1: # The LearningOnline Network with CAPA
2: # XML Parser Module
3: #
4: # $Id: lonxml.pm,v 1.277 2003/09/15 13:38:19 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: return &Apache::lonfeedback::list_discussion().'</html>';
179: }
180:
181: sub tokeninputfield {
182: my $defhost=$Apache::lonnet::perlvar{'lonHostID'};
183: $defhost=~tr/a-z/A-Z/;
184: return (<<ENDINPUTFIELD)
185: <script type="text/javascript">
186: function updatetoken() {
187: var comp=new Array;
188: var barcode=unescape(document.tokeninput.barcode.value);
189: comp=barcode.split('*');
190: if (typeof(comp[0])!="undefined") {
191: document.tokeninput.codeone.value=comp[0];
192: }
193: if (typeof(comp[1])!="undefined") {
194: document.tokeninput.codetwo.value=comp[1];
195: }
196: if (typeof(comp[2])!="undefined") {
197: comp[2]=comp[2].toUpperCase();
198: document.tokeninput.codethree.value=comp[2];
199: }
200: document.tokeninput.barcode.value='';
201: }
202: </script>
203: <form method="post" name="tokeninput">
204: <table border="2" bgcolor="#FFFFBB">
205: <tr><th>DocID Checkin</th></tr>
206: <tr><td>
207: <table>
208: <tr>
209: <td>Scan in Barcode</td>
210: <td><input type="text" size="22" name="barcode"
211: onChange="updatetoken()"/></td>
212: </tr>
213: <tr><td><i>or</i> Type in DocID</td>
214: <td>
215: <input type="text" size="5" name="codeone" />
216: <b><font size="+2">*</font></b>
217: <input type="text" size="5" name="codetwo" />
218: <b><font size="+2">*</font></b>
219: <input type="text" size="10" name="codethree" value="$defhost"
220: onChange="this.value=this.value.toUpperCase()" />
221: </td></tr>
222: </table>
223: </td></tr>
224: <tr><td><input type="submit" value="Check in DocID" /></td></tr>
225: </table>
226: </form>
227: ENDINPUTFIELD
228: }
229:
230: sub maketoken {
231: my ($symb,$tuname,$tudom,$tcrsid)=@_;
232: unless ($symb) {
233: $symb=&Apache::lonnet::symbread();
234: }
235: unless ($tuname) {
236: $tuname=$ENV{'user.name'};
237: $tudom=$ENV{'user.domain'};
238: $tcrsid=$ENV{'request.course.id'};
239: }
240:
241: return &Apache::lonnet::checkout($symb,$tuname,$tudom,$tcrsid);
242: }
243:
244: sub printtokenheader {
245: my ($target,$token,$tsymb,$tcrsid,$tudom,$tuname)=@_;
246: unless ($token) { return ''; }
247:
248: my ($symb,$courseid,$domain,$name) = &Apache::lonxml::whichuser();
249: unless ($tsymb) {
250: $tsymb=$symb;
251: }
252: unless ($tuname) {
253: $tuname=$name;
254: $tudom=$domain;
255: $tcrsid=$courseid;
256: }
257:
258: my %reply=&Apache::lonnet::get('environment',
259: ['firstname','middlename','lastname','generation'],
260: $tudom,$tuname);
261: my $plainname=$reply{'firstname'}.' '.
262: $reply{'middlename'}.' '.
263: $reply{'lastname'}.' '.
264: $reply{'generation'};
265:
266: if ($target eq 'web') {
267: my %idhash=&Apache::lonnet::idrget($tudom,($tuname));
268: return
269: '<img align="right" src="/cgi-bin/barcode.png?encode='.$token.'" />'.
270: 'Checked out for '.$plainname.
271: '<br />User: '.$tuname.' at '.$tudom.
272: '<br />ID: '.$idhash{$tuname}.
273: '<br />CourseID: '.$tcrsid.
274: '<br />Course: '.$ENV{'course.'.$tcrsid.'.description'}.
275: '<br />DocID: '.$token.
276: '<br />Time: '.localtime().'<hr />';
277: } else {
278: return $token;
279: }
280: }
281:
282: sub fontsettings() {
283: my $headerstring='';
284: if (($ENV{'browser.os'} eq 'mac') && (!$ENV{'browser.mathml'})) {
285: $headerstring.=
286: '<meta Content-Type="text/html; charset=x-mac-roman">';
287: } elsif (!$ENV{'browser.mathml'} && $ENV{'browser.unicode'}) {
288: $headerstring.=
289: '<meta http-equiv="Content-Type" content="text/html; charset=utf-8" />';
290: }
291: return $headerstring;
292: }
293:
294: sub printalltags {
295: my $temp;
296: foreach $temp (sort keys %Apache::lonxml::alltags) {
297: &Apache::lonxml::debug("$temp -- ".
298: join(',',@{ $Apache::lonxml::alltags{$temp} }));
299: }
300: }
301:
302: sub xmlparse {
303: my ($request,$target,$content_file_string,$safeinit,%style_for_target) = @_;
304:
305: &setup_globals($request,$target);
306: &Apache::inputtags::initialize_inputtags();
307: &Apache::outputtags::initialize_outputtags();
308: &Apache::edit::initialize_edit();
309:
310: #
311: # do we have a course style file?
