1: # The LearningOnline Network with CAPA
2: # XML Parser Module
3: #
4: # $Id: lonxml.pm,v 1.335 2004/08/10 18:25:53 sakharuk 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 $warningcount @htmlareafields);
44: use strict;
45: use HTML::LCParser();
46: use HTML::TreeBuilder();
47: use HTML::Entities();
48: use Safe();
49: use Safe::Hole();
50: use Math::Cephes();
51: use Math::Random();
52: use Opcode();
53: use POSIX qw(strftime);
54:
55:
56: sub register {
57: my ($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='<html>';
163: }
164: return $output;
165: }
166:
167: sub xmlend {
168: my ($target,$parser)=@_;
169: my $mode='xml';
170: my $status='OPEN';
171: if ($Apache::lonhomework::parsing_a_problem) {
172: $mode='problem';
173: $status=$Apache::inputtags::status[-1];
174: }
175: my $discussion=&Apache::lonfeedback::list_discussion($mode,$status);
176: if ($target eq 'tex') {
177: $discussion.='<tex>\keephidden{ENDOFPROBLEM}\vskip 0.5mm\noindent\makebox[\textwidth/$number_of_columns][b]{\hrulefill}\end{document}</tex>';
178: &Apache::lonxml::newparser($parser,\$discussion,'');
179: return '';
180: } else {
181: return $discussion.'</html>';
182: }
183: }
184:
185: sub tokeninputfield {
186: my $defhost=$Apache::lonnet::perlvar{'lonHostID'};
187: $defhost=~tr/a-z/A-Z/;
188: return (<<ENDINPUTFIELD)
189: <script type="text/javascript">
190: function updatetoken() {
191: var comp=new Array;
192: var barcode=unescape(document.tokeninput.barcode.value);
193: comp=barcode.split('*');
194: if (typeof(comp[0])!="undefined") {
195: document.tokeninput.codeone.value=comp[0];
196: }
197: if (typeof(comp[1])!="undefined") {
198: document.tokeninput.codetwo.value=comp[1];
199: }
200: if (typeof(comp[2])!="undefined") {
201: comp[2]=comp[2].toUpperCase();
202: document.tokeninput.codethree.value=comp[2];
203: }
204: document.tokeninput.barcode.value='';
205: }
206: </script>
207: <form method="post" name="tokeninput">
208: <table border="2" bgcolor="#FFFFBB">
209: <tr><th>DocID Checkin</th></tr>
210: <tr><td>
211: <table>
212: <tr>
213: <td>Scan in Barcode</td>
214: <td><input type="text" size="22" name="barcode"
215: onChange="updatetoken()"/></td>
216: </tr>
217: <tr><td><i>or</i> Type in DocID</td>
218: <td>
219: <input type="text" size="5" name="codeone" />
220: <b><font size="+2">*</font></b>
221: <input type="text" size="5" name="codetwo" />
222: <b><font size="+2">*</font></b>
223: <input type="text" size="10" name="codethree" value="$defhost"
224: onChange="this.value=this.value.toUpperCase()" />
225: </td></tr>
226: </table>
227: </td></tr>
228: <tr><td><input type="submit" value="Check in DocID" /></td></tr>
229: </table>
230: </form>
231: ENDINPUTFIELD
232: }
233:
234: sub maketoken {
235: my ($symb,$tuname,$tudom,$tcrsid)=@_;
236: unless ($symb) {
237: $symb=&Apache::lonnet::symbread();
238: }
239: unless ($tuname) {
240: $tuname=$ENV{'user.name'};
241: $tudom=$ENV{'user.domain'};
242: $tcrsid=$ENV{'request.course.id'};
243: }
244:
245: return &Apache::lonnet::checkout($symb,$tuname,$tudom,$tcrsid);
246: }
247:
248: sub printtokenheader {
249: my ($target,$token,$tsymb,$tcrsid,$tudom,$tuname)=@_;
250: unless ($token) { return ''; }
251:
252: my ($symb,$courseid,$domain,$name) = &Apache::lonxml::whichuser();
253: unless ($tsymb) {
254: $tsymb=$symb;
255: }
256: unless ($tuname) {
257: $tuname=$name;
258: $tudom=$domain;
259: $tcrsid=$courseid;
260: }
261:
262: my %reply=&Apache::lonnet::get('environment',
263: ['firstname','middlename','lastname','generation'],
264: $tudom,$tuname);
265: my $plainname=$reply{'firstname'}.' '.
266: $reply{'middlename'}.' '.
267: $reply{'lastname'}.' '.
268: $reply{'generation'};
269:
270: if ($target eq 'web') {
271: my %idhash=&Apache::lonnet::idrget($tudom,($tuname));
272: return
273: '<img align="right" src="/cgi-bin/barcode.png?encode='.$token.'" />'.
274: &mt('Checked out for').' '.$plainname.
275: '<br />'.&mt('User').': '.$tuname.' at '.$tudom.
276: '<br />'.&mt('ID').': '.$idhash{$tuname}.
277: '<br />'.&mt('CourseID').': '.$tcrsid.
278: '<br />'.&mt('Course').': '.$ENV{'course.'.$tcrsid.'.description'}.
279: '<br />'.&mt('DocID').': '.$token.
280: '<br />'.&mt('Time').': '.&Apache::lonlocal::locallocaltime().'<hr />';
281: } else {
282: return $token;
283: }
284: }
285:
286: sub fontsettings() {
287: my $headerstring='';
288: if (($ENV{'browser.os'} eq 'mac') && (!$ENV{'browser.mathml'})) {
289: $headerstring.=
290: '<meta Content-Type="text/html; charset=x-mac-roman">';
291: } elsif (!$ENV{'browser.mathml'} && $ENV{'browser.unicode'}) {
292: $headerstring.=
293: '<meta http-equiv="Content-Type" content="text/html; charset=utf-8" />';
294: }
295: return $headerstring;
296: }
297:
298: sub printalltags {
299: my $temp;
300: foreach $temp (sort keys %Apache::lonxml::alltags) {
301: &Apache::lonxml::debug("$temp -- ".
302: join(',',@{ $Apache::lonxml::alltags{$temp} }));
303: }
304: }
305:
306: sub xmlparse {
307: my ($request,$target,$content_file_string,$safeinit,%style_for_target) = @_;
308:
309: &setup_globals($request,$target);
310: &Apache::inputtags::initialize_inputtags();
311: &Apache::outputtags::initialize_outputtags();
312: &Apache::edit::initialize_edit();
313: &Apache::londefdef::initialize_londefdef();
314:
315: #
316: # do we have a course style file?
