File:
[LON-CAPA] /
loncom /
xml /
lonxml.pm
Revision
1.131:
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Fri Sep 28 18:20:06 2001 UTC (22 years, 8 months ago) by
albertel
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CVS tags:
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- get_param, would serve up incorrect params, i.e. if the arguments exapmle="" wasn't defined but there still was a global variable name $example, it would server up the global variable instead.
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: # 8/7,8/9,8/10,8/11,8/15,8/16,8/17,8/18,8/20,8/23,8/24 Gerd Kortemeyer
17: # Guy Albertelli
18: # 9/26 Gerd Kortemeyer
19:
20:
21: package Apache::lonxml;
22: use vars
23: qw(@pwd @outputstack $redirection $import @extlinks $metamode $evaluate %insertlist @namespace);
24: use strict;
25: use HTML::TokeParser;
26: use HTML::TreeBuilder;
27: use Safe;
28: use Safe::Hole;
29: use Math::Cephes qw(:trigs :hypers :bessels erf erfc);
30: use Math::Random qw(:all);
31: use Opcode;
32:
33: sub register {
34: my $space;
35: my @taglist;
36: my $temptag;
37: ($space,@taglist) = @_;
38: foreach $temptag (@taglist) {
39: $Apache::lonxml::alltags{$temptag}=$space;
40: }
41: }
42:
43: use Apache::Constants qw(:common);
44: use Apache::lontexconvert;
45: use Apache::style;
46: use Apache::run;
47: use Apache::londefdef;
48: use Apache::scripttag;
49: use Apache::edit;
50: use Apache::lonnet;
51: use Apache::File;
52:
53: #================================================== Main subroutine: xmlparse
54: #debugging control, to turn on debugging modify the correct handler
55: $Apache::lonxml::debug=0;
56:
57: #path to the directory containing the file currently being processed
58: @pwd=();
59:
60: #these two are used for capturing a subset of the output for later processing,
61: #don't touch them directly use &startredirection and &endredirection
62: @outputstack = ();
63: $redirection = 0;
64:
65: #controls wheter the <import> tag actually does
66: $import = 1;
67: @extlinks=();
68:
69: # meta mode is a bit weird only some output is to be turned off
70: #<output> tag turns metamode off (defined in londefdef.pm)
71: $metamode = 0;
72:
73: # turns on and of run::evaluate actually derefencing var refs
74: $evaluate = 1;
75:
76: # data structure for eidt mode, determines what tags can go into what other tags
77: %insertlist=();
78:
79: # stores the list of active tag namespaces
80: @namespace=();
81:
82: # has the dynamic menu been updated to know about this resource
83: $Apache::lonxml::registered=0;
84:
85: sub xmlbegin {
86: my $output='';
87: if ($ENV{'browser.mathml'}) {
88: $output='<?xml version="1.0"?>'
89: .'<?xml-stylesheet type="text/css" href="/adm/MathML/mathml.css"?>'
90: .'<!DOCTYPE html SYSTEM "/adm/MathML/mathml.dtd" '
91: .'[<!ENTITY mathns "http://www.w3.org/1998/Math/MathML">]>'
92: .'<html xmlns:math="http://www.w3.org/1998/Math/MathML" '
93: .'xmlns="http://www.w3.org/TR/REC-html40">';
94: } else {
95: $output='<html>';
96: }
97: return $output;
98: }
99:
100: sub xmlend {
101: my $discussion='';
102: if ($ENV{'request.course.id'}) {
103: my $crs='/'.$ENV{'request.course.id'};
104: if ($ENV{'request.course.sec'}) {
105: $crs.='_'.$ENV{'request.course.sec'};
106: }
107: $crs=~s/\_/\//g;
108: my $seeid=&Apache::lonnet::allowed('rin',$crs);
109: my $symb=&Apache::lonnet::symbread();
110: if ($symb) {
111: my %contrib=&Apache::lonnet::restore($symb,$ENV{'request.course.id'},
112: $ENV{'course.'.$ENV{'request.course.id'}.'.domain'},
113: $ENV{'course.'.$ENV{'request.course.id'}.'.num'});
114: if ($contrib{'version'}) {
115: $discussion.=
116: '<address><hr /><h2>Course Discussion of Resource</h2>';
117: my $idx;
118: for ($idx=1;$idx<=$contrib{'version'};$idx++) {
119: my $hidden=($contrib{'hidden'}=~/\.$idx\./);
120: unless (($hidden) && (!$seeid)) {
121: my $message=$contrib{$idx.':message'};
122: $message=~s/\n/\<br \/\>/g;
123: if ($message) {
124: if ($hidden) {
125: $message='<font color="#888888">'.$message.'</font>';
126: }
127: my $sender='Anonymous';
128: if ((!$contrib{$idx.':anonymous'}) || ($seeid)) {
129: $sender=$contrib{$idx.':sendername'}.' at '.
130: $contrib{$idx.':senderdomain'};
131: if ($contrib{$idx.':anonymous'}) {
132: $sender.=' (anonymous)';
133: }
134: if ($seeid) {
135: if ($hidden) {
136: $sender.=' <a href="/adm/feedback?unhide='.
137: $symb.':::'.$idx.'">Make Visible</a>';
138: } else {
139: $sender.=' <a href="/adm/feedback?hide='.
140: $symb.':::'.$idx.'">Hide</a>';
141: }
142: }
143: }
144: $discussion.='<p><b>'.$sender.'</b> ('.
145: localtime($contrib{$idx.':timestamp'}).
146: '):<blockquote>'.$message.
