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