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: # 8/7,8/9,8/10,8/11,8/15,8/16,8/17 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 $discussion.'</html>';
153: }
154:
155: sub maketoken {
156: my ($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:
166: my $token=&Apache::lonnet::checkout($symb,$tuname,$tudom,$tcrsid);
167:
168: unless ($token) { return ''; }
169:
170: my %reply=&Apache::lonnet::get('environment',
171: ['firstname','middlename','lastname','generation'],
172: $tudom,$tuname);
173: my $plainname=$reply{'firstname'}.' '.
174: $reply{'middlename'}.' '.
175: $reply{'lastname'}.' '.
176: $reply{'generation'};
177:
178: if ($target eq 'web') {
179: return
180: '<img align="right" src="/cgi-bin/barcode.gif?encode='.$token.'" />'.
181: 'Checked out for '.$plainname.
182: '<br />User: '.$tuname.' at '.$tudom.
183: '<br />CourseID: '.$tcrsid.
184: '<br />DocID: '.$token.
185: '<br />Time: '.localtime().'<hr />';
186: } else {
187: return $token;
188: }
189: }
190:
191: sub fontsettings() {
192: my $headerstring='';
193: if (($ENV{'browser.os'} eq 'mac') && (!$ENV{'browser.mathml'})) {
194: $headerstring.=
195: '<meta Content-Type="text/html; charset=x-mac-roman">';
196: }
197: return $headerstring;
198: }
199:
200: sub registerurl {
201: my $forcereg=shift;
202: if ($Apache::lonxml::registered) { return ''; }
203: $Apache::lonxml::registered=1;
204: if (($ENV{'REQUEST_URI'}!~/^\/(res\/)*adm\//) || ($forcereg)) {
205: my $hwkadd='';
206: if ($ENV{'REQUEST_URI'}=~/\.(problem|exam|quiz|assess|survey|form)$/) {
207: if (&Apache::lonnet::allowed('vgr',$ENV{'request.course.id'})) {
208: $hwkadd.=(<<ENDSUBM);
209: menu.switchbutton
210: (7,1,'subm.gif','view sub','missions',
211: 'gocmd("/adm/grades","submission")');
212: ENDSUBM
213: }
214: if (&Apache::lonnet::allowed('mgr',$ENV{'request.course.id'})) {
215: $hwkadd.=(<<ENDGRDS);
216: menu.switchbutton
217: (7,2,'pgrd.gif','problem','grades',
218: 'gocmd("/adm/grades","viewgrades")');
219: ENDGRDS
220: }
221: if (&Apache::lonnet::allowed('opa',$ENV{'request.course.id'})) {
222: $hwkadd.=(<<ENDPARM);
223: menu.switchbutton
224: (7,3,'pparm.gif','problem','parms',
225: 'gocmd("/adm/parmset","set")');
226: ENDPARM
227: }
228: }
229: return (<<ENDREGTHIS);
230:
231: <script language="JavaScript">
232: // BEGIN LON-CAPA Internal
233:
234: function LONCAPAreg() {
235: menu=window.open("","LONCAPAmenu");
236: menu.clearTimeout(menu.menucltim);
237: menu.currentURL=window.location.pathname;
238: menu.currentStale=0;
239: menu.clearbut(3,1);
240: menu.switchbutton
241: (6,3,'catalog.gif','catalog','info','catalog_info()');
242: menu.switchbutton
243: (8,1,'eval.gif','evaluate','this','gopost("/adm/evaluate",currentURL)');
244: menu.switchbutton
245: (8,2,'fdbk.gif','feedback','on this','gopost("/adm/feedback",currentURL)');
246: menu.switchbutton
247: (8,3,'prt.gif','prepare','printout','gopost("/adm/printout",currentURL)');
248: menu.switchbutton
249: (2,1,'back.gif','backward','','gopost("/adm/flip","back:"+currentURL)');
250: menu.switchbutton
251: (2,3,'forw.gif','forward','','gopost("/adm/flip","forward:"+currentURL)');
252: menu.switchbutton
253: (9,1,'sbkm.gif','set','bookmark','set_bookmark()');
254: menu.switchbutton
255: (9,2,'vbkm.gif','view','bookmark','edit_bookmarks()');
256: menu.switchbutton
257: (9,3,'anot.gif','anno-','tations','annotate()');
258: $hwkadd
259: }
260:
261: function LONCAPAstale() {
262: menu=window.open("","LONCAPAmenu");
263: menu.currentStale=1;
264: menu.switchbutton
265: (3,1,'reload.gif','return','location','go(currentURL)');
266: menu.clearbut(7,1);
267: menu.clearbut(7,2);
268: menu.clearbut(7,3);
269: menu.menucltim=menu.setTimeout(
270: 'clearbut(2,1);clearbut(2,3);clearbut(8,1);clearbut(8,2);clearbut(8,3);'+
