Edna

Edna is a scratchpad for developers. It's a large persistent text buffer where you can write down anything you like. Works great for that Slack message you don't want to accidentally send, a JSON response from an API you're working with, notes from a meeting, daily to-do list, etc.

The Edna buffer is divided into blocks, and each block can have its own Language set (e.g. JavaScript, JSON, Markdown, etc.). This gives you syntax highlighting and lets you auto-format that JSON response.

Features

Persistent text buffer
Block-based
Syntax highlighting:

C++, C#, Clojure, CSS, Erlang, Go, Groovy, HTML, Java, JavaScript, JSX, Kotlin, TypeScript, TOML, TSX, JSON, Lezer, Markdown, PHP, Python, Ruby, Rust, Shell, SQL, Swift, XML, YAML
Language auto-detection
Auto-formatting
Math/Calculator mode
Currency conversion
Multi-cursor editing
Dark & Light themes
Default or Emacs-like key bindings

Contributions

I'm happy to merge contributions that fit my vision for the app. Bug fixes are always welcome.

Math Blocks

Edna's Math blocks are powered by Math.js expressions. Checkout their documentation to see what syntax, functions, and constants are available.

Accessing the previous result

The variable prev can be used to access the previous result. For example:

128
prev * 2 # 256

Changing how the results of Math blocks are formatted?

You can define a custom format function within the Math block like this:

_format = format # store reference to the built in format
format(x) = _format(x, {notation:"exponential"})

See the Math.js format() function for more info on what's supported.

Default keyboard shortcuts?

On Mac

⌘ + P               Open another note
⌘ + E               Open recent note
⌘ + Enter           Add new block below the current block
⌥ + Enter           Add new block before the current block
⌘ + Shift + Enter   Add new block at the end of the buffer
⌥ + Shift + Enter   Add new block at the start of the buffer
⌘ + ⌥ + Enter      Split the current block at cursor position
⌘ + L               Change block language
⌘ + Down            Goto next block
⌘ + Up              Goto previous block
⌘ + A               Select all text in a note block. Press again to select the whole buffer
⌘ + ⌥ + Up/Down    Add additional cursor above/below
⌥ + Shift + F       Format block content (works for Go, JSON, JavaScript, HTML, CSS and Markdown)
⌥ + Shift + R       Execute block code (works for Go)

On Windows and Linux

Ctrl + P               Open another note
Ctrl + E               Open recent note
Ctrl + Enter           Add new block below the current block
Alt + Enter            Add new block before the current block
Ctrl + Shift + Enter   Add new block at the end of the buffer
Alt + Shift + Enter    Add new block at the start of the buffer
Ctrl + Alt + Enter     Split the current block at cursor position
Ctrl + L               Change block language
Ctrl + Down            Goto next block
Ctrl + Up              Goto previous block
Ctrl + A               Select all text in a note block. Press again to select the whole buffer
Ctrl + Alt + Up/Down   Add additional cursor above/below
Alt + Shift + F        Format block content (works for Go, JSON, JavaScript, HTML, CSS and Markdown)
Alt + Shift + R        Execute block code (works for Go)

Thanks!

Edna is a fork of Heynote with the following differences:

web first (no desktop apps)
multiple notes
access on multiple computers by storing files in DropBox/OneDrive/Google Drive etc. folder

Edna is built upon CodeMirror, Vue, Math.js, Prettier and other great open-source projects.

kjk / edna