1: # The LearningOnline Network with CAPA
2: # XML Parser Module
3: #
4: # $Id: lonxml.pm,v 1.359 2005/02/28 22:21:40 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 $discussion=&Apache::lonfeedback::list_discussion($mode,$status);
182: if ($target eq 'tex') {
183: $discussion.='<tex>\keephidden{ENDOFPROBLEM}\vskip 0.5mm\noindent\makebox[\textwidth/$number_of_columns][b]{\hrulefill}\end{document}</tex>';
184: &Apache::lonxml::newparser($parser,\$discussion,'');
185: return '';
186: } else {
187: return $discussion.'</html>';
188: }
189: }
190:
191: sub tokeninputfield {
192: my $defhost=$Apache::lonnet::perlvar{'lonHostID'};
193: $defhost=~tr/a-z/A-Z/;
194: return (<<ENDINPUTFIELD)
195: <script type="text/javascript">
196: function updatetoken() {
197: var comp=new Array;
198: var barcode=unescape(document.tokeninput.barcode.value);
199: comp=barcode.split('*');
200: if (typeof(comp[0])!="undefined") {
201: document.tokeninput.codeone.value=comp[0];
202: }
203: if (typeof(comp[1])!="undefined") {
204: document.tokeninput.codetwo.value=comp[1];
205: }
206: if (typeof(comp[2])!="undefined") {
207: comp[2]=comp[2].toUpperCase();
208: document.tokeninput.codethree.value=comp[2];
209: }
210: document.tokeninput.barcode.value='';
211: }
212: </script>
213: <form method="post" name="tokeninput">
214: <table border="2" bgcolor="#FFFFBB">
215: <tr><th>DocID Checkin</th></tr>
216: <tr><td>
217: <table>
218: <tr>
219: <td>Scan in Barcode</td>
220: <td><input type="text" size="22" name="barcode"
221: onChange="updatetoken()"/></td>
222: </tr>
223: <tr><td><i>or</i> Type in DocID</td>
224: <td>
225: <input type="text" size="5" name="codeone" />
226: <b><font size="+2">*</font></b>
227: <input type="text" size="5" name="codetwo" />
228: <b><font size="+2">*</font></b>
229: <input type="text" size="10" name="codethree" value="$defhost"
230: onChange="this.value=this.value.toUpperCase()" />
231: </td></tr>
232: </table>
233: </td></tr>
234: <tr><td><input type="submit" value="Check in DocID" /></td></tr>
235: </table>
236: </form>
237: ENDINPUTFIELD
238: }
239:
240: sub maketoken {
241: my ($symb,$tuname,$tudom,$tcrsid)=@_;
242: unless ($symb) {
243: $symb=&Apache::lonnet::symbread();
244: }
245: unless ($tuname) {
246: $tuname=$ENV{'user.name'};
247: $tudom=$ENV{'user.domain'};
248: $tcrsid=$ENV{'request.course.id'};
249: }
250:
251: return &Apache::lonnet::checkout($symb,$tuname,$tudom,$tcrsid);
252: }
253:
254: sub printtokenheader {
255: my ($target,$token,$tsymb,$tcrsid,$tudom,$tuname)=@_;
256: unless ($token) { return ''; }
257:
258: my ($symb,$courseid,$domain,$name) = &Apache::lonxml::whichuser();
259: unless ($tsymb) {
260: $tsymb=$symb;
261: }
262: unless ($tuname) {
263: $tuname=$name;
264: $tudom=$domain;
265: $tcrsid=$courseid;
266: }
267:
268: my %reply=&Apache::lonnet::get('environment',
269: ['firstname','middlename','lastname','generation'],
270: $tudom,$tuname);
271: my $plainname=$reply{'firstname'}.' '.
272: $reply{'middlename'}.' '.
273: $reply{'lastname'}.' '.
274: $reply{'generation'};
275:
276: if ($target eq 'web') {
277: my %idhash=&Apache::lonnet::idrget($tudom,($tuname));
278: return
279: '<img align="right" src="/cgi-bin/barcode.png?encode='.$token.'" />'.
280: &mt('Checked out for').' '.$plainname.
281: '<br />'.&mt('User').': '.$tuname.' at '.$tudom.
282: '<br />'.&mt('ID').': '.$idhash{$tuname}.
283: '<br />'.&mt('CourseID').': '.$tcrsid.
284: '<br />'.&mt('Course').': '.$ENV{'course.'.$tcrsid.'.description'}.
285: '<br />'.&mt('DocID').': '.$token.
286: '<br />'.&mt('Time').': '.&Apache::lonlocal::locallocaltime().'<hr />';
287: } else {
288: return $token;
289: }
290: }
291:
292: sub fontsettings {
293: my $headerstring='';
294: if (($ENV{'browser.os'} eq 'mac') && (!$ENV{'browser.mathml'})) {
295: $headerstring.=
296: '<meta Content-Type="text/html; charset=x-mac-roman" />';
297: } elsif (!$ENV{'browser.mathml'} && $ENV{'browser.unicode'}) {
298: $headerstring.=
299: '<meta http-equiv="Content-Type" content="text/html; charset=utf-8" />';
300: }
301: return $headerstring;
302: }
303:
304: sub printalltags {
305: my $temp;
306: foreach $temp (sort keys %Apache::lonxml::alltags) {
307: &Apache::lonxml::debug("$temp -- ".
308: join(',',@{ $Apache::lonxml::alltags{$temp} }));
309: }
310: }
311:
312: sub xmlparse {
313: my ($request,$target,$content_file_string,$safeinit,%style_for_target) = @_;
314:
315: &setup_globals($request,$target);
316: &Apache::inputtags::initialize_inputtags();
317: &Apache::outputtags::initialize_outputtags();
318: &Apache::edit::initialize_edit();
319: &Apache::londefdef::initialize_londefdef();
320:
321: #
322: # do we have a course style file?
323: #
324:
325: if ($ENV{'request.course.id'} && $ENV{'request.state'} ne 'construct') {
326: my $bodytext=
327: $ENV{'course.'.$ENV{'request.course.id'}.'.default_xml_style'};
328: if ($bodytext) {
329: foreach my $file (split(',',$bodytext)) {
330: my $location=&Apache::lonnet::filelocation('',$file);
331: my $styletext=&Apache::lonnet::getfile($location);
332: if ($styletext ne '-1') {
333: %style_for_target = (%style_for_target,
334: &Apache::style::styleparser($target,$styletext));
335: }
336: }
337: }
338: } elsif ($ENV{'construct.style'} && ($ENV{'request.state'} eq 'construct')) {
339: my $location=&Apache::lonnet::filelocation('',$ENV{'construct.style'});
340: my $styletext=&Apache::lonnet::getfile($location);
341: if ($styletext ne '-1') {
342: %style_for_target = (%style_for_target,
343: &Apache::style::styleparser($target,$styletext));
344: }
345: }
346: #&printalltags();
347: my @pars = ();
348: my $pwd=$ENV{'request.filename'};
349: $pwd =~ s:/[^/]*$::;
350: &newparser(\@pars,\$content_file_string,$pwd);
351:
352: my $safeeval = new Safe;
353: my $safehole = new Safe::Hole;
354: &init_safespace($target,$safeeval,$safehole,$safeinit);
355: #-------------------- Redefinition of the target in the case of compound target
356:
357: ($target, my @tenta) = split('&&',$target);
358:
359: my @stack = ();
360: my @parstack = ();
361: &initdepth();
362: &init_alarm();
363: my $finaloutput = &inner_xmlparse($target,\@stack,\@parstack,\@pars,
364: $safeeval,\%style_for_target);
365:
366: if ($ENV{'request.uri'}) {
367: &writeallows($ENV{'request.uri'});
368: }
369: &do_registered_ssi();
370: if ($Apache::lonxml::counter_changed) { &store_counter() }
371: return $finaloutput;
372: }
373:
374: sub htmlclean {
375: my ($raw,$full)=@_;
376: # Take care of CRLF etc
377:
378: $raw=~s/\r\f/\n/gs; $raw=~s/\f\r/\n/gs;
379: $raw=~s/\r\n/\n/gs; $raw=~s/\n\r/\n/gs;
380: $raw=~s/\f/\n/gs; $raw=~s/\r/\n/gs;
381: $raw=~s/\&\#10\;/\n/gs; $raw=~s/\&\#13\;/\n/gs;
382:
383: # Generate empty tags, remove wrong end tags
384: $raw=~s/\<(br|hr|img|meta|allow|basefont)([^\>\/]*?)\>/\<$1$2 \/\>/gis;
385: $raw=~s/\<\/(br|hr|img|meta|allow|basefont)\>//gis;
386: unless ($full) {
387: $raw=~s/\<[\/]*(body|head|html)\>//gis;
388: }
389: # Make standard tags lowercase
390: foreach ('html','body','head','meta','h1','h2','h3','h4','b','i','m',
391: 'table','tr','td','th','p','br','hr','img','embed','font',
392: 'a','strong','center','title','basefont','li','ol','ul',
393: 'input','select','form','option','script','pre') {
394: $raw=~s/\<$_\s*\>/\<$_\>/gis;
395: $raw=~s/\<\/$_\s*\>/<\/$_\>/gis;
396: $raw=~s/\<$_\s([^\>]*)\>/<$_ $1\>/gis;
397: }
398: return $raw;
399: }
400:
401: sub latex_special_symbols {
402: my ($string,$where)=@_;
403: if ($where eq 'header') {
404: $string =~ s/(\\|_|\^)/ /g;
405: $string =~ s/(\$|%|\{|\})/\\$1/g;
406: $string =~ s/_/ /g;
407: $string=&Apache::lonprintout::character_chart($string);
408: # any & or # leftover should be safe to just escape
409: $string=~s/([^\\])\&/$1\\\&/g;
410: $string=~s/([^\\])\#/$1\\\#/g;
411: } else {
412: $string=~s/\\/\\ensuremath{\\backslash}/g;
413: $string=~s/([^\\]|^)\%/$1\\\%/g;
414: $string=~s/([^\\]|^)\$/$1\\\$/g;
415: $string=~s/([^\\])\_/$1\\_/g;
416: $string=~s/\$\$/\$\\\$/g;
417: $string=~s/\_\_/\_\\\_/g;
418: $string=~s/\#\#/\#\\\#/g;
419: $string=~s/([^\\]|^)(\~|\^)/$1\\$2\\strut /g;
420: $string=~s/(>|<)/\\ensuremath\{$1\}/g; #more or less
421: $string=&Apache::lonprintout::character_chart($string);
422: # any & or # leftover should be safe to just escape
423: $string=~s/([^\\]|^)\&/$1\\\&/g;
424: $string=~s/([^\\]|^)\#/$1\\\#/g;
425: $string=~s/\|/\$\\mid\$/g;
426: #single { or } How to escape?
