Merge baa5973128 into 2f0afe7b14

- Make the documentation workflow faster.
- Add to the CHANGELOG the fixes from:
22576bae6b

Fixed: https://github.com/ArthurSonzogni/FTXUI/issues/1029

.bazelrc

@@ -0,0 +1,7 @@
+build --features=layering_check
+build --enable_bzlmod
+
+build --enable_platform_specific_config
+build:linux --cxxopt=-std=c++20
+build:macos --cxxopt=-std=c++20
+build:windows --cxxopt=-std:c++20

.bcr/README.md

@@ -0,0 +1,9 @@
+# Bazel Central Registry
+
+When the ruleset is released, we want it to be published to the
+Bazel Central Registry automatically:
+<https://registry.bazel.build>
+
+This folder contains configuration files to automate the publish step.
+See <https://github.com/bazel-contrib/publish-to-bcr/blob/main/templates/README.md>
+for authoritative documentation about these files.

.bcr/metadata.template.json

@@ -0,0 +1,16 @@
+{
+  "homepage": "https://github.com/ArthurSonzogni/FTXUI",
+  "maintainers": [
+    {
+      "name": "Arthur Sonzogni",
+      "email": "sonzogniarthur@gmail.com",
+      "github": "ArthurSonzogni",
+      "github_user_id": 4759106
+    }
+  ],
+  "repository": [
+    "github:ArthurSonzogni/FTXUI"
+  ],
+  "versions": [],
+  "yanked_versions": {}
+}

.bcr/presubmit.yml

@@ -0,0 +1,36 @@
+matrix:
+  bazel:
+    - 7.x
+    - 8.x
+    - rolling
+  unix_platform:
+    - debian11
+    - ubuntu2204
+    - macos
+    - macos_arm64
+  win_platform:
+    - windows
+
+tasks:
+
+  unix_test:
+    name: Verify build targets on Unix
+    platform: ${{ unix_platform }}
+    bazel: ${{ bazel }}
+    build_flags:
+    - --cxxopt=-std=c++20
+    build_targets:
+    - '@ftxui//:dom'
+    - '@ftxui//:component'
+    - '@ftxui//:screen'
+
+  windows_test:
+    name: Verify build targets
+    platform: ${{ win_platform }}
+    bazel: ${{ bazel }}
+    build_flags:
+    - --cxxopt=/std:c++20
+    build_targets:
+    - '@ftxui//:dom'
+    - '@ftxui//:component'
+    - '@ftxui//:screen'

.bcr/source.template.json

@@ -0,0 +1,5 @@
+{
+  "integrity": "",
+  "strip_prefix": "",
+  "url": "https://github.com/ArthurSonzogni/FTXUI/releases/download/{TAG}/source.tar.gz"
+}

.github/workflows/build.yaml

@@ -1,17 +1,63 @@
 name: Build
 
 on:
-  create:
+  # On new commits to main:
   push:
     branches:
       - main
+
+  # On pull requests:
   pull_request:
     branches:
       - main
 
 jobs:
-  test:
-    name: "Tests"
+
+  test_bazel:
+    name: "Bazel, ${{ matrix.cxx }}, ${{ matrix.os }}"
+    strategy:
+      fail-fast: false
+      matrix:
+        include:
+          - os: ubuntu-latest
+            cxx: g++
+            cc: gcc
+
+          - os: ubuntu-latest
+            cxx: clang++
+            cc: clang
+
+          - os: macos-latest
+            cxx: g++
+            cc: gcc
+
+          - os: macos-latest
+            cxx: clang++
+            cc: clang
+
+          - os: windows-latest
+            cxx: cl
+            cc: cl
+
+    runs-on: ${{ matrix.os }}
+    steps:
+      - name: "Checkout repository"
+        uses: actions/checkout@v3
+
+      - name: "Build with Bazel"
+        env:
+          CC: ${{ matrix.cc }}
+          CXX: ${{ matrix.cxx }}
+        run: bazel build ...
+
+      - name: "Tests with Bazel"
+        env:
+          CC: ${{ matrix.cc }}
+          CXX: ${{ matrix.cxx }}
+        run: bazel test --test_output=all ...
+
+  test_cmake:
+    name: "CMake, ${{ matrix.compiler }}, ${{ matrix.os }}"
     strategy:
       fail-fast: false
       matrix:
@@ -19,18 +65,16 @@ jobs:
           - name: Linux GCC
             os: ubuntu-latest
             compiler: gcc
-            gcov_executable: gcov
 
           - name: Linux Clang
             os: ubuntu-latest
             compiler: llvm
             gcov_executable: "llvm-cov gcov"
 
-          # https://github.com/aminya/setup-cpp/issues/246
-          #- name: MacOS clang
-            #os: macos-latest
-            #compiler: llvm
-            #gcov_executable: "llvm-cov gcov"
+          - name: MacOS clang
+            os: macos-latest
+            compiler: llvm
+            gcov_executable: "llvm-cov gcov"
 
           - name: Windows MSVC
             os: windows-latest
@@ -85,7 +129,7 @@ jobs:
           ctest -C Debug --rerun-failed --output-on-failure;
 
       - name: Unix - coverage
-        if: runner.os != 'Windows'
+        if: matrix.gcov_executable != ''
         working-directory: ./build
         run: >
           gcovr
@@ -121,119 +165,3 @@ jobs:
           flags: ${{ runner.os }}
           name: ${{ runner.os }}-coverage
           files: ./build/coverage.xml
-
-  # Create a release on new v* tags
-  release:
-    needs: test
-    if: ${{ github.event_name == 'create' && startsWith(github.ref, 'refs/tags/v') }}
-    name: "Create release"
-    runs-on: ubuntu-latest
-    outputs:
-      upload_url: ${{ steps.create_release.outputs.upload_url }}
-    steps:
-      - name: "Create release"
-        uses: softprops/action-gh-release@v1
-        id: create_release
-        with:
-          draft: true
-        env:
-          GITHUB_TOKEN: ${{ secrets.GITHUB_TOKEN }}
-
-  # Build artifact for the release
-  package:
-    name: "Build packages"
-    needs: release
-    strategy:
-      matrix:
-        include:
-          - os: ubuntu-latest
-            asset_path: build/ftxui*Linux*
-          - os: macos-latest
-            asset_path: build/ftxui*Darwin*
-          - os: windows-latest
-            asset_path: build/ftxui*Win64*
-    runs-on: ${{ matrix.os }}
-    steps:
-      - name: Get number of CPU cores
-        uses: SimenB/github-actions-cpu-cores@v1
-        id: cpu-cores
-
-      - name: "Checkout repository"
-        uses: actions/checkout@v3
-
-      - name: "Install cmake"
-        uses: lukka/get-cmake@latest
-
-      - name: "Build packages"
-        run: >
-          mkdir build;
-          cd build;
-          cmake ..
-          -DCMAKE_BUILD_TYPE=Release
-          -DCMAKE_BUILD_PARALLEL_LEVEL=${{ steps.cpu-cores.outputs.count }}
-          -DFTXUI_BUILD_DOCS=OFF
-          -DFTXUI_BUILD_EXAMPLES=OFF
-          -DFTXUI_BUILD_TESTS=OFF
-          -DFTXUI_BUILD_TESTS_FUZZER=OFF
-          -DFTXUI_ENABLE_INSTALL=ON
-          -DFTXUI_DEV_WARNINGS=ON ;
-          cmake --build . --target package;
-
-      - uses: shogo82148/actions-upload-release-asset@v1
-        with:
-          upload_url: ${{ needs.release.outputs.upload_url }}
-          asset_path: ${{ matrix.asset_path }}
-          overwrite: true
-  
-  documentation:
-    if: github.ref == 'refs/heads/main'
-    runs-on: ubuntu-latest
-    steps:
-      - name: "Checkout repository"
-        uses: actions/checkout@v3
-
-      - name: "Install cmake"
-        uses: lukka/get-cmake@latest
-
-      - name: "Install emsdk"
-        uses: mymindstorm/setup-emsdk@v7
-
-      - name: "Install Doxygen/Graphviz"
-        run: >
-          sudo apt-get update;
-          sudo apt-get install doxygen graphviz;
-
-      - name: "Build documentation"
-        run: >
-          mkdir build;
-          cd build;
-          emcmake cmake ..
-          -DCMAKE_BUILD_TYPE=Release
-          -DFTXUI_BUILD_DOCS=ON
-          -DFTXUI_BUILD_EXAMPLES=ON
-          -DFTXUI_BUILD_TESTS=OFF
-          -DFTXUI_BUILD_TESTS_FUZZER=OFF
-          -DFTXUI_ENABLE_INSTALL=OFF
-          -DFTXUI_DEV_WARNINGS=ON ;
-          cmake --build . --target doc;
-          cmake --build . ;
-          rsync -amv
-          --include='*/'
-          --include='*.html'
-          --include='*.css'
-          --include='*.mjs'
-          --include='*.js'
-          --include='*.wasm'
-          --exclude='*'
-          examples
-          doc/doxygen/html;
-
-      - name: "Deploy"
-        uses: peaceiris/actions-gh-pages@v3
-        with:
-          github_token: ${{ secrets.GITHUB_TOKEN }}
-          publish_dir: build/doc/doxygen/html/
-          enable_jekyll: false
-          allow_empty_commit: false
-          force_orphan: true
-          publish_branch: gh-pages

.github/workflows/codeql.yml

@@ -1,76 +0,0 @@
-# For most projects, this workflow file will not need changing; you simply need
-# to commit it to your repository.
-#
-# You may wish to alter this file to override the set of languages analyzed,
-# or to provide custom queries or build logic.
-#
-# ******** NOTE ********
-# We have attempted to detect the languages in your repository. Please check
-# the `language` matrix defined below to confirm you have the correct set of
-# supported CodeQL languages.
-#
-name: "CodeQL"
-
-on:
-  push:
-    branches: [ "main" ]
-  pull_request:
-    # The branches below must be a subset of the branches above
-    branches: [ "main" ]
-  schedule:
-    - cron: '45 22 * * 5'
-
-jobs:
-  analyze:
-    name: Analyze
-    runs-on: ${{ (matrix.language == 'swift' && 'macos-latest') || 'ubuntu-latest' }}
-    permissions:
-      actions: read
-      contents: read
-      security-events: write
-
-    strategy:
-      fail-fast: false
-      matrix:
-        language: [ 'cpp' ]
-        # CodeQL supports [ 'cpp', 'csharp', 'go', 'java', 'javascript', 'python', 'ruby' ]
-        # Use only 'java' to analyze code written in Java, Kotlin or both
-        # Use only 'javascript' to analyze code written in JavaScript, TypeScript or both
-        # Learn more about CodeQL language support at https://aka.ms/codeql-docs/language-support
-
-    steps:
-    - name: Checkout repository
-      uses: actions/checkout@v3
-
-    # Initializes the CodeQL tools for scanning.
-    - name: Initialize CodeQL
-      uses: github/codeql-action/init@v2
-      with:
-        languages: ${{ matrix.language }}
-        # If you wish to specify custom queries, you can do so here or in a config file.
-        # By default, queries listed here will override any specified in a config file.
-        # Prefix the list here with "+" to use these queries and those in the config file.
-
-        # For more details on CodeQL's query packs, refer to: https://docs.github.com/en/code-security/code-scanning/automatically-scanning-your-code-for-vulnerabilities-and-errors/configuring-code-scanning#using-queries-in-ql-packs
-        # queries: security-extended,security-and-quality
-
-
-    # Autobuild attempts to build any compiled languages  (C/C++, C#, Go, or Java).
-    # If this step fails, then you should remove it and run the build manually (see below)
-    - name: Autobuild
-      uses: github/codeql-action/autobuild@v2
-
-    # ℹ️ Command-line programs to run using the OS shell.
-    # 📚 See https://docs.github.com/en/actions/using-workflows/workflow-syntax-for-github-actions#jobsjob_idstepsrun
-
-    #   If the Autobuild fails above, remove it and uncomment the following three lines.
-    #   modify them (or add more) to build your code if your project, please refer to the EXAMPLE below for guidance.
-
-    # - run: |
-    #     echo "Run, Build Application using script"
-    #     ./location_of_script_within_repo/buildscript.sh
-
-    - name: Perform CodeQL Analysis
-      uses: github/codeql-action/analyze@v2
-      with:
-        category: "/language:${{matrix.language}}"

.github/workflows/documentation.yaml

@@ -0,0 +1,65 @@
+name: Documentation
+
+on:
+  # On new commits to main:
+  push:
+    branches:
+      - main
+
+jobs:
+  documentation:
+    runs-on: ubuntu-latest
+    steps:
+      - name: "Checkout repository"
+        uses: actions/checkout@v3
+
+      - name: "Install cmake"
+        uses: lukka/get-cmake@latest
+
+      - name: "Install emsdk"
+        uses: mymindstorm/setup-emsdk@v7
+
+      - name: "Install Doxygen"
+        uses: ssciwr/doxygen-install@v1
+        with:
+          version: '1.12.0'
+
+      - name: "Install Graphviz"
+        run: >
+          sudo apt-get update;
+          sudo apt-get install graphviz;
+
+      - name: "Build documentation"
+        run: >
+          mkdir build;
+          cd build;
+          emcmake cmake ..
+          -DCMAKE_BUILD_TYPE=Release
+          -DFTXUI_BUILD_DOCS=ON
+          -DFTXUI_BUILD_EXAMPLES=ON
+          -DFTXUI_BUILD_TESTS=OFF
+          -DFTXUI_BUILD_TESTS_FUZZER=OFF
+          -DFTXUI_ENABLE_INSTALL=OFF
+          -DFTXUI_DEV_WARNINGS=OFF;
+          cmake --build . --target doc;
+          cmake --build . ;
+          rsync -amv
+          --include='*/'
+          --include='*.html'
+          --include='*.css'
+          --include='*.mjs'
+          --include='*.js'
+          --include='*.wasm'
+          --exclude='*'
+          examples
+          doc/doxygen/html;
+
+      - name: "Deploy"
+        uses: peaceiris/actions-gh-pages@v3
+        with:
+          github_token: ${{ secrets.GITHUB_TOKEN }}
+          publish_dir: build/doc/doxygen/html/
+          enable_jekyll: false
+          allow_empty_commit: false
+          force_orphan: true
+          publish_branch: gh-pages

.github/workflows/publish.yaml

@@ -0,0 +1,24 @@
+name: "Publish to Bazel Central Registry"
+
+on:
+  # Manual kick-off (you type the tag)
+  workflow_dispatch:
+    inputs:
+      tag_name:
+        description: "Tag to publish"
+        required: true
+        type: string
+
+permissions:
+  contents:     write
+
+jobs:
+  publish:
+    uses: bazel-contrib/publish-to-bcr/.github/workflows/publish.yaml@v0.0.4
+    with:
+      tag_name: ${{ github.event.inputs.tag_name }}
+      registry_fork: ArthurSonzogni/bazel-central-registry
+      attest: false
+
+    secrets:
+      publish_token: ${{ secrets.PUBLISH_TOKEN }}

.github/workflows/release.yaml

@@ -0,0 +1,100 @@
+name: Release
+
+on:
+  # On push to a tag:
+  push:
+    tags:
+      - 'v*'
+
+  # On manual trigger:
+  workflow_dispatch:
+
+permissions:
+  # Needed to mint attestations
+  id-token: write
+  attestations: write
+  # Needed to upload release assets
+  contents: write
+
+jobs:
+  release:
+    name: "Create release"
+    runs-on: ubuntu-latest
+    outputs:
+      upload_url: ${{ steps.create_release.outputs.upload_url }}
+    steps:
+      - name: "Create release"
+        uses: softprops/action-gh-release@v1
+        id: create_release
+        with:
+          draft: true
+        env:
+          GITHUB_TOKEN: ${{ secrets.GITHUB_TOKEN }}
+
+  # Build artifact for the release
+  package_compiled:
+    name: "Build packages"
+    needs: release
+    strategy:
+      matrix:
+        include:
+          - os: ubuntu-latest
+            asset_path: build/ftxui*Linux*
+          - os: macos-latest
+            asset_path: build/ftxui*Darwin*
+          - os: windows-latest
+            asset_path: build/ftxui*Win64*
+    runs-on: ${{ matrix.os }}
+    steps:
+      - name: Get number of CPU cores
+        uses: SimenB/github-actions-cpu-cores@v1
+        id: cpu-cores
+
+      - name: "Checkout repository"
+        uses: actions/checkout@v3
+
+      - name: "Install cmake"
+        uses: lukka/get-cmake@latest
+
+      - name: "Build packages"
+        run: >
+          mkdir build;
+          cd build;
+          cmake ..
+          -DCMAKE_BUILD_TYPE=Release
+          -DCMAKE_BUILD_PARALLEL_LEVEL=${{ steps.cpu-cores.outputs.count }}
+          -DFTXUI_BUILD_DOCS=OFF
+          -DFTXUI_BUILD_EXAMPLES=OFF
+          -DFTXUI_BUILD_TESTS=OFF
+          -DFTXUI_BUILD_TESTS_FUZZER=OFF
+          -DFTXUI_ENABLE_INSTALL=ON
+          -DFTXUI_DEV_WARNINGS=ON ;
+          cmake --build . --target package;
+
+      - uses: shogo82148/actions-upload-release-asset@v1
+        with:
+          upload_url: ${{ needs.release.outputs.upload_url }}
+          asset_path: ${{ matrix.asset_path }}
+          overwrite: true
+
+  # Build "source" artifact for the release. This is the same as the github
+  # "source" archive, but with a stable URL. This is useful for the Bazel
+  # Central Repository.
+  package_source:
+    name: "Build source package"
+    needs: release
+    runs-on: ubuntu-latest
+    steps:
+      - name: "Checkout repository"
+        uses: actions/checkout@v3
+
+      - name: "Create source package"
+        run: >
+          git archive --format=tar.gz -o source.tar.gz HEAD
+
+      - name: "Upload source package"
+        uses: shogo82148/actions-upload-release-asset@v1
+        with:
+          upload_url: ${{ needs.release.outputs.upload_url }}
+          asset_path: source.tar.gz
+          overwrite: true

.gitignore

@@ -20,6 +20,10 @@ out/
 !flake.nix
 !ftxui.pc.in
 !iwyu.imp
+!WORKSPACE.bazel
+!BUILD.bazel
+!MODULE.bazel
+!.bazelrc
 
 # .github directory:
 !.github/**/*.yaml
@@ -29,6 +33,10 @@ out/
 !cmake/**/*.in
 !cmake/**/*.cmake
 
+# bazel directory:
+!bazel/**/*.bzl
+!.bcr/*
+
 # doc directory:
 !doc/**/Doxyfile.in
 !doc/**/*.txt

BUILD.bazel

@@ -0,0 +1,270 @@
+# 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.
+
+# TODO:
+# - Build benchmark.
+# - Build fuzzers.
+# - Build documentation.
+# - Enable the two tests timing out.
+# - Support WebAssembly
+
+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 
+# component.
+# ┌component──┐
+# │┌dom──────┐│
+# ││┌screen─┐││
+# └┴┴───────┴┴┘
+alias(name = "ftxui", actual = ":component")
+
+# @ftxui:screen is a module that provides a screen buffer and color management
+# for terminal applications. A screen is a 2D array of cells, each cell can
+# contain a glyph, a color, and other attributes. The library also provides
+# functions to manipulate the screen.
+ftxui_cc_library(
+    name = "screen",
+    srcs = [
+        "src/ftxui/screen/box.cpp",
+        "src/ftxui/screen/color.cpp",
+        "src/ftxui/screen/color_info.cpp",
+        "src/ftxui/screen/image.cpp",
+        "src/ftxui/screen/screen.cpp",
+        "src/ftxui/screen/string.cpp",
+        "src/ftxui/screen/string_internal.hpp",
+        "src/ftxui/screen/terminal.cpp",
+        "src/ftxui/screen/util.hpp",
+    ],
+    hdrs = [
+        "include/ftxui/screen/box.hpp",
+        "include/ftxui/screen/color.hpp",
+        "include/ftxui/screen/color_info.hpp",
+        "include/ftxui/screen/deprecated.hpp",
+        "include/ftxui/screen/image.hpp",
+        "include/ftxui/screen/pixel.hpp",
+        "include/ftxui/screen/screen.hpp",
+        "include/ftxui/screen/string.hpp",
+        "include/ftxui/screen/terminal.hpp",
+        "include/ftxui/util/autoreset.hpp",
+        "include/ftxui/util/ref.hpp",
+    ],
+)
+
+# @ftxui:dom is a library that provides a way to create and manipulate a
+# "document" that can be rendered to a screen. The document is a tree of nodes.
+# Nodes can be text, layouts, or various decorators. Users needs to compose
+# nodes to create a document. A document is responsive to the size of the
+# screen.
+ftxui_cc_library(
+    name = "dom",
+    srcs = [
+        "src/ftxui/dom/automerge.cpp",
+        "src/ftxui/dom/blink.cpp",
+        "src/ftxui/dom/bold.cpp",
+        "src/ftxui/dom/border.cpp",
+        "src/ftxui/dom/box_helper.cpp",
+        "src/ftxui/dom/box_helper.hpp",
+        "src/ftxui/dom/canvas.cpp",
+        "src/ftxui/dom/clear_under.cpp",
+        "src/ftxui/dom/color.cpp",
+        "src/ftxui/dom/composite_decorator.cpp",
+        "src/ftxui/dom/dbox.cpp",
+        "src/ftxui/dom/dim.cpp",
+        "src/ftxui/dom/flex.cpp",
+        "src/ftxui/dom/flexbox.cpp",
+        "src/ftxui/dom/flexbox_config.cpp",
+        "src/ftxui/dom/flexbox_helper.cpp",
+        "src/ftxui/dom/flexbox_helper.hpp",
+        "src/ftxui/dom/focus.cpp",
+        "src/ftxui/dom/frame.cpp",
+        "src/ftxui/dom/gauge.cpp",
+        "src/ftxui/dom/graph.cpp",
+        "src/ftxui/dom/gridbox.cpp",
+        "src/ftxui/dom/hbox.cpp",
+        "src/ftxui/dom/hyperlink.cpp",
+        "src/ftxui/dom/inverted.cpp",
+        "src/ftxui/dom/italic.cpp",
+        "src/ftxui/dom/linear_gradient.cpp",
+        "src/ftxui/dom/node.cpp",
+        "src/ftxui/dom/node_decorator.cpp",
+        "src/ftxui/dom/node_decorator.hpp",
+        "src/ftxui/dom/paragraph.cpp",
+        "src/ftxui/dom/reflect.cpp",
+        "src/ftxui/dom/scroll_indicator.cpp",
+        "src/ftxui/dom/selection.cpp",
+        "src/ftxui/dom/selection_style.cpp",
+        "src/ftxui/dom/separator.cpp",
+        "src/ftxui/dom/size.cpp",
+        "src/ftxui/dom/spinner.cpp",
+        "src/ftxui/dom/strikethrough.cpp",
+        "src/ftxui/dom/table.cpp",
+        "src/ftxui/dom/text.cpp",
+        "src/ftxui/dom/underlined.cpp",
+        "src/ftxui/dom/underlined_double.cpp",
+        "src/ftxui/dom/util.cpp",
+        "src/ftxui/dom/vbox.cpp",
+    ],
+    hdrs = [
+        "include/ftxui/dom/canvas.hpp",
+        "include/ftxui/dom/deprecated.hpp",
+        "include/ftxui/dom/direction.hpp",
+        "include/ftxui/dom/elements.hpp",
+        "include/ftxui/dom/flexbox_config.hpp",
+        "include/ftxui/dom/linear_gradient.hpp",
+        "include/ftxui/dom/node.hpp",
+        "include/ftxui/dom/requirement.hpp",
+        "include/ftxui/dom/selection.hpp",
+        "include/ftxui/dom/table.hpp",
+        "include/ftxui/dom/take_any_args.hpp",
+    ],
+    deps = [":screen"],
+)
+
+# @ftxui:component is a library to create "dynamic" component renderering and
+# updating a ftxui::dom document on the screen. It is a higher level API than
+# ftxui:dom.
+#
+# The module is required if your program needs to respond to user input. It
+# defines a set of ftxui::Component. These components can be utilized to
+# navigate using the arrow keys and/or cursor. There are several builtin widgets
+# like checkbox/inputbox/etc to interact with. You can combine them, or even
+# define your own custom components.
+ftxui_cc_library(
+    name = "component",
+    srcs = [
+        "src/ftxui/component/animation.cpp",
+        "src/ftxui/component/button.cpp",
+        "src/ftxui/component/catch_event.cpp",
+        "src/ftxui/component/checkbox.cpp",
+        "src/ftxui/component/collapsible.cpp",
+        "src/ftxui/component/component.cpp",
+        "src/ftxui/component/component_options.cpp",
+        "src/ftxui/component/container.cpp",
+        "src/ftxui/component/dropdown.cpp",
+        "src/ftxui/component/event.cpp",
+        "src/ftxui/component/hoverable.cpp",
+        "src/ftxui/component/input.cpp",
+        "src/ftxui/component/loop.cpp",
+        "src/ftxui/component/maybe.cpp",
+        "src/ftxui/component/menu.cpp",
+        "src/ftxui/component/modal.cpp",
+        "src/ftxui/component/radiobox.cpp",
+        "src/ftxui/component/renderer.cpp",
+        "src/ftxui/component/resizable_split.cpp",
+        "src/ftxui/component/screen_interactive.cpp",
+        "src/ftxui/component/slider.cpp",
+        "src/ftxui/component/terminal_input_parser.cpp",
+        "src/ftxui/component/terminal_input_parser.hpp",
+        "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",
+    ],
+    hdrs = [
+        "include/ftxui/component/animation.hpp",
+        "include/ftxui/component/captured_mouse.hpp",
+        "include/ftxui/component/component.hpp",
+        "include/ftxui/component/component_base.hpp",
+        "include/ftxui/component/component_options.hpp",
+        "include/ftxui/component/event.hpp",
+        "include/ftxui/component/loop.hpp",
+        "include/ftxui/component/mouse.hpp",
+        "include/ftxui/component/receiver.hpp",
+        "include/ftxui/component/screen_interactive.hpp",
+        "include/ftxui/component/task.hpp",
+    ],
+    linkopts = pthread_linkopts(),
+    deps = [
+        ":dom",
+        ":screen",
+    ],
+)
+
+# FTXUI's tests
+cc_test(
+    name = "tests",
+    testonly = True,
+    srcs = [
+        "src/ftxui/component/animation_test.cpp",
+        "src/ftxui/component/button_test.cpp",
+        "src/ftxui/component/collapsible_test.cpp",
+        "src/ftxui/component/component_test.cpp",
+        "src/ftxui/component/container_test.cpp",
+        "src/ftxui/component/dropdown_test.cpp",
+        "src/ftxui/component/hoverable_test.cpp",
+        "src/ftxui/component/input_test.cpp",
+        "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",
+        "src/ftxui/component/toggle_test.cpp",
+        "src/ftxui/dom/blink_test.cpp",
+        "src/ftxui/dom/bold_test.cpp",
+        "src/ftxui/dom/border_test.cpp",
+        "src/ftxui/dom/canvas_test.cpp",
+        "src/ftxui/dom/color_test.cpp",
+        "src/ftxui/dom/dbox_test.cpp",
+        "src/ftxui/dom/dim_test.cpp",
+        "src/ftxui/dom/flexbox_helper_test.cpp",
+        "src/ftxui/dom/flexbox_test.cpp",
+        "src/ftxui/dom/gauge_test.cpp",
+        "src/ftxui/dom/gridbox_test.cpp",
+        "src/ftxui/dom/hbox_test.cpp",
+        "src/ftxui/dom/hyperlink_test.cpp",
+        "src/ftxui/dom/italic_test.cpp",
+        "src/ftxui/dom/linear_gradient_test.cpp",
+        "src/ftxui/dom/scroll_indicator_test.cpp",
+        "src/ftxui/dom/separator_test.cpp",
+        "src/ftxui/dom/spinner_test.cpp",
+        "src/ftxui/dom/table_test.cpp",
+        "src/ftxui/dom/text_test.cpp",
+        "src/ftxui/dom/underlined_test.cpp",
+        "src/ftxui/dom/vbox_test.cpp",
+        "src/ftxui/screen/color_test.cpp",
+        "src/ftxui/screen/string_test.cpp",
+        "src/ftxui/util/ref_test.cpp",
+
+        # Private header from ftxui:screen for string_test.cpp.
+        "src/ftxui/screen/string_internal.hpp",
+
+        # Private header from ftxui::component for
+        # terminal_input_parser_test.cpp.
+        "src/ftxui/component/terminal_input_parser.hpp",
+
+        # Private header from ftxui::dom for
+        # flexbox_helper_test.cpp.
+        "src/ftxui/dom/flexbox_helper.hpp",
+
+        # TODO: Enable the two tests timing out with Bazel:
+        # - "src/ftxui/component/screen_interactive_test.cpp",
+        # - "src/ftxui/dom/selection_test.cpp",
+    ],
+    includes = [
+        "include",
+        "src",
+    ],
+    copts = windows_copts(),
+    deps = [
+        ":screen",
+        ":dom",
+        ":component",
+        "@googletest//:gtest",
+        "@googletest//:gtest_main",
+    ],
+)
+
+generate_examples()

CHANGELOG.md

@@ -1,8 +1,82 @@
 Changelog
 =========
 
-current (development) 
----------------------
+Next
+====
+
+### Doc
+- Fix broken Doxygen output. See @markmandel in #1029.
+- Use Doxygen awesome. Add our own theme.
+- Break the documentation into several pages.
+
+
+6.1.9 (2025-05-07)
+------------
+
+### Build
+If all goes well (pending), ftxui should appear in the Bazel central repository.
+It can be imported into your project using the following lines:
+
+**MODULE.bazel**
+```bazel
+bazel_dep(name = "ftxui", version = "6.1.9")
+```
+
+Thanks @robinlinden and @kcc for the reviews.
+
+### dom
+- Bugfix: Restore the `dbox` behavior from ftxui 5.0.0. To apply bgcolor
+  blending between the two layers, a new `dboxBlend` will be added.
+
+6.1.8 (2025-05-01)
+------------------
+
+### Build
+- Feature: Support `bazel` build system. See #1032.
+  Proposed by Kostya Serebryany @kcc
+
+  **BUILD.bazel**
+  ```bazel
+  deps = [
+    // Depend on the whole library:
+    "@ftxui//:ftxui",
+
+    // Choose a specific submodule:
+    "@ftxui//:component",
+    "@ftxui//:dom",
+    "@ftxui//:screen",
+  ]
+  ```
+
+### Component
+- Bugfix: Fix a crash with ResizeableSplit. See #1023.
+  - Clamp screen size to terminal size.
+  - Disallow `ResizeableSplit` with negative size.
+
+### Dom
+- Bugfix: Disallow specifying a negative size constraint. See #1023.
+
+
+6.0.2 (2025-03-30)
+-----
+
+### Component
+- BugFix: Fix major crash on Windows affecting all components. See #1020
+- BugFix: Fix focusRelative.
+
+6.0.1 (2025-03-28)
+-----
+
+Same as v6.0.0.
+
+Due to a problem tag v6.0.0 was replaced. This isn't a good practice and affect
+developers that started using it in the short timeframe. Submitting a new
+release with the same content is the best way to fix this.
+
+See #1017 and #1019.
+
+6.0.0 (2025-03-23)
+-----
 
 ### Component
 - Feature: Add support for raw input. Allowing more keys to be detected.
@@ -16,6 +90,9 @@ current (development)
 - Feature: Add support for `Input`'s insert mode. Add `InputOption::insert`
   option. Added by @mingsheng13.
 - Feature: Add `DropdownOption` to configure the dropdown. See #826.
+- Feature: Add support for Selection. Thanks @clement-roblot. See #926.
+  - See `ScreenInteractive::GetSelection()`.
+  - See `ScreenInteractive::SelectionChange(...)` listener.
 - Bugfix/Breaking change: `Mouse transition`:
   - Detect when the mouse move, as opposed to being pressed.
     The Mouse::Moved motion was added.
@@ -41,14 +118,37 @@ current (development)
   See #932
 - Feature: Add `SliderOption::on_change`. This allows to set a callback when the
   slider value changes. See #938.
+- Bugfix: Handle `Dropdown` with no entries.
+- Bugfix: Fix crash in `LinearGradient` due to float precision and an off-by-one
+          mistake. See #998.
 
