Re: How to know if a key is pressed without getting it?

[Vinicius Jose Latorre <viniciusjl@ig.com.br>]

>> Does anyone know how to know if a key is pressed without getting it in Emacs
>> (like kbhit like function)?
>>      
> I don't know kbhit, so I'm not sure what you're asking.
> But it sounds like something that can't be done right, so if you give us
> a more general description of the problem at hand, we may be able to
> suggest a different solution.

The kbhit (keyboard hit) is a function that returns true if a key was 
pressed.

This function is used in Windows but there is also kbhit implementation 
for GNU/Linux.

The problem that I'm trying to fix is an specific slow down in 
whitespace when user holds space key pressed at end of a line. The slow 
down is caused by whitespace which call jit-font-lock-refontify each 
time the user press a space at end of line. If it is possible to detect 
that user is still pressing a key, I could fix the slow down by not 
calling jit-font-lock-refontify while user is pressing a key.

BTW, calling jit-font-lock-refontify in Emacs 22 didn't cause any slow 
down, but this happens in Emacs 23 and 24. Probably 
jit-font-lock-refontify or some part of font-lock was modified in Emacs 23.