flo_rope

This is a Rust library containing an implementation of the rope data structure. Ropes are an extension of the string type that support efficient manipulation of very large amounts of data.

flo_rope adds a couple of extensions to the usual features of the data structure:

• It allows for ropes of any 'cell' type so it's not just a replacement for character strings but also vector types with the same editing properties
• It supports attaching attributes to regions in the rope. This makes it suitable for tasks like representing text with attached formatting information.
• It supplies a 'push' and 'pull' model for mirroring changes to a rope elsewhere. (for example, to update a user interface in response to changes to the rope)

Ropes are quite typically used for text editors for their performance characteristics: flo_rope provides a way to represent text colours and set up a pipeline to use those colours to perform syntax highlighting. The 'pull' model is highly suited to representing text regions (and other collection data structures) in a reactive user interface.

A companion library, flo_binding will provide support for the reactive model of ropes, suitable for integrating into a user interface.

Examples

Replacing a range in a rope

use flo_rope::*;

let mut rope = AttributedRope::<_, ()>::from(vec![1, 2, 3, 4, 5, 6, 7, 8]);

rope.replace(1..3, vec![42]);
assert!(rope.read_cells(0..rope.len()).cloned().collect::<Vec<_>>() == vec![1,42,4,5,6,7,8]);