Implement seatop_touch

Atm we got issue with the touch position sent to the clients. While
holding contact, leaving the initial container will continue to send
motion event to the client but with the new local position from the new
container.

This seatop goal is to send the position of the touch event, relatively
to the initial container layout position.

Author: Stacy Harper

include/sway/input/cursor.h

@@ -108,6 +108,10 @@ void cursor_unhide(struct sway_cursor *cursor);
 int cursor_get_timeout(struct sway_cursor *cursor);
 void cursor_notify_key_press(struct sway_cursor *cursor);
 
+void pointer_motion(struct sway_cursor *cursor, uint32_t time_msec,
+		struct wlr_input_device *device, double dx, double dy,
+		double dx_unaccel, double dy_unaccel);
+
 void dispatch_cursor_button(struct sway_cursor *cursor,
 	struct wlr_input_device *device, uint32_t time_msec, uint32_t button,
 	enum wlr_button_state state);

include/sway/input/seat.h

@@ -4,6 +4,7 @@
 #include <wlr/types/wlr_keyboard_shortcuts_inhibit_v1.h>
 #include <wlr/types/wlr_layer_shell_v1.h>
 #include <wlr/types/wlr_seat.h>
+#include <wlr/types/wlr_touch.h>
 #include <wlr/util/edges.h>
 #include "sway/config.h"
 #include "sway/input/input-manager.h"
@@ -36,6 +37,12 @@ struct sway_seatop_impl {
 	void (*swipe_end)(struct sway_seat *seat,
 			struct wlr_pointer_swipe_end_event *event);
 	void (*rebase)(struct sway_seat *seat, uint32_t time_msec);
+	void (*touch_motion)(struct sway_seat *seat,
+			struct wlr_touch_motion_event *event, double lx, double ly);
+	void (*touch_up)(struct sway_seat *seat,
+			struct wlr_touch_up_event *event);
+	void (*touch_down)(struct sway_seat *seat,
+			struct wlr_touch_down_event *event, double lx, double ly);
 	void (*tablet_tool_motion)(struct sway_seat *seat,
 			struct sway_tablet_tool *tool, uint32_t time_msec);
 	void (*tablet_tool_tip)(struct sway_seat *seat, struct sway_tablet_tool *tool,
@@ -256,10 +263,13 @@ enum wlr_edges find_resize_edge(struct sway_container *cont,
 void seatop_begin_default(struct sway_seat *seat);
 
 void seatop_begin_down(struct sway_seat *seat, struct sway_container *con,
-		uint32_t time_msec, double sx, double sy);
+		double sx, double sy);
 
 void seatop_begin_down_on_surface(struct sway_seat *seat,
-		struct wlr_surface *surface, uint32_t time_msec, double sx, double sy);
+		struct wlr_surface *surface, double sx, double sy);
+
+void seatop_begin_touch_down(struct sway_seat *seat, struct wlr_surface *surface,
+		struct wlr_touch_down_event *event, double sx, double sy, double lx, double ly);
 
 void seatop_begin_move_floating(struct sway_seat *seat,
 		struct sway_container *con);
@@ -319,6 +329,15 @@ void seatop_swipe_update(struct sway_seat *seat,
 void seatop_swipe_end(struct sway_seat *seat,
 		struct wlr_pointer_swipe_end_event *event);
 
+void seatop_touch_motion(struct sway_seat *seat,
+		struct wlr_touch_motion_event *event, double lx, double ly);
+
+void seatop_touch_up(struct sway_seat *seat,
+		struct wlr_touch_up_event *event);
+
+void seatop_touch_down(struct sway_seat *seat,
+		struct wlr_touch_down_event *event, double lx, double ly);
+
 void seatop_rebase(struct sway_seat *seat, uint32_t time_msec);
 
 /**

sway/input/cursor.c

@@ -364,7 +364,7 @@ void cursor_unhide(struct sway_cursor *cursor) {
 	wl_event_source_timer_update(cursor->hide_source, cursor_get_timeout(cursor));
 }
 
