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:
13: package Apache::lonxml;
14: use vars
15: qw(@pwd @outputstack $redirection $import @extlinks $metamode $evaluate %insertlist @namespace);
16: use strict;
17: use HTML::TokeParser;
18: use Safe;
19: use Safe::Hole;
20: use Math::Trig;
21: use Math::Cephes qw(j0 j1 jn jv y0 y1 yn yv);
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: }
111: }
112:
113: function LONCAPAstale() {
114: if (window.location.pathname!="/res/adm/pages/menu.html") {
115: menu=window.open("","LONCAPAmenu");
116: menu.currentStale=1;
117: }
118: }
119: // END LON-CAPA Internal
120: </script>
121: ENDSCRIPT
122: }
123:
124: sub loadevents() {
125: return 'LONCAPAreg();';
126: }
127:
128: sub unloadevents() {
129: return 'LONCAPAstale();';
130: }
131:
132: sub printalltags {
133: my $temp;
134: foreach $temp (sort keys %Apache::lonxml::alltags) {
135: &Apache::lonxml::debug("$temp -- $Apache::lonxml::alltags{$temp}");
136: }
137: }
138:
139: sub xmlparse {
140:
141: my ($target,$content_file_string,$safeinit,%style_for_target) = @_;
142: if ($target eq 'meta') {
143: $Apache::lonxml::redirection = 0;
144: $Apache::lonxml::metamode = 1;
145: $Apache::lonxml::evaluate = 1;
146: $Apache::lonxml::import = 0;
147: } elsif ($target eq 'grade') {
148: &startredirection;
149: $Apache::lonxml::metamode = 0;
150: $Apache::lonxml::evaluate = 1;
151: $Apache::lonxml::import = 1;
152: } elsif ($target eq 'modified') {
153: $Apache::lonxml::redirection = 0;
154: $Apache::lonxml::metamode = 0;
155: $Apache::lonxml::evaluate = 0;
156: $Apache::lonxml::import = 0;
157: } else {
158: $Apache::lonxml::redirection = 0;
159: $Apache::lonxml::metamode = 0;
160: $Apache::lonxml::evaluate = 1;
161: $Apache::lonxml::import = 1;
162: }
163: #&printalltags();
164: my @pars = ();
165: @Apache::lonxml::pwd=();
166: my $pwd=$ENV{'request.filename'};
167: $pwd =~ s:/[^/]*$::;
168: &newparser(\@pars,\$content_file_string,$pwd);
169: my $currentstring = '';
170: my $finaloutput = '';
171: my $newarg = '';
172: my $result;
173:
174: my $safeeval = new Safe;
175: my $safehole = new Safe::Hole;
176: $safeeval->permit("entereval");
177: $safeeval->permit(":base_math");
178: $safeeval->permit("sort");
179: $safeeval->deny(":base_io");
180: # $safe->share_from('Math::Trig',['acsc','asin','acos','atan']);
181: $safehole->wrap(\&Apache::lonnet::EXT,$safeeval,'&EXT');
182: $safehole->wrap(\&Math::Trig::acsc,$safeeval,'&acsc');
183: $safehole->wrap(\&Math::Trig::acosec,$safeeval,'&acosec');
184: $safehole->wrap(\&Math::Trig::asec,$safeeval,'&asec');
185: $safehole->wrap(\&Math::Trig::acot,$safeeval,'&acot');
186: $safehole->wrap(\&Math::Trig::acotan,$safeeval,'&acotan');
187: $safehole->wrap(\&Math::Trig::acsch,$safeeval,'&acsch');
188: $safehole->wrap(\&Math::Trig::acosech,$safeeval,'&acosech');
189: $safehole->wrap(\&Math::Trig::asech,$safeeval,'&asech');
190: $safehole->wrap(\&Math::Trig::acoth,$safeeval,'&acoth');
191: $safehole->wrap(\&Math::Trig::acotanh,$safeeval,'&acotanh');
192: $safehole->wrap(\&Math::Trig::asin,$safeeval,'&asin');
193: $safehole->wrap(\&Math::Trig::acos,$safeeval,'&acos');
194: $safehole->wrap(\&Math::Trig::atan,$safeeval,'&atan');
195: $safehole->wrap(\&Math::Trig::asinh,$safeeval,'&asinh');
196: $safehole->wrap(\&Math::Trig::acosh,$safeeval,'&acosh');
