Struct LineIndex 

pub struct LineIndex<'a> { /* private fields */ }

Maps byte offsets into a source string to line/column coordinates.

Implementations

impl<'a> LineIndex<'a>

pub fn new(text: &'a str) -> Self

pub fn line_column(&self, offset: usize) -> LineColumn

Return the one-based human-readable line and column for offset.

Columns are counted in Unicode scalar values, matching Rust chars. Out-of-range offsets clamp to the document end; offsets in the middle of a UTF-8 sequence clamp back to the previous character boundary.

pub fn utf16_position(&self, offset: usize) -> Utf16Position

Return the zero-based line and UTF-16 column for offset.

This is the coordinate system used by LSP. Out-of-range offsets clamp to the document end; offsets in the middle of a UTF-8 sequence clamp back to the previous character boundary.

pub fn utf8_position(&self, offset: usize) -> Utf8Position

Return the zero-based line and UTF-8 byte column for offset.

pub fn end_utf16_position(&self) -> Utf16Position

The UTF-16 position one past the last character.

pub fn end_utf8_position(&self) -> Utf8Position

The UTF-8 position one past the last byte.

pub fn offset_for_utf16_position(&self, position: Utf16Position) -> usize

The byte offset for a zero-based line and UTF-16 column.

Out-of-range lines and columns clamp to the line or document end. A UTF-16 column landing in the middle of a surrogate pair maps to the start of that character.

pub fn offset_for_utf8_position(&self, position: Utf8Position) -> usize

The byte offset for a zero-based line and UTF-8 byte column.