Add recursive selection style.

include/ftxui/component/screen_interactive.hpp

@@ -71,7 +71,6 @@ class ScreenInteractive : public Screen {
 
   // Selection API.
   std::string GetSelectedContent(Component component);
-  void setSelectionOptions(SelectionOption option);
 
  private:
   void ExitNow();
@@ -137,14 +136,12 @@ class ScreenInteractive : public Screen {
   int cursor_reset_shape_ = 1;
 
   // Selection API:
-  bool selection_enabled_ = false;
   CapturedMouse selection_pending_;
   int selection_start_x_ = 0;
   int selection_start_y_ = 0;
   int selection_end_x_ = 0;
   int selection_end_y_ = 0;
   bool selection_changed = false;
-  SelectionOption selection_options_ = SelectionOption::Simple();
 
   friend class Loop;
 

include/ftxui/dom/elements.hpp

@@ -113,7 +113,11 @@ Decorator focusPositionRelative(float x, float y);
 Element automerge(Element child);
 Decorator hyperlink(std::string link);
 Element hyperlink(std::string link, Element child);
-Element unselectable(Element child);
+Element selectionStyleReset(Element);
+Decorator selectionColor(Color foreground);
+Decorator selectionBackgroundColor(Color foreground);
+Decorator selectionForegroundColor(Color foreground);
+Decorator selectionStyle(std::function<void(Pixel&)> style);
 
 // --- Layout is
 // Horizontal, Vertical or stacked set of elements.

include/ftxui/dom/selection.hpp

@@ -7,34 +7,16 @@
 
 #include <functional>
 
-#include "ftxui/screen/box.hpp"  // for Box
+#include "ftxui/screen/box.hpp"    // for Box
 #include "ftxui/screen/pixel.hpp"  // for Pixel
 
 namespace ftxui {
 
-/// @brief Option for the selection of content.
-/// @ingroup component
-struct SelectionOption {
-  /// @brief Selection is simply inverted:
-  static SelectionOption Simple();
-
-  // Style:
-  std::function<void(Pixel& pixel)> transform = [](Pixel& pixel) {
-
-    pixel.inverted = true;
-  };
-
-  // Observers:
-  /// Called when the selection changed.
-  std::function<void()> on_change = [] {};
-};
-
 /// @brief Represent a selection in the terminal.
 class Selection {
  public:
-  Selection(int start_x, int start_y, int end_x, int end_y, SelectionOption option = SelectionOption::Simple());
+  Selection(int start_x, int start_y, int end_x, int end_y);
   const Box& GetBox() const;
-  const SelectionOption& GetOption() const;
 
   Selection SaturateHorizontal(Box box);
   Selection SaturateVertical(Box box);
@@ -46,7 +28,6 @@ class Selection {
   const int end_x_;
   const int end_y_;
   const Box box_;
-  const SelectionOption option;
 };
 
 }  // namespace ftxui

include/ftxui/screen/screen.hpp

@@ -4,12 +4,14 @@
 #ifndef FTXUI_SCREEN_SCREEN_HPP
 #define FTXUI_SCREEN_SCREEN_HPP
 
-#include <cstdint>  // for uint8_t
-#include <string>   // for string, basic_string, allocator
-#include <vector>   // for vector
+#include <cstdint>     // for uint8_t
+#include <functional>  // for function
+#include <string>      // for string, basic_string, allocator
+#include <vector>      // for vector
 
 #include "ftxui/screen/image.hpp"     // for Pixel, Image
 #include "ftxui/screen/terminal.hpp"  // for Dimensions
+#include "ftxui/util/autoreset.hpp"   // for AutoReset
 
 namespace ftxui {
 
@@ -67,9 +69,18 @@ class Screen : public Image {
   uint8_t RegisterHyperlink(const std::string& link);
   const std::string& Hyperlink(uint8_t id) const;
 
+  using SelectionStyle = std::function<void(Pixel&)>;
+  const SelectionStyle& GetSelectionStyle() const;
+  void SetSelectionStyle(SelectionStyle decorator);
+
  protected:
   Cursor cursor_;
   std::vector<std::string> hyperlinks_ = {""};
+
+  // The current selection style. This is overridden by various dom elements.
+  SelectionStyle selection_style_ = [](Pixel& pixel) {
+    pixel.inverted ^= true;
+  };
 };
 
 }  // namespace ftxui