embedded_ui/
padding.rs

1use core::ops::{Add, Sub};
2
3use embedded_graphics::geometry::Point;
4
5use crate::{align::Axis, size::Size};
6
7#[derive(Clone, Copy, Default)]
8pub struct Padding {
9    pub left: u32,
10    pub right: u32,
11    pub top: u32,
12    pub bottom: u32,
13}
14
15impl Padding {
16    pub fn new(top: u32, right: u32, bottom: u32, left: u32) -> Self {
17        Self { left, right, top, bottom }
18    }
19
20    pub fn new_equal(padding: u32) -> Self {
21        Self::new(padding, padding, padding, padding)
22    }
23
24    pub fn new_axis(padding_y: u32, padding_x: u32) -> Self {
25        Self::new(padding_y, padding_x, padding_y, padding_x)
26    }
27
28    pub fn zero() -> Self {
29        Self::new_equal(0)
30    }
31
32    pub fn total_x(&self) -> u32 {
33        self.left + self.right
34    }
35
36    pub fn total_y(&self) -> u32 {
37        self.top + self.bottom
38    }
39
40    pub fn top_left(&self) -> Point {
41        Point::new(self.left as i32, self.top as i32)
42    }
43
44    pub fn total_axis(&self, axis: Axis) -> u32 {
45        match axis {
46            Axis::X => self.total_x(),
47            Axis::Y => self.total_y(),
48        }
49    }
50
51    pub fn fit(self, inner: Size, outer: Size) -> Self {
52        let free = outer - inner;
53        let fit_left = self.top.min(free.width);
54        let fit_right = self.right.min(free.width - fit_left);
55        let fit_top = self.top.min(free.height);
56        let fit_bottom = self.bottom.min(free.height - fit_top);
57
58        Self { left: fit_left, right: fit_right, top: fit_top, bottom: fit_bottom }
59    }
60}
61
62impl Into<Size> for Padding {
63    fn into(self) -> Size {
64        Size::new(self.total_x(), self.total_y())
65    }
66}
67
68impl From<u32> for Padding {
69    fn from(value: u32) -> Self {
70        Self::new_equal(value)
71    }
72}
73
74impl From<[u32; 2]> for Padding {
75    fn from(value: [u32; 2]) -> Self {
76        Self::new_axis(value[0], value[1])
77    }
78}
79
80impl From<[u32; 4]> for Padding {
81    fn from(value: [u32; 4]) -> Self {
82        Self::new(value[0], value[1], value[2], value[3])
83    }
84}
85
86impl Add for Padding {
87    type Output = Self;
88
89    fn add(self, rhs: Self) -> Self::Output {
90        Self::new(
91            self.top.saturating_add(rhs.top),
92            self.right.saturating_add(rhs.right),
93            self.bottom.saturating_add(rhs.bottom),
94            self.left.saturating_add(rhs.left),
95        )
96    }
97}
98
99impl Sub for Padding {
100    type Output = Self;
101
102    fn sub(self, rhs: Self) -> Self::Output {
103        Self::new(
104            self.top.saturating_sub(rhs.top),
105            self.right.saturating_sub(rhs.right),
106            self.bottom.saturating_sub(rhs.bottom),
107            self.left.saturating_sub(rhs.left),
108        )
109    }
110}
embedded_ui/padding.rs

embedded_ui/
padding.rs
