Struct Buffer 

pub struct Buffer { /* private fields */ }

The text buffer, wrapping a ropey::Rope with position conversion helpers.

Implementations

impl Buffer

pub fn from_text(text: &str) -> Self

Create a buffer from a string.

pub fn new() -> Self

Create an empty buffer.

pub fn rope(&self) -> &Rope

The underlying rope.

pub fn version(&self) -> u64

Document version, incremented on every edit.

pub fn len_chars(&self) -> usize

Total number of chars in the document.

pub fn len_lines(&self) -> usize

Total number of lines (always >= 1).

pub fn is_empty(&self) -> bool

True if the document is empty.

pub fn text(&self) -> String

Get the full text as a String.

pub fn line(&self, line_idx: usize) -> RopeSlice<'_>

Get text of a specific line (0-indexed), including trailing newline if present.

pub fn line_len(&self, line_idx: usize) -> usize

Number of chars in a given line (excluding trailing line-ending chars). Handles \n, \r\n, and lone \r.

pub fn len_bytes(&self) -> usize

Total number of bytes in the document.

pub fn char_to_byte(&self, char_idx: usize) -> usize

Convert a char offset to a byte offset.

pub fn byte_to_char(&self, byte_idx: usize) -> usize

Convert a byte offset to a char offset.

pub fn line_to_char(&self, line_idx: usize) -> usize

Get the char offset of the start of a line.

pub fn pos_to_char(&self, pos: Position) -> usize

Convert a Position (line, col) to a char offset in the rope. Clamps to valid range.

pub fn char_to_pos(&self, char_idx: usize) -> Position

Convert a char offset to a Position (line, col).

pub fn clamp_pos(&self, pos: Position) -> Position

Clamp a Position to valid document bounds.

Trait Implementations

impl Clone for Buffer

fn clone(&self) -> Buffer

Returns a duplicate of the value.

fn clone_from(&mut self, source: &Self)

Performs copy-assignment from source.

impl Debug for Buffer

fn fmt(&self, f: &mut Formatter<'_>) -> Result

Formats the value using the given formatter.

impl Default for Buffer

fn default() -> Self

Returns the “default value” for a type.