 ### Dom
+- Feature: Add `italic` decorator. For instance:
+  ```cpp
+  auto italic_text = text("Italic text") | italic;
+  ```
+  ```cpp
+  auto italic_text = italic(text("Italic text"));
+  ```
+  Proposed by @kenReneris in #1009.
 - Feature: Add `hscroll_indicator`. It display an horizontal indicator
   reflecting the current scroll position. Proposed by @ibrahimnasson in
   [issue 752](https://github.com/ArthurSonzogni/FTXUI/issues/752)
 - Feature: Add `extend_beyond_screen` option to `Dimension::Fit(..)`, allowing
   the element to be larger than the screen. Proposed by @LordWhiro. See #572 and
   #949.
+- Feature: Add support for Selection. Thanks @clement-roblot. See #926.
+  - See `selectionColor` decorator.
+  - See `selectionBackgroundColor` decorator.
+  - See `selectionForegroundColor` decorator.
+  - See `selectionStyle(style)` decorator.
+  - See `selectionStyleReset` decorator.
+- Breaking change: Change how "focus"/"select" are handled. This fixes the
+  behavior.
+- Breaking change: `Component::OnRender()` becomes the method to override to
+  render a component. This replaces `Component::Render()` that is still in use
+  to call the rendering method on the children. This change allows to fix a
+  couple of issues around focus handling.
 
 ### Screen
 - Feature: Add `Box::IsEmpty()`.

CMakeLists.txt

@@ -2,7 +2,7 @@ cmake_minimum_required(VERSION 3.12)
 
 project(ftxui
   LANGUAGES CXX
-  VERSION 5.0.0
+  VERSION 6.1.9
   DESCRIPTION "C++ Functional Terminal User Interface."
 )
 
@@ -56,11 +56,12 @@ add_library(dom
   include/ftxui/dom/flexbox_config.hpp
   include/ftxui/dom/node.hpp
   include/ftxui/dom/requirement.hpp
+  include/ftxui/dom/selection.hpp
   include/ftxui/dom/take_any_args.hpp
   src/ftxui/dom/automerge.cpp
+  src/ftxui/dom/selection_style.cpp
   src/ftxui/dom/blink.cpp
   src/ftxui/dom/bold.cpp
-  src/ftxui/dom/hyperlink.cpp
   src/ftxui/dom/border.cpp
   src/ftxui/dom/box_helper.cpp
   src/ftxui/dom/box_helper.hpp
@@ -81,13 +82,16 @@ add_library(dom
   src/ftxui/dom/graph.cpp
   src/ftxui/dom/gridbox.cpp
   src/ftxui/dom/hbox.cpp
+  src/ftxui/dom/hyperlink.cpp
   src/ftxui/dom/inverted.cpp
+  src/ftxui/dom/italic.cpp
   src/ftxui/dom/linear_gradient.cpp
   src/ftxui/dom/node.cpp
   src/ftxui/dom/node_decorator.cpp
   src/ftxui/dom/paragraph.cpp
   src/ftxui/dom/reflect.cpp
   src/ftxui/dom/scroll_indicator.cpp
+  src/ftxui/dom/selection.cpp
   src/ftxui/dom/separator.cpp
   src/ftxui/dom/size.cpp
   src/ftxui/dom/spinner.cpp

MODULE.bazel

@@ -0,0 +1,13 @@
+# FTXUI module.
+module(
+    name = "ftxui",
+    version = "6.1.9",
+    compatibility_level = 6,
+)
+
+# Build dependencies.
+bazel_dep(name = "rules_cc", version = "0.1.1")
+bazel_dep(name = "platforms", version = "0.0.10")
+
+# Test dependencies.
+bazel_dep(name = "googletest", version = "1.14.0.bcr.1", dev_dependency = True)

README.md

@@ -42,15 +42,24 @@ A simple cross-platform C++ library for terminal based user interfaces!
  * No dependencies
  * **Cross platform**: Linux/MacOS (main target), WebAssembly, Windows (Thanks to contributors!).
  * Learn by [examples](#documentation), and [tutorials](#documentation)
- * Multiple packages: CMake [FetchContent]([https://bewagner.net/programming/2020/05/02/cmake-fetchcontent/](https://cmake.org/cmake/help/latest/module/FetchContent.html)) (preferred), vcpkg, pkgbuild, conan.
+ * Multiple packages:
+     - CMake [FetchContent]([https://bewagner.net/programming/2020/05/02/cmake-fetchcontent/](https://cmake.org/cmake/help/latest/module/FetchContent.html)) (preferred)
+     - [Bazel](https://registry.bazel.build/modules/ftxui)
+     - [vcpkg](https://vcpkg.link/ports/ftxui)
+     - [Conan](https://conan.io/center/recipes/ftxui) [Debian package](https://tracker.debian.org/pkg/ftxui)
+     - [Ubuntu package](https://launchpad.net/ubuntu/+source/ftxui)
+     - [Arch Linux](https://aur.archlinux.org/packages/ftxui/)
+     - [OpenSUSE](https://build.opensuse.org/package/show/devel:libraries:c_c++/ftxui)
  * Good practices: documentation, tests, fuzzers, performance tests, automated CI, automated packaging, etc...
 
 ## Documentation
 
-- [Starter example project](https://github.com/ArthurSonzogni/ftxui-starter)
+- [Starter CMake](https://github.com/ArthurSonzogni/ftxui-starter)
+- [Starter Bazel](https://github.com/ArthurSonzogni/ftxui-bazel)
 - [Documentation](https://arthursonzogni.github.io/FTXUI/)
 - [Examples (WebAssembly)](https://arthursonzogni.github.io/FTXUI/examples/)
 - [Build using CMake](https://arthursonzogni.github.io/FTXUI/#build-cmake)
+- [Build using Bazel](https://arthursonzogni.github.io/FTXUI/#build-bazel)
 
 ## Example
 ~~~cpp
@@ -109,6 +118,7 @@ Element can become flexible using the the `flex` decorator.
 
 An element can be decorated using the functions:
   - `bold`
+  - `italic`
   - `dim`
   - `inverted`
   - `underlined`
@@ -342,6 +352,12 @@ Feel free to add your projects here:
 - [Fallout terminal hacking](https://github.com/gshigin/yet-another-fallout-terminal-hacking-game)
 - [Lazylist](https://github.com/zhuyongqi9/lazylist)
 - [TUISIC](https://github.com/Dark-Kernel/tuisic)
+- [inLimbo](https://github.com/nots1dd/inLimbo)
+- [BestEdrOfTheMarket](https://github.com/Xacone/BestEdrOfTheMarket)
+- [terminal-rain](https://github.com/Oakamoore/terminal-rain)
+- [keywords](https://github.com/Oakamoore/keywords) ([Play web version :heart:](https://oakamoore.itch.io/keywords))
+- [FTB - tertminal file browser](https://github.com/Cyxuan0311/FTB)
+- [SHOOT!](https://github.com/ShingZhanho/ENGG1340-Project-25Spring)
 
 ### [cpp-best-practices/game_jam](https://github.com/cpp-best-practices/game_jam)
 
@@ -358,39 +374,67 @@ 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)
 
-## Utilization
+## 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.
 ```cmake
 include(FetchContent)
-
 FetchContent_Declare(ftxui
   GIT_REPOSITORY https://github.com/ArthurSonzogni/ftxui
-  GIT_TAG v5.0.0
+  GIT_TAG v6.1.9
 )
+FetchContent_MakeAvailable(ftxui)
 
