Merge 2a5d7646da into 07fd3e685a

BUG:https://github.com/ArthurSonzogni/FTXUI/issues/1032

.bazelrc

@@ -1,7 +0,0 @@
-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/config.yaml

@@ -0,0 +1,18 @@
+# Copyright 2025 Arthur Sonzogni. All rights reserved.
+# Use of this source code is governed by the MIT license that can be found in
+# the LICENSE file.
+{
+  "homepage": "https://github.com/ArthurSonzogni/FTXUI",
+  "maintainers": [
+    {
+      "name": "Arthur Sonzogni",
+      "email": "sonzogniarthur@gmail.com",
+      "github": "ArthurSonzogni"
+    }
+  ],
+  "repository": [
+    "github:ArthurSonzogni/FTXUI"
+  ],
+  "versions": [],
+  "yanked_versions": {}
+}

.bcr/presubmit.yml

@@ -1,36 +1,25 @@
+# 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.
+bcr_test_module:
+  module_path: "."
   matrix:
-  bazel:
-    - 7.x
-    - 8.x
-    - rolling
-  unix_platform:
-    - debian11
-    - ubuntu2204
-    - macos
-    - macos_arm64
-  win_platform:
-    - windows
-
+    platform: [
+      "debian11",
+      "macos",
+      "macos-arm64",
+      "ubuntu2204",
+      "windows",
+    ]
+    bazel: [
+      6.x,
+      7.x,
+      8.x,
+    ]
   tasks:
-
-  unix_test:
-    name: Verify build targets on Unix
-    platform: ${{ unix_platform }}
+    run_tests:
+      name: "Run test module"
+      platform: ${{ 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'
+      test_targets:
+        - "//..."

.bcr/source.template.json

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

.github/workflows/build.yaml

@@ -1,12 +1,10 @@
 name: Build
 
 on:
-  # On new commits to main:
+  create:
   push:
     branches:
       - main
-
-  # On pull requests:
   pull_request:
     branches:
       - main
@@ -14,30 +12,25 @@ on:
 jobs:
 
   test_bazel:
-    name: "Bazel, ${{ matrix.cxx }}, ${{ matrix.os }}"
+    name: "Test Bazel"
     strategy:
       fail-fast: false
       matrix:
         include:
           - os: ubuntu-latest
-            cxx: g++
-            cc: gcc
+            compiler: gcc
 
           - os: ubuntu-latest
-            cxx: clang++
-            cc: clang
+            compiler: llvm
 
           - os: macos-latest
-            cxx: g++
-            cc: gcc
+            compiler: llvm
 
           - os: macos-latest
-            cxx: clang++
-            cc: clang
+            compiler: gcc
 
           - os: windows-latest
-            cxx: cl
-            cc: cl
+            compiler: cl
 
     runs-on: ${{ matrix.os }}
     steps:
@@ -45,19 +38,13 @@ jobs:
         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 ...
+        run: bazel run tests
 
   test_cmake:
-    name: "CMake, ${{ matrix.compiler }}, ${{ matrix.os }}"
+    name: "Tests CMake"
     strategy:
       fail-fast: false
       matrix:
@@ -165,3 +152,121 @@ jobs:
           flags: ${{ runner.os }}
           name: ${{ runner.os }}-coverage
           files: ./build/coverage.xml
+
+  # Create a release on new v* tags
+  release:
+    needs:
+      - test_cmake
+      - test_bazel
+    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

@@ -1,60 +0,0 @@
-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

@@ -1,24 +0,0 @@
-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/publish_to_bcr.yaml

@@ -0,0 +1,28 @@
+on:
+  # Run the publish workflow after a successful release.
+  workflow_call:
+    inputs:
+      tag_name:
+        required: true
+        type: string
+
+  # Allow manual triggering of the workflow.
+  workflow_dispatch:
+    inputs:
+      tag_name:
+        required: true
+        type: string
+
+jobs:    
+  publish:
+    uses: bazel-contrib/publish-to-bcr/.github/workflows/publish.yaml@[version]
+    with:
+      tag_name: ${{ inputs.tag_name }}
+      # GitHub repository which is a fork of the upstream where the Pull Request will be opened.
+      registry_fork: ArthurSonzogni/bazel-central-registry
+    permissions:
+      attestations: write
+      contents: write
+      id-token: write
+    secrets:
+      publish_token: ${{ secrets.PUBLISH_TOKEN }}

.github/workflows/release.yaml

@@ -1,100 +0,0 @@
-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

BUILD.bazel

@@ -3,28 +3,36 @@
 # the LICENSE file.
 
