1: # The LearningOnline Network with CAPA
2: # XML Parser Module
3: #
4: # $Id: lonxml.pm,v 1.260 2003/05/29 18:42:22 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 $warningcount);
63: use strict;
64: use HTML::LCParser();
65: use HTML::TreeBuilder();
66: use HTML::Entities();
67: use Safe();
68: use Safe::Hole();
69: use Math::Cephes();
70: use Math::Random();
71: use Opcode();
72:
73: sub register {
74: my ($space,@taglist) = @_;
75: foreach my $temptag (@taglist) {
76: push(@{ $Apache::lonxml::alltags{$temptag} },$space);
77: }
78: }
79:
80: sub deregister {
81: my ($space,@taglist) = @_;
82: foreach my $temptag (@taglist) {
83: my $tempspace = $Apache::lonxml::alltags{$temptag}[-1];
84: if ($tempspace eq $space) {
85: pop(@{ $Apache::lonxml::alltags{$temptag} });
86: }
87: }
88: #&printalltags();
89: }
90:
91: use Apache::Constants qw(:common);
92: use Apache::lontexconvert();
93: use Apache::style();
94: use Apache::run();
95: use Apache::londefdef();
96: use Apache::scripttag();
97: use Apache::edit();
98: use Apache::lonnet();
99: use Apache::File();
100: use Apache::loncommon();
101: use Apache::lonfeedback();
102: use Apache::lonmsg();
103: use Apache::loncacc();
104:
105: #================================================== Main subroutine: xmlparse
106: #debugging control, to turn on debugging modify the correct handler
107: $Apache::lonxml::debug=0;
108:
109: # keeps count of the number of warnings and errors generated in a parse
110: $warningcount=0;
111: $errorcount=0;
112:
113: #path to the directory containing the file currently being processed
114: @pwd=();
115:
116: #these two are used for capturing a subset of the output for later processing,
117: #don't touch them directly use &startredirection and &endredirection
118: @outputstack = ();
119: $redirection = 0;
120:
121: #controls wheter the <import> tag actually does
122: $import = 1;
123: @extlinks=();
124:
125: # meta mode is a bit weird only some output is to be turned off
126: #<output> tag turns metamode off (defined in londefdef.pm)
127: $metamode = 0;
128:
129: # turns on and of run::evaluate actually derefencing var refs
130: $evaluate = 1;
131:
132: # data structure for eidt mode, determines what tags can go into what other tags
133: %insertlist=();
134:
135: # stores the list of active tag namespaces
136: @namespace=();
137:
138: # if 0 all high ASCII characters will be encoded into HTML Entities
139: $prevent_entity_encode=0;
140:
141: # has the dynamic menu been updated to know about this resource
142: $Apache::lonxml::registered=0;
143:
144: # a pointer the the Apache request object
145: $Apache::lonxml::request='';
146:
147: # a problem number counter, and check on ether it is used
148: $Apache::lonxml::counter=1;
149: $Apache::lonxml::counter_changed=0;
150:
151: #internal check on whether to look at style defs
152: $Apache::lonxml::usestyle=1;
153:
154: #locations used to store the parameter string for style substitutions
155: $Apache::lonxml::style_values='';
156: $Apache::lonxml::style_end_values='';
157:
158: sub xmlbegin {
159: my $output='';
160: if ($ENV{'browser.mathml'}) {
161: $output='<?xml version="1.0"?>'
162: .'<?xml-stylesheet type="text/css" href="/adm/MathML/mathml.css"?>'
163: .'<!DOCTYPE html SYSTEM "/adm/MathML/mathml.dtd" '
164: .'[<!ENTITY mathns "http://www.w3.org/1998/Math/MathML">]>'
165: .'<html xmlns:math="http://www.w3.org/1998/Math/MathML" '
166: .'xmlns="http://www.w3.org/TR/REC-html40">';
167: } else {
168: $output='<html>';
169: }
170: return $output;
171: }
172:
173: sub xmlend {
174: my ($discussiononly,$symb)=@_;
175: my $discussion='';
176: if ($ENV{'request.course.id'}) {
177: my $crs='/'.$ENV{'request.course.id'};
178: if ($ENV{'request.course.sec'}) {
179: $crs.='_'.$ENV{'request.course.sec'};
180: }
181: $crs=~s/\_/\//g;
182: my $seeid=&Apache::lonnet::allowed('rin',$crs);
183: unless ($symb) {
184: $symb=&Apache::lonnet::symbread();
185: }
186: if ($symb) {
187: my %contrib=&Apache::lonnet::restore($symb,$ENV{'request.course.id'},
188: $ENV{'course.'.$ENV{'request.course.id'}.'.domain'},
189: $ENV{'course.'.$ENV{'request.course.id'}.'.num'});
190: if ($contrib{'version'}) {
191: unless ($discussiononly) {
192: $discussion.=
193: '<address><hr />';
194: }
195: my $idx;
196: for ($idx=1;$idx<=$contrib{'version'};$idx++) {
197: my $hidden=($contrib{'hidden'}=~/\.$idx\./);
198: my $deleted=($contrib{'deleted'}=~/\.$idx\./);
199: unless ((($hidden) && (!$seeid)) || ($deleted)) {
200: my $message=$contrib{$idx.':message'};
201: $message=~s/\n/\<br \/\>/g;
202: $message=&Apache::lontexconvert::msgtexconverted($message);
203: if ($contrib{$idx.':attachmenturl'}) {
204: my ($fname,$ft)
205: =($contrib{$idx.':attachmenturl'}=~/\/(\w+)\.(\w+)$/);
206: $message.='<p>Attachment: <a href="'.
207: &Apache::lonnet::tokenwrapper($contrib{$idx.':attachmenturl'}).
208: '"><tt>'.$fname.'.'.$ft.'</tt></a>';
209: }
210: if ($message) {
211: if ($hidden) {
212: $message='<font color="#888888">'.$message.'</font>';
213: }
214: my $screenname=&Apache::loncommon::screenname(
215: $contrib{$idx.':sendername'},
216: $contrib{$idx.':senderdomain'});
217: my $plainname=&Apache::loncommon::nickname(
218: $contrib{$idx.':sendername'},
219: $contrib{$idx.':senderdomain'});
220:
221: my $sender='Anonymous';
222: if ((!$contrib{$idx.':anonymous'}) || ($seeid)) {
223: $sender=&Apache::loncommon::aboutmewrapper(
224: $plainname,
225: $contrib{$idx.':sendername'},
226: $contrib{$idx.':senderdomain'}).' ('.
227: $contrib{$idx.':sendername'}.' at '.
228: $contrib{$idx.':senderdomain'}.')';
229: if ($contrib{$idx.':anonymous'}) {
230: $sender.=' [anonymous] '.
231: $screenname;
232: }
233: if ($seeid) {
234: if ($hidden) {
235: $sender.=' <a href="/adm/feedback?unhide='.
236: $symb.':::'.$idx.'">Make Visible</a>';
237: } else {
238: $sender.=' <a href="/adm/feedback?hide='.
239: $symb.':::'.$idx.'">Hide</a>';
240: }
241: $sender.=' <a href="/adm/feedback?deldisc='.
242: $symb.':::'.$idx.'">Delete</a>';
243: }
244: } else {
245: if ($screenname) {
246: $sender='<i>'.$screenname.'</i>';
247: }
248: }
249: $discussion.='<p><b>'.$sender.'</b> ('.
250: localtime($contrib{$idx.':timestamp'}).
251: '):<blockquote>'.$message.
