From: Po Lu <luangruo@yahoo.com>
Date: Tue, 30 Nov 2021 12:49:59 +0000 (+0800)
Subject: Fix pixel scrolling again
X-Git-Tag: emacs-29.0.90~3635^2~13
X-Git-Url: http://git.eshelyaron.com/gitweb/?a=commitdiff_plain;h=55151f94ea333479f61259890dad46bcf18ede3e;p=emacs.git

Fix pixel scrolling again

* lisp/pixel-scroll.el (pixel-scroll-precision-scroll-down): Fix
confusion about absolutivity of `window-edges'.
---

diff --git a/lisp/pixel-scroll.el b/lisp/pixel-scroll.el
index cc90be021f7..5ffa8caa71c 100644
--- a/lisp/pixel-scroll.el
+++ b/lisp/pixel-scroll.el
@@ -424,10 +424,11 @@ the height of the current window."
 (defun pixel-scroll-precision-scroll-up (delta)
   "Scroll the current window up by DELTA pixels."
   (let* ((edges (window-edges nil t nil t))
-         (max-y (- (nth 3 edges) 1
+         (max-y (- (nth 3 edges)
+                   (nth 1 edges)
                    (window-tab-line-height)
                    (window-header-line-height)))
-         (usable-height (- max-y (nth 1 edges))))
+         (usable-height max-y))
     (when-let* ((posn (posn-at-point))
 	        (current-y (+ (cdr (posn-x-y posn))
 		              (line-pixel-height))))