312: #
313:
314: if ($ENV{'request.course.id'} && $ENV{'request.state'} ne 'construct') {
315: my $bodytext=
316: $ENV{'course.'.$ENV{'request.course.id'}.'.default_xml_style'};
317: if ($bodytext) {
318: my $location=&Apache::lonnet::filelocation('',$bodytext);
319: my $styletext=&Apache::lonnet::getfile($location);
320: if ($styletext ne '-1') {
321: %style_for_target = (%style_for_target,
322: &Apache::style::styleparser($target,$styletext));
323: }
324: }
325: }
326: #&printalltags();
327: my @pars = ();
328: my $pwd=$ENV{'request.filename'};
329: $pwd =~ s:/[^/]*$::;
330: &newparser(\@pars,\$content_file_string,$pwd);
331:
332: my $safeeval = new Safe;
333: my $safehole = new Safe::Hole;
334: &init_safespace($target,$safeeval,$safehole,$safeinit);
335: #-------------------- Redefinition of the target in the case of compound target
336:
337: ($target, my @tenta) = split('&&',$target);
338:
339: my @stack = ();
340: my @parstack = ();
341: &initdepth;
342:
343: my $finaloutput = &inner_xmlparse($target,\@stack,\@parstack,\@pars,
344: $safeeval,\%style_for_target);
345:
346: if ($ENV{'request.uri'}) {
347: &writeallows($ENV{'request.uri'});
348: }
349: if ($Apache::lonxml::counter_changed) { &store_counter() }
350: return $finaloutput;
351: }
352:
353: sub htmlclean {
354: my ($raw,$full)=@_;
355:
356: my $tree = HTML::TreeBuilder->new;
357: $tree->ignore_unknown(0);
358:
359: $tree->parse($raw);
360:
361: my $output= $tree->as_HTML(undef,' ');
362:
363: $output=~s/\<(br|hr|img|meta|allow)(.*?)\>/\<$1$2 \/\>/gis;
364: $output=~s/\<\/(br|hr|img|meta|allow)\>//gis;
365: unless ($full) {
366: $output=~s/\<[\/]*(body|head|html)\>//gis;
367: }
368:
369: $tree = $tree->delete;
370:
371: return $output;
372: }
373:
374: sub latex_special_symbols {
375: my ($string,$where)=@_;
376: if ($where eq 'header') {
377: $string =~ s/(\\|_|\^)/ /g;
378: $string =~ s/(\$|%|\#|&|\{|\})/\\$1/g;
379: $string =~ s/_/ /g;
380: } else {
381: $string=~s/\\ /\\char92 /g;
382: $string=~s/\^/\\char94 /g;
383: $string=~s/\~/\\char126 /g;
384: $string=~s/(&[^A-Za-z\#])/\\$1/g;
385: $string=~s/([^&])\#/$1\\#/g;
386: $string=~s/(\$|_|{|})/\\$1/g;
387: $string=~s/\\char92 /\\texttt{\\char92}/g;
388: $string=~s/(>|<)/\$$1\$/g; #more or less
389: if ($string=~m/\d%/) {$string =~ s/(\d)%/$1\\%/g;} #percent after digit
390: if ($string=~m/\s%/) {$string =~ s/(\s)%/$1\\%/g;} #percent after space
391: if ($string eq '%.') {$string = '\%.';} #percent at the end of statement
392: }
393: return $string;
394: }
395:
396: sub inner_xmlparse {
397: my ($target,$stack,$parstack,$pars,$safeeval,$style_for_target)=@_;
398: my $finaloutput = '';
399: my $result;
400: my $token;
401: my $dontpop=0;
402: while ( $#$pars > -1 ) {
403: while ($token = $$pars['-1']->get_token) {
404: if (($token->[0] eq 'T') || ($token->[0] eq 'C') ) {
405: if ($metamode<1) {
406: my $text=$token->[1];
407: if ($token->[0] eq 'C' && $target eq 'tex') {
408: $text = '';
409: # $text = '%'.$text."\n";
410: }
411: $result.=$text;
412: }
413: } elsif (($token->[0] eq 'D')) {
414: if ($metamode<1 && $target eq 'web') {
415: my $text=$token->[1];
416: $result.=$text;
417: }
418: } elsif ($token->[0] eq 'PI') {
419: if ($metamode<1 && $target eq 'web') {
420: $result=$token->[2];
421: }
422: } elsif ($token->[0] eq 'S') {
423: # add tag to stack
424: push (@$stack,$token->[1]);
425: # add parameters list to another stack
426: push (@$parstack,&parstring($token));
427: &increasedepth($token);
428: if ($Apache::lonxml::usestyle &&
429: exists($$style_for_target{$token->[1]})) {
430: $Apache::lonxml::usestyle=0;
431: my $string=$$style_for_target{$token->[1]}.
432: '<LONCAPA_INTERNAL_TURN_STYLE_ON />';
433: &Apache::lonxml::newparser($pars,\$string);
434: $Apache::lonxml::style_values=$$parstack[-1];
435: $Apache::lonxml::style_end_values=$$parstack[-1];
436: } else {
437: $result = &callsub("start_$token->[1]", $target, $token, $stack,
438: $parstack, $pars, $safeeval, $style_for_target);
439: }
440: } elsif ($token->[0] eq 'E') {
441: if ($Apache::lonxml::usestyle &&
442: exists($$style_for_target{'/'."$token->[1]"})) {
443: $Apache::lonxml::usestyle=0;
444: my $string=$$style_for_target{'/'.$token->[1]}.
445: '<LONCAPA_INTERNAL_TURN_STYLE_ON end="'.$token->[1].'" />';
446: &Apache::lonxml::newparser($pars,\$string);
447: $Apache::lonxml::style_values=$Apache::lonxml::style_end_values;
448: $Apache::lonxml::style_end_values='';
449: $dontpop=1;
450: } else {
451: #clear out any tags that didn't end
452: while ($token->[1] ne $$stack['-1'] && ($#$stack > -1)) {
453: my $lasttag=$$stack[-1];
454: if ($token->[1] =~ /^$lasttag$/i) {
455: &Apache::lonxml::warning('Using tag </'.$token->[1].'> on line '.$token->[3].' as end tag to <'.$$stack[-1].'>');
456: last;
457: } else {
458: &Apache::lonxml::warning('Found tag </'.$token->[1].'> on line '.$token->[3].' when looking for </'.$$stack[-1].'> in file');
459: &end_tag($stack,$parstack,$token);
460: }
461: }
462: $result = &callsub("end_$token->[1]", $target, $token, $stack,
463: $parstack, $pars,$safeeval, $style_for_target);
464: }
465: } else {
466: &Apache::lonxml::error("Unknown token event :$token->[0]:$token->[1]:");
467: }
468: #evaluate variable refs in result
469: if ($result ne "") {
470: my $extras;
471: if (!$Apache::lonxml::usestyle) {
472: $extras=$Apache::lonxml::style_values;
473: }
474: if ( $#$parstack > -1 ) {
475: $result=&Apache::run::evaluate($result,$safeeval,$extras.$$parstack[-1]);
476: } else {
477: $result= &Apache::run::evaluate($result,$safeeval,$extras);
478: }
479: }