147: '</blockquote></p>';
148: }
149: }
150: }
151: $discussion.='</address>';
152: }
153: }
154: }
155: return $discussion.'</html>';
156: }
157:
158: sub tokeninputfield {
159: my $defhost=$Apache::lonnet::perlvar{'lonHostID'};
160: $defhost=~tr/a-z/A-Z/;
161: return (<<ENDINPUTFIELD)
162: <script>
163: function updatetoken() {
164: var comp=new Array;
165: var barcode=unescape(document.tokeninput.barcode.value);
166: comp=barcode.split('*');
167: if (typeof(comp[0])!="undefined") {
168: document.tokeninput.codeone.value=comp[0];
169: }
170: if (typeof(comp[1])!="undefined") {
171: document.tokeninput.codetwo.value=comp[1];
172: }
173: if (typeof(comp[2])!="undefined") {
174: comp[2]=comp[2].toUpperCase();
175: document.tokeninput.codethree.value=comp[2];
176: }
177: document.tokeninput.barcode.value='';
178: }
179: </script>
180: <form method="post" name="tokeninput">
181: <table border="2" bgcolor="#FFFFBB">
182: <tr><th>DocID Checkin</th></tr>
183: <tr><td>
184: <table>
185: <tr>
186: <td>Scan in Barcode</td>
187: <td><input type="text" size="22" name="barcode"
188: onChange="updatetoken()"/></td>
189: </tr>
190: <tr><td><i>or</i> Type in DocID</td>
191: <td>
192: <input type="text" size="5" name="codeone" />
193: <b><font size="+2">*</font></b>
194: <input type="text" size="5" name="codetwo" />
195: <b><font size="+2">*</font></b>
196: <input type="text" size="10" name="codethree" value="$defhost"
197: onChange="this.value=this.value.toUpperCase()" />
198: </td></tr>
199: </table>
200: </td></tr>
201: <tr><td><input type="submit" value="Check in DocID" /></td></tr>
202: </table>
203: </form>
204: ENDINPUTFIELD
205: }
206:
207: sub maketoken {
208: my ($symb,$tuname,$tudom,$tcrsid)=@_;
209: unless ($symb) {
210: $symb=&Apache::lonnet::symbread();
211: }
212: unless ($tuname) {
213: $tuname=$ENV{'user.name'};
214: $tudom=$ENV{'user.domain'};
215: $tcrsid=$ENV{'request.course.id'};
216: }
217:
218: return &Apache::lonnet::checkout($symb,$tuname,$tudom,$tcrsid);
219: }
220:
221: sub printtokenheader {
222: my ($target,$token,$symb,$tuname,$tudom,$tcrsid)=@_;
223: unless ($token) { return ''; }
224:
225: unless ($symb) {
226: $symb=&Apache::lonnet::symbread();
227: }
228: unless ($tuname) {
229: $tuname=$ENV{'user.name'};
230: $tudom=$ENV{'user.domain'};
231: $tcrsid=$ENV{'request.course.id'};
232: }
233:
234: my %reply=&Apache::lonnet::get('environment',
235: ['firstname','middlename','lastname','generation'],
236: $tudom,$tuname);
237: my $plainname=$reply{'firstname'}.' '.
238: $reply{'middlename'}.' '.
239: $reply{'lastname'}.' '.
240: $reply{'generation'};
241:
242: if ($target eq 'web') {
243: return
244: '<img align="right" src="/cgi-bin/barcode.gif?encode='.$token.'" />'.
245: 'Checked out for '.$plainname.
246: '<br />User: '.$tuname.' at '.$tudom.
247: '<br />CourseID: '.$tcrsid.
248: '<br />DocID: '.$token.
249: '<br />Time: '.localtime().'<hr />';
250: } else {
251: return $token;
252: }
253: }
254:
255: sub fontsettings() {
256: my $headerstring='';
257: if (($ENV{'browser.os'} eq 'mac') && (!$ENV{'browser.mathml'})) {
258: $headerstring.=
259: '<meta Content-Type="text/html; charset=x-mac-roman">';
260: }
261: return $headerstring;
262: }
263:
264: sub registerurl {
265: my $forcereg=shift;
266: if ($ENV{'request.publicaccess'}) {
267: return
268: '<script>function LONCAPAreg(){} function LONCAPAstale(){}</script>';
269: }
270: if ($Apache::lonxml::registered && !$forcereg) { return ''; }
271: $Apache::lonxml::registered=1;
272: if (($ENV{'REQUEST_URI'}!~/^\/(res\/)*adm\//) || ($forcereg)) {
273: my $hwkadd='';
274: if ($ENV{'REQUEST_URI'}=~/\.(problem|exam|quiz|assess|survey|form)$/) {
275: if (&Apache::lonnet::allowed('vgr',$ENV{'request.course.id'})) {
276: $hwkadd.=(<<ENDSUBM);
277: menu.switchbutton
278: (7,1,'subm.gif','view sub','missions',
279: 'gocmd("/adm/grades","submission")');
280: ENDSUBM
281: }
282: if (&Apache::lonnet::allowed('mgr',$ENV{'request.course.id'})) {
283: $hwkadd.=(<<ENDGRDS);
284: menu.switchbutton
285: (7,2,'pgrd.gif','problem','grades',
286: 'gocmd("/adm/grades","viewgrades")');
287: ENDGRDS
288: }
289: if (&Apache::lonnet::allowed('opa',$ENV{'request.course.id'})) {
290: $hwkadd.=(<<ENDPARM);
291: menu.switchbutton
292: (7,3,'pparm.gif','problem','parms',
293: 'gocmd("/adm/parmset","set")');
294: ENDPARM
295: }
296: }
297: return (<<ENDREGTHIS);
298:
299: <script language="JavaScript">
300: // BEGIN LON-CAPA Internal
301:
302: function LONCAPAreg() {
303: menu=window.open("","LONCAPAmenu");
304: menu.clearTimeout(menu.menucltim);
305: menu.currentURL=window.location.pathname;
306: menu.currentStale=0;
307: menu.clearbut(3,1);
308: menu.switchbutton
309: (6,3,'catalog.gif','catalog','info','catalog_info()');
310: menu.switchbutton
311: (8,1,'eval.gif','evaluate','this','gopost("/adm/evaluate",currentURL)');
312: menu.switchbutton
313: (8,2,'fdbk.gif','feedback','on this','gopost("/adm/feedback",currentURL)');
314: menu.switchbutton
315: (8,3,'prt.gif','prepare','printout','gopost("/adm/printout",currentURL)');
