Add a ratbag_device_get_svg_name() function

To retrieve which SVG file is associated to which device.

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

src/libratbag.h

@@ -386,6 +386,16 @@ ratbag_device_get_user_data(const struct ratbag_device *device);
 const char *
 ratbag_device_get_name(const struct ratbag_device* device);
 
+/**
+ * @ingroup device
+ *
+ * @param device A previously initialized ratbag device
+ * @return The file name of the svg drawing associated with the given ratbag.
+ * If there is no file associated to the device, NULL is returned.
+ */
+const char *
+ratbag_device_get_svg_name(const struct ratbag_device* device);
+
 /**
  * @ingroup device
  */