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: menu.switchbutton
151: (9,1,'sbkm.gif','set','bookmark','set_bookmark()');
152: menu.switchbutton
153: (9,2,'vbkm.gif','view','bookmark','edit_bookmarks()');
154: menu.switchbutton
155: (9,3,'anot.gif','anno-','tations','gopost("/adm/annotations",currentURL)');
156:
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,$safeinit,%style_for_target) = @_;
228: if ($target eq 'meta') {
229: $Apache::lonxml::redirection = 0;
230: $Apache::lonxml::metamode = 1;
231: $Apache::lonxml::evaluate = 1;
232: $Apache::lonxml::import = 0;
233: } elsif ($target eq 'grade') {
234: &startredirection;
235: $Apache::lonxml::metamode = 0;
236: $Apache::lonxml::evaluate = 1;
237: $Apache::lonxml::import = 1;
238: } elsif ($target eq 'modified') {
239: $Apache::lonxml::redirection = 0;
240: $Apache::lonxml::metamode = 0;
241: $Apache::lonxml::evaluate = 0;
242: $Apache::lonxml::import = 0;
243: } else {
244: $Apache::lonxml::redirection = 0;
245: $Apache::lonxml::metamode = 0;
246: $Apache::lonxml::evaluate = 1;
247: $Apache::lonxml::import = 1;
248: }
249: #&printalltags();
250: my @pars = ();
251: @Apache::lonxml::pwd=();
252: my $pwd=$ENV{'request.filename'};
253: $pwd =~ s:/[^/]*$::;
254: &newparser(\@pars,\$content_file_string,$pwd);
255: my $currentstring = '';
256: my $finaloutput = '';
257: my $newarg = '';
258: my $result;
259:
260: my $safeeval = new Safe;
261: my $safehole = new Safe::Hole;
262: &init_safespace($target,$safeeval,$safehole,$safeinit);
263: #-------------------- Redefinition of the target in the case of compound target
264:
265: ($target, my @tenta) = split('&&',$target);
266:
267: my @stack = ();
268: my @parstack = ();
269: &initdepth;
270: my $token;
271: while ( $#pars > -1 ) {
272: while ($token = $pars[$#pars]->get_token) {
273: if (($token->[0] eq 'T') || ($token->[0] eq 'C') || ($token->[0] eq 'D') ) {
274: if ($metamode<1) { $result=$token->[1]; }
275: } elsif ($token->[0] eq 'PI') {
276: if ($metamode<1) { $result=$token->[2]; }
277: } elsif ($token->[0] eq 'S') {
278: # add tag to stack
279: push (@stack,$token->[1]);
280: # add parameters list to another stack
281: push (@parstack,&parstring($token));
282: &increasedepth($token);
283: if (exists $style_for_target{$token->[1]}) {
284: if ($Apache::lonxml::redirection) {
285: $Apache::lonxml::outputstack['-1'] .=
286: &recurse($style_for_target{$token->[1]},$target,$safeeval,
287: \%style_for_target,@parstack);
288: } else {
289: $finaloutput .= &recurse($style_for_target{$token->[1]},$target,
290: $safeeval,\%style_for_target,@parstack);
291: }
292: } else {
293: $result = &callsub("start_$token->[1]", $target, $token, \@stack,
294: \@parstack, \@pars, $safeeval, \%style_for_target);
295: }
296: } elsif ($token->[0] eq 'E') {
297: #clear out any tags that didn't end
298: while ($token->[1] ne $stack[$#stack] && ($#stack > -1)) {
299: &Apache::lonxml::warning("Unbalanced tags in resource $stack['-1']");
300: pop @stack;pop @parstack;&decreasedepth($token);
301: }
302:
303: if (exists $style_for_target{'/'."$token->[1]"}) {
304: if ($Apache::lonxml::redirection) {
305: $Apache::lonxml::outputstack['-1'] .=
306: &recurse($style_for_target{'/'."$token->[1]"},
307: $target,$safeeval,\%style_for_target,@parstack);
