1: # The LearningOnline Network with CAPA
2: # XML Parser Module
3: #
4: # $Id: lonxml.pm,v 1.269 2003/08/06 17:00:30 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)%/$1\\%/g;} #persent after space
495: if ($current_token eq '%.') {$current_token = '\%.';} #persent at the end of statement
496: }
497: return $current_token;
498: }
499:
500: sub inner_xmlparse {
501: my ($target,$stack,$parstack,$pars,$safeeval,$style_for_target)=@_;
502: my $finaloutput = '';
503: my $result;
504: my $token;
505: my $dontpop=0;
506: while ( $#$pars > -1 ) {
507: while ($token = $$pars['-1']->get_token) {
508: if (($token->[0] eq 'T') || ($token->[0] eq 'C') ) {
509: if ($metamode<1) {
510: my $text=$token->[1];
511: if ($token->[0] eq 'C' && $target eq 'tex') {
512: $text = '';
513: # $text = '%'.$text."\n";
514: }
515: $result.=$text;
516: }
517: } elsif (($token->[0] eq 'D')) {
518: if ($metamode<1 && $target eq 'web') {
519: my $text=$token->[1];
520: $result.=$text;
521: }
522: } elsif ($token->[0] eq 'PI') {
523: if ($metamode<1 && $target eq 'web') {
524: $result=$token->[2];
525: }
526: } elsif ($token->[0] eq 'S') {
527: # add tag to stack
528: push (@$stack,$token->[1]);
529: # add parameters list to another stack
530: push (@$parstack,&parstring($token));
531: &increasedepth($token);
532: if ($Apache::lonxml::usestyle &&
533: exists($$style_for_target{$token->[1]})) {
534: $Apache::lonxml::usestyle=0;
535: my $string=$$style_for_target{$token->[1]}.
536: '<LONCAPA_INTERNAL_TURN_STYLE_ON />';
537: &Apache::lonxml::newparser($pars,\$string);
538: $Apache::lonxml::style_values=$$parstack[-1];
539: $Apache::lonxml::style_end_values=$$parstack[-1];
540: } else {
541: $result = &callsub("start_$token->[1]", $target, $token, $stack,
542: $parstack, $pars, $safeeval, $style_for_target);
543: }
544: } elsif ($token->[0] eq 'E') {
545: if ($Apache::lonxml::usestyle &&
546: exists($$style_for_target{'/'."$token->[1]"})) {
547: $Apache::lonxml::usestyle=0;
548: my $string=$$style_for_target{'/'.$token->[1]}.
549: '<LONCAPA_INTERNAL_TURN_STYLE_ON end="'.$token->[1].'" />';
550: &Apache::lonxml::newparser($pars,\$string);
551: $Apache::lonxml::style_values=$Apache::lonxml::style_end_values;
552: $Apache::lonxml::style_end_values='';
553: $dontpop=1;
554: } else {
555: #clear out any tags that didn't end
556: while ($token->[1] ne $$stack['-1'] && ($#$stack > -1)) {
557: my $lasttag=$$stack[-1];
558: if ($token->[1] =~ /^$lasttag$/i) {
559: &Apache::lonxml::warning('Using tag </'.$token->[1].'> on line '.$token->[3].' as end tag to <'.$$stack[-1].'>');
560: last;
561: } else {
562: &Apache::lonxml::warning('Found tag </'.$token->[1].'> on line '.$token->[3].' when looking for </'.$$stack[-1].'> in file');
563: &end_tag($stack,$parstack,$token);
564: }
565: }
566: $result = &callsub("end_$token->[1]", $target, $token, $stack,
567: $parstack, $pars,$safeeval, $style_for_target);
568: }
569: } else {
570: &Apache::lonxml::error("Unknown token event :$token->[0]:$token->[1]:");
571: }
572: #evaluate variable refs in result
573: if ($result ne "") {
574: my $extras;
575: if (!$Apache::lonxml::usestyle) {
576: $extras=$Apache::lonxml::style_values;
577: }
578: if ( $#$parstack > -1 ) {
579: $result=&Apache::run::evaluate($result,$safeeval,$extras.$$parstack[-1]);
580: } else {
581: $result= &Apache::run::evaluate($result,$safeeval,$extras);
582: }
583: }
584: if (($token->[0] eq 'T') || ($token->[0] eq 'C') || ($token->[0] eq 'D') ) {
585: #Style file definitions should be correct
586: if ($target eq 'tex' && ($Apache::lonxml::usestyle)) {
587: $result=&latex_special_symbols($result,$stack,$parstack);
588: }
589: }
590:
591: # Encode any high ASCII characters
592: if (!$Apache::lonxml::prevent_entity_encode) {
593: $result=&HTML::Entities::encode($result,"\200-\377");
594: }
595: if ($Apache::lonxml::redirection) {
596: $Apache::lonxml::outputstack['-1'] .= $result;
597: } else {
598: $finaloutput.=$result;
599: }
600: $result = '';
601:
602: if ($token->[0] eq 'E' && !$dontpop) {
603: &end_tag($stack,$parstack,$token);
604: }
605: $dontpop=0;
606: }
607: if ($#$pars > -1) {
608: pop @$pars;
609: pop @Apache::lonxml::pwd;
610: }
611: }
612:
613: # if ($target eq 'meta') {
614: # $finaloutput.=&endredirection;
615: # }
616:
617:
