1: # The LearningOnline Network with CAPA
2: # XML Parser Module
3: #
4: # $Id: lonxml.pm,v 1.339 2004/10/05 18:51:50 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 $warningcount @htmlareafields);
44: use strict;
45: use HTML::LCParser();
46: use HTML::TreeBuilder();
47: use HTML::Entities();
48: use Safe();
49: use Safe::Hole();
50: use Math::Cephes();
51: use Math::Random();
52: use Opcode();
53: use POSIX qw(strftime);
54: use Time::HiRes qw( gettimeofday tv_interval );
55:
56: sub register {
57: my ($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 $output='';
153: @htmlareafields=();
154: if ($ENV{'browser.mathml'}) {
155: $output='<?xml version="1.0"?>'
156: .'<?xml-stylesheet type="text/css" href="/adm/MathML/mathml.css"?>'
157: .'<!DOCTYPE html SYSTEM "/adm/MathML/mathml.dtd" '
158: .'[<!ENTITY mathns "http://www.w3.org/1998/Math/MathML">]>'
159: .'<html xmlns:math="http://www.w3.org/1998/Math/MathML" '
160: .'xmlns="http://www.w3.org/TR/REC-html40">';
161: } else {
162: $output='<html>';
163: }
164: return $output;
165: }
166:
167: sub xmlend {
168: my ($target,$parser)=@_;
169: my $mode='xml';
170: my $status='OPEN';
171: if ($Apache::lonhomework::parsing_a_problem) {
172: $mode='problem';
173: $status=$Apache::inputtags::status[-1];
174: }
175: my $discussion=&Apache::lonfeedback::list_discussion($mode,$status);
176: if ($target eq 'tex') {
177: $discussion.='<tex>\keephidden{ENDOFPROBLEM}\vskip 0.5mm\noindent\makebox[\textwidth/$number_of_columns][b]{\hrulefill}\end{document}</tex>';
178: &Apache::lonxml::newparser($parser,\$discussion,'');
179: return '';
180: } else {
181: return $discussion.'</html>';
182: }
183: }
184:
185: sub tokeninputfield {
186: my $defhost=$Apache::lonnet::perlvar{'lonHostID'};
187: $defhost=~tr/a-z/A-Z/;
188: return (<<ENDINPUTFIELD)
189: <script type="text/javascript">
190: function updatetoken() {
191: var comp=new Array;
192: var barcode=unescape(document.tokeninput.barcode.value);
193: comp=barcode.split('*');
194: if (typeof(comp[0])!="undefined") {
195: document.tokeninput.codeone.value=comp[0];
196: }
197: if (typeof(comp[1])!="undefined") {
198: document.tokeninput.codetwo.value=comp[1];
199: }
200: if (typeof(comp[2])!="undefined") {
201: comp[2]=comp[2].toUpperCase();
202: document.tokeninput.codethree.value=comp[2];
203: }
204: document.tokeninput.barcode.value='';
205: }
206: </script>
207: <form method="post" name="tokeninput">
208: <table border="2" bgcolor="#FFFFBB">
209: <tr><th>DocID Checkin</th></tr>
210: <tr><td>
211: <table>
212: <tr>
213: <td>Scan in Barcode</td>
214: <td><input type="text" size="22" name="barcode"
215: onChange="updatetoken()"/></td>
216: </tr>
217: <tr><td><i>or</i> Type in DocID</td>
218: <td>
219: <input type="text" size="5" name="codeone" />
220: <b><font size="+2">*</font></b>
221: <input type="text" size="5" name="codetwo" />
222: <b><font size="+2">*</font></b>
223: <input type="text" size="10" name="codethree" value="$defhost"
224: onChange="this.value=this.value.toUpperCase()" />
225: </td></tr>
226: </table>
227: </td></tr>
228: <tr><td><input type="submit" value="Check in DocID" /></td></tr>
229: </table>
230: </form>
231: ENDINPUTFIELD
232: }
233:
234: sub maketoken {
235: my ($symb,$tuname,$tudom,$tcrsid)=@_;
236: unless ($symb) {
237: $symb=&Apache::lonnet::symbread();
238: }
239: unless ($tuname) {
240: $tuname=$ENV{'user.name'};
241: $tudom=$ENV{'user.domain'};
242: $tcrsid=$ENV{'request.course.id'};
243: }
244:
245: return &Apache::lonnet::checkout($symb,$tuname,$tudom,$tcrsid);
246: }
247:
248: sub printtokenheader {
249: my ($target,$token,$tsymb,$tcrsid,$tudom,$tuname)=@_;
250: unless ($token) { return ''; }
251:
252: my ($symb,$courseid,$domain,$name) = &Apache::lonxml::whichuser();
253: unless ($tsymb) {
254: $tsymb=$symb;
255: }
256: unless ($tuname) {
257: $tuname=$name;
258: $tudom=$domain;
259: $tcrsid=$courseid;
260: }
261:
262: my %reply=&Apache::lonnet::get('environment',
263: ['firstname','middlename','lastname','generation'],
264: $tudom,$tuname);
265: my $plainname=$reply{'firstname'}.' '.
266: $reply{'middlename'}.' '.
267: $reply{'lastname'}.' '.
268: $reply{'generation'};
269:
270: if ($target eq 'web') {
271: my %idhash=&Apache::lonnet::idrget($tudom,($tuname));
272: return
273: '<img align="right" src="/cgi-bin/barcode.png?encode='.$token.'" />'.
274: &mt('Checked out for').' '.$plainname.
275: '<br />'.&mt('User').': '.$tuname.' at '.$tudom.
276: '<br />'.&mt('ID').': '.$idhash{$tuname}.
277: '<br />'.&mt('CourseID').': '.$tcrsid.
278: '<br />'.&mt('Course').': '.$ENV{'course.'.$tcrsid.'.description'}.
279: '<br />'.&mt('DocID').': '.$token.
280: '<br />'.&mt('Time').': '.&Apache::lonlocal::locallocaltime().'<hr />';
281: } else {
282: return $token;
283: }
284: }
285:
286: sub fontsettings() {
287: my $headerstring='';
288: if (($ENV{'browser.os'} eq 'mac') && (!$ENV{'browser.mathml'})) {
289: $headerstring.=
290: '<meta Content-Type="text/html; charset=x-mac-roman">';
291: } elsif (!$ENV{'browser.mathml'} && $ENV{'browser.unicode'}) {
292: $headerstring.=
293: '<meta http-equiv="Content-Type" content="text/html; charset=utf-8" />';
294: }
295: return $headerstring;
296: }
297:
298: sub printalltags {
299: my $temp;
300: foreach $temp (sort keys %Apache::lonxml::alltags) {
301: &Apache::lonxml::debug("$temp -- ".
302: join(',',@{ $Apache::lonxml::alltags{$temp} }));
303: }
304: }
305:
306: sub xmlparse {
307: my ($request,$target,$content_file_string,$safeinit,%style_for_target) = @_;
308:
309: &setup_globals($request,$target);
310: &Apache::inputtags::initialize_inputtags();
311: &Apache::outputtags::initialize_outputtags();
312: &Apache::edit::initialize_edit();
313: &Apache::londefdef::initialize_londefdef();
314:
315: #
316: # do we have a course style file?
