Annotation of loncom/xml/lonxml.pm, revision 1.112
1.2 sakharuk 1: # The LearningOnline Network with CAPA
1.3 sakharuk 2: # XML Parser Module
1.2 sakharuk 3: #
1.3 sakharuk 4: # last modified 06/26/00 by Alexander Sakharuk
1.33 www 5: # 11/6 Gerd Kortemeyer
1.45 www 6: # 6/1/1 Gerd Kortemeyer
1.56 albertel 7: # 2/21,3/13 Guy
1.68 www 8: # 3/29,5/4 Gerd Kortemeyer
1.73 harris41 9: # 5/10 Scott Harrison
1.78 www 10: # 5/26 Gerd Kortemeyer
1.80 harris41 11: # 5/27 H. K. Ng
1.89 www 12: # 6/2,6/3,6/8,6/9 Gerd Kortemeyer
1.93 ng 13: # 6/12,6/13 H. K. Ng
1.95 www 14: # 6/16 Gerd Kortemeyer
1.104 ng 15: # 7/27 H. K. Ng
1.112 ! www 16: # 8/7,8/9,8/10,8/11,8/15 Gerd Kortemeyer
1.2 sakharuk 17:
1.4 albertel 18: package Apache::lonxml;
1.33 www 19: use vars
1.76 albertel 20: qw(@pwd @outputstack $redirection $import @extlinks $metamode $evaluate %insertlist @namespace);
1.1 sakharuk 21: use strict;
22: use HTML::TokeParser;
1.106 www 23: use HTML::TreeBuilder;
1.3 sakharuk 24: use Safe;
1.40 albertel 25: use Safe::Hole;
1.81 ng 26: use Math::Cephes qw(:trigs :hypers :bessels erf erfc);
1.91 ng 27: use Math::Random qw(:all);
1.13 albertel 28: use Opcode;
1.72 albertel 29:
30: sub register {
31: my $space;
32: my @taglist;
33: my $temptag;
34: ($space,@taglist) = @_;
35: foreach $temptag (@taglist) {
36: $Apache::lonxml::alltags{$temptag}=$space;
37: }
38: }
39:
1.46 www 40: use Apache::Constants qw(:common);
1.71 www 41: use Apache::lontexconvert;
1.72 albertel 42: use Apache::style;
43: use Apache::run;
44: use Apache::londefdef;
45: use Apache::scripttag;
46: use Apache::edit;
1.79 www 47: use Apache::lonnet;
48: use Apache::File;
49:
1.72 albertel 50: #================================================== Main subroutine: xmlparse
51: #debugging control, to turn on debugging modify the correct handler
52: $Apache::lonxml::debug=0;
53:
54: #path to the directory containing the file currently being processed
55: @pwd=();
56:
57: #these two are used for capturing a subset of the output for later processing,
58: #don't touch them directly use &startredirection and &endredirection
59: @outputstack = ();
60: $redirection = 0;
61:
62: #controls wheter the <import> tag actually does
63: $import = 1;
64: @extlinks=();
65:
66: # meta mode is a bit weird only some output is to be turned off
67: #<output> tag turns metamode off (defined in londefdef.pm)
68: $metamode = 0;
69:
70: # turns on and of run::evaluate actually derefencing var refs
71: $evaluate = 1;
1.7 albertel 72:
1.74 albertel 73: # data structure for eidt mode, determines what tags can go into what other tags
74: %insertlist=();
1.68 www 75:
1.99 albertel 76: # stores the list of active tag namespaces
1.76 albertel 77: @namespace=();
78:
1.99 albertel 79: # has the dynamic menu been updated to know about this resource
80: $Apache::lonxml::registered=0;
81:
1.68 www 82: sub xmlbegin {
83: my $output='';
84: if ($ENV{'browser.mathml'}) {
85: $output='<?xml version="1.0"?>'
86: .'<?xml-stylesheet type="text/css" href="/adm/MathML/mathml.css"?>'
87: .'<!DOCTYPE html SYSTEM "/adm/MathML/mathml.dtd" '
88: .'[<!ENTITY mathns "http://www.w3.org/1998/Math/MathML">]>'
89: .'<html xmlns:math="http://www.w3.org/1998/Math/MathML" '
90: .'xmlns="http://www.w3.org/TR/REC-html40">';
91: } else {
92: $output='<html>';
93: }
94: return $output;
95: }
96:
97: sub xmlend {
1.103 www 98: my $discussion='';
99: if ($ENV{'request.course.id'}) {
1.109 www 100: my $crs='/'.$ENV{'request.course.id'};
101: if ($ENV{'request.course.sec'}) {
102: $crs.='_'.$ENV{'request.course.sec'};
103: }
104: $crs=~s/\_/\//g;
105: my $seeid=&Apache::lonnet::allowed('rin',$crs);
1.103 www 106: my $symb=&Apache::lonnet::symbread();
107: if ($symb) {
108: my %contrib=&Apache::lonnet::restore($symb,$ENV{'request.course.id'},
109: $ENV{'course.'.$ENV{'request.course.id'}.'.domain'},
110: $ENV{'course.'.$ENV{'request.course.id'}.'.num'});
111: if ($contrib{'version'}) {
112: $discussion.=
113: '<address><hr /><h2>Course Discussion of Resource</h2>';
114: my $idx;
115: for ($idx=1;$idx<=$contrib{'version'};$idx++) {
1.110 www 116: my $hidden=($contrib{'hidden'}=~/\.$idx\./);
117: unless (($hidden) && (!$seeid)) {
118: my $message=$contrib{$idx.':message'};
119: $message=~s/\n/\<br \/\>/g;
120: if ($message) {
121: if ($hidden) {
122: $message='<font color="#888888">'.$message.'</font>';
123: }
1.109 www 124: my $sender='Anonymous';
125: if ((!$contrib{$idx.':anonymous'}) || ($seeid)) {
126: $sender=$contrib{$idx.':sendername'}.' at '.
127: $contrib{$idx.':senderdomain'};
128: if ($contrib{$idx.':anonymous'}) {
129: $sender.=' (anonymous)';
1.110 www 130: }
131: if ($seeid) {
132: if ($hidden) {
133: $sender.=' <a href="/adm/feedback?unhide='.
134: $symb.':::'.$idx.'">Make Visible</a>';
135: } else {
136: $sender.=' <a href="/adm/feedback?hide='.