618: if (($ENV{'QUERY_STRING'}) && ($target eq 'web')) {
619: $finaloutput=&afterburn($finaloutput);
620: }
621: return $finaloutput;
622: }
623:
624: sub callsub {
625: my ($sub,$target,$token,$tagstack,$parstack,$parser,$safeeval,$style)=@_;
626: my $currentstring='';
627: my $nodefault;
628: {
629: my $sub1;
630: no strict 'refs';
631: my $tag=$token->[1];
632: # get utterly rid of extended html tags
633: if ($tag=~/^x\-/i) { return ''; }
634: my $space=$Apache::lonxml::alltags{$tag}[-1];
635: if (!$space) {
636: $tag=~tr/A-Z/a-z/;
637: $sub=~tr/A-Z/a-z/;
638: $space=$Apache::lonxml::alltags{$tag}[-1]
639: }
640:
641: my $deleted=0;
642: $Apache::lonxml::curdepth=join('_',@Apache::lonxml::depthcounter);
643: if (($token->[0] eq 'S') && ($target eq 'modified')) {
644: $deleted=&Apache::edit::handle_delete($space,$target,$token,$tagstack,
645: $parstack,$parser,$safeeval,
646: $style);
647: }
648: if (!$deleted) {
649: if ($space) {
650: #&Apache::lonxml::debug("Calling sub $sub in $space $metamode");
651: $sub1="$space\:\:$sub";
652: ($currentstring,$nodefault) = &$sub1($target,$token,$tagstack,
653: $parstack,$parser,$safeeval,
654: $style);
655: } else {
656: #&Apache::lonxml::debug("NOT Calling sub $sub in $space $metamode");
657: if ($metamode <1) {
658: if (defined($token->[4]) && ($metamode < 1)) {
659: $currentstring = $token->[4];
660: } else {
661: $currentstring = $token->[2];
662: }
663: }
664: }
665: # &Apache::lonxml::debug("nodefalt:$nodefault:");
666: if ($currentstring eq '' && $nodefault eq '') {
667: if ($target eq 'edit') {
668: #&Apache::lonxml::debug("doing default edit for $token->[1]");
669: if ($token->[0] eq 'S') {
670: $currentstring = &Apache::edit::tag_start($target,$token);
671: } elsif ($token->[0] eq 'E') {
672: $currentstring = &Apache::edit::tag_end($target,$token);
673: }
674: } elsif ($target eq 'modified') {
675: if ($token->[0] eq 'S') {
676: $currentstring = $token->[4];
677: $currentstring.=&Apache::edit::handle_insert();
678: } elsif ($token->[0] eq 'E') {
679: $currentstring = $token->[2];
680: $currentstring.=&Apache::edit::handle_insertafter($token->[1]);
681: } else {
682: $currentstring = $token->[2];
683: }
684: }
685: }
686: }
687: use strict 'refs';
688: }
689: return $currentstring;
690: }
691:
692: sub setup_globals {
693: my ($request,$target)=@_;
694: $Apache::lonxml::request=$request;
695: $Apache::lonxml::registered = 0;
696: $errorcount=0;
697: $warningcount=0;
698: $Apache::lonxml::default_homework_loaded=0;
699: $Apache::lonxml::usestyle=1;
700: &init_counter();
701: @Apache::lonxml::pwd=();
702: @Apache::lonxml::extlinks=();
703: if ($target eq 'meta') {
704: $Apache::lonxml::redirection = 0;
705: $Apache::lonxml::metamode = 1;
706: $Apache::lonxml::evaluate = 1;
707: $Apache::lonxml::import = 0;
708: } elsif ($target eq 'answer') {
709: $Apache::lonxml::redirection = 0;
710: $Apache::lonxml::metamode = 1;
711: $Apache::lonxml::evaluate = 1;
712: $Apache::lonxml::import = 1;
713: } elsif ($target eq 'grade') {
714: &startredirection;
715: $Apache::lonxml::metamode = 0;
716: $Apache::lonxml::evaluate = 1;
717: $Apache::lonxml::import = 1;
718: } elsif ($target eq 'modified') {
719: $Apache::lonxml::redirection = 0;
720: $Apache::lonxml::metamode = 0;
721: $Apache::lonxml::evaluate = 0;
722: $Apache::lonxml::import = 0;
723: } elsif ($target eq 'edit') {
724: $Apache::lonxml::redirection = 0;
725: $Apache::lonxml::metamode = 0;
726: $Apache::lonxml::evaluate = 0;
727: $Apache::lonxml::import = 0;
728: } elsif ($target eq 'analyze') {
729: $Apache::lonxml::redirection = 0;
730: $Apache::lonxml::metamode = 0;
731: $Apache::lonxml::evaluate = 1;
732: $Apache::lonxml::import = 1;
733: } else {
734: $Apache::lonxml::redirection = 0;
735: $Apache::lonxml::metamode = 0;
736: $Apache::lonxml::evaluate = 1;
737: $Apache::lonxml::import = 1;
738: }
739: }
740:
741: sub init_safespace {
742: my ($target,$safeeval,$safehole,$safeinit) = @_;
743: $safeeval->permit("entereval");
744: $safeeval->permit(":base_math");
745: $safeeval->permit("sort");
746: $safeeval->deny(":base_io");
747: $safehole->wrap(\&Apache::scripttag::xmlparse,$safeeval,'&xmlparse');
748: $safehole->wrap(\&Apache::outputtags::multipart,$safeeval,'&multipart');
749: $safehole->wrap(\&Apache::lonnet::EXT,$safeeval,'&EXT');
750:
