The color bold, in ansi.
This module provides basic ANSI color code support, to allow you to format your console output with foreground and background colors as well as providing bold, italic and underline support.
The color gray, in ansi.
An elegant lib that converts the chalked (ANSI) text to HTML. (Community)
The color red, in ansi.
The color cyan, in ansi.
Strip ANSI escape codes from a string
An elegant lib that converts the chalked (ANSI) text to HTML.
Library to easily style texts with string formatting
The color italic, in ansi.
The color green, in ansi.
The color bgblue, in ansi.
The color bgyellow, in ansi.
Wordwrap a string with ANSI escape codes
The color blue, in ansi.
The color bgcyan, in ansi.
The color hidden, in ansi.
The color underline, in ansi.
The color bggreen, in ansi.
The color dim, in ansi.
The color yellow, in ansi.
Easily add ANSI colors to your text and symbols in the terminal. A faster drop-in replacement for chalk, kleur and turbocolor (without the dependencies and rendering bugs).
A small library to print colourful messages.
The color white, in ansi.
A Ruby library for terminal text styling with ANSI colors and effects. Provides an elegant, functional API with immutable style objects that can be composed using the >> operator. Supports standard colors, hex values, and comprehensive text effects including bold, faint, italic, underline, overline, blink, inverse, and concealed text. Features type-safe argument validation using dry-schema and dry-types.
tans-parser parses raw terminal output with ANSI escape sequences into a structured grid representation with per-cell attributes (char, fg, bg, bold, italic, underline, blink). Includes a query API (State) for text search, color inspection, and AI-friendly JSON output.
== Terminal UIs, the Ruby Way RatatuiRuby[https://rubygems.org/gems/ratatui_ruby] is a RubyGem built on Ratatui[https://ratatui.rs], a leading TUI library written in Rust[https://rust-lang.org]. You get native performance with the joy of Ruby. gem install ratatui_ruby {rdoc-image:https://ratatui-ruby.dev/hero.gif}[https://www.ratatui-ruby.dev/docs/v0.10/examples/app_cli_rich_moments/README_md.html] === Rich Moments Add a spinner, a progress bar, or an inline menu to your CLI script. No full-screen takeover. Your terminal history stays intact. ==== Inline Viewports Standard TUIs erase themselves on exit. Your carefully formatted CLI output disappears. Users lose their scrollback. <b>Inline viewports</b> solve this. They occupy a fixed number of lines, render rich UI, then leave the output in place when done. Perfect for spinners, menus, progress indicators—any brief moment of richness. require "ratatui_ruby" RatatuiRuby.run(viewport: :inline, height: 1) do |tui| until connected? status = tui.paragraph(text: "\#{spin} Connecting...") tui.draw { |frame| frame.render_widget(status, frame.area) } end end === Build Something Real Full-screen applications with {keyboard and mouse input}[https://www.ratatui-ruby.dev/docs/v0.10/examples/app_all_events/README_md.html]. The managed loop sets up the terminal and restores it on exit, even after crashes. RatatuiRuby.run do |tui| loop do tui.draw do |frame| frame.render_widget( tui.paragraph(text: "Hello, RatatuiRuby!", alignment: :center), frame.area ) end case tui.poll_event in { type: :key, code: "q" } then break else nil end end end ==== Widgets included: [Layout] {Block}[https://www.ratatui-ruby.dev/docs/v0.10/examples/widget_block/README_md.html], {Center}[https://www.ratatui-ruby.dev/docs/v0.10/examples/widget_center/README_md.html], {Clear (Popup, Modal)}[https://www.ratatui-ruby.dev/docs/v0.10/examples/widget_popup/README_md.html], {Layout (Split, Grid)}[https://www.ratatui-ruby.dev/docs/v0.10/examples/widget_layout_split/README_md.html], {Overlay}[https://www.ratatui-ruby.dev/docs/v0.10/examples/widget_overlay/README_md.html] [Data] {Bar Chart}[https://www.ratatui-ruby.dev/docs/v0.10/examples/widget_barchart/README_md.html], {Chart}[https://www.ratatui-ruby.dev/docs/v0.10/examples/widget_chart/README_md.html], {Gauge}[https://www.ratatui-ruby.dev/docs/v0.10/examples/widget_gauge/README_md.html], {Line Gauge}[https://www.ratatui-ruby.dev/docs/v0.10/examples/widget_line_gauge/README_md.html], {Sparkline}[https://www.ratatui-ruby.dev/docs/v0.10/examples/widget_sparkline/README_md.html], {Table}[https://www.ratatui-ruby.dev/docs/v0.10/examples/widget_table/README_md.html] [Text] {Cell}[https://www.ratatui-ruby.dev/docs/v0.10/examples/widget_cell/README_md.html], {List}[https://www.ratatui-ruby.dev/docs/v0.10/examples/widget_list/README_md.html], {Rich