1: # The LearningOnline Network with CAPA
2: # XML Parser Module
3: #
4: # $Id: lonxml.pm,v 1.355 2005/01/30 23:31:12 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 $output='';
153: @htmlareafields=();
154: if ($ENV{'browser.mathml'}) {
155: $output='<?xml version="1.0"?>'
156: .'<?xml-stylesheet type="text/css" href="/adm/MathML/mathml.css"?>'
157: .'<!DOCTYPE html SYSTEM "/adm/MathML/mathml.dtd" '
158: .'[<!ENTITY mathns "http://www.w3.org/1998/Math/MathML">]>'
159: .'<html xmlns:math="http://www.w3.org/1998/Math/MathML" '
160: .'xmlns="http://www.w3.org/TR/REC-html40">';
161: } else {
162: $output='<!DOCTYPE html PUBLIC "-//W3C//DTD XHTML 1.0 Transitional//EN" "http://www.w3.org/TR/xhtml1/DTD/xhtml1-transitional.dtd">
163: <html>';
164: }
165: return $output;
166: }
167:
168: sub xmlend {
169: my ($target,$parser)=@_;
170: my $mode='xml';
171: my $status='OPEN';
172: if ($Apache::lonhomework::parsing_a_problem) {
173: $mode='problem';
174: $status=$Apache::inputtags::status[-1];
175: }
176: my $discussion=&Apache::lonfeedback::list_discussion($mode,$status);
177: if ($target eq 'tex') {
178: $discussion.='<tex>\keephidden{ENDOFPROBLEM}\vskip 0.5mm\noindent\makebox[\textwidth/$number_of_columns][b]{\hrulefill}\end{document}</tex>';
179: &Apache::lonxml::newparser($parser,\$discussion,'');
180: return '';
181: } else {
182: return $discussion.'</html>';
183: }
184: }
185:
186: sub tokeninputfield {
187: my $defhost=$Apache::lonnet::perlvar{'lonHostID'};
188: $defhost=~tr/a-z/A-Z/;
189: return (<<ENDINPUTFIELD)
190: <script type="text/javascript">
191: function updatetoken() {
192: var comp=new Array;
193: var barcode=unescape(document.tokeninput.barcode.value);
194: comp=barcode.split('*');
195: if (typeof(comp[0])!="undefined") {
196: document.tokeninput.codeone.value=comp[0];
197: }
198: if (typeof(comp[1])!="undefined") {
199: document.tokeninput.codetwo.value=comp[1];
200: }
201: if (typeof(comp[2])!="undefined") {
202: comp[2]=comp[2].toUpperCase();
203: document.tokeninput.codethree.value=comp[2];
204: }
205: document.tokeninput.barcode.value='';
206: }
207: </script>
208: <form method="post" name="tokeninput">
209: <table border="2" bgcolor="#FFFFBB">
210: <tr><th>DocID Checkin</th></tr>
211: <tr><td>
212: <table>
213: <tr>
214: <td>Scan in Barcode</td>
215: <td><input type="text" size="22" name="barcode"
216: onChange="updatetoken()"/></td>
217: </tr>
218: <tr><td><i>or</i> Type in DocID</td>
219: <td>
220: <input type="text" size="5" name="codeone" />
221: <b><font size="+2">*</font></b>
222: <input type="text" size="5" name="codetwo" />
223: <b><font size="+2">*</font></b>
224: <input type="text" size="10" name="codethree" value="$defhost"
225: onChange="this.value=this.value.toUpperCase()" />
226: </td></tr>
227: </table>
228: </td></tr>
229: <tr><td><input type="submit" value="Check in DocID" /></td></tr>
230: </table>
231: </form>
232: ENDINPUTFIELD
233: }
234:
235: sub maketoken {
236: my ($symb,$tuname,$tudom,$tcrsid)=@_;
237: unless ($symb) {
238: $symb=&Apache::lonnet::symbread();
239: }
240: unless ($tuname) {
241: $tuname=$ENV{'user.name'};
242: $tudom=$ENV{'user.domain'};
243: $tcrsid=$ENV{'request.course.id'};
244: }
245:
246: return &Apache::lonnet::checkout($symb,$tuname,$tudom,$tcrsid);
247: }
248:
249: sub printtokenheader {
250: my ($target,$token,$tsymb,$tcrsid,$tudom,$tuname)=@_;
251: unless ($token) { return ''; }
252:
253: my ($symb,$courseid,$domain,$name) = &Apache::lonxml::whichuser();
254: unless ($tsymb) {
255: $tsymb=$symb;
256: }
257: unless ($tuname) {
258: $tuname=$name;
259: $tudom=$domain;
260: $tcrsid=$courseid;
261: }
262:
263: my %reply=&Apache::lonnet::get('environment',
264: ['firstname','middlename','lastname','generation'],
265: $tudom,$tuname);
266: my $plainname=$reply{'firstname'}.' '.
267: $reply{'middlename'}.' '.
268: $reply{'lastname'}.' '.
269: $reply{'generation'};
270:
271: if ($target eq 'web') {
272: my %idhash=&Apache::lonnet::idrget($tudom,($tuname));
273: return
274: '<img align="right" src="/cgi-bin/barcode.png?encode='.$token.'" />'.
275: &mt('Checked out for').' '.$plainname.
276: '<br />'.&mt('User').': '.$tuname.' at '.$tudom.
277: '<br />'.&mt('ID').': '.$idhash{$tuname}.
278: '<br />'.&mt('CourseID').': '.$tcrsid.
279: '<br />'.&mt('Course').': '.$ENV{'course.'.$tcrsid.'.description'}.
280: '<br />'.&mt('DocID').': '.$token.
281: '<br />'.&mt('Time').': '.&Apache::lonlocal::locallocaltime().'<hr />';
282: } else {
283: return $token;
284: }
285: }
286:
287: sub fontsettings() {
288: my $headerstring='';
289: if (($ENV{'browser.os'} eq 'mac') && (!$ENV{'browser.mathml'})) {
290: $headerstring.=
291: '<meta Content-Type="text/html; charset=x-mac-roman" />';
292: } elsif (!$ENV{'browser.mathml'} && $ENV{'browser.unicode'}) {
293: $headerstring.=
294: '<meta http-equiv="Content-Type" content="text/html; charset=utf-8" />';
295: }
296: return $headerstring;
297: }
298:
299: sub printalltags {
300: my $temp;
301: foreach $temp (sort keys %Apache::lonxml::alltags) {
302: &Apache::lonxml::debug("$temp -- ".
303: join(',',@{ $Apache::lonxml::alltags{$temp} }));
304: }
305: }
306:
307: sub xmlparse {
308: my ($request,$target,$content_file_string,$safeinit,%style_for_target) = @_;
309:
310: &setup_globals($request,$target);
311: &Apache::inputtags::initialize_inputtags();
312: &Apache::outputtags::initialize_outputtags();
313: &Apache::edit::initialize_edit();
314: &Apache::londefdef::initialize_londefdef();
315:
316: #
317: # do we have a course style file?