-static void pointer_motion(struct sway_cursor *cursor, uint32_t time_msec,
+void pointer_motion(struct sway_cursor *cursor, uint32_t time_msec,
 		struct wlr_input_device *device, double dx, double dy,
 		double dx_unaccel, double dy_unaccel) {
 	wlr_relative_pointer_manager_v1_send_relative_motion(
@@ -479,51 +479,24 @@ static void handle_touch_down(struct wl_listener *listener, void *data) {
 	cursor_hide(cursor);
 
 	struct sway_seat *seat = cursor->seat;
-	struct wlr_seat *wlr_seat = seat->wlr_seat;
-	struct wlr_surface *surface = NULL;
 
 	double lx, ly;
 	wlr_cursor_absolute_to_layout_coords(cursor->cursor, &event->touch->base,
 			event->x, event->y, &lx, &ly);
-	double sx, sy;
-	struct sway_node *focused_node = node_at_coords(seat, lx, ly, &surface, &sx, &sy);
 
 	seat->touch_id = event->touch_id;
 	seat->touch_x = lx;
 	seat->touch_y = ly;
 
-	if (surface && wlr_surface_accepts_touch(wlr_seat, surface)) {
-		if (seat_is_input_allowed(seat, surface)) {
-			wlr_seat_touch_notify_down(wlr_seat, surface, event->time_msec,
-					event->touch_id, sx, sy);
-
-			if (focused_node) {
-			    seat_set_focus(seat, focused_node);
-			}
-		}
-	} else if (!cursor->simulating_pointer_from_touch &&
-			(!surface || seat_is_input_allowed(seat, surface))) {
-		// Fallback to cursor simulation.
-		// The pointer_touch_id state is needed, so drags are not aborted when over
-		// a surface supporting touch and multi touch events don't interfere.
-		cursor->simulating_pointer_from_touch = true;
-		cursor->pointer_touch_id = seat->touch_id;
-		double dx, dy;
-		dx = lx - cursor->cursor->x;
-		dy = ly - cursor->cursor->y;
-		pointer_motion(cursor, event->time_msec, &event->touch->base, dx, dy,
-			dx, dy);
-		dispatch_cursor_button(cursor, &event->touch->base, event->time_msec,
-				BTN_LEFT, WLR_BUTTON_PRESSED);
-	}
+	seatop_touch_down(seat, event, lx, ly);
 }
 
 static void handle_touch_up(struct wl_listener *listener, void *data) {
 	struct sway_cursor *cursor = wl_container_of(listener, cursor, touch_up);
 	struct wlr_touch_up_event *event = data;
 	cursor_handle_activity_from_device(cursor, &event->touch->base);
 
-	struct wlr_seat *wlr_seat = cursor->seat->wlr_seat;
+	struct sway_seat *seat = cursor->seat;
 
 	if (cursor->simulating_pointer_from_touch) {
 		if (cursor->pointer_touch_id == cursor->seat->touch_id) {
@@ -532,7 +505,7 @@ static void handle_touch_up(struct wl_listener *listener, void *data) {
 				event->time_msec, BTN_LEFT, WLR_BUTTON_RELEASED);
 		}
 	} else {
-		wlr_seat_touch_notify_up(wlr_seat, event->time_msec, event->touch_id);
+		seatop_touch_up(seat, event);
 	}
 }
 
@@ -543,19 +516,14 @@ static void handle_touch_motion(struct wl_listener *listener, void *data) {
 	cursor_handle_activity_from_device(cursor, &event->touch->base);
 
 	struct sway_seat *seat = cursor->seat;
-	struct wlr_seat *wlr_seat = seat->wlr_seat;
-	struct wlr_surface *surface = NULL;
 
 	double lx, ly;
 	wlr_cursor_absolute_to_layout_coords(cursor->cursor, &event->touch->base,
 			event->x, event->y, &lx, &ly);
-	double sx, sy;
-	node_at_coords(cursor->seat, lx, ly, &surface, &sx, &sy);
 
 	if (seat->touch_id == event->touch_id) {
 		seat->touch_x = lx;
 		seat->touch_y = ly;
-
 		struct sway_drag_icon *drag_icon;
 		wl_list_for_each(drag_icon, &root->drag_icons, link) {
 			if (drag_icon->seat == seat) {
@@ -572,9 +540,8 @@ static void handle_touch_motion(struct wl_listener *listener, void *data) {
 			pointer_motion(cursor, event->time_msec, &event->touch->base,
 				dx, dy, dx, dy);
 		}
-	} else if (surface) {
-		wlr_seat_touch_notify_motion(wlr_seat, event->time_msec,
-			event->touch_id, sx, sy);
+	} else {
+		seatop_touch_motion(seat, event, lx, ly);
 	}
 }
 