137: $symb.':::'.$idx.'">Hide</a>';
138: }
1.109 www 139: }
140: }
141: $discussion.='<p><b>'.$sender.'</b> ('.
1.103 www 142: localtime($contrib{$idx.':timestamp'}).
143: '):<blockquote>'.$message.
1.110 www 144: '</blockquote></p>';
145: }
146: }
1.103 www 147: }
148: $discussion.='</address>';
149: }
150: }
151: }
152: return $discussion.'</html>';
1.112 ! www 153: }
! 154:
! 155: sub checkout {
! 156: my ($target,$symb,$tuname,$tudom,$tcrsid)=@_;
! 157: unless ($symb) {
! 158: $symb=&Apache::lonnet::symbread();
! 159: }
! 160: unless ($tuname) {
! 161: $tuname=$ENV{'user.name'};
! 162: $tudom=$ENV{'user.domain'};
! 163: $tcrsid=$ENV{'request.course.id'};
! 164: }
! 165: my $lonhost = $Apache::lonnet::perlvar{'lonHostID'};
! 166: my $infostr=&Apache::lonnet::escape(
! 167: $tuname.'&'.
! 168: $tudom.'&'.
! 169: $tcrsid.'&'.
! 170: $symb.'&'.
! 171: time.'&'.$ENV{'REMOTE_ADDR'});
! 172: my $token=Apache::lonnet::reply('tmpput:'.$infostr,$lonhost);
! 173: if ($token=~/^error\:/) { return ''; }
! 174: $token=~s/^(\d+)\_.*\_(\d+)$/$1\_$2\_$lonhost/;
! 175: if (&Apache::lonnet::log($tudom,$tuname,
! 176: &Apache::lonnet::homeserver($tuname,$tudom),
! 177: &Apache::lonnet::escape('Checkout '.$infostr.' - '.
! 178: $token)) ne 'ok') {
! 179: return '';
! 180: }
! 181: if ($target eq 'web') {
! 182: return '<img src="/cgi-bin/barcode.gif?encode='.$token.'" />';
! 183: } else {
! 184: return $token;
! 185: }
1.68 www 186: }
187:
1.70 www 188: sub fontsettings() {
189: my $headerstring='';
190: if (($ENV{'browser.os'} eq 'mac') && (!$ENV{'browser.mathml'})) {
191: $headerstring.=
192: '<meta Content-Type="text/html; charset=x-mac-roman">';
193: }
194: return $headerstring;
195: }
196:
1.68 www 197: sub registerurl {
1.100 www 198: my $forcereg=shift;
1.99 albertel 199: if ($Apache::lonxml::registered) { return ''; }
1.105 albertel 200: $Apache::lonxml::registered=1;
1.100 www 201: if (($ENV{'REQUEST_URI'}!~/^\/(res\/)*adm\//) || ($forcereg)) {
1.87 www 202: my $hwkadd='';
203: if ($ENV{'REQUEST_URI'}=~/\.(problem|exam|quiz|assess|survey|form)$/) {
204: if (&Apache::lonnet::allowed('vgr',$ENV{'request.course.id'})) {
205: $hwkadd.=(<<ENDSUBM);
206: menu.switchbutton
207: (7,1,'subm.gif','view sub','missions',
1.88 www 208: 'gocmd("/adm/grades","submission")');
1.87 www 209: ENDSUBM
210: }
211: if (&Apache::lonnet::allowed('mgr',$ENV{'request.course.id'})) {
212: $hwkadd.=(<<ENDGRDS);
213: menu.switchbutton
214: (7,2,'pgrd.gif','problem','grades',
1.88 www 215: 'gocmd("/adm/grades","viewgrades")');
1.87 www 216: ENDGRDS
217: }
218: if (&Apache::lonnet::allowed('opa',$ENV{'request.course.id'})) {
219: $hwkadd.=(<<ENDPARM);
220: menu.switchbutton
221: (7,3,'pparm.gif','problem','parms',
1.88 www 222: 'gocmd("/adm/parmset","set")');
1.87 www 223: ENDPARM
224: }
225: }
1.86 www 226: return (<<ENDREGTHIS);
1.87 www 227:
1.68 www 228: <script language="JavaScript">
1.71 www 229: // BEGIN LON-CAPA Internal
1.86 www 230:
1.69 www 231: function LONCAPAreg() {
232: menu=window.open("","LONCAPAmenu");
1.86 www 233: menu.clearTimeout(menu.menucltim);
1.69 www 234: menu.currentURL=window.location.pathname;
235: menu.currentStale=0;
1.85 www 236: menu.clearbut(3,1);
237: menu.switchbutton
1.108 www 238: (6,3,'catalog.gif','catalog','info','catalog_info()');
239: menu.switchbutton
1.85 www 240: (8,1,'eval.gif','evaluate','this','gopost("/adm/evaluate",currentURL)');
241: menu.switchbutton
242: (8,2,'fdbk.gif','feedback','on this','gopost("/adm/feedback",currentURL)');
243: menu.switchbutton
244: (8,3,'prt.gif','prepare','printout','gopost("/adm/printout",currentURL)');
245: menu.switchbutton
246: (2,1,'back.gif','backward','','gopost("/adm/flip","back:"+currentURL)');
247: menu.switchbutton
248: (2,3,'forw.gif','forward','','gopost("/adm/flip","forward:"+currentURL)');
1.94 www 249: menu.switchbutton
250: (9,1,'sbkm.gif','set','bookmark','set_bookmark()');
251: menu.switchbutton
252: (9,2,'vbkm.gif','view','bookmark','edit_bookmarks()');
253: menu.switchbutton
1.95 www 254: (9,3,'anot.gif','anno-','tations','annotate()');
1.87 www 255: $hwkadd
1.69 www 256: }
1.86 www 257:
1.69 www 258: function LONCAPAstale() {
1.86 www 259: menu=window.open("","LONCAPAmenu");
260: menu.currentStale=1;
261: menu.switchbutton
262: (3,1,'reload.gif','return','location','go(currentURL)');
1.90 www 263: menu.clearbut(7,1);
264: menu.clearbut(7,2);
265: menu.clearbut(7,3);
1.86 www 266: menu.menucltim=menu.setTimeout(
1.94 www 267: 'clearbut(2,1);clearbut(2,3);clearbut(8,1);clearbut(8,2);clearbut(8,3);'+
1.108 www 268: 'clearbut(9,1);clearbut(9,2);clearbut(9,3);clearbut(6,3)',
1.86 www 269: 2000);
270:
1.87 www 271: }
1.86 www 272:
273: // END LON-CAPA Internal
274: </script>
275: ENDREGTHIS
276:
