1: # The LearningOnline Network with CAPA
2: # XML Parser Module
3: #
4: # $Id: lonxml.pm,v 1.317 2004/04/15 20:18:46 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:
40:
41: package Apache::lonxml;
42: use vars
43: qw(@pwd @outputstack $redirection $import @extlinks $metamode $evaluate %insertlist @namespace $errorcount $warningcount);
44: use strict;
45: use HTML::LCParser();
46: use HTML::TreeBuilder();
47: use HTML::Entities();
48: use Safe();
49: use Safe::Hole();
50: use Math::Cephes();
51: use Math::Random();
52: use Opcode();
53: use POSIX qw(strftime);
54:
55:
56: sub register {
57: my ($space,@taglist) = @_;
58: foreach my $temptag (@taglist) {
59: push(@{ $Apache::lonxml::alltags{$temptag} },$space);
60: }
61: }
62:
63: sub deregister {
64: my ($space,@taglist) = @_;
65: foreach my $temptag (@taglist) {
66: my $tempspace = $Apache::lonxml::alltags{$temptag}[-1];
67: if ($tempspace eq $space) {
68: pop(@{ $Apache::lonxml::alltags{$temptag} });
69: }
70: }
71: #&printalltags();
72: }
73:
74: use Apache::Constants qw(:common);
75: use Apache::lontexconvert();
76: use Apache::style();
77: use Apache::run();
78: use Apache::londefdef();
79: use Apache::scripttag();
80: use Apache::languagetags();
81: use Apache::edit();
82: use Apache::inputtags();
83: use Apache::outputtags();
84: use Apache::lonnet();
85: use Apache::File();
86: use Apache::loncommon();
87: use Apache::lonfeedback();
88: use Apache::lonmsg();
89: use Apache::loncacc();
90: use Apache::lonlocal;
91:
92: #================================================== Main subroutine: xmlparse
93: #debugging control, to turn on debugging modify the correct handler
94: $Apache::lonxml::debug=0;
95:
96: # keeps count of the number of warnings and errors generated in a parse
97: $warningcount=0;
98: $errorcount=0;
99:
100: #path to the directory containing the file currently being processed
101: @pwd=();
102:
103: #these two are used for capturing a subset of the output for later processing,
104: #don't touch them directly use &startredirection and &endredirection
105: @outputstack = ();
106: $redirection = 0;
107:
108: #controls wheter the <import> tag actually does
109: $import = 1;
110: @extlinks=();
111:
112: # meta mode is a bit weird only some output is to be turned off
113: #<output> tag turns metamode off (defined in londefdef.pm)
114: $metamode = 0;
115:
116: # turns on and of run::evaluate actually derefencing var refs
117: $evaluate = 1;
118:
119: # data structure for eidt mode, determines what tags can go into what other tags
120: %insertlist=();
121:
122: # stores the list of active tag namespaces
123: @namespace=();
124:
125: # has the dynamic menu been updated to know about this resource
126: $Apache::lonxml::registered=0;
127:
128: # a pointer the the Apache request object
129: $Apache::lonxml::request='';
130:
131: # a problem number counter, and check on ether it is used
132: $Apache::lonxml::counter=1;
133: $Apache::lonxml::counter_changed=0;
134:
135: #internal check on whether to look at style defs
136: $Apache::lonxml::usestyle=1;
137:
138: #locations used to store the parameter string for style substitutions
139: $Apache::lonxml::style_values='';
140: $Apache::lonxml::style_end_values='';
141:
142: #array of ssi calls that need to occur after we are done parsing
143: @Apache::lonxml::ssi_info=();
144:
145: #should we do the postag variable interpolation
146: $Apache::lonxml::post_evaluate=1;
147:
148: #a header message to emit in the case of any generated warning or errors
149: $Apache::lonxml::warnings_error_header='';
150:
151: sub xmlbegin {
152: my $output='';
153: if ($ENV{'browser.mathml'}) {
154: $output='<?xml version="1.0"?>'
155: .'<?xml-stylesheet type="text/css" href="/adm/MathML/mathml.css"?>'
156: .'<!DOCTYPE html SYSTEM "/adm/MathML/mathml.dtd" '
157: .'[<!ENTITY mathns "http://www.w3.org/1998/Math/MathML">]>'
158: .'<html xmlns:math="http://www.w3.org/1998/Math/MathML" '
159: .'xmlns="http://www.w3.org/TR/REC-html40">';
160: } else {
161: $output='<html>';
162: }
163: return $output;
164: }
165:
166: sub xmlend {
167: my $mode='xml';
168: my $status='OPEN';
169: if ($Apache::lonhomework::parsing_a_problem) {
170: $mode='problem';
171: $status=$Apache::inputtags::status[-1];
172: }
173: return &Apache::lonfeedback::list_discussion($mode,$status).'</html>';
174: }
175:
176: sub tokeninputfield {
177: my $defhost=$Apache::lonnet::perlvar{'lonHostID'};
178: $defhost=~tr/a-z/A-Z/;
179: return (<<ENDINPUTFIELD)
180: <script type="text/javascript">
181: function updatetoken() {
182: var comp=new Array;
183: var barcode=unescape(document.tokeninput.barcode.value);
184: comp=barcode.split('*');
185: if (typeof(comp[0])!="undefined") {
186: document.tokeninput.codeone.value=comp[0];
187: }
188: if (typeof(comp[1])!="undefined") {
189: document.tokeninput.codetwo.value=comp[1];
190: }
191: if (typeof(comp[2])!="undefined") {
192: comp[2]=comp[2].toUpperCase();
193: document.tokeninput.codethree.value=comp[2];
194: }
195: document.tokeninput.barcode.value='';
196: }
197: </script>
198: <form method="post" name="tokeninput">
199: <table border="2" bgcolor="#FFFFBB">
200: <tr><th>DocID Checkin</th></tr>
201: <tr><td>
202: <table>
203: <tr>
204: <td>Scan in Barcode</td>
205: <td><input type="text" size="22" name="barcode"
206: onChange="updatetoken()"/></td>
207: </tr>
208: <tr><td><i>or</i> Type in DocID</td>
209: <td>
210: <input type="text" size="5" name="codeone" />
211: <b><font size="+2">*</font></b>
212: <input type="text" size="5" name="codetwo" />
213: <b><font size="+2">*</font></b>
214: <input type="text" size="10" name="codethree" value="$defhost"
215: onChange="this.value=this.value.toUpperCase()" />
216: </td></tr>
217: </table>
218: </td></tr>
219: <tr><td><input type="submit" value="Check in DocID" /></td></tr>
220: </table>
221: </form>
222: ENDINPUTFIELD
223: }
224:
225: sub maketoken {
226: my ($symb,$tuname,$tudom,$tcrsid)=@_;
227: unless ($symb) {
228: $symb=&Apache::lonnet::symbread();
229: }
230: unless ($tuname) {
231: $tuname=$ENV{'user.name'};
232: $tudom=$ENV{'user.domain'};
233: $tcrsid=$ENV{'request.course.id'};
234: }
235:
236: return &Apache::lonnet::checkout($symb,$tuname,$tudom,$tcrsid);
237: }
238:
239: sub printtokenheader {
240: my ($target,$token,$tsymb,$tcrsid,$tudom,$tuname)=@_;
241: unless ($token) { return ''; }
242:
243: my ($symb,$courseid,$domain,$name) = &Apache::lonxml::whichuser();
244: unless ($tsymb) {
245: $tsymb=$symb;
246: }
247: unless ($tuname) {
248: $tuname=$name;
249: $tudom=$domain;
250: $tcrsid=$courseid;
251: }
252:
253: my %reply=&Apache::lonnet::get('environment',
254: ['firstname','middlename','lastname','generation'],
255: $tudom,$tuname);
256: my $plainname=$reply{'firstname'}.' '.
257: $reply{'middlename'}.' '.
258: $reply{'lastname'}.' '.
259: $reply{'generation'};
260:
261: if ($target eq 'web') {
262: my %idhash=&Apache::lonnet::idrget($tudom,($tuname));
263: return
264: '<img align="right" src="/cgi-bin/barcode.png?encode='.$token.'" />'.
265: &mt('Checked out for').' '.$plainname.
