1: # The LearningOnline Network with CAPA
2: # XML Parser Module
3: #
4: # $Id: lonxml.pm,v 1.266.2.1 2003/08/07 19:31:16 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 $warningcount);
63: use strict;
64: use HTML::LCParser();
65: use HTML::TreeBuilder();
66: use HTML::Entities();
67: use Safe();
68: use Safe::Hole();
69: use Math::Cephes();
70: use Math::Random();
71: use Opcode();
72:
73:
74: sub register {
75: my ($space,@taglist) = @_;
76: foreach my $temptag (@taglist) {
77: push(@{ $Apache::lonxml::alltags{$temptag} },$space);
78: }
79: }
80:
81: sub deregister {
82: my ($space,@taglist) = @_;
83: foreach my $temptag (@taglist) {
84: my $tempspace = $Apache::lonxml::alltags{$temptag}[-1];
85: if ($tempspace eq $space) {
86: pop(@{ $Apache::lonxml::alltags{$temptag} });
87: }
88: }
89: #&printalltags();
90: }
91:
92: use Apache::Constants qw(:common);
93: use Apache::lontexconvert();
94: use Apache::style();
95: use Apache::run();
96: use Apache::londefdef();
97: use Apache::scripttag();
98: use Apache::edit();
99: use Apache::inputtags();
100: use Apache::outputtags();
101: use Apache::lonnet();
102: use Apache::File();
103: use Apache::loncommon();
104: use Apache::lonfeedback();
105: use Apache::lonmsg();
106: use Apache::loncacc();
107:
108: #================================================== Main subroutine: xmlparse
109: #debugging control, to turn on debugging modify the correct handler
110: $Apache::lonxml::debug=0;
111:
112: # keeps count of the number of warnings and errors generated in a parse
113: $warningcount=0;
114: $errorcount=0;
115:
116: #path to the directory containing the file currently being processed
117: @pwd=();
118:
119: #these two are used for capturing a subset of the output for later processing,
120: #don't touch them directly use &startredirection and &endredirection
121: @outputstack = ();
122: $redirection = 0;
123:
124: #controls wheter the <import> tag actually does
125: $import = 1;
126: @extlinks=();
127:
128: # meta mode is a bit weird only some output is to be turned off
129: #<output> tag turns metamode off (defined in londefdef.pm)
130: $metamode = 0;
131:
132: # turns on and of run::evaluate actually derefencing var refs
133: $evaluate = 1;
134:
135: # data structure for eidt mode, determines what tags can go into what other tags
136: %insertlist=();
137:
138: # stores the list of active tag namespaces
139: @namespace=();
140:
141: # if 0 all high ASCII characters will be encoded into HTML Entities
142: $prevent_entity_encode=0;
143:
144: # has the dynamic menu been updated to know about this resource
145: $Apache::lonxml::registered=0;
146:
147: # a pointer the the Apache request object
148: $Apache::lonxml::request='';
149:
150: # a problem number counter, and check on ether it is used
151: $Apache::lonxml::counter=1;
152: $Apache::lonxml::counter_changed=0;
153:
154: #internal check on whether to look at style defs
155: $Apache::lonxml::usestyle=1;
156:
157: #locations used to store the parameter string for style substitutions
158: $Apache::lonxml::style_values='';
159: $Apache::lonxml::style_end_values='';
160:
161: sub xmlbegin {
162: my $output='';
163: if ($ENV{'browser.mathml'}) {
164: $output='<?xml version="1.0"?>'
165: .'<?xml-stylesheet type="text/css" href="/adm/MathML/mathml.css"?>'
166: .'<!DOCTYPE html SYSTEM "/adm/MathML/mathml.dtd" '
167: .'[<!ENTITY mathns "http://www.w3.org/1998/Math/MathML">]>'
168: .'<html xmlns:math="http://www.w3.org/1998/Math/MathML" '
169: .'xmlns="http://www.w3.org/TR/REC-html40">';
170: } else {
171: $output='<html>';
172: }
173: return $output;
174: }
175:
176: sub xmlend {
177: my ($discussiononly,$symb)=@_;
178: my $discussion='';
179: if ($ENV{'request.course.id'}) {
180: my $crs='/'.$ENV{'request.course.id'};
181: if ($ENV{'request.course.sec'}) {
182: $crs.='_'.$ENV{'request.course.sec'};
183: }
184: $crs=~s/\_/\//g;
185: my $seeid=&Apache::lonnet::allowed('rin',$crs);
186: unless ($symb) {
187: $symb=&Apache::lonnet::symbread();
188: }
189: if ($symb) {
190: my %contrib=&Apache::lonnet::restore($symb,$ENV{'request.course.id'},
191: $ENV{'course.'.$ENV{'request.course.id'}.'.domain'},
192: $ENV{'course.'.$ENV{'request.course.id'}.'.num'});
193: if ($contrib{'version'}) {
194: unless ($discussiononly) {
195: $discussion.=
196: '<address><hr />';
197: }
198: my $idx;
199: for ($idx=1;$idx<=$contrib{'version'};$idx++) {
200: my $hidden=($contrib{'hidden'}=~/\.$idx\./);
201: my $deleted=($contrib{'deleted'}=~/\.$idx\./);
202: unless ((($hidden) && (!$seeid)) || ($deleted)) {
203: my $message=$contrib{$idx.':message'};
204: $message=~s/\n/\<br \/\>/g;
205: $message=&Apache::lontexconvert::msgtexconverted($message);
206: if ($contrib{$idx.':attachmenturl'}) {
207: my ($fname,$ft)
208: =($contrib{$idx.':attachmenturl'}=~/\/(\w+)\.(\w+)$/);
209: $message.='<p>Attachment: <a href="'.
210: &Apache::lonnet::tokenwrapper($contrib{$idx.':attachmenturl'}).
211: '"><tt>'.$fname.'.'.$ft.'</tt></a>';
212: }
213: if ($message) {
214: if ($hidden) {
215: $message='<font color="#888888">'.$message.'</font>';
216: }
217: my $screenname=&Apache::loncommon::screenname(
218: $contrib{$idx.':sendername'},
219: $contrib{$idx.':senderdomain'});
220: my $plainname=&Apache::loncommon::nickname(
221: $contrib{$idx.':sendername'},
222: $contrib{$idx.':senderdomain'});
223:
224: my $sender='Anonymous';
225: if ((!$contrib{$idx.':anonymous'}) || ($seeid)) {
226: $sender=&Apache::loncommon::aboutmewrapper(
227: $plainname,
228: $contrib{$idx.':sendername'},
229: $contrib{$idx.':senderdomain'}).' ('.
230: $contrib{$idx.':sendername'}.' at '.
231: $contrib{$idx.':senderdomain'}.')';
232: if ($contrib{$idx.':anonymous'}) {
233: $sender.=' [anonymous] '.
234: $screenname;
235: }
236: if ($seeid) {
237: if ($hidden) {
238: $sender.=' <a href="/adm/feedback?unhide='.
239: $symb.':::'.$idx.'">Make Visible</a>';
240: } else {
241: $sender.=' <a href="/adm/feedback?hide='.
242: $symb.':::'.$idx.'">Hide</a>';
243: }
244: $sender.=' <a href="/adm/feedback?deldisc='.
245: $symb.':::'.$idx.'">Delete</a>';
246: }
247: } else {
248: if ($screenname) {
249: $sender='<i>'.$screenname.'</i>';
250: }
251: }
252: $discussion.='<p><b>'.$sender.'</b> ('.
253: localtime($contrib{$idx.':timestamp'}).
254: '):<blockquote>'.$message.
