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: @Apache::lonxml::pwd=();
238: my $pwd=$ENV{'request.filename'};
239: $pwd =~ s:/[^/]*$::;
240: &newparser(\@pars,\$content_file_string,$pwd);
241: my $currentstring = '';
242: my $finaloutput = '';
243: my $newarg = '';
244: my $result;
245:
246: my $safeeval = new Safe;
247: my $safehole = new Safe::Hole;
248: &init_safespace($target,$safeeval,$safehole,$safeinit);
249: #-------------------- Redefinition of the target in the case of compound target
250:
251: ($target, my @tenta) = split('&&',$target);
252:
253: my @stack = ();
254: my @parstack = ();
255: &initdepth;
256: my $token;
257: while ( $#pars > -1 ) {
258: while ($token = $pars[$#pars]->get_token) {
259: if (($token->[0] eq 'T') || ($token->[0] eq 'C') || ($token->[0] eq 'D') ) {
260: if ($metamode<1) { $result=$token->[1]; }
261: } elsif ($token->[0] eq 'PI') {
262: if ($metamode<1) { $result=$token->[2]; }
263: } elsif ($token->[0] eq 'S') {
264: # add tag to stack
265: push (@stack,$token->[1]);
266: # add parameters list to another stack
267: push (@parstack,&parstring($token));
268: &increasedepth($token);
269: if (exists $style_for_target{$token->[1]}) {
270: if ($Apache::lonxml::redirection) {
271: $Apache::lonxml::outputstack['-1'] .=
272: &recurse($style_for_target{$token->[1]},$target,$safeeval,
273: \%style_for_target,@parstack);
274: } else {
275: $finaloutput .= &recurse($style_for_target{$token->[1]},$target,
276: $safeeval,\%style_for_target,@parstack);
277: }
278: } else {
279: $result = &callsub("start_$token->[1]", $target, $token, \@stack,
280: \@parstack, \@pars, $safeeval, \%style_for_target);
281: }
282: } elsif ($token->[0] eq 'E') {
283: #clear out any tags that didn't end
284: while ($token->[1] ne $stack[$#stack] && ($#stack > -1)) {
285: &Apache::lonxml::warning("Unbalanced tags in resource $stack['-1']");
286: &end_tag(\@stack,\@parstack,$token);
287: }
288:
289: if (exists $style_for_target{'/'."$token->[1]"}) {
290: if ($Apache::lonxml::redirection) {
291: $Apache::lonxml::outputstack['-1'] .=
292: &recurse($style_for_target{'/'."$token->[1]"},
293: $target,$safeeval,\%style_for_target,@parstack);
294: } else {
295: $finaloutput .= &recurse($style_for_target{'/'."$token->[1]"},
296: $target,$safeeval,\%style_for_target,
297: @parstack);
298: }
299:
300: } else {
301: $result = &callsub("end_$token->[1]", $target, $token, \@stack,
302: \@parstack, \@pars,$safeeval, \%style_for_target);
303: }
304: } else {
305: &Apache::lonxml::error("Unknown token event :$token->[0]:$token->[1]:");
306: }
307: #evaluate variable refs in result
308: if ($result ne "") {
309: if ( $#parstack > -1 ) {
310: if ($Apache::lonxml::redirection) {
311: $Apache::lonxml::outputstack['-1'] .=
312: &Apache::run::evaluate($result,$safeeval,$parstack[$#parstack]);
313: } else {
314: $finaloutput .= &Apache::run::evaluate($result,$safeeval,
315: $parstack[$#parstack]);
316: }
317: } else {
318: $finaloutput .= &Apache::run::evaluate($result,$safeeval,'');
319: }
320: $result = '';
321: }
322: if ($token->[0] eq 'E') {
323: &end_tag(\@stack,\@parstack,$token);
324: }
325: }
326: pop @pars;
327: pop @Apache::lonxml::pwd;
328: }
329:
330: # if ($target eq 'meta') {
331: # $finaloutput.=&endredirection;
332: # }
333:
334: if (($ENV{'QUERY_STRING'}) && ($target eq 'web')) {