316: menu.switchbutton
317: (2,1,'back.gif','backward','','gopost("/adm/flip","back:"+currentURL)');
318: menu.switchbutton
319: (2,3,'forw.gif','forward','','gopost("/adm/flip","forward:"+currentURL)');
320: menu.switchbutton
321: (9,1,'sbkm.gif','set','bookmark','set_bookmark()');
322: menu.switchbutton
323: (9,2,'vbkm.gif','view','bookmark','edit_bookmarks()');
324: menu.switchbutton
325: (9,3,'anot.gif','anno-','tations','annotate()');
326: $hwkadd
327: }
328:
329: function LONCAPAstale() {
330: menu=window.open("","LONCAPAmenu");
331: menu.currentStale=1;
332: menu.switchbutton
333: (3,1,'reload.gif','return','location','go(currentURL)');
334: menu.clearbut(7,1);
335: menu.clearbut(7,2);
336: menu.clearbut(7,3);
337: menu.menucltim=menu.setTimeout(
338: 'clearbut(2,1);clearbut(2,3);clearbut(8,1);clearbut(8,2);clearbut(8,3);'+
339: 'clearbut(9,1);clearbut(9,2);clearbut(9,3);clearbut(6,3)',
340: 2000);
341:
342: }
343:
344: // END LON-CAPA Internal
345: </script>
346: ENDREGTHIS
347:
348: } else {
349: return (<<ENDDONOTREGTHIS);
350:
351: <script language="JavaScript">
352: // BEGIN LON-CAPA Internal
353:
354: function LONCAPAreg() {
355: menu=window.open("","LONCAPAmenu");
356: menu.currentStale=1;
357: menu.clearbut(2,1);
358: menu.clearbut(2,3);
359: menu.clearbut(8,1);
360: menu.clearbut(8,2);
361: menu.clearbut(8,3);
362: if (menu.currentURL) {
363: menu.switchbutton
364: (3,1,'reload.gif','return','location','go(currentURL)');
365: } else {
366: menu.clearbut(3,1);
367: }
368: }
369:
370: function LONCAPAstale() {
371: }
372:
373: // END LON-CAPA Internal
374: </script>
375: ENDDONOTREGTHIS
376:
377: }
378: }
379:
380: sub loadevents() {
381: return 'LONCAPAreg();';
382: }
383:
384: sub unloadevents() {
385: return 'LONCAPAstale();';
386: }
387:
388: sub printalltags {
389: my $temp;
390: foreach $temp (sort keys %Apache::lonxml::alltags) {
391: &Apache::lonxml::debug("$temp -- $Apache::lonxml::alltags{$temp}");
392: }
393: }
394:
395: sub xmlparse {
396: my ($target,$content_file_string,$safeinit,%style_for_target) = @_;
397:
398: &setup_globals($target);
399: #&printalltags();
400: my @pars = ();
401: my $pwd=$ENV{'request.filename'};
402: $pwd =~ s:/[^/]*$::;
403: &newparser(\@pars,\$content_file_string,$pwd);
404:
405: my $safeeval = new Safe;
406: my $safehole = new Safe::Hole;
407: &init_safespace($target,$safeeval,$safehole,$safeinit);
408: #-------------------- Redefinition of the target in the case of compound target
409:
410: ($target, my @tenta) = split('&&',$target);
411:
412: my @stack = ();
413: my @parstack = ();
414: &initdepth;
415:
416: my $finaloutput = &inner_xmlparse($target,\@stack,\@parstack,\@pars,
417: $safeeval,\%style_for_target);
418: if ($ENV{'request.uri'}) {
419: &writeallows($ENV{'request.uri'});
420: }
421: return $finaloutput;
422: }
423:
424: sub htmlclean {
425: my ($raw,$full)=@_;
426:
427: my $tree = HTML::TreeBuilder->new;
428: $tree->ignore_unknown(0);
429:
430: $tree->parse($raw);
431:
432: my $output= $tree->as_HTML(undef,' ');
433:
434: $output=~s/\<(br|hr|img|meta|allow)([^\>\/]*)\>/\<$1$2 \/\>/gis;
435: $output=~s/\<\/(br|hr|img|meta|allow)\>//gis;
436: unless ($full) {
437: $output=~s/\<[\/]*(body|head|html)\>//gis;
438: }
439:
440: $tree = $tree->delete;
441:
442: return $output;
443: }
444:
445: sub inner_xmlparse {
446: my ($target,$stack,$parstack,$pars,$safeeval,$style_for_target)=@_;
447: my $finaloutput = '';
448: my $result;
449: my $token;
450: while ( $#$pars > -1 ) {
451: while ($token = $$pars['-1']->get_token) {
452: if (($token->[0] eq 'T') || ($token->[0] eq 'C') || ($token->[0] eq 'D') ) {
453: if ($metamode<1) {
454: $result=$token->[1];
455: }
456: } elsif ($token->[0] eq 'PI') {
457: if ($metamode<1) {
458: $result=$token->[2];
459: }
460: } elsif ($token->[0] eq 'S') {
461: # add tag to stack
462: push (@$stack,$token->[1]);
463: # add parameters list to another stack
464: push (@$parstack,&parstring($token));
465: &increasedepth($token);
466: if (exists $$style_for_target{$token->[1]}) {
467: if ($Apache::lonxml::redirection) {
468: $Apache::lonxml::outputstack['-1'] .=
469: &recurse($$style_for_target{$token->[1]},$target,$safeeval,
470: $style_for_target,@$parstack);
471: } else {
472: $finaloutput .= &recurse($$style_for_target{$token->[1]},$target,
473: $safeeval,$style_for_target,@$parstack);
474: }
475: } else {
476: $result = &callsub("start_$token->[1]", $target, $token, $stack,
477: $parstack, $pars, $safeeval, $style_for_target);
478: }
479: } elsif ($token->[0] eq 'E') {
480: #clear out any tags that didn't end
481: while ($token->[1] ne $$stack['-1'] && ($#$stack > -1)) {
482: &Apache::lonxml::warning("Unbalanced tags in resource $$stack['-1']");
483: &end_tag($stack,$parstack,$token);
484: }
485:
486: if (exists $$style_for_target{'/'."$token->[1]"}) {
487: if ($Apache::lonxml::redirection) {
488: $Apache::lonxml::outputstack['-1'] .=
489: &recurse($$style_for_target{'/'."$token->[1]"},
490: $target,$safeeval,$style_for_target,@$parstack);
