1: # The LearningOnline Network with CAPA
2: # XML Parser Module
3: #
4: # last modified 06/26/00 by Alexander Sakharuk
5: # 11/6 Gerd Kortemeyer
6: # 6/1/1 Gerd Kortemeyer
7: # 2/21,3/13 Guy
8: # 3/29,5/4 Gerd Kortemeyer
9: # 5/10 Scott Harrison
10: # 5/26 Gerd Kortemeyer
11: # 5/27 H. K. Ng
12: # 6/2,6/3,6/8,6/9 Gerd Kortemeyer
13: # 6/12,6/13 H. K. Ng
14: # 6/16 Gerd Kortemeyer
15: # 7/27 H. K. Ng
16: # 8/7,8/9,8/10,8/11,8/15 Gerd Kortemeyer
17:
18: package Apache::lonxml;
19: use vars
20: qw(@pwd @outputstack $redirection $import @extlinks $metamode $evaluate %insertlist @namespace);
21: use strict;
22: use HTML::TokeParser;
23: use HTML::TreeBuilder;
24: use Safe;
25: use Safe::Hole;
26: use Math::Cephes qw(:trigs :hypers :bessels erf erfc);
27: use Math::Random qw(:all);
28: use Opcode;
29:
30: sub register {
31: my $space;
32: my @taglist;
33: my $temptag;
34: ($space,@taglist) = @_;
35: foreach $temptag (@taglist) {
36: $Apache::lonxml::alltags{$temptag}=$space;
37: }
38: }
39:
40: use Apache::Constants qw(:common);
41: use Apache::lontexconvert;
42: use Apache::style;
43: use Apache::run;
44: use Apache::londefdef;
45: use Apache::scripttag;
46: use Apache::edit;
47: use Apache::lonnet;
48: use Apache::File;
49:
50: #================================================== Main subroutine: xmlparse
51: #debugging control, to turn on debugging modify the correct handler
52: $Apache::lonxml::debug=0;
53:
54: #path to the directory containing the file currently being processed
55: @pwd=();
56:
57: #these two are used for capturing a subset of the output for later processing,
58: #don't touch them directly use &startredirection and &endredirection
59: @outputstack = ();
60: $redirection = 0;
61:
62: #controls wheter the <import> tag actually does
63: $import = 1;
64: @extlinks=();
65:
66: # meta mode is a bit weird only some output is to be turned off
67: #<output> tag turns metamode off (defined in londefdef.pm)
68: $metamode = 0;
69:
70: # turns on and of run::evaluate actually derefencing var refs
71: $evaluate = 1;
72:
73: # data structure for eidt mode, determines what tags can go into what other tags
74: %insertlist=();
75:
76: # stores the list of active tag namespaces
77: @namespace=();
78:
79: # has the dynamic menu been updated to know about this resource
80: $Apache::lonxml::registered=0;
81:
82: sub xmlbegin {
83: my $output='';
84: if ($ENV{'browser.mathml'}) {
85: $output='<?xml version="1.0"?>'
86: .'<?xml-stylesheet type="text/css" href="/adm/MathML/mathml.css"?>'
87: .'<!DOCTYPE html SYSTEM "/adm/MathML/mathml.dtd" '
88: .'[<!ENTITY mathns "http://www.w3.org/1998/Math/MathML">]>'
89: .'<html xmlns:math="http://www.w3.org/1998/Math/MathML" '
90: .'xmlns="http://www.w3.org/TR/REC-html40">';
91: } else {
92: $output='<html>';
93: }
94: return $output;
95: }
96:
97: sub xmlend {
98: my $discussion='';
99: if ($ENV{'request.course.id'}) {
100: my $crs='/'.$ENV{'request.course.id'};
101: if ($ENV{'request.course.sec'}) {
102: $crs.='_'.$ENV{'request.course.sec'};
103: }
104: $crs=~s/\_/\//g;
105: my $seeid=&Apache::lonnet::allowed('rin',$crs);
106: my $symb=&Apache::lonnet::symbread();
107: if ($symb) {
108: my %contrib=&Apache::lonnet::restore($symb,$ENV{'request.course.id'},
109: $ENV{'course.'.$ENV{'request.course.id'}.'.domain'},
110: $ENV{'course.'.$ENV{'request.course.id'}.'.num'});
111: if ($contrib{'version'}) {
112: $discussion.=
113: '<address><hr /><h2>Course Discussion of Resource</h2>';
114: my $idx;
115: for ($idx=1;$idx<=$contrib{'version'};$idx++) {
116: my $hidden=($contrib{'hidden'}=~/\.$idx\./);
117: unless (($hidden) && (!$seeid)) {
118: my $message=$contrib{$idx.':message'};
119: $message=~s/\n/\<br \/\>/g;
120: if ($message) {
121: if ($hidden) {
122: $message='<font color="#888888">'.$message.'</font>';
123: }
124: my $sender='Anonymous';
125: if ((!$contrib{$idx.':anonymous'}) || ($seeid)) {
126: $sender=$contrib{$idx.':sendername'}.' at '.
127: $contrib{$idx.':senderdomain'};
128: if ($contrib{$idx.':anonymous'}) {
129: $sender.=' (anonymous)';
130: }
131: if ($seeid) {
132: if ($hidden) {
133: $sender.=' <a href="/adm/feedback?unhide='.
134: $symb.':::'.$idx.'">Make Visible</a>';
135: } else {
136: $sender.=' <a href="/adm/feedback?hide='.
137: $symb.':::'.$idx.'">Hide</a>';
138: }
139: }
140: }
141: $discussion.='<p><b>'.$sender.'</b> ('.
