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package Tk::Zinc::TraceUtils;
use vars qw( $VERSION );
($VERSION) = sprintf("%d.%02d", q$Revision$ =~ /(\d+)\.(\d+)/);
use Tk;
use Tk::Font;
use Tk::Photo;
require Exporter;
@ISA = qw(Exporter);
@EXPORT = qw(printItem printArray printList Item Array List);
use strict;
sub printItem {
print &Item (@_);
}
sub printArray {
print &Array (@_);
}
sub printList {
print &List (@_);
}
### to print something
sub Item {
my ($value) = @_;
my $ref = ref($value);
# print "VALUE=$value REF=$ref\n";
if ($ref eq 'ARRAY') {
return Array ( @{$value} );
} elsif ($ref eq 'CODE') {
return "{CODE}";
} elsif ($ref eq 'Tk::Photo') {
# print " **** $value ***** ";
return "Tk::Photo(\"". scalar $value->cget('-file') . "\")";
} elsif ($ref eq 'Tk::Font') {
return "'$value'";
} elsif ($ref eq '') { # scalar
if (defined $value) {
if ($value =~ /^-?\d+(\.\d*(e[+-]?\d+)?)?$/ or # -1. or 1.0
$value =~ /^-[a-zA-Z]([\w])*$/ # -option1 or -option-1
) {
return $value;
} elsif ($value eq ''
or $value =~ /\s/
or $value =~ /^[a-zA-Z]/
or $value =~ /^[\W]/
) {
return "'$value'";
} else {
return $value;
}
} else {
return "_undef";
}
} else { # some class instance
return $value;
}
} # end Item
### to print a list of something
sub Array {
my (@values) = @_;
if (! scalar @values) {
return "[]";
}
else { # the list is not empty
my $res = "[";
while (@values) {
my $value = shift @values;
$res .= &Item ($value);
$res .= ", " if (@values);
}
return $res. "]" ;
}
} # end Array
sub List {
my $res = "(";
while (@_) {
my $v = shift @_;
$res .= Item ($v);
if (@_ > 0) {
## still some elements
if ($v =~ /^-\d+$/) {
$res .= ", ";
} elsif ($v =~ /^-\w+$/) {
$res .= " => ";
} else {
$res .= ", ";
}
}
}
return $res. ")";
} # end List
1;
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