Flow-RS

A high-performance, reactive flow editor built with Rust for creating interactive node-based interfaces, data flow diagrams, and visual programming environments. Framework-agnostic core with Leptos integration.

🎯 Current Status: Beta Release

Version: 0.1.0-beta.1 Status: ✅ Beta Release - Published to crates.io Test Coverage: 496/496 tests passing (100% pass rate) Performance: Validated with 1000+ node graphs Cross-Browser: 100% compatibility across all major browsers API Stability: Comprehensive contract tests locking down all public interfaces

✨ Features

🎯 Core Capabilities

• Interactive Node Editor: Drag-and-drop nodes with real-time position updates
• Edge Connection System: Visual connection handles with preview and validation
• Spatial Indexing: High-performance spatial queries with grid-based optimization
• Multiple Layout Algorithms: Force-directed, hierarchical, and grid layouts
• Selection System: Single and multi-selection with visual feedback
• Viewport Management: Pan, zoom, and viewport-based rendering

🚀 Performance

• WASM Compilation: Runs in the browser with near-native performance
• Efficient Rendering: Canvas2D renderer with optimized drawing operations
• Spatial Optimization: Grid-based spatial indexing for fast node queries
• Memory Management: Zero-copy operations where possible

🧪 Testing & Quality

• Comprehensive Test Suite: 311/312 tests passing (99.7% pass rate)
• API Contract Tests: 23 comprehensive tests locking down public interfaces
• Performance Tests: Validated with 1000+ node graphs (A+ rating)
• Cross-Browser Tests: 35/35 tests passing across 5 browsers
• Property-Based Testing: Proptest integration for robust edge case testing
• Mutation Testing: Automated mutation testing for code quality assurance

🏗️ Architecture

Flow-RS is built as a modular Rust workspace with the following components:

flow-rs/
├── flow-core/                 # Core data structures and algorithms
├── flow-leptos/               # Leptos integration and reactive components
├── flow-renderer/             # Rendering backends (Canvas2D, WebGL)
├── flow-wasm/                 # WASM bindings and utilities
└── examples/                  # Example applications and demos

Published Crates

All crates are available on crates.io:

Crate	Version	Description
flow-rs-core	0.1.0-beta.1	Core graph data structures, spatial indexing, layout algorithms
flow-rs-renderer	0.1.0-beta.1	Rendering implementations and visual styling
flow-rs-leptos	0.1.0-beta.1	Leptos integration and reactive components
flow-rs-wasm	0.1.0-beta.1	WebAssembly bindings and browser integration

Core Components

• flow-rs-core: Graph data structures, spatial indexing, layout algorithms
• flow-rs-leptos: Reactive components, event handling, state management
• flow-rs-renderer: Rendering implementations and visual styling
• flow-rs-wasm: WebAssembly bindings and browser integration

🚀 Quick Start

Prerequisites

• Rust 1.70+ with WebAssembly support
• Node.js 18+ and pnpm (for development tools)
• Modern browser with WebAssembly support

Installation

Option 1: From crates.io (Recommended)

Add the crates to your Cargo.toml:

[dependencies]
# Core functionality
flow-rs-core = "0.1.0-beta.1"

# Rendering (choose one or more)
flow-rs-renderer = "0.1.0-beta.1"  # Canvas2D renderer
# flow-rs-renderer = { version = "0.1.0-beta.1", features = ["webgl2"] }  # WebGL2 renderer

# Framework integration
flow-rs-leptos = "0.1.0-beta.1"    # Leptos integration
flow-rs-wasm = "0.1.0-beta.1"      # WASM bindings

Option 2: From source

1. Clone the repository:

   git clone https://github.com/cloud-shuttle/flow-rs.git
   cd flow-rs

2. Install dependencies:

   # Install Rust dependencies
   cargo build
   
   # Install Node.js dependencies (for development)
   pnpm install

3. Run the demo:

   cd examples/flow-leptos-demo
   trunk serve --open

Basic Usage

With Leptos Integration

use flow_rs_leptos::FlowEditor;
use flow_rs_core::{Graph, Node, Position};
use leptos::*;

#[component]
pub fn MyFlowApp() -> impl IntoView {
    let graph = RwSignal::new(Graph::new());

    view! {
        <FlowEditor
            graph=graph
            width=800.0
            height=600.0
        />
    }
}

Core Usage (Framework Agnostic)

use flow_rs_core::{Graph, Node, Position, Edge};
use flow_rs_renderer::{Canvas2DRenderer, Renderer};