317: #
318:
319: if ($ENV{'request.course.id'} && $ENV{'request.state'} ne 'construct') {
320: my $bodytext=
321: $ENV{'course.'.$ENV{'request.course.id'}.'.default_xml_style'};
322: if ($bodytext) {
323: foreach my $file (split(',',$bodytext)) {
324: my $location=&Apache::lonnet::filelocation('',$file);
325: my $styletext=&Apache::lonnet::getfile($location);
326: if ($styletext ne '-1') {
327: %style_for_target = (%style_for_target,
328: &Apache::style::styleparser($target,$styletext));
329: }
330: }
331: }
332: } elsif ($ENV{'construct.style'} && ($ENV{'request.state'} eq 'construct')) {
333: my $location=&Apache::lonnet::filelocation('',$ENV{'construct.style'});
334: my $styletext=&Apache::lonnet::getfile($location);
335: if ($styletext ne '-1') {
336: %style_for_target = (%style_for_target,
337: &Apache::style::styleparser($target,$styletext));
338: }
339: }
340: #&printalltags();
341: my @pars = ();
342: my $pwd=$ENV{'request.filename'};
343: $pwd =~ s:/[^/]*$::;
344: &newparser(\@pars,\$content_file_string,$pwd);
345:
346: my $safeeval = new Safe;
347: my $safehole = new Safe::Hole;
348: &init_safespace($target,$safeeval,$safehole,$safeinit);
349: #-------------------- Redefinition of the target in the case of compound target
350:
351: ($target, my @tenta) = split('&&',$target);
352:
353: my @stack = ();
354: my @parstack = ();
355: &initdepth;
356:
357: my $finaloutput = &inner_xmlparse($target,\@stack,\@parstack,\@pars,
358: $safeeval,\%style_for_target);
359:
360: if ($ENV{'request.uri'}) {
361: &writeallows($ENV{'request.uri'});
362: }
363: &do_registered_ssi();
364: if ($Apache::lonxml::counter_changed) { &store_counter() }
365: return $finaloutput;
366: }
367:
368: sub htmlclean {
369: my ($raw,$full)=@_;
370:
371: my $tree = HTML::TreeBuilder->new;
372: $tree->ignore_unknown(0);
373:
374: $tree->parse($raw);
375:
376: my $output= $tree->as_HTML(undef,' ');
377:
378: $output=~s/\<(br|hr|img|meta|allow)(.*?)\>/\<$1$2 \/\>/gis;
379: $output=~s/\<\/(br|hr|img|meta|allow)\>//gis;
380: unless ($full) {
381: $output=~s/\<[\/]*(body|head|html)\>//gis;
382: }
383:
384: $tree = $tree->delete;
385:
386: return $output;
387: }
388:
389: sub latex_special_symbols {
390: my ($string,$where)=@_;
391: if ($where eq 'header') {
392: $string =~ s/(\\|_|\^)/ /g;
393: $string =~ s/(\$|%|\{|\})/\\$1/g;
394: $string =~ s/_/ /g;
395: $string=&Apache::lonprintout::character_chart($string);
396: # any & or # leftover should be safe to just escape
397: $string=~s/([^\\])\&/$1\\\&/g;
398: $string=~s/([^\\])\#/$1\\\#/g;
399: } else {
400: $string=~s/\\/\\ensuremath{\\backslash}/g;
401: $string=~s/([^\\]|^)\%/$1\\\%/g;
402: $string=~s/([^\\]|^)\$/$1\\\$/g;
403: $string=~s/([^\\])\_/$1\\_/g;
404: $string=~s/\$\$/\$\\\$/g;
405: $string=~s/\_\_/\_\\\_/g;
406: $string=~s/\#\#/\#\\\#/g;
407: $string=~s/([^\\]|^)(\~|\^)/$1\\$2\\strut /g;
408: $string=~s/(>|<)/\\ensuremath\{$1\}/g; #more or less
409: $string=&Apache::lonprintout::character_chart($string);
410: # any & or # leftover should be safe to just escape
411: $string=~s/([^\\]|^)\&/$1\\\&/g;
412: $string=~s/([^\\]|^)\#/$1\\\#/g;
413: $string=~s/\|/\$\\mid\$/g;
414: #single { or } How to escape?
415: }
416: return $string;
417: }
418:
419: sub inner_xmlparse {
420: my ($target,$stack,$parstack,$pars,$safeeval,$style_for_target)=@_;
421: my $finaloutput = '';
422: my $result;
423: my $token;
424: my $dontpop=0;
425: while ( $#$pars > -1 ) {
426: while ($token = $$pars['-1']->get_token) {
427: if (($token->[0] eq 'T') || ($token->[0] eq 'C') ) {
428: if ($metamode<1) {
429: my $text=$token->[1];
430: if ($token->[0] eq 'C' && $target eq 'tex') {
431: $text = '';
432: # $text = '%'.$text."\n";
433: }
434: $result.=$text;
435: }
436: } elsif (($token->[0] eq 'D')) {
437: if ($metamode<1 && $target eq 'web') {
438: my $text=$token->[1];
439: $result.=$text;
440: }
441: } elsif ($token->[0] eq 'PI') {
442: if ($metamode<1 && $target eq 'web') {
443: $result=$token->[2];
444: }
445: } elsif ($token->[0] eq 'S') {
446: # add tag to stack
447: push (@$stack,$token->[1]);
448: # add parameters list to another stack
449: push (@$parstack,&parstring($token));
450: &increasedepth($token);
451: if ($Apache::lonxml::usestyle &&
452: exists($$style_for_target{$token->[1]})) {
453: $Apache::lonxml::usestyle=0;
454: my $string=$$style_for_target{$token->[1]}.
455: '<LONCAPA_INTERNAL_TURN_STYLE_ON />';
456: &Apache::lonxml::newparser($pars,\$string);
457: $Apache::lonxml::style_values=$$parstack[-1];
458: $Apache::lonxml::style_end_values=$$parstack[-1];
459: } else {
460: $result = &callsub("start_$token->[1]", $target, $token, $stack,
461: $parstack, $pars, $safeeval, $style_for_target);
462: }
463: } elsif ($token->[0] eq 'E') {
464: if ($Apache::lonxml::usestyle &&
465: exists($$style_for_target{'/'."$token->[1]"})) {
466: $Apache::lonxml::usestyle=0;
467: my $string=$$style_for_target{'/'.$token->[1]}.
468: '<LONCAPA_INTERNAL_TURN_STYLE_ON end="'.$token->[1].'" />';
469: &Apache::lonxml::newparser($pars,\$string);
470: $Apache::lonxml::style_values=$Apache::lonxml::style_end_values;
471: $Apache::lonxml::style_end_values='';
472: $dontpop=1;
473: } else {
474: #clear out any tags that didn't end
475: while ($token->[1] ne $$stack['-1'] && ($#$stack > -1)) {
476: my $lasttag=$$stack[-1];
477: if ($token->[1] =~ /^\Q$lasttag\E$/i) {
478: &Apache::lonxml::warning('Using tag </'.$token->[1].'> on line '.$token->[3].' as end tag to <'.$$stack[-1].'>');
479: last;
480: } else {
481: &Apache::lonxml::warning('Found tag </'.$token->[1].'> on line '.$token->[3].' when looking for </'.$$stack[-1].'> in file');
482: &end_tag($stack,$parstack,$token);
483: }
484: }
485: $result = &callsub("end_$token->[1]", $target, $token, $stack,
486: $parstack, $pars,$safeeval, $style_for_target);
487: }
488: } else {
489: &Apache::lonxml::error("Unknown token event :$token->[0]:$token->[1]:");
490: }
491: #evaluate variable refs in result
492: if ($Apache::lonxml::post_evaluate &&$result ne "") {
493: my $extras;
494: if (!$Apache::lonxml::usestyle) {
495: $extras=$Apache::lonxml::style_values;
496: }
497: if ( $#$parstack > -1 ) {
498: $result=&Apache::run::evaluate($result,$safeeval,$extras.$$parstack[-1]);
499: } else {
500: $result= &Apache::run::evaluate($result,$safeeval,$extras);
501: }
502: }
503: $Apache::lonxml::post_evaluate=1;
504:
505: if (($token->[0] eq 'T') || ($token->[0] eq 'C') || ($token->[0] eq 'D') ) {
506: #Style file definitions should be correct
507: if ($target eq 'tex' && ($Apache::lonxml::usestyle)) {
508: $result=&latex_special_symbols($result);
509: }
510: }
511:
512: if ($Apache::lonxml::redirection) {
513: $Apache::lonxml::outputstack['-1'] .= $result;
514: } else {
515: $finaloutput.=$result;
516: }
517: $result = '';
518:
519: if ($token->[0] eq 'E' && !$dontpop) {
520: &end_tag($stack,$parstack,$token);
521: }
522: $dontpop=0;
523: }
524: if ($#$pars > -1) {
525: pop @$pars;
526: pop @Apache::lonxml::pwd;
527: }
528: }
529:
530: # if ($target eq 'meta') {
531: # $finaloutput.=&endredirection;
532: # }
533:
534:
535: if (($ENV{'QUERY_STRING'}) && ($target eq 'web')) {
536: $finaloutput=&afterburn($finaloutput);
537: }
538: return $finaloutput;
539: }
540:
541: ##
542: ## Looks to see if there is a subroutine defined for this tag. If so, call it,
543: ## otherwise do not call it as we do not know what it is.