255: '</blockquote></p>';
256: }
257: }
258: }
259: unless ($discussiononly) {
260: $discussion.='</address>';
261: }
262: }
263: if ($discussiononly) {
264: $discussion.=(<<ENDDISCUSS);
265: <form action="/adm/feedback" method="post" name="mailform" enctype="multipart/form-data">
266: <input type="submit" name="discuss" value="Post Discussion" />
267: <input type="submit" name="anondiscuss" value="Post Anonymous Discussion" />
268: <input type="hidden" name="symb" value="$symb" />
269: <input type="hidden" name="sendit" value="true" />
270: <br />
271: <font size="1">Note: in anonymous discussion, your name is visible only to
272: course faculty</font><br />
273: <textarea name=comment cols=60 rows=10 wrap=hard></textarea>
274: <p>
275: Attachment (128 KB max size): <input type="file" name="attachment" />
276: </p>
277: </form>
278: ENDDISCUSS
279: $discussion.=&Apache::lonfeedback::generate_preview_button();
280: }
281: }
282: }
283: return $discussion.($discussiononly?'':'</html>');
284: }
285:
286: sub tokeninputfield {
287: my $defhost=$Apache::lonnet::perlvar{'lonHostID'};
288: $defhost=~tr/a-z/A-Z/;
289: return (<<ENDINPUTFIELD)
290: <script type="text/javascript">
291: function updatetoken() {
292: var comp=new Array;
293: var barcode=unescape(document.tokeninput.barcode.value);
294: comp=barcode.split('*');
295: if (typeof(comp[0])!="undefined") {
296: document.tokeninput.codeone.value=comp[0];
297: }
298: if (typeof(comp[1])!="undefined") {
299: document.tokeninput.codetwo.value=comp[1];
300: }
301: if (typeof(comp[2])!="undefined") {
302: comp[2]=comp[2].toUpperCase();
303: document.tokeninput.codethree.value=comp[2];
304: }
305: document.tokeninput.barcode.value='';
306: }
307: </script>
308: <form method="post" name="tokeninput">
309: <table border="2" bgcolor="#FFFFBB">
310: <tr><th>DocID Checkin</th></tr>
311: <tr><td>
312: <table>
313: <tr>
314: <td>Scan in Barcode</td>
315: <td><input type="text" size="22" name="barcode"
316: onChange="updatetoken()"/></td>
317: </tr>
318: <tr><td><i>or</i> Type in DocID</td>
319: <td>
320: <input type="text" size="5" name="codeone" />
321: <b><font size="+2">*</font></b>
322: <input type="text" size="5" name="codetwo" />
323: <b><font size="+2">*</font></b>
324: <input type="text" size="10" name="codethree" value="$defhost"
325: onChange="this.value=this.value.toUpperCase()" />
326: </td></tr>
327: </table>
328: </td></tr>
329: <tr><td><input type="submit" value="Check in DocID" /></td></tr>
330: </table>
331: </form>
332: ENDINPUTFIELD
333: }
334:
335: sub maketoken {
336: my ($symb,$tuname,$tudom,$tcrsid)=@_;
337: unless ($symb) {
338: $symb=&Apache::lonnet::symbread();
339: }
340: unless ($tuname) {
341: $tuname=$ENV{'user.name'};
342: $tudom=$ENV{'user.domain'};
343: $tcrsid=$ENV{'request.course.id'};
344: }
345:
346: return &Apache::lonnet::checkout($symb,$tuname,$tudom,$tcrsid);
347: }
348:
349: sub printtokenheader {
350: my ($target,$token,$tsymb,$tcrsid,$tudom,$tuname)=@_;
351: unless ($token) { return ''; }
352:
353: my ($symb,$courseid,$domain,$name) = &Apache::lonxml::whichuser();
354: unless ($tsymb) {
355: $tsymb=$symb;
356: }
357: unless ($tuname) {
358: $tuname=$name;
359: $tudom=$domain;
360: $tcrsid=$courseid;
361: }
362:
363: my %reply=&Apache::lonnet::get('environment',
364: ['firstname','middlename','lastname','generation'],
365: $tudom,$tuname);
366: my $plainname=$reply{'firstname'}.' '.
367: $reply{'middlename'}.' '.
368: $reply{'lastname'}.' '.
369: $reply{'generation'};
370:
371: if ($target eq 'web') {
372: my %idhash=&Apache::lonnet::idrget($tudom,($tuname));
373: return
374: '<img align="right" src="/cgi-bin/barcode.png?encode='.$token.'" />'.
375: 'Checked out for '.$plainname.
376: '<br />User: '.$tuname.' at '.$tudom.
377: '<br />ID: '.$idhash{$tuname}.
378: '<br />CourseID: '.$tcrsid.
379: '<br />Course: '.$ENV{'course.'.$tcrsid.'.description'}.
380: '<br />DocID: '.$token.
381: '<br />Time: '.localtime().'<hr />';
382: } else {
383: return $token;
384: }
385: }
386:
387: sub fontsettings() {
388: my $headerstring='';
389: if (($ENV{'browser.os'} eq 'mac') && (!$ENV{'browser.mathml'})) {
390: $headerstring.=
391: '<meta Content-Type="text/html; charset=x-mac-roman">';
392: } elsif (!$ENV{'browser.mathml'} && $ENV{'browser.unicode'}) {
393: $headerstring.=
394: '<meta http-equiv="Content-Type" content="text/html; charset=utf-8" />';
395: }
396: return $headerstring;
397: }
398:
399: sub printalltags {
400: my $temp;
401: foreach $temp (sort keys %Apache::lonxml::alltags) {
402: &Apache::lonxml::debug("$temp -- ".
403: join(',',@{ $Apache::lonxml::alltags{$temp} }));
404: }
405: }
406:
407: sub xmlparse {
408: my ($request,$target,$content_file_string,$safeinit,%style_for_target) = @_;
409:
410: &setup_globals($request,$target);
411: &Apache::inputtags::initialize_inputtags();
412: &Apache::outputtags::initialize_outputtags();
413: &Apache::edit::initialize_edit();
414:
415: #
416: # do we have a course style file?
