1: # The LearningOnline Network with CAPA
2: # XML Parser Module
3: #
4: # $Id: lonxml.pm,v 1.313 2004/03/23 00:47:48 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($mode,$status).'</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: $string=&Apache::lonprintout::character_chart($string);
407: # any & or # leftover should be safe to just escape
408: $string=~s/([^\\])\&/$1\\\&/g;
409: $string=~s/([^\\])\#/$1\\\#/g;
410: } else {
411: $string=~s/\\/\\ensuremath{\\backslash}/g;
412: $string=~s/([^\\]|^)\%/$1\\\%/g;
413: $string=~s/([^\\]|^)(\$|_)/$1\\$2/g;
414: $string=~s/\$\$/\$\\\$/g;
415: $string=~s/\#\#/\#\\\#/g;
416: $string=~s/([^\\]|^)(\~|\^)/$1\\$2\\strut /g;
417: $string=~s/(>|<)/\\ensuremath\{$1\}/g; #more or less
418: $string=&Apache::lonprintout::character_chart($string);
419: # any & or # leftover should be safe to just escape
420: $string=~s/([^\\]|^)\&/$1\\\&/g;
421: $string=~s/([^\\]|^)\#/$1\\\#/g;
422: #single { or } How to escape?
423: }
424: return $string;
425: }
426:
427: sub inner_xmlparse {
428: my ($target,$stack,$parstack,$pars,$safeeval,$style_for_target)=@_;
429: my $finaloutput = '';
430: my $result;
431: my $token;
432: my $dontpop=0;
433: while ( $#$pars > -1 ) {
434: while ($token = $$pars['-1']->get_token) {
435: if (($token->[0] eq 'T') || ($token->[0] eq 'C') ) {
436: if ($metamode<1) {
437: my $text=$token->[1];
438: if ($token->[0] eq 'C' && $target eq 'tex') {
439: $text = '';
440: # $text = '%'.$text."\n";
441: }
442: $result.=$text;
443: }
444: } elsif (($token->[0] eq 'D')) {
445: if ($metamode<1 && $target eq 'web') {
446: my $text=$token->[1];
447: $result.=$text;
448: }
449: } elsif ($token->[0] eq 'PI') {
450: if ($metamode<1 && $target eq 'web') {
451: $result=$token->[2];
452: }
453: } elsif ($token->[0] eq 'S') {
454: # add tag to stack
455: push (@$stack,$token->[1]);
456: # add parameters list to another stack
457: push (@$parstack,&parstring($token));
458: &increasedepth($token);
459: if ($Apache::lonxml::usestyle &&
460: exists($$style_for_target{$token->[1]})) {
461: $Apache::lonxml::usestyle=0;
462: my $string=$$style_for_target{$token->[1]}.
463: '<LONCAPA_INTERNAL_TURN_STYLE_ON />';
464: &Apache::lonxml::newparser($pars,\$string);
465: $Apache::lonxml::style_values=$$parstack[-1];
466: $Apache::lonxml::style_end_values=$$parstack[-1];
467: } else {
468: $result = &callsub("start_$token->[1]", $target, $token, $stack,
469: $parstack, $pars, $safeeval, $style_for_target);
470: }
471: } elsif ($token->[0] eq 'E') {
472: if ($Apache::lonxml::usestyle &&
473: exists($$style_for_target{'/'."$token->[1]"})) {
474: $Apache::lonxml::usestyle=0;
475: my $string=$$style_for_target{'/'.$token->[1]}.
476: '<LONCAPA_INTERNAL_TURN_STYLE_ON end="'.$token->[1].'" />';
477: &Apache::lonxml::newparser($pars,\$string);
478: $Apache::lonxml::style_values=$Apache::lonxml::style_end_values;
479: $Apache::lonxml::style_end_values='';
480: $dontpop=1;
481: } else {
482: #clear out any tags that didn't end
483: while ($token->[1] ne $$stack['-1'] && ($#$stack > -1)) {
484: my $lasttag=$$stack[-1];
485: if ($token->[1] =~ /^$lasttag$/i) {
486: &Apache::lonxml::warning('Using tag </'.$token->[1].'> on line '.$token->[3].' as end tag to <'.$$stack[-1].'>');
487: last;
488: } else {
489: &Apache::lonxml::warning('Found tag </'.$token->[1].'> on line '.$token->[3].' when looking for </'.$$stack[-1].'> in file');
490: &end_tag($stack,$parstack,$token);
491: }
492: }
493: $result = &callsub("end_$token->[1]", $target, $token, $stack,
494: $parstack, $pars,$safeeval, $style_for_target);
495: }
496: } else {
497: &Apache::lonxml::error("Unknown token event :$token->[0]:$token->[1]:");
498: }
499: #evaluate variable refs in result
500: if ($Apache::lonxml::post_evaluate &&$result ne "") {
501: my $extras;
502: if (!$Apache::lonxml::usestyle) {
503: $extras=$Apache::lonxml::style_values;
504: }
505: if ( $#$parstack > -1 ) {
506: $result=&Apache::run::evaluate($result,$safeeval,$extras.$$parstack[-1]);
507: } else {
508: $result= &Apache::run::evaluate($result,$safeeval,$extras);
509: }
510: }
511: $Apache::lonxml::post_evaluate=1;
512:
513: if (($token->[0] eq 'T') || ($token->[0] eq 'C') || ($token->[0] eq 'D') ) {
514: #Style file definitions should be correct
515: if ($target eq 'tex' && ($Apache::lonxml::usestyle)) {
516: $result=&latex_special_symbols($result);
517: }
518: }
519:
520: # Encode any high ASCII characters
521: # if (!$Apache::lonxml::prevent_entity_encode) {
522: # $result=&HTML::Entities::encode($result,"\200-\377");
523: # }
524: if ($Apache::lonxml::redirection) {
525: $Apache::lonxml::outputstack['-1'] .= $result;
526: } else {
527: $finaloutput.=$result;
528: }
529: $result = '';
530:
531: if ($token->[0] eq 'E' && !$dontpop) {
532: &end_tag($stack,$parstack,$token);
533: }
534: $dontpop=0;
535: }
536: if ($#$pars > -1) {
537: pop @$pars;
538: pop @Apache::lonxml::pwd;
539: }
540: }
541:
542: # if ($target eq 'meta') {
543: # $finaloutput.=&endredirection;
544: # }
545:
546:
547: if (($ENV{'QUERY_STRING'}) && ($target eq 'web')) {
548: $finaloutput=&afterburn($finaloutput);
549: }
550: return $finaloutput;
551: }
552:
553: sub callsub {
554: my ($sub,$target,$token,$tagstack,$parstack,$parser,$safeeval,$style)=@_;