266: '<br />'.&mt('User').': '.$tuname.' at '.$tudom.
267: '<br />'.&mt('ID').': '.$idhash{$tuname}.
268: '<br />'.&mt('CourseID').': '.$tcrsid.
269: '<br />'.&mt('Course').': '.$ENV{'course.'.$tcrsid.'.description'}.
270: '<br />'.&mt('DocID').': '.$token.
271: '<br />'.&mt('Time').': '.&Apache::lonlocal::locallocaltime().'<hr />';
272: } else {
273: return $token;
274: }
275: }
276:
277: sub fontsettings() {
278: my $headerstring='';
279: if (($ENV{'browser.os'} eq 'mac') && (!$ENV{'browser.mathml'})) {
280: $headerstring.=
281: '<meta Content-Type="text/html; charset=x-mac-roman">';
282: } elsif (!$ENV{'browser.mathml'} && $ENV{'browser.unicode'}) {
283: $headerstring.=
284: '<meta http-equiv="Content-Type" content="text/html; charset=utf-8" />';
285: }
286: return $headerstring;
287: }
288:
289: sub printalltags {
290: my $temp;
291: foreach $temp (sort keys %Apache::lonxml::alltags) {
292: &Apache::lonxml::debug("$temp -- ".
293: join(',',@{ $Apache::lonxml::alltags{$temp} }));
294: }
295: }
296:
297: sub xmlparse {
298: my ($request,$target,$content_file_string,$safeinit,%style_for_target) = @_;
299:
300: &setup_globals($request,$target);
301: &Apache::inputtags::initialize_inputtags();
302: &Apache::outputtags::initialize_outputtags();
303: &Apache::edit::initialize_edit();
304: &Apache::londefdef::initialize_londefdef();
305:
306: #
307: # do we have a course style file?
308: #
309:
310: if ($ENV{'request.course.id'} && $ENV{'request.state'} ne 'construct') {
311: my $bodytext=
312: $ENV{'course.'.$ENV{'request.course.id'}.'.default_xml_style'};
313: if ($bodytext) {
314: my $location=&Apache::lonnet::filelocation('',$bodytext);
315: my $styletext=&Apache::lonnet::getfile($location);
316: if ($styletext ne '-1') {
317: %style_for_target = (%style_for_target,
318: &Apache::style::styleparser($target,$styletext));
319: }
320: }
321: } elsif ($ENV{'construct.style'} && ($ENV{'request.state'} eq 'construct')) {
322: my $location=&Apache::lonnet::filelocation('',$ENV{'construct.style'});
323: my $styletext=&Apache::lonnet::getfile($location);
324: if ($styletext ne '-1') {
325: %style_for_target = (%style_for_target,
326: &Apache::style::styleparser($target,$styletext));
327: }
328: }
329: #&printalltags();
330: my @pars = ();
331: my $pwd=$ENV{'request.filename'};
332: $pwd =~ s:/[^/]*$::;
333: &newparser(\@pars,\$content_file_string,$pwd);
334:
335: my $safeeval = new Safe;
336: my $safehole = new Safe::Hole;
337: &init_safespace($target,$safeeval,$safehole,$safeinit);
338: #-------------------- Redefinition of the target in the case of compound target
339:
340: ($target, my @tenta) = split('&&',$target);
341:
342: my @stack = ();
343: my @parstack = ();
344: &initdepth;
345:
346: my $finaloutput = &inner_xmlparse($target,\@stack,\@parstack,\@pars,
347: $safeeval,\%style_for_target);
348:
349: if ($ENV{'request.uri'}) {
350: &writeallows($ENV{'request.uri'});
351: }
352: &do_registered_ssi();
353: if ($Apache::lonxml::counter_changed) { &store_counter() }
354: return $finaloutput;
355: }
356:
357: sub htmlclean {
358: my ($raw,$full)=@_;
359:
360: my $tree = HTML::TreeBuilder->new;
361: $tree->ignore_unknown(0);
362:
363: $tree->parse($raw);
364:
365: my $output= $tree->as_HTML(undef,' ');
366:
367: $output=~s/\<(br|hr|img|meta|allow)(.*?)\>/\<$1$2 \/\>/gis;
368: $output=~s/\<\/(br|hr|img|meta|allow)\>//gis;
369: unless ($full) {
370: $output=~s/\<[\/]*(body|head|html)\>//gis;
371: }
372:
373: $tree = $tree->delete;
374:
375: return $output;
376: }
377:
378: sub latex_special_symbols {
379: my ($string,$where)=@_;
380: if ($where eq 'header') {
381: $string =~ s/(\\|_|\^)/ /g;
382: $string =~ s/(\$|%|\{|\})/\\$1/g;
383: $string =~ s/_/ /g;
384: $string=&Apache::lonprintout::character_chart($string);
385: # any & or # leftover should be safe to just escape
386: $string=~s/([^\\])\&/$1\\\&/g;
387: $string=~s/([^\\])\#/$1\\\#/g;
388: } else {
389: $string=~s/\\/\\ensuremath{\\backslash}/g;
390: $string=~s/([^\\]|^)\%/$1\\\%/g;
391: $string=~s/([^\\]|^)(\$|_)/$1\\$2/g;
392: $string=~s/\$\$/\$\\\$/g;
393: $string=~s/\#\#/\#\\\#/g;
394: $string=~s/([^\\]|^)(\~|\^)/$1\\$2\\strut /g;
395: $string=~s/(>|<)/\\ensuremath\{$1\}/g; #more or less
396: $string=&Apache::lonprintout::character_chart($string);
397: # any & or # leftover should be safe to just escape
398: $string=~s/([^\\]|^)\&/$1\\\&/g;
399: $string=~s/([^\\]|^)\#/$1\\\#/g;
400: #single { or } How to escape?
401: }
402: return $string;
403: }
404:
405: sub inner_xmlparse {
406: my ($target,$stack,$parstack,$pars,$safeeval,$style_for_target)=@_;
407: my $finaloutput = '';
408: my $result;
409: my $token;
410: my $dontpop=0;
411: while ( $#$pars > -1 ) {
412: while ($token = $$pars['-1']->get_token) {
413: if (($token->[0] eq 'T') || ($token->[0] eq 'C') ) {
414: if ($metamode<1) {
415: my $text=$token->[1];
416: if ($token->[0] eq 'C' && $target eq 'tex') {
417: $text = '';
418: # $text = '%'.$text."\n";
419: }
420: $result.=$text;
421: }
422: } elsif (($token->[0] eq 'D')) {
423: if ($metamode<1 && $target eq 'web') {
424: my $text=$token->[1];
425: $result.=$text;
426: }
427: } elsif ($token->[0] eq 'PI') {
428: if ($metamode<1 && $target eq 'web') {
429: $result=$token->[2];
430: }
431: } elsif ($token->[0] eq 'S') {
432: # add tag to stack
433: push (@$stack,$token->[1]);
434: # add parameters list to another stack
435: push (@$parstack,&parstring($token));
436: &increasedepth($token);
437: if ($Apache::lonxml::usestyle &&
438: exists($$style_for_target{$token->[1]})) {
439: $Apache::lonxml::usestyle=0;
440: my $string=$$style_for_target{$token->[1]}.
441: '<LONCAPA_INTERNAL_TURN_STYLE_ON />';
442: &Apache::lonxml::newparser($pars,\$string);
443: $Apache::lonxml::style_values=$$parstack[-1];
444: $Apache::lonxml::style_end_values=$$parstack[-1];
445: } else {
446: $result = &callsub("start_$token->[1]", $target, $token, $stack,
447: $parstack, $pars, $safeeval, $style_for_target);
448: }
449: } elsif ($token->[0] eq 'E') {
450: if ($Apache::lonxml::usestyle &&
451: exists($$style_for_target{'/'."$token->[1]"})) {
452: $Apache::lonxml::usestyle=0;
453: my $string=$$style_for_target{'/'.$token->[1]}.