271: 'clearbut(9,1);clearbut(9,2);clearbut(9,3);clearbut(6,3)',
272: 2000);
273:
274: }
275:
276: // END LON-CAPA Internal
277: </script>
278: ENDREGTHIS
279:
280: } else {
281: return (<<ENDDONOTREGTHIS);
282:
283: <script language="JavaScript">
284: // BEGIN LON-CAPA Internal
285:
286: function LONCAPAreg() {
287: menu=window.open("","LONCAPAmenu");
288: menu.currentStale=1;
289: menu.clearbut(2,1);
290: menu.clearbut(2,3);
291: menu.clearbut(8,1);
292: menu.clearbut(8,2);
293: menu.clearbut(8,3);
294: if (menu.currentURL) {
295: menu.switchbutton
296: (3,1,'reload.gif','return','location','go(currentURL)');
297: } else {
298: menu.clearbut(3,1);
299: }
300: }
301:
302: function LONCAPAstale() {
303: }
304:
305: // END LON-CAPA Internal
306: </script>
307: ENDDONOTREGTHIS
308:
309: }
310: }
311:
312: sub loadevents() {
313: return 'LONCAPAreg();';
314: }
315:
316: sub unloadevents() {
317: return 'LONCAPAstale();';
318: }
319:
320: sub printalltags {
321: my $temp;
322: foreach $temp (sort keys %Apache::lonxml::alltags) {
323: &Apache::lonxml::debug("$temp -- $Apache::lonxml::alltags{$temp}");
324: }
325: }
326:
327: sub xmlparse {
328: my ($target,$content_file_string,$safeinit,%style_for_target) = @_;
329:
330: &setup_globals($target);
331: #&printalltags();
332: my @pars = ();
333: my $pwd=$ENV{'request.filename'};
334: $pwd =~ s:/[^/]*$::;
335: &newparser(\@pars,\$content_file_string,$pwd);
336:
337: my $safeeval = new Safe;
338: my $safehole = new Safe::Hole;
339: &init_safespace($target,$safeeval,$safehole,$safeinit);
340: #-------------------- Redefinition of the target in the case of compound target
341:
342: ($target, my @tenta) = split('&&',$target);
343:
344: my @stack = ();
345: my @parstack = ();
346: &initdepth;
347:
348: my $finaloutput = &inner_xmlparse($target,\@stack,\@parstack,\@pars,
349: $safeeval,\%style_for_target);
350:
351: return $finaloutput;
352: }
353:
354: sub htmlclean {
355: my ($raw,$full)=@_;
356:
357: my $tree = HTML::TreeBuilder->new;
358: $tree->ignore_unknown(0);
359:
360: $tree->parse($raw);
361:
362: my $output= $tree->as_HTML(undef,' ');
363:
364: $output=~s/\<(br|hr|img|meta|allow)([^\>\/]*)\>/\<$1$2 \/\>/gis;
365: $output=~s/\<\/(br|hr|img|meta|allow)\>//gis;
366: unless ($full) {
367: $output=~s/\<[\/]*(body|head|html)\>//gis;
368: }
369:
370: $tree = $tree->delete;
371:
372: return $output;
373: }
374:
375: sub inner_xmlparse {
376: my ($target,$stack,$parstack,$pars,$safeeval,$style_for_target)=@_;
377: &Apache::lonxml::debug('Reentrant parser starting, again?');
378: my $finaloutput = '';
379: my $result;
380: my $token;
381: while ( $#$pars > -1 ) {
382: while ($token = $$pars['-1']->get_token) {
383: if (($token->[0] eq 'T') || ($token->[0] eq 'C') || ($token->[0] eq 'D') ) {
384: if ($metamode<1) {
385: $result=$token->[1];
386: }
387: } elsif ($token->[0] eq 'PI') {
388: if ($metamode<1) {
389: $result=$token->[2];
390: }
391: } elsif ($token->[0] eq 'S') {
392: # add tag to stack
393: push (@$stack,$token->[1]);
394: # add parameters list to another stack
395: push (@$parstack,&parstring($token));
396: &increasedepth($token);
397: if (exists $$style_for_target{$token->[1]}) {
398: if ($Apache::lonxml::redirection) {
399: $Apache::lonxml::outputstack['-1'] .=
400: &recurse($$style_for_target{$token->[1]},$target,$safeeval,
401: $style_for_target,@$parstack);
402: } else {
403: $finaloutput .= &recurse($$style_for_target{$token->[1]},$target,
404: $safeeval,$style_for_target,@$parstack);
405: }
406: } else {
407: $result = &callsub("start_$token->[1]", $target, $token, $stack,
408: $parstack, $pars, $safeeval, $style_for_target);
409: }
410: } elsif ($token->[0] eq 'E') {
411: #clear out any tags that didn't end