277: } else {
278: return (<<ENDDONOTREGTHIS);
279:
280: <script language="JavaScript">
281: // BEGIN LON-CAPA Internal
282:
283: function LONCAPAreg() {
1.69 www 284: menu=window.open("","LONCAPAmenu");
285: menu.currentStale=1;
1.85 www 286: menu.clearbut(2,1);
287: menu.clearbut(2,3);
288: menu.clearbut(8,1);
289: menu.clearbut(8,2);
290: menu.clearbut(8,3);
1.86 www 291: if (menu.currentURL) {
292: menu.switchbutton
293: (3,1,'reload.gif','return','location','go(currentURL)');
294: } else {
295: menu.clearbut(3,1);
296: }
297: }
298:
299: function LONCAPAstale() {
1.68 www 300: }
1.86 www 301:
1.71 www 302: // END LON-CAPA Internal
1.68 www 303: </script>
1.86 www 304: ENDDONOTREGTHIS
305:
306: }
1.69 www 307: }
308:
309: sub loadevents() {
310: return 'LONCAPAreg();';
311: }
312:
313: sub unloadevents() {
314: return 'LONCAPAstale();';
1.68 www 315: }
316:
1.48 albertel 317: sub printalltags {
318: my $temp;
319: foreach $temp (sort keys %Apache::lonxml::alltags) {
1.64 albertel 320: &Apache::lonxml::debug("$temp -- $Apache::lonxml::alltags{$temp}");
1.48 albertel 321: }
322: }
1.31 sakharuk 323:
1.3 sakharuk 324: sub xmlparse {
1.18 albertel 325: my ($target,$content_file_string,$safeinit,%style_for_target) = @_;
1.96 albertel 326:
327: &setup_globals($target);
1.48 albertel 328: #&printalltags();
1.16 albertel 329: my @pars = ();
1.23 albertel 330: my $pwd=$ENV{'request.filename'};
331: $pwd =~ s:/[^/]*$::;
332: &newparser(\@pars,\$content_file_string,$pwd);
1.24 sakharuk 333:
1.3 sakharuk 334: my $safeeval = new Safe;
1.40 albertel 335: my $safehole = new Safe::Hole;
1.82 ng 336: &init_safespace($target,$safeeval,$safehole,$safeinit);
1.3 sakharuk 337: #-------------------- Redefinition of the target in the case of compound target
338:
339: ($target, my @tenta) = split('&&',$target);
340:
341: my @stack = ();
342: my @parstack = ();
1.17 albertel 343: &initdepth;
1.67 www 344:
1.101 albertel 345: my $finaloutput = &inner_xmlparse($target,\@stack,\@parstack,\@pars,
346: $safeeval,\%style_for_target);
1.67 www 347:
1.3 sakharuk 348: return $finaloutput;
1.106 www 349: }
350:
351: sub htmlclean {
1.107 www 352: my ($raw,$full)=@_;
1.106 www 353:
354: my $tree = HTML::TreeBuilder->new;
355: $tree->ignore_unknown(0);
356:
357: $tree->parse($raw);
358:
1.107 www 359: my $output= $tree->as_HTML(undef,' ');
1.106 www 360:
1.111 www 361: $output=~s/\<(br|hr|img|meta|allow)([^\>\/]*)\>/\<$1$2 \/\>/gis;
362: $output=~s/\<\/(br|hr|img|meta|allow)\>//gis;
1.107 www 363: unless ($full) {
364: $output=~s/\<[\/]*(body|head|html)\>//gis;
365: }
1.106 www 366:
367: $tree = $tree->delete;
368:
369: return $output;
1.15 albertel 370: }
371:
1.101 albertel 372: sub inner_xmlparse {
373: my ($target,$stack,$parstack,$pars,$safeeval,$style_for_target)=@_;
374: &Apache::lonxml::debug('Reentrant parser starting, again?');
375: my $finaloutput = '';
376: my $result;
377: my $token;
378: while ( $#$pars > -1 ) {
379: while ($token = $$pars['-1']->get_token) {
380: if (($token->[0] eq 'T') || ($token->[0] eq 'C') || ($token->[0] eq 'D') ) {
381: if ($metamode<1) {
382: $result=$token->[1];
383: }
384: } elsif ($token->[0] eq 'PI') {
385: if ($metamode<1) {
386: $result=$token->[2];
387: }
388: } elsif ($token->[0] eq 'S') {
389: # add tag to stack
390: push (@$stack,$token->[1]);
391: # add parameters list to another stack
392: push (@$parstack,&parstring($token));
393: &increasedepth($token);
394: if (exists $$style_for_target{$token->[1]}) {
395: if ($Apache::lonxml::redirection) {
396: $Apache::lonxml::outputstack['-1'] .=
397: &recurse($$style_for_target{$token->[1]},$target,$safeeval,
398: $style_for_target,@$parstack);
399: } else {
400: $finaloutput .= &recurse($$style_for_target{$token->[1]},$target,
401: $safeeval,$style_for_target,@$parstack);
402: }
403: } else {
404: $result = &callsub("start_$token->[1]", $target, $token, $stack,
405: $parstack, $pars, $safeeval, $style_for_target);
406: }
407: } elsif ($token->[0] eq 'E') {
408: #clear out any tags that didn't end
409: while ($token->[1] ne $$stack['-1'] && ($#$stack > -1)) {
410: &Apache::lonxml::warning("Unbalanced tags in resource $$stack['-1']");
411: &end_tag($stack,$parstack,$token);
412: }
413:
414: if (exists $$style_for_target{'/'."$token->[1]"}) {
415: if ($Apache::lonxml::redirection) {
416: $Apache::lonxml::outputstack['-1'] .=
417: &recurse($$style_for_target{'/'."$token->[1]"},
418: $target,$safeeval,$style_for_target,@$parstack);
419: } else {
420: $finaloutput .= &recurse($$style_for_target{'/'."$token->[1]"},
421: $target,$safeeval,$style_for_target,
422: @$parstack);
423: }
424:
425: } else {
426: $result = &callsub("end_$token->[1]", $target, $token, $stack,
427: $parstack, $pars,$safeeval, $style_for_target);
