1: # The LearningOnline Network with CAPA
2: # XML Parser Module
3: #
4: # $Id: lonxml.pm,v 1.361 2005/03/10 02:34:59 www 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.&Apache::loncommon::endbodytag();
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: if ($ENV{'form.return_only_error_and_warning_counts'}) {
372: return "$errorcount:$warningcount";
373: }
374: return $finaloutput;
375: }
376:
377: sub htmlclean {
378: my ($raw,$full)=@_;
379: # Take care of CRLF etc
380:
381: $raw=~s/\r\f/\n/gs; $raw=~s/\f\r/\n/gs;
382: $raw=~s/\r\n/\n/gs; $raw=~s/\n\r/\n/gs;
383: $raw=~s/\f/\n/gs; $raw=~s/\r/\n/gs;
384: $raw=~s/\&\#10\;/\n/gs; $raw=~s/\&\#13\;/\n/gs;
385:
386: # Generate empty tags, remove wrong end tags
387: $raw=~s/\<(br|hr|img|meta|allow|basefont)([^\>\/]*?)\>/\<$1$2 \/\>/gis;
388: $raw=~s/\<\/(br|hr|img|meta|allow|basefont)\>//gis;
389: unless ($full) {
390: $raw=~s/\<[\/]*(body|head|html)\>//gis;
391: }
392: # Make standard tags lowercase
393: foreach ('html','body','head','meta','h1','h2','h3','h4','b','i','m',
394: 'table','tr','td','th','p','br','hr','img','embed','font',
395: 'a','strong','center','title','basefont','li','ol','ul',
396: 'input','select','form','option','script','pre') {
397: $raw=~s/\<$_\s*\>/\<$_\>/gis;
398: $raw=~s/\<\/$_\s*\>/<\/$_\>/gis;
399: $raw=~s/\<$_\s([^\>]*)\>/<$_ $1\>/gis;
400: }
401: return $raw;
402: }
403:
404: sub latex_special_symbols {
405: my ($string,$where)=@_;
406: if ($where eq 'header') {
407: $string =~ s/(\\|_|\^)/ /g;
408: $string =~ s/(\$|%|\{|\})/\\$1/g;
409: $string =~ s/_/ /g;
410: $string=&Apache::lonprintout::character_chart($string);
411: # any & or # leftover should be safe to just escape
412: $string=~s/([^\\])\&/$1\\\&/g;
413: $string=~s/([^\\])\#/$1\\\#/g;
414: } else {
415: $string=~s/\\/\\ensuremath{\\backslash}/g;
416: $string=~s/([^\\]|^)\%/$1\\\%/g;
417: $string=~s/([^\\]|^)\$/$1\\\$/g;
418: $string=~s/([^\\])\_/$1\\_/g;
419: $string=~s/\$\$/\$\\\$/g;
420: $string=~s/\_\_/\_\\\_/g;
421: $string=~s/\#\#/\#\\\#/g;
422: $string=~s/([^\\]|^)(\~|\^)/$1\\$2\\strut /g;
423: $string=~s/(>|<)/\\ensuremath\{$1\}/g; #more or less
424: $string=&Apache::lonprintout::character_chart($string);
425: # any & or # leftover should be safe to just escape
426: $string=~s/([^\\]|^)\&/$1\\\&/g;
427: $string=~s/([^\\]|^)\#/$1\\\#/g;
428: $string=~s/\|/\$\\mid\$/g;
429: #single { or } How to escape?
430: }
431: return $string;
432: }
433:
434: sub inner_xmlparse {
435: my ($target,$stack,$parstack,$pars,$safeeval,$style_for_target)=@_;
436: my $finaloutput = '';
437: my $result;
438: my $token;
439: my $dontpop=0;
440: while ( $#$pars > -1 ) {
441: while ($token = $$pars['-1']->get_token) {
442: if (($token->[0] eq 'T') || ($token->[0] eq 'C') ) {
443: if ($metamode<1) {
444: my $text=$token->[1];
445: if ($token->[0] eq 'C' && $target eq 'tex') {
446: $text = '';
447: # $text = '%'.$text."\n";
448: }
449: $result.=$text;
450: }
451: } elsif (($token->[0] eq 'D')) {
452: if ($metamode<1 && $target eq 'web') {
453: my $text=$token->[1];
454: $result.=$text;
455: }
456: } elsif ($token->[0] eq 'PI') {
457: if ($metamode<1 && $target eq 'web') {
458: $result=$token->[2];
459: }
460: } elsif ($token->[0] eq 'S') {
461: # add tag to stack
462: push (@$stack,$token->[1]);
463: # add parameters list to another stack
464: push (@$parstack,&parstring($token));
465: &increasedepth($token);
466: if ($Apache::lonxml::usestyle &&
467: exists($$style_for_target{$token->[1]})) {
468: $Apache::lonxml::usestyle=0;
469: my $string=$$style_for_target{$token->[1]}.
470: '<LONCAPA_INTERNAL_TURN_STYLE_ON />';
471: &Apache::lonxml::newparser($pars,\$string);
472: $Apache::lonxml::style_values=$$parstack[-1];
473: $Apache::lonxml::style_end_values=$$parstack[-1];
474: } else {
475: $result = &callsub("start_$token->[1]", $target, $token, $stack,
476: $parstack, $pars, $safeeval, $style_for_target);
477: }
478: } elsif ($token->[0] eq 'E') {
479: if ($Apache::lonxml::usestyle &&
480: exists($$style_for_target{'/'."$token->[1]"})) {
481: $Apache::lonxml::usestyle=0;
482: my $string=$$style_for_target{'/'.$token->[1]}.
483: '<LONCAPA_INTERNAL_TURN_STYLE_ON end="'.$token->[1].'" />';
484: &Apache::lonxml::newparser($pars,\$string);
485: $Apache::lonxml::style_values=$Apache::lonxml::style_end_values;
486: $Apache::lonxml::style_end_values='';
487: $dontpop=1;
488: } else {
489: #clear out any tags that didn't end
490: while ($token->[1] ne $$stack['-1'] && ($#$stack > -1)) {
491: my $lasttag=$$stack[-1];
492: if ($token->[1] =~ /^\Q$lasttag\E$/i) {
493: &Apache::lonxml::warning('Using tag </'.$token->[1].'> on line '.$token->[3].' as end tag to <'.$$stack[-1].'>');
494: last;
495: } else {
496: &Apache::lonxml::warning('Found tag </'.$token->[1].'> on line '.$token->[3].' when looking for </'.$$stack[-1].'> in file');
497: &end_tag($stack,$parstack,$token);
498: }
499: }
500: $result = &callsub("end_$token->[1]", $target, $token, $stack,
501: $parstack, $pars,$safeeval, $style_for_target);
502: }
503: } else {
504: &Apache::lonxml::error("Unknown token event :$token->[0]:$token->[1]:");
505: }
506: #evaluate variable refs in result
507: if ($Apache::lonxml::post_evaluate &&$result ne "") {
508: my $extras;
509: if (!$Apache::lonxml::usestyle) {
510: $extras=$Apache::lonxml::style_values;
511: }
512: if ( $#$parstack > -1 ) {
513: $result=&Apache::run::evaluate($result,$safeeval,$extras.$$parstack[-1]);
514: } else {
515: $result= &Apache::run::evaluate($result,$safeeval,$extras);
516: }
517: }
518: $Apache::lonxml::post_evaluate=1;
519:
520: if (($token->[0] eq 'T') || ($token->[0] eq 'C') || ($token->[0] eq 'D') ) {
521: #Style file definitions should be correct
522: if ($target eq 'tex' && ($Apache::lonxml::usestyle)) {
523: $result=&latex_special_symbols($result);
524: }
525: }
526:
527: if ($Apache::lonxml::redirection) {
528: $Apache::lonxml::outputstack['-1'] .= $result;
529: } else {
530: $finaloutput.=$result;
531: }
532: $result = '';
533:
534: if ($token->[0] eq 'E' && !$dontpop) {
535: &end_tag($stack,$parstack,$token);
536: }
537: $dontpop=0;
538: }
539: if ($#$pars > -1) {
540: pop @$pars;
541: pop @Apache::lonxml::pwd;
542: }
543: }
544:
545: # if ($target eq 'meta') {
546: # $finaloutput.=&endredirection;
547: # }
548:
549:
550: if (($ENV{'QUERY_STRING'}) && ($target eq 'web')) {
551: $finaloutput=&afterburn($finaloutput);
552: }
553: return $finaloutput;
554: }
555:
556: ##
557: ## Looks to see if there is a subroutine defined for this tag. If so, call it,
558: ## otherwise do not call it as we do not know what it is.
