File:
[LON-CAPA] /
loncom /
xml /
lonxml.pm
Revision
1.97:
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Tue Jun 26 21:45:28 2001 UTC (22 years, 11 months ago) by
albertel
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MAIN
CVS tags:
HEAD
- added delete functionality (calls Apache::edit:delete_tag which can call delete_<tagname> or handle it usong the default mechanism)
- functionalized the code that occurs when an end tag happens
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 $stack['-1']");
281: &end_tag(\@stack,\@parstack,$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: &end_tag(\@stack,\@parstack,$token);
319: }
320: }
321: pop @pars;
322: pop @Apache::lonxml::pwd;
323: }
324:
325: # if ($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 $innerstack['-1']");
366: &end_tag(\@innerstack,\@innerparstack,$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:
417: my $deleted=0;
418: $Apache::lonxml::curdepth=join('_',@Apache::lonxml::depthcounter);
419: if (($token->[0] eq 'S') && ($target eq 'modified')) {
420: $deleted=&Apache::edit::handle_delete($space,$target,$token,$tagstack,
421: $parstack,$parser,$safeeval,
422: $style);
423: }
424: if (!$deleted) {
425: if ($space) {
426: #&Apache::lonxml::debug("Calling sub $sub in $space $metamode<br />\n");
427: $sub1="$space\:\:$sub";
428: ($currentstring,$nodefault) = &$sub1($target,$token,$tagstack,
429: $parstack,$parser,$safeeval,
430: $style);
431: } else {
432: #&Apache::lonxml::debug("NOT Calling sub $sub in $space $metamode<br />\n");
433: if ($metamode <1) {
434: if (defined($token->[4]) && ($metamode < 1)) {
435: $currentstring = $token->[4];
436: } else {
437: $currentstring = $token->[2];
438: }
439: }
440: }
441: # &Apache::lonxml::debug("nodefalt:$nodefault:");
442: if ($currentstring eq '' && $nodefault eq '') {
443: if ($target eq 'edit') {
444: &Apache::lonxml::debug("doing default edit for $token->[1]");
445: if ($token->[0] eq 'S') {
446: $currentstring = &Apache::edit::tag_start($target,$token);
447: } elsif ($token->[0] eq 'E') {
448: $currentstring = &Apache::edit::tag_end($target,$token);
449: }
450: } elsif ($target eq 'modified') {
451: if ($token->[0] eq 'S') {
452: $currentstring = $token->[4];
453: $currentstring.=&Apache::edit::handle_insert();
454: } else {
455: $currentstring = $token->[2];
456: }
457: }
458: }
459: }
460: use strict 'refs';
461: }
462: return $currentstring;
463: }
464:
465: sub setup_globals {
466: my ($target)=@_;
467: if ($target eq 'meta') {
468: $Apache::lonxml::redirection = 0;
469: $Apache::lonxml::metamode = 1;
470: $Apache::lonxml::evaluate = 1;
471: $Apache::lonxml::import = 0;
472: } elsif ($target eq 'grade') {
473: &startredirection;
474: $Apache::lonxml::metamode = 0;
475: $Apache::lonxml::evaluate = 1;
476: $Apache::lonxml::import = 1;
477: } elsif ($target eq 'modified') {
478: $Apache::lonxml::redirection = 0;
479: $Apache::lonxml::metamode = 0;
480: $Apache::lonxml::evaluate = 0;
481: $Apache::lonxml::import = 0;
482: } elsif ($target eq 'edit') {
483: $Apache::lonxml::redirection = 0;
484: $Apache::lonxml::metamode = 0;
485: $Apache::lonxml::evaluate = 0;
486: $Apache::lonxml::import = 0;
487: } else {
488: $Apache::lonxml::redirection = 0;
489: $Apache::lonxml::metamode = 0;
490: $Apache::lonxml::evaluate = 1;
491: $Apache::lonxml::import = 1;
492: }
493: }
494:
495: sub init_safespace {
496: my ($target,$safeeval,$safehole,$safeinit) = @_;
497: $safeeval->permit("entereval");
498: $safeeval->permit(":base_math");
499: $safeeval->permit("sort");
500: $safeeval->deny(":base_io");
501: $safehole->wrap(\&Apache::lonnet::EXT,$safeeval,'&EXT');
502:
503: $safehole->wrap(\&Math::Cephes::asin,$safeeval,'&asin');
504: $safehole->wrap(\&Math::Cephes::acos,$safeeval,'&acos');
505: $safehole->wrap(\&Math::Cephes::atan,$safeeval,'&atan');
