Tweak implementation and documentation.

Enables applications to read piped data while maintaining interactive
keyboard input by redirecting stdin to /dev/tty when explicitly enabled.

.gitignore

@@ -44,6 +44,7 @@ out/
 !doc/**/*.html
 !doc/**/*.xml
 !doc/**/*.md
+!doc/*.md
 
 # examples directory:
 !examples/**/*.cpp

BUILD.bazel

@@ -169,15 +169,13 @@ ftxui_cc_library(
         "src/ftxui/component/util.cpp",
         "src/ftxui/component/window.cpp",
 
+
         # Private header from ftxui:dom.
         "src/ftxui/dom/node_decorator.hpp",
 
         # 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",

CHANGELOG.md

@@ -29,8 +29,6 @@ Next
 ### 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

@@ -178,8 +178,8 @@ include(cmake/ftxui_install.cmake)
 include(cmake/ftxui_package.cmake)
 include(cmake/ftxui_modules.cmake)
 
-add_subdirectory(examples)
 add_subdirectory(doc)
+add_subdirectory(examples)
 
 # You can generate ./examples_modules/ by running
 # ./tools/generate_examples_modules.sh

README.md

@@ -1,4 +1,3 @@
-
 <p align="center">
   <img src="https://github.com/ArthurSonzogni/FTXUI/assets/4759106/6925b6da-0a7e-49d9-883c-c890e1f36007" alt="Demo image"></img>
   <br/>
@@ -363,8 +362,6 @@ 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)
 
@@ -381,6 +378,8 @@ Several games using the FTXUI have been made during the Game Jam:
 - [smoothlife](https://github.com/cpp-best-practices/game_jam/blob/main/Jam1_April_2022/smoothlife.md)
 - [Consu](https://github.com/cpp-best-practices/game_jam/blob/main/Jam1_April_2022/consu.md)
 
+
+
 ## Build using CMake
 
 It is **highly** recommended to use CMake FetchContent to depend on FTXUI so you may specify which commit you would like to depend on.

build/_deps/googlebenchmark-subbuild/CMakeLists.txt

@@ -1,42 +0,0 @@
-# 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

@@ -1,42 +0,0 @@
-# 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

@@ -11,9 +11,6 @@ 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(

doc/installation_conan.md

@@ -1,99 +1,19 @@
 @page installation_conan Conan
-@tableofcontents
 
-FTXUI can be easily obtained and integrated into your project using the Conan package manager.
-
-## 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).
+Unofficial recipe for FTXUI exists on Conan Center:
+<https://conan.io/center/recipes/ftxui>
 
 > [!note]
-> This is an unofficial build script. This means it is not maintained by the FTXUI
-> team but by the community. The package maintainer appears to actively update it
-> to the latest releases. Many thanks to the maintainer for their work!
+> This is an unofficial recipe. That means it is not maintained by the FTXUI
+> team, but by the community. The package maintainers seems to actively update
+> the package to the latest version. Thanks to the maintainers 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.
 
-```ini
-[requires]
-ftxui/6.0.2
+@todo Add instructions on how to use the conan recipe.
 
-[generators]
-CMakeDeps
-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
-
----
+@todo Please consider adding an "official" recipe to Conan Center if know how.
+It could be a github action that will automatically update the conan center
+when a new release is made.
 