335: $finaloutput=&afterburn($finaloutput);
336: }
337:
338: return $finaloutput;
339: }
340:
341:
342: sub recurse {
343:
344: my @innerstack = ();
345: my @innerparstack = ();
346: my ($newarg,$target,$safeeval,$style_for_target,@parstack) = @_;
347: my @pat = ();
348: &newparser(\@pat,\$newarg);
349: my $tokenpat;
350: my $partstring = '';
351: my $output='';
352: my $decls='';
353: while ( $#pat > -1 ) {
354: while ($tokenpat = $pat[$#pat]->get_token) {
355: if (($tokenpat->[0] eq 'T') || ($tokenpat->[0] eq 'C') || ($tokenpat->[0] eq 'D') ) {
356: if ($metamode<1) { $partstring=$tokenpat->[1]; }
357: } elsif ($tokenpat->[0] eq 'PI') {
358: if ($metamode<1) { $partstring=$tokenpat->[2]; }
359: } elsif ($tokenpat->[0] eq 'S') {
360: push (@innerstack,$tokenpat->[1]);
361: push (@innerparstack,&parstring($tokenpat));
362: &increasedepth($tokenpat);
363: $partstring = &callsub("start_$tokenpat->[1]", $target, $tokenpat,
364: \@innerstack, \@innerparstack, \@pat,
365: $safeeval, $style_for_target);
366: } elsif ($tokenpat->[0] eq 'E') {
367: #clear out any tags that didn't end
368: while ($tokenpat->[1] ne $innerstack[$#innerstack]
369: && ($#innerstack > -1)) {
370: &Apache::lonxml::warning("Unbalanced tags in resource $innerstack['-1']");
371: &end_tag(\@innerstack,\@innerparstack,$tokenpat);
372: }
373: $partstring = &callsub("end_$tokenpat->[1]", $target, $tokenpat,
374: \@innerstack, \@innerparstack, \@pat,
375: $safeeval, $style_for_target);
376: } else {
377: &Apache::lonxml::error("Unknown token event :$tokenpat->[0]:$tokenpat->[1]:");
378: }
379: #pass both the variable to the style tag, and the tag we
380: #are processing inside the <definedtag>
381: if ( $partstring ne "" ) {
382: if ( $#parstack > -1 ) {
383: if ( $#innerparstack > -1 ) {
384: $decls= $parstack[$#parstack].$innerparstack[$#innerparstack];
385: } else {
386: $decls= $parstack[$#parstack];
387: }
388: } else {
389: if ( $#innerparstack > -1 ) {
390: $decls=$innerparstack[$#innerparstack];
391: } else {
392: $decls='';
393: }
394: }
395: $output .= &Apache::run::evaluate($partstring,$safeeval,$decls);
396: $partstring = '';
397: }
398: if ($tokenpat->[0] eq 'E') { pop @innerstack;pop @innerparstack;
399: &decreasedepth($tokenpat);}
400: }
401: pop @pat;
402: pop @Apache::lonxml::pwd;
403: }
404: return $output;
405: }
406:
407: sub callsub {
408: my ($sub,$target,$token,$tagstack,$parstack,$parser,$safeeval,$style)=@_;
409: my $currentstring='';
410: my $nodefault;
411: {
412: my $sub1;
413: no strict 'refs';
414: my $tag=$token->[1];
415: my $space=$Apache::lonxml::alltags{$tag};
416: if (!$space) {
417: $tag=~tr/A-Z/a-z/;
418: $sub=~tr/A-Z/a-z/;
419: $space=$Apache::lonxml::alltags{$tag}
420: }
421:
422: my $deleted=0;
423: $Apache::lonxml::curdepth=join('_',@Apache::lonxml::depthcounter);
424: if (($token->[0] eq 'S') && ($target eq 'modified')) {
425: $deleted=&Apache::edit::handle_delete($space,$target,$token,$tagstack,
426: $parstack,$parser,$safeeval,
427: $style);
428: }
429: if (!$deleted) {
430: if ($space) {
431: #&Apache::lonxml::debug("Calling sub $sub in $space $metamode<br />\n");
432: $sub1="$space\:\:$sub";
433: ($currentstring,$nodefault) = &$sub1($target,$token,$tagstack,
434: $parstack,$parser,$safeeval,
435: $style);
436: } else {
437: #&Apache::lonxml::debug("NOT Calling sub $sub in $space $metamode<br />\n");
