Refactored the ansi_parser into a class that can be reused between render calls.

render.hpp

@@ -7,6 +7,7 @@
 #include <SFML/Graphics.hpp>
 #include "point.hpp"
 #include <codecvt>
+#include "ansi_parser.hpp"
 
 using ftxui::Canvas, ftxui::Screen;
 
@@ -41,6 +42,9 @@ struct SFMLRender {
   Screen& $screen;
   sf::Text $ui_text;
   std::wstring_convert<std::codecvt_utf8_utf16<wchar_t>> $converter;
+  sf::Color $default_fg;
+  sf::Color $default_bg;
+  ANSIParser $ansi;
 
   SFMLRender(Canvas &canvas, Screen &map_screen, Screen &screen);