1: # The LearningOnline Network with CAPA
2: # XML Parser Module
3: #
4: # $Id: lonxml.pm,v 1.272 2003/08/13 18:57:28 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: unless ($symb) {
188: $symb=&Apache::lonnet::symbread();
189: }
190: if ($symb) {
191: my %contrib=&Apache::lonnet::restore($symb,$ENV{'request.course.id'},
192: $ENV{'course.'.$ENV{'request.course.id'}.'.domain'},
193: $ENV{'course.'.$ENV{'request.course.id'}.'.num'});
194: if ($contrib{'version'}) {
195: unless ($discussiononly) {
196: $discussion.=
197: '<address><hr />';
198: }
199: my $idx;
200: for ($idx=1;$idx<=$contrib{'version'};$idx++) {
201: my $hidden=($contrib{'hidden'}=~/\.$idx\./);
202: my $deleted=($contrib{'deleted'}=~/\.$idx\./);
203: unless ((($hidden) && (!$seeid)) || ($deleted)) {
204: my $message=$contrib{$idx.':message'};
205: $message=~s/\n/\<br \/\>/g;
206: $message=&Apache::lontexconvert::msgtexconverted($message);
207: if ($contrib{$idx.':attachmenturl'}) {
208: my ($fname,$ft)
209: =($contrib{$idx.':attachmenturl'}=~/\/(\w+)\.(\w+)$/);
210: $message.='<p>Attachment: <a href="'.
211: &Apache::lonnet::tokenwrapper($contrib{$idx.':attachmenturl'}).
212: '"><tt>'.$fname.'.'.$ft.'</tt></a>';
213: }
214: if ($message) {
215: if ($hidden) {
216: $message='<font color="#888888">'.$message.'</font>';
217: }
218: my $screenname=&Apache::loncommon::screenname(
219: $contrib{$idx.':sendername'},
220: $contrib{$idx.':senderdomain'});
221: my $plainname=&Apache::loncommon::nickname(
222: $contrib{$idx.':sendername'},
223: $contrib{$idx.':senderdomain'});
224:
225: my $sender='Anonymous';
226: if ((!$contrib{$idx.':anonymous'}) || ($seeid)) {
227: $sender=&Apache::loncommon::aboutmewrapper(
228: $plainname,
229: $contrib{$idx.':sendername'},
230: $contrib{$idx.':senderdomain'}).' ('.
231: $contrib{$idx.':sendername'}.' at '.
232: $contrib{$idx.':senderdomain'}.')';
233: if ($contrib{$idx.':anonymous'}) {
234: $sender.=' [anonymous] '.
235: $screenname;
236: }
237: if ($seeid) {
238: if ($hidden) {
239: $sender.=' <a href="/adm/feedback?unhide='.
240: $symb.':::'.$idx.'">Make Visible</a>';
241: } else {
242: $sender.=' <a href="/adm/feedback?hide='.
243: $symb.':::'.$idx.'">Hide</a>';
244: }
245: $sender.=' <a href="/adm/feedback?deldisc='.
246: $symb.':::'.$idx.'">Delete</a>';
247: }
248: } else {
249: if ($screenname) {
250: $sender='<i>'.$screenname.'</i>';
251: }
252: }
253: $discussion.='<p><b>'.$sender.'</b> ('.
254: localtime($contrib{$idx.':timestamp'}).
255: '):<blockquote>'.$message.
256: '</blockquote></p>';
257: }
258: }
259: }
260: unless ($discussiononly) {
261: $discussion.='</address>';
262: }
263: }
264: if ($discussiononly) {
265: $discussion.=(<<ENDDISCUSS);
266: <form action="/adm/feedback" method="post" name="mailform" enctype="multipart/form-data">
267: <input type="submit" name="discuss" value="Post Discussion" />
268: <input type="submit" name="anondiscuss" value="Post Anonymous Discussion" />
269: <input type="hidden" name="symb" value="$symb" />
270: <input type="hidden" name="sendit" value="true" />
271: <br />
272: <font size="1">Note: in anonymous discussion, your name is visible only to
273: course faculty</font><br />
274: <textarea name=comment cols=60 rows=10 wrap=hard></textarea>
275: <p>
276: Attachment (128 KB max size): <input type="file" name="attachment" />
277: </p>
278: </form>
279: ENDDISCUSS
280: $discussion.=&Apache::lonfeedback::generate_preview_button();
281: }
282: }
283: }
284: return $discussion.($discussiononly?'':'</html>');
285: }
286:
287: sub tokeninputfield {
288: my $defhost=$Apache::lonnet::perlvar{'lonHostID'};
289: $defhost=~tr/a-z/A-Z/;
290: return (<<ENDINPUTFIELD)
291: <script type="text/javascript">
292: function updatetoken() {
293: var comp=new Array;
294: var barcode=unescape(document.tokeninput.barcode.value);
295: comp=barcode.split('*');
296: if (typeof(comp[0])!="undefined") {
297: document.tokeninput.codeone.value=comp[0];
298: }
299: if (typeof(comp[1])!="undefined") {
300: document.tokeninput.codetwo.value=comp[1];
301: }
302: if (typeof(comp[2])!="undefined") {
303: comp[2]=comp[2].toUpperCase();
304: document.tokeninput.codethree.value=comp[2];
305: }
306: document.tokeninput.barcode.value='';
307: }
308: </script>
309: <form method="post" name="tokeninput">
310: <table border="2" bgcolor="#FFFFBB">
311: <tr><th>DocID Checkin</th></tr>
312: <tr><td>
313: <table>
314: <tr>
315: <td>Scan in Barcode</td>
316: <td><input type="text" size="22" name="barcode"
317: onChange="updatetoken()"/></td>
318: </tr>
319: <tr><td><i>or</i> Type in DocID</td>
320: <td>
321: <input type="text" size="5" name="codeone" />
322: <b><font size="+2">*</font></b>
323: <input type="text" size="5" name="codetwo" />
324: <b><font size="+2">*</font></b>
325: <input type="text" size="10" name="codethree" value="$defhost"
326: onChange="this.value=this.value.toUpperCase()" />
327: </td></tr>
328: </table>
329: </td></tr>
330: <tr><td><input type="submit" value="Check in DocID" /></td></tr>
331: </table>
332: </form>
333: ENDINPUTFIELD
334: }
335:
336: sub maketoken {
337: my ($symb,$tuname,$tudom,$tcrsid)=@_;
338: unless ($symb) {
339: $symb=&Apache::lonnet::symbread();
340: }
341: unless ($tuname) {
342: $tuname=$ENV{'user.name'};
343: $tudom=$ENV{'user.domain'};
344: $tcrsid=$ENV{'request.course.id'};
345: }
346:
347: return &Apache::lonnet::checkout($symb,$tuname,$tudom,$tcrsid);
348: }
349:
350: sub printtokenheader {
351: my ($target,$token,$tsymb,$tcrsid,$tudom,$tuname)=@_;
352: unless ($token) { return ''; }
353:
354: my ($symb,$courseid,$domain,$name) = &Apache::lonxml::whichuser();
355: unless ($tsymb) {
356: $tsymb=$symb;
357: }
358: unless ($tuname) {
359: $tuname=$name;
360: $tudom=$domain;
361: $tcrsid=$courseid;
362: }
363:
364: my %reply=&Apache::lonnet::get('environment',
365: ['firstname','middlename','lastname','generation'],
366: $tudom,$tuname);
367: my $plainname=$reply{'firstname'}.' '.
