Function strip_snippet_parens

src/completion/handler.rs:101–129

Downgrade callable snippet items to plain-name insertions. When `(` already follows the cursor, snippets that insert their own parentheses would produce duplicates. This strips the snippet format and replaces the insert text with just the name from `filter_text`. Applies to methods, functions, and class names (for `new` / `throw new`).

(items: Vec<CompletionItem>)

///
/// Applies to methods, functions, and class names (for `new` / `throw new`).
fn strip_snippet_parens(items: Vec<CompletionItem>) -> Vec<CompletionItem> {
    items
        .into_iter()
        .map(|mut item| {
            if item.insert_text_format == Some(InsertTextFormat::SNIPPET)
                && matches!(
                    item.kind,
                    Some(CompletionItemKind::METHOD)
                        | Some(CompletionItemKind::FUNCTION)
                        | Some(CompletionItemKind::CLASS)
                )
            {
                // Replace the snippet with just the name
                // (the filter_text already holds it).
                if let Some(ref name) = item.filter_text {
                    item.insert_text = Some(name.clone());
                }
                // Also clear any text_edit that carries the snippet text.
                if let Some(CompletionTextEdit::Edit(ref mut te)) = item.text_edit
                    && let Some(ref name) = item.filter_text
                {
                    te.new_text = name.clone();
                }
                item.insert_text_format = None;
            }
            item
        })
        .collect()
}

/// Filter out completion items for classes defined in the current file.
///