 <div class="section_buttons">
  

doc/posix_pipe.md

@@ -0,0 +1,58 @@
+# POSIX Piped Input in FTXUI
+
+> [!WARNING]
+> This feature works only on Linux and macOS. It is not supported on
+> Windows and WebAssembly.
+
+## What is a POSIX Pipe?
+
+A POSIX pipe is a way for two separate programs to communicate. One program sends its output directly as input to another program. Think of it like a one-way tube for data.
+
+**Example:**
+
+Imagine you want to list files and then filter them interactively.
+
+- `ls`: Lists files.
+- `interactive_grep`: An FTXUI application that filters text and lets you type.
+
+You can connect them with a pipe (`|`):
+
+```bash
+ls -l | interactive_grep
+```
+
+Here's what happens:
+1. `ls -l` lists files with details.
+2. The `|` sends this list directly to `interactive_grep`.
+3. `interactive_grep` receives the list and displays it. Because it's an FTXUI app, you can then type to filter the list, even though it received initial data from `ls`.
+
+## How FTXUI Handles Piped Input
+
+Now that you understand what a POSIX pipe is, let's look at how FTXUI uses them.
+
+FTXUI lets your application read data from other programs (like from a pipe) while still allowing you to use your keyboard for interaction. This is useful for interactive command-line tools that process data.
+
+Normally, FTXUI applications receive all input from `stdin`. However, when FTXUI detects that `stdin` is connected to the output of a pipe (meaning data is being piped into your application), it automatically switches to reading interactive keyboard input from `/dev/tty`. This ensures that your application can still receive user input even while processing piped data.
+
+This feature is **turned on by default**.
+
+If your FTXUI application needs to read piped data and also respond to keyboard input, you typically don't need to do anything special:
+
+```cpp
+auto screen = ScreenInteractive::Fullscreen();
+// screen.HandlePipedInput(true); // This is enabled by default
+screen.Loop(component);
+```
+
+
+## Turning Off Piped Input
+
+If you don't need this feature, or if it conflicts with your custom input handling, you can turn it off.
+
+To disable it, call `HandlePipedInput(false)` before starting your application's main loop:
+
+```cpp
+auto screen = ScreenInteractive::Fullscreen();
+screen.HandlePipedInput(false); // Turn off piped input handling
+screen.Loop(component);
+```

examples/CMakeLists.txt

@@ -17,12 +17,10 @@ add_subdirectory(dom)
 if (EMSCRIPTEN)
   get_property(EXAMPLES GLOBAL PROPERTY FTXUI::EXAMPLES)
   foreach(file
-      "index.css"
       "index.html"
       "index.mjs"
-      "run_webassembly.py"
-      "sw.js"
-  )
+      "index.css"
+      "run_webassembly.py")
     configure_file(${file} ${file})
   endforeach(file)
 endif()

examples/component/button.cpp

@@ -34,8 +34,8 @@ 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_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

examples/index.css

@@ -1,9 +1,5 @@
 @import url(https://fonts.googleapis.com/css?family=Khula:700);
 
-html {
-  --toc-width: 250px;
-}
-
 body {
   background-color:#EEE;
   padding:0px;
@@ -45,8 +41,7 @@ h1 {
   flex:1;
 }
 
-#selectExample,
-#selectExample option {
+#selectExample, #selectExample option {
   font-size: 16px;
   font-family: sans-serif;
   font-weight: 700;
@@ -66,8 +61,7 @@ h1 {
   height: calc(clamp(200px, 100vh - 300px, 900px));
   overflow: hidden;
   border:none;
-  padding: 10px;
-  margin: 10px;
+  background-color:black;
 }
 
 #terminalContainer {
@@ -75,7 +69,6 @@ h1 {
   border-radius: 10px;
   box-shadow: 0px 2px 10px 0px rgba(0,0,0,0.75),
   0px 2px 80px 0px rgba(0,0,0,0.50);
-  background-color: black;
 }
 
 .fakeButtons {
@@ -112,69 +105,3 @@ h1 {
   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

@@ -9,18 +9,13 @@
     <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. See <a id="source">source</a>.
+        This showcases the: <a href="https://github.com/ArthurSonzogni/FTXUI/tree/master/examples">./example/</a> folder. <br/>
       </p>
 
       <div id="terminalContainer">

examples/index.mjs

@@ -92,69 +92,6 @@ window.Module = {
   },
 };
 
-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/receiver.hpp

@@ -4,7 +4,7 @@
 #ifndef FTXUI_COMPONENT_RECEIVER_HPP_
 #define FTXUI_COMPONENT_RECEIVER_HPP_
 
-#include <ftxui/util/warn_windows_macro.hpp>
+#include <ftxui/util/warn_windows_macro.h>
 #include <algorithm>           // for copy, max
 #include <atomic>              // for atomic, __atomic_base
 #include <condition_variable>  // for condition_variable

include/ftxui/component/screen_interactive.hpp

@@ -43,10 +43,11 @@ class ScreenInteractive : public Screen {
   static ScreenInteractive TerminalOutput();
 
