text: #include <string.h>
  #include <strings.h>
  #include "sway/config.h"
  #include "sway/commands.h"
  #include "sway/input/input-manager.h"
  
  struct cmd_results *input_cmd_scroll_method(int argc, char **argv) {
  	struct cmd_results *error = NULL;
  	if ((error = checkarg(argc, "scroll_method", EXPECTED_AT_LEAST, 1))) {
  		return error;
  	}
  	struct input_config *ic = config->handler_context.input_config;
  	if (!ic) {
  		return cmd_results_new(CMD_FAILURE, "No input device defined.");
  	}
  
  	if (strcasecmp(argv[0], "none") == 0) {
  		ic->scroll_method = LIBINPUT_CONFIG_SCROLL_NO_SCROLL;
  	} else if (strcasecmp(argv[0], "two_finger") == 0) {
  		ic->scroll_method = LIBINPUT_CONFIG_SCROLL_2FG;
  	} else if (strcasecmp(argv[0], "edge") == 0) {
  		ic->scroll_method = LIBINPUT_CONFIG_SCROLL_EDGE;
  	} else if (strcasecmp(argv[0], "on_button_down") == 0) {
  		ic->scroll_method = LIBINPUT_CONFIG_SCROLL_ON_BUTTON_DOWN;
  	} else {
  		return cmd_results_new(CMD_INVALID,
  			"Expected 'scroll_method <none|two_finger|edge|on_button_down>'");
  	}
  
  	return cmd_results_new(CMD_SUCCESS, NULL);
  }
  