encodeText method

@override String encodeText(String text, { Codec codec = MailCodec.encodingUtf8, bool wrap = true, })

Encodes the specified text in quoted printable format.

text specifies the text to be encoded. codec the optional codec, which defaults to utf8. Set wrap to false in case you do not want to wrap lines.

Implementation

@override
String encodeText(final String text,
    {Codec codec = MailCodec.encodingUtf8, bool wrap = true}) {
  final buffer = StringBuffer();
  final runes = List.from(text.runes);
  final runeCount = runes.length;

  var lineCharacterCount = 0;

  for (var i = 0; i < runeCount; i++) {
    final rune = runes[i];
    if ((rune >= 32 && rune <= 60) ||
        (rune >= 62 && rune <= 126) ||
        rune == 9) {
      buffer.writeCharCode(rune);
      lineCharacterCount++;
    } else {
      if (i < runeCount - 1 &&
          rune == AsciiRunes.runeCarriageReturn &&
          runes[i + 1] == AsciiRunes.runeLineFeed) {
        buffer.write('\r\n');
        i++;
        lineCharacterCount = 0;
      } else if (rune == AsciiRunes.runeLineFeed) {
        buffer.write('\r\n');
        lineCharacterCount = 0;
      } else {
        //TODO some characters consist of more than a single rune
        lineCharacterCount += _writeQuotedPrintable(rune, buffer, codec);
      }
    }
    if (wrap && lineCharacterCount >= MailConventions.textLineMaxLength - 1) {
      buffer.write('=\r\n'); // soft line break
      lineCharacterCount = 0;
    }
  }
  return buffer.toString();
}