428: }
429: } else {
430: &Apache::lonxml::error("Unknown token event :$token->[0]:$token->[1]:");
431: }
432: #evaluate variable refs in result
433: if ($result ne "") {
434: if ( $#$parstack > -1 ) {
435: if ($Apache::lonxml::redirection) {
436: $Apache::lonxml::outputstack['-1'] .=
437: &Apache::run::evaluate($result,$safeeval,$$parstack['-1']);
438: } else {
439: $finaloutput .= &Apache::run::evaluate($result,$safeeval,
440: $$parstack['-1']);
441: }
442: } else {
443: $finaloutput .= &Apache::run::evaluate($result,$safeeval,'');
444: }
445: $result = '';
446: }
447: if ($token->[0] eq 'E') {
448: &end_tag($stack,$parstack,$token);
449: }
450: }
451: pop @$pars;
452: pop @Apache::lonxml::pwd;
453: }
454:
455: # if ($target eq 'meta') {
456: # $finaloutput.=&endredirection;
457: # }
458:
459: if (($ENV{'QUERY_STRING'}) && ($target eq 'web')) {
460: $finaloutput=&afterburn($finaloutput);
461: }
462: return $finaloutput;
463: }
1.67 www 464:
1.15 albertel 465: sub recurse {
466: my @innerstack = ();
467: my @innerparstack = ();
468: my ($newarg,$target,$safeeval,$style_for_target,@parstack) = @_;
1.16 albertel 469: my @pat = ();
1.23 albertel 470: &newparser(\@pat,\$newarg);
1.15 albertel 471: my $tokenpat;
472: my $partstring = '';
473: my $output='';
1.16 albertel 474: my $decls='';
475: while ( $#pat > -1 ) {
476: while ($tokenpat = $pat[$#pat]->get_token) {
1.57 albertel 477: if (($tokenpat->[0] eq 'T') || ($tokenpat->[0] eq 'C') || ($tokenpat->[0] eq 'D') ) {
1.61 albertel 478: if ($metamode<1) { $partstring=$tokenpat->[1]; }
1.57 albertel 479: } elsif ($tokenpat->[0] eq 'PI') {
1.61 albertel 480: if ($metamode<1) { $partstring=$tokenpat->[2]; }
1.16 albertel 481: } elsif ($tokenpat->[0] eq 'S') {
482: push (@innerstack,$tokenpat->[1]);
483: push (@innerparstack,&parstring($tokenpat));
1.19 albertel 484: &increasedepth($tokenpat);
1.84 albertel 485: $partstring = &callsub("start_$tokenpat->[1]", $target, $tokenpat,
486: \@innerstack, \@innerparstack, \@pat,
487: $safeeval, $style_for_target);
1.16 albertel 488: } elsif ($tokenpat->[0] eq 'E') {
489: #clear out any tags that didn't end
490: while ($tokenpat->[1] ne $innerstack[$#innerstack]
1.43 albertel 491: && ($#innerstack > -1)) {
1.49 albertel 492: &Apache::lonxml::warning("Unbalanced tags in resource $innerstack['-1']");
1.97 albertel 493: &end_tag(\@innerstack,\@innerparstack,$tokenpat);
1.43 albertel 494: }
1.84 albertel 495: $partstring = &callsub("end_$tokenpat->[1]", $target, $tokenpat,
496: \@innerstack, \@innerparstack, \@pat,
497: $safeeval, $style_for_target);
1.57 albertel 498: } else {
499: &Apache::lonxml::error("Unknown token event :$tokenpat->[0]:$tokenpat->[1]:");
1.16 albertel 500: }
501: #pass both the variable to the style tag, and the tag we
502: #are processing inside the <definedtag>
503: if ( $partstring ne "" ) {
504: if ( $#parstack > -1 ) {
505: if ( $#innerparstack > -1 ) {
506: $decls= $parstack[$#parstack].$innerparstack[$#innerparstack];
507: } else {
508: $decls= $parstack[$#parstack];
509: }
510: } else {
511: if ( $#innerparstack > -1 ) {
512: $decls=$innerparstack[$#innerparstack];
513: } else {
514: $decls='';
515: }
516: }
517: $output .= &Apache::run::evaluate($partstring,$safeeval,$decls);
518: $partstring = '';
519: }
1.17 albertel 520: if ($tokenpat->[0] eq 'E') { pop @innerstack;pop @innerparstack;
1.19 albertel 521: &decreasedepth($tokenpat);}
1.15 albertel 522: }
1.16 albertel 523: pop @pat;
1.23 albertel 524: pop @Apache::lonxml::pwd;
1.15 albertel 525: }
526: return $output;
1.7 albertel 527: }
528:
529: sub callsub {
1.84 albertel 530: my ($sub,$target,$token,$tagstack,$parstack,$parser,$safeeval,$style)=@_;
1.7 albertel 531: my $currentstring='';
1.72 albertel 532: my $nodefault;
1.7 albertel 533: {
1.59 albertel 534: my $sub1;
1.7 albertel 535: no strict 'refs';
1.68 www 536: my $tag=$token->[1];
537: my $space=$Apache::lonxml::alltags{$tag};
538: if (!$space) {
539: $tag=~tr/A-Z/a-z/;
540: $sub=~tr/A-Z/a-z/;
541: $space=$Apache::lonxml::alltags{$tag}
542: }
1.97 albertel 543:
544: my $deleted=0;
545: $Apache::lonxml::curdepth=join('_',@Apache::lonxml::depthcounter);
546: if (($token->[0] eq 'S') && ($target eq 'modified')) {
547: $deleted=&Apache::edit::handle_delete($space,$target,$token,$tagstack,
548: $parstack,$parser,$safeeval,
549: $style);
550: }
551: if (!$deleted) {
552: if ($space) {
553: #&Apache::lonxml::debug("Calling sub $sub in $space $metamode<br />\n");
554: $sub1="$space\:\:$sub";
555: ($currentstring,$nodefault) = &$sub1($target,$token,$tagstack,
556: $parstack,$parser,$safeeval,
557: $style);
558: } else {
559: #&Apache::lonxml::debug("NOT Calling sub $sub in $space $metamode<br />\n");
560: if ($metamode <1) {
