nix/framework/dmenu-bluetooth

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#!/usr/bin/env bash
# _ _ _ _ _ _
# __| |_ __ ___ ___ _ __ _ _ | |__ | |_ _ ___| |_ ___ ___ | |_ | |__
# / _` | '_ ` _ \ / _ \ '_ \| | | |_____| '_ \| | | | |/ _ \ __/ _ \ / _ \| __|| '_ \
# | (_| | | | | | | __/ | | | |_| |_____| |_) | | |_| | __/ || (_) | (_) | |_ | | | |
# \__,_|_| |_| |_|\___|_| |_|\__,_| |_.__/|_|\__,_|\___|\__\___/ \___/ \__||_| |_|
#
# Author: Nick Clyde (clydedroid)
# dmenu support by: Layerex
#
# A script that generates a dmenu menu that uses bluetoothctl to
# connect to bluetooth devices and display status info.
#
# Inspired by networkmanager-dmenu (https://github.com/firecat53/networkmanager-dmenu)
# Thanks to x70b1 (https://github.com/polybar/polybar-scripts/tree/master/polybar-scripts/system-bluetooth-bluetoothctl)
#
# Depends on:
# Arch repositories: dmenu, bluez-utils (contains bluetoothctl)
# Constants
divider="---------"
goback="Back"
connected_icon=""
# Checks if bluetooth controller is powered on
power_on() {
if bluetoothctl show | grep -F -q "Powered: yes"; then
return 0
else
return 1
fi
}
# Toggles power state
toggle_power() {
if power_on; then
bluetoothctl power off
show_menu
else
if rfkill list bluetooth | grep -F -q 'blocked: yes'; then
rfkill unblock bluetooth && sleep 3
fi
bluetoothctl power on
show_menu
fi
}
# Checks if controller is scanning for new devices
scan_on() {
if bluetoothctl show | grep -F -q "Discovering: yes"; then
echo "Scan: on"
return 0
else
echo "Scan: off"
return 1
fi
}
# Toggles scanning state
toggle_scan() {
if scan_on; then
kill $(pgrep -f "bluetoothctl scan on")
bluetoothctl scan off
show_menu
else
bluetoothctl scan on &
echo "Scanning..."
sleep 5
show_menu
fi
}
# Checks if controller is able to pair to devices
pairable_on() {
if bluetoothctl show | grep -F -q "Pairable: yes"; then
echo "Pairable: on"
return 0
else
echo "Pairable: off"
return 1
fi
}
# Toggles pairable state
toggle_pairable() {
if pairable_on; then
bluetoothctl pairable off
show_menu
else
bluetoothctl pairable on
show_menu
fi
}
# Checks if controller is discoverable by other devices
discoverable_on() {
if bluetoothctl show | grep -F -q "Discoverable: yes"; then
echo "Discoverable: on"
return 0
else
echo "Discoverable: off"
return 1
fi
}
# Toggles discoverable state
toggle_discoverable() {
if discoverable_on; then
bluetoothctl discoverable off
show_menu
else
bluetoothctl discoverable on
show_menu
fi
}
# Checks if a device is connected
device_connected() {
device_info=$(bluetoothctl info "$1")
if echo "$device_info" | grep -F -q "Connected: yes"; then
return 0
else
return 1
fi
}
# Toggles device connection
toggle_connection() {
if device_connected "$1"; then
bluetoothctl disconnect "$1"
# device_menu "$device"
else
bluetoothctl connect "$1"
# device_menu "$device"
fi
}
# Checks if a device is paired
device_paired() {
device_info=$(bluetoothctl info "$1")
if echo "$device_info" | grep -F -q "Paired: yes"; then
echo "Paired: yes"
return 0
else
echo "Paired: no"
return 1
fi
}
# Toggles device paired state
toggle_paired() {
if device_paired "$1"; then
bluetoothctl remove "$1"
device_menu "$device"
else
bluetoothctl pair "$1"
device_menu "$device"
fi
}
# Checks if a device is trusted
device_trusted() {
device_info=$(bluetoothctl info "$1")
if echo "$device_info" | grep -F -q "Trusted: yes"; then
echo "Trusted: yes"
return 0
else
echo "Trusted: no"
return 1
fi
}
# Toggles device connection
toggle_trust() {
if device_trusted "$1"; then
bluetoothctl untrust "$1"
device_menu "$device"
else
bluetoothctl trust "$1"
device_menu "$device"