142: localtime($contrib{$idx.':timestamp'}).
143: '):<blockquote>'.$message.
144: '</blockquote></p>';
145: }
146: }
147: }
148: $discussion.='</address>';
149: }
150: }
151: }
152: return $discussion.'</html>';
153: }
154:
155: sub checkout {
156: my ($target,$symb,$tuname,$tudom,$tcrsid)=@_;
157: unless ($symb) {
158: $symb=&Apache::lonnet::symbread();
159: }
160: unless ($tuname) {
161: $tuname=$ENV{'user.name'};
162: $tudom=$ENV{'user.domain'};
163: $tcrsid=$ENV{'request.course.id'};
164: }
165: my $lonhost = $Apache::lonnet::perlvar{'lonHostID'};
166: my $infostr=&Apache::lonnet::escape(
167: $tuname.'&'.
168: $tudom.'&'.
169: $tcrsid.'&'.
170: $symb.'&'.
171: time.'&'.$ENV{'REMOTE_ADDR'});
172: my $token=Apache::lonnet::reply('tmpput:'.$infostr,$lonhost);
173: if ($token=~/^error\:/) { return ''; }
174: $token=~s/^(\d+)\_.*\_(\d+)$/$1\*$2\*$lonhost/;
175: $token=~tr/a-z/A-Z/;
176: if (&Apache::lonnet::log($tudom,$tuname,
177: &Apache::lonnet::homeserver($tuname,$tudom),
178: &Apache::lonnet::escape('Checkout '.$infostr.' - '.
179: $token)) ne 'ok') {
180: return '';
181: }
182: if ($target eq 'web') {
183: return '<img src="/cgi-bin/barcode.gif?encode='.$token.'" />';
184: } else {
185: return $token;
186: }
187: }
188:
189: sub fontsettings() {
190: my $headerstring='';
191: if (($ENV{'browser.os'} eq 'mac') && (!$ENV{'browser.mathml'})) {
192: $headerstring.=
193: '<meta Content-Type="text/html; charset=x-mac-roman">';
194: }
195: return $headerstring;
196: }
197:
198: sub registerurl {
199: my $forcereg=shift;
200: if ($Apache::lonxml::registered) { return ''; }
201: $Apache::lonxml::registered=1;
202: if (($ENV{'REQUEST_URI'}!~/^\/(res\/)*adm\//) || ($forcereg)) {
203: my $hwkadd='';
204: if ($ENV{'REQUEST_URI'}=~/\.(problem|exam|quiz|assess|survey|form)$/) {
205: if (&Apache::lonnet::allowed('vgr',$ENV{'request.course.id'})) {
206: $hwkadd.=(<<ENDSUBM);
207: menu.switchbutton
208: (7,1,'subm.gif','view sub','missions',
209: 'gocmd("/adm/grades","submission")');
210: ENDSUBM
211: }
212: if (&Apache::lonnet::allowed('mgr',$ENV{'request.course.id'})) {
213: $hwkadd.=(<<ENDGRDS);
214: menu.switchbutton
215: (7,2,'pgrd.gif','problem','grades',
216: 'gocmd("/adm/grades","viewgrades")');
217: ENDGRDS
218: }
219: if (&Apache::lonnet::allowed('opa',$ENV{'request.course.id'})) {
220: $hwkadd.=(<<ENDPARM);
221: menu.switchbutton
222: (7,3,'pparm.gif','problem','parms',
223: 'gocmd("/adm/parmset","set")');
224: ENDPARM
225: }
226: }
227: return (<<ENDREGTHIS);
228:
229: <script language="JavaScript">
230: // BEGIN LON-CAPA Internal
231:
232: function LONCAPAreg() {
233: menu=window.open("","LONCAPAmenu");
234: menu.clearTimeout(menu.menucltim);
235: menu.currentURL=window.location.pathname;
236: menu.currentStale=0;
237: menu.clearbut(3,1);
238: menu.switchbutton
239: (6,3,'catalog.gif','catalog','info','catalog_info()');
240: menu.switchbutton
241: (8,1,'eval.gif','evaluate','this','gopost("/adm/evaluate",currentURL)');
242: menu.switchbutton
243: (8,2,'fdbk.gif','feedback','on this','gopost("/adm/feedback",currentURL)');
244: menu.switchbutton
245: (8,3,'prt.gif','prepare','printout','gopost("/adm/printout",currentURL)');
246: menu.switchbutton
247: (2,1,'back.gif','backward','','gopost("/adm/flip","back:"+currentURL)');
248: menu.switchbutton
249: (2,3,'forw.gif','forward','','gopost("/adm/flip","forward:"+currentURL)');
250: menu.switchbutton
251: (9,1,'sbkm.gif','set','bookmark','set_bookmark()');
252: menu.switchbutton
253: (9,2,'vbkm.gif','view','bookmark','edit_bookmarks()');
254: menu.switchbutton
255: (9,3,'anot.gif','anno-','tations','annotate()');
256: $hwkadd
257: }
258:
259: function LONCAPAstale() {
260: menu=window.open("","LONCAPAmenu");
261: menu.currentStale=1;
262: menu.switchbutton
263: (3,1,'reload.gif','return','location','go(currentURL)');
264: menu.clearbut(7,1);
265: menu.clearbut(7,2);
266: menu.clearbut(7,3);
267: menu.menucltim=menu.setTimeout(
268: 'clearbut(2,1);clearbut(2,3);clearbut(8,1);clearbut(8,2);clearbut(8,3);'+
269: 'clearbut(9,1);clearbut(9,2);clearbut(9,3);clearbut(6,3)',
270: 2000);
271:
272: }
273:
274: // END LON-CAPA Internal
275: </script>
276: ENDREGTHIS
277:
278: } else {
279: return (<<ENDDONOTREGTHIS);
280:
281: <script language="JavaScript">
282: // BEGIN LON-CAPA Internal
283:
284: function LONCAPAreg() {
285: menu=window.open("","LONCAPAmenu");
286: menu.currentStale=1;
287: menu.clearbut(2,1);
288: menu.clearbut(2,3);
289: menu.clearbut(8,1);
290: menu.clearbut(8,2);
291: menu.clearbut(8,3);
292: if (menu.currentURL) {
293: menu.switchbutton
294: (3,1,'reload.gif','return','location','go(currentURL)');
295: } else {
296: menu.clearbut(3,1);
297: }
298: }
299:
300: function LONCAPAstale() {
301: }
302:
303: // END LON-CAPA Internal
304: </script>
305: ENDDONOTREGTHIS
306:
307: }
308: }
309:
310: sub loadevents() {
311: return 'LONCAPAreg();';
312: }
313:
314: sub unloadevents() {
315: return 'LONCAPAstale();';
316: }
317:
318: sub printalltags {
319: my $temp;
320: foreach $temp (sort keys %Apache::lonxml::alltags) {
321: &Apache::lonxml::debug("$temp -- $Apache::lonxml::alltags{$temp}");
322: }
323: }
324:
325: sub xmlparse {
326: my ($target,$content_file_string,$safeinit,%style_for_target) = @_;
327:
328: &setup_globals($target);
329: #&printalltags();
330: my @pars = ();
331: my $pwd=$ENV{'request.filename'};
332: $pwd =~ s:/[^/]*$::;
333: &newparser(\@pars,\$content_file_string,$pwd);
334:
335: my $safeeval = new Safe;
336: my $safehole = new Safe::Hole;
337: &init_safespace($target,$safeeval,$safehole,$safeinit);
338: #-------------------- Redefinition of the target in the case of compound target
339:
340: ($target, my @tenta) = split('&&',$target);
341:
342: my @stack = ();
343: my @parstack = ();
344: &initdepth;
345:
346: my $finaloutput = &inner_xmlparse($target,\@stack,\@parstack,\@pars,
347: $safeeval,\%style_for_target);
348:
349: return $finaloutput;
350: }
351:
352: sub htmlclean {
353: my ($raw,$full)=@_;
354:
355: my $tree = HTML::TreeBuilder->new;
356: $tree->ignore_unknown(0);
357:
358: $tree->parse($raw);
359:
360: my $output= $tree->as_HTML(undef,' ');
361:
362: $output=~s/\<(br|hr|img|meta|allow)([^\>\/]*)\>/\<$1$2 \/\>/gis;
363: $output=~s/\<\/(br|hr|img|meta|allow)\>//gis;
364: unless ($full) {
365: $output=~s/\<[\/]*(body|head|html)\>//gis;
366: }
367:
368: $tree = $tree->delete;
369:
370: return $output;
371: }
372:
373: sub inner_xmlparse {
374: my ($target,$stack,$parstack,$pars,$safeeval,$style_for_target)=@_;
375: &Apache::lonxml::debug('Reentrant parser starting, again?');
376: my $finaloutput = '';
377: my $result;
378: my $token;
379: while ( $#$pars > -1 ) {
380: while ($token = $$pars['-1']->get_token) {
381: if (($token->[0] eq 'T') || ($token->[0] eq 'C') || ($token->[0] eq 'D') ) {
382: if ($metamode<1) {
383: $result=$token->[1];
384: }
385: } elsif ($token->[0] eq 'PI') {
386: if ($metamode<1) {
387: $result=$token->[2];
388: }
389: } elsif ($token->[0] eq 'S') {
390: # add tag to stack
391: push (@$stack,$token->[1]);
392: # add parameters list to another stack
393: push (@$parstack,&parstring($token));
394: &increasedepth($token);
395: if (exists $$style_for_target{$token->[1]}) {
396: if ($Apache::lonxml::redirection) {
397: $Apache::lonxml::outputstack['-1'] .=
398: &recurse($$style_for_target{$token->[1]},$target,$safeeval,
399: $style_for_target,@$parstack);
400: } else {
401: $finaloutput .= &recurse($$style_for_target{$token->[1]},$target,
402: $safeeval,$style_for_target,@$parstack);
403: }
404: } else {
405: $result = &callsub("start_$token->[1]", $target, $token, $stack,
406: $parstack, $pars, $safeeval, $style_for_target);
407: }
408: } elsif ($token->[0] eq 'E') {
409: #clear out any tags that didn't end
410: while ($token->[1] ne $$stack['-1'] && ($#$stack > -1)) {
411: &Apache::lonxml::warning("Unbalanced tags in resource $$stack['-1']");
412: &end_tag($stack,$parstack,$token);
413: }
414:
415: if (exists $$style_for_target{'/'."$token->[1]"}) {
416: if ($Apache::lonxml::redirection) {
417: $Apache::lonxml::outputstack['-1'] .=
418: &recurse($$style_for_target{'/'."$token->[1]"},
419: $target,$safeeval,$style_for_target,@$parstack);
420: } else {
421: $finaloutput .= &recurse($$style_for_target{'/'."$token->[1]"},
422: $target,$safeeval,$style_for_target,
423: @$parstack);
424: }
425:
426: } else {
427: $result = &callsub("end_$token->[1]", $target, $token, $stack,
428: $parstack, $pars,$safeeval, $style_for_target);
429: }
430: } else {
431: &Apache::lonxml::error("Unknown token event :$token->[0]:$token->[1]:");
432: }
433: #evaluate variable refs in result
