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use std::borrow::Borrow;
use std::convert::TryFrom;
use std::fmt::{Display, Error, Formatter};
use std::ops::Deref;
use std::str::FromStr;
use super::Class;
#[derive(Clone, PartialEq, Eq, PartialOrd, Ord, Hash, Debug)]
pub struct Id(String);
impl Id {
pub fn new<S: Borrow<str>>(id: S) -> Self {
let id = id.borrow();
Self::from_str(id).unwrap_or_else(|err| {
panic!("typed_html::types::Id: {:?} is not a valid ID: {}", id, err)
})
}
}
impl FromStr for Id {
type Err = &'static str;
fn from_str(id: &str) -> Result<Self, Self::Err> {
let mut chars = id.chars();
match chars.next() {
None => return Err("ID cannot be empty"),
Some(c) if !c.is_alphabetic() => {
return Err("ID must start with an alphabetic character")
}
_ => (),
}
for c in chars {
if !c.is_alphanumeric() && c != '_' && c != '-' && c != '.' {
return Err("ID can only contain alphanumerics, dash, dot and underscore");
}
}
Ok(Id(id.to_string()))
}
}
impl<'a> TryFrom<&'a str> for Id {
type Error = &'static str;
fn try_from(str: &'a str) -> Result<Self, Self::Error> {
Id::from_str(str)
}
}
impl From<Class> for Id {
fn from(c: Class) -> Self {
Id(c.to_string())
}
}
impl<'a> From<&'a Class> for Id {
fn from(c: &'a Class) -> Self {
Id(c.to_string())
}
}
impl Display for Id {
fn fmt(&self, f: &mut Formatter) -> Result<(), Error> {
Display::fmt(&self.0, f)
}
}
impl Deref for Id {
type Target = String;
fn deref(&self) -> &Self::Target {
&self.0
}
}