427: }
428: return $string;
429: }
430:
431: sub inner_xmlparse {
432: my ($target,$stack,$parstack,$pars,$safeeval,$style_for_target)=@_;
433: my $finaloutput = '';
434: my $result;
435: my $token;
436: my $dontpop=0;
437: while ( $#$pars > -1 ) {
438: while ($token = $$pars['-1']->get_token) {
439: if (($token->[0] eq 'T') || ($token->[0] eq 'C') ) {
440: if ($metamode<1) {
441: my $text=$token->[1];
442: if ($token->[0] eq 'C' && $target eq 'tex') {
443: $text = '';
444: # $text = '%'.$text."\n";
445: }
446: $result.=$text;
447: }
448: } elsif (($token->[0] eq 'D')) {
449: if ($metamode<1 && $target eq 'web') {
450: my $text=$token->[1];
451: $result.=$text;
452: }
453: } elsif ($token->[0] eq 'PI') {
454: if ($metamode<1 && $target eq 'web') {
455: $result=$token->[2];
456: }
457: } elsif ($token->[0] eq 'S') {
458: # add tag to stack
459: push (@$stack,$token->[1]);
460: # add parameters list to another stack
461: push (@$parstack,&parstring($token));
462: &increasedepth($token);
463: if ($Apache::lonxml::usestyle &&
464: exists($$style_for_target{$token->[1]})) {
465: $Apache::lonxml::usestyle=0;
466: my $string=$$style_for_target{$token->[1]}.
467: '<LONCAPA_INTERNAL_TURN_STYLE_ON />';
468: &Apache::lonxml::newparser($pars,\$string);
469: $Apache::lonxml::style_values=$$parstack[-1];
470: $Apache::lonxml::style_end_values=$$parstack[-1];
471: } else {
472: $result = &callsub("start_$token->[1]", $target, $token, $stack,
473: $parstack, $pars, $safeeval, $style_for_target);
474: }
475: } elsif ($token->[0] eq 'E') {
476: if ($Apache::lonxml::usestyle &&
477: exists($$style_for_target{'/'."$token->[1]"})) {
478: $Apache::lonxml::usestyle=0;
479: my $string=$$style_for_target{'/'.$token->[1]}.
480: '<LONCAPA_INTERNAL_TURN_STYLE_ON end="'.$token->[1].'" />';
481: &Apache::lonxml::newparser($pars,\$string);
482: $Apache::lonxml::style_values=$Apache::lonxml::style_end_values;
483: $Apache::lonxml::style_end_values='';
484: $dontpop=1;
485: } else {
486: #clear out any tags that didn't end
487: while ($token->[1] ne $$stack['-1'] && ($#$stack > -1)) {
488: my $lasttag=$$stack[-1];
489: if ($token->[1] =~ /^\Q$lasttag\E$/i) {
490: &Apache::lonxml::warning('Using tag </'.$token->[1].'> on line '.$token->[3].' as end tag to <'.$$stack[-1].'>');
491: last;
492: } else {
493: &Apache::lonxml::warning('Found tag </'.$token->[1].'> on line '.$token->[3].' when looking for </'.$$stack[-1].'> in file');
494: &end_tag($stack,$parstack,$token);
495: }
496: }
497: $result = &callsub("end_$token->[1]", $target, $token, $stack,
498: $parstack, $pars,$safeeval, $style_for_target);
499: }
500: } else {
501: &Apache::lonxml::error("Unknown token event :$token->[0]:$token->[1]:");
502: }
503: #evaluate variable refs in result
504: if ($Apache::lonxml::post_evaluate &&$result ne "") {
505: my $extras;
506: if (!$Apache::lonxml::usestyle) {
507: $extras=$Apache::lonxml::style_values;
508: }
509: if ( $#$parstack > -1 ) {
510: $result=&Apache::run::evaluate($result,$safeeval,$extras.$$parstack[-1]);
511: } else {
512: $result= &Apache::run::evaluate($result,$safeeval,$extras);
513: }
514: }
515: $Apache::lonxml::post_evaluate=1;
516:
517: if (($token->[0] eq 'T') || ($token->[0] eq 'C') || ($token->[0] eq 'D') ) {
518: #Style file definitions should be correct
519: if ($target eq 'tex' && ($Apache::lonxml::usestyle)) {
520: $result=&latex_special_symbols($result);
521: }
522: }
523:
524: if ($Apache::lonxml::redirection) {
525: $Apache::lonxml::outputstack['-1'] .= $result;
526: } else {
527: $finaloutput.=$result;
528: }
529: $result = '';
530:
531: if ($token->[0] eq 'E' && !$dontpop) {
532: &end_tag($stack,$parstack,$token);
533: }
534: $dontpop=0;
535: }
536: if ($#$pars > -1) {
537: pop @$pars;
538: pop @Apache::lonxml::pwd;
539: }
540: }
541:
542: # if ($target eq 'meta') {
543: # $finaloutput.=&endredirection;
544: # }
545:
546:
547: if (($ENV{'QUERY_STRING'}) && ($target eq 'web')) {
548: $finaloutput=&afterburn($finaloutput);
549: }
550: return $finaloutput;
551: }
552:
553: ##
554: ## Looks to see if there is a subroutine defined for this tag. If so, call it,
555: ## otherwise do not call it as we do not know what it is.