506: $safehole->wrap(\&Math::Cephes::sinh,$safeeval,'&sinh');
507: $safehole->wrap(\&Math::Cephes::cosh,$safeeval,'&cosh');
508: $safehole->wrap(\&Math::Cephes::tanh,$safeeval,'&tanh');
509: $safehole->wrap(\&Math::Cephes::asinh,$safeeval,'&asinh');
510: $safehole->wrap(\&Math::Cephes::acosh,$safeeval,'&acosh');
511: $safehole->wrap(\&Math::Cephes::atanh,$safeeval,'&atanh');
512: $safehole->wrap(\&Math::Cephes::erf,$safeeval,'&erf');
513: $safehole->wrap(\&Math::Cephes::erfc,$safeeval,'&erfc');
514: $safehole->wrap(\&Math::Cephes::j0,$safeeval,'&j0');
515: $safehole->wrap(\&Math::Cephes::j1,$safeeval,'&j1');
516: $safehole->wrap(\&Math::Cephes::jn,$safeeval,'&jn');
517: $safehole->wrap(\&Math::Cephes::jv,$safeeval,'&jv');
518: $safehole->wrap(\&Math::Cephes::y0,$safeeval,'&y0');
519: $safehole->wrap(\&Math::Cephes::y1,$safeeval,'&y1');
520: $safehole->wrap(\&Math::Cephes::yn,$safeeval,'&yn');
521: $safehole->wrap(\&Math::Cephes::yv,$safeeval,'&yv');
522: $safehole->wrap(\&Math::Random::random_beta,$safeeval,'&math_random_beta');
523: $safehole->wrap(\&Math::Random::random_chi_square,$safeeval,'&math_random_chi_square');
524: $safehole->wrap(\&Math::Random::random_exponential,$safeeval,'&math_random_exponential');
525: $safehole->wrap(\&Math::Random::random_f,$safeeval,'&math_random_f');
526: $safehole->wrap(\&Math::Random::random_gamma,$safeeval,'&math_random_gamma');
527: $safehole->wrap(\&Math::Random::random_multivariate_normal,$safeeval,'&math_random_multivariate_normal');
528: $safehole->wrap(\&Math::Random::random_multinomial,$safeeval,'&math_random_multinomial');
529: $safehole->wrap(\&Math::Random::random_noncentral_chi_square,$safeeval,'&math_random_noncentral_chi_square');
530: $safehole->wrap(\&Math::Random::random_noncentral_f,$safeeval,'&math_random_noncentral_f');
531: $safehole->wrap(\&Math::Random::random_normal,$safeeval,'&math_random_normal');
532: $safehole->wrap(\&Math::Random::random_permutation,$safeeval,'&math_random_permutation');
533: $safehole->wrap(\&Math::Random::random_permuted_index,$safeeval,'&math_random_permuted_index');
534: $safehole->wrap(\&Math::Random::random_uniform,$safeeval,'&math_random_uniform');
535: $safehole->wrap(\&Math::Random::random_poisson,$safeeval,'&math_random_poisson');
536: $safehole->wrap(\&Math::Random::random_uniform_integer,$safeeval,'&math_random_uniform_integer');
537: $safehole->wrap(\&Math::Random::random_negative_binomial,$safeeval,'&math_random_negative_binomial');
538: $safehole->wrap(\&Math::Random::random_binomial,$safeeval,'&math_random_binomial');
539: $safehole->wrap(\&Math::Random::random_seed_from_phrase,$safeeval,'&random_seed_from_phrase');
540: $safehole->wrap(\&Math::Random::random_set_seed_from_phrase,$safeeval,'&random_set_seed_from_phrase');
541: $safehole->wrap(\&Math::Random::random_get_seed,$safeeval,'&random_get_seed');
542: $safehole->wrap(\&Math::Random::random_set_seed,$safeeval,'&random_set_seed');
543:
544: #need to inspect this class of ops
545: # $safeeval->deny(":base_orig");
546: $safeinit .= ';$external::target="'.$target.'";';
547: $safeinit .= ';$external::randomseed='.&Apache::lonnet::rndseed().';';
548: &Apache::run::run($safeinit,$safeeval);
549: }
550:
551: sub startredirection {
552: $Apache::lonxml::redirection++;
553: push (@Apache::lonxml::outputstack, '');
554: }
555:
556: sub endredirection {
557: if (!$Apache::lonxml::redirection) {
558: &Apache::lonxml::error("Endredirection was called, before a startredirection, perhaps you have unbalanced tags. Some debuging information:".join ":",caller);
559: return '';
560: }
561: $Apache::lonxml::redirection--;
562: pop @Apache::lonxml::outputstack;
563: }
564:
565: sub end_tag {
566: my ($tagstack,$parstack,$token)=@_;
567: pop(@$tagstack);
568: pop(@$parstack);
569: &decreasedepth($token);