197: $safehole->wrap(\&Math::Trig::atanh,$safeeval,'&atanh');
198: $safehole->wrap(\&Math::Trig::atan2,$safeeval,'&atan2');
199: $safehole->wrap(\&Math::Trig::csc,$safeeval,'&csc');
200: $safehole->wrap(\&Math::Trig::cosec,$safeeval,'&cosec');
201: $safehole->wrap(\&Math::Trig::sec,$safeeval,'&sec');
202: $safehole->wrap(\&Math::Trig::cot,$safeeval,'&cot');
203: $safehole->wrap(\&Math::Trig::cotan,$safeeval,'&cotan');
204: $safehole->wrap(\&Math::Trig::csch,$safeeval,'&csch');
205: $safehole->wrap(\&Math::Trig::cosech,$safeeval,'&cosech');
206: $safehole->wrap(\&Math::Trig::sech,$safeeval,'&sech');
207: $safehole->wrap(\&Math::Trig::coth,$safeeval,'&coth');
208: $safehole->wrap(\&Math::Trig::cotanh,$safeeval,'&cptanh');
209: $safehole->wrap(\&Math::Trig::deg2rad,$safeeval,'°2rad');
210: $safehole->wrap(\&Math::Trig::deg2grad,$safeeval,'°2grad');
211: $safehole->wrap(\&Math::Trig::grad2deg,$safeeval,'&grad2deg');
212: $safehole->wrap(\&Math::Trig::grad2rad,$safeeval,'&grad2rad');
213: $safehole->wrap(\&Math::Trig::rad2deg,$safeeval,'&rad2deg');
214: $safehole->wrap(\&Math::Trig::rad2grad,$safeeval,'&rad2grad');
215: $safehole->wrap(\&Math::Trig::pi,$safeeval,'&pi');
216: $safehole->wrap(\&Math::Cephes::erf,$safeeval,'&erf');
217: $safehole->wrap(\&Math::Cephes::erfc,$safeeval,'&erfc');
218: $safehole->wrap(\&Math::Cephes::j0,$safeeval,'&j0');
219: $safehole->wrap(\&Math::Cephes::j1,$safeeval,'&j1');
220: $safehole->wrap(\&Math::Cephes::jn,$safeeval,'&jn');
221: $safehole->wrap(\&Math::Cephes::jv,$safeeval,'&jv');
222: $safehole->wrap(\&Math::Cephes::y0,$safeeval,'&y0');
223: $safehole->wrap(\&Math::Cephes::y1,$safeeval,'&y1');
224: $safehole->wrap(\&Math::Cephes::yn,$safeeval,'&yn');
225: $safehole->wrap(\&Math::Cephes::yv,$safeeval,'&yv');
226:
227: #need to inspect this class of ops
228: # $safeeval->deny(":base_orig");
229: $safeinit .= ';$external::target='.$target.';';
230: $safeinit .= ';$external::randomseed='.&Apache::lonnet::rndseed().';';
231: &Apache::run::run($safeinit,$safeeval);
232: #-------------------- Redefinition of the target in the case of compound target
233:
234: ($target, my @tenta) = split('&&',$target);
235:
236: my @stack = ();
237: my @parstack = ();
238: &initdepth;
239: my $token;
240: while ( $#pars > -1 ) {
241: while ($token = $pars[$#pars]->get_token) {
242: if (($token->[0] eq 'T') || ($token->[0] eq 'C') || ($token->[0] eq 'D') ) {
243: if ($metamode<1) { $result=$token->[1]; }
244: } elsif ($token->[0] eq 'PI') {
245: if ($metamode<1) { $result=$token->[2]; }
246: } elsif ($token->[0] eq 'S') {
247: # add tag to stack
248: push (@stack,$token->[1]);
249: # add parameters list to another stack
250: push (@parstack,&parstring($token));
251: &increasedepth($token);
252: if (exists $style_for_target{$token->[1]}) {
253: if ($Apache::lonxml::redirection) {
254: $Apache::lonxml::outputstack['-1'] .=
255: &recurse($style_for_target{$token->[1]},$target,$safeeval,
256: \%style_for_target,@parstack);
257: } else {
258: $finaloutput .= &recurse($style_for_target{$token->[1]},$target,
259: $safeeval,\%style_for_target,@parstack);
260: }
261: } else {
262: $result = &callsub("start_$token->[1]", $target, $token,\@parstack,
263: \@pars, $safeeval, \%style_for_target);
264: }
265: } elsif ($token->[0] eq 'E') {
266: #clear out any tags that didn't end
267: while ($token->[1] ne $stack[$#stack] && ($#stack > -1)) {
