| use std::path::{Path, PathBuf}; |
| |
| use crate::{ |
| common::{ |
| parse_codepoint_association, CodepointIter, Codepoints, UcdFile, |
| UcdFileByCodepoint, |
| }, |
| error::Error, |
| }; |
| |
| /// A single row in the `emoji-data.txt` file. |
| /// |
| /// The `emoji-data.txt` file is the source of truth on several Emoji-related |
| /// Unicode properties. |
| /// |
| /// Note that `emoji-data.txt` is not formally part of the Unicode Character |
| /// Database. You can download the Emoji data files separately here: |
| /// https://unicode.org/Public/emoji/ |
| #[derive(Clone, Debug, Default, Eq, PartialEq)] |
| pub struct EmojiProperty { |
| /// The codepoint or codepoint range for this entry. |
| pub codepoints: Codepoints, |
| /// The property name assigned to the codepoints in this entry. |
| pub property: String, |
| } |
| |
| impl UcdFile for EmojiProperty { |
| fn relative_file_path() -> &'static Path { |
| Path::new("emoji/emoji-data.txt") |
| } |
| |
| fn file_path<P: AsRef<Path>>(ucd_dir: P) -> PathBuf { |
| let ucd_dir = ucd_dir.as_ref(); |
| // The standard location, but only on UCDs from 13.0.0 and up. |
| let std = ucd_dir.join(Self::relative_file_path()); |
| if std.exists() { |
| std |
| } else { |
| // If the old location does exist, use it. |
| let legacy = ucd_dir.join("emoji-data.txt"); |
| if legacy.exists() { |
| legacy |
| } else { |
| // This might end up in an error message, so use the standard |
| // one if forced to choose. Arguably we could do something like |
| // peek |
| std |
| } |
| } |
| } |
| } |
| |
| impl UcdFileByCodepoint for EmojiProperty { |
| fn codepoints(&self) -> CodepointIter { |
| self.codepoints.into_iter() |
| } |
| } |
| |
| impl std::str::FromStr for EmojiProperty { |
| type Err = Error; |
| |
| fn from_str(line: &str) -> Result<EmojiProperty, Error> { |
| let (codepoints, property) = parse_codepoint_association(line)?; |
| Ok(EmojiProperty { codepoints, property: property.to_string() }) |
| } |
| } |
| |
| #[cfg(test)] |
| mod tests { |
| use super::EmojiProperty; |
| |
| #[test] |
| fn parse_single() { |
| let line = "24C2 ; Emoji # 1.1 [1] (Ⓜ️) circled M\n"; |
| let row: EmojiProperty = line.parse().unwrap(); |
| assert_eq!(row.codepoints, 0x24C2); |
| assert_eq!(row.property, "Emoji"); |
| } |
| |
| #[test] |
| fn parse_range() { |
| let line = "1FA6E..1FFFD ; Extended_Pictographic# NA[1424] (️..️) <reserved-1FA6E>..<reserved-1FFFD>\n"; |
| let row: EmojiProperty = line.parse().unwrap(); |
| assert_eq!(row.codepoints, (0x1FA6E, 0x1FFFD)); |
| assert_eq!(row.property, "Extended_Pictographic"); |
| } |
| } |