368: $reply{'middlename'}.' '.
369: $reply{'lastname'}.' '.
370: $reply{'generation'};
371:
372: if ($target eq 'web') {
373: my %idhash=&Apache::lonnet::idrget($tudom,($tuname));
374: return
375: '<img align="right" src="/cgi-bin/barcode.png?encode='.$token.'" />'.
376: 'Checked out for '.$plainname.
377: '<br />User: '.$tuname.' at '.$tudom.
378: '<br />ID: '.$idhash{$tuname}.
379: '<br />CourseID: '.$tcrsid.
380: '<br />Course: '.$ENV{'course.'.$tcrsid.'.description'}.
381: '<br />DocID: '.$token.
382: '<br />Time: '.localtime().'<hr />';
383: } else {
384: return $token;
385: }
386: }
387:
388: sub fontsettings() {
389: my $headerstring='';
390: if (($ENV{'browser.os'} eq 'mac') && (!$ENV{'browser.mathml'})) {
391: $headerstring.=
392: '<meta Content-Type="text/html; charset=x-mac-roman">';
393: } elsif (!$ENV{'browser.mathml'} && $ENV{'browser.unicode'}) {
394: $headerstring.=
395: '<meta http-equiv="Content-Type" content="text/html; charset=utf-8" />';
396: }
397: return $headerstring;
398: }
399:
400: sub printalltags {
401: my $temp;
402: foreach $temp (sort keys %Apache::lonxml::alltags) {
403: &Apache::lonxml::debug("$temp -- ".
404: join(',',@{ $Apache::lonxml::alltags{$temp} }));
405: }
406: }
407:
408: sub xmlparse {
409: my ($request,$target,$content_file_string,$safeinit,%style_for_target) = @_;
410:
411: &setup_globals($request,$target);
412: &Apache::inputtags::initialize_inputtags();
413: &Apache::outputtags::initialize_outputtags();
414: &Apache::edit::initialize_edit();
415:
416: #
417: # do we have a course style file?
418: #
419:
420: if ($ENV{'request.course.id'} && $ENV{'request.state'} ne 'construct') {
421: my $bodytext=
422: $ENV{'course.'.$ENV{'request.course.id'}.'.default_xml_style'};
423: if ($bodytext) {
424: my $location=&Apache::lonnet::filelocation('',$bodytext);
425: my $styletext=&Apache::lonnet::getfile($location);
426: if ($styletext ne '-1') {
427: %style_for_target = (%style_for_target,
428: &Apache::style::styleparser($target,$styletext));
429: }
430: }
431: }
432: #&printalltags();
433: my @pars = ();
434: my $pwd=$ENV{'request.filename'};
435: $pwd =~ s:/[^/]*$::;
436: &newparser(\@pars,\$content_file_string,$pwd);
437:
438: my $safeeval = new Safe;
439: my $safehole = new Safe::Hole;
440: &init_safespace($target,$safeeval,$safehole,$safeinit);
441: #-------------------- Redefinition of the target in the case of compound target
442:
443: ($target, my @tenta) = split('&&',$target);
444:
445: my @stack = ();
446: my @parstack = ();
447: &initdepth;
448:
449: my $finaloutput = &inner_xmlparse($target,\@stack,\@parstack,\@pars,
450: $safeeval,\%style_for_target);
451:
452: if ($ENV{'request.uri'}) {
453: &writeallows($ENV{'request.uri'});
454: }
455: if ($Apache::lonxml::counter_changed) { &store_counter() }
456: return $finaloutput;
457: }
458:
459: sub htmlclean {
460: my ($raw,$full)=@_;
461:
462: my $tree = HTML::TreeBuilder->new;
463: $tree->ignore_unknown(0);
464:
465: $tree->parse($raw);
466:
467: my $output= $tree->as_HTML(undef,' ');
468:
469: $output=~s/\<(br|hr|img|meta|allow)(.*?)\>/\<$1$2 \/\>/gis;
470: $output=~s/\<\/(br|hr|img|meta|allow)\>//gis;
471: unless ($full) {
472: $output=~s/\<[\/]*(body|head|html)\>//gis;
473: }
474:
475: $tree = $tree->delete;
476:
477: return $output;
478: }
479:
480: sub latex_special_symbols {
481: my ($string,$where)=@_;
482: if ($where eq 'header') {
483: $string =~ s/(\\|_|\^)/ /g;
484: $string =~ s/(\$|%|\#|&|\{|\})/\\$1/g;
485: } else {
486: $string=~s/\\ /\\char92 /g;
487: $string=~s/\^/\\char94 /g;
488: $string=~s/\~/\\char126 /g;
489: $string=~s/(&[^A-Za-z\#])/\\$1/g;
490: $string=~s/([^&])\#/$1\\#/g;
491: $string=~s/(\$|_|{|})/\\$1/g;
492: $string=~s/\\char92 /\\texttt{\\char92}/g;
493: $string=~s/(>|<)/\$$1\$/g; #more or less
494: if ($string=~m/\d%/) {$string =~ s/(\d)%/$1\\%/g;} #percent after digit
495: if ($string=~m/\s%/) {$string =~ s/(\s)%/$1\\%/g;} #percent after space
496: if ($string eq '%.') {$string = '\%.';} #percent at the end of statement
497: }
498: return $string;
499: }
500:
501: sub inner_xmlparse {
502: my ($target,$stack,$parstack,$pars,$safeeval,$style_for_target)=@_;
503: my $finaloutput = '';
504: my $result;
505: my $token;
506: my $dontpop=0;
507: while ( $#$pars > -1 ) {
508: while ($token = $$pars['-1']->get_token) {
509: if (($token->[0] eq 'T') || ($token->[0] eq 'C') ) {
510: if ($metamode<1) {
511: my $text=$token->[1];
512: if ($token->[0] eq 'C' && $target eq 'tex') {
513: $text = '';
514: # $text = '%'.$text."\n";
515: }
516: $result.=$text;
517: }
518: } elsif (($token->[0] eq 'D')) {
519: if ($metamode<1 && $target eq 'web') {
520: my $text=$token->[1];
521: $result.=$text;
522: }
523: } elsif ($token->[0] eq 'PI') {
524: if ($metamode<1 && $target eq 'web') {
525: $result=$token->[2];
526: }
527: } elsif ($token->[0] eq 'S') {
528: # add tag to stack
529: push (@$stack,$token->[1]);
530: # add parameters list to another stack
531: push (@$parstack,&parstring($token));
532: &increasedepth($token);
533: if ($Apache::lonxml::usestyle &&
534: exists($$style_for_target{$token->[1]})) {
535: $Apache::lonxml::usestyle=0;
536: my $string=$$style_for_target{$token->[1]}.
