1: # The LearningOnline Network with CAPA
2: # XML Parser Module
3: #
4: # $Id: lonxml.pm,v 1.367 2005/03/23 22:02:32 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: $Apache::lonxml::warnings_error_header='';
150:
151: sub xmlbegin {
152: my ($style)=@_;
153: my $output='';
154: @htmlareafields=();
155: if ($ENV{'browser.mathml'}) {
156: $output='<?xml version="1.0"?>'
157: #.'<?xml-stylesheet type="text/css" href="/adm/MathML/mathml.css"?>'."\n"
158: # .'<!DOCTYPE html SYSTEM "/adm/MathML/mathml.dtd" '
159:
160: # .'<!DOCTYPE html PUBLIC "-//W3C//DTD XHTML 1.0 Transitional//EN" "http://www.w3.org/TR/xhtml1/DTD/xhtml1-transitional.dtd" [<!ENTITY mathns "http://www.w3.org/1998/Math/MathML">] >'
161: .'<!DOCTYPE html PUBLIC "-//W3C//DTD XHTML 1.1 plus MathML 2.0 plus SVG 1.1//EN" "http://www.w3.org/2002/04/xhtml-math-svg/xhtml-math-svg.dtd">'
162: .'<html xmlns:math="http://www.w3.org/1998/Math/MathML" '
163: .'xmlns="http://www.w3.org/1999/xhtml">';
164: } else {
165: $output='<!DOCTYPE html PUBLIC "-//W3C//DTD XHTML 1.0 Transitional//EN" "http://www.w3.org/TR/xhtml1/DTD/xhtml1-transitional.dtd"><html>';
166: }
167: if ($style eq 'encode') {
168: $output=&HTML::Entities::encode($output,'<>&"');
169: }
170: return $output;
171: }
172:
173: sub xmlend {
174: my ($target,$parser)=@_;
175: my $mode='xml';
176: my $status='OPEN';
177: if ($Apache::lonhomework::parsing_a_problem) {
178: $mode='problem';
179: $status=$Apache::inputtags::status[-1];
180: }
181: my $discussion;
182: &Apache::loncommon::get_unprocessed_cgi
183: ($ENV{'query_string'},['LONCAPA_INTERNAL_no_discussion']);
184: if (! exists($ENV{'form.LONCAPA_INTERNAL_no_discussion'}) ||
185: $ENV{'form.LONCAPA_INTERNAL_no_discussion'} ne 'true') {
186: $discussion=&Apache::lonfeedback::list_discussion($mode,$status);
187: }
188: if ($target eq 'tex') {
189: $discussion.='<tex>\keephidden{ENDOFPROBLEM}\vskip 0.5mm\noindent\makebox[\textwidth/$number_of_columns][b]{\hrulefill}\end{document}</tex>';
190: &Apache::lonxml::newparser($parser,\$discussion,'');
191: return '';
192: } else {
193: return $discussion.&Apache::loncommon::endbodytag();
194: }
195: }
196:
197: sub tokeninputfield {
198: my $defhost=$Apache::lonnet::perlvar{'lonHostID'};
199: $defhost=~tr/a-z/A-Z/;
200: return (<<ENDINPUTFIELD)
201: <script type="text/javascript">
202: function updatetoken() {
203: var comp=new Array;
204: var barcode=unescape(document.tokeninput.barcode.value);
205: comp=barcode.split('*');
206: if (typeof(comp[0])!="undefined") {
207: document.tokeninput.codeone.value=comp[0];
208: }
209: if (typeof(comp[1])!="undefined") {
210: document.tokeninput.codetwo.value=comp[1];
211: }
212: if (typeof(comp[2])!="undefined") {
213: comp[2]=comp[2].toUpperCase();
214: document.tokeninput.codethree.value=comp[2];
215: }
216: document.tokeninput.barcode.value='';
217: }
218: </script>
219: <form method="post" name="tokeninput">
220: <table border="2" bgcolor="#FFFFBB">
221: <tr><th>DocID Checkin</th></tr>
222: <tr><td>
223: <table>
224: <tr>
225: <td>Scan in Barcode</td>
226: <td><input type="text" size="22" name="barcode"
227: onChange="updatetoken()"/></td>
228: </tr>
229: <tr><td><i>or</i> Type in DocID</td>
230: <td>
231: <input type="text" size="5" name="codeone" />
232: <b><font size="+2">*</font></b>
233: <input type="text" size="5" name="codetwo" />
234: <b><font size="+2">*</font></b>
235: <input type="text" size="10" name="codethree" value="$defhost"
236: onChange="this.value=this.value.toUpperCase()" />
237: </td></tr>
238: </table>
239: </td></tr>
240: <tr><td><input type="submit" value="Check in DocID" /></td></tr>
241: </table>
242: </form>
243: ENDINPUTFIELD
244: }
245:
246: sub maketoken {
247: my ($symb,$tuname,$tudom,$tcrsid)=@_;
248: unless ($symb) {
249: $symb=&Apache::lonnet::symbread();
250: }
251: unless ($tuname) {
252: $tuname=$ENV{'user.name'};
253: $tudom=$ENV{'user.domain'};
254: $tcrsid=$ENV{'request.course.id'};
255: }
256:
257: return &Apache::lonnet::checkout($symb,$tuname,$tudom,$tcrsid);
258: }
259:
260: sub printtokenheader {
261: my ($target,$token,$tsymb,$tcrsid,$tudom,$tuname)=@_;
262: unless ($token) { return ''; }
263:
264: my ($symb,$courseid,$domain,$name) = &Apache::lonxml::whichuser();
265: unless ($tsymb) {
266: $tsymb=$symb;
267: }
268: unless ($tuname) {
269: $tuname=$name;
270: $tudom=$domain;
271: $tcrsid=$courseid;
272: }
273:
274: my %reply=&Apache::lonnet::get('environment',
275: ['firstname','middlename','lastname','generation'],
276: $tudom,$tuname);
277: my $plainname=$reply{'firstname'}.' '.
278: $reply{'middlename'}.' '.
279: $reply{'lastname'}.' '.
280: $reply{'generation'};
281:
282: if ($target eq 'web') {
283: my %idhash=&Apache::lonnet::idrget($tudom,($tuname));
284: return
285: '<img align="right" src="/cgi-bin/barcode.png?encode='.$token.'" />'.
286: &mt('Checked out for').' '.$plainname.
287: '<br />'.&mt('User').': '.$tuname.' at '.$tudom.
288: '<br />'.&mt('ID').': '.$idhash{$tuname}.
289: '<br />'.&mt('CourseID').': '.$tcrsid.
290: '<br />'.&mt('Course').': '.$ENV{'course.'.$tcrsid.'.description'}.
291: '<br />'.&mt('DocID').': '.$token.
292: '<br />'.&mt('Time').': '.&Apache::lonlocal::locallocaltime().'<hr />';
293: } else {
294: return $token;
295: }
296: }
297:
298: sub fontsettings {
299: my $headerstring='';
300: if (($ENV{'browser.os'} eq 'mac') && (!$ENV{'browser.mathml'})) {
301: $headerstring.=
302: '<meta Content-Type="text/html; charset=x-mac-roman" />';
303: } elsif (!$ENV{'browser.mathml'} && $ENV{'browser.unicode'}) {
304: $headerstring.=
305: '<meta http-equiv="Content-Type" content="text/html; charset=utf-8" />';
306: }
307: return $headerstring;
308: }
309:
310: sub printalltags {
311: my $temp;
312: foreach $temp (sort keys %Apache::lonxml::alltags) {
313: &Apache::lonxml::debug("$temp -- ".
314: join(',',@{ $Apache::lonxml::alltags{$temp} }));
315: }
316: }
317:
318: sub xmlparse {
319: my ($request,$target,$content_file_string,$safeinit,%style_for_target) = @_;
320:
321: &setup_globals($request,$target);
322: &Apache::inputtags::initialize_inputtags();
323: &Apache::outputtags::initialize_outputtags();
324: &Apache::edit::initialize_edit();
325: &Apache::londefdef::initialize_londefdef();
326:
327: #
328: # do we have a course style file?
