Add a new argument to 'recenter' to allow finer control of redisplay

* window.c (recenter): Add a new REDISPLAY argument to allow the
caller to control the redisplay behavior.  'recenter' will only
redisplay the frame if this new arg and 'recenter-redisplay' are
both non-nil.
(recenter-top-bottom): Pass an extra non-nil argument to
'recenter' to force a redisplay.  (Bug#31325)

1 files changed, 5 insertions, 0 deletions

diff --git a/etc/NEWS b/etc/NEWS
index 63c59ae9218..d5f1abb5feb 100644
--- a/etc/NEWS
+++ b/etc/NEWS
@@ -690,6 +690,11 @@ manual for more details.
 * Lisp Changes in Emacs 27.1
 
 +++
+** The function 'recenter' accepts an additional optional argument.
+If the optional second argument is nil, recenter will not redisplay
+the frame regardless of the value of 'recenter-redisplay'.
+
++++
 ** New functions 'major-mode-suspend' and 'major-mode-restore'.
 Use them when switching temporarily to another major mode, e.g. for
 'hexl-mode', or to switch between 'c-mode' and 'image-mode' in XPM.