555: my $currentstring='';
556: my $nodefault;
557: {
558: my $sub1;
559: no strict 'refs';
560: my $tag=$token->[1];
561: # get utterly rid of extended html tags
562: if ($tag=~/^x\-/i) { return ''; }
563: my $space=$Apache::lonxml::alltags{$tag}[-1];
564: if (!$space) {
565: $tag=~tr/A-Z/a-z/;
566: $sub=~tr/A-Z/a-z/;
567: $space=$Apache::lonxml::alltags{$tag}[-1]
568: }
569:
570: my $deleted=0;
571: $Apache::lonxml::curdepth=join('_',@Apache::lonxml::depthcounter);
572: if (($token->[0] eq 'S') && ($target eq 'modified')) {
573: $deleted=&Apache::edit::handle_delete($space,$target,$token,$tagstack,
574: $parstack,$parser,$safeeval,
575: $style);
576: }
577: if (!$deleted) {
578: if ($space) {
579: #&Apache::lonxml::debug("Calling sub $sub in $space $metamode");
580: $sub1="$space\:\:$sub";
581: ($currentstring,$nodefault) = &$sub1($target,$token,$tagstack,
582: $parstack,$parser,$safeeval,
583: $style);
584: } else {
585: #&Apache::lonxml::debug("NOT Calling sub $sub in $space $metamode");
586: if ($metamode <1) {
587: if (defined($token->[4]) && ($metamode < 1)) {
588: $currentstring = $token->[4];
589: } else {
590: $currentstring = $token->[2];
591: }
592: }
593: }
594: # &Apache::lonxml::debug("nodefalt:$nodefault:");
595: if ($currentstring eq '' && $nodefault eq '') {
596: if ($target eq 'edit') {
597: #&Apache::lonxml::debug("doing default edit for $token->[1]");
598: if ($token->[0] eq 'S') {
599: $currentstring = &Apache::edit::tag_start($target,$token);
600: } elsif ($token->[0] eq 'E') {
601: $currentstring = &Apache::edit::tag_end($target,$token);
602: }
603: } elsif ($target eq 'modified') {
604: if ($token->[0] eq 'S') {
605: $currentstring = $token->[4];
606: $currentstring.=&Apache::edit::handle_insert();
607: } elsif ($token->[0] eq 'E') {
608: $currentstring = $token->[2];
609: $currentstring.=&Apache::edit::handle_insertafter($token->[1]);
610: } else {
611: $currentstring = $token->[2];
612: }
613: }
614: }
615: }
616: use strict 'refs';
617: }
618: return $currentstring;
619: }
620:
621: sub setup_globals {
622: my ($request,$target)=@_;
623: $Apache::lonxml::request=$request;
624: $Apache::lonxml::registered = 0;
625: $errorcount=0;
626: $warningcount=0;
627: $Apache::lonxml::default_homework_loaded=0;
628: $Apache::lonxml::usestyle=1;
629: &init_counter();
630: @Apache::lonxml::pwd=();
631: @Apache::lonxml::extlinks=();
632: @Apache::lonxml::ssi_info=();
633: $Apache::lonxml::post_evaluate=1;
634: $Apache::lonxml::warnings_error_header='';
635: if ($target eq 'meta') {
636: $Apache::lonxml::redirection = 0;
637: $Apache::lonxml::metamode = 1;
638: $Apache::lonxml::evaluate = 1;
639: $Apache::lonxml::import = 0;
640: } elsif ($target eq 'answer') {
641: $Apache::lonxml::redirection = 0;
642: $Apache::lonxml::metamode = 1;
643: $Apache::lonxml::evaluate = 1;
644: $Apache::lonxml::import = 1;
645: } elsif ($target eq 'grade') {
646: &startredirection;
647: $Apache::lonxml::metamode = 0;
648: $Apache::lonxml::evaluate = 1;
649: $Apache::lonxml::import = 1;
650: } elsif ($target eq 'modified') {
651: $Apache::lonxml::redirection = 0;
652: $Apache::lonxml::metamode = 0;
653: $Apache::lonxml::evaluate = 0;
654: $Apache::lonxml::import = 0;
655: } elsif ($target eq 'edit') {
656: $Apache::lonxml::redirection = 0;
657: $Apache::lonxml::metamode = 0;
658: $Apache::lonxml::evaluate = 0;
659: $Apache::lonxml::import = 0;
660: } elsif ($target eq 'analyze') {
661: $Apache::lonxml::redirection = 0;
662: $Apache::lonxml::metamode = 0;
663: $Apache::lonxml::evaluate = 1;
664: $Apache::lonxml::import = 1;
665: } else {
666: $Apache::lonxml::redirection = 0;
667: $Apache::lonxml::metamode = 0;
668: $Apache::lonxml::evaluate = 1;
669: $Apache::lonxml::import = 1;
670: }
671: }
672:
673: sub init_safespace {
674: my ($target,$safeeval,$safehole,$safeinit) = @_;
675: $safeeval->permit("entereval");
676: $safeeval->permit(":base_math");
677: $safeeval->permit("sort");
678: $safeeval->permit("time");
679: $safeeval->deny(":base_io");
680: $safehole->wrap(\&Apache::scripttag::xmlparse,$safeeval,'&xmlparse');
681: $safehole->wrap(\&Apache::outputtags::multipart,$safeeval,'&multipart');
682: $safehole->wrap(\&Apache::lonnet::EXT,$safeeval,'&EXT');
683:
684: $safehole->wrap(\&Math::Cephes::asin,$safeeval,'&asin');
685: $safehole->wrap(\&Math::Cephes::acos,$safeeval,'&acos');
686: $safehole->wrap(\&Math::Cephes::atan,$safeeval,'&atan');
687: $safehole->wrap(\&Math::Cephes::sinh,$safeeval,'&sinh');
688: $safehole->wrap(\&Math::Cephes::cosh,$safeeval,'&cosh');
689: $safehole->wrap(\&Math::Cephes::tanh,$safeeval,'&tanh');
690: $safehole->wrap(\&Math::Cephes::asinh,$safeeval,'&asinh');
691: $safehole->wrap(\&Math::Cephes::acosh,$safeeval,'&acosh');
692: $safehole->wrap(\&Math::Cephes::atanh,$safeeval,'&atanh');
693: $safehole->wrap(\&Math::Cephes::erf,$safeeval,'&erf');
694: $safehole->wrap(\&Math::Cephes::erfc,$safeeval,'&erfc');
695: $safehole->wrap(\&Math::Cephes::j0,$safeeval,'&j0');
696: $safehole->wrap(\&Math::Cephes::j1,$safeeval,'&j1');
697: $safehole->wrap(\&Math::Cephes::jn,$safeeval,'&jn');
698: $safehole->wrap(\&Math::Cephes::jv,$safeeval,'&jv');
699: $safehole->wrap(\&Math::Cephes::y0,$safeeval,'&y0');
700: $safehole->wrap(\&Math::Cephes::y1,$safeeval,'&y1');
