1: # The LearningOnline Network with CAPA
2: # XML Parser Module
3: #
4: # $Id: lonxml.pm,v 1.372 2005/04/07 06:56:27 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: $Apache::lonhomework::parsing_a_task ) {
179: $mode='problem';
180: $status=$Apache::inputtags::status[-1];
181: }
182: my $discussion;
183: &Apache::loncommon::get_unprocessed_cgi
184: ($env{'query_string'},['LONCAPA_INTERNAL_no_discussion']);
185: if (! exists($env{'form.LONCAPA_INTERNAL_no_discussion'}) ||
186: $env{'form.LONCAPA_INTERNAL_no_discussion'} ne 'true') {
187: $discussion=&Apache::lonfeedback::list_discussion($mode,$status);
188: }
189: if ($target eq 'tex') {
190: $discussion.='<tex>\keephidden{ENDOFPROBLEM}\vskip 0.5mm\noindent\makebox[\textwidth/$number_of_columns][b]{\hrulefill}\end{document}</tex>';
191: &Apache::lonxml::newparser($parser,\$discussion,'');
192: return '';
193: } else {
194: return $discussion.&Apache::loncommon::endbodytag();
195: }
196: }
197:
198: sub tokeninputfield {
199: my $defhost=$Apache::lonnet::perlvar{'lonHostID'};
200: $defhost=~tr/a-z/A-Z/;
201: return (<<ENDINPUTFIELD)
202: <script type="text/javascript">
203: function updatetoken() {
204: var comp=new Array;
205: var barcode=unescape(document.tokeninput.barcode.value);
206: comp=barcode.split('*');
207: if (typeof(comp[0])!="undefined") {
208: document.tokeninput.codeone.value=comp[0];
209: }
210: if (typeof(comp[1])!="undefined") {
211: document.tokeninput.codetwo.value=comp[1];
212: }
213: if (typeof(comp[2])!="undefined") {
214: comp[2]=comp[2].toUpperCase();
215: document.tokeninput.codethree.value=comp[2];
216: }
217: document.tokeninput.barcode.value='';
218: }
219: </script>
220: <form method="post" name="tokeninput">
221: <table border="2" bgcolor="#FFFFBB">
222: <tr><th>DocID Checkin</th></tr>
223: <tr><td>
224: <table>
225: <tr>
226: <td>Scan in Barcode</td>
227: <td><input type="text" size="22" name="barcode"
228: onChange="updatetoken()"/></td>
229: </tr>
230: <tr><td><i>or</i> Type in DocID</td>
231: <td>
232: <input type="text" size="5" name="codeone" />
233: <b><font size="+2">*</font></b>
234: <input type="text" size="5" name="codetwo" />
235: <b><font size="+2">*</font></b>
236: <input type="text" size="10" name="codethree" value="$defhost"
237: onChange="this.value=this.value.toUpperCase()" />
238: </td></tr>
239: </table>
240: </td></tr>
241: <tr><td><input type="submit" value="Check in DocID" /></td></tr>
242: </table>
243: </form>
244: ENDINPUTFIELD
245: }
246:
247: sub maketoken {
248: my ($symb,$tuname,$tudom,$tcrsid)=@_;
249: unless ($symb) {
250: $symb=&Apache::lonnet::symbread();
251: }
252: unless ($tuname) {
253: $tuname=$env{'user.name'};
254: $tudom=$env{'user.domain'};
255: $tcrsid=$env{'request.course.id'};
256: }
257:
258: return &Apache::lonnet::checkout($symb,$tuname,$tudom,$tcrsid);
259: }
260:
261: sub printtokenheader {
262: my ($target,$token,$tsymb,$tcrsid,$tudom,$tuname)=@_;
263: unless ($token) { return ''; }
264:
265: my ($symb,$courseid,$domain,$name) = &Apache::lonxml::whichuser();
266: unless ($tsymb) {
267: $tsymb=$symb;
268: }
269: unless ($tuname) {
270: $tuname=$name;
271: $tudom=$domain;
272: $tcrsid=$courseid;
273: }
274:
275: my %reply=&Apache::lonnet::get('environment',
276: ['firstname','middlename','lastname','generation'],
277: $tudom,$tuname);
278: my $plainname=$reply{'firstname'}.' '.
279: $reply{'middlename'}.' '.
280: $reply{'lastname'}.' '.
281: $reply{'generation'};
282:
283: if ($target eq 'web') {
284: my %idhash=&Apache::lonnet::idrget($tudom,($tuname));
285: return
286: '<img align="right" src="/cgi-bin/barcode.png?encode='.$token.'" />'.
287: &mt('Checked out for').' '.$plainname.
288: '<br />'.&mt('User').': '.$tuname.' at '.$tudom.
289: '<br />'.&mt('ID').': '.$idhash{$tuname}.
290: '<br />'.&mt('CourseID').': '.$tcrsid.
291: '<br />'.&mt('Course').': '.$env{'course.'.$tcrsid.'.description'}.
292: '<br />'.&mt('DocID').': '.$token.
293: '<br />'.&mt('Time').': '.&Apache::lonlocal::locallocaltime().'<hr />';
294: } else {
295: return $token;
296: }
297: }
298:
299: sub fontsettings {
300: my $headerstring='';
301: if (($env{'browser.os'} eq 'mac') && (!$env{'browser.mathml'})) {
302: $headerstring.=
303: '<meta Content-Type="text/html; charset=x-mac-roman" />';
304: } elsif (!$env{'browser.mathml'} && $env{'browser.unicode'}) {
305: $headerstring.=
306: '<meta http-equiv="Content-Type" content="text/html; charset=utf-8" />';
307: }
308: return $headerstring;
309: }
310:
311: sub printalltags {
312: my $temp;
313: foreach $temp (sort keys %Apache::lonxml::alltags) {
314: &Apache::lonxml::debug("$temp -- ".
315: join(',',@{ $Apache::lonxml::alltags{$temp} }));
316: }
317: }
318:
319: sub xmlparse {
320: my ($request,$target,$content_file_string,$safeinit,%style_for_target) = @_;
321:
322: &setup_globals($request,$target);
323: &Apache::inputtags::initialize_inputtags();
324: &Apache::bridgetask::initialize_bridgetask();
325: &Apache::outputtags::initialize_outputtags();
326: &Apache::edit::initialize_edit();
327: &Apache::londefdef::initialize_londefdef();
328:
329: #
330: # do we have a course style file?
