1use core::fmt::Debug;
2use derive_more::{Add, AddAssign, Div, Mul, Sub, SubAssign};
3use refineable::Refineable;
4use std::ops::{Add, AddAssign, Div, Mul, MulAssign, Sub, SubAssign};
5
6#[derive(Refineable, Default, Add, AddAssign, Sub, SubAssign, Copy, Debug, PartialEq, Eq, Hash)]
7#[refineable(debug)]
8#[repr(C)]
9pub struct Point<T: Clone + Debug> {
10 pub x: T,
11 pub y: T,
12}
13
14pub fn point<T: Clone + Debug>(x: T, y: T) -> Point<T> {
15 Point { x, y }
16}
17
18impl<T: Clone + Debug> Point<T> {
19 pub fn new(x: T, y: T) -> Self {
20 Self { x, y }
21 }
22
23 pub fn map<U: Clone + Debug, F: Fn(T) -> U>(&self, f: F) -> Point<U> {
24 Point {
25 x: f(self.x.clone()),
26 y: f(self.y.clone()),
27 }
28 }
29}
30
31impl Point<Pixels> {
32 pub fn scale(&self, factor: f32) -> Point<ScaledPixels> {
33 Point {
34 x: self.x.scale(factor),
35 y: self.y.scale(factor),
36 }
37 }
38}
39
40impl<T, Rhs> Mul<Rhs> for Point<T>
41where
42 T: Mul<Rhs, Output = T> + Clone + Debug,
43 Rhs: Clone + Debug,
44{
45 type Output = Point<T>;
46
47 fn mul(self, rhs: Rhs) -> Self::Output {
48 Point {
49 x: self.x * rhs.clone(),
50 y: self.y * rhs,
51 }
52 }
53}
54
55impl<T: Clone + Debug + Mul<S, Output = T>, S: Clone> MulAssign<S> for Point<T> {
56 fn mul_assign(&mut self, rhs: S) {
57 self.x = self.x.clone() * rhs.clone();
58 self.y = self.y.clone() * rhs;
59 }
60}
61
62impl<T: Clone + Debug + Sub<Output = T>> SubAssign<Size<T>> for Point<T> {
63 fn sub_assign(&mut self, rhs: Size<T>) {
64 self.x = self.x.clone() - rhs.width;
65 self.y = self.y.clone() - rhs.height;
66 }
67}
68
69impl<T: Clone + Debug + Add<Output = T> + Copy> AddAssign<T> for Point<T> {
70 fn add_assign(&mut self, rhs: T) {
71 self.x = self.x.clone() + rhs;
72 self.y = self.y.clone() + rhs;
73 }
74}
75
76impl<T: Clone + Debug + Div<S, Output = T>, S: Clone> Div<S> for Point<T> {
77 type Output = Self;
78
79 fn div(self, rhs: S) -> Self::Output {
80 Self {
81 x: self.x / rhs.clone(),
82 y: self.y / rhs,
83 }
84 }
85}
86
87impl<T: Clone + Debug + std::cmp::PartialOrd> Point<T> {
88 pub fn max(&self, other: &Self) -> Self {
89 Point {
90 x: if self.x >= other.x {
91 self.x.clone()
92 } else {
93 other.x.clone()
94 },
95 y: if self.y >= other.y {
96 self.y.clone()
97 } else {
98 other.y.clone()
99 },
100 }
101 }
102}
103
104impl<T: Clone + Debug> Clone for Point<T> {
105 fn clone(&self) -> Self {
106 Self {
107 x: self.x.clone(),
108 y: self.y.clone(),
109 }
110 }
111}
112
113#[derive(Refineable, Default, Clone, Copy, Debug, PartialEq, Div, Hash)]
114#[refineable(debug)]
115#[repr(C)]
116pub struct Size<T: Clone + Debug> {
117 pub width: T,
118 pub height: T,
119}
120
121pub fn size<T: Clone + Debug>(width: T, height: T) -> Size<T> {
122 Size { width, height }
123}
124
125impl<T: Clone + Debug> Size<T> {
126 pub fn map<U: Clone + Debug, F: Fn(T) -> U>(&self, f: F) -> Size<U> {
127 Size {
128 width: f(self.width.clone()),
129 height: f(self.height.clone()),
130 }
131 }
132}
133
134impl Size<Pixels> {
135 pub fn scale(&self, factor: f32) -> Size<ScaledPixels> {
136 Size {