252: '</blockquote></p>';
253: }
254: }
255: }
256: unless ($discussiononly) {
257: $discussion.='</address>';
258: }
259: }
260: if ($discussiononly) {
261: $discussion.=(<<ENDDISCUSS);
262: <form action="/adm/feedback" method="post" name="mailform" enctype="multipart/form-data">
263: <input type="submit" name="discuss" value="Post Discussion" />
264: <input type="submit" name="anondiscuss" value="Post Anonymous Discussion" />
265: <input type="hidden" name="symb" value="$symb" />
266: <input type="hidden" name="sendit" value="true" />
267: <br />
268: <font size="1">Note: in anonymous discussion, your name is visible only to
269: course faculty</font><br />
270: <textarea name=comment cols=60 rows=10 wrap=hard></textarea>
271: <p>
272: Attachment (128 KB max size): <input type="file" name="attachment" />
273: </p>
274: </form>
275: ENDDISCUSS
276: $discussion.=&Apache::lonfeedback::generate_preview_button();
277: }
278: }
279: }
280: return $discussion.($discussiononly?'':'</html>');
281: }
282:
283: sub tokeninputfield {
284: my $defhost=$Apache::lonnet::perlvar{'lonHostID'};
285: $defhost=~tr/a-z/A-Z/;
286: return (<<ENDINPUTFIELD)
287: <script type="text/javascript">
288: function updatetoken() {
289: var comp=new Array;
290: var barcode=unescape(document.tokeninput.barcode.value);
291: comp=barcode.split('*');
292: if (typeof(comp[0])!="undefined") {
293: document.tokeninput.codeone.value=comp[0];
294: }
295: if (typeof(comp[1])!="undefined") {
296: document.tokeninput.codetwo.value=comp[1];
297: }
298: if (typeof(comp[2])!="undefined") {
299: comp[2]=comp[2].toUpperCase();
300: document.tokeninput.codethree.value=comp[2];
301: }
302: document.tokeninput.barcode.value='';
303: }
304: </script>
305: <form method="post" name="tokeninput">
306: <table border="2" bgcolor="#FFFFBB">
307: <tr><th>DocID Checkin</th></tr>
308: <tr><td>
309: <table>
310: <tr>
311: <td>Scan in Barcode</td>
312: <td><input type="text" size="22" name="barcode"
313: onChange="updatetoken()"/></td>
314: </tr>
315: <tr><td><i>or</i> Type in DocID</td>
316: <td>
317: <input type="text" size="5" name="codeone" />
318: <b><font size="+2">*</font></b>
319: <input type="text" size="5" name="codetwo" />
320: <b><font size="+2">*</font></b>
321: <input type="text" size="10" name="codethree" value="$defhost"
322: onChange="this.value=this.value.toUpperCase()" />
323: </td></tr>
324: </table>
325: </td></tr>
326: <tr><td><input type="submit" value="Check in DocID" /></td></tr>
327: </table>
328: </form>
329: ENDINPUTFIELD
330: }
331:
332: sub maketoken {
333: my ($symb,$tuname,$tudom,$tcrsid)=@_;
334: unless ($symb) {
335: $symb=&Apache::lonnet::symbread();
336: }
337: unless ($tuname) {
338: $tuname=$ENV{'user.name'};
339: $tudom=$ENV{'user.domain'};
340: $tcrsid=$ENV{'request.course.id'};
341: }
342:
343: return &Apache::lonnet::checkout($symb,$tuname,$tudom,$tcrsid);
344: }
345:
346: sub printtokenheader {
347: my ($target,$token,$tsymb,$tcrsid,$tudom,$tuname)=@_;
348: unless ($token) { return ''; }
349:
350: my ($symb,$courseid,$domain,$name) = &Apache::lonxml::whichuser();
351: unless ($tsymb) {
352: $tsymb=$symb;
353: }
354: unless ($tuname) {
355: $tuname=$name;
356: $tudom=$domain;
357: $tcrsid=$courseid;
358: }
359:
360: my %reply=&Apache::lonnet::get('environment',
361: ['firstname','middlename','lastname','generation'],
362: $tudom,$tuname);
363: my $plainname=$reply{'firstname'}.' '.
364: $reply{'middlename'}.' '.
365: $reply{'lastname'}.' '.
366: $reply{'generation'};
367:
368: if ($target eq 'web') {
369: my %idhash=&Apache::lonnet::idrget($tudom,($tuname));
370: return
371: '<img align="right" src="/cgi-bin/barcode.png?encode='.$token.'" />'.
372: 'Checked out for '.$plainname.
373: '<br />User: '.$tuname.' at '.$tudom.
374: '<br />ID: '.$idhash{$tuname}.
375: '<br />CourseID: '.$tcrsid.
376: '<br />Course: '.$ENV{'course.'.$tcrsid.'.description'}.
377: '<br />DocID: '.$token.
378: '<br />Time: '.localtime().'<hr />';
379: } else {
380: return $token;
381: }
382: }
383:
384: sub fontsettings() {
385: my $headerstring='';
386: if (($ENV{'browser.os'} eq 'mac') && (!$ENV{'browser.mathml'})) {
387: $headerstring.=
388: '<meta Content-Type="text/html; charset=x-mac-roman">';
389: } elsif (!$ENV{'browser.mathml'}) {
390: $headerstring.=
391: '<meta http-equiv="Content-Type" content="text/html; charset=utf-8" />';
392: }
393: return $headerstring;
394: }
395:
396: sub printalltags {
397: my $temp;
398: foreach $temp (sort keys %Apache::lonxml::alltags) {
399: &Apache::lonxml::debug("$temp -- ".
400: join(',',@{ $Apache::lonxml::alltags{$temp} }));
401: }
402: }
403:
404: sub xmlparse {
405: my ($request,$target,$content_file_string,$safeinit,%style_for_target) = @_;
406:
407: &setup_globals($request,$target);
408: &Apache::inputtags::initialize_inputtags();
409: &Apache::outputtags::initialize_outputtags();
410: &Apache::edit::initialize_edit();
411:
412: #
413: # do we have a course style file?