561: if (defined($token->[4]) && ($metamode < 1)) {
562: $currentstring = $token->[4];
563: } else {
564: $currentstring = $token->[2];
565: }
1.62 sakharuk 566: }
1.7 albertel 567: }
1.97 albertel 568: # &Apache::lonxml::debug("nodefalt:$nodefault:");
569: if ($currentstring eq '' && $nodefault eq '') {
570: if ($target eq 'edit') {
571: &Apache::lonxml::debug("doing default edit for $token->[1]");
572: if ($token->[0] eq 'S') {
573: $currentstring = &Apache::edit::tag_start($target,$token);
574: } elsif ($token->[0] eq 'E') {
575: $currentstring = &Apache::edit::tag_end($target,$token);
576: }
577: } elsif ($target eq 'modified') {
578: if ($token->[0] eq 'S') {
579: $currentstring = $token->[4];
580: $currentstring.=&Apache::edit::handle_insert();
581: } else {
582: $currentstring = $token->[2];
583: }
1.72 albertel 584: }
585: }
1.7 albertel 586: }
587: use strict 'refs';
588: }
589: return $currentstring;
1.82 ng 590: }
591:
1.96 albertel 592: sub setup_globals {
593: my ($target)=@_;
1.99 albertel 594: $Apache::lonxml::registered = 0;
1.101 albertel 595: @Apache::lonxml::pwd=();
1.96 albertel 596: if ($target eq 'meta') {
597: $Apache::lonxml::redirection = 0;
598: $Apache::lonxml::metamode = 1;
599: $Apache::lonxml::evaluate = 1;
600: $Apache::lonxml::import = 0;
601: } elsif ($target eq 'grade') {
602: &startredirection;
603: $Apache::lonxml::metamode = 0;
604: $Apache::lonxml::evaluate = 1;
605: $Apache::lonxml::import = 1;
606: } elsif ($target eq 'modified') {
607: $Apache::lonxml::redirection = 0;
608: $Apache::lonxml::metamode = 0;
609: $Apache::lonxml::evaluate = 0;
610: $Apache::lonxml::import = 0;
611: } elsif ($target eq 'edit') {
612: $Apache::lonxml::redirection = 0;
613: $Apache::lonxml::metamode = 0;
614: $Apache::lonxml::evaluate = 0;
615: $Apache::lonxml::import = 0;
616: } else {
617: $Apache::lonxml::redirection = 0;
618: $Apache::lonxml::metamode = 0;
619: $Apache::lonxml::evaluate = 1;
620: $Apache::lonxml::import = 1;
621: }
622: }
623:
1.82 ng 624: sub init_safespace {
625: my ($target,$safeeval,$safehole,$safeinit) = @_;
626: $safeeval->permit("entereval");
627: $safeeval->permit(":base_math");
628: $safeeval->permit("sort");
629: $safeeval->deny(":base_io");
1.102 albertel 630: $safehole->wrap(\&Apache::scripttag::xmlparse,$safeeval,'&xmlparse');
1.82 ng 631: $safehole->wrap(\&Apache::lonnet::EXT,$safeeval,'&EXT');
632:
633: $safehole->wrap(\&Math::Cephes::asin,$safeeval,'&asin');
634: $safehole->wrap(\&Math::Cephes::acos,$safeeval,'&acos');
635: $safehole->wrap(\&Math::Cephes::atan,$safeeval,'&atan');
636: $safehole->wrap(\&Math::Cephes::sinh,$safeeval,'&sinh');
637: $safehole->wrap(\&Math::Cephes::cosh,$safeeval,'&cosh');
638: $safehole->wrap(\&Math::Cephes::tanh,$safeeval,'&tanh');
639: $safehole->wrap(\&Math::Cephes::asinh,$safeeval,'&asinh');
640: $safehole->wrap(\&Math::Cephes::acosh,$safeeval,'&acosh');
641: $safehole->wrap(\&Math::Cephes::atanh,$safeeval,'&atanh');
642: $safehole->wrap(\&Math::Cephes::erf,$safeeval,'&erf');
643: $safehole->wrap(\&Math::Cephes::erfc,$safeeval,'&erfc');
644: $safehole->wrap(\&Math::Cephes::j0,$safeeval,'&j0');
645: $safehole->wrap(\&Math::Cephes::j1,$safeeval,'&j1');
646: $safehole->wrap(\&Math::Cephes::jn,$safeeval,'&jn');
647: $safehole->wrap(\&Math::Cephes::jv,$safeeval,'&jv');
648: $safehole->wrap(\&Math::Cephes::y0,$safeeval,'&y0');
649: $safehole->wrap(\&Math::Cephes::y1,$safeeval,'&y1');
650: $safehole->wrap(\&Math::Cephes::yn,$safeeval,'&yn');
651: $safehole->wrap(\&Math::Cephes::yv,$safeeval,'&yv');
1.91 ng 652: $safehole->wrap(\&Math::Random::random_beta,$safeeval,'&math_random_beta');
653: $safehole->wrap(\&Math::Random::random_chi_square,$safeeval,'&math_random_chi_square');
654: $safehole->wrap(\&Math::Random::random_exponential,$safeeval,'&math_random_exponential');
655: $safehole->wrap(\&Math::Random::random_f,$safeeval,'&math_random_f');
656: $safehole->wrap(\&Math::Random::random_gamma,$safeeval,'&math_random_gamma');
657: $safehole->wrap(\&Math::Random::random_multivariate_normal,$safeeval,'&math_random_multivariate_normal');
658: $safehole->wrap(\&Math::Random::random_multinomial,$safeeval,'&math_random_multinomial');
659: $safehole->wrap(\&Math::Random::random_noncentral_chi_square,$safeeval,'&math_random_noncentral_chi_square');
660: $safehole->wrap(\&Math::Random::random_noncentral_f,$safeeval,'&math_random_noncentral_f');
661: $safehole->wrap(\&Math::Random::random_normal,$safeeval,'&math_random_normal');
662: $safehole->wrap(\&Math::Random::random_permutation,$safeeval,'&math_random_permutation');
1.93 ng 663: $safehole->wrap(\&Math::Random::random_permuted_index,$safeeval,'&math_random_permuted_index');
