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