480: if (($token->[0] eq 'T') || ($token->[0] eq 'C') || ($token->[0] eq 'D') ) {
481: #Style file definitions should be correct
482: if ($target eq 'tex' && ($Apache::lonxml::usestyle)) {
483: $result=&latex_special_symbols($result);
484: }
485: }
486:
487: # Encode any high ASCII characters
488: if (!$Apache::lonxml::prevent_entity_encode) {
489: $result=&HTML::Entities::encode($result,"\200-\377");
490: }
491: if ($Apache::lonxml::redirection) {
492: $Apache::lonxml::outputstack['-1'] .= $result;
493: } else {
494: $finaloutput.=$result;
495: }
496: $result = '';
497:
498: if ($token->[0] eq 'E' && !$dontpop) {
499: &end_tag($stack,$parstack,$token);
500: }
501: $dontpop=0;
502: }
503: if ($#$pars > -1) {
504: pop @$pars;
505: pop @Apache::lonxml::pwd;
506: }
507: }
508:
509: # if ($target eq 'meta') {
510: # $finaloutput.=&endredirection;
511: # }
512:
513:
514: if (($ENV{'QUERY_STRING'}) && ($target eq 'web')) {
515: $finaloutput=&afterburn($finaloutput);
516: }
517: return $finaloutput;
518: }
519:
520: sub callsub {
521: my ($sub,$target,$token,$tagstack,$parstack,$parser,$safeeval,$style)=@_;
522: my $currentstring='';
523: my $nodefault;
524: {
525: my $sub1;
526: no strict 'refs';
527: my $tag=$token->[1];
528: # get utterly rid of extended html tags
529: if ($tag=~/^x\-/i) { return ''; }
530: my $space=$Apache::lonxml::alltags{$tag}[-1];
531: if (!$space) {
532: $tag=~tr/A-Z/a-z/;
533: $sub=~tr/A-Z/a-z/;
534: $space=$Apache::lonxml::alltags{$tag}[-1]
535: }
536:
537: my $deleted=0;
538: $Apache::lonxml::curdepth=join('_',@Apache::lonxml::depthcounter);
539: if (($token->[0] eq 'S') && ($target eq 'modified')) {
540: $deleted=&Apache::edit::handle_delete($space,$target,$token,$tagstack,
541: $parstack,$parser,$safeeval,
542: $style);
543: }
544: if (!$deleted) {
545: if ($space) {
546: #&Apache::lonxml::debug("Calling sub $sub in $space $metamode");
547: $sub1="$space\:\:$sub";
548: ($currentstring,$nodefault) = &$sub1($target,$token,$tagstack,
549: $parstack,$parser,$safeeval,
550: $style);
551: } else {
552: #&Apache::lonxml::debug("NOT Calling sub $sub in $space $metamode");
553: if ($metamode <1) {
554: if (defined($token->[4]) && ($metamode < 1)) {
555: $currentstring = $token->[4];
556: } else {
557: $currentstring = $token->[2];
558: }
559: }
560: }
561: # &Apache::lonxml::debug("nodefalt:$nodefault:");
562: if ($currentstring eq '' && $nodefault eq '') {
563: if ($target eq 'edit') {
564: #&Apache::lonxml::debug("doing default edit for $token->[1]");
565: if ($token->[0] eq 'S') {
566: $currentstring = &Apache::edit::tag_start($target,$token);
567: } elsif ($token->[0] eq 'E') {
568: $currentstring = &Apache::edit::tag_end($target,$token);
569: }
570: } elsif ($target eq 'modified') {
571: if ($token->[0] eq 'S') {
572: $currentstring = $token->[4];
573: $currentstring.=&Apache::edit::handle_insert();
574: } elsif ($token->[0] eq 'E') {
575: $currentstring = $token->[2];
576: $currentstring.=&Apache::edit::handle_insertafter($token->[1]);
577: } else {
578: $currentstring = $token->[2];
579: }
580: }
581: }
582: }
583: use strict 'refs';
584: }
585: return $currentstring;
586: }
587:
588: sub setup_globals {
589: my ($request,$target)=@_;
590: $Apache::lonxml::request=$request;
591: $Apache::lonxml::registered = 0;
592: $errorcount=0;
593: $warningcount=0;
594: $Apache::lonxml::default_homework_loaded=0;
595: $Apache::lonxml::usestyle=1;
596: &init_counter();
597: @Apache::lonxml::pwd=();
598: @Apache::lonxml::extlinks=();
599: if ($target eq 'meta') {
600: $Apache::lonxml::redirection = 0;
601: $Apache::lonxml::metamode = 1;
602: $Apache::lonxml::evaluate = 1;
603: $Apache::lonxml::import = 0;
604: } elsif ($target eq 'answer') {
605: $Apache::lonxml::redirection = 0;
606: $Apache::lonxml::metamode = 1;
607: $Apache::lonxml::evaluate = 1;
608: $Apache::lonxml::import = 1;
609: } elsif ($target eq 'grade') {
610: &startredirection;
611: $Apache::lonxml::metamode = 0;
612: $Apache::lonxml::evaluate = 1;
613: $Apache::lonxml::import = 1;
614: } elsif ($target eq 'modified') {
615: $Apache::lonxml::redirection = 0;
616: $Apache::lonxml::metamode = 0;
617: $Apache::lonxml::evaluate = 0;
618: $Apache::lonxml::import = 0;
619: } elsif ($target eq 'edit') {
620: $Apache::lonxml::redirection = 0;
621: $Apache::lonxml::metamode = 0;
622: $Apache::lonxml::evaluate = 0;
623: $Apache::lonxml::import = 0;
624: } elsif ($target eq 'analyze') {
625: $Apache::lonxml::redirection = 0;
626: $Apache::lonxml::metamode = 0;
627: $Apache::lonxml::evaluate = 1;
628: $Apache::lonxml::import = 1;
629: } else {
630: $Apache::lonxml::redirection = 0;
631: $Apache::lonxml::metamode = 0;
632: $Apache::lonxml::evaluate = 1;
633: $Apache::lonxml::import = 1;
634: }
635: }
636:
637: sub init_safespace {
638: my ($target,$safeeval,$safehole,$safeinit) = @_;
639: $safeeval->permit("entereval");
640: $safeeval->permit(":base_math");
641: $safeeval->permit("sort");
642: $safeeval->deny(":base_io");
643: $safehole->wrap(\&Apache::scripttag::xmlparse,$safeeval,'&xmlparse');
644: $safehole->wrap(\&Apache::outputtags::multipart,$safeeval,'&multipart');
645: $safehole->wrap(\&Apache::lonnet::EXT,$safeeval,'&EXT');
646:
647: $safehole->wrap(\&Math::Cephes::asin,$safeeval,'&asin');
648: $safehole->wrap(\&Math::Cephes::acos,$safeeval,'&acos');
649: $safehole->wrap(\&Math::Cephes::atan,$safeeval,'&atan');
650: $safehole->wrap(\&Math::Cephes::sinh,$safeeval,'&sinh');
651: $safehole->wrap(\&Math::Cephes::cosh,$safeeval,'&cosh');
652: $safehole->wrap(\&Math::Cephes::tanh,$safeeval,'&tanh');
653: $safehole->wrap(\&Math::Cephes::asinh,$safeeval,'&asinh');