1.91 ng 664: $safehole->wrap(\&Math::Random::random_uniform,$safeeval,'&math_random_uniform');
665: $safehole->wrap(\&Math::Random::random_poisson,$safeeval,'&math_random_poisson');
666: $safehole->wrap(\&Math::Random::random_uniform_integer,$safeeval,'&math_random_uniform_integer');
667: $safehole->wrap(\&Math::Random::random_negative_binomial,$safeeval,'&math_random_negative_binomial');
668: $safehole->wrap(\&Math::Random::random_binomial,$safeeval,'&math_random_binomial');
669: $safehole->wrap(\&Math::Random::random_seed_from_phrase,$safeeval,'&random_seed_from_phrase');
670: $safehole->wrap(\&Math::Random::random_set_seed_from_phrase,$safeeval,'&random_set_seed_from_phrase');
671: $safehole->wrap(\&Math::Random::random_get_seed,$safeeval,'&random_get_seed');
672: $safehole->wrap(\&Math::Random::random_set_seed,$safeeval,'&random_set_seed');
673:
1.82 ng 674: #need to inspect this class of ops
675: # $safeeval->deny(":base_orig");
1.91 ng 676: $safeinit .= ';$external::target="'.$target.'";';
1.82 ng 677: $safeinit .= ';$external::randomseed='.&Apache::lonnet::rndseed().';';
678: &Apache::run::run($safeinit,$safeeval);
1.17 albertel 679: }
680:
1.55 albertel 681: sub startredirection {
682: $Apache::lonxml::redirection++;
683: push (@Apache::lonxml::outputstack, '');
684: }
685:
686: sub endredirection {
687: if (!$Apache::lonxml::redirection) {
1.72 albertel 688: &Apache::lonxml::error("Endredirection was called, before a startredirection, perhaps you have unbalanced tags. Some debuging information:".join ":",caller);
1.55 albertel 689: return '';
690: }
691: $Apache::lonxml::redirection--;
692: pop @Apache::lonxml::outputstack;
1.97 albertel 693: }
694:
695: sub end_tag {
696: my ($tagstack,$parstack,$token)=@_;
697: pop(@$tagstack);
698: pop(@$parstack);
699: &decreasedepth($token);
1.55 albertel 700: }
701:
1.17 albertel 702: sub initdepth {
703: @Apache::lonxml::depthcounter=();
704: $Apache::lonxml::depth=-1;
705: $Apache::lonxml::olddepth=-1;
706: }
707:
708: sub increasedepth {
1.19 albertel 709: my ($token) = @_;
1.17 albertel 710: $Apache::lonxml::depth++;
711: $Apache::lonxml::depthcounter[$Apache::lonxml::depth]++;
712: if ($Apache::lonxml::depthcounter[$Apache::lonxml::depth]==1) {
713: $Apache::lonxml::olddepth=$Apache::lonxml::depth;
714: }
1.42 albertel 715: my $curdepth=join('_',@Apache::lonxml::depthcounter);
1.64 albertel 716: &Apache::lonxml::debug("s $Apache::lonxml::depth : $Apache::lonxml::olddepth : $curdepth : $token->[1]\n");
1.54 albertel 717: #print "<br />s $Apache::lonxml::depth : $Apache::lonxml::olddepth : $curdepth : $token->[1]\n";
1.17 albertel 718: }
719:
720: sub decreasedepth {
1.19 albertel 721: my ($token) = @_;
1.17 albertel 722: $Apache::lonxml::depth--;
1.36 albertel 723: if ($Apache::lonxml::depth<$Apache::lonxml::olddepth-1) {
724: $#Apache::lonxml::depthcounter--;
725: $Apache::lonxml::olddepth=$Apache::lonxml::depth+1;
726: }
1.43 albertel 727: if ( $Apache::lonxml::depth < -1) {
1.49 albertel 728: &Apache::lonxml::warning("Unbalanced tags in resource");
1.43 albertel 729: $Apache::lonxml::depth='-1';
730: }
1.42 albertel 731: my $curdepth=join('_',@Apache::lonxml::depthcounter);
1.64 albertel 732: &Apache::lonxml::debug("e $Apache::lonxml::depth : $Apache::lonxml::olddepth : $token->[1] : $curdepth\n");
1.54 albertel 733: #print "<br />e $Apache::lonxml::depth : $Apache::lonxml::olddepth : $token->[1] : $curdepth\n";
1.1 sakharuk 734: }
1.19 albertel 735:
736: sub get_all_text {
737:
738: my($tag,$pars)= @_;
739: my $depth=0;
740: my $token;
741: my $result='';
1.57 albertel 742: if ( $tag =~ m:^/: ) {
743: my $tag=substr($tag,1);
744: # &Apache::lonxml::debug("have:$tag:");
745: while (($depth >=0) && ($token = $pars->get_token)) {
746: # &Apache::lonxml::debug("e token:$token->[0]:$depth:$token->[1]");
747: if (($token->[0] eq 'T')||($token->[0] eq 'C')||($token->[0] eq 'D')) {
748: $result.=$token->[1];
749: } elsif ($token->[0] eq 'PI') {
750: $result.=$token->[2];
751: } elsif ($token->[0] eq 'S') {
752: if ($token->[1] eq $tag) { $depth++; }
753: $result.=$token->[4];
754: } elsif ($token->[0] eq 'E') {
755: if ( $token->[1] eq $tag) { $depth--; }
756: #skip sending back the last end tag
757: if ($depth > -1) { $result.=$token->[2]; } else {
758: $pars->unget_token($token);
759: }
760: }
761: }
762: } else {
763: while ($token = $pars->get_token) {
764: # &Apache::lonxml::debug("s token:$token->[0]:$depth:$token->[1]");
765: if (($token->[0] eq 'T')||($token->[0] eq 'C')||($token->[0] eq 'D')) {
766: $result.=$token->[1];
767: } elsif ($token->[0] eq 'PI') {
768: $result.=$token->[2];
769: } elsif ($token->[0] eq 'S') {
770: if ( $token->[1] eq $tag) {
771: $pars->unget_token($token); last;
772: } else {
773: $result.=$token->[4];
774: }