454: '<LONCAPA_INTERNAL_TURN_STYLE_ON end="'.$token->[1].'" />';
455: &Apache::lonxml::newparser($pars,\$string);
456: $Apache::lonxml::style_values=$Apache::lonxml::style_end_values;
457: $Apache::lonxml::style_end_values='';
458: $dontpop=1;
459: } else {
460: #clear out any tags that didn't end
461: while ($token->[1] ne $$stack['-1'] && ($#$stack > -1)) {
462: my $lasttag=$$stack[-1];
463: if ($token->[1] =~ /^\Q$lasttag\E$/i) {
464: &Apache::lonxml::warning('Using tag </'.$token->[1].'> on line '.$token->[3].' as end tag to <'.$$stack[-1].'>');
465: last;
466: } else {
467: &Apache::lonxml::warning('Found tag </'.$token->[1].'> on line '.$token->[3].' when looking for </'.$$stack[-1].'> in file');
468: &end_tag($stack,$parstack,$token);
469: }
470: }
471: $result = &callsub("end_$token->[1]", $target, $token, $stack,
472: $parstack, $pars,$safeeval, $style_for_target);
473: }
474: } else {
475: &Apache::lonxml::error("Unknown token event :$token->[0]:$token->[1]:");
476: }
477: #evaluate variable refs in result
478: if ($Apache::lonxml::post_evaluate &&$result ne "") {
479: my $extras;
480: if (!$Apache::lonxml::usestyle) {
481: $extras=$Apache::lonxml::style_values;
482: }
483: if ( $#$parstack > -1 ) {
484: $result=&Apache::run::evaluate($result,$safeeval,$extras.$$parstack[-1]);
485: } else {
486: $result= &Apache::run::evaluate($result,$safeeval,$extras);
487: }
488: }
489: $Apache::lonxml::post_evaluate=1;
490:
491: if (($token->[0] eq 'T') || ($token->[0] eq 'C') || ($token->[0] eq 'D') ) {
492: #Style file definitions should be correct
493: if ($target eq 'tex' && ($Apache::lonxml::usestyle)) {
494: $result=&latex_special_symbols($result);
495: }
496: }
497:
498: if ($Apache::lonxml::redirection) {
499: $Apache::lonxml::outputstack['-1'] .= $result;
500: } else {
501: $finaloutput.=$result;
502: }
503: $result = '';
504:
505: if ($token->[0] eq 'E' && !$dontpop) {
506: &end_tag($stack,$parstack,$token);
507: }
508: $dontpop=0;
509: }
510: if ($#$pars > -1) {
511: pop @$pars;
512: pop @Apache::lonxml::pwd;
513: }
514: }
515:
516: # if ($target eq 'meta') {
517: # $finaloutput.=&endredirection;
518: # }
519:
520:
521: if (($ENV{'QUERY_STRING'}) && ($target eq 'web')) {
522: $finaloutput=&afterburn($finaloutput);
523: }
524: return $finaloutput;
525: }
526:
527: sub callsub {
528: my ($sub,$target,$token,$tagstack,$parstack,$parser,$safeeval,$style)=@_;
529: my $currentstring='';
530: my $nodefault;
531: {
532: my $sub1;
533: no strict 'refs';
534: my $tag=$token->[1];
535: # get utterly rid of extended html tags
536: if ($tag=~/^x\-/i) { return ''; }
537: my $space=$Apache::lonxml::alltags{$tag}[-1];
538: if (!$space) {
539: $tag=~tr/A-Z/a-z/;
540: $sub=~tr/A-Z/a-z/;
541: $space=$Apache::lonxml::alltags{$tag}[-1]
542: }
543:
544: my $deleted=0;
545: $Apache::lonxml::curdepth=join('_',@Apache::lonxml::depthcounter);
546: if (($token->[0] eq 'S') && ($target eq 'modified')) {
547: $deleted=&Apache::edit::handle_delete($space,$target,$token,$tagstack,
548: $parstack,$parser,$safeeval,
549: $style);
550: }
551: if (!$deleted) {
552: if ($space) {
553: #&Apache::lonxml::debug("Calling sub $sub in $space $metamode");
554: $sub1="$space\:\:$sub";
555: ($currentstring,$nodefault) = &$sub1($target,$token,$tagstack,
556: $parstack,$parser,$safeeval,
557: $style);
558: } else {
559: #&Apache::lonxml::debug("NOT Calling sub $sub in $space $metamode");
560: if ($metamode <1) {
561: if (defined($token->[4]) && ($metamode < 1)) {
562: $currentstring = $token->[4];
563: } else {
564: $currentstring = $token->[2];
565: }
566: }
567: }
568: # &Apache::lonxml::debug("nodefalt:$nodefault:");
569: if ($currentstring eq '' && $nodefault eq '') {
570: if ($target eq 'edit') {
571: #&Apache::lonxml::debug("doing default edit for $token->[1]");
572: if ($token->[0] eq 'S') {
573: $currentstring = &Apache::edit::tag_start($target,$token);
574: } elsif ($token->[0] eq 'E') {
575: $currentstring = &Apache::edit::tag_end($target,$token);
576: }
577: } elsif ($target eq 'modified') {
578: if ($token->[0] eq 'S') {
579: $currentstring = $token->[4];
580: $currentstring.=&Apache::edit::handle_insert();
581: } elsif ($token->[0] eq 'E') {
582: $currentstring = $token->[2];
583: $currentstring.=&Apache::edit::handle_insertafter($token->[1]);
584: } else {
585: $currentstring = $token->[2];
586: }
587: }
588: }
589: }
590: use strict 'refs';
591: }
592: return $currentstring;
593: }
594:
595: sub setup_globals {
596: my ($request,$target)=@_;
597: $Apache::lonxml::request=$request;
598: $Apache::lonxml::registered = 0;
599: $errorcount=0;
600: $warningcount=0;
601: $Apache::lonxml::default_homework_loaded=0;
602: $Apache::lonxml::usestyle=1;
603: &init_counter();
604: @Apache::lonxml::pwd=();
605: @Apache::lonxml::extlinks=();
606: @Apache::lonxml::ssi_info=();
607: $Apache::lonxml::post_evaluate=1;
608: $Apache::lonxml::warnings_error_header='';
609: if ($target eq 'meta') {
610: $Apache::lonxml::redirection = 0;
611: $Apache::lonxml::metamode = 1;
612: $Apache::lonxml::evaluate = 1;
613: $Apache::lonxml::import = 0;
614: } elsif ($target eq 'answer') {
615: $Apache::lonxml::redirection = 0;
616: $Apache::lonxml::metamode = 1;
617: $Apache::lonxml::evaluate = 1;
618: $Apache::lonxml::import = 1;
619: } elsif ($target eq 'grade') {
620: &startredirection;
621: $Apache::lonxml::metamode = 0;
622: $Apache::lonxml::evaluate = 1;
623: $Apache::lonxml::import = 1;
624: } elsif ($target eq 'modified') {
625: $Apache::lonxml::redirection = 0;
626: $Apache::lonxml::metamode = 0;
627: $Apache::lonxml::evaluate = 0;
628: $Apache::lonxml::import = 0;
629: } elsif ($target eq 'edit') {
630: $Apache::lonxml::redirection = 0;
631: $Apache::lonxml::metamode = 0;
632: $Apache::lonxml::evaluate = 0;
633: $Apache::lonxml::import = 0;
634: } elsif ($target eq 'analyze') {
635: $Apache::lonxml::redirection = 0;
636: $Apache::lonxml::metamode = 0;
637: $Apache::lonxml::evaluate = 1;
638: $Apache::lonxml::import = 1;
639: } else {
640: $Apache::lonxml::redirection = 0;
641: $Apache::lonxml::metamode = 0;
642: $Apache::lonxml::evaluate = 1;
643: $Apache::lonxml::import = 1;
644: }
645: }
646:
647: sub init_safespace {
648: my ($target,$safeeval,$safehole,$safeinit) = @_;
649: $safeeval->permit("entereval");
