Fix CMake 3.12 compatibility by adding required install destinations

Co-authored-by: ArthurSonzogni <4759106+ArthurSonzogni@users.noreply.github.com>

.bazelrc

@@ -1,3 +1,5 @@
+common --enable_bzlmod
+
 build --features=layering_check
 build --enable_bzlmod
 

.clang-format

@@ -2,3 +2,6 @@
 # http://clang.llvm.org/docs/ClangFormatStyleOptions.html
 BasedOnStyle: Chromium
 Standard: Cpp11
+
+InsertBraces: true
+InsertNewlineAtEOF: true

BUILD.bazel

@@ -13,7 +13,6 @@ load("@rules_cc//cc:defs.bzl", "cc_binary", "cc_library", "cc_test")
 load(":bazel/ftxui.bzl", "ftxui_cc_library")
 load(":bazel/ftxui.bzl", "generate_examples")
 load(":bazel/ftxui.bzl", "windows_copts")
-load(":bazel/ftxui.bzl", "pthread_linkopts")
 
 # A meta target depending on all of the ftxui submodules.
 # Note that component depends on dom and screen, so ftxui is just an alias for 
@@ -159,6 +158,12 @@ ftxui_cc_library(
         "src/ftxui/component/resizable_split.cpp",
         "src/ftxui/component/screen_interactive.cpp",
         "src/ftxui/component/slider.cpp",
+        "src/ftxui/component/task.cpp",
+        "src/ftxui/component/task_internal.hpp",
+        "src/ftxui/component/task_queue.cpp",
+        "src/ftxui/component/task_queue.hpp",
+        "src/ftxui/component/task_runner.cpp",
+        "src/ftxui/component/task_runner.hpp",
         "src/ftxui/component/terminal_input_parser.cpp",
         "src/ftxui/component/terminal_input_parser.hpp",
         "src/ftxui/component/util.cpp",
@@ -170,6 +175,9 @@ ftxui_cc_library(
         # Private header from ftxui:screen.
         "src/ftxui/screen/string_internal.hpp",
         "src/ftxui/screen/util.hpp",
+
+        # Private header.
+        "include/ftxui/util/warn_windows_macro.hpp",
     ],
     hdrs = [
         "include/ftxui/component/animation.hpp",
@@ -184,7 +192,6 @@ ftxui_cc_library(
         "include/ftxui/component/screen_interactive.hpp",
         "include/ftxui/component/task.hpp",
     ],
-    linkopts = pthread_linkopts(),
     deps = [
         ":dom",
         ":screen",
@@ -207,7 +214,6 @@ cc_test(
         "src/ftxui/component/menu_test.cpp",
         "src/ftxui/component/modal_test.cpp",
         "src/ftxui/component/radiobox_test.cpp",
-        "src/ftxui/component/receiver_test.cpp",
         "src/ftxui/component/resizable_split_test.cpp",
         "src/ftxui/component/slider_test.cpp",
         "src/ftxui/component/terminal_input_parser_test.cpp",

CHANGELOG.md

@@ -24,6 +24,13 @@ Next
   import ftxui.util;
   ```
   Thanks @mikomikotaishi for PR #1015.
+- Remove dependency on 'pthread'.
+
+### Component
+- Fix ScreenInteractive::FixedSize screen stomps on the preceding terminal
+  output. Thanks @zozowell in #1064.
+- Fix vertical `ftxui::Slider`. The "up" key was previously decreasing the
+  value. Thanks @its-pablo in #1093 for reporting the issue.
 
 
 6.1.9 (2025-05-07)

CMakeLists.txt

@@ -144,26 +144,20 @@ add_library(component
   src/ftxui/component/resizable_split.cpp
   src/ftxui/component/screen_interactive.cpp
   src/ftxui/component/slider.cpp
+  src/ftxui/component/task.cpp
+  src/ftxui/component/task_internal.hpp
+  src/ftxui/component/task_queue.cpp
+  src/ftxui/component/task_queue.hpp
+  src/ftxui/component/task_runner.cpp
+  src/ftxui/component/task_runner.hpp
   src/ftxui/component/terminal_input_parser.cpp
   src/ftxui/component/terminal_input_parser.hpp
   src/ftxui/component/util.cpp
   src/ftxui/component/window.cpp
 )
 
-target_link_libraries(dom
+target_link_libraries(dom PUBLIC screen)
-  PUBLIC screen
+target_link_libraries(component PUBLIC dom)
-)
-
-target_link_libraries(component
-  PUBLIC dom
-)
-
-if (NOT EMSCRIPTEN)
-  find_package(Threads)
-  target_link_libraries(component
-    PUBLIC Threads::Threads
-  )
-endif()
 
 include(cmake/ftxui_set_options.cmake)
 ftxui_set_options(screen)
@@ -184,8 +178,8 @@ include(cmake/ftxui_install.cmake)
 include(cmake/ftxui_package.cmake)
 include(cmake/ftxui_modules.cmake)
 
-add_subdirectory(doc)
 add_subdirectory(examples)
+add_subdirectory(doc)
 
 # You can generate ./examples_modules/ by running
 # ./tools/generate_examples_modules.sh

README.md

@@ -1,3 +1,4 @@
+
 <p align="center">
   <img src="https://github.com/ArthurSonzogni/FTXUI/assets/4759106/6925b6da-0a7e-49d9-883c-c890e1f36007" alt="Demo image"></img>
   <br/>
@@ -18,7 +19,7 @@
   <br/>
   <a href="https://arthursonzogni.github.io/FTXUI/">Documentation</a> ·
   <a href="https://github.com/ArthurSonzogni/FTXUI/issues">Report a Bug</a> ·
-  <a href="https://arthursonzogni.github.io/FTXUI/examples.html">Examples</a> .
+  <a href="https://arthursonzogni.github.io/FTXUI/examples/">Examples</a> .
   <a href="https://github.com/ArthurSonzogni/FTXUI/issues">Request Feature</a> ·
   <a href="https://github.com/ArthurSonzogni/FTXUI/pulls">Send a Pull Request</a>
 
@@ -362,6 +363,8 @@ Feel free to add your projects here:
 - [FTB - tertminal file browser](https://github.com/Cyxuan0311/FTB)
 - [openJuice](https://github.com/mikomikotaishi/openJuice)
 - [SHOOT!](https://github.com/ShingZhanho/ENGG1340-Project-25Spring)
+- [VerifySN (Fast Hash Tool)](https://github.com/d06i/verifySN)
+- [tic-tac-toe](https://github.com/birland/tic-tac-toe)
 
 ### [cpp-best-practices/game_jam](https://github.com/cpp-best-practices/game_jam)
 

bazel/ftxui.bzl

@@ -43,16 +43,6 @@ def windows_copts():
         "//conditions:default": [],
     })
 
-def pthread_linkopts():
-    return select({
-        # With MSVC, threading is already built-in (you don't need -pthread.
-        "@rules_cc//cc/compiler:msvc-cl": [],
-        "@rules_cc//cc/compiler:clang-cl": [],
-        "@rules_cc//cc/compiler:clang": ["-pthread"],
-        "@rules_cc//cc/compiler:gcc": ["-pthread"],
-        "//conditions:default": ["-pthread"],
-    })
-
 def ftxui_cc_library(
         name,
         srcs = [],

build/_deps/googlebenchmark-subbuild/CMakeLists.txt

@@ -0,0 +1,42 @@
+# Distributed under the OSI-approved BSD 3-Clause License.  See accompanying
+# file Copyright.txt or https://cmake.org/licensing for details.
+
+cmake_minimum_required(VERSION 3.31.6)
+
+# Reject any attempt to use a toolchain file. We must not use one because
+# we could be downloading it here. If the CMAKE_TOOLCHAIN_FILE environment
+# variable is set, the cache variable will have been initialized from it.
+unset(CMAKE_TOOLCHAIN_FILE CACHE)
+unset(ENV{CMAKE_TOOLCHAIN_FILE})
+
+# We name the project and the target for the ExternalProject_Add() call
+# to something that will highlight to the user what we are working on if
+# something goes wrong and an error message is produced.
+
+project(googlebenchmark-populate NONE)
+
+
+# Pass through things we've already detected in the main project to avoid
+# paying the cost of redetecting them again in ExternalProject_Add()
+set(GIT_EXECUTABLE [==[/usr/bin/git]==])
+set(GIT_VERSION_STRING [==[2.51.0]==])
+set_property(GLOBAL PROPERTY _CMAKE_FindGit_GIT_EXECUTABLE_VERSION
+  [==[/usr/bin/git;2.51.0]==]
+)
+
+
+include(ExternalProject)
+ExternalProject_Add(googlebenchmark-populate
+                     "UPDATE_DISCONNECTED" "False" "GIT_REPOSITORY" "https://github.com/google/benchmark" "EXTERNALPROJECT_INTERNAL_ARGUMENT_SEPARATOR" "GIT_TAG" "015d1a091af6937488242b70121858bce8fd40e9" "GIT_PROGRESS" "TRUE"
+                    SOURCE_DIR          "/home/runner/work/FTXUI/FTXUI/build/_deps/googlebenchmark-src"
+                    BINARY_DIR          "/home/runner/work/FTXUI/FTXUI/build/_deps/googlebenchmark-build"
+                    CONFIGURE_COMMAND   ""
+                    BUILD_COMMAND       ""
+                    INSTALL_COMMAND     ""
+                    TEST_COMMAND        ""
+                    USES_TERMINAL_DOWNLOAD  YES
+                    USES_TERMINAL_UPDATE    YES
+                    USES_TERMINAL_PATCH     YES
+)
+
+

build/_deps/googletest-subbuild/CMakeLists.txt

@@ -0,0 +1,42 @@
+# Distributed under the OSI-approved BSD 3-Clause License.  See accompanying
+# file Copyright.txt or https://cmake.org/licensing for details.
+
+cmake_minimum_required(VERSION 3.31.6)
+
+# Reject any attempt to use a toolchain file. We must not use one because
+# we could be downloading it here. If the CMAKE_TOOLCHAIN_FILE environment
+# variable is set, the cache variable will have been initialized from it.
+unset(CMAKE_TOOLCHAIN_FILE CACHE)
+unset(ENV{CMAKE_TOOLCHAIN_FILE})
+
+# We name the project and the target for the ExternalProject_Add() call
+# to something that will highlight to the user what we are working on if
+# something goes wrong and an error message is produced.
+
+project(googletest-populate NONE)
+
+
+# Pass through things we've already detected in the main project to avoid
+# paying the cost of redetecting them again in ExternalProject_Add()
+set(GIT_EXECUTABLE [==[/usr/bin/git]==])
+set(GIT_VERSION_STRING [==[2.51.0]==])
+set_property(GLOBAL PROPERTY _CMAKE_FindGit_GIT_EXECUTABLE_VERSION
+  [==[/usr/bin/git;2.51.0]==]
+)
+
+
+include(ExternalProject)
+ExternalProject_Add(googletest-populate
+                     "UPDATE_DISCONNECTED" "False" "GIT_REPOSITORY" "https://github.com/google/googletest" "EXTERNALPROJECT_INTERNAL_ARGUMENT_SEPARATOR" "GIT_TAG" "23ef29555ef4789f555f1ba8c51b4c52975f0907" "GIT_PROGRESS" "TRUE"
+                    SOURCE_DIR          "/home/runner/work/FTXUI/FTXUI/build/_deps/googletest-src"
+                    BINARY_DIR          "/home/runner/work/FTXUI/FTXUI/build/_deps/googletest-build"
+                    CONFIGURE_COMMAND   ""
+                    BUILD_COMMAND       ""
+                    INSTALL_COMMAND     ""
+                    TEST_COMMAND        ""
+                    USES_TERMINAL_DOWNLOAD  YES
+                    USES_TERMINAL_UPDATE    YES
+                    USES_TERMINAL_PATCH     YES
+)
+
+

cmake/ftxui_install.cmake

@@ -11,6 +11,9 @@ include(CMakePackageConfigHelpers)
 install(
   TARGETS screen dom component
   EXPORT ftxui-targets
+  ARCHIVE DESTINATION "${CMAKE_INSTALL_LIBDIR}"
+  LIBRARY DESTINATION "${CMAKE_INSTALL_LIBDIR}"
+  RUNTIME DESTINATION "${CMAKE_INSTALL_BINDIR}"
   )
 
 install(

cmake/ftxui_modules.cmake

@@ -6,6 +6,7 @@ add_library(ftxui-modules)
 
 target_sources(ftxui-modules
   PUBLIC FILE_SET CXX_MODULES FILES
+  src/ftxui/ftxui.cppm
   src/ftxui/component.cppm
   src/ftxui/component/animation.cppm
   src/ftxui/component/captured_mouse.cppm

cmake/ftxui_set_options.cmake

@@ -101,6 +101,5 @@ endfunction()
 
 if (EMSCRIPTEN)
   string(APPEND CMAKE_CXX_FLAGS " -s USE_PTHREADS")
-  string(APPEND CMAKE_EXE_LINKER_FLAGS " -s ASYNCIFY")
   string(APPEND CMAKE_EXE_LINKER_FLAGS " -s PROXY_TO_PTHREAD")
 endif()

cmake/ftxui_test.cmake

@@ -19,11 +19,10 @@ add_executable(ftxui-tests
   src/ftxui/component/menu_test.cpp
   src/ftxui/component/modal_test.cpp
   src/ftxui/component/radiobox_test.cpp
-  src/ftxui/util/ref_test.cpp
-  src/ftxui/component/receiver_test.cpp
   src/ftxui/component/resizable_split_test.cpp
   src/ftxui/component/screen_interactive_test.cpp
   src/ftxui/component/slider_test.cpp
+  src/ftxui/component/task_test.cpp
   src/ftxui/component/terminal_input_parser_test.cpp
   src/ftxui/component/toggle_test.cpp
   src/ftxui/dom/blink_test.cpp
@@ -51,6 +50,7 @@ add_executable(ftxui-tests
   src/ftxui/dom/vbox_test.cpp
   src/ftxui/screen/color_test.cpp
   src/ftxui/screen/string_test.cpp
+  src/ftxui/util/ref_test.cpp
 )
 
 target_link_libraries(ftxui-tests

doc/cpp20-modules.md

@@ -12,8 +12,24 @@ FTXUI experimentally supports
 compilation times and improve code organization. Each header has a
 corresponding module.
 
-**Example with CMake and Ninja**
+Use the FTXUI_BUILD_MODULES option to build the FTXUI project itself to provide C++ 20 modules,
+for example with CMake and Ninja:
 
+```sh
+cmake \
+    -DCMAKE_GENERATOR=Ninja \
+    -DFTXUI_BUILD_MODULES=ON \
+    ..
+
+ninja
+```
+
+> [!NOTE]
+> To use modules, you need a C++20 compatible compiler, CMake version 3.20 or
+> higher, and use a compatible generator like Ninja. Note that Makefile
+> generators **do not support modules**.
+
+Then, in your own code you can consume the modules and code as normal:
 