137 width: self.width.scale(factor),
138 height: self.height.scale(factor),
139 }
140 }
141}
142
143impl<T: Clone + Debug + Ord> Size<T> {
144 pub fn max(&self, other: &Self) -> Self {
145 Size {
146 width: if self.width >= other.width {
147 self.width.clone()
148 } else {
149 other.width.clone()
150 },
151 height: if self.height >= other.height {
152 self.height.clone()
153 } else {
154 other.height.clone()
155 },
156 }
157 }
158}
159
160impl<T, Rhs> Mul<Rhs> for Size<T>
161where
162 T: Mul<Rhs, Output = Rhs> + Debug + Clone,
163 Rhs: Debug + Clone,
164{
165 type Output = Size<Rhs>;
166
167 fn mul(self, rhs: Rhs) -> Self::Output {
168 Size {
169 width: self.width * rhs.clone(),
170 height: self.height * rhs,
171 }
172 }
173}
174
175impl<T: Clone + Debug + Mul<S, Output = T>, S: Clone> MulAssign<S> for Size<T> {
176 fn mul_assign(&mut self, rhs: S) {
177 self.width = self.width.clone() * rhs.clone();
178 self.height = self.height.clone() * rhs;
179 }
180}
181
182impl<T: Eq + Debug + Clone> Eq for Size<T> {}
183
184impl From<Size<Option<Pixels>>> for Size<Option<f32>> {
185 fn from(size: Size<Option<Pixels>>) -> Self {
186 Size {
187 width: size.width.map(|p| p.0 as f32),
188 height: size.height.map(|p| p.0 as f32),
189 }
190 }
191}
192
193impl Size<Length> {
194 pub fn full() -> Self {
195 Self {
196 width: relative(1.).into(),
197 height: relative(1.).into(),
198 }
199 }
200}
201
202impl Size<DefiniteLength> {
203 pub fn zero() -> Self {
204 Self {
205 width: px(0.).into(),
206 height: px(0.).into(),
207 }
208 }
209}
210
211impl Size<Length> {
212 pub fn auto() -> Self {
213 Self {
214 width: Length::Auto,
215 height: Length::Auto,
216 }
217 }
218}
219
220#[derive(Refineable, Clone, Default, Debug, Eq, PartialEq)]
221#[refineable(debug)]
222#[repr(C)]
223pub struct Bounds<T: Clone + Debug> {
224 pub origin: Point<T>,
225 pub size: Size<T>,
226}
227
228impl<T: Clone + Debug + Sub<Output = T>> Bounds<T> {
229 pub fn from_corners(upper_left: Point<T>, lower_right: Point<T>) -> Self {
230 let origin = Point {
231 x: upper_left.x.clone(),
232 y: upper_left.y.clone(),
233 };
234 let size = Size {
235 width: lower_right.x - upper_left.x,
236 height: lower_right.y - upper_left.y,
237 };
238 Bounds { origin, size }
239 }
240}
241
242impl<T, Rhs> Mul<Rhs> for Bounds<T>
243where
244 T: Mul<Rhs, Output = Rhs> + Clone + Debug,
245 Point<T>: Mul<Rhs, Output = Point<Rhs>>,
246 Rhs: Clone + Debug,
247{
248 type Output = Bounds<Rhs>;
249
250 fn mul(self, rhs: Rhs) -> Self::Output {
251 Bounds {
252 origin: self.origin * rhs.clone(),
253 size: self.size * rhs,
254 }
255 }
256}
257
258impl<T: Clone + Debug + Mul<S, Output = T>, S: Clone> MulAssign<S> for Bounds<T> {
259 fn mul_assign(&mut self, rhs: S) {
260 self.origin *= rhs.clone();
261 self.size *= rhs;
262 }
263}
264
265impl<T: Clone + Debug + Div<S, Output = T>, S: Clone> Div<S> for Bounds<T>
266where
267 Size<T>: Div<S, Output = Size<T>>,
268{
269 type Output = Self;
270
271 fn div(self, rhs: S) -> Self {
272 Self {
273 origin: self.origin / rhs.clone(),
274 size: self.size / rhs,
