Helper script for performing some useful window manipulation tasks

windowctl.sh

#!/bin/bash

# Helper script for performing some useful window manipulation tasks
# Version 1.1.2
#
# Dependencies: xdotool
#
# This script should be bound to some keyboard shortcuts, and will target
# whatever window currently has focus. For example:
#   Alt+Shift+Left  - /path/to/windowctl.sh move_l
#   Alt+Shift+Right - /path/to/windowctl.sh move_r
#   Alt+Shift+Down  - /path/to/windowctl.sh center
# This script works best if all displays are the same width, and assumes they
# are all arranged horizontally.

# wmctl doesn't take window borders into account when setting their position,
# but does include them when getting it. You can get these values by running:
# ./windowctl.sh get_offsets
# and copying the values here. Make sure the terminal you run the command in
# isn't maximized and has a little bit of room on all sides to move around.
WINDOW_BORDER_X=3
WINDOW_BORDER_Y=24

# Width in pixels of your entire workspace (all monitors combined)
# This value could be calculated, but doing so using xdotool is slow (~.5s)
DESKTOP_WIDTH=$[1920 * 3]

# Script begins

eval `xdotool getwindowfocus getdisplaygeometry --shell`
SCREEN_WIDTH=$WIDTH
SCREEN_HEIGHT=$HEIGHT

# Sets $X, $Y, $WIDTH, $HEIGHT
eval `xdotool getwindowfocus getwindowgeometry --shell`

case "$1" in
	move_l)
		# Move the current window one screen to the left
		if [[ $[$X - $SCREEN_WIDTH] -ge 0 ]]; then
			SCREEN_L=$[$[$SCREEN_WIDTH * -1] - $WINDOW_BORDER_X]
			xdotool getwindowfocus windowmove --relative -- $SCREEN_L $[$WINDOW_BORDER_Y * -1]
		fi
		;;
	move_r)
		# Move the current window one screen to the right
		if [[ $[$X + $SCREEN_WIDTH] -lt $DESKTOP_WIDTH ]]; then
			SCREEN_R=$[$SCREEN_WIDTH - $WINDOW_BORDER_X]
			xdotool getwindowfocus windowmove --relative -- $SCREEN_R $[$WINDOW_BORDER_Y * -1]
		fi
		;;
	center)
		# Move the current window to the center of the current screen
		SCREEN_CENTER_X=$[$[$[$SCREEN_WIDTH - $WIDTH] / 2] - $WINDOW_BORDER_X]
		GLOBAL_CENTER_X=$[$SCREEN_CENTER_X + $[$SCREEN_WIDTH * $[$X / $SCREEN_WIDTH]]]
		SCREEN_CENTER_Y=$[$[$SCREEN_HEIGHT / 2] - $[$HEIGHT / 2] - $WINDOW_BORDER_Y]
		xdotool getwindowfocus windowmove $GLOBAL_CENTER_X $SCREEN_CENTER_Y
		;;
	get_offsets)
		# Calculate appropriate values for window border offset
		eval `xdotool getwindowfocus getwindowgeometry --shell`
		X_START=$X
		Y_START=$Y
		xdotool getwindowfocus windowmove --sync --relative -- 0 0
		eval `xdotool getwindowfocus getwindowgeometry --shell`
		DELTA_X=$[$X - $X_START]
		DELTA_Y=$[$Y - $Y_START]
		echo WINDOW_BORDER_X=$DELTA_X
		echo WINDOW_BORDER_Y=$DELTA_Y
		xdotool getwindowfocus windowmove --relative -- $[$DELTA_X * -2] $[$DELTA_Y * -2]
		if [[ $WINDOW_BORDER_X -eq $DELTA_X && $WINDOW_BORDER_Y -eq $DELTA_Y ]]; then
			echo "# Values match -- no change needed"
		fi
		;;
	debug)
		# Print all valules that would be used in calculations
		echo WINDOW_BORDER_X=$WINDOW_BORDER_X
		echo WINDOW_BORDER_Y=$WINDOW_BORDER_Y
		echo DESKTOP_WIDTH=$DESKTOP_WIDTH
		echo SCREEN_WIDTH=$SCREEN_WIDTH
		echo SCREEN_HEIGHT=$SCREEN_HEIGHT
		echo WIDTH=$WIDTH
		echo HEIGHT=$HEIGHT
		echo X=$X
		echo Y=$Y
		;;
	*)
		echo "Valid arguments: move_l, move_r, center, get_offsets, debug"
		;;
esac