434: if ($result ne "") {
435: if ( $#$parstack > -1 ) {
436: if ($Apache::lonxml::redirection) {
437: $Apache::lonxml::outputstack['-1'] .=
438: &Apache::run::evaluate($result,$safeeval,$$parstack['-1']);
439: } else {
440: $finaloutput .= &Apache::run::evaluate($result,$safeeval,
441: $$parstack['-1']);
442: }
443: } else {
444: $finaloutput .= &Apache::run::evaluate($result,$safeeval,'');
445: }
446: $result = '';
447: }
448: if ($token->[0] eq 'E') {
449: &end_tag($stack,$parstack,$token);
450: }
451: }
452: pop @$pars;
453: pop @Apache::lonxml::pwd;
454: }
455:
456: # if ($target eq 'meta') {
457: # $finaloutput.=&endredirection;
458: # }
459:
460: if (($ENV{'QUERY_STRING'}) && ($target eq 'web')) {
461: $finaloutput=&afterburn($finaloutput);
462: }
463: return $finaloutput;
464: }
465:
466: sub recurse {
467: my @innerstack = ();
468: my @innerparstack = ();
469: my ($newarg,$target,$safeeval,$style_for_target,@parstack) = @_;
470: my @pat = ();
471: &newparser(\@pat,\$newarg);
472: my $tokenpat;
473: my $partstring = '';
474: my $output='';
475: my $decls='';
476: while ( $#pat > -1 ) {
477: while ($tokenpat = $pat[$#pat]->get_token) {
478: if (($tokenpat->[0] eq 'T') || ($tokenpat->[0] eq 'C') || ($tokenpat->[0] eq 'D') ) {
479: if ($metamode<1) { $partstring=$tokenpat->[1]; }
480: } elsif ($tokenpat->[0] eq 'PI') {
481: if ($metamode<1) { $partstring=$tokenpat->[2]; }
482: } elsif ($tokenpat->[0] eq 'S') {
483: push (@innerstack,$tokenpat->[1]);
484: push (@innerparstack,&parstring($tokenpat));
485: &increasedepth($tokenpat);
486: $partstring = &callsub("start_$tokenpat->[1]", $target, $tokenpat,
487: \@innerstack, \@innerparstack, \@pat,
488: $safeeval, $style_for_target);
489: } elsif ($tokenpat->[0] eq 'E') {
490: #clear out any tags that didn't end
491: while ($tokenpat->[1] ne $innerstack[$#innerstack]
492: && ($#innerstack > -1)) {
493: &Apache::lonxml::warning("Unbalanced tags in resource $innerstack['-1']");
494: &end_tag(\@innerstack,\@innerparstack,$tokenpat);
495: }
496: $partstring = &callsub("end_$tokenpat->[1]", $target, $tokenpat,
497: \@innerstack, \@innerparstack, \@pat,
498: $safeeval, $style_for_target);
499: } else {
500: &Apache::lonxml::error("Unknown token event :$tokenpat->[0]:$tokenpat->[1]:");
501: }
502: #pass both the variable to the style tag, and the tag we
503: #are processing inside the <definedtag>
504: if ( $partstring ne "" ) {
505: if ( $#parstack > -1 ) {
506: if ( $#innerparstack > -1 ) {
507: $decls= $parstack[$#parstack].$innerparstack[$#innerparstack];
508: } else {
509: $decls= $parstack[$#parstack];
510: }
511: } else {
512: if ( $#innerparstack > -1 ) {
513: $decls=$innerparstack[$#innerparstack];
514: } else {
515: $decls='';
516: }
517: }
518: $output .= &Apache::run::evaluate($partstring,$safeeval,$decls);
519: $partstring = '';
520: }
521: if ($tokenpat->[0] eq 'E') { pop @innerstack;pop @innerparstack;
522: &decreasedepth($tokenpat);}
523: }
524: pop @pat;
525: pop @Apache::lonxml::pwd;
526: }
527: return $output;
528: }
529:
530: sub callsub {
531: my ($sub,$target,$token,$tagstack,$parstack,$parser,$safeeval,$style)=@_;
532: my $currentstring='';
533: my $nodefault;
534: {
535: my $sub1;
536: no strict 'refs';
537: my $tag=$token->[1];
538: my $space=$Apache::lonxml::alltags{$tag};
539: if (!$space) {
540: $tag=~tr/A-Z/a-z/;
541: $sub=~tr/A-Z/a-z/;
542: $space=$Apache::lonxml::alltags{$tag}
543: }
544:
545: my $deleted=0;
546: $Apache::lonxml::curdepth=join('_',@Apache::lonxml::depthcounter);
547: if (($token->[0] eq 'S') && ($target eq 'modified')) {
548: $deleted=&Apache::edit::handle_delete($space,$target,$token,$tagstack,
549: $parstack,$parser,$safeeval,
550: $style);
551: }
552: if (!$deleted) {
553: if ($space) {
554: #&Apache::lonxml::debug("Calling sub $sub in $space $metamode<br />\n");
555: $sub1="$space\:\:$sub";
556: ($currentstring,$nodefault) = &$sub1($target,$token,$tagstack,
557: $parstack,$parser,$safeeval,
558: $style);
559: } else {
560: #&Apache::lonxml::debug("NOT Calling sub $sub in $space $metamode<br />\n");
561: if ($metamode <1) {
562: if (defined($token->[4]) && ($metamode < 1)) {
563: $currentstring = $token->[4];
564: } else {
565: $currentstring = $token->[2];
566: }
567: }
568: }
569: # &Apache::lonxml::debug("nodefalt:$nodefault:");
