summaryrefslogtreecommitdiff
path: root/Master/tlpkg/tlperl/lib/Tk.pm
blob: deb453172eb03565ab5c78e132edc492d446d878 (plain)
1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
31
32
33
34
35
36
37
38
39
40
41
42
43
44
45
46
47
48
49
50
51
52
53
54
55
56
57
58
59
60
61
62
63
64
65
66
67
68
69
70
71
72
73
74
75
76
77
78
79
80
81
82
83
84
85
86
87
88
89
90
91
92
93
94
95
96
97
98
99
100
101
102
103
104
105
106
107
108
109
110
111
112
113
114
115
116
117
118
119
120
121
122
123
124
125
126
127
128
129
130
131
132
133
134
135
136
137
138
139
140
141
142
143
144
145
146
147
148
149
150
151
152
153
154
155
156
157
158
159
160
161
162
163
164
165
166
167
168
169
170
171
172
173
174
175
176
177
178
179
180
181
182
183
184
185
186
187
188
189
190
191
192
193
194
195
196
197
198
199
200
201
202
203
204
205
206
207
208
209
210
211
212
213
214
215
216
217
218
219
220
221
222
223
224
225
226
227
228
229
230
231
232
233
234
235
236
237
238
239
240
241
242
243
244
245
246
247
248
249
250
251
252
253
254
255
256
257
258
259
260
261
262
263
264
265
266
267
268
269
270
271
272
273
274
275
276
277
278
279
280
281
282
283
284
285
286
287
288
289
290
291
292
293
294
295
296
297
298
299
300
301
302
303
304
305
306
307
308
309
310
311
312
313
314
315
316
317
318
319
320
321
322
323
324
325
326
327
328
329
330
331
332
333
334
335
336
337
338
339
340
341
342
343
344
345
346
347
348
349
350
351
352
353
354
355
356
357
358
359
360
361
362
363
364
365
366
367
368
369
370
371
372
373
374
375
376
377
378
379
380
381
382
383
384
385
386
387
388
389
390
391
392
393
394
395
396
397
398
399
400
401
402
403
404
405
406
407
408
409
410
411
412
413
414
415
416
417
418
419
420
421
422
423
424
425
426
427
428
429
430
431
432
433
434
435
436
437
438
439
440
441
442
443
444
445
446
447
448
449
450
451
452
453
454
455
456
457
458
459
460
461
462
463
464
465
466
467
468
469
470
471
472
473
474
475
476
477
478
479
480
481
482
483
484
485
486
487
488
489
490
491
492
493
494
495
496
497
498
499
500
501
502
503
504
505
506
507
508
509
510
511
512
513
514
515
516
517
518
519
520
521
522
523
524
525
526
527
528
529
530
531
532
533
534
535
536
537
538
539
540
541
542
543
544
545
546
547
548
549
550
551
552
553
554
555
556
557
558
559
560
561
562
563
564
565
566
567
568
569
570
571
572
573
574
575
576
577
578
579
580
581
582
583
584
585
586
587
588
589
590
591
592
593
594
595
596
597
598
599
600
601
602
603
604
605
606
607
608
609
610
611
612
613
614
615
616
617
618
619
620
621
622
623
624
625
626
627
628
629
630
631
632
633
634
635
636
637
638
639
640
641
642
643
644
645
646
647
648
649
650
651
652
653
654
655
656
657
658
659
660
661
662
663
664
665
666
667
668
669
670
671
672
673
674
675
676
677
678
679
680
681
682
683
684
685
686
687
688
689
690
691
692
693
694
695
696
697
698
699
700
701
702
703
704
705
706
707
708
709
710
711
712
713
714
715
716
717
718
719
720
721
722
723
724
725
726
727
728
729
730
731
732
733
734
735
736
737
738
739
740
741
742
743
744
745
746
747
748
749
750
751
752
753
754
755
756
757
758
759
760
761
762
763
764
765
766
767
768
769
770
771
772
773
774
775
776
777
778
779
780
781
782
783
784
785
786
787
788
789
790
791
792
793
794
795
796
797
798
799
800
801
802
803
804
805
806
807
808
809
810
811
812
813
814
815
816
817
818
819
820
821
#
# Copyright (c) 1992-1994 The Regents of the University of California.
# Copyright (c) 1994 Sun Microsystems, Inc.
# Copyright (c) 1995-2004 Nick Ing-Simmons. All rights reserved.
# This program is free software; you can redistribute it and/or

