diff options
| author | Laurenz <laurmaedje@gmail.com> | 2022-02-28 15:50:48 +0100 |
|---|---|---|
| committer | Laurenz <laurmaedje@gmail.com> | 2022-02-28 23:54:34 +0100 |
| commit | 3ca5b238238e1128aa7bbfbd5db9e632045d8600 (patch) | |
| tree | 2471f4b340a15695b7f4d518c0b39fabaea676c4 /src/library/shape.rs | |
| parent | b63c21c91d99a1554a019dc275f955d3e6a34271 (diff) | |
Reorganize library
Diffstat (limited to 'src/library/shape.rs')
| -rw-r--r-- | src/library/shape.rs | 156 |
1 files changed, 0 insertions, 156 deletions
diff --git a/src/library/shape.rs b/src/library/shape.rs deleted file mode 100644 index bf159c52..00000000 --- a/src/library/shape.rs +++ /dev/null @@ -1,156 +0,0 @@ -//! Colorable geometrical shapes. - -use std::f64::consts::SQRT_2; - -use super::prelude::*; -use super::TextNode; - -/// Place a node into a sizable and fillable shape. -#[derive(Debug, Hash)] -pub struct ShapeNode<const S: ShapeKind>(pub Option<LayoutNode>); - -#[class] -impl<const S: ShapeKind> ShapeNode<S> { - /// How to fill the shape. - pub const FILL: Option<Paint> = None; - /// How the stroke the shape. - pub const STROKE: Smart<Option<Paint>> = Smart::Auto; - /// The stroke's thickness. - pub const THICKNESS: Length = Length::pt(1.0); - /// How much to pad the shape's content. - pub const PADDING: Linear = Linear::zero(); - - fn construct(_: &mut Context, args: &mut Args) -> TypResult<Template> { - let size = match S { - SQUARE => args.named::<Length>("size")?.map(Linear::from), - CIRCLE => args.named::<Length>("radius")?.map(|r| 2.0 * Linear::from(r)), - _ => None, - }; - - let width = match size { - None => args.named("width")?, - size => size, - }; - - let height = match size { - None => args.named("height")?, - size => size, - }; - - Ok(Template::inline( - Self(args.find()?).pack().sized(Spec::new(width, height)), - )) - } -} - -impl<const S: ShapeKind> Layout for ShapeNode<S> { - fn layout( - &self, - ctx: &mut Context, - regions: &Regions, - styles: StyleChain, - ) -> TypResult<Vec<Arc<Frame>>> { - let mut frames; - if let Some(child) = &self.0 { - let mut padding = styles.get(Self::PADDING); - if is_round(S) { - padding.rel += Relative::new(0.5 - SQRT_2 / 4.0); - } - - // Pad the child. - let child = child.clone().padded(Sides::splat(padding)); - - let mut pod = Regions::one(regions.first, regions.base, regions.expand); - frames = child.layout(ctx, &pod, styles)?; - - // Relayout with full expansion into square region to make sure - // the result is really a square or circle. - if is_quadratic(S) { - let length = if regions.expand.x || regions.expand.y { - let target = regions.expand.select(regions.first, Size::zero()); - target.x.max(target.y) - } else { - let size = frames[0].size; - let desired = size.x.max(size.y); - desired.min(regions.first.x).min(regions.first.y) - }; - - pod.first = Size::splat(length); - pod.expand = Spec::splat(true); - frames = child.layout(ctx, &pod, styles)?; - } - } else { - // The default size that a shape takes on if it has no child and - // enough space. - let mut size = - Size::new(Length::pt(45.0), Length::pt(30.0)).min(regions.first); - - if is_quadratic(S) { - let length = if regions.expand.x || regions.expand.y { - let target = regions.expand.select(regions.first, Size::zero()); - target.x.max(target.y) - } else { - size.x.min(size.y) - }; - size = Size::splat(length); - } else { - size = regions.expand.select(regions.first, size); - } - - frames = vec![Arc::new(Frame::new(size))]; - } - - let frame = Arc::make_mut(&mut frames[0]); - - // Add fill and/or stroke. - let fill = styles.get(Self::FILL); - let thickness = styles.get(Self::THICKNESS); - let stroke = styles - .get(Self::STROKE) - .unwrap_or(fill.is_none().then(|| Color::BLACK.into())) - .map(|paint| Stroke { paint, thickness }); - - if fill.is_some() || stroke.is_some() { - let geometry = if is_round(S) { - Geometry::Ellipse(frame.size) - } else { - Geometry::Rect(frame.size) - }; - - let shape = Shape { geometry, fill, stroke }; - frame.prepend(Point::zero(), Element::Shape(shape)); - } - - // Apply link if it exists. - if let Some(url) = styles.get_ref(TextNode::LINK) { - frame.link(url); - } - - Ok(frames) - } -} - -/// A category of shape. -pub type ShapeKind = usize; - -/// A rectangle with equal side lengths. -pub const SQUARE: ShapeKind = 0; - -/// A quadrilateral with four right angles. -pub const RECT: ShapeKind = 1; - -/// An ellipse with coinciding foci. -pub const CIRCLE: ShapeKind = 2; - -/// A curve around two focal points. -pub const ELLIPSE: ShapeKind = 3; - -/// Whether a shape kind is curvy. -fn is_round(kind: ShapeKind) -> bool { - matches!(kind, CIRCLE | ELLIPSE) -} - -/// Whether a shape kind has equal side length. -fn is_quadratic(kind: ShapeKind) -> bool { - matches!(kind, SQUARE | CIRCLE) -} |
