From: Po Lu <luangruo@yahoo.com>
Date: Wed, 8 Dec 2021 11:44:50 +0000 (+0800)
Subject: Fix coarse scroll deltas on macOS
X-Git-Tag: emacs-29.0.90~3608^2~12
X-Git-Url: http://git.eshelyaron.com/gitweb/?a=commitdiff_plain;h=58cf601aada8cc80663c4e5e9a69ac7ce7f70b51;p=emacs.git

Fix coarse scroll deltas on macOS

* src/nsterm.m (- mouseDown): Multiply deltas as appropriate.
---

diff --git a/src/nsterm.m b/src/nsterm.m
index 5c19b0cab82..5d39be3a870 100644
--- a/src/nsterm.m
+++ b/src/nsterm.m
@@ -6658,8 +6658,10 @@ not_in_argv (NSString *arg)
                 ? ceil (fabs (delta)) : 1;
 
               scrollUp = delta > 0;
-	      x = [theEvent scrollingDeltaX];
-	      y = [theEvent scrollingDeltaY];
+	      x = ([theEvent scrollingDeltaX]
+		   * FRAME_COLUMN_WIDTH (emacsframe));
+	      y = ([theEvent scrollingDeltaY]
+		   * FRAME_LINE_HEIGHT (emacsframe));
             }
 
           if (lines == 0 && mwheel_coalesce_scroll_events)