412: while ($token->[1] ne $$stack['-1'] && ($#$stack > -1)) {
413: &Apache::lonxml::warning("Unbalanced tags in resource $$stack['-1']");
414: &end_tag($stack,$parstack,$token);
415: }
416:
417: if (exists $$style_for_target{'/'."$token->[1]"}) {
418: if ($Apache::lonxml::redirection) {
419: $Apache::lonxml::outputstack['-1'] .=
420: &recurse($$style_for_target{'/'."$token->[1]"},
421: $target,$safeeval,$style_for_target,@$parstack);
422: } else {
423: $finaloutput .= &recurse($$style_for_target{'/'."$token->[1]"},
424: $target,$safeeval,$style_for_target,
425: @$parstack);
426: }
427:
428: } else {
429: $result = &callsub("end_$token->[1]", $target, $token, $stack,
430: $parstack, $pars,$safeeval, $style_for_target);
431: }
432: } else {
433: &Apache::lonxml::error("Unknown token event :$token->[0]:$token->[1]:");
434: }
435: #evaluate variable refs in result
436: if ($result ne "") {
437: if ( $#$parstack > -1 ) {
438: if ($Apache::lonxml::redirection) {
439: $Apache::lonxml::outputstack['-1'] .=
440: &Apache::run::evaluate($result,$safeeval,$$parstack['-1']);
441: } else {
442: $finaloutput .= &Apache::run::evaluate($result,$safeeval,
443: $$parstack['-1']);
444: }
445: } else {
446: $finaloutput .= &Apache::run::evaluate($result,$safeeval,'');
447: }
448: $result = '';
449: }
450: if ($token->[0] eq 'E') {
451: &end_tag($stack,$parstack,$token);
452: }
453: }
454: pop @$pars;
455: pop @Apache::lonxml::pwd;
456: }
457:
458: # if ($target eq 'meta') {
459: # $finaloutput.=&endredirection;
460: # }
461:
462: if (($ENV{'QUERY_STRING'}) && ($target eq 'web')) {
463: $finaloutput=&afterburn($finaloutput);
464: }
465: return $finaloutput;
466: }
467:
468: sub recurse {
469: my @innerstack = ();
470: my @innerparstack = ();
471: my ($newarg,$target,$safeeval,$style_for_target,@parstack) = @_;
472: my @pat = ();
473: &newparser(\@pat,\$newarg);
474: my $tokenpat;
475: my $partstring = '';
476: my $output='';
477: my $decls='';
478: while ( $#pat > -1 ) {
479: while ($tokenpat = $pat[$#pat]->get_token) {
480: if (($tokenpat->[0] eq 'T') || ($tokenpat->[0] eq 'C') || ($tokenpat->[0] eq 'D') ) {
481: if ($metamode<1) { $partstring=$tokenpat->[1]; }
482: } elsif ($tokenpat->[0] eq 'PI') {
483: if ($metamode<1) { $partstring=$tokenpat->[2]; }
484: } elsif ($tokenpat->[0] eq 'S') {
485: push (@innerstack,$tokenpat->[1]);
486: push (@innerparstack,&parstring($tokenpat));
487: &increasedepth($tokenpat);
488: $partstring = &callsub("start_$tokenpat->[1]", $target, $tokenpat,
489: \@innerstack, \@innerparstack, \@pat,
490: $safeeval, $style_for_target);
491: } elsif ($tokenpat->[0] eq 'E') {
492: #clear out any tags that didn't end
493: while ($tokenpat->[1] ne $innerstack[$#innerstack]
494: && ($#innerstack > -1)) {
495: &Apache::lonxml::warning("Unbalanced tags in resource $innerstack['-1']");
496: &end_tag(\@innerstack,\@innerparstack,$tokenpat);
497: }
498: $partstring = &callsub("end_$tokenpat->[1]", $target, $tokenpat,
499: \@innerstack, \@innerparstack, \@pat,
500: $safeeval, $style_for_target);
501: } else {
502: &Apache::lonxml::error("Unknown token event :$tokenpat->[0]:$tokenpat->[1]:");
503: }
504: #pass both the variable to the style tag, and the tag we
505: #are processing inside the <definedtag>
506: if ( $partstring ne "" ) {
507: if ( $#parstack > -1 ) {
508: if ( $#innerparstack > -1 ) {
509: $decls= $parstack[$#parstack].$innerparstack[$#innerparstack];
510: } else {
511: $decls= $parstack[$#parstack];
512: }
513: } else {
514: if ( $#innerparstack > -1 ) {
515: $decls=$innerparstack[$#innerparstack];
516: } else {
517: $decls='';
518: }
519: }
520: $output .= &Apache::run::evaluate($partstring,$safeeval,$decls);
521: $partstring = '';
522: }
523: if ($tokenpat->[0] eq 'E') { pop @innerstack;pop @innerparstack;
