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#!/usr/bin/env perl
#
# Copyright 2014 Marcelo Cerri <mhcerri at gmail dot com>
#
# This program is free software: you can redistribute it and/or modify
# it under the terms of the GNU General Public License as published by
# the Free Software Foundation, either version 3 of the License, or
# (at your option) any later version.
#
# This program is distributed in the hope that it will be useful,
# but WITHOUT ANY WARRANTY; without even the implied warranty of
# MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
# GNU General Public License for more details.
#
# You should have received a copy of the GNU General Public License
# along with this program. If not, see <http://www.gnu.org/licenses/>.
use strict;
use warnings;
use utf8;
use Getopt::Long;
use File::Basename;
# Default values
my $indicator = $ENV{BLOCK_INSTANCE} || $ENV{KEY} || "CAPS";
my $text_on = $ENV{TEXT_ON} || $indicator;
my $text_off = $ENV{TEXT_OFF} || $indicator;
my $color_on = $ENV{COLOR_ON} || "#00FF00";
my $color_off = $ENV{COLOR_OFF} || "#222222";
my $bg_color_on = $ENV{BG_COLOR_ON};
my $bg_color_off = $ENV{BG_COLOR_OFF};
my $hide = $ENV{HIDE_WHEN_OFF} || 0;
sub help {
my $program = basename($0);
printf "Usage: %s [-c <color on>] [-C <color off>] [-b <bg color on>] [-B <bg color off>] [--hide]\n", $program;
printf " -c <color on>: hex color to use when indicator is on\n";
printf " -C <color off>: hex color to use when indicator is off\n";
printf " -b <background color on>: hex color to use when indicator is on\n";
printf " -B <background color off>: hex color to use when indicator is off\n";
printf " --hide: don't output anything when indicator is off\n";
printf "\n";
printf "Note: environment variable \$BLOCK_INSTANCE should be one of:\n";
printf " CAPS, NUM (default is CAPS).\n";
exit 0;
}
Getopt::Long::config qw(no_ignore_case);
GetOptions("help|h" => \&help,
"c=s" => \$color_on,
"C=s" => \$color_off,
"b=s" => \$bg_color_on,
"B=s" => \$bg_color_off,
"hide" => \$hide) or exit 1;
# Key mapping
my %indicators = (
CAPS => 0x00000001,
NUM => 0x00000002,
);
# Retrieve key flags
my $mask = 0;
open(XSET, "xset -q |") or die;
while (<XSET>) {
if (/LED mask:\s*([0-9a-f]+)/) {
$mask = hex $1;
last;
}
}
close(XSET);
# Determine if indicator is on or off
my $indicator_status = ($indicators{$indicator} || 0) & $mask;
# Exit if --hide and indicator is off
if ($hide and !$indicator_status) {
exit 0
}
# Output
$indicator = $indicator_status ? $text_on : $text_off;
my $fg_color = $indicator_status ? $color_on : $color_off;
my $bg_color = $indicator_status ? $bg_color_on : $bg_color_off;
if (defined $bg_color) {
printf "<span color='%s' bgcolor='%s'>%s</span>\n", $fg_color, $bg_color, $indicator;
} else {
printf "<span color='%s'>%s</span>\n", $fg_color, $indicator;
}
exit 0