438: if ($metamode <1) {
439: if (defined($token->[4]) && ($metamode < 1)) {
440: $currentstring = $token->[4];
441: } else {
442: $currentstring = $token->[2];
443: }
444: }
445: }
446: # &Apache::lonxml::debug("nodefalt:$nodefault:");
447: if ($currentstring eq '' && $nodefault eq '') {
448: if ($target eq 'edit') {
449: &Apache::lonxml::debug("doing default edit for $token->[1]");
450: if ($token->[0] eq 'S') {
451: $currentstring = &Apache::edit::tag_start($target,$token);
452: } elsif ($token->[0] eq 'E') {
453: $currentstring = &Apache::edit::tag_end($target,$token);
454: }
455: } elsif ($target eq 'modified') {
456: if ($token->[0] eq 'S') {
457: $currentstring = $token->[4];
458: $currentstring.=&Apache::edit::handle_insert();
459: } else {
460: $currentstring = $token->[2];
461: }
462: }
463: }
464: }
465: use strict 'refs';
466: }
467: return $currentstring;
468: }
469:
470: sub setup_globals {
471: my ($target)=@_;
472: $Apache::lonxml::registered = 0;
473: if ($target eq 'meta') {
474: $Apache::lonxml::redirection = 0;
475: $Apache::lonxml::metamode = 1;
476: $Apache::lonxml::evaluate = 1;
477: $Apache::lonxml::import = 0;
478: } elsif ($target eq 'grade') {
479: &startredirection;
480: $Apache::lonxml::metamode = 0;
481: $Apache::lonxml::evaluate = 1;
482: $Apache::lonxml::import = 1;
483: } elsif ($target eq 'modified') {
484: $Apache::lonxml::redirection = 0;
485: $Apache::lonxml::metamode = 0;
486: $Apache::lonxml::evaluate = 0;
487: $Apache::lonxml::import = 0;
488: } elsif ($target eq 'edit') {
489: $Apache::lonxml::redirection = 0;
490: $Apache::lonxml::metamode = 0;
491: $Apache::lonxml::evaluate = 0;
492: $Apache::lonxml::import = 0;
493: } else {
494: $Apache::lonxml::redirection = 0;
495: $Apache::lonxml::metamode = 0;
496: $Apache::lonxml::evaluate = 1;
497: $Apache::lonxml::import = 1;
498: }
499: }
500:
501: sub init_safespace {
502: my ($target,$safeeval,$safehole,$safeinit) = @_;
503: $safeeval->permit("entereval");
504: $safeeval->permit(":base_math");
505: $safeeval->permit("sort");
506: $safeeval->deny(":base_io");
507: $safehole->wrap(\&Apache::lonnet::EXT,$safeeval,'&EXT');
508:
509: $safehole->wrap(\&Math::Cephes::asin,$safeeval,'&asin');
510: $safehole->wrap(\&Math::Cephes::acos,$safeeval,'&acos');
511: $safehole->wrap(\&Math::Cephes::atan,$safeeval,'&atan');
512: $safehole->wrap(\&Math::Cephes::sinh,$safeeval,'&sinh');
513: $safehole->wrap(\&Math::Cephes::cosh,$safeeval,'&cosh');
514: $safehole->wrap(\&Math::Cephes::tanh,$safeeval,'&tanh');
515: $safehole->wrap(\&Math::Cephes::asinh,$safeeval,'&asinh');
516: $safehole->wrap(\&Math::Cephes::acosh,$safeeval,'&acosh');
517: $safehole->wrap(\&Math::Cephes::atanh,$safeeval,'&atanh');
518: $safehole->wrap(\&Math::Cephes::erf,$safeeval,'&erf');
519: $safehole->wrap(\&Math::Cephes::erfc,$safeeval,'&erfc');
520: $safehole->wrap(\&Math::Cephes::j0,$safeeval,'&j0');
521: $safehole->wrap(\&Math::Cephes::j1,$safeeval,'&j1');
522: $safehole->wrap(\&Math::Cephes::jn,$safeeval,'&jn');
523: $safehole->wrap(\&Math::Cephes::jv,$safeeval,'&jv');
524: $safehole->wrap(\&Math::Cephes::y0,$safeeval,'&y0');
525: $safehole->wrap(\&Math::Cephes::y1,$safeeval,'&y1');
526: $safehole->wrap(\&Math::Cephes::yn,$safeeval,'&yn');
527: $safehole->wrap(\&Math::Cephes::yv,$safeeval,'&yv');