751: $safehole->wrap(\&Math::Cephes::asin,$safeeval,'&asin');
752: $safehole->wrap(\&Math::Cephes::acos,$safeeval,'&acos');
753: $safehole->wrap(\&Math::Cephes::atan,$safeeval,'&atan');
754: $safehole->wrap(\&Math::Cephes::sinh,$safeeval,'&sinh');
755: $safehole->wrap(\&Math::Cephes::cosh,$safeeval,'&cosh');
756: $safehole->wrap(\&Math::Cephes::tanh,$safeeval,'&tanh');
757: $safehole->wrap(\&Math::Cephes::asinh,$safeeval,'&asinh');
758: $safehole->wrap(\&Math::Cephes::acosh,$safeeval,'&acosh');
759: $safehole->wrap(\&Math::Cephes::atanh,$safeeval,'&atanh');
760: $safehole->wrap(\&Math::Cephes::erf,$safeeval,'&erf');
761: $safehole->wrap(\&Math::Cephes::erfc,$safeeval,'&erfc');
762: $safehole->wrap(\&Math::Cephes::j0,$safeeval,'&j0');
763: $safehole->wrap(\&Math::Cephes::j1,$safeeval,'&j1');
764: $safehole->wrap(\&Math::Cephes::jn,$safeeval,'&jn');
765: $safehole->wrap(\&Math::Cephes::jv,$safeeval,'&jv');
766: $safehole->wrap(\&Math::Cephes::y0,$safeeval,'&y0');
767: $safehole->wrap(\&Math::Cephes::y1,$safeeval,'&y1');
768: $safehole->wrap(\&Math::Cephes::yn,$safeeval,'&yn');
769: $safehole->wrap(\&Math::Cephes::yv,$safeeval,'&yv');
770:
771: $safehole->wrap(\&Math::Cephes::bdtr ,$safeeval,'&bdtr' );
772: $safehole->wrap(\&Math::Cephes::bdtrc ,$safeeval,'&bdtrc' );
773: $safehole->wrap(\&Math::Cephes::bdtri ,$safeeval,'&bdtri' );
774: $safehole->wrap(\&Math::Cephes::btdtr ,$safeeval,'&btdtr' );
775: $safehole->wrap(\&Math::Cephes::chdtr ,$safeeval,'&chdtr' );
776: $safehole->wrap(\&Math::Cephes::chdtrc,$safeeval,'&chdtrc');
777: $safehole->wrap(\&Math::Cephes::chdtri,$safeeval,'&chdtri');
778: $safehole->wrap(\&Math::Cephes::fdtr ,$safeeval,'&fdtr' );
779: $safehole->wrap(\&Math::Cephes::fdtrc ,$safeeval,'&fdtrc' );
780: $safehole->wrap(\&Math::Cephes::fdtri ,$safeeval,'&fdtri' );
781: $safehole->wrap(\&Math::Cephes::gdtr ,$safeeval,'&gdtr' );
782: $safehole->wrap(\&Math::Cephes::gdtrc ,$safeeval,'&gdtrc' );
783: $safehole->wrap(\&Math::Cephes::nbdtr ,$safeeval,'&nbdtr' );
784: $safehole->wrap(\&Math::Cephes::nbdtrc,$safeeval,'&nbdtrc');
785: $safehole->wrap(\&Math::Cephes::nbdtri,$safeeval,'&nbdtri');
786: $safehole->wrap(\&Math::Cephes::ndtr ,$safeeval,'&ndtr' );
787: $safehole->wrap(\&Math::Cephes::ndtri ,$safeeval,'&ndtri' );
788: $safehole->wrap(\&Math::Cephes::pdtr ,$safeeval,'&pdtr' );
789: $safehole->wrap(\&Math::Cephes::pdtrc ,$safeeval,'&pdtrc' );
790: $safehole->wrap(\&Math::Cephes::pdtri ,$safeeval,'&pdtri' );
791: $safehole->wrap(\&Math::Cephes::stdtr ,$safeeval,'&stdtr' );
792: $safehole->wrap(\&Math::Cephes::stdtri,$safeeval,'&stdtri');
793:
794: # $safehole->wrap(\&Math::Cephes::new_fract,$safeeval,'&new_fract');
795: # $safehole->wrap(\&Math::Cephes::radd,$safeeval,'&radd');
796: # $safehole->wrap(\&Math::Cephes::rsub,$safeeval,'&rsub');
797: # $safehole->wrap(\&Math::Cephes::rmul,$safeeval,'&rmul');
798: # $safehole->wrap(\&Math::Cephes::rdiv,$safeeval,'&rdiv');
799: # $safehole->wrap(\&Math::Cephes::euclid,$safeeval,'&euclid');
800:
801: $safehole->wrap(\&Math::Random::random_beta,$safeeval,'&math_random_beta');
802: $safehole->wrap(\&Math::Random::random_chi_square,$safeeval,'&math_random_chi_square');
803: $safehole->wrap(\&Math::Random::random_exponential,$safeeval,'&math_random_exponential');
804: $safehole->wrap(\&Math::Random::random_f,$safeeval,'&math_random_f');
805: $safehole->wrap(\&Math::Random::random_gamma,$safeeval,'&math_random_gamma');
806: $safehole->wrap(\&Math::Random::random_multivariate_normal,$safeeval,'&math_random_multivariate_normal');
807: $safehole->wrap(\&Math::Random::random_multinomial,$safeeval,'&math_random_multinomial');
808: $safehole->wrap(\&Math::Random::random_noncentral_chi_square,$safeeval,'&math_random_noncentral_chi_square');
809: $safehole->wrap(\&Math::Random::random_noncentral_f,$safeeval,'&math_random_noncentral_f');
810: $safehole->wrap(\&Math::Random::random_normal,$safeeval,'&math_random_normal');
811: $safehole->wrap(\&Math::Random::random_permutation,$safeeval,'&math_random_permutation');
812: $safehole->wrap(\&Math::Random::random_permuted_index,$safeeval,'&math_random_permuted_index');
813: $safehole->wrap(\&Math::Random::random_uniform,$safeeval,'&math_random_uniform');
814: $safehole->wrap(\&Math::Random::random_poisson,$safeeval,'&math_random_poisson');
