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[LON-CAPA] /
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xml /
lonxml.pm
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Sun Sep 14 23:57:18 2003 UTC (20 years, 9 months ago) by
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In preparation for implementing threaded discussion and disentangling COM
from FDBK, disentagle the subroutines - there is really no reason for the
discussion display to be embedded into lonxml.
1: # The LearningOnline Network with CAPA
2: # XML Parser Module
3: #
4: # $Id: lonxml.pm,v 1.276 2003/09/14 23:57:18 www Exp $
5: #
6: # Copyright Michigan State University Board of Trustees
7: #
8: # This file is part of the LearningOnline Network with CAPA (LON-CAPA).
9: #
10: # LON-CAPA is free software; you can redistribute it and/or modify
11: # it under the terms of the GNU General Public License as published by
12: # the Free Software Foundation; either version 2 of the License, or
13: # (at your option) any later version.
14: #
15: # LON-CAPA is distributed in the hope that it will be useful,
16: # but WITHOUT ANY WARRANTY; without even the implied warranty of
17: # MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
18: # GNU General Public License for more details.
19: #
20: # You should have received a copy of the GNU General Public License
21: # along with LON-CAPA; if not, write to the Free Software
22: # Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA 02111-1307 USA
23: #
24: # /home/httpd/html/adm/gpl.txt
25: #
26: # http://www.lon-capa.org/
27: #
28: # Copyright for TtHfunc and TtMfunc by Ian Hutchinson.
29: # TtHfunc and TtMfunc (the "Code") may be compiled and linked into
30: # binary executable programs or libraries distributed by the
31: # Michigan State University (the "Licensee"), but any binaries so
32: # distributed are hereby licensed only for use in the context
33: # of a program or computational system for which the Licensee is the
34: # primary author or distributor, and which performs substantial
35: # additional tasks beyond the translation of (La)TeX into HTML.
36: # The C source of the Code may not be distributed by the Licensee
37: # to any other parties under any circumstances.
38: #
39: # last modified 06/26/00 by Alexander Sakharuk
40: # 11/6 Gerd Kortemeyer
41: # 6/1/1 Gerd Kortemeyer
42: # 2/21,3/13 Guy
43: # 3/29,5/4 Gerd Kortemeyer
44: # 5/26 Gerd Kortemeyer
45: # 5/27 H. K. Ng
46: # 6/2,6/3,6/8,6/9 Gerd Kortemeyer
47: # 6/12,6/13 H. K. Ng
48: # 6/16 Gerd Kortemeyer
49: # 7/27 H. K. Ng
50: # 8/7,8/9,8/10,8/11,8/15,8/16,8/17,8/18,8/20,8/23,8/24 Gerd Kortemeyer
51: # Guy Albertelli
52: # 9/26 Gerd Kortemeyer
53: # Dec Guy Albertelli
54: # YEAR=2002
55: # 1/1 Gerd Kortemeyer
56: # 1/2 Matthew Hall
57: # 1/3 Gerd Kortemeyer
58: #
59:
60: package Apache::lonxml;
61: use vars
62: qw(@pwd @outputstack $redirection $import @extlinks $metamode $evaluate %insertlist @namespace $prevent_entity_encode $errorcount $warningcount);
63: use strict;
64: use HTML::LCParser();
65: use HTML::TreeBuilder();
66: use HTML::Entities();
67: use Safe();
68: use Safe::Hole();
69: use Math::Cephes();
70: use Math::Random();
71: use Opcode();
72: use POSIX qw(strftime);
73:
74:
75: sub register {
76: my ($space,@taglist) = @_;
77: foreach my $temptag (@taglist) {
78: push(@{ $Apache::lonxml::alltags{$temptag} },$space);
79: }
80: }
81:
82: sub deregister {
83: my ($space,@taglist) = @_;
84: foreach my $temptag (@taglist) {
85: my $tempspace = $Apache::lonxml::alltags{$temptag}[-1];
86: if ($tempspace eq $space) {
87: pop(@{ $Apache::lonxml::alltags{$temptag} });
88: }
89: }
90: #&printalltags();
91: }
92:
93: use Apache::Constants qw(:common);
94: use Apache::lontexconvert();
95: use Apache::style();
96: use Apache::run();
97: use Apache::londefdef();
98: use Apache::scripttag();
99: use Apache::edit();
100: use Apache::inputtags();
101: use Apache::outputtags();
102: use Apache::lonnet();
103: use Apache::File();
104: use Apache::loncommon();
105: use Apache::lonfeedback();
106: use Apache::lonmsg();
107: use Apache::loncacc();
108:
109: #================================================== Main subroutine: xmlparse
110: #debugging control, to turn on debugging modify the correct handler
111: $Apache::lonxml::debug=0;
112:
113: # keeps count of the number of warnings and errors generated in a parse
114: $warningcount=0;
115: $errorcount=0;
116:
117: #path to the directory containing the file currently being processed
118: @pwd=();
119:
120: #these two are used for capturing a subset of the output for later processing,
121: #don't touch them directly use &startredirection and &endredirection
122: @outputstack = ();
123: $redirection = 0;
124:
125: #controls wheter the <import> tag actually does
126: $import = 1;
127: @extlinks=();
128:
129: # meta mode is a bit weird only some output is to be turned off
130: #<output> tag turns metamode off (defined in londefdef.pm)
131: $metamode = 0;
132:
133: # turns on and of run::evaluate actually derefencing var refs
134: $evaluate = 1;
135:
136: # data structure for eidt mode, determines what tags can go into what other tags
137: %insertlist=();
138:
139: # stores the list of active tag namespaces
140: @namespace=();
141:
142: # if 0 all high ASCII characters will be encoded into HTML Entities
143: $prevent_entity_encode=0;
144:
145: # has the dynamic menu been updated to know about this resource
146: $Apache::lonxml::registered=0;
147:
148: # a pointer the the Apache request object
149: $Apache::lonxml::request='';
150:
151: # a problem number counter, and check on ether it is used
152: $Apache::lonxml::counter=1;
153: $Apache::lonxml::counter_changed=0;
154:
155: #internal check on whether to look at style defs
156: $Apache::lonxml::usestyle=1;
157:
158: #locations used to store the parameter string for style substitutions
159: $Apache::lonxml::style_values='';
160: $Apache::lonxml::style_end_values='';
161:
162: sub xmlbegin {
163: my $output='';
164: if ($ENV{'browser.mathml'}) {
165: $output='<?xml version="1.0"?>'
166: .'<?xml-stylesheet type="text/css" href="/adm/MathML/mathml.css"?>'
167: .'<!DOCTYPE html SYSTEM "/adm/MathML/mathml.dtd" '
168: .'[<!ENTITY mathns "http://www.w3.org/1998/Math/MathML">]>'
169: .'<html xmlns:math="http://www.w3.org/1998/Math/MathML" '
170: .'xmlns="http://www.w3.org/TR/REC-html40">';
171: } else {
172: $output='<html>';
173: }
174: return $output;
175: }
176:
177: sub xmlend {
178: my ($discussiononly,$symb)=@_;
179: my $discussion='';
180: if ($ENV{'request.course.id'}) {
181: my $crs='/'.$ENV{'request.course.id'};
182: if ($ENV{'request.course.sec'}) {
183: $crs.='_'.$ENV{'request.course.sec'};
184: }
185: $crs=~s/\_/\//g;
186: $discussion=&Apache::lonfeedback::list_discussion
187: ($crs,$symb,$discussiononly);
188: }
189: return $discussion.($discussiononly?'':'</html>');
190: }
191:
192: sub tokeninputfield {
193: my $defhost=$Apache::lonnet::perlvar{'lonHostID'};
194: $defhost=~tr/a-z/A-Z/;
195: return (<<ENDINPUTFIELD)
196: <script type="text/javascript">
197: function updatetoken() {
198: var comp=new Array;
199: var barcode=unescape(document.tokeninput.barcode.value);
200: comp=barcode.split('*');
201: if (typeof(comp[0])!="undefined") {
