#!/bin/sh
#
# z3bra - 2014 (c) wtfpl
# arrange windows in a tiled pattern

# default values for gaps and master area
PANEL=${PANEL:-0}
GAP=${GAP:-20}
MASTER=${MASTER:-900}

# get current window id and its borderwidth
PFW=$(pfw)
BW=$(wattr b $PFW)

# get root window's size (beware, multi-head setups...)
ROOT=$(lsw -r)
SW=$(wattr w $ROOT)
SH=$(wattr h $ROOT)

# get the number of windows to put in the stacking area
MAX=$(lsw|grep -v $PFW|wc -l)

# calculate usable screen size (without borders and gaps)
SW=$((SW - GAP - 2*BW))
SH=$((SH - GAP - 2*BW - PANEL))

Y=$((0 + GAP + PANEL))
# put current window in master area
wtp $GAP $Y $((MASTER - GAP - 2*BW)) $((SH - GAP)) $PFW

# and now, stack up all remaining windows on the right
X=$((MASTER + GAP))
W=$((SW - MASTER - GAP))
H=$((SH / MAX - GAP - 2*BW))

for wid in $(lsw|grep -v $PFW); do
    wtp $X $Y $W $H $wid
    Y=$((Y + H + GAP + 2*BW))
done