Correctly calculate character widths (#820)

Cargo.lock

@@ -446,6 +446,7 @@ dependencies = [
  "shellwords",
  "strip-ansi-escapes",
  "thiserror",
+ "unicode-width",
  "walkdir",
 ]
 
@@ -973,6 +974,12 @@ version = "1.0.8"
 source = "registry+https://github.com/rust-lang/crates.io-index"
 checksum = "e5464a87b239f13a63a501f2701565754bae92d243d4bb7eb12f6d57d2269bf4"
 
+[[package]]
+name = "unicode-width"
+version = "0.1.10"
+source = "registry+https://github.com/rust-lang/crates.io-index"
+checksum = "c0edd1e5b14653f783770bce4a4dabb4a5108a5370a5f5d8cfe8710c361f6c8b"
+
 [[package]]
 name = "unicode-xid"
 version = "0.2.2"

Cargo.toml

@@ -35,6 +35,7 @@ serde = { version = "1.0.159", features = ["derive"] }
 serde_yaml = "0.9.21"
 dns_common_derive = { version = "0.2.1" }
 dns_common = { version = "0.2.1", default-features = false, features = ["yaml", "json"] }
+unicode-width = "0.1.10"
 
 [lib]
 name = "navi"

src/deser/mod.rs

@@ -1,4 +1,5 @@
 use crate::prelude::*;
+use unicode_width::UnicodeWidthStr;
 
 pub mod raycast;
 pub mod terminal;
@@ -26,9 +27,18 @@ pub fn fix_newlines(txt: &str) -> String {
 }
 
 fn limit_str(text: &str, length: usize) -> String {
-    if text.len() > length {
+    let len = UnicodeWidthStr::width(text);
-        format!("{}…", text.chars().take(length - 1).collect::<String>())
+    if len <= length {
+        format!("{}{}", text, " ".repeat(length - len))
     } else {
-        format!("{:width$}", text, width = length)
+        let mut new_length = length;
+        let mut actual_length = 9999;
+        let mut txt = text.to_owned();
+        while actual_length > length {
+            txt = txt.chars().take(new_length - 1).collect::<String>();
+            actual_length = UnicodeWidthStr::width(txt.as_str());
+            new_length -= 1;
+        }
+        format!("{}…", txt)
     }
 }