truncate function

String truncate(String text, int width)

Truncates text to width characters, adding an ellipsis if clipped.

If text fits within width, it's returned unchanged. If truncation is needed, the last character becomes '…'.

Example:

truncate('Hello World', 8); // 'Hello W…'
truncate('Hi', 10); // 'Hi'

Implementation

String truncate(String text, int width) {
  if (text.length <= width) return text;
  if (width <= 1) return text.substring(0, width);
  return '${text.substring(0, width - 1)}…';
}