   // Destructor.
-  ~ScreenInteractive();
+  ~ScreenInteractive() override;
 
   // Options. Must be called before Loop().
   void TrackMouse(bool enable = true);
+  void HandlePipedInput(bool enable = true);
 
   // Return the currently active screen, nullptr if none.
   static ScreenInteractive* Active();
@@ -100,6 +101,8 @@ class ScreenInteractive : public Screen {
   void Draw(Component component);
   void ResetCursorPosition();
 
+  void InstallPipedInputHandling();
+
   void Signal(int signal);
 
   void FetchTerminalEvents();
@@ -117,6 +120,7 @@ class ScreenInteractive : public Screen {
                     int dimx,
                     int dimy,
                     bool use_alternative_screen);
+
   const Dimension dimension_;
   const bool use_alternative_screen_;
 
@@ -141,6 +145,9 @@ class ScreenInteractive : public Screen {
   bool force_handle_ctrl_c_ = true;
   bool force_handle_ctrl_z_ = true;
 
+  // Piped input handling state (POSIX only)
+  bool handle_piped_input_ = true;
+
   // The style of the cursor to restore on exit.
   int cursor_reset_shape_ = 1;
 

include/ftxui/screen/screen.hpp

@@ -60,7 +60,7 @@ class Screen : public Image {
       BarBlinking = 5,
       Bar = 6,
     };
-    Shape shape = Hidden;
+    Shape shape;
   };
 
   Cursor cursor() const { return cursor_; }

src/ftxui/component/screen_interactive.cpp

@@ -372,6 +372,18 @@ void ScreenInteractive::TrackMouse(bool enable) {
   track_mouse_ = enable;
 }
 
+/// @brief Enable or disable automatic piped input handling.
+/// When enabled, FTXUI will detect piped input and redirect stdin from /dev/tty
+/// for keyboard input, allowing applications to read piped data while still
+/// receiving interactive keyboard events.
+/// @param enable Whether to enable piped input handling. Default is true.
+/// @note This must be called before Loop().
+/// @note This feature is enabled by default.
+/// @note This feature is only available on POSIX systems (Linux/macOS).
+void ScreenInteractive::HandlePipedInput(bool enable) {
+  handle_piped_input_ = enable;
+}
+
 /// @brief Add a task to the main loop.
 /// It will be executed later, after every other scheduled tasks.
 void ScreenInteractive::Post(Task task) {
@@ -658,11 +670,55 @@ void ScreenInteractive::Install() {
   // ensure it is fully applied:
   Flush();
 
+  // Redirect the true terminal to stdin, so that we can read keyboard input
+  // directly from stdin, even if the input is piped from a file or another
+  // process.
+  //
+  // TODO: Instead of redirecting stdin, we could define the file descriptor to
+  // read from, and use it in the TerminalInputParser.
+  InstallPipedInputHandling();
+
   quit_ = false;
 
   PostAnimationTask();
 }
 
+void ScreenInteractive::InstallPipedInputHandling() {
+#if !defined(_WIN32) && !defined(__EMSCRIPTEN__)
+  // Handle piped input redirection if explicitly enabled by the application.
+  // This allows applications to read data from stdin while still receiving
+  // keyboard input from the terminal for interactive use.
+  if (!handle_piped_input_) {
+    return;
+  }
+
+  // If stdin is a terminal, we don't need to redirect it.
+  if (isatty(STDIN_FILENO)) {
+    return;
+  }
+
+  // Save the current stdin so we can restore it later.
+  int original_fd = dup(STDIN_FILENO);
+  if (original_fd < 0) {
+    return;
+  }
+
+  // Redirect stdin to the controlling terminal for keyboard input.
+  if (std::freopen("/dev/tty", "r", stdin) == nullptr) {
+    // Failed to open /dev/tty (containers, headless systems, etc.)
+    // Clean up and continue without redirection
+    close(original_fd);
+    return;
+  }
+
+  // Restore the original stdin file descriptor on exit.
+  on_exit_functions.emplace([=] {
+    dup2(original_fd, STDIN_FILENO);
+    close(original_fd);
+  });
+#endif
+}
+
 // private
 void ScreenInteractive::Uninstall() {
   ExitNow();

