Remove redundant member from ButtonBase (#1076)

Stop using Sender/Receiver in TerminalInputParser.

This will help removing usage of thread.

At some point, my goal is to have an initialization step when installing
the ScreenInteractive so that we can provide the terminal ID
synchronously without losing some events. This will help with:
https://github.com/ArthurSonzogni/FTXUI/pull/1069

CMakeLists.txt

@@ -144,7 +144,6 @@ add_library(component
   src/ftxui/component/resizable_split.cpp
   src/ftxui/component/screen_interactive.cpp
   src/ftxui/component/slider.cpp
-  src/ftxui/component/terminal_id.cpp
   src/ftxui/component/terminal_input_parser.cpp
   src/ftxui/component/terminal_input_parser.hpp
   src/ftxui/component/util.cpp

examples/component/CMakeLists.txt

@@ -46,7 +46,6 @@ example(slider_direction)
 example(slider_rgb)
 example(tab_horizontal)
 example(tab_vertical)
-example(terminal_id)
 example(textarea)
 example(toggle)
 example(window)

examples/component/button.cpp

@@ -1,9 +1,64 @@
-#include "ftxui/component/component.hpp"
-#include "ftxui/component/screen_interactive.hpp"
+// Copyright 2020 Arthur Sonzogni. All rights reserved.
+// Use of this source code is governed by the MIT license that can be found in
+// the LICENSE file.
+#include <memory>  // for shared_ptr, __shared_ptr_access
+#include <string>  // for operator+, to_string
 
-int main(){
-    auto screen = ftxui::ScreenInteractive::Fullscreen();
-    auto testComponent = ftxui::Renderer([](){return ftxui::text("test Component");});
-    screen.Loop(testComponent);
-    return 0;
+#include "ftxui/component/captured_mouse.hpp"  // for ftxui
+#include "ftxui/component/component.hpp"  // for Button, Horizontal, Renderer
+#include "ftxui/component/component_base.hpp"      // for ComponentBase
+#include "ftxui/component/screen_interactive.hpp"  // for ScreenInteractive
+#include "ftxui/dom/elements.hpp"  // for separator, gauge, text, Element, operator|, vbox, border
+
+using namespace ftxui;
+
+// This is a helper function to create a button with a custom style.
+// The style is defined by a lambda function that takes an EntryState and
+// returns an Element.
+// We are using `center` to center the text inside the button, then `border` to
+// add a border around the button, and finally `flex` to make the button fill
+// the available space.
+ButtonOption Style() {
+  auto option = ButtonOption::Animated();
+  option.transform = [](const EntryState& s) {
+    auto element = text(s.label);
+    if (s.focused) {
+      element |= bold;
+    }
+    return element | center | borderEmpty | flex;
+  };
+  return option;
+}
+
+int main() {
+  int value = 50;
+
+  // clang-format off
+  auto btn_dec_01 = Button("-1", [&] { value += 1; }, Style());
+  auto btn_inc_01 = Button("+1", [&] { value -= 1; }, Style());
+  auto btn_dec_10 = Button("-10", [&] { value -= 10; }, Style());
+  auto btn_inc_10 = Button("+10", [&] { value += 10; }, Style());
+  // clang-format on
+
+  // The tree of components. This defines how to navigate using the keyboard.
+  // The selected `row` is shared to get a grid layout.
+  int row = 0;
+  auto buttons = Container::Vertical({
+      Container::Horizontal({btn_dec_01, btn_inc_01}, &row) | flex,
+      Container::Horizontal({btn_dec_10, btn_inc_10}, &row) | flex,
+  });
+
+  // Modify the way to render them on screen:
+  auto component = Renderer(buttons, [&] {
+    return vbox({
+               text("value = " + std::to_string(value)),
+               separator(),
+               buttons->Render() | flex,
+           }) |
+           flex | border;
+  });
+
+  auto screen = ScreenInteractive::FitComponent();
+  screen.Loop(component);
+  return 0;
 }

examples/component/terminal_id.cpp

@@ -1,33 +0,0 @@
-// Copyright 2025 Arthur Sonzogni. All rights reserved.
-// Use of this source code is governed by the MIT license that can be found in
-// the LICENSE file.
-
-#include "ftxui/component/component.hpp"       // for Renderer
-#include "ftxui/component/screen_interactive.hpp"  // for ScreenInteractive
-#include "ftxui/dom/elements.hpp"  // for text, hbox, separator, Element, operator|, vbox, border
-
-int main() {
-	using namespace ftxui;
-
-	std::string terminal_id = "UNKNOWN";
-
-	auto screen =
-		ScreenInteractive::TerminalOutput();
-
-	screen.OnTerminalIDUpdate([&terminal_id] (
-		TerminalID const& terminal_id_update)
-	{
-		std::stringstream stream;
-		stream << terminal_id_update;
-		terminal_id = stream.str();
-	});
-
-	auto renderer = Renderer([&]
-	{
-		return vbox({
-			text("Terminal id " + terminal_id),
-		}) | border;
-	});
-
-	screen.Loop(renderer);
-}

include/ftxui/component/event.hpp

@@ -4,9 +4,8 @@
 #ifndef FTXUI_COMPONENT_EVENT_HPP
 #define FTXUI_COMPONENT_EVENT_HPP
 
-#include <ftxui/component/mouse.hpp>       // for Mouse
-#include <ftxui/component/terminal_id.hpp> // for TerminalID
-#include <string>                          // for string, operator==
+#include <ftxui/component/mouse.hpp>  // for Mouse
+#include <string>                     // for string, operator==
 
 namespace ftxui {
 
@@ -36,7 +35,6 @@ struct Event {
   static Event Mouse(std::string, Mouse mouse);
   static Event CursorPosition(std::string, int x, int y);  // Internal
   static Event CursorShape(std::string, int shape);        // Internal
-  static Event TerminalID(std::string input, enum TerminalID terminal_id); // Internal
 
   // --- Arrow ---
   static const Event ArrowLeft;
@@ -119,9 +117,6 @@ struct Event {
   bool is_cursor_shape() const { return type_ == Type::CursorShape; }
   int cursor_shape() const { return data_.cursor_shape; }
 