202: document.tokeninput.codeone.value=comp[0];
203: }
204: if (typeof(comp[1])!="undefined") {
205: document.tokeninput.codetwo.value=comp[1];
206: }
207: if (typeof(comp[2])!="undefined") {
208: comp[2]=comp[2].toUpperCase();
209: document.tokeninput.codethree.value=comp[2];
210: }
211: document.tokeninput.barcode.value='';
212: }
213: </script>
214: <form method="post" name="tokeninput">
215: <table border="2" bgcolor="#FFFFBB">
216: <tr><th>DocID Checkin</th></tr>
217: <tr><td>
218: <table>
219: <tr>
220: <td>Scan in Barcode</td>
221: <td><input type="text" size="22" name="barcode"
222: onChange="updatetoken()"/></td>
223: </tr>
224: <tr><td><i>or</i> Type in DocID</td>
225: <td>
226: <input type="text" size="5" name="codeone" />
227: <b><font size="+2">*</font></b>
228: <input type="text" size="5" name="codetwo" />
229: <b><font size="+2">*</font></b>
230: <input type="text" size="10" name="codethree" value="$defhost"
231: onChange="this.value=this.value.toUpperCase()" />
232: </td></tr>
233: </table>
234: </td></tr>
235: <tr><td><input type="submit" value="Check in DocID" /></td></tr>
236: </table>
237: </form>
238: ENDINPUTFIELD
239: }
240:
241: sub maketoken {
242: my ($symb,$tuname,$tudom,$tcrsid)=@_;
243: unless ($symb) {
244: $symb=&Apache::lonnet::symbread();
245: }
246: unless ($tuname) {
247: $tuname=$ENV{'user.name'};
248: $tudom=$ENV{'user.domain'};
249: $tcrsid=$ENV{'request.course.id'};
250: }
251:
252: return &Apache::lonnet::checkout($symb,$tuname,$tudom,$tcrsid);
253: }
254:
255: sub printtokenheader {
256: my ($target,$token,$tsymb,$tcrsid,$tudom,$tuname)=@_;
257: unless ($token) { return ''; }
258:
259: my ($symb,$courseid,$domain,$name) = &Apache::lonxml::whichuser();
260: unless ($tsymb) {
261: $tsymb=$symb;
262: }
263: unless ($tuname) {
264: $tuname=$name;
265: $tudom=$domain;
266: $tcrsid=$courseid;
267: }
268:
269: my %reply=&Apache::lonnet::get('environment',
270: ['firstname','middlename','lastname','generation'],
271: $tudom,$tuname);
272: my $plainname=$reply{'firstname'}.' '.
273: $reply{'middlename'}.' '.
274: $reply{'lastname'}.' '.
275: $reply{'generation'};
276:
277: if ($target eq 'web') {
278: my %idhash=&Apache::lonnet::idrget($tudom,($tuname));
279: return
280: '<img align="right" src="/cgi-bin/barcode.png?encode='.$token.'" />'.
281: 'Checked out for '.$plainname.
282: '<br />User: '.$tuname.' at '.$tudom.
283: '<br />ID: '.$idhash{$tuname}.
284: '<br />CourseID: '.$tcrsid.
285: '<br />Course: '.$ENV{'course.'.$tcrsid.'.description'}.
286: '<br />DocID: '.$token.
287: '<br />Time: '.localtime().'<hr />';
288: } else {
289: return $token;
290: }
291: }
292:
293: sub fontsettings() {
294: my $headerstring='';
295: if (($ENV{'browser.os'} eq 'mac') && (!$ENV{'browser.mathml'})) {
296: $headerstring.=
297: '<meta Content-Type="text/html; charset=x-mac-roman">';
298: } elsif (!$ENV{'browser.mathml'} && $ENV{'browser.unicode'}) {
299: $headerstring.=
300: '<meta http-equiv="Content-Type" content="text/html; charset=utf-8" />';
301: }
302: return $headerstring;
303: }
304:
305: sub printalltags {
306: my $temp;
307: foreach $temp (sort keys %Apache::lonxml::alltags) {
308: &Apache::lonxml::debug("$temp -- ".
309: join(',',@{ $Apache::lonxml::alltags{$temp} }));
310: }
311: }
312:
313: sub xmlparse {
314: my ($request,$target,$content_file_string,$safeinit,%style_for_target) = @_;
315:
316: &setup_globals($request,$target);
317: &Apache::inputtags::initialize_inputtags();
318: &Apache::outputtags::initialize_outputtags();
319: &Apache::edit::initialize_edit();
320:
321: #
322: # do we have a course style file?
323: #
324:
325: if ($ENV{'request.course.id'} && $ENV{'request.state'} ne 'construct') {
326: my $bodytext=
327: $ENV{'course.'.$ENV{'request.course.id'}.'.default_xml_style'};
328: if ($bodytext) {
329: my $location=&Apache::lonnet::filelocation('',$bodytext);
330: my $styletext=&Apache::lonnet::getfile($location);
331: if ($styletext ne '-1') {
332: %style_for_target = (%style_for_target,
333: &Apache::style::styleparser($target,$styletext));
334: }
335: }
336: }
337: #&printalltags();
338: my @pars = ();
339: my $pwd=$ENV{'request.filename'};
340: $pwd =~ s:/[^/]*$::;
341: &newparser(\@pars,\$content_file_string,$pwd);
342:
343: my $safeeval = new Safe;
344: my $safehole = new Safe::Hole;
345: &init_safespace($target,$safeeval,$safehole,$safeinit);
346: #-------------------- Redefinition of the target in the case of compound target
347:
348: ($target, my @tenta) = split('&&',$target);
349:
350: my @stack = ();
351: my @parstack = ();
352: &initdepth;
353:
354: my $finaloutput = &inner_xmlparse($target,\@stack,\@parstack,\@pars,
355: $safeeval,\%style_for_target);
356:
357: if ($ENV{'request.uri'}) {
358: &writeallows($ENV{'request.uri'});
359: }
360: if ($Apache::lonxml::counter_changed) { &store_counter() }
361: return $finaloutput;
362: }
363:
364: sub htmlclean {
365: my ($raw,$full)=@_;
366:
367: my $tree = HTML::TreeBuilder->new;
368: $tree->ignore_unknown(0);
369:
370: $tree->parse($raw);
371:
372: my $output= $tree->as_HTML(undef,' ');
373:
374: $output=~s/\<(br|hr|img|meta|allow)(.*?)\>/\<$1$2 \/\>/gis;
375: $output=~s/\<\/(br|hr|img|meta|allow)\>//gis;
376: unless ($full) {
377: $output=~s/\<[\/]*(body|head|html)\>//gis;
378: }
379:
380: $tree = $tree->delete;
381:
382: return $output;
383: }
384:
385: sub latex_special_symbols {
386: my ($string,$where)=@_;
387: if ($where eq 'header') {
388: $string =~ s/(\\|_|\^)/ /g;
389: $string =~ s/(\$|%|\#|&|\{|\})/\\$1/g;
390: $string =~ s/_/ /g;
391: } else {
392: $string=~s/\\ /\\char92 /g;
393: $string=~s/\^/\\char94 /g;
394: $string=~s/\~/\\char126 /g;
395: $string=~s/(&[^A-Za-z\#])/\\$1/g;
396: $string=~s/([^&])\#/$1\\#/g;
397: $string=~s/(\$|_|{|})/\\$1/g;
398: $string=~s/\\char92 /\\texttt{\\char92}/g;
399: $string=~s/(>|<)/\$$1\$/g; #more or less
400: if ($string=~m/\d%/) {$string =~ s/(\d)%/$1\\%/g;} #percent after digit
401: if ($string=~m/\s%/) {$string =~ s/(\s)%/$1\\%/g;} #percent after space
402: if ($string eq '%.') {$string = '\%.';} #percent at the end of statement
403: }
404: return $string;
405: }
406:
407: sub inner_xmlparse {
408: my ($target,$stack,$parstack,$pars,$safeeval,$style_for_target)=@_;
409: my $finaloutput = '';
410: my $result;
411: my $token;
412: my $dontpop=0;
413: while ( $#$pars > -1 ) {
414: while ($token = $$pars['-1']->get_token) {
415: if (($token->[0] eq 'T') || ($token->[0] eq 'C') ) {
416: if ($metamode<1) {
417: my $text=$token->[1];
418: if ($token->[0] eq 'C' && $target eq 'tex') {
419: $text = '';
420: # $text = '%'.$text."\n";
421: }
422: $result.=$text;
423: }
424: } elsif (($token->[0] eq 'D')) {
425: if ($metamode<1 && $target eq 'web') {
426: my $text=$token->[1];
427: $result.=$text;
428: }
429: } elsif ($token->[0] eq 'PI') {
430: if ($metamode<1 && $target eq 'web') {
431: $result=$token->[2];
432: }
433: } elsif ($token->[0] eq 'S') {
434: # add tag to stack
435: push (@$stack,$token->[1]);
436: # add parameters list to another stack
437: push (@$parstack,&parstring($token));
438: &increasedepth($token);
439: if ($Apache::lonxml::usestyle &&
440: exists($$style_for_target{$token->[1]})) {
441: $Apache::lonxml::usestyle=0;
442: my $string=$$style_for_target{$token->[1]}.
