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