654: $safehole->wrap(\&Math::Cephes::acosh,$safeeval,'&acosh');
655: $safehole->wrap(\&Math::Cephes::atanh,$safeeval,'&atanh');
656: $safehole->wrap(\&Math::Cephes::erf,$safeeval,'&erf');
657: $safehole->wrap(\&Math::Cephes::erfc,$safeeval,'&erfc');
658: $safehole->wrap(\&Math::Cephes::j0,$safeeval,'&j0');
659: $safehole->wrap(\&Math::Cephes::j1,$safeeval,'&j1');
660: $safehole->wrap(\&Math::Cephes::jn,$safeeval,'&jn');
661: $safehole->wrap(\&Math::Cephes::jv,$safeeval,'&jv');
662: $safehole->wrap(\&Math::Cephes::y0,$safeeval,'&y0');
663: $safehole->wrap(\&Math::Cephes::y1,$safeeval,'&y1');
664: $safehole->wrap(\&Math::Cephes::yn,$safeeval,'&yn');
665: $safehole->wrap(\&Math::Cephes::yv,$safeeval,'&yv');
666:
667: $safehole->wrap(\&Math::Cephes::bdtr ,$safeeval,'&bdtr' );
668: $safehole->wrap(\&Math::Cephes::bdtrc ,$safeeval,'&bdtrc' );
669: $safehole->wrap(\&Math::Cephes::bdtri ,$safeeval,'&bdtri' );
670: $safehole->wrap(\&Math::Cephes::btdtr ,$safeeval,'&btdtr' );
671: $safehole->wrap(\&Math::Cephes::chdtr ,$safeeval,'&chdtr' );
672: $safehole->wrap(\&Math::Cephes::chdtrc,$safeeval,'&chdtrc');
673: $safehole->wrap(\&Math::Cephes::chdtri,$safeeval,'&chdtri');
674: $safehole->wrap(\&Math::Cephes::fdtr ,$safeeval,'&fdtr' );
675: $safehole->wrap(\&Math::Cephes::fdtrc ,$safeeval,'&fdtrc' );
676: $safehole->wrap(\&Math::Cephes::fdtri ,$safeeval,'&fdtri' );
677: $safehole->wrap(\&Math::Cephes::gdtr ,$safeeval,'&gdtr' );
678: $safehole->wrap(\&Math::Cephes::gdtrc ,$safeeval,'&gdtrc' );
679: $safehole->wrap(\&Math::Cephes::nbdtr ,$safeeval,'&nbdtr' );
680: $safehole->wrap(\&Math::Cephes::nbdtrc,$safeeval,'&nbdtrc');
681: $safehole->wrap(\&Math::Cephes::nbdtri,$safeeval,'&nbdtri');
682: $safehole->wrap(\&Math::Cephes::ndtr ,$safeeval,'&ndtr' );
683: $safehole->wrap(\&Math::Cephes::ndtri ,$safeeval,'&ndtri' );
684: $safehole->wrap(\&Math::Cephes::pdtr ,$safeeval,'&pdtr' );
685: $safehole->wrap(\&Math::Cephes::pdtrc ,$safeeval,'&pdtrc' );
686: $safehole->wrap(\&Math::Cephes::pdtri ,$safeeval,'&pdtri' );
687: $safehole->wrap(\&Math::Cephes::stdtr ,$safeeval,'&stdtr' );
688: $safehole->wrap(\&Math::Cephes::stdtri,$safeeval,'&stdtri');
689:
690: # $safehole->wrap(\&Math::Cephes::new_fract,$safeeval,'&new_fract');
691: # $safehole->wrap(\&Math::Cephes::radd,$safeeval,'&radd');
692: # $safehole->wrap(\&Math::Cephes::rsub,$safeeval,'&rsub');
693: # $safehole->wrap(\&Math::Cephes::rmul,$safeeval,'&rmul');
694: # $safehole->wrap(\&Math::Cephes::rdiv,$safeeval,'&rdiv');
695: # $safehole->wrap(\&Math::Cephes::euclid,$safeeval,'&euclid');
696:
697: $safehole->wrap(\&Math::Random::random_beta,$safeeval,'&math_random_beta');
698: $safehole->wrap(\&Math::Random::random_chi_square,$safeeval,'&math_random_chi_square');
699: $safehole->wrap(\&Math::Random::random_exponential,$safeeval,'&math_random_exponential');
700: $safehole->wrap(\&Math::Random::random_f,$safeeval,'&math_random_f');
701: $safehole->wrap(\&Math::Random::random_gamma,$safeeval,'&math_random_gamma');
702: $safehole->wrap(\&Math::Random::random_multivariate_normal,$safeeval,'&math_random_multivariate_normal');
703: $safehole->wrap(\&Math::Random::random_multinomial,$safeeval,'&math_random_multinomial');
704: $safehole->wrap(\&Math::Random::random_noncentral_chi_square,$safeeval,'&math_random_noncentral_chi_square');
705: $safehole->wrap(\&Math::Random::random_noncentral_f,$safeeval,'&math_random_noncentral_f');
706: $safehole->wrap(\&Math::Random::random_normal,$safeeval,'&math_random_normal');
707: $safehole->wrap(\&Math::Random::random_permutation,$safeeval,'&math_random_permutation');
708: $safehole->wrap(\&Math::Random::random_permuted_index,$safeeval,'&math_random_permuted_index');
709: $safehole->wrap(\&Math::Random::random_uniform,$safeeval,'&math_random_uniform');
710: $safehole->wrap(\&Math::Random::random_poisson,$safeeval,'&math_random_poisson');
711: $safehole->wrap(\&Math::Random::random_uniform_integer,$safeeval,'&math_random_uniform_integer');
712: $safehole->wrap(\&Math::Random::random_negative_binomial,$safeeval,'&math_random_negative_binomial');
713: $safehole->wrap(\&Math::Random::random_binomial,$safeeval,'&math_random_binomial');
714: $safehole->wrap(\&Math::Random::random_seed_from_phrase,$safeeval,'&random_seed_from_phrase');
715: $safehole->wrap(\&Math::Random::random_set_seed_from_phrase,$safeeval,'&random_set_seed_from_phrase');
716: $safehole->wrap(\&Math::Random::random_get_seed,$safeeval,'&random_get_seed');
717: $safehole->wrap(\&Math::Random::random_set_seed,$safeeval,'&random_set_seed');
718:
719: #need to inspect this class of ops
720: # $safeeval->deny(":base_orig");
721: $safeinit .= ';$external::target="'.$target.'";';
722: my $rndseed;
723: my ($symb,$courseid,$domain,$name) = &Apache::lonxml::whichuser();
724: $rndseed=&Apache::lonnet::rndseed($symb,$courseid,$domain,$name);
725: $safeinit .= ';$external::randomseed='.$rndseed.';';
726: &Apache::lonxml::debug("Setting rndseed to $rndseed");
727: &Apache::run::run($safeinit,$safeeval);
728: }
729:
730: sub default_homework_load {
731: my ($safeeval)=@_;
732: &Apache::lonxml::debug('Loading default_homework');
733: my $default=&Apache::lonnet::getfile('/home/httpd/html/res/adm/includes/default_homework.lcpm');
734: if ($default eq -1) {
735: &Apache::lonxml::error("<b>Unable to find <i>default_homework.lcpm</i></b>");
736: } else {
737: &Apache::run::run($default,$safeeval);
738: $Apache::lonxml::default_homework_loaded=1;
739: }
740: }
741:
742: sub startredirection {
743: $Apache::lonxml::redirection++;
744: push (@Apache::lonxml::outputstack, '');
745: }
