1: # The LearningOnline Network with CAPA
2: # XML Parser Module
3: #
4: # last modified 06/26/00 by Alexander Sakharuk
5: # 11/6 Gerd Kortemeyer
6: # 6/1/1 Gerd Kortemeyer
7: # 2/21,3/13 Guy
8: # 3/29,5/4 Gerd Kortemeyer
9: # 5/10 Scott Harrison
10: # 5/26 Gerd Kortemeyer
11: # 5/27 H. K. Ng
12: # 6/2,6/3,6/8,6/9 Gerd Kortemeyer
13: # 6/12,6/13 H. K. Ng
14: # 6/16 Gerd Kortemeyer
15: # 7/27 H. K. Ng
16: # 8/7,8/9,8/10,8/11,8/15,8/16,8/17,8/18,8/20 Gerd Kortemeyer
17:
18: package Apache::lonxml;
19: use vars
20: qw(@pwd @outputstack $redirection $import @extlinks $metamode $evaluate %insertlist @namespace);
21: use strict;
22: use HTML::TokeParser;
23: use HTML::TreeBuilder;
24: use Safe;
25: use Safe::Hole;
26: use Math::Cephes qw(:trigs :hypers :bessels erf erfc);
27: use Math::Random qw(:all);
28: use Opcode;
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:
40: use Apache::Constants qw(:common);
41: use Apache::lontexconvert;
42: use Apache::style;
43: use Apache::run;
44: use Apache::londefdef;
45: use Apache::scripttag;
46: use Apache::edit;
47: use Apache::lonnet;
48: use Apache::File;
49:
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;
72:
73: # data structure for eidt mode, determines what tags can go into what other tags
74: %insertlist=();
75:
76: # stores the list of active tag namespaces
77: @namespace=();
78:
79: # has the dynamic menu been updated to know about this resource
80: $Apache::lonxml::registered=0;
81:
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 {
98: my $discussion='';
99: if ($ENV{'request.course.id'}) {
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);
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++) {
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: }
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: $sender.=' (anonymous)';
130: }
131: if ($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: }
139: }
140: }
141: $discussion.='<p><b>'.$sender.'</b> ('.
142: localtime($contrib{$idx.':timestamp'}).
143: '):<blockquote>'.$message.
144: '</blockquote></p>';
145: }
146: }
147: }
148: $discussion.='</address>';
149: }
150: }
151: }
152: return $discussion.'</html>';
153: }
154:
155: sub tokeninputfield {
156: my $defhost=$Apache::lonnet::perlvar{'lonHostID'};
157: $defhost=~tr/a-z/A-Z/;
158: return (<<ENDINPUTFIELD)
159: <script>
160: function updatetoken() {
161: var comp=new Array;
162: var barcode=unescape(document.tokeninput.barcode.value);
163: comp=barcode.split('*');
164: if (typeof(comp[0])!="undefined") {
165: document.tokeninput.codeone.value=comp[0];
166: }
167: if (typeof(comp[1])!="undefined") {
168: document.tokeninput.codetwo.value=comp[1];
169: }
170: if (typeof(comp[2])!="undefined") {
171: comp[2]=comp[2].toUpperCase();
172: document.tokeninput.codethree.value=comp[2];
173: }
174: document.tokeninput.barcode.value='';
175: }
176: </script>
177: <form method="post" name="tokeninput">
178: <table border="2" bgcolor="#FFFFBB">
179: <tr><th>DocID Checkin</th></tr>
180: <tr><td>
181: <table>
182: <tr>
183: <td>Scan in Barcode</td>
184: <td><input type="text" size="22" name="barcode"
185: onChange="updatetoken()"/></td>
186: </tr>
187: <tr><td><i>or</i> Type in DocID</td>
188: <td>
189: <input type="text" size="5" name="codeone" />
190: <b><font size="+2">*</font></b>
191: <input type="text" size="5" name="codetwo" />
192: <b><font size="+2">*</font></b>
193: <input type="text" size="10" name="codethree" value="$defhost"
194: onChange="this.value=this.value.toUpperCase()" />
195: </td></tr>
196: </table>
197: </td></tr>
198: <tr><td><input type="submit" value="Check in DocID" /></td></tr>
199: </table>
200: </form>
201: ENDINPUTFIELD
202: }
203:
204: sub maketoken {
205: my ($symb,$tuname,$tudom,$tcrsid)=@_;
206: unless ($symb) {
207: $symb=&Apache::lonnet::symbread();
208: }
209: unless ($tuname) {
210: $tuname=$ENV{'user.name'};
211: $tudom=$ENV{'user.domain'};
212: $tcrsid=$ENV{'request.course.id'};
213: }
214:
215: return &Apache::lonnet::checkout($symb,$tuname,$tudom,$tcrsid);
216: }
217:
218: sub printtokenheader {
219: my ($target,$token,$symb,$tuname,$tudom,$tcrsid)=@_;
220: unless ($token) { return ''; }
221:
222: unless ($symb) {
223: $symb=&Apache::lonnet::symbread();
224: }
225: unless ($tuname) {
226: $tuname=$ENV{'user.name'};
227: $tudom=$ENV{'user.domain'};
228: $tcrsid=$ENV{'request.course.id'};
229: }
230:
231: my %reply=&Apache::lonnet::get('environment',
232: ['firstname','middlename','lastname','generation'],
233: $tudom,$tuname);
234: my $plainname=$reply{'firstname'}.' '.
235: $reply{'middlename'}.' '.
