Pronounced as [flʊs]

Fluss is experimental editor that tries to implement modular and extensible system development environment. Mainly backend is based on Skia, and it is also possible to add piet backend.

• Multicursor editing
• Scrollbar
• Copy, paste, Input Method Editor
• Source file AST
  • mainly based on TreeSitter, it's possible to use Lady Deirdre
• AST-based navigation
• Source code highlighting
  • Multithreaded, based on AST
• LSP
  • Multithreaded
  • Uses separated widgets to display information

• Tabbing system

• Editor space splitter (vertical and horizontal)

• Abstract tab type (to implement markdown & html preview, settings and extension manager)

• Left, bottom, right docks for tools

• Toolbar with buttons and bottom bar with text widgets, tooltips are required

• Top-level windows (hovering, completion, toltips)

• Hard-coded plug-in system

  • On every plug-in update it's required to recompile editor
  • The most easy and simple system

• Runtime plug-in system

  • Deno, wasm or special scripting language required
  • Declarative GUI framework required

• Declarative GUI framework

  • Must be standalone project
  • Must be pluggable into editor pane
  • Backend is based on kurbo types
  • kurbo will be used as geometry types provider
  • winit is used as an example of event system for GUI widgets. To find the event destination, focus system (for keyboard) and cascade search (for mouse) will be used
  • Should be identical to RUI/SwiftUI. Main widgets list will be based on SwiftUI widget's purpose and appearance list

• Source code editor
  • Focus on JetBrains IntelliJ editor's identity
  • Uses only monospace fonts
• Terminal
  • Based on VTE protocol
  • Uses only monospace fonts
• File explorer
  • Uses any font
  • Appearance must be completely customizable
  • Planned:
    1. Creation and renaming files and folders
    2. drag'n'drop for files and folders, main example is VSCode
    3. Code check and formatting in files and folders

Language support priorities are Rust, C and C++. On the second place are TypeScript, Python, C#, Java and Kotlin. After implementing the main features of the editor, it is possible to support any language that has a server that supports LSP, and an implementation of the TreeSitter parser.

Don't look at this project as a product until all these points are completed.