417: #
418:
419: if ($ENV{'request.course.id'} && $ENV{'request.state'} ne 'construct') {
420: my $bodytext=
421: $ENV{'course.'.$ENV{'request.course.id'}.'.default_xml_style'};
422: if ($bodytext) {
423: my $location=&Apache::lonnet::filelocation('',$bodytext);
424: my $styletext=&Apache::lonnet::getfile($location);
425: if ($styletext ne '-1') {
426: %style_for_target = (%style_for_target,
427: &Apache::style::styleparser($target,$styletext));
428: }
429: }
430: }
431: #&printalltags();
432: my @pars = ();
433: my $pwd=$ENV{'request.filename'};
434: $pwd =~ s:/[^/]*$::;
435: &newparser(\@pars,\$content_file_string,$pwd);
436:
437: my $safeeval = new Safe;
438: my $safehole = new Safe::Hole;
439: &init_safespace($target,$safeeval,$safehole,$safeinit);
440: #-------------------- Redefinition of the target in the case of compound target
441:
442: ($target, my @tenta) = split('&&',$target);
443:
444: my @stack = ();
445: my @parstack = ();
446: &initdepth;
447:
448: my $finaloutput = &inner_xmlparse($target,\@stack,\@parstack,\@pars,
449: $safeeval,\%style_for_target);
450:
451: if ($ENV{'request.uri'}) {
452: &writeallows($ENV{'request.uri'});
453: }
454: if ($Apache::lonxml::counter_changed) { &store_counter() }
455: return $finaloutput;
456: }
457:
458: sub htmlclean {
459: my ($raw,$full)=@_;
460:
461: my $tree = HTML::TreeBuilder->new;
462: $tree->ignore_unknown(0);
463:
464: $tree->parse($raw);
465:
466: my $output= $tree->as_HTML(undef,' ');
467:
468: $output=~s/\<(br|hr|img|meta|allow)(.*?)\>/\<$1$2 \/\>/gis;
469: $output=~s/\<\/(br|hr|img|meta|allow)\>//gis;
470: unless ($full) {
471: $output=~s/\<[\/]*(body|head|html)\>//gis;
472: }
473:
474: $tree = $tree->delete;
475:
476: return $output;
477: }
478:
479: sub latex_special_symbols {
480: my ($current_token,$stack,$parstack,$where)=@_;
481: if ($where eq 'header') {
482: $current_token =~ s/(\\|_|\^)/ /g;
483: $current_token =~ s/(\$|%|\#|&|\{|\})/\\$1/g;
484: } else {
485: $current_token=~s/\\ /\\char92 /g;
486: $current_token=~s/\^/\\char94 /g;
487: $current_token=~s/\~/\\char126 /g;
488: $current_token=~s/(&[^A-Za-z\#])/\\$1/g;
489: $current_token=~s/([^&])\#/$1\\#/g;
490: $current_token=~s/(\$|_|{|})/\\$1/g;
491: $current_token=~s/\\char92 /\\texttt{\\char92}/g;
492: $current_token=~s/(>|<)/\$$1\$/g; #more or less
493: if ($current_token=~m/\d%/) {$current_token =~ s/(\d)%/$1\\%/g;} #percent after digit
494: if ($current_token=~m/\s%/) {$current_token =~ s/(\s)%/$1\\%/g;} #persent after space
495: }
496: return $current_token;
497: }
498:
499: sub inner_xmlparse {
500: my ($target,$stack,$parstack,$pars,$safeeval,$style_for_target)=@_;
501: my $finaloutput = '';
502: my $result;
503: my $token;
504: my $dontpop=0;
505: while ( $#$pars > -1 ) {
506: while ($token = $$pars['-1']->get_token) {
507: if (($token->[0] eq 'T') || ($token->[0] eq 'C') ) {
508: if ($metamode<1) {
509: my $text=$token->[1];
510: if ($token->[0] eq 'C' && $target eq 'tex') {
511: $text = '';
512: # $text = '%'.$text."\n";
513: }
514: $result.=$text;
515: }
516: } elsif (($token->[0] eq 'D')) {
517: if ($metamode<1 && $target eq 'web') {
518: my $text=$token->[1];
519: $result.=$text;
520: }
521: } elsif ($token->[0] eq 'PI') {
522: if ($metamode<1 && $target eq 'web') {
523: $result=$token->[2];
524: }
525: } elsif ($token->[0] eq 'S') {
526: # add tag to stack
527: push (@$stack,$token->[1]);
528: # add parameters list to another stack
529: push (@$parstack,&parstring($token));
530: &increasedepth($token);
531: if ($Apache::lonxml::usestyle &&
532: exists($$style_for_target{$token->[1]})) {
533: $Apache::lonxml::usestyle=0;
534: my $string=$$style_for_target{$token->[1]}.
535: '<LONCAPA_INTERNAL_TURN_STYLE_ON />';
536: &Apache::lonxml::newparser($pars,\$string);
537: $Apache::lonxml::style_values=$$parstack[-1];
538: $Apache::lonxml::style_end_values=$$parstack[-1];
539: } else {
540: $result = &callsub("start_$token->[1]", $target, $token, $stack,
541: $parstack, $pars, $safeeval, $style_for_target);
542: }
543: } elsif ($token->[0] eq 'E') {
544: if ($Apache::lonxml::usestyle &&
545: exists($$style_for_target{'/'."$token->[1]"})) {
546: $Apache::lonxml::usestyle=0;
547: my $string=$$style_for_target{'/'.$token->[1]}.
548: '<LONCAPA_INTERNAL_TURN_STYLE_ON end="'.$token->[1].'" />';
549: &Apache::lonxml::newparser($pars,\$string);
550: $Apache::lonxml::style_values=$Apache::lonxml::style_end_values;
551: $Apache::lonxml::style_end_values='';
552: $dontpop=1;
553: } else {
554: #clear out any tags that didn't end
555: while ($token->[1] ne $$stack['-1'] && ($#$stack > -1)) {
556: my $lasttag=$$stack[-1];
557: if ($token->[1] =~ /^$lasttag$/i) {
558: &Apache::lonxml::warning('Using tag </'.$token->[1].'> on line '.$token->[3].' as end tag to <'.$$stack[-1].'>');
559: last;
560: } else {
561: &Apache::lonxml::warning('Found tag </'.$token->[1].'> on line '.$token->[3].' when looking for </'.$$stack[-1].'> in file');
562: &end_tag($stack,$parstack,$token);
563: }
564: }
565: $result = &callsub("end_$token->[1]", $target, $token, $stack,
566: $parstack, $pars,$safeeval, $style_for_target);
567: }
568: } else {
569: &Apache::lonxml::error("Unknown token event :$token->[0]:$token->[1]:");
570: }
571: #evaluate variable refs in result
572: if ($result ne "") {
573: my $extras;
574: if (!$Apache::lonxml::usestyle) {
575: $extras=$Apache::lonxml::style_values;
576: }
577: if ( $#$parstack > -1 ) {
578: $result=&Apache::run::evaluate($result,$safeeval,$extras.$$parstack[-1]);
579: } else {
580: $result= &Apache::run::evaluate($result,$safeeval,$extras);
581: }
582: }
583: if (($token->[0] eq 'T') || ($token->[0] eq 'C') || ($token->[0] eq 'D') ) {
584: #Style file definitions should be correct
585: if ($target eq 'tex' && ($Apache::lonxml::usestyle)) {
586: $result=&latex_special_symbols($result,$stack,$parstack);
587: }
588: }
589:
590: # Encode any high ASCII characters