317: #
318:
319: if ($ENV{'request.course.id'} && $ENV{'request.state'} ne 'construct') {
320: my $bodytext=
321: $ENV{'course.'.$ENV{'request.course.id'}.'.default_xml_style'};
322: if ($bodytext) {
323: my $location=&Apache::lonnet::filelocation('',$bodytext);
324: my $styletext=&Apache::lonnet::getfile($location);
325: if ($styletext ne '-1') {
326: %style_for_target = (%style_for_target,
327: &Apache::style::styleparser($target,$styletext));
328: }
329: }
330: } elsif ($ENV{'construct.style'} && ($ENV{'request.state'} eq 'construct')) {
331: my $location=&Apache::lonnet::filelocation('',$ENV{'construct.style'});
332: my $styletext=&Apache::lonnet::getfile($location);
333: if ($styletext ne '-1') {
334: %style_for_target = (%style_for_target,
335: &Apache::style::styleparser($target,$styletext));
336: }
337: }
338: #&printalltags();
339: my @pars = ();
340: my $pwd=$ENV{'request.filename'};
341: $pwd =~ s:/[^/]*$::;
342: &newparser(\@pars,\$content_file_string,$pwd);
343:
344: my $safeeval = new Safe;
345: my $safehole = new Safe::Hole;
346: &init_safespace($target,$safeeval,$safehole,$safeinit);
347: #-------------------- Redefinition of the target in the case of compound target
348:
349: ($target, my @tenta) = split('&&',$target);
350:
351: my @stack = ();
352: my @parstack = ();
353: &initdepth;
354:
355: my $finaloutput = &inner_xmlparse($target,\@stack,\@parstack,\@pars,
356: $safeeval,\%style_for_target);
357:
358: if ($ENV{'request.uri'}) {
359: &writeallows($ENV{'request.uri'});
360: }
361: &do_registered_ssi();
362: if ($Apache::lonxml::counter_changed) { &store_counter() }
363: return $finaloutput;
364: }
365:
366: sub htmlclean {
367: my ($raw,$full)=@_;
368:
369: my $tree = HTML::TreeBuilder->new;
370: $tree->ignore_unknown(0);
371:
372: $tree->parse($raw);
373:
374: my $output= $tree->as_HTML(undef,' ');
375:
376: $output=~s/\<(br|hr|img|meta|allow)(.*?)\>/\<$1$2 \/\>/gis;
377: $output=~s/\<\/(br|hr|img|meta|allow)\>//gis;
378: unless ($full) {
379: $output=~s/\<[\/]*(body|head|html)\>//gis;
380: }
381:
382: $tree = $tree->delete;
383:
384: return $output;
385: }
386:
387: sub latex_special_symbols {
388: my ($string,$where)=@_;
389: if ($where eq 'header') {
390: $string =~ s/(\\|_|\^)/ /g;
391: $string =~ s/(\$|%|\{|\})/\\$1/g;
392: $string =~ s/_/ /g;
393: $string=&Apache::lonprintout::character_chart($string);
394: # any & or # leftover should be safe to just escape
395: $string=~s/([^\\])\&/$1\\\&/g;
396: $string=~s/([^\\])\#/$1\\\#/g;
397: } else {
398: $string=~s/\\/\\ensuremath{\\backslash}/g;
399: $string=~s/([^\\]|^)\%/$1\\\%/g;
400: $string=~s/([^\\]|^)\$/$1\\\$/g;
401: $string=~s/([^\\])\_/$1\\_/g;
402: $string=~s/\$\$/\$\\\$/g;
403: $string=~s/\_\_/\_\\\_/g;
404: $string=~s/\#\#/\#\\\#/g;
405: $string=~s/([^\\]|^)(\~|\^)/$1\\$2\\strut /g;
406: $string=~s/(>|<)/\\ensuremath\{$1\}/g; #more or less
407: $string=&Apache::lonprintout::character_chart($string);
408: # any & or # leftover should be safe to just escape
409: $string=~s/([^\\]|^)\&/$1\\\&/g;
410: $string=~s/([^\\]|^)\#/$1\\\#/g;
411: $string=~s/\|/\$\\mid\$/g;
412: #single { or } How to escape?
413: }
414: return $string;
415: }
416:
417: sub inner_xmlparse {
418: my ($target,$stack,$parstack,$pars,$safeeval,$style_for_target)=@_;
419: my $finaloutput = '';
420: my $result;
421: my $token;
422: my $dontpop=0;
423: while ( $#$pars > -1 ) {
424: while ($token = $$pars['-1']->get_token) {
425: if (($token->[0] eq 'T') || ($token->[0] eq 'C') ) {
426: if ($metamode<1) {
427: my $text=$token->[1];
428: if ($token->[0] eq 'C' && $target eq 'tex') {
429: $text = '';
430: # $text = '%'.$text."\n";
431: }
432: $result.=$text;
433: }
434: } elsif (($token->[0] eq 'D')) {
435: if ($metamode<1 && $target eq 'web') {
436: my $text=$token->[1];
437: $result.=$text;
438: }
439: } elsif ($token->[0] eq 'PI') {
440: if ($metamode<1 && $target eq 'web') {
441: $result=$token->[2];
442: }
443: } elsif ($token->[0] eq 'S') {
444: # add tag to stack
445: push (@$stack,$token->[1]);
446: # add parameters list to another stack
447: push (@$parstack,&parstring($token));
448: &increasedepth($token);
449: if ($Apache::lonxml::usestyle &&
450: exists($$style_for_target{$token->[1]})) {
451: $Apache::lonxml::usestyle=0;
452: my $string=$$style_for_target{$token->[1]}.
453: '<LONCAPA_INTERNAL_TURN_STYLE_ON />';
454: &Apache::lonxml::newparser($pars,\$string);
455: $Apache::lonxml::style_values=$$parstack[-1];
456: $Apache::lonxml::style_end_values=$$parstack[-1];
457: } else {
458: $result = &callsub("start_$token->[1]", $target, $token, $stack,
459: $parstack, $pars, $safeeval, $style_for_target);
460: }
461: } elsif ($token->[0] eq 'E') {
462: if ($Apache::lonxml::usestyle &&
463: exists($$style_for_target{'/'."$token->[1]"})) {
464: $Apache::lonxml::usestyle=0;
465: my $string=$$style_for_target{'/'.$token->[1]}.
466: '<LONCAPA_INTERNAL_TURN_STYLE_ON end="'.$token->[1].'" />';
467: &Apache::lonxml::newparser($pars,\$string);
468: $Apache::lonxml::style_values=$Apache::lonxml::style_end_values;
469: $Apache::lonxml::style_end_values='';
470: $dontpop=1;
471: } else {
472: #clear out any tags that didn't end
473: while ($token->[1] ne $$stack['-1'] && ($#$stack > -1)) {
474: my $lasttag=$$stack[-1];
475: if ($token->[1] =~ /^\Q$lasttag\E$/i) {
476: &Apache::lonxml::warning('Using tag </'.$token->[1].'> on line '.$token->[3].' as end tag to <'.$$stack[-1].'>');
477: last;
478: } else {
479: &Apache::lonxml::warning('Found tag </'.$token->[1].'> on line '.$token->[3].' when looking for </'.$$stack[-1].'> in file');
480: &end_tag($stack,$parstack,$token);
481: }
482: }
483: $result = &callsub("end_$token->[1]", $target, $token, $stack,
484: $parstack, $pars,$safeeval, $style_for_target);
485: }
486: } else {
487: &Apache::lonxml::error("Unknown token event :$token->[0]:$token->[1]:");
488: }
489: #evaluate variable refs in result
490: if ($Apache::lonxml::post_evaluate &&$result ne "") {
491: my $extras;
492: if (!$Apache::lonxml::usestyle) {
493: $extras=$Apache::lonxml::style_values;
494: }
495: if ( $#$parstack > -1 ) {
496: $result=&Apache::run::evaluate($result,$safeeval,$extras.$$parstack[-1]);
497: } else {
498: $result= &Apache::run::evaluate($result,$safeeval,$extras);
499: }
500: }
501: $Apache::lonxml::post_evaluate=1;
502:
503: if (($token->[0] eq 'T') || ($token->[0] eq 'C') || ($token->[0] eq 'D') ) {
504: #Style file definitions should be correct
505: if ($target eq 'tex' && ($Apache::lonxml::usestyle)) {
506: $result=&latex_special_symbols($result);
507: }
508: }
509:
510: if ($Apache::lonxml::redirection) {
511: $Apache::lonxml::outputstack['-1'] .= $result;
512: } else {
513: $finaloutput.=$result;
514: }
515: $result = '';
516:
517: if ($token->[0] eq 'E' && !$dontpop) {
518: &end_tag($stack,$parstack,$token);
519: }
520: $dontpop=0;
521: }
522: if ($#$pars > -1) {
523: pop @$pars;
524: pop @Apache::lonxml::pwd;
525: }
526: }
527:
528: # if ($target eq 'meta') {
529: # $finaloutput.=&endredirection;
530: # }
531:
532:
533: if (($ENV{'QUERY_STRING'}) && ($target eq 'web')) {
534: $finaloutput=&afterburn($finaloutput);
535: }
536: return $finaloutput;
537: }
538:
539: ##
540: ## Looks to see if there is a subroutine defined for this tag. If so, call it,
541: ## otherwise do not call it as we do not know what it is.
