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use crate::{style, Bus, Element, Length, Widget};
use dodrio::bumpalo;
/// An amount of empty space.
///
/// It can be useful if you want to fill some space with nothing.
///
/// [`Empty`]: struct.Empty.html
#[derive(Debug)]
pub struct Empty {
width: Length,
height: Length,
}
impl Empty {
/// Creates an amount of [`Empty`] space.
///
/// [`Empty`]: struct.Empty.html
pub fn new() -> Self {
Empty {
width: Length::Shrink,
height: Length::Shrink,
}
}
/// Sets the width of the [`Empty`] space.
///
/// [`Empty`]: struct..html
pub fn width(mut self, width: Length) -> Self {
self.width = width;
self
}
/// Sets the height of the [`Empty`] space.
///
/// [`Empty`]: struct.Column.html
pub fn height(mut self, height: Length) -> Self {
self.height = height;
self
}
}
impl<'a, Message> Widget<Message> for Empty {
fn node<'b>(
&self,
bump: &'b bumpalo::Bump,
_publish: &Bus<Message>,
_style_sheet: &mut style::Sheet<'b>,
) -> dodrio::Node<'b> {
use dodrio::builder::*;
let width = style::length(self.width);
let height = style::length(self.height);
let style = bumpalo::format!(
in bump,
"width: {}; height: {};",
width,
height
);
div(bump).attr("style", style.into_bump_str()).finish()
}
}
impl<'a, Message> From<Empty> for Element<'a, Message> {
fn from(empty: Empty) -> Element<'a, Message> {
Element::new(empty)
}
}
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