308: } else {
309: $finaloutput .= &recurse($style_for_target{'/'."$token->[1]"},
310: $target,$safeeval,\%style_for_target,
311: @parstack);
312: }
313:
314: } else {
315: $result = &callsub("end_$token->[1]", $target, $token, \@stack,
316: \@parstack, \@pars,$safeeval, \%style_for_target);
317: }
318: } else {
319: &Apache::lonxml::error("Unknown token event :$token->[0]:$token->[1]:");
320: }
321: #evaluate variable refs in result
322: if ($result ne "") {
323: if ( $#parstack > -1 ) {
324: if ($Apache::lonxml::redirection) {
325: $Apache::lonxml::outputstack['-1'] .=
326: &Apache::run::evaluate($result,$safeeval,$parstack[$#parstack]);
327: } else {
328: $finaloutput .= &Apache::run::evaluate($result,$safeeval,
329: $parstack[$#parstack]);
330: }
331: } else {
332: $finaloutput .= &Apache::run::evaluate($result,$safeeval,'');
333: }
334: $result = '';
335: }
336: if ($token->[0] eq 'E') {
337: pop @stack;pop @parstack;&decreasedepth($token);
338: }
339: }
340: pop @pars;
341: pop @Apache::lonxml::pwd;
342: }
343:
344: # if ($target eq 'meta') {
345: # $finaloutput.=&endredirection;
346: # }
347:
348: if (($ENV{'QUERY_STRING'}) && ($target eq 'web')) {
349: $finaloutput=&afterburn($finaloutput);
350: }
351:
352: return $finaloutput;
353: }
354:
355:
356: sub recurse {
357:
358: my @innerstack = ();
359: my @innerparstack = ();
360: my ($newarg,$target,$safeeval,$style_for_target,@parstack) = @_;
361: my @pat = ();
362: &newparser(\@pat,\$newarg);
363: my $tokenpat;
364: my $partstring = '';
365: my $output='';
366: my $decls='';
367: while ( $#pat > -1 ) {
368: while ($tokenpat = $pat[$#pat]->get_token) {
369: if (($tokenpat->[0] eq 'T') || ($tokenpat->[0] eq 'C') || ($tokenpat->[0] eq 'D') ) {
370: if ($metamode<1) { $partstring=$tokenpat->[1]; }
371: } elsif ($tokenpat->[0] eq 'PI') {
372: if ($metamode<1) { $partstring=$tokenpat->[2]; }
373: } elsif ($tokenpat->[0] eq 'S') {
374: push (@innerstack,$tokenpat->[1]);
375: push (@innerparstack,&parstring($tokenpat));
376: &increasedepth($tokenpat);
377: $partstring = &callsub("start_$tokenpat->[1]", $target, $tokenpat,
378: \@innerstack, \@innerparstack, \@pat,
379: $safeeval, $style_for_target);
380: } elsif ($tokenpat->[0] eq 'E') {
381: #clear out any tags that didn't end
382: while ($tokenpat->[1] ne $innerstack[$#innerstack]
383: && ($#innerstack > -1)) {
384: &Apache::lonxml::warning("Unbalanced tags in resource $innerstack['-1']");
385: pop @innerstack;pop @innerparstack;&decreasedepth($tokenpat);
386: }
387: $partstring = &callsub("end_$tokenpat->[1]", $target, $tokenpat,
388: \@innerstack, \@innerparstack, \@pat,
389: $safeeval, $style_for_target);
390: } else {
391: &Apache::lonxml::error("Unknown token event :$tokenpat->[0]:$tokenpat->[1]:");
392: }
393: #pass both the variable to the style tag, and the tag we
394: #are processing inside the <definedtag>
395: if ( $partstring ne "" ) {
396: if ( $#parstack > -1 ) {
397: if ( $#innerparstack > -1 ) {
398: $decls= $parstack[$#parstack].$innerparstack[$#innerparstack];
399: } else {
400: $decls= $parstack[$#parstack];
401: }
402: } else {
403: if ( $#innerparstack > -1 ) {
404: $decls=$innerparstack[$#innerparstack];
405: } else {
406: $decls='';
407: }
408: }
409: $output .= &Apache::run::evaluate($partstring,$safeeval,$decls);
