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:
14: package Apache::lonxml;
15: use vars
16: qw(@pwd @outputstack $redirection $import @extlinks $metamode $evaluate %insertlist @namespace);
17: use strict;
18: use HTML::TokeParser;
19: use Safe;
20: use Safe::Hole;
21: use Math::Cephes qw(:trigs :hypers :bessels erf erfc);
22: use Math::Random qw(:all);
23: use Opcode;
24:
25: sub register {
26: my $space;
27: my @taglist;
28: my $temptag;
29: ($space,@taglist) = @_;
30: foreach $temptag (@taglist) {
31: $Apache::lonxml::alltags{$temptag}=$space;
32: }
33: }
34:
35: use Apache::Constants qw(:common);
36: use Apache::lontexconvert;
37: use Apache::style;
38: use Apache::run;
39: use Apache::londefdef;
40: use Apache::scripttag;
41: use Apache::edit;
42: use Apache::lonnet;
43: use Apache::File;
44:
45: #================================================== Main subroutine: xmlparse
46: #debugging control, to turn on debugging modify the correct handler
47: $Apache::lonxml::debug=0;
48:
49: #path to the directory containing the file currently being processed
50: @pwd=();
51:
52: #these two are used for capturing a subset of the output for later processing,
53: #don't touch them directly use &startredirection and &endredirection
54: @outputstack = ();
55: $redirection = 0;
56:
57: #controls wheter the <import> tag actually does
58: $import = 1;
59: @extlinks=();
60:
61: # meta mode is a bit weird only some output is to be turned off
62: #<output> tag turns metamode off (defined in londefdef.pm)
63: $metamode = 0;
64:
65: # turns on and of run::evaluate actually derefencing var refs
66: $evaluate = 1;
67:
68: # data structure for eidt mode, determines what tags can go into what other tags
69: %insertlist=();
70:
71: #stores the list of active tag namespaces
72: @namespace=();
73:
74: sub xmlbegin {
75: my $output='';
76: if ($ENV{'browser.mathml'}) {
77: $output='<?xml version="1.0"?>'
78: .'<?xml-stylesheet type="text/css" href="/adm/MathML/mathml.css"?>'
79: .'<!DOCTYPE html SYSTEM "/adm/MathML/mathml.dtd" '
80: .'[<!ENTITY mathns "http://www.w3.org/1998/Math/MathML">]>'
81: .'<html xmlns:math="http://www.w3.org/1998/Math/MathML" '
82: .'xmlns="http://www.w3.org/TR/REC-html40">';
83: } else {
84: $output='<html>';
85: }
86: return $output;
87: }
88:
89: sub xmlend {
90: return '</html>';
91: }
92:
93: sub fontsettings() {
94: my $headerstring='';
95: if (($ENV{'browser.os'} eq 'mac') && (!$ENV{'browser.mathml'})) {
96: $headerstring.=
97: '<meta Content-Type="text/html; charset=x-mac-roman">';
98: }
99: return $headerstring;
100: }
101:
102: sub registerurl {
103: if ($ENV{'REQUEST_URI'}!~/^\/(res\/)*adm\//) {
104: my $hwkadd='';
105: if ($ENV{'REQUEST_URI'}=~/\.(problem|exam|quiz|assess|survey|form)$/) {
106: if (&Apache::lonnet::allowed('vgr',$ENV{'request.course.id'})) {
107: $hwkadd.=(<<ENDSUBM);
108: menu.switchbutton
109: (7,1,'subm.gif','view sub','missions',
110: 'gocmd("/adm/grades","submission")');
111: ENDSUBM
112: }
113: if (&Apache::lonnet::allowed('mgr',$ENV{'request.course.id'})) {
114: $hwkadd.=(<<ENDGRDS);
115: menu.switchbutton