318: #
319:
320: if ($ENV{'request.course.id'} && $ENV{'request.state'} ne 'construct') {
321: my $bodytext=
322: $ENV{'course.'.$ENV{'request.course.id'}.'.default_xml_style'};
323: if ($bodytext) {
324: foreach my $file (split(',',$bodytext)) {
325: my $location=&Apache::lonnet::filelocation('',$file);
326: my $styletext=&Apache::lonnet::getfile($location);
327: if ($styletext ne '-1') {
328: %style_for_target = (%style_for_target,
329: &Apache::style::styleparser($target,$styletext));
330: }
331: }
332: }
333: } elsif ($ENV{'construct.style'} && ($ENV{'request.state'} eq 'construct')) {
334: my $location=&Apache::lonnet::filelocation('',$ENV{'construct.style'});
335: my $styletext=&Apache::lonnet::getfile($location);
336: if ($styletext ne '-1') {
337: %style_for_target = (%style_for_target,
338: &Apache::style::styleparser($target,$styletext));
339: }
340: }
341: #&printalltags();
342: my @pars = ();
343: my $pwd=$ENV{'request.filename'};
344: $pwd =~ s:/[^/]*$::;
345: &newparser(\@pars,\$content_file_string,$pwd);
346:
347: my $safeeval = new Safe;
348: my $safehole = new Safe::Hole;
349: &init_safespace($target,$safeeval,$safehole,$safeinit);
350: #-------------------- Redefinition of the target in the case of compound target
351:
352: ($target, my @tenta) = split('&&',$target);
353:
354: my @stack = ();
355: my @parstack = ();
356: &initdepth;
357:
358: my $finaloutput = &inner_xmlparse($target,\@stack,\@parstack,\@pars,
359: $safeeval,\%style_for_target);
360:
361: if ($ENV{'request.uri'}) {
362: &writeallows($ENV{'request.uri'});
363: }
364: &do_registered_ssi();
365: if ($Apache::lonxml::counter_changed) { &store_counter() }
366: return $finaloutput;
367: }
368:
369: sub htmlclean {
370: my ($raw,$full)=@_;
371: # Take care of CRLF etc
372:
373: $raw=~s/\r\f/\n/gs; $raw=~s/\f\r/\n/gs;
374: $raw=~s/\r\n/\n/gs; $raw=~s/\n\r/\n/gs;
375: $raw=~s/\f/\n/gs; $raw=~s/\r/\n/gs;
376: $raw=~s/\&\#10\;/\n/gs; $raw=~s/\&\#13\;/\n/gs;
377:
378: # Generate empty tags, remove wrong end tags
379: $raw=~s/\<(br|hr|img|meta|allow|basefont)([^\>\/]*?)\>/\<$1$2 \/\>/gis;
380: $raw=~s/\<\/(br|hr|img|meta|allow|basefont)\>//gis;
381: unless ($full) {
382: $raw=~s/\<[\/]*(body|head|html)\>//gis;
383: }
384: # Make standard tags lowercase
385: foreach ('html','body','head','meta','h1','h2','h3','h4','b','i','m',
386: 'table','tr','td','th','p','br','hr','img','embed','font',
387: 'a','strong','center','title','basefont','li','ol','ul',
388: 'input','select','form','option','script','pre') {
389: $raw=~s/\<$_\s*\>/\<$_\>/gis;
390: $raw=~s/\<\/$_\s*\>/<\/$_\>/gis;
391: $raw=~s/\<$_\s([^\>]*)\>/<$_ $1\>/gis;
392: }
393: return $raw;
394: }
395:
396: sub latex_special_symbols {
397: my ($string,$where)=@_;
398: if ($where eq 'header') {
399: $string =~ s/(\\|_|\^)/ /g;
400: $string =~ s/(\$|%|\{|\})/\\$1/g;
401: $string =~ s/_/ /g;
402: $string=&Apache::lonprintout::character_chart($string);
403: # any & or # leftover should be safe to just escape
404: $string=~s/([^\\])\&/$1\\\&/g;
405: $string=~s/([^\\])\#/$1\\\#/g;
406: } else {
407: $string=~s/\\/\\ensuremath{\\backslash}/g;
408: $string=~s/([^\\]|^)\%/$1\\\%/g;
409: $string=~s/([^\\]|^)\$/$1\\\$/g;
410: $string=~s/([^\\])\_/$1\\_/g;
411: $string=~s/\$\$/\$\\\$/g;
412: $string=~s/\_\_/\_\\\_/g;
413: $string=~s/\#\#/\#\\\#/g;
414: $string=~s/([^\\]|^)(\~|\^)/$1\\$2\\strut /g;
415: $string=~s/(>|<)/\\ensuremath\{$1\}/g; #more or less
416: $string=&Apache::lonprintout::character_chart($string);
417: # any & or # leftover should be safe to just escape
418: $string=~s/([^\\]|^)\&/$1\\\&/g;
419: $string=~s/([^\\]|^)\#/$1\\\#/g;
420: $string=~s/\|/\$\\mid\$/g;
421: #single { or } How to escape?
422: }
423: return $string;
424: }
425:
426: sub inner_xmlparse {
427: my ($target,$stack,$parstack,$pars,$safeeval,$style_for_target)=@_;
428: my $finaloutput = '';
429: my $result;
430: my $token;
431: my $dontpop=0;
432: while ( $#$pars > -1 ) {
433: while ($token = $$pars['-1']->get_token) {
434: if (($token->[0] eq 'T') || ($token->[0] eq 'C') ) {
435: if ($metamode<1) {
436: my $text=$token->[1];
437: if ($token->[0] eq 'C' && $target eq 'tex') {
438: $text = '';
439: # $text = '%'.$text."\n";
440: }
441: $result.=$text;
442: }
443: } elsif (($token->[0] eq 'D')) {
444: if ($metamode<1 && $target eq 'web') {
445: my $text=$token->[1];
446: $result.=$text;
447: }
448: } elsif ($token->[0] eq 'PI') {
449: if ($metamode<1 && $target eq 'web') {
450: $result=$token->[2];
451: }
452: } elsif ($token->[0] eq 'S') {
453: # add tag to stack
454: push (@$stack,$token->[1]);
455: # add parameters list to another stack
456: push (@$parstack,&parstring($token));
457: &increasedepth($token);
458: if ($Apache::lonxml::usestyle &&
459: exists($$style_for_target{$token->[1]})) {
460: $Apache::lonxml::usestyle=0;
461: my $string=$$style_for_target{$token->[1]}.
462: '<LONCAPA_INTERNAL_TURN_STYLE_ON />';
463: &Apache::lonxml::newparser($pars,\$string);
464: $Apache::lonxml::style_values=$$parstack[-1];
465: $Apache::lonxml::style_end_values=$$parstack[-1];
466: } else {
467: $result = &callsub("start_$token->[1]", $target, $token, $stack,
468: $parstack, $pars, $safeeval, $style_for_target);
469: }
470: } elsif ($token->[0] eq 'E') {
471: if ($Apache::lonxml::usestyle &&
472: exists($$style_for_target{'/'."$token->[1]"})) {
473: $Apache::lonxml::usestyle=0;
474: my $string=$$style_for_target{'/'.$token->[1]}.
475: '<LONCAPA_INTERNAL_TURN_STYLE_ON end="'.$token->[1].'" />';
476: &Apache::lonxml::newparser($pars,\$string);
477: $Apache::lonxml::style_values=$Apache::lonxml::style_end_values;
478: $Apache::lonxml::style_end_values='';
479: $dontpop=1;
480: } else {
481: #clear out any tags that didn't end
482: while ($token->[1] ne $$stack['-1'] && ($#$stack > -1)) {
483: my $lasttag=$$stack[-1];
484: if ($token->[1] =~ /^\Q$lasttag\E$/i) {
485: &Apache::lonxml::warning('Using tag </'.$token->[1].'> on line '.$token->[3].' as end tag to <'.$$stack[-1].'>');
486: last;
487: } else {
488: &Apache::lonxml::warning('Found tag </'.$token->[1].'> on line '.$token->[3].' when looking for </'.$$stack[-1].'> in file');
489: &end_tag($stack,$parstack,$token);
490: }
491: }
492: $result = &callsub("end_$token->[1]", $target, $token, $stack,
493: $parstack, $pars,$safeeval, $style_for_target);
494: }
495: } else {
496: &Apache::lonxml::error("Unknown token event :$token->[0]:$token->[1]:");
497: }
498: #evaluate variable refs in result
499: if ($Apache::lonxml::post_evaluate &&$result ne "") {
500: my $extras;
501: if (!$Apache::lonxml::usestyle) {
502: $extras=$Apache::lonxml::style_values;
503: }
504: if ( $#$parstack > -1 ) {
505: $result=&Apache::run::evaluate($result,$safeeval,$extras.$$parstack[-1]);
506: } else {
507: $result= &Apache::run::evaluate($result,$safeeval,$extras);
508: }
509: }
510: $Apache::lonxml::post_evaluate=1;
511:
512: if (($token->[0] eq 'T') || ($token->[0] eq 'C') || ($token->[0] eq 'D') ) {
513: #Style file definitions should be correct
514: if ($target eq 'tex' && ($Apache::lonxml::usestyle)) {
515: $result=&latex_special_symbols($result);
516: }
517: }
518:
519: if ($Apache::lonxml::redirection) {
520: $Apache::lonxml::outputstack['-1'] .= $result;
521: } else {
522: $finaloutput.=$result;
523: }
524: $result = '';
525:
526: if ($token->[0] eq 'E' && !$dontpop) {
527: &end_tag($stack,$parstack,$token);
528: }
529: $dontpop=0;
530: }
531: if ($#$pars > -1) {
532: pop @$pars;
533: pop @Apache::lonxml::pwd;
534: }
535: }
536:
537: # if ($target eq 'meta') {
538: # $finaloutput.=&endredirection;
539: # }
540:
541:
542: if (($ENV{'QUERY_STRING'}) && ($target eq 'web')) {
543: $finaloutput=&afterburn($finaloutput);
544: }
545: return $finaloutput;
546: }
547:
548: ##
549: ## Looks to see if there is a subroutine defined for this tag. If so, call it,
550: ## otherwise do not call it as we do not know what it is.
