Add input "identifier" map_to_output "identifier"

include/sway/commands.h

@@ -192,6 +192,7 @@ sway_cmd input_cmd_drag_lock;
 sway_cmd input_cmd_dwt;
 sway_cmd input_cmd_events;
 sway_cmd input_cmd_left_handed;
+sway_cmd input_cmd_map_to_output;
 sway_cmd input_cmd_middle_emulation;
 sway_cmd input_cmd_natural_scroll;
 sway_cmd input_cmd_pointer_accel;

include/sway/config.h

@@ -52,7 +52,7 @@ struct sway_mode {
 };
 
 /**
- * libinput options for input devices
+ * options for input devices
  */
 struct input_config {
 	char *identifier;
@@ -75,6 +75,8 @@ struct input_config {
 	char *xkb_rules;
 	char *xkb_variant;
 
+	char *mapped_output;
+
 	bool capturable;
 	struct wlr_box region;
 };

sway/commands.c

@@ -187,6 +187,7 @@ static struct cmd_handler input_handlers[] = {
 	{ "dwt", input_cmd_dwt },
 	{ "events", input_cmd_events },
 	{ "left_handed", input_cmd_left_handed },
+	{ "map_to_output", input_cmd_map_to_output },
 	{ "middle_emulation", input_cmd_middle_emulation },
 	{ "natural_scroll", input_cmd_natural_scroll },
 	{ "pointer_accel", input_cmd_pointer_accel },

sway/commands/input/map_to_output.c

@@ -0,0 +1,27 @@
+#define _POSIX_C_SOURCE 200809L
+#include <string.h>
+#include <strings.h>
+#include "sway/config.h"
+#include "sway/commands.h"
+#include "sway/input/input-manager.h"
+#include "log.h"
+
+struct cmd_results *input_cmd_map_to_output(int argc, char **argv) {
+	struct cmd_results *error = NULL;
+	if ((error = checkarg(argc, "map_to_output", EXPECTED_EQUAL_TO, 1))) {
+		return error;
+	}
+	struct input_config *current_input_config =
+		config->handler_context.input_config;
+	if (!current_input_config) {
+		return cmd_results_new(CMD_FAILURE, "map_to_output",
+			"No input device defined.");
+	}
+	struct input_config *new_config =
+		new_input_config(current_input_config->identifier);
+
+	new_config->mapped_output = strdup(argv[0]);
+	apply_input_config(new_config);
+
+	return cmd_results_new(CMD_SUCCESS, NULL, NULL);
+}

sway/config/input.c

@@ -88,6 +88,10 @@ void merge_input_config(struct input_config *dst, struct input_config *src) {
 		free(dst->xkb_variant);
 		dst->xkb_variant = strdup(src->xkb_variant);
 	}
+	if (src->mapped_output) {
+		free(dst->mapped_output);
+		dst->mapped_output = strdup(src->mapped_output);
+	}
 }
 
 struct input_config *copy_input_config(struct input_config *ic) {

sway/input/seat.c

@@ -1,6 +1,7 @@
 #define _XOPEN_SOURCE 700
 #define _POSIX_C_SOURCE 199309L
 #include <assert.h>
+#include <strings.h>
 #include <time.h>
 #include <wlr/types/wlr_cursor.h>
 #include <wlr/types/wlr_output_layout.h>
@@ -219,10 +220,38 @@ struct sway_seat *seat_create(struct sway_input_manager *input,
 	return seat;
 }
 
+static void seat_apply_input_config(struct sway_seat *seat,
+		struct sway_seat_device *sway_device) {
+	struct input_config *ic = input_device_get_config(
+			sway_device->input_device);
+	if (!ic) {
+		return;
+	}
+	wlr_log(L_DEBUG, "Applying input config to %s",
+			sway_device->input_device->identifier);
+	if (ic->mapped_output) {
+		struct sway_container *output = NULL;
+		for (int i = 0; i < root_container.children->length; ++i) {
+			struct sway_container *_output = root_container.children->items[i];
+			if (strcasecmp(_output->name, ic->mapped_output) == 0) {
+				output = _output;
+				break;
+			}
+		}
+		if (output) {
+			wlr_cursor_map_input_to_output(seat->cursor->cursor,
+				sway_device->input_device->wlr_device,
+				output->sway_output->wlr_output);
+			wlr_log(L_DEBUG, "Mapped to output %s", output->name);
+		}
+	}
+}
+
 static void seat_configure_pointer(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_config(seat, sway_device);
 }
 
 static void seat_configure_keyboard(struct sway_seat *seat,
@@ -249,6 +278,7 @@ static void seat_configure_tablet_tool(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_config(seat, sway_device);
 }
 
 static struct sway_seat_device *seat_get_device(struct sway_seat *seat,

sway/meson.build

@@ -85,6 +85,7 @@ sway_sources = files(
 	'commands/input/dwt.c',
 	'commands/input/events.c',
 	'commands/input/left_handed.c',
+	'commands/input/map_to_output.c',
 	'commands/input/middle_emulation.c',
 	'commands/input/natural_scroll.c',
 	'commands/input/pointer_accel.c',

sway/sway-input.5.txt

@@ -40,6 +40,26 @@ For more information on these xkb configuration options, see
 **input** <identifier> xkb_variant <variant>::
 	Sets the variant of the keyboard like _dvorak_ or _colemak_.
 
+Mapping Configuration
+---------------------
+
+**input** <identifier> map_to_output <identifier>::
+	Maps inputs from this device to the specified output. Only meaningful if the
+	device is a pointer, touch, or drawing tablet device.
+
+**input** <identifier> map_to_region <WxH\@X,Y>::
+	Maps inputs from this device to the specified region of the global output
+	layout. Only meaningful if the device is a pointer, touch, or drawing tablet
+	device.
+
+**input** <identifier> map_region <WxH\@X,Y>::
+	Ignores inputs from this device that do not occur within the specified region.
+	Can be in millimeters (e.g. 10mmx20mm\@10mm,20mm) or in terms of 0..1 (e.g.
+	0.5x0.5\@0,0). Not all devices support millimeters. Only meaningful if the
+	device is not a keyboard an provides events in absolute terms (such as a
+	drawing tablet or touch screen - most pointers provide events relative to the
+	previous frame).
+
 Libinput Configuration
 ~~~~~~~~~~~~~~~~~~~~~~