491: } else {
492: $finaloutput .= &recurse($$style_for_target{'/'."$token->[1]"},
493: $target,$safeeval,$style_for_target,
494: @$parstack);
495: }
496:
497: } else {
498: $result = &callsub("end_$token->[1]", $target, $token, $stack,
499: $parstack, $pars,$safeeval, $style_for_target);
500: }
501: } else {
502: &Apache::lonxml::error("Unknown token event :$token->[0]:$token->[1]:");
503: }
504: #evaluate variable refs in result
505: if ($result ne "") {
506: if ( $#$parstack > -1 ) {
507: if ($Apache::lonxml::redirection) {
508: $Apache::lonxml::outputstack['-1'] .=
509: &Apache::run::evaluate($result,$safeeval,$$parstack['-1']);
510: } else {
511: $finaloutput .= &Apache::run::evaluate($result,$safeeval,
512: $$parstack['-1']);
513: }
514: } else {
515: $finaloutput .= &Apache::run::evaluate($result,$safeeval,'');
516: }
517: $result = '';
518: }
519: if ($token->[0] eq 'E') {
520: &end_tag($stack,$parstack,$token);
521: }
522: }
523: pop @$pars;
524: pop @Apache::lonxml::pwd;
525: }
526:
527: # if ($target eq 'meta') {
528: # $finaloutput.=&endredirection;
529: # }
530:
531: if (($ENV{'QUERY_STRING'}) && ($target eq 'web')) {
532: $finaloutput=&afterburn($finaloutput);
533: }
534: return $finaloutput;
535: }
536:
537: sub recurse {
538: my @innerstack = ();
539: my @innerparstack = ();
540: my ($newarg,$target,$safeeval,$style_for_target,@parstack) = @_;
541: my @pat = ();
542: &newparser(\@pat,\$newarg);
543: my $tokenpat;
544: my $partstring = '';
545: my $output='';
546: my $decls='';
547: while ( $#pat > -1 ) {
548: while ($tokenpat = $pat[$#pat]->get_token) {
549: if (($tokenpat->[0] eq 'T') || ($tokenpat->[0] eq 'C') || ($tokenpat->[0] eq 'D') ) {
550: if ($metamode<1) { $partstring=$tokenpat->[1]; }
551: } elsif ($tokenpat->[0] eq 'PI') {
552: if ($metamode<1) { $partstring=$tokenpat->[2]; }
553: } elsif ($tokenpat->[0] eq 'S') {
554: push (@innerstack,$tokenpat->[1]);
555: push (@innerparstack,&parstring($tokenpat));
556: &increasedepth($tokenpat);
557: $partstring = &callsub("start_$tokenpat->[1]", $target, $tokenpat,
558: \@innerstack, \@innerparstack, \@pat,
559: $safeeval, $style_for_target);
560: } elsif ($tokenpat->[0] eq 'E') {
561: #clear out any tags that didn't end
562: while ($tokenpat->[1] ne $innerstack[$#innerstack]
563: && ($#innerstack > -1)) {
564: &Apache::lonxml::warning("Unbalanced tags in resource $innerstack['-1']");
565: &end_tag(\@innerstack,\@innerparstack,$tokenpat);
566: }
567: $partstring = &callsub("end_$tokenpat->[1]", $target, $tokenpat,
568: \@innerstack, \@innerparstack, \@pat,
569: $safeeval, $style_for_target);
570: } else {
571: &Apache::lonxml::error("Unknown token event :$tokenpat->[0]:$tokenpat->[1]:");
572: }
573: #pass both the variable to the style tag, and the tag we
574: #are processing inside the <definedtag>
575: if ( $partstring ne "" ) {
576: if ( $#parstack > -1 ) {
577: if ( $#innerparstack > -1 ) {
578: $decls= $parstack[$#parstack].$innerparstack[$#innerparstack];
579: } else {
580: $decls= $parstack[$#parstack];
581: }
582: } else {
583: if ( $#innerparstack > -1 ) {
584: $decls=$innerparstack[$#innerparstack];
585: } else {
586: $decls='';
587: }
588: }
589: $output .= &Apache::run::evaluate($partstring,$safeeval,$decls);
590: $partstring = '';
591: }
592: if ($tokenpat->[0] eq 'E') { pop @innerstack;pop @innerparstack;
593: &decreasedepth($tokenpat);}
594: }
595: pop @pat;
596: pop @Apache::lonxml::pwd;
597: }
598: return $output;
599: }
600:
601: sub callsub {
602: my ($sub,$target,$token,$tagstack,$parstack,$parser,$safeeval,$style)=@_;
603: my $currentstring='';
604: my $nodefault;
605: {
606: my $sub1;
607: no strict 'refs';
608: my $tag=$token->[1];
609: my $space=$Apache::lonxml::alltags{$tag};
610: if (!$space) {
611: $tag=~tr/A-Z/a-z/;
612: $sub=~tr/A-Z/a-z/;
613: $space=$Apache::lonxml::alltags{$tag}
614: }
615:
616: my $deleted=0;
617: $Apache::lonxml::curdepth=join('_',@Apache::lonxml::depthcounter);
618: if (($token->[0] eq 'S') && ($target eq 'modified')) {
619: $deleted=&Apache::edit::handle_delete($space,$target,$token,$tagstack,
620: $parstack,$parser,$safeeval,
621: $style);
622: }
623: if (!$deleted) {
624: if ($space) {
625: #&Apache::lonxml::debug("Calling sub $sub in $space $metamode<br />\n");
626: $sub1="$space\:\:$sub";
627: ($currentstring,$nodefault) = &$sub1($target,$token,$tagstack,
628: $parstack,$parser,$safeeval,
629: $style);
630: } else {
631: #&Apache::lonxml::debug("NOT Calling sub $sub in $space $metamode<br />\n");
632: if ($metamode <1) {
633: if (defined($token->[4]) && ($metamode < 1)) {
634: $currentstring = $token->[4];
635: } else {
636: $currentstring = $token->[2];
637: }
638: }
639: }
640: # &Apache::lonxml::debug("nodefalt:$nodefault:");
641: if ($currentstring eq '' && $nodefault eq '') {
642: if ($target eq 'edit') {
643: &Apache::lonxml::debug("doing default edit for $token->[1]");
644: if ($token->[0] eq 'S') {
645: $currentstring = &Apache::edit::tag_start($target,$token);
646: } elsif ($token->[0] eq 'E') {
