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bug#19060: [FIX INCLUDED] Off-by-one-line scrolling bug in window_scroll


From: Angelo Graziosi
Subject: bug#19060: [FIX INCLUDED] Off-by-one-line scrolling bug in window_scroll_pixel_based
Date: Sat, 15 Nov 2014 15:10:26 +0100
User-agent: Mozilla/5.0 (Windows NT 6.1; WOW64; rv:31.0) Gecko/20100101 Thunderbird/31.2.0

Martin Rudalics wrote:
IIUC we have a rounding issue which makes us go by one line too
far or too few when scrolling up and your patch compensates that
rounding issue by putting it back into that window_box_height (w) / dy
calculation.

Apparently, this seem related, in some way, to what I flagged here:

 http://lists.gnu.org/archive/html/bug-gnu-emacs/2014-11/msg00621.html

..or not?

Ciao,
 Angelo.





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