443: '<LONCAPA_INTERNAL_TURN_STYLE_ON />';
444: &Apache::lonxml::newparser($pars,\$string);
445: $Apache::lonxml::style_values=$$parstack[-1];
446: $Apache::lonxml::style_end_values=$$parstack[-1];
447: } else {
448: $result = &callsub("start_$token->[1]", $target, $token, $stack,
449: $parstack, $pars, $safeeval, $style_for_target);
450: }
451: } elsif ($token->[0] eq 'E') {
452: if ($Apache::lonxml::usestyle &&
453: exists($$style_for_target{'/'."$token->[1]"})) {
454: $Apache::lonxml::usestyle=0;
455: my $string=$$style_for_target{'/'.$token->[1]}.
456: '<LONCAPA_INTERNAL_TURN_STYLE_ON end="'.$token->[1].'" />';
457: &Apache::lonxml::newparser($pars,\$string);
458: $Apache::lonxml::style_values=$Apache::lonxml::style_end_values;
459: $Apache::lonxml::style_end_values='';
460: $dontpop=1;
461: } else {
462: #clear out any tags that didn't end
463: while ($token->[1] ne $$stack['-1'] && ($#$stack > -1)) {
464: my $lasttag=$$stack[-1];
465: if ($token->[1] =~ /^$lasttag$/i) {
466: &Apache::lonxml::warning('Using tag </'.$token->[1].'> on line '.$token->[3].' as end tag to <'.$$stack[-1].'>');
467: last;
468: } else {
469: &Apache::lonxml::warning('Found tag </'.$token->[1].'> on line '.$token->[3].' when looking for </'.$$stack[-1].'> in file');
470: &end_tag($stack,$parstack,$token);
471: }
472: }
473: $result = &callsub("end_$token->[1]", $target, $token, $stack,
474: $parstack, $pars,$safeeval, $style_for_target);
475: }
476: } else {
477: &Apache::lonxml::error("Unknown token event :$token->[0]:$token->[1]:");
478: }
479: #evaluate variable refs in result
480: if ($result ne "") {
481: my $extras;
482: if (!$Apache::lonxml::usestyle) {
483: $extras=$Apache::lonxml::style_values;
484: }
485: if ( $#$parstack > -1 ) {
486: $result=&Apache::run::evaluate($result,$safeeval,$extras.$$parstack[-1]);
487: } else {
488: $result= &Apache::run::evaluate($result,$safeeval,$extras);
489: }
490: }
491: if (($token->[0] eq 'T') || ($token->[0] eq 'C') || ($token->[0] eq 'D') ) {
492: #Style file definitions should be correct
493: if ($target eq 'tex' && ($Apache::lonxml::usestyle)) {
494: $result=&latex_special_symbols($result);
495: }
496: }
497:
498: # Encode any high ASCII characters
499: if (!$Apache::lonxml::prevent_entity_encode) {
500: $result=&HTML::Entities::encode($result,"\200-\377");
501: }
502: if ($Apache::lonxml::redirection) {
503: $Apache::lonxml::outputstack['-1'] .= $result;
504: } else {
505: $finaloutput.=$result;
506: }
507: $result = '';
508:
509: if ($token->[0] eq 'E' && !$dontpop) {
510: &end_tag($stack,$parstack,$token);
511: }
512: $dontpop=0;
513: }
514: if ($#$pars > -1) {
515: pop @$pars;
516: pop @Apache::lonxml::pwd;
517: }
518: }
519:
520: # if ($target eq 'meta') {
521: # $finaloutput.=&endredirection;
522: # }
523:
524:
525: if (($ENV{'QUERY_STRING'}) && ($target eq 'web')) {
526: $finaloutput=&afterburn($finaloutput);
527: }
528: return $finaloutput;
529: }
530:
531: sub callsub {
532: my ($sub,$target,$token,$tagstack,$parstack,$parser,$safeeval,$style)=@_;
533: my $currentstring='';
534: my $nodefault;
535: {
536: my $sub1;
537: no strict 'refs';
538: my $tag=$token->[1];
539: # get utterly rid of extended html tags
540: if ($tag=~/^x\-/i) { return ''; }
541: my $space=$Apache::lonxml::alltags{$tag}[-1];
542: if (!$space) {
543: $tag=~tr/A-Z/a-z/;
544: $sub=~tr/A-Z/a-z/;
545: $space=$Apache::lonxml::alltags{$tag}[-1]
546: }
547:
548: my $deleted=0;
549: $Apache::lonxml::curdepth=join('_',@Apache::lonxml::depthcounter);
550: if (($token->[0] eq 'S') && ($target eq 'modified')) {
551: $deleted=&Apache::edit::handle_delete($space,$target,$token,$tagstack,
552: $parstack,$parser,$safeeval,
553: $style);
554: }
555: if (!$deleted) {
556: if ($space) {
557: #&Apache::lonxml::debug("Calling sub $sub in $space $metamode");
558: $sub1="$space\:\:$sub";
559: ($currentstring,$nodefault) = &$sub1($target,$token,$tagstack,
560: $parstack,$parser,$safeeval,
561: $style);
562: } else {
563: #&Apache::lonxml::debug("NOT Calling sub $sub in $space $metamode");
564: if ($metamode <1) {
565: if (defined($token->[4]) && ($metamode < 1)) {
566: $currentstring = $token->[4];
567: } else {
568: $currentstring = $token->[2];
569: }
570: }
571: }
572: # &Apache::lonxml::debug("nodefalt:$nodefault:");
573: if ($currentstring eq '' && $nodefault eq '') {
574: if ($target eq 'edit') {
575: #&Apache::lonxml::debug("doing default edit for $token->[1]");
576: if ($token->[0] eq 'S') {
577: $currentstring = &Apache::edit::tag_start($target,$token);
578: } elsif ($token->[0] eq 'E') {
579: $currentstring = &Apache::edit::tag_end($target,$token);
580: }
581: } elsif ($target eq 'modified') {
582: if ($token->[0] eq 'S') {
583: $currentstring = $token->[4];
584: $currentstring.=&Apache::edit::handle_insert();
585: } elsif ($token->[0] eq 'E') {
586: $currentstring = $token->[2];
587: $currentstring.=&Apache::edit::handle_insertafter($token->[1]);
588: } else {
589: $currentstring = $token->[2];
590: }
591: }
592: }
593: }
594: use strict 'refs';
595: }
596: return $currentstring;
597: }
598:
599: sub setup_globals {
600: my ($request,$target)=@_;
601: $Apache::lonxml::request=$request;
602: $Apache::lonxml::registered = 0;
603: $errorcount=0;
604: $warningcount=0;
605: $Apache::lonxml::default_homework_loaded=0;
606: $Apache::lonxml::usestyle=1;
607: &init_counter();
608: @Apache::lonxml::pwd=();
609: @Apache::lonxml::extlinks=();
610: if ($target eq 'meta') {
611: $Apache::lonxml::redirection = 0;
612: $Apache::lonxml::metamode = 1;
613: $Apache::lonxml::evaluate = 1;
614: $Apache::lonxml::import = 0;
615: } elsif ($target eq 'answer') {
616: $Apache::lonxml::redirection = 0;
617: $Apache::lonxml::metamode = 1;
618: $Apache::lonxml::evaluate = 1;
619: $Apache::lonxml::import = 1;
620: } elsif ($target eq 'grade') {
621: &startredirection;
622: $Apache::lonxml::metamode = 0;
623: $Apache::lonxml::evaluate = 1;
624: $Apache::lonxml::import = 1;
625: } elsif ($target eq 'modified') {