537: '<LONCAPA_INTERNAL_TURN_STYLE_ON />';
538: &Apache::lonxml::newparser($pars,\$string);
539: $Apache::lonxml::style_values=$$parstack[-1];
540: $Apache::lonxml::style_end_values=$$parstack[-1];
541: } else {
542: $result = &callsub("start_$token->[1]", $target, $token, $stack,
543: $parstack, $pars, $safeeval, $style_for_target);
544: }
545: } elsif ($token->[0] eq 'E') {
546: if ($Apache::lonxml::usestyle &&
547: exists($$style_for_target{'/'."$token->[1]"})) {
548: $Apache::lonxml::usestyle=0;
549: my $string=$$style_for_target{'/'.$token->[1]}.
550: '<LONCAPA_INTERNAL_TURN_STYLE_ON end="'.$token->[1].'" />';
551: &Apache::lonxml::newparser($pars,\$string);
552: $Apache::lonxml::style_values=$Apache::lonxml::style_end_values;
553: $Apache::lonxml::style_end_values='';
554: $dontpop=1;
555: } else {
556: #clear out any tags that didn't end
557: while ($token->[1] ne $$stack['-1'] && ($#$stack > -1)) {
558: my $lasttag=$$stack[-1];
559: if ($token->[1] =~ /^$lasttag$/i) {
560: &Apache::lonxml::warning('Using tag </'.$token->[1].'> on line '.$token->[3].' as end tag to <'.$$stack[-1].'>');
561: last;
562: } else {
563: &Apache::lonxml::warning('Found tag </'.$token->[1].'> on line '.$token->[3].' when looking for </'.$$stack[-1].'> in file');
564: &end_tag($stack,$parstack,$token);
565: }
566: }
567: $result = &callsub("end_$token->[1]", $target, $token, $stack,
568: $parstack, $pars,$safeeval, $style_for_target);
569: }
570: } else {
571: &Apache::lonxml::error("Unknown token event :$token->[0]:$token->[1]:");
572: }
573: #evaluate variable refs in result
574: if ($result ne "") {
575: my $extras;
576: if (!$Apache::lonxml::usestyle) {
577: $extras=$Apache::lonxml::style_values;
578: }
579: if ( $#$parstack > -1 ) {
580: $result=&Apache::run::evaluate($result,$safeeval,$extras.$$parstack[-1]);
581: } else {
582: $result= &Apache::run::evaluate($result,$safeeval,$extras);
583: }
584: }
585: if (($token->[0] eq 'T') || ($token->[0] eq 'C') || ($token->[0] eq 'D') ) {
586: #Style file definitions should be correct
587: if ($target eq 'tex' && ($Apache::lonxml::usestyle)) {
588: $result=&latex_special_symbols($result);
589: }
590: }
591:
592: # Encode any high ASCII characters
593: if (!$Apache::lonxml::prevent_entity_encode) {
594: $result=&HTML::Entities::encode($result,"\200-\377");
595: }
596: if ($Apache::lonxml::redirection) {
597: $Apache::lonxml::outputstack['-1'] .= $result;
598: } else {
599: $finaloutput.=$result;
600: }
601: $result = '';
602:
603: if ($token->[0] eq 'E' && !$dontpop) {
604: &end_tag($stack,$parstack,$token);
605: }
606: $dontpop=0;
607: }
608: if ($#$pars > -1) {
609: pop @$pars;
610: pop @Apache::lonxml::pwd;
611: }
612: }
613:
614: # if ($target eq 'meta') {
615: # $finaloutput.=&endredirection;
616: # }
617:
618:
619: if (($ENV{'QUERY_STRING'}) && ($target eq 'web')) {
620: $finaloutput=&afterburn($finaloutput);
621: }
622: return $finaloutput;
623: }
624:
625: sub callsub {
626: my ($sub,$target,$token,$tagstack,$parstack,$parser,$safeeval,$style)=@_;
627: my $currentstring='';
628: my $nodefault;
629: {
630: my $sub1;
631: no strict 'refs';
632: my $tag=$token->[1];
633: # get utterly rid of extended html tags
634: if ($tag=~/^x\-/i) { return ''; }
635: my $space=$Apache::lonxml::alltags{$tag}[-1];
636: if (!$space) {
637: $tag=~tr/A-Z/a-z/;
638: $sub=~tr/A-Z/a-z/;
639: $space=$Apache::lonxml::alltags{$tag}[-1]
640: }
641:
642: my $deleted=0;
643: $Apache::lonxml::curdepth=join('_',@Apache::lonxml::depthcounter);
644: if (($token->[0] eq 'S') && ($target eq 'modified')) {
645: $deleted=&Apache::edit::handle_delete($space,$target,$token,$tagstack,
646: $parstack,$parser,$safeeval,
647: $style);
648: }
649: if (!$deleted) {
650: if ($space) {
651: #&Apache::lonxml::debug("Calling sub $sub in $space $metamode");
652: $sub1="$space\:\:$sub";
653: ($currentstring,$nodefault) = &$sub1($target,$token,$tagstack,
654: $parstack,$parser,$safeeval,
655: $style);
656: } else {
657: #&Apache::lonxml::debug("NOT Calling sub $sub in $space $metamode");
658: if ($metamode <1) {
659: if (defined($token->[4]) && ($metamode < 1)) {
660: $currentstring = $token->[4];
661: } else {
662: $currentstring = $token->[2];
663: }
664: }
665: }
666: # &Apache::lonxml::debug("nodefalt:$nodefault:");
667: if ($currentstring eq '' && $nodefault eq '') {
668: if ($target eq 'edit') {
669: #&Apache::lonxml::debug("doing default edit for $token->[1]");
670: if ($token->[0] eq 'S') {
671: $currentstring = &Apache::edit::tag_start($target,$token);
672: } elsif ($token->[0] eq 'E') {
673: $currentstring = &Apache::edit::tag_end($target,$token);
674: }
675: } elsif ($target eq 'modified') {
676: if ($token->[0] eq 'S') {
677: $currentstring = $token->[4];
678: $currentstring.=&Apache::edit::handle_insert();
679: } elsif ($token->[0] eq 'E') {
680: $currentstring = $token->[2];
681: $currentstring.=&Apache::edit::handle_insertafter($token->[1]);
682: } else {
683: $currentstring = $token->[2];
684: }
685: }
686: }
687: }
688: use strict 'refs';
689: }
690: return $currentstring;
691: }
692:
693: sub setup_globals {
694: my ($request,$target)=@_;
695: $Apache::lonxml::request=$request;
696: $Apache::lonxml::registered = 0;
697: $errorcount=0;
698: $warningcount=0;
699: $Apache::lonxml::default_homework_loaded=0;
700: $Apache::lonxml::usestyle=1;
701: &init_counter();
702: @Apache::lonxml::pwd=();
703: @Apache::lonxml::extlinks=();
704: if ($target eq 'meta') {
705: $Apache::lonxml::redirection = 0;
706: $Apache::lonxml::metamode = 1;
707: $Apache::lonxml::evaluate = 1;
708: $Apache::lonxml::import = 0;
709: } elsif ($target eq 'answer') {
710: $Apache::lonxml::redirection = 0;
711: $Apache::lonxml::metamode = 1;
712: $Apache::lonxml::evaluate = 1;
713: $Apache::lonxml::import = 1;
714: } elsif ($target eq 'grade') {
715: &startredirection;
716: $Apache::lonxml::metamode = 0;
717: $Apache::lonxml::evaluate = 1;