268: &Apache::lonxml::warning("Unbalanced tags in resource $stack['-1']");
269: pop @stack;pop @parstack;&decreasedepth($token);
270: }
271:
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]"},
276: $target,$safeeval,\%style_for_target,@parstack);
277: } else {
278: $finaloutput .= &recurse($style_for_target{'/'."$token->[1]"},
279: $target,$safeeval,\%style_for_target,
280: @parstack);
281: }
282:
283: } else {
284: $result = &callsub("end_$token->[1]", $target, $token, \@parstack,
285: \@pars,$safeeval, \%style_for_target);
286: }
287: } else {
288: &Apache::lonxml::error("Unknown token event :$token->[0]:$token->[1]:");
289: }
290: #evaluate variable refs in result
291: if ($result ne "") {
292: if ( $#parstack > -1 ) {
293: if ($Apache::lonxml::redirection) {
294: $Apache::lonxml::outputstack['-1'] .=
295: &Apache::run::evaluate($result,$safeeval,$parstack[$#parstack]);
296: } else {
297: $finaloutput .= &Apache::run::evaluate($result,$safeeval,
298: $parstack[$#parstack]);
299: }
300: } else {
301: $finaloutput .= &Apache::run::evaluate($result,$safeeval,'');
302: }
303: $result = '';
304: }
305: if ($token->[0] eq 'E') {
306: pop @stack;pop @parstack;&decreasedepth($token);
307: }
308: }
309: pop @pars;
310: pop @Apache::lonxml::pwd;
311: }
312:
313: # if ($target eq 'meta') {
314: # $finaloutput.=&endredirection;
315: # }
316:
317: if (($ENV{'QUERY_STRING'}) && ($target eq 'web')) {
318: $finaloutput=&afterburn($finaloutput);
319: }
320:
321: return $finaloutput;
322: }
323:
324:
325: sub recurse {
326:
327: my @innerstack = ();
328: my @innerparstack = ();
329: my ($newarg,$target,$safeeval,$style_for_target,@parstack) = @_;
330: my @pat = ();
331: &newparser(\@pat,\$newarg);
332: my $tokenpat;
333: my $partstring = '';
334: my $output='';
335: my $decls='';
336: while ( $#pat > -1 ) {
337: while ($tokenpat = $pat[$#pat]->get_token) {
338: if (($tokenpat->[0] eq 'T') || ($tokenpat->[0] eq 'C') || ($tokenpat->[0] eq 'D') ) {
339: if ($metamode<1) { $partstring=$tokenpat->[1]; }
340: } elsif ($tokenpat->[0] eq 'PI') {
341: if ($metamode<1) { $partstring=$tokenpat->[2]; }
342: } elsif ($tokenpat->[0] eq 'S') {
343: push (@innerstack,$tokenpat->[1]);
344: push (@innerparstack,&parstring($tokenpat));
345: &increasedepth($tokenpat);
346: $partstring = &callsub("start_$tokenpat->[1]",
347: $target, $tokenpat, \@innerparstack,
348: \@pat, $safeeval, $style_for_target);
349: } elsif ($tokenpat->[0] eq 'E') {
350: #clear out any tags that didn't end
351: while ($tokenpat->[1] ne $innerstack[$#innerstack]
352: && ($#innerstack > -1)) {
353: &Apache::lonxml::warning("Unbalanced tags in resource $innerstack['-1']");
354: pop @innerstack;pop @innerparstack;&decreasedepth($tokenpat);
355: }
356: $partstring = &callsub("end_$tokenpat->[1]",
357: $target, $tokenpat, \@innerparstack,
358: \@pat, $safeeval, $style_for_target);
359: } else {
360: &Apache::lonxml::error("Unknown token event :$tokenpat->[0]:$tokenpat->[1]:");
361: }
362: #pass both the variable to the style tag, and the tag we
363: #are processing inside the <definedtag>
364: if ( $partstring ne "" ) {
365: if ( $#parstack > -1 ) {
366: if ( $#innerparstack > -1 ) {
367: $decls= $parstack[$#parstack].$innerparstack[$#innerparstack];
368: } else {
369: $decls= $parstack[$#parstack];
370: }
371: } else {