329: #
330:
331: if ($ENV{'request.course.id'} && $ENV{'request.state'} ne 'construct') {
332: my $bodytext=
333: $ENV{'course.'.$ENV{'request.course.id'}.'.default_xml_style'};
334: if ($bodytext) {
335: foreach my $file (split(',',$bodytext)) {
336: my $location=&Apache::lonnet::filelocation('',$file);
337: my $styletext=&Apache::lonnet::getfile($location);
338: if ($styletext ne '-1') {
339: %style_for_target = (%style_for_target,
340: &Apache::style::styleparser($target,$styletext));
341: }
342: }
343: }
344: } elsif ($ENV{'construct.style'} && ($ENV{'request.state'} eq 'construct')) {
345: my $location=&Apache::lonnet::filelocation('',$ENV{'construct.style'});
346: my $styletext=&Apache::lonnet::getfile($location);
347: if ($styletext ne '-1') {
348: %style_for_target = (%style_for_target,
349: &Apache::style::styleparser($target,$styletext));
350: }
351: }
352: #&printalltags();
353: my @pars = ();
354: my $pwd=$ENV{'request.filename'};
355: $pwd =~ s:/[^/]*$::;
356: &newparser(\@pars,\$content_file_string,$pwd);
357:
358: my $safeeval = new Safe;
359: my $safehole = new Safe::Hole;
360: &init_safespace($target,$safeeval,$safehole,$safeinit);
361: #-------------------- Redefinition of the target in the case of compound target
362:
363: ($target, my @tenta) = split('&&',$target);
364:
365: my @stack = ();
366: my @parstack = ();
367: &initdepth();
368: &init_alarm();
369: my $finaloutput = &inner_xmlparse($target,\@stack,\@parstack,\@pars,
370: $safeeval,\%style_for_target);
371:
372: if ($ENV{'request.uri'}) {
373: &writeallows($ENV{'request.uri'});
374: }
375: &do_registered_ssi();
376: if ($Apache::lonxml::counter_changed) { &store_counter() }
377: if ($ENV{'form.return_only_error_and_warning_counts'}) {
378: return "$errorcount:$warningcount";
379: }
380: return $finaloutput;
381: }
382:
383: sub htmlclean {
384: my ($raw,$full)=@_;
385: # Take care of CRLF etc
386:
387: $raw=~s/\r\f/\n/gs; $raw=~s/\f\r/\n/gs;
388: $raw=~s/\r\n/\n/gs; $raw=~s/\n\r/\n/gs;
389: $raw=~s/\f/\n/gs; $raw=~s/\r/\n/gs;
390: $raw=~s/\&\#10\;/\n/gs; $raw=~s/\&\#13\;/\n/gs;
391:
392: # Generate empty tags, remove wrong end tags
393: $raw=~s/\<(br|hr|img|meta|allow|basefont)([^\>\/]*?)\>/\<$1$2 \/\>/gis;
394: $raw=~s/\<\/(br|hr|img|meta|allow|basefont)\>//gis;
395: unless ($full) {
396: $raw=~s/\<[\/]*(body|head|html)\>//gis;
397: }
398: # Make standard tags lowercase
399: foreach ('html','body','head','meta','h1','h2','h3','h4','b','i','m',
400: 'table','tr','td','th','p','br','hr','img','embed','font',
401: 'a','strong','center','title','basefont','li','ol','ul',
402: 'input','select','form','option','script','pre') {
403: $raw=~s/\<$_\s*\>/\<$_\>/gis;
404: $raw=~s/\<\/$_\s*\>/<\/$_\>/gis;
405: $raw=~s/\<$_\s([^\>]*)\>/<$_ $1\>/gis;
406: }
407: return $raw;
408: }
409:
410: sub latex_special_symbols {
411: my ($string,$where)=@_;
412: if ($where eq 'header') {
413: $string =~ s/(\\|_|\^)/ /g;
414: $string =~ s/(\$|%|\{|\})/\\$1/g;
415: $string =~ s/_/ /g;
416: $string=&Apache::lonprintout::character_chart($string);
417: # any & or # leftover should be safe to just escape
418: $string=~s/([^\\])\&/$1\\\&/g;
419: $string=~s/([^\\])\#/$1\\\#/g;
420: } else {
421: $string=~s/\\/\\ensuremath{\\backslash}/g;
422: $string=~s/\\\%|\%/\\\%/g;
423: $string=~s/\\{|{/\\{/g;
424: $string=~s/\\}|}/\\}/g;
425: $string=~s/\\\$|\$/\\\$/g;
426: $string=~s/\\\_|\_/\\\_/g;
427: $string=~s/([^\\]|^)(\~|\^)/$1\\$2\\strut /g;
428: $string=~s/(>|<)/\\ensuremath\{$1\}/g; #more or less
429: $string=&Apache::lonprintout::character_chart($string);
430: # any & or # leftover should be safe to just escape
431: $string=~s/\\\&|\&/\\\&/g;
432: $string=~s/\\\#|\#/\\\#/g;
433: $string=~s/\|/\$\\mid\$/g;
434: #single { or } How to escape?
435: }
436: return $string;
437: }
438:
439: sub inner_xmlparse {
440: my ($target,$stack,$parstack,$pars,$safeeval,$style_for_target)=@_;
441: my $finaloutput = '';
442: my $result;
443: my $token;
444: my $dontpop=0;
445: while ( $#$pars > -1 ) {
446: while ($token = $$pars['-1']->get_token) {
447: if (($token->[0] eq 'T') || ($token->[0] eq 'C') ) {
448: if ($metamode<1) {
449: my $text=$token->[1];
450: if ($token->[0] eq 'C' && $target eq 'tex') {
451: $text = '';
452: # $text = '%'.$text."\n";
453: }
454: $result.=$text;
455: }
456: } elsif (($token->[0] eq 'D')) {
457: if ($metamode<1 && $target eq 'web') {
458: my $text=$token->[1];
459: $result.=$text;
460: }
461: } elsif ($token->[0] eq 'PI') {
462: if ($metamode<1 && $target eq 'web') {
463: $result=$token->[2];
464: }
465: } elsif ($token->[0] eq 'S') {
466: # add tag to stack
467: push (@$stack,$token->[1]);
468: # add parameters list to another stack
469: push (@$parstack,&parstring($token));
470: &increasedepth($token);
471: if ($Apache::lonxml::usestyle &&
472: exists($$style_for_target{$token->[1]})) {
473: $Apache::lonxml::usestyle=0;
474: my $string=$$style_for_target{$token->[1]}.
475: '<LONCAPA_INTERNAL_TURN_STYLE_ON />';
476: &Apache::lonxml::newparser($pars,\$string);
477: $Apache::lonxml::style_values=$$parstack[-1];
478: $Apache::lonxml::style_end_values=$$parstack[-1];
479: } else {
480: $result = &callsub("start_$token->[1]", $target, $token, $stack,
481: $parstack, $pars, $safeeval, $style_for_target);
482: }
483: } elsif ($token->[0] eq 'E') {
484: if ($Apache::lonxml::usestyle &&
485: exists($$style_for_target{'/'."$token->[1]"})) {
486: $Apache::lonxml::usestyle=0;
487: my $string=$$style_for_target{'/'.$token->[1]}.
488: '<LONCAPA_INTERNAL_TURN_STYLE_ON end="'.$token->[1].'" />';
489: &Apache::lonxml::newparser($pars,\$string);
490: $Apache::lonxml::style_values=$Apache::lonxml::style_end_values;
491: $Apache::lonxml::style_end_values='';
492: $dontpop=1;
493: } else {
494: #clear out any tags that didn't end
495: while ($token->[1] ne $$stack['-1'] && ($#$stack > -1)) {
496: my $lasttag=$$stack[-1];
497: if ($token->[1] =~ /^\Q$lasttag\E$/i) {
498: &Apache::lonxml::warning('Using tag </'.$token->[1].'> on line '.$token->[3].' as end tag to <'.$$stack[-1].'>');
499: last;
500: } else {
501: &Apache::lonxml::warning('Found tag </'.$token->[1].'> on line '.$token->[3].' when looking for </'.$$stack[-1].'> in file');
502: &end_tag($stack,$parstack,$token);
503: }
504: }
505: $result = &callsub("end_$token->[1]", $target, $token, $stack,
506: $parstack, $pars,$safeeval, $style_for_target);
507: }
508: } else {
509: &Apache::lonxml::error("Unknown token event :$token->[0]:$token->[1]:");
510: }
511: #evaluate variable refs in result
512: if ($Apache::lonxml::post_evaluate &&$result ne "") {
513: my $extras;
514: if (!$Apache::lonxml::usestyle) {
515: $extras=$Apache::lonxml::style_values;
516: }
517: if ( $#$parstack > -1 ) {
518: $result=&Apache::run::evaluate($result,$safeeval,$extras.$$parstack[-1]);
519: } else {
520: $result= &Apache::run::evaluate($result,$safeeval,$extras);
521: }
522: }
523: $Apache::lonxml::post_evaluate=1;
524:
525: if (($token->[0] eq 'T') || ($token->[0] eq 'C') || ($token->[0] eq 'D') ) {
526: #Style file definitions should be correct
527: if ($target eq 'tex' && ($Apache::lonxml::usestyle)) {
528: $result=&latex_special_symbols($result);
529: }
530: }
531:
532: if ($Apache::lonxml::redirection) {
533: $Apache::lonxml::outputstack['-1'] .= $result;
534: } else {
535: $finaloutput.=$result;
536: }
537: $result = '';
538:
539: if ($token->[0] eq 'E' && !$dontpop) {
540: &end_tag($stack,$parstack,$token);
541: }
542: $dontpop=0;
543: }
544: if ($#$pars > -1) {
545: pop @$pars;
546: pop @Apache::lonxml::pwd;
547: }
548: }
549:
550: # if ($target eq 'meta') {
551: # $finaloutput.=&endredirection;
552: # }
553:
554:
555: if (($ENV{'QUERY_STRING'}) && ($target eq 'web')) {
556: $finaloutput=&afterburn($finaloutput);
557: }
558: return $finaloutput;
559: }
560:
561: ##
562: ## Looks to see if there is a subroutine defined for this tag. If so, call it,
563: ## otherwise do not call it as we do not know what it is.