650: $safeeval->permit(":base_math");
651: $safeeval->permit("sort");
652: $safeeval->permit("time");
653: $safeeval->deny(":base_io");
654: $safehole->wrap(\&Apache::scripttag::xmlparse,$safeeval,'&xmlparse');
655: $safehole->wrap(\&Apache::outputtags::multipart,$safeeval,'&multipart');
656: $safehole->wrap(\&Apache::lonnet::EXT,$safeeval,'&EXT');
657:
658: $safehole->wrap(\&Math::Cephes::asin,$safeeval,'&asin');
659: $safehole->wrap(\&Math::Cephes::acos,$safeeval,'&acos');
660: $safehole->wrap(\&Math::Cephes::atan,$safeeval,'&atan');
661: $safehole->wrap(\&Math::Cephes::sinh,$safeeval,'&sinh');
662: $safehole->wrap(\&Math::Cephes::cosh,$safeeval,'&cosh');
663: $safehole->wrap(\&Math::Cephes::tanh,$safeeval,'&tanh');
664: $safehole->wrap(\&Math::Cephes::asinh,$safeeval,'&asinh');
665: $safehole->wrap(\&Math::Cephes::acosh,$safeeval,'&acosh');
666: $safehole->wrap(\&Math::Cephes::atanh,$safeeval,'&atanh');
667: $safehole->wrap(\&Math::Cephes::erf,$safeeval,'&erf');
668: $safehole->wrap(\&Math::Cephes::erfc,$safeeval,'&erfc');
669: $safehole->wrap(\&Math::Cephes::j0,$safeeval,'&j0');
670: $safehole->wrap(\&Math::Cephes::j1,$safeeval,'&j1');
671: $safehole->wrap(\&Math::Cephes::jn,$safeeval,'&jn');
672: $safehole->wrap(\&Math::Cephes::jv,$safeeval,'&jv');
673: $safehole->wrap(\&Math::Cephes::y0,$safeeval,'&y0');
674: $safehole->wrap(\&Math::Cephes::y1,$safeeval,'&y1');
675: $safehole->wrap(\&Math::Cephes::yn,$safeeval,'&yn');
676: $safehole->wrap(\&Math::Cephes::yv,$safeeval,'&yv');
677:
678: $safehole->wrap(\&Math::Cephes::bdtr ,$safeeval,'&bdtr' );
679: $safehole->wrap(\&Math::Cephes::bdtrc ,$safeeval,'&bdtrc' );
680: $safehole->wrap(\&Math::Cephes::bdtri ,$safeeval,'&bdtri' );
681: $safehole->wrap(\&Math::Cephes::btdtr ,$safeeval,'&btdtr' );
682: $safehole->wrap(\&Math::Cephes::chdtr ,$safeeval,'&chdtr' );
683: $safehole->wrap(\&Math::Cephes::chdtrc,$safeeval,'&chdtrc');
684: $safehole->wrap(\&Math::Cephes::chdtri,$safeeval,'&chdtri');
685: $safehole->wrap(\&Math::Cephes::fdtr ,$safeeval,'&fdtr' );
686: $safehole->wrap(\&Math::Cephes::fdtrc ,$safeeval,'&fdtrc' );
687: $safehole->wrap(\&Math::Cephes::fdtri ,$safeeval,'&fdtri' );
688: $safehole->wrap(\&Math::Cephes::gdtr ,$safeeval,'&gdtr' );
689: $safehole->wrap(\&Math::Cephes::gdtrc ,$safeeval,'&gdtrc' );
690: $safehole->wrap(\&Math::Cephes::nbdtr ,$safeeval,'&nbdtr' );
691: $safehole->wrap(\&Math::Cephes::nbdtrc,$safeeval,'&nbdtrc');
692: $safehole->wrap(\&Math::Cephes::nbdtri,$safeeval,'&nbdtri');
693: $safehole->wrap(\&Math::Cephes::ndtr ,$safeeval,'&ndtr' );
694: $safehole->wrap(\&Math::Cephes::ndtri ,$safeeval,'&ndtri' );
695: $safehole->wrap(\&Math::Cephes::pdtr ,$safeeval,'&pdtr' );
696: $safehole->wrap(\&Math::Cephes::pdtrc ,$safeeval,'&pdtrc' );
697: $safehole->wrap(\&Math::Cephes::pdtri ,$safeeval,'&pdtri' );
698: $safehole->wrap(\&Math::Cephes::stdtr ,$safeeval,'&stdtr' );
699: $safehole->wrap(\&Math::Cephes::stdtri,$safeeval,'&stdtri');
700:
701: # $safehole->wrap(\&Math::Cephes::new_fract,$safeeval,'&new_fract');
702: # $safehole->wrap(\&Math::Cephes::radd,$safeeval,'&radd');
703: # $safehole->wrap(\&Math::Cephes::rsub,$safeeval,'&rsub');
704: # $safehole->wrap(\&Math::Cephes::rmul,$safeeval,'&rmul');
705: # $safehole->wrap(\&Math::Cephes::rdiv,$safeeval,'&rdiv');
706: # $safehole->wrap(\&Math::Cephes::euclid,$safeeval,'&euclid');
707:
708: $safehole->wrap(\&Math::Random::random_beta,$safeeval,'&math_random_beta');
709: $safehole->wrap(\&Math::Random::random_chi_square,$safeeval,'&math_random_chi_square');
710: $safehole->wrap(\&Math::Random::random_exponential,$safeeval,'&math_random_exponential');
711: $safehole->wrap(\&Math::Random::random_f,$safeeval,'&math_random_f');
712: $safehole->wrap(\&Math::Random::random_gamma,$safeeval,'&math_random_gamma');
713: $safehole->wrap(\&Math::Random::random_multivariate_normal,$safeeval,'&math_random_multivariate_normal');
714: $safehole->wrap(\&Math::Random::random_multinomial,$safeeval,'&math_random_multinomial');
715: $safehole->wrap(\&Math::Random::random_noncentral_chi_square,$safeeval,'&math_random_noncentral_chi_square');
716: $safehole->wrap(\&Math::Random::random_noncentral_f,$safeeval,'&math_random_noncentral_f');
717: $safehole->wrap(\&Math::Random::random_normal,$safeeval,'&math_random_normal');
718: $safehole->wrap(\&Math::Random::random_permutation,$safeeval,'&math_random_permutation');
719: $safehole->wrap(\&Math::Random::random_permuted_index,$safeeval,'&math_random_permuted_index');
720: $safehole->wrap(\&Math::Random::random_uniform,$safeeval,'&math_random_uniform');
721: $safehole->wrap(\&Math::Random::random_poisson,$safeeval,'&math_random_poisson');
722: $safehole->wrap(\&Math::Random::random_uniform_integer,$safeeval,'&math_random_uniform_integer');
723: $safehole->wrap(\&Math::Random::random_negative_binomial,$safeeval,'&math_random_negative_binomial');
724: $safehole->wrap(\&Math::Random::random_binomial,$safeeval,'&math_random_binomial');
725: $safehole->wrap(\&Math::Random::random_seed_from_phrase,$safeeval,'&random_seed_from_phrase');
726: $safehole->wrap(\&Math::Random::random_set_seed_from_phrase,$safeeval,'&random_set_seed_from_phrase');
727: $safehole->wrap(\&Math::Random::random_get_seed,$safeeval,'&random_get_seed');
728: $safehole->wrap(\&Math::Random::random_set_seed,$safeeval,'&random_set_seed');
729: $safehole->wrap(\&Apache::lonxml::error,$safeeval,'&LONCAPA_INTERNAL_ERROR');
730: $safehole->wrap(\&Apache::lonxml::debug,$safeeval,'&LONCAPA_INTERNAL_DEBUG');
731:
732: #need to inspect this class of ops
733: # $safeeval->deny(":base_orig");
734: $safeinit .= ';$external::target="'.$target.'";';
735: my $rndseed;
736: my ($symb,$courseid,$domain,$name) = &Apache::lonxml::whichuser();
737: $rndseed=&Apache::lonnet::rndseed($symb,$courseid,$domain,$name);
738: $safeinit .= ';$external::randomseed='.$rndseed.';';
739: &Apache::lonxml::debug("Setting rndseed to $rndseed");
740: &Apache::run::run($safeinit,$safeeval);
741:
742: my $subroutine=<<'EVALUATESUB';
743: sub __LC_INTERNAL_EVALUATE__ {
744: my ($__LC__a,$__LC__b,$__LC__c)=@_;
745: my $__LC__prefix;
746: while(1){
747: {
748: use strict;
749: no strict "vars";
750: if (eval(defined(eval($__LC__a.$__LC__b)))) {
751: return $__LC__prefix.eval($__LC__a.$__LC__b.$__LC__c);