701: $safehole->wrap(\&Math::Cephes::yn,$safeeval,'&yn');
702: $safehole->wrap(\&Math::Cephes::yv,$safeeval,'&yv');
703:
704: $safehole->wrap(\&Math::Cephes::bdtr ,$safeeval,'&bdtr' );
705: $safehole->wrap(\&Math::Cephes::bdtrc ,$safeeval,'&bdtrc' );
706: $safehole->wrap(\&Math::Cephes::bdtri ,$safeeval,'&bdtri' );
707: $safehole->wrap(\&Math::Cephes::btdtr ,$safeeval,'&btdtr' );
708: $safehole->wrap(\&Math::Cephes::chdtr ,$safeeval,'&chdtr' );
709: $safehole->wrap(\&Math::Cephes::chdtrc,$safeeval,'&chdtrc');
710: $safehole->wrap(\&Math::Cephes::chdtri,$safeeval,'&chdtri');
711: $safehole->wrap(\&Math::Cephes::fdtr ,$safeeval,'&fdtr' );
712: $safehole->wrap(\&Math::Cephes::fdtrc ,$safeeval,'&fdtrc' );
713: $safehole->wrap(\&Math::Cephes::fdtri ,$safeeval,'&fdtri' );
714: $safehole->wrap(\&Math::Cephes::gdtr ,$safeeval,'&gdtr' );
715: $safehole->wrap(\&Math::Cephes::gdtrc ,$safeeval,'&gdtrc' );
716: $safehole->wrap(\&Math::Cephes::nbdtr ,$safeeval,'&nbdtr' );
717: $safehole->wrap(\&Math::Cephes::nbdtrc,$safeeval,'&nbdtrc');
718: $safehole->wrap(\&Math::Cephes::nbdtri,$safeeval,'&nbdtri');
719: $safehole->wrap(\&Math::Cephes::ndtr ,$safeeval,'&ndtr' );
720: $safehole->wrap(\&Math::Cephes::ndtri ,$safeeval,'&ndtri' );
721: $safehole->wrap(\&Math::Cephes::pdtr ,$safeeval,'&pdtr' );
722: $safehole->wrap(\&Math::Cephes::pdtrc ,$safeeval,'&pdtrc' );
723: $safehole->wrap(\&Math::Cephes::pdtri ,$safeeval,'&pdtri' );
724: $safehole->wrap(\&Math::Cephes::stdtr ,$safeeval,'&stdtr' );
725: $safehole->wrap(\&Math::Cephes::stdtri,$safeeval,'&stdtri');
726:
727: # $safehole->wrap(\&Math::Cephes::new_fract,$safeeval,'&new_fract');
728: # $safehole->wrap(\&Math::Cephes::radd,$safeeval,'&radd');
729: # $safehole->wrap(\&Math::Cephes::rsub,$safeeval,'&rsub');
730: # $safehole->wrap(\&Math::Cephes::rmul,$safeeval,'&rmul');
731: # $safehole->wrap(\&Math::Cephes::rdiv,$safeeval,'&rdiv');
732: # $safehole->wrap(\&Math::Cephes::euclid,$safeeval,'&euclid');
733:
734: $safehole->wrap(\&Math::Random::random_beta,$safeeval,'&math_random_beta');
735: $safehole->wrap(\&Math::Random::random_chi_square,$safeeval,'&math_random_chi_square');
736: $safehole->wrap(\&Math::Random::random_exponential,$safeeval,'&math_random_exponential');
737: $safehole->wrap(\&Math::Random::random_f,$safeeval,'&math_random_f');
738: $safehole->wrap(\&Math::Random::random_gamma,$safeeval,'&math_random_gamma');
739: $safehole->wrap(\&Math::Random::random_multivariate_normal,$safeeval,'&math_random_multivariate_normal');
740: $safehole->wrap(\&Math::Random::random_multinomial,$safeeval,'&math_random_multinomial');
741: $safehole->wrap(\&Math::Random::random_noncentral_chi_square,$safeeval,'&math_random_noncentral_chi_square');
742: $safehole->wrap(\&Math::Random::random_noncentral_f,$safeeval,'&math_random_noncentral_f');
743: $safehole->wrap(\&Math::Random::random_normal,$safeeval,'&math_random_normal');
744: $safehole->wrap(\&Math::Random::random_permutation,$safeeval,'&math_random_permutation');
745: $safehole->wrap(\&Math::Random::random_permuted_index,$safeeval,'&math_random_permuted_index');
746: $safehole->wrap(\&Math::Random::random_uniform,$safeeval,'&math_random_uniform');
747: $safehole->wrap(\&Math::Random::random_poisson,$safeeval,'&math_random_poisson');
748: $safehole->wrap(\&Math::Random::random_uniform_integer,$safeeval,'&math_random_uniform_integer');
749: $safehole->wrap(\&Math::Random::random_negative_binomial,$safeeval,'&math_random_negative_binomial');
750: $safehole->wrap(\&Math::Random::random_binomial,$safeeval,'&math_random_binomial');
751: $safehole->wrap(\&Math::Random::random_seed_from_phrase,$safeeval,'&random_seed_from_phrase');
752: $safehole->wrap(\&Math::Random::random_set_seed_from_phrase,$safeeval,'&random_set_seed_from_phrase');
753: $safehole->wrap(\&Math::Random::random_get_seed,$safeeval,'&random_get_seed');
754: $safehole->wrap(\&Math::Random::random_set_seed,$safeeval,'&random_set_seed');
755: $safehole->wrap(\&Apache::lonxml::error,$safeeval,'&LONCAPA_INTERNAL_ERROR');
756: $safehole->wrap(\&Apache::lonxml::debug,$safeeval,'&LONCAPA_INTERNAL_DEBUG');
757:
758: #need to inspect this class of ops
759: # $safeeval->deny(":base_orig");
760: $safeinit .= ';$external::target="'.$target.'";';
761: my $rndseed;
762: my ($symb,$courseid,$domain,$name) = &Apache::lonxml::whichuser();
763: $rndseed=&Apache::lonnet::rndseed($symb,$courseid,$domain,$name);
764: $safeinit .= ';$external::randomseed='.$rndseed.';';
765: &Apache::lonxml::debug("Setting rndseed to $rndseed");
766: &Apache::run::run($safeinit,$safeeval);
767:
768: my $subroutine=<<'EVALUATESUB';
769: sub __LC_INTERNAL_EVALUATE__ {
770: my ($__LC__a,$__LC__b,$__LC__c)=@_;
771: my $__LC__prefix;
772: while(1){
773: {
774: use strict;
775: no strict "vars";
776: if (eval(defined(eval($__LC__a.$__LC__b)))) {
777: return $__LC__prefix.eval($__LC__a.$__LC__b.$__LC__c);
778: }
779: }
780: $__LC__prefix.=substr($__LC__a,0,1,"");
781: if ($__LC__a!~/^(\$|&|\#)/) { last; }
782: }
783: return $__LC__prefix.$__LC__a.$__LC__b.$__LC__c;
784: }
785: EVALUATESUB
786: $safeeval->permit("require");
787: $safeeval->reval($subroutine);
788: $safeeval->deny("require");
789: }
790:
791: sub default_homework_load {
792: my ($safeeval)=@_;