275 }
276 }
277}
278
279impl<T: Clone + Debug + Add<T, Output = T>> Bounds<T> {
280 pub fn upper_right(&self) -> Point<T> {
281 Point {
282 x: self.origin.x.clone() + self.size.width.clone(),
283 y: self.origin.y.clone(),
284 }
285 }
286
287 pub fn lower_right(&self) -> Point<T> {
288 Point {
289 x: self.origin.x.clone() + self.size.width.clone(),
290 y: self.origin.y.clone() + self.size.height.clone(),
291 }
292 }
293}
294
295impl<T: Clone + Debug + PartialOrd + Add<T, Output = T>> Bounds<T> {
296 pub fn contains_point(&self, point: Point<T>) -> bool {
297 point.x >= self.origin.x
298 && point.x <= self.origin.x.clone() + self.size.width.clone()
299 && point.y >= self.origin.y
300 && point.y <= self.origin.y.clone() + self.size.height.clone()
301 }
302
303 pub fn map<U: Clone + Debug, F: Fn(T) -> U>(&self, f: F) -> Bounds<U> {
304 Bounds {
305 origin: self.origin.map(&f),
306 size: self.size.map(f),
307 }
308 }
309}
310
311impl Bounds<Pixels> {
312 pub fn scale(&self, factor: f32) -> Bounds<ScaledPixels> {
313 Bounds {
314 origin: self.origin.scale(factor),
315 size: self.size.scale(factor),
316 }
317 }
318}
319
320impl<T: Clone + Debug + Copy> Copy for Bounds<T> {}
321
322#[derive(Refineable, Clone, Default, Debug, Eq, PartialEq)]
323#[refineable(debug)]
324#[repr(C)]
325pub struct Edges<T: Clone + Debug> {
326 pub top: T,
327 pub right: T,
328 pub bottom: T,
329 pub left: T,
330}
331
332impl<T: Clone + Debug + Mul<Output = T>> Mul for Edges<T> {
333 type Output = Self;
334
335 fn mul(self, rhs: Self) -> Self::Output {
336 Self {
337 top: self.top.clone() * rhs.top,
338 right: self.right.clone() * rhs.right,
339 bottom: self.bottom.clone() * rhs.bottom,
340 left: self.left.clone() * rhs.left,
341 }
342 }
343}
344
345impl<T: Clone + Debug + Mul<S, Output = T>, S: Clone> MulAssign<S> for Edges<T> {
346 fn mul_assign(&mut self, rhs: S) {
347 self.top = self.top.clone() * rhs.clone();
348 self.right = self.right.clone() * rhs.clone();
349 self.bottom = self.bottom.clone() * rhs.clone();
350 self.left = self.left.clone() * rhs.clone();
351 }
352}
353
354impl<T: Clone + Debug + Copy> Copy for Edges<T> {}
355
356impl<T: Clone + Debug> Edges<T> {
357 pub fn map<U: Clone + Debug, F: Fn(&T) -> U>(&self, f: F) -> Edges<U> {
358 Edges {
359 top: f(&self.top),
360 right: f(&self.right),
361 bottom: f(&self.bottom),
362 left: f(&self.left),
363 }
364 }
365
366 pub fn any<F: Fn(&T) -> bool>(&self, predicate: F) -> bool {
367 predicate(&self.top)
368 || predicate(&self.right)
369 || predicate(&self.bottom)
370 || predicate(&self.left)
371 }
372}
373
374impl Edges<Length> {
375 pub fn auto() -> Self {
376 Self {
377 top: Length::Auto,
378 right: Length::Auto,
379 bottom: Length::Auto,
380 left: Length::Auto,
381 }
382 }
383
384 pub fn zero() -> Self {
385 Self {
386 top: px(0.).into(),
387 right: px(0.).into(),
388 bottom: px(0.).into(),
389 left: px(0.).into(),
390 }
391 }
392}
393
394impl Edges<DefiniteLength> {
395 pub fn zero() -> Self {
396 Self {
397 top: px(0.).into(),
398 right: px(0.).into(),
399 bottom: px(0.).into(),