559: ##
560: sub callsub {
561: my ($sub,$target,$token,$tagstack,$parstack,$parser,$safeeval,$style)=@_;
562: my $currentstring='';
563: my $nodefault;
564: {
565: my $sub1;
566: no strict 'refs';
567: my $tag=$token->[1];
568: # get utterly rid of extended html tags
569: if ($tag=~/^x\-/i) { return ''; }
570: my $space=$Apache::lonxml::alltags{$tag}[-1];
571: if (!$space) {
572: $tag=~tr/A-Z/a-z/;
573: $sub=~tr/A-Z/a-z/;
574: $space=$Apache::lonxml::alltags{$tag}[-1]
575: }
576:
577: my $deleted=0;
578: $Apache::lonxml::curdepth=join('_',@Apache::lonxml::depthcounter);
579: if (($token->[0] eq 'S') && ($target eq 'modified')) {
580: $deleted=&Apache::edit::handle_delete($space,$target,$token,$tagstack,
581: $parstack,$parser,$safeeval,
582: $style);
583: }
584: if (!$deleted) {
585: if ($space) {
586: #&Apache::lonxml::debug("Calling sub $sub in $space $metamode");
587: $sub1="$space\:\:$sub";
588: ($currentstring,$nodefault) = &$sub1($target,$token,$tagstack,
589: $parstack,$parser,$safeeval,
590: $style);
591: } else {
592: if ($target eq 'tex') {
593: # throw away tag name
594: return '';
595: }
596: #&Apache::lonxml::debug("NOT Calling sub $sub in $space $metamode");
597: if ($metamode <1) {
598: if (defined($token->[4]) && ($metamode < 1)) {
599: $currentstring = $token->[4];
600: } else {
601: $currentstring = $token->[2];
602: }
603: }
604: }
605: # &Apache::lonxml::debug("nodefalt:$nodefault:");
606: if ($currentstring eq '' && $nodefault eq '') {
607: if ($target eq 'edit') {
608: #&Apache::lonxml::debug("doing default edit for $token->[1]");
609: if ($token->[0] eq 'S') {
610: $currentstring = &Apache::edit::tag_start($target,$token);
611: } elsif ($token->[0] eq 'E') {
612: $currentstring = &Apache::edit::tag_end($target,$token);
613: }
614: } elsif ($target eq 'modified') {
615: if ($token->[0] eq 'S') {
616: $currentstring = $token->[4];
617: $currentstring.=&Apache::edit::handle_insert();
618: } elsif ($token->[0] eq 'E') {
619: $currentstring = $token->[2];
620: $currentstring.=&Apache::edit::handle_insertafter($token->[1]);
621: } else {
622: $currentstring = $token->[2];
623: }
624: }
625: }
626: }
627: use strict 'refs';
628: }
629: return $currentstring;
630: }
631:
632: sub setup_globals {
633: my ($request,$target)=@_;
634: $Apache::lonxml::request=$request;
635: $Apache::lonxml::registered = 0;
636: @Apache::lonxml::htmlareafields=();
637: $errorcount=0;
638: $warningcount=0;
639: $Apache::lonxml::default_homework_loaded=0;
640: $Apache::lonxml::usestyle=1;
641: &init_counter();
642: @Apache::lonxml::pwd=();
643: @Apache::lonxml::extlinks=();
644: @Apache::lonxml::ssi_info=();
645: $Apache::lonxml::post_evaluate=1;
646: $Apache::lonxml::warnings_error_header='';
647: if ($target eq 'meta') {
648: $Apache::lonxml::redirection = 0;
649: $Apache::lonxml::metamode = 1;
650: $Apache::lonxml::evaluate = 1;
651: $Apache::lonxml::import = 0;
652: } elsif ($target eq 'answer') {
653: $Apache::lonxml::redirection = 0;
654: $Apache::lonxml::metamode = 1;
655: $Apache::lonxml::evaluate = 1;
656: $Apache::lonxml::import = 1;
657: } elsif ($target eq 'grade') {
658: &startredirection;
659: $Apache::lonxml::metamode = 0;
660: $Apache::lonxml::evaluate = 1;
661: $Apache::lonxml::import = 1;
662: } elsif ($target eq 'modified') {
663: $Apache::lonxml::redirection = 0;
664: $Apache::lonxml::metamode = 0;
665: $Apache::lonxml::evaluate = 0;
666: $Apache::lonxml::import = 0;
667: } elsif ($target eq 'edit') {
668: $Apache::lonxml::redirection = 0;
669: $Apache::lonxml::metamode = 0;
670: $Apache::lonxml::evaluate = 0;
671: $Apache::lonxml::import = 0;
672: } elsif ($target eq 'analyze') {
673: $Apache::lonxml::redirection = 0;
674: $Apache::lonxml::metamode = 0;
675: $Apache::lonxml::evaluate = 1;
676: $Apache::lonxml::import = 1;
677: } else {
678: $Apache::lonxml::redirection = 0;
679: $Apache::lonxml::metamode = 0;
680: $Apache::lonxml::evaluate = 1;
681: $Apache::lonxml::import = 1;
682: }
683: }
684:
685: sub init_safespace {
686: my ($target,$safeeval,$safehole,$safeinit) = @_;
687: $safeeval->permit("entereval");
688: $safeeval->permit(":base_math");
689: $safeeval->permit("sort");
690: $safeeval->permit("time");
691: $safeeval->deny(":base_io");
692: $safehole->wrap(\&Apache::scripttag::xmlparse,$safeeval,'&xmlparse');
693: $safehole->wrap(\&Apache::outputtags::multipart,$safeeval,'&multipart');
694: $safehole->wrap(\&Apache::lonnet::EXT,$safeeval,'&EXT');
695: $safehole->wrap(\&Apache::chemresponse::chem_standard_order,$safeeval,
696: '&chem_standard_order');
697:
698: $safehole->wrap(\&Math::Cephes::asin,$safeeval,'&asin');
699: $safehole->wrap(\&Math::Cephes::acos,$safeeval,'&acos');
700: $safehole->wrap(\&Math::Cephes::atan,$safeeval,'&atan');
701: $safehole->wrap(\&Math::Cephes::sinh,$safeeval,'&sinh');
702: $safehole->wrap(\&Math::Cephes::cosh,$safeeval,'&cosh');
703: $safehole->wrap(\&Math::Cephes::tanh,$safeeval,'&tanh');
704: $safehole->wrap(\&Math::Cephes::asinh,$safeeval,'&asinh');
705: $safehole->wrap(\&Math::Cephes::acosh,$safeeval,'&acosh');
706: $safehole->wrap(\&Math::Cephes::atanh,$safeeval,'&atanh');
707: $safehole->wrap(\&Math::Cephes::erf,$safeeval,'&erf');
708: $safehole->wrap(\&Math::Cephes::erfc,$safeeval,'&erfc');
709: $safehole->wrap(\&Math::Cephes::j0,$safeeval,'&j0');
710: $safehole->wrap(\&Math::Cephes::j1,$safeeval,'&j1');
711: $safehole->wrap(\&Math::Cephes::jn,$safeeval,'&jn');
712: $safehole->wrap(\&Math::Cephes::jv,$safeeval,'&jv');
713: $safehole->wrap(\&Math::Cephes::y0,$safeeval,'&y0');
714: $safehole->wrap(\&Math::Cephes::y1,$safeeval,'&y1');
715: $safehole->wrap(\&Math::Cephes::yn,$safeeval,'&yn');
