Struct Buffer 

pub struct Buffer {
    pub lines: Vec<Line>,
    pub viewport: Viewport,
    pub cursor: Cursor,
    pub selection: Option<Selection>,
    /* private fields */
}

The main buffer holding all parsed lines and view state.

Fields

lines: Vec<Line>

viewport: Viewport

cursor: Cursor

selection: Option<Selection>

Implementations

impl Buffer

pub fn new(lines: Vec<Line>) -> Self

Create a new buffer from parsed lines.

pub fn line_count(&self) -> usize

Total number of lines in the buffer.

pub fn get_line(&self, index: usize) -> Option<&Line>

Get a reference to a line by index, if it exists.

pub fn current_line(&self) -> Option<&Line>

pub fn visible_lines(&self) -> &[Line]

Get the lines currently visible in the viewport.

pub fn scroll_down(&mut self, n: usize)

Scroll down by n lines, clamping to bounds.

pub fn scroll_up(&mut self, n: usize)

Scroll up by n lines, clamping to bounds.

pub fn cursor_down(&mut self, n: usize)

Move cursor down, scrolling viewport if needed.

pub fn cursor_up(&mut self, n: usize)

Move cursor up, scrolling viewport if needed.

pub fn cursor_right(&mut self, n: usize)

Move cursor right within the current line.

pub fn cursor_left(&mut self, n: usize)

Move cursor left within the current line.

pub fn cursor_top(&mut self)

Jump cursor to the first line.

pub fn cursor_bottom(&mut self)

Jump cursor to the last line.

pub fn half_page_down(&mut self)

Half-page down.

pub fn half_page_up(&mut self)

Half-page up.

pub fn page_down(&mut self)

pub fn page_up(&mut self)

pub fn cursor_line_start(&mut self)

pub fn cursor_line_end(&mut self)

pub fn cursor_first_nonblank(&mut self)

pub fn cursor_view_top(&mut self)

pub fn cursor_view_middle(&mut self)

pub fn cursor_view_bottom(&mut self)

pub fn set_cursor(&mut self, row: usize, col: usize)

pub fn resize(&mut self, width: usize, height: usize)

Update viewport dimensions (called on terminal resize).

pub fn ensure_cursor_visible_pub(&mut self)

Public version of ensure_cursor_visible for external callers.

pub fn preferred_col(&self) -> usize