116: (7,2,'pgrd.gif','problem','grades',
117: 'gocmd("/adm/grades","viewgrades")');
118: ENDGRDS
119: }
120: if (&Apache::lonnet::allowed('opa',$ENV{'request.course.id'})) {
121: $hwkadd.=(<<ENDPARM);
122: menu.switchbutton
123: (7,3,'pparm.gif','problem','parms',
124: 'gocmd("/adm/parmset","set")');
125: ENDPARM
126: }
127: }
128: return (<<ENDREGTHIS);
129:
130: <script language="JavaScript">
131: // BEGIN LON-CAPA Internal
132:
133: function LONCAPAreg() {
134: menu=window.open("","LONCAPAmenu");
135: menu.clearTimeout(menu.menucltim);
136: menu.currentURL=window.location.pathname;
137: menu.currentStale=0;
138: menu.clearbut(3,1);
139: menu.switchbutton
140: (8,1,'eval.gif','evaluate','this','gopost("/adm/evaluate",currentURL)');
141: menu.switchbutton
142: (8,2,'fdbk.gif','feedback','on this','gopost("/adm/feedback",currentURL)');
143: menu.switchbutton
144: (8,3,'prt.gif','prepare','printout','gopost("/adm/printout",currentURL)');
145: menu.switchbutton
146: (2,1,'back.gif','backward','','gopost("/adm/flip","back:"+currentURL)');
147: menu.switchbutton
148: (2,3,'forw.gif','forward','','gopost("/adm/flip","forward:"+currentURL)');
149: $hwkadd
150: }
151:
152: function LONCAPAstale() {
153: menu=window.open("","LONCAPAmenu");
154: menu.currentStale=1;
155: menu.switchbutton
156: (3,1,'reload.gif','return','location','go(currentURL)');
157: menu.clearbut(7,1);
158: menu.clearbut(7,2);
159: menu.clearbut(7,3);
160: menu.menucltim=menu.setTimeout(
161: 'clearbut(2,1);clearbut(2,3);clearbut(8,1);clearbut(8,2);clearbut(8,3);',
162: 2000);
163:
164: }
165:
166: // END LON-CAPA Internal
167: </script>
168: ENDREGTHIS
169:
170: } else {
171: return (<<ENDDONOTREGTHIS);
172:
173: <script language="JavaScript">
174: // BEGIN LON-CAPA Internal
175:
176: function LONCAPAreg() {
177: menu=window.open("","LONCAPAmenu");
178: menu.currentStale=1;
179: menu.clearbut(2,1);
180: menu.clearbut(2,3);
181: menu.clearbut(8,1);
182: menu.clearbut(8,2);
183: menu.clearbut(8,3);
184: if (menu.currentURL) {
185: menu.switchbutton
186: (3,1,'reload.gif','return','location','go(currentURL)');
187: } else {
188: menu.clearbut(3,1);
189: }
190: }
191:
192: function LONCAPAstale() {
193: }
194:
195: // END LON-CAPA Internal
196: </script>
197: ENDDONOTREGTHIS
198:
199: }
200: }
201:
202: sub loadevents() {
203: return 'LONCAPAreg();';
204: }
205:
206: sub unloadevents() {
207: return 'LONCAPAstale();';
208: }
209:
210: sub printalltags {
211: my $temp;
212: foreach $temp (sort keys %Apache::lonxml::alltags) {
213: &Apache::lonxml::debug("$temp -- $Apache::lonxml::alltags{$temp}");
214: }
215: }
216:
217: sub xmlparse {
218: # $Apache::lonxml::debug=1;
219: my ($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 $sub1;
419: no strict 'refs';
420: if ($target eq 'edit' && $token->[0] eq 'S') {
421: $currentstring = &Apache::edit::tag_start($target,$token,$tagstack,
422: $parstack,$parser,
423: $safeeval,$style);
424: }
425: my $tag=$token->[1];
426: my $space=$Apache::lonxml::alltags{$tag};
427: if (!$space) {
428: $tag=~tr/A-Z/a-z/;
429: $sub=~tr/A-Z/a-z/;