410: $partstring = '';
411: }
412: if ($tokenpat->[0] eq 'E') { pop @innerstack;pop @innerparstack;
413: &decreasedepth($tokenpat);}
414: }
415: pop @pat;
416: pop @Apache::lonxml::pwd;
417: }
418: return $output;
419: }
420:
421: sub callsub {
422: my ($sub,$target,$token,$tagstack,$parstack,$parser,$safeeval,$style)=@_;
423: my $currentstring='';
424: my $nodefault;
425: {
426: my $sub1;
427: no strict 'refs';
428: my $tag=$token->[1];
429: my $space=$Apache::lonxml::alltags{$tag};
430: if (!$space) {
431: $tag=~tr/A-Z/a-z/;
432: $sub=~tr/A-Z/a-z/;
433: $space=$Apache::lonxml::alltags{$tag}
434: }
435: if ($space) {
436: #&Apache::lonxml::debug("Calling sub $sub in $space $metamode<br />\n");
437: $sub1="$space\:\:$sub";
438: $Apache::lonxml::curdepth=join('_',@Apache::lonxml::depthcounter);
439: ($currentstring,$nodefault) = &$sub1($target,$token,$tagstack,
440: $parstack,$parser,$safeeval,
441: $style);
442: } else {
443: #&Apache::lonxml::debug("NOT Calling sub $sub in $space $metamode<br />\n");
444: if ($metamode <1) {
445: if (defined($token->[4]) && ($metamode < 1)) {
446: $currentstring = $token->[4];
447: } else {
448: $currentstring = $token->[2];
449: }
450: }
451: }
452: # &Apache::lonxml::debug("nodefalt:$nodefault:");
453: if ($currentstring eq '' && $nodefault eq '') {
454: if ($target eq 'edit') {
455: &Apache::lonxml::debug("doing default edit for $token->[1]");
456: if ($token->[0] eq 'S') {
457: $currentstring = &Apache::edit::tag_start($target,$token);
458: } elsif ($token->[0] eq 'E') {
459: $currentstring = &Apache::edit::tag_end($target,$token);
460: }
461: } elsif ($target eq 'modified') {
462: if ($token->[0] eq 'S') {
463: $currentstring = $token->[4];
464: $currentstring.=&Apache::edit::handle_insert();
465: } else {
466: $currentstring = $token->[2];
467: }
468: }
469: }
470: use strict 'refs';
471: }
472: return $currentstring;
473: }
474:
475: sub init_safespace {
476: my ($target,$safeeval,$safehole,$safeinit) = @_;
477: $safeeval->permit("entereval");
478: $safeeval->permit(":base_math");
479: $safeeval->permit("sort");
480: $safeeval->deny(":base_io");
481: $safehole->wrap(\&Apache::lonnet::EXT,$safeeval,'&EXT');
482:
483: $safehole->wrap(\&Math::Cephes::asin,$safeeval,'&asin');
484: $safehole->wrap(\&Math::Cephes::acos,$safeeval,'&acos');
485: $safehole->wrap(\&Math::Cephes::atan,$safeeval,'&atan');
486: $safehole->wrap(\&Math::Cephes::sinh,$safeeval,'&sinh');
487: $safehole->wrap(\&Math::Cephes::cosh,$safeeval,'&cosh');
488: $safehole->wrap(\&Math::Cephes::tanh,$safeeval,'&tanh');
489: $safehole->wrap(\&Math::Cephes::asinh,$safeeval,'&asinh');
490: $safehole->wrap(\&Math::Cephes::acosh,$safeeval,'&acosh');
491: $safehole->wrap(\&Math::Cephes::atanh,$safeeval,'&atanh');
492: $safehole->wrap(\&Math::Cephes::erf,$safeeval,'&erf');
493: $safehole->wrap(\&Math::Cephes::erfc,$safeeval,'&erfc');
494: $safehole->wrap(\&Math::Cephes::j0,$safeeval,'&j0');
495: $safehole->wrap(\&Math::Cephes::j1,$safeeval,'&j1');
496: $safehole->wrap(\&Math::Cephes::jn,$safeeval,'&jn');
497: $safehole->wrap(\&Math::Cephes::jv,$safeeval,'&jv');
498: $safehole->wrap(\&Math::Cephes::y0,$safeeval,'&y0');
499: $safehole->wrap(\&Math::Cephes::y1,$safeeval,'&y1');
500: $safehole->wrap(\&Math::Cephes::yn,$safeeval,'&yn');
