Introduce cursor_rebase

This function "rebases" the cursor on top of whatever is underneath it,
without triggering any focus changes.

include/sway/input/cursor.h

@@ -40,8 +40,20 @@ struct sway_cursor {
 
 void sway_cursor_destroy(struct sway_cursor *cursor);
 struct sway_cursor *sway_cursor_create(struct sway_seat *seat);
-void cursor_send_pointer_motion(struct sway_cursor *cursor, uint32_t time_msec,
+
-	bool allow_refocusing);
+/**
+ * "Rebase" a cursor on top of whatever view is underneath it.
+ *
+ * This chooses a cursor icon and sends a motion event to the surface.
+ */
+void cursor_rebase(struct sway_cursor *cursor);
+
+/**
+ * Like cursor_rebase, but also allows focus to change when the cursor enters a
+ * new container.
+ */
+void cursor_send_pointer_motion(struct sway_cursor *cursor, uint32_t time_msec);
+
 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);

sway/commands/border.c

@@ -96,7 +96,7 @@ struct cmd_results *cmd_border(int argc, char **argv) {
 
 	struct sway_seat *seat = input_manager_current_seat(input_manager);
 	if (seat->cursor) {
-		cursor_send_pointer_motion(seat->cursor, 0, false);
+		cursor_rebase(seat->cursor);
 	}
 
 	return cmd_results_new(CMD_SUCCESS, NULL, NULL);

sway/commands/focus.c

@@ -236,7 +236,7 @@ struct cmd_results *cmd_focus(int argc, char **argv) {
 	if (argc == 0 && container) {
 		seat_set_focus_container(seat, container);
 		seat_consider_warp_to_focus(seat);
-		cursor_send_pointer_motion(seat->cursor, 0, true);
+		cursor_rebase(seat->cursor);
 		return cmd_results_new(CMD_SUCCESS, NULL, NULL);
 	}
 

sway/commands/seat/cursor.c

@@ -36,7 +36,7 @@ struct cmd_results *seat_cmd_cursor(int argc, char **argv) {
 		int delta_x = strtol(argv[1], NULL, 10);
 		int delta_y = strtol(argv[2], NULL, 10);
 		wlr_cursor_move(cursor->cursor, NULL, delta_x, delta_y);
-		cursor_send_pointer_motion(cursor, 0, true);
+		cursor_rebase(cursor);
 	} else if (strcasecmp(argv[0], "set") == 0) {
 		if (argc < 3) {
 			return cmd_results_new(CMD_INVALID, "cursor", expected_syntax);
@@ -45,7 +45,7 @@ struct cmd_results *seat_cmd_cursor(int argc, char **argv) {
 		float x = strtof(argv[1], NULL) / root->width;
 		float y = strtof(argv[2], NULL) / root->height;
 		wlr_cursor_warp_absolute(cursor->cursor, NULL, x, y);
-		cursor_send_pointer_motion(cursor, 0, true);
+		cursor_rebase(cursor);
 	} else {
 		if (argc < 2) {
 			return cmd_results_new(CMD_INVALID, "cursor", expected_syntax);

sway/input/cursor.c

@@ -543,8 +543,57 @@ static void handle_resize_tiling_motion(struct sway_seat *seat,
 	}
 }
 
-void cursor_send_pointer_motion(struct sway_cursor *cursor, uint32_t time_msec,
+static void cursor_do_rebase(struct sway_cursor *cursor, uint32_t time_msec,
-		bool allow_refocusing) {
+		struct sway_node *node, struct wlr_surface *surface,
+		double sx, double sy) {
+	// Handle cursor image
+	if (surface) {
+		// Reset cursor if switching between clients
+		struct wl_client *client = wl_resource_get_client(surface->resource);
+		if (client != cursor->image_client) {
+			cursor_set_image(cursor, "left_ptr", client);
+		}
+	} else if (node && node->type == N_CONTAINER) {
+		// Try a node's resize edge
+		enum wlr_edges edge = find_resize_edge(node->sway_container, cursor);
+		if (edge == WLR_EDGE_NONE) {
+			cursor_set_image(cursor, "left_ptr", NULL);
+		} else if (container_is_floating(node->sway_container)) {
+			cursor_set_image(cursor, wlr_xcursor_get_resize_name(edge), NULL);
+		} else {
+			if (edge & (WLR_EDGE_LEFT | WLR_EDGE_RIGHT)) {
+				cursor_set_image(cursor, "col-resize", NULL);
+			} else {
+				cursor_set_image(cursor, "row-resize", NULL);
+			}
+		}
+	} else {
+		cursor_set_image(cursor, "left_ptr", NULL);
+	}
+
+	// Send pointer enter/leave
+	struct wlr_seat *wlr_seat = cursor->seat->wlr_seat;
+	if (surface) {
+		if (seat_is_input_allowed(cursor->seat, surface)) {
+			wlr_seat_pointer_notify_enter(wlr_seat, surface, sx, sy);
+			wlr_seat_pointer_notify_motion(wlr_seat, time_msec, sx, sy);
+		}
+	} else {
+		wlr_seat_pointer_clear_focus(wlr_seat);
+	}
+}
+
+void cursor_rebase(struct sway_cursor *cursor) {
+	uint32_t time_msec = get_current_time_msec();
+	struct wlr_surface *surface;
+	double sx, sy;
+	cursor->previous.node = node_at_coords(cursor->seat,
+			cursor->cursor->x, cursor->cursor->y, &surface, &sx, &sy);
+	cursor_do_rebase(cursor, time_msec, cursor->previous.node, surface, sx, sy);
+}
+
+void cursor_send_pointer_motion(struct sway_cursor *cursor,
+		uint32_t time_msec) {
 	if (time_msec == 0) {
 		time_msec = get_current_time_msec();
 	}
@@ -589,7 +638,7 @@ void cursor_send_pointer_motion(struct sway_cursor *cursor, uint32_t time_msec,
 	cursor->previous.y = cursor->cursor->y;
 	cursor->previous.node = node;
 