430: $space=$Apache::lonxml::alltags{$tag}
431: }
432: if ($space) {
433: #&Apache::lonxml::debug("Calling sub $sub in $space $metamode<br />\n");
434: $sub1="$space\:\:$sub";
435: $Apache::lonxml::curdepth=join('_',@Apache::lonxml::depthcounter);
436: ($currentstring,$nodefault) = &$sub1($target,$token,$tagstack,
437: $parstack,$parser,$safeeval,
438: $style);
439: } else {
440: #&Apache::lonxml::debug("NOT Calling sub $sub in $space $metamode<br />\n");
441: if ($metamode <1) {
442: if (defined($token->[4]) && ($metamode < 1)) {
443: $currentstring = $token->[4];
444: } else {
445: $currentstring = $token->[2];
446: }
447: }
448: }
449: # &Apache::lonxml::debug("nodefalt:$nodefault:");
450: if ($currentstring eq '' && $nodefault eq '') {
451: if ($target eq 'edit') {
452: &Apache::lonxml::debug("doing default edit for $token->[1]");
453: if ($token->[0] eq 'S') {
454: $currentstring = &Apache::edit::tag_start($target,$token);
455: } elsif ($token->[0] eq 'E') {
456: $currentstring = &Apache::edit::tag_end($target,$token);
457: }
458: } elsif ($target eq 'modified') {
459: if ($token->[0] eq 'S') {
460: $currentstring = $token->[4];
461: $currentstring.=&Apache::edit::handle_insert();
462: } else {
463: $currentstring = $token->[2];
464: }
465: }
466: }
467: use strict 'refs';
468: }
469: return $currentstring;
470: }
471:
472: sub init_safespace {
473: my ($target,$safeeval,$safehole,$safeinit) = @_;
474: $safeeval->permit("entereval");
475: $safeeval->permit(":base_math");
476: $safeeval->permit("sort");
477: $safeeval->deny(":base_io");
478: $safehole->wrap(\&Apache::lonnet::EXT,$safeeval,'&EXT');
479:
480: $safehole->wrap(\&Math::Cephes::asin,$safeeval,'&asin');
481: $safehole->wrap(\&Math::Cephes::acos,$safeeval,'&acos');
482: $safehole->wrap(\&Math::Cephes::atan,$safeeval,'&atan');
483: $safehole->wrap(\&Math::Cephes::sinh,$safeeval,'&sinh');
484: $safehole->wrap(\&Math::Cephes::cosh,$safeeval,'&cosh');
485: $safehole->wrap(\&Math::Cephes::tanh,$safeeval,'&tanh');
486: $safehole->wrap(\&Math::Cephes::asinh,$safeeval,'&asinh');
487: $safehole->wrap(\&Math::Cephes::acosh,$safeeval,'&acosh');
488: $safehole->wrap(\&Math::Cephes::atanh,$safeeval,'&atanh');
489: $safehole->wrap(\&Math::Cephes::erf,$safeeval,'&erf');
490: $safehole->wrap(\&Math::Cephes::erfc,$safeeval,'&erfc');
491: $safehole->wrap(\&Math::Cephes::j0,$safeeval,'&j0');
492: $safehole->wrap(\&Math::Cephes::j1,$safeeval,'&j1');
493: $safehole->wrap(\&Math::Cephes::jn,$safeeval,'&jn');
494: $safehole->wrap(\&Math::Cephes::jv,$safeeval,'&jv');
495: $safehole->wrap(\&Math::Cephes::y0,$safeeval,'&y0');
496: $safehole->wrap(\&Math::Cephes::y1,$safeeval,'&y1');
497: $safehole->wrap(\&Math::Cephes::yn,$safeeval,'&yn');
498: $safehole->wrap(\&Math::Cephes::yv,$safeeval,'&yv');
499: $safehole->wrap(\&Math::Random::random_beta,$safeeval,'&math_random_beta');
500: $safehole->wrap(\&Math::Random::random_chi_square,$safeeval,'&math_random_chi_square');
501: $safehole->wrap(\&Math::Random::random_exponential,$safeeval,'&math_random_exponential');
502: $safehole->wrap(\&Math::Random::random_f,$safeeval,'&math_random_f');