793: &Apache::lonxml::debug('Loading default_homework');
794: my $default=&Apache::lonnet::getfile('/home/httpd/html/res/adm/includes/default_homework.lcpm');
795: if ($default eq -1) {
796: &Apache::lonxml::error("<b>Unable to find <i>default_homework.lcpm</i></b>");
797: } else {
798: &Apache::run::run($default,$safeeval);
799: $Apache::lonxml::default_homework_loaded=1;
800: }
801: }
802:
803: sub startredirection {
804: $Apache::lonxml::redirection++;
805: push (@Apache::lonxml::outputstack, '');
806: }
807:
808: sub endredirection {
809: if (!$Apache::lonxml::redirection) {
810: &Apache::lonxml::error("Endredirection was called, before a startredirection, perhaps you have unbalanced tags. Some debuging information:".join ":",caller);
811: return '';
812: }
813: $Apache::lonxml::redirection--;
814: pop @Apache::lonxml::outputstack;
815: }
816:
817: sub end_tag {
818: my ($tagstack,$parstack,$token)=@_;
819: pop(@$tagstack);
820: pop(@$parstack);
821: &decreasedepth($token);
822: }
823:
824: sub initdepth {
825: @Apache::lonxml::depthcounter=();
826: $Apache::lonxml::depth=-1;
827: $Apache::lonxml::olddepth=-1;
828: }
829:
830: sub increasedepth {
831: my ($token) = @_;
832: $Apache::lonxml::depth++;
833: $Apache::lonxml::depthcounter[$Apache::lonxml::depth]++;
834: if ($Apache::lonxml::depthcounter[$Apache::lonxml::depth]==1) {
835: $Apache::lonxml::olddepth=$Apache::lonxml::depth;
836: }
837: my $curdepth=join('_',@Apache::lonxml::depthcounter);
838: &Apache::lonxml::debug("s $Apache::lonxml::depth : $Apache::lonxml::olddepth : $curdepth : $token->[1]\n");
839: #print "<br />s $Apache::lonxml::depth : $Apache::lonxml::olddepth : $curdepth : $token->[1]\n";
840: }
841:
842: sub decreasedepth {
843: my ($token) = @_;
844: $Apache::lonxml::depth--;
845: if ($Apache::lonxml::depth<$Apache::lonxml::olddepth-1) {
846: $#Apache::lonxml::depthcounter--;
847: $Apache::lonxml::olddepth=$Apache::lonxml::depth+1;
848: }
849: if ( $Apache::lonxml::depth < -1) {
850: &Apache::lonxml::warning(&mt("Missing tags, unable to properly run file."));
851: $Apache::lonxml::depth='-1';
852: }
853: my $curdepth=join('_',@Apache::lonxml::depthcounter);
854: &Apache::lonxml::debug("e $Apache::lonxml::depth : $Apache::lonxml::olddepth : $token->[1] : $curdepth\n");
855: #print "<br />e $Apache::lonxml::depth : $Apache::lonxml::olddepth : $token->[1] : $curdepth\n";
856: }
857:
858: sub get_all_text_unbalanced {
859: #there is a copy of this in lonpublisher.pm
860: my($tag,$pars)= @_;
861: my $token;
862: my $result='';
863: $tag='<'.$tag.'>';
864: while ($token = $$pars[-1]->get_token) {
865: if (($token->[0] eq 'T')||($token->[0] eq 'C')||($token->[0] eq 'D')) {
866: $result.=$token->[1];
867: } elsif ($token->[0] eq 'PI') {
868: $result.=$token->[2];
869: } elsif ($token->[0] eq 'S') {
870: $result.=$token->[4];
871: } elsif ($token->[0] eq 'E') {
872: $result.=$token->[2];
873: }
874: if ($result =~ /(.*)\Q$tag\E(.*)/s) {
875: &Apache::lonxml::debug('Got a winner with leftovers ::'.$2);
876: &Apache::lonxml::debug('Result is :'.$1);
877: $result=$1;
878: my $redo=$tag.$2;
879: &Apache::lonxml::newparser($pars,\$redo);
880: last;
881: }
882: }
883: return $result
884: }
885:
886: sub increment_counter {
887: my ($increment) = @_;
888: if (defined($increment) && $increment gt 0) {
889: $Apache::lonxml::counter+=$increment;
890: } else {
891: $Apache::lonxml::counter++;
892: }
893: $Apache::lonxml::counter_changed=1;
894: }
895:
896: sub init_counter {
897: if (defined($ENV{'form.counter'})) {
898: $Apache::lonxml::counter=$ENV{'form.counter'};
899: $Apache::lonxml::counter_changed=0;
900: } else {
901: $Apache::lonxml::counter=1;
902: $Apache::lonxml::counter_changed=1;
903: }
904: }
905:
906: sub store_counter {
907: &Apache::lonnet::appenv(('form.counter' => $Apache::lonxml::counter));
908: return '';
909: }
910:
911: sub get_all_text {
912: my($tag,$pars,$style)= @_;
913: my $gotfullstack=1;
914: if (ref($pars) ne 'ARRAY') {
915: $gotfullstack=0;
916: $pars=[$pars];
917: }
918: if (ref($style) ne 'HASH') {
919: $style={};
920: }
921: my $depth=0;
922: my $token;
923: my $result='';
924: if ( $tag =~ m:^/: ) {
925: my $tag=substr($tag,1);
926: #&Apache::lonxml::debug("have:$tag:");
927: my $top_empty=0;
928: while (($depth >=0) && ($#$pars > -1) && (!$top_empty)) {
929: while (($depth >=0) && ($token = $$pars[-1]->get_token)) {
930: #&Apache::lonxml::debug("e token:$token->[0]:$depth:$token->[1]:".$#$pars.":".$#Apache::lonxml::pwd);
931: if (($token->[0] eq 'T')||($token->[0] eq 'C')||($token->[0] eq 'D')) {
932: $result.=$token->[1];
933: } elsif ($token->[0] eq 'PI') {
934: $result.=$token->[2];
935: } elsif ($token->[0] eq 'S') {
936: if ($token->[1] =~ /^$tag$/i) { $depth++; }
937: if ($token->[1] =~ /^LONCAPA_INTERNAL_TURN_STYLE_ON$/i) { $Apache::lonxml::usestyle=1; }
938: if ($token->[1] =~ /^LONCAPA_INTERNAL_TURN_STYLE_OFF$/i) { $Apache::lonxml::usestyle=0; }
939: $result.=$token->[4];
940: } elsif ($token->[0] eq 'E') {
941: if ( $token->[1] =~ /^$tag$/i) { $depth--; }
942: #skip sending back the last end tag
943: if ($depth == 0 && exists($$style{'/'.$token->[1]}) && $Apache::lonxml::usestyle) {
944: my $string=
945: '<LONCAPA_INTERNAL_TURN_STYLE_OFF end="yes" />'.