556: ##
557: sub callsub {
558: my ($sub,$target,$token,$tagstack,$parstack,$parser,$safeeval,$style)=@_;
559: my $currentstring='';
560: my $nodefault;
561: {
562: my $sub1;
563: no strict 'refs';
564: my $tag=$token->[1];
565: # get utterly rid of extended html tags
566: if ($tag=~/^x\-/i) { return ''; }
567: my $space=$Apache::lonxml::alltags{$tag}[-1];
568: if (!$space) {
569: $tag=~tr/A-Z/a-z/;
570: $sub=~tr/A-Z/a-z/;
571: $space=$Apache::lonxml::alltags{$tag}[-1]
572: }
573:
574: my $deleted=0;
575: $Apache::lonxml::curdepth=join('_',@Apache::lonxml::depthcounter);
576: if (($token->[0] eq 'S') && ($target eq 'modified')) {
577: $deleted=&Apache::edit::handle_delete($space,$target,$token,$tagstack,
578: $parstack,$parser,$safeeval,
579: $style);
580: }
581: if (!$deleted) {
582: if ($space) {
583: #&Apache::lonxml::debug("Calling sub $sub in $space $metamode");
584: $sub1="$space\:\:$sub";
585: ($currentstring,$nodefault) = &$sub1($target,$token,$tagstack,
586: $parstack,$parser,$safeeval,
587: $style);
588: } else {
589: if ($target eq 'tex') {
590: # throw away tag name
591: return '';
592: }
593: #&Apache::lonxml::debug("NOT Calling sub $sub in $space $metamode");
594: if ($metamode <1) {
595: if (defined($token->[4]) && ($metamode < 1)) {
596: $currentstring = $token->[4];
597: } else {
598: $currentstring = $token->[2];
599: }
600: }
601: }
602: # &Apache::lonxml::debug("nodefalt:$nodefault:");
603: if ($currentstring eq '' && $nodefault eq '') {
604: if ($target eq 'edit') {
605: #&Apache::lonxml::debug("doing default edit for $token->[1]");
606: if ($token->[0] eq 'S') {
607: $currentstring = &Apache::edit::tag_start($target,$token);
608: } elsif ($token->[0] eq 'E') {
609: $currentstring = &Apache::edit::tag_end($target,$token);
610: }
611: } elsif ($target eq 'modified') {
612: if ($token->[0] eq 'S') {
613: $currentstring = $token->[4];
614: $currentstring.=&Apache::edit::handle_insert();
615: } elsif ($token->[0] eq 'E') {
616: $currentstring = $token->[2];
617: $currentstring.=&Apache::edit::handle_insertafter($token->[1]);
618: } else {
619: $currentstring = $token->[2];
620: }
621: }
622: }
623: }
624: use strict 'refs';
625: }
626: return $currentstring;
627: }
628:
629: sub setup_globals {
630: my ($request,$target)=@_;
631: $Apache::lonxml::request=$request;
632: $Apache::lonxml::registered = 0;
633: @Apache::lonxml::htmlareafields=();
634: $errorcount=0;
635: $warningcount=0;
636: $Apache::lonxml::default_homework_loaded=0;
637: $Apache::lonxml::usestyle=1;
638: &init_counter();
639: @Apache::lonxml::pwd=();
640: @Apache::lonxml::extlinks=();
641: @Apache::lonxml::ssi_info=();
642: $Apache::lonxml::post_evaluate=1;
643: $Apache::lonxml::warnings_error_header='';
644: if ($target eq 'meta') {
645: $Apache::lonxml::redirection = 0;
646: $Apache::lonxml::metamode = 1;
647: $Apache::lonxml::evaluate = 1;
648: $Apache::lonxml::import = 0;
649: } elsif ($target eq 'answer') {
650: $Apache::lonxml::redirection = 0;
651: $Apache::lonxml::metamode = 1;
652: $Apache::lonxml::evaluate = 1;
653: $Apache::lonxml::import = 1;
654: } elsif ($target eq 'grade') {
655: &startredirection;
656: $Apache::lonxml::metamode = 0;
657: $Apache::lonxml::evaluate = 1;
658: $Apache::lonxml::import = 1;
659: } elsif ($target eq 'modified') {
660: $Apache::lonxml::redirection = 0;
661: $Apache::lonxml::metamode = 0;
662: $Apache::lonxml::evaluate = 0;
663: $Apache::lonxml::import = 0;
664: } elsif ($target eq 'edit') {
665: $Apache::lonxml::redirection = 0;
666: $Apache::lonxml::metamode = 0;
667: $Apache::lonxml::evaluate = 0;
668: $Apache::lonxml::import = 0;
669: } elsif ($target eq 'analyze') {
670: $Apache::lonxml::redirection = 0;
671: $Apache::lonxml::metamode = 0;
672: $Apache::lonxml::evaluate = 1;
673: $Apache::lonxml::import = 1;
674: } else {
675: $Apache::lonxml::redirection = 0;
676: $Apache::lonxml::metamode = 0;
677: $Apache::lonxml::evaluate = 1;
678: $Apache::lonxml::import = 1;
679: }
680: }
681:
682: sub init_safespace {
683: my ($target,$safeeval,$safehole,$safeinit) = @_;
684: $safeeval->permit("entereval");
685: $safeeval->permit(":base_math");
686: $safeeval->permit("sort");
687: $safeeval->permit("time");
688: $safeeval->deny(":base_io");
689: $safehole->wrap(\&Apache::scripttag::xmlparse,$safeeval,'&xmlparse');
690: $safehole->wrap(\&Apache::outputtags::multipart,$safeeval,'&multipart');
691: $safehole->wrap(\&Apache::lonnet::EXT,$safeeval,'&EXT');
692: $safehole->wrap(\&Apache::chemresponse::chem_standard_order,$safeeval,
693: '&chem_standard_order');
694:
695: $safehole->wrap(\&Math::Cephes::asin,$safeeval,'&asin');
696: $safehole->wrap(\&Math::Cephes::acos,$safeeval,'&acos');
697: $safehole->wrap(\&Math::Cephes::atan,$safeeval,'&atan');
698: $safehole->wrap(\&Math::Cephes::sinh,$safeeval,'&sinh');
699: $safehole->wrap(\&Math::Cephes::cosh,$safeeval,'&cosh');
700: $safehole->wrap(\&Math::Cephes::tanh,$safeeval,'&tanh');
701: $safehole->wrap(\&Math::Cephes::asinh,$safeeval,'&asinh');
702: $safehole->wrap(\&Math::Cephes::acosh,$safeeval,'&acosh');
703: $safehole->wrap(\&Math::Cephes::atanh,$safeeval,'&atanh');
704: $safehole->wrap(\&Math::Cephes::erf,$safeeval,'&erf');
705: $safehole->wrap(\&Math::Cephes::erfc,$safeeval,'&erfc');
706: $safehole->wrap(\&Math::Cephes::j0,$safeeval,'&j0');
707: $safehole->wrap(\&Math::Cephes::j1,$safeeval,'&j1');
708: $safehole->wrap(\&Math::Cephes::jn,$safeeval,'&jn');
709: $safehole->wrap(\&Math::Cephes::jv,$safeeval,'&jv');
710: $safehole->wrap(\&Math::Cephes::y0,$safeeval,'&y0');
711: $safehole->wrap(\&Math::Cephes::y1,$safeeval,'&y1');
712: $safehole->wrap(\&Math::Cephes::yn,$safeeval,'&yn');
713: $safehole->wrap(\&Math::Cephes::yv,$safeeval,'&yv');
714:
715: $safehole->wrap(\&Math::Cephes::bdtr ,$safeeval,'&bdtr' );
716: $safehole->wrap(\&Math::Cephes::bdtrc ,$safeeval,'&bdtrc' );
717: $safehole->wrap(\&Math::Cephes::bdtri ,$safeeval,'&bdtri' );
718: $safehole->wrap(\&Math::Cephes::btdtr ,$safeeval,'&btdtr' );
719: $safehole->wrap(\&Math::Cephes::chdtr ,$safeeval,'&chdtr' );
720: $safehole->wrap(\&Math::Cephes::chdtrc,$safeeval,'&chdtrc');
721: $safehole->wrap(\&Math::Cephes::chdtri,$safeeval,'&chdtri');
722: $safehole->wrap(\&Math::Cephes::fdtr ,$safeeval,'&fdtr' );
723: $safehole->wrap(\&Math::Cephes::fdtrc ,$safeeval,'&fdtrc' );
724: $safehole->wrap(\&Math::Cephes::fdtri ,$safeeval,'&fdtri' );
725: $safehole->wrap(\&Math::Cephes::gdtr ,$safeeval,'&gdtr' );
726: $safehole->wrap(\&Math::Cephes::gdtrc ,$safeeval,'&gdtrc' );
727: $safehole->wrap(\&Math::Cephes::nbdtr ,$safeeval,'&nbdtr' );
728: $safehole->wrap(\&Math::Cephes::nbdtrc,$safeeval,'&nbdtrc');
