1: # The LearningOnline Network with CAPA
2: # XML Parser Module
3: #
4: # $Id: lonxml.pm,v 1.280 2003/09/21 21:40:06 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: use Apache::lonlocal;
109:
110: #================================================== Main subroutine: xmlparse
111: #debugging control, to turn on debugging modify the correct handler
112: $Apache::lonxml::debug=0;
113:
114: # keeps count of the number of warnings and errors generated in a parse
115: $warningcount=0;
116: $errorcount=0;
117:
118: #path to the directory containing the file currently being processed
119: @pwd=();
120:
121: #these two are used for capturing a subset of the output for later processing,
122: #don't touch them directly use &startredirection and &endredirection
123: @outputstack = ();
124: $redirection = 0;
125:
126: #controls wheter the <import> tag actually does
127: $import = 1;
128: @extlinks=();
129:
130: # meta mode is a bit weird only some output is to be turned off
131: #<output> tag turns metamode off (defined in londefdef.pm)
132: $metamode = 0;
133:
134: # turns on and of run::evaluate actually derefencing var refs
135: $evaluate = 1;
136:
137: # data structure for eidt mode, determines what tags can go into what other tags
138: %insertlist=();
139:
140: # stores the list of active tag namespaces
141: @namespace=();
142:
143: # if 0 all high ASCII characters will be encoded into HTML Entities
144: $prevent_entity_encode=0;
145:
146: # has the dynamic menu been updated to know about this resource
147: $Apache::lonxml::registered=0;
148:
149: # a pointer the the Apache request object
150: $Apache::lonxml::request='';
151:
152: # a problem number counter, and check on ether it is used
153: $Apache::lonxml::counter=1;
154: $Apache::lonxml::counter_changed=0;
155:
156: #internal check on whether to look at style defs
157: $Apache::lonxml::usestyle=1;
158:
159: #locations used to store the parameter string for style substitutions
160: $Apache::lonxml::style_values='';
161: $Apache::lonxml::style_end_values='';
162:
163: sub xmlbegin {
164: my $output='';
165: if ($ENV{'browser.mathml'}) {
166: $output='<?xml version="1.0"?>'
167: .'<?xml-stylesheet type="text/css" href="/adm/MathML/mathml.css"?>'
168: .'<!DOCTYPE html SYSTEM "/adm/MathML/mathml.dtd" '
169: .'[<!ENTITY mathns "http://www.w3.org/1998/Math/MathML">]>'
170: .'<html xmlns:math="http://www.w3.org/1998/Math/MathML" '
171: .'xmlns="http://www.w3.org/TR/REC-html40">';
172: } else {
173: $output='<html>';
174: }
175: return $output;
176: }
177:
178: sub xmlend {
179: my $mode='xml';
180: my $status='OPEN';
181: if ($Apache::lonhomework::parsing_a_problem) {
182: $mode='problem';
183: $status=$Apache::inputtags::status[-1];
184: }
185: return &Apache::lonfeedback::list_discussion().'</html>';
186: }
187:
188: sub tokeninputfield {
189: my $defhost=$Apache::lonnet::perlvar{'lonHostID'};
190: $defhost=~tr/a-z/A-Z/;
191: return (<<ENDINPUTFIELD)
192: <script type="text/javascript">
193: function updatetoken() {
194: var comp=new Array;
195: var barcode=unescape(document.tokeninput.barcode.value);
196: comp=barcode.split('*');
197: if (typeof(comp[0])!="undefined") {
198: document.tokeninput.codeone.value=comp[0];
199: }
200: if (typeof(comp[1])!="undefined") {
201: document.tokeninput.codetwo.value=comp[1];
202: }
203: if (typeof(comp[2])!="undefined") {
204: comp[2]=comp[2].toUpperCase();
205: document.tokeninput.codethree.value=comp[2];
206: }
207: document.tokeninput.barcode.value='';
208: }
209: </script>
210: <form method="post" name="tokeninput">
211: <table border="2" bgcolor="#FFFFBB">
212: <tr><th>DocID Checkin</th></tr>
213: <tr><td>
214: <table>
215: <tr>
216: <td>Scan in Barcode</td>
217: <td><input type="text" size="22" name="barcode"
218: onChange="updatetoken()"/></td>
219: </tr>
220: <tr><td><i>or</i> Type in DocID</td>
221: <td>
222: <input type="text" size="5" name="codeone" />
223: <b><font size="+2">*</font></b>
224: <input type="text" size="5" name="codetwo" />
225: <b><font size="+2">*</font></b>
226: <input type="text" size="10" name="codethree" value="$defhost"
227: onChange="this.value=this.value.toUpperCase()" />
228: </td></tr>
229: </table>
230: </td></tr>
231: <tr><td><input type="submit" value="Check in DocID" /></td></tr>
232: </table>
233: </form>
234: ENDINPUTFIELD
235: }
236:
237: sub maketoken {
238: my ($symb,$tuname,$tudom,$tcrsid)=@_;
239: unless ($symb) {
240: $symb=&Apache::lonnet::symbread();
241: }
242: unless ($tuname) {
243: $tuname=$ENV{'user.name'};
244: $tudom=$ENV{'user.domain'};
245: $tcrsid=$ENV{'request.course.id'};
246: }
247:
248: return &Apache::lonnet::checkout($symb,$tuname,$tudom,$tcrsid);
249: }
250:
251: sub printtokenheader {
252: my ($target,$token,$tsymb,$tcrsid,$tudom,$tuname)=@_;
253: unless ($token) { return ''; }
254:
255: my ($symb,$courseid,$domain,$name) = &Apache::lonxml::whichuser();
256: unless ($tsymb) {
257: $tsymb=$symb;
258: }
259: unless ($tuname) {
260: $tuname=$name;
261: $tudom=$domain;
262: $tcrsid=$courseid;
263: }
264:
265: my %reply=&Apache::lonnet::get('environment',
266: ['firstname','middlename','lastname','generation'],
267: $tudom,$tuname);
268: my $plainname=$reply{'firstname'}.' '.
269: $reply{'middlename'}.' '.
270: $reply{'lastname'}.' '.
271: $reply{'generation'};
272:
273: if ($target eq 'web') {
274: my %idhash=&Apache::lonnet::idrget($tudom,($tuname));
275: return
276: '<img align="right" src="/cgi-bin/barcode.png?encode='.$token.'" />'.
277: 'Checked out for '.$plainname.
278: '<br />User: '.$tuname.' at '.$tudom.
279: '<br />ID: '.$idhash{$tuname}.
280: '<br />CourseID: '.$tcrsid.
281: '<br />Course: '.$ENV{'course.'.$tcrsid.'.description'}.
282: '<br />DocID: '.$token.
283: '<br />Time: '.localtime().'<hr />';
284: } else {
285: return $token;
286: }
287: }
288:
289: sub fontsettings() {
290: my $headerstring='';
291: if (($ENV{'browser.os'} eq 'mac') && (!$ENV{'browser.mathml'})) {
292: $headerstring.=
293: '<meta Content-Type="text/html; charset=x-mac-roman">';
294: } elsif (!$ENV{'browser.mathml'} && $ENV{'browser.unicode'}) {
295: $headerstring.=
296: '<meta http-equiv="Content-Type" content="text/html; charset=utf-8" />';
297: }
298: return $headerstring;
299: }
300:
301: sub printalltags {
302: my $temp;
303: foreach $temp (sort keys %Apache::lonxml::alltags) {
304: &Apache::lonxml::debug("$temp -- ".