528: $safehole->wrap(\&Math::Random::random_beta,$safeeval,'&math_random_beta');
529: $safehole->wrap(\&Math::Random::random_chi_square,$safeeval,'&math_random_chi_square');
530: $safehole->wrap(\&Math::Random::random_exponential,$safeeval,'&math_random_exponential');
531: $safehole->wrap(\&Math::Random::random_f,$safeeval,'&math_random_f');
532: $safehole->wrap(\&Math::Random::random_gamma,$safeeval,'&math_random_gamma');
533: $safehole->wrap(\&Math::Random::random_multivariate_normal,$safeeval,'&math_random_multivariate_normal');
534: $safehole->wrap(\&Math::Random::random_multinomial,$safeeval,'&math_random_multinomial');
535: $safehole->wrap(\&Math::Random::random_noncentral_chi_square,$safeeval,'&math_random_noncentral_chi_square');
536: $safehole->wrap(\&Math::Random::random_noncentral_f,$safeeval,'&math_random_noncentral_f');
537: $safehole->wrap(\&Math::Random::random_normal,$safeeval,'&math_random_normal');
538: $safehole->wrap(\&Math::Random::random_permutation,$safeeval,'&math_random_permutation');
539: $safehole->wrap(\&Math::Random::random_permuted_index,$safeeval,'&math_random_permuted_index');
540: $safehole->wrap(\&Math::Random::random_uniform,$safeeval,'&math_random_uniform');
541: $safehole->wrap(\&Math::Random::random_poisson,$safeeval,'&math_random_poisson');
542: $safehole->wrap(\&Math::Random::random_uniform_integer,$safeeval,'&math_random_uniform_integer');
543: $safehole->wrap(\&Math::Random::random_negative_binomial,$safeeval,'&math_random_negative_binomial');
544: $safehole->wrap(\&Math::Random::random_binomial,$safeeval,'&math_random_binomial');
545: $safehole->wrap(\&Math::Random::random_seed_from_phrase,$safeeval,'&random_seed_from_phrase');
546: $safehole->wrap(\&Math::Random::random_set_seed_from_phrase,$safeeval,'&random_set_seed_from_phrase');
547: $safehole->wrap(\&Math::Random::random_get_seed,$safeeval,'&random_get_seed');
548: $safehole->wrap(\&Math::Random::random_set_seed,$safeeval,'&random_set_seed');
549:
550: #need to inspect this class of ops
551: # $safeeval->deny(":base_orig");
552: $safeinit .= ';$external::target="'.$target.'";';
553: $safeinit .= ';$external::randomseed='.&Apache::lonnet::rndseed().';';
554: &Apache::run::run($safeinit,$safeeval);
555: }
556:
557: sub startredirection {
558: $Apache::lonxml::redirection++;
559: push (@Apache::lonxml::outputstack, '');
560: }
561:
562: sub endredirection {
563: if (!$Apache::lonxml::redirection) {
564: &Apache::lonxml::error("Endredirection was called, before a startredirection, perhaps you have unbalanced tags. Some debuging information:".join ":",caller);
565: return '';
566: }
567: $Apache::lonxml::redirection--;
568: pop @Apache::lonxml::outputstack;
569: }
570:
571: sub end_tag {
572: my ($tagstack,$parstack,$token)=@_;
573: pop(@$tagstack);
574: pop(@$parstack);
575: &decreasedepth($token);
576: }
577:
578: sub initdepth {
579: @Apache::lonxml::depthcounter=();
580: $Apache::lonxml::depth=-1;
581: $Apache::lonxml::olddepth=-1;
582: }
583:
584: sub increasedepth {
585: my ($token) = @_;
586: $Apache::lonxml::depth++;
587: $Apache::lonxml::depthcounter[$Apache::lonxml::depth]++;
588: if ($Apache::lonxml::depthcounter[$Apache::lonxml::depth]==1) {
589: $Apache::lonxml::olddepth=$Apache::lonxml::depth;
590: }
591: my $curdepth=join('_',@Apache::lonxml::depthcounter);
