Sway : Dim inactive windows.

module/Sway.nix

@@ -16,6 +16,7 @@
 		mako # Notification system.
 		networkmanagerapplet # Internet configuration.
 		pamixer pavucontrol pulseaudio # Audio.
+		sway-contrib.inactive-windows-transparency
 		wl-clipboard # Clipboard.
 	];
 
@@ -34,6 +35,7 @@
 		variables = {
 			FOOT_CONFIG = ./foot/Foot.ini;
 			SWAY_CONFIG = ./sway/module;
+			SWAY_SCRIPT_IWT = "${pkgs.sway-contrib.inactive-windows-transparency}/bin/inactive-windows-transparency.py";
 			# PATH        = [ "/etc/swaybin" ]; # NOTE: Kept as an example on PATH modification.
 		};
 	};

module/common/bash/module/Util.sh

@@ -146,7 +146,10 @@ function _twice() {
 	local period=${1}
 	local command="${@:2}"
 
-	[[ "$(cat ${file} 2> /dev/null)" = "${command}" ]] && ${command}
+	if [[ "$(cat ${file} 2> /dev/null)" = "${command}" ]]; then
+		${command}
+		return 0
+	fi
 	echo "${command}" > "${file}"
 	sleep ${period}
 	rm "${file}" 2> /dev/null

module/sway/module/20-Tiling

@@ -16,3 +16,6 @@ bindsym $mod+c layout toggle split tabbed
 
 # Fullscreen.
 bindsym $mod+f fullscreen
+
+# Dim inactive windows.
+exec $SWAY_SCRIPT_IWT --opacity 0.85