729: $safehole->wrap(\&Math::Cephes::nbdtri,$safeeval,'&nbdtri');
730: $safehole->wrap(\&Math::Cephes::ndtr ,$safeeval,'&ndtr' );
731: $safehole->wrap(\&Math::Cephes::ndtri ,$safeeval,'&ndtri' );
732: $safehole->wrap(\&Math::Cephes::pdtr ,$safeeval,'&pdtr' );
733: $safehole->wrap(\&Math::Cephes::pdtrc ,$safeeval,'&pdtrc' );
734: $safehole->wrap(\&Math::Cephes::pdtri ,$safeeval,'&pdtri' );
735: $safehole->wrap(\&Math::Cephes::stdtr ,$safeeval,'&stdtr' );
736: $safehole->wrap(\&Math::Cephes::stdtri,$safeeval,'&stdtri');
737:
738: # $safehole->wrap(\&Math::Cephes::new_fract,$safeeval,'&new_fract');
739: # $safehole->wrap(\&Math::Cephes::radd,$safeeval,'&radd');
740: # $safehole->wrap(\&Math::Cephes::rsub,$safeeval,'&rsub');
741: # $safehole->wrap(\&Math::Cephes::rmul,$safeeval,'&rmul');
742: # $safehole->wrap(\&Math::Cephes::rdiv,$safeeval,'&rdiv');
743: # $safehole->wrap(\&Math::Cephes::euclid,$safeeval,'&euclid');
744:
745: $safehole->wrap(\&Math::Random::random_beta,$safeeval,'&math_random_beta');
746: $safehole->wrap(\&Math::Random::random_chi_square,$safeeval,'&math_random_chi_square');
747: $safehole->wrap(\&Math::Random::random_exponential,$safeeval,'&math_random_exponential');
748: $safehole->wrap(\&Math::Random::random_f,$safeeval,'&math_random_f');
749: $safehole->wrap(\&Math::Random::random_gamma,$safeeval,'&math_random_gamma');
750: $safehole->wrap(\&Math::Random::random_multivariate_normal,$safeeval,'&math_random_multivariate_normal');
751: $safehole->wrap(\&Math::Random::random_multinomial,$safeeval,'&math_random_multinomial');
752: $safehole->wrap(\&Math::Random::random_noncentral_chi_square,$safeeval,'&math_random_noncentral_chi_square');
753: $safehole->wrap(\&Math::Random::random_noncentral_f,$safeeval,'&math_random_noncentral_f');
754: $safehole->wrap(\&Math::Random::random_normal,$safeeval,'&math_random_normal');
755: $safehole->wrap(\&Math::Random::random_permutation,$safeeval,'&math_random_permutation');
756: $safehole->wrap(\&Math::Random::random_permuted_index,$safeeval,'&math_random_permuted_index');
757: $safehole->wrap(\&Math::Random::random_uniform,$safeeval,'&math_random_uniform');
758: $safehole->wrap(\&Math::Random::random_poisson,$safeeval,'&math_random_poisson');
759: $safehole->wrap(\&Math::Random::random_uniform_integer,$safeeval,'&math_random_uniform_integer');
760: $safehole->wrap(\&Math::Random::random_negative_binomial,$safeeval,'&math_random_negative_binomial');
761: $safehole->wrap(\&Math::Random::random_binomial,$safeeval,'&math_random_binomial');
762: $safehole->wrap(\&Math::Random::random_seed_from_phrase,$safeeval,'&random_seed_from_phrase');
763: $safehole->wrap(\&Math::Random::random_set_seed_from_phrase,$safeeval,'&random_set_seed_from_phrase');
764: $safehole->wrap(\&Math::Random::random_get_seed,$safeeval,'&random_get_seed');
765: $safehole->wrap(\&Math::Random::random_set_seed,$safeeval,'&random_set_seed');
766: $safehole->wrap(\&Apache::lonxml::error,$safeeval,'&LONCAPA_INTERNAL_ERROR');
767: $safehole->wrap(\&Apache::lonxml::debug,$safeeval,'&LONCAPA_INTERNAL_DEBUG');
768: $safehole->wrap(\&Apache::caparesponse::get_sigrange,$safeeval,'&LONCAPA_INTERNAL_get_sigrange');
769:
770: #need to inspect this class of ops
771: # $safeeval->deny(":base_orig");
772: $safeeval->permit("require");
773: $safeinit .= ';$external::target="'.$target.'";';
774: my $rndseed;
775: my ($symb,$courseid,$domain,$name) = &Apache::lonxml::whichuser();
776: $rndseed=&Apache::lonnet::rndseed($symb,$courseid,$domain,$name);
777: $safeinit .= ';$external::randomseed="'.$rndseed.'";';
778: &Apache::lonxml::debug("Setting rndseed to $rndseed");
779: &Apache::run::run($safeinit,$safeeval);
780:
781: }
782:
783: sub default_homework_load {
784: my ($safeeval)=@_;
785: &Apache::lonxml::debug('Loading default_homework');
786: my $default=&Apache::lonnet::getfile('/home/httpd/html/res/adm/includes/default_homework.lcpm');
787: if ($default eq -1) {
788: &Apache::lonxml::error("<b>Unable to find <i>default_homework.lcpm</i></b>");
789: } else {
790: &Apache::run::run($default,$safeeval);
791: $Apache::lonxml::default_homework_loaded=1;
792: }
793: }
794:
795: {
796: my $alarm_depth;
797: sub init_alarm {
798: alarm(0);
799: $alarm_depth=0;
800: }
801:
802: sub start_alarm {
803: if ($alarm_depth<1) {
804: my $old=alarm($Apache::lonnet::perlvar{'lonScriptTimeout'});
805: if ($old) {
806: &Apache::lonxml::error("Cancelled an alarm of $old, this shouldn't occur.");
807: }
808: }
809: $alarm_depth++;
810: }
811:
812: sub end_alarm {
813: $alarm_depth--;
814: if ($alarm_depth<1) { alarm(0); }
815: }
816: }
817: my $metamode_was;
818: sub startredirection {
819: if (!$Apache::lonxml::redirection) {
820: $metamode_was=$Apache::lonxml::metamode;
821: }
822: $Apache::lonxml::metamode=0;
823: $Apache::lonxml::redirection++;
824: push (@Apache::lonxml::outputstack, '');
825: }
826:
827: sub endredirection {
828: if (!$Apache::lonxml::redirection) {
829: &Apache::lonxml::error("Endredirection was called, before a startredirection, perhaps you have unbalanced tags. Some debuging information:".join ":",caller);
830: return '';
831: }
832: $Apache::lonxml::redirection--;
833: if (!$Apache::lonxml::redirection) {
834: $Apache::lonxml::metamode=$metamode_was;
835: }
836: pop @Apache::lonxml::outputstack;
837: }
838:
839: sub end_tag {
840: my ($tagstack,$parstack,$token)=@_;
841: pop(@$tagstack);
842: pop(@$parstack);
843: &decreasedepth($token);
844: }
845:
846: sub initdepth {
847: @Apache::lonxml::depthcounter=();
848: $Apache::lonxml::depth=-1;
849: $Apache::lonxml::olddepth=-1;
850: }
851:
852: my @timers;
853: my $lasttime;
854: sub increasedepth {
855: my ($token) = @_;
856: $Apache::lonxml::depth++;
857: $Apache::lonxml::depthcounter[$Apache::lonxml::depth]++;
858: if ($Apache::lonxml::depthcounter[$Apache::lonxml::depth]==1) {
859: $Apache::lonxml::olddepth=$Apache::lonxml::depth;
860: }
861: my $time;
862: if ($Apache::lonxml::debug eq "1") {
863: push(@timers,[&gettimeofday()]);
864: $time=&tv_interval($lasttime);
865: $lasttime=[&gettimeofday()];
866: }
867: my $spacing=' 'x($Apache::lonxml::depth-1);
868: my $curdepth=join('_',@Apache::lonxml::depthcounter);
869: &Apache::lonxml::debug("s$spacing$Apache::lonxml::depth : $Apache::lonxml::olddepth : $curdepth : $token->[1] : $time : \n");
870: #print "<br />s $Apache::lonxml::depth : $Apache::lonxml::olddepth : $curdepth : $token->[1]\n";
871: }
872:
873: sub decreasedepth {
874: my ($token) = @_;
875: $Apache::lonxml::depth--;
876: if ($Apache::lonxml::depth<$Apache::lonxml::olddepth-1) {
877: $#Apache::lonxml::depthcounter--;
878: $Apache::lonxml::olddepth=$Apache::lonxml::depth+1;
