From: Vinicius Jose Latorre <viniciusjl@ig.com.br>
To: Stefan Monnier <monnier@iro.umontreal.ca>
Cc: "GNU Emacs \(devel\)" <emacs-devel@gnu.org>
Subject: Re: How to know if a key is pressed without getting it?
Date: Sun, 26 Sep 2010 19:41:29 -0300 [thread overview]
Message-ID: <4C9FCC19.5020804@ig.com.br> (raw)
In-Reply-To: <jwveicgywx4.fsf-monnier+emacs@gnu.org>
>> 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.
next prev parent reply other threads:[~2010-09-26 22:41 UTC|newest]
Thread overview: 13+ messages / expand[flat|nested] mbox.gz Atom feed top
2010-09-26 15:02 How to know if a key is pressed without getting it? Vinicius Jose Latorre
2010-09-26 15:53 ` Óscar Fuentes
2010-09-26 22:15 ` Stefan Monnier
2010-09-26 22:41 ` Vinicius Jose Latorre [this message]
2010-09-26 23:11 ` Stefan Monnier
2010-09-26 23:25 ` Lennart Borgman
2010-09-27 1:08 ` Vinicius Jose Latorre
2010-09-27 20:30 ` Stefan Monnier
2010-09-27 1:20 ` Ted Zlatanov
2010-09-26 22:46 ` Andreas Schwab
2010-09-26 23:21 ` Vinicius Jose Latorre
2010-09-26 23:36 ` Stefan Monnier
2010-09-27 0:29 ` Vinicius Jose Latorre
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