Text (Line, Span)}[https://www.ratatui-ruby.dev/docs/v0.10/examples/widget_rich_text/README_md.html], {Scrollbar (Scroll)}[https://www.ratatui-ruby.dev/docs/v0.10/examples/widget_scrollbar/README_md.html], {Tabs}[https://www.ratatui-ruby.dev/docs/v0.10/examples/widget_tabs/README_md.html] [Graphics] {Calendar}[https://www.ratatui-ruby.dev/docs/v0.10/examples/widget_calendar/README_md.html], {Canvas}[https://www.ratatui-ruby.dev/docs/v0.10/examples/widget_canvas/README_md.html], {Map (World Map)}[https://www.ratatui-ruby.dev/docs/v0.10/examples/widget_map/README_md.html] Need something else? {Build custom widgets}[https://www.ratatui-ruby.dev/docs/v0.10/doc/concepts/custom_widgets_md.html] in Ruby! --- === Testing Built In TUI testing is tedious. You need a headless terminal, event injection, snapshot comparisons, and style assertions. RatatuiRuby bundles all of it. require "ratatui_ruby/test_helper" class TestColorPicker < Minitest::Test include RatatuiRuby::TestHelper def test_swatch_widget with_test_terminal(10, 3) do RatatuiRuby.draw do |frame| frame.render_widget(Swatch.new(:red), frame.area) end assert_cell_style 2, 1, char: "█", bg: :red end end end ==== What's inside: - <b>Headless terminal</b> — No real TTY needed - <b>Snapshots</b> — Plain text and rich (ANSI colors) - <b>Event injection</b> — Keys, mouse, paste, resize - <b>Style assertions</b> — Color, bold, underline at any cell - <b>Test doubles</b> — Mock frames and stub rects - <b>UPDATE_SNAPSHOTS=1</b> — Regenerate baselines in one command --- ==== Inline Menu Example require "ratatui_ruby" # This example renders an inline menu. Arrow keys select, enter confirms. # The menu appears in-place, preserving scrollback. When the user chooses, # the TUI closes and the script continues with the selected value. class RadioMenu CHOICES = ["Production", "Staging", "Development"] # ASCII strings are universally supported. PREFIXES = { active: "●", inactive: "○" } # Some terminals may not support Unicode. CONTROLS = "↑/↓: Select | Enter: Choose | Ctrl+C: Cancel" # Let users know what keys you handle. TITLES = ["Select Environment", # The default title position is top left. { content: CONTROLS, # Multiple titles can save space. position: :bottom, # Titles go on the top or bottom, alignment: :right }] # aligned left, right, or center def call # This method blocks until a choice is made. RatatuiRuby.run(viewport: :inline, height: 5) do |tui| # RatauiRuby.run manages the terminal. @tui = tui # The TUI instance is safe to store. show_menu until chosen? # You can use any loop keyword you like. end # `run` won't return until your block does, RadioMenu::CHOICES[@choice] # so you can use it synchronously. end # Classes like RadioMenu are convenient for private # CLI authors to offer "rich moments." def show_menu = @tui.draw do |frame| # RatatuiRuby gives you low-level access. widget = @tui.paragraph( # But the TUI facade makes it easy to use. text: menu_items, # Text can be spans, lines, or paragraphs. block: @tui.block(borders: :all, titles: TITLES) # Blocks give you boxes and titles, and hold ) # one or more widgets. We only use one here, frame.render_widget(widget, frame.area) # but "area" lets you compose sub-views. end def chosen? # You are responsible for handling input. interaction = @tui.poll_event # Every frame, you receive an event object: return choose if interaction.enter? # Key, Mouse, Resize, Paste, FocusGained, # FocusLost, or None objects. They come with move_by(-1) if interaction.up? # predicates, support pattern matching, and move_by(1) if interaction.down? # can be inspected for properties directly. quit! if interaction.ctrl_c? # Your application must handle every input, false # even interrupts and other exit patterns. end def choose # Here, the loop is about to exit, and the prepare_next_line # block will return. The inline viewport @choice # will be torn down and the terminal will end # be restored, but you are responsible for # positioning the cursor. def prepare_next_line # To ensure the next output is on a new area = @tui.viewport_area # line, query the viewport area and move RatatuiRuby.cursor_position = [0, area.y + area.height] # the cursor to the start of the last line. puts # Then print a newline. end def quit! # All of your familiar Ruby control flow prepare_next_line # keywords work as expected, so we can exit 0 # use them to leave the TUI. end def move_by(line_count) # You are in full control of