746:
747: sub endredirection {
748: if (!$Apache::lonxml::redirection) {
749: &Apache::lonxml::error("Endredirection was called, before a startredirection, perhaps you have unbalanced tags. Some debuging information:".join ":",caller);
750: return '';
751: }
752: $Apache::lonxml::redirection--;
753: pop @Apache::lonxml::outputstack;
754: }
755:
756: sub end_tag {
757: my ($tagstack,$parstack,$token)=@_;
758: pop(@$tagstack);
759: pop(@$parstack);
760: &decreasedepth($token);
761: }
762:
763: sub initdepth {
764: @Apache::lonxml::depthcounter=();
765: $Apache::lonxml::depth=-1;
766: $Apache::lonxml::olddepth=-1;
767: }
768:
769: sub increasedepth {
770: my ($token) = @_;
771: $Apache::lonxml::depth++;
772: $Apache::lonxml::depthcounter[$Apache::lonxml::depth]++;
773: if ($Apache::lonxml::depthcounter[$Apache::lonxml::depth]==1) {
774: $Apache::lonxml::olddepth=$Apache::lonxml::depth;
775: }
776: my $curdepth=join('_',@Apache::lonxml::depthcounter);
777: &Apache::lonxml::debug("s $Apache::lonxml::depth : $Apache::lonxml::olddepth : $curdepth : $token->[1]\n");
778: #print "<br />s $Apache::lonxml::depth : $Apache::lonxml::olddepth : $curdepth : $token->[1]\n";
779: }
780:
781: sub decreasedepth {
782: my ($token) = @_;
783: $Apache::lonxml::depth--;
784: if ($Apache::lonxml::depth<$Apache::lonxml::olddepth-1) {
785: $#Apache::lonxml::depthcounter--;
786: $Apache::lonxml::olddepth=$Apache::lonxml::depth+1;
787: }
788: if ( $Apache::lonxml::depth < -1) {
789: &Apache::lonxml::warning("Missing tags, unable to properly run file.");
790: $Apache::lonxml::depth='-1';
791: }
792: my $curdepth=join('_',@Apache::lonxml::depthcounter);
793: &Apache::lonxml::debug("e $Apache::lonxml::depth : $Apache::lonxml::olddepth : $token->[1] : $curdepth\n");
794: #print "<br />e $Apache::lonxml::depth : $Apache::lonxml::olddepth : $token->[1] : $curdepth\n";
795: }
796:
797: sub get_all_text_unbalanced {
798: #there is a copy of this in lonpublisher.pm
799: my($tag,$pars)= @_;
800: my $token;
801: my $result='';
802: $tag='<'.$tag.'>';
803: while ($token = $$pars[-1]->get_token) {
804: if (($token->[0] eq 'T')||($token->[0] eq 'C')||($token->[0] eq 'D')) {
805: $result.=$token->[1];
806: } elsif ($token->[0] eq 'PI') {
807: $result.=$token->[2];
808: } elsif ($token->[0] eq 'S') {
809: $result.=$token->[4];
810: } elsif ($token->[0] eq 'E') {
811: $result.=$token->[2];
812: }
813: if ($result =~ /(.*)\Q$tag\E(.*)/s) {
814: &Apache::lonxml::debug('Got a winner with leftovers ::'.$2);
815: &Apache::lonxml::debug('Result is :'.$1);
816: $result=$1;
817: my $redo=$tag.$2;
818: &Apache::lonxml::newparser($pars,\$redo);
819: last;
820: }
821: }
822: return $result
823: }
824:
825: sub increment_counter {
826: my ($increment) = @_;
827: if (defined($increment) && $increment gt 0) {
828: $Apache::lonxml::counter+=$increment;
829: } else {
830: $Apache::lonxml::counter++;
831: }
832: $Apache::lonxml::counter_changed=1;
833: }
834:
835: sub init_counter {
836: if (defined($ENV{'form.counter'})) {
837: $Apache::lonxml::counter=$ENV{'form.counter'};
838: $Apache::lonxml::counter_changed=0;
839: } else {
840: $Apache::lonxml::counter=1;
841: $Apache::lonxml::counter_changed=1;
842: }
843: }
844:
845: sub store_counter {
846: &Apache::lonnet::appenv(('form.counter' => $Apache::lonxml::counter));
847: return '';
848: }
849:
850: sub get_all_text {
851: my($tag,$pars,$style)= @_;
852: &Apache::lonxml::debug("Got a ".ref($pars));
853: my $gotfullstack=1;
854: if (ref($pars) ne 'ARRAY') {
855: $gotfullstack=0;
856: $pars=[$pars];
857: }
858: &Apache::lonxml::debug("Got a ".ref($style));
859: if (ref($style) ne 'HASH') {
860: $style={};
861: } else {
862: &Apache::lonhomework::showhash(%$style);
863: }
864: my $depth=0;
865: my $token;
866: my $result='';
867: if ( $tag =~ m:^/: ) {
868: my $tag=substr($tag,1);
869: #&Apache::lonxml::debug("have:$tag:");
870: my $top_empty=0;
871: while (($depth >=0) && ($#$pars > -1) && (!$top_empty)) {
872: while (($depth >=0) && ($token = $$pars[-1]->get_token)) {
873: #&Apache::lonxml::debug("e token:$token->[0]:$depth:$token->[1]:".$#$pars.":".$#Apache::lonxml::pwd);
874: if (($token->[0] eq 'T')||($token->[0] eq 'C')||($token->[0] eq 'D')) {
875: $result.=$token->[1];
876: } elsif ($token->[0] eq 'PI') {
877: $result.=$token->[2];
878: } elsif ($token->[0] eq 'S') {
879: if ($token->[1] =~ /^$tag$/i) { $depth++; }
880: if ($token->[1] =~ /^LONCAPA_INTERNAL_TURN_STYLE_ON$/i) { $Apache::lonxml::usestyle=1; }
881: if ($token->[1] =~ /^LONCAPA_INTERNAL_TURN_STYLE_OFF$/i) { $Apache::lonxml::usestyle=0; }
882: $result.=$token->[4];
883: } elsif ($token->[0] eq 'E') {
884: if ( $token->[1] =~ /^$tag$/i) { $depth--; }
885: #skip sending back the last end tag
886: if ($depth == 0 && exists($$style{'/'.$token->[1]})) {
887: my $string=
888: '<LONCAPA_INTERNAL_TURN_STYLE_OFF end="yes" />'.
889: $$style{'/'.$token->[1]}.
890: $token->[2].
891: '<LONCAPA_INTERNAL_TURN_STYLE_ON />';
892: &Apache::lonxml::newparser($pars,\$string);
893: #&Apache::lonxml::debug("reParsing $string");
894: next;
895: }
896: if ($depth > -1) {
897: $result.=$token->[2];
898: } else {
899: $$pars[-1]->unget_token($token);
900: }
901: }
902: }
903: if (($depth >=0) && ($#$pars == 0) ) { $top_empty=1; }
904: if (($depth >=0) && ($#$pars > 0) ) {
905: pop(@$pars);
906: pop(@Apache::lonxml::pwd);
907: }
908: }
909: if ($top_empty && $depth >= 0) {
910: #never found the end tag ran out of text, throw error send back blank
911: &error('Never found end tag for <'.$tag.
912: '> current string <pre>'.
913: &HTML::Entities::encode($result).
