Struct ListSource 

pub struct ListSource {
    pub len: Rc<dyn Fn() -> usize>,
    pub token_at: Rc<dyn Fn(usize) -> u64>,
    pub bind_row: Rc<dyn Fn(usize, RawHandle)>,
    pub recycle: Rc<dyn Fn(RawHandle)>,
    pub reorder: Option<ListReorder>,
}

The synchronous row-pull seam for recycling lists (docs/list.md, §10). day-core injects one per LIST host via Toolkit::attach_list; a recycling backend stores it and calls it from its native data-source (on the UI thread, outside any day-core borrow). Each closure re-enters day-core, so — unlike EventSink — these run to completion synchronously (bind_row even flushes + lays out the row before returning, so the host can measure the cell immediately).

Fields

len: Rc<dyn Fn() -> usize>

Current row count.

token_at: Rc<dyn Fn(usize) -> u64>

Stable identity token for the row at index (for native diffing / animation).

bind_row: Rc<dyn Fn(usize, RawHandle)>

Build (first use of this cell) or rebind (recycled cell) row index into the native cell.

recycle: Rc<dyn Fn(RawHandle)>

The native cell left the viewport — Day may drop per-cell bookkeeping (optional).

reorder: Option<ListReorder>

Drag-to-reorder seam, present when ListProps::reorderable (docs/list.md). None on non-reorderable lists — backends must not enable their drag machinery without it.

Trait Implementations

impl Clone for ListSource

fn clone(&self) -> ListSource

Returns a duplicate of the value.

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

Performs copy-assignment from source.