| use std::path::Path; |
| |
| use crate::{ |
| common::{Codepoint, CodepointIter, UcdFile, UcdFileByCodepoint}, |
| error::Error, |
| }; |
| |
| /// Represents a single row in the `BidiMirroring.txt` file. |
| /// |
| /// The field names were taken from the header of BidiMirroring.txt. |
| #[derive(Clone, Debug, Default, Eq, PartialEq)] |
| pub struct BidiMirroring { |
| /// The codepoint corresponding to this row. |
| pub codepoint: Codepoint, |
| /// The codepoint that has typically has a glyph that is the mirror image |
| /// of `codepoint`. |
| pub bidi_mirroring_glyph: Codepoint, |
| } |
| |
| impl UcdFile for BidiMirroring { |
| fn relative_file_path() -> &'static Path { |
| Path::new("BidiMirroring.txt") |
| } |
| } |
| |
| impl UcdFileByCodepoint for BidiMirroring { |
| fn codepoints(&self) -> CodepointIter { |
| self.codepoint.into_iter() |
| } |
| } |
| |
| impl std::str::FromStr for BidiMirroring { |
| type Err = Error; |
| |
| fn from_str(line: &str) -> Result<BidiMirroring, Error> { |
| let re_parts = regex!( |
| r"(?x) |
| ^ |
| \s*(?P<codepoint>[A-F0-9]+)\s*; |
| \s*(?P<substitute_codepoint>[A-F0-9]+) |
| \s+ |
| \#(?:.+) |
| $ |
| ", |
| ); |
| let caps = match re_parts.captures(line.trim()) { |
| Some(caps) => caps, |
| None => return err!("invalid BidiMirroring line"), |
| }; |
| |
| Ok(BidiMirroring { |
| codepoint: caps["codepoint"].parse()?, |
| bidi_mirroring_glyph: caps["substitute_codepoint"].parse()?, |
| }) |
| } |
| } |
| |
| impl std::fmt::Display for BidiMirroring { |
| fn fmt(&self, f: &mut std::fmt::Formatter<'_>) -> std::fmt::Result { |
| write!(f, "{};", self.codepoint)?; |
| write!(f, "{};", self.bidi_mirroring_glyph)?; |
| Ok(()) |
| } |
| } |
| |
| #[cfg(test)] |
| mod tests { |
| use crate::common::Codepoint; |
| |
| use super::BidiMirroring; |
| |
| fn codepoint(n: u32) -> Codepoint { |
| Codepoint::from_u32(n).unwrap() |
| } |
| |
| #[test] |
| fn parse() { |
| let line = "0028; 0029 # LEFT PARENTHESIS\n"; |
| let data: BidiMirroring = line.parse().unwrap(); |
| assert_eq!( |
| data, |
| BidiMirroring { |
| codepoint: codepoint(0x0028), |
| bidi_mirroring_glyph: codepoint(0x0029), |
| } |
| ); |
| } |
| |
| #[test] |
| fn parse_best_fit() { |
| let line = "228A; 228B # [BEST FIT] SUBSET OF WITH NOT EQUAL TO\n"; |
| let data: BidiMirroring = line.parse().unwrap(); |
| assert_eq!( |
| data, |
| BidiMirroring { |
| codepoint: codepoint(0x228A), |
| bidi_mirroring_glyph: codepoint(0x228B), |
| } |
| ); |
| } |
| } |