Add a ratbag_button_set_type

This might not be part of the final API, but it is rather convenient
to use right now.

Signed-off-by: Benjamin Tissoires <benjamin.tissoires@gmail.com>

src/libratbag.c

@@ -609,6 +609,22 @@ ratbag_button_get_type(struct ratbag_button *button)
 	return button->type;
 }
 
+LIBRATBAG_EXPORT int
+ratbag_button_set_type(struct ratbag_button *button, enum ratbag_button_type type)
+{
+	enum ratbag_button_type orig_type = button->type;
+	int rc;
+
+	if (!button->device->driver->write_button)
+		return -ENOTSUP;
+
+	button->type = type;
+	rc = button->device->driver->write_button(button->device, button->profile, button);
+	if (rc)
+		button->type = orig_type;
+	return rc;
+}
+
 LIBRATBAG_EXPORT struct ratbag_button *
 ratbag_button_ref(struct ratbag_button *button)
 {

src/libratbag.h

@@ -521,6 +521,21 @@ enum ratbag_button_type {
 enum ratbag_button_type
 ratbag_button_get_type(struct ratbag_button *button);
 
+/**
+ * @ingroup device
+ *
+ * Change the type of the physical button. This function is intended to be
+ * used by configuration tools to configure devices.
+ *
+ * FIXME: if we do this with linux/input.h instead, we need to add things like
+ * BTN_RESOLUTION_UP/DOWN there. But this is supposed to describe the
+ * physical location of the button, so input.h is not a good match.
+ *
+ * @return The error code or 0 on success.
+ */
+int
+ratbag_button_set_type(struct ratbag_button *button, enum ratbag_button_type type);
+
 /**
  * @ingroup device
  *

src/libratbag.sym

@@ -5,6 +5,7 @@ global:
 	ratbag_create_context;
 	ratbag_button_ref;
 	ratbag_button_get_type;
+	ratbag_button_set_type;
 	ratbag_button_unref;
 	ratbag_device_unref;
 	ratbag_device_get_active_profile;