305: join(',',@{ $Apache::lonxml::alltags{$temp} }));
306: }
307: }
308:
309: sub xmlparse {
310: my ($request,$target,$content_file_string,$safeinit,%style_for_target) = @_;
311:
312: &setup_globals($request,$target);
313: &Apache::inputtags::initialize_inputtags();
314: &Apache::outputtags::initialize_outputtags();
315: &Apache::edit::initialize_edit();
316:
317: #
318: # do we have a course style file?
319: #
320:
321: if ($ENV{'request.course.id'} && $ENV{'request.state'} ne 'construct') {
322: my $bodytext=
323: $ENV{'course.'.$ENV{'request.course.id'}.'.default_xml_style'};
324: if ($bodytext) {
325: my $location=&Apache::lonnet::filelocation('',$bodytext);
326: my $styletext=&Apache::lonnet::getfile($location);
327: if ($styletext ne '-1') {
328: %style_for_target = (%style_for_target,
329: &Apache::style::styleparser($target,$styletext));
330: }
331: }
332: }
333: #&printalltags();
334: my @pars = ();
335: my $pwd=$ENV{'request.filename'};
336: $pwd =~ s:/[^/]*$::;
337: &newparser(\@pars,\$content_file_string,$pwd);
338:
339: my $safeeval = new Safe;
340: my $safehole = new Safe::Hole;
341: &init_safespace($target,$safeeval,$safehole,$safeinit);
342: #-------------------- Redefinition of the target in the case of compound target
343:
344: ($target, my @tenta) = split('&&',$target);
345:
346: my @stack = ();
347: my @parstack = ();
348: &initdepth;
349:
350: my $finaloutput = &inner_xmlparse($target,\@stack,\@parstack,\@pars,
351: $safeeval,\%style_for_target);
352:
353: if ($ENV{'request.uri'}) {
354: &writeallows($ENV{'request.uri'});
355: }
356: if ($Apache::lonxml::counter_changed) { &store_counter() }
357: return $finaloutput;
358: }
359:
360: sub htmlclean {
361: my ($raw,$full)=@_;
362:
363: my $tree = HTML::TreeBuilder->new;
364: $tree->ignore_unknown(0);
365:
366: $tree->parse($raw);
367:
368: my $output= $tree->as_HTML(undef,' ');
369:
370: $output=~s/\<(br|hr|img|meta|allow)(.*?)\>/\<$1$2 \/\>/gis;
371: $output=~s/\<\/(br|hr|img|meta|allow)\>//gis;
372: unless ($full) {
373: $output=~s/\<[\/]*(body|head|html)\>//gis;
374: }
375:
376: $tree = $tree->delete;
377:
378: return $output;
379: }
380:
381: sub latex_special_symbols {
382: my ($string,$where)=@_;
383: if ($where eq 'header') {
384: $string =~ s/(\\|_|\^)/ /g;
385: $string =~ s/(\$|%|\#|&|\{|\})/\\$1/g;
386: $string =~ s/_/ /g;
387: } else {
388: $string=~s/\\ /\\char92 /g;
389: $string=~s/\^/\\char94 /g;
390: $string=~s/\~/\\char126 /g;
391: $string=~s/(&[^A-Za-z\#])/\\$1/g;
392: $string=~s/([^&])\#/$1\\#/g;
393: $string=~s/(\$|_|{|})/\\$1/g;
394: $string=~s/\\char92 /\\texttt{\\char92}/g;
395: $string=~s/(>|<)/\$$1\$/g; #more or less
396: if ($string=~m/\d%/) {$string =~ s/(\d)%/$1\\%/g;} #percent after digit
397: if ($string=~m/\s%/) {$string =~ s/(\s)%/$1\\%/g;} #percent after space
398: if ($string eq '%.') {$string = '\%.';} #percent at the end of statement
399: }
400: return $string;
401: }
402:
403: sub inner_xmlparse {
404: my ($target,$stack,$parstack,$pars,$safeeval,$style_for_target)=@_;
405: my $finaloutput = '';
406: my $result;
407: my $token;
408: my $dontpop=0;
409: while ( $#$pars > -1 ) {
410: while ($token = $$pars['-1']->get_token) {
411: if (($token->[0] eq 'T') || ($token->[0] eq 'C') ) {
412: if ($metamode<1) {
413: my $text=$token->[1];
414: if ($token->[0] eq 'C' && $target eq 'tex') {
415: $text = '';
416: # $text = '%'.$text."\n";
417: }
418: $result.=$text;
419: }
420: } elsif (($token->[0] eq 'D')) {
421: if ($metamode<1 && $target eq 'web') {
422: my $text=$token->[1];
423: $result.=$text;
424: }
425: } elsif ($token->[0] eq 'PI') {
426: if ($metamode<1 && $target eq 'web') {
427: $result=$token->[2];
428: }
429: } elsif ($token->[0] eq 'S') {
430: # add tag to stack
431: push (@$stack,$token->[1]);
432: # add parameters list to another stack
433: push (@$parstack,&parstring($token));
434: &increasedepth($token);
435: if ($Apache::lonxml::usestyle &&
436: exists($$style_for_target{$token->[1]})) {
437: $Apache::lonxml::usestyle=0;
438: my $string=$$style_for_target{$token->[1]}.
439: '<LONCAPA_INTERNAL_TURN_STYLE_ON />';
440: &Apache::lonxml::newparser($pars,\$string);
441: $Apache::lonxml::style_values=$$parstack[-1];
442: $Apache::lonxml::style_end_values=$$parstack[-1];
443: } else {
444: $result = &callsub("start_$token->[1]", $target, $token, $stack,
445: $parstack, $pars, $safeeval, $style_for_target);
446: }
447: } elsif ($token->[0] eq 'E') {
448: if ($Apache::lonxml::usestyle &&
449: exists($$style_for_target{'/'."$token->[1]"})) {
450: $Apache::lonxml::usestyle=0;
451: my $string=$$style_for_target{'/'.$token->[1]}.