414: #
415:
416: if ($ENV{'request.course.id'} && $ENV{'request.state'} ne 'construct') {
417: my $bodytext=
418: $ENV{'course.'.$ENV{'request.course.id'}.'.default_xml_style'};
419: if ($bodytext) {
420: my $location=&Apache::lonnet::filelocation('',$bodytext);
421: my $styletext=&Apache::lonnet::getfile($location);
422: if ($styletext ne '-1') {
423: %style_for_target = (%style_for_target,
424: &Apache::style::styleparser($target,$styletext));
425: }
426: }
427: }
428: #&printalltags();
429: my @pars = ();
430: my $pwd=$ENV{'request.filename'};
431: $pwd =~ s:/[^/]*$::;
432: &newparser(\@pars,\$content_file_string,$pwd);
433:
434: my $safeeval = new Safe;
435: my $safehole = new Safe::Hole;
436: &init_safespace($target,$safeeval,$safehole,$safeinit);
437: #-------------------- Redefinition of the target in the case of compound target
438:
439: ($target, my @tenta) = split('&&',$target);
440:
441: my @stack = ();
442: my @parstack = ();
443: &initdepth;
444:
445: my $finaloutput = &inner_xmlparse($target,\@stack,\@parstack,\@pars,
446: $safeeval,\%style_for_target);
447:
448: if ($ENV{'request.uri'}) {
449: &writeallows($ENV{'request.uri'});
450: }
451: if ($Apache::lonxml::counter_changed) { &store_counter() }
452: return $finaloutput;
453: }
454:
455: sub htmlclean {
456: my ($raw,$full)=@_;
457:
458: my $tree = HTML::TreeBuilder->new;
459: $tree->ignore_unknown(0);
460:
461: $tree->parse($raw);
462:
463: my $output= $tree->as_HTML(undef,' ');
464:
465: $output=~s/\<(br|hr|img|meta|allow)(.*?)\>/\<$1$2 \/\>/gis;
466: $output=~s/\<\/(br|hr|img|meta|allow)\>//gis;
467: unless ($full) {
468: $output=~s/\<[\/]*(body|head|html)\>//gis;
469: }
470:
471: $tree = $tree->delete;
472:
473: return $output;
474: }
475:
476: sub latex_special_symbols {
477: my ($current_token,$stack,$parstack,$where)=@_;
478: if ($where eq 'header') {
479: $current_token =~ s/(\\|_|\^)/ /g;
480: $current_token =~ s/(\$|%|\#|&|\{|\})/\\$1/g;
481: } else {
482: $current_token=~s/\\ /\\char92 /g;
483: $current_token=~s/\^/\\char94 /g;
484: $current_token=~s/\~/\\char126 /g;
485: $current_token=~s/(&[^A-Za-z\#])/\\$1/g;
486: $current_token=~s/([^&])\#/$1\\#/g;
487: $current_token=~s/(\$|_|{|})/\\$1/g;
488: $current_token=~s/\\char92 /\\texttt{\\char92}/g;
489: $current_token=~s/(>|<)/\$$1\$/g; #more or less
490: if ($current_token=~m/\d%/) {$current_token =~ s/(\d)%/$1\\%/g;} #percent after digit
491: if ($current_token=~m/\s%/) {$current_token =~ s/(\s)%/$1\\%/g;} #persent after space
492: }
493: return $current_token;
494: }
495:
496: sub inner_xmlparse {
497: my ($target,$stack,$parstack,$pars,$safeeval,$style_for_target)=@_;
498: my $finaloutput = '';
499: my $result;
500: my $token;
501: my $dontpop=0;
502: while ( $#$pars > -1 ) {
503: while ($token = $$pars['-1']->get_token) {
504: if (($token->[0] eq 'T') || ($token->[0] eq 'C') || ($token->[0] eq 'D') ) {
505: if ($metamode<1) {
506: my $text=$token->[1];
507: if ($token->[0] eq 'C' && $target eq 'tex') {
508: $text = '';
509: # $text = '%'.$text."\n";
510: }
511: $result.=$text;
512: }
513: } elsif ($token->[0] eq 'PI') {
514: if ($metamode<1) {
515: $result=$token->[2];
516: }
517: } elsif ($token->[0] eq 'S') {
518: # add tag to stack
519: push (@$stack,$token->[1]);
520: # add parameters list to another stack
521: push (@$parstack,&parstring($token));
522: &increasedepth($token);
523: if ($Apache::lonxml::usestyle &&
524: exists($$style_for_target{$token->[1]})) {
525: $Apache::lonxml::usestyle=0;
526: my $string=$$style_for_target{$token->[1]}.
527: '<LONCAPA_INTERNAL_TURN_STYLE_ON />';
528: &Apache::lonxml::newparser($pars,\$string);
529: $Apache::lonxml::style_values=$$parstack[-1];
530: $Apache::lonxml::style_end_values=$$parstack[-1];
531: } else {
532: $result = &callsub("start_$token->[1]", $target, $token, $stack,
533: $parstack, $pars, $safeeval, $style_for_target);
534: }
535: } elsif ($token->[0] eq 'E') {
536: if ($Apache::lonxml::usestyle &&
537: exists($$style_for_target{'/'."$token->[1]"})) {
538: $Apache::lonxml::usestyle=0;
539: my $string=$$style_for_target{'/'.$token->[1]}.
540: '<LONCAPA_INTERNAL_TURN_STYLE_ON end="'.$token->[1].'" />';
541: &Apache::lonxml::newparser($pars,\$string);
542: $Apache::lonxml::style_values=$Apache::lonxml::style_end_values;
543: $Apache::lonxml::style_end_values='';
544: $dontpop=1;
545: } else {
546: #clear out any tags that didn't end
547: while ($token->[1] ne $$stack['-1'] && ($#$stack > -1)) {
548: my $lasttag=$$stack[-1];
549: if ($token->[1] =~ /^$lasttag$/i) {
550: &Apache::lonxml::warning('Using tag </'.$token->[1].'> on line '.$token->[3].' as end tag to <'.$$stack[-1].'>');
551: last;
552: } else {
553: &Apache::lonxml::warning('Found tag </'.$token->[1].'> on line '.$token->[3].' when looking for </'.$$stack[-1].'> in file');
554: &end_tag($stack,$parstack,$token);
555: }
556: }
557: $result = &callsub("end_$token->[1]", $target, $token, $stack,
558: $parstack, $pars,$safeeval, $style_for_target);
559: }
560: } else {
561: &Apache::lonxml::error("Unknown token event :$token->[0]:$token->[1]:");
562: }
563: #evaluate variable refs in result
564: if ($result ne "") {
565: my $extras;
566: if (!$Apache::lonxml::usestyle) {
567: $extras=$Apache::lonxml::style_values;
568: }
569: if ( $#$parstack > -1 ) {
570: $result=&Apache::run::evaluate($result,$safeeval,$extras.$$parstack[-1]);
571: } else {
572: $result= &Apache::run::evaluate($result,$safeeval,$extras);
573: }
574: }
575: if (($token->[0] eq 'T') || ($token->[0] eq 'C') || ($token->[0] eq 'D') ) {
576: #Style file definitions should be correct
577: if ($target eq 'tex' && ($Apache::lonxml::usestyle)) {
578: $result=&latex_special_symbols($result,$stack,$parstack);
579: }
580: }
581:
582: # Encode any high ASCII characters
583: if (!$Apache::lonxml::prevent_entity_encode) {
584: $result=&HTML::Entities::encode($result,"\200-\377");
585: }