591: if (!$Apache::lonxml::prevent_entity_encode) {
592: $result=&HTML::Entities::encode($result,"\200-\377");
593: }
594: if ($Apache::lonxml::redirection) {
595: $Apache::lonxml::outputstack['-1'] .= $result;
596: } else {
597: $finaloutput.=$result;
598: }
599: $result = '';
600:
601: if ($token->[0] eq 'E' && !$dontpop) {
602: &end_tag($stack,$parstack,$token);
603: }
604: $dontpop=0;
605: }
606: if ($#$pars > -1) {
607: pop @$pars;
608: pop @Apache::lonxml::pwd;
609: }
610: }
611:
612: # if ($target eq 'meta') {
613: # $finaloutput.=&endredirection;
614: # }
615:
616:
617: if (($ENV{'QUERY_STRING'}) && ($target eq 'web')) {
618: $finaloutput=&afterburn($finaloutput);
619: }
620: return $finaloutput;
621: }
622:
623: sub callsub {
624: my ($sub,$target,$token,$tagstack,$parstack,$parser,$safeeval,$style)=@_;
625: my $currentstring='';
626: my $nodefault;
627: {
628: my $sub1;
629: no strict 'refs';
630: my $tag=$token->[1];
631: # get utterly rid of extended html tags
632: if ($tag=~/^x\-/i) { return ''; }
633: my $space=$Apache::lonxml::alltags{$tag}[-1];
634: if (!$space) {
635: $tag=~tr/A-Z/a-z/;
636: $sub=~tr/A-Z/a-z/;
637: $space=$Apache::lonxml::alltags{$tag}[-1]
638: }
639:
640: my $deleted=0;
641: $Apache::lonxml::curdepth=join('_',@Apache::lonxml::depthcounter);
642: if (($token->[0] eq 'S') && ($target eq 'modified')) {
643: $deleted=&Apache::edit::handle_delete($space,$target,$token,$tagstack,
644: $parstack,$parser,$safeeval,
645: $style);
646: }
647: if (!$deleted) {
648: if ($space) {
649: #&Apache::lonxml::debug("Calling sub $sub in $space $metamode");
650: $sub1="$space\:\:$sub";
651: ($currentstring,$nodefault) = &$sub1($target,$token,$tagstack,
652: $parstack,$parser,$safeeval,
653: $style);
654: } else {
655: #&Apache::lonxml::debug("NOT Calling sub $sub in $space $metamode");
656: if ($metamode <1) {
657: if (defined($token->[4]) && ($metamode < 1)) {
658: $currentstring = $token->[4];
659: } else {
660: $currentstring = $token->[2];
661: }
662: }
663: }
664: # &Apache::lonxml::debug("nodefalt:$nodefault:");
665: if ($currentstring eq '' && $nodefault eq '') {
666: if ($target eq 'edit') {
667: #&Apache::lonxml::debug("doing default edit for $token->[1]");
668: if ($token->[0] eq 'S') {
669: $currentstring = &Apache::edit::tag_start($target,$token);
670: } elsif ($token->[0] eq 'E') {
671: $currentstring = &Apache::edit::tag_end($target,$token);
672: }
673: } elsif ($target eq 'modified') {
674: if ($token->[0] eq 'S') {
675: $currentstring = $token->[4];
676: $currentstring.=&Apache::edit::handle_insert();
677: } elsif ($token->[0] eq 'E') {
678: $currentstring = $token->[2];
679: $currentstring.=&Apache::edit::handle_insertafter($token->[1]);
680: } else {
681: $currentstring = $token->[2];
682: }
683: }
684: }
685: }
686: use strict 'refs';
687: }
688: return $currentstring;
689: }
690:
691: sub setup_globals {
692: my ($request,$target)=@_;
693: $Apache::lonxml::request=$request;
694: $Apache::lonxml::registered = 0;
695: $errorcount=0;
696: $warningcount=0;
697: $Apache::lonxml::default_homework_loaded=0;
698: $Apache::lonxml::usestyle=1;
699: &init_counter();
700: @Apache::lonxml::pwd=();
701: @Apache::lonxml::extlinks=();
702: if ($target eq 'meta') {
703: $Apache::lonxml::redirection = 0;
704: $Apache::lonxml::metamode = 1;
705: $Apache::lonxml::evaluate = 1;
706: $Apache::lonxml::import = 0;
707: } elsif ($target eq 'answer') {
708: $Apache::lonxml::redirection = 0;
709: $Apache::lonxml::metamode = 1;
710: $Apache::lonxml::evaluate = 1;
711: $Apache::lonxml::import = 1;
712: } elsif ($target eq 'grade') {
713: &startredirection;
714: $Apache::lonxml::metamode = 0;
715: $Apache::lonxml::evaluate = 1;
716: $Apache::lonxml::import = 1;
717: } elsif ($target eq 'modified') {
718: $Apache::lonxml::redirection = 0;
719: $Apache::lonxml::metamode = 0;
720: $Apache::lonxml::evaluate = 0;
721: $Apache::lonxml::import = 0;
722: } elsif ($target eq 'edit') {
723: $Apache::lonxml::redirection = 0;
724: $Apache::lonxml::metamode = 0;
725: $Apache::lonxml::evaluate = 0;
726: $Apache::lonxml::import = 0;
727: } elsif ($target eq 'analyze') {
728: $Apache::lonxml::redirection = 0;
729: $Apache::lonxml::metamode = 0;
730: $Apache::lonxml::evaluate = 1;
731: $Apache::lonxml::import = 1;
732: } else {
733: $Apache::lonxml::redirection = 0;
734: $Apache::lonxml::metamode = 0;
735: $Apache::lonxml::evaluate = 1;
736: $Apache::lonxml::import = 1;
737: }
738: }
739:
740: sub init_safespace {
741: my ($target,$safeeval,$safehole,$safeinit) = @_;
742: $safeeval->permit("entereval");
743: $safeeval->permit(":base_math");
744: $safeeval->permit("sort");
745: $safeeval->deny(":base_io");
746: $safehole->wrap(\&Apache::scripttag::xmlparse,$safeeval,'&xmlparse');
747: $safehole->wrap(\&Apache::outputtags::multipart,$safeeval,'&multipart');
748: $safehole->wrap(\&Apache::lonnet::EXT,$safeeval,'&EXT');
749:
750: $safehole->wrap(\&Math::Cephes::asin,$safeeval,'&asin');
751: $safehole->wrap(\&Math::Cephes::acos,$safeeval,'&acos');
752: $safehole->wrap(\&Math::Cephes::atan,$safeeval,'&atan');
753: $safehole->wrap(\&Math::Cephes::sinh,$safeeval,'&sinh');
754: $safehole->wrap(\&Math::Cephes::cosh,$safeeval,'&cosh');
755: $safehole->wrap(\&Math::Cephes::tanh,$safeeval,'&tanh');
756: $safehole->wrap(\&Math::Cephes::asinh,$safeeval,'&asinh');
757: $safehole->wrap(\&Math::Cephes::acosh,$safeeval,'&acosh');
758: $safehole->wrap(\&Math::Cephes::atanh,$safeeval,'&atanh');
759: $safehole->wrap(\&Math::Cephes::erf,$safeeval,'&erf');
760: $safehole->wrap(\&Math::Cephes::erfc,$safeeval,'&erfc');
761: $safehole->wrap(\&Math::Cephes::j0,$safeeval,'&j0');
762: $safehole->wrap(\&Math::Cephes::j1,$safeeval,'&j1');
763: $safehole->wrap(\&Math::Cephes::jn,$safeeval,'&jn');
764: $safehole->wrap(\&Math::Cephes::jv,$safeeval,'&jv');
765: $safehole->wrap(\&Math::Cephes::y0,$safeeval,'&y0');
766: $safehole->wrap(\&Math::Cephes::y1,$safeeval,'&y1');