452: '<LONCAPA_INTERNAL_TURN_STYLE_ON end="'.$token->[1].'" />';
453: &Apache::lonxml::newparser($pars,\$string);
454: $Apache::lonxml::style_values=$Apache::lonxml::style_end_values;
455: $Apache::lonxml::style_end_values='';
456: $dontpop=1;
457: } else {
458: #clear out any tags that didn't end
459: while ($token->[1] ne $$stack['-1'] && ($#$stack > -1)) {
460: my $lasttag=$$stack[-1];
461: if ($token->[1] =~ /^$lasttag$/i) {
462: &Apache::lonxml::warning('Using tag </'.$token->[1].'> on line '.$token->[3].' as end tag to <'.$$stack[-1].'>');
463: last;
464: } else {
465: &Apache::lonxml::warning('Found tag </'.$token->[1].'> on line '.$token->[3].' when looking for </'.$$stack[-1].'> in file');
466: &end_tag($stack,$parstack,$token);
467: }
468: }
469: $result = &callsub("end_$token->[1]", $target, $token, $stack,
470: $parstack, $pars,$safeeval, $style_for_target);
471: }
472: } else {
473: &Apache::lonxml::error("Unknown token event :$token->[0]:$token->[1]:");
474: }
475: #evaluate variable refs in result
476: if ($result ne "") {
477: my $extras;
478: if (!$Apache::lonxml::usestyle) {
479: $extras=$Apache::lonxml::style_values;
480: }
481: if ( $#$parstack > -1 ) {
482: $result=&Apache::run::evaluate($result,$safeeval,$extras.$$parstack[-1]);
483: } else {
484: $result= &Apache::run::evaluate($result,$safeeval,$extras);
485: }
486: }
487: if (($token->[0] eq 'T') || ($token->[0] eq 'C') || ($token->[0] eq 'D') ) {
488: #Style file definitions should be correct
489: if ($target eq 'tex' && ($Apache::lonxml::usestyle)) {
490: $result=&latex_special_symbols($result);
491: }
492: }
493:
494: # Encode any high ASCII characters
495: # if (!$Apache::lonxml::prevent_entity_encode) {
496: # $result=&HTML::Entities::encode($result,"\200-\377");
497: # }
498: if ($Apache::lonxml::redirection) {
499: $Apache::lonxml::outputstack['-1'] .= $result;
500: } else {
501: $finaloutput.=$result;
502: }
503: $result = '';
504:
505: if ($token->[0] eq 'E' && !$dontpop) {
506: &end_tag($stack,$parstack,$token);
507: }
508: $dontpop=0;
509: }
510: if ($#$pars > -1) {
511: pop @$pars;
512: pop @Apache::lonxml::pwd;
513: }
514: }
515:
516: # if ($target eq 'meta') {
517: # $finaloutput.=&endredirection;
518: # }
519:
520:
521: if (($ENV{'QUERY_STRING'}) && ($target eq 'web')) {
522: $finaloutput=&afterburn($finaloutput);
523: }
524: return $finaloutput;
525: }
526:
527: sub callsub {
528: my ($sub,$target,$token,$tagstack,$parstack,$parser,$safeeval,$style)=@_;
529: my $currentstring='';
530: my $nodefault;
531: {
532: my $sub1;
533: no strict 'refs';
534: my $tag=$token->[1];
535: # get utterly rid of extended html tags
536: if ($tag=~/^x\-/i) { return ''; }
537: my $space=$Apache::lonxml::alltags{$tag}[-1];
538: if (!$space) {
539: $tag=~tr/A-Z/a-z/;
540: $sub=~tr/A-Z/a-z/;
541: $space=$Apache::lonxml::alltags{$tag}[-1]
542: }
543:
544: my $deleted=0;
545: $Apache::lonxml::curdepth=join('_',@Apache::lonxml::depthcounter);
546: if (($token->[0] eq 'S') && ($target eq 'modified')) {
547: $deleted=&Apache::edit::handle_delete($space,$target,$token,$tagstack,
548: $parstack,$parser,$safeeval,
549: $style);
550: }
551: if (!$deleted) {
552: if ($space) {
553: #&Apache::lonxml::debug("Calling sub $sub in $space $metamode");
554: $sub1="$space\:\:$sub";
555: ($currentstring,$nodefault) = &$sub1($target,$token,$tagstack,
556: $parstack,$parser,$safeeval,
557: $style);
558: } else {
559: #&Apache::lonxml::debug("NOT Calling sub $sub in $space $metamode");
560: if ($metamode <1) {
561: if (defined($token->[4]) && ($metamode < 1)) {
562: $currentstring = $token->[4];
563: } else {
564: $currentstring = $token->[2];
565: }
566: }
567: }
568: # &Apache::lonxml::debug("nodefalt:$nodefault:");
569: if ($currentstring eq '' && $nodefault eq '') {
570: if ($target eq 'edit') {
571: #&Apache::lonxml::debug("doing default edit for $token->[1]");
572: if ($token->[0] eq 'S') {
573: $currentstring = &Apache::edit::tag_start($target,$token);
574: } elsif ($token->[0] eq 'E') {
575: $currentstring = &Apache::edit::tag_end($target,$token);
576: }
577: } elsif ($target eq 'modified') {
578: if ($token->[0] eq 'S') {
579: $currentstring = $token->[4];
580: $currentstring.=&Apache::edit::handle_insert();
581: } elsif ($token->[0] eq 'E') {
582: $currentstring = $token->[2];
583: $currentstring.=&Apache::edit::handle_insertafter($token->[1]);
584: } else {
585: $currentstring = $token->[2];
586: }
587: }
588: }
589: }
590: use strict 'refs';
591: }
592: return $currentstring;
593: }
594:
595: sub setup_globals {
596: my ($request,$target)=@_;
597: $Apache::lonxml::request=$request;
598: $Apache::lonxml::registered = 0;
599: $errorcount=0;
600: $warningcount=0;
601: $Apache::lonxml::default_homework_loaded=0;
602: $Apache::lonxml::usestyle=1;
603: &init_counter();
604: @Apache::lonxml::pwd=();
605: @Apache::lonxml::extlinks=();
606: if ($target eq 'meta') {
607: $Apache::lonxml::redirection = 0;
608: $Apache::lonxml::metamode = 1;
609: $Apache::lonxml::evaluate = 1;
610: $Apache::lonxml::import = 0;
611: } elsif ($target eq 'answer') {
612: $Apache::lonxml::redirection = 0;
613: $Apache::lonxml::metamode = 1;
614: $Apache::lonxml::evaluate = 1;
615: $Apache::lonxml::import = 1;
616: } elsif ($target eq 'grade') {
617: &startredirection;
618: $Apache::lonxml::metamode = 0;
619: $Apache::lonxml::evaluate = 1;
620: $Apache::lonxml::import = 1;
621: } elsif ($target eq 'modified') {
622: $Apache::lonxml::redirection = 0;
623: $Apache::lonxml::metamode = 0;
624: $Apache::lonxml::evaluate = 0;
625: $Apache::lonxml::import = 0;
626: } elsif ($target eq 'edit') {
627: $Apache::lonxml::redirection = 0;
628: $Apache::lonxml::metamode = 0;
629: $Apache::lonxml::evaluate = 0;
630: $Apache::lonxml::import = 0;
631: } elsif ($target eq 'analyze') {
632: $Apache::lonxml::redirection = 0;
