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use std::path::Path;
use std::str::FromStr;
use once_cell::sync::Lazy;
use regex::Regex;
use crate::common::{Codepoint, CodepointIter, UcdFile, UcdFileByCodepoint};
use crate::error::Error;
/// A single row in the `Jamo.txt` file.
///
/// The `Jamo.txt` file defines the `Jamo_Short_Name` property.
#[derive(Clone, Debug, Default, Eq, PartialEq)]
pub struct JamoShortName {
/// The codepoint corresponding to this row.
pub codepoint: Codepoint,
/// The actual "Jamo Short Name." This string contains at most 3 bytes and
/// may be empty.
pub name: String,
}
impl UcdFile for JamoShortName {
fn relative_file_path() -> &'static Path {
Path::new("Jamo.txt")
}
}
impl UcdFileByCodepoint for JamoShortName {
fn codepoints(&self) -> CodepointIter {
self.codepoint.into_iter()
}
}
impl FromStr for JamoShortName {
type Err = Error;
fn from_str(line: &str) -> Result<JamoShortName, Error> {
static PARTS: Lazy<Regex> = Lazy::new(|| {
Regex::new(
r"(?x)
^
(?P<codepoint>[A-Z0-9]+);
\s*
(?P<name>[A-Z]*)
",
)
.unwrap()
});
let caps = match PARTS.captures(line.trim()) {
Some(caps) => caps,
None => return err!("invalid Jamo_Short_name line"),
};
Ok(JamoShortName {
codepoint: caps["codepoint"].parse()?,
name: caps.name("name").unwrap().as_str().to_string(),
})
}
}
#[cfg(test)]
mod tests {
use super::JamoShortName;
#[test]
fn parse1() {
let line = "1164; YAE # HANGUL JUNGSEONG YAE\n";
let row: JamoShortName = line.parse().unwrap();
assert_eq!(row.codepoint, 0x1164);
assert_eq!(row.name, "YAE");
}
#[test]
fn parse2() {
let line = "110B; # HANGUL CHOSEONG IEUNG\n";
let row: JamoShortName = line.parse().unwrap();
assert_eq!(row.codepoint, 0x110B);
assert_eq!(row.name, "");
}
}
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