716: $safehole->wrap(\&Math::Cephes::yv,$safeeval,'&yv');
717:
718: $safehole->wrap(\&Math::Cephes::bdtr ,$safeeval,'&bdtr' );
719: $safehole->wrap(\&Math::Cephes::bdtrc ,$safeeval,'&bdtrc' );
720: $safehole->wrap(\&Math::Cephes::bdtri ,$safeeval,'&bdtri' );
721: $safehole->wrap(\&Math::Cephes::btdtr ,$safeeval,'&btdtr' );
722: $safehole->wrap(\&Math::Cephes::chdtr ,$safeeval,'&chdtr' );
723: $safehole->wrap(\&Math::Cephes::chdtrc,$safeeval,'&chdtrc');
724: $safehole->wrap(\&Math::Cephes::chdtri,$safeeval,'&chdtri');
725: $safehole->wrap(\&Math::Cephes::fdtr ,$safeeval,'&fdtr' );
726: $safehole->wrap(\&Math::Cephes::fdtrc ,$safeeval,'&fdtrc' );
727: $safehole->wrap(\&Math::Cephes::fdtri ,$safeeval,'&fdtri' );
728: $safehole->wrap(\&Math::Cephes::gdtr ,$safeeval,'&gdtr' );
729: $safehole->wrap(\&Math::Cephes::gdtrc ,$safeeval,'&gdtrc' );
730: $safehole->wrap(\&Math::Cephes::nbdtr ,$safeeval,'&nbdtr' );
731: $safehole->wrap(\&Math::Cephes::nbdtrc,$safeeval,'&nbdtrc');
732: $safehole->wrap(\&Math::Cephes::nbdtri,$safeeval,'&nbdtri');
733: $safehole->wrap(\&Math::Cephes::ndtr ,$safeeval,'&ndtr' );
734: $safehole->wrap(\&Math::Cephes::ndtri ,$safeeval,'&ndtri' );
735: $safehole->wrap(\&Math::Cephes::pdtr ,$safeeval,'&pdtr' );
736: $safehole->wrap(\&Math::Cephes::pdtrc ,$safeeval,'&pdtrc' );
737: $safehole->wrap(\&Math::Cephes::pdtri ,$safeeval,'&pdtri' );
738: $safehole->wrap(\&Math::Cephes::stdtr ,$safeeval,'&stdtr' );
739: $safehole->wrap(\&Math::Cephes::stdtri,$safeeval,'&stdtri');
740:
741: # $safehole->wrap(\&Math::Cephes::new_fract,$safeeval,'&new_fract');
742: # $safehole->wrap(\&Math::Cephes::radd,$safeeval,'&radd');
743: # $safehole->wrap(\&Math::Cephes::rsub,$safeeval,'&rsub');
744: # $safehole->wrap(\&Math::Cephes::rmul,$safeeval,'&rmul');
745: # $safehole->wrap(\&Math::Cephes::rdiv,$safeeval,'&rdiv');
746: # $safehole->wrap(\&Math::Cephes::euclid,$safeeval,'&euclid');
747:
748: $safehole->wrap(\&Math::Random::random_beta,$safeeval,'&math_random_beta');
749: $safehole->wrap(\&Math::Random::random_chi_square,$safeeval,'&math_random_chi_square');
750: $safehole->wrap(\&Math::Random::random_exponential,$safeeval,'&math_random_exponential');
751: $safehole->wrap(\&Math::Random::random_f,$safeeval,'&math_random_f');
752: $safehole->wrap(\&Math::Random::random_gamma,$safeeval,'&math_random_gamma');
753: $safehole->wrap(\&Math::Random::random_multivariate_normal,$safeeval,'&math_random_multivariate_normal');
754: $safehole->wrap(\&Math::Random::random_multinomial,$safeeval,'&math_random_multinomial');
755: $safehole->wrap(\&Math::Random::random_noncentral_chi_square,$safeeval,'&math_random_noncentral_chi_square');
756: $safehole->wrap(\&Math::Random::random_noncentral_f,$safeeval,'&math_random_noncentral_f');
757: $safehole->wrap(\&Math::Random::random_normal,$safeeval,'&math_random_normal');
758: $safehole->wrap(\&Math::Random::random_permutation,$safeeval,'&math_random_permutation');
759: $safehole->wrap(\&Math::Random::random_permuted_index,$safeeval,'&math_random_permuted_index');
760: $safehole->wrap(\&Math::Random::random_uniform,$safeeval,'&math_random_uniform');
761: $safehole->wrap(\&Math::Random::random_poisson,$safeeval,'&math_random_poisson');
762: $safehole->wrap(\&Math::Random::random_uniform_integer,$safeeval,'&math_random_uniform_integer');
763: $safehole->wrap(\&Math::Random::random_negative_binomial,$safeeval,'&math_random_negative_binomial');
764: $safehole->wrap(\&Math::Random::random_binomial,$safeeval,'&math_random_binomial');
765: $safehole->wrap(\&Math::Random::random_seed_from_phrase,$safeeval,'&random_seed_from_phrase');
766: $safehole->wrap(\&Math::Random::random_set_seed_from_phrase,$safeeval,'&random_set_seed_from_phrase');
767: $safehole->wrap(\&Math::Random::random_get_seed,$safeeval,'&random_get_seed');
768: $safehole->wrap(\&Math::Random::random_set_seed,$safeeval,'&random_set_seed');
769: $safehole->wrap(\&Apache::lonxml::error,$safeeval,'&LONCAPA_INTERNAL_ERROR');
770: $safehole->wrap(\&Apache::lonxml::debug,$safeeval,'&LONCAPA_INTERNAL_DEBUG');
771: $safehole->wrap(\&Apache::caparesponse::get_sigrange,$safeeval,'&LONCAPA_INTERNAL_get_sigrange');
772:
773: #need to inspect this class of ops
774: # $safeeval->deny(":base_orig");
775: $safeeval->permit("require");
776: $safeinit .= ';$external::target="'.$target.'";';
777: my $rndseed;
778: my ($symb,$courseid,$domain,$name) = &Apache::lonxml::whichuser();
779: $rndseed=&Apache::lonnet::rndseed($symb,$courseid,$domain,$name);
780: $safeinit .= ';$external::randomseed="'.$rndseed.'";';
781: &Apache::lonxml::debug("Setting rndseed to $rndseed");
782: &Apache::run::run($safeinit,$safeeval);
783:
784: }
785:
786: sub default_homework_load {
787: my ($safeeval)=@_;
788: &Apache::lonxml::debug('Loading default_homework');
789: my $default=&Apache::lonnet::getfile('/home/httpd/html/res/adm/includes/default_homework.lcpm');
790: if ($default eq -1) {
791: &Apache::lonxml::error("<b>Unable to find <i>default_homework.lcpm</i></b>");
792: } else {
793: &Apache::run::run($default,$safeeval);
794: $Apache::lonxml::default_homework_loaded=1;
795: }
796: }
797:
798: {
799: my $alarm_depth;
800: sub init_alarm {
801: alarm(0);
802: $alarm_depth=0;
803: }
804:
805: sub start_alarm {
806: if ($alarm_depth<1) {
807: my $old=alarm($Apache::lonnet::perlvar{'lonScriptTimeout'});
808: if ($old) {
809: &Apache::lonxml::error("Cancelled an alarm of $old, this shouldn't occur.");
810: }
811: }
812: $alarm_depth++;
813: }
814:
815: sub end_alarm {
816: $alarm_depth--;
817: if ($alarm_depth<1) { alarm(0); }
818: }
819: }
820: my $metamode_was;
821: sub startredirection {
