casparwylie/cascii-core: A web-based ASCII and Unicode diagram builder written in vanilla Javascript

Cascii is a web-based ASCII and Unicode diagram builder written in vanilla Javascript.

It has zero dependencies on any servers, web packing, libraries, and is no-markup and no-stylesheets. You can start building diagrams by simply opening the cascii.html file in a browser. Cascii is also hosted at cascii.app where you can get short links to your diagrams, open an account, etc.

Here is a diagram built with Cascii that loosely explains how Cascii is structured internally:

                                   ┌╶╶╶╶╶╶╶╶╶╶╶╶╶╶┐
                                   ╷ GroupManager ╷
                                   └╶╶╶╶╶╶╶╶╶╶╶╶╶╶┘
               ┌─────────────┐    /                  ┌─────────────┐
               │EventManager │   /           ┌───────│SquareLayer  │
               └─────────────┘  /            │       │─────────────│        ┌───────────────┐
                      \        /             │───────│CircleLayer  │   ┌────│SwitchLineLayer│
                       \      /              │       │─────────────│   │    │───────────────│
                        ┏━━━━━━━━━━━━┓       │───────│BaseLineLayer│◀──┐────│FreeLineLayer  │
                        ┃LayerManager┃◀──────┘       │─────────────│   │    │───────────────│
                        ┗━━━━━━━━━━━━┛       │───────│DiamondLayer │   └────│StepLineLayer  │
        ┌────────────┐ /      /       \      │       │─────────────│        └───────────────┘
        │CharManager │/      /         \     │───────│FreeLayer    │
        └────────────┘      /           \    │       │─────────────│
                           /             \   └───────│TableLayer   │
                     ┌────────────┐       \          └─────────────┘            Pixels!
                     │ ModeMaster │        •
                     └────────────┘      •   •                                     ▲
                                       •       •                                   │
                                     •           •                                 │
                                   •   CanvasCom   ────────────────────────────────┘
                                     •           •
                                       •       •
                                         •   •
                                           •
Edit/view: https://cascii.app/7c24a

Simply download and open the cascii.html file!

…Literally…

curl https://cascii.app -o cascii.html && open cascii.html

…Or…

If you are not making changes, it’s recommended to use cascii.app
directly so you can take advantage of short links and save your work. Locally, short links will not appear in your exports.

• Basic drawing
• Selection (area selection, multi-selection, resize, move)
• Joints
• Grouping
• Ordering
• Duplicating
• Dynamic tables
• Free draw / erase
• Auto save (browser local storage)
• Paste / import text
• Layers: Free, Switch Lines, Steps Lines, Free Lines, Square, Circle, Diamond, Text, Table
• History (undo/redo)
• Line styling
• ASCII and Unicode

• ctrl-g Group
• ctrl-c Copy layer
• ctrl-z Undo
• ctrl-shift-z Redo
• ctrl-a Select all
• backspace/delete Delete layer
• shift-click Multi-select | single-select member of group
• arrow keys Move layer
• ctrl-v Paste text (when editing text), or paste as a layer in any other mode

Contributions are very welcomed. Please feel free to submit proposals directly in the form of a PR or Issue.

Licensed under the Apache License, Version 2.0

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