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use std::convert::TryFrom;
use std::fmt;
use json::JsonValue;
use crate::util::AsJson;
#[derive(Clone, Copy, PartialEq, Eq, PartialOrd, Ord, Hash, Debug)]
pub enum Direction {
Ltr,
Rtl
}
impl<'a> TryFrom<&'a str> for Direction {
type Error = &'a str;
fn try_from(name: &'a str) -> Result<Direction, &'a str> {
match name {
"ltr" => Ok(Direction::Ltr),
"rtl" => Ok(Direction::Rtl),
_ => Err(name)
}
}
}
impl fmt::Display for Direction {
fn fmt(&self, f: &mut fmt::Formatter) -> fmt::Result {
match self {
Direction::Ltr => write!(f, "ltr"),
Direction::Rtl => write!(f, "rtl")
}
}
}
impl AsJson for Direction {
fn as_json(&self) -> JsonValue {
match self {
Direction::Ltr => "ltr".into(),
Direction::Rtl => "rtl".into()
}
}
}