524: &decreasedepth($tokenpat);}
525: }
526: pop @pat;
527: pop @Apache::lonxml::pwd;
528: }
529: return $output;
530: }
531:
532: sub callsub {
533: my ($sub,$target,$token,$tagstack,$parstack,$parser,$safeeval,$style)=@_;
534: my $currentstring='';
535: my $nodefault;
536: {
537: my $sub1;
538: no strict 'refs';
539: my $tag=$token->[1];
540: my $space=$Apache::lonxml::alltags{$tag};
541: if (!$space) {
542: $tag=~tr/A-Z/a-z/;
543: $sub=~tr/A-Z/a-z/;
544: $space=$Apache::lonxml::alltags{$tag}
545: }
546:
547: my $deleted=0;
548: $Apache::lonxml::curdepth=join('_',@Apache::lonxml::depthcounter);
549: if (($token->[0] eq 'S') && ($target eq 'modified')) {
550: $deleted=&Apache::edit::handle_delete($space,$target,$token,$tagstack,
551: $parstack,$parser,$safeeval,
552: $style);
553: }
554: if (!$deleted) {
555: if ($space) {
556: #&Apache::lonxml::debug("Calling sub $sub in $space $metamode<br />\n");
557: $sub1="$space\:\:$sub";
558: ($currentstring,$nodefault) = &$sub1($target,$token,$tagstack,
559: $parstack,$parser,$safeeval,
560: $style);
561: } else {
562: #&Apache::lonxml::debug("NOT Calling sub $sub in $space $metamode<br />\n");
563: if ($metamode <1) {
564: if (defined($token->[4]) && ($metamode < 1)) {
565: $currentstring = $token->[4];
566: } else {
567: $currentstring = $token->[2];
568: }
569: }
570: }
571: # &Apache::lonxml::debug("nodefalt:$nodefault:");
572: if ($currentstring eq '' && $nodefault eq '') {
573: if ($target eq 'edit') {
574: &Apache::lonxml::debug("doing default edit for $token->[1]");
575: if ($token->[0] eq 'S') {
576: $currentstring = &Apache::edit::tag_start($target,$token);
577: } elsif ($token->[0] eq 'E') {
578: $currentstring = &Apache::edit::tag_end($target,$token);
579: }
580: } elsif ($target eq 'modified') {
581: if ($token->[0] eq 'S') {
582: $currentstring = $token->[4];
583: $currentstring.=&Apache::edit::handle_insert();
584: } else {
585: $currentstring = $token->[2];
586: }
587: }
588: }
589: }
590: use strict 'refs';
591: }
592: return $currentstring;
593: }
594:
595: sub setup_globals {
596: my ($target)=@_;
597: $Apache::lonxml::registered = 0;
598: @Apache::lonxml::pwd=();
599: if ($target eq 'meta') {
600: $Apache::lonxml::redirection = 0;
601: $Apache::lonxml::metamode = 1;
602: $Apache::lonxml::evaluate = 1;
603: $Apache::lonxml::import = 0;
604: } elsif ($target eq 'grade') {
605: &startredirection;
606: $Apache::lonxml::metamode = 0;
607: $Apache::lonxml::evaluate = 1;
608: $Apache::lonxml::import = 1;
609: } elsif ($target eq 'modified') {
610: $Apache::lonxml::redirection = 0;
611: $Apache::lonxml::metamode = 0;
612: $Apache::lonxml::evaluate = 0;
613: $Apache::lonxml::import = 0;
614: } elsif ($target eq 'edit') {
615: $Apache::lonxml::redirection = 0;
616: $Apache::lonxml::metamode = 0;
617: $Apache::lonxml::evaluate = 0;
618: $Apache::lonxml::import = 0;
619: } else {
620: $Apache::lonxml::redirection = 0;
621: $Apache::lonxml::metamode = 0;
622: $Apache::lonxml::evaluate = 1;
623: $Apache::lonxml::import = 1;
624: }
625: }
626:
627: sub init_safespace {
628: my ($target,$safeeval,$safehole,$safeinit) = @_;
629: $safeeval->permit("entereval");
630: $safeeval->permit(":base_math");
631: $safeeval->permit("sort");
632: $safeeval->deny(":base_io");
633: $safehole->wrap(\&Apache::scripttag::xmlparse,$safeeval,'&xmlparse');
634: $safehole->wrap(\&Apache::lonnet::EXT,$safeeval,'&EXT');
635:
636: $safehole->wrap(\&Math::Cephes::asin,$safeeval,'&asin');
637: $safehole->wrap(\&Math::Cephes::acos,$safeeval,'&acos');
638: $safehole->wrap(\&Math::Cephes::atan,$safeeval,'&atan');
639: $safehole->wrap(\&Math::Cephes::sinh,$safeeval,'&sinh');
640: $safehole->wrap(\&Math::Cephes::cosh,$safeeval,'&cosh');
641: $safehole->wrap(\&Math::Cephes::tanh,$safeeval,'&tanh');
