formatDelta static method

String formatDelta(SizeDelta delta, { NegativeValueOptions options = NegativeValueOptions.defaults, int decimals = 2, })

Format a byte delta with direction awareness.

Implementation

static String formatDelta(
  SizeDelta delta, {
  NegativeValueOptions options = NegativeValueOptions.defaults,
  int decimals = 2,
}) {
  if (delta.isUnchanged) {
    return options.unchangedLabel;
  }

  final converter = ByteConverter(delta.absoluteDifference);
  final baseStr = converter.display.auto(precision: decimals);

  if (options.mode == NegativeDisplayMode.custom &&
      options.customFormatter != null) {
    return options.customFormatter!(delta.difference, delta.isDecrease);
  }

  if (delta.isIncrease) {
    return '${options.increasePrefix}$baseStr${options.increaseSuffix}';
  }

  switch (options.mode) {
    case NegativeDisplayMode.minusSign:
      return '${options.decreasePrefix}$baseStr${options.decreaseSuffix}';
    case NegativeDisplayMode.parentheses:
      return '($baseStr)';
    case NegativeDisplayMode.decreaseSuffix:
      return '$baseStr decrease';
    case NegativeDisplayMode.reductionSuffix:
      return '$baseStr reduction';
    case NegativeDisplayMode.lossSuffix:
      return '$baseStr loss';
    case NegativeDisplayMode.absolute:
      return baseStr;
    case NegativeDisplayMode.custom:
      return baseStr;
  }
}