1: # The LearningOnline Network with CAPA
2: # XML Parser Module
3: #
4: # $Id: lonxml.pm,v 1.296 2003/12/09 16:52:13 albertel Exp $
5: #
6: # Copyright Michigan State University Board of Trustees
7: #
8: # This file is part of the LearningOnline Network with CAPA (LON-CAPA).
9: #
10: # LON-CAPA is free software; you can redistribute it and/or modify
11: # it under the terms of the GNU General Public License as published by
12: # the Free Software Foundation; either version 2 of the License, or
13: # (at your option) any later version.
14: #
15: # LON-CAPA is distributed in the hope that it will be useful,
16: # but WITHOUT ANY WARRANTY; without even the implied warranty of
17: # MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
18: # GNU General Public License for more details.
19: #
20: # You should have received a copy of the GNU General Public License
21: # along with LON-CAPA; if not, write to the Free Software
22: # Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA 02111-1307 USA
23: #
24: # /home/httpd/html/adm/gpl.txt
25: #
26: # http://www.lon-capa.org/
27: #
28: # Copyright for TtHfunc and TtMfunc by Ian Hutchinson.
29: # TtHfunc and TtMfunc (the "Code") may be compiled and linked into
30: # binary executable programs or libraries distributed by the
31: # Michigan State University (the "Licensee"), but any binaries so
32: # distributed are hereby licensed only for use in the context
33: # of a program or computational system for which the Licensee is the
34: # primary author or distributor, and which performs substantial
35: # additional tasks beyond the translation of (La)TeX into HTML.
36: # The C source of the Code may not be distributed by the Licensee
37: # to any other parties under any circumstances.
38: #
39: # last modified 06/26/00 by Alexander Sakharuk
40: # 11/6 Gerd Kortemeyer
41: # 6/1/1 Gerd Kortemeyer
42: # 2/21,3/13 Guy
43: # 3/29,5/4 Gerd Kortemeyer
44: # 5/26 Gerd Kortemeyer
45: # 5/27 H. K. Ng
46: # 6/2,6/3,6/8,6/9 Gerd Kortemeyer
47: # 6/12,6/13 H. K. Ng
48: # 6/16 Gerd Kortemeyer
49: # 7/27 H. K. Ng
50: # 8/7,8/9,8/10,8/11,8/15,8/16,8/17,8/18,8/20,8/23,8/24 Gerd Kortemeyer
51: # Guy Albertelli
52: # 9/26 Gerd Kortemeyer
53: # Dec Guy Albertelli
54: # YEAR=2002
55: # 1/1 Gerd Kortemeyer
56: # 1/2 Matthew Hall
57: # 1/3 Gerd Kortemeyer
58: #
59:
60: package Apache::lonxml;
61: use vars
62: qw(@pwd @outputstack $redirection $import @extlinks $metamode $evaluate %insertlist @namespace $prevent_entity_encode $errorcount $warningcount);
63: use strict;
64: use HTML::LCParser();
65: use HTML::TreeBuilder();
66: use HTML::Entities();
67: use Safe();
68: use Safe::Hole();
69: use Math::Cephes();
70: use Math::Random();
71: use Opcode();
72: use POSIX qw(strftime);
73:
74:
75: sub register {
76: my ($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::languagetags();
100: use Apache::edit();
101: use Apache::inputtags();
102: use Apache::outputtags();
103: use Apache::lonnet();
104: use Apache::File();
105: use Apache::loncommon();
106: use Apache::lonfeedback();
107: use Apache::lonmsg();
108: use Apache::loncacc();
109: use Apache::lonlocal;
110:
111: #================================================== Main subroutine: xmlparse
112: #debugging control, to turn on debugging modify the correct handler
113: $Apache::lonxml::debug=0;
114:
115: # keeps count of the number of warnings and errors generated in a parse
116: $warningcount=0;
117: $errorcount=0;
118:
119: #path to the directory containing the file currently being processed
120: @pwd=();
121:
122: #these two are used for capturing a subset of the output for later processing,
123: #don't touch them directly use &startredirection and &endredirection
124: @outputstack = ();
125: $redirection = 0;
126:
127: #controls wheter the <import> tag actually does
128: $import = 1;
129: @extlinks=();
130:
131: # meta mode is a bit weird only some output is to be turned off
132: #<output> tag turns metamode off (defined in londefdef.pm)
133: $metamode = 0;
134:
135: # turns on and of run::evaluate actually derefencing var refs
136: $evaluate = 1;
137:
138: # data structure for eidt mode, determines what tags can go into what other tags
139: %insertlist=();
140:
141: # stores the list of active tag namespaces
142: @namespace=();
143:
144: # if 0 all high ASCII characters will be encoded into HTML Entities
145: $prevent_entity_encode=0;
146:
147: # has the dynamic menu been updated to know about this resource
148: $Apache::lonxml::registered=0;
149:
150: # a pointer the the Apache request object
151: $Apache::lonxml::request='';
152:
153: # a problem number counter, and check on ether it is used
154: $Apache::lonxml::counter=1;
155: $Apache::lonxml::counter_changed=0;
156:
157: #internal check on whether to look at style defs
158: $Apache::lonxml::usestyle=1;
159:
160: #locations used to store the parameter string for style substitutions
161: $Apache::lonxml::style_values='';
162: $Apache::lonxml::style_end_values='';
163:
164: #array of ssi calls that need to occur after we are done parsing
165: @Apache::lonxml::ssi_info=();
166:
167: #should we do the postag variable interpolation
168: $Apache::lonxml::post_evaluate=1;
169:
170: #a header message to emit in the case of any generated warning or errors
171: $Apache::lonxml::warnings_error_header='';
172:
173: sub xmlbegin {
174: my $output='';
175: if ($ENV{'browser.mathml'}) {
176: $output='<?xml version="1.0"?>'
177: .'<?xml-stylesheet type="text/css" href="/adm/MathML/mathml.css"?>'
178: .'<!DOCTYPE html SYSTEM "/adm/MathML/mathml.dtd" '
179: .'[<!ENTITY mathns "http://www.w3.org/1998/Math/MathML">]>'
180: .'<html xmlns:math="http://www.w3.org/1998/Math/MathML" '
181: .'xmlns="http://www.w3.org/TR/REC-html40">';
182: } else {
183: $output='<html>';
184: }
185: return $output;
186: }
187:
188: sub xmlend {
189: my $mode='xml';
190: my $status='OPEN';
191: if ($Apache::lonhomework::parsing_a_problem) {
192: $mode='problem';
193: $status=$Apache::inputtags::status[-1];
194: }
195: return &Apache::lonfeedback::list_discussion().'</html>';
196: }
197:
198: sub tokeninputfield {
199: my $defhost=$Apache::lonnet::perlvar{'lonHostID'};
200: $defhost=~tr/a-z/A-Z/;
201: return (<<ENDINPUTFIELD)
202: <script type="text/javascript">
203: function updatetoken() {
204: var comp=new Array;
205: var barcode=unescape(document.tokeninput.barcode.value);
206: comp=barcode.split('*');
207: if (typeof(comp[0])!="undefined") {
208: document.tokeninput.codeone.value=comp[0];
209: }
210: if (typeof(comp[1])!="undefined") {
211: document.tokeninput.codetwo.value=comp[1];
212: }
213: if (typeof(comp[2])!="undefined") {
214: comp[2]=comp[2].toUpperCase();
215: document.tokeninput.codethree.value=comp[2];
216: }
217: document.tokeninput.barcode.value='';
218: }
219: </script>
220: <form method="post" name="tokeninput">
221: <table border="2" bgcolor="#FFFFBB">
222: <tr><th>DocID Checkin</th></tr>
223: <tr><td>
224: <table>
225: <tr>
226: <td>Scan in Barcode</td>
227: <td><input type="text" size="22" name="barcode"
228: onChange="updatetoken()"/></td>
229: </tr>
230: <tr><td><i>or</i> Type in DocID</td>
231: <td>
232: <input type="text" size="5" name="codeone" />
233: <b><font size="+2">*</font></b>
234: <input type="text" size="5" name="codetwo" />
235: <b><font size="+2">*</font></b>
236: <input type="text" size="10" name="codethree" value="$defhost"
237: onChange="this.value=this.value.toUpperCase()" />
238: </td></tr>
239: </table>
240: </td></tr>
241: <tr><td><input type="submit" value="Check in DocID" /></td></tr>
242: </table>
243: </form>
244: ENDINPUTFIELD
245: }
246:
247: sub maketoken {
248: my ($symb,$tuname,$tudom,$tcrsid)=@_;
249: unless ($symb) {
250: $symb=&Apache::lonnet::symbread();
251: }
252: unless ($tuname) {
253: $tuname=$ENV{'user.name'};
254: $tudom=$ENV{'user.domain'};
255: $tcrsid=$ENV{'request.course.id'};
256: }
257:
258: return &Apache::lonnet::checkout($symb,$tuname,$tudom,$tcrsid);
259: }
260:
261: sub printtokenheader {
262: my ($target,$token,$tsymb,$tcrsid,$tudom,$tuname)=@_;
263: unless ($token) { return ''; }
264:
265: my ($symb,$courseid,$domain,$name) = &Apache::lonxml::whichuser();
266: unless ($tsymb) {
267: $tsymb=$symb;
268: }
269: unless ($tuname) {
270: $tuname=$name;
271: $tudom=$domain;
272: $tcrsid=$courseid;
273: }
274:
275: my %reply=&Apache::lonnet::get('environment',
276: ['firstname','middlename','lastname','generation'],
277: $tudom,$tuname);
278: my $plainname=$reply{'firstname'}.' '.
