Adds example project using FTXUI (#1044)

Bug:https://github.com/eclipse-ecal/ecal/pull/2095

.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 +1,21 @@
+matrix:
+  platform:
+  - centos7
+  - debian10
+  - ubuntu2004
+  - macos
+  - windows
+  bazel: [6.x, 7.x, 8.x]
+tasks:
+  verify_targets:
+    name: Build and test.
+    platform: ${{ platform }}
+    bazel: ${{ bazel }}
+    build_targets:
+    - '@ftxui//:ftxui'
+    - '@ftxui//:screen'
+    - '@ftxui//:dom'
+    - '@ftxui//:component'
+    test_targets:
+    - '@ftxui//:tests'
+

.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 +1,52 @@
 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.compiler }}, ${{ matrix.os }}"
+    strategy:
+      fail-fast: false
+      matrix:
+        include:
+          - os: ubuntu-latest
+            compiler: gcc
+
+          - os: ubuntu-latest
+            compiler: llvm
+
+          - os: macos-latest
+            compiler: llvm
+
+          - os: macos-latest
+            compiler: gcc
+
+          - os: windows-latest
+            compiler: cl
+
+    runs-on: ${{ matrix.os }}
+    steps:
+      - name: "Checkout repository"
+        uses: actions/checkout@v3
+
+      - name: "Build with Bazel"
+        run: bazel build ...
+
+      - name: "Tests with Bazel"
+        run: bazel run tests
+
+  test_cmake:
+    name: "CMake, ${{ matrix.compiler }}, ${{ matrix.os }}"
     strategy:
       fail-fast: false
       matrix:
@@ -104,7 +139,7 @@ jobs:
           --gcov-executable '${{ matrix.gcov_executable }}';
 
       - name: Windows - Test and coverage
-        if: runner.os == 'Windows' && false
+        if: runner.os == 'Windows'
         working-directory: ./build
         run: >
           OpenCppCoverage.exe
@@ -119,119 +154,3 @@ 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/documentation.yaml

@@ -0,0 +1,60 @@
+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/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/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 +1,251 @@
+# 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", "cpp20")
+load(":bazel/ftxui.bzl", "windows_copts")
+load(":bazel/ftxui.bzl", "pthread_linkopts")
+
+package(default_visibility = ["//visibility:public"])
+
+# A meta target that depends on all the ftxui sub modules.
+alias(
+    name = "ftxui",
+    # Note that :component depends on :dom, which depends on :screen. Bazel
+    # doesn't really support "public" and "private" dependencies. They are all
+    # public. This is equivalent to depending on all the submodules.
+    actual = ":component",
+    visibility = ["//visibility:public"],
+)
+
+# 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",
+    ],
+    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"],
+)
+
+# 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/terminal_input_parser_test_fuzzer.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",
+
+        # 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 = cpp20() + windows_copts(),
+    deps = [
+        "//:ftxui",
+        "@googletest//:gtest_main",
+    ],
+)
+
+generate_examples()

CHANGELOG.md

@@ -1,6 +1,56 @@
 Changelog
 =========
 
+Future release
+------------
+
+### 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
+  If all goes well (pending), it 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 = "6.1.8")
+  ```
+
+  **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)
 -----
 

CMakeLists.txt

@@ -2,7 +2,7 @@ cmake_minimum_required(VERSION 3.12)
 
 project(ftxui
   LANGUAGES CXX
-  VERSION 6.0.1
+  VERSION 6.1.8
   DESCRIPTION "C++ Functional Terminal User Interface."
 )
 

MODULE.bazel

@@ -0,0 +1,9 @@
+# FTXUI Module.
+module(name = "ftxui", version = "6.1.8", compatibility_level = 6)
+
+# Build deps.
+bazel_dep(name = "rules_cc", version = "0.1.1")
+bazel_dep(name = "platforms", version = "0.0.11")
+
+# Test deps.
+bazel_dep(name = "googletest", version = "1.16.0.bcr.1")

README.md

@@ -42,7 +42,7 @@ 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, vcpkg, pkgbuild, conan.
  * Good practices: documentation, tests, fuzzers, performance tests, automated CI, automated packaging, etc...
 
 ## Documentation
@@ -348,6 +348,7 @@ Feel free to add your projects here:
 - [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)
 
@@ -372,7 +373,7 @@ include(FetchContent)
 
 FetchContent_Declare(ftxui
   GIT_REPOSITORY https://github.com/ArthurSonzogni/ftxui
-  GIT_TAG v6.0.1
+  GIT_TAG v6.1.8
 )
 
 FetchContent_GetProperties(ftxui)
@@ -383,6 +384,7 @@ endif()
 ```
 