647: $currentstring = &Apache::edit::tag_end($target,$token);
648: }
649: } elsif ($target eq 'modified') {
650: if ($token->[0] eq 'S') {
651: $currentstring = $token->[4];
652: $currentstring.=&Apache::edit::handle_insert();
653: } else {
654: $currentstring = $token->[2];
655: }
656: }
657: }
658: }
659: use strict 'refs';
660: }
661: return $currentstring;
662: }
663:
664: sub setup_globals {
665: my ($target)=@_;
666: $Apache::lonxml::registered = 0;
667: @Apache::lonxml::pwd=();
668: @Apache::lonxml::extlinks=();
669: if ($target eq 'meta') {
670: $Apache::lonxml::redirection = 0;
671: $Apache::lonxml::metamode = 1;
672: $Apache::lonxml::evaluate = 1;
673: $Apache::lonxml::import = 0;
674: } elsif ($target eq 'answer') {
675: $Apache::lonxml::redirection = 0;
676: $Apache::lonxml::metamode = 1;
677: $Apache::lonxml::evaluate = 1;
678: $Apache::lonxml::import = 1;
679: } elsif ($target eq 'grade') {
680: &startredirection;
681: $Apache::lonxml::metamode = 0;
682: $Apache::lonxml::evaluate = 1;
683: $Apache::lonxml::import = 1;
684: } elsif ($target eq 'modified') {
685: $Apache::lonxml::redirection = 0;
686: $Apache::lonxml::metamode = 0;
687: $Apache::lonxml::evaluate = 0;
688: $Apache::lonxml::import = 0;
689: } elsif ($target eq 'edit') {
690: $Apache::lonxml::redirection = 0;
691: $Apache::lonxml::metamode = 0;
692: $Apache::lonxml::evaluate = 0;
693: $Apache::lonxml::import = 0;
694: } else {
695: $Apache::lonxml::redirection = 0;
696: $Apache::lonxml::metamode = 0;
697: $Apache::lonxml::evaluate = 1;
698: $Apache::lonxml::import = 1;
699: }
700: }
701:
702: sub init_safespace {
703: my ($target,$safeeval,$safehole,$safeinit) = @_;
704: $safeeval->permit("entereval");
705: $safeeval->permit(":base_math");
706: $safeeval->permit("sort");
707: $safeeval->deny(":base_io");
708: $safehole->wrap(\&Apache::scripttag::xmlparse,$safeeval,'&xmlparse');
709: $safehole->wrap(\&Apache::lonnet::EXT,$safeeval,'&EXT');
710:
711: $safehole->wrap(\&Math::Cephes::asin,$safeeval,'&asin');
712: $safehole->wrap(\&Math::Cephes::acos,$safeeval,'&acos');
713: $safehole->wrap(\&Math::Cephes::atan,$safeeval,'&atan');
714: $safehole->wrap(\&Math::Cephes::sinh,$safeeval,'&sinh');
715: $safehole->wrap(\&Math::Cephes::cosh,$safeeval,'&cosh');
716: $safehole->wrap(\&Math::Cephes::tanh,$safeeval,'&tanh');
717: $safehole->wrap(\&Math::Cephes::asinh,$safeeval,'&asinh');
718: $safehole->wrap(\&Math::Cephes::acosh,$safeeval,'&acosh');
719: $safehole->wrap(\&Math::Cephes::atanh,$safeeval,'&atanh');
720: $safehole->wrap(\&Math::Cephes::erf,$safeeval,'&erf');
721: $safehole->wrap(\&Math::Cephes::erfc,$safeeval,'&erfc');
722: $safehole->wrap(\&Math::Cephes::j0,$safeeval,'&j0');
723: $safehole->wrap(\&Math::Cephes::j1,$safeeval,'&j1');
724: $safehole->wrap(\&Math::Cephes::jn,$safeeval,'&jn');
725: $safehole->wrap(\&Math::Cephes::jv,$safeeval,'&jv');
726: $safehole->wrap(\&Math::Cephes::y0,$safeeval,'&y0');
727: $safehole->wrap(\&Math::Cephes::y1,$safeeval,'&y1');
728: $safehole->wrap(\&Math::Cephes::yn,$safeeval,'&yn');
729: $safehole->wrap(\&Math::Cephes::yv,$safeeval,'&yv');
730: $safehole->wrap(\&Math::Random::random_beta,$safeeval,'&math_random_beta');
731: $safehole->wrap(\&Math::Random::random_chi_square,$safeeval,'&math_random_chi_square');
732: $safehole->wrap(\&Math::Random::random_exponential,$safeeval,'&math_random_exponential');
733: $safehole->wrap(\&Math::Random::random_f,$safeeval,'&math_random_f');
734: $safehole->wrap(\&Math::Random::random_gamma,$safeeval,'&math_random_gamma');
735: $safehole->wrap(\&Math::Random::random_multivariate_normal,$safeeval,'&math_random_multivariate_normal');
736: $safehole->wrap(\&Math::Random::random_multinomial,$safeeval,'&math_random_multinomial');
737: $safehole->wrap(\&Math::Random::random_noncentral_chi_square,$safeeval,'&math_random_noncentral_chi_square');
738: $safehole->wrap(\&Math::Random::random_noncentral_f,$safeeval,'&math_random_noncentral_f');
739: $safehole->wrap(\&Math::Random::random_normal,$safeeval,'&math_random_normal');
740: $safehole->wrap(\&Math::Random::random_permutation,$safeeval,'&math_random_permutation');
741: $safehole->wrap(\&Math::Random::random_permuted_index,$safeeval,'&math_random_permuted_index');
742: $safehole->wrap(\&Math::Random::random_uniform,$safeeval,'&math_random_uniform');
743: $safehole->wrap(\&Math::Random::random_poisson,$safeeval,'&math_random_poisson');
744: $safehole->wrap(\&Math::Random::random_uniform_integer,$safeeval,'&math_random_uniform_integer');
745: $safehole->wrap(\&Math::Random::random_negative_binomial,$safeeval,'&math_random_negative_binomial');
746: $safehole->wrap(\&Math::Random::random_binomial,$safeeval,'&math_random_binomial');
747: $safehole->wrap(\&Math::Random::random_seed_from_phrase,$safeeval,'&random_seed_from_phrase');
748: $safehole->wrap(\&Math::Random::random_set_seed_from_phrase,$safeeval,'&random_set_seed_from_phrase');
749: $safehole->wrap(\&Math::Random::random_get_seed,$safeeval,'&random_get_seed');
