Add keyboard_layout_switcher program, use it for click action on waybar and as bindsym.

.gitignore

@@ -1,2 +1,3 @@
 *~
 */lnch
+*/keyboard_layout_switcher

sourcecode/Makefile

@@ -1,8 +1,18 @@
-.PHONY: all lnch
+BUILD_DIR  = ../script/.local/bin
 
-all: lnch
+GOSRC      = $(wildcard *.go)
+GOTARGET   = $(GOSRC:%.go=$(BUILD_DIR)/%)
 
-lnch: ../script/.local/bin/lnch
+TARGETS    = $(GOTARGET)
 
-../script/.local/bin/%: %.go
+.PHONY: all go clean
+
+all: go
+
+go: $(GOTARGET)
+
+$(BUILD_DIR)/%: %.go
 	go build -o $@ $<
+
+clean:
+	rm -f $(TARGETS)

sourcecode/keyboard_layout_switcher.go

@@ -0,0 +1,80 @@
+package main
+
+import (
+	"fmt"
+	"strings"
+	"strconv"
+	"encoding/json"
+	"os/exec"
+	"log"
+)
+
+func main() {
+	// collecting the JSON output from swaymsg
+	cmd_in := exec.Command("swaymsg", "--raw", "--type", "get_inputs")
+	stdout, err := cmd_in.Output()
+	if err != nil {
+		log.Fatal(err)
+	}
+
+	// struct that represents the Input
+	type Input struct {
+		Identifier, Name string
+		Vendor, Product int
+		Type string
+		Xkb_Layout_Names []string
+		Xkb_Active_Layout_Index int
+		Xkb_Active_Layout_Name string
+	}
+
+	// JSON decoder and getting the first token ('[')
+	dec := json.NewDecoder(strings.NewReader(string(stdout)))
+	_, err = dec.Token()
+	if err != nil {
+		log.Fatal(err)
+	}
+
+	// filtering amongst the keeyboards for the one with the most layouts setup
+	max_length := 0
+	var keyboard_input Input
+	for dec.More() {
+		var input Input
+		err := dec.Decode(&input)
+		if err != nil {
+			log.Fatal(err)
+		}
+
+		length := len(input.Xkb_Layout_Names)
+
+		if input.Type == "keyboard" && length > max_length {
+			max_length = length
+			keyboard_input = input
+		}
+	}
+
+	// finding the index of the input
+	var current_index int
+	for i, layout := range keyboard_input.Xkb_Layout_Names {
+		if keyboard_input.Xkb_Active_Layout_Name == layout {
+			current_index = i
+			break
+		}
+	}
+
+	// setting the next index of the output
+	var next_index int
+	if current_index < (len(keyboard_input.Xkb_Layout_Names) - 1) {
+		next_index = current_index + 1
+	} else {
+		next_index = 0
+	}
+
+	// setting the new layout index
+	cmd_out := exec.Command("swaymsg", "input", keyboard_input.Identifier, "xkb_switch_layout", strconv.Itoa(next_index))
+	_, err = cmd_out.Output()
+	if err != nil {
+		log.Fatal(err)
+	} else {
+		fmt.Printf("%v switched to layout %v successfully.\n", keyboard_input.Name, keyboard_input.Xkb_Layout_Names[next_index])
+	}
+}

wm/.config/sway/config

@@ -42,8 +42,8 @@ bindsym $mod+Shift+e exec swaynag -t warning -m 'You pressed the exit shortcut.
 set $keyboard "1:1:AT_Translated_Set_2_keyboard"
 input $keyboard {
 	xkb_layout "us,br"
-	xkb_options grp:win_space_toggle
 }
+bindsym $mod+Space exec keyboard_layout_switcher
 # Touchpad
 set $touchpad "1739:31251:SYNA2393:00_06CB:7A13_Touchpad" 
 input $touchpad {
@@ -72,7 +72,7 @@ bindsym $mod+Shift+f exec dolphin
 bindsym $mod+Shift+q kill
 # Start launcher
 bindsym $mod+d exec $menu
-for_window [title="launcher"] floating enable; border none
+for_window [title="launcher"] focus, floating enable, border none
 # Drag floating windows by holding down $mod and left mouse button.
 # Resize them with right mouse button + $mod.
 # Despite the name, also works for non-floating windows.
@@ -80,6 +80,13 @@ for_window [title="launcher"] floating enable; border none
 # mouse button for dragging.
 floating_modifier $mod normal
 
+## Enable further services for complete session
+# Polkit authenticator
+exec /usr/lib/polkit-kde-authentication-agent-1
+for_window [app_id="polkit"] focus, floating enable, border pixel 4
+# Notifications daemon
+exec mako
+
 ## Appearance
 # Default wallpaper
 output * bg /usr/share/backgrounds/sway/Sway_Wallpaper_Blue_1920x1080.png fill
@@ -216,18 +223,18 @@ for_window [app_id="waybar" floating] {
 ## Pre-configured workspaces
 # Music
 exec swaymsg 'workspace media; layout tabbed'
-for_window [class="spotify"] move container to workspace $wsm
+for_window [app_id="spotify"] move container to workspace $wsm
 # Work
 exec swaymsg 'workspace nth; layout tabbed'
-assign [class="Kicad"] $wsn
+assign [app_id="Kicad"] $wsn
 assign [title="CubeMX"] $wsn
 # PDF
 exec swaymsg 'workspace pdf; layout tabbed'
-assign [class="okular"] $wsp
+assign [app_id="okular"] $wsp
 # Return to first workspace
 exec swaymsg 'workspace 1;'
 
 ## Application specific settings
-for_window [class="krunner"] floating enable;
-for_window [class="konsole"] floating enable;
-for_window [class="pavucontrol"] floating enable;
+for_window [app_id="krunner"] floating enable
+for_window [app_id="konsole"] floating enable
+for_window [app_id="pavucontrol"] focus, floating enable

wm/.config/waybar/config

@@ -145,6 +145,7 @@
     },
     "custom/keyboard_layout": {
     	"format": "🎹 {}", // piano keyboard. Normal keyboard: ⌨️
-	"exec": "keyboard_layout_monitor"
+	"exec": "keyboard_layout_monitor",
+	"on-click": "keyboard_layout_switcher"
     }
 }