swayfx/sway/commands/input/scroll_button.c

#include <libevdev/libevdev.h>
#include "sway/config.h"
#include "sway/commands.h"
#include "sway/input/cursor.h"

struct cmd_results *input_cmd_scroll_button(int argc, char **argv) {
	struct cmd_results *error = NULL;
	if ((error = checkarg(argc, "scroll_button", EXPECTED_AT_LEAST, 1))) {
		return error;
	}
	struct input_config *ic = config->handler_context.input_config;
	if (!ic) {
		return cmd_results_new(CMD_FAILURE, "scroll_button",
			"No input device defined.");
	}

	if (strcmp(*argv, "disable") == 0) {
		ic->scroll_button = 0;
		return cmd_results_new(CMD_SUCCESS, NULL, NULL);
	}

	char *message = NULL;
	uint32_t button = get_mouse_button(*argv, &message);
	if (message) {
		error = cmd_results_new(CMD_INVALID, "scroll_button", message);
		free(message);
		return error;
	} else if (button == SWAY_SCROLL_UP || button == SWAY_SCROLL_DOWN
			|| button == SWAY_SCROLL_LEFT || button == SWAY_SCROLL_RIGHT) {
		return cmd_results_new(CMD_INVALID, "scroll_button",
				"X11 axis buttons are not supported for scroll_button");
	} else if (!button) {
		return cmd_results_new(CMD_INVALID, "scroll_button",
				"Unknown button %s", *argv);
	}
	ic->scroll_button = button;

	return cmd_results_new(CMD_SUCCESS, NULL, NULL);
}