your UX, so @choice = (@choice + line_count) % CHOICES.size # you can implement any logic you need: end # Would you "wrap around" here, or not? # def menu_items = CHOICES.map.with_index do |choice, i| # Notably, RatatuiRuby has no concept of "\#{prefix_for(i)} \#{choice}" # "menus" or "radio buttons". You are in end # full control, but it also means you must def prefix_for(choice_index) # implement the logic yourself. For larger return PREFIXES[:active] if choice_index == @choice # applications, consider using Rooibos, PREFIXES[:inactive] # an MVU framework built with RatatuiRuby. end # Or, use the upcoming ratatui-ruby-kit, # our object-oriented component library. def initialize = @choice = 0 # However, those are both optional, and end # designed for full-screen Terminal UIs. # RatatuiRuby will always give you the most choice = RadioMenu.new.call # control, and is enough for "rich CLI puts "You chose \#{choice}!" # moments" like this one. --- === Full App Solutions RatatuiRuby renders. For complex applications, add a framework that manages state and composition. ==== Rooibos[https://www.rooibos.run] (Framework) Model-View-Update architecture. Inspired by Elm, Bubble Tea, and React + Redux. Your UI is a pure function of state. - Functional programming with MVU - Commands work off the main thread - Messages, not callbacks, drive updates ==== {Kit}[https://sr.ht/~kerrick/ratatui_ruby/#chapter-3-the-object-path--kit] (Coming Soon) Component-based architecture. Encapsulate state, input handling, and rendering in reusable pieces. - OOP with stateful components - Separate UI state from domain logic - Built-in focus management & click handling Both use the same widget library and rendering engine. Pick the paradigm that fits your brain. --- === Why RatatuiRuby? Ruby deserves world-class terminal user interfaces. TUI developers deserve a world-class language. RatatuiRuby wraps Rust's Ratatui via native extension. The Rust library handles rendering. Your Ruby code handles design. >>> "Text UIs are seeing a renaissance with many new TUI libraries popping up. The Ratatui bindings have proven to be full featured and stable." — {Mike Perham}[https://www.mikeperham.com/], creator of Sidekiq[https://sidekiq.org/] and Faktory[https://contribsys.com/faktory/] ==== Why Rust? Why Ruby? Rust excels at low-level rendering. Ruby excels at expressing domain logic and UI. RatatuiRuby puts each language where it performs best. ==== Versus CharmRuby CharmRuby[https://charm-ruby.dev/] wraps Charm's Go libraries. Both projects give Ruby developers TUI options. [Integration] CharmRuby: Two runtimes, one process. RatatuiRuby: Native extension in Rust. [Runtime] CharmRuby: Go + Ruby (competing). RatatuiRuby: Ruby (Rust has no runtime). [Memory] CharmRuby: Two uncoordinated GCs. RatatuiRuby: One Garbage Collector. [Style] CharmRuby: The Elm Architecture (TEA). RatatuiRuby: TEA, OOP, or Imperative. --- === Links [Get Started] {Quickstart}[https://www.ratatui-ruby.dev/docs/v0.10/doc/getting_started/quickstart_md.html], {Examples}[https://www.ratatui-ruby.dev/docs/v0.10/examples/app_cli_rich_moments/README_md.html], {API Reference}[https://www.ratatui-ruby.dev/docs/v0.10/], {Guides}[https://www.ratatui-ruby.dev/docs/v0.10/doc/index_md.html] [Ecosystem] Rooibos[https://www.rooibos.run], {Kit}[https://sr.ht/~kerrick/ratatui_ruby/#chapter-3-the-object-path--kit] (Planned), {Framework}[https://sr.ht/~kerrick/ratatui_ruby/#chapter-5-the-framework] (Planned), {UI Widgets}[https://sr.ht/~kerrick/ratatui_ruby/#chapter-6-licensing] (Planned) [Community] {Forum}[https://forum.setdef.com/c/ratatui-ruby/6], {Announcements}[https://forum.setdef.com/tags/c/ratatui-ruby/6/announcement], {Discussion}[https://forum.setdef.com/tags/c/ratatui-ruby/6/discussion], {Bug Tracker}[https://forum.setdef.com/tags/c/ratatui-ruby/6/bug] [Contribute] {Contributing Guide}[https://man.sr.ht/~kerrick/ratatui_ruby/contributing.md], {Code of Conduct}[https://man.sr.ht/~kerrick/ratatui_ruby/code_of_conduct.md], {Project History}[https://man.sr.ht/~kerrick/ratatui_ruby/history/index.md], {Pull Requests}[https://forum.setdef.com/tags/c/ratatui-ruby/6/patch] --- [Website] https://www.ratatui-ruby.dev [Source] https://github.com/setdef/RatatuiRuby [RubyGems] https://rubygems.org/gems/ratatui_ruby [Upstream] https://ratatui.rs [Build Status] https://builds.sr.ht/~kerrick/ratatui_ruby © 2026 Kerrick Long · Library: LGPL-3.0-or-later · Website: CC-BY-NC-ND-4.0 · Snippets: MIT-0
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