718: $Apache::lonxml::import = 1;
719: } elsif ($target eq 'modified') {
720: $Apache::lonxml::redirection = 0;
721: $Apache::lonxml::metamode = 0;
722: $Apache::lonxml::evaluate = 0;
723: $Apache::lonxml::import = 0;
724: } elsif ($target eq 'edit') {
725: $Apache::lonxml::redirection = 0;
726: $Apache::lonxml::metamode = 0;
727: $Apache::lonxml::evaluate = 0;
728: $Apache::lonxml::import = 0;
729: } elsif ($target eq 'analyze') {
730: $Apache::lonxml::redirection = 0;
731: $Apache::lonxml::metamode = 0;
732: $Apache::lonxml::evaluate = 1;
733: $Apache::lonxml::import = 1;
734: } else {
735: $Apache::lonxml::redirection = 0;
736: $Apache::lonxml::metamode = 0;
737: $Apache::lonxml::evaluate = 1;
738: $Apache::lonxml::import = 1;
739: }
740: }
741:
742: sub init_safespace {
743: my ($target,$safeeval,$safehole,$safeinit) = @_;
744: $safeeval->permit("entereval");
745: $safeeval->permit(":base_math");
746: $safeeval->permit("sort");
747: $safeeval->deny(":base_io");
748: $safehole->wrap(\&Apache::scripttag::xmlparse,$safeeval,'&xmlparse');
749: $safehole->wrap(\&Apache::outputtags::multipart,$safeeval,'&multipart');
750: $safehole->wrap(\&Apache::lonnet::EXT,$safeeval,'&EXT');
751:
752: $safehole->wrap(\&Math::Cephes::asin,$safeeval,'&asin');
753: $safehole->wrap(\&Math::Cephes::acos,$safeeval,'&acos');
754: $safehole->wrap(\&Math::Cephes::atan,$safeeval,'&atan');
755: $safehole->wrap(\&Math::Cephes::sinh,$safeeval,'&sinh');
756: $safehole->wrap(\&Math::Cephes::cosh,$safeeval,'&cosh');
757: $safehole->wrap(\&Math::Cephes::tanh,$safeeval,'&tanh');
758: $safehole->wrap(\&Math::Cephes::asinh,$safeeval,'&asinh');
759: $safehole->wrap(\&Math::Cephes::acosh,$safeeval,'&acosh');
760: $safehole->wrap(\&Math::Cephes::atanh,$safeeval,'&atanh');
761: $safehole->wrap(\&Math::Cephes::erf,$safeeval,'&erf');
762: $safehole->wrap(\&Math::Cephes::erfc,$safeeval,'&erfc');
763: $safehole->wrap(\&Math::Cephes::j0,$safeeval,'&j0');
764: $safehole->wrap(\&Math::Cephes::j1,$safeeval,'&j1');
765: $safehole->wrap(\&Math::Cephes::jn,$safeeval,'&jn');
766: $safehole->wrap(\&Math::Cephes::jv,$safeeval,'&jv');
767: $safehole->wrap(\&Math::Cephes::y0,$safeeval,'&y0');
768: $safehole->wrap(\&Math::Cephes::y1,$safeeval,'&y1');
769: $safehole->wrap(\&Math::Cephes::yn,$safeeval,'&yn');
770: $safehole->wrap(\&Math::Cephes::yv,$safeeval,'&yv');
771:
772: $safehole->wrap(\&Math::Cephes::bdtr ,$safeeval,'&bdtr' );
773: $safehole->wrap(\&Math::Cephes::bdtrc ,$safeeval,'&bdtrc' );
774: $safehole->wrap(\&Math::Cephes::bdtri ,$safeeval,'&bdtri' );
775: $safehole->wrap(\&Math::Cephes::btdtr ,$safeeval,'&btdtr' );
776: $safehole->wrap(\&Math::Cephes::chdtr ,$safeeval,'&chdtr' );
777: $safehole->wrap(\&Math::Cephes::chdtrc,$safeeval,'&chdtrc');
778: $safehole->wrap(\&Math::Cephes::chdtri,$safeeval,'&chdtri');
779: $safehole->wrap(\&Math::Cephes::fdtr ,$safeeval,'&fdtr' );
780: $safehole->wrap(\&Math::Cephes::fdtrc ,$safeeval,'&fdtrc' );
781: $safehole->wrap(\&Math::Cephes::fdtri ,$safeeval,'&fdtri' );
782: $safehole->wrap(\&Math::Cephes::gdtr ,$safeeval,'&gdtr' );
783: $safehole->wrap(\&Math::Cephes::gdtrc ,$safeeval,'&gdtrc' );
784: $safehole->wrap(\&Math::Cephes::nbdtr ,$safeeval,'&nbdtr' );
785: $safehole->wrap(\&Math::Cephes::nbdtrc,$safeeval,'&nbdtrc');
786: $safehole->wrap(\&Math::Cephes::nbdtri,$safeeval,'&nbdtri');
787: $safehole->wrap(\&Math::Cephes::ndtr ,$safeeval,'&ndtr' );
788: $safehole->wrap(\&Math::Cephes::ndtri ,$safeeval,'&ndtri' );
789: $safehole->wrap(\&Math::Cephes::pdtr ,$safeeval,'&pdtr' );
790: $safehole->wrap(\&Math::Cephes::pdtrc ,$safeeval,'&pdtrc' );
791: $safehole->wrap(\&Math::Cephes::pdtri ,$safeeval,'&pdtri' );
792: $safehole->wrap(\&Math::Cephes::stdtr ,$safeeval,'&stdtr' );
793: $safehole->wrap(\&Math::Cephes::stdtri,$safeeval,'&stdtri');
794:
795: # $safehole->wrap(\&Math::Cephes::new_fract,$safeeval,'&new_fract');
796: # $safehole->wrap(\&Math::Cephes::radd,$safeeval,'&radd');
797: # $safehole->wrap(\&Math::Cephes::rsub,$safeeval,'&rsub');
798: # $safehole->wrap(\&Math::Cephes::rmul,$safeeval,'&rmul');
799: # $safehole->wrap(\&Math::Cephes::rdiv,$safeeval,'&rdiv');
800: # $safehole->wrap(\&Math::Cephes::euclid,$safeeval,'&euclid');
801:
802: $safehole->wrap(\&Math::Random::random_beta,$safeeval,'&math_random_beta');
803: $safehole->wrap(\&Math::Random::random_chi_square,$safeeval,'&math_random_chi_square');
804: $safehole->wrap(\&Math::Random::random_exponential,$safeeval,'&math_random_exponential');
805: $safehole->wrap(\&Math::Random::random_f,$safeeval,'&math_random_f');
806: $safehole->wrap(\&Math::Random::random_gamma,$safeeval,'&math_random_gamma');
807: $safehole->wrap(\&Math::Random::random_multivariate_normal,$safeeval,'&math_random_multivariate_normal');
808: $safehole->wrap(\&Math::Random::random_multinomial,$safeeval,'&math_random_multinomial');
809: $safehole->wrap(\&Math::Random::random_noncentral_chi_square,$safeeval,'&math_random_noncentral_chi_square');
810: $safehole->wrap(\&Math::Random::random_noncentral_f,$safeeval,'&math_random_noncentral_f');
811: $safehole->wrap(\&Math::Random::random_normal,$safeeval,'&math_random_normal');
812: $safehole->wrap(\&Math::Random::random_permutation,$safeeval,'&math_random_permutation');
813: $safehole->wrap(\&Math::Random::random_permuted_index,$safeeval,'&math_random_permuted_index');
814: $safehole->wrap(\&Math::Random::random_uniform,$safeeval,'&math_random_uniform');
815: $safehole->wrap(\&Math::Random::random_poisson,$safeeval,'&math_random_poisson');
816: $safehole->wrap(\&Math::Random::random_uniform_integer,$safeeval,'&math_random_uniform_integer');
817: $safehole->wrap(\&Math::Random::random_negative_binomial,$safeeval,'&math_random_negative_binomial');
818: $safehole->wrap(\&Math::Random::random_binomial,$safeeval,'&math_random_binomial');
819: $safehole->wrap(\&Math::Random::random_seed_from_phrase,$safeeval,'&random_seed_from_phrase');
