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