85 lines
2.1 KiB
Rust
85 lines
2.1 KiB
Rust
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/// A terminal color.
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#[derive(Clone, Copy, PartialEq, Eq, Hash, Debug)]
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pub enum Color {
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/// Black.
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Black,
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/// Red.
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Red,
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/// Green.
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Green,
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/// Yellow.
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Yellow,
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/// Blue.
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Blue,
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/// Megenta.
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Magenta,
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/// Cyan.
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Cyan,
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/// White.
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White,
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/// High-intensity black.
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HiBlack,
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/// High-intensity red.
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HiRed,
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/// High-intensity green.
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HiGreen,
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/// High-intensity yellow.
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HiYellow,
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/// High-intensity blue.
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HiBlue,
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/// High-intensity megenta.
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HiMagenta,
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/// High-intensity cyan.
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HiCyan,
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/// High-intensity white.
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HiWhite,
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/// 216-color (6, 6, 6) RGB.
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Rgb(u8, u8, u8),
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/// Grayscale (max value: 24)
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Grayscale(u8),
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}
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use Color::*;
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impl Color {
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pub fn to_ansi_val(self) -> u8 {
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self.debug_check();
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match self {
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Black => 0x0,
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Red => 0x1,
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Green => 0x2,
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Yellow => 0x3,
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Blue => 0x4,
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Magenta => 0x5,
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Cyan => 0x6,
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White => 0x7,
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HiBlack => 0x8,
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HiRed => 0x9,
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HiGreen => 0xA,
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HiYellow => 0xB,
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HiBlue => 0xC,
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HiMagenta => 0xD,
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HiCyan => 0xE,
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HiWhite => 0xF,
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Rgb(r, g, b) => 16 + 36 * r + 6 * g + b,
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Grayscale(shade) => 0xE8 + shade,
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}
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}
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pub fn debug_check(self) {
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match self {
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Rgb(r, g, b) => {
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debug_assert!(r <= 5, "Red color fragment (r = {}) is out of bound. Make sure r ≤ 5.", r);
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debug_assert!(g <= 5, "Green color fragment (g = {}) is out of bound. Make sure g ≤ 5.", g);
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debug_assert!(b <= 5, "Blue color fragment (b = {}) is out of bound. Make sure b ≤ 5.", b);
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},
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Grayscale(shade) => {
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// Unfortunately, there are a little less than fifty shades.
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debug_assert!(shade < 24, "Grayscale out of bound (shade = {}). There are only 24 shades of gray.", shade);
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},
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_ => {},
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}
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}
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}
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