-  bool is_terminal_id() const { return type_ == Type::TerminalID; }
-  enum TerminalID terminal_id() const { return data_.terminal_id; }
-
   // Debug
   std::string DebugString() const;
 
@@ -137,7 +132,6 @@ struct Event {
     Mouse,
     CursorPosition,
     CursorShape,
-    TerminalID
   };
   Type type_ = Type::Unknown;
 
@@ -150,7 +144,6 @@ struct Event {
     struct Mouse mouse;
     struct Cursor cursor;
     int cursor_shape;
-    enum TerminalID terminal_id;
   } data_ = {};
 
   std::string input_;

include/ftxui/component/screen_interactive.hpp

@@ -10,7 +10,6 @@
 #include <memory>                        // for shared_ptr
 #include <string>                        // for string
 #include <thread>                        // for thread
-#include <list>
 
 #include "ftxui/component/animation.hpp"       // for TimePoint
 #include "ftxui/component/captured_mouse.hpp"  // for CapturedMouse
@@ -25,8 +24,6 @@ class Loop;
 struct Event;
 
 using Component = std::shared_ptr<ComponentBase>;
-using TerminalIDUpdateCallback = std::function<void (const TerminalID &)>;
-
 class ScreenInteractivePrivate;
 
 /// @brief ScreenInteractive is a `Screen` that can handle events, run a main
@@ -75,10 +72,6 @@ class ScreenInteractive : public Screen {
   void ForceHandleCtrlC(bool force);
   void ForceHandleCtrlZ(bool force);
 
-  TerminalID TerminalId() const;
-
-  void OnTerminalIDUpdate(const TerminalIDUpdateCallback& callback);
-
   // Selection API.
   std::string GetSelection();
   void SelectionChange(std::function<void()> callback);
@@ -163,11 +156,6 @@ class ScreenInteractive : public Screen {
   std::unique_ptr<Selection> selection_;
   std::function<void()> selection_on_change_;
 
-  TerminalID m_terminal_id = TerminalID::Unknown;
-
-  using TerminalIDUpdateCallbackContainer = std::list<TerminalIDUpdateCallback>;
-  TerminalIDUpdateCallbackContainer terminal_id_callback_;
-
   friend class Loop;
 
  public:

include/ftxui/component/terminal_id.hpp

@@ -1,35 +0,0 @@
-// Copyright 2025 Arthur Sonzogni. All rights reserved.
-// Use of this source code is governed by the MIT license that can be found in
-// the LICENSE file.
-
-#ifndef FTXUI_COMPONENT_TERMINAL_ID_HPP
-#define FTXUI_COMPONENT_TERMINAL_ID_HPP
-
-#include <ostream>
-#include <string>
-
-namespace ftxui {
-
-/// @brief The TerminalID enum class represents different types of terminal
-/// emulators that FTXUI can detect. It is used to identify the terminal
-/// emulator in use, which can affect how FTXUI renders its output and handles
-/// input events.
-/// @ingroup component
-enum class TerminalID {
-  Unknown,
-  // --
-
-  Konsole,
-  LinuxVC,
-  Urxvt,
-  Vte,
-  Xterm,
-};
-
-std::ostream& operator<<(
-	std::ostream& os,
-	TerminalID terminal_id);
-
-}  // namespace ftxui
-
-#endif /* end of include guard: FTXUI_COMPONENT_TERMINAL_ID_HPP */

include/ftxui/dom/canvas.hpp

@@ -30,7 +30,7 @@ namespace ftxui {
 /// - 2x4 braille characters (1x1 pixel)
 /// - 2x2 block characters (2x2 pixels)
 /// - 2x4 normal characters (2x4 pixels)
-/// 
+///
 /// You need to multiply the x coordinate by 2 and the y coordinate by 4 to
 /// get the correct position in the terminal.
 ///

include/ftxui/dom/flexbox_config.hpp

@@ -12,7 +12,6 @@
 
 namespace ftxui {
 
-
 /// @brief FlexboxConfig is a configuration structure that defines the layout
 /// properties for a flexbox container.
 //

include/ftxui/screen/box.hpp

@@ -11,7 +11,7 @@ namespace ftxui {
 /// It is defined by its minimum and maximum coordinates along the x and y axes.
 /// Note that the coordinates are inclusive, meaning that the box includes both
 /// the minimum and maximum values.
-/// 
+///
 /// @ingroup screen
 struct Box {
   int x_min = 0;

src/ftxui/component/button.cpp

@@ -139,7 +139,6 @@ class ButtonBase : public ComponentBase, public ButtonOption {
  private:
   bool mouse_hover_ = false;
   Box box_;
-  ButtonOption option_;
   float animation_background_ = 0;
   float animation_foreground_ = 0;
   animation::Animator animator_background_ =

src/ftxui/component/component_fuzzer.cpp

@@ -2,6 +2,7 @@
 // Use of this source code is governed by the MIT license that can be found in
 // the LICENSE file.
 #include <cassert>
+#include <ftxui/component/event.hpp>
 #include <vector>
 #include "ftxui/component/component.hpp"
 #include "ftxui/component/terminal_input_parser.hpp"
@@ -212,16 +213,17 @@ extern "C" int LLVMFuzzerTestOneInput(const char* data, size_t size) {
   auto screen =
       Screen::Create(Dimension::Fixed(width), Dimension::Fixed(height));
 
-  auto event_receiver = MakeReceiver<Task>();
-  {
-    auto parser = TerminalInputParser(event_receiver->MakeSender());
-    for (size_t i = 0; i < size; ++i)
-      parser.Add(data[i]);
+  // Generate some events.
+  std::vector<Event> events;
+  auto parser =
+      TerminalInputParser([&](const Event& event) { events.push_back(event); });
+
+  for (size_t i = 0; i < size; ++i) {
+    parser.Add(data[i]);
   }
 
-  Task event;
-  while (event_receiver->Receive(&event)) {
-    component->OnEvent(std::get<Event>(event));
+  for (const auto& event : events) {
+    component->OnEvent(event);
     auto document = component->Render();
     Render(screen, document);
   }

src/ftxui/component/event.cpp

@@ -87,16 +87,6 @@ Event Event::CursorPosition(std::string input, int x, int y) {
   return event;
 }
 
