Struct ScrollState 

pub struct ScrollState { /* private fields */ }

Transcript scroll bookkeeping over visual (wrapped) lines.

Follows the bottom by default (new output stays in view). Scrolling up detaches at a fixed top line; scrolling back to the bottom (or End) re-attaches.

Implementations

impl ScrollState

pub fn new() -> Self

pub fn is_detached(&self) -> bool

pub fn top(&self, total: usize, height: usize) -> usize

Index of the first visible visual line for a viewport of height over total lines.

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

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

pub fn to_follow(&mut self)

End: jump to the bottom and re-attach.

Trait Implementations

impl Debug for ScrollState

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

Formats the value using the given formatter.

impl Default for ScrollState

fn default() -> Self

Returns the “default value” for a type.