767: $safehole->wrap(\&Math::Cephes::yn,$safeeval,'&yn');
768: $safehole->wrap(\&Math::Cephes::yv,$safeeval,'&yv');
769:
770: $safehole->wrap(\&Math::Cephes::bdtr ,$safeeval,'&bdtr' );
771: $safehole->wrap(\&Math::Cephes::bdtrc ,$safeeval,'&bdtrc' );
772: $safehole->wrap(\&Math::Cephes::bdtri ,$safeeval,'&bdtri' );
773: $safehole->wrap(\&Math::Cephes::btdtr ,$safeeval,'&btdtr' );
774: $safehole->wrap(\&Math::Cephes::chdtr ,$safeeval,'&chdtr' );
775: $safehole->wrap(\&Math::Cephes::chdtrc,$safeeval,'&chdtrc');
776: $safehole->wrap(\&Math::Cephes::chdtri,$safeeval,'&chdtri');
777: $safehole->wrap(\&Math::Cephes::fdtr ,$safeeval,'&fdtr' );
778: $safehole->wrap(\&Math::Cephes::fdtrc ,$safeeval,'&fdtrc' );
779: $safehole->wrap(\&Math::Cephes::fdtri ,$safeeval,'&fdtri' );
780: $safehole->wrap(\&Math::Cephes::gdtr ,$safeeval,'&gdtr' );
781: $safehole->wrap(\&Math::Cephes::gdtrc ,$safeeval,'&gdtrc' );
782: $safehole->wrap(\&Math::Cephes::nbdtr ,$safeeval,'&nbdtr' );
783: $safehole->wrap(\&Math::Cephes::nbdtrc,$safeeval,'&nbdtrc');
784: $safehole->wrap(\&Math::Cephes::nbdtri,$safeeval,'&nbdtri');
785: $safehole->wrap(\&Math::Cephes::ndtr ,$safeeval,'&ndtr' );
786: $safehole->wrap(\&Math::Cephes::ndtri ,$safeeval,'&ndtri' );
787: $safehole->wrap(\&Math::Cephes::pdtr ,$safeeval,'&pdtr' );
788: $safehole->wrap(\&Math::Cephes::pdtrc ,$safeeval,'&pdtrc' );
789: $safehole->wrap(\&Math::Cephes::pdtri ,$safeeval,'&pdtri' );
790: $safehole->wrap(\&Math::Cephes::stdtr ,$safeeval,'&stdtr' );
791: $safehole->wrap(\&Math::Cephes::stdtri,$safeeval,'&stdtri');
792:
793: # $safehole->wrap(\&Math::Cephes::new_fract,$safeeval,'&new_fract');
794: # $safehole->wrap(\&Math::Cephes::radd,$safeeval,'&radd');
795: # $safehole->wrap(\&Math::Cephes::rsub,$safeeval,'&rsub');
796: # $safehole->wrap(\&Math::Cephes::rmul,$safeeval,'&rmul');
797: # $safehole->wrap(\&Math::Cephes::rdiv,$safeeval,'&rdiv');
798: # $safehole->wrap(\&Math::Cephes::euclid,$safeeval,'&euclid');
799:
800: $safehole->wrap(\&Math::Random::random_beta,$safeeval,'&math_random_beta');
801: $safehole->wrap(\&Math::Random::random_chi_square,$safeeval,'&math_random_chi_square');
802: $safehole->wrap(\&Math::Random::random_exponential,$safeeval,'&math_random_exponential');
803: $safehole->wrap(\&Math::Random::random_f,$safeeval,'&math_random_f');
804: $safehole->wrap(\&Math::Random::random_gamma,$safeeval,'&math_random_gamma');
805: $safehole->wrap(\&Math::Random::random_multivariate_normal,$safeeval,'&math_random_multivariate_normal');
806: $safehole->wrap(\&Math::Random::random_multinomial,$safeeval,'&math_random_multinomial');
807: $safehole->wrap(\&Math::Random::random_noncentral_chi_square,$safeeval,'&math_random_noncentral_chi_square');
808: $safehole->wrap(\&Math::Random::random_noncentral_f,$safeeval,'&math_random_noncentral_f');
809: $safehole->wrap(\&Math::Random::random_normal,$safeeval,'&math_random_normal');
810: $safehole->wrap(\&Math::Random::random_permutation,$safeeval,'&math_random_permutation');
811: $safehole->wrap(\&Math::Random::random_permuted_index,$safeeval,'&math_random_permuted_index');
812: $safehole->wrap(\&Math::Random::random_uniform,$safeeval,'&math_random_uniform');
813: $safehole->wrap(\&Math::Random::random_poisson,$safeeval,'&math_random_poisson');
814: $safehole->wrap(\&Math::Random::random_uniform_integer,$safeeval,'&math_random_uniform_integer');
815: $safehole->wrap(\&Math::Random::random_negative_binomial,$safeeval,'&math_random_negative_binomial');
816: $safehole->wrap(\&Math::Random::random_binomial,$safeeval,'&math_random_binomial');
817: $safehole->wrap(\&Math::Random::random_seed_from_phrase,$safeeval,'&random_seed_from_phrase');
818: $safehole->wrap(\&Math::Random::random_set_seed_from_phrase,$safeeval,'&random_set_seed_from_phrase');
819: $safehole->wrap(\&Math::Random::random_get_seed,$safeeval,'&random_get_seed');
820: $safehole->wrap(\&Math::Random::random_set_seed,$safeeval,'&random_set_seed');
821:
822: #need to inspect this class of ops
823: # $safeeval->deny(":base_orig");
824: $safeinit .= ';$external::target="'.$target.'";';
825: my $rndseed;
826: my ($symb,$courseid,$domain,$name) = &Apache::lonxml::whichuser();
827: $rndseed=&Apache::lonnet::rndseed($symb,$courseid,$domain,$name);
828: $safeinit .= ';$external::randomseed='.$rndseed.';';
829: &Apache::lonxml::debug("Setting rndseed to $rndseed");
830: &Apache::run::run($safeinit,$safeeval);
831: }
832:
833: sub default_homework_load {
834: my ($safeeval)=@_;
835: &Apache::lonxml::debug('Loading default_homework');
836: my $default=&Apache::lonnet::getfile('/home/httpd/html/res/adm/includes/default_homework.lcpm');
837: if ($default eq -1) {
838: &Apache::lonxml::error("<b>Unable to find <i>default_homework.lcpm</i></b>");
839: } else {
840: &Apache::run::run($default,$safeeval);
841: $Apache::lonxml::default_homework_loaded=1;
842: }
843: }
844:
845: sub startredirection {
846: $Apache::lonxml::redirection++;
847: push (@Apache::lonxml::outputstack, '');
848: }
849:
850: sub endredirection {
851: if (!$Apache::lonxml::redirection) {
852: &Apache::lonxml::error("Endredirection was called, before a startredirection, perhaps you have unbalanced tags. Some debuging information:".join ":",caller);
853: return '';
854: }
855: $Apache::lonxml::redirection--;
856: pop @Apache::lonxml::outputstack;
857: }
858:
859: sub end_tag {
860: my ($tagstack,$parstack,$token)=@_;
861: pop(@$tagstack);
862: pop(@$parstack);
863: &decreasedepth($token);
864: }
865:
866: sub initdepth {
867: @Apache::lonxml::depthcounter=();
868: $Apache::lonxml::depth=-1;
869: $Apache::lonxml::olddepth=-1;
870: }
871:
872: sub increasedepth {
873: my ($token) = @_;
874: $Apache::lonxml::depth++;
875: $Apache::lonxml::depthcounter[$Apache::lonxml::depth]++;
876: if ($Apache::lonxml::depthcounter[$Apache::lonxml::depth]==1) {
877: $Apache::lonxml::olddepth=$Apache::lonxml::depth;
878: }
879: my $curdepth=join('_',@Apache::lonxml::depthcounter);
