Click a window selected by name; uses xwininfo and xdotool

winclick

#!/bin/bash

WINNAME="${1?usage: "$0" windowname}"

set -e

TMP=$(mktemp)
trap 'rm -f $TMP' EXIT

eval "$(xdotool getmouselocation --shell)"

xwininfo -name "$WINNAME" > "$TMP"
win_x=$(sed -n 's@Absolute upper-left X:\s*\([0-9]\+\)$@\1@p' "$TMP")
win_y=$(sed -n 's@Absolute upper-left Y:\s*\([0-9]\+\)$@\1@p' "$TMP")

xdotool mousemove $((win_x+10)) $((win_y+10))
xdotool click 1
xdotool mousemove "$X" "$Y"