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use super::*;
/// The alignment of a child in a container.
pub type ChildAlign = Gen<Align>;
/// Where to align something along a directed axis.
#[derive(Debug, Copy, Clone, Eq, PartialEq, Ord, PartialOrd)]
pub enum Align {
/// Align at the start of the axis.
Start,
/// Align in the middle of the axis.
Center,
/// Align at the end of the axis.
End,
}
impl Align {
/// Returns the position of this alignment in the given range.
pub fn resolve(self, range: Range<Length>) -> Length {
match self {
Self::Start => range.start,
Self::Center => (range.start + range.end) / 2.0,
Self::End => range.end,
}
}
/// The inverse alignment.
pub fn inv(self) -> Self {
match self {
Self::Start => Self::End,
Self::Center => Self::Center,
Self::End => Self::Start,
}
}
}
impl Default for Align {
fn default() -> Self {
Self::Start
}
}
impl Display for Align {
fn fmt(&self, f: &mut Formatter) -> fmt::Result {
f.pad(match self {
Self::Start => "start",
Self::Center => "center",
Self::End => "end",
})
}
}
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