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