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