-FetchContent_GetProperties(ftxui)
-if(NOT ftxui_POPULATED)
-  FetchContent_Populate(ftxui)
-  add_subdirectory(${ftxui_SOURCE_DIR} ${ftxui_BINARY_DIR} EXCLUDE_FROM_ALL)
-endif()
+target_link_libraries(your_target PRIVATE
+    # Chose a submodule
+    ftxui::component
+    ftxui::dom
+    ftxui::screen
+)
 ```
 
+# Build using Bazel
+
+**MODULE.bazel**
+```starlark
+bazel_dep(
+    name = "ftxui",
+    version = "v6.1.9",
+)
+```
+
+**BUILD.bazel**
+```starlark
+cc_binary(
+    name = "your_target",
+    srcs = ["your_source.cc"],
+    deps = [
+        "@ftxui//:ftxui_component",
+        "@ftxui//:ftxui_dom",
+        "@ftxui//:ftxui_screen",
+    ],
+)
+```
+
+
+# Build with something else:
 If you don't, FTXUI may be used from the following packages:
-- [vcpkg](https://vcpkgx.com/details.html?package=ftxui)
-- [Arch Linux PKGBUILD](https://aur.archlinux.org/packages/ftxui-git/).
-- [conan.io](https://conan.io/center/ftxui)
-- [openSUSE](https://build.opensuse.org/package/show/devel:libraries:c_c++/ftxui)
-- 
-[![Packaging status](https://repology.org/badge/vertical-allrepos/ftxui.svg)](https://repology.org/project/ftxui/versions)
+- CMake [FetchContent]([https://bewagner.net/programming/2020/05/02/cmake-fetchcontent/](https://cmake.org/cmake/help/latest/module/FetchContent.html)) (preferred),
+- [Bazel](https://registry.bazel.build/modules/ftxui),
+- [vcpkg](https://vcpkg.link/ports/ftxui),
+- [Conan](https://conan.io/center/recipes/ftxui)
+- [Debian package](https://tracker.debian.org/pkg/ftxui),
+- [Ubuntu package](https://launchpad.net/ubuntu/+source/ftxui),
+- [Arch Linux](https://aur.archlinux.org/packages/ftxui/),
+- [OpenSUSE](https://build.opensuse.org/package/show/devel:libraries:c_c++/ftxui),
+[![Packaging status](https://repology.org/badge/vertical-allrepos/libftxui.svg)](https://repology.org/project/libftxui/versions)
+
 
 If you choose to build and link FTXUI yourself, `ftxui-component` must be first in the linking order relative to the other FTXUI libraries, i.e.
 ```bash
 g++ . . . -lftxui-component -lftxui-dom -lftxui-screen . . .
 ```
 
-
-
 ## Contributors
 
 <a href="https://github.com/ArthurSonzogni/FTXUI/graphs/contributors">

WORKSPACE.bazel

@@ -0,0 +1,4 @@
+# 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.
+workspace(name = "ftxui")

bazel/ftxui.bzl

@@ -0,0 +1,104 @@
+# ftxui_common.bzl
+
+load("@rules_cc//cc:defs.bzl", "cc_library")
+load("@rules_cc//cc:defs.bzl", "cc_binary")
+
+# Microsoft terminal is a bit buggy ¯\_(ツ)_/¯ and MSVC uses bad defaults.
+def windows_copts():
+    MSVC_COPTS = [
+      # Microsoft Visual Studio must decode sources files as UTF-8.
+      "/utf-8",
+
+      # Microsoft Visual Studio must interpret the codepoint using unicode.
+      "/DUNICODE",
+      "/D_UNICODE",
+
+      # Fallback for Microsoft Terminal.
+      # This
+      # - Replace missing font symbols by others.
+      # - Reduce screen position pooling frequency to deals against a Microsoft
+      #   race condition. This was fixed in 2020, but clients never not updated.
+      #   - https://github.com/microsoft/terminal/pull/7583
+      #   - https://github.com/ArthurSonzogni/FTXUI/issues/136
+      "/DFTXUI_MICROSOFT_TERMINAL_FALLBACK",
+    ]
+
+    WINDOWS_COPTS = [
+      # Fallback for Microsoft Terminal.
+      # This
+      # - Replace missing font symbols by others.
+      # - Reduce screen position pooling frequency to deals against a Microsoft
+      #   race condition. This was fixed in 2020, but clients are still using
+      #   old versions.
+      #   - https://github.com/microsoft/terminal/pull/7583
+      #   - https://github.com/ArthurSonzogni/FTXUI/issues/136
+      "-DFTXUI_MICROSOFT_TERMINAL_FALLBACK",
+    ];
+    
+    return select({
+        # MSVC:
+        "@rules_cc//cc/compiler:msvc-cl": MSVC_COPTS,
+        "@rules_cc//cc/compiler:clang-cl": MSVC_COPTS,
+        "@platforms//os:windows": 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 = [],
+        hdrs = [],
+        linkopts = [],
+        deps = []):
+
+    cc_library(
+        name = name,
+        srcs = srcs,
+        hdrs = hdrs,
+        linkopts = linkopts,
+        deps = deps,
+        strip_include_prefix = "",
+        include_prefix = "",
+        includes = [
+            "include",
+            "src",
+        ],
+        copts = windows_copts(),
+        visibility = ["//visibility:public"],
+    )
+
+# Compile all the examples in the examples/ directory.
+# This is useful to check the Bazel is always synchronized against CMake
+# definitions.
+def generate_examples():
+    cpp_files = native.glob(["examples/**/*.cpp"])
+
+    for src in cpp_files:
+        # Skip failing examples due to the color_info_sorted_2d.ipp dependency.
+        if src == "examples/component/homescreen.cpp" or \
+           src == "examples/dom/color_info_palette256.cpp" or \
+           src == "examples/dom/color_gallery.cpp":
+            continue
+
+        # Turn "examples/component/button.cpp" → "example_component_button"
+        name = src.replace("/", "_").replace(".cpp", "")
+
+        cc_binary(
+            name = name,
+            srcs = [src],
+            deps = [
+              ":component",
+              ":dom",
+              ":screen",
+            ],
+            copts = windows_copts(),
+        )

cmake/ftxui_set_options.cmake

@@ -83,10 +83,6 @@ function(ftxui_set_options library)
       target_compile_options(${library} PRIVATE "-Wpedantic")
       target_compile_options(${library} PRIVATE "-Wshadow")
       target_compile_options(${library} PRIVATE "-Wunused")
-      
-      if (CMAKE_CXX_COMPILER_ID STREQUAL "GNU")
-        target_compile_options(${library} PRIVATE "-Wuseless-cast")
-      endif()
     endif()
   endif()
 

cmake/ftxui_test.cmake

@@ -13,6 +13,7 @@ add_executable(ftxui-tests
   src/ftxui/component/component_test.cpp
   src/ftxui/component/component_test.cpp
   src/ftxui/component/container_test.cpp
+  src/ftxui/component/dropdown_test.cpp
   src/ftxui/component/hoverable_test.cpp
   src/ftxui/component/input_test.cpp
   src/ftxui/component/menu_test.cpp
@@ -38,8 +39,10 @@ add_executable(ftxui-tests
   src/ftxui/dom/gridbox_test.cpp
   src/ftxui/dom/hbox_test.cpp
   src/ftxui/dom/hyperlink_test.cpp
+  src/ftxui/dom/italic_test.cpp
   src/ftxui/dom/linear_gradient_test.cpp
   src/ftxui/dom/scroll_indicator_test.cpp
+  src/ftxui/dom/selection_test.cpp
   src/ftxui/dom/separator_test.cpp
   src/ftxui/dom/spinner_test.cpp
   src/ftxui/dom/table_test.cpp

doc/CMakeLists.txt

@@ -8,13 +8,53 @@ if (NOT DOXYGEN_FOUND)
   return()
 endif()
 
+include(FetchContent)
+FetchContent_Declare(
+    doxygen-awesome-css
+    GIT_REPOSITORY https://github.com/jothepro/doxygen-awesome-css.git
+    GIT_TAG v2.3.4
+
+)
+FetchContent_MakeAvailable(doxygen-awesome-css)
+FetchContent_GetProperties(doxygen-awesome-css SOURCE_DIR AWESOME_CSS_DIR)
+
 # Generate example list for documentation
-set(EXAMPLE_LIST "${CMAKE_CURRENT_BINARY_DIR}/example_list.md")
-file(WRITE ${EXAMPLE_LIST} "# Examples")
+set(DOM_EXAMPLES "")
+set(COMPONENT_EXAMPLES "")
+
 get_property(EXAMPLES GLOBAL PROPERTY FTXUI::EXAMPLES)
-foreach(EXAMPLE IN LISTS EXAMPLES)
-  file(APPEND ${EXAMPLE_LIST} "\n@example examples/${EXAMPLE}.cpp")
-endforeach(EXAMPLE IN LISTS EXAMPLES)
+
+foreach(example IN LISTS EXAMPLES)
+  if(example MATCHES "^dom/.*")
+    list(APPEND DOM_EXAMPLES "${example}")
+  elseif(example MATCHES "^component/.*")
+    list(APPEND COMPONENT_EXAMPLES "${example}")
+  else()
+    message(ERROR "Unknown example '${example}'")
+  endif()
+endforeach()
+
+macro(write_example_list file title page examples)
+  file(APPEND "${file}" "@page ${page} ${title}\n")
+  file(APPEND "${file}" "@tableofcontents\n")
+
+  foreach(example IN LISTS ${examples})
+    get_filename_component(name "${example}" NAME_WE)
+    file(APPEND "${file}" "# ${name}\n")
+    file(APPEND "${file}" "@include examples/${example}.cpp\n")
+    file(APPEND "${file}" "@example examples/${example}.cpp\n")
+  endforeach()
+
+endmacro()
+
+write_example_list("${CMAKE_CURRENT_BINARY_DIR}/dom_examples.md"
+  "Example"
+  module-dom-examples
+  DOM_EXAMPLES)
+write_example_list("${CMAKE_CURRENT_BINARY_DIR}/component_examples.md"
+  "Example"
+  module-component-examples
+  COMPONENT_EXAMPLES)
 
 configure_file(Doxyfile.in Doxyfile @ONLY)
 

doc/doxygen_extra.css

@@ -1,323 +0,0 @@
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- *  Source:  https://github.com/sindresorhus/github-markdown-css
- *  License: MIT <20> Sindre Sorhus
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-
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-
-body, table, div, p, dl {
-  -ms-text-size-adjust: 100%;
-  -webkit-text-size-adjust: 100%;
-  line-height: 1.5;
-  color: #24292e;
-  font-family: -apple-system, BlinkMacSystemFont, "Segoe UI", Helvetica, Arial, sans-serif;
-  font-size: 16px;
-  word-wrap: break-word;
-}
-
-b {
-  font-weight: 600;
-}
-
-/* @group Heading Levels */
-
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-  font-weight: 600;
-  line-height: 1.25;
-  margin-top: 24px;
-  margin-bottom: 16px;
-}
-
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-  font-size: 2em;
-  padding-bottom: 0.3em;
-  border-bottom: 1px solid #eaecef;
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-  font-size: 0.875em;
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-
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-  font-size: 0.85em;
-  color: #6a737d;
-}
-
-a {
-  background-color: transparent;
-  color: #0366d6;
-  text-decoration: none;
-  font-weight: normal;
-}
-
-.contents a:visited {
-  color: #0366d6;
-}
-
-a:active, a:hover {
-  outline-width: 0;
-}
-
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-  text-decoration: underline;
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-  color: inherit;
-  text-decoration: none;
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-a.el {
-  font-weight: normal;
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-
-.image {
-  text-align: left;
-}
-
-.tip {
-  background-image: url(tip.png);
-  background-position: left center;
-  background-repeat: no-repeat;
-  padding-left: 30px;
-  margin-top: 1em;
-  margin-bottom: 1em;
-  min-height: 31px;
-  display: block;
-  font-style:italic;
-}
-
-.warn {
-  background-image: url(warn.png);
-  background-position: left center;
-  background-repeat: no-repeat;
-  padding-left: 48px;
-  margin-top: 1em;
-  margin-bottom: 1em;
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-}
-
-#projectname {
-  font-family: -apple-system, BlinkMacSystemFont, "Segoe UI", Helvetica, Arial, sans-serif;
-  font-size: 2em;
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-#projectbrief {
-  font-family: -apple-system, BlinkMacSystemFont, "Segoe UI", Helvetica, Arial, sans-serif;
-  font-size: 0.8em;
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-#projectnumber {
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-  font-size: 1em;
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-div.contents {
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-  margin-left: auto;
-  margin-right: auto;
-  margin-bottom: 10px;
-  border: 1px solid #d1d5da;
-  border-radius: 2px;
-}
-
-div.toc {
-  border: 0 none;
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-
-div.header {
-  width: 980px;
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-  margin-top: 10px;
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-  background-color: #f6f8fa;
-  border: 1px solid #d1d5da;
-}
-
-div.headertitle {
-  padding: 0;
-}
-
-.title ol {
-  margin: 0;
-}
-
-.title ol li {
-  list-style-type: none;
-}
-
-.ui-resizable-e {
-  background: none;
-  background-color: #E6E6E6;
-}
-
-div.fragment {
-  background-color: #f3f3f3;
-  border-radius:5px;
-  border: 0 solid;
-  border: none;
-  padding:16px;
-  transition: all 0.5s ease-in-out;
-}
-
-div.fragment:hover {
-  background-color: #e9e9e9;
-  box-shadow: 0 5px 10px -5px rgb(0,0,0,0.5) inset;
-}
-
-div.line {
-  font-family: "SFMono-Regular", Consolas, "Liberation Mono", Menlo, Courier, monospace;
-  font-size: 90%;
-  font-variant-numeric: tabular-nums lining-nums;
-  font-kerning: none;
-  -webkit-transition-duration: 0;
-  -moz-transition-duration: 0;
-  -ms-transition-duration: 0;
-  -o-transition-duration: 0;
-  transition-duration: 0;
-}
-
-div.line.glow {
-  background-color: auto;
-  box-shadow: none;
-}
-
-/* @group Code Colorization */
-span.keyword {
-  color: #808000
-}
-
-span.keywordtype {
-  color: #808000
-}
-
-span.keywordflow {
-  color: #808000
-}
-
-span.comment {
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-}
-
-span.preprocessor {
-  color: #800000
-}
-
-span.stringliteral {
-  color: #000080
-}
-
-span.charliteral {
-  color: #000080
-}
-
-blockquote {
-  background-color: #EEEEEE;
-  border-left: 2px solid #606060;
-  margin: 0 24px 0 4px;
-  padding: 0 12px 0 16px;
-}
-
-/* @end */
-
-.arrow {
-  box-sizing: content-box;
-}
-
-img {
-  max-width: 100%;
-  max-height: 100%;
-}
-
-#nav-tree {
-  background-image: none;
-  background-color: white;
-}
-
-#nav-tree .label {
-  font-family: -apple-system, BlinkMacSystemFont, "Segoe UI", Helvetica, Arial, sans-serif;
-  font-size: 14px;
-}
-
-#side-nav {
-  width: 25%;
-  max-width: 50%;
-}
-
-.memtitle {
-  background-image: none;
-}
-
-.memproto {
-  text-shadow: none;
-  /* opera specific markup */
-  box-shadow: none;
-  /* firefox specific markup */
-  -moz-box-shadow: none;
-  -moz-border-radius-topright: 4px;
-  /* webkit specific markup */
-  -webkit-box-shadow: none;
-  -webkit-border-top-right-radius: 4px;
-}
-
-.memdoc {
-  background-image:none;
-  background-repeat:repeat-x;
-  background-color: #FFFFFF;
-  /* opera specific markup */
-  box-shadow: none;
-  /* firefox specific markup */
-  -moz-box-shadow: none;
-  /* webkit specific markup */
-  -webkit-box-shadow: none;
-}
-
-#main-menu {
-  background: none;
-  border-bottom: 1px solid black;
-}
-
-#main-menu li {
-  border: none !important;
-  transition: all 0.1s ease-in-out;
-}
-
-#main-menu li:hover {
-  color:black;
-  background-color:black;
-}
-
-.sm-dox a, .sm-dox a:focus, .sm-dox a:active, .sm-dox a:hover, .sm-dox a.highlighted {
-  background-image:none;
-}
-
-#titlearea {
-  margin: 8px;
-  border: none;
-}

doc/doxygen_footer.html

@@ -1,10 +0,0 @@
-<!-- HTML footer for doxygen 1.8.14-->
-<!-- start footer part -->
-<!--BEGIN GENERATE_TREEVIEW-->
-<div id="nav-path" class="navpath"><!-- id is needed for treeview function! -->
-</div>
-<!--END GENERATE_TREEVIEW-->
-<!--BEGIN !GENERATE_TREEVIEW-->
-<!--END !GENERATE_TREEVIEW-->
-</body>
-</html>

doc/doxygen_header.html

@@ -1,59 +0,0 @@
-<!-- HTML header for doxygen 1.8.14-->
-<!DOCTYPE html PUBLIC "-//W3C//DTD XHTML 1.0 Transitional//EN" "http://www.w3.org/TR/xhtml1/DTD/xhtml1-transitional.dtd">
-<html xmlns="http://www.w3.org/1999/xhtml">
-<head>
-<meta http-equiv="cache-control" content="max-age=86400"/>
-<meta http-equiv="Content-Type" content="text/xhtml;charset=UTF-8"/>
-<meta http-equiv="X-UA-Compatible" content="IE=9"/>
-<meta name="generator" content="Doxygen $doxygenversion"/>
-<meta name="viewport" content="width=device-width, initial-scale=1"/>
-<!--BEGIN PROJECT_NAME--><title>$projectname: $title</title><!--END PROJECT_NAME-->
-<!--BEGIN !PROJECT_NAME--><title>$title</title><!--END !PROJECT_NAME-->
-<link href="$relpath^tabs.css" rel="stylesheet" type="text/css"/>
-<script type="text/javascript" src="$relpath^jquery.js"></script>
-<script type="text/javascript" src="$relpath^dynsections.js"></script>
-$treeview
-$search
-$mathjax
-<link href="$relpath^$stylesheet" rel="stylesheet" type="text/css" />
-$extrastylesheet
-</head>
-<body>
-<div id="top"><!-- do not remove this div, it is closed by doxygen! -->
-
-<!--BEGIN TITLEAREA-->
-<div id="titlearea">
-<table cellspacing="0" cellpadding="0">
- <tbody>
- <tr style="height: 56px;">
-  <!--BEGIN PROJECT_LOGO-->
-  <td id="projectlogo"><img alt="Logo" src="$relpath^$projectlogo"/></td>
-  <!--END PROJECT_LOGO-->
-  <!--BEGIN PROJECT_NAME-->
-  <td id="projectalign" style="padding-left: 0.5em;">
-   <div id="projectname">$projectname
-   <!--BEGIN PROJECT_NUMBER-->&#160;<span id="projectnumber">$projectnumber</span><!--END PROJECT_NUMBER-->
-   </div>
-   <!--BEGIN PROJECT_BRIEF--><div id="projectbrief">$projectbrief</div><!--END PROJECT_BRIEF-->
-  </td>
-  <!--END PROJECT_NAME-->
-  <!--BEGIN !PROJECT_NAME-->
-   <!--BEGIN PROJECT_BRIEF-->
-    <td style="padding-left: 0.5em;">
-    <div id="projectbrief">$projectbrief</div>
-    </td>
-   <!--END PROJECT_BRIEF-->
-  <!--END !PROJECT_NAME-->
-  <!--BEGIN DISABLE_INDEX-->
-   <!--BEGIN SEARCHENGINE-->
-   <td>$searchbox</td>
-   <!--END SEARCHENGINE-->
-  <!--END DISABLE_INDEX-->
- </tr>
- </tbody>
-</table>
-</div>
-<!--END TITLEAREA-->
-<!-- end header part -->
-
-

doc/doxygen_layout.xml

@@ -1,224 +0,0 @@
-<doxygenlayout version="1.0">
-  <!-- Navigation index tabs for HTML output -->
-  <navindex>
-    <tab type="mainpage" visible="yes" title="Tutorial"/>
-    <tab type="examples" visible="yes" title="" intro=""/>  
-    <tab type="filelist" visible="yes" title=""/>
-
-    <tab type="pages" visible="no" title="" intro=""/>
-    <tab type="modules" visible="yes" title="" intro=""/>
-    <tab type="namespaces" visible="yes" title="">
-      <tab type="namespacelist" visible="yes" title="" intro=""/>
-      <tab type="namespacemembers" visible="yes" title="" intro=""/>
-    </tab>
-    <tab type="interfaces" visible="no" title="">
-      <tab type="interfacelist" visible="yes" title="" intro=""/>
-      <tab type="interfaceindex" visible="$ALPHABETICAL_INDEX" title=""/> 
-      <tab type="interfacehierarchy" visible="yes" title="" intro=""/>
-    </tab>
-    <tab type="classes" visible="no" title="">
-      <tab type="classlist" visible="yes" title="" intro=""/>
-      <tab type="classindex" visible="$ALPHABETICAL_INDEX" title=""/> 
-      <tab type="hierarchy" visible="yes" title="" intro=""/>
-      <tab type="classmembers" visible="yes" title="" intro=""/>
-    </tab>
-    <tab type="structs" visible="no" title="">
-      <tab type="structlist" visible="yes" title="" intro=""/>
-      <tab type="structindex" visible="$ALPHABETICAL_INDEX" title=""/> 
-    </tab>
-    <tab type="exceptions" visible="no" title="">
-      <tab type="exceptionlist" visible="yes" title="" intro=""/>
-      <tab type="exceptionindex" visible="$ALPHABETICAL_INDEX" title=""/> 
-      <tab type="exceptionhierarchy" visible="yes" title="" intro=""/>
-    </tab>
-  </navindex>
-
-  <!-- Layout definition for a class page -->
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-    <memberdecl>
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-      <publictypes title=""/>
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-</doxygenlayout>

doc/footer.html

@@ -0,0 +1,17 @@
+<!-- HTML footer for doxygen 1.9.8-->
+<!-- start footer part -->
+<!--BEGIN GENERATE_TREEVIEW-->
+<div id="nav-path" class="navpath"><!-- id is needed for treeview function! -->
+  <ul>
+    $navpath
+    <li class="footer">$generatedby <a href="https://www.doxygen.org/index.html"><img class="footer" src="$relpath^doxygen.svg" width="104" height="31" alt="doxygen"/></a> $doxygenversion </li>
+  </ul>
+</div>
+<!--END GENERATE_TREEVIEW-->
+<!--BEGIN !GENERATE_TREEVIEW-->
+<hr class="footer"/><address class="footer"><small>
+$generatedby&#160;<a href="https://www.doxygen.org/index.html"><img class="footer" src="$relpath^doxygen.svg" width="104" height="31" alt="doxygen"/></a> $doxygenversion
+</small></address>
+<!--END !GENERATE_TREEVIEW-->
+</body>
+</html>

doc/getting-started.md

@@ -0,0 +1,62 @@
+@page getting-started Getting Started
+@tableofcontents
+
+![title-img](https://nsm09.casimages.com/img/2025/05/30//2505300816063242518595256.jpg)
+
+# Install FTXUI
+
+To set up FTXUI in your project, follow the [installation guide](installation.html), which provides instructions for multiple build systems and package managers.
+
+# Minimal Example
+
+Save the following code as `main.cpp`:
+
+```cpp
+#include <ftxui/dom/elements.hpp>
+#include <ftxui/screen/screen.hpp>
+#include <iostream>
+
+int main() {
+  using namespace ftxui;
+
+  Element document = hbox({
+    text("left")   | border,
+    text("middle") | border | flex,
+    text("right")  | border,
+  });
+
+  auto screen = Screen::Create(Dimension::Full(), Dimension::Fit(document));
+  Render(screen, document);
+  screen.Print();
+}
+```
+
+Build and run it using your preferred build system.  
+If unsure, start with one of the methods described in the [installation page](installation.html).
+
+Expected output:
+
+```
+┌────┐┌────────────────────────────────────┐┌─────┐
+│left││middle                              ││right│
+└────┘└────────────────────────────────────┘└─────┘
+```
+
+# Starter Template
+
+For a complete working project, clone the official starter repository:
+
+```bash
+git clone https://github.com/ArthurSonzogni/ftxui-starter
+```
+
+Follow the build instructions in the `README.md` of that repository.
+
+<div class="section_buttons">
+ 
+| Previous                          | Next                    |
+|:----------------------------------|------------------------:|
+| [Introduction](index.html) | [Modules](modules.html) |
+
+ 
+</div>

doc/header.html

@@ -0,0 +1,104 @@
+<!-- HTML header for doxygen 1.9.8-->
+<!DOCTYPE html PUBLIC "-//W3C//DTD XHTML 1.0 Transitional//EN" "https://www.w3.org/TR/xhtml1/DTD/xhtml1-transitional.dtd">
+<html xmlns="http://www.w3.org/1999/xhtml" lang="$langISO">
+<head>
+<meta http-equiv="Content-Type" content="text/xhtml;charset=UTF-8"/>
+<meta http-equiv="X-UA-Compatible" content="IE=11"/>
+<meta name="generator" content="Doxygen $doxygenversion"/>
+<meta name="viewport" content="width=device-width, initial-scale=1"/>
+<!--BEGIN PROJECT_NAME--><title>$projectname: $title</title><!--END PROJECT_NAME-->
+<!--BEGIN !PROJECT_NAME--><title>$title</title><!--END !PROJECT_NAME-->
+<link href="$relpath^tabs.css" rel="stylesheet" type="text/css"/>
+<!--BEGIN DISABLE_INDEX-->
+  <!--BEGIN FULL_SIDEBAR-->
+<script type="text/javascript">var page_layout=1;</script>
+  <!--END FULL_SIDEBAR-->
+<!--END DISABLE_INDEX-->
+<script type="text/javascript" src="$relpath^jquery.js"></script>
+<script type="text/javascript" src="$relpath^dynsections.js"></script>
+<script type="text/javascript" src="$relpath^doxygen-awesome-fragment-copy-button.js"></script>
+<script type="text/javascript" src="$relpath^doxygen-awesome-paragraph-link.js"></script>
+<script type="text/javascript" src="$relpath^doxygen-awesome-interactive-toc.js"></script>
+<script type="text/javascript" src="$relpath^doxygen-awesome-tabs.js"></script>
+<script type="text/javascript">
+    DoxygenAwesomeFragmentCopyButton.init()
+    DoxygenAwesomeParagraphLink.init()
+    DoxygenAwesomeInteractiveToc.init()
+    DoxygenAwesomeTabs.init()
+
+    window.addEventListener('DOMContentLoaded', function () {
+      document.querySelectorAll(".headertitle").forEach(div => {
+
+        // Hide progressively the title.
+        if (div.textContent != "Getting Started" &&
+            div.textContent != "Installation" &&
+            div.textContent != "Modules" &&
+            true) {
+          return;
+        }
+        div.style.display = "none";
+
+        // Show progressively the image.
+        const img = document.querySelector("img.inline");
+        img.style.maxHeight = "40vh";
+        img.style.maxWidth = "100%";
+        img.style.objectFit = "contain";
+      });
+    });
+</script>
+$treeview
+$search
+$mathjax
+$darkmode
+<link href="$relpath^$stylesheet" rel="stylesheet" type="text/css" />
+$extrastylesheet
+</head>
+<body>
+<!--BEGIN DISABLE_INDEX-->
+  <!--BEGIN FULL_SIDEBAR-->
+<div id="side-nav" class="ui-resizable side-nav-resizable"><!-- do not remove this div, it is closed by doxygen! -->
+  <!--END FULL_SIDEBAR-->
+<!--END DISABLE_INDEX-->
+
+<div id="top"><!-- do not remove this div, it is closed by doxygen! -->
+
+<!--BEGIN TITLEAREA-->
+<div id="titlearea">
+<table cellspacing="0" cellpadding="0">
+ <tbody>
+ <tr id="projectrow">
+  <!--BEGIN PROJECT_LOGO-->
+  <td id="projectlogo"><img alt="Logo" src="$relpath^$projectlogo"/></td>
+  <!--END PROJECT_LOGO-->
+  <!--BEGIN PROJECT_NAME-->
+  <td id="projectalign">
+   <div id="projectname">$projectname<!--BEGIN PROJECT_NUMBER--><span id="projectnumber">&#160;$projectnumber</span><!--END PROJECT_NUMBER-->
+   </div>
+   <!--BEGIN PROJECT_BRIEF--><div id="projectbrief">$projectbrief</div><!--END PROJECT_BRIEF-->
+  </td>
+  <!--END PROJECT_NAME-->
+  <!--BEGIN !PROJECT_NAME-->
+   <!--BEGIN PROJECT_BRIEF-->
+    <td>
+    <div id="projectbrief">$projectbrief</div>
+    </td>
+   <!--END PROJECT_BRIEF-->
+  <!--END !PROJECT_NAME-->
+  <!--BEGIN DISABLE_INDEX-->
+   <!--BEGIN SEARCHENGINE-->
+     <!--BEGIN !FULL_SIDEBAR-->
+    <td>$searchbox</td>
+     <!--END !FULL_SIDEBAR-->
+   <!--END SEARCHENGINE-->
+  <!--END DISABLE_INDEX-->
+ </tr>
+  <!--BEGIN SEARCHENGINE-->
+   <!--BEGIN FULL_SIDEBAR-->
+   <tr><td colspan="2">$searchbox</td></tr>
+   <!--END FULL_SIDEBAR-->
+  <!--END SEARCHENGINE-->
+ </tbody>
+</table>
+</div>
+<!--END TITLEAREA-->
+<!-- end header part -->

doc/installation.md

@@ -0,0 +1,42 @@
+
+@page installation Installation
+@tableofcontents
+
+![title-img](https://nsm09.casimages.com/img/2025/05/30//2505300816063242518595255.jpg)
+
+## Overview
+
+FTXUI can be integrated into your project using several build systems and package managers.  
+This page serves as an entry point for the available integration methods.
+
+## Supported Methods
+
+- @subpage installation_cmake
+- @subpage installation_bazel
+- @subpage installation_vcpkg
+- @subpage installation_conan
+- @subpage installation_manual
+
+## Next Steps
+
+Once FTXUI is installed:
+
+- [Getting Started](getting-started.html): Write and run your first program
+- [Examples](examples.html): See what FTXUI can do
+- Modules:
+  - [DOM](module-dom.html)
+  - [Component](module-component.html)
+  - [Screen](module-screen.html)
+
+## Contributions
+
+If you use another build system or package manager, feel free to contribute a guide.  
+You can also open a feature request on the [GitHub issue tracker](https://github.com/ArthurSonzogni/FTXUI/issues).
+
+<div class="section_buttons">
+ 
+| Previous          |
+|:------------------|
+| [Getting Started](getting-started.html) |
+ 
+</div>

doc/installation_bazel.md

@@ -0,0 +1,38 @@
+@page installation_bazel Bazel
+
+FTXUI can be integrated into your project using [Bazel](https://bazel.build)
+with Bzlmod (Bazel modules).
+
+The library is registered in the [Bazel Central Registry](https://registry.bazel.build/modules/ftxui)
+
+**MODULE.bazel**
+```starlark
+bazel_dep(name = "ftxui", version = "6.1.9")
+```
+
+**BUILD.bazel**
+```starlark
+cc_binary(
+    name = "main",
+    srcs = ["main.cpp"],
+    deps = [
+        "@ftxui//:component",
+        "@ftxui//:dom",
+        "@ftxui//:screen",
+    ],
+)
+```
+
+## Starter Project
+
+You can use the official Bazel starter project for a minimal working setup:
+
+- [ftxui-bazel (starter)](https://github.com/ArthurSonzogni/ftxui-bazel)
+ 
+<div class="section_buttons">
+ 
+| Previous          |
+|:------------------|
+| [Getting Started](getting-started.html) |
+ 
+</div>

doc/installation_cmake.md

@@ -0,0 +1,111 @@
+@page installation_cmake CMake
+
+@tableofcontents
+
+This page explains how to depend on FTXUI using [CMake](https://cmake.org).  
+
+# Methods of Integration
+
+## Using FetchContent
+
+This approach downloads FTXUI at configure time and doesn't require a system-wide install.
+
+```fortran 
+include(FetchContent)
+
+FetchContent_Declare(ftxui
+  GIT_REPOSITORY https://github.com/ArthurSonzogni/FTXUI
+  GIT_TAG v6.1.9  # Replace with a version, tag, or commit hash
+)
+
+FetchContent_MakeAvailable(ftxui)
+
+add_executable(main main.cpp)
+target_link_libraries(main
+  PRIVATE ftxui::screen
+  PRIVATE ftxui::dom
+  PRIVATE ftxui::component
+)
+```
+
+This ensures reproducible builds and easy dependency management.
+
+## Using find_package
+
+If FTXUI is installed system-wide or via a package manager (e.g. vcpkg or Conan), you can use:
+
+```fortran 
+fortranind_package(ftxui REQUIRED)
+
+add_executable(main main.cpp)
+target_link_libraries(main
+  PRIVATE ftxui::screen
+  PRIVATE ftxui::dom
+  PRIVATE ftxui::component
+)
+```
+
+Make sure the package is visible in your `CMAKE_PREFIX_PATH`.
+
+## Using git submodule
+
+You can also add FTXUI as a [Git submodule](https://git-scm.com/book/en/v2/Git-Tools-Submodules), keeping it as part of your repository:
+
+```fortran
+git submodule add https://github.com/ArthurSonzogni/FTXUI external/ftxui
+git submodule update --init --recursive
+```
+
+When cloning a repository that already includes FTXUI as a submodule, make sure to fetch submodules with:
+
+```
+git clone --recurse-submodules <your-repo>
+# Or, if already cloned:
+git submodule update --init --recursive
+```
+
+Then in your `CMakeLists.txt`:
+
+```fortran
+add_subdirectory(external/ftxui)
+
+add_executable(main main.cpp)
+target_link_libraries(main
+  PRIVATE ftxui::screen
+  PRIVATE ftxui::dom
+  PRIVATE ftxui::component
+)
+```
+
+This approach works well if you want to vendor FTXUI in your own repository.
+
+# Optional CMake Flags
+
+FTXUI supports the following CMake options:
+
+| Option                            | Description                   | Default |