820: $safehole->wrap(\&Math::Random::random_set_seed_from_phrase,$safeeval,'&random_set_seed_from_phrase');
821: $safehole->wrap(\&Math::Random::random_get_seed,$safeeval,'&random_get_seed');
822: $safehole->wrap(\&Math::Random::random_set_seed,$safeeval,'&random_set_seed');
823:
824: #need to inspect this class of ops
825: # $safeeval->deny(":base_orig");
826: $safeinit .= ';$external::target="'.$target.'";';
827: my $rndseed;
828: my ($symb,$courseid,$domain,$name) = &Apache::lonxml::whichuser();
829: $rndseed=&Apache::lonnet::rndseed($symb,$courseid,$domain,$name);
830: $safeinit .= ';$external::randomseed='.$rndseed.';';
831: &Apache::lonxml::debug("Setting rndseed to $rndseed");
832: &Apache::run::run($safeinit,$safeeval);
833: }
834:
835: sub default_homework_load {
836: my ($safeeval)=@_;
837: &Apache::lonxml::debug('Loading default_homework');
838: my $default=&Apache::lonnet::getfile('/home/httpd/html/res/adm/includes/default_homework.lcpm');
839: if ($default eq -1) {
840: &Apache::lonxml::error("<b>Unable to find <i>default_homework.lcpm</i></b>");
841: } else {
842: &Apache::run::run($default,$safeeval);
843: $Apache::lonxml::default_homework_loaded=1;
844: }
845: }
846:
847: sub startredirection {
848: $Apache::lonxml::redirection++;
849: push (@Apache::lonxml::outputstack, '');
850: }
851:
852: sub endredirection {
853: if (!$Apache::lonxml::redirection) {
854: &Apache::lonxml::error("Endredirection was called, before a startredirection, perhaps you have unbalanced tags. Some debuging information:".join ":",caller);
855: return '';
856: }
857: $Apache::lonxml::redirection--;
858: pop @Apache::lonxml::outputstack;
859: }
860:
861: sub end_tag {
862: my ($tagstack,$parstack,$token)=@_;
863: pop(@$tagstack);
864: pop(@$parstack);
865: &decreasedepth($token);
866: }
867:
868: sub initdepth {
869: @Apache::lonxml::depthcounter=();
870: $Apache::lonxml::depth=-1;
871: $Apache::lonxml::olddepth=-1;
872: }
873:
874: sub increasedepth {
875: my ($token) = @_;
876: $Apache::lonxml::depth++;
877: $Apache::lonxml::depthcounter[$Apache::lonxml::depth]++;
878: if ($Apache::lonxml::depthcounter[$Apache::lonxml::depth]==1) {
879: $Apache::lonxml::olddepth=$Apache::lonxml::depth;
880: }
881: my $curdepth=join('_',@Apache::lonxml::depthcounter);
882: &Apache::lonxml::debug("s $Apache::lonxml::depth : $Apache::lonxml::olddepth : $curdepth : $token->[1]\n");
883: #print "<br />s $Apache::lonxml::depth : $Apache::lonxml::olddepth : $curdepth : $token->[1]\n";
884: }
885:
886: sub decreasedepth {
887: my ($token) = @_;
888: $Apache::lonxml::depth--;
889: if ($Apache::lonxml::depth<$Apache::lonxml::olddepth-1) {
890: $#Apache::lonxml::depthcounter--;
891: $Apache::lonxml::olddepth=$Apache::lonxml::depth+1;
892: }
893: if ( $Apache::lonxml::depth < -1) {
894: &Apache::lonxml::warning("Missing tags, unable to properly run file.");
895: $Apache::lonxml::depth='-1';
896: }
897: my $curdepth=join('_',@Apache::lonxml::depthcounter);
898: &Apache::lonxml::debug("e $Apache::lonxml::depth : $Apache::lonxml::olddepth : $token->[1] : $curdepth\n");
899: #print "<br />e $Apache::lonxml::depth : $Apache::lonxml::olddepth : $token->[1] : $curdepth\n";
900: }
901:
902: sub get_all_text_unbalanced {
903: #there is a copy of this in lonpublisher.pm
904: my($tag,$pars)= @_;
905: my $token;
906: my $result='';
907: $tag='<'.$tag.'>';
908: while ($token = $$pars[-1]->get_token) {
909: if (($token->[0] eq 'T')||($token->[0] eq 'C')||($token->[0] eq 'D')) {
910: $result.=$token->[1];
911: } elsif ($token->[0] eq 'PI') {
912: $result.=$token->[2];
913: } elsif ($token->[0] eq 'S') {
914: $result.=$token->[4];
915: } elsif ($token->[0] eq 'E') {
916: $result.=$token->[2];
917: }
918: if ($result =~ /(.*)\Q$tag\E(.*)/s) {
919: &Apache::lonxml::debug('Got a winner with leftovers ::'.$2);
920: &Apache::lonxml::debug('Result is :'.$1);
921: $result=$1;
922: my $redo=$tag.$2;
923: &Apache::lonxml::newparser($pars,\$redo);
924: last;
925: }
926: }
927: return $result
928: }
929:
930: sub increment_counter {
931: my ($increment) = @_;
932: if (defined($increment) && $increment gt 0) {
933: $Apache::lonxml::counter+=$increment;
934: } else {
935: $Apache::lonxml::counter++;
936: }
937: $Apache::lonxml::counter_changed=1;
938: }
939:
940: sub init_counter {
941: if (defined($ENV{'form.counter'})) {
942: $Apache::lonxml::counter=$ENV{'form.counter'};
943: $Apache::lonxml::counter_changed=0;
944: } else {
945: $Apache::lonxml::counter=1;
946: $Apache::lonxml::counter_changed=1;
947: }
948: }
949:
950: sub store_counter {
951: &Apache::lonnet::appenv(('form.counter' => $Apache::lonxml::counter));
952: return '';
953: }
954:
955: sub get_all_text {
956: my($tag,$pars,$style)= @_;
957: &Apache::lonxml::debug("Got a ".ref($pars));
958: my $gotfullstack=1;
959: if (ref($pars) ne 'ARRAY') {
960: $gotfullstack=0;
961: $pars=[$pars];
962: }
963: &Apache::lonxml::debug("Got a ".ref($style));
964: if (ref($style) ne 'HASH') {
965: $style={};
966: } else {
967: &Apache::lonhomework::showhash(%$style);
968: }
969: my $depth=0;
970: my $token;
971: my $result='';
972: if ( $tag =~ m:^/: ) {
973: my $tag=substr($tag,1);
974: #&Apache::lonxml::debug("have:$tag:");
975: my $top_empty=0;
976: while (($depth >=0) && ($#$pars > -1) && (!$top_empty)) {
977: while (($depth >=0) && ($token = $$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] =~ /^$tag$/i) { $depth++; }
985: if ($token->[1] =~ /^LONCAPA_INTERNAL_TURN_STYLE_ON$/i) { $Apache::lonxml::usestyle=1; }
986: if ($token->[1] =~ /^LONCAPA_INTERNAL_TURN_STYLE_OFF$/i) { $Apache::lonxml::usestyle=0; }
987: $result.=$token->[4];
988: } elsif ($token->[0] eq 'E') {
989: if ( $token->[1] =~ /^$tag$/i) { $depth--; }
990: #skip sending back the last end tag
991: if ($depth == 0 && exists($$style{'/'.$token->[1]})) {
992: my $string=
993: '<LONCAPA_INTERNAL_TURN_STYLE_OFF end="yes" />'.
