Initial commit

.gitignore

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+/target
+/Cargo.lock

Cargo.toml

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+[package]
+name = "chroma-syntaxis-comrak"
+version = "0.1.0"
+edition = "2021"
+
+[dependencies]
+chroma-syntaxis = { git = "https://git.lavender.software/charlotte/chroma-syntaxis.git", features = ["built-in"] }
+comrak = "0.12.1"

src/lib.rs

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+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>) -> String {
+        String::from("<pre>")
+    }
+
+    fn build_code_tag(&self, attributes: &HashMap<String, String>) -> String {
+        let mut s = String::from("<code");
+
+        for (k, v) in attributes {
+            s.push(' ');
+            s.push_str(k);
+            s.push('=');
+            s.push('"');
+            s.push_str(v);
+            s.push('"');
+        }
+
+        s.push('>');
+        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#"<p>Hello :)</p>
+<p>Here is some code:</p>
+<pre><code class="language-rust"><span class="keyword">fn</span> <span class="function">main</span><span class="punctuation bracket">()</span> {
+    <span class="function macro">println!</span><span class="punctuation bracket">(</span><span class="string">"Hello, world!"</span><span class="punctuation bracket">)</span>
+}
+</code></pre>
+"#
+        );
+    }
+}