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