236: $reply{'lastname'}.' '.
237: $reply{'generation'};
238:
239: if ($target eq 'web') {
240: return
241: '<img align="right" src="/cgi-bin/barcode.gif?encode='.$token.'" />'.
242: 'Checked out for '.$plainname.
243: '<br />User: '.$tuname.' at '.$tudom.
244: '<br />CourseID: '.$tcrsid.
245: '<br />DocID: '.$token.
246: '<br />Time: '.localtime().'<hr />';
247: } else {
248: return $token;
249: }
250: }
251:
252: sub fontsettings() {
253: my $headerstring='';
254: if (($ENV{'browser.os'} eq 'mac') && (!$ENV{'browser.mathml'})) {
255: $headerstring.=
256: '<meta Content-Type="text/html; charset=x-mac-roman">';
257: }
258: return $headerstring;
259: }
260:
261: sub registerurl {
262: my $forcereg=shift;
263: if ($Apache::lonxml::registered) { return ''; }
264: $Apache::lonxml::registered=1;
265: if (($ENV{'REQUEST_URI'}!~/^\/(res\/)*adm\//) || ($forcereg)) {
266: my $hwkadd='';
267: if ($ENV{'REQUEST_URI'}=~/\.(problem|exam|quiz|assess|survey|form)$/) {
268: if (&Apache::lonnet::allowed('vgr',$ENV{'request.course.id'})) {
269: $hwkadd.=(<<ENDSUBM);
270: menu.switchbutton
271: (7,1,'subm.gif','view sub','missions',
272: 'gocmd("/adm/grades","submission")');
273: ENDSUBM
274: }
275: if (&Apache::lonnet::allowed('mgr',$ENV{'request.course.id'})) {
276: $hwkadd.=(<<ENDGRDS);
277: menu.switchbutton
278: (7,2,'pgrd.gif','problem','grades',
279: 'gocmd("/adm/grades","viewgrades")');
280: ENDGRDS
281: }
282: if (&Apache::lonnet::allowed('opa',$ENV{'request.course.id'})) {
283: $hwkadd.=(<<ENDPARM);
284: menu.switchbutton
285: (7,3,'pparm.gif','problem','parms',
286: 'gocmd("/adm/parmset","set")');
287: ENDPARM
288: }
289: }
290: return (<<ENDREGTHIS);
291:
292: <script language="JavaScript">
293: // BEGIN LON-CAPA Internal
294:
295: function LONCAPAreg() {
296: menu=window.open("","LONCAPAmenu");
297: menu.clearTimeout(menu.menucltim);
298: menu.currentURL=window.location.pathname;
299: menu.currentStale=0;
300: menu.clearbut(3,1);
301: menu.switchbutton
302: (6,3,'catalog.gif','catalog','info','catalog_info()');
303: menu.switchbutton
304: (8,1,'eval.gif','evaluate','this','gopost("/adm/evaluate",currentURL)');
305: menu.switchbutton
306: (8,2,'fdbk.gif','feedback','on this','gopost("/adm/feedback",currentURL)');
307: menu.switchbutton
308: (8,3,'prt.gif','prepare','printout','gopost("/adm/printout",currentURL)');
309: menu.switchbutton
310: (2,1,'back.gif','backward','','gopost("/adm/flip","back:"+currentURL)');
311: menu.switchbutton
312: (2,3,'forw.gif','forward','','gopost("/adm/flip","forward:"+currentURL)');
313: menu.switchbutton
314: (9,1,'sbkm.gif','set','bookmark','set_bookmark()');
315: menu.switchbutton
316: (9,2,'vbkm.gif','view','bookmark','edit_bookmarks()');
317: menu.switchbutton
318: (9,3,'anot.gif','anno-','tations','annotate()');
319: $hwkadd
320: }
321:
322: function LONCAPAstale() {
323: menu=window.open("","LONCAPAmenu");
324: menu.currentStale=1;
325: menu.switchbutton
326: (3,1,'reload.gif','return','location','go(currentURL)');
327: menu.clearbut(7,1);
328: menu.clearbut(7,2);
329: menu.clearbut(7,3);
330: menu.menucltim=menu.setTimeout(
331: 'clearbut(2,1);clearbut(2,3);clearbut(8,1);clearbut(8,2);clearbut(8,3);'+
332: 'clearbut(9,1);clearbut(9,2);clearbut(9,3);clearbut(6,3)',
333: 2000);
334:
335: }
336:
337: // END LON-CAPA Internal
338: </script>
339: ENDREGTHIS
340:
341: } else {
342: return (<<ENDDONOTREGTHIS);
343:
344: <script language="JavaScript">
345: // BEGIN LON-CAPA Internal
346:
347: function LONCAPAreg() {
348: menu=window.open("","LONCAPAmenu");
349: menu.currentStale=1;
350: menu.clearbut(2,1);
351: menu.clearbut(2,3);
352: menu.clearbut(8,1);
353: menu.clearbut(8,2);
354: menu.clearbut(8,3);
355: if (menu.currentURL) {
356: menu.switchbutton
357: (3,1,'reload.gif','return','location','go(currentURL)');
358: } else {
359: menu.clearbut(3,1);
360: }
361: }
362:
363: function LONCAPAstale() {
364: }
365:
366: // END LON-CAPA Internal
367: </script>
368: ENDDONOTREGTHIS
369:
370: }
371: }
372:
373: sub loadevents() {
374: return 'LONCAPAreg();';
375: }
376:
377: sub unloadevents() {
378: return 'LONCAPAstale();';
379: }
380:
381: sub printalltags {
382: my $temp;
383: foreach $temp (sort keys %Apache::lonxml::alltags) {