633: $Apache::lonxml::metamode = 0;
634: $Apache::lonxml::evaluate = 1;
635: $Apache::lonxml::import = 1;
636: } else {
637: $Apache::lonxml::redirection = 0;
638: $Apache::lonxml::metamode = 0;
639: $Apache::lonxml::evaluate = 1;
640: $Apache::lonxml::import = 1;
641: }
642: }
643:
644: sub init_safespace {
645: my ($target,$safeeval,$safehole,$safeinit) = @_;
646: $safeeval->permit("entereval");
647: $safeeval->permit(":base_math");
648: $safeeval->permit("sort");
649: $safeeval->deny(":base_io");
650: $safehole->wrap(\&Apache::scripttag::xmlparse,$safeeval,'&xmlparse');
651: $safehole->wrap(\&Apache::outputtags::multipart,$safeeval,'&multipart');
652: $safehole->wrap(\&Apache::lonnet::EXT,$safeeval,'&EXT');
653:
654: $safehole->wrap(\&Math::Cephes::asin,$safeeval,'&asin');
655: $safehole->wrap(\&Math::Cephes::acos,$safeeval,'&acos');
656: $safehole->wrap(\&Math::Cephes::atan,$safeeval,'&atan');
657: $safehole->wrap(\&Math::Cephes::sinh,$safeeval,'&sinh');
658: $safehole->wrap(\&Math::Cephes::cosh,$safeeval,'&cosh');
659: $safehole->wrap(\&Math::Cephes::tanh,$safeeval,'&tanh');
660: $safehole->wrap(\&Math::Cephes::asinh,$safeeval,'&asinh');
661: $safehole->wrap(\&Math::Cephes::acosh,$safeeval,'&acosh');
662: $safehole->wrap(\&Math::Cephes::atanh,$safeeval,'&atanh');
663: $safehole->wrap(\&Math::Cephes::erf,$safeeval,'&erf');
664: $safehole->wrap(\&Math::Cephes::erfc,$safeeval,'&erfc');
665: $safehole->wrap(\&Math::Cephes::j0,$safeeval,'&j0');
666: $safehole->wrap(\&Math::Cephes::j1,$safeeval,'&j1');
667: $safehole->wrap(\&Math::Cephes::jn,$safeeval,'&jn');
668: $safehole->wrap(\&Math::Cephes::jv,$safeeval,'&jv');
669: $safehole->wrap(\&Math::Cephes::y0,$safeeval,'&y0');
670: $safehole->wrap(\&Math::Cephes::y1,$safeeval,'&y1');
671: $safehole->wrap(\&Math::Cephes::yn,$safeeval,'&yn');
672: $safehole->wrap(\&Math::Cephes::yv,$safeeval,'&yv');
673:
674: $safehole->wrap(\&Math::Cephes::bdtr ,$safeeval,'&bdtr' );
675: $safehole->wrap(\&Math::Cephes::bdtrc ,$safeeval,'&bdtrc' );
676: $safehole->wrap(\&Math::Cephes::bdtri ,$safeeval,'&bdtri' );
677: $safehole->wrap(\&Math::Cephes::btdtr ,$safeeval,'&btdtr' );
678: $safehole->wrap(\&Math::Cephes::chdtr ,$safeeval,'&chdtr' );
679: $safehole->wrap(\&Math::Cephes::chdtrc,$safeeval,'&chdtrc');
680: $safehole->wrap(\&Math::Cephes::chdtri,$safeeval,'&chdtri');
681: $safehole->wrap(\&Math::Cephes::fdtr ,$safeeval,'&fdtr' );
682: $safehole->wrap(\&Math::Cephes::fdtrc ,$safeeval,'&fdtrc' );
683: $safehole->wrap(\&Math::Cephes::fdtri ,$safeeval,'&fdtri' );
684: $safehole->wrap(\&Math::Cephes::gdtr ,$safeeval,'&gdtr' );
685: $safehole->wrap(\&Math::Cephes::gdtrc ,$safeeval,'&gdtrc' );
686: $safehole->wrap(\&Math::Cephes::nbdtr ,$safeeval,'&nbdtr' );
687: $safehole->wrap(\&Math::Cephes::nbdtrc,$safeeval,'&nbdtrc');
688: $safehole->wrap(\&Math::Cephes::nbdtri,$safeeval,'&nbdtri');
689: $safehole->wrap(\&Math::Cephes::ndtr ,$safeeval,'&ndtr' );
690: $safehole->wrap(\&Math::Cephes::ndtri ,$safeeval,'&ndtri' );
691: $safehole->wrap(\&Math::Cephes::pdtr ,$safeeval,'&pdtr' );
692: $safehole->wrap(\&Math::Cephes::pdtrc ,$safeeval,'&pdtrc' );
693: $safehole->wrap(\&Math::Cephes::pdtri ,$safeeval,'&pdtri' );
694: $safehole->wrap(\&Math::Cephes::stdtr ,$safeeval,'&stdtr' );
695: $safehole->wrap(\&Math::Cephes::stdtri,$safeeval,'&stdtri');
696:
697: # $safehole->wrap(\&Math::Cephes::new_fract,$safeeval,'&new_fract');
698: # $safehole->wrap(\&Math::Cephes::radd,$safeeval,'&radd');
699: # $safehole->wrap(\&Math::Cephes::rsub,$safeeval,'&rsub');
700: # $safehole->wrap(\&Math::Cephes::rmul,$safeeval,'&rmul');
701: # $safehole->wrap(\&Math::Cephes::rdiv,$safeeval,'&rdiv');
702: # $safehole->wrap(\&Math::Cephes::euclid,$safeeval,'&euclid');
703:
704: $safehole->wrap(\&Math::Random::random_beta,$safeeval,'&math_random_beta');
705: $safehole->wrap(\&Math::Random::random_chi_square,$safeeval,'&math_random_chi_square');
706: $safehole->wrap(\&Math::Random::random_exponential,$safeeval,'&math_random_exponential');
707: $safehole->wrap(\&Math::Random::random_f,$safeeval,'&math_random_f');
708: $safehole->wrap(\&Math::Random::random_gamma,$safeeval,'&math_random_gamma');
709: $safehole->wrap(\&Math::Random::random_multivariate_normal,$safeeval,'&math_random_multivariate_normal');
710: $safehole->wrap(\&Math::Random::random_multinomial,$safeeval,'&math_random_multinomial');
711: $safehole->wrap(\&Math::Random::random_noncentral_chi_square,$safeeval,'&math_random_noncentral_chi_square');
712: $safehole->wrap(\&Math::Random::random_noncentral_f,$safeeval,'&math_random_noncentral_f');
713: $safehole->wrap(\&Math::Random::random_normal,$safeeval,'&math_random_normal');
714: $safehole->wrap(\&Math::Random::random_permutation,$safeeval,'&math_random_permutation');
715: $safehole->wrap(\&Math::Random::random_permuted_index,$safeeval,'&math_random_permuted_index');
716: $safehole->wrap(\&Math::Random::random_uniform,$safeeval,'&math_random_uniform');
717: $safehole->wrap(\&Math::Random::random_poisson,$safeeval,'&math_random_poisson');
718: $safehole->wrap(\&Math::Random::random_uniform_integer,$safeeval,'&math_random_uniform_integer');
719: $safehole->wrap(\&Math::Random::random_negative_binomial,$safeeval,'&math_random_negative_binomial');
720: $safehole->wrap(\&Math::Random::random_binomial,$safeeval,'&math_random_binomial');
721: $safehole->wrap(\&Math::Random::random_seed_from_phrase,$safeeval,'&random_seed_from_phrase');
722: $safehole->wrap(\&Math::Random::random_set_seed_from_phrase,$safeeval,'&random_set_seed_from_phrase');
723: $safehole->wrap(\&Math::Random::random_get_seed,$safeeval,'&random_get_seed');
724: $safehole->wrap(\&Math::Random::random_set_seed,$safeeval,'&random_set_seed');
725:
726: #need to inspect this class of ops
727: # $safeeval->deny(":base_orig");
728: $safeinit .= ';$external::target="'.$target.'";';