752: }
753: }
754: $__LC__prefix.=substr($__LC__a,0,1,"");
755: if ($__LC__a!~/^(\$|&|\#)/) { last; }
756: }
757: return $__LC__prefix.$__LC__a.$__LC__b.$__LC__c;
758: }
759: EVALUATESUB
760: $safeeval->permit("require");
761: $safeeval->reval($subroutine);
762: $safeeval->deny("require");
763: }
764:
765: sub default_homework_load {
766: my ($safeeval)=@_;
767: &Apache::lonxml::debug('Loading default_homework');
768: my $default=&Apache::lonnet::getfile('/home/httpd/html/res/adm/includes/default_homework.lcpm');
769: if ($default eq -1) {
770: &Apache::lonxml::error("<b>Unable to find <i>default_homework.lcpm</i></b>");
771: } else {
772: &Apache::run::run($default,$safeeval);
773: $Apache::lonxml::default_homework_loaded=1;
774: }
775: }
776:
777: sub startredirection {
778: $Apache::lonxml::redirection++;
779: push (@Apache::lonxml::outputstack, '');
780: }
781:
782: sub endredirection {
783: if (!$Apache::lonxml::redirection) {
784: &Apache::lonxml::error("Endredirection was called, before a startredirection, perhaps you have unbalanced tags. Some debuging information:".join ":",caller);
785: return '';
786: }
787: $Apache::lonxml::redirection--;
788: pop @Apache::lonxml::outputstack;
789: }
790:
791: sub end_tag {
792: my ($tagstack,$parstack,$token)=@_;
793: pop(@$tagstack);
794: pop(@$parstack);
795: &decreasedepth($token);
796: }
797:
798: sub initdepth {
799: @Apache::lonxml::depthcounter=();
800: $Apache::lonxml::depth=-1;
801: $Apache::lonxml::olddepth=-1;
802: }
803:
804: sub increasedepth {
805: my ($token) = @_;
806: $Apache::lonxml::depth++;
807: $Apache::lonxml::depthcounter[$Apache::lonxml::depth]++;
808: if ($Apache::lonxml::depthcounter[$Apache::lonxml::depth]==1) {
809: $Apache::lonxml::olddepth=$Apache::lonxml::depth;
810: }
811: my $curdepth=join('_',@Apache::lonxml::depthcounter);
812: &Apache::lonxml::debug("s $Apache::lonxml::depth : $Apache::lonxml::olddepth : $curdepth : $token->[1]\n");
813: #print "<br />s $Apache::lonxml::depth : $Apache::lonxml::olddepth : $curdepth : $token->[1]\n";
814: }
815:
816: sub decreasedepth {
817: my ($token) = @_;
818: $Apache::lonxml::depth--;
819: if ($Apache::lonxml::depth<$Apache::lonxml::olddepth-1) {
820: $#Apache::lonxml::depthcounter--;
821: $Apache::lonxml::olddepth=$Apache::lonxml::depth+1;
822: }
823: if ( $Apache::lonxml::depth < -1) {
824: &Apache::lonxml::warning(&mt("Missing tags, unable to properly run file."));
825: $Apache::lonxml::depth='-1';
826: }
827: my $curdepth=join('_',@Apache::lonxml::depthcounter);
828: &Apache::lonxml::debug("e $Apache::lonxml::depth : $Apache::lonxml::olddepth : $token->[1] : $curdepth\n");
829: #print "<br />e $Apache::lonxml::depth : $Apache::lonxml::olddepth : $token->[1] : $curdepth\n";
830: }
831:
832: sub get_all_text_unbalanced {
833: #there is a copy of this in lonpublisher.pm
834: my($tag,$pars)= @_;
835: my $token;
836: my $result='';
837: $tag='<'.$tag.'>';
838: while ($token = $$pars[-1]->get_token) {
839: if (($token->[0] eq 'T')||($token->[0] eq 'C')||($token->[0] eq 'D')) {
840: $result.=$token->[1];
841: } elsif ($token->[0] eq 'PI') {
842: $result.=$token->[2];
843: } elsif ($token->[0] eq 'S') {
844: $result.=$token->[4];
845: } elsif ($token->[0] eq 'E') {
846: $result.=$token->[2];
847: }
848: if ($result =~ /(.*)\Q$tag\E(.*)/is) {
849: &Apache::lonxml::debug('Got a winner with leftovers ::'.$2);
850: &Apache::lonxml::debug('Result is :'.$1);
851: $result=$1;
852: my $redo=$tag.$2;
853: &Apache::lonxml::newparser($pars,\$redo);
854: last;
855: }
856: }
857: return $result
858: }
859:
860: sub increment_counter {
861: my ($increment) = @_;
862: if (defined($increment) && $increment gt 0) {
863: $Apache::lonxml::counter+=$increment;
864: } else {
865: $Apache::lonxml::counter++;
866: }
867: $Apache::lonxml::counter_changed=1;
868: }
869:
870: sub init_counter {
871: if (defined($ENV{'form.counter'})) {
872: $Apache::lonxml::counter=$ENV{'form.counter'};
873: $Apache::lonxml::counter_changed=0;
874: } else {
875: $Apache::lonxml::counter=1;
876: $Apache::lonxml::counter_changed=1;
877: }
878: }
879:
880: sub store_counter {
881: &Apache::lonnet::appenv(('form.counter' => $Apache::lonxml::counter));
882: return '';
883: }
884:
885: sub get_all_text {
886: my($tag,$pars,$style)= @_;
887: my $gotfullstack=1;
888: if (ref($pars) ne 'ARRAY') {
889: $gotfullstack=0;
890: $pars=[$pars];
891: }
892: if (ref($style) ne 'HASH') {
893: $style={};
894: }
895: my $depth=0;
896: my $token;
897: my $result='';
898: if ( $tag =~ m:^/: ) {
899: my $tag=substr($tag,1);
900: #&Apache::lonxml::debug("have:$tag:");
901: my $top_empty=0;
902: while (($depth >=0) && ($#$pars > -1) && (!$top_empty)) {
903: while (($depth >=0) && ($token = $$pars[-1]->get_token)) {
904: #&Apache::lonxml::debug("e token:$token->[0]:$depth:$token->[1]:".$#$pars.":".$#Apache::lonxml::pwd);
905: if (($token->[0] eq 'T')||($token->[0] eq 'C')||($token->[0] eq 'D')) {
906: $result.=$token->[1];
907: } elsif ($token->[0] eq 'PI') {
908: $result.=$token->[2];
909: } elsif ($token->[0] eq 'S') {
910: if ($token->[1] =~ /^\Q$tag\E$/i) { $depth++; }
911: if ($token->[1] =~ /^LONCAPA_INTERNAL_TURN_STYLE_ON$/) { $Apache::lonxml::usestyle=1; }
912: if ($token->[1] =~ /^LONCAPA_INTERNAL_TURN_STYLE_OFF$/) { $Apache::lonxml::usestyle=0; }
913: $result.=$token->[4];
914: } elsif ($token->[0] eq 'E') {
915: if ( $token->[1] =~ /^\Q$tag\E$/i) { $depth--; }
916: #skip sending back the last end tag
917: if ($depth == 0 && exists($$style{'/'.$token->[1]}) && $Apache::lonxml::usestyle) {
918: my $string=
919: '<LONCAPA_INTERNAL_TURN_STYLE_OFF end="yes" />'.
920: $$style{'/'.$token->[1]}.
921: $token->[2].
922: '<LONCAPA_INTERNAL_TURN_STYLE_ON />';
923: &Apache::lonxml::newparser($pars,\$string);
924: #&Apache::lonxml::debug("reParsing $string");
925: next;
926: }
927: if ($depth > -1) {
928: $result.=$token->[2];
929: } else {
930: $$pars[-1]->unget_token($token);
931: }
932: }
933: }
934: if (($depth >=0) && ($#$pars == 0) ) { $top_empty=1; }
935: if (($depth >=0) && ($#$pars > 0) ) {
936: pop(@$pars);
937: pop(@Apache::lonxml::pwd);
938: }
939: }
940: if ($top_empty && $depth >= 0) {
941: #never found the end tag ran out of text, throw error send back blank
942: &error('Never found end tag for <'.$tag.