822: if (!$Apache::lonxml::redirection) {
823: $metamode_was=$Apache::lonxml::metamode;
824: }
825: $Apache::lonxml::metamode=0;
826: $Apache::lonxml::redirection++;
827: push (@Apache::lonxml::outputstack, '');
828: }
829:
830: sub endredirection {
831: if (!$Apache::lonxml::redirection) {
832: &Apache::lonxml::error("Endredirection was called, before a startredirection, perhaps you have unbalanced tags. Some debuging information:".join ":",caller);
833: return '';
834: }
835: $Apache::lonxml::redirection--;
836: if (!$Apache::lonxml::redirection) {
837: $Apache::lonxml::metamode=$metamode_was;
838: }
839: pop @Apache::lonxml::outputstack;
840: }
841:
842: sub end_tag {
843: my ($tagstack,$parstack,$token)=@_;
844: pop(@$tagstack);
845: pop(@$parstack);
846: &decreasedepth($token);
847: }
848:
849: sub initdepth {
850: @Apache::lonxml::depthcounter=();
851: $Apache::lonxml::depth=-1;
852: $Apache::lonxml::olddepth=-1;
853: }
854:
855: my @timers;
856: my $lasttime;
857: sub increasedepth {
858: my ($token) = @_;
859: $Apache::lonxml::depth++;
860: $Apache::lonxml::depthcounter[$Apache::lonxml::depth]++;
861: if ($Apache::lonxml::depthcounter[$Apache::lonxml::depth]==1) {
862: $Apache::lonxml::olddepth=$Apache::lonxml::depth;
863: }
864: my $time;
865: if ($Apache::lonxml::debug eq "1") {
866: push(@timers,[&gettimeofday()]);
867: $time=&tv_interval($lasttime);
868: $lasttime=[&gettimeofday()];
869: }
870: my $spacing=' 'x($Apache::lonxml::depth-1);
871: my $curdepth=join('_',@Apache::lonxml::depthcounter);
872: &Apache::lonxml::debug("s$spacing$Apache::lonxml::depth : $Apache::lonxml::olddepth : $curdepth : $token->[1] : $time : \n");
873: #print "<br />s $Apache::lonxml::depth : $Apache::lonxml::olddepth : $curdepth : $token->[1]\n";
874: }
875:
876: sub decreasedepth {
877: my ($token) = @_;
878: $Apache::lonxml::depth--;
879: if ($Apache::lonxml::depth<$Apache::lonxml::olddepth-1) {
880: $#Apache::lonxml::depthcounter--;
881: $Apache::lonxml::olddepth=$Apache::lonxml::depth+1;
882: }
883: if ( $Apache::lonxml::depth < -1) {
884: &Apache::lonxml::warning(&mt("Missing tags, unable to properly run file."));
885: $Apache::lonxml::depth='-1';
886: }
887: my ($timer,$time);
888: if ($Apache::lonxml::debug eq "1") {
889: $timer=pop(@timers);
890: $time=&tv_interval($lasttime);
891: $lasttime=[&gettimeofday()];
892: }
893: my $spacing=' 'x$Apache::lonxml::depth;
894: my $curdepth=join('_',@Apache::lonxml::depthcounter);
895: &Apache::lonxml::debug("e$spacing$Apache::lonxml::depth : $Apache::lonxml::olddepth : $curdepth : $token->[1] : $time : ".&tv_interval($timer)."\n");
896: #print "<br />e $Apache::lonxml::depth : $Apache::lonxml::olddepth : $token->[1] : $curdepth\n";
897: }
898:
899: sub get_all_text_unbalanced {
900: #there is a copy of this in lonpublisher.pm
901: my($tag,$pars)= @_;
902: my $token;
903: my $result='';
904: $tag='<'.$tag.'>';
905: while ($token = $$pars[-1]->get_token) {
906: if (($token->[0] eq 'T')||($token->[0] eq 'C')||($token->[0] eq 'D')) {
907: $result.=$token->[1];
908: } elsif ($token->[0] eq 'PI') {
909: $result.=$token->[2];
910: } elsif ($token->[0] eq 'S') {
911: $result.=$token->[4];
912: } elsif ($token->[0] eq 'E') {
913: $result.=$token->[2];
914: }
915: if ($result =~ /\Q$tag\E/is) {
916: ($result,my $redo)=$result =~ /(.*)\Q$tag\E(.*)/is;
917: #&Apache::lonxml::debug('Got a winner with leftovers ::'.$2);
918: #&Apache::lonxml::debug('Result is :'.$1);
919: $redo=$tag.$redo;
920: &Apache::lonxml::newparser($pars,\$redo);
921: last;
922: }
923: }
924: return $result
925: }
926:
927: sub increment_counter {
928: my ($increment) = @_;
929: if (defined($increment) && $increment gt 0) {
930: $Apache::lonxml::counter+=$increment;
931: } else {
932: $Apache::lonxml::counter++;
933: }
934: $Apache::lonxml::counter_changed=1;
935: }
936:
937: sub init_counter {
938: if (defined($ENV{'form.counter'})) {
939: $Apache::lonxml::counter=$ENV{'form.counter'};
940: $Apache::lonxml::counter_changed=0;
941: } else {
942: $Apache::lonxml::counter=1;
943: $Apache::lonxml::counter_changed=1;
944: }
945: }
946:
947: sub store_counter {
948: &Apache::lonnet::appenv(('form.counter' => $Apache::lonxml::counter));
949: return '';
950: }
951:
952: sub get_all_text {
953: my($tag,$pars,$style)= @_;
954: my $gotfullstack=1;
955: if (ref($pars) ne 'ARRAY') {
956: $gotfullstack=0;
957: $pars=[$pars];
958: }
959: if (ref($style) ne 'HASH') {
960: $style={};
961: }
962: my $depth=0;
963: my $token;
964: my $result='';
965: if ( $tag =~ m:^/: ) {
966: my $tag=substr($tag,1);
967: #&Apache::lonxml::debug("have:$tag:");
968: my $top_empty=0;
969: while (($depth >=0) && ($#$pars > -1) && (!$top_empty)) {
970: while (($depth >=0) && ($token = $$pars[-1]->get_token)) {
971: #&Apache::lonxml::debug("e token:$token->[0]:$depth:$token->[1]:".$#$pars.":".$#Apache::lonxml::pwd);
972: if (($token->[0] eq 'T')||($token->[0] eq 'C')||($token->[0] eq 'D')) {
973: $result.=$token->[1];
974: } elsif ($token->[0] eq 'PI') {
975: $result.=$token->[2];
976: } elsif ($token->[0] eq 'S') {
977: if ($token->[1] =~ /^\Q$tag\E$/i) { $depth++; }
978: if ($token->[1] =~ /^LONCAPA_INTERNAL_TURN_STYLE_ON$/) { $Apache::lonxml::usestyle=1; }
979: if ($token->[1] =~ /^LONCAPA_INTERNAL_TURN_STYLE_OFF$/) { $Apache::lonxml::usestyle=0; }
980: $result.=$token->[4];
981: } elsif ($token->[0] eq 'E') {
982: if ( $token->[1] =~ /^\Q$tag\E$/i) { $depth--; }
983: #skip sending back the last end tag
984: if ($depth == 0 && exists($$style{'/'.$token->[1]}) && $Apache::lonxml::usestyle) {
985: my $string=
986: '<LONCAPA_INTERNAL_TURN_STYLE_OFF end="yes" />'.
