Only reconfigure input mappings on output change

Fully reconfiguring all input devices on output change takes a
loooong time. Let's just reconfigure what we need: only mappings
depend on outputs.

include/sway/input/input-manager.h

@@ -47,6 +47,8 @@ void input_manager_apply_input_config(struct input_config *input_config);
 
 void input_manager_configure_all_inputs(void);
 
+void input_manager_configure_all_input_mappings(void);
+
 void input_manager_reset_input(struct sway_input_device *input_device);
 
 void input_manager_reset_all_inputs(void);

include/sway/input/seat.h

@@ -168,6 +168,9 @@ void seat_add_device(struct sway_seat *seat,
 void seat_configure_device(struct sway_seat *seat,
 		struct sway_input_device *device);
 
+void seat_configure_device_mapping(struct sway_seat *seat,
+		struct sway_input_device *input_device);
+
 void seat_reset_device(struct sway_seat *seat,
 		struct sway_input_device *input_device);
 

sway/config/output.c

@@ -590,7 +590,7 @@ bool apply_output_config(struct output_config *oc, struct sway_output *output) {
 	// Reconfigure all devices, since input config may have been applied before
 	// this output came online, and some config items (like map_to_output) are
 	// dependent on an output being present.
-	input_manager_configure_all_inputs();
+	input_manager_configure_all_input_mappings();
 	// Reconfigure the cursor images, since the scale may have changed.
 	input_manager_configure_xcursor();
 	return true;

sway/input/input-manager.c

@@ -571,6 +571,16 @@ void input_manager_configure_all_inputs(void) {
 	}
 }
 
+void input_manager_configure_all_input_mappings(void) {
+	struct sway_input_device *input_device;
+	wl_list_for_each(input_device, &server.input->devices, link) {
+		struct sway_seat *seat;
+		wl_list_for_each(seat, &server.input->seats, link) {
+			seat_configure_device_mapping(seat, input_device);
+		}
+	}
+}
+
 void input_manager_apply_input_config(struct input_config *input_config) {
 	struct sway_input_device *input_device = NULL;
 	bool wildcard = strcmp(input_config->identifier, "*") == 0;

sway/input/seat.c

@@ -710,6 +710,15 @@ static void seat_apply_input_mapping(struct sway_seat *seat,
 	struct input_config *ic =
 		input_device_get_config(sway_device->input_device);
 
+	switch (sway_device->input_device->wlr_device->type) {
+	case WLR_INPUT_DEVICE_POINTER:
+	case WLR_INPUT_DEVICE_TOUCH:
+	case WLR_INPUT_DEVICE_TABLET_TOOL:
+		break;
+	default:
+		return; // these devices don't support mappings
+	}
+
 	sway_log(SWAY_DEBUG, "Applying input mapping to %s",
 		sway_device->input_device->identifier);
 
@@ -799,7 +808,6 @@ static void seat_configure_pointer(struct sway_seat *seat,
 	}
 	wlr_cursor_attach_input_device(seat->cursor->cursor,
 		sway_device->input_device->wlr_device);
-	seat_apply_input_mapping(seat, sway_device);
 	wl_event_source_timer_update(
 			seat->cursor->hide_source, cursor_get_timeout(seat->cursor));
 }
@@ -841,7 +849,6 @@ static void seat_configure_touch(struct sway_seat *seat,
 		struct sway_seat_device *sway_device) {
 	wlr_cursor_attach_input_device(seat->cursor->cursor,
 		sway_device->input_device->wlr_device);
-	seat_apply_input_mapping(seat, sway_device);
 }
 
 static void seat_configure_tablet_tool(struct sway_seat *seat,
@@ -852,7 +859,6 @@ static void seat_configure_tablet_tool(struct sway_seat *seat,
 	sway_configure_tablet(sway_device->tablet);
 	wlr_cursor_attach_input_device(seat->cursor->cursor,
 		sway_device->input_device->wlr_device);
-	seat_apply_input_mapping(seat, sway_device);
 }
 
 static void seat_configure_tablet_pad(struct sway_seat *seat,
@@ -909,6 +915,18 @@ void seat_configure_device(struct sway_seat *seat,
 			seat_configure_tablet_pad(seat, seat_device);
 			break;
 	}
+
+	seat_apply_input_mapping(seat, seat_device);
+}
+
+void seat_configure_device_mapping(struct sway_seat *seat,
+		struct sway_input_device *input_device) {
+	struct sway_seat_device *seat_device = seat_get_device(seat, input_device);
+	if (!seat_device) {
+		return;
+	}
+
+	seat_apply_input_mapping(seat, seat_device);
 }
 
 void seat_reset_device(struct sway_seat *seat,

sway/tree/output.c

@@ -277,7 +277,7 @@ void output_disable(struct sway_output *output) {
 	// Reconfigure all devices, since devices with map_to_output directives for
 	// an output that goes offline should stop sending events as long as the
 	// output remains offline.
-	input_manager_configure_all_inputs();
+	input_manager_configure_all_input_mappings();
 }
 
 void output_begin_destroy(struct sway_output *output) {