# modify it under the same terms as Perl itself, subject
# to additional disclaimer in Tk/license.terms due to partial
# derivation from Tk8.0 sources.
#
package Tk;
require 5.007;
use     Tk::Event ();
use     AutoLoader qw(AUTOLOAD);
use     DynaLoader;
use     Cwd();
use base qw(Exporter DynaLoader);

*fileevent = \&Tk::Event::IO::fileevent;

use Encode;
$Tk::encodeStopOnError = Encode::FB_QUIET();
$Tk::encodeFallback    = Encode::FB_PERLQQ(); # Encode::FB_DEFAULT();

our %font_encoding = ('jis0208' => 'jis0208-raw',
                      'jis0212' => 'jis0212-raw',
                      'ksc5601' => 'ksc5601-raw',
                      'gb2312'  => 'gb2312-raw',
                      'unicode' => 'ucs-2le',
                     );

BEGIN {
 if($^O eq 'cygwin')
  {
   require Tk::Config;
   $Tk::platform = $Tk::Config::win_arch;
   $Tk::platform = 'unix' if $Tk::platform eq 'x';
  }
 else
  {
   $Tk::platform = ($^O eq 'MSWin32') ? $^O : 'unix';
  }
};

$Tk::tearoff = 1 if ($Tk::platform eq 'unix');


@EXPORT    = qw(Exists Ev exit MainLoop DoOneEvent tkinit);
@EXPORT_OK = qw(NoOp after *widget *event lsearch catch $XS_VERSION
                DONT_WAIT WINDOW_EVENTS  FILE_EVENTS TIMER_EVENTS
                IDLE_EVENTS ALL_EVENTS
                NORMAL_BG ACTIVE_BG SELECT_BG
                SELECT_FG TROUGH INDICATOR DISABLED BLACK WHITE);
%EXPORT_TAGS = (eventtypes => [qw(DONT_WAIT WINDOW_EVENTS  FILE_EVENTS
                                  TIMER_EVENTS IDLE_EVENTS ALL_EVENTS)],
                variables  => [qw(*widget *event)],
                colors     => [qw(NORMAL_BG ACTIVE_BG SELECT_BG SELECT_FG
                                  TROUGH INDICATOR DISABLED BLACK WHITE)],
               );

use strict;
use Carp;

# Record author's perforce depot record
$Tk::CHANGE      = q$Change: 3279 $;

# $tk_version and $tk_patchLevel are reset by pTk when a mainwindow
# is created, $VERSION is checked by bootstrap
$Tk::version     = '8.4';
$Tk::patchLevel  = '8.4';
$Tk::VERSION     = '804.027';
$Tk::XS_VERSION  = $Tk::VERSION;
$Tk::strictMotif = 0;


{($Tk::library) = __FILE__ =~ /^(.*)\.pm$/;}
$Tk::library = Tk->findINC('.') unless (defined($Tk::library) && -d $Tk::library);

$Tk::widget  = undef;
$Tk::event   = undef;

use vars qw($inMainLoop);

bootstrap Tk;

my $boot_time = timeofday();

# This is a workround for Solaris X11 locale handling
Preload(DynaLoader::dl_findfile('-L/usr/openwin/lib','-lX11'))
  if (NeedPreload() && -d '/usr/openwin/lib');

use Tk::Submethods ('option'    =>  [qw(add get clear readfile)],
                    'clipboard' =>  [qw(clear append)]
                   );

#
# Next few routines are here as perl code as doing caller()
# in XS code is very complicated - so instead C code calls BackTrace
#
sub _backTrace
{
 my $w = shift;
 my $i = 1;
 my ($pack,$file,$line,$sub) = caller($i++);
 while (1)
  {
   my $loc = "at $file line $line";
   ($pack,$file,$line,$sub) = caller($i++);
   last unless defined($sub);
   return 1 if $sub eq '(eval)';
   $w->AddErrorInfo("$sub $loc");
  }
 return 0;
}

sub BackTrace
{
 my $w = shift;
 return unless (@_ || $@);
 my $mess = (@_) ? shift : "$@";
 die "$mess\n" if $w->_backTrace;
 # if we get here we are not in an eval so report now
 $w->Fail($mess);
 $w->idletasks;
 die "$mess\n";
}