 If you don't, FTXUI may be used from the following packages:
+- [bazel](...)
 - [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)
@@ -395,8 +397,6 @@ If you choose to build and link FTXUI yourself, `ftxui-component` must be first
 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 +1,115 @@
+# ftxui_common.bzl
+
+load("@rules_cc//cc:defs.bzl", "cc_library")
+
+def cpp17():
+    return select({
+        "@rules_cc//cc/compiler:msvc-cl": ["/std:c++17"],
+        "@rules_cc//cc/compiler:clang-cl": ["/std:c++17"],
+        "@rules_cc//cc/compiler:clang": ["-std=c++17"],
+        "@rules_cc//cc/compiler:gcc": ["-std=c++17"],
+        "//conditions:default": ["-std=c++17"],
+    })
+
+def cpp20():
+    return select({
+        "@rules_cc//cc/compiler:msvc-cl": ["/std:c++20"],
+        "@rules_cc//cc/compiler:clang-cl": ["/std:c++20"],
+        "@rules_cc//cc/compiler:clang": ["-std=c++20"],
+        "@rules_cc//cc/compiler:gcc": ["-std=c++20"],
+        "//conditions:default": ["-std=c++20"],
+    })
+
+# 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 never not updated.
+      #   - 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 = cpp17() + windows_copts(),
+        visibility = ["//visibility:public"],
+    )
+
+# Compile all the examples in the examples/ directory.
+# This is useful to check the Bazel is synchronized with 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", "")
+
+        native.cc_binary(
+            name = name,
+            srcs = [src],
+            deps = ["//:component"],
+            copts = cpp20() + windows_copts(),
+        )

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/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)),

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/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;
     }
 

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
@@ -917,15 +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);
+      dimx = util::clamp(document->requirement().min_x, 0, terminal.dimx);
-      dimy = std::min(document->requirement().min_y, terminal.dimy);
+      dimy = util::clamp(document->requirement().min_y, 0, terminal.dimy);
       break;
   }
 

src/ftxui/dom/dbox.cpp

@@ -45,59 +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->italic = pixel.italic;
-            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/focus.cpp

@@ -36,7 +36,7 @@ Decorator focusPositionRelative(float x, float y) {
 
     void ComputeRequirement() override {
       NodeDecorator::ComputeRequirement();
-      requirement_.focused.enabled = false;
+      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_);

src/ftxui/dom/node.cpp

@@ -125,6 +125,8 @@ void Render(Screen& screen, Node* node, Selection& selection) {
     node->Select(selection);
   }
 
+  if (node->requirement().focused.enabled
+#if defined(FTXUI_MICROSOFT_TERMINAL_FALLBACK)
       // 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].
@@ -136,16 +138,14 @@ void Render(Screen& screen, Node* node, Selection& selection) {
       // https://github.com/ArthurSonzogni/FTXUI/issues/2#issuecomment-505282355
       //
       // Unfortunately, Microsoft terminal do not handle properly hiding the
-  // cursor. Instead the character under the cursor is hidden, which is a big
+      // cursor. Instead the character under the cursor is hidden, which is a
-  // problem. As a result, we can't enable setting cursor to the right
+      // 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 (node->requirement().focused.enabled
+      &&
-#if defined(FTXUI_MICROSOFT_TERMINAL_FALLBACK)
+      node->requirement().focused.cursor_shape != Screen::Cursor::Shape::Hidden
-      ||
-      node->requirement().focused.cursor_shape == Screen::Cursor::Shape::Hidden
 #endif
   ) {
     screen.SetCursor(Screen::Cursor{

src/ftxui/dom/selection_test.cpp

@@ -127,8 +127,6 @@ TEST(SelectionTest, SelectionOnChangeSquashedEvents) {
 }
 
 TEST(SelectionTest, StyleSelection) {
-  int selectionChangeCounter = 0;
-
   auto element = hbox({
       text("Lorem "),
       text("ipsum") | selectionColor(Color::Red),

src/ftxui/dom/size.cpp

@@ -19,7 +19,7 @@ class Size : public Node {
       : Node(unpack(std::move(child))),
         direction_(direction),
         constraint_(constraint),
-        value_(value) {}
+        value_(std::max(0, value)) {}
 
   void ComputeRequirement() override {
     Node::ComputeRequirement();