Struct LineIndex 

pub struct LineIndex { /* private fields */ }

Logical line index - implemented using Rope data structure

Rope provides O(log N) line access, insertion, and deletion performance, suitable for large file editing

Implementations

impl LineIndex

pub fn new() -> Self

Create a new line index

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

Build line index from text

pub fn append_line(&mut self, line: LineMetadata)

Append a new line

pub fn insert_line(&mut self, line_number: usize, line: LineMetadata)

Insert a line at the specified position

pub fn delete_line(&mut self, line_number: usize)

Delete the specified line

pub fn get_line(&self, line_number: usize) -> Option<LineMetadata>

Get metadata for the specified line number (simulated)

pub fn get_line_mut(&mut self, line_number: usize) -> Option<&mut LineMetadata>

Get mutable reference (Rope doesn’t need this method, kept for compatibility)

pub fn line_to_offset(&self, line_number: usize) -> usize

Get byte offset for line number (excluding newlines of previous lines)

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

Get line number from byte offset (offset excludes newlines)

pub fn char_offset_to_position(&self, char_offset: usize) -> (usize, usize)

Get line number and offset within line from character offset

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

Get character offset from line number and column number

pub fn line_count(&self) -> usize

Get total line count

pub fn byte_count(&self) -> usize

Get total byte count

pub fn char_count(&self) -> usize

Get total character count

pub fn char_offset_to_byte_offset(&self, char_offset: usize) -> usize

Convert a character offset (Unicode scalar values) to a UTF-8 byte offset.

The returned byte offset is clamped to the document length.

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

Convert a UTF-8 byte offset to a character offset (Unicode scalar values).

The returned character offset is clamped to the document length.

pub fn char_offset_to_line_byte_column( &self, char_offset: usize, ) -> (usize, usize)

Convert a character offset to (line, byte_column) where byte_column is measured in UTF-8 bytes.

pub fn insert(&mut self, char_offset: usize, text: &str)

Insert text (at specified character offset)

pub fn delete(&mut self, start_char: usize, len_chars: usize)

Delete text range (character offset)

pub fn get_text(&self) -> String

Get complete text

pub fn get_line_text(&self, line_number: usize) -> Option<String>

Get text of the specified line (excluding newline)

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 Default for LineIndex

fn default() -> Self

Returns the “default value” for a type.