From: Kim F. Storm <storm@cua.dk>
Date: Mon, 12 Jun 2006 22:37:31 +0000 (+0000)
Subject: (Forcing Redisplay): Add redisplay-preemption-period.
X-Git-Tag: emacs-pretest-22.0.90~1978
X-Git-Url: http://git.eshelyaron.com/gitweb/?a=commitdiff_plain;h=a9d2c44760b46331f72fb5ba667b34e47ed642b2;p=emacs.git

(Forcing Redisplay): Add redisplay-preemption-period.
---

diff --git a/lispref/display.texi b/lispref/display.texi
index 1b8e66ec23e..3d1d3de7b6d 100644
--- a/lispref/display.texi
+++ b/lispref/display.texi
@@ -94,6 +94,19 @@ at all if input is available before it starts.  Most of the time, this
 is exactly what you want.  However, you can prevent preemption by
 binding @code{redisplay-dont-pause} to a non-@code{nil} value.
 
+@tindex redisplay-preemption-period
+@defvar redisplay-preemption-period
+This variable controls how often Emacs checks for new input during
+redisplay.  The default setting is to check for input every 0.1
+seconds after redislpay has started.  If input arrives, redisplay
+stops, and all available input is processed before redisplay starts over.
+  If this variable is set to @code{nil}, redisplay--once started--is never
+preempted by input.
+
+@emph{Note} that this variable is only available if Emacs is built
+with support for sub-second timers.
+@end defvar
+
 @tindex redisplay-dont-pause
 @defvar redisplay-dont-pause
 If this variable is non-@code{nil}, pending input does not