sway/input/seat.c

@@ -1618,6 +1618,26 @@ void seatop_pointer_axis(struct sway_seat *seat,
 	}
 }
 
+void seatop_touch_motion(struct sway_seat *seat, struct wlr_touch_motion_event *event,
+		double lx, double ly) {
+	if (seat->seatop_impl->touch_motion) {
+		seat->seatop_impl->touch_motion(seat, event, lx, ly);
+	}
+}
+
+void seatop_touch_up(struct sway_seat *seat, struct wlr_touch_up_event *event) {
+	if (seat->seatop_impl->touch_up) {
+		seat->seatop_impl->touch_up(seat, event);
+	}
+}
+
+void seatop_touch_down(struct sway_seat *seat, struct wlr_touch_down_event *event,
+		double lx, double ly) {
+	if (seat->seatop_impl->touch_down) {
+		seat->seatop_impl->touch_down(seat, event, lx, ly);
+	}
+}
+
 void seatop_tablet_tool_tip(struct sway_seat *seat,
 		struct sway_tablet_tool *tool, uint32_t time_msec,
 		enum wlr_tablet_tool_tip_state state) {

sway/input/seatop_default.c

@@ -261,7 +261,7 @@ static void handle_tablet_tool_tip(struct sway_seat *seat,
 
 		// Handle tapping on a container surface
 		seat_set_focus_container(seat, cont);
-		seatop_begin_down(seat, node->sway_container, time_msec, sx, sy);
+		seatop_begin_down(seat, node->sway_container, sx, sy);
 	}
 #if HAVE_XWAYLAND
 	// Handle tapping on an xwayland unmanaged view
@@ -374,7 +374,7 @@ static void handle_button(struct sway_seat *seat, uint32_t time_msec,
 			transaction_commit_dirty();
 		}
 		if (state == WLR_BUTTON_PRESSED) {
-			seatop_begin_down_on_surface(seat, surface, time_msec, sx, sy);
+			seatop_begin_down_on_surface(seat, surface, sx, sy);
 		}
 		seat_pointer_notify_button(seat, time_msec, button, state);
 		return;
@@ -499,7 +499,7 @@ static void handle_button(struct sway_seat *seat, uint32_t time_msec,
 
 	// Handle mousedown on a container surface
 	if (surface && cont && state == WLR_BUTTON_PRESSED) {
-		seatop_begin_down(seat, cont, time_msec, sx, sy);
+		seatop_begin_down(seat, cont, sx, sy);
 		seat_pointer_notify_button(seat, time_msec, button, WLR_BUTTON_PRESSED);
 		return;
 	}
@@ -649,6 +649,36 @@ static void handle_tablet_tool_motion(struct sway_seat *seat,
 	e->previous_node = node;
 }
 
+static void handle_touch_down(struct sway_seat *seat,
+		struct wlr_touch_down_event *event, double lx, double ly) {
+	struct wlr_surface *surface = NULL;
+	struct wlr_seat *wlr_seat = seat->wlr_seat;
+	struct sway_cursor *cursor = seat->cursor;
+	double sx, sy;
+	node_at_coords(seat, seat->touch_x, seat->touch_y, &surface, &sx, &sy);
+
+	if (surface && wlr_surface_accepts_touch(wlr_seat, surface)) {
+		if (seat_is_input_allowed(seat, surface)) {
+			cursor->simulating_pointer_from_touch = false;
+			seatop_begin_touch_down(seat, surface, event, sx, sy, lx, ly);
+		}
+	} else if (!cursor->simulating_pointer_from_touch &&
+			(!surface || seat_is_input_allowed(seat, surface))) {
+		// Fallback to cursor simulation.
+		// The pointer_touch_id state is needed, so drags are not aborted when over
+		// a surface supporting touch and multi touch events don't interfere.
+		cursor->simulating_pointer_from_touch = true;
+		cursor->pointer_touch_id = seat->touch_id;
+		double dx, dy;
+		dx = seat->touch_x - cursor->cursor->x;
+		dy = seat->touch_y - cursor->cursor->y;
+		pointer_motion(cursor, event->time_msec, &event->touch->base, dx, dy,
+				dx, dy);
+		dispatch_cursor_button(cursor, &event->touch->base, event->time_msec,
+				BTN_LEFT, WLR_BUTTON_PRESSED);
+	}
+}
+
 /*----------------------------------------\
  * Functions used by handle_pointer_axis  /
  *--------------------------------------*/
@@ -1096,6 +1126,7 @@ static const struct sway_seatop_impl seatop_impl = {
 	.swipe_begin = handle_swipe_begin,
 	.swipe_update = handle_swipe_update,
 	.swipe_end = handle_swipe_end,
+	.touch_down = handle_touch_down,
 	.rebase = handle_rebase,
 	.allow_set_cursor = true,
 };