Function nested_cell_str

src/mcp/tools/render.rs:443–473

Renders a nested JSON value into a single table cell without dumping raw JSON. Arrays of objects become `name (file:line)`-style summaries; plain objects become compact `k=v` strings; arrays of scalars are comma-joined.

(v: &Value)

/// JSON. Arrays of objects become `name (file:line)`-style summaries; plain
/// objects become compact `k=v` strings; arrays of scalars are comma-joined.
fn nested_cell_str(v: &Value) -> String {
    const MAX_ITEMS: usize = 3;

    match v {
        Value::Array(arr) => {
            if arr.is_empty() {
                return "none".to_string();
            }
            let shown: Vec<String> = arr
                .iter()
                .take(MAX_ITEMS)
                .map(|e| match e {
                    Value::Object(obj) => summarize_object(obj),
                    _ => scalar_str(e),
                })
                .collect();
            if arr.len() > MAX_ITEMS {
                format!(
                    "{} … (+{} more, {} total)",
                    shown.join("; "),
                    arr.len() - MAX_ITEMS,
                    arr.len()
                )
            } else {
                shown.join("; ")
            }
        }
        Value::Object(obj) => summarize_object(obj),
        _ => scalar_str(v),
    }
}

/// Compact one-line summary of an object for a table cell. Prefers a
/// `name (file:line)` shape when those keys exist, else `k=v` pairs.