iswindopen

#!/usr/bin/env bash
# 
# File:
#   iswindopen
# 
# Description:
#   Check if a window is open by name or class.
# 
# Usage:
#   iswindopen <window_name>
# 
#   <window_name>: case-sensitive; may contain regex
# 
# Options:
#   -c    check if a window is open by class instead of by name (case-sensitive;
#         class can be specified using the full qualified class string [i.e.
#         class and classname; e.g. "xterm.XTerm"]; does not allow regex)
# 
# Exit codes:
#   0: window is open
#   1: window is not open
#   2: no arguments error
# 

if [ "$#" -eq 0 ]; then
  exit 2
fi

while getopts :c OPT; do
  case "${OPT}" in
    c) OPT_CLASS=true;;
  esac
done
shift $((OPTIND - 1))

getWindIdsInClass() {
  echo "$(wmctrl -lx | awk -v class="${1}" '$3 ~ class {print $1}')"
}

if [ "${OPT_CLASS}" = 'true' ]; then
  if [ -n "$(getWindIdsInClass "${1}")" ]; then
    isWindOpen=true
  fi
else
  while IFS= read wind; do
    if echo "${wind}" | grep -q "${1}"; then
      isWindOpen=true
    fi
  done < <(wmctrl -l | awk '{$1=$2=$3=""; print $0}' | sed 's/^[ \t]*//')
fi

if [ "${isWindOpen}" = 'true' ]; then
  exit 0
fi

exit 1