501: $safehole->wrap(\&Math::Cephes::yv,$safeeval,'&yv');
502: $safehole->wrap(\&Math::Random::random_beta,$safeeval,'&math_random_beta');
503: $safehole->wrap(\&Math::Random::random_chi_square,$safeeval,'&math_random_chi_square');
504: $safehole->wrap(\&Math::Random::random_exponential,$safeeval,'&math_random_exponential');
505: $safehole->wrap(\&Math::Random::random_f,$safeeval,'&math_random_f');
506: $safehole->wrap(\&Math::Random::random_gamma,$safeeval,'&math_random_gamma');
507: $safehole->wrap(\&Math::Random::random_multivariate_normal,$safeeval,'&math_random_multivariate_normal');
508: $safehole->wrap(\&Math::Random::random_multinomial,$safeeval,'&math_random_multinomial');
509: $safehole->wrap(\&Math::Random::random_noncentral_chi_square,$safeeval,'&math_random_noncentral_chi_square');
510: $safehole->wrap(\&Math::Random::random_noncentral_f,$safeeval,'&math_random_noncentral_f');
511: $safehole->wrap(\&Math::Random::random_normal,$safeeval,'&math_random_normal');
512: $safehole->wrap(\&Math::Random::random_permutation,$safeeval,'&math_random_permutation');
513: $safehole->wrap(\&Math::Random::random_permuted_index,$safeeval,'&math_random_permuted_index');
514: $safehole->wrap(\&Math::Random::random_uniform,$safeeval,'&math_random_uniform');
515: $safehole->wrap(\&Math::Random::random_poisson,$safeeval,'&math_random_poisson');
516: $safehole->wrap(\&Math::Random::random_uniform_integer,$safeeval,'&math_random_uniform_integer');
517: $safehole->wrap(\&Math::Random::random_negative_binomial,$safeeval,'&math_random_negative_binomial');
518: $safehole->wrap(\&Math::Random::random_binomial,$safeeval,'&math_random_binomial');
519: $safehole->wrap(\&Math::Random::random_seed_from_phrase,$safeeval,'&random_seed_from_phrase');
520: $safehole->wrap(\&Math::Random::random_set_seed_from_phrase,$safeeval,'&random_set_seed_from_phrase');
521: $safehole->wrap(\&Math::Random::random_get_seed,$safeeval,'&random_get_seed');
522: $safehole->wrap(\&Math::Random::random_set_seed,$safeeval,'&random_set_seed');
523:
524: #need to inspect this class of ops
525: # $safeeval->deny(":base_orig");
526: $safeinit .= ';$external::target="'.$target.'";';
527: $safeinit .= ';$external::randomseed='.&Apache::lonnet::rndseed().';';
528: &Apache::run::run($safeinit,$safeeval);
529: }
530:
531: sub startredirection {
532: $Apache::lonxml::redirection++;
533: push (@Apache::lonxml::outputstack, '');
534: }
535:
536: sub endredirection {
537: if (!$Apache::lonxml::redirection) {
538: &Apache::lonxml::error("Endredirection was called, before a startredirection, perhaps you have unbalanced tags. Some debuging information:".join ":",caller);
539: return '';
540: }
541: $Apache::lonxml::redirection--;
542: pop @Apache::lonxml::outputstack;
543: }
544:
545: sub initdepth {
546: @Apache::lonxml::depthcounter=();
547: $Apache::lonxml::depth=-1;
548: $Apache::lonxml::olddepth=-1;
549: }
550:
551: sub increasedepth {
552: my ($token) = @_;
553: $Apache::lonxml::depth++;
554: $Apache::lonxml::depthcounter[$Apache::lonxml::depth]++;
555: if ($Apache::lonxml::depthcounter[$Apache::lonxml::depth]==1) {
556: $Apache::lonxml::olddepth=$Apache::lonxml::depth;
557: }
558: my $curdepth=join('_',@Apache::lonxml::depthcounter);
