1 files changed, 81 insertions, 0 deletions
diff --git a/lib/Battery.pm b/lib/Battery.pm
new file mode 100644
index 0000000..3936b9b
--- /dev/null
+++ b/lib/Battery.pm
@@ -0,0 +1,81 @@
+package Battery;
+use strict;
+use warnings;
+use 5.016;
+use Gtk2;
+
+sub new {
+    my ($class)=@_;
+
+    my $self = bless {},$class;
+
+    my $window = Gtk2::Window->new('toplevel');
+    $window->set_accept_focus(0);
+    $window->set_decorated(0);
+    $window->set_has_frame(0);
+    $window->set_skip_pager_hint(1);
+    $window->set_skip_taskbar_hint(1);
+    $window->set_type_hint('utility');
+    $window->set_default_size(300,25);
+    $window->set_resizable(1);
+
+    $self->{w}=$window;
+
+    my $bar = Gtk2::ProgressBar->new();
+    $bar->set_orientation('left-to-right');
+    $bar->set_pulse_step(0.01);
+    $self->{b}=$bar;
+
+    $window->add($bar);
+
+    $window->signal_connect(delete_event => \&quit);
+
+    Glib::Timeout->add(1,\&update,$self);
+
+    return $self;
+}
+
+sub show {
+    $_[0]->{w}->show_all;
+}
+
+sub quit {
+    Gtk2->main_quit;
+}
+
+sub get_battery_stats {
+    open my $fh,'<','/sys/class/power_supply/BAT1/uevent';
+    my %ret;
+    while (my $line=<$fh>) {
+        chomp $line;
+        my ($name,$value) = $line =~ m{\A POWER_SUPPLY_(.*?) = (.*) \z}x;
+        $ret{lc($name)}=$value;
+    }
+    return \%ret;
+}
+
+sub _format_time {
+    my ($t) = @_;
+    my $h=int($t);
+    my $m=int(($t-$h)*60);
+    return sprintf q{%dh%d},$h,$m;
+}
+
+sub update {
+    my ($self) = @_;
+
+    my $bs=get_battery_stats;
+    my $e=$bs->{energy_now}/$bs->{energy_full};
+    my $t=$bs->{energy_now}/$bs->{power_now};
+    my $tot=$bs->{energy_full}/$bs->{power_now};
+
+    $self->{b}->set_text(
+        sprintf '%s/%s %.0f%%',
+        _format_time($t),
+        _format_time($tot),
+        100*$e
+    );
+    $self->{b}->set_fraction($t/$tot);
+}
+
+1;