feat(elements): cleanup and minor refactor

src/elements/table.rs

@@ -1,5 +1,12 @@
 use std::borrow::Cow;
 
+use nom::{
+    combinator::{peek, verify},
+    IResult,
+};
+
+use crate::parsers::{line, take_lines_while};
+
 #[derive(Debug)]
 #[cfg_attr(test, derive(PartialEq))]
 #[cfg_attr(feature = "ser", derive(serde::Serialize))]
@@ -34,3 +41,35 @@ impl TableRow {
         }
     }
 }
+
+pub(crate) fn parse_table_el(input: &str) -> IResult<&str, &str> {
+    let (input, _) = peek(verify(line, |s: &str| {
+        let s = s.trim();
+        s.starts_with("+-") && s.as_bytes().iter().all(|&c| c == b'+' || c == b'-')
+    }))(input)?;
+
+    take_lines_while(|line| line.starts_with('|') || line.starts_with('+'))(input)
+}
+
+#[test]
+fn parse_table_el_() {
+    assert_eq!(
+        parse_table_el(
+            r#"+---+
+|   |
++---+
+
+"#
+        ),
+        Ok((
+            r#"
+"#,
+            r#"+---+
+|   |
++---+
+"#
+        ))
+    );
+    assert!(parse_table_el("").is_err());
+    assert!(parse_table_el("+----|---").is_err());
+}