642: $safehole->wrap(\&Math::Cephes::asinh,$safeeval,'&asinh');
643: $safehole->wrap(\&Math::Cephes::acosh,$safeeval,'&acosh');
644: $safehole->wrap(\&Math::Cephes::atanh,$safeeval,'&atanh');
645: $safehole->wrap(\&Math::Cephes::erf,$safeeval,'&erf');
646: $safehole->wrap(\&Math::Cephes::erfc,$safeeval,'&erfc');
647: $safehole->wrap(\&Math::Cephes::j0,$safeeval,'&j0');
648: $safehole->wrap(\&Math::Cephes::j1,$safeeval,'&j1');
649: $safehole->wrap(\&Math::Cephes::jn,$safeeval,'&jn');
650: $safehole->wrap(\&Math::Cephes::jv,$safeeval,'&jv');
651: $safehole->wrap(\&Math::Cephes::y0,$safeeval,'&y0');
652: $safehole->wrap(\&Math::Cephes::y1,$safeeval,'&y1');
653: $safehole->wrap(\&Math::Cephes::yn,$safeeval,'&yn');
654: $safehole->wrap(\&Math::Cephes::yv,$safeeval,'&yv');
655: $safehole->wrap(\&Math::Random::random_beta,$safeeval,'&math_random_beta');
656: $safehole->wrap(\&Math::Random::random_chi_square,$safeeval,'&math_random_chi_square');
657: $safehole->wrap(\&Math::Random::random_exponential,$safeeval,'&math_random_exponential');
658: $safehole->wrap(\&Math::Random::random_f,$safeeval,'&math_random_f');
659: $safehole->wrap(\&Math::Random::random_gamma,$safeeval,'&math_random_gamma');
660: $safehole->wrap(\&Math::Random::random_multivariate_normal,$safeeval,'&math_random_multivariate_normal');
661: $safehole->wrap(\&Math::Random::random_multinomial,$safeeval,'&math_random_multinomial');
662: $safehole->wrap(\&Math::Random::random_noncentral_chi_square,$safeeval,'&math_random_noncentral_chi_square');
663: $safehole->wrap(\&Math::Random::random_noncentral_f,$safeeval,'&math_random_noncentral_f');
664: $safehole->wrap(\&Math::Random::random_normal,$safeeval,'&math_random_normal');
665: $safehole->wrap(\&Math::Random::random_permutation,$safeeval,'&math_random_permutation');
666: $safehole->wrap(\&Math::Random::random_permuted_index,$safeeval,'&math_random_permuted_index');
667: $safehole->wrap(\&Math::Random::random_uniform,$safeeval,'&math_random_uniform');
668: $safehole->wrap(\&Math::Random::random_poisson,$safeeval,'&math_random_poisson');
669: $safehole->wrap(\&Math::Random::random_uniform_integer,$safeeval,'&math_random_uniform_integer');
670: $safehole->wrap(\&Math::Random::random_negative_binomial,$safeeval,'&math_random_negative_binomial');
671: $safehole->wrap(\&Math::Random::random_binomial,$safeeval,'&math_random_binomial');
672: $safehole->wrap(\&Math::Random::random_seed_from_phrase,$safeeval,'&random_seed_from_phrase');
673: $safehole->wrap(\&Math::Random::random_set_seed_from_phrase,$safeeval,'&random_set_seed_from_phrase');
674: $safehole->wrap(\&Math::Random::random_get_seed,$safeeval,'&random_get_seed');
675: $safehole->wrap(\&Math::Random::random_set_seed,$safeeval,'&random_set_seed');
676:
677: #need to inspect this class of ops
678: # $safeeval->deny(":base_orig");
679: $safeinit .= ';$external::target="'.$target.'";';
680: $safeinit .= ';$external::randomseed='.&Apache::lonnet::rndseed().';';
681: &Apache::run::run($safeinit,$safeeval);
682: }
683:
684: sub startredirection {
685: $Apache::lonxml::redirection++;
686: push (@Apache::lonxml::outputstack, '');
687: }
688:
689: sub endredirection {
690: if (!$Apache::lonxml::redirection) {
691: &Apache::lonxml::error("Endredirection was called, before a startredirection, perhaps you have unbalanced tags. Some debuging information:".join ":",caller);
692: return '';
693: }
694: $Apache::lonxml::redirection--;
695: pop @Apache::lonxml::outputstack;
696: }
697:
698: sub end_tag {
699: my ($tagstack,$parstack,$token)=@_;
700: pop(@$tagstack);
701: pop(@$parstack);
702: &decreasedepth($token);
703: }
704:
705: sub initdepth {
706: @Apache::lonxml::depthcounter=();
707: $Apache::lonxml::depth=-1;
708: $Apache::lonxml::olddepth=-1;
709: }