570: if ($currentstring eq '' && $nodefault eq '') {
571: if ($target eq 'edit') {
572: &Apache::lonxml::debug("doing default edit for $token->[1]");
573: if ($token->[0] eq 'S') {
574: $currentstring = &Apache::edit::tag_start($target,$token);
575: } elsif ($token->[0] eq 'E') {
576: $currentstring = &Apache::edit::tag_end($target,$token);
577: }
578: } elsif ($target eq 'modified') {
579: if ($token->[0] eq 'S') {
580: $currentstring = $token->[4];
581: $currentstring.=&Apache::edit::handle_insert();
582: } else {
583: $currentstring = $token->[2];
584: }
585: }
586: }
587: }
588: use strict 'refs';
589: }
590: return $currentstring;
591: }
592:
593: sub setup_globals {
594: my ($target)=@_;
595: $Apache::lonxml::registered = 0;
596: @Apache::lonxml::pwd=();
597: if ($target eq 'meta') {
598: $Apache::lonxml::redirection = 0;
599: $Apache::lonxml::metamode = 1;
600: $Apache::lonxml::evaluate = 1;
601: $Apache::lonxml::import = 0;
602: } elsif ($target eq 'grade') {
603: &startredirection;
604: $Apache::lonxml::metamode = 0;
605: $Apache::lonxml::evaluate = 1;
606: $Apache::lonxml::import = 1;
607: } elsif ($target eq 'modified') {
608: $Apache::lonxml::redirection = 0;
609: $Apache::lonxml::metamode = 0;
610: $Apache::lonxml::evaluate = 0;
611: $Apache::lonxml::import = 0;
612: } elsif ($target eq 'edit') {
613: $Apache::lonxml::redirection = 0;
614: $Apache::lonxml::metamode = 0;
615: $Apache::lonxml::evaluate = 0;
616: $Apache::lonxml::import = 0;
617: } else {
618: $Apache::lonxml::redirection = 0;
619: $Apache::lonxml::metamode = 0;
620: $Apache::lonxml::evaluate = 1;
621: $Apache::lonxml::import = 1;
622: }
623: }
624:
625: sub init_safespace {
626: my ($target,$safeeval,$safehole,$safeinit) = @_;
627: $safeeval->permit("entereval");
628: $safeeval->permit(":base_math");
629: $safeeval->permit("sort");
630: $safeeval->deny(":base_io");
631: $safehole->wrap(\&Apache::scripttag::xmlparse,$safeeval,'&xmlparse');
632: $safehole->wrap(\&Apache::lonnet::EXT,$safeeval,'&EXT');
633:
634: $safehole->wrap(\&Math::Cephes::asin,$safeeval,'&asin');
635: $safehole->wrap(\&Math::Cephes::acos,$safeeval,'&acos');
636: $safehole->wrap(\&Math::Cephes::atan,$safeeval,'&atan');
637: $safehole->wrap(\&Math::Cephes::sinh,$safeeval,'&sinh');
638: $safehole->wrap(\&Math::Cephes::cosh,$safeeval,'&cosh');
639: $safehole->wrap(\&Math::Cephes::tanh,$safeeval,'&tanh');
640: $safehole->wrap(\&Math::Cephes::asinh,$safeeval,'&asinh');
641: $safehole->wrap(\&Math::Cephes::acosh,$safeeval,'&acosh');
642: $safehole->wrap(\&Math::Cephes::atanh,$safeeval,'&atanh');
643: $safehole->wrap(\&Math::Cephes::erf,$safeeval,'&erf');
644: $safehole->wrap(\&Math::Cephes::erfc,$safeeval,'&erfc');
645: $safehole->wrap(\&Math::Cephes::j0,$safeeval,'&j0');
646: $safehole->wrap(\&Math::Cephes::j1,$safeeval,'&j1');
647: $safehole->wrap(\&Math::Cephes::jn,$safeeval,'&jn');
648: $safehole->wrap(\&Math::Cephes::jv,$safeeval,'&jv');
649: $safehole->wrap(\&Math::Cephes::y0,$safeeval,'&y0');
650: $safehole->wrap(\&Math::Cephes::y1,$safeeval,'&y1');
651: $safehole->wrap(\&Math::Cephes::yn,$safeeval,'&yn');
652: $safehole->wrap(\&Math::Cephes::yv,$safeeval,'&yv');
653: $safehole->wrap(\&Math::Random::random_beta,$safeeval,'&math_random_beta');
654: $safehole->wrap(\&Math::Random::random_chi_square,$safeeval,'&math_random_chi_square');
655: $safehole->wrap(\&Math::Random::random_exponential,$safeeval,'&math_random_exponential');
656: $safehole->wrap(\&Math::Random::random_f,$safeeval,'&math_random_f');
657: $safehole->wrap(\&Math::Random::random_gamma,$safeeval,'&math_random_gamma');
658: $safehole->wrap(\&Math::Random::random_multivariate_normal,$safeeval,'&math_random_multivariate_normal');
659: $safehole->wrap(\&Math::Random::random_multinomial,$safeeval,'&math_random_multinomial');
660: $safehole->wrap(\&Math::Random::random_noncentral_chi_square,$safeeval,'&math_random_noncentral_chi_square');
661: $safehole->wrap(\&Math::Random::random_noncentral_f,$safeeval,'&math_random_noncentral_f');
662: $safehole->wrap(\&Math::Random::random_normal,$safeeval,'&math_random_normal');
663: $safehole->wrap(\&Math::Random::random_permutation,$safeeval,'&math_random_permutation');
664: $safehole->wrap(\&Math::Random::random_permuted_index,$safeeval,'&math_random_permuted_index');