400 left: px(0.).into(),
401 }
402 }
403}
404
405impl Edges<AbsoluteLength> {
406 pub fn zero() -> Self {
407 Self {
408 top: px(0.).into(),
409 right: px(0.).into(),
410 bottom: px(0.).into(),
411 left: px(0.).into(),
412 }
413 }
414
415 pub fn to_pixels(&self, rem_size: Pixels) -> Edges<Pixels> {
416 Edges {
417 top: self.top.to_pixels(rem_size),
418 right: self.right.to_pixels(rem_size),
419 bottom: self.bottom.to_pixels(rem_size),
420 left: self.left.to_pixels(rem_size),
421 }
422 }
423}
424
425#[derive(Refineable, Clone, Default, Debug, Eq, PartialEq)]
426#[refineable(debug)]
427#[repr(C)]
428pub struct Corners<T: Clone + Debug> {
429 pub top_left: T,
430 pub top_right: T,
431 pub bottom_right: T,
432 pub bottom_left: T,
433}
434
435impl Corners<AbsoluteLength> {
436 pub fn to_pixels(&self, rem_size: Pixels) -> Corners<Pixels> {
437 Corners {
438 top_left: self.top_left.to_pixels(rem_size),
439 top_right: self.top_right.to_pixels(rem_size),
440 bottom_right: self.bottom_right.to_pixels(rem_size),
441 bottom_left: self.bottom_left.to_pixels(rem_size),
442 }
443 }
444}
445
446impl Corners<Pixels> {
447 pub fn scale(&self, factor: f32) -> Corners<ScaledPixels> {
448 Corners {
449 top_left: self.top_left.scale(factor),
450 top_right: self.top_right.scale(factor),
451 bottom_right: self.bottom_right.scale(factor),
452 bottom_left: self.bottom_left.scale(factor),
453 }
454 }
455}
456
457impl<T: Clone + Debug> Corners<T> {
458 pub fn map<U: Clone + Debug, F: Fn(&T) -> U>(&self, f: F) -> Corners<U> {
459 Corners {
460 top_left: f(&self.top_left),
461 top_right: f(&self.top_right),
462 bottom_right: f(&self.bottom_right),
463 bottom_left: f(&self.bottom_left),
464 }
465 }
466}
467
468impl<T: Clone + Debug + Mul<Output = T>> Mul for Corners<T> {
469 type Output = Self;
470
471 fn mul(self, rhs: Self) -> Self::Output {
472 Self {
473 top_left: self.top_left.clone() * rhs.top_left,
474 top_right: self.top_right.clone() * rhs.top_right,
475 bottom_right: self.bottom_right.clone() * rhs.bottom_right,
476 bottom_left: self.bottom_left.clone() * rhs.bottom_left,
477 }
478 }
479}
480
481impl<T: Clone + Debug + Mul<S, Output = T>, S: Clone> MulAssign<S> for Corners<T> {
482 fn mul_assign(&mut self, rhs: S) {
483 self.top_left = self.top_left.clone() * rhs.clone();
484 self.top_right = self.top_right.clone() * rhs.clone();
485 self.bottom_right = self.bottom_right.clone() * rhs.clone();
486 self.bottom_left = self.bottom_left.clone() * rhs;
487 }
488}
489
490impl<T: Clone + Debug + Copy> Copy for Corners<T> {}
491
492#[derive(Clone, Copy, Default, Add, AddAssign, Sub, SubAssign, Div, PartialEq, PartialOrd)]
493#[repr(transparent)]
494pub struct Pixels(pub(crate) f32);
495
496impl Mul<f32> for Pixels {
497 type Output = Pixels;
498
499 fn mul(self, other: f32) -> Pixels {
500 Pixels(self.0 * other)
501 }
502}
503
504impl Mul<Pixels> for f32 {
505 type Output = Pixels;
506
507 fn mul(self, rhs: Pixels) -> Self::Output {
508 Pixels(self * rhs.0)
509 }
510}
511
512impl MulAssign<f32> for Pixels {
513 fn mul_assign(&mut self, other: f32) {