551: ##
552: sub callsub {
553: my ($sub,$target,$token,$tagstack,$parstack,$parser,$safeeval,$style)=@_;
554: my $currentstring='';
555: my $nodefault;
556: {
557: my $sub1;
558: no strict 'refs';
559: my $tag=$token->[1];
560: # get utterly rid of extended html tags
561: if ($tag=~/^x\-/i) { return ''; }
562: my $space=$Apache::lonxml::alltags{$tag}[-1];
563: if (!$space) {
564: $tag=~tr/A-Z/a-z/;
565: $sub=~tr/A-Z/a-z/;
566: $space=$Apache::lonxml::alltags{$tag}[-1]
567: }
568:
569: my $deleted=0;
570: $Apache::lonxml::curdepth=join('_',@Apache::lonxml::depthcounter);
571: if (($token->[0] eq 'S') && ($target eq 'modified')) {
572: $deleted=&Apache::edit::handle_delete($space,$target,$token,$tagstack,
573: $parstack,$parser,$safeeval,
574: $style);
575: }
576: if (!$deleted) {
577: if ($space) {
578: #&Apache::lonxml::debug("Calling sub $sub in $space $metamode");
579: $sub1="$space\:\:$sub";
580: ($currentstring,$nodefault) = &$sub1($target,$token,$tagstack,
581: $parstack,$parser,$safeeval,
582: $style);
583: } else {
584: if ($target eq 'tex') {
585: # throw away tag name
586: return '';
587: }
588: #&Apache::lonxml::debug("NOT Calling sub $sub in $space $metamode");
589: if ($metamode <1) {
590: if (defined($token->[4]) && ($metamode < 1)) {
591: $currentstring = $token->[4];
592: } else {
593: $currentstring = $token->[2];
594: }
595: }
596: }
597: # &Apache::lonxml::debug("nodefalt:$nodefault:");
598: if ($currentstring eq '' && $nodefault eq '') {
599: if ($target eq 'edit') {
600: #&Apache::lonxml::debug("doing default edit for $token->[1]");
601: if ($token->[0] eq 'S') {
602: $currentstring = &Apache::edit::tag_start($target,$token);
603: } elsif ($token->[0] eq 'E') {
604: $currentstring = &Apache::edit::tag_end($target,$token);
605: }
606: } elsif ($target eq 'modified') {
607: if ($token->[0] eq 'S') {
608: $currentstring = $token->[4];
609: $currentstring.=&Apache::edit::handle_insert();
610: } elsif ($token->[0] eq 'E') {
611: $currentstring = $token->[2];
612: $currentstring.=&Apache::edit::handle_insertafter($token->[1]);
613: } else {
614: $currentstring = $token->[2];
615: }
616: }
617: }
618: }
619: use strict 'refs';
620: }
621: return $currentstring;
622: }
623:
624: sub setup_globals {
625: my ($request,$target)=@_;
626: $Apache::lonxml::request=$request;
627: $Apache::lonxml::registered = 0;
628: @Apache::lonxml::htmlareafields=();
629: $errorcount=0;
630: $warningcount=0;
631: $Apache::lonxml::default_homework_loaded=0;
632: $Apache::lonxml::usestyle=1;
633: &init_counter();
634: @Apache::lonxml::pwd=();
635: @Apache::lonxml::extlinks=();
636: @Apache::lonxml::ssi_info=();
637: $Apache::lonxml::post_evaluate=1;
638: $Apache::lonxml::warnings_error_header='';
639: if ($target eq 'meta') {
640: $Apache::lonxml::redirection = 0;
641: $Apache::lonxml::metamode = 1;
642: $Apache::lonxml::evaluate = 1;
643: $Apache::lonxml::import = 0;
644: } elsif ($target eq 'answer') {
645: $Apache::lonxml::redirection = 0;
646: $Apache::lonxml::metamode = 1;
647: $Apache::lonxml::evaluate = 1;
648: $Apache::lonxml::import = 1;
649: } elsif ($target eq 'grade') {
650: &startredirection;
651: $Apache::lonxml::metamode = 0;
652: $Apache::lonxml::evaluate = 1;
653: $Apache::lonxml::import = 1;
654: } elsif ($target eq 'modified') {
655: $Apache::lonxml::redirection = 0;
656: $Apache::lonxml::metamode = 0;
657: $Apache::lonxml::evaluate = 0;
658: $Apache::lonxml::import = 0;
659: } elsif ($target eq 'edit') {
660: $Apache::lonxml::redirection = 0;
661: $Apache::lonxml::metamode = 0;
662: $Apache::lonxml::evaluate = 0;
663: $Apache::lonxml::import = 0;
664: } elsif ($target eq 'analyze') {
665: $Apache::lonxml::redirection = 0;
666: $Apache::lonxml::metamode = 0;
667: $Apache::lonxml::evaluate = 1;
668: $Apache::lonxml::import = 1;
669: } else {
670: $Apache::lonxml::redirection = 0;
671: $Apache::lonxml::metamode = 0;
672: $Apache::lonxml::evaluate = 1;
673: $Apache::lonxml::import = 1;
674: }
675: }
676:
677: sub init_safespace {
678: my ($target,$safeeval,$safehole,$safeinit) = @_;
679: $safeeval->permit("entereval");
680: $safeeval->permit(":base_math");
681: $safeeval->permit("sort");
682: $safeeval->permit("time");
683: $safeeval->deny(":base_io");
684: $safehole->wrap(\&Apache::scripttag::xmlparse,$safeeval,'&xmlparse');
685: $safehole->wrap(\&Apache::outputtags::multipart,$safeeval,'&multipart');
686: $safehole->wrap(\&Apache::lonnet::EXT,$safeeval,'&EXT');
687: $safehole->wrap(\&Apache::chemresponse::chem_standard_order,$safeeval,
688: '&chem_standard_order');
689:
690: $safehole->wrap(\&Math::Cephes::asin,$safeeval,'&asin');
691: $safehole->wrap(\&Math::Cephes::acos,$safeeval,'&acos');
692: $safehole->wrap(\&Math::Cephes::atan,$safeeval,'&atan');
693: $safehole->wrap(\&Math::Cephes::sinh,$safeeval,'&sinh');
694: $safehole->wrap(\&Math::Cephes::cosh,$safeeval,'&cosh');
695: $safehole->wrap(\&Math::Cephes::tanh,$safeeval,'&tanh');
696: $safehole->wrap(\&Math::Cephes::asinh,$safeeval,'&asinh');
697: $safehole->wrap(\&Math::Cephes::acosh,$safeeval,'&acosh');
698: $safehole->wrap(\&Math::Cephes::atanh,$safeeval,'&atanh');
699: $safehole->wrap(\&Math::Cephes::erf,$safeeval,'&erf');
700: $safehole->wrap(\&Math::Cephes::erfc,$safeeval,'&erfc');
701: $safehole->wrap(\&Math::Cephes::j0,$safeeval,'&j0');
702: $safehole->wrap(\&Math::Cephes::j1,$safeeval,'&j1');
703: $safehole->wrap(\&Math::Cephes::jn,$safeeval,'&jn');
704: $safehole->wrap(\&Math::Cephes::jv,$safeeval,'&jv');
705: $safehole->wrap(\&Math::Cephes::y0,$safeeval,'&y0');
706: $safehole->wrap(\&Math::Cephes::y1,$safeeval,'&y1');
707: $safehole->wrap(\&Math::Cephes::yn,$safeeval,'&yn');
708: $safehole->wrap(\&Math::Cephes::yv,$safeeval,'&yv');
709:
710: $safehole->wrap(\&Math::Cephes::bdtr ,$safeeval,'&bdtr' );
711: $safehole->wrap(\&Math::Cephes::bdtrc ,$safeeval,'&bdtrc' );
712: $safehole->wrap(\&Math::Cephes::bdtri ,$safeeval,'&bdtri' );
713: $safehole->wrap(\&Math::Cephes::btdtr ,$safeeval,'&btdtr' );
714: $safehole->wrap(\&Math::Cephes::chdtr ,$safeeval,'&chdtr' );
715: $safehole->wrap(\&Math::Cephes::chdtrc,$safeeval,'&chdtrc');
716: $safehole->wrap(\&Math::Cephes::chdtri,$safeeval,'&chdtri');
717: $safehole->wrap(\&Math::Cephes::fdtr ,$safeeval,'&fdtr' );
718: $safehole->wrap(\&Math::Cephes::fdtrc ,$safeeval,'&fdtrc' );
719: $safehole->wrap(\&Math::Cephes::fdtri ,$safeeval,'&fdtri' );
720: $safehole->wrap(\&Math::Cephes::gdtr ,$safeeval,'&gdtr' );
721: $safehole->wrap(\&Math::Cephes::gdtrc ,$safeeval,'&gdtrc' );
