Struct LineIndex 

pub struct LineIndex { /* private fields */ }

Maps between byte offsets and LSP Position (line, character).

LSP positions use zero-based line and UTF-16 code unit offsets. Our source strings use byte offsets. This struct pre-computes line start byte offsets for efficient bidirectional conversion.

Implementations

impl LineIndex

pub fn new(source: &str) -> Self

pub fn position(&self, byte_offset: usize) -> Position

Convert a byte offset to an LSP Position.

Returns (line, character) where character is a UTF-16 code unit offset.

pub fn line_start_offset(&self, line: usize) -> usize

Return the byte offset of the start of line (0-indexed). Returns source.len() if line is out of bounds.

pub fn utf16_length(&self, byte_start: usize, byte_end: usize) -> u32

Compute the UTF-16 length of a byte range in the source.

pub fn offset(&self, position: Position) -> usize

Convert an LSP Position to a byte offset.

Trait Implementations

impl Clone for LineIndex

fn clone(&self) -> LineIndex

Returns a duplicate of the value.

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

Performs copy-assignment from source.

impl Debug for LineIndex

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

Formats the value using the given formatter.