+| --------------------------------- | ----------------------------- | ------- |
+| FTXUI_BUILD_EXAMPLES              | Build bundled examples        | OFF     |
+| FTXUI_BUILD_DOCS                  | Build the documentation       | OFF     |
+| FTXUI_BUILD_TESTS                 | Enable tests                  | OFF     |
+| FTXUI_ENABLE_INSTALL              | Generate install targets      | ON      |
+| FTXUI_MICROSOFT_TERMINAL_FALLBACK | Improve Windows compatibility | ON/OFF  |
+
+To enable an option:
+
+```
+cmake -DFTXUI_BUILD_EXAMPLES=ON ..
+```
+
+# Verifying Integration
+
+To confirm the setup is working, build and run a minimal example.
+If you need a complete template, see: [ftxui-starter](https://github.com/ArthurSonzogni/ftxui-starter)
+
+<div class="section_buttons">
+ 
+| Previous          |
+|:------------------|
+| [Getting Started](getting-started.html) |
+ 
+</div>

doc/installation_conan.md

@@ -0,0 +1,20 @@
+@page installation_conan Conan
+@tableofcontents
+
+## Conan Package
+
+Unofficial support for FTXUI exists on Conan Center:
+
+- https://conan.io/center/recipes/ftxui
+
+## TODO
+
+This page is incomplete. If you use FTXUI with Conan and can provide a minimal working setup, feel free to contribute.
+
+<div class="section_buttons">
+ 
+| Previous          |
+|:------------------|
+| [Getting Started](getting-started.html) |
+ 
+</div>

doc/installation_vcpkg.md

@@ -0,0 +1,20 @@
+@page installation_vcpkg Vcpkg
+@tableofcontents
+
+## Vcpkg Package
+
+FTXUI is available in the Vcpkg registry:
+
+- https://vcpkg.link/ports/ftxui
+
+## TODO
+
+This page is incomplete. If you use FTXUI with Vcpkg, please help improve this page by contributing working configuration examples.
+
+<div class="section_buttons">
+ 
+| Previous          |
+|:------------------|
+| [Getting Started](getting-started.html) |
+ 
+</div>

doc/introduction.md

@@ -0,0 +1,75 @@
+@mainpage Introduction
+@tableofcontents
+
+<img src="https://github.com/ArthurSonzogni/FTXUI/assets/4759106/6925b6da-0a7e-49d9-883c-c890e1f36007" alt="Demo image"></img>
+
+**FTXUI** is simple cross-platform C++ library for terminal based user interfaces!
+
+# Feature
+ * Functional style. Inspired by
+   [1](https://hackernoon.com/building-reactive-terminal-interfaces-in-c-d392ce34e649?gi=d9fb9ce35901)
+   and [React](https://reactjs.org/)
+ * No dependencies
+ * **Cross platform**.
+ * Simple and elegant syntax (in my opinion)
+ * Keyboard & mouse navigation.
+ * Support for [UTF8](https://en.wikipedia.org/wiki/UTF-8) and [fullwidth chars](https://en.wikipedia.org/wiki/Halfwidth_and_fullwidth_forms) (→ 测试)
+ * Support for animations. [Demo 1](https://arthursonzogni.github.io/FTXUI/examples/?file=component/menu_underline_animated_gallery), [Demo 2](https://arthursonzogni.github.io/FTXUI/examples/?file=component/button_style)
+ * Support for drawing. [Demo](https://arthursonzogni.github.io/FTXUI/examples/?file=component/canvas_animated)
+ * Learn by [examples](#documentation), and [tutorials](#documentation)
+ * Multiple build system and packages: 
+ * Good practices: documentation, tests, fuzzers, performance tests, automated CI, automated packaging, etc...
+
+# Example
+
+```cpp
+#include <ftxui/dom/elements.hpp>
+#include <ftxui/screen/screen.hpp>
+#include <iostream>
+
+int main() {
+  using namespace ftxui;
+
+  // Create a simple document with three text elements.
+  Element document = hbox({
+    text("left")   | border,
+    text("middle") | border | flex,
+    text("right")  | border,
+  });
+
+  // Create a screen with full width and height fitting the document.
+  auto screen = Screen::Create(
+    Dimension::Full(),       // Width
+    Dimension::Fit(document) // Height
+  );
+
+  // Render the document onto the screen.
+  Render(screen, document);
+
+  // Print the screen to the console.
+  screen.Print();
+}
+```
+
+Expected output:
+
+```
+┌────┐┌────────────────────────────────────┐┌─────┐
+│left││middle                              ││right│
+└────┘└────────────────────────────────────┘└─────┘
+```
+
+# Supported Platforms
+
+- Linux
+- MacOS
+- Windows
+- WebAssembly
+
+<div class="section_buttons">
+ 
+|                                  Next |
+|--------------------------------------:|
+| [Getting Started](getting-started.html) |
+ 
+</div>

doc/mainpage.md

@@ -1,894 +0,0 @@
-\mainpage
-
-# Introduction {#introduction}
-
-Welcome to the FTXUI documentation!
-
-This is a brief tutorial. You are also encouraged to self-learn by reading the
-[examples](./examples.html).
-
-@tableofcontents 
-
-**Short example**
-
-To build a single frame, you need create an `ftxui::Element`, and display it on
-a `ftxui::Screen`.
-
-**main.cpp**
-```cpp
-#include <ftxui/dom/elements.hpp>
-#include <ftxui/screen/screen.hpp>
-#include <iostream>
-
-int main(void) {
-  using namespace ftxui;
-
-  // Define the document
-  Element document =
-    hbox({
-      text("left")   | border,
-      text("middle") | border | flex,
-      text("right")  | border,
-    });
-
-  auto screen = Screen::Create(
-    Dimension::Full(),       // Width
-    Dimension::Fit(document) // Height
-  );
-  Render(screen, document);
-  screen.Print();
-
-  return EXIT_SUCCESS;
-}
-```
-
-
-**output**
-```bash
-┌────┐┌────────────────────────────────────┐┌─────┐
-│left││middle                              ││right│
-└────┘└────────────────────────────────────┘└─────┘
-```
-
-## Configure {#configure}
-### Using CMake and find_package {#build-cmake-find-package}
-
-Assuming FTXUI is available or installed on the system.
-
-**CMakeLists.txt**
-```cmake
-cmake_minimum_required (VERSION 3.11)
-find_package(ftxui 5 REQUIRED)
-project(ftxui-starter LANGUAGES CXX VERSION 1.0.0)
-add_executable(ftxui-starter src/main.cpp)
-target_link_libraries(ftxui-starter
-  PRIVATE ftxui::screen
-  PRIVATE ftxui::dom
-  PRIVATE ftxui::component # Not needed for this example.
-)
-
-```
-
-### Using CMake and FetchContent {#build-cmake}
-
-If you want to fetch FTXUI using cmake:
-
-**CMakeLists.txt**
-```cmake
-cmake_minimum_required (VERSION 3.11)
-
-include(FetchContent)
-set(FETCHCONTENT_UPDATES_DISCONNECTED TRUE)
-FetchContent_Declare(ftxui
-  GIT_REPOSITORY https://github.com/ArthurSonzogni/ftxui
-  GIT_TAG main # Important: Specify a version or a commit hash here.
-)
-FetchContent_MakeAvailable(ftxui)
-
-project(ftxui-starter LANGUAGES CXX VERSION 1.0.0)
-add_executable(ftxui-starter src/main.cpp)
-target_link_libraries(ftxui-starter
-  PRIVATE ftxui::screen
-  PRIVATE ftxui::dom
-  PRIVATE ftxui::component # Not needed for this example.
-)
-```
-
-## Build
-
-```bash
-mkdir build && cd build
-cmake ..
-make
-./main
-```
-
-# List of modules. {#modules}
-
-The project is comprised of 3 modules:
-
-1. **ftxui/screen** defines a `ftxui::Screen`, a grid of `ftxui::Pixel`.
-
-2. **ftxui/dom** is the main module. It defines a hierarchical set of
-   `ftxui::Element`.  An element draws something on the `ftxui::Screen`. It is
-   responsive to the size of its container.
-
-3. **ftxui/component** The module is required if your program needs to respond
-   to user input. It defines a set of `ftxui::Component`. These components can
-   be utilized to navigate using the arrow keys *and/or* cursor. There are 
-   several builtin widgets like checkbox/inputbox/etc to interact with. You can
-   combine them, or even define your own custom components.
-
-# screen {#module-screen}
-
-This is the visual element of the program. It defines a `ftxui::Screen`, which
-is a grid of `ftxui::Pixel`. A Pixel represents a Unicode character and its
-associated style (bold, colors, etc.). The screen can be printed as a string
-using `ftxui::Screen::ToString()`. The following example highlights this
-process:
-
-```cpp
-  #include <ftxui/screen/screen.hpp>
-  #include <iostream>
-
-  int main(void) {
-    using namespace ftxui;
-    auto screen = Screen::Create(Dimension::Fixed(32), Dimension::Fixed(10));
-
-    auto& pixel = screen.PixelAt(9,9);
-    pixel.character = U'A';
-    pixel.bold = true;
-    pixel.foreground_color = Color::Blue;
-
-    std::cout << screen.ToString();
-    return EXIT_SUCCESS;
-  }
-```
-
-# dom {#module-dom}
-
-This module defines a hierarchical set of `ftxui::Element`. An element manages
-the layout and can be responsive to the terminal dimension changes. Note the
-following example where this module is used to create a simple layout with a
-number of operators:
-
-**Example:**
-```cpp
-// Define the document
-Element document = vbox({
-  text("The window") | bold | color(Color::Blue),
-  gauge(0.5)
-  text("The footer")
-});
-
-// Add a border, by calling the `ftxui::border` decorator function.
-document = border(document);
-
-// Add another border, using the pipe operator.
-document = document | border.
-
-// Add another border, using the |= operator.
-document |= border
-
-```
-
-**List of elements**
-
-The list of all elements are included and can be accessed by including the
-corresponding header file:
-```cpp
-#include <ftxui/dom/elements.hpp>
-```
-
-\include ftxui/dom/elements.hpp
-
-## text ## {#dom-text}
-
-The most simple widget. It displays a text.
-```cpp
-text("I am a piece of text");
-```
-```bash
-I am a piece of text.
-```
-
-## vtext {#dom-vtext}
-
-Identical to `ftxui::text`, but displayed vertically.
-
-Code:
-```cpp
-vtext("HELLO");
-```
-
-Terminal output:
-```bash
-H
-E
-L
-L
-O
-```
-
-## paragraph {#dom-paragraph}
-
-Similar to `ftxui::text`, but the individual word are wrapped along multiple
-lines, depending on the width of its container.
-
-Sample Code:
-```cpp
-paragraph("A very long text")
-```
-
-![ezgif com-gif-maker (4)](https://user-images.githubusercontent.com/4759106/147251370-983a06e7-6f41-4113-92b8-942f43d34d06.gif)
-
-For a more detailed example refer to [detailed example](https://arthursonzogni.github.io/FTXUI/examples_2dom_2paragraph_8cpp-example.html). Paragraph also includes a number of other variants as shown below:
-```cpp
-Element paragraph(std::string text);
-Element paragraphAlignLeft(std::string text);
-Element paragraphAlignRight(std::string text);
-Element paragraphAlignCenter(std::string text);
-Element paragraphAlignJustify(std::string text);
-```
-
-
-## border {#dom-border}
-
-Adds a border around an element.
-
-Code:
-```cpp
-border(text("The element"))
-```
-
-Terminal output:
-```bash
-┌───────────┐
-│The element│
-└───────────┘
-```
-
-You can achieve the same behavior by using the pipe operator.
-
-Code:
-```cpp
-text("The element") | border
-```
-
-Border also comes in a variety of styles as shown below:
-```cpp
-Element border(Element);
-Element borderLight(Element);
-Element borderHeavy(Element);
-Element borderDouble(Element);
-Element borderRounded(Element);
-Element borderEmpty(Element);
-Decorator borderStyled(BorderStyle);
-Decorator borderWith(Pixel);
-```
-
-
-## window ## {#dom-window}
-
-A `ftxui::window` is a `ftxui::border`, but with an additional header. To add a
-window around an element, wrap it and specify a string as the header.
-Code:
-```cpp
-window("The window", text("The element"))
-```
-
-Terminal output:
-```bash
-┌The window─┐
-│The element│
-└───────────┘
-```
-
-## separator {#dom-separator}
-
-Displays a vertical/horizontal line to visually split the content of a
-container in two.
-
-Code:
-```cpp
-border(
-  hbox({
-    text("Left"), 
-    separator(),
-    text("Right")
-  })
-)
-```
-
-Terminal output:
-```bash
-┌────┬─────┐
-│left│right│
-└────┴─────┘
-```
-
-
-Separators come in a variety of flavors as shown below:
-```cpp
-Element separator(void);
-Element separatorLight();
-Element separatorHeavy();
-Element separatorDouble();
-Element separatorEmpty();
-Element separatorStyled(BorderStyle);
-Element separator(Pixel);
-Element separatorCharacter(std::string);
-Element separatorHSelector(float left,
-                           float right,
-                           Color background,
-                           Color foreground);
-Element separatorVSelector(float up,
-                           float down,
-                           Color background,
-                           Color foreground);
-```
-
-## gauge {#dom-gauge}
-
-It constitutes a gauge. It can be used to represent a progress bar.
-
-Code:
-```cpp
-border(gauge(0.5))
-```
-
-Teminal output:
-```bash
-┌────────────────────────────────────────────────────────────────────────────┐
-│██████████████████████████████████████                                      │
-└────────────────────────────────────────────────────────────────────────────┘
-```
-
-Gauges can be displayed in many orientations as shown below:
-```cpp
-Element gauge(float ratio);
-Element gaugeLeft(float ratio);
-Element gaugeRight(float ratio);
-Element gaugeUp(float ratio);
-Element gaugeDown(float ratio);
-Element gaugeDirection(float ratio, GaugeDirection);
-```
-
-## graph {#dom-graph}
-
-@htmlonly
-<script id="asciicast-223726" src="https://asciinema.org/a/223726.js" async></script>
-@endhtmlonly
-
-See:
-```cpp
-Element graph(GraphFunction);
-```
-
-## Colors {#dom-colors}
-
-Most terminal consoles can display colored text and colored backgrounds. FTXUI
-supports every color palette:
-```cpp
-Decorator color(Color);
-Decorator bgcolor(Color);
-```
-
-
-Color [gallery](https://arthursonzogni.github.io/FTXUI/examples_2dom_2color_gallery_8cpp-example.html):
-![image](https://user-images.githubusercontent.com/4759106/147248595-04c7245a-5b85-4544-809d-a5984fc6f9e7.png)
-
-### Palette16 #{#dom-colors-palette-16}
-
-On most terminals the following colors are supported:
-- Default
-
-- Black
-- GrayDark
-- GrayLight
-
-- White
-
-- Blue
-- BlueLight
-
-- Cyan
-- CyanLight
-
-- Green
-- GreenLight
-
-- Magenta
-- MagentaLight
-
-- Red
-- RedLight
-
-- Yellow
-- YellowLight
-
-Example use of the above colors using the pipe operator:
-```cpp
-text("Blue foreground") | color(Color::Blue);
-text("Blue background") | bgcolor(Color::Blue);
-text("Black on white") | color(Color::Black) | bgcolor(Color::White);
-```
-
-### Palette256 #{#dom-colors-palette-256}
-
-On terminal supporting 256 colors. 
-@htmlonly
-<script id="asciicast-OAUc3n6QrkmrLt7XEEb8AzbLt" src="https://asciinema.org/a/OAUc3n6QrkmrLt7XEEb8AzbLt.js" async></script>
-@endhtmlonly
-
-```cpp
-text("HotPink") | color(Color::HotPink);
-```
-
-### TrueColor #{#dom-colors-true-color}
-
-On terminal supporting trueColor, you can directly use the 24bit RGB color
-space:
-
-Use the constructors below to specify the **RGB** or **HSV** values for your
-color:
-
-There are two constructors:
-```cpp
-ftxui::Color::RGB(uint8_t red, uint8_t green, uint8_t blue);
-ftxui::Color::HSV(uint8_t hue, uint8_t saturation, uint8_t value);
-```
-
-@htmlonly
-<script id="asciicast-dk5r8IcCH0aFIIgWG0keSEHMG" src="https://asciinema.org/a/dk5r8IcCH0aFIIgWG0keSEHMG.js" async></script>
-<script id="asciicast-xwzzghmqcqzIuyLwCpQFEqbEu" src="https://asciinema.org/a/xwzzghmqcqzIuyLwCpQFEqbEu.js" async></script>
-@endhtmlonly
-
-## LinearGradient #{#dom-linear-gradient}
-
-FTXUI supports linear gradient. Either on the foreground or the background.
-
-```cpp
-Decorator color(const LinearGradient&);
-Decorator bgcolor(const LinearGradient&);
-```
-
-A `ftxui::LinearGradient` is defined by an angle in degree, and a list of color
-stops.
-```cpp
-auto gradient = LinearGradient()
-  .Angle(45)
-  .AddStop(0.0, Color::Red)
-  .AddStop(0.5, Color::Green)
-  .AddStop(1.0, Color::Blue);
-```
-
-You can also use simplified constructors:
-```cpp
-LinearGradient(Color::Red, Color::Blue);
-```
-```cpp
-LinearGradient(45, Color::Red, Color::Blue);
-```
-
-See [demo](https://arthursonzogni.github.io/FTXUI/examples/?file=component/linear_gradient_gallery).
-
-
-## Style {#dom-style}
-In addition to colored text and colored backgrounds. Many terminals support text
-effects such as: `bold`, `dim`, `underlined`, `inverted`, `blink`.
-
-```cpp
-Element bold(Element);
-Element dim(Element);
-Element inverted(Element);
-Element underlined(Element);
-Element underlinedDouble(Element);
-Element strikethrough(Element);
-Element blink(Element);
-Decorator color(Color);
-Decorator bgcolor(Color);
-Decorator colorgrad(LinearGradient);
-Decorator bgcolorgrad(LinearGradient);
-```
-
-[Example](https://arthursonzogni.github.io/FTXUI/examples_2dom_2style_gallery_8cpp-example.html)
-
-![image](https://user-images.githubusercontent.com/4759106/147244118-380bf834-9e33-40df-9ff0-07c10f2598ef.png)
-
-To use these effects, simply wrap your elements with your desired effect:
-```cpp
-underlined(bold(text("This text is bold and underlined")))
-```
-
-Alternatively, use the pipe operator to chain it on your element:
-```cpp
-text("This text is bold") | bold | underlined
-```
-
-## Layout {#dom-layout}
-
-Enables elements to be arranged in the following ways:
-  - **Horizontally** with `ftxui::hbox`
-  - **Vertically** with `ftxui::vbox`
-  - **Inside a grid** with `ftxui::gridbox`
-  - **Wrapped along one direction** using the `ftxui::flexbox`.
-  
-[Example](https://arthursonzogni.github.io/FTXUI/examples_2dom_2vbox_hbox_8cpp-example.html) using `ftxui::hbox`, `ftxui::vbox` and `ftxui::filler`.
-
-![image](https://user-images.githubusercontent.com/4759106/147242524-7103b5d9-1a92-4e2d-ac70-b3d6740061e3.png)
-  
-  
-[Example](https://arthursonzogni.github.io/FTXUI/examples_2dom_2gridbox_8cpp-example.htmlp)
-using `ftxui::gridbox`:
-
-![image](https://user-images.githubusercontent.com/4759106/147242972-0db1f2e9-0790-496f-86e6-ed2c604f7a73.png)
-
-[Example](https://github.com/ArthurSonzogni/FTXUI/blob/master/examples/dom/hflow.cpp)
-using flexbox:
-
-![image](https://user-images.githubusercontent.com/4759106/147243064-780ac7cc-605b-475f-94b8-cf7c4aed03a5.png)
-
-Checkout this
-[example](https://arthursonzogni.github.io/FTXUI/examples_2dom_2hflow_8cpp-example.html)
-and the associated
-[demo](https://arthursonzogni.github.io/FTXUI/examples/?file=component/flexbox).
-
-Element can also become flexible using the the `ftxui::flex` decorator.
-
-Code:
-```cpp
-  hbox({
-    text("left") | border ,
-    text("middle") | border | flex,
-    text("right") | border,
-  });
-```
-Terminal output:
-```bash
-┌────┐┌─────────────────────────────────────────────────────┐┌─────┐
-│left││middle                                               ││right│
-└────┘└─────────────────────────────────────────────────────┘└─────┘
-```
-
-Code:
-```cpp
-  hbox({
-    text("left") | border ,
-    text("middle") | border | flex,
-    text("right") | border | flex,
-  });
-```
-
-Terminal output:
-```bash
-┌────┐┌───────────────────────────────┐┌───────────────────────────────┐
-│left││middle                         ││right                          │
-└────┘└───────────────────────────────┘└───────────────────────────────┘
-```
-
-## Table {#dom-table}
-
-Enables easy formatting of data into a neat table like visual form.
-
-[Code example](https://arthursonzogni.github.io/FTXUI/examples_2dom_2table_8cpp-example.html):
-  
-![image](https://user-images.githubusercontent.com/4759106/147250766-77d8ec9e-cf2b-486d-9866-1fd9f1bd2e6b.png)
-
-## Canvas {#dom-canvas}
-
-See the API [<ftxui/dom/canvas.hpp>](./canvas_8hpp_source.html)
-
-```cpp
-  auto c = Canvas(100, 100);
-  c.DrawPointLine(10, 10, 80, 10, Color::Red);
-  auto element = canvas(c);
-```
-
-Drawing can be performed on a `ftxui::Canvas`, using braille, block, or simple
-characters:
-  
-Simple [example](https://github.com/ArthurSonzogni/FTXUI/blob/master/examples/dom/canvas.cpp):
-  
-![image](https://user-images.githubusercontent.com/4759106/147245843-76cc62fb-ccb4-421b-aacf-939f9afb42fe.png)
-
-Complex [example](https://github.com/ArthurSonzogni/FTXUI/blob/master/examples/component/canvas_animated.cpp):
-  
-![ezgif com-gif-maker (3)](https://user-images.githubusercontent.com/4759106/147250538-783a8246-98e0-4a25-b032-3bd3710549d1.gif)
-# component {#module-component}
-
-The `ftxui::component` module defines the logic that produces interactive
-components that respond to user events (keyboard, mouse, etc.).
-
-A `ftxui::ScreenInteractive` defines a main loop that renders a component.
-
-A `ftxui::Component` is a shared pointer to a `ftxui::ComponentBase`. The latter defines:
-  - `ftxui::ComponentBase::Render()`: How to render the interface.
-  - `ftxui::ComponentBase::OnEvent()`: How to react to events.
-  - `ftxui::ComponentBase::Add()`: Construct a parent/child relationship
-    between two components. The tree of component is used to define how to
-    navigate using the keyboard.
-
-`ftxui::Element` are used to render a single frame.
-
-`ftxui::Component` are used to render dynamic user interface, producing multiple
-frame, and updating its state on events.
-
-[Gallery](https://arthursonzogni.github.io/FTXUI/examples_2component_2gallery_8cpp-example.html) of multiple components. ([demo](https://arthursonzogni.github.io/FTXUI/examples/?file=component/gallery))
-
-![image](https://user-images.githubusercontent.com/4759106/147247330-b60beb9f-e665-48b4-81c0-4b01ee95bc66.png)
-
-All predefined components are available in
-["ftxui/dom/component.hpp"](./component_8hpp.html)
-
-\include ftxui/component/component.hpp
-
-## Input {#component-input}
-
-[Example](https://arthursonzogni.github.io/FTXUI/examples_2component_2input_8cpp-example.html):
-
-![image](https://user-images.githubusercontent.com/4759106/147247671-f1d6f606-1845-4e94-a4a0-d4273e9ae6bd.png)
-
-Produced by: `ftxui::Input()` from "ftxui/component/component.hpp"
-
-@htmlonly
-<script id="asciicast-223719" src="https://asciinema.org/a/223719.js" async></script>
-@endhtmlonly
-
-### Filtered input
-
-On can filter out the characters received by the input component, using
-`ftxui::CatchEvent`.
-
-```cpp
-std::string phone_number;
-Component input = Input(&phone_number, "phone number");
-
-// Filter out non-digit characters.
-input |= CatchEvent([&](Event event) {
-  return event.is_character() && !std::isdigit(event.character()[0]);
-});
-
-// Filter out characters past the 10th one.
-input |= CatchEvent([&](Event event) {
-  return event.is_character() && phone_number.size() >= 10;
-});
-```
-
-## Menu {#component-menu}
-
-Defines a menu object. It contains a list of entries, one of them is selected.
-
-[Example](https://arthursonzogni.github.io/FTXUI/examples_2component_2menu_8cpp-example.html):
-
-![image](https://user-images.githubusercontent.com/4759106/147247822-0035fd6f-bb13-4b3a-b057-77eb9291582f.png)
-
-
-Produced by: `ftxui::Menu()` from "ftxui/component/component.hpp"
-
-@htmlonly
-<script id="asciicast-223720" src="https://asciinema.org/a/223720.js" async></script>
-@endhtmlonly
-
-## Toggle {#component-toggle}
-
-A special kind of menu. The entries are displayed horizontally.
-
-[Example](https://arthursonzogni.github.io/FTXUI/examples_2component_2toggle_8cpp-example.html):
-
-![image](https://user-images.githubusercontent.com/4759106/147249383-e2201cf1-b7b8-4a5a-916f-d761e3e7ae40.png)
-
-Produced by: `ftxui::Toggle()` from "ftxui/component/component.hpp"
-
-@htmlonly
-<script id="asciicast-223722" src="https://asciinema.org/a/223722.js" async></script>
-@endhtmlonly
-
-## CheckBox {#component-checkbox}
-
-This component defines a checkbox. It is a single entry that can be turned
-on/off.
-
-[Example](https://arthursonzogni.github.io/FTXUI/examples_2component_2checkbox_8cpp-example.html):
-
-![image](https://user-images.githubusercontent.com/4759106/147246646-b86926a9-1ef9-4efb-af98-48a9b62acd81.png)
-
-Produced by: `ftxui::Checkbox()` from "ftxui/component/component.hpp"
-
-@htmlonly
-<script id="asciicast-223724" src="https://asciinema.org/a/223724.js" async></script>
-@endhtmlonly
-
-## RadioBox {#component-radiobox}
-
-A radiobutton component. This is a list of entries, where one can be turned on.
-
-[Example](https://arthursonzogni.github.io/FTXUI/examples_2component_2radiobox_8cpp-example.html):
-  
-![image](https://user-images.githubusercontent.com/4759106/147246401-809d14a5-6621-4e36-8dd9-a2d75ef2a94e.png)
-
-Produced by: `ftxui::Radiobox()` from "ftxui/component/component.hpp"
-
-@htmlonly
-<script id="asciicast-223725" src="https://asciinema.org/a/223725.js" async></script>
-@endhtmlonly
-
-## Dropdown {#component-dropdown}
-
-A drop down menu is a component that when checked display a list of element for
-the user to select one.
-
-[Example](https://arthursonzogni.github.io/FTXUI/examples_2component_2dropdown_8cpp-example.html):
-
-![youtube-video-gif (3)](https://user-images.githubusercontent.com/4759106/147246982-1e821751-531c-4e1f-bc37-2fa290e143cd.gif)
-
-Produced by: `ftxui::Dropdown()` from "ftxui/component/component.hpp"
-
-## Slider {#component-slider}
-
-Represents a slider object that consists of a range with binned intermediate
-intervals. It can be created by `ftxui::Slider()`.
-
-[Example](https://arthursonzogni.github.io/FTXUI/examples_2component_2slider_8cpp-example.html):
-
-![image](https://user-images.githubusercontent.com/4759106/147249265-7e2cad75-082c-436e-affe-44a550c480ab.png)
-
-Produced by: `ftxui::Slider()` from "ftxui/component/component.hpp"
-
-## Renderer {#component-renderer}
-
-Produced by: `ftxui::Renderer()` from \ref ftxui/component/component.hpp. This
-component decorate another one by using a different function to render an
-interface.
-
-Example:
-```cpp
-auto inner = [...]
-
-auto renderer = Renderer(inner, [&] {
-  return inner->Render() | border
-});
-```
-
-`ftxui::Renderer` also supports the component decorator pattern:
-```cpp
-auto component = [...]
-component = component
-  | Renderer([](Element e) { return e | border))
-  | Renderer(bold)
-```
-
-As a short hand, you can also compose a component with an element decorator:
-```cpp
-auto component = [...]
-component = component | border | bold;
-```
-
-## CatchEvent {#component-catchevent}
-
-Produced by: `ftxui::CatchEvent()` from \ref ftxui/component/component.hpp.
-This component decorate others, catching events before the underlying component.
-
-Examples:
-```cpp
-auto screen = ScreenInteractive::TerminalOutput();
-auto renderer = Renderer([] {
-  return text("My interface");
-});
-auto component = CatchEvent(renderer, [&](Event event) {
-  if (event == Event::Character('q')) {
-    screen.ExitLoopClosure()();
-    return true;
-  }
-  return false;
-});
-screen.Loop(component);
-```
-
-The `ftxui::CatchEvent` can also be used as a decorator:
-```cpp
-component = component
-  | CatchEvent(handler_1)
-  | CatchEvent(handler_2)
-  | CatchEvent(handler_3)
-  ;
-```
-
-## Collapsible {#component-collapsible}
-
-Useful for visual elements whose visibility can be toggle on/off by the user.
-Essentially, this the combination of the `ftxui::Checkbox()` and
-`ftxui::Maybe()` components.
-
-```cpp
-auto collabsible = Collapsible("Show more", inner_element);
-```
-
-## Maybe {#component-maybe}
-
-Produced by: `ftxui::Maybe()` from \ref ftxui/component/component.hpp.
-This component can be utilized to show/hide any other component via a boolean or
-a predicate.
-
-Example with a boolean:
-```cpp
-bool show = true;
-auto component = Renderer([]{ return "Hello World!"; });
-auto maybe_component = Maybe(component, &show)
-```
-
-Example with a predicate:
-```cpp
-auto component = Renderer([]{ return "Hello World!"; });
-auto maybe_component = Maybe(component, [&] { return time > 10; })
-```
-
-As usual, `ftxui::Maybe` can also be used as a decorator:
-```cpp
-component = component
-  | Maybe(&a_boolean)
-  | Maybe([&] { return time > 10; })
-  ;
-```
-
-## Container {#component-container}
-
-### Horizontal {#component-horizontal}
-
-Produced by: `ftxui::Container::Horizontal()` from
-"ftxui/component/component.hpp". It displays a list of components horizontally
-and handle keyboard/mouse navigation.
-
-### Vertical {#component-vertical}
-
-Produced by: `ftxui::Container::Vertical()` from
-"ftxui/component/component.hpp". It displays a list of components vertically 
-and handles keyboard/mouse navigation.
-
-### Tab {#component-tab}
-
-Produced by: `ftxui::Container::Tab()` from
-"ftxui/component/component.hpp". It take a list of component and display only
-one of them. This is useful for implementing a tab bar.
-
-[Vertical](https://arthursonzogni.github.io/FTXUI/examples_2component_2tab_vertical_8cpp-example.html):
-  
-![ezgif com-gif-maker (1)](https://user-images.githubusercontent.com/4759106/147250144-22ff044a-4773-4ff7-a49c-12ba4034acb4.gif)
-
-[Horizontal](https://arthursonzogni.github.io/FTXUI/examples_2component_2tab_horizontal_8cpp-example.html):
-  
-  ![ezgif com-gif-maker (2)](https://user-images.githubusercontent.com/4759106/147250217-fe447e0f-7a99-4e08-948a-995087d9b40e.gif)
-
-
-## ResizableSplit  {#component-resizable-split}
-
-It defines a horizontal or vertical separation between two children components.
-The position of the split is variable and controllable using the mouse. 
-There are four possible splits:
-- `ftxui::ResizableSplitLeft()`
-- `ftxui::ResizableSplitRight()`
-- `ftxui::ResizableSplitTop()`
-- `ftxui::ResizableSplitBottom()`
-from "ftxui/component/component.hpp"
-
-[Example](https://arthursonzogni.github.io/FTXUI/examples_2component_2resizable_split_8cpp-example.html):
-
-![ezgif com-gif-maker](https://user-images.githubusercontent.com/4759106/147248372-c55512fe-9b96-4b08-a1df-d05cf2cae431.gif)  
-
-@htmlonly
-<script id="asciicast-tprMH2EdkUoMb7D2YxgMGgpzx" src="https://asciinema.org/a/tprMH2EdkUoMb7D2YxgMGgpzx.js" async></script>
-@endhtmlonly
-
-## Force a frame redraw. {#component-force-redraw}
-