559: &Apache::lonxml::debug("s $Apache::lonxml::depth : $Apache::lonxml::olddepth : $curdepth : $token->[1]\n");
560: #print "<br />s $Apache::lonxml::depth : $Apache::lonxml::olddepth : $curdepth : $token->[1]\n";
561: }
562:
563: sub decreasedepth {
564: my ($token) = @_;
565: $Apache::lonxml::depth--;
566: if ($Apache::lonxml::depth<$Apache::lonxml::olddepth-1) {
567: $#Apache::lonxml::depthcounter--;
568: $Apache::lonxml::olddepth=$Apache::lonxml::depth+1;
569: }
570: if ( $Apache::lonxml::depth < -1) {
571: &Apache::lonxml::warning("Unbalanced tags in resource");
572: $Apache::lonxml::depth='-1';
573: }
574: my $curdepth=join('_',@Apache::lonxml::depthcounter);
575: &Apache::lonxml::debug("e $Apache::lonxml::depth : $Apache::lonxml::olddepth : $token->[1] : $curdepth\n");
576: #print "<br />e $Apache::lonxml::depth : $Apache::lonxml::olddepth : $token->[1] : $curdepth\n";
577: }
578:
579: sub get_all_text {
580:
581: my($tag,$pars)= @_;
582: my $depth=0;
583: my $token;
584: my $result='';
585: if ( $tag =~ m:^/: ) {
586: my $tag=substr($tag,1);
587: # &Apache::lonxml::debug("have:$tag:");
588: while (($depth >=0) && ($token = $pars->get_token)) {
589: # &Apache::lonxml::debug("e token:$token->[0]:$depth:$token->[1]");
590: if (($token->[0] eq 'T')||($token->[0] eq 'C')||($token->[0] eq 'D')) {
591: $result.=$token->[1];
592: } elsif ($token->[0] eq 'PI') {
593: $result.=$token->[2];
594: } elsif ($token->[0] eq 'S') {
595: if ($token->[1] eq $tag) { $depth++; }
596: $result.=$token->[4];
597: } elsif ($token->[0] eq 'E') {
598: if ( $token->[1] eq $tag) { $depth--; }
599: #skip sending back the last end tag
600: if ($depth > -1) { $result.=$token->[2]; } else {
601: $pars->unget_token($token);
602: }
603: }
604: }
605: } else {
606: while ($token = $pars->get_token) {
607: # &Apache::lonxml::debug("s token:$token->[0]:$depth:$token->[1]");
608: if (($token->[0] eq 'T')||($token->[0] eq 'C')||($token->[0] eq 'D')) {
609: $result.=$token->[1];
610: } elsif ($token->[0] eq 'PI') {
611: $result.=$token->[2];
612: } elsif ($token->[0] eq 'S') {
613: if ( $token->[1] eq $tag) {
614: $pars->unget_token($token); last;
615: } else {
616: $result.=$token->[4];
617: }
618: } elsif ($token->[0] eq 'E') {
619: $result.=$token->[2];
620: }
621: }
622: }
623: # &Apache::lonxml::debug("Exit:$result:");
624: return $result
625: }
626:
627: sub newparser {
628: my ($parser,$contentref,$dir) = @_;
629: push (@$parser,HTML::TokeParser->new($contentref));
630: $$parser['-1']->xml_mode('1');
631: if ( $dir eq '' ) {
632: push (@Apache::lonxml::pwd, $Apache::lonxml::pwd[$#Apache::lonxml::pwd]);
633: } else {
634: push (@Apache::lonxml::pwd, $dir);
635: }
636: # &Apache::lonxml::debug("pwd:$#Apache::lonxml::pwd");
637: # &Apache::lonxml::debug("pwd:$Apache::lonxml::pwd[$#Apache::lonxml::pwd]");
638: }
639:
640: sub parstring {
641: my ($token) = @_;
642: my $temp='';
643: map {
644: unless ($_=~/\W/) {
645: my $val=$token->[2]->{$_};
646: $val =~ s/([\%\@\\])/\\$1/g;
647: #if ($val =~ m/^[\%\@]/) { $val="\\".$val; }
648: $temp .= "my \$$_=\"$val\";"
649: }
650: } @{$token->[3]};
651: return $temp;
652: }
653:
654: sub writeallows {
655: my $thisurl='/res/'.&Apache::lonnet::declutter(shift);
656: my $thisdir=$thisurl;
657: $thisdir=~s/\/[^\/]+$//;
658: my %httpref=();
659: map {
660: $httpref{'httpref.'.