 ```cpp
 import ftxui;
@@ -26,18 +42,25 @@ int main() {
 }
 ```
 
-```sh
+Note, the `ftxui` convenience module which simply pulls together all the modules:
-cmake \
-    -DCMAKE_GENERATOR=Ninja \
-    -DFTXUI_BUILD_MODULES=ON \
-    ..
 
-ninja
+```cpp
+export import ftxui.component;
+export import ftxui.dom;
+export import ftxui.screen;
+export import ftxui.util;
+```
+You can instead import only the module(s) you need if desired.
+
+To properly find and link the modules with CMake, use `target_link_libraries` to get the right
+compiler, linker, etc. flags.
+
+```cmake
+target_link_libraries(my_executable
+    #...whatever...
+    PRIVATE ftxui::modules
+)
 ```
-> [!NOTE]
-> To use modules, you need a C++20 compatible compiler, CMake version 3.20 or
-> higher, and use a compatible generator like Ninja. Note that Makefile
-> generators **do not support modules**.
 
 ### Module list
 

doc/installation_conan.md

@@ -1,19 +1,99 @@
 @page installation_conan Conan
+@tableofcontents
 
-Unofficial recipe for FTXUI exists on Conan Center:
+FTXUI can be easily obtained and integrated into your project using the Conan package manager.
-<https://conan.io/center/recipes/ftxui>
+
+## Prerequisites
+
+First, ensure that Conan is installed on your system. If not, you can install it via pip:
+
+```powershell
+pip install conan
+```
+Conan often works in tandem with CMake, so you will need to have CMake installed as well. Once you have confirmed both Conan and CMake are installed, create a project directory, for example, `ftxui-demo`:
+
+```powershell
+mkdir C:\ftxui-demo
+cd C:\ftxui-demo
+```
+
+## Configuration
+
+After ensuring your environment is set up correctly, create a Conan configuration file `conanfile.txt`. This file is used to declare your project's dependencies. The community-maintained package for FTXUI can be found on [Conan Center](https://conan.io/center/recipes/ftxui).
 
 > [!note]
-> This is an unofficial recipe. That means it is not maintained by the FTXUI
+> This is an unofficial build script. This means it is not maintained by the FTXUI
-> team, but by the community. The package maintainers seems to actively update
+> team but by the community. The package maintainer appears to actively update it
-> the package to the latest version. Thanks to the maintainers for their work!
+> to the latest releases. Many thanks to the maintainer for their work!
 
+@todo If you are familiar with the process, please consider adding an "official" build script to Conan Center.
+This could be a GitHub Action that automatically updates Conan Center upon new releases.
 
-@todo Add instructions on how to use the conan recipe.
+```ini
+[requires]
+ftxui/6.0.2
 
-@todo Please consider adding an "official" recipe to Conan Center if know how.
+[generators]
-It could be a github action that will automatically update the conan center
+CMakeDeps
-when a new release is made.
+CMakeToolchain
+
+[layout]
+cmake_layout
+```
+
+## Install Dependencies and Build
+
+Once configured, run the following command to install FTXUI and its dependencies:
+
+```powershell
+conan install . --output-folder=build --build=missing
+```
+
+This will download and install `ftxui/6.0.2` along with all its dependencies from Conan's remote repositories.
+
+After the installation completes, you can test it by creating a `demo.cpp` file in your project directory:
+
+```cpp
+#include <ftxui/screen/screen.hpp>
+#include <ftxui/dom/elements.hpp>
+#include <iostream>
+
+int main() {
+    using namespace ftxui;
+    auto document = hbox({
+        text(" Hello "),
+        text("FTXUI ") | bold | color(Color::Red),
+        text(" world! ")
+    });
+    auto screen = Screen::Create(Dimension::Full(), Dimension::Fit(document));
+    Render(screen, document);
+    std::cout << screen.ToString() << std::endl;
+    return 0;
+}
+```
+
+If the test is successful, you can then create a `CMakeLists.txt` file in the project directory:
+
+```cmake
+cmake_minimum_required(VERSION 3.20)
+project(ftxui-demo)
+
+# Set the C++ standard
+set(CMAKE_CXX_STANDARD 20)
+
+# Find the FTXUI package installed via Conan
+find_package(ftxui CONFIG REQUIRED)
+
+# Create the executable
+add_executable(demo demo.cpp)
+
+# Link the executable to the FTXUI library
+target_link_libraries(demo PRIVATE ftxui::component)
+```
+
+@todo 考虑到中国多数地区使用Conan很有可能遇到各种网络问题，我想做一个定制的版本说明，但是我对conan的了解有限再加上没有找到合适的资料，因此这个计划短暂的被搁置了，如果您知道方法，欢迎在[中文版本](xiaoditx.girhub.io/public/docs/ftxui%E4%B8%AD%E6%96%87%E7%BF%BB%E8%AF%91/installation/conan/)的下方留下评论以提醒我
+
+---
 
 <div class="section_buttons">
 

examples/CMakeLists.txt

@@ -15,16 +15,14 @@ add_subdirectory(component)
 add_subdirectory(dom)
 
 if (EMSCRIPTEN)
-  string(APPEND CMAKE_EXE_LINKER_FLAGS " -s ALLOW_MEMORY_GROWTH=1")
-  target_link_options(component PUBLIC "SHELL: -s ALLOW_MEMORY_GROWTH=1")
-
   get_property(EXAMPLES GLOBAL PROPERTY FTXUI::EXAMPLES)
   foreach(file
+      "index.css"
       "index.html"
       "index.mjs"
-      "index.css"
+      "run_webassembly.py"
       "sw.js"
-      "run_webassembly.py")
+  )
     configure_file(${file} ${file})
   endforeach(file)
 endif()

examples/component/button.cpp

@@ -1,9 +1,64 @@
-#include "ftxui/component/component.hpp"
+// Copyright 2020 Arthur Sonzogni. All rights reserved.
-#include "ftxui/component/screen_interactive.hpp"
+// 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(){
+#include "ftxui/component/captured_mouse.hpp"  // for ftxui
-    auto screen = ftxui::ScreenInteractive::Fullscreen();
+#include "ftxui/component/component.hpp"  // for Button, Horizontal, Renderer
-    auto testComponent = ftxui::Renderer([](){return ftxui::text("test Component");});
+#include "ftxui/component/component_base.hpp"      // for ComponentBase
-    screen.Loop(testComponent);
+#include "ftxui/component/screen_interactive.hpp"  // for ScreenInteractive
-    return 0;
+#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/canvas_animated.cpp

@@ -133,8 +133,9 @@ int main() {
       float dy = 50.f;
       ys[x] = int(dy + 20 * cos(dx * 0.14) + 10 * sin(dx * 0.42));
     }
-    for (int x = 1; x < 99; x++)
+    for (int x = 1; x < 99; x++) {
       c.DrawPointLine(x, ys[x], x + 1, ys[x + 1]);
+    }
 
     return canvas(std::move(c));
   });

examples/component/flexbox_gallery.cpp

@@ -82,10 +82,12 @@ int main() {
                    size(WIDTH, EQUAL, dimx) | size(HEIGHT, EQUAL, dimy) |
                    bgcolor(Color::HSV(index * 25, 255, 255)) |
                    color(Color::Black);
-    if (element_xflex_grow)
+    if (element_xflex_grow) {
       element = element | xflex_grow;
-    if (element_yflex_grow)
+    }
+    if (element_yflex_grow) {
       element = element | yflex_grow;
+    }
     return element;
   };
 
@@ -119,10 +121,12 @@ int main() {
 
     group = group | notflex;
 
-    if (!group_xflex_grow)
+    if (!group_xflex_grow) {
       group = hbox(group, filler());
-    if (!group_yflex_grow)
+    }
+    if (!group_yflex_grow) {
       group = vbox(group, filler());
+    }
 
     group = group | flex;
     return group;

examples/component/homescreen.cpp

@@ -1,11 +1,12 @@
 // 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 <stddef.h>    // for size_t
+#include <stddef.h>  // for size_t
-#include <array>       // for array
+#include <array>     // for array
-#include <atomic>      // for atomic
+#include <atomic>    // for atomic
-#include <chrono>      // for operator""s, chrono_literals
+#include <chrono>    // for operator""s, chrono_literals
-#include <cmath>       // for sin
+#include <cmath>     // for sin
+#include <ftxui/component/loop.hpp>
 #include <functional>  // for ref, reference_wrapper, function
 #include <memory>      // for allocator, shared_ptr, __shared_ptr_access
 #include <string>  // for string, basic_string, char_traits, operator+, to_string
@@ -269,7 +270,7 @@ int main() {
   auto spinner_tab_renderer = Renderer([&] {
     Elements entries;
     for (int i = 0; i < 22; ++i) {
-      entries.push_back(spinner(i, shift / 2) | bold |
+      entries.push_back(spinner(i, shift / 5) | bold |
                         size(WIDTH, GREATER_THAN, 2) | border);
     }
     return hflow(std::move(entries));
@@ -512,24 +513,20 @@ int main() {
     });
   });
 
-  std::atomic<bool> refresh_ui_continue = true;
+  Loop loop(&screen, main_renderer);
-  std::thread refresh_ui([&] {
+  while (!loop.HasQuitted()) {
-    while (refresh_ui_continue) {
+    // Update the state of the application.
-      using namespace std::chrono_literals;
+    shift++;
-      std::this_thread::sleep_for(0.05s);
-      // The |shift| variable belong to the main thread. `screen.Post(task)`
-      // will execute the update on the thread where |screen| lives (e.g. the
-      // main thread). Using `screen.Post(task)` is threadsafe.
-      screen.Post([&] { shift++; });
-      // After updating the state, request a new frame to be drawn. This is done
-      // by simulating a new "custom" event to be handled.
-      screen.Post(Event::Custom);
-    }
-  });
 
-  screen.Loop(main_renderer);
+    // Request a new frame to be drawn.
-  refresh_ui_continue = false;
+    screen.RequestAnimationFrame();
-  refresh_ui.join();
+
+    // Execute events, and draw the next frame.
+    loop.RunOnce();
+
+    // Sleep for a short duration to control the frame rate (60 FPS).
+    std::this_thread::sleep_for(std::chrono::milliseconds(1000 / 60));
+  }
 
   return 0;
 }

examples/component/menu_entries.cpp

@@ -22,10 +22,12 @@ MenuEntryOption Colored(ftxui::Color c) {
   option.transform = [c](EntryState state) {
     state.label = (state.active ? "> " : "  ") + state.label;
     Element e = text(state.label) | color(c);
-    if (state.focused)
+    if (state.focused) {
       e = e | inverted;
-    if (state.active)
+    }
+    if (state.active) {
       e = e | bold;
+    }
     return e;
   };
   return option;

examples/component/menu_in_frame.cpp

@@ -17,8 +17,9 @@ int main() {
   std::vector<std::string> entries;
   int selected = 0;
 
-  for (int i = 0; i < 30; ++i)
+  for (int i = 0; i < 30; ++i) {
     entries.push_back("Entry " + std::to_string(i));
+  }
   auto radiobox = Menu(&entries, &selected);
   auto renderer = Renderer(radiobox, [&] {
     return radiobox->Render() | vscroll_indicator | frame |

examples/component/menu_in_frame_horizontal.cpp

@@ -17,8 +17,9 @@ int main() {
   std::vector<std::string> entries;
   int selected = 0;
 
-  for (int i = 0; i < 100; ++i)
+  for (int i = 0; i < 100; ++i) {
     entries.push_back(std::to_string(i));
+  }
   auto radiobox = Menu(&entries, &selected, MenuOption::Horizontal());
   auto renderer = Renderer(
       radiobox, [&] { return radiobox->Render() | hscroll_indicator | frame; });

examples/component/menu_style.cpp

@@ -116,10 +116,12 @@ Component VMenu1(std::vector<std::string>* entries, int* selected) {
   option.entries_option.transform = [](EntryState state) {
     state.label = (state.active ? "> " : "  ") + state.label;
     Element e = text(state.label);
-    if (state.focused)
+    if (state.focused) {
       e = e | bgcolor(Color::Blue);
-    if (state.active)
+    }
+    if (state.active) {
       e = e | bold;
+    }
     return e;
   };
   return Menu(entries, selected, option);
@@ -130,10 +132,12 @@ Component VMenu2(std::vector<std::string>* entries, int* selected) {
   option.entries_option.transform = [](EntryState state) {
     state.label += (state.active ? " <" : "  ");
     Element e = hbox(filler(), text(state.label));
-    if (state.focused)
+    if (state.focused) {
       e = e | bgcolor(Color::Red);
-    if (state.active)
+    }
+    if (state.active) {
       e = e | bold;
+    }
     return e;
   };
   return Menu(entries, selected, option);
@@ -144,13 +148,16 @@ Component VMenu3(std::vector<std::string>* entries, int* selected) {
   option.entries_option.transform = [](EntryState state) {
     Element e = state.active ? text("[" + state.label + "]")
                              : text(" " + state.label + " ");
-    if (state.focused)
+    if (state.focused) {
       e = e | bold;
+    }
 
