A flexible text editor written in Elm

Check out the demo

Note:

• This project is not published yet on package.elm-lang.org
• I would not consider this project ready for use in production, since it's missing major features like scrolling and line wrap

This library implements an editor (duh) and a buffer. The buffer is separate from the editor to allow multiple editors to use the same buffer, such as in a multi-panel text editor.

Note: There's a checkmark next to implemented features

• file content
• save status
• syntax highlighting (cached)
• decorations (eg underlines, tooltips, gutter icons)

The buffer implementation has helper functions for manipulating its content, like finding the end of a word.

• cursor location
• selection
• rendering to the DOM
• UI interaction (mouse and keyboard)
• undo history
• scroll position
• auto-complete dialog
• open decorations (in other words, decorations exist in the buffer but each editor tracks open decorations)
• line wrap

I hope that one day this project will be comparable to Ace and CodeMirror, but Ace and CodeMirror have had quite a head start (about 7 years!).

The editor behavior and keyboard shortcuts are based on Atom (because that's the editor I'm most familiar with).

Ace and CodeMirror are text editors designed to work in a web browser. They're both written in JavaScript, so integration with Elm is pretty meh.

Janiczek recently demonstrated a text editor in pure elm, which implements work-arounds for several issues I had faced in the past when creating a pure elm editor.

I hope this inspires somebody to try some stuff in Elm they’ve been needing but seemed too big / hard for them! You might, like me with this project, find out it’s in your reach - no doubt thanks to Elm
- Janiczek