331: #
332:
333: if ($env{'request.course.id'} && $env{'request.state'} ne 'construct') {
334: my $bodytext=
335: $env{'course.'.$env{'request.course.id'}.'.default_xml_style'};
336: if ($bodytext) {
337: foreach my $file (split(',',$bodytext)) {
338: my $location=&Apache::lonnet::filelocation('',$file);
339: my $styletext=&Apache::lonnet::getfile($location);
340: if ($styletext ne '-1') {
341: %style_for_target = (%style_for_target,
342: &Apache::style::styleparser($target,$styletext));
343: }
344: }
345: }
346: } elsif ($env{'construct.style'} && ($env{'request.state'} eq 'construct')) {
347: my $location=&Apache::lonnet::filelocation('',$env{'construct.style'});
348: my $styletext=&Apache::lonnet::getfile($location);
349: if ($styletext ne '-1') {
350: %style_for_target = (%style_for_target,
351: &Apache::style::styleparser($target,$styletext));
352: }
353: }
354: #&printalltags();
355: my @pars = ();
356: my $pwd=$env{'request.filename'};
357: $pwd =~ s:/[^/]*$::;
358: &newparser(\@pars,\$content_file_string,$pwd);
359:
360: my $safeeval = new Safe;
361: my $safehole = new Safe::Hole;
362: &init_safespace($target,$safeeval,$safehole,$safeinit);
363: #-------------------- Redefinition of the target in the case of compound target
364:
365: ($target, my @tenta) = split('&&',$target);
366:
367: my @stack = ();
368: my @parstack = ();
369: &initdepth();
370: &init_alarm();
371: my $finaloutput = &inner_xmlparse($target,\@stack,\@parstack,\@pars,
372: $safeeval,\%style_for_target);
373:
374: if ($env{'request.uri'}) {
375: &writeallows($env{'request.uri'});
376: }
377: &do_registered_ssi();
378: if ($Apache::lonxml::counter_changed) { &store_counter() }
379: if ($env{'form.return_only_error_and_warning_counts'}) {
380: return "$errorcount:$warningcount";
381: }
382: return $finaloutput;
383: }
384:
385: sub htmlclean {
386: my ($raw,$full)=@_;
387: # Take care of CRLF etc
388:
389: $raw=~s/\r\f/\n/gs; $raw=~s/\f\r/\n/gs;
390: $raw=~s/\r\n/\n/gs; $raw=~s/\n\r/\n/gs;
391: $raw=~s/\f/\n/gs; $raw=~s/\r/\n/gs;
392: $raw=~s/\&\#10\;/\n/gs; $raw=~s/\&\#13\;/\n/gs;
393:
394: # Generate empty tags, remove wrong end tags
395: $raw=~s/\<(br|hr|img|meta|allow|basefont)([^\>\/]*?)\>/\<$1$2 \/\>/gis;
396: $raw=~s/\<\/(br|hr|img|meta|allow|basefont)\>//gis;
397: unless ($full) {
398: $raw=~s/\<[\/]*(body|head|html)\>//gis;
399: }
400: # Make standard tags lowercase
401: foreach ('html','body','head','meta','h1','h2','h3','h4','b','i','m',
402: 'table','tr','td','th','p','br','hr','img','embed','font',
403: 'a','strong','center','title','basefont','li','ol','ul',
404: 'input','select','form','option','script','pre') {
405: $raw=~s/\<$_\s*\>/\<$_\>/gis;
406: $raw=~s/\<\/$_\s*\>/<\/$_\>/gis;
407: $raw=~s/\<$_\s([^\>]*)\>/<$_ $1\>/gis;
408: }
409: return $raw;
410: }
411:
412: sub latex_special_symbols {
413: my ($string,$where)=@_;
414: if ($where eq 'header') {
415: $string =~ s/(\\|_|\^)/ /g;
416: $string =~ s/(\$|%|\{|\})/\\$1/g;
417: $string =~ s/_/ /g;
418: $string=&Apache::lonprintout::character_chart($string);
419: # any & or # leftover should be safe to just escape
420: $string=~s/([^\\])\&/$1\\\&/g;
421: $string=~s/([^\\])\#/$1\\\#/g;
422: } else {
423: $string=~s/\\/\\ensuremath{\\backslash}/g;
424: $string=~s/\\\%|\%/\\\%/g;
425: $string=~s/\\{|{/\\{/g;
426: $string=~s/\\}|}/\\}/g;
427: $string=~s/\\\$|\$/\\\$/g;
428: $string=~s/\\\_|\_/\\\_/g;
429: $string=~s/([^\\]|^)(\~|\^)/$1\\$2\\strut /g;
430: $string=~s/(>|<)/\\ensuremath\{$1\}/g; #more or less
431: $string=&Apache::lonprintout::character_chart($string);
432: # any & or # leftover should be safe to just escape
433: $string=~s/\\\&|\&/\\\&/g;
434: $string=~s/\\\#|\#/\\\#/g;
435: $string=~s/\|/\$\\mid\$/g;
436: #single { or } How to escape?
437: }
438: return $string;
439: }
440:
441: sub inner_xmlparse {
442: my ($target,$stack,$parstack,$pars,$safeeval,$style_for_target)=@_;
443: my $finaloutput = '';
444: my $result;
445: my $token;
446: my $dontpop=0;
447: while ( $#$pars > -1 ) {
448: while ($token = $$pars['-1']->get_token) {
449: if (($token->[0] eq 'T') || ($token->[0] eq 'C') ) {
450: if ($metamode<1) {
451: my $text=$token->[1];
452: if ($token->[0] eq 'C' && $target eq 'tex') {
453: $text = '';
454: # $text = '%'.$text."\n";
455: }
456: $result.=$text;
457: }
458: } elsif (($token->[0] eq 'D')) {
459: if ($metamode<1 && $target eq 'web') {
460: my $text=$token->[1];
461: $result.=$text;
462: }
463: } elsif ($token->[0] eq 'PI') {
464: if ($metamode<1 && $target eq 'web') {
465: $result=$token->[2];
466: }
467: } elsif ($token->[0] eq 'S') {
468: # add tag to stack
469: push (@$stack,$token->[1]);
470: # add parameters list to another stack
471: push (@$parstack,&parstring($token));
472: &increasedepth($token);
473: if ($Apache::lonxml::usestyle &&
474: exists($$style_for_target{$token->[1]})) {
475: $Apache::lonxml::usestyle=0;
476: my $string=$$style_for_target{$token->[1]}.
477: '<LONCAPA_INTERNAL_TURN_STYLE_ON />';
478: &Apache::lonxml::newparser($pars,\$string);
479: $Apache::lonxml::style_values=$$parstack[-1];
480: $Apache::lonxml::style_end_values=$$parstack[-1];
481: } else {
482: $result = &callsub("start_$token->[1]", $target, $token, $stack,
483: $parstack, $pars, $safeeval, $style_for_target);
484: }
485: } elsif ($token->[0] eq 'E') {
486: if ($Apache::lonxml::usestyle &&
487: exists($$style_for_target{'/'."$token->[1]"})) {
488: $Apache::lonxml::usestyle=0;
489: my $string=$$style_for_target{'/'.$token->[1]}.
490: '<LONCAPA_INTERNAL_TURN_STYLE_ON end="'.$token->[1].'" />';
491: &Apache::lonxml::newparser($pars,\$string);
492: $Apache::lonxml::style_values=$Apache::lonxml::style_end_values;
493: $Apache::lonxml::style_end_values='';
494: $dontpop=1;
495: } else {
496: #clear out any tags that didn't end
497: while ($token->[1] ne $$stack['-1'] && ($#$stack > -1)) {
498: my $lasttag=$$stack[-1];
499: if ($token->[1] =~ /^\Q$lasttag\E$/i) {
500: &Apache::lonxml::warning('Using tag </'.$token->[1].'> on line '.$token->[3].' as end tag to <'.$$stack[-1].'>');
501: last;
502: } else {
503: &Apache::lonxml::warning('Found tag </'.$token->[1].'> on line '.$token->[3].' when looking for </'.$$stack[-1].'> in file');
504: &end_tag($stack,$parstack,$token);
505: }
506: }
507: $result = &callsub("end_$token->[1]", $target, $token, $stack,
508: $parstack, $pars,$safeeval, $style_for_target);
509: }
510: } else {
511: &Apache::lonxml::error("Unknown token event :$token->[0]:$token->[1]:");
512: }
513: #evaluate variable refs in result
514: if ($Apache::lonxml::post_evaluate &&$result ne "") {
515: my $extras;
516: if (!$Apache::lonxml::usestyle) {
517: $extras=$Apache::lonxml::style_values;
518: }
519: if ( $#$parstack > -1 ) {
520: $result=&Apache::run::evaluate($result,$safeeval,$extras.$$parstack[-1]);
521: } else {
522: $result= &Apache::run::evaluate($result,$safeeval,$extras);
523: }
524: }
525: $Apache::lonxml::post_evaluate=1;
526:
527: if (($token->[0] eq 'T') || ($token->[0] eq 'C') || ($token->[0] eq 'D') ) {
528: #Style file definitions should be correct
529: if ($target eq 'tex' && ($Apache::lonxml::usestyle)) {
530: $result=&latex_special_symbols($result);
531: }
532: }
533:
534: if ($Apache::lonxml::redirection) {
535: $Apache::lonxml::outputstack['-1'] .= $result;
536: } else {
537: $finaloutput.=$result;
538: }
539: $result = '';
540:
541: if ($token->[0] eq 'E' && !$dontpop) {
542: &end_tag($stack,$parstack,$token);
543: }
544: $dontpop=0;
545: }
546: if ($#$pars > -1) {
547: pop @$pars;
548: pop @Apache::lonxml::pwd;
549: }
550: }
551:
552: # if ($target eq 'meta') {
553: # $finaloutput.=&endredirection;
554: # }
555:
556:
557: if (($ENV{'QUERY_STRING'}) && ($target eq 'web')) {
558: $finaloutput=&afterburn($finaloutput);
559: }
560: return $finaloutput;
561: }
562:
563: ##
564: ## Looks to see if there is a subroutine defined for this tag. If so, call it,
565: ## otherwise do not call it as we do not know what it is.
