klimbim/bash/center-window.sh

#!/bin/bash

# Klimbim Software collection, A bag full of things
# Copyright (C) 2011-2023 Johannes 'Banana' Keßler
#
# This program is free software: you can redistribute it and/or modify
# it under the terms of the GNU General Public License as published by
# the Free Software Foundation, either version 3 of the License, or
# (at your option) any later version.
#
# This program is distributed in the hope that it will be useful,
# but WITHOUT ANY WARRANTY; without even the implied warranty of
# MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
# GNU General Public License for more details.
#
# You should have received a copy of the GNU General Public License
# along with this program.  If not, see <https://www.gnu.org/licenses/>.

# Center the current actve window based on screen and window size
# create a kyboard shortcut to execute the script

# needs the following applications
# xdotool
# xdpyinfo

# This program is free software: you can redistribute it and/or modify
# it under the terms of the COMMON DEVELOPMENT AND DISTRIBUTION LICENSE
#
# You should have received a copy of the
# COMMON DEVELOPMENT AND DISTRIBUTION LICENSE (CDDL) Version 1.0
# along with this program.  If not, see http://www.sun.com/cddl/cddl.html

# 2019 https://www.bananas-playground.net

screenWidth=$(xdpyinfo | awk -F" |x" '/dimensions:/ { print $7 }')
screenHeight=$(xdpyinfo | awk -F" |x" '/dimensions:/ { print $8 }')
window_id=$(xdotool getactivewindow)

width=$(xdotool getwindowgeometry $window_id | awk -F" |x" '/Geometry:/ { print $4 }')
height=$(xdotool getwindowgeometry $window_id | awk -F" |x" '/Geometry:/ { print $5 }')

newPosX=$((screenWidth/2-width/2))
newPosY=$((screenHeight/2-height/2))

xdotool getactivewindow windowmove "$newPosX" "$newPosY"