Waybar : Cycle output devices on sound click.

module/common/bash/module/Sound.nix

@@ -4,5 +4,19 @@
 		function sound() {
 			pavucontrol
 		}
+
+		# Cycle output devices.
+		function sound_output_cycle() {
+			local IFS=$'\n'
+			local current=$(pactl get-default-sink)
+			local all=($(pactl list short sinks | cut -f2))
+			local i_current=$(_index_of ''${current} ''${all})
+			local i_total=''${#all[@]}; ((i_total--))
+			local i_target=0
+
+			[[ "''${i_current}" -lt "''${i_total}" ]] && i_target=$((i_current+1))
+
+			pactl set-default-sink ''${all[''${i_target}]}
+		}
 	'';
 }

module/common/bash/module/Util.nix

@@ -119,6 +119,21 @@
 			return 1
 		}
 
+		# Find an index of an element in array.
+		# Usage: _index_of <ELEMENT> <ARRAY>
+		function _index_of() {
+			local element="''${1}"
+			local array="''${@:2}"
+			local index=0
+
+			for item in ''${array[@]}; do
+				[[ "''${item}" = "''${element}" ]] && break
+				((index++))
+			done
+
+			echo "''${index}"
+		}
+
 		# Check if inside Tmux.
 		function _is_tmux() {
 			[[ "''${TERM_PROGRAM}" = "tmux" ]]

module/desktop/waybar/config/default.nix

@@ -61,7 +61,8 @@
 				"format-icons": {
 					"default": ["", "", ""]
 				},
-				"on-click": "pavucontrol"
+				"on-click": "sound_output_cycle",
+				"on-click-right": "pavucontrol"
 			},
 			"mpris": {
 				"format": "{player_icon}  {artist} - {title}",
@@ -74,18 +75,22 @@
 				"status-icons": {
 					"paused": ""
 				},
+				"on-click-middle": "playerctl stop"
 				// "ignored-players": ["firefox"]
 			},
 			"cpu": {
 				"format": "{usage}% ({load})",
-				"tooltip": false
+				"tooltip": false,
+				"on-click": "btop"
 			},
 			"memory": {
-				"format": "{percentage}%"
+				"format": "{percentage}%",
+				"on-click": "btop"
 			},
 			"temperature": {
 				"hwmon-path": "/sys/class/hwmon/hwmon1/temp1_input",
 				"format": "{temperatureC}°C",
+				"on-click": "btop"
 			}
 		}
 	'';