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: # 8/7,8/9,8/10,8/11,8/15,8/16,8/17,8/18 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 $discussion.'</html>';
153: }
154:
155: sub maketoken {
156: my ($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: return &Apache::lonnet::checkout($symb,$tuname,$tudom,$tcrsid);
167: }
168:
169: sub printtokenheader {
170: my ($target,$token,$symb,$tuname,$tudom,$tcrsid)=@_;
171: unless ($token) { return ''; }
172:
173: unless ($symb) {
174: $symb=&Apache::lonnet::symbread();
175: }
176: unless ($tuname) {
177: $tuname=$ENV{'user.name'};
178: $tudom=$ENV{'user.domain'};
179: $tcrsid=$ENV{'request.course.id'};
180: }
181:
182: my %reply=&Apache::lonnet::get('environment',
183: ['firstname','middlename','lastname','generation'],
184: $tudom,$tuname);
185: my $plainname=$reply{'firstname'}.' '.
186: $reply{'middlename'}.' '.
187: $reply{'lastname'}.' '.
188: $reply{'generation'};
189:
190: if ($target eq 'web') {
191: return
192: '<img align="right" src="/cgi-bin/barcode.gif?encode='.$token.'" />'.
193: 'Checked out for '.$plainname.
194: '<br />User: '.$tuname.' at '.$tudom.
195: '<br />CourseID: '.$tcrsid.
196: '<br />DocID: '.$token.
197: '<br />Time: '.localtime().'<hr />';
198: } else {
199: return $token;
200: }
201: }
202:
203: sub fontsettings() {
204: my $headerstring='';
205: if (($ENV{'browser.os'} eq 'mac') && (!$ENV{'browser.mathml'})) {
206: $headerstring.=
207: '<meta Content-Type="text/html; charset=x-mac-roman">';
208: }
209: return $headerstring;
210: }
211:
212: sub registerurl {
213: my $forcereg=shift;
214: if ($Apache::lonxml::registered) { return ''; }
215: $Apache::lonxml::registered=1;
216: if (($ENV{'REQUEST_URI'}!~/^\/(res\/)*adm\//) || ($forcereg)) {
217: my $hwkadd='';
218: if ($ENV{'REQUEST_URI'}=~/\.(problem|exam|quiz|assess|survey|form)$/) {
219: if (&Apache::lonnet::allowed('vgr',$ENV{'request.course.id'})) {
220: $hwkadd.=(<<ENDSUBM);
221: menu.switchbutton
222: (7,1,'subm.gif','view sub','missions',
223: 'gocmd("/adm/grades","submission")');
224: ENDSUBM
225: }
226: if (&Apache::lonnet::allowed('mgr',$ENV{'request.course.id'})) {
227: $hwkadd.=(<<ENDGRDS);
228: menu.switchbutton
229: (7,2,'pgrd.gif','problem','grades',
230: 'gocmd("/adm/grades","viewgrades")');
231: ENDGRDS
232: }
233: if (&Apache::lonnet::allowed('opa',$ENV{'request.course.id'})) {
234: $hwkadd.=(<<ENDPARM);
235: menu.switchbutton
236: (7,3,'pparm.gif','problem','parms',
237: 'gocmd("/adm/parmset","set")');
238: ENDPARM
239: }
240: }
241: return (<<ENDREGTHIS);
242:
243: <script language="JavaScript">
244: // BEGIN LON-CAPA Internal
245:
246: function LONCAPAreg() {
247: menu=window.open("","LONCAPAmenu");
248: menu.clearTimeout(menu.menucltim);
249: menu.currentURL=window.location.pathname;
250: menu.currentStale=0;
251: menu.clearbut(3,1);
252: menu.switchbutton
253: (6,3,'catalog.gif','catalog','info','catalog_info()');
254: menu.switchbutton
255: (8,1,'eval.gif','evaluate','this','gopost("/adm/evaluate",currentURL)');
256: menu.switchbutton
257: (8,2,'fdbk.gif','feedback','on this','gopost("/adm/feedback",currentURL)');
258: menu.switchbutton
259: (8,3,'prt.gif','prepare','printout','gopost("/adm/printout",currentURL)');
260: menu.switchbutton
261: (2,1,'back.gif','backward','','gopost("/adm/flip","back:"+currentURL)');
262: menu.switchbutton
263: (2,3,'forw.gif','forward','','gopost("/adm/flip","forward:"+currentURL)');
264: menu.switchbutton
265: (9,1,'sbkm.gif','set','bookmark','set_bookmark()');
266: menu.switchbutton
267: (9,2,'vbkm.gif','view','bookmark','edit_bookmarks()');
268: menu.switchbutton
269: (9,3,'anot.gif','anno-','tations','annotate()');
270: $hwkadd
271: }
272:
273: function LONCAPAstale() {
