Struct CursorState 

pub struct CursorState {
    pub position: CursorPosition,
    pub selection: Option<Selection>,
    pub preferred_col: Option<usize>,
}

The full cursor state for a text editing session.

Tracks the cursor position, optional selection, and the preferred column for vertical movement (so moving up/down through short lines returns to the original column).

Fields

position: CursorPosition

Current cursor position.

selection: Option<Selection>

Active selection, if any.

preferred_col: Option<usize>

Preferred column for vertical movement.

Implementations

impl CursorState

pub fn new(line: usize, col: usize) -> Self

Create a new cursor state at the given position.

pub fn move_left(&mut self, buffer: &TextBuffer)

Move cursor left by one character, wrapping to the previous line.

pub fn move_right(&mut self, buffer: &TextBuffer)

Move cursor right by one character, wrapping to the next line.

pub fn move_up(&mut self, buffer: &TextBuffer)

Move cursor up by one line, preserving the preferred column.

pub fn move_down(&mut self, buffer: &TextBuffer)

Move cursor down by one line, preserving the preferred column.

pub fn move_to_line_start(&mut self)

Move cursor to the start of the current line.

pub fn move_to_line_end(&mut self, buffer: &TextBuffer)

Move cursor to the end of the current line.

pub fn move_to_buffer_start(&mut self)

Move cursor to the beginning of the buffer.

pub fn move_to_buffer_end(&mut self, buffer: &TextBuffer)

Move cursor to the end of the buffer.

pub fn start_selection(&mut self)

Start a selection at the current cursor position.

pub fn extend_selection(&mut self)

Extend the selection to the current cursor position.

If no selection exists, this starts one from the current position.

pub fn clear_selection(&mut self)

Clear the current selection.

pub fn selected_text(&self, buffer: &TextBuffer) -> Option<String>

Get the text currently selected in the buffer.

Returns None if there is no selection or the selection is empty.

Trait Implementations

impl Clone for CursorState

fn clone(&self) -> CursorState

Returns a duplicate of the value.

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

Performs copy-assignment from source.

impl Debug for CursorState

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

Formats the value using the given formatter.