987: $$style{'/'.$token->[1]}.
988: $token->[2].
989: '<LONCAPA_INTERNAL_TURN_STYLE_ON />';
990: &Apache::lonxml::newparser($pars,\$string);
991: #&Apache::lonxml::debug("reParsing $string");
992: next;
993: }
994: if ($depth > -1) {
995: $result.=$token->[2];
996: } else {
997: $$pars[-1]->unget_token($token);
998: }
999: }
1000: }
1001: if (($depth >=0) && ($#$pars == 0) ) { $top_empty=1; }
1002: if (($depth >=0) && ($#$pars > 0) ) {
1003: pop(@$pars);
1004: pop(@Apache::lonxml::pwd);
1005: }
1006: }
1007: if ($top_empty && $depth >= 0) {
1008: #never found the end tag ran out of text, throw error send back blank
1009: &error('Never found end tag for <'.$tag.
1010: '> current string <pre>'.
1011: &HTML::Entities::encode($result,'<>&"').
1012: '</pre>');
1013: if ($gotfullstack) {
1014: my $newstring='</'.$tag.'>'.$result;
1015: &Apache::lonxml::newparser($pars,\$newstring);
1016: }
1017: $result='';
1018: }
1019: } else {
1020: while ($#$pars > -1) {
1021: while ($token = $$pars[-1]->get_token) {
1022: #&Apache::lonxml::debug("s token:$token->[0]:$depth:$token->[1]");
1023: if (($token->[0] eq 'T')||($token->[0] eq 'C')||
1024: ($token->[0] eq 'D')) {
1025: $result.=$token->[1];
1026: } elsif ($token->[0] eq 'PI') {
1027: $result.=$token->[2];
1028: } elsif ($token->[0] eq 'S') {
1029: if ( $token->[1] =~ /^\Q$tag\E$/i) {
1030: $$pars[-1]->unget_token($token); last;
1031: } else {
1032: $result.=$token->[4];
1033: }
1034: if ($token->[1] =~ /^LONCAPA_INTERNAL_TURN_STYLE_ON$/) { $Apache::lonxml::usestyle=1; }
1035: if ($token->[1] =~ /^LONCAPA_INTERNAL_TURN_STYLE_OFF$/) { $Apache::lonxml::usestyle=0; }
1036: } elsif ($token->[0] eq 'E') {
1037: $result.=$token->[2];
1038: }
1039: }
1040: if (($#$pars > 0) ) {
1041: pop(@$pars);
1042: pop(@Apache::lonxml::pwd);
1043: } else { last; }
1044: }
1045: }
1046: #&Apache::lonxml::debug("Exit:$result:");
1047: return $result
1048: }
1049:
1050: sub newparser {
1051: my ($parser,$contentref,$dir) = @_;
1052: push (@$parser,HTML::LCParser->new($contentref));
1053: $$parser['-1']->xml_mode('1');
1054: if ( $dir eq '' ) {
1055: push (@Apache::lonxml::pwd, $Apache::lonxml::pwd[$#Apache::lonxml::pwd]);
1056: } else {
1057: push (@Apache::lonxml::pwd, $dir);
1058: }
1059: }
1060:
1061: sub parstring {
1062: my ($token) = @_;
1063: my $temp='';
1064: foreach (@{$token->[3]}) {
1065: unless ($_=~/\W/) {
1066: my $val=$token->[2]->{$_};
1067: $val =~ s/([\%\@\\\"\'])/\\$1/g;
1068: $val =~ s/(\$[^{a-zA-Z_])/\\$1/g;
1069: $val =~ s/(\$)$/\\$1/;
1070: #if ($val =~ m/^[\%\@]/) { $val="\\".$val; }
1071: $temp .= "my \$$_=\"$val\";";
1072: }
1073: }
1074: return $temp;
1075: }
1076:
1077: sub writeallows {
1078: unless ($#extlinks>=0) { return; }
1079: my $thisurl='/res/'.&Apache::lonnet::declutter(shift);
1080: if ($ENV{'httpref.'.$thisurl}) {
1081: $thisurl=$ENV{'httpref.'.$thisurl};
1082: }
1083: my $thisdir=$thisurl;
1084: $thisdir=~s/\/[^\/]+$//;
1085: my %httpref=();
1086: foreach (@extlinks) {
1087: $httpref{'httpref.'.
1088: &Apache::lonnet::hreflocation($thisdir,$_)}=$thisurl;
1089: }
1090: @extlinks=();
1091: &Apache::lonnet::appenv(%httpref);
1092: }
1093:
1094: sub register_ssi {
1095: my ($url,%form)=@_;
1096: push (@Apache::lonxml::ssi_info,{'url'=>$url,'form'=>\%form});
1097: return '';
1098: }
1099:
1100: sub do_registered_ssi {
1101: foreach my $info (@Apache::lonxml::ssi_info) {
1102: my %form=%{ $info->{'form'}};
1103: my $url=$info->{'url'};
1104: &Apache::lonnet::ssi($url,%form);
1105: }
1106: }
1107: #
1108: # Afterburner handles anchors, highlights and links
1109: #
1110: sub afterburn {
1111: my $result=shift;
1112: &Apache::loncommon::get_unprocessed_cgi($ENV{'QUERY_STRING'},
1113: ['highlight','anchor','link']);
1114: if ($ENV{'form.highlight'}) {
1115: foreach (split(/\,/,$ENV{'form.highlight'})) {
1116: my $anchorname=$_;
1117: my $matchthis=$anchorname;
1118: $matchthis=~s/\_+/\\s\+/g;
1119: $result=~s/(\Q$matchthis\E)/\<font color=\"red\"\>$1\<\/font\>/gs;
1120: }
1121: }
1122: if ($ENV{'form.link'}) {
1123: foreach (split(/\,/,$ENV{'form.link'})) {
1124: my ($anchorname,$linkurl)=split(/\>/,$_);
1125: my $matchthis=$anchorname;
1126: $matchthis=~s/\_+/\\s\+/g;
1127: $result=~s/(\Q$matchthis\E)/\<a href=\"$linkurl\"\>$1\<\/a\>/gs;
1128: }
1129: }
1130: if ($ENV{'form.anchor'}) {
1131: my $anchorname=$ENV{'form.anchor'};
1132: my $matchthis=$anchorname;
1133: $matchthis=~s/\_+/\\s\+/g;
1134: $result=~s/(\Q$matchthis\E)/\<a name=\"$anchorname\"\>$1\<\/a\>/s;
1135: $result.=(<<"ENDSCRIPT");
1136: <script type="text/javascript">
1137: document.location.hash='$anchorname';
1138: </script>
1139: ENDSCRIPT
1140: }
1141: return $result;
1142: }
1143:
1144: sub storefile {
1145: my ($file,$contents)=@_;
1146: &Apache::lonnet::correct_line_ends(\$contents);
1147: if (my $fh=Apache::File->new('>'.$file)) {
1148: print $fh $contents;
1149: $fh->close();
1150: return 1;
1151: } else {
1152: &warning("Unable to save file $file");
1153: return 0;
1154: }
1155: }
1156:
1157: sub createnewhtml {
1158: my $title=&mt('Title of document goes here');
1159: my $body=&mt('Body of document goes here');
1160: my $filecontents=(<<SIMPLECONTENT);
1161: <!DOCTYPE html PUBLIC "-//W3C//DTD XHTML 1.1//EN" "http://www.w3.org/TR/xhtml/11/DTD/xhtml11.dtd">
1162: <html>
1163: <head>
1164: <title>$title</title>
1165: </head>
1166: <body bgcolor="#FFFFFF">
1167: $body
1168: </body>
1169: </html>
1170: SIMPLECONTENT
1171: return $filecontents;
1172: }
1173:
1174: sub createnewsty {
1175: my $filecontents=(<<SIMPLECONTENT);
1176: <definetag name="">
1177: <render>
1178: <web></web>
1179: <tex></tex>
1180: </render>
1181: </definetag>
1182: SIMPLECONTENT
1183: return $filecontents;
1184: }
1185:
1186:
1187: sub inserteditinfo {
1188: my ($result,$filecontents,$filetype)=@_;
1189: $filecontents = &HTML::Entities::encode($filecontents,'<>&"');
1190: # my $editheader='<a href="#editsection">Edit below</a><hr />';
1191: my $xml_help = '';
1192: my $initialize='';
1193: if ($filetype eq 'html') {
1194: my $addbuttons=&Apache::lonhtmlcommon::htmlareaaddbuttons();
1195: $initialize=&Apache::lonhtmlcommon::htmlareaheaders().