-/// @internal
-// static
-Event Event::TerminalID(std::string input, enum TerminalID terminal_id) {
-  Event event;
-  event.input_ = std::move(input);
-  event.type_ = Type::TerminalID;
-  event.data_.terminal_id = terminal_id;
-  return event;
-}
-
 /// @brief Return a string representation of the event.
 std::string Event::DebugString() const {
   static std::map<Event, const char*> event_to_string = {

src/ftxui/component/loop.cpp

@@ -1,7 +1,6 @@
 // Copyright 2022 Arthur Sonzogni. All rights reserved.
 // Use of this source code is governed by the MIT license that can be found in
 // the LICENSE file.
-#include <iostream>
 #include "ftxui/component/loop.hpp"
 
 #include <utility>  // for move

src/ftxui/component/screen_interactive.cpp

@@ -84,7 +84,8 @@ constexpr int timeout_milliseconds = 20;
 
 void EventListener(std::atomic<bool>* quit, Sender<Task> out) {
   auto console = GetStdHandle(STD_INPUT_HANDLE);
-  auto parser = TerminalInputParser(out->Clone());
+  auto parser =
+      TerminalInputParser([&](Event event) { out->Send(std::move(event)); });
   while (!*quit) {
     // Throttle ReadConsoleInput by waiting 250ms, this wait function will
     // return if there is input in the console.
@@ -137,7 +138,8 @@ void EventListener(std::atomic<bool>* quit, Sender<Task> out) {
 
 // Read char from the terminal.
 void EventListener(std::atomic<bool>* quit, Sender<Task> out) {
-  auto parser = TerminalInputParser(std::move(out));
+  auto parser =
+      TerminalInputParser([&](Event event) { out->Send(std::move(event)); });
 
   char c;
   while (!*quit) {
@@ -173,7 +175,8 @@ int CheckStdinReady(int usec_timeout) {
 
 // Read char from the terminal.
 void EventListener(std::atomic<bool>* quit, Sender<Task> out) {
-  auto parser = TerminalInputParser(std::move(out));
+  auto parser =
+      TerminalInputParser([&](Event event) { out->Send(std::move(event)); });
 
   while (!*quit) {
     if (!CheckStdinReady(timeout_microseconds)) {
@@ -321,8 +324,6 @@ std::string DeviceStatusReport(DSRMode ps) {
   return CSI + std::to_string(int(ps)) + "n";
 }
 
-const std::string TerminalIdReport = "\x1b[0c";
-
 class CapturedMouseImpl : public CapturedMouseInterface {
  public:
   explicit CapturedMouseImpl(std::function<void(void)> callback)
@@ -726,9 +727,6 @@ void ScreenInteractive::Install() {
     enable({DECMode::kMouseSgrExtMode});
   }
 
-  // Report the Terminal ID.
-  std::cout << TerminalIdReport;
-
   // After installing the new configuration, flush it to the terminal to
   // ensure it is fully applied:
   Flush();
@@ -799,17 +797,6 @@ void ScreenInteractive::HandleTask(Component component, Task& task) {
         return;
       }
 
-      if (arg.is_terminal_id()) {
-        m_terminal_id = arg.terminal_id();
-
-        for(auto & callback : terminal_id_callback_) {
-          if (callback) {
-            callback(m_terminal_id);
-          }
-        }
-        return;
-      }
-
       if (arg.is_mouse()) {
         arg.mouse().x -= cursor_x_;
         arg.mouse().y -= cursor_y_;
@@ -1100,13 +1087,4 @@ bool ScreenInteractive::SelectionData::operator!=(
   return !(*this == other);
 }
 
-TerminalID ScreenInteractive::TerminalId() const {
-  return m_terminal_id;
-}
-
-void ScreenInteractive::OnTerminalIDUpdate(
-    const TerminalIDUpdateCallback& callback) {
-  terminal_id_callback_.push_back(callback);
-}
-
 }  // namespace ftxui.

src/ftxui/component/screen_interactive_test.cpp

@@ -27,9 +27,9 @@ namespace {
 // Capture the standard output (stdout) to a string.
 class StdCapture {
  public:
-  explicit StdCapture(std::string* captured)
-      : captured_(captured) {
-    if (pipe(pipefd_) != 0) return;
+  explicit StdCapture(std::string* captured) : captured_(captured) {
+    if (pipe(pipefd_) != 0)
+      return;
     old_stdout_ = dup(fileno(stdout));
     fflush(stdout);
     dup2(pipefd_[1], fileno(stdout));
@@ -188,9 +188,7 @@ TEST(ScreenInteractive, FixedSizeInitialFrame) {
     auto capture = StdCapture(&output);
 
     auto screen = ScreenInteractive::FixedSize(2, 2);
-    auto component = Renderer([&] {
-      return text("AB");
-    });
+    auto component = Renderer([&] { return text("AB"); });
 
     Loop loop(&screen, component);
     loop.RunOnce();
@@ -207,7 +205,6 @@ TEST(ScreenInteractive, FixedSizeInitialFrame) {
       "\x1B[?1003h"  // Enable mouse motion tracking.
       "\x1B[?1015h"  // Enable mouse wheel tracking.
       "\x1B[?1006h"  // Enable SGR mouse tracking.
-      "\x1B[0c"      // Query terminal ID.
       "\0"           // Flush stdout.
 
       // Reset the screen.
@@ -242,7 +239,6 @@ TEST(ScreenInteractive, FixedSizeInitialFrame) {
       "\r\n"sv;
   ASSERT_EQ(expected, output);
 #endif
-
 }
 