914: '</pre>');
915: if ($gotfullstack) {
916: my $newstring='</'.$tag.'>'.$result;
917: &Apache::lonxml::newparser($pars,\$newstring);
918: }
919: $result='';
920: }
921: } else {
922: while ($#$pars > -1) {
923: while ($token = $$pars[-1]->get_token) {
924: #&Apache::lonxml::debug("s token:$token->[0]:$depth:$token->[1]");
925: if (($token->[0] eq 'T')||($token->[0] eq 'C')||
926: ($token->[0] eq 'D')) {
927: $result.=$token->[1];
928: } elsif ($token->[0] eq 'PI') {
929: $result.=$token->[2];
930: } elsif ($token->[0] eq 'S') {
931: if ( $token->[1] =~ /^$tag$/i) {
932: $$pars[-1]->unget_token($token); last;
933: } else {
934: $result.=$token->[4];
935: }
936: if ($token->[1] =~ /^LONCAPA_INTERNAL_TURN_STYLE_ON$/i) { $Apache::lonxml::usestyle=1; }
937: if ($token->[1] =~ /^LONCAPA_INTERNAL_TURN_STYLE_OFF$/i) { $Apache::lonxml::usestyle=0; }
938: } elsif ($token->[0] eq 'E') {
939: $result.=$token->[2];
940: }
941: }
942: if (($#$pars > 0) ) {
943: pop(@$pars);
944: pop(@Apache::lonxml::pwd);
945: } else { last; }
946: }
947: }
948: #&Apache::lonxml::debug("Exit:$result:");
949: return $result
950: }
951:
952: sub newparser {
953: my ($parser,$contentref,$dir) = @_;
954: push (@$parser,HTML::LCParser->new($contentref));
955: $$parser['-1']->xml_mode('1');
956: if ( $dir eq '' ) {
957: push (@Apache::lonxml::pwd, $Apache::lonxml::pwd[$#Apache::lonxml::pwd]);
958: } else {
959: push (@Apache::lonxml::pwd, $dir);
960: }
961: }
962:
963: sub parstring {
964: my ($token) = @_;
965: my $temp='';
966: foreach (@{$token->[3]}) {
967: unless ($_=~/\W/) {
968: my $val=$token->[2]->{$_};
969: $val =~ s/([\%\@\\\"\'])/\\$1/g;
970: #if ($val =~ m/^[\%\@]/) { $val="\\".$val; }
971: $temp .= "my \$$_=\"$val\";";
972: }
973: }
974: return $temp;
975: }
976:
977: sub writeallows {
978: unless ($#extlinks>=0) { return; }
979: my $thisurl='/res/'.&Apache::lonnet::declutter(shift);
980: if ($ENV{'httpref.'.$thisurl}) {
981: $thisurl=$ENV{'httpref.'.$thisurl};
982: }
983: my $thisdir=$thisurl;
984: $thisdir=~s/\/[^\/]+$//;
985: my %httpref=();
986: foreach (@extlinks) {
987: $httpref{'httpref.'.
988: &Apache::lonnet::hreflocation($thisdir,$_)}=$thisurl;
989: }
990: @extlinks=();
991: &Apache::lonnet::appenv(%httpref);
992: }
993:
994: #
995: # Afterburner handles anchors, highlights and links
996: #
997: sub afterburn {
998: my $result=shift;
999: &Apache::loncommon::get_unprocessed_cgi($ENV{'QUERY_STRING'},
1000: ['highlight','anchor','link']);
1001: if ($ENV{'form.highlight'}) {
1002: foreach (split(/\,/,$ENV{'form.highlight'})) {
1003: my $anchorname=$_;
1004: my $matchthis=$anchorname;
1005: $matchthis=~s/\_+/\\s\+/g;
1006: $result=~s/($matchthis)/\<font color=\"red\"\>$1\<\/font\>/gs;
1007: }
1008: }
1009: if ($ENV{'form.link'}) {
1010: foreach (split(/\,/,$ENV{'form.link'})) {
1011: my ($anchorname,$linkurl)=split(/\>/,$_);
1012: my $matchthis=$anchorname;
1013: $matchthis=~s/\_+/\\s\+/g;
1014: $result=~s/($matchthis)/\<a href=\"$linkurl\"\>$1\<\/a\>/gs;
1015: }
1016: }
1017: if ($ENV{'form.anchor'}) {
1018: my $anchorname=$ENV{'form.anchor'};
1019: my $matchthis=$anchorname;
1020: $matchthis=~s/\_+/\\s\+/g;
1021: $result=~s/($matchthis)/\<a name=\"$anchorname\"\>$1\<\/a\>/s;
1022: $result.=(<<"ENDSCRIPT");
1023: <script type="text/javascript">
1024: document.location.hash='$anchorname';
1025: </script>
1026: ENDSCRIPT
1027: }
1028: return $result;
1029: }
1030:
1031: sub storefile {
1032: my ($file,$contents)=@_;
1033: if (my $fh=Apache::File->new('>'.$file)) {
1034: print $fh $contents;
1035: $fh->close();
1036: return 1;
1037: } else {
1038: &warning("Unable to save file $file");
1039: return 0;
1040: }
1041: }
1042:
1043: sub createnewhtml {
1044: my $filecontents=(<<SIMPLECONTENT);
1045: <html>
1046: <head>
1047: <title>
1048: Title of Document Goes Here
1049: </title>
1050: </head>
1051: <body bgcolor="#FFFFFF">
1052:
1053: Body of Document Goes Here
1054:
1055: </body>
1056: </html>
1057: SIMPLECONTENT
1058: return $filecontents;
1059: }
1060:
1061: sub createnewsty {
1062: my $filecontents=(<<SIMPLECONTENT);
1063: <definetag name="">
1064: <render>
1065: <web></web>
1066: <tex></tex>
1067: </render>
1068: </definetag>
1069: SIMPLECONTENT
1070: return $filecontents;
1071: }
1072:
1073:
1074: sub inserteditinfo {
1075: my ($result,$filecontents,$filetype)=@_;
1076: $filecontents = &HTML::Entities::encode($filecontents);
1077: # my $editheader='<a href="#editsection">Edit below</a><hr />';
1078: my $xml_help = '';
1079: if ($filetype eq 'html') {
1080: $xml_help=Apache::loncommon::helpLatexCheatsheet();
1081: }
1082: my $cleanbut = '';
1083: if ($filetype eq 'html') {
1084: $cleanbut='<input type="submit" name="attemptclean"
1085: value="Save and then attempt to clean HTML" />';
1086: }
1087: my $titledisplay=&display_title();
1088: my $buttons=(<<BUTTONS);
1089: $cleanbut
1090: <input type="submit" name="savethisfile" value="Save this" />
1091: <input type="submit" name="viewmode" value="View" />
1092: BUTTONS
1093: my $editfooter=(<<ENDFOOTER);
1094: <hr />
1095: <a name="editsection" />
1096: <form method="post">
1097: $xml_help
1098: <input type="hidden" name="editmode" value="Edit" />
1099: $buttons<br />
1100: <textarea cols="80" rows="40" name="filecont">$filecontents</textarea>
1101: <br />$buttons
1102: <br />
1103: </form>
1104: $titledisplay
1105: ENDFOOTER
1106: # $result=~s/(\<body[^\>]*\>)/$1$editheader/is;
1107: $result=~s/(\<\/body\>)/$editfooter/is;
1108: return $result;
1109: }
1110:
1111: sub get_target {
1112: my $viewgrades=&Apache::lonnet::allowed('vgr',$ENV{'request.course.id'});
1113: if ( $ENV{'request.state'} eq 'published') {
1114: if ( defined($ENV{'form.grade_target'})
1115: && ($viewgrades == 'F' )) {
1116: return ($ENV{'form.grade_target'});
1117: } elsif (defined($ENV{'form.grade_target'})) {
1118: if (($ENV{'form.grade_target'} eq 'web') ||
1119: ($ENV{'form.grade_target'} eq 'tex') ) {
1120: return $ENV{'form.grade_target'}
1121: } else {
1122: return 'web';
1123: }
1124: } else {
1125: return 'web';
1126: }
1127: } elsif ($ENV{'request.state'} eq 'construct') {
1128: if ( defined($ENV{'form.grade_target'})) {
1129: return ($ENV{'form.grade_target'});
1130: } else {
1131: return 'web';
1132: }
1133: } else {
1134: return 'web';
1135: }
1136: }
1137:
1138: sub handler {
1139: my $request=shift;
1140:
1141: my $target=&get_target();
1142:
1143: $Apache::lonxml::debug=$ENV{'user.debug'};
1144:
1145: if ($ENV{'browser.mathml'}) {
1146: $request->content_type('text/xml');
1147: } else {
1148: $request->content_type('text/html');
1149: }
1150: &Apache::loncommon::no_cache($request);
1151: $request->send_http_header;
1152:
1153: return OK if $request->header_only;
1154:
1155:
1156: my $file=&Apache::lonnet::filelocation("",$request->uri);
1157: my $filetype;
1158: if ($file =~ /\.sty$/) {
1159: $filetype='sty';
1160: } else {
1161: $filetype='html';
1162: }
1163: #
1164: # Edit action? Save file.