994: $$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 ( $token->[1] =~ /^$tag$/i) {
1037: $$pars[-1]->unget_token($token); last;
1038: } else {
1039: $result.=$token->[4];
1040: }
1041: if ($token->[1] =~ /^LONCAPA_INTERNAL_TURN_STYLE_ON$/i) { $Apache::lonxml::usestyle=1; }
1042: if ($token->[1] =~ /^LONCAPA_INTERNAL_TURN_STYLE_OFF$/i) { $Apache::lonxml::usestyle=0; }
1043: } elsif ($token->[0] eq 'E') {
1044: $result.=$token->[2];
1045: }
1046: }
1047: if (($#$pars > 0) ) {
1048: pop(@$pars);
1049: pop(@Apache::lonxml::pwd);
1050: } else { last; }
1051: }
1052: }
1053: #&Apache::lonxml::debug("Exit:$result:");
1054: return $result
1055: }
1056:
1057: sub newparser {
1058: my ($parser,$contentref,$dir) = @_;
1059: push (@$parser,HTML::LCParser->new($contentref));
1060: $$parser['-1']->xml_mode('1');
1061: if ( $dir eq '' ) {
1062: push (@Apache::lonxml::pwd, $Apache::lonxml::pwd[$#Apache::lonxml::pwd]);
1063: } else {
1064: push (@Apache::lonxml::pwd, $dir);
1065: }
1066: }
1067:
1068: sub parstring {
1069: my ($token) = @_;
1070: my $temp='';
1071: foreach (@{$token->[3]}) {
1072: unless ($_=~/\W/) {
1073: my $val=$token->[2]->{$_};
1074: $val =~ s/([\%\@\\\"\'])/\\$1/g;
1075: #if ($val =~ m/^[\%\@]/) { $val="\\".$val; }
1076: $temp .= "my \$$_=\"$val\";";
1077: }
1078: }
1079: return $temp;
1080: }
1081:
1082: sub writeallows {
1083: unless ($#extlinks>=0) { return; }
1084: my $thisurl='/res/'.&Apache::lonnet::declutter(shift);
1085: if ($ENV{'httpref.'.$thisurl}) {
1086: $thisurl=$ENV{'httpref.'.$thisurl};
1087: }
1088: my $thisdir=$thisurl;
1089: $thisdir=~s/\/[^\/]+$//;
1090: my %httpref=();
1091: foreach (@extlinks) {
1092: $httpref{'httpref.'.
1093: &Apache::lonnet::hreflocation($thisdir,$_)}=$thisurl;
1094: }
1095: @extlinks=();
1096: &Apache::lonnet::appenv(%httpref);
1097: }
1098:
1099: #
1100: # Afterburner handles anchors, highlights and links
1101: #
1102: sub afterburn {
1103: my $result=shift;
1104: &Apache::loncommon::get_unprocessed_cgi($ENV{'QUERY_STRING'},
1105: ['highlight','anchor','link']);
1106: if ($ENV{'form.highlight'}) {
1107: foreach (split(/\,/,$ENV{'form.highlight'})) {
1108: my $anchorname=$_;
1109: my $matchthis=$anchorname;
1110: $matchthis=~s/\_+/\\s\+/g;
1111: $result=~s/($matchthis)/\<font color=\"red\"\>$1\<\/font\>/gs;
1112: }
1113: }
1114: if ($ENV{'form.link'}) {
1115: foreach (split(/\,/,$ENV{'form.link'})) {
1116: my ($anchorname,$linkurl)=split(/\>/,$_);
1117: my $matchthis=$anchorname;
1118: $matchthis=~s/\_+/\\s\+/g;
1119: $result=~s/($matchthis)/\<a href=\"$linkurl\"\>$1\<\/a\>/gs;
1120: }
1121: }
1122: if ($ENV{'form.anchor'}) {
1123: my $anchorname=$ENV{'form.anchor'};
1124: my $matchthis=$anchorname;
1125: $matchthis=~s/\_+/\\s\+/g;
1126: $result=~s/($matchthis)/\<a name=\"$anchorname\"\>$1\<\/a\>/s;
1127: $result.=(<<"ENDSCRIPT");
1128: <script type="text/javascript">
1129: document.location.hash='$anchorname';
1130: </script>
1131: ENDSCRIPT
1132: }
1133: return $result;
1134: }
1135:
1136: sub storefile {
1137: my ($file,$contents)=@_;
1138: if (my $fh=Apache::File->new('>'.$file)) {
1139: print $fh $contents;
1140: $fh->close();
1141: return 1;
1142: } else {
1143: &warning("Unable to save file $file");
1144: return 0;
1145: }
1146: }
1147:
1148: sub createnewhtml {
1149: my $filecontents=(<<SIMPLECONTENT);
1150: <html>
1151: <head>
1152: <title>
1153: Title of Document Goes Here
1154: </title>
1155: </head>
1156: <body bgcolor="#FFFFFF">
1157:
1158: Body of Document Goes Here
1159:
1160: </body>
1161: </html>
1162: SIMPLECONTENT
1163: return $filecontents;
1164: }
1165:
1166:
1167: sub inserteditinfo {
1168: my ($result,$filecontents)=@_;
1169: $filecontents = &HTML::Entities::encode($filecontents);
1170: # my $editheader='<a href="#editsection">Edit below</a><hr />';
1171: my $xml_help = Apache::loncommon::helpLatexCheatsheet();
1172: my $titledisplay=&display_title();
1173: my $buttons=(<<BUTTONS);
1174: <input type="submit" name="attemptclean"
1175: value="Save and then attempt to clean HTML" />
1176: <input type="submit" name="savethisfile" value="Save this" />
1177: <input type="submit" name="viewmode" value="View" />
1178: BUTTONS
1179: my $editfooter=(<<ENDFOOTER);
1180: <hr />
1181: <a name="editsection" />
1182: <form method="post">
1183: $xml_help
1184: <input type="hidden" name="editmode" value="Edit" />
1185: $buttons<br />
1186: <textarea cols="80" rows="40" name="filecont">$filecontents</textarea>
1187: <br />$buttons
1188: <br />
1189: </form>
1190: $titledisplay
1191: ENDFOOTER
1192: # $result=~s/(\<body[^\>]*\>)/$1$editheader/is;
1193: $result=~s/(\<\/body\>)/$editfooter/is;
1194: return $result;
1195: }
1196:
1197: sub get_target {
1198: my $viewgrades=&Apache::lonnet::allowed('vgr',$ENV{'request.course.id'});