542: ##
543: sub callsub {
544: my ($sub,$target,$token,$tagstack,$parstack,$parser,$safeeval,$style)=@_;
545: my $currentstring='';
546: my $nodefault;
547: {
548: my $sub1;
549: no strict 'refs';
550: my $tag=$token->[1];
551: # get utterly rid of extended html tags
552: if ($tag=~/^x\-/i) { return ''; }
553: my $space=$Apache::lonxml::alltags{$tag}[-1];
554: if (!$space) {
555: $tag=~tr/A-Z/a-z/;
556: $sub=~tr/A-Z/a-z/;
557: $space=$Apache::lonxml::alltags{$tag}[-1]
558: }
559:
560: my $deleted=0;
561: $Apache::lonxml::curdepth=join('_',@Apache::lonxml::depthcounter);
562: if (($token->[0] eq 'S') && ($target eq 'modified')) {
563: $deleted=&Apache::edit::handle_delete($space,$target,$token,$tagstack,
564: $parstack,$parser,$safeeval,
565: $style);
566: }
567: if (!$deleted) {
568: if ($space) {
569: #&Apache::lonxml::debug("Calling sub $sub in $space $metamode");
570: $sub1="$space\:\:$sub";
571: ($currentstring,$nodefault) = &$sub1($target,$token,$tagstack,
572: $parstack,$parser,$safeeval,
573: $style);
574: } else {
575: if ($target eq 'tex') {
576: # throw away tag name
577: return '';
578: }
579: #&Apache::lonxml::debug("NOT Calling sub $sub in $space $metamode");
580: if ($metamode <1) {
581: if (defined($token->[4]) && ($metamode < 1)) {
582: $currentstring = $token->[4];
583: } else {
584: $currentstring = $token->[2];
585: }
586: }
587: }
588: # &Apache::lonxml::debug("nodefalt:$nodefault:");
589: if ($currentstring eq '' && $nodefault eq '') {
590: if ($target eq 'edit') {
591: #&Apache::lonxml::debug("doing default edit for $token->[1]");
592: if ($token->[0] eq 'S') {
593: $currentstring = &Apache::edit::tag_start($target,$token);
594: } elsif ($token->[0] eq 'E') {
595: $currentstring = &Apache::edit::tag_end($target,$token);
596: }
597: } elsif ($target eq 'modified') {
598: if ($token->[0] eq 'S') {
599: $currentstring = $token->[4];
600: $currentstring.=&Apache::edit::handle_insert();
601: } elsif ($token->[0] eq 'E') {
602: $currentstring = $token->[2];
603: $currentstring.=&Apache::edit::handle_insertafter($token->[1]);
604: } else {
605: $currentstring = $token->[2];
606: }
607: }
608: }
609: }
610: use strict 'refs';
611: }
612: return $currentstring;
613: }
614:
615: sub setup_globals {
616: my ($request,$target)=@_;
617: $Apache::lonxml::request=$request;
618: $Apache::lonxml::registered = 0;
619: @Apache::lonxml::htmlareafields=();
620: $errorcount=0;
621: $warningcount=0;
622: $Apache::lonxml::default_homework_loaded=0;
623: $Apache::lonxml::usestyle=1;
624: &init_counter();
625: @Apache::lonxml::pwd=();
626: @Apache::lonxml::extlinks=();
627: @Apache::lonxml::ssi_info=();
628: $Apache::lonxml::post_evaluate=1;
629: $Apache::lonxml::warnings_error_header='';
630: if ($target eq 'meta') {
631: $Apache::lonxml::redirection = 0;
632: $Apache::lonxml::metamode = 1;
633: $Apache::lonxml::evaluate = 1;
634: $Apache::lonxml::import = 0;
635: } elsif ($target eq 'answer') {
636: $Apache::lonxml::redirection = 0;
637: $Apache::lonxml::metamode = 1;
638: $Apache::lonxml::evaluate = 1;
639: $Apache::lonxml::import = 1;
640: } elsif ($target eq 'grade') {
641: &startredirection;
642: $Apache::lonxml::metamode = 0;
643: $Apache::lonxml::evaluate = 1;
644: $Apache::lonxml::import = 1;
645: } elsif ($target eq 'modified') {
646: $Apache::lonxml::redirection = 0;
647: $Apache::lonxml::metamode = 0;
648: $Apache::lonxml::evaluate = 0;
649: $Apache::lonxml::import = 0;
650: } elsif ($target eq 'edit') {
651: $Apache::lonxml::redirection = 0;
652: $Apache::lonxml::metamode = 0;
653: $Apache::lonxml::evaluate = 0;
654: $Apache::lonxml::import = 0;
655: } elsif ($target eq 'analyze') {
656: $Apache::lonxml::redirection = 0;
657: $Apache::lonxml::metamode = 0;
658: $Apache::lonxml::evaluate = 1;
659: $Apache::lonxml::import = 1;
660: } else {
661: $Apache::lonxml::redirection = 0;
662: $Apache::lonxml::metamode = 0;
663: $Apache::lonxml::evaluate = 1;
664: $Apache::lonxml::import = 1;
665: }
666: }
667:
668: sub init_safespace {
669: my ($target,$safeeval,$safehole,$safeinit) = @_;
670: $safeeval->permit("entereval");
671: $safeeval->permit(":base_math");
672: $safeeval->permit("sort");
673: $safeeval->permit("time");
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:
681: $safehole->wrap(\&Math::Cephes::asin,$safeeval,'&asin');
682: $safehole->wrap(\&Math::Cephes::acos,$safeeval,'&acos');
683: $safehole->wrap(\&Math::Cephes::atan,$safeeval,'&atan');
684: $safehole->wrap(\&Math::Cephes::sinh,$safeeval,'&sinh');
685: $safehole->wrap(\&Math::Cephes::cosh,$safeeval,'&cosh');
686: $safehole->wrap(\&Math::Cephes::tanh,$safeeval,'&tanh');
687: $safehole->wrap(\&Math::Cephes::asinh,$safeeval,'&asinh');
688: $safehole->wrap(\&Math::Cephes::acosh,$safeeval,'&acosh');
689: $safehole->wrap(\&Math::Cephes::atanh,$safeeval,'&atanh');
690: $safehole->wrap(\&Math::Cephes::erf,$safeeval,'&erf');
691: $safehole->wrap(\&Math::Cephes::erfc,$safeeval,'&erfc');
692: $safehole->wrap(\&Math::Cephes::j0,$safeeval,'&j0');
693: $safehole->wrap(\&Math::Cephes::j1,$safeeval,'&j1');
694: $safehole->wrap(\&Math::Cephes::jn,$safeeval,'&jn');
695: $safehole->wrap(\&Math::Cephes::jv,$safeeval,'&jv');
696: $safehole->wrap(\&Math::Cephes::y0,$safeeval,'&y0');
697: $safehole->wrap(\&Math::Cephes::y1,$safeeval,'&y1');
698: $safehole->wrap(\&Math::Cephes::yn,$safeeval,'&yn');
699: $safehole->wrap(\&Math::Cephes::yv,$safeeval,'&yv');
700:
701: $safehole->wrap(\&Math::Cephes::bdtr ,$safeeval,'&bdtr' );
702: $safehole->wrap(\&Math::Cephes::bdtrc ,$safeeval,'&bdtrc' );
703: $safehole->wrap(\&Math::Cephes::bdtri ,$safeeval,'&bdtri' );
704: $safehole->wrap(\&Math::Cephes::btdtr ,$safeeval,'&btdtr' );
705: $safehole->wrap(\&Math::Cephes::chdtr ,$safeeval,'&chdtr' );
706: $safehole->wrap(\&Math::Cephes::chdtrc,$safeeval,'&chdtrc');
707: $safehole->wrap(\&Math::Cephes::chdtri,$safeeval,'&chdtri');
708: $safehole->wrap(\&Math::Cephes::fdtr ,$safeeval,'&fdtr' );
709: $safehole->wrap(\&Math::Cephes::fdtrc ,$safeeval,'&fdtrc' );
710: $safehole->wrap(\&Math::Cephes::fdtri ,$safeeval,'&fdtri' );
711: $safehole->wrap(\&Math::Cephes::gdtr ,$safeeval,'&gdtr' );
712: $safehole->wrap(\&Math::Cephes::gdtrc ,$safeeval,'&gdtrc' );