566: ##
567: sub callsub {
568: my ($sub,$target,$token,$tagstack,$parstack,$parser,$safeeval,$style)=@_;
569: my $currentstring='';
570: my $nodefault;
571: {
572: my $sub1;
573: no strict 'refs';
574: my $tag=$token->[1];
575: # get utterly rid of extended html tags
576: if ($tag=~/^x\-/i) { return ''; }
577: my $space=$Apache::lonxml::alltags{$tag}[-1];
578: if (!$space) {
579: $tag=~tr/A-Z/a-z/;
580: $sub=~tr/A-Z/a-z/;
581: $space=$Apache::lonxml::alltags{$tag}[-1]
582: }
583:
584: my $deleted=0;
585: $Apache::lonxml::curdepth=join('_',@Apache::lonxml::depthcounter);
586: if (($token->[0] eq 'S') && ($target eq 'modified')) {
587: $deleted=&Apache::edit::handle_delete($space,$target,$token,$tagstack,
588: $parstack,$parser,$safeeval,
589: $style);
590: }
591: if (!$deleted) {
592: if ($space) {
593: #&Apache::lonxml::debug("Calling sub $sub in $space $metamode");
594: $sub1="$space\:\:$sub";
595: ($currentstring,$nodefault) = &$sub1($target,$token,$tagstack,
596: $parstack,$parser,$safeeval,
597: $style);
598: } else {
599: if ($target eq 'tex') {
600: # throw away tag name
601: return '';
602: }
603: #&Apache::lonxml::debug("NOT Calling sub $sub in $space $metamode");
604: if ($metamode <1) {
605: if (defined($token->[4]) && ($metamode < 1)) {
606: $currentstring = $token->[4];
607: } else {
608: $currentstring = $token->[2];
609: }
610: }
611: }
612: # &Apache::lonxml::debug("nodefalt:$nodefault:");
613: if ($currentstring eq '' && $nodefault eq '') {
614: if ($target eq 'edit') {
615: #&Apache::lonxml::debug("doing default edit for $token->[1]");
616: if ($token->[0] eq 'S') {
617: $currentstring = &Apache::edit::tag_start($target,$token);
618: } elsif ($token->[0] eq 'E') {
619: $currentstring = &Apache::edit::tag_end($target,$token);
620: }
621: } elsif ($target eq 'modified') {
622: if ($token->[0] eq 'S') {
623: $currentstring = $token->[4];
624: $currentstring.=&Apache::edit::handle_insert();
625: } elsif ($token->[0] eq 'E') {
626: $currentstring = $token->[2];
627: $currentstring.=&Apache::edit::handle_insertafter($token->[1]);
628: } else {
629: $currentstring = $token->[2];
630: }
631: }
632: }
633: }
634: use strict 'refs';
635: }
636: return $currentstring;
637: }
638:
639: sub setup_globals {
640: my ($request,$target)=@_;
641: $Apache::lonxml::request=$request;
642: $Apache::lonxml::registered = 0;
643: @Apache::lonxml::htmlareafields=();
644: $errorcount=0;
645: $warningcount=0;
646: $Apache::lonxml::default_homework_loaded=0;
647: $Apache::lonxml::usestyle=1;
648: &init_counter();
649: @Apache::lonxml::pwd=();
650: @Apache::lonxml::extlinks=();
651: @Apache::lonxml::ssi_info=();
652: $Apache::lonxml::post_evaluate=1;
653: $Apache::lonxml::warnings_error_header='';
654: if ($target eq 'meta') {
655: $Apache::lonxml::redirection = 0;
656: $Apache::lonxml::metamode = 1;
657: $Apache::lonxml::evaluate = 1;
658: $Apache::lonxml::import = 0;
659: } elsif ($target eq 'answer') {
660: $Apache::lonxml::redirection = 0;
661: $Apache::lonxml::metamode = 1;
662: $Apache::lonxml::evaluate = 1;
663: $Apache::lonxml::import = 1;
664: } elsif ($target eq 'grade') {
665: &startredirection;
666: $Apache::lonxml::metamode = 0;
667: $Apache::lonxml::evaluate = 1;
668: $Apache::lonxml::import = 1;
669: } elsif ($target eq 'modified') {
670: $Apache::lonxml::redirection = 0;
671: $Apache::lonxml::metamode = 0;
672: $Apache::lonxml::evaluate = 0;
673: $Apache::lonxml::import = 0;
674: } elsif ($target eq 'edit') {
675: $Apache::lonxml::redirection = 0;
676: $Apache::lonxml::metamode = 0;
677: $Apache::lonxml::evaluate = 0;
678: $Apache::lonxml::import = 0;
679: } elsif ($target eq 'analyze') {
680: $Apache::lonxml::redirection = 0;
681: $Apache::lonxml::metamode = 0;
682: $Apache::lonxml::evaluate = 1;
683: $Apache::lonxml::import = 1;
684: } else {
685: $Apache::lonxml::redirection = 0;
686: $Apache::lonxml::metamode = 0;
687: $Apache::lonxml::evaluate = 1;
688: $Apache::lonxml::import = 1;
689: }
690: }
691:
692: sub init_safespace {
693: my ($target,$safeeval,$safehole,$safeinit) = @_;
694: $safeeval->permit("entereval");
695: $safeeval->permit(":base_math");
696: $safeeval->permit("sort");
697: $safeeval->permit("time");
698: $safeeval->deny("rand");
699: $safeeval->deny("srand");
700: $safeeval->deny(":base_io");
701: $safehole->wrap(\&Apache::scripttag::xmlparse,$safeeval,'&xmlparse');
702: $safehole->wrap(\&Apache::outputtags::multipart,$safeeval,'&multipart');
703: $safehole->wrap(\&Apache::lonnet::EXT,$safeeval,'&EXT');
704: $safehole->wrap(\&Apache::chemresponse::chem_standard_order,$safeeval,
705: '&chem_standard_order');
706: $safehole->wrap(\&Apache::response::check_status,$safeeval,'&check_status');
707:
708: $safehole->wrap(\&Math::Cephes::asin,$safeeval,'&asin');
709: $safehole->wrap(\&Math::Cephes::acos,$safeeval,'&acos');
710: $safehole->wrap(\&Math::Cephes::atan,$safeeval,'&atan');
711: $safehole->wrap(\&Math::Cephes::sinh,$safeeval,'&sinh');
712: $safehole->wrap(\&Math::Cephes::cosh,$safeeval,'&cosh');
713: $safehole->wrap(\&Math::Cephes::tanh,$safeeval,'&tanh');
714: $safehole->wrap(\&Math::Cephes::asinh,$safeeval,'&asinh');
715: $safehole->wrap(\&Math::Cephes::acosh,$safeeval,'&acosh');
716: $safehole->wrap(\&Math::Cephes::atanh,$safeeval,'&atanh');
717: $safehole->wrap(\&Math::Cephes::erf,$safeeval,'&erf');
718: $safehole->wrap(\&Math::Cephes::erfc,$safeeval,'&erfc');
719: $safehole->wrap(\&Math::Cephes::j0,$safeeval,'&j0');
720: $safehole->wrap(\&Math::Cephes::j1,$safeeval,'&j1');
721: $safehole->wrap(\&Math::Cephes::jn,$safeeval,'&jn');
722: $safehole->wrap(\&Math::Cephes::jv,$safeeval,'&jv');
723: $safehole->wrap(\&Math::Cephes::y0,$safeeval,'&y0');
724: $safehole->wrap(\&Math::Cephes::y1,$safeeval,'&y1');
725: $safehole->wrap(\&Math::Cephes::yn,$safeeval,'&yn');
726: $safehole->wrap(\&Math::Cephes::yv,$safeeval,'&yv');
727:
728: $safehole->wrap(\&Math::Cephes::bdtr ,$safeeval,'&bdtr' );
729: $safehole->wrap(\&Math::Cephes::bdtrc ,$safeeval,'&bdtrc' );
730: $safehole->wrap(\&Math::Cephes::bdtri ,$safeeval,'&bdtri' );
731: $safehole->wrap(\&Math::Cephes::btdtr ,$safeeval,'&btdtr' );
732: $safehole->wrap(\&Math::Cephes::chdtr ,$safeeval,'&chdtr' );
733: $safehole->wrap(\&Math::Cephes::chdtrc,$safeeval,'&chdtrc');
734: $safehole->wrap(\&Math::Cephes::chdtri,$safeeval,'&chdtri');
735: $safehole->wrap(\&Math::Cephes::fdtr ,$safeeval,'&fdtr' );
736: $safehole->wrap(\&Math::Cephes::fdtrc ,$safeeval,'&fdtrc' );
737: $safehole->wrap(\&Math::Cephes::fdtri ,$safeeval,'&fdtri' );
738: $safehole->wrap(\&Math::Cephes::gdtr ,$safeeval,'&gdtr' );
739: $safehole->wrap(\&Math::Cephes::gdtrc ,$safeeval,'&gdtrc' );
740: $safehole->wrap(\&Math::Cephes::nbdtr ,$safeeval,'&nbdtr' );