943: '> current string <pre>'.
944: &HTML::Entities::encode($result,'<>&"').
945: '</pre>');
946: if ($gotfullstack) {
947: my $newstring='</'.$tag.'>'.$result;
948: &Apache::lonxml::newparser($pars,\$newstring);
949: }
950: $result='';
951: }
952: } else {
953: while ($#$pars > -1) {
954: while ($token = $$pars[-1]->get_token) {
955: #&Apache::lonxml::debug("s token:$token->[0]:$depth:$token->[1]");
956: if (($token->[0] eq 'T')||($token->[0] eq 'C')||
957: ($token->[0] eq 'D')) {
958: $result.=$token->[1];
959: } elsif ($token->[0] eq 'PI') {
960: $result.=$token->[2];
961: } elsif ($token->[0] eq 'S') {
962: if ( $token->[1] =~ /^\Q$tag\E$/i) {
963: $$pars[-1]->unget_token($token); last;
964: } else {
965: $result.=$token->[4];
966: }
967: if ($token->[1] =~ /^LONCAPA_INTERNAL_TURN_STYLE_ON$/) { $Apache::lonxml::usestyle=1; }
968: if ($token->[1] =~ /^LONCAPA_INTERNAL_TURN_STYLE_OFF$/) { $Apache::lonxml::usestyle=0; }
969: } elsif ($token->[0] eq 'E') {
970: $result.=$token->[2];
971: }
972: }
973: if (($#$pars > 0) ) {
974: pop(@$pars);
975: pop(@Apache::lonxml::pwd);
976: } else { last; }
977: }
978: }
979: #&Apache::lonxml::debug("Exit:$result:");
980: return $result
981: }
982:
983: sub newparser {
984: my ($parser,$contentref,$dir) = @_;
985: push (@$parser,HTML::LCParser->new($contentref));
986: $$parser['-1']->xml_mode('1');
987: if ( $dir eq '' ) {
988: push (@Apache::lonxml::pwd, $Apache::lonxml::pwd[$#Apache::lonxml::pwd]);
989: } else {
990: push (@Apache::lonxml::pwd, $dir);
991: }
992: }
993:
994: sub parstring {
995: my ($token) = @_;
996: my $temp='';
997: foreach (@{$token->[3]}) {
998: unless ($_=~/\W/) {
999: my $val=$token->[2]->{$_};
1000: $val =~ s/([\%\@\\\"\'])/\\$1/g;
1001: #if ($val =~ m/^[\%\@]/) { $val="\\".$val; }
1002: $temp .= "my \$$_=\"$val\";";
1003: }
1004: }
1005: return $temp;
1006: }
1007:
1008: sub writeallows {
1009: unless ($#extlinks>=0) { return; }
1010: my $thisurl='/res/'.&Apache::lonnet::declutter(shift);
1011: if ($ENV{'httpref.'.$thisurl}) {
1012: $thisurl=$ENV{'httpref.'.$thisurl};
1013: }
1014: my $thisdir=$thisurl;
1015: $thisdir=~s/\/[^\/]+$//;
1016: my %httpref=();
1017: foreach (@extlinks) {
1018: $httpref{'httpref.'.
1019: &Apache::lonnet::hreflocation($thisdir,$_)}=$thisurl;
1020: }
1021: @extlinks=();
1022: &Apache::lonnet::appenv(%httpref);
1023: }
1024:
1025: sub register_ssi {
1026: my ($url,%form)=@_;
1027: push (@Apache::lonxml::ssi_info,{'url'=>$url,'form'=>\%form});
1028: return '';
1029: }
1030:
1031: sub do_registered_ssi {
1032: foreach my $info (@Apache::lonxml::ssi_info) {
1033: my %form=%{ $info->{'form'}};
1034: my $url=$info->{'url'};
1035: &Apache::lonnet::ssi($url,%form);
1036: }
1037: }
1038: #
1039: # Afterburner handles anchors, highlights and links
1040: #
1041: sub afterburn {
1042: my $result=shift;
1043: &Apache::loncommon::get_unprocessed_cgi($ENV{'QUERY_STRING'},
1044: ['highlight','anchor','link']);
1045: if ($ENV{'form.highlight'}) {
1046: foreach (split(/\,/,$ENV{'form.highlight'})) {
1047: my $anchorname=$_;
1048: my $matchthis=$anchorname;
1049: $matchthis=~s/\_+/\\s\+/g;
1050: $result=~s/(\Q$matchthis\E)/\<font color=\"red\"\>$1\<\/font\>/gs;
1051: }
1052: }
1053: if ($ENV{'form.link'}) {
1054: foreach (split(/\,/,$ENV{'form.link'})) {
1055: my ($anchorname,$linkurl)=split(/\>/,$_);
1056: my $matchthis=$anchorname;
1057: $matchthis=~s/\_+/\\s\+/g;
1058: $result=~s/(\Q$matchthis\E)/\<a href=\"$linkurl\"\>$1\<\/a\>/gs;
1059: }
1060: }
1061: if ($ENV{'form.anchor'}) {
1062: my $anchorname=$ENV{'form.anchor'};
1063: my $matchthis=$anchorname;
1064: $matchthis=~s/\_+/\\s\+/g;
1065: $result=~s/(\Q$matchthis\E)/\<a name=\"$anchorname\"\>$1\<\/a\>/s;
1066: $result.=(<<"ENDSCRIPT");
1067: <script type="text/javascript">
1068: document.location.hash='$anchorname';
1069: </script>
1070: ENDSCRIPT
1071: }
1072: return $result;
1073: }
1074:
1075: sub storefile {
1076: my ($file,$contents)=@_;
1077: &Apache::lonnet::correct_line_ends(\$contents);
1078: if (my $fh=Apache::File->new('>'.$file)) {
1079: print $fh $contents;
1080: $fh->close();
1081: return 1;
1082: } else {
1083: &warning("Unable to save file $file");
1084: return 0;
1085: }
1086: }
1087:
1088: sub createnewhtml {
1089: my $filecontents=(<<SIMPLECONTENT);
1090: <html>
1091: <head>
1092: <title>
1093: Title of Document Goes Here
1094: </title>
1095: </head>
1096: <body bgcolor="#FFFFFF">
1097:
1098: Body of Document Goes Here
1099:
1100: </body>
1101: </html>
1102: SIMPLECONTENT
1103: return $filecontents;
1104: }
1105:
1106: sub createnewsty {
1107: my $filecontents=(<<SIMPLECONTENT);
1108: <definetag name="">
1109: <render>
1110: <web></web>
1111: <tex></tex>
1112: </render>
1113: </definetag>
1114: SIMPLECONTENT
1115: return $filecontents;
1116: }
1117:
1118:
1119: sub inserteditinfo {
1120: my ($result,$filecontents,$filetype)=@_;
1121: $filecontents = &HTML::Entities::encode($filecontents,'<>&"');
1122: # my $editheader='<a href="#editsection">Edit below</a><hr />';
1123: my $xml_help = '';
1124: if ($filetype eq 'html') {
1125: $xml_help=Apache::loncommon::helpLatexCheatsheet();
1126: }
1127: my $cleanbut = '';
1128: if ($filetype eq 'html') {
1129: $cleanbut='<input type="submit" name="attemptclean" value="'.
