use std::collections::HashMap; use chroma_syntaxis::highlight; use comrak::adapters::SyntaxHighlighterAdapter; pub struct ChromaSyntaxisAdapter<'a> { highlight_names: &'a [&'a str], } impl SyntaxHighlighterAdapter for ChromaSyntaxisAdapter<'_> { fn highlight(&self, lang: Option<&str>, code: &str) -> String { match lang { Some(lang) => highlight(lang, code, self.highlight_names), None => code.to_string(), } } fn build_pre_tag(&self, _attributes: &HashMap) -> String { String::from("
")
    }

    fn build_code_tag(&self, attributes: &HashMap) -> String {
        let mut s = String::from("');
        s
    }
}

#[cfg(test)]
mod tests {
    use chroma_syntaxis::built_in::{register_builtin_languages, COMMON_HIGHLIGHT_NAMES};
    use comrak::{markdown_to_html_with_plugins, ComrakOptions, ComrakPlugins};

    use crate::ChromaSyntaxisAdapter;

    #[test]
    fn highlight_rust() {
        register_builtin_languages();

        let highlighter = ChromaSyntaxisAdapter {
            highlight_names: COMMON_HIGHLIGHT_NAMES,
        };
        let mut plugins = ComrakPlugins::default();
        plugins.render.codefence_syntax_highlighter = Some(&highlighter);

        let input = r#"Hello :)

Here is some code:
        
```rust
fn main() {
    println!("Hello, world!")
}
```"#;

        let output = markdown_to_html_with_plugins(input, &ComrakOptions::default(), &plugins);

        assert_eq!(
            output,
            r#"
Hello :)


Here is some code:


fn main() {
    println!("Hello, world!")
}


"#
        );
    }
}