1196: &Apache::lonhtmlcommon::spellheader();
1197: if (!&Apache::lonhtmlcommon::htmlareablocked() &&
1198: &Apache::lonhtmlcommon::htmlareabrowser()) {
1199: $initialize.=(<<FULLPAGE);
1200: <script type="text/javascript">
1201: $addbuttons
1202:
1203: HTMLArea.loadPlugin("FullPage");
1204:
1205: function initDocument() {
1206: var editor=new HTMLArea("filecont",config);
1207: editor.registerPlugin(FullPage);
1208: editor.generate();
1209: }
1210: </script>
1211: FULLPAGE
1212: } else {
1213: $initialize.=(<<FULLPAGE);
1214: <script type="text/javascript">
1215: $addbuttons
1216: function initDocument() {
1217: }
1218: </script>
1219: FULLPAGE
1220: }
1221: $result=~s/\<body([^\>]*)\>/\<body onload="initDocument()" $1\>/i;
1222: $xml_help=&Apache::loncommon::helpLatexCheatsheet();
1223: }
1224: my $cleanbut = '';
1225: if ($filetype eq 'html') {
1226: $cleanbut='<input type="submit" name="attemptclean" value="'.
1227: &mt('Save and then attempt to clean HTML').'" />';
1228: }
1229: my $titledisplay=&display_title();
1230: my %lt=&Apache::lonlocal::texthash('st' => 'Save this',
1231: 'vi' => 'View',
1232: 'ed' => 'Edit');
1233: my $buttons=(<<BUTTONS);
1234: $cleanbut
1235: <input type="submit" name="savethisfile" accesskey="s" value="$lt{'st'}" />
1236: <input type="submit" name="viewmode" accesskey="v" value="$lt{'vi'}" />
1237: BUTTONS
1238: $buttons.=&Apache::lonhtmlcommon::spelllink('xmledit','filecont');
1239: $buttons.=&Apache::lonhtmlcommon::htmlareaselectactive('filecont');
1240: my $editfooter=(<<ENDFOOTER);
1241: $initialize
1242: <hr />
1243: <a name="editsection" />
1244: <form method="post" name="xmledit">
1245: $xml_help
1246: <input type="hidden" name="editmode" value="$lt{'ed'}" />
1247: $buttons<br />
1248: <textarea cols="80" rows="44" name="filecont" id="filecont">$filecontents</textarea>
1249: <br />$buttons
1250: <br />
1251: </form>
1252: $titledisplay
1253: </body>
1254: ENDFOOTER
1255: # $result=~s/(\<body[^\>]*\>)/$1$editheader/is;
1256: $result=~s/(\<\/body\>)/$editfooter/is;
1257: return $result;
1258: }
1259:
1260: sub get_target {
1261: my $viewgrades=&Apache::lonnet::allowed('vgr',$ENV{'request.course.id'});
1262: if ( $ENV{'request.state'} eq 'published') {
1263: if ( defined($ENV{'form.grade_target'})
1264: && ($viewgrades == 'F' )) {
1265: return ($ENV{'form.grade_target'});
1266: } elsif (defined($ENV{'form.grade_target'})) {
1267: if (($ENV{'form.grade_target'} eq 'web') ||
1268: ($ENV{'form.grade_target'} eq 'tex') ) {
1269: return $ENV{'form.grade_target'}
1270: } else {
1271: return 'web';
1272: }
1273: } else {
1274: return 'web';
1275: }
1276: } elsif ($ENV{'request.state'} eq 'construct') {
1277: if ( defined($ENV{'form.grade_target'})) {
1278: return ($ENV{'form.grade_target'});
1279: } else {
1280: return 'web';
1281: }
1282: } else {
1283: return 'web';
1284: }
1285: }
1286:
1287: sub handler {
1288: my $request=shift;
1289:
1290: my $target=&get_target();
1291:
1292: $Apache::lonxml::debug=$ENV{'user.debug'};
1293:
1294: if ($ENV{'browser.mathml'}) {
1295: &Apache::loncommon::content_type($request,'text/xml');
1296: } else {
1297: &Apache::loncommon::content_type($request,'text/html');
1298: }
1299: &Apache::loncommon::no_cache($request);
1300: $request->set_last_modified(&Apache::lonnet::metadata($request->uri,
1301: 'lastrevisiondate'));
1302: $request->send_http_header;
1303:
1304: return OK if $request->header_only;
1305:
1306:
1307: my $file=&Apache::lonnet::filelocation("",$request->uri);
1308: my $filetype;
1309: if ($file =~ /\.sty$/) {
1310: $filetype='sty';
1311: } else {
1312: $filetype='html';
1313: }
1314: #
1315: # Edit action? Save file.
1316: #
1317: unless ($ENV{'request.state'} eq 'published') {
1318: if (($ENV{'form.savethisfile'}) || ($ENV{'form.attemptclean'})) {
1319: if (&storefile($file,$ENV{'form.filecont'})) {
1320: &Apache::lonxml::info("<font COLOR=\"#0000FF\">".
1321: &mt('Updated').": ".
1322: &Apache::lonlocal::locallocaltime(time).