946: $$style{'/'.$token->[1]}.
947: $token->[2].
948: '<LONCAPA_INTERNAL_TURN_STYLE_ON />';
949: &Apache::lonxml::newparser($pars,\$string);
950: #&Apache::lonxml::debug("reParsing $string");
951: next;
952: }
953: if ($depth > -1) {
954: $result.=$token->[2];
955: } else {
956: $$pars[-1]->unget_token($token);
957: }
958: }
959: }
960: if (($depth >=0) && ($#$pars == 0) ) { $top_empty=1; }
961: if (($depth >=0) && ($#$pars > 0) ) {
962: pop(@$pars);
963: pop(@Apache::lonxml::pwd);
964: }
965: }
966: if ($top_empty && $depth >= 0) {
967: #never found the end tag ran out of text, throw error send back blank
968: &error('Never found end tag for <'.$tag.
969: '> current string <pre>'.
970: &HTML::Entities::encode($result).
971: '</pre>');
972: if ($gotfullstack) {
973: my $newstring='</'.$tag.'>'.$result;
974: &Apache::lonxml::newparser($pars,\$newstring);
975: }
976: $result='';
977: }
978: } else {
979: while ($#$pars > -1) {
980: while ($token = $$pars[-1]->get_token) {
981: #&Apache::lonxml::debug("s token:$token->[0]:$depth:$token->[1]");
982: if (($token->[0] eq 'T')||($token->[0] eq 'C')||
983: ($token->[0] eq 'D')) {
984: $result.=$token->[1];
985: } elsif ($token->[0] eq 'PI') {
986: $result.=$token->[2];
987: } elsif ($token->[0] eq 'S') {
988: if ( $token->[1] =~ /^$tag$/i) {
989: $$pars[-1]->unget_token($token); last;
990: } else {
991: $result.=$token->[4];
992: }
993: if ($token->[1] =~ /^LONCAPA_INTERNAL_TURN_STYLE_ON$/i) { $Apache::lonxml::usestyle=1; }
994: if ($token->[1] =~ /^LONCAPA_INTERNAL_TURN_STYLE_OFF$/i) { $Apache::lonxml::usestyle=0; }
995: } elsif ($token->[0] eq 'E') {
996: $result.=$token->[2];
997: }
998: }
999: if (($#$pars > 0) ) {
1000: pop(@$pars);
1001: pop(@Apache::lonxml::pwd);
1002: } else { last; }
1003: }
1004: }
1005: #&Apache::lonxml::debug("Exit:$result:");
1006: return $result
1007: }
1008:
1009: sub newparser {
1010: my ($parser,$contentref,$dir) = @_;
1011: push (@$parser,HTML::LCParser->new($contentref));
1012: $$parser['-1']->xml_mode('1');
1013: if ( $dir eq '' ) {
1014: push (@Apache::lonxml::pwd, $Apache::lonxml::pwd[$#Apache::lonxml::pwd]);
1015: } else {
1016: push (@Apache::lonxml::pwd, $dir);
1017: }
1018: }
1019:
1020: sub parstring {
1021: my ($token) = @_;
1022: my $temp='';
1023: foreach (@{$token->[3]}) {
1024: unless ($_=~/\W/) {
1025: my $val=$token->[2]->{$_};
1026: $val =~ s/([\%\@\\\"\'])/\\$1/g;
1027: #if ($val =~ m/^[\%\@]/) { $val="\\".$val; }
1028: $temp .= "my \$$_=\"$val\";";
1029: }
1030: }
1031: return $temp;
1032: }
1033:
1034: sub writeallows {
1035: unless ($#extlinks>=0) { return; }
1036: my $thisurl='/res/'.&Apache::lonnet::declutter(shift);
1037: if ($ENV{'httpref.'.$thisurl}) {
1038: $thisurl=$ENV{'httpref.'.$thisurl};
1039: }
1040: my $thisdir=$thisurl;
1041: $thisdir=~s/\/[^\/]+$//;
1042: my %httpref=();
1043: foreach (@extlinks) {
1044: $httpref{'httpref.'.