1165: #
1166: unless ($ENV{'request.state'} eq 'published') {
1167: if (($ENV{'form.savethisfile'}) || ($ENV{'form.attemptclean'})) {
1168: if (&storefile($file,$ENV{'form.filecont'})) {
1169: $request->print("<font COLOR=\"#0000FF\">Updated: ". strftime("%d %b %H:%M:%S",localtime())." </font>");
1170: }
1171: }
1172: }
1173: my %mystyle;
1174: my $result = '';
1175: my $filecontents=&Apache::lonnet::getfile($file);
1176: if ($filecontents eq -1) {
1177: $result=(<<ENDNOTFOUND);
1178: <html>
1179: <head>
1180: <title>File not found</title>
1181: </head>
1182: <body bgcolor="#FFFFFF">
1183: <b>File not found: $file</b>
1184: </body>
1185: </html>
1186: ENDNOTFOUND
1187: $filecontents='';
1188: if ($ENV{'request.state'} ne 'published') {
1189: if ($filetype eq 'sty') {
1190: $filecontents=&createnewsty();
1191: } else {
1192: $filecontents=&createnewhtml();
1193: }
1194: $ENV{'form.editmode'}='Edit'; #force edit mode
1195: }
1196: } else {
1197: unless ($ENV{'request.state'} eq 'published') {
1198: if ($ENV{'form.attemptclean'}) {
1199: $filecontents=&htmlclean($filecontents,1);
1200: }
1201: #
1202: # we are in construction space, see if edit mode forced
1203: &Apache::loncommon::get_unprocessed_cgi
1204: ($ENV{'QUERY_STRING'},['editmode']);
1205: }
1206: if (!$ENV{'form.editmode'} || $ENV{'form.viewmode'}) {
1207: $result = &Apache::lonxml::xmlparse($request,$target,$filecontents,
1208: '',%mystyle);
1209: }
1210: }
1211:
1212: #
1213: # Edit action? Insert editing commands
1214: #
1215: unless ($ENV{'request.state'} eq 'published') {
1216: if ($ENV{'form.editmode'} && (!($ENV{'form.viewmode'}))) {
1217: my $displayfile=$request->uri;
1218: $displayfile=~s/^\/[^\/]*//;
1219: $result='<html><body bgcolor="#FFFFFF"><h3>'.$displayfile.
1220: '</h3></body></html>';
1221: $result=&inserteditinfo($result,$filecontents,$filetype);
1222: }
1223: }
1224: if ($filetype eq 'html') { writeallows($request->uri); }
1225:
1226:
1227:
1228: $request->print($result);
1229:
1230: return OK;
1231: }
1232:
1233: sub display_title {
1234: my $result;
1235: if ($ENV{'request.state'} eq 'construct') {
1236: my $title=&Apache::lonnet::gettitle();
1237: if (!defined($title) || $title eq '') {
1238: $title = $ENV{'request.filename'};
1239: $title = substr($title, rindex($title, '/') + 1);
1240: }
1241: $result = "<script type='text/javascript'>top.document.title = '$title - LON-CAPA Construction Space';</script>";
1242: }
1243: return $result;
1244: }
1245:
1246: sub debug {
1247: if ($Apache::lonxml::debug eq 1) {
1248: $|=1;
1249: print('<font size="-2"<pre>DEBUG:'.&HTML::Entities::encode($_[0])."</pre></font>\n");
1250: }
1251: }
1252:
1253: sub error {
1254: $errorcount++;
1255: if (($Apache::lonxml::debug eq 1) || ($ENV{'request.state'} eq 'construct') ) {
1256: # If printing in construction space, put the error inside <pre></pre>
1257: print "<b>ERROR:</b>".join("\n",@_)."\n";
1258: } else {
1259: print "<b>An Error occured while processing this resource. The instructor has been notified.</b> <br />";
1260: #notify author
1261: &Apache::lonmsg::author_res_msg($ENV{'request.filename'},join('<br />',@_));
1262: #notify course
1263: if ( $ENV{'request.course.id'} ) {
1264: my (undef,%users)=&Apache::lonfeedback::decide_receiver(undef,0,1,1,1);
1265: my $declutter=&Apache::lonnet::declutter($ENV{'request.filename'});
1266: foreach (keys %users) {
1267: my ($user,$domain) = split(/:/, $_);
1268: &Apache::lonmsg::user_normal_msg($user,$domain,
1269: "Error [$declutter]",join('<br />',@_));
1270: }
1271: }
1272:
1273: #FIXME probably shouldn't have me get everything forever.