626: $Apache::lonxml::redirection = 0;
627: $Apache::lonxml::metamode = 0;
628: $Apache::lonxml::evaluate = 0;
629: $Apache::lonxml::import = 0;
630: } elsif ($target eq 'edit') {
631: $Apache::lonxml::redirection = 0;
632: $Apache::lonxml::metamode = 0;
633: $Apache::lonxml::evaluate = 0;
634: $Apache::lonxml::import = 0;
635: } elsif ($target eq 'analyze') {
636: $Apache::lonxml::redirection = 0;
637: $Apache::lonxml::metamode = 0;
638: $Apache::lonxml::evaluate = 1;
639: $Apache::lonxml::import = 1;
640: } else {
641: $Apache::lonxml::redirection = 0;
642: $Apache::lonxml::metamode = 0;
643: $Apache::lonxml::evaluate = 1;
644: $Apache::lonxml::import = 1;
645: }
646: }
647:
648: sub init_safespace {
649: my ($target,$safeeval,$safehole,$safeinit) = @_;
650: $safeeval->permit("entereval");
651: $safeeval->permit(":base_math");
652: $safeeval->permit("sort");
653: $safeeval->deny(":base_io");
654: $safehole->wrap(\&Apache::scripttag::xmlparse,$safeeval,'&xmlparse');
655: $safehole->wrap(\&Apache::outputtags::multipart,$safeeval,'&multipart');
656: $safehole->wrap(\&Apache::lonnet::EXT,$safeeval,'&EXT');
657:
658: $safehole->wrap(\&Math::Cephes::asin,$safeeval,'&asin');
659: $safehole->wrap(\&Math::Cephes::acos,$safeeval,'&acos');
660: $safehole->wrap(\&Math::Cephes::atan,$safeeval,'&atan');
661: $safehole->wrap(\&Math::Cephes::sinh,$safeeval,'&sinh');
662: $safehole->wrap(\&Math::Cephes::cosh,$safeeval,'&cosh');
663: $safehole->wrap(\&Math::Cephes::tanh,$safeeval,'&tanh');
664: $safehole->wrap(\&Math::Cephes::asinh,$safeeval,'&asinh');
665: $safehole->wrap(\&Math::Cephes::acosh,$safeeval,'&acosh');
666: $safehole->wrap(\&Math::Cephes::atanh,$safeeval,'&atanh');
667: $safehole->wrap(\&Math::Cephes::erf,$safeeval,'&erf');
668: $safehole->wrap(\&Math::Cephes::erfc,$safeeval,'&erfc');
669: $safehole->wrap(\&Math::Cephes::j0,$safeeval,'&j0');
670: $safehole->wrap(\&Math::Cephes::j1,$safeeval,'&j1');
671: $safehole->wrap(\&Math::Cephes::jn,$safeeval,'&jn');
672: $safehole->wrap(\&Math::Cephes::jv,$safeeval,'&jv');
673: $safehole->wrap(\&Math::Cephes::y0,$safeeval,'&y0');
674: $safehole->wrap(\&Math::Cephes::y1,$safeeval,'&y1');
675: $safehole->wrap(\&Math::Cephes::yn,$safeeval,'&yn');
676: $safehole->wrap(\&Math::Cephes::yv,$safeeval,'&yv');
677:
678: $safehole->wrap(\&Math::Cephes::bdtr ,$safeeval,'&bdtr' );
679: $safehole->wrap(\&Math::Cephes::bdtrc ,$safeeval,'&bdtrc' );
680: $safehole->wrap(\&Math::Cephes::bdtri ,$safeeval,'&bdtri' );
681: $safehole->wrap(\&Math::Cephes::btdtr ,$safeeval,'&btdtr' );
682: $safehole->wrap(\&Math::Cephes::chdtr ,$safeeval,'&chdtr' );
683: $safehole->wrap(\&Math::Cephes::chdtrc,$safeeval,'&chdtrc');
684: $safehole->wrap(\&Math::Cephes::chdtri,$safeeval,'&chdtri');
685: $safehole->wrap(\&Math::Cephes::fdtr ,$safeeval,'&fdtr' );
686: $safehole->wrap(\&Math::Cephes::fdtrc ,$safeeval,'&fdtrc' );
687: $safehole->wrap(\&Math::Cephes::fdtri ,$safeeval,'&fdtri' );
688: $safehole->wrap(\&Math::Cephes::gdtr ,$safeeval,'&gdtr' );
689: $safehole->wrap(\&Math::Cephes::gdtrc ,$safeeval,'&gdtrc' );
690: $safehole->wrap(\&Math::Cephes::nbdtr ,$safeeval,'&nbdtr' );
691: $safehole->wrap(\&Math::Cephes::nbdtrc,$safeeval,'&nbdtrc');
692: $safehole->wrap(\&Math::Cephes::nbdtri,$safeeval,'&nbdtri');
693: $safehole->wrap(\&Math::Cephes::ndtr ,$safeeval,'&ndtr' );
694: $safehole->wrap(\&Math::Cephes::ndtri ,$safeeval,'&ndtri' );
695: $safehole->wrap(\&Math::Cephes::pdtr ,$safeeval,'&pdtr' );
696: $safehole->wrap(\&Math::Cephes::pdtrc ,$safeeval,'&pdtrc' );
697: $safehole->wrap(\&Math::Cephes::pdtri ,$safeeval,'&pdtri' );
698: $safehole->wrap(\&Math::Cephes::stdtr ,$safeeval,'&stdtr' );
699: $safehole->wrap(\&Math::Cephes::stdtri,$safeeval,'&stdtri');
700:
701: # $safehole->wrap(\&Math::Cephes::new_fract,$safeeval,'&new_fract');
702: # $safehole->wrap(\&Math::Cephes::radd,$safeeval,'&radd');
703: # $safehole->wrap(\&Math::Cephes::rsub,$safeeval,'&rsub');
704: # $safehole->wrap(\&Math::Cephes::rmul,$safeeval,'&rmul');
705: # $safehole->wrap(\&Math::Cephes::rdiv,$safeeval,'&rdiv');
706: # $safehole->wrap(\&Math::Cephes::euclid,$safeeval,'&euclid');
707:
708: $safehole->wrap(\&Math::Random::random_beta,$safeeval,'&math_random_beta');
709: $safehole->wrap(\&Math::Random::random_chi_square,$safeeval,'&math_random_chi_square');
710: $safehole->wrap(\&Math::Random::random_exponential,$safeeval,'&math_random_exponential');
711: $safehole->wrap(\&Math::Random::random_f,$safeeval,'&math_random_f');
712: $safehole->wrap(\&Math::Random::random_gamma,$safeeval,'&math_random_gamma');
713: $safehole->wrap(\&Math::Random::random_multivariate_normal,$safeeval,'&math_random_multivariate_normal');
714: $safehole->wrap(\&Math::Random::random_multinomial,$safeeval,'&math_random_multinomial');
715: $safehole->wrap(\&Math::Random::random_noncentral_chi_square,$safeeval,'&math_random_noncentral_chi_square');
716: $safehole->wrap(\&Math::Random::random_noncentral_f,$safeeval,'&math_random_noncentral_f');
717: $safehole->wrap(\&Math::Random::random_normal,$safeeval,'&math_random_normal');
718: $safehole->wrap(\&Math::Random::random_permutation,$safeeval,'&math_random_permutation');
719: $safehole->wrap(\&Math::Random::random_permuted_index,$safeeval,'&math_random_permuted_index');
720: $safehole->wrap(\&Math::Random::random_uniform,$safeeval,'&math_random_uniform');
721: $safehole->wrap(\&Math::Random::random_poisson,$safeeval,'&math_random_poisson');
722: $safehole->wrap(\&Math::Random::random_uniform_integer,$safeeval,'&math_random_uniform_integer');
723: $safehole->wrap(\&Math::Random::random_negative_binomial,$safeeval,'&math_random_negative_binomial');
724: $safehole->wrap(\&Math::Random::random_binomial,$safeeval,'&math_random_binomial');
725: $safehole->wrap(\&Math::Random::random_seed_from_phrase,$safeeval,'&random_seed_from_phrase');
726: $safehole->wrap(\&Math::Random::random_set_seed_from_phrase,$safeeval,'&random_set_seed_from_phrase');
727: $safehole->wrap(\&Math::Random::random_get_seed,$safeeval,'&random_get_seed');