279: $reply{'middlename'}.' '.
280: $reply{'lastname'}.' '.
281: $reply{'generation'};
282:
283: if ($target eq 'web') {
284: my %idhash=&Apache::lonnet::idrget($tudom,($tuname));
285: return
286: '<img align="right" src="/cgi-bin/barcode.png?encode='.$token.'" />'.
287: &mt('Checked out for').' '.$plainname.
288: '<br />'.&mt('User').': '.$tuname.' at '.$tudom.
289: '<br />'.&mt('ID').': '.$idhash{$tuname}.
290: '<br />'.&mt('CourseID').': '.$tcrsid.
291: '<br />'.&mt('Course').': '.$ENV{'course.'.$tcrsid.'.description'}.
292: '<br />'.&mt('DocID').': '.$token.
293: '<br />'.&mt('Time').': '.&Apache::lonlocal::locallocaltime().'<hr />';
294: } else {
295: return $token;
296: }
297: }
298:
299: sub fontsettings() {
300: my $headerstring='';
301: if (($ENV{'browser.os'} eq 'mac') && (!$ENV{'browser.mathml'})) {
302: $headerstring.=
303: '<meta Content-Type="text/html; charset=x-mac-roman">';
304: } elsif (!$ENV{'browser.mathml'} && $ENV{'browser.unicode'}) {
305: $headerstring.=
306: '<meta http-equiv="Content-Type" content="text/html; charset=utf-8" />';
307: }
308: return $headerstring;
309: }
310:
311: sub printalltags {
312: my $temp;
313: foreach $temp (sort keys %Apache::lonxml::alltags) {
314: &Apache::lonxml::debug("$temp -- ".
315: join(',',@{ $Apache::lonxml::alltags{$temp} }));
316: }
317: }
318:
319: sub xmlparse {
320: my ($request,$target,$content_file_string,$safeinit,%style_for_target) = @_;
321:
322: &setup_globals($request,$target);
323: &Apache::inputtags::initialize_inputtags();
324: &Apache::outputtags::initialize_outputtags();
325: &Apache::edit::initialize_edit();
326: &Apache::londefdef::initialize_londefdef();
327:
328: #
329: # do we have a course style file?
330: #
331:
332: if ($ENV{'request.course.id'} && $ENV{'request.state'} ne 'construct') {
333: my $bodytext=
334: $ENV{'course.'.$ENV{'request.course.id'}.'.default_xml_style'};
335: if ($bodytext) {
336: my $location=&Apache::lonnet::filelocation('',$bodytext);
337: my $styletext=&Apache::lonnet::getfile($location);
338: if ($styletext ne '-1') {
339: %style_for_target = (%style_for_target,
340: &Apache::style::styleparser($target,$styletext));
341: }
342: }
343: } elsif ($ENV{'construct.style'} && ($ENV{'request.state'} eq 'construct')) {
344: my $location=&Apache::lonnet::filelocation('',$ENV{'construct.style'});
345: my $styletext=&Apache::lonnet::getfile($location);
346: if ($styletext ne '-1') {
347: %style_for_target = (%style_for_target,
348: &Apache::style::styleparser($target,$styletext));
349: }
350: }
351: #&printalltags();
352: my @pars = ();
353: my $pwd=$ENV{'request.filename'};
354: $pwd =~ s:/[^/]*$::;
355: &newparser(\@pars,\$content_file_string,$pwd);
356:
357: my $safeeval = new Safe;
358: my $safehole = new Safe::Hole;
359: &init_safespace($target,$safeeval,$safehole,$safeinit);
360: #-------------------- Redefinition of the target in the case of compound target
361:
362: ($target, my @tenta) = split('&&',$target);
363:
364: my @stack = ();
365: my @parstack = ();
366: &initdepth;
367:
368: my $finaloutput = &inner_xmlparse($target,\@stack,\@parstack,\@pars,
369: $safeeval,\%style_for_target);
370:
371: if ($ENV{'request.uri'}) {
372: &writeallows($ENV{'request.uri'});
373: }
374: &do_registered_ssi();
375: if ($Apache::lonxml::counter_changed) { &store_counter() }
376: return $finaloutput;
377: }
378:
379: sub htmlclean {
380: my ($raw,$full)=@_;
381:
382: my $tree = HTML::TreeBuilder->new;
383: $tree->ignore_unknown(0);
384:
385: $tree->parse($raw);
386:
387: my $output= $tree->as_HTML(undef,' ');
388:
389: $output=~s/\<(br|hr|img|meta|allow)(.*?)\>/\<$1$2 \/\>/gis;
390: $output=~s/\<\/(br|hr|img|meta|allow)\>//gis;
391: unless ($full) {
392: $output=~s/\<[\/]*(body|head|html)\>//gis;
393: }
394:
395: $tree = $tree->delete;
396:
397: return $output;
398: }
399:
400: sub latex_special_symbols {
401: my ($string,$where)=@_;
402: if ($where eq 'header') {
403: $string =~ s/(\\|_|\^)/ /g;
404: $string =~ s/(\$|%|\#|&|\{|\})/\\$1/g;
405: $string =~ s/_/ /g;
406: } else {
407: $string=~s/\\ /\\char92 /g;
408: $string=~s/\^/\\\^ /g;
409: $string=~s/\~/\\char126 /g;
410: #fixup & if it doesn't look like
411: # { or α
412: $string=~s/(&(?!((\#[0-9]+)|([a-z]+));))/\\$1/gi;
413: $string=~s/([^&])\#/$1\\#/g;
414: $string=~s/(\$|_|{|})/\\$1/g;
415: $string=~s/\\char92 /\\texttt{\\char92}/g;
416: $string=~s/(>|<)/\$$1\$/g; #more or less
417: if ($string=~m/\d%/) {$string =~ s/(\d)%/$1\\%/g;} #percent after digit
418: if ($string=~m/\s%/) {$string =~ s/(\s)%/$1\\%/g;} #percent after space
419: if ($string eq '%.') {$string = '\%.';} #percent at the end of statement
420: }
421: return $string;
422: }
423:
424: sub inner_xmlparse {
425: my ($target,$stack,$parstack,$pars,$safeeval,$style_for_target)=@_;
426: my $finaloutput = '';
427: my $result;
428: my $token;
429: my $dontpop=0;
430: while ( $#$pars > -1 ) {
431: while ($token = $$pars['-1']->get_token) {
432: if (($token->[0] eq 'T') || ($token->[0] eq 'C') ) {
433: if ($metamode<1) {
434: my $text=$token->[1];
435: if ($token->[0] eq 'C' && $target eq 'tex') {
436: $text = '';
437: # $text = '%'.$text."\n";
438: }
439: $result.=$text;
440: }
441: } elsif (($token->[0] eq 'D')) {
442: if ($metamode<1 && $target eq 'web') {
443: my $text=$token->[1];
444: $result.=$text;
445: }
446: } elsif ($token->[0] eq 'PI') {
447: if ($metamode<1 && $target eq 'web') {
448: $result=$token->[2];
449: }
450: } elsif ($token->[0] eq 'S') {
451: # add tag to stack
452: push (@$stack,$token->[1]);
453: # add parameters list to another stack
454: push (@$parstack,&parstring($token));
455: &increasedepth($token);
456: if ($Apache::lonxml::usestyle &&
457: exists($$style_for_target{$token->[1]})) {
458: $Apache::lonxml::usestyle=0;
459: my $string=$$style_for_target{$token->[1]}.