1199: if ( $ENV{'request.state'} eq 'published') {
1200: if ( defined($ENV{'form.grade_target'})
1201: && ($viewgrades == 'F' )) {
1202: return ($ENV{'form.grade_target'});
1203: } elsif (defined($ENV{'form.grade_target'})) {
1204: if (($ENV{'form.grade_target'} eq 'web') ||
1205: ($ENV{'form.grade_target'} eq 'tex') ) {
1206: return $ENV{'form.grade_target'}
1207: } else {
1208: return 'web';
1209: }
1210: } else {
1211: return 'web';
1212: }
1213: } elsif ($ENV{'request.state'} eq 'construct') {
1214: if ( defined($ENV{'form.grade_target'})) {
1215: return ($ENV{'form.grade_target'});
1216: } else {
1217: return 'web';
1218: }
1219: } else {
1220: return 'web';
1221: }
1222: }
1223:
1224: sub handler {
1225: my $request=shift;
1226:
1227: my $target=&get_target();
1228:
1229: $Apache::lonxml::debug=$ENV{'user.debug'};
1230:
1231: if ($ENV{'browser.mathml'}) {
1232: $request->content_type('text/xml');
1233: } else {
1234: $request->content_type('text/html');
1235: }
1236: &Apache::loncommon::no_cache($request);
1237: $request->send_http_header;
1238:
1239: return OK if $request->header_only;
1240:
1241:
1242: my $file=&Apache::lonnet::filelocation("",$request->uri);
1243: #
1244: # Edit action? Save file.
1245: #
1246: unless ($ENV{'request.state'} eq 'published') {
1247: if (($ENV{'form.savethisfile'}) || ($ENV{'form.attemptclean'})) {
1248: if (&storefile($file,$ENV{'form.filecont'})) {
1249: $request->print("<font COLOR=\"#0000FF\">Updated: ". strftime("%d %b %H:%M:%S",localtime())." </font>");
1250: }
1251: }
1252: }
1253: my %mystyle;
1254: my $result = '';
1255: my $filecontents=&Apache::lonnet::getfile($file);
1256: if ($filecontents eq -1) {
1257: $result=(<<ENDNOTFOUND);
1258: <html>
1259: <head>
1260: <title>File not found</title>
1261: </head>
1262: <body bgcolor="#FFFFFF">
1263: <b>File not found: $file</b>
1264: </body>
1265: </html>
1266: ENDNOTFOUND
1267: $filecontents='';
1268: if ($ENV{'request.state'} ne 'published') {
1269: $filecontents=&createnewhtml();
1270: $ENV{'form.editmode'}='Edit'; #force edit mode
1271: }
1272: } else {
1273: unless ($ENV{'request.state'} eq 'published') {
1274: if ($ENV{'form.attemptclean'}) {
1275: $filecontents=&htmlclean($filecontents,1);
1276: }
1277: #
1278: # we are in construction space, see if edit mode forced
1279: &Apache::loncommon::get_unprocessed_cgi
1280: ($ENV{'QUERY_STRING'},['editmode']);
1281: }
1282: if (!$ENV{'form.editmode'} || $ENV{'form.viewmode'}) {
1283: $result = &Apache::lonxml::xmlparse($request,$target,$filecontents,
1284: '',%mystyle);
1285: }
1286: }
1287:
1288: #
1289: # Edit action? Insert editing commands
1290: #
1291: unless ($ENV{'request.state'} eq 'published') {
1292: if ($ENV{'form.editmode'} && (!($ENV{'form.viewmode'}))) {
1293: my $displayfile=$request->uri;
1294: $displayfile=~s/^\/[^\/]*//;
1295: $result='<html><body bgcolor="#FFFFFF"><h3>'.$displayfile.
1296: '</h3></body></html>';
1297: $result=&inserteditinfo($result,$filecontents);
1298: }
1299: }
1300:
1301: writeallows($request->uri);
1302:
1303:
1304: $request->print($result);
1305:
1306: return OK;
1307: }
1308:
1309: sub display_title {
1310: my $result;
1311: if ($ENV{'request.state'} eq 'construct') {
1312: my $title=&Apache::lonnet::gettitle();
1313: if (!defined($title) || $title eq '') {
1314: $title = $ENV{'request.filename'};
1315: $title = substr($title, rindex($title, '/') + 1);
1316: }
1317: $result = "<script type='text/javascript'>top.document.title = '$title - LON-CAPA Construction Space';</script>";
1318: }
1319: return $result;
1320: }
1321:
1322: sub debug {
1323: if ($Apache::lonxml::debug eq 1) {
1324: $|=1;
1325: print('<font size="-2"<pre>DEBUG:'.&HTML::Entities::encode($_[0])."</pre></font>\n");
1326: }
1327: }
1328:
1329: sub error {
1330: $errorcount++;
1331: if (($Apache::lonxml::debug eq 1) || ($ENV{'request.state'} eq 'construct') ) {
1332: # If printing in construction space, put the error inside <pre></pre>
1333: print "<b>ERROR:</b>".join("\n",@_)."\n";
1334: } else {
1335: print "<b>An Error occured while processing this resource. The instructor has been notified.</b> <br />";
1336: #notify author
1337: &Apache::lonmsg::author_res_msg($ENV{'request.filename'},join('<br />',@_));
1338: #notify course
1339: if ( $ENV{'request.course.id'} ) {
1340: my (undef,%users)=&Apache::lonfeedback::decide_receiver(undef,0,1,1,1);
1341: my $declutter=&Apache::lonnet::declutter($ENV{'request.filename'});
1342: foreach (keys %users) {
1343: my ($user,$domain) = split(/:/, $_);
1344: &Apache::lonmsg::user_normal_msg($user,$domain,
1345: "Error [$declutter]",join('<br />',@_));
1346: }
1347: }
1348:
1349: #FIXME probably shouldn't have me get everything forever.