1045: &Apache::lonnet::hreflocation($thisdir,$_)}=$thisurl;
1046: }
1047: @extlinks=();
1048: &Apache::lonnet::appenv(%httpref);
1049: }
1050:
1051: sub register_ssi {
1052: my ($url,%form)=@_;
1053: push (@Apache::lonxml::ssi_info,{'url'=>$url,'form'=>\%form});
1054: return '';
1055: }
1056:
1057: sub do_registered_ssi {
1058: foreach my $info (@Apache::lonxml::ssi_info) {
1059: my %form=%{ $info->{'form'}};
1060: my $url=$info->{'url'};
1061: &Apache::lonnet::ssi($url,%form);
1062: }
1063: }
1064: #
1065: # Afterburner handles anchors, highlights and links
1066: #
1067: sub afterburn {
1068: my $result=shift;
1069: &Apache::loncommon::get_unprocessed_cgi($ENV{'QUERY_STRING'},
1070: ['highlight','anchor','link']);
1071: if ($ENV{'form.highlight'}) {
1072: foreach (split(/\,/,$ENV{'form.highlight'})) {
1073: my $anchorname=$_;
1074: my $matchthis=$anchorname;
1075: $matchthis=~s/\_+/\\s\+/g;
1076: $result=~s/($matchthis)/\<font color=\"red\"\>$1\<\/font\>/gs;
1077: }
1078: }
1079: if ($ENV{'form.link'}) {
1080: foreach (split(/\,/,$ENV{'form.link'})) {
1081: my ($anchorname,$linkurl)=split(/\>/,$_);
1082: my $matchthis=$anchorname;
1083: $matchthis=~s/\_+/\\s\+/g;
1084: $result=~s/($matchthis)/\<a href=\"$linkurl\"\>$1\<\/a\>/gs;
1085: }
1086: }
1087: if ($ENV{'form.anchor'}) {
1088: my $anchorname=$ENV{'form.anchor'};
1089: my $matchthis=$anchorname;
1090: $matchthis=~s/\_+/\\s\+/g;
1091: $result=~s/($matchthis)/\<a name=\"$anchorname\"\>$1\<\/a\>/s;
1092: $result.=(<<"ENDSCRIPT");
1093: <script type="text/javascript">
1094: document.location.hash='$anchorname';
1095: </script>
1096: ENDSCRIPT
1097: }
1098: return $result;
1099: }
1100:
1101: sub storefile {
1102: my ($file,$contents)=@_;
1103: &Apache::lonnet::correct_line_ends(\$contents);
1104: if (my $fh=Apache::File->new('>'.$file)) {
1105: print $fh $contents;
1106: $fh->close();
1107: return 1;
1108: } else {
1109: &warning("Unable to save file $file");
1110: return 0;
1111: }
1112: }
1113:
1114: sub createnewhtml {
1115: my $filecontents=(<<SIMPLECONTENT);
1116: <html>
1117: <head>
1118: <title>
1119: Title of Document Goes Here
1120: </title>
1121: </head>
1122: <body bgcolor="#FFFFFF">
1123:
1124: Body of Document Goes Here
1125:
1126: </body>
1127: </html>
1128: SIMPLECONTENT
1129: return $filecontents;
1130: }
1131:
1132: sub createnewsty {
1133: my $filecontents=(<<SIMPLECONTENT);
1134: <definetag name="">
1135: <render>
1136: <web></web>
1137: <tex></tex>
1138: </render>
1139: </definetag>
1140: SIMPLECONTENT
1141: return $filecontents;
1142: }
1143:
1144:
1145: sub inserteditinfo {
1146: my ($result,$filecontents,$filetype)=@_;
1147: $filecontents = &HTML::Entities::encode($filecontents);
1148: # my $editheader='<a href="#editsection">Edit below</a><hr />';
1149: my $xml_help = '';
1150: if ($filetype eq 'html') {
1151: $xml_help=Apache::loncommon::helpLatexCheatsheet();
1152: }
1153: my $cleanbut = '';
1154: if ($filetype eq 'html') {
1155: $cleanbut='<input type="submit" name="attemptclean" value="'.
1156: &mt('Save and then attempt to clean HTML').'" />';
1157: }
1158: my $titledisplay=&display_title();
1159: my %lt=&Apache::lonlocal::texthash('st' => 'Save this',
1160: 'vi' => 'View',
1161: 'ed' => 'Edit');
1162: my $buttons=(<<BUTTONS);
1163: $cleanbut
1164: <input type="submit" name="savethisfile" accesskey="s" value="$lt{'st'}" />
1165: <input type="submit" name="viewmode" accesskey="v" value="$lt{'vi'}" />
1166: BUTTONS
1167: my $editfooter=(<<ENDFOOTER);
1168: <hr />
1169: <a name="editsection" />
1170: <form method="post">
1171: $xml_help
1172: <input type="hidden" name="editmode" value="$lt{'ed'}" />
1173: $buttons<br />
1174: <textarea cols="80" rows="40" name="filecont">$filecontents</textarea>
1175: <br />$buttons
1176: <br />
1177: </form>
1178: $titledisplay
1179: ENDFOOTER
1180: # $result=~s/(\<body[^\>]*\>)/$1$editheader/is;
1181: $result=~s/(\<\/body\>)/$editfooter/is;
1182: return $result;
1183: }
1184:
1185: sub get_target {
1186: my $viewgrades=&Apache::lonnet::allowed('vgr',$ENV{'request.course.id'});
1187: if ( $ENV{'request.state'} eq 'published') {
1188: if ( defined($ENV{'form.grade_target'})
1189: && ($viewgrades == 'F' )) {
1190: return ($ENV{'form.grade_target'});
1191: } elsif (defined($ENV{'form.grade_target'})) {
1192: if (($ENV{'form.grade_target'} eq 'web') ||
1193: ($ENV{'form.grade_target'} eq 'tex') ) {
1194: return $ENV{'form.grade_target'}
1195: } else {
1196: return 'web';
1197: }
1198: } else {
1199: return 'web';
1200: }
1201: } elsif ($ENV{'request.state'} eq 'construct') {
1202: if ( defined($ENV{'form.grade_target'})) {
1203: return ($ENV{'form.grade_target'});
1204: } else {
1205: return 'web';
1206: }
1207: } else {
1208: return 'web';
1209: }
1210: }
1211:
1212: sub handler {
1213: my $request=shift;
1214:
1215: my $target=&get_target();
1216:
1217: $Apache::lonxml::debug=$ENV{'user.debug'};
1218:
1219: if ($ENV{'browser.mathml'}) {
1220: &Apache::loncommon::content_type($request,'text/xml');
1221: } else {
1222: &Apache::loncommon::content_type($request,'text/html');
1223: }
1224: &Apache::loncommon::no_cache($request);
1225: $request->send_http_header;
1226:
1227: return OK if $request->header_only;
1228:
1229:
1230: my $file=&Apache::lonnet::filelocation("",$request->uri);
1231: my $filetype;
1232: if ($file =~ /\.sty$/) {
1233: $filetype='sty';
1234: } else {
1235: $filetype='html';
1236: }
1237: #
1238: # Edit action? Save file.
1239: #
1240: unless ($ENV{'request.state'} eq 'published') {
1241: if (($ENV{'form.savethisfile'}) || ($ENV{'form.attemptclean'})) {
1242: if (&storefile($file,$ENV{'form.filecont'})) {
1243: &Apache::lonxml::info("<font COLOR=\"#0000FF\">".
1244: &mt('Updated').": ".
1245: &Apache::lonlocal::locallocaltime(time).
