scratchpad


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#!/bin/bash

# Created By: srdusr
# Created On: Tue 07 Mar 2023 15:06:47 PM CAT
# Project: Agnostic scratchpad/dropdown terminal that works on most window managers

# Dependencies: wmctrl, xprop, xdo, xdotool
# NOTE: Ensure script is included in system's path and can therefore be invoked with the command 'scratchpad'.
#       Furthermore make sure the terminal is using x11 as a backend in wayland to allow this to work.
#       Example: wezterm.lua: enable_wayland = false,
#                 kitty.conf: linux_display_server x11

# Set the environment variables to x11 to allow working in Wayland
export GDK_BACKEND=x11
export QT_QPA_PLATFORM=xcb
export WAYLAND_DISPLAY=""
export WINIT_UNIX_BACKEND=x11

# Supported terminals and dropdown class
supported_terminals=("wezterm" "kitty" "alacritty")

# Check if any supported terminal with scratchpad class is running
for term in "${supported_terminals[@]}"; do
	if pgrep -f "$term.*--class scratchpad" >/dev/null; then
		my_term="$term"
		break
	fi
done

# If no supported terminal is running, start the first available one
if [ "$my_term" = "" ]; then
	for term in "${supported_terminals[@]}"; do
		if command -v "$term" >/dev/null 2>&1; then
			my_term="$term"
			break
		fi
	done
	if [ "$my_term" = "" ]; then
		echo "No supported terminal found." && exit 1
	fi

	# Start terminal with scratchpad class
	case "$my_term" in
	"wezterm") wezterm start --class scratchpad -e tmux new-session -A -s tmux -e bash & ;;
	"kitty") kitty --class scratchpad tmux new-session -A -s tmux -e bash & ;;
	"alacritty") alacritty --class scratchpad -e tmux new-session -A -s tmux -e bash & ;;
	esac
fi

# Get the window ID of the scratchpad terminal
id="$(xdo id -N scratchpad)"

# Toggle scratchpad terminal visibility
if [ "$id" != "" ]; then
	if xwininfo -id "$id" | grep "Map State: IsViewable" >/dev/null; then
		# Scratchpad is visible, hide it
		dimensions="$(xwininfo -id "$id" | awk '/Width:|Height:/ { printf("%s=%s;", tolower($1), $2) }')"
		xdo hide "$id" 2>/dev/null
	else
		# Scratchpad is hidden, show it and restore dimensions
		xdo show "$id"
		xdotool windowsize "$id" "$(echo "$dimensions" | tr ';' ' ')" 2>/dev/null
	fi
fi