775: } elsif ($token->[0] eq 'E') {
776: $result.=$token->[2];
1.36 albertel 777: }
1.19 albertel 778: }
779: }
1.49 albertel 780: # &Apache::lonxml::debug("Exit:$result:");
1.19 albertel 781: return $result
782: }
783:
1.23 albertel 784: sub newparser {
785: my ($parser,$contentref,$dir) = @_;
786: push (@$parser,HTML::TokeParser->new($contentref));
1.56 albertel 787: $$parser['-1']->xml_mode('1');
1.23 albertel 788: if ( $dir eq '' ) {
789: push (@Apache::lonxml::pwd, $Apache::lonxml::pwd[$#Apache::lonxml::pwd]);
790: } else {
791: push (@Apache::lonxml::pwd, $dir);
792: }
793: # &Apache::lonxml::debug("pwd:$#Apache::lonxml::pwd");
794: # &Apache::lonxml::debug("pwd:$Apache::lonxml::pwd[$#Apache::lonxml::pwd]");
795: }
1.1 sakharuk 796:
1.8 albertel 797: sub parstring {
798: my ($token) = @_;
799: my $temp='';
1.20 albertel 800: map {
1.35 www 801: unless ($_=~/\W/) {
1.42 albertel 802: my $val=$token->[2]->{$_};
1.53 albertel 803: $val =~ s/([\%\@\\])/\\$1/g;
1.51 albertel 804: #if ($val =~ m/^[\%\@]/) { $val="\\".$val; }
1.42 albertel 805: $temp .= "my \$$_=\"$val\";"
1.20 albertel 806: }
807: } @{$token->[3]};
1.8 albertel 808: return $temp;
809: }
1.22 albertel 810:
1.34 www 811: sub writeallows {
812: my $thisurl='/res/'.&Apache::lonnet::declutter(shift);
1.111 www 813: if ($ENV{'httpref.'.$thisurl}) {
814: $thisurl=$ENV{'httpref.'.$thisurl};
815: }
1.34 www 816: my $thisdir=$thisurl;
817: $thisdir=~s/\/[^\/]+$//;
818: my %httpref=();
819: map {
820: $httpref{'httpref.'.
821: &Apache::lonnet::hreflocation($thisdir,$_)}=$thisurl; } @extlinks;
822: &Apache::lonnet::appenv(%httpref);
823: }
824:
1.66 www 825: #
826: # Afterburner handles anchors, highlights and links
827: #
828: sub afterburn {
829: my $result=shift;
830: map {
831: my ($name, $value) = split(/=/,$_);
832: $value =~ tr/+/ /;
833: $value =~ s/%([a-fA-F0-9][a-fA-F0-9])/pack("C",hex($1))/eg;
834: if (($name eq 'highlight')||($name eq 'anchor')||($name eq 'link')) {
835: unless ($ENV{'form.'.$name}) {
836: $ENV{'form.'.$name}=$value;
837: }
838: }
839: } (split(/&/,$ENV{'QUERY_STRING'}));
840: if ($ENV{'form.highlight'}) {
841: map {
842: my $anchorname=$_;
843: my $matchthis=$anchorname;
844: $matchthis=~s/\_+/\\s\+/g;
845: $result=~s/($matchthis)/\<font color=\"red\"\>$1\<\/font\>/gs;
846: } split(/\,/,$ENV{'form.highlight'});
847: }
848: if ($ENV{'form.link'}) {
849: map {
850: my ($anchorname,$linkurl)=split(/\>/,$_);
851: my $matchthis=$anchorname;
852: $matchthis=~s/\_+/\\s\+/g;
853: $result=~s/($matchthis)/\<a href=\"$linkurl\"\>$1\<\/a\>/gs;
854: } split(/\,/,$ENV{'form.link'});
855: }
856: if ($ENV{'form.anchor'}) {
857: my $anchorname=$ENV{'form.anchor'};
858: my $matchthis=$anchorname;
859: $matchthis=~s/\_+/\\s\+/g;
860: $result=~s/($matchthis)/\<a name=\"$anchorname\"\>$1\<\/a\>/s;
861: $result.=(<<"ENDSCRIPT");
862: <script>
863: document.location.hash='$anchorname';
864: </script>
865: ENDSCRIPT
866: }
867: return $result;
868: }
869:
1.79 www 870: sub storefile {
871: my ($file,$contents)=@_;
872: if (my $fh=Apache::File->new('>'.$file)) {
873: print $fh $contents;
874: $fh->close();
875: }
876: }
877:
1.78 www 878: sub inserteditinfo {
879: my ($result,$filecontents)=@_;
880: unless ($filecontents) {
881: $filecontents=(<<SIMPLECONTENT);
882: <html>
883: <head>
884: <title>
885: Title of Document Goes Here
886: </title>
887: </head>
888: <body bgcolor="#FFFFFF">
889:
890: Body of Document Goes Here
891:
892: </body>
893: </html>
894: SIMPLECONTENT
895: }
896: my $editheader='<a href="#editsection">Edit below</a><hr />';
897: my $editfooter=(<<ENDFOOTER);
898: <hr />
899: <a name="editsection" />
900: <form method="post">
901: <textarea cols="80" rows="40" name="filecont">$filecontents</textarea>
902: <br />
1.107 www 903: <input type="submit" name="attemptclean"
904: value="Save and then attempt to clean HTML" />
905: <input type="submit" name="savethisfile" value="Save this" />
1.78 www 906: </form>
907: ENDFOOTER
908: $result=~s/(\<body[^\>]*\>)/$1$editheader/is;
909: $result=~s/(\<\/body\>)/$editfooter/is;
910: return $result;
911: }
912:
1.24 sakharuk 913: sub handler {
914: my $request=shift;
1.68 www 915:
1.64 albertel 916: my $target='web';
1.68 www 917:
1.65 albertel 918: $Apache::lonxml::debug=0;
1.68 www 919:
1.25 sakharuk 920: if ($ENV{'browser.mathml'}) {
1.27 albertel 921: $request->content_type('text/xml');
922: } else {
923: $request->content_type('text/html');
1.25 sakharuk 924: }
1.64 albertel 925:
1.27 albertel 926: $request->send_http_header;
1.64 albertel 927:
1.45 www 928: return OK if $request->header_only;
1.27 albertel 929:
1.79 www 930:
931: my $file=&Apache::lonnet::filelocation("",$request->uri);
1.78 www 932: #
933: # Edit action? Save file.
