Struct CursorNavigator 

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

Cursor navigation helper for rope-backed text.

Implementations

impl<'a> CursorNavigator<'a>

pub const fn new(rope: &'a Rope) -> Self

Create a new navigator for the given rope.

pub fn clamp(&self, pos: CursorPosition) -> CursorPosition

Clamp an arbitrary position to valid ranges.

pub fn from_line_grapheme(&self, line: usize, grapheme: usize) -> CursorPosition

Build a position from line + grapheme index.

pub fn from_visual_col(&self, line: usize, visual_col: usize) -> CursorPosition

Build a position from line + visual column.

pub fn to_byte_index(&self, pos: CursorPosition) -> usize

Convert a cursor position to a byte index into the rope.

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

Convert a byte index into a cursor position.

pub fn move_left(&self, pos: CursorPosition) -> CursorPosition

Move cursor left by one grapheme (across line boundaries).

pub fn move_right(&self, pos: CursorPosition) -> CursorPosition

Move cursor right by one grapheme (across line boundaries).

pub fn move_up(&self, pos: CursorPosition) -> CursorPosition

Move cursor up one line, preserving visual column.

pub fn move_down(&self, pos: CursorPosition) -> CursorPosition

Move cursor down one line, preserving visual column.

pub fn line_start(&self, pos: CursorPosition) -> CursorPosition

Move cursor to start of line.

pub fn line_end(&self, pos: CursorPosition) -> CursorPosition

Move cursor to end of line.

pub fn document_start(&self) -> CursorPosition

Move cursor to start of document.

pub fn document_end(&self) -> CursorPosition

Move cursor to end of document.

pub fn move_word_left(&self, pos: CursorPosition) -> CursorPosition

Move cursor left by one word boundary.

pub fn move_word_right(&self, pos: CursorPosition) -> CursorPosition

Move cursor right by one word boundary.

Trait Implementations

impl<'a> Clone for CursorNavigator<'a>

fn clone(&self) -> CursorNavigator<'a>

Returns a duplicate of the value.

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

Performs copy-assignment from source.

impl<'a> Debug for CursorNavigator<'a>

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

Formats the value using the given formatter.

impl<'a> Copy for CursorNavigator<'a>