 }  // namespace ftxui

src/ftxui/component/terminal_id.cpp

@@ -1,41 +0,0 @@
-// Copyright 2025 Arthur Sonzogni. All rights reserved.
-// Use of this source code is governed by the MIT license that can be found in
-// the LICENSE file.
-
-#include "ftxui/component/terminal_id.hpp"
-
-namespace ftxui
-{
-
-std::ostream& operator<<(std::ostream& os, TerminalID terminal_id) {
-  switch (terminal_id) {
-    case TerminalID::Unknown: {
-      os << "Unknown";
-      break;
-    }
-    case TerminalID::Urxvt: {
-		  os << "Urxvt";
-			break;
-		}
-		case TerminalID::LinuxVC: {
-			os << "LinuxVC";
-			break;
-		}
-		case TerminalID::Konsole: {
-			os << "Konsole";
-			break;
-		}
-		case TerminalID::Vte: {
-			os << "Vte";
-			break;
-		}
-		case TerminalID::Xterm: {
-			os << "Xterm";
-			break;
-		}
-  }
-
-  return os;
-}
-
-}  // namespace ftxui

src/ftxui/component/terminal_input_parser.cpp

@@ -5,7 +5,7 @@
 
 #include <cstdint>                    // for uint32_t
 #include <ftxui/component/mouse.hpp>  // for Mouse, Mouse::Button, Mouse::Motion
-#include <ftxui/component/receiver.hpp>  // for SenderImpl, Sender
+#include <functional>                 // for std::function
 #include <map>
 #include <memory>   // for unique_ptr, allocator
 #include <utility>  // for move
@@ -90,7 +90,7 @@ const std::map<std::string, std::string> g_uniformize = {
     {"\x1B[X", "\x1B[24~"},  // F12
 };
 
-TerminalInputParser::TerminalInputParser(Sender<Task> out)
+TerminalInputParser::TerminalInputParser(std::function<void(Event)> out)
     : out_(std::move(out)) {}
 
 void TerminalInputParser::Timeout(int time) {
@@ -131,7 +131,7 @@ void TerminalInputParser::Send(TerminalInputParser::Output output) {
       return;
 
     case CHARACTER:
-      out_->Send(Event::Character(std::move(pending_)));
+      out_(Event::Character(std::move(pending_)));
       pending_.clear();
       return;
 
@@ -140,30 +140,25 @@ void TerminalInputParser::Send(TerminalInputParser::Output output) {
       if (it != g_uniformize.end()) {
         pending_ = it->second;
       }
-      out_->Send(Event::Special(std::move(pending_)));
+      out_(Event::Special(std::move(pending_)));
       pending_.clear();
     }
       return;
 
     case MOUSE:
-      out_->Send(Event::Mouse(std::move(pending_), output.mouse));  // NOLINT
+      out_(Event::Mouse(std::move(pending_), output.mouse));  // NOLINT
       pending_.clear();
       return;
 
     case CURSOR_POSITION:
-      out_->Send(Event::CursorPosition(std::move(pending_),  // NOLINT
-                                       output.cursor.x,      // NOLINT
-                                       output.cursor.y));    // NOLINT
+      out_(Event::CursorPosition(std::move(pending_),  // NOLINT
+                                      output.cursor.x,      // NOLINT
+                                      output.cursor.y));    // NOLINT
       pending_.clear();
       return;
 
     case CURSOR_SHAPE:
-      out_->Send(Event::CursorShape(std::move(pending_), output.cursor_shape));
-      pending_.clear();
-      return;
-
-    case TERMINAL_ID:
-      out_->Send(Event::TerminalID(std::move(pending_), output.terminal_id));
+      out_(Event::CursorShape(std::move(pending_), output.cursor_shape));
       pending_.clear();
       return;
   }
@@ -379,8 +374,6 @@ TerminalInputParser::Output TerminalInputParser::ParseCSI() {
           return ParseMouse(altered, false, std::move(arguments));
         case 'R':
           return ParseCursorPosition(std::move(arguments));
-        case 'c':
-          return ParseTerminalID(std::move(arguments));
         default:
           return SPECIAL;
       }
@@ -468,22 +461,4 @@ TerminalInputParser::Output TerminalInputParser::ParseCursorPosition(
   return output;
 }
 
-TerminalInputParser::Output TerminalInputParser::ParseTerminalID(
-    std::vector<int> arguments) {
-  if (arguments.empty()) {
-    return TerminalID::Unknown;
-  }
-
-  switch (arguments[0]) {
-    case 1:
-      return TerminalID::Xterm;
-    case 6:
-      return TerminalID::LinuxVC;
-    case 62:
-      return TerminalID::Konsole;
-    default:
-      return TerminalID::Unknown;
-  }
-}
-
 }  // namespace ftxui

src/ftxui/component/terminal_input_parser.hpp

@@ -4,13 +4,11 @@
 #ifndef FTXUI_COMPONENT_TERMINAL_INPUT_PARSER
 #define FTXUI_COMPONENT_TERMINAL_INPUT_PARSER
 
+#include <functional>
 #include <string>  // for string
 #include <vector>  // for vector
 
-#include "ftxui/component/mouse.hpp"       // for Mouse
-#include "ftxui/component/terminal_id.hpp" // for TerminalId
-#include "ftxui/component/receiver.hpp"    // for Sender
-#include "ftxui/component/task.hpp"        // for Task
+#include "ftxui/component/mouse.hpp"  // for Mouse
 
 namespace ftxui {
 struct Event;
@@ -18,7 +16,7 @@ struct Event;
 // Parse a sequence of |char| accross |time|. Produces |Event|.
 class TerminalInputParser {
  public:
-  explicit TerminalInputParser(Sender<Task> out);
+  explicit TerminalInputParser(std::function<void(Event)> out);
   void Timeout(int time);
   void Add(char c);
 
@@ -34,7 +32,6 @@ class TerminalInputParser {
     CURSOR_POSITION,
     CURSOR_SHAPE,
     SPECIAL,
-    TERMINAL_ID
   };
 
   struct CursorPosition {
@@ -48,14 +45,10 @@ class TerminalInputParser {
       Mouse mouse;
       CursorPosition cursor{};
       int cursor_shape;
-      TerminalID terminal_id;
     };
 
     Output(Type t)  // NOLINT
         : type(t) {}
-
-    Output(TerminalID terminal_id) // NOLINT
-        : type(TERMINAL_ID), terminal_id(terminal_id) {}
   };
 
   void Send(Output output);
@@ -67,9 +60,8 @@ class TerminalInputParser {
   Output ParseOSC();
   Output ParseMouse(bool altered, bool pressed, std::vector<int> arguments);
   Output ParseCursorPosition(std::vector<int> arguments);
-  Output ParseTerminalID(std::vector<int> arguments);
 
