1: # The LearningOnline Network with CAPA
2: # XML Parser Module
3: #
4: # $Id: lonxml.pm,v 1.382 2005/09/14 19:20:23 albertel Exp $
5: #
6: # Copyright Michigan State University Board of Trustees
7: #
8: # This file is part of the LearningOnline Network with CAPA (LON-CAPA).
9: #
10: # LON-CAPA is free software; you can redistribute it and/or modify
11: # it under the terms of the GNU General Public License as published by
12: # the Free Software Foundation; either version 2 of the License, or
13: # (at your option) any later version.
14: #
15: # LON-CAPA is distributed in the hope that it will be useful,
16: # but WITHOUT ANY WARRANTY; without even the implied warranty of
17: # MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
18: # GNU General Public License for more details.
19: #
20: # You should have received a copy of the GNU General Public License
21: # along with LON-CAPA; if not, write to the Free Software
22: # Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA 02111-1307 USA
23: #
24: # /home/httpd/html/adm/gpl.txt
25: #
26: # http://www.lon-capa.org/
27: #
28: # Copyright for TtHfunc and TtMfunc by Ian Hutchinson.
29: # TtHfunc and TtMfunc (the "Code") may be compiled and linked into
30: # binary executable programs or libraries distributed by the
31: # Michigan State University (the "Licensee"), but any binaries so
32: # distributed are hereby licensed only for use in the context
33: # of a program or computational system for which the Licensee is the
34: # primary author or distributor, and which performs substantial
35: # additional tasks beyond the translation of (La)TeX into HTML.
36: # The C source of the Code may not be distributed by the Licensee
37: # to any other parties under any circumstances.
38: #
39:
40:
41: package Apache::lonxml;
42: use vars
43: qw(@pwd @outputstack $redirection $import @extlinks $metamode $evaluate %insertlist @namespace $errorcount $warningcount @htmlareafields);
44: use strict;
45: use HTML::LCParser();
46: use HTML::TreeBuilder();
47: use HTML::Entities();
48: use Safe();
49: use Safe::Hole();
50: use Math::Cephes();
51: use Math::Random();
52: use Opcode();
53: use POSIX qw(strftime);
54: use Time::HiRes qw( gettimeofday tv_interval );
55:
56: sub register {
57: my ($space,@taglist) = @_;
58: foreach my $temptag (@taglist) {
59: push(@{ $Apache::lonxml::alltags{$temptag} },$space);
60: }
61: }
62:
63: sub deregister {
64: my ($space,@taglist) = @_;
65: foreach my $temptag (@taglist) {
66: my $tempspace = $Apache::lonxml::alltags{$temptag}[-1];
67: if ($tempspace eq $space) {
68: pop(@{ $Apache::lonxml::alltags{$temptag} });
69: }
70: }
71: #&printalltags();
72: }
73:
74: use Apache::Constants qw(:common);
75: use Apache::lontexconvert();
76: use Apache::style();
77: use Apache::run();
78: use Apache::londefdef();
79: use Apache::scripttag();
80: use Apache::languagetags();
81: use Apache::edit();
82: use Apache::inputtags();
83: use Apache::outputtags();
84: use Apache::lonnet;
85: use Apache::File();
86: use Apache::loncommon();
87: use Apache::lonfeedback();
88: use Apache::lonmsg();
89: use Apache::loncacc();
90: use Apache::lonlocal;
91:
92: #================================================== Main subroutine: xmlparse
93: #debugging control, to turn on debugging modify the correct handler
94: $Apache::lonxml::debug=0;
95:
96: # keeps count of the number of warnings and errors generated in a parse
97: $warningcount=0;
98: $errorcount=0;
99:
100: #path to the directory containing the file currently being processed
101: @pwd=();
102:
103: #these two are used for capturing a subset of the output for later processing,
104: #don't touch them directly use &startredirection and &endredirection
105: @outputstack = ();
106: $redirection = 0;
107:
108: #controls wheter the <import> tag actually does
109: $import = 1;
110: @extlinks=();
111:
112: # meta mode is a bit weird only some output is to be turned off
113: #<output> tag turns metamode off (defined in londefdef.pm)
114: $metamode = 0;
115:
116: # turns on and of run::evaluate actually derefencing var refs
117: $evaluate = 1;
118:
119: # data structure for eidt mode, determines what tags can go into what other tags
120: %insertlist=();
121:
122: # stores the list of active tag namespaces
123: @namespace=();
124:
125: # has the dynamic menu been updated to know about this resource
126: $Apache::lonxml::registered=0;
127:
128: # a pointer the the Apache request object
129: $Apache::lonxml::request='';
130:
131: # a problem number counter, and check on ether it is used
132: $Apache::lonxml::counter=1;
133: $Apache::lonxml::counter_changed=0;
134:
135: #internal check on whether to look at style defs
136: $Apache::lonxml::usestyle=1;
137:
138: #locations used to store the parameter string for style substitutions
139: $Apache::lonxml::style_values='';
140: $Apache::lonxml::style_end_values='';
141:
142: #array of ssi calls that need to occur after we are done parsing
143: @Apache::lonxml::ssi_info=();
144:
145: #should we do the postag variable interpolation
146: $Apache::lonxml::post_evaluate=1;
147:
148: #a header message to emit in the case of any generated warning or errors
149: $Apache::lonxml::warnings_error_header='';
150:
151: sub xmlbegin {
152: my ($style)=@_;
153: my $output='';
154: @htmlareafields=();
155: if ($env{'browser.mathml'}) {
156: $output='<?xml version="1.0"?>'
157: #.'<?xml-stylesheet type="text/css" href="/adm/MathML/mathml.css"?>'."\n"
158: # .'<!DOCTYPE html SYSTEM "/adm/MathML/mathml.dtd" '
159:
160: # .'<!DOCTYPE html PUBLIC "-//W3C//DTD XHTML 1.0 Transitional//EN" "http://www.w3.org/TR/xhtml1/DTD/xhtml1-transitional.dtd" [<!ENTITY mathns "http://www.w3.org/1998/Math/MathML">] >'
161: .'<!DOCTYPE html PUBLIC "-//W3C//DTD XHTML 1.1 plus MathML 2.0 plus SVG 1.1//EN" "http://www.w3.org/2002/04/xhtml-math-svg/xhtml-math-svg.dtd">'
162: .'<html xmlns:math="http://www.w3.org/1998/Math/MathML" '
163: .'xmlns="http://www.w3.org/1999/xhtml">';
164: } else {
165: $output='<!DOCTYPE html PUBLIC "-//W3C//DTD XHTML 1.0 Transitional//EN" "http://www.w3.org/TR/xhtml1/DTD/xhtml1-transitional.dtd"><html>';
166: }
167: if ($style eq 'encode') {
168: $output=&HTML::Entities::encode($output,'<>&"');
169: }
170: return $output;
171: }
172:
173: sub xmlend {
174: my ($target,$parser)=@_;
175: my $mode='xml';
176: my $status='OPEN';
177: if ($Apache::lonhomework::parsing_a_problem ||
178: $Apache::lonhomework::parsing_a_task ) {
179: $mode='problem';
180: $status=$Apache::inputtags::status[-1];
181: }
182: my $discussion;
183: &Apache::loncommon::get_unprocessed_cgi($ENV{'QUERY_STRING'},
184: ['LONCAPA_INTERNAL_no_discussion']);
185: if (! exists($env{'form.LONCAPA_INTERNAL_no_discussion'}) ||
186: $env{'form.LONCAPA_INTERNAL_no_discussion'} ne 'true') {
187: $discussion=&Apache::lonfeedback::list_discussion($mode,$status);
188: }
189: if ($target eq 'tex') {
190: $discussion.='<tex>\keephidden{ENDOFPROBLEM}\vskip 0.5mm\noindent\makebox[\textwidth/$number_of_columns][b]{\hrulefill}\end{document}</tex>';
191: &Apache::lonxml::newparser($parser,\$discussion,'');
192: return '';
193: } else {
194: return $discussion.&Apache::loncommon::endbodytag();
195: }
196: }
197:
198: sub tokeninputfield {
199: my $defhost=$Apache::lonnet::perlvar{'lonHostID'};
200: $defhost=~tr/a-z/A-Z/;
201: return (<<ENDINPUTFIELD)
202: <script type="text/javascript">
203: function updatetoken() {
204: var comp=new Array;
205: var barcode=unescape(document.tokeninput.barcode.value);
206: comp=barcode.split('*');
207: if (typeof(comp[0])!="undefined") {
208: document.tokeninput.codeone.value=comp[0];
209: }
210: if (typeof(comp[1])!="undefined") {
211: document.tokeninput.codetwo.value=comp[1];
212: }
213: if (typeof(comp[2])!="undefined") {
214: comp[2]=comp[2].toUpperCase();
215: document.tokeninput.codethree.value=comp[2];
216: }
217: document.tokeninput.barcode.value='';
218: }
219: </script>
220: <form method="post" name="tokeninput">
221: <table border="2" bgcolor="#FFFFBB">
222: <tr><th>DocID Checkin</th></tr>
223: <tr><td>
224: <table>
225: <tr>
226: <td>Scan in Barcode</td>
227: <td><input type="text" size="22" name="barcode"
228: onChange="updatetoken()"/></td>
229: </tr>
230: <tr><td><i>or</i> Type in DocID</td>
231: <td>
232: <input type="text" size="5" name="codeone" />
233: <b><font size="+2">*</font></b>
234: <input type="text" size="5" name="codetwo" />
235: <b><font size="+2">*</font></b>
236: <input type="text" size="10" name="codethree" value="$defhost"
237: onChange="this.value=this.value.toUpperCase()" />
238: </td></tr>
239: </table>
240: </td></tr>
241: <tr><td><input type="submit" value="Check in DocID" /></td></tr>
242: </table>
243: </form>
244: ENDINPUTFIELD
245: }
246:
247: sub maketoken {
248: my ($symb,$tuname,$tudom,$tcrsid)=@_;
249: unless ($symb) {
250: $symb=&Apache::lonnet::symbread();
251: }
252: unless ($tuname) {
253: $tuname=$env{'user.name'};
254: $tudom=$env{'user.domain'};
255: $tcrsid=$env{'request.course.id'};
256: }
257:
258: return &Apache::lonnet::checkout($symb,$tuname,$tudom,$tcrsid);
259: }
260:
261: sub printtokenheader {
262: my ($target,$token,$tsymb,$tcrsid,$tudom,$tuname)=@_;
263: unless ($token) { return ''; }
264:
265: my ($symb,$courseid,$domain,$name) = &Apache::lonxml::whichuser();
266: unless ($tsymb) {
267: $tsymb=$symb;
268: }
269: unless ($tuname) {
270: $tuname=$name;
271: $tudom=$domain;
272: $tcrsid=$courseid;
273: }
274:
275: my %reply=&Apache::lonnet::get('environment',
276: ['firstname','middlename','lastname','generation'],
277: $tudom,$tuname);
278: my $plainname=$reply{'firstname'}.' '.