713: $safehole->wrap(\&Math::Cephes::nbdtr ,$safeeval,'&nbdtr' );
714: $safehole->wrap(\&Math::Cephes::nbdtrc,$safeeval,'&nbdtrc');
715: $safehole->wrap(\&Math::Cephes::nbdtri,$safeeval,'&nbdtri');
716: $safehole->wrap(\&Math::Cephes::ndtr ,$safeeval,'&ndtr' );
717: $safehole->wrap(\&Math::Cephes::ndtri ,$safeeval,'&ndtri' );
718: $safehole->wrap(\&Math::Cephes::pdtr ,$safeeval,'&pdtr' );
719: $safehole->wrap(\&Math::Cephes::pdtrc ,$safeeval,'&pdtrc' );
720: $safehole->wrap(\&Math::Cephes::pdtri ,$safeeval,'&pdtri' );
721: $safehole->wrap(\&Math::Cephes::stdtr ,$safeeval,'&stdtr' );
722: $safehole->wrap(\&Math::Cephes::stdtri,$safeeval,'&stdtri');
723:
724: # $safehole->wrap(\&Math::Cephes::new_fract,$safeeval,'&new_fract');
725: # $safehole->wrap(\&Math::Cephes::radd,$safeeval,'&radd');
726: # $safehole->wrap(\&Math::Cephes::rsub,$safeeval,'&rsub');
727: # $safehole->wrap(\&Math::Cephes::rmul,$safeeval,'&rmul');
728: # $safehole->wrap(\&Math::Cephes::rdiv,$safeeval,'&rdiv');
729: # $safehole->wrap(\&Math::Cephes::euclid,$safeeval,'&euclid');
730:
731: $safehole->wrap(\&Math::Random::random_beta,$safeeval,'&math_random_beta');
732: $safehole->wrap(\&Math::Random::random_chi_square,$safeeval,'&math_random_chi_square');
733: $safehole->wrap(\&Math::Random::random_exponential,$safeeval,'&math_random_exponential');
734: $safehole->wrap(\&Math::Random::random_f,$safeeval,'&math_random_f');
735: $safehole->wrap(\&Math::Random::random_gamma,$safeeval,'&math_random_gamma');
736: $safehole->wrap(\&Math::Random::random_multivariate_normal,$safeeval,'&math_random_multivariate_normal');
737: $safehole->wrap(\&Math::Random::random_multinomial,$safeeval,'&math_random_multinomial');
738: $safehole->wrap(\&Math::Random::random_noncentral_chi_square,$safeeval,'&math_random_noncentral_chi_square');
739: $safehole->wrap(\&Math::Random::random_noncentral_f,$safeeval,'&math_random_noncentral_f');
740: $safehole->wrap(\&Math::Random::random_normal,$safeeval,'&math_random_normal');
741: $safehole->wrap(\&Math::Random::random_permutation,$safeeval,'&math_random_permutation');
742: $safehole->wrap(\&Math::Random::random_permuted_index,$safeeval,'&math_random_permuted_index');
743: $safehole->wrap(\&Math::Random::random_uniform,$safeeval,'&math_random_uniform');
744: $safehole->wrap(\&Math::Random::random_poisson,$safeeval,'&math_random_poisson');
745: $safehole->wrap(\&Math::Random::random_uniform_integer,$safeeval,'&math_random_uniform_integer');
746: $safehole->wrap(\&Math::Random::random_negative_binomial,$safeeval,'&math_random_negative_binomial');
747: $safehole->wrap(\&Math::Random::random_binomial,$safeeval,'&math_random_binomial');
748: $safehole->wrap(\&Math::Random::random_seed_from_phrase,$safeeval,'&random_seed_from_phrase');
749: $safehole->wrap(\&Math::Random::random_set_seed_from_phrase,$safeeval,'&random_set_seed_from_phrase');
750: $safehole->wrap(\&Math::Random::random_get_seed,$safeeval,'&random_get_seed');
751: $safehole->wrap(\&Math::Random::random_set_seed,$safeeval,'&random_set_seed');
752: $safehole->wrap(\&Apache::lonxml::error,$safeeval,'&LONCAPA_INTERNAL_ERROR');
753: $safehole->wrap(\&Apache::lonxml::debug,$safeeval,'&LONCAPA_INTERNAL_DEBUG');
754: $safehole->wrap(\&Apache::caparesponse::get_sigrange,$safeeval,'&LONCAPA_INTERNAL_get_sigrange');
755:
756: #need to inspect this class of ops
757: # $safeeval->deny(":base_orig");
758: $safeeval->permit("require");
759: $safeinit .= ';$external::target="'.$target.'";';
760: my $rndseed;
761: my ($symb,$courseid,$domain,$name) = &Apache::lonxml::whichuser();
762: $rndseed=&Apache::lonnet::rndseed($symb,$courseid,$domain,$name);
763: $safeinit .= ';$external::randomseed="'.$rndseed.'";';
764: &Apache::lonxml::debug("Setting rndseed to $rndseed");
765: &Apache::run::run($safeinit,$safeeval);
766:
767: }
768:
769: sub default_homework_load {
770: my ($safeeval)=@_;
771: &Apache::lonxml::debug('Loading default_homework');
772: my $default=&Apache::lonnet::getfile('/home/httpd/html/res/adm/includes/default_homework.lcpm');
773: if ($default eq -1) {
774: &Apache::lonxml::error("<b>Unable to find <i>default_homework.lcpm</i></b>");
775: } else {
776: &Apache::run::run($default,$safeeval);
777: $Apache::lonxml::default_homework_loaded=1;
778: }
779: }
780:
781: my $metamode_was;
782: sub startredirection {
783: if (!$Apache::lonxml::redirection) {
784: $metamode_was=$Apache::lonxml::metamode;
785: }
786: $Apache::lonxml::metamode=0;
787: $Apache::lonxml::redirection++;
788: push (@Apache::lonxml::outputstack, '');
789: }
790:
791: sub endredirection {
792: if (!$Apache::lonxml::redirection) {
793: &Apache::lonxml::error("Endredirection was called, before a startredirection, perhaps you have unbalanced tags. Some debuging information:".join ":",caller);
794: return '';
795: }
796: $Apache::lonxml::redirection--;
797: if (!$Apache::lonxml::redirection) {
798: $Apache::lonxml::metamode=$metamode_was;
799: }
800: pop @Apache::lonxml::outputstack;
801: }
802:
803: sub end_tag {
804: my ($tagstack,$parstack,$token)=@_;
805: pop(@$tagstack);
806: pop(@$parstack);
807: &decreasedepth($token);
808: }
809:
810: sub initdepth {
811: @Apache::lonxml::depthcounter=();
812: $Apache::lonxml::depth=-1;
813: $Apache::lonxml::olddepth=-1;
814: }
815:
816: sub increasedepth {
817: my ($token) = @_;
818: $Apache::lonxml::depth++;
819: $Apache::lonxml::depthcounter[$Apache::lonxml::depth]++;
820: if ($Apache::lonxml::depthcounter[$Apache::lonxml::depth]==1) {
821: $Apache::lonxml::olddepth=$Apache::lonxml::depth;
822: }
823: my $curdepth=join('_',@Apache::lonxml::depthcounter);
824: &Apache::lonxml::debug("s $Apache::lonxml::depth : $Apache::lonxml::olddepth : $curdepth : $token->[1]\n");
825: #print "<br />s $Apache::lonxml::depth : $Apache::lonxml::olddepth : $curdepth : $token->[1]\n";
826: }
827:
828: sub decreasedepth {
829: my ($token) = @_;
830: $Apache::lonxml::depth--;
831: if ($Apache::lonxml::depth<$Apache::lonxml::olddepth-1) {
832: $#Apache::lonxml::depthcounter--;
833: $Apache::lonxml::olddepth=$Apache::lonxml::depth+1;
834: }
835: if ( $Apache::lonxml::depth < -1) {
