flutter 实现word-break 效果

extension TextOverflowUtil on String {
  /// 将flutter系统默认的单词截断模式转换成字符截断模式
  /// 通过向文本中插入宽度为0的空格实现
  String toCharacterBreakStr() {
    if (isEmpty) {
      return this;
    }
    String breakWord = '';
    for (var element in runes) {
      breakWord += String.fromCharCode(element);
      breakWord += '\u200B';
    }
    return breakWord;
  }
}