Actually unicode_width is more suitable

Cargo.toml

@@ -17,4 +17,4 @@ keywords = ["ascii", "table"]
 colorful = "0.2"
 
 [dependencies]
-unicode-segmentation = "1.7.1"
+unicode-width = "0.1.8"

src/lib.rs

@@ -58,7 +58,7 @@ mod test;
 use std::collections::BTreeMap;
 use std::fmt::Display;
 
-use unicode_segmentation::UnicodeSegmentation;
+use unicode_width::UnicodeWidthStr;
 
 const SE: &str = "┌";
 const NW: &str = "┘";
@@ -398,7 +398,7 @@ impl SmartString {
     fn char_len(&self) -> usize {
         self.fragments.iter()
             .filter(|(visible, _)| *visible)
-            .map(|(_, string)| UnicodeSegmentation::graphemes(string.as_str(), true).count())
+            .map(|(_, string)| UnicodeWidthStr::width(string.as_str()))
             .sum()
     }
 

src/test.rs

@@ -335,14 +335,14 @@ fn show_one_character_for_header2() {
 #[test]
 fn cube_with_partial_content() {
     let config = cube_config();
-    let input: Vec<&[i32]> = vec![&[1, 2, 3], &[4, 5], &[7]];
-    let expected = "┌───┬───┬───┐\n\
-                    │ a │ b │ c │\n\
-                    ├───┼───┼───┤\n\
-                    │ 1 │ 2 │ 3 │\n\
-                    │ 4 │ 5 │   │\n\
-                    │ 7 │   │   │\n\
-                    └───┴───┴───┘\n";
+    let input: Vec<&[&str]> = vec![&["1", "2", "😞"], &["4", "5"], &["7"]];
+    let expected = "┌───┬───┬────┐\n\
+                    │ a │ b │ c  │\n\
+                    ├───┼───┼────┤\n\
+                    │ 1 │ 2 │ 😞 │\n\
+                    │ 4 │ 5 │    │\n\
+                    │ 7 │   │    │\n\
+                    └───┴───┴────┘\n";
 
     assert_eq!(expected, config.format(input));
 }