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#!/usr/bin/perl
# i3status-wrapper -- wrapper for i3status(1), plus other monitoring
#
# Copyright (C) 2019, 2021-2022 Sean Whitton
#
# 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 5.032;
use strict;
use warnings;
use lib "$ENV{HOME}/src/dotfiles/perl5";
use JSON;
use Local::Desktop;
use IO::Pipe;
use IPC::Shareable;
use Sys::Hostname;
$| = 1;
my $pipe = IO::Pipe->new;
my $i3status = fork // die "couldn't fork()!";
unless ($i3status) {
$pipe->writer;
open STDOUT, ">&=", $pipe->fileno
or die "couldn't open child's STDOUT";
exec "i3status";
}
tie my %info, "IPC::Shareable", undef, { destroy => 1 };
unless (fork // die "couldn't fork()!") {
$pipe->reader;
open STDIN, "<&=", $pipe->fileno
or die "couldn't reopen child's STDIN!";
# Following based on Michael Stapelberg's sample i3status-wrapper script.
my $hostname = hostname;
my $username = $ENV{LOGNAME} || $ENV{USER} || getpwuid($<);
# Skip the first line which contains the version header.
print scalar <>;
# The second line contains the start of the infinite array.
print scalar <>;
# Read lines forever, ignore a comma at the beginning if it exists.
while (my ($statusline) = (<> =~ /^,?(.*)/)) {
my @blocks = @{ decode_json $statusline };
unshift @blocks,
{
name => "caffeinated",
full_text => "Caffeinated: " . $info{caffeinated_name} }
if $info{caffeinated_name};
unshift @blocks,
{ name => "hostinfo", full_text => $username . "@" . $hostname };
print encode_json(\@blocks) . ",\n";
}
}
my $caffeinated_id;
open my $events, "-|",
$wmipc, "-t", "subscribe", "-m", '[ "window", "workspace" ]';
my $workspaces = @{ decode_json `$wmipc -t get_workspaces` };
$workspaces > 1 or wsbuttons("no");
while (my $event = decode_json <$events>) {
if ($event->{change} eq "mark") {
if (grep $_ eq "caffeinated", $event->{container}{marks}->@*) {
$caffeinated_id = $event->{container}{id};
$info{caffeinated_name} = $event->{container}{name};
kill USR1 => $i3status;
} elsif ($caffeinated_id
and $caffeinated_id == $event->{container}{id}) {
undef $caffeinated_id, undef $info{caffeinated_name};
kill USR1 => $i3status;
}
} elsif ($event->{change} eq "init") {
++$workspaces == 2 and wsbuttons("yes");
} elsif ($event->{change} eq "empty") {
--$workspaces == 1 and wsbuttons("no");
# For simplicity, only fresh-workspace script calls compact_workspaces
# atm. For greater consistency we could call it here, too, without
# supplying a leave_gap argument.
# compact_workspaces;
}
}
sub wsbuttons {
return unless $ENV{XDG_CURRENT_DESKTOP} eq "sway";
wmipc "bar bar-0 workspace_buttons $_[0]";
}
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