1130: &mt('Save and then attempt to clean HTML').'" />';
1131: }
1132: my $titledisplay=&display_title();
1133: my %lt=&Apache::lonlocal::texthash('st' => 'Save this',
1134: 'vi' => 'View',
1135: 'ed' => 'Edit');
1136: my $buttons=(<<BUTTONS);
1137: $cleanbut
1138: <input type="submit" name="savethisfile" accesskey="s" value="$lt{'st'}" />
1139: <input type="submit" name="viewmode" accesskey="v" value="$lt{'vi'}" />
1140: BUTTONS
1141: my $editfooter=(<<ENDFOOTER);
1142: <hr />
1143: <a name="editsection" />
1144: <form method="post">
1145: $xml_help
1146: <input type="hidden" name="editmode" value="$lt{'ed'}" />
1147: $buttons<br />
1148: <textarea cols="80" rows="40" name="filecont">$filecontents</textarea>
1149: <br />$buttons
1150: <br />
1151: </form>
1152: $titledisplay
1153: ENDFOOTER
1154: # $result=~s/(\<body[^\>]*\>)/$1$editheader/is;
1155: $result=~s/(\<\/body\>)/$editfooter/is;
1156: return $result;
1157: }
1158:
1159: sub get_target {
1160: my $viewgrades=&Apache::lonnet::allowed('vgr',$ENV{'request.course.id'});
1161: if ( $ENV{'request.state'} eq 'published') {
1162: if ( defined($ENV{'form.grade_target'})
1163: && ($viewgrades == 'F' )) {
1164: return ($ENV{'form.grade_target'});
1165: } elsif (defined($ENV{'form.grade_target'})) {
1166: if (($ENV{'form.grade_target'} eq 'web') ||
1167: ($ENV{'form.grade_target'} eq 'tex') ) {
1168: return $ENV{'form.grade_target'}
1169: } else {
1170: return 'web';
1171: }
1172: } else {
1173: return 'web';
1174: }
1175: } elsif ($ENV{'request.state'} eq 'construct') {
1176: if ( defined($ENV{'form.grade_target'})) {
1177: return ($ENV{'form.grade_target'});
1178: } else {
1179: return 'web';
1180: }
1181: } else {
1182: return 'web';
1183: }
1184: }
1185:
1186: sub handler {
1187: my $request=shift;
1188:
1189: my $target=&get_target();
1190:
1191: $Apache::lonxml::debug=$ENV{'user.debug'};
1192:
1193: if ($ENV{'browser.mathml'}) {
1194: &Apache::loncommon::content_type($request,'text/xml');
1195: } else {
1196: &Apache::loncommon::content_type($request,'text/html');
1197: }
1198: &Apache::loncommon::no_cache($request);
1199: $request->send_http_header;
1200:
1201: return OK if $request->header_only;
1202:
1203:
1204: my $file=&Apache::lonnet::filelocation("",$request->uri);
1205: my $filetype;
1206: if ($file =~ /\.sty$/) {
1207: $filetype='sty';
1208: } else {
1209: $filetype='html';
1210: }
1211: #
1212: # Edit action? Save file.
1213: #
1214: unless ($ENV{'request.state'} eq 'published') {
1215: if (($ENV{'form.savethisfile'}) || ($ENV{'form.attemptclean'})) {
1216: if (&storefile($file,$ENV{'form.filecont'})) {
1217: &Apache::lonxml::info("<font COLOR=\"#0000FF\">".
1218: &mt('Updated').": ".
1219: &Apache::lonlocal::locallocaltime(time).
1220: " </font>");
1221: }
1222: }
1223: }
1224: my %mystyle;
1225: my $result = '';
1226: my $filecontents=&Apache::lonnet::getfile($file);
1227: if ($filecontents eq -1) {
1228: my $bodytag=&Apache::loncommon::bodytag('File Error');
1229: my $fnf=&mt('File not found');
1230: $result=(<<ENDNOTFOUND);
1231: <html>
1232: <head>
1233: <title>$fnf</title>
1234: </head>
1235: $bodytag
1236: <b>$fnf: $file</b>
1237: </body>
1238: </html>
1239: ENDNOTFOUND
1240: $filecontents='';
1241: if ($ENV{'request.state'} ne 'published') {
1242: if ($filetype eq 'sty') {
1243: $filecontents=&createnewsty();
1244: } else {
1245: $filecontents=&createnewhtml();
1246: }
1247: $ENV{'form.editmode'}='Edit'; #force edit mode
1248: }
1249: } else {
1250: unless ($ENV{'request.state'} eq 'published') {
1251: if ($ENV{'form.attemptclean'}) {
1252: $filecontents=&htmlclean($filecontents,1);
1253: }
1254: #
1255: # we are in construction space, see if edit mode forced
1256: &Apache::loncommon::get_unprocessed_cgi
1257: ($ENV{'QUERY_STRING'},['editmode']);
1258: }
1259: if (!$ENV{'form.editmode'} || $ENV{'form.viewmode'}) {
1260: $result = &Apache::lonxml::xmlparse($request,$target,$filecontents,
1261: '',%mystyle);
1262: }
1263: }
1264:
1265: #
1266: # Edit action? Insert editing commands
1267: #
1268: unless ($ENV{'request.state'} eq 'published') {
1269: if ($ENV{'form.editmode'} && (!($ENV{'form.viewmode'}))) {
1270: my $displayfile=$request->uri;
1271: $displayfile=~s/^\/[^\/]*//;
1272: $result='<html><body bgcolor="#FFFFFF">'.
1273: &Apache::lonxml::message_location().'<h3>'.
1274: $displayfile.
1275: '</h3></body></html>';
1276: $result=&inserteditinfo($result,$filecontents,$filetype);
1277: }
1278: }
1279: if ($filetype eq 'html') { writeallows($request->uri); }
1280:
1281:
1282: &Apache::lonxml::add_messages(\$result);
1283: $request->print($result);
1284:
1285: return OK;
1286: }
1287:
1288: sub display_title {
1289: my $result;
1290: if ($ENV{'request.state'} eq 'construct') {
1291: my $title=&Apache::lonnet::gettitle();
1292: if (!defined($title) || $title eq '') {
1293: $title = $ENV{'request.filename'};
1294: $title = substr($title, rindex($title, '/') + 1);
1295: }
1296: $result = "<script type='text/javascript'>top.document.title = '$title - LON-CAPA Construction Space';</script>";
1297: }
1298: return $result;
1299: }
1300:
1301: sub debug {
1302: if ($Apache::lonxml::debug eq "1") {
1303: $|=1;
1304: my $request=$Apache::lonxml::request;
1305: if (!$request) { $request=Apache->request; }
1306: $request->print('<font size="-2"><pre>DEBUG:'.&HTML::Entities::encode($_[0],'<>&"')."</pre></font>\n");
1307: }
1308: }
1309:
1310: sub error {
1311: $errorcount++;
1312: my $request=$Apache::lonxml::request;
1313: if (!$request) { $request=Apache->request; }
1314: if (($Apache::lonxml::debug eq 1) || ($ENV{'request.state'} eq 'construct') ) {
1315: # If printing in construction space, put the error inside <pre></pre>
1316: push(@Apache::lonxml::error_messages,
1317: $Apache::lonxml::warnings_error_header.
1318: "<b>ERROR:</b>".join("<br />\n",@_)."<br />\n");
1319: $Apache::lonxml::warnings_error_header='';
1320: } else {
1321: push(@Apache::lonxml::error_messages,
1322: "<b>An Error occured while processing this resource. The instructor has been notified.</b> <br />");
1323: #notify author
1324: &Apache::lonmsg::author_res_msg($ENV{'request.filename'},join('<br />',@_));
1325: #notify course
1326: if ( $ENV{'request.course.id'} ) {
1327: my (undef,%users)=&Apache::lonfeedback::decide_receiver(undef,0,1,1,1);
1328: my $declutter=&Apache::lonnet::declutter($ENV{'request.filename'});
1329: foreach (keys %users) {
1330: my ($user,$domain) = split(/:/, $_);
1331: &Apache::lonmsg::user_normal_msg($user,$domain,
1332: "Error [$declutter]",join('<br />',@_));
1333: }
1334: }
1335: }
1336: }
1337:
1338: sub warning {
1339: $warningcount++;
1340:
1341: if ($ENV{'form.grade_target'} ne 'tex') {
1342: if ($ENV{'request.state'} eq 'construct' || $Apache::lonxml::debug) {
1343: my $request=$Apache::lonxml::request;
1344: if (!$request) { $request=Apache->request; }
1345: push(@Apache::lonxml::warning_messages,
1346: $Apache::lonxml::warnings_error_header.