729: my $rndseed;
730: my ($symb,$courseid,$domain,$name) = &Apache::lonxml::whichuser();
731: $rndseed=&Apache::lonnet::rndseed($symb,$courseid,$domain,$name);
732: $safeinit .= ';$external::randomseed='.$rndseed.';';
733: &Apache::lonxml::debug("Setting rndseed to $rndseed");
734: &Apache::run::run($safeinit,$safeeval);
735: }
736:
737: sub default_homework_load {
738: my ($safeeval)=@_;
739: &Apache::lonxml::debug('Loading default_homework');
740: my $default=&Apache::lonnet::getfile('/home/httpd/html/res/adm/includes/default_homework.lcpm');
741: if ($default eq -1) {
742: &Apache::lonxml::error("<b>Unable to find <i>default_homework.lcpm</i></b>");
743: } else {
744: &Apache::run::run($default,$safeeval);
745: $Apache::lonxml::default_homework_loaded=1;
746: }
747: }
748:
749: sub startredirection {
750: $Apache::lonxml::redirection++;
751: push (@Apache::lonxml::outputstack, '');
752: }
753:
754: sub endredirection {
755: if (!$Apache::lonxml::redirection) {
756: &Apache::lonxml::error("Endredirection was called, before a startredirection, perhaps you have unbalanced tags. Some debuging information:".join ":",caller);
757: return '';
758: }
759: $Apache::lonxml::redirection--;
760: pop @Apache::lonxml::outputstack;
761: }
762:
763: sub end_tag {
764: my ($tagstack,$parstack,$token)=@_;
765: pop(@$tagstack);
766: pop(@$parstack);
767: &decreasedepth($token);
768: }
769:
770: sub initdepth {
771: @Apache::lonxml::depthcounter=();
772: $Apache::lonxml::depth=-1;
773: $Apache::lonxml::olddepth=-1;
774: }
775:
776: sub increasedepth {
777: my ($token) = @_;
778: $Apache::lonxml::depth++;
779: $Apache::lonxml::depthcounter[$Apache::lonxml::depth]++;
780: if ($Apache::lonxml::depthcounter[$Apache::lonxml::depth]==1) {
781: $Apache::lonxml::olddepth=$Apache::lonxml::depth;
782: }
783: my $curdepth=join('_',@Apache::lonxml::depthcounter);
784: &Apache::lonxml::debug("s $Apache::lonxml::depth : $Apache::lonxml::olddepth : $curdepth : $token->[1]\n");
785: #print "<br />s $Apache::lonxml::depth : $Apache::lonxml::olddepth : $curdepth : $token->[1]\n";
786: }
787:
788: sub decreasedepth {
789: my ($token) = @_;
790: $Apache::lonxml::depth--;
791: if ($Apache::lonxml::depth<$Apache::lonxml::olddepth-1) {
792: $#Apache::lonxml::depthcounter--;
793: $Apache::lonxml::olddepth=$Apache::lonxml::depth+1;
794: }
795: if ( $Apache::lonxml::depth < -1) {
796: &Apache::lonxml::warning(&mt("Missing tags, unable to properly run file."));
797: $Apache::lonxml::depth='-1';
798: }
799: my $curdepth=join('_',@Apache::lonxml::depthcounter);
800: &Apache::lonxml::debug("e $Apache::lonxml::depth : $Apache::lonxml::olddepth : $token->[1] : $curdepth\n");
801: #print "<br />e $Apache::lonxml::depth : $Apache::lonxml::olddepth : $token->[1] : $curdepth\n";
802: }
803:
804: sub get_all_text_unbalanced {
805: #there is a copy of this in lonpublisher.pm
806: my($tag,$pars)= @_;
807: my $token;
808: my $result='';
809: $tag='<'.$tag.'>';
810: while ($token = $$pars[-1]->get_token) {
811: if (($token->[0] eq 'T')||($token->[0] eq 'C')||($token->[0] eq 'D')) {
812: $result.=$token->[1];
813: } elsif ($token->[0] eq 'PI') {
814: $result.=$token->[2];
815: } elsif ($token->[0] eq 'S') {
816: $result.=$token->[4];
817: } elsif ($token->[0] eq 'E') {
818: $result.=$token->[2];
819: }
820: if ($result =~ /(.*)\Q$tag\E(.*)/s) {
821: &Apache::lonxml::debug('Got a winner with leftovers ::'.$2);
822: &Apache::lonxml::debug('Result is :'.$1);
823: $result=$1;
824: my $redo=$tag.$2;
825: &Apache::lonxml::newparser($pars,\$redo);
826: last;
827: }
828: }
829: return $result
830: }
831:
832: sub increment_counter {
833: my ($increment) = @_;
834: if (defined($increment) && $increment gt 0) {
835: $Apache::lonxml::counter+=$increment;
836: } else {
837: $Apache::lonxml::counter++;
838: }
839: $Apache::lonxml::counter_changed=1;
840: }
841:
842: sub init_counter {
843: if (defined($ENV{'form.counter'})) {
844: $Apache::lonxml::counter=$ENV{'form.counter'};
845: $Apache::lonxml::counter_changed=0;
846: } else {
847: $Apache::lonxml::counter=1;
848: $Apache::lonxml::counter_changed=1;
849: }
850: }
851:
852: sub store_counter {
853: &Apache::lonnet::appenv(('form.counter' => $Apache::lonxml::counter));
854: return '';
855: }
856:
857: sub get_all_text {
858: my($tag,$pars,$style)= @_;
859: &Apache::lonxml::debug("Got a ".ref($pars));
860: my $gotfullstack=1;
861: if (ref($pars) ne 'ARRAY') {
862: $gotfullstack=0;
863: $pars=[$pars];
864: }
865: &Apache::lonxml::debug("Got a ".ref($style));
866: if (ref($style) ne 'HASH') {
867: $style={};
868: } else {
869: &Apache::lonhomework::showhash(%$style);
870: }
871: my $depth=0;
872: my $token;
873: my $result='';
874: if ( $tag =~ m:^/: ) {
875: my $tag=substr($tag,1);
876: #&Apache::lonxml::debug("have:$tag:");
877: my $top_empty=0;
878: while (($depth >=0) && ($#$pars > -1) && (!$top_empty)) {
879: while (($depth >=0) && ($token = $$pars[-1]->get_token)) {
880: #&Apache::lonxml::debug("e token:$token->[0]:$depth:$token->[1]:".$#$pars.":".$#Apache::lonxml::pwd);
881: if (($token->[0] eq 'T')||($token->[0] eq 'C')||($token->[0] eq 'D')) {
882: $result.=$token->[1];
883: } elsif ($token->[0] eq 'PI') {
884: $result.=$token->[2];
885: } elsif ($token->[0] eq 'S') {
886: if ($token->[1] =~ /^$tag$/i) { $depth++; }
887: if ($token->[1] =~ /^LONCAPA_INTERNAL_TURN_STYLE_ON$/i) { $Apache::lonxml::usestyle=1; }
888: if ($token->[1] =~ /^LONCAPA_INTERNAL_TURN_STYLE_OFF$/i) { $Apache::lonxml::usestyle=0; }
889: $result.=$token->[4];
890: } elsif ($token->[0] eq 'E') {
891: if ( $token->[1] =~ /^$tag$/i) { $depth--; }
892: #skip sending back the last end tag
893: if ($depth == 0 && exists($$style{'/'.$token->[1]})) {
894: my $string=
895: '<LONCAPA_INTERNAL_TURN_STYLE_OFF end="yes" />'.
896: $$style{'/'.$token->[1]}.
897: $token->[2].