710:
711: sub increasedepth {
712: my ($token) = @_;
713: $Apache::lonxml::depth++;
714: $Apache::lonxml::depthcounter[$Apache::lonxml::depth]++;
715: if ($Apache::lonxml::depthcounter[$Apache::lonxml::depth]==1) {
716: $Apache::lonxml::olddepth=$Apache::lonxml::depth;
717: }
718: my $curdepth=join('_',@Apache::lonxml::depthcounter);
719: &Apache::lonxml::debug("s $Apache::lonxml::depth : $Apache::lonxml::olddepth : $curdepth : $token->[1]\n");
720: #print "<br />s $Apache::lonxml::depth : $Apache::lonxml::olddepth : $curdepth : $token->[1]\n";
721: }
722:
723: sub decreasedepth {
724: my ($token) = @_;
725: $Apache::lonxml::depth--;
726: if ($Apache::lonxml::depth<$Apache::lonxml::olddepth-1) {
727: $#Apache::lonxml::depthcounter--;
728: $Apache::lonxml::olddepth=$Apache::lonxml::depth+1;
729: }
730: if ( $Apache::lonxml::depth < -1) {
731: &Apache::lonxml::warning("Unbalanced tags in resource");
732: $Apache::lonxml::depth='-1';
733: }
734: my $curdepth=join('_',@Apache::lonxml::depthcounter);
735: &Apache::lonxml::debug("e $Apache::lonxml::depth : $Apache::lonxml::olddepth : $token->[1] : $curdepth\n");
736: #print "<br />e $Apache::lonxml::depth : $Apache::lonxml::olddepth : $token->[1] : $curdepth\n";
737: }
738:
739: sub get_all_text {
740:
741: my($tag,$pars)= @_;
742: my $depth=0;
743: my $token;
744: my $result='';
745: if ( $tag =~ m:^/: ) {
746: my $tag=substr($tag,1);
747: # &Apache::lonxml::debug("have:$tag:");
748: while (($depth >=0) && ($token = $pars->get_token)) {
749: # &Apache::lonxml::debug("e token:$token->[0]:$depth:$token->[1]");
750: if (($token->[0] eq 'T')||($token->[0] eq 'C')||($token->[0] eq 'D')) {
751: $result.=$token->[1];
752: } elsif ($token->[0] eq 'PI') {
753: $result.=$token->[2];
754: } elsif ($token->[0] eq 'S') {
755: if ($token->[1] eq $tag) { $depth++; }
756: $result.=$token->[4];
757: } elsif ($token->[0] eq 'E') {
758: if ( $token->[1] eq $tag) { $depth--; }
759: #skip sending back the last end tag
760: if ($depth > -1) { $result.=$token->[2]; } else {
761: $pars->unget_token($token);
762: }
763: }
764: }
765: } else {
766: while ($token = $pars->get_token) {
767: # &Apache::lonxml::debug("s token:$token->[0]:$depth:$token->[1]");
768: if (($token->[0] eq 'T')||($token->[0] eq 'C')||($token->[0] eq 'D')) {
769: $result.=$token->[1];
770: } elsif ($token->[0] eq 'PI') {
771: $result.=$token->[2];
772: } elsif ($token->[0] eq 'S') {
773: if ( $token->[1] eq $tag) {
774: $pars->unget_token($token); last;
775: } else {
776: $result.=$token->[4];
777: }
778: } elsif ($token->[0] eq 'E') {
779: $result.=$token->[2];
780: }
781: }
782: }
783: # &Apache::lonxml::debug("Exit:$result:");
784: return $result
785: }
786:
787: sub newparser {
788: my ($parser,$contentref,$dir) = @_;
789: push (@$parser,HTML::TokeParser->new($contentref));
790: $$parser['-1']->xml_mode('1');
791: if ( $dir eq '' ) {
792: push (@Apache::lonxml::pwd, $Apache::lonxml::pwd[$#Apache::lonxml::pwd]);
793: } else {
794: push (@Apache::lonxml::pwd, $dir);
795: }
796: # &Apache::lonxml::debug("pwd:$#Apache::lonxml::pwd");
797: # &Apache::lonxml::debug("pwd:$Apache::lonxml::pwd[$#Apache::lonxml::pwd]");
798: }
799:
800: sub parstring {
801: my ($token) = @_;
802: my $temp='';
803: map {
804: unless ($_=~/\W/) {
805: my $val=$token->[2]->{$_};
806: $val =~ s/([\%\@\\])/\\$1/g;
807: #if ($val =~ m/^[\%\@]/) { $val="\\".$val; }
808: $temp .= "my \$$_=\"$val\";"
809: }
810: } @{$token->[3]};
811: return $temp;
812: }
813:
814: sub writeallows {
815: my $thisurl='/res/'.&Apache::lonnet::declutter(shift);
816: if ($ENV{'httpref.'.$thisurl}) {
817: $thisurl=$ENV{'httpref.'.$thisurl};
818: }
819: my $thisdir=$thisurl;
820: $thisdir=~s/\/[^\/]+$//;
821: my %httpref=();
822: map {
823: $httpref{'httpref.'.
