Struct LineIndex 

pub struct LineIndex { /* private fields */ }

Line-start table over the original source.

Implementations

impl LineIndex

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

Build a LineIndex from full source text. O(n) in input length.

pub fn line_col(&self, offset: TextSize) -> LineCol

Convert a byte offset to 0-based line/column (UTF-8).

If offset falls inside a multi-byte character the result reports the mechanical byte-offset within the line — callers that need char-aligned columns are responsible for snapping.

Panics

Panics if the computed line index does not fit in u32, which requires a source file with more than u32::MAX lines — impossible for any input that also fits in a TextSize.

pub fn to_utf16(&self, pos: LineCol) -> WideLineCol

Convert a LineCol (UTF-8) to the LSP UTF-16 flavour.

pub fn from_utf16(&self, pos: WideLineCol) -> LineCol

Convert an LSP UTF-16 position back to a UTF-8 byte LineCol.

pub fn line_range(&self, line: u32) -> Option<TextRange>

Range of the given 0-based line in full-source byte offsets. Includes the trailing \n if the line has one. Returns None for lines past the end.

For the final line of the input (which has no trailing newline in the index) the range extends to TextSize::from(u32::MAX) as a sentinel end — callers that care about the “real” tail should clamp to the input length.

pub fn line_count(&self) -> u32

Number of lines in the input. Always >= 1; empty input has a single empty line.

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.