898: '<LONCAPA_INTERNAL_TURN_STYLE_ON />';
899: &Apache::lonxml::newparser($pars,\$string);
900: #&Apache::lonxml::debug("reParsing $string");
901: next;
902: }
903: if ($depth > -1) {
904: $result.=$token->[2];
905: } else {
906: $$pars[-1]->unget_token($token);
907: }
908: }
909: }
910: if (($depth >=0) && ($#$pars == 0) ) { $top_empty=1; }
911: if (($depth >=0) && ($#$pars > 0) ) {
912: pop(@$pars);
913: pop(@Apache::lonxml::pwd);
914: }
915: }
916: if ($top_empty && $depth >= 0) {
917: #never found the end tag ran out of text, throw error send back blank
918: &error('Never found end tag for <'.$tag.
919: '> current string <pre>'.
920: &HTML::Entities::encode($result).
921: '</pre>');
922: if ($gotfullstack) {
923: my $newstring='</'.$tag.'>'.$result;
924: &Apache::lonxml::newparser($pars,\$newstring);
925: }
926: $result='';
927: }
928: } else {
929: while ($#$pars > -1) {
930: while ($token = $$pars[-1]->get_token) {
931: #&Apache::lonxml::debug("s token:$token->[0]:$depth:$token->[1]");
932: if (($token->[0] eq 'T')||($token->[0] eq 'C')||
933: ($token->[0] eq 'D')) {
934: $result.=$token->[1];
935: } elsif ($token->[0] eq 'PI') {
936: $result.=$token->[2];
937: } elsif ($token->[0] eq 'S') {
938: if ( $token->[1] =~ /^$tag$/i) {
939: $$pars[-1]->unget_token($token); last;
940: } else {
941: $result.=$token->[4];
942: }
943: if ($token->[1] =~ /^LONCAPA_INTERNAL_TURN_STYLE_ON$/i) { $Apache::lonxml::usestyle=1; }
944: if ($token->[1] =~ /^LONCAPA_INTERNAL_TURN_STYLE_OFF$/i) { $Apache::lonxml::usestyle=0; }
945: } elsif ($token->[0] eq 'E') {
946: $result.=$token->[2];
947: }
948: }
949: if (($#$pars > 0) ) {
950: pop(@$pars);
951: pop(@Apache::lonxml::pwd);
952: } else { last; }
953: }
954: }
955: #&Apache::lonxml::debug("Exit:$result:");
956: return $result
957: }
958:
959: sub newparser {
960: my ($parser,$contentref,$dir) = @_;
961: push (@$parser,HTML::LCParser->new($contentref));
962: $$parser['-1']->xml_mode('1');
963: if ( $dir eq '' ) {
964: push (@Apache::lonxml::pwd, $Apache::lonxml::pwd[$#Apache::lonxml::pwd]);
965: } else {
966: push (@Apache::lonxml::pwd, $dir);
967: }
968: }
969:
970: sub parstring {
971: my ($token) = @_;
972: my $temp='';
973: foreach (@{$token->[3]}) {
974: unless ($_=~/\W/) {
975: my $val=$token->[2]->{$_};
976: $val =~ s/([\%\@\\\"\'])/\\$1/g;
977: #if ($val =~ m/^[\%\@]/) { $val="\\".$val; }
978: $temp .= "my \$$_=\"$val\";";
979: }
980: }
981: return $temp;
982: }
983:
984: sub writeallows {
985: unless ($#extlinks>=0) { return; }
986: my $thisurl='/res/'.&Apache::lonnet::declutter(shift);
987: if ($ENV{'httpref.'.$thisurl}) {
988: $thisurl=$ENV{'httpref.'.$thisurl};
989: }
990: my $thisdir=$thisurl;
991: $thisdir=~s/\/[^\/]+$//;
992: my %httpref=();
993: foreach (@extlinks) {
994: $httpref{'httpref.'.
995: &Apache::lonnet::hreflocation($thisdir,$_)}=$thisurl;
996: }
997: @extlinks=();
998: &Apache::lonnet::appenv(%httpref);
999: }
1000:
1001: #
1002: # Afterburner handles anchors, highlights and links
1003: #
1004: sub afterburn {
1005: my $result=shift;
1006: &Apache::loncommon::get_unprocessed_cgi($ENV{'QUERY_STRING'},
1007: ['highlight','anchor','link']);
1008: if ($ENV{'form.highlight'}) {
1009: foreach (split(/\,/,$ENV{'form.highlight'})) {
1010: my $anchorname=$_;
1011: my $matchthis=$anchorname;
1012: $matchthis=~s/\_+/\\s\+/g;
1013: $result=~s/($matchthis)/\<font color=\"red\"\>$1\<\/font\>/gs;
1014: }
1015: }
1016: if ($ENV{'form.link'}) {
1017: foreach (split(/\,/,$ENV{'form.link'})) {
1018: my ($anchorname,$linkurl)=split(/\>/,$_);
1019: my $matchthis=$anchorname;
1020: $matchthis=~s/\_+/\\s\+/g;
1021: $result=~s/($matchthis)/\<a href=\"$linkurl\"\>$1\<\/a\>/gs;
1022: }
1023: }
1024: if ($ENV{'form.anchor'}) {
1025: my $anchorname=$ENV{'form.anchor'};
1026: my $matchthis=$anchorname;
1027: $matchthis=~s/\_+/\\s\+/g;
1028: $result=~s/($matchthis)/\<a name=\"$anchorname\"\>$1\<\/a\>/s;
1029: $result.=(<<"ENDSCRIPT");
1030: <script type="text/javascript">
1031: document.location.hash='$anchorname';
1032: </script>
1033: ENDSCRIPT
1034: }
1035: return $result;
1036: }
1037:
1038: sub storefile {
1039: my ($file,$contents)=@_;
1040: if (my $fh=Apache::File->new('>'.$file)) {
1041: print $fh $contents;
1042: $fh->close();
1043: return 1;
1044: } else {
1045: &warning("Unable to save file $file");
1046: return 0;
1047: }
1048: }
1049:
1050: sub createnewhtml {
1051: my $filecontents=(<<SIMPLECONTENT);
1052: <html>
1053: <head>
1054: <title>
1055: Title of Document Goes Here
1056: </title>
1057: </head>
1058: <body bgcolor="#FFFFFF">
1059:
1060: Body of Document Goes Here
1061:
1062: </body>
1063: </html>
1064: SIMPLECONTENT
1065: return $filecontents;
1066: }
1067:
1068: sub createnewsty {
1069: my $filecontents=(<<SIMPLECONTENT);
1070: <definetag name="">
1071: <render>
1072: <web></web>
1073: <tex></tex>
1074: </render>
1075: </definetag>
1076: SIMPLECONTENT
1077: return $filecontents;
1078: }
1079:
1080:
1081: sub inserteditinfo {
1082: my ($result,$filecontents,$filetype)=@_;
1083: $filecontents = &HTML::Entities::encode($filecontents);
1084: # my $editheader='<a href="#editsection">Edit below</a><hr />';
1085: my $xml_help = '';
1086: if ($filetype eq 'html') {
1087: $xml_help=Apache::loncommon::helpLatexCheatsheet();
1088: }
1089: my $cleanbut = '';
1090: if ($filetype eq 'html') {
1091: $cleanbut='<input type="submit" name="attemptclean" value="'.
