Struct Loader 

pub struct Loader { /* private fields */ }

Loader component with optional spinning animation. Port of pi’s packages/tui/src/components/loader.ts.

pi’s Loader extends Text. In rab we wrap Text via composition.

Implementations

impl Loader

pub fn new( spinner_color_fn: Box<dyn Fn(&str) -> String>, message_color_fn: Box<dyn Fn(&str) -> String>, message: impl Into<String>, ) -> Self

pub fn start(&mut self)

pub fn stop(&mut self)

pub fn set_message(&mut self, message: impl Into<String>)

pub fn set_indicator(&mut self, indicator: LoaderIndicatorOptions)

pub fn tick(&mut self) -> bool

Advance to next frame if interval elapsed. Returns true if display changed.

Trait Implementations

impl Component for Loader

fn render(&self, width: usize) -> Vec<String>

Render to lines for the given viewport width. Each returned string MUST NOT exceed width in visible width.

fn handle_input(&mut self, _key: &KeyEvent) -> bool

Handle keyboard input. Return true if consumed.

fn invalidate(&mut self)

Mark this component as needing re-render. Called when internal state changes (output received, expanded toggled, etc.).

fn handle_paste(&mut self, _text: &str)

Handle a paste event (text from bracketed paste mode). Default no-op; override to process pasted content.

fn is_dirty(&self) -> bool

Check if this component needs re-render. Default: always re-render (conservative).

fn clear_dirty(&mut self)

Clear dirty flag after successful render.

fn cache_key(&self, _width: usize) -> Option<RenderCacheKey>

Get the cache key for this component’s current state. Return None to disable caching (always re-render).

fn get_cached_render(&self) -> Option<&RenderCache>

Get cached render output, if available and valid.

fn set_cached_render(&mut self, _cache: RenderCache)

Store render output in cache.

fn is_focusable(&self) -> bool

Whether this component wants focus (for IME cursor positioning).

fn set_expanded(&mut self, _expanded: bool)

Toggle expanded/collapsed state. No-op by default. Override for components that support expand/collapse (tool results, messages, etc.).

fn set_hide_thinking(&mut self, _hide: bool)

Toggle thinking block visibility. No-op by default. Override for components that display thinking content (AssistantMessageComponent).