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#-*- perl -*-
#
# Copyright (C) 2008 Ken'ichi Fukamachi
# All rights reserved. This program is free software; you can
# redistribute it and/or modify it under the same terms as Perl itself.
#
# $FML: @template.pm,v 1.12 2008/08/24 08:28:36 fukachan Exp $
#
package FML::String::Banner::Ascii;
use strict;
use vars qw(@ISA @EXPORT @EXPORT_OK $AUTOLOAD $banner_table);
use Carp;
use FML::Char::Ascii::Data;
$banner_table = $FML::Char::Ascii::Data::banner_table;
=head1 NAME
FML::String::Banner::Ascii - generate an ascii bannner.
=head1 SYNOPSIS
use FML::String::Banner::Ascii;
my $banner = new FML::String::Banner::Ascii;
print $banner->as_ascii("TRIAL_PASSWORD", 8);
=head1 DESCRIPTION
See L<FML::String::Banner> CLASS. This class provides the ascii part
of the class.
=head1 METHODS
=head2 new()
constructor.
=cut
# Descriptions: constructor.
# Arguments: OBJ($self)
# Side Effects: none
# Return Value: OBJ
sub new
{
my ($self) = @_;
my ($type) = ref($self) || $self;
my $me = {};
return bless $me, $type;
}
=head2 as_ascii($string, $drift)
return an ascii banner string. The string is specificed by the
argument $string. The vertical position of each character in the
$string is shifted randomly within the $drift characters.
=cut
# Descriptions: return an ascii banner string. The string is
# specificed by the argument $string. The vertical
# position of each character in the $string is shifted
# randomly within the $drift characters.
# Arguments: OBJ($self) STR($string) NUM($drift)
# Side Effects: none
# Return Value: STR
sub as_ascii
{
my ($self, $string, $drift) = @_;
my (@banner) = ();
srand(time|$$);
my ($_seed) = $drift || 8;
my ($strlen) = length($string);
for (my $i = 0; $i < $strlen; $i++) {
my $c = substr($string, $i, 1);
my $t = $banner_table->{ $c };
# stuff the banner into the final buffer with random height position;
my $height_begin = int(rand($drift));
for (my $h = 0, my $j = 0; $h < 8 + $drift; $h++) {
if ($h < $height_begin || $h >= $height_begin + 8) {
$banner[ $h ] .= " ";
}
else {
$banner[ $h ] .= $t->[ $j++ ];
}
$banner[ $h ] .= " ";
}
}
my $r = join("\n", @banner);
return sprintf("%s\n", $r);
}
=head1 CODING STYLE
See C<http://www.fml.org/software/FNF/> on fml coding style guide.
=head1 AUTHOR
Ken'ichi Fukamachi
=head1 COPYRIGHT
Copyright (C) 2008 Ken'ichi Fukamachi
All rights reserved. This program is free software; you can
redistribute it and/or modify it under the same terms as Perl itself.
=head1 HISTORY
FML::String::Banner::Ascii appeared in fml8 mailing list driver package.
See C<http://www.fml.org/> for more details.
=cut
1;
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