1246: " </font>");
1247: }
1248: }
1249: }
1250: my %mystyle;
1251: my $result = '';
1252: my $filecontents=&Apache::lonnet::getfile($file);
1253: if ($filecontents eq -1) {
1254: my $bodytag=&Apache::loncommon::bodytag('File Error');
1255: my $fnf=&mt('File not found');
1256: $result=(<<ENDNOTFOUND);
1257: <html>
1258: <head>
1259: <title>$fnf</title>
1260: </head>
1261: $bodytag
1262: <b>$fnf: $file</b>
1263: </body>
1264: </html>
1265: ENDNOTFOUND
1266: $filecontents='';
1267: if ($ENV{'request.state'} ne 'published') {
1268: if ($filetype eq 'sty') {
1269: $filecontents=&createnewsty();
1270: } else {
1271: $filecontents=&createnewhtml();
1272: }
1273: $ENV{'form.editmode'}='Edit'; #force edit mode
1274: }
1275: } else {
1276: unless ($ENV{'request.state'} eq 'published') {
1277: if ($ENV{'form.attemptclean'}) {
1278: $filecontents=&htmlclean($filecontents,1);
1279: }
1280: #
1281: # we are in construction space, see if edit mode forced
1282: &Apache::loncommon::get_unprocessed_cgi
1283: ($ENV{'QUERY_STRING'},['editmode']);
1284: }
1285: if (!$ENV{'form.editmode'} || $ENV{'form.viewmode'}) {
1286: $result = &Apache::lonxml::xmlparse($request,$target,$filecontents,
1287: '',%mystyle);
1288: }
1289: }
1290:
1291: #
1292: # Edit action? Insert editing commands
1293: #
1294: unless ($ENV{'request.state'} eq 'published') {
1295: if ($ENV{'form.editmode'} && (!($ENV{'form.viewmode'}))) {
1296: my $displayfile=$request->uri;
1297: $displayfile=~s/^\/[^\/]*//;
1298: $result='<html><body bgcolor="#FFFFFF">'.
1299: &Apache::lonxml::message_location().'<h3>'.
1300: $displayfile.
1301: '</h3></body></html>';
1302: $result=&inserteditinfo($result,$filecontents,$filetype);
1303: }
1304: }
1305: if ($filetype eq 'html') { writeallows($request->uri); }
1306:
1307:
1308: &Apache::lonxml::add_messages(\$result);
1309: $request->print($result);
1310:
1311: return OK;
1312: }
1313:
1314: sub display_title {
1315: my $result;
1316: if ($ENV{'request.state'} eq 'construct') {
1317: my $title=&Apache::lonnet::gettitle();
1318: if (!defined($title) || $title eq '') {
1319: $title = $ENV{'request.filename'};
1320: $title = substr($title, rindex($title, '/') + 1);
1321: }
1322: $result = "<script type='text/javascript'>top.document.title = '$title - LON-CAPA Construction Space';</script>";
1323: }
1324: return $result;
1325: }
1326:
1327: sub debug {
1328: if ($Apache::lonxml::debug eq "1") {
1329: $|=1;
1330: my $request=$Apache::lonxml::request;
1331: if (!$request) { $request=Apache->request; }
1332: $request->print('<font size="-2"><pre>DEBUG:'.&HTML::Entities::encode($_[0])."</pre></font>\n");
1333: }
1334: }
1335:
1336: sub error {
1337: $errorcount++;
1338: my $request=$Apache::lonxml::request;
1339: if (!$request) { $request=Apache->request; }
1340: if (($Apache::lonxml::debug eq 1) || ($ENV{'request.state'} eq 'construct') ) {
1341: # If printing in construction space, put the error inside <pre></pre>
1342: push(@Apache::lonxml::error_messages,
1343: $Apache::lonxml::warnings_error_header.
1344: "<b>ERROR:</b>".join("<br />\n",@_)."<br />\n");
1345: $Apache::lonxml::warnings_error_header='';
1346: } else {
1347: push(@Apache::lonxml::error_messages,
1348: "<b>An Error occured while processing this resource. The instructor has been notified.</b> <br />");
1349: #notify author
1350: &Apache::lonmsg::author_res_msg($ENV{'request.filename'},join('<br />',@_));
1351: #notify course
1352: if ( $ENV{'request.course.id'} ) {
1353: my (undef,%users)=&Apache::lonfeedback::decide_receiver(undef,0,1,1,1);
1354: my $declutter=&Apache::lonnet::declutter($ENV{'request.filename'});
1355: foreach (keys %users) {
1356: my ($user,$domain) = split(/:/, $_);
1357: &Apache::lonmsg::user_normal_msg($user,$domain,
1358: "Error [$declutter]",join('<br />',@_));
1359: }
1360: }
1361: }
1362: }
1363:
1364: sub warning {
1365: $warningcount++;
1366:
1367: if ($ENV{'form.grade_target'} ne 'tex') {
1368: if ($ENV{'request.state'} eq 'construct' || $Apache::lonxml::debug) {
1369: my $request=$Apache::lonxml::request;
1370: if (!$request) { $request=Apache->request; }
1371: push(@Apache::lonxml::warning_messages,
1372: $Apache::lonxml::warnings_error_header.