750: $safehole->wrap(\&Math::Random::random_set_seed,$safeeval,'&random_set_seed');
751:
752: #need to inspect this class of ops
753: # $safeeval->deny(":base_orig");
754: $safeinit .= ';$external::target="'.$target.'";';
755: my $rndseed;
756: my ($symb,$courseid,$domain,$name) = &Apache::lonxml::whichuser();
757: $rndseed=&Apache::lonnet::rndseed($symb,$courseid,$domain,$name);
758: $safeinit .= ';$external::randomseed='.$rndseed.';';
759: &Apache::run::run($safeinit,$safeeval);
760: }
761:
762: sub startredirection {
763: $Apache::lonxml::redirection++;
764: push (@Apache::lonxml::outputstack, '');
765: }
766:
767: sub endredirection {
768: if (!$Apache::lonxml::redirection) {
769: &Apache::lonxml::error("Endredirection was called, before a startredirection, perhaps you have unbalanced tags. Some debuging information:".join ":",caller);
770: return '';
771: }
772: $Apache::lonxml::redirection--;
773: pop @Apache::lonxml::outputstack;
774: }
775:
776: sub end_tag {
777: my ($tagstack,$parstack,$token)=@_;
778: pop(@$tagstack);
779: pop(@$parstack);
780: &decreasedepth($token);
781: }
782:
783: sub initdepth {
784: @Apache::lonxml::depthcounter=();
785: $Apache::lonxml::depth=-1;
786: $Apache::lonxml::olddepth=-1;
787: }
788:
789: sub increasedepth {
790: my ($token) = @_;
791: $Apache::lonxml::depth++;
792: $Apache::lonxml::depthcounter[$Apache::lonxml::depth]++;
793: if ($Apache::lonxml::depthcounter[$Apache::lonxml::depth]==1) {
794: $Apache::lonxml::olddepth=$Apache::lonxml::depth;
795: }
796: my $curdepth=join('_',@Apache::lonxml::depthcounter);
797: &Apache::lonxml::debug("s $Apache::lonxml::depth : $Apache::lonxml::olddepth : $curdepth : $token->[1]\n");
798: #print "<br />s $Apache::lonxml::depth : $Apache::lonxml::olddepth : $curdepth : $token->[1]\n";
799: }
800:
801: sub decreasedepth {
802: my ($token) = @_;
803: $Apache::lonxml::depth--;
804: if ($Apache::lonxml::depth<$Apache::lonxml::olddepth-1) {
805: $#Apache::lonxml::depthcounter--;
806: $Apache::lonxml::olddepth=$Apache::lonxml::depth+1;
807: }
808: if ( $Apache::lonxml::depth < -1) {
809: &Apache::lonxml::warning("Unbalanced tags in resource");
810: $Apache::lonxml::depth='-1';
811: }
812: my $curdepth=join('_',@Apache::lonxml::depthcounter);
813: &Apache::lonxml::debug("e $Apache::lonxml::depth : $Apache::lonxml::olddepth : $token->[1] : $curdepth\n");
814: #print "<br />e $Apache::lonxml::depth : $Apache::lonxml::olddepth : $token->[1] : $curdepth\n";
815: }
816:
817: sub get_all_text {
818:
819: my($tag,$pars)= @_;
820: my $depth=0;
821: my $token;
822: my $result='';
823: if ( $tag =~ m:^/: ) {
824: my $tag=substr($tag,1);
825: # &Apache::lonxml::debug("have:$tag:");
826: while (($depth >=0) && ($token = $pars->get_token)) {
827: # &Apache::lonxml::debug("e token:$token->[0]:$depth:$token->[1]");
828: if (($token->[0] eq 'T')||($token->[0] eq 'C')||($token->[0] eq 'D')) {
829: $result.=$token->[1];
830: } elsif ($token->[0] eq 'PI') {
831: $result.=$token->[2];
832: } elsif ($token->[0] eq 'S') {
833: if ($token->[1] eq $tag) { $depth++; }
834: $result.=$token->[4];
835: } elsif ($token->[0] eq 'E') {
836: if ( $token->[1] eq $tag) { $depth--; }
837: #skip sending back the last end tag
838: if ($depth > -1) { $result.=$token->[2]; } else {
839: $pars->unget_token($token);
840: }
841: }
842: }
843: } else {
844: while ($token = $pars->get_token) {
845: # &Apache::lonxml::debug("s token:$token->[0]:$depth:$token->[1]");
846: if (($token->[0] eq 'T')||($token->[0] eq 'C')||($token->[0] eq 'D')) {
847: $result.=$token->[1];
848: } elsif ($token->[0] eq 'PI') {
849: $result.=$token->[2];
850: } elsif ($token->[0] eq 'S') {
851: if ( $token->[1] eq $tag) {
852: $pars->unget_token($token); last;
853: } else {
854: $result.=$token->[4];
855: }
856: } elsif ($token->[0] eq 'E') {
857: $result.=$token->[2];
858: }
859: }
860: }
861: # &Apache::lonxml::debug("Exit:$result:");
862: return $result
863: }
864:
865: sub newparser {
866: my ($parser,$contentref,$dir) = @_;
867: push (@$parser,HTML::TokeParser->new($contentref));
868: $$parser['-1']->xml_mode('1');
869: if ( $dir eq '' ) {
870: push (@Apache::lonxml::pwd, $Apache::lonxml::pwd[$#Apache::lonxml::pwd]);
871: } else {
872: push (@Apache::lonxml::pwd, $dir);
873: }
874: # &Apache::lonxml::debug("pwd:$#Apache::lonxml::pwd");
875: # &Apache::lonxml::debug("pwd:$Apache::lonxml::pwd[$#Apache::lonxml::pwd]");
876: }
877:
878: sub parstring {
879: my ($token) = @_;
880: my $temp='';
881: map {
882: unless ($_=~/\W/) {
883: my $val=$token->[2]->{$_};
884: $val =~ s/([\%\@\\])/\\$1/g;
885: #if ($val =~ m/^[\%\@]/) { $val="\\".$val; }
886: $temp .= "my \$$_=\"$val\";"
887: }
888: } @{$token->[3]};
889: return $temp;
890: }
891:
892: sub writeallows {
893: unless ($#extlinks>=0) { return; }
894: my $thisurl='/res/'.&Apache::lonnet::declutter(shift);
895: if ($ENV{'httpref.'.$thisurl}) {
896: $thisurl=$ENV{'httpref.'.$thisurl};
897: }
898: my $thisdir=$thisurl;
899: $thisdir=~s/\/[^\/]+$//;
900: my %httpref=();
901: map {
902: $httpref{'httpref.'.
