Struct Layer 

pub struct Layer<'a> {
    pub frame: &'a Frame,
    pub options: &'a OverlayOptions,
    pub active: bool,
}

One z-ordered viewport layer: a rendered frame placed declaratively at present time.

Stacking follows OverlayOptions::z, then slice order.

Fields

frame: &'a Frame

Source frame containing the layer cells.

options: &'a OverlayOptions

Placement, sizing, z, and visibility, resolved per present.

active: bool

Whether this layer owns the keyboard — and with it the hardware cursor: an active layer’s frame cursor places the caret (no frame cursor suppresses it), while passive layers let the base document’s caret show through. At most one layer should be active per present; among several, the topmost wins.

Implementations

impl Layer<'_>

pub fn band(&self, viewport: Size) -> OverlayBand

Resolved viewport band for viewport; rows == 0 means gated or empty.