-    if (state.focused)
+    if (state.focused) {
       e = e | color(Color::Blue);
-    if (state.active)
+    }
+    if (state.active) {
       e = e | bold;
+    }
     return e;
   };
   return Menu(entries, selected, option);
@@ -245,10 +252,12 @@ Component HMenu5(std::vector<std::string>* entries, int* selected) {
                                 animation::easing::ElasticOut);
   option.entries_option.transform = [](EntryState state) {
     Element e = text(state.label) | hcenter | flex;
-    if (state.active && state.focused)
+    if (state.active && state.focused) {
       e = e | bold;
-    if (!state.focused && !state.active)
+    }
+    if (!state.focused && !state.active) {
       e = e | dim;
+    }
     return e;
   };
   option.underline.color_inactive = Color::Default;

examples/component/menu_underline_animated_gallery.cpp

@@ -20,8 +20,9 @@ using namespace ftxui;
 Component DummyComponent(int id) {
   return Renderer([id](bool focused) {
     auto t = text("component " + std::to_string(id));
-    if (focused)
+    if (focused) {
       t = t | inverted;
+    }
     return t;
   });
 }

examples/component/radiobox_in_frame.cpp

@@ -17,8 +17,9 @@ int main() {
   std::vector<std::string> entries;
   int selected = 0;
 
-  for (int i = 0; i < 30; ++i)
+  for (int i = 0; i < 30; ++i) {
     entries.push_back("RadioBox " + std::to_string(i));
+  }
   auto radiobox = Radiobox(&entries, &selected);
   auto renderer = Renderer(radiobox, [&] {
     return radiobox->Render() | vscroll_indicator | frame |

examples/component/renderer.cpp

@@ -19,10 +19,11 @@ int main() {
 
   // 1. Example of focusable renderer:
   auto renderer_focusable = Renderer([](bool focused) {
-    if (focused)
+    if (focused) {
       return text("FOCUSABLE RENDERER()") | center | bold | border;
-    else
+    } else {
       return text(" Focusable renderer() ") | center | border;
+    }
   });
 
   // 2. Examples of a non focusable renderer.
@@ -33,10 +34,11 @@ int main() {
   // 3. Renderer can wrap other components to redefine their Render() function.
   auto button = Button("Wrapped quit button", screen.ExitLoopClosure());
   auto renderer_wrap = Renderer(button, [&] {
-    if (button->Focused())
+    if (button->Focused()) {
       return button->Render() | bold | color(Color::Red);
-    else
+    } else {
       return button->Render();
+    }
   });
 
   // Let's renderer everyone:

examples/dom/canvas.cpp

@@ -32,10 +32,12 @@ int main() {
 
   // Plot a function:
   std::vector<int> ys(100);
-  for (int x = 0; x < 100; x++)
+  for (int x = 0; x < 100; x++) {
     ys[x] = int(80 + 20 * cos(x * 0.2));
-  for (int x = 0; x < 99; x++)
+  }
+  for (int x = 0; x < 99; x++) {
     c.DrawPointLine(x, ys[x], x + 1, ys[x + 1], Color::Red);
+  }
 
   auto document = canvas(&c) | border;
 

examples/dom/package_manager.cpp

@@ -86,8 +86,9 @@ int main() {
 
   auto render = [&]() {
     std::vector<Element> entries;
-    for (auto& task : displayed_task)
+    for (auto& task : displayed_task) {
       entries.push_back(renderTask(task));
+    }
 
     return vbox({
         // List of tasks.
@@ -138,8 +139,9 @@ int main() {
     std::this_thread::sleep_for(0.01s);
 
     // Exit
-    if (nb_active + nb_queued == 0)
+    if (nb_active + nb_queued == 0) {
       break;
+    }
 
     // Update the model for the next frame.
     updateModel();

examples/dom/spinner.cpp

@@ -21,8 +21,9 @@ int main() {
   for (int index = 0; index < 200; ++index) {
     std::vector<Element> entries;
     for (int i = 0; i < 23; ++i) {
-      if (i != 0)
+      if (i != 0) {
         entries.push_back(separator());
+      }
       entries.push_back(  //
           hbox({
               text(std::to_string(i)) | size(WIDTH, EQUAL, 2),

examples/index.css

@@ -1,15 +1,19 @@
 @import url(https://fonts.googleapis.com/css?family=Khula:700);
 
+html {
+  --toc-width: 250px;
+}
+
 body {
-  background-color:#EEE;
+  background-color: #EEE;
-  padding:0px;
+  padding: 0px;
-  margin:0px;
+  margin: 0px;
   font-family: Khula, Helvetica, sans-serif;
   font-size: 130%;
 }
 
 .page {
-  max-width:1300px;
+  max-width: 1300px;
   margin: auto;
   padding: 10px;
 }
@@ -20,7 +24,7 @@ a {
   margin: 0 -.25rem;
   padding: 0 .25rem;
   transition: color .3s ease-in-out,
-              box-shadow .3s ease-in-out;
+    box-shadow .3s ease-in-out;
 }
 
 a:hover {
@@ -30,45 +34,48 @@ a:hover {
 
 h1 {
   text-decoration: underline;
-  width:100%;
+  width: 100%;
-  background-color: rgba(100,100,255,0.5);
+  background-color: rgba(100, 100, 255, 0.5);
   padding: 10px;
   margin: 0;
 }
 
 
 #selectExample {
-  flex:1;
+  flex: 1;
 }
 
-#selectExample, #selectExample option {
+#selectExample,
+#selectExample option {
   font-size: 16px;
   font-family: sans-serif;
   font-weight: 700;
   line-height: 1.3;
-  border:0px;
+  border: 0px;
   background-color: #bbb;
-  color:black;
+  color: black;
 }
 
 #selectExample:focus {
-  outline:none;
+  outline: none;
 }
 
 #terminal {
-  width:100%;
+  width: 100%;
   height 500px;
   height: calc(clamp(200px, 100vh - 300px, 900px));
   overflow: hidden;
-  border:none;
+  border: none;
-  background-color:black;
+  padding: 10px;
+  margin: 10px;
 }
 
 #terminalContainer {
   overflow: hidden;
   border-radius: 10px;
-  box-shadow: 0px 2px 10px 0px rgba(0,0,0,0.75),
+  box-shadow: 0px 2px 10px 0px rgba(0, 0, 0, 0.75),
-  0px 2px 80px 0px rgba(0,0,0,0.50);
+    0px 2px 80px 0px rgba(0, 0, 0, 0.50);
+  background-color: black;
 }
 
 .fakeButtons {
@@ -76,7 +83,7 @@ h1 {
   width: 10px;
   border-radius: 50%;
   border: 1px solid #000;
-  margin:6px;
+  margin: 6px;
   background-color: #ff3b47;
   border-color: #9d252b;
   display: inline-block;
@@ -95,13 +102,79 @@ h1 {
 }
 
 .fakeMenu {
-  display:flex;
+  display: flex;
   flex-direction: row;
-  width:100%;
+  width: 100%;
   box-sizing: border-box;
   height: 25px;
   background-color: #bbb;
-  color:black;
+  color: black;
   margin: 0 auto;
   overflow: hidden;
 }
+
+.toc-container {
+  position: fixed;
+  left: 0;
+  top: 0;
+  bottom: 0;
+  width: var(--toc-width);
+  background: white;
+  padding: 0;
+  overflow-y: auto;
+  overflow-x: hidden;
+  scrollbar-width: thin;
+}
+
+.toc-title {
+  font-weight: bold;
+  margin-bottom: 5px;
+  font-size: 0.9em;
+  color: #555;
+
+  position: sticky;
+  transition: position 1.0s ease-in-out;
+  top: 0;
+  z-index: 1;
+  padding: 20px;
+  margin: 0;
+
+  border-bottom: 1px solid #ddd;
+
+  /* Gradient background for the title */
+  background-color: #f0f0f0;
+}
+
+.toc-item {
+  padding: 3px 8px;
+  margin: 0;
+  cursor: pointer;
+  font-size: 0.85em;
+  border-radius: 3px;
+  transition: background 0.2s;
+}
+
+.toc-item:hover {
+  background: #f0f0f0;
+}
+
+.toc-item.selected {
+  background: #e0e0e0;
+  font-weight: bold;
+}
+
+@media (max-width: 1024px) {
+  .toc-container {
+    display: none;
+  }
+
+  .page {
+    margin-left: 0;
+  }
+}
+
+@media (min-width: 1025px) {
+  .page {
+    margin-left: calc(var(--toc-width) + 20px);
+  }
+}

examples/index.html

@@ -9,13 +9,18 @@
     <script type="module" src="index.mjs"></script>
   </head>
   <body>
+    <div class="toc-container">
+      <div class="toc-list"></div>
+    </div>
     <script id="example_script"></script>
 
     <div class="page">
       <p>
         <a href="https://github.com/ArthurSonzogni/FTXUI">FTXUI</a> is a simple
         functional C++ library for terminal user interface. <br/>
-        This showcases the: <a href="https://github.com/ArthurSonzogni/FTXUI/tree/master/examples">./example/</a> folder. <br/>
+        This showcases the: <a
+          href="https://github.com/ArthurSonzogni/FTXUI/tree/master/examples">./example/</a>
+        folder. See <a id="source">source</a>.
       </p>
 
       <div id="terminalContainer">

examples/index.mjs

@@ -55,7 +55,7 @@ const stdout = code => {
 const stderr = code => {
   if (code == 0 || code == 10) {
     console.error(String.fromCodePoint(...stderr_buffer));
-    stderr_buffer = [];
+    stderr_buffer.length = 0;
   } else {
     stderr_buffer.push(code)
   }
@@ -89,12 +89,72 @@ window.Module = {
     const resize_observer = new ResizeObserver(resize_handler);
     resize_observer.observe(term_element);
     resize_handler();
-
-    // Disable scrollbar
-    //term.write('\x1b[?47h')
   },
 };
 
+const source = document.querySelector("#source");
+source.href = "https://github.com/ArthurSonzogni/FTXUI/blob/main/examples/" + example + ".cpp";
+
 const words = example.split('/')
 words[1] = "ftxui_example_" + words[1] + ".js"
 document.querySelector("#example_script").src = words.join('/');
+
+
+// Table of Contents (TOC) for quick navigation.
+
+// Get select element
+const selectEl = document.querySelector('select#selectExample');
+if (!selectEl) {
+  console.error('select#selectExample not found');
+} else {
+  // Get TOC container
+  const tocContainer = document.querySelector('.toc-container');
+  const tocList = tocContainer.querySelector('.toc-list');
+
+  // Group options by directory
+  const groupedOptions = Array.from(selectEl.options).reduce((acc, option) => {
+    const [dir, file] = option.text.split('/');
+    if (!acc[dir]) {
+      acc[dir] = [];
+    }
+    acc[dir].push({ option, file });
+    return acc;
+  }, {});
+
+  // Generate TOC items
+  for (const dir in groupedOptions) {
+    const dirContainer = document.createElement('div');
+
+    const dirHeader = document.createElement('div');
+    dirHeader.textContent = dir;
+    dirHeader.className = 'toc-title';
+    dirContainer.appendChild(dirHeader);
+
+    groupedOptions[dir].forEach(({ option, file }) => {
+      const tocItem = document.createElement('div');
+      tocItem.textContent = file;
+      tocItem.className = 'toc-item';
+
+      if (selectEl.options[selectEl.selectedIndex].value === option.value) {
+        tocItem.classList.add('selected');
+      }
+
+      // Click handler
+      tocItem.addEventListener('click', () => {
+        for(let i=0; i<selectEl.options.length; ++i) {
+          if (selectEl.options[i].value == option.value) {
+            selectEl.selectedIndex = i;
+            break;
+          }
+        }
+
+        history.pushState({}, "", "?file=" + option.value);
+        location.reload();
+      });
+
+      dirContainer.appendChild(tocItem);
+    });
+
+    tocList.appendChild(dirContainer);
+  }
+}''

include/ftxui/component/component.hpp

@@ -8,6 +8,7 @@
 #include <memory>      // for make_shared, shared_ptr
 #include <utility>     // for forward
 
+#include <ftxui/util/warn_windows_macro.hpp>
 #include "ftxui/component/component_base.hpp"  // for Component, Components
 #include "ftxui/component/component_options.hpp"  // for ButtonOption, CheckboxOption, MenuOption
 #include "ftxui/dom/elements.hpp"  // for Element

include/ftxui/component/component_options.hpp

@@ -9,8 +9,9 @@
 #include <ftxui/dom/direction.hpp>  // for Direction, Direction::Left, Direction::Right, Direction::Down
 #include <ftxui/dom/elements.hpp>  // for Element, separator
 #include <ftxui/util/ref.hpp>      // for Ref, ConstRef, StringRef
-#include <functional>              // for function
+#include <ftxui/util/warn_windows_macro.hpp>
-#include <string>                  // for string
+#include <functional>  // for function
+#include <string>      // for string
 
 #include "ftxui/component/component_base.hpp"  // for Component
 #include "ftxui/screen/color.hpp"  // for Color, Color::GrayDark, Color::White

include/ftxui/component/receiver.hpp

@@ -4,6 +4,7 @@
 #ifndef FTXUI_COMPONENT_RECEIVER_HPP_
 #define FTXUI_COMPONENT_RECEIVER_HPP_
 
+#include <ftxui/util/warn_windows_macro.hpp>
 #include <algorithm>           // for copy, max
 #include <atomic>              // for atomic, __atomic_base
 #include <condition_variable>  // for condition_variable
@@ -14,6 +15,8 @@
 
 namespace ftxui {
 
+// Deprecated
+//
 // Usage:
 //
 // Initialization:
@@ -39,17 +42,24 @@ namespace ftxui {
 // Receiver::Receive() returns true when there are no more senders.
 
