parse_wmctrl.sh

gistfile1.txt

#!/usr/bin/env bash

####################
parse_wmctrl.sh
Author: apolopena
Desc: Get a window name by index from wmctrl
Usage: ./parse_wmctrl.sh get 3
####################

# Globals
window_list=()

get() {
    local limit ep="Error:"

    if [[ ! "$1" =~ ^[0-9]+$ ]]; then 
        echo "${ep} argument '${1}' must be a number"; exit 1
    fi

    [[ ${#window_list[@]} -eq 0 ]] && _init

    limit=$((${#window_list[@]} - 1))

    if [[ $1 -eq 0 || $1 -gt $limit ]]; then
        echo "${ep}: illegal range value: ${1}"
        echo "Legal range values are: 1 - ${limit}"
    fi

    echo "${window_list[$1]}" | cut -d ' ' -f 4
}

_init() {
    while IFS= read -r line; do
        window_list+=("$line")
    done <<< "$(wmctrl -lx)"
}


# Call functions gracefully
if declare -f "$1" > /dev/null; then "$@"; else echo "'$1' is not a known function name" >&2; exit 1; fi