665: $safehole->wrap(\&Math::Random::random_uniform,$safeeval,'&math_random_uniform');
666: $safehole->wrap(\&Math::Random::random_poisson,$safeeval,'&math_random_poisson');
667: $safehole->wrap(\&Math::Random::random_uniform_integer,$safeeval,'&math_random_uniform_integer');
668: $safehole->wrap(\&Math::Random::random_negative_binomial,$safeeval,'&math_random_negative_binomial');
669: $safehole->wrap(\&Math::Random::random_binomial,$safeeval,'&math_random_binomial');
670: $safehole->wrap(\&Math::Random::random_seed_from_phrase,$safeeval,'&random_seed_from_phrase');
671: $safehole->wrap(\&Math::Random::random_set_seed_from_phrase,$safeeval,'&random_set_seed_from_phrase');
672: $safehole->wrap(\&Math::Random::random_get_seed,$safeeval,'&random_get_seed');
673: $safehole->wrap(\&Math::Random::random_set_seed,$safeeval,'&random_set_seed');
674:
675: #need to inspect this class of ops
676: # $safeeval->deny(":base_orig");
677: $safeinit .= ';$external::target="'.$target.'";';
678: $safeinit .= ';$external::randomseed='.&Apache::lonnet::rndseed().';';
679: &Apache::run::run($safeinit,$safeeval);
680: }
681:
682: sub startredirection {
683: $Apache::lonxml::redirection++;
684: push (@Apache::lonxml::outputstack, '');
685: }
686:
687: sub endredirection {
688: if (!$Apache::lonxml::redirection) {
689: &Apache::lonxml::error("Endredirection was called, before a startredirection, perhaps you have unbalanced tags. Some debuging information:".join ":",caller);
690: return '';
691: }
692: $Apache::lonxml::redirection--;
693: pop @Apache::lonxml::outputstack;
694: }
695:
696: sub end_tag {
697: my ($tagstack,$parstack,$token)=@_;
698: pop(@$tagstack);
699: pop(@$parstack);
700: &decreasedepth($token);
701: }
702:
703: sub initdepth {
704: @Apache::lonxml::depthcounter=();
705: $Apache::lonxml::depth=-1;
706: $Apache::lonxml::olddepth=-1;
707: }
708:
709: sub increasedepth {
710: my ($token) = @_;
711: $Apache::lonxml::depth++;
712: $Apache::lonxml::depthcounter[$Apache::lonxml::depth]++;
713: if ($Apache::lonxml::depthcounter[$Apache::lonxml::depth]==1) {
714: $Apache::lonxml::olddepth=$Apache::lonxml::depth;
715: }
716: my $curdepth=join('_',@Apache::lonxml::depthcounter);
717: &Apache::lonxml::debug("s $Apache::lonxml::depth : $Apache::lonxml::olddepth : $curdepth : $token->[1]\n");
718: #print "<br />s $Apache::lonxml::depth : $Apache::lonxml::olddepth : $curdepth : $token->[1]\n";
719: }
720:
721: sub decreasedepth {
722: my ($token) = @_;
723: $Apache::lonxml::depth--;
724: if ($Apache::lonxml::depth<$Apache::lonxml::olddepth-1) {
725: $#Apache::lonxml::depthcounter--;
726: $Apache::lonxml::olddepth=$Apache::lonxml::depth+1;
727: }
728: if ( $Apache::lonxml::depth < -1) {
729: &Apache::lonxml::warning("Unbalanced tags in resource");
730: $Apache::lonxml::depth='-1';
731: }
732: my $curdepth=join('_',@Apache::lonxml::depthcounter);
733: &Apache::lonxml::debug("e $Apache::lonxml::depth : $Apache::lonxml::olddepth : $token->[1] : $curdepth\n");
734: #print "<br />e $Apache::lonxml::depth : $Apache::lonxml::olddepth : $token->[1] : $curdepth\n";
735: }
736:
737: sub get_all_text {
738:
739: my($tag,$pars)= @_;
740: my $depth=0;
741: my $token;
742: my $result='';
743: if ( $tag =~ m:^/: ) {
744: my $tag=substr($tag,1);
745: # &Apache::lonxml::debug("have:$tag:");
746: while (($depth >=0) && ($token = $pars->get_token)) {
747: # &Apache::lonxml::debug("e token:$token->[0]:$depth:$token->[1]");
748: if (($token->[0] eq 'T')||($token->[0] eq 'C')||($token->[0] eq 'D')) {
749: $result.=$token->[1];
750: } elsif ($token->[0] eq 'PI') {
751: $result.=$token->[2];
752: } elsif ($token->[0] eq 'S') {
753: if ($token->[1] eq $tag) { $depth++; }
754: $result.=$token->[4];
755: } elsif ($token->[0] eq 'E') {
756: if ( $token->[1] eq $tag) { $depth--; }
757: #skip sending back the last end tag
758: if ($depth > -1) { $result.=$token->[2]; } else {
759: $pars->unget_token($token);
760: }
761: }
762: }
763: } else {
764: while ($token = $pars->get_token) {
765: # &Apache::lonxml::debug("s token:$token->[0]:$depth:$token->[1]");
766: if (($token->[0] eq 'T')||($token->[0] eq 'C')||($token->[0] eq 'D')) {
767: $result.=$token->[1];
768: } elsif ($token->[0] eq 'PI') {
769: $result.=$token->[2];
770: } elsif ($token->[0] eq 'S') {
771: if ( $token->[1] eq $tag) {