570: }
571:
572: sub initdepth {
573: @Apache::lonxml::depthcounter=();
574: $Apache::lonxml::depth=-1;
575: $Apache::lonxml::olddepth=-1;
576: }
577:
578: sub increasedepth {
579: my ($token) = @_;
580: $Apache::lonxml::depth++;
581: $Apache::lonxml::depthcounter[$Apache::lonxml::depth]++;
582: if ($Apache::lonxml::depthcounter[$Apache::lonxml::depth]==1) {
583: $Apache::lonxml::olddepth=$Apache::lonxml::depth;
584: }
585: my $curdepth=join('_',@Apache::lonxml::depthcounter);
586: &Apache::lonxml::debug("s $Apache::lonxml::depth : $Apache::lonxml::olddepth : $curdepth : $token->[1]\n");
587: #print "<br />s $Apache::lonxml::depth : $Apache::lonxml::olddepth : $curdepth : $token->[1]\n";
588: }
589:
590: sub decreasedepth {
591: my ($token) = @_;
592: $Apache::lonxml::depth--;
593: if ($Apache::lonxml::depth<$Apache::lonxml::olddepth-1) {
594: $#Apache::lonxml::depthcounter--;
595: $Apache::lonxml::olddepth=$Apache::lonxml::depth+1;
596: }
597: if ( $Apache::lonxml::depth < -1) {
598: &Apache::lonxml::warning("Unbalanced tags in resource");
599: $Apache::lonxml::depth='-1';
600: }
601: my $curdepth=join('_',@Apache::lonxml::depthcounter);
602: &Apache::lonxml::debug("e $Apache::lonxml::depth : $Apache::lonxml::olddepth : $token->[1] : $curdepth\n");
603: #print "<br />e $Apache::lonxml::depth : $Apache::lonxml::olddepth : $token->[1] : $curdepth\n";
604: }
605:
606: sub get_all_text {
607:
608: my($tag,$pars)= @_;
609: my $depth=0;
610: my $token;
611: my $result='';
612: if ( $tag =~ m:^/: ) {
613: my $tag=substr($tag,1);
614: # &Apache::lonxml::debug("have:$tag:");
615: while (($depth >=0) && ($token = $pars->get_token)) {
616: # &Apache::lonxml::debug("e token:$token->[0]:$depth:$token->[1]");
617: if (($token->[0] eq 'T')||($token->[0] eq 'C')||($token->[0] eq 'D')) {
618: $result.=$token->[1];
619: } elsif ($token->[0] eq 'PI') {
620: $result.=$token->[2];
621: } elsif ($token->[0] eq 'S') {
622: if ($token->[1] eq $tag) { $depth++; }
623: $result.=$token->[4];
624: } elsif ($token->[0] eq 'E') {
625: if ( $token->[1] eq $tag) { $depth--; }
626: #skip sending back the last end tag
627: if ($depth > -1) { $result.=$token->[2]; } else {
628: $pars->unget_token($token);
629: }
630: }
631: }
632: } else {
633: while ($token = $pars->get_token) {
634: # &Apache::lonxml::debug("s token:$token->[0]:$depth:$token->[1]");
635: if (($token->[0] eq 'T')||($token->[0] eq 'C')||($token->[0] eq 'D')) {
636: $result.=$token->[1];
637: } elsif ($token->[0] eq 'PI') {
638: $result.=$token->[2];
639: } elsif ($token->[0] eq 'S') {
640: if ( $token->[1] eq $tag) {
641: $pars->unget_token($token); last;
642: } else {
643: $result.=$token->[4];
644: }
645: } elsif ($token->[0] eq 'E') {
646: $result.=$token->[2];
647: }
648: }
649: }
650: # &Apache::lonxml::debug("Exit:$result:");
651: return $result
652: }
653:
654: sub newparser {
655: my ($parser,$contentref,$dir) = @_;
656: push (@$parser,HTML::TokeParser->new($contentref));
657: $$parser['-1']->xml_mode('1');
658: if ( $dir eq '' ) {
659: push (@Apache::lonxml::pwd, $Apache::lonxml::pwd[$#Apache::lonxml::pwd]);
660: } else {
661: push (@Apache::lonxml::pwd, $dir);
662: }
663: # &Apache::lonxml::debug("pwd:$#Apache::lonxml::pwd");
664: # &Apache::lonxml::debug("pwd:$Apache::lonxml::pwd[$#Apache::lonxml::pwd]");
665: }
666:
667: sub parstring {
668: my ($token) = @_;
669: my $temp='';
670: map {
671: unless ($_=~/\W/) {
672: my $val=$token->[2]->{$_};
673: $val =~ s/([\%\@\\])/\\$1/g;
674: #if ($val =~ m/^[\%\@]/) { $val="\\".$val; }
675: $temp .= "my \$$_=\"$val\";"
676: }
677: } @{$token->[3]};
678: return $temp;
679: }
680:
681: sub writeallows {
682: my $thisurl='/res/'.&Apache::lonnet::declutter(shift);
683: my $thisdir=$thisurl;
684: $thisdir=~s/\/[^\/]+$//;
685: my %httpref=();
686: map {
687: $httpref{'httpref.'.