815: $safehole->wrap(\&Math::Random::random_uniform_integer,$safeeval,'&math_random_uniform_integer');
816: $safehole->wrap(\&Math::Random::random_negative_binomial,$safeeval,'&math_random_negative_binomial');
817: $safehole->wrap(\&Math::Random::random_binomial,$safeeval,'&math_random_binomial');
818: $safehole->wrap(\&Math::Random::random_seed_from_phrase,$safeeval,'&random_seed_from_phrase');
819: $safehole->wrap(\&Math::Random::random_set_seed_from_phrase,$safeeval,'&random_set_seed_from_phrase');
820: $safehole->wrap(\&Math::Random::random_get_seed,$safeeval,'&random_get_seed');
821: $safehole->wrap(\&Math::Random::random_set_seed,$safeeval,'&random_set_seed');
822:
823: #need to inspect this class of ops
824: # $safeeval->deny(":base_orig");
825: $safeinit .= ';$external::target="'.$target.'";';
826: my $rndseed;
827: my ($symb,$courseid,$domain,$name) = &Apache::lonxml::whichuser();
828: $rndseed=&Apache::lonnet::rndseed($symb,$courseid,$domain,$name);
829: $safeinit .= ';$external::randomseed='.$rndseed.';';
830: &Apache::lonxml::debug("Setting rndseed to $rndseed");
831: &Apache::run::run($safeinit,$safeeval);
832: }
833:
834: sub default_homework_load {
835: my ($safeeval)=@_;
836: &Apache::lonxml::debug('Loading default_homework');
837: my $default=&Apache::lonnet::getfile('/home/httpd/html/res/adm/includes/default_homework.lcpm');
838: if ($default eq -1) {
839: &Apache::lonxml::error("<b>Unable to find <i>default_homework.lcpm</i></b>");
840: } else {
841: &Apache::run::run($default,$safeeval);
842: $Apache::lonxml::default_homework_loaded=1;
843: }
844: }
845:
846: sub startredirection {
847: $Apache::lonxml::redirection++;
848: push (@Apache::lonxml::outputstack, '');
849: }
850:
851: sub endredirection {
852: if (!$Apache::lonxml::redirection) {
853: &Apache::lonxml::error("Endredirection was called, before a startredirection, perhaps you have unbalanced tags. Some debuging information:".join ":",caller);
854: return '';
855: }
856: $Apache::lonxml::redirection--;
857: pop @Apache::lonxml::outputstack;
858: }
859:
860: sub end_tag {
861: my ($tagstack,$parstack,$token)=@_;
862: pop(@$tagstack);
863: pop(@$parstack);
864: &decreasedepth($token);
865: }
866:
867: sub initdepth {
868: @Apache::lonxml::depthcounter=();
869: $Apache::lonxml::depth=-1;
870: $Apache::lonxml::olddepth=-1;
871: }
872:
873: sub increasedepth {
874: my ($token) = @_;
875: $Apache::lonxml::depth++;
876: $Apache::lonxml::depthcounter[$Apache::lonxml::depth]++;
877: if ($Apache::lonxml::depthcounter[$Apache::lonxml::depth]==1) {
878: $Apache::lonxml::olddepth=$Apache::lonxml::depth;
879: }
880: my $curdepth=join('_',@Apache::lonxml::depthcounter);
881: &Apache::lonxml::debug("s $Apache::lonxml::depth : $Apache::lonxml::olddepth : $curdepth : $token->[1]\n");
882: #print "<br />s $Apache::lonxml::depth : $Apache::lonxml::olddepth : $curdepth : $token->[1]\n";
883: }
884:
885: sub decreasedepth {
886: my ($token) = @_;
887: $Apache::lonxml::depth--;
888: if ($Apache::lonxml::depth<$Apache::lonxml::olddepth-1) {
889: $#Apache::lonxml::depthcounter--;
890: $Apache::lonxml::olddepth=$Apache::lonxml::depth+1;
891: }
892: if ( $Apache::lonxml::depth < -1) {
893: &Apache::lonxml::warning("Missing tags, unable to properly run file.");
894: $Apache::lonxml::depth='-1';
895: }
896: my $curdepth=join('_',@Apache::lonxml::depthcounter);
897: &Apache::lonxml::debug("e $Apache::lonxml::depth : $Apache::lonxml::olddepth : $token->[1] : $curdepth\n");
898: #print "<br />e $Apache::lonxml::depth : $Apache::lonxml::olddepth : $token->[1] : $curdepth\n";
899: }
900:
901: sub get_all_text_unbalanced {
902: #there is a copy of this in lonpublisher.pm
903: my($tag,$pars)= @_;
904: my $token;
905: my $result='';
906: $tag='<'.$tag.'>';
907: while ($token = $$pars[-1]->get_token) {
908: if (($token->[0] eq 'T')||($token->[0] eq 'C')||($token->[0] eq 'D')) {
909: $result.=$token->[1];
910: } elsif ($token->[0] eq 'PI') {
911: $result.=$token->[2];
912: } elsif ($token->[0] eq 'S') {
913: $result.=$token->[4];
914: } elsif ($token->[0] eq 'E') {
915: $result.=$token->[2];
916: }
917: if ($result =~ /(.*)\Q$tag\E(.*)/s) {
918: &Apache::lonxml::debug('Got a winner with leftovers ::'.$2);
919: &Apache::lonxml::debug('Result is :'.$1);
920: $result=$1;
921: my $redo=$tag.$2;
