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use std::fmt::{self, Debug, Formatter};
use super::*;
/// A node that adds spacing to its parent.
#[derive(Copy, Clone, PartialEq)]
pub struct SpacingNode {
/// The amount of spacing to insert.
pub amount: Length,
/// Defines how spacing interacts with surrounding spacing.
///
/// Hard spacing (`softness = 0`) assures that a fixed amount of spacing
/// will always be inserted. Soft spacing (`softness >= 1`) will be consumed
/// by other spacing with lower softness and can be used to insert
/// overridable spacing, e.g. between words or paragraphs.
pub softness: u8,
}
impl Layout for SpacingNode {
fn layout(&self, _: &mut LayoutContext, _: &Areas) -> Fragment {
Fragment::Spacing(self.amount)
}
}
impl Debug for SpacingNode {
fn fmt(&self, f: &mut Formatter) -> fmt::Result {
write!(f, "Spacing({}, {})", self.amount, self.softness)
}
}
impl From<SpacingNode> for Node {
fn from(spacing: SpacingNode) -> Self {
Self::Spacing(spacing)
}
}
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