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use std::fmt;
use std::io;
use std::time::SystemTimeError;
#[derive(Debug)]
pub enum Error {
IoError(io::Error),
SystemTimeError(SystemTimeError),
TooSmallWindow(usize, usize),
UnknownWindowSize,
NotUtf8Input(Vec<u8>),
ControlCharInText(char),
}
impl fmt::Display for Error {
fn fmt(&self, f: &mut fmt::Formatter<'_>) -> fmt::Result {
use Error::*;
match self {
IoError(err) => write!(f, "{}", err),
SystemTimeError(err) => write!(f, "{}", err),
TooSmallWindow(w, h) => write!(
f,
"Screen {}x{} is too small. At least 1x3 is necessary in width x height",
w, h
),
UnknownWindowSize => write!(f, "Could not detect terminal window size"),
NotUtf8Input(seq) => {
write!(f, "Cannot handle non-UTF8 multi-byte input sequence: ")?;
for byte in seq.iter() {
write!(f, "\\x{:x}", byte)?;
}
Ok(())
}
ControlCharInText(c) => write!(f, "Invalid character for text is included: {:?}", c),
}
}
}
impl From<io::Error> for Error {
fn from(err: io::Error) -> Error {
Error::IoError(err)
}
}
impl From<SystemTimeError> for Error {
fn from(err: SystemTimeError) -> Error {
Error::SystemTimeError(err)
}
}
pub type Result<T> = std::result::Result<T, Error>;