922: &Apache::lonxml::newparser($pars,\$redo);
923: last;
924: }
925: }
926: return $result
927: }
928:
929: sub increment_counter {
930: my ($increment) = @_;
931: if (defined($increment) && $increment gt 0) {
932: $Apache::lonxml::counter+=$increment;
933: } else {
934: $Apache::lonxml::counter++;
935: }
936: $Apache::lonxml::counter_changed=1;
937: }
938:
939: sub init_counter {
940: if (defined($ENV{'form.counter'})) {
941: $Apache::lonxml::counter=$ENV{'form.counter'};
942: $Apache::lonxml::counter_changed=0;
943: } else {
944: $Apache::lonxml::counter=1;
945: $Apache::lonxml::counter_changed=1;
946: }
947: }
948:
949: sub store_counter {
950: &Apache::lonnet::appenv(('form.counter' => $Apache::lonxml::counter));
951: return '';
952: }
953:
954: sub get_all_text {
955: my($tag,$pars)= @_;
956: &Apache::lonxml::debug("Got a ".ref($pars));
957: my $gotfullstack=1;
958: if (ref($pars) ne 'ARRAY') {
959: $gotfullstack=0;
960: $pars=[$pars];
961: }
962: my $depth=0;
963: my $token;
964: my $result='';
965: if ( $tag =~ m:^/: ) {
966: my $tag=substr($tag,1);
967: #&Apache::lonxml::debug("have:$tag:");
968: my $top_empty=0;
969: while (($depth >=0) && ($#$pars > -1) && (!$top_empty)) {
970: while (($depth >=0) && ($token = $$pars[-1]->get_token)) {
971: #&Apache::lonxml::debug("e token:$token->[0]:$depth:$token->[1]:".$#$pars.":".$#Apache::lonxml::pwd);
972: if (($token->[0] eq 'T')||($token->[0] eq 'C')||($token->[0] eq 'D')) {
973: $result.=$token->[1];
974: } elsif ($token->[0] eq 'PI') {
975: $result.=$token->[2];
976: } elsif ($token->[0] eq 'S') {
977: if ($token->[1] =~ /^$tag$/i) { $depth++; }
978: $result.=$token->[4];
979: } elsif ($token->[0] eq 'E') {
980: if ( $token->[1] =~ /^$tag$/i) { $depth--; }
981: #skip sending back the last end tag
982: if ($depth > -1) { $result.=$token->[2]; } else {
983: $$pars[-1]->unget_token($token);
984: }
985: }
986: }
987: if (($depth >=0) && ($#$pars == 0) ) { $top_empty=1; }
988: if (($depth >=0) && ($#$pars > 0) ) {
989: pop(@$pars);
990: pop(@Apache::lonxml::pwd);
991: }
992: }
993: if ($top_empty && $depth >= 0) {
994: #never found the end tag ran out of text, throw error send back blank
995: &error('Never found end tag for <'.$tag.'>');
996: if ($gotfullstack) {
997: my $newstring='</'.$tag.'>'.$result;
998: &Apache::lonxml::newparser($pars,\$newstring);
999: }
1000: $result='';
1001: }
1002: } else {
1003: while ($#$pars > -1) {
1004: while ($token = $$pars[-1]->get_token) {
1005: #&Apache::lonxml::debug("s token:$token->[0]:$depth:$token->[1]");
1006: if (($token->[0] eq 'T')||($token->[0] eq 'C')||
1007: ($token->[0] eq 'D')) {
1008: $result.=$token->[1];
1009: } elsif ($token->[0] eq 'PI') {
1010: $result.=$token->[2];
1011: } elsif ($token->[0] eq 'S') {
1012: if ( $token->[1] =~ /^$tag$/i) {
1013: $$pars[-1]->unget_token($token); last;
1014: } else {
1015: $result.=$token->[4];
1016: }
1017: } elsif ($token->[0] eq 'E') {
1018: $result.=$token->[2];
1019: }
1020: }
1021: if (($#$pars > 0) ) {
1022: pop(@$pars);
1023: pop(@Apache::lonxml::pwd);
1024: } else { last; }
1025: }
1026: }
1027: if ($result =~ m|<LONCAPA_INTERNAL_TURN_STYLE_ON />|) {
1028: $Apache::lonxml::usestyle=1;
1029: }
1030: #&Apache::lonxml::debug("Exit:$result:");
1031: return $result
1032: }
1033:
1034: sub newparser {
1035: my ($parser,$contentref,$dir) = @_;
1036: push (@$parser,HTML::LCParser->new($contentref));
1037: $$parser['-1']->xml_mode('1');
1038: if ( $dir eq '' ) {
1039: push (@Apache::lonxml::pwd, $Apache::lonxml::pwd[$#Apache::lonxml::pwd]);
1040: } else {
1041: push (@Apache::lonxml::pwd, $dir);
1042: }
1043: }
1044:
1045: sub parstring {
1046: my ($token) = @_;
1047: my $temp='';
1048: foreach (@{$token->[3]}) {
1049: unless ($_=~/\W/) {
1050: my $val=$token->[2]->{$_};
1051: $val =~ s/([\%\@\\\"\'])/\\$1/g;
1052: #if ($val =~ m/^[\%\@]/) { $val="\\".$val; }
1053: $temp .= "my \$$_=\"$val\";";
1054: }
1055: }
1056: return $temp;
1057: }
1058:
1059: sub writeallows {
1060: unless ($#extlinks>=0) { return; }
1061: my $thisurl='/res/'.&Apache::lonnet::declutter(shift);
1062: if ($ENV{'httpref.'.$thisurl}) {
1063: $thisurl=$ENV{'httpref.'.$thisurl};
1064: }
1065: my $thisdir=$thisurl;
1066: $thisdir=~s/\/[^\/]+$//;
1067: my %httpref=();
1068: foreach (@extlinks) {
1069: $httpref{'httpref.'.
