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