274: menu=window.open("","LONCAPAmenu");
275: menu.currentStale=1;
276: menu.switchbutton
277: (3,1,'reload.gif','return','location','go(currentURL)');
278: menu.clearbut(7,1);
279: menu.clearbut(7,2);
280: menu.clearbut(7,3);
281: menu.menucltim=menu.setTimeout(
282: 'clearbut(2,1);clearbut(2,3);clearbut(8,1);clearbut(8,2);clearbut(8,3);'+
283: 'clearbut(9,1);clearbut(9,2);clearbut(9,3);clearbut(6,3)',
284: 2000);
285:
286: }
287:
288: // END LON-CAPA Internal
289: </script>
290: ENDREGTHIS
291:
292: } else {
293: return (<<ENDDONOTREGTHIS);
294:
295: <script language="JavaScript">
296: // BEGIN LON-CAPA Internal
297:
298: function LONCAPAreg() {
299: menu=window.open("","LONCAPAmenu");
300: menu.currentStale=1;
301: menu.clearbut(2,1);
302: menu.clearbut(2,3);
303: menu.clearbut(8,1);
304: menu.clearbut(8,2);
305: menu.clearbut(8,3);
306: if (menu.currentURL) {
307: menu.switchbutton
308: (3,1,'reload.gif','return','location','go(currentURL)');
309: } else {
310: menu.clearbut(3,1);
311: }
312: }
313:
314: function LONCAPAstale() {
315: }
316:
317: // END LON-CAPA Internal
318: </script>
319: ENDDONOTREGTHIS
320:
321: }
322: }
323:
324: sub loadevents() {
325: return 'LONCAPAreg();';
326: }
327:
328: sub unloadevents() {
329: return 'LONCAPAstale();';
330: }
331:
332: sub printalltags {
333: my $temp;
334: foreach $temp (sort keys %Apache::lonxml::alltags) {
335: &Apache::lonxml::debug("$temp -- $Apache::lonxml::alltags{$temp}");
336: }
337: }
338:
339: sub xmlparse {
340: my ($target,$content_file_string,$safeinit,%style_for_target) = @_;
341:
342: &setup_globals($target);
343: #&printalltags();
344: my @pars = ();
345: my $pwd=$ENV{'request.filename'};
346: $pwd =~ s:/[^/]*$::;
347: &newparser(\@pars,\$content_file_string,$pwd);
348:
349: my $safeeval = new Safe;
350: my $safehole = new Safe::Hole;
351: &init_safespace($target,$safeeval,$safehole,$safeinit);
352: #-------------------- Redefinition of the target in the case of compound target
353:
354: ($target, my @tenta) = split('&&',$target);
355:
356: my @stack = ();
357: my @parstack = ();
358: &initdepth;
359:
360: my $finaloutput = &inner_xmlparse($target,\@stack,\@parstack,\@pars,
361: $safeeval,\%style_for_target);
362:
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 $output;
385: }
386:
387: sub inner_xmlparse {
388: my ($target,$stack,$parstack,$pars,$safeeval,$style_for_target)=@_;
389: &Apache::lonxml::debug('Reentrant parser starting, again?');
390: my $finaloutput = '';
391: my $result;
392: my $token;
393: while ( $#$pars > -1 ) {
394: while ($token = $$pars['-1']->get_token) {
395: if (($token->[0] eq 'T') || ($token->[0] eq 'C') || ($token->[0] eq 'D') ) {
396: if ($metamode<1) {
397: $result=$token->[1];
398: }
399: } elsif ($token->[0] eq 'PI') {
400: if ($metamode<1) {
401: $result=$token->[2];
402: }
403: } elsif ($token->[0] eq 'S') {
404: # add tag to stack
405: push (@$stack,$token->[1]);
406: # add parameters list to another stack
407: push (@$parstack,&parstring($token));
408: &increasedepth($token);
409: if (exists $$style_for_target{$token->[1]}) {
410: if ($Apache::lonxml::redirection) {
411: $Apache::lonxml::outputstack['-1'] .=
412: &recurse($$style_for_target{$token->[1]},$target,$safeeval,
413: $style_for_target,@$parstack);
414: } else {
415: $finaloutput .= &recurse($$style_for_target{$token->[1]},$target,
416: $safeeval,$style_for_target,@$parstack);
417: }
418: } else {
419: $result = &callsub("start_$token->[1]", $target, $token, $stack,
420: $parstack, $pars, $safeeval, $style_for_target);
421: }
422: } elsif ($token->[0] eq 'E') {
423: #clear out any tags that didn't end
424: while ($token->[1] ne $$stack['-1'] && ($#$stack > -1)) {
425: &Apache::lonxml::warning("Unbalanced tags in resource $$stack['-1']");