879: }
880: if ( $Apache::lonxml::depth < -1) {
881: &Apache::lonxml::warning(&mt("Missing tags, unable to properly run file."));
882: $Apache::lonxml::depth='-1';
883: }
884: my ($timer,$time);
885: if ($Apache::lonxml::debug eq "1") {
886: $timer=pop(@timers);
887: $time=&tv_interval($lasttime);
888: $lasttime=[&gettimeofday()];
889: }
890: my $spacing=' 'x$Apache::lonxml::depth;
891: my $curdepth=join('_',@Apache::lonxml::depthcounter);
892: &Apache::lonxml::debug("e$spacing$Apache::lonxml::depth : $Apache::lonxml::olddepth : $curdepth : $token->[1] : $time : ".&tv_interval($timer)."\n");
893: #print "<br />e $Apache::lonxml::depth : $Apache::lonxml::olddepth : $token->[1] : $curdepth\n";
894: }
895:
896: sub get_all_text_unbalanced {
897: #there is a copy of this in lonpublisher.pm
898: my($tag,$pars)= @_;
899: my $token;
900: my $result='';
901: $tag='<'.$tag.'>';
902: while ($token = $$pars[-1]->get_token) {
903: if (($token->[0] eq 'T')||($token->[0] eq 'C')||($token->[0] eq 'D')) {
904: $result.=$token->[1];
905: } elsif ($token->[0] eq 'PI') {
906: $result.=$token->[2];
907: } elsif ($token->[0] eq 'S') {
908: $result.=$token->[4];
909: } elsif ($token->[0] eq 'E') {
910: $result.=$token->[2];
911: }
912: if ($result =~ /\Q$tag\E/is) {
913: ($result,my $redo)=$result =~ /(.*)\Q$tag\E(.*)/is;
914: #&Apache::lonxml::debug('Got a winner with leftovers ::'.$2);
915: #&Apache::lonxml::debug('Result is :'.$1);
916: $redo=$tag.$redo;
917: &Apache::lonxml::newparser($pars,\$redo);
918: last;
919: }
920: }
921: return $result
922: }
923:
924: sub increment_counter {
925: my ($increment) = @_;
926: if (defined($increment) && $increment gt 0) {
927: $Apache::lonxml::counter+=$increment;
928: } else {
929: $Apache::lonxml::counter++;
930: }
931: $Apache::lonxml::counter_changed=1;
932: }
933:
934: sub init_counter {
935: if (defined($ENV{'form.counter'})) {
936: $Apache::lonxml::counter=$ENV{'form.counter'};
937: $Apache::lonxml::counter_changed=0;
938: } else {
939: $Apache::lonxml::counter=1;
940: $Apache::lonxml::counter_changed=1;
941: }
942: }
943:
944: sub store_counter {
945: &Apache::lonnet::appenv(('form.counter' => $Apache::lonxml::counter));
946: return '';
947: }
948:
949: sub get_all_text {
950: my($tag,$pars,$style)= @_;
951: my $gotfullstack=1;
952: if (ref($pars) ne 'ARRAY') {
953: $gotfullstack=0;
954: $pars=[$pars];
955: }
956: if (ref($style) ne 'HASH') {
957: $style={};
958: }
959: my $depth=0;
960: my $token;
961: my $result='';
962: if ( $tag =~ m:^/: ) {
963: my $tag=substr($tag,1);
964: #&Apache::lonxml::debug("have:$tag:");
965: my $top_empty=0;
966: while (($depth >=0) && ($#$pars > -1) && (!$top_empty)) {
967: while (($depth >=0) && ($token = $$pars[-1]->get_token)) {
968: #&Apache::lonxml::debug("e token:$token->[0]:$depth:$token->[1]:".$#$pars.":".$#Apache::lonxml::pwd);
969: if (($token->[0] eq 'T')||($token->[0] eq 'C')||($token->[0] eq 'D')) {
970: $result.=$token->[1];
971: } elsif ($token->[0] eq 'PI') {
972: $result.=$token->[2];
973: } elsif ($token->[0] eq 'S') {
974: if ($token->[1] =~ /^\Q$tag\E$/i) { $depth++; }
975: if ($token->[1] =~ /^LONCAPA_INTERNAL_TURN_STYLE_ON$/) { $Apache::lonxml::usestyle=1; }
976: if ($token->[1] =~ /^LONCAPA_INTERNAL_TURN_STYLE_OFF$/) { $Apache::lonxml::usestyle=0; }
977: $result.=$token->[4];
978: } elsif ($token->[0] eq 'E') {
979: if ( $token->[1] =~ /^\Q$tag\E$/i) { $depth--; }
980: #skip sending back the last end tag
981: if ($depth == 0 && exists($$style{'/'.$token->[1]}) && $Apache::lonxml::usestyle) {
982: my $string=
983: '<LONCAPA_INTERNAL_TURN_STYLE_OFF end="yes" />'.
984: $$style{'/'.$token->[1]}.
985: $token->[2].
986: '<LONCAPA_INTERNAL_TURN_STYLE_ON />';
987: &Apache::lonxml::newparser($pars,\$string);
988: #&Apache::lonxml::debug("reParsing $string");
989: next;
990: }
991: if ($depth > -1) {
992: $result.=$token->[2];
993: } else {
994: $$pars[-1]->unget_token($token);
995: }
996: }
997: }
998: if (($depth >=0) && ($#$pars == 0) ) { $top_empty=1; }
999: if (($depth >=0) && ($#$pars > 0) ) {
1000: pop(@$pars);
1001: pop(@Apache::lonxml::pwd);
1002: }
1003: }
1004: if ($top_empty && $depth >= 0) {
1005: #never found the end tag ran out of text, throw error send back blank
1006: &error('Never found end tag for <'.$tag.
1007: '> current string <pre>'.
1008: &HTML::Entities::encode($result,'<>&"').
1009: '</pre>');
1010: if ($gotfullstack) {
1011: my $newstring='</'.$tag.'>'.$result;
1012: &Apache::lonxml::newparser($pars,\$newstring);
1013: }
1014: $result='';
1015: }
1016: } else {
1017: while ($#$pars > -1) {
1018: while ($token = $$pars[-1]->get_token) {
1019: #&Apache::lonxml::debug("s token:$token->[0]:$depth:$token->[1]");
1020: if (($token->[0] eq 'T')||($token->[0] eq 'C')||
1021: ($token->[0] eq 'D')) {
1022: $result.=$token->[1];
1023: } elsif ($token->[0] eq 'PI') {
1024: $result.=$token->[2];
1025: } elsif ($token->[0] eq 'S') {
1026: if ( $token->[1] =~ /^\Q$tag\E$/i) {
1027: $$pars[-1]->unget_token($token); last;
1028: } else {
1029: $result.=$token->[4];
1030: }
1031: if ($token->[1] =~ /^LONCAPA_INTERNAL_TURN_STYLE_ON$/) { $Apache::lonxml::usestyle=1; }
1032: if ($token->[1] =~ /^LONCAPA_INTERNAL_TURN_STYLE_OFF$/) { $Apache::lonxml::usestyle=0; }
1033: } elsif ($token->[0] eq 'E') {
1034: $result.=$token->[2];
1035: }
1036: }
1037: if (($#$pars > 0) ) {
1038: pop(@$pars);
1039: pop(@Apache::lonxml::pwd);
1040: } else { last; }
1041: }
1042: }
1043: #&Apache::lonxml::debug("Exit:$result:");
1044: return $result
1045: }
1046:
1047: sub newparser {
1048: my ($parser,$contentref,$dir) = @_;
1049: push (@$parser,HTML::LCParser->new($contentref));
1050: $$parser['-1']->xml_mode('1');
1051: if ( $dir eq '' ) {
1052: push (@Apache::lonxml::pwd, $Apache::lonxml::pwd[$#Apache::lonxml::pwd]);
1053: } else {
1054: push (@Apache::lonxml::pwd, $dir);
1055: }
1056: }
1057:
1058: sub parstring {
1059: my ($token) = @_;
1060: my $temp='';
1061: foreach (@{$token->[3]}) {
1062: unless ($_=~/\W/) {
1063: my $val=$token->[2]->{$_};
1064: $val =~ s/([\%\@\\\"\'])/\\$1/g;
1065: $val =~ s/(\$[^{a-zA-Z_])/\\$1/g;
1066: $val =~ s/(\$)$/\\$1/;
1067: #if ($val =~ m/^[\%\@]/) { $val="\\".$val; }
1068: $temp .= "my \$$_=\"$val\";";
1069: }
1070: }
1071: return $temp;
1072: }
1073:
1074: sub writeallows {
1075: unless ($#extlinks>=0) { return; }
1076: my $thisurl='/res/'.&Apache::lonnet::declutter(shift);
1077: if ($ENV{'httpref.'.$thisurl}) {
1078: $thisurl=$ENV{'httpref.'.$thisurl};
1079: }
1080: my $thisdir=$thisurl;
1081: $thisdir=~s/\/[^\/]+$//;
1082: my %httpref=();
1083: foreach (@extlinks) {
1084: $httpref{'httpref.'.