1274: &Apache::lonmsg::user_normal_msg('albertel','msu',"Error in $ENV{'request.filename'}",join('<br />',@_));
1275: #&Apache::lonmsg::user_normal_msg('albertel','103',"Error in $ENV{'request.filename'}",$_[0]);
1276: }
1277: }
1278:
1279: sub warning {
1280: $warningcount++;
1281:
1282: if ($ENV{'form.grade_target'} ne 'tex') {
1283: if ($ENV{'request.state'} eq 'construct' || $Apache::lonxml::debug) {
1284: print "<b>W</b>ARNING<b>:</b>".join('<br />',@_)."<br />\n";
1285: }
1286: }
1287: }
1288:
1289: sub get_param {
1290: my ($param,$parstack,$safeeval,$context,$case_insensitive) = @_;
1291: if ( ! $context ) { $context = -1; }
1292: my $args ='';
1293: if ( $#$parstack > (-2-$context) ) { $args=$$parstack[$context]; }
1294: if ( ! $args ) { return undef; }
1295: if ( $case_insensitive ) {
1296: if ($args =~ s/(my \$)(\Q$param\E)(=\")/$1.lc($2).$3/ei) {
1297: return &Apache::run::run("{$args;".'return $'.$param.'}',
1298: $safeeval); #'
1299: } else {
1300: return undef;
1301: }
1302: } else {
1303: if ( $args =~ /my \$\Q$param\E=\"/ ) {
1304: return &Apache::run::run("{$args;".'return $'.$param.'}',
1305: $safeeval); #'
1306: } else {
1307: return undef;
1308: }
1309: }
1310: }
1311:
1312: sub get_param_var {
1313: my ($param,$parstack,$safeeval,$context,$case_insensitive) = @_;
1314: if ( ! $context ) { $context = -1; }
1315: my $args ='';
1316: if ( $#$parstack > (-2-$context) ) { $args=$$parstack[$context]; }
1317: &Apache::lonxml::debug("Args are $args param is $param");
1318: if ($case_insensitive) {
1319: if (! ($args=~s/(my \$)(\Q$param\E)(=\")/$1.lc($2).$3/ei)) {
1320: return undef;
1321: }
1322: } elsif ( $args !~ /my \$\Q$param\E=\"/ ) { return undef; }
1323: my $value=&Apache::run::run("{$args;".'return $'.$param.'}',$safeeval); #'
1324: &Apache::lonxml::debug("first run is $value");
1325: if ($value =~ /^[\$\@\%]\w+$/) {
1326: &Apache::lonxml::debug("doing second");
1327: my @result=&Apache::run::run("return $value",$safeeval,1);
1328: if (!defined($result[0])) {
1329: return $value
1330: } else {
1331: if (wantarray) { return @result; } else { return $result[0]; }
1332: }
1333: } else {
1334: return $value;
1335: }
1336: }
1337:
1338: sub register_insert {
1339: my @data = split /\n/, &Apache::lonnet::getfile('/home/httpd/lonTabs/insertlist.tab');
1340: my $i;
1341: my $tagnum=0;
1342: my @order;
1343: for ($i=0;$i < $#data; $i++) {
1344: my $line = $data[$i];
1345: if ( $line =~ /^\#/ || $line =~ /^\s*\n/) { next; }
1346: if ( $line =~ /TABLE/ ) { last; }
1347: my ($tag,$descrip,$color,$function,$show,$helpfile,$helpdesc) = split(/,/, $line);
1348: if ($tag) {
1349: $insertlist{"$tagnum.tag"} = $tag;
1350: $insertlist{"$tagnum.description"} = $descrip;
1351: $insertlist{"$tagnum.color"} = $color;
1352: $insertlist{"$tagnum.function"} = $function;
1353: if (!defined($show)) { $show='yes'; }
1354: $insertlist{"$tagnum.show"}= $show;
1355: $insertlist{"$tagnum.helpfile"} = $helpfile;
1356: $insertlist{"$tagnum.helpdesc"} = $helpdesc;
1357: $insertlist{"$tag.num"}=$tagnum;
1358: $tagnum++;
1359: }
1360: }
1361: $i++; #skipping TABLE line
1362: $tagnum = 0;
1363: for (;$i < $#data;$i++) {
1364: my $line = $data[$i];
1365: my ($mnemonic,@which) = split(/ +/,$line);
1366: my $tag = $insertlist{"$tagnum.tag"};
1367: for (my $j=0;$j <=$#which;$j++) {
1368: if ( $which[$j] eq 'Y' ) {
1369: if ($insertlist{"$j.show"} ne 'no') {
1370: push(@{ $insertlist{"$tag.which"} },$j);
1371: }
1372: }
1373: }
1374: $tagnum++;
1375: }
1376: }
1377:
1378: sub description {
1379: my ($token)=@_;
1380: my $tagnum;
1381: my $tag=$token->[1];
1382: foreach my $namespace (reverse @Apache::lonxml::namespace) {
1383: my $testtag=$namespace.'::'.$tag;
1384: $tagnum=$insertlist{"$testtag.num"};
1385: if (defined($tagnum)) { last; }
1386: }
1387: if (!defined ($tagnum)) { $tagnum=$Apache::lonxml::insertlist{"$tag.num"}; }
1388: return $insertlist{$tagnum.'.description'};
1389: }
1390:
1391: # Returns a list containing the help file, and the description
1392: sub helpinfo {
1393: my ($token)=@_;
1394: my $tagnum;
1395: my $tag=$token->[1];
1396: foreach my $namespace (reverse @Apache::lonxml::namespace) {
1397: my $testtag=$namespace.'::'.$tag;
1398: $tagnum=$insertlist{"$testtag.num"};
1399: if (defined($tagnum)) { last; }
1400: }
1401: if (!defined ($tagnum)) { $tagnum=$Apache::lonxml::insertlist{"$tag.num"}; }
1402: return ($insertlist{$tagnum.'.helpfile'}, $insertlist{$tagnum.'.helpdesc'});
1403: }
1404:
1405: # ----------------------------------------------------------------- whichuser
1406: # returns a list of $symb, $courseid, $domain, $name that is correct for
1407: # calls to lonnet functions for this setup.
1408: # - looks for form.grade_ parameters
1409: sub whichuser {
1410: my ($passedsymb)=@_;
1411: my ($symb,$courseid,$domain,$name,$publicuser);
1412: if (defined($ENV{'form.grade_symb'})) {
1413: my $tmp_courseid=$ENV{'form.grade_courseid'};
1414: my $allowed=&Apache::lonnet::allowed('vgr',$tmp_courseid);
1415: if ($allowed) {
1416: $symb=$ENV{'form.grade_symb'};
1417: $courseid=$ENV{'form.grade_courseid'};
1418: $domain=$ENV{'form.grade_domain'};
1419: $name=$ENV{'form.grade_username'};
1420: }
1421: } else {
1422: if (!$passedsymb) {
1423: $symb=&Apache::lonnet::symbread();
1424: } else {
1425: $symb=$passedsymb;
1426: }
1427: $courseid=$ENV{'request.course.id'};
1428: $domain=$ENV{'user.domain'};
1429: $name=$ENV{'user.name'};
1430: if ($name eq 'public' && $domain eq 'public') {
1431: if (!defined($ENV{'form.username'})) {
1432: $ENV{'form.username'}.=time.rand(10000000);
1433: }
1434: $name.=$ENV{'form.username'};
1435: }
1436: }
1437: return ($symb,$courseid,$domain,$name,$publicuser);
1438: }
1439:
1440: 1;
1441: __END__
1442:
1443:
FreeBSD-CVSweb <freebsd-cvsweb@FreeBSD.org>
![[BACK]](/icons/back.gif){kind=icon}
Return to lonxml.pm CVS log ![[TXT]](/icons/text.gif){kind=icon}
![[DIR]](/icons/dir.gif){kind=icon}
Up to [LON-CAPA] / loncom / xml