Struct ScrollState 

pub struct ScrollState {
    pub position: usize,
    pub follow_bottom: bool,
    pub content_size: usize,
    pub viewport_size: usize,
}

A scrollable state for managing UI scrolling and positioning

Fields

position: usize

Current scroll position (0 = top of content)

follow_bottom: bool

Flag indicating if content should auto-scroll to bottom on new content

content_size: usize

Total content size (in lines) - updated by each render cycle

viewport_size: usize

Visible area size (in lines) - updated by each render cycle

Implementations

impl ScrollState

pub fn new() -> Self

Create a new scroll state

pub fn update_dimensions(&mut self, content_size: usize, viewport_size: usize)

Update the content and viewport sizes

pub fn max_scroll(&self) -> usize

Get the maximum valid scroll position

pub fn clamp_position(&mut self)

Ensure scroll position is within valid bounds

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

Scroll down by the specified amount

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

Scroll up by the specified amount

pub fn scroll_to_top(&mut self)

Scroll to the top of the content

pub fn scroll_to_bottom(&mut self)

Scroll to the bottom of the content

pub fn page_up(&mut self)

Page up (scroll up by viewport height)

pub fn page_down(&mut self)

Page down (scroll down by viewport height)

pub fn has_more_above(&self) -> bool

Determine if we need to show the “more above” indicator

pub fn has_more_below(&self) -> bool

Determine if we need to show the “more below” indicator

Trait Implementations

impl Clone for ScrollState

fn clone(&self) -> ScrollState

Returns a duplicate of the value.

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

Performs copy-assignment from source.

impl Debug for ScrollState

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

Formats the value using the given formatter.

impl Default for ScrollState

fn default() -> ScrollState

Returns the “default value” for a type.