1070: &Apache::lonnet::hreflocation($thisdir,$_)}=$thisurl;
1071: }
1072: @extlinks=();
1073: &Apache::lonnet::appenv(%httpref);
1074: }
1075:
1076: #
1077: # Afterburner handles anchors, highlights and links
1078: #
1079: sub afterburn {
1080: my $result=shift;
1081: &Apache::loncommon::get_unprocessed_cgi($ENV{'QUERY_STRING'},
1082: ['highlight','anchor','link']);
1083: if ($ENV{'form.highlight'}) {
1084: foreach (split(/\,/,$ENV{'form.highlight'})) {
1085: my $anchorname=$_;
1086: my $matchthis=$anchorname;
1087: $matchthis=~s/\_+/\\s\+/g;
1088: $result=~s/($matchthis)/\<font color=\"red\"\>$1\<\/font\>/gs;
1089: }
1090: }
1091: if ($ENV{'form.link'}) {
1092: foreach (split(/\,/,$ENV{'form.link'})) {
1093: my ($anchorname,$linkurl)=split(/\>/,$_);
1094: my $matchthis=$anchorname;
1095: $matchthis=~s/\_+/\\s\+/g;
1096: $result=~s/($matchthis)/\<a href=\"$linkurl\"\>$1\<\/a\>/gs;
1097: }
1098: }
1099: if ($ENV{'form.anchor'}) {
1100: my $anchorname=$ENV{'form.anchor'};
1101: my $matchthis=$anchorname;
1102: $matchthis=~s/\_+/\\s\+/g;
1103: $result=~s/($matchthis)/\<a name=\"$anchorname\"\>$1\<\/a\>/s;
1104: $result.=(<<"ENDSCRIPT");
1105: <script type="text/javascript">
1106: document.location.hash='$anchorname';
1107: </script>
1108: ENDSCRIPT
1109: }
1110: return $result;
1111: }
1112:
1113: sub storefile {
1114: my ($file,$contents)=@_;
1115: if (my $fh=Apache::File->new('>'.$file)) {
1116: print $fh $contents;
1117: $fh->close();
1118: } else {
1119: &warning("Unable to save file $file");
1120: }
1121: }
1122:
1123: sub createnewhtml {
1124: my $filecontents=(<<SIMPLECONTENT);
1125: <html>
1126: <head>
1127: <title>
1128: Title of Document Goes Here
1129: </title>
1130: </head>
1131: <body bgcolor="#FFFFFF">
1132:
1133: Body of Document Goes Here
1134:
1135: </body>
1136: </html>
1137: SIMPLECONTENT
1138: return $filecontents;
1139: }
1140:
1141:
1142: sub inserteditinfo {
1143: my ($result,$filecontents)=@_;
1144: $filecontents = &HTML::Entities::encode($filecontents);
1145: # my $editheader='<a href="#editsection">Edit below</a><hr />';
1146: my $xml_help = Apache::loncommon::helpLatexCheatsheet();
1147: my $titledisplay=&display_title();
1148: my $buttons=(<<BUTTONS);
1149: <input type="submit" name="attemptclean"
1150: value="Save and then attempt to clean HTML" />
1151: <input type="submit" name="savethisfile" value="Save this" />
1152: <input type="submit" name="viewmode" value="View" />
1153: BUTTONS
1154: my $editfooter=(<<ENDFOOTER);
1155: <hr />
1156: <a name="editsection" />
1157: <form method="post">
1158: $xml_help
1159: <input type="hidden" name="editmode" value="Edit" />
1160: $buttons<br />
1161: <textarea cols="80" rows="40" name="filecont">$filecontents</textarea>
1162: <br />$buttons
1163: <br />
1164: </form>
1165: $titledisplay
1166: ENDFOOTER
1167: # $result=~s/(\<body[^\>]*\>)/$1$editheader/is;
1168: $result=~s/(\<\/body\>)/$editfooter/is;
1169: return $result;
1170: }
1171:
1172: sub get_target {
1173: my $viewgrades=&Apache::lonnet::allowed('vgr',$ENV{'request.course.id'});
1174: if ( $ENV{'request.state'} eq 'published') {
1175: if ( defined($ENV{'form.grade_target'})
1176: && ($viewgrades == 'F' )) {
1177: return ($ENV{'form.grade_target'});
1178: } elsif (defined($ENV{'form.grade_target'})) {
1179: if (($ENV{'form.grade_target'} eq 'web') ||
1180: ($ENV{'form.grade_target'} eq 'tex') ) {
1181: return $ENV{'form.grade_target'}
1182: } else {
1183: return 'web';
1184: }
1185: } else {
1186: return 'web';
1187: }
1188: } elsif ($ENV{'request.state'} eq 'construct') {
1189: if ( defined($ENV{'form.grade_target'})) {
1190: return ($ENV{'form.grade_target'});
1191: } else {
1192: return 'web';
1193: }
1194: } else {
1195: return 'web';
1196: }
1197: }
1198:
1199: sub handler {
1200: my $request=shift;
1201:
1202: my $target=&get_target();
1203:
1204: $Apache::lonxml::debug=$ENV{'user.debug'};
1205:
1206: if ($ENV{'browser.mathml'}) {
1207: $request->content_type('text/xml');
1208: } else {
1209: $request->content_type('text/html');
1210: }
1211: &Apache::loncommon::no_cache($request);
1212: $request->send_http_header;
1213:
1214: return OK if $request->header_only;
1215:
1216:
1217: my $file=&Apache::lonnet::filelocation("",$request->uri);
1218: #
1219: # Edit action? Save file.