824: &Apache::lonnet::hreflocation($thisdir,$_)}=$thisurl; } @extlinks;
825: &Apache::lonnet::appenv(%httpref);
826: }
827:
828: #
829: # Afterburner handles anchors, highlights and links
830: #
831: sub afterburn {
832: my $result=shift;
833: map {
834: my ($name, $value) = split(/=/,$_);
835: $value =~ tr/+/ /;
836: $value =~ s/%([a-fA-F0-9][a-fA-F0-9])/pack("C",hex($1))/eg;
837: if (($name eq 'highlight')||($name eq 'anchor')||($name eq 'link')) {
838: unless ($ENV{'form.'.$name}) {
839: $ENV{'form.'.$name}=$value;
840: }
841: }
842: } (split(/&/,$ENV{'QUERY_STRING'}));
843: if ($ENV{'form.highlight'}) {
844: map {
845: my $anchorname=$_;
846: my $matchthis=$anchorname;
847: $matchthis=~s/\_+/\\s\+/g;
848: $result=~s/($matchthis)/\<font color=\"red\"\>$1\<\/font\>/gs;
849: } split(/\,/,$ENV{'form.highlight'});
850: }
851: if ($ENV{'form.link'}) {
852: map {
853: my ($anchorname,$linkurl)=split(/\>/,$_);
854: my $matchthis=$anchorname;
855: $matchthis=~s/\_+/\\s\+/g;
856: $result=~s/($matchthis)/\<a href=\"$linkurl\"\>$1\<\/a\>/gs;
857: } split(/\,/,$ENV{'form.link'});
858: }
859: if ($ENV{'form.anchor'}) {
860: my $anchorname=$ENV{'form.anchor'};
861: my $matchthis=$anchorname;
862: $matchthis=~s/\_+/\\s\+/g;
863: $result=~s/($matchthis)/\<a name=\"$anchorname\"\>$1\<\/a\>/s;
864: $result.=(<<"ENDSCRIPT");
865: <script>
866: document.location.hash='$anchorname';
867: </script>
868: ENDSCRIPT
869: }
870: return $result;
871: }
872:
873: sub storefile {
874: my ($file,$contents)=@_;
875: if (my $fh=Apache::File->new('>'.$file)) {
876: print $fh $contents;
877: $fh->close();
878: }
879: }
880:
881: sub inserteditinfo {
882: my ($result,$filecontents)=@_;
883: unless ($filecontents) {
884: $filecontents=(<<SIMPLECONTENT);
885: <html>
886: <head>
887: <title>
888: Title of Document Goes Here
889: </title>
890: </head>
891: <body bgcolor="#FFFFFF">
892:
893: Body of Document Goes Here
894:
895: </body>
896: </html>
897: SIMPLECONTENT
898: }
899: my $editheader='<a href="#editsection">Edit below</a><hr />';
900: my $editfooter=(<<ENDFOOTER);
901: <hr />
902: <a name="editsection" />
903: <form method="post">
904: <textarea cols="80" rows="40" name="filecont">$filecontents</textarea>
905: <br />
906: <input type="submit" name="attemptclean"
907: value="Save and then attempt to clean HTML" />
908: <input type="submit" name="savethisfile" value="Save this" />
909: </form>
910: ENDFOOTER
911: $result=~s/(\<body[^\>]*\>)/$1$editheader/is;
912: $result=~s/(\<\/body\>)/$editfooter/is;
913: return $result;
914: }
915:
916: sub handler {
917: my $request=shift;
918:
919: my $target='web';
920:
921: $Apache::lonxml::debug=0;
922:
923: if ($ENV{'browser.mathml'}) {
924: $request->content_type('text/xml');
925: } else {
926: $request->content_type('text/html');
927: }
928:
929: $request->send_http_header;
930:
931: return OK if $request->header_only;
932:
933:
934: my $file=&Apache::lonnet::filelocation("",$request->uri);
935: #
936: # Edit action? Save file.