426: &end_tag($stack,$parstack,$token);
427: }
428:
429: if (exists $$style_for_target{'/'."$token->[1]"}) {
430: if ($Apache::lonxml::redirection) {
431: $Apache::lonxml::outputstack['-1'] .=
432: &recurse($$style_for_target{'/'."$token->[1]"},
433: $target,$safeeval,$style_for_target,@$parstack);
434: } else {
435: $finaloutput .= &recurse($$style_for_target{'/'."$token->[1]"},
436: $target,$safeeval,$style_for_target,
437: @$parstack);
438: }
439:
440: } else {
441: $result = &callsub("end_$token->[1]", $target, $token, $stack,
442: $parstack, $pars,$safeeval, $style_for_target);
443: }
444: } else {
445: &Apache::lonxml::error("Unknown token event :$token->[0]:$token->[1]:");
446: }
447: #evaluate variable refs in result
448: if ($result ne "") {
449: if ( $#$parstack > -1 ) {
450: if ($Apache::lonxml::redirection) {
451: $Apache::lonxml::outputstack['-1'] .=
452: &Apache::run::evaluate($result,$safeeval,$$parstack['-1']);
453: } else {
454: $finaloutput .= &Apache::run::evaluate($result,$safeeval,
455: $$parstack['-1']);
456: }
457: } else {
458: $finaloutput .= &Apache::run::evaluate($result,$safeeval,'');
459: }
460: $result = '';
461: }
462: if ($token->[0] eq 'E') {
463: &end_tag($stack,$parstack,$token);
464: }
465: }
466: pop @$pars;
467: pop @Apache::lonxml::pwd;
468: }
469:
470: # if ($target eq 'meta') {
471: # $finaloutput.=&endredirection;
472: # }
473:
474: if (($ENV{'QUERY_STRING'}) && ($target eq 'web')) {
475: $finaloutput=&afterburn($finaloutput);
476: }
477: return $finaloutput;
478: }
479:
480: sub recurse {
481: my @innerstack = ();
482: my @innerparstack = ();
483: my ($newarg,$target,$safeeval,$style_for_target,@parstack) = @_;
484: my @pat = ();
485: &newparser(\@pat,\$newarg);
486: my $tokenpat;
487: my $partstring = '';
488: my $output='';
489: my $decls='';
490: while ( $#pat > -1 ) {
491: while ($tokenpat = $pat[$#pat]->get_token) {
492: if (($tokenpat->[0] eq 'T') || ($tokenpat->[0] eq 'C') || ($tokenpat->[0] eq 'D') ) {
493: if ($metamode<1) { $partstring=$tokenpat->[1]; }
494: } elsif ($tokenpat->[0] eq 'PI') {
495: if ($metamode<1) { $partstring=$tokenpat->[2]; }
496: } elsif ($tokenpat->[0] eq 'S') {
497: push (@innerstack,$tokenpat->[1]);
498: push (@innerparstack,&parstring($tokenpat));
499: &increasedepth($tokenpat);
500: $partstring = &callsub("start_$tokenpat->[1]", $target, $tokenpat,
501: \@innerstack, \@innerparstack, \@pat,
502: $safeeval, $style_for_target);
503: } elsif ($tokenpat->[0] eq 'E') {
504: #clear out any tags that didn't end
505: while ($tokenpat->[1] ne $innerstack[$#innerstack]
506: && ($#innerstack > -1)) {
507: &Apache::lonxml::warning("Unbalanced tags in resource $innerstack['-1']");
508: &end_tag(\@innerstack,\@innerparstack,$tokenpat);
509: }
510: $partstring = &callsub("end_$tokenpat->[1]", $target, $tokenpat,
511: \@innerstack, \@innerparstack, \@pat,
512: $safeeval, $style_for_target);
513: } else {
514: &Apache::lonxml::error("Unknown token event :$tokenpat->[0]:$tokenpat->[1]:");
515: }
516: #pass both the variable to the style tag, and the tag we
517: #are processing inside the <definedtag>
518: if ( $partstring ne "" ) {
519: if ( $#parstack > -1 ) {
520: if ( $#innerparstack > -1 ) {
521: $decls= $parstack[$#parstack].$innerparstack[$#innerparstack];
522: } else {
523: $decls= $parstack[$#parstack];
524: }
525: } else {
526: if ( $#innerparstack > -1 ) {
527: $decls=$innerparstack[$#innerparstack];
528: } else {
529: $decls='';
530: }
531: }
532: $output .= &Apache::run::evaluate($partstring,$safeeval,$decls);
533: $partstring = '';
534: }
535: if ($tokenpat->[0] eq 'E') { pop @innerstack;pop @innerparstack;
536: &decreasedepth($tokenpat);}
537: }
538: pop @pat;
539: pop @Apache::lonxml::pwd;