460: '<LONCAPA_INTERNAL_TURN_STYLE_ON />';
461: &Apache::lonxml::newparser($pars,\$string);
462: $Apache::lonxml::style_values=$$parstack[-1];
463: $Apache::lonxml::style_end_values=$$parstack[-1];
464: } else {
465: $result = &callsub("start_$token->[1]", $target, $token, $stack,
466: $parstack, $pars, $safeeval, $style_for_target);
467: }
468: } elsif ($token->[0] eq 'E') {
469: if ($Apache::lonxml::usestyle &&
470: exists($$style_for_target{'/'."$token->[1]"})) {
471: $Apache::lonxml::usestyle=0;
472: my $string=$$style_for_target{'/'.$token->[1]}.
473: '<LONCAPA_INTERNAL_TURN_STYLE_ON end="'.$token->[1].'" />';
474: &Apache::lonxml::newparser($pars,\$string);
475: $Apache::lonxml::style_values=$Apache::lonxml::style_end_values;
476: $Apache::lonxml::style_end_values='';
477: $dontpop=1;
478: } else {
479: #clear out any tags that didn't end
480: while ($token->[1] ne $$stack['-1'] && ($#$stack > -1)) {
481: my $lasttag=$$stack[-1];
482: if ($token->[1] =~ /^$lasttag$/i) {
483: &Apache::lonxml::warning('Using tag </'.$token->[1].'> on line '.$token->[3].' as end tag to <'.$$stack[-1].'>');
484: last;
485: } else {
486: &Apache::lonxml::warning('Found tag </'.$token->[1].'> on line '.$token->[3].' when looking for </'.$$stack[-1].'> in file');
487: &end_tag($stack,$parstack,$token);
488: }
489: }
490: $result = &callsub("end_$token->[1]", $target, $token, $stack,
491: $parstack, $pars,$safeeval, $style_for_target);
492: }
493: } else {
494: &Apache::lonxml::error("Unknown token event :$token->[0]:$token->[1]:");
495: }
496: #evaluate variable refs in result
497: if ($Apache::lonxml::post_evaluate &&$result ne "") {
498: my $extras;
499: if (!$Apache::lonxml::usestyle) {
500: $extras=$Apache::lonxml::style_values;
501: }
502: if ( $#$parstack > -1 ) {
503: $result=&Apache::run::evaluate($result,$safeeval,$extras.$$parstack[-1]);
504: } else {
505: $result= &Apache::run::evaluate($result,$safeeval,$extras);
506: }
507: }
508: $Apache::lonxml::post_evaluate=1;
509:
510: if (($token->[0] eq 'T') || ($token->[0] eq 'C') || ($token->[0] eq 'D') ) {
511: #Style file definitions should be correct
512: if ($target eq 'tex' && ($Apache::lonxml::usestyle)) {
513: $result=&latex_special_symbols($result);
514: }
515: }
516:
517: # Encode any high ASCII characters
518: # if (!$Apache::lonxml::prevent_entity_encode) {
519: # $result=&HTML::Entities::encode($result,"\200-\377");
520: # }
521: if ($Apache::lonxml::redirection) {
522: $Apache::lonxml::outputstack['-1'] .= $result;
523: } else {
524: $finaloutput.=$result;
525: }
526: $result = '';
527:
528: if ($token->[0] eq 'E' && !$dontpop) {
529: &end_tag($stack,$parstack,$token);
530: }
531: $dontpop=0;
532: }
533: if ($#$pars > -1) {
534: pop @$pars;
535: pop @Apache::lonxml::pwd;
536: }
537: }
538:
539: # if ($target eq 'meta') {
540: # $finaloutput.=&endredirection;
541: # }
542:
543:
544: if (($ENV{'QUERY_STRING'}) && ($target eq 'web')) {
545: $finaloutput=&afterburn($finaloutput);
546: }
547: return $finaloutput;
548: }
549:
550: sub callsub {
551: my ($sub,$target,$token,$tagstack,$parstack,$parser,$safeeval,$style)=@_;
552: my $currentstring='';
553: my $nodefault;
554: {
555: my $sub1;
556: no strict 'refs';
557: my $tag=$token->[1];
558: # get utterly rid of extended html tags
559: if ($tag=~/^x\-/i) { return ''; }
560: my $space=$Apache::lonxml::alltags{$tag}[-1];
561: if (!$space) {
562: $tag=~tr/A-Z/a-z/;
563: $sub=~tr/A-Z/a-z/;
564: $space=$Apache::lonxml::alltags{$tag}[-1]
565: }
566:
567: my $deleted=0;
568: $Apache::lonxml::curdepth=join('_',@Apache::lonxml::depthcounter);
569: if (($token->[0] eq 'S') && ($target eq 'modified')) {
570: $deleted=&Apache::edit::handle_delete($space,$target,$token,$tagstack,
571: $parstack,$parser,$safeeval,
572: $style);
573: }
574: if (!$deleted) {
575: if ($space) {
576: #&Apache::lonxml::debug("Calling sub $sub in $space $metamode");
577: $sub1="$space\:\:$sub";
578: ($currentstring,$nodefault) = &$sub1($target,$token,$tagstack,
579: $parstack,$parser,$safeeval,
580: $style);
581: } else {
582: #&Apache::lonxml::debug("NOT Calling sub $sub in $space $metamode");
583: if ($metamode <1) {
584: if (defined($token->[4]) && ($metamode < 1)) {
585: $currentstring = $token->[4];
586: } else {
587: $currentstring = $token->[2];
588: }
589: }
590: }
591: # &Apache::lonxml::debug("nodefalt:$nodefault:");
592: if ($currentstring eq '' && $nodefault eq '') {
593: if ($target eq 'edit') {
594: #&Apache::lonxml::debug("doing default edit for $token->[1]");
595: if ($token->[0] eq 'S') {
596: $currentstring = &Apache::edit::tag_start($target,$token);
597: } elsif ($token->[0] eq 'E') {
598: $currentstring = &Apache::edit::tag_end($target,$token);
599: }
600: } elsif ($target eq 'modified') {
601: if ($token->[0] eq 'S') {
602: $currentstring = $token->[4];
603: $currentstring.=&Apache::edit::handle_insert();
604: } elsif ($token->[0] eq 'E') {
605: $currentstring = $token->[2];
606: $currentstring.=&Apache::edit::handle_insertafter($token->[1]);
607: } else {
608: $currentstring = $token->[2];
609: }
610: }
611: }
612: }
613: use strict 'refs';
614: }
615: return $currentstring;
616: }
617:
618: sub setup_globals {
619: my ($request,$target)=@_;
620: $Apache::lonxml::request=$request;
621: $Apache::lonxml::registered = 0;
622: $errorcount=0;
623: $warningcount=0;
624: $Apache::lonxml::default_homework_loaded=0;
625: $Apache::lonxml::usestyle=1;
626: &init_counter();
627: @Apache::lonxml::pwd=();
628: @Apache::lonxml::extlinks=();
629: @Apache::lonxml::ssi_info=();
630: $Apache::lonxml::post_evaluate=1;
631: $Apache::lonxml::warnings_error_header='';
632: if ($target eq 'meta') {
633: $Apache::lonxml::redirection = 0;
634: $Apache::lonxml::metamode = 1;
635: $Apache::lonxml::evaluate = 1;
636: $Apache::lonxml::import = 0;
637: } elsif ($target eq 'answer') {
638: $Apache::lonxml::redirection = 0;
639: $Apache::lonxml::metamode = 1;
640: $Apache::lonxml::evaluate = 1;
641: $Apache::lonxml::import = 1;
642: } elsif ($target eq 'grade') {
643: &startredirection;
