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use super::*;
use crate::geom::Linear;
/// A node that can fix its child's width and height.
#[derive(Debug, Clone, PartialEq)]
pub struct Fixed {
pub width: Option<Linear>,
pub height: Option<Linear>,
pub child: LayoutNode,
}
#[async_trait(?Send)]
impl Layout for Fixed {
async fn layout(
&self,
ctx: &mut LayoutContext,
constraints: LayoutConstraints,
) -> Vec<LayoutItem> {
let space = constraints.spaces[0];
let size = Size::new(
self.width
.map(|w| w.eval(space.base.width))
.unwrap_or(space.size.width),
self.height
.map(|h| h.eval(space.base.height))
.unwrap_or(space.size.height),
);
self.child
.layout(ctx, LayoutConstraints {
spaces: vec![LayoutSpace { base: size, size }],
repeat: false,
})
.await
}
}
impl From<Fixed> for LayoutNode {
fn from(fixed: Fixed) -> Self {
Self::dynamic(fixed)
}
}
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