540: }
541: return $output;
542: }
543:
544: sub callsub {
545: my ($sub,$target,$token,$tagstack,$parstack,$parser,$safeeval,$style)=@_;
546: my $currentstring='';
547: my $nodefault;
548: {
549: my $sub1;
550: no strict 'refs';
551: my $tag=$token->[1];
552: my $space=$Apache::lonxml::alltags{$tag};
553: if (!$space) {
554: $tag=~tr/A-Z/a-z/;
555: $sub=~tr/A-Z/a-z/;
556: $space=$Apache::lonxml::alltags{$tag}
557: }
558:
559: my $deleted=0;
560: $Apache::lonxml::curdepth=join('_',@Apache::lonxml::depthcounter);
561: if (($token->[0] eq 'S') && ($target eq 'modified')) {
562: $deleted=&Apache::edit::handle_delete($space,$target,$token,$tagstack,
563: $parstack,$parser,$safeeval,
564: $style);
565: }
566: if (!$deleted) {
567: if ($space) {
568: #&Apache::lonxml::debug("Calling sub $sub in $space $metamode<br />\n");
569: $sub1="$space\:\:$sub";
570: ($currentstring,$nodefault) = &$sub1($target,$token,$tagstack,
571: $parstack,$parser,$safeeval,
572: $style);
573: } else {
574: #&Apache::lonxml::debug("NOT Calling sub $sub in $space $metamode<br />\n");
575: if ($metamode <1) {
576: if (defined($token->[4]) && ($metamode < 1)) {
577: $currentstring = $token->[4];
578: } else {
579: $currentstring = $token->[2];
580: }
581: }
582: }
583: # &Apache::lonxml::debug("nodefalt:$nodefault:");
584: if ($currentstring eq '' && $nodefault eq '') {
585: if ($target eq 'edit') {
586: &Apache::lonxml::debug("doing default edit for $token->[1]");
587: if ($token->[0] eq 'S') {
588: $currentstring = &Apache::edit::tag_start($target,$token);
589: } elsif ($token->[0] eq 'E') {
590: $currentstring = &Apache::edit::tag_end($target,$token);
591: }
592: } elsif ($target eq 'modified') {
593: if ($token->[0] eq 'S') {
594: $currentstring = $token->[4];
595: $currentstring.=&Apache::edit::handle_insert();
596: } else {
597: $currentstring = $token->[2];
598: }
599: }
600: }
601: }
602: use strict 'refs';
603: }
604: return $currentstring;
605: }
606:
607: sub setup_globals {
608: my ($target)=@_;
609: $Apache::lonxml::registered = 0;
610: @Apache::lonxml::pwd=();
611: if ($target eq 'meta') {
612: $Apache::lonxml::redirection = 0;
613: $Apache::lonxml::metamode = 1;
614: $Apache::lonxml::evaluate = 1;
615: $Apache::lonxml::import = 0;
616: } elsif ($target eq 'grade') {
617: &startredirection;
618: $Apache::lonxml::metamode = 0;
619: $Apache::lonxml::evaluate = 1;
620: $Apache::lonxml::import = 1;
621: } elsif ($target eq 'modified') {
622: $Apache::lonxml::redirection = 0;
623: $Apache::lonxml::metamode = 0;
624: $Apache::lonxml::evaluate = 0;
625: $Apache::lonxml::import = 0;
626: } elsif ($target eq 'edit') {
627: $Apache::lonxml::redirection = 0;
628: $Apache::lonxml::metamode = 0;
629: $Apache::lonxml::evaluate = 0;
630: $Apache::lonxml::import = 0;
631: } else {
632: $Apache::lonxml::redirection = 0;
633: $Apache::lonxml::metamode = 0;
634: $Apache::lonxml::evaluate = 1;
635: $Apache::lonxml::import = 1;
636: }
637: }
638:
639: sub init_safespace {
640: my ($target,$safeeval,$safehole,$safeinit) = @_;
641: $safeeval->permit("entereval");
642: $safeeval->permit(":base_math");
643: $safeeval->permit("sort");
644: $safeeval->deny(":base_io");
645: $safehole->wrap(\&Apache::scripttag::xmlparse,$safeeval,'&xmlparse');
646: $safehole->wrap(\&Apache::lonnet::EXT,$safeeval,'&EXT');
647:
648: $safehole->wrap(\&Math::Cephes::asin,$safeeval,'&asin');
649: $safehole->wrap(\&Math::Cephes::acos,$safeeval,'&acos');
650: $safehole->wrap(\&Math::Cephes::atan,$safeeval,'&atan');
651: $safehole->wrap(\&Math::Cephes::sinh,$safeeval,'&sinh');
652: $safehole->wrap(\&Math::Cephes::cosh,$safeeval,'&cosh');
653: $safehole->wrap(\&Math::Cephes::tanh,$safeeval,'&tanh');
654: $safehole->wrap(\&Math::Cephes::asinh,$safeeval,'&asinh');
