Touchpad scroll on titlebar

common/util.c

@@ -142,3 +142,16 @@ bool sway_set_cloexec(int fd, bool cloexec) {
 	}
 	return true;
 }
+
+float _distance_scrolled = 0;
+void scroll_distance_add(float delta) {
+	_distance_scrolled += delta;
+}
+
+void scroll_distance_reset() {
+	_distance_scrolled = 0;
+}
+
+float scroll_distance_get() {
+	return _distance_scrolled;
+}

include/util.h

@@ -67,4 +67,8 @@ const char *sway_wl_output_subpixel_to_string(enum wl_output_subpixel subpixel);
 
 bool sway_set_cloexec(int fd, bool cloexec);
 
+void scroll_distance_add(float delta);
+void scroll_distance_reset();
+float scroll_distance_get();
+
 #endif

sway/input/seatop_default.c

@@ -12,6 +12,7 @@
 #include "sway/tree/view.h"
 #include "sway/tree/workspace.h"
 #include "log.h"
+#include "util.h"
 #if HAVE_XWAYLAND
 #include "sway/xwayland.h"
 #endif
@@ -709,8 +710,17 @@ static void handle_pointer_axis(struct sway_seat *seat,
 			struct sway_node *active =
 				seat_get_active_tiling_child(seat, tabcontainer);
 			list_t *siblings = container_get_siblings(cont);
+			int delta_discrete = event->delta_discrete;
+			if (delta_discrete == 0) {
+				scroll_distance_add(event->delta);
+				float dist = scroll_distance_get();
+				delta_discrete = round(dist / 10.);
+				if (abs(delta_discrete) > 0) {
+					scroll_distance_reset();
+				}
+			}
 			int desired = list_find(siblings, active->sway_container) +
-				round(scroll_factor * event->delta_discrete);
+				round(scroll_factor * delta_discrete);
 			if (desired < 0) {
 				desired = 0;
 			} else if (desired >= siblings->length) {