279: $reply{'middlename'}.' '.
280: $reply{'lastname'}.' '.
281: $reply{'generation'};
282:
283: if ($target eq 'web') {
284: my %idhash=&Apache::lonnet::idrget($tudom,($tuname));
285: return
286: '<img align="right" src="/cgi-bin/barcode.png?encode='.$token.'" />'.
287: &mt('Checked out for').' '.$plainname.
288: '<br />'.&mt('User').': '.$tuname.' at '.$tudom.
289: '<br />'.&mt('ID').': '.$idhash{$tuname}.
290: '<br />'.&mt('CourseID').': '.$tcrsid.
291: '<br />'.&mt('Course').': '.$env{'course.'.$tcrsid.'.description'}.
292: '<br />'.&mt('DocID').': '.$token.
293: '<br />'.&mt('Time').': '.&Apache::lonlocal::locallocaltime().'<hr />';
294: } else {
295: return $token;
296: }
297: }
298:
299: sub fontsettings {
300: my $headerstring='';
301: if (($env{'browser.os'} eq 'mac') && (!$env{'browser.mathml'})) {
302: $headerstring.=
303: '<meta Content-Type="text/html; charset=x-mac-roman" />';
304: } elsif (!$env{'browser.mathml'} && $env{'browser.unicode'}) {
305: $headerstring.=
306: '<meta http-equiv="Content-Type" content="text/html; charset=utf-8" />';
307: }
308: return $headerstring;
309: }
310:
311: sub printalltags {
312: my $temp;
313: foreach $temp (sort keys %Apache::lonxml::alltags) {
314: &Apache::lonxml::debug("$temp -- ".
315: join(',',@{ $Apache::lonxml::alltags{$temp} }));
316: }
317: }
318:
319: sub xmlparse {
320: my ($request,$target,$content_file_string,$safeinit,%style_for_target) = @_;
321:
322: &setup_globals($request,$target);
323: &Apache::inputtags::initialize_inputtags();
324: &Apache::bridgetask::initialize_bridgetask();
325: &Apache::outputtags::initialize_outputtags();
326: &Apache::edit::initialize_edit();
327: &Apache::londefdef::initialize_londefdef();
328:
329: #
330: # do we have a course style file?
331: #
332:
333: if ($env{'request.course.id'} && $env{'request.state'} ne 'construct') {
334: my $bodytext=
335: $env{'course.'.$env{'request.course.id'}.'.default_xml_style'};
336: if ($bodytext) {
337: foreach my $file (split(',',$bodytext)) {
338: my $location=&Apache::lonnet::filelocation('',$file);
339: my $styletext=&Apache::lonnet::getfile($location);
340: if ($styletext ne '-1') {
341: %style_for_target = (%style_for_target,
342: &Apache::style::styleparser($target,$styletext));
343: }
344: }
345: }
346: } elsif ($env{'construct.style'} && ($env{'request.state'} eq 'construct')) {
347: my $location=&Apache::lonnet::filelocation('',$env{'construct.style'});
348: my $styletext=&Apache::lonnet::getfile($location);
349: if ($styletext ne '-1') {
350: %style_for_target = (%style_for_target,
351: &Apache::style::styleparser($target,$styletext));
352: }
353: }
354: #&printalltags();
355: my @pars = ();
356: my $pwd=$env{'request.filename'};
357: $pwd =~ s:/[^/]*$::;
358: &newparser(\@pars,\$content_file_string,$pwd);
359:
360: my $safeeval = new Safe;
361: my $safehole = new Safe::Hole;
362: &init_safespace($target,$safeeval,$safehole,$safeinit);
363: #-------------------- Redefinition of the target in the case of compound target
364:
365: ($target, my @tenta) = split('&&',$target);
366:
367: my @stack = ();
368: my @parstack = ();
369: &initdepth();
370: &init_alarm();
371: my $finaloutput = &inner_xmlparse($target,\@stack,\@parstack,\@pars,
372: $safeeval,\%style_for_target);
373:
374: if ($env{'request.uri'}) {
375: &writeallows($env{'request.uri'});
376: }
377: &do_registered_ssi();
378: if ($Apache::lonxml::counter_changed) { &store_counter() }
379: if ($env{'form.return_only_error_and_warning_counts'}) {
380: return "$errorcount:$warningcount";
381: }
382: return $finaloutput;
383: }
384:
385: sub latex_special_symbols {
386: my ($string,$where)=@_;
387: if ($where eq 'header') {
388: $string =~ s/(\\|_|\^)/ /g;
389: $string =~ s/(\$|%|\{|\})/\\$1/g;
390: $string =~ s/_/ /g;
391: $string=&Apache::lonprintout::character_chart($string);
392: # any & or # leftover should be safe to just escape
393: $string=~s/([^\\])\&/$1\\\&/g;
394: $string=~s/([^\\])\#/$1\\\#/g;
395: } else {
396: $string=~s/\\/\\ensuremath{\\backslash}/g;
397: $string=~s/\\\%|\%/\\\%/g;
398: $string=~s/\\{|{/\\{/g;
399: $string=~s/\\}|}/\\}/g;
400: $string=~s/\\ensuremath\\{\\backslash\\}/\\ensuremath{\\backslash}/g;
401: $string=~s/\\\$|\$/\\\$/g;
402: $string=~s/\\\_|\_/\\\_/g;
403: $string=~s/([^\\]|^)(\~|\^)/$1\\$2\\strut /g;
404: $string=~s/(>|<)/\\ensuremath\{$1\}/g; #more or less
405: $string=&Apache::lonprintout::character_chart($string);
406: # any & or # leftover should be safe to just escape
407: $string=~s/\\\&|\&/\\\&/g;
408: $string=~s/\\\#|\#/\\\#/g;
409: $string=~s/\|/\$\\mid\$/g;
410: #single { or } How to escape?
411: }
412: return $string;
413: }
414:
415: sub inner_xmlparse {
416: my ($target,$stack,$parstack,$pars,$safeeval,$style_for_target)=@_;
417: my $finaloutput = '';
418: my $result;
419: my $token;
420: my $dontpop=0;
421: while ( $#$pars > -1 ) {
422: while ($token = $$pars['-1']->get_token) {
423: if (($token->[0] eq 'T') || ($token->[0] eq 'C') ) {
424: if ($metamode<1) {
425: my $text=$token->[1];
426: if ($token->[0] eq 'C' && $target eq 'tex') {
427: $text = '';
428: # $text = '%'.$text."\n";
429: }
430: $result.=$text;
431: }
432: } elsif (($token->[0] eq 'D')) {
433: if ($metamode<1 && $target eq 'web') {
434: my $text=$token->[1];
435: $result.=$text;
436: }
437: } elsif ($token->[0] eq 'PI') {
438: if ($metamode<1 && $target eq 'web') {
439: $result=$token->[2];
440: }
441: } elsif ($token->[0] eq 'S') {
442: # add tag to stack
443: push (@$stack,$token->[1]);
444: # add parameters list to another stack
445: push (@$parstack,&parstring($token));
446: &increasedepth($token);
447: if ($Apache::lonxml::usestyle &&
448: exists($$style_for_target{$token->[1]})) {
449: $Apache::lonxml::usestyle=0;
450: my $string=$$style_for_target{$token->[1]}.
