Extensible mechanics for operational transformation in Rust that are generic with respect to their value (not constrained to text), wire-compatible with Quill and fully fuzzed.

Operational Transformation (OT) enables real-time collaborative editing by enabling two (or more) users to make changes at the same time. An OT-capable central server transforms and broadcasts these changes so everyone is looking at the same synchronized state, even in the presence of severe latency.

This library can be integrated to build both a client-side and/or server-side implementation of operational transformation within your application.

use kyte::{Compose, Delta, Transform};

let before = Delta::new().insert("Hello World".to_owned(), ());

let alice = Delta::new().retain(5, ()).insert(",".to_owned(), ());
let bob = Delta::new().retain(11, ()).insert("!".to_owned(), ());

assert_eq!(
    before
        .compose(alice)
        .compose(alice.transform(bob, true)),
    before
        .compose(bob)
        .compose(bob.transform(alice, false)),
)

This library largely implements Quill's delta spec and uses some of their test cases for unit testing. Simply put, this library wouldn't exist without their amazing work on Quill.

Copyright 2023 Glacyr B.V.

Permission is hereby granted, free of charge, to any person obtaining a copy of this software and associated documentation files (the "Software"), to deal in the Software without restriction, including without limitation the rights to use, copy, modify, merge, publish, distribute, sublicense, and/or sell copies of the Software, and to permit persons to whom the Software is furnished to do so, subject to the following conditions:

The above copyright notice and this permission notice shall be included in all copies or substantial portions of the Software.

THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM, OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE SOFTWARE.