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|
#!/usr/bin/env perl
use strict;
use warnings;
use 5.010;
use IO::Select;
use IO::Socket::UNIX;
use JSON::PP;
my $i3status = get_i3status_handle();
my $ipc = get_ipc_handle();
$|++;
say "[]";
my $select = IO::Select->new;
$select->add($i3status);
$select->add($ipc);
my $current_data;
while (my @ready = $select->can_read) {
for my $fh (@ready) {
if ($fh == $i3status) {
handle_i3status(scalar <$fh>);
}
elsif ($fh == $ipc) {
handle_ipc(receive_ipc_message($fh));
}
else {
die "???";
}
}
}
sub get_i3status_handle {
open my $i3status, '-|', 'i3status';
print scalar(<$i3status>);
print scalar(<$i3status>);
return $i3status;
}
sub handle_i3status {
$_ = shift;
s/^,//;
my $data = decode_json($_);
my %line = map { $_->{name} => $_ } @$data;
my $line = [
grep {
$_->{name} eq 'wireless' || $_->{name} eq 'ethernet'
? $_->{instance} ne $_->{full_text}
: $_->{name} ne 'load'
} @$data
];
my %discharge_rate;
my %battery_index;
my $index = 0;
for my $item (@$line) {
if ($item->{name} eq 'wireless' || $item->{name} eq 'ethernet') {
my $iface = $item->{instance};
my ($up, $down) = map { net_rate($iface, $_) } 'rx', 'tx';
my $rate = sprintf("%6s/%6s", map { human_bytes($_) } $up, $down);
$item->{full_text} =~ s{^($iface:)}{$1 $rate};
$item->{color} =
$up + $down >= 512000 ? '#FF0000'
: $up + $down >= 51200 ? '#FFFF00'
: $up + $down >= 5120 ? '#00FF00'
: '#FFFFFF';
}
if ($item->{name} eq 'cpu_usage') {
my ($val) = $line{load}{full_text} * 100 / ncpu();
$item->{color} =
$val >= 50 ? '#FF0000'
: $val >= 25 ? '#FFFF00'
: $val >= 5 ? '#00FF00'
: '#FFFFFF';
}
if ($item->{name} eq 'battery') {
my ($state, $val) = $item->{full_text} =~ /(\w+) (\d+(?:\.\d+))%/;
my ($rate) = $item->{full_text} =~ /\(.* (.*)W\)/;
$rate *= -1 if defined($rate) && $state ne 'BAT';
$rate //= 0;
$discharge_rate{$item->{instance}} = $rate;
$battery_index{$item->{instance}} = $index;
$item->{full_text} =~ s/\((.*) (.*)W\)/\($1\)/;
$item->{full_text} =~ s/ \(\)//;
$item->{color} =
!defined($val) ? '#FFFFFF'
: $val >= 80 ? '#00FF00'
: $state ne 'BAT' ? '#FFFFFF'
: $val >= 40 ? '#FFFFFF'
: $val >= 15 ? '#FFFF00'
: $val >= 5 ? '#CD0000'
: '#FF0000';
}
$index++;
}
my @batteries = sort { $battery_index{$b} <=> $battery_index{$a} }
keys %battery_index;
for my $battery (@batteries) {
next unless $discharge_rate{$battery};
splice @$line, $battery_index{$battery} + 1, 0, {
name => 'battery_discharge',
full_text => sprintf("%0.2fW", $discharge_rate{$battery}),
color => (
$discharge_rate{$battery} < 6 ? '#FFFFFF'
: $discharge_rate{$battery} < 10 ? '#00FF00'
: $discharge_rate{$battery} < 14 ? '#FFFF00'
: '#FF0000'
),
};
}
my $weather_file = "$ENV{HOME}/.cache/weather";
if (-r $weather_file && -f $weather_file) {
my $weather = slurp($weather_file);
chomp($weather);
my ($temp) = $weather =~ /\d+%.*?(-?\d+)C.*?-?\d+C/;
unshift @$line, {
name => 'weather',
full_text => $weather,
color => (
$temp >= 30 ? '#FF0000'
: $temp >= 25 ? '#FFFF00'
: $temp >= 20 ? '#00FF00'
: $temp >= 10 ? '#FFFFFF'
: $temp >= 0 ? '#CDCDFF'
: '#0000FF'
),
};
}
$current_data = $line;
show_status();
}
sub get_ipc_handle {
chomp(my $path = qx(i3 --get-socketpath));
my $sock = IO::Socket::UNIX->new(Peer => $path);
$sock->write(format_ipc_message(2, q{["window", "workspace"]}));
my ($type, $payload) = receive_ipc_message($sock);
die "Couldn't subscribe: ($type) $payload"
unless $type == 2 && decode_json($payload)->{success};
return $sock;
}
sub handle_ipc {
my ($type, $payload) = @_;
show_status();
}
sub format_ipc_message {
my ($type, $payload) = @_;
my $len = do { use bytes; length($payload) };
return "i3-ipc" . pack("LL", $len, $type) . $payload;
}
sub receive_ipc_message {
my ($sock) = @_;
$sock->read(my $magic, 6);
die "unknown response: $magic" unless $magic eq 'i3-ipc';
$sock->read(my $len, 4);
$len = unpack("L", $len);
$sock->read(my $type, 4);
$type = unpack("L", $type);
$sock->read(my $payload, $len);
return ($type, $payload);
}
sub show_status {
my @line = @$current_data;
unshift @line, { name => 'title', full_text => get_title() };
say "," . encode_json(\@line);
}
sub get_title {
my $node = find(decode_json(`i3-msg -t get_tree`));
if ($node->{window}) {
return $node->{name};
}
else {
return '-none-';
}
}
sub find {
my ($t) = @_;
if ($t->{focused}) {
return $t;
}
for my $subtree (@{ $t->{nodes} }, @{ $t->{floating_nodes} }) {
my $found = find($subtree);
return $found if $found;
}
return;
}
{
my %last_bytes;
sub net_rate {
my ($iface, $which) = @_;
my $stat_file = "/sys/class/net/$iface/statistics/${which}_bytes";
chomp(my $bytes = slurp($stat_file));
my $prev = $last_bytes{$iface}{$which};
$last_bytes{$iface}{$which} = $bytes;
return 0 unless defined $prev;
return $bytes - $prev;
}
}
sub ncpu {
scalar grep { !/^#/ } `lscpu -p=cpu`
}
sub human_bytes {
my ($bytes) = @_;
my @prefixes = ('', qw(k M G T));
my $prefix_index = 0;
while ($bytes > 512) {
$bytes /= 1024;
$prefix_index++;
}
my $prec = ($prefix_index == 0 ? 0 : 1);
return sprintf("%0.${prec}f%sB", $bytes, $prefixes[$prefix_index]);
}
sub slurp {
open my $fh, '<:encoding(UTF-8)', $_[0] or die "Couldn't open $_[0]: $!";
if (wantarray) {
<$fh>
}
else {
local $/;
<$fh>
}
}
|
