ratkit

Core runtime and reusable TUI components for ratatui, the Rust terminal UI library.

Features

Installation

Add the core runtime to your Cargo.toml:

[dependencies]
ratkit = "0.1"

For the full bundle of components:

[dependencies]
ratkit = { version = "0.1", features = ["all"] }

For selected components:

[dependencies]
ratkit = { version = "0.1", default-features = false, features = ["tree-view", "resizable-grid", "toast"] }

Feature Flags

ratkit ships as a core runtime with optional components. By default only the core runtime is enabled; opt in to specific components or use the all feature to pull everything.

ratkit = { version = "0.1", default-features = false, features = ["tree-view", "toast"] }

Quick Start

use ratatui::prelude::*;
use ratkit::{render_markdown, ResizableSplit, SplitDirection, Toast, ToastLevel};
use std::time::Duration;

// Create a resizable split
let split = ResizableSplit::new(SplitDirection::Vertical)
    .ratio(0.3)
    .min_ratio(0.1)
    .max_ratio(0.9);

// Create a toast notification
let toast = Toast::new("File saved successfully!")
    .level(ToastLevel::Success)
    .duration(Duration::from_secs(3));

// Render markdown
let text = render_markdown("# Hello\n\nThis is **bold** and *italic*", None);

Examples

Run examples with:

cargo run --example resizable_split_demo
cargo run --example split_demo --features all
cargo run --example tree_view_demo --features tree
cargo run --example toast_manager_demo --features toast
cargo run --example markdown_demo --features markdown
cargo run --example full_app_demo --features all

Resizable Split

use ratkit::{ResizableSplit, SplitDirection};

let mut split = ResizableSplit::new(SplitDirection::Horizontal)
    .ratio(0.5)
    .min_ratio(0.2)
    .max_ratio(0.8);

// Handle mouse events
if let Some(event) = split.handle_mouse(mouse_event, area) {
    // Split ratio was updated by drag
}

// Render
let [left, right] = split.split(area);
frame.render_widget(left_content, left);
frame.render_widget(right_content, right);

For a multi-pane layout with drag-resize, see examples/split_demo.rs.

Tree View

use ratkit::{TreeNode, TreeView, TreeViewState};

// Build tree structure
let root = TreeNode::new("root", "Root")
    .with_children(vec![
        TreeNode::new("child1", "Child 1"),
        TreeNode::new("child2", "Child 2")
            .with_children(vec![
                TreeNode::new("grandchild", "Grandchild"),
            ]),
    ]);

let mut state = TreeViewState::new(root);
let tree = TreeView::new(&state);

// Handle navigation
state.handle_key(KeyCode::Down); // Move down
state.handle_key(KeyCode::Right); // Expand
state.handle_key(KeyCode::Left); // Collapse

Toast Notifications

use ratkit::{render_toasts, Toast, ToastLevel, ToastManager};
use std::time::Duration;

let mut manager = ToastManager::new()
    .max_toasts(5)
    .default_duration(Duration::from_secs(3));

// Add toasts
manager.push(Toast::info("Information message"));
manager.push(Toast::success("Operation completed!"));
manager.push(Toast::warning("Please check your input"));
manager.push(Toast::error("Something went wrong"));

// Update and render
manager.tick(); // Remove expired toasts
render_toasts(frame, area, &manager);

Markdown Rendering

use ratkit::{
    render_markdown, render_markdown_with_style, render_markdown_interactive,
    MarkdownStyle, MarkdownWidget, MarkdownScrollManager,
};

// Simple rendering
let text = render_markdown("# Title\n\nParagraph with **bold** text.", None);

// Custom styling with syntax highlighting
let style = MarkdownStyle::default();
let text = render_markdown_with_style(markdown_content, &style);

// Interactive widget with scroll management
let mut scroll_manager = MarkdownScrollManager::new();
let widget = MarkdownWidget::new(markdown_content)
    .with_style(style);
frame.render_stateful_widget(widget, area, &mut scroll_manager);

Markdown Features:

• Syntax highlighting for code blocks
• Configurable themes
• Scroll management for long documents
• Expandable/collapsible sections

Terminal Emulator (TermTui)

use ratkit::{TermTui, TermTuiKeyBindings};

// Spawn a terminal with default shell
let shell = std::env::var("SHELL").unwrap_or("/bin/sh".into());
let mut term = TermTui::spawn_with_command("Terminal", &shell, &[])?;

// Handle input
term.handle_key(key_event);
term.handle_mouse(mouse_event, terminal_area);

// Render
term.render(frame, area);

Default Keybindings:

• Ctrl+X - Enter copy mode
• Ctrl+Shift+C - Copy selection

Copy Mode:

• h/j/k/l or arrows - Navigate
• v or Space - Start selection
• y or Enter - Copy and exit
• w/b - Word navigation
• 0/$ - Line start/end
• g/G - Top/bottom
• Esc or q - Exit copy mode

Customizable Keybindings

All interactive components expose their keybindings through configuration structs, allowing full customization:

TermTui

use ratkit::{TermTui, TermTuiKeyBindings};
use crossterm::event::{KeyCode, KeyModifiers, KeyEvent};

// Create custom keybindings
let mut bindings = TermTuiKeyBindings::default();
bindings.enter_copy_mode = KeyEvent::new(KeyCode::Char('b'), KeyModifiers::CONTROL);

let term = TermTui::spawn_with_command("Terminal", "bash", &[])?
    .with_keybindings(bindings);

TreeView

use ratkit::{TreeKeyBindings, TreeNavigator};
use crossterm::event::KeyCode;

let bindings = TreeKeyBindings::new()
    .with_next(vec![KeyCode::Char('n'), KeyCode::Down])
    .with_previous(vec![KeyCode::Char('p'), KeyCode::Up])
    .with_expand(vec![KeyCode::Char('e'), KeyCode::Right])
    .with_collapse(vec![KeyCode::Char('c'), KeyCode::Left]);

let navigator = TreeNavigator::with_keybindings(bindings);

Available Keybinding Configs

Architecture

All components follow ratatui's Widget and StatefulWidget patterns:

// Stateless widget
impl Widget for MyComponent {
    fn render(self, area: Rect, buf: &mut Buffer) { ... }
}

// Stateful widget
impl StatefulWidget for MyComponent {
    type State = MyComponentState;
    fn render(self, area: Rect, buf: &mut Buffer, state: &mut Self::State) { ... }
}

Mouse Support

Components support mouse interaction through a consistent API:

// Handle mouse events
if let Some(action) = component.handle_mouse(mouse_event, area) {
    match action {
        ComponentAction::Clicked => { ... }
        ComponentAction::Dragged { delta } => { ... }
    }
}

Comparison with Alternatives

Contributing

Contributions are welcome! Please feel free to submit a Pull Request.

1. Fork the repository
2. Create your feature branch (git checkout -b feature/amazing-feature)
3. Commit your changes (git commit -m 'Add amazing feature')
4. Push to the branch (git push origin feature/amazing-feature)
5. Open a Pull Request

License

Licensed under the MIT license (LICENSE-MIT or http://opensource.org/licenses/MIT).