451: '<LONCAPA_INTERNAL_TURN_STYLE_ON />';
452: &Apache::lonxml::newparser($pars,\$string);
453: $Apache::lonxml::style_values=$$parstack[-1];
454: $Apache::lonxml::style_end_values=$$parstack[-1];
455: } else {
456: $result = &callsub("start_$token->[1]", $target, $token, $stack,
457: $parstack, $pars, $safeeval, $style_for_target);
458: }
459: } elsif ($token->[0] eq 'E') {
460: if ($Apache::lonxml::usestyle &&
461: exists($$style_for_target{'/'."$token->[1]"})) {
462: $Apache::lonxml::usestyle=0;
463: my $string=$$style_for_target{'/'.$token->[1]}.
464: '<LONCAPA_INTERNAL_TURN_STYLE_ON end="'.$token->[1].'" />';
465: &Apache::lonxml::newparser($pars,\$string);
466: $Apache::lonxml::style_values=$Apache::lonxml::style_end_values;
467: $Apache::lonxml::style_end_values='';
468: $dontpop=1;
469: } else {
470: #clear out any tags that didn't end
471: while ($token->[1] ne $$stack['-1'] && ($#$stack > -1)) {
472: my $lasttag=$$stack[-1];
473: if ($token->[1] =~ /^\Q$lasttag\E$/i) {
474: &Apache::lonxml::warning('Using tag </'.$token->[1].'> on line '.$token->[3].' as end tag to <'.$$stack[-1].'>');
475: last;
476: } else {
477: &Apache::lonxml::warning('Found tag </'.$token->[1].'> on line '.$token->[3].' when looking for </'.$$stack[-1].'> in file');
478: &end_tag($stack,$parstack,$token);
479: }
480: }
481: $result = &callsub("end_$token->[1]", $target, $token, $stack,
482: $parstack, $pars,$safeeval, $style_for_target);
483: }
484: } else {
485: &Apache::lonxml::error("Unknown token event :$token->[0]:$token->[1]:");
486: }
487: #evaluate variable refs in result
488: if ($Apache::lonxml::post_evaluate &&$result ne "") {
489: my $extras;
490: if (!$Apache::lonxml::usestyle) {
491: $extras=$Apache::lonxml::style_values;
492: }
493: if ( $#$parstack > -1 ) {
494: $result=&Apache::run::evaluate($result,$safeeval,$extras.$$parstack[-1]);
495: } else {
496: $result= &Apache::run::evaluate($result,$safeeval,$extras);
497: }
498: }
499: $Apache::lonxml::post_evaluate=1;
500:
501: if (($token->[0] eq 'T') || ($token->[0] eq 'C') || ($token->[0] eq 'D') ) {
502: #Style file definitions should be correct
503: if ($target eq 'tex' && ($Apache::lonxml::usestyle)) {
504: $result=&latex_special_symbols($result);
505: }
506: }
507:
508: if ($Apache::lonxml::redirection) {
509: $Apache::lonxml::outputstack['-1'] .= $result;
510: } else {
511: $finaloutput.=$result;
512: }
513: $result = '';
514:
515: if ($token->[0] eq 'E' && !$dontpop) {
516: &end_tag($stack,$parstack,$token);
517: }
518: $dontpop=0;
519: }
520: if ($#$pars > -1) {
521: pop @$pars;
522: pop @Apache::lonxml::pwd;
523: }
524: }
525:
526: # if ($target eq 'meta') {
527: # $finaloutput.=&endredirection;
528: # }
529:
530:
531: if (($ENV{'QUERY_STRING'}) && ($target eq 'web')) {
532: $finaloutput=&afterburn($finaloutput);
533: }
534: return $finaloutput;
535: }
536:
537: ##
538: ## Looks to see if there is a subroutine defined for this tag. If so, call it,
539: ## otherwise do not call it as we do not know what it is.
540: ##
541: sub callsub {
542: my ($sub,$target,$token,$tagstack,$parstack,$parser,$safeeval,$style)=@_;
543: my $currentstring='';
544: my $nodefault;
545: {
546: my $sub1;
547: no strict 'refs';
548: my $tag=$token->[1];
549: # get utterly rid of extended html tags
550: if ($tag=~/^x\-/i) { return ''; }
551: my $space=$Apache::lonxml::alltags{$tag}[-1];
552: if (!$space) {
553: $tag=~tr/A-Z/a-z/;
554: $sub=~tr/A-Z/a-z/;
555: $space=$Apache::lonxml::alltags{$tag}[-1]
556: }
557:
558: my $deleted=0;
559: $Apache::lonxml::curdepth=join('_',@Apache::lonxml::depthcounter);
560: if (($token->[0] eq 'S') && ($target eq 'modified')) {
561: $deleted=&Apache::edit::handle_delete($space,$target,$token,$tagstack,
562: $parstack,$parser,$safeeval,
563: $style);
564: }
565: if (!$deleted) {
566: if ($space) {
567: #&Apache::lonxml::debug("Calling sub $sub in $space $metamode");
568: $sub1="$space\:\:$sub";
569: ($currentstring,$nodefault) = &$sub1($target,$token,$tagstack,
570: $parstack,$parser,$safeeval,
571: $style);
572: } else {
573: if ($target eq 'tex') {
574: # throw away tag name
575: return '';
576: }
577: #&Apache::lonxml::debug("NOT Calling sub $sub in $space $metamode");
578: if ($metamode <1) {
579: if (defined($token->[4]) && ($metamode < 1)) {
580: $currentstring = $token->[4];
581: } else {
582: $currentstring = $token->[2];
583: }
584: }
585: }
586: # &Apache::lonxml::debug("nodefalt:$nodefault:");
587: if ($currentstring eq '' && $nodefault eq '') {
588: if ($target eq 'edit') {
589: #&Apache::lonxml::debug("doing default edit for $token->[1]");
590: if ($token->[0] eq 'S') {
591: $currentstring = &Apache::edit::tag_start($target,$token);
592: } elsif ($token->[0] eq 'E') {
593: $currentstring = &Apache::edit::tag_end($target,$token);
594: }
595: } elsif ($target eq 'modified') {
596: if ($token->[0] eq 'S') {
597: $currentstring = $token->[4];
598: $currentstring.=&Apache::edit::handle_insert();
599: } elsif ($token->[0] eq 'E') {
600: $currentstring = $token->[2];
601: $currentstring.=&Apache::edit::handle_insertafter($token->[1]);
602: } else {
603: $currentstring = $token->[2];
604: }
605: }
606: }
607: }
608: use strict 'refs';
609: }
610: return $currentstring;
611: }
612:
613: sub setup_globals {
614: my ($request,$target)=@_;
615: $Apache::lonxml::request=$request;
616: $Apache::lonxml::registered = 0;
617: @Apache::lonxml::htmlareafields=();
618: $errorcount=0;
619: $warningcount=0;
620: $Apache::lonxml::default_homework_loaded=0;
621: $Apache::lonxml::usestyle=1;
622: &init_counter();
623: @Apache::lonxml::pwd=();
624: @Apache::lonxml::extlinks=();
625: @Apache::lonxml::ssi_info=();
626: $Apache::lonxml::post_evaluate=1;
627: $Apache::lonxml::warnings_error_header='';
628: if ($target eq 'meta') {
629: $Apache::lonxml::redirection = 0;
630: $Apache::lonxml::metamode = 1;
631: $Apache::lonxml::evaluate = 1;
632: $Apache::lonxml::import = 0;
633: } elsif ($target eq 'answer') {
634: $Apache::lonxml::redirection = 0;
635: $Apache::lonxml::metamode = 1;
636: $Apache::lonxml::evaluate = 1;
637: $Apache::lonxml::import = 1;
638: } elsif ($target eq 'grade') {
639: &startredirection;
640: $Apache::lonxml::metamode = 0;
641: $Apache::lonxml::evaluate = 1;
642: $Apache::lonxml::import = 1;
643: } elsif ($target eq 'modified') {
644: $Apache::lonxml::redirection = 0;
645: $Apache::lonxml::metamode = 0;
646: $Apache::lonxml::evaluate = 0;
647: $Apache::lonxml::import = 0;
648: } elsif ($target eq 'edit') {
649: $Apache::lonxml::redirection = 0;
650: $Apache::lonxml::metamode = 0;
651: $Apache::lonxml::evaluate = 0;
652: $Apache::lonxml::import = 0;
653: } elsif ($target eq 'analyze') {
654: $Apache::lonxml::redirection = 0;
655: $Apache::lonxml::metamode = 0;
656: $Apache::lonxml::evaluate = 1;
657: $Apache::lonxml::import = 1;
658: } else {
659: $Apache::lonxml::redirection = 0;
660: $Apache::lonxml::metamode = 0;
661: $Apache::lonxml::evaluate = 1;
662: $Apache::lonxml::import = 1;
663: }
664: }
665:
666: sub init_safespace {
667: my ($target,$safeeval,$safehole,$safeinit) = @_;
668: $safeeval->permit("entereval");
669: $safeeval->permit(":base_math");
670: $safeeval->permit("sort");
671: $safeeval->permit("time");
672: $safeeval->deny("rand");