741: $safehole->wrap(\&Math::Cephes::nbdtrc,$safeeval,'&nbdtrc');
742: $safehole->wrap(\&Math::Cephes::nbdtri,$safeeval,'&nbdtri');
743: $safehole->wrap(\&Math::Cephes::ndtr ,$safeeval,'&ndtr' );
744: $safehole->wrap(\&Math::Cephes::ndtri ,$safeeval,'&ndtri' );
745: $safehole->wrap(\&Math::Cephes::pdtr ,$safeeval,'&pdtr' );
746: $safehole->wrap(\&Math::Cephes::pdtrc ,$safeeval,'&pdtrc' );
747: $safehole->wrap(\&Math::Cephes::pdtri ,$safeeval,'&pdtri' );
748: $safehole->wrap(\&Math::Cephes::stdtr ,$safeeval,'&stdtr' );
749: $safehole->wrap(\&Math::Cephes::stdtri,$safeeval,'&stdtri');
750:
751: # $safehole->wrap(\&Math::Cephes::new_fract,$safeeval,'&new_fract');
752: # $safehole->wrap(\&Math::Cephes::radd,$safeeval,'&radd');
753: # $safehole->wrap(\&Math::Cephes::rsub,$safeeval,'&rsub');
754: # $safehole->wrap(\&Math::Cephes::rmul,$safeeval,'&rmul');
755: # $safehole->wrap(\&Math::Cephes::rdiv,$safeeval,'&rdiv');
756: # $safehole->wrap(\&Math::Cephes::euclid,$safeeval,'&euclid');
757:
758: $safehole->wrap(\&Math::Random::random_beta,$safeeval,'&math_random_beta');
759: $safehole->wrap(\&Math::Random::random_chi_square,$safeeval,'&math_random_chi_square');
760: $safehole->wrap(\&Math::Random::random_exponential,$safeeval,'&math_random_exponential');
761: $safehole->wrap(\&Math::Random::random_f,$safeeval,'&math_random_f');
762: $safehole->wrap(\&Math::Random::random_gamma,$safeeval,'&math_random_gamma');
763: $safehole->wrap(\&Math::Random::random_multivariate_normal,$safeeval,'&math_random_multivariate_normal');
764: $safehole->wrap(\&Math::Random::random_multinomial,$safeeval,'&math_random_multinomial');
765: $safehole->wrap(\&Math::Random::random_noncentral_chi_square,$safeeval,'&math_random_noncentral_chi_square');
766: $safehole->wrap(\&Math::Random::random_noncentral_f,$safeeval,'&math_random_noncentral_f');
767: $safehole->wrap(\&Math::Random::random_normal,$safeeval,'&math_random_normal');
768: $safehole->wrap(\&Math::Random::random_permutation,$safeeval,'&math_random_permutation');
769: $safehole->wrap(\&Math::Random::random_permuted_index,$safeeval,'&math_random_permuted_index');
770: $safehole->wrap(\&Math::Random::random_uniform,$safeeval,'&math_random_uniform');
771: $safehole->wrap(\&Math::Random::random_poisson,$safeeval,'&math_random_poisson');
772: $safehole->wrap(\&Math::Random::random_uniform_integer,$safeeval,'&math_random_uniform_integer');
773: $safehole->wrap(\&Math::Random::random_negative_binomial,$safeeval,'&math_random_negative_binomial');
774: $safehole->wrap(\&Math::Random::random_binomial,$safeeval,'&math_random_binomial');
775: $safehole->wrap(\&Math::Random::random_seed_from_phrase,$safeeval,'&random_seed_from_phrase');
776: $safehole->wrap(\&Math::Random::random_set_seed_from_phrase,$safeeval,'&random_set_seed_from_phrase');
777: $safehole->wrap(\&Math::Random::random_get_seed,$safeeval,'&random_get_seed');
778: $safehole->wrap(\&Math::Random::random_set_seed,$safeeval,'&random_set_seed');
779: $safehole->wrap(\&Apache::lonxml::error,$safeeval,'&LONCAPA_INTERNAL_ERROR');
780: $safehole->wrap(\&Apache::lonxml::debug,$safeeval,'&LONCAPA_INTERNAL_DEBUG');
781: $safehole->wrap(\&Apache::caparesponse::get_sigrange,$safeeval,'&LONCAPA_INTERNAL_get_sigrange');
782:
783: #need to inspect this class of ops
784: # $safeeval->deny(":base_orig");
785: $safeeval->permit("require");
786: $safeinit .= ';$external::target="'.$target.'";';
787: my $rndseed;
788: my ($symb,$courseid,$domain,$name) = &Apache::lonxml::whichuser();
789: $rndseed=&Apache::lonnet::rndseed($symb,$courseid,$domain,$name);
790: $safeinit .= ';$external::randomseed="'.$rndseed.'";';
791: &Apache::lonxml::debug("Setting rndseed to $rndseed");
792: &Apache::run::run($safeinit,$safeeval);
793:
794: }
795:
796: sub default_homework_load {
797: my ($safeeval)=@_;
798: &Apache::lonxml::debug('Loading default_homework');
799: my $default=&Apache::lonnet::getfile('/home/httpd/html/res/adm/includes/default_homework.lcpm');
800: if ($default eq -1) {
801: &Apache::lonxml::error("<b>Unable to find <i>default_homework.lcpm</i></b>");
802: } else {
803: &Apache::run::run($default,$safeeval);
804: $Apache::lonxml::default_homework_loaded=1;
805: }
806: }
807:
808: {
809: my $alarm_depth;
810: sub init_alarm {
811: alarm(0);
812: $alarm_depth=0;
813: }
814:
815: sub start_alarm {
816: if ($alarm_depth<1) {
817: my $old=alarm($Apache::lonnet::perlvar{'lonScriptTimeout'});
818: if ($old) {
819: &Apache::lonxml::error("Cancelled an alarm of $old, this shouldn't occur.");
820: }
821: }
822: $alarm_depth++;
823: }
824:
825: sub end_alarm {
826: $alarm_depth--;
827: if ($alarm_depth<1) { alarm(0); }
828: }
829: }
830: my $metamode_was;
831: sub startredirection {
832: if (!$Apache::lonxml::redirection) {
833: $metamode_was=$Apache::lonxml::metamode;
834: }
835: $Apache::lonxml::metamode=0;
836: $Apache::lonxml::redirection++;
837: push (@Apache::lonxml::outputstack, '');
838: }
839:
840: sub endredirection {
841: if (!$Apache::lonxml::redirection) {
842: &Apache::lonxml::error("Endredirection was called, before a startredirection, perhaps you have unbalanced tags. Some debuging information:".join ":",caller);
843: return '';
844: }
845: $Apache::lonxml::redirection--;
846: if (!$Apache::lonxml::redirection) {
847: $Apache::lonxml::metamode=$metamode_was;
848: }
849: pop @Apache::lonxml::outputstack;
850: }
851:
852: sub end_tag {
853: my ($tagstack,$parstack,$token)=@_;
854: pop(@$tagstack);
855: pop(@$parstack);
856: &decreasedepth($token);
857: }
858:
859: sub initdepth {
860: @Apache::lonxml::depthcounter=();
861: $Apache::lonxml::depth=-1;
862: $Apache::lonxml::olddepth=-1;
863: }
864:
865: my @timers;
866: my $lasttime;
867: sub increasedepth {
868: my ($token) = @_;
869: $Apache::lonxml::depth++;
870: $Apache::lonxml::depthcounter[$Apache::lonxml::depth]++;
871: if ($Apache::lonxml::depthcounter[$Apache::lonxml::depth]==1) {
872: $Apache::lonxml::olddepth=$Apache::lonxml::depth;
873: }
874: my $time;
875: if ($Apache::lonxml::debug eq "1") {
876: push(@timers,[&gettimeofday()]);
877: $time=&tv_interval($lasttime);
878: $lasttime=[&gettimeofday()];
879: }
880: my $spacing=' 'x($Apache::lonxml::depth-1);
881: my $curdepth=join('_',@Apache::lonxml::depthcounter);
882: &Apache::lonxml::debug("s$spacing$Apache::lonxml::depth : $Apache::lonxml::olddepth : $curdepth : $token->[1] : $time : \n");
883: #print "<br />s $Apache::lonxml::depth : $Apache::lonxml::olddepth : $curdepth : $token->[1]\n";
884: }
885:
886: sub decreasedepth {
887: my ($token) = @_;
888: $Apache::lonxml::depth--;
889: if ($Apache::lonxml::depth<$Apache::lonxml::olddepth-1) {
890: $#Apache::lonxml::depthcounter--;