1350: &Apache::lonmsg::user_normal_msg('albertel','msu',"Error in $ENV{'request.filename'}",join('<br />',@_));
1351: #&Apache::lonmsg::user_normal_msg('albertel','103',"Error in $ENV{'request.filename'}",$_[0]);
1352: }
1353: }
1354:
1355: sub warning {
1356: $warningcount++;
1357:
1358: if ($ENV{'form.grade_target'} ne 'tex') {
1359: if ($ENV{'request.state'} eq 'construct' || $Apache::lonxml::debug) {
1360: print "<b>W</b>ARNING<b>:</b>".join('<br />',@_)."<br />\n";
1361: }
1362: }
1363: }
1364:
1365: sub get_param {
1366: my ($param,$parstack,$safeeval,$context,$case_insensitive) = @_;
1367: if ( ! $context ) { $context = -1; }
1368: my $args ='';
1369: if ( $#$parstack > (-2-$context) ) { $args=$$parstack[$context]; }
1370: if ( ! $args ) { return undef; }
1371: if ( $case_insensitive ) {
1372: if ($args =~ s/(my \$)(\Q$param\E)(=\")/$1.lc($2).$3/ei) {
1373: return &Apache::run::run("{$args;".'return $'.$param.'}',
1374: $safeeval); #'
1375: } else {
1376: return undef;
1377: }
1378: } else {
1379: if ( $args =~ /my \$\Q$param\E=\"/ ) {
1380: return &Apache::run::run("{$args;".'return $'.$param.'}',
1381: $safeeval); #'
1382: } else {
1383: return undef;
1384: }
1385: }
1386: }
1387:
1388: sub get_param_var {
1389: my ($param,$parstack,$safeeval,$context,$case_insensitive) = @_;
1390: if ( ! $context ) { $context = -1; }
1391: my $args ='';
1392: if ( $#$parstack > (-2-$context) ) { $args=$$parstack[$context]; }
1393: &Apache::lonxml::debug("Args are $args param is $param");
1394: if ($case_insensitive) {
1395: if (! ($args=~s/(my \$)(\Q$param\E)(=\")/$1.lc($2).$3/ei)) {
1396: return undef;
1397: }
1398: } elsif ( $args !~ /my \$\Q$param\E=\"/ ) { return undef; }
1399: my $value=&Apache::run::run("{$args;".'return $'.$param.'}',$safeeval); #'
1400: &Apache::lonxml::debug("first run is $value");
1401: if ($value =~ /^[\$\@\%]\w+$/) {
1402: &Apache::lonxml::debug("doing second");
1403: my @result=&Apache::run::run("return $value",$safeeval,1);
1404: if (!defined($result[0])) {
1405: return $value
1406: } else {
1407: if (wantarray) { return @result; } else { return $result[0]; }
1408: }
1409: } else {
1410: return $value;
1411: }
1412: }
1413:
1414: sub register_insert {
1415: my @data = split /\n/, &Apache::lonnet::getfile('/home/httpd/lonTabs/insertlist.tab');
1416: my $i;
1417: my $tagnum=0;
1418: my @order;
1419: for ($i=0;$i < $#data; $i++) {
1420: my $line = $data[$i];
1421: if ( $line =~ /^\#/ || $line =~ /^\s*\n/) { next; }
1422: if ( $line =~ /TABLE/ ) { last; }
1423: my ($tag,$descrip,$color,$function,$show,$helpfile,$helpdesc) = split(/,/, $line);
1424: if ($tag) {
1425: $insertlist{"$tagnum.tag"} = $tag;
1426: $insertlist{"$tagnum.description"} = $descrip;
1427: $insertlist{"$tagnum.color"} = $color;
1428: $insertlist{"$tagnum.function"} = $function;
1429: if (!defined($show)) { $show='yes'; }
1430: $insertlist{"$tagnum.show"}= $show;
1431: $insertlist{"$tagnum.helpfile"} = $helpfile;
1432: $insertlist{"$tagnum.helpdesc"} = $helpdesc;
1433: $insertlist{"$tag.num"}=$tagnum;
1434: $tagnum++;
1435: }
1436: }
1437: $i++; #skipping TABLE line
1438: $tagnum = 0;
1439: for (;$i < $#data;$i++) {
1440: my $line = $data[$i];
1441: my ($mnemonic,@which) = split(/ +/,$line);
1442: my $tag = $insertlist{"$tagnum.tag"};
1443: for (my $j=0;$j <=$#which;$j++) {
1444: if ( $which[$j] eq 'Y' ) {
1445: if ($insertlist{"$j.show"} ne 'no') {
1446: push(@{ $insertlist{"$tag.which"} },$j);
1447: }
1448: }
1449: }
1450: $tagnum++;
1451: }
1452: }
1453:
1454: sub description {
1455: my ($token)=@_;
1456: my $tagnum;
1457: my $tag=$token->[1];
1458: foreach my $namespace (reverse @Apache::lonxml::namespace) {
1459: my $testtag=$namespace.'::'.$tag;
1460: $tagnum=$insertlist{"$testtag.num"};
1461: if (defined($tagnum)) { last; }
1462: }
1463: if (!defined ($tagnum)) { $tagnum=$Apache::lonxml::insertlist{"$tag.num"}; }
1464: return $insertlist{$tagnum.'.description'};
1465: }
1466:
1467: # Returns a list containing the help file, and the description
1468: sub helpinfo {
1469: my ($token)=@_;
1470: my $tagnum;
1471: my $tag=$token->[1];
1472: foreach my $namespace (reverse @Apache::lonxml::namespace) {
1473: my $testtag=$namespace.'::'.$tag;
1474: $tagnum=$insertlist{"$testtag.num"};
1475: if (defined($tagnum)) { last; }
1476: }
1477: if (!defined ($tagnum)) { $tagnum=$Apache::lonxml::insertlist{"$tag.num"}; }
1478: return ($insertlist{$tagnum.'.helpfile'}, $insertlist{$tagnum.'.helpdesc'});
1479: }
1480:
1481: # ----------------------------------------------------------------- whichuser
1482: # returns a list of $symb, $courseid, $domain, $name that is correct for
1483: # calls to lonnet functions for this setup.
1484: # - looks for form.grade_ parameters
1485: sub whichuser {
1486: my ($passedsymb)=@_;
1487: my ($symb,$courseid,$domain,$name,$publicuser);
1488: if (defined($ENV{'form.grade_symb'})) {
1489: my $tmp_courseid=$ENV{'form.grade_courseid'};
1490: my $allowed=&Apache::lonnet::allowed('vgr',$tmp_courseid);
1491: if ($allowed) {
1492: $symb=$ENV{'form.grade_symb'};
1493: $courseid=$ENV{'form.grade_courseid'};
1494: $domain=$ENV{'form.grade_domain'};
1495: $name=$ENV{'form.grade_username'};
1496: }
1497: } else {
1498: if (!$passedsymb) {
1499: $symb=&Apache::lonnet::symbread();
1500: } else {
1501: $symb=$passedsymb;
1502: }
1503: $courseid=$ENV{'request.course.id'};
1504: $domain=$ENV{'user.domain'};
1505: $name=$ENV{'user.name'};
1506: if ($name eq 'public' && $domain eq 'public') {
1507: if (!defined($ENV{'form.username'})) {
1508: $ENV{'form.username'}.=time.rand(10000000);
1509: }
1510: $name.=$ENV{'form.username'};
1511: }
1512: }
1513: return ($symb,$courseid,$domain,$name,$publicuser);
1514: }
1515:
1516: 1;
1517: __END__
1518:
1519:
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