-Typically, `ftxui::ScreenInteractive::Loop()` is responsible for drawing a new
-frame whenever a new group of events (e.g keyboard, mouse, window resize, etc.)
-has been processed. However, you might want to react to arbitrary events that
-are unknown to FTXUI. To accomplish this, you must post events using
-`ftxui::ScreenInteractive::PostEvent` (**this is thread safe**) via a thread.
-You will have to post the event `ftxui::Event::Custom`.
-
-Example:
-```cpp
-screen->PostEvent(Event::Custom);
-```

doc/module-component.md

@@ -0,0 +1,306 @@
+@page module-component Module component
+@tableofcontents
+
+The `ftxui::component` module defines the logic that produces interactive
+components that respond to user events (keyboard, mouse, etc.).
+
+The @subpage module-component-examples section provides a collection of examples.
+
+A `ftxui::ScreenInteractive` defines a main loop that renders a component.
+
+A `ftxui::Component` is a shared pointer to a `ftxui::ComponentBase`. The latter defines:
+  - `ftxui::ComponentBase::Render()`: How to render the interface.
+  - `ftxui::ComponentBase::OnEvent()`: How to react to events.
+  - `ftxui::ComponentBase::Add()`: Construct a parent/child relationship
+    between two components. The tree of component is used to define how to
+    navigate using the keyboard.
+
+`ftxui::Element` are used to render a single frame.
+
+`ftxui::Component` are used to render dynamic user interface, producing multiple
+frame, and updating its state on events.
+
+[Gallery](https://arthursonzogni.github.io/FTXUI/examples_2component_2gallery_8cpp-example.html) of multiple components. ([demo](https://arthursonzogni.github.io/FTXUI/examples/?file=component/gallery))
+
+![image](https://user-images.githubusercontent.com/4759106/147247330-b60beb9f-e665-48b4-81c0-4b01ee95bc66.png)
+
+All predefined components are available in
+["ftxui/dom/component.hpp"](./component_8hpp.html)
+
+\include{strip ftxui/component/component.hpp
+
+## Input {#component-input}
+
+[Example](https://arthursonzogni.github.io/FTXUI/examples_2component_2input_8cpp-example.html):
+
+![image](https://user-images.githubusercontent.com/4759106/147247671-f1d6f606-1845-4e94-a4a0-d4273e9ae6bd.png)
+
+Produced by: `ftxui::Input()` from "ftxui/component/component.hpp"
+
+@htmlonly
+<script id="asciicast-223719" src="https://asciinema.org/a/223719.js" async></script>
+@endhtmlonly
+
+### Filtered input
+
+On can filter out the characters received by the input component, using
+`ftxui::CatchEvent`.
+
+```cpp
+std::string phone_number;
+Component input = Input(&phone_number, "phone number");
+
+// Filter out non-digit characters.
+input |= CatchEvent([&](Event event) {
+  return event.is_character() && !std::isdigit(event.character()[0]);
+});
+
+// Filter out characters past the 10th one.
+input |= CatchEvent([&](Event event) {
+  return event.is_character() && phone_number.size() >= 10;
+});
+```
+
+## Menu {#component-menu}
+
+Defines a menu object. It contains a list of entries, one of them is selected.
+
+[Example](https://arthursonzogni.github.io/FTXUI/examples_2component_2menu_8cpp-example.html):
+
+![image](https://user-images.githubusercontent.com/4759106/147247822-0035fd6f-bb13-4b3a-b057-77eb9291582f.png)
+
+
+Produced by: `ftxui::Menu()` from "ftxui/component/component.hpp"
+
+@htmlonly
+<script id="asciicast-223720" src="https://asciinema.org/a/223720.js" async></script>
+@endhtmlonly
+
+## Toggle {#component-toggle}
+
+A special kind of menu. The entries are displayed horizontally.
+
+[Example](https://arthursonzogni.github.io/FTXUI/examples_2component_2toggle_8cpp-example.html):
+
+![image](https://user-images.githubusercontent.com/4759106/147249383-e2201cf1-b7b8-4a5a-916f-d761e3e7ae40.png)
+
+Produced by: `ftxui::Toggle()` from "ftxui/component/component.hpp"
+
+@htmlonly
+<script id="asciicast-223722" src="https://asciinema.org/a/223722.js" async></script>
+@endhtmlonly
+
+## CheckBox {#component-checkbox}
+
+This component defines a checkbox. It is a single entry that can be turned
+on/off.
+
+[Example](https://arthursonzogni.github.io/FTXUI/examples_2component_2checkbox_8cpp-example.html):
+
+![image](https://user-images.githubusercontent.com/4759106/147246646-b86926a9-1ef9-4efb-af98-48a9b62acd81.png)
+
+Produced by: `ftxui::Checkbox()` from "ftxui/component/component.hpp"
+
+@htmlonly
+<script id="asciicast-223724" src="https://asciinema.org/a/223724.js" async></script>
+@endhtmlonly
+
+## RadioBox {#component-radiobox}
+
+A radiobutton component. This is a list of entries, where one can be turned on.
+
+[Example](https://arthursonzogni.github.io/FTXUI/examples_2component_2radiobox_8cpp-example.html):
+  
+![image](https://user-images.githubusercontent.com/4759106/147246401-809d14a5-6621-4e36-8dd9-a2d75ef2a94e.png)
+
+Produced by: `ftxui::Radiobox()` from "ftxui/component/component.hpp"
+
+@htmlonly
+<script id="asciicast-223725" src="https://asciinema.org/a/223725.js" async></script>
+@endhtmlonly
+
+## Dropdown {#component-dropdown}
+
+A drop down menu is a component that when checked display a list of element for
+the user to select one.
+
+[Example](https://arthursonzogni.github.io/FTXUI/examples_2component_2dropdown_8cpp-example.html):
+
+![youtube-video-gif (3)](https://user-images.githubusercontent.com/4759106/147246982-1e821751-531c-4e1f-bc37-2fa290e143cd.gif)
+
+Produced by: `ftxui::Dropdown()` from "ftxui/component/component.hpp"
+
+## Slider {#component-slider}
+
+Represents a slider object that consists of a range with binned intermediate
+intervals. It can be created by `ftxui::Slider()`.
+
+[Example](https://arthursonzogni.github.io/FTXUI/examples_2component_2slider_8cpp-example.html):
+
+![image](https://user-images.githubusercontent.com/4759106/147249265-7e2cad75-082c-436e-affe-44a550c480ab.png)
+
+Produced by: `ftxui::Slider()` from "ftxui/component/component.hpp"
+
+## Renderer {#component-renderer}
+
+Produced by: `ftxui::Renderer()` from \ref ftxui/component/component.hpp. This
+component decorate another one by using a different function to render an
+interface.
+
+Example:
+```cpp
+auto inner = [...]
+
+auto renderer = Renderer(inner, [&] {
+  return inner->Render() | border
+});
+```
+
+`ftxui::Renderer` also supports the component decorator pattern:
+```cpp
+auto component = [...]
+component = component
+  | Renderer([](Element e) { return e | border))
+  | Renderer(bold)
+```
+
+As a short hand, you can also compose a component with an element decorator:
+```cpp
+auto component = [...]
+component = component | border | bold;
+```
+
+## CatchEvent {#component-catchevent}
+
+Produced by: `ftxui::CatchEvent()` from \ref ftxui/component/component.hpp.
+This component decorate others, catching events before the underlying component.
+
+Examples:
+```cpp
+auto screen = ScreenInteractive::TerminalOutput();
+auto renderer = Renderer([] {
+  return text("My interface");
+});
+auto component = CatchEvent(renderer, [&](Event event) {
+  if (event == Event::Character('q')) {
+    screen.ExitLoopClosure()();
+    return true;
+  }
+  return false;
+});
+screen.Loop(component);
+```
+
+The `ftxui::CatchEvent` can also be used as a decorator:
+```cpp
+component = component
+  | CatchEvent(handler_1)
+  | CatchEvent(handler_2)
+  | CatchEvent(handler_3)
+  ;
+```
+
+## Collapsible {#component-collapsible}
+
+Useful for visual elements whose visibility can be toggle on/off by the user.
+Essentially, this the combination of the `ftxui::Checkbox()` and
+`ftxui::Maybe()` components.
+
+```cpp
+auto collabsible = Collapsible("Show more", inner_element);
+```
+
+## Maybe {#component-maybe}
+
+Produced by: `ftxui::Maybe()` from \ref ftxui/component/component.hpp.
+This component can be utilized to show/hide any other component via a boolean or
+a predicate.
+
+Example with a boolean:
+```cpp
+bool show = true;
+auto component = Renderer([]{ return "Hello World!"; });
+auto maybe_component = Maybe(component, &show)
+```
+
+Example with a predicate:
+```cpp
+auto component = Renderer([]{ return "Hello World!"; });
+auto maybe_component = Maybe(component, [&] { return time > 10; })
+```
+
+As usual, `ftxui::Maybe` can also be used as a decorator:
+```cpp
+component = component
+  | Maybe(&a_boolean)
+  | Maybe([&] { return time > 10; })
+  ;
+```
+
+## Container {#component-container}
+
+### Horizontal {#component-horizontal}
+
+Produced by: `ftxui::Container::Horizontal()` from
+"ftxui/component/component.hpp". It displays a list of components horizontally
+and handle keyboard/mouse navigation.
+
+### Vertical {#component-vertical}
+
+Produced by: `ftxui::Container::Vertical()` from
+"ftxui/component/component.hpp". It displays a list of components vertically 
+and handles keyboard/mouse navigation.
+
+### Tab {#component-tab}
+
+Produced by: `ftxui::Container::Tab()` from
+"ftxui/component/component.hpp". It take a list of component and display only
+one of them. This is useful for implementing a tab bar.
+
+[Vertical](https://arthursonzogni.github.io/FTXUI/examples_2component_2tab_vertical_8cpp-example.html):
+  
+![ezgif com-gif-maker (1)](https://user-images.githubusercontent.com/4759106/147250144-22ff044a-4773-4ff7-a49c-12ba4034acb4.gif)
+
+[Horizontal](https://arthursonzogni.github.io/FTXUI/examples_2component_2tab_horizontal_8cpp-example.html):
+  
+  ![ezgif com-gif-maker (2)](https://user-images.githubusercontent.com/4759106/147250217-fe447e0f-7a99-4e08-948a-995087d9b40e.gif)
+
+
+## ResizableSplit  {#component-resizable-split}
+
+It defines a horizontal or vertical separation between two children components.
+The position of the split is variable and controllable using the mouse. 
+There are four possible splits:
+- `ftxui::ResizableSplitLeft()`
+- `ftxui::ResizableSplitRight()`
+- `ftxui::ResizableSplitTop()`
+- `ftxui::ResizableSplitBottom()`
+from "ftxui/component/component.hpp"
+
+[Example](https://arthursonzogni.github.io/FTXUI/examples_2component_2resizable_split_8cpp-example.html):
+
+![ezgif com-gif-maker](https://user-images.githubusercontent.com/4759106/147248372-c55512fe-9b96-4b08-a1df-d05cf2cae431.gif)  
+
+@htmlonly
+<script id="asciicast-tprMH2EdkUoMb7D2YxgMGgpzx" src="https://asciinema.org/a/tprMH2EdkUoMb7D2YxgMGgpzx.js" async></script>
+@endhtmlonly
+
+## Force a frame redraw. {#component-force-redraw}
+
+Typically, `ftxui::ScreenInteractive::Loop()` is responsible for drawing a new
+frame whenever a new group of events (e.g keyboard, mouse, window resize, etc.)
+has been processed. However, you might want to react to arbitrary events that
+are unknown to FTXUI. To accomplish this, you must post events using
+`ftxui::ScreenInteractive::PostEvent` (**this is thread safe**) via a thread.
+You will have to post the event `ftxui::Event::Custom`.
+
+Example:
+```cpp
+screen->PostEvent(Event::Custom);
+```
+
+If you don't need to process a new Event, you can use:
+```cpp
+screen->RequestAnimationFrame();
+```
+instead.

doc/module-dom.md

@@ -0,0 +1,468 @@
+@page module-dom Module dom
+@tableofcontents
+
+This module defines a hierarchical set of `ftxui::Element`. An element manages
+the layout and can be responsive to the terminal dimension changes. Note the
+following example where this module is used to create a simple layout with a
+number of operators:
+
+The @subpage module-dom-examples section provides a collection of examples.
+
+**Example:**
+```cpp
+namespace ftxui {
+    ...
+
+// Define the document
+Element document = vbox({
+  text("The window") | bold | color(Color::Blue),
+  gauge(0.5)
+  text("The footer")
+});
+
+// Add a border, by calling the `ftxui::border` decorator function.
+document = border(document);
+
+// Add another border, using the pipe operator.
+document = document | border.
+
+// Add another border, using the |= operator.
+document |= border
+
+...
+}
+```
+
+**List of elements**
+
+The list of all elements are included and can be accessed by including the
+corresponding header file:
+```cpp
+#include <ftxui/dom/elements.hpp>
+```
+
+\include{strip} "ftxui/dom/elements.hpp"
+
+## text ## {#dom-text}
+
+The most simple widget. It displays a text.
+```cpp
+text("I am a piece of text");
+```
+```bash
+I am a piece of text.
+```
+
+## vtext {#dom-vtext}
+
+Identical to `ftxui::text`, but displayed vertically.
+
+Code:
+```cpp
+vtext("HELLO");
+```
+
+Terminal output:
+```bash
+H
+E
+L
+L
+O
+```
+
+## paragraph {#dom-paragraph}
+
+Similar to `ftxui::text`, but the individual word are wrapped along multiple
+lines, depending on the width of its container.
+
+Sample Code:
+```cpp
+paragraph("A very long text")
+```
+
+![ezgif com-gif-maker (4)](https://user-images.githubusercontent.com/4759106/147251370-983a06e7-6f41-4113-92b8-942f43d34d06.gif)
+
+For a more detailed example refer to [detailed example](https://arthursonzogni.github.io/FTXUI/examples_2dom_2paragraph_8cpp-example.html). Paragraph also includes a number of other variants as shown below:
+```cpp
+namespace ftxui {
+    Element paragraph(std::string text);
+    Element paragraphAlignLeft(std::string text);
+    Element paragraphAlignRight(std::string text);
+    Element paragraphAlignCenter(std::string text);
+    Element paragraphAlignJustify(std::string text);
+}
+```
+
+
+## border {#dom-border}
+
+Adds a border around an element.
+
+Code:
+```cpp
+border(text("The element"))
+```
+
+Terminal output:
+```bash
+┌───────────┐
+│The element│
+└───────────┘
+```
+
+> [!note]
+> You can achieve the same behavior by using the pipe operator.
+> 
+> Code:
+> ```cpp
+> text("The element") | border
+> ```
+
+Border also comes in a variety of styles as shown below:
+```cpp
+namespace ftxui {
+    Element border(Element);
+    Element borderLight(Element);
+    Element borderHeavy(Element);
+    Element borderDouble(Element);
+    Element borderRounded(Element);
+    Element borderEmpty(Element);
+    Decorator borderStyled(BorderStyle);
+    Decorator borderWith(Pixel);
+}
+```
+
+
+## window ## {#dom-window}
+
+A `ftxui::window` is a `ftxui::border`, but with an additional header. To add a
+window around an element, wrap it and specify a string as the header.
+Code:
+```cpp
+window("The window", text("The element"))
+```
+
+Terminal output:
+```bash
+┌The window─┐
+│The element│
+└───────────┘
+```
+
+## separator {#dom-separator}
+
+Displays a vertical/horizontal line to visually split the content of a
+container in two.
+
+Code:
+```cpp
+border(
+  hbox({
+    text("Left"), 
+    separator(),
+    text("Right")
+  })
+)
+```
+
+Terminal output:
+```bash
+┌────┬─────┐
+│left│right│
+└────┴─────┘
+```
+
+
+Separators come in a variety of flavors as shown below:
+```cpp
+namespace ftxui {
+    Element separator(void);
+    Element separatorLight();
+    Element separatorHeavy();
+    Element separatorDouble();
+    Element separatorEmpty();
+    Element separatorStyled(BorderStyle);
+    Element separator(Pixel);
+    Element separatorCharacter(std::string);
+    Element separatorHSelector(float left,
+                               float right,
+                               Color background,
+                               Color foreground);
+    Element separatorVSelector(float up,
+                               float down,
+                               Color background,
+                               Color foreground);
+}
+```
+
+## gauge {#dom-gauge}
+
+This is a visual element that represents a ratio of progress.
+
+Code:
+```cpp
+border(gauge(0.5))
+```
+
+Teminal output:
+```bash
+┌────────────────────────────────────────────────────────────────────────────┐
+│██████████████████████████████████████                                      │
+└────────────────────────────────────────────────────────────────────────────┘
+```
+
+Gauges can be displayed in many orientations as shown below:
+```cpp
+namespace {
+    Element gauge(float ratio);
+    Element gaugeLeft(float ratio);
+    Element gaugeRight(float ratio);
+    Element gaugeUp(float ratio);
+    Element gaugeDown(float ratio);
+    Element gaugeDirection(float ratio, GaugeDirection);
+}
+```
+
+## graph {#dom-graph}
+
+@htmlonly
+<script id="asciicast-223726" src="https://asciinema.org/a/223726.js" async></script>
+@endhtmlonly
+
+See:
+```cpp
+Element graph(GraphFunction);
+```
+
+## Colors {#dom-colors}
+
+Most terminal consoles can display colored text and colored backgrounds. FTXUI
+supports every color palette:
+```cpp
+Decorator color(Color);
+Decorator bgcolor(Color);
+```
+
+
+Color [gallery](https://arthursonzogni.github.io/FTXUI/examples_2dom_2color_gallery_8cpp-example.html):
+![image](https://user-images.githubusercontent.com/4759106/147248595-04c7245a-5b85-4544-809d-a5984fc6f9e7.png)
+
+### Palette16 #{#dom-colors-palette-16}
+
+On most terminals the following colors are supported:
+- Default
+
+- Black
+- GrayDark
+- GrayLight
+
+- White
+
+- Blue
+- BlueLight
+
+- Cyan
+- CyanLight
+
+- Green
+- GreenLight
+
+- Magenta
+- MagentaLight
+
+- Red
+- RedLight
+
+- Yellow
+- YellowLight
+
+Example use of the above colors using the pipe operator:
+```cpp
+text("Blue foreground") | color(Color::Blue);
+text("Blue background") | bgcolor(Color::Blue);
+text("Black on white") | color(Color::Black) | bgcolor(Color::White);
+```
+
+### Palette256 #{#dom-colors-palette-256}
+
+On terminal supporting 256 colors. 
+@htmlonly
+<script id="asciicast-OAUc3n6QrkmrLt7XEEb8AzbLt" src="https://asciinema.org/a/OAUc3n6QrkmrLt7XEEb8AzbLt.js" async></script>
+@endhtmlonly
+
+```cpp
+text("HotPink") | color(Color::HotPink);
+```
+
+### TrueColor #{#dom-colors-true-color}
+
+On terminal supporting trueColor, you can directly use the 24bit RGB color
+space:
+
+Use the constructors below to specify the **RGB** or **HSV** values for your
+color:
+
+There are two constructors:
+```cpp
+ftxui::Color::RGB(uint8_t red, uint8_t green, uint8_t blue);
+ftxui::Color::HSV(uint8_t hue, uint8_t saturation, uint8_t value);
+```
+
+@htmlonly
+<script id="asciicast-dk5r8IcCH0aFIIgWG0keSEHMG" src="https://asciinema.org/a/dk5r8IcCH0aFIIgWG0keSEHMG.js" async></script>
+<script id="asciicast-xwzzghmqcqzIuyLwCpQFEqbEu" src="https://asciinema.org/a/xwzzghmqcqzIuyLwCpQFEqbEu.js" async></script>
+@endhtmlonly
+
+## LinearGradient #{#dom-linear-gradient}
+
+FTXUI supports linear gradient. Either on the foreground or the background.
+
+```cpp
+Decorator color(const LinearGradient&);
+Decorator bgcolor(const LinearGradient&);
+```
+
+A `ftxui::LinearGradient` is defined by an angle in degree, and a list of color
+stops.
+```cpp
+auto gradient = LinearGradient()
+  .Angle(45)
+  .AddStop(0.0, Color::Red)
+  .AddStop(0.5, Color::Green)
+  .AddStop(1.0, Color::Blue);
+```
+
+You can also use simplified constructors:
+```cpp
+LinearGradient(Color::Red, Color::Blue);
+```
+```cpp
+LinearGradient(45, Color::Red, Color::Blue);
+```
+
+See [demo](https://arthursonzogni.github.io/FTXUI/examples/?file=component/linear_gradient_gallery).
+
+
+## Style {#dom-style}
+In addition to colored text and colored backgrounds. Many terminals support text
+effects such as: `bold`, `italic`, `dim`, `underlined`, `inverted`, `blink`.
+
+```cpp
+Element bold(Element);
+Element italic(Element);
+Element dim(Element);
+Element inverted(Element);
+Element underlined(Element);
+Element underlinedDouble(Element);
+Element strikethrough(Element);
+Element blink(Element);
+Decorator color(Color);
+Decorator bgcolor(Color);
+Decorator colorgrad(LinearGradient);
+Decorator bgcolorgrad(LinearGradient);
+```
+
+[Example](https://arthursonzogni.github.io/FTXUI/examples_2dom_2style_gallery_8cpp-example.html)
+
+![image](https://user-images.githubusercontent.com/4759106/147244118-380bf834-9e33-40df-9ff0-07c10f2598ef.png)
+
+To use these effects, simply wrap your elements with your desired effect:
+```cpp
+underlined(bold(text("This text is bold and underlined")))
+```
+
+Alternatively, use the pipe operator to chain it on your element:
+```cpp
+text("This text is bold") | bold | underlined
+```
+
+## Layout {#dom-layout}
+
+Enables elements to be arranged in the following ways:
+  - **Horizontally** with `ftxui::hbox`
+  - **Vertically** with `ftxui::vbox`
+  - **Inside a grid** with `ftxui::gridbox`
+  - **Wrapped along one direction** using the `ftxui::flexbox`.
+  
+[Example](https://arthursonzogni.github.io/FTXUI/examples_2dom_2vbox_hbox_8cpp-example.html) using `ftxui::hbox`, `ftxui::vbox` and `ftxui::filler`.
+
+![image](https://user-images.githubusercontent.com/4759106/147242524-7103b5d9-1a92-4e2d-ac70-b3d6740061e3.png)
+  
+  
+[Example](https://arthursonzogni.github.io/FTXUI/examples_2dom_2gridbox_8cpp-example.htmlp)
+using `ftxui::gridbox`:
+
+![image](https://user-images.githubusercontent.com/4759106/147242972-0db1f2e9-0790-496f-86e6-ed2c604f7a73.png)
+
+[Example](https://github.com/ArthurSonzogni/FTXUI/blob/master/examples/dom/hflow.cpp)
+using flexbox:
+
+![image](https://user-images.githubusercontent.com/4759106/147243064-780ac7cc-605b-475f-94b8-cf7c4aed03a5.png)
+
+Checkout this
+[example](https://arthursonzogni.github.io/FTXUI/examples_2dom_2hflow_8cpp-example.html)
+and the associated
+[demo](https://arthursonzogni.github.io/FTXUI/examples/?file=component/flexbox).
+
+Element can also become flexible using the the `ftxui::flex` decorator.
+
+Code:
+```cpp
+  hbox({
+    text("left") | border ,
+    text("middle") | border | flex,
+    text("right") | border,
+  });
+```
+Terminal output:
+```bash
+┌────┐┌─────────────────────────────────────────────────────┐┌─────┐
+│left││middle                                               ││right│
+└────┘└─────────────────────────────────────────────────────┘└─────┘
+```
+
+Code:
+```cpp
+  hbox({
+    text("left") | border ,
+    text("middle") | border | flex,
+    text("right") | border | flex,
+  });
+```
+
+Terminal output:
+```bash
+┌────┐┌───────────────────────────────┐┌───────────────────────────────┐
+│left││middle                         ││right                          │
+└────┘└───────────────────────────────┘└───────────────────────────────┘
+```
+
+## Table {#dom-table}
+
+Enables easy formatting of data into a neat table like visual form.
+
+[Code example](https://arthursonzogni.github.io/FTXUI/examples_2dom_2table_8cpp-example.html):
+  
+![image](https://user-images.githubusercontent.com/4759106/147250766-77d8ec9e-cf2b-486d-9866-1fd9f1bd2e6b.png)
+
+## Canvas {#dom-canvas}
+
+See the API [<ftxui/dom/canvas.hpp>](./canvas_8hpp_source.html)
+
+```cpp
+  auto c = Canvas(100, 100);
+  c.DrawPointLine(10, 10, 80, 10, Color::Red);
+  auto element = canvas(c);
+```
+
+Drawing can be performed on a `ftxui::Canvas`, using braille, block, or simple
+characters:
+  
+Simple [example](https://github.com/ArthurSonzogni/FTXUI/blob/master/examples/dom/canvas.cpp):
+  
+![image](https://user-images.githubusercontent.com/4759106/147245843-76cc62fb-ccb4-421b-aacf-939f9afb42fe.png)
+
+Complex [example](https://github.com/ArthurSonzogni/FTXUI/blob/master/examples/component/canvas_animated.cpp):
+  
+![ezgif com-gif-maker (3)](https://user-images.githubusercontent.com/4759106/147250538-783a8246-98e0-4a25-b032-3bd3710549d1.gif)

doc/module-screen.md

@@ -0,0 +1,200 @@
+@page module-screen Module screen
+@tableofcontents
+
+The `ftxui::screen` module is the low-level foundation. It can be used
+standalone, but it is primarily designed to be used together by
+[ftxui::dom](module-dom.html) and [ftxui::component](module-component.html)
+modules.
+
+It provides a @ref ftxui::Screen.
+
+---
+
+# ftxui::Screen
+
+The @ref ftxui::Screen class represents a 2D grid of styled characters that can
+be rendered to a terminal.  
+It provides methods to create a screen, access pixels, and render elements.
+
+You can access the individual cells (@ref ftxui::Pixel) of the screen using 
+the @ref ftxui::Screen::PixelAt method, which returns a reference
+to the pixel at the specified coordinates.
+
+**Example**
+```cpp
+#include <ftxui/screen/screen.hpp>
+#include <ftxui/screen/color.hpp>
+
+void main() {
+    auto screen = ftxui::Screen::Create(
+        ftxui::Dimension::Full(),   // Use full terminal width
+        ftxui::Dimension::Fixed(10) // Fixed height of 10 rows
+    );
+
+    // Access a specific pixel at (10, 5)
+    auto& pixel = screen.PixelAt(10, 5);
+
+    // Set properties of the pixel.
+    pixel.character = U'X';
+    pixel.foreground_color = ftxui::Color::Red;
+    pixel.background_color = ftxui::Color::RGB(0, 255, 0);
+    pixel.bold = true; // Set bold style
+    screen.Print(); // Print the screen to the terminal
+}
+```
+
+> [!note]
+> If the coordinates are out of bounds, a dummy pixel is returned.
+
+The screen can be printed to the terminal using @ref ftxui::Screen::Print() or
+converted to a std::string with @ref ftxui::Screen::ToString().
+
+<div class="tabbed">
+ 
+- <b class="tab-title">Print()</b>
+  ```cpp
+  auto screen = ...;
+  screen.Print();
+  ```
+- <b class="tab-title">ToString()</b>
+  ```cpp
+  auto screen = ...;
+  std::cout << screen.ToString();
+  ```
+ 
+</div>
+
+Note that you can reset the cursor position to the top-left corner of the
+screen after printing by calling @ref ftxui::Screen::ResetCursorPosition().
+
+**Example**
+```cpp
+auto screen = ...;
+while(true) {
+  // Drawing operations:
+  ...
+  
+  // Print the screen to the terminal. Then reset the cursor position and the
+  // screen content.
+  std::cout << screen.ToString();
+  std::cout << screen.ResetCursorPosition(/*clear=*/true);
+  std::cout << std::flush;
+
+  // Sleep for a short duration to control the refresh rate.
+  std::this_thread::sleep_for(std::chrono::milliseconds(100));
+}
+```
+
+---
+
+# ftxui::Dimension
+
+The @ref ftxui::Dimension utility controls screen sizing:
+
+* `Dimension::Full()` — use full terminal width or height
+* `Dimension::Fit(element)` — size to fit the rendered @ref ftxui::Element
+* `Dimension::Fixed(n)` — use exactly `n` columns or rows
+
+These values are to be passed to `ftxui::Screen::Create()`.
+
+@ref ftxui::Screen::Create() provides two overloads:
+
+- `Screen::Create(Dimension)` sets both width and height to the same kind of dimension
+- `Screen::Create(Dimension width, Dimension height)` allows distinct control per axis
+
+```cpp
+auto screen = ftxui::Screen::Create(
+  ftxui::Dimension::Full(),      // width
+  ftxui::Dimension::Fixed(10)    // height
+);
+```
+
+Once created, render an element and display the result:
+
+```cpp
+ftxui::Render(screen, element);
+screen.Print();
+```
+
+---
+
+# ftxui::Pixel
+
+Each cell in the screen grid is a @ref ftxui::Pixel, which holds:
+
+- Unicode codepoint.
+    - `character`
+- @ref ftxui::Color:
+    - `foreground_color`
+    - `background_color`
+- Booleans:
+    - `blink`
+    - `bold`
+    - `dim`
+    - `italic`
+    - `inverted` (swap foreground and background colors)
+    - `underlined`
+    - `underlined_double`
+    - `strikethrough`
+
+
+```cpp
+auto screen = ftxui::Screen::Create(
+  ftxui::Dimension::Fixed(5),
+  ftxui::Dimension::Fixed(5),
+);
+
+auto& pixel = screen.PixelAt(3, 3);
+pixel.character = U'X';
+pixel.bold = true;
+pixel.foreground_color = ftxui::Color::Red;
+pixel.background_color = ftxui::Color::RGB(0, 255, 0);
+
+screen.Print();
+```
+
+> [!note]
+> `PixelAt(x, y)` performs bounds checking and returns a reference to the pixel
+> at the specified coordinate. If out-of-bounds, a dummy pixel reference is
+> returned.
+
+
+Each cell in the screen is a @ref ftxui::Pixel. You can modify them using:
+
+```cpp
+auto& pixel = screen.PixelAt(x, y);
+pixel.character = U'X';
+pixel.bold = true;
+pixel.foreground_color = Color::Red;
+```
+
+---
+
+# ftxui::Color
+
+The @ref ftxui::Color class is used to define foreground and background colors for each @ref ftxui::Pixel.
+
+It supports various color spaces and predefined palettes. FTXUI will
+dynamically fallback to the closest available color in the terminal if the
+requested color is not supported by the terminal.
+
+**Color Spaces**
+
+- **Default**: `ftxui::Color::Default` (terminal's default color)
+- **16-color palette** [Demo](https://arthursonzogni.github.io/FTXUI/examples/?file=dom/color_gallery):
+    - `ftxui::Color::Black`,
+    - `ftxui::Color::Red`,
+    - ...
+- **256-color palette** [Demo](https://arthursonzogni.github.io/FTXUI/examples/?file=dom/color_palette256):
+    - `ftxui::Color::Chartreuse1`,
+    - `ftxui::Color::DarkViolet`,
+    - ...
+- **True color** (24bit) [Demo](https://arthursonzogni.github.io/FTXUI/examples/?file=dom/color_truecolor_HSV:
+    - `ftxui::Color::RGB(uint8_t red, uint8_t green, uint8_t blue)`
+    - `ftxui::Color::HSV(uint8_t h, uint8_t s, uint8_t v)`.
+    
+
+> [!note]
+> You can query the terminal capability using @ref ftxui::Terminal::ColorSupport();
+>
+> This can manually be set using @ref ftxui::Terminal::SetColorSupport().

doc/module.md

@@ -0,0 +1,49 @@
+# Modules {#modules}
+
+![title-img](https://nsm09.casimages.com/img/2025/05/30//2505300816063242518595251.jpg)
+
+FTXUI is organized into three modules, each building upon the previous:
+
+1. @subpage module-screen — low-level rendering
+2. @subpage module-dom — layout and composition
+3. @subpage module-component — user interaction
+
+---
+
+[ @subpage module-screen ]
+
+Defines:
+
+- **`ftxui::Screen`**: a 2D grid of styled characters.
+- **`ftxui::Pixel`**: the unit of rendering.
+- Helpers like `ftxui::Color` and `Dimension`.
+
+Use for direct terminal drawing and styling.
+
+---
+
+[ @subpage module-dom ]
+
+Provides:
+
+- **`ftxui::Element`**: a tree structure for layout and UI.
+- Composable and responsive elements.