384: &Apache::lonxml::debug("$temp -- $Apache::lonxml::alltags{$temp}");
385: }
386: }
387:
388: sub xmlparse {
389: my ($target,$content_file_string,$safeinit,%style_for_target) = @_;
390:
391: &setup_globals($target);
392: #&printalltags();
393: my @pars = ();
394: my $pwd=$ENV{'request.filename'};
395: $pwd =~ s:/[^/]*$::;
396: &newparser(\@pars,\$content_file_string,$pwd);
397:
398: my $safeeval = new Safe;
399: my $safehole = new Safe::Hole;
400: &init_safespace($target,$safeeval,$safehole,$safeinit);
401: #-------------------- Redefinition of the target in the case of compound target
402:
403: ($target, my @tenta) = split('&&',$target);
404:
405: my @stack = ();
406: my @parstack = ();
407: &initdepth;
408:
409: my $finaloutput = &inner_xmlparse($target,\@stack,\@parstack,\@pars,
410: $safeeval,\%style_for_target);
411:
412: return $finaloutput;
413: }
414:
415: sub htmlclean {
416: my ($raw,$full)=@_;
417:
418: my $tree = HTML::TreeBuilder->new;
419: $tree->ignore_unknown(0);
420:
421: $tree->parse($raw);
422:
423: my $output= $tree->as_HTML(undef,' ');
424:
425: $output=~s/\<(br|hr|img|meta|allow)([^\>\/]*)\>/\<$1$2 \/\>/gis;
426: $output=~s/\<\/(br|hr|img|meta|allow)\>//gis;
427: unless ($full) {
428: $output=~s/\<[\/]*(body|head|html)\>//gis;
429: }
430:
431: $tree = $tree->delete;
432:
433: return $output;
434: }
435:
436: sub inner_xmlparse {
437: my ($target,$stack,$parstack,$pars,$safeeval,$style_for_target)=@_;
438: my $finaloutput = '';
439: my $result;
440: my $token;
441: while ( $#$pars > -1 ) {
442: while ($token = $$pars['-1']->get_token) {
443: if (($token->[0] eq 'T') || ($token->[0] eq 'C') || ($token->[0] eq 'D') ) {
444: if ($metamode<1) {
445: $result=$token->[1];
446: }
447: } elsif ($token->[0] eq 'PI') {
448: if ($metamode<1) {
449: $result=$token->[2];
450: }
451: } elsif ($token->[0] eq 'S') {
452: # add tag to stack
453: push (@$stack,$token->[1]);
454: # add parameters list to another stack
455: push (@$parstack,&parstring($token));
456: &increasedepth($token);
457: if (exists $$style_for_target{$token->[1]}) {
458: if ($Apache::lonxml::redirection) {
459: $Apache::lonxml::outputstack['-1'] .=
460: &recurse($$style_for_target{$token->[1]},$target,$safeeval,
461: $style_for_target,@$parstack);
462: } else {
463: $finaloutput .= &recurse($$style_for_target{$token->[1]},$target,
464: $safeeval,$style_for_target,@$parstack);
465: }
466: } else {
467: $result = &callsub("start_$token->[1]", $target, $token, $stack,
468: $parstack, $pars, $safeeval, $style_for_target);
469: }
470: } elsif ($token->[0] eq 'E') {
471: #clear out any tags that didn't end
472: while ($token->[1] ne $$stack['-1'] && ($#$stack > -1)) {
473: &Apache::lonxml::warning("Unbalanced tags in resource $$stack['-1']");
474: &end_tag($stack,$parstack,$token);
475: }
476:
477: if (exists $$style_for_target{'/'."$token->[1]"}) {
478: if ($Apache::lonxml::redirection) {
479: $Apache::lonxml::outputstack['-1'] .=
480: &recurse($$style_for_target{'/'."$token->[1]"},
481: $target,$safeeval,$style_for_target,@$parstack);
482: } else {
483: $finaloutput .= &recurse($$style_for_target{'/'."$token->[1]"},
484: $target,$safeeval,$style_for_target,
485: @$parstack);
486: }
487:
488: } else {
489: $result = &callsub("end_$token->[1]", $target, $token, $stack,
490: $parstack, $pars,$safeeval, $style_for_target);
491: }
492: } else {
493: &Apache::lonxml::error("Unknown token event :$token->[0]:$token->[1]:");
494: }
495: #evaluate variable refs in result
496: if ($result ne "") {
497: if ( $#$parstack > -1 ) {
498: if ($Apache::lonxml::redirection) {
499: $Apache::lonxml::outputstack['-1'] .=
500: &Apache::run::evaluate($result,$safeeval,$$parstack['-1']);
501: } else {
502: $finaloutput .= &Apache::run::evaluate($result,$safeeval,
503: $$parstack['-1']);
504: }
505: } else {
506: $finaloutput .= &Apache::run::evaluate($result,$safeeval,'');
507: }
508: $result = '';
509: }
510: if ($token->[0] eq 'E') {
511: &end_tag($stack,$parstack,$token);
512: }
513: }
514: pop @$pars;
515: pop @Apache::lonxml::pwd;
516: }
517:
518: # if ($target eq 'meta') {
519: # $finaloutput.=&endredirection;
520: # }
521:
522: if (($ENV{'QUERY_STRING'}) && ($target eq 'web')) {
523: $finaloutput=&afterburn($finaloutput);
524: }
525: return $finaloutput;
526: }
527:
528: sub recurse {
529: my @innerstack = ();
530: my @innerparstack = ();
531: my ($newarg,$target,$safeeval,$style_for_target,@parstack) = @_;
532: my @pat = ();
533: &newparser(\@pat,\$newarg);
534: my $tokenpat;
535: my $partstring = '';
536: my $output='';
537: my $decls='';
538: while ( $#pat > -1 ) {
539: while ($tokenpat = $pat[$#pat]->get_token) {
540: if (($tokenpat->[0] eq 'T') || ($tokenpat->[0] eq 'C') || ($tokenpat->[0] eq 'D') ) {
541: if ($metamode<1) { $partstring=$tokenpat->[1]; }
542: } elsif ($tokenpat->[0] eq 'PI') {
543: if ($metamode<1) { $partstring=$tokenpat->[2]; }
544: } elsif ($tokenpat->[0] eq 'S') {
545: push (@innerstack,$tokenpat->[1]);
546: push (@innerparstack,&parstring($tokenpat));
547: &increasedepth($tokenpat);
548: $partstring = &callsub("start_$tokenpat->[1]", $target, $tokenpat,
549: \@innerstack, \@innerparstack, \@pat,
550: $safeeval, $style_for_target);
551: } elsif ($tokenpat->[0] eq 'E') {
552: #clear out any tags that didn't end
553: while ($tokenpat->[1] ne $innerstack[$#innerstack]
554: && ($#innerstack > -1)) {
555: &Apache::lonxml::warning("Unbalanced tags in resource $innerstack['-1']");
556: &end_tag(\@innerstack,\@innerparstack,$tokenpat);
557: }
558: $partstring = &callsub("end_$tokenpat->[1]", $target, $tokenpat,
559: \@innerstack, \@innerparstack, \@pat,
560: $safeeval, $style_for_target);
561: } else {
562: &Apache::lonxml::error("Unknown token event :$tokenpat->[0]:$tokenpat->[1]:");
563: }
564: #pass both the variable to the style tag, and the tag we
565: #are processing inside the <definedtag>
566: if ( $partstring ne "" ) {
567: if ( $#parstack > -1 ) {
568: if ( $#innerparstack > -1 ) {
569: $decls= $parstack[$#parstack].$innerparstack[$#innerparstack];
570: } else {
571: $decls= $parstack[$#parstack];
572: }
573: } else {
574: if ( $#innerparstack > -1 ) {
575: $decls=$innerparstack[$#innerparstack];
576: } else {
577: $decls='';
578: }
579: }
580: $output .= &Apache::run::evaluate($partstring,$safeeval,$decls);
581: $partstring = '';
582: }
583: if ($tokenpat->[0] eq 'E') { pop @innerstack;pop @innerparstack;
584: &decreasedepth($tokenpat);}
585: }
586: pop @pat;
587: pop @Apache::lonxml::pwd;
588: }
589: return $output;
590: }
591:
592: sub callsub {
593: my ($sub,$target,$token,$tagstack,$parstack,$parser,$safeeval,$style)=@_;
594: my $currentstring='';
595: my $nodefault;
596: {
597: my $sub1;
598: no strict 'refs';
599: my $tag=$token->[1];
600: my $space=$Apache::lonxml::alltags{$tag};
601: if (!$space) {
602: $tag=~tr/A-Z/a-z/;
603: $sub=~tr/A-Z/a-z/;
604: $space=$Apache::lonxml::alltags{$tag}
605: }
606:
607: my $deleted=0;
608: $Apache::lonxml::curdepth=join('_',@Apache::lonxml::depthcounter);
609: if (($token->[0] eq 'S') && ($target eq 'modified')) {
610: $deleted=&Apache::edit::handle_delete($space,$target,$token,$tagstack,
611: $parstack,$parser,$safeeval,
612: $style);
613: }
614: if (!$deleted) {
615: if ($space) {
616: #&Apache::lonxml::debug("Calling sub $sub in $space $metamode<br />\n");
617: $sub1="$space\:\:$sub";
618: ($currentstring,$nodefault) = &$sub1($target,$token,$tagstack,
619: $parstack,$parser,$safeeval,
620: $style);
621: } else {
622: #&Apache::lonxml::debug("NOT Calling sub $sub in $space $metamode<br />\n");
623: if ($metamode <1) {
624: if (defined($token->[4]) && ($metamode < 1)) {
625: $currentstring = $token->[4];
626: } else {
627: $currentstring = $token->[2];
628: }
629: }
630: }
631: # &Apache::lonxml::debug("nodefalt:$nodefault:");
632: if ($currentstring eq '' && $nodefault eq '') {
633: if ($target eq 'edit') {
634: &Apache::lonxml::debug("doing default edit for $token->[1]");
635: if ($token->[0] eq 'S') {
636: $currentstring = &Apache::edit::tag_start($target,$token);
637: } elsif ($token->[0] eq 'E') {
638: $currentstring = &Apache::edit::tag_end($target,$token);
639: }
640: } elsif ($target eq 'modified') {
641: if ($token->[0] eq 'S') {
642: $currentstring = $token->[4];
643: $currentstring.=&Apache::edit::handle_insert();
644: } else {
645: $currentstring = $token->[2];
646: }
647: }
648: }