836: &Apache::lonxml::warning(&mt("Missing tags, unable to properly run file."));
837: $Apache::lonxml::depth='-1';
838: }
839: my $curdepth=join('_',@Apache::lonxml::depthcounter);
840: &Apache::lonxml::debug("e $Apache::lonxml::depth : $Apache::lonxml::olddepth : $token->[1] : $curdepth\n");
841: #print "<br />e $Apache::lonxml::depth : $Apache::lonxml::olddepth : $token->[1] : $curdepth\n";
842: }
843:
844: sub get_all_text_unbalanced {
845: #there is a copy of this in lonpublisher.pm
846: my($tag,$pars)= @_;
847: my $token;
848: my $result='';
849: $tag='<'.$tag.'>';
850: while ($token = $$pars[-1]->get_token) {
851: if (($token->[0] eq 'T')||($token->[0] eq 'C')||($token->[0] eq 'D')) {
852: $result.=$token->[1];
853: } elsif ($token->[0] eq 'PI') {
854: $result.=$token->[2];
855: } elsif ($token->[0] eq 'S') {
856: $result.=$token->[4];
857: } elsif ($token->[0] eq 'E') {
858: $result.=$token->[2];
859: }
860: if ($result =~ /\Q$tag\E/is) {
861: ($result,my $redo)=$result =~ /(.*)\Q$tag\E(.*)/is;
862: #&Apache::lonxml::debug('Got a winner with leftovers ::'.$2);
863: #&Apache::lonxml::debug('Result is :'.$1);
864: $redo=$tag.$redo;
865: &Apache::lonxml::newparser($pars,\$redo);
866: last;
867: }
868: }
869: return $result
870: }
871:
872: sub increment_counter {
873: my ($increment) = @_;
874: if (defined($increment) && $increment gt 0) {
875: $Apache::lonxml::counter+=$increment;
876: } else {
877: $Apache::lonxml::counter++;
878: }
879: $Apache::lonxml::counter_changed=1;
880: }
881:
882: sub init_counter {
883: if (defined($ENV{'form.counter'})) {
884: $Apache::lonxml::counter=$ENV{'form.counter'};
885: $Apache::lonxml::counter_changed=0;
886: } else {
887: $Apache::lonxml::counter=1;
888: $Apache::lonxml::counter_changed=1;
889: }
890: }
891:
892: sub store_counter {
893: &Apache::lonnet::appenv(('form.counter' => $Apache::lonxml::counter));
894: return '';
895: }
896:
897: sub get_all_text {
898: my($tag,$pars,$style)= @_;
899: my $gotfullstack=1;
900: if (ref($pars) ne 'ARRAY') {
901: $gotfullstack=0;
902: $pars=[$pars];
903: }
904: if (ref($style) ne 'HASH') {
905: $style={};
906: }
907: my $depth=0;
908: my $token;
909: my $result='';
910: if ( $tag =~ m:^/: ) {
911: my $tag=substr($tag,1);
912: #&Apache::lonxml::debug("have:$tag:");
913: my $top_empty=0;
914: while (($depth >=0) && ($#$pars > -1) && (!$top_empty)) {
915: while (($depth >=0) && ($token = $$pars[-1]->get_token)) {
916: #&Apache::lonxml::debug("e token:$token->[0]:$depth:$token->[1]:".$#$pars.":".$#Apache::lonxml::pwd);
917: if (($token->[0] eq 'T')||($token->[0] eq 'C')||($token->[0] eq 'D')) {
918: $result.=$token->[1];
919: } elsif ($token->[0] eq 'PI') {
920: $result.=$token->[2];
921: } elsif ($token->[0] eq 'S') {
922: if ($token->[1] =~ /^\Q$tag\E$/i) { $depth++; }
923: if ($token->[1] =~ /^LONCAPA_INTERNAL_TURN_STYLE_ON$/) { $Apache::lonxml::usestyle=1; }
924: if ($token->[1] =~ /^LONCAPA_INTERNAL_TURN_STYLE_OFF$/) { $Apache::lonxml::usestyle=0; }
925: $result.=$token->[4];
926: } elsif ($token->[0] eq 'E') {
927: if ( $token->[1] =~ /^\Q$tag\E$/i) { $depth--; }
928: #skip sending back the last end tag
929: if ($depth == 0 && exists($$style{'/'.$token->[1]}) && $Apache::lonxml::usestyle) {
930: my $string=
931: '<LONCAPA_INTERNAL_TURN_STYLE_OFF end="yes" />'.
932: $$style{'/'.$token->[1]}.
933: $token->[2].
934: '<LONCAPA_INTERNAL_TURN_STYLE_ON />';
935: &Apache::lonxml::newparser($pars,\$string);
936: #&Apache::lonxml::debug("reParsing $string");
937: next;
938: }
939: if ($depth > -1) {
940: $result.=$token->[2];
941: } else {
942: $$pars[-1]->unget_token($token);
943: }
944: }
945: }
946: if (($depth >=0) && ($#$pars == 0) ) { $top_empty=1; }
947: if (($depth >=0) && ($#$pars > 0) ) {
948: pop(@$pars);
949: pop(@Apache::lonxml::pwd);
950: }
951: }
952: if ($top_empty && $depth >= 0) {
953: #never found the end tag ran out of text, throw error send back blank
954: &error('Never found end tag for <'.$tag.
955: '> current string <pre>'.
956: &HTML::Entities::encode($result,'<>&"').
957: '</pre>');
958: if ($gotfullstack) {
959: my $newstring='</'.$tag.'>'.$result;
960: &Apache::lonxml::newparser($pars,\$newstring);
961: }
962: $result='';
963: }
964: } else {
965: while ($#$pars > -1) {
966: while ($token = $$pars[-1]->get_token) {
967: #&Apache::lonxml::debug("s token:$token->[0]:$depth:$token->[1]");
968: if (($token->[0] eq 'T')||($token->[0] eq 'C')||
969: ($token->[0] eq 'D')) {
970: $result.=$token->[1];
971: } elsif ($token->[0] eq 'PI') {
972: $result.=$token->[2];
973: } elsif ($token->[0] eq 'S') {
974: if ( $token->[1] =~ /^\Q$tag\E$/i) {
975: $$pars[-1]->unget_token($token); last;
976: } else {
977: $result.=$token->[4];
978: }
979: if ($token->[1] =~ /^LONCAPA_INTERNAL_TURN_STYLE_ON$/) { $Apache::lonxml::usestyle=1; }
980: if ($token->[1] =~ /^LONCAPA_INTERNAL_TURN_STYLE_OFF$/) { $Apache::lonxml::usestyle=0; }
981: } elsif ($token->[0] eq 'E') {
982: $result.=$token->[2];
983: }
984: }
985: if (($#$pars > 0) ) {
986: pop(@$pars);
987: pop(@Apache::lonxml::pwd);
988: } else { last; }
989: }
990: }
991: #&Apache::lonxml::debug("Exit:$result:");
992: return $result
993: }
994:
995: sub newparser {
996: my ($parser,$contentref,$dir) = @_;
997: push (@$parser,HTML::LCParser->new($contentref));
998: $$parser['-1']->xml_mode('1');
999: if ( $dir eq '' ) {
1000: push (@Apache::lonxml::pwd, $Apache::lonxml::pwd[$#Apache::lonxml::pwd]);
1001: } else {
1002: push (@Apache::lonxml::pwd, $dir);
1003: }
1004: }
1005:
1006: sub parstring {
1007: my ($token) = @_;
1008: my $temp='';
1009: foreach (@{$token->[3]}) {
1010: unless ($_=~/\W/) {
1011: my $val=$token->[2]->{$_};
1012: $val =~ s/([\%\@\\\"\'])/\\$1/g;
1013: #if ($val =~ m/^[\%\@]/) { $val="\\".$val; }
1014: $temp .= "my \$$_=\"$val\";";
1015: }
1016: }
1017: return $temp;
1018: }
1019:
1020: sub writeallows {
1021: unless ($#extlinks>=0) { return; }
1022: my $thisurl='/res/'.&Apache::lonnet::declutter(shift);
1023: if ($ENV{'httpref.'.$thisurl}) {
1024: $thisurl=$ENV{'httpref.'.$thisurl};
1025: }
1026: my $thisdir=$thisurl;
1027: $thisdir=~s/\/[^\/]+$//;
1028: my %httpref=();
1029: foreach (@extlinks) {
1030: $httpref{'httpref.'.
