Merge pull request #2252 from rkubosz/scroll-button-option

feature: scroll button option for input devices

2 files changed, 45 insertions, 0 deletions

diff --git a/sway/commands/input.c b/sway/commands/input.c
index 574e1f8c..e7906b0e 100644
--- a/sway/commands/input.c
+++ b/sway/commands/input.c
@@ -20,6 +20,7 @@ static struct cmd_handler input_handlers[] = {
 	{ "pointer_accel", input_cmd_pointer_accel },
 	{ "repeat_delay", input_cmd_repeat_delay },
 	{ "repeat_rate", input_cmd_repeat_rate },
+	{ "scroll_button", input_cmd_scroll_button },
 	{ "scroll_method", input_cmd_scroll_method },
 	{ "tap", input_cmd_tap },
 	{ "xkb_layout", input_cmd_xkb_layout },
diff --git a/sway/commands/input/scroll_button.c b/sway/commands/input/scroll_button.c
new file mode 100644
index 00000000..350fcca2
--- /dev/null
+++ b/sway/commands/input/scroll_button.c
@@ -0,0 +1,44 @@
+#include <string.h>
+#include <strings.h>
+#include <errno.h>
+#include "sway/config.h"
+#include "sway/commands.h"
+#include "sway/input/input-manager.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 *current_input_config =
+		config->handler_context.input_config;
+	if (!current_input_config) {
+		return cmd_results_new(CMD_FAILURE, "scroll_button",
+			"No input device defined.");
+	}
+	struct input_config *new_config =
+		new_input_config(current_input_config->identifier);
+
+	errno = 0;
+	char *endptr;
+	int scroll_button = strtol(*argv, &endptr, 10);
+	if (endptr == *argv && scroll_button == 0) {
+		free_input_config(new_config);
+		return cmd_results_new(CMD_INVALID, "scroll_button",
+				"Scroll button identifier must be an integer.");
+	}
+	if (errno == ERANGE) {
+		free_input_config(new_config);
+		return cmd_results_new(CMD_INVALID, "scroll_button",
+				"Scroll button identifier out of range.");
+	}
+	if (scroll_button < 0) {
+		free_input_config(new_config);
+		return cmd_results_new(CMD_INVALID, "scroll_button",
+				"Scroll button identifier cannot be negative.");
+	}
+	new_config->scroll_button = scroll_button;
+
+	apply_input_config(new_config);
+	return cmd_results_new(CMD_SUCCESS, NULL, NULL);
+}