372: if ( $#innerparstack > -1 ) {
373: $decls=$innerparstack[$#innerparstack];
374: } else {
375: $decls='';
376: }
377: }
378: $output .= &Apache::run::evaluate($partstring,$safeeval,$decls);
379: $partstring = '';
380: }
381: if ($tokenpat->[0] eq 'E') { pop @innerstack;pop @innerparstack;
382: &decreasedepth($tokenpat);}
383: }
384: pop @pat;
385: pop @Apache::lonxml::pwd;
386: }
387: return $output;
388: }
389:
390: sub callsub {
391: my ($sub,$target,$token,$parstack,$parser,$safeeval,$style)=@_;
392: my $currentstring='';
393: my $nodefault;
394: {
395: my $sub1;
396: no strict 'refs';
397: if ($target eq 'edit' && $token->[0] eq 'S') {
398: $currentstring = &Apache::edit::tag_start($target,$token,$parstack,$parser,
399: $safeeval,$style);
400: }
401: my $tag=$token->[1];
402: my $space=$Apache::lonxml::alltags{$tag};
403: if (!$space) {
404: $tag=~tr/A-Z/a-z/;
405: $sub=~tr/A-Z/a-z/;
406: $space=$Apache::lonxml::alltags{$tag}
407: }
408: if ($space) {
409: #&Apache::lonxml::debug("Calling sub $sub in $space $metamode<br />\n");
410: $sub1="$space\:\:$sub";
411: $Apache::lonxml::curdepth=join('_',@Apache::lonxml::depthcounter);
412: ($currentstring,$nodefault) = &$sub1($target,$token,$parstack,$parser,
413: $safeeval,$style);
414: } else {
415: #&Apache::lonxml::debug("NOT Calling sub $sub in $space $metamode<br />\n");
416: if ($metamode <1) {
417: if (defined($token->[4]) && ($metamode < 1)) {
418: $currentstring = $token->[4];
419: } else {
420: $currentstring = $token->[2];
421: }
422: }
423: }
424: &Apache::lonxml::debug("nodefalt:$nodefault:");
425: if ($currentstring eq '' && $nodefault eq '') {
426: if ($target eq 'edit') {
427: &Apache::lonxml::debug("doing default edit for $token->[1]");
428: if ($token->[0] eq 'S') {
429: $currentstring = &Apache::edit::tag_start($target,$token);
430: } elsif ($token->[0] eq 'E') {
431: $currentstring = &Apache::edit::tag_end($target,$token);
432: }
433: } elsif ($target eq 'modified') {
434: if ($token->[0] eq 'S') {
435: $currentstring = $token->[4];
436: $currentstring.=&Apache::edit::handle_insert();
437: } else {
438: $currentstring = $token->[2];
439: }
440: }
441: }
442: use strict 'refs';
443: }
444: return $currentstring;
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 register_insert {
761: my @data = split /\n/, &Apache::lonnet::getfile('/home/httpd/lonTabs/insertlist.tab');
762: my $i;
763: my $tagnum=0;
764: my @order;
765: for ($i=0;$i < $#data; $i++) {
766: my $line = $data[$i];
767: if ( $line =~ /^\#/ || $line =~ /^\s*\n/) { next; }
768: if ( $line =~ /TABLE/ ) { last; }
769: my ($tag,$descrip,$function,$show) = split(/,/, $line);
770: $insertlist{"$tagnum.tag"} = $tag;
771: $insertlist{"$tagnum.description"} = $descrip;
772: $insertlist{"$tagnum.function"} = $function;
773: $insertlist{"$tagnum.show"}= $show;
774: $tagnum++;
775: }
776: $i++; #skipping TABLE line
777: $tagnum = 0;
778: for (;$i < $#data;$i++) {
779: my $line = $data[$i];
780: my ($mnemonic,@which) = split(/ +/,$line);
781: my $tag = $insertlist{"$tagnum.tag"};
782: for (my $j=0;$j <$#which;$j++) {
783: if ( $which[$j] eq 'Y' ) {
784: if ($insertlist{"$j.show"} ne 'no') {
785: push(@{ $insertlist{"$tag.which"} },$j);
786: }
787: }
788: }
789: $tagnum++;
790: }
791: }
792: 1;
793: __END__
794:
795:
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