544: ##
545: sub callsub {
546: my ($sub,$target,$token,$tagstack,$parstack,$parser,$safeeval,$style)=@_;
547: my $currentstring='';
548: my $nodefault;
549: {
550: my $sub1;
551: no strict 'refs';
552: my $tag=$token->[1];
553: # get utterly rid of extended html tags
554: if ($tag=~/^x\-/i) { return ''; }
555: my $space=$Apache::lonxml::alltags{$tag}[-1];
556: if (!$space) {
557: $tag=~tr/A-Z/a-z/;
558: $sub=~tr/A-Z/a-z/;
559: $space=$Apache::lonxml::alltags{$tag}[-1]
560: }
561:
562: my $deleted=0;
563: $Apache::lonxml::curdepth=join('_',@Apache::lonxml::depthcounter);
564: if (($token->[0] eq 'S') && ($target eq 'modified')) {
565: $deleted=&Apache::edit::handle_delete($space,$target,$token,$tagstack,
566: $parstack,$parser,$safeeval,
567: $style);
568: }
569: if (!$deleted) {
570: if ($space) {
571: #&Apache::lonxml::debug("Calling sub $sub in $space $metamode");
572: $sub1="$space\:\:$sub";
573: ($currentstring,$nodefault) = &$sub1($target,$token,$tagstack,
574: $parstack,$parser,$safeeval,
575: $style);
576: } else {
577: if ($target eq 'tex') {
578: # throw away tag name
579: return '';
580: }
581: #&Apache::lonxml::debug("NOT Calling sub $sub in $space $metamode");
582: if ($metamode <1) {
583: if (defined($token->[4]) && ($metamode < 1)) {
584: $currentstring = $token->[4];
585: } else {
586: $currentstring = $token->[2];
587: }
588: }
589: }
590: # &Apache::lonxml::debug("nodefalt:$nodefault:");
591: if ($currentstring eq '' && $nodefault eq '') {
592: if ($target eq 'edit') {
593: #&Apache::lonxml::debug("doing default edit for $token->[1]");
594: if ($token->[0] eq 'S') {
595: $currentstring = &Apache::edit::tag_start($target,$token);
596: } elsif ($token->[0] eq 'E') {
597: $currentstring = &Apache::edit::tag_end($target,$token);
598: }
599: } elsif ($target eq 'modified') {
600: if ($token->[0] eq 'S') {
601: $currentstring = $token->[4];
602: $currentstring.=&Apache::edit::handle_insert();
603: } elsif ($token->[0] eq 'E') {
604: $currentstring = $token->[2];
605: $currentstring.=&Apache::edit::handle_insertafter($token->[1]);
606: } else {
607: $currentstring = $token->[2];
608: }
609: }
610: }
611: }
612: use strict 'refs';
613: }
614: return $currentstring;
615: }
616:
617: sub setup_globals {
618: my ($request,$target)=@_;
619: $Apache::lonxml::request=$request;
620: $Apache::lonxml::registered = 0;
621: @Apache::lonxml::htmlareafields=();
622: $errorcount=0;
623: $warningcount=0;
624: $Apache::lonxml::default_homework_loaded=0;
625: $Apache::lonxml::usestyle=1;
626: &init_counter();
627: @Apache::lonxml::pwd=();
628: @Apache::lonxml::extlinks=();
629: @Apache::lonxml::ssi_info=();
630: $Apache::lonxml::post_evaluate=1;
631: $Apache::lonxml::warnings_error_header='';
632: if ($target eq 'meta') {
633: $Apache::lonxml::redirection = 0;
634: $Apache::lonxml::metamode = 1;
635: $Apache::lonxml::evaluate = 1;
636: $Apache::lonxml::import = 0;
637: } elsif ($target eq 'answer') {
638: $Apache::lonxml::redirection = 0;
639: $Apache::lonxml::metamode = 1;
640: $Apache::lonxml::evaluate = 1;
641: $Apache::lonxml::import = 1;
642: } elsif ($target eq 'grade') {
643: &startredirection;
644: $Apache::lonxml::metamode = 0;
645: $Apache::lonxml::evaluate = 1;
646: $Apache::lonxml::import = 1;
647: } elsif ($target eq 'modified') {
648: $Apache::lonxml::redirection = 0;
649: $Apache::lonxml::metamode = 0;
650: $Apache::lonxml::evaluate = 0;
651: $Apache::lonxml::import = 0;
652: } elsif ($target eq 'edit') {
653: $Apache::lonxml::redirection = 0;
654: $Apache::lonxml::metamode = 0;
655: $Apache::lonxml::evaluate = 0;
656: $Apache::lonxml::import = 0;
657: } elsif ($target eq 'analyze') {
658: $Apache::lonxml::redirection = 0;
659: $Apache::lonxml::metamode = 0;
660: $Apache::lonxml::evaluate = 1;
661: $Apache::lonxml::import = 1;
662: } else {
663: $Apache::lonxml::redirection = 0;
664: $Apache::lonxml::metamode = 0;
665: $Apache::lonxml::evaluate = 1;
666: $Apache::lonxml::import = 1;
667: }
668: }
669:
670: sub init_safespace {
671: my ($target,$safeeval,$safehole,$safeinit) = @_;
672: $safeeval->permit("entereval");
673: $safeeval->permit(":base_math");
674: $safeeval->permit("sort");
675: $safeeval->permit("time");
676: $safeeval->deny(":base_io");
677: $safehole->wrap(\&Apache::scripttag::xmlparse,$safeeval,'&xmlparse');
678: $safehole->wrap(\&Apache::outputtags::multipart,$safeeval,'&multipart');
679: $safehole->wrap(\&Apache::lonnet::EXT,$safeeval,'&EXT');
680: $safehole->wrap(\&Apache::chemresponse::chem_standard_order,$safeeval,
681: '&chem_standard_order');
682:
683: $safehole->wrap(\&Math::Cephes::asin,$safeeval,'&asin');
684: $safehole->wrap(\&Math::Cephes::acos,$safeeval,'&acos');
685: $safehole->wrap(\&Math::Cephes::atan,$safeeval,'&atan');
686: $safehole->wrap(\&Math::Cephes::sinh,$safeeval,'&sinh');
687: $safehole->wrap(\&Math::Cephes::cosh,$safeeval,'&cosh');
688: $safehole->wrap(\&Math::Cephes::tanh,$safeeval,'&tanh');
689: $safehole->wrap(\&Math::Cephes::asinh,$safeeval,'&asinh');
690: $safehole->wrap(\&Math::Cephes::acosh,$safeeval,'&acosh');
691: $safehole->wrap(\&Math::Cephes::atanh,$safeeval,'&atanh');
692: $safehole->wrap(\&Math::Cephes::erf,$safeeval,'&erf');
693: $safehole->wrap(\&Math::Cephes::erfc,$safeeval,'&erfc');
694: $safehole->wrap(\&Math::Cephes::j0,$safeeval,'&j0');
695: $safehole->wrap(\&Math::Cephes::j1,$safeeval,'&j1');
696: $safehole->wrap(\&Math::Cephes::jn,$safeeval,'&jn');
697: $safehole->wrap(\&Math::Cephes::jv,$safeeval,'&jv');
698: $safehole->wrap(\&Math::Cephes::y0,$safeeval,'&y0');
699: $safehole->wrap(\&Math::Cephes::y1,$safeeval,'&y1');
700: $safehole->wrap(\&Math::Cephes::yn,$safeeval,'&yn');
701: $safehole->wrap(\&Math::Cephes::yv,$safeeval,'&yv');
702:
703: $safehole->wrap(\&Math::Cephes::bdtr ,$safeeval,'&bdtr' );
704: $safehole->wrap(\&Math::Cephes::bdtrc ,$safeeval,'&bdtrc' );
705: $safehole->wrap(\&Math::Cephes::bdtri ,$safeeval,'&bdtri' );
706: $safehole->wrap(\&Math::Cephes::btdtr ,$safeeval,'&btdtr' );
707: $safehole->wrap(\&Math::Cephes::chdtr ,$safeeval,'&chdtr' );
708: $safehole->wrap(\&Math::Cephes::chdtrc,$safeeval,'&chdtrc');
709: $safehole->wrap(\&Math::Cephes::chdtri,$safeeval,'&chdtri');
710: $safehole->wrap(\&Math::Cephes::fdtr ,$safeeval,'&fdtr' );
711: $safehole->wrap(\&Math::Cephes::fdtrc ,$safeeval,'&fdtrc' );
712: $safehole->wrap(\&Math::Cephes::fdtri ,$safeeval,'&fdtri' );
713: $safehole->wrap(\&Math::Cephes::gdtr ,$safeeval,'&gdtr' );