722: $safehole->wrap(\&Math::Cephes::nbdtr ,$safeeval,'&nbdtr' );
723: $safehole->wrap(\&Math::Cephes::nbdtrc,$safeeval,'&nbdtrc');
724: $safehole->wrap(\&Math::Cephes::nbdtri,$safeeval,'&nbdtri');
725: $safehole->wrap(\&Math::Cephes::ndtr ,$safeeval,'&ndtr' );
726: $safehole->wrap(\&Math::Cephes::ndtri ,$safeeval,'&ndtri' );
727: $safehole->wrap(\&Math::Cephes::pdtr ,$safeeval,'&pdtr' );
728: $safehole->wrap(\&Math::Cephes::pdtrc ,$safeeval,'&pdtrc' );
729: $safehole->wrap(\&Math::Cephes::pdtri ,$safeeval,'&pdtri' );
730: $safehole->wrap(\&Math::Cephes::stdtr ,$safeeval,'&stdtr' );
731: $safehole->wrap(\&Math::Cephes::stdtri,$safeeval,'&stdtri');
732:
733: # $safehole->wrap(\&Math::Cephes::new_fract,$safeeval,'&new_fract');
734: # $safehole->wrap(\&Math::Cephes::radd,$safeeval,'&radd');
735: # $safehole->wrap(\&Math::Cephes::rsub,$safeeval,'&rsub');
736: # $safehole->wrap(\&Math::Cephes::rmul,$safeeval,'&rmul');
737: # $safehole->wrap(\&Math::Cephes::rdiv,$safeeval,'&rdiv');
738: # $safehole->wrap(\&Math::Cephes::euclid,$safeeval,'&euclid');
739:
740: $safehole->wrap(\&Math::Random::random_beta,$safeeval,'&math_random_beta');
741: $safehole->wrap(\&Math::Random::random_chi_square,$safeeval,'&math_random_chi_square');
742: $safehole->wrap(\&Math::Random::random_exponential,$safeeval,'&math_random_exponential');
743: $safehole->wrap(\&Math::Random::random_f,$safeeval,'&math_random_f');
744: $safehole->wrap(\&Math::Random::random_gamma,$safeeval,'&math_random_gamma');
745: $safehole->wrap(\&Math::Random::random_multivariate_normal,$safeeval,'&math_random_multivariate_normal');
746: $safehole->wrap(\&Math::Random::random_multinomial,$safeeval,'&math_random_multinomial');
747: $safehole->wrap(\&Math::Random::random_noncentral_chi_square,$safeeval,'&math_random_noncentral_chi_square');
748: $safehole->wrap(\&Math::Random::random_noncentral_f,$safeeval,'&math_random_noncentral_f');
749: $safehole->wrap(\&Math::Random::random_normal,$safeeval,'&math_random_normal');
750: $safehole->wrap(\&Math::Random::random_permutation,$safeeval,'&math_random_permutation');
751: $safehole->wrap(\&Math::Random::random_permuted_index,$safeeval,'&math_random_permuted_index');
752: $safehole->wrap(\&Math::Random::random_uniform,$safeeval,'&math_random_uniform');
753: $safehole->wrap(\&Math::Random::random_poisson,$safeeval,'&math_random_poisson');
754: $safehole->wrap(\&Math::Random::random_uniform_integer,$safeeval,'&math_random_uniform_integer');
755: $safehole->wrap(\&Math::Random::random_negative_binomial,$safeeval,'&math_random_negative_binomial');
756: $safehole->wrap(\&Math::Random::random_binomial,$safeeval,'&math_random_binomial');
757: $safehole->wrap(\&Math::Random::random_seed_from_phrase,$safeeval,'&random_seed_from_phrase');
758: $safehole->wrap(\&Math::Random::random_set_seed_from_phrase,$safeeval,'&random_set_seed_from_phrase');
759: $safehole->wrap(\&Math::Random::random_get_seed,$safeeval,'&random_get_seed');
760: $safehole->wrap(\&Math::Random::random_set_seed,$safeeval,'&random_set_seed');
761: $safehole->wrap(\&Apache::lonxml::error,$safeeval,'&LONCAPA_INTERNAL_ERROR');
762: $safehole->wrap(\&Apache::lonxml::debug,$safeeval,'&LONCAPA_INTERNAL_DEBUG');
763: $safehole->wrap(\&Apache::caparesponse::get_sigrange,$safeeval,'&LONCAPA_INTERNAL_get_sigrange');
764:
765: #need to inspect this class of ops
766: # $safeeval->deny(":base_orig");
767: $safeeval->permit("require");
768: $safeinit .= ';$external::target="'.$target.'";';
769: my $rndseed;
770: my ($symb,$courseid,$domain,$name) = &Apache::lonxml::whichuser();
771: $rndseed=&Apache::lonnet::rndseed($symb,$courseid,$domain,$name);
772: $safeinit .= ';$external::randomseed="'.$rndseed.'";';
773: &Apache::lonxml::debug("Setting rndseed to $rndseed");
774: &Apache::run::run($safeinit,$safeeval);
775:
776: }
777:
778: sub default_homework_load {
779: my ($safeeval)=@_;
780: &Apache::lonxml::debug('Loading default_homework');
781: my $default=&Apache::lonnet::getfile('/home/httpd/html/res/adm/includes/default_homework.lcpm');
782: if ($default eq -1) {
783: &Apache::lonxml::error("<b>Unable to find <i>default_homework.lcpm</i></b>");
784: } else {
785: &Apache::run::run($default,$safeeval);
786: $Apache::lonxml::default_homework_loaded=1;
787: }
788: }
789:
790: my $metamode_was;
791: sub startredirection {
792: if (!$Apache::lonxml::redirection) {
793: $metamode_was=$Apache::lonxml::metamode;
794: }
795: $Apache::lonxml::metamode=0;
796: $Apache::lonxml::redirection++;
797: push (@Apache::lonxml::outputstack, '');
798: }
799:
800: sub endredirection {
801: if (!$Apache::lonxml::redirection) {
802: &Apache::lonxml::error("Endredirection was called, before a startredirection, perhaps you have unbalanced tags. Some debuging information:".join ":",caller);
803: return '';
804: }
805: $Apache::lonxml::redirection--;
806: if (!$Apache::lonxml::redirection) {
807: $Apache::lonxml::metamode=$metamode_was;
808: }
809: pop @Apache::lonxml::outputstack;
810: }
811:
812: sub end_tag {
813: my ($tagstack,$parstack,$token)=@_;
814: pop(@$tagstack);
815: pop(@$parstack);
816: &decreasedepth($token);
817: }
818:
819: sub initdepth {
820: @Apache::lonxml::depthcounter=();
821: $Apache::lonxml::depth=-1;
822: $Apache::lonxml::olddepth=-1;
823: }
824:
825: my @timers;
826: my $lasttime;
827: sub increasedepth {
828: my ($token) = @_;
829: $Apache::lonxml::depth++;
830: $Apache::lonxml::depthcounter[$Apache::lonxml::depth]++;
831: if ($Apache::lonxml::depthcounter[$Apache::lonxml::depth]==1) {
832: $Apache::lonxml::olddepth=$Apache::lonxml::depth;
833: }
834: my $time;
835: if ($Apache::lonxml::debug eq "1") {
836: push(@timers,[&gettimeofday()]);
837: $time=&tv_interval($lasttime);
838: $lasttime=[&gettimeofday()];
839: }
840: my $spacing=' 'x($Apache::lonxml::depth-1);
841: my $curdepth=join('_',@Apache::lonxml::depthcounter);
842: &Apache::lonxml::debug("s$spacing$Apache::lonxml::depth : $Apache::lonxml::olddepth : $curdepth : $token->[1] : $time : \n");
843: #print "<br />s $Apache::lonxml::depth : $Apache::lonxml::olddepth : $curdepth : $token->[1]\n";
844: }
845:
846: sub decreasedepth {
847: my ($token) = @_;
848: $Apache::lonxml::depth--;
849: if ($Apache::lonxml::depth<$Apache::lonxml::olddepth-1) {
850: $#Apache::lonxml::depthcounter--;
851: $Apache::lonxml::olddepth=$Apache::lonxml::depth+1;
852: }
853: if ( $Apache::lonxml::depth < -1) {
854: &Apache::lonxml::warning(&mt("Missing tags, unable to properly run file."));
