# llimphi-widget-text-editor-core

The agnostic core of the code editor.

Thin, **pure** layers (no IO, no Llimphi, no GPU) over `ropey`:

- `buffer` — a `Rope` wrapper with (line, col) ↔ char_offset conversions.
- `cursor` — `Cursor` + `Selection`; movement by char/word/line/page.
- `ops` — pure editing operations over `(Buffer, Cursor) → (Buffer, Cursor)`.
- `undo` — reversible stack: every operation is recorded as an `EditDelta`.
- `bracket` — matching of parentheses, braces and brackets.
- `find` — incremental search over the buffer.
- `diagnostics` — the model of diagnostics (errors/warnings) by range.
- `clipboard` — a clipboard abstraction (mem/null) that never touches the OS.
- `highlight` — syntax highlighting with tree-sitter (Rust/Python/WAT/Plain).

Its only external coupling is `peniko::Color` in `highlight::SyntaxPalette` — a
colour type, not the render stack. That leaves the core reusable from a TUI, a
mini-REPL, a single-line text input, a web backend, and so on. The visual layer
(state + view over Llimphi) lives in `llimphi-widget-text-editor`, which
re-exports this whole core.

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Part of **llimphi** — see [llimphi](../../README.md).