673: $safeeval->deny("srand");
674: $safeeval->deny(":base_io");
675: $safehole->wrap(\&Apache::scripttag::xmlparse,$safeeval,'&xmlparse');
676: $safehole->wrap(\&Apache::outputtags::multipart,$safeeval,'&multipart');
677: $safehole->wrap(\&Apache::lonnet::EXT,$safeeval,'&EXT');
678: $safehole->wrap(\&Apache::chemresponse::chem_standard_order,$safeeval,
679: '&chem_standard_order');
680: $safehole->wrap(\&Apache::response::check_status,$safeeval,'&check_status');
681:
682: $safehole->wrap(\&Math::Cephes::asin,$safeeval,'&asin');
683: $safehole->wrap(\&Math::Cephes::acos,$safeeval,'&acos');
684: $safehole->wrap(\&Math::Cephes::atan,$safeeval,'&atan');
685: $safehole->wrap(\&Math::Cephes::sinh,$safeeval,'&sinh');
686: $safehole->wrap(\&Math::Cephes::cosh,$safeeval,'&cosh');
687: $safehole->wrap(\&Math::Cephes::tanh,$safeeval,'&tanh');
688: $safehole->wrap(\&Math::Cephes::asinh,$safeeval,'&asinh');
689: $safehole->wrap(\&Math::Cephes::acosh,$safeeval,'&acosh');
690: $safehole->wrap(\&Math::Cephes::atanh,$safeeval,'&atanh');
691: $safehole->wrap(\&Math::Cephes::erf,$safeeval,'&erf');
692: $safehole->wrap(\&Math::Cephes::erfc,$safeeval,'&erfc');
693: $safehole->wrap(\&Math::Cephes::j0,$safeeval,'&j0');
694: $safehole->wrap(\&Math::Cephes::j1,$safeeval,'&j1');
695: $safehole->wrap(\&Math::Cephes::jn,$safeeval,'&jn');
696: $safehole->wrap(\&Math::Cephes::jv,$safeeval,'&jv');
697: $safehole->wrap(\&Math::Cephes::y0,$safeeval,'&y0');
698: $safehole->wrap(\&Math::Cephes::y1,$safeeval,'&y1');
699: $safehole->wrap(\&Math::Cephes::yn,$safeeval,'&yn');
700: $safehole->wrap(\&Math::Cephes::yv,$safeeval,'&yv');
701:
702: $safehole->wrap(\&Math::Cephes::bdtr ,$safeeval,'&bdtr' );
703: $safehole->wrap(\&Math::Cephes::bdtrc ,$safeeval,'&bdtrc' );
704: $safehole->wrap(\&Math::Cephes::bdtri ,$safeeval,'&bdtri' );
705: $safehole->wrap(\&Math::Cephes::btdtr ,$safeeval,'&btdtr' );
706: $safehole->wrap(\&Math::Cephes::chdtr ,$safeeval,'&chdtr' );
707: $safehole->wrap(\&Math::Cephes::chdtrc,$safeeval,'&chdtrc');
708: $safehole->wrap(\&Math::Cephes::chdtri,$safeeval,'&chdtri');
709: $safehole->wrap(\&Math::Cephes::fdtr ,$safeeval,'&fdtr' );
710: $safehole->wrap(\&Math::Cephes::fdtrc ,$safeeval,'&fdtrc' );
711: $safehole->wrap(\&Math::Cephes::fdtri ,$safeeval,'&fdtri' );
712: $safehole->wrap(\&Math::Cephes::gdtr ,$safeeval,'&gdtr' );
713: $safehole->wrap(\&Math::Cephes::gdtrc ,$safeeval,'&gdtrc' );
714: $safehole->wrap(\&Math::Cephes::nbdtr ,$safeeval,'&nbdtr' );
715: $safehole->wrap(\&Math::Cephes::nbdtrc,$safeeval,'&nbdtrc');
716: $safehole->wrap(\&Math::Cephes::nbdtri,$safeeval,'&nbdtri');
717: $safehole->wrap(\&Math::Cephes::ndtr ,$safeeval,'&ndtr' );
718: $safehole->wrap(\&Math::Cephes::ndtri ,$safeeval,'&ndtri' );
719: $safehole->wrap(\&Math::Cephes::pdtr ,$safeeval,'&pdtr' );
720: $safehole->wrap(\&Math::Cephes::pdtrc ,$safeeval,'&pdtrc' );
721: $safehole->wrap(\&Math::Cephes::pdtri ,$safeeval,'&pdtri' );
722: $safehole->wrap(\&Math::Cephes::stdtr ,$safeeval,'&stdtr' );
723: $safehole->wrap(\&Math::Cephes::stdtri,$safeeval,'&stdtri');
724:
725: # $safehole->wrap(\&Math::Cephes::new_fract,$safeeval,'&new_fract');
726: # $safehole->wrap(\&Math::Cephes::radd,$safeeval,'&radd');
727: # $safehole->wrap(\&Math::Cephes::rsub,$safeeval,'&rsub');
728: # $safehole->wrap(\&Math::Cephes::rmul,$safeeval,'&rmul');
729: # $safehole->wrap(\&Math::Cephes::rdiv,$safeeval,'&rdiv');
730: # $safehole->wrap(\&Math::Cephes::euclid,$safeeval,'&euclid');
731:
732: $safehole->wrap(\&Math::Random::random_beta,$safeeval,'&math_random_beta');
733: $safehole->wrap(\&Math::Random::random_chi_square,$safeeval,'&math_random_chi_square');
734: $safehole->wrap(\&Math::Random::random_exponential,$safeeval,'&math_random_exponential');
735: $safehole->wrap(\&Math::Random::random_f,$safeeval,'&math_random_f');
736: $safehole->wrap(\&Math::Random::random_gamma,$safeeval,'&math_random_gamma');
737: $safehole->wrap(\&Math::Random::random_multivariate_normal,$safeeval,'&math_random_multivariate_normal');
738: $safehole->wrap(\&Math::Random::random_multinomial,$safeeval,'&math_random_multinomial');
739: $safehole->wrap(\&Math::Random::random_noncentral_chi_square,$safeeval,'&math_random_noncentral_chi_square');
740: $safehole->wrap(\&Math::Random::random_noncentral_f,$safeeval,'&math_random_noncentral_f');
741: $safehole->wrap(\&Math::Random::random_normal,$safeeval,'&math_random_normal');
742: $safehole->wrap(\&Math::Random::random_permutation,$safeeval,'&math_random_permutation');
743: $safehole->wrap(\&Math::Random::random_permuted_index,$safeeval,'&math_random_permuted_index');
744: $safehole->wrap(\&Math::Random::random_uniform,$safeeval,'&math_random_uniform');
745: $safehole->wrap(\&Math::Random::random_poisson,$safeeval,'&math_random_poisson');
746: $safehole->wrap(\&Math::Random::random_uniform_integer,$safeeval,'&math_random_uniform_integer');
747: $safehole->wrap(\&Math::Random::random_negative_binomial,$safeeval,'&math_random_negative_binomial');
748: $safehole->wrap(\&Math::Random::random_binomial,$safeeval,'&math_random_binomial');
749: $safehole->wrap(\&Math::Random::random_seed_from_phrase,$safeeval,'&random_seed_from_phrase');
750: $safehole->wrap(\&Math::Random::random_set_seed_from_phrase,$safeeval,'&random_set_seed_from_phrase');
751: $safehole->wrap(\&Math::Random::random_get_seed,$safeeval,'&random_get_seed');
752: $safehole->wrap(\&Math::Random::random_set_seed,$safeeval,'&random_set_seed');
753: $safehole->wrap(\&Apache::lonxml::error,$safeeval,'&LONCAPA_INTERNAL_ERROR');
754: $safehole->wrap(\&Apache::lonxml::debug,$safeeval,'&LONCAPA_INTERNAL_DEBUG');
755: $safehole->wrap(\&Apache::caparesponse::get_sigrange,$safeeval,'&LONCAPA_INTERNAL_get_sigrange');
756:
757: #need to inspect this class of ops
758: # $safeeval->deny(":base_orig");
759: $safeeval->permit("require");
760: $safeinit .= ';$external::target="'.$target.'";';
761: &Apache::run::run($safeinit,$safeeval);
762: &initialize_rndseed($safeeval);
763: }
764:
765: sub initialize_rndseed {
766: my ($safeeval)=@_;
767: my $rndseed;
768: my ($symb,$courseid,$domain,$name) = &Apache::lonxml::whichuser();
769: $rndseed=&Apache::lonnet::rndseed($symb,$courseid,$domain,$name);
770: my $safeinit = '$external::randomseed="'.$rndseed.'";';
771: &Apache::lonxml::debug("Setting rndseed to $rndseed");
772: &Apache::run::run($safeinit,$safeeval);
773: }
774:
775: sub default_homework_load {
776: my ($safeeval)=@_;
777: &Apache::lonxml::debug('Loading default_homework');
778: my $default=&Apache::lonnet::getfile('/home/httpd/html/res/adm/includes/default_homework.lcpm');
779: if ($default eq -1) {
780: &Apache::lonxml::error("<b>Unable to find <i>default_homework.lcpm</i></b>");
781: } else {
782: &Apache::run::run($default,$safeeval);
783: $Apache::lonxml::default_homework_loaded=1;
784: }
785: }
786:
787: {
788: my $alarm_depth;
789: sub init_alarm {
790: alarm(0);
791: $alarm_depth=0;
792: }
793:
794: sub start_alarm {
795: if ($alarm_depth<1) {
796: my $old=alarm($Apache::lonnet::perlvar{'lonScriptTimeout'});
797: if ($old) {
798: &Apache::lonxml::error("Cancelled an alarm of $old, this shouldn't occur.");
799: }
800: }
801: $alarm_depth++;
802: }
803:
804: sub end_alarm {
805: $alarm_depth--;