714: $safehole->wrap(\&Math::Cephes::gdtrc ,$safeeval,'&gdtrc' );
715: $safehole->wrap(\&Math::Cephes::nbdtr ,$safeeval,'&nbdtr' );
716: $safehole->wrap(\&Math::Cephes::nbdtrc,$safeeval,'&nbdtrc');
717: $safehole->wrap(\&Math::Cephes::nbdtri,$safeeval,'&nbdtri');
718: $safehole->wrap(\&Math::Cephes::ndtr ,$safeeval,'&ndtr' );
719: $safehole->wrap(\&Math::Cephes::ndtri ,$safeeval,'&ndtri' );
720: $safehole->wrap(\&Math::Cephes::pdtr ,$safeeval,'&pdtr' );
721: $safehole->wrap(\&Math::Cephes::pdtrc ,$safeeval,'&pdtrc' );
722: $safehole->wrap(\&Math::Cephes::pdtri ,$safeeval,'&pdtri' );
723: $safehole->wrap(\&Math::Cephes::stdtr ,$safeeval,'&stdtr' );
724: $safehole->wrap(\&Math::Cephes::stdtri,$safeeval,'&stdtri');
725:
726: # $safehole->wrap(\&Math::Cephes::new_fract,$safeeval,'&new_fract');
727: # $safehole->wrap(\&Math::Cephes::radd,$safeeval,'&radd');
728: # $safehole->wrap(\&Math::Cephes::rsub,$safeeval,'&rsub');
729: # $safehole->wrap(\&Math::Cephes::rmul,$safeeval,'&rmul');
730: # $safehole->wrap(\&Math::Cephes::rdiv,$safeeval,'&rdiv');
731: # $safehole->wrap(\&Math::Cephes::euclid,$safeeval,'&euclid');
732:
733: $safehole->wrap(\&Math::Random::random_beta,$safeeval,'&math_random_beta');
734: $safehole->wrap(\&Math::Random::random_chi_square,$safeeval,'&math_random_chi_square');
735: $safehole->wrap(\&Math::Random::random_exponential,$safeeval,'&math_random_exponential');
736: $safehole->wrap(\&Math::Random::random_f,$safeeval,'&math_random_f');
737: $safehole->wrap(\&Math::Random::random_gamma,$safeeval,'&math_random_gamma');
738: $safehole->wrap(\&Math::Random::random_multivariate_normal,$safeeval,'&math_random_multivariate_normal');
739: $safehole->wrap(\&Math::Random::random_multinomial,$safeeval,'&math_random_multinomial');
740: $safehole->wrap(\&Math::Random::random_noncentral_chi_square,$safeeval,'&math_random_noncentral_chi_square');
741: $safehole->wrap(\&Math::Random::random_noncentral_f,$safeeval,'&math_random_noncentral_f');
742: $safehole->wrap(\&Math::Random::random_normal,$safeeval,'&math_random_normal');
743: $safehole->wrap(\&Math::Random::random_permutation,$safeeval,'&math_random_permutation');
744: $safehole->wrap(\&Math::Random::random_permuted_index,$safeeval,'&math_random_permuted_index');
745: $safehole->wrap(\&Math::Random::random_uniform,$safeeval,'&math_random_uniform');
746: $safehole->wrap(\&Math::Random::random_poisson,$safeeval,'&math_random_poisson');
747: $safehole->wrap(\&Math::Random::random_uniform_integer,$safeeval,'&math_random_uniform_integer');
748: $safehole->wrap(\&Math::Random::random_negative_binomial,$safeeval,'&math_random_negative_binomial');
749: $safehole->wrap(\&Math::Random::random_binomial,$safeeval,'&math_random_binomial');
750: $safehole->wrap(\&Math::Random::random_seed_from_phrase,$safeeval,'&random_seed_from_phrase');
751: $safehole->wrap(\&Math::Random::random_set_seed_from_phrase,$safeeval,'&random_set_seed_from_phrase');
752: $safehole->wrap(\&Math::Random::random_get_seed,$safeeval,'&random_get_seed');
753: $safehole->wrap(\&Math::Random::random_set_seed,$safeeval,'&random_set_seed');
754: $safehole->wrap(\&Apache::lonxml::error,$safeeval,'&LONCAPA_INTERNAL_ERROR');
755: $safehole->wrap(\&Apache::lonxml::debug,$safeeval,'&LONCAPA_INTERNAL_DEBUG');
756: $safehole->wrap(\&Apache::caparesponse::get_sigrange,$safeeval,'&LONCAPA_INTERNAL_get_sigrange');
757:
758: #need to inspect this class of ops
759: # $safeeval->deny(":base_orig");
760: $safeeval->permit("require");
761: $safeinit .= ';$external::target="'.$target.'";';
762: my $rndseed;
763: my ($symb,$courseid,$domain,$name) = &Apache::lonxml::whichuser();
764: $rndseed=&Apache::lonnet::rndseed($symb,$courseid,$domain,$name);
765: $safeinit .= ';$external::randomseed="'.$rndseed.'";';
766: &Apache::lonxml::debug("Setting rndseed to $rndseed");
767: &Apache::run::run($safeinit,$safeeval);
768:
769: }
770:
771: sub default_homework_load {
772: my ($safeeval)=@_;
773: &Apache::lonxml::debug('Loading default_homework');
774: my $default=&Apache::lonnet::getfile('/home/httpd/html/res/adm/includes/default_homework.lcpm');
775: if ($default eq -1) {
776: &Apache::lonxml::error("<b>Unable to find <i>default_homework.lcpm</i></b>");
777: } else {
778: &Apache::run::run($default,$safeeval);
779: $Apache::lonxml::default_homework_loaded=1;
780: }
781: }
782:
783: my $metamode_was;
784: sub startredirection {
785: if (!$Apache::lonxml::redirection) {
786: $metamode_was=$Apache::lonxml::metamode;
787: }
788: $Apache::lonxml::metamode=0;
789: $Apache::lonxml::redirection++;
790: push (@Apache::lonxml::outputstack, '');
791: }
792:
793: sub endredirection {
794: if (!$Apache::lonxml::redirection) {
795: &Apache::lonxml::error("Endredirection was called, before a startredirection, perhaps you have unbalanced tags. Some debuging information:".join ":",caller);
796: return '';
797: }
798: $Apache::lonxml::redirection--;
799: if (!$Apache::lonxml::redirection) {
800: $Apache::lonxml::metamode=$metamode_was;
801: }
802: pop @Apache::lonxml::outputstack;
803: }
804:
805: sub end_tag {
806: my ($tagstack,$parstack,$token)=@_;
807: pop(@$tagstack);
808: pop(@$parstack);
809: &decreasedepth($token);
810: }
811:
812: sub initdepth {
813: @Apache::lonxml::depthcounter=();
814: $Apache::lonxml::depth=-1;
815: $Apache::lonxml::olddepth=-1;
816: }
817:
818: my @timers;
819: my $lasttime;
820: sub increasedepth {
821: my ($token) = @_;
822: $Apache::lonxml::depth++;
823: $Apache::lonxml::depthcounter[$Apache::lonxml::depth]++;
824: if ($Apache::lonxml::depthcounter[$Apache::lonxml::depth]==1) {
825: $Apache::lonxml::olddepth=$Apache::lonxml::depth;
826: }
827: push(@timers,[&gettimeofday()]);
828: my $time=&tv_interval($lasttime);
829: $lasttime=[&gettimeofday()];
830: my $spacing=' 'x($Apache::lonxml::depth-1);
831: my $curdepth=join('_',@Apache::lonxml::depthcounter);
832: &Apache::lonxml::debug("s$spacing$Apache::lonxml::depth : $Apache::lonxml::olddepth : $curdepth : $token->[1] : $time : \n");
833: #print "<br />s $Apache::lonxml::depth : $Apache::lonxml::olddepth : $curdepth : $token->[1]\n";
834: }
835:
836: sub decreasedepth {
837: my ($token) = @_;
838: $Apache::lonxml::depth--;
839: if ($Apache::lonxml::depth<$Apache::lonxml::olddepth-1) {
840: $#Apache::lonxml::depthcounter--;
841: $Apache::lonxml::olddepth=$Apache::lonxml::depth+1;
842: }
843: if ( $Apache::lonxml::depth < -1) {