891: $Apache::lonxml::olddepth=$Apache::lonxml::depth+1;
892: }
893: if ( $Apache::lonxml::depth < -1) {
894: &Apache::lonxml::warning(&mt("Missing tags, unable to properly run file."));
895: $Apache::lonxml::depth='-1';
896: }
897: my ($timer,$time);
898: if ($Apache::lonxml::debug eq "1") {
899: $timer=pop(@timers);
900: $time=&tv_interval($lasttime);
901: $lasttime=[&gettimeofday()];
902: }
903: my $spacing=' 'x$Apache::lonxml::depth;
904: my $curdepth=join('_',@Apache::lonxml::depthcounter);
905: &Apache::lonxml::debug("e$spacing$Apache::lonxml::depth : $Apache::lonxml::olddepth : $curdepth : $token->[1] : $time : ".&tv_interval($timer)."\n");
906: #print "<br />e $Apache::lonxml::depth : $Apache::lonxml::olddepth : $token->[1] : $curdepth\n";
907: }
908:
909: sub get_all_text_unbalanced {
910: #there is a copy of this in lonpublisher.pm
911: my($tag,$pars)= @_;
912: my $token;
913: my $result='';
914: $tag='<'.$tag.'>';
915: while ($token = $$pars[-1]->get_token) {
916: if (($token->[0] eq 'T')||($token->[0] eq 'C')||($token->[0] eq 'D')) {
917: $result.=$token->[1];
918: } elsif ($token->[0] eq 'PI') {
919: $result.=$token->[2];
920: } elsif ($token->[0] eq 'S') {
921: $result.=$token->[4];
922: } elsif ($token->[0] eq 'E') {
923: $result.=$token->[2];
924: }
925: if ($result =~ /\Q$tag\E/is) {
926: ($result,my $redo)=$result =~ /(.*)\Q$tag\E(.*)/is;
927: #&Apache::lonxml::debug('Got a winner with leftovers ::'.$2);
928: #&Apache::lonxml::debug('Result is :'.$1);
929: $redo=$tag.$redo;
930: &Apache::lonxml::newparser($pars,\$redo);
931: last;
932: }
933: }
934: return $result
935: }
936:
937: sub increment_counter {
938: my ($increment) = @_;
939: if (defined($increment) && $increment gt 0) {
940: $Apache::lonxml::counter+=$increment;
941: } else {
942: $Apache::lonxml::counter++;
943: }
944: $Apache::lonxml::counter_changed=1;
945: }
946:
947: sub init_counter {
948: if (defined($env{'form.counter'})) {
949: $Apache::lonxml::counter=$env{'form.counter'};
950: $Apache::lonxml::counter_changed=0;
951: } else {
952: $Apache::lonxml::counter=1;
953: $Apache::lonxml::counter_changed=1;
954: }
955: }
956:
957: sub store_counter {
958: &Apache::lonnet::appenv(('form.counter' => $Apache::lonxml::counter));
959: return '';
960: }
961:
962: sub get_all_text {
963: my($tag,$pars,$style)= @_;
964: my $gotfullstack=1;
965: if (ref($pars) ne 'ARRAY') {
966: $gotfullstack=0;
967: $pars=[$pars];
968: }
969: if (ref($style) ne 'HASH') {
970: $style={};
971: }
972: my $depth=0;
973: my $token;
974: my $result='';
975: if ( $tag =~ m:^/: ) {
976: my $tag=substr($tag,1);
977: #&Apache::lonxml::debug("have:$tag:");
978: my $top_empty=0;
979: while (($depth >=0) && ($#$pars > -1) && (!$top_empty)) {
980: while (($depth >=0) && ($token = $$pars[-1]->get_token)) {
981: #&Apache::lonxml::debug("e token:$token->[0]:$depth:$token->[1]:".$#$pars.":".$#Apache::lonxml::pwd);
982: if (($token->[0] eq 'T')||($token->[0] eq 'C')||($token->[0] eq 'D')) {
983: $result.=$token->[1];
984: } elsif ($token->[0] eq 'PI') {
985: $result.=$token->[2];
986: } elsif ($token->[0] eq 'S') {
987: if ($token->[1] =~ /^\Q$tag\E$/i) { $depth++; }
988: if ($token->[1] =~ /^LONCAPA_INTERNAL_TURN_STYLE_ON$/) { $Apache::lonxml::usestyle=1; }
989: if ($token->[1] =~ /^LONCAPA_INTERNAL_TURN_STYLE_OFF$/) { $Apache::lonxml::usestyle=0; }
990: $result.=$token->[4];
991: } elsif ($token->[0] eq 'E') {
992: if ( $token->[1] =~ /^\Q$tag\E$/i) { $depth--; }
993: #skip sending back the last end tag
994: if ($depth == 0 && exists($$style{'/'.$token->[1]}) && $Apache::lonxml::usestyle) {
995: my $string=
996: '<LONCAPA_INTERNAL_TURN_STYLE_OFF end="yes" />'.
997: $$style{'/'.$token->[1]}.
998: $token->[2].
999: '<LONCAPA_INTERNAL_TURN_STYLE_ON />';
1000: &Apache::lonxml::newparser($pars,\$string);
1001: #&Apache::lonxml::debug("reParsing $string");
1002: next;
1003: }
1004: if ($depth > -1) {
1005: $result.=$token->[2];
1006: } else {
1007: $$pars[-1]->unget_token($token);
1008: }
1009: }
1010: }
1011: if (($depth >=0) && ($#$pars == 0) ) { $top_empty=1; }
1012: if (($depth >=0) && ($#$pars > 0) ) {
1013: pop(@$pars);
1014: pop(@Apache::lonxml::pwd);
1015: }
1016: }
1017: if ($top_empty && $depth >= 0) {
1018: #never found the end tag ran out of text, throw error send back blank
1019: &error('Never found end tag for <'.$tag.
1020: '> current string <pre>'.
1021: &HTML::Entities::encode($result,'<>&"').
1022: '</pre>');
1023: if ($gotfullstack) {
1024: my $newstring='</'.$tag.'>'.$result;
1025: &Apache::lonxml::newparser($pars,\$newstring);
1026: }
1027: $result='';
1028: }
1029: } else {
1030: while ($#$pars > -1) {
1031: while ($token = $$pars[-1]->get_token) {
1032: #&Apache::lonxml::debug("s token:$token->[0]:$depth:$token->[1]");
1033: if (($token->[0] eq 'T')||($token->[0] eq 'C')||
1034: ($token->[0] eq 'D')) {
1035: $result.=$token->[1];
1036: } elsif ($token->[0] eq 'PI') {
1037: $result.=$token->[2];
1038: } elsif ($token->[0] eq 'S') {
1039: if ( $token->[1] =~ /^\Q$tag\E$/i) {
1040: $$pars[-1]->unget_token($token); last;
1041: } else {
1042: $result.=$token->[4];
1043: }
1044: if ($token->[1] =~ /^LONCAPA_INTERNAL_TURN_STYLE_ON$/) { $Apache::lonxml::usestyle=1; }
1045: if ($token->[1] =~ /^LONCAPA_INTERNAL_TURN_STYLE_OFF$/) { $Apache::lonxml::usestyle=0; }
1046: } elsif ($token->[0] eq 'E') {
1047: $result.=$token->[2];
1048: }
1049: }
1050: if (($#$pars > 0) ) {
1051: pop(@$pars);
1052: pop(@Apache::lonxml::pwd);
1053: } else { last; }
1054: }
1055: }
1056: #&Apache::lonxml::debug("Exit:$result:");
1057: return $result
1058: }
1059:
1060: sub newparser {
1061: my ($parser,$contentref,$dir) = @_;
1062: push (@$parser,HTML::LCParser->new($contentref));
1063: $$parser[-1]->xml_mode(1);
1064: $$parser[-1]->marked_sections(1);
1065: if ( $dir eq '' ) {
1066: push (@Apache::lonxml::pwd, $Apache::lonxml::pwd[$#Apache::lonxml::pwd]);
1067: } else {
1068: push (@Apache::lonxml::pwd, $dir);
1069: }
1070: }
1071:
1072: sub parstring {
1073: my ($token) = @_;
1074: my $temp='';
1075: foreach (@{$token->[3]}) {
1076: unless ($_=~/\W/) {
1077: my $val=$token->[2]->{$_};
1078: $val =~ s/([\%\@\\\"\'])/\\$1/g;
1079: $val =~ s/(\$[^{a-zA-Z_])/\\$1/g;
1080: $val =~ s/(\$)$/\\$1/;
1081: #if ($val =~ m/^[\%\@]/) { $val="\\".$val; }
1082: $temp .= "my \$$_=\"$val\";";
1083: }
1084: }
1085: return $temp;
1086: }
1087:
1088: sub writeallows {
1089: unless ($#extlinks>=0) { return; }
1090: my $thisurl='/res/'.&Apache::lonnet::declutter(shift);
1091: if ($env{'httpref.'.$thisurl}) {
1092: $thisurl=$env{'httpref.'.$thisurl};
1093: }
1094: my $thisdir=$thisurl;
1095: $thisdir=~s/\/[^\/]+$//;
1096: my %httpref=();
1097: foreach (@extlinks) {
1098: $httpref{'httpref.'.