1085: &Apache::lonnet::hreflocation($thisdir,$_)}=$thisurl;
1086: }
1087: @extlinks=();
1088: &Apache::lonnet::appenv(%httpref);
1089: }
1090:
1091: sub register_ssi {
1092: my ($url,%form)=@_;
1093: push (@Apache::lonxml::ssi_info,{'url'=>$url,'form'=>\%form});
1094: return '';
1095: }
1096:
1097: sub do_registered_ssi {
1098: foreach my $info (@Apache::lonxml::ssi_info) {
1099: my %form=%{ $info->{'form'}};
1100: my $url=$info->{'url'};
1101: &Apache::lonnet::ssi($url,%form);
1102: }
1103: }
1104: #
1105: # Afterburner handles anchors, highlights and links
1106: #
1107: sub afterburn {
1108: my $result=shift;
1109: &Apache::loncommon::get_unprocessed_cgi($ENV{'QUERY_STRING'},
1110: ['highlight','anchor','link']);
1111: if ($ENV{'form.highlight'}) {
1112: foreach (split(/\,/,$ENV{'form.highlight'})) {
1113: my $anchorname=$_;
1114: my $matchthis=$anchorname;
1115: $matchthis=~s/\_+/\\s\+/g;
1116: $result=~s/(\Q$matchthis\E)/\<font color=\"red\"\>$1\<\/font\>/gs;
1117: }
1118: }
1119: if ($ENV{'form.link'}) {
1120: foreach (split(/\,/,$ENV{'form.link'})) {
1121: my ($anchorname,$linkurl)=split(/\>/,$_);
1122: my $matchthis=$anchorname;
1123: $matchthis=~s/\_+/\\s\+/g;
1124: $result=~s/(\Q$matchthis\E)/\<a href=\"$linkurl\"\>$1\<\/a\>/gs;
1125: }
1126: }
1127: if ($ENV{'form.anchor'}) {
1128: my $anchorname=$ENV{'form.anchor'};
1129: my $matchthis=$anchorname;
1130: $matchthis=~s/\_+/\\s\+/g;
1131: $result=~s/(\Q$matchthis\E)/\<a name=\"$anchorname\"\>$1\<\/a\>/s;
1132: $result.=(<<"ENDSCRIPT");
1133: <script type="text/javascript">
1134: document.location.hash='$anchorname';
1135: </script>
1136: ENDSCRIPT
1137: }
1138: return $result;
1139: }
1140:
1141: sub storefile {
1142: my ($file,$contents)=@_;
1143: &Apache::lonnet::correct_line_ends(\$contents);
1144: if (my $fh=Apache::File->new('>'.$file)) {
1145: print $fh $contents;
1146: $fh->close();
1147: return 1;
1148: } else {
1149: &warning("Unable to save file $file");
1150: return 0;
1151: }
1152: }
1153:
1154: sub createnewhtml {
1155: my $title=&mt('Title of document goes here');
1156: my $body=&mt('Body of document goes here');
1157: my $filecontents=(<<SIMPLECONTENT);
1158: <!DOCTYPE html PUBLIC "-//W3C//DTD XHTML 1.1//EN" "http://www.w3.org/TR/xhtml/11/DTD/xhtml11.dtd">
1159: <html>
1160: <head>
1161: <title>$title</title>
1162: </head>
1163: <body bgcolor="#FFFFFF">
1164: $body
1165: </body>
1166: </html>
1167: SIMPLECONTENT
1168: return $filecontents;
1169: }
1170:
1171: sub createnewsty {
1172: my $filecontents=(<<SIMPLECONTENT);
1173: <definetag name="">
1174: <render>
1175: <web></web>
1176: <tex></tex>
1177: </render>
1178: </definetag>
1179: SIMPLECONTENT
1180: return $filecontents;
1181: }
1182:
1183:
1184: sub inserteditinfo {
1185: my ($result,$filecontents,$filetype)=@_;
1186: $filecontents = &HTML::Entities::encode($filecontents,'<>&"');
1187: # my $editheader='<a href="#editsection">Edit below</a><hr />';
1188: my $xml_help = '';
1189: my $initialize='';
1190: if ($filetype eq 'html') {
1191: my $addbuttons=&Apache::lonhtmlcommon::htmlareaaddbuttons();
1192: $initialize=&Apache::lonhtmlcommon::htmlareaheaders().
1193: &Apache::lonhtmlcommon::spellheader();
1194: if (!&Apache::lonhtmlcommon::htmlareablocked() &&
1195: &Apache::lonhtmlcommon::htmlareabrowser()) {
1196: $initialize.=(<<FULLPAGE);
1197: <script type="text/javascript">
1198: $addbuttons
1199:
1200: HTMLArea.loadPlugin("FullPage");
1201:
1202: function initDocument() {
1203: var editor=new HTMLArea("filecont",config);
1204: editor.registerPlugin(FullPage);
1205: editor.generate();
1206: }
1207: </script>
1208: FULLPAGE
1209: } else {
1210: $initialize.=(<<FULLPAGE);
1211: <script type="text/javascript">
1212: $addbuttons
1213: function initDocument() {
1214: }
1215: </script>
1216: FULLPAGE
1217: }
1218: $result=~s/\<body([^\>]*)\>/\<body onload="initDocument()" $1\>/i;
1219: $xml_help=&Apache::loncommon::helpLatexCheatsheet();
1220: }
1221: my $cleanbut = '';
1222: if ($filetype eq 'html') {
1223: $cleanbut='<input type="submit" name="attemptclean" value="'.
1224: &mt('Save and then attempt to clean HTML').'" />';
1225: }
1226: my $titledisplay=&display_title();
1227: my %lt=&Apache::lonlocal::texthash('st' => 'Save this',
1228: 'vi' => 'View',
1229: 'ed' => 'Edit');
1230: my $buttons=(<<BUTTONS);
1231: $cleanbut
1232: <input type="submit" name="savethisfile" accesskey="s" value="$lt{'st'}" />
1233: <input type="submit" name="viewmode" accesskey="v" value="$lt{'vi'}" />
1234: BUTTONS
1235: $buttons.=&Apache::lonhtmlcommon::spelllink('xmledit','filecont');
1236: $buttons.=&Apache::lonhtmlcommon::htmlareaselectactive('filecont');
1237: my $editfooter=(<<ENDFOOTER);
1238: $initialize
1239: <hr />
1240: <a name="editsection" />
1241: <form method="post" name="xmledit">
1242: $xml_help
1243: <input type="hidden" name="editmode" value="$lt{'ed'}" />
1244: $buttons<br />
1245: <textarea cols="80" rows="44" name="filecont" id="filecont">$filecontents</textarea>
1246: <br />$buttons
1247: <br />
1248: </form>
1249: $titledisplay
1250: </body>
1251: ENDFOOTER
1252: # $result=~s/(\<body[^\>]*\>)/$1$editheader/is;
1253: $result=~s/(\<\/body\>)/$editfooter/is;
1254: return $result;
1255: }
1256:
1257: sub get_target {
1258: my $viewgrades=&Apache::lonnet::allowed('vgr',$ENV{'request.course.id'});
1259: if ( $ENV{'request.state'} eq 'published') {
1260: if ( defined($ENV{'form.grade_target'})
1261: && ($viewgrades == 'F' )) {
1262: return ($ENV{'form.grade_target'});
1263: } elsif (defined($ENV{'form.grade_target'})) {
1264: if (($ENV{'form.grade_target'} eq 'web') ||
1265: ($ENV{'form.grade_target'} eq 'tex') ) {
1266: return $ENV{'form.grade_target'}
1267: } else {
1268: return 'web';
1269: }
1270: } else {
1271: return 'web';
1272: }
1273: } elsif ($ENV{'request.state'} eq 'construct') {
1274: if ( defined($ENV{'form.grade_target'})) {
1275: return ($ENV{'form.grade_target'});
1276: } else {
1277: return 'web';
1278: }
1279: } else {
1280: return 'web';
1281: }
1282: }
1283:
1284: sub handler {
1285: my $request=shift;
1286:
1287: my $target=&get_target();
1288:
1289: $Apache::lonxml::debug=$ENV{'user.debug'};
1290:
1291: if ($ENV{'browser.mathml'}) {
1292: &Apache::loncommon::content_type($request,'text/xml');
1293: } else {
1294: &Apache::loncommon::content_type($request,'text/html');
1295: }
1296: &Apache::loncommon::no_cache($request);
1297: $request->set_last_modified(&Apache::lonnet::metadata($request->uri,
1298: 'lastrevisiondate'));
1299: $request->send_http_header;
1300:
1301: return OK if $request->header_only;
1302:
1303:
1304: my $file=&Apache::lonnet::filelocation("",$request->uri);
1305: my $filetype;
1306: if ($file =~ /\.sty$/) {
1307: $filetype='sty';
1308: } else {
1309: $filetype='html';
1310: }
1311: #
1312: # Edit action? Save file.