-	if (node && config->focus_follows_mouse && allow_refocusing) {
+	if (node && config->focus_follows_mouse) {
 		struct sway_node *focus = seat_get_focus(seat);
 		if (focus && node->type == N_WORKSPACE) {
 			// Only follow the mouse if it would move to a new output
@@ -620,40 +669,7 @@ void cursor_send_pointer_motion(struct sway_cursor *cursor, uint32_t time_msec,
 		}
 	}
 
-	// Handle cursor image
+	cursor_do_rebase(cursor, time_msec, node, surface, sx, sy);
-	if (surface) {
-		// Reset cursor if switching between clients
-		struct wl_client *client = wl_resource_get_client(surface->resource);
-		if (client != cursor->image_client) {
-			cursor_set_image(cursor, "left_ptr", client);
-		}
-	} else if (node && node->type == N_CONTAINER) {
-		// Try a node's resize edge
-		enum wlr_edges edge = find_resize_edge(node->sway_container, cursor);
-		if (edge == WLR_EDGE_NONE) {
-			cursor_set_image(cursor, "left_ptr", NULL);
-		} else if (container_is_floating(node->sway_container)) {
-			cursor_set_image(cursor, wlr_xcursor_get_resize_name(edge), NULL);
-		} else {
-			if (edge & (WLR_EDGE_LEFT | WLR_EDGE_RIGHT)) {
-				cursor_set_image(cursor, "col-resize", NULL);
-			} else {
-				cursor_set_image(cursor, "row-resize", NULL);
-			}
-		}
-	} else {
-		cursor_set_image(cursor, "left_ptr", NULL);
-	}
-
-	// send pointer enter/leave
-	if (surface != NULL) {
-		if (seat_is_input_allowed(seat, surface)) {
-			wlr_seat_pointer_notify_enter(wlr_seat, surface, sx, sy);
-			wlr_seat_pointer_notify_motion(wlr_seat, time_msec, sx, sy);
-		}
-	} else {
-		wlr_seat_pointer_clear_focus(wlr_seat);
-	}
 
 	struct wlr_drag_icon *wlr_drag_icon;
 	wl_list_for_each(wlr_drag_icon, &wlr_seat->drag_icons, link) {
@@ -668,7 +684,7 @@ static void handle_cursor_motion(struct wl_listener *listener, void *data) {
 	struct wlr_event_pointer_motion *event = data;
 	wlr_cursor_move(cursor->cursor, event->device,
 		event->delta_x, event->delta_y);
-	cursor_send_pointer_motion(cursor, event->time_msec, true);
+	cursor_send_pointer_motion(cursor, event->time_msec);
 	transaction_commit_dirty();
 }
 
@@ -679,7 +695,7 @@ static void handle_cursor_motion_absolute(
 	wlr_idle_notify_activity(cursor->seat->input->server->idle, cursor->seat->wlr_seat);
 	struct wlr_event_pointer_motion_absolute *event = data;
 	wlr_cursor_warp_absolute(cursor->cursor, event->device, event->x, event->y);
-	cursor_send_pointer_motion(cursor, event->time_msec, true);
+	cursor_send_pointer_motion(cursor, event->time_msec);
 	transaction_commit_dirty();
 }
 
@@ -1134,7 +1150,7 @@ static void handle_tool_axis(struct wl_listener *listener, void *data) {
 	}
 
 	wlr_cursor_warp_absolute(cursor->cursor, event->device, x, y);
-	cursor_send_pointer_motion(cursor, event->time_msec, true);
+	cursor_send_pointer_motion(cursor, event->time_msec);
 	transaction_commit_dirty();
 }
 

sway/input/seat.c

@@ -1173,7 +1173,7 @@ void seat_end_mouse_operation(struct sway_seat *seat) {
 		seat->cursor->previous.x = seat->op_ref_lx;
 		seat->cursor->previous.y = seat->op_ref_ly;
 		if (seat->op_moved) {
-			cursor_send_pointer_motion(seat->cursor, 0, true);
+			cursor_send_pointer_motion(seat->cursor, 0);
 		}
 	} else {
 		cursor_set_image(seat->cursor, "left_ptr", NULL);
@@ -1207,5 +1207,5 @@ void seat_consider_warp_to_focus(struct sway_seat *seat) {
 	} else {
 		cursor_warp_to_workspace(seat->cursor, focus->sway_workspace);
 	}
-	cursor_send_pointer_motion(seat->cursor, 0, false);
+	cursor_rebase(seat->cursor);
 }

sway/tree/view.c

@@ -653,9 +653,8 @@ void view_unmap(struct sway_view *view) {
 			} else if (node && node->type == N_WORKSPACE) {
 				cursor_warp_to_workspace(seat->cursor, node->sway_workspace);
 			}
-		} else {
-			cursor_send_pointer_motion(seat->cursor, 0, true);
 		}
+		cursor_rebase(seat->cursor);
 	}
 
 	transaction_commit_dirty();

sway/tree/workspace.c

@@ -399,7 +399,7 @@ bool workspace_switch(struct sway_workspace *workspace,
 	}
 	seat_set_focus(seat, next);
 	arrange_workspace(workspace);
-	cursor_send_pointer_motion(seat->cursor, 0, true);
+	cursor_rebase(seat->cursor);
 	return true;
 }