564: ##
565: sub callsub {
566: my ($sub,$target,$token,$tagstack,$parstack,$parser,$safeeval,$style)=@_;
567: my $currentstring='';
568: my $nodefault;
569: {
570: my $sub1;
571: no strict 'refs';
572: my $tag=$token->[1];
573: # get utterly rid of extended html tags
574: if ($tag=~/^x\-/i) { return ''; }
575: my $space=$Apache::lonxml::alltags{$tag}[-1];
576: if (!$space) {
577: $tag=~tr/A-Z/a-z/;
578: $sub=~tr/A-Z/a-z/;
579: $space=$Apache::lonxml::alltags{$tag}[-1]
580: }
581:
582: my $deleted=0;
583: $Apache::lonxml::curdepth=join('_',@Apache::lonxml::depthcounter);
584: if (($token->[0] eq 'S') && ($target eq 'modified')) {
585: $deleted=&Apache::edit::handle_delete($space,$target,$token,$tagstack,
586: $parstack,$parser,$safeeval,
587: $style);
588: }
589: if (!$deleted) {
590: if ($space) {
591: #&Apache::lonxml::debug("Calling sub $sub in $space $metamode");
592: $sub1="$space\:\:$sub";
593: ($currentstring,$nodefault) = &$sub1($target,$token,$tagstack,
594: $parstack,$parser,$safeeval,
595: $style);
596: } else {
597: if ($target eq 'tex') {
598: # throw away tag name
599: return '';
600: }
601: #&Apache::lonxml::debug("NOT Calling sub $sub in $space $metamode");
602: if ($metamode <1) {
603: if (defined($token->[4]) && ($metamode < 1)) {
604: $currentstring = $token->[4];
605: } else {
606: $currentstring = $token->[2];
607: }
608: }
609: }
610: # &Apache::lonxml::debug("nodefalt:$nodefault:");
611: if ($currentstring eq '' && $nodefault eq '') {
612: if ($target eq 'edit') {
613: #&Apache::lonxml::debug("doing default edit for $token->[1]");
614: if ($token->[0] eq 'S') {
615: $currentstring = &Apache::edit::tag_start($target,$token);
616: } elsif ($token->[0] eq 'E') {
617: $currentstring = &Apache::edit::tag_end($target,$token);
618: }
619: } elsif ($target eq 'modified') {
620: if ($token->[0] eq 'S') {
621: $currentstring = $token->[4];
622: $currentstring.=&Apache::edit::handle_insert();
623: } elsif ($token->[0] eq 'E') {
624: $currentstring = $token->[2];
625: $currentstring.=&Apache::edit::handle_insertafter($token->[1]);
626: } else {
627: $currentstring = $token->[2];
628: }
629: }
630: }
631: }
632: use strict 'refs';
633: }
634: return $currentstring;
635: }
636:
637: sub setup_globals {
638: my ($request,$target)=@_;
639: $Apache::lonxml::request=$request;
640: $Apache::lonxml::registered = 0;
641: @Apache::lonxml::htmlareafields=();
642: $errorcount=0;
643: $warningcount=0;
644: $Apache::lonxml::default_homework_loaded=0;
645: $Apache::lonxml::usestyle=1;
646: &init_counter();
647: @Apache::lonxml::pwd=();
648: @Apache::lonxml::extlinks=();
649: @Apache::lonxml::ssi_info=();
650: $Apache::lonxml::post_evaluate=1;
651: $Apache::lonxml::warnings_error_header='';
652: if ($target eq 'meta') {
653: $Apache::lonxml::redirection = 0;
654: $Apache::lonxml::metamode = 1;
655: $Apache::lonxml::evaluate = 1;
656: $Apache::lonxml::import = 0;
657: } elsif ($target eq 'answer') {
658: $Apache::lonxml::redirection = 0;
659: $Apache::lonxml::metamode = 1;
660: $Apache::lonxml::evaluate = 1;
661: $Apache::lonxml::import = 1;
662: } elsif ($target eq 'grade') {
663: &startredirection;
664: $Apache::lonxml::metamode = 0;
665: $Apache::lonxml::evaluate = 1;
666: $Apache::lonxml::import = 1;
667: } elsif ($target eq 'modified') {
668: $Apache::lonxml::redirection = 0;
669: $Apache::lonxml::metamode = 0;
670: $Apache::lonxml::evaluate = 0;
671: $Apache::lonxml::import = 0;
672: } elsif ($target eq 'edit') {
673: $Apache::lonxml::redirection = 0;
674: $Apache::lonxml::metamode = 0;
675: $Apache::lonxml::evaluate = 0;
676: $Apache::lonxml::import = 0;
677: } elsif ($target eq 'analyze') {
678: $Apache::lonxml::redirection = 0;
679: $Apache::lonxml::metamode = 0;
680: $Apache::lonxml::evaluate = 1;
681: $Apache::lonxml::import = 1;
682: } else {
683: $Apache::lonxml::redirection = 0;
684: $Apache::lonxml::metamode = 0;
685: $Apache::lonxml::evaluate = 1;
686: $Apache::lonxml::import = 1;
687: }
688: }
689:
690: sub init_safespace {
691: my ($target,$safeeval,$safehole,$safeinit) = @_;
692: $safeeval->permit("entereval");
693: $safeeval->permit(":base_math");
694: $safeeval->permit("sort");
695: $safeeval->permit("time");
696: $safeeval->deny(":base_io");
697: $safehole->wrap(\&Apache::scripttag::xmlparse,$safeeval,'&xmlparse');
698: $safehole->wrap(\&Apache::outputtags::multipart,$safeeval,'&multipart');
699: $safehole->wrap(\&Apache::lonnet::EXT,$safeeval,'&EXT');
700: $safehole->wrap(\&Apache::chemresponse::chem_standard_order,$safeeval,
701: '&chem_standard_order');
702:
703: $safehole->wrap(\&Math::Cephes::asin,$safeeval,'&asin');
704: $safehole->wrap(\&Math::Cephes::acos,$safeeval,'&acos');
705: $safehole->wrap(\&Math::Cephes::atan,$safeeval,'&atan');
706: $safehole->wrap(\&Math::Cephes::sinh,$safeeval,'&sinh');
707: $safehole->wrap(\&Math::Cephes::cosh,$safeeval,'&cosh');
708: $safehole->wrap(\&Math::Cephes::tanh,$safeeval,'&tanh');
709: $safehole->wrap(\&Math::Cephes::asinh,$safeeval,'&asinh');
710: $safehole->wrap(\&Math::Cephes::acosh,$safeeval,'&acosh');
711: $safehole->wrap(\&Math::Cephes::atanh,$safeeval,'&atanh');
712: $safehole->wrap(\&Math::Cephes::erf,$safeeval,'&erf');
713: $safehole->wrap(\&Math::Cephes::erfc,$safeeval,'&erfc');
714: $safehole->wrap(\&Math::Cephes::j0,$safeeval,'&j0');
715: $safehole->wrap(\&Math::Cephes::j1,$safeeval,'&j1');
716: $safehole->wrap(\&Math::Cephes::jn,$safeeval,'&jn');
717: $safehole->wrap(\&Math::Cephes::jv,$safeeval,'&jv');
718: $safehole->wrap(\&Math::Cephes::y0,$safeeval,'&y0');
719: $safehole->wrap(\&Math::Cephes::y1,$safeeval,'&y1');
720: $safehole->wrap(\&Math::Cephes::yn,$safeeval,'&yn');
721: $safehole->wrap(\&Math::Cephes::yv,$safeeval,'&yv');
722:
723: $safehole->wrap(\&Math::Cephes::bdtr ,$safeeval,'&bdtr' );
724: $safehole->wrap(\&Math::Cephes::bdtrc ,$safeeval,'&bdtrc' );
725: $safehole->wrap(\&Math::Cephes::bdtri ,$safeeval,'&bdtri' );
726: $safehole->wrap(\&Math::Cephes::btdtr ,$safeeval,'&btdtr' );
727: $safehole->wrap(\&Math::Cephes::chdtr ,$safeeval,'&chdtr' );
728: $safehole->wrap(\&Math::Cephes::chdtrc,$safeeval,'&chdtrc');
729: $safehole->wrap(\&Math::Cephes::chdtri,$safeeval,'&chdtri');
730: $safehole->wrap(\&Math::Cephes::fdtr ,$safeeval,'&fdtr' );
731: $safehole->wrap(\&Math::Cephes::fdtrc ,$safeeval,'&fdtrc' );
732: $safehole->wrap(\&Math::Cephes::fdtri ,$safeeval,'&fdtri' );
733: $safehole->wrap(\&Math::Cephes::gdtr ,$safeeval,'&gdtr' );
734: $safehole->wrap(\&Math::Cephes::gdtrc ,$safeeval,'&gdtrc' );
735: $safehole->wrap(\&Math::Cephes::nbdtr ,$safeeval,'&nbdtr' );
736: $safehole->wrap(\&Math::Cephes::nbdtrc,$safeeval,'&nbdtrc');