806: if ($alarm_depth<1) { alarm(0); }
807: }
808: }
809: my $metamode_was;
810: sub startredirection {
811: if (!$Apache::lonxml::redirection) {
812: $metamode_was=$Apache::lonxml::metamode;
813: }
814: $Apache::lonxml::metamode=0;
815: $Apache::lonxml::redirection++;
816: push (@Apache::lonxml::outputstack, '');
817: }
818:
819: sub endredirection {
820: if (!$Apache::lonxml::redirection) {
821: &Apache::lonxml::error("Endredirection was called before a startredirection, perhaps you have unbalanced tags. Some debugging information:".join ":",caller);
822: return '';
823: }
824: $Apache::lonxml::redirection--;
825: if (!$Apache::lonxml::redirection) {
826: $Apache::lonxml::metamode=$metamode_was;
827: }
828: pop @Apache::lonxml::outputstack;
829: }
830:
831: sub end_tag {
832: my ($tagstack,$parstack,$token)=@_;
833: pop(@$tagstack);
834: pop(@$parstack);
835: &decreasedepth($token);
836: }
837:
838: sub initdepth {
839: @Apache::lonxml::depthcounter=();
840: $Apache::lonxml::depth=-1;
841: $Apache::lonxml::olddepth=-1;
842: }
843:
844: my @timers;
845: my $lasttime;
846: sub increasedepth {
847: my ($token) = @_;
848: $Apache::lonxml::depth++;
849: $Apache::lonxml::depthcounter[$Apache::lonxml::depth]++;
850: if ($Apache::lonxml::depthcounter[$Apache::lonxml::depth]==1) {
851: $Apache::lonxml::olddepth=$Apache::lonxml::depth;
852: }
853: my $time;
854: if ($Apache::lonxml::debug eq "1") {
855: push(@timers,[&gettimeofday()]);
856: $time=&tv_interval($lasttime);
857: $lasttime=[&gettimeofday()];
858: }
859: my $spacing=' 'x($Apache::lonxml::depth-1);
860: my $curdepth=join('_',@Apache::lonxml::depthcounter);
861: &Apache::lonxml::debug("s$spacing$Apache::lonxml::depth : $Apache::lonxml::olddepth : $curdepth : $token->[1] : $time : \n");
862: #print "<br />s $Apache::lonxml::depth : $Apache::lonxml::olddepth : $curdepth : $token->[1]\n";
863: }
864:
865: sub decreasedepth {
866: my ($token) = @_;
867: $Apache::lonxml::depth--;
868: if ($Apache::lonxml::depth<$Apache::lonxml::olddepth-1) {
869: $#Apache::lonxml::depthcounter--;
870: $Apache::lonxml::olddepth=$Apache::lonxml::depth+1;
871: }
872: if ( $Apache::lonxml::depth < -1) {
873: &Apache::lonxml::warning(&mt("Missing tags, unable to properly run file."));
874: $Apache::lonxml::depth='-1';
875: }
876: my ($timer,$time);
877: if ($Apache::lonxml::debug eq "1") {
878: $timer=pop(@timers);
879: $time=&tv_interval($lasttime);
880: $lasttime=[&gettimeofday()];
881: }
882: my $spacing=' 'x$Apache::lonxml::depth;
883: my $curdepth=join('_',@Apache::lonxml::depthcounter);
884: &Apache::lonxml::debug("e$spacing$Apache::lonxml::depth : $Apache::lonxml::olddepth : $curdepth : $token->[1] : $time : ".&tv_interval($timer)."\n");
885: #print "<br />e $Apache::lonxml::depth : $Apache::lonxml::olddepth : $token->[1] : $curdepth\n";
886: }
887:
888: sub get_all_text_unbalanced {
889: #there is a copy of this in lonpublisher.pm
890: my($tag,$pars)= @_;
891: my $token;
892: my $result='';
893: $tag='<'.$tag.'>';
894: while ($token = $$pars[-1]->get_token) {
895: if (($token->[0] eq 'T')||($token->[0] eq 'C')||($token->[0] eq 'D')) {
896: if ($token->[2]) {
897: $result.='<![CDATA['.$token->[1].']]>';
898: } else {
899: $result.=$token->[1];
900: }
901: } elsif ($token->[0] eq 'PI') {
902: $result.=$token->[2];
903: } elsif ($token->[0] eq 'S') {
904: $result.=$token->[4];
905: } elsif ($token->[0] eq 'E') {
906: $result.=$token->[2];
907: }
908: if ($result =~ /\Q$tag\E/is) {
909: ($result,my $redo)=$result =~ /(.*)\Q$tag\E(.*)/is;
910: #&Apache::lonxml::debug('Got a winner with leftovers ::'.$2);
911: #&Apache::lonxml::debug('Result is :'.$1);
912: $redo=$tag.$redo;
913: &Apache::lonxml::newparser($pars,\$redo);
914: last;
915: }
916: }
917: return $result
918: }
919:
920: sub increment_counter {
921: my ($increment) = @_;
922: if (defined($increment) && $increment gt 0) {
923: $Apache::lonxml::counter+=$increment;
924: } else {
925: $Apache::lonxml::counter++;
926: }
927: $Apache::lonxml::counter_changed=1;
928: }
929:
930: sub init_counter {
931: if (defined($env{'form.counter'})) {
932: $Apache::lonxml::counter=$env{'form.counter'};
933: $Apache::lonxml::counter_changed=0;
934: } else {
935: $Apache::lonxml::counter=1;
936: $Apache::lonxml::counter_changed=1;
937: }
938: }
939:
940: sub store_counter {
941: &Apache::lonnet::appenv(('form.counter' => $Apache::lonxml::counter));
942: return '';
943: }
944:
945: sub get_all_text {
946: my($tag,$pars,$style)= @_;
947: my $gotfullstack=1;
948: if (ref($pars) ne 'ARRAY') {
949: $gotfullstack=0;
950: $pars=[$pars];
951: }
952: if (ref($style) ne 'HASH') {
953: $style={};
954: }
955: my $depth=0;
956: my $token;
957: my $result='';
958: if ( $tag =~ m:^/: ) {
959: my $tag=substr($tag,1);
960: #&Apache::lonxml::debug("have:$tag:");
961: my $top_empty=0;
962: while (($depth >=0) && ($#$pars > -1) && (!$top_empty)) {
963: while (($depth >=0) && ($token = $$pars[-1]->get_token)) {
964: #&Apache::lonxml::debug("e token:$token->[0]:$depth:$token->[1]:".$#$pars.":".$#Apache::lonxml::pwd);
965: if (($token->[0] eq 'T')||($token->[0] eq 'C')||($token->[0] eq 'D')) {
966: if ($token->[2]) {
967: $result.='<![CDATA['.$token->[1].']]>';
968: } else {
969: $result.=$token->[1];
970: }
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: if ($token->[2]) {
1023: $result.='<![CDATA['.$token->[1].']]>';
1024: } else {
1025: $result.=$token->[1];
1026: }
1027: } elsif ($token->[0] eq 'PI') {
1028: $result.=$token->[2];
1029: } elsif ($token->[0] eq 'S') {
1030: if ( $token->[1] =~ /^\Q$tag\E$/i) {
1031: $$pars[-1]->unget_token($token); last;
1032: } else {
1033: $result.=$token->[4];
1034: }
1035: if ($token->[1] =~ /^LONCAPA_INTERNAL_TURN_STYLE_ON$/) { $Apache::lonxml::usestyle=1; }
1036: if ($token->[1] =~ /^LONCAPA_INTERNAL_TURN_STYLE_OFF$/) { $Apache::lonxml::usestyle=0; }
1037: } elsif ($token->[0] eq 'E') {
1038: $result.=$token->[2];
1039: }
1040: }
1041: if (($#$pars > 0) ) {
1042: pop(@$pars);
1043: pop(@Apache::lonxml::pwd);
1044: } else { last; }
1045: }
1046: }
1047: #&Apache::lonxml::debug("Exit:$result:");
1048: return $result
1049: }
1050:
1051: sub newparser {
1052: my ($parser,$contentref,$dir) = @_;
1053: push (@$parser,HTML::LCParser->new($contentref));
1054: $$parser[-1]->xml_mode(1);
1055: $$parser[-1]->marked_sections(1);
1056: if ( $dir eq '' ) {
1057: push (@Apache::lonxml::pwd, $Apache::lonxml::pwd[$#Apache::lonxml::pwd]);
1058: } else {
1059: push (@Apache::lonxml::pwd, $dir);
1060: }
1061: }
1062:
1063: sub parstring {
1064: my ($token) = @_;
1065: my $temp='';
1066: foreach (@{$token->[3]}) {
1067: unless ($_=~/\W/) {
1068: my $val=$token->[2]->{$_};
1069: $val =~ s/([\%\@\\\"\'])/\\$1/g;
1070: $val =~ s/(\$[^{a-zA-Z_])/\\$1/g;
1071: $val =~ s/(\$)$/\\$1/;
1072: #if ($val =~ m/^[\%\@]/) { $val="\\".$val; }
1073: $temp .= "my \$$_=\"$val\";";
1074: }
1075: }
1076: return $temp;
1077: }
1078:
1079: sub writeallows {
1080: unless ($#extlinks>=0) { return; }
1081: my $thisurl = &Apache::lonnet::clutter(shift);
1082: if ($env{'httpref.'.$thisurl}) {
1083: $thisurl=$env{'httpref.'.$thisurl};
1084: }
1085: my $thisdir=$thisurl;
1086: $thisdir=~s/\/[^\/]+$//;
1087: my %httpref=();
1088: foreach (@extlinks) {
1089: $httpref{'httpref.'.