649: }
650: use strict 'refs';
651: }
652: return $currentstring;
653: }
654:
655: sub setup_globals {
656: my ($target)=@_;
657: $Apache::lonxml::registered = 0;
658: @Apache::lonxml::pwd=();
659: if ($target eq 'meta') {
660: $Apache::lonxml::redirection = 0;
661: $Apache::lonxml::metamode = 1;
662: $Apache::lonxml::evaluate = 1;
663: $Apache::lonxml::import = 0;
664: } elsif ($target eq 'grade') {
665: &startredirection;
666: $Apache::lonxml::metamode = 0;
667: $Apache::lonxml::evaluate = 1;
668: $Apache::lonxml::import = 1;
669: } elsif ($target eq 'modified') {
670: $Apache::lonxml::redirection = 0;
671: $Apache::lonxml::metamode = 0;
672: $Apache::lonxml::evaluate = 0;
673: $Apache::lonxml::import = 0;
674: } elsif ($target eq 'edit') {
675: $Apache::lonxml::redirection = 0;
676: $Apache::lonxml::metamode = 0;
677: $Apache::lonxml::evaluate = 0;
678: $Apache::lonxml::import = 0;
679: } else {
680: $Apache::lonxml::redirection = 0;
681: $Apache::lonxml::metamode = 0;
682: $Apache::lonxml::evaluate = 1;
683: $Apache::lonxml::import = 1;
684: }
685: }
686:
687: sub init_safespace {
688: my ($target,$safeeval,$safehole,$safeinit) = @_;
689: $safeeval->permit("entereval");
690: $safeeval->permit(":base_math");
691: $safeeval->permit("sort");
692: $safeeval->deny(":base_io");
693: $safehole->wrap(\&Apache::scripttag::xmlparse,$safeeval,'&xmlparse');
694: $safehole->wrap(\&Apache::lonnet::EXT,$safeeval,'&EXT');
695:
696: $safehole->wrap(\&Math::Cephes::asin,$safeeval,'&asin');
697: $safehole->wrap(\&Math::Cephes::acos,$safeeval,'&acos');
698: $safehole->wrap(\&Math::Cephes::atan,$safeeval,'&atan');
699: $safehole->wrap(\&Math::Cephes::sinh,$safeeval,'&sinh');
700: $safehole->wrap(\&Math::Cephes::cosh,$safeeval,'&cosh');
701: $safehole->wrap(\&Math::Cephes::tanh,$safeeval,'&tanh');
702: $safehole->wrap(\&Math::Cephes::asinh,$safeeval,'&asinh');
703: $safehole->wrap(\&Math::Cephes::acosh,$safeeval,'&acosh');
704: $safehole->wrap(\&Math::Cephes::atanh,$safeeval,'&atanh');
705: $safehole->wrap(\&Math::Cephes::erf,$safeeval,'&erf');
706: $safehole->wrap(\&Math::Cephes::erfc,$safeeval,'&erfc');
707: $safehole->wrap(\&Math::Cephes::j0,$safeeval,'&j0');
708: $safehole->wrap(\&Math::Cephes::j1,$safeeval,'&j1');
709: $safehole->wrap(\&Math::Cephes::jn,$safeeval,'&jn');
710: $safehole->wrap(\&Math::Cephes::jv,$safeeval,'&jv');
711: $safehole->wrap(\&Math::Cephes::y0,$safeeval,'&y0');
712: $safehole->wrap(\&Math::Cephes::y1,$safeeval,'&y1');
713: $safehole->wrap(\&Math::Cephes::yn,$safeeval,'&yn');
714: $safehole->wrap(\&Math::Cephes::yv,$safeeval,'&yv');
715: $safehole->wrap(\&Math::Random::random_beta,$safeeval,'&math_random_beta');
716: $safehole->wrap(\&Math::Random::random_chi_square,$safeeval,'&math_random_chi_square');
717: $safehole->wrap(\&Math::Random::random_exponential,$safeeval,'&math_random_exponential');
718: $safehole->wrap(\&Math::Random::random_f,$safeeval,'&math_random_f');
719: $safehole->wrap(\&Math::Random::random_gamma,$safeeval,'&math_random_gamma');
720: $safehole->wrap(\&Math::Random::random_multivariate_normal,$safeeval,'&math_random_multivariate_normal');
721: $safehole->wrap(\&Math::Random::random_multinomial,$safeeval,'&math_random_multinomial');
722: $safehole->wrap(\&Math::Random::random_noncentral_chi_square,$safeeval,'&math_random_noncentral_chi_square');
723: $safehole->wrap(\&Math::Random::random_noncentral_f,$safeeval,'&math_random_noncentral_f');
724: $safehole->wrap(\&Math::Random::random_normal,$safeeval,'&math_random_normal');
725: $safehole->wrap(\&Math::Random::random_permutation,$safeeval,'&math_random_permutation');
726: $safehole->wrap(\&Math::Random::random_permuted_index,$safeeval,'&math_random_permuted_index');
727: $safehole->wrap(\&Math::Random::random_uniform,$safeeval,'&math_random_uniform');
728: $safehole->wrap(\&Math::Random::random_poisson,$safeeval,'&math_random_poisson');
729: $safehole->wrap(\&Math::Random::random_uniform_integer,$safeeval,'&math_random_uniform_integer');
730: $safehole->wrap(\&Math::Random::random_negative_binomial,$safeeval,'&math_random_negative_binomial');
731: $safehole->wrap(\&Math::Random::random_binomial,$safeeval,'&math_random_binomial');