772: $pars->unget_token($token); last;
773: } else {
774: $result.=$token->[4];
775: }
776: } elsif ($token->[0] eq 'E') {
777: $result.=$token->[2];
778: }
779: }
780: }
781: # &Apache::lonxml::debug("Exit:$result:");
782: return $result
783: }
784:
785: sub newparser {
786: my ($parser,$contentref,$dir) = @_;
787: push (@$parser,HTML::TokeParser->new($contentref));
788: $$parser['-1']->xml_mode('1');
789: if ( $dir eq '' ) {
790: push (@Apache::lonxml::pwd, $Apache::lonxml::pwd[$#Apache::lonxml::pwd]);
791: } else {
792: push (@Apache::lonxml::pwd, $dir);
793: }
794: # &Apache::lonxml::debug("pwd:$#Apache::lonxml::pwd");
795: # &Apache::lonxml::debug("pwd:$Apache::lonxml::pwd[$#Apache::lonxml::pwd]");
796: }
797:
798: sub parstring {
799: my ($token) = @_;
800: my $temp='';
801: map {
802: unless ($_=~/\W/) {
803: my $val=$token->[2]->{$_};
804: $val =~ s/([\%\@\\])/\\$1/g;
805: #if ($val =~ m/^[\%\@]/) { $val="\\".$val; }
806: $temp .= "my \$$_=\"$val\";"
807: }
808: } @{$token->[3]};
809: return $temp;
810: }
811:
812: sub writeallows {
813: my $thisurl='/res/'.&Apache::lonnet::declutter(shift);
814: if ($ENV{'httpref.'.$thisurl}) {
815: $thisurl=$ENV{'httpref.'.$thisurl};
816: }
817: my $thisdir=$thisurl;
818: $thisdir=~s/\/[^\/]+$//;
819: my %httpref=();
820: map {
821: $httpref{'httpref.'.
822: &Apache::lonnet::hreflocation($thisdir,$_)}=$thisurl; } @extlinks;
823: &Apache::lonnet::appenv(%httpref);
824: }
825:
826: #
827: # Afterburner handles anchors, highlights and links
828: #
829: sub afterburn {
830: my $result=shift;
831: map {
832: my ($name, $value) = split(/=/,$_);
833: $value =~ tr/+/ /;
834: $value =~ s/%([a-fA-F0-9][a-fA-F0-9])/pack("C",hex($1))/eg;
835: if (($name eq 'highlight')||($name eq 'anchor')||($name eq 'link')) {
836: unless ($ENV{'form.'.$name}) {
837: $ENV{'form.'.$name}=$value;
838: }
839: }
840: } (split(/&/,$ENV{'QUERY_STRING'}));
841: if ($ENV{'form.highlight'}) {
842: map {
843: my $anchorname=$_;
844: my $matchthis=$anchorname;
845: $matchthis=~s/\_+/\\s\+/g;
846: $result=~s/($matchthis)/\<font color=\"red\"\>$1\<\/font\>/gs;
847: } split(/\,/,$ENV{'form.highlight'});
848: }
849: if ($ENV{'form.link'}) {
850: map {
851: my ($anchorname,$linkurl)=split(/\>/,$_);
852: my $matchthis=$anchorname;
853: $matchthis=~s/\_+/\\s\+/g;
854: $result=~s/($matchthis)/\<a href=\"$linkurl\"\>$1\<\/a\>/gs;
855: } split(/\,/,$ENV{'form.link'});
856: }
857: if ($ENV{'form.anchor'}) {
858: my $anchorname=$ENV{'form.anchor'};
859: my $matchthis=$anchorname;
860: $matchthis=~s/\_+/\\s\+/g;
861: $result=~s/($matchthis)/\<a name=\"$anchorname\"\>$1\<\/a\>/s;
862: $result.=(<<"ENDSCRIPT");
863: <script>
864: document.location.hash='$anchorname';
865: </script>
866: ENDSCRIPT
867: }
868: return $result;
869: }
870:
871: sub storefile {
872: my ($file,$contents)=@_;
873: if (my $fh=Apache::File->new('>'.$file)) {
874: print $fh $contents;
875: $fh->close();
876: }
877: }
878:
879: sub inserteditinfo {
880: my ($result,$filecontents)=@_;
881: unless ($filecontents) {
882: $filecontents=(<<SIMPLECONTENT);
883: <html>
884: <head>
885: <title>
886: Title of Document Goes Here
887: </title>
888: </head>
889: <body bgcolor="#FFFFFF">
890:
891: Body of Document Goes Here
892:
893: </body>
894: </html>
895: SIMPLECONTENT
896: }
897: my $editheader='<a href="#editsection">Edit below</a><hr />';
898: my $editfooter=(<<ENDFOOTER);
899: <hr />
900: <a name="editsection" />
901: <form method="post">
902: <textarea cols="80" rows="40" name="filecont">$filecontents</textarea>
903: <br />
904: <input type="submit" name="attemptclean"
905: value="Save and then attempt to clean HTML" />
906: <input type="submit" name="savethisfile" value="Save this" />
907: </form>
908: ENDFOOTER
909: $result=~s/(\<body[^\>]*\>)/$1$editheader/is;
910: $result=~s/(\<\/body\>)/$editfooter/is;
911: return $result;
912: }
913:
914: sub handler {
915: my $request=shift;
916:
917: my $target='web';
918:
919: $Apache::lonxml::debug=0;
920:
921: if ($ENV{'browser.mathml'}) {
922: $request->content_type('text/xml');
923: } else {
924: $request->content_type('text/html');
925: }
926:
927: $request->send_http_header;
928:
929: return OK if $request->header_only;
930:
931:
932: my $file=&Apache::lonnet::filelocation("",$request->uri);
933: #
934: # Edit action? Save file.
