Remove everything not required for buttons

I've stripped out everything not strictly required for mouse button HID
support. This include dropping the worker thread completely, shaving
down the USB HID descriptor. Flattening the mouse/ source directory
structure and removing a bunch of event handling.

I have kept the mouse event handling separate from the other HID event
handling since I figured that was a pretty neat split. If that's a bad
idea, do tell.

I've also added a test case for mouse button emulation, since that was
untested before.

The changes have been tested on a corne (split) in usb mode. Bindings on
both the left and the right side works (with the left side as master).

app/CMakeLists.txt

@@ -24,9 +24,6 @@ target_sources(app PRIVATE src/stdlib.c)
 target_sources(app PRIVATE src/activity.c)
 target_sources(app PRIVATE src/kscan.c)
 target_sources(app PRIVATE src/matrix_transform.c)
-target_sources(app PRIVATE src/mouse/key_listener.c)
-target_sources(app PRIVATE src/mouse/main.c)
-target_sources(app PRIVATE src/mouse/tick_listener.c)
 target_sources(app PRIVATE src/sensors.c)
 target_sources_ifdef(CONFIG_ZMK_WPM app PRIVATE src/wpm.c)
 target_sources(app PRIVATE src/event_manager.c)
@@ -35,15 +32,13 @@ target_sources(app PRIVATE src/events/activity_state_changed.c)
 target_sources(app PRIVATE src/events/position_state_changed.c)
 target_sources(app PRIVATE src/events/sensor_event.c)
 target_sources(app PRIVATE src/events/mouse_button_state_changed.c)
-target_sources(app PRIVATE src/events/mouse_move_state_changed.c)
-target_sources(app PRIVATE src/events/mouse_tick.c)
-target_sources(app PRIVATE src/events/mouse_scroll_state_changed.c)
 target_sources_ifdef(CONFIG_ZMK_WPM app PRIVATE src/events/wpm_state_changed.c)
 target_sources_ifdef(CONFIG_USB_DEVICE_STACK app PRIVATE src/events/usb_conn_state_changed.c)
 target_sources(app PRIVATE src/behaviors/behavior_reset.c)
 target_sources_ifdef(CONFIG_ZMK_EXT_POWER app PRIVATE src/behaviors/behavior_ext_power.c)
 if ((NOT CONFIG_ZMK_SPLIT) OR CONFIG_ZMK_SPLIT_ROLE_CENTRAL)
   target_sources(app PRIVATE src/hid.c)
+  target_sources(app PRIVATE src/mouse.c)
   target_sources(app PRIVATE src/behaviors/behavior_key_press.c)
   target_sources_ifdef(CONFIG_ZMK_BEHAVIOR_KEY_TOGGLE app PRIVATE src/behaviors/behavior_key_toggle.c)
   target_sources(app PRIVATE src/behaviors/behavior_hold_tap.c)
@@ -62,8 +57,6 @@ if ((NOT CONFIG_ZMK_SPLIT) OR CONFIG_ZMK_SPLIT_ROLE_CENTRAL)
   target_sources_ifdef(CONFIG_ZMK_BEHAVIOR_SENSOR_ROTATE_VAR app PRIVATE src/behaviors/behavior_sensor_rotate_var.c)
   target_sources_ifdef(CONFIG_ZMK_BEHAVIOR_SENSOR_ROTATE_COMMON app PRIVATE src/behaviors/behavior_sensor_rotate_common.c)
   target_sources(app PRIVATE src/behaviors/behavior_mouse_key_press.c)
-  target_sources(app PRIVATE src/behaviors/behavior_mouse_move.c)
-  target_sources(app PRIVATE src/behaviors/behavior_mouse_scroll.c)
   target_sources(app PRIVATE src/combo.c)
   target_sources(app PRIVATE src/behaviors/behavior_tap_dance.c)
   target_sources(app PRIVATE src/behavior_queue.c)

app/Kconfig

@@ -314,7 +314,9 @@ endmenu
 
 menu "Mouse Options"
 
-rsource "src/mouse/Kconfig"
+config ZMK_MOUSE
+	bool "Enable ZMK mouse emulation"
+	default n
 
 #Mouse Options
 endmenu

app/dts/behaviors.dtsi

@@ -20,5 +20,3 @@
 #include <behaviors/backlight.dtsi>
 #include <behaviors/macros.dtsi>
 #include <behaviors/mouse_key_press.dtsi>
-#include <behaviors/mouse_move.dtsi>
-#include <behaviors/mouse_scroll.dtsi>

app/include/dt-bindings/zmk/mouse.h

@@ -27,29 +27,3 @@
 #define MB7 (0x40)
 
 #define MB8 (0x80)
-
-/* Mouse move behavior */
-#define MOVE_VERT(vert) ((vert)&0xFFFF)
-#define MOVE_VERT_DECODE(encoded) (int16_t)((encoded)&0x0000FFFF)
-#define MOVE_HOR(hor) (((hor)&0xFFFF) << 16)
-#define MOVE_HOR_DECODE(encoded) (int16_t)(((encoded)&0xFFFF0000) >> 16)
-
-#define MOVE(hor, vert) (MOVE_HOR(hor) + MOVE_VERT(vert))
-
-#define MOVE_UP MOVE_VERT(-600)
-#define MOVE_DOWN MOVE_VERT(600)
-#define MOVE_LEFT MOVE_HOR(-600)
-#define MOVE_RIGHT MOVE_HOR(600)
-
-/* Mouse scroll behavior */
-#define SCROLL_VERT(vert) ((vert)&0xFFFF)
-#define SCROLL_VERT_DECODE(encoded) (int16_t)((encoded)&0x0000FFFF)
-#define SCROLL_HOR(hor) (((hor)&0xFFFF) << 16)
-#define SCROLL_HOR_DECODE(encoded) (int16_t)(((encoded)&0xFFFF0000) >> 16)
-
-#define SCROLL(hor, vert) (SCROLL_HOR(hor) + SCROLL_VERT(vert))
-
-#define SCROLL_UP SCROLL_VERT(10)
-#define SCROLL_DOWN SCROLL_VERT(-10)
-#define SCROLL_LEFT SCROLL_HOR(-10)
-#define SCROLL_RIGHT SCROLL_HOR(10)

app/include/zmk/events/mouse_button_state_changed.h

@@ -23,5 +23,5 @@ ZMK_EVENT_DECLARE(zmk_mouse_button_state_changed);
 static inline struct zmk_mouse_button_state_changed_event *
 zmk_mouse_button_state_changed_from_encoded(uint32_t encoded, bool pressed, int64_t timestamp) {
     return new_zmk_mouse_button_state_changed((struct zmk_mouse_button_state_changed){
-        .buttons = HID_USAGE_ID(encoded), .state = pressed, .timestamp = timestamp});
+        .buttons = ZMK_HID_USAGE_ID(encoded), .state = pressed, .timestamp = timestamp});
 }