655: $safehole->wrap(\&Math::Cephes::acosh,$safeeval,'&acosh');
656: $safehole->wrap(\&Math::Cephes::atanh,$safeeval,'&atanh');
657: $safehole->wrap(\&Math::Cephes::erf,$safeeval,'&erf');
658: $safehole->wrap(\&Math::Cephes::erfc,$safeeval,'&erfc');
659: $safehole->wrap(\&Math::Cephes::j0,$safeeval,'&j0');
660: $safehole->wrap(\&Math::Cephes::j1,$safeeval,'&j1');
661: $safehole->wrap(\&Math::Cephes::jn,$safeeval,'&jn');
662: $safehole->wrap(\&Math::Cephes::jv,$safeeval,'&jv');
663: $safehole->wrap(\&Math::Cephes::y0,$safeeval,'&y0');
664: $safehole->wrap(\&Math::Cephes::y1,$safeeval,'&y1');
665: $safehole->wrap(\&Math::Cephes::yn,$safeeval,'&yn');
666: $safehole->wrap(\&Math::Cephes::yv,$safeeval,'&yv');
667: $safehole->wrap(\&Math::Random::random_beta,$safeeval,'&math_random_beta');
668: $safehole->wrap(\&Math::Random::random_chi_square,$safeeval,'&math_random_chi_square');
669: $safehole->wrap(\&Math::Random::random_exponential,$safeeval,'&math_random_exponential');
670: $safehole->wrap(\&Math::Random::random_f,$safeeval,'&math_random_f');
671: $safehole->wrap(\&Math::Random::random_gamma,$safeeval,'&math_random_gamma');
672: $safehole->wrap(\&Math::Random::random_multivariate_normal,$safeeval,'&math_random_multivariate_normal');
673: $safehole->wrap(\&Math::Random::random_multinomial,$safeeval,'&math_random_multinomial');
674: $safehole->wrap(\&Math::Random::random_noncentral_chi_square,$safeeval,'&math_random_noncentral_chi_square');
675: $safehole->wrap(\&Math::Random::random_noncentral_f,$safeeval,'&math_random_noncentral_f');
676: $safehole->wrap(\&Math::Random::random_normal,$safeeval,'&math_random_normal');
677: $safehole->wrap(\&Math::Random::random_permutation,$safeeval,'&math_random_permutation');
678: $safehole->wrap(\&Math::Random::random_permuted_index,$safeeval,'&math_random_permuted_index');
679: $safehole->wrap(\&Math::Random::random_uniform,$safeeval,'&math_random_uniform');
680: $safehole->wrap(\&Math::Random::random_poisson,$safeeval,'&math_random_poisson');
681: $safehole->wrap(\&Math::Random::random_uniform_integer,$safeeval,'&math_random_uniform_integer');
682: $safehole->wrap(\&Math::Random::random_negative_binomial,$safeeval,'&math_random_negative_binomial');
683: $safehole->wrap(\&Math::Random::random_binomial,$safeeval,'&math_random_binomial');
684: $safehole->wrap(\&Math::Random::random_seed_from_phrase,$safeeval,'&random_seed_from_phrase');
685: $safehole->wrap(\&Math::Random::random_set_seed_from_phrase,$safeeval,'&random_set_seed_from_phrase');
686: $safehole->wrap(\&Math::Random::random_get_seed,$safeeval,'&random_get_seed');
687: $safehole->wrap(\&Math::Random::random_set_seed,$safeeval,'&random_set_seed');
688:
689: #need to inspect this class of ops
690: # $safeeval->deny(":base_orig");
691: $safeinit .= ';$external::target="'.$target.'";';
692: $safeinit .= ';$external::randomseed='.&Apache::lonnet::rndseed().';';
693: &Apache::run::run($safeinit,$safeeval);
694: }
695:
696: sub startredirection {
697: $Apache::lonxml::redirection++;
698: push (@Apache::lonxml::outputstack, '');
699: }
700:
701: sub endredirection {
702: if (!$Apache::lonxml::redirection) {
703: &Apache::lonxml::error("Endredirection was called, before a startredirection, perhaps you have unbalanced tags. Some debuging information:".join ":",caller);
704: return '';
705: }
706: $Apache::lonxml::redirection--;
707: pop @Apache::lonxml::outputstack;
708: }
709:
710: sub end_tag {
711: my ($tagstack,$parstack,$token)=@_;
712: pop(@$tagstack);
713: pop(@$parstack);
714: &decreasedepth($token);
715: }
716:
717: sub initdepth {
718: @Apache::lonxml::depthcounter=();
719: $Apache::lonxml::depth=-1;
720: $Apache::lonxml::olddepth=-1;
721: }
722:
723: sub increasedepth {
