darkfurrow.com-rust

 1use comrak::{markdown_to_html, ComrakOptions};
 2
 3fn options() -> ComrakOptions {
 4    let mut opts = ComrakOptions::default();
 5    opts.render.unsafe_ = true;
 6    opts
 7}
 8
 9/// render markdown, then strip the single wrapping `<p>...</p>` if there's
10/// exactly one. matches `render_md` in the original almanac.py.
11pub fn render_inline(text: &str) -> String {
12    let html = markdown_to_html(text, &options()).trim().to_string();
13    if html.starts_with("<p>") && html.ends_with("</p>") && count_substr(&html, "<p>") == 1 {
14        html[3..html.len() - 4].to_string()
15    } else {
16        html
17    }
18}
19
20/// render markdown keeping block-level tags. matches `render_md_block`.
21pub fn render_block(text: &str) -> String {
22    markdown_to_html(text, &options()).trim().to_string()
23}
24
25fn count_substr(s: &str, needle: &str) -> usize {
26    s.matches(needle).count()
27}
28
29#[cfg(test)]
30mod tests {
31    use super::*;
32
33    #[test]
34    fn inline_strips_single_p() {
35        assert_eq!(render_inline("simple text"), "simple text");
36    }
37
38    #[test]
39    fn inline_keeps_bold() {
40        assert_eq!(
41            render_inline("**plant leafy things**: lettuce"),
42            "<strong>plant leafy things</strong>: lettuce"
43        );
44    }
45
46    #[test]
47    fn block_keeps_paragraphs() {
48        let out = render_block("paragraph one\n\nparagraph two");
49        assert_eq!(out, "<p>paragraph one</p>\n<p>paragraph two</p>");
50    }
51}