1090: &Apache::lonnet::hreflocation($thisdir,$_)}=$thisurl;
1091: }
1092: @extlinks=();
1093: &Apache::lonnet::appenv(%httpref);
1094: }
1095:
1096: sub register_ssi {
1097: my ($url,%form)=@_;
1098: push (@Apache::lonxml::ssi_info,{'url'=>$url,'form'=>\%form});
1099: return '';
1100: }
1101:
1102: sub do_registered_ssi {
1103: foreach my $info (@Apache::lonxml::ssi_info) {
1104: my %form=%{ $info->{'form'}};
1105: my $url=$info->{'url'};
1106: &Apache::lonnet::ssi($url,%form);
1107: }
1108: }
1109: #
1110: # Afterburner handles anchors, highlights and links
1111: #
1112: sub afterburn {
1113: my $result=shift;
1114: &Apache::loncommon::get_unprocessed_cgi($ENV{'QUERY_STRING'},
1115: ['highlight','anchor','link']);
1116: if ($env{'form.highlight'}) {
1117: foreach (split(/\,/,$env{'form.highlight'})) {
1118: my $anchorname=$_;
1119: my $matchthis=$anchorname;
1120: $matchthis=~s/\_+/\\s\+/g;
1121: $result=~s/(\Q$matchthis\E)/\<font color=\"red\"\>$1\<\/font\>/gs;
1122: }
1123: }
1124: if ($env{'form.link'}) {
1125: foreach (split(/\,/,$env{'form.link'})) {
1126: my ($anchorname,$linkurl)=split(/\>/,$_);
1127: my $matchthis=$anchorname;
1128: $matchthis=~s/\_+/\\s\+/g;
1129: $result=~s/(\Q$matchthis\E)/\<a href=\"$linkurl\"\>$1\<\/a\>/gs;
1130: }
1131: }
1132: if ($env{'form.anchor'}) {
1133: my $anchorname=$env{'form.anchor'};
1134: my $matchthis=$anchorname;
1135: $matchthis=~s/\_+/\\s\+/g;
1136: $result=~s/(\Q$matchthis\E)/\<a name=\"$anchorname\"\>$1\<\/a\>/s;
1137: $result.=(<<"ENDSCRIPT");
1138: <script type="text/javascript">
1139: document.location.hash='$anchorname';
1140: </script>
1141: ENDSCRIPT
1142: }
1143: return $result;
1144: }
1145:
1146: sub storefile {
1147: my ($file,$contents)=@_;
1148: &Apache::lonnet::correct_line_ends(\$contents);
1149: if (my $fh=Apache::File->new('>'.$file)) {
1150: print $fh $contents;
1151: $fh->close();
1152: return 1;
1153: } else {
1154: &warning("Unable to save file $file");
1155: return 0;
1156: }
1157: }
1158:
1159: sub createnewhtml {
1160: my $title=&mt('Title of document goes here');
1161: my $body=&mt('Body of document goes here');
1162: my $filecontents=(<<SIMPLECONTENT);
1163: <html>
1164: <head>
1165: <title>$title</title>
1166: </head>
1167: <body bgcolor="#FFFFFF">
1168: $body
1169: </body>
1170: </html>
1171: SIMPLECONTENT
1172: return $filecontents;
1173: }
1174:
1175: sub createnewsty {
1176: my $filecontents=(<<SIMPLECONTENT);
1177: <definetag name="">
1178: <render>
1179: <web></web>
1180: <tex></tex>
1181: </render>
1182: </definetag>
1183: SIMPLECONTENT
1184: return $filecontents;
1185: }
1186:
1187:
1188: sub inserteditinfo {
1189: my ($result,$filecontents,$filetype)=@_;
1190: $filecontents = &HTML::Entities::encode($filecontents,'<>&"');
1191: # my $editheader='<a href="#editsection">Edit below</a><hr />';
1192: my $xml_help = '';
1193: my $initialize='';
1194: if ($filetype eq 'html') {
1195: my $addbuttons=&Apache::lonhtmlcommon::htmlareaaddbuttons();
1196: $initialize=&Apache::lonhtmlcommon::htmlareaheaders().
1197: &Apache::lonhtmlcommon::spellheader();
1198: if (!&Apache::lonhtmlcommon::htmlareablocked() &&
1199: &Apache::lonhtmlcommon::htmlareabrowser()) {
1200: $initialize.=(<<FULLPAGE);
1201: <script type="text/javascript">
1202: $addbuttons
1203:
1204: HTMLArea.loadPlugin("FullPage");
1205:
1206: function initDocument() {
1207: var editor=new HTMLArea("filecont",config);
1208: editor.registerPlugin(FullPage);
1209: editor.generate();
1210: }
1211: </script>
1212: FULLPAGE
1213: } else {
1214: $initialize.=(<<FULLPAGE);
1215: <script type="text/javascript">
1216: $addbuttons
1217: function initDocument() {
1218: }
1219: </script>
1220: FULLPAGE
1221: }
1222: $result=~s/\<body([^\>]*)\>/\<body onload="initDocument()" $1\>/i;
1223: $xml_help=&Apache::loncommon::helpLatexCheatsheet();
1224: }
1225: my $cleanbut = '';
1226:
1227: my $titledisplay=&display_title();
1228: my %lt=&Apache::lonlocal::texthash('st' => 'Save this',
1229: 'vi' => 'View',
1230: 'ed' => 'Edit');
1231: my $buttons=(<<BUTTONS);
1232: $cleanbut
1233: <input type="submit" name="savethisfile" accesskey="s" value="$lt{'st'}" />
1234: <input type="submit" name="viewmode" accesskey="v" value="$lt{'vi'}" />
1235: BUTTONS
1236: $buttons.=&Apache::lonhtmlcommon::spelllink('xmledit','filecont');
1237: $buttons.=&Apache::lonhtmlcommon::htmlareaselectactive('filecont');
1238: my $editfooter=(<<ENDFOOTER);
1239: $initialize
1240: <hr />
1241: <a name="editsection" />
1242: <form method="post" name="xmledit">
1243: $xml_help
1244: <input type="hidden" name="editmode" value="$lt{'ed'}" />
1245: $buttons<br />
1246: <textarea style="width:100%" cols="80" rows="44" name="filecont" id="filecont">$filecontents</textarea>
1247: <br />$buttons
1248: <br />
1249: </form>
1250: $titledisplay
1251: </body>
1252: ENDFOOTER
1253: # $result=~s/(\<body[^\>]*\>)/$1$editheader/is;
1254: $result=~s/(\<\/body\>)/$editfooter/is;
1255: return $result;
1256: }
1257:
1258: sub get_target {
1259: my $viewgrades=&Apache::lonnet::allowed('vgr',$env{'request.course.id'});
1260: if ( $env{'request.state'} eq 'published') {
1261: if ( defined($env{'form.grade_target'})
1262: && ($viewgrades == 'F' )) {
1263: return ($env{'form.grade_target'});
1264: } elsif (defined($env{'form.grade_target'})) {
1265: if (($env{'form.grade_target'} eq 'web') ||
1266: ($env{'form.grade_target'} eq 'tex') ) {
1267: return $env{'form.grade_target'}
1268: } else {
1269: return 'web';
1270: }
1271: } else {
1272: return 'web';
1273: }
1274: } elsif ($env{'request.state'} eq 'construct') {
1275: if ( defined($env{'form.grade_target'})) {
1276: return ($env{'form.grade_target'});
1277: } else {
1278: return 'web';
1279: }
1280: } else {
1281: return 'web';
1282: }
1283: }
1284:
1285: sub handler {
1286: my $request=shift;
1287:
1288: my $target=&get_target();
1289:
1290: $Apache::lonxml::debug=$env{'user.debug'};
1291:
1292: &Apache::loncommon::content_type($request,'text/html');
1293: &Apache::loncommon::no_cache($request);
1294: if ($env{'request.state'} eq 'published') {
1295: $request->set_last_modified(&Apache::lonnet::metadata($request->uri,
1296: 'lastrevisiondate'));
1297: }
1298: $request->send_http_header;
1299:
1300: return OK if $request->header_only;
1301:
1302:
1303: my $file=&Apache::lonnet::filelocation("",$request->uri);
1304: my $filetype;
1305: if ($file =~ /\.sty$/) {
1306: $filetype='sty';
1307: } else {
1308: $filetype='html';
1309: }
1310: #
1311: # Edit action? Save file.
