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