1use crate::{rgb::Rgb, Color};
2
3/// Linear color gradient between two color stops
4#[derive(Debug, Clone, Copy, PartialEq, Eq)]
5pub struct Gradient {
6 /// Start Color of Gradient
7 pub start: Rgb,
8
9 /// End Color of Gradient
10 pub end: Rgb,
11}
12
13impl Gradient {
14 /// Creates a new [Gradient] with two [Rgb] colors, `start` and `end`
15 #[inline]
16 pub const fn new(start: Rgb, end: Rgb) -> Self {
17 Self { start, end }
18 }
19 pub const fn from_color_rgb(start: Color, end: Color) -> Self {
20 let start_grad = match start {
21 Color::Rgb(r, g, b) => Rgb { r, g, b },
22 _ => Rgb { r: 0, g: 0, b: 0 },
23 };
24 let end_grad = match end {
25 Color::Rgb(r, g, b) => Rgb { r, g, b },
26 _ => Rgb { r: 0, g: 0, b: 0 },
27 };
28
29 Self {
30 start: start_grad,
31 end: end_grad,
32 }
33 }
34
35 /// Computes the [Rgb] color between `start` and `end` for `t`
36 pub fn at(&self, t: f32) -> Rgb {
37 self.start.lerp(self.end, t)
38 }
39
40 /// Returns the reverse of `self`
41 #[inline]
42 pub const fn reverse(&self) -> Self {
43 Self::new(self.end, self.start)
44 }
45
46 #[allow(dead_code)]
47 pub fn build(&self, text: &str, target: TargetGround) -> String {
48 let delta = 1.0 / text.len() as f32;
49 let mut result = text.char_indices().fold(String::new(), |mut acc, (i, c)| {
50 let temp = format!(
51 "\x1B[{}m{}",
52 self.at(i as f32 * delta).ansi_color_code(target),
53 c
54 );
55 acc.push_str(&temp);
56 acc
57 });
58
59 result.push_str("\x1B[0m");
60 result
61 }
62}
63
64#[allow(dead_code)]
65pub fn build_all_gradient_text(text: &str, foreground: Gradient, background: Gradient) -> String {
66 let delta: f32 = 1.0 / text.len() as f32;
67 let mut result: String = text.char_indices().fold(init:String::new(), |mut acc: String, (i: usize, c: char)| {
68 let step: f32 = i as f32 * delta;
69 let temp: String = format!(
70 "\x1B[{};{}m{}",
71 foreground
72 .at(step)
73 .ansi_color_code(TargetGround::Foreground),
74 background
75 .at(step)
76 .ansi_color_code(TargetGround::Background),
77 c
78 );
79 acc.push_str(&temp);
80 acc
81 });
82
83 result.push_str(string:"\x1B[0m");
84 result
85}
86
87#[derive(Debug, Clone, Copy, PartialEq, Eq)]
88pub enum TargetGround {
89 Foreground,
90 Background,
91}
92
93impl TargetGround {
94 #[inline]
95 pub const fn code(&self) -> u8 {
96 match self {
97 Self::Foreground => 30,
98 Self::Background => 40,
99 }
100 }
101}
102
103pub trait ANSIColorCode {
104 fn ansi_color_code(&self, target: TargetGround) -> String;
105}
106