855: $Apache::lonxml::depth='-1';
856: }
857: my ($timer,$time);
858: if ($Apache::lonxml::debug eq "1") {
859: $timer=pop(@timers);
860: $time=&tv_interval($lasttime);
861: $lasttime=[&gettimeofday()];
862: }
863: my $spacing=' 'x$Apache::lonxml::depth;
864: my $curdepth=join('_',@Apache::lonxml::depthcounter);
865: &Apache::lonxml::debug("e$spacing$Apache::lonxml::depth : $Apache::lonxml::olddepth : $curdepth : $token->[1] : $time : ".&tv_interval($timer)."\n");
866: #print "<br />e $Apache::lonxml::depth : $Apache::lonxml::olddepth : $token->[1] : $curdepth\n";
867: }
868:
869: sub get_all_text_unbalanced {
870: #there is a copy of this in lonpublisher.pm
871: my($tag,$pars)= @_;
872: my $token;
873: my $result='';
874: $tag='<'.$tag.'>';
875: while ($token = $$pars[-1]->get_token) {
876: if (($token->[0] eq 'T')||($token->[0] eq 'C')||($token->[0] eq 'D')) {
877: $result.=$token->[1];
878: } elsif ($token->[0] eq 'PI') {
879: $result.=$token->[2];
880: } elsif ($token->[0] eq 'S') {
881: $result.=$token->[4];
882: } elsif ($token->[0] eq 'E') {
883: $result.=$token->[2];
884: }
885: if ($result =~ /\Q$tag\E/is) {
886: ($result,my $redo)=$result =~ /(.*)\Q$tag\E(.*)/is;
887: #&Apache::lonxml::debug('Got a winner with leftovers ::'.$2);
888: #&Apache::lonxml::debug('Result is :'.$1);
889: $redo=$tag.$redo;
890: &Apache::lonxml::newparser($pars,\$redo);
891: last;
892: }
893: }
894: return $result
895: }
896:
897: sub increment_counter {
898: my ($increment) = @_;
899: if (defined($increment) && $increment gt 0) {
900: $Apache::lonxml::counter+=$increment;
901: } else {
902: $Apache::lonxml::counter++;
903: }
904: $Apache::lonxml::counter_changed=1;
905: }
906:
907: sub init_counter {
908: if (defined($ENV{'form.counter'})) {
909: $Apache::lonxml::counter=$ENV{'form.counter'};
910: $Apache::lonxml::counter_changed=0;
911: } else {
912: $Apache::lonxml::counter=1;
913: $Apache::lonxml::counter_changed=1;
914: }
915: }
916:
917: sub store_counter {
918: &Apache::lonnet::appenv(('form.counter' => $Apache::lonxml::counter));
919: return '';
920: }
921:
922: sub get_all_text {
923: my($tag,$pars,$style)= @_;
924: my $gotfullstack=1;
925: if (ref($pars) ne 'ARRAY') {
926: $gotfullstack=0;
927: $pars=[$pars];
928: }
929: if (ref($style) ne 'HASH') {
930: $style={};
931: }
932: my $depth=0;
933: my $token;
934: my $result='';
935: if ( $tag =~ m:^/: ) {
936: my $tag=substr($tag,1);
937: #&Apache::lonxml::debug("have:$tag:");
938: my $top_empty=0;
939: while (($depth >=0) && ($#$pars > -1) && (!$top_empty)) {
940: while (($depth >=0) && ($token = $$pars[-1]->get_token)) {
941: #&Apache::lonxml::debug("e token:$token->[0]:$depth:$token->[1]:".$#$pars.":".$#Apache::lonxml::pwd);
942: if (($token->[0] eq 'T')||($token->[0] eq 'C')||($token->[0] eq 'D')) {
943: $result.=$token->[1];
944: } elsif ($token->[0] eq 'PI') {
945: $result.=$token->[2];
946: } elsif ($token->[0] eq 'S') {
947: if ($token->[1] =~ /^\Q$tag\E$/i) { $depth++; }
948: if ($token->[1] =~ /^LONCAPA_INTERNAL_TURN_STYLE_ON$/) { $Apache::lonxml::usestyle=1; }
949: if ($token->[1] =~ /^LONCAPA_INTERNAL_TURN_STYLE_OFF$/) { $Apache::lonxml::usestyle=0; }
950: $result.=$token->[4];
951: } elsif ($token->[0] eq 'E') {
952: if ( $token->[1] =~ /^\Q$tag\E$/i) { $depth--; }
953: #skip sending back the last end tag
954: if ($depth == 0 && exists($$style{'/'.$token->[1]}) && $Apache::lonxml::usestyle) {
955: my $string=
956: '<LONCAPA_INTERNAL_TURN_STYLE_OFF end="yes" />'.
957: $$style{'/'.$token->[1]}.
958: $token->[2].
959: '<LONCAPA_INTERNAL_TURN_STYLE_ON />';
960: &Apache::lonxml::newparser($pars,\$string);
961: #&Apache::lonxml::debug("reParsing $string");
962: next;
963: }
964: if ($depth > -1) {
965: $result.=$token->[2];
966: } else {
967: $$pars[-1]->unget_token($token);
968: }
969: }
970: }
971: if (($depth >=0) && ($#$pars == 0) ) { $top_empty=1; }
972: if (($depth >=0) && ($#$pars > 0) ) {
973: pop(@$pars);
974: pop(@Apache::lonxml::pwd);
975: }
976: }
977: if ($top_empty && $depth >= 0) {
978: #never found the end tag ran out of text, throw error send back blank
979: &error('Never found end tag for <'.$tag.
980: '> current string <pre>'.
981: &HTML::Entities::encode($result,'<>&"').
982: '</pre>');
983: if ($gotfullstack) {
984: my $newstring='</'.$tag.'>'.$result;
985: &Apache::lonxml::newparser($pars,\$newstring);
986: }
987: $result='';
988: }
989: } else {
990: while ($#$pars > -1) {
991: while ($token = $$pars[-1]->get_token) {
992: #&Apache::lonxml::debug("s token:$token->[0]:$depth:$token->[1]");
993: if (($token->[0] eq 'T')||($token->[0] eq 'C')||
994: ($token->[0] eq 'D')) {
995: $result.=$token->[1];
996: } elsif ($token->[0] eq 'PI') {
997: $result.=$token->[2];
998: } elsif ($token->[0] eq 'S') {
999: if ( $token->[1] =~ /^\Q$tag\E$/i) {
1000: $$pars[-1]->unget_token($token); last;
1001: } else {
1002: $result.=$token->[4];
1003: }
1004: if ($token->[1] =~ /^LONCAPA_INTERNAL_TURN_STYLE_ON$/) { $Apache::lonxml::usestyle=1; }
1005: if ($token->[1] =~ /^LONCAPA_INTERNAL_TURN_STYLE_OFF$/) { $Apache::lonxml::usestyle=0; }
1006: } elsif ($token->[0] eq 'E') {
1007: $result.=$token->[2];
1008: }
1009: }
1010: if (($#$pars > 0) ) {
1011: pop(@$pars);
1012: pop(@Apache::lonxml::pwd);
1013: } else { last; }
1014: }
1015: }
1016: #&Apache::lonxml::debug("Exit:$result:");
1017: return $result
1018: }
1019:
1020: sub newparser {
1021: my ($parser,$contentref,$dir) = @_;
1022: push (@$parser,HTML::LCParser->new($contentref));
1023: $$parser['-1']->xml_mode('1');
1024: if ( $dir eq '' ) {
1025: push (@Apache::lonxml::pwd, $Apache::lonxml::pwd[$#Apache::lonxml::pwd]);
1026: } else {
1027: push (@Apache::lonxml::pwd, $dir);
1028: }
1029: }
1030:
1031: sub parstring {
1032: my ($token) = @_;
1033: my $temp='';
1034: foreach (@{$token->[3]}) {
1035: unless ($_=~/\W/) {
1036: my $val=$token->[2]->{$_};
1037: $val =~ s/([\%\@\\\"\'])/\\$1/g;
1038: $val =~ s/(\$[^{a-zA-Z_])/\\$1/g;
1039: $val =~ s/(\$)$/\\$1/;
1040: #if ($val =~ m/^[\%\@]/) { $val="\\".$val; }
1041: $temp .= "my \$$_=\"$val\";";
1042: }
1043: }
1044: return $temp;
1045: }
1046:
1047: sub writeallows {
1048: unless ($#extlinks>=0) { return; }
1049: my $thisurl='/res/'.&Apache::lonnet::declutter(shift);
1050: if ($ENV{'httpref.'.$thisurl}) {
1051: $thisurl=$ENV{'httpref.'.$thisurl};
1052: }
1053: my $thisdir=$thisurl;
1054: $thisdir=~s/\/[^\/]+$//;
1055: my %httpref=();
1056: foreach (@extlinks) {
1057: $httpref{'httpref.'.