 # TODO:
-# - Build benchmark.
-# - Build fuzzers.
-# - Build documentation.
+# - Windows/MSVC support.
+#   - Pass /utf-8 to MSVC users depending on FTXUI.
+#   - Pass "FTXUI_MICROSOFT_TERMINAL_FALLBACK" to windows users.
+# - Support building benchmark.
+# - Support building examples.
+# - Support building fuzzer.
+# - Support building 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", "cpp20")
+load(":bazel/ftxui.bzl", "msvc_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")
+package(default_visibility = ["//visibility:public"])
 
-# @ftxui:screen is a module that provides a screen buffer and color management
+# 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.
@@ -56,7 +64,7 @@ ftxui_cc_library(
     ],
 )
 
-# @ftxui:dom is a library that provides a way to create and manipulate a
+# 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
@@ -126,7 +134,7 @@ ftxui_cc_library(
     deps = [":screen"],
 )
 
-# @ftxui:component is a library to create "dynamic" component renderering and
+# 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.
 #
@@ -163,13 +171,6 @@ ftxui_cc_library(
         "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",
@@ -185,10 +186,7 @@ ftxui_cc_library(
         "include/ftxui/component/task.hpp",
     ],
     linkopts = pthread_linkopts(),
-    deps = [
-        ":dom",
-        ":screen",
-    ],
+    deps = [":dom"],
 )
 
 # FTXUI's tests
@@ -211,6 +209,7 @@ cc_test(
         "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",
@@ -238,17 +237,6 @@ cc_test(
         "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",
@@ -257,12 +245,9 @@ cc_test(
         "include",
         "src",
     ],
-    copts = windows_copts(),
+    copts = cpp20() + msvc_copts(),
     deps = [
-        ":screen",
-        ":dom",
-        ":component",
-        "@googletest//:gtest",
+        "//:ftxui",
         "@googletest//:gtest_main",
     ],
 )

CHANGELOG.md

@@ -1,43 +1,11 @@
 Changelog
 =========
 
-6.1.9 (2025-05-07)
-------------
+Next release (2025-04-01)
+-------------------------
 
 ### 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",
-  ]
-  ```
+- Feature: Support `bazel`. See #1032. Proposed by @kcc.
 
 ### Component
 - Bugfix: Fix a crash with ResizeableSplit. See #1023.

CMakeLists.txt

@@ -2,7 +2,7 @@ cmake_minimum_required(VERSION 3.12)
 
 project(ftxui
   LANGUAGES CXX
-  VERSION 6.1.9
+  VERSION 6.0.2
   DESCRIPTION "C++ Functional Terminal User Interface."
 )
 

MODULE.bazel

@@ -1,13 +1,13 @@
-# FTXUI module.
-module(
-    name = "ftxui",
-    version = "6.1.9",
-    compatibility_level = 6,
-)
+# 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.
 
-# Build dependencies.
+# FTXUI Module.
+module(name = "ftxui", version = "6.0.3")
+
+# Build deps.
 bazel_dep(name = "rules_cc", version = "0.1.1")
-bazel_dep(name = "platforms", version = "0.0.10")
+bazel_dep(name = "platforms", version = "0.0.11")
 
-# Test dependencies.
-bazel_dep(name = "googletest", version = "1.14.0.bcr.1", dev_dependency = True)
+# Test deps.
+bazel_dep(name = "googletest", version = "1.16.0.bcr.1")

README.md

@@ -348,7 +348,6 @@ 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)
 
@@ -373,7 +372,7 @@ include(FetchContent)
 
 FetchContent_Declare(ftxui
   GIT_REPOSITORY https://github.com/ArthurSonzogni/ftxui
-  GIT_TAG v6.1.9
+  GIT_TAG v6.0.2
 )
 
 FetchContent_GetProperties(ftxui)

bazel/ftxui.bzl

@@ -1,45 +1,42 @@
 # 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():
+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"],
+    })
+
+def msvc_copts():
     MSVC_COPTS = [
-      # Microsoft Visual Studio must decode sources files as UTF-8.
+      # Force Microsoft Visual Studio to decode sources files in UTF-8.
       "/utf-8",
 
-      # Microsoft Visual Studio must interpret the codepoint using unicode.
+      # Force Microsoft Visual Studio to interpret the source files as
+      # 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": [],
     })
 
@@ -55,8 +52,8 @@ def pthread_linkopts():
 
 def ftxui_cc_library(
         name,
-        srcs = [],
-        hdrs = [],
+        srcs,
+        hdrs,
         linkopts = [],
         deps = []):
 
@@ -72,13 +69,10 @@ def ftxui_cc_library(
             "include",
             "src",
         ],
-        copts = windows_copts(),
+        copts = cpp17() + msvc_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"])
 
@@ -92,13 +86,9 @@ def generate_examples():
         # Turn "examples/component/button.cpp" → "example_component_button"
         name = src.replace("/", "_").replace(".cpp", "")
 
-        cc_binary(
+        native.cc_binary(
             name = name,
             srcs = [src],
-            deps = [
-              ":component",
-              ":dom",
-              ":screen",
-            ],
-            copts = windows_copts(),
+            deps = ["//:component"],
+            copts = cpp20() + msvc_copts(),
         )

src/ftxui/dom/dbox.cpp

@@ -45,6 +45,59 @@ 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
 

tools/test_bazel.sh

@@ -1,18 +0,0 @@
-# This script tests the project with different versions of Bazel and compilers
-# locally. This avoids waiting on the CI to run the tests.
-
-for ver in \
-  "6.0.0" \
-  "7.0.0" \
-  "8.0.0"
-do
-  for cc in \
-    "gcc" \
-    "clang"
-    do
-      echo "=== Testing with Bazel ${ver} with ${cc} ==="
-      USE_BAZEL_VERSION=${ver} CC=${cc} bazel clean --expunge
-      USE_BAZEL_VERSION=${ver} CC=${cc} bazel build //...
-      USE_BAZEL_VERSION=${ver} CC=${cc} bazel test //...
-    done
-  done