880: &Apache::lonxml::debug("s $Apache::lonxml::depth : $Apache::lonxml::olddepth : $curdepth : $token->[1]\n");
881: #print "<br />s $Apache::lonxml::depth : $Apache::lonxml::olddepth : $curdepth : $token->[1]\n";
882: }
883:
884: sub decreasedepth {
885: my ($token) = @_;
886: $Apache::lonxml::depth--;
887: if ($Apache::lonxml::depth<$Apache::lonxml::olddepth-1) {
888: $#Apache::lonxml::depthcounter--;
889: $Apache::lonxml::olddepth=$Apache::lonxml::depth+1;
890: }
891: if ( $Apache::lonxml::depth < -1) {
892: &Apache::lonxml::warning("Missing tags, unable to properly run file.");
893: $Apache::lonxml::depth='-1';
894: }
895: my $curdepth=join('_',@Apache::lonxml::depthcounter);
896: &Apache::lonxml::debug("e $Apache::lonxml::depth : $Apache::lonxml::olddepth : $token->[1] : $curdepth\n");
897: #print "<br />e $Apache::lonxml::depth : $Apache::lonxml::olddepth : $token->[1] : $curdepth\n";
898: }
899:
900: sub get_all_text_unbalanced {
901: #there is a copy of this in lonpublisher.pm
902: my($tag,$pars)= @_;
903: my $token;
904: my $result='';
905: $tag='<'.$tag.'>';
906: while ($token = $$pars[-1]->get_token) {
907: if (($token->[0] eq 'T')||($token->[0] eq 'C')||($token->[0] eq 'D')) {
908: $result.=$token->[1];
909: } elsif ($token->[0] eq 'PI') {
910: $result.=$token->[2];
911: } elsif ($token->[0] eq 'S') {
912: $result.=$token->[4];
913: } elsif ($token->[0] eq 'E') {
914: $result.=$token->[2];
915: }
916: if ($result =~ /(.*)\Q$tag\E(.*)/s) {
917: &Apache::lonxml::debug('Got a winner with leftovers ::'.$2);
918: &Apache::lonxml::debug('Result is :'.$1);
919: $result=$1;
920: my $redo=$tag.$2;
921: &Apache::lonxml::newparser($pars,\$redo);
922: last;
923: }
924: }
925: return $result
926: }
927:
928: sub increment_counter {
929: my ($increment) = @_;
930: if (defined($increment) && $increment gt 0) {
931: $Apache::lonxml::counter+=$increment;
932: } else {
933: $Apache::lonxml::counter++;
934: }
935: $Apache::lonxml::counter_changed=1;
936: }
937:
938: sub init_counter {
939: if (defined($ENV{'form.counter'})) {
940: $Apache::lonxml::counter=$ENV{'form.counter'};
941: $Apache::lonxml::counter_changed=0;
942: } else {
943: $Apache::lonxml::counter=1;
944: $Apache::lonxml::counter_changed=1;
945: }
946: }
947:
948: sub store_counter {
949: &Apache::lonnet::appenv(('form.counter' => $Apache::lonxml::counter));
950: return '';
951: }
952:
953: sub get_all_text {
954: my($tag,$pars)= @_;
955: &Apache::lonxml::debug("Got a ".ref($pars));
956: my $gotfullstack=1;
957: if (ref($pars) ne 'ARRAY') {
958: $gotfullstack=0;
959: $pars=[$pars];
960: }
961: my $depth=0;
962: my $token;
963: my $result='';
964: if ( $tag =~ m:^/: ) {
965: my $tag=substr($tag,1);
966: #&Apache::lonxml::debug("have:$tag:");
967: my $top_empty=0;
968: while (($depth >=0) && ($#$pars > -1) && (!$top_empty)) {
969: while (($depth >=0) && ($token = $$pars[-1]->get_token)) {
970: #&Apache::lonxml::debug("e token:$token->[0]:$depth:$token->[1]:".$#$pars.":".$#Apache::lonxml::pwd);
971: if (($token->[0] eq 'T')||($token->[0] eq 'C')||($token->[0] eq 'D')) {
972: $result.=$token->[1];
973: } elsif ($token->[0] eq 'PI') {
974: $result.=$token->[2];
975: } elsif ($token->[0] eq 'S') {
976: if ($token->[1] =~ /^$tag$/i) { $depth++; }
977: $result.=$token->[4];
978: } elsif ($token->[0] eq 'E') {
979: if ( $token->[1] =~ /^$tag$/i) { $depth--; }
980: #skip sending back the last end tag
981: if ($depth > -1) { $result.=$token->[2]; } else {
982: $$pars[-1]->unget_token($token);
983: }
984: }
985: }
986: if (($depth >=0) && ($#$pars == 0) ) { $top_empty=1; }
987: if (($depth >=0) && ($#$pars > 0) ) {
988: pop(@$pars);
989: pop(@Apache::lonxml::pwd);
990: }
991: }
992: if ($top_empty && $depth >= 0) {
993: #never found the end tag ran out of text, throw error send back blank
994: &error('Never found end tag for <'.$tag.'>');
995: if ($gotfullstack) {
996: my $newstring='</'.$tag.'>'.$result;
997: &Apache::lonxml::newparser($pars,\$newstring);
998: }
999: $result='';
1000: }
1001: } else {
1002: while ($#$pars > -1) {
1003: while ($token = $$pars[-1]->get_token) {
1004: #&Apache::lonxml::debug("s token:$token->[0]:$depth:$token->[1]");
1005: if (($token->[0] eq 'T')||($token->[0] eq 'C')||
1006: ($token->[0] eq 'D')) {
1007: $result.=$token->[1];
1008: } elsif ($token->[0] eq 'PI') {
1009: $result.=$token->[2];
1010: } elsif ($token->[0] eq 'S') {
1011: if ( $token->[1] =~ /^$tag$/i) {
1012: $$pars[-1]->unget_token($token); last;
1013: } else {
1014: $result.=$token->[4];
1015: }
1016: } elsif ($token->[0] eq 'E') {
1017: $result.=$token->[2];
1018: }
1019: }
1020: if (($#$pars > 0) ) {
1021: pop(@$pars);
1022: pop(@Apache::lonxml::pwd);
1023: } else { last; }
1024: }
1025: }
1026: if ($result =~ m|<LONCAPA_INTERNAL_TURN_STYLE_ON />|) {
1027: $Apache::lonxml::usestyle=1;
1028: }
1029: #&Apache::lonxml::debug("Exit:$result:");
1030: return $result
1031: }
1032:
1033: sub newparser {
1034: my ($parser,$contentref,$dir) = @_;
1035: push (@$parser,HTML::LCParser->new($contentref));
1036: $$parser['-1']->xml_mode('1');
1037: if ( $dir eq '' ) {
1038: push (@Apache::lonxml::pwd, $Apache::lonxml::pwd[$#Apache::lonxml::pwd]);
1039: } else {
1040: push (@Apache::lonxml::pwd, $dir);
1041: }
1042: }
1043:
1044: sub parstring {
1045: my ($token) = @_;
1046: my $temp='';
1047: foreach (@{$token->[3]}) {
1048: unless ($_=~/\W/) {
1049: my $val=$token->[2]->{$_};
1050: $val =~ s/([\%\@\\\"\'])/\\$1/g;
1051: #if ($val =~ m/^[\%\@]/) { $val="\\".$val; }
1052: $temp .= "my \$$_=\"$val\";"
1053: }
1054: }
1055: return $temp;
1056: }
1057:
1058: sub writeallows {
1059: unless ($#extlinks>=0) { return; }
1060: my $thisurl='/res/'.&Apache::lonnet::declutter(shift);
1061: if ($ENV{'httpref.'.$thisurl}) {
1062: $thisurl=$ENV{'httpref.'.$thisurl};
1063: }
1064: my $thisdir=$thisurl;
1065: $thisdir=~s/\/[^\/]+$//;
1066: my %httpref=();
1067: foreach (@extlinks) {
1068: $httpref{'httpref.'.