 // clang-format off
+// Deprecated:
 template<class T> class SenderImpl;
+// Deprecated:
 template<class T> class ReceiverImpl;
+// Deprecated:
 
+// Deprecated:
 template<class T> using Sender = std::unique_ptr<SenderImpl<T>>;
+// Deprecated:
 template<class T> using Receiver = std::unique_ptr<ReceiverImpl<T>>;
+// Deprecated:
 template<class T> Receiver<T> MakeReceiver();
 // clang-format on
 
 // ---- Implementation part ----
 
 template <class T>
+// Deprecated:
 class SenderImpl {
  public:
   SenderImpl(const SenderImpl&) = delete;

include/ftxui/component/screen_interactive.hpp

@@ -4,12 +4,10 @@
 #ifndef FTXUI_COMPONENT_SCREEN_INTERACTIVE_HPP
 #define FTXUI_COMPONENT_SCREEN_INTERACTIVE_HPP
 
-#include <atomic>                        // for atomic
+#include <atomic>      // for atomic
-#include <ftxui/component/receiver.hpp>  // for Receiver, Sender
+#include <functional>  // for function
-#include <functional>                    // for function
+#include <memory>      // for shared_ptr
-#include <memory>                        // for shared_ptr
+#include <string>      // for string
-#include <string>                        // for string
-#include <thread>                        // for thread
 
 #include "ftxui/component/animation.hpp"       // for TimePoint
 #include "ftxui/component/captured_mouse.hpp"  // for CapturedMouse
@@ -26,6 +24,10 @@ struct Event;
 using Component = std::shared_ptr<ComponentBase>;
 class ScreenInteractivePrivate;
 
+namespace task {
+class TaskRunner;
+}
+
 /// @brief ScreenInteractive is a `Screen` that can handle events, run a main
 /// loop, and manage components.
 ///
@@ -40,6 +42,9 @@ class ScreenInteractive : public Screen {
   static ScreenInteractive FitComponent();
   static ScreenInteractive TerminalOutput();
 
+  // Destructor.
+  ~ScreenInteractive();
+
   // Options. Must be called before Loop().
   void TrackMouse(bool enable = true);
 
@@ -97,6 +102,10 @@ class ScreenInteractive : public Screen {
 
   void Signal(int signal);
 
+  void FetchTerminalEvents();
+
+  void PostAnimationTask();
+
   ScreenInteractive* suspended_screen_ = nullptr;
   enum class Dimension {
     FitComponent,
@@ -113,15 +122,10 @@ class ScreenInteractive : public Screen {
 
   bool track_mouse_ = true;
 
-  Sender<Task> task_sender_;
-  Receiver<Task> task_receiver_;
-
   std::string set_cursor_position;
   std::string reset_cursor_position;
 
   std::atomic<bool> quit_{false};
-  std::thread event_listener_;
-  std::thread animation_listener_;
   bool animation_requested_ = false;
   animation::TimePoint previous_animation_time_;
 
@@ -156,8 +160,14 @@ class ScreenInteractive : public Screen {
   std::unique_ptr<Selection> selection_;
   std::function<void()> selection_on_change_;
 
+  // PIMPL private implementation idiom (Pimpl).
+  struct Internal;
+  std::unique_ptr<Internal> internal_;
+
   friend class Loop;
 
+  Component component_;
+
  public:
   class Private {
    public:

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/image.hpp

@@ -20,6 +20,9 @@ class Image {
   Image() = delete;
   Image(int dimx, int dimy);
 
+  // Destructor:
+  virtual ~Image() = default;
+
   // Access a character in the grid at a given position.
   std::string& at(int x, int y);
   const std::string& at(int x, int y) const;

include/ftxui/screen/screen.hpp

@@ -11,7 +11,6 @@
 
 #include "ftxui/screen/image.hpp"     // for Pixel, Image
 #include "ftxui/screen/terminal.hpp"  // for Dimensions
-#include "ftxui/util/autoreset.hpp"   // for AutoReset
 
 namespace ftxui {
 
@@ -31,6 +30,9 @@ class Screen : public Image {
   static Screen Create(Dimensions dimension);
   static Screen Create(Dimensions width, Dimensions height);
 
+  // Destructor:
+  ~Screen() override = default;
+
   std::string ToString() const;
 
   // Print the Screen on to the terminal.
@@ -58,7 +60,7 @@ class Screen : public Image {
       BarBlinking = 5,
       Bar = 6,
     };
-    Shape shape;
+    Shape shape = Hidden;
   };
 
   Cursor cursor() const { return cursor_; }

include/ftxui/util/warn_windows_macro.hpp

@@ -0,0 +1,18 @@
+// 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_UTIL_WARN_WINDOWS_MACRO_H_
+#define FTXUI_UTIL_WARN_WINDOWS_MACRO_H_
+
+#ifdef min
+#error \
+    "The macro 'min' is defined, which conflicts with the standard C++ library and FTXUI. This is often caused by including <windows.h>. To fix this, add '#define NOMINMAX' before including <windows.h>, or pass '/DNOMINMAX' as a compiler flag."
+#endif
+
+#ifdef max
+#error \
+    "The macro 'max' is defined, which conflicts with the standard C++ library and FTXUI. This is often caused by including <windows.h>. To fix this, add '#define NOMINMAX' before including <windows.h>, or pass '/DNOMINMAX' as a compiler flag."
+#endif
+
+#endif  // FTXUI_UTIL_WARN_WINDOWS_MACRO_H_

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"
@@ -22,8 +23,9 @@ bool GeneratorBool(const char*& data, size_t& size) {
 
 std::string GeneratorString(const char*& data, size_t& size) {
   int index = 0;
-  while (index < size && data[index])
+  while (index < size && data[index]) {
     ++index;
+  }
 
   auto out = std::string(data, data + index);
   data += index;
@@ -39,8 +41,9 @@ std::string GeneratorString(const char*& data, size_t& size) {
 }
 
 int GeneratorInt(const char* data, size_t size) {
-  if (size == 0)
+  if (size == 0) {
     return 0;
+  }
   auto out = int(data[0]);
   data++;
   size--;
@@ -112,8 +115,9 @@ Components GeneratorComponents(const char*& data, size_t& size, int depth);
 Component GeneratorComponent(const char*& data, size_t& size, int depth) {
   depth--;
   int value = GeneratorInt(data, size);
-  if (depth <= 0)
+  if (depth <= 0) {
     return Button(GeneratorString(data, size), [] {});
+  }
 
   constexpr int value_max = 19;
   value = (value % value_max + value_max) % value_max;
@@ -212,16 +216,17 @@ 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>();
+  // Generate some events.
-  {
+  std::vector<Event> events;
-    auto parser = TerminalInputParser(event_receiver->MakeSender());
+  auto parser =
-    for (size_t i = 0; i < size; ++i)
+      TerminalInputParser([&](const Event& event) { events.push_back(event); });
-      parser.Add(data[i]);
+
+  for (size_t i = 0; i < size; ++i) {
+    parser.Add(data[i]);
   }
 
-  Task event;
+  for (const auto& event : events) {
-  while (event_receiver->Receive(&event)) {
+    component->OnEvent(event);
-    component->OnEvent(std::get<Event>(event));
     auto document = component->Render();
     Render(screen, document);
   }

src/ftxui/component/receiver.cppm

@@ -12,9 +12,15 @@ export module ftxui.component.receiver;
  * @brief The FTXUI ftxui:: namespace
  */
 export namespace ftxui {
+    // Deprecated:
     using ftxui::SenderImpl;
+    // Deprecated:
     using ftxui::ReceiverImpl;
+    // Deprecated:
     using ftxui::Sender;
+    // Deprecated:
     using ftxui::Receiver;
+    // Deprecated:
     using ftxui::MakeReceiver;
+    // Deprecated:
 }

src/ftxui/component/receiver_test.cpp

@@ -1,81 +0,0 @@
-// 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 <thread>   // for thread
-#include <utility>  // for move
-
-#include "ftxui/component/receiver.hpp"
-#include "gtest/gtest.h"  // for AssertionResult, Message, Test, TestPartResult, EXPECT_EQ, EXPECT_TRUE, EXPECT_FALSE, TEST
-
-// NOLINTBEGIN
-namespace ftxui {
-
-TEST(Receiver, Basic) {
-  auto receiver = MakeReceiver<char>();
-  auto sender = receiver->MakeSender();
-
-  sender->Send('a');
-  sender->Send('b');
-  sender->Send('c');
-  sender.reset();
-
-  char a, b, c, d;
-  EXPECT_TRUE(receiver->Receive(&a));
-  EXPECT_TRUE(receiver->Receive(&b));
-  EXPECT_TRUE(receiver->Receive(&c));
-  EXPECT_FALSE(receiver->Receive(&d));
-
-  EXPECT_EQ(a, 'a');
-  EXPECT_EQ(b, 'b');
-  EXPECT_EQ(c, 'c');
-}
-
-TEST(Receiver, BasicWithThread) {
-  auto r1 = MakeReceiver<char>();
-  auto r2 = MakeReceiver<char>();
-  auto r3 = MakeReceiver<char>();
-
-  auto s1 = r1->MakeSender();
-  auto s2 = r2->MakeSender();
-  auto s3 = r3->MakeSender();
-
-  auto s1_bis = r1->MakeSender();
-
-  auto stream = [](Receiver<char> receiver, Sender<char> sender) {
-    char c;
-    while (receiver->Receive(&c))
-      sender->Send(c);
-  };
-
-  // Convert data from a different thread.
-  auto t12 = std::thread(stream, std::move(r1), std::move(s2));
-  auto t23 = std::thread(stream, std::move(r2), std::move(s3));
-
-  // Send some data.
-  s1->Send('1');
-  s1_bis->Send('2');
-  s1->Send('3');
-  s1_bis->Send('4');
-
-  // Close the stream.
-  s1.reset();
-  s1_bis.reset();
-
-  char c;
-  EXPECT_TRUE(r3->Receive(&c));
-  EXPECT_EQ(c, '1');
-  EXPECT_TRUE(r3->Receive(&c));
-  EXPECT_EQ(c, '2');
-  EXPECT_TRUE(r3->Receive(&c));
-  EXPECT_EQ(c, '3');
-  EXPECT_TRUE(r3->Receive(&c));
-  EXPECT_EQ(c, '4');
-  EXPECT_FALSE(r3->Receive(&c));
-
-  // Thread will end at the end of the stream.
-  t12.join();
-  t23.join();
-}
-
-}  // namespace ftxui
-// NOLINTEND

src/ftxui/component/screen_interactive.cpp

@@ -17,24 +17,22 @@
 #include <memory>
 #include <stack>  // for stack
 #include <string>
-#include <thread>       // for thread, sleep_for
+#include <thread>   // for thread, sleep_for
-#include <tuple>        // for _Swallow_assign, ignore
+#include <tuple>    // for _Swallow_assign, ignore
-#include <type_traits>  // for decay_t
+#include <utility>  // for move, swap
-#include <utility>      // for move, swap
+#include <variant>  // for visit, variant
-#include <variant>      // for visit, variant
+#include <vector>   // for vector
-#include <vector>       // for vector
 #include "ftxui/component/animation.hpp"  // for TimePoint, Clock, Duration, Params, RequestAnimationFrame
 #include "ftxui/component/captured_mouse.hpp"  // for CapturedMouse, CapturedMouseInterface
 #include "ftxui/component/component_base.hpp"  // for ComponentBase
 #include "ftxui/component/event.hpp"           // for Event
 #include "ftxui/component/loop.hpp"            // for Loop
-#include "ftxui/component/receiver.hpp"  // for ReceiverImpl, Sender, MakeReceiver, SenderImpl, Receiver
+#include "ftxui/component/task_runner.hpp"
 #include "ftxui/component/terminal_input_parser.hpp"  // for TerminalInputParser
 #include "ftxui/dom/node.hpp"                         // for Node, Render
-#include "ftxui/dom/requirement.hpp"                  // for Requirement
-#include "ftxui/screen/pixel.hpp"                     // for Pixel
 #include "ftxui/screen/terminal.hpp"                  // for Dimensions, Size
 #include "ftxui/screen/util.hpp"                      // for util::clamp
+#include "ftxui/util/autoreset.hpp"                   // for AutoReset
 
 #if defined(_WIN32)
 #define DEFINE_CONSOLEV2_PROPERTIES
@@ -47,9 +45,11 @@
 #error Must be compiled in UNICODE mode
 #endif
 #else
+#include <fcntl.h>
 #include <sys/select.h>  // for select, FD_ISSET, FD_SET, FD_ZERO, fd_set, timeval
 #include <termios.h>  // for tcsetattr, termios, tcgetattr, TCSANOW, cc_t, ECHO, ICANON, VMIN, VTIME
 #include <unistd.h>  // for STDIN_FILENO, read
+#include <cerrno>
 #endif
 
 // Quick exit is missing in standard CLang headers
@@ -59,6 +59,20 @@
 
 namespace ftxui {
 
+struct ScreenInteractive::Internal {
+  // Convert char to Event.
+  TerminalInputParser terminal_input_parser;
+
+  task::TaskRunner task_runner;
+
+  // The last time a character was received.
+  std::chrono::time_point<std::chrono::steady_clock> last_char_time =
+      std::chrono::steady_clock::now();
+
+  explicit Internal(std::function<void(Event)> out)
+      : terminal_input_parser(std::move(out)) {}
+};
+
 namespace animation {
 void RequestAnimationFrame() {
   auto* screen = ScreenInteractive::Active();
@@ -82,73 +96,9 @@ constexpr int timeout_milliseconds = 20;
     timeout_milliseconds * 1000;
 #if defined(_WIN32)
 
