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mod rgb;
pub use palette::Palette;
use palette::{cga, crayon};
pub use rgb::RGB;
pub mod palette;
use std::borrow::Cow;
use std::path::Path;
use std::str::FromStr;
#[derive(Clone, Debug, PartialEq, Eq)]
pub enum Mode {
SingleColor(RGB<u8>),
Color,
BlackAndWhite,
Palette {
palette: Cow<'static, Palette>,
name: Cow<'static, str>,
},
}
impl Mode {
const CGA: Self = Mode::Palette {
palette: Cow::Borrowed(cga::ALL),
name: Cow::Borrowed("CGA"),
};
const CRAYON: Self = Mode::Palette {
palette: Cow::Borrowed(crayon::ALL),
name: Cow::Borrowed("CRAYON"),
};
}
impl Default for Mode {
fn default() -> Self {
Mode::BlackAndWhite
}
}
#[derive(Debug)]
pub enum Error {
RGBParse,
PaletteTooSmall,
UnknownOption(String),
BadFile { path: String, err: std::io::Error },
}
impl std::fmt::Display for Mode {
fn fmt(&self, f: &mut std::fmt::Formatter) -> std::fmt::Result {
match self {
Mode::Palette { name, .. } => write!(f, "custom_palette_{}", name),
Mode::Color => write!(f, "color"),
Mode::SingleColor(color) => write!(f, "single_color_{:x}", color),
Mode::BlackAndWhite => write!(f, "bw"),
}
}
}
impl<'a> FromStr for Mode {
type Err = Error;
fn from_str(s: &str) -> Result<Self, Self::Err> {
Ok(match s.trim().to_ascii_uppercase().as_ref() {
"WHITE" | "BLACK" | "BW" => Mode::BlackAndWhite,
"C" | "COLOR" => Mode::Color,
"CGA" => Mode::CGA,
"CRAYON" => Mode::CRAYON,
"BLUE" => Mode::SingleColor(cga::BLUE),
"GREEN" => Mode::SingleColor(cga::GREEN),
"CYAN" => Mode::SingleColor(cga::CYAN),
"RED" => Mode::SingleColor(cga::RED),
"MAGENTA" => Mode::SingleColor(cga::MAGENTA),
"BROWN" => Mode::SingleColor(cga::BROWN),
"LIGHT_GRAY" => Mode::SingleColor(cga::LIGHT_GRAY),
"GRAY" => Mode::SingleColor(cga::GRAY),
"LIGHT_BLUE" => Mode::SingleColor(cga::LIGHT_BLUE),
"LIGHT_GREEN" => Mode::SingleColor(cga::LIGHT_GREEN),
"LIGHT_CYAN" => Mode::SingleColor(cga::LIGHT_CYAN),
"LIGHT_RED" => Mode::SingleColor(cga::LIGHT_RED),
"LIGHT_MAGENTA" => Mode::SingleColor(cga::LIGHT_MAGENTA),
"YELLOW" => Mode::SingleColor(cga::YELLOW),
_ if Path::new(s).is_file() => {
let path = s.to_string();
return match std::fs::read_to_string(s) {
Ok(contents) => Ok(Mode::Palette {
palette: palette::parse(&contents)?,
name: Cow::Owned(path),
}),
Err(err) => Err(Error::BadFile { err, path }),
};
}
_ => return Err(Error::UnknownOption(s.to_string())),
})
}
}
impl std::fmt::Display for Error {
fn fmt(&self, f: &mut std::fmt::Formatter) -> std::fmt::Result {
match self {
Error::UnknownOption(opt) => writeln!(f, "unknown color option {}", opt),
Error::PaletteTooSmall => writeln!(
f,
"user-specified palette has 0 or 1 color; must have at least two"
),
Error::RGBParse => write!(f, "could not parse to a RGB value: bad format. must be exactly six hexidecimal characters, with optional 0x prefix"),
Error::BadFile{path, err} => write!(f, "could not load color palette from file at path \"{}\": {}", path, err),
}
}
}
impl PartialEq for Error {
fn eq(&self, other: &Self) -> bool {
use self::Error::*;
match (self, other) {
(RGBParse, RGBParse) | (PaletteTooSmall, PaletteTooSmall) => true,
(UnknownOption(a), UnknownOption(b)) => a == b,
(BadFile { path: p0, err: e0 }, BadFile { path: p1, err: e1 }) => {
p0 == p1 && e0.to_string() == e1.to_string()
}
_ => false,
}
}
}
impl Eq for Error {}