-  Sender<Task> out_;
+  std::function<void(Event)> out_;
   int position_ = -1;
   int timeout_ = 0;
   std::string pending_;

src/ftxui/component/terminal_input_parser_test.cpp

@@ -2,12 +2,12 @@
 // Use of this source code is governed by the MIT license that can be found in
 // the LICENSE file.
 #include <ftxui/component/mouse.hpp>  // for Mouse, Mouse::Left, Mouse::Middle, Mouse::Pressed, Mouse::Released, Mouse::Right
-#include <ftxui/component/task.hpp>   // for Task
+#include <functional>                 // for function
 #include <initializer_list>           // for initializer_list
 #include <memory>                     // for allocator, unique_ptr
+#include <vector>                     // for vector
 
 #include "ftxui/component/event.hpp"  // for Event, Event::Return, Event::ArrowDown, Event::ArrowLeft, Event::ArrowRight, Event::ArrowUp, Event::Backspace, Event::End, Event::Home, Event::Custom, Event::Delete, Event::F1, Event::F10, Event::F11, Event::F12, Event::F2, Event::F3, Event::F4, Event::F5, Event::F6, Event::F7, Event::F8, Event::F9, Event::PageDown, Event::PageUp, Event::Tab, Event::TabReverse, Event::Escape
-#include "ftxui/component/receiver.hpp"  // for MakeReceiver, ReceiverImpl
 #include "ftxui/component/terminal_input_parser.hpp"
 #include "gtest/gtest.h"  // for AssertionResult, Test, Message, TestPartResult, EXPECT_EQ, EXPECT_TRUE, TEST, EXPECT_FALSE
 
@@ -22,228 +22,197 @@ TEST(Event, Character) {
   for (char c = 'A'; c <= 'Z'; ++c)
     basic_char.push_back(c);
 
-  auto event_receiver = MakeReceiver<Task>();
-  {
-    auto parser = TerminalInputParser(event_receiver->MakeSender());
-    for (char c : basic_char)
-      parser.Add(c);
-  }
+  std::vector<Event> received_events;
+  auto parser = TerminalInputParser(
+      [&](Event event) { received_events.push_back(std::move(event)); });
+  for (char c : basic_char)
+    parser.Add(c);
 
-  Task received;
-  for (char c : basic_char) {
-    EXPECT_TRUE(event_receiver->Receive(&received));
-    EXPECT_TRUE(std::get<Event>(received).is_character());
-    EXPECT_EQ(c, std::get<Event>(received).character()[0]);
+  for (size_t i = 0; i < basic_char.size(); ++i) {
+    EXPECT_TRUE(received_events[i].is_character());
+    EXPECT_EQ(basic_char[i], received_events[i].character()[0]);
   }
-  EXPECT_FALSE(event_receiver->Receive(&received));
+  EXPECT_EQ(received_events.size(), basic_char.size());
 }
 
 TEST(Event, EscapeKeyWithoutWaiting) {
-  auto event_receiver = MakeReceiver<Task>();
-  {
-    auto parser = TerminalInputParser(event_receiver->MakeSender());
-    parser.Add('\x1B');
-  }
+  std::vector<Event> received_events;
+  auto parser = TerminalInputParser(
+      [&](Event event) { received_events.push_back(std::move(event)); });
+  parser.Add('');
 
-  Task received;
-  EXPECT_FALSE(event_receiver->Receive(&received));
+  EXPECT_TRUE(received_events.empty());
 }
 
 TEST(Event, EscapeKeyNotEnoughWait) {
-  auto event_receiver = MakeReceiver<Task>();
-  {
-    auto parser = TerminalInputParser(event_receiver->MakeSender());
-    parser.Add('\x1B');
-    parser.Timeout(49);
-  }
+  std::vector<Event> received_events;
+  auto parser = TerminalInputParser(
+      [&](Event event) { received_events.push_back(std::move(event)); });
+  parser.Add('');
+  parser.Timeout(49);
 
-  Task received;
-  EXPECT_FALSE(event_receiver->Receive(&received));
+  EXPECT_TRUE(received_events.empty());
 }
 
 TEST(Event, EscapeKeyEnoughWait) {
-  auto event_receiver = MakeReceiver<Task>();
-  {
-    auto parser = TerminalInputParser(event_receiver->MakeSender());
-    parser.Add('\x1B');
-    parser.Timeout(50);
-  }
+  std::vector<Event> received_events;
+  auto parser = TerminalInputParser(
+      [&](Event event) { received_events.push_back(std::move(event)); });
+  parser.Add('');
+  parser.Timeout(50);
 
-  Task received;
-  EXPECT_TRUE(event_receiver->Receive(&received));
-  EXPECT_EQ(std::get<Event>(received), Event::Escape);
-  EXPECT_FALSE(event_receiver->Receive(&received));
+  EXPECT_EQ(1, received_events.size());
+  EXPECT_EQ(received_events[0], Event::Escape);
 }
 
 TEST(Event, EscapeFast) {
-  auto event_receiver = MakeReceiver<Task>();
-  {
-    auto parser = TerminalInputParser(event_receiver->MakeSender());
-    parser.Add('\x1B');
-    parser.Add('a');
-    parser.Add('\x1B');
-    parser.Add('b');
-    parser.Timeout(49);
-  }
-  Task received;
-  EXPECT_TRUE(event_receiver->Receive(&received));
-  EXPECT_EQ(std::get<Event>(received), Event::AltA);
-  EXPECT_TRUE(event_receiver->Receive(&received));
-  EXPECT_EQ(std::get<Event>(received), Event::AltB);
-  EXPECT_FALSE(event_receiver->Receive(&received));
+  std::vector<Event> received_events;
+  auto parser = TerminalInputParser(
+      [&](Event event) { received_events.push_back(std::move(event)); });
+  parser.Add('');
+  parser.Add('a');
+  parser.Add('');
+  parser.Add('b');
+  parser.Timeout(49);
+
+  EXPECT_EQ(2, received_events.size());
+  EXPECT_EQ(received_events[0], Event::AltA);
+  EXPECT_EQ(received_events[1], Event::AltB);
 }
 