-void EventListener(std::atomic<bool>* quit, Sender<Task> out) {
-  auto console = GetStdHandle(STD_INPUT_HANDLE);
-  auto parser = TerminalInputParser(out->Clone());
-  while (!*quit) {
-    // Throttle ReadConsoleInput by waiting 250ms, this wait function will
-    // return if there is input in the console.
-    auto wait_result = WaitForSingleObject(console, timeout_milliseconds);
-    if (wait_result == WAIT_TIMEOUT) {
-      parser.Timeout(timeout_milliseconds);
-      continue;
-    }
-
-    DWORD number_of_events = 0;
-    if (!GetNumberOfConsoleInputEvents(console, &number_of_events))
-      continue;
-    if (number_of_events <= 0)
-      continue;
-
-    std::vector<INPUT_RECORD> records{number_of_events};
-    DWORD number_of_events_read = 0;
-    ReadConsoleInput(console, records.data(), (DWORD)records.size(),
-                     &number_of_events_read);
-    records.resize(number_of_events_read);
-
-    for (const auto& r : records) {
-      switch (r.EventType) {
-        case KEY_EVENT: {
-          auto key_event = r.Event.KeyEvent;
-          // ignore UP key events
-          if (key_event.bKeyDown == FALSE)
-            continue;
-          std::wstring wstring;
-          wstring += key_event.uChar.UnicodeChar;
-          for (auto it : to_string(wstring)) {
-            parser.Add(it);
-          }
-        } break;
-        case WINDOW_BUFFER_SIZE_EVENT:
-          out->Send(Event::Special({0}));
-          break;
-        case MENU_EVENT:
-        case FOCUS_EVENT:
-        case MOUSE_EVENT:
-          // TODO(mauve): Implement later.
-          break;
-      }
-    }
-  }
-}
-
 #elif defined(__EMSCRIPTEN__)
 #include <emscripten.h>
 
-// Read char from the terminal.
-void EventListener(std::atomic<bool>* quit, Sender<Task> out) {
-  auto parser = TerminalInputParser(std::move(out));
-
-  char c;
-  while (!*quit) {
-    while (read(STDIN_FILENO, &c, 1), c)
-      parser.Add(c);
-
-    emscripten_sleep(1);
-    parser.Timeout(1);
-  }
-}
-
 extern "C" {
 EMSCRIPTEN_KEEPALIVE
 void ftxui_on_resize(int columns, int rows) {
@@ -162,8 +112,8 @@ void ftxui_on_resize(int columns, int rows) {
 
 #else  // POSIX (Linux & Mac)
 
-int CheckStdinReady(int usec_timeout) {
+int CheckStdinReady() {
-  timeval tv = {0, usec_timeout};  // NOLINT
+  timeval tv = {0, 0};  // NOLINT
   fd_set fds;
   FD_ZERO(&fds);                                          // NOLINT
   FD_SET(STDIN_FILENO, &fds);                             // NOLINT
@@ -171,24 +121,6 @@ int CheckStdinReady(int usec_timeout) {
   return FD_ISSET(STDIN_FILENO, &fds);                    // NOLINT
 }
 
-// Read char from the terminal.
-void EventListener(std::atomic<bool>* quit, Sender<Task> out) {
-  auto parser = TerminalInputParser(std::move(out));
-
-  while (!*quit) {
-    if (!CheckStdinReady(timeout_microseconds)) {
-      parser.Timeout(timeout_milliseconds);
-      continue;
-    }
-
-    const size_t buffer_size = 100;
-    std::array<char, buffer_size> buffer;                        // NOLINT;
-    size_t l = read(fileno(stdin), buffer.data(), buffer_size);  // NOLINT
-    for (size_t i = 0; i < l; ++i) {
-      parser.Add(buffer[i]);  // NOLINT
-    }
-  }
-}
 #endif
 
 std::stack<Closure> on_exit_functions;  // NOLINT
@@ -335,15 +267,6 @@ class CapturedMouseImpl : public CapturedMouseInterface {
   std::function<void(void)> callback_;
 };
 
-void AnimationListener(std::atomic<bool>* quit, Sender<Task> out) {
-  // Animation at around 60fps.
-  const auto time_delta = std::chrono::milliseconds(15);
-  while (!*quit) {
-    out->Send(AnimationTask());
-    std::this_thread::sleep_for(time_delta);
-  }
-}
-
 }  // namespace
 
 ScreenInteractive::ScreenInteractive(Dimension dimension,
@@ -353,7 +276,8 @@ ScreenInteractive::ScreenInteractive(Dimension dimension,
     : Screen(dimx, dimy),
       dimension_(dimension),
       use_alternative_screen_(use_alternative_screen) {
-  task_receiver_ = MakeReceiver<Task>();
+  internal_ = std::make_unique<Internal>(
+      [&](Event event) { PostEvent(std::move(event)); });
 }
 
 // static
@@ -381,10 +305,10 @@ ScreenInteractive ScreenInteractive::Fullscreen() {
 ScreenInteractive ScreenInteractive::FullscreenPrimaryScreen() {
   auto terminal = Terminal::Size();
   return {
-    Dimension::Fullscreen,
+      Dimension::Fullscreen,
-    terminal.dimx,
+      terminal.dimx,
-    terminal.dimy,
+      terminal.dimy,
-    /*use_alternative_screen=*/false,
+      /*use_alternative_screen=*/false,
   };
 }
 
@@ -409,11 +333,13 @@ ScreenInteractive ScreenInteractive::TerminalOutput() {
   return {
       Dimension::TerminalOutput,
       terminal.dimx,
-      terminal.dimy, // Best guess.
+      terminal.dimy,  // Best guess.
       /*use_alternative_screen=*/false,
   };
 }
 
+ScreenInteractive::~ScreenInteractive() = default;
+
 /// Create a ScreenInteractive whose width and height match the component being
 /// drawn.
 // static
@@ -421,8 +347,8 @@ ScreenInteractive ScreenInteractive::FitComponent() {
   auto terminal = Terminal::Size();
   return {
       Dimension::FitComponent,
-      terminal.dimx, // Best guess.
+      terminal.dimx,  // Best guess.
-      terminal.dimy, // Best guess.
+      terminal.dimy,  // Best guess.
       false,
   };
 }
@@ -449,13 +375,9 @@ void ScreenInteractive::TrackMouse(bool enable) {
 /// @brief Add a task to the main loop.
 /// It will be executed later, after every other scheduled tasks.
 void ScreenInteractive::Post(Task task) {
-  // Task/Events sent toward inactive screen or screen waiting to become
+  internal_->task_runner.PostTask([this, task = std::move(task)]() mutable {
-  // inactive are dropped.
+    HandleTask(component_, task);
-  if (!task_sender_) {
+  });
-    return;
-  }
-
-  task_sender_->Send(std::move(task));
 }
 
 /// @brief Add an event to the main loop.
@@ -499,7 +421,7 @@ void ScreenInteractive::Loop(Component component) {  // NOLINT
 
 /// @brief Return whether the main loop has been quit.
 bool ScreenInteractive::HasQuitted() {
-  return task_receiver_->HasQuitted();
+  return quit_;
 }
 
 // private
@@ -656,7 +578,15 @@ void ScreenInteractive::Install() {
 
   SetConsoleMode(stdin_handle, in_mode);
   SetConsoleMode(stdout_handle, out_mode);
-#else
+#else  // POSIX (Linux & Mac)
+  // #if defined(__EMSCRIPTEN__)
+  //// Reading stdin isn't blocking.
+  // int flags = fcntl(0, F_GETFL, 0);
+  // fcntl(0, F_SETFL, flags | O_NONBLOCK);
+
+  //// Restore the terminal configuration on exit.
+  // on_exit_functions.emplace([flags] { fcntl(0, F_SETFL, flags); });
+  // #endif
   for (const int signal : {SIGWINCH, SIGTSTP}) {
     InstallSignalHandler(signal);
   }
@@ -729,40 +659,57 @@ void ScreenInteractive::Install() {
   Flush();
 
   quit_ = false;
-  task_sender_ = task_receiver_->MakeSender();
+
-  event_listener_ =
+  PostAnimationTask();
-      std::thread(&EventListener, &quit_, task_receiver_->MakeSender());
-  animation_listener_ =
-      std::thread(&AnimationListener, &quit_, task_receiver_->MakeSender());
 }
 
 // private
 void ScreenInteractive::Uninstall() {
   ExitNow();
-  event_listener_.join();
-  animation_listener_.join();
   OnExit();
 }
 
 // private
 // NOLINTNEXTLINE
 void ScreenInteractive::RunOnceBlocking(Component component) {
-  ExecuteSignalHandlers();
+  // Set FPS to 60 at most.
-  Task task;
+  const auto time_per_frame = std::chrono::microseconds(16666);  // 1s / 60fps
-  if (task_receiver_->Receive(&task)) {
+
-    HandleTask(component, task);
+  auto time = std::chrono::steady_clock::now();
+  size_t executed_task = internal_->task_runner.ExecutedTasks();
+
+  // Wait for at least one task to execute.
+  while (executed_task == internal_->task_runner.ExecutedTasks() &&
+         !HasQuitted()) {
+    RunOnce(component);
+
+    const auto now = std::chrono::steady_clock::now();
+    const auto delta = now - time;
+    time = now;
+
+    if (delta < time_per_frame) {
+      const auto sleep_duration = time_per_frame - delta;
+      std::this_thread::sleep_for(sleep_duration);
+    }
   }
-  RunOnce(component);
 }
 
 // private
 void ScreenInteractive::RunOnce(Component component) {
-  Task task;
+  AutoReset set_component(&component_, component);
-  while (task_receiver_->ReceiveNonBlocking(&task)) {
+  ExecuteSignalHandlers();
-    HandleTask(component, task);
+  FetchTerminalEvents();
-    ExecuteSignalHandlers();
+
+  // Execute the pending tasks from the queue.
+  const size_t executed_task = internal_->task_runner.ExecutedTasks();
+  internal_->task_runner.RunUntilIdle();
+  // If no executed task, we can return early without redrawing the screen.
+  if (executed_task == internal_->task_runner.ExecutedTasks()) {
+    return;
   }
-  Draw(std::move(component));
+
+  ExecuteSignalHandlers();
+  Draw(component);
 
   if (selection_data_previous_ != selection_data_) {
     selection_data_previous_ = selection_data_;
@@ -783,6 +730,7 @@ void ScreenInteractive::HandleTask(Component component, Task& task) {
         // clang-format off
     // Handle Event.
     if constexpr (std::is_same_v<T, Event>) {
+
       if (arg.is_cursor_position()) {
         cursor_x_ = arg.cursor_x();
         cursor_y_ = arg.cursor_y();
@@ -1034,7 +982,6 @@ void ScreenInteractive::Exit() {
 // private:
 void ScreenInteractive::ExitNow() {
   quit_ = true;
-  task_sender_.reset();
 }
 
 // private:
@@ -1067,6 +1014,118 @@ void ScreenInteractive::Signal(int signal) {
 #endif
 }
 
+void ScreenInteractive::FetchTerminalEvents() {
+#if defined(_WIN32)
+  auto get_input_records = [&]() -> std::vector<INPUT_RECORD> {
+    // Check if there is input in the console.
+    auto console = GetStdHandle(STD_INPUT_HANDLE);
+    DWORD number_of_events = 0;
+    if (!GetNumberOfConsoleInputEvents(console, &number_of_events)) {
+      return std::vector<INPUT_RECORD>();
+    }
+    if (number_of_events <= 0) {
+      // No input, return.
+      return std::vector<INPUT_RECORD>();
+    }
+    // Read the input events.
+    std::vector<INPUT_RECORD> records(number_of_events);
+    DWORD number_of_events_read = 0;
+    if (!ReadConsoleInput(console, records.data(), (DWORD)records.size(),
+                          &number_of_events_read)) {
+      return std::vector<INPUT_RECORD>();
+    }
+    records.resize(number_of_events_read);
+    return records;
+  };
+
+  auto records = get_input_records();
+  if (records.size() == 0) {
+    const auto timeout =
+        std::chrono::steady_clock::now() - internal_->last_char_time;
+    const size_t timeout_microseconds =
+        std::chrono::duration_cast<std::chrono::microseconds>(timeout).count();
+    internal_->terminal_input_parser.Timeout(timeout_microseconds);
+    return;
+  }
+  internal_->last_char_time = std::chrono::steady_clock::now();
+
+  // Convert the input events to FTXUI events.
+  // For each event, we call the terminal input parser to convert it to
+  // Event.
+  for (const auto& r : records) {
+    switch (r.EventType) {
+      case KEY_EVENT: {
+        auto key_event = r.Event.KeyEvent;
+        // ignore UP key events
+        if (key_event.bKeyDown == FALSE) {
+          continue;
+        }
+        std::wstring wstring;
+        wstring += key_event.uChar.UnicodeChar;
+        for (auto it : to_string(wstring)) {
+          internal_->terminal_input_parser.Add(it);
+        }
+      } break;
+      case WINDOW_BUFFER_SIZE_EVENT:
+        Post(Event::Special({0}));
+        break;
+      case MENU_EVENT:
+      case FOCUS_EVENT:
+      case MOUSE_EVENT:
+        // TODO(mauve): Implement later.
+        break;
+    }
+  }
+#elif defined(__EMSCRIPTEN__)
+  // Read chars from the terminal.
+  // We configured it to be non blocking.
+  std::array<char, 128> out{};
+  size_t l = read(STDIN_FILENO, out.data(), out.size());
+  if (l == 0) {
+    const auto timeout =
+        std::chrono::steady_clock::now() - internal_->last_char_time;
+    const size_t timeout_microseconds =
+        std::chrono::duration_cast<std::chrono::microseconds>(timeout).count();
+    internal_->terminal_input_parser.Timeout(timeout_microseconds);
+    return;
+  }
+  internal_->last_char_time = std::chrono::steady_clock::now();
+
+  // Convert the chars to events.
+  for (size_t i = 0; i < l; ++i) {
+    internal_->terminal_input_parser.Add(out[i]);
+  }
+#else  // POSIX (Linux & Mac)
+  if (!CheckStdinReady()) {
+    const auto timeout =
+        std::chrono::steady_clock::now() - internal_->last_char_time;
+    const size_t timeout_ms =
+        std::chrono::duration_cast<std::chrono::milliseconds>(timeout).count();
+    internal_->terminal_input_parser.Timeout(timeout_ms);
+    return;
+  }
+  internal_->last_char_time = std::chrono::steady_clock::now();
+
+  // Read chars from the terminal.
+  std::array<char, 128> out{};
+  size_t l = read(fileno(stdin), out.data(), out.size());
+
+  // Convert the chars to events.
+  for (size_t i = 0; i < l; ++i) {
+    internal_->terminal_input_parser.Add(out[i]);
+  }
+#endif
+}
+
+void ScreenInteractive::PostAnimationTask() {
+  Post(AnimationTask());
+
+  // Repeat the animation task every 15ms. This correspond to a frame rate
+  // of around 66fps.
+  internal_->task_runner.PostDelayedTask([this] { PostAnimationTask(); },
+                                         std::chrono::milliseconds(15));
+}
+
 bool ScreenInteractive::SelectionData::operator==(
     const ScreenInteractive::SelectionData& other) const {
   if (empty && other.empty) {