737: $safehole->wrap(\&Math::Cephes::nbdtri,$safeeval,'&nbdtri');
738: $safehole->wrap(\&Math::Cephes::ndtr ,$safeeval,'&ndtr' );
739: $safehole->wrap(\&Math::Cephes::ndtri ,$safeeval,'&ndtri' );
740: $safehole->wrap(\&Math::Cephes::pdtr ,$safeeval,'&pdtr' );
741: $safehole->wrap(\&Math::Cephes::pdtrc ,$safeeval,'&pdtrc' );
742: $safehole->wrap(\&Math::Cephes::pdtri ,$safeeval,'&pdtri' );
743: $safehole->wrap(\&Math::Cephes::stdtr ,$safeeval,'&stdtr' );
744: $safehole->wrap(\&Math::Cephes::stdtri,$safeeval,'&stdtri');
745:
746: # $safehole->wrap(\&Math::Cephes::new_fract,$safeeval,'&new_fract');
747: # $safehole->wrap(\&Math::Cephes::radd,$safeeval,'&radd');
748: # $safehole->wrap(\&Math::Cephes::rsub,$safeeval,'&rsub');
749: # $safehole->wrap(\&Math::Cephes::rmul,$safeeval,'&rmul');
750: # $safehole->wrap(\&Math::Cephes::rdiv,$safeeval,'&rdiv');
751: # $safehole->wrap(\&Math::Cephes::euclid,$safeeval,'&euclid');
752:
753: $safehole->wrap(\&Math::Random::random_beta,$safeeval,'&math_random_beta');
754: $safehole->wrap(\&Math::Random::random_chi_square,$safeeval,'&math_random_chi_square');
755: $safehole->wrap(\&Math::Random::random_exponential,$safeeval,'&math_random_exponential');
756: $safehole->wrap(\&Math::Random::random_f,$safeeval,'&math_random_f');
757: $safehole->wrap(\&Math::Random::random_gamma,$safeeval,'&math_random_gamma');
758: $safehole->wrap(\&Math::Random::random_multivariate_normal,$safeeval,'&math_random_multivariate_normal');
759: $safehole->wrap(\&Math::Random::random_multinomial,$safeeval,'&math_random_multinomial');
760: $safehole->wrap(\&Math::Random::random_noncentral_chi_square,$safeeval,'&math_random_noncentral_chi_square');
761: $safehole->wrap(\&Math::Random::random_noncentral_f,$safeeval,'&math_random_noncentral_f');
762: $safehole->wrap(\&Math::Random::random_normal,$safeeval,'&math_random_normal');
763: $safehole->wrap(\&Math::Random::random_permutation,$safeeval,'&math_random_permutation');
764: $safehole->wrap(\&Math::Random::random_permuted_index,$safeeval,'&math_random_permuted_index');
765: $safehole->wrap(\&Math::Random::random_uniform,$safeeval,'&math_random_uniform');
766: $safehole->wrap(\&Math::Random::random_poisson,$safeeval,'&math_random_poisson');
767: $safehole->wrap(\&Math::Random::random_uniform_integer,$safeeval,'&math_random_uniform_integer');
768: $safehole->wrap(\&Math::Random::random_negative_binomial,$safeeval,'&math_random_negative_binomial');
769: $safehole->wrap(\&Math::Random::random_binomial,$safeeval,'&math_random_binomial');
770: $safehole->wrap(\&Math::Random::random_seed_from_phrase,$safeeval,'&random_seed_from_phrase');
771: $safehole->wrap(\&Math::Random::random_set_seed_from_phrase,$safeeval,'&random_set_seed_from_phrase');
772: $safehole->wrap(\&Math::Random::random_get_seed,$safeeval,'&random_get_seed');
773: $safehole->wrap(\&Math::Random::random_set_seed,$safeeval,'&random_set_seed');
774: $safehole->wrap(\&Apache::lonxml::error,$safeeval,'&LONCAPA_INTERNAL_ERROR');
775: $safehole->wrap(\&Apache::lonxml::debug,$safeeval,'&LONCAPA_INTERNAL_DEBUG');
776: $safehole->wrap(\&Apache::caparesponse::get_sigrange,$safeeval,'&LONCAPA_INTERNAL_get_sigrange');
777:
778: #need to inspect this class of ops
779: # $safeeval->deny(":base_orig");
780: $safeeval->permit("require");
781: $safeinit .= ';$external::target="'.$target.'";';
782: my $rndseed;
783: my ($symb,$courseid,$domain,$name) = &Apache::lonxml::whichuser();
784: $rndseed=&Apache::lonnet::rndseed($symb,$courseid,$domain,$name);
785: $safeinit .= ';$external::randomseed="'.$rndseed.'";';
786: &Apache::lonxml::debug("Setting rndseed to $rndseed");
787: &Apache::run::run($safeinit,$safeeval);
788:
789: }
790:
791: sub default_homework_load {
792: my ($safeeval)=@_;
793: &Apache::lonxml::debug('Loading default_homework');
794: my $default=&Apache::lonnet::getfile('/home/httpd/html/res/adm/includes/default_homework.lcpm');
795: if ($default eq -1) {
796: &Apache::lonxml::error("<b>Unable to find <i>default_homework.lcpm</i></b>");
797: } else {
798: &Apache::run::run($default,$safeeval);
799: $Apache::lonxml::default_homework_loaded=1;
800: }
801: }
802:
803: {
804: my $alarm_depth;
805: sub init_alarm {
806: alarm(0);
807: $alarm_depth=0;
808: }
809:
810: sub start_alarm {
811: if ($alarm_depth<1) {
812: my $old=alarm($Apache::lonnet::perlvar{'lonScriptTimeout'});
813: if ($old) {
814: &Apache::lonxml::error("Cancelled an alarm of $old, this shouldn't occur.");
815: }
816: }
817: $alarm_depth++;
818: }
819:
820: sub end_alarm {
821: $alarm_depth--;
822: if ($alarm_depth<1) { alarm(0); }
823: }
824: }
825: my $metamode_was;
826: sub startredirection {
827: if (!$Apache::lonxml::redirection) {
828: $metamode_was=$Apache::lonxml::metamode;
829: }
830: $Apache::lonxml::metamode=0;
831: $Apache::lonxml::redirection++;
832: push (@Apache::lonxml::outputstack, '');
833: }
834:
835: sub endredirection {
836: if (!$Apache::lonxml::redirection) {
837: &Apache::lonxml::error("Endredirection was called, before a startredirection, perhaps you have unbalanced tags. Some debuging information:".join ":",caller);
838: return '';
839: }
840: $Apache::lonxml::redirection--;
841: if (!$Apache::lonxml::redirection) {
842: $Apache::lonxml::metamode=$metamode_was;
843: }
844: pop @Apache::lonxml::outputstack;
845: }
846:
847: sub end_tag {
848: my ($tagstack,$parstack,$token)=@_;
849: pop(@$tagstack);
850: pop(@$parstack);
851: &decreasedepth($token);
852: }
853:
854: sub initdepth {
855: @Apache::lonxml::depthcounter=();
856: $Apache::lonxml::depth=-1;
857: $Apache::lonxml::olddepth=-1;
858: }
859:
860: my @timers;
861: my $lasttime;
862: sub increasedepth {
863: my ($token) = @_;
864: $Apache::lonxml::depth++;
865: $Apache::lonxml::depthcounter[$Apache::lonxml::depth]++;
866: if ($Apache::lonxml::depthcounter[$Apache::lonxml::depth]==1) {
867: $Apache::lonxml::olddepth=$Apache::lonxml::depth;
868: }
869: my $time;
870: if ($Apache::lonxml::debug eq "1") {
871: push(@timers,[&gettimeofday()]);
872: $time=&tv_interval($lasttime);
873: $lasttime=[&gettimeofday()];
874: }
875: my $spacing=' 'x($Apache::lonxml::depth-1);
876: my $curdepth=join('_',@Apache::lonxml::depthcounter);
877: &Apache::lonxml::debug("s$spacing$Apache::lonxml::depth : $Apache::lonxml::olddepth : $curdepth : $token->[1] : $time : \n");
878: #print "<br />s $Apache::lonxml::depth : $Apache::lonxml::olddepth : $curdepth : $token->[1]\n";
879: }
880:
881: sub decreasedepth {
882: my ($token) = @_;
883: $Apache::lonxml::depth--;
884: if ($Apache::lonxml::depth<$Apache::lonxml::olddepth-1) {
885: $#Apache::lonxml::depthcounter--;
886: $Apache::lonxml::olddepth=$Apache::lonxml::depth+1;
887: }