644: $Apache::lonxml::metamode = 0;
645: $Apache::lonxml::evaluate = 1;
646: $Apache::lonxml::import = 1;
647: } elsif ($target eq 'modified') {
648: $Apache::lonxml::redirection = 0;
649: $Apache::lonxml::metamode = 0;
650: $Apache::lonxml::evaluate = 0;
651: $Apache::lonxml::import = 0;
652: } elsif ($target eq 'edit') {
653: $Apache::lonxml::redirection = 0;
654: $Apache::lonxml::metamode = 0;
655: $Apache::lonxml::evaluate = 0;
656: $Apache::lonxml::import = 0;
657: } elsif ($target eq 'analyze') {
658: $Apache::lonxml::redirection = 0;
659: $Apache::lonxml::metamode = 0;
660: $Apache::lonxml::evaluate = 1;
661: $Apache::lonxml::import = 1;
662: } else {
663: $Apache::lonxml::redirection = 0;
664: $Apache::lonxml::metamode = 0;
665: $Apache::lonxml::evaluate = 1;
666: $Apache::lonxml::import = 1;
667: }
668: }
669:
670: sub init_safespace {
671: my ($target,$safeeval,$safehole,$safeinit) = @_;
672: $safeeval->permit("entereval");
673: $safeeval->permit(":base_math");
674: $safeeval->permit("sort");
675: $safeeval->permit("time");
676: $safeeval->deny(":base_io");
677: $safehole->wrap(\&Apache::scripttag::xmlparse,$safeeval,'&xmlparse');
678: $safehole->wrap(\&Apache::outputtags::multipart,$safeeval,'&multipart');
679: $safehole->wrap(\&Apache::lonnet::EXT,$safeeval,'&EXT');
680:
681: $safehole->wrap(\&Math::Cephes::asin,$safeeval,'&asin');
682: $safehole->wrap(\&Math::Cephes::acos,$safeeval,'&acos');
683: $safehole->wrap(\&Math::Cephes::atan,$safeeval,'&atan');
684: $safehole->wrap(\&Math::Cephes::sinh,$safeeval,'&sinh');
685: $safehole->wrap(\&Math::Cephes::cosh,$safeeval,'&cosh');
686: $safehole->wrap(\&Math::Cephes::tanh,$safeeval,'&tanh');
687: $safehole->wrap(\&Math::Cephes::asinh,$safeeval,'&asinh');
688: $safehole->wrap(\&Math::Cephes::acosh,$safeeval,'&acosh');
689: $safehole->wrap(\&Math::Cephes::atanh,$safeeval,'&atanh');
690: $safehole->wrap(\&Math::Cephes::erf,$safeeval,'&erf');
691: $safehole->wrap(\&Math::Cephes::erfc,$safeeval,'&erfc');
692: $safehole->wrap(\&Math::Cephes::j0,$safeeval,'&j0');
693: $safehole->wrap(\&Math::Cephes::j1,$safeeval,'&j1');
694: $safehole->wrap(\&Math::Cephes::jn,$safeeval,'&jn');
695: $safehole->wrap(\&Math::Cephes::jv,$safeeval,'&jv');
696: $safehole->wrap(\&Math::Cephes::y0,$safeeval,'&y0');
697: $safehole->wrap(\&Math::Cephes::y1,$safeeval,'&y1');
698: $safehole->wrap(\&Math::Cephes::yn,$safeeval,'&yn');
699: $safehole->wrap(\&Math::Cephes::yv,$safeeval,'&yv');
700:
701: $safehole->wrap(\&Math::Cephes::bdtr ,$safeeval,'&bdtr' );
702: $safehole->wrap(\&Math::Cephes::bdtrc ,$safeeval,'&bdtrc' );
703: $safehole->wrap(\&Math::Cephes::bdtri ,$safeeval,'&bdtri' );
704: $safehole->wrap(\&Math::Cephes::btdtr ,$safeeval,'&btdtr' );
705: $safehole->wrap(\&Math::Cephes::chdtr ,$safeeval,'&chdtr' );
706: $safehole->wrap(\&Math::Cephes::chdtrc,$safeeval,'&chdtrc');
707: $safehole->wrap(\&Math::Cephes::chdtri,$safeeval,'&chdtri');
708: $safehole->wrap(\&Math::Cephes::fdtr ,$safeeval,'&fdtr' );
709: $safehole->wrap(\&Math::Cephes::fdtrc ,$safeeval,'&fdtrc' );
710: $safehole->wrap(\&Math::Cephes::fdtri ,$safeeval,'&fdtri' );
711: $safehole->wrap(\&Math::Cephes::gdtr ,$safeeval,'&gdtr' );
712: $safehole->wrap(\&Math::Cephes::gdtrc ,$safeeval,'&gdtrc' );
713: $safehole->wrap(\&Math::Cephes::nbdtr ,$safeeval,'&nbdtr' );
714: $safehole->wrap(\&Math::Cephes::nbdtrc,$safeeval,'&nbdtrc');
715: $safehole->wrap(\&Math::Cephes::nbdtri,$safeeval,'&nbdtri');
716: $safehole->wrap(\&Math::Cephes::ndtr ,$safeeval,'&ndtr' );
717: $safehole->wrap(\&Math::Cephes::ndtri ,$safeeval,'&ndtri' );
718: $safehole->wrap(\&Math::Cephes::pdtr ,$safeeval,'&pdtr' );
719: $safehole->wrap(\&Math::Cephes::pdtrc ,$safeeval,'&pdtrc' );
720: $safehole->wrap(\&Math::Cephes::pdtri ,$safeeval,'&pdtri' );
721: $safehole->wrap(\&Math::Cephes::stdtr ,$safeeval,'&stdtr' );
722: $safehole->wrap(\&Math::Cephes::stdtri,$safeeval,'&stdtri');
723:
724: # $safehole->wrap(\&Math::Cephes::new_fract,$safeeval,'&new_fract');
725: # $safehole->wrap(\&Math::Cephes::radd,$safeeval,'&radd');
726: # $safehole->wrap(\&Math::Cephes::rsub,$safeeval,'&rsub');
727: # $safehole->wrap(\&Math::Cephes::rmul,$safeeval,'&rmul');
728: # $safehole->wrap(\&Math::Cephes::rdiv,$safeeval,'&rdiv');
729: # $safehole->wrap(\&Math::Cephes::euclid,$safeeval,'&euclid');
730:
731: $safehole->wrap(\&Math::Random::random_beta,$safeeval,'&math_random_beta');
732: $safehole->wrap(\&Math::Random::random_chi_square,$safeeval,'&math_random_chi_square');
733: $safehole->wrap(\&Math::Random::random_exponential,$safeeval,'&math_random_exponential');
734: $safehole->wrap(\&Math::Random::random_f,$safeeval,'&math_random_f');
735: $safehole->wrap(\&Math::Random::random_gamma,$safeeval,'&math_random_gamma');
736: $safehole->wrap(\&Math::Random::random_multivariate_normal,$safeeval,'&math_random_multivariate_normal');
737: $safehole->wrap(\&Math::Random::random_multinomial,$safeeval,'&math_random_multinomial');
738: $safehole->wrap(\&Math::Random::random_noncentral_chi_square,$safeeval,'&math_random_noncentral_chi_square');
739: $safehole->wrap(\&Math::Random::random_noncentral_f,$safeeval,'&math_random_noncentral_f');
740: $safehole->wrap(\&Math::Random::random_normal,$safeeval,'&math_random_normal');
741: $safehole->wrap(\&Math::Random::random_permutation,$safeeval,'&math_random_permutation');
742: $safehole->wrap(\&Math::Random::random_permuted_index,$safeeval,'&math_random_permuted_index');
743: $safehole->wrap(\&Math::Random::random_uniform,$safeeval,'&math_random_uniform');
744: $safehole->wrap(\&Math::Random::random_poisson,$safeeval,'&math_random_poisson');
745: $safehole->wrap(\&Math::Random::random_uniform_integer,$safeeval,'&math_random_uniform_integer');
746: $safehole->wrap(\&Math::Random::random_negative_binomial,$safeeval,'&math_random_negative_binomial');
747: $safehole->wrap(\&Math::Random::random_binomial,$safeeval,'&math_random_binomial');
748: $safehole->wrap(\&Math::Random::random_seed_from_phrase,$safeeval,'&random_seed_from_phrase');