+- `Render()` to draw onto a `Screen`.
+
+Ideal for structured, styled UIs.
+
+---
+
+[ @subpage module-component ]
+
+Adds:
+
+- **`ftxui::Component`**: stateful, interactive widgets.
+- Built-ins: `Checkbox`, `Input`, `Menu`, `Button`.
+- Supports keyboard/cursor input and composition.
+
+Use for interactive apps.
+
+---
+
+Modules can be used independently, or together: `screen → dom → component`.

doc/stylesheet.css

@@ -0,0 +1,118 @@
+html {
+  --primary-color: #9ed072;         /* green (identifier, strings) */
+  --primary-dark-color: #f39660;    /* orange (functions, tags) */
+  --primary-light-color: #7fbbb3;   /* teal (types, decorators) */
+
+  --page-background-color: #2c2e34; /* main background */
+  --page-foreground-color: #e2e2e3; /* main text */
+  --page-secondary-foreground-color: #9aa5ce; /* dim text */
+  --separator-color: #3b3e48;
+  --side-nav-background: #1a1b26;
+
+  --code-background: #2a2e38;
+  --code-foreground: #e2e2e3;
+
+  --tablehead-background: #1f1f28;
+
+  --blockquote-background: #3a3e44;
+  --blockquote-foreground: #d4bfff;
+
+  --warning-color: #e0af68;
+  --warning-color-dark: #ff9e64;
+  --warning-color-darker: #f7768e;
+  --bug-color: #f7768e;
+
+  --fragment-background: #2c2e34;
+  --fragment-foreground: #e2e2e3;
+  --fragment-keyword: #f7768e;       /* pink */
+  --fragment-keywordtype: #7fbbb3;   /* teal */
+  --fragment-keywordflow: #e0af68;   /* orange-yellow */
+  --fragment-token: #9ed072;         /* green */
+  --fragment-comment: #5c6370;
+  --fragment-link: #7aa2f7;          /* blue link */
+  --fragment-preprocessor: #f39660;  /* orange */
+  --fragment-linenumber-color: #414868;
+  --fragment-linenumber-background: #2c2e34;
+  --fragment-linenumber-border: #1a1b26;
+}
+
+/* Base style for all sections */
+.section.note,
+.section.warning,
+.section.remark,
+.section.attention,
+.section.important {
+  border-left: 4px solid var(--primary-dark-color);
+  border-radius: 6px;
+  padding: 0.9em 1.2em;
+  margin: 1.5em 0;
+  background-color: #2e303e;
+  color: var(--page-foreground-color);
+  font-size: 0.95em;
+}
+
+/* Section title */
+.section.note dt,
+.section.warning dt,
+.section.remark dt,
+.section.attention dt,
+.section.important dt {
+  font-weight: bold;
+  display: block;
+  margin-bottom: 0.35em;
+}
+
+/* Section body */
+.section.note dd,
+.section.warning dd,
+.section.remark dd,
+.section.attention dd,
+.section.important dd {
+  margin: 0;
+}
+
+/* Note - soft cyan */
+.section.note {
+  border-left-color: #7fbbb3;
+  background-color: #263640;
+}
+.section.note dt {
+  color: #7fbbb3;
+}
+
+/* Warning - amber */
+.section.warning {
+  border-left-color: #e0af68;
+  background-color: #3d2f1f;
+}
+.section.warning dt {
+  color: #e0af68;
+}
+
+/* Tip (Remark) - green */
+.section.remark {
+  border-left-color: #9ed072;
+  background-color: #2d3a2d;
+}
+.section.remark dt {
+  color: #9ed072;
+}
+
+/* Caution (Attention) - bold red-orange */
+.section.attention {
+  border-left-color: #f7768e;
+  background-color: #3d2a2e;
+}
+.section.attention dt {
+  color: #f7768e;
+}
+
+/* Important - purple */
+.section.important {
+  border-left-color: #ab9df2;
+  background-color: #2f2a3a;
+}
+.section.important dt {
+  color: #ab9df2;
+}
+

examples/component/CMakeLists.txt

@@ -18,6 +18,7 @@ example(focus_cursor)
 example(gallery)
 example(homescreen)
 example(input)
+example(input_in_frame)
 example(input_style)
 example(linear_gradient_gallery)
 example(maybe)
@@ -39,6 +40,7 @@ example(radiobox_in_frame)
 example(renderer)
 example(resizable_split)
 example(scrollbar)
+example(selection)
 example(slider)
 example(slider_direction)
 example(slider_rgb)

examples/component/button.cpp

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

examples/component/checkbox.cpp

@@ -1,30 +1,38 @@
 // 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 <memory>  // for allocator, __shared_ptr_access
-#include <string>  // for string, basic_string, operator+, to_string
-#include <vector>  // for vector
+#include <array>  // for array
+#include <iostream>
+#include <memory>  // for shared_ptr, __shared_ptr_access
+#include <string>  // for operator+, to_string
 
 #include "ftxui/component/captured_mouse.hpp"  // for ftxui
-#include "ftxui/component/component.hpp"       // for Input, Renderer, Vertical
-#include "ftxui/component/component_base.hpp"  // for ComponentBase
-#include "ftxui/component/screen_interactive.hpp"  // for Component, ScreenInteractive
+#include "ftxui/component/component.hpp"  // for Checkbox, Renderer, Vertical
+#include "ftxui/component/component_base.hpp"      // for ComponentBase
+#include "ftxui/component/screen_interactive.hpp"  // for ScreenInteractive
 #include "ftxui/dom/elements.hpp"  // for operator|, Element, size, border, frame, vscroll_indicator, HEIGHT, LESS_THAN
 
+using namespace ftxui;
+
 int main() {
-  using namespace ftxui;
+  bool download = false;
+  bool upload = false;
+  bool ping = false;
 
-  Component input_list = Container::Vertical({});
-  std::vector<std::string> items(100, "");
-  for (size_t i = 0; i < items.size(); ++i) {
-    input_list->Add(Input(&(items[i]), "placeholder " + std::to_string(i)));
-  }
-
-  auto renderer = Renderer(input_list, [&] {
-    return input_list->Render() | vscroll_indicator | frame | border |
-           size(HEIGHT, LESS_THAN, 10);
+  auto container = Container::Vertical({
+      Checkbox("Download", &download),
+      Checkbox("Upload", &upload),
+      Checkbox("Ping", &ping),
   });
 
-  auto screen = ScreenInteractive::TerminalOutput();
-  screen.Loop(renderer);
+  auto screen = ScreenInteractive::FitComponent();
+  screen.Loop(container);
+
+  std::cout << "---" << std::endl;
+  std::cout << "Download: " << download << std::endl;
+  std::cout << "Upload: " << upload << std::endl;
+  std::cout << "Ping: " << ping << std::endl;
+  std::cout << "---" << std::endl;
+
+  return 0;
 }

examples/component/gallery.cpp

@@ -97,7 +97,25 @@ int main() {
   });
   sliders = Wrap("Slider", sliders);
 
-  // -- Layout -----------------------------------------------------------------
+  // A large text:
+  auto lorel_ipsum = Renderer([] {
+    return vbox({
+        text("Lorem ipsum dolor sit amet, consectetur adipiscing elit. "),
+        text("Sed do eiusmod tempor incididunt ut labore et dolore magna "
+             "aliqua. "),
+        text("Ut enim ad minim veniam, quis nostrud exercitation ullamco "
+             "laboris nisi ut aliquip ex ea commodo consequat. "),
+        text("Duis aute irure dolor in reprehenderit in voluptate velit esse "
+             "cillum dolore eu fugiat nulla pariatur. "),
+        text("Excepteur sint occaecat cupidatat non proident, sunt in culpa "
+             "qui officia deserunt mollit anim id est laborum. "),
+
+    });
+  });
+  lorel_ipsum = Wrap("Lorel Ipsum", lorel_ipsum);
+
+  // -- Layout
+  // -----------------------------------------------------------------
   auto layout = Container::Vertical({
       menu,
       toggle,
@@ -106,6 +124,7 @@ int main() {
       input,
       sliders,
       button,
+      lorel_ipsum,
   });
 
   auto component = Renderer(layout, [&] {
@@ -123,6 +142,8 @@ int main() {
                sliders->Render(),
                separator(),
                button->Render(),
+               separator(),
+               lorel_ipsum->Render(),
            }) |
            xflex | size(WIDTH, GREATER_THAN, 40) | border;
   });

examples/component/homescreen.cpp

@@ -424,7 +424,7 @@ int main() {
   auto paragraph_renderer_left = Renderer([&] {
     std::string str =
         "Lorem Ipsum is simply dummy text of the printing and typesetting "
-        "industry. Lorem Ipsum has been the industry's standard dummy text "
+        "industry.\nLorem Ipsum has been the industry's standard dummy text "
         "ever since the 1500s, when an unknown printer took a galley of type "
         "and scrambled it to make a type specimen book.";
     return vbox({

examples/component/input_in_frame.cpp

@@ -0,0 +1,30 @@
+// 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 <memory>  // for allocator, __shared_ptr_access
+#include <string>  // for string, basic_string, operator+, to_string
+#include <vector>  // for vector
+
+#include "ftxui/component/captured_mouse.hpp"  // for ftxui
+#include "ftxui/component/component.hpp"       // for Input, Renderer, Vertical
+#include "ftxui/component/component_base.hpp"  // for ComponentBase
+#include "ftxui/component/screen_interactive.hpp"  // for Component, ScreenInteractive
+#include "ftxui/dom/elements.hpp"  // for operator|, Element, size, border, frame, vscroll_indicator, HEIGHT, LESS_THAN
+
+int main() {
+  using namespace ftxui;
+
+  Component input_list = Container::Vertical({});
+  std::vector<std::string> items(100, "");
+  for (size_t i = 0; i < items.size(); ++i) {
+    input_list->Add(Input(&(items[i]), "placeholder " + std::to_string(i)));
+  }
+
+  auto renderer = Renderer(input_list, [&] {
+    return input_list->Render() | vscroll_indicator | frame | border |
+           size(HEIGHT, LESS_THAN, 10);
+  });
+
+  auto screen = ScreenInteractive::TerminalOutput();
+  screen.Loop(renderer);
+}

examples/component/selection.cpp

@@ -0,0 +1,87 @@
+// 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 <string>  // for char_traits, operator+, string, basic_string
+
+#include "ftxui/component/component.hpp"       // for Input, Renderer, Vertical
+#include "ftxui/component/component_base.hpp"  // for ComponentBase
+#include "ftxui/component/component_options.hpp"  // for InputOption
+#include "ftxui/component/screen_interactive.hpp"  // for Component, ScreenInteractive
+#include "ftxui/dom/elements.hpp"  // for text, hbox, separator, Element, operator|, vbox, border
+#include "ftxui/util/ref.hpp"  // for Ref
+
+using namespace ftxui;
+
+Element LoremIpsum() {
+  return vbox({
+      text("FTXUI: A powerful library for building user interfaces."),
+      text("Enjoy a rich set of components and a declarative style."),
+      text("Create beautiful and responsive UIs with minimal effort."),
+      text("Join the community and experience the power of FTXUI."),
+  });
+}
+
+int main() {
+  auto screen = ScreenInteractive::TerminalOutput();
+
+  auto quit =
+      Button("Quit", screen.ExitLoopClosure(), ButtonOption::Animated());
+
+  int selection_change_counter = 0;
+  std::string selection_content = "";
+  screen.SelectionChange([&] {
+    selection_change_counter++;
+    selection_content = screen.GetSelection();
+  });
+
+  // The components:
+  auto renderer = Renderer(quit, [&] {
+    return vbox({
+        text("Select changed: " + std::to_string(selection_change_counter) +
+             " times"),
+        text("Currently selected: "),
+        paragraph(selection_content) | vscroll_indicator | frame | border |
+            size(HEIGHT, EQUAL, 10),
+        window(text("Horizontal split"), hbox({
+                                             LoremIpsum(),
+                                             separator(),
+                                             LoremIpsum(),
+                                             separator(),
+                                             LoremIpsum(),
+                                         })),
+        window(text("Vertical split"), vbox({
+                                           LoremIpsum(),
+                                           separator(),
+                                           LoremIpsum(),
+                                           separator(),
+                                           LoremIpsum(),
+                                       })),
+        window(text("Grid split with different style"),
+               vbox({
+                   hbox({
+                       LoremIpsum(),
+                       separator(),
+                       LoremIpsum()                                   //
+                           | selectionBackgroundColor(Color::Yellow)  //
+                           | selectionColor(Color::Black)             //
+                           | selectionStyleReset,
+                       separator(),
+                       LoremIpsum() | selectionColor(Color::Blue),
+                   }),
+                   separator(),
+                   hbox({
+                       LoremIpsum() | selectionColor(Color::Red),
+                       separator(),
+                       LoremIpsum() | selectionStyle([](Pixel& pixel) {
+                         pixel.underlined_double = true;
+                       }),
+                       separator(),
+                       LoremIpsum(),
+                   }),
+               })),
+        quit->Render(),
+    });
+  });
+
+  screen.Loop(renderer);
+}

examples/component/slider_direction.cpp

@@ -19,7 +19,7 @@ using namespace ftxui;
 int main() {
   auto screen = ScreenInteractive::TerminalOutput();
   std::array<int, 30> values;
-  for (int i = 0; i < values.size(); ++i) {
+  for (size_t i = 0; i < values.size(); ++i) {
     values[i] = 50 + 20 * std::sin(i * 0.3);
   }
 

examples/dom/CMakeLists.txt

@@ -29,6 +29,7 @@ example(style_dim)
 example(style_gallery)
 example(style_hyperlink)
 example(style_inverted)
+example(style_italic)
 example(style_strikethrough)
 example(style_underlined)
 example(style_underlined_double)

examples/dom/color_truecolor_RGB.cpp

@@ -12,7 +12,6 @@
 int main() {
   using namespace ftxui;
 
-  int saturation = 255;
   Elements red_line;
   Elements green_line;
   Elements blue_line;

examples/dom/graph.cpp

@@ -10,6 +10,7 @@
 #include <memory>                   // for shared_ptr
 #include <string>                   // for operator<<, string
 #include <thread>                   // for sleep_for
+#include <utility>                  // for ignore
 #include <vector>                   // for vector
 
 #include "ftxui/dom/node.hpp"  // for Render
@@ -49,6 +50,7 @@ int main() {
 
   std::string reset_position;
   for (int i = 0;; ++i) {
+    std::ignore = i;
     auto document = hbox({
         vbox({
             graph(std::ref(my_graph)),

examples/dom/style_gallery.cpp

@@ -15,6 +15,7 @@ int main() {
     hbox({
       text("normal")                                    , text(" ") ,
       text("bold")               | bold                 , text(" ") ,
+      text("italic")             | italic               , text(" ") ,
       text("dim")                | dim                  , text(" ") ,
       text("inverted")           | inverted             , text(" ") ,
       text("underlined")         | underlined           , text(" ") ,

examples/dom/style_italic.cpp

@@ -0,0 +1,23 @@
+// Copyright 2025 Arthur Sonzogni. All rights reserved.
+// Use of this source code is governed by the MIT license that can be found in
+// the LICENSE file.
+#include <ftxui/dom/elements.hpp>  // for text, operator|, inverted, Fit, hbox, Element
+#include <ftxui/screen/screen.hpp>  // for Full, Screen
+#include <memory>                   // for allocator
+
+#include "ftxui/dom/node.hpp"      // for Render
+#include "ftxui/screen/color.hpp"  // for ftxui
+
+int main() {
+  using namespace ftxui;
+  auto document = hbox({
+      text("This text is "),
+      text("italic") | italic,
+      text(". Do you like it?"),
+  });
+  auto screen = Screen::Create(Dimension::Full(), Dimension::Fit(document));
+  Render(screen, document);
+  screen.Print();
+
+  return 0;
+}

include/ftxui/component/component_base.hpp

@@ -50,7 +50,10 @@ class ComponentBase {
   void DetachAllChildren();
 
   // Renders the component.
-  virtual Element Render();
+  Element Render();
+
+  // Override this function modify how `Render` works.
+  virtual Element OnRender();
 
   // Handles an event.
   // By default, reduce on children with a lazy OR.
@@ -94,6 +97,7 @@ class ComponentBase {
 
  private:
   ComponentBase* parent_ = nullptr;
+  bool in_render = false;
 };
 
 }  // namespace ftxui

include/ftxui/component/component_options.hpp

@@ -17,9 +17,8 @@
 
 namespace ftxui {
 
-/// @brief arguments for |ButtonOption::transform|, |CheckboxOption::transform|,
-/// |Radiobox::transform|, |MenuEntryOption::transform|,
-/// |MenuOption::transform|.
+/// @brief arguments for transform from |ButtonOption|, |CheckboxOption|,
+/// |RadioboxOption|, |MenuEntryOption|, |MenuOption|.
 struct EntryState {
   std::string label;  ///< The label to display.
   bool state;         ///< The state of the button/checkbox/radiobox

include/ftxui/component/screen_interactive.hpp

@@ -16,6 +16,7 @@
 #include "ftxui/component/captured_mouse.hpp"  // for CapturedMouse
 #include "ftxui/component/event.hpp"           // for Event
 #include "ftxui/component/task.hpp"            // for Task, Closure
+#include "ftxui/dom/selection.hpp"             // for SelectionOption
 #include "ftxui/screen/screen.hpp"             // for Screen
 
 namespace ftxui {
@@ -68,6 +69,10 @@ class ScreenInteractive : public Screen {
   void ForceHandleCtrlC(bool force);
   void ForceHandleCtrlZ(bool force);
 
+  // Selection API.
+  std::string GetSelection();
+  void SelectionChange(std::function<void()> callback);
+
  private:
   void ExitNow();
 
@@ -82,6 +87,8 @@ class ScreenInteractive : public Screen {
   void RunOnceBlocking(Component component);
 
   void HandleTask(Component component, Task& task);
+  bool HandleSelection(bool handled, Event event);
+  void RefreshSelection();
   void Draw(Component component);
   void ResetCursorPosition();
 
@@ -129,6 +136,22 @@ class ScreenInteractive : public Screen {
   // The style of the cursor to restore on exit.
   int cursor_reset_shape_ = 1;
 
+  // Selection API:
+  CapturedMouse selection_pending_;
+  struct SelectionData {
+    int start_x = -1;
+    int start_y = -1;
+    int end_x = -2;
+    int end_y = -2;
+    bool empty = true;
+    bool operator==(const SelectionData& other) const;
+    bool operator!=(const SelectionData& other) const;
+  };
+  SelectionData selection_data_;
+  SelectionData selection_data_previous_;
+  std::unique_ptr<Selection> selection_;
+  std::function<void()> selection_on_change_;
+
   friend class Loop;
 
  public:

include/ftxui/dom/elements.hpp

@@ -95,6 +95,7 @@ Element canvas(std::function<void(Canvas&)>);
 // -- Decorator ---
 Element bold(Element);
 Element dim(Element);
+Element italic(Element);
 Element inverted(Element);
 Element underlined(Element);
 Element underlinedDouble(Element);
@@ -113,6 +114,11 @@ Decorator focusPositionRelative(float x, float y);
 Element automerge(Element child);
 Decorator hyperlink(std::string link);
 Element hyperlink(std::string link, Element child);
+Element selectionStyleReset(Element);
+Decorator selectionColor(Color foreground);
+Decorator selectionBackgroundColor(Color foreground);
+Decorator selectionForegroundColor(Color foreground);
+Decorator selectionStyle(std::function<void(Pixel&)> style);
 
 // --- Layout is
 // Horizontal, Vertical or stacked set of elements.
@@ -156,7 +162,7 @@ Element frame(Element);
 Element xframe(Element);
 Element yframe(Element);
 Element focus(Element);
-Element select(Element);
+Element select(Element e);  // Deprecated - Alias for focus.
 
 // --- Cursor ---
 // Those are similar to `focus`, but also change the shape of the cursor.

include/ftxui/dom/node.hpp

@@ -8,6 +8,7 @@
 #include <vector>  // for vector
 
 #include "ftxui/dom/requirement.hpp"  // for Requirement
+#include "ftxui/dom/selection.hpp"    // for Selection
 #include "ftxui/screen/box.hpp"       // for Box
 #include "ftxui/screen/screen.hpp"
 
@@ -40,9 +41,15 @@ class Node {
   //         Propagated from Parents to Children.
   virtual void SetBox(Box box);
 
-  // Step 3: Draw this element.
+  // Step 3: (optional) Selection
+  //         Propagated from Parents to Children.
+  virtual void Select(Selection& selection);
+
+  // Step 4: Draw this element.
   virtual void Render(Screen& screen);
 
+  virtual std::string GetSelectedContent(Selection& selection);
+
   // Layout may not resolve within a single iteration for some elements. This
   // allows them to request additionnal iterations. This signal must be
   // forwarded to children at least once.
@@ -52,6 +59,8 @@ class Node {
   };
   virtual void Check(Status* status);
 
+  friend void Render(Screen& screen, Node* node, Selection& selection);
+
  protected:
   Elements children_;
   Requirement requirement_;
@@ -60,6 +69,10 @@ class Node {
 
 void Render(Screen& screen, const Element& element);
 void Render(Screen& screen, Node* node);
+void Render(Screen& screen, Node* node, Selection& selection);
+std::string GetNodeSelectedContent(Screen& screen,
+                                   Node* node,
+                                   Selection& selection);
 
 }  // namespace ftxui
 

include/ftxui/dom/requirement.hpp

@@ -5,8 +5,10 @@
 #define FTXUI_DOM_REQUIREMENT_HPP
 
 #include "ftxui/screen/box.hpp"
+#include "ftxui/screen/screen.hpp"
 
 namespace ftxui {
+class Node;
 
 struct Requirement {
   // The required size to fully draw the element.
@@ -20,13 +22,28 @@ struct Requirement {
   int flex_shrink_y = 0;
 
   // Focus management to support the frame/focus/select element.
-  enum Selection {
-    NORMAL = 0,
-    SELECTED = 1,
-    FOCUSED = 2,
+  struct Focused {
+    bool enabled = false;
+    Box box;
+    Node* node = nullptr;
+    Screen::Cursor::Shape cursor_shape = Screen::Cursor::Shape::Hidden;
+
+    // Internal for interactions with components.
+    bool component_active = false;
+
+    // Return whether this requirement should be preferred over the other.
+    bool Prefer(const Focused& other) const {
+      if (!other.enabled) {
+        return false;
+      }
+      if (!enabled) {
+        return true;
+      }
+
+      return other.component_active && !component_active;
+    }
   };
-  Selection selection = NORMAL;
-  Box selected_box;
+  Focused focused;
 };
 
 }  // namespace ftxui

include/ftxui/dom/selection.hpp

@@ -0,0 +1,50 @@
+// 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 FTXUI_DOM_SELECTION_HPP
+#define FTXUI_DOM_SELECTION_HPP
+
+#include <functional>
+
+#include <sstream>
+#include "ftxui/screen/box.hpp"    // for Box
+#include "ftxui/screen/pixel.hpp"  // for Pixel
+
+namespace ftxui {
+
+/// @brief Represent a selection in the terminal.
+class Selection {
+ public:
+  Selection();  // Empty selection.
+  Selection(int start_x, int start_y, int end_x, int end_y);
+
+  const Box& GetBox() const;
+
+  Selection SaturateHorizontal(Box box);
+  Selection SaturateVertical(Box box);
+  bool IsEmpty() const { return empty_; }
+
+  void AddPart(const std::string& part, int y, int left, int right);
+  std::string GetParts() { return parts_.str(); }
+
+ private:
+  Selection(int start_x, int start_y, int end_x, int end_y, Selection* parent);
+
+  const int start_x_ = 0;
+  const int start_y_ = 0;
+  const int end_x_ = 0;
+  const int end_y_ = 0;
+  const Box box_ = {};
+  Selection* const parent_ = this;
+  const bool empty_ = true;
+  std::stringstream parts_;
+
+  // The position of the last inserted part.
+  int x_ = 0;
+  int y_ = 0;
+};
+
+}  // namespace ftxui
+
+#endif /* end of include guard: FTXUI_DOM_SELECTION_HPP */

include/ftxui/screen/box.hpp

@@ -14,6 +14,7 @@ struct Box {
 
   static auto Intersection(Box a, Box b) -> Box;
   static auto Union(Box a, Box b) -> Box;
+  void Shift(int x, int y);
   bool Contain(int x, int y) const;
   bool IsEmpty() const;
   bool operator==(const Box& other) const;

include/ftxui/screen/pixel.hpp

@@ -17,6 +17,7 @@ struct Pixel {
       : blink(false),
         bold(false),
         dim(false),
+        italic(false),
         inverted(false),
         underlined(false),
         underlined_double(false),
@@ -27,6 +28,7 @@ struct Pixel {
   bool blink : 1;
   bool bold : 1;
   bool dim : 1;
+  bool italic : 1;
   bool inverted : 1;
   bool underlined : 1;
   bool underlined_double : 1;

include/ftxui/screen/screen.hpp

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

src/ftxui/component/button.cpp

@@ -37,7 +37,7 @@ class ButtonBase : public ComponentBase, public ButtonOption {
   explicit ButtonBase(ButtonOption option) : ButtonOption(std::move(option)) {}
 
   // Component implementation:
-  Element Render() override {
+  Element OnRender() override {
     const bool active = Active();
     const bool focused = Focused();
     const bool focused_or_hover = focused || mouse_hover_;
@@ -47,14 +47,16 @@ class ButtonBase : public ComponentBase, public ButtonOption {
       SetAnimationTarget(target);
     }
 
-    auto focus_management = focused ? focus : active ? select : nothing;
     const EntryState state{
         *label, false, active, focused_or_hover, Index(),
     };
 
     auto element = (transform ? transform : DefaultTransform)  //
         (state);
-    return element | AnimatedColorStyle() | focus_management | reflect(box_);
+    element |= AnimatedColorStyle();
+    element |= focus;
+    element |= reflect(box_);
+    return element;
   }
 
   Decorator AnimatedColorStyle() {

src/ftxui/component/checkbox.cpp

@@ -23,16 +23,17 @@ class CheckboxBase : public ComponentBase, public CheckboxOption {
 
  private:
   // Component implementation.
-  Element Render() override {
+  Element OnRender() override {
     const bool is_focused = Focused();
     const bool is_active = Active();
-    auto focus_management = is_focused ? focus : is_active ? select : nothing;
     auto entry_state = EntryState{
         *label, *checked, is_active, is_focused || hovered_, -1,
     };
     auto element = (transform ? transform : CheckboxOption::Simple().transform)(
         entry_state);
-    return element | focus_management | reflect(box_);
+    element |= focus;
+    element |= reflect(box_);
+    return element;
   }
 
   bool OnEvent(Event event) override {
@@ -69,7 +70,6 @@ class CheckboxBase : public ComponentBase, public CheckboxOption {
         event.mouse().motion == Mouse::Pressed) {
       *checked = !*checked;
       on_change();
-      TakeFocus();
       return true;
     }
 

src/ftxui/component/collapsible.cpp

@@ -28,7 +28,7 @@ namespace ftxui {
 ///
 /// ▼ Show details
 /// <details component>
-///  ```
+/// ```
 // NOLINTNEXTLINE
 Component Collapsible(ConstStringRef label, Component child, Ref<bool> show) {
   class Impl : public ComponentBase {

src/ftxui/component/component.cpp

@@ -15,6 +15,8 @@
 #include "ftxui/component/event.hpp"           // for Event
 #include "ftxui/component/screen_interactive.hpp"  // for Component, ScreenInteractive
 #include "ftxui/dom/elements.hpp"                  // for text, Element
+#include "ftxui/dom/node.hpp"                      // for Node, Elements
+#include "ftxui/screen/box.hpp"                    // for Box
 
 namespace ftxui::animation {
 class Params;
@@ -103,10 +105,46 @@ void ComponentBase::DetachAllChildren() {
 }
 
 /// @brief Draw the component.
-/// Build a ftxui::Element to be drawn on the ftxi::Screen representing this
-/// ftxui::ComponentBase.
+/// Build a ftxui::Element to be drawn on the ftxui::Screen representing this
+/// ftxui::ComponentBase. Please override OnRender() to modify the rendering.
 /// @ingroup component
 Element ComponentBase::Render() {
+  // Some users might call `ComponentBase::Render()` from
+  // `T::OnRender()`. To avoid infinite recursion, we use a flag.
+  if (in_render) {
+    return ComponentBase::OnRender();
+  }
+
+  in_render = true;
+  Element element = OnRender();
+  in_render = false;
+
+  class Wrapper : public Node {
+   public:
+    bool active_ = false;
+
+    Wrapper(Element child, bool active)
+        : Node({std::move(child)}), active_(active) {}
+
+    void SetBox(Box box) override {
+      Node::SetBox(box);
+      children_[0]->SetBox(box);
+    }
+
+    void ComputeRequirement() override {
+      Node::ComputeRequirement();
+      requirement_.focused.component_active = active_;
+    }
+  };
+
+  return std::make_shared<Wrapper>(std::move(element), Active());
+}
+
+/// @brief Draw the component.
+/// Build a ftxui::Element to be drawn on the ftxi::Screen representing this
+/// ftxui::ComponentBase. This function is means to be overridden.
+/// @ingroup component
+Element ComponentBase::OnRender() {
   if (children_.size() == 1) {
     return children_.front()->Render();
   }

src/ftxui/component/container.cpp

@@ -98,7 +98,7 @@ class VerticalContainer : public ContainerBase {
  public:
   using ContainerBase::ContainerBase;
 
-  Element Render() override {
+  Element OnRender() override {
     Elements elements;
     elements.reserve(children_.size());
     for (auto& it : children_) {
@@ -163,6 +163,7 @@ class VerticalContainer : public ContainerBase {
       return false;
     }
 
+    const int old_selected = *selector_;
     if (event.mouse().button == Mouse::WheelUp) {
       MoveSelector(-1);
     }
@@ -171,7 +172,7 @@ class VerticalContainer : public ContainerBase {
     }
     *selector_ = std::max(0, std::min(int(children_.size()) - 1, *selector_));
 
-    return true;
+    return old_selected != *selector_;
   }
 
   Box box_;
@@ -181,7 +182,7 @@ class HorizontalContainer : public ContainerBase {
  public:
   using ContainerBase::ContainerBase;
 
-  Element Render() override {
+  Element OnRender() override {
     Elements elements;
     elements.reserve(children_.size());
     for (auto& it : children_) {
@@ -217,7 +218,7 @@ class TabContainer : public ContainerBase {
  public:
   using ContainerBase::ContainerBase;
 
-  Element Render() override {
+  Element OnRender() override {
