fullToHalf property

String get fullToHalf

字符串全角转半角

Implementation

String get fullToHalf {
  if (this == null || this!.isEmpty) {
    return "";
  }

  final StringBuffer buffer = StringBuffer();
  for (int i = 0; i < this!.length; i++) {
    final int code = this!.codeUnitAt(i);
    // 全角空格转换为半角空格
    if (code == 12288) {
      buffer.writeCharCode(32);
    }
    // 全角字符范围：65281 到 65374
    else if (code >= 65281 && code <= 65374) {
      buffer.writeCharCode(code - 65248);
    }
    // 其他字符保持不变
    else {
      buffer.writeCharCode(code);
    }
  }
  return buffer.toString();
}