888: if ( $Apache::lonxml::depth < -1) {
889: &Apache::lonxml::warning(&mt("Missing tags, unable to properly run file."));
890: $Apache::lonxml::depth='-1';
891: }
892: my ($timer,$time);
893: if ($Apache::lonxml::debug eq "1") {
894: $timer=pop(@timers);
895: $time=&tv_interval($lasttime);
896: $lasttime=[&gettimeofday()];
897: }
898: my $spacing=' 'x$Apache::lonxml::depth;
899: my $curdepth=join('_',@Apache::lonxml::depthcounter);
900: &Apache::lonxml::debug("e$spacing$Apache::lonxml::depth : $Apache::lonxml::olddepth : $curdepth : $token->[1] : $time : ".&tv_interval($timer)."\n");
901: #print "<br />e $Apache::lonxml::depth : $Apache::lonxml::olddepth : $token->[1] : $curdepth\n";
902: }
903:
904: sub get_all_text_unbalanced {
905: #there is a copy of this in lonpublisher.pm
906: my($tag,$pars)= @_;
907: my $token;
908: my $result='';
909: $tag='<'.$tag.'>';
910: while ($token = $$pars[-1]->get_token) {
911: if (($token->[0] eq 'T')||($token->[0] eq 'C')||($token->[0] eq 'D')) {
912: $result.=$token->[1];
913: } elsif ($token->[0] eq 'PI') {
914: $result.=$token->[2];
915: } elsif ($token->[0] eq 'S') {
916: $result.=$token->[4];
917: } elsif ($token->[0] eq 'E') {
918: $result.=$token->[2];
919: }
920: if ($result =~ /\Q$tag\E/is) {
921: ($result,my $redo)=$result =~ /(.*)\Q$tag\E(.*)/is;
922: #&Apache::lonxml::debug('Got a winner with leftovers ::'.$2);
923: #&Apache::lonxml::debug('Result is :'.$1);
924: $redo=$tag.$redo;
925: &Apache::lonxml::newparser($pars,\$redo);
926: last;
927: }
928: }
929: return $result
930: }
931:
932: sub increment_counter {
933: my ($increment) = @_;
934: if (defined($increment) && $increment gt 0) {
935: $Apache::lonxml::counter+=$increment;
936: } else {
937: $Apache::lonxml::counter++;
938: }
939: $Apache::lonxml::counter_changed=1;
940: }
941:
942: sub init_counter {
943: if (defined($ENV{'form.counter'})) {
944: $Apache::lonxml::counter=$ENV{'form.counter'};
945: $Apache::lonxml::counter_changed=0;
946: } else {
947: $Apache::lonxml::counter=1;
948: $Apache::lonxml::counter_changed=1;
949: }
950: }
951:
952: sub store_counter {
953: &Apache::lonnet::appenv(('form.counter' => $Apache::lonxml::counter));
954: return '';
955: }
956:
957: sub get_all_text {
958: my($tag,$pars,$style)= @_;
959: my $gotfullstack=1;
960: if (ref($pars) ne 'ARRAY') {
961: $gotfullstack=0;
962: $pars=[$pars];
963: }
964: if (ref($style) ne 'HASH') {
965: $style={};
966: }
967: my $depth=0;
968: my $token;
969: my $result='';
970: if ( $tag =~ m:^/: ) {
971: my $tag=substr($tag,1);
972: #&Apache::lonxml::debug("have:$tag:");
973: my $top_empty=0;
974: while (($depth >=0) && ($#$pars > -1) && (!$top_empty)) {
975: while (($depth >=0) && ($token = $$pars[-1]->get_token)) {
976: #&Apache::lonxml::debug("e token:$token->[0]:$depth:$token->[1]:".$#$pars.":".$#Apache::lonxml::pwd);
977: if (($token->[0] eq 'T')||($token->[0] eq 'C')||($token->[0] eq 'D')) {
978: $result.=$token->[1];
979: } elsif ($token->[0] eq 'PI') {
980: $result.=$token->[2];
981: } elsif ($token->[0] eq 'S') {
982: if ($token->[1] =~ /^\Q$tag\E$/i) { $depth++; }
983: if ($token->[1] =~ /^LONCAPA_INTERNAL_TURN_STYLE_ON$/) { $Apache::lonxml::usestyle=1; }
984: if ($token->[1] =~ /^LONCAPA_INTERNAL_TURN_STYLE_OFF$/) { $Apache::lonxml::usestyle=0; }
985: $result.=$token->[4];
986: } elsif ($token->[0] eq 'E') {
987: if ( $token->[1] =~ /^\Q$tag\E$/i) { $depth--; }
988: #skip sending back the last end tag
989: if ($depth == 0 && exists($$style{'/'.$token->[1]}) && $Apache::lonxml::usestyle) {
990: my $string=
991: '<LONCAPA_INTERNAL_TURN_STYLE_OFF end="yes" />'.
992: $$style{'/'.$token->[1]}.
993: $token->[2].
994: '<LONCAPA_INTERNAL_TURN_STYLE_ON />';
995: &Apache::lonxml::newparser($pars,\$string);
996: #&Apache::lonxml::debug("reParsing $string");
997: next;
998: }
999: if ($depth > -1) {
1000: $result.=$token->[2];
1001: } else {
1002: $$pars[-1]->unget_token($token);
1003: }
1004: }
1005: }
1006: if (($depth >=0) && ($#$pars == 0) ) { $top_empty=1; }
1007: if (($depth >=0) && ($#$pars > 0) ) {
1008: pop(@$pars);
1009: pop(@Apache::lonxml::pwd);
1010: }
1011: }
1012: if ($top_empty && $depth >= 0) {
1013: #never found the end tag ran out of text, throw error send back blank
1014: &error('Never found end tag for <'.$tag.
1015: '> current string <pre>'.
1016: &HTML::Entities::encode($result,'<>&"').
1017: '</pre>');
1018: if ($gotfullstack) {
1019: my $newstring='</'.$tag.'>'.$result;
1020: &Apache::lonxml::newparser($pars,\$newstring);
1021: }
1022: $result='';
1023: }
1024: } else {
1025: while ($#$pars > -1) {
1026: while ($token = $$pars[-1]->get_token) {
1027: #&Apache::lonxml::debug("s token:$token->[0]:$depth:$token->[1]");
1028: if (($token->[0] eq 'T')||($token->[0] eq 'C')||
1029: ($token->[0] eq 'D')) {
1030: $result.=$token->[1];
1031: } elsif ($token->[0] eq 'PI') {
1032: $result.=$token->[2];
1033: } elsif ($token->[0] eq 'S') {
1034: if ( $token->[1] =~ /^\Q$tag\E$/i) {
1035: $$pars[-1]->unget_token($token); last;
1036: } else {
1037: $result.=$token->[4];
1038: }
1039: if ($token->[1] =~ /^LONCAPA_INTERNAL_TURN_STYLE_ON$/) { $Apache::lonxml::usestyle=1; }
1040: if ($token->[1] =~ /^LONCAPA_INTERNAL_TURN_STYLE_OFF$/) { $Apache::lonxml::usestyle=0; }
1041: } elsif ($token->[0] eq 'E') {
1042: $result.=$token->[2];
1043: }
1044: }
1045: if (($#$pars > 0) ) {
1046: pop(@$pars);
1047: pop(@Apache::lonxml::pwd);
1048: } else { last; }
1049: }
1050: }
1051: #&Apache::lonxml::debug("Exit:$result:");
1052: return $result
1053: }
1054:
1055: sub newparser {
1056: my ($parser,$contentref,$dir) = @_;
1057: push (@$parser,HTML::LCParser->new($contentref));
1058: $$parser[-1]->xml_mode(1);
1059: $$parser[-1]->marked_sections(1);
1060: if ( $dir eq '' ) {
1061: push (@Apache::lonxml::pwd, $Apache::lonxml::pwd[$#Apache::lonxml::pwd]);
1062: } else {
1063: push (@Apache::lonxml::pwd, $dir);
1064: }
1065: }
1066:
1067: sub parstring {
1068: my ($token) = @_;
1069: my $temp='';
1070: foreach (@{$token->[3]}) {
1071: unless ($_=~/\W/) {
1072: my $val=$token->[2]->{$_};
1073: $val =~ s/([\%\@\\\"\'])/\\$1/g;
1074: $val =~ s/(\$[^{a-zA-Z_])/\\$1/g;
1075: $val =~ s/(\$)$/\\$1/;
1076: #if ($val =~ m/^[\%\@]/) { $val="\\".$val; }
1077: $temp .= "my \$$_=\"$val\";";
1078: }
1079: }
1080: return $temp;
1081: }
1082:
1083: sub writeallows {
1084: unless ($#extlinks>=0) { return; }
1085: my $thisurl='/res/'.&Apache::lonnet::declutter(shift);
1086: if ($ENV{'httpref.'.$thisurl}) {
1087: $thisurl=$ENV{'httpref.'.$thisurl};
1088: }
1089: my $thisdir=$thisurl;
1090: $thisdir=~s/\/[^\/]+$//;
1091: my %httpref=();
1092: foreach (@extlinks) {
1093: $httpref{'httpref.'.