src/ftxui/component/screen_interactive_test.cpp

@@ -27,9 +27,10 @@ namespace {
 // Capture the standard output (stdout) to a string.
 class StdCapture {
  public:
-  explicit StdCapture(std::string* captured)
+  explicit StdCapture(std::string* captured) : captured_(captured) {
-      : captured_(captured) {
+    if (pipe(pipefd_) != 0) {
-    if (pipe(pipefd_) != 0) return;
+      return;
+    }
     old_stdout_ = dup(fileno(stdout));
     fflush(stdout);
     dup2(pipefd_[1], fileno(stdout));
@@ -188,14 +189,14 @@ TEST(ScreenInteractive, FixedSizeInitialFrame) {
     auto capture = StdCapture(&output);
 
     auto screen = ScreenInteractive::FixedSize(2, 2);
-    auto component = Renderer([&] {
+    auto component = Renderer([&] { return text("AB"); });
-      return text("AB");
-    });
 
     Loop loop(&screen, component);
     loop.RunOnce();
   }
-  ASSERT_EQ(
+  using namespace std::string_view_literals;
+
+  auto expected =
       // Install the ScreenInteractive.
       "\0"           // Flush stdout.
       "\x1BP$q q"    // Set cursor shape to 1 (block).
@@ -236,10 +237,9 @@ TEST(ScreenInteractive, FixedSizeInitialFrame) {
       "\0"           // Flush stdout.
 
       // Skip one line to avoid the prompt to be printed over the last drawing.
-      "\r\n",
+      "\r\n"sv;
-      output);
+  ASSERT_EQ(expected, output);
 #endif
-
 }
 
 }  // namespace ftxui

src/ftxui/component/slider.cpp

@@ -33,6 +33,20 @@ Decorator flexDirection(Direction direction) {
   return xflex;  // NOT_REACHED()
 }
 
+Direction Opposite(Direction d) {
+  switch (d) {
+    case Direction::Up:
+      return Direction::Down;
+    case Direction::Down:
+      return Direction::Up;
+    case Direction::Left:
+      return Direction::Right;
+    case Direction::Right:
+      return Direction::Left;
+  }
+  return d;  // NOT_REACHED()
+}
+
 template <class T>
 class SliderBase : public SliderOption<T>, public ComponentBase {
  public:
@@ -47,59 +61,15 @@ class SliderBase : public SliderOption<T>, public ComponentBase {
            flexDirection(this->direction) | reflect(gauge_box_) | gauge_color;
   }
 
-  void OnLeft() {
+  void OnDirection(Direction pressed) {
-    switch (this->direction) {
+    if (pressed == this->direction) {
-      case Direction::Right:
+      this->value() += this->increment();
-        this->value() -= this->increment();
+      return;
-        break;
-      case Direction::Left:
-        this->value() += this->increment();
-        break;
-      case Direction::Up:
-      case Direction::Down:
-        break;
     }
-  }
 
-  void OnRight() {
+    if (pressed == Opposite(this->direction)) {
-    switch (this->direction) {
+      this->value() -= this->increment();
-      case Direction::Right:
+      return;
-        this->value() += this->increment();
-        break;
-      case Direction::Left:
-        this->value() -= this->increment();
-        break;
-      case Direction::Up:
-      case Direction::Down:
-        break;
-    }
-  }
-
-  void OnUp() {
-    switch (this->direction) {
-      case Direction::Up:
-        this->value() -= this->increment();
-        break;
-      case Direction::Down:
-        this->value() += this->increment();
-        break;
-      case Direction::Left:
-      case Direction::Right:
-        break;
-    }
-  }
-
-  void OnDown() {
-    switch (this->direction) {
-      case Direction::Down:
-        this->value() += this->increment();
-        break;
-      case Direction::Up:
-        this->value() -= this->increment();
-        break;
-      case Direction::Left:
-      case Direction::Right:
-        break;
     }
   }
 
@@ -110,16 +80,16 @@ class SliderBase : public SliderOption<T>, public ComponentBase {
 
     T old_value = this->value();
     if (event == Event::ArrowLeft || event == Event::Character('h')) {
-      OnLeft();
+      OnDirection(Direction::Left);
     }
     if (event == Event::ArrowRight || event == Event::Character('l')) {
-      OnRight();
+      OnDirection(Direction::Right);
     }
     if (event == Event::ArrowUp || event == Event::Character('k')) {
-      OnDown();
+      OnDirection(Direction::Up);
     }
     if (event == Event::ArrowDown || event == Event::Character('j')) {
-      OnUp();
+      OnDirection(Direction::Down);
     }
 
     this->value() = std::max(this->min(), std::min(this->max(), this->value()));

src/ftxui/component/task.cpp

@@ -0,0 +1,19 @@
+// Copyright 2024 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/task_internal.hpp"
+
+namespace ftxui::task {
+bool PendingTask::operator<(const PendingTask& other) const {
+  if (!time && !other.time) {
+    return false;
+  }
+  if (!time) {
+    return true;
+  }
+  if (!other.time) {
+    return false;
+  }
+  return time.value() > other.time.value();
+}
+}  // namespace ftxui::task

src/ftxui/component/task_internal.hpp

@@ -0,0 +1,40 @@
+// Copyright 2024 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 TASK_HPP
+#define TASK_HPP
+
+#include <chrono>
+#include <functional>
+#include <optional>
+
+namespace ftxui::task {
+
+/// A task represents a unit of work.
+using Task = std::function<void()>;
+
+/// A PendingTask represents a task that is scheduled to be executed at a
+/// specific time, or as soon as possible.
+struct PendingTask {
+  // Immediate task:
+  PendingTask(Task t) : task(std::move(t)) {}  // NOLINT
+
+  // Delayed task with a duration
+  PendingTask(Task t, std::chrono::steady_clock::duration duration)
+      : task(std::move(t)), time(std::chrono::steady_clock::now() + duration) {}
+
+  /// The task to be executed.
+  Task task;
+
+  /// The time when the task should be executed. If the time is empty, the task
+  /// should be executed as soon as possible.
+  std::optional<std::chrono::steady_clock::time_point> time;
+
+  /// Compare two PendingTasks by their time.
+  /// If both tasks have no time, they are considered equal.
+  bool operator<(const PendingTask& other) const;
+};
+
+}  // namespace ftxui::task
+
+#endif  // TASK_HPP_

src/ftxui/component/task_queue.cpp

@@ -0,0 +1,53 @@
+// Copyright 2024 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/task_queue.hpp"
+
+namespace ftxui::task {
+
+auto TaskQueue::PostTask(PendingTask task) -> void {
+  if (!task.time) {
+    immediate_tasks_.push(task);
+    return;
+  }
+
+  if (task.time.value() < std::chrono::steady_clock::now()) {
+    immediate_tasks_.push(task);
+    return;
+  }
+
+  delayed_tasks_.push(task);
+}
+
+auto TaskQueue::Get() -> MaybeTask {
+  // Attempt to execute a task immediately.
+  if (!immediate_tasks_.empty()) {
+    auto task = immediate_tasks_.front();
+    immediate_tasks_.pop();
+    return task.task;
+  }
+
+  // Move all tasks that can be executed to the immediate queue.
+  auto now = std::chrono::steady_clock::now();
+  while (!delayed_tasks_.empty() && delayed_tasks_.top().time.value() <= now) {
+    immediate_tasks_.push(delayed_tasks_.top());
+    delayed_tasks_.pop();
+  }
+
+  // Attempt to execute a task immediately.
+  if (!immediate_tasks_.empty()) {
+    auto task = immediate_tasks_.front();
+    immediate_tasks_.pop();
+    return task.task;
+  }
+
+  // If there are no tasks to execute, return the delay until the next task.
+  if (!delayed_tasks_.empty()) {
+    return delayed_tasks_.top().time.value() - now;
+  }
+
+  // If there are no tasks to execute, return the maximum duration.
+  return std::monostate{};
+}
+
+}  // namespace ftxui::task

src/ftxui/component/task_queue.hpp

@@ -0,0 +1,37 @@
+// Copyright 2024 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 TASK_QUEUE_HPP
+#define TASK_QUEUE_HPP
+
+#include <queue>
+#include <variant>
+
+#include "ftxui/component/task_internal.hpp"  // for PendingTask, Task
+
+namespace ftxui::task {
+
+/// A task queue that schedules tasks to be executed in the future. Tasks can be
+/// scheduled to be executed immediately, or after a certain duration.
+/// - The tasks are executed in the order they were scheduled.
+/// - If multiple tasks are scheduled to be executed at the same time, they are
+///   executed in the order they were scheduled.
+/// - If a task is scheduled to be executed in the past, it is executed
+///   immediately.
+struct TaskQueue {
+  auto PostTask(PendingTask task) -> void;
+
+  using MaybeTask =
+      std::variant<Task, std::chrono::steady_clock::duration, std::monostate>;
+  auto Get() -> MaybeTask;
+
+  bool HasImmediateTasks() const { return !immediate_tasks_.empty(); }
+
+ private:
+  std::queue<PendingTask> immediate_tasks_;
+  std::priority_queue<PendingTask> delayed_tasks_;
+};
+
+}  // namespace ftxui::task
+
+#endif

src/ftxui/component/task_runner.cpp

@@ -0,0 +1,75 @@
+// Copyright 2024 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/task_runner.hpp"
+
+#include <cassert>
+#include <thread>
+
+namespace ftxui::task {
+
+static thread_local TaskRunner* current_task_runner = nullptr;  // NOLINT
+
+TaskRunner::TaskRunner() {
+  assert(!previous_task_runner_);
+  previous_task_runner_ = current_task_runner;
+  current_task_runner = this;
+}
+
+TaskRunner::~TaskRunner() {
+  current_task_runner = previous_task_runner_;
+}
+
+// static
+auto TaskRunner::Current() -> TaskRunner* {
+  assert(current_task_runner);
+  return current_task_runner;
+}
+
+auto TaskRunner::PostTask(Task task) -> void {
+  queue_.PostTask(PendingTask{std::move(task)});
+}
+
+auto TaskRunner::PostDelayedTask(Task task,
+                                 std::chrono::steady_clock::duration duration)
+    -> void {
+  queue_.PostTask(PendingTask{std::move(task), duration});
+}
+
+/// Runs the tasks in the queue.
+auto TaskRunner::RunUntilIdle()
+    -> std::optional<std::chrono::steady_clock::duration> {
+  while (true) {
+    auto maybe_task = queue_.Get();
+    if (std::holds_alternative<std::monostate>(maybe_task)) {
+      // No more tasks to execute, exit the loop.
+      return std::nullopt;
+    }
+
+    if (std::holds_alternative<Task>(maybe_task)) {
+      executed_tasks_++;
+      std::get<Task>(maybe_task)();
+      continue;
+    }
+
+    if (std::holds_alternative<std::chrono::steady_clock::duration>(
+            maybe_task)) {
+      return std::get<std::chrono::steady_clock::duration>(maybe_task);
+    }
+  }
+}
+
+auto TaskRunner::Run() -> void {
+  while (true) {
+    auto duration = RunUntilIdle();
+    if (!duration) {
+      // No more tasks to execute, exit the loop.
+      return;
+    }
+
+    // Sleep for the duration until the next task can be executed.
+    std::this_thread::sleep_for(duration.value());
+  }
+}
+
+}  // namespace ftxui::task

src/ftxui/component/task_runner.hpp

@@ -0,0 +1,46 @@
+// Copyright 2024 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 TASK_RUNNER_HPP
+#define TASK_RUNNER_HPP
+
+#include "ftxui/component/task_internal.hpp"
+#include "ftxui/component/task_queue.hpp"
+
+namespace ftxui::task {
+
+class TaskRunner {
+ public:
+  TaskRunner();
+  ~TaskRunner();
+
+  // Returns the task runner for the current thread.
+  static auto Current() -> TaskRunner*;
+
+  /// Schedules a task to be executed immediately.
+  auto PostTask(Task task) -> void;
+
+  /// Schedules a task to be executed after a certain duration.
+  auto PostDelayedTask(Task task, std::chrono::steady_clock::duration duration)
+      -> void;
+
+  /// Runs the tasks in the queue, return the delay until the next delayed task
+  /// can be executed.
+  auto RunUntilIdle() -> std::optional<std::chrono::steady_clock::duration>;
+
+  // Runs the tasks in the queue, blocking until all tasks are executed.
+  auto Run() -> void;
+
+  bool HasImmediateTasks() const { return queue_.HasImmediateTasks(); }
+
+  size_t ExecutedTasks() const { return executed_tasks_; }
+
+ private:
+  TaskRunner* previous_task_runner_ = nullptr;
+  TaskQueue queue_;
+  size_t executed_tasks_ = 0;
+};
+
+}  // namespace ftxui::task
+
+#endif  // TASK_RUNNER_HPP