728: $safehole->wrap(\&Math::Random::random_set_seed,$safeeval,'&random_set_seed');
729:
730: #need to inspect this class of ops
731: # $safeeval->deny(":base_orig");
732: $safeinit .= ';$external::target="'.$target.'";';
733: my $rndseed;
734: my ($symb,$courseid,$domain,$name) = &Apache::lonxml::whichuser();
735: $rndseed=&Apache::lonnet::rndseed($symb,$courseid,$domain,$name);
736: $safeinit .= ';$external::randomseed='.$rndseed.';';
737: &Apache::lonxml::debug("Setting rndseed to $rndseed");
738: &Apache::run::run($safeinit,$safeeval);
739: }
740:
741: sub default_homework_load {
742: my ($safeeval)=@_;
743: &Apache::lonxml::debug('Loading default_homework');
744: my $default=&Apache::lonnet::getfile('/home/httpd/html/res/adm/includes/default_homework.lcpm');
745: if ($default eq -1) {
746: &Apache::lonxml::error("<b>Unable to find <i>default_homework.lcpm</i></b>");
747: } else {
748: &Apache::run::run($default,$safeeval);
749: $Apache::lonxml::default_homework_loaded=1;
750: }
751: }
752:
753: sub startredirection {
754: $Apache::lonxml::redirection++;
755: push (@Apache::lonxml::outputstack, '');
756: }
757:
758: sub endredirection {
759: if (!$Apache::lonxml::redirection) {
760: &Apache::lonxml::error("Endredirection was called, before a startredirection, perhaps you have unbalanced tags. Some debuging information:".join ":",caller);
761: return '';
762: }
763: $Apache::lonxml::redirection--;
764: pop @Apache::lonxml::outputstack;
765: }
766:
767: sub end_tag {
768: my ($tagstack,$parstack,$token)=@_;
769: pop(@$tagstack);
770: pop(@$parstack);
771: &decreasedepth($token);
772: }
773:
774: sub initdepth {
775: @Apache::lonxml::depthcounter=();
776: $Apache::lonxml::depth=-1;
777: $Apache::lonxml::olddepth=-1;
778: }
779:
780: sub increasedepth {
781: my ($token) = @_;
782: $Apache::lonxml::depth++;
783: $Apache::lonxml::depthcounter[$Apache::lonxml::depth]++;
784: if ($Apache::lonxml::depthcounter[$Apache::lonxml::depth]==1) {
785: $Apache::lonxml::olddepth=$Apache::lonxml::depth;
786: }
787: my $curdepth=join('_',@Apache::lonxml::depthcounter);
788: &Apache::lonxml::debug("s $Apache::lonxml::depth : $Apache::lonxml::olddepth : $curdepth : $token->[1]\n");
789: #print "<br />s $Apache::lonxml::depth : $Apache::lonxml::olddepth : $curdepth : $token->[1]\n";
790: }
791:
792: sub decreasedepth {
793: my ($token) = @_;
794: $Apache::lonxml::depth--;
795: if ($Apache::lonxml::depth<$Apache::lonxml::olddepth-1) {
796: $#Apache::lonxml::depthcounter--;
797: $Apache::lonxml::olddepth=$Apache::lonxml::depth+1;
798: }
799: if ( $Apache::lonxml::depth < -1) {
800: &Apache::lonxml::warning("Missing tags, unable to properly run file.");
801: $Apache::lonxml::depth='-1';
802: }
803: my $curdepth=join('_',@Apache::lonxml::depthcounter);
804: &Apache::lonxml::debug("e $Apache::lonxml::depth : $Apache::lonxml::olddepth : $token->[1] : $curdepth\n");
805: #print "<br />e $Apache::lonxml::depth : $Apache::lonxml::olddepth : $token->[1] : $curdepth\n";
806: }
807:
808: sub get_all_text_unbalanced {
809: #there is a copy of this in lonpublisher.pm
810: my($tag,$pars)= @_;
811: my $token;
812: my $result='';
813: $tag='<'.$tag.'>';
814: while ($token = $$pars[-1]->get_token) {
815: if (($token->[0] eq 'T')||($token->[0] eq 'C')||($token->[0] eq 'D')) {
816: $result.=$token->[1];
817: } elsif ($token->[0] eq 'PI') {
818: $result.=$token->[2];
819: } elsif ($token->[0] eq 'S') {
820: $result.=$token->[4];
821: } elsif ($token->[0] eq 'E') {
822: $result.=$token->[2];
823: }
824: if ($result =~ /(.*)\Q$tag\E(.*)/s) {
825: &Apache::lonxml::debug('Got a winner with leftovers ::'.$2);
826: &Apache::lonxml::debug('Result is :'.$1);
827: $result=$1;
828: my $redo=$tag.$2;
829: &Apache::lonxml::newparser($pars,\$redo);
830: last;
831: }
832: }
833: return $result
834: }
835:
836: sub increment_counter {
837: my ($increment) = @_;
838: if (defined($increment) && $increment gt 0) {
839: $Apache::lonxml::counter+=$increment;
840: } else {
841: $Apache::lonxml::counter++;
842: }
843: $Apache::lonxml::counter_changed=1;
844: }
845:
846: sub init_counter {
847: if (defined($ENV{'form.counter'})) {
848: $Apache::lonxml::counter=$ENV{'form.counter'};
849: $Apache::lonxml::counter_changed=0;
850: } else {
851: $Apache::lonxml::counter=1;
852: $Apache::lonxml::counter_changed=1;
853: }
854: }
855:
856: sub store_counter {
857: &Apache::lonnet::appenv(('form.counter' => $Apache::lonxml::counter));
858: return '';
859: }
860:
861: sub get_all_text {
862: my($tag,$pars,$style)= @_;
863: &Apache::lonxml::debug("Got a ".ref($pars));
864: my $gotfullstack=1;
865: if (ref($pars) ne 'ARRAY') {
866: $gotfullstack=0;
867: $pars=[$pars];
868: }
869: &Apache::lonxml::debug("Got a ".ref($style));
870: if (ref($style) ne 'HASH') {
871: $style={};
872: } else {
873: &Apache::lonhomework::showhash(%$style);
874: }
875: my $depth=0;
876: my $token;
877: my $result='';
878: if ( $tag =~ m:^/: ) {
879: my $tag=substr($tag,1);
880: #&Apache::lonxml::debug("have:$tag:");
881: my $top_empty=0;
882: while (($depth >=0) && ($#$pars > -1) && (!$top_empty)) {
883: while (($depth >=0) && ($token = $$pars[-1]->get_token)) {
884: #&Apache::lonxml::debug("e token:$token->[0]:$depth:$token->[1]:".$#$pars.":".$#Apache::lonxml::pwd);
885: if (($token->[0] eq 'T')||($token->[0] eq 'C')||($token->[0] eq 'D')) {
886: $result.=$token->[1];
887: } elsif ($token->[0] eq 'PI') {
888: $result.=$token->[2];
889: } elsif ($token->[0] eq 'S') {
890: if ($token->[1] =~ /^$tag$/i) { $depth++; }
891: if ($token->[1] =~ /^LONCAPA_INTERNAL_TURN_STYLE_ON$/i) { $Apache::lonxml::usestyle=1; }
892: if ($token->[1] =~ /^LONCAPA_INTERNAL_TURN_STYLE_OFF$/i) { $Apache::lonxml::usestyle=0; }
893: $result.=$token->[4];
894: } elsif ($token->[0] eq 'E') {
895: if ( $token->[1] =~ /^$tag$/i) { $depth--; }
896: #skip sending back the last end tag
897: if ($depth == 0 && exists($$style{'/'.$token->[1]})) {
898: my $string=
899: '<LONCAPA_INTERNAL_TURN_STYLE_OFF end="yes" />'.