1058: &Apache::lonnet::hreflocation($thisdir,$_)}=$thisurl;
1059: }
1060: @extlinks=();
1061: &Apache::lonnet::appenv(%httpref);
1062: }
1063:
1064: sub register_ssi {
1065: my ($url,%form)=@_;
1066: push (@Apache::lonxml::ssi_info,{'url'=>$url,'form'=>\%form});
1067: return '';
1068: }
1069:
1070: sub do_registered_ssi {
1071: foreach my $info (@Apache::lonxml::ssi_info) {
1072: my %form=%{ $info->{'form'}};
1073: my $url=$info->{'url'};
1074: &Apache::lonnet::ssi($url,%form);
1075: }
1076: }
1077: #
1078: # Afterburner handles anchors, highlights and links
1079: #
1080: sub afterburn {
1081: my $result=shift;
1082: &Apache::loncommon::get_unprocessed_cgi($ENV{'QUERY_STRING'},
1083: ['highlight','anchor','link']);
1084: if ($ENV{'form.highlight'}) {
1085: foreach (split(/\,/,$ENV{'form.highlight'})) {
1086: my $anchorname=$_;
1087: my $matchthis=$anchorname;
1088: $matchthis=~s/\_+/\\s\+/g;
1089: $result=~s/(\Q$matchthis\E)/\<font color=\"red\"\>$1\<\/font\>/gs;
1090: }
1091: }
1092: if ($ENV{'form.link'}) {
1093: foreach (split(/\,/,$ENV{'form.link'})) {
1094: my ($anchorname,$linkurl)=split(/\>/,$_);
1095: my $matchthis=$anchorname;
1096: $matchthis=~s/\_+/\\s\+/g;
1097: $result=~s/(\Q$matchthis\E)/\<a href=\"$linkurl\"\>$1\<\/a\>/gs;
1098: }
1099: }
1100: if ($ENV{'form.anchor'}) {
1101: my $anchorname=$ENV{'form.anchor'};
1102: my $matchthis=$anchorname;
1103: $matchthis=~s/\_+/\\s\+/g;
1104: $result=~s/(\Q$matchthis\E)/\<a name=\"$anchorname\"\>$1\<\/a\>/s;
1105: $result.=(<<"ENDSCRIPT");
1106: <script type="text/javascript">
1107: document.location.hash='$anchorname';
1108: </script>
1109: ENDSCRIPT
1110: }
1111: return $result;
1112: }
1113:
1114: sub storefile {
1115: my ($file,$contents)=@_;
1116: &Apache::lonnet::correct_line_ends(\$contents);
1117: if (my $fh=Apache::File->new('>'.$file)) {
1118: print $fh $contents;
1119: $fh->close();
1120: return 1;
1121: } else {
1122: &warning("Unable to save file $file");
1123: return 0;
1124: }
1125: }
1126:
1127: sub createnewhtml {
1128: my $title=&mt('Title of document goes here');
1129: my $body=&mt('Body of document goes here');
1130: my $filecontents=(<<SIMPLECONTENT);
1131: <!DOCTYPE html PUBLIC "-//W3C//DTD XHTML 1.1//EN" "http://www.w3.org/TR/xhtml/11/DTD/xhtml11.dtd">
1132: <html>
1133: <head>
1134: <title>$title</title>
1135: </head>
1136: <body bgcolor="#FFFFFF">
1137: $body
1138: </body>
1139: </html>
1140: SIMPLECONTENT
1141: return $filecontents;
1142: }
1143:
1144: sub createnewsty {
1145: my $filecontents=(<<SIMPLECONTENT);
1146: <definetag name="">
1147: <render>
1148: <web></web>
1149: <tex></tex>
1150: </render>
1151: </definetag>
1152: SIMPLECONTENT
1153: return $filecontents;
1154: }
1155:
1156:
1157: sub inserteditinfo {
1158: my ($result,$filecontents,$filetype)=@_;
1159: $filecontents = &HTML::Entities::encode($filecontents,'<>&"');
1160: # my $editheader='<a href="#editsection">Edit below</a><hr />';
1161: my $xml_help = '';
1162: my $initialize='';
1163: if ($filetype eq 'html') {
1164: my $addbuttons=&Apache::lonhtmlcommon::htmlareaaddbuttons();
1165: $initialize=&Apache::lonhtmlcommon::htmlareaheaders().
1166: &Apache::lonhtmlcommon::spellheader();
1167: if (!&Apache::lonhtmlcommon::htmlareablocked() &&
1168: &Apache::lonhtmlcommon::htmlareabrowser()) {
1169: $initialize.=(<<FULLPAGE);
1170: <script type="text/javascript">
1171: $addbuttons
1172:
1173: HTMLArea.loadPlugin("FullPage");
1174:
1175: function initDocument() {
1176: var editor=new HTMLArea("filecont",config);
1177: editor.registerPlugin(FullPage);
1178: editor.generate();
1179: }
1180: </script>
1181: FULLPAGE
1182: } else {
1183: $initialize.=(<<FULLPAGE);
1184: <script type="text/javascript">
1185: $addbuttons
1186: function initDocument() {
1187: }
1188: </script>
1189: FULLPAGE
1190: }
1191: $result=~s/\<body([^\>]*)\>/\<body onload="initDocument()" $1\>/i;
1192: $xml_help=&Apache::loncommon::helpLatexCheatsheet();
1193: }
1194: my $cleanbut = '';
1195: if ($filetype eq 'html') {
1196: $cleanbut='<input type="submit" name="attemptclean" value="'.
1197: &mt('Save and then attempt to clean HTML').'" />';
1198: }
1199: my $titledisplay=&display_title();
1200: my %lt=&Apache::lonlocal::texthash('st' => 'Save this',
1201: 'vi' => 'View',
1202: 'ed' => 'Edit');
1203: my $buttons=(<<BUTTONS);
1204: $cleanbut
1205: <input type="submit" name="savethisfile" accesskey="s" value="$lt{'st'}" />
1206: <input type="submit" name="viewmode" accesskey="v" value="$lt{'vi'}" />
1207: BUTTONS
1208: $buttons.=&Apache::lonhtmlcommon::spelllink('xmledit','filecont');
1209: $buttons.=&Apache::lonhtmlcommon::htmlareaselectactive('filecont');
1210: my $editfooter=(<<ENDFOOTER);
1211: $initialize
1212: <hr />
1213: <a name="editsection" />
1214: <form method="post" name="xmledit">
1215: $xml_help
1216: <input type="hidden" name="editmode" value="$lt{'ed'}" />
1217: $buttons<br />
1218: <textarea cols="80" rows="44" name="filecont" id="filecont">$filecontents</textarea>
1219: <br />$buttons
1220: <br />
1221: </form>
1222: $titledisplay
1223: </body>
1224: ENDFOOTER
1225: # $result=~s/(\<body[^\>]*\>)/$1$editheader/is;
1226: $result=~s/(\<\/body\>)/$editfooter/is;
1227: return $result;
1228: }
1229:
1230: sub get_target {
1231: my $viewgrades=&Apache::lonnet::allowed('vgr',$ENV{'request.course.id'});
1232: if ( $ENV{'request.state'} eq 'published') {
1233: if ( defined($ENV{'form.grade_target'})
1234: && ($viewgrades == 'F' )) {
1235: return ($ENV{'form.grade_target'});
1236: } elsif (defined($ENV{'form.grade_target'})) {
1237: if (($ENV{'form.grade_target'} eq 'web') ||
1238: ($ENV{'form.grade_target'} eq 'tex') ) {
1239: return $ENV{'form.grade_target'}
1240: } else {
1241: return 'web';
1242: }
1243: } else {
1244: return 'web';
1245: }
1246: } elsif ($ENV{'request.state'} eq 'construct') {
1247: if ( defined($ENV{'form.grade_target'})) {
1248: return ($ENV{'form.grade_target'});
1249: } else {
1250: return 'web';
1251: }
1252: } else {
1253: return 'web';
1254: }
1255: }
1256:
1257: sub handler {
1258: my $request=shift;
1259:
1260: my $target=&get_target();
1261:
1262: $Apache::lonxml::debug=$ENV{'user.debug'};
1263:
1264: if ($ENV{'browser.mathml'}) {
1265: &Apache::loncommon::content_type($request,'text/xml');
1266: } else {
1267: &Apache::loncommon::content_type($request,'text/html');
1268: }
1269: &Apache::loncommon::no_cache($request);
1270: $request->set_last_modified(&Apache::lonnet::metadata($request->uri,
1271: 'lastrevisiondate'));
1272: $request->send_http_header;
1273:
1274: return OK if $request->header_only;
1275:
1276:
1277: my $file=&Apache::lonnet::filelocation("",$request->uri);
1278: my $filetype;
1279: if ($file =~ /\.sty$/) {
1280: $filetype='sty';
1281: } else {
1282: $filetype='html';
1283: }
1284: #
1285: # Edit action? Save file.
