malva 0.9.0

Configurable, smart and fast CSS, SCSS, Sass and Less formatter.
Documentation 
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use crate::ctx::Ctx;
use raffia::token::{Comment, CommentKind};
use tiny_pretty::Doc;

pub(crate) fn format_comment<'s>(comment: &Comment<'s>, ctx: &Ctx<'_, 's>) -> Doc<'s> {
    match comment.kind {
        CommentKind::Block => {
            let mut docs = vec![Doc::text("/*")];
            if ctx.options.format_comments
                && !comment
                    .content
                    .as_bytes()
                    .first()
                    .map(|b| b.is_ascii_whitespace())
                    .unwrap_or(true)
            {
                docs.push(Doc::space());
            }

            // we don't use `str::lines()` since it uses `split_inclusive`
            let mut lines = comment
                .content
                .split('\n')
                .map(|s| s.strip_suffix('\r').unwrap_or(s));

            let is_jsdoc_like = lines.clone().skip(1).all(|line| {
                let trimmed = line.trim_start();
                trimmed.is_empty() || trimmed.starts_with('*')
            });

            if is_jsdoc_like {
                if let Some(first) = lines.next() {
                    docs.push(Doc::text(first));
                };
                docs.extend(
                    lines.map(|line| Doc::hard_line().append(Doc::text(line.trim_start()))),
                );
            } else {
                docs.extend(itertools::intersperse(
                    lines.map(Doc::text),
                    Doc::empty_line(),
                ));
            }

            if ctx.options.format_comments
                && !comment
                    .content
                    .as_bytes()
                    .last()
                    .map(|b| b.is_ascii_whitespace())
                    .unwrap_or(true)
            {
                docs.push(Doc::space());
            }
            docs.push(Doc::text("*/"));

            if is_jsdoc_like {
                Doc::list(docs).nest(1)
            } else {
                Doc::list(docs)
            }
        }
        CommentKind::Line => {
            let content = comment.content.trim_end();
            if ctx.options.format_comments
                && !content
                    .as_bytes()
                    .first()
                    .map(|b| b.is_ascii_whitespace())
                    .unwrap_or(true)
            {
                Doc::text(format!("// {content}"))
            } else {
                Doc::text(format!("//{content}"))
            }
        }
    }
}