749: $safehole->wrap(\&Math::Random::random_set_seed_from_phrase,$safeeval,'&random_set_seed_from_phrase');
750: $safehole->wrap(\&Math::Random::random_get_seed,$safeeval,'&random_get_seed');
751: $safehole->wrap(\&Math::Random::random_set_seed,$safeeval,'&random_set_seed');
752:
753: #need to inspect this class of ops
754: # $safeeval->deny(":base_orig");
755: $safeinit .= ';$external::target="'.$target.'";';
756: my $rndseed;
757: my ($symb,$courseid,$domain,$name) = &Apache::lonxml::whichuser();
758: $rndseed=&Apache::lonnet::rndseed($symb,$courseid,$domain,$name);
759: $safeinit .= ';$external::randomseed='.$rndseed.';';
760: &Apache::lonxml::debug("Setting rndseed to $rndseed");
761: &Apache::run::run($safeinit,$safeeval);
762: }
763:
764: sub default_homework_load {
765: my ($safeeval)=@_;
766: &Apache::lonxml::debug('Loading default_homework');
767: my $default=&Apache::lonnet::getfile('/home/httpd/html/res/adm/includes/default_homework.lcpm');
768: if ($default eq -1) {
769: &Apache::lonxml::error("<b>Unable to find <i>default_homework.lcpm</i></b>");
770: } else {
771: &Apache::run::run($default,$safeeval);
772: $Apache::lonxml::default_homework_loaded=1;
773: }
774: }
775:
776: sub startredirection {
777: $Apache::lonxml::redirection++;
778: push (@Apache::lonxml::outputstack, '');
779: }
780:
781: sub endredirection {
782: if (!$Apache::lonxml::redirection) {
783: &Apache::lonxml::error("Endredirection was called, before a startredirection, perhaps you have unbalanced tags. Some debuging information:".join ":",caller);
784: return '';
785: }
786: $Apache::lonxml::redirection--;
787: pop @Apache::lonxml::outputstack;
788: }
789:
790: sub end_tag {
791: my ($tagstack,$parstack,$token)=@_;
792: pop(@$tagstack);
793: pop(@$parstack);
794: &decreasedepth($token);
795: }
796:
797: sub initdepth {
798: @Apache::lonxml::depthcounter=();
799: $Apache::lonxml::depth=-1;
800: $Apache::lonxml::olddepth=-1;
801: }
802:
803: sub increasedepth {
804: my ($token) = @_;
805: $Apache::lonxml::depth++;
806: $Apache::lonxml::depthcounter[$Apache::lonxml::depth]++;
807: if ($Apache::lonxml::depthcounter[$Apache::lonxml::depth]==1) {
808: $Apache::lonxml::olddepth=$Apache::lonxml::depth;
809: }
810: my $curdepth=join('_',@Apache::lonxml::depthcounter);
811: &Apache::lonxml::debug("s $Apache::lonxml::depth : $Apache::lonxml::olddepth : $curdepth : $token->[1]\n");
812: #print "<br />s $Apache::lonxml::depth : $Apache::lonxml::olddepth : $curdepth : $token->[1]\n";
813: }
814:
815: sub decreasedepth {
816: my ($token) = @_;
817: $Apache::lonxml::depth--;
818: if ($Apache::lonxml::depth<$Apache::lonxml::olddepth-1) {
819: $#Apache::lonxml::depthcounter--;
820: $Apache::lonxml::olddepth=$Apache::lonxml::depth+1;
821: }
822: if ( $Apache::lonxml::depth < -1) {
823: &Apache::lonxml::warning(&mt("Missing tags, unable to properly run file."));
824: $Apache::lonxml::depth='-1';
825: }
826: my $curdepth=join('_',@Apache::lonxml::depthcounter);
827: &Apache::lonxml::debug("e $Apache::lonxml::depth : $Apache::lonxml::olddepth : $token->[1] : $curdepth\n");
828: #print "<br />e $Apache::lonxml::depth : $Apache::lonxml::olddepth : $token->[1] : $curdepth\n";
829: }
830:
831: sub get_all_text_unbalanced {
832: #there is a copy of this in lonpublisher.pm
833: my($tag,$pars)= @_;
834: my $token;
835: my $result='';
836: $tag='<'.$tag.'>';
837: while ($token = $$pars[-1]->get_token) {
838: if (($token->[0] eq 'T')||($token->[0] eq 'C')||($token->[0] eq 'D')) {
839: $result.=$token->[1];
840: } elsif ($token->[0] eq 'PI') {
841: $result.=$token->[2];
842: } elsif ($token->[0] eq 'S') {
843: $result.=$token->[4];
844: } elsif ($token->[0] eq 'E') {
845: $result.=$token->[2];
846: }
847: if ($result =~ /(.*)\Q$tag\E(.*)/s) {
848: &Apache::lonxml::debug('Got a winner with leftovers ::'.$2);
849: &Apache::lonxml::debug('Result is :'.$1);
850: $result=$1;
851: my $redo=$tag.$2;
852: &Apache::lonxml::newparser($pars,\$redo);
853: last;
854: }
855: }
856: return $result
857: }
858:
859: sub increment_counter {
860: my ($increment) = @_;
861: if (defined($increment) && $increment gt 0) {
862: $Apache::lonxml::counter+=$increment;
863: } else {
864: $Apache::lonxml::counter++;
865: }
866: $Apache::lonxml::counter_changed=1;
867: }
868:
869: sub init_counter {
870: if (defined($ENV{'form.counter'})) {
871: $Apache::lonxml::counter=$ENV{'form.counter'};
872: $Apache::lonxml::counter_changed=0;
873: } else {
874: $Apache::lonxml::counter=1;
875: $Apache::lonxml::counter_changed=1;
876: }
877: }
878:
879: sub store_counter {
880: &Apache::lonnet::appenv(('form.counter' => $Apache::lonxml::counter));
881: return '';
882: }
883:
884: sub get_all_text {
885: my($tag,$pars,$style)= @_;
886: my $gotfullstack=1;
887: if (ref($pars) ne 'ARRAY') {
888: $gotfullstack=0;
889: $pars=[$pars];
890: }
891: if (ref($style) ne 'HASH') {
892: $style={};
893: }
894: my $depth=0;
895: my $token;
896: my $result='';
897: if ( $tag =~ m:^/: ) {
898: my $tag=substr($tag,1);
899: #&Apache::lonxml::debug("have:$tag:");
900: my $top_empty=0;
901: while (($depth >=0) && ($#$pars > -1) && (!$top_empty)) {
902: while (($depth >=0) && ($token = $$pars[-1]->get_token)) {
903: #&Apache::lonxml::debug("e token:$token->[0]:$depth:$token->[1]:".$#$pars.":".$#Apache::lonxml::pwd);
904: if (($token->[0] eq 'T')||($token->[0] eq 'C')||($token->[0] eq 'D')) {
905: $result.=$token->[1];
906: } elsif ($token->[0] eq 'PI') {
907: $result.=$token->[2];
908: } elsif ($token->[0] eq 'S') {
909: if ($token->[1] =~ /^$tag$/i) { $depth++; }
910: if ($token->[1] =~ /^LONCAPA_INTERNAL_TURN_STYLE_ON$/i) { $Apache::lonxml::usestyle=1; }
911: if ($token->[1] =~ /^LONCAPA_INTERNAL_TURN_STYLE_OFF$/i) { $Apache::lonxml::usestyle=0; }
912: $result.=$token->[4];
913: } elsif ($token->[0] eq 'E') {
914: if ( $token->[1] =~ /^$tag$/i) { $depth--; }
915: #skip sending back the last end tag
916: if ($depth == 0 && exists($$style{'/'.$token->[1]}) && $Apache::lonxml::usestyle) {
917: my $string=
918: '<LONCAPA_INTERNAL_TURN_STYLE_OFF end="yes" />'.
