From e8657afbb623a9b72ac5874afc2376fa960a8b04 Mon Sep 17 00:00:00 2001
From: MURAOKA Taro <koron.kaoriya@gmail.com>
Date: Mon, 15 Apr 2024 23:36:47 +0900
Subject: [PATCH] Hooks to override applying motion to mouse report

for https://github.com/Yowkees/keyball/issues/559
---
 keyboards/keyball/lib/keyball/keyball.c |  8 ++++----
 keyboards/keyball/lib/keyball/keyball.h | 16 ++++++++++++++++
 2 files changed, 20 insertions(+), 4 deletions(-)

diff --git a/keyboards/keyball/lib/keyball/keyball.c b/keyboards/keyball/lib/keyball/keyball.c
index cc57e8d26a87..a19d8bc7371c 100644
--- a/keyboards/keyball/lib/keyball/keyball.c
+++ b/keyboards/keyball/lib/keyball/keyball.c
@@ -166,7 +166,7 @@ void pointing_device_driver_set_cpi(uint16_t cpi) {
     keyball_set_cpi(cpi);
 }
 
-static void motion_to_mouse_move(keyball_motion_t *m, report_mouse_t *r, bool is_left) {
+__attribute__((weak)) void keyball_on_apply_motion_to_mouse_move(keyball_motion_t *m, report_mouse_t *r, bool is_left) {
 #if KEYBALL_MODEL == 61 || KEYBALL_MODEL == 39 || KEYBALL_MODEL == 147 || KEYBALL_MODEL == 44
     r->x = clip2int8(m->y);
     r->y = clip2int8(m->x);
@@ -185,7 +185,7 @@ static void motion_to_mouse_move(keyball_motion_t *m, report_mouse_t *r, bool is
     m->y = 0;
 }
 
-static void motion_to_mouse_scroll(keyball_motion_t *m, report_mouse_t *r, bool is_left) {
+__attribute__((weak)) void keyball_on_apply_motion_to_mouse_scroll(keyball_motion_t *m, report_mouse_t *r, bool is_left) {
     // consume motion of trackball.
     int16_t div = 1 << (keyball_get_scroll_div() - 1);
     int16_t x = divmod16(&m->x, div);
@@ -223,9 +223,9 @@ static void motion_to_mouse_scroll(keyball_motion_t *m, report_mouse_t *r, bool
 
 static void motion_to_mouse(keyball_motion_t *m, report_mouse_t *r, bool is_left, bool as_scroll) {
     if (as_scroll) {
-        motion_to_mouse_scroll(m, r, is_left);
+        keyball_on_apply_motion_to_mouse_scroll(m, r, is_left);
     } else {
-        motion_to_mouse_move(m, r, is_left);
+        keyball_on_apply_motion_to_mouse_move(m, r, is_left);
     }
 }
 
diff --git a/keyboards/keyball/lib/keyball/keyball.h b/keyboards/keyball/lib/keyball/keyball.h
index 28c5cc0b66fd..7074ed372503 100644
--- a/keyboards/keyball/lib/keyball/keyball.h
+++ b/keyboards/keyball/lib/keyball/keyball.h
@@ -174,6 +174,22 @@ typedef enum {
 
 extern keyball_t keyball;
 
+//////////////////////////////////////////////////////////////////////////////
+// Hook points
+
+/// keyball_on_adjust_layout is called when the keyboard layout adjustted
+void keyball_on_adjust_layout(keyball_adjust_t v);
+
+/// keyball_on_apply_motion_to_mouse_move applies trackball's motion m to r as
+/// mouse movement.
+/// You can change the default algorithm by override this function.
+void keyball_on_apply_motion_to_mouse_move(keyball_motion_t *m, report_mouse_t *r, bool is_left);
+
+/// keyball_on_apply_motion_to_mouse_scroll applies trackball's motion m to r
+/// as mouse scroll.
+/// You can change the default algorithm by override this function.
+void keyball_on_apply_motion_to_mouse_scroll(keyball_motion_t *m, report_mouse_t *r, bool is_left);
+
 //////////////////////////////////////////////////////////////////////////////
 // Public API functions