503: $safehole->wrap(\&Math::Random::random_gamma,$safeeval,'&math_random_gamma');
504: $safehole->wrap(\&Math::Random::random_multivariate_normal,$safeeval,'&math_random_multivariate_normal');
505: $safehole->wrap(\&Math::Random::random_multinomial,$safeeval,'&math_random_multinomial');
506: $safehole->wrap(\&Math::Random::random_noncentral_chi_square,$safeeval,'&math_random_noncentral_chi_square');
507: $safehole->wrap(\&Math::Random::random_noncentral_f,$safeeval,'&math_random_noncentral_f');
508: $safehole->wrap(\&Math::Random::random_normal,$safeeval,'&math_random_normal');
509: $safehole->wrap(\&Math::Random::random_permutation,$safeeval,'&math_random_permutation');
510: # $safehole->wrap(\&Math::Random::random_permuted_index,$safeeval,'&math_random_permuted_index');
511: $safehole->wrap(\&Math::Random::random_uniform,$safeeval,'&math_random_uniform');
512: $safehole->wrap(\&Math::Random::random_poisson,$safeeval,'&math_random_poisson');
513: $safehole->wrap(\&Math::Random::random_uniform_integer,$safeeval,'&math_random_uniform_integer');
514: $safehole->wrap(\&Math::Random::random_negative_binomial,$safeeval,'&math_random_negative_binomial');
515: $safehole->wrap(\&Math::Random::random_binomial,$safeeval,'&math_random_binomial');
516: $safehole->wrap(\&Math::Random::random_seed_from_phrase,$safeeval,'&random_seed_from_phrase');
517: $safehole->wrap(\&Math::Random::random_set_seed_from_phrase,$safeeval,'&random_set_seed_from_phrase');
518: $safehole->wrap(\&Math::Random::random_get_seed,$safeeval,'&random_get_seed');
519: $safehole->wrap(\&Math::Random::random_set_seed,$safeeval,'&random_set_seed');
520:
521: #need to inspect this class of ops
522: # $safeeval->deny(":base_orig");
523: $safeinit .= ';$external::target="'.$target.'";';
524: $safeinit .= ';$external::randomseed='.&Apache::lonnet::rndseed().';';
525: &Apache::run::run($safeinit,$safeeval);
526: }
527:
528: sub startredirection {
529: $Apache::lonxml::redirection++;
530: push (@Apache::lonxml::outputstack, '');
531: }
532:
533: sub endredirection {
534: if (!$Apache::lonxml::redirection) {
535: &Apache::lonxml::error("Endredirection was called, before a startredirection, perhaps you have unbalanced tags. Some debuging information:".join ":",caller);
536: return '';
537: }
538: $Apache::lonxml::redirection--;
539: pop @Apache::lonxml::outputstack;
540: }
541:
542: sub initdepth {
543: @Apache::lonxml::depthcounter=();
544: $Apache::lonxml::depth=-1;
545: $Apache::lonxml::olddepth=-1;
546: }
547:
548: sub increasedepth {
549: my ($token) = @_;
550: $Apache::lonxml::depth++;
551: $Apache::lonxml::depthcounter[$Apache::lonxml::depth]++;
552: if ($Apache::lonxml::depthcounter[$Apache::lonxml::depth]==1) {
553: $Apache::lonxml::olddepth=$Apache::lonxml::depth;
554: }
555: my $curdepth=join('_',@Apache::lonxml::depthcounter);
556: &Apache::lonxml::debug("s $Apache::lonxml::depth : $Apache::lonxml::olddepth : $curdepth : $token->[1]\n");
557: #print "<br />s $Apache::lonxml::depth : $Apache::lonxml::olddepth : $curdepth : $token->[1]\n";
558: }
559:
560: sub decreasedepth {