src/ftxui/component/task_test.cpp

@@ -0,0 +1,94 @@
+// Copyright 2024 Arthur Sonzogni. All rights reserved.
+// Use of this source code is governed by the MIT license that can be found in
+// the LICENSE file.
+// Copyright 2024 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/task_internal.hpp"
+
+#include <gtest/gtest.h>
+
+#include <thread>  // for sleep_for
+#include "ftxui/component/task_runner.hpp"
+
+namespace ftxui::task {
+
+TEST(TaskTest, Basic) {
+  std::vector<int> values;
+
+  auto task_1 = [&values] { values.push_back(1); };
+  auto task_2 = [&values] { values.push_back(2); };
+  auto task_3 = [&values] { values.push_back(3); };
+
+  auto runner = TaskRunner();
+
+  runner.PostTask(task_1);
+  runner.PostTask(task_2);
+  runner.PostTask(task_3);
+  while (true) {
+    auto duration = runner.RunUntilIdle();
+    if (!duration) {
+      break;
+    }
+    std::this_thread::sleep_for(duration.value());
+  }
+
+  EXPECT_EQ(values, (std::vector<int>{1, 2, 3}));
+}
+
+TEST(TaskTest, PostedWithinTask) {
+  std::vector<int> values;
+
+  auto task_1 = [&values] {
+    values.push_back(1);
+    auto task_2 = [&values] { values.push_back(5); };
+    TaskRunner::Current()->PostTask(std::move(task_2));
+    values.push_back(2);
+  };
+
+  auto task_2 = [&values] {
+    values.push_back(3);
+    auto task_2 = [&values] { values.push_back(6); };
+    TaskRunner::Current()->PostTask(std::move(task_2));
+    values.push_back(4);
+  };
+
+  auto runner = TaskRunner();
+
+  runner.PostTask(task_1);
+  runner.PostTask(task_2);
+  while (true) {
+    auto duration = runner.RunUntilIdle();
+    if (!duration) {
+      break;
+    }
+    std::this_thread::sleep_for(duration.value());
+  }
+
+  EXPECT_EQ(values, (std::vector<int>{1, 2, 3, 4, 5, 6}));
+}
+
+TEST(TaskTest, RunDelayedTask) {
+  std::vector<int> values;
+
+  auto task_1 = [&values] { values.push_back(1); };
+  auto task_2 = [&values] { values.push_back(2); };
+  auto task_3 = [&values] { values.push_back(3); };
+
+  auto runner = TaskRunner();
+
+  runner.PostDelayedTask(task_3, std::chrono::milliseconds(300));
+  runner.PostDelayedTask(task_1, std::chrono::milliseconds(100));
+  runner.PostDelayedTask(task_2, std::chrono::milliseconds(200));
+  while (true) {
+    auto duration = runner.RunUntilIdle();
+    if (!duration) {
+      break;
+    }
+    std::this_thread::sleep_for(duration.value());
+  }
+
+  EXPECT_EQ(values, (std::vector<int>{1, 2, 3}));
+}
+
+}  // namespace ftxui::task

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;
 
@@ -140,25 +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
+      out_(Event::CursorPosition(std::move(pending_),  // NOLINT
-                                       output.cursor.x,      // NOLINT
+                                 output.cursor.x,      // NOLINT
-                                       output.cursor.y));    // NOLINT
+                                 output.cursor.y));    // NOLINT
       pending_.clear();
       return;
 
     case CURSOR_SHAPE:
-      out_->Send(Event::CursorShape(std::move(pending_), output.cursor_shape));
+      out_(Event::CursorShape(std::move(pending_), output.cursor_shape));
       pending_.clear();
       return;
   }

src/ftxui/component/terminal_input_parser.hpp

@@ -4,12 +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/mouse.hpp"  // for Mouse
-#include "ftxui/component/receiver.hpp"  // for Sender
-#include "ftxui/component/task.hpp"      // for Task
 
 namespace ftxui {
 struct Event;
@@ -17,7 +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);
 
@@ -62,7 +61,7 @@ class TerminalInputParser {
   Output ParseMouse(bool altered, bool pressed, std::vector<int> arguments);
   Output ParseCursorPosition(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
 
@@ -17,233 +17,205 @@ namespace ftxui {
 // Test char |c| to are trivially converted into |Event::Character(c)|.
 TEST(Event, Character) {
   std::vector<char> basic_char;
-  for (char c = 'a'; c <= 'z'; ++c)
+  for (char c = 'a'; c <= 'z'; ++c) {
     basic_char.push_back(c);
-  for (char c = 'A'; c <= 'Z'; ++c)
+  }
+  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);
   }
 
-  Task received;
+  std::vector<Event> received_events;
+  auto parser = TerminalInputParser(
+      [&](Event event) { received_events.push_back(std::move(event)); });
   for (char c : basic_char) {
-    EXPECT_TRUE(event_receiver->Receive(&received));
+    parser.Add(c);
-    EXPECT_TRUE(std::get<Event>(received).is_character());
-    EXPECT_EQ(c, std::get<Event>(received).character()[0]);
   }
-  EXPECT_FALSE(event_receiver->Receive(&received));
+
+  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_EQ(received_events.size(), basic_char.size());
 }
 
 TEST(Event, EscapeKeyWithoutWaiting) {
-  auto event_receiver = MakeReceiver<Task>();
+  std::vector<Event> received_events;
-  {
+  auto parser = TerminalInputParser(
-    auto parser = TerminalInputParser(event_receiver->MakeSender());
+      [&](Event event) { received_events.push_back(std::move(event)); });
-    parser.Add('\x1B');
+  parser.Add('');
-  }
 
-  Task received;
+  EXPECT_TRUE(received_events.empty());
-  EXPECT_FALSE(event_receiver->Receive(&received));
 }
 
 TEST(Event, EscapeKeyNotEnoughWait) {
-  auto event_receiver = MakeReceiver<Task>();
+  std::vector<Event> received_events;
-  {
+  auto parser = TerminalInputParser(
-    auto parser = TerminalInputParser(event_receiver->MakeSender());
+      [&](Event event) { received_events.push_back(std::move(event)); });
-    parser.Add('\x1B');
+  parser.Add('');
-    parser.Timeout(49);
+  parser.Timeout(49);
-  }
 
-  Task received;
+  EXPECT_TRUE(received_events.empty());
-  EXPECT_FALSE(event_receiver->Receive(&received));
 }
 
 TEST(Event, EscapeKeyEnoughWait) {
-  auto event_receiver = MakeReceiver<Task>();
+  std::vector<Event> received_events;
-  {
+  auto parser = TerminalInputParser(
-    auto parser = TerminalInputParser(event_receiver->MakeSender());
+      [&](Event event) { received_events.push_back(std::move(event)); });
-    parser.Add('\x1B');
+  parser.Add('');
-    parser.Timeout(50);
+  parser.Timeout(50);
-  }
 
-  Task received;
+  EXPECT_EQ(1, received_events.size());
-  EXPECT_TRUE(event_receiver->Receive(&received));
+  EXPECT_EQ(received_events[0], Event::Escape);
-  EXPECT_EQ(std::get<Event>(received), Event::Escape);
-  EXPECT_FALSE(event_receiver->Receive(&received));
 }
 
 TEST(Event, EscapeFast) {
-  auto event_receiver = MakeReceiver<Task>();
+  std::vector<Event> received_events;
-  {
+  auto parser = TerminalInputParser(
-    auto parser = TerminalInputParser(event_receiver->MakeSender());
+      [&](Event event) { received_events.push_back(std::move(event)); });
-    parser.Add('\x1B');
+  parser.Add('');
-    parser.Add('a');
+  parser.Add('a');
-    parser.Add('\x1B');
+  parser.Add('');
-    parser.Add('b');
+  parser.Add('b');
-    parser.Timeout(49);
+  parser.Timeout(49);
-  }
+
-  Task received;
+  EXPECT_EQ(2, received_events.size());
-  EXPECT_TRUE(event_receiver->Receive(&received));
+  EXPECT_EQ(received_events[0], Event::AltA);
-  EXPECT_EQ(std::get<Event>(received), Event::AltA);
+  EXPECT_EQ(received_events[1], Event::AltB);
-  EXPECT_TRUE(event_receiver->Receive(&received));
-  EXPECT_EQ(std::get<Event>(received), Event::AltB);
-  EXPECT_FALSE(event_receiver->Receive(&received));
 }
 
 TEST(Event, MouseLeftClickPressed) {
-  auto event_receiver = MakeReceiver<Task>();
+  std::vector<Event> received_events;
-  {
+  auto parser = TerminalInputParser(
-    auto parser = TerminalInputParser(event_receiver->MakeSender());
+      [&](Event event) { received_events.push_back(std::move(event)); });
-    parser.Add('\x1B');
+  parser.Add('');
-    parser.Add('[');
+  parser.Add('[');
-    parser.Add('0');
+  parser.Add('0');
-    parser.Add(';');
+  parser.Add(';');
-    parser.Add('1');
+  parser.Add('1');
-    parser.Add('2');
+  parser.Add('2');
-    parser.Add(';');
+  parser.Add(';');
-    parser.Add('4');
+  parser.Add('4');
-    parser.Add('2');
+  parser.Add('2');
-    parser.Add('M');
+  parser.Add('M');
-  }
 
-  Task received;
+  EXPECT_EQ(1, received_events.size());
-  EXPECT_TRUE(event_receiver->Receive(&received));
+  EXPECT_TRUE(received_events[0].is_mouse());
-  EXPECT_TRUE(std::get<Event>(received).is_mouse());
+  EXPECT_EQ(Mouse::Left, received_events[0].mouse().button);
-  EXPECT_EQ(Mouse::Left, std::get<Event>(received).mouse().button);
+  EXPECT_EQ(12, received_events[0].mouse().x);
-  EXPECT_EQ(12, std::get<Event>(received).mouse().x);
+  EXPECT_EQ(42, received_events[0].mouse().y);
-  EXPECT_EQ(42, std::get<Event>(received).mouse().y);
+  EXPECT_EQ(received_events[0].mouse().motion, Mouse::Pressed);
-  EXPECT_EQ(std::get<Event>(received).mouse().motion, Mouse::Pressed);
-  EXPECT_FALSE(event_receiver->Receive(&received));
 }
 
 TEST(Event, MouseLeftMoved) {
-  auto event_receiver = MakeReceiver<Task>();
+  std::vector<Event> received_events;
-  {
+  auto parser = TerminalInputParser(
-    auto parser = TerminalInputParser(event_receiver->MakeSender());
+      [&](Event event) { received_events.push_back(std::move(event)); });
-    parser.Add('\x1B');
+  parser.Add('');
-    parser.Add('[');
+  parser.Add('[');
-    parser.Add('3');
+  parser.Add('3');
-    parser.Add('2');
+  parser.Add('2');
-    parser.Add(';');
+  parser.Add(';');
-    parser.Add('1');
+  parser.Add('1');
-    parser.Add('2');
+  parser.Add('2');
-    parser.Add(';');
+  parser.Add(';');
-    parser.Add('4');
+  parser.Add('4');
-    parser.Add('2');
+  parser.Add('2');
-    parser.Add('M');
+  parser.Add('M');
-  }
 
-  Task received;
+  EXPECT_EQ(1, received_events.size());
-  EXPECT_TRUE(event_receiver->Receive(&received));
+  EXPECT_TRUE(received_events[0].is_mouse());
-  EXPECT_TRUE(std::get<Event>(received).is_mouse());
+  EXPECT_EQ(Mouse::Left, received_events[0].mouse().button);
-  EXPECT_EQ(Mouse::Left, std::get<Event>(received).mouse().button);
+  EXPECT_EQ(12, received_events[0].mouse().x);
-  EXPECT_EQ(12, std::get<Event>(received).mouse().x);
+  EXPECT_EQ(42, received_events[0].mouse().y);
-  EXPECT_EQ(42, std::get<Event>(received).mouse().y);
+  EXPECT_EQ(received_events[0].mouse().motion, Mouse::Moved);
-  EXPECT_EQ(std::get<Event>(received).mouse().motion, Mouse::Moved);
-  EXPECT_FALSE(event_receiver->Receive(&received));
 }
 
 TEST(Event, MouseLeftClickReleased) {
-  auto event_receiver = MakeReceiver<Task>();
+  std::vector<Event> received_events;
-  {
+  auto parser = TerminalInputParser(
-    auto parser = TerminalInputParser(event_receiver->MakeSender());
+      [&](Event event) { received_events.push_back(std::move(event)); });
-    parser.Add('\x1B');
+  parser.Add('');
-    parser.Add('[');
+  parser.Add('[');
-    parser.Add('0');
+  parser.Add('0');
-    parser.Add(';');
+  parser.Add(';');
-    parser.Add('1');
+  parser.Add('1');
-    parser.Add('2');
+  parser.Add('2');
-    parser.Add(';');
+  parser.Add(';');
-    parser.Add('4');
+  parser.Add('4');
-    parser.Add('2');
+  parser.Add('2');
-    parser.Add('m');
+  parser.Add('m');
-  }
 