1099: &Apache::lonnet::hreflocation($thisdir,$_)}=$thisurl;
1100: }
1101: @extlinks=();
1102: &Apache::lonnet::appenv(%httpref);
1103: }
1104:
1105: sub register_ssi {
1106: my ($url,%form)=@_;
1107: push (@Apache::lonxml::ssi_info,{'url'=>$url,'form'=>\%form});
1108: return '';
1109: }
1110:
1111: sub do_registered_ssi {
1112: foreach my $info (@Apache::lonxml::ssi_info) {
1113: my %form=%{ $info->{'form'}};
1114: my $url=$info->{'url'};
1115: &Apache::lonnet::ssi($url,%form);
1116: }
1117: }
1118: #
1119: # Afterburner handles anchors, highlights and links
1120: #
1121: sub afterburn {
1122: my $result=shift;
1123: &Apache::loncommon::get_unprocessed_cgi($ENV{'QUERY_STRING'},
1124: ['highlight','anchor','link']);
1125: if ($env{'form.highlight'}) {
1126: foreach (split(/\,/,$env{'form.highlight'})) {
1127: my $anchorname=$_;
1128: my $matchthis=$anchorname;
1129: $matchthis=~s/\_+/\\s\+/g;
1130: $result=~s/(\Q$matchthis\E)/\<font color=\"red\"\>$1\<\/font\>/gs;
1131: }
1132: }
1133: if ($env{'form.link'}) {
1134: foreach (split(/\,/,$env{'form.link'})) {
1135: my ($anchorname,$linkurl)=split(/\>/,$_);
1136: my $matchthis=$anchorname;
1137: $matchthis=~s/\_+/\\s\+/g;
1138: $result=~s/(\Q$matchthis\E)/\<a href=\"$linkurl\"\>$1\<\/a\>/gs;
1139: }
1140: }
1141: if ($env{'form.anchor'}) {
1142: my $anchorname=$env{'form.anchor'};
1143: my $matchthis=$anchorname;
1144: $matchthis=~s/\_+/\\s\+/g;
1145: $result=~s/(\Q$matchthis\E)/\<a name=\"$anchorname\"\>$1\<\/a\>/s;
1146: $result.=(<<"ENDSCRIPT");
1147: <script type="text/javascript">
1148: document.location.hash='$anchorname';
1149: </script>
1150: ENDSCRIPT
1151: }
1152: return $result;
1153: }
1154:
1155: sub storefile {
1156: my ($file,$contents)=@_;
1157: &Apache::lonnet::correct_line_ends(\$contents);
1158: if (my $fh=Apache::File->new('>'.$file)) {
1159: print $fh $contents;
1160: $fh->close();
1161: return 1;
1162: } else {
1163: &warning("Unable to save file $file");
1164: return 0;
1165: }
1166: }
1167:
1168: sub createnewhtml {
1169: my $title=&mt('Title of document goes here');
1170: my $body=&mt('Body of document goes here');
1171: my $filecontents=(<<SIMPLECONTENT);
1172: <!DOCTYPE html PUBLIC "-//W3C//DTD XHTML 1.1//EN" "http://www.w3.org/TR/xhtml/11/DTD/xhtml11.dtd">
1173: <html>
1174: <head>
1175: <title>$title</title>
1176: </head>
1177: <body bgcolor="#FFFFFF">
1178: $body
1179: </body>
1180: </html>
1181: SIMPLECONTENT
1182: return $filecontents;
1183: }
1184:
1185: sub createnewsty {
1186: my $filecontents=(<<SIMPLECONTENT);
1187: <definetag name="">
1188: <render>
1189: <web></web>
1190: <tex></tex>
1191: </render>
1192: </definetag>
1193: SIMPLECONTENT
1194: return $filecontents;
1195: }
1196:
1197:
1198: sub inserteditinfo {
1199: my ($result,$filecontents,$filetype)=@_;
1200: $filecontents = &HTML::Entities::encode($filecontents,'<>&"');
1201: # my $editheader='<a href="#editsection">Edit below</a><hr />';
1202: my $xml_help = '';
1203: my $initialize='';
1204: if ($filetype eq 'html') {
1205: my $addbuttons=&Apache::lonhtmlcommon::htmlareaaddbuttons();
1206: $initialize=&Apache::lonhtmlcommon::htmlareaheaders().
1207: &Apache::lonhtmlcommon::spellheader();
1208: if (!&Apache::lonhtmlcommon::htmlareablocked() &&
1209: &Apache::lonhtmlcommon::htmlareabrowser()) {
1210: $initialize.=(<<FULLPAGE);
1211: <script type="text/javascript">
1212: $addbuttons
1213:
1214: HTMLArea.loadPlugin("FullPage");
1215:
1216: function initDocument() {
1217: var editor=new HTMLArea("filecont",config);
1218: editor.registerPlugin(FullPage);
1219: editor.generate();
1220: }
1221: </script>
1222: FULLPAGE
1223: } else {
1224: $initialize.=(<<FULLPAGE);
1225: <script type="text/javascript">
1226: $addbuttons
1227: function initDocument() {
1228: }
1229: </script>
1230: FULLPAGE
1231: }
1232: $result=~s/\<body([^\>]*)\>/\<body onload="initDocument()" $1\>/i;
1233: $xml_help=&Apache::loncommon::helpLatexCheatsheet();
1234: }
1235: my $cleanbut = '';
1236: if ($filetype eq 'html') {
1237: $cleanbut='<input type="submit" name="attemptclean" value="'.
1238: &mt('Save and then attempt to clean HTML').'" />';
1239: }
1240: my $titledisplay=&display_title();
1241: my %lt=&Apache::lonlocal::texthash('st' => 'Save this',
1242: 'vi' => 'View',
1243: 'ed' => 'Edit');
1244: my $buttons=(<<BUTTONS);
1245: $cleanbut
1246: <input type="submit" name="savethisfile" accesskey="s" value="$lt{'st'}" />
1247: <input type="submit" name="viewmode" accesskey="v" value="$lt{'vi'}" />
1248: BUTTONS
1249: $buttons.=&Apache::lonhtmlcommon::spelllink('xmledit','filecont');
1250: $buttons.=&Apache::lonhtmlcommon::htmlareaselectactive('filecont');
1251: my $editfooter=(<<ENDFOOTER);
1252: $initialize
1253: <hr />
1254: <a name="editsection" />
1255: <form method="post" name="xmledit">
1256: $xml_help
1257: <input type="hidden" name="editmode" value="$lt{'ed'}" />
1258: $buttons<br />
1259: <textarea style="width:100%" cols="80" rows="44" name="filecont" id="filecont">$filecontents</textarea>
1260: <br />$buttons
1261: <br />
1262: </form>
1263: $titledisplay
1264: </body>
1265: ENDFOOTER
1266: # $result=~s/(\<body[^\>]*\>)/$1$editheader/is;
1267: $result=~s/(\<\/body\>)/$editfooter/is;
1268: return $result;
1269: }
1270:
1271: sub get_target {
1272: my $viewgrades=&Apache::lonnet::allowed('vgr',$env{'request.course.id'});
1273: if ( $env{'request.state'} eq 'published') {
1274: if ( defined($env{'form.grade_target'})
1275: && ($viewgrades == 'F' )) {
1276: return ($env{'form.grade_target'});
1277: } elsif (defined($env{'form.grade_target'})) {
1278: if (($env{'form.grade_target'} eq 'web') ||
1279: ($env{'form.grade_target'} eq 'tex') ) {
1280: return $env{'form.grade_target'}
1281: } else {
1282: return 'web';
1283: }
1284: } else {
1285: return 'web';
1286: }
1287: } elsif ($env{'request.state'} eq 'construct') {
1288: if ( defined($env{'form.grade_target'})) {
1289: return ($env{'form.grade_target'});
1290: } else {
1291: return 'web';
1292: }
1293: } else {
1294: return 'web';
1295: }
1296: }
1297:
1298: sub handler {
1299: my $request=shift;
1300:
1301: my $target=&get_target();
1302:
1303: $Apache::lonxml::debug=$env{'user.debug'};
1304:
1305: &Apache::loncommon::content_type($request,'text/html');
1306: &Apache::loncommon::no_cache($request);
1307: if ($env{'request.state'} eq 'published') {
1308: $request->set_last_modified(&Apache::lonnet::metadata($request->uri,
1309: 'lastrevisiondate'));
1310: }
1311: $request->send_http_header;
1312:
1313: return OK if $request->header_only;
1314:
1315:
1316: my $file=&Apache::lonnet::filelocation("",$request->uri);
1317: my $filetype;
1318: if ($file =~ /\.sty$/) {
1319: $filetype='sty';
1320: } else {
1321: $filetype='html';
1322: }
1323: #
1324: # Edit action? Save file.