1323: " </font>");
1324: }
1325: }
1326: }
1327: my %mystyle;
1328: my $result = '';
1329: my $filecontents=&Apache::lonnet::getfile($file);
1330: if ($filecontents eq -1) {
1331: my $bodytag=&Apache::loncommon::bodytag('File Error');
1332: my $fnf=&mt('File not found');
1333: $result=(<<ENDNOTFOUND);
1334: <html>
1335: <head>
1336: <title>$fnf</title>
1337: </head>
1338: $bodytag
1339: <b>$fnf: $file</b>
1340: </body>
1341: </html>
1342: ENDNOTFOUND
1343: $filecontents='';
1344: if ($ENV{'request.state'} ne 'published') {
1345: if ($filetype eq 'sty') {
1346: $filecontents=&createnewsty();
1347: } else {
1348: $filecontents=&createnewhtml();
1349: }
1350: $ENV{'form.editmode'}='Edit'; #force edit mode
1351: }
1352: } else {
1353: unless ($ENV{'request.state'} eq 'published') {
1354: if ($filecontents=~/BEGIN LON-CAPA Internal/) {
1355: &Apache::lonxml::error(&mt('This file appears to be a rendering of a Lon-CAPA resource. If this is correct, this resource will act very oddly and incorrectly.'));
1356: }
1357:
1358: if ($ENV{'form.attemptclean'}) {
1359: $filecontents=&htmlclean($filecontents,1);
1360: }
1361: #
1362: # we are in construction space, see if edit mode forced
1363: &Apache::loncommon::get_unprocessed_cgi
1364: ($ENV{'QUERY_STRING'},['editmode']);
1365: }
1366: if (!$ENV{'form.editmode'} || $ENV{'form.viewmode'}) {
1367: $result = &Apache::lonxml::xmlparse($request,$target,$filecontents,
1368: '',%mystyle);
1369: }
1370: }
1371:
1372: #
1373: # Edit action? Insert editing commands
1374: #
1375: unless ($ENV{'request.state'} eq 'published') {
1376: if ($ENV{'form.editmode'} && (!($ENV{'form.viewmode'}))) {
1377: my $displayfile=$request->uri;
1378: $displayfile=~s/^\/[^\/]*//;
1379: my $bodytag='<body bgcolor="#FFFFFF">';
1380: if ($ENV{'environment.remote'} eq 'off') {
1381: $bodytag=&Apache::loncommon::bodytag();
1382: }
1383: $result='<html>'.$bodytag.
1384: &Apache::lonxml::message_location().'<h3>'.
1385: $displayfile.
1386: '</h3></body></html>';
1387: $result=&inserteditinfo($result,$filecontents,$filetype);
1388: }
1389: }
1390: if ($filetype eq 'html') { writeallows($request->uri); }
1391:
1392:
1393: &Apache::lonxml::add_messages(\$result);
1394: $request->print($result);
1395:
1396: return OK;
1397: }
1398:
1399: sub display_title {
1400: my $result;
1401: if ($ENV{'request.state'} eq 'construct') {
1402: my $title=&Apache::lonnet::gettitle();
1403: if (!defined($title) || $title eq '') {
1404: $title = $ENV{'request.filename'};
1405: $title = substr($title, rindex($title, '/') + 1);
1406: }
1407: $result = "<script type='text/javascript'>top.document.title = '$title - LON-CAPA Construction Space';</script>";
1408: }
1409: return $result;
1410: }
1411:
1412: sub debug {
1413: if ($Apache::lonxml::debug eq "1") {
1414: $|=1;
1415: my $request=$Apache::lonxml::request;
1416: if (!$request) { $request=Apache->request; }
1417: $request->print('<font size="-2"><pre>DEBUG:'.&HTML::Entities::encode($_[0],'<>&"')."</pre></font>\n");
1418: #&Apache::lonnet::logthis($_[0]);
1419: }
1420: }
1421:
1422: sub show_error_warn_msg {
1423: if ($ENV{'request.filename'} eq '/home/httpd/html/res/lib/templates/simpleproblem.problem' &&
1424: &Apache::lonnet::allowed('mdc',$ENV{'request.course.id'})) {
1425: return 1;
1426: }
1427: return (($Apache::lonxml::debug eq 1) ||
1428: ($ENV{'request.state'} eq 'construct') ||
1429: ($Apache::lonhomework::browse eq 'F'
1430: &&
1431: $ENV{'form.show_errors'} eq 'on'));
1432: }
1433:
1434: sub error {
1435: $errorcount++;
1436: if ( &show_error_warn_msg() ) {
1437: # If printing in construction space, put the error inside <pre></pre>
1438: push(@Apache::lonxml::error_messages,
1439: $Apache::lonxml::warnings_error_header.
1440: "<b>ERROR:</b>".join("<br />\n",@_)."<br />\n");
1441: $Apache::lonxml::warnings_error_header='';
1442: } else {
1443: my $errormsg;
1444: my ($symb)=&Apache::lonnet::symbread();
1445: if ( !$symb ) {
1446: #public or browsers
1447: $errormsg=&mt("An error occured while processing this resource. The author has been notified.");
1448: }
1449: #notify author
1450: &Apache::lonmsg::author_res_msg($ENV{'request.filename'},join('<br />',@_));
1451: #notify course
1452: if ( $symb && $ENV{'request.course.id'} ) {
1453: my (undef,%users)=&Apache::lonfeedback::decide_receiver(undef,0,1,1,1);
1454: my $declutter=&Apache::lonnet::declutter($ENV{'request.filename'});
1455: my @userlist;
1456: foreach (keys %users) {
1457: my ($user,$domain) = split(/:/, $_);
1458: push(@userlist,"$user\@$domain");
1459: &Apache::lonmsg::user_normal_msg($user,$domain,
1460: "Error [$declutter]",join('<br />',@_));
1461: }
1462: if ($ENV{'request.role.adv'}) {
1463: $errormsg=&mt("An error occured while processing this resource. The course personnel ([_1]) and the author have been notified.",join(', ',@userlist));
1464: } else {
1465: $errormsg=&mt("An error occured while processing this resource. The instructor has been notified.");
1466: }
1467: }
1468: push(@Apache::lonxml::error_messages,"<b>$errormsg</b> <br />");
1469: }
1470: }
1471:
1472: sub warning {
1473: $warningcount++;
1474:
1475: if ($ENV{'form.grade_target'} ne 'tex') {
1476: if ( &show_error_warn_msg() ) {
1477: my $request=$Apache::lonxml::request;
1478: if (!$request) { $request=Apache->request; }
1479: push(@Apache::lonxml::warning_messages,
1480: $Apache::lonxml::warnings_error_header.