1092: &mt('Save and then attempt to clean HTML').'" />';
1093: }
1094: my $titledisplay=&display_title();
1095: my %lt=&Apache::lonlocal::texthash('st' => 'Save this',
1096: 'vi' => 'View',
1097: 'ed' => 'Edit');
1098: my $buttons=(<<BUTTONS);
1099: $cleanbut
1100: <input type="submit" name="savethisfile" value="$lt{'st'}" />
1101: <input type="submit" name="viewmode" value="$lt{'vi'}" />
1102: BUTTONS
1103: my $editfooter=(<<ENDFOOTER);
1104: <hr />
1105: <a name="editsection" />
1106: <form method="post">
1107: $xml_help
1108: <input type="hidden" name="editmode" value="$lt{'ed'}" />
1109: $buttons<br />
1110: <textarea cols="80" rows="40" name="filecont">$filecontents</textarea>
1111: <br />$buttons
1112: <br />
1113: </form>
1114: $titledisplay
1115: ENDFOOTER
1116: # $result=~s/(\<body[^\>]*\>)/$1$editheader/is;
1117: $result=~s/(\<\/body\>)/$editfooter/is;
1118: return $result;
1119: }
1120:
1121: sub get_target {
1122: my $viewgrades=&Apache::lonnet::allowed('vgr',$ENV{'request.course.id'});
1123: if ( $ENV{'request.state'} eq 'published') {
1124: if ( defined($ENV{'form.grade_target'})
1125: && ($viewgrades == 'F' )) {
1126: return ($ENV{'form.grade_target'});
1127: } elsif (defined($ENV{'form.grade_target'})) {
1128: if (($ENV{'form.grade_target'} eq 'web') ||
1129: ($ENV{'form.grade_target'} eq 'tex') ) {
1130: return $ENV{'form.grade_target'}
1131: } else {
1132: return 'web';
1133: }
1134: } else {
1135: return 'web';
1136: }
1137: } elsif ($ENV{'request.state'} eq 'construct') {
1138: if ( defined($ENV{'form.grade_target'})) {
1139: return ($ENV{'form.grade_target'});
1140: } else {
1141: return 'web';
1142: }
1143: } else {
1144: return 'web';
1145: }
1146: }
1147:
1148: sub handler {
1149: my $request=shift;
1150:
1151: my $target=&get_target();
1152:
1153: $Apache::lonxml::debug=$ENV{'user.debug'};
1154:
1155: if ($ENV{'browser.mathml'}) {
1156: &Apache::loncommon::content_type($request,'text/xml');
1157: } else {
1158: &Apache::loncommon::content_type($request,'text/html');
1159: }
1160: &Apache::loncommon::no_cache($request);
1161: $request->send_http_header;
1162:
1163: return OK if $request->header_only;
1164:
1165:
1166: my $file=&Apache::lonnet::filelocation("",$request->uri);
1167: my $filetype;
1168: if ($file =~ /\.sty$/) {
1169: $filetype='sty';
1170: } else {
1171: $filetype='html';
1172: }
1173: #
1174: # Edit action? Save file.
1175: #
1176: unless ($ENV{'request.state'} eq 'published') {
1177: if (($ENV{'form.savethisfile'}) || ($ENV{'form.attemptclean'})) {
1178: if (&storefile($file,$ENV{'form.filecont'})) {
1179: $request->print("<font COLOR=\"#0000FF\">Updated: ". strftime("%d %b %H:%M:%S",localtime())." </font>");
1180: }
1181: }
1182: }
1183: my %mystyle;
1184: my $result = '';
1185: my $filecontents=&Apache::lonnet::getfile($file);
1186: if ($filecontents eq -1) {
1187: $result=(<<ENDNOTFOUND);
1188: <html>
1189: <head>
1190: <title>File not found</title>
1191: </head>
1192: <body bgcolor="#FFFFFF">
1193: <b>File not found: $file</b>
1194: </body>
1195: </html>
1196: ENDNOTFOUND
1197: $filecontents='';
1198: if ($ENV{'request.state'} ne 'published') {
1199: if ($filetype eq 'sty') {
1200: $filecontents=&createnewsty();
1201: } else {
1202: $filecontents=&createnewhtml();
1203: }
1204: $ENV{'form.editmode'}='Edit'; #force edit mode
1205: }
1206: } else {
1207: unless ($ENV{'request.state'} eq 'published') {
1208: if ($ENV{'form.attemptclean'}) {
1209: $filecontents=&htmlclean($filecontents,1);
1210: }
1211: #
1212: # we are in construction space, see if edit mode forced
1213: &Apache::loncommon::get_unprocessed_cgi
1214: ($ENV{'QUERY_STRING'},['editmode']);
1215: }
1216: if (!$ENV{'form.editmode'} || $ENV{'form.viewmode'}) {
1217: $result = &Apache::lonxml::xmlparse($request,$target,$filecontents,
1218: '',%mystyle);
1219: }
1220: }
1221:
1222: #
1223: # Edit action? Insert editing commands
1224: #
1225: unless ($ENV{'request.state'} eq 'published') {
1226: if ($ENV{'form.editmode'} && (!($ENV{'form.viewmode'}))) {
1227: my $displayfile=$request->uri;
1228: $displayfile=~s/^\/[^\/]*//;
1229: $result='<html><body bgcolor="#FFFFFF"><h3>'.$displayfile.
1230: '</h3></body></html>';
1231: $result=&inserteditinfo($result,$filecontents,$filetype);
1232: }
1233: }
1234: if ($filetype eq 'html') { writeallows($request->uri); }
1235:
1236:
1237:
1238: $request->print($result);
1239:
1240: return OK;
1241: }
1242:
1243: sub display_title {
1244: my $result;
1245: if ($ENV{'request.state'} eq 'construct') {
1246: my $title=&Apache::lonnet::gettitle();
1247: if (!defined($title) || $title eq '') {
1248: $title = $ENV{'request.filename'};
1249: $title = substr($title, rindex($title, '/') + 1);
1250: }
1251: $result = "<script type='text/javascript'>top.document.title = '$title - LON-CAPA Construction Space';</script>";
1252: }
1253: return $result;
1254: }
1255:
1256: sub debug {
1257: if ($Apache::lonxml::debug eq 1) {
1258: $|=1;
1259: print('<font size="-2"<pre>DEBUG:'.&HTML::Entities::encode($_[0])."</pre></font>\n");
1260: }
1261: }
1262:
1263: sub error {
1264: $errorcount++;
1265: if (($Apache::lonxml::debug eq 1) || ($ENV{'request.state'} eq 'construct') ) {
1266: # If printing in construction space, put the error inside <pre></pre>
1267: print "<b>ERROR:</b>".join("\n",@_)."\n";
1268: } else {
1269: print "<b>An Error occured while processing this resource. The instructor has been notified.</b> <br />";
1270: #notify author
1271: &Apache::lonmsg::author_res_msg($ENV{'request.filename'},join('<br />',@_));
1272: #notify course
1273: if ( $ENV{'request.course.id'} ) {
1274: my (undef,%users)=&Apache::lonfeedback::decide_receiver(undef,0,1,1,1);
1275: my $declutter=&Apache::lonnet::declutter($ENV{'request.filename'});
1276: foreach (keys %users) {
1277: my ($user,$domain) = split(/:/, $_);
1278: &Apache::lonmsg::user_normal_msg($user,$domain,
1279: "Error [$declutter]",join('<br />',@_));
1280: }
1281: }
1282:
1283: #FIXME probably shouldn't have me get everything forever.