1325: #
1326: unless ($env{'request.state'} eq 'published') {
1327: if (($env{'form.savethisfile'}) || ($env{'form.attemptclean'})) {
1328: if (&storefile($file,$env{'form.filecont'})) {
1329: &Apache::lonxml::info("<font COLOR=\"#0000FF\">".
1330: &mt('Updated').": ".
1331: &Apache::lonlocal::locallocaltime(time).
1332: " </font>");
1333: }
1334: }
1335: }
1336: my %mystyle;
1337: my $result = '';
1338: my $filecontents=&Apache::lonnet::getfile($file);
1339: if ($filecontents eq -1) {
1340: my $bodytag=&Apache::loncommon::bodytag('File Error');
1341: my $fnf=&mt('File not found');
1342: $result=(<<ENDNOTFOUND);
1343: <html>
1344: <head>
1345: <title>$fnf</title>
1346: </head>
1347: $bodytag
1348: <b>$fnf: $file</b>
1349: </body>
1350: </html>
1351: ENDNOTFOUND
1352: $filecontents='';
1353: if ($env{'request.state'} ne 'published') {
1354: if ($filetype eq 'sty') {
1355: $filecontents=&createnewsty();
1356: } else {
1357: $filecontents=&createnewhtml();
1358: }
1359: $env{'form.editmode'}='Edit'; #force edit mode
1360: }
1361: } else {
1362: unless ($env{'request.state'} eq 'published') {
1363: if ($filecontents=~/BEGIN LON-CAPA Internal/) {
1364: &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.'));
1365: }
1366:
1367: if ($env{'form.attemptclean'}) {
1368: $filecontents=&htmlclean($filecontents,1);
1369: }
1370: #
1371: # we are in construction space, see if edit mode forced
1372: &Apache::loncommon::get_unprocessed_cgi
1373: ($ENV{'QUERY_STRING'},['editmode']);
1374: }
1375: if (!$env{'form.editmode'} || $env{'form.viewmode'}) {
1376: $result = &Apache::lonxml::xmlparse($request,$target,$filecontents,
1377: '',%mystyle);
1378: undef($Apache::lonhomework::parsing_a_task);
1379: }
1380: }
1381:
1382: #
1383: # Edit action? Insert editing commands
1384: #
1385: unless ($env{'request.state'} eq 'published') {
1386: if ($env{'form.editmode'} && (!($env{'form.viewmode'}))) {
1387: my $displayfile=$request->uri;
1388: $displayfile=~s/^\/[^\/]*//;
1389: my $bodytag='<body bgcolor="#FFFFFF">';
1390: if ($env{'environment.remote'} eq 'off') {
1391: $bodytag=&Apache::loncommon::bodytag();
1392: }
1393: $result='<html>'.$bodytag.
1394: &Apache::lonxml::message_location().'<h3>'.
1395: $displayfile.
1396: '</h3></body></html>';
1397: $result=&inserteditinfo($result,$filecontents,$filetype);
1398: }
1399: }
1400: if ($filetype eq 'html') { writeallows($request->uri); }
1401:
1402:
1403: &Apache::lonxml::add_messages(\$result);
1404: $request->print($result);
1405:
1406: return OK;
1407: }
1408:
1409: sub display_title {
1410: my $result;
1411: if ($env{'request.state'} eq 'construct') {
1412: my $title=&Apache::lonnet::gettitle();
1413: if (!defined($title) || $title eq '') {
1414: $title = $env{'request.filename'};
1415: $title = substr($title, rindex($title, '/') + 1);
1416: }
1417: $result = "<script type='text/javascript'>top.document.title = '$title - LON-CAPA Construction Space';</script>";
1418: }
1419: return $result;
1420: }
1421:
1422: sub debug {
1423: if ($Apache::lonxml::debug eq "1") {
1424: $|=1;
1425: my $request=$Apache::lonxml::request;
1426: if (!$request) { $request=Apache->request; }
1427: $request->print('<font size="-2"><pre>DEBUG:'.&HTML::Entities::encode($_[0],'<>&"')."</pre></font>\n");
1428: #&Apache::lonnet::logthis($_[0]);
1429: }
1430: }
1431:
1432: sub show_error_warn_msg {
1433: if ($env{'request.filename'} eq '/home/httpd/html/res/lib/templates/simpleproblem.problem' &&
1434: &Apache::lonnet::allowed('mdc',$env{'request.course.id'})) {
1435: return 1;
1436: }
1437: return (($Apache::lonxml::debug eq 1) ||
1438: ($env{'request.state'} eq 'construct') ||
1439: ($Apache::lonhomework::browse eq 'F'
1440: &&
1441: $env{'form.show_errors'} eq 'on'));
1442: }
1443:
1444: sub error {
1445: $errorcount++;
1446: if ( &show_error_warn_msg() ) {
1447: # If printing in construction space, put the error inside <pre></pre>
1448: push(@Apache::lonxml::error_messages,
1449: $Apache::lonxml::warnings_error_header.
1450: "<b>ERROR:</b>".join("<br />\n",@_)."<br />\n");
1451: $Apache::lonxml::warnings_error_header='';
1452: } else {
1453: my $errormsg;
1454: my ($symb)=&Apache::lonnet::symbread();
1455: if ( !$symb ) {
1456: #public or browsers
1457: $errormsg=&mt("An error occured while processing this resource. The author has been notified.");
1458: }
1459: #notify author
1460: &Apache::lonmsg::author_res_msg($env{'request.filename'},join('<br />',@_));
1461: #notify course
1462: if ( $symb && $env{'request.course.id'} ) {
1463: my (undef,%users)=&Apache::lonfeedback::decide_receiver(undef,0,1,1,1);
1464: my $declutter=&Apache::lonnet::declutter($env{'request.filename'});
1465: my @userlist;
1466: foreach (keys %users) {
1467: my ($user,$domain) = split(/:/, $_);
1468: push(@userlist,"$user\@$domain");
1469: &Apache::lonmsg::user_normal_msg($user,$domain,
1470: "Error [$declutter]",join('<br />',@_));
1471: }
1472: if ($env{'request.role.adv'}) {
1473: $errormsg=&mt("An error occured while processing this resource. The course personnel ([_1]) and the author have been notified.",join(', ',@userlist));
1474: } else {
1475: $errormsg=&mt("An error occured while processing this resource. The instructor has been notified.");
1476: }
1477: }
1478: push(@Apache::lonxml::error_messages,"<b>$errormsg</b> <br />");
1479: }
1480: }
1481:
1482: sub warning {
1483: $warningcount++;
1484:
1485: if ($env{'form.grade_target'} ne 'tex') {
1486: if ( &show_error_warn_msg() ) {
1487: my $request=$Apache::lonxml::request;
1488: if (!$request) { $request=Apache->request; }
1489: push(@Apache::lonxml::warning_messages,
1490: $Apache::lonxml::warnings_error_header.