688: &Apache::lonnet::hreflocation($thisdir,$_)}=$thisurl; } @extlinks;
689: &Apache::lonnet::appenv(%httpref);
690: }
691:
692: #
693: # Afterburner handles anchors, highlights and links
694: #
695: sub afterburn {
696: my $result=shift;
697: map {
698: my ($name, $value) = split(/=/,$_);
699: $value =~ tr/+/ /;
700: $value =~ s/%([a-fA-F0-9][a-fA-F0-9])/pack("C",hex($1))/eg;
701: if (($name eq 'highlight')||($name eq 'anchor')||($name eq 'link')) {
702: unless ($ENV{'form.'.$name}) {
703: $ENV{'form.'.$name}=$value;
704: }
705: }
706: } (split(/&/,$ENV{'QUERY_STRING'}));
707: if ($ENV{'form.highlight'}) {
708: map {
709: my $anchorname=$_;
710: my $matchthis=$anchorname;
711: $matchthis=~s/\_+/\\s\+/g;
712: $result=~s/($matchthis)/\<font color=\"red\"\>$1\<\/font\>/gs;
713: } split(/\,/,$ENV{'form.highlight'});
714: }
715: if ($ENV{'form.link'}) {
716: map {
717: my ($anchorname,$linkurl)=split(/\>/,$_);
718: my $matchthis=$anchorname;
719: $matchthis=~s/\_+/\\s\+/g;
720: $result=~s/($matchthis)/\<a href=\"$linkurl\"\>$1\<\/a\>/gs;
721: } split(/\,/,$ENV{'form.link'});
722: }
723: if ($ENV{'form.anchor'}) {
724: my $anchorname=$ENV{'form.anchor'};
725: my $matchthis=$anchorname;
726: $matchthis=~s/\_+/\\s\+/g;
727: $result=~s/($matchthis)/\<a name=\"$anchorname\"\>$1\<\/a\>/s;
728: $result.=(<<"ENDSCRIPT");
729: <script>
730: document.location.hash='$anchorname';
731: </script>
732: ENDSCRIPT
733: }
734: return $result;
735: }
736:
737: sub storefile {
738: my ($file,$contents)=@_;
739: if (my $fh=Apache::File->new('>'.$file)) {
740: print $fh $contents;
741: $fh->close();
742: }
743: }
744:
745: sub inserteditinfo {
746: my ($result,$filecontents)=@_;
747: unless ($filecontents) {
748: $filecontents=(<<SIMPLECONTENT);
749: <html>
750: <head>
751: <title>
752: Title of Document Goes Here
753: </title>
754: </head>
755: <body bgcolor="#FFFFFF">
756:
757: Body of Document Goes Here
758:
759: </body>
760: </html>
761: SIMPLECONTENT
762: }
763: my $editheader='<a href="#editsection">Edit below</a><hr />';
764: my $editfooter=(<<ENDFOOTER);
765: <hr />
766: <a name="editsection" />
767: <form method="post">
768: <textarea cols="80" rows="40" name="filecont">$filecontents</textarea>
769: <br />
770: <input type="submit" name="savethisfile" value="Save this file" />
771: </form>
772: ENDFOOTER
773: $result=~s/(\<body[^\>]*\>)/$1$editheader/is;
774: $result=~s/(\<\/body\>)/$editfooter/is;
775: return $result;
776: }
777:
778: sub handler {
779: my $request=shift;
780:
781: my $target='web';
782:
783: $Apache::lonxml::debug=0;
784:
785: if ($ENV{'browser.mathml'}) {
786: $request->content_type('text/xml');
787: } else {
788: $request->content_type('text/html');
789: }
790:
791: $request->send_http_header;
792:
793: return OK if $request->header_only;
794:
795:
796: my $file=&Apache::lonnet::filelocation("",$request->uri);
797: #
798: # Edit action? Save file.
