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#!/usr/bin/env perl
use strict;
use warnings;
use List::Util 'max';
my $keyboard = do {
no warnings 'qw';
[
[ qw(1 2 3 4 5 6 7 8 9 0 - =) ],
[ qw(q w e r t y u i o p [ ]) ],
[ qw(a s d f g h j k l ; ') ],
[ qw(z x c v b n m , . /) ],
]
};
if ($ARGV[0] eq '--debug') {
require Term::ReadKey;
my ($xres, $yres) = Term::ReadKey::GetTerminalSize();
my %offset_map = _calculate_offset_map($keyboard, $xres, $yres);
print "\e[2J";
for my $row (@$keyboard) {
for my $key (@$row) {
my $offset = $offset_map{$key};
print "\e[$offset->[1];$offset->[0]H$key";
}
}
getc;
}
else {
my $key = $ARGV[0];
my ($xres, $yres) = `xrandr` =~ /Screen 0:.*current (\d+) x (\d+),/;
my %offset_map = _calculate_offset_map($keyboard, $xres, $yres);
my $offset = $offset_map{$key};
# make sure the new location gains focus
system("swarp", 0, 0);
system("swarp", $xres, $yres);
system("swarp", $offset->[0], $offset->[1]);
}
sub _calculate_offset_map {
my ($keyboard, $xres, $yres) = @_;
my %map;
my $width = max map { $_ + 2 * @{ $keyboard->[$_] } } 0..$#$keyboard;
my $xincr = $xres / $width;
my $height = @$keyboard;
my $yincr = $yres / $height;
my $ypos = 0.5 * $yincr;
for my $row (0..$#$keyboard) {
my $xpos = (0.5 + $row) * $xincr;
for my $key (@{ $keyboard->[$row] }) {
$map{$key} = [int($xpos + 0.5), int($ypos + 0.5)];
$xpos += 2 * $xincr;
}
$ypos += $yincr;
}
return %map;
}
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