592: &Apache::lonxml::debug("s $Apache::lonxml::depth : $Apache::lonxml::olddepth : $curdepth : $token->[1]\n");
593: #print "<br />s $Apache::lonxml::depth : $Apache::lonxml::olddepth : $curdepth : $token->[1]\n";
594: }
595:
596: sub decreasedepth {
597: my ($token) = @_;
598: $Apache::lonxml::depth--;
599: if ($Apache::lonxml::depth<$Apache::lonxml::olddepth-1) {
600: $#Apache::lonxml::depthcounter--;
601: $Apache::lonxml::olddepth=$Apache::lonxml::depth+1;
602: }
603: if ( $Apache::lonxml::depth < -1) {
604: &Apache::lonxml::warning("Unbalanced tags in resource");
605: $Apache::lonxml::depth='-1';
606: }
607: my $curdepth=join('_',@Apache::lonxml::depthcounter);
608: &Apache::lonxml::debug("e $Apache::lonxml::depth : $Apache::lonxml::olddepth : $token->[1] : $curdepth\n");
609: #print "<br />e $Apache::lonxml::depth : $Apache::lonxml::olddepth : $token->[1] : $curdepth\n";
610: }
611:
612: sub get_all_text {
613:
614: my($tag,$pars)= @_;
615: my $depth=0;
616: my $token;
617: my $result='';
618: if ( $tag =~ m:^/: ) {
619: my $tag=substr($tag,1);
620: # &Apache::lonxml::debug("have:$tag:");
621: while (($depth >=0) && ($token = $pars->get_token)) {
622: # &Apache::lonxml::debug("e token:$token->[0]:$depth:$token->[1]");
623: if (($token->[0] eq 'T')||($token->[0] eq 'C')||($token->[0] eq 'D')) {
624: $result.=$token->[1];
625: } elsif ($token->[0] eq 'PI') {
626: $result.=$token->[2];
627: } elsif ($token->[0] eq 'S') {
628: if ($token->[1] eq $tag) { $depth++; }
629: $result.=$token->[4];
630: } elsif ($token->[0] eq 'E') {
631: if ( $token->[1] eq $tag) { $depth--; }
632: #skip sending back the last end tag
633: if ($depth > -1) { $result.=$token->[2]; } else {
634: $pars->unget_token($token);
635: }
636: }
637: }
638: } else {
639: while ($token = $pars->get_token) {
640: # &Apache::lonxml::debug("s token:$token->[0]:$depth:$token->[1]");
641: if (($token->[0] eq 'T')||($token->[0] eq 'C')||($token->[0] eq 'D')) {
642: $result.=$token->[1];
643: } elsif ($token->[0] eq 'PI') {
644: $result.=$token->[2];
645: } elsif ($token->[0] eq 'S') {
646: if ( $token->[1] eq $tag) {
647: $pars->unget_token($token); last;
648: } else {
649: $result.=$token->[4];
650: }
651: } elsif ($token->[0] eq 'E') {
652: $result.=$token->[2];
653: }
654: }
655: }
656: # &Apache::lonxml::debug("Exit:$result:");
657: return $result
658: }
659:
660: sub newparser {
661: my ($parser,$contentref,$dir) = @_;
662: push (@$parser,HTML::TokeParser->new($contentref));
663: $$parser['-1']->xml_mode('1');
664: if ( $dir eq '' ) {
665: push (@Apache::lonxml::pwd, $Apache::lonxml::pwd[$#Apache::lonxml::pwd]);
666: } else {
667: push (@Apache::lonxml::pwd, $dir);
668: }
669: # &Apache::lonxml::debug("pwd:$#Apache::lonxml::pwd");
670: # &Apache::lonxml::debug("pwd:$Apache::lonxml::pwd[$#Apache::lonxml::pwd]");
671: }
672:
673: sub parstring {
674: my ($token) = @_;
675: my $temp='';
676: map {
677: unless ($_=~/\W/) {
678: my $val=$token->[2]->{$_};
679: $val =~ s/([\%\@\\])/\\$1/g;
680: #if ($val =~ m/^[\%\@]/) { $val="\\".$val; }
681: $temp .= "my \$$_=\"$val\";"
682: }
683: } @{$token->[3]};
684: return $temp;
685: }
686:
687: sub writeallows {
688: my $thisurl='/res/'.&Apache::lonnet::declutter(shift);
689: my $thisdir=$thisurl;
690: $thisdir=~s/\/[^\/]+$//;
691: my %httpref=();
692: map {
693: $httpref{'httpref.'.