724: my ($token) = @_;
725: $Apache::lonxml::depth++;
726: $Apache::lonxml::depthcounter[$Apache::lonxml::depth]++;
727: if ($Apache::lonxml::depthcounter[$Apache::lonxml::depth]==1) {
728: $Apache::lonxml::olddepth=$Apache::lonxml::depth;
729: }
730: my $curdepth=join('_',@Apache::lonxml::depthcounter);
731: &Apache::lonxml::debug("s $Apache::lonxml::depth : $Apache::lonxml::olddepth : $curdepth : $token->[1]\n");
732: #print "<br />s $Apache::lonxml::depth : $Apache::lonxml::olddepth : $curdepth : $token->[1]\n";
733: }
734:
735: sub decreasedepth {
736: my ($token) = @_;
737: $Apache::lonxml::depth--;
738: if ($Apache::lonxml::depth<$Apache::lonxml::olddepth-1) {
739: $#Apache::lonxml::depthcounter--;
740: $Apache::lonxml::olddepth=$Apache::lonxml::depth+1;
741: }
742: if ( $Apache::lonxml::depth < -1) {
743: &Apache::lonxml::warning("Unbalanced tags in resource");
744: $Apache::lonxml::depth='-1';
745: }
746: my $curdepth=join('_',@Apache::lonxml::depthcounter);
747: &Apache::lonxml::debug("e $Apache::lonxml::depth : $Apache::lonxml::olddepth : $token->[1] : $curdepth\n");
748: #print "<br />e $Apache::lonxml::depth : $Apache::lonxml::olddepth : $token->[1] : $curdepth\n";
749: }
750:
751: sub get_all_text {
752:
753: my($tag,$pars)= @_;
754: my $depth=0;
755: my $token;
756: my $result='';
757: if ( $tag =~ m:^/: ) {
758: my $tag=substr($tag,1);
759: # &Apache::lonxml::debug("have:$tag:");
760: while (($depth >=0) && ($token = $pars->get_token)) {
761: # &Apache::lonxml::debug("e token:$token->[0]:$depth:$token->[1]");
762: if (($token->[0] eq 'T')||($token->[0] eq 'C')||($token->[0] eq 'D')) {
763: $result.=$token->[1];
764: } elsif ($token->[0] eq 'PI') {
765: $result.=$token->[2];
766: } elsif ($token->[0] eq 'S') {
767: if ($token->[1] eq $tag) { $depth++; }
768: $result.=$token->[4];
769: } elsif ($token->[0] eq 'E') {
770: if ( $token->[1] eq $tag) { $depth--; }
771: #skip sending back the last end tag
772: if ($depth > -1) { $result.=$token->[2]; } else {
773: $pars->unget_token($token);
774: }
775: }
776: }
777: } else {
778: while ($token = $pars->get_token) {
779: # &Apache::lonxml::debug("s token:$token->[0]:$depth:$token->[1]");
780: if (($token->[0] eq 'T')||($token->[0] eq 'C')||($token->[0] eq 'D')) {
781: $result.=$token->[1];
782: } elsif ($token->[0] eq 'PI') {
783: $result.=$token->[2];
784: } elsif ($token->[0] eq 'S') {
785: if ( $token->[1] eq $tag) {
786: $pars->unget_token($token); last;
787: } else {
788: $result.=$token->[4];
789: }
790: } elsif ($token->[0] eq 'E') {
791: $result.=$token->[2];
792: }
793: }
794: }
795: # &Apache::lonxml::debug("Exit:$result:");
796: return $result
797: }
798:
799: sub newparser {
800: my ($parser,$contentref,$dir) = @_;
801: push (@$parser,HTML::TokeParser->new($contentref));
802: $$parser['-1']->xml_mode('1');
803: if ( $dir eq '' ) {
804: push (@Apache::lonxml::pwd, $Apache::lonxml::pwd[$#Apache::lonxml::pwd]);
805: } else {
806: push (@Apache::lonxml::pwd, $dir);
807: }
808: # &Apache::lonxml::debug("pwd:$#Apache::lonxml::pwd");
809: # &Apache::lonxml::debug("pwd:$Apache::lonxml::pwd[$#Apache::lonxml::pwd]");
810: }
811:
812: sub parstring {
813: my ($token) = @_;
814: my $temp='';
815: map {
816: unless ($_=~/\W/) {
817: my $val=$token->[2]->{$_};
818: $val =~ s/([\%\@\\])/\\$1/g;
819: #if ($val =~ m/^[\%\@]/) { $val="\\".$val; }
820: $temp .= "my \$$_=\"$val\";"
821: }
822: } @{$token->[3]};
823: return $temp;
824: }
825:
826: sub writeallows {
827: my $thisurl='/res/'.&Apache::lonnet::declutter(shift);
828: if ($ENV{'httpref.'.$thisurl}) {
829: $thisurl=$ENV{'httpref.'.$thisurl};
830: }
831: my $thisdir=$thisurl;
832: $thisdir=~s/\/[^\/]+$//;
833: my %httpref=();
834: map {
835: $httpref{'httpref.'.