1312: #
1313: unless ($env{'request.state'} eq 'published') {
1314: if ($env{'form.savethisfile'}) {
1315: if (&storefile($file,$env{'form.filecont'})) {
1316: &Apache::lonxml::info("<font COLOR=\"#0000FF\">".
1317: &mt('Updated').": ".
1318: &Apache::lonlocal::locallocaltime(time).
1319: " </font>");
1320: }
1321: }
1322: }
1323: my %mystyle;
1324: my $result = '';
1325: my $filecontents=&Apache::lonnet::getfile($file);
1326: if ($filecontents eq -1) {
1327: my $bodytag=&Apache::loncommon::bodytag('File Error');
1328: my $fnf=&mt('File not found');
1329: $result=(<<ENDNOTFOUND);
1330: <html>
1331: <head>
1332: <title>$fnf</title>
1333: </head>
1334: $bodytag
1335: <b>$fnf: $file</b>
1336: </body>
1337: </html>
1338: ENDNOTFOUND
1339: $filecontents='';
1340: if ($env{'request.state'} ne 'published') {
1341: if ($filetype eq 'sty') {
1342: $filecontents=&createnewsty();
1343: } else {
1344: $filecontents=&createnewhtml();
1345: }
1346: $env{'form.editmode'}='Edit'; #force edit mode
1347: }
1348: } else {
1349: unless ($env{'request.state'} eq 'published') {
1350: if ($filecontents=~/BEGIN LON-CAPA Internal/) {
1351: &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.'));
1352: }
1353: #
1354: # we are in construction space, see if edit mode forced
1355: &Apache::loncommon::get_unprocessed_cgi
1356: ($ENV{'QUERY_STRING'},['editmode']);
1357: }
1358: if (!$env{'form.editmode'} || $env{'form.viewmode'}) {
1359: $result = &Apache::lonxml::xmlparse($request,$target,$filecontents,
1360: '',%mystyle);
1361: undef($Apache::lonhomework::parsing_a_task);
1362: }
1363: }
1364:
1365: #
1366: # Edit action? Insert editing commands
1367: #
1368: unless ($env{'request.state'} eq 'published') {
1369: if ($env{'form.editmode'} && (!($env{'form.viewmode'}))) {
1370: my $displayfile=$request->uri;
1371: $displayfile=~s/^\/[^\/]*//;
1372: my $bodytag='<body bgcolor="#FFFFFF">';
1373: if ($env{'environment.remote'} eq 'off') {
1374: $bodytag=&Apache::loncommon::bodytag();
1375: }
1376: $result='<html>'.$bodytag.
1377: &Apache::lonxml::message_location().'<h3>'.
1378: $displayfile.
1379: '</h3></body></html>';
1380: $result=&inserteditinfo($result,$filecontents,$filetype);
1381: }
1382: }
1383: if ($filetype eq 'html') { writeallows($request->uri); }
1384:
1385:
1386: &Apache::lonxml::add_messages(\$result);
1387: $request->print($result);
1388:
1389: return OK;
1390: }
1391:
1392: sub display_title {
1393: my $result;
1394: if ($env{'request.state'} eq 'construct') {
1395: my $title=&Apache::lonnet::gettitle();
1396: if (!defined($title) || $title eq '') {
1397: $title = $env{'request.filename'};
1398: $title = substr($title, rindex($title, '/') + 1);
1399: }
1400: $result = "<script type='text/javascript'>top.document.title = '$title - LON-CAPA Construction Space';</script>";
1401: }
1402: return $result;
1403: }
1404:
1405: sub debug {
1406: if ($Apache::lonxml::debug eq "1") {
1407: $|=1;
1408: my $request=$Apache::lonxml::request;
1409: if (!$request) { $request=Apache->request; }
1410: $request->print('<font size="-2"><pre>DEBUG:'.&HTML::Entities::encode($_[0],'<>&"')."</pre></font>\n");
1411: #&Apache::lonnet::logthis($_[0]);
1412: }
1413: }
1414:
1415: sub show_error_warn_msg {
1416: if ($env{'request.filename'} eq '/home/httpd/html/res/lib/templates/simpleproblem.problem' &&
1417: &Apache::lonnet::allowed('mdc',$env{'request.course.id'})) {
1418: return 1;
1419: }
1420: return (($Apache::lonxml::debug eq 1) ||
1421: ($env{'request.state'} eq 'construct') ||
1422: ($Apache::lonhomework::browse eq 'F'
1423: &&
1424: $env{'form.show_errors'} eq 'on'));
1425: }
1426:
1427: sub error {
1428: $errorcount++;
1429: if ( &show_error_warn_msg() ) {
1430: # If printing in construction space, put the error inside <pre></pre>
1431: push(@Apache::lonxml::error_messages,
1432: $Apache::lonxml::warnings_error_header.
1433: "<b>ERROR:</b>".join("<br />\n",@_)."<br />\n");
1434: $Apache::lonxml::warnings_error_header='';
1435: } else {
1436: my $errormsg;
1437: my ($symb)=&Apache::lonnet::symbread();
1438: if ( !$symb ) {
1439: #public or browsers
1440: $errormsg=&mt("An error occured while processing this resource. The author has been notified.");
1441: }
1442: #notify author
1443: &Apache::lonmsg::author_res_msg($env{'request.filename'},join('<br />',@_));
1444: #notify course
1445: if ( $symb && $env{'request.course.id'} ) {
1446: my $cnum=$env{'course.'.$env{'request.course.id'}.'.num'};
1447: my $cdom=$env{'course.'.$env{'request.course.id'}.'.domain'};
1448: my (undef,%users)=&Apache::lonfeedback::decide_receiver(undef,0,1,1,1);
1449: my $declutter=&Apache::lonnet::declutter($env{'request.filename'});
1450: my @userlist;
1451: foreach (keys %users) {
1452: my ($user,$domain) = split(/:/, $_);
1453: push(@userlist,"$user\@$domain");
1454: my $key=$declutter.'_'.$user.'_'.$domain;
1455: my %lastnotified=&Apache::lonnet::get('nohist_xmlerrornotifications',
1456: [$key],
1457: $cdom,$cnum);
1458: my $now=time;
1459: if ($now-$lastnotified{$key}>86400) {
1460: &Apache::lonmsg::user_normal_msg($user,$domain,
1461: "Error [$declutter]",join('<br />',@_));
1462: &Apache::lonnet::put('nohist_xmlerrornotifications',
1463: {$key => $now},
1464: $cdom,$cnum);
1465: }
1466: }
1467: if ($env{'request.role.adv'}) {
1468: $errormsg=&mt("An error occured while processing this resource. The course personnel ([_1]) and the author have been notified.",join(', ',@userlist));
1469: } else {
1470: $errormsg=&mt("An error occured while processing this resource. The instructor has been notified.");
1471: }
1472: }
1473: push(@Apache::lonxml::error_messages,"<b>$errormsg</b> <br />");
1474: }
1475: }
1476:
1477: sub warning {
1478: $warningcount++;
1479:
1480: if ($env{'form.grade_target'} ne 'tex') {
1481: if ( &show_error_warn_msg() ) {
1482: push(@Apache::lonxml::warning_messages,
1483: $Apache::lonxml::warnings_error_header.
