use gpui::HighlightStyle;use std::sync::Arc;use theme::SyntaxTheme; #[derive(Clone, Debug)]pub struct HighlightMap(Arc<[HighlightId]>); #[derive(Clone, Copy, Debug, PartialEq, Eq)]pub struct HighlightId(pub u32); const DEFAULT_SYNTAX_HIGHLIGHT_ID: HighlightId = HighlightId(u32::MAX); impl HighlightMap {    pub(crate) fn new(capture_names: &[&str], theme: &SyntaxTheme) -> Self {        // For each capture name in the highlight query, find the longest        // key in the theme's syntax styles that matches all of the        // dot-separated components of the capture name.        HighlightMap(            capture_names                .iter()                .map(|capture_name| {                    theme                        .highlights                        .iter()                        .enumerate()                        .filter_map(|(i, (key, _))| {                            let mut len = 0;                            let capture_parts = capture_name.split('.');                            for key_part in key.split('.') {                                if capture_parts.clone().any(|part| part == key_part) {                                    len += 1;                                } else {                                    return None;                                }                            }                            Some((i, len))                        })                        .max_by_key(|(_, len)| *len)                        .map_or(DEFAULT_SYNTAX_HIGHLIGHT_ID, |(i, _)| HighlightId(i as u32))                })                .collect(),        )    }     pub fn get(&self, capture_id: u32) -> HighlightId {        self.0            .get(capture_id as usize)            .copied()            .unwrap_or(DEFAULT_SYNTAX_HIGHLIGHT_ID)    }} impl HighlightId {    pub const TABSTOP_INSERT_ID: HighlightId = HighlightId(u32::MAX - 1);    pub const TABSTOP_REPLACE_ID: HighlightId = HighlightId(u32::MAX - 2);     pub(crate) fn is_default(&self) -> bool {        *self == DEFAULT_SYNTAX_HIGHLIGHT_ID    }     pub fn style(&self, theme: &SyntaxTheme) -> Option<HighlightStyle> {        theme.highlights.get(self.0 as usize).map(|entry| entry.1)    }     pub fn name<'a>(&self, theme: &'a SyntaxTheme) -> Option<&'a str> {        theme.highlights.get(self.0 as usize).map(|e| e.0.as_str())    }} impl Default for HighlightMap {    fn default() -> Self {        Self(Arc::new([]))    }} impl Default for HighlightId {    fn default() -> Self {        DEFAULT_SYNTAX_HIGHLIGHT_ID    }} #[cfg(test)]mod tests {    use super::*;    use gpui::rgba;     #[test]    fn test_highlight_map() {        let theme = SyntaxTheme {            highlights: [                ("function", rgba(0x100000ff)),                ("function.method", rgba(0x200000ff)),                ("function.async", rgba(0x300000ff)),                ("variable.builtin.self.rust", rgba(0x400000ff)),                ("variable.builtin", rgba(0x500000ff)),                ("variable", rgba(0x600000ff)),            ]            .iter()            .map(|(name, color)| (name.to_string(), (*color).into()))            .collect(),        };         let capture_names = &[            "function.special",            "function.async.rust",            "variable.builtin.self",        ];         let map = HighlightMap::new(capture_names, &theme);        assert_eq!(map.get(0).name(&theme), Some("function"));        assert_eq!(map.get(1).name(&theme), Some("function.async"));        assert_eq!(map.get(2).name(&theme), Some("variable.builtin"));    }}