900: $$style{'/'.$token->[1]}.
901: $token->[2].
902: '<LONCAPA_INTERNAL_TURN_STYLE_ON />';
903: &Apache::lonxml::newparser($pars,\$string);
904: #&Apache::lonxml::debug("reParsing $string");
905: next;
906: }
907: if ($depth > -1) {
908: $result.=$token->[2];
909: } else {
910: $$pars[-1]->unget_token($token);
911: }
912: }
913: }
914: if (($depth >=0) && ($#$pars == 0) ) { $top_empty=1; }
915: if (($depth >=0) && ($#$pars > 0) ) {
916: pop(@$pars);
917: pop(@Apache::lonxml::pwd);
918: }
919: }
920: if ($top_empty && $depth >= 0) {
921: #never found the end tag ran out of text, throw error send back blank
922: &error('Never found end tag for <'.$tag.
923: '> current string <pre>'.
924: &HTML::Entities::encode($result).
925: '</pre>');
926: if ($gotfullstack) {
927: my $newstring='</'.$tag.'>'.$result;
928: &Apache::lonxml::newparser($pars,\$newstring);
929: }
930: $result='';
931: }
932: } else {
933: while ($#$pars > -1) {
934: while ($token = $$pars[-1]->get_token) {
935: #&Apache::lonxml::debug("s token:$token->[0]:$depth:$token->[1]");
936: if (($token->[0] eq 'T')||($token->[0] eq 'C')||
937: ($token->[0] eq 'D')) {
938: $result.=$token->[1];
939: } elsif ($token->[0] eq 'PI') {
940: $result.=$token->[2];
941: } elsif ($token->[0] eq 'S') {
942: if ( $token->[1] =~ /^$tag$/i) {
943: $$pars[-1]->unget_token($token); last;
944: } else {
945: $result.=$token->[4];
946: }
947: if ($token->[1] =~ /^LONCAPA_INTERNAL_TURN_STYLE_ON$/i) { $Apache::lonxml::usestyle=1; }
948: if ($token->[1] =~ /^LONCAPA_INTERNAL_TURN_STYLE_OFF$/i) { $Apache::lonxml::usestyle=0; }
949: } elsif ($token->[0] eq 'E') {
950: $result.=$token->[2];
951: }
952: }
953: if (($#$pars > 0) ) {
954: pop(@$pars);
955: pop(@Apache::lonxml::pwd);
956: } else { last; }
957: }
958: }
959: #&Apache::lonxml::debug("Exit:$result:");
960: return $result
961: }
962:
963: sub newparser {
964: my ($parser,$contentref,$dir) = @_;
965: push (@$parser,HTML::LCParser->new($contentref));
966: $$parser['-1']->xml_mode('1');
967: if ( $dir eq '' ) {
968: push (@Apache::lonxml::pwd, $Apache::lonxml::pwd[$#Apache::lonxml::pwd]);
969: } else {
970: push (@Apache::lonxml::pwd, $dir);
971: }
972: }
973:
974: sub parstring {
975: my ($token) = @_;
976: my $temp='';
977: foreach (@{$token->[3]}) {
978: unless ($_=~/\W/) {
979: my $val=$token->[2]->{$_};
980: $val =~ s/([\%\@\\\"\'])/\\$1/g;
981: #if ($val =~ m/^[\%\@]/) { $val="\\".$val; }
982: $temp .= "my \$$_=\"$val\";";
983: }
984: }
985: return $temp;
986: }
987:
988: sub writeallows {
989: unless ($#extlinks>=0) { return; }
990: my $thisurl='/res/'.&Apache::lonnet::declutter(shift);
991: if ($ENV{'httpref.'.$thisurl}) {
992: $thisurl=$ENV{'httpref.'.$thisurl};
993: }
994: my $thisdir=$thisurl;
995: $thisdir=~s/\/[^\/]+$//;
996: my %httpref=();
997: foreach (@extlinks) {
998: $httpref{'httpref.'.
999: &Apache::lonnet::hreflocation($thisdir,$_)}=$thisurl;
1000: }
1001: @extlinks=();
1002: &Apache::lonnet::appenv(%httpref);
1003: }
1004:
1005: #
1006: # Afterburner handles anchors, highlights and links
1007: #
1008: sub afterburn {
1009: my $result=shift;
1010: &Apache::loncommon::get_unprocessed_cgi($ENV{'QUERY_STRING'},
1011: ['highlight','anchor','link']);
1012: if ($ENV{'form.highlight'}) {
1013: foreach (split(/\,/,$ENV{'form.highlight'})) {
1014: my $anchorname=$_;
1015: my $matchthis=$anchorname;
1016: $matchthis=~s/\_+/\\s\+/g;
1017: $result=~s/($matchthis)/\<font color=\"red\"\>$1\<\/font\>/gs;
1018: }
1019: }
1020: if ($ENV{'form.link'}) {
1021: foreach (split(/\,/,$ENV{'form.link'})) {
1022: my ($anchorname,$linkurl)=split(/\>/,$_);
1023: my $matchthis=$anchorname;
1024: $matchthis=~s/\_+/\\s\+/g;
1025: $result=~s/($matchthis)/\<a href=\"$linkurl\"\>$1\<\/a\>/gs;
1026: }
1027: }
1028: if ($ENV{'form.anchor'}) {
1029: my $anchorname=$ENV{'form.anchor'};
1030: my $matchthis=$anchorname;
1031: $matchthis=~s/\_+/\\s\+/g;
1032: $result=~s/($matchthis)/\<a name=\"$anchorname\"\>$1\<\/a\>/s;
1033: $result.=(<<"ENDSCRIPT");
1034: <script type="text/javascript">
1035: document.location.hash='$anchorname';
1036: </script>
1037: ENDSCRIPT
1038: }
1039: return $result;
1040: }
1041:
1042: sub storefile {
1043: my ($file,$contents)=@_;
1044: if (my $fh=Apache::File->new('>'.$file)) {
1045: print $fh $contents;
1046: $fh->close();
1047: return 1;
1048: } else {
1049: &warning("Unable to save file $file");
1050: return 0;
1051: }
1052: }
1053:
1054: sub createnewhtml {
1055: my $filecontents=(<<SIMPLECONTENT);
1056: <html>
1057: <head>
1058: <title>
1059: Title of Document Goes Here
1060: </title>
1061: </head>
1062: <body bgcolor="#FFFFFF">
1063:
1064: Body of Document Goes Here
1065:
1066: </body>
1067: </html>
1068: SIMPLECONTENT
1069: return $filecontents;
1070: }
1071:
1072: sub createnewsty {
1073: my $filecontents=(<<SIMPLECONTENT);
1074: <definetag name="">
1075: <render>
1076: <web></web>
1077: <tex></tex>
1078: </render>
1079: </definetag>
1080: SIMPLECONTENT
1081: return $filecontents;
1082: }
1083:
1084:
1085: sub inserteditinfo {
1086: my ($result,$filecontents,$filetype)=@_;
1087: $filecontents = &HTML::Entities::encode($filecontents);
1088: # my $editheader='<a href="#editsection">Edit below</a><hr />';
1089: my $xml_help = '';
1090: if ($filetype eq 'html') {
1091: $xml_help=Apache::loncommon::helpLatexCheatsheet();
1092: }
1093: my $cleanbut = '';
1094: if ($filetype eq 'html') {
1095: $cleanbut='<input type="submit" name="attemptclean"
1096: value="Save and then attempt to clean HTML" />';
1097: }
1098: my $titledisplay=&display_title();
1099: my $buttons=(<<BUTTONS);
1100: $cleanbut
1101: <input type="submit" name="savethisfile" value="Save this" />
