Grcov report - bbox.rs

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//! Bounding boxes that know their coordinate space.

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use crate::rect::Rect;

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use crate::transform::Transform;

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#[derive(Debug, Default, Copy, Clone)]

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pub struct BoundingBox {

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    transform: Transform,

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    pub rect: Option<Rect>,     // without stroke

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    pub ink_rect: Option<Rect>, // with stroke

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impl BoundingBox {

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    pub fn new() -> BoundingBox {

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        Default::default()

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    pub fn with_transform(self, transform: Transform) -> BoundingBox {

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        BoundingBox { transform, ..self }

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    pub fn with_rect(self, rect: Rect) -> BoundingBox {

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        BoundingBox {

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            rect: Some(rect),

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            ..self

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    pub fn with_ink_rect(self, ink_rect: Rect) -> BoundingBox {

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        BoundingBox {

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            ink_rect: Some(ink_rect),

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            ..self

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    pub fn clear(mut self) {

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        self.rect = None;

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        self.ink_rect = None;

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    fn combine(&mut self, src: &BoundingBox, clip: bool) {

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        if src.rect.is_none() && src.ink_rect.is_none() {

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            return;

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        // this will panic!() if it's not invertible... should we check on our own?

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        let transform = self

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            .transform

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            .invert()

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            .unwrap()

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            .pre_transform(&src.transform);

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        self.rect = combine_rects(self.rect, src.rect, &transform, clip);

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        self.ink_rect = combine_rects(self.ink_rect, src.ink_rect, &transform, clip);

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    pub fn insert(&mut self, src: &BoundingBox) {

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        self.combine(src, false);

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    pub fn clip(&mut self, src: &BoundingBox) {

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        self.combine(src, true);

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fn combine_rects(

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    r1: Option<Rect>,

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    r2: Option<Rect>,

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    transform: &Transform,

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    clip: bool,

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) -> Option<Rect> {

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    match (r1, r2, clip) {

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        (r1, None, _) => r1,

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        (None, Some(r2), _) => Some(transform.transform_rect(&r2)),

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        (Some(r1), Some(r2), true) => transform

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            .transform_rect(&r2)

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            .intersection(&r1)

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            .or_else(|| Some(Rect::default())),

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        (Some(r1), Some(r2), false) => Some(transform.transform_rect(&r2).union(&r1)),

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#[cfg(test)]

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mod tests {

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    use super::*;

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    #[test]

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    fn combine() {

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        let r1 = Rect::new(1.0, 2.0, 3.0, 4.0);

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        let r2 = Rect::new(1.5, 2.5, 3.5, 4.5);

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        let r3 = Rect::new(10.0, 11.0, 12.0, 13.0);

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        let t = Transform::new_unchecked(1.0, 0.0, 0.0, 1.0, 0.5, 0.5);

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        let res = combine_rects(None, None, &t, true);

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        assert_eq!(res, None);

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        let res = combine_rects(None, None, &t, false);

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        assert_eq!(res, None);

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        let res = combine_rects(Some(r1), None, &t, true);

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        assert_eq!(res, Some(r1));

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        let res = combine_rects(Some(r1), None, &t, false);

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        assert_eq!(res, Some(r1));

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        let res = combine_rects(None, Some(r2), &t, true);

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        assert_eq!(res, Some(Rect::new(2.0, 3.0, 4.0, 5.0)));

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        let res = combine_rects(None, Some(r2), &t, false);

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        assert_eq!(res, Some(Rect::new(2.0, 3.0, 4.0, 5.0)));

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        let res = combine_rects(Some(r1), Some(r2), &t, true);

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        assert_eq!(res, Some(Rect::new(2.0, 3.0, 3.0, 4.0)));

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        let res = combine_rects(Some(r1), Some(r3), &t, true);

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        assert_eq!(res, Some(Rect::default()));

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        let res = combine_rects(Some(r1), Some(r2), &t, false);

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        assert_eq!(res, Some(Rect::new(1.0, 2.0, 4.0, 5.0)));

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