836: &Apache::lonnet::hreflocation($thisdir,$_)}=$thisurl; } @extlinks;
837: &Apache::lonnet::appenv(%httpref);
838: }
839:
840: #
841: # Afterburner handles anchors, highlights and links
842: #
843: sub afterburn {
844: my $result=shift;
845: map {
846: my ($name, $value) = split(/=/,$_);
847: $value =~ tr/+/ /;
848: $value =~ s/%([a-fA-F0-9][a-fA-F0-9])/pack("C",hex($1))/eg;
849: if (($name eq 'highlight')||($name eq 'anchor')||($name eq 'link')) {
850: unless ($ENV{'form.'.$name}) {
851: $ENV{'form.'.$name}=$value;
852: }
853: }
854: } (split(/&/,$ENV{'QUERY_STRING'}));
855: if ($ENV{'form.highlight'}) {
856: map {
857: my $anchorname=$_;
858: my $matchthis=$anchorname;
859: $matchthis=~s/\_+/\\s\+/g;
860: $result=~s/($matchthis)/\<font color=\"red\"\>$1\<\/font\>/gs;
861: } split(/\,/,$ENV{'form.highlight'});
862: }
863: if ($ENV{'form.link'}) {
864: map {
865: my ($anchorname,$linkurl)=split(/\>/,$_);
866: my $matchthis=$anchorname;
867: $matchthis=~s/\_+/\\s\+/g;
868: $result=~s/($matchthis)/\<a href=\"$linkurl\"\>$1\<\/a\>/gs;
869: } split(/\,/,$ENV{'form.link'});
870: }
871: if ($ENV{'form.anchor'}) {
872: my $anchorname=$ENV{'form.anchor'};
873: my $matchthis=$anchorname;
874: $matchthis=~s/\_+/\\s\+/g;
875: $result=~s/($matchthis)/\<a name=\"$anchorname\"\>$1\<\/a\>/s;
876: $result.=(<<"ENDSCRIPT");
877: <script>
878: document.location.hash='$anchorname';
879: </script>
880: ENDSCRIPT
881: }
882: return $result;
883: }
884:
885: sub storefile {
886: my ($file,$contents)=@_;
887: if (my $fh=Apache::File->new('>'.$file)) {
888: print $fh $contents;
889: $fh->close();
890: }
891: }
892:
893: sub inserteditinfo {
894: my ($result,$filecontents)=@_;
895: unless ($filecontents) {
896: $filecontents=(<<SIMPLECONTENT);
897: <html>
898: <head>
899: <title>
900: Title of Document Goes Here
901: </title>
902: </head>
903: <body bgcolor="#FFFFFF">
904:
905: Body of Document Goes Here
906:
907: </body>
908: </html>
909: SIMPLECONTENT
910: }
911: my $editheader='<a href="#editsection">Edit below</a><hr />';
912: my $editfooter=(<<ENDFOOTER);
913: <hr />
914: <a name="editsection" />
915: <form method="post">
916: <textarea cols="80" rows="40" name="filecont">$filecontents</textarea>
917: <br />
918: <input type="submit" name="attemptclean"
919: value="Save and then attempt to clean HTML" />
920: <input type="submit" name="savethisfile" value="Save this" />
921: </form>
922: ENDFOOTER
923: $result=~s/(\<body[^\>]*\>)/$1$editheader/is;
924: $result=~s/(\<\/body\>)/$editfooter/is;
925: return $result;
926: }
927:
928: sub handler {
929: my $request=shift;
930:
931: my $target='web';
932:
933: $Apache::lonxml::debug=0;
934:
935: if ($ENV{'browser.mathml'}) {
936: $request->content_type('text/xml');
937: } else {
938: $request->content_type('text/html');
939: }
940:
941: $request->send_http_header;
942:
943: return OK if $request->header_only;
944:
945:
946: my $file=&Apache::lonnet::filelocation("",$request->uri);
947: #
948: # Edit action? Save file.
