t2

#!/bin/sh

# t2 - PLACEMENT DAY

# Special thanks to grocid for gtile, on which this project is heavily based.
# https://github.com/grocid/gtile

# Usage: t2 PLACEMENT [margin]

# The script takes one mandatory argument: a 4-character string that defines
# the placement of the window. The substrings are explained in the code comments
# that accompany each variable.

# The optional second argument defines the padding margin between
# windows. The default value is wide but maintains decent readability on
# large screens.

# The script is generally pretty easy to extend for more general cases,
# such as using more than 2 non-fullscreen vertical slices to tile or using
# hexadecimal letters to allow for more than 9 horizontal slices.
# I may eventually write them in myself if demand is there, but note that
# these exceed my own use case, so motivation is weak at the moment.

# Since it was written especially with MATE in mind, it has a built-in
# safeguard to prevent accidentally tiling the Caja desktop window, but this
# can easily be  accomplished for the desktop/root-like windows of other
# environments as well.

if [ "$(xdotool getactivewindow getwindowname)" = "x-caja-desktop" ]
then
	echo "Yeah, not movin' that one."
	exit 2
fi

# Config - Change these to match your own environment ##########################

# You guessed it.
screen_width=7680

# If and only if you have a *bottom* panel.
panel_height=24

# This is a stupid way to format this, but it's also in prep to re-write
# it to be grabbed by xrandr.
screen_height=$(( 2160 - $panel_height ))


# Tiling preferences ###########################################################

# [0-9] Number of horizontal tile slices
divs=${1:0:1}

# [0-9] First horizontal slice to occupy
x0=$(( ${1:1:1} - 1 ))

# [0-9] Last horizontal slice to occupy
# (Note that the script will fail out if $x0 > $x1.
# $x0 = $x1 is acceptable and gives a single-slice-width
# window.
x1=$(( ${1:2:1} - 1 ))

# [fhl] Vertical placement
# l=lower half-screen
# h=higher half-screen
# f=fullscreen
yp=${1:3:1}

margin=${margin:-48}

if [ ! -z "$2" ]
then
	margin="$2"
fi

# Window Placement #############################################################

# Basic (/single-)tile width.
t_width=$(( $(( $screen_width / $divs )) - $(( $(( $divs + 1 )) * $margin )) / $divs ))

# Horizontal placement of the left edge.
c=$(( $x0 * $(( $t_width + $margin )) + $margin ))

width=$(( $(( $x1 - $x0 + 1 )) * $t_width +  $(( $(( $x1 - $x0 )) * $margin )) ))

case "$yp" in
	"h")
		height=$(( $(( $screen_height - $(( 3 * $margin )) )) / 2 ))
                # Vertical placement of the upper edge.
		d=$margin
		;;
	"f")
		height=$(( $screen_height - $(( 2 * $margin )) ))
		d=$margin
		;;
	"l")
		height=$(( $(( $screen_height - $(( 3 * $margin )) )) / 2 ))
		d=$(( $height + 2 * $margin ))
		;;
	*)
		echo "Usage: $(basename $0) [0-9][0-9][0-9][flh]"
		exit 3
		;;
esac

xdotool getactivewindow windowsize $width $height windowmove $c $d

unset width height c d

exit 0