#
# This is a $SIG{__DIE__} handler which does not change the $@
# string in the way 'croak' does, but rather add to Tk's ErrorInfo.
# It stops at 1st enclosing eval on assumption that the eval
# is part of Tk call process and will add its own context to ErrorInfo
# and then pass on the error.
#
sub __DIE__
{
 my $mess = shift;
 my $w = $Tk::widget;
 # Note that if a __DIE__ handler returns it re-dies up the chain.
 return unless defined($w) && Exists($w);
 # This special message is for exit() as an exception see pTkCallback.c
 return if $mess =~/^_TK_EXIT_\(\d+\)/;
 return if $w->_backTrace;
 # Not in an eval - should not happen
}

sub XEvent::xy { shift->Info('xy') }

sub XEvent::AUTOLOAD
{
 my ($meth) = $XEvent::AUTOLOAD =~ /(\w)$/;
 no strict 'refs';
 *{$XEvent::AUTOLOAD} = sub { shift->Info($meth) };
 goto &$XEvent::AUTOLOAD;
}

sub NoOp  { }

sub Ev
{
 if (@_ == 1)
  {
   my $arg = $_[0];
   return bless (((ref $arg) ? $arg : \$arg), 'Tk::Ev');
  }
 else
  {
   return bless [@_],'Tk::Ev';
  }
}

sub InitClass
{
 my ($package,$parent) = @_;
 croak "Unexpected type of parent $parent" unless(ref $parent);
 croak "$parent is not a widget" unless($parent->IsWidget);
 my $mw = $parent->MainWindow;
 my $hash = $mw->TkHash('_ClassInit_');
 unless (exists $hash->{$package})
  {
   $package->Install($mw);
   $hash->{$package} = $package->ClassInit($mw);
  }
}

require Tk::Widget;
require Tk::Image;
require Tk::MainWindow;

sub Exists
{my $w = shift;
 return defined($w) && ref($w) && $w->IsWidget && $w->exists;
}

sub Time_So_Far
{
 return timeofday() - $boot_time;
}

# Selection* are not autoloaded as names are too long.

sub SelectionOwn
{my $widget = shift;
 selection('own',(@_,$widget));
}

sub SelectionOwner
{
 selection('own','-displayof',@_);
}

sub SelectionClear
{
 selection('clear','-displayof',@_);
}

sub SelectionExists
{
 selection('exists','-displayof',@_);
}

sub SelectionHandle
{my $widget = shift;
 my $command = pop;
 selection('handle',@_,$widget,$command);
}

sub SplitString
{
 local $_ = shift;
 my (@arr, $tmp);
 while (/\{([^{}]*)\}|((?:[^\s\\]|\\.)+)/gs) {
   if (defined $1) { push @arr, $1 }
   else { $tmp = $2 ; $tmp =~ s/\\([\s\\])/$1/g; push @arr, $tmp }
 }
 # carp '('.join(',',@arr).")";
 return @arr;
}

sub Methods
{
 my ($package) = caller;
 no strict 'refs';
 foreach my $meth (@_)
  {
   my $name = $meth;
   *{$package."::$meth"} = sub { shift->WidgetMethod($name,@_) };
  }
}

my %dialog = ( tk_chooseColor => 'ColorDialog',
               tk_messageBox  => 'MessageBox',
               tk_getOpenFile => 'FDialog',
               tk_getSaveFile => 'FDialog',
               tk_chooseDirectory => 'FDialog'
# Slaven claims NI-S's version above does not work
# and provides this
#              tk_chooseDirectory => 'DirDialog'
             );

foreach my $dialog (keys %dialog)
 {
  no strict 'refs';
  unless (defined &$dialog)
   {
    my $kind = $dialog;
    my $code = \&{"Tk::$dialog{$dialog}"};
    *$dialog = sub { &$code($kind,@_) };
   }
 }

sub MessageBox {
    my ($kind,%args) = @_;
    require Tk::Dialog;
    my $parent = delete $args{'-parent'};
    my $args = \%args;