949: #
950: unless ($ENV{'request.state'} eq 'published') {
951: if (($ENV{'form.savethisfile'}) || ($ENV{'form.attemptclean'})) {
952: &storefile($file,$ENV{'form.filecont'});
953: }
954: }
955: my %mystyle;
956: my $result = '';
957: my $filecontents=&Apache::lonnet::getfile($file);
958: if ($filecontents == -1) {
959: $result=(<<ENDNOTFOUND);
960: <html>
961: <head>
962: <title>File not found</title>
963: </head>
964: <body bgcolor="#FFFFFF">
965: <b>File not found: $file</b>
966: </body>
967: </html>
968: ENDNOTFOUND
969: $filecontents='';
970: } else {
971: unless ($ENV{'request.state'} eq 'published') {
972: if ($ENV{'form.attemptclean'}) {
973: $filecontents=&htmlclean($filecontents,1);
974: }
975: }
976: $result = &Apache::lonxml::xmlparse($target,$filecontents,'',%mystyle);
977: }
978:
979: #
980: # Edit action? Insert editing commands
981: #
982: unless ($ENV{'request.state'} eq 'published') {
983: $result=&inserteditinfo($result,$filecontents);
984: }
985:
986: $request->print($result);
987:
988: writeallows($request->uri);
989: return OK;
990: }
991:
992: sub debug {
993: if ($Apache::lonxml::debug eq 1) {
994: print("DEBUG:".$_[0]."<br />\n");
995: }
996: }
997:
998: sub error {
999: if (($Apache::lonxml::debug eq 1) || ($ENV{'request.state'} eq 'construct') ) {
1000: print "<b>ERROR:</b>".$_[0]."<br />\n";
1001: } else {
1002: print "<b>An Error occured while processing this resource. The instructor has been notified.</b> <br />";
1003: #notify author
1004: &Apache::lonmsg::author_res_msg($ENV{'request.filename'},$_[0]);
1005: #notify course
1006: if ( $ENV{'request.course.id'} ) {
1007: my $users=$ENV{'course.'.$ENV{'request.course.id'}.'.comment.email'};
1008: foreach my $user (split /\,/, $users) {
1009: ($user,my $domain) = split /:/, $user;
1010: &Apache::lonmsg::user_normal_msg($user,$domain,"Error in $ENV{'request.filename'}",$_[0]);
1011: }
1012: }
1013:
1014: #FIXME probably shouldn't have me get everything forever.
1015: &Apache::lonmsg::user_normal_msg('albertel','msu',"Error in $ENV{'request.filename'}",$_[0]);
1016: #&Apache::lonmsg::user_normal_msg('albertel','103',"Error in $ENV{'request.filename'}",$_[0]);
1017: }
1018: }
1019:
1020: sub warning {
1021: if ($ENV{'request.state'} eq 'construct') {
1022: print "<b>W</b>ARNING<b>:</b>".$_[0]."<br />\n";
1023: }
1024: }
1025:
1026: sub get_param {
1027: my ($param,$parstack,$safeeval,$context) = @_;
1028: if ( ! $context ) { $context = -1; }
1029: my $args ='';
1030: if ( $#$parstack > (-2-$context) ) { $args=$$parstack[$context]; }
1031: return &Apache::run::run("{$args;".'return $'.$param.'}',$safeeval); #'
1032: }
1033:
1034: sub register_insert {
1035: my @data = split /\n/, &Apache::lonnet::getfile('/home/httpd/lonTabs/insertlist.tab');
1036: my $i;
1037: my $tagnum=0;
1038: my @order;
1039: for ($i=0;$i < $#data; $i++) {
1040: my $line = $data[$i];
1041: if ( $line =~ /^\#/ || $line =~ /^\s*\n/) { next; }
1042: if ( $line =~ /TABLE/ ) { last; }
1043: my ($tag,$descrip,$color,$function,$show) = split(/,/, $line);
1044: $insertlist{"$tagnum.tag"} = $tag;
1045: $insertlist{"$tagnum.description"} = $descrip;
1046: $insertlist{"$tagnum.color"} = $color;
1047: $insertlist{"$tagnum.function"} = $function;
1048: $insertlist{"$tagnum.show"}= $show;
1049: $insertlist{"$tag.num"}=$tagnum;
1050: $tagnum++;
1051: }
1052: $i++; #skipping TABLE line
1053: $tagnum = 0;
1054: for (;$i < $#data;$i++) {
1055: my $line = $data[$i];
1056: my ($mnemonic,@which) = split(/ +/,$line);
1057: my $tag = $insertlist{"$tagnum.tag"};
1058: for (my $j=0;$j <$#which;$j++) {
1059: if ( $which[$j] eq 'Y' ) {
1060: if ($insertlist{"$j.show"} ne 'no') {
1061: push(@{ $insertlist{"$tag.which"} },$j);
1062: }
1063: }
1064: }
1065: $tagnum++;
1066: }
1067: }
1068:
1069: sub description {
1070: my ($token)=@_;
1071: return $insertlist{$insertlist{"$token->[1].num"}.'.description'};
1072: }
1073: 1;
1074: __END__
1075:
1076:
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