Struct Renderer 

pub struct Renderer<W: Write> { /* private fields */ }

Pure TUI renderer with frame diffing and terminal state management.

Uses relative cursor movement (MoveUp + \r) to navigate back to the start of the managed region. This avoids absolute row tracking, which breaks when the terminal scrolls content upward.

Cursor invariant: After every render or push_to_scrollback, the cursor sits at the end of the last managed line unless explicitly repositioned afterward.

Implementations

impl<W: Write> Renderer<W>

pub fn new(writer: W, theme: Theme, size: impl Into<Size>) -> Self

pub fn render_frame( &mut self, f: impl FnOnce(&ViewContext) -> Frame, ) -> Result<()>

Render a frame using a closure.

The closure receives a ViewContext and returns a Frame.

pub fn clear_screen(&mut self) -> Result<()>

pub fn push_to_scrollback(&mut self, lines: &[Line]) -> Result<()>

pub fn on_resize(&mut self, size: impl Into<Size>)

pub fn context(&self) -> ViewContext

pub fn set_theme(&mut self, theme: Theme)

pub fn apply_commands(&mut self, commands: Vec<RendererCommand>) -> Result<()>

pub fn writer(&self) -> &W

pub fn test_writer_mut(&mut self) -> &mut W