    $args->{-bitmap} = delete $args->{-icon} if defined $args->{-icon};
    $args->{-text} = delete $args->{-message} if defined $args->{-message};
    $args->{-type} = 'OK' unless defined $args->{-type};

    my $type;
    if (defined($type = delete $args->{-type})) {
	delete $args->{-type};
	my @buttons = grep($_,map(ucfirst($_),
                      split(/(abort|retry|ignore|yes|no|cancel|ok)/,
                            lc($type))));
	$args->{-buttons} = [@buttons];
	$args->{-default_button} = ucfirst(delete $args->{-default}) if
	    defined $args->{-default};
	if (not defined $args->{-default_button} and scalar(@buttons) == 1) {
	   $args->{-default_button} = $buttons[0];
	}
        my $md = $parent->Dialog(%$args);
        my $an = $md->Show;
        $md->destroy;
        return $an;
    }
} # end messageBox

sub messageBox
{
 my ($widget,%args) = @_;
 # remove in a later version:
 if (exists $args{'-text'})
  {
   warn "The -text option is deprecated. Please use -message instead";
   if (!exists $args{'-message'})
    {
     $args{'-message'} = delete $args{'-text'};
    }
  }
 $args{'-type'}    = (exists $args{'-type'})    ? lc($args{'-type'}) : 'ok';
 $args{'-default'} = lc($args{'-default'}) if (exists $args{'-default'});
 ucfirst tk_messageBox(-parent => $widget, %args);
}

sub getOpenFile
{
 tk_getOpenFile(-parent => shift,@_);
}

sub getSaveFile
{
 tk_getSaveFile(-parent => shift,@_);
}

sub chooseColor
{
 tk_chooseColor(-parent => shift,@_);
}

sub chooseDirectory
{
 tk_chooseDirectory(-parent => shift,@_);
}

sub DialogWrapper
{
 my ($method,$kind,%args) = @_;
 my $created = 0;
 my $w = delete $args{'-parent'};
 if (defined $w)
  {
   $args{'-popover'} = $w;
  }
 else
  {
   $w = MainWindow->new;
   $w->withdraw;
   $created = 1;
  }
 my $mw = $w->toplevel;
 my $fs = $mw->{$kind};
 unless (defined $fs)
  {
   $mw->{$kind} = $fs = $mw->$method(%args);
  }
 else
  {
   $fs->configure(%args);
  }
 my $val = $fs->Show;
 $w->destroy if $created;
 return $val;
}

sub ColorDialog
{
 require Tk::ColorEditor;
 DialogWrapper('ColorDialog',@_);
}

sub FDialog
{
 require Tk::FBox;
 my $cmd = shift;
 if ($cmd =~ /Save/)
  {
   push @_, -type => 'save';
  }
 elsif ($cmd =~ /Directory/)
  {
   push @_, -type => 'dir';
  }
 DialogWrapper('FBox', $cmd, @_);
}

sub DirDialog
{
 require Tk::DirTree;
 DialogWrapper('DirTreeDialog',@_);
}

*MotifFDialog = \&FDialog;

*CORE::GLOBAL::exit = \&exit;

sub MainLoop
{
 unless ($inMainLoop)
  {
   local $inMainLoop = 1;
   while (Tk::MainWindow->Count)
    {
     DoOneEvent(0);
    }
  }
}

sub tkinit { return MainWindow->new(@_) }

# a wrapper on eval which turns off user $SIG{__DIE__}
sub catch (&)
{
 my $sub = shift;
 eval {local $SIG{'__DIE__'}; &$sub };
}

my $Home;

sub TranslateFileName
{
 local $_ = shift;
 unless (defined $Home)
  {
   $Home = $ENV{'HOME'} || (defined $ENV{'HOMEDRIVE'} && defined $ENV{'HOMEPATH'} ? $ENV{'HOMEDRIVE'}.$ENV{'HOMEPATH'} : "");
   $Home =~ s#\\#/#g;
   $Home .= '/' unless $Home =~ m#/$#;
  }
 s#~/#$Home#g;
 # warn $_;
 return $_;
}

sub findINC
{
 my $file = join('/',@_);
 my $dir;
 $file  =~ s,::,/,g;
 foreach $dir (@INC)
  {
   my $path;
   return $path if (-e ($path = "$dir/$file"));
  }
 return undef;
}

sub idletasks
{
 shift->update('idletasks');
}

sub backtrace
{
 my ($self,$msg,$i) = @_;
 $i = 1 if @_ < 3;
 while (1)
  {
   my ($pack,$file,$line,$sub) = caller($i++);
   last unless defined($sub);
   $msg .= "\n $sub at $file line $line";
  }
 return "$msg\n";
}

sub die_with_trace
{
 my ($self,$msg) = @_;
 die $self->backtrace($msg,1);
}



1;