1094: &Apache::lonnet::hreflocation($thisdir,$_)}=$thisurl;
1095: }
1096: @extlinks=();
1097: &Apache::lonnet::appenv(%httpref);
1098: }
1099:
1100: sub register_ssi {
1101: my ($url,%form)=@_;
1102: push (@Apache::lonxml::ssi_info,{'url'=>$url,'form'=>\%form});
1103: return '';
1104: }
1105:
1106: sub do_registered_ssi {
1107: foreach my $info (@Apache::lonxml::ssi_info) {
1108: my %form=%{ $info->{'form'}};
1109: my $url=$info->{'url'};
1110: &Apache::lonnet::ssi($url,%form);
1111: }
1112: }
1113: #
1114: # Afterburner handles anchors, highlights and links
1115: #
1116: sub afterburn {
1117: my $result=shift;
1118: &Apache::loncommon::get_unprocessed_cgi($ENV{'QUERY_STRING'},
1119: ['highlight','anchor','link']);
1120: if ($ENV{'form.highlight'}) {
1121: foreach (split(/\,/,$ENV{'form.highlight'})) {
1122: my $anchorname=$_;
1123: my $matchthis=$anchorname;
1124: $matchthis=~s/\_+/\\s\+/g;
1125: $result=~s/(\Q$matchthis\E)/\<font color=\"red\"\>$1\<\/font\>/gs;
1126: }
1127: }
1128: if ($ENV{'form.link'}) {
1129: foreach (split(/\,/,$ENV{'form.link'})) {
1130: my ($anchorname,$linkurl)=split(/\>/,$_);
1131: my $matchthis=$anchorname;
1132: $matchthis=~s/\_+/\\s\+/g;
1133: $result=~s/(\Q$matchthis\E)/\<a href=\"$linkurl\"\>$1\<\/a\>/gs;
1134: }
1135: }
1136: if ($ENV{'form.anchor'}) {
1137: my $anchorname=$ENV{'form.anchor'};
1138: my $matchthis=$anchorname;
1139: $matchthis=~s/\_+/\\s\+/g;
1140: $result=~s/(\Q$matchthis\E)/\<a name=\"$anchorname\"\>$1\<\/a\>/s;
1141: $result.=(<<"ENDSCRIPT");
1142: <script type="text/javascript">
1143: document.location.hash='$anchorname';
1144: </script>
1145: ENDSCRIPT
1146: }
1147: return $result;
1148: }
1149:
1150: sub storefile {
1151: my ($file,$contents)=@_;
1152: &Apache::lonnet::correct_line_ends(\$contents);
1153: if (my $fh=Apache::File->new('>'.$file)) {
1154: print $fh $contents;
1155: $fh->close();
1156: return 1;
1157: } else {
1158: &warning("Unable to save file $file");
1159: return 0;
1160: }
1161: }
1162:
1163: sub createnewhtml {
1164: my $title=&mt('Title of document goes here');
1165: my $body=&mt('Body of document goes here');
1166: my $filecontents=(<<SIMPLECONTENT);
1167: <!DOCTYPE html PUBLIC "-//W3C//DTD XHTML 1.1//EN" "http://www.w3.org/TR/xhtml/11/DTD/xhtml11.dtd">
1168: <html>
1169: <head>
1170: <title>$title</title>
1171: </head>
1172: <body bgcolor="#FFFFFF">
1173: $body
1174: </body>
1175: </html>
1176: SIMPLECONTENT
1177: return $filecontents;
1178: }
1179:
1180: sub createnewsty {
1181: my $filecontents=(<<SIMPLECONTENT);
1182: <definetag name="">
1183: <render>
1184: <web></web>
1185: <tex></tex>
1186: </render>
1187: </definetag>
1188: SIMPLECONTENT
1189: return $filecontents;
1190: }
1191:
1192:
1193: sub inserteditinfo {
1194: my ($result,$filecontents,$filetype)=@_;
1195: $filecontents = &HTML::Entities::encode($filecontents,'<>&"');
1196: # my $editheader='<a href="#editsection">Edit below</a><hr />';
1197: my $xml_help = '';
1198: my $initialize='';
1199: if ($filetype eq 'html') {
1200: my $addbuttons=&Apache::lonhtmlcommon::htmlareaaddbuttons();
1201: $initialize=&Apache::lonhtmlcommon::htmlareaheaders().
1202: &Apache::lonhtmlcommon::spellheader();
1203: if (!&Apache::lonhtmlcommon::htmlareablocked() &&
1204: &Apache::lonhtmlcommon::htmlareabrowser()) {
1205: $initialize.=(<<FULLPAGE);
1206: <script type="text/javascript">
1207: $addbuttons
1208:
1209: HTMLArea.loadPlugin("FullPage");
1210:
1211: function initDocument() {
1212: var editor=new HTMLArea("filecont",config);
1213: editor.registerPlugin(FullPage);
1214: editor.generate();
1215: }
1216: </script>
1217: FULLPAGE
1218: } else {
1219: $initialize.=(<<FULLPAGE);
1220: <script type="text/javascript">
1221: $addbuttons
1222: function initDocument() {
1223: }
1224: </script>
1225: FULLPAGE
1226: }
1227: $result=~s/\<body([^\>]*)\>/\<body onload="initDocument()" $1\>/i;
1228: $xml_help=&Apache::loncommon::helpLatexCheatsheet();
1229: }
1230: my $cleanbut = '';
1231: if ($filetype eq 'html') {
1232: $cleanbut='<input type="submit" name="attemptclean" value="'.
1233: &mt('Save and then attempt to clean HTML').'" />';
1234: }
1235: my $titledisplay=&display_title();
1236: my %lt=&Apache::lonlocal::texthash('st' => 'Save this',
1237: 'vi' => 'View',
1238: 'ed' => 'Edit');
1239: my $buttons=(<<BUTTONS);
1240: $cleanbut
1241: <input type="submit" name="savethisfile" accesskey="s" value="$lt{'st'}" />
1242: <input type="submit" name="viewmode" accesskey="v" value="$lt{'vi'}" />
1243: BUTTONS
1244: $buttons.=&Apache::lonhtmlcommon::spelllink('xmledit','filecont');
1245: $buttons.=&Apache::lonhtmlcommon::htmlareaselectactive('filecont');
1246: my $editfooter=(<<ENDFOOTER);
1247: $initialize
1248: <hr />
1249: <a name="editsection" />
1250: <form method="post" name="xmledit">
1251: $xml_help
1252: <input type="hidden" name="editmode" value="$lt{'ed'}" />
1253: $buttons<br />
1254: <textarea style="width:100%" cols="80" rows="44" name="filecont" id="filecont">$filecontents</textarea>
1255: <br />$buttons
1256: <br />
1257: </form>
1258: $titledisplay
1259: </body>
1260: ENDFOOTER
1261: # $result=~s/(\<body[^\>]*\>)/$1$editheader/is;
1262: $result=~s/(\<\/body\>)/$editfooter/is;
1263: return $result;
1264: }
1265:
1266: sub get_target {
1267: my $viewgrades=&Apache::lonnet::allowed('vgr',$ENV{'request.course.id'});
1268: if ( $ENV{'request.state'} eq 'published') {
1269: if ( defined($ENV{'form.grade_target'})
1270: && ($viewgrades == 'F' )) {
1271: return ($ENV{'form.grade_target'});
1272: } elsif (defined($ENV{'form.grade_target'})) {
1273: if (($ENV{'form.grade_target'} eq 'web') ||
1274: ($ENV{'form.grade_target'} eq 'tex') ) {
1275: return $ENV{'form.grade_target'}
1276: } else {
1277: return 'web';
1278: }
1279: } else {
1280: return 'web';
1281: }
1282: } elsif ($ENV{'request.state'} eq 'construct') {
1283: if ( defined($ENV{'form.grade_target'})) {
1284: return ($ENV{'form.grade_target'});
1285: } else {
1286: return 'web';
1287: }
1288: } else {
1289: return 'web';
1290: }
1291: }
1292:
1293: sub handler {
1294: my $request=shift;
1295:
1296: my $target=&get_target();
1297:
1298: $Apache::lonxml::debug=$ENV{'user.debug'};
1299:
1300: &Apache::loncommon::content_type($request,'text/html');
1301: &Apache::loncommon::no_cache($request);
1302: if ($ENV{'request.state'} eq 'published') {
1303: $request->set_last_modified(&Apache::lonnet::metadata($request->uri,
1304: 'lastrevisiondate'));
1305: }
1306: $request->send_http_header;
1307:
1308: return OK if $request->header_only;
1309:
1310:
1311: my $file=&Apache::lonnet::filelocation("",$request->uri);
1312: my $filetype;
1313: if ($file =~ /\.sty$/) {
1314: $filetype='sty';
1315: } else {
1316: $filetype='html';
1317: }
1318: #
1319: # Edit action? Save file.