799: #
800: unless ($ENV{'request.state'} eq 'published') {
801: if ($ENV{'form.savethisfile'}) {
802: &storefile($file,$ENV{'form.filecont'});
803: }
804: }
805: my %mystyle;
806: my $result = '';
807: my $filecontents=&Apache::lonnet::getfile($file);
808: if ($filecontents == -1) {
809: $result=(<<ENDNOTFOUND);
810: <html>
811: <head>
812: <title>File not found</title>
813: </head>
814: <body bgcolor="#FFFFFF">
815: <b>File not found: $file</b>
816: </body>
817: </html>
818: ENDNOTFOUND
819: $filecontents='';
820: } else {
821: $result = &Apache::lonxml::xmlparse($target,$filecontents,'',%mystyle);
822: }
823:
824: #
825: # Edit action? Insert editing commands
826: #
827: unless ($ENV{'request.state'} eq 'published') {
828: $result=&inserteditinfo($result,$filecontents);
829: }
830:
831: $request->print($result);
832:
833: writeallows($request->uri);
834: return OK;
835: }
836:
837: sub debug {
838: if ($Apache::lonxml::debug eq 1) {
839: print("DEBUG:".$_[0]."<br />\n");
840: }
841: }
842:
843: sub error {
844: if (($Apache::lonxml::debug eq 1) || ($ENV{'request.state'} eq 'construct') ) {
845: print "<b>ERROR:</b>".$_[0]."<br />\n";
846: } else {
847: print "<b>An Error occured while processing this resource. The instructor has been notified.</b> <br />";
848: #notify author
849: &Apache::lonmsg::author_res_msg($ENV{'request.filename'},$_[0]);
850: #notify course
851: if ( $ENV{'request.course.id'} ) {
852: my $users=$ENV{'course.'.$ENV{'request.course.id'}.'.comment.email'};
853: foreach my $user (split /\,/, $users) {
854: ($user,my $domain) = split /:/, $user;
855: &Apache::lonmsg::user_normal_msg($user,$domain,"Error in $ENV{'request.filename'}",$_[0]);
856: }
857: }
858:
859: #FIXME probably shouldn't have me get everything forever.
860: &Apache::lonmsg::user_normal_msg('albertel','msu',"Error in $ENV{'request.filename'}",$_[0]);
861: #&Apache::lonmsg::user_normal_msg('albertel','103',"Error in $ENV{'request.filename'}",$_[0]);
862: }
863: }
864:
865: sub warning {
866: if ($ENV{'request.state'} eq 'construct') {
867: print "<b>W</b>ARNING<b>:</b>".$_[0]."<br />\n";
868: }
869: }
870:
871: sub get_param {
872: my ($param,$parstack,$safeeval,$context) = @_;
873: if ( ! $context ) { $context = -1; }
874: my $args ='';
875: if ( $#$parstack > (-2-$context) ) { $args=$$parstack[$context]; }
876: return &Apache::run::run("{$args;".'return $'.$param.'}',$safeeval); #'
877: }
878:
879: sub register_insert {
880: my @data = split /\n/, &Apache::lonnet::getfile('/home/httpd/lonTabs/insertlist.tab');
881: my $i;
882: my $tagnum=0;
883: my @order;
884: for ($i=0;$i < $#data; $i++) {
885: my $line = $data[$i];
886: if ( $line =~ /^\#/ || $line =~ /^\s*\n/) { next; }
887: if ( $line =~ /TABLE/ ) { last; }
888: my ($tag,$descrip,$color,$function,$show) = split(/,/, $line);
889: $insertlist{"$tagnum.tag"} = $tag;
890: $insertlist{"$tagnum.description"} = $descrip;
891: $insertlist{"$tagnum.color"} = $color;
892: $insertlist{"$tagnum.function"} = $function;
893: $insertlist{"$tagnum.show"}= $show;
894: $insertlist{"$tag.num"}=$tagnum;
895: $tagnum++;
896: }
897: $i++; #skipping TABLE line
898: $tagnum = 0;
899: for (;$i < $#data;$i++) {
900: my $line = $data[$i];
901: my ($mnemonic,@which) = split(/ +/,$line);
902: my $tag = $insertlist{"$tagnum.tag"};
903: for (my $j=0;$j <$#which;$j++) {
904: if ( $which[$j] eq 'Y' ) {
905: if ($insertlist{"$j.show"} ne 'no') {
906: push(@{ $insertlist{"$tag.which"} },$j);
907: }
908: }
909: }
910: $tagnum++;
911: }
912: }
913: 1;
914: __END__
915:
916:
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