844: &Apache::lonxml::warning(&mt("Missing tags, unable to properly run file."));
845: $Apache::lonxml::depth='-1';
846: }
847: my $timer=pop(@timers);
848: my $time=&tv_interval($lasttime);
849: $lasttime=[&gettimeofday()];
850: my $spacing=' 'x$Apache::lonxml::depth;
851: my $curdepth=join('_',@Apache::lonxml::depthcounter);
852: &Apache::lonxml::debug("e$spacing$Apache::lonxml::depth : $Apache::lonxml::olddepth : $curdepth : $token->[1] : $time : ".&tv_interval($timer)."\n");
853: #print "<br />e $Apache::lonxml::depth : $Apache::lonxml::olddepth : $token->[1] : $curdepth\n";
854: }
855:
856: sub get_all_text_unbalanced {
857: #there is a copy of this in lonpublisher.pm
858: my($tag,$pars)= @_;
859: my $token;
860: my $result='';
861: $tag='<'.$tag.'>';
862: while ($token = $$pars[-1]->get_token) {
863: if (($token->[0] eq 'T')||($token->[0] eq 'C')||($token->[0] eq 'D')) {
864: $result.=$token->[1];
865: } elsif ($token->[0] eq 'PI') {
866: $result.=$token->[2];
867: } elsif ($token->[0] eq 'S') {
868: $result.=$token->[4];
869: } elsif ($token->[0] eq 'E') {
870: $result.=$token->[2];
871: }
872: if ($result =~ /\Q$tag\E/is) {
873: ($result,my $redo)=$result =~ /(.*)\Q$tag\E(.*)/is;
874: #&Apache::lonxml::debug('Got a winner with leftovers ::'.$2);
875: #&Apache::lonxml::debug('Result is :'.$1);
876: $redo=$tag.$redo;
877: &Apache::lonxml::newparser($pars,\$redo);
878: last;
879: }
880: }
881: return $result
882: }
883:
884: sub increment_counter {
885: my ($increment) = @_;
886: if (defined($increment) && $increment gt 0) {
887: $Apache::lonxml::counter+=$increment;
888: } else {
889: $Apache::lonxml::counter++;
890: }
891: $Apache::lonxml::counter_changed=1;
892: }
893:
894: sub init_counter {
895: if (defined($ENV{'form.counter'})) {
896: $Apache::lonxml::counter=$ENV{'form.counter'};
897: $Apache::lonxml::counter_changed=0;
898: } else {
899: $Apache::lonxml::counter=1;
900: $Apache::lonxml::counter_changed=1;
901: }
902: }
903:
904: sub store_counter {
905: &Apache::lonnet::appenv(('form.counter' => $Apache::lonxml::counter));
906: return '';
907: }
908:
909: sub get_all_text {
910: my($tag,$pars,$style)= @_;
911: my $gotfullstack=1;
912: if (ref($pars) ne 'ARRAY') {
913: $gotfullstack=0;
914: $pars=[$pars];
915: }
916: if (ref($style) ne 'HASH') {
917: $style={};
918: }
919: my $depth=0;
920: my $token;
921: my $result='';
922: if ( $tag =~ m:^/: ) {
923: my $tag=substr($tag,1);
924: #&Apache::lonxml::debug("have:$tag:");
925: my $top_empty=0;
926: while (($depth >=0) && ($#$pars > -1) && (!$top_empty)) {
927: while (($depth >=0) && ($token = $$pars[-1]->get_token)) {
928: #&Apache::lonxml::debug("e token:$token->[0]:$depth:$token->[1]:".$#$pars.":".$#Apache::lonxml::pwd);
929: if (($token->[0] eq 'T')||($token->[0] eq 'C')||($token->[0] eq 'D')) {
930: $result.=$token->[1];
931: } elsif ($token->[0] eq 'PI') {
932: $result.=$token->[2];
933: } elsif ($token->[0] eq 'S') {
934: if ($token->[1] =~ /^\Q$tag\E$/i) { $depth++; }
935: if ($token->[1] =~ /^LONCAPA_INTERNAL_TURN_STYLE_ON$/) { $Apache::lonxml::usestyle=1; }
936: if ($token->[1] =~ /^LONCAPA_INTERNAL_TURN_STYLE_OFF$/) { $Apache::lonxml::usestyle=0; }
937: $result.=$token->[4];
938: } elsif ($token->[0] eq 'E') {
939: if ( $token->[1] =~ /^\Q$tag\E$/i) { $depth--; }
940: #skip sending back the last end tag
941: if ($depth == 0 && exists($$style{'/'.$token->[1]}) && $Apache::lonxml::usestyle) {
942: my $string=
943: '<LONCAPA_INTERNAL_TURN_STYLE_OFF end="yes" />'.
944: $$style{'/'.$token->[1]}.
945: $token->[2].
946: '<LONCAPA_INTERNAL_TURN_STYLE_ON />';
947: &Apache::lonxml::newparser($pars,\$string);
948: #&Apache::lonxml::debug("reParsing $string");
949: next;
950: }
951: if ($depth > -1) {
952: $result.=$token->[2];
953: } else {
954: $$pars[-1]->unget_token($token);
955: }
956: }
957: }
958: if (($depth >=0) && ($#$pars == 0) ) { $top_empty=1; }
959: if (($depth >=0) && ($#$pars > 0) ) {
960: pop(@$pars);
961: pop(@Apache::lonxml::pwd);
962: }
963: }
964: if ($top_empty && $depth >= 0) {
965: #never found the end tag ran out of text, throw error send back blank
966: &error('Never found end tag for <'.$tag.
967: '> current string <pre>'.
968: &HTML::Entities::encode($result,'<>&"').
969: '</pre>');
970: if ($gotfullstack) {
971: my $newstring='</'.$tag.'>'.$result;
972: &Apache::lonxml::newparser($pars,\$newstring);
973: }
974: $result='';
975: }
976: } else {
977: while ($#$pars > -1) {
978: while ($token = $$pars[-1]->get_token) {
979: #&Apache::lonxml::debug("s token:$token->[0]:$depth:$token->[1]");
980: if (($token->[0] eq 'T')||($token->[0] eq 'C')||
981: ($token->[0] eq 'D')) {
982: $result.=$token->[1];
983: } elsif ($token->[0] eq 'PI') {
984: $result.=$token->[2];
985: } elsif ($token->[0] eq 'S') {
986: if ( $token->[1] =~ /^\Q$tag\E$/i) {
987: $$pars[-1]->unget_token($token); last;
988: } else {
989: $result.=$token->[4];
990: }
991: if ($token->[1] =~ /^LONCAPA_INTERNAL_TURN_STYLE_ON$/) { $Apache::lonxml::usestyle=1; }
992: if ($token->[1] =~ /^LONCAPA_INTERNAL_TURN_STYLE_OFF$/) { $Apache::lonxml::usestyle=0; }
993: } elsif ($token->[0] eq 'E') {
994: $result.=$token->[2];
995: }
996: }
997: if (($#$pars > 0) ) {
998: pop(@$pars);
999: pop(@Apache::lonxml::pwd);
1000: } else { last; }
1001: }
1002: }
1003: #&Apache::lonxml::debug("Exit:$result:");
1004: return $result
1005: }
1006:
1007: sub newparser {
1008: my ($parser,$contentref,$dir) = @_;
1009: push (@$parser,HTML::LCParser->new($contentref));
1010: $$parser['-1']->xml_mode('1');
1011: if ( $dir eq '' ) {
1012: push (@Apache::lonxml::pwd, $Apache::lonxml::pwd[$#Apache::lonxml::pwd]);
1013: } else {
1014: push (@Apache::lonxml::pwd, $dir);
1015: }
1016: }
1017:
1018: sub parstring {
1019: my ($token) = @_;
1020: my $temp='';
1021: foreach (@{$token->[3]}) {
1022: unless ($_=~/\W/) {
1023: my $val=$token->[2]->{$_};
1024: $val =~ s/([\%\@\\\"\'])/\\$1/g;
1025: #if ($val =~ m/^[\%\@]/) { $val="\\".$val; }
1026: $temp .= "my \$$_=\"$val\";";
1027: }
1028: }
1029: return $temp;
1030: }
1031:
1032: sub writeallows {
1033: unless ($#extlinks>=0) { return; }
1034: my $thisurl='/res/'.&Apache::lonnet::declutter(shift);
1035: if ($ENV{'httpref.'.$thisurl}) {
1036: $thisurl=$ENV{'httpref.'.$thisurl};
1037: }
1038: my $thisdir=$thisurl;
1039: $thisdir=~s/\/[^\/]+$//;
1040: my %httpref=();
1041: foreach (@extlinks) {
1042: $httpref{'httpref.'.
