From: Po Lu <luangruo@yahoo.com>
Date: Wed, 15 Dec 2021 02:27:27 +0000 (+0800)
Subject: Work around pixel scrolling issues when line numbers are displayed
X-Git-Tag: emacs-29.0.90~3593^2~2
X-Git-Url: http://git.eshelyaron.com/gitweb/?a=commitdiff_plain;h=861eee42418f510679a6e3ae1ee433353194cb68;p=emacs.git

Work around pixel scrolling issues when line numbers are displayed

* lisp/pixel-scroll.el (pixel-point-and-height-at-unseen-line):
Compare start position against line number display width
instead.
---

diff --git a/lisp/pixel-scroll.el b/lisp/pixel-scroll.el
index 142ebf9c65a..fa0185b16e9 100644
--- a/lisp/pixel-scroll.el
+++ b/lisp/pixel-scroll.el
@@ -417,7 +417,8 @@ window, and the pixel height of that line."
     (set-window-start nil pos0 t)
     (set-window-vscroll nil vscroll0 t)
     (when (and line-height
-               (> (car (posn-x-y (posn-at-point pos0))) 0))
+               (> (car (posn-x-y (posn-at-point pos0)))
+                  (line-number-display-width t)))
       (setq line-height (- line-height
                            (save-excursion
                              (goto-char pos0)