3 files changed, 40 insertions, 2 deletions
diff --git a/sway/commands/input.c b/sway/commands/input.c
index c50926a8..b5765c38 100644
--- a/sway/commands/input.c
+++ b/sway/commands/input.c
@@ -22,6 +22,7 @@ static struct cmd_handler input_handlers[] = {
 	{ "repeat_delay", input_cmd_repeat_delay },
 	{ "repeat_rate", input_cmd_repeat_rate },
 	{ "scroll_button", input_cmd_scroll_button },
+	{ "scroll_factor", input_cmd_scroll_factor },
 	{ "scroll_method", input_cmd_scroll_method },
 	{ "tap", input_cmd_tap },
 	{ "tap_button_map", input_cmd_tap_button_map },
diff --git a/sway/commands/input/pointer_accel.c b/sway/commands/input/pointer_accel.c
index df487b1c..efd81ee6 100644
--- a/sway/commands/input/pointer_accel.c
+++ b/sway/commands/input/pointer_accel.c
@@ -1,8 +1,10 @@
+#include <math.h>
 #include <stdlib.h>
 #include <string.h>
 #include "sway/config.h"
 #include "sway/commands.h"
 #include "sway/input/input-manager.h"
+#include "util.h"
 
 struct cmd_results *input_cmd_pointer_accel(int argc, char **argv) {
 	struct cmd_results *error = NULL;
@@ -15,8 +17,11 @@ struct cmd_results *input_cmd_pointer_accel(int argc, char **argv) {
 			"pointer_accel", "No input device defined.");
 	}
 
-	float pointer_accel = atof(argv[0]);
-	if (pointer_accel < -1 || pointer_accel > 1) {
+	float pointer_accel = parse_float(argv[0]);
+	if (isnan(pointer_accel)) {
+		return cmd_results_new(CMD_INVALID, "pointer_accel",
+			"Invalid pointer accel; expected float.");
+	} if (pointer_accel < -1 || pointer_accel > 1) {
 		return cmd_results_new(CMD_INVALID, "pointer_accel",
 			"Input out of range [-1, 1]");
 	}
diff --git a/sway/commands/input/scroll_factor.c b/sway/commands/input/scroll_factor.c
new file mode 100644
index 00000000..52d943b0
--- /dev/null
+++ b/sway/commands/input/scroll_factor.c
@@ -0,0 +1,32 @@
+#include <errno.h>
+#include <math.h>
+#include <stdlib.h>
+#include <string.h>
+#include "sway/config.h"
+#include "sway/commands.h"
+#include "sway/input/input-manager.h"
+#include "util.h"
+
+struct cmd_results *input_cmd_scroll_factor(int argc, char **argv) {
+	struct cmd_results *error = NULL;
+	if ((error = checkarg(argc, "scroll_factor", EXPECTED_AT_LEAST, 1))) {
+		return error;
+	}
+	struct input_config *ic = config->handler_context.input_config;
+	if (!ic) {
+		return cmd_results_new(CMD_FAILURE,
+			"scroll_factor", "No input device defined.");
+	}
+
+	float scroll_factor = parse_float(argv[0]);
+	if (isnan(scroll_factor)) {
+		return cmd_results_new(CMD_INVALID, "scroll_factor",
+			"Invalid scroll factor; expected float.");
+	} else if (scroll_factor < 0) {
+		return cmd_results_new(CMD_INVALID, "scroll_factor",
+			"Scroll factor cannot be negative.");
+	}
+	ic->scroll_factor = scroll_factor;
+
+	return cmd_results_new(CMD_SUCCESS, NULL, NULL);
+}