661: &Apache::lonnet::hreflocation($thisdir,$_)}=$thisurl; } @extlinks;
662: &Apache::lonnet::appenv(%httpref);
663: }
664:
665: #
666: # Afterburner handles anchors, highlights and links
667: #
668: sub afterburn {
669: my $result=shift;
670: map {
671: my ($name, $value) = split(/=/,$_);
672: $value =~ tr/+/ /;
673: $value =~ s/%([a-fA-F0-9][a-fA-F0-9])/pack("C",hex($1))/eg;
674: if (($name eq 'highlight')||($name eq 'anchor')||($name eq 'link')) {
675: unless ($ENV{'form.'.$name}) {
676: $ENV{'form.'.$name}=$value;
677: }
678: }
679: } (split(/&/,$ENV{'QUERY_STRING'}));
680: if ($ENV{'form.highlight'}) {
681: map {
682: my $anchorname=$_;
683: my $matchthis=$anchorname;
684: $matchthis=~s/\_+/\\s\+/g;
685: $result=~s/($matchthis)/\<font color=\"red\"\>$1\<\/font\>/gs;
686: } split(/\,/,$ENV{'form.highlight'});
687: }
688: if ($ENV{'form.link'}) {
689: map {
690: my ($anchorname,$linkurl)=split(/\>/,$_);
691: my $matchthis=$anchorname;
692: $matchthis=~s/\_+/\\s\+/g;
693: $result=~s/($matchthis)/\<a href=\"$linkurl\"\>$1\<\/a\>/gs;
694: } split(/\,/,$ENV{'form.link'});
695: }
696: if ($ENV{'form.anchor'}) {
697: my $anchorname=$ENV{'form.anchor'};
698: my $matchthis=$anchorname;
699: $matchthis=~s/\_+/\\s\+/g;
700: $result=~s/($matchthis)/\<a name=\"$anchorname\"\>$1\<\/a\>/s;
701: $result.=(<<"ENDSCRIPT");
702: <script>
703: document.location.hash='$anchorname';
704: </script>
705: ENDSCRIPT
706: }
707: return $result;
708: }
709:
710: sub storefile {
711: my ($file,$contents)=@_;
712: if (my $fh=Apache::File->new('>'.$file)) {
713: print $fh $contents;
714: $fh->close();
715: }
716: }
717:
718: sub inserteditinfo {
719: my ($result,$filecontents)=@_;
720: unless ($filecontents) {
721: $filecontents=(<<SIMPLECONTENT);
722: <html>
723: <head>
724: <title>
725: Title of Document Goes Here
726: </title>
727: </head>
728: <body bgcolor="#FFFFFF">
729:
730: Body of Document Goes Here
731:
732: </body>
733: </html>
734: SIMPLECONTENT
735: }
736: my $editheader='<a href="#editsection">Edit below</a><hr />';
737: my $editfooter=(<<ENDFOOTER);
738: <hr />
739: <a name="editsection" />
740: <form method="post">
741: <textarea cols="80" rows="40" name="filecont">$filecontents</textarea>
742: <br />
743: <input type="submit" name="savethisfile" value="Save this file" />
744: </form>
745: ENDFOOTER
746: $result=~s/(\<body[^\>]*\>)/$1$editheader/is;
747: $result=~s/(\<\/body\>)/$editfooter/is;
748: return $result;
749: }
750:
751: sub handler {
752: my $request=shift;
753:
754: my $target='web';
755:
756: $Apache::lonxml::debug=0;
757:
758: if ($ENV{'browser.mathml'}) {
759: $request->content_type('text/xml');
760: } else {
761: $request->content_type('text/html');
762: }
763:
764: $request->send_http_header;
765:
766: return OK if $request->header_only;
767:
768:
769: my $file=&Apache::lonnet::filelocation("",$request->uri);
770: #
771: # Edit action? Save file.
