diff --git a/src/core/CharacterWidthDeterminer.h b/src/core/CharacterWidthDeterminer.h
new file mode 100644
index 0000000..4f9b83b
--- /dev/null
+++ b/src/core/CharacterWidthDeterminer.h
@@ -0,0 +1,12 @@
+#ifndef CHARACTERWIDTHDETERMINER_H
+#define CHARACTERWIDTHDETERMINER_H
+
+#include <stdint.h>
+
+class CharacterWidthDeterminer
+{
+public:
+    virtual int operator()(uint32_t character);
+};
+
+#endif