919: $$style{'/'.$token->[1]}.
920: $token->[2].
921: '<LONCAPA_INTERNAL_TURN_STYLE_ON />';
922: &Apache::lonxml::newparser($pars,\$string);
923: #&Apache::lonxml::debug("reParsing $string");
924: next;
925: }
926: if ($depth > -1) {
927: $result.=$token->[2];
928: } else {
929: $$pars[-1]->unget_token($token);
930: }
931: }
932: }
933: if (($depth >=0) && ($#$pars == 0) ) { $top_empty=1; }
934: if (($depth >=0) && ($#$pars > 0) ) {
935: pop(@$pars);
936: pop(@Apache::lonxml::pwd);
937: }
938: }
939: if ($top_empty && $depth >= 0) {
940: #never found the end tag ran out of text, throw error send back blank
941: &error('Never found end tag for <'.$tag.
942: '> current string <pre>'.
943: &HTML::Entities::encode($result).
944: '</pre>');
945: if ($gotfullstack) {
946: my $newstring='</'.$tag.'>'.$result;
947: &Apache::lonxml::newparser($pars,\$newstring);
948: }
949: $result='';
950: }
951: } else {
952: while ($#$pars > -1) {
953: while ($token = $$pars[-1]->get_token) {
954: #&Apache::lonxml::debug("s token:$token->[0]:$depth:$token->[1]");
955: if (($token->[0] eq 'T')||($token->[0] eq 'C')||
956: ($token->[0] eq 'D')) {
957: $result.=$token->[1];
958: } elsif ($token->[0] eq 'PI') {
959: $result.=$token->[2];
960: } elsif ($token->[0] eq 'S') {
961: if ( $token->[1] =~ /^$tag$/i) {
962: $$pars[-1]->unget_token($token); last;
963: } else {
964: $result.=$token->[4];
965: }
966: if ($token->[1] =~ /^LONCAPA_INTERNAL_TURN_STYLE_ON$/i) { $Apache::lonxml::usestyle=1; }
967: if ($token->[1] =~ /^LONCAPA_INTERNAL_TURN_STYLE_OFF$/i) { $Apache::lonxml::usestyle=0; }
968: } elsif ($token->[0] eq 'E') {
969: $result.=$token->[2];
970: }
971: }
972: if (($#$pars > 0) ) {
973: pop(@$pars);
974: pop(@Apache::lonxml::pwd);
975: } else { last; }
976: }
977: }
978: #&Apache::lonxml::debug("Exit:$result:");
979: return $result
980: }
981:
982: sub newparser {
983: my ($parser,$contentref,$dir) = @_;
984: push (@$parser,HTML::LCParser->new($contentref));
985: $$parser['-1']->xml_mode('1');
986: if ( $dir eq '' ) {
987: push (@Apache::lonxml::pwd, $Apache::lonxml::pwd[$#Apache::lonxml::pwd]);
988: } else {
989: push (@Apache::lonxml::pwd, $dir);
990: }
991: }
992:
993: sub parstring {
994: my ($token) = @_;
995: my $temp='';
996: foreach (@{$token->[3]}) {
997: unless ($_=~/\W/) {
998: my $val=$token->[2]->{$_};
999: $val =~ s/([\%\@\\\"\'])/\\$1/g;
1000: #if ($val =~ m/^[\%\@]/) { $val="\\".$val; }
1001: $temp .= "my \$$_=\"$val\";";
1002: }
1003: }
1004: return $temp;
1005: }
1006:
1007: sub writeallows {
1008: unless ($#extlinks>=0) { return; }
1009: my $thisurl='/res/'.&Apache::lonnet::declutter(shift);
1010: if ($ENV{'httpref.'.$thisurl}) {
1011: $thisurl=$ENV{'httpref.'.$thisurl};
1012: }
1013: my $thisdir=$thisurl;
1014: $thisdir=~s/\/[^\/]+$//;
1015: my %httpref=();
1016: foreach (@extlinks) {
1017: $httpref{'httpref.'.
1018: &Apache::lonnet::hreflocation($thisdir,$_)}=$thisurl;
1019: }
1020: @extlinks=();
1021: &Apache::lonnet::appenv(%httpref);
1022: }
1023:
1024: sub register_ssi {
1025: my ($url,%form)=@_;
1026: push (@Apache::lonxml::ssi_info,{'url'=>$url,'form'=>\%form});
1027: return '';
1028: }
1029:
1030: sub do_registered_ssi {
1031: foreach my $info (@Apache::lonxml::ssi_info) {
1032: my %form=%{ $info->{'form'}};
1033: my $url=$info->{'url'};
1034: &Apache::lonnet::ssi($url,%form);
1035: }
1036: }
1037: #
1038: # Afterburner handles anchors, highlights and links
1039: #
1040: sub afterburn {
1041: my $result=shift;
1042: &Apache::loncommon::get_unprocessed_cgi($ENV{'QUERY_STRING'},
1043: ['highlight','anchor','link']);
1044: if ($ENV{'form.highlight'}) {
1045: foreach (split(/\,/,$ENV{'form.highlight'})) {
1046: my $anchorname=$_;
1047: my $matchthis=$anchorname;
1048: $matchthis=~s/\_+/\\s\+/g;
1049: $result=~s/($matchthis)/\<font color=\"red\"\>$1\<\/font\>/gs;
1050: }
1051: }
1052: if ($ENV{'form.link'}) {
1053: foreach (split(/\,/,$ENV{'form.link'})) {
1054: my ($anchorname,$linkurl)=split(/\>/,$_);
1055: my $matchthis=$anchorname;
1056: $matchthis=~s/\_+/\\s\+/g;
1057: $result=~s/($matchthis)/\<a href=\"$linkurl\"\>$1\<\/a\>/gs;
1058: }
1059: }
1060: if ($ENV{'form.anchor'}) {
1061: my $anchorname=$ENV{'form.anchor'};
1062: my $matchthis=$anchorname;
1063: $matchthis=~s/\_+/\\s\+/g;
1064: $result=~s/($matchthis)/\<a name=\"$anchorname\"\>$1\<\/a\>/s;
1065: $result.=(<<"ENDSCRIPT");
1066: <script type="text/javascript">
1067: document.location.hash='$anchorname';
1068: </script>
1069: ENDSCRIPT
1070: }
1071: return $result;
1072: }
1073:
1074: sub storefile {
1075: my ($file,$contents)=@_;
1076: &Apache::lonnet::correct_line_ends(\$contents);
1077: if (my $fh=Apache::File->new('>'.$file)) {
1078: print $fh $contents;
1079: $fh->close();
1080: return 1;
1081: } else {
1082: &warning("Unable to save file $file");
1083: return 0;
1084: }
1085: }
1086:
1087: sub createnewhtml {
1088: my $filecontents=(<<SIMPLECONTENT);
1089: <html>
1090: <head>
1091: <title>
1092: Title of Document Goes Here
1093: </title>
1094: </head>
1095: <body bgcolor="#FFFFFF">
1096:
1097: Body of Document Goes Here
1098:
1099: </body>
1100: </html>
1101: SIMPLECONTENT
1102: return $filecontents;
1103: }
1104:
1105: sub createnewsty {
1106: my $filecontents=(<<SIMPLECONTENT);
1107: <definetag name="">
1108: <render>
1109: <web></web>
1110: <tex></tex>
1111: </render>
1112: </definetag>
1113: SIMPLECONTENT
1114: return $filecontents;
1115: }
1116:
1117:
1118: sub inserteditinfo {
1119: my ($result,$filecontents,$filetype)=@_;
1120: $filecontents = &HTML::Entities::encode($filecontents);
1121: # my $editheader='<a href="#editsection">Edit below</a><hr />';
1122: my $xml_help = '';
1123: if ($filetype eq 'html') {
1124: $xml_help=Apache::loncommon::helpLatexCheatsheet();
1125: }
1126: my $cleanbut = '';
1127: if ($filetype eq 'html') {
1128: $cleanbut='<input type="submit" name="attemptclean" value="'.