934: #
935: unless ($ENV{'request.state'} eq 'published') {
1.107 www 936: if (($ENV{'form.savethisfile'}) || ($ENV{'form.attemptclean'})) {
1.79 www 937: &storefile($file,$ENV{'form.filecont'});
1.78 www 938: }
939: }
1.24 sakharuk 940: my %mystyle;
1.50 albertel 941: my $result = '';
942: my $filecontents=&Apache::lonnet::getfile($file);
943: if ($filecontents == -1) {
1.78 www 944: $result=(<<ENDNOTFOUND);
945: <html>
946: <head>
947: <title>File not found</title>
948: </head>
949: <body bgcolor="#FFFFFF">
950: <b>File not found: $file</b>
951: </body>
952: </html>
953: ENDNOTFOUND
1.50 albertel 954: $filecontents='';
955: } else {
1.107 www 956: unless ($ENV{'request.state'} eq 'published') {
957: if ($ENV{'form.attemptclean'}) {
958: $filecontents=&htmlclean($filecontents,1);
959: }
960: }
1.50 albertel 961: $result = &Apache::lonxml::xmlparse($target,$filecontents,'',%mystyle);
1.78 www 962: }
963:
964: #
965: # Edit action? Insert editing commands
966: #
967: unless ($ENV{'request.state'} eq 'published') {
968: $result=&inserteditinfo($result,$filecontents);
1.66 www 969: }
1.50 albertel 970:
1.67 www 971: $request->print($result);
1.64 albertel 972:
1.34 www 973: writeallows($request->uri);
1.45 www 974: return OK;
1.24 sakharuk 975: }
976:
1.22 albertel 977: sub debug {
978: if ($Apache::lonxml::debug eq 1) {
1.96 albertel 979: print("DEBUG:".$_[0]."<br />\n");
1.22 albertel 980: }
981: }
1.49 albertel 982:
1.22 albertel 983: sub error {
1.74 albertel 984: if (($Apache::lonxml::debug eq 1) || ($ENV{'request.state'} eq 'construct') ) {
1.55 albertel 985: print "<b>ERROR:</b>".$_[0]."<br />\n";
1.52 albertel 986: } else {
987: print "<b>An Error occured while processing this resource. The instructor has been notified.</b> <br />";
988: #notify author
989: &Apache::lonmsg::author_res_msg($ENV{'request.filename'},$_[0]);
990: #notify course
991: if ( $ENV{'request.course.id'} ) {
992: my $users=$ENV{'course.'.$ENV{'request.course.id'}.'.comment.email'};
993: foreach my $user (split /\,/, $users) {
994: ($user,my $domain) = split /:/, $user;
1.54 albertel 995: &Apache::lonmsg::user_normal_msg($user,$domain,"Error in $ENV{'request.filename'}",$_[0]);
1.52 albertel 996: }
997: }
1.74 albertel 998:
1.52 albertel 999: #FIXME probably shouldn't have me get everything forever.
1.54 albertel 1000: &Apache::lonmsg::user_normal_msg('albertel','msu',"Error in $ENV{'request.filename'}",$_[0]);
1.74 albertel 1001: #&Apache::lonmsg::user_normal_msg('albertel','103',"Error in $ENV{'request.filename'}",$_[0]);
1.52 albertel 1002: }
1.22 albertel 1003: }
1.49 albertel 1004:
1.22 albertel 1005: sub warning {
1.73 harris41 1006: if ($ENV{'request.state'} eq 'construct') {
1.55 albertel 1007: print "<b>W</b>ARNING<b>:</b>".$_[0]."<br />\n";
1.73 harris41 1008: }
1.83 albertel 1009: }
1010:
1011: sub get_param {
1012: my ($param,$parstack,$safeeval,$context) = @_;
1013: if ( ! $context ) { $context = -1; }
1014: my $args ='';
1015: if ( $#$parstack > (-2-$context) ) { $args=$$parstack[$context]; }
1016: return &Apache::run::run("{$args;".'return $'.$param.'}',$safeeval); #'
1.22 albertel 1017: }
1018:
1.74 albertel 1019: sub register_insert {
1.75 albertel 1020: my @data = split /\n/, &Apache::lonnet::getfile('/home/httpd/lonTabs/insertlist.tab');
1.74 albertel 1021: my $i;
1.76 albertel 1022: my $tagnum=0;
1.74 albertel 1023: my @order;
1024: for ($i=0;$i < $#data; $i++) {
1025: my $line = $data[$i];
1026: if ( $line =~ /^\#/ || $line =~ /^\s*\n/) { next; }
1027: if ( $line =~ /TABLE/ ) { last; }
1.92 albertel 1028: my ($tag,$descrip,$color,$function,$show) = split(/,/, $line);
1.76 albertel 1029: $insertlist{"$tagnum.tag"} = $tag;
1030: $insertlist{"$tagnum.description"} = $descrip;
1.92 albertel 1031: $insertlist{"$tagnum.color"} = $color;
1.76 albertel 1032: $insertlist{"$tagnum.function"} = $function;
1033: $insertlist{"$tagnum.show"}= $show;
1.92 albertel 1034: $insertlist{"$tag.num"}=$tagnum;
1.76 albertel 1035: $tagnum++;
1.74 albertel 1036: }
1.76 albertel 1037: $i++; #skipping TABLE line
1038: $tagnum = 0;
1.74 albertel 1039: for (;$i < $#data;$i++) {
1040: my $line = $data[$i];
1.76 albertel 1041: my ($mnemonic,@which) = split(/ +/,$line);
1042: my $tag = $insertlist{"$tagnum.tag"};
1.74 albertel 1043: for (my $j=0;$j <$#which;$j++) {
1044: if ( $which[$j] eq 'Y' ) {
1.76 albertel 1045: if ($insertlist{"$j.show"} ne 'no') {
1046: push(@{ $insertlist{"$tag.which"} },$j);
1047: }
1.74 albertel 1048: }
1049: }
1.76 albertel 1050: $tagnum++;
1.74 albertel 1051: }
1052: }
1.98 albertel 1053:
1054: sub description {
1055: my ($token)=@_;
1056: return $insertlist{$insertlist{"$token->[1].num"}.'.description'};
1057: }
1.1 sakharuk 1058: 1;
1059: __END__
1.68 www 1060:
1061:
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