fi
}
# Prints a short string with the current bluetooth status
# Useful for status bars like polybar, etc.
print_status() {
if power_on; then
printf ''
mapfile -t paired_devices < <(bluetoothctl paired-devices | grep -F Device | cut -d ' ' -f 2)
counter=0
for device in "${paired_devices[@]}"; do
if device_connected "$device"; then
device_alias="$(bluetoothctl info "$device" | grep -F "Alias" | cut -d ' ' -f 2-)"
if [ $counter -gt 0 ]; then
printf ", %s" "$device_alias"
else
printf " %s" "$device_alias"
fi
((counter++))
fi
done
printf "\n"
else
echo ""
fi
}
# A submenu for a specific device that allows connecting, pairing, and trusting
device_menu() {
device=$1
# Get device name and mac address
device_name="$(echo "$device" | cut -d ' ' -f 3-)"
mac="$(echo "$device" | cut -d ' ' -f 2)"
# Build options
if device_connected "$mac"; then
connected="Connected: yes"
else
connected="Connected: no"
fi
paired=$(device_paired "$mac")
trusted=$(device_trusted "$mac")
options="$connected\n$paired\n$trusted\n$divider\n$goback\nExit"
# Open dmenu menu, read chosen option
chosen="$(echo -e "$options" | run_dmenu "$device_name")"
# Match chosen option to command
case $chosen in
"" | "$divider")
echo "No option chosen."
;;
"$connected")
toggle_connection "$mac"
;;
"$paired")
toggle_paired "$mac"
;;
"$trusted")
toggle_trust "$mac"
;;
"$goback")
show_menu
;;
esac
}
# Opens a dmenu menu with current bluetooth status and options to connect
show_menu() {
# Get menu options
if power_on; then
power="Power: on"
# Human-readable names of devices, one per line
# If scan is off, will only list paired devices
if [[ -n $connected_icon ]]; then
devices=$(bluetoothctl devices | grep -F Device | while read -r device; do
device_name="$(echo "$device" | cut -d ' ' -f 3-)"
mac="$(echo "$device" | cut -d ' ' -f 2)"
icon=""
if device_connected "$mac" && [[ -n $connected_icon ]]; then
icon=" $connected_icon"
fi
echo "$device_name${icon}"
done)
else
devices=$(bluetoothctl devices | grep -F Device | cut -d ' ' -f 3-)
fi
# Get controller flags
scan=$(scan_on)
pairable=$(pairable_on)
discoverable=$(discoverable_on)
# Options passed to dmenu
options="$devices\n$divider\n$power\n$scan\n$pairable\n$discoverable\nExit"
else
power="Power: off"
options="$power\nExit"
fi
# Open dmenu menu, read chosen option
chosen="$(echo -e "$options" | run_dmenu "Bluetooth")"
# Match chosen option to command
case $chosen in
"" | "$divider")
echo "No option chosen."
;;
"$power")
toggle_power
;;
"$scan")
toggle_scan
;;
"$discoverable")
toggle_discoverable
;;
"$pairable")
toggle_pairable
;;
*)
if [[ -n $connected_icon ]]; then
chosen="${chosen%% ${connected_icon}}"
fi
device=$(bluetoothctl devices | grep -F "$chosen")
# Open a submenu if a device is selected
if [[ $device ]]; then device_menu "$device"; fi
;;
esac
}
original_args=("$@")
# dmenu command to pipe into. Extra arguments to dmenu-bluetooth are passed through to dmenu. This
# allows the user to set fonts, sizes, colours, etc.
run_dmenu() {
rofi -dmenu "${original_args[@]}" -i -p "$1"
}
print_help() {
echo "usage: $0 [--help] [--status] [--connected-icon [ICON]]"
echo ""
echo "A script that generates a dmenu menu that uses bluetoothctl to connect to bluetooth devices and display status info."
echo ""
echo "options:"
echo "--help show this help message and exit"
echo "--connected-icon [ICON] add icon on device list next to connected devices"
echo "--status print a short string about current bluetooth status and exit"
}
case "$1" in
--help)
print_help
;;
--connected-icon)
if [[ -z $2 ]]; then
connected_icon=""
else
connected_icon="$2"
fi
show_menu
;;
--status)
print_status
;;
*)
show_menu
;;
esac