Make use of Box instead of my custom Region struct

include/ftxui/component/screen_interactive.hpp

@@ -26,13 +26,6 @@ struct Event;
 using Component = std::shared_ptr<ComponentBase>;
 class ScreenInteractivePrivate;
 
-typedef struct {
-  uint16_t startx = 0;
-  uint16_t endx = 0;
-  uint16_t starty = 0;
-  uint16_t endy = 0;
-} Region;
-
 class ScreenInteractive : public Screen {
  public:
   // Constructors:
@@ -137,11 +130,6 @@ class ScreenInteractive : public Screen {
   bool force_handle_ctrl_c_ = true;
   bool force_handle_ctrl_z_ = true;
 
-  bool selection_enabled = false;
-  CapturedMouse selection_pending;
-  Region selection_region;
-  std::string selection_text;
-
   // The style of the cursor to restore on exit.
   int cursor_reset_shape_ = 1;
 

include/ftxui/screen/screen.hpp

@@ -10,6 +10,7 @@
 
 #include "ftxui/screen/image.hpp"     // for Pixel, Image
 #include "ftxui/screen/terminal.hpp"  // for Dimensions
+#include "ftxui/component/captured_mouse.hpp"  // for CapturedMouse
 
 namespace ftxui {
 
@@ -62,6 +63,11 @@ class Screen : public Image {
   Cursor cursor() const { return cursor_; }
   void SetCursor(Cursor cursor) { cursor_ = cursor; }
 
+  bool selection_enabled = false;
+  CapturedMouse selection_pending;
+  Box selection_region;
+  std::string selection_text;
+
   // Store an hyperlink in the screen. Return the id of the hyperlink. The id is
   // used to identify the hyperlink when the user click on it.
   uint8_t RegisterHyperlink(const std::string& link);