 TEST(Event, MouseLeftClickPressed) {
-  auto event_receiver = MakeReceiver<Task>();
-  {
-    auto parser = TerminalInputParser(event_receiver->MakeSender());
-    parser.Add('\x1B');
-    parser.Add('[');
-    parser.Add('0');
-    parser.Add(';');
-    parser.Add('1');
-    parser.Add('2');
-    parser.Add(';');
-    parser.Add('4');
-    parser.Add('2');
-    parser.Add('M');
-  }
+  std::vector<Event> received_events;
+  auto parser = TerminalInputParser(
+      [&](Event event) { received_events.push_back(std::move(event)); });
+  parser.Add('');
+  parser.Add('[');
+  parser.Add('0');
+  parser.Add(';');
+  parser.Add('1');
+  parser.Add('2');
+  parser.Add(';');
+  parser.Add('4');
+  parser.Add('2');
+  parser.Add('M');
 
-  Task received;
-  EXPECT_TRUE(event_receiver->Receive(&received));
-  EXPECT_TRUE(std::get<Event>(received).is_mouse());
-  EXPECT_EQ(Mouse::Left, std::get<Event>(received).mouse().button);
-  EXPECT_EQ(12, std::get<Event>(received).mouse().x);
-  EXPECT_EQ(42, std::get<Event>(received).mouse().y);
-  EXPECT_EQ(std::get<Event>(received).mouse().motion, Mouse::Pressed);
-  EXPECT_FALSE(event_receiver->Receive(&received));
+  EXPECT_EQ(1, received_events.size());
+  EXPECT_TRUE(received_events[0].is_mouse());
+  EXPECT_EQ(Mouse::Left, received_events[0].mouse().button);
+  EXPECT_EQ(12, received_events[0].mouse().x);
+  EXPECT_EQ(42, received_events[0].mouse().y);
+  EXPECT_EQ(received_events[0].mouse().motion, Mouse::Pressed);
 }
 
 TEST(Event, MouseLeftMoved) {
-  auto event_receiver = MakeReceiver<Task>();
-  {
-    auto parser = TerminalInputParser(event_receiver->MakeSender());
-    parser.Add('\x1B');
-    parser.Add('[');
-    parser.Add('3');
-    parser.Add('2');
-    parser.Add(';');
-    parser.Add('1');
-    parser.Add('2');
-    parser.Add(';');
-    parser.Add('4');
-    parser.Add('2');
-    parser.Add('M');
-  }
+  std::vector<Event> received_events;
+  auto parser = TerminalInputParser(
+      [&](Event event) { received_events.push_back(std::move(event)); });
+  parser.Add('');
+  parser.Add('[');
+  parser.Add('3');
+  parser.Add('2');
+  parser.Add(';');
+  parser.Add('1');
+  parser.Add('2');
+  parser.Add(';');
+  parser.Add('4');
+  parser.Add('2');
+  parser.Add('M');
 
-  Task received;
-  EXPECT_TRUE(event_receiver->Receive(&received));
-  EXPECT_TRUE(std::get<Event>(received).is_mouse());
-  EXPECT_EQ(Mouse::Left, std::get<Event>(received).mouse().button);
-  EXPECT_EQ(12, std::get<Event>(received).mouse().x);
-  EXPECT_EQ(42, std::get<Event>(received).mouse().y);
-  EXPECT_EQ(std::get<Event>(received).mouse().motion, Mouse::Moved);
-  EXPECT_FALSE(event_receiver->Receive(&received));
+  EXPECT_EQ(1, received_events.size());
+  EXPECT_TRUE(received_events[0].is_mouse());
+  EXPECT_EQ(Mouse::Left, received_events[0].mouse().button);
+  EXPECT_EQ(12, received_events[0].mouse().x);
+  EXPECT_EQ(42, received_events[0].mouse().y);
+  EXPECT_EQ(received_events[0].mouse().motion, Mouse::Moved);
 }
 
 TEST(Event, MouseLeftClickReleased) {
-  auto event_receiver = MakeReceiver<Task>();
-  {
-    auto parser = TerminalInputParser(event_receiver->MakeSender());
-    parser.Add('\x1B');
-    parser.Add('[');
-    parser.Add('0');
-    parser.Add(';');
-    parser.Add('1');
-    parser.Add('2');
-    parser.Add(';');
-    parser.Add('4');
-    parser.Add('2');
-    parser.Add('m');
-  }
+  std::vector<Event> received_events;
+  auto parser = TerminalInputParser(
+      [&](Event event) { received_events.push_back(std::move(event)); });
+  parser.Add('');
+  parser.Add('[');
+  parser.Add('0');
+  parser.Add(';');
+  parser.Add('1');
+  parser.Add('2');
+  parser.Add(';');
+  parser.Add('4');
+  parser.Add('2');
+  parser.Add('m');
 
-  Task received;
-  EXPECT_TRUE(event_receiver->Receive(&received));
-  EXPECT_TRUE(std::get<Event>(received).is_mouse());
-  EXPECT_EQ(Mouse::Left, std::get<Event>(received).mouse().button);
-  EXPECT_EQ(12, std::get<Event>(received).mouse().x);
-  EXPECT_EQ(42, std::get<Event>(received).mouse().y);
-  EXPECT_EQ(std::get<Event>(received).mouse().motion, Mouse::Released);
-  EXPECT_FALSE(event_receiver->Receive(&received));
+  EXPECT_EQ(1, received_events.size());
+  EXPECT_TRUE(received_events[0].is_mouse());
+  EXPECT_EQ(Mouse::Left, received_events[0].mouse().button);
+  EXPECT_EQ(12, received_events[0].mouse().x);
+  EXPECT_EQ(42, received_events[0].mouse().y);
+  EXPECT_EQ(received_events[0].mouse().motion, Mouse::Released);
 }
 
 TEST(Event, MouseReporting) {
-  auto event_receiver = MakeReceiver<Task>();
-  {
-    auto parser = TerminalInputParser(event_receiver->MakeSender());
-    parser.Add('\x1B');
-    parser.Add('[');
-    parser.Add('1');
-    parser.Add('2');
-    parser.Add(';');
-    parser.Add('4');
-    parser.Add('2');
-    parser.Add('R');
-  }
+  std::vector<Event> received_events;
+  auto parser = TerminalInputParser(
+      [&](Event event) { received_events.push_back(std::move(event)); });
+  parser.Add('');
+  parser.Add('[');
+  parser.Add('1');
+  parser.Add('2');
+  parser.Add(';');
+  parser.Add('4');
+  parser.Add('2');
+  parser.Add('R');
 