514 self.0 *= other;
515 }
516}
517
518impl Pixels {
519 pub fn round(&self) -> Self {
520 Self(self.0.round())
521 }
522
523 pub fn scale(&self, factor: f32) -> ScaledPixels {
524 ScaledPixels(self.0 * factor)
525 }
526}
527
528impl Mul<Pixels> for Pixels {
529 type Output = Pixels;
530
531 fn mul(self, rhs: Pixels) -> Self::Output {
532 Pixels(self.0 * rhs.0)
533 }
534}
535
536impl Eq for Pixels {}
537
538impl Ord for Pixels {
539 fn cmp(&self, other: &Self) -> std::cmp::Ordering {
540 self.0.partial_cmp(&other.0).unwrap()
541 }
542}
543
544impl std::hash::Hash for Pixels {
545 fn hash<H: std::hash::Hasher>(&self, state: &mut H) {
546 self.0.to_bits().hash(state);
547 }
548}
549
550impl From<f64> for Pixels {
551 fn from(pixels: f64) -> Self {
552 Pixels(pixels as f32)
553 }
554}
555
556impl From<f32> for Pixels {
557 fn from(pixels: f32) -> Self {
558 Pixels(pixels)
559 }
560}
561
562impl Debug for Pixels {
563 fn fmt(&self, f: &mut std::fmt::Formatter<'_>) -> std::fmt::Result {
564 write!(f, "{} px", self.0)
565 }
566}
567
568impl From<Pixels> for f32 {
569 fn from(pixels: Pixels) -> Self {
570 pixels.0
571 }
572}
573
574impl From<&Pixels> for f32 {
575 fn from(pixels: &Pixels) -> Self {
576 pixels.0
577 }
578}
579
580impl From<Pixels> for f64 {
581 fn from(pixels: Pixels) -> Self {
582 pixels.0 as f64
583 }
584}
585
586#[derive(
587 Add, AddAssign, Clone, Copy, Default, Div, Eq, Hash, Ord, PartialEq, PartialOrd, Sub, SubAssign,
588)]
589#[repr(transparent)]
590pub struct DevicePixels(pub(crate) i32);
591
592impl DevicePixels {
593 pub fn to_bytes(&self, bytes_per_pixel: u8) -> u32 {
594 self.0 as u32 * bytes_per_pixel as u32
595 }
596}
597
598impl std::fmt::Debug for DevicePixels {
599 fn fmt(&self, f: &mut std::fmt::Formatter<'_>) -> std::fmt::Result {
600 write!(f, "{} px (device)", self.0)
601 }
602}
603
604impl From<DevicePixels> for i32 {
605 fn from(device_pixels: DevicePixels) -> Self {
606 device_pixels.0
607 }
608}
609
610impl From<i32> for DevicePixels {
611 fn from(device_pixels: i32) -> Self {
612 DevicePixels(device_pixels)
613 }
614}
615
616impl From<u32> for DevicePixels {
617 fn from(device_pixels: u32) -> Self {
618 DevicePixels(device_pixels as i32)
619 }
620}
621
622impl From<DevicePixels> for u32 {
623 fn from(device_pixels: DevicePixels) -> Self {
624 device_pixels.0 as u32
625 }
626}
627
628impl From<DevicePixels> for u64 {
629 fn from(device_pixels: DevicePixels) -> Self {
630 device_pixels.0 as u64
631 }
632}
633
634impl From<u64> for DevicePixels {
635 fn from(device_pixels: u64) -> Self {
636 DevicePixels(device_pixels as i32)
637 }
638}
639
640#[derive(Clone, Copy, Default, Add, AddAssign, Sub, SubAssign, Div, PartialEq, PartialOrd)]
641#[repr(transparent)]
642pub struct ScaledPixels(pub(crate) f32);
643
644impl ScaledPixels {
645 pub fn floor(&self) -> Self {
646 Self(self.0.floor())
647 }
648}
649
650impl Eq for ScaledPixels {}
651
652impl Debug for ScaledPixels {
653 fn fmt(&self, f: &mut std::fmt::Formatter<'_>) -> std::fmt::Result {
654 write!(f, "{} px (scaled)", self.0)
655 }