1129: &mt('Save and then attempt to clean HTML').'" />';
1130: }
1131: my $titledisplay=&display_title();
1132: my %lt=&Apache::lonlocal::texthash('st' => 'Save this',
1133: 'vi' => 'View',
1134: 'ed' => 'Edit');
1135: my $buttons=(<<BUTTONS);
1136: $cleanbut
1137: <input type="submit" name="savethisfile" value="$lt{'st'}" />
1138: <input type="submit" name="viewmode" value="$lt{'vi'}" />
1139: BUTTONS
1140: my $editfooter=(<<ENDFOOTER);
1141: <hr />
1142: <a name="editsection" />
1143: <form method="post">
1144: $xml_help
1145: <input type="hidden" name="editmode" value="$lt{'ed'}" />
1146: $buttons<br />
1147: <textarea cols="80" rows="40" name="filecont">$filecontents</textarea>
1148: <br />$buttons
1149: <br />
1150: </form>
1151: $titledisplay
1152: ENDFOOTER
1153: # $result=~s/(\<body[^\>]*\>)/$1$editheader/is;
1154: $result=~s/(\<\/body\>)/$editfooter/is;
1155: return $result;
1156: }
1157:
1158: sub get_target {
1159: my $viewgrades=&Apache::lonnet::allowed('vgr',$ENV{'request.course.id'});
1160: if ( $ENV{'request.state'} eq 'published') {
1161: if ( defined($ENV{'form.grade_target'})
1162: && ($viewgrades == 'F' )) {
1163: return ($ENV{'form.grade_target'});
1164: } elsif (defined($ENV{'form.grade_target'})) {
1165: if (($ENV{'form.grade_target'} eq 'web') ||
1166: ($ENV{'form.grade_target'} eq 'tex') ) {
1167: return $ENV{'form.grade_target'}
1168: } else {
1169: return 'web';
1170: }
1171: } else {
1172: return 'web';
1173: }
1174: } elsif ($ENV{'request.state'} eq 'construct') {
1175: if ( defined($ENV{'form.grade_target'})) {
1176: return ($ENV{'form.grade_target'});
1177: } else {
1178: return 'web';
1179: }
1180: } else {
1181: return 'web';
1182: }
1183: }
1184:
1185: sub handler {
1186: my $request=shift;
1187:
1188: my $target=&get_target();
1189:
1190: $Apache::lonxml::debug=$ENV{'user.debug'};
1191:
1192: if ($ENV{'browser.mathml'}) {
1193: &Apache::loncommon::content_type($request,'text/xml');
1194: } else {
1195: &Apache::loncommon::content_type($request,'text/html');
1196: }
1197: &Apache::loncommon::no_cache($request);
1198: $request->send_http_header;
1199:
1200: return OK if $request->header_only;
1201:
1202:
1203: my $file=&Apache::lonnet::filelocation("",$request->uri);
1204: my $filetype;
1205: if ($file =~ /\.sty$/) {
1206: $filetype='sty';
1207: } else {
1208: $filetype='html';
1209: }
1210: #
1211: # Edit action? Save file.
1212: #
1213: unless ($ENV{'request.state'} eq 'published') {
1214: if (($ENV{'form.savethisfile'}) || ($ENV{'form.attemptclean'})) {
1215: if (&storefile($file,$ENV{'form.filecont'})) {
1216: $request->print("<font COLOR=\"#0000FF\">".&mt('Updated').": ".
1217: &Apache::lonlocal::locallocaltime(time)." </font>");
1218: }
1219: }
1220: }
1221: my %mystyle;
1222: my $result = '';
1223: my $filecontents=&Apache::lonnet::getfile($file);
1224: if ($filecontents eq -1) {
1225: my $bodytag=&Apache::loncommon::bodytag('File Error');
1226: my $fnf=&mt('File not found');
1227: $result=(<<ENDNOTFOUND);
1228: <html>
1229: <head>
1230: <title>$fnf</title>
1231: </head>
1232: $bodytag
1233: <b>$fnf: $file</b>
1234: </body>
1235: </html>
1236: ENDNOTFOUND
1237: $filecontents='';
1238: if ($ENV{'request.state'} ne 'published') {
1239: if ($filetype eq 'sty') {
1240: $filecontents=&createnewsty();
1241: } else {
1242: $filecontents=&createnewhtml();
1243: }
1244: $ENV{'form.editmode'}='Edit'; #force edit mode
1245: }
1246: } else {
1247: unless ($ENV{'request.state'} eq 'published') {
1248: if ($ENV{'form.attemptclean'}) {
1249: $filecontents=&htmlclean($filecontents,1);
1250: }
1251: #
1252: # we are in construction space, see if edit mode forced
1253: &Apache::loncommon::get_unprocessed_cgi
1254: ($ENV{'QUERY_STRING'},['editmode']);
1255: }
1256: if (!$ENV{'form.editmode'} || $ENV{'form.viewmode'}) {
1257: $result = &Apache::lonxml::xmlparse($request,$target,$filecontents,
1258: '',%mystyle);
1259: }
1260: }
1261:
1262: #
1263: # Edit action? Insert editing commands
1264: #
1265: unless ($ENV{'request.state'} eq 'published') {
1266: if ($ENV{'form.editmode'} && (!($ENV{'form.viewmode'}))) {
1267: my $displayfile=$request->uri;
1268: $displayfile=~s/^\/[^\/]*//;
1269: $result='<html><body bgcolor="#FFFFFF"><h3>'.$displayfile.
1270: '</h3></body></html>';
1271: $result=&inserteditinfo($result,$filecontents,$filetype);
1272: }
1273: }
1274: if ($filetype eq 'html') { writeallows($request->uri); }
1275:
1276:
1277:
1278: $request->print($result);
1279:
1280: return OK;
1281: }
1282:
1283: sub display_title {
1284: my $result;
1285: if ($ENV{'request.state'} eq 'construct') {
1286: my $title=&Apache::lonnet::gettitle();
1287: if (!defined($title) || $title eq '') {
1288: $title = $ENV{'request.filename'};
1289: $title = substr($title, rindex($title, '/') + 1);
1290: }
1291: $result = "<script type='text/javascript'>top.document.title = '$title - LON-CAPA Construction Space';</script>";
1292: }
1293: return $result;
1294: }
1295:
1296: sub debug {
1297: if ($Apache::lonxml::debug eq 1) {
1298: $|=1;
1299: print('<font size="-2"<pre>DEBUG:'.&HTML::Entities::encode($_[0])."</pre></font>\n");
1300: }
1301: }
1302:
1303: sub error {
1304: $errorcount++;
1305: if (($Apache::lonxml::debug eq 1) || ($ENV{'request.state'} eq 'construct') ) {
1306: # If printing in construction space, put the error inside <pre></pre>
1307: print $Apache::lonxml::warnings_error_header.
1308: "<b>ERROR:</b>".join("\n",@_)."\n";
1309: $Apache::lonxml::warnings_error_header='';
1310: } else {
1311: print "<b>An Error occured while processing this resource. The instructor has been notified.</b> <br />";
1312: #notify author
1313: &Apache::lonmsg::author_res_msg($ENV{'request.filename'},join('<br />',@_));
1314: #notify course
1315: if ( $ENV{'request.course.id'} ) {
1316: my (undef,%users)=&Apache::lonfeedback::decide_receiver(undef,0,1,1,1);
1317: my $declutter=&Apache::lonnet::declutter($ENV{'request.filename'});
1318: foreach (keys %users) {
1319: my ($user,$domain) = split(/:/, $_);
1320: &Apache::lonmsg::user_normal_msg($user,$domain,
1321: "Error [$declutter]",join('<br />',@_));
1322: }
1323: }
1324:
1325: #FIXME probably shouldn't have me get everything forever.
