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