1481: "<b>W</b>ARNING<b>:</b>".join('<br />',@_)."<br />\n");
1482: $Apache::lonxml::warnings_error_header='';
1483: }
1484: }
1485: }
1486:
1487: sub info {
1488: if ($ENV{'form.grade_target'} ne 'tex'
1489: && $ENV{'request.state'} eq 'construct') {
1490: push(@Apache::lonxml::info_messages,join('<br />',@_)."<br />\n");
1491: }
1492: }
1493:
1494: sub message_location {
1495: return '__LONCAPA_INTERNAL_MESSAGE_LOCATION__';
1496: }
1497:
1498: sub add_messages {
1499: my ($msg)=@_;
1500: my $result=join(' ',
1501: @Apache::lonxml::info_messages,
1502: @Apache::lonxml::error_messages,
1503: @Apache::lonxml::warning_messages);
1504: undef(@Apache::lonxml::info_messages);
1505: undef(@Apache::lonxml::error_messages);
1506: undef(@Apache::lonxml::warning_messages);
1507: $$msg=~s/__LONCAPA_INTERNAL_MESSAGE_LOCATION__/$result/;
1508: $$msg=~s/__LONCAPA_INTERNAL_MESSAGE_LOCATION__//g;
1509: }
1510:
1511: sub get_param {
1512: my ($param,$parstack,$safeeval,$context,$case_insensitive) = @_;
1513: if ( ! $context ) { $context = -1; }
1514: my $args ='';
1515: if ( $#$parstack > (-2-$context) ) { $args=$$parstack[$context]; }
1516: if ( ! $Apache::lonxml::usestyle ) {
1517: $args=$Apache::lonxml::style_values.$args;
1518: }
1519: if ( ! $args ) { return undef; }
1520: if ( $case_insensitive ) {
1521: if ($args =~ s/(my \$)(\Q$param\E)(=\")/$1.lc($2).$3/ei) {
1522: return &Apache::run::run("{$args;".'return $'.$param.'}',
1523: $safeeval); #'
1524: } else {
1525: return undef;
1526: }
1527: } else {
1528: if ( $args =~ /my \$\Q$param\E=\"/ ) {
1529: return &Apache::run::run("{$args;".'return $'.$param.'}',
1530: $safeeval); #'
1531: } else {
1532: return undef;
1533: }
1534: }
1535: }
1536:
1537: sub get_param_var {
1538: my ($param,$parstack,$safeeval,$context,$case_insensitive) = @_;
1539: if ( ! $context ) { $context = -1; }
1540: my $args ='';
1541: if ( $#$parstack > (-2-$context) ) { $args=$$parstack[$context]; }
1542: if ( ! $Apache::lonxml::usestyle ) {
1543: $args=$Apache::lonxml::style_values.$args;
1544: }
1545: &Apache::lonxml::debug("Args are $args param is $param");
1546: if ($case_insensitive) {
1547: if (! ($args=~s/(my \$)(\Q$param\E)(=\")/$1.lc($2).$3/ei)) {
1548: return undef;
1549: }
1550: } elsif ( $args !~ /my \$\Q$param\E=\"/ ) { return undef; }
1551: my $value=&Apache::run::run("{$args;".'return $'.$param.'}',$safeeval); #'
1552: &Apache::lonxml::debug("first run is $value");
1553: if ($value =~ /^[\$\@\%][a-zA-Z_]\w*$/) {
1554: &Apache::lonxml::debug("doing second");
1555: my @result=&Apache::run::run("return $value",$safeeval,1);
1556: if (!defined($result[0])) {
1557: return $value
1558: } else {
1559: if (wantarray) { return @result; } else { return $result[0]; }
1560: }
1561: } else {
1562: return $value;
1563: }
1564: }
1565:
1566: sub register_insert {
1567: my @data = split /\n/, &Apache::lonnet::getfile('/home/httpd/lonTabs/insertlist.tab');
1568: my $i;
1569: my $tagnum=0;
1570: my @order;
1571: for ($i=0;$i < $#data; $i++) {
1572: my $line = $data[$i];
1573: if ( $line =~ /^\#/ || $line =~ /^\s*\n/) { next; }
1574: if ( $line =~ /TABLE/ ) { last; }
1575: my ($tag,$descrip,$color,$function,$show,$helpfile,$helpdesc) = split(/,/, $line);
1576: if ($tag) {
1577: $insertlist{"$tagnum.tag"} = $tag;
1578: $insertlist{"$tagnum.description"} = $descrip;
1579: $insertlist{"$tagnum.color"} = $color;
1580: $insertlist{"$tagnum.function"} = $function;
1581: if (!defined($show)) { $show='yes'; }
1582: $insertlist{"$tagnum.show"}= $show;
1583: $insertlist{"$tagnum.helpfile"} = $helpfile;
1584: $insertlist{"$tagnum.helpdesc"} = $helpdesc;
1585: $insertlist{"$tag.num"}=$tagnum;
1586: $tagnum++;
1587: }
1588: }
1589: $i++; #skipping TABLE line
1590: $tagnum = 0;
1591: for (;$i < $#data;$i++) {
1592: my $line = $data[$i];
1593: my ($mnemonic,@which) = split(/ +/,$line);
1594: my $tag = $insertlist{"$tagnum.tag"};
1595: for (my $j=0;$j <=$#which;$j++) {
1596: if ( $which[$j] eq 'Y' ) {
1597: if ($insertlist{"$j.show"} ne 'no') {
1598: push(@{ $insertlist{"$tag.which"} },$j);
1599: }
1600: }
1601: }
1602: $tagnum++;
1603: }
1604: }
1605:
1606: sub description {
1607: my ($token)=@_;
1608: my $tagnum;
1609: my $tag=$token->[1];
1610: foreach my $namespace (reverse @Apache::lonxml::namespace) {
1611: my $testtag=$namespace.'::'.$tag;
1612: $tagnum=$insertlist{"$testtag.num"};
1613: if (defined($tagnum)) { last; }
1614: }
1615: if (!defined ($tagnum)) { $tagnum=$Apache::lonxml::insertlist{"$tag.num"}; }
1616: return $insertlist{$tagnum.'.description'};
1617: }
1618:
1619: # Returns a list containing the help file, and the description
1620: sub helpinfo {
1621: my ($token)=@_;
1622: my $tagnum;
1623: my $tag=$token->[1];
1624: foreach my $namespace (reverse @Apache::lonxml::namespace) {
1625: my $testtag=$namespace.'::'.$tag;
1626: $tagnum=$insertlist{"$testtag.num"};
1627: if (defined($tagnum)) { last; }
1628: }
1629: if (!defined ($tagnum)) { $tagnum=$Apache::lonxml::insertlist{"$tag.num"}; }
1630: return ($insertlist{$tagnum.'.helpfile'}, $insertlist{$tagnum.'.helpdesc'});
1631: }
1632:
1633: # ----------------------------------------------------------------- whichuser
1634: # returns a list of $symb, $courseid, $domain, $name that is correct for
1635: # calls to lonnet functions for this setup.
1636: # - looks for form.grade_ parameters
1637: sub whichuser {
1638: my ($passedsymb)=@_;
1639: my ($symb,$courseid,$domain,$name,$publicuser);
1640: if (defined($ENV{'form.grade_symb'})) {
1641: my ($tmp_courseid)=
1642: &Apache::loncommon::get_env_multiple('form.grade_courseid');
1643: my $allowed=&Apache::lonnet::allowed('vgr',$tmp_courseid);
1644: if (!$allowed &&
1645: exists($ENV{'request.course.sec'}) &&
1646: $ENV{'request.course.sec'} !~ /^\s*$/) {
1647: $allowed=&Apache::lonnet::allowed('vgr',$tmp_courseid.
1648: '/'.$ENV{'request.course.sec'});
1649: }
1650: if ($allowed) {
1651: ($symb)=&Apache::loncommon::get_env_multiple('form.grade_symb');
1652: $courseid=$tmp_courseid;
1653: ($domain)=&Apache::loncommon::get_env_multiple('form.grade_domain');
1654: ($name)=&Apache::loncommon::get_env_multiple('form.grade_username');
1655: return ($symb,$courseid,$domain,$name,$publicuser);
1656: }
1657: }
1658: if (!$passedsymb) {
1659: $symb=&Apache::lonnet::symbread();
1660: } else {
1661: $symb=$passedsymb;
1662: }
1663: $courseid=$ENV{'request.course.id'};
1664: $domain=$ENV{'user.domain'};
1665: $name=$ENV{'user.name'};
1666: if ($name eq 'public' && $domain eq 'public') {
1667: if (!defined($ENV{'form.username'})) {
1668: $ENV{'form.username'}.=time.rand(10000000);
1669: }
1670: $name.=$ENV{'form.username'};
1671: }
1672: return ($symb,$courseid,$domain,$name,$publicuser);
1673: }
1674:
1675: 1;
1676: __END__
1677:
1678:
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