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