src/ftxui/component/screen_interactive_piped_input_test.cpp

@@ -0,0 +1,220 @@
+// Copyright 2025 Arthur Sonzogni. All rights reserved.
+// Use of this source code is governed by the MIT license that can be found in
+// the LICENSE file.
+#include <gtest/gtest.h>
+#include <unistd.h>
+#include <fcntl.h>
+#include <cstdio>
+#include <sys/stat.h>
+
+#include "ftxui/component/component.hpp"
+#include "ftxui/component/screen_interactive.hpp"
+#include "ftxui/dom/elements.hpp"
+
+#if !defined(_WIN32) && !defined(__EMSCRIPTEN__)
+
+namespace ftxui {
+
+namespace {
+
+// Test fixture for piped input functionality
+class PipedInputTest : public ::testing::Test {
+ protected:
+  void SetUp() override {
+    // Save original stdin for restoration
+    original_stdin_ = dup(STDIN_FILENO);
+  }
+
+  void TearDown() override {
+    // Restore original stdin
+    if (original_stdin_ >= 0) {
+      dup2(original_stdin_, STDIN_FILENO);
+      close(original_stdin_);
+    }
+  }
+
+  // Create a pipe and redirect stdin to read from it
+  void SetupPipedStdin() {
+    if (pipe(pipe_fds_) == 0) {
+      dup2(pipe_fds_[0], STDIN_FILENO);
+      close(pipe_fds_[0]);
+      // Keep write end open for writing test data
+      piped_stdin_setup_ = true;
+    }
+  }
+
+  // Write test data to the piped stdin
+  void WriteToPipedStdin(const std::string& data) {
+    if (piped_stdin_setup_) {
+      write(pipe_fds_[1], data.c_str(), data.length());
+      close(pipe_fds_[1]); // Close write end to signal EOF
+    }
+  }
+
+  // Check if /dev/tty is available (not available in some CI environments)
+  bool IsTtyAvailable() {
+    struct stat st;
+    return stat("/dev/tty", &st) == 0;
+  }
+
+ private:
+  int original_stdin_ = -1;
+  int pipe_fds_[2] = {-1, -1};
+  bool piped_stdin_setup_ = false;
+};
+
+TEST_F(PipedInputTest, DefaultBehaviorEnabled) {
+  // Test that HandlePipedInput is enabled by default
+  if (!IsTtyAvailable()) {
+    GTEST_SKIP() << "/dev/tty not available in this environment";
+  }
+
+  auto screen = ScreenInteractive::TerminalOutput();
+  auto component = Renderer([] { return text("test"); });
+
+  SetupPipedStdin();
+  WriteToPipedStdin("test data\n");
+
+  // Install should redirect stdin since HandlePipedInput is on by default
+  screen.Install();
+
+  // Stdin should be the tty
+  EXPECT_TRUE(isatty(STDIN_FILENO));
+
+  screen.Uninstall();
+}
+
+TEST_F(PipedInputTest, ExplicitlyDisabled) {
+  // Test that explicitly disabling works
+  auto screen = ScreenInteractive::TerminalOutput();
+  screen.HandlePipedInput(false);
+  auto component = Renderer([] { return text("test"); });
+
+  SetupPipedStdin();
+  WriteToPipedStdin("test data\n");
+
+  screen.Install();
+  
+  // Stdin should still be the pipe since feature is disabled
+  EXPECT_FALSE(isatty(STDIN_FILENO));
+  
+  screen.Uninstall();
+}
+
+TEST_F(PipedInputTest, ExplicitlyEnabled) {
+  if (!IsTtyAvailable()) {
+    GTEST_SKIP() << "/dev/tty not available in this environment";
+  }
+
+  auto screen = ScreenInteractive::TerminalOutput();
+  screen.HandlePipedInput(true); // Explicitly enable
+  auto component = Renderer([] { return text("test"); });
+
+  SetupPipedStdin();
+  WriteToPipedStdin("test data\n");
+
+  // Before install: stdin should be piped
+  EXPECT_FALSE(isatty(STDIN_FILENO));
+
+  screen.Install();
+  