1220: #
1221: unless ($ENV{'request.state'} eq 'published') {
1222: if (($ENV{'form.savethisfile'}) || ($ENV{'form.attemptclean'})) {
1223: &storefile($file,$ENV{'form.filecont'});
1224: }
1225: }
1226: my %mystyle;
1227: my $result = '';
1228: my $filecontents=&Apache::lonnet::getfile($file);
1229: if ($filecontents eq -1) {
1230: $result=(<<ENDNOTFOUND);
1231: <html>
1232: <head>
1233: <title>File not found</title>
1234: </head>
1235: <body bgcolor="#FFFFFF">
1236: <b>File not found: $file</b>
1237: </body>
1238: </html>
1239: ENDNOTFOUND
1240: $filecontents='';
1241: if ($ENV{'request.state'} ne 'published') {
1242: $filecontents=&createnewhtml();
1243: $ENV{'form.editmode'}='Edit'; #force edit mode
1244: }
1245: } else {
1246: unless ($ENV{'request.state'} eq 'published') {
1247: if ($ENV{'form.attemptclean'}) {
1248: $filecontents=&htmlclean($filecontents,1);
1249: }
1250: #
1251: # we are in construction space, see if edit mode forced
1252: &Apache::loncommon::get_unprocessed_cgi
1253: ($ENV{'QUERY_STRING'},['editmode']);
1254: }
1255: if (!$ENV{'form.editmode'} || $ENV{'form.viewmode'}) {
1256: $result = &Apache::lonxml::xmlparse($request,$target,$filecontents,
1257: '',%mystyle);
1258: }
1259: }
1260:
1261: #
1262: # Edit action? Insert editing commands
1263: #
1264: unless ($ENV{'request.state'} eq 'published') {
1265: if ($ENV{'form.editmode'} && (!($ENV{'form.viewmode'}))) {
1266: my $displayfile=$request->uri;
1267: $displayfile=~s/^\/[^\/]*//;
1268: $result='<html><body bgcolor="#FFFFFF"><h3>'.$displayfile.
1269: '</h3></body></html>';
1270: $result=&inserteditinfo($result,$filecontents);
1271: }
1272: }
1273:
1274: writeallows($request->uri);
1275:
1276:
1277: $request->print($result);
1278:
1279: return OK;
1280: }
1281:
1282: sub display_title {
1283: my $result;
1284: if ($ENV{'request.state'} eq 'construct') {
1285: my $title=&Apache::lonnet::gettitle();
1286: if (!defined($title) || $title eq '') {
1287: $title = $ENV{'request.filename'};
1288: $title = substr($title, rindex($title, '/') + 1);
1289: }
1290: $result = "<script type='text/javascript'>top.document.title = '$title - LON-CAPA Construction Space';</script>";
1291: }
1292: return $result;
1293: }
1294:
1295: sub debug {
1296: if ($Apache::lonxml::debug eq 1) {
1297: $|=1;
1298: print('<font size="-2"<pre>DEBUG:'.&HTML::Entities::encode($_[0])."</pre></font>\n");
1299: }
1300: }
1301:
1302: sub error {
1303: $errorcount++;
1304: if (($Apache::lonxml::debug eq 1) || ($ENV{'request.state'} eq 'construct') ) {
1305: # If printing in construction space, put the error inside <pre></pre>
1306: print "<b>ERROR:</b>".join("\n",@_)."\n";
1307: } else {
1308: print "<b>An Error occured while processing this resource. The instructor has been notified.</b> <br />";
1309: #notify author
1310: &Apache::lonmsg::author_res_msg($ENV{'request.filename'},join('<br />',@_));
1311: #notify course
1312: if ( $ENV{'request.course.id'} ) {
1313: my (undef,%users)=&Apache::lonfeedback::decide_receiver(undef,0,1,1,1);
1314: my $declutter=&Apache::lonnet::declutter($ENV{'request.filename'});
1315: foreach (keys %users) {
1316: my ($user,$domain) = split(/:/, $_);
1317: &Apache::lonmsg::user_normal_msg($user,$domain,
1318: "Error [$declutter]",join('<br />',@_));
1319: }
1320: }
1321:
1322: #FIXME probably shouldn't have me get everything forever.
1323: &Apache::lonmsg::user_normal_msg('albertel','msu',"Error in $ENV{'request.filename'}",join('<br />',@_));
1324: #&Apache::lonmsg::user_normal_msg('albertel','103',"Error in $ENV{'request.filename'}",$_[0]);
1325: }
1326: }
1327:
1328: sub warning {
1329: $warningcount++;
1330:
1331: if ($ENV{'form.grade_target'} ne 'tex') {
1332: if ($ENV{'request.state'} eq 'construct' || $Apache::lonxml::debug) {
1333: print "<b>W</b>ARNING<b>:</b>".join('<br />',@_)."<br />\n";
1334: }
1335: }
1336: }
1337:
1338: sub get_param {
1339: my ($param,$parstack,$safeeval,$context,$case_insensitive) = @_;
1340: if ( ! $context ) { $context = -1; }
1341: my $args ='';
1342: if ( $#$parstack > (-2-$context) ) { $args=$$parstack[$context]; }
1343: if ( ! $args ) { return undef; }
1344: if ( $case_insensitive ) {
1345: if ($args =~ s/(my \$)(\Q$param\E)(=\")/$1.lc($2).$3/ei) {
1346: return &Apache::run::run("{$args;".'return $'.$param.'}',
1347: $safeeval); #'
1348: } else {
1349: return undef;
1350: }
1351: } else {
1352: if ( $args =~ /my \$\Q$param\E=\"/ ) {
1353: return &Apache::run::run("{$args;".'return $'.$param.'}',
1354: $safeeval); #'
1355: } else {
1356: return undef;
1357: }
1358: }
1359: }
1360:
1361: sub get_param_var {
1362: my ($param,$parstack,$safeeval,$context,$case_insensitive) = @_;
1363: if ( ! $context ) { $context = -1; }
1364: my $args ='';
1365: if ( $#$parstack > (-2-$context) ) { $args=$$parstack[$context]; }
1366: &Apache::lonxml::debug("Args are $args param is $param");
1367: if ($case_insensitive) {
1368: if (! ($args=~s/(my \$)(\Q$param\E)(=\")/$1.lc($2).$3/ei)) {
1369: return undef;
1370: }
1371: } elsif ( $args !~ /my \$\Q$param\E=\"/ ) { return undef; }
1372: my $value=&Apache::run::run("{$args;".'return $'.$param.'}',$safeeval); #'
1373: &Apache::lonxml::debug("first run is $value");
1374: if ($value =~ /^[\$\@\%]\w+$/) {
1375: &Apache::lonxml::debug("doing second");
1376: my @result=&Apache::run::run("return $value",$safeeval,1);
1377: if (!defined($result[0])) {
1378: return $value
1379: } else {
1380: if (wantarray) { return @result; } else { return $result[0]; }
1381: }
1382: } else {
1383: return $value;
1384: }
1385: }
1386:
1387: sub register_insert {
1388: my @data = split /\n/, &Apache::lonnet::getfile('/home/httpd/lonTabs/insertlist.tab');
1389: my $i;
1390: my $tagnum=0;
1391: my @order;
1392: for ($i=0;$i < $#data; $i++) {
1393: my $line = $data[$i];
1394: if ( $line =~ /^\#/ || $line =~ /^\s*\n/) { next; }
1395: if ( $line =~ /TABLE/ ) { last; }
1396: my ($tag,$descrip,$color,$function,$show,$helpfile,$helpdesc) = split(/,/, $line);
1397: if ($tag) {
1398: $insertlist{"$tagnum.tag"} = $tag;
1399: $insertlist{"$tagnum.description"} = $descrip;
1400: $insertlist{"$tagnum.color"} = $color;
1401: $insertlist{"$tagnum.function"} = $function;
1402: if (!defined($show)) { $show='yes'; }
1403: $insertlist{"$tagnum.show"}= $show;
1404: $insertlist{"$tagnum.helpfile"} = $helpfile;
1405: $insertlist{"$tagnum.helpdesc"} = $helpdesc;
1406: $insertlist{"$tag.num"}=$tagnum;
1407: $tagnum++;
1408: }
1409: }
1410: $i++; #skipping TABLE line
1411: $tagnum = 0;
1412: for (;$i < $#data;$i++) {
1413: my $line = $data[$i];
1414: my ($mnemonic,@which) = split(/ +/,$line);
1415: my $tag = $insertlist{"$tagnum.tag"};
1416: for (my $j=0;$j <=$#which;$j++) {
1417: if ( $which[$j] eq 'Y' ) {
1418: if ($insertlist{"$j.show"} ne 'no') {
1419: push(@{ $insertlist{"$tag.which"} },$j);
1420: }
1421: }
1422: }
1423: $tagnum++;
1424: }
1425: }
1426:
1427: sub description {
1428: my ($token)=@_;
1429: my $tagnum;
1430: my $tag=$token->[1];
1431: foreach my $namespace (reverse @Apache::lonxml::namespace) {
1432: my $testtag=$namespace.'::'.$tag;
1433: $tagnum=$insertlist{"$testtag.num"};
1434: if (defined($tagnum)) { last; }
1435: }
1436: if (!defined ($tagnum)) { $tagnum=$Apache::lonxml::insertlist{"$tag.num"}; }
1437: return $insertlist{$tagnum.'.description'};
1438: }
1439:
1440: # Returns a list containing the help file, and the description
1441: sub helpinfo {
1442: my ($token)=@_;
1443: my $tagnum;
1444: my $tag=$token->[1];
1445: foreach my $namespace (reverse @Apache::lonxml::namespace) {
1446: my $testtag=$namespace.'::'.$tag;
1447: $tagnum=$insertlist{"$testtag.num"};
1448: if (defined($tagnum)) { last; }
1449: }
1450: if (!defined ($tagnum)) { $tagnum=$Apache::lonxml::insertlist{"$tag.num"}; }
1451: return ($insertlist{$tagnum.'.helpfile'}, $insertlist{$tagnum.'.helpdesc'});
1452: }
1453:
1454: # ----------------------------------------------------------------- whichuser
1455: # returns a list of $symb, $courseid, $domain, $name that is correct for
1456: # calls to lonnet functions for this setup.
1457: # - looks for form.grade_ parameters
1458: sub whichuser {
1459: my ($passedsymb)=@_;
1460: my ($symb,$courseid,$domain,$name,$publicuser);
1461: if (defined($ENV{'form.grade_symb'})) {
1462: my $tmp_courseid=$ENV{'form.grade_courseid'};
1463: my $allowed=&Apache::lonnet::allowed('vgr',$tmp_courseid);
1464: if ($allowed) {
1465: $symb=$ENV{'form.grade_symb'};
1466: $courseid=$ENV{'form.grade_courseid'};
1467: $domain=$ENV{'form.grade_domain'};
1468: $name=$ENV{'form.grade_username'};
1469: }
1470: } else {
1471: if (!$passedsymb) {
1472: $symb=&Apache::lonnet::symbread();
1473: } else {
1474: $symb=$passedsymb;
1475: }
1476: $courseid=$ENV{'request.course.id'};
1477: $domain=$ENV{'user.domain'};
1478: $name=$ENV{'user.name'};
1479: if ($name eq 'public' && $domain eq 'public') {
1480: if (!defined($ENV{'form.username'})) {
1481: $ENV{'form.username'}.=time.rand(10000000);
1482: }
1483: $name.=$ENV{'form.username'};
1484: }
1485: }
1486: return ($symb,$courseid,$domain,$name,$publicuser);
1487: }
1488:
1489: 1;
1490: __END__
1491:
1492:
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