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