1326: &Apache::lonmsg::user_normal_msg('albertel','msu',"Error in $ENV{'request.filename'}",join('<br />',@_));
1327: #&Apache::lonmsg::user_normal_msg('albertel','103',"Error in $ENV{'request.filename'}",$_[0]);
1328: }
1329: }
1330:
1331: sub warning {
1332: $warningcount++;
1333:
1334: if ($ENV{'form.grade_target'} ne 'tex') {
1335: if ($ENV{'request.state'} eq 'construct' || $Apache::lonxml::debug) {
1336: print $Apache::lonxml::warnings_error_header.
1337: "<b>W</b>ARNING<b>:</b>".join('<br />',@_)."<br />\n";
1338: $Apache::lonxml::warnings_error_header='';
1339: }
1340: }
1341: }
1342:
1343: sub get_param {
1344: my ($param,$parstack,$safeeval,$context,$case_insensitive) = @_;
1345: if ( ! $context ) { $context = -1; }
1346: my $args ='';
1347: if ( $#$parstack > (-2-$context) ) { $args=$$parstack[$context]; }
1348: if ( ! $args ) { return undef; }
1349: if ( $case_insensitive ) {
1350: if ($args =~ s/(my \$)(\Q$param\E)(=\")/$1.lc($2).$3/ei) {
1351: return &Apache::run::run("{$args;".'return $'.$param.'}',
1352: $safeeval); #'
1353: } else {
1354: return undef;
1355: }
1356: } else {
1357: if ( $args =~ /my \$\Q$param\E=\"/ ) {
1358: return &Apache::run::run("{$args;".'return $'.$param.'}',
1359: $safeeval); #'
1360: } else {
1361: return undef;
1362: }
1363: }
1364: }
1365:
1366: sub get_param_var {
1367: my ($param,$parstack,$safeeval,$context,$case_insensitive) = @_;
1368: if ( ! $context ) { $context = -1; }
1369: my $args ='';
1370: if ( $#$parstack > (-2-$context) ) { $args=$$parstack[$context]; }
1371: &Apache::lonxml::debug("Args are $args param is $param");
1372: if ($case_insensitive) {
1373: if (! ($args=~s/(my \$)(\Q$param\E)(=\")/$1.lc($2).$3/ei)) {
1374: return undef;
1375: }
1376: } elsif ( $args !~ /my \$\Q$param\E=\"/ ) { return undef; }
1377: my $value=&Apache::run::run("{$args;".'return $'.$param.'}',$safeeval); #'
1378: &Apache::lonxml::debug("first run is $value");
1379: if ($value =~ /^[\$\@\%]\w+$/) {
1380: &Apache::lonxml::debug("doing second");
1381: my @result=&Apache::run::run("return $value",$safeeval,1);
1382: if (!defined($result[0])) {
1383: return $value
1384: } else {
1385: if (wantarray) { return @result; } else { return $result[0]; }
1386: }
1387: } else {
1388: return $value;
1389: }
1390: }
1391:
1392: sub register_insert {
1393: my @data = split /\n/, &Apache::lonnet::getfile('/home/httpd/lonTabs/insertlist.tab');
1394: my $i;
1395: my $tagnum=0;
1396: my @order;
1397: for ($i=0;$i < $#data; $i++) {
1398: my $line = $data[$i];
1399: if ( $line =~ /^\#/ || $line =~ /^\s*\n/) { next; }
1400: if ( $line =~ /TABLE/ ) { last; }
1401: my ($tag,$descrip,$color,$function,$show,$helpfile,$helpdesc) = split(/,/, $line);
1402: if ($tag) {
1403: $insertlist{"$tagnum.tag"} = $tag;
1404: $insertlist{"$tagnum.description"} = $descrip;
1405: $insertlist{"$tagnum.color"} = $color;
1406: $insertlist{"$tagnum.function"} = $function;
1407: if (!defined($show)) { $show='yes'; }
1408: $insertlist{"$tagnum.show"}= $show;
1409: $insertlist{"$tagnum.helpfile"} = $helpfile;
1410: $insertlist{"$tagnum.helpdesc"} = $helpdesc;
1411: $insertlist{"$tag.num"}=$tagnum;
1412: $tagnum++;
1413: }
1414: }
1415: $i++; #skipping TABLE line
1416: $tagnum = 0;
1417: for (;$i < $#data;$i++) {
1418: my $line = $data[$i];
1419: my ($mnemonic,@which) = split(/ +/,$line);
1420: my $tag = $insertlist{"$tagnum.tag"};
1421: for (my $j=0;$j <=$#which;$j++) {
1422: if ( $which[$j] eq 'Y' ) {
1423: if ($insertlist{"$j.show"} ne 'no') {
1424: push(@{ $insertlist{"$tag.which"} },$j);
1425: }
1426: }
1427: }
1428: $tagnum++;
1429: }
1430: }
1431:
1432: sub description {
1433: my ($token)=@_;
1434: my $tagnum;
1435: my $tag=$token->[1];
1436: foreach my $namespace (reverse @Apache::lonxml::namespace) {
1437: my $testtag=$namespace.'::'.$tag;
1438: $tagnum=$insertlist{"$testtag.num"};
1439: if (defined($tagnum)) { last; }
1440: }
1441: if (!defined ($tagnum)) { $tagnum=$Apache::lonxml::insertlist{"$tag.num"}; }
1442: return $insertlist{$tagnum.'.description'};
1443: }
1444:
1445: # Returns a list containing the help file, and the description
1446: sub helpinfo {
1447: my ($token)=@_;
1448: my $tagnum;
1449: my $tag=$token->[1];
1450: foreach my $namespace (reverse @Apache::lonxml::namespace) {
1451: my $testtag=$namespace.'::'.$tag;
1452: $tagnum=$insertlist{"$testtag.num"};
1453: if (defined($tagnum)) { last; }
1454: }
1455: if (!defined ($tagnum)) { $tagnum=$Apache::lonxml::insertlist{"$tag.num"}; }
1456: return ($insertlist{$tagnum.'.helpfile'}, $insertlist{$tagnum.'.helpdesc'});
1457: }
1458:
1459: # ----------------------------------------------------------------- whichuser
1460: # returns a list of $symb, $courseid, $domain, $name that is correct for
1461: # calls to lonnet functions for this setup.
1462: # - looks for form.grade_ parameters
1463: sub whichuser {
1464: my ($passedsymb)=@_;
1465: my ($symb,$courseid,$domain,$name,$publicuser);
1466: if (defined($ENV{'form.grade_symb'})) {
1467: my $tmp_courseid=$ENV{'form.grade_courseid'};
1468: my $allowed=&Apache::lonnet::allowed('vgr',$tmp_courseid);
1469: if ($allowed) {
1470: $symb=$ENV{'form.grade_symb'};
1471: $courseid=$ENV{'form.grade_courseid'};
1472: $domain=$ENV{'form.grade_domain'};
1473: $name=$ENV{'form.grade_username'};
1474: }
1475: } else {
1476: if (!$passedsymb) {
1477: $symb=&Apache::lonnet::symbread();
1478: } else {
1479: $symb=$passedsymb;
1480: }
1481: $courseid=$ENV{'request.course.id'};
1482: $domain=$ENV{'user.domain'};
1483: $name=$ENV{'user.name'};
1484: if ($name eq 'public' && $domain eq 'public') {
1485: if (!defined($ENV{'form.username'})) {
1486: $ENV{'form.username'}.=time.rand(10000000);
1487: }
1488: $name.=$ENV{'form.username'};
1489: }
1490: }
1491: return ($symb,$courseid,$domain,$name,$publicuser);
1492: }
1493:
1494: 1;
1495: __END__
1496:
1497:
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