656}
657
658impl From<ScaledPixels> for DevicePixels {
659 fn from(scaled: ScaledPixels) -> Self {
660 DevicePixels(scaled.0.ceil() as i32)
661 }
662}
663
664impl From<DevicePixels> for ScaledPixels {
665 fn from(device: DevicePixels) -> Self {
666 ScaledPixels(device.0 as f32)
667 }
668}
669
670#[derive(Clone, Copy, Default, Add, Sub, Mul, Div)]
671pub struct Rems(f32);
672
673impl Mul<Pixels> for Rems {
674 type Output = Pixels;
675
676 fn mul(self, other: Pixels) -> Pixels {
677 Pixels(self.0 * other.0)
678 }
679}
680
681impl Debug for Rems {
682 fn fmt(&self, f: &mut std::fmt::Formatter<'_>) -> std::fmt::Result {
683 write!(f, "{} rem", self.0)
684 }
685}
686
687#[derive(Clone, Copy, Debug)]
688pub enum AbsoluteLength {
689 Pixels(Pixels),
690 Rems(Rems),
691}
692
693impl AbsoluteLength {
694 pub fn is_zero(&self) -> bool {
695 match self {
696 AbsoluteLength::Pixels(px) => px.0 == 0.,
697 AbsoluteLength::Rems(rems) => rems.0 == 0.,
698 }
699 }
700}
701
702impl From<Pixels> for AbsoluteLength {
703 fn from(pixels: Pixels) -> Self {
704 AbsoluteLength::Pixels(pixels)
705 }
706}
707
708impl From<Rems> for AbsoluteLength {
709 fn from(rems: Rems) -> Self {
710 AbsoluteLength::Rems(rems)
711 }
712}
713
714impl AbsoluteLength {
715 pub fn to_pixels(&self, rem_size: Pixels) -> Pixels {
716 match self {
717 AbsoluteLength::Pixels(pixels) => *pixels,
718 AbsoluteLength::Rems(rems) => *rems * rem_size,
719 }
720 }
721}
722
723impl Default for AbsoluteLength {
724 fn default() -> Self {
725 px(0.).into()
726 }
727}
728
729/// A non-auto length that can be defined in pixels, rems, or percent of parent.
730#[derive(Clone, Copy)]
731pub enum DefiniteLength {
732 Absolute(AbsoluteLength),
733 /// A fraction of the parent's size between 0 and 1.
734 Fraction(f32),
735}
736
737impl DefiniteLength {
738 pub fn to_pixels(&self, base_size: AbsoluteLength, rem_size: Pixels) -> Pixels {
739 match self {
740 DefiniteLength::Absolute(size) => size.to_pixels(rem_size),
741 DefiniteLength::Fraction(fraction) => match base_size {
742 AbsoluteLength::Pixels(px) => px * *fraction,
743 AbsoluteLength::Rems(rems) => rems * rem_size * *fraction,
744 },
745 }
746 }
747}
748
749impl Debug for DefiniteLength {
750 fn fmt(&self, f: &mut std::fmt::Formatter<'_>) -> std::fmt::Result {
751 match self {
752 DefiniteLength::Absolute(length) => Debug::fmt(length, f),
753 DefiniteLength::Fraction(fract) => write!(f, "{}%", (fract * 100.0) as i32),
754 }
755 }
756}
757
758impl From<Pixels> for DefiniteLength {
759 fn from(pixels: Pixels) -> Self {
760 Self::Absolute(pixels.into())
761 }
762}
763
764impl From<Rems> for DefiniteLength {
765 fn from(rems: Rems) -> Self {
766 Self::Absolute(rems.into())
767 }
768}
769
770impl From<AbsoluteLength> for DefiniteLength {
771 fn from(length: AbsoluteLength) -> Self {
772 Self::Absolute(length)
773 }
774}
775
776impl Default for DefiniteLength {
777 fn default() -> Self {
778 Self::Absolute(AbsoluteLength::default())
779 }
780}
781
782/// A length that can be defined in pixels, rems, percent of parent, or auto.