903: &Apache::lonnet::hreflocation($thisdir,$_)}=$thisurl;
904: } @extlinks;
905: @extlinks=();
906: &Apache::lonnet::appenv(%httpref);
907: }
908:
909: #
910: # Afterburner handles anchors, highlights and links
911: #
912: sub afterburn {
913: my $result=shift;
914: map {
915: my ($name, $value) = split(/=/,$_);
916: $value =~ tr/+/ /;
917: $value =~ s/%([a-fA-F0-9][a-fA-F0-9])/pack("C",hex($1))/eg;
918: if (($name eq 'highlight')||($name eq 'anchor')||($name eq 'link')) {
919: unless ($ENV{'form.'.$name}) {
920: $ENV{'form.'.$name}=$value;
921: }
922: }
923: } (split(/&/,$ENV{'QUERY_STRING'}));
924: if ($ENV{'form.highlight'}) {
925: map {
926: my $anchorname=$_;
927: my $matchthis=$anchorname;
928: $matchthis=~s/\_+/\\s\+/g;
929: $result=~s/($matchthis)/\<font color=\"red\"\>$1\<\/font\>/gs;
930: } split(/\,/,$ENV{'form.highlight'});
931: }
932: if ($ENV{'form.link'}) {
933: map {
934: my ($anchorname,$linkurl)=split(/\>/,$_);
935: my $matchthis=$anchorname;
936: $matchthis=~s/\_+/\\s\+/g;
937: $result=~s/($matchthis)/\<a href=\"$linkurl\"\>$1\<\/a\>/gs;
938: } split(/\,/,$ENV{'form.link'});
939: }
940: if ($ENV{'form.anchor'}) {
941: my $anchorname=$ENV{'form.anchor'};
942: my $matchthis=$anchorname;
943: $matchthis=~s/\_+/\\s\+/g;
944: $result=~s/($matchthis)/\<a name=\"$anchorname\"\>$1\<\/a\>/s;
945: $result.=(<<"ENDSCRIPT");
946: <script>
947: document.location.hash='$anchorname';
948: </script>
949: ENDSCRIPT
950: }
951: return $result;
952: }
953:
954: sub storefile {
955: my ($file,$contents)=@_;
956: if (my $fh=Apache::File->new('>'.$file)) {
957: print $fh $contents;
958: $fh->close();
959: }
960: }
961:
962: sub inserteditinfo {
963: my ($result,$filecontents)=@_;
964: unless ($filecontents) {
965: $filecontents=(<<SIMPLECONTENT);
966: <html>
967: <head>
968: <title>
969: Title of Document Goes Here
970: </title>
971: </head>
972: <body bgcolor="#FFFFFF">
973:
974: Body of Document Goes Here
975:
976: </body>
977: </html>
978: SIMPLECONTENT
979: }
980: my $editheader='<a href="#editsection">Edit below</a><hr />';
981: my $editfooter=(<<ENDFOOTER);
982: <hr />
983: <a name="editsection" />
984: <form method="post">
985: <textarea cols="80" rows="40" name="filecont">$filecontents</textarea>
986: <br />
987: <input type="submit" name="attemptclean"
988: value="Save and then attempt to clean HTML" />
989: <input type="submit" name="savethisfile" value="Save this" />
990: </form>
991: ENDFOOTER
992: $result=~s/(\<body[^\>]*\>)/$1$editheader/is;
993: $result=~s/(\<\/body\>)/$editfooter/is;
994: return $result;
995: }
996:
997: sub handler {
998: my $request=shift;
999:
1000: my $target='web';
1001:
1002: $Apache::lonxml::debug=0;
1003:
1004: if ($ENV{'browser.mathml'}) {
1005: $request->content_type('text/xml');
1006: } else {
1007: $request->content_type('text/html');
1008: }
1009:
1010: $request->send_http_header;
1011:
1012: return OK if $request->header_only;
1013:
1014:
1015: my $file=&Apache::lonnet::filelocation("",$request->uri);
1016: #
1017: # Edit action? Save file.
