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);

src/ftxui/component/screen_interactive.cpp

@@ -351,8 +351,7 @@ ScreenInteractive::ScreenInteractive(int dimx,
                                      bool use_alternative_screen)
     : Screen(dimx, dimy),
       dimension_(dimension),
-      use_alternative_screen_(use_alternative_screen),
-      selection_text("") {
+      use_alternative_screen_(use_alternative_screen) {
   task_receiver_ = MakeReceiver<Task>();
 }
 
@@ -844,10 +843,10 @@ bool ScreenInteractive::HandleSelection(Event event) {
       return false;
     }
     selection_enabled = true;
-    selection_region.startx = mouse.x;
-    selection_region.starty = mouse.y;
-    selection_region.endx = mouse.x;
-    selection_region.endy = mouse.y;
+    selection_region.x_min = mouse.x;
+    selection_region.y_min = mouse.y;
+    selection_region.x_max = mouse.x;
+    selection_region.y_max = mouse.y;
     return true;
   }
 
@@ -856,18 +855,18 @@ bool ScreenInteractive::HandleSelection(Event event) {
   }
 
   if (mouse.motion == Mouse::Moved) {
-    selection_region.endx = mouse.x;
-    selection_region.endy = mouse.y;
+    selection_region.x_max = mouse.x;
+    selection_region.y_max = mouse.y;
     return true;
   }
 
   if (mouse.motion == Mouse::Released) {
-    selection_region.endx = mouse.x;
-    selection_region.endy = mouse.y;
+    selection_region.x_max = mouse.x;
+    selection_region.y_max = mouse.y;
     selection_pending = nullptr;
 
-    if (selection_region.startx == selection_region.endx &&
-        selection_region.starty == selection_region.endy) {
+    if (selection_region.x_min == selection_region.x_max &&
+        selection_region.y_min == selection_region.y_max) {
       selection_enabled = false;
       return true;
     }
@@ -884,10 +883,10 @@ void ScreenInteractive::RefreshSelection() {
   }
   selection_text = "";
 
-  for (int y = std::min(selection_region.starty, selection_region.endy);
-       y <= std::max(selection_region.starty, selection_region.endy); ++y) {
-    for (int x = std::min(selection_region.startx, selection_region.endx);
-         x <= std::max(selection_region.startx, selection_region.endx) - 1;
+  for (int y = std::min(selection_region.y_min, selection_region.y_max);
+       y <= std::max(selection_region.y_min, selection_region.y_max); ++y) {
+    for (int x = std::min(selection_region.x_min, selection_region.x_max);
+         x <= std::max(selection_region.x_min, selection_region.x_max) - 1;
          ++x) {
       if (PixelAt(x, y).selectable == true) {
         PixelAt(x, y).inverted ^= true;

src/ftxui/screen/screen.cpp

@@ -389,7 +389,9 @@ Screen Screen::Create(Dimensions dimension) {
   return {dimension.dimx, dimension.dimy};
 }
 
-Screen::Screen(int dimx, int dimy) : Image{dimx, dimy} {
+Screen::Screen(int dimx, int dimy) :
+      Image{dimx, dimy},
+      selection_text("") {
 #if defined(_WIN32)
   // The placement of this call is a bit weird, however we can assume that
   // anybody who instantiates a Screen object eventually wants to output