1313: #
1314: unless ($ENV{'request.state'} eq 'published') {
1315: if (($ENV{'form.savethisfile'}) || ($ENV{'form.attemptclean'})) {
1316: if (&storefile($file,$ENV{'form.filecont'})) {
1317: &Apache::lonxml::info("<font COLOR=\"#0000FF\">".
1318: &mt('Updated').": ".
1319: &Apache::lonlocal::locallocaltime(time).
1320: " </font>");
1321: }
1322: }
1323: }
1324: my %mystyle;
1325: my $result = '';
1326: my $filecontents=&Apache::lonnet::getfile($file);
1327: if ($filecontents eq -1) {
1328: my $bodytag=&Apache::loncommon::bodytag('File Error');
1329: my $fnf=&mt('File not found');
1330: $result=(<<ENDNOTFOUND);
1331: <html>
1332: <head>
1333: <title>$fnf</title>
1334: </head>
1335: $bodytag
1336: <b>$fnf: $file</b>
1337: </body>
1338: </html>
1339: ENDNOTFOUND
1340: $filecontents='';
1341: if ($ENV{'request.state'} ne 'published') {
1342: if ($filetype eq 'sty') {
1343: $filecontents=&createnewsty();
1344: } else {
1345: $filecontents=&createnewhtml();
1346: }
1347: $ENV{'form.editmode'}='Edit'; #force edit mode
1348: }
1349: } else {
1350: unless ($ENV{'request.state'} eq 'published') {
1351: if ($filecontents=~/BEGIN LON-CAPA Internal/) {
1352: &Apache::lonxml::error(&mt('This file appears to be a rendering of a Lon-CAPA resource. If this is correct, this resource will act very oddly and incorrectly.'));
1353: }
1354:
1355: if ($ENV{'form.attemptclean'}) {
1356: $filecontents=&htmlclean($filecontents,1);
1357: }
1358: #
1359: # we are in construction space, see if edit mode forced
1360: &Apache::loncommon::get_unprocessed_cgi
1361: ($ENV{'QUERY_STRING'},['editmode']);
1362: }
1363: if (!$ENV{'form.editmode'} || $ENV{'form.viewmode'}) {
1364: $result = &Apache::lonxml::xmlparse($request,$target,$filecontents,
1365: '',%mystyle);
1366: }
1367: }
1368:
1369: #
1370: # Edit action? Insert editing commands
1371: #
1372: unless ($ENV{'request.state'} eq 'published') {
1373: if ($ENV{'form.editmode'} && (!($ENV{'form.viewmode'}))) {
1374: my $displayfile=$request->uri;
1375: $displayfile=~s/^\/[^\/]*//;
1376: my $bodytag='<body bgcolor="#FFFFFF">';
1377: if ($ENV{'environment.remote'} eq 'off') {
1378: $bodytag=&Apache::loncommon::bodytag();
1379: }
1380: $result='<html>'.$bodytag.
1381: &Apache::lonxml::message_location().'<h3>'.
1382: $displayfile.
1383: '</h3></body></html>';
1384: $result=&inserteditinfo($result,$filecontents,$filetype);
1385: }
1386: }
1387: if ($filetype eq 'html') { writeallows($request->uri); }
1388:
1389:
1390: &Apache::lonxml::add_messages(\$result);
1391: $request->print($result);
1392:
1393: return OK;
1394: }
1395:
1396: sub display_title {
1397: my $result;
1398: if ($ENV{'request.state'} eq 'construct') {
1399: my $title=&Apache::lonnet::gettitle();
1400: if (!defined($title) || $title eq '') {
1401: $title = $ENV{'request.filename'};
1402: $title = substr($title, rindex($title, '/') + 1);
1403: }
1404: $result = "<script type='text/javascript'>top.document.title = '$title - LON-CAPA Construction Space';</script>";
1405: }
1406: return $result;
1407: }
1408:
1409: sub debug {
1410: if ($Apache::lonxml::debug eq "1") {
1411: $|=1;
1412: my $request=$Apache::lonxml::request;
1413: if (!$request) { $request=Apache->request; }
1414: $request->print('<font size="-2"><pre>DEBUG:'.&HTML::Entities::encode($_[0],'<>&"')."</pre></font>\n");
1415: #&Apache::lonnet::logthis($_[0]);
1416: }
1417: }
1418:
1419: sub show_error_warn_msg {
1420: if ($ENV{'request.filename'} eq '/home/httpd/html/res/lib/templates/simpleproblem.problem' &&
1421: &Apache::lonnet::allowed('mdc',$ENV{'request.course.id'})) {
1422: return 1;
1423: }
1424: return (($Apache::lonxml::debug eq 1) ||
1425: ($ENV{'request.state'} eq 'construct') ||
1426: ($Apache::lonhomework::browse eq 'F'
1427: &&
1428: $ENV{'form.show_errors'} eq 'on'));
1429: }
1430:
1431: sub error {
1432: $errorcount++;
1433: if ( &show_error_warn_msg() ) {
1434: # If printing in construction space, put the error inside <pre></pre>
1435: push(@Apache::lonxml::error_messages,
1436: $Apache::lonxml::warnings_error_header.
1437: "<b>ERROR:</b>".join("<br />\n",@_)."<br />\n");
1438: $Apache::lonxml::warnings_error_header='';
1439: } else {
1440: my $errormsg;
1441: my ($symb)=&Apache::lonnet::symbread();
1442: if ( !$symb ) {
1443: #public or browsers
1444: $errormsg=&mt("An error occured while processing this resource. The author has been notified.");
1445: }
1446: #notify author
1447: &Apache::lonmsg::author_res_msg($ENV{'request.filename'},join('<br />',@_));
1448: #notify course
1449: if ( $symb && $ENV{'request.course.id'} ) {
1450: my (undef,%users)=&Apache::lonfeedback::decide_receiver(undef,0,1,1,1);
1451: my $declutter=&Apache::lonnet::declutter($ENV{'request.filename'});
1452: my @userlist;
1453: foreach (keys %users) {
1454: my ($user,$domain) = split(/:/, $_);
1455: push(@userlist,"$user\@$domain");
1456: &Apache::lonmsg::user_normal_msg($user,$domain,
1457: "Error [$declutter]",join('<br />',@_));
1458: }
1459: if ($ENV{'request.role.adv'}) {
1460: $errormsg=&mt("An error occured while processing this resource. The course personnel ([_1]) and the author have been notified.",join(', ',@userlist));
1461: } else {
1462: $errormsg=&mt("An error occured while processing this resource. The instructor has been notified.");
1463: }
1464: }
1465: push(@Apache::lonxml::error_messages,"<b>$errormsg</b> <br />");
1466: }
1467: }
1468:
1469: sub warning {
1470: $warningcount++;
1471:
1472: if ($ENV{'form.grade_target'} ne 'tex') {
1473: if ( &show_error_warn_msg() ) {
1474: my $request=$Apache::lonxml::request;
1475: if (!$request) { $request=Apache->request; }
1476: push(@Apache::lonxml::warning_messages,
1477: $Apache::lonxml::warnings_error_header.