1031: &Apache::lonnet::hreflocation($thisdir,$_)}=$thisurl;
1032: }
1033: @extlinks=();
1034: &Apache::lonnet::appenv(%httpref);
1035: }
1036:
1037: sub register_ssi {
1038: my ($url,%form)=@_;
1039: push (@Apache::lonxml::ssi_info,{'url'=>$url,'form'=>\%form});
1040: return '';
1041: }
1042:
1043: sub do_registered_ssi {
1044: foreach my $info (@Apache::lonxml::ssi_info) {
1045: my %form=%{ $info->{'form'}};
1046: my $url=$info->{'url'};
1047: &Apache::lonnet::ssi($url,%form);
1048: }
1049: }
1050: #
1051: # Afterburner handles anchors, highlights and links
1052: #
1053: sub afterburn {
1054: my $result=shift;
1055: &Apache::loncommon::get_unprocessed_cgi($ENV{'QUERY_STRING'},
1056: ['highlight','anchor','link']);
1057: if ($ENV{'form.highlight'}) {
1058: foreach (split(/\,/,$ENV{'form.highlight'})) {
1059: my $anchorname=$_;
1060: my $matchthis=$anchorname;
1061: $matchthis=~s/\_+/\\s\+/g;
1062: $result=~s/(\Q$matchthis\E)/\<font color=\"red\"\>$1\<\/font\>/gs;
1063: }
1064: }
1065: if ($ENV{'form.link'}) {
1066: foreach (split(/\,/,$ENV{'form.link'})) {
1067: my ($anchorname,$linkurl)=split(/\>/,$_);
1068: my $matchthis=$anchorname;
1069: $matchthis=~s/\_+/\\s\+/g;
1070: $result=~s/(\Q$matchthis\E)/\<a href=\"$linkurl\"\>$1\<\/a\>/gs;
1071: }
1072: }
1073: if ($ENV{'form.anchor'}) {
1074: my $anchorname=$ENV{'form.anchor'};
1075: my $matchthis=$anchorname;
1076: $matchthis=~s/\_+/\\s\+/g;
1077: $result=~s/(\Q$matchthis\E)/\<a name=\"$anchorname\"\>$1\<\/a\>/s;
1078: $result.=(<<"ENDSCRIPT");
1079: <script type="text/javascript">
1080: document.location.hash='$anchorname';
1081: </script>
1082: ENDSCRIPT
1083: }
1084: return $result;
1085: }
1086:
1087: sub storefile {
1088: my ($file,$contents)=@_;
1089: &Apache::lonnet::correct_line_ends(\$contents);
1090: if (my $fh=Apache::File->new('>'.$file)) {
1091: print $fh $contents;
1092: $fh->close();
1093: return 1;
1094: } else {
1095: &warning("Unable to save file $file");
1096: return 0;
1097: }
1098: }
1099:
1100: sub createnewhtml {
1101: my $title=&mt('Title of document goes here');
1102: my $body=&mt('Body of document goes here');
1103: my $filecontents=(<<SIMPLECONTENT);
1104: <!DOCTYPE html PUBLIC "-//W3C//DTD XHTML 1.1//EN" "http://www.w3.org/TR/xhtml/11/DTD/xhtml11.dtd">
1105: <html>
1106: <head>
1107: <title>$title</title>
1108: </head>
1109: <body bgcolor="#FFFFFF">
1110: $body
1111: </body>
1112: </html>
1113: SIMPLECONTENT
1114: return $filecontents;
1115: }
1116:
1117: sub createnewsty {
1118: my $filecontents=(<<SIMPLECONTENT);
1119: <definetag name="">
1120: <render>
1121: <web></web>
1122: <tex></tex>
1123: </render>
1124: </definetag>
1125: SIMPLECONTENT
1126: return $filecontents;
1127: }
1128:
1129:
1130: sub inserteditinfo {
1131: my ($result,$filecontents,$filetype)=@_;
1132: $filecontents = &HTML::Entities::encode($filecontents,'<>&"');
1133: # my $editheader='<a href="#editsection">Edit below</a><hr />';
1134: my $xml_help = '';
1135: my $initialize='';
1136: if ($filetype eq 'html') {
1137: my $addbuttons=&Apache::lonhtmlcommon::htmlareaaddbuttons();
1138: $initialize=&Apache::lonhtmlcommon::htmlareaheaders().
1139: &Apache::lonhtmlcommon::spellheader().(<<FULLPAGE);
1140: <script type="text/javascript">
1141: $addbuttons
1142:
1143: HTMLArea.loadPlugin("FullPage");
1144:
1145: function initDocument() {
1146: var editor=new HTMLArea("filecont",config);
1147: editor.registerPlugin(FullPage);
1148: editor.generate();
1149: }
1150: </script>
1151: FULLPAGE
1152: $result=~s/\<body([^\>]*)\>/\<body onload="initDocument()" $1\>/i;
1153: $xml_help=&Apache::loncommon::helpLatexCheatsheet();
1154: }
1155: my $cleanbut = '';
1156: if ($filetype eq 'html') {
1157: $cleanbut='<input type="submit" name="attemptclean" value="'.
