#!/bin/bash

# enter / fn+enter=esc
# page down / fn+pdn=tab
# page up / fn+pup=rotate
# fn / fn+fn=menu

# using xreplay is not ideal, and X-specific
# perhaps we can synthesize keypress using /dev/input/uinput ?

case $1 in
    enter )
        if test -f /tmp/tablet-fn ; then
            echo -n "<Escape>" | xreplay CurrentWindow
            rm /tmp/tablet-fn ;
        else
            echo -n "<Return>" | xreplay CurrentWindow ;
        fi
        ;;

    down )
        if test -f /tmp/tablet-fn  ; then
            echo -n "<Tab>" | xreplay CurrentWindow
            rm /tmp/tablet-fn ;
        else
            echo -n "<Down>" | xreplay CurrentWindow ;
        fi
        ;;

    up )
        if test -f /tmp/tablet-fn ; then
            ## with a working ranr extension, we could rotate display
            ## xrandr -o
            rm /tmp/tablet-fn ;
        else
            echo -n "<Up>" | xreplay CurrentWindow ;
        fi
        ;;

    fn )
        if test -f /tmp/tablet-fn ; then
            rm /tmp/tablet-fn ;
        else
            touch /tmp/tablet-fn ;
        fi
        ;;

    key )
        xscreensaver-command -lock
        ;;
# avoid doing xscreensaver-command -lock if we are already locked;
# unlock ?  or perhaps do something different

    * )
        echo "usage: $0 enter|down|up|fn|key"
        ;;
esac