935: #
936: unless ($ENV{'request.state'} eq 'published') {
937: if (($ENV{'form.savethisfile'}) || ($ENV{'form.attemptclean'})) {
938: &storefile($file,$ENV{'form.filecont'});
939: }
940: }
941: my %mystyle;
942: my $result = '';
943: my $filecontents=&Apache::lonnet::getfile($file);
944: if ($filecontents == -1) {
945: $result=(<<ENDNOTFOUND);
946: <html>
947: <head>
948: <title>File not found</title>
949: </head>
950: <body bgcolor="#FFFFFF">
951: <b>File not found: $file</b>
952: </body>
953: </html>
954: ENDNOTFOUND
955: $filecontents='';
956: } else {
957: unless ($ENV{'request.state'} eq 'published') {
958: if ($ENV{'form.attemptclean'}) {
959: $filecontents=&htmlclean($filecontents,1);
960: }
961: }
962: $result = &Apache::lonxml::xmlparse($target,$filecontents,'',%mystyle);
963: }
964:
965: #
966: # Edit action? Insert editing commands
967: #
968: unless ($ENV{'request.state'} eq 'published') {
969: $result=&inserteditinfo($result,$filecontents);
970: }
971:
972: $request->print($result);
973:
974: writeallows($request->uri);
975: return OK;
976: }
977:
978: sub debug {
979: if ($Apache::lonxml::debug eq 1) {
980: print("DEBUG:".$_[0]."<br />\n");
981: }
982: }
983:
984: sub error {
985: if (($Apache::lonxml::debug eq 1) || ($ENV{'request.state'} eq 'construct') ) {
986: print "<b>ERROR:</b>".$_[0]."<br />\n";
987: } else {
988: print "<b>An Error occured while processing this resource. The instructor has been notified.</b> <br />";
989: #notify author
990: &Apache::lonmsg::author_res_msg($ENV{'request.filename'},$_[0]);
991: #notify course
992: if ( $ENV{'request.course.id'} ) {
993: my $users=$ENV{'course.'.$ENV{'request.course.id'}.'.comment.email'};
994: foreach my $user (split /\,/, $users) {
995: ($user,my $domain) = split /:/, $user;
996: &Apache::lonmsg::user_normal_msg($user,$domain,"Error in $ENV{'request.filename'}",$_[0]);
997: }
998: }
999:
1000: #FIXME probably shouldn't have me get everything forever.
1001: &Apache::lonmsg::user_normal_msg('albertel','msu',"Error in $ENV{'request.filename'}",$_[0]);
1002: #&Apache::lonmsg::user_normal_msg('albertel','103',"Error in $ENV{'request.filename'}",$_[0]);
1003: }
1004: }
1005:
1006: sub warning {
1007: if ($ENV{'request.state'} eq 'construct') {
1008: print "<b>W</b>ARNING<b>:</b>".$_[0]."<br />\n";
1009: }
1010: }
1011:
1012: sub get_param {
1013: my ($param,$parstack,$safeeval,$context) = @_;
1014: if ( ! $context ) { $context = -1; }
1015: my $args ='';
1016: if ( $#$parstack > (-2-$context) ) { $args=$$parstack[$context]; }
1017: return &Apache::run::run("{$args;".'return $'.$param.'}',$safeeval); #'
1018: }
1019:
1020: sub register_insert {
1021: my @data = split /\n/, &Apache::lonnet::getfile('/home/httpd/lonTabs/insertlist.tab');
1022: my $i;
1023: my $tagnum=0;
1024: my @order;
1025: for ($i=0;$i < $#data; $i++) {
1026: my $line = $data[$i];
1027: if ( $line =~ /^\#/ || $line =~ /^\s*\n/) { next; }
1028: if ( $line =~ /TABLE/ ) { last; }
1029: my ($tag,$descrip,$color,$function,$show) = split(/,/, $line);
1030: $insertlist{"$tagnum.tag"} = $tag;
1031: $insertlist{"$tagnum.description"} = $descrip;
1032: $insertlist{"$tagnum.color"} = $color;
1033: $insertlist{"$tagnum.function"} = $function;
1034: $insertlist{"$tagnum.show"}= $show;
1035: $insertlist{"$tag.num"}=$tagnum;
1036: $tagnum++;
1037: }
1038: $i++; #skipping TABLE line
1039: $tagnum = 0;
1040: for (;$i < $#data;$i++) {
1041: my $line = $data[$i];
1042: my ($mnemonic,@which) = split(/ +/,$line);
1043: my $tag = $insertlist{"$tagnum.tag"};
1044: for (my $j=0;$j <$#which;$j++) {
1045: if ( $which[$j] eq 'Y' ) {
1046: if ($insertlist{"$j.show"} ne 'no') {
1047: push(@{ $insertlist{"$tag.which"} },$j);
1048: }
1049: }
1050: }
1051: $tagnum++;
1052: }
1053: }
1054:
1055: sub description {
1056: my ($token)=@_;
1057: return $insertlist{$insertlist{"$token->[1].num"}.'.description'};
1058: }
1059: 1;
1060: __END__
1061:
1062:
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