561: my ($token) = @_;
562: $Apache::lonxml::depth--;
563: if ($Apache::lonxml::depth<$Apache::lonxml::olddepth-1) {
564: $#Apache::lonxml::depthcounter--;
565: $Apache::lonxml::olddepth=$Apache::lonxml::depth+1;
566: }
567: if ( $Apache::lonxml::depth < -1) {
568: &Apache::lonxml::warning("Unbalanced tags in resource");
569: $Apache::lonxml::depth='-1';
570: }
571: my $curdepth=join('_',@Apache::lonxml::depthcounter);
572: &Apache::lonxml::debug("e $Apache::lonxml::depth : $Apache::lonxml::olddepth : $token->[1] : $curdepth\n");
573: #print "<br />e $Apache::lonxml::depth : $Apache::lonxml::olddepth : $token->[1] : $curdepth\n";
574: }
575:
576: sub get_all_text {
577:
578: my($tag,$pars)= @_;
579: my $depth=0;
580: my $token;
581: my $result='';
582: if ( $tag =~ m:^/: ) {
583: my $tag=substr($tag,1);
584: # &Apache::lonxml::debug("have:$tag:");
585: while (($depth >=0) && ($token = $pars->get_token)) {
586: # &Apache::lonxml::debug("e token:$token->[0]:$depth:$token->[1]");
587: if (($token->[0] eq 'T')||($token->[0] eq 'C')||($token->[0] eq 'D')) {
588: $result.=$token->[1];
589: } elsif ($token->[0] eq 'PI') {
590: $result.=$token->[2];
591: } elsif ($token->[0] eq 'S') {
592: if ($token->[1] eq $tag) { $depth++; }
593: $result.=$token->[4];
594: } elsif ($token->[0] eq 'E') {
595: if ( $token->[1] eq $tag) { $depth--; }
596: #skip sending back the last end tag
597: if ($depth > -1) { $result.=$token->[2]; } else {
598: $pars->unget_token($token);
599: }
600: }
601: }
602: } else {
603: while ($token = $pars->get_token) {
604: # &Apache::lonxml::debug("s token:$token->[0]:$depth:$token->[1]");
605: if (($token->[0] eq 'T')||($token->[0] eq 'C')||($token->[0] eq 'D')) {
606: $result.=$token->[1];
607: } elsif ($token->[0] eq 'PI') {
608: $result.=$token->[2];
609: } elsif ($token->[0] eq 'S') {
610: if ( $token->[1] eq $tag) {
611: $pars->unget_token($token); last;
612: } else {
613: $result.=$token->[4];
614: }
615: } elsif ($token->[0] eq 'E') {
616: $result.=$token->[2];
617: }
618: }
619: }
620: # &Apache::lonxml::debug("Exit:$result:");
621: return $result
622: }
623:
624: sub newparser {
625: my ($parser,$contentref,$dir) = @_;
626: push (@$parser,HTML::TokeParser->new($contentref));
627: $$parser['-1']->xml_mode('1');
628: if ( $dir eq '' ) {
629: push (@Apache::lonxml::pwd, $Apache::lonxml::pwd[$#Apache::lonxml::pwd]);
630: } else {
631: push (@Apache::lonxml::pwd, $dir);
632: }
633: # &Apache::lonxml::debug("pwd:$#Apache::lonxml::pwd");
634: # &Apache::lonxml::debug("pwd:$Apache::lonxml::pwd[$#Apache::lonxml::pwd]");
635: }
636:
637: sub parstring {
638: my ($token) = @_;
639: my $temp='';
640: map {
641: unless ($_=~/\W/) {
642: my $val=$token->[2]->{$_};
643: $val =~ s/([\%\@\\])/\\$1/g;
644: #if ($val =~ m/^[\%\@]/) { $val="\\".$val; }
645: $temp .= "my \$$_=\"$val\";"
646: }
647: } @{$token->[3]};
648: return $temp;
649: }
650:
651: sub writeallows {
652: my $thisurl='/res/'.&Apache::lonnet::declutter(shift);
653: my $thisdir=$thisurl;
654: $thisdir=~s/\/[^\/]+$//;
655: my %httpref=();
656: map {
657: $httpref{'httpref.'.