586: if ($Apache::lonxml::redirection) {
587: $Apache::lonxml::outputstack['-1'] .= $result;
588: } else {
589: $finaloutput.=$result;
590: }
591: $result = '';
592:
593: if ($token->[0] eq 'E' && !$dontpop) {
594: &end_tag($stack,$parstack,$token);
595: }
596: $dontpop=0;
597: }
598: if ($#$pars > -1) {
599: pop @$pars;
600: pop @Apache::lonxml::pwd;
601: }
602: }
603:
604: # if ($target eq 'meta') {
605: # $finaloutput.=&endredirection;
606: # }
607:
608:
609: if (($ENV{'QUERY_STRING'}) && ($target eq 'web')) {
610: $finaloutput=&afterburn($finaloutput);
611: }
612: return $finaloutput;
613: }
614:
615: sub callsub {
616: my ($sub,$target,$token,$tagstack,$parstack,$parser,$safeeval,$style)=@_;
617: my $currentstring='';
618: my $nodefault;
619: {
620: my $sub1;
621: no strict 'refs';
622: my $tag=$token->[1];
623: # get utterly rid of extended html tags
624: if ($tag=~/^x\-/i) { return ''; }
625: my $space=$Apache::lonxml::alltags{$tag}[-1];
626: if (!$space) {
627: $tag=~tr/A-Z/a-z/;
628: $sub=~tr/A-Z/a-z/;
629: $space=$Apache::lonxml::alltags{$tag}[-1]
630: }
631:
632: my $deleted=0;
633: $Apache::lonxml::curdepth=join('_',@Apache::lonxml::depthcounter);
634: if (($token->[0] eq 'S') && ($target eq 'modified')) {
635: $deleted=&Apache::edit::handle_delete($space,$target,$token,$tagstack,
636: $parstack,$parser,$safeeval,
637: $style);
638: }
639: if (!$deleted) {
640: if ($space) {
641: #&Apache::lonxml::debug("Calling sub $sub in $space $metamode");
642: $sub1="$space\:\:$sub";
643: ($currentstring,$nodefault) = &$sub1($target,$token,$tagstack,
644: $parstack,$parser,$safeeval,
645: $style);
646: } else {
647: #&Apache::lonxml::debug("NOT Calling sub $sub in $space $metamode");
648: if ($metamode <1) {
649: if (defined($token->[4]) && ($metamode < 1)) {
650: $currentstring = $token->[4];
651: } else {
652: $currentstring = $token->[2];
653: }
654: }
655: }
656: # &Apache::lonxml::debug("nodefalt:$nodefault:");
657: if ($currentstring eq '' && $nodefault eq '') {
658: if ($target eq 'edit') {
659: #&Apache::lonxml::debug("doing default edit for $token->[1]");
660: if ($token->[0] eq 'S') {
661: $currentstring = &Apache::edit::tag_start($target,$token);
662: } elsif ($token->[0] eq 'E') {
663: $currentstring = &Apache::edit::tag_end($target,$token);
664: }
665: } elsif ($target eq 'modified') {
666: if ($token->[0] eq 'S') {
667: $currentstring = $token->[4];
668: $currentstring.=&Apache::edit::handle_insert();
669: } elsif ($token->[0] eq 'E') {
670: $currentstring = $token->[2];
671: $currentstring.=&Apache::edit::handle_insertafter($token->[1]);
672: } else {
673: $currentstring = $token->[2];
674: }
675: }
676: }
677: }
678: use strict 'refs';
679: }
680: return $currentstring;
681: }
682:
683: sub setup_globals {
684: my ($request,$target)=@_;
685: $Apache::lonxml::request=$request;
686: $Apache::lonxml::registered = 0;
687: $errorcount=0;
688: $warningcount=0;
689: $Apache::lonxml::default_homework_loaded=0;
690: $Apache::lonxml::usestyle=1;
691: &init_counter();
692: @Apache::lonxml::pwd=();
693: @Apache::lonxml::extlinks=();
694: if ($target eq 'meta') {
695: $Apache::lonxml::redirection = 0;
696: $Apache::lonxml::metamode = 1;
697: $Apache::lonxml::evaluate = 1;
698: $Apache::lonxml::import = 0;
699: } elsif ($target eq 'answer') {
700: $Apache::lonxml::redirection = 0;
701: $Apache::lonxml::metamode = 1;
702: $Apache::lonxml::evaluate = 1;
703: $Apache::lonxml::import = 1;
704: } elsif ($target eq 'grade') {
705: &startredirection;
706: $Apache::lonxml::metamode = 0;
707: $Apache::lonxml::evaluate = 1;
708: $Apache::lonxml::import = 1;
709: } elsif ($target eq 'modified') {
710: $Apache::lonxml::redirection = 0;
711: $Apache::lonxml::metamode = 0;
712: $Apache::lonxml::evaluate = 0;
713: $Apache::lonxml::import = 0;
714: } elsif ($target eq 'edit') {
715: $Apache::lonxml::redirection = 0;
716: $Apache::lonxml::metamode = 0;
717: $Apache::lonxml::evaluate = 0;
718: $Apache::lonxml::import = 0;
719: } elsif ($target eq 'analyze') {
720: $Apache::lonxml::redirection = 0;
721: $Apache::lonxml::metamode = 0;
722: $Apache::lonxml::evaluate = 1;
723: $Apache::lonxml::import = 1;
724: } else {
725: $Apache::lonxml::redirection = 0;
726: $Apache::lonxml::metamode = 0;
727: $Apache::lonxml::evaluate = 1;
728: $Apache::lonxml::import = 1;
729: }
730: }
731:
732: sub init_safespace {
733: my ($target,$safeeval,$safehole,$safeinit) = @_;
734: $safeeval->permit("entereval");
735: $safeeval->permit(":base_math");
736: $safeeval->permit("sort");
737: $safeeval->deny(":base_io");
738: $safehole->wrap(\&Apache::scripttag::xmlparse,$safeeval,'&xmlparse');
739: $safehole->wrap(\&Apache::outputtags::multipart,$safeeval,'&multipart');
740: $safehole->wrap(\&Apache::lonnet::EXT,$safeeval,'&EXT');
741:
742: $safehole->wrap(\&Math::Cephes::asin,$safeeval,'&asin');
743: $safehole->wrap(\&Math::Cephes::acos,$safeeval,'&acos');
744: $safehole->wrap(\&Math::Cephes::atan,$safeeval,'&atan');
745: $safehole->wrap(\&Math::Cephes::sinh,$safeeval,'&sinh');
746: $safehole->wrap(\&Math::Cephes::cosh,$safeeval,'&cosh');
747: $safehole->wrap(\&Math::Cephes::tanh,$safeeval,'&tanh');
748: $safehole->wrap(\&Math::Cephes::asinh,$safeeval,'&asinh');
749: $safehole->wrap(\&Math::Cephes::acosh,$safeeval,'&acosh');
750: $safehole->wrap(\&Math::Cephes::atanh,$safeeval,'&atanh');
751: $safehole->wrap(\&Math::Cephes::erf,$safeeval,'&erf');
752: $safehole->wrap(\&Math::Cephes::erfc,$safeeval,'&erfc');
753: $safehole->wrap(\&Math::Cephes::j0,$safeeval,'&j0');
754: $safehole->wrap(\&Math::Cephes::j1,$safeeval,'&j1');
755: $safehole->wrap(\&Math::Cephes::jn,$safeeval,'&jn');
756: $safehole->wrap(\&Math::Cephes::jv,$safeeval,'&jv');
757: $safehole->wrap(\&Math::Cephes::y0,$safeeval,'&y0');
758: $safehole->wrap(\&Math::Cephes::y1,$safeeval,'&y1');
759: $safehole->wrap(\&Math::Cephes::yn,$safeeval,'&yn');