1043: &Apache::lonnet::hreflocation($thisdir,$_)}=$thisurl;
1044: }
1045: @extlinks=();
1046: &Apache::lonnet::appenv(%httpref);
1047: }
1048:
1049: sub register_ssi {
1050: my ($url,%form)=@_;
1051: push (@Apache::lonxml::ssi_info,{'url'=>$url,'form'=>\%form});
1052: return '';
1053: }
1054:
1055: sub do_registered_ssi {
1056: foreach my $info (@Apache::lonxml::ssi_info) {
1057: my %form=%{ $info->{'form'}};
1058: my $url=$info->{'url'};
1059: &Apache::lonnet::ssi($url,%form);
1060: }
1061: }
1062: #
1063: # Afterburner handles anchors, highlights and links
1064: #
1065: sub afterburn {
1066: my $result=shift;
1067: &Apache::loncommon::get_unprocessed_cgi($ENV{'QUERY_STRING'},
1068: ['highlight','anchor','link']);
1069: if ($ENV{'form.highlight'}) {
1070: foreach (split(/\,/,$ENV{'form.highlight'})) {
1071: my $anchorname=$_;
1072: my $matchthis=$anchorname;
1073: $matchthis=~s/\_+/\\s\+/g;
1074: $result=~s/(\Q$matchthis\E)/\<font color=\"red\"\>$1\<\/font\>/gs;
1075: }
1076: }
1077: if ($ENV{'form.link'}) {
1078: foreach (split(/\,/,$ENV{'form.link'})) {
1079: my ($anchorname,$linkurl)=split(/\>/,$_);
1080: my $matchthis=$anchorname;
1081: $matchthis=~s/\_+/\\s\+/g;
1082: $result=~s/(\Q$matchthis\E)/\<a href=\"$linkurl\"\>$1\<\/a\>/gs;
1083: }
1084: }
1085: if ($ENV{'form.anchor'}) {
1086: my $anchorname=$ENV{'form.anchor'};
1087: my $matchthis=$anchorname;
1088: $matchthis=~s/\_+/\\s\+/g;
1089: $result=~s/(\Q$matchthis\E)/\<a name=\"$anchorname\"\>$1\<\/a\>/s;
1090: $result.=(<<"ENDSCRIPT");
1091: <script type="text/javascript">
1092: document.location.hash='$anchorname';
1093: </script>
1094: ENDSCRIPT
1095: }
1096: return $result;
1097: }
1098:
1099: sub storefile {
1100: my ($file,$contents)=@_;
1101: &Apache::lonnet::correct_line_ends(\$contents);
1102: if (my $fh=Apache::File->new('>'.$file)) {
1103: print $fh $contents;
1104: $fh->close();
1105: return 1;
1106: } else {
1107: &warning("Unable to save file $file");
1108: return 0;
1109: }
1110: }
1111:
1112: sub createnewhtml {
1113: my $title=&mt('Title of document goes here');
1114: my $body=&mt('Body of document goes here');
1115: my $filecontents=(<<SIMPLECONTENT);
1116: <!DOCTYPE html PUBLIC "-//W3C//DTD XHTML 1.1//EN" "http://www.w3.org/TR/xhtml/11/DTD/xhtml11.dtd">
1117: <html>
1118: <head>
1119: <title>$title</title>
1120: </head>
1121: <body bgcolor="#FFFFFF">
1122: $body
1123: </body>
1124: </html>
1125: SIMPLECONTENT
1126: return $filecontents;
1127: }
1128:
1129: sub createnewsty {
1130: my $filecontents=(<<SIMPLECONTENT);
1131: <definetag name="">
1132: <render>
1133: <web></web>
1134: <tex></tex>
1135: </render>
1136: </definetag>
1137: SIMPLECONTENT
1138: return $filecontents;
1139: }
1140:
1141:
1142: sub inserteditinfo {
1143: my ($result,$filecontents,$filetype)=@_;
1144: $filecontents = &HTML::Entities::encode($filecontents,'<>&"');
1145: # my $editheader='<a href="#editsection">Edit below</a><hr />';
1146: my $xml_help = '';
1147: my $initialize='';
1148: if ($filetype eq 'html') {
1149: my $addbuttons=&Apache::lonhtmlcommon::htmlareaaddbuttons();
1150: $initialize=&Apache::lonhtmlcommon::htmlareaheaders().
1151: &Apache::lonhtmlcommon::spellheader().(<<FULLPAGE);
1152: <script type="text/javascript">
1153: $addbuttons
1154:
1155: HTMLArea.loadPlugin("FullPage");
1156:
1157: function initDocument() {
1158: var editor=new HTMLArea("filecont",config);
1159: editor.registerPlugin(FullPage);
1160: editor.generate();
1161: }
1162: </script>
1163: FULLPAGE
1164: $result=~s/\<body([^\>]*)\>/\<body onload="initDocument()" $1\>/i;
1165: $xml_help=&Apache::loncommon::helpLatexCheatsheet();
1166: }
1167: my $cleanbut = '';
1168: if ($filetype eq 'html') {
1169: $cleanbut='<input type="submit" name="attemptclean" value="'.