+  // After install with piped input handling: stdin should be redirected to tty
+  EXPECT_TRUE(isatty(STDIN_FILENO));
+  
+  screen.Uninstall();
+  
+  // After uninstall: stdin should be restored to original state
+  // Note: This will be the pipe we set up, so it should be non-tty
+  EXPECT_FALSE(isatty(STDIN_FILENO));
+}
+
+TEST_F(PipedInputTest, NormalStdinUnchanged) {
+  // Test that normal stdin (not piped) is not affected
+  auto screen = ScreenInteractive::TerminalOutput();
+  auto component = Renderer([] { return text("test"); });
+
+  // Don't setup piped stdin - use normal stdin
+  bool original_isatty = isatty(STDIN_FILENO);
+
+  screen.Install();
+  
+  // Stdin should remain unchanged
+  EXPECT_EQ(original_isatty, isatty(STDIN_FILENO));
+  
+  screen.Uninstall();
+  
+  // Stdin should still be unchanged
+  EXPECT_EQ(original_isatty, isatty(STDIN_FILENO));
+}
+
+TEST_F(PipedInputTest, MultipleInstallUninstallCycles) {
+  if (!IsTtyAvailable()) {
+    GTEST_SKIP() << "/dev/tty not available in this environment";
+  }
+
+  auto screen = ScreenInteractive::TerminalOutput();
+  auto component = Renderer([] { return text("test"); });
+
+  SetupPipedStdin();
+  WriteToPipedStdin("test data\n");
+
+  // First cycle
+  screen.Install();
+  EXPECT_TRUE(isatty(STDIN_FILENO));
+  screen.Uninstall();
+  EXPECT_FALSE(isatty(STDIN_FILENO));
+
+  // Second cycle should work the same
+  screen.Install();
+  EXPECT_TRUE(isatty(STDIN_FILENO));
+  screen.Uninstall();
+  EXPECT_FALSE(isatty(STDIN_FILENO));
+}
+
+TEST_F(PipedInputTest, HandlePipedInputMethodBehavior) {
+  auto screen = ScreenInteractive::TerminalOutput();
+  
+  // Test method can be called multiple times
+  screen.HandlePipedInput(true);
+  screen.HandlePipedInput(false);
+  screen.HandlePipedInput(true);
+  
+  // Should be enabled after last call
+  SetupPipedStdin();
+  WriteToPipedStdin("test data\n");
+
+  if (IsTtyAvailable()) {
+    screen.Install();
+    EXPECT_TRUE(isatty(STDIN_FILENO));
+    screen.Uninstall();
+  }
+}
+
+// Test the graceful fallback when /dev/tty is not available
+// This test simulates environments like containers where /dev/tty might not exist
+TEST_F(PipedInputTest, GracefulFallbackWhenTtyUnavailable) {
+  auto screen = ScreenInteractive::TerminalOutput();
+  auto component = Renderer([] { return text("test"); });
+
+  SetupPipedStdin();
+  WriteToPipedStdin("test data\n");
+
+  // This test doesn't directly mock /dev/tty unavailability since that's hard to do
+  // in a unit test environment, but the code path handles freopen() failure gracefully
+  screen.Install();
+  
+  // The behavior depends on whether /dev/tty is available
+  // If available, stdin gets redirected; if not, it remains piped
+  // Both behaviors are correct
+  
+  screen.Uninstall();
+  
+  // After uninstall, stdin should be restored
+  EXPECT_FALSE(isatty(STDIN_FILENO)); // Should still be our test pipe
+}
+
+}  // namespace
+
+}  // namespace ftxui
+
+#endif  // !defined(_WIN32) && !defined(__EMSCRIPTEN__)

src/ftxui/component/slider.cpp

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

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 or the HEIGHT of the element must be
+/// @param direction Whether the WIDTH of the HEIGHT of the element must be
 ///                  constrained.
 /// @param constraint The type of constaint.
 /// @param value The value.