760: $safehole->wrap(\&Math::Cephes::yv,$safeeval,'&yv');
761:
762: $safehole->wrap(\&Math::Cephes::bdtr ,$safeeval,'&bdtr' );
763: $safehole->wrap(\&Math::Cephes::bdtrc ,$safeeval,'&bdtrc' );
764: $safehole->wrap(\&Math::Cephes::bdtri ,$safeeval,'&bdtri' );
765: $safehole->wrap(\&Math::Cephes::btdtr ,$safeeval,'&btdtr' );
766: $safehole->wrap(\&Math::Cephes::chdtr ,$safeeval,'&chdtr' );
767: $safehole->wrap(\&Math::Cephes::chdtrc,$safeeval,'&chdtrc');
768: $safehole->wrap(\&Math::Cephes::chdtri,$safeeval,'&chdtri');
769: $safehole->wrap(\&Math::Cephes::fdtr ,$safeeval,'&fdtr' );
770: $safehole->wrap(\&Math::Cephes::fdtrc ,$safeeval,'&fdtrc' );
771: $safehole->wrap(\&Math::Cephes::fdtri ,$safeeval,'&fdtri' );
772: $safehole->wrap(\&Math::Cephes::gdtr ,$safeeval,'&gdtr' );
773: $safehole->wrap(\&Math::Cephes::gdtrc ,$safeeval,'&gdtrc' );
774: $safehole->wrap(\&Math::Cephes::nbdtr ,$safeeval,'&nbdtr' );
775: $safehole->wrap(\&Math::Cephes::nbdtrc,$safeeval,'&nbdtrc');
776: $safehole->wrap(\&Math::Cephes::nbdtri,$safeeval,'&nbdtri');
777: $safehole->wrap(\&Math::Cephes::ndtr ,$safeeval,'&ndtr' );
778: $safehole->wrap(\&Math::Cephes::ndtri ,$safeeval,'&ndtri' );
779: $safehole->wrap(\&Math::Cephes::pdtr ,$safeeval,'&pdtr' );
780: $safehole->wrap(\&Math::Cephes::pdtrc ,$safeeval,'&pdtrc' );
781: $safehole->wrap(\&Math::Cephes::pdtri ,$safeeval,'&pdtri' );
782: $safehole->wrap(\&Math::Cephes::stdtr ,$safeeval,'&stdtr' );
783: $safehole->wrap(\&Math::Cephes::stdtri,$safeeval,'&stdtri');
784:
785: # $safehole->wrap(\&Math::Cephes::new_fract,$safeeval,'&new_fract');
786: # $safehole->wrap(\&Math::Cephes::radd,$safeeval,'&radd');
787: # $safehole->wrap(\&Math::Cephes::rsub,$safeeval,'&rsub');
788: # $safehole->wrap(\&Math::Cephes::rmul,$safeeval,'&rmul');
789: # $safehole->wrap(\&Math::Cephes::rdiv,$safeeval,'&rdiv');
790: # $safehole->wrap(\&Math::Cephes::euclid,$safeeval,'&euclid');
791:
792: $safehole->wrap(\&Math::Random::random_beta,$safeeval,'&math_random_beta');
793: $safehole->wrap(\&Math::Random::random_chi_square,$safeeval,'&math_random_chi_square');
794: $safehole->wrap(\&Math::Random::random_exponential,$safeeval,'&math_random_exponential');
795: $safehole->wrap(\&Math::Random::random_f,$safeeval,'&math_random_f');
796: $safehole->wrap(\&Math::Random::random_gamma,$safeeval,'&math_random_gamma');
797: $safehole->wrap(\&Math::Random::random_multivariate_normal,$safeeval,'&math_random_multivariate_normal');
798: $safehole->wrap(\&Math::Random::random_multinomial,$safeeval,'&math_random_multinomial');
799: $safehole->wrap(\&Math::Random::random_noncentral_chi_square,$safeeval,'&math_random_noncentral_chi_square');
800: $safehole->wrap(\&Math::Random::random_noncentral_f,$safeeval,'&math_random_noncentral_f');
801: $safehole->wrap(\&Math::Random::random_normal,$safeeval,'&math_random_normal');
802: $safehole->wrap(\&Math::Random::random_permutation,$safeeval,'&math_random_permutation');
803: $safehole->wrap(\&Math::Random::random_permuted_index,$safeeval,'&math_random_permuted_index');
804: $safehole->wrap(\&Math::Random::random_uniform,$safeeval,'&math_random_uniform');
805: $safehole->wrap(\&Math::Random::random_poisson,$safeeval,'&math_random_poisson');
806: $safehole->wrap(\&Math::Random::random_uniform_integer,$safeeval,'&math_random_uniform_integer');
807: $safehole->wrap(\&Math::Random::random_negative_binomial,$safeeval,'&math_random_negative_binomial');
808: $safehole->wrap(\&Math::Random::random_binomial,$safeeval,'&math_random_binomial');
809: $safehole->wrap(\&Math::Random::random_seed_from_phrase,$safeeval,'&random_seed_from_phrase');
810: $safehole->wrap(\&Math::Random::random_set_seed_from_phrase,$safeeval,'&random_set_seed_from_phrase');
811: $safehole->wrap(\&Math::Random::random_get_seed,$safeeval,'&random_get_seed');
812: $safehole->wrap(\&Math::Random::random_set_seed,$safeeval,'&random_set_seed');
813:
814: #need to inspect this class of ops
815: # $safeeval->deny(":base_orig");
816: $safeinit .= ';$external::target="'.$target.'";';
817: my $rndseed;
818: my ($symb,$courseid,$domain,$name) = &Apache::lonxml::whichuser();
819: $rndseed=&Apache::lonnet::rndseed($symb,$courseid,$domain,$name);
820: $safeinit .= ';$external::randomseed='.$rndseed.';';
821: &Apache::lonxml::debug("Setting rndseed to $rndseed");
822: &Apache::run::run($safeinit,$safeeval);
823: }
824:
825: sub default_homework_load {
826: my ($safeeval)=@_;
827: &Apache::lonxml::debug('Loading default_homework');
828: my $default=&Apache::lonnet::getfile('/home/httpd/html/res/adm/includes/default_homework.lcpm');
829: if ($default eq -1) {
830: &Apache::lonxml::error("<b>Unable to find <i>default_homework.lcpm</i></b>");
831: } else {
832: &Apache::run::run($default,$safeeval);
833: $Apache::lonxml::default_homework_loaded=1;
834: }
835: }
836:
837: sub startredirection {
838: $Apache::lonxml::redirection++;
839: push (@Apache::lonxml::outputstack, '');
840: }
841:
842: sub endredirection {
843: if (!$Apache::lonxml::redirection) {
844: &Apache::lonxml::error("Endredirection was called, before a startredirection, perhaps you have unbalanced tags. Some debuging information:".join ":",caller);
845: return '';
846: }
847: $Apache::lonxml::redirection--;
848: pop @Apache::lonxml::outputstack;
849: }
850:
851: sub end_tag {
852: my ($tagstack,$parstack,$token)=@_;
853: pop(@$tagstack);
854: pop(@$parstack);
855: &decreasedepth($token);
856: }
857:
858: sub initdepth {
859: @Apache::lonxml::depthcounter=();
860: $Apache::lonxml::depth=-1;
861: $Apache::lonxml::olddepth=-1;
862: }
863:
864: sub increasedepth {
865: my ($token) = @_;
866: $Apache::lonxml::depth++;
867: $Apache::lonxml::depthcounter[$Apache::lonxml::depth]++;
868: if ($Apache::lonxml::depthcounter[$Apache::lonxml::depth]==1) {
869: $Apache::lonxml::olddepth=$Apache::lonxml::depth;
870: }
871: my $curdepth=join('_',@Apache::lonxml::depthcounter);
