Implement mouse warping

sway/commands.c

@@ -101,6 +101,7 @@ static struct cmd_handler handlers[] = {
 	{ "include", cmd_include },
 	{ "input", cmd_input },
 	{ "mode", cmd_mode },
+	{ "mouse_warping", cmd_mouse_warping },
 	{ "output", cmd_output },
 	{ "seat", cmd_seat },
 	{ "workspace", cmd_workspace },

sway/commands/mouse_warping.c

@@ -0,0 +1,19 @@
+#include <string.h>
+#include <strings.h>
+#include "sway/commands.h"
+
+struct cmd_results *cmd_mouse_warping(int argc, char **argv) {
+	struct cmd_results *error = NULL;
+	if ((error = checkarg(argc, "mouse_warping", EXPECTED_EQUAL_TO, 1))) {
+		return error;
+	} else if (strcasecmp(argv[0], "output") == 0) {
+		config->mouse_warping = true;
+	} else if (strcasecmp(argv[0], "none") == 0) {
+		config->mouse_warping = false;
+	} else {
+		return cmd_results_new(CMD_FAILURE, "mouse_warping",
+				"Expected 'mouse_warping output|none'");
+	}
+	return cmd_results_new(CMD_SUCCESS, NULL, NULL);
+}
+

sway/input/cursor.c

@@ -156,8 +156,8 @@ static void handle_cursor_motion(struct wl_listener *listener, void *data) {
 	cursor_send_pointer_motion(cursor, event->time_msec);
 }
 
-static void handle_cursor_motion_absolute(struct wl_listener *listener,
+static void handle_cursor_motion_absolute(
-		void *data) {
+		struct wl_listener *listener, void *data) {
 	struct sway_cursor *cursor =
 		wl_container_of(listener, cursor, motion_absolute);
 	struct wlr_event_pointer_motion_absolute *event = data;

sway/input/seat.c

@@ -333,15 +333,29 @@ void sway_seat_set_focus(struct sway_seat *seat,
 	if (last_focus) {
 		struct sway_container *last_ws = last_focus;
 		if (last_ws && last_ws->type != C_WORKSPACE) {
-			last_ws = container_parent(last_focus, C_WORKSPACE);
+			last_ws = container_parent(last_ws, C_WORKSPACE);
 		}
 		if (last_ws) {
-			wlr_log(L_DEBUG, "sending workspace event");
 			ipc_event_workspace(last_ws, container, "focus");
 			if (last_ws->children->length == 0) {
 				container_workspace_destroy(last_ws);
 			}
 		}
+		struct sway_container *last_output = last_focus;
+		if (last_output && last_output->type != C_OUTPUT) {
+			last_output = container_parent(last_output, C_OUTPUT);
+		}
+		struct sway_container *new_output = container;
+		if (new_output && new_output->type != C_OUTPUT) {
+			new_output = container_parent(new_output, C_OUTPUT);
+		}
+		if (new_output != last_output && config->mouse_warping) {
+			struct wlr_output *output = new_output->sway_output->wlr_output;
+			// TODO: Change container coords to layout coords
+			double x = container->x + output->lx + container->width / 2.0;
+			double y = container->y + output->ly + container->height / 2.0;
+			wlr_cursor_warp(seat->cursor->cursor, NULL, x, y);
+		}
 	}
 
 	if (last_focus && last_focus->type == C_VIEW &&

sway/meson.build

@@ -63,6 +63,7 @@ sway_sources = files(
 	'commands/input/xkb_options.c',
 	'commands/input/xkb_rules.c',
 	'commands/input/xkb_variant.c',
+	'commands/mouse_warping.c',
 	'commands/output.c',
 	'commands/reload.c',
 	'commands/workspace.c',