Script to maximize and minimize an X window from the command line

wmax.sh

maxi() {
        if [[ "$1" =~ ^0x[0-9a-f]+$ ]]; then
                wmctrl -i -r "$1" -b toggle,maximized_vert,maximized_horz
                # the window will be in the foreground, but not given focus
        else
                echo "No valid window supplied: got [$1]"
        fi
}

die() {
        echo "$*"
        exit 1
}

which wmctrl >/dev/null 2>&1 || die "Please install 'wmctrl'"

if [[ -z "$*" ]]; then
        wmctrl -l
        echo "--- Provide the ID or part fo the name of a window ---"
        
elif [[ "$1" =~ ^0x ]]; then
        maxi "$1"

else
        maxi "$(wmctrl -l | grep "$1" | grep -oP '^0x\S+')"
fi