     const Component active_child = ActiveChild();
     if (active_child) {
       return active_child->Render();
@@ -243,7 +244,7 @@ class StackedContainer : public ContainerBase {
       : ContainerBase(std::move(children), nullptr) {}
 
  private:
-  Element Render() final {
+  Element OnRender() final {
     Elements elements;
     for (auto& child : children_) {
       elements.push_back(child->Render());
@@ -333,7 +334,7 @@ Component Vertical(Components children) {
 ///   children_2,
 ///   children_3,
 ///   children_4,
-/// });
+/// }, &selected_children);
 /// ```
 Component Vertical(Components children, int* selector) {
   return std::make_shared<VerticalContainer>(std::move(children), selector);
@@ -354,7 +355,7 @@ Component Vertical(Components children, int* selector) {
 ///   children_2,
 ///   children_3,
 ///   children_4,
-/// }, &selected_children);
+/// });
 /// ```
 Component Horizontal(Components children) {
   return Horizontal(std::move(children), nullptr);

src/ftxui/component/dropdown.cpp

@@ -44,10 +44,14 @@ Component Dropdown(DropdownOption option) {
       }));
     }
 
-    Element Render() override {
-      radiobox.selected =
+    Element OnRender() override {
+      selected_ =
           util::clamp(radiobox.selected(), 0, int(radiobox.entries.size()) - 1);
-      title_ = radiobox.entries[selected_()];
+      selected_ = util::clamp(selected_(), 0, int(radiobox.entries.size()) - 1);
+
+      if (selected_() >= 0 && selected_() < int(radiobox.entries.size())) {
+        title_ = radiobox.entries[selected_()];
+      }
 
       return transform(*open_, checkbox_->Render(), radiobox_->Render());
     }
@@ -66,10 +70,13 @@ Component Dropdown(DropdownOption option) {
       // Auto-close the dropdown when the user selects an item, even if the item
       // it the same as the previous one.
       if (open_old && open_()) {
-        const bool should_close = (selected_() != selected_old) ||     //
-                                  (event == Event::Return) ||          //
-                                  (event == Event::Character(' ')) ||  //
-                                  (event == Event::Escape);            //
+        const bool should_close =
+            (selected_() != selected_old) ||     //
+            (event == Event::Return) ||          //
+            (event == Event::Character(' ')) ||  //
+            (event == Event::Escape) ||          //
+            (event.is_mouse() && event.mouse().button == Mouse::Left &&
+             event.mouse().motion == Mouse::Pressed);
 
         if (should_close) {
           checkbox_->TakeFocus();

src/ftxui/component/dropdown_test.cpp

@@ -0,0 +1,34 @@
+// Copyright 2025 Arthur Sonzogni. All rights reserved.
+// Use of this source code is governed by the MIT license that can be found in
+// the LICENSE file.
+
+#include "ftxui/component/component.hpp"  // for Horizontal, Vertical, Button, Tab
+#include "ftxui/component/component_base.hpp"  // for ComponentBase, Component
+#include "ftxui/component/event.hpp"  // for Event, Event::Tab, Event::TabReverse, Event::ArrowDown, Event::ArrowLeft, Event::ArrowRight, Event::ArrowUp
+#include "gtest/gtest.h"  // for AssertionResult, Message, TestPartResult, EXPECT_EQ, EXPECT_FALSE, Test, EXPECT_TRUE, TEST
+
+namespace ftxui {
+
+TEST(DropdownTest, Empty) {
+  std::vector<std::string> list = {};
+  int index = 0;
+  auto dropdown = Dropdown(list, &index);
+
+  dropdown->OnEvent(Event::Return);
+
+  auto screen = Screen(8, 8);
+  auto document = dropdown->Render();
+  Render(screen, document);
+
+  EXPECT_EQ(screen.ToString(),
+            "╭──────╮\r\n"
+            "│↓     │\r\n"
+            "├──────┤\r\n"
+            "│      │\r\n"
+            "│      │\r\n"
+            "│      │\r\n"
+            "│      │\r\n"
+            "╰──────╯");
+}
+
+}  // namespace ftxui

src/ftxui/component/event.cpp

@@ -74,7 +74,7 @@ Event Event::CursorShape(std::string input, int shape) {
 
 /// @brief An custom event whose meaning is defined by the user of the library.
 /// @param input An arbitrary sequence of character defined by the developer.
-/// @ingroup component.
+/// @ingroup component
 // static
 Event Event::Special(std::string input) {
   Event event;

src/ftxui/component/hoverable.cpp

@@ -49,8 +49,8 @@ Component Hoverable(Component component, bool* hover) {
     }
 
    private:
-    Element Render() override {
-      return ComponentBase::Render() | reflect(box_);
+    Element OnRender() override {
+      return ComponentBase::OnRender() | reflect(box_);
     }
 
     bool OnEvent(Event event) override {
@@ -98,8 +98,8 @@ Component Hoverable(Component component,
     }
 
    private:
-    Element Render() override {
-      return ComponentBase::Render() | reflect(box_);
+    Element OnRender() override {
+      return ComponentBase::OnRender() | reflect(box_);
     }
 
     bool OnEvent(Event event) override {
@@ -159,7 +159,7 @@ ComponentDecorator Hoverable(bool* hover) {
 /// button |= Hoverable(
 ///   [&]{ on_enter_cnt++; },
 ///   [&]{ on_leave_cnt++; }
-//  );
+/// );
 /// ```
 // NOLINTNEXTLINE
 ComponentDecorator Hoverable(std::function<void()> on_enter,
@@ -182,7 +182,7 @@ ComponentDecorator Hoverable(std::function<void()> on_enter,
 /// auto button = Button("exit", screen.ExitLoopClosure());
 /// bool hovered = false;
 /// auto button_hoverable = Hoverable(button,
-//                                    [&](bool hover) { hovered = hover;});
+///                                   [&](bool hover) { hovered = hover;});
 /// ```
 // NOLINTNEXTLINE
 Component Hoverable(Component component, std::function<void(bool)> on_change) {

src/ftxui/component/input.cpp

@@ -96,9 +96,9 @@ class InputBase : public ComponentBase, public InputOption {
 
  private:
   // Component implementation:
-  Element Render() override {
+  Element OnRender() override {
     const bool is_focused = Focused();
-    const auto focused = (!is_focused && !hovered_) ? select
+    const auto focused = (!is_focused && !hovered_) ? nothing
                          : insert()                 ? focusCursorBarBlinking
                                                     : focusCursorBlockBlinking;
 
@@ -108,15 +108,12 @@ class InputBase : public ComponentBase, public InputOption {
     // placeholder.
     if (content->empty()) {
       auto element = text(placeholder()) | xflex | frame;
-      if (is_focused) {
-        element |= focus;
-      }
 
       return transform_func({
                  std::move(element), hovered_, is_focused,
                  true  // placeholder
              }) |
-             reflect(box_);
+             focus | reflect(box_);
     }
 
     Elements elements;
@@ -176,7 +173,7 @@ class InputBase : public ComponentBase, public InputOption {
       elements.push_back(element);
     }
 
-    auto element = vbox(std::move(elements)) | frame;
+    auto element = vbox(std::move(elements), cursor_line) | frame;
     return transform_func({
                std::move(element), hovered_, is_focused,
                false  // placeholder
@@ -606,6 +603,7 @@ Component Input(StringRef content, InputOption option) {
 
 /// @brief An input box for editing text.
 /// @param content The editable content.
+/// @param placeholder The placeholder text.
 /// @param option Additional optional parameters.
 /// @ingroup component
 /// @see InputBase

src/ftxui/component/maybe.cpp

@@ -24,8 +24,8 @@ Component Maybe(Component child, std::function<bool()> show) {
     explicit Impl(std::function<bool()> show) : show_(std::move(show)) {}
 
    private:
-    Element Render() override {
-      return show_() ? ComponentBase::Render() : std::make_unique<Node>();
+    Element OnRender() override {
+      return show_() ? ComponentBase::OnRender() : std::make_unique<Node>();
     }
     bool Focusable() const override {
       return show_() && ComponentBase::Focusable();

src/ftxui/component/menu.cpp

@@ -105,7 +105,7 @@ class MenuBase : public ComponentBase, public MenuOption {
     }
   }
 
-  Element Render() override {
+  Element OnRender() override {
     Clamp();
     UpdateAnimationTarget();
 
@@ -126,16 +126,15 @@ class MenuBase : public ComponentBase, public MenuOption {
           entries[i], false, is_selected, is_focused, i,
       };
 
-      auto focus_management = (selected_focus_ != i) ? nothing
-                              : is_menu_focused      ? focus
-                                                     : select;
-
-      const Element element =
-          (entries_option.transform ? entries_option.transform
-                                    : DefaultOptionTransform)  //
+      Element element = (entries_option.transform ? entries_option.transform
+                                                  : DefaultOptionTransform)  //
           (state);
-      elements.push_back(element | AnimatedColorStyle(i) | reflect(boxes_[i]) |
-                         focus_management);
+      if (selected_focus_ == i) {
+        element |= focus;
+      }
+      element |= AnimatedColorStyle(i);
+      element |= reflect(boxes_[i]);
+      elements.push_back(element);
     }
     if (elements_postfix) {
       elements.push_back(elements_postfix());
@@ -145,8 +144,9 @@ class MenuBase : public ComponentBase, public MenuOption {
       std::reverse(elements.begin(), elements.end());
     }
 
-    const Element bar =
-        IsHorizontal() ? hbox(std::move(elements)) : vbox(std::move(elements));
+    const Element bar = IsHorizontal()
+                            ? hbox(std::move(elements), selected_focus_)
+                            : vbox(std::move(elements), selected_focus_);
 
     if (!underline.enabled) {
       return bar | reflect(box_);
@@ -618,20 +618,22 @@ Component MenuEntry(MenuEntryOption option) {
         : MenuEntryOption(std::move(option)) {}
 
    private:
-    Element Render() override {
-      const bool focused = Focused();
+    Element OnRender() override {
+      const bool is_focused = Focused();
       UpdateAnimationTarget();
 
       const EntryState state{
-          label(), false, hovered_, focused, Index(),
+          label(), false, hovered_, is_focused, Index(),
       };
 
-      const Element element =
-          (transform ? transform : DefaultOptionTransform)  //
+      Element element = (transform ? transform : DefaultOptionTransform)  //
           (state);
 
-      auto focus_management = focused ? select : nothing;
-      return element | AnimatedColorStyle() | focus_management | reflect(box_);
+      if (is_focused) {
+        element |= focus;
+      }
+
+      return element | AnimatedColorStyle() | reflect(box_);
     }
 
     void UpdateAnimationTarget() {
@@ -692,7 +694,6 @@ Component MenuEntry(MenuEntryOption option) {
       animator_foreground_.OnAnimation(params);
     }
 
-    MenuEntryOption option_;
     Box box_;
     bool hovered_ = false;
 

src/ftxui/component/menu_test.cpp

@@ -266,7 +266,7 @@ TEST(MenuTest, MenuEntryIndex) {
   menu->OnEvent(Event::ArrowDown);
   menu->OnEvent(Event::ArrowDown);
   menu->OnEvent(Event::Return);
-  for (int index = 0; index < menu->ChildCount(); index++) {
+  for (size_t index = 0; index < menu->ChildCount(); index++) {
     EXPECT_EQ(menu->ChildAt(index)->Index(), index);
   }
 }

src/ftxui/component/modal.cpp

@@ -26,7 +26,7 @@ Component Modal(Component main, Component modal, const bool* show_modal) {
     }
 
    private:
-    Element Render() override {
+    Element OnRender() override {
       selector_ = *show_modal_;
       auto document = main_->Render();
       if (*show_modal_) {

src/ftxui/component/radiobox.cpp

@@ -28,7 +28,7 @@ class RadioboxBase : public ComponentBase, public RadioboxOption {
       : RadioboxOption(option) {}
 
  private:
-  Element Render() override {
+  Element OnRender() override {
     Clamp();
     Elements elements;
     const bool is_menu_focused = Focused();
@@ -36,18 +36,17 @@ class RadioboxBase : public ComponentBase, public RadioboxOption {
     for (int i = 0; i < size(); ++i) {
       const bool is_focused = (focused_entry() == i) && is_menu_focused;
       const bool is_selected = (hovered_ == i);
-      auto focus_management = !is_selected      ? nothing
-                              : is_menu_focused ? focus
-                                                : select;
       auto state = EntryState{
           entries[i], selected() == i, is_selected, is_focused, i,
       };
       auto element =
           (transform ? transform : RadioboxOption::Simple().transform)(state);
-
-      elements.push_back(element | focus_management | reflect(boxes_[i]));
+      if (is_selected) {
+        element |= focus;
+      }
+      elements.push_back(element | reflect(boxes_[i]));
     }
-    return vbox(std::move(elements)) | reflect(box_);
+    return vbox(std::move(elements), hovered_) | reflect(box_);
   }
 
   // NOLINTNEXTLINE(readability-function-cognitive-complexity)

src/ftxui/component/renderer.cpp

@@ -31,7 +31,7 @@ Component Renderer(std::function<Element()> render) {
    public:
     explicit Impl(std::function<Element()> render)
         : render_(std::move(render)) {}
-    Element Render() override { return render_(); }
+    Element OnRender() override { return render_(); }
     std::function<Element()> render_;
   };
 
@@ -88,7 +88,7 @@ Component Renderer(std::function<Element(bool)> render) {
         : render_(std::move(render)) {}
 
    private:
-    Element Render() override { return render_(Focused()) | reflect(box_); }
+    Element OnRender() override { return render_(Focused()) | reflect(box_); }
     bool Focusable() const override { return true; }
     bool OnEvent(Event event) override {
       if (event.is_mouse() && box_.Contain(event.mouse().x, event.mouse().y)) {

src/ftxui/component/resizable_split.cpp

@@ -77,16 +77,16 @@ class ResizableSplitBase : public ComponentBase {
 
     switch (options_->direction()) {
       case Direction::Left:
-        options_->main_size() = event.mouse().x - box_.x_min;
+        options_->main_size() = std::max(0, event.mouse().x - box_.x_min);
         return true;
       case Direction::Right:
-        options_->main_size() = box_.x_max - event.mouse().x;
+        options_->main_size() = std::max(0, box_.x_max - event.mouse().x);
         return true;
       case Direction::Up:
-        options_->main_size() = event.mouse().y - box_.y_min;
+        options_->main_size() = std::max(0, event.mouse().y - box_.y_min);
         return true;
       case Direction::Down:
-        options_->main_size() = box_.y_max - event.mouse().y;
+        options_->main_size() = std::max(0, box_.y_max - event.mouse().y);
         return true;
     }
 
@@ -94,7 +94,7 @@ class ResizableSplitBase : public ComponentBase {
     return false;
   }
 
-  Element Render() final {
+  Element OnRender() final {
     switch (options_->direction()) {
       case Direction::Left:
         return RenderLeft();

src/ftxui/component/screen_interactive.cpp

@@ -34,6 +34,7 @@
 #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
 
 #if defined(_WIN32)
 #define DEFINE_CONSOLEV2_PROPERTIES
@@ -576,6 +577,18 @@ void ScreenInteractive::ForceHandleCtrlZ(bool force) {
   force_handle_ctrl_z_ = force;
 }
 
+/// @brief Returns the content of the current selection
+std::string ScreenInteractive::GetSelection() {
+  if (!selection_) {
+    return "";
+  }
+  return selection_->GetParts();
+}
+
+void ScreenInteractive::SelectionChange(std::function<void()> callback) {
+  selection_on_change_ = std::move(callback);
+}
+
 /// @brief Return the currently active screen, or null if none.
 // static
 ScreenInteractive* ScreenInteractive::Active() {
@@ -751,6 +764,14 @@ void ScreenInteractive::RunOnce(Component component) {
     ExecuteSignalHandlers();
   }
   Draw(std::move(component));
+
+  if (selection_data_previous_ != selection_data_) {
+    selection_data_previous_ = selection_data_;
+    if (selection_on_change_) {
+      selection_on_change_();
+      Post(Event::Custom);
+    }
+  }
 }
 
 // private
@@ -781,7 +802,9 @@ void ScreenInteractive::HandleTask(Component component, Task& task) {
 
       arg.screen_ = this;
 
-      const bool handled = component->OnEvent(arg);
+      bool handled = component->OnEvent(arg);
+
+      handled = HandleSelection(handled, arg);
 
       if (arg == Event::CtrlC && (!handled || force_handle_ctrl_c_)) {
         RecordSignal(SIGABRT);
@@ -824,6 +847,59 @@ void ScreenInteractive::HandleTask(Component component, Task& task) {
   // clang-format on
 }
 
+// private
+bool ScreenInteractive::HandleSelection(bool handled, Event event) {
+  if (handled) {
+    selection_pending_ = nullptr;
+    selection_data_.empty = true;
+    selection_ = nullptr;
+    return true;
+  }
+
+  if (!event.is_mouse()) {
+    return false;
+  }
+
+  auto& mouse = event.mouse();
+  if (mouse.button != Mouse::Left) {
+    return false;
+  }
+
+  if (mouse.motion == Mouse::Pressed) {
+    selection_pending_ = CaptureMouse();
+    selection_data_.start_x = mouse.x;
+    selection_data_.start_y = mouse.y;
+    selection_data_.end_x = mouse.x;
+    selection_data_.end_y = mouse.y;
+    return false;
+  }
+
+  if (!selection_pending_) {
+    return false;
+  }
+
+  if (mouse.motion == Mouse::Moved) {
+    if ((mouse.x != selection_data_.end_x) ||
+        (mouse.y != selection_data_.end_y)) {
+      selection_data_.end_x = mouse.x;
+      selection_data_.end_y = mouse.y;
+      selection_data_.empty = false;
+    }
+
+    return true;
+  }
+
+  if (mouse.motion == Mouse::Released) {
+    selection_pending_ = nullptr;
+    selection_data_.end_x = mouse.x;
+    selection_data_.end_y = mouse.y;
+    selection_data_.empty = false;
+    return true;
+  }
+
+  return false;
+}
+
 // private
 // NOLINTNEXTLINE
 void ScreenInteractive::Draw(Component component) {
@@ -842,15 +918,15 @@ void ScreenInteractive::Draw(Component component) {
       break;
     case Dimension::TerminalOutput:
       dimx = terminal.dimx;
-      dimy = document->requirement().min_y;
+      dimy = util::clamp(document->requirement().min_y, 0, terminal.dimy);
       break;
     case Dimension::Fullscreen:
       dimx = terminal.dimx;
       dimy = terminal.dimy;
       break;
     case Dimension::FitComponent:
-      dimx = std::min(document->requirement().min_x, terminal.dimx);
-      dimy = std::min(document->requirement().min_y, terminal.dimy);
+      dimx = util::clamp(document->requirement().min_x, 0, terminal.dimx);
+      dimy = util::clamp(document->requirement().min_y, 0, terminal.dimy);
       break;
   }
 
@@ -899,7 +975,12 @@ void ScreenInteractive::Draw(Component component) {
 #endif
   previous_frame_resized_ = resized;
 
-  Render(*this, document);
+  selection_ = selection_data_.empty
+                   ? std::make_unique<Selection>()
+                   : std::make_unique<Selection>(
+                         selection_data_.start_x, selection_data_.start_y,  //
+                         selection_data_.end_x, selection_data_.end_y);
+  Render(*this, document.get(), *selection_);
 
   // Set cursor position for user using tools to insert CJK characters.
   {
@@ -988,4 +1069,21 @@ void ScreenInteractive::Signal(int signal) {
 #endif
 }
 
+bool ScreenInteractive::SelectionData::operator==(
+    const ScreenInteractive::SelectionData& other) const {
+  if (empty && other.empty) {
+    return true;
+  }
+  if (empty || other.empty) {
+    return false;
+  }
+  return start_x == other.start_x && start_y == other.start_y &&
+         end_x == other.end_x && end_y == other.end_y;
+}
+
+bool ScreenInteractive::SelectionData::operator!=(
+    const ScreenInteractive::SelectionData& other) const {
+  return !(*this == other);
+}
+
 }  // namespace ftxui.

src/ftxui/component/slider.cpp

@@ -16,7 +16,6 @@
 #include "ftxui/dom/elements.hpp"  // for operator|, text, Element, xflex, hbox, color, underlined, reflect, Decorator, dim, vcenter, focus, nothing, select, yflex, gaugeDirection
 #include "ftxui/screen/box.hpp"    // for Box
 #include "ftxui/screen/color.hpp"  // for Color, Color::GrayDark, Color::White
-#include "ftxui/screen/util.hpp"   // for clamp
 #include "ftxui/util/ref.hpp"      // for ConstRef, Ref, ConstStringRef
 
 namespace ftxui {
@@ -39,7 +38,7 @@ class SliderBase : public SliderOption<T>, public ComponentBase {
  public:
   explicit SliderBase(SliderOption<T> options) : SliderOption<T>(options) {}
 
-  Element Render() override {
+  Element OnRender() override {
     auto gauge_color =
         Focused() ? color(this->color_active) : color(this->color_inactive);
     const float percent =
@@ -134,53 +133,52 @@ class SliderBase : public SliderOption<T>, public ComponentBase {
     return ComponentBase::OnEvent(event);
   }
 
+  bool OnCapturedMouseEvent(Event event) {
+    if (event.mouse().motion == Mouse::Released) {
+      captured_mouse_ = nullptr;
+      return true;
+    }
+
+    T old_value = this->value();
+    switch (this->direction) {
+      case Direction::Right: {
+        this->value() = this->min() + (event.mouse().x - gauge_box_.x_min) *
+                                          (this->max() - this->min()) /
+                                          (gauge_box_.x_max - gauge_box_.x_min);
+
+        break;
+      }
+      case Direction::Left: {
+        this->value() = this->max() - (event.mouse().x - gauge_box_.x_min) *
+                                          (this->max() - this->min()) /
+                                          (gauge_box_.x_max - gauge_box_.x_min);
+        break;
+      }
+      case Direction::Down: {
+        this->value() = this->min() + (event.mouse().y - gauge_box_.y_min) *
+                                          (this->max() - this->min()) /
+                                          (gauge_box_.y_max - gauge_box_.y_min);
+        break;
+      }
+      case Direction::Up: {
+        this->value() = this->max() - (event.mouse().y - gauge_box_.y_min) *
+                                          (this->max() - this->min()) /
+                                          (gauge_box_.y_max - gauge_box_.y_min);
+        break;
+      }
+    }
+
+    this->value() = std::max(this->min(), std::min(this->max(), this->value()));
+
+    if (old_value != this->value() && this->on_change) {
+      this->on_change();
+    }
+    return true;
+  }
+
   bool OnMouseEvent(Event event) {
     if (captured_mouse_) {
-      if (event.mouse().motion == Mouse::Released) {
-        captured_mouse_ = nullptr;
-        return true;
-      }
-
-      T old_value = this->value();
-      switch (this->direction) {
-        case Direction::Right: {
-          this->value() =
-              this->min() + (event.mouse().x - gauge_box_.x_min) *
-                                (this->max() - this->min()) /
-                                (gauge_box_.x_max - gauge_box_.x_min);
-
-          break;
-        }
-        case Direction::Left: {
-          this->value() =
-              this->max() - (event.mouse().x - gauge_box_.x_min) *
-                                (this->max() - this->min()) /
-                                (gauge_box_.x_max - gauge_box_.x_min);
-          break;
-        }
-        case Direction::Down: {
-          this->value() =
-              this->min() + (event.mouse().y - gauge_box_.y_min) *
-                                (this->max() - this->min()) /
-                                (gauge_box_.y_max - gauge_box_.y_min);
-          break;
-        }
-        case Direction::Up: {
-          this->value() =
-              this->max() - (event.mouse().y - gauge_box_.y_min) *
-                                (this->max() - this->min()) /
-                                (gauge_box_.y_max - gauge_box_.y_min);
-          break;
-        }
-      }
-
-      this->value() =
-          std::max(this->min(), std::min(this->max(), this->value()));
-
-      if (old_value != this->value() && this->on_change) {
-        this->on_change();
-      }
-      return true;
+      return OnCapturedMouseEvent(event);
     }
 
     if (event.mouse().button != Mouse::Left) {
@@ -198,7 +196,7 @@ class SliderBase : public SliderOption<T>, public ComponentBase {
 
     if (captured_mouse_) {
       TakeFocus();
-      return true;
+      return OnCapturedMouseEvent(event);
     }
 
     return false;
@@ -242,19 +240,21 @@ class SliderWithLabel : public ComponentBase {
     return true;
   }
 
-  Element Render() override {
-    auto focus_management = Focused() ? focus : Active() ? select : nothing;
+  Element OnRender() override {
     auto gauge_color = (Focused() || mouse_hover_) ? color(Color::White)
                                                    : color(Color::GrayDark);
-    return hbox({
-               text(label_()) | dim | vcenter,
-               hbox({
-                   text("["),
-                   ComponentBase::Render() | underlined,
-                   text("]"),
-               }) | xflex,
-           }) |
-           gauge_color | xflex | reflect(box_) | focus_management;
+    auto element = hbox({
+                       text(label_()) | dim | vcenter,
+                       hbox({
+                           text("["),
+                           ComponentBase::Render() | underlined,
+                           text("]"),
+                       }) | xflex,
+                   }) |
+                   gauge_color | xflex | reflect(box_);
+
+    element |= focus;
+    return element;
   }
 
   ConstStringRef label_;

src/ftxui/component/slider_test.cpp

@@ -60,17 +60,17 @@ TEST(SliderTest, Right) {
   EXPECT_EQ(value, 50);
   EXPECT_EQ(updated, 0);
   EXPECT_TRUE(slider->OnEvent(MousePressed(3, 0)));
-  EXPECT_EQ(value, 50);
-  EXPECT_EQ(updated, 0);
+  EXPECT_EQ(value, 30);
+  EXPECT_EQ(updated, 1);
   EXPECT_TRUE(slider->OnEvent(MousePressed(9, 0)));
   EXPECT_EQ(value, 90);
-  EXPECT_EQ(updated, 1);
+  EXPECT_EQ(updated, 2);
   EXPECT_TRUE(slider->OnEvent(MousePressed(9, 2)));
   EXPECT_EQ(value, 90);
-  EXPECT_EQ(updated, 1);
+  EXPECT_EQ(updated, 2);
   EXPECT_TRUE(slider->OnEvent(MousePressed(5, 2)));
   EXPECT_EQ(value, 50);
-  EXPECT_EQ(updated, 2);
+  EXPECT_EQ(updated, 3);
   EXPECT_TRUE(slider->OnEvent(MouseReleased(5, 2)));
   EXPECT_FALSE(slider->OnEvent(MousePressed(5, 2)));
   EXPECT_EQ(value, 50);
@@ -92,17 +92,17 @@ TEST(SliderTest, Left) {
   EXPECT_EQ(value, 50);
   EXPECT_EQ(updated, 0);
   EXPECT_TRUE(slider->OnEvent(MousePressed(3, 0)));
-  EXPECT_EQ(value, 50);
-  EXPECT_EQ(updated, 0);
+  EXPECT_EQ(value, 70);
+  EXPECT_EQ(updated, 1);
   EXPECT_TRUE(slider->OnEvent(MousePressed(9, 0)));
   EXPECT_EQ(value, 10);
-  EXPECT_EQ(updated, 1);
+  EXPECT_EQ(updated, 2);
   EXPECT_TRUE(slider->OnEvent(MousePressed(9, 2)));
   EXPECT_EQ(value, 10);
-  EXPECT_EQ(updated, 1);
+  EXPECT_EQ(updated, 2);
   EXPECT_TRUE(slider->OnEvent(MousePressed(5, 2)));
   EXPECT_EQ(value, 50);
-  EXPECT_EQ(updated, 2);
+  EXPECT_EQ(updated, 3);
   EXPECT_TRUE(slider->OnEvent(MouseReleased(5, 2)));
   EXPECT_FALSE(slider->OnEvent(MousePressed(5, 2)));
   EXPECT_EQ(value, 50);
@@ -124,21 +124,21 @@ TEST(SliderTest, Down) {
   EXPECT_EQ(value, 50);
   EXPECT_EQ(updated, 0);
   EXPECT_TRUE(slider->OnEvent(MousePressed(0, 3)));
-  EXPECT_EQ(value, 50);
-  EXPECT_EQ(updated, 0);
+  EXPECT_EQ(value, 30);
+  EXPECT_EQ(updated, 1);
   EXPECT_TRUE(slider->OnEvent(MousePressed(0, 9)));
   EXPECT_EQ(value, 90);
-  EXPECT_EQ(updated, 1);
+  EXPECT_EQ(updated, 2);
   EXPECT_TRUE(slider->OnEvent(MousePressed(2, 9)));
   EXPECT_EQ(value, 90);
-  EXPECT_EQ(updated, 1);
+  EXPECT_EQ(updated, 2);
   EXPECT_TRUE(slider->OnEvent(MousePressed(2, 5)));
   EXPECT_EQ(value, 50);
-  EXPECT_EQ(updated, 2);
+  EXPECT_EQ(updated, 3);
   EXPECT_TRUE(slider->OnEvent(MouseReleased(2, 5)));
   EXPECT_FALSE(slider->OnEvent(MousePressed(2, 5)));
   EXPECT_EQ(value, 50);
-  EXPECT_EQ(updated, 2);
+  EXPECT_EQ(updated, 3);
 }
 
 TEST(SliderTest, Up) {
@@ -157,17 +157,17 @@ TEST(SliderTest, Up) {
   EXPECT_EQ(value, 50);
   EXPECT_EQ(updated, 0);
   EXPECT_TRUE(slider->OnEvent(MousePressed(0, 3)));
-  EXPECT_EQ(value, 50);
-  EXPECT_EQ(updated, 0);
+  EXPECT_EQ(value, 70);
+  EXPECT_EQ(updated, 1);
   EXPECT_TRUE(slider->OnEvent(MousePressed(0, 9)));
   EXPECT_EQ(value, 10);
-  EXPECT_EQ(updated, 1);
+  EXPECT_EQ(updated, 2);
   EXPECT_TRUE(slider->OnEvent(MousePressed(2, 9)));
   EXPECT_EQ(value, 10);
-  EXPECT_EQ(updated, 1);
+  EXPECT_EQ(updated, 2);
   EXPECT_TRUE(slider->OnEvent(MousePressed(2, 5)));
   EXPECT_EQ(value, 50);
-  EXPECT_EQ(updated, 2);
+  EXPECT_EQ(updated, 3);
   EXPECT_TRUE(slider->OnEvent(MouseReleased(2, 5)));
   EXPECT_FALSE(slider->OnEvent(MousePressed(2, 5)));
   EXPECT_EQ(value, 50);

src/ftxui/component/window.cpp

@@ -124,7 +124,7 @@ class WindowImpl : public ComponentBase, public WindowOptions {
   }
 
  private:
-  Element Render() final {
+  Element OnRender() final {
     auto element = ComponentBase::Render();
 
     const bool captureable =

src/ftxui/dom/border.cpp

@@ -54,10 +54,10 @@ class Border : public Node {
       requirement_.min_x =
           std::max(requirement_.min_x, children_[1]->requirement().min_x + 2);
     }
-    requirement_.selected_box.x_min++;
-    requirement_.selected_box.x_max++;
-    requirement_.selected_box.y_min++;
-    requirement_.selected_box.y_max++;
+    requirement_.focused.box.x_min++;
+    requirement_.focused.box.x_max++;
+    requirement_.focused.box.y_min++;
+    requirement_.focused.box.y_max++;
   }
 
   void SetBox(Box box) override {
@@ -65,7 +65,8 @@ class Border : public Node {
