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use crate::{Alignment, Padding, Point, Rectangle, Size, Vector};
/// The bounds of an element and its children.
#[derive(Debug, Clone, Default)]
pub struct Node {
bounds: Rectangle,
children: Vec<Node>,
}
impl Node {
/// Creates a new [`Node`] with the given [`Size`].
pub const fn new(size: Size) -> Self {
Self::with_children(size, Vec::new())
}
/// Creates a new [`Node`] with the given [`Size`] and children.
pub const fn with_children(size: Size, children: Vec<Node>) -> Self {
Node {
bounds: Rectangle {
x: 0.0,
y: 0.0,
width: size.width,
height: size.height,
},
children,
}
}
/// Creates a new [`Node`] that wraps a single child with some [`Padding`].
pub fn container(child: Self, padding: Padding) -> Self {
Self::with_children(
child.bounds.size().expand(padding),
vec![child.move_to(Point::new(padding.left, padding.top))],
)
}
/// Returns the [`Size`] of the [`Node`].
pub fn size(&self) -> Size {
Size::new(self.bounds.width, self.bounds.height)
}
/// Returns the bounds of the [`Node`].
pub fn bounds(&self) -> Rectangle {
self.bounds
}
/// Returns the children of the [`Node`].
pub fn children(&self) -> &[Node] {
&self.children
}
/// Aligns the [`Node`] in the given space.
pub fn align(
mut self,
horizontal_alignment: Alignment,
vertical_alignment: Alignment,
space: Size,
) -> Self {
self.align_mut(horizontal_alignment, vertical_alignment, space);
self
}
/// Mutable reference version of [`Self::align`].
pub fn align_mut(
&mut self,
horizontal_alignment: Alignment,
vertical_alignment: Alignment,
space: Size,
) {
match horizontal_alignment {
Alignment::Start => {}
Alignment::Center => {
self.bounds.x += (space.width - self.bounds.width) / 2.0;
}
Alignment::End => {
self.bounds.x += space.width - self.bounds.width;
}
}
match vertical_alignment {
Alignment::Start => {}
Alignment::Center => {
self.bounds.y += (space.height - self.bounds.height) / 2.0;
}
Alignment::End => {
self.bounds.y += space.height - self.bounds.height;
}
}
}
/// Moves the [`Node`] to the given position.
pub fn move_to(mut self, position: impl Into<Point>) -> Self {
self.move_to_mut(position);
self
}
/// Mutable reference version of [`Self::move_to`].
pub fn move_to_mut(&mut self, position: impl Into<Point>) {
let position = position.into();
self.bounds.x = position.x;
self.bounds.y = position.y;
}
/// Translates the [`Node`] by the given translation.
pub fn translate(mut self, translation: impl Into<Vector>) -> Self {
self.translate_mut(translation);
self
}
/// Translates the [`Node`] by the given translation.
pub fn translate_mut(&mut self, translation: impl Into<Vector>) {
self.bounds = self.bounds + translation.into();
}
}
|