937: #
938: unless ($ENV{'request.state'} eq 'published') {
939: if (($ENV{'form.savethisfile'}) || ($ENV{'form.attemptclean'})) {
940: &storefile($file,$ENV{'form.filecont'});
941: }
942: }
943: my %mystyle;
944: my $result = '';
945: my $filecontents=&Apache::lonnet::getfile($file);
946: if ($filecontents == -1) {
947: $result=(<<ENDNOTFOUND);
948: <html>
949: <head>
950: <title>File not found</title>
951: </head>
952: <body bgcolor="#FFFFFF">
953: <b>File not found: $file</b>
954: </body>
955: </html>
956: ENDNOTFOUND
957: $filecontents='';
958: } else {
959: unless ($ENV{'request.state'} eq 'published') {
960: if ($ENV{'form.attemptclean'}) {
961: $filecontents=&htmlclean($filecontents,1);
962: }
963: }
964: $result = &Apache::lonxml::xmlparse($target,$filecontents,'',%mystyle);
965: }
966:
967: #
968: # Edit action? Insert editing commands
969: #
970: unless ($ENV{'request.state'} eq 'published') {
971: $result=&inserteditinfo($result,$filecontents);
972: }
973:
974: $request->print($result);
975:
976: writeallows($request->uri);
977: return OK;
978: }
979:
980: sub debug {
981: if ($Apache::lonxml::debug eq 1) {
982: print("DEBUG:".$_[0]."<br />\n");
983: }
984: }
985:
986: sub error {
987: if (($Apache::lonxml::debug eq 1) || ($ENV{'request.state'} eq 'construct') ) {
988: print "<b>ERROR:</b>".$_[0]."<br />\n";
989: } else {
990: print "<b>An Error occured while processing this resource. The instructor has been notified.</b> <br />";
991: #notify author
992: &Apache::lonmsg::author_res_msg($ENV{'request.filename'},$_[0]);
993: #notify course
994: if ( $ENV{'request.course.id'} ) {
995: my $users=$ENV{'course.'.$ENV{'request.course.id'}.'.comment.email'};
996: foreach my $user (split /\,/, $users) {
997: ($user,my $domain) = split /:/, $user;
998: &Apache::lonmsg::user_normal_msg($user,$domain,"Error in $ENV{'request.filename'}",$_[0]);
999: }
1000: }
1001:
1002: #FIXME probably shouldn't have me get everything forever.
1003: &Apache::lonmsg::user_normal_msg('albertel','msu',"Error in $ENV{'request.filename'}",$_[0]);
1004: #&Apache::lonmsg::user_normal_msg('albertel','103',"Error in $ENV{'request.filename'}",$_[0]);
1005: }
1006: }
1007:
1008: sub warning {
1009: if ($ENV{'request.state'} eq 'construct') {
1010: print "<b>W</b>ARNING<b>:</b>".$_[0]."<br />\n";
1011: }
1012: }
1013:
1014: sub get_param {
1015: my ($param,$parstack,$safeeval,$context) = @_;
1016: if ( ! $context ) { $context = -1; }
1017: my $args ='';
1018: if ( $#$parstack > (-2-$context) ) { $args=$$parstack[$context]; }
1019: return &Apache::run::run("{$args;".'return $'.$param.'}',$safeeval); #'
1020: }
1021:
1022: sub register_insert {
1023: my @data = split /\n/, &Apache::lonnet::getfile('/home/httpd/lonTabs/insertlist.tab');
1024: my $i;
1025: my $tagnum=0;
1026: my @order;
1027: for ($i=0;$i < $#data; $i++) {
1028: my $line = $data[$i];
1029: if ( $line =~ /^\#/ || $line =~ /^\s*\n/) { next; }
1030: if ( $line =~ /TABLE/ ) { last; }
1031: my ($tag,$descrip,$color,$function,$show) = split(/,/, $line);
1032: $insertlist{"$tagnum.tag"} = $tag;
1033: $insertlist{"$tagnum.description"} = $descrip;
1034: $insertlist{"$tagnum.color"} = $color;
1035: $insertlist{"$tagnum.function"} = $function;
1036: $insertlist{"$tagnum.show"}= $show;
1037: $insertlist{"$tag.num"}=$tagnum;
1038: $tagnum++;
1039: }
1040: $i++; #skipping TABLE line
1041: $tagnum = 0;
1042: for (;$i < $#data;$i++) {
1043: my $line = $data[$i];
1044: my ($mnemonic,@which) = split(/ +/,$line);
1045: my $tag = $insertlist{"$tagnum.tag"};
1046: for (my $j=0;$j <$#which;$j++) {
1047: if ( $which[$j] eq 'Y' ) {
1048: if ($insertlist{"$j.show"} ne 'no') {
1049: push(@{ $insertlist{"$tag.which"} },$j);
1050: }
1051: }
1052: }
1053: $tagnum++;
1054: }
1055: }
1056:
1057: sub description {
1058: my ($token)=@_;
1059: return $insertlist{$insertlist{"$token->[1].num"}.'.description'};
1060: }
1061: 1;
1062: __END__
1063:
1064:
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