__END__

sub Error
{my $w = shift;
 my $error = shift;
 if (Exists($w))
  {
   my $grab = $w->grab('current');
   $grab->Unbusy if (defined $grab);
  }
 chomp($error);
 warn "Tk::Error: $error\n " . join("\n ",@_)."\n";
}

sub CancelRepeat
{
 my $w = shift->MainWindow;
 my $id = delete $w->{_afterId_};
 $w->after('cancel',$id) if (defined $id);
}

sub RepeatId
{
 my ($w,$id) = @_;
 $w = $w->MainWindow;
 $w->CancelRepeat;
 $w->{_afterId_} = $id;
}



#----------------------------------------------------------------------------
# focus.tcl --
#
# This file defines several procedures for managing the input
# focus.
#
# @(#) focus.tcl 1.6 94/12/19 17:06:46
#
# Copyright (c) 1994 Sun Microsystems, Inc.
#
# See the file "license.terms" for information on usage and redistribution
# of this file, and for a DISCLAIMER OF ALL WARRANTIES.

sub FocusChildren { shift->children }

#
# focusNext --
# This procedure is invoked to move the input focus to the next window
# after a given one. "Next" is defined in terms of the window
# stacking order, with all the windows underneath a given top-level
# (no matter how deeply nested in the hierarchy) considered except
# for frames and toplevels.
#
# Arguments:
# w - Name of a window: the procedure will set the focus
# to the next window after this one in the traversal
# order.
sub focusNext
{
 my $w = shift;
 my $cur = $w;
 while (1)
  {
   # Descend to just before the first child of the current widget.
   my $parent = $cur;
   my @children = $cur->FocusChildren();
   my $i = -1;
   # Look for the next sibling that isn't a top-level.
   while (1)
    {
     $i += 1;
     if ($i < @children)
      {
       $cur = $children[$i];
       next if ($cur->toplevel == $cur);
       last
      }
     # No more siblings, so go to the current widget's parent.
     # If it's a top-level, break out of the loop, otherwise
     # look for its next sibling.
     $cur = $parent;
     last if ($cur->toplevel() == $cur);
     $parent = $parent->parent();
     @children = $parent->FocusChildren();
     $i = lsearch(\@children,$cur);
    }
   if ($cur == $w || $cur->FocusOK)
    {
     $cur->tabFocus;
     return;
    }
  }
}
# focusPrev --
# This procedure is invoked to move the input focus to the previous
# window before a given one. "Previous" is defined in terms of the
# window stacking order, with all the windows underneath a given
# top-level (no matter how deeply nested in the hierarchy) considered.
#
# Arguments:
# w - Name of a window: the procedure will set the focus
# to the previous window before this one in the traversal
# order.
sub focusPrev
{
 my $w = shift;
 my $cur = $w;
 my @children;
 my $i;
 my $parent;
 while (1)
  {
   # Collect information about the current window's position
   # among its siblings. Also, if the window is a top-level,
   # then reposition to just after the last child of the window.
   if ($cur->toplevel() == $cur)
    {
     $parent = $cur;
     @children = $cur->FocusChildren();
     $i = @children;
    }
   else
    {
     $parent = $cur->parent();
     @children = $parent->FocusChildren();
     $i = lsearch(\@children,$cur);
    }
   # Go to the previous sibling, then descend to its last descendant
   # (highest in stacking order. While doing this, ignore top-levels
   # and their descendants. When we run out of descendants, go up
   # one level to the parent.
   while ($i > 0)
    {
     $i--;
     $cur = $children[$i];
     next if ($cur->toplevel() == $cur);
     $parent = $cur;
     @children = $parent->FocusChildren();
     $i = @children;
    }
   $cur = $parent;
   if ($cur == $w || $cur->FocusOK)
    {
     $cur->tabFocus;
     return;
    }
  }

}

sub FocusOK
{
 my $w = shift;
 my $value;
 catch { $value = $w->cget('-takefocus') };
 if (!$@ && defined($value))
  {
   return 0 if ($value eq '0');
   return $w->viewable if ($value eq '1');
   if ($value)
    {
     $value = $w->$value();
     return $value if (defined $value);
    }
  }
 if (!$w->viewable)
  {
   return 0;
  }
 catch { $value = $w->cget('-state') } ;
 if (!$@ && defined($value) && $value eq 'disabled')
  {
   return 0;
  }
 $value = grep(/Key|Focus/,$w->Tk::bind(),$w->Tk::bind(ref($w)));
 return $value;
}