732: $safehole->wrap(\&Math::Random::random_seed_from_phrase,$safeeval,'&random_seed_from_phrase');
733: $safehole->wrap(\&Math::Random::random_set_seed_from_phrase,$safeeval,'&random_set_seed_from_phrase');
734: $safehole->wrap(\&Math::Random::random_get_seed,$safeeval,'&random_get_seed');
735: $safehole->wrap(\&Math::Random::random_set_seed,$safeeval,'&random_set_seed');
736:
737: #need to inspect this class of ops
738: # $safeeval->deny(":base_orig");
739: $safeinit .= ';$external::target="'.$target.'";';
740: my $rndseed;
741: if (defined(&Apache::lonhomework::whichuser)) {
742: my ($symb,$courseid,$domain,$name) = &Apache::lonhomework::whichuser();
743: $rndseed=&Apache::lonnet::rndseed($symb,$courseid,$domain,$name);
744: } else {
745: $rndseed=&Apache::lonnet::rndseed();
746: }
747: $safeinit .= ';$external::randomseed='.$rndseed.';';
748: &Apache::run::run($safeinit,$safeeval);
749: }
750:
751: sub startredirection {
752: $Apache::lonxml::redirection++;
753: push (@Apache::lonxml::outputstack, '');
754: }
755:
756: sub endredirection {
757: if (!$Apache::lonxml::redirection) {
758: &Apache::lonxml::error("Endredirection was called, before a startredirection, perhaps you have unbalanced tags. Some debuging information:".join ":",caller);
759: return '';
760: }
761: $Apache::lonxml::redirection--;
762: pop @Apache::lonxml::outputstack;
763: }
764:
765: sub end_tag {
766: my ($tagstack,$parstack,$token)=@_;
767: pop(@$tagstack);
768: pop(@$parstack);
769: &decreasedepth($token);
770: }
771:
772: sub initdepth {
773: @Apache::lonxml::depthcounter=();
774: $Apache::lonxml::depth=-1;
775: $Apache::lonxml::olddepth=-1;
776: }
777:
778: sub increasedepth {
779: my ($token) = @_;
780: $Apache::lonxml::depth++;
781: $Apache::lonxml::depthcounter[$Apache::lonxml::depth]++;
782: if ($Apache::lonxml::depthcounter[$Apache::lonxml::depth]==1) {
783: $Apache::lonxml::olddepth=$Apache::lonxml::depth;
784: }
785: my $curdepth=join('_',@Apache::lonxml::depthcounter);
786: &Apache::lonxml::debug("s $Apache::lonxml::depth : $Apache::lonxml::olddepth : $curdepth : $token->[1]\n");
787: #print "<br />s $Apache::lonxml::depth : $Apache::lonxml::olddepth : $curdepth : $token->[1]\n";
788: }
789:
790: sub decreasedepth {
791: my ($token) = @_;
792: $Apache::lonxml::depth--;
793: if ($Apache::lonxml::depth<$Apache::lonxml::olddepth-1) {
794: $#Apache::lonxml::depthcounter--;
795: $Apache::lonxml::olddepth=$Apache::lonxml::depth+1;
796: }
797: if ( $Apache::lonxml::depth < -1) {
798: &Apache::lonxml::warning("Unbalanced tags in resource");
799: $Apache::lonxml::depth='-1';
800: }
801: my $curdepth=join('_',@Apache::lonxml::depthcounter);
802: &Apache::lonxml::debug("e $Apache::lonxml::depth : $Apache::lonxml::olddepth : $token->[1] : $curdepth\n");
803: #print "<br />e $Apache::lonxml::depth : $Apache::lonxml::olddepth : $token->[1] : $curdepth\n";
804: }
805:
806: sub get_all_text {
807:
808: my($tag,$pars)= @_;
809: my $depth=0;
810: my $token;
811: my $result='';
812: if ( $tag =~ m:^/: ) {
813: my $tag=substr($tag,1);
814: # &Apache::lonxml::debug("have:$tag:");
815: while (($depth >=0) && ($token = $pars->get_token)) {
816: # &Apache::lonxml::debug("e token:$token->[0]:$depth:$token->[1]");
817: if (($token->[0] eq 'T')||($token->[0] eq 'C')||($token->[0] eq 'D')) {
818: $result.=$token->[1];
819: } elsif ($token->[0] eq 'PI') {
820: $result.=$token->[2];
821: } elsif ($token->[0] eq 'S') {
822: if ($token->[1] eq $tag) { $depth++; }
823: $result.=$token->[4];
824: } elsif ($token->[0] eq 'E') {
825: if ( $token->[1] eq $tag) { $depth--; }
826: #skip sending back the last end tag
827: if ($depth > -1) { $result.=$token->[2]; } else {
828: $pars->unget_token($token);
829: }
830: }
831: }
832: } else {
833: while ($token = $pars->get_token) {
834: # &Apache::lonxml::debug("s token:$token->[0]:$depth:$token->[1]");
835: if (($token->[0] eq 'T')||($token->[0] eq 'C')||($token->[0] eq 'D')) {
836: $result.=$token->[1];
837: } elsif ($token->[0] eq 'PI') {
838: $result.=$token->[2];
839: } elsif ($token->[0] eq 'S') {
840: if ( $token->[1] eq $tag) {
841: $pars->unget_token($token); last;
842: } else {
843: $result.=$token->[4];
844: }
845: } elsif ($token->[0] eq 'E') {