694: &Apache::lonnet::hreflocation($thisdir,$_)}=$thisurl; } @extlinks;
695: &Apache::lonnet::appenv(%httpref);
696: }
697:
698: #
699: # Afterburner handles anchors, highlights and links
700: #
701: sub afterburn {
702: my $result=shift;
703: map {
704: my ($name, $value) = split(/=/,$_);
705: $value =~ tr/+/ /;
706: $value =~ s/%([a-fA-F0-9][a-fA-F0-9])/pack("C",hex($1))/eg;
707: if (($name eq 'highlight')||($name eq 'anchor')||($name eq 'link')) {
708: unless ($ENV{'form.'.$name}) {
709: $ENV{'form.'.$name}=$value;
710: }
711: }
712: } (split(/&/,$ENV{'QUERY_STRING'}));
713: if ($ENV{'form.highlight'}) {
714: map {
715: my $anchorname=$_;
716: my $matchthis=$anchorname;
717: $matchthis=~s/\_+/\\s\+/g;
718: $result=~s/($matchthis)/\<font color=\"red\"\>$1\<\/font\>/gs;
719: } split(/\,/,$ENV{'form.highlight'});
720: }
721: if ($ENV{'form.link'}) {
722: map {
723: my ($anchorname,$linkurl)=split(/\>/,$_);
724: my $matchthis=$anchorname;
725: $matchthis=~s/\_+/\\s\+/g;
726: $result=~s/($matchthis)/\<a href=\"$linkurl\"\>$1\<\/a\>/gs;
727: } split(/\,/,$ENV{'form.link'});
728: }
729: if ($ENV{'form.anchor'}) {
730: my $anchorname=$ENV{'form.anchor'};
731: my $matchthis=$anchorname;
732: $matchthis=~s/\_+/\\s\+/g;
733: $result=~s/($matchthis)/\<a name=\"$anchorname\"\>$1\<\/a\>/s;
734: $result.=(<<"ENDSCRIPT");
735: <script>
736: document.location.hash='$anchorname';
737: </script>
738: ENDSCRIPT
739: }
740: return $result;
741: }
742:
743: sub storefile {
744: my ($file,$contents)=@_;
745: if (my $fh=Apache::File->new('>'.$file)) {
746: print $fh $contents;
747: $fh->close();
748: }
749: }
750:
751: sub inserteditinfo {
752: my ($result,$filecontents)=@_;
753: unless ($filecontents) {
754: $filecontents=(<<SIMPLECONTENT);
755: <html>
756: <head>
757: <title>
758: Title of Document Goes Here
759: </title>
760: </head>
761: <body bgcolor="#FFFFFF">
762:
763: Body of Document Goes Here
764:
765: </body>
766: </html>
767: SIMPLECONTENT
768: }
769: my $editheader='<a href="#editsection">Edit below</a><hr />';
770: my $editfooter=(<<ENDFOOTER);
771: <hr />
772: <a name="editsection" />
773: <form method="post">
774: <textarea cols="80" rows="40" name="filecont">$filecontents</textarea>
775: <br />
776: <input type="submit" name="savethisfile" value="Save this file" />
777: </form>
778: ENDFOOTER
779: $result=~s/(\<body[^\>]*\>)/$1$editheader/is;
780: $result=~s/(\<\/body\>)/$editfooter/is;
781: return $result;
782: }
783:
784: sub handler {
785: my $request=shift;
786:
787: my $target='web';
788:
789: $Apache::lonxml::debug=0;
790:
791: if ($ENV{'browser.mathml'}) {
792: $request->content_type('text/xml');
793: } else {
794: $request->content_type('text/html');
795: }
796:
797: $request->send_http_header;
798:
799: return OK if $request->header_only;
800:
801:
802: my $file=&Apache::lonnet::filelocation("",$request->uri);
803: #
804: # Edit action? Save file.