872: &Apache::lonxml::debug("s $Apache::lonxml::depth : $Apache::lonxml::olddepth : $curdepth : $token->[1]\n");
873: #print "<br />s $Apache::lonxml::depth : $Apache::lonxml::olddepth : $curdepth : $token->[1]\n";
874: }
875:
876: sub decreasedepth {
877: my ($token) = @_;
878: $Apache::lonxml::depth--;
879: if ($Apache::lonxml::depth<$Apache::lonxml::olddepth-1) {
880: $#Apache::lonxml::depthcounter--;
881: $Apache::lonxml::olddepth=$Apache::lonxml::depth+1;
882: }
883: if ( $Apache::lonxml::depth < -1) {
884: &Apache::lonxml::warning("Missing tags, unable to properly run file.");
885: $Apache::lonxml::depth='-1';
886: }
887: my $curdepth=join('_',@Apache::lonxml::depthcounter);
888: &Apache::lonxml::debug("e $Apache::lonxml::depth : $Apache::lonxml::olddepth : $token->[1] : $curdepth\n");
889: #print "<br />e $Apache::lonxml::depth : $Apache::lonxml::olddepth : $token->[1] : $curdepth\n";
890: }
891:
892: sub get_all_text_unbalanced {
893: #there is a copy of this in lonpublisher.pm
894: my($tag,$pars)= @_;
895: my $token;
896: my $result='';
897: $tag='<'.$tag.'>';
898: while ($token = $$pars[-1]->get_token) {
899: if (($token->[0] eq 'T')||($token->[0] eq 'C')||($token->[0] eq 'D')) {
900: $result.=$token->[1];
901: } elsif ($token->[0] eq 'PI') {
902: $result.=$token->[2];
903: } elsif ($token->[0] eq 'S') {
904: $result.=$token->[4];
905: } elsif ($token->[0] eq 'E') {
906: $result.=$token->[2];
907: }
908: if ($result =~ /(.*)\Q$tag\E(.*)/s) {
909: &Apache::lonxml::debug('Got a winner with leftovers ::'.$2);
910: &Apache::lonxml::debug('Result is :'.$1);
911: $result=$1;
912: my $redo=$tag.$2;
913: &Apache::lonxml::newparser($pars,\$redo);
914: last;
915: }
916: }
917: return $result
918: }
919:
920: sub increment_counter {
921: my ($increment) = @_;
922: if (defined($increment) && $increment gt 0) {
923: $Apache::lonxml::counter+=$increment;
924: } else {
925: $Apache::lonxml::counter++;
926: }
927: $Apache::lonxml::counter_changed=1;
928: }
929:
930: sub init_counter {
931: if (defined($ENV{'form.counter'})) {
932: $Apache::lonxml::counter=$ENV{'form.counter'};
933: $Apache::lonxml::counter_changed=0;
934: } else {
935: $Apache::lonxml::counter=1;
936: $Apache::lonxml::counter_changed=1;
937: }
938: }
939:
940: sub store_counter {
941: &Apache::lonnet::appenv(('form.counter' => $Apache::lonxml::counter));
942: return '';
943: }
944:
945: sub get_all_text {
946: my($tag,$pars)= @_;
947: &Apache::lonxml::debug("Got a ".ref($pars));
948: my $gotfullstack=1;
949: if (ref($pars) ne 'ARRAY') {
950: $gotfullstack=0;
951: $pars=[$pars];
952: }
953: my $depth=0;
954: my $token;
955: my $result='';
956: if ( $tag =~ m:^/: ) {
957: my $tag=substr($tag,1);
958: #&Apache::lonxml::debug("have:$tag:");
959: my $top_empty=0;
960: while (($depth >=0) && ($#$pars > -1) && (!$top_empty)) {
961: while (($depth >=0) && ($token = $$pars[-1]->get_token)) {
962: #&Apache::lonxml::debug("e token:$token->[0]:$depth:$token->[1]:".$#$pars.":".$#Apache::lonxml::pwd);
963: if (($token->[0] eq 'T')||($token->[0] eq 'C')||($token->[0] eq 'D')) {
964: $result.=$token->[1];
965: } elsif ($token->[0] eq 'PI') {
966: $result.=$token->[2];
967: } elsif ($token->[0] eq 'S') {
968: if ($token->[1] =~ /^$tag$/i) { $depth++; }
969: $result.=$token->[4];
970: } elsif ($token->[0] eq 'E') {
971: if ( $token->[1] =~ /^$tag$/i) { $depth--; }
972: #skip sending back the last end tag
973: if ($depth > -1) { $result.=$token->[2]; } else {
974: $$pars[-1]->unget_token($token);
975: }
976: }
977: }
978: if (($depth >=0) && ($#$pars == 0) ) { $top_empty=1; }
979: if (($depth >=0) && ($#$pars > 0) ) {
980: pop(@$pars);
981: pop(@Apache::lonxml::pwd);
982: }
983: }
984: if ($top_empty && $depth >= 0) {
985: #never found the end tag ran out of text, throw error send back blank
986: &error('Never found end tag for <'.$tag.'>');
987: if ($gotfullstack) {
988: my $newstring='</'.$tag.'>'.$result;
989: &Apache::lonxml::newparser($pars,\$newstring);
990: }
991: $result='';
992: }
993: } else {
994: while ($#$pars > -1) {
995: while ($token = $$pars[-1]->get_token) {
996: #&Apache::lonxml::debug("s token:$token->[0]:$depth:$token->[1]");
997: if (($token->[0] eq 'T')||($token->[0] eq 'C')||
998: ($token->[0] eq 'D')) {
999: $result.=$token->[1];
1000: } elsif ($token->[0] eq 'PI') {
1001: $result.=$token->[2];
1002: } elsif ($token->[0] eq 'S') {
1003: if ( $token->[1] =~ /^$tag$/i) {
1004: $$pars[-1]->unget_token($token); last;
1005: } else {
1006: $result.=$token->[4];
1007: }
1008: } elsif ($token->[0] eq 'E') {
1009: $result.=$token->[2];
1010: }
1011: }
1012: if (($#$pars > 0) ) {
1013: pop(@$pars);
1014: pop(@Apache::lonxml::pwd);
1015: } else { last; }
1016: }
1017: }
1018: if ($result =~ m|<LONCAPA_INTERNAL_TURN_STYLE_ON />|) {
1019: $Apache::lonxml::usestyle=1;
1020: }
1021: #&Apache::lonxml::debug("Exit:$result:");
1022: return $result
1023: }
1024:
1025: sub newparser {
1026: my ($parser,$contentref,$dir) = @_;
1027: push (@$parser,HTML::LCParser->new($contentref));
1028: $$parser['-1']->xml_mode('1');
1029: if ( $dir eq '' ) {
1030: push (@Apache::lonxml::pwd, $Apache::lonxml::pwd[$#Apache::lonxml::pwd]);
1031: } else {
1032: push (@Apache::lonxml::pwd, $dir);
1033: }
1034: }
1035:
1036: sub parstring {
1037: my ($token) = @_;
1038: my $temp='';
1039: foreach (@{$token->[3]}) {
1040: unless ($_=~/\W/) {
1041: my $val=$token->[2]->{$_};
1042: $val =~ s/([\%\@\\\"\'])/\\$1/g;
1043: #if ($val =~ m/^[\%\@]/) { $val="\\".$val; }
1044: $temp .= "my \$$_=\"$val\";"
1045: }
1046: }
1047: return $temp;
1048: }
1049:
1050: sub writeallows {
1051: unless ($#extlinks>=0) { return; }
1052: my $thisurl='/res/'.&Apache::lonnet::declutter(shift);
1053: if ($ENV{'httpref.'.$thisurl}) {
1054: $thisurl=$ENV{'httpref.'.$thisurl};
1055: }
1056: my $thisdir=$thisurl;
1057: $thisdir=~s/\/[^\/]+$//;
1058: my %httpref=();
1059: foreach (@extlinks) {
1060: $httpref{'httpref.'.