846: $result.=$token->[2];
847: }
848: }
849: }
850: # &Apache::lonxml::debug("Exit:$result:");
851: return $result
852: }
853:
854: sub newparser {
855: my ($parser,$contentref,$dir) = @_;
856: push (@$parser,HTML::TokeParser->new($contentref));
857: $$parser['-1']->xml_mode('1');
858: if ( $dir eq '' ) {
859: push (@Apache::lonxml::pwd, $Apache::lonxml::pwd[$#Apache::lonxml::pwd]);
860: } else {
861: push (@Apache::lonxml::pwd, $dir);
862: }
863: # &Apache::lonxml::debug("pwd:$#Apache::lonxml::pwd");
864: # &Apache::lonxml::debug("pwd:$Apache::lonxml::pwd[$#Apache::lonxml::pwd]");
865: }
866:
867: sub parstring {
868: my ($token) = @_;
869: my $temp='';
870: map {
871: unless ($_=~/\W/) {
872: my $val=$token->[2]->{$_};
873: $val =~ s/([\%\@\\])/\\$1/g;
874: #if ($val =~ m/^[\%\@]/) { $val="\\".$val; }
875: $temp .= "my \$$_=\"$val\";"
876: }
877: } @{$token->[3]};
878: return $temp;
879: }
880:
881: sub writeallows {
882: my $thisurl='/res/'.&Apache::lonnet::declutter(shift);
883: if ($ENV{'httpref.'.$thisurl}) {
884: $thisurl=$ENV{'httpref.'.$thisurl};
885: }
886: my $thisdir=$thisurl;
887: $thisdir=~s/\/[^\/]+$//;
888: my %httpref=();
889: map {
890: $httpref{'httpref.'.
891: &Apache::lonnet::hreflocation($thisdir,$_)}=$thisurl; } @extlinks;
892: &Apache::lonnet::appenv(%httpref);
893: }
894:
895: #
896: # Afterburner handles anchors, highlights and links
897: #
898: sub afterburn {
899: my $result=shift;
900: map {
901: my ($name, $value) = split(/=/,$_);
902: $value =~ tr/+/ /;
903: $value =~ s/%([a-fA-F0-9][a-fA-F0-9])/pack("C",hex($1))/eg;
904: if (($name eq 'highlight')||($name eq 'anchor')||($name eq 'link')) {
905: unless ($ENV{'form.'.$name}) {
906: $ENV{'form.'.$name}=$value;
907: }
908: }
909: } (split(/&/,$ENV{'QUERY_STRING'}));
910: if ($ENV{'form.highlight'}) {
911: map {
912: my $anchorname=$_;
913: my $matchthis=$anchorname;
914: $matchthis=~s/\_+/\\s\+/g;
915: $result=~s/($matchthis)/\<font color=\"red\"\>$1\<\/font\>/gs;
916: } split(/\,/,$ENV{'form.highlight'});
917: }
918: if ($ENV{'form.link'}) {
919: map {
920: my ($anchorname,$linkurl)=split(/\>/,$_);
921: my $matchthis=$anchorname;
922: $matchthis=~s/\_+/\\s\+/g;
923: $result=~s/($matchthis)/\<a href=\"$linkurl\"\>$1\<\/a\>/gs;
924: } split(/\,/,$ENV{'form.link'});
925: }
926: if ($ENV{'form.anchor'}) {
927: my $anchorname=$ENV{'form.anchor'};
928: my $matchthis=$anchorname;
929: $matchthis=~s/\_+/\\s\+/g;
930: $result=~s/($matchthis)/\<a name=\"$anchorname\"\>$1\<\/a\>/s;
931: $result.=(<<"ENDSCRIPT");
932: <script>
933: document.location.hash='$anchorname';
934: </script>
935: ENDSCRIPT
936: }
937: return $result;
938: }
939:
940: sub storefile {
941: my ($file,$contents)=@_;
942: if (my $fh=Apache::File->new('>'.$file)) {
943: print $fh $contents;
944: $fh->close();
945: }
946: }
947:
948: sub inserteditinfo {
949: my ($result,$filecontents)=@_;
950: unless ($filecontents) {
951: $filecontents=(<<SIMPLECONTENT);
952: <html>
953: <head>
954: <title>
955: Title of Document Goes Here
956: </title>
957: </head>
958: <body bgcolor="#FFFFFF">
959:
960: Body of Document Goes Here
961:
962: </body>
963: </html>
964: SIMPLECONTENT
965: }
966: my $editheader='<a href="#editsection">Edit below</a><hr />';
967: my $editfooter=(<<ENDFOOTER);
968: <hr />
969: <a name="editsection" />
970: <form method="post">
971: <textarea cols="80" rows="40" name="filecont">$filecontents</textarea>
972: <br />
973: <input type="submit" name="attemptclean"
974: value="Save and then attempt to clean HTML" />
975: <input type="submit" name="savethisfile" value="Save this" />
976: </form>
977: ENDFOOTER
978: $result=~s/(\<body[^\>]*\>)/$1$editheader/is;
979: $result=~s/(\<\/body\>)/$editfooter/is;
980: return $result;
981: }
982:
983: sub handler {
984: my $request=shift;
985:
986: my $target='web';
987:
988: $Apache::lonxml::debug=0;
989:
990: if ($ENV{'browser.mathml'}) {
991: $request->content_type('text/xml');
992: } else {
993: $request->content_type('text/html');
994: }
995:
996: $request->send_http_header;
997:
998: return OK if $request->header_only;
999:
1000:
1001: my $file=&Apache::lonnet::filelocation("",$request->uri);
1002: #
1003: # Edit action? Save file.