772: #
773: unless ($ENV{'request.state'} eq 'published') {
774: if ($ENV{'form.savethisfile'}) {
775: &storefile($file,$ENV{'form.filecont'});
776: }
777: }
778: my %mystyle;
779: my $result = '';
780: my $filecontents=&Apache::lonnet::getfile($file);
781: if ($filecontents == -1) {
782: $result=(<<ENDNOTFOUND);
783: <html>
784: <head>
785: <title>File not found</title>
786: </head>
787: <body bgcolor="#FFFFFF">
788: <b>File not found: $file</b>
789: </body>
790: </html>
791: ENDNOTFOUND
792: $filecontents='';
793: } else {
794: $result = &Apache::lonxml::xmlparse($target,$filecontents,'',%mystyle);
795: }
796:
797: #
798: # Edit action? Insert editing commands
799: #
800: unless ($ENV{'request.state'} eq 'published') {
801: $result=&inserteditinfo($result,$filecontents);
802: }
803:
804: $request->print($result);
805:
806: writeallows($request->uri);
807: return OK;
808: }
809:
810: sub debug {
811: if ($Apache::lonxml::debug eq 1) {
812: print "DEBUG:".$_[0]."<br />\n";
813: }
814: }
815:
816: sub error {
817: if (($Apache::lonxml::debug eq 1) || ($ENV{'request.state'} eq 'construct') ) {
818: print "<b>ERROR:</b>".$_[0]."<br />\n";
819: } else {
820: print "<b>An Error occured while processing this resource. The instructor has been notified.</b> <br />";
821: #notify author
822: &Apache::lonmsg::author_res_msg($ENV{'request.filename'},$_[0]);
823: #notify course
824: if ( $ENV{'request.course.id'} ) {
825: my $users=$ENV{'course.'.$ENV{'request.course.id'}.'.comment.email'};
826: foreach my $user (split /\,/, $users) {
827: ($user,my $domain) = split /:/, $user;
828: &Apache::lonmsg::user_normal_msg($user,$domain,"Error in $ENV{'request.filename'}",$_[0]);
829: }
830: }
831:
832: #FIXME probably shouldn't have me get everything forever.
833: &Apache::lonmsg::user_normal_msg('albertel','msu',"Error in $ENV{'request.filename'}",$_[0]);
834: #&Apache::lonmsg::user_normal_msg('albertel','103',"Error in $ENV{'request.filename'}",$_[0]);
835: }
836: }
837:
838: sub warning {
839: if ($ENV{'request.state'} eq 'construct') {
840: print "<b>W</b>ARNING<b>:</b>".$_[0]."<br />\n";
841: }
842: }
843:
844: sub get_param {
845: my ($param,$parstack,$safeeval,$context) = @_;
846: if ( ! $context ) { $context = -1; }
847: my $args ='';
848: if ( $#$parstack > (-2-$context) ) { $args=$$parstack[$context]; }
849: return &Apache::run::run("{$args;".'return $'.$param.'}',$safeeval); #'
850: }
851:
852: sub register_insert {
853: my @data = split /\n/, &Apache::lonnet::getfile('/home/httpd/lonTabs/insertlist.tab');
854: my $i;
855: my $tagnum=0;
856: my @order;
857: for ($i=0;$i < $#data; $i++) {
858: my $line = $data[$i];
859: if ( $line =~ /^\#/ || $line =~ /^\s*\n/) { next; }
860: if ( $line =~ /TABLE/ ) { last; }
861: my ($tag,$descrip,$color,$function,$show) = split(/,/, $line);
862: $insertlist{"$tagnum.tag"} = $tag;
863: $insertlist{"$tagnum.description"} = $descrip;
864: $insertlist{"$tagnum.color"} = $color;
865: $insertlist{"$tagnum.function"} = $function;
866: $insertlist{"$tagnum.show"}= $show;
867: $insertlist{"$tag.num"}=$tagnum;
868: $tagnum++;
869: }
870: $i++; #skipping TABLE line
871: $tagnum = 0;
872: for (;$i < $#data;$i++) {
873: my $line = $data[$i];
874: my ($mnemonic,@which) = split(/ +/,$line);
875: my $tag = $insertlist{"$tagnum.tag"};
876: for (my $j=0;$j <$#which;$j++) {
877: if ( $which[$j] eq 'Y' ) {
878: if ($insertlist{"$j.show"} ne 'no') {
879: push(@{ $insertlist{"$tag.which"} },$j);
880: }
881: }
882: }
883: $tagnum++;
884: }
885: }
886: 1;
887: __END__
888:
889:
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