1069: &Apache::lonnet::hreflocation($thisdir,$_)}=$thisurl;
1070: }
1071: @extlinks=();
1072: &Apache::lonnet::appenv(%httpref);
1073: }
1074:
1075: #
1076: # Afterburner handles anchors, highlights and links
1077: #
1078: sub afterburn {
1079: my $result=shift;
1080: &Apache::loncommon::get_unprocessed_cgi($ENV{'QUERY_STRING'},
1081: ['highlight','anchor','link']);
1082: if ($ENV{'form.highlight'}) {
1083: foreach (split(/\,/,$ENV{'form.highlight'})) {
1084: my $anchorname=$_;
1085: my $matchthis=$anchorname;
1086: $matchthis=~s/\_+/\\s\+/g;
1087: $result=~s/($matchthis)/\<font color=\"red\"\>$1\<\/font\>/gs;
1088: }
1089: }
1090: if ($ENV{'form.link'}) {
1091: foreach (split(/\,/,$ENV{'form.link'})) {
1092: my ($anchorname,$linkurl)=split(/\>/,$_);
1093: my $matchthis=$anchorname;
1094: $matchthis=~s/\_+/\\s\+/g;
1095: $result=~s/($matchthis)/\<a href=\"$linkurl\"\>$1\<\/a\>/gs;
1096: }
1097: }
1098: if ($ENV{'form.anchor'}) {
1099: my $anchorname=$ENV{'form.anchor'};
1100: my $matchthis=$anchorname;
1101: $matchthis=~s/\_+/\\s\+/g;
1102: $result=~s/($matchthis)/\<a name=\"$anchorname\"\>$1\<\/a\>/s;
1103: $result.=(<<"ENDSCRIPT");
1104: <script type="text/javascript">
1105: document.location.hash='$anchorname';
1106: </script>
1107: ENDSCRIPT
1108: }
1109: return $result;
1110: }
1111:
1112: sub storefile {
1113: my ($file,$contents)=@_;
1114: if (my $fh=Apache::File->new('>'.$file)) {
1115: print $fh $contents;
1116: $fh->close();
1117: } else {
1118: &warning("Unable to save file $file");
1119: }
1120: }
1121:
1122: sub createnewhtml {
1123: my $filecontents=(<<SIMPLECONTENT);
1124: <html>
1125: <head>
1126: <title>
1127: Title of Document Goes Here
1128: </title>
1129: </head>
1130: <body bgcolor="#FFFFFF">
1131:
1132: Body of Document Goes Here
1133:
1134: </body>
1135: </html>
1136: SIMPLECONTENT
1137: return $filecontents;
1138: }
1139:
1140:
1141: sub inserteditinfo {
1142: my ($result,$filecontents)=@_;
1143: $filecontents = &HTML::Entities::encode($filecontents);
1144: # my $editheader='<a href="#editsection">Edit below</a><hr />';
1145: my $xml_help = Apache::loncommon::helpLatexCheatsheet();
1146: my $titledisplay=&display_title();
1147: my $buttons=(<<BUTTONS);
1148: <input type="submit" name="attemptclean"
1149: value="Save and then attempt to clean HTML" />
1150: <input type="submit" name="savethisfile" value="Save this" />
1151: <input type="submit" name="viewmode" value="View" />
1152: BUTTONS
1153: my $editfooter=(<<ENDFOOTER);
1154: <hr />
1155: <a name="editsection" />
1156: <form method="post">
1157: $xml_help
1158: <input type="hidden" name="editmode" value="Edit" />
1159: $buttons<br />
1160: <textarea cols="80" rows="40" name="filecont">$filecontents</textarea>
1161: <br />$buttons
1162: <br />
1163: </form>
1164: $titledisplay
1165: ENDFOOTER
1166: # $result=~s/(\<body[^\>]*\>)/$1$editheader/is;
1167: $result=~s/(\<\/body\>)/$editfooter/is;
1168: return $result;
1169: }
1170:
1171: sub get_target {
1172: my $viewgrades=&Apache::lonnet::allowed('vgr',$ENV{'request.course.id'});
1173: if ( $ENV{'request.state'} eq 'published') {
1174: if ( defined($ENV{'form.grade_target'})
1175: && ($viewgrades == 'F' )) {
1176: return ($ENV{'form.grade_target'});
1177: } elsif (defined($ENV{'form.grade_target'})) {
1178: if (($ENV{'form.grade_target'} eq 'web') ||
1179: ($ENV{'form.grade_target'} eq 'tex') ) {
1180: return $ENV{'form.grade_target'}
1181: } else {
1182: return 'web';
1183: }
1184: } else {
1185: return 'web';
1186: }
1187: } elsif ($ENV{'request.state'} eq 'construct') {
1188: if ( defined($ENV{'form.grade_target'})) {
1189: return ($ENV{'form.grade_target'});
1190: } else {
1191: return 'web';
1192: }
1193: } else {
1194: return 'web';
1195: }
1196: }
1197:
1198: sub handler {
1199: my $request=shift;
1200:
1201: my $target=&get_target();
1202:
1203: $Apache::lonxml::debug=$ENV{'user.debug'};
1204:
1205: if ($ENV{'browser.mathml'}) {
1206: $request->content_type('text/xml');
1207: } else {
1208: $request->content_type('text/html');
1209: }
1210: &Apache::loncommon::no_cache($request);
1211: $request->send_http_header;
1212:
1213: return OK if $request->header_only;
1214:
1215:
1216: my $file=&Apache::lonnet::filelocation("",$request->uri);
1217: #
1218: # Edit action? Save file.
1219: #
1220: unless ($ENV{'request.state'} eq 'published') {
1221: if (($ENV{'form.savethisfile'}) || ($ENV{'form.attemptclean'})) {
1222: &storefile($file,$ENV{'form.filecont'});
1223: }
1224: }
1225: my %mystyle;
1226: my $result = '';
1227: my $filecontents=&Apache::lonnet::getfile($file);
1228: if ($filecontents eq -1) {
1229: $result=(<<ENDNOTFOUND);
1230: <html>
1231: <head>
1232: <title>File not found</title>
1233: </head>
1234: <body bgcolor="#FFFFFF">
1235: <b>File not found: $file</b>
1236: </body>
1237: </html>
1238: ENDNOTFOUND
1239: $filecontents='';
1240: if ($ENV{'request.state'} ne 'published') {
1241: $filecontents=&createnewhtml();
1242: $ENV{'form.editmode'}='Edit'; #force edit mode
1243: }
1244: } else {
1245: unless ($ENV{'request.state'} eq 'published') {
1246: if ($ENV{'form.attemptclean'}) {
1247: $filecontents=&htmlclean($filecontents,1);
1248: }
1249: #
1250: # we are in construction space, see if edit mode forced
1251: &Apache::loncommon::get_unprocessed_cgi
1252: ($ENV{'QUERY_STRING'},['editmode']);
1253: }
1254: if (!$ENV{'form.editmode'} || $ENV{'form.viewmode'}) {
1255: $result = &Apache::lonxml::xmlparse($request,$target,$filecontents,
1256: '',%mystyle);
1257: }
1258: }
1259:
1260: #
1261: # Edit action? Insert editing commands
1262: #
1263: unless ($ENV{'request.state'} eq 'published') {
1264: if ($ENV{'form.editmode'} && (!($ENV{'form.viewmode'}))) {
1265: my $displayfile=$request->uri;
1266: $displayfile=~s/^\/[^\/]*//;
1267: $result='<html><body bgcolor="#FFFFFF"><h3>'.$displayfile.
1268: '</h3></body></html>';
1269: $result=&inserteditinfo($result,$filecontents);
1270: }
1271: }
1272:
1273: writeallows($request->uri);
1274:
1275:
1276: $request->print($result);
1277:
1278: return OK;
1279: }
1280:
1281: sub display_title {
1282: my $result;
1283: if ($ENV{'request.state'} eq 'construct') {
1284: my $title=&Apache::lonnet::gettitle();
1285: if (!defined($title) || $title eq '') {
1286: $title = $ENV{'request.filename'};
1287: $title = substr($title, rindex($title, '/') + 1);
1288: }
1289: $result = "<script type='text/javascript'>top.document.title = '$title - LON-CAPA Construction Space';</script>";
1290: }
1291: return $result;
1292: }
1293:
1294: sub debug {
1295: if ($Apache::lonxml::debug eq 1) {
1296: $|=1;
1297: print('<font size="-2"<pre>DEBUG:'.&HTML::Entities::encode($_[0])."</pre></font>\n");
1298: }
1299: }
1300:
1301: sub error {
1302: $errorcount++;
1303: if (($Apache::lonxml::debug eq 1) || ($ENV{'request.state'} eq 'construct') ) {
1304: # If printing in construction space, put the error inside <pre></pre>
1305: print "<b>ERROR:</b>".join("\n",@_)."\n";
1306: } else {
1307: print "<b>An Error occured while processing this resource. The instructor has been notified.</b> <br />";
1308: #notify author
1309: &Apache::lonmsg::author_res_msg($ENV{'request.filename'},join('<br />',@_));
1310: #notify course
1311: if ( $ENV{'request.course.id'} ) {
1312: my (undef,%users)=&Apache::lonfeedback::decide_receiver(undef,0,1,1,1);
1313: my $declutter=&Apache::lonnet::declutter($ENV{'request.filename'});
1314: foreach (keys %users) {
1315: my ($user,$domain) = split(/:/, $_);
1316: &Apache::lonmsg::user_normal_msg($user,$domain,
1317: "Error [$declutter]",join('<br />',@_));
1318: }
1319: }
1320:
1321: #FIXME probably shouldn't have me get everything forever.
