use crate::prelude::*;

pub struct Sized {
    pub inner: WidgetHandle,
    pub x: Option<Len>,
    pub y: Option<Len>,
}

impl Sized {
    fn apply_to_outer(&self, ctx: &mut SizeCtx) {
        if let Some(x) = self.x {
            ctx.outer.x.select_len(x.apply_rest());
        }
        if let Some(y) = self.y {
            ctx.outer.y.select_len(y.apply_rest());
        }
    }
}

impl Widget for Sized {
    fn draw(&mut self, painter: &mut Painter) {
        painter.widget(&self.inner);
    }

    fn desired_width(&mut self, ctx: &mut SizeCtx) -> Len {
        self.apply_to_outer(ctx);
        self.x.unwrap_or_else(|| ctx.width(&self.inner))
    }

    fn desired_height(&mut self, ctx: &mut SizeCtx) -> Len {
        self.apply_to_outer(ctx);
        self.y.unwrap_or_else(|| ctx.height(&self.inner))
    }
}