Module text 

Text storage and editing with styled segments.

This module provides rope-backed text buffers for efficient editing of large documents.

Grapheme Pool Policy

This module’s public API uses &str for text content, keeping grapheme pool details internal. Multi-codepoint grapheme clusters (emoji, ZWJ sequences) are handled transparently during rendering using crate::GraphemeId::placeholder for width-aware layout without pool allocation. Users needing direct grapheme pool access should use crate::GraphemePool and crate::GraphemeId from the crate root.

Key types:

• TextBuffer: Styled text storage with syntax highlighting support
• EditBuffer: Editable buffer with cursor movement and undo/redo
• EditorView: Visual rendering with line numbers and selection
• TextBufferView: Viewport configuration with wrapping modes

Examples

Basic Text Buffer

use opentui_rust::TextBuffer;

let buffer = TextBuffer::with_text("Hello, world!");
assert_eq!(buffer.len_chars(), 13);
assert_eq!(buffer.len_lines(), 1);

Editable Buffer with Undo

use opentui_rust::EditBuffer;

let mut editor = EditBuffer::new();
editor.insert("Hello");
editor.commit(); // Create undo checkpoint
editor.insert(" World");
editor.commit();
assert_eq!(editor.text(), "Hello World");

// Undo the last insert
editor.undo();
assert_eq!(editor.text(), "Hello");

// Redo brings it back
editor.redo();
assert_eq!(editor.text(), "Hello World");

Structs

EditBuffer

Text buffer with editing operations, cursor, and undo/redo.

EditorView

Editor view wrapping an EditBuffer with visual rendering.

LineInfo

Cached line layout information for wrapped text.

LocalSelection

Local (viewport) selection based on screen coordinates.

RopeWrapper

Wrapper around ropey::Rope with convenience methods.

Selection

Selection range.

StyledSegment

A segment of text with associated style.

TextBuffer

Text buffer with styled segments and highlights.

TextBufferView

View into a text buffer with viewport and rendering options.

TextMeasure

Measurement result for a given viewport size.

Viewport

Viewport configuration.

VisualCursor

Visual cursor information in wrapped view.

Enums

WrapMode

Text wrapping mode.