use crate::prelude::*;

pub struct MaxSize {
    pub inner: StrongWidget,
    pub x: Option<Len>,
    pub y: Option<Len>,
}

impl Widget for MaxSize {
    fn draw(&mut self, painter: &mut Painter) -> Size {
        let child = painter.widget(&self.inner).size();
        let output = painter.output_size();
        Size {
            x: capped(child.x, self.x, output.x),
            y: capped(child.y, self.y, output.y),
        }
    }
}

fn capped(len: Len, max: Option<Len>, output: f32) -> Len {
    match max {
        Some(max) if len.apply_rest().to_abs(output) > max.apply_rest().to_abs(output) => max,
        _ => len,
    }
}