1320: #
1321: unless ($ENV{'request.state'} eq 'published') {
1322: if (($ENV{'form.savethisfile'}) || ($ENV{'form.attemptclean'})) {
1323: if (&storefile($file,$ENV{'form.filecont'})) {
1324: &Apache::lonxml::info("<font COLOR=\"#0000FF\">".
1325: &mt('Updated').": ".
1326: &Apache::lonlocal::locallocaltime(time).
1327: " </font>");
1328: }
1329: }
1330: }
1331: my %mystyle;
1332: my $result = '';
1333: my $filecontents=&Apache::lonnet::getfile($file);
1334: if ($filecontents eq -1) {
1335: my $bodytag=&Apache::loncommon::bodytag('File Error');
1336: my $fnf=&mt('File not found');
1337: $result=(<<ENDNOTFOUND);
1338: <html>
1339: <head>
1340: <title>$fnf</title>
1341: </head>
1342: $bodytag
1343: <b>$fnf: $file</b>
1344: </body>
1345: </html>
1346: ENDNOTFOUND
1347: $filecontents='';
1348: if ($ENV{'request.state'} ne 'published') {
1349: if ($filetype eq 'sty') {
1350: $filecontents=&createnewsty();
1351: } else {
1352: $filecontents=&createnewhtml();
1353: }
1354: $ENV{'form.editmode'}='Edit'; #force edit mode
1355: }
1356: } else {
1357: unless ($ENV{'request.state'} eq 'published') {
1358: if ($filecontents=~/BEGIN LON-CAPA Internal/) {
1359: &Apache::lonxml::error(&mt('This file appears to be a rendering of a Lon-CAPA resource. If this is correct, this resource will act very oddly and incorrectly.'));
1360: }
1361:
1362: if ($ENV{'form.attemptclean'}) {
1363: $filecontents=&htmlclean($filecontents,1);
1364: }
1365: #
1366: # we are in construction space, see if edit mode forced
1367: &Apache::loncommon::get_unprocessed_cgi
1368: ($ENV{'QUERY_STRING'},['editmode']);
1369: }
1370: if (!$ENV{'form.editmode'} || $ENV{'form.viewmode'}) {
1371: $result = &Apache::lonxml::xmlparse($request,$target,$filecontents,
1372: '',%mystyle);
1373: }
1374: }
1375:
1376: #
1377: # Edit action? Insert editing commands
1378: #
1379: unless ($ENV{'request.state'} eq 'published') {
1380: if ($ENV{'form.editmode'} && (!($ENV{'form.viewmode'}))) {
1381: my $displayfile=$request->uri;
1382: $displayfile=~s/^\/[^\/]*//;
1383: my $bodytag='<body bgcolor="#FFFFFF">';
1384: if ($ENV{'environment.remote'} eq 'off') {
1385: $bodytag=&Apache::loncommon::bodytag();
1386: }
1387: $result='<html>'.$bodytag.
1388: &Apache::lonxml::message_location().'<h3>'.
1389: $displayfile.
1390: '</h3></body></html>';
1391: $result=&inserteditinfo($result,$filecontents,$filetype);
1392: }
1393: }
1394: if ($filetype eq 'html') { writeallows($request->uri); }
1395:
1396:
1397: &Apache::lonxml::add_messages(\$result);
1398: $request->print($result);
1399:
1400: return OK;
1401: }
1402:
1403: sub display_title {
1404: my $result;
1405: if ($ENV{'request.state'} eq 'construct') {
1406: my $title=&Apache::lonnet::gettitle();
1407: if (!defined($title) || $title eq '') {
1408: $title = $ENV{'request.filename'};
1409: $title = substr($title, rindex($title, '/') + 1);
1410: }
1411: $result = "<script type='text/javascript'>top.document.title = '$title - LON-CAPA Construction Space';</script>";
1412: }
1413: return $result;
1414: }
1415:
1416: sub debug {
1417: if ($Apache::lonxml::debug eq "1") {
1418: $|=1;
1419: my $request=$Apache::lonxml::request;
1420: if (!$request) { $request=Apache->request; }
1421: $request->print('<font size="-2"><pre>DEBUG:'.&HTML::Entities::encode($_[0],'<>&"')."</pre></font>\n");
1422: #&Apache::lonnet::logthis($_[0]);
1423: }
1424: }
1425:
1426: sub show_error_warn_msg {
1427: if ($ENV{'request.filename'} eq '/home/httpd/html/res/lib/templates/simpleproblem.problem' &&
1428: &Apache::lonnet::allowed('mdc',$ENV{'request.course.id'})) {
1429: return 1;
1430: }
1431: return (($Apache::lonxml::debug eq 1) ||
1432: ($ENV{'request.state'} eq 'construct') ||
1433: ($Apache::lonhomework::browse eq 'F'
1434: &&
1435: $ENV{'form.show_errors'} eq 'on'));
1436: }
1437:
1438: sub error {
1439: $errorcount++;
1440: if ( &show_error_warn_msg() ) {
1441: # If printing in construction space, put the error inside <pre></pre>
1442: push(@Apache::lonxml::error_messages,
1443: $Apache::lonxml::warnings_error_header.
1444: "<b>ERROR:</b>".join("<br />\n",@_)."<br />\n");
1445: $Apache::lonxml::warnings_error_header='';
1446: } else {
1447: my $errormsg;
1448: my ($symb)=&Apache::lonnet::symbread();
1449: if ( !$symb ) {
1450: #public or browsers
1451: $errormsg=&mt("An error occured while processing this resource. The author has been notified.");
1452: }
1453: #notify author
1454: &Apache::lonmsg::author_res_msg($ENV{'request.filename'},join('<br />',@_));
1455: #notify course
1456: if ( $symb && $ENV{'request.course.id'} ) {
1457: my (undef,%users)=&Apache::lonfeedback::decide_receiver(undef,0,1,1,1);
1458: my $declutter=&Apache::lonnet::declutter($ENV{'request.filename'});
1459: my @userlist;
1460: foreach (keys %users) {
1461: my ($user,$domain) = split(/:/, $_);
1462: push(@userlist,"$user\@$domain");
1463: &Apache::lonmsg::user_normal_msg($user,$domain,
1464: "Error [$declutter]",join('<br />',@_));
1465: }
1466: if ($ENV{'request.role.adv'}) {
1467: $errormsg=&mt("An error occured while processing this resource. The course personnel ([_1]) and the author have been notified.",join(', ',@userlist));
1468: } else {
1469: $errormsg=&mt("An error occured while processing this resource. The instructor has been notified.");
1470: }
1471: }
1472: push(@Apache::lonxml::error_messages,"<b>$errormsg</b> <br />");
1473: }
1474: }
1475:
1476: sub warning {
1477: $warningcount++;
1478:
1479: if ($ENV{'form.grade_target'} ne 'tex') {
1480: if ( &show_error_warn_msg() ) {
1481: my $request=$Apache::lonxml::request;
1482: if (!$request) { $request=Apache->request; }
1483: push(@Apache::lonxml::warning_messages,
1484: $Apache::lonxml::warnings_error_header.