1158: &mt('Save and then attempt to clean HTML').'" />';
1159: }
1160: my $titledisplay=&display_title();
1161: my %lt=&Apache::lonlocal::texthash('st' => 'Save this',
1162: 'vi' => 'View',
1163: 'ed' => 'Edit');
1164: my $buttons=(<<BUTTONS);
1165: $cleanbut
1166: <input type="submit" name="savethisfile" accesskey="s" value="$lt{'st'}" />
1167: <input type="submit" name="viewmode" accesskey="v" value="$lt{'vi'}" />
1168: BUTTONS
1169: $buttons.=&Apache::lonhtmlcommon::spelllink('xmledit','filecont');
1170: my $editfooter=(<<ENDFOOTER);
1171: $initialize
1172: <hr />
1173: <a name="editsection" />
1174: <form method="post" name="xmledit">
1175: $xml_help
1176: <input type="hidden" name="editmode" value="$lt{'ed'}" />
1177: $buttons<br />
1178: <textarea cols="80" rows="44" name="filecont" id="filecont">$filecontents</textarea>
1179: <br />$buttons
1180: <br />
1181: </form>
1182: $titledisplay
1183: </body>
1184: ENDFOOTER
1185: # $result=~s/(\<body[^\>]*\>)/$1$editheader/is;
1186: $result=~s/(\<\/body\>)/$editfooter/is;
1187: return $result;
1188: }
1189:
1190: sub get_target {
1191: my $viewgrades=&Apache::lonnet::allowed('vgr',$ENV{'request.course.id'});
1192: if ( $ENV{'request.state'} eq 'published') {
1193: if ( defined($ENV{'form.grade_target'})
1194: && ($viewgrades == 'F' )) {
1195: return ($ENV{'form.grade_target'});
1196: } elsif (defined($ENV{'form.grade_target'})) {
1197: if (($ENV{'form.grade_target'} eq 'web') ||
1198: ($ENV{'form.grade_target'} eq 'tex') ) {
1199: return $ENV{'form.grade_target'}
1200: } else {
1201: return 'web';
1202: }
1203: } else {
1204: return 'web';
1205: }
1206: } elsif ($ENV{'request.state'} eq 'construct') {
1207: if ( defined($ENV{'form.grade_target'})) {
1208: return ($ENV{'form.grade_target'});
1209: } else {
1210: return 'web';
1211: }
1212: } else {
1213: return 'web';
1214: }
1215: }
1216:
1217: sub handler {
1218: my $request=shift;
1219:
1220: my $target=&get_target();
1221:
1222: $Apache::lonxml::debug=$ENV{'user.debug'};
1223:
1224: if ($ENV{'browser.mathml'}) {
1225: &Apache::loncommon::content_type($request,'text/xml');
1226: } else {
1227: &Apache::loncommon::content_type($request,'text/html');
1228: }
1229: &Apache::loncommon::no_cache($request);
1230: $request->send_http_header;
1231:
1232: return OK if $request->header_only;
1233:
1234:
1235: my $file=&Apache::lonnet::filelocation("",$request->uri);
1236: my $filetype;
1237: if ($file =~ /\.sty$/) {
1238: $filetype='sty';
1239: } else {
1240: $filetype='html';
1241: }
1242: #
1243: # Edit action? Save file.
1244: #
1245: unless ($ENV{'request.state'} eq 'published') {
1246: if (($ENV{'form.savethisfile'}) || ($ENV{'form.attemptclean'})) {
1247: if (&storefile($file,$ENV{'form.filecont'})) {
1248: &Apache::lonxml::info("<font COLOR=\"#0000FF\">".
1249: &mt('Updated').": ".
1250: &Apache::lonlocal::locallocaltime(time).
1251: " </font>");
1252: }
1253: }
1254: }
1255: my %mystyle;
1256: my $result = '';
1257: my $filecontents=&Apache::lonnet::getfile($file);
1258: if ($filecontents eq -1) {
1259: my $bodytag=&Apache::loncommon::bodytag('File Error');
1260: my $fnf=&mt('File not found');
1261: $result=(<<ENDNOTFOUND);
1262: <html>
1263: <head>
1264: <title>$fnf</title>
1265: </head>
1266: $bodytag
1267: <b>$fnf: $file</b>
1268: </body>
1269: </html>
1270: ENDNOTFOUND
1271: $filecontents='';
1272: if ($ENV{'request.state'} ne 'published') {
1273: if ($filetype eq 'sty') {
1274: $filecontents=&createnewsty();
1275: } else {
1276: $filecontents=&createnewhtml();
1277: }
1278: $ENV{'form.editmode'}='Edit'; #force edit mode
1279: }
1280: } else {
1281: unless ($ENV{'request.state'} eq 'published') {
1282: if ($ENV{'form.attemptclean'}) {
1283: $filecontents=&htmlclean($filecontents,1);
1284: }
1285: #
1286: # we are in construction space, see if edit mode forced
1287: &Apache::loncommon::get_unprocessed_cgi
1288: ($ENV{'QUERY_STRING'},['editmode']);
1289: }
1290: if (!$ENV{'form.editmode'} || $ENV{'form.viewmode'}) {
1291: $result = &Apache::lonxml::xmlparse($request,$target,$filecontents,
1292: '',%mystyle);
1293: }
1294: }
1295:
1296: #
1297: # Edit action? Insert editing commands
1298: #
1299: unless ($ENV{'request.state'} eq 'published') {
1300: if ($ENV{'form.editmode'} && (!($ENV{'form.viewmode'}))) {
1301: my $displayfile=$request->uri;
1302: $displayfile=~s/^\/[^\/]*//;
1303: $result='<html><body bgcolor="#FFFFFF">'.
1304: &Apache::lonxml::message_location().'<h3>'.
1305: $displayfile.
1306: '</h3></body></html>';
1307: $result=&inserteditinfo($result,$filecontents,$filetype);
1308: }
1309: }
1310: if ($filetype eq 'html') { writeallows($request->uri); }
1311:
1312:
1313: &Apache::lonxml::add_messages(\$result);
1314: $request->print($result);
1315:
1316: return OK;
1317: }
1318:
1319: sub display_title {
1320: my $result;
1321: if ($ENV{'request.state'} eq 'construct') {
1322: my $title=&Apache::lonnet::gettitle();
1323: if (!defined($title) || $title eq '') {
1324: $title = $ENV{'request.filename'};
1325: $title = substr($title, rindex($title, '/') + 1);
1326: }
1327: $result = "<script type='text/javascript'>top.document.title = '$title - LON-CAPA Construction Space';</script>";
1328: }
1329: return $result;
1330: }
1331:
1332: sub debug {
1333: if ($Apache::lonxml::debug eq "1") {
1334: $|=1;
1335: my $request=$Apache::lonxml::request;
1336: if (!$request) { $request=Apache->request; }
1337: $request->print('<font size="-2"><pre>DEBUG:'.&HTML::Entities::encode($_[0],'<>&"')."</pre></font>\n");
1338: # &Apache::lonnet::logthis($_[0]);
1339: }
1340: }
1341:
1342: sub error {
1343: $errorcount++;
1344: my $request=$Apache::lonxml::request;
1345: if (!$request) { $request=Apache->request; }
1346: if (($Apache::lonxml::debug eq 1) || ($ENV{'request.state'} eq 'construct') ) {
1347: # If printing in construction space, put the error inside <pre></pre>
1348: push(@Apache::lonxml::error_messages,
1349: $Apache::lonxml::warnings_error_header.
1350: "<b>ERROR:</b>".join("<br />\n",@_)."<br />\n");
1351: $Apache::lonxml::warnings_error_header='';
1352: } else {
1353: push(@Apache::lonxml::error_messages,
1354: "<b>An Error occured while processing this resource. The instructor has been notified.</b> <br />");
1355: #notify author
1356: &Apache::lonmsg::author_res_msg($ENV{'request.filename'},join('<br />',@_));
1357: #notify course
1358: if ( $ENV{'request.course.id'} ) {
1359: my (undef,%users)=&Apache::lonfeedback::decide_receiver(undef,0,1,1,1);
1360: my $declutter=&Apache::lonnet::declutter($ENV{'request.filename'});
1361: foreach (keys %users) {
1362: my ($user,$domain) = split(/:/, $_);
1363: &Apache::lonmsg::user_normal_msg($user,$domain,
1364: "Error [$declutter]",join('<br />',@_));
1365: }
1366: }
1367: }
1368: }
1369:
1370: sub warning {
1371: $warningcount++;
1372:
1373: if ($ENV{'form.grade_target'} ne 'tex') {
1374: if ($ENV{'request.state'} eq 'construct' || $Apache::lonxml::debug) {
1375: my $request=$Apache::lonxml::request;
1376: if (!$request) { $request=Apache->request; }
1377: push(@Apache::lonxml::warning_messages,
1378: $Apache::lonxml::warnings_error_header.
