truncateString static method

String truncateString(String value, int maxLength)

Truncate the given String to maxLength using String.length (not user-perceived characters).

See also:

• Dart's characters package.
• Dart's documentation on runes and grapheme clusters.

Implementation

static String truncateString(String value, int maxLength) {
  //
  // If the text fits the available space, use it all.
  if (value.length <= maxLength)
    return value;
  //
  // If the text doesn't fit the available space, we must cut it,
  // but do not cut a grapheme in half.
  else {
    List<String> chars = [];
    int length = 0;
    for (String char in value.characters) {
      length += char.length;
      if (length <= maxLength) {
        chars.add(char);
      }
    }
    return chars.join();
  }
}