1061: &Apache::lonnet::hreflocation($thisdir,$_)}=$thisurl;
1062: }
1063: @extlinks=();
1064: &Apache::lonnet::appenv(%httpref);
1065: }
1066:
1067: #
1068: # Afterburner handles anchors, highlights and links
1069: #
1070: sub afterburn {
1071: my $result=shift;
1072: &Apache::loncommon::get_unprocessed_cgi($ENV{'QUERY_STRING'},
1073: ['highlight','anchor','link']);
1074: if ($ENV{'form.highlight'}) {
1075: foreach (split(/\,/,$ENV{'form.highlight'})) {
1076: my $anchorname=$_;
1077: my $matchthis=$anchorname;
1078: $matchthis=~s/\_+/\\s\+/g;
1079: $result=~s/($matchthis)/\<font color=\"red\"\>$1\<\/font\>/gs;
1080: }
1081: }
1082: if ($ENV{'form.link'}) {
1083: foreach (split(/\,/,$ENV{'form.link'})) {
1084: my ($anchorname,$linkurl)=split(/\>/,$_);
1085: my $matchthis=$anchorname;
1086: $matchthis=~s/\_+/\\s\+/g;
1087: $result=~s/($matchthis)/\<a href=\"$linkurl\"\>$1\<\/a\>/gs;
1088: }
1089: }
1090: if ($ENV{'form.anchor'}) {
1091: my $anchorname=$ENV{'form.anchor'};
1092: my $matchthis=$anchorname;
1093: $matchthis=~s/\_+/\\s\+/g;
1094: $result=~s/($matchthis)/\<a name=\"$anchorname\"\>$1\<\/a\>/s;
1095: $result.=(<<"ENDSCRIPT");
1096: <script type="text/javascript">
1097: document.location.hash='$anchorname';
1098: </script>
1099: ENDSCRIPT
1100: }
1101: return $result;
1102: }
1103:
1104: sub storefile {
1105: my ($file,$contents)=@_;
1106: if (my $fh=Apache::File->new('>'.$file)) {
1107: print $fh $contents;
1108: $fh->close();
1109: } else {
1110: &warning("Unable to save file $file");
1111: }
1112: }
1113:
1114: sub createnewhtml {
1115: my $filecontents=(<<SIMPLECONTENT);
1116: <html>
1117: <head>
1118: <title>
1119: Title of Document Goes Here
1120: </title>
1121: </head>
1122: <body bgcolor="#FFFFFF">
1123:
1124: Body of Document Goes Here
1125:
1126: </body>
1127: </html>
1128: SIMPLECONTENT
1129: return $filecontents;
1130: }
1131:
1132:
1133: sub inserteditinfo {
1134: my ($result,$filecontents)=@_;
1135: $filecontents = &HTML::Entities::encode($filecontents);
1136: # my $editheader='<a href="#editsection">Edit below</a><hr />';
1137: my $xml_help = '<table><tr><td>'.
1138: &Apache::loncommon::help_open_topic("Greek_Symbols",'Greek Symbols',
1139: undef,undef,600)
1140: .'</td><td>'.
1141: &Apache::loncommon::help_open_topic("Other_Symbols",'Other Symbols',
1142: undef,undef,600)
1143: .'</td></tr></table>';
1144: my $titledisplay=&display_title();
1145: my $buttons=(<<BUTTONS);
1146: <input type="submit" name="attemptclean"
1147: value="Save and then attempt to clean HTML" />
1148: <input type="submit" name="savethisfile" value="Save this" />
1149: <input type="submit" name="viewmode" value="View" />
1150: BUTTONS
1151: my $editfooter=(<<ENDFOOTER);
1152: <hr />
1153: <a name="editsection" />
1154: <form method="post">
1155: $xml_help
1156: <input type="hidden" name="editmode" value="Edit" />
1157: $buttons<br />
1158: <textarea cols="80" rows="40" name="filecont">$filecontents</textarea>
1159: <br />$buttons
1160: <br />
1161: </form>
1162: $titledisplay
1163: ENDFOOTER
1164: # $result=~s/(\<body[^\>]*\>)/$1$editheader/is;
1165: $result=~s/(\<\/body\>)/$editfooter/is;
1166: return $result;
1167: }
1168:
1169: sub get_target {
1170: my $viewgrades=&Apache::lonnet::allowed('vgr',$ENV{'request.course.id'});
1171: if ( $ENV{'request.state'} eq 'published') {
1172: if ( defined($ENV{'form.grade_target'})
1173: && ($viewgrades == 'F' )) {
1174: return ($ENV{'form.grade_target'});
1175: } elsif (defined($ENV{'form.grade_target'})) {
1176: if (($ENV{'form.grade_target'} eq 'web') ||
1177: ($ENV{'form.grade_target'} eq 'tex') ) {
1178: return $ENV{'form.grade_target'}
1179: } else {
1180: return 'web';
1181: }
1182: } else {
1183: return 'web';
1184: }
1185: } elsif ($ENV{'request.state'} eq 'construct') {
1186: if ( defined($ENV{'form.grade_target'})) {
1187: return ($ENV{'form.grade_target'});
1188: } else {
1189: return 'web';
1190: }
1191: } else {
1192: return 'web';
1193: }
1194: }
1195:
1196: sub handler {
1197: my $request=shift;
1198:
1199: my $target=&get_target();
1200:
1201: $Apache::lonxml::debug=$ENV{'user.debug'};
1202:
1203: if ($ENV{'browser.mathml'}) {
1204: $request->content_type('text/xml');
1205: } else {
1206: $request->content_type('text/html');
1207: }
1208: &Apache::loncommon::no_cache($request);
1209: $request->send_http_header;
1210:
1211: return OK if $request->header_only;
1212:
1213:
1214: my $file=&Apache::lonnet::filelocation("",$request->uri);
1215: #
1216: # Edit action? Save file.
1217: #
1218: unless ($ENV{'request.state'} eq 'published') {
1219: if (($ENV{'form.savethisfile'}) || ($ENV{'form.attemptclean'})) {
1220: &storefile($file,$ENV{'form.filecont'});
1221: }
1222: }
1223: my %mystyle;
1224: my $result = '';
1225: my $filecontents=&Apache::lonnet::getfile($file);
1226: if ($filecontents eq -1) {
1227: $result=(<<ENDNOTFOUND);
1228: <html>
1229: <head>
1230: <title>File not found</title>
1231: </head>
1232: <body bgcolor="#FFFFFF">
1233: <b>File not found: $file</b>
1234: </body>
1235: </html>
1236: ENDNOTFOUND
1237: $filecontents='';
1238: if ($ENV{'request.state'} ne 'published') {
1239: $filecontents=&createnewhtml();
1240: $ENV{'form.editmode'}='Edit'; #force edit mode
1241: }
1242: } else {
1243: unless ($ENV{'request.state'} eq 'published') {
1244: if ($ENV{'form.attemptclean'}) {
1245: $filecontents=&htmlclean($filecontents,1);
1246: }
1247: }
1248: if (!$ENV{'form.editmode'} || $ENV{'form.viewmode'}) {
1249: $result = &Apache::lonxml::xmlparse($request,$target,$filecontents,
1250: '',%mystyle);
1251: }
1252: }
1253:
1254: #
1255: # Edit action? Insert editing commands
1256: #
1257: unless ($ENV{'request.state'} eq 'published') {
1258: if ($ENV{'form.editmode'} && (!($ENV{'form.viewmode'}))) {
1259: my $displayfile=$request->uri;
1260: $displayfile=~s/^\/[^\/]*//;
1261: $result='<html><body bgcolor="#FFFFFF"><h3>'.$displayfile.