1286: #
1287: unless ($ENV{'request.state'} eq 'published') {
1288: if (($ENV{'form.savethisfile'}) || ($ENV{'form.attemptclean'})) {
1289: if (&storefile($file,$ENV{'form.filecont'})) {
1290: &Apache::lonxml::info("<font COLOR=\"#0000FF\">".
1291: &mt('Updated').": ".
1292: &Apache::lonlocal::locallocaltime(time).
1293: " </font>");
1294: }
1295: }
1296: }
1297: my %mystyle;
1298: my $result = '';
1299: my $filecontents=&Apache::lonnet::getfile($file);
1300: if ($filecontents eq -1) {
1301: my $bodytag=&Apache::loncommon::bodytag('File Error');
1302: my $fnf=&mt('File not found');
1303: $result=(<<ENDNOTFOUND);
1304: <html>
1305: <head>
1306: <title>$fnf</title>
1307: </head>
1308: $bodytag
1309: <b>$fnf: $file</b>
1310: </body>
1311: </html>
1312: ENDNOTFOUND
1313: $filecontents='';
1314: if ($ENV{'request.state'} ne 'published') {
1315: if ($filetype eq 'sty') {
1316: $filecontents=&createnewsty();
1317: } else {
1318: $filecontents=&createnewhtml();
1319: }
1320: $ENV{'form.editmode'}='Edit'; #force edit mode
1321: }
1322: } else {
1323: unless ($ENV{'request.state'} eq 'published') {
1324: if ($filecontents=~/BEGIN LON-CAPA Internal/) {
1325: &Apache::lonxml::error(&mt('This file appears to be a rendering of a Lon-CAPA resource. If this is correct, this resource will act very oddly and incorrectly.'));
1326: }
1327:
1328: if ($ENV{'form.attemptclean'}) {
1329: $filecontents=&htmlclean($filecontents,1);
1330: }
1331: #
1332: # we are in construction space, see if edit mode forced
1333: &Apache::loncommon::get_unprocessed_cgi
1334: ($ENV{'QUERY_STRING'},['editmode']);
1335: }
1336: if (!$ENV{'form.editmode'} || $ENV{'form.viewmode'}) {
1337: $result = &Apache::lonxml::xmlparse($request,$target,$filecontents,
1338: '',%mystyle);
1339: }
1340: }
1341:
1342: #
1343: # Edit action? Insert editing commands
1344: #
1345: unless ($ENV{'request.state'} eq 'published') {
1346: if ($ENV{'form.editmode'} && (!($ENV{'form.viewmode'}))) {
1347: my $displayfile=$request->uri;
1348: $displayfile=~s/^\/[^\/]*//;
1349: my $bodytag='<body bgcolor="#FFFFFF">';
1350: if ($ENV{'environment.remote'} eq 'off') {
1351: $bodytag=&Apache::loncommon::bodytag();
1352: }
1353: $result='<html>'.$bodytag.
1354: &Apache::lonxml::message_location().'<h3>'.
1355: $displayfile.
1356: '</h3></body></html>';
1357: $result=&inserteditinfo($result,$filecontents,$filetype);
1358: }
1359: }
1360: if ($filetype eq 'html') { writeallows($request->uri); }
1361:
1362:
1363: &Apache::lonxml::add_messages(\$result);
1364: $request->print($result);
1365:
1366: return OK;
1367: }
1368:
1369: sub display_title {
1370: my $result;
1371: if ($ENV{'request.state'} eq 'construct') {
1372: my $title=&Apache::lonnet::gettitle();
1373: if (!defined($title) || $title eq '') {
1374: $title = $ENV{'request.filename'};
1375: $title = substr($title, rindex($title, '/') + 1);
1376: }
1377: $result = "<script type='text/javascript'>top.document.title = '$title - LON-CAPA Construction Space';</script>";
1378: }
1379: return $result;
1380: }
1381:
1382: sub debug {
1383: if ($Apache::lonxml::debug eq "1") {
1384: $|=1;
1385: my $request=$Apache::lonxml::request;
1386: if (!$request) { $request=Apache->request; }
1387: $request->print('<font size="-2"><pre>DEBUG:'.&HTML::Entities::encode($_[0],'<>&"')."</pre></font>\n");
1388: #&Apache::lonnet::logthis($_[0]);
1389: }
1390: }
1391:
1392: sub show_error_warn_msg {
1393: if ($ENV{'request.filename'} eq '/home/httpd/html/res/lib/templates/simpleproblem.problem' &&
1394: &Apache::lonnet::allowed('mdc',$ENV{'request.course.id'})) {
1395: return 1;
1396: }
1397: return (($Apache::lonxml::debug eq 1) ||
1398: ($ENV{'request.state'} eq 'construct') ||
1399: ($Apache::lonhomework::browse eq 'F'
1400: &&
1401: $ENV{'form.show_errors'} eq 'on'));
1402: }
1403:
1404: sub error {
1405: $errorcount++;
1406: if ( &show_error_warn_msg() ) {
1407: # If printing in construction space, put the error inside <pre></pre>
1408: push(@Apache::lonxml::error_messages,
1409: $Apache::lonxml::warnings_error_header.
1410: "<b>ERROR:</b>".join("<br />\n",@_)."<br />\n");
1411: $Apache::lonxml::warnings_error_header='';
1412: } else {
1413: my $errormsg;
1414: my ($symb)=&Apache::lonnet::symbread();
1415: if ( !$symb ) {
1416: #public or browsers
1417: $errormsg=&mt("An error occured while processing this resource. The author has been notified.");
1418: }
1419: #notify author
1420: &Apache::lonmsg::author_res_msg($ENV{'request.filename'},join('<br />',@_));
1421: #notify course
1422: if ( $symb && $ENV{'request.course.id'} ) {
1423: my (undef,%users)=&Apache::lonfeedback::decide_receiver(undef,0,1,1,1);
1424: my $declutter=&Apache::lonnet::declutter($ENV{'request.filename'});
1425: my @userlist;
1426: foreach (keys %users) {
1427: my ($user,$domain) = split(/:/, $_);
1428: push(@userlist,"$user\@$domain");
1429: &Apache::lonmsg::user_normal_msg($user,$domain,
1430: "Error [$declutter]",join('<br />',@_));
1431: }
1432: if ($ENV{'request.role.adv'}) {
1433: $errormsg=&mt("An error occured while processing this resource. The course personnel ([_1]) and the author have been notified.",join(', ',@userlist));
1434: } else {
1435: $errormsg=&mt("An error occured while processing this resource. The instructor has been notified.");
1436: }
1437: }
1438: push(@Apache::lonxml::error_messages,"<b>$errormsg</b> <br />");
1439: }
1440: }
1441:
1442: sub warning {
1443: $warningcount++;
1444:
1445: if ($ENV{'form.grade_target'} ne 'tex') {
1446: if ( &show_error_warn_msg() ) {
1447: my $request=$Apache::lonxml::request;
1448: if (!$request) { $request=Apache->request; }
1449: push(@Apache::lonxml::warning_messages,
1450: $Apache::lonxml::warnings_error_header.
