seat/pointer: add support for axis_relative_direction event

include/wlr/types/wlr_seat.h

@@ -101,7 +101,8 @@ struct wlr_pointer_grab_interface {
 			uint32_t button, enum wlr_button_state state);
 	void (*axis)(struct wlr_seat_pointer_grab *grab, uint32_t time_msec,
 			enum wlr_axis_orientation orientation, double value,
-			int32_t value_discrete, enum wlr_axis_source source);
+			int32_t value_discrete, enum wlr_axis_source source,
+			enum wlr_axis_relative_direction relative_direction);
 	void (*frame)(struct wlr_seat_pointer_grab *grab);
 	void (*cancel)(struct wlr_seat_pointer_grab *grab);
 };
@@ -407,7 +408,8 @@ uint32_t wlr_seat_pointer_send_button(struct wlr_seat *wlr_seat,
  */
 void wlr_seat_pointer_send_axis(struct wlr_seat *wlr_seat, uint32_t time_msec,
 		enum wlr_axis_orientation orientation, double value,
-		int32_t value_discrete, enum wlr_axis_source source);
+		int32_t value_discrete, enum wlr_axis_source source,
+		enum wlr_axis_relative_direction relative_direction);
 
 /**
  * Send a frame event to the surface with pointer focus. This function does not
@@ -458,7 +460,8 @@ uint32_t wlr_seat_pointer_notify_button(struct wlr_seat *wlr_seat,
  */
 void wlr_seat_pointer_notify_axis(struct wlr_seat *wlr_seat, uint32_t time_msec,
 		enum wlr_axis_orientation orientation, double value,
-		int32_t value_discrete, enum wlr_axis_source source);
+		int32_t value_discrete, enum wlr_axis_source source,
+		enum wlr_axis_relative_direction relative_direction);
 
 /**
  * Notify the seat of a frame event. Frame events are sent to end a group of

tinywl/tinywl.c

@@ -537,7 +537,7 @@ static void server_cursor_axis(struct wl_listener *listener, void *data) {
 	/* Notify the client with pointer focus of the axis event. */
 	wlr_seat_pointer_notify_axis(server->seat,
 			event->time_msec, event->orientation, event->delta,
-			event->delta_discrete, event->source);
+			event->delta_discrete, event->source, event->relative_direction);
 }
 
 static void server_cursor_frame(struct wl_listener *listener, void *data) {

types/data_device/wlr_drag.c

@@ -235,7 +235,8 @@ static uint32_t drag_handle_pointer_button(struct wlr_seat_pointer_grab *grab,
 
 static void drag_handle_pointer_axis(struct wlr_seat_pointer_grab *grab,
 		uint32_t time, enum wlr_axis_orientation orientation, double value,
-		int32_t value_discrete, enum wlr_axis_source source) {
+		int32_t value_discrete, enum wlr_axis_source source,
+		enum wlr_axis_relative_direction relative_direction) {
 	// This space is intentionally left blank
 }
 

types/seat/wlr_seat.c

@@ -12,7 +12,7 @@
 #include "types/wlr_seat.h"
 #include "util/global.h"
 
-#define SEAT_VERSION 8
+#define SEAT_VERSION 9
 
 static void seat_handle_get_pointer(struct wl_client *client,
 		struct wl_resource *seat_resource, uint32_t id) {

types/seat/wlr_seat_pointer.c

@@ -30,9 +30,10 @@ static uint32_t default_pointer_button(struct wlr_seat_pointer_grab *grab,
 
 static void default_pointer_axis(struct wlr_seat_pointer_grab *grab,
 		uint32_t time, enum wlr_axis_orientation orientation, double value,
-		int32_t value_discrete, enum wlr_axis_source source) {
+		int32_t value_discrete, enum wlr_axis_source source,
+		enum wlr_axis_relative_direction relative_direction) {
 	wlr_seat_pointer_send_axis(grab->seat, time, orientation, value,
-		value_discrete, source);
+		value_discrete, source, relative_direction);
 }
 
 static void default_pointer_frame(struct wlr_seat_pointer_grab *grab) {
@@ -321,7 +322,8 @@ static void update_value120_accumulators(struct wlr_seat_client *client,
 
 void wlr_seat_pointer_send_axis(struct wlr_seat *wlr_seat, uint32_t time,
 		enum wlr_axis_orientation orientation, double value,
-		int32_t value_discrete, enum wlr_axis_source source) {
+		int32_t value_discrete, enum wlr_axis_source source,
+		enum wlr_axis_relative_direction relative_direction) {
 	struct wlr_seat_client *client = wlr_seat->pointer_state.focused_client;
 	if (client == NULL) {
 		return;
@@ -361,6 +363,10 @@ void wlr_seat_pointer_send_axis(struct wlr_seat *wlr_seat, uint32_t time,
 			wl_pointer_send_axis_source(resource, source);
 		}
 		if (value) {
+			if (version >= WL_POINTER_AXIS_RELATIVE_DIRECTION_SINCE_VERSION) {
+				wl_pointer_send_axis_relative_direction(resource,
+					orientation, relative_direction);
+			}
 			if (value_discrete) {
 				if (version >= WL_POINTER_AXIS_VALUE120_SINCE_VERSION) {
 					// High resolution discrete scrolling
@@ -479,11 +485,12 @@ uint32_t wlr_seat_pointer_notify_button(struct wlr_seat *wlr_seat,
 
 void wlr_seat_pointer_notify_axis(struct wlr_seat *wlr_seat, uint32_t time,
 		enum wlr_axis_orientation orientation, double value,
-		int32_t value_discrete, enum wlr_axis_source source) {
+		int32_t value_discrete, enum wlr_axis_source source,
+		enum wlr_axis_relative_direction relative_direction) {
 	clock_gettime(CLOCK_MONOTONIC, &wlr_seat->last_event);
 	struct wlr_seat_pointer_grab *grab = wlr_seat->pointer_state.grab;
 	grab->interface->axis(grab, time, orientation, value, value_discrete,
-		source);
+		source, relative_direction);
 }
 
 void wlr_seat_pointer_notify_frame(struct wlr_seat *wlr_seat) {

types/xdg_shell/wlr_xdg_popup.c

@@ -82,9 +82,10 @@ static uint32_t xdg_pointer_grab_button(struct wlr_seat_pointer_grab *grab,
 
 static void xdg_pointer_grab_axis(struct wlr_seat_pointer_grab *grab,
 		uint32_t time, enum wlr_axis_orientation orientation, double value,
-		int32_t value_discrete, enum wlr_axis_source source) {
+		int32_t value_discrete, enum wlr_axis_source source,
+		enum wlr_axis_relative_direction relative_direction) {
 	wlr_seat_pointer_send_axis(grab->seat, time, orientation, value,
-		value_discrete, source);
+		value_discrete, source, relative_direction);
 }
 
 static void xdg_pointer_grab_frame(struct wlr_seat_pointer_grab *grab) {