1262: '</h3></body></html>';
1263: $result=&inserteditinfo($result,$filecontents);
1264: }
1265: }
1266:
1267: writeallows($request->uri);
1268:
1269:
1270: $request->print($result);
1271:
1272: return OK;
1273: }
1274:
1275: sub display_title {
1276: my $result;
1277: if ($ENV{'request.state'} eq 'construct') {
1278: my $title=&Apache::lonnet::gettitle();
1279: if (!defined($title) || $title eq '') {
1280: $title = $ENV{'request.filename'};
1281: $title = substr($title, rindex($title, '/') + 1);
1282: }
1283: $result = "<script type='text/javascript'>top.document.title = '$title - LON-CAPA Construction Space';</script>";
1284: }
1285: return $result;
1286: }
1287:
1288: sub debug {
1289: if ($Apache::lonxml::debug eq 1) {
1290: $|=1;
1291: print('<font size="-2"<pre>DEBUG:'.&HTML::Entities::encode($_[0])."</pre></font>\n");
1292: }
1293: }
1294:
1295: sub error {
1296: $errorcount++;
1297: if (($Apache::lonxml::debug eq 1) || ($ENV{'request.state'} eq 'construct') ) {
1298: # If printing in construction space, put the error inside <pre></pre>
1299: print "<b>ERROR:</b>".join("\n",@_)."\n";
1300: } else {
1301: print "<b>An Error occured while processing this resource. The instructor has been notified.</b> <br />";
1302: #notify author
1303: &Apache::lonmsg::author_res_msg($ENV{'request.filename'},join('<br />',@_));
1304: #notify course
1305: if ( $ENV{'request.course.id'} ) {
1306: my (undef,%users)=&Apache::lonfeedback::decide_receiver(undef,0,1,1,1);
1307: my $declutter=&Apache::lonnet::declutter($ENV{'request.filename'});
1308: foreach (keys %users) {
1309: my ($user,$domain) = split(/:/, $_);
1310: &Apache::lonmsg::user_normal_msg($user,$domain,
1311: "Error [$declutter]",join('<br />',@_));
1312: }
1313: }
1314:
1315: #FIXME probably shouldn't have me get everything forever.
1316: &Apache::lonmsg::user_normal_msg('albertel','msu',"Error in $ENV{'request.filename'}",join('<br />',@_));
1317: #&Apache::lonmsg::user_normal_msg('albertel','103',"Error in $ENV{'request.filename'}",$_[0]);
1318: }
1319: }
1320:
1321: sub warning {
1322: $warningcount++;
1323: if ($ENV{'request.state'} eq 'construct' || $Apache::lonxml::debug) {
1324: print "<b>W</b>ARNING<b>:</b>".join('<br />',@_)."<br />\n";
1325: }
1326: }
1327:
1328: sub get_param {
1329: my ($param,$parstack,$safeeval,$context,$case_insensitive) = @_;
1330: if ( ! $context ) { $context = -1; }
1331: my $args ='';
1332: if ( $#$parstack > (-2-$context) ) { $args=$$parstack[$context]; }
1333: if ( ! $args ) { return undef; }
1334: if ( $case_insensitive ) {
1335: if ($args =~ s/(my \$)(\Q$param\E)(=\")/$1.lc($2).$3/ei) {
1336: return &Apache::run::run("{$args;".'return $'.$param.'}',
1337: $safeeval); #'
1338: } else {
1339: return undef;
1340: }
1341: } else {
1342: if ( $args =~ /my \$\Q$param\E=\"/ ) {
1343: return &Apache::run::run("{$args;".'return $'.$param.'}',
1344: $safeeval); #'
1345: } else {
1346: return undef;
1347: }
1348: }
1349: }
1350:
1351: sub get_param_var {
1352: my ($param,$parstack,$safeeval,$context,$case_insensitive) = @_;
1353: if ( ! $context ) { $context = -1; }
1354: my $args ='';
1355: if ( $#$parstack > (-2-$context) ) { $args=$$parstack[$context]; }
1356: &Apache::lonxml::debug("Args are $args param is $param");
1357: if ($case_insensitive) {
1358: if (! ($args=~s/(my \$)(\Q$param\E)(=\")/$1.lc($2).$3/ei)) {
1359: return undef;
1360: }
1361: } elsif ( $args !~ /my \$\Q$param\E=\"/ ) { return undef; }
1362: my $value=&Apache::run::run("{$args;".'return $'.$param.'}',$safeeval); #'
1363: &Apache::lonxml::debug("first run is $value");
1364: if ($value =~ /^[\$\@\%]\w+$/) {
1365: &Apache::lonxml::debug("doing second");
1366: my @result=&Apache::run::run("return $value",$safeeval,1);
1367: if (!defined($result[0])) {
1368: return $value
1369: } else {
1370: if (wantarray) { return @result; } else { return $result[0]; }
1371: }
1372: } else {
1373: return $value;
1374: }
1375: }
1376:
1377: sub register_insert {
1378: my @data = split /\n/, &Apache::lonnet::getfile('/home/httpd/lonTabs/insertlist.tab');
1379: my $i;
1380: my $tagnum=0;
1381: my @order;
1382: for ($i=0;$i < $#data; $i++) {
1383: my $line = $data[$i];
1384: if ( $line =~ /^\#/ || $line =~ /^\s*\n/) { next; }
1385: if ( $line =~ /TABLE/ ) { last; }
1386: my ($tag,$descrip,$color,$function,$show) = split(/,/, $line);
1387: if ($tag) {
1388: $insertlist{"$tagnum.tag"} = $tag;
1389: $insertlist{"$tagnum.description"} = $descrip;
1390: $insertlist{"$tagnum.color"} = $color;
1391: $insertlist{"$tagnum.function"} = $function;
1392: if (!defined($show)) { $show='yes'; }
1393: $insertlist{"$tagnum.show"}= $show;
1394: $insertlist{"$tag.num"}=$tagnum;
1395: $tagnum++;
1396: }
1397: }
1398: $i++; #skipping TABLE line
1399: $tagnum = 0;
1400: for (;$i < $#data;$i++) {
1401: my $line = $data[$i];
1402: my ($mnemonic,@which) = split(/ +/,$line);
1403: my $tag = $insertlist{"$tagnum.tag"};
1404: for (my $j=0;$j <=$#which;$j++) {
1405: if ( $which[$j] eq 'Y' ) {
1406: if ($insertlist{"$j.show"} ne 'no') {
1407: push(@{ $insertlist{"$tag.which"} },$j);
1408: }
1409: }
1410: }
1411: $tagnum++;
1412: }
1413: }
1414:
1415: sub description {
1416: my ($token)=@_;
1417: my $tagnum;
1418: my $tag=$token->[1];
1419: foreach my $namespace (reverse @Apache::lonxml::namespace) {
1420: my $testtag=$namespace.'::'.$tag;
1421: $tagnum=$insertlist{"$testtag.num"};
1422: if (defined($tagnum)) { last; }
1423: }
1424: if (!defined ($tagnum)) { $tagnum=$Apache::lonxml::insertlist{"$tag.num"}; }
1425: return $insertlist{$tagnum.'.description'};
1426: }
1427:
1428: # ----------------------------------------------------------------- whichuser
1429: # returns a list of $symb, $courseid, $domain, $name that is correct for
1430: # calls to lonnet functions for this setup.
1431: # - looks for form.grade_ parameters
1432: sub whichuser {
1433: my ($symb,$courseid,$domain,$name,$publicuser);
1434: if (defined($ENV{'form.grade_symb'})) {
1435: my $tmp_courseid=$ENV{'form.grade_courseid'};
1436: my $allowed=&Apache::lonnet::allowed('mgr',$tmp_courseid);
1437: if ($allowed) {
1438: $symb=$ENV{'form.grade_symb'};
1439: $courseid=$ENV{'form.grade_courseid'};
1440: $domain=$ENV{'form.grade_domain'};
1441: $name=$ENV{'form.grade_username'};
1442: }
1443: } else {
1444: $symb=&Apache::lonnet::symbread();
1445: $courseid=$ENV{'request.course.id'};
1446: $domain=$ENV{'user.domain'};
1447: $name=$ENV{'user.name'};
1448: if ($name eq 'public' && $domain eq 'public') {
1449: if (!defined($ENV{'form.username'})) {
1450: $ENV{'form.username'}.=time.rand(10000000);
1451: }
1452: $name.=$ENV{'form.username'};
1453: }
1454: }
1455: return ($symb,$courseid,$domain,$name,$publicuser);
1456: }
1457:
1458: 1;
1459: __END__
1460:
1461:
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