1485: "<b>W</b>ARNING<b>:</b>".join('<br />',@_)."<br />\n");
1486: $Apache::lonxml::warnings_error_header='';
1487: }
1488: }
1489: }
1490:
1491: sub info {
1492: if ($ENV{'form.grade_target'} ne 'tex'
1493: && $ENV{'request.state'} eq 'construct') {
1494: push(@Apache::lonxml::info_messages,join('<br />',@_)."<br />\n");
1495: }
1496: }
1497:
1498: sub message_location {
1499: return '__LONCAPA_INTERNAL_MESSAGE_LOCATION__';
1500: }
1501:
1502: sub add_messages {
1503: my ($msg)=@_;
1504: my $result=join(' ',
1505: @Apache::lonxml::info_messages,
1506: @Apache::lonxml::error_messages,
1507: @Apache::lonxml::warning_messages);
1508: undef(@Apache::lonxml::info_messages);
1509: undef(@Apache::lonxml::error_messages);
1510: undef(@Apache::lonxml::warning_messages);
1511: $$msg=~s/__LONCAPA_INTERNAL_MESSAGE_LOCATION__/$result/;
1512: $$msg=~s/__LONCAPA_INTERNAL_MESSAGE_LOCATION__//g;
1513: }
1514:
1515: sub get_param {
1516: my ($param,$parstack,$safeeval,$context,$case_insensitive) = @_;
1517: if ( ! $context ) { $context = -1; }
1518: my $args ='';
1519: if ( $#$parstack > (-2-$context) ) { $args=$$parstack[$context]; }
1520: if ( ! $Apache::lonxml::usestyle ) {
1521: $args=$Apache::lonxml::style_values.$args;
1522: }
1523: if ( ! $args ) { return undef; }
1524: if ( $case_insensitive ) {
1525: if ($args =~ s/(my \$)(\Q$param\E)(=\")/$1.lc($2).$3/ei) {
1526: return &Apache::run::run("{$args;".'return $'.$param.'}',
1527: $safeeval); #'
1528: } else {
1529: return undef;
1530: }
1531: } else {
1532: if ( $args =~ /my \$\Q$param\E=\"/ ) {
1533: return &Apache::run::run("{$args;".'return $'.$param.'}',
1534: $safeeval); #'
1535: } else {
1536: return undef;
1537: }
1538: }
1539: }
1540:
1541: sub get_param_var {
1542: my ($param,$parstack,$safeeval,$context,$case_insensitive) = @_;
1543: if ( ! $context ) { $context = -1; }
1544: my $args ='';
1545: if ( $#$parstack > (-2-$context) ) { $args=$$parstack[$context]; }
1546: if ( ! $Apache::lonxml::usestyle ) {
1547: $args=$Apache::lonxml::style_values.$args;
1548: }
1549: &Apache::lonxml::debug("Args are $args param is $param");
1550: if ($case_insensitive) {
1551: if (! ($args=~s/(my \$)(\Q$param\E)(=\")/$1.lc($2).$3/ei)) {
1552: return undef;
1553: }
1554: } elsif ( $args !~ /my \$\Q$param\E=\"/ ) { return undef; }
1555: my $value=&Apache::run::run("{$args;".'return $'.$param.'}',$safeeval); #'
1556: &Apache::lonxml::debug("first run is $value");
1557: if ($value =~ /^[\$\@\%][a-zA-Z_]\w*$/) {
1558: &Apache::lonxml::debug("doing second");
1559: my @result=&Apache::run::run("return $value",$safeeval,1);
1560: if (!defined($result[0])) {
1561: return $value
1562: } else {
1563: if (wantarray) { return @result; } else { return $result[0]; }
1564: }
1565: } else {
1566: return $value;
1567: }
1568: }
1569:
1570: sub register_insert {
1571: my @data = split /\n/, &Apache::lonnet::getfile('/home/httpd/lonTabs/insertlist.tab');
1572: my $i;
1573: my $tagnum=0;
1574: my @order;
1575: for ($i=0;$i < $#data; $i++) {
1576: my $line = $data[$i];
1577: if ( $line =~ /^\#/ || $line =~ /^\s*\n/) { next; }
1578: if ( $line =~ /TABLE/ ) { last; }
1579: my ($tag,$descrip,$color,$function,$show,$helpfile,$helpdesc) = split(/,/, $line);
1580: if ($tag) {
1581: $insertlist{"$tagnum.tag"} = $tag;
1582: $insertlist{"$tagnum.description"} = $descrip;
1583: $insertlist{"$tagnum.color"} = $color;
1584: $insertlist{"$tagnum.function"} = $function;
1585: if (!defined($show)) { $show='yes'; }
1586: $insertlist{"$tagnum.show"}= $show;
1587: $insertlist{"$tagnum.helpfile"} = $helpfile;
1588: $insertlist{"$tagnum.helpdesc"} = $helpdesc;
1589: $insertlist{"$tag.num"}=$tagnum;
1590: $tagnum++;
1591: }
1592: }
1593: $i++; #skipping TABLE line
1594: $tagnum = 0;
1595: for (;$i < $#data;$i++) {
1596: my $line = $data[$i];
1597: my ($mnemonic,@which) = split(/ +/,$line);
1598: my $tag = $insertlist{"$tagnum.tag"};
1599: for (my $j=0;$j <=$#which;$j++) {
1600: if ( $which[$j] eq 'Y' ) {
1601: if ($insertlist{"$j.show"} ne 'no') {
1602: push(@{ $insertlist{"$tag.which"} },$j);
1603: }
1604: }
1605: }
1606: $tagnum++;
1607: }
1608: }
1609:
1610: sub description {
1611: my ($token)=@_;
1612: my $tagnum;
1613: my $tag=$token->[1];
1614: foreach my $namespace (reverse @Apache::lonxml::namespace) {
1615: my $testtag=$namespace.'::'.$tag;
1616: $tagnum=$insertlist{"$testtag.num"};
1617: if (defined($tagnum)) { last; }
1618: }
1619: if (!defined ($tagnum)) { $tagnum=$Apache::lonxml::insertlist{"$tag.num"}; }
1620: return $insertlist{$tagnum.'.description'};
1621: }
1622:
1623: # Returns a list containing the help file, and the description
1624: sub helpinfo {
1625: my ($token)=@_;
1626: my $tagnum;
1627: my $tag=$token->[1];
1628: foreach my $namespace (reverse @Apache::lonxml::namespace) {
1629: my $testtag=$namespace.'::'.$tag;
1630: $tagnum=$insertlist{"$testtag.num"};
1631: if (defined($tagnum)) { last; }
1632: }
1633: if (!defined ($tagnum)) { $tagnum=$Apache::lonxml::insertlist{"$tag.num"}; }
1634: return ($insertlist{$tagnum.'.helpfile'}, $insertlist{$tagnum.'.helpdesc'});
1635: }
1636:
1637: # ----------------------------------------------------------------- whichuser
1638: # returns a list of $symb, $courseid, $domain, $name that is correct for
1639: # calls to lonnet functions for this setup.
1640: # - looks for form.grade_ parameters
1641: sub whichuser {
1642: my ($passedsymb)=@_;
1643: my ($symb,$courseid,$domain,$name,$publicuser);
1644: if (defined($ENV{'form.grade_symb'})) {
1645: my ($tmp_courseid)=
1646: &Apache::loncommon::get_env_multiple('form.grade_courseid');
1647: my $allowed=&Apache::lonnet::allowed('vgr',$tmp_courseid);
1648: if (!$allowed &&
1649: exists($ENV{'request.course.sec'}) &&
1650: $ENV{'request.course.sec'} !~ /^\s*$/) {
1651: $allowed=&Apache::lonnet::allowed('vgr',$tmp_courseid.
1652: '/'.$ENV{'request.course.sec'});
1653: }
1654: if ($allowed) {
1655: ($symb)=&Apache::loncommon::get_env_multiple('form.grade_symb');
1656: $courseid=$tmp_courseid;
1657: ($domain)=&Apache::loncommon::get_env_multiple('form.grade_domain');
1658: ($name)=&Apache::loncommon::get_env_multiple('form.grade_username');
1659: return ($symb,$courseid,$domain,$name,$publicuser);
1660: }
1661: }
1662: if (!$passedsymb) {
1663: $symb=&Apache::lonnet::symbread();
1664: } else {
1665: $symb=$passedsymb;
1666: }
1667: $courseid=$ENV{'request.course.id'};
1668: $domain=$ENV{'user.domain'};
1669: $name=$ENV{'user.name'};
1670: if ($name eq 'public' && $domain eq 'public') {
1671: if (!defined($ENV{'form.username'})) {
1672: $ENV{'form.username'}.=time.rand(10000000);
1673: }
1674: $name.=$ENV{'form.username'};
1675: }
1676: return ($symb,$courseid,$domain,$name,$publicuser);
1677: }
1678:
1679: 1;
1680: __END__
1681:
1682:
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