Core editor primitives.

This crate provides a rope-based text buffer (via ropey) and small, focused navigation utilities suitable for implementing a Vim-like editor.

Notes on indexing

• ropey::Rope is UTF-8 text stored as a rope.
• Most editing operations are most naturally expressed in char indices (usize counts of Unicode scalar values), because ropey exposes many APIs in terms of char offsets.
• The UI may need byte indices for interoperability with external data, but those are not used as the primary index type in this crate.

redox-core

Core editor library for Redox.

This crate contains the editor primitives and behaviour that should stay independent of any UI:

• Rope-based text buffer (via ropey)
• Text indexing and cursor utilities (lines, columns, char indices, selections)
• Motions, text objects, search helpers, and small composable editing operations

Frontend crates should depend on redox-core and keep rendering, input mapping, and platform concerns outside this crate.