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use super::*;
use std::convert::TryFrom;
use std::fmt::Debug;
use std::ops::Deref;
#[derive(Clone, Copy, Debug, Default)]
pub struct ValidDimensions<S: Scalar>(Dimensions<S>);
impl<S: Scalar> Deref for ValidDimensions<S> { type Target = Dimensions<S>; fn deref(&self) -> &Self::Target { &self.0 } }
impl<S: Scalar> PartialEq<ValidDimensions<S>> for ValidDimensions<S> { fn eq(&self, other: &ValidDimensions<S>) -> bool { self.0 == other.0 } }
impl<S: Scalar> PartialEq<Dimensions<S>> for ValidDimensions<S> { fn eq(&self, other: &Dimensions<S> ) -> bool { self.0 == *other } }
impl<S: Scalar> PartialEq<ValidDimensions<S>> for Dimensions<S> { fn eq(&self, other: &ValidDimensions<S>) -> bool { *self == other.0 } }
#[derive(Clone, Copy, Debug, Default, PartialEq)]
pub struct Dimensions<S: Scalar> {
pub outer: Rect<S>,
pub inner: Rect<S>,
}
impl<S: Scalar> Dimensions<S> {
#[must_use] pub fn validate(&self) -> Result<ValidDimensions<S>, Error> {
if !(self.outer.left <= self.inner.left ) { return err("Expected outer.left ≤ inner.left"); }
if !(self.inner.left <= self.inner.right ) { return err("Expected inner.left ≤ inner.right"); }
if !(self.inner.right <= self.outer.right ) { return err("Expected inner.right ≤ outer.right"); }
if !(self.outer.top <= self.inner.top ) { return err("Expected outer.top ≤ inner.top"); }
if !(self.inner.top <= self.inner.bottom) { return err("Expected inner.top ≤ inner.bottom"); }
if !(self.inner.bottom <= self.outer.bottom) { return err("Expected inner.bottom ≤ outer.bottom"); }
Ok(ValidDimensions(*self))
}
#[must_use] pub(crate) fn debug_assert_valid(&self) -> ValidDimensions<S> {
if DEBUG {
assert!(self.outer.left <= self.inner.left, "Expected outer.left ≤ inner.left");
assert!(self.inner.left <= self.inner.right, "Expected inner.left ≤ inner.right");
assert!(self.inner.right <= self.outer.right, "Expected inner.right ≤ outer.right");
assert!(self.outer.top <= self.inner.top, "Expected outer.top ≤ inner.top");
assert!(self.inner.top <= self.inner.bottom, "Expected inner.top ≤ inner.bottom");
assert!(self.inner.bottom <= self.outer.bottom, "Expected inner.bottom ≤ outer.bottom");
}
ValidDimensions(*self)
}
}
impl<S: Scalar> TryFrom<Dimensions<S>> for ValidDimensions<S> {
type Error = Error;
fn try_from(value: Dimensions<S>) -> Result<Self, Error> {
value.validate()
}
}
impl<S: Scalar> TryFrom<&Dimensions<S>> for ValidDimensions<S> {
type Error = Error;
fn try_from(value: &Dimensions<S>) -> Result<Self, Error> {
value.validate()
}
}
impl<S: Scalar> ValidDimensions<S> {
#[must_use] pub fn outer(&self) -> ValidRect<S> { self.outer.debug_assert_valid() }
#[must_use] pub fn inner(&self) -> ValidRect<S> { self.inner.debug_assert_valid() }
#[must_use] pub fn borders(&self) -> Rect<S> {
Rect {
left: self.inner.left - self.outer.left,
right: self.outer.right - self.inner.right,
top: self.inner.top - self.outer.top,
bottom: self.outer.bottom - self.inner.bottom,
}
}
#[must_use] pub fn with_outer(&self, outer: impl Into<ValidRect<S>>) -> Result<Self, Error> {
let borders = self.borders();
let outer = outer.into().validate()?;
if borders.left + borders.right > outer.width() { return err("Resulting dimensions would have a negative center width"); }
if borders.top + borders.bottom > outer.height() { return err("Resulting dimensions would have a negative center height"); }
Ok(Dimensions {
inner: outer.shrink(&borders),
outer: *outer,
}.debug_assert_valid())
}
#[must_use] pub fn with_inner(&self, inner: impl Into<ValidRect<S>>) -> Self {
let inner = inner.into();
let borders = self.borders();
Dimensions {
inner: *inner,
outer: inner.grow(&borders),
}.debug_assert_valid()
}
}
#[test] fn dims_int_test() {
use std::mem::swap;
let mut slice = Dimensions {
outer: [0..10, 0..100].into(),
inner: [1.. 8, 10..80].into(),
};
assert_eq!(slice.validate().unwrap().borders(), Rect { left: 1, right: 2, top: 10, bottom: 20 });
assert_eq!(slice.validate().unwrap().outer(), Rect::from([0..10, 0..100]));
assert_eq!(slice.validate().unwrap().inner(), Rect::from([1.. 8, 10..80]));
assert!(slice.validate().is_ok());
swap(&mut slice.outer, &mut slice.inner);
assert!(slice.validate().is_err());
swap(&mut slice.outer, &mut slice.inner);
assert!(slice.validate().is_ok());
}
#[test] fn dims_f32_test() {
use std::mem::swap;
use std::f32::NAN;
let mut slice = Dimensions {
outer: [0.0..10.0, 0.0..100.0].into(),
inner: [1.0.. 8.0, 10.0..80.0].into(),
};
assert_eq!(slice.validate().unwrap().borders(), Rect { left: 1.0, right: 2.0, top: 10.0, bottom: 20.0 });
assert_eq!(slice.validate().unwrap().outer(), Rect::from([0.0..10.0, 0.0..100.0]));
assert_eq!(slice.validate().unwrap().inner(), Rect::from([1.0.. 8.0, 10.0..80.0]));
assert!(slice.validate().is_ok());
swap(&mut slice.outer, &mut slice.inner);
assert!(slice.validate().is_err());
swap(&mut slice.outer, &mut slice.inner);
assert!(slice.validate().is_ok());
slice.outer.left = NAN; assert!(slice.validate().is_err()); slice.outer.left = 0.0; assert!(slice.validate().is_ok());
slice.inner.left = NAN; assert!(slice.validate().is_err()); slice.inner.left = 1.0; assert!(slice.validate().is_ok());
slice.inner.right = NAN; assert!(slice.validate().is_err()); slice.inner.right = 8.0; assert!(slice.validate().is_ok());
slice.outer.right = NAN; assert!(slice.validate().is_err()); slice.outer.right = 10.0; assert!(slice.validate().is_ok());
slice.outer.top = NAN; assert!(slice.validate().is_err()); slice.outer.top = 0.0; assert!(slice.validate().is_ok());
slice.inner.top = NAN; assert!(slice.validate().is_err()); slice.inner.top = 10.0; assert!(slice.validate().is_ok());
slice.inner.bottom = NAN; assert!(slice.validate().is_err()); slice.inner.bottom = 80.0; assert!(slice.validate().is_ok());
slice.outer.bottom = NAN; assert!(slice.validate().is_err()); slice.outer.bottom = 100.0; assert!(slice.validate().is_ok());
}