1373: "<b>W</b>ARNING<b>:</b>".join('<br />',@_)."<br />\n");
1374: $Apache::lonxml::warnings_error_header='';
1375: }
1376: }
1377: }
1378:
1379: sub info {
1380: if ($ENV{'form.grade_target'} ne 'tex'
1381: && $ENV{'request.state'} eq 'construct') {
1382: push(@Apache::lonxml::info_messages,join('<br />',@_)."<br />\n");
1383: }
1384: }
1385:
1386: sub message_location {
1387: return '__LONCAPA_INTERNAL_MESSAGE_LOCATION__';
1388: }
1389:
1390: sub add_messages {
1391: my ($msg)=@_;
1392: my $result=join(' ',
1393: @Apache::lonxml::info_messages,
1394: @Apache::lonxml::error_messages,
1395: @Apache::lonxml::warning_messages);
1396: undef(@Apache::lonxml::info_messages);
1397: undef(@Apache::lonxml::error_messages);
1398: undef(@Apache::lonxml::warning_messages);
1399: $$msg=~s/__LONCAPA_INTERNAL_MESSAGE_LOCATION__/$result/;
1400: $$msg=~s/__LONCAPA_INTERNAL_MESSAGE_LOCATION__//g;
1401: }
1402:
1403: sub get_param {
1404: my ($param,$parstack,$safeeval,$context,$case_insensitive) = @_;
1405: if ( ! $context ) { $context = -1; }
1406: my $args ='';
1407: if ( $#$parstack > (-2-$context) ) { $args=$$parstack[$context]; }
1408: if ( ! $Apache::lonxml::usestyle ) {
1409: $args=$Apache::lonxml::style_values.$args;
1410: }
1411: if ( ! $args ) { return undef; }
1412: if ( $case_insensitive ) {
1413: if ($args =~ s/(my \$)(\Q$param\E)(=\")/$1.lc($2).$3/ei) {
1414: return &Apache::run::run("{$args;".'return $'.$param.'}',
1415: $safeeval); #'
1416: } else {
1417: return undef;
1418: }
1419: } else {
1420: if ( $args =~ /my \$\Q$param\E=\"/ ) {
1421: return &Apache::run::run("{$args;".'return $'.$param.'}',
1422: $safeeval); #'
1423: } else {
1424: return undef;
1425: }
1426: }
1427: }
1428:
1429: sub get_param_var {
1430: my ($param,$parstack,$safeeval,$context,$case_insensitive) = @_;
1431: if ( ! $context ) { $context = -1; }
1432: my $args ='';
1433: if ( $#$parstack > (-2-$context) ) { $args=$$parstack[$context]; }
1434: if ( ! $Apache::lonxml::usestyle ) {
1435: $args=$Apache::lonxml::style_values.$args;
1436: }
1437: &Apache::lonxml::debug("Args are $args param is $param");
1438: if ($case_insensitive) {
1439: if (! ($args=~s/(my \$)(\Q$param\E)(=\")/$1.lc($2).$3/ei)) {
1440: return undef;
1441: }
1442: } elsif ( $args !~ /my \$\Q$param\E=\"/ ) { return undef; }
1443: my $value=&Apache::run::run("{$args;".'return $'.$param.'}',$safeeval); #'
1444: &Apache::lonxml::debug("first run is $value");
1445: if ($value =~ /^[\$\@\%]\w+$/) {
1446: &Apache::lonxml::debug("doing second");
1447: my @result=&Apache::run::run("return $value",$safeeval,1);
1448: if (!defined($result[0])) {
1449: return $value
1450: } else {
1451: if (wantarray) { return @result; } else { return $result[0]; }
1452: }
1453: } else {
1454: return $value;
1455: }
1456: }
1457:
1458: sub register_insert {
1459: my @data = split /\n/, &Apache::lonnet::getfile('/home/httpd/lonTabs/insertlist.tab');
1460: my $i;
1461: my $tagnum=0;
1462: my @order;
1463: for ($i=0;$i < $#data; $i++) {
1464: my $line = $data[$i];
1465: if ( $line =~ /^\#/ || $line =~ /^\s*\n/) { next; }
1466: if ( $line =~ /TABLE/ ) { last; }
1467: my ($tag,$descrip,$color,$function,$show,$helpfile,$helpdesc) = split(/,/, $line);
1468: if ($tag) {
1469: $insertlist{"$tagnum.tag"} = $tag;
1470: $insertlist{"$tagnum.description"} = $descrip;
1471: $insertlist{"$tagnum.color"} = $color;
1472: $insertlist{"$tagnum.function"} = $function;
1473: if (!defined($show)) { $show='yes'; }
1474: $insertlist{"$tagnum.show"}= $show;
1475: $insertlist{"$tagnum.helpfile"} = $helpfile;
1476: $insertlist{"$tagnum.helpdesc"} = $helpdesc;
1477: $insertlist{"$tag.num"}=$tagnum;
1478: $tagnum++;
1479: }
1480: }
1481: $i++; #skipping TABLE line
1482: $tagnum = 0;
1483: for (;$i < $#data;$i++) {
1484: my $line = $data[$i];
1485: my ($mnemonic,@which) = split(/ +/,$line);
1486: my $tag = $insertlist{"$tagnum.tag"};
1487: for (my $j=0;$j <=$#which;$j++) {
1488: if ( $which[$j] eq 'Y' ) {
1489: if ($insertlist{"$j.show"} ne 'no') {
1490: push(@{ $insertlist{"$tag.which"} },$j);
1491: }
1492: }
1493: }
1494: $tagnum++;
1495: }
1496: }
1497:
1498: sub description {
1499: my ($token)=@_;
1500: my $tagnum;
1501: my $tag=$token->[1];
1502: foreach my $namespace (reverse @Apache::lonxml::namespace) {
1503: my $testtag=$namespace.'::'.$tag;
1504: $tagnum=$insertlist{"$testtag.num"};
1505: if (defined($tagnum)) { last; }
1506: }
1507: if (!defined ($tagnum)) { $tagnum=$Apache::lonxml::insertlist{"$tag.num"}; }
1508: return $insertlist{$tagnum.'.description'};
1509: }
1510:
1511: # Returns a list containing the help file, and the description
1512: sub helpinfo {
1513: my ($token)=@_;
1514: my $tagnum;
1515: my $tag=$token->[1];
1516: foreach my $namespace (reverse @Apache::lonxml::namespace) {
1517: my $testtag=$namespace.'::'.$tag;
1518: $tagnum=$insertlist{"$testtag.num"};
1519: if (defined($tagnum)) { last; }
1520: }
1521: if (!defined ($tagnum)) { $tagnum=$Apache::lonxml::insertlist{"$tag.num"}; }
1522: return ($insertlist{$tagnum.'.helpfile'}, $insertlist{$tagnum.'.helpdesc'});
1523: }
1524:
1525: # ----------------------------------------------------------------- whichuser
1526: # returns a list of $symb, $courseid, $domain, $name that is correct for
1527: # calls to lonnet functions for this setup.
1528: # - looks for form.grade_ parameters
1529: sub whichuser {
1530: my ($passedsymb)=@_;
1531: my ($symb,$courseid,$domain,$name,$publicuser);
1532: if (defined($ENV{'form.grade_symb'})) {
1533: my $tmp_courseid=$ENV{'form.grade_courseid'};
1534: my $allowed=&Apache::lonnet::allowed('vgr',$tmp_courseid);
1535: if ($allowed) {
1536: $symb=$ENV{'form.grade_symb'};
1537: $courseid=$ENV{'form.grade_courseid'};
1538: $domain=$ENV{'form.grade_domain'};
1539: $name=$ENV{'form.grade_username'};
1540: }
1541: } else {
1542: if (!$passedsymb) {
1543: $symb=&Apache::lonnet::symbread();
1544: } else {
1545: $symb=$passedsymb;
1546: }
1547: $courseid=$ENV{'request.course.id'};
1548: $domain=$ENV{'user.domain'};
1549: $name=$ENV{'user.name'};
1550: if ($name eq 'public' && $domain eq 'public') {
1551: if (!defined($ENV{'form.username'})) {
1552: $ENV{'form.username'}.=time.rand(10000000);
1553: }
1554: $name.=$ENV{'form.username'};
1555: }
1556: }
1557: return ($symb,$courseid,$domain,$name,$publicuser);
1558: }
1559:
1560: 1;
1561: __END__
1562:
1563:
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