0.6.0: add trim_string

tui/src/tui_content/tui_string.rs

@@ -20,6 +20,22 @@ impl_content_layout_render!(TuiOut: |self: Arc<str>, to|
     layout = to.center_xy([self.chars().count() as u16, 1]);
     render = to.blit(self, to.area.x(), to.area.y(), None));
 
+/// Trim string with [unicode_width].
+pub fn trim_string (max_width: usize, input: impl AsRef<str>) -> String {
+    let input = input.as_ref();
+    let mut output = Vec::with_capacity(input.len());
+    let mut width: usize = 1;
+    let mut chars = input.chars();
+    while let Some(c) = chars.next() {
+        if width > max_width {
+            break
+        }
+        output.push(c);
+        width += c.width().unwrap_or(0);
+    }
+    return output.into_iter().collect()
+}
+
 /// Displays an owned [str]-like with fixed maximum width.
 ///
 /// Width is computed using [unicode_width].