-  Task received;
-  EXPECT_TRUE(event_receiver->Receive(&received));
-  EXPECT_TRUE(std::get<Event>(received).is_cursor_position());
-  EXPECT_EQ(42, std::get<Event>(received).cursor_x());
-  EXPECT_EQ(12, std::get<Event>(received).cursor_y());
-  EXPECT_FALSE(event_receiver->Receive(&received));
+  EXPECT_EQ(1, received_events.size());
+  EXPECT_TRUE(received_events[0].is_cursor_position());
+  EXPECT_EQ(42, received_events[0].cursor_x());
+  EXPECT_EQ(12, received_events[0].cursor_y());
 }
 
 TEST(Event, MouseMiddleClick) {
-  auto event_receiver = MakeReceiver<Task>();
-  {
-    auto parser = TerminalInputParser(event_receiver->MakeSender());
-    parser.Add('\x1B');
-    parser.Add('[');
-    parser.Add('3');
-    parser.Add('3');
-    parser.Add(';');
-    parser.Add('1');
-    parser.Add('2');
-    parser.Add(';');
-    parser.Add('4');
-    parser.Add('2');
-    parser.Add('M');
-  }
+  std::vector<Event> received_events;
+  auto parser = TerminalInputParser(
+      [&](Event event) { received_events.push_back(std::move(event)); });
+  parser.Add('');
+  parser.Add('[');
+  parser.Add('3');
+  parser.Add('3');
+  parser.Add(';');
+  parser.Add('1');
+  parser.Add('2');
+  parser.Add(';');
+  parser.Add('4');
+  parser.Add('2');
+  parser.Add('M');
 
-  Task received;
-  EXPECT_TRUE(event_receiver->Receive(&received));
-  EXPECT_TRUE(std::get<Event>(received).is_mouse());
-  EXPECT_EQ(Mouse::Middle, std::get<Event>(received).mouse().button);
-  EXPECT_EQ(12, std::get<Event>(received).mouse().x);
-  EXPECT_EQ(42, std::get<Event>(received).mouse().y);
-  EXPECT_FALSE(event_receiver->Receive(&received));
+  EXPECT_EQ(1, received_events.size());
+  EXPECT_TRUE(received_events[0].is_mouse());
+  EXPECT_EQ(Mouse::Middle, received_events[0].mouse().button);
+  EXPECT_EQ(12, received_events[0].mouse().x);
+  EXPECT_EQ(42, received_events[0].mouse().y);
 }
 
 TEST(Event, MouseRightClick) {
-  auto event_receiver = MakeReceiver<Task>();
-  {
-    auto parser = TerminalInputParser(event_receiver->MakeSender());
-    parser.Add('\x1B');
-    parser.Add('[');
-    parser.Add('3');
-    parser.Add('4');
-    parser.Add(';');
-    parser.Add('1');
-    parser.Add('2');
-    parser.Add(';');
-    parser.Add('4');
-    parser.Add('2');
-    parser.Add('M');
-  }
+  std::vector<Event> received_events;
+  auto parser = TerminalInputParser(
+      [&](Event event) { received_events.push_back(std::move(event)); });
+  parser.Add('');
+  parser.Add('[');
+  parser.Add('3');
+  parser.Add('4');
+  parser.Add(';');
+  parser.Add('1');
+  parser.Add('2');
+  parser.Add(';');
+  parser.Add('4');
+  parser.Add('2');
+  parser.Add('M');
 
-  Task received;
-  EXPECT_TRUE(event_receiver->Receive(&received));
-  EXPECT_TRUE(std::get<Event>(received).is_mouse());
-  EXPECT_EQ(Mouse::Right, std::get<Event>(received).mouse().button);
-  EXPECT_EQ(12, std::get<Event>(received).mouse().x);
-  EXPECT_EQ(42, std::get<Event>(received).mouse().y);
-  EXPECT_FALSE(event_receiver->Receive(&received));
+  EXPECT_EQ(1, received_events.size());
+  EXPECT_TRUE(received_events[0].is_mouse());
+  EXPECT_EQ(Mouse::Right, received_events[0].mouse().button);
+  EXPECT_EQ(12, received_events[0].mouse().x);
+  EXPECT_EQ(42, received_events[0].mouse().y);
 }
 
 TEST(Event, UTF8) {
@@ -313,31 +282,29 @@ TEST(Event, UTF8) {
 
   };
   for (auto test : kTestCase) {
-    auto event_receiver = MakeReceiver<Task>();
-    {
-      auto parser = TerminalInputParser(event_receiver->MakeSender());
-      for (auto input : test.input)
-        parser.Add(input);
-    }
-    Task received;
+    std::vector<Event> received_events;
+    auto parser = TerminalInputParser(
+        [&](Event event) { received_events.push_back(std::move(event)); });
+    for (auto input : test.input)
+      parser.Add(input);
+
     if (test.valid) {
-      EXPECT_TRUE(event_receiver->Receive(&received));
-      EXPECT_TRUE(std::get<Event>(received).is_character());
+      EXPECT_EQ(1, received_events.size());
+      EXPECT_TRUE(received_events[0].is_character());
+    } else {
+      EXPECT_TRUE(received_events.empty());
     }
-    EXPECT_FALSE(event_receiver->Receive(&received));
   }
 }
 
 TEST(Event, NewLine) {
   for (char newline : {'\r', '\n'}) {
-    auto event_receiver = MakeReceiver<Task>();
-    {
-      auto parser = TerminalInputParser(event_receiver->MakeSender());
-      parser.Add(newline);
-    }
-    Task received;
-    EXPECT_TRUE(event_receiver->Receive(&received));
-    EXPECT_TRUE(std::get<Event>(received) == Event::Return);
+    std::vector<Event> received_events;
+    auto parser = TerminalInputParser(
+        [&](Event event) { received_events.push_back(std::move(event)); });
+    parser.Add(newline);
+    EXPECT_EQ(1, received_events.size());
+    EXPECT_TRUE(received_events[0] == Event::Return);
   }
 }
 
