Physical keyboard events

[Cecilio Pardo]

Hello,

I'm planning to implement physical key press/release events for emacs.
I would add a new element to 'enum event_kind', that in turn would
send a new input event. This input event will be bound in
'special-event-map' so that it will not modify the normal flow of
keyboard input. Platform dependent code would send these events
on key press and release.

Then a lisp fuction can be bound to this on the special-event-map, to
implement the detection of:

- double/triple tap on Shift, Control, Alt, etc
- Long presses on Shift, Control, Alt, etc.

This actions could be bound to commands, or could add a modififer
(Super, Hyper) to next commands.

And make Tetris independent of the keyboard repeat rate :)

Has something like this been discussed before, so I can check?