfile,$helpdesc) = split(/,/, $line);
1459: if ($tag) {
1460: $insertlist{"$tagnum.tag"} = $tag;
1461: $insertlist{"$tagnum.description"} = $descrip;
1462: $insertlist{"$tagnum.color"} = $color;
1463: $insertlist{"$tagnum.function"} = $function;
1464: if (!defined($show)) { $show='yes'; }
1465: $insertlist{"$tagnum.show"}= $show;
1466: $insertlist{"$tagnum.helpfile"} = $helpfile;
1467: $insertlist{"$tagnum.helpdesc"} = $helpdesc;
1468: $insertlist{"$tag.num"}=$tagnum;
1469: $tagnum++;
1470: }
1471: }
1472: $i++; #skipping TABLE line
1473: $tagnum = 0;
1474: for (;$i < $#data;$i++) {
1475: my $line = $data[$i];
1476: my ($mnemonic,@which) = split(/ +/,$line);
1477: my $tag = $insertlist{"$tagnum.tag"};
1478: for (my $j=0;$j <=$#which;$j++) {
1479: if ( $which[$j] eq 'Y' ) {
1480: if ($insertlist{"$j.show"} ne 'no') {
1481: push(@{ $insertlist{"$tag.which"} },$j);
1482: }
1483: }
1484: }
1485: $tagnum++;
1486: }
1487: }
1488:
1489: sub description {
1490: my ($token)=@_;
1491: my $tagnum;
1492: my $tag=$token->[1];
1493: foreach my $namespace (reverse @Apache::lonxml::namespace) {
1494: my $testtag=$namespace.'::'.$tag;
1495: $tagnum=$insertlist{"$testtag.num"};
1496: if (defined($tagnum)) { last; }
1497: }
1498: if (!defined ($tagnum)) { $tagnum=$Apache::lonxml::insertlist{"$tag.num"}; }
1499: return $insertlist{$tagnum.'.description'};
1500: }
1501:
1502: # Returns a list containing the help file, and the description
1503: sub helpinfo {
1504: my ($token)=@_;
1505: my $tagnum;
1506: my $tag=$token->[1];
1507: foreach my $namespace (reverse @Apache::lonxml::namespace) {
1508: my $testtag=$namespace.'::'.$tag;
1509: $tagnum=$insertlist{"$testtag.num"};
1510: if (defined($tagnum)) { last; }
1511: }
1512: if (!defined ($tagnum)) { $tagnum=$Apache::lonxml::insertlist{"$tag.num"}; }
1513: return ($insertlist{$tagnum.'.helpfile'}, $insertlist{$tagnum.'.helpdesc'});
1514: }
1515:
1516: # ----------------------------------------------------------------- whichuser
1517: # returns a list of $symb, $courseid, $domain, $name that is correct for
1518: # calls to lonnet functions for this setup.
1519: # - looks for form.grade_ parameters
1520: sub whichuser {
1521: my ($passedsymb)=@_;
1522: my ($symb,$courseid,$domain,$name,$publicuser);
1523: if (defined($ENV{'form.grade_symb'})) {
1524: my $tmp_courseid=$ENV{'form.grade_courseid'};
1525: my $allowed=&Apache::lonnet::allowed('vgr',$tmp_courseid);
1526: if ($allowed) {
1527: $symb=$ENV{'form.grade_symb'};
1528: $courseid=$ENV{'form.grade_courseid'};
1529: $domain=$ENV{'form.grade_domain'};
1530: $name=$ENV{'form.grade_username'};
1531: }
1532: } else {
1533: if (!$passedsymb) {
1534: $symb=&Apache::lonnet::symbread();
1535: } else {
1536: $symb=$passedsymb;
1537: }
1538: $courseid=$ENV{'request.course.id'};
1539: $domain=$ENV{'user.domain'};
1540: $name=$ENV{'user.name'};
1541: if ($name eq 'public' && $domain eq 'public') {
1542: if (!defined($ENV{'form.username'})) {
1543: $ENV{'form.username'}.=time.rand(10000000);
1544: }
1545: $name.=$ENV{'form.username'};
1546: }
1547: }
1548: return ($symb,$courseid,$domain,$name,$publicuser);
1549: }
1550:
1551: 1;
1552: __END__
1553:
1554:
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