1322: &Apache::lonmsg::user_normal_msg('albertel','msu',"Error in $ENV{'request.filename'}",join('<br />',@_));
1323: #&Apache::lonmsg::user_normal_msg('albertel','103',"Error in $ENV{'request.filename'}",$_[0]);
1324: }
1325: }
1326:
1327: sub warning {
1328: $warningcount++;
1329:
1330: if ($ENV{'form.grade_target'} ne 'tex') {
1331: if ($ENV{'request.state'} eq 'construct' || $Apache::lonxml::debug) {
1332: print "<b>W</b>ARNING<b>:</b>".join('<br />',@_)."<br />\n";
1333: }
1334: }
1335: }
1336:
1337: sub get_param {
1338: my ($param,$parstack,$safeeval,$context,$case_insensitive) = @_;
1339: if ( ! $context ) { $context = -1; }
1340: my $args ='';
1341: if ( $#$parstack > (-2-$context) ) { $args=$$parstack[$context]; }
1342: if ( ! $args ) { return undef; }
1343: if ( $case_insensitive ) {
1344: if ($args =~ s/(my \$)(\Q$param\E)(=\")/$1.lc($2).$3/ei) {
1345: return &Apache::run::run("{$args;".'return $'.$param.'}',
1346: $safeeval); #'
1347: } else {
1348: return undef;
1349: }
1350: } else {
1351: if ( $args =~ /my \$\Q$param\E=\"/ ) {
1352: return &Apache::run::run("{$args;".'return $'.$param.'}',
1353: $safeeval); #'
1354: } else {
1355: return undef;
1356: }
1357: }
1358: }
1359:
1360: sub get_param_var {
1361: my ($param,$parstack,$safeeval,$context,$case_insensitive) = @_;
1362: if ( ! $context ) { $context = -1; }
1363: my $args ='';
1364: if ( $#$parstack > (-2-$context) ) { $args=$$parstack[$context]; }
1365: &Apache::lonxml::debug("Args are $args param is $param");
1366: if ($case_insensitive) {
1367: if (! ($args=~s/(my \$)(\Q$param\E)(=\")/$1.lc($2).$3/ei)) {
1368: return undef;
1369: }
1370: } elsif ( $args !~ /my \$\Q$param\E=\"/ ) { return undef; }
1371: my $value=&Apache::run::run("{$args;".'return $'.$param.'}',$safeeval); #'
1372: &Apache::lonxml::debug("first run is $value");
1373: if ($value =~ /^[\$\@\%]\w+$/) {
1374: &Apache::lonxml::debug("doing second");
1375: my @result=&Apache::run::run("return $value",$safeeval,1);
1376: if (!defined($result[0])) {
1377: return $value
1378: } else {
1379: if (wantarray) { return @result; } else { return $result[0]; }
1380: }
1381: } else {
1382: return $value;
1383: }
1384: }
1385:
1386: sub register_insert {
1387: my @data = split /\n/, &Apache::lonnet::getfile('/home/httpd/lonTabs/insertlist.tab');
1388: my $i;
1389: my $tagnum=0;
1390: my @order;
1391: for ($i=0;$i < $#data; $i++) {
1392: my $line = $data[$i];
1393: if ( $line =~ /^\#/ || $line =~ /^\s*\n/) { next; }
1394: if ( $line =~ /TABLE/ ) { last; }
1395: my ($tag,$descrip,$color,$function,$show) = split(/,/, $line);
1396: if ($tag) {
1397: $insertlist{"$tagnum.tag"} = $tag;
1398: $insertlist{"$tagnum.description"} = $descrip;
1399: $insertlist{"$tagnum.color"} = $color;
1400: $insertlist{"$tagnum.function"} = $function;
1401: if (!defined($show)) { $show='yes'; }
1402: $insertlist{"$tagnum.show"}= $show;
1403: $insertlist{"$tag.num"}=$tagnum;
1404: $tagnum++;
1405: }
1406: }
1407: $i++; #skipping TABLE line
1408: $tagnum = 0;
1409: for (;$i < $#data;$i++) {
1410: my $line = $data[$i];
1411: my ($mnemonic,@which) = split(/ +/,$line);
1412: my $tag = $insertlist{"$tagnum.tag"};
1413: for (my $j=0;$j <=$#which;$j++) {
1414: if ( $which[$j] eq 'Y' ) {
1415: if ($insertlist{"$j.show"} ne 'no') {
1416: push(@{ $insertlist{"$tag.which"} },$j);
1417: }
1418: }
1419: }
1420: $tagnum++;
1421: }
1422: }
1423:
1424: sub description {
1425: my ($token)=@_;
1426: my $tagnum;
1427: my $tag=$token->[1];
1428: foreach my $namespace (reverse @Apache::lonxml::namespace) {
1429: my $testtag=$namespace.'::'.$tag;
1430: $tagnum=$insertlist{"$testtag.num"};
1431: if (defined($tagnum)) { last; }
1432: }
1433: if (!defined ($tagnum)) { $tagnum=$Apache::lonxml::insertlist{"$tag.num"}; }
1434: return $insertlist{$tagnum.'.description'};
1435: }
1436:
1437: # ----------------------------------------------------------------- whichuser
1438: # returns a list of $symb, $courseid, $domain, $name that is correct for
1439: # calls to lonnet functions for this setup.
1440: # - looks for form.grade_ parameters
1441: sub whichuser {
1442: my ($passedsymb)=@_;
1443: my ($symb,$courseid,$domain,$name,$publicuser);
1444: if (defined($ENV{'form.grade_symb'})) {
1445: my $tmp_courseid=$ENV{'form.grade_courseid'};
1446: my $allowed=&Apache::lonnet::allowed('vgr',$tmp_courseid);
1447: if ($allowed) {
1448: $symb=$ENV{'form.grade_symb'};
1449: $courseid=$ENV{'form.grade_courseid'};
1450: $domain=$ENV{'form.grade_domain'};
1451: $name=$ENV{'form.grade_username'};
1452: }
1453: } else {
1454: if (!$passedsymb) {
1455: $symb=&Apache::lonnet::symbread();
1456: } else {
1457: $symb=$passedsymb;
1458: }
1459: $courseid=$ENV{'request.course.id'};
1460: $domain=$ENV{'user.domain'};
1461: $name=$ENV{'user.name'};
1462: if ($name eq 'public' && $domain eq 'public') {
1463: if (!defined($ENV{'form.username'})) {
1464: $ENV{'form.username'}.=time.rand(10000000);
1465: }
1466: $name.=$ENV{'form.username'};
1467: }
1468: }
1469: return ($symb,$courseid,$domain,$name,$publicuser);
1470: }
1471:
1472: 1;
1473: __END__
1474:
1475:
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