@@ -357,17 +324,16 @@ TEST(Event, Control) {
   cases.push_back({char(127), false});
 
   for (auto test : cases) {
-    auto event_receiver = MakeReceiver<Task>();
-    {
-      auto parser = TerminalInputParser(event_receiver->MakeSender());
-      parser.Add(test.input);
-    }
-    Task received;
+    std::vector<Event> received_events;
+    auto parser = TerminalInputParser(
+        [&](Event event) { received_events.push_back(std::move(event)); });
+    parser.Add(test.input);
+
     if (test.cancel) {
-      EXPECT_FALSE(event_receiver->Receive(&received));
+      EXPECT_TRUE(received_events.empty());
     } else {
-      EXPECT_TRUE(event_receiver->Receive(&received));
-      EXPECT_EQ(std::get<Event>(received), Event::Special({test.input}));
+      EXPECT_EQ(1, received_events.size());
+      EXPECT_EQ(received_events[0], Event::Special({test.input}));
     }
   }
 }
@@ -385,10 +351,9 @@ TEST(Event, Special) {
     Event expected;
   } kTestCase[] = {
       // Arrow (default cursor mode)
-      {str("\x1B[A"), Event::ArrowUp},    {str("\x1B[B"), Event::ArrowDown},
-      {str("\x1B[C"), Event::ArrowRight}, {str("\x1B[D"), Event::ArrowLeft},
-      {str("\x1B[H"), Event::Home},       {str("\x1B[F"), Event::End},
-      /*
+      {str(""), Event::ArrowUp},    {str(""), Event::ArrowDown},
+      {str(""), Event::ArrowRight}, {str(""), Event::ArrowLeft},
+      {str(""), Event::Home},       {str(""), Event::End},
 
       // Arrow (application cursor mode)
       {str("\x1BOA"), Event::ArrowUp},
@@ -469,67 +434,38 @@ TEST(Event, Special) {
 
       // Custom:
       {{0}, Event::Custom},
-      */
   };
 
   for (auto test : kTestCase) {
-    auto event_receiver = MakeReceiver<Task>();
-    {
-      auto parser = TerminalInputParser(event_receiver->MakeSender());
-      for (auto input : test.input) {
-        parser.Add(input);
-      }
+    std::vector<Event> received_events;
+    auto parser = TerminalInputParser(
+        [&](Event event) { received_events.push_back(std::move(event)); });
+    for (auto input : test.input) {
+      parser.Add(input);
     }
-    Task received;
-    EXPECT_TRUE(event_receiver->Receive(&received));
-    EXPECT_EQ(std::get<Event>(received), test.expected);
-    EXPECT_FALSE(event_receiver->Receive(&received));
+    EXPECT_EQ(1, received_events.size());
+    EXPECT_EQ(received_events[0], test.expected);
   }
 }
 
 TEST(Event, DeviceControlString) {
-  auto event_receiver = MakeReceiver<Task>();
-  {
-    auto parser = TerminalInputParser(event_receiver->MakeSender());
-    parser.Add(27);   // ESC
-    parser.Add(80);   // P
-    parser.Add(49);   // 1
-    parser.Add(36);   // $
-    parser.Add(114);  // r
-    parser.Add(49);   // 1
-    parser.Add(32);   // SP
-    parser.Add(113);  // q
-    parser.Add(27);   // ESC
-    parser.Add(92);   // (backslash)
-  }
+  std::vector<Event> received_events;
+  auto parser = TerminalInputParser(
+      [&](Event event) { received_events.push_back(std::move(event)); });
+  parser.Add(27);   // ESC
+  parser.Add(80);   // P
+  parser.Add(49);   // 1
+  parser.Add(36);   // $
+  parser.Add(114);  // r
+  parser.Add(49);   // 1
+  parser.Add(32);   // SP
+  parser.Add(113);  // q
+  parser.Add(27);   // ESC
+  parser.Add(92);   // (backslash)
 
-  Task received;
-  EXPECT_TRUE(event_receiver->Receive(&received));
-  EXPECT_TRUE(std::get<Event>(received).is_cursor_shape());
-  EXPECT_EQ(1, std::get<Event>(received).cursor_shape());
-  EXPECT_FALSE(event_receiver->Receive(&received));
-}
-
-TEST(Event, TerminalID) {
-  // Test terminal id for KDE konsole
-  auto event_receiver = MakeReceiver<Task>();
-  {
-    auto parser = TerminalInputParser(event_receiver->MakeSender());
-    parser.Add('\x1B');
-    parser.Add('[');
-    parser.Add('?');
-    parser.Add('6');
-    parser.Add('2');
-    parser.Add(';');
-    parser.Add('2');
-    parser.Add('c');
-  }
-
-  Task received;
-  EXPECT_TRUE(event_receiver->Receive(&received));
-  EXPECT_TRUE(std::get<Event>(received).is_terminal_id());
-  EXPECT_EQ(TerminalID::Konsole, std::get<Event>(received).terminal_id());
-  EXPECT_FALSE(event_receiver->Receive(&received));
+  EXPECT_EQ(1, received_events.size());
+  EXPECT_TRUE(received_events[0].is_cursor_shape());
+  EXPECT_EQ(1, received_events[0].cursor_shape());
 }
 
 }  // namespace ftxui

src/ftxui/component/terminal_input_parser_test_fuzzer.cpp

@@ -1,21 +1,16 @@
 // Copyright 2021 Arthur Sonzogni. All rights reserved.
 // Use of this source code is governed by the MIT license that can be found in
 // the LICENSE file.
+#include <cstddef>
+#include <ftxui/component/event.hpp>
 #include "ftxui/component/terminal_input_parser.hpp"
 
 extern "C" int LLVMFuzzerTestOneInput(const char* data, size_t size) {
   using namespace ftxui;
-  auto event_receiver = MakeReceiver<Task>();
-  {
-    auto parser = TerminalInputParser(event_receiver->MakeSender());
-    for (size_t i = 0; i < size; ++i) {
-      parser.Add(data[i]);
-    }
+  auto parser = TerminalInputParser([&](Event) {});
+  for (size_t i = 0; i < size; ++i) {
+    parser.Add(data[i]);
   }
 
-  Task received;
-  while (event_receiver->Receive(&received)) {
-    // Do nothing.
-  }
   return 0;  // Non-zero return values are reserved for future use.
 }