1170: &mt('Save and then attempt to clean HTML').'" />';
1171: }
1172: my $titledisplay=&display_title();
1173: my %lt=&Apache::lonlocal::texthash('st' => 'Save this',
1174: 'vi' => 'View',
1175: 'ed' => 'Edit');
1176: my $buttons=(<<BUTTONS);
1177: $cleanbut
1178: <input type="submit" name="savethisfile" accesskey="s" value="$lt{'st'}" />
1179: <input type="submit" name="viewmode" accesskey="v" value="$lt{'vi'}" />
1180: BUTTONS
1181: $buttons.=&Apache::lonhtmlcommon::spelllink('xmledit','filecont');
1182: $buttons.=&Apache::lonhtmlcommon::htmlareaselectactive('filecont');
1183: my $editfooter=(<<ENDFOOTER);
1184: $initialize
1185: <hr />
1186: <a name="editsection" />
1187: <form method="post" name="xmledit">
1188: $xml_help
1189: <input type="hidden" name="editmode" value="$lt{'ed'}" />
1190: $buttons<br />
1191: <textarea cols="80" rows="44" name="filecont" id="filecont">$filecontents</textarea>
1192: <br />$buttons
1193: <br />
1194: </form>
1195: $titledisplay
1196: </body>
1197: ENDFOOTER
1198: # $result=~s/(\<body[^\>]*\>)/$1$editheader/is;
1199: $result=~s/(\<\/body\>)/$editfooter/is;
1200: return $result;
1201: }
1202:
1203: sub get_target {
1204: my $viewgrades=&Apache::lonnet::allowed('vgr',$ENV{'request.course.id'});
1205: if ( $ENV{'request.state'} eq 'published') {
1206: if ( defined($ENV{'form.grade_target'})
1207: && ($viewgrades == 'F' )) {
1208: return ($ENV{'form.grade_target'});
1209: } elsif (defined($ENV{'form.grade_target'})) {
1210: if (($ENV{'form.grade_target'} eq 'web') ||
1211: ($ENV{'form.grade_target'} eq 'tex') ) {
1212: return $ENV{'form.grade_target'}
1213: } else {
1214: return 'web';
1215: }
1216: } else {
1217: return 'web';
1218: }
1219: } elsif ($ENV{'request.state'} eq 'construct') {
1220: if ( defined($ENV{'form.grade_target'})) {
1221: return ($ENV{'form.grade_target'});
1222: } else {
1223: return 'web';
1224: }
1225: } else {
1226: return 'web';
1227: }
1228: }
1229:
1230: sub handler {
1231: my $request=shift;
1232:
1233: my $target=&get_target();
1234:
1235: $Apache::lonxml::debug=$ENV{'user.debug'};
1236:
1237: if ($ENV{'browser.mathml'}) {
1238: &Apache::loncommon::content_type($request,'text/xml');
1239: } else {
1240: &Apache::loncommon::content_type($request,'text/html');
1241: }
1242: &Apache::loncommon::no_cache($request);
1243: $request->send_http_header;
1244:
1245: return OK if $request->header_only;
1246:
1247:
1248: my $file=&Apache::lonnet::filelocation("",$request->uri);
1249: my $filetype;
1250: if ($file =~ /\.sty$/) {
1251: $filetype='sty';
1252: } else {
1253: $filetype='html';
1254: }
1255: #
1256: # Edit action? Save file.
1257: #
1258: unless ($ENV{'request.state'} eq 'published') {
1259: if (($ENV{'form.savethisfile'}) || ($ENV{'form.attemptclean'})) {
1260: if (&storefile($file,$ENV{'form.filecont'})) {
1261: &Apache::lonxml::info("<font COLOR=\"#0000FF\">".
1262: &mt('Updated').": ".
1263: &Apache::lonlocal::locallocaltime(time).
1264: " </font>");
1265: }
1266: }
1267: }
1268: my %mystyle;
1269: my $result = '';
1270: my $filecontents=&Apache::lonnet::getfile($file);
1271: if ($filecontents eq -1) {
1272: my $bodytag=&Apache::loncommon::bodytag('File Error');
1273: my $fnf=&mt('File not found');
1274: $result=(<<ENDNOTFOUND);
1275: <html>
1276: <head>
1277: <title>$fnf</title>
1278: </head>
1279: $bodytag
1280: <b>$fnf: $file</b>
1281: </body>
1282: </html>
1283: ENDNOTFOUND
1284: $filecontents='';
1285: if ($ENV{'request.state'} ne 'published') {
1286: if ($filetype eq 'sty') {
1287: $filecontents=&createnewsty();
1288: } else {
1289: $filecontents=&createnewhtml();
1290: }
1291: $ENV{'form.editmode'}='Edit'; #force edit mode
1292: }
1293: } else {
1294: unless ($ENV{'request.state'} eq 'published') {
1295: if ($ENV{'form.attemptclean'}) {
1296: $filecontents=&htmlclean($filecontents,1);
1297: }
1298: #
1299: # we are in construction space, see if edit mode forced
1300: &Apache::loncommon::get_unprocessed_cgi
1301: ($ENV{'QUERY_STRING'},['editmode']);
1302: }
1303: if (!$ENV{'form.editmode'} || $ENV{'form.viewmode'}) {
1304: $result = &Apache::lonxml::xmlparse($request,$target,$filecontents,
1305: '',%mystyle);
1306: }
1307: }
1308:
1309: #
1310: # Edit action? Insert editing commands
1311: #
1312: unless ($ENV{'request.state'} eq 'published') {
1313: if ($ENV{'form.editmode'} && (!($ENV{'form.viewmode'}))) {
1314: my $displayfile=$request->uri;
1315: $displayfile=~s/^\/[^\/]*//;
1316: $result='<html><body bgcolor="#FFFFFF">'.
1317: &Apache::lonxml::message_location().'<h3>'.
1318: $displayfile.
1319: '</h3></body></html>';
1320: $result=&inserteditinfo($result,$filecontents,$filetype);
1321: }
1322: }
1323: if ($filetype eq 'html') { writeallows($request->uri); }
1324:
1325:
1326: &Apache::lonxml::add_messages(\$result);
1327: $request->print($result);
1328:
1329: return OK;
1330: }
1331:
1332: sub display_title {
1333: my $result;
1334: if ($ENV{'request.state'} eq 'construct') {
1335: my $title=&Apache::lonnet::gettitle();
1336: if (!defined($title) || $title eq '') {
1337: $title = $ENV{'request.filename'};
1338: $title = substr($title, rindex($title, '/') + 1);
1339: }
1340: $result = "<script type='text/javascript'>top.document.title = '$title - LON-CAPA Construction Space';</script>";
1341: }
1342: return $result;
1343: }
1344:
1345: sub debug {
1346: if ($Apache::lonxml::debug eq "1") {
1347: $|=1;
1348: my $request=$Apache::lonxml::request;
1349: if (!$request) { $request=Apache->request; }
1350: $request->print('<font size="-2"><pre>DEBUG:'.&HTML::Entities::encode($_[0],'<>&"')."</pre></font>\n");
1351: # &Apache::lonnet::logthis($_[0]);
1352: }
1353: }
1354:
1355: sub error {
1356: $errorcount++;
1357: if (($Apache::lonxml::debug eq 1) || ($ENV{'request.state'} eq 'construct') ) {
1358: # If printing in construction space, put the error inside <pre></pre>
1359: push(@Apache::lonxml::error_messages,
1360: $Apache::lonxml::warnings_error_header.
1361: "<b>ERROR:</b>".join("<br />\n",@_)."<br />\n");
1362: $Apache::lonxml::warnings_error_header='';
1363: } else {
1364: my $errormsg;
1365: my ($symb)=&Apache::lonnet::symbread();
1366: if ( !$symb ) {
1367: #public or browsers
1368: $errormsg=&mt("An error occured while processing this resource. The author has been notified.");
1369: }
1370: #notify author
1371: &Apache::lonmsg::author_res_msg($ENV{'request.filename'},join('<br />',@_));
1372: #notify course
1373: if ( $symb && $ENV{'request.course.id'} ) {
1374: my (undef,%users)=&Apache::lonfeedback::decide_receiver(undef,0,1,1,1);
1375: my $declutter=&Apache::lonnet::declutter($ENV{'request.filename'});
1376: my @userlist;
1377: foreach (keys %users) {
1378: my ($user,$domain) = split(/:/, $_);
1379: push(@userlist,"$user\@$domain");
1380: &Apache::lonmsg::user_normal_msg($user,$domain,
1381: "Error [$declutter]",join('<br />',@_));
1382: }
1383: if ($ENV{'request.role.adv'}) {
1384: $errormsg=&mt("An error occured while processing this resource. The course personnel ([_1]) and the author have been notified.",join(', ',@userlist));
1385: } else {
1386: $errormsg=&mt("An error occured while processing this resource. The instructor has been notified.");
1387: }
1388: }
1389: push(@Apache::lonxml::error_messages,"<b>$errormsg</b> <br />");
1390: }
1391: }
1392:
1393: sub warning {
1394: $warningcount++;
1395:
1396: if ($ENV{'form.grade_target'} ne 'tex') {
1397: if ($ENV{'request.state'} eq 'construct' || $Apache::lonxml::debug) {
1398: my $request=$Apache::lonxml::request;
1399: if (!$request) { $request=Apache->request; }
1400: push(@Apache::lonxml::warning_messages,
1401: $Apache::lonxml::warnings_error_header.