1379: "<b>W</b>ARNING<b>:</b>".join('<br />',@_)."<br />\n");
1380: $Apache::lonxml::warnings_error_header='';
1381: }
1382: }
1383: }
1384:
1385: sub info {
1386: if ($ENV{'form.grade_target'} ne 'tex'
1387: && $ENV{'request.state'} eq 'construct') {
1388: push(@Apache::lonxml::info_messages,join('<br />',@_)."<br />\n");
1389: }
1390: }
1391:
1392: sub message_location {
1393: return '__LONCAPA_INTERNAL_MESSAGE_LOCATION__';
1394: }
1395:
1396: sub add_messages {
1397: my ($msg)=@_;
1398: my $result=join(' ',
1399: @Apache::lonxml::info_messages,
1400: @Apache::lonxml::error_messages,
1401: @Apache::lonxml::warning_messages);
1402: undef(@Apache::lonxml::info_messages);
1403: undef(@Apache::lonxml::error_messages);
1404: undef(@Apache::lonxml::warning_messages);
1405: $$msg=~s/__LONCAPA_INTERNAL_MESSAGE_LOCATION__/$result/;
1406: $$msg=~s/__LONCAPA_INTERNAL_MESSAGE_LOCATION__//g;
1407: }
1408:
1409: sub get_param {
1410: my ($param,$parstack,$safeeval,$context,$case_insensitive) = @_;
1411: if ( ! $context ) { $context = -1; }
1412: my $args ='';
1413: if ( $#$parstack > (-2-$context) ) { $args=$$parstack[$context]; }
1414: if ( ! $Apache::lonxml::usestyle ) {
1415: $args=$Apache::lonxml::style_values.$args;
1416: }
1417: if ( ! $args ) { return undef; }
1418: if ( $case_insensitive ) {
1419: if ($args =~ s/(my \$)(\Q$param\E)(=\")/$1.lc($2).$3/ei) {
1420: return &Apache::run::run("{$args;".'return $'.$param.'}',
1421: $safeeval); #'
1422: } else {
1423: return undef;
1424: }
1425: } else {
1426: if ( $args =~ /my \$\Q$param\E=\"/ ) {
1427: return &Apache::run::run("{$args;".'return $'.$param.'}',
1428: $safeeval); #'
1429: } else {
1430: return undef;
1431: }
1432: }
1433: }
1434:
1435: sub get_param_var {
1436: my ($param,$parstack,$safeeval,$context,$case_insensitive) = @_;
1437: if ( ! $context ) { $context = -1; }
1438: my $args ='';
1439: if ( $#$parstack > (-2-$context) ) { $args=$$parstack[$context]; }
1440: if ( ! $Apache::lonxml::usestyle ) {
1441: $args=$Apache::lonxml::style_values.$args;
1442: }
1443: &Apache::lonxml::debug("Args are $args param is $param");
1444: if ($case_insensitive) {
1445: if (! ($args=~s/(my \$)(\Q$param\E)(=\")/$1.lc($2).$3/ei)) {
1446: return undef;
1447: }
1448: } elsif ( $args !~ /my \$\Q$param\E=\"/ ) { return undef; }
1449: my $value=&Apache::run::run("{$args;".'return $'.$param.'}',$safeeval); #'
1450: &Apache::lonxml::debug("first run is $value");
1451: if ($value =~ /^[\$\@\%]\w+$/) {
1452: &Apache::lonxml::debug("doing second");
1453: my @result=&Apache::run::run("return $value",$safeeval,1);
1454: if (!defined($result[0])) {
1455: return $value
1456: } else {
1457: if (wantarray) { return @result; } else { return $result[0]; }
1458: }
1459: } else {
1460: return $value;
1461: }
1462: }
1463:
1464: sub register_insert {
1465: my @data = split /\n/, &Apache::lonnet::getfile('/home/httpd/lonTabs/insertlist.tab');
1466: my $i;
1467: my $tagnum=0;
1468: my @order;
1469: for ($i=0;$i < $#data; $i++) {
1470: my $line = $data[$i];
1471: if ( $line =~ /^\#/ || $line =~ /^\s*\n/) { next; }
1472: if ( $line =~ /TABLE/ ) { last; }
1473: my ($tag,$descrip,$color,$function,$show,$helpfile,$helpdesc) = split(/,/, $line);
1474: if ($tag) {
1475: $insertlist{"$tagnum.tag"} = $tag;
1476: $insertlist{"$tagnum.description"} = $descrip;
1477: $insertlist{"$tagnum.color"} = $color;
1478: $insertlist{"$tagnum.function"} = $function;
1479: if (!defined($show)) { $show='yes'; }
1480: $insertlist{"$tagnum.show"}= $show;
1481: $insertlist{"$tagnum.helpfile"} = $helpfile;
1482: $insertlist{"$tagnum.helpdesc"} = $helpdesc;
1483: $insertlist{"$tag.num"}=$tagnum;
1484: $tagnum++;
1485: }
1486: }
1487: $i++; #skipping TABLE line
1488: $tagnum = 0;
1489: for (;$i < $#data;$i++) {
1490: my $line = $data[$i];
1491: my ($mnemonic,@which) = split(/ +/,$line);
1492: my $tag = $insertlist{"$tagnum.tag"};
1493: for (my $j=0;$j <=$#which;$j++) {
1494: if ( $which[$j] eq 'Y' ) {
1495: if ($insertlist{"$j.show"} ne 'no') {
1496: push(@{ $insertlist{"$tag.which"} },$j);
1497: }
1498: }
1499: }
1500: $tagnum++;
1501: }
1502: }
1503:
1504: sub description {
1505: my ($token)=@_;
1506: my $tagnum;
1507: my $tag=$token->[1];
1508: foreach my $namespace (reverse @Apache::lonxml::namespace) {
1509: my $testtag=$namespace.'::'.$tag;
1510: $tagnum=$insertlist{"$testtag.num"};
1511: if (defined($tagnum)) { last; }
1512: }
1513: if (!defined ($tagnum)) { $tagnum=$Apache::lonxml::insertlist{"$tag.num"}; }
1514: return $insertlist{$tagnum.'.description'};
1515: }
1516:
1517: # Returns a list containing the help file, and the description
1518: sub helpinfo {
1519: my ($token)=@_;
1520: my $tagnum;
1521: my $tag=$token->[1];
1522: foreach my $namespace (reverse @Apache::lonxml::namespace) {
1523: my $testtag=$namespace.'::'.$tag;
1524: $tagnum=$insertlist{"$testtag.num"};
1525: if (defined($tagnum)) { last; }
1526: }
1527: if (!defined ($tagnum)) { $tagnum=$Apache::lonxml::insertlist{"$tag.num"}; }
1528: return ($insertlist{$tagnum.'.helpfile'}, $insertlist{$tagnum.'.helpdesc'});
1529: }
1530:
1531: # ----------------------------------------------------------------- whichuser
1532: # returns a list of $symb, $courseid, $domain, $name that is correct for
1533: # calls to lonnet functions for this setup.
1534: # - looks for form.grade_ parameters
1535: sub whichuser {
1536: my ($passedsymb)=@_;
1537: my ($symb,$courseid,$domain,$name,$publicuser);
1538: if (defined($ENV{'form.grade_symb'})) {
1539: my $tmp_courseid=$ENV{'form.grade_courseid'};
1540: my $allowed=&Apache::lonnet::allowed('vgr',$tmp_courseid);
1541: if ($allowed) {
1542: $symb=$ENV{'form.grade_symb'};
1543: $courseid=$ENV{'form.grade_courseid'};
1544: $domain=$ENV{'form.grade_domain'};
1545: $name=$ENV{'form.grade_username'};
1546: }
1547: } else {
1548: if (!$passedsymb) {
1549: $symb=&Apache::lonnet::symbread();
1550: } else {
1551: $symb=$passedsymb;
1552: }
1553: $courseid=$ENV{'request.course.id'};
1554: $domain=$ENV{'user.domain'};
1555: $name=$ENV{'user.name'};
1556: if ($name eq 'public' && $domain eq 'public') {
1557: if (!defined($ENV{'form.username'})) {
1558: $ENV{'form.username'}.=time.rand(10000000);
1559: }
1560: $name.=$ENV{'form.username'};
1561: }
1562: }
1563: return ($symb,$courseid,$domain,$name,$publicuser);
1564: }
1565:
1566: 1;
1567: __END__
1568:
1569:
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