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