From 246f3cb4d2d84df7869709d0f9ae5f3e2d99d4cc Mon Sep 17 00:00:00 2001
From: =?UTF-8?q?=E3=83=95=E3=82=A3=E3=83=AB=E3=82=BF=E3=83=BC=E3=83=9A?=
 =?UTF-8?q?=E3=83=BC=E3=83=91=E3=83=BC?=
 <76888457+filterpaper@users.noreply.github.com>
Date: Mon, 25 Sep 2023 10:25:24 +0800
Subject: [PATCH] Improve directional transition of overlapping mouse keys
 (#21494)

---
 quantum/mousekey.c | 15 ++++++++++++++-
 1 file changed, 14 insertions(+), 1 deletion(-)

diff --git a/quantum/mousekey.c b/quantum/mousekey.c
index c982a2f40b..3910811752 100644
--- a/quantum/mousekey.c
+++ b/quantum/mousekey.c
@@ -389,7 +389,20 @@ void mousekey_on(uint8_t code) {
     if (mouse_timer == 0) {
         mouse_timer = timer_read();
     }
-#    endif /* #ifdef MK_KINETIC_SPEED */
+#    endif
+
+#    ifndef MOUSEKEY_INERTIA
+    // If mouse report is not zero, the current mousekey press is overlapping
+    // with another. Restart acceleration for smoother directional transition.
+    if (mouse_report.x || mouse_report.y || mouse_report.h || mouse_report.v) {
+#        ifdef MK_KINETIC_SPEED
+        mouse_timer = timer_read() - (MOUSEKEY_INTERVAL << 2);
+#        else
+        mousekey_repeat       = MOUSEKEY_MOVE_DELTA;
+        mousekey_wheel_repeat = MOUSEKEY_WHEEL_DELTA;
+#        endif
+    }
+#    endif // ifndef MOUSEKEY_INERTIA
 
 #    ifdef MOUSEKEY_INERTIA