1102: <input type="submit" name="viewmode" value="View" />
1103: BUTTONS
1104: my $editfooter=(<<ENDFOOTER);
1105: <hr />
1106: <a name="editsection" />
1107: <form method="post">
1108: $xml_help
1109: <input type="hidden" name="editmode" value="Edit" />
1110: $buttons<br />
1111: <textarea cols="80" rows="40" name="filecont">$filecontents</textarea>
1112: <br />$buttons
1113: <br />
1114: </form>
1115: $titledisplay
1116: ENDFOOTER
1117: # $result=~s/(\<body[^\>]*\>)/$1$editheader/is;
1118: $result=~s/(\<\/body\>)/$editfooter/is;
1119: return $result;
1120: }
1121:
1122: sub get_target {
1123: my $viewgrades=&Apache::lonnet::allowed('vgr',$ENV{'request.course.id'});
1124: if ( $ENV{'request.state'} eq 'published') {
1125: if ( defined($ENV{'form.grade_target'})
1126: && ($viewgrades == 'F' )) {
1127: return ($ENV{'form.grade_target'});
1128: } elsif (defined($ENV{'form.grade_target'})) {
1129: if (($ENV{'form.grade_target'} eq 'web') ||
1130: ($ENV{'form.grade_target'} eq 'tex') ) {
1131: return $ENV{'form.grade_target'}
1132: } else {
1133: return 'web';
1134: }
1135: } else {
1136: return 'web';
1137: }
1138: } elsif ($ENV{'request.state'} eq 'construct') {
1139: if ( defined($ENV{'form.grade_target'})) {
1140: return ($ENV{'form.grade_target'});
1141: } else {
1142: return 'web';
1143: }
1144: } else {
1145: return 'web';
1146: }
1147: }
1148:
1149: sub handler {
1150: my $request=shift;
1151:
1152: my $target=&get_target();
1153:
1154: $Apache::lonxml::debug=$ENV{'user.debug'};
1155:
1156: if ($ENV{'browser.mathml'}) {
1157: $request->content_type('text/xml');
1158: } else {
1159: $request->content_type('text/html');
1160: }
1161: &Apache::loncommon::no_cache($request);
1162: $request->send_http_header;
1163:
1164: return OK if $request->header_only;
1165:
1166:
1167: my $file=&Apache::lonnet::filelocation("",$request->uri);
1168: my $filetype;
1169: if ($file =~ /\.sty$/) {
1170: $filetype='sty';
1171: } else {
1172: $filetype='html';
1173: }
1174: #
1175: # Edit action? Save file.
1176: #
1177: unless ($ENV{'request.state'} eq 'published') {
1178: if (($ENV{'form.savethisfile'}) || ($ENV{'form.attemptclean'})) {
1179: if (&storefile($file,$ENV{'form.filecont'})) {
1180: $request->print("<font COLOR=\"#0000FF\">Updated: ". strftime("%d %b %H:%M:%S",localtime())." </font>");
1181: }
1182: }
1183: }
1184: my %mystyle;
1185: my $result = '';
1186: my $filecontents=&Apache::lonnet::getfile($file);
1187: if ($filecontents eq -1) {
1188: $result=(<<ENDNOTFOUND);
1189: <html>
1190: <head>
1191: <title>File not found</title>
1192: </head>
1193: <body bgcolor="#FFFFFF">
1194: <b>File not found: $file</b>
1195: </body>
1196: </html>
1197: ENDNOTFOUND
1198: $filecontents='';
1199: if ($ENV{'request.state'} ne 'published') {
1200: if ($filetype eq 'sty') {
1201: $filecontents=&createnewsty();
1202: } else {
1203: $filecontents=&createnewhtml();
1204: }
1205: $ENV{'form.editmode'}='Edit'; #force edit mode
1206: }
1207: } else {
1208: unless ($ENV{'request.state'} eq 'published') {
1209: if ($ENV{'form.attemptclean'}) {
1210: $filecontents=&htmlclean($filecontents,1);
1211: }
1212: #
1213: # we are in construction space, see if edit mode forced
1214: &Apache::loncommon::get_unprocessed_cgi
1215: ($ENV{'QUERY_STRING'},['editmode']);
1216: }
1217: if (!$ENV{'form.editmode'} || $ENV{'form.viewmode'}) {
1218: $result = &Apache::lonxml::xmlparse($request,$target,$filecontents,
1219: '',%mystyle);
1220: }
1221: }
1222:
1223: #
1224: # Edit action? Insert editing commands
1225: #
1226: unless ($ENV{'request.state'} eq 'published') {
1227: if ($ENV{'form.editmode'} && (!($ENV{'form.viewmode'}))) {
1228: my $displayfile=$request->uri;
1229: $displayfile=~s/^\/[^\/]*//;
1230: $result='<html><body bgcolor="#FFFFFF"><h3>'.$displayfile.
1231: '</h3></body></html>';
1232: $result=&inserteditinfo($result,$filecontents,$filetype);
1233: }
1234: }
1235: if ($filetype eq 'html') { writeallows($request->uri); }
1236:
1237:
1238:
1239: $request->print($result);
1240:
1241: return OK;
1242: }
1243:
1244: sub display_title {
1245: my $result;
1246: if ($ENV{'request.state'} eq 'construct') {
1247: my $title=&Apache::lonnet::gettitle();
1248: if (!defined($title) || $title eq '') {
1249: $title = $ENV{'request.filename'};
1250: $title = substr($title, rindex($title, '/') + 1);
1251: }
1252: $result = "<script type='text/javascript'>top.document.title = '$title - LON-CAPA Construction Space';</script>";
1253: }
1254: return $result;
1255: }
1256:
1257: sub debug {
1258: if ($Apache::lonxml::debug eq 1) {
1259: $|=1;
1260: print('<font size="-2"<pre>DEBUG:'.&HTML::Entities::encode($_[0])."</pre></font>\n");
1261: }
1262: }
1263:
1264: sub error {
1265: $errorcount++;
1266: if (($Apache::lonxml::debug eq 1) || ($ENV{'request.state'} eq 'construct') ) {
1267: # If printing in construction space, put the error inside <pre></pre>
1268: print "<b>ERROR:</b>".join("\n",@_)."\n";
1269: } else {
1270: print "<b>An Error occured while processing this resource. The instructor has been notified.</b> <br />";
1271: #notify author
1272: &Apache::lonmsg::author_res_msg($ENV{'request.filename'},join('<br />',@_));
1273: #notify course
1274: if ( $ENV{'request.course.id'} ) {
1275: my (undef,%users)=&Apache::lonfeedback::decide_receiver(undef,0,1,1,1);
1276: my $declutter=&Apache::lonnet::declutter($ENV{'request.filename'});
1277: foreach (keys %users) {
1278: my ($user,$domain) = split(/:/, $_);
1279: &Apache::lonmsg::user_normal_msg($user,$domain,
1280: "Error [$declutter]",join('<br />',@_));
1281: }
1282: }
1283:
1284: #FIXME probably shouldn't have me get everything forever.
