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extern crate serde; #[macro_use] extern crate serde_derive; pub enum Error { RangeError(u8), } pub type Result<T> = ::std::result::Result<T, Error>; #[derive(Clone, Copy, Debug, PartialEq, Eq, Hash, Serialize, Deserialize)] pub enum NormalColour { Black, Red, Green, Yellow, Blue, Magenta, Cyan, Grey, } impl NormalColour { pub fn code(self) -> u8 { use self::NormalColour::*; use self::raw::normal::*; match self { Black => BLACK, Red => RED, Green => GREEN, Yellow => YELLOW, Blue => BLUE, Magenta => MAGENTA, Cyan => CYAN, Grey => GREY, } } } #[derive(Clone, Copy, Debug, PartialEq, Eq, Hash, Serialize, Deserialize)] pub enum BrightColour { DarkGrey, Red, Green, Yellow, Blue, Magenta, Cyan, White, } impl BrightColour { pub fn code(self) -> u8 { use self::BrightColour::*; use self::raw::bright::*; match self { DarkGrey => DARK_GREY, Red => RED, Green => GREEN, Yellow => YELLOW, Blue => BLUE, Magenta => MAGENTA, Cyan => CYAN, White => WHITE, } } } #[derive(Clone, Copy, Debug, PartialEq, Eq, Hash, Serialize, Deserialize)] pub struct RgbColour { red: u8, green: u8, blue: u8, } const RGB_START: u8 = 16; const RGB_MAX_FIELD: u8 = 5; const RGB_FIELD_RANGE: u8 = RGB_MAX_FIELD + 1; const RGB_COUNT: u8 = RGB_FIELD_RANGE * RGB_FIELD_RANGE * RGB_FIELD_RANGE; const RGB_END: u8 = RGB_START + RGB_COUNT - 1; const GREYSCALE_START: u8 = RGB_END + 1; const GREYSCALE_MAX_LEVEL: u8 = 23; impl RgbColour { pub fn red(self) -> u8 { self.red } pub fn green(self) -> u8 { self.green } pub fn blue(self) -> u8 { self.blue } pub fn new(red: u8, green: u8, blue: u8) -> Result<Self> { if red > RGB_MAX_FIELD { return Err(Error::RangeError(red)); } if green > RGB_MAX_FIELD { return Err(Error::RangeError(green)); } if blue > RGB_MAX_FIELD { return Err(Error::RangeError(blue)); } Ok(Self { red, green, blue }) } pub fn code(self) -> u8 { RGB_START + (RGB_FIELD_RANGE * RGB_FIELD_RANGE) * self.red + RGB_FIELD_RANGE * self.green + self.blue } } #[derive(Clone, Copy, Debug, PartialEq, Eq, Hash, Serialize, Deserialize)] pub struct GreyScaleColour(u8); impl GreyScaleColour { pub fn level(self) -> u8 { self.0 } pub fn new(level: u8) -> Result<Self> { if level > GREYSCALE_MAX_LEVEL { return Err(Error::RangeError(level)); } Ok(GreyScaleColour(level)) } pub fn code(self) -> u8 { GREYSCALE_START + self.0 } } #[derive(Clone, Copy, Debug, PartialEq, Eq, Hash, Serialize, Deserialize)] pub enum ColourVariant { Normal(NormalColour), Bright(BrightColour), Rgb(RgbColour), GreyScale(GreyScaleColour), } impl ColourVariant { pub fn code(self) -> u8 { use self::ColourVariant::*; match self { Normal(c) => c.code(), Bright(c) => c.code(), Rgb(c) => c.code(), GreyScale(c) => c.code(), } } pub fn colour(self) -> Colour { Colour(self.code()) } } #[derive(Clone, Copy, Debug, PartialEq, Eq, Hash, Serialize, Deserialize)] pub struct Colour(u8); impl Colour { pub fn greyscale(level: u8) -> Result<Self> { Ok(Colour(GreyScaleColour::new(level)?.code())) } pub fn rgb(red: u8, green: u8, blue: u8) -> Result<Self> { Ok(Colour(RgbColour::new(red, green, blue)?.code())) } pub fn normal(normal_colour: NormalColour) -> Self { Colour(normal_colour.code()) } pub fn bright(bright_colour: BrightColour) -> Self { Colour(bright_colour.code()) } pub fn code(self) -> u8 { self.0 } pub fn from_code(code: u8) -> Self { Colour(code) } pub fn typ(self) -> ColourVariant { use self::raw::*; match self.0 { normal::BLACK => ColourVariant::Normal(NormalColour::Black), normal::RED => ColourVariant::Normal(NormalColour::Red), normal::GREEN => ColourVariant::Normal(NormalColour::Green), normal::YELLOW => ColourVariant::Normal(NormalColour::Yellow), normal::BLUE => ColourVariant::Normal(NormalColour::Blue), normal::MAGENTA => ColourVariant::Normal(NormalColour::Magenta), normal::CYAN => ColourVariant::Normal(NormalColour::Cyan), normal::GREY => ColourVariant::Normal(NormalColour::Grey), bright::DARK_GREY => ColourVariant::Bright(BrightColour::DarkGrey), bright::RED => ColourVariant::Bright(BrightColour::Red), bright::GREEN => ColourVariant::Bright(BrightColour::Green), bright::YELLOW => ColourVariant::Bright(BrightColour::Yellow), bright::BLUE => ColourVariant::Bright(BrightColour::Blue), bright::MAGENTA => ColourVariant::Bright(BrightColour::Magenta), bright::CYAN => ColourVariant::Bright(BrightColour::Cyan), bright::WHITE => ColourVariant::Bright(BrightColour::White), RGB_START...RGB_END => { let zero_based = self.0 - RGB_START; let blue = zero_based % RGB_FIELD_RANGE; let zero_based = zero_based / RGB_FIELD_RANGE; let green = zero_based % RGB_FIELD_RANGE; let zero_based = zero_based / RGB_FIELD_RANGE; let red = zero_based % RGB_FIELD_RANGE; ColourVariant::Rgb(RgbColour{ red, green, blue }) } GREYSCALE_START...255 => { let zero_based = self.0 - GREYSCALE_START; ColourVariant::GreyScale(GreyScaleColour(zero_based)) } _ => unreachable!(), } } pub fn all() -> ColourIter { ColourIter::new() } } impl From<ColourVariant> for Colour { fn from(t: ColourVariant) -> Self { t.colour() } } impl From<Colour> for ColourVariant { fn from(c: Colour) -> Self { c.typ() } } impl From<Colour> for u8 { fn from(c: Colour) -> Self { c.code() } } impl From<u8> for Colour { fn from(u: u8) -> Self { Colour(u) } } pub struct ColourIter(::std::ops::Range<u16>); impl ColourIter { fn new() -> Self { ColourIter(0..256) } } impl Iterator for ColourIter { type Item = Colour; fn next(&mut self) -> Option<Self::Item> { self.0.next().map(|i| Colour(i as u8)) } } pub struct AllColours; impl IntoIterator for AllColours { type Item = Colour; type IntoIter = ColourIter; fn into_iter(self) -> Self::IntoIter { ColourIter::new() } } mod raw { pub mod normal { pub const BLACK: u8 = 0; pub const RED: u8 = 1; pub const GREEN: u8 = 2; pub const YELLOW: u8 = 3; pub const BLUE: u8 = 4; pub const MAGENTA: u8 = 5; pub const CYAN: u8 = 6; pub const GREY: u8 = 7; } pub mod bright { pub const DARK_GREY: u8 = 8; pub const RED: u8 = 9; pub const GREEN: u8 = 10; pub const YELLOW: u8 = 11; pub const BLUE: u8 = 12; pub const MAGENTA: u8 = 13; pub const CYAN: u8 = 14; pub const WHITE: u8 = 15; } } pub mod colours { use Colour; use raw; pub const BLACK: Colour = Colour(self::raw::normal::BLACK); pub const RED: Colour = Colour(self::raw::normal::RED); pub const GREEN: Colour = Colour(self::raw::normal::GREEN); pub const YELLOW: Colour = Colour(self::raw::normal::YELLOW); pub const BLUE: Colour = Colour(self::raw::normal::BLUE); pub const MAGENTA: Colour = Colour(self::raw::normal::MAGENTA); pub const CYAN: Colour = Colour(self::raw::normal::CYAN); pub const GREY: Colour = Colour(self::raw::normal::GREY); pub const DARK_GREY: Colour = Colour(self::raw::bright::DARK_GREY); pub const BRIGHT_RED: Colour = Colour(self::raw::bright::RED); pub const BRIGHT_GREEN: Colour = Colour(self::raw::bright::GREEN); pub const BRIGHT_YELLOW: Colour = Colour(self::raw::bright::YELLOW); pub const BRIGHT_BLUE: Colour = Colour(self::raw::bright::BLUE); pub const BRIGHT_MAGENTA: Colour = Colour(self::raw::bright::MAGENTA); pub const BRIGHT_CYAN: Colour = Colour(self::raw::bright::CYAN); pub const WHITE: Colour = Colour(self::raw::bright::WHITE); } #[cfg(test)] mod tests { use AllColours; #[test] fn from_colour() { for c in AllColours { c.typ(); } } #[test] fn reflexive() { for orig_c in AllColours { let orig_t = orig_c.typ(); let new_c = orig_t.colour(); let new_t = new_c.typ(); assert_eq!(orig_t, new_t); assert_eq!(orig_c, new_c); } } }