     if (children_.size() == 2) {
       Box title_box;
       title_box.x_min = box.x_min + 1;
-      title_box.x_max = std::min(box.x_max - 1, box.x_min + children_[1]->requirement().min_x);
+      title_box.x_max = std::min(box.x_max - 1,
+                                 box.x_min + children_[1]->requirement().min_x);
       title_box.y_min = box.y_min;
       title_box.y_max = box.y_min;
       children_[1]->SetBox(title_box);
@@ -145,10 +146,8 @@ class BorderPixel : public Node {
       requirement_.min_x =
           std::max(requirement_.min_x, children_[1]->requirement().min_x + 2);
     }
-    requirement_.selected_box.x_min++;
-    requirement_.selected_box.x_max++;
-    requirement_.selected_box.y_min++;
-    requirement_.selected_box.y_max++;
+
+    requirement_.focused.box.Shift(1, 1);
   }
 
   void SetBox(Box box) override {

src/ftxui/dom/box_helper.hpp

@@ -5,6 +5,7 @@
 #define FTXUI_DOM_BOX_HELPER_HPP
 
 #include <vector>
+#include "ftxui/dom/requirement.hpp"
 
 namespace ftxui::box_helper {
 
@@ -19,7 +20,6 @@ struct Element {
 };
 
 void Compute(std::vector<Element>* elements, int target_size);
-
 }  // namespace ftxui::box_helper
 
 #endif /* end of include guard: FTXUI_DOM_BOX_HELPER_HPP */

src/ftxui/dom/dbox.cpp

@@ -21,24 +21,20 @@ class DBox : public Node {
   explicit DBox(Elements children) : Node(std::move(children)) {}
 
   void ComputeRequirement() override {
-    requirement_.min_x = 0;
-    requirement_.min_y = 0;
-    requirement_.flex_grow_x = 0;
-    requirement_.flex_grow_y = 0;
-    requirement_.flex_shrink_x = 0;
-    requirement_.flex_shrink_y = 0;
-    requirement_.selection = Requirement::NORMAL;
+    requirement_ = Requirement{};
     for (auto& child : children_) {
       child->ComputeRequirement();
+
+      // Propagate the focused requirement.
+      if (requirement_.focused.Prefer(child->requirement().focused)) {
+        requirement_.focused = child->requirement().focused;
+      }
+
+      // Extend the min_x and min_y to contain all the children
       requirement_.min_x =
           std::max(requirement_.min_x, child->requirement().min_x);
       requirement_.min_y =
           std::max(requirement_.min_y, child->requirement().min_y);
-
-      if (requirement_.selection < child->requirement().selection) {
-        requirement_.selection = child->requirement().selection;
-        requirement_.selected_box = child->requirement().selected_box;
-      }
     }
   }
 
@@ -49,58 +45,6 @@ class DBox : public Node {
       child->SetBox(box);
     }
   }
-
-  void Render(Screen& screen) override {
-    if (children_.size() <= 1) {
-      Node::Render(screen);
-      return;
-    }
-
-    const int width = box_.x_max - box_.x_min + 1;
-    const int height = box_.y_max - box_.y_min + 1;
-    std::vector<Pixel> pixels(std::size_t(width * height));
-
-    for (auto& child : children_) {
-      child->Render(screen);
-
-      // Accumulate the pixels
-      Pixel* acc = pixels.data();
-      for (int x = 0; x < width; ++x) {
-        for (int y = 0; y < height; ++y) {
-          auto& pixel = screen.PixelAt(x + box_.x_min, y + box_.y_min);
-          acc->background_color =
-              Color::Blend(acc->background_color, pixel.background_color);
-          acc->automerge = pixel.automerge || acc->automerge;
-          if (pixel.character.empty()) {
-            acc->foreground_color =
-                Color::Blend(acc->foreground_color, pixel.background_color);
-          } else {
-            acc->blink = pixel.blink;
-            acc->bold = pixel.bold;
-            acc->dim = pixel.dim;
-            acc->inverted = pixel.inverted;
-            acc->underlined = pixel.underlined;
-            acc->underlined_double = pixel.underlined_double;
-            acc->strikethrough = pixel.strikethrough;
-            acc->hyperlink = pixel.hyperlink;
-            acc->character = pixel.character;
-            acc->foreground_color = pixel.foreground_color;
-          }
-          ++acc;  // NOLINT
-
-          pixel = Pixel();
-        }
-      }
-    }
-
-    // Render the accumulated pixels:
-    Pixel* acc = pixels.data();
-    for (int x = 0; x < width; ++x) {
-      for (int y = 0; y < height; ++y) {
-        screen.PixelAt(x + box_.x_min, y + box_.y_min) = *acc++;  // NOLINT
-      }
-    }
-  }
 };
 }  // namespace
 

src/ftxui/dom/flex.cpp

@@ -80,6 +80,7 @@ class Flex : public Node {
   }
 
   void SetBox(Box box) override {
+    Node::SetBox(box);
     if (children_.empty()) {
       return;
     }

src/ftxui/dom/flexbox.cpp

@@ -4,6 +4,7 @@
 #include <algorithm>  // for min, max
 #include <cstddef>    // for size_t
 #include <memory>  // for __shared_ptr_access, shared_ptr, allocator_traits<>::value_type, make_shared
+#include <tuple>   // for ignore
 #include <utility>  // for move, swap
 #include <vector>   // for vector
 
@@ -12,6 +13,7 @@
 #include "ftxui/dom/flexbox_helper.hpp"  // for Block, Global, Compute
 #include "ftxui/dom/node.hpp"            // for Node, Elements, Node::Status
 #include "ftxui/dom/requirement.hpp"     // for Requirement
+#include "ftxui/dom/selection.hpp"       // for Selection
 #include "ftxui/screen/box.hpp"          // for Box
 
 namespace ftxui {
@@ -89,37 +91,32 @@ class Flexbox : public Node {
   }
 
   void ComputeRequirement() override {
+    requirement_ = Requirement{};
     for (auto& child : children_) {
       child->ComputeRequirement();
     }
-    flexbox_helper::Global global;
-    global.config = config_normalized_;
+    global_ = flexbox_helper::Global();
+    global_.config = config_normalized_;
     if (IsColumnOriented()) {
-      global.size_x = 100000;  // NOLINT
-      global.size_y = asked_;
+      global_.size_x = 100000;  // NOLINT
+      global_.size_y = asked_;
     } else {
-      global.size_x = asked_;
-      global.size_y = 100000;  // NOLINT
+      global_.size_x = asked_;
+      global_.size_y = 100000;  // NOLINT
     }
-    Layout(global, true);
+    Layout(global_, true);
 
-    // Reset:
-    requirement_.selection = Requirement::Selection::NORMAL;
-    requirement_.selected_box = Box();
-    requirement_.min_x = 0;
-    requirement_.min_y = 0;
-
-    if (global.blocks.empty()) {
+    if (global_.blocks.empty()) {
       return;
     }
 
     // Compute the union of all the blocks:
     Box box;
-    box.x_min = global.blocks[0].x;
-    box.y_min = global.blocks[0].y;
-    box.x_max = global.blocks[0].x + global.blocks[0].dim_x;
-    box.y_max = global.blocks[0].y + global.blocks[0].dim_y;
-    for (auto& b : global.blocks) {
+    box.x_min = global_.blocks[0].x;
+    box.y_min = global_.blocks[0].y;
+    box.x_max = global_.blocks[0].x + global_.blocks[0].dim_x;
+    box.y_max = global_.blocks[0].y + global_.blocks[0].dim_y;
+    for (auto& b : global_.blocks) {
       box.x_min = std::min(box.x_min, b.x);
       box.y_min = std::min(box.y_min, b.y);
       box.x_max = std::max(box.x_max, b.x + b.dim_x);
@@ -130,19 +127,14 @@ class Flexbox : public Node {
 
     // Find the selection:
     for (size_t i = 0; i < children_.size(); ++i) {
-      if (requirement_.selection >= children_[i]->requirement().selection) {
-        continue;
+      if (requirement_.focused.Prefer(children_[i]->requirement().focused)) {
+        requirement_.focused = children_[i]->requirement().focused;
+        // Shift |focused.box| according to its position inside this component:
+        auto& b = global_.blocks[i];
+        requirement_.focused.box.Shift(b.x, b.y);
+        requirement_.focused.box =
+            Box::Intersection(requirement_.focused.box, box);
       }
-      requirement_.selection = children_[i]->requirement().selection;
-      Box selected_box = children_[i]->requirement().selected_box;
-
-      // Shift |selected_box| according to its position inside this component:
-      auto& b = global.blocks[i];
-      selected_box.x_min += b.x;
-      selected_box.y_min += b.y;
-      selected_box.x_max += b.x;
-      selected_box.y_max += b.y;
-      requirement_.selected_box = Box::Intersection(selected_box, box);
     }
   }
 
@@ -177,6 +169,43 @@ class Flexbox : public Node {
     }
   }
 
+  void Select(Selection& selection) override {
+    // If this Node box_ doesn't intersect with the selection, then no
+    // selection.
+    if (Box::Intersection(selection.GetBox(), box_).IsEmpty()) {
+      return;
+    }
+
+    Selection selection_lines = IsColumnOriented()
+                                    ? selection.SaturateVertical(box_)
+                                    : selection.SaturateHorizontal(box_);
+
+    size_t i = 0;
+    for (auto& line : global_.lines) {
+      Box box;
+      box.x_min = box_.x_min + line.x;
+      box.x_max = box_.x_min + line.x + line.dim_x - 1;
+      box.y_min = box_.y_min + line.y;
+      box.y_max = box_.y_min + line.y + line.dim_y - 1;
+
+      // If the line box doesn't intersect with the selection, then no
+      // selection.
+      if (Box::Intersection(selection.GetBox(), box).IsEmpty()) {
+        continue;
+      }
+
+      Selection selection_line = IsColumnOriented()
+                                     ? selection_lines.SaturateHorizontal(box)
+                                     : selection_lines.SaturateVertical(box);
+
+      for (auto& block : line.blocks) {
+        std::ignore = block;
+        children_[i]->Select(selection_line);
+        i++;
+      }
+    }
+  }
+
   void Check(Status* status) override {
     for (auto& child : children_) {
       child->Check(status);
@@ -194,6 +223,7 @@ class Flexbox : public Node {
   bool need_iteration_ = true;
   const FlexboxConfig config_;
   const FlexboxConfig config_normalized_;
+  flexbox_helper::Global global_;
 };
 
 }  // namespace
@@ -212,11 +242,11 @@ class Flexbox : public Node {
 ///   text("element 2"),
 ///   text("element 3"),
 /// }, FlexboxConfig()
-//       .Set(FlexboxConfig::Direction::Column)
-//       .Set(FlexboxConfig::Wrap::WrapInversed)
-//       .SetGapMainAxis(1)
-//       .SetGapCrossAxis(1)
-//  )
+///      .Set(FlexboxConfig::Direction::Column)
+///      .Set(FlexboxConfig::Wrap::WrapInversed)
+///      .SetGapMainAxis(1)
+///      .SetGapCrossAxis(1)
+/// )
 /// ```
 Element flexbox(Elements children, FlexboxConfig config) {
   return std::make_shared<Flexbox>(std::move(children), config);

src/ftxui/dom/flexbox_helper.cpp

@@ -68,6 +68,10 @@ void SymmetryXY(Global& g) {
     std::swap(b.x, b.y);
     std::swap(b.dim_x, b.dim_y);
   }
+  for (auto& l : g.lines) {
+    std::swap(l.x, l.y);
+    std::swap(l.dim_x, l.dim_y);
+  }
 }
 
 void SymmetryX(Global& g) {
@@ -75,6 +79,9 @@ void SymmetryX(Global& g) {
   for (auto& b : g.blocks) {
     b.x = g.size_x - b.x - b.dim_x;
   }
+  for (auto& l : g.lines) {
+    l.x = g.size_x - l.x - l.dim_x;
+  }
 }
 
 void SymmetryY(Global& g) {
@@ -82,14 +89,13 @@ void SymmetryY(Global& g) {
   for (auto& b : g.blocks) {
     b.y = g.size_y - b.y - b.dim_y;
   }
+  for (auto& l : g.lines) {
+    l.y = g.size_y - l.y - l.dim_y;
+  }
 }
 
-struct Line {
-  std::vector<Block*> blocks;
-};
-
-void SetX(Global& global, std::vector<Line> lines) {
-  for (auto& line : lines) {
+void SetX(Global& global) {
+  for (auto& line : global.lines) {
     std::vector<box_helper::Element> elements;
     elements.reserve(line.blocks.size());
     for (auto* block : line.blocks) {
@@ -110,19 +116,24 @@ void SetX(Global& global, std::vector<Line> lines) {
 
     int x = 0;
     for (size_t i = 0; i < line.blocks.size(); ++i) {
-      line.blocks[i]->dim_x = elements[i].size;
       line.blocks[i]->x = x;
+      line.blocks[i]->dim_x = elements[i].size;
       x += elements[i].size;
       x += global.config.gap_x;
     }
   }
+
+  for (auto& line : global.lines) {
+    line.x = 0;
+    line.dim_x = global.size_x;
+  }
 }
 
 // NOLINTNEXTLINE(readability-function-cognitive-complexity)
-void SetY(Global& g, std::vector<Line> lines) {
+void SetY(Global& g) {
   std::vector<box_helper::Element> elements;
-  elements.reserve(lines.size());
-  for (auto& line : lines) {
+  elements.reserve(g.lines.size());
+  for (auto& line : g.lines) {
     box_helper::Element element;
     element.flex_shrink = line.blocks.front()->flex_shrink_y;
     element.flex_grow = line.blocks.front()->flex_grow_y;
@@ -202,9 +213,9 @@ void SetY(Global& g, std::vector<Line> lines) {
   }
 
   // [Align items]
-  for (size_t i = 0; i < lines.size(); ++i) {
+  for (size_t i = 0; i < g.lines.size(); ++i) {
     auto& element = elements[i];
-    for (auto* block : lines[i].blocks) {
+    for (auto* block : g.lines[i].blocks) {
       const bool stretch =
           block->flex_grow_y != 0 ||
           g.config.align_content == FlexboxConfig::AlignContent::Stretch;
@@ -237,10 +248,16 @@ void SetY(Global& g, std::vector<Line> lines) {
       }
     }
   }
+
+  ys.push_back(g.size_y);
+  for (size_t i = 0; i < g.lines.size(); ++i) {
+    g.lines[i].y = ys[i];
+    g.lines[i].dim_y = ys[i + 1] - ys[i];
+  }
 }
 
-void JustifyContent(Global& g, std::vector<Line> lines) {
-  for (auto& line : lines) {
+void JustifyContent(Global& g) {
+  for (auto& line : g.lines) {
     Block* last = line.blocks.back();
     int remaining_space = g.size_x - last->x - last->dim_x;
     switch (g.config.justify_content) {
@@ -315,38 +332,36 @@ void Compute2(Global& global) {
 
 void Compute3(Global& global) {
   // Step 1: Lay out every elements into rows:
-  std::vector<Line> lines;
   {
     Line line;
     int x = 0;
-    line.blocks.reserve(global.blocks.size());
     for (auto& block : global.blocks) {
       // Does it fit the end of the row?
       // No? Then we need to start a new one:
       if (x + block.min_size_x > global.size_x) {
         x = 0;
         if (!line.blocks.empty()) {
-          lines.push_back(std::move(line));
+          global.lines.push_back(std::move(line));
         }
         line = Line();
       }
 
-      block.line = static_cast<int>(lines.size());
+      block.line = static_cast<int>(global.lines.size());
       block.line_position = static_cast<int>(line.blocks.size());
       line.blocks.push_back(&block);
       x += block.min_size_x + global.config.gap_x;
     }
     if (!line.blocks.empty()) {
-      lines.push_back(std::move(line));
+      global.lines.push_back(std::move(line));
     }
   }
 
   // Step 2: Set positions on the X axis.
-  SetX(global, lines);
-  JustifyContent(global, lines);  // Distribute remaining space.
+  SetX(global);
+  JustifyContent(global);  // Distribute remaining space.
 
   // Step 3: Set positions on the Y axis.
-  SetY(global, lines);
+  SetY(global);
 }
 
 }  // namespace

src/ftxui/dom/flexbox_helper.hpp

@@ -9,6 +9,7 @@
 
 namespace ftxui::flexbox_helper {
 
+// A block is a rectangle in the flexbox.
 struct Block {
   // Input:
   int min_size_x = 0;
@@ -28,8 +29,18 @@ struct Block {
   bool overflow = false;
 };
 
+// A line is a row of blocks.
+struct Line {
+  std::vector<Block*> blocks;
+  int x = 0;
+  int y = 0;
+  int dim_x = 0;
+  int dim_y = 0;
+};
+
 struct Global {
   std::vector<Block> blocks;
+  std::vector<Line> lines;
   FlexboxConfig config;
   int size_x;
   int size_y;

src/ftxui/dom/focus.cpp

@@ -36,13 +36,12 @@ Decorator focusPositionRelative(float x, float y) {
 
     void ComputeRequirement() override {
       NodeDecorator::ComputeRequirement();
-      requirement_.selection = Requirement::Selection::NORMAL;
-
-      Box& box = requirement_.selected_box;
-      box.x_min = int(float(requirement_.min_x) * x_);
-      box.y_min = int(float(requirement_.min_y) * y_);
-      box.x_max = int(float(requirement_.min_x) * x_);
-      box.y_max = int(float(requirement_.min_y) * y_);
+      requirement_.focused.enabled = true;
+      requirement_.focused.node = this;
+      requirement_.focused.box.x_min = int(float(requirement_.min_x) * x_);
+      requirement_.focused.box.y_min = int(float(requirement_.min_y) * y_);
+      requirement_.focused.box.x_max = int(float(requirement_.min_x) * x_);
+      requirement_.focused.box.y_max = int(float(requirement_.min_y) * y_);
     }
 
    private:
@@ -75,9 +74,9 @@ Decorator focusPosition(int x, int y) {
 
     void ComputeRequirement() override {
       NodeDecorator::ComputeRequirement();
-      requirement_.selection = Requirement::Selection::NORMAL;
+      requirement_.focused.enabled = false;
 
-      Box& box = requirement_.selected_box;
+      Box& box = requirement_.focused.box;
       box.x_min = x_;
       box.y_min = y_;
       box.x_max = x_;

src/ftxui/dom/frame.cpp

@@ -6,28 +6,28 @@
 #include <utility>    // for move
 
 #include "ftxui/dom/elements.hpp"  // for Element, unpack, Elements, focus, frame, select, xframe, yframe
-#include "ftxui/dom/node.hpp"  // for Node, Elements
-#include "ftxui/dom/requirement.hpp"  // for Requirement, Requirement::FOCUSED, Requirement::SELECTED
-#include "ftxui/screen/box.hpp"      // for Box
-#include "ftxui/screen/screen.hpp"   // for Screen, Screen::Cursor
-#include "ftxui/util/autoreset.hpp"  // for AutoReset
+#include "ftxui/dom/node.hpp"         // for Node, Elements
+#include "ftxui/dom/requirement.hpp"  // for Requirement
+#include "ftxui/screen/box.hpp"       // for Box
+#include "ftxui/screen/screen.hpp"    // for Screen, Screen::Cursor
+#include "ftxui/util/autoreset.hpp"   // for AutoReset
 
 namespace ftxui {
 
 namespace {
-class Select : public Node {
+class Focus : public Node {
  public:
-  explicit Select(Elements children) : Node(std::move(children)) {}
+  explicit Focus(Elements children) : Node(std::move(children)) {}
 
   void ComputeRequirement() override {
     Node::ComputeRequirement();
     requirement_ = children_[0]->requirement();
-    auto& selected_box = requirement_.selected_box;
-    selected_box.x_min = 0;
-    selected_box.y_min = 0;
-    selected_box.x_max = requirement_.min_x - 1;
-    selected_box.y_max = requirement_.min_y - 1;
-    requirement_.selection = Requirement::SELECTED;
+    requirement_.focused.enabled = true;
+    requirement_.focused.node = this;
+    requirement_.focused.box.x_min = 0;
+    requirement_.focused.box.y_min = 0;
+    requirement_.focused.box.x_max = requirement_.min_x - 1;
+    requirement_.focused.box.y_max = requirement_.min_y - 1;
   }
 
   void SetBox(Box box) override {
@@ -36,65 +36,21 @@ class Select : public Node {
   }
 };
 
-class Focus : public Select {
- public:
-  using Select::Select;
-
-  void ComputeRequirement() override {
-    Select::ComputeRequirement();
-    requirement_.selection = Requirement::FOCUSED;
-  }
-
-  void Render(Screen& screen) override {
-    Select::Render(screen);
-
-    // Setting the cursor to the right position allow folks using CJK (China,
-    // Japanese, Korean, ...) characters to see their [input method editor]
-    // displayed at the right location. See [issue].
-    //
-    // [input method editor]:
-    // https://en.wikipedia.org/wiki/Input_method
-    //
-    // [issue]:
-    // https://github.com/ArthurSonzogni/FTXUI/issues/2#issuecomment-505282355
-    //
-    // Unfortunately, Microsoft terminal do not handle properly hidding the
-    // cursor. Instead the character under the cursor is hidden, which is a big
-    // problem. As a result, we can't enable setting cursor to the right
-    // location. It will be displayed at the bottom right corner.
-    // See:
-    // https://github.com/microsoft/terminal/issues/1203
-    // https://github.com/microsoft/terminal/issues/3093
-#if !defined(FTXUI_MICROSOFT_TERMINAL_FALLBACK)
-    screen.SetCursor(Screen::Cursor{
-        box_.x_min,
-        box_.y_min,
-        Screen::Cursor::Shape::Hidden,
-    });
-#endif
-  }
-};
-
 class Frame : public Node {
  public:
   Frame(Elements children, bool x_frame, bool y_frame)
       : Node(std::move(children)), x_frame_(x_frame), y_frame_(y_frame) {}
 
-  void ComputeRequirement() override {
-    Node::ComputeRequirement();
-    requirement_ = children_[0]->requirement();
-  }
-
   void SetBox(Box box) override {
     Node::SetBox(box);
-    auto& selected_box = requirement_.selected_box;
+    auto& focused_box = requirement_.focused.box;
     Box children_box = box;
 
     if (x_frame_) {
       const int external_dimx = box.x_max - box.x_min;
       const int internal_dimx = std::max(requirement_.min_x, external_dimx);
-      const int focused_dimx = selected_box.x_max - selected_box.x_min;
-      int dx = selected_box.x_min - external_dimx / 2 + focused_dimx / 2;
+      const int focused_dimx = focused_box.x_max - focused_box.x_min;
+      int dx = focused_box.x_min - external_dimx / 2 + focused_dimx / 2;
       dx = std::max(0, std::min(internal_dimx - external_dimx - 1, dx));
       children_box.x_min = box.x_min - dx;
       children_box.x_max = box.x_min + internal_dimx - dx;
@@ -103,8 +59,8 @@ class Frame : public Node {
     if (y_frame_) {
       const int external_dimy = box.y_max - box.y_min;
       const int internal_dimy = std::max(requirement_.min_y, external_dimy);
-      const int focused_dimy = selected_box.y_max - selected_box.y_min;
-      int dy = selected_box.y_min - external_dimy / 2 + focused_dimy / 2;
+      const int focused_dimy = focused_box.y_max - focused_box.y_min;
+      int dy = focused_box.y_min - external_dimy / 2 + focused_dimy / 2;
       dy = std::max(0, std::min(internal_dimy - external_dimy - 1, dy));
       children_box.y_min = box.y_min - dy;
       children_box.y_max = box.y_min + internal_dimy - dy;
@@ -130,33 +86,29 @@ class FocusCursor : public Focus {
       : Focus(std::move(children)), shape_(shape) {}
 
  private:
-  void Render(Screen& screen) override {
-    Select::Render(screen);  // NOLINT
-    screen.SetCursor(Screen::Cursor{
-        box_.x_min,
-        box_.y_min,
-        shape_,
-    });
+  void ComputeRequirement() override {
+    Focus::ComputeRequirement();  // NOLINT
+    requirement_.focused.cursor_shape = shape_;
   }
   Screen::Cursor::Shape shape_;
 };
 
 }  // namespace
 
-/// @brief Set the `child` to be the one selected among its siblings.
-/// @param child The element to be selected.
-/// @ingroup dom
-Element select(Element child) {
-  return std::make_shared<Select>(unpack(std::move(child)));
-}
-
-/// @brief Set the `child` to be the one in focus globally.
+/// @brief Set the `child` to be the one focused among its siblings.
 /// @param child The element to be focused.
 /// @ingroup dom
 Element focus(Element child) {
   return std::make_shared<Focus>(unpack(std::move(child)));
 }
 
+/// This is deprecated. Use `focus` instead.
+/// @brief Set the `child` to be the one focused among its siblings.
+/// @param child The element to be focused.
+Element select(Element child) {
+  return focus(std::move(child));
+}
+
 /// @brief Allow an element to be displayed inside a 'virtual' area. It size can
 /// be larger than its container. In this case only a smaller portion is
 /// displayed. The view is scrollable to make the focused element visible.

src/ftxui/dom/gauge.cpp

@@ -164,7 +164,7 @@ class Gauge : public Node {
 /// @brief Draw a high definition progress bar progressing in specified
 /// direction.
 /// @param progress The proportion of the area to be filled. Belong to [0,1].
-//  @param direction Direction of progress bars progression.
+/// @param direction Direction of progress bars progression.
 /// @ingroup dom
 Element gaugeDirection(float progress, Direction direction) {
   return std::make_shared<Gauge>(progress, direction);

src/ftxui/dom/gridbox.cpp

@@ -49,13 +49,7 @@ class GridBox : public Node {
   }
 
   void ComputeRequirement() override {
-    requirement_.min_x = 0;
-    requirement_.min_y = 0;
-    requirement_.flex_grow_x = 0;
-    requirement_.flex_grow_y = 0;
-    requirement_.flex_shrink_x = 0;
-    requirement_.flex_shrink_y = 0;
-
+    requirement_ = Requirement{};
     for (auto& line : lines_) {
       for (auto& cell : line) {
         cell->ComputeRequirement();
@@ -75,19 +69,15 @@ class GridBox : public Node {
     requirement_.min_x = Integrate(size_x);
     requirement_.min_y = Integrate(size_y);
 
-    // Forward the selected/focused child state:
-    requirement_.selection = Requirement::NORMAL;
+    // Forward the focused/focused child state:
     for (int x = 0; x < x_size; ++x) {
       for (int y = 0; y < y_size; ++y) {
-        if (requirement_.selection >= lines_[y][x]->requirement().selection) {
+        if (requirement_.focused.enabled ||
+            !lines_[y][x]->requirement().focused.enabled) {
           continue;
         }
-        requirement_.selection = lines_[y][x]->requirement().selection;
-        requirement_.selected_box = lines_[y][x]->requirement().selected_box;
-        requirement_.selected_box.x_min += size_x[x];
-        requirement_.selected_box.x_max += size_x[x];
-        requirement_.selected_box.y_min += size_y[y];
-        requirement_.selected_box.y_max += size_y[y];
+        requirement_.focused = lines_[y][x]->requirement().focused;
+        requirement_.focused.box.Shift(size_x[x], size_y[y]);
       }
     }
   }

src/ftxui/dom/gridbox_test.cpp

@@ -7,7 +7,7 @@
 #include <string>     // for allocator, basic_string, string
 #include <vector>     // for vector
 
-#include "ftxui/dom/elements.hpp"  // for text, operator|, Element, flex, Elements, flex_grow, flex_shrink, vtext, gridbox, vbox, focus, operator|=, border, frame
+#include "ftxui/dom/elements.hpp"  // for text, operator|, Element, flex, Elements, flex_grow, flex_shrink, vtext, gridbox, vbox, select, operator|=, border, frame
 #include "ftxui/dom/node.hpp"      // for Render
 #include "ftxui/screen/screen.hpp"  // for Screen
 

src/ftxui/dom/hbox.cpp

@@ -11,8 +11,8 @@
 #include "ftxui/dom/elements.hpp"     // for Element, Elements, hbox
 #include "ftxui/dom/node.hpp"         // for Node, Elements
 #include "ftxui/dom/requirement.hpp"  // for Requirement
+#include "ftxui/dom/selection.hpp"    // for Selection
 #include "ftxui/screen/box.hpp"       // for Box
-
 namespace ftxui {
 
 namespace {
@@ -20,22 +20,20 @@ class HBox : public Node {
  public:
   explicit HBox(Elements children) : Node(std::move(children)) {}
 
+ private:
   void ComputeRequirement() override {
-    requirement_.min_x = 0;
-    requirement_.min_y = 0;
-    requirement_.flex_grow_x = 0;
-    requirement_.flex_grow_y = 0;
-    requirement_.flex_shrink_x = 0;
-    requirement_.flex_shrink_y = 0;
-    requirement_.selection = Requirement::NORMAL;
+    requirement_ = Requirement{};
+
     for (auto& child : children_) {
       child->ComputeRequirement();
-      if (requirement_.selection < child->requirement().selection) {
-        requirement_.selection = child->requirement().selection;
-        requirement_.selected_box = child->requirement().selected_box;
-        requirement_.selected_box.x_min += requirement_.min_x;
-        requirement_.selected_box.x_max += requirement_.min_x;
+
+      // Propagate the focused requirement.
+      if (requirement_.focused.Prefer(child->requirement().focused)) {
+        requirement_.focused = child->requirement().focused;
+        requirement_.focused.box.Shift(requirement_.min_x, 0);
       }
+
+      // Extend the min_x and min_y to contain all the children
       requirement_.min_x += child->requirement().min_x;
       requirement_.min_y =
           std::max(requirement_.min_y, child->requirement().min_y);
@@ -64,6 +62,19 @@ class HBox : public Node {
       x = box.x_max + 1;
     }
   }
+
+  void Select(Selection& selection) override {
+    // If this Node box_ doesn't intersect with the selection, then no
+    // selection.
+    if (Box::Intersection(selection.GetBox(), box_).IsEmpty()) {
+      return;
+    }
+
+    Selection selection_saturated = selection.SaturateHorizontal(box_);
+    for (auto& child : children_) {
+      child->Select(selection_saturated);
+    }
+  }
 };
 
 }  // namespace

src/ftxui/dom/italic.cpp

@@ -0,0 +1,35 @@
+// 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 <memory>   // for make_shared
+#include <utility>  // for move
+
+#include "ftxui/dom/elements.hpp"        // for Element, underlinedDouble
+#include "ftxui/dom/node.hpp"            // for Node
+#include "ftxui/dom/node_decorator.hpp"  // for NodeDecorator
+#include "ftxui/screen/box.hpp"          // for Box
+#include "ftxui/screen/screen.hpp"       // for Pixel, Screen
+
+namespace ftxui {
+
+/// @brief Apply a underlinedDouble to text.
+/// @ingroup dom
+Element italic(Element child) {
+  class Impl : public NodeDecorator {
+   public:
+    using NodeDecorator::NodeDecorator;
+
+    void Render(Screen& screen) override {
+      for (int y = box_.y_min; y <= box_.y_max; ++y) {
+        for (int x = box_.x_min; x <= box_.x_max; ++x) {
+          screen.PixelAt(x, y).italic = true;
+        }
+      }
+      Node::Render(screen);
+    }
+  };
+
+  return std::make_shared<Impl>(std::move(child));
+}
+
+}  // namespace ftxui

src/ftxui/dom/italic_test.cpp

@@ -0,0 +1,22 @@
+// 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 <string>  // for allocator, string
+
+#include "ftxui/dom/elements.hpp"   // for operator|, text, bold, Element
+#include "ftxui/dom/node.hpp"       // for Render
+#include "ftxui/screen/screen.hpp"  // for Screen, Pixel
+#include "gtest/gtest.h"  // for Test, AssertionResult, EXPECT_TRUE, Message, TEST, TestPartResult
+
+// NOLINTBEGIN
+namespace ftxui {
+
+TEST(ItalicTest, Basic) {
+  auto element = text("text") | italic;
+  Screen screen(5, 1);
+  Render(screen, element);
+  EXPECT_TRUE(screen.PixelAt(0, 0).italic);
+}
+
+}  // namespace ftxui
+// NOLINTEND