1347: "<b>W</b>ARNING<b>:</b>".join('<br />',@_)."<br />\n");
1348: $Apache::lonxml::warnings_error_header='';
1349: }
1350: }
1351: }
1352:
1353: sub info {
1354: if ($ENV{'form.grade_target'} ne 'tex'
1355: && $ENV{'request.state'} eq 'construct') {
1356: push(@Apache::lonxml::info_messages,join('<br />',@_)."<br />\n");
1357: }
1358: }
1359:
1360: sub message_location {
1361: return '__LONCAPA_INTERNAL_MESSAGE_LOCATION__';
1362: }
1363:
1364: sub add_messages {
1365: my ($msg)=@_;
1366: my $result=join(' ',
1367: @Apache::lonxml::info_messages,
1368: @Apache::lonxml::error_messages,
1369: @Apache::lonxml::warning_messages);
1370: undef(@Apache::lonxml::info_messages);
1371: undef(@Apache::lonxml::error_messages);
1372: undef(@Apache::lonxml::warning_messages);
1373: $$msg=~s/__LONCAPA_INTERNAL_MESSAGE_LOCATION__/$result/;
1374: $$msg=~s/__LONCAPA_INTERNAL_MESSAGE_LOCATION__//g;
1375: }
1376:
1377: sub get_param {
1378: my ($param,$parstack,$safeeval,$context,$case_insensitive) = @_;
1379: if ( ! $context ) { $context = -1; }
1380: my $args ='';
1381: if ( $#$parstack > (-2-$context) ) { $args=$$parstack[$context]; }
1382: if ( ! $Apache::lonxml::usestyle ) {
1383: $args=$Apache::lonxml::style_values.$args;
1384: }
1385: if ( ! $args ) { return undef; }
1386: if ( $case_insensitive ) {
1387: if ($args =~ s/(my \$)(\Q$param\E)(=\")/$1.lc($2).$3/ei) {
1388: return &Apache::run::run("{$args;".'return $'.$param.'}',
1389: $safeeval); #'
1390: } else {
1391: return undef;
1392: }
1393: } else {
1394: if ( $args =~ /my \$\Q$param\E=\"/ ) {
1395: return &Apache::run::run("{$args;".'return $'.$param.'}',
1396: $safeeval); #'
1397: } else {
1398: return undef;
1399: }
1400: }
1401: }
1402:
1403: sub get_param_var {
1404: my ($param,$parstack,$safeeval,$context,$case_insensitive) = @_;
1405: if ( ! $context ) { $context = -1; }
1406: my $args ='';
1407: if ( $#$parstack > (-2-$context) ) { $args=$$parstack[$context]; }
1408: if ( ! $Apache::lonxml::usestyle ) {
1409: $args=$Apache::lonxml::style_values.$args;
1410: }
1411: &Apache::lonxml::debug("Args are $args param is $param");
1412: if ($case_insensitive) {
1413: if (! ($args=~s/(my \$)(\Q$param\E)(=\")/$1.lc($2).$3/ei)) {
1414: return undef;
1415: }
1416: } elsif ( $args !~ /my \$\Q$param\E=\"/ ) { return undef; }
1417: my $value=&Apache::run::run("{$args;".'return $'.$param.'}',$safeeval); #'
1418: &Apache::lonxml::debug("first run is $value");
1419: if ($value =~ /^[\$\@\%]\w+$/) {
1420: &Apache::lonxml::debug("doing second");
1421: my @result=&Apache::run::run("return $value",$safeeval,1);
1422: if (!defined($result[0])) {
1423: return $value
1424: } else {
1425: if (wantarray) { return @result; } else { return $result[0]; }
1426: }
1427: } else {
1428: return $value;
1429: }
1430: }
1431:
1432: sub register_insert {
1433: my @data = split /\n/, &Apache::lonnet::getfile('/home/httpd/lonTabs/insertlist.tab');
1434: my $i;
1435: my $tagnum=0;
1436: my @order;
1437: for ($i=0;$i < $#data; $i++) {
1438: my $line = $data[$i];
1439: if ( $line =~ /^\#/ || $line =~ /^\s*\n/) { next; }
1440: if ( $line =~ /TABLE/ ) { last; }
1441: my ($tag,$descrip,$color,$function,$show,$helpfile,$helpdesc) = split(/,/, $line);
1442: if ($tag) {
1443: $insertlist{"$tagnum.tag"} = $tag;
1444: $insertlist{"$tagnum.description"} = $descrip;
1445: $insertlist{"$tagnum.color"} = $color;
1446: $insertlist{"$tagnum.function"} = $function;
1447: if (!defined($show)) { $show='yes'; }
1448: $insertlist{"$tagnum.show"}= $show;
1449: $insertlist{"$tagnum.helpfile"} = $helpfile;
1450: $insertlist{"$tagnum.helpdesc"} = $helpdesc;
1451: $insertlist{"$tag.num"}=$tagnum;
1452: $tagnum++;
1453: }
1454: }
1455: $i++; #skipping TABLE line
1456: $tagnum = 0;
1457: for (;$i < $#data;$i++) {
1458: my $line = $data[$i];
1459: my ($mnemonic,@which) = split(/ +/,$line);
1460: my $tag = $insertlist{"$tagnum.tag"};
1461: for (my $j=0;$j <=$#which;$j++) {
1462: if ( $which[$j] eq 'Y' ) {
1463: if ($insertlist{"$j.show"} ne 'no') {
1464: push(@{ $insertlist{"$tag.which"} },$j);
1465: }
1466: }
1467: }
1468: $tagnum++;
1469: }
1470: }
1471:
1472: sub description {
1473: my ($token)=@_;
1474: my $tagnum;
1475: my $tag=$token->[1];
1476: foreach my $namespace (reverse @Apache::lonxml::namespace) {
1477: my $testtag=$namespace.'::'.$tag;
1478: $tagnum=$insertlist{"$testtag.num"};
1479: if (defined($tagnum)) { last; }
1480: }
1481: if (!defined ($tagnum)) { $tagnum=$Apache::lonxml::insertlist{"$tag.num"}; }
1482: return $insertlist{$tagnum.'.description'};
1483: }
1484:
1485: # Returns a list containing the help file, and the description
1486: sub helpinfo {
1487: my ($token)=@_;
1488: my $tagnum;
1489: my $tag=$token->[1];
1490: foreach my $namespace (reverse @Apache::lonxml::namespace) {
1491: my $testtag=$namespace.'::'.$tag;
1492: $tagnum=$insertlist{"$testtag.num"};
1493: if (defined($tagnum)) { last; }
1494: }
1495: if (!defined ($tagnum)) { $tagnum=$Apache::lonxml::insertlist{"$tag.num"}; }
1496: return ($insertlist{$tagnum.'.helpfile'}, $insertlist{$tagnum.'.helpdesc'});
1497: }
1498:
1499: # ----------------------------------------------------------------- whichuser
1500: # returns a list of $symb, $courseid, $domain, $name that is correct for
1501: # calls to lonnet functions for this setup.
1502: # - looks for form.grade_ parameters
1503: sub whichuser {
1504: my ($passedsymb)=@_;
1505: my ($symb,$courseid,$domain,$name,$publicuser);
1506: if (defined($ENV{'form.grade_symb'})) {
1507: my $tmp_courseid=$ENV{'form.grade_courseid'};
1508: my $allowed=&Apache::lonnet::allowed('vgr',$tmp_courseid);
1509: if ($allowed) {
1510: $symb=$ENV{'form.grade_symb'};
1511: $courseid=$ENV{'form.grade_courseid'};
1512: $domain=$ENV{'form.grade_domain'};
1513: $name=$ENV{'form.grade_username'};
1514: }
1515: } else {
1516: if (!$passedsymb) {
1517: $symb=&Apache::lonnet::symbread();
1518: } else {
1519: $symb=$passedsymb;
1520: }
1521: $courseid=$ENV{'request.course.id'};
1522: $domain=$ENV{'user.domain'};
1523: $name=$ENV{'user.name'};
1524: if ($name eq 'public' && $domain eq 'public') {
1525: if (!defined($ENV{'form.username'})) {
1526: $ENV{'form.username'}.=time.rand(10000000);
1527: }
1528: $name.=$ENV{'form.username'};
1529: }
1530: }
1531: return ($symb,$courseid,$domain,$name,$publicuser);
1532: }
1533:
1534: 1;
1535: __END__
1536:
1537:
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