1285: &Apache::lonmsg::user_normal_msg('albertel','msu',"Error in $ENV{'request.filename'}",join('<br />',@_));
1286: #&Apache::lonmsg::user_normal_msg('albertel','103',"Error in $ENV{'request.filename'}",$_[0]);
1287: }
1288: }
1289:
1290: sub warning {
1291: $warningcount++;
1292:
1293: if ($ENV{'form.grade_target'} ne 'tex') {
1294: if ($ENV{'request.state'} eq 'construct' || $Apache::lonxml::debug) {
1295: print "<b>W</b>ARNING<b>:</b>".join('<br />',@_)."<br />\n";
1296: }
1297: }
1298: }
1299:
1300: sub get_param {
1301: my ($param,$parstack,$safeeval,$context,$case_insensitive) = @_;
1302: if ( ! $context ) { $context = -1; }
1303: my $args ='';
1304: if ( $#$parstack > (-2-$context) ) { $args=$$parstack[$context]; }
1305: if ( ! $args ) { return undef; }
1306: if ( $case_insensitive ) {
1307: if ($args =~ s/(my \$)(\Q$param\E)(=\")/$1.lc($2).$3/ei) {
1308: return &Apache::run::run("{$args;".'return $'.$param.'}',
1309: $safeeval); #'
1310: } else {
1311: return undef;
1312: }
1313: } else {
1314: if ( $args =~ /my \$\Q$param\E=\"/ ) {
1315: return &Apache::run::run("{$args;".'return $'.$param.'}',
1316: $safeeval); #'
1317: } else {
1318: return undef;
1319: }
1320: }
1321: }
1322:
1323: sub get_param_var {
1324: my ($param,$parstack,$safeeval,$context,$case_insensitive) = @_;
1325: if ( ! $context ) { $context = -1; }
1326: my $args ='';
1327: if ( $#$parstack > (-2-$context) ) { $args=$$parstack[$context]; }
1328: &Apache::lonxml::debug("Args are $args param is $param");
1329: if ($case_insensitive) {
1330: if (! ($args=~s/(my \$)(\Q$param\E)(=\")/$1.lc($2).$3/ei)) {
1331: return undef;
1332: }
1333: } elsif ( $args !~ /my \$\Q$param\E=\"/ ) { return undef; }
1334: my $value=&Apache::run::run("{$args;".'return $'.$param.'}',$safeeval); #'
1335: &Apache::lonxml::debug("first run is $value");
1336: if ($value =~ /^[\$\@\%]\w+$/) {
1337: &Apache::lonxml::debug("doing second");
1338: my @result=&Apache::run::run("return $value",$safeeval,1);
1339: if (!defined($result[0])) {
1340: return $value
1341: } else {
1342: if (wantarray) { return @result; } else { return $result[0]; }
1343: }
1344: } else {
1345: return $value;
1346: }
1347: }
1348:
1349: sub register_insert {
1350: my @data = split /\n/, &Apache::lonnet::getfile('/home/httpd/lonTabs/insertlist.tab');
1351: my $i;
1352: my $tagnum=0;
1353: my @order;
1354: for ($i=0;$i < $#data; $i++) {
1355: my $line = $data[$i];
1356: if ( $line =~ /^\#/ || $line =~ /^\s*\n/) { next; }
1357: if ( $line =~ /TABLE/ ) { last; }
1358: my ($tag,$descrip,$color,$function,$show,$helpfile,$helpdesc) = split(/,/, $line);
1359: if ($tag) {
1360: $insertlist{"$tagnum.tag"} = $tag;
1361: $insertlist{"$tagnum.description"} = $descrip;
1362: $insertlist{"$tagnum.color"} = $color;
1363: $insertlist{"$tagnum.function"} = $function;
1364: if (!defined($show)) { $show='yes'; }
1365: $insertlist{"$tagnum.show"}= $show;
1366: $insertlist{"$tagnum.helpfile"} = $helpfile;
1367: $insertlist{"$tagnum.helpdesc"} = $helpdesc;
1368: $insertlist{"$tag.num"}=$tagnum;
1369: $tagnum++;
1370: }
1371: }
1372: $i++; #skipping TABLE line
1373: $tagnum = 0;
1374: for (;$i < $#data;$i++) {
1375: my $line = $data[$i];
1376: my ($mnemonic,@which) = split(/ +/,$line);
1377: my $tag = $insertlist{"$tagnum.tag"};
1378: for (my $j=0;$j <=$#which;$j++) {
1379: if ( $which[$j] eq 'Y' ) {
1380: if ($insertlist{"$j.show"} ne 'no') {
1381: push(@{ $insertlist{"$tag.which"} },$j);
1382: }
1383: }
1384: }
1385: $tagnum++;
1386: }
1387: }
1388:
1389: sub description {
1390: my ($token)=@_;
1391: my $tagnum;
1392: my $tag=$token->[1];
1393: foreach my $namespace (reverse @Apache::lonxml::namespace) {
1394: my $testtag=$namespace.'::'.$tag;
1395: $tagnum=$insertlist{"$testtag.num"};
1396: if (defined($tagnum)) { last; }
1397: }
1398: if (!defined ($tagnum)) { $tagnum=$Apache::lonxml::insertlist{"$tag.num"}; }
1399: return $insertlist{$tagnum.'.description'};
1400: }
1401:
1402: # Returns a list containing the help file, and the description
1403: sub helpinfo {
1404: my ($token)=@_;
1405: my $tagnum;
1406: my $tag=$token->[1];
1407: foreach my $namespace (reverse @Apache::lonxml::namespace) {
1408: my $testtag=$namespace.'::'.$tag;
1409: $tagnum=$insertlist{"$testtag.num"};
1410: if (defined($tagnum)) { last; }
1411: }
1412: if (!defined ($tagnum)) { $tagnum=$Apache::lonxml::insertlist{"$tag.num"}; }
1413: return ($insertlist{$tagnum.'.helpfile'}, $insertlist{$tagnum.'.helpdesc'});
1414: }
1415:
1416: # ----------------------------------------------------------------- whichuser
1417: # returns a list of $symb, $courseid, $domain, $name that is correct for
1418: # calls to lonnet functions for this setup.
1419: # - looks for form.grade_ parameters
1420: sub whichuser {
1421: my ($passedsymb)=@_;
1422: my ($symb,$courseid,$domain,$name,$publicuser);
1423: if (defined($ENV{'form.grade_symb'})) {
1424: my $tmp_courseid=$ENV{'form.grade_courseid'};
1425: my $allowed=&Apache::lonnet::allowed('vgr',$tmp_courseid);
1426: if ($allowed) {
1427: $symb=$ENV{'form.grade_symb'};
1428: $courseid=$ENV{'form.grade_courseid'};
1429: $domain=$ENV{'form.grade_domain'};
1430: $name=$ENV{'form.grade_username'};
1431: }
1432: } else {
1433: if (!$passedsymb) {
1434: $symb=&Apache::lonnet::symbread();
1435: } else {
1436: $symb=$passedsymb;
1437: }
1438: $courseid=$ENV{'request.course.id'};
1439: $domain=$ENV{'user.domain'};
1440: $name=$ENV{'user.name'};
1441: if ($name eq 'public' && $domain eq 'public') {
1442: if (!defined($ENV{'form.username'})) {
1443: $ENV{'form.username'}.=time.rand(10000000);
1444: }
1445: $name.=$ENV{'form.username'};
1446: }
1447: }
1448: return ($symb,$courseid,$domain,$name,$publicuser);
1449: }
1450:
1451: 1;
1452: __END__
1453:
1454:
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