LeXtudio.UnoEdit

UnoEdit

UnoEdit is a desktop-first port of AvalonEdit to Uno Platform and WinUI 3.

Current scope:

• Target Uno Skia Desktop (WinUI 3 port is included but not the primary focus).
• Do not target mobile during the bootstrap phase (v0.x.x).
• Port the document model and editor core as well as the Uno control shell.

Supported Platforms

• Windows 11 (Windows 10 may work but is not a primary target)
• macOS, 3 most recent versions from 2023-2025
• Ubuntu latest LTS (other Linux distributions may work but are not primary targets)

If you are looking for support of a specific platform, business sponsorship is the way to accelerate that work. Please reach out to us at homepage.

Get Started

The main deliverable is a few NuGet packages:

• The core editor component, including document model, editing engine, and platform-agnostic UI logic.
• Optional TextMate integration library built on top of UnoEdit.
• The core text rendering and layout engine, shared across UnoEdit and potentially other text-based controls.

Clone this repo and check out the sample projects to see how to use UnoEdit in your own applications (Uno Platform and WinUI 3).

Current Status

• Public API parity against AvalonEdit currently measures 193/193 types and 1296/1296 members.
• Behavioral parity is tracked separately with the local parity detector. The latest stub-aware pass reports 0 suspected stubs.
• The shared regression suite currently passes 281/281.

TODO Items Before v1.0.0

• Right-to-left text support
• IME support improvements (currently functional but not fully polished)
• Accessibility support (screen readers, keyboard navigation, etc.)
• Performance optimizations for large documents (virtualization, incremental layout, etc.)
• TextMate integration (functional but needs heavy polishing)

Credits & Third-Party

UnoEdit builds on and includes code from the AvalonEdit project (ICSharpCode.AvalonEdit). AvalonEdit is licensed under the MIT License. See avalonedit/LICENSE and THIRD_PARTY_NOTICES.md for attribution and full license text. The NuGet packages produced by this repository also include the third-party license text and notices.