1484: "<b>W</b>ARNING<b>:</b>".join('<br />',@_)."<br />\n");
1485: $Apache::lonxml::warnings_error_header='';
1486: }
1487: }
1488: }
1489:
1490: sub info {
1491: if ($env{'form.grade_target'} ne 'tex'
1492: && $env{'request.state'} eq 'construct') {
1493: push(@Apache::lonxml::info_messages,join('<br />',@_)."<br />\n");
1494: }
1495: }
1496:
1497: sub message_location {
1498: return '__LONCAPA_INTERNAL_MESSAGE_LOCATION__';
1499: }
1500:
1501: sub add_messages {
1502: my ($msg)=@_;
1503: my $result=join(' ',
1504: @Apache::lonxml::info_messages,
1505: @Apache::lonxml::error_messages,
1506: @Apache::lonxml::warning_messages);
1507: undef(@Apache::lonxml::info_messages);
1508: undef(@Apache::lonxml::error_messages);
1509: undef(@Apache::lonxml::warning_messages);
1510: $$msg=~s/__LONCAPA_INTERNAL_MESSAGE_LOCATION__/$result/;
1511: $$msg=~s/__LONCAPA_INTERNAL_MESSAGE_LOCATION__//g;
1512: }
1513:
1514: sub get_param {
1515: my ($param,$parstack,$safeeval,$context,$case_insensitive) = @_;
1516: if ( ! $context ) { $context = -1; }
1517: my $args ='';
1518: if ( $#$parstack > (-2-$context) ) { $args=$$parstack[$context]; }
1519: if ( ! $Apache::lonxml::usestyle ) {
1520: $args=$Apache::lonxml::style_values.$args;
1521: }
1522: if ( ! $args ) { return undef; }
1523: if ( $case_insensitive ) {
1524: if ($args =~ s/(my \$)(\Q$param\E)(=\")/$1.lc($2).$3/ei) {
1525: return &Apache::run::run("{$args;".'return $'.$param.'}',
1526: $safeeval); #'
1527: } else {
1528: return undef;
1529: }
1530: } else {
1531: if ( $args =~ /my \$\Q$param\E=\"/ ) {
1532: return &Apache::run::run("{$args;".'return $'.$param.'}',
1533: $safeeval); #'
1534: } else {
1535: return undef;
1536: }
1537: }
1538: }
1539:
1540: sub get_param_var {
1541: my ($param,$parstack,$safeeval,$context,$case_insensitive) = @_;
1542: if ( ! $context ) { $context = -1; }
1543: my $args ='';
1544: if ( $#$parstack > (-2-$context) ) { $args=$$parstack[$context]; }
1545: if ( ! $Apache::lonxml::usestyle ) {
1546: $args=$Apache::lonxml::style_values.$args;
1547: }
1548: &Apache::lonxml::debug("Args are $args param is $param");
1549: if ($case_insensitive) {
1550: if (! ($args=~s/(my \$)(\Q$param\E)(=\")/$1.lc($2).$3/ei)) {
1551: return undef;
1552: }
1553: } elsif ( $args !~ /my \$\Q$param\E=\"/ ) { return undef; }
1554: my $value=&Apache::run::run("{$args;".'return $'.$param.'}',$safeeval); #'
1555: &Apache::lonxml::debug("first run is $value");
1556: if ($value =~ /^[\$\@\%][a-zA-Z_]\w*$/) {
1557: &Apache::lonxml::debug("doing second");
1558: my @result=&Apache::run::run("return $value",$safeeval,1);
1559: if (!defined($result[0])) {
1560: return $value
1561: } else {
1562: if (wantarray) { return @result; } else { return $result[0]; }
1563: }
1564: } else {
1565: return $value;
1566: }
1567: }
1568:
1569: sub register_insert {
1570: my @data = split /\n/, &Apache::lonnet::getfile('/home/httpd/lonTabs/insertlist.tab');
1571: my $i;
1572: my $tagnum=0;
1573: my @order;
1574: for ($i=0;$i < $#data; $i++) {
1575: my $line = $data[$i];
1576: if ( $line =~ /^\#/ || $line =~ /^\s*\n/) { next; }
1577: if ( $line =~ /TABLE/ ) { last; }
1578: my ($tag,$descrip,$color,$function,$show,$helpfile,$helpdesc) = split(/,/, $line);
1579: if ($tag) {
1580: $insertlist{"$tagnum.tag"} = $tag;
1581: $insertlist{"$tagnum.description"} = $descrip;
1582: $insertlist{"$tagnum.color"} = $color;
1583: $insertlist{"$tagnum.function"} = $function;
1584: if (!defined($show)) { $show='yes'; }
1585: $insertlist{"$tagnum.show"}= $show;
1586: $insertlist{"$tagnum.helpfile"} = $helpfile;
1587: $insertlist{"$tagnum.helpdesc"} = $helpdesc;
1588: $insertlist{"$tag.num"}=$tagnum;
1589: $tagnum++;
1590: }
1591: }
1592: $i++; #skipping TABLE line
1593: $tagnum = 0;
1594: for (;$i < $#data;$i++) {
1595: my $line = $data[$i];
1596: my ($mnemonic,@which) = split(/ +/,$line);
1597: my $tag = $insertlist{"$tagnum.tag"};
1598: for (my $j=0;$j <=$#which;$j++) {
1599: if ( $which[$j] eq 'Y' ) {
1600: if ($insertlist{"$j.show"} ne 'no') {
1601: push(@{ $insertlist{"$tag.which"} },$j);
1602: }
1603: }
1604: }
1605: $tagnum++;
1606: }
1607: }
1608:
1609: sub description {
1610: my ($token)=@_;
1611: my $tagnum;
1612: my $tag=$token->[1];
1613: foreach my $namespace (reverse @Apache::lonxml::namespace) {
1614: my $testtag=$namespace.'::'.$tag;
1615: $tagnum=$insertlist{"$testtag.num"};
1616: if (defined($tagnum)) { last; }
1617: }
1618: if (!defined ($tagnum)) { $tagnum=$Apache::lonxml::insertlist{"$tag.num"}; }
1619: return $insertlist{$tagnum.'.description'};
1620: }
1621:
1622: # Returns a list containing the help file, and the description
1623: sub helpinfo {
1624: my ($token)=@_;
1625: my $tagnum;
1626: my $tag=$token->[1];
1627: foreach my $namespace (reverse @Apache::lonxml::namespace) {
1628: my $testtag=$namespace.'::'.$tag;
1629: $tagnum=$insertlist{"$testtag.num"};
1630: if (defined($tagnum)) { last; }
1631: }
1632: if (!defined ($tagnum)) { $tagnum=$Apache::lonxml::insertlist{"$tag.num"}; }
1633: return ($insertlist{$tagnum.'.helpfile'}, $insertlist{$tagnum.'.helpdesc'});
1634: }
1635:
1636: # ----------------------------------------------------------------- whichuser
1637: # returns a list of $symb, $courseid, $domain, $name that is correct for
1638: # calls to lonnet functions for this setup.
1639: # - looks for form.grade_ parameters
1640: sub whichuser {
1641: my ($passedsymb)=@_;
1642: my ($symb,$courseid,$domain,$name,$publicuser);
1643: if (defined($env{'form.grade_symb'})) {
1644: my ($tmp_courseid)=
1645: &Apache::loncommon::get_env_multiple('form.grade_courseid');
1646: my $allowed=&Apache::lonnet::allowed('vgr',$tmp_courseid);
1647: if (!$allowed &&
1648: exists($env{'request.course.sec'}) &&
1649: $env{'request.course.sec'} !~ /^\s*$/) {
1650: $allowed=&Apache::lonnet::allowed('vgr',$tmp_courseid.
1651: '/'.$env{'request.course.sec'});
1652: }
1653: if ($allowed) {
1654: ($symb)=&Apache::loncommon::get_env_multiple('form.grade_symb');
1655: $courseid=$tmp_courseid;
1656: ($domain)=&Apache::loncommon::get_env_multiple('form.grade_domain');
1657: ($name)=&Apache::loncommon::get_env_multiple('form.grade_username');
1658: return ($symb,$courseid,$domain,$name,$publicuser);
1659: }
1660: }
1661: if (!$passedsymb) {
1662: $symb=&Apache::lonnet::symbread();
1663: } else {
1664: $symb=$passedsymb;
1665: }
1666: $courseid=$env{'request.course.id'};
1667: $domain=$env{'user.domain'};
1668: $name=$env{'user.name'};
1669: if ($name eq 'public' && $domain eq 'public') {
1670: if (!defined($env{'form.username'})) {
1671: $env{'form.username'}.=time.rand(10000000);
1672: }
1673: $name.=$env{'form.username'};
1674: }
1675: return ($symb,$courseid,$domain,$name,$publicuser);
1676: }
1677:
1678: 1;
1679: __END__
1680:
1681:
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