#!/bin/sh

has_ewmh_wm()
{
    local name
    local id
    local child_id
    echo has_ewmh_wm
        
    # If property does not exist, "id" will contain "no such atom on any window"
    read name id <<< $(xprop -root 32x ' $0\n' _NET_SUPPORTING_WM_CHECK)
    read name child_id <<< $(xprop -id "${id}" 32x ' $0\n' _NET_SUPPORTING_WM_CHECK 2>/dev/null)

    if [ "${id}" != "${child_id}" ]; then
	echo wrong id: $id vs $child_id
        return 1
    fi


    return 0
}

wait_for_wm()
{
    for i in `seq 30`; do
        if has_ewmh_wm; then
            return 0
        fi

        sleep 1
    done
    return 1
}

killall xclock openbox lt-openbox
sleep 1
killall -9 xclock openbox lt-openbox
sleep 1

# Uncomment to start app before OB
#xclock &

~/tmp/openbox/openbox/openbox &
echo Waiting for _NET_SUPPORTING_WM_CHECK
wait_for_wm
echo Valid _NET_SUPPORTING_WM_CHECK found

# Uncomment to start app when _NET_SUPPORTING_WM_CHECK is found
xclock