658: &Apache::lonnet::hreflocation($thisdir,$_)}=$thisurl; } @extlinks;
659: &Apache::lonnet::appenv(%httpref);
660: }
661:
662: #
663: # Afterburner handles anchors, highlights and links
664: #
665: sub afterburn {
666: my $result=shift;
667: map {
668: my ($name, $value) = split(/=/,$_);
669: $value =~ tr/+/ /;
670: $value =~ s/%([a-fA-F0-9][a-fA-F0-9])/pack("C",hex($1))/eg;
671: if (($name eq 'highlight')||($name eq 'anchor')||($name eq 'link')) {
672: unless ($ENV{'form.'.$name}) {
673: $ENV{'form.'.$name}=$value;
674: }
675: }
676: } (split(/&/,$ENV{'QUERY_STRING'}));
677: if ($ENV{'form.highlight'}) {
678: map {
679: my $anchorname=$_;
680: my $matchthis=$anchorname;
681: $matchthis=~s/\_+/\\s\+/g;
682: $result=~s/($matchthis)/\<font color=\"red\"\>$1\<\/font\>/gs;
683: } split(/\,/,$ENV{'form.highlight'});
684: }
685: if ($ENV{'form.link'}) {
686: map {
687: my ($anchorname,$linkurl)=split(/\>/,$_);
688: my $matchthis=$anchorname;
689: $matchthis=~s/\_+/\\s\+/g;
690: $result=~s/($matchthis)/\<a href=\"$linkurl\"\>$1\<\/a\>/gs;
691: } split(/\,/,$ENV{'form.link'});
692: }
693: if ($ENV{'form.anchor'}) {
694: my $anchorname=$ENV{'form.anchor'};
695: my $matchthis=$anchorname;
696: $matchthis=~s/\_+/\\s\+/g;
697: $result=~s/($matchthis)/\<a name=\"$anchorname\"\>$1\<\/a\>/s;
698: $result.=(<<"ENDSCRIPT");
699: <script>
700: document.location.hash='$anchorname';
701: </script>
702: ENDSCRIPT
703: }
704: return $result;
705: }
706:
707: sub storefile {
708: my ($file,$contents)=@_;
709: if (my $fh=Apache::File->new('>'.$file)) {
710: print $fh $contents;
711: $fh->close();
712: }
713: }
714:
715: sub inserteditinfo {
716: my ($result,$filecontents)=@_;
717: unless ($filecontents) {
718: $filecontents=(<<SIMPLECONTENT);
719: <html>
720: <head>
721: <title>
722: Title of Document Goes Here
723: </title>
724: </head>
725: <body bgcolor="#FFFFFF">
726:
727: Body of Document Goes Here
728:
729: </body>
730: </html>
731: SIMPLECONTENT
732: }
733: my $editheader='<a href="#editsection">Edit below</a><hr />';
734: my $editfooter=(<<ENDFOOTER);
735: <hr />
736: <a name="editsection" />
737: <form method="post">
738: <textarea cols="80" rows="40" name="filecont">$filecontents</textarea>
739: <br />
740: <input type="submit" name="savethisfile" value="Save this file" />
741: </form>
742: ENDFOOTER
743: $result=~s/(\<body[^\>]*\>)/$1$editheader/is;
744: $result=~s/(\<\/body\>)/$editfooter/is;
745: return $result;
746: }
747:
748: sub handler {
749: my $request=shift;
750:
751: my $target='web';
752:
753: $Apache::lonxml::debug=0;
754:
755: if ($ENV{'browser.mathml'}) {
756: $request->content_type('text/xml');
757: } else {
758: $request->content_type('text/html');
759: }
760:
761: $request->send_http_header;
762:
763: return OK if $request->header_only;
764:
765:
766: my $file=&Apache::lonnet::filelocation("",$request->uri);
767: #
768: # Edit action? Save file.