1478: "<b>W</b>ARNING<b>:</b>".join('<br />',@_)."<br />\n");
1479: $Apache::lonxml::warnings_error_header='';
1480: }
1481: }
1482: }
1483:
1484: sub info {
1485: if ($ENV{'form.grade_target'} ne 'tex'
1486: && $ENV{'request.state'} eq 'construct') {
1487: push(@Apache::lonxml::info_messages,join('<br />',@_)."<br />\n");
1488: }
1489: }
1490:
1491: sub message_location {
1492: return '__LONCAPA_INTERNAL_MESSAGE_LOCATION__';
1493: }
1494:
1495: sub add_messages {
1496: my ($msg)=@_;
1497: my $result=join(' ',
1498: @Apache::lonxml::info_messages,
1499: @Apache::lonxml::error_messages,
1500: @Apache::lonxml::warning_messages);
1501: undef(@Apache::lonxml::info_messages);
1502: undef(@Apache::lonxml::error_messages);
1503: undef(@Apache::lonxml::warning_messages);
1504: $$msg=~s/__LONCAPA_INTERNAL_MESSAGE_LOCATION__/$result/;
1505: $$msg=~s/__LONCAPA_INTERNAL_MESSAGE_LOCATION__//g;
1506: }
1507:
1508: sub get_param {
1509: my ($param,$parstack,$safeeval,$context,$case_insensitive) = @_;
1510: if ( ! $context ) { $context = -1; }
1511: my $args ='';
1512: if ( $#$parstack > (-2-$context) ) { $args=$$parstack[$context]; }
1513: if ( ! $Apache::lonxml::usestyle ) {
1514: $args=$Apache::lonxml::style_values.$args;
1515: }
1516: if ( ! $args ) { return undef; }
1517: if ( $case_insensitive ) {
1518: if ($args =~ s/(my \$)(\Q$param\E)(=\")/$1.lc($2).$3/ei) {
1519: return &Apache::run::run("{$args;".'return $'.$param.'}',
1520: $safeeval); #'
1521: } else {
1522: return undef;
1523: }
1524: } else {
1525: if ( $args =~ /my \$\Q$param\E=\"/ ) {
1526: return &Apache::run::run("{$args;".'return $'.$param.'}',
1527: $safeeval); #'
1528: } else {
1529: return undef;
1530: }
1531: }
1532: }
1533:
1534: sub get_param_var {
1535: my ($param,$parstack,$safeeval,$context,$case_insensitive) = @_;
1536: if ( ! $context ) { $context = -1; }
1537: my $args ='';
1538: if ( $#$parstack > (-2-$context) ) { $args=$$parstack[$context]; }
1539: if ( ! $Apache::lonxml::usestyle ) {
1540: $args=$Apache::lonxml::style_values.$args;
1541: }
1542: &Apache::lonxml::debug("Args are $args param is $param");
1543: if ($case_insensitive) {
1544: if (! ($args=~s/(my \$)(\Q$param\E)(=\")/$1.lc($2).$3/ei)) {
1545: return undef;
1546: }
1547: } elsif ( $args !~ /my \$\Q$param\E=\"/ ) { return undef; }
1548: my $value=&Apache::run::run("{$args;".'return $'.$param.'}',$safeeval); #'
1549: &Apache::lonxml::debug("first run is $value");
1550: if ($value =~ /^[\$\@\%][a-zA-Z_]\w*$/) {
1551: &Apache::lonxml::debug("doing second");
1552: my @result=&Apache::run::run("return $value",$safeeval,1);
1553: if (!defined($result[0])) {
1554: return $value
1555: } else {
1556: if (wantarray) { return @result; } else { return $result[0]; }
1557: }
1558: } else {
1559: return $value;
1560: }
1561: }
1562:
1563: sub register_insert {
1564: my @data = split /\n/, &Apache::lonnet::getfile('/home/httpd/lonTabs/insertlist.tab');
1565: my $i;
1566: my $tagnum=0;
1567: my @order;
1568: for ($i=0;$i < $#data; $i++) {
1569: my $line = $data[$i];
1570: if ( $line =~ /^\#/ || $line =~ /^\s*\n/) { next; }
1571: if ( $line =~ /TABLE/ ) { last; }
1572: my ($tag,$descrip,$color,$function,$show,$helpfile,$helpdesc) = split(/,/, $line);
1573: if ($tag) {
1574: $insertlist{"$tagnum.tag"} = $tag;
1575: $insertlist{"$tagnum.description"} = $descrip;
1576: $insertlist{"$tagnum.color"} = $color;
1577: $insertlist{"$tagnum.function"} = $function;
1578: if (!defined($show)) { $show='yes'; }
1579: $insertlist{"$tagnum.show"}= $show;
1580: $insertlist{"$tagnum.helpfile"} = $helpfile;
1581: $insertlist{"$tagnum.helpdesc"} = $helpdesc;
1582: $insertlist{"$tag.num"}=$tagnum;
1583: $tagnum++;
1584: }
1585: }
1586: $i++; #skipping TABLE line
1587: $tagnum = 0;
1588: for (;$i < $#data;$i++) {
1589: my $line = $data[$i];
1590: my ($mnemonic,@which) = split(/ +/,$line);
1591: my $tag = $insertlist{"$tagnum.tag"};
1592: for (my $j=0;$j <=$#which;$j++) {
1593: if ( $which[$j] eq 'Y' ) {
1594: if ($insertlist{"$j.show"} ne 'no') {
1595: push(@{ $insertlist{"$tag.which"} },$j);
1596: }
1597: }
1598: }
1599: $tagnum++;
1600: }
1601: }
1602:
1603: sub description {
1604: my ($token)=@_;
1605: my $tagnum;
1606: my $tag=$token->[1];
1607: foreach my $namespace (reverse @Apache::lonxml::namespace) {
1608: my $testtag=$namespace.'::'.$tag;
1609: $tagnum=$insertlist{"$testtag.num"};
1610: if (defined($tagnum)) { last; }
1611: }
1612: if (!defined ($tagnum)) { $tagnum=$Apache::lonxml::insertlist{"$tag.num"}; }
1613: return $insertlist{$tagnum.'.description'};
1614: }
1615:
1616: # Returns a list containing the help file, and the description
1617: sub helpinfo {
1618: my ($token)=@_;
1619: my $tagnum;
1620: my $tag=$token->[1];
1621: foreach my $namespace (reverse @Apache::lonxml::namespace) {
1622: my $testtag=$namespace.'::'.$tag;
1623: $tagnum=$insertlist{"$testtag.num"};
1624: if (defined($tagnum)) { last; }
1625: }
1626: if (!defined ($tagnum)) { $tagnum=$Apache::lonxml::insertlist{"$tag.num"}; }
1627: return ($insertlist{$tagnum.'.helpfile'}, $insertlist{$tagnum.'.helpdesc'});
1628: }
1629:
1630: # ----------------------------------------------------------------- whichuser
1631: # returns a list of $symb, $courseid, $domain, $name that is correct for
1632: # calls to lonnet functions for this setup.
1633: # - looks for form.grade_ parameters
1634: sub whichuser {
1635: my ($passedsymb)=@_;
1636: my ($symb,$courseid,$domain,$name,$publicuser);
1637: if (defined($ENV{'form.grade_symb'})) {
1638: my ($tmp_courseid)=
1639: &Apache::loncommon::get_env_multiple('form.grade_courseid');
1640: my $allowed=&Apache::lonnet::allowed('vgr',$tmp_courseid);
1641: if (!$allowed &&
1642: exists($ENV{'request.course.sec'}) &&
1643: $ENV{'request.course.sec'} !~ /^\s*$/) {
1644: $allowed=&Apache::lonnet::allowed('vgr',$tmp_courseid.
1645: '/'.$ENV{'request.course.sec'});
1646: }
1647: if ($allowed) {
1648: ($symb)=&Apache::loncommon::get_env_multiple('form.grade_symb');
1649: $courseid=$tmp_courseid;
1650: ($domain)=&Apache::loncommon::get_env_multiple('form.grade_domain');
1651: ($name)=&Apache::loncommon::get_env_multiple('form.grade_username');
1652: return ($symb,$courseid,$domain,$name,$publicuser);
1653: }
1654: }
1655: if (!$passedsymb) {
1656: $symb=&Apache::lonnet::symbread();
1657: } else {
1658: $symb=$passedsymb;
1659: }
1660: $courseid=$ENV{'request.course.id'};
1661: $domain=$ENV{'user.domain'};
1662: $name=$ENV{'user.name'};
1663: if ($name eq 'public' && $domain eq 'public') {
1664: if (!defined($ENV{'form.username'})) {
1665: $ENV{'form.username'}.=time.rand(10000000);
1666: }
1667: $name.=$ENV{'form.username'};
1668: }
1669: return ($symb,$courseid,$domain,$name,$publicuser);
1670: }
1671:
1672: 1;
1673: __END__
1674:
1675:
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