#!/usr/bin/env bash

# Date format, for use as the prompt.
date=$(date +"%Y.%m.%d..%H.%M")

# dmenu cannot display more than 30 lines, to avoid screen clutter. Only
# relevant if you have more than 30 windows open.
height=$(wmctrl -l | wc -l)
if [[ $height -gt 30 ]]
	then heightfit=30
	else heightfit=$height
fi

num=$(wmctrl -l \
    | sed 's/  / /' \
    | cut -d " " -f 4- \
    | nl -w 3 -n rn \
    | sed -r 's/^([ 0-9]+)[ \t]*(.*)$/\1 - \2/' \
    | dmenu -i -p "$date" -l $heightfit \
    | cut -d '-' -f -1
)
[[ -z "$num" ]] && exit
wmctrl -l | sed -n "$num p" | cut -c -10 | xargs wmctrl -i -a