1018: #
1019: unless ($ENV{'request.state'} eq 'published') {
1020: if (($ENV{'form.savethisfile'}) || ($ENV{'form.attemptclean'})) {
1021: &storefile($file,$ENV{'form.filecont'});
1022: }
1023: }
1024: my %mystyle;
1025: my $result = '';
1026: my $filecontents=&Apache::lonnet::getfile($file);
1027: if ($filecontents == -1) {
1028: $result=(<<ENDNOTFOUND);
1029: <html>
1030: <head>
1031: <title>File not found</title>
1032: </head>
1033: <body bgcolor="#FFFFFF">
1034: <b>File not found: $file</b>
1035: </body>
1036: </html>
1037: ENDNOTFOUND
1038: $filecontents='';
1039: } else {
1040: unless ($ENV{'request.state'} eq 'published') {
1041: if ($ENV{'form.attemptclean'}) {
1042: $filecontents=&htmlclean($filecontents,1);
1043: }
1044: }
1045: $result = &Apache::lonxml::xmlparse($target,$filecontents,'',%mystyle);
1046: }
1047:
1048: #
1049: # Edit action? Insert editing commands
1050: #
1051: unless ($ENV{'request.state'} eq 'published') {
1052: $result=&inserteditinfo($result,$filecontents);
1053: }
1054:
1055: writeallows($request->uri);
1056:
1057: $request->print($result);
1058:
1059: return OK;
1060: }
1061:
1062: sub debug {
1063: if ($Apache::lonxml::debug eq 1) {
1064: print("DEBUG:".$_[0]."<br />\n");
1065: }
1066: }
1067:
1068: sub error {
1069: if (($Apache::lonxml::debug eq 1) || ($ENV{'request.state'} eq 'construct') ) {
1070: print "<b>ERROR:</b>".$_[0]."<br />\n";
1071: } else {
1072: print "<b>An Error occured while processing this resource. The instructor has been notified.</b> <br />";
1073: #notify author
1074: &Apache::lonmsg::author_res_msg($ENV{'request.filename'},$_[0]);
1075: #notify course
1076: if ( $ENV{'request.course.id'} ) {
1077: my $users=$ENV{'course.'.$ENV{'request.course.id'}.'.comment.email'};
1078: foreach my $user (split /\,/, $users) {
1079: ($user,my $domain) = split /:/, $user;
1080: &Apache::lonmsg::user_normal_msg($user,$domain,"Error in $ENV{'request.filename'}",$_[0]);
1081: }
1082: }
1083:
1084: #FIXME probably shouldn't have me get everything forever.
1085: &Apache::lonmsg::user_normal_msg('albertel','msu',"Error in $ENV{'request.filename'}",$_[0]);
1086: #&Apache::lonmsg::user_normal_msg('albertel','103',"Error in $ENV{'request.filename'}",$_[0]);
1087: }
1088: }
1089:
1090: sub warning {
1091: if ($ENV{'request.state'} eq 'construct') {
1092: print "<b>W</b>ARNING<b>:</b>".$_[0]."<br />\n";
1093: }
1094: }
1095:
1096: sub get_param {
1097: my ($param,$parstack,$safeeval,$context) = @_;
1098: if ( ! $context ) { $context = -1; }
1099: my $args ='';
1100: if ( $#$parstack > (-2-$context) ) { $args=$$parstack[$context]; }
1101: if ( $args =~ /my \$$param=\"/ ) {
1102: return &Apache::run::run("{$args;".'return $'.$param.'}',$safeeval); #'
1103: } else {
1104: return undef;
1105: }
1106: }
1107:
1108: sub register_insert {
1109: my @data = split /\n/, &Apache::lonnet::getfile('/home/httpd/lonTabs/insertlist.tab');
1110: my $i;
1111: my $tagnum=0;
1112: my @order;
1113: for ($i=0;$i < $#data; $i++) {
1114: my $line = $data[$i];
1115: if ( $line =~ /^\#/ || $line =~ /^\s*\n/) { next; }
1116: if ( $line =~ /TABLE/ ) { last; }
1117: my ($tag,$descrip,$color,$function,$show) = split(/,/, $line);
1118: $insertlist{"$tagnum.tag"} = $tag;
1119: $insertlist{"$tagnum.description"} = $descrip;
1120: $insertlist{"$tagnum.color"} = $color;
1121: $insertlist{"$tagnum.function"} = $function;
1122: $insertlist{"$tagnum.show"}= $show;
1123: $insertlist{"$tag.num"}=$tagnum;
1124: $tagnum++;
1125: }
1126: $i++; #skipping TABLE line
1127: $tagnum = 0;
1128: for (;$i < $#data;$i++) {
1129: my $line = $data[$i];
1130: my ($mnemonic,@which) = split(/ +/,$line);
1131: my $tag = $insertlist{"$tagnum.tag"};
1132: for (my $j=0;$j <$#which;$j++) {
1133: if ( $which[$j] eq 'Y' ) {
1134: if ($insertlist{"$j.show"} ne 'no') {
1135: push(@{ $insertlist{"$tag.which"} },$j);
1136: }
1137: }
1138: }
1139: $tagnum++;
1140: }
1141: }
1142:
1143: sub description {
1144: my ($token)=@_;
1145: return $insertlist{$insertlist{"$token->[1].num"}.'.description'};
1146: }
1147:
1148: # ----------------------------------------------------------------- whichuser
1149: # returns a list of $symb, $courseid, $domain, $name that is correct for
1150: # calls to lonnet functions for this setup.
1151: # - looks for form.grade_ parameters
1152: sub whichuser {
1153: my $symb=&Apache::lonnet::symbread();
1154: my $courseid=$ENV{'request.course.id'};
1155: my $domain=$ENV{'user.domain'};
1156: my $name=$ENV{'user.name'};
1157: if (defined($ENV{'form.grade_symb'})) {
1158: my $tmp_courseid=$ENV{'form.grade_courseid'};
1159: my $allowed=&Apache::lonnet::allowed('mgr',$tmp_courseid);
1160: if ($allowed) {
1161: $symb=$ENV{'form.grade_symb'};
1162: $courseid=$ENV{'form.grade_courseid'};
1163: $domain=$ENV{'form.grade_domain'};
1164: $name=$ENV{'form.grade_username'};
1165: }
1166: }
1167: return ($symb,$courseid,$domain,$name);
1168: }
1169:
1170: 1;
1171: __END__
1172:
1173:
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