1491: "<b>W</b>ARNING<b>:</b>".join('<br />',@_)."<br />\n");
1492: $Apache::lonxml::warnings_error_header='';
1493: }
1494: }
1495: }
1496:
1497: sub info {
1498: if ($env{'form.grade_target'} ne 'tex'
1499: && $env{'request.state'} eq 'construct') {
1500: push(@Apache::lonxml::info_messages,join('<br />',@_)."<br />\n");
1501: }
1502: }
1503:
1504: sub message_location {
1505: return '__LONCAPA_INTERNAL_MESSAGE_LOCATION__';
1506: }
1507:
1508: sub add_messages {
1509: my ($msg)=@_;
1510: my $result=join(' ',
1511: @Apache::lonxml::info_messages,
1512: @Apache::lonxml::error_messages,
1513: @Apache::lonxml::warning_messages);
1514: undef(@Apache::lonxml::info_messages);
1515: undef(@Apache::lonxml::error_messages);
1516: undef(@Apache::lonxml::warning_messages);
1517: $$msg=~s/__LONCAPA_INTERNAL_MESSAGE_LOCATION__/$result/;
1518: $$msg=~s/__LONCAPA_INTERNAL_MESSAGE_LOCATION__//g;
1519: }
1520:
1521: sub get_param {
1522: my ($param,$parstack,$safeeval,$context,$case_insensitive) = @_;
1523: if ( ! $context ) { $context = -1; }
1524: my $args ='';
1525: if ( $#$parstack > (-2-$context) ) { $args=$$parstack[$context]; }
1526: if ( ! $Apache::lonxml::usestyle ) {
1527: $args=$Apache::lonxml::style_values.$args;
1528: }
1529: if ( ! $args ) { return undef; }
1530: if ( $case_insensitive ) {
1531: if ($args =~ s/(my \$)(\Q$param\E)(=\")/$1.lc($2).$3/ei) {
1532: return &Apache::run::run("{$args;".'return $'.$param.'}',
1533: $safeeval); #'
1534: } else {
1535: return undef;
1536: }
1537: } else {
1538: if ( $args =~ /my \$\Q$param\E=\"/ ) {
1539: return &Apache::run::run("{$args;".'return $'.$param.'}',
1540: $safeeval); #'
1541: } else {
1542: return undef;
1543: }
1544: }
1545: }
1546:
1547: sub get_param_var {
1548: my ($param,$parstack,$safeeval,$context,$case_insensitive) = @_;
1549: if ( ! $context ) { $context = -1; }
1550: my $args ='';
1551: if ( $#$parstack > (-2-$context) ) { $args=$$parstack[$context]; }
1552: if ( ! $Apache::lonxml::usestyle ) {
1553: $args=$Apache::lonxml::style_values.$args;
1554: }
1555: &Apache::lonxml::debug("Args are $args param is $param");
1556: if ($case_insensitive) {
1557: if (! ($args=~s/(my \$)(\Q$param\E)(=\")/$1.lc($2).$3/ei)) {
1558: return undef;
1559: }
1560: } elsif ( $args !~ /my \$\Q$param\E=\"/ ) { return undef; }
1561: my $value=&Apache::run::run("{$args;".'return $'.$param.'}',$safeeval); #'
1562: &Apache::lonxml::debug("first run is $value");
1563: if ($value =~ /^[\$\@\%][a-zA-Z_]\w*$/) {
1564: &Apache::lonxml::debug("doing second");
1565: my @result=&Apache::run::run("return $value",$safeeval,1);
1566: if (!defined($result[0])) {
1567: return $value
1568: } else {
1569: if (wantarray) { return @result; } else { return $result[0]; }
1570: }
1571: } else {
1572: return $value;
1573: }
1574: }
1575:
1576: sub register_insert {
1577: my @data = split /\n/, &Apache::lonnet::getfile('/home/httpd/lonTabs/insertlist.tab');
1578: my $i;
1579: my $tagnum=0;
1580: my @order;
1581: for ($i=0;$i < $#data; $i++) {
1582: my $line = $data[$i];
1583: if ( $line =~ /^\#/ || $line =~ /^\s*\n/) { next; }
1584: if ( $line =~ /TABLE/ ) { last; }
1585: my ($tag,$descrip,$color,$function,$show,$helpfile,$helpdesc) = split(/,/, $line);
1586: if ($tag) {
1587: $insertlist{"$tagnum.tag"} = $tag;
1588: $insertlist{"$tagnum.description"} = $descrip;
1589: $insertlist{"$tagnum.color"} = $color;
1590: $insertlist{"$tagnum.function"} = $function;
1591: if (!defined($show)) { $show='yes'; }
1592: $insertlist{"$tagnum.show"}= $show;
1593: $insertlist{"$tagnum.helpfile"} = $helpfile;
1594: $insertlist{"$tagnum.helpdesc"} = $helpdesc;
1595: $insertlist{"$tag.num"}=$tagnum;
1596: $tagnum++;
1597: }
1598: }
1599: $i++; #skipping TABLE line
1600: $tagnum = 0;
1601: for (;$i < $#data;$i++) {
1602: my $line = $data[$i];
1603: my ($mnemonic,@which) = split(/ +/,$line);
1604: my $tag = $insertlist{"$tagnum.tag"};
1605: for (my $j=0;$j <=$#which;$j++) {
1606: if ( $which[$j] eq 'Y' ) {
1607: if ($insertlist{"$j.show"} ne 'no') {
1608: push(@{ $insertlist{"$tag.which"} },$j);
1609: }
1610: }
1611: }
1612: $tagnum++;
1613: }
1614: }
1615:
1616: sub description {
1617: my ($token)=@_;
1618: my $tagnum;
1619: my $tag=$token->[1];
1620: foreach my $namespace (reverse @Apache::lonxml::namespace) {
1621: my $testtag=$namespace.'::'.$tag;
1622: $tagnum=$insertlist{"$testtag.num"};
1623: if (defined($tagnum)) { last; }
1624: }
1625: if (!defined ($tagnum)) { $tagnum=$Apache::lonxml::insertlist{"$tag.num"}; }
1626: return $insertlist{$tagnum.'.description'};
1627: }
1628:
1629: # Returns a list containing the help file, and the description
1630: sub helpinfo {
1631: my ($token)=@_;
1632: my $tagnum;
1633: my $tag=$token->[1];
1634: foreach my $namespace (reverse @Apache::lonxml::namespace) {
1635: my $testtag=$namespace.'::'.$tag;
1636: $tagnum=$insertlist{"$testtag.num"};
1637: if (defined($tagnum)) { last; }
1638: }
1639: if (!defined ($tagnum)) { $tagnum=$Apache::lonxml::insertlist{"$tag.num"}; }
1640: return ($insertlist{$tagnum.'.helpfile'}, $insertlist{$tagnum.'.helpdesc'});
1641: }
1642:
1643: # ----------------------------------------------------------------- whichuser
1644: # returns a list of $symb, $courseid, $domain, $name that is correct for
1645: # calls to lonnet functions for this setup.
1646: # - looks for form.grade_ parameters
1647: sub whichuser {
1648: my ($passedsymb)=@_;
1649: my ($symb,$courseid,$domain,$name,$publicuser);
1650: if (defined($env{'form.grade_symb'})) {
1651: my ($tmp_courseid)=
1652: &Apache::loncommon::get_env_multiple('form.grade_courseid');
1653: my $allowed=&Apache::lonnet::allowed('vgr',$tmp_courseid);
1654: if (!$allowed &&
1655: exists($env{'request.course.sec'}) &&
1656: $env{'request.course.sec'} !~ /^\s*$/) {
1657: $allowed=&Apache::lonnet::allowed('vgr',$tmp_courseid.
1658: '/'.$env{'request.course.sec'});
1659: }
1660: if ($allowed) {
1661: ($symb)=&Apache::loncommon::get_env_multiple('form.grade_symb');
1662: $courseid=$tmp_courseid;
1663: ($domain)=&Apache::loncommon::get_env_multiple('form.grade_domain');
1664: ($name)=&Apache::loncommon::get_env_multiple('form.grade_username');
1665: return ($symb,$courseid,$domain,$name,$publicuser);
1666: }
1667: }
1668: if (!$passedsymb) {
1669: $symb=&Apache::lonnet::symbread();
1670: } else {
1671: $symb=$passedsymb;
1672: }
1673: $courseid=$env{'request.course.id'};
1674: $domain=$env{'user.domain'};
1675: $name=$env{'user.name'};
1676: if ($name eq 'public' && $domain eq 'public') {
1677: if (!defined($env{'form.username'})) {
1678: $env{'form.username'}.=time.rand(10000000);
1679: }
1680: $name.=$env{'form.username'};
1681: }
1682: return ($symb,$courseid,$domain,$name,$publicuser);
1683: }
1684:
1685: 1;
1686: __END__
1687:
1688:
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