-  Task received;
+  EXPECT_EQ(1, received_events.size());
-  EXPECT_TRUE(event_receiver->Receive(&received));
+  EXPECT_TRUE(received_events[0].is_mouse());
-  EXPECT_TRUE(std::get<Event>(received).is_mouse());
+  EXPECT_EQ(Mouse::Left, received_events[0].mouse().button);
-  EXPECT_EQ(Mouse::Left, std::get<Event>(received).mouse().button);
+  EXPECT_EQ(12, received_events[0].mouse().x);
-  EXPECT_EQ(12, std::get<Event>(received).mouse().x);
+  EXPECT_EQ(42, received_events[0].mouse().y);
-  EXPECT_EQ(42, std::get<Event>(received).mouse().y);
+  EXPECT_EQ(received_events[0].mouse().motion, Mouse::Released);
-  EXPECT_EQ(std::get<Event>(received).mouse().motion, Mouse::Released);
-  EXPECT_FALSE(event_receiver->Receive(&received));
 }
 
 TEST(Event, MouseReporting) {
-  auto event_receiver = MakeReceiver<Task>();
+  std::vector<Event> received_events;
-  {
+  auto parser = TerminalInputParser(
-    auto parser = TerminalInputParser(event_receiver->MakeSender());
+      [&](Event event) { received_events.push_back(std::move(event)); });
-    parser.Add('\x1B');
+  parser.Add('');
-    parser.Add('[');
+  parser.Add('[');
-    parser.Add('1');
+  parser.Add('1');
-    parser.Add('2');
+  parser.Add('2');
-    parser.Add(';');
+  parser.Add(';');
-    parser.Add('4');
+  parser.Add('4');
-    parser.Add('2');
+  parser.Add('2');
-    parser.Add('R');
+  parser.Add('R');
-  }
 
-  Task received;
+  EXPECT_EQ(1, received_events.size());
-  EXPECT_TRUE(event_receiver->Receive(&received));
+  EXPECT_TRUE(received_events[0].is_cursor_position());
-  EXPECT_TRUE(std::get<Event>(received).is_cursor_position());
+  EXPECT_EQ(42, received_events[0].cursor_x());
-  EXPECT_EQ(42, std::get<Event>(received).cursor_x());
+  EXPECT_EQ(12, received_events[0].cursor_y());
-  EXPECT_EQ(12, std::get<Event>(received).cursor_y());
-  EXPECT_FALSE(event_receiver->Receive(&received));
 }
 
 TEST(Event, MouseMiddleClick) {
-  auto event_receiver = MakeReceiver<Task>();
+  std::vector<Event> received_events;
-  {
+  auto parser = TerminalInputParser(
-    auto parser = TerminalInputParser(event_receiver->MakeSender());
+      [&](Event event) { received_events.push_back(std::move(event)); });
-    parser.Add('\x1B');
+  parser.Add('');
-    parser.Add('[');
+  parser.Add('[');
-    parser.Add('3');
+  parser.Add('3');
-    parser.Add('3');
+  parser.Add('3');
-    parser.Add(';');
+  parser.Add(';');
-    parser.Add('1');
+  parser.Add('1');
-    parser.Add('2');
+  parser.Add('2');
-    parser.Add(';');
+  parser.Add(';');
-    parser.Add('4');
+  parser.Add('4');
-    parser.Add('2');
+  parser.Add('2');
-    parser.Add('M');
+  parser.Add('M');
-  }
 
-  Task received;
+  EXPECT_EQ(1, received_events.size());
-  EXPECT_TRUE(event_receiver->Receive(&received));
+  EXPECT_TRUE(received_events[0].is_mouse());
-  EXPECT_TRUE(std::get<Event>(received).is_mouse());
+  EXPECT_EQ(Mouse::Middle, received_events[0].mouse().button);
-  EXPECT_EQ(Mouse::Middle, std::get<Event>(received).mouse().button);
+  EXPECT_EQ(12, received_events[0].mouse().x);
-  EXPECT_EQ(12, std::get<Event>(received).mouse().x);
+  EXPECT_EQ(42, received_events[0].mouse().y);
-  EXPECT_EQ(42, std::get<Event>(received).mouse().y);
-  EXPECT_FALSE(event_receiver->Receive(&received));
 }
 
 TEST(Event, MouseRightClick) {
-  auto event_receiver = MakeReceiver<Task>();
+  std::vector<Event> received_events;
-  {
+  auto parser = TerminalInputParser(
-    auto parser = TerminalInputParser(event_receiver->MakeSender());
+      [&](Event event) { received_events.push_back(std::move(event)); });
-    parser.Add('\x1B');
+  parser.Add('');
-    parser.Add('[');
+  parser.Add('[');
-    parser.Add('3');
+  parser.Add('3');
-    parser.Add('4');
+  parser.Add('4');
-    parser.Add(';');
+  parser.Add(';');
-    parser.Add('1');
+  parser.Add('1');
-    parser.Add('2');
+  parser.Add('2');
-    parser.Add(';');
+  parser.Add(';');
-    parser.Add('4');
+  parser.Add('4');
-    parser.Add('2');
+  parser.Add('2');
-    parser.Add('M');
+  parser.Add('M');
-  }
 
-  Task received;
+  EXPECT_EQ(1, received_events.size());
-  EXPECT_TRUE(event_receiver->Receive(&received));
+  EXPECT_TRUE(received_events[0].is_mouse());
-  EXPECT_TRUE(std::get<Event>(received).is_mouse());
+  EXPECT_EQ(Mouse::Right, received_events[0].mouse().button);
-  EXPECT_EQ(Mouse::Right, std::get<Event>(received).mouse().button);
+  EXPECT_EQ(12, received_events[0].mouse().x);
-  EXPECT_EQ(12, std::get<Event>(received).mouse().x);
+  EXPECT_EQ(42, received_events[0].mouse().y);
-  EXPECT_EQ(42, std::get<Event>(received).mouse().y);
-  EXPECT_FALSE(event_receiver->Receive(&received));
 }
 
 TEST(Event, UTF8) {
@@ -313,31 +285,30 @@ TEST(Event, UTF8) {
 
   };
   for (auto test : kTestCase) {
-    auto event_receiver = MakeReceiver<Task>();
+    std::vector<Event> received_events;
-    {
+    auto parser = TerminalInputParser(
-      auto parser = TerminalInputParser(event_receiver->MakeSender());
+        [&](Event event) { received_events.push_back(std::move(event)); });
-      for (auto input : test.input)
+    for (auto input : test.input) {
-        parser.Add(input);
+      parser.Add(input);
     }
-    Task received;
+
     if (test.valid) {
-      EXPECT_TRUE(event_receiver->Receive(&received));
+      EXPECT_EQ(1, received_events.size());
-      EXPECT_TRUE(std::get<Event>(received).is_character());
+      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>();
+    std::vector<Event> received_events;
-    {
+    auto parser = TerminalInputParser(
-      auto parser = TerminalInputParser(event_receiver->MakeSender());
+        [&](Event event) { received_events.push_back(std::move(event)); });
-      parser.Add(newline);
+    parser.Add(newline);
-    }
+    EXPECT_EQ(1, received_events.size());
-    Task received;
+    EXPECT_TRUE(received_events[0] == Event::Return);
-    EXPECT_TRUE(event_receiver->Receive(&received));
-    EXPECT_TRUE(std::get<Event>(received) == Event::Return);
   }
 }
 
@@ -348,8 +319,9 @@ TEST(Event, Control) {
   };
   std::vector<TestCase> cases;
   for (int i = 0; i < 32; ++i) {
-    if (i == 8 || i == 13 || i == 24 || i == 26 || i == 27)
+    if (i == 8 || i == 13 || i == 24 || i == 26 || i == 27) {
       continue;
+    }
     cases.push_back({char(i), false});
   }
   cases.push_back({char(24), false});
@@ -357,17 +329,16 @@ TEST(Event, Control) {
   cases.push_back({char(127), false});
 
   for (auto test : cases) {
-    auto event_receiver = MakeReceiver<Task>();
+    std::vector<Event> received_events;
-    {
+    auto parser = TerminalInputParser(
-      auto parser = TerminalInputParser(event_receiver->MakeSender());
+        [&](Event event) { received_events.push_back(std::move(event)); });
-      parser.Add(test.input);
+    parser.Add(test.input);
-    }
+
-    Task received;
     if (test.cancel) {
-      EXPECT_FALSE(event_receiver->Receive(&received));
+      EXPECT_TRUE(received_events.empty());
     } else {
-      EXPECT_TRUE(event_receiver->Receive(&received));
+      EXPECT_EQ(1, received_events.size());
-      EXPECT_EQ(std::get<Event>(received), Event::Special({test.input}));
+      EXPECT_EQ(received_events[0], Event::Special({test.input}));
     }
   }
 }
@@ -375,8 +346,9 @@ TEST(Event, Control) {
 TEST(Event, Special) {
   auto str = [](std::string input) {
     std::vector<unsigned char> output;
-    for (auto it : input)
+    for (auto it : input) {
       output.push_back(it);
+    }
     return output;
   };
 
@@ -385,10 +357,12 @@ TEST(Event, Special) {
     Event expected;
   } kTestCase[] = {
       // Arrow (default cursor mode)
-      {str("\x1B[A"), Event::ArrowUp},    {str("\x1B[B"), Event::ArrowDown},
+      {str(""), Event::ArrowUp},
-      {str("\x1B[C"), Event::ArrowRight}, {str("\x1B[D"), Event::ArrowLeft},
+      {str(""), Event::ArrowDown},
-      {str("\x1B[H"), Event::Home},       {str("\x1B[F"), Event::End},
+      {str(""), Event::ArrowRight},
-      /*
+      {str(""), Event::ArrowLeft},
+      {str(""), Event::Home},
+      {str(""), Event::End},
 
       // Arrow (application cursor mode)
       {str("\x1BOA"), Event::ArrowUp},
@@ -469,45 +443,38 @@ TEST(Event, Special) {
 
       // Custom:
       {{0}, Event::Custom},
-      */
   };
 
   for (auto test : kTestCase) {
-    auto event_receiver = MakeReceiver<Task>();
+    std::vector<Event> received_events;
-    {
+    auto parser = TerminalInputParser(
-      auto parser = TerminalInputParser(event_receiver->MakeSender());
+        [&](Event event) { received_events.push_back(std::move(event)); });
-      for (auto input : test.input) {
+    for (auto input : test.input) {
-        parser.Add(input);
+      parser.Add(input);
-      }
     }
-    Task received;
+    EXPECT_EQ(1, received_events.size());
-    EXPECT_TRUE(event_receiver->Receive(&received));
+    EXPECT_EQ(received_events[0], test.expected);
-    EXPECT_EQ(std::get<Event>(received), test.expected);
-    EXPECT_FALSE(event_receiver->Receive(&received));
   }
 }
 
 TEST(Event, DeviceControlString) {
-  auto event_receiver = MakeReceiver<Task>();
+  std::vector<Event> received_events;
-  {
+  auto parser = TerminalInputParser(
-    auto parser = TerminalInputParser(event_receiver->MakeSender());
+      [&](Event event) { received_events.push_back(std::move(event)); });
-    parser.Add(27);   // ESC
+  parser.Add(27);   // ESC
-    parser.Add(80);   // P
+  parser.Add(80);   // P
-    parser.Add(49);   // 1
+  parser.Add(49);   // 1
-    parser.Add(36);   // $
+  parser.Add(36);   // $
-    parser.Add(114);  // r
+  parser.Add(114);  // r
-    parser.Add(49);   // 1
+  parser.Add(49);   // 1
-    parser.Add(32);   // SP
+  parser.Add(32);   // SP
-    parser.Add(113);  // q
+  parser.Add(113);  // q
-    parser.Add(27);   // ESC
+  parser.Add(27);   // ESC
-    parser.Add(92);   // (backslash)
+  parser.Add(92);   // (backslash)
-  }
 
-  Task received;
+  EXPECT_EQ(1, received_events.size());
-  EXPECT_TRUE(event_receiver->Receive(&received));
+  EXPECT_TRUE(received_events[0].is_cursor_shape());
-  EXPECT_TRUE(std::get<Event>(received).is_cursor_shape());
+  EXPECT_EQ(1, received_events[0].cursor_shape());
-  EXPECT_EQ(1, std::get<Event>(received).cursor_shape());
-  EXPECT_FALSE(event_receiver->Receive(&received));
 }
 
 }  // 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) {});
-  {
+  for (size_t i = 0; i < size; ++i) {
-    auto parser = TerminalInputParser(event_receiver->MakeSender());
+    parser.Add(data[i]);
-    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.
 }

src/ftxui/dom/size.cpp

@@ -81,7 +81,7 @@ class Size : public Node {
 }  // namespace
 
 /// @brief Apply a constraint on the size of an element.
-/// @param direction Whether the WIDTH of the HEIGHT of the element must be
+/// @param direction Whether the WIDTH or the HEIGHT of the element must be
 ///                  constrained.
 /// @param constraint The type of constaint.
 /// @param value The value.

src/ftxui/screen/screen.cpp

@@ -47,8 +47,9 @@ namespace {
 #if defined(_WIN32)
 void WindowsEmulateVT100Terminal() {
   static bool done = false;
-  if (done)
+  if (done) {
     return;
+  }
   done = true;
 
   // Enable VT processing on stdout and stdin

src/ftxui/screen/string.cpp

@@ -1284,8 +1284,9 @@ bool IsCombining(uint32_t ucs) {
 }
 
 bool IsFullWidth(uint32_t ucs) {
-  if (ucs < 0x0300)  // Quick path: // NOLINT
+  if (ucs < 0x0300) {  // Quick path: // NOLINT
     return false;
+  }
 
   return Bisearch(ucs, g_full_width_characters);
 }

tools/license_headers.cpp

@@ -1,4 +1,4 @@
-// Copyright 2024 Arthur Sonzogni. All rights reserved.
+// 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.