769: #
770: unless ($ENV{'request.state'} eq 'published') {
771: if ($ENV{'form.savethisfile'}) {
772: &storefile($file,$ENV{'form.filecont'});
773: }
774: }
775: my %mystyle;
776: my $result = '';
777: my $filecontents=&Apache::lonnet::getfile($file);
778: if ($filecontents == -1) {
779: $result=(<<ENDNOTFOUND);
780: <html>
781: <head>
782: <title>File not found</title>
783: </head>
784: <body bgcolor="#FFFFFF">
785: <b>File not found: $file</b>
786: </body>
787: </html>
788: ENDNOTFOUND
789: $filecontents='';
790: } else {
791: $result = &Apache::lonxml::xmlparse($target,$filecontents,'',%mystyle);
792: }
793:
794: #
795: # Edit action? Insert editing commands
796: #
797: unless ($ENV{'request.state'} eq 'published') {
798: $result=&inserteditinfo($result,$filecontents);
799: }
800:
801: $request->print($result);
802:
803: writeallows($request->uri);
804: return OK;
805: }
806:
807: sub debug {
808: if ($Apache::lonxml::debug eq 1) {
809: print "DEBUG:".$_[0]."<br />\n";
810: }
811: }
812:
813: sub error {
814: if (($Apache::lonxml::debug eq 1) || ($ENV{'request.state'} eq 'construct') ) {
815: print "<b>ERROR:</b>".$_[0]."<br />\n";
816: } else {
817: print "<b>An Error occured while processing this resource. The instructor has been notified.</b> <br />";
818: #notify author
819: &Apache::lonmsg::author_res_msg($ENV{'request.filename'},$_[0]);
820: #notify course
821: if ( $ENV{'request.course.id'} ) {
822: my $users=$ENV{'course.'.$ENV{'request.course.id'}.'.comment.email'};
823: foreach my $user (split /\,/, $users) {
824: ($user,my $domain) = split /:/, $user;
825: &Apache::lonmsg::user_normal_msg($user,$domain,"Error in $ENV{'request.filename'}",$_[0]);
826: }
827: }
828:
829: #FIXME probably shouldn't have me get everything forever.
830: &Apache::lonmsg::user_normal_msg('albertel','msu',"Error in $ENV{'request.filename'}",$_[0]);
831: #&Apache::lonmsg::user_normal_msg('albertel','103',"Error in $ENV{'request.filename'}",$_[0]);
832: }
833: }
834:
835: sub warning {
836: if ($ENV{'request.state'} eq 'construct') {
837: print "<b>W</b>ARNING<b>:</b>".$_[0]."<br />\n";
838: }
839: }
840:
841: sub get_param {
842: my ($param,$parstack,$safeeval,$context) = @_;
843: if ( ! $context ) { $context = -1; }
844: my $args ='';
845: if ( $#$parstack > (-2-$context) ) { $args=$$parstack[$context]; }
846: return &Apache::run::run("{$args;".'return $'.$param.'}',$safeeval); #'
847: }
848:
849: sub register_insert {
850: my @data = split /\n/, &Apache::lonnet::getfile('/home/httpd/lonTabs/insertlist.tab');
851: my $i;
852: my $tagnum=0;
853: my @order;
854: for ($i=0;$i < $#data; $i++) {
855: my $line = $data[$i];
856: if ( $line =~ /^\#/ || $line =~ /^\s*\n/) { next; }
857: if ( $line =~ /TABLE/ ) { last; }
858: my ($tag,$descrip,$function,$show) = split(/,/, $line);
859: $insertlist{"$tagnum.tag"} = $tag;
860: $insertlist{"$tagnum.description"} = $descrip;
861: $insertlist{"$tagnum.function"} = $function;
862: $insertlist{"$tagnum.show"}= $show;
863: $tagnum++;
864: }
865: $i++; #skipping TABLE line
866: $tagnum = 0;
867: for (;$i < $#data;$i++) {
868: my $line = $data[$i];
869: my ($mnemonic,@which) = split(/ +/,$line);
870: my $tag = $insertlist{"$tagnum.tag"};
871: for (my $j=0;$j <$#which;$j++) {
872: if ( $which[$j] eq 'Y' ) {
873: if ($insertlist{"$j.show"} ne 'no') {
874: push(@{ $insertlist{"$tag.which"} },$j);
875: }
876: }
877: }
878: $tagnum++;
879: }
880: }
881: 1;
882: __END__
883:
884:
FreeBSD-CVSweb <freebsd-cvsweb@FreeBSD.org>
![[BACK]](/icons/back.gif){kind=icon}
Return to lonxml.pm CVS log ![[TXT]](/icons/text.gif){kind=icon}
![[DIR]](/icons/dir.gif){kind=icon}
Up to [LON-CAPA] / loncom / xml