1402: "<b>W</b>ARNING<b>:</b>".join('<br />',@_)."<br />\n");
1403: $Apache::lonxml::warnings_error_header='';
1404: }
1405: }
1406: }
1407:
1408: sub info {
1409: if ($ENV{'form.grade_target'} ne 'tex'
1410: && $ENV{'request.state'} eq 'construct') {
1411: push(@Apache::lonxml::info_messages,join('<br />',@_)."<br />\n");
1412: }
1413: }
1414:
1415: sub message_location {
1416: return '__LONCAPA_INTERNAL_MESSAGE_LOCATION__';
1417: }
1418:
1419: sub add_messages {
1420: my ($msg)=@_;
1421: my $result=join(' ',
1422: @Apache::lonxml::info_messages,
1423: @Apache::lonxml::error_messages,
1424: @Apache::lonxml::warning_messages);
1425: undef(@Apache::lonxml::info_messages);
1426: undef(@Apache::lonxml::error_messages);
1427: undef(@Apache::lonxml::warning_messages);
1428: $$msg=~s/__LONCAPA_INTERNAL_MESSAGE_LOCATION__/$result/;
1429: $$msg=~s/__LONCAPA_INTERNAL_MESSAGE_LOCATION__//g;
1430: }
1431:
1432: sub get_param {
1433: my ($param,$parstack,$safeeval,$context,$case_insensitive) = @_;
1434: if ( ! $context ) { $context = -1; }
1435: my $args ='';
1436: if ( $#$parstack > (-2-$context) ) { $args=$$parstack[$context]; }
1437: if ( ! $Apache::lonxml::usestyle ) {
1438: $args=$Apache::lonxml::style_values.$args;
1439: }
1440: if ( ! $args ) { return undef; }
1441: if ( $case_insensitive ) {
1442: if ($args =~ s/(my \$)(\Q$param\E)(=\")/$1.lc($2).$3/ei) {
1443: return &Apache::run::run("{$args;".'return $'.$param.'}',
1444: $safeeval); #'
1445: } else {
1446: return undef;
1447: }
1448: } else {
1449: if ( $args =~ /my \$\Q$param\E=\"/ ) {
1450: return &Apache::run::run("{$args;".'return $'.$param.'}',
1451: $safeeval); #'
1452: } else {
1453: return undef;
1454: }
1455: }
1456: }
1457:
1458: sub get_param_var {
1459: my ($param,$parstack,$safeeval,$context,$case_insensitive) = @_;
1460: if ( ! $context ) { $context = -1; }
1461: my $args ='';
1462: if ( $#$parstack > (-2-$context) ) { $args=$$parstack[$context]; }
1463: if ( ! $Apache::lonxml::usestyle ) {
1464: $args=$Apache::lonxml::style_values.$args;
1465: }
1466: &Apache::lonxml::debug("Args are $args param is $param");
1467: if ($case_insensitive) {
1468: if (! ($args=~s/(my \$)(\Q$param\E)(=\")/$1.lc($2).$3/ei)) {
1469: return undef;
1470: }
1471: } elsif ( $args !~ /my \$\Q$param\E=\"/ ) { return undef; }
1472: my $value=&Apache::run::run("{$args;".'return $'.$param.'}',$safeeval); #'
1473: &Apache::lonxml::debug("first run is $value");
1474: if ($value =~ /^[\$\@\%]\w+$/) {
1475: &Apache::lonxml::debug("doing second");
1476: my @result=&Apache::run::run("return $value",$safeeval,1);
1477: if (!defined($result[0])) {
1478: return $value
1479: } else {
1480: if (wantarray) { return @result; } else { return $result[0]; }
1481: }
1482: } else {
1483: return $value;
1484: }
1485: }
1486:
1487: sub register_insert {
1488: my @data = split /\n/, &Apache::lonnet::getfile('/home/httpd/lonTabs/insertlist.tab');
1489: my $i;
1490: my $tagnum=0;
1491: my @order;
1492: for ($i=0;$i < $#data; $i++) {
1493: my $line = $data[$i];
1494: if ( $line =~ /^\#/ || $line =~ /^\s*\n/) { next; }
1495: if ( $line =~ /TABLE/ ) { last; }
1496: my ($tag,$descrip,$color,$function,$show,$helpfile,$helpdesc) = split(/,/, $line);
1497: if ($tag) {
1498: $insertlist{"$tagnum.tag"} = $tag;
1499: $insertlist{"$tagnum.description"} = $descrip;
1500: $insertlist{"$tagnum.color"} = $color;
1501: $insertlist{"$tagnum.function"} = $function;
1502: if (!defined($show)) { $show='yes'; }
1503: $insertlist{"$tagnum.show"}= $show;
1504: $insertlist{"$tagnum.helpfile"} = $helpfile;
1505: $insertlist{"$tagnum.helpdesc"} = $helpdesc;
1506: $insertlist{"$tag.num"}=$tagnum;
1507: $tagnum++;
1508: }
1509: }
1510: $i++; #skipping TABLE line
1511: $tagnum = 0;
1512: for (;$i < $#data;$i++) {
1513: my $line = $data[$i];
1514: my ($mnemonic,@which) = split(/ +/,$line);
1515: my $tag = $insertlist{"$tagnum.tag"};
1516: for (my $j=0;$j <=$#which;$j++) {
1517: if ( $which[$j] eq 'Y' ) {
1518: if ($insertlist{"$j.show"} ne 'no') {
1519: push(@{ $insertlist{"$tag.which"} },$j);
1520: }
1521: }
1522: }
1523: $tagnum++;
1524: }
1525: }
1526:
1527: sub description {
1528: my ($token)=@_;
1529: my $tagnum;
1530: my $tag=$token->[1];
1531: foreach my $namespace (reverse @Apache::lonxml::namespace) {
1532: my $testtag=$namespace.'::'.$tag;
1533: $tagnum=$insertlist{"$testtag.num"};
1534: if (defined($tagnum)) { last; }
1535: }
1536: if (!defined ($tagnum)) { $tagnum=$Apache::lonxml::insertlist{"$tag.num"}; }
1537: return $insertlist{$tagnum.'.description'};
1538: }
1539:
1540: # Returns a list containing the help file, and the description
1541: sub helpinfo {
1542: my ($token)=@_;
1543: my $tagnum;
1544: my $tag=$token->[1];
1545: foreach my $namespace (reverse @Apache::lonxml::namespace) {
1546: my $testtag=$namespace.'::'.$tag;
1547: $tagnum=$insertlist{"$testtag.num"};
1548: if (defined($tagnum)) { last; }
1549: }
1550: if (!defined ($tagnum)) { $tagnum=$Apache::lonxml::insertlist{"$tag.num"}; }
1551: return ($insertlist{$tagnum.'.helpfile'}, $insertlist{$tagnum.'.helpdesc'});
1552: }
1553:
1554: # ----------------------------------------------------------------- whichuser
1555: # returns a list of $symb, $courseid, $domain, $name that is correct for
1556: # calls to lonnet functions for this setup.
1557: # - looks for form.grade_ parameters
1558: sub whichuser {
1559: my ($passedsymb)=@_;
1560: my ($symb,$courseid,$domain,$name,$publicuser);
1561: if (defined($ENV{'form.grade_symb'})) {
1562: my $tmp_courseid=$ENV{'form.grade_courseid'};
1563: my $allowed=&Apache::lonnet::allowed('vgr',$tmp_courseid);
1564: if ($allowed) {
1565: $symb=$ENV{'form.grade_symb'};
1566: $courseid=$ENV{'form.grade_courseid'};
1567: $domain=$ENV{'form.grade_domain'};
1568: $name=$ENV{'form.grade_username'};
1569: }
1570: } else {
1571: if (!$passedsymb) {
1572: $symb=&Apache::lonnet::symbread();
1573: } else {
1574: $symb=$passedsymb;
1575: }
1576: $courseid=$ENV{'request.course.id'};
1577: $domain=$ENV{'user.domain'};
1578: $name=$ENV{'user.name'};
1579: if ($name eq 'public' && $domain eq 'public') {
1580: if (!defined($ENV{'form.username'})) {
1581: $ENV{'form.username'}.=time.rand(10000000);
1582: }
1583: $name.=$ENV{'form.username'};
1584: }
1585: }
1586: return ($symb,$courseid,$domain,$name,$publicuser);
1587: }
1588:
1589: 1;
1590: __END__
1591:
1592:
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