# focusFollowsMouse
#
# If this procedure is invoked, Tk will enter "focus-follows-mouse"
# mode, where the focus is always on whatever window contains the
# mouse. If this procedure isn't invoked, then the user typically
# has to click on a window to give it the focus.
#
# Arguments:
# None.

sub EnterFocus
{
 my $w  = shift;
 return unless $w;
 my $Ev = $w->XEvent;
 my $d  = $Ev->d;
 $w->Tk::focus() if ($d eq 'NotifyAncestor' ||  $d eq 'NotifyNonlinear' ||  $d eq 'NotifyInferior');
}

sub tabFocus
{
 shift->Tk::focus;
}

sub focusFollowsMouse
{
 my $widget = shift;
 $widget->bind('all','<Enter>','EnterFocus');
}

# tkTraverseToMenu --
# This procedure implements keyboard traversal of menus. Given an
# ASCII character "char", it looks for a menubutton with that character
# underlined. If one is found, it posts the menubutton's menu
#
# Arguments:
# w - Window in which the key was typed (selects
# a toplevel window).
# char - Character that selects a menu. The case
# is ignored. If an empty string, nothing
# happens.
sub TraverseToMenu
{
 my $w = shift;
 my $char = shift;
 return unless(defined $char && $char ne '');
 $w = $w->toplevel->FindMenu($char);
}
# tkFirstMenu --
# This procedure traverses to the first menubutton in the toplevel
# for a given window, and posts that menubutton's menu.
#
# Arguments:
# w - Name of a window. Selects which toplevel
# to search for menubuttons.
sub FirstMenu
{
 my $w = shift;
 $w = $w->toplevel->FindMenu('');
}

# These wrappers don't use method syntax so need to live
# in same package as raw Tk routines are newXS'ed into.

sub Selection
{my $widget = shift;
 my $cmd    = shift;
 croak 'Use SelectionOwn/SelectionOwner' if ($cmd eq 'own');
 croak "Use Selection\u$cmd()";
}

# If we have sub Clipboard in Tk then use base qw(Tk::Clipboard ....)
# calls it when it does its eval "require $base"
#sub Clipboard
#{my $w = shift;
# my $cmd    = shift;
# croak "Use clipboard\u$cmd()";
#}

sub Receive
{
 my $w = shift;
 warn 'Receive(' . join(',',@_) .')';
 die 'Tk rejects send(' . join(',',@_) .")\n";
}

sub break
{
 die "_TK_BREAK_\n";
}

sub updateWidgets
{
 my ($w) = @_;
 while ($w->DoOneEvent(DONT_WAIT|IDLE_EVENTS|WINDOW_EVENTS))
  {
  }
 $w;
}

sub ImageNames
{
 image('names');
}

sub ImageTypes
{
 image('types');
}

sub interps
{
 my $w = shift;
 return $w->winfo('interps','-displayof');
}

sub lsearch
{my $ar = shift;
 my $x  = shift;
 my $i;
 for ($i = 0; $i < scalar @$ar; $i++)
  {
   return $i if ($$ar[$i] eq $x);
  }
 return -1;
}


sub getEncoding
{
 my ($class,$name) = @_;
 eval { require Encode };
 if ($@)
  {
   require Tk::DummyEncode;
   return Tk::DummyEncode->getEncoding($name);
  }
 $name = $Tk::font_encoding{$name} if exists $Tk::font_encoding{$name};
 my $enc = Encode::find_encoding($name);

 unless ($enc)
  {
   $enc = Encode::find_encoding($name) if ($name =~ s/[-_]\d+$//)
  }
# if ($enc)
#  {
#   print STDERR "Lookup '$name' => ".$enc->name."\n";
#  }
# else
#  {
#   print STDERR "Failed '$name'\n";
#  }
 unless ($enc)
  {
   if ($name eq 'X11ControlChars')
    {
     require Tk::DummyEncode;
     $Encode::encoding{$name} = $enc = Tk::DummyEncode->getEncoding($name);
    }
  }
 return $enc;
}