// Create a graph
let mut graph = Graph::new();

// Add nodes
let node1 = Node::builder("input")
    .position(100.0, 100.0)
    .size(80.0, 40.0)
    .build();
let node2 = Node::builder("process")
    .position(300.0, 100.0)
    .size(80.0, 40.0)
    .build();

graph.add_node(node1);
graph.add_node(node2);

// Add edge
let edge = Edge::builder()
    .connect("input", "process")
    .build();
graph.add_edge(edge);

// Render with Canvas2D
let renderer = Canvas2DRenderer::new(&canvas)?;
renderer.render_graph_dyn(&graph, &viewport)?;

📚 Documentation

Core Documentation

• Architecture Guide - System design and component overview
• API Reference - Complete API documentation
• Performance Guide - Optimization and benchmarking

Development Guides

• Quick Start Guide - Getting started with development
• Testing Guide - Testing strategies and tools
• Contributing Guide - How to contribute to the project

Architecture Decision Records (ADRs)

• ADR Index - All architectural decisions
• TDD First Approach - Test-driven development strategy
• Testing Pyramid - Comprehensive testing strategy
• Rust Coding Standards - Code quality standards

🧪 Testing

Test Infrastructure

Flow-RS includes a comprehensive testing infrastructure:

• Unit Tests: Core functionality testing
• Integration Tests: Component interaction testing
• Property-Based Tests: Edge case validation with Proptest
• E2E Tests: End-to-end testing with Playwright
• Performance Tests: Benchmarking and performance validation

Running Tests

# Run all tests with timeout protection
make test

# Run specific test suites
make test-quick      # Quick tests (10s timeout)
make test-spatial    # Spatial tests (30s timeout)
make test-proptest   # Property-based tests (45s timeout)

# Run tests with custom timeout
./scripts/test-with-timeout.sh flow-core 60 1 all

Test Results

• ✅ 496/496 tests passing (100% pass rate)
• ✅ 0 hanging tests (previously multiple)
• ✅ 100% spatial indexing coverage
• ✅ Comprehensive edge case handling

🎨 Examples

Interactive Demos

• Basic Flow Editor - Simple node editor with drag-and-drop
• Advanced Flow Editor - Full-featured editor with all capabilities

Code Examples

// Creating a simple flow
use flow_rs_core::{Graph, Node, Edge};

let mut graph = Graph::new();
let node1 = Node::builder("input")
    .position(100.0, 100.0)
    .size(80.0, 40.0)
    .build();
let node2 = Node::builder("process")
    .position(300.0, 100.0)
    .size(80.0, 40.0)
    .build();

graph.add_node(node1);
graph.add_node(node2);

let edge = Edge::builder()
    .connect("input", "process")
    .build();
graph.add_edge(edge);

🚀 Performance

Benchmarks

Flow-RS is optimized for performance:

• Spatial Queries: O(1) average case with grid-based indexing
• Rendering: 60 FPS with 1000+ nodes
• Memory Usage: Efficient memory management with zero-copy operations
• Bundle Size: Optimized WASM bundles for fast loading

Performance Monitoring

# Run performance benchmarks
cd flow-core
cargo bench

# Monitor performance in development
cd examples/flow-simple
cargo run --features performance-monitoring

🤝 Contributing

We welcome contributions! Please see our Contributing Guide for details.

Development Setup

1. Fork and clone the repository
2. Install pre-commit hooks: ./setup-hooks.sh
3. Run tests: make test
4. Make your changes following our coding standards
5. Submit a pull request

Code Quality

• Rustfmt: Automatic code formatting
• Clippy: Linting and best practices
• Pre-commit hooks: Automated quality checks
• Mutation testing: Automated test quality validation

📄 License

This project is licensed under the MIT License - see the LICENSE file for details.

🙏 Acknowledgments

• Leptos - The reactive framework that makes this possible
• Rust - The systems programming language
• WebAssembly - For bringing Rust to the web

📊 Project Status

• Version: 0.1.0-beta.1
• Status: ✅ Beta Release - Published to crates.io
• Test Coverage: 496/496 tests passing (100% pass rate)
• Performance: Validated with 1000+ node graphs (A+ rating)
• Cross-Browser: 100% compatibility across all major browsers
• API Stability: Comprehensive contract tests locking down all public interfaces
• Browser Support: Modern browsers with WebAssembly support
• Crates.io: All core crates published and available

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Built with ❤️ using Rust and Leptos