1284: &Apache::lonmsg::user_normal_msg('albertel','msu',"Error in $ENV{'request.filename'}",join('<br />',@_));
1285: #&Apache::lonmsg::user_normal_msg('albertel','103',"Error in $ENV{'request.filename'}",$_[0]);
1286: }
1287: }
1288:
1289: sub warning {
1290: $warningcount++;
1291:
1292: if ($ENV{'form.grade_target'} ne 'tex') {
1293: if ($ENV{'request.state'} eq 'construct' || $Apache::lonxml::debug) {
1294: print "<b>W</b>ARNING<b>:</b>".join('<br />',@_)."<br />\n";
1295: }
1296: }
1297: }
1298:
1299: sub get_param {
1300: my ($param,$parstack,$safeeval,$context,$case_insensitive) = @_;
1301: if ( ! $context ) { $context = -1; }
1302: my $args ='';
1303: if ( $#$parstack > (-2-$context) ) { $args=$$parstack[$context]; }
1304: if ( ! $args ) { return undef; }
1305: if ( $case_insensitive ) {
1306: if ($args =~ s/(my \$)(\Q$param\E)(=\")/$1.lc($2).$3/ei) {
1307: return &Apache::run::run("{$args;".'return $'.$param.'}',
1308: $safeeval); #'
1309: } else {
1310: return undef;
1311: }
1312: } else {
1313: if ( $args =~ /my \$\Q$param\E=\"/ ) {
1314: return &Apache::run::run("{$args;".'return $'.$param.'}',
1315: $safeeval); #'
1316: } else {
1317: return undef;
1318: }
1319: }
1320: }
1321:
1322: sub get_param_var {
1323: my ($param,$parstack,$safeeval,$context,$case_insensitive) = @_;
1324: if ( ! $context ) { $context = -1; }
1325: my $args ='';
1326: if ( $#$parstack > (-2-$context) ) { $args=$$parstack[$context]; }
1327: &Apache::lonxml::debug("Args are $args param is $param");
1328: if ($case_insensitive) {
1329: if (! ($args=~s/(my \$)(\Q$param\E)(=\")/$1.lc($2).$3/ei)) {
1330: return undef;
1331: }
1332: } elsif ( $args !~ /my \$\Q$param\E=\"/ ) { return undef; }
1333: my $value=&Apache::run::run("{$args;".'return $'.$param.'}',$safeeval); #'
1334: &Apache::lonxml::debug("first run is $value");
1335: if ($value =~ /^[\$\@\%]\w+$/) {
1336: &Apache::lonxml::debug("doing second");
1337: my @result=&Apache::run::run("return $value",$safeeval,1);
1338: if (!defined($result[0])) {
1339: return $value
1340: } else {
1341: if (wantarray) { return @result; } else { return $result[0]; }
1342: }
1343: } else {
1344: return $value;
1345: }
1346: }
1347:
1348: sub register_insert {
1349: my @data = split /\n/, &Apache::lonnet::getfile('/home/httpd/lonTabs/insertlist.tab');
1350: my $i;
1351: my $tagnum=0;
1352: my @order;
1353: for ($i=0;$i < $#data; $i++) {
1354: my $line = $data[$i];
1355: if ( $line =~ /^\#/ || $line =~ /^\s*\n/) { next; }
1356: if ( $line =~ /TABLE/ ) { last; }
1357: my ($tag,$descrip,$color,$function,$show,$helpfile,$helpdesc) = split(/,/, $line);
1358: if ($tag) {
1359: $insertlist{"$tagnum.tag"} = $tag;
1360: $insertlist{"$tagnum.description"} = $descrip;
1361: $insertlist{"$tagnum.color"} = $color;
1362: $insertlist{"$tagnum.function"} = $function;
1363: if (!defined($show)) { $show='yes'; }
1364: $insertlist{"$tagnum.show"}= $show;
1365: $insertlist{"$tagnum.helpfile"} = $helpfile;
1366: $insertlist{"$tagnum.helpdesc"} = $helpdesc;
1367: $insertlist{"$tag.num"}=$tagnum;
1368: $tagnum++;
1369: }
1370: }
1371: $i++; #skipping TABLE line
1372: $tagnum = 0;
1373: for (;$i < $#data;$i++) {
1374: my $line = $data[$i];
1375: my ($mnemonic,@which) = split(/ +/,$line);
1376: my $tag = $insertlist{"$tagnum.tag"};
1377: for (my $j=0;$j <=$#which;$j++) {
1378: if ( $which[$j] eq 'Y' ) {
1379: if ($insertlist{"$j.show"} ne 'no') {
1380: push(@{ $insertlist{"$tag.which"} },$j);
1381: }
1382: }
1383: }
1384: $tagnum++;
1385: }
1386: }
1387:
1388: sub description {
1389: my ($token)=@_;
1390: my $tagnum;
1391: my $tag=$token->[1];
1392: foreach my $namespace (reverse @Apache::lonxml::namespace) {
1393: my $testtag=$namespace.'::'.$tag;
1394: $tagnum=$insertlist{"$testtag.num"};
1395: if (defined($tagnum)) { last; }
1396: }
1397: if (!defined ($tagnum)) { $tagnum=$Apache::lonxml::insertlist{"$tag.num"}; }
1398: return $insertlist{$tagnum.'.description'};
1399: }
1400:
1401: # Returns a list containing the help file, and the description
1402: sub helpinfo {
1403: my ($token)=@_;
1404: my $tagnum;
1405: my $tag=$token->[1];
1406: foreach my $namespace (reverse @Apache::lonxml::namespace) {
1407: my $testtag=$namespace.'::'.$tag;
1408: $tagnum=$insertlist{"$testtag.num"};
1409: if (defined($tagnum)) { last; }
1410: }
1411: if (!defined ($tagnum)) { $tagnum=$Apache::lonxml::insertlist{"$tag.num"}; }
1412: return ($insertlist{$tagnum.'.helpfile'}, $insertlist{$tagnum.'.helpdesc'});
1413: }
1414:
1415: # ----------------------------------------------------------------- whichuser
1416: # returns a list of $symb, $courseid, $domain, $name that is correct for
1417: # calls to lonnet functions for this setup.
1418: # - looks for form.grade_ parameters
1419: sub whichuser {
1420: my ($passedsymb)=@_;
1421: my ($symb,$courseid,$domain,$name,$publicuser);
1422: if (defined($ENV{'form.grade_symb'})) {
1423: my $tmp_courseid=$ENV{'form.grade_courseid'};
1424: my $allowed=&Apache::lonnet::allowed('vgr',$tmp_courseid);
1425: if ($allowed) {
1426: $symb=$ENV{'form.grade_symb'};
1427: $courseid=$ENV{'form.grade_courseid'};
1428: $domain=$ENV{'form.grade_domain'};
1429: $name=$ENV{'form.grade_username'};
1430: }
1431: } else {
1432: if (!$passedsymb) {
1433: $symb=&Apache::lonnet::symbread();
1434: } else {
1435: $symb=$passedsymb;
1436: }
1437: $courseid=$ENV{'request.course.id'};
1438: $domain=$ENV{'user.domain'};
1439: $name=$ENV{'user.name'};
1440: if ($name eq 'public' && $domain eq 'public') {
1441: if (!defined($ENV{'form.username'})) {
1442: $ENV{'form.username'}.=time.rand(10000000);
1443: }
1444: $name.=$ENV{'form.username'};
1445: }
1446: }
1447: return ($symb,$courseid,$domain,$name,$publicuser);
1448: }
1449:
1450: 1;
1451: __END__
1452:
1453:
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