Add Changelog.

CHANGELOG.md

@@ -16,6 +16,9 @@ current (development)
 - Feature: Add support for `Input`'s insert mode. Add `InputOption::insert`
   option. Added by @mingsheng13.
 - Feature: Add `DropdownOption` to configure the dropdown. See #826.
+- Feature: Add support for Selection. Thanks @clement-roblot. See #926.
+  - See `ScreenInteractive::GetSelection()`.
+  - See `ScreenInteractive::SelectionChange(...)` listener.
 - Bugfix/Breaking change: `Mouse transition`:
   - Detect when the mouse move, as opposed to being pressed.
     The Mouse::Moved motion was added.
@@ -40,6 +43,13 @@ current (development)
 - Feature: Add `hscroll_indicator`. It display an horizontal indicator
   reflecting the current scroll position. Proposed by @ibrahimnasson in
   [issue 752](https://github.com/ArthurSonzogni/FTXUI/issues/752)
+- Feature: Add support for Selection. Thanks @clement-roblot. See #926.
+  - See `selectionColor` decorator.
+  - See `selectionBackgroundColor` decorator.
+  - See `selectionForegroundColor` decorator.
+  - See `selectionStyle(style)` decorator.
+  - See `selectionStyleReset` decorator.
+
 
 ### Screen
 - Feature: Add `Box::IsEmpty()`.

examples/component/selection.cpp

@@ -14,12 +14,10 @@ using namespace ftxui;
 
 Element LoremIpsum() {
   return vbox({
-      text("Lorem ipsum dolor sit amet, consectetur adipiscing elit, sed do "
-           "eiusmod tempor incididunt ut labore et dolore magna aliqua."),
-      text("Ut enim ad minim veniam, quis nostrud exercitation ullamco laboris "
-           "nisi ut aliquip ex ea commodo consequat."),
-      text("Duis aute irure dolor in reprehenderit in voluptate velit esse "
-           "cillum dolore eu fugiat nulla pariatur."),
+      text("FTXUI: A powerful library for building user interfaces."),
+      text("Enjoy a rich set of components and a declarative style."),
+      text("Create beautiful and responsive UIs with minimal effort."),
+      text("Join the community and experience the power of FTXUI."),
   });
 }
 
@@ -31,9 +29,9 @@ int main() {
 
   int selection_change_counter = 0;
   std::string selection_content = "";
-  screen.SelectionOnChange([&] {
+  screen.SelectionChange([&] {
     selection_change_counter++;
-    selection_content = screen.SelectionAsString();
+    selection_content = screen.GetSelection();
   });
 
   // The components:
@@ -42,7 +40,7 @@ int main() {
         text("Select changed: " + std::to_string(selection_change_counter) +
              " times"),
         text("Currently selected: "),
-        paragraph(selection_content) | frame | border | xflex |
+        paragraph(selection_content) | vscroll_indicator | frame | border |
             size(HEIGHT, EQUAL, 10),
         window(text("Horizontal split"), hbox({
                                              LoremIpsum(),
@@ -58,7 +56,7 @@ int main() {
                                            separator(),
                                            LoremIpsum(),
                                        })),
-        window(text("Grid split"),
+        window(text("Grid split with different style"),
                vbox({
                    hbox({
                        LoremIpsum(),

include/ftxui/component/screen_interactive.hpp

@@ -70,8 +70,8 @@ class ScreenInteractive : public Screen {
   void ForceHandleCtrlZ(bool force);
 
   // Selection API.
-  std::string SelectionAsString();
-  void SelectionOnChange(std::function<void()> callback);
+  std::string GetSelection();
+  void SelectionChange(std::function<void()> callback);
 
  private:
   void ExitNow();

src/ftxui/component/screen_interactive.cpp

@@ -577,14 +577,14 @@ void ScreenInteractive::ForceHandleCtrlZ(bool force) {
 }
 
 /// @brief Returns the content of the current selection
-std::string ScreenInteractive::SelectionAsString() {
+std::string ScreenInteractive::GetSelection() {
   if (!selection_) {
     return "";
   }
   return selection_->GetParts();
 }
 
-void ScreenInteractive::SelectionOnChange(std::function<void()> callback) {
+void ScreenInteractive::SelectionChange(std::function<void()> callback) {
   selection_on_change_ = std::move(callback);
 }
 

src/ftxui/dom/selection_test.cpp

@@ -58,20 +58,20 @@ Event MouseMove(int x, int y) {
 TEST(SelectionTest, DefaultSelection) {
   auto component = Renderer([&] { return text("Lorem ipsum dolor"); });
   auto screen = ScreenInteractive::FixedSize(20, 1);
-  EXPECT_EQ(screen.SelectionAsString(), "");
+  EXPECT_EQ(screen.GetSelection(), "");
   Loop loop(&screen, component);
   screen.PostEvent(MousePressed(3, 1));
   screen.PostEvent(MouseReleased(10, 1));
   loop.RunOnce();
 
-  EXPECT_EQ(screen.SelectionAsString(), "rem ipsu");
+  EXPECT_EQ(screen.GetSelection(), "rem ipsu");
 }
 
-TEST(SelectionTest, SelectionOnChange) {
+TEST(SelectionTest, SelectionChange) {
   int selectionChangeCounter = 0;
   auto component = Renderer([&] { return text("Lorem ipsum dolor"); });
   auto screen = ScreenInteractive::FixedSize(20, 1);
-  screen.SelectionOnChange([&] { selectionChangeCounter++; });
+  screen.SelectionChange([&] { selectionChangeCounter++; });
 
   Loop loop(&screen, component);
   loop.RunOnce();
@@ -97,7 +97,7 @@ TEST(SelectionTest, SelectionOnChange) {
   loop.RunOnce();
   EXPECT_EQ(selectionChangeCounter, 3);
 
-  EXPECT_EQ(screen.SelectionAsString(), "rem ipsu");
+  EXPECT_EQ(screen.GetSelection(), "rem ipsu");
 }
 
 // Check that submitting multiple mouse events quickly doesn't trigger multiple
@@ -106,7 +106,7 @@ TEST(SelectionTest, SelectionOnChangeSquashedEvents) {
   int selectionChangeCounter = 0;
   auto component = Renderer([&] { return text("Lorem ipsum dolor"); });
   auto screen = ScreenInteractive::FixedSize(20, 1);
-  screen.SelectionOnChange([&] { selectionChangeCounter++; });
+  screen.SelectionChange([&] { selectionChangeCounter++; });
 
   Loop loop(&screen, component);
   loop.RunOnce();
@@ -123,7 +123,7 @@ TEST(SelectionTest, SelectionOnChangeSquashedEvents) {
   loop.RunOnce();
   EXPECT_EQ(selectionChangeCounter, 2);
 
-  EXPECT_EQ(screen.SelectionAsString(), "rem ipsu");
+  EXPECT_EQ(screen.GetSelection(), "rem ipsu");
 }
 
 TEST(SelectionTest, StyleSelection) {