seat_cmd_cursor: utilize mouse button helpers

This modifies `seat_cmd_cursor` to utilize `get_mouse_button` when
parsing mouse buttons for the `press` and `release` operations. All x11
buttons, button event names, and button event codes are supported.
For x11 axis buttons, `dispatch_cursor_axis` is used instead of
`dispatch_cursor_button`. However the `press`/`release` state is ignored
and the either axis event is processed. This also removes support for
`left` and `right` in favor of `BTN_LEFT` and `BTN_RIGHT`.

include/sway/input/cursor.h

@@ -74,6 +74,9 @@ 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);
 
+void dispatch_cursor_axis(struct sway_cursor *cursor,
+		struct wlr_event_pointer_axis *event);
+
 void cursor_set_image(struct sway_cursor *cursor, const char *image,
 	struct wl_client *client);
 

sway/commands/seat/cursor.c

@@ -3,6 +3,7 @@
 
 #include <strings.h>
 #include <wlr/types/wlr_cursor.h>
+#include <wlr/types/wlr_pointer.h>
 #include "sway/commands.h"
 #include "sway/input/cursor.h"
 
@@ -11,7 +12,7 @@ static struct cmd_results *press_or_release(struct sway_cursor *cursor,
 
 static const char *expected_syntax = "Expected 'cursor <move> <x> <y>' or "
 					"'cursor <set> <x> <y>' or "
-					"'curor <press|release> <left|right|1|2|3...>'";
+					"'curor <press|release> <button[1-9]|event-name-or-code>'";
 
 static struct cmd_results *handle_command(struct sway_cursor *cursor,
 		int argc, char **argv) {
@@ -91,15 +92,35 @@ static struct cmd_results *press_or_release(struct sway_cursor *cursor,
 		return cmd_results_new(CMD_INVALID, "cursor", expected_syntax);
 	}
 
-	if (strcasecmp(button_str, "left") == 0) {
-		button = BTN_LEFT;
-	} else if (strcasecmp(button_str, "right") == 0) {
-		button = BTN_RIGHT;
-	} else {
-		button = strtol(button_str, NULL, 10);
-		if (button == 0) {
-			return cmd_results_new(CMD_INVALID, "cursor", expected_syntax);
-		}
+	char *message = NULL;
+	button = get_mouse_button(button_str, &message);
+	if (message) {
+		struct cmd_results *error =
+			cmd_results_new(CMD_INVALID, "cursor", message);
+		free(message);
+		return error;
+	} else if (button == SWAY_SCROLL_UP || button == SWAY_SCROLL_DOWN
+			|| button == SWAY_SCROLL_LEFT || button == SWAY_SCROLL_RIGHT) {
+		// Dispatch axis event
+		enum wlr_axis_orientation orientation =
+			(button == SWAY_SCROLL_UP || button == SWAY_SCROLL_DOWN)
+			? WLR_AXIS_ORIENTATION_VERTICAL
+			: WLR_AXIS_ORIENTATION_HORIZONTAL;
+		double delta = (button == SWAY_SCROLL_UP || button == SWAY_SCROLL_LEFT)
+			? -1 : 1;
+		struct wlr_event_pointer_axis event = {
+			.device = NULL,
+			.time_msec = 0,
+			.source = WLR_AXIS_SOURCE_WHEEL,
+			.orientation = orientation,
+			.delta = delta * 15,
+			.delta_discrete = delta
+		};
+		dispatch_cursor_axis(cursor, &event);
+		return cmd_results_new(CMD_SUCCESS, NULL, NULL);
+	} else if (!button) {
+		return cmd_results_new(CMD_INVALID, "curor",
+				"Unknown button %s", button_str);
 	}
 	dispatch_cursor_button(cursor, NULL, 0, button, state);
 	return cmd_results_new(CMD_SUCCESS, NULL, NULL);

sway/input/cursor.c

@@ -1082,11 +1082,13 @@ static uint32_t wl_axis_to_button(struct wlr_event_pointer_axis *event) {
 	}
 }
 
-static void dispatch_cursor_axis(struct sway_cursor *cursor,
+void dispatch_cursor_axis(struct sway_cursor *cursor,
 		struct wlr_event_pointer_axis *event) {
 	struct sway_seat *seat = cursor->seat;
-	struct sway_input_device *input_device = event->device->data;
-	struct input_config *ic = input_device_get_config(input_device);
+	struct sway_input_device *input_device =
+		event->device ? event->device->data : NULL;
+	struct input_config *ic =
+		input_device ? input_device_get_config(input_device) : NULL;
 
 	// Determine what's under the cursor
 	struct wlr_surface *surface = NULL;
@@ -1109,7 +1111,8 @@ static void dispatch_cursor_axis(struct sway_cursor *cursor,
 	// Gather information needed for mouse bindings
 	struct wlr_keyboard *keyboard = wlr_seat_get_keyboard(seat->wlr_seat);
 	uint32_t modifiers = keyboard ? wlr_keyboard_get_modifiers(keyboard) : 0;
-	struct wlr_input_device *device = input_device->wlr_device;
+	struct wlr_input_device *device =
+		input_device ? input_device->wlr_device : NULL;
 	char *dev_id = device ? input_device_get_identifier(device) : strdup("*");
 	uint32_t button = wl_axis_to_button(event);
 

sway/sway-input.5.scd

@@ -141,6 +141,19 @@ in their own "seat").
 	Attach an input device to this seat by its input identifier. A special
 	value of "\*" will attach all devices to the seat.
 
+*seat* <seat> cursor move|set <x> <y>
+	Move specified seat's cursor relative to current position or wrap to
+	absolute coordinates (with respect to the global coordinate space).
+	Specifying either value as 0 will not update that coordinate.
+
+*seat* <seat> cursor press|release button[1-9]|<event-name-or-code>
+	Simulate pressing (or releasing) the specified mouse button on the
+	specified seat. The button can either be provided as a button event name or
+	event code, which can be obtained from `libinput debug-events`, or as an x11
+	mouse button (button[1-9]). If using button[4-7], which map to axes, an axis
+	event will be simulated, however _press_ and _release_ will be ignored and
+	both will occur.
+
 *seat* <name> fallback true|false
 	Set this seat as the fallback seat. A fallback seat will attach any device
 	not explicitly attached to another seat (similar to a "default" seat).

sway/sway.5.scd

@@ -491,15 +491,6 @@ The default colors are:
 *seat* <seat> <seat-subcommands...>
 	For details on seat subcommands, see *sway-input*(5).
 
-*seat* <seat> cursor move|set <x> <y>
-	Move specified seat's cursor relative to current position or wrap to
-	absolute coordinates (with respect to the global coordinate space).
-	Specifying either value as 0 will not update that coordinate.
-
-*seat* <seat> cursor press|release left|right|1|2|3...
-	Simulate pressing (or releasing) the specified mouse button on the
-	specified seat.
-
 *kill*
 	Kills (closes) the currently focused container and all of its children.