783#[derive(Clone, Copy)]
784pub enum Length {
785 Definite(DefiniteLength),
786 Auto,
787}
788
789impl Debug for Length {
790 fn fmt(&self, f: &mut std::fmt::Formatter<'_>) -> std::fmt::Result {
791 match self {
792 Length::Definite(definite_length) => write!(f, "{:?}", definite_length),
793 Length::Auto => write!(f, "auto"),
794 }
795 }
796}
797
798pub fn relative(fraction: f32) -> DefiniteLength {
799 DefiniteLength::Fraction(fraction).into()
800}
801
802/// Returns the Golden Ratio, i.e. `~(1.0 + sqrt(5.0)) / 2.0`.
803pub fn phi() -> DefiniteLength {
804 relative(1.61803398875)
805}
806
807pub fn rems(rems: f32) -> Rems {
808 Rems(rems)
809}
810
811pub fn px(pixels: f32) -> Pixels {
812 Pixels(pixels)
813}
814
815pub fn auto() -> Length {
816 Length::Auto
817}
818
819impl From<Pixels> for Length {
820 fn from(pixels: Pixels) -> Self {
821 Self::Definite(pixels.into())
822 }
823}
824
825impl From<Rems> for Length {
826 fn from(rems: Rems) -> Self {
827 Self::Definite(rems.into())
828 }
829}
830
831impl From<DefiniteLength> for Length {
832 fn from(length: DefiniteLength) -> Self {
833 Self::Definite(length)
834 }
835}
836
837impl From<AbsoluteLength> for Length {
838 fn from(length: AbsoluteLength) -> Self {
839 Self::Definite(length.into())
840 }
841}
842
843impl Default for Length {
844 fn default() -> Self {
845 Self::Definite(DefiniteLength::default())
846 }
847}
848
849impl From<()> for Length {
850 fn from(_: ()) -> Self {
851 Self::Definite(DefiniteLength::default())
852 }
853}
854
855pub trait IsZero {
856 fn is_zero(&self) -> bool;
857}
858
859impl IsZero for DevicePixels {
860 fn is_zero(&self) -> bool {
861 self.0 == 0
862 }
863}
864
865impl IsZero for ScaledPixels {
866 fn is_zero(&self) -> bool {
867 self.0 == 0.
868 }
869}
870
871impl IsZero for Pixels {
872 fn is_zero(&self) -> bool {
873 self.0 == 0.
874 }
875}
876
877impl IsZero for Rems {
878 fn is_zero(&self) -> bool {
879 self.0 == 0.
880 }
881}
882
883impl IsZero for AbsoluteLength {
884 fn is_zero(&self) -> bool {
885 match self {
886 AbsoluteLength::Pixels(pixels) => pixels.is_zero(),
887 AbsoluteLength::Rems(rems) => rems.is_zero(),
888 }
889 }
890}
891
892impl IsZero for DefiniteLength {
893 fn is_zero(&self) -> bool {
894 match self {
895 DefiniteLength::Absolute(length) => length.is_zero(),
896 DefiniteLength::Fraction(fraction) => *fraction == 0.,
897 }
898 }
899}
900
901impl IsZero for Length {
902 fn is_zero(&self) -> bool {
903 match self {
904 Length::Definite(length) => length.is_zero(),
905 Length::Auto => false,
906 }
907 }
908}
909
910impl<T: IsZero + Debug + Clone> IsZero for Point<T> {
911 fn is_zero(&self) -> bool {
912 self.x.is_zero() && self.y.is_zero()
913 }
914}
915
916impl<T: IsZero + Debug + Clone> IsZero for Size<T> {
917 fn is_zero(&self) -> bool {
918 self.width.is_zero() || self.height.is_zero()
919 }
920}
921
922impl<T: IsZero + Debug + Clone> IsZero for Bounds<T> {
923 fn is_zero(&self) -> bool {
924 self.origin.is_zero() && self.size.is_zero()
925 }
926}