Add a keyboard switch script

polybar-scripts/system-keyboard-switch/README.md

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+# Script: system-keyboard-switch
+
+A shell script that shows the current keyboard layout and change it to another one
+
+![switch](screenshots/switch_layout.png)
+
+## Module
+
+```ini
+[module/system-keyboard-switch]
+type = custom/script
+exec = ~/polybar-scripts/system-keyboard-switch.sh
+tail = true
+format-prefix = ""
+format-prefix-foreground = #00ff00
+format-underline = #ff0000
+click-left = "kill -USR1 $(pgrep --oldest --parent %pid%)"
+interval = 3
+```
+## Customization
+
+By default there is only `fr` or `us` layout.
+If you need to switch between other ones just change the script with your needed layouts.
+
+## Moreover
+
+I made a special module with script that do the trick.
+Alongside with the module `xkeyboard` it looks great in that order of module: `[ ... system-keyboard-menu xkeyboard ... ]`
+
+![menu-closed](screenshots/menu_layout_closed.png)
+![menu-opened](screenshots/menu_layout_opened.png)
+
+```ini
+[module/xkeyboard]
+type = internal/xkeyboard
+blacklist-0 = num lock
+
+format-prefix = ""
+
+label-layout = %layout%
+
+label-indicator-padding = 2
+label-indicator-margin = 1
+
+[module/system-keyboard-menu]
+type = custom/menu
+
+expand-right = true
+
+format-spacing = 1
+
+label-open = " #1 "
+label-close = "#2 cancel"
+label-separator = |
+
+menu-0-0 = us
+menu-0-0-exec = setxkbmap us -model pc105
+menu-0-1 = fr
+menu-0-1-exec = setxkbmap fr -model pc105
+
+menu-2-0 = cancel
+menu-2-0-exec = #mykeyboard.open.0
+
+```

polybar-scripts/system-keyboard-switch/system-keyboard-switch.sh

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+#!/bin/sh
+
+sleep_pid=0
+
+layout=$(setxkbmap -query | grep layout | awk '{print $2}')
+
+toggle() {
+    layout=$(setxkbmap -query | grep layout | awk '{print $2}')
+    if [ "$layout" = "fr" ]; then
+        layout="us"
+    elif [ "$layout" = "us" ]; then
+        layout="fr"
+    fi
+    if [ "$sleep_pid" -ne 0 ]; then
+        kill $sleep_pid >/dev/null 2>&1
+    fi
+}
+
+trap "toggle" USR1
+
+while true; do
+    setxkbmap "$layout" -model pc105
+    echo " $layout"
+    sleep 1 &
+    sleep_pid=$!
+    wait
+done