1451: "<b>W</b>ARNING<b>:</b>".join('<br />',@_)."<br />\n");
1452: $Apache::lonxml::warnings_error_header='';
1453: }
1454: }
1455: }
1456:
1457: sub info {
1458: if ($ENV{'form.grade_target'} ne 'tex'
1459: && $ENV{'request.state'} eq 'construct') {
1460: push(@Apache::lonxml::info_messages,join('<br />',@_)."<br />\n");
1461: }
1462: }
1463:
1464: sub message_location {
1465: return '__LONCAPA_INTERNAL_MESSAGE_LOCATION__';
1466: }
1467:
1468: sub add_messages {
1469: my ($msg)=@_;
1470: my $result=join(' ',
1471: @Apache::lonxml::info_messages,
1472: @Apache::lonxml::error_messages,
1473: @Apache::lonxml::warning_messages);
1474: undef(@Apache::lonxml::info_messages);
1475: undef(@Apache::lonxml::error_messages);
1476: undef(@Apache::lonxml::warning_messages);
1477: $$msg=~s/__LONCAPA_INTERNAL_MESSAGE_LOCATION__/$result/;
1478: $$msg=~s/__LONCAPA_INTERNAL_MESSAGE_LOCATION__//g;
1479: }
1480:
1481: sub get_param {
1482: my ($param,$parstack,$safeeval,$context,$case_insensitive) = @_;
1483: if ( ! $context ) { $context = -1; }
1484: my $args ='';
1485: if ( $#$parstack > (-2-$context) ) { $args=$$parstack[$context]; }
1486: if ( ! $Apache::lonxml::usestyle ) {
1487: $args=$Apache::lonxml::style_values.$args;
1488: }
1489: if ( ! $args ) { return undef; }
1490: if ( $case_insensitive ) {
1491: if ($args =~ s/(my \$)(\Q$param\E)(=\")/$1.lc($2).$3/ei) {
1492: return &Apache::run::run("{$args;".'return $'.$param.'}',
1493: $safeeval); #'
1494: } else {
1495: return undef;
1496: }
1497: } else {
1498: if ( $args =~ /my \$\Q$param\E=\"/ ) {
1499: return &Apache::run::run("{$args;".'return $'.$param.'}',
1500: $safeeval); #'
1501: } else {
1502: return undef;
1503: }
1504: }
1505: }
1506:
1507: sub get_param_var {
1508: my ($param,$parstack,$safeeval,$context,$case_insensitive) = @_;
1509: if ( ! $context ) { $context = -1; }
1510: my $args ='';
1511: if ( $#$parstack > (-2-$context) ) { $args=$$parstack[$context]; }
1512: if ( ! $Apache::lonxml::usestyle ) {
1513: $args=$Apache::lonxml::style_values.$args;
1514: }
1515: &Apache::lonxml::debug("Args are $args param is $param");
1516: if ($case_insensitive) {
1517: if (! ($args=~s/(my \$)(\Q$param\E)(=\")/$1.lc($2).$3/ei)) {
1518: return undef;
1519: }
1520: } elsif ( $args !~ /my \$\Q$param\E=\"/ ) { return undef; }
1521: my $value=&Apache::run::run("{$args;".'return $'.$param.'}',$safeeval); #'
1522: &Apache::lonxml::debug("first run is $value");
1523: if ($value =~ /^[\$\@\%][a-zA-Z_]\w*$/) {
1524: &Apache::lonxml::debug("doing second");
1525: my @result=&Apache::run::run("return $value",$safeeval,1);
1526: if (!defined($result[0])) {
1527: return $value
1528: } else {
1529: if (wantarray) { return @result; } else { return $result[0]; }
1530: }
1531: } else {
1532: return $value;
1533: }
1534: }
1535:
1536: sub register_insert {
1537: my @data = split /\n/, &Apache::lonnet::getfile('/home/httpd/lonTabs/insertlist.tab');
1538: my $i;
1539: my $tagnum=0;
1540: my @order;
1541: for ($i=0;$i < $#data; $i++) {
1542: my $line = $data[$i];
1543: if ( $line =~ /^\#/ || $line =~ /^\s*\n/) { next; }
1544: if ( $line =~ /TABLE/ ) { last; }
1545: my ($tag,$descrip,$color,$function,$show,$helpfile,$helpdesc) = split(/,/, $line);
1546: if ($tag) {
1547: $insertlist{"$tagnum.tag"} = $tag;
1548: $insertlist{"$tagnum.description"} = $descrip;
1549: $insertlist{"$tagnum.color"} = $color;
1550: $insertlist{"$tagnum.function"} = $function;
1551: if (!defined($show)) { $show='yes'; }
1552: $insertlist{"$tagnum.show"}= $show;
1553: $insertlist{"$tagnum.helpfile"} = $helpfile;
1554: $insertlist{"$tagnum.helpdesc"} = $helpdesc;
1555: $insertlist{"$tag.num"}=$tagnum;
1556: $tagnum++;
1557: }
1558: }
1559: $i++; #skipping TABLE line
1560: $tagnum = 0;
1561: for (;$i < $#data;$i++) {
1562: my $line = $data[$i];
1563: my ($mnemonic,@which) = split(/ +/,$line);
1564: my $tag = $insertlist{"$tagnum.tag"};
1565: for (my $j=0;$j <=$#which;$j++) {
1566: if ( $which[$j] eq 'Y' ) {
1567: if ($insertlist{"$j.show"} ne 'no') {
1568: push(@{ $insertlist{"$tag.which"} },$j);
1569: }
1570: }
1571: }
1572: $tagnum++;
1573: }
1574: }
1575:
1576: sub description {
1577: my ($token)=@_;
1578: my $tagnum;
1579: my $tag=$token->[1];
1580: foreach my $namespace (reverse @Apache::lonxml::namespace) {
1581: my $testtag=$namespace.'::'.$tag;
1582: $tagnum=$insertlist{"$testtag.num"};
1583: if (defined($tagnum)) { last; }
1584: }
1585: if (!defined ($tagnum)) { $tagnum=$Apache::lonxml::insertlist{"$tag.num"}; }
1586: return $insertlist{$tagnum.'.description'};
1587: }
1588:
1589: # Returns a list containing the help file, and the description
1590: sub helpinfo {
1591: my ($token)=@_;
1592: my $tagnum;
1593: my $tag=$token->[1];
1594: foreach my $namespace (reverse @Apache::lonxml::namespace) {
1595: my $testtag=$namespace.'::'.$tag;
1596: $tagnum=$insertlist{"$testtag.num"};
1597: if (defined($tagnum)) { last; }
1598: }
1599: if (!defined ($tagnum)) { $tagnum=$Apache::lonxml::insertlist{"$tag.num"}; }
1600: return ($insertlist{$tagnum.'.helpfile'}, $insertlist{$tagnum.'.helpdesc'});
1601: }
1602:
1603: # ----------------------------------------------------------------- whichuser
1604: # returns a list of $symb, $courseid, $domain, $name that is correct for
1605: # calls to lonnet functions for this setup.
1606: # - looks for form.grade_ parameters
1607: sub whichuser {
1608: my ($passedsymb)=@_;
1609: my ($symb,$courseid,$domain,$name,$publicuser);
1610: if (defined($ENV{'form.grade_symb'})) {
1611: my ($tmp_courseid)=
1612: &Apache::loncommon::get_env_multiple('form.grade_courseid');
1613: my $allowed=&Apache::lonnet::allowed('vgr',$tmp_courseid);
1614: if (!$allowed &&
1615: exists($ENV{'request.course.sec'}) &&
1616: $ENV{'request.course.sec'} !~ /^\s*$/) {
1617: $allowed=&Apache::lonnet::allowed('vgr',$tmp_courseid.
1618: '/'.$ENV{'request.course.sec'});
1619: }
1620: if ($allowed) {
1621: ($symb)=&Apache::loncommon::get_env_multiple('form.grade_symb');
1622: $courseid=$tmp_courseid;
1623: ($domain)=&Apache::loncommon::get_env_multiple('form.grade_domain');
1624: ($name)=&Apache::loncommon::get_env_multiple('form.grade_username');
1625: return ($symb,$courseid,$domain,$name,$publicuser);
1626: }
1627: }
1628: if (!$passedsymb) {
1629: $symb=&Apache::lonnet::symbread();
1630: } else {
1631: $symb=$passedsymb;
1632: }
1633: $courseid=$ENV{'request.course.id'};
1634: $domain=$ENV{'user.domain'};
1635: $name=$ENV{'user.name'};
1636: if ($name eq 'public' && $domain eq 'public') {
1637: if (!defined($ENV{'form.username'})) {
1638: $ENV{'form.username'}.=time.rand(10000000);
1639: }
1640: $name.=$ENV{'form.username'};
1641: }
1642: return ($symb,$courseid,$domain,$name,$publicuser);
1643: }
1644:
1645: 1;
1646: __END__
1647:
1648:
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