805: #
806: unless ($ENV{'request.state'} eq 'published') {
807: if ($ENV{'form.savethisfile'}) {
808: &storefile($file,$ENV{'form.filecont'});
809: }
810: }
811: my %mystyle;
812: my $result = '';
813: my $filecontents=&Apache::lonnet::getfile($file);
814: if ($filecontents == -1) {
815: $result=(<<ENDNOTFOUND);
816: <html>
817: <head>
818: <title>File not found</title>
819: </head>
820: <body bgcolor="#FFFFFF">
821: <b>File not found: $file</b>
822: </body>
823: </html>
824: ENDNOTFOUND
825: $filecontents='';
826: } else {
827: $result = &Apache::lonxml::xmlparse($target,$filecontents,'',%mystyle);
828: }
829:
830: #
831: # Edit action? Insert editing commands
832: #
833: unless ($ENV{'request.state'} eq 'published') {
834: $result=&inserteditinfo($result,$filecontents);
835: }
836:
837: $request->print($result);
838:
839: writeallows($request->uri);
840: return OK;
841: }
842:
843: sub debug {
844: if ($Apache::lonxml::debug eq 1) {
845: print("DEBUG:".$_[0]."<br />\n");
846: }
847: }
848:
849: sub error {
850: if (($Apache::lonxml::debug eq 1) || ($ENV{'request.state'} eq 'construct') ) {
851: print "<b>ERROR:</b>".$_[0]."<br />\n";
852: } else {
853: print "<b>An Error occured while processing this resource. The instructor has been notified.</b> <br />";
854: #notify author
855: &Apache::lonmsg::author_res_msg($ENV{'request.filename'},$_[0]);
856: #notify course
857: if ( $ENV{'request.course.id'} ) {
858: my $users=$ENV{'course.'.$ENV{'request.course.id'}.'.comment.email'};
859: foreach my $user (split /\,/, $users) {
860: ($user,my $domain) = split /:/, $user;
861: &Apache::lonmsg::user_normal_msg($user,$domain,"Error in $ENV{'request.filename'}",$_[0]);
862: }
863: }
864:
865: #FIXME probably shouldn't have me get everything forever.
866: &Apache::lonmsg::user_normal_msg('albertel','msu',"Error in $ENV{'request.filename'}",$_[0]);
867: #&Apache::lonmsg::user_normal_msg('albertel','103',"Error in $ENV{'request.filename'}",$_[0]);
868: }
869: }
870:
871: sub warning {
872: if ($ENV{'request.state'} eq 'construct') {
873: print "<b>W</b>ARNING<b>:</b>".$_[0]."<br />\n";
874: }
875: }
876:
877: sub get_param {
878: my ($param,$parstack,$safeeval,$context) = @_;
879: if ( ! $context ) { $context = -1; }
880: my $args ='';
881: if ( $#$parstack > (-2-$context) ) { $args=$$parstack[$context]; }
882: return &Apache::run::run("{$args;".'return $'.$param.'}',$safeeval); #'
883: }
884:
885: sub register_insert {
886: my @data = split /\n/, &Apache::lonnet::getfile('/home/httpd/lonTabs/insertlist.tab');
887: my $i;
888: my $tagnum=0;
889: my @order;
890: for ($i=0;$i < $#data; $i++) {
891: my $line = $data[$i];
892: if ( $line =~ /^\#/ || $line =~ /^\s*\n/) { next; }
893: if ( $line =~ /TABLE/ ) { last; }
894: my ($tag,$descrip,$color,$function,$show) = split(/,/, $line);
895: $insertlist{"$tagnum.tag"} = $tag;
896: $insertlist{"$tagnum.description"} = $descrip;
897: $insertlist{"$tagnum.color"} = $color;
898: $insertlist{"$tagnum.function"} = $function;
899: $insertlist{"$tagnum.show"}= $show;
900: $insertlist{"$tag.num"}=$tagnum;
901: $tagnum++;
902: }
903: $i++; #skipping TABLE line
904: $tagnum = 0;
905: for (;$i < $#data;$i++) {
906: my $line = $data[$i];
907: my ($mnemonic,@which) = split(/ +/,$line);
908: my $tag = $insertlist{"$tagnum.tag"};
909: for (my $j=0;$j <$#which;$j++) {
910: if ( $which[$j] eq 'Y' ) {
911: if ($insertlist{"$j.show"} ne 'no') {
912: push(@{ $insertlist{"$tag.which"} },$j);
913: }
914: }
915: }
916: $tagnum++;
917: }
918: }
919:
920: sub description {
921: my ($token)=@_;
922: return $insertlist{$insertlist{"$token->[1].num"}.'.description'};
923: }
924: 1;
925: __END__
926:
927:
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