1004: #
1005: unless ($ENV{'request.state'} eq 'published') {
1006: if (($ENV{'form.savethisfile'}) || ($ENV{'form.attemptclean'})) {
1007: &storefile($file,$ENV{'form.filecont'});
1008: }
1009: }
1010: my %mystyle;
1011: my $result = '';
1012: my $filecontents=&Apache::lonnet::getfile($file);
1013: if ($filecontents == -1) {
1014: $result=(<<ENDNOTFOUND);
1015: <html>
1016: <head>
1017: <title>File not found</title>
1018: </head>
1019: <body bgcolor="#FFFFFF">
1020: <b>File not found: $file</b>
1021: </body>
1022: </html>
1023: ENDNOTFOUND
1024: $filecontents='';
1025: } else {
1026: unless ($ENV{'request.state'} eq 'published') {
1027: if ($ENV{'form.attemptclean'}) {
1028: $filecontents=&htmlclean($filecontents,1);
1029: }
1030: }
1031: $result = &Apache::lonxml::xmlparse($target,$filecontents,'',%mystyle);
1032: }
1033:
1034: #
1035: # Edit action? Insert editing commands
1036: #
1037: unless ($ENV{'request.state'} eq 'published') {
1038: $result=&inserteditinfo($result,$filecontents);
1039: }
1040:
1041: $request->print($result);
1042:
1043: writeallows($request->uri);
1044: return OK;
1045: }
1046:
1047: sub debug {
1048: if ($Apache::lonxml::debug eq 1) {
1049: print("DEBUG:".$_[0]."<br />\n");
1050: }
1051: }
1052:
1053: sub error {
1054: if (($Apache::lonxml::debug eq 1) || ($ENV{'request.state'} eq 'construct') ) {
1055: print "<b>ERROR:</b>".$_[0]."<br />\n";
1056: } else {
1057: print "<b>An Error occured while processing this resource. The instructor has been notified.</b> <br />";
1058: #notify author
1059: &Apache::lonmsg::author_res_msg($ENV{'request.filename'},$_[0]);
1060: #notify course
1061: if ( $ENV{'request.course.id'} ) {
1062: my $users=$ENV{'course.'.$ENV{'request.course.id'}.'.comment.email'};
1063: foreach my $user (split /\,/, $users) {
1064: ($user,my $domain) = split /:/, $user;
1065: &Apache::lonmsg::user_normal_msg($user,$domain,"Error in $ENV{'request.filename'}",$_[0]);
1066: }
1067: }
1068:
1069: #FIXME probably shouldn't have me get everything forever.
1070: &Apache::lonmsg::user_normal_msg('albertel','msu',"Error in $ENV{'request.filename'}",$_[0]);
1071: #&Apache::lonmsg::user_normal_msg('albertel','103',"Error in $ENV{'request.filename'}",$_[0]);
1072: }
1073: }
1074:
1075: sub warning {
1076: if ($ENV{'request.state'} eq 'construct') {
1077: print "<b>W</b>ARNING<b>:</b>".$_[0]."<br />\n";
1078: }
1079: }
1080:
1081: sub get_param {
1082: my ($param,$parstack,$safeeval,$context) = @_;
1083: if ( ! $context ) { $context = -1; }
1084: my $args ='';
1085: if ( $#$parstack > (-2-$context) ) { $args=$$parstack[$context]; }
1086: return &Apache::run::run("{$args;".'return $'.$param.'}',$safeeval); #'
1087: }
1088:
1089: sub register_insert {
1090: my @data = split /\n/, &Apache::lonnet::getfile('/home/httpd/lonTabs/insertlist.tab');
1091: my $i;
1092: my $tagnum=0;
1093: my @order;
1094: for ($i=0;$i < $#data; $i++) {
1095: my $line = $data[$i];
1096: if ( $line =~ /^\#/ || $line =~ /^\s*\n/) { next; }
1097: if ( $line =~ /TABLE/ ) { last; }
1098: my ($tag,$descrip,$color,$function,$show) = split(/,/, $line);
1099: $insertlist{"$tagnum.tag"} = $tag;
1100: $insertlist{"$tagnum.description"} = $descrip;
1101: $insertlist{"$tagnum.color"} = $color;
1102: $insertlist{"$tagnum.function"} = $function;
1103: $insertlist{"$tagnum.show"}= $show;
1104: $insertlist{"$tag.num"}=$tagnum;
1105: $tagnum++;
1106: }
1107: $i++; #skipping TABLE line
1108: $tagnum = 0;
1109: for (;$i < $#data;$i++) {
1110: my $line = $data[$i];
1111: my ($mnemonic,@which) = split(/ +/,$line);
1112: my $tag = $insertlist{"$tagnum.tag"};
1113: for (my $j=0;$j <$#which;$j++) {
1114: if ( $which[$j] eq 'Y' ) {
1115: if ($insertlist{"$j.show"} ne 'no') {
1116: push(@{ $insertlist{"$tag.which"} },$j);
1117: }
1118: }
